JP2014201382A - Sheet transport device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet transport device of a compact constitution capable of performing quick sheet transport involving a turning of 90°.SOLUTION: A reference plate 19, which is to be abutted by the tip edge F of a sheet S transported from a first transportation direction X, extends along a second transportation direction Y perpendicular to the first transportation direction X. An abutment guide 23 is arranged to confront the reference plate 19 through a predetermined spacing from the reference plate 19, and extends in parallel with the reference plate 19. In parallel with the reference plate 19, there is arranged an inclined roller row 20 for transporting the sheet S in the second transportation direction Y with the sheet S side-slipping along the reference plate 19 while supporting the lower surface of the sheet S. The sheet transport device brings the abutment guide 23 into abutment against the rear end edge B of the sheet S by a guide drive mechanism while having the sheet S side-slipping along the reference plate 19 on the inclined roller row 20, so that the tip edge F is brought closer to the reference plate 19 to correct the skew of the sheet S.

Description

  The present invention relates to a sheet conveying apparatus, and more particularly to a sheet conveying apparatus that changes the conveying direction of a sheet at a right angle and conveys the sheet.

  As a conventional sheet conveying apparatus of this type, a sheet sent from the first conveying direction is received, and the sheet is changed in the second conveying direction perpendicular to the first conveying direction and conveyed, and the sheet is conveyed during the conveyance. (For example, refer to Patent Document 1).

The sheet conveying apparatus is disposed on one side of the conveying path for conveying the sheet sent out from the first conveying direction in the second conveying direction, and extends along the second conveying direction. An alignment guide, an alignment conveyor belt extending from the upstream side toward the alignment guide with an inclination relative to the second conveying direction, and a direction changing presser ball disposed on the alignment conveyor belt and held rotatably. I have.
According to this sheet conveying apparatus, the sheet fed out from the first conveying direction is introduced between the alignment conveyor belt and the direction changing presser ball, and is pressed against the alignment conveyor belt by its own weight. Then, the sheet is conveyed in the second conveying direction while sliding on the alignment conveyor belt, and one end edge of the sheet abuts the alignment guide throughout the conveyance, thereby correcting the skew of the sheet.

  In this sheet conveying apparatus, in order to convey the sheet quickly and sequentially, the sheet may be sent out from the first conveying direction at a high speed. However, if the sheet is fed out at a high speed, the sheet may not be properly introduced between the alignment conveyor belt and the direction-change presser ball, and may be greatly rebounded as soon as it hits the ball. There was a problem that occurred.

  Further, when the sheet is sent out from the first conveyance direction at a high speed, the sheet may be conveyed to the outlet without being corrected for skew. In order to prevent this, the alignment conveyor belt and the alignment guide must be made sufficiently long, and the sheet conveying apparatus becomes large.

Japanese Patent Application Laid-Open No. 07-97115

  Therefore, the problem to be solved by the present invention is to provide a sheet conveying apparatus having a compact configuration capable of quickly conveying a sheet accompanied by a 90 ° direction change.

In order to solve the above problems, a sheet conveying apparatus according to the present invention changes the direction of a sheet conveyed from a first conveying direction in a second conveying direction perpendicular to the first conveying direction and conveys the sheet. A sheet conveying device for
A frame having an inlet directed in the first transport direction and an outlet directed in the second transport direction;
A direction changing unit attached to the frame and disposed adjacent to the inlet and extending from the inlet toward the outlet along the second conveying direction, the direction changing unit comprising: a sheet; Is conveyed from the inlet to the outlet, correcting the skew of the sheet during the conveyance,
Sending means attached to the frame and disposed at the entrance, and sending out the sheet conveyed from the first conveying direction to the direction changing unit,
The turning unit is
A leading edge of the sheet that is disposed at a predetermined interval from the inlet in the first conveying direction, extends from the inlet to the outlet in the second conveying direction, and is fed by the feeding means. An abutting reference plate;
An adsorption conveyance mechanism that conveys the sheet to the outlet while sliding the sheet along the reference plate while supporting the lower surface of the sheet in the adsorption state;
An abutting guide provided at a predetermined interval from the reference plate and arranged to face the reference plate, extending parallel to the reference plate and capable of moving back and forth in the first transport direction,
The guide drive mechanism for moving the abutment guide,
The sheet is slid by the suction conveyance mechanism, and the abutment guide is moved toward the reference plate with a predetermined stroke so as to abut against the trailing edge of the sheet, and the leading edge of the sheet is stretched over the entire length thereof. The skew of the sheet is corrected by contacting the plate.

