JP2021098558A - Sheet loading device - Google Patents

Abstract

To provide a sheet loading device capable of giving again stiffness to a sheet whose stiffness has been released.SOLUTION: An exit roller 48 introduces the sheet conveyed from a conveying path 42 by a conveying roller 44 into a processing tray 54 located on a downstream side. Then, the exit roller discharges the sheet on the processing tray to a first loading tray 24 located downstream of the processing tray. The exit roller can be moved to a conveying position for conveying the sheet and a separated position away from the sheet. When the sheet conveyed to the processing tray is supported across the first loading tray and the processing tray, and when the exit roller has moved from the conveying position to the separated position, an upper surface position of the first loading tray is moved to a position equal to or higher than an upper surface height of the processing tray, before the sheet is discharged to the first loading tray by the exit roller, or after the exit roller moves to the conveying position where the sheet is conveyed by an exit roller moving arm.SELECTED DRAWING: Figure 11

Description

The present invention relates to an apparatus for loading a sheet ejected from an image forming apparatus such as a copier or a printer, and more particularly to a mechanism for post-processing an image-formed sheet and then ejecting the sheet onto a loading tray and its control.

Conventionally, it has been known that when the sheets carried out from the image forming apparatus are sequentially loaded on the tray of the loading means, the sheets are stiffened and then discharged. By ejecting the sheet with stiffness in this way, when the sheet is ejected onto the tray, the sheet already loaded on the tray and the newly ejected sheet come into irregular contact with each other. It is possible to reduce the loading defects caused by the above.

Further, when switching back from the processing tray for performing post-processing such as binding to the sheet to the loading means, the height of the loading means is increased, and when discharging to the loading means, the height of the loading means is lowered. The technique is also known (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2005-60092

Here, in the apparatus disclosed in Patent Document 1, the sheet transported to the processing tray is a second transport means for transporting the sheet from the processing tray to the loading means side in order to accept or shift the next sheet. (Roller pair) are separated.

For this reason, the stiffness provided by the second transport means is released at the same time as the separation, and when the paper is discharged to the loading means, the hanging sheet comes into contact with the already loaded paper of the loading means and comes into contact with the already loaded sheet. When the area becomes large, there is a problem that the paper is stuck to the already loaded paper or the sheet on the tray of the loading means is pushed out, causing a loading defect on the tray.

An object of the present invention is to provide a seat loading device capable of reapplying the elasticity released in this way to a seat.

In order to solve the above problems, the sheet loading device according to the present invention includes a transport path for receiving and guiding the sheet, a first transport means for transporting the sheet in a predetermined transport direction along the transport path, and the transport direction. A processing tray located on the downstream side of the first transport means and provided with a support portion that receives and supports a plurality of sheets transported by the first transport means to form a sheet bundle, and the process in the transport direction. A second transport means located downstream of the tray and transporting the sheet bundle formed by the processing tray from the processing tray in the transport direction, and downstream of the processing tray and the second transport means in the transport direction. A loading section that is located, supports the sheet received by the processing tray and the sheet bundle formed by the processing tray together with the processing tray, and loads the sheet bundle transported from the processing tray by the second transport means. A loading means provided, a first moving means for moving the second transport means to a transport position in contact with the sheet bundle for transporting the sheet bundle, and a separated position away from the sheet bundle, and the first movement. With the means moving the second transporting means to the transporting position, the stiffening means for firming the sheet bundle, the second moving means for moving the loading means in the vertical direction, and the processing tray are the first. When the sheet conveyed by the 1 conveying means is received, the second conveying means is moved to the separated position, and the loading portion of the loading means is vertically oriented before the second conveying means conveys the sheet bundle. The first moving means and the controlling means for controlling the second moving means are provided in order to carry out the moving process of moving the processing tray to a position higher than the extension line of the support portion.

