JP2004284741A - Sheet transport device and sheet handling device equipped with it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low-cost sheet transport device embodied on the sheet alignment system of the side registration reference, capable of preventing a sheet from being damaged by a skew generated by a downstream transporting member. <P>SOLUTION: The sheet transport device is equipped with a guide member 1 to restrict the sheet side arranged in a sheet transport path, a skewing member 2 to skew the transporting direction of the sheet 4 toward the guide member 1, and the transporting member 3 for transporting the sheet 4 installed on the downstream side of the guide member 1 about the sheet transporting direction, wherein the arrangement further includes a guide moving means 5 to advance and retreat the guide member 1 between the restriction position and the retreat position. The invention also includes a sheet handling device equipped with this sheet transport device. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a sheet conveying apparatus used in a sheet conveying path in a sheet processing apparatus such as a copying machine, a printer, a finisher, etc., and more particularly, to a sheet conveying apparatus having a mode for regulating a side end of a sheet in the sheet conveying path, and The present invention relates to an improvement of a sheet processing apparatus using the same.
[0002]
[Prior art]
In general, as an example of a sheet processing apparatus such as an image forming apparatus using an electrophotographic method, an electrostatic latent image corresponding to an image signal is formed on a latent image carrier such as a photosensitive drum. Is developed by transferring an image (toner image) obtained by developing the image onto a sheet as a recording material directly or via an intermediate transfer member.
Such an image forming apparatus incorporates a sheet conveying apparatus for performing sheet alignment for correcting a positional shift due to a skew or the like of a sheet being conveyed.
As this type of sheet alignment method, there has been known an alignment method based on a so-called side registration standard, which mainly corrects a sheet conveyance posture based on a side edge (side) of a sheet being conveyed.
[0003]
In the alignment method based on the side registration standard, a skew roll as an aligner is arranged in the sheet conveyance path, a side guide is arranged on the side of the sheet conveyance path, and the sheet being conveyed by the skew roll is used as a side guide. By abutting the sheet, the side of the sheet is aligned with the reference position by the side guide, and the conveying posture of the sheet is corrected.
In such an alignment method based on the side registration standard, the skew roll continues to apply a component force (skew correction force) in a direction perpendicular to the conveyance direction to the sheet even after the skew correction of the sheet is completed. At the stage where the sheet is nipped by the installed transport roll, a method is employed in which the nip of the skew roll is normally released to maintain good sheet transport performance by the transport roll.
[0004]
[Patent Document 1]
JP-A-11-189355 (Embodiment of the invention, FIG. 8)
[0005]
[Problems to be solved by the invention]
However, in the above-described sheet alignment method, when the sheet is nipped by the transport roll, the sheet is affected by the rotation (skew) of the sheet, which is generated by the transport roll, so that the rear end portion of the sheet particularly becomes the side guide. Strong hits may cause damage to the sheet (such as buckling).
[0006]
Prior art that solves such technical problems includes a side guide, a skew roll, a detection sensor for detecting the side of a sheet, and a movement that is located downstream of the side guide and orthogonal to the conveyance direction. A high-precision sheet alignment system that includes a transport roll capable of performing a control of moving the transport roll in a direction orthogonal to the sheet transport direction (side shift) based on the timing at which the detection sensor detects the side of the sheet. It has been proposed (see Patent Document 1).
Here, the sheet is moved in a direction away from the side guides (side shift) while being conveyed by the conveyance rolls, thereby reducing the influence of the rotation (skew) of the sheet generated by the conveyance rolls to a considerable extent. The aim is to prevent damage (buckling, etc.) to the sheet caused by contact with the sheet.
[0007]
However, in such an aspect, the mechanism for performing the side shift becomes complicated, which may lead to an increase in cost, and a possibility that the operation of the mechanism may be loosened by performing gear driving or the like. There is also a concern that high-precision sheet alignment may be impaired.
