JP4252600B2 - Toner container - Google Patents

Description

  The present invention relates to a toner container that is detachably attached to an image forming apparatus in order to supply toner to a developing device built in the image forming apparatus such as a copying machine, a printer, and a facsimile machine.

  Conventionally, a toner container as described in Patent Document 1 is known. The toner container is detachably attached to the developing device in order to supply toner to the developing device built in the apparatus main body of the image forming apparatus, and the amount of toner in the developing device is less than a preset amount. When this happens, the developing device is replenished with toner. Such a toner container includes a box-shaped container container in which toner is filled, and a toner replenishing device provided at the bottom of the container container for discharging and replenishing the developing device.

  The toner replenishing device includes a toner conveying screw (screw member in Patent Document 1) that directs toner in a container container toward a replenishing opening that is opened at the bottom of the container container, and a toner along the outer peripheral surface of the toner conveying screw. A cylindrical rotating shutter member is provided at a substantially central portion of the container. The rotary shutter member is rotatable around the cylinder center between a closed position where the shutter hole is closed and an open position where the shutter hole is opened. Further, the rotary shutter member is provided with a toner receiving opening and a toner returning opening formed by cutting out part of the peripheral surface on the upstream side and the downstream side in the toner transport direction.

When the rotary shutter member is set to the open position (that is, the shutter hole is opened) and the toner conveying screw is driven and rotated about the axis, the toner in the container container is discharged from the toner receiving opening. It is introduced into the rotary shutter member, discharged from the shutter hole, and replenished to the developing device. At this time, the toner that has not been discharged from the shutter hole is returned to the container container from the toner return opening.
JP 2003-280344 A

  However, in the toner container disclosed in Patent Document 1, toner that has not been discharged from the shutter hole among the toner introduced into the rotary shutter from the toner receiving opening by the toner transport screw is transferred from the toner return opening on the downstream side in the toner transport direction. It is set as the structure returned in a container. That is, although the toner is pushed in by the toner conveying screw, there is no escape place of the toner near the toner receiving opening, and the toner is compressed and easily agglomerated here. As this agglomeration progresses, the shutter hole is blocked by the toner mass, and there is a problem that the toner cannot be properly supplied.

  SUMMARY An advantage of some aspects of the invention is that it provides a toner container capable of preventing toner from being agglomerated in the vicinity of a toner discharge port.

  A toner container according to an aspect of the present invention that achieves the above object is a toner container that replenishes toner to a developing device, the container storing the toner and having a toner discharge port, and the toner in the container container A toner conveying screw for conveying the toner toward the toner discharge port, and a shutter cylinder having a toner discharge port positioned so as to correspond to the toner discharge port on the peripheral wall. Is inserted into the shutter cylinder, and the toner fed into the shutter cylinder by driving the toner conveying screw is injected into the container container on the peripheral wall upstream of the toner discharge port of the shutter cylinder in the toner conveying direction. An escape hole for escape is provided (claim 1).

  According to this configuration, by rotating the shutter cylinder around the cylinder center so that the toner discharge outlet faces the toner discharge port of the container container and driving the toner conveying screw, the toner in the container container is The toner is transported by the transport screw to reach the toner discharge outlet, and is supplied to the developing device through the toner discharge outlet and the toner discharge port of the container container.

  Since a relief hole is provided in the peripheral wall upstream of the toner discharge port of the shutter cylinder in the toner conveyance direction, a part of the toner carried into the shutter cylinder by driving the toner conveyance screw is removed from the relief hole. Escaped. Therefore, even if the toner is pushed into the shutter cylinder by the toner conveying screw, the toner is prevented from being agglomerated near the entrance of the shutter cylinder.

  In the above-described configuration, the shutter cylinder is attached to the side wall of the container container so as to be rotatable about a cylinder center, and a part of the shutter cylinder is elastically deformed on the toner inlet side to engage with the container container. It is desirable that a front end cylinder portion provided with a locking claw for performing a stopping operation is provided, and the escape hole is provided in the front end cylinder portion.

  According to such a configuration, the front end cylindrical portion provided on the toner inlet side of the shutter cylinder is shared as a portion where the escape hole is provided and a portion where the locking claw for mounting the shutter cylinder on the side wall of the container container is provided. For this reason, compared with the case where these members are provided in separate parts, the structure of the shutter cylinder is simplified, and the shutter cylinder can be made compact.

  In any one of the above configurations, it is desirable that the shutter cylinder has a ring seal on the outer periphery thereof.

  According to such a configuration, the ring seal effectively prevents the toner in the container from leaking to the outside through the peripheral surface of the shutter cylinder. In addition, reliable sealing performance can be obtained as compared with a sealing method in which a face seal is interposed at the edge of the shutter cylinder.

  In any one of the configurations described above, a cylindrical receiving portion having the toner discharge port opened is provided on a side wall of the container container, and the shutter cylinder is rotatably inserted into the cylindrical receiving portion. (Claim 4).

  According to such a configuration, since the shutter cylinder is rotatably inserted into the cylindrical receiving portion, compared with a case where the shutter cylinder is supported by simply making a hole in the side wall of the container container, the shutter cylinder is moved to the side wall of the container container. The wearing state of can be stabilized.

  In any one of the above configurations, the toner conveying screw includes a screw shaft and a spiral blade mounted on the screw shaft, and the screw shaft is supported by a bearing in the shutter cylinder, and the spiral blade is It is desirable that the screw shaft in a state of being inserted into the shutter cylinder is provided up to a position before the toner discharge outlet.

  According to such a configuration, the toner can be reliably conveyed to the toner discharge outlet, while the spiral blade does not exist near the toner discharge outlet, so that the toner is discharged smoothly.

  In this case, it is more desirable that a reverse spiral blade having a spiral shape opposite to the spiral shape of the spiral blade is provided at a position beyond the toner discharge port on the screw shaft.

  According to this configuration, of the toner carried into the shutter cylinder, the toner that is not discharged from the toner discharge outlet and goes toward the back side of the shutter cylinder is drawn toward the toner discharge outlet by the rotation of the reverse spiral blade. It becomes like this. Therefore, the toner can be discharged more smoothly from the toner discharge outlet.

  In any one of the above configurations, the shutter cylinder has a reduced diameter portion formed by reducing the diameter of a peripheral portion of the toner discharge outlet, and a seal pad is attached to the reduced diameter portion. Is desirable (Claim 7).

  According to such a configuration, the sealability around the toner discharge outlet can be secured by the seal pad. Therefore, when the toner in the container container is replenished to the developing device through the toner discharge port of the shutter cylinder and the toner discharge port of the container container, the toner is separated between the shutter cylinder and the side wall of the container container by the sealing action of the seal pad. It is possible to prevent leakage to the outside through the gap between them.

  In any one of the above-described configurations, it is desirable that the shutter cylinder is integrally provided with a lock member that locks the rotation of the shutter cylinder.

  According to such a configuration, the lock member that prevents the shutter cylinder from rotating is provided integrally with the shutter cylinder, so that the number of parts can be reduced.

  In any one of the above-described configurations, the shutter cylinder includes a flange that is in sliding contact with the side wall of the container container, and a guide rib that extends downward from the flange toward the mounting direction of the shutter cylinder on the side wall. (Claim 9).

  According to such a configuration, when the shutter cylinder is mounted on the side wall of the container container, the shutter cylinder is inserted into the side wall, so that the shutter cylinder is guided by the guide rib extending downward in the mounting direction to the side wall. Is done. For this reason, it is avoided that a flange interferes with a side wall, and mounting | wearing operation of a shutter cylinder becomes easy. Therefore, the workability of the assembly work of the shutter cylinder is improved.

  According to the present invention, in the toner container having a structure in which a part of the toner conveying screw is inserted into the shutter cylinder having the toner discharge outlet, the escape hole is provided in the shutter cylinder, so that the vicinity of the entrance of the shutter cylinder Thus, the toner is prevented from being agglomerated. Accordingly, the problem that the toner outlet is blocked by the toner lump is solved, and the toner can be stably supplied to the developing device for a long period of time.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, an outline of an image forming apparatus to which the toner container 20 according to the present embodiment is applied will be described with reference to FIGS.

  1 and 2 are external perspective views showing an embodiment of a printer. FIG. 1 shows a state in which a paper discharge tray 17 is attached to the apparatus main body 11, and FIG. The state where it was removed from is shown, respectively. 1 and 2, (A) is a perspective view seen from the right rear, and (B) is a perspective view seen from the left rear. FIG. 3 is an explanatory diagram of a cross-sectional view seen from the left side showing an embodiment of the internal structure of the apparatus main body 11. 1 to 3, the XX direction is referred to as the left-right direction, and the Y-Y direction is referred to as the front-rear direction. In particular, the -X direction is leftward, the + X direction is rightward, the -Y direction is forward, and the + Y direction is forwarded. It is called the back. Incidentally, in FIG. 1 and FIG. 2, the left and right direction of the page is opposite to the left and right direction displayed by X.

  The printer 10 includes a device main body 11 having a box shape in which various members for image formation to be described later are housed, a paper discharge tray 17 attached to the upper surface of the device main body 11 so as to be openable and closable, and the device main body 11. And a cover body 19 attached to the front face of the door so as to be openable and closable.

  The paper discharge tray 17 receives paper P that is discharged after image forming processing is performed in the apparatus main body 11. The paper discharge tray 17 rotates forward and backward around the lower edge of the rear end thereof, thereby closing the upper surface opening of the apparatus main body 11 (shown by a solid line in FIG. 1) and opening the opening. The posture can be changed between the posture R2 (shown by a dotted line in FIG. 1). The paper discharge tray 17 has an inclined surface in which the upper surface of the front half is formed so as to be inclined forward, and the paper P discharged from the upper rear surface of the cover body 19 is discharged while being guided by this inclined surface. It is discharged onto the tray 17.

  Further, the paper discharge tray 17 can be detached from the apparatus main body 11. As shown in FIG. 3, an opening is formed on the upper surface of the apparatus main body 11 over the entire surface behind the upper rear end of the cover body 19. This opening is for attaching and detaching a toner container 20 to be described later with the paper discharge tray 17 removed. A partition plate 18 is provided at a position slightly below the opening to partition the lower image forming unit 12. The toner container 20 is detachably attached to the apparatus main body 11 while being supported on the upper surface of the partition plate 18.