In a certain embodiment, the first conveying means includes a basis weight recognizing means for recognizing the basis weight of the sheet to be conveyed, and the basis weight recognizing means recognizes that the basis weight of the sheet is equal to or less than a predetermined value. In this case, the control means is suitable for reapplying the loading means according to the basis weight of the sheet by controlling the first moving means and the second moving means in order to carry out the moving process. It is adjusted to a high position.

Further, in a certain embodiment, the length recognizing means for recognizing the length of the sheet to be conveyed by the first conveying means in the conveying direction is further provided, and the length of the sheet is determined by the length recognizing means. When it is recognized that the value is equal to or higher than the value, the control means controls the first moving means and the second moving means in order to carry out the moving process, so that the loading means is stiffened according to the length of the sheet. Is adjusted to an appropriate height position for reapplying.

Further, in a certain embodiment, the sheet number recognizing means for recognizing the number of sheets forming the sheet bundle formed by the processing tray is further provided, and the sheet number recognizing means comprises the sheet forming the sheet bundle. When it is recognized that the number of sheets is equal to or less than a predetermined value, the control means controls the first moving means and the second moving means in order to carry out the moving process, so that the loading means can be loaded according to the number of sheets. It is adjusted to an appropriate height position to re-give the stiffness.

When the basis weight recognizing means recognizes that the basis weight of the sheet exceeds the predetermined value, the control means measures the loading portion of the loading means when the second conveying means conveys the sheet bundle. The second moving means is controlled so as to move the loading portion of the loading means to a height position above the predetermined position in the vertical direction and less than an extension line of the support portion of the processing tray in the vertical direction.

Then, when the length recognizing means recognizes that the length of the sheet is less than a predetermined value, the control means of the loading unit of the loading means when the second transporting means conveys the bundle of sheets. The second moving means is controlled so as to move the loading portion of the loading means to a height position above the predetermined position in the vertical direction and less than an extension line of the support portion of the processing tray in the vertical direction.

Further, when the number of sheets recognizing means recognizes that the number of sheets constituting the bundle of sheets exceeds a predetermined value, the control means of the control means of the loading means when the second conveying means conveys the bundle of sheets. The second moving means for moving the loading portion of the loading means to a height position vertically above the predetermined position of the loading portion and below the extension line of the support portion of the processing tray in the vertical direction. To control.

Here, the control means moves the second transport means to the transport position before the second transport means transports the sheet bundle, and then moves the load portion of the load means to the processing tray in the vertical direction. The first moving means and the second moving means are controlled so as to move from a height position less than the extension line of the support portion to a height position equal to or higher than the extension line in the vertical direction.

Then, before the second transporting means conveys the sheet bundle, the control means vertically moves the loading portion of the loading means vertically from a height position equal to or higher than an extension line of the support portion of the processing tray. The first moving means and the second moving means are controlled so as to move to a height position less than the extension line in the direction.

According to the present invention, when the second transport means is separated by being transported to the processing tray, the height position of the loading means is moved to a position equal to or higher than the height of the upper surface of the processing tray to prevent the sheet from hanging down. Then, the stiffness can be re-added to the sheet whose stiffness has been released. Therefore, when the sheet is discharged from the processing tray to the loading means, the contact area of the already loaded paper on the loading means can be reduced, so that extrusion can be suppressed and the loading property can be improved.