[0008]
SUMMARY OF THE INVENTION The present invention has been made to solve the above technical problem, and a sheet transporting apparatus capable of preventing a sheet from being damaged while employing a sheet alignment method based on a side registration, and a sheet provided with the same. A processing device is provided.
[0009]
[Means for Solving the Problems]
That is, according to the present invention, as shown in FIGS. 1A and 1B, the guide member 1 for regulating the sheet side end disposed in the sheet conveying path and the conveying direction of the sheet 4 are set to the guide member 1 side. In a sheet conveying apparatus having a skew member 2 skewed toward the sheet and a conveying member 3 disposed downstream of the guide member 1 in the sheet conveying direction to convey the sheet 4, the guide member 1 is moved to a regulating position. It is characterized by including a guide moving means 5 for moving back and forth between the retracted position.
FIG. 1A is an explanatory view showing a state in which the sheet 4 is conveyed in the sheet conveying path and nipped by the skew member 2, and FIG. FIG. 5 is an explanatory diagram showing a state in which the guide member 1 has been moved to a retracted position after being nipped by the transport member 3 provided in the first embodiment.
[0010]
In such technical means, the guide member 1 is usually fixedly provided, but may be movable depending on the type, size, environment and the like of the sheet 4.
Further, the skew member 2 may have a mode in which the transport direction of the sheet 4 is fixedly determined, or a mode in which the transport direction changes following the movement of the sheet 4.
Further, the regulating position of the guide member 1 moved by the guide moving means 5 may be a position regulating the side end of the sheet 4, and the retreat position may be a position remote from the regulating position. , But may be provided at a plurality of locations.
[0011]
Furthermore, when this aspect is considered as a control system, the guide moving means 5 is controlled so that the guide member 1 is moved from the regulation position to the retreat position under the condition that the sheet 4 conveyed to the conveyance member 3 is nipped. What is necessary is just to grasp that the guide control means 6 is provided.
As a specific example of the guide control means 6, a sensor 7 is provided, which controls the guide moving means 5 to perform predetermined processing based on information from the sensor 7. After passing through a region corresponding to (i.e., a portion regulated by the guide member 1 along the sheet conveying direction), the guide moving means 5 is controlled so that the guide member 1 is returned from the retracted position to the regulated position. Things.
In other words, the guide control means 6 determines the movement start timing of the guide member 1 from the restriction position to the retreat position and the movement start timing of the retraction position from the restriction position based on the passage timing of the sheet 4 detected by the sensor 7. Then, any device may be used as long as it controls the guide moving means 5 so that the guide member 1 performs the forward / backward operation.
[0012]
Here, the sensor 7 is not limited to the position shown in FIG. 1, but may be a downstream side of the transport member 3 or an area of the guide member 1 (specifically, the guide member 1 is restricted). (A region where the sheet 4 is in contact with the sheet 4), a portion that does not hinder sheet conveyance, or an upstream side of the guide member 1.
The number of the sensors 7 is not limited to one, but may be plural, and the sensors 7 for detecting the leading and trailing edges of the sheet 4 may be the same or may be different. No problem.
Note that the detection method of the sensor 7 is not limited to optical means, and another electromagnetic method, for example, detection of a change in capacitance or the like may be used.
[0013]
Further, in this aspect, it is preferable that the guide moving means 5 moves the guide member 1 in a direction orthogonal to the sheet conveying direction.
Here, the term “perpendicular to the sheet conveying direction” includes a direction perpendicular to the sheet conveying surface and a direction perpendicular to the sheet conveying surface, and any of them may be used.
Further, the guide moving means 5 can also move the guide member 1 so as to be able to swing, using one point of the guide member 1 as a swing fulcrum. In this case, the swing fulcrum does not need to be at a portion where the guide member 1 regulates the sheet 4 to be conveyed, but may be a part of the guide member 1, and other members may be fixed to the guide member 1. Including.
