JP3674197B2 - Side registration device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a side registration apparatus that is used in an image forming apparatus such as an electrophotographic copying machine or a printer and aligns the side edges of paper.
[0002]
[Prior art]
Conventionally, in an image forming apparatus such as the above-described electrophotographic copying machine or printer, transfer paper is transferred from a paper feed tray or the like, and a toner image formed on a photosensitive drum is transported to a transfer unit, or an image is formed on one side. In order to form an image at an appropriate position on the transfer paper by aligning the side edges of the transfer paper when the transfer paper on which the toner image is formed is conveyed again to the transfer section of the photosensitive drum, the side registration device Is used.
[0003]
One of the side registration devices for aligning the side edges of the paper is a side guide plate disposed on the side of the paper transport path, and an inclined cross roller that transports the paper diagonally toward the side guide plate. There is a method to use.
[0004]
However, this cross-roller system has a problem in that depending on the type of paper, the paper may strike the side guide too strongly, and the leading edge or side edge of the paper may be buckled.
In order to avoid this, there are those disclosed in JP-A-6-278914 and JP-A-5-246484.
[0005]
The side registration apparatus according to the above-mentioned Japanese Patent Application Laid-Open No. 6-278914 is provided with a side guide plate provided in a side portion of the paper transport path in parallel to the paper transport direction and inclined with respect to the side guide plate. And a conveying means that is disposed opposite to the driving roller and is idler roller that is rotatable within a predetermined range from the opposed position, and that feeds the sheet obliquely toward the side guide plate. And the idler roller is set at the facing position until the leading end corner of the sheet contacts the side guide plate, and after the leading end corner of the sheet contacts the side guide plate, Rotating means for rotating the idler roller as the paper changes its direction along the side guide plate.
[0006]
Further, the paper feeding device according to the above-mentioned Japanese Patent Application Laid-Open No. 5-246484 is a paper feeding device that continuously transports paper to or from a processing station in the image processing apparatus in a preselected direction. A first cross roller to be driven, a second cross roller mounted for free rotation, and a force for forcing the engagement of the first and second cross rollers at a nip for receiving paper Means for applying a load to the roller and means for adjusting the normal force applied to the paper passing through the nip for receiving the paper by adjusting the force applied by the means for applying the load. .
[0007]
[Problems to be solved by the invention]
However, the conventional technique has the following problems. That is, in the case of the side registration apparatus according to the above-mentioned Japanese Patent Application Laid-Open No. 6-278914, the drive roller and the idler roller that are disposed to be inclined with respect to the side guide plate are configured to rotate, Is configured to absorb the reaction force when it hits the side guide plate by a rotating means such as a torsion spring. In this mechanism, the reaction force varies depending on the stiffness of each sheet. Since it is necessary, there is a problem that it is difficult to set a torsion spring or the like. Further, when the weight of the paper is large, the paper is not sent to the side guide plate, and there is a possibility that the side edges of the paper may not be aligned.
[0008]
Further, in the case of the paper feeding device according to the above-mentioned Japanese Patent Application Laid-Open No. 5-246484, the nip pressure applied to the roller can be adjusted by combining a solenoid, a linear motor and a spring. However, in the case of this mechanism, recent color image forming apparatuses can form color images with considerably high image quality. As art / coated paper used in the printing field in image forming apparatuses, it is necessary to use and transport paper that is considerably different from plain paper in basis weight, thickness, and surface condition. In the case of transporting a simple sheet, there is a problem that it may not be able to cope with the elastic deformation of the spring.
[0009]
Therefore, the present invention has been made to solve the above-mentioned problems of the prior art, and the object of the present invention is even in the case of different types of paper such as the coefficient of friction, basis weight, and thickness of the paper surface. An object of the present invention is to provide a side registration apparatus capable of aligning the side edges of paper.