An explanatory diagram of an overall configuration in which the image forming apparatus and the sheet loading apparatus according to the present invention are combined is shown. An overall explanatory view of a sheet loading device including an end face binding unit and a saddle stitching unit according to the present invention is shown. The enlarged side view around the end face binding part is shown. The drive explanatory view of the transfer roller, the outlet roller and the branch roller is shown. An explanatory diagram of the elevating mechanism of the first loading tray and the stop position of the tray is shown. An explanatory diagram of the configuration near the outlet roller is shown. It is explanatory drawing of the standby transfer of a sheet for storing in a processing tray, and the stop position of the 1st loading tray, (a) shows the explanatory view which starts the switchback in the transfer path, and (b) continues from the transfer path. An explanatory diagram of the state of transportation to the branch route is shown. FIG. 7 is an explanatory diagram of the standby transfer operation following FIG. 7, in which (a) shows an explanatory diagram in which the preceding sheet is made to stand by in the branch path and the next sheet is being carried in, and (b) is the next sheet and the waiting preceding sheet. An explanatory diagram for starting the transportation is shown at the same time. In the standby transport operation explanatory view following FIG. 8, (a) shows an explanatory view of a state in which the preceding sheet and the next sheet are stored together, and (b) is a state in which the third sheet is continuously carried in. An explanatory diagram is shown. Following FIG. 9, it is an explanatory view of the state of the seat being stiffened when the outlet rollers are separated, and FIG. 9A shows an explanatory view of the state where the sheet is stiffened immediately before the outlet rollers are separated. b) shows an explanatory diagram of the state when the stiffness after separation is released. Following FIG. 10, it is an operation explanatory view of the 1st loading tray after the stiffness is released, and FIG. 10A shows an explanatory diagram of a state in which the 1st loading tray is raised after the outlet rollers are separated from each other. Shows an explanatory diagram of a state in which the outlet roller raises the first loading tray after re-niping. Following FIG. 11, it is an explanatory view after the first loading tray is raised to re-give the stiffness, and FIG. 11A shows a state explanatory view in which the first loading tray is lowered to the seat receiving position. (B) shows a state explanatory diagram in which the sheet is then discharged to the first loading tray. An explanatory diagram of a flow of whether or not to raise the first loading tray and perform an operation of re-giving stiffness is shown. The flow explanatory drawing which changes the height position of the 1st loading tray to be stiff is shown. An explanatory diagram of the shape of the first loading tray having a shape that promotes the curved portion of the stiffness is shown.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an overall configuration diagram showing an image forming system including an image forming device A and a sheet loading device B according to the present invention, and FIG. 2 is an explanatory view of a detailed configuration of the sheet loading device B.

[Configuration of image formation system]
The image forming system shown in FIG. 1 is composed of an image forming device A and a sheet loading device B. Then, the carry-in port 30 of the sheet loading device B is connected to the main body discharge port 3 of the image forming device A, and the sheet image-formed by the image forming device A is stapled by the sheet loading device B to the first loading tray 24 or the first. 2 It is configured to be stored in the loading tray 26. Further, above the first loading tray 24, an escape tray 22 for directly storing the seats without binding processing is arranged.

[Configuration of image forming apparatus]
The image forming apparatus A will be described with reference to FIG. The image forming apparatus A is configured to send a sheet from the paper feeding unit 1 to the image forming unit 2, print on the sheet by the image forming unit 2, and then discharge the sheet from the main body discharge port 3. In the paper feed unit 1, a plurality of sizes of sheets are stored in the paper feed cassettes 1a and 1b, and the designated sheets are separated one by one and fed to the image forming unit 2.

In the image forming unit 2, for example, an electrostatic drum 4, a print head (laser light emitter) 5 and a developing device 6 arranged around the electrostatic drum 4, a transfer charger 7, and a fixing device 8 are arranged. The image forming unit 2 forms an electrostatic latent image on the electrostatic drum 4 with a laser light emitter 5, adheres toner to the electrostatic latent image with a developing device 6, transfers an image on a sheet with a transfer charger 7, and fixes the image. Heat-fixed at step 8 to form an image.

The sheets image-formed in this way are sequentially carried out from the main body discharge port 3. FIG. 9 shows a circulation path, in which the sheet printed on the front surface side from the fuser 8 is turned upside down via the switchback path 10 and then fed to the image forming unit 2 again to be printed on the back surface side of the sheet. This is the printing route. The sheet printed on both sides in this way is turned upside down on the switchback path 10 and then carried out from the main body discharge port 3.

The image reader scans the document sheet set on the platen 12 with the scan yut 13 and electrically reads it with a photoelectric conversion element (not shown). This image data is digitally processed by the image processing unit, for example, and then transferred to the data storage unit 14 to send an image signal to the laser light emitter 5. Further, the document feeder feeds the document sheet housed in the document stacker 16 to the platen 12.