[0014]
Further, the present invention is not limited to the sheet conveying device, but also applies to a sheet processing device incorporating the same. In this case, according to the present invention, a sheet processing apparatus having a sheet processing unit in the sheet transport path may include the above-described sheet transport apparatus in the sheet transport path.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.
◎ Embodiment 1
FIG. 2 is an explanatory diagram illustrating Embodiment 1 of the sheet processing apparatus to which the present invention has been applied.
In FIG. 1, the sheet processing apparatus according to the present embodiment is an image forming apparatus employing a so-called tandem type intermediate transfer system, and includes an image forming unit 21 in which an image forming module 30 is housed, and an image forming unit 21. A sheet supply unit 22 that supplies recording sheets (not shown) such as paper to the image forming unit 21 in a parallel arrangement, and a sheet that is arranged in parallel with the image forming unit 21 and in which an image is formed by the image forming unit 21. And a post-processing unit 23 for performing post-processing.
[0016]
In the present embodiment, the image forming unit 21 forms an image on which each color component toner image (for example, yellow (Y), magenta (M), cyan (C), black (K)) is formed by, for example, an electrophotographic method. The image forming module 30 includes a plurality of photosensitive drums 31 (specifically, 31Y, 31M, 31C, and 31K) that form and carry toner images of respective color components. The respective color component toner images formed at 31 are sequentially primary-transferred onto the intermediate transfer belt 40, and the respective color component toner images on the intermediate transfer belt 40 are secondarily transferred onto the recording sheet supplied from the sheet supply unit 22 by the secondary transfer roll 50. The image is transferred and guided to the fixing device 60.
[0017]
In the present embodiment, a charger (not shown) for charging the photosensitive drum 31 around each photosensitive drum 31, a laser exposure unit 33 for writing an electrostatic latent image on the photosensitive drum 31, and each color component A developing unit 34 that contains toner and visualizes the electrostatic latent image on the photosensitive drum 31; a primary transfer roll 35 that transfers each color component toner image on the photosensitive drum 31 to the intermediate transfer belt 40; Electrophotographic devices such as a cleaner 36 for removing residual toner and the like on the drum 31 are sequentially arranged.
The intermediate transfer belt 40 is circulated and transported by being stretched by a plurality (five in this example) of stretching rolls 41 to 45. For example, the stretching roll 41 is used as a driving roll, and other stretching rolls are used. The suspension rolls 42 to 45 are driven rollers, and any of the suspension rolls 42 to 45, for example, the suspension roll 43 is made to function as a tension roll for applying tension to the intermediate transfer belt 40. Things.
In the present embodiment, a portion of the intermediate transfer belt 40 facing the tension roll 44 is set as a secondary transfer portion, and a secondary transfer roll is provided on the surface side of the secondary transfer portion of the intermediate transfer belt 40. The transfer bias 50 is applied between the secondary transfer roll 50 and the tension roll 44 (functioning as a backup roll) facing the secondary transfer roll 50.
[0018]
Further, in the present embodiment, as shown in FIG. 2, the sheet supply unit 22 has multiple (three in this example) sheet supply trays 71 to 73, and the sheet supply trays 71 and 72 While sheets made of different plain papers are accommodated, the lowermost large-capacity sheet supply tray 73 accommodates special sheets including sheets having high bending rigidity such as coated paper and cardboard.
In the present embodiment, the sheet supply trays 71 and 72 have feed rolls 74 and 75 on the opposite side of the image forming unit 21, and the sheet supply tray 73 has feed rolls 76 on the image forming unit 21 side. ing.
The sheet transport path from the sheet supply trays 71 and 72 is configured as a bypass transport path 77.
On the other hand, the sheet transport path from the sheet supply tray 73 is configured as a direct transport path 78, and the direct transport path 78 and the bypass transport path 77 are connected to a merge transport path 79, and the recording sheet is fed to the outlet 80. To the image forming unit 21 side.