[0010]
[Means for Solving the Problems]
That is, the invention described in claim 1 is inclined in a direction in which the side guide member attached to the side portion of the conveyance path in parallel with the conveyance direction, the drive roller driven by the motor, and the sheet are fed to the side guide member side. In the side registration device that feeds the sheet obliquely in the direction of the side guide member and aligns the side edges of the sheet by using the conveyance roller. At least one of the rollers A first roller member made of a material having a small friction coefficient and having a large diameter is provided integrally with both sides of the first roller member, and a first roller member made of a material having a large friction coefficient and having a diameter smaller than that of the first roller member. 2 roller members The combination is configured to change the pressing force on the paper according to the type of the paper.
[0012]
Further, the invention described in claim 2 is inclined in a direction in which the side guide member attached to the side portion of the conveyance path in parallel with the conveyance direction, the drive roller driven by the motor, and the sheet are fed to the side guide member side. In the side registration device that feeds the sheet obliquely in the direction of the side guide member and aligns the side edges of the sheet by using the conveyance roller. At least one of the rollers is made of the same material A first roller member having a large diameter and a second roller member provided integrally on both sides of the first roller member and having a diameter smaller than that of the first roller member. The combination is configured to change the pressing force on the paper according to the type of the paper.
[0013]
Furthermore, the invention described in claim 3 is inclined in a direction in which the side guide member attached to the side portion of the conveyance path in parallel with the conveyance direction, the drive roller driven by the motor, and the sheet are fed to the side guide member side. In a side registration device that feeds the paper obliquely in the direction of the side guide member and aligns the side edges of the paper, a plurality of the transport rollers are arranged. Of these plurality of transport rollers, at least one transport roller is At least one of the rollers constituting the conveying roller is provided integrally with a first roller member made of a material having a small friction coefficient and having a large diameter on both sides of the first roller member. A second roller member made of a large material and having a diameter smaller than that of the first roller member; and According to the type of paper, the nip with respect to the paper can be released.
[0014]
Furthermore, the invention described in claim 4 is such that the side guide member attached to the side portion of the conveyance path in parallel with the conveyance direction, the drive roller driven by the motor, and the sheet are fed to the side guide member side. In a side registration apparatus that includes a conveyance roller composed of a crossed roller that is mounted at an angle, and that conveys the sheet obliquely toward the side guide member by the conveyance roller to align the side edges of the sheet, the conveyance roller includes at least one conveyance roller. One is arranged with a different inclination angle from the other, and at least one of the plurality of transport rollers is: At least one of the rollers constituting the conveying roller is provided integrally with a first roller member made of a material having a small friction coefficient and having a large diameter on both sides of the first roller member. A second roller member made of a large material and having a diameter smaller than that of the first roller member; and According to the type of paper, the nip with respect to the paper can be released.
[0015]
[Action]
In the first aspect of the present invention, the roller member having a large diameter usually contacts the paper and transports the paper. However, when the force for pressing the roller against the paper is increased, the roller member having a large diameter is deformed and the friction is caused. A small roller member having a high coefficient contacts the paper to transport the paper, so that the paper transport force can be changed. Also, a wider conveying force can be obtained by using only the material of the roller member as compared with the case where the pressing force is changed.
[0016]
In the invention described in claim 2 above, the roller member having a large diameter usually contacts the paper and transports the paper. However, when the force pressing the roller against the paper is increased, the roller member having a large diameter is deformed. Since the roller member having a small diameter is also brought into contact with the sheet, the sheet is conveyed, so that the sheet conveying force can be changed.
[0017]
Furthermore, the invention described in claim 3 can change the conveying force of the sheet according to the type of the sheet by changing the number of conveying rollers to be niped to the sheet. A conveyance force can be obtained.
[0018]
Still further, in the invention described in claim 4, the amount of the paper to be obliquely fed in the direction of the side guide member is changed by selecting one of the conveying rollers niped with the paper having a different inclination angle. A wide conveying force can be obtained by setting the roller angle.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below based on the illustrated embodiments.
