JP5768459B2 - Sheet processing device - Google Patents

Description

  The present invention relates to a sheet processing apparatus, and more particularly to a sheet processing apparatus that performs a folding process on a sheet bundle.

  As a sheet processing apparatus having a conventional tray, for example, a sheet post-processing apparatus described in Patent Document 1 is known. In the sheet post-processing apparatus, a plurality of folded sheet bundles are slightly shifted in a predetermined direction and arranged in a line on the tray. For this reason, the tray is provided with a belt for conveying the sheet bundle, and each time one sheet bundle is output, the output sheet bundle is conveyed on the tray by a predetermined distance in the predetermined direction. Is done.

  However, in the sheet post-processing apparatus described in Patent Document 1, there is a possibility that a stacking defect may occur in the first sheet bundle as described below. FIG. 13 is a diagram illustrating a state in which a stacking failure occurs in the first sheet bundle.

  In the sheet post-processing apparatus, the sheet bundle P is output from obliquely above the tray 500. When the first sheet bundle P is output, the sheet bundle P does not exist on the tray 500. Therefore, the first sheet bundle P contacts the belt 502 of the tray 500. Here, the belt 502 generates a relatively large frictional force with the sheet bundle P in order to convey the sheet bundle P. Therefore, the first sheet bundle P may be caught by the belt 502 and fall forward as shown in FIG. As a result, a stacking failure may occur in the first sheet bundle.

JP 2007-45620 A

  SUMMARY OF THE INVENTION An object of the present invention is to provide a sheet processing apparatus that can prevent a stacking defect from occurring in the first sheet bundle.

A sheet processing apparatus according to a first aspect of the present invention includes a processing unit that performs a folding process on a sheet bundle, and a tray main body having a tray surface on which the plurality of sheet bundles output from the processing unit are placed. A tray including a belt extending in a predetermined direction on the surface of the tray, the transport unit configured to transport the sheet bundle toward a downstream side in a predetermined direction by driving the belt; Control means for outputting the first sheet bundle for the tray main body to the processing section in a state where the belt is driven toward the downstream side in a predetermined direction, and the control means includes the belt Is driven toward the downstream side in a predetermined direction, the second and subsequent sheet bundles for the tray body are output to the processing unit, and the second and subsequent sheet bundles are output. Be Conveying speed of the bets is characterized slower than the conveying speed of the belt when the sheet bundle of the first copy is output.
A sheet processing apparatus according to a second aspect of the present invention includes a processing unit that performs a folding process on a sheet bundle, and a tray main body having a tray surface on which the plurality of sheet bundles output from the processing unit are placed. A tray including a belt extending in a predetermined direction on the surface of the tray, the transport unit configured to transport the sheet bundle toward a downstream side in a predetermined direction by driving the belt; Control means for outputting the first sheet bundle for the tray main body to the processing section in a state where the belt is driven toward the downstream side in a predetermined direction, and the control means includes the belt The second and subsequent sheet bundles for the tray main body are output to the processing section while the second and subsequent sheet bundles are output to the tray main body. It is driven toward the downstream side of the unidirectional, and wherein.
A sheet processing apparatus according to a third aspect of the present invention includes a processing unit that performs a folding process on a sheet bundle, and a tray body that includes a tray surface on which the plurality of sheet bundles output from the processing unit are placed. A tray including a belt extending in a predetermined direction on the surface of the tray, the transport unit configured to transport the sheet bundle toward a downstream side in a predetermined direction by driving the belt; Control means for outputting the first sheet bundle for the tray main body to the processing unit in a state in which the belt is driven toward the downstream side in a predetermined direction, and the tray includes the tray surface. The image processing apparatus further includes second detection means for detecting whether or not the sheet bundle is placed thereon, and the control means is configured to perform processing based on a detection result of the second detection means. To output The paper bundle is determined whether the sheet bundle of the first copy, and wherein.

  According to the present invention, it is possible to suppress a stacking failure from occurring in the first sheet bundle.