The image forming apparatus A having the above configuration is provided with, for example, an image forming control unit 200, and image forming conditions such as sheet size designation, color / monochrome printing designation, and number of print copies designation are provided from the control panel 18 via the input unit 203. Printing conditions such as single-sided / double-sided printing designation and enlargement / reduction printing designation are set.

Further, in the image forming apparatus A, the image data read by the scan unit 13 or the image data transferred from the external network is stored in the data storage 40 unit 17. Image data is transferred from the data storage unit 17 to the buffer memory 19, and data signals are sequentially transferred from the buffer memory 19 to the laser emitter 5.

From the control panel 18, sheet processing conditions are input and specified at the same time as image formation conditions such as single-sided / double-sided printing, enlargement / reduction printing, and monochrome / color printing. For this sheet processing condition, for example, "printout mode", "end face binding mode", "saddle stitching mode" and the like are set. These processing conditions will be described later.

[Structure of sheet loading device B]
As shown in FIGS. 1 and 2, the sheet loading device B integrates a sheet carry-in port 30 provided on one side of the device frame 20 and a single sheet or a relatively thick sheet provided on the opposite side. The escape tray 22 is arranged. Below the escape tray 22, a first loading tray 24 that can be raised and lowered for accumulating sheets that have been subjected to end face binding and a relatively large amount of sheets is located. Further, below the first loading tray 24, a second loading tray 26 for accumulating saddle-stitched or folded sheets is provided. In the present invention, the end face means a surface around the end portion of the sheet, that is, the front and back surfaces of the seat edge portion.

[Sheet transport route]
A transport path 42 extending substantially linearly from the carry-in path 32 to the exit 50 is arranged from the carry-in inlet 30 of the sheet loading device B. A punch unit 31 is provided in the carry-in path 32, and punches are performed on the end face of the sheet and, if necessary, in the middle of the transport direction. Below the carry-in path 32 of the punch unit 31, a punch dust box 31b for collecting punch scraps generated during punch processing is detachably provided on the apparatus frame 20.

A carry-in roller 34 for transporting the sheet is arranged on the downstream side of the punch unit 31 to transport the sheet at high speed. A sheet is transported in the transport direction together with the carry-in roller 34 to the transport path 42 on the downstream side of the carry-in roller 34, and the sheet is transported to the processing tray 54 which is the first tray and the first loading tray 24 (loading) on the downstream side in the transport direction. A transport roller 44 (first transport means) capable of forward / reverse rotation that leads to the means) is provided. Behind the transfer roller 44 is a sheet transfer path outlet 46.

An outlet roller 48 (second transport means) capable of forward and reverse rotation is provided on the downstream side of the transport path outlet 46. The outlet roller 48 switches back the sheet and conveys the sheet to the processing tray 54, conveys the sheet in the conveying direction and discharges the sheet straight to the first loading tray 24, or is accumulated in the processing tray 54. The bundle of sheets bound by the end face is conveyed in the conveying direction and discharged to the first loading tray 24.

[Escape route, branch route]
Further, the transport path 42 is branched into an escape path 38 that guides the sheet to the escape tray 22 and a branch path 70 that guides the relatively long sheet to the stacker 84 that is the second tray for saddle stitching and folding. It is branched at 36.

At the branch position 36, switching of a route for selecting whether to transport the sheet as it is to the transport path 42, to transport to the escape path 38, or to switch back on the transport path 42 to guide the sheet to the branch path 70. A gate 37 is provided. The escape path 38 is provided with an escape roller 39 for conveying the sheet and an escape outlet roller 40 for discharging the sheet to the escape tray 22.

[End face binding part 60]
By the way, a processing tray 54 is provided below the transport path outlet 46 of the transport path 42, and an end face binding portion 60 for binding the end faces of the sheets temporarily accumulated on the processing tray 54 is located on the lower end side thereof. The end face binding portion 60 will be described later with reference to FIG.