Preferably, the suction conveyance mechanism includes:
The inclined roller array is disposed between the inlet and the reference plate, extends in parallel with the reference plate, and supports the lower surface of the sheet. It consists of a plurality of rollers that are arranged in parallel at an interval from each other so as to form an acute angle in the transport direction of
A suction duct is provided below the inclined roller row and arranged in parallel with the reference plate so as to attract the lower surface of the sheet to the inclined roller row.

Preferably, an inlet passage detection sensor that is attached to the frame and disposed at the inlet and detects the passage of a sheet,
The guide driving mechanism moves the abutment guide after a predetermined time has elapsed after the entrance passage detection sensor detects passage of the sheet.

The sheet is a sheet having a single page surface, or a plurality of sheets each having one page surface and arranged in page order perpendicular to the first conveyance direction,
The turning unit further includes:
A plate driving mechanism for moving the reference plate between a first position and a second position offset from the first position in the first transport direction;
Each time the sheets are sequentially fed by the feeding means and conveyed to the outlet in the page order, and the conveyance of one sheet is completed, the plate driving mechanism moves the reference plate to the first position and the first position. It is moved alternately to position 2.

  According to the present invention, the abutment guide is disposed so as to face the reference plate at a predetermined interval from the reference plate with which the leading edge of the sheet fed from the first conveying direction contacts. When the sheet is fed at high speed by the feeding means and hits the reference plate vigorously and bounces back, the trailing edge of the sheet hits the abutment guide, and the bounce is minimized. As a result, the conveyance jam is prevented, and the sheet can be smoothly and quickly turned and conveyed by 90 °.

  Further, according to the present invention, the sheet skew is conveyed by the suction conveying mechanism and the abutting guide is abutted against the trailing edge of the sheet by the guide driving mechanism, thereby correcting the skew of the sheet. The plate and the suction conveyance mechanism can be shortened, and the sheet conveyance device can be made compact.

FIG. 2 is a plan view illustrating a schematic configuration of a sheet conveying apparatus according to the present invention. FIG. 3 is a plan view illustrating a configuration of a main part of the sheet conveying apparatus according to the present invention. 3A and 3B are side views of the sheet conveying apparatus of FIG. 2 as viewed from the second conveying direction, and FIGS. 3A and 3B are diagrams illustrating the abutting operation of the abutting guide with reference to the first position, and FIG. FIG. 3D is a diagram illustrating the abutting operation of the abutting guide with reference to the second position offset in the first transport direction from the first position. It is a top view which shows schematic structure of a guide drive mechanism and a plate drive mechanism. It is a figure which shows the structure of the crank arm for moving the abutting guide back and forth, FIG. 5A is a top view, FIG. 5B is the side view which looked at FIG. 5A from the 1st conveyance direction. It is a top view which shows roughly the structure of the sheet cutting and collation apparatus provided with the sheet conveying apparatus which concerns on this invention.

Hereinafter, a sheet conveying apparatus according to the present invention will be described with reference to the accompanying drawings.
Referring to FIG. 1, the sheet conveying apparatus 5 has a frame having an inlet 8 directed in the first conveying direction X and an outlet 9 directed in a second conveying direction Y perpendicular to the first conveying direction X. 10, an inlet passage detection sensor 11 that is attached to the frame 10 and disposed at the inlet 8 and detects passage of the sheet S, and an outlet passage that is attached to the frame 10 and disposed at the outlet 9 to detect passage of the sheet S And a detection sensor 12.

Further, the sheet conveying apparatus 5 is attached to the frame 10 and is arranged at the inlet 8. The sheet conveying device 5 is attached to the frame 10, is adjacent to the inlet 8, and is arranged along the second conveying direction Y. And a direction changing unit 14 extending from 8 to the exit 9.
The sheet conveying device 5 is arranged at right angles to the first conveying direction X, and sends out a plurality of sheets S conveyed from the first conveying direction X to the direction changing unit 14 by the sending means 13, and the direction changing unit 14, the sheet S is changed in the second conveyance direction Y and conveyed one by one to the outlet 9, and the skew of the sheet S is corrected during the conveyance.