[0019]
A plurality of paired transport rolls 81 are provided at predetermined intervals on the bypass transport path 77, the direct transport path 78, and the merge transport path 79 of the sheet supply unit 22.
Further, in a portion of the unit case 220 of the sheet supply unit 22 opposite to the image forming unit 21, a cover 100 that opens and closes facing the bypass conveyance path 77 is provided.
The cover 100 is rotatable, for example, using the back side of the unit case 220 as a rotation fulcrum, and rotatably holds a driven roll 81b of the paired transport rolls 81 (81a, 81b). At the time of opening, the drive roll 81a and the driven roll 81b of the transport roll 81 are separately arranged.
In the present embodiment, a connection conveyance path 101 extending in the horizontal direction toward the opposite side of the image forming unit 21 is formed in a horizontal conveyance path portion of the bypass conveyance path 77 of the sheet supply unit 22. For example, in a mode in which another sheet supply unit (not shown) is disposed adjacent to the sheet supply unit 22, the connection conveyance path 101 receives a recording sheet supplied from another sheet supply unit and returns to the bypass conveyance path 77. , Or as a recording sheet insertion section by manual feeding of the sheet supply unit 22.
[0020]
Furthermore, in the present embodiment, an image reading unit 24 and a user operation unit 25 are disposed above the sheet supply unit 22.
The image reading unit 24 is for optically reading an image of a document placed on a document table, and includes, for example, a light source, a reflecting mirror, an imaging lens, a CCD sensor, and the like.
[0021]
Further, in the present embodiment, the post-processing unit 23 has an entrance opening 231 at a position of the unit case 230 corresponding to the recording sheet outlet 211 opened in the unit case 210 of the image forming unit 21, and An outlet opening 232 is opened at the position of the unit case 230 on the opposite side of the forming unit 21.
A sheet discharge tray 233 is attached to the unit case 230 corresponding to the outlet opening 232.
Further, an inclined conveying path 234 is provided between the inlet opening 231 and the outlet opening 232 in an oblique direction. The inclined conveying path 234 is branched into two on the way, and each of the branched conveying paths has an up-curl. Curling devices 235 and 236 for straightening and down-curling are provided.
The inclined transport path 234 is provided with an appropriate number (three in this example) of paired transport rolls 237.
[0022]
Further, the sheet feeding path in the image forming unit 21 guides the sheet supplied from the sheet feeding unit 22 to the secondary transfer portion via the sheet aligning device 82 and the registration roll 83, and then feeds the sheet to the transfer belt 84 and the fixing belt. In addition to a path for passing the sheet through the unit 60 and discharging the sheet to the post-processing unit 23, a path for reversing the sheet sent from the fixing unit 60 and returning the sheet to the secondary transfer portion again is provided.
[0023]
Further, as a sheet returning mechanism used in the present embodiment, the recording sheet sent from the fixing device 60 is transported by an appropriate number of transport rolls 86 along a loop-shaped return path 85. A reversing unit (in the present example, using the lower space in the post-processing unit 23) 87 is provided in the middle of the path 85, and the sheet is reversed through the reversing unit 87.
A part of the return path 85 uses the space in the sheet supply unit 22 and is connected to the merging conveyance path 79.
[0024]
Here, as shown in FIG. 3, the sheet aligning device 82 before reaching the secondary transfer portion, which is a feature of the present invention, extends in the sheet transporting direction in the sheet transporting direction to the sheet side end 14s (see FIG. 3). 5), and a plurality (three in this example) of paired cross trawls (skew rolls) 12 that skew the sheet conveyance direction toward the side guides 11 are provided. I have.
In FIG. 3, reference numeral 81 denotes a pair (two pairs in this example) of transport rollers disposed upstream of the sheet aligning device 82, and reference numeral 83 denotes downstream of the sheet aligning device 82. This is a paired resist roll.