  The cover body 19 has an inverted L shape when viewed from the side (viewed from the + X direction), and its upper part is hung on the front upper corner of the apparatus main body 11. The cover body 19 has a lower end that can be rotated around a support shaft 191 provided on a predetermined frame of the apparatus main body 11, thereby closing the front opening of the apparatus main body 11 and the opening posture S <b> 1. The posture can be changed between the opened posture S2 opened (indicated by a two-dot chain line in FIG. 3).

  A paper discharge port 192 for discharging the paper P onto the paper discharge tray 17 is provided on the rear surface of the upper end portion of the cover body 19. The paper P passes between the front surface of the apparatus main body 11 and the rear surface of the cover body 19 and is discharged from the paper discharge port 192 onto the paper discharge tray 17.

  Next, the internal structure of the apparatus main body 11 will be described with reference to FIG. In the apparatus main body 11, an image forming unit 12 that forms an image based on image information transmitted from an external device such as a computer, and a toner image formed by the image forming unit 12 and transferred to the paper P is subjected to a fixing process. A fixing unit 13 to be applied, a sheet storage unit 14 for storing a transfer sheet, and a toner supply unit 15 for supplying toner to the image forming unit 12 are provided. Formed on the upper portion of the apparatus main body 11 is a paper discharge section 16 provided with the paper discharge tray 17 through which the paper P after the fixing process is discharged.

  At an appropriate position of the apparatus main body 11, an operation panel (not shown) for inputting the output conditions of the paper P and the like is provided. This operation panel is provided with a power key, a start button (not shown), various keys for inputting output conditions, and the like.

  The image forming unit 12 forms a toner image on the paper P fed from the paper storage unit 14. In this embodiment, as the image forming unit 12, a magenta unit 12M using magenta toner (developer) sequentially disposed from the upstream side (rear side in FIG. 3) to the downstream side, and cyan color In this example, a cyan unit 12C using a yellow toner, a yellow unit 12Y using a yellow toner, and a black unit 12K using a black toner are shown.

  Each unit 12M, 12C, 12Y, and 12K includes a photosensitive drum 121 and a developing device 122, respectively. The photosensitive drum 121 is for forming an electrostatic latent image and a toner image along the electrostatic latent image on the peripheral surface, and is an extremely smooth amorphous silicon layer that is tough and has excellent wear resistance on the peripheral surface. Etc. are laminated. Each photoconductive drum 121 receives supply of toner from a corresponding developing device 122 while rotating clockwise in FIG. Each developing device 122 is supplied with toner from the toner supply unit 15.

  A charging device 123 is provided immediately below each photoconductor drum 121, and an exposure device 124 is provided further below each charging device 123. Each photosensitive drum 121 is charged uniformly by the charging device 123. A laser beam corresponding to each color based on image data input from a computer or the like is irradiated from each exposure device 124 to the peripheral surface of the photosensitive drum 121 after charging, and the peripheral surface of each photosensitive drum 121 is electrostatically charged. A latent image is formed. By supplying toner from the developing device 122 to the electrostatic latent image, a toner image is formed on the peripheral surface of the photosensitive drum 121.

  A transfer belt 125 stretched between the driving roller 125a and the driven roller 125b is provided above the respective photosensitive drums 121 so as to be in contact with the respective photosensitive drums 121. The transfer belt 125 is driven by a drive roller 125 a and a driven roller while being synchronized with each photoconductive drum 121 while being pressed against the peripheral surface of the photoconductive drum 121 by a transfer roller 126 provided corresponding to each photoconductive drum 121. Circulate between the rollers 125b.

  Accordingly, when the transfer belt 125 circulates, the toner image of the magenta toner is transferred to the surface of the transfer belt 125 by the photosensitive drum 121 of the magenta unit 12M. The transfer of the image, and finally the black toner image, is performed in the overcoated state. As a result, a color toner image is formed on the surface of the transfer belt 125. The color toner image formed on the surface of the transfer belt 125 is transferred to the paper P conveyed from the paper storage unit 14.

  A cleaning device 127 that removes and cleans residual toner on the peripheral surface of the photosensitive drum 121 is provided at a position in front of each photosensitive drum 121. The peripheral surface of the photosensitive drum 121 cleaned by the cleaning device 127 goes to the charging device 123 for a new charging process.

  Waste toner removed from the peripheral surface of the photosensitive drum 121 by the cleaning device 127 is collected and stored in a toner collection bottle (not shown) through a predetermined path.

  At the front position of the image forming unit 12, a sheet conveyance path 111 extending in the vertical direction along the rear surface of the cover body 19 is formed. A registration roller pair 112 is provided at an appropriate position on the sheet conveyance path 111, and the sheet P fed from the sheet storage unit 14 is transferred to the transfer belt 125 that is wound around the driving roller 125 a by the driving of the registration roller pair 112. It is conveyed toward.

  In the sheet conveyance path 111, a second transfer roller 113 that is in contact with the surface of the transfer belt 125 is provided at a position facing the driving roller 125a. The sheet P is pressed and clamped between the transfer belt 125 and the second transfer roller 113 while being conveyed through the sheet conveyance path 111, whereby the toner image on the transfer belt 125 is transferred.

  The fixing unit 13 performs a fixing process on the toner image on the sheet transferred by the image forming unit 12 including the photosensitive drum 121 and the transfer belt 125 and includes a fixing device 131. The fixing device 131 is provided immediately above the second transfer roller 113, and the paper P supplied to the fixing unit 13 with the toner image on the transfer belt 125 transferred is subjected to fixing processing by the fixing device 131. The

  The fixing device 131 includes a fixing roller 132 having an energization heating element such as a halogen lamp inside, and a pressure roller 133 disposed so as to face the fixing roller 132 so that peripheral surfaces thereof are in contact with each other. Yes. When the image forming processed paper P sent from the image forming unit 12 passes through the nip portion between the fixing roller 132 and the pressure roller 133 by the driving of the fixing roller 132, heat from the fixing roller 132 is generated. The fixing process is performed. Thereafter, the paper P is discharged toward the paper discharge tray 17 of the paper discharge unit 16 through a paper discharge conveyance path 114 and a paper discharge port 192 extending from the upper part of the fixing unit 13.

  The paper storage unit 14 includes a paper tray 141 that is disposed below the exposure device 124 in the apparatus main body 11 and is detachably mounted. The paper tray 141 is configured to include a box body whose upper surface is open on the entire surface, and stores a paper bundle P1 in which a plurality of paper sheets P are stacked. The uppermost sheet P of the sheet bundle P1 stored in the sheet tray 141 is fed out toward the sheet conveyance path 111 by driving a pickup roller 142 disposed at the downstream end (front end in FIG. 3). Thereafter, the sheet P is fed to the nip portion between the second transfer roller 113 and the transfer belt 125 in the image forming unit 12 through the sheet conveyance path 111 by driving the registration roller pair 112.

  The toner supply unit 15 includes four toner containers 20 (a magenta container 20M, a cyan container 20C, a yellow container 20Y, and a black container) corresponding to the units 12M, 12C, 12Y, and 12K of the image forming unit 12, respectively. A container 20K) is provided. The toner is supplied from the corresponding containers 20M, 20C, 20Y, and 20K to the developing devices 122 of the units 12M, 12C, 12Y, and 12K when the remaining amount decreases.

  As described above, the cover body 19 can be opened and closed with respect to the front side of the apparatus main body 11 by changing the posture between the closed posture S1 and the open posture S2. The cover body 19 is normally set in the closed position S1 so that the sheet from the sheet storage unit 14 is conveyed toward the second transfer roller 113 between the image forming unit 12 and the front surface in FIG. The sheet conveyance path 111 is formed.

  When a paper jam occurs in the registration roller pair 112 or the fixing unit 13, the cover body 19 is opened (that is, the posture is changed from the closed posture S1 to the open posture S2). Thus, the user can easily remove the jammed paper from the paper conveyance path 111 and the fixing unit 13 exposed to the outside.

  The cover body 19 is for double-sided printing so that the paper P that has passed through the second transfer roller 113 is turned inside and then returned to the paper transport path 111 and the back side thereof is also subjected to printing processing. However, the illustration and description thereof are omitted.

  A horizontally long opening / closing lid 110 that is opened when the toner container 20 is attached to and detached from the apparatus main body 11 is provided on the upper left side of the apparatus main body 11. When the opening / closing lid 110 is opened (FIG. 2B), an operation lever 642 (FIG. 12) of the toner container 20 to be described later is operated, whereby the toner container 20 is placed in the container housing chamber of the apparatus main body 11. It is attached to and detached from Q.

  4 to 6 are perspective views showing an embodiment of the toner container 20 according to the present invention, FIG. 4 is a partially cutaway exploded perspective view, and FIGS. 5 and 6 are assembled perspective views. FIG. 5 is a partially cut-out assembled perspective view seen from the front side obliquely upward, and FIG. 6 is a perspective view seen from the back side obliquely below. 7 is a sectional view taken along line VII-VII in FIG. 5, and FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 4 to 7 are the same as those shown in FIG. 1 (X is the left-right direction (-X: leftward, + X: rightward), Y is the front-rear direction (-Y: forward, + Y). : Back)).

  Of the four toner containers 20, the magenta container 20M, the cyan container 20C, and the yellow container 20Y all have the same capacity and the same specifications. On the other hand, the black container 20K is set to a capacity larger than these, and the specifications are different from those of the other containers. Hereinafter, the toner container 20 will be described for the magenta to yellow containers 20M, 20C, and 20Y. Incidentally, the basic configuration of the black container 20K is the same as those described above except that the capacity and specific specifications are different.

  The toner container 20 supplies a container container 30 that is long in the left-right direction for storing toner, an agitator 40 that agitates the toner in the container container 30, and toner that is being agitated by the agitator 40 to the developing device 122. Therefore, the posture is changed between the transport member 50 transported in the container container 30, the open posture in which the toner transported by the transport member 50 is directed to the developing device 122, and the closed posture in which the supply to the developing device 122 is regulated. A possible shutter cylinder 60 and a cover lid 70 that covers one end face of the container container 30 (left plate 314 described later) are provided.

  The container container 30 includes a container main body 31 whose upper surface is opened over substantially the entire surface, and a lid 35 that closes the upper surface opening of the container main body 31. The container body 31 is provided with a shutter mounting cylinder 32 (cylindrical receiving portion) for inserting and mounting the shutter cylinder 60 from the left surface side at the left end position of the bottom.

