JP2005157158A - Screen apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a screen apparatus capable of surely and satisfactorily supporting supporting shafts by simple constitution without applying excess working to supporting brackets. <P>SOLUTION: In the screen apparatus constituted so that the supporting shafts 7A, 7B for rotatably supporting a winding roll 6 for winding a screen are arranged so as to be partially projected from both the ends of the winding roll 6 in the longitudinal direction, the projected ends of the supporting shafts 7A, 7B are inserted into and supported by through holes 5A, 5A of a pair of right and left supporting brackets 5, 5 and the screen is freely wound and drawn out by rotating the winding roll 6, at least one of the supporting shafts 7A, 7B is constituted so as to be freely moved in the longitudinal direction of the winding roll 6 and energized toward the projected side by an elastic member 19. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention provides a support shaft for rotatably supporting a winding roll for winding a screen in a state in which a part thereof protrudes from both longitudinal ends of the winding roll, and the protruding end of the support shaft It is related with the screen apparatus which comprises the said screen so that winding is possible by inserting in the through-hole of a left-right paired support bracket, making it support, and rotating the said winding roll.

In particular, in a screen device equipped with a projection screen in the casing, there is a case where it is desired to replace the screen with a different fabric. In that case, one of the left and right support brackets screwed in the casing is removed. As a result, the spindle of the winding roll on which the screen is wound can be pulled out. After that, insert the protruding end of one spindle of the take-up roll on which the new screen is taken up into the through hole of the support bracket on the side screwed into the casing, and then penetrate the removed support bracket. The replacement operation of the screen is completed by inserting the protruding end of the other support shaft into the hole and screwing the support bracket to the casing again.
However, the above method requires the work of removing the support brackets one by one and then inserting the protruding end of the support shaft and the work of screwing the support brackets removed to the casing after the work is completed. It was such a work.
Therefore, in order to be able to easily and quickly replace the screen without removing the support bracket, an inverted U-shape for inserting and receiving a flange portion provided at the tip of the support shaft on the inner surface of the support bracket from below is received. The support member is screwed, and an arc-shaped bearing portion capable of supporting the flange portion inserted from below is supported on the upper end portion of the support member so that it can swing around the horizontal axis and is supported by a leaf spring. The flange portion is inserted from the lower end opening of the support member by being provided in a state of being biased in an inclined posture away from the inner surface of the support member so as to close the flange portion guide path formed by When the bearing part is swung so as to approach the inner surface of the support bracket against the urging force of the leaf spring, when the flange part gets over the bearing part, the bearing part is moved to the leaf spring. Projects into the flange the guide path side is adapted to hold the lower end of the support shaft at the bearing portion by the biasing force (e.g., see Patent Document 1.).
JP 2002-174084 A

Since the structure of Patent Document 1 has a configuration in which the support shaft is abutted and supported by a swinging (movable) bearing portion, the support shaft cannot be firmly fixed. Not only can it be performed smoothly and stably, but a large load (load) is applied to the bearing when the screen is pulled out, which may damage the bearing in some cases, and is actually heavy. It cannot be used for the screen. In order to prevent damage, it may be possible to increase the size of the support bracket and the bearing. However, a heavy screen device is not preferable because it further increases the weight.
In addition, it is not only troublesome to process the support shaft into a shape with a flange at the tip of the shaft, but also to mount a large number of parts such as support members, bearings, leaf springs, etc. on the support bracket, as well as an increase in the number of parts There was a room for improvement.

  In view of the above-described situation, the present invention intends to provide a screen device that can support the support shaft reliably and satisfactorily with a simple configuration without adding extra processing to the support bracket. is there.