FIG. 2 is a plan view showing the configuration of the main part of the sheet conveying apparatus, and FIG. 3 is a side view of the sheet conveying apparatus of FIG. 2 as viewed from the second conveying direction.
As shown in FIG. 3A, the delivery means 13 includes a horizontal upper guide plate 15 and a lower guide plate 16 for guiding the sheet S (these are not shown in FIG. 2), and these guide plates 15 , 16, the introduction path G for the sheet S is formed. On each of the upstream side and the downstream side of the introduction path G, a pair of drive rollers 17 and idle rollers 18 having a horizontal rotation shaft and arranged in contact with each other are arranged.
The sheet S conveyed from the first conveying direction X is inserted between the pair of upstream rollers 17 and 18 and conveyed between them, and then between the pair of rollers 17 and 18 on the downstream side. They are inserted and conveyed between them, and sent out from the introduction path G to the direction changing unit 14.

Referring to FIGS. 2 and 3, the direction changing unit 14 is arranged at an interval from the inlet 8 in the first transport direction X, and from the inlet 8 to the outlet 9 along the second transport direction Y. A reference plate 19 extending toward the center is provided. Further, the direction changing unit 14 includes a suction conveyance mechanism that extends parallel to the reference plate 19, supports the lower surface of the sheet S in a suction state, and transports the sheet S to the outlet 9 while sliding along the reference plate 19. ing.
The suction conveyance mechanism is disposed between at least the inlet 8 and the reference plate 19, extends parallel to the reference plate 19, and supports an inclined roller row 20 that supports the lower surface of the sheet S fed by the feeding means 13. A suction duct (FIG. 3) 21 is disposed below the roller row 20 and extends parallel to the reference plate 19 to attract the lower surface of the sheet S to the inclined roller row 20.

  The inclined roller row 20 is composed of a plurality of rollers 20a each having a rotation shaft extending so as to form an acute angle with respect to the reference plate 19 in the second transport direction Y and arranged in parallel at intervals. As shown in FIG. 3, the inclined roller row 20 is disposed at a position lower than the introduction path G. The reference plate 19 is supported at both ends in the second transport direction Y by the support member 22, is at a position higher than the inclined roller array 20, and faces the transport path G. The reference plate 19 is positioned according to the size of the sheet S so that the trailing edge B side of the sheet S protrudes from the end of the inclined roller array 20 to a certain extent. The suction duct 21 is supported by the support member 22 and is disposed below the inclined roller row 20.

Although not shown, each roller 20a of the inclined roller array 20 is rotatably attached to the frame 10 (FIG. 1). A sprocket is attached to one end of the rotating shaft of each roller 20a. An endless chain is stretched between the most upstream roller and the most downstream roller sprocket, and the remaining roller sprockets are engaged with the endless chain. In addition, a drive motor is disposed, and the drive shaft of the drive motor is connected to the rotation shaft of the roller on the most upstream side or the most downstream side. Thereby, each roller 20a rotates in synchronization with the drive of the drive motor.
When the suction duct 21 is driven, a suction force is generated in the gap between the rollers 20 a, and the lower surface of the sheet S is attracted to the inclined roller row 20.
The suction duct 21 supports the lower surface of the sheet S to the inclined roller array 20 in an adsorbed state, and the inclined roller array 20 is driven so that the sheet S is adsorbed and conveyed toward the outlet 9 while sliding along the reference plate 19. The

The direction changing unit 14 is further disposed in the vicinity of the inlet 8 at a distance from the reference plate 19 and extends in parallel with the reference plate 19, and the abutment guide 23 is moved back and forth in the first transport direction X. A guide drive mechanism 24 (FIG. 3) for movement. The abutting guide 23 and the guide driving mechanism 24 are used to correct the skew of the sheet S as will be described later.
The abutting guide 23 is disposed so as to face the reference plate 19 with a gap larger than the width of the sheet S from the reference plate 19.

  Referring to FIG. 4, the guide drive mechanism 24 is slidably attached to a pair of slide shafts 25 a and 25 b extending in parallel with the first transport direction X, and the slide shafts 25 a and 25 b. And a supporting member 26 for supporting. A pair of guide holes 27 a and 27 b extending in the second transport direction Y are formed at both ends of the support member 26.