[0020]
FIG. 2 shows an embodiment of an image forming apparatus to which the side registration apparatus according to the present invention can be applied.
[0021]
In FIG. 2, reference numeral 1 denotes a main body of the image forming apparatus. A scanner unit 3 for reading an image of a document 2 is disposed at an upper end portion in the main body 1 of the image forming apparatus. In the upper part of the platen, there is a function as a document pressing member that presses the document 2 placed on the first platen glass 4 and automatic document feeding that transports the document 2 onto the second platen glass 5 at a constant speed. An automatic document feeder 6 having a function is disposed so as to be openable and closable with respect to the image forming apparatus main body 1.
[0022]
When the scanner unit 3 reads the image of the document 2 moving on the second platen glass 5 at a constant speed, the scanning optical system 7 constituting the scanner unit 3 stops at the position shown in FIG. In this state, the image of the document 2 is read. When the scanner unit 3 reads the image of the document 2 placed on the first platen glass 4, the scanning optical system 7 moves along the lower surface of the document 2 at a predetermined speed, and the document By scanning the entire surface of 2, the image of the document 2 is read.
[0023]
Thereafter, the document 2 read at the reading position on the second platen glass 5 is discharged onto a document discharge tray 9 provided below the document set tray 8 by a plurality of transport rolls.
[0024]
When the automatic document feeder 4 performs double-sided copying of the document 2, the document 2 on which the image on one side is read is not directly discharged onto the document discharge tray 9 by the transport roll, but the transport path switching member. By switching the transport path, the document 2 on which the image on one side is read is temporarily stored in the document temporary storage portion below the document discharge tray 9 by the transport roll, and then the document 2 is transported again with the front and back reversed. 2 is conveyed to the reading position on the second platen glass 5 and read by the image reading element 10 through the scanning optical system 7. Thereafter, the document 2 on which the images on the front and back surfaces are read is discharged with the surface of the document 2 facing down onto the discharge tray 9 through the U-turn path in a state where the front and back surfaces are reversed by the transport roll.
[0025]
As described above, by placing the original 2 in a fixed state on the upper end of the image forming apparatus main body 1, the first platen glass 4 having a large area for reading the image of the original 2, and A second platen glass 5 having a small area for reading an image of the document 2 while automatically conveying the document 2 at a constant speed is disposed. Further, as described above, an automatic document feeder 6 having a function as a document pressing member is disposed above the image forming apparatus main body 1 so as to be openable and closable. A document pressing member 11 made of an elastic member that presses the document 2 is provided at a position corresponding to the upper portion of the first platen glass 4.
[0026]
In the image forming apparatus, as shown in FIG. 1, the image information of the document 2 is read by the scanner unit 3 and the automatic document feeder 6 configured as described above. The image information of the document 2 read by the scanner unit 3 is stored in a temporary storage device (not shown), subjected to predetermined image processing as necessary, and then according to the image information subjected to the image processing. Image exposure is performed on the photosensitive drum 13 by a ROS 12 (Raster Output Scanner) to form an electrostatic latent image. The electrostatic latent image formed on the photosensitive drum 13 is developed by the developing device 14 to become a toner image, and then the toner image is transferred onto the copy paper 16 by the transfer charger 15. The copy paper 16 is fed with a predetermined size of paper from a plurality of paper trays 17, 18, 19, 20 accommodated in the lower part of the image forming apparatus main body 1, and feed sensors 21, 22, 23. , 24, and once transported to a resist roll 26 in front of the photosensitive drum 13 by a plurality of transport rolls 25 arranged in synchronization with the toner image formed on the photosensitive drum 13 by the resist roll 26. The photosensitive drum 13 is conveyed to the surface.
[0027]
The copy paper 16 onto which the toner image has been transferred from the photosensitive drum 13 is separated from the photosensitive drum 13 by the separation charger 27, and then conveyed to the fixing device 29 by the conveyance belt 28, and is heated by the fixing device 29. Then, the toner image is fixed on the copy paper 16 by the pressure and discharged onto the discharge tray 30 arranged outside the apparatus, and the image copying process is completed.