In the screen device of the present invention, in order to solve the above-described problems, a part of the left and right support shafts for rotatably supporting a winding roll for winding the screen is respectively provided from both longitudinal ends of the winding roll. Provided in a protruding state, the protruding ends of the left and right support shafts are inserted and supported in the through holes of a pair of left and right support brackets, respectively, and the screen can be wound and pulled out by rotating the winding roll The screen device configured as described above is characterized in that at least one of the support shafts is movable in the longitudinal direction of the take-up roll and urged toward the protruding side by an elastic member.
When attaching the take-up roll to the support bracket, after inserting one support shaft into the through-hole of one support bracket, the other support shaft is resisted against the biasing force of the elastic member and the support shaft is taken up by the take-up roll. The projecting end of the support shaft can be moved on the inner surface side of the other support bracket, and the support end is supported by the biasing force of the elastic member by aligning the projecting end of the support shaft with the position of the through hole. The shaft moves to the protruding side, and the protruding end of the support shaft can be inserted into the through hole. If both the left and right support shafts are movable in the longitudinal direction of the take-up roll and are urged toward the protruding side by an elastic member, there is no need to check each support shaft on the first insertion side. Thus, the work of attaching the take-up roll to the support bracket can be performed more quickly.
The screen device according to claim 1.
Further, a coil spring is disposed between one end side of the one support shaft and the rotating body provided on the other end side of the support shaft so as to be integrally rotatable with the take-up roll, and the return of the coil spring is provided. In order to move the second rotating body rotating in the axial direction on the support shaft by rotating the winding roll by using a force so that the screen can be wound up. And the screen winding completion position of the winding roll is regulated by contacting the second rotating body that moves the screw part by the rotation of the winding roll toward the winding side. A contact portion is provided on the support shaft so that the second rotating body is brought into contact with the contact portion and an initial winding biasing force is applied to the coil spring. It can be packaged in an integrally rotated state across the rotating body, and Preparative provided interior capable cylindrical member integrally rotating state on the roll may be configured to screen for up roll mechanism.
In the state where the initial winding biasing force is applied to the coil spring as described above, the cylindrical body is externally and rotatably mounted across the rotating body and the second rotating body, so that the return force from the coil spring is applied to the rotating body. However, since the second rotating body is in contact with the protruding portion, the second rotating body is in a state in which it cannot rotate, and the rotation of the cylindrical body is the first. It will be blocked by the two-rotor, and the state in which the initial winding biasing force is applied to the coil spring can be maintained. In this state, the screen mounting operation can be completed by mounting the take-up roll and supporting the both ends of the support shaft on the left and right support brackets. The winding roll rotates by pulling the wound screen downward (either horizontal or diagonal) against the biasing force of the spring, and this rotational force rotates through the cylindrical body for the second rotation. It is transmitted to the body, and the second rotating body moves to the side opposite to the side that contacts the contact portion while rotating.
Further, a brake means long in the longitudinal direction of the take-up roll is provided on the take-up roll side of the other (remaining) support shaft opposite to the support shaft provided with the screen take-up roll mechanism. A casing may be fitted in the winding roll so as to be movable, and the casing may be urged to move outward from the winding roll by the elastic member.
The elastic member is a coil spring, and the outer side is opened to receive and accommodate the coil spring at one end of the winding roll so that a repulsive force acts outward in the longitudinal direction of the winding roll. And a receiving part that compresses the coil spring in contact with the outer side end of the coil spring received in the receiving member, and is wound from the outer periphery of the receiving part. A movable member comprising a cylindrical portion that extends inward of the take-up roll to cover a part of the side portion of the coil spring and that is slidably guided to the inner surface of the side wall portion of the housing member is provided in the housing member. The support shaft may protrude from the outer surface of the receiving portion of the housing member.
Moreover, you may provide the retaining means for preventing that the said casing slips out to the winding roll longitudinal direction outer side.

  By supporting at least one of the support shafts in the longitudinal direction of the take-up roll and urging the projection side by an elastic member, the support shaft is resisted against the urging force of the elastic member. It is possible to quickly insert the support shaft into the through-hole by simply moving the shaft to the take-up roll side and aligning the protruding end of the support shaft to the through-hole position. It is not necessary to add a large number of parts or to attach a large number of parts, and the cost increase can be suppressed. Further, the support shaft can be removed from the through hole only by pushing and moving the support shaft to the winding roll side against the elastic biasing force of the elastic member, and in particular, the screen can be replaced quickly. And since it is the structure which supports a spindle in the through-hole of the support bracket which was the most excellent also in intensity | strength, a support bracket can be favorably supported, without causing a deformation | transformation and damage of a support bracket.

  The first roll biasing force is applied to the coil spring while the second rotating body is in contact with the contact portion for regulating the screen winding completion position of the winding roll, and then the cylindrical body is rotated. By simply attaching the cylindrical body to the body and the second rotating body, the state in which the initial spring biasing force is applied to the coil spring can be securely held, and the screen can be used as it is. As a matter of course, the replacement work can be easily and quickly performed, and it is advantageous in terms of the work surface that even an unskilled person can work easily. In addition, the screen winding roll mechanism with high reliability can be provided without unintentionally unwinding the initial winding of the coil spring.