[Saddle stitching part 80]
On the other hand, a relatively long sheet is once transported in the direction of the processing tray 54 through the above-mentioned transport path 42, transported to the downstream side of the switching gate 37, and then switched back and transported to the branch path 70 from the branch outlet 76. It is accumulated in the stacker 84 (second tray).

As shown in FIG. 2, at the branch outlet 76, every time a sheet is carried from the branch outlet roller 74 to the stacker 84, the sheet is urged to the left side of the drawing to prevent a collision between the rear end of the preceding sheet and the tip of the next sheet. A flapper 78 is provided.

[Stacker (2nd processing tray / 2nd tray) and surroundings]
A stopper 85 that defines a seat loading position is located on the stacker 84. The stopper 85 moves in the direction of the arrow shown by driving the moving belts stretched on the upper pulley 86 and the lower pulley 87 on the side of the stacker 84 by the stopper moving motor 85M. The position of the stopper 85 is a position where the rear end of the sheet can be changed by the above-mentioned change flapper 78 when the sheet is carried into the stacker 84, a position where saddle stitching is performed by the saddle stitching unit 82 at substantially the center of the sheet transport direction, and The saddle-stitched position is pushed by the folding blade 94 that reciprocates with the folding rollers 92 pairs, and the bundle of sheets is stopped at the position where the bundle of sheets is folded in half. Further, above and below the folding roller 92, saddle stitch matching plates 81 are provided so as to press both side edges of the sheet from the width direction of the sheet each time the stacker 84 of the sheet is carried in to perform the alignment operation.

[Saddle stitching unit]
The saddle stitching portion 80 is provided with an anvil 83 which is provided at a position facing the bundle of sheets, for example, a staple needle is driven by a screwdriver in the saddle stitching unit 82, and the leg portion of the staple needle is bent. Since the saddle stitching unit 82 is already widely known, the description thereof will be omitted here. However, as the binding means, not only the staples are pierced through the sheet bundle and bound, but also an adhesive is applied to the center of the sheet in the transport direction. The mechanism may be such that the sheets are applied and the sheets are bonded together to form a bundle.

[Around the 2nd loading tray 26]
The sheet bundle bound by the saddle stitching unit 82 is folded in half by the folding roller 92 and the folding blade 94 that pushes the sheet bundle into the folding roller 92 and the bundle discharging roller 96 located on the downstream side thereof. Is discharged to the second loading tray 26. The second loading tray 26 is provided with a rotatable roller 102 at the tip for dropping a bundle of folded sheets that is folded and discharged with its back side as the tip side onto the second loading tray 26. A presser lever 104 is attached to hold the accumulated folded sheet bundle from above so that the bundle of folded sheets does not spread. The presser roller 102 and the presser lever 104 open the folded sheet bundle to reduce the decrease in collectability.

[Details of branch position 36, end face binding portion 60]
Here, the branch position 36 and the end face binding portion 60 will be further described with reference to FIG. As described above, here, a transport path 42 extending linearly from the carry-in inlet 30 to the carry-in path 32 in which the carry-in roller 34 is arranged in the direction of the processing tray 54, and an escape path 38 extending upward in the drawing from the carry-in path 42 and below. A branch path 70 is shown which is curved to guide the seat to the stacker 84. At the branch position 36, there is a change flapper 78 that selectively positions and guides the sheet of the carry-in route 32 to the escape route 38 or the transport route 42 route, or the sheet that is switched back to the transport route 42 to the branch route 70. Have been placed.

In this embodiment, for example, as shown in FIG. 3, the escape route 38 is blocked at the solid line position to guide the sheet from the carry-in route 32 to the carry-in route 42, and the carry-in route is guided at the broken line position. It is shown that the sheet conveyed from 32 is guided to the escape path 38, and the sheet conveyed by switching back the transfer path 42 is guided to the branch path 70.