[0028]
The surface of the photosensitive drum 13 after the toner image transfer process is removed from the surface of the photosensitive drum 13 by a cleaning device 31 to prepare for the next copying process.
[0029]
Further, when performing double-sided copying with the image forming apparatus, the copy paper 16 with the image copied on one side is not directly discharged to the discharge tray 30, but is transferred to the paper reversing path 32 by switching the transfer path. Then, the image is copied on the back surface of the copy paper 16 by being conveyed again to the image forming unit below the photosensitive drum 13 through the conveyance path 33 with the front and back sides of the copy paper 16 being reversed. The paper 16 is discharged onto the discharge tray 30.
[0030]
In the image forming apparatus configured as described above, particularly when performing double-sided copying, when the sheet is conveyed again below the photosensitive drum 13 via the conveyance path 33 with the front and back sides of the copying sheet 16 reversed, the copying sheet In some cases, the position in the direction orthogonal to the conveyance direction 16 may deviate from an appropriate position, or the copy paper 16 may tilt.
[0031]
In view of this, in the image forming apparatus, a side registration apparatus that aligns the side edges of the paper in the conveyance path 33 and the like is used as necessary.
[0032]
By the way, in the side registration apparatus according to this embodiment, the side guide member attached to the side portion of the conveyance path in parallel with the conveyance direction, the drive roller driven by the motor, and the sheet are fed to the side guide member side. In the side registration device that includes a conveyance roller composed of a crossed roller that is attached to be inclined and that feeds the sheet diagonally toward the side guide member by the conveyance roller, the conveyance roller is configured in the side registration device that aligns the side edges of the sheet. At least one of the rollers is a combination of a plurality of roller members having different diameters and materials, and is configured to change the pressing force on the paper according to the type of the paper.
[0033]
That is, as shown in FIG. 3, the side registration device 40 according to the first embodiment includes a side guide member 41 attached to the side portion of the transport path in parallel with the transport direction, and the direction of the side guide member 41. Conveying roller 43 for feeding the paper 42 obliquely to the head. The conveying roller 43 includes a drive roller 44 that is driven by a motor (not shown) and a crossed roller 45 that is attached so as to be inclined in a direction in which the paper 42 is fed to the side guide member 41 side.
[0034]
Further, as shown in FIG. 1, the drive roller 44 of the transport roller 43 is provided integrally with a first roller member 46 made of a material having a small friction coefficient and on both sides of the first roller member 46. The second roller member 47 made of a material having a large friction coefficient is combined. Further, of the first and second roller members 46 and 47 constituting the drive roller 43, the first roller member 46 has a diameter larger than that of the second roller member 47. In addition, the elastic coefficient of the material constituting the first roller member 46 is set to be smaller than the elastic coefficient of the material constituting the second roller member 47, and the first roller member 46 has a second elastic coefficient. The roller member 47 is more easily deformed with respect to external force.
[0035]
As a material for forming the first roller member 46, for example, various rubber materials such as silicon rubber and EPDM can be used. However, the material is not limited to this, and an elastically deformable synthetic resin is used. Also other materials can be used as appropriate. Further, as a material for forming the second roller member 47, for example, various rubber materials such as silicon rubber and EPDM having different elastic coefficients, synthetic resins such as polyacetal, or metal materials such as stainless steel and aluminum are used. Of course, other materials can be used as appropriate.
[0036]
Further, the first roller member 46 and the second roller member 47 are not only made of different materials, but the surface of the roller members 46 and 47 is subjected to surface treatment such as sandblasting, coating treatment, silica or the like. The friction coefficient and surface roughness of the roller member may be varied by filling the filler.