A brake means long in the longitudinal direction of the take-up roll is provided on the take-up roll side opposite to the support spindle provided with the screen take-up roll mechanism, and the casing of the brake means can be freely moved into the take-up roll. And another sliding contact guide member for stably moving the support shaft is provided in the take-up roll by urging the casing to move outward from the take-up roll by the elastic member. Becomes unnecessary, and the cost increase can be suppressed. Therefore, the casing of the brake means is stably slidably moved and guided in the take-up roll and the support shaft is moved, so that the product value with no operability and malfunction can be achieved.
By providing a retaining means for preventing the casing from slipping outward in the longitudinal direction of the take-up roll, when taking up the take-up roll having the support shafts at both ends, or the take-up roll When the support shaft is inserted into the left and right brackets, it is possible to prevent the support shaft from unexpectedly coming off the winding roll, which is advantageous in terms of handling.

  One end of the take-up roll is provided with a bottomed cylindrical receiving member that is open on the outer side in order to receive and receive the coil spring so that a repulsive force acts outward in the longitudinal direction of the take-up roll. A receiving portion that contacts the outer side end of the coil spring housed in the member and compresses the coil spring, and a side portion of the coil spring that extends from the outer peripheral edge of the receiving portion to the inner side of the winding roll A movable member comprising a cylindrical portion that covers a part of the housing member and is slidably guided on the inner surface of the side wall portion of the housing member is provided in the housing member, and a support shaft is provided on the outer surface of the receiving portion of the housing member. Thus, the cylindrical portion can be slidably guided to the inner surface of the side wall portion of the housing member when moving in the longitudinal direction of the take-up roll of the support shaft, and the support shaft can be moved stably, so that the operability and operation can be performed. By making the product value high without defects That.

  FIG. 1 shows a screen device, and the orientation of the projection screen 1 taken up by a take-up roll 6 constituting the screen device is pulled downward to change the posture to a use posture that allows projection of images from a projector or the like. The state is shown (in the figure, only the left side is shown in the front view). Reference numeral 2 shown in FIG. 1 denotes a bar for regulating the winding position of the screen 1 wound and housed in the casing 4 indicated by a two-dot chain line by contacting the opening of the casing 4. A handle 3 is attached approximately in the center in the direction. Note that the restriction of the winding position of the screen 1 is supplementarily performed by the bar 2 and is actually performed by the second rotating body 10 described later, and the bar 2 is provided at the opening of the casing 4. You may make it stop just before touching. Therefore, the casing 4 can be omitted. Here, the screen device is fixed to the wall, but the screen device may be fixed to the ceiling.

  As shown in FIGS. 1 and 2 (a) and 2 (b), the screen device has a pair of left and right supports fixed by screws (may be welded or the like) at both longitudinal ends in a casing 4 that is long in the left and right direction. Brackets 5, 5 and cylindrical winding metal 6 (which may be made of plastic having substantially the same strength as metal) that can wind and pull out the screen 1, and the winding roll And a pair of left and right support shafts 7A, 7B partially projecting outward from both ends of the take-up roll 6 in order to support 6 in a rotatable manner, and through holes 5A formed in the support brackets 5, 5. , 5A so that the support shafts 7A, 7B can be inserted without removing the support brackets 5, 5.