  The container body 31 includes an arc bottom plate 311 formed in a downward convex arc shape, a front plate 312 erected from the front edge of the arc bottom plate 311, and an upward extension from the rear edge. A rear side plate 313 provided, a left side plate (side wall) 314 provided between right edges of the rear side plate 313, the front side plate 312 and the arc bottom plate 311, and a right side provided between the left edges. And a plate 315. A space surrounded by the arc bottom plate 311, the front side plate 312, the rear side plate 313, the left side plate 314, and the right side plate 315 is a toner charging chamber Z for charging toner.

  The arc bottom plate 311 is provided with a screw storage recess 316 as shown in FIG. The screw storage recess 316 is a recess having an arcuate cross section that is bulged downward from a position slightly in front of the center of the arc bottom plate 311 in the front-rear direction and extends over the entire length in the left-right direction. A hook-shaped toner conveyance space Z1 is formed on the inner surface side of the screw storage recess 316, and the conveyance member 50 is mounted in the toner conveyance space Z1. The screw storage recess 316 is formed in a substantially semicircular shape in a cross-sectional view from the left-right direction, whereby an upper half of a later-described toner transport screw 51 mounted in the toner transport space Z1 is directed upward from the toner transport space Z1. And projecting (see FIG. 7).

  By forming the screw storage recess 316 on the inner surface side of the arc bottom plate 311, as a result, an arc-shaped protrusion 316 a that exhibits an arc shape in a cross-sectional view along the screw storage recess 316 is formed on the outer surface side of the arc bottom plate 311. Has been. Due to the presence of the arcuate ridges 316a, the structural strength of the container body 31 is improved.

  The left plate 314 is provided with a toner filling port 314a for filling toner into the toner filling chamber Z at a position in the upper rear portion thereof, and slightly ahead of the center of curvature of the arc bottom plate 311. A shaft support tube (shaft support portion) 314b through which the central shaft 421 of the agitator 40 penetrates in a slidable contact state protrudes rightward.

  A toner loading cylinder 317 is provided at the toner filling port 314a so as to surround the toner filling port 314a. The toner loading cylinder 317 is fitted with a synthetic resin plug member 314e after the container body 31 is filled with toner.

  FIG. 9 is a perspective view for explaining the operation of filling the toner container 20 with toner. As shown in FIG. 9, when the toner container 20 is filled with toner, the driving force transmission side of the toner container 20 (the side of the right plate 315 provided with the stirring gear 49 and the conveyance gear 53) is on the lower side. Thus, the left side plate 314 on the operation side provided with the operation lever 642 is set upward. In this state, the tip of the funnel J is inserted into the toner filling port 314a, and the toner is filled into the toner container 20 through the funnel J.

  The reason why the toner filling port 314a is provided in the left side plate 314 is as follows. That is, in this embodiment, the toner container 20 is attached to and detached from the container storage chamber Q of the apparatus main body 11 from above. For this reason, when a cylindrical toner filling port 314a is provided on the surface (front plate 312 and rear plate 313) along the attaching / detaching direction, the toner filling port 314a is plugged by the plug member 314e along the attaching / detaching direction. As a result, a bulge is generated on the surface, which obstructs the attachment and detachment of the toner container 20. Further, the stirring plate 49 and the transport gear 53 are attached to the right side plate 315 on the driving force transmission side, and there is not enough space for providing the toner filling port 314a. Accordingly, a large-diameter toner filling port 314a capable of high-speed toner filling is provided on the left side plate 314 on the operation side having a sufficient space.

  The toner filling port 314a is connected to the shaft support tube 314b as a shaft support portion that supports one end of the agitation shaft (in fact, the shaft support tube 314b with the cover lid 70 attached to the container main body 31). It is provided at a vacant position in the upper rear part of a sheath cylinder 719) to be fitted later. As a result, the shaft support cylinder 314b is in a positional relationship of being sandwiched between a toner filling port 314a and a forward swing prevention protrusion 731 described later.

  Since the left side plate 314 is provided with the toner filling port 314a in such a positional relationship, the toner filling funnel J has other members on the left side plate 314 (the cover lid 70 and the forward swing prevention protrusion 731). Interference with is avoided. Therefore, the toner filling operation from the toner filling port 314a can be performed smoothly.

  Further, the left plate 314 has a locking projection 314c and a locking claw for locking the cover lid 70 at a rear end position slightly above the central portion in the vertical direction and a front end position slightly below the same. A piece 314d is provided.

  Furthermore, a shutter mounting cylinder for mounting a shutter cylinder 60 is provided on the left plate 314 so as to protrude rightward and concentrically with the center of curvature of the screw storage recess 316 at a position below the locking claw piece 314d. 32 is provided.

  The arc bottom plate 311 is provided with support legs 33 for supporting the container container 30 on the partition plate 18 (FIG. 2). As shown in FIG. 6, the support legs 33 are provided at a pair of left and right left legs 331 projecting downward from an appropriate position on the right side of the arc bottom plate 311 and a lower left end of the arc bottom plate 311. And one right leg (cover member) 332.

  The right leg 332 has a role as a positioning member in the toner filling chamber Z and a role to protect a conveyance gear (driving force transmission portion) 53 described later, and is positioned downward at a position corresponding to the screw storage recess 316. And it is provided in a state protruding toward the left. The right leg 332 includes a horizontal small plate 332a and a pair of front and rear vertical small plates 332b erected from front and rear ends of the horizontal small plate 332a. The transport gear 53 is housed and protected in a space surrounded by the horizontal small plate 332a and the pair of vertical small plates 332b.

  The right leg 332 is set so that the lower surface of the horizontal small plate 332a abuts on the same plane as the lower ends of the pair of left legs 331 (ie, is flush). Therefore, in a state where the toner container 20 is placed on the partition plate 18 of the apparatus body 11, the container body 31 is supported by the support legs 33 by three-point support, and the entire lower surface of the horizontal small plate 332 a is attached to the partition plate 18. Abut.

  On the other hand, on the driving force transmission side (right side) that transmits the driving force to the conveying member 50 in the apparatus main body 11, as shown in FIG. A positioning groove 101 corresponding to the right leg 332 of the container 20 is provided. When the toner container 20 is mounted in the container storage chamber Q, the right leg 332 is fitted into the positioning groove 101. By lowering the toner container 20 in this state, the toner container 20 is mounted in the container storage chamber Q while being guided by the positioning groove 101.

  Further, on the operation side (left side) for operating the shutter cylinder 60 of the toner container 20 in the apparatus main body 11, as shown in FIG. 2B, the shutter of each toner container 20 is placed on the left wall in the toner filling chamber Z. Support recesses 102 for supporting the mounting cylinder 32 are provided. The upper part of each support recess 102 is wide so that the shutter mounting cylinder 32 can be easily guided to the support recess 102.

  When the toner container 20 is mounted in the container storage chamber Q, the right leg 332 is fitted into the positioning groove 101, and then the shutter mounting cylinder 32 is moved to the wide upper portion of the support recess 102 while the toner container 20 is lowered. Insert into the part. As a result, the toner container 20 continues to descend while being guided by the positioning groove 101, and when the toner container 20 reaches the partition plate 18, the shutter mounting cylinder 32 is mounted in the container storage chamber Q in a positioning state in which the shutter mounting cylinder 32 is fitted into the support recess 102. The

  As described above, it is necessary to provide a dedicated member for protecting the conveyance gear 53 or positioning it by adopting the right leg 332 that serves as both the protection of the conveyance gear 53 and the positioning of the toner container 20 as the support leg 33. The number of parts can be reduced accordingly.

  The right plate 315 has a shaft support hole 315a facing the shaft support tube 314b in the left-right direction. The shaft support hole 315a is for inserting a connecting shaft 491 of a stirring gear 49 described later from the outer surface side of the right side plate 315. The right end of the agitator 40 is supported by the connecting shaft 491 so as to be integrally rotatable. Further, the right plate 315 is provided with a gear mounting cylinder 315b bulged toward the toner filling chamber Z at the lower rear portion of the shaft support hole 315a. The gear mounting cylinder 315b is fitted with approximately half the thickness of a later-described transport gear 53, and a partition wall provided on the left end surface of the gear mounting cylinder 315b supports a connecting shaft 531 of the transport gear 53 described later. A shaft support hole 315d is provided.

  On the outer surface side of the right plate 315, as shown in FIG. 6, an annular band 315c centering on the center of the shaft support hole 315a is provided to protect a stirring gear 49 described later. A portion corresponding to the right leg 332 of the annular band 315c is provided with a notch, and the space surrounded by the annular band 315c and the inside of the right leg 332 are in communication with each other through the notch.

  Returning to FIG. 4, the lid 35 closes the upper surface opening of the container body 31 and has the same shape as the container body 31 in a plan view. The lid body 35 includes a lid body 36 whose entire lower surface is open, and a lid body side flange 37 projecting outward from the lower end of the lid body 36 over the entire circumference.

  On the other hand, the container main body 31 is provided with a main body side flange 34 projecting from the upper edge portion over the entire circumference so as to face the lid side flange 37. The opposing surfaces of the flanges 34 and 37 are joined to each other via a predetermined adhesive or by a welding process, whereby the lid 35 is fixed to the container body 31.

  The lid body 36 is provided with a handle recess 38 at an appropriate position (right position in the present embodiment) on the front and rear side surfaces extending in the left-right direction. These handle recesses 38 are formed by recessing the front and rear side surfaces of the lid body 36 in a circular arc shape in a direction facing each other. Incidentally, in the present embodiment, a small handle recess 381 is formed on the front side surface of the lid body 36 so that a thumb can enter, and the index finger is positioned at a position facing the small handle recess 381 on the rear side surface. A large handle recess 382 is formed so that four fingers, the middle finger, the ring finger, and the little finger can be inserted.

  Further, the vertical dimension of the lid 35 is set to a dimension (approximately 10 mm in the present embodiment) at which the lid 35 can be grasped with at least a finger. As a result, the user can hold the lid 35 with his / her finger in a stable state and carry the toner container 20.

  At the upper edge of the handle recess 38 (the small handle recess 381 and the large handle recess 382), as shown in FIG. 6, a hooking strip 383 formed by bulging outward is provided. ing. By forming the hook 383, when the small handle recess 381 and the large handle recess 382 are gripped by the fingertip, the fingertip is hooked on the hook 383. For this reason, the problem that a fingertip slips does not arise and the user can hold the lid 35 more reliably.

  FIG. 10 is a perspective view illustrating a state where the toner container 20 is held. When gripping the toner container 20, as shown in FIG. 10, the user puts a thumb into the small handle recess 381 and also grips the handle recess 38 with the index finger to the little finger inserted into the large handle recess 382. By pulling the toner container 20 upward in this state, the toner container 20 is pulled upward from the container storage chamber Q of the printer 10.