[0037]
Further, as shown in FIG. 3, the cross-roll 45 is normally pressed against the drive roller 43 with a constant nip pressure. As shown in FIG. 4, the cross roller 45 has a two-stage nip pressure (or 3 if necessary) via a leaf spring 50, a coil spring 51, etc., by a pressing force changing means such as a solenoid 48 or an eccentric cam 49. Can be changed to more than stage). The user who uses the image forming apparatus can input parameters indicating the characteristics of the paper 42 such as the basis weight of the paper 42 from the operation panel or the like. The CPU or the like that controls the operation of the image forming apparatus The nip pressure can be switched by pressing force changing means including a solenoid 48 and an eccentric cam 49 in accordance with the input contents of a parameter indicating the characteristics of the paper 42.
[0038]
In the above configuration, in the side registration apparatus according to the first embodiment, the side edges of the paper are detected even in the case of different types of paper such as the friction coefficient, basis weight, and thickness of the paper surface as follows. It is possible to align.
[0039]
That is, in the side registration apparatus according to the first embodiment, the side edges of the paper 42 are aligned as follows according to the friction coefficient, basis weight, thickness, and the like of the paper 42 surface. .
[0040]
(1) When the basis weight of the paper is smaller than a certain value
In this case, the side registration device is switched to a setting with a small nip pressure, as shown in FIG. At this time, in the drive roller 44, only the first roller member 46 having a large diameter is in contact with the paper 42. Since the first roller member 42 having a large diameter of the drive roller 44 is made of a material having a small friction coefficient, the conveying force is weak as shown in FIG. 7, and the paper 42 can be pressed against the side guide member 41 more than necessary. Therefore, the paper 42 does not buckle.
[0041]
(2) When the basis weight of the paper is greater than a certain value
In the above-described side registration apparatus, in this case, the first roller member 46 alone is insufficient in conveying force, so that the sheet 42 having a large basis weight may not be conveyed to the side guide member 41. Switch the nip pressure to a larger setting as shown. At this time, since the first roller member 46 is deformed and crushed, the second roller member 47 comes into contact with the paper 42 together with the first roller member 46. Since the second roller member 47 newly contacting the paper 42 is made of a material having a large friction coefficient, the conveyance force is increased as shown in FIG. Can be reliably conveyed to the side guide member 41.
[0042]
Thus, in the first embodiment, since the friction coefficient of the roller 44 that contacts the paper 42 can be changed along with the change in the conveyance force due to the change in the pressing force, a wide conveyance force can be set. Appropriate side registration correction can be performed on papers 42 having different properties.
[0043]
Here, in addition to the configuration of the drive roller 44, As a reference example, As shown in FIG. 8, a configuration in which two first roller members 46 are combined on both sides of the second roller member 47, and as shown in FIG. 9, the first roller member 46 and the second roller member 47 are combined. It is also possible to take a configuration in which the above are combined one by one.
[0044]
Further, the material constituting the drive roller 44 is not limited to two types, and may be composed of three or more types. In this case, one roller member may be composed of a plurality of materials, or one drive roller may be composed of three or more types of roller members such as first, second, and third.
[0045]
Further, the item input by the user may be the type and thickness of the paper. Further, when the paper thickness is used as an input item, the paper thickness may be automatically detected by a sensor instead of being input by the user.
[0046]
Embodiment 2
FIG. 10 shows a second embodiment of the present invention. The same reference numerals are given to the same parts as those of the above-described embodiment, and in this second embodiment, a plurality of conveying rollers are arranged. Of the plurality of transport rollers, at least one transport roller is configured to be able to release a nip with respect to the paper according to the type of the paper.
[0047]
That is, in the side registration apparatus according to the second embodiment, as shown in FIG. 10, two transport rollers 51 and 52 are arranged at different positions. Further, one of the transport rollers 51 can release the nip by a solenoid (not shown).
[0048]
Also in the second embodiment, the basis weight of the paper 42 can be input by the user. Then, the transport roller to be nipped is selected according to the input content.