The one supporting shaft 7A (left side in front view) will be described. As shown in FIGS. 2 (a) and 2 (b), the end opening is closed and attached to one end of the cylindrical winding roll 6. An end cap 17 having a bottomed cylindrical shape for forming the concave portion 17A for use is fitted in, and the outer side is opened in a state in which a part protrudes outward in the concave portion 17A of the end cap 17. A bottom cylindrical housing member 18 is fitted inside, and a coil spring 19 as an elastic member is housed in the housing member 18 so that a repulsive force acts outward in the longitudinal direction of the take-up roll. A disc-shaped receiving portion 20 that contacts the outer end of the coil spring 19 accommodated in the accommodating member 18 and compresses the coil spring 19, and a winding roll 6 from the outer periphery of the receiving portion 20. The movable member 23 includes a cylindrical member 21 that extends inwardly to cover a part of the side portion of the coil spring 19 and that is slidably guided by the side wall portion inner surface 18A of the accommodating member 18. One end of the support rod 7A having a square shape and a rod shape is connected to the outer surface of the receiving portion 20 of the housing member 18. 24 shown in the figure is a lid provided on the inner surface with a threaded portion that engages with a threaded portion formed on the side surface of the projecting portion of the accommodating member 18, and that the receiving portion 20 moves outward of the accommodating member 18. Although contact is prevented, it may be omitted.
The other support shaft 7B (right side as viewed from the front) will be described. As shown in FIGS. 2A and 2B, the other end of the cylindrical winding roll 6 has a support shaft at the center. A through hole 25A for fitting and supporting 7B is formed, and an end cap 25 having a circular outer shape for closing the end opening is fitted therein, and the support shaft 7B is inserted into the through hole 25A of the end cap 25. A part of it is penetrated and fixed in a state of protruding outward from the take-up roll 6. The various components shown in the figure may be made of any material such as metal or plastic having substantially the same strength as metal.
Therefore, in order to support the pair of left and right support shafts 7A and 7B through the through holes 5A and 5A of the support brackets 5 and 5, first, the right support shaft 7B is inserted into the through hole 5A of the right support bracket 5. Next, the left support shaft 7A is moved to the position of the through hole 5A of the left support bracket 5 in a state where the left support shaft 7A is pushed by a finger against the elastic biasing force of the coil spring 19 (see FIG. 2B). When the finger is released from the support shaft 7A, the support shaft 7A is moved to the protruding side by the elastic biasing force, and the support shaft 7A is inserted into the through hole 5A (see FIG. 2A). When the support shafts 7A and 7B are removed from the support brackets 5 and 5, the left support shaft 7A is pushed away from the through-hole 5A so as to be separated from the support bracket 5 side and the right support shaft 7B. Can be removed from the support brackets 5 and 5 by pulling out the through-hole 5A. It should be noted that both of the pair of left and right support shafts 7A and 7B can be implemented with the left support shaft 7A.
1 and 2 (a) and 2 (b) show not only the case where the screen 1 is pulled out from the take-up roll 6, but also the case where the screen 1 is manually operated when taken up. As shown in FIGS. 5A and 5B, the winding roll 6 may be driven and rotated by the return biasing force of the coil spring 19 during winding, or the electric motor may be wound. For example, the screen 1 may be pulled out and wound using an electric force such as the above.

  FIGS. 3 to 6 show the main part of a screen device having another configuration, which will be described as a cylindrical shape for winding the screen 1 (having substantially the same strength as metal). The screen take-up roll mechanism A is placed on one of the left and right support shafts 7A and 7B (left side) of the support shaft 7A that protrudes outward from both ends of the take-up roll 6 (which may be made of plastic). And a casing K provided with brake means for causing the other (right side) support shaft 7B to slowly wind up the screen 1.

As shown in FIGS. 3 and 6, a cylindrical plastic made of metal (such as metal) provided on one end side of the left support shaft 7A and the other end side of the support shaft 7A so as to be integrally rotatable with the take-up roll 6. A coil spring 9 made of metal (may be made of plastic having substantially the same strength as metal) is disposed between the rotating body 8 made of another material), and the coil spring 9 is attached with a return. The screen 1 is configured to be freely wound by driving and rotating the winding roll 6 using a force. S shown in FIG. 3 is a one-way clutch that allows the take-up roll 6 to rotate only in the pull-out direction for pulling out the screen 1. However, if another stop mechanism is attached, the one-way clutch may be omitted. . The one-way clutch S has a substantially cylindrical shape that is long in the longitudinal direction of the take-up roll, but may have other shapes.
A second rotating body made of plastic in the shape of a disc that rotates with the rotation of the winding roll 6 on the other end side of the support shaft 7A (may be made of plastic having substantially the same strength as metal). A screw portion 11 for moving the shaft 10 in the axial direction is integrally formed (a screw portion formed separately may be fitted and fixed to the support shaft 7A), and the winding roll 6 is rotated toward the winding side. A double nut 12 serving as a contact portion for restricting the screen winding completion position of the winding roll 6 by contacting the second rotating body 10 that moves the screw portion 11 is used as the screw portion of the support shaft 7A. 11, and an end cap 13 made of plastic (or other material such as metal) is rotatably provided at the other end of the support shaft 7 </ b> A, and the second rotating body 10 is attached to the contact shaft 7 </ b> A. The coil 12 is brought into contact with the contact portion 12 and the coil In a state where the initial winding urging force is applied to the ring, it is externally wound over the rotating body 8, the second rotating body 10, and the end cap 13, and can be rotated integrally with the winding roll 6. The screen winding roll mechanism A is configured by providing a cylindrical body 14 made of metal (which may be made of plastic having substantially the same strength as metal).