The guide drive mechanism 24 includes crank arms 28a and 28b. FIG. 5A is a plan view of the crank arm, and FIG. 5B is a side view of the crank arm as viewed from the first transport direction.
The crank arms 28a and 28b rotate horizontally extending vertically downward from the arm portions 29a and 29b, pins 30a and 30b provided on the upper surface of one end of the arm portions 29a and 29b, and the other ends of the arm portions 29a and 29b. Shafts 31a and 31b. A drive motor 32 is disposed, and a drive belt 35 is stretched between a pulley 33 attached to the drive shaft of the drive motor 32 and a pulley 34 attached to the rotation shaft 31a of the crank arm 28a. ing. A drive belt 38 is stretched between pulleys 36 and 37 attached to the rotary shafts 31a and 31b of the crank arms 28a and 28b, respectively. As the drive motor 32 is driven, the rotation shafts 31a and 31b of the crank arms 28a and 28b rotate in synchronism with each other, and as shown in FIG. 5A, the pin members 30a and 30b and the arm portions 29a and 29b are in the first conveyance. It pivots between a position perpendicular to the direction X and a position where the arm portions 29a, 29b protrude in the first transport direction X in parallel with the direction.

  Referring again to FIG. 4, the pins 30 a and 30 b of the crank arms 28 a and 28 b are inserted into the guide holes 27 a and 27 b of the support member 26. Then, the pin members 30a and 30b are turned by the drive of the drive motor 32, so that the support member 26 moves back and forth along the slide shafts 25a and 25b. As a result, as shown in FIG. 4A and FIG. The guide 23 moves back and forth in the first transport direction X.

  Referring to FIG. 4, the direction changing unit 14 further moves the reference plate 19 to the first position (FIGS. 3A and 4A) and the second position offset from the first position in the first transport direction X. A plate drive mechanism 39 that moves between the positions (FIGS. 3C and 4B) is provided. The plate drive mechanism 39 includes a pair of slide shafts 40a and 40b extending in parallel with the rollers 20a (FIG. 2) of the inclined roller array 20. A drive motor 41 is disposed, and a drive belt 43 is stretched between a pulley 42 attached to the drive shaft and a pulley attached to the rotary shaft on the other end (not shown), and a slide shaft 40a, It extends parallel to 40b.

  The support member 22 that supports the reference plate 19 and the suction duct 21 is slidably attached to the slide shafts 40 a and 40 b and is also attached to the drive belt 43. When the drive belt 43 is rotated by driving the drive motor 41, the support member 22 moves back and forth along the slide shafts 40a and 40b, whereby the reference plate 19 and the suction duct 21 are moved to the first position (FIGS. 3A and 4A). ) And a second position (FIGS. 3C and 4B) offset in the first transport direction X from the first position.

  Next, the operation of the sheet conveying apparatus 5 will be described with reference to FIGS. The sheet conveying device 5 is arranged at right angles to the first conveying direction X, and sequentially feeds a plurality of sheets S conveyed from the first conveying direction X to the direction changing unit 14 by the feeding means 13. At this time, the passage of the sheet S is detected by the entrance passage detection sensor 11. When the sheet S is thrown out from the introduction path G, its leading edge F hits the reference plate 19 and its lower surface is supported by the inclined roller row 20.

  Then, the sheet conveying device 5 supports the lower surface of the sheet S in the suction state by the suction duct 21 and supports the second roller while sliding the sheet S along the reference plate 19 by the inclined roller row 20. Transport in direction Y. The sheet conveying device 5 reciprocates the abutting guide 23 toward the reference plate 19 by a predetermined stroke amount t by a guide driving mechanism 24 after a predetermined time has elapsed since the entrance passage detection sensor 11 detected the passage of the sheet S. The sheet is moved back and forth (FIG. 3B), abuts against the trailing edge B of the sheet S being conveyed several times, and the leading edge F approaches the reference plate 19. Thus, on the inclined roller row 20, the sheet S slides along the reference plate 19 and is brought close to the reference plate 19 by the abutment guide 23, so that the leading edge F of the sheet S is moved to the reference plate 19 over the entire surface. Abutting, and the skew of the sheet S is corrected. The sheets S are sequentially conveyed one by one to the outlet 9 in a state where the skew is accurately corrected.

  Further, according to the sheet conveying apparatus 5, the plate S is offset in the first conveying direction X by moving the reference plate 19 from the first position to the second position by the plate driving mechanism 39, so that the second conveying is performed. It can be conveyed in the direction Y (FIGS. 3A and 3C). In response to the offset of the reference plate 19 to the second position, the sheet conveying device 5 also causes the abutment guide 23 to be offset by the guide driving mechanism 24 with the same offset amount in the first conveying direction X (FIG. 3C). . Then, the sheet conveying device 5 moves the abutment guide 23 with a predetermined stroke amount t on the basis of the moved position, and abuts against the trailing edge B of the sheet S (FIG. 3D). Thereby, even when the reference plate 19 is offset from the first position to the second position, the skew of the sheet S can be accurately corrected.