In the above-mentioned transport path 42, a transport roller 44 that reverses forward and is in contact with each other is arranged immediately before the transport path outlet 46, which is the final end. That is, the transport roller 44 can transport the sheet to the processing tray 54 side by one-way rotation in the pressure contact state, and switchback transport in the opposite direction by the other rotation.

[Switchback transport]
This switchback transfer is performed by rotating the transfer roller 44 on the other side after detecting the passage of the rear end of the sheet, which is arranged immediately after the switching gate 37 of the transfer path 42. On the other hand, during rotation, the switching gate 37 is moved to a position that blocks the carry-in path 32 (the position indicated by the broken line in FIG. 3), whereby the sheet is conveyed to the branch path 70 and is taken over and conveyed by the branch roller 72. When the rear end reaches a predetermined position, the branch roller 72 is stopped, and the seat is put into a standby state on the branch path 70.

By the way, the outlet 50 (the outlet located between the processing tray 54 and the first loading tray 24 and downstream of the processing tray 54 in the transport direction), which is on the downstream side of the transport roller 44 in the transport direction, is forward-reversed and mutually reversed. An outlet roller 48 that is separated from and detached from is arranged. The outlet roller 48 is composed of an outlet upper roller 48a and an outlet lower roller 48b, which rotate in one direction in a pressure contact state with each other, and cooperates with the above-mentioned transport roller 44 to put a sheet on the first loading tray 24. The sheet is conveyed to the branch path 70 by rotation on the other hand. The outlet roller 48 is also used when the sheets accumulated in the processing tray 54 and bundled are discharged to the first loading tray 24 in cooperation with the movement of the reference surface 57 described later.

[Aggregation in processing tray 54]
Here, the accumulation of sheets in the processing tray 54 will be described. In the accumulation on the processing tray 54, the sheet discharged from the transfer roller 44 is conveyed to the right side of FIG. 3 by the other rotation of the outlet roller 48 located on the downstream side. The conveyed sheet is transferred by rotating the scraping roller 56 around which the protruding belt 146 is wound in the counterclockwise direction shown in the drawing. By this transfer, the tip of the sheet in the transport direction comes into contact with the reference surface 57, which is the binding reference of the other surface, and stops. At this time, the scraping roller 56 slides on the seat and prevents the tip of the seat from buckling after coming into contact with the reference surface. The inclined surface of the processing tray 54 functions as a support portion for receiving and supporting a plurality of sheets to form a sheet bundle.

[Movement and binding process of end face binding unit 62]
When the sheet is discharged from the transport roller 44, the sheet is fed to the reference surface 57 by the rotation of the outlet roller 48 and the drawing roller, and is stacked on the processing tray 54. Further, in accordance with this stacking operation, the matching plates 58 are brought into contact with each other from both sides in the sheet width direction to align the sheets with the center of the processing tray 54 in the width direction.

This stacking and matching is repeated until the specified number of bundles is reached. When the specified number of sheets is reached, the end face binding unit 62, which moves the end face of the sheet in the sheet width direction on the moving table 63, is moved to a desired binding position. This movement is guided by fitting the moving pin 62b of the end face binding unit 62 to the groove rail (shown) provided on the moving table 63 in the seat width direction.

Since the binding process of the end face binding unit 62 is already known, the description thereof will be omitted. However, when the end face binding unit 62 stops at the designated binding position, the end face binding motor 62M is rotationally driven to move a driver (not shown) to staple. The needles are driven into a bundle of sheets, and the staples that have been driven are bent by anvil and bound. This binding process is performed at a plurality of positions on the corner end faces of the sheet and the end faces in the width direction.

[Discharge of end face binding sheet]
The sheet bundle bound by the end face binding unit 62 is moved in the counterclockwise direction shown in the reference plane moving belt 64 bridged to the right pulley 65 and the left pulley 66 under the processing tray 54, and the reference plane moving belt 64 is moved. By moving the reference surface 57 connected to the sheet bundle to the left in the drawing, the binding end surface side of the sheet bundle is pushed out toward the first loading tray 24. Along with this extrusion, the sheet bundle bound by the outlet roller 48 arranged at the outlet of the processing tray 54 is pressed from the front and back, and the sheet bundle bound to the first loading tray 24 is discharged by rotating clockwise.