  As shown in FIG. 4, the cylindrical body 14 has a larger outer diameter than the three parts having substantially the same outer diameter, that is, the rotating body 8, the second rotating body 10, and the end cap 13. In addition, the inner surface of the cylindrical member 14 contacts the outer peripheral surface of the three members 8, 10, 13 and protrudes inward to maintain the posture when the cylindrical body 14 is externally mounted and is axially In addition, a large number of long receiving portions 15 are provided at predetermined intervals in the circumferential direction, and are positioned between these two receiving portions 15 and 15 so as to protrude inward and to have a plate shape that is long in the axial direction. Are provided on the inner surface of the cylindrical body 14. Then, the cylindrical body 14 is projected by moving the cylindrical body 14 from the axial direction to the rotary body 8, the second rotary body 10, and the end cap 13 provided on the support shaft 7 </ b> A. The rotating body 8, the second rotating body 10, and the end cap 13 are provided with long grooves 8A, 10A, and 13A along the axial direction as engaged portions for engaging with 16 and allowing both to rotate. ing. The end cap 13 does not have to be formed on the end cap 13 without forming the long groove 13A. The exterior here refers to a case where a large number of receiving portions 15 of the cylindrical body 14 are in contact with the outer peripheral surfaces of the three members 8, 10, 13 and covered with no gaps (referred to as external fitting). However, it may be in a state where a large number of receiving portions 15 of the cylindrical body 14 are covered with some gaps without contacting the outer peripheral surfaces of the three members 8, 10, 13. A concave portion 14A along the axial direction is formed on the outer surface of the cylindrical body 14, and by projecting the casing 4 onto the cylindrical body 14, the inner surface of the casing 4 protrudes inward, and 4 A of convex parts formed along the axial direction engage with the recessed part 14A of the said cylindrical body 14, and the cylindrical body 14 rotates integrally with rotation of the casing 4. As shown in FIG. When the cylindrical body 14 rotates, the rotating body 8, the second rotating body 10, and the end cap 13 rotate integrally, and the second rotating body 10 moves in the axial direction by the screw portion 11 while rotating. It becomes.

  The procedure for assembling the screen take-up roll mechanism A will be described. First, one end of the coil spring 9 is penetrated and fixed to one end side of the support shaft 7A, and the other end is provided to the other end side of the support shaft 7A. The pair of grooves 8M and 8M formed in the body 8 are locked and held, and the parts K, 10, 12, and 13 are provided on the support shaft 7A, and at the same time, the cylindrical body 14 is inserted through the support shaft 7A. The state is set (see FIG. 3). The state in which the second rotating body 10 is in contact with the double nut 12 is confirmed. If the second rotating body 10 is not in contact, the second rotating body 10 is rotated and is in contact with the double nut 12. In this state, by rotating the rotating body 8 in a predetermined direction (H direction in FIG. 3) a predetermined number of times with the support shaft 7A fixed (non-rotating state), an initial winding urging force is applied to the coil spring 9. While the cylindrical body 14 is externally attached (extrapolated) to the rotating body 8, the second rotating body 10, and the end cap 13 while maintaining this imparted state, the protruding portion 16 of the cylindrical body 14 is provided with the long grooves 8A, 10A, By engaging with 13A, the tubular body 14 is rotated by the return force of the coil spring 9, but the second rotating body 10 cannot contact the double nut 12 and rotate. 14 is prevented from rotating, and the coil spring is initially wound. When the cylindrical body 14 is packaged (extrapolated) in the order of the rotating body 8, the second rotating body 10, and the end cap 13, a flange portion that protrudes from the side surface of the end portion of the end cap 13. The end face of the cylindrical body 14 comes into contact with the end face of 13F, and the exterior of the cylindrical body 14 is completed. Next, after the cylindrical body 14 is packaged, the winding roll 6 is packaged (extrapolated) as shown in FIG. 14, the rotating body 10, the second rotating body 10, and the end cap 13 can be rotated together, and the assembly of the screen winding roll mechanism is completed. The direction in which the take-up roll 6 is packaged (extrapolated) may be opposite to the direction shown in FIG. Then, the screen 1 is wound around the screen winding roll mechanism assembled in this manner, and then attached to the support bracket 5. The rotating body 8 may be rotated in the direction opposite to the H direction, but in this case, the positional relationship between the second rotating body 10 and the double nut 12 is reversed left and right.