It is a block diagram of a sheet processing apparatus. FIG. 6 is a diagram illustrating a sheet processing apparatus when performing a folding process on a sheet bundle P; FIG. 6 is a diagram illustrating a sheet processing apparatus when performing a folding process on a sheet bundle P; FIG. 6 is a diagram illustrating a sheet processing apparatus when performing a folding process on a sheet bundle P; FIG. 6 is a diagram illustrating a sheet processing apparatus when performing a folding process on a sheet bundle P; It is an external appearance perspective view of a tray. FIG. 6 is a diagram illustrating a state where a sheet bundle P is output to a tray. FIG. 6 is a diagram illustrating a state in which a plurality of sheet bundles P are placed on a tray. 6 is a flowchart illustrating an operation performed by a control unit of the sheet processing apparatus. FIG. 6 is a diagram illustrating a state in which a plurality of sheet bundles P are continuously output to the tray body. 6 is a flowchart illustrating an operation performed by a control unit of the sheet processing apparatus. FIG. 6 is a diagram illustrating a state in which a plurality of sheet bundles P are continuously output to the tray body. FIG. 6 is a diagram illustrating a state in which a stacking failure occurs in the first sheet bundle.

  A sheet processing apparatus according to an embodiment of the present invention will be described below with reference to the drawings.

(Configuration of sheet processing apparatus)
First, the configuration of the sheet processing apparatus 10 will be described. FIG. 1 is a configuration diagram of the sheet processing apparatus 10. FIGS. 2 to 5 are views showing the sheet processing apparatus 10 when the sheet bundle P is folded in half. In the following, in FIGS. 1 to 5, the left-right direction is defined as the x-axis direction, the vertical direction on the paper is defined as the y-axis direction, and the up-down direction is defined as the z-axis direction.

  The sheet processing apparatus 10 is used by being connected to an image forming apparatus such as a copying machine, and folds the sheet bundle P composed of a plurality of printed sheets (sheets) P0 output from the image forming apparatus. And stapling. The two-fold process means that the sheet bundle P is folded once so that the sheet bundle P has a half size. The stapling process is a process for driving a stapler into the sheet bundle P. As shown in FIGS. 1 and 2, the sheet processing apparatus 10 includes a main body 12, a roller pair 14, a processing unit 15, a control unit 26, a sensor 28, and a tray 30.

  The main body 12 is a housing of the sheet processing apparatus 10 and houses the processing unit 15, the control unit 26, and the sensor 28.

  The control unit 26 controls the operation of the sheet processing apparatus 10 and is configured by a CPU, for example.

  The roller pair 14 is provided on the side surface of the main body 12 on the negative side in the x-axis direction, and takes in the printed paper P0 output from the image forming apparatus into the main body 12. As shown in FIG. 1, the sheet P0 taken into the main body 12 by the roller pair 14 is conveyed to a stacking tray 16 to be described later by a roller pair and a guide (not shown).

  The processing unit 15 performs a folding process on the sheet bundle P composed of a plurality of sheets P0, and includes a stacking tray 16, a stopper 18, a stapler 20, a chopper 22, and a roller pair 24.

  The stacking tray 16 is a flat plate extending in the z-axis direction in the main body 12 and is slightly inclined so as to advance toward the negative direction side in the x-axis direction as it goes toward the positive direction side in the z-axis direction. On the main surface of the stacking tray 16 on the positive side in the x-axis direction, the captured paper P0 is stacked.

  The stopper 18 aligns the plurality of sheets P0 so that the plurality of sheets P0 stacked on the stacking tray 16 coincide and overlap. Specifically, the stopper 18 has an L-shaped cross-sectional structure and is provided on the stacking tray 16. The plurality of sheets P0 are aligned by sliding down on the stacking tray 16 due to their own weight and coming into contact with the stopper 18. The stopper 18 can be moved on the stacking tray 16 in the z-axis direction.

  The stapler 20 is provided so as to sandwich the stacking tray 16 from both sides in the x-axis direction, and drives staples in the middle in the z-axis direction of the sheet bundle P composed of a plurality of sheets P0.

  The chopper 22 is a plate-like member that performs a folding process on the sheet bundle P that has been stapled. The chopper 22 is provided on the negative side of the stacking tray 16 in the x-axis direction, and is located near the middle of the stacking tray 16 in the z-axis direction. The chopper 22 is configured to be movable in a direction orthogonal to the stacking tray 16, and folds projecting toward the positive direction side in the x-axis direction by contacting the sheet bundle P from the negative direction side in the x-axis direction. Are formed on the sheet bundle P.

  The roller pair 24 plays a role of conveying the sheet bundle P by nipping the sheet bundle P and performing a folding process.