[0025]
In the present embodiment, the side guide 11 is configured to be movable by a guide moving mechanism 15 between a restriction position and a retreat position along a direction orthogonal to the sheet conveyance direction.
Next, details of the guide moving mechanism 15 will be described with reference to FIG.
In the figure, a guide moving mechanism 15 slidably supports a side guide 11 with a pair of guide rails 301 extending in a direction perpendicular to the sheet conveyance direction. And a rack (not shown) is formed on one side edge of the engagement piece 302, and a motor 303 as a drive source is provided near the engagement piece 302. (In this example, a stepping motor is used), and a pinion 304 fixed to a shaft of the motor 303 is engaged with the rack.
Further, the guide rail 301 and the side guide 11 are subjected to a treatment such as providing a roller on the guide rail 301 or lubricating the surface thereof in order to reduce the frictional resistance when sliding. Is preferred.
Furthermore, as the motor 303, an ultrasonic motor, an actuator, or the like may be used.
[0026]
Further, the cross rolls 12 (12a, 12b, 12c) and the resist rolls 83 are nip-released at predetermined timings via nip release mechanisms 18, 19, respectively.
Further, a path sensor 17 is provided between the side guide 11 and the registration roll 83 in the sheet conveying path, and detects a timing at which the sheet 14 passes.
[0027]
Further, in the present embodiment, a control device 16 composed of, for example, a microcomputer system is provided. The control device 16 captures various input signals such as a path sensor 17 via an I / O port and executes a predetermined program ( A predetermined control signal is transmitted to the guide moving mechanism 15, the nip release mechanisms 18 and 19, and the like.
[0028]
Next, the operation of the sheet processing apparatus (mainly the sheet conveying apparatus) according to the present embodiment will be described.
Now, as shown in FIG. 2, assuming that a sheet is sent out from one of the sheet supply trays 71 and 72 of the sheet supply unit 22, the sheet is imaged from a delivery port 80 via a bypass conveyance path 77 and a merge conveyance path 79. It is sent out to the forming unit 21 side, and is conveyed to the secondary transfer site via the conveyance roll 81, the cross roll 12, and the registration roll 83.
In this state, the color toner image formed by the image forming module 30 is transferred to the sheet, and the transferred sheet passes through the fixing device 60 and is conveyed to the post-processing unit 23 side.
Then, on the post-processing unit 23 side, the sheet is conveyed through the inclined conveyance path 234. In this process, for example, after any one of the curling devices 235 and 236 under the condition where the sheet is curled. Processing (curl correction) is performed, and the sheet is discharged to the sheet discharge tray 233.
[0029]
In such an operation process, attention is paid to the sheet alignment method before reaching the secondary transfer portion, which is a feature point of the present invention, and its operation will be described with reference to FIGS.
First, as shown in FIG. 5A, when the sheet 14 is conveyed in the sheet conveyance path and nipped by the cross trol 12, the conveyance direction of the sheet 14 is changed by the cross trol 12 to the direction of the side guide 11 (specifically, FIG. 5A). , The sheet 14 is skewed toward the side guide 11.
Next, as shown in FIG. 5B, when the sheet side end 14s reaches the side guide 11, the sheet 14 is conveyed with the sheet side end 14s along the side guide 11, and the sheet 14 is moved in the conveying direction. In the direction shown in FIG.
Therefore, when the leading end of the sheet 14 is nipped by the registration roll 83 as shown in FIG. 5C, the guide moving mechanism 15 for moving the side guide 11 in the direction shown in FIG.
5D, the side guide 11 moves to the retracted position, so that the side guide 11 is in contact with the skew when the conveyed sheet 14 is nipped by the registration roll 83. And sheet damage (buckling, etc.) can be prevented.