As described above, the supporting shaft 5 of the screen winding roll mechanism assembled as described above is supported by the support bracket 5 and then the screen 1 is pulled out against the initial urging force of the coil spring 9. The winding roll 6, the cylindrical body 14, the rotating body 10, the second rotating body 10, and the end cap 13 rotate, and the coil spring 9 is twisted to increase the winding biasing force, thereby stopping the pulling operation. It stops at that position by a stop mechanism (not shown). Thereafter, by releasing the stop mechanism for winding, the rotating body 10, the second rotating body 10, the end cap 13, the cylindrical body 14, and the winding roll 6 are rotated by the urging force of the coil spring 9, thereby causing the screen to rotate. 1 is wound, and the second rotating body 10 comes into contact with the double nut 12, so that the winding of the screen 1 is completed.
When the screen 1 is to be replaced with another screen 1 made of a different material, for example, the screen winding roll mechanism around which the screen 1 is wound is removed from the support bracket 5 and another screen 1 is wound. The replacement work can be completed simply by attaching the screen winding roll mechanism to the support bracket 5.

As shown in FIGS. 5 (a) and 5 (b), the casing K of the brake means fitted on the right support shaft 7B is housed in a movable state in the longitudinal direction of the take-up roll, and the casing K is stored. A bottomed cylindrical storage member 27 having a size capable of storing a coil spring 26 for projecting and urging outward is fitted into the take-up roll 6, and the coil spring is accommodated in the storage member 27. 26 is provided in a state where one end is in contact with the bottom plate portion 27A of the storage member 27 so that a repulsive force acts outwardly in the longitudinal direction of the take-up roll, and one end of the casing K is connected to the other end of the coil spring 26. The casing K is inserted into the storage member 27 in a contact state. The casing K is fitted with a cosmetic cylindrical cover member 28, but may be omitted. An inner side end portion of the winding roll 6 of the cover member 28 is extended inward from the end portion of the casing K so as to constitute a storage portion capable of storing a part of the coil spring 26, and the coil spring 26 can be extended and contracted smoothly.
By configuring in this way, the right support shaft 7B is moved to the left as shown in FIG. 5B against the elastic biasing force of the coil spring 26, so that the right support bracket 5 can be moved as described above. It is configured so that it can be inserted into the through hole 5A. When the support shaft 7B moves, the casing K of the brake means that is long in the winding roll direction serves as a sliding contact guide member, and the support shaft 7B moves smoothly.

  The one supporting shaft 7A (on the left side in the figure but may be on the right side or the left and right sides) may be configured as shown in FIGS. 7 (a) and 7 (b). That is, the outer peripheral edge of the end surface on the bracket side (the end surface on the free end side) is positioned outwardly toward the winding roll 6 side and is larger than the thickness of the bracket 5 (from the winding roll 6 side end to the bracket side). A taper surface (inclined surface) 7a having a dimension to the end) is formed, and the support shaft 7A is pushed only to the extent that the taper surface 7a contacts the through hole 5A of the bracket 5 (see FIG. 7B). The surface 7a can be slid in the direction of pulling out the support shaft 7A (downward in the figure). Although the configuration of other parts not illustrated in FIG. 7 is the same as that of FIG. 2, other configurations may be used.

  Moreover, you may comprise the said one spindle 7A (it is a left side in a figure, but a right side or both right and left sides may be sufficient) as shown to Fig.8 (a), (b). That is, the support shaft 7A has a double end composed of a distal end portion that is penetrated and supported by the through hole 5A and a base end portion that has a stepped portion 7D that can be brought into contact with the inner surface of the bracket 5 and has a diameter larger than that of the distal end portion. It has a shaft structure. Therefore, as shown in FIG. 8B, the right support shaft 7B is extracted from the through hole 5A of the right bracket 5 by moving the take-up roll 6 to the left bracket 5 side, and then the left support shaft is removed. The shaft 7A is extracted from the left bracket 5 so that the take-up roll 6 can be removed. Although the configuration of other parts not illustrated in FIG. 8 is the same as that of FIG. 2, other configurations may be used.