  The sensor 28 is provided in the processing unit 15 and detects the rear end of the sheet bundle P in the transport direction. Specifically, the sensor 28 is provided between the roller pair 24 and the stacking tray 16, and is folded into two by the roller pair 24 and conveyed to the positive side in the x-axis direction. An end on the negative direction side in the x-axis direction is detected.

  The tray 30 is provided on the negative side of the roller pair 24 in the z-axis direction, and a plurality of sheet bundles P output from the roller pair 24 are placed thereon. Details of the tray 30 will be described later.

(Folding process)
Next, the folding process performed by the sheet processing apparatus 10 will be described with reference to the drawings.

  As shown in FIG. 2, the stopper 18 moves from the end of the stacking tray 16 on the negative side in the z-axis direction toward the positive direction in the z-axis direction. As a result, the stapler 20 is positioned in the middle of the sheet bundle P in the z-axis direction. Then, the stapler 20 drives staples on the sheet bundle P.

  Next, as shown in FIG. 3, the stopper 18 moves to the end of the stacking tray 16 on the negative side in the z-axis direction. As a result, the chopper 22 is positioned in the middle of the sheet bundle P in the z-axis direction (that is, the position where the staple is driven).

  As shown in FIG. 4, the chopper 22 contacts the sheet bundle P from the negative side in the x-axis direction, forms a fold in the middle of the sheet bundle P in the z-axis direction, and passes the sheet bundle P between the roller pair 24. Push in. The roller on the positive side in the z-axis direction and the roller on the negative direction side in the z-axis direction of the roller pair 24 rotate clockwise and counterclockwise, respectively. As a result, as shown in FIG. 5, the sheet bundle P is output from the roller pair 24 to the tray 30 in a state where the folding process is performed.

(About the tray)
Next, the configuration of the tray 30 will be described with reference to the drawings. FIG. 6 is an external perspective view of the tray 30. FIG. 7 is a diagram illustrating a state where the sheet bundle P is output to the tray 30. FIG. 8 is a diagram illustrating a state in which a plurality of sheet bundles P are placed on the tray 30.

  As shown in FIGS. 6 to 8, the tray 30 includes a tray body 32, a transport unit 34, and detection units 60 and 61 (see FIGS. 7 and 8).

  The tray main body 32 has a tray surface S on which a plurality of sheet bundles P output from the main body 12 are placed in a line in the x-axis direction, and includes a base portion 32a and a stopper portion 32b. . The base portion 32a has a tray surface S parallel to the xy plane. The stopper portion 32b is a plate-like member that is rotatably attached to the end portion on the positive side in the x-axis direction of the base portion 32a. The tip end of the stopper portion 32b in the x-axis direction is bent toward the positive direction side in the z-axis direction. As a result, when a plurality of sheet bundles P are placed side by side on the tray body 32, the sheet bundle P is prevented from being caught by the stopper portion 32b and falling off from the tray body 32 as shown in FIG. Yes.

  As shown in FIGS. 6 and 7, the transport unit 34 includes belts 62 a and 62 b, a drive unit 80, and four rollers (not shown). The two rollers are provided so as to face both ends of the base portion 32a in the x-axis direction. The belt 62a is stretched between the two rollers. The remaining two rollers are provided so as to face both sides of the base portion 32a in the x-axis direction. The belt 62b is stretched between the remaining two rollers. Thus, the belts 62a and 62b extend in the x-axis direction on the tray surface S. The belt 62a is located closer to the negative side in the y-axis direction than the belt 62b.

  The drive part 80 is comprised with the motor and the gear, and rotates a roller. Accordingly, the belts 62a and 62b move on the tray surface S toward the positive direction side in the x-axis direction. Therefore, the conveyance unit 34 conveys the sheet bundle P placed on the tray surface S toward the positive direction side in the x-axis direction by driving the belts 62a and 62b.

  The detection unit 60 detects whether or not the sheet bundle P is stacked on the tray surface S, and includes actuators 38a and 38b and a sensor 39 as shown in FIG. The actuators 38a and 38b protrude from the tray surface S to the positive side in the z-axis direction when the sheet bundle P does not exist on the tray surface S. On the other hand, when the sheet bundle P is placed on the tray surface S, the actuators 38a and 38b are pressed by the sheet bundle P and retreat from the tray surface S.

  The sensor 39 is provided in the base portion 32a and detects the postures of the actuators 38a and 38b. More specifically, the sensor 39 detects that the actuators 38a and 38b have retreated from the tray surface S, and detects that the sheet bundle P exists on the tray surface S. Based on the detection result of the detection unit 60, the control unit 26 determines whether or not the sheet bundle P output from the processing unit 15 is the first sheet bundle P.