[0049]
In the above configuration, in the side registration apparatus according to the second embodiment, the side edges of the paper are detected even in the case of different types of paper such as the friction coefficient, basis weight, and thickness of the paper surface as follows. It is possible to align.
[0050]
That is, in the side registration apparatus according to the second embodiment, the side edges of the paper are aligned as follows according to the friction coefficient, basis weight, thickness, and the like of the paper surface.
[0051]
(1) When the basis weight of the paper is smaller than a certain value
In the above side registration device, if the conveying force is large, the sheet 42 is pressed more than necessary against the side guide member 41 and the sheet 42 is buckled, so that only one conveying roller 52 is provided as shown in FIG. Nip and reduce transport force.
[0052]
(2) When the basis weight of the paper is greater than a certain value
In the above-described side registration apparatus, since the conveyance force is insufficient with only one conveyance roller 52, the sheet 42 having a large basis weight may not be conveyed to the side guide member 41. Therefore, as illustrated in FIG. Both rollers 51 and 52 are nipped to increase the conveying force.
[0053]
In the second embodiment, a wide conveying force can be set by setting the number of rollers to be niped, and appropriate side registration correction can be performed on sheets having different properties.
[0054]
Note that the number of conveying rollers to be nipped may be plural.
[0055]
In order to release the nip, an eccentric cam or the like may be used instead of the solenoid.
[0056]
Further, the item input by the user may be the type and thickness of the paper. Further, when the paper thickness is used as an input item, the paper thickness may be automatically detected by a sensor instead of being input by the user.
[0057]
Since other configurations and operations are the same as those of the first embodiment, description thereof is omitted.
[0058]
Embodiment 3
FIG. 13 shows a third embodiment of the present invention. The same reference numerals are given to the same parts as those in the previous embodiment, and in this third embodiment, at least one transport roller is provided. Are arranged at different inclination angles, and at least one of the plurality of transport rollers is configured to be able to release the nip with respect to the paper according to the type of the paper.
[0059]
That is, in the side registration apparatus according to the third embodiment, as shown in FIG. 13, two transport rollers 61 and 62 are arranged at different positions. In addition, the crossed rollers 45 are attached at different angles, and one of the rollers 62 is disposed more inclined to the side guide member 41 side.
[0060]
Also in the second embodiment, the basis weight of the paper can be input by the user. Then, the transport roller to be nipped is selected according to the input content.
[0061]
In the above configuration, in the side registration apparatus according to the third embodiment, the side edge of the paper is detected even in the case of different types of paper such as the friction coefficient, basis weight, and thickness of the paper surface as follows. It is possible to align.
[0062]
That is, in the side registration apparatus according to the third embodiment, the side edges of the paper are aligned as follows according to the friction coefficient, basis weight, thickness, and the like of the paper surface.
[0063]
(1) When the basis weight of the paper is smaller than a certain value
In the above side registration device, if the conveying force is large, the paper 42 is pressed against the side guide member 41 more than necessary and the paper 42 is buckled, so that the inclination of the cross roller 45 is small as shown in FIG. Only the conveying roller 61 is nipped to reduce the conveying force. In this case, since the component of the conveyance force that moves the paper 42 in the lateral direction is small, the paper 42 is not pressed against the side guide member 41 more than necessary and the paper is not buckled.
[0064]
(2) When the basis weight of the paper is greater than a certain value
In the side registration apparatus 4, since the conveyance force is insufficient with the conveyance roller 61, there is a case where the paper 62 having a large basis weight cannot be conveyed to the side guide member 41, as shown in FIG. Only the conveying roller 62 having a large inclination of the cross roller 45 is nipped. In this case, since the component of the conveying force that moves the paper 42 in the lateral direction is large, the paper 42 can be reliably sent to the side guide member 41.
[0065]
As described above, in the third embodiment, it is possible to set a wide conveying force by setting the mounting angle of the crossed roller 45 and setting the plurality of rollers 61 and 62 having different mounting angles, and the properties are different. Appropriate side registration correction can be performed on paper.