The cover member 28 shown in FIG. 5 may be configured as shown in FIGS. 9 and 10A and 10B. Although FIG. 5 shows the left support shaft 7B, FIGS. 9 and 10 (a) and 10 (b) explain the right support shaft 7A, and the left and right support shafts 7A and 7B. Good. In FIG. 5, the cover member 28 is configured from a cylindrical shape, but in FIGS. 9 and 10 (a) and (b), the cover member 28 is configured from a bottomed cylindrical shape in which an opening is formed only at one end in the longitudinal direction. A casing K having a left support shaft 7 </ b> A is fitted into the cover member 28, and then inserted into the storage member 27, as a retaining means for passing through a through hole 27 </ b> A formed in the bottom plate portion of the storage member 27. Screw 29 (which may be omitted in some cases) is screwed into a screwing portion 28A formed on the bottom plate portion of the cover member 28, and the coil spring 26 is connected to the inner surface of the bottom plate portion of the storage member 27 and the cover member. By arranging it between the outer surface of the bottom plate portion 28, as shown in FIG. 10 (a), the support shaft 7A is projected and urged to the outer side of the take-up roll 6, and the support shaft 7A or the casing is also urged. K to the inner side of the winding roll 6 coil spring 2 By operating push against the elastic biasing force of, as shown in FIG. 10 (b), are configured to be able to move the supporting shaft 7A inward side of the winding roll 6.
Further, instead of omitting the screw 29, as shown in FIGS. 11 and 12 (a) and 12 (b), the housing member 27 is provided with two long holes 27B along the longitudinal direction thereof (one place in the circumferential direction). Or may be three or more), and screwed portions that can be screwed with screws 30, 30 as retaining means inserted through the long holes 27B, 27B are provided at two locations in the circumferential direction of the cover member 28. Thus, the movement of the cover member 28 is restricted by the long holes 27B and 27B. Accordingly, as shown in FIG. 12A, the support shaft is supported by the elastic biasing force of the coil spring 26 disposed between the inner surface of the bottom plate portion of the storage member 27 and the outer surface of the bottom plate portion of the cover member 28 as described above. By projecting and urging 7A to the outer side of the winding roll 6, and pushing the supporting shaft 7A or the casing K toward the inner side of the winding roll 6 against the elastic urging force of the coil spring 26. As shown in FIG. 12 (b), the support shaft 7 </ b> A can be moved inward of the take-up roll 6. In addition, although the shape of the said casing K differs in the thing of FIG. 5 and the thing of FIGS. 9-12, the shape of the casing K may be shapes other than these. As described above, the screw 29 or 30 is referred to as a retaining means for preventing the casing K from slipping outward in the longitudinal direction of the take-up roll. The locking tool etc. which connect by a stop may be sufficient.

  The screen take-up roll mechanism of the present invention is particularly effective for a projection screen that needs to be replaced. However, the screen take-up roll mechanism can also be applied to a screen that is used for shielding or heat-insulating.