  The detection unit 61 detects that the tray surface S is full of the sheet bundle P, and includes an actuator 50 and a sensor 52 as shown in FIG. When the tray surface S is not full of the sheet bundle P, the actuator 50 moves from the tray surface S to the z surface near the end of the tray surface S on the positive side in the x-axis direction as shown in FIG. It protrudes to the positive side in the axial direction. On the other hand, when the tray surface S is filled with the sheet bundle P, the actuator 50 is pressed by the sheet bundle P and retracts from the tray surface S as shown in FIG.

  The sensor 52 is provided in the base portion 32 a and detects the posture of the actuator 50. More specifically, the sensor 52 detects that the actuator 50 has been retracted from the tray surface S, and detects that the tray surface S is full of the sheet bundle P. The control unit 26 determines whether or not the tray surface S is full of the sheet bundle P based on the detection result of the detection unit 61.

  In the sheet processing apparatus 10 configured as described above, the first sheet with respect to the tray main body 32 in a state where the belts 62a and 62b are driven toward the positive side in the x-axis direction, as described below. The bundle P is output to the processing unit 15. As a result, the occurrence of stacking failure in the first sheet bundle P is suppressed. The first sheet bundle P for the tray body 32 means the sheet bundle P that is first output to the tray body 32 in a state where the sheet bundle P is not placed on the tray body 32.

(Operation of sheet processing device)
Next, operations performed by the sheet processing apparatus 10 will be described with reference to the drawings. FIG. 9 is a flowchart illustrating an operation performed by the control unit 26 of the sheet processing apparatus 10. FIG. 10 is a diagram illustrating a state in which a plurality of sheet bundles P are continuously output to the tray main body 32.

  This process is started when the user operates the operation unit of the image forming apparatus to which the sheet processing apparatus 10 is connected. The control unit 26 determines whether or not the sheet bundle P has already been placed on the tray surface S (step S1). That is, the control unit 26 determines whether or not the sheet bundle P to be output from the processing unit 15 is the first sheet bundle P for the tray body 32. In step S <b> 1, the control unit 26 determines the presence or absence of the sheet bundle P by determining whether or not the sensor 39 has detected that the actuator 38 is retracted from the tray surface S. When the sensor 39 does not detect the retracting of the actuator 38, the control unit 26 does not place the sheet bundle P on the tray surface S (that is, the sheet bundle P is the first sheet bundle P). Is determined). In this case, the process proceeds to step S2. When the sensor 39 detects the retracting of the actuator 38, the control unit 26 has the sheet bundle P placed on the tray surface S (that is, the sheet bundle P is the second and subsequent sheet bundles P). ). In this case, the process proceeds to step S5.

  When the sheet bundle P is not placed on the tray surface S, the control unit 26 causes the driving unit 80 to drive the belts 62a and 62b toward the positive side in the x-axis direction at the conveyance speed V1 (step S2). .

  Next, as illustrated in FIG. 10A, the control unit 26 causes the processing unit 15 to perform folding processing and stapling processing on the first sheet bundle P, and then applies the first copy to the roller pair 24. The sheet bundle P is output to the tray body 32 (step S3). Since the folding process and the stapling process have already been described with reference to FIGS. 2 to 5, further detailed description thereof will be omitted. In step S3, as shown in FIG. 10A, the control unit 26 drives the belts 62a and 62b toward the positive side in the x-axis direction and the first copy with respect to the tray main body 32. The sheet bundle P is output to the processing unit 15. The sensor 28 detects the rear end in the transport direction of the first sheet bundle P when the processing unit 15 outputs the first sheet bundle P. Further, when the sheet bundle P is output to the tray main body 32, the sheet bundle P falls on the detection unit 60. Therefore, the detection unit 60 detects that the sheet bundle P is placed on the tray surface S.

  Next, after the predetermined time T1 has elapsed since the sensor 28 detected the rear end in the transport direction of the first sheet bundle P, the control unit 26, as shown in FIG. , 62b is stopped by the drive unit 80 (step S4). In addition, between step S3 and step S4, the sheet bundle P is conveyed to the positive direction side in the x-axis direction. However, the detection unit 60 still detects that the sheet bundle P is placed on the tray surface S. Thereafter, the process proceeds to step S8.