[0066]
Note that the number of conveying rollers to be niped and the mounting angle of the rollers may be plural.
[0067]
Further, the item input by the user may be the type and thickness of the paper. Further, when the paper thickness is used as an input item, the paper thickness may be automatically detected by a sensor instead of being input by the user.
[0068]
Since other configurations and operations are the same as those of the first embodiment, description thereof is omitted.
[0069]
Embodiment 4
FIG. 16 shows Embodiment 4 of the present invention. The same reference numerals are given to the same parts as those in the above embodiment, and in this Embodiment 4, the rollers constituting the conveying rollers are shown. At least one of the rollers is formed by combining a plurality of roller portions made of the same material and having different diameters, and is configured to change the pressing force on the paper according to the type of the paper.
[0070]
That is, as shown in FIG. 16, the side registration apparatus according to the fourth embodiment includes a side guide member 41 attached to the side portion of the conveyance path in parallel with the conveyance direction, and the direction of the side guide member 41. It comprises a conveyance roller 70 for feeding the paper at an angle. The conveying roller 70 includes a drive roller 44 that is driven by a motor (not shown) and a cross roller 45 that is attached so as to be inclined in a direction in which the paper 42 is fed to the side guide member 41 side.
[0071]
Further, as shown in FIG. 16, the drive roller 44 of the conveying roller 70 includes a first roller member 71 having a large diameter and a small diameter integrally provided on both sides of the first roller member 71. Although the second roller member 72 is combined, the first and second roller members 71 and 72 are made of the same material.
[0072]
Since other configurations and operations are the same as those of the first embodiment, description thereof is omitted.
[0073]
【The invention's effect】
The invention described in claim 1 of the present invention has the above-described configuration and operation. Usually, a roller having a large diameter comes into contact with the paper and conveys the paper, but if the force for pressing the roller is increased, the diameter is increased. The large roller is deformed, and the small roller having a high coefficient of friction or the like also comes into contact with the sheet to convey the sheet, so that the sheet conveying force can be changed. In addition, a wider conveying force can be obtained depending on the material of the roller than when only the pressing force is changed.
[0074]
In addition, the invention described in claim 2 has the above-described configuration and operation. Usually, a roller having a large diameter comes into contact with the paper and conveys the paper. Since the large roller is deformed and the roller having a small diameter comes into contact with the sheet to convey the sheet, the sheet conveying force can be changed.
[0075]
Furthermore, the invention described in claim 3 has the above-described configuration and operation. By changing the number of rollers to be niped, the sheet conveying force can be changed, and by setting the number of rollers, a wide range can be obtained. A conveyance force can be obtained.
[0076]
Still further, the invention described in claim 4 has the above-described configuration and operation, and by selecting the roller to be nipped, the amount of paper to be obliquely fed in the direction of the side guide member can be changed. Therefore, a wide conveying force can be obtained by setting the angle of the roller.
[Brief description of the drawings]
FIG. 1 is a main part configuration diagram showing Embodiment 1 of a side registration apparatus according to the present invention.
FIG. 2 is a block diagram showing an embodiment of an image forming apparatus to which the side registration apparatus according to the present invention can be applied.
FIG. 3 is a main part configuration diagram showing a first embodiment of a side registration apparatus according to the present invention.
FIG. 4 is a block diagram showing a drive mechanism of a side registration apparatus according to an embodiment of the present invention.
FIG. 5 is a block diagram showing the operation of the side registration apparatus according to one embodiment of the present invention.
FIG. 6 is a block diagram showing the operation of the side registration apparatus according to one embodiment of the present invention.
FIG. 7 is a graph showing the relationship between the pressing force and the conveying force of the side registration apparatus according to one embodiment of the present invention.
FIG. 8 shows a side registration apparatus according to an embodiment of the present invention. Reference example FIG.
FIG. 9 shows a side registration apparatus according to an embodiment of the present invention. Reference example FIG.