[0030]
Here, as for the guide moving mechanism 15 for retracting the side guide 11, as shown in FIG. 4B, the motor 303 starts to rotate in the direction (D) by a signal from the control device, so that the engagement piece The side guide 11 is moved in the direction (C) away from the sheet conveying path, so that the side guide 11 engaged with the engaging piece 302 retreats from the sheet conveying path.
[0031]
Referring to FIG. 3, for example, the timing at which the side guide 11 moves from the restriction position to the retreat position is determined by the control device 16 based on information that the path sensor 17 detects the passage of the leading end of the sheet 14. After that, the control device 16 operates the guide moving mechanism 15, and also operates the nip release mechanism 18 to release the nip of the cross trol 12.
Further, after the conveyed sheet 14 passes through the area of the side guide 11, the control device 16 causes the guide moving mechanism 15 to perform an operation of returning the side guide 11 from the retracted position to the restricted position at a predetermined timing. The nip release mechanism 19 is operated to release the nip of the registration roll 83, so that the next sheet conveyance is awaited.
The timing at which the control device 16 returns the side guide 11 from the retracted position to the restriction position may be a timing after the sheet 14 has passed through the area of the side guide 11 and until the sheet 14 can cope with the next sheet conveyance. For example, the detection is performed based on information that the path sensor 17 detects the passage of the rear end of the sheet 14.
[0032]
◎ Embodiment 2
FIGS. 6A and 6B are explanatory diagrams illustrating main parts of the sheet conveying device according to the second embodiment.
In the figure, the basic configuration of the sheet conveying apparatus is substantially the same as that of the first embodiment, but a guide moving mechanism 15 for moving the side guide 11 forward and backward is different from that of the first embodiment. The same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and the detailed description thereof will be omitted.
In FIG. 6A, the guide moving mechanism 15 has an electromagnetic solenoid 311 that moves forward and backward in a direction perpendicular to the sheet conveying surface, and moves the operating rod 312 made of a magnetic material slidable with the electromagnetic solenoid 311 to the side guide 11. The spring 313 which is fixed to the side guide 11 and urges the sheet guide surface vertically upward is disposed on the side guide 11.
In this embodiment, as shown in FIG. 6A, when the side guide 11 is at the regulation position, the electromagnetic solenoid 311 is excited, and the operating rod 312 is moved in the (E) direction by a force resisting the tension of the spring 313. The position is held by magnetic attraction.
[0033]
Then, when the sheet 14 is nipped by the registration roll 83, as shown in FIG. 6B, the magnetic attraction of the electromagnetic solenoid 311 is stopped, and the attraction of the operating rod 312 is stopped. Due to the tension in the direction (1), the side guide 11 is lifted vertically above the sheet conveying surface, and the side guide 11 is separated from the sheet 14, so that sheet damage can be prevented.
[0034]
◎ Embodiment 3
FIGS. 7A and 7B are explanatory diagrams illustrating main parts of the sheet conveying device according to the third embodiment.
In the figure, the basic configuration of the sheet conveying apparatus is substantially the same as that of the first embodiment, but a guide moving mechanism 15 for moving the side guide 11 forward and backward is different from that of the first embodiment. The same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and the detailed description thereof will be omitted.
7A, the guide moving mechanism 15 is provided with a pivot 321 at one end of the side guide 11 to allow the side guide 11 to swing freely, and at the other end of the side guide 11, a motor 322 as a drive source is provided. The eccentric cam 323 fixed to the shaft is pressed against the eccentric cam 323, and a spring 324 is disposed near the eccentric cam 323 so as to bias the side guide 11 toward the eccentric cam 323. is there.
[0035]
In the present embodiment, as shown in FIG. 7A, when the side guide 11 is at the regulation position, the tension of the spring 324 in the (H) direction is adjusted by the eccentric cam 323 to move the side guide 11 to the pivot 321. Rotation around the center is suppressed.
When the sheet 14 is nipped by the registration roll 83, the eccentric cam 323 starts rotating in the direction (G) by the rotation of the motor 322 as shown in FIG. The side guide 11 moves about the pivot 321 by the tension in the direction.