  When the sheet bundle P is placed on the tray surface S, the control unit 26 moves the belts 62a and 62b to the drive unit 80 toward the positive side in the x-axis direction as shown in FIG. Driven at the transport speed V2 (step S5). The conveyance speed V1 is slower than the conveyance speed V2.

  Next, as illustrated in FIG. 10D, the control unit 26 causes the processing unit 15 to perform folding processing and stapling processing on the second sheet bundle P, and then causes the roller pair 24 to apply the second copy. The sheet bundle P is output to the tray body 32 (step S6). Since the folding process and the stapling process have already been described with reference to FIGS. 2 to 5, further detailed description thereof will be omitted. In step S6, as shown in FIG. 10 (d), the control unit 26 drives the belts 62a and 62b toward the positive side in the x-axis direction with respect to the tray main body 32. The sheet bundle P is output to the processing unit 15. The sensor 28 detects the rear end in the transport direction of the second sheet bundle P when the processing unit 15 outputs the second sheet bundle P.

  Next, after a predetermined time T2 longer than the predetermined time T1 has elapsed since the sensor 28 detected the trailing end of the first sheet bundle P in the conveyance direction, the control unit 26 changes to FIG. As shown, the driving of the belts 62a and 62b is stopped by the driving unit 80 (step S7). Note that the sheet bundle P is transported to the positive direction side in the x-axis direction between step S6 and step S7. However, the detection unit 60 still detects that the sheet bundle P is placed on the tray surface S. Thereafter, the process proceeds to step S8.

  In step S8, the control unit 26 determines whether or not to end this process (step S8). More specifically, the control unit 26 determines whether or not all the sheet bundles P to be output in one job have been output. When all the sheet bundles P are output, this process ends. If all the sheet bundles P have not been output, the process proceeds to step S9.

  When all the sheet bundles P are not output, the control unit 26 determines whether or not the tray body 32 is full with the sheet bundle P (step S9). More specifically, the control unit 26 determines whether or not the sensor 52 detects that the actuator 50 is pushed down and retracted. When the actuator 50 is retracted, the control unit 26 determines that the tray body 32 is full with the sheet bundle P. In this case, this process ends. On the other hand, when the actuator 50 is not retracted, the control unit 26 determines that the tray body 32 is not full of the sheet bundle P. In this case, the process returns to step S1.

(effect)
As described above, according to the sheet processing apparatus 10, it is possible to suppress a stacking failure from occurring in the first sheet bundle P. More specifically, the first sheet bundle P for the tray body 32 is output to the processing unit 15 with the belts 62a and 62b being driven toward the positive side in the x-axis direction. As a result, the first sheet bundle P collides with the belts 62a and 62b driven toward the positive side in the x-axis direction. Therefore, as shown in FIG. 7, the first sheet bundle P tends to rotate clockwise around the contact point with the belts 62a and 62b. As a result, the sheet bundle P is prevented from being caught by the belts 62a and 62b and falling to the positive side in the x-axis direction. That is, it is possible to prevent the stacking failure from occurring in the first sheet bundle P.

  Further, in the sheet processing apparatus 10, the conveyance speed V2 of the belts 62a and 62b when the second and subsequent sheet bundles P are output is the same as that of the belts 62a and 62b when the first sheet bundle P is output. It is slower than the conveyance speed V1. Since the second and subsequent sheet bundles P fall on the sheet bundle P output immediately before, the possibility of falling to the positive direction side in the x-axis direction unlike the first sheet bundle P is low. Therefore, the conveyance speed V2 can be made slower than the conveyance speed V1. If the conveyance speed V2 is slowed down, the amount of overlap between the sheet bundles P increases, so that more sheet bundles P can be stacked on the tray body 32. In the sheet processing apparatus 10, in order to bring the overlapping amount of the first sheet bundle P and the second sheet bundle P close to the overlapping amount of the second and subsequent sheet bundles P, The predetermined time T2 for driving 62b at the transport speed V2 is longer than the predetermined time T1 for driving the belts 62a and 62b at the transport speed V1.

(Modification)
Next, an operation according to a modification of the sheet processing apparatus 10 will be described with reference to the drawings. FIG. 11 is a flowchart illustrating an operation performed by the control unit 26 of the sheet processing apparatus 10. FIG. 12 is a diagram illustrating a state in which a plurality of sheet bundles P are continuously output to the tray main body 32.