  Returning to FIG. 4, the agitator 40 is provided to stir the toner in the container main body 31. The agitator 40 includes a shaft member 41 installed between a shaft support tube 314b provided in the left plate 314 of the container body 31 and a shaft support hole 315a formed in the right plate 315, and the shaft member 41. And a stirring gear 49 concentrically connected to the shaft member 41 so as to be integrally rotatable.

  The length of the shaft member 41 is set slightly shorter than the inner dimension between the left plate 314 and the right plate 315. The shaft member 41 includes a cross shaft (stirring shaft) 42 having a cross shape in a cross-sectional view, a plurality of blade support members 43 fitted on the cross shaft 42, and a right end side (drive force transmission) of the cross shaft 42. And a joint disc 44 concentrically fixed to the side).

  The blade support member 43 includes an outer fitting piece 431 fitted on the cross shaft 42 and a blade mounting piece 432 extending from the edge of the outer fitting piece 431 so as to be parallel to the cross shaft 42. Yes. In this embodiment, four blade supporting members 43 are employed, and an example in which the external fitting pieces 431 of these four blade supporting members 43 are externally fitted to the cross shaft 42 so as to be integrally rotatable at a constant pitch is shown. The cross shaft 42 has a central shaft 421 concentric with the cross shaft 42. The center shaft 421 protrudes leftward through the leftmost outer fitting piece 431 on the left end surface of the cross shaft 42. The central shaft 421 is fitted into the shaft support tube 314b of the left plate 314.

  The joint disc 44 is concentrically connected to the agitation gear 49 via a shaft support hole 315a so as to be integrally rotatable. The rotation of the stirring gear 49 is transmitted to the shaft member 41 via the joint disc 44.

  The stirring gear 49 has a connecting shaft 491 that protrudes leftward at the center position. The connecting shaft 491 is set to have a diameter slightly smaller than the hole diameter of the shaft support hole 315a, and is fitted into the shaft support hole 315a in a sliding state. A key protrusion projects from the tip of the connecting shaft 491. On the other hand, a key hole corresponding to the key protrusion is formed in the right surface of the joint disc 44. When the key protrusion is fitted into the key hole, the stirring gear 49 and the shaft member 41 can rotate integrally around the shaft center, and the rotation of the stirring gear 49 is transmitted to the shaft member 41.

  The shaft member 41 and the agitation gear 49 are connected to each other via an annular seal member 441 interposed between the right side plate 315 and the joint disc 44, as shown in FIG. The presence of the annular seal member 441 prevents the toner in the container body 31 from leaking through the shaft support hole 315a.

  The stirring blade 45 has a long edge fixed to the blade mounting piece 432 of the cross shaft 42 for stirring the toner, and is formed of a flexible synthetic resin film. The stirring blade 45 is set to have the same length as that of the cross shaft 42, and the width dimension (the radial dimension of the cross shaft 42) is the axis of the cross shaft 42 and the arc bottom plate 311 of the container body 31. It is set to be slightly longer than the distance between the inner surface.

  In such a stirring blade 45, a predetermined number of small holes 451 for mounting the stirring blade 45 on the blade mounting piece 432 are formed at an equal pitch at an edge of the long side. On the other hand, the blade mounting piece 432 is screwed with a screw hole 433 at a position corresponding to the small hole 451. The stirring blade 45 is attached to the shaft member 41 by screwing a predetermined screw into the screw hole 433 through each small hole 451 and fastening it.

  The stirring blade 45 is provided with a plurality of cut grooves 452. The cut groove 452 is formed by cutting the stirring blade 45 in the width direction from the edge on the side opposite to the side where the small hole 451 is provided (base end side) toward the base end side.

  When the shaft member 41 is mounted in the toner filling chamber Z of the container body 31, the shaft blade 41 is rotated in the clockwise direction in FIG. 311 is in contact with the inner surface side. The agitator 40 agitates the toner in the toner filling chamber Z while scraping off the toner adhering to the inner surface of the arc bottom plate 311 by the contact of the stirring blade 45.

  Next, the conveying member 50 will be described mainly with reference to FIGS. 4 and 11 with reference to other drawings as necessary. FIG. 11 is a perspective view of the agitator 40 and the conveying member 50 as viewed obliquely from the lower right front, paying attention to the relative positional relationship between the agitator 40 and the conveying member 50. The direction display by X and Y in FIG. 11 is the same as in FIG. 1 (X is the left-right direction (−X: leftward, + X: rightward), Y is the front-rear direction (−Y: forward, + Y: rearward). )).

  The conveyance member 50 conveys the toner being agitated by the agitator 40 toward the shutter cylinder 60 along the toner conveyance space Z1 of the screw storage recess 316 provided in the arc bottom plate 311 of the container body 31. .

  The conveying member 50 includes a toner conveying screw 51 disposed along the toner conveying space Z1 of the screw storage recess 316, a cylindrical body 52 that is concentrically and integrally extended from the right end portion of the toner conveying screw 51, and A conveyance gear 53 that is concentrically mounted on the cylindrical body 52 is provided.

  The toner conveying screw 51 includes a screw shaft 511 extending in the left-right direction, and a plurality of stirring fins (spiral blades) 512 that are integrally fitted on the screw shaft 511 at an equal pitch. The stirring fins 512 are attached over the substantially entire length of the screw shaft 511 so as to form a spiral shape in a continuous state. The left end of the screw shaft 511 is supported concentrically and relatively rotatably by a shutter cylinder 60 mounted on a shutter mounting cylinder 32 provided on the left plate 314.

  A stirring fin 512 is not provided at a portion of the screw shaft 511 corresponding to a later-described toner discharge port 321 of the shutter mounting cylinder 32. Instead, at least one rib (protrusion) (not shown) parallel to the screw shaft 511 is provided, and the spiral direction of the stirring fin 512 and the spiral direction are set at the tip (left end) of the screw shaft 511. A reverse spiral stirring fin 513 is provided. Therefore, the toner that has reached the toner discharge port 321 by the driving of the toner conveying screw 51 is drawn toward the toner discharge port 321 by the stirring fin 512 and the reverse spiral stirring fin 513, thereby smoothly passing through the toner discharge port 321. To be discharged.

  The cylindrical body 52 is for transmitting the drive rotation of the transport gear 53 to the toner transport screw 51, and has a concentric key hole formed on the right end surface thereof. The cylindrical body 52 is concentrically connected to the transport gear 53 mounted on the gear mounting cylinder 315b in a state where the right surface is in contact with the left surface of the gear mounting cylinder 315b of the right side plate 315. .

  The transport gear 53 rotates by obtaining a driving force from a driving motor (not shown) provided at an appropriate position in the apparatus main body 11. The rotation of the conveying gear 53 is directly transmitted to the toner conveying screw 51 and is transmitted to the shaft member 41 of the agitator 40 via the stirring gear 49. The transport gear 53 is disposed in the internal space of the right leg 332 and meshed with the stirring gear 49.

  On the left surface side of the transport gear 53, a connecting shaft 531 that is concentrically protruded leftward and is inserted into the shaft support hole 315d and connected to the cylindrical body 52 is provided. Further, a triangular joint protrusion 532 (FIG. 6) for transmitting the driving force of the driving motor is provided on the right surface side of the transport gear 53.

  On the front end surface (left surface) of the connecting shaft 531, a key protrusion is concentrically provided. On the right end surface of the cylindrical body 52, a key hole corresponding to the key protrusion is recessed. When the key protrusion is fitted into the key hole, the driving rotation of the conveying gear 53 is transmitted to the toner conveying screw 51 via the cylindrical body 52.

  As shown in FIG. 8, the toner conveying screw 51 is mounted in the screw storage recess 316 in the container main body 31 (that is, in the toner conveying space Z1), and the upper half of the toner conveying screw 51 is upward from the toner conveying space Z1. Protrusively toward. On the other hand, the stirring blade 45 is dimensioned so that the tip edge is elastically deformed and curved in a state where the tip edge is in sliding contact with the inner surface of the arc bottom plate 311.

  Accordingly, when the agitator 40 integrally rotates around the shaft member 41 in the clockwise direction in FIG. 8, the tip of the stirring blade 45 strokes the upper surface of the toner conveying screw 51 as shown by a two-dot chain line in FIG. It will be. As a result, a so-called shelf hanging phenomenon in which toner accumulates at a position above the toner conveying screw 51 does not occur, and the toner in the toner filling chamber Z is always supplied to the toner conveying screw 51 reliably.

  That is, when the depth of the toner conveying space Z1 is deeper than the diameter dimension (diameter) of the toner conveying screw 51 and the amount of bending of the agitating blade 45 is not large as in the prior art, the tip of the agitating blade 45 is It cannot come into contact with the peripheral surface of the toner conveying screw 51, and passes so as to rub the upper surface opening portion of the screw storage recess 316. This acts as a force for pressing and solidifying the toner present in the screw storage recess 316. As a result, a shelf hanging phenomenon occurs in which toner accumulates in a state like a ceiling of a tunnel in the upper surface opening portion of the screw storage recess 316, which may cause inconvenience that toner cannot be properly supplied to the developing device 122. However, by setting the depth of the screw storage recess 316 so that the upper half of the toner conveying screw 51 protrudes and is always in contact with the tip of the stirring blade 45 as in this embodiment, the occurrence of such inconveniences is ensured. Is prevented.

  Next, the shutter cylinder 60 will be described based on FIG. 4 and FIGS. 12 to 15 with reference to other drawings as necessary. 12 and 13 are partially cutaway perspective views showing an embodiment of the shutter cylinder 60. FIG. 12 shows a state in which the shutter cylinder 60 is set to the closing posture T1, and FIG. Indicates the state in which the posture is set to the open posture T2. 12 and 13, (A) is a view seen from the upper left front, and (B) is a view seen from the upper left rear.

  14A is a cross-sectional view taken along line XIII (A) -XIII (A) in FIG. 12A, and FIG. 14B is a cross-sectional view taken along line XIII (B) -XIII in FIG. B) It is a sectional view taken on line. Further, FIG. 15 is a cross-sectional view taken along line XV-XV in FIG. 14A, 14B, and 15 also show neighboring members such as the shutter mounting cylinder 32 and the toner conveying screw 51. In addition, the direction display by X and Y in FIGS. 12-15 is the same as that of FIG. 1 (X is a left-right direction (-X: leftward, + X: rightward), Y is the front-back direction (-Y: front, + Y: backward)).