It is a schematic perspective view of the left side of the screen apparatus of the state which pulled out the screen. (A) is sectional drawing which shows the state which inserted both the support shafts of the winding roll in the left and right support bracket, (b) shows the state just before the left support shaft of the winding roll is inserted in the left support bracket. It is sectional drawing. It is a perspective view which shows the state just before assembling the winding roll mechanism for screens. It is a perspective view which shows the principal part of the winding roll mechanism for screens. It is sectional drawing which shows the internal structure of the right side support shaft with which the casing of the brake means was mounted | worn, (a) shows the state which the support shaft protrudes outside, (b) shows the elasticity of a coil spring. It shows a state where it is pushed inward against the urging force. It is a perspective view of the winding roll by which the winding roll mechanism for screens and the casing of the brake means were respectively provided on the left and right support shafts. (A) is sectional drawing of the principal part which shows the state which penetrated the left side spindle of another structure to the left side support bracket, (b) is the principal point which shows the state just before extracting the left axis from the left support bracket. It is sectional drawing of a part. (A) is sectional drawing which shows the state which penetrated both the support shafts of another structure of a winding roll to the right and left support bracket, (b) is the state which extracted the right support shaft from the right support bracket in (a) FIG. It is a disassembled perspective view which shows the other left side internal structure just before mounting | wearing with a storage member on the casing of a brake means. It is sectional drawing which shows the internal structure of the left side with which the casing of the brake means shown in FIG. 9 was mounted | worn by the storage member, (a) shows the state which the spindle protruded outside, (b) is a spindle Is pushed inward against the elastic biasing force of the coil spring. It is a disassembled perspective view which shows the other left side internal structure just before mounting | wearing with a storage member on the casing of a brake means. It is sectional drawing which shows the internal structure of the left side with which the casing of the brake means shown in FIG. 11 was mounted | worn with the accommodating member, (a) shows the state which the spindle protruded outside, (b) is a spindle Is pushed inward against the elastic biasing force of the coil spring.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Screen 2 Bar 3 Handle 4 Casing 4A Convex part 5 Support bracket 5A Through-hole 6 Winding roll 7A, 7B Spindle 8 Rotating body 8M Groove 8A, 10A, 13A Long groove 9 Coil spring 10 2nd rotating body 11 Screw part 12 Double Nut (contact part)
13F Flange portion 13 End cap 13A Long groove 14A Recess 14 Cylindrical body 15 Receiving portion 16 Protruding portion 17A Mounting recess 17 End cap 18A Side wall inner surface 18 Housing member 19 Coil spring 20 Receiving portion 21 Cylindrical portion 23 Receiving portion 23 Movable member 24 Cover body 25 End cap 25A Through hole 26 Coil spring 27 Storage member 27A Bottom plate part 27B Through hole 28 Cover member 29, 30 Screw A Screen winding roll mechanism K Casing S One-way clutch

Claims (5)

  The left and right support shafts for rotatably supporting the take-up roll for winding the screen are provided in a state in which a part protrudes from both longitudinal ends of the take-up roll, and the protruding ends of the left and right support shafts are provided. In the screen device configured to be inserted and supported in the through holes of the pair of left and right support brackets, and to be able to wind and pull out the screen by rotating the winding roll, A screen device characterized in that at least one is movable in the longitudinal direction of the take-up roll and urged toward the protruding side by an elastic member.   A coil spring is disposed between one end side of the one support shaft and a rotating body provided on the other end side of the support shaft so as to be integrally rotatable with the winding roll, and a return biasing force of the coil spring is provided. A screw for rotating the take-up roll so that the screen can be taken up and moving a second rotating body that rotates with the take-up roll in the axial direction on the support shaft. A contact portion for restricting a screen winding completion position of the winding roll by contacting the second rotating body that moves the screw portion by rotation of the winding roll toward the winding side. The rotating body and the second rotating body in a state in which a portion is provided on the support shaft and the second rotating body is in contact with the abutting portion and an initial urging force is applied to the coil spring. And can be packaged in an integrally rotated state, and the winding Provided interior capable cylindrical member integrally rotating state Lumpur, screen device according to claim 1, characterized by being configured to screen for up roll mechanism.   Brake means long in the longitudinal direction of the take-up roll is provided on the take-up roll side of the other support shaft opposite to the support shaft provided with the screen take-up roll mechanism, and the casing of the brake means is wound on the take-up roll. The screen device according to claim 2, wherein the screen device is fitted in a roll so as to be movable, and the casing is moved and urged outward by the elastic member by the elastic member.   The elastic member is a coil spring, and an outer side is opened to receive and house the coil spring at one end of the winding roll so that a repulsive force acts outward in the longitudinal direction of the winding roll. A bottom cylindrical housing member is provided, and a receiving portion that contacts the outer side end of the coil spring accommodated in the housing member and compresses the coil spring, and an outer peripheral edge of the receiving portion from the outer periphery of the winding roll. A movable member comprising a cylindrical portion extending inwardly to cover a part of the side portion of the coil spring and guided in sliding contact with the inner surface of the side wall portion of the housing member; The screen device according to claim 1, wherein the support shaft protrudes from an outer surface of the receiving portion of the housing member. 4. A screen device according to claim 3, further comprising a retaining means for preventing the casing from slipping outward in the longitudinal direction of the winding roll.

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