  This process is started when the user operates the operation unit of the image forming apparatus to which the sheet processing apparatus 10 is connected. The control unit 26 determines whether or not the sheet bundle P has already been placed on the tray surface S (step S11). Since step S11 is the same as step S1, description thereof is omitted. If the sheet bundle P is not placed on the tray surface S, the process proceeds to step S12. If the sheet bundle P is placed on the tray surface S, the process proceeds to step S15.

  When the sheet bundle P is not placed on the tray surface S, the control unit 26 causes the driving unit 80 to drive the belts 62a and 62b toward the positive side in the x-axis direction at the conveyance speed V1 (step S12). .

  Next, as illustrated in FIG. 12A, the control unit 26 causes the processing unit 15 to perform folding processing and stapling processing on the first sheet bundle P, and then applies the first copy to the roller pair 24. The sheet bundle P is output to the tray body 32 (step S13). Since step S13 is the same as step S3, description thereof is omitted.

  Next, after the predetermined time T11 has elapsed since the sensor 28 detected the trailing end of the first sheet bundle P in the transport direction, the control unit 26, as shown in FIG. , 62b is stopped by the drive unit 80 (step S14). Since step S14 is the same as step S4, description thereof is omitted. Thereafter, the process proceeds to step S19.

  When the sheet bundle P is placed on the tray surface S, the control unit 26 causes the processing unit 15 to perform folding processing and stapling processing on the second sheet bundle P as shown in FIG. After that, the second sheet bundle P is outputted to the tray body 32 by the roller pair 24 (step S15). Since the folding process and the stapling process have already been described with reference to FIGS. 2 to 5, further detailed description thereof will be omitted. In step S15, as shown in FIG. 12C, the control unit 26 causes the tray body 32 to output the second sheet bundle P to the processing unit 15 with the belts 62a and 62b stopped. . The sensor 28 detects the rear end in the transport direction of the second sheet bundle P when the processing unit 15 outputs the second sheet bundle P.

  Next, as shown in FIG. 12D, the control unit 26 determines whether or not the output of the second sheet bundle P to the tray body 32 has been completed (step S16). In step S <b> 16, the control unit 26 determines whether a predetermined time has elapsed since the sensor 28 detected the rear end of the second sheet bundle P in the transport direction. The predetermined time is longer than the time from when the sensor 28 detects the trailing end of the second sheet bundle P in the transport direction until the second sheet bundle P falls on the tray main body 32. When the output is completed, the process proceeds to step S17. If the output has not been completed, the process returns to step S16.

  When the output is completed, as shown in FIG. 12E, the control unit 26 causes the drive unit 80 to drive the belts 62a and 62b toward the positive side in the x-axis direction at the conveyance speed V1 (step S17). . That is, the control unit 26 drives the belts 62a and 62b toward the positive side in the x-axis direction after the second sheet bundle P is output to the tray body 32.

  Next, the control unit 26 drives the belts 62a and 62b after a predetermined time T12 that is longer than the predetermined time T11 has elapsed after the sensor 28 detects the trailing end of the second sheet bundle P in the transport direction. Is stopped by the drive unit 80 (step S18). In addition, between step S17 and step S18, the sheet bundle P is transported to the positive direction side in the x-axis direction. However, the detection unit 60 still detects that the sheet bundle P is placed on the tray surface S. Thereafter, the process proceeds to step S19.

  In step S19, the control unit 26 determines whether or not to end this process (step S19). More specifically, the control unit 26 determines whether or not all the sheet bundles P to be output in one job have been output. When all the sheet bundles P are output, this process ends. If all the sheet bundles P have not been output, the process proceeds to step S20.

  When all the sheet bundles P are not output, the control unit 26 determines whether or not the tray body 32 is full with the sheet bundles P (step S20). More specifically, the control unit 26 determines whether or not the sensor 52 detects that the actuator 50 is pushed down and retracted. When the actuator 50 is retracted, the control unit 26 determines that the tray body 32 is full with the sheet bundle P. In this case, this process ends. On the other hand, when the actuator 50 is not retracted, the control unit 26 determines that the tray body 32 is not full of the sheet bundle P. In this case, the process returns to step S11.

  Even in the sheet processing apparatus 10 that performs the operation according to the above-described modified example, it is possible to suppress the stacking failure from occurring in the first sheet bundle P.