  The shutter cylinder 60 is generally formed of a cylindrical body, and is rotated forward and backward about the cylinder center while being mounted on the shutter mounting cylinder 32 (FIG. 4) of the container main body 31, so that the conveyance member 50 The posture can be changed between an opening posture T2 in which the conveyed toner can be replenished toward the developing device 122 (FIG. 3) and a closing posture T1 in which the toner cannot be replenished. In a state where the shutter cylinder 60 is fitted in the shutter mounting cylinder 32, the left end portion of the screw shaft 511 of the toner conveying screw 51 is concentric with the shutter cylinder 60 so as to be relatively rotatable about the axis as shown in FIG. Supported.

  The shutter cylinder 60 includes a shutter cylinder 61, a locking cylinder (tip cylinder part) 62, a circular closing part 63, an operation part 64, a lock member 65, and a ring seal (annular seal member) 66. The shutter cylinder 61 is a cylindrical body that is inserted into the shutter mounting cylinder 32 of the container body 31. The locking cylinder 62 is a member for extending the shutter cylinder 61 concentrically from the front end side (right end side) of the shutter cylinder 61 toward the right and locking the shutter cylinder 61 to the shutter mounting cylinder 32. . The circular closing portion 63 is provided on the proximal end side (left end side) of the shutter cylinder 61 and is a member having a larger diameter than the shutter cylinder 61. The operating portion 64 is a member that protrudes from the left end surface of the circular closing portion 63 toward the left, and that rotates the shutter cylinder 61. The lock member 65 is a member that projects from the peripheral surface of the circular closing portion 63 and locks the setting postures (the closing posture T1 and the opening posture T2) of the shutter cylinder 60. The ring seal 66 is an elastic seal member that is externally fitted on the peripheral surface between the shutter cylinder 61 and the locking cylinder 62.

  On the other hand, as shown in FIGS. 14A and 14B, the shutter mounting cylinder 32 is set slightly longer in the left-right direction than the shutter cylinder 61. The shutter cylinder 60 is inserted into the shutter mounting cylinder 32 from the left end opening of the shutter mounting cylinder 32, and the circular closing portion 63 is stopped against the left end edge of the shutter mounting cylinder 32. In this inserted state, the shutter cylinder 61 is housed in the shutter mounting cylinder 32, and the locking cylinder 62 protrudes rightward from the shutter mounting cylinder 32, and the toner transport space of the container body 31. It will be in the state located in Z1.

  The inner diameter of the shutter mounting cylinder 32 is set slightly larger than the outer diameter of the shutter cylinder 61. In addition, an annular protrusion (first engagement portion) 322 is provided at the tip (right end) of the shutter mounting cylinder 32 so as to protrude concentrically inward. The inner peripheral surface of the annular protrusion 322 is in sliding contact with the outer peripheral surface of the locking cylindrical body 62.

  The inner diameter of the shutter cylinder 61 is set slightly larger than the outer diameter of the agitating fin 512 so that the agitating fin 512 can be inserted into the shutter cylinder 61. A concentric base end flange 611 is provided on the base end side (left end) of the shutter cylinder 61, and a front end flange 612 is provided on the front end side (right end). Each of these flanges 611 and 612 has an outer diameter dimension in which the outer peripheral surface is in sliding contact with the inner peripheral surface of the shutter mounting cylinder 32.

  On the peripheral surface of the shutter cylinder 61, a pair of ribs 613 are provided between the flanges 611 and 612 at a point-symmetrical position with respect to the cylinder center. On one peripheral surface of the shutter cylinder 61 between the pair of ribs 613, a toner discharge outlet 614 having a rectangular shape as viewed from the radial direction extending in the left-right direction is provided at the center position. A sponge-like seal pad 67 is attached to one surface (reduced diameter portion) 610 of the shutter cylinder 61 provided with the toner discharge outlet 614. As the seal pad 67, various synthetic resin foams can be used, and suitable examples thereof include a high-density microcell urethane sheet. The seal pad 67 is provided with a square hole 671 having the same shape at a position corresponding to the toner discharge port 614.

  On the other hand, the shutter mounting cylinder 32 is provided with a toner discharge port 321 at a position facing the toner discharge outlet 614. Therefore, the toner in the shutter cylinder 61 is discharged by the driving of the conveying member 50 in a state where leakage to the outside is prevented by the seal pad 67 when the shutter cylinder 60 is set to the open posture T2. 614, the square hole 671, and the toner discharge port 321 are supplied to the developing device 122.

  A guide rib 615 extending toward the right starting from the front end flange 612 is provided on the peripheral surface of the shutter cylinder 61 opposite to the peripheral surface where the toner discharge outlet 614 is provided. ing. The guide rib 615 is provided to facilitate the insertion operation when the shutter cylinder 60 is inserted into the shutter mounting cylinder 32. The guide rib 615 has a left-right length dimension set to be less than half that of the shutter cylinder 61 and a radial thickness dimension set slightly smaller than the base end flange 611 thickness dimension.

  At the tip (right end) of the guide rib 615, an inclined surface 615a that is inclined downward toward the peripheral surface of the shutter cylinder 61 is provided. Therefore, when the shutter cylinder 60 is inserted into the shutter mounting cylinder 32, the inclined surface 615a of the guide rib 615 abuts against the left end edge of the shutter mounting cylinder 32 and is then scooped up relative to the inclined surface 615a. For this reason, during the assembly work, the shutter cylinder 60 can be smoothly inserted into the shutter mounting cylinder 32 without the base end flange 611 colliding with the left end edge of the shutter mounting cylinder 32. Therefore, the workability of assembling the shutter cylinder 60 to the shutter mounting cylinder 32 can be improved.

  The locking cylinder 62 is provided with a pair of locking claws 621 formed in a state where peripheral surfaces facing each other in the radial direction are cut out in a concave shape, and the pair of locking claws A pair of relief holes 622 are provided so as to face each other with a phase shift of 90 ° with respect to the portion 621.

  The locking claw 621 restricts the movement of the screw shaft 511 in the axial direction in a state where the shutter cylinder 60 is inserted into the shutter mounting cylinder 32 from the left surface opening (specifically, the locking claw portion 621 prevents the screw shaft 511 from being removed to the left). ) And restricting the rotation around the cylinder center outside the predetermined range (specifically, the shutter member 60 is allowed to rotate only between the closing posture T1 and the opening posture T2). .

  The locking claw 621 includes a claw body 621a that protrudes from the right end of the locking cylinder 62 toward the recess-shaped space, and a tip (left end) of the claw body 621a. And a locking claw 621b projecting outward. The claw body 621 a protrudes outward from the ring seal 66. The locking claw 621b has a left end surface which is an orthogonal surface 621c parallel to a plane orthogonal to the cylindrical direction, and an inclined surface which is inclined downward from the outermost surface of the orthogonal surface 621c toward the claw body 621a. 621d.

  When the shutter cylinder 60 is inserted into the shutter mounting cylinder 32, the inclined surface 621 d of the locking claw 621 contacts the annular protrusion 322 after the right end of the locking cylinder 62 exceeds the annular protrusion 322 of the shutter mounting cylinder 32. Touch. With this contact, the engaging claw portion 621 is guided by the inclined surface 621d to be pushed down in the cylindrical direction by elastic deformation, and the engaging claw 621b can pass through the annular protrusion 322.

  The locking claw portion 621 is restored to the original state when the locking claw 621b passes through the annular protrusion 322. As a result, the orthogonal surface 621c of the locking claw 621b faces the annular protrusion 322, so that the shutter cylinder 60 is prevented from coming off toward the left.

  On the other hand, at the bottom of the container body 31, a small arc rod 316b (FIG. 6) provided between the arc-shaped ridge 316a and the shutter mounting cylinder 32, the left end edge of the small arc rod 316b, and the shutter mounting cylinder 32 are provided. And a large circular arc ridge 316c provided between the right end edge of each of the two.

  The small arc rod 316b is set so that the radius of curvature of the inner surface is slightly larger than the radius of the outer surface of the locking cylindrical body 62, whereby the locking cylindrical body 62 rotates in sliding contact with the small circular arc rod 316b. Further, as shown in FIG. 14B, the large arc rod 316c has a radius of curvature of the inner surface larger than the radius of curvature of the inner surface of the small arc rod 316b and the radial direction of the locking claws 621b of the locking cylinder 62. The diameter is set so that the tip of the wire does not interfere.

  As shown in FIG. 15, such a large arc ridge 316 c is formed with an arc-shaped protruding portion 316 d protruding inward by a part of the large arc ridge 316 c being recessed at a position ahead of the center portion. ing. The arcuate protrusion 316d has an inner radius of curvature that is shorter than the distance between the axis of the screw shaft 511 and the tip of the locking claw 621b. Therefore, the shutter cylinder 60 rotates around the cylinder center from the state in which one of the pair of locking claws 621b is in contact with the arcuate protrusion 316d until the other is in contact with the arcuate protrusion 316d. can do. FIG. 15 shows a state in which the lower locking claw 621b is in contact with the lower end edge of the arcuate protrusion 316d. Thereby, the rotation range of the shutter cylinder 60 is limited, and rotation other than the rotation range is restricted.

  In the example shown in FIG. 15, the shutter cylinder 60 is set to the open posture T2, so that the lower locking claw 621b is in contact with the lower end of the arcuate protrusion 316d. In this state, by rotating the shutter cylinder 60 clockwise around the cylinder center, the shutter cylinder 60 is closed in a state where the upper locking claw 621b is in contact with the upper end of the arcuate protrusion 316d. The posture is changed to the posture T1.

  For example, when the toner in the toner filling chamber Z is fed into the shutter cylinder 60 by driving the conveying member 50 in a state where the shutter cylinder 60 is in the closed posture T1, the escape hole 622 is configured to remove the fed toner into the toner filling chamber. It is for escaping to Z. The escape hole 622 is provided on the peripheral wall upstream of the toner discharge outlet 614 in the toner conveyance direction. By doing so, the toner pushed into the shutter cylinder 60 is prevented from being agglomerated.

  The circular closing portion 63 is for closing the left end surface of the shutter cylinder 61. The circular closing portion 63 includes a closing disc 631 and an annular body 632. The closing disc 631 is a disc that is concentric with the cylindrical center of the shutter cylinder 61 and has a larger diameter than the shutter cylinder 61 and is integrally fixed to the left end of the shutter cylinder 61. The annular body 632 is integrally formed on the peripheral surface of the closing disc 631 in a state of projecting leftward from the closing disc 631.