[Up and down of the first loading tray 24]
The first loading tray 24 for accumulating the sheet bundles will be described. As shown in FIG. 3, the first loading tray 24 is arranged at substantially the same inclination angle as the processing tray 54, and the binding sheet bundle discharged from the processing tray 54, the transfer roller 44 from the transfer path 42, and the outlet roller 48. Each sheet discharged by is also accumulated. On the bottom surface side of the first loading tray 24, an elevating motor 24M for driving an elevating rack 107, which is a second moving means for elevating and lowering the first loading tray 24, is provided, and this drive is transmitted to the elevating pinion 109. The elevating pinion 109 is engaged with an elevating rack 107 that is vertically fixed to the inside of the standing surface 28 of the device frame 20. Further, although not particularly shown, the elevating rail provided on the standing surface 28 of the first loading tray 24 guides the upper and lower parts. A second control means (not shown) for controlling the elevating motor 24M for driving the second moving means for elevating and lowering the first loading tray 24 in the vertical direction is provided.

The position of the first loading tray 24 or the position of the sheets accumulated in the first loading tray 24 is detected by the paper surface sensor 24S provided on the standing surface side. Then, when the paper surface sensor 24S detects it, the elevating motor 24M is driven to rotate the elevating pinion 109 to descend. In the state of FIG. 3, the upper surface of the first loading tray 24 is detected by the paper surface sensor 24S, and the sheet bundle is received by slightly descending from here. Therefore, the upper surface of the outlet position from the processing tray 54 and the upper surface of the first loading tray 24 are located with a step.

Next, the configuration of the rotary drive and the detachment of the transfer roller 44 and the outlet roller 48 will be described with reference to FIG.
[Rotary drive of transport roller 44a]
First, the transport roller 44 including the transport upper roller 44a and the transport lower roller 44b is driven by the transport roller motor 44M. The transfer roller motor 44M is composed of a hybrid type stepping motor, and a speed detection sensor 44S for detecting the rotation speed of the motor shaft is arranged. The drive of the transfer roller motor 44M is transmitted to the arm gear 126 via the transmission gears 120 and 122 and the transmission belt 124. The drive from the arm gear 126 is transmitted by the transmission belt 128 to the upper roller shaft 44uji of the transfer upper roller 44a supported by the transfer roller support arm 136.

[Detachment of transport roller 44a]
Further, the transport upper roller 44a is attached so as to be rotated around the axis of the arm gear 126 in order to be separated from the fixed transport lower roller 44b, and this roller pair is the first transport means. This disengagement is performed by a transport roller moving arm 130 having a rear fan-shaped gear attached to the shaft of the arm gear 126 and having a spring 134 attached to the tip of the moving arm on the tip side to urge the transport upper roller 44a.

That is, by driving the transport roller moving arm motor 130M engaged with the rear fan-shaped gear in the forward and reverse directions, the arrow O is pressed in the release direction of the arrow O by one-way rotation, and the arrow C is pressed against the transport lower roller 44b by the other rotation. It moves in the pressure welding direction of C. The transfer roller moving arm motor 130M is also composed of a stepping motor, and the position of the transfer roller moving arm 130 is detected by the transfer roller moving arm sensor 130S.

[Rotary drive of transport lower roller 44b, etc.]
The rotational drive of the transport lower roller 44b is performed by transmitting the drive of the transport roller motor 44M to the receiving gear 142 individually provided on the transport lower roller shaft 44sj via the transmission gear 120 and the transmission belt 138. Further, the drive from the receiving gear 142 draws in a gear 144 with a one-way clutch and a belt with a protrusion 146 that also serves as a transmission belt to rotate the roller 56. Since the scraping roller 56 is transmitted via the gear 144 with a one-way clutch, even if the receiving gear 142 rotates forward and reverse as described above, it rotates only in the direction of the solid line arrow in FIG. 4, and the processing tray Transfer only in the direction of the reference plane 57 of 54. Further, the drive of the transfer roller motor 44M is also transmitted to the branch lower roller shaft 72sj of the branch lower roller 72b of the branch roller 72 that conveys the sheet in the branch path 70 via the transmission gear 120 and the transmission belt 148.