(Other embodiments)
The sheet processing apparatus according to the present invention is not limited to the sheet processing apparatus 10 according to the embodiment, and can be changed within the scope of the gist thereof.

  In the sheet processing apparatus 10, the control unit 26 may adjust the overlap amount of the sheet bundle P by adjusting the conveyance speeds V1 and V2 and the predetermined times T1, T2, T11, and T12.

  In addition, the control unit 26 may adjust the predetermined times T1, T2, T11, and T12 according to the size of the paper P0 and the number of sheets P to be output in one job.

  As described above, the present invention is useful for a sheet processing apparatus, and is particularly excellent in that it is possible to suppress a stacking failure from occurring in the first sheet bundle.

P Sheet bundle P0 Paper S Tray surface 10 Sheet processing device 12 Main body 14, 24 Roller pair 15 Processing unit 16 Loading tray 18 Stopper 20 Stapler 22 Chopper 26 Control unit 28 Sensor 30 Tray 32 Tray main body 32a Base unit 32b Stopper unit 34 Conveying unit 38a, 38b, 50 Actuator 39, 52 Sensor 60, 61 Detection unit 62a, 62b Belt 80 drive unit

Claims (5)

A processing unit for performing a folding process on the sheet bundle;
Conveying means including a tray main body having a tray surface on which the plurality of sheet bundles output from the processing unit are placed, and a belt extending in a predetermined direction on the tray surface, and driving the belt A tray including a sheet conveying unit that conveys the sheet bundle toward the downstream side in a predetermined direction,
Control means for causing the processing unit to output the first sheet bundle for the tray body in a state in which the belt is driven toward the downstream side in a predetermined direction;
Equipped with a,
The control means, in a state where the belt is driven toward the downstream side in a predetermined direction, causes the processing unit to output the second and subsequent sheet bundles with respect to the tray body,
The belt conveying speed when the second and subsequent sheet bundles are output is slower than the belt conveying speed when the first sheet bundle is output;
A sheet processing apparatus. The sheet processing apparatus includes:
First detection means provided in the processing unit and detecting a rear end in the conveyance direction of the sheet bundle,
In addition,
The control means stops the driving of the belt after a first predetermined time has elapsed since the first detection means has detected the trailing end of the first sheet bundle in the conveyance direction, The belt is driven after a second predetermined time longer than the first predetermined time has elapsed since the first detection means detected the trailing end of the second and subsequent sheet bundles in the conveyance direction. Stopping,
The sheet processing apparatus according to claim 1 . A processing unit for performing a folding process on the sheet bundle;
Conveying means including a tray main body having a tray surface on which the plurality of sheet bundles output from the processing unit are placed, and a belt extending in a predetermined direction on the tray surface, and driving the belt A tray including a sheet conveying unit that conveys the sheet bundle toward the downstream side in a predetermined direction,
Control means for causing the processing unit to output the first sheet bundle for the tray body in a state in which the belt is driven toward the downstream side in a predetermined direction;
Equipped with a,
The control unit causes the processing unit to output the second and subsequent sheet bundles to the tray main body while the belt is stopped, and outputs the second and subsequent sheet bundles to the tray main body. And driving the belt toward the downstream side in a predetermined direction,
A sheet processing apparatus. The sheet processing apparatus includes:
First detection means provided in the processing unit and detecting a rear end in the conveyance direction of the sheet bundle,
In addition,
The control means stops the driving of the belt after a first predetermined time has elapsed since the first detection means has detected the trailing end of the first sheet bundle in the conveyance direction, The belt is driven after a second predetermined time longer than the first predetermined time has elapsed since the first detection means detected the trailing end of the second and subsequent sheet bundles in the conveyance direction. Stopping,
The sheet processing apparatus according to claim 3 . A processing unit for performing a folding process on the sheet bundle;
Conveying means including a tray main body having a tray surface on which the plurality of sheet bundles output from the processing unit are placed, and a belt extending in a predetermined direction on the tray surface, and driving the belt A tray including a sheet conveying unit that conveys the sheet bundle toward the downstream side in a predetermined direction,
Control means for causing the processing unit to output the first sheet bundle for the tray body in a state in which the belt is driven toward the downstream side in a predetermined direction;
Equipped with a,
The tray further includes second detection means for detecting whether or not the sheet bundle is placed on the tray surface;
The control means determines, based on a detection result of the second detection means, whether or not the sheet bundle output from the processing section is the first sheet bundle;
A sheet processing apparatus.

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