  As shown in FIGS. 14 (A) and 14 (B), a shaft support hole (bearing in the shutter cylinder) 633 is recessed at the center position of the right surface of the closing disc 631. In order to support the screw shaft 511 of the toner conveying screw 51, the left end portion of the screw shaft 511 is fitted into the shaft support hole 633.

  That is, the left end portion of the screw shaft 511 is fitted into the shaft support hole 633 in a state where the toner transport screw 51 is disposed in the toner transport space Z1 in the container body 31 and the left end portion is inserted into the shutter mounting cylinder 32. It is. As a result, the toner transport screw 51 is mounted in the toner transport space Z1 in the container body 31 so as to be integrally rotatable about the screw shaft 511.

  The operation unit 64 is for rotating the shutter cylinder 60 and is provided to project leftward from the closing disc 631 of the circular closing unit 63. The operation unit 64 includes a rectangular tube body 641 and an operation lever 642. The operation unit 64 has a rectangular tube shape when viewed from the end, and protrudes leftward from the annular body 632 in a state in which the upper surface corner is in contact with the inner peripheral surface of the annular body 632. The operation lever 642 is a lever for the user to pick and operate with a finger, and extends from the lower surface of the rectangular tube body 641 toward the radial direction of the annular body 632.

  The square cylinder body 641 and the operation lever 642 are provided with a not-illustrated knob cover whose shape is set so that it can be easily picked and operated. Although the actual rotation operation of the shutter cylinder 60 is performed through this knob cover, hereinafter, the rotation operation of the shutter cylinder 60 is expressed as the operation lever 642 being operated.

  In the present embodiment, the rectangular tube body 641 is positioned at the uppermost position of the closing disc 631 in a state where the shutter cylinder 60 is set to the closing posture T1 (FIG. 12), and the operation lever 642 is It is suspended from the cylindrical body 641. In this state, the shutter cylinder 60 that has been set to the closed posture T1 is changed to the open posture T2 by rotating the operation lever 642 approximately 90 ° counterclockwise around the cylinder center. (See FIG. 13).

  The locking member 65 is for locking the closing posture T1 and the opening posture T2 of the shutter cylinder 60 in the positional relationship with the cover lid 70. The lock member 65 is provided with a projecting piece 651 projecting from the outer peripheral surface of the annular body 632 of the circular closing portion 63, and an arc extending from the tip of the projecting piece 651 in the clockwise direction in FIG. An arc operating strip 652 capable of elastic deformation is provided.

  Here, the projecting piece 651 is provided at a position in the upper rear portion of the annular body 632 in a state where the shutter cylinder 60 is set in the closing posture T1 (FIG. 12), and the arc operating strip 652 has a center angle of curvature thereof. Shows an example in which is set to approximately 90 °.

  The arc operating strip 652 has a wide portion 652a from the projecting piece 651 to a position directed in a clockwise direction by a predetermined dimension (a dimension slightly shorter than half of the entire length). A narrow portion 652b which is narrowed by cutting out the right edge portion over the entire length is formed at a portion beyond the wide portion 652a. At the tip of the narrow portion 652b, an engagement piece 654 attached so as to be orthogonal to the arc operating strip 652 is provided. The engagement piece 654 protrudes toward the opposite side (ie, the outside) of the center of curvature of the arc operating strip 652.

  Further, on the outer surface side of the arc operating strip 652, a reinforcement bulging over the entire length of the narrow portion 652b, starting from a position slightly closer to the wide portion 652a from the boundary position between the wide portion 652a and the narrow portion 652b. Ribs 655 are provided. The arc operating strip 652 is reinforced in strength by the reinforcing rib 655. Such a locking action by the locking member 65 functions in relation to the cover lid 70, and therefore will be described together with the description of the cover lid 70 later.

  In the state where the shutter cylinder 60 is mounted on the shutter mounting cylinder 32, the ring seal 66 allows the toner in the toner filling chamber Z of the container body 31 to move between the inner peripheral surface of the shutter mounting cylinder 32 and the outer peripheral surface of the shutter cylindrical body 61. Prevent intrusion in between. The ring seal 66 is made of an elastomer (elastic material) such as rubber or soft synthetic resin.

  The ring seal 66 is set to have an inner diameter dimension slightly smaller than the outer diameter dimension of the locking cylinder 62 and an outer diameter dimension slightly larger than the inner diameter dimension of the shutter mounting cylinder 32. As shown in FIGS. 14A and 14B, the ring seal 66 is externally fitted to the proximal end portion of the locking cylinder 62 of the shutter cylinder 60 so as to contact the distal end flange 612.

  The ring seal 66 is sandwiched between the front end flange 612 of the shutter cylinder 60 and the annular protrusion 322 of the shutter mounting cylinder 32 in a state where the shutter cylinder 60 is inserted into the shutter mounting cylinder 32 and compressed and elastically deformed. Become. This prevents the toner in the toner filling chamber Z of the container container 30 from entering between the outer peripheral surface of the shutter cylinder 61 and the inner peripheral surface of the shutter mounting cylinder 32.

  After the shutter cylinder 60 configured as described above is inserted into the shutter mounting cylinder 32, a cover lid 70 as shown in FIG. 4 is attached to the left plate 314 of the container body 31. 16 and 17 are perspective views showing an embodiment of the cover lid 70. FIG. 16 shows a state immediately before the cover lid 70 is attached to the left side plate 314. FIG. 17 shows the cover lid 70 on the left side. FIG. 17 shows a state where the shutter cylinder 60 is attached to the plate 314 and the shutter cylinder 60 is set to the closed posture T1 (in FIG. 17, a state where the shutter cylinder is set to the open posture T2 is shown in a circle. ing). The direction display by X and Y in FIGS. 16 and 17 is the same as in FIG. 1 (X is the left-right direction (−X: leftward, + X: rightward), Y is the front-back direction (−Y: forward, + Y: Back)).

  As shown in FIG. 16, the cover lid 70 includes a lid body 71 having a shape along the lower half of the left side plate 314 of the container body 31, and a lower portion slightly behind the substantially central portion in the front-rear direction of the lid body 71. , A cylinder cover portion 72 projecting leftward and a projection 73 projecting leftward from the front surface of the lid main body 71 are provided. As the protrusion 73, a swing prevention protrusion (a swing prevention rib) 731 provided at a front position of a meniscus 711 described later, and a center formed on the cylinder cover 72 at a substantially central portion of the meniscus 711. A protrusion 732 is provided.

  The front swing prevention protrusion 731 is provided on the side wall facing the swing prevention protrusion 731 of the apparatus body 11 in a state where the container container 30 is mounted on the partition plate 18 of the container housing chamber Q of the apparatus body 11. Engage with a substantially engaging member. As a result, the toner container 20 is prevented from swinging due to the driving of the toner conveying screw 51.

  The lid main body 71 has a meniscus 711 formed in a half-moon shape so that the lower part thereof follows the shape of the lower part of the left side plate 314 of the container main body 31 except for a part (a part where the cylinder covering part 72 is provided). The upper inclined edge plate 712 extending obliquely upward from the upper edge portion of the substantially front half portion of the meniscus 711 and the upper curved edge extending from the upper edge portion of the substantially rear half portion of the meniscus 711 A plate 713, a front arc edge plate 714 extending rightward from the front arc edge of the meniscus 711, and a rearward extending rightward from the arc edge behind the meniscus 711 And an arc edge plate 715.

  The upper portion of the substantially second half portion of the meniscus 711 is cut out along the outer periphery of the toner loading cylinder 317 in order to avoid interference with the toner loading cylinder 317 provided so as to surround the toner filling port 314a of the container body 31. Is formed. The upper curved edge plate 713 is formed in an arc shape along the notch.

  A locking hole 716 is formed in the upper front portion of the meniscus 711. The locking hole 716 is for fitting a locking projection 314 c provided on the left plate 314 of the container body 31 and is provided at a position corresponding to the locking projection 314 c. In addition, a corner hole 717 into which a locking claw piece 314d provided on the left plate 314 is fitted is provided at a corner portion where the rear portion of the meniscus 711 and the rear arc edge plate 715 are combined.

  Further, an arc recess 718 for loosely fitting to the shutter mounting cylinder 32 from above is provided at a position slightly below the meniscus 711 and slightly rearward. In addition, a substantially cylindrical portion of the meniscus 711 is provided with a sheath tube 719 into which the shaft support tube 314b (FIG. 4) protruding from the left plate 314 toward the left is fitted.

  Such a cover lid 70 has a locking hole 716 fitted on the left side plate 314, and a locking claw piece 314d is mounted and locked on the square hole 717, so that the container lid is prevented from coming off. Mounted on the main body 31.

  The cylinder cover portion 72 is for covering the shutter cylinder 60 in a state where the cover lid 70 is mounted on the container main body 31. The cylinder cover portion 72 includes a crescent plate 721 having a crescent shape and a peripheral plate 722 formed along the outer periphery of the curvature of the arc-shaped crescent plate 721. The peripheral edge of the peripheral plate 722 is fixed to the edge of the circular arc recess 718 in the meniscus 711.

  The arc-shaped crescent plate 721 has an inner arc edge 721 a whose center of curvature is concentric with the axis of the circular closing portion 63 of the shutter cylinder 60 and whose radius of curvature is slightly larger than the outer diameter of the circular closing portion 63. Yes. Accordingly, when the cover lid 70 is mounted on the left side plate 314 of the container body 31 with the shutter cylinder 60 inserted into the shutter mounting cylinder 32, the outer peripheral surface of the circular closing portion 63 is within the inner arc edge 721a. It will face the periphery.

  The peripheral plate 722 is provided so that the inner surface side is in sliding contact with the arc operating strip 652 of the shutter cylinder 60. A guide groove 723 is formed between the peripheral plate 722 and the arc bottom plate 311 of the container body 31. The guide groove 723 is fitted with a reinforcing rib 655 provided on the arc operating strip 652 of the shutter cylinder 60. The reinforcing rib 655 is set to have a radial thickness dimension such that the outer peripheral surface of the reinforcing rib 655 slightly protrudes from the guide groove 723 in a state where the reinforcing rib 655 is fitted in the guide groove 723.

  A fixing piece 724 for fixing the cylinder covering portion 72 to the lid main body 71 is provided at the end portion of the guide groove 723 in the clockwise direction in FIG. The shutter cylinder 60 is restricted from rotating further in the clockwise direction when the end of the reinforcing rib 655 interferes with the fixed piece 724.