FIG. 10 is a configuration diagram showing a second embodiment of a side registration apparatus according to the present invention.
FIG. 11 is a block diagram showing the operation of the side registration apparatus according to Embodiment 2 of the present invention.
FIG. 12 is a block diagram showing the operation of the side registration apparatus according to Embodiment 2 of the present invention.
FIG. 13 is a block diagram showing Embodiment 3 of the side registration apparatus according to the present invention.
FIG. 14 is a block diagram showing the operation of the side registration apparatus according to Embodiment 2 of the present invention.
FIG. 15 is a block diagram showing the operation of the side registration apparatus according to Embodiment 2 of the present invention.
FIG. 16 is a block diagram showing Embodiment 4 of the side registration apparatus according to the present invention.
FIG. 17 is a main part configuration diagram of a side registration apparatus according to Embodiment 2 of the present invention;
[Explanation of symbols]
40 Side registration device, 41 Side guide member, 42 Paper, 43 Conveying roller, 44 Drive roller, 45 Crossed roller, 46 First roller member, 47 Second roller member

Claims (4)

Conveying roller comprising a side guide member attached to the side of the conveying path in parallel with the conveying direction, a drive roller driven by a motor, and a cross roller attached to be inclined in a direction to feed paper to the side guide member side In the side registration apparatus in which the sheet is obliquely fed in the direction of the side guide member by the conveyance roller and the side edges of the sheet are aligned, at least one of the rollers constituting the conveyance roller has a small coefficient of friction. A first roller member made of a material and having a large diameter and a second roller member integrally provided on both sides of the first roller member and made of a material having a large friction coefficient and having a diameter smaller than that of the first roller member It becomes a combination of, characterized by being configured so as to change the pressing force against the sheet in accordance with the type of paper Side registration device that. Conveying roller comprising a side guide member attached to the side of the conveying path in parallel with the conveying direction, a drive roller driven by a motor, and a cross roller attached to be inclined in a direction to feed paper to the side guide member side In the side registration apparatus that obliquely feeds the sheet toward the side guide member by the conveying roller and aligns the side edges of the sheet, at least one of the rollers constituting the conveying roller is made of the same material. The first roller member having a large diameter and the second roller member integrally provided on both sides of the first roller member and having a smaller diameter than the first roller member are combined, A side registration apparatus configured to change the pressing force on the paper according to the conditions. Conveying roller comprising a side guide member attached to the side of the conveying path in parallel with the conveying direction, a drive roller driven by a motor, and a cross roller attached to be inclined in a direction to feed paper to the side guide member side In the side registration device that obliquely feeds the paper in the direction of the side guide member by the transport roller and aligns the side edges of the paper, a plurality of the transport rollers are arranged, and at least of the plurality of transport rollers. One transport roller is formed by integrating at least one of the rollers constituting the transport roller with a first roller member made of a material having a small friction coefficient and a large diameter on both sides of the first roller member. And a second roller member made of a material having a large friction coefficient and having a diameter smaller than that of the first roller member. Together it, and the side registration apparatus being characterized in that releasably configured nip for the sheet in accordance with the type of paper. Conveying roller comprising a side guide member attached to the side of the conveying path in parallel with the conveying direction, a drive roller driven by a motor, and a cross roller attached to be inclined in a direction to feed paper to the side guide member side In the side registration device that obliquely feeds the paper in the direction of the side guide member by the transport roller and aligns the side edges of the paper, at least one of the transport rollers is arranged with a different inclination angle from the other. Of the plurality of transport rollers, at least one of the transport rollers includes at least one of the rollers constituting the transport roller, the first roller member made of a material having a small friction coefficient and a large diameter, The first roller member is integrally provided on both sides and is made of a material having a large friction coefficient and has a diameter of the first roller member. It becomes a combination of smaller second roller members than La member, and the side registration apparatus being characterized in that releasably configured nip for the sheet in accordance with the type of paper.

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