  According to the sheet conveying device 5, even when the sheet S is fed at a high speed by the feeding means 13 and hits the reference plate 19 and rebounds greatly, the abutting guide 23 disposed opposite to the reference plate 19 with a space therebetween. And the bounce is minimized. As a result, the occurrence of a conveyance jam is prevented, and the sheet S can be smoothly and quickly turned and conveyed by 90 °.

  Furthermore, according to the sheet conveying device 5, the sheet S is not only slid along the reference plate 19 but also moved toward the reference plate 19 by the abutment guide 23, so that the skew of the sheet S is corrected. The plate 19 and the inclined roller row 20 can be shortened, and the sheet conveying device 5 can be made compact.

In the present embodiment, the plurality of sheets S arranged at right angles to the first transport direction X are sequentially sent out by the sending means 13, but one sheet S may be sent out sequentially by the sending means 13.
Further, in the present embodiment, the abutting guide 23 is abutted against the sheet S a plurality of times at once for correcting the skew of the sheet S, but this may be performed only once.
Further, in the present embodiment, when the reference plate 19 is offset to the second position, the abutment guide 23 is offset, and the sheet S is skewed by moving it with a predetermined stroke amount t based on the offset position. Is corrected. Instead, when the reference plate 19 is offset, the skew guide of the sheet S can be corrected by moving the contact guide 23 by a stroke amount larger than the stroke amount t without offsetting the abutment guide 23.

Next, an embodiment of the sheet cutting and collating apparatus provided with the sheet conveying device 5 according to the present invention will be described.
Referring to FIG. 6, the sheet cutting and collating apparatus sequentially forms sheets S from sheet stack P _{0 formed} by stacking a plurality of sheets S ₀ on which a plurality of page surfaces are impositioned and printed in the vertical and horizontal directions in the page order. _A paper feed unit 1 is provided to supply ₀ one by one.

A first cutting unit 2 is disposed at the subsequent stage of the sheet feeding unit 1, and the first cutting unit 2 converts the sheet S ₀ supplied from the sheet feeding unit 1 into a vertical direction or a horizontal direction of the sheet S _0. Are cut into a plurality of strips each having a page surface arranged in a line in the page order along the second conveyance direction Y.

The first direction changing unit 3 is arranged at the subsequent stage of the first cutting unit 2, and the first direction changing unit 3 receives the sheet S ₁ cut into a strip shape from the first cutting unit 2. , it sends a strip of sheet portion S ₂ in the first conveying direction X one by one.

The second cutting unit 4 is arranged at the subsequent stage of the first direction changing unit 3, and the second cutting unit 4 converts the strip-shaped sheet portion S ₂ received from the first direction changing unit 3 to the second direction. by cutting along the while transporting the second conveying direction Y the second conveying direction Y, dividing strip the sheet portion S ₂ into a plurality of sub-sheets S ₃ having a respective one page surface.

The second direction changing unit 5 including the sheet conveying apparatus according to the present invention is arranged at the subsequent stage of the second cutting unit 4, and the second direction changing unit 5 includes a plurality of sub-directories from the second cutting unit 4. Each time the strip-shaped sheet portion S ₂ divided into the sheets S ₃ is received, the plurality of sub-sheets S ₃ are set to 1 in a direction perpendicular to the first transport direction X (a direction parallel to the second transport direction Y). Send out one by one.

A stack unit 6 is disposed at the subsequent stage of the second direction changing unit 5, and the stack unit 6 sequentially stacks the sub-sheets S ₃ received from the second direction changing unit 5 one by one, and a predetermined number of sheets are placed. forming a set of stack P ₁ of the sub seat S ₃ booklet book worth of the sub seat S ₃ consisting of that engaged.
At least the operation of the second direction changing unit 5 is controlled by the control unit 7.

According to the sheet cutting and collating apparatus, as described above, the plurality of sub-sheets S ₃ each having one page surface and arranged in page order at right angles to the first transport direction X are changed in the second direction. The sheets are sequentially conveyed to the section 5 (sheet conveying apparatus), and conveyed one by one to the stack section 6 in page order. In this case, the sub-sheet with pages surface of the final page of the booklet is set to be positioned at the end of the second conveying direction Y of the sequence of the sub seat S _3.