  A first locking groove 725 that is notched to the left is recessed at a position corresponding to the clockwise end of the guide groove 723 in the peripheral plate 722. Further, a second locking groove 726 formed by cutting the peripheral plate 722 leftward is provided at a position adjacent to the front side of the central swing prevention protrusion 732 in the guide groove 723. . The first locking groove 725 is for fitting the engagement piece 654 of the arc operating strip 652 in a state where the shutter cylinder 60 is set to the closing posture T1. Further, the second locking groove 726 is for fitting the engagement piece 654 in a state where the shutter cylinder 60 is set to the open posture T2.

  Therefore, by attaching the cover lid 70 to the container main body 31 with the shutter cylinder 60 mounted, the shutter 65 with the engagement piece 654 of the lock member 65 provided in the shutter cylinder 60 fitted in the guide groove 723 is removed. By operating the operation lever 642, the cylinder 60 rotates forward and backward around the cylinder center while the reinforcing rib 655 slides in the guide groove 723. Thus, the posture of the shutter cylinder 60 can be changed between the closed posture T1 and the open posture T2.

  In a state where the shutter cylinder 60 is set to the closing posture T1, the engagement piece 654 is fitted into the first locking groove 725, and the closing posture T1 of the shutter cylinder 60 thus set is locked. Further, in a state where the shutter cylinder 60 is set to the open posture T2, the engagement piece 654 is fitted into the second locking groove 726, and the open posture T2 of the shutter cylinder 60 thus set is locked.

  When the posture of the shutter cylinder 60 is changed, the user may press the arc operating strip 652 protruding outward from the guide groove 723 toward the guide groove 723. Then, the arc operating strip 652 is elastically deformed and the engaging piece 654 is disengaged from the first or second locking grooves 725 and 726, so that the shutter cylinder 60 can be rotated. By operating the operating lever 642 in this state, the posture of the shutter cylinder 60 can be changed.

  FIG. 18 is a partial cross-sectional explanatory view of the toner container 20 in a left side view for explaining the operation of the lock structure of the shutter cylinder 60. FIG. 18A shows the shutter cylinder 60 in the closed posture T1. FIG. 18B shows a state in which the shutter cylinder 60 is being changed from the closed posture T1 to the open posture T2, and FIG. 18C shows a state in which the shutter cylinder 60 has been changed to the open posture T2. Each state is shown. The direction display by Y in FIG. 18 is the same as in FIG. 1 (−Y: forward, + Y: backward).

  First, as shown in FIG. 18A, in a state in which the shutter cylinder 60 is set to the closed posture T1 (that is, a state before the toner container 20 is attached to the printer 10), the shutter cylinder of the shutter cylinder 60 is provided. The toner discharge outlet 614 of the body 61 is in a state of facing backward. For this reason, the toner in the container main body 31 is not led out to the outside through the toner discharge port 321 of the shutter mounting cylinder 32.

  Further, in this state, the engagement piece 654 at the tip of the lock member 65 provided in the shutter cylinder 60 is fitted and locked in the first locking groove 725 provided in the peripheral plate 722 of the cover lid 70. . As a result, the shutter cylinder 60 is locked, so that the closing posture T1 of the shutter cylinder 60 becomes stable.

  Next, when the toner container 20 is mounted on the printer 10, the operation lever 642 is operated to supply toner in the container container 30 to the developing device 122. Prior to this operation, the guide groove of the cover lid 70 is operated. Reinforcing ribs 655 protruding outward from 723 (see FIG. 9) are pressed toward the cylinder center direction of the shutter cylinder 60. By doing so, the arc operating strip 652 is elastically deformed, whereby the engaging piece 654 is released from the first locking groove 725 and the lock is released, so that the shutter cylinder 60 can be rotated around the cylinder center.

  By operating the operation lever 642 in the counterclockwise direction around the cylinder center in this state, the shutter piece 60 has the engagement piece 654 in sliding contact with the inner surface of the peripheral plate 722 as shown in FIG. In this state, it turns counterclockwise.

  When the shutter cylinder 60 is rotated by approximately 90 °, the shutter cylinder 60 has an opening posture T2 in which the toner discharge port 614 corresponds to the toner discharge port 321 of the shutter mounting cylinder 32, as shown in FIG. The posture is changed. As a result, the inside of the toner filling chamber Z of the toner container 20 is brought into communication with the developing device 122 via the toner discharge port 614 of the shutter cylinder 60 and the toner discharge port 321 of the toner container 20. Accordingly, the toner in the toner container 20 can be supplied to the developing device 122.

  When the shutter cylinder 60 is changed to the open position T2, the elastically deformed arc operating strip 652 is restored to its original shape, so that the engaging piece 654 of the shutter cylinder 60 is engaged with the second locking of the peripheral plate 722. Fit into the groove 726. As a result, the opening posture T2 of the shutter cylinder 60 is locked.

  Next, when the toner container 20 that has become empty due to toner consumption is replaced with a new toner container 20, the shutter cylinder 60 that is set to the open position T2 is moved to the closed position T1 by operating the operation lever 642. Be changed.

  At this time, first, the reinforcing rib 655 is pressed and the engaging piece 654 fitted and locked in the second locking groove 726 is removed from the second locking groove 726 and the lock is released. Subsequently, the operation lever 642 is operated in the counterclockwise direction. By this operation, the shutter cylinder 60 is rotated counterclockwise while the engagement piece 654 is in sliding contact with the inner surface of the peripheral plate 722. When the shutter cylinder 60 is rotated by approximately 90 °, the posture of the shutter cylinder 60 is changed to the closing posture T1, and the engaging piece 654 is fitted into the first locking groove 725, whereby the closing posture T1 of the shutter cylinder 60 is locked. The

  Accordingly, even when the old toner container 20 removed from the printer 10 is handled for the recovery operation when the toner container 20 is replaced with a new one, the occurrence of inconveniences such as residual toner leaking from the toner container 20 can be reliably prevented. Can do.

  As described above in detail, the toner container 20 according to the present embodiment is detachably attached to the apparatus main body 11 of the printer 10 in order to supply toner to the developing device 122 built in the printer 10. The container container 30 having the toner discharge port 321, the toner transport screw 51 for transporting the toner in the container container 30 toward the toner discharge port 321, and the toner discharge whose installation position is set to correspond to the toner discharge port 321 And a shutter cylinder 60 having an outlet 614 in the peripheral wall.

  Then, by attaching the toner container 20 to the apparatus main body 11 of the printer 10, the toner discharge port 614 of the shutter cylinder 60 is set at a position corresponding to the toner discharge port 321 of the container container 30. That is, the posture of the shutter cylinder 60 is set to the open posture T2.

  In this state, the shutter cylinder 60 is rotated around the cylinder center so that the toner discharge outlet 614 faces the toner discharge port 321 of the container container 30, and the toner conveying screw 51 is driven in this state, whereby the container container 30 is driven. The toner inside is conveyed by the toner conveying screw 51 and reaches the toner outlet 614. Then, the toner is supplied to the developing device 122 through the toner discharge outlet 614 and the toner discharge port 321.

  An escape hole 622 is provided in the peripheral wall of the shutter cylinder 60 on the upstream side in the toner conveyance direction from the toner discharge outlet 614 to allow the toner fed into the shutter cylinder 60 by the driving of the toner conveyance screw 51 into the container container 30. ing. Part of the toner carried into the shutter cylinder 60 is discharged through the toner discharge port 614 of the shutter cylinder 60 and the toner discharge port 321 of the container container 30, and the remaining part passes through the escape hole 622 and enters the container container 30. Returned. Therefore, even if the toner is pushed into the shutter cylinder 60 by the toner conveying screw 60, the toner is prevented from being agglomerated in the vicinity of the entrance of the shutter cylinder 60, and the toner can be discharged stably over a long period of time. it can.

  A shutter cylinder 60 is rotatably attached to the left side plate 314 of the container container 30. As a result, the toner conveying screw 51 is pivotally supported by the left plates 314 facing each other. As a result, the shaft support state of the toner conveying screw 51 is extremely stable.

  Further, on the entrance side of the shutter cylinder 60, a locking cylinder body 62 is provided as a distal end cylinder portion provided with a locking claw that performs a locking operation by elastically deforming a part of the shutter cylinder 60. The cylindrical body 62 is provided. In other words, the locking cylinder 62 is shared as a portion where the escape hole 622 is provided and a portion where a locking claw for mounting the shutter cylinder 60 on the side wall of the container container 30 is provided. Therefore, the structure of the shutter cylinder 60 is simplified and the shutter cylinder 60 is made compact compared to the case where these are provided in separate portions.

  The shutter cylinder 60 has a ring seal 66 that is fitted on the outer periphery thereof. For this reason, it is possible to effectively prevent the toner in the container container 30 from leaking outside through the peripheral surface of the shutter cylinder 60. Further, as compared with a sealing method in which a face seal is interposed at the edge of the shutter cylinder 60, reliable sealing performance can be obtained.

  Further, the left side plate 314 of the container container 30 is provided with a shutter mounting cylinder 32 that communicates with the inside of the container container 30 and has a toner discharge port 321 opened. The shutter cylinder 60 is connected to the shutter mounting cylinder 32. It is rotatably inserted. For this reason, by inserting the shutter cylinder 60 into the shutter mounting cylinder 32 provided on the left plate 314 of the container container 30 so as to be rotatable, the mounting state of the container container 30 on the left plate 314 can be stabilized. it can.

  The toner transport screw 51 is provided with a reverse spiral stirring fin 513 having a spiral shape opposite to the spiral shape of the spiral blade formed on the toner transport screw 51 at a position on the back side in the shutter mounting cylinder 32. . At this time, of the toner carried into the shutter cylinder 60, the toner that is not discharged from the toner discharge outlet 614 and goes to the back side of the shutter cylinder 60 is directed toward the toner discharge outlet 614 by the rotation of the reverse spiral stirring fin 513. To be sent. Therefore, the toner can be discharged more smoothly from the toner discharge outlet 614.

  One surface 610 of the shutter portion 61 of the shutter cylinder 60 on the side where the toner discharge outlet 614 is provided is a reduced diameter portion formed by reducing the diameter, and a seal pad 67 is attached to the reduced diameter portion. Yes. For this reason, when the toner in the container container 30 is supplied to the developing device 122, the toner leaks to the outside from the gap between the shutter cylinder 60 and the left plate 314 of the container container 30 due to the sealing action by the seal pad 67. Can be prevented.