[0036]
As a result, the side guide 11 is separated from the sheet 14, and sheet damage can be prevented.
The position of the pivot 321 is not limited to this example. If the side guide 11 does not come into contact with the sheet 14 when retreating, for example, the pivot 321 may be located at another portion of the side guide 11.
[0037]
【The invention's effect】
As described above, according to the present invention, in the sheet registration method based on the side registration, after the sheet is nipped by the transport member downstream of the guide member, the guide member that guides the side edge of the transport sheet is moved. Since the sheet is separated from the sheet, the sheet does not come into contact with the guide member when skew (rotation) occurs due to the conveying member, so that sheet damage by the guide member can be prevented.
Further, in the present invention, since the movement of the guide member can be realized with a simple structure, a sheet processing apparatus which is inexpensive and has high-accuracy registration performance can be provided.
[Brief description of the drawings]
FIGS. 1A and 1B are explanatory diagrams showing an outline of a sheet conveying apparatus according to the present invention.
FIG. 2 is an explanatory diagram illustrating Embodiment 1 of the sheet processing apparatus to which the present invention has been applied.
FIG. 3 is an explanatory diagram illustrating a main part of the sheet conveying apparatus according to the first embodiment.
FIGS. 4A and 4B are explanatory views showing a guide moving mechanism according to the first embodiment.
FIGS. 5A to 5D are explanatory diagrams illustrating the operation of the sheet conveying unit according to the first embodiment.
FIGS. 6A and 6B are explanatory diagrams illustrating a main part of a sheet conveying apparatus according to a second embodiment.
FIGS. 7A and 7B are explanatory diagrams illustrating a main part of a sheet conveying apparatus according to a third embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Guide member, 2 ... Skew member, 3 ... Conveying member, 4 ... Sheet, 5 ... Guide moving means, 6 ... Guide control means, 7 ... Sensor

Claims (9)

A guide member that regulates a sheet side end disposed in the sheet conveyance path, a skew member that skews the sheet conveyance direction toward the guide member side, and is disposed downstream of the guide member in the sheet conveyance direction. A sheet conveying device having a conveying member that conveys the sheet.
A sheet conveying device comprising a guide moving means for moving the guide member between a regulating position and a retreat position. The sheet conveying device according to claim 1,
A guide control unit that controls a guide moving unit so as to move the guide member from the regulation position to the retreat position under the condition that the sheet to be conveyed nips to the conveyance member located on the downstream side of the guide member. Characteristic sheet conveying device. The sheet conveying device according to claim 2,
The sheet conveying device, wherein the guide control unit controls the guide moving unit to move the guide member from the retracted position to the restriction position under a condition that the conveyed sheet passes through an area corresponding to the guide member. . The sheet conveying device according to claim 1,
The sheet conveying device, wherein the guide moving means moves the guide member in a direction orthogonal to the sheet conveying direction. The sheet conveying device according to claim 1,
The sheet moving device, wherein the guide moving means is configured to move the guide member so as to swing freely with one point of the guide member as a swing fulcrum. The sheet conveying device according to claim 2,
The guide control unit includes a sensor that recognizes a position of the conveyed sheet,
A sheet conveyance device for determining a movement start timing of a guide member based on a sensor output. The sheet conveying device according to claim 6,
The sheet control device, wherein the guide control means determines the retreat start timing of the guide member based on the timing at which the conveyed sheet passes through the sensor. The sheet conveying device according to claim 6,
A sheet conveying device, wherein the guide control means determines the timing to start returning the guide member to the regulated position based on the timing at which the conveyed sheet has passed the sensor. In a sheet processing apparatus that processes sheets in a sheet processing unit,
A sheet processing apparatus comprising the sheet conveying apparatus according to claim 1 arranged in a sheet conveying path.

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