The second direction changing unit 5 (sheet conveying device) receives at least the number of sheets in the arrangement of the sub-sheets S ₃ (4 in the present embodiment) from a printing unit or control unit 7 (not shown) preceding the paper feeding unit 1. Sheet) and sheet information including the number of pages of one booklet. The second turning portion 5, the inlet passage detecting sensor 11 and the outlet passage detecting sensor 12 detects the passage of the sub seat S _3, the conveyance of the sub-sheet S ₃ in one volume fraction on the basis of the detection signal The end is detected sequentially.

The second turning portion 5 (the sheet conveying device) is moved each time the transport of the book portion of the sub seat S ₃ is finished, alternating reference plate 19 in the first position and the second position by, for conveying the sub seat S ₃ to the stack unit 6. Thereby, the stack unit 6, the laminated body P ₁ which set are stacked are successively offset in the sub seat S ₃ of one volume fraction booklet is formed.

5 Sheet conveying device 8 Inlet 9 Outlet 10 Frame 11 Inlet passage detection sensor 12 Outlet passage detection sensor 13 Delivery means 14 Direction changing unit 19 Reference plate 20 Inclined roller row 20a Roller 21 Suction duct 23 Abutting guide 24 Guide drive mechanism S Sheet F Sheet leading edge B Sheet trailing edge X First transport direction Y Second transport direction

Claims (4)

A sheet conveying device that conveys a sheet conveyed from a first conveying direction by changing a direction in a second conveying direction perpendicular to the first conveying direction,
A frame having an inlet directed in the first transport direction and an outlet directed in the second transport direction;
A direction changing unit attached to the frame and disposed adjacent to the inlet and extending from the inlet toward the outlet along the second conveying direction, the direction changing unit comprising: a sheet; Is conveyed from the inlet to the outlet, correcting the skew of the sheet during the conveyance,
Sending means attached to the frame and disposed at the entrance, and sending out the sheet conveyed from the first conveying direction to the direction changing unit,
The turning unit is
A leading edge of the sheet that is disposed at a predetermined interval from the inlet in the first conveying direction, extends from the inlet to the outlet in the second conveying direction, and is fed by the feeding means. An abutting reference plate;
An adsorption conveyance mechanism that conveys the sheet to the outlet while sliding the sheet along the reference plate while supporting the lower surface of the sheet in the adsorption state;
An abutting guide provided at a predetermined interval from the reference plate and arranged to face the reference plate, extending parallel to the reference plate and capable of moving back and forth in the first transport direction,
The guide drive mechanism for moving the abutment guide,
The sheet is slid by the suction conveyance mechanism, and the abutment guide is moved toward the reference plate with a predetermined stroke so as to abut against the trailing edge of the sheet, and the leading edge of the sheet is stretched over the entire length thereof. A sheet conveying apparatus that corrects skew of a sheet by contacting the plate. The suction conveyance mechanism is
The inclined roller array is disposed between the inlet and the reference plate, extends in parallel with the reference plate, and supports the lower surface of the sheet. It consists of a plurality of rollers that are arranged in parallel at an interval from each other so as to form an acute angle in the transport direction of
The sheet conveying apparatus according to claim 1, further comprising a suction duct that is disposed below the inclined roller row in parallel with the reference plate and attracts the lower surface of the sheet to the inclined roller row. An inlet passage detection sensor attached to the frame and disposed at the inlet to detect passage of a sheet;
3. The sheet conveyance according to claim 1, wherein the guide driving mechanism moves the abutment guide after a predetermined time has elapsed after the entrance passage detection sensor detects the passage of the sheet. apparatus. The sheet is a sheet having a single page surface, or a plurality of sheets each having one page surface and arranged in page order perpendicular to the first conveyance direction,
The turning unit further includes:
A plate driving mechanism for moving the reference plate between a first position and a second position offset from the first position in the first transport direction;
Each time the sheets are sequentially fed by the feeding means and conveyed to the outlet in the page order, and the conveyance of one sheet is completed, the plate driving mechanism moves the reference plate to the first position and the first position. 4. The sheet conveying apparatus according to claim 1, wherein the sheet conveying apparatus is alternately moved to a position of 2. 5.

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