  The shutter cylinder 60 is integrally provided with a lock member 65 that locks the rotation of the shutter cylinder 60. For this reason, both when the shutter cylinder 60 is set to the open posture T2 or the closed posture T1, the lock member 65 prevents the shutter cylinder 60 from rotating, and the set shutter cylinder 60 open posture T2 is set. In addition, the closing posture T1 can be stabilized. Furthermore, since the lock member 65 is provided integrally with the shutter cylinder 60, the number of parts can be reduced.

  Furthermore, the shutter cylinder 60 has a base end flange 611 that is in sliding contact with the inner peripheral surface of the shutter mounting cylinder 32 of the container container 30, and faces the mounting direction of the shutter cylinder 60 from the base end flange 611 to the shutter mounting cylinder 32. A guide rib 615 extending downward is provided. For this reason, when the shutter cylinder 60 is mounted on the left plate 314 of the container container 30, the shutter cylinder 60 is inserted into the left plate 314 so that the shutter cylinder 60 is mounted in the mounting direction on the left plate 314. It is guided by the guide rib 615 extending downwardly toward the front. Thus, the shutter cylinder 60 is smoothly inserted into the shutter mounting cylinder 32 without the base end flange 611 colliding with the edge of the shutter mounting cylinder 32. Therefore, the workability of assembling the shutter cylinder 60 to the shutter mounting cylinder 32 can be improved.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and the following modified embodiment can be adopted.

  (1) In the above embodiment, the printer 10 for color printing has been described as an example of the image forming apparatus to which the toner container 20 according to the present invention is applied. However, the printer 10 may be for monochrome printing. The image forming apparatus is not limited to a printer, and may be a copying machine or a facsimile apparatus.

  (2) In the above embodiment, an example in which the operation lever 642 is operated manually is shown. Instead, a guide member for guiding the rotation operation of the operation lever 642 is disposed on the container storage chamber Q side, and when the shutter cylinder 60 is inserted into the container storage chamber Q, the operation lever 642 is guided by the guide member. While the posture is automatically changed from the closed posture T1 to the open posture T2, when the container is taken out from the container storage chamber Q, the operation lever 642 is guided in the reverse direction by the guide member and automatically changed from the open posture T2 to the closed posture T1. You may make it change an attitude to. Accordingly, it is not necessary to manually operate the operation lever 642, and the detachability workability of the toner container 20 with respect to the apparatus main body 11 is improved.

  (3) In the above embodiment, the operation lever 642 may be covered with a cap having a shape suitable for manual operation in order to make the operation lever 642 easier to operate manually.

  (4) In the above-described embodiment, the shutter cylinder 60 inserted into the shutter mounting cylinder 32 is prevented from coming off when the locking claw 621 b abuts against the annular protrusion 322 of the shutter mounting cylinder 32. Instead of this, the end surface of the circular closing portion 63 of the shutter cylinder 60 may be covered with the cover lid 70, thereby preventing the shutter cylinder 60 from coming off. By doing so, it is not necessary to provide the locking cylinder 62 provided with the locking claw 621 and the escape hole 622 in the shutter cylinder 60, and the shutter cylinder 60 can be further shortened. In this case, the opening on the right surface side of the shutter cylinder 61 of the shutter cylinder 60 serves as an escape hole for allowing toner to escape.

  (5) In the above embodiment, an example in which the handle recess 38 provided in the lid 35 is provided on the driving force transmission side of the toner container 20 (the side where the conveyance gear 53 is provided) has been described. However, the handle recess 38 may be provided on the shutter side where the shutter cylinder 60 is provided, or may be provided in the center in the longitudinal direction.

  (6) In the above embodiment, the example in which the two escape holes 622 provided in the locking cylinder 62 of the shutter cylinder 60 are opposed to each other in the radial direction is shown. However, there may be one escape hole 622 or three or more.

  (7) In the above embodiment, an example in which the handle is recessed in the lid body 35 has been shown, but a handle convex portion bulged from the lid body 35 may be used.

  (8) In the above embodiment, since the toner container 20 is attached to and detached from the apparatus main body 11 from above, a handle recess 38 is provided in the lid 35 of the container container 30 to correspond to this. Yes. However, when the toner container 20 is to be attached and detached from the side surface of the apparatus main body 11, the handle recess 38 may be provided on the container main body 31 side of the container container 30.

  (9) In the above embodiment, the three support legs 33 are illustrated, but the support legs 33 may be four or more or less than three. However, when the number of support legs 33 is less than 3, support portions such as support protrusions for supporting the bottom plate of the container container 30 (the arc bottom plate 311 in the above embodiment) on the partition plate 18 side of the apparatus main body 11. It is necessary to provide.

  (10) In the above-described embodiment, the cross shaft 42 is employed as the stirring shaft for supporting the stirring blade 45 on the agitator 40. However, the cross shaft 42 may be a normal cylindrical shaft, and the sectional view may be It may be a square angular axis.

  (11) In the above embodiment, only one stirring blade 45 is attached to the cross shaft 42 of the agitator 40, but a plurality of stirring blades 45 may be attached to the cross shaft 42.

1 is an external perspective view showing an embodiment of a printer to which a toner container according to the present invention is applied, (A) is a perspective view seen from the right rear, and (B) is a perspective view seen from the left rear. It is. 2A and 2B are perspective views illustrating a state in which the paper discharge tray is removed from the apparatus main body in the printer illustrated in FIG. 1, in which FIG. 1A is a perspective view viewed from the right rear, and FIG. 2B is a perspective view viewed from the left rear. is there. It is explanatory drawing of the cross sectional view seen from the left surface side which shows the internal structure of a printer. FIG. 3 is a partially cutaway exploded perspective view showing an embodiment of a toner container according to the present invention. FIG. 5 is a partially cut-out assembly perspective view of the toner container shown in FIG. FIG. 5 is a perspective view of the toner container shown in FIG. It is the VII-VII sectional view taken on the line of FIG. It is the VIII-VIII sectional view taken on the line of FIG. FIG. 6 is a perspective view for explaining a toner filling operation into a toner container. FIG. 6 is a perspective view illustrating a state where a toner container is held. It is the perspective view which looked at these from the front lower right, paying attention to the relative positional relationship of an agitator and a conveyance member. It is a partially cutaway perspective view showing an embodiment of a shutter cylinder, and shows a state in which the shutter cylinder is set to a closed posture. FIG. 13 is a perspective view showing a state in which the shutter cylinder shown in FIG. 12 is set to an open posture. (A) is a sectional view taken along line XIII (A) -XIII (A) in FIG. 12 (A), and (B) is a sectional view taken along line XIII (B) -XIII (B) in FIG. 13 (A). is there. It is the XV-XV sectional view taken on the line of FIG. It is a perspective view showing one embodiment of a cover lid, and shows the state just before a cover lid is attached to a left board. FIG. 17 is a perspective view illustrating a state in which the cover lid illustrated in FIG. 16 is attached to the left side plate, and illustrates a state in which the shutter cylinder is set in an open posture (note that the shutter cylinder is in a closed posture in a circle). Shows the configured state). 4A and 4B are partial cross-sectional explanatory views of the toner container in a left side view for explaining the operation of the shutter cylinder lock structure, in which FIG. 5A shows a state in which the shutter cylinder is set to a closed posture, and FIG. The state in which the posture is being changed from the open position toward the open posture, (C) shows the state in which the posture has been changed to the open posture.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Printer 11 Apparatus main body 12 Image formation part 13 Fixing part 14 Paper storage part 15 Toner replenishment part 20 Toner container 30 Container container 31 Container main body 314 Left side plate (side wall)
316d Arc-shaped protrusion (second engagement portion (engagement portion))
32 Shutter mounting cylinder (cylindrical receiving part)
321 Toner discharge port 322 annular protrusion (first engagement portion (engagement portion))
50 Conveying Member 51 Toner Conveying Screw 60 Shutter Cylinder 61 Shutter Unit 610 Single Side (Reduced Diameter)
614 Toner discharge outlet 615 Guide rib 621 Locking claw 633 Shaft support hole (bearing in shutter cylinder)
64 Operating portion 65 Lock member 66 Ring seal 67 Seal pad R1 Closed posture R2 Opened posture S1 Closed posture S2 Opened posture T1 Closed posture T2 Opened posture Q Container storage chamber

Claims (9)

A toner container for supplying toner to the developing device;
A container for storing the toner and having a toner outlet;
A toner conveying screw for conveying the toner in the container toward the toner discharge port;
A shutter cylinder having a toner discharge port positioned on the peripheral wall so as to correspond to the toner discharge port;
A part of the toner conveying screw is inserted into the shutter cylinder,
A peripheral hole on the upstream side of the toner discharge direction of the shutter cylinder in the toner conveyance direction is provided with an escape hole through which the toner sent into the shutter cylinder by driving the toner conveyance screw is released into the container container. A featured toner container. The shutter cylinder is attached to a side wall of the container container so as to be rotatable around a cylinder center, and a part of the shutter cylinder is elastically deformed on the toner inlet side to perform a locking operation with respect to the container container. A tip cylinder with a locking claw is provided,
The toner container according to claim 1, wherein the escape hole is provided in the tip tube portion.   The toner container according to claim 1, wherein the shutter cylinder has a ring seal on an outer periphery thereof. On the side wall of the container container, a cylindrical receiving portion having the toner discharge port opened is provided.
The toner container according to claim 1, wherein the shutter cylinder is rotatably inserted into the cylindrical receiving portion. The toner conveying screw includes a screw shaft and a spiral blade mounted on the screw shaft, and the screw shaft is supported by a bearing in the shutter cylinder,
5. The toner container according to claim 1, wherein the spiral blade is provided up to a position before the toner discharge port on the screw shaft in a state of being inserted into the shutter cylinder.   The toner container according to claim 5, wherein a reverse spiral blade having a spiral shape opposite to the spiral shape of the spiral blade is provided at a position beyond the toner discharge port on the screw shaft. The shutter cylinder has a reduced diameter portion formed by reducing the diameter of a peripheral portion of the toner discharge outlet;
The toner container according to claim 1, wherein a seal pad is attached to the reduced diameter portion.   The toner container according to claim 1, wherein the shutter cylinder is integrally provided with a lock member that locks the rotation of the shutter cylinder. The shutter cylinder is
A flange in sliding contact with the side wall of the container container;
A guide rib extending downward from the flange toward the mounting direction of the shutter cylinder on the side wall;
The toner container according to claim 1, further comprising:

Images