[Speed setting of transfer roller motor 44M]
With the above configuration, according to the forward and reverse rotation of the transfer roller motor 44M, the transfer roller 44 and the branch roller 72 are in one direction in the direction of the solid line arrow and the other direction in the direction of the broken line arrow (switchback direction), and the drawing roller is in the direction of the solid line arrow. Rotates in the direction of the reference plane 57. Further, the transfer roller motor 44M is about 1100 mm / s when the sheet is conveyed to the processing tray 54 side, and is about 1100 mm / s or about 600 mm at a lower speed when the switchback is conveyed to the branch path 70 side. It can be arbitrarily set so that the sheet can be conveyed at a speed of / s.

This speed is the rotation set speed from the start, and the average speed is lower than this set value, but in any case, the sheet is transported in the transport direction, the sheet length, or the transport mode of standby transport or second tray transport. The speed is variable. This speed setting will be described later.

[Rotary drive of roller 48a on exit]
The outlet roller 48 including the outlet upper roller 48a and the outlet lower roller 48b is driven by the outlet roller motor 48M. The outlet roller motor 48M is also composed of a hybrid type stepping motor, and a speed detection sensor 48S for detecting the rotation speed of the motor shaft is also arranged in the same manner. The drive of the outlet roller motor 48M is transmitted to the outlet arm gear 156 via the transmission gears 150 and 152 and the transmission belt 1 processing tray 54. The drive from the outlet arm gear 156 is transmitted by the transmission belt 158 to the outlet upper roller shaft of the outlet upper roller 48a supported by the outlet roller support arm 166.

[Detachment of roller 48a on the exit, etc.]
The outlet upper roller 48a is attached so as to be rotated around the axis of the outlet arm gear 156 in order to separate and contact the fixed outlet lower roller 48b. This roller pair is the second conveying means. This disengagement is performed by the outlet roller moving arm 160 having a rear fan-shaped gear attached to the shaft of the outlet arm gear 156 and having a spring 164 attached to the tip of the moving arm on the tip side to urge the upper roller 48a. .. The outlet roller moving arm 160 is a first moving means for moving the roller pair to a transporting position for transporting the sheet and a separated position away from the sheet.

By driving the outlet roller moving arm motor 160M that engages with the rear fan-shaped gear in the forward and reverse directions, the arrow C is in contact with the release direction of the arrow O by one-way rotation and by the other rotation of the arrow C against the outlet lower roller 48b of the arrow C. Move in the pressure welding direction. The outlet roller moving arm motor 160M is also composed of a stepping motor, and the position of the exit roller moving arm 160 is detected by the outlet roller moving arm sensor 160S.

Further, the rotational drive of the outlet lower roller 48b is performed by transmitting the drive of the outlet roller motor 48M to the receiving gear 169 individually provided on the outlet lower roller shaft 48sj via the transmission gear 150 and the transmission belt 168. Then, the outlet roller moving arm motor 160M is controlled by the first control means (not shown) to drive the exit roller moving arm 160.

[Speed setting of outlet roller motor 48M]
With the above configuration, according to the forward and reverse rotation of the outlet roller motor 48M, the outlet roller 48 is referenced on the processing tray 54 after the sheet is discharged from the transport roller 44 in one direction in the direction of the solid line arrow and the other direction in the direction of the broken arrow arrow. (Switchback direction to surface 57). Further, the outlet roller motor 48M is about 1100 mm / s for takeover transfer from the transfer roller 44, and about 600 mm / s for switchback transfer in the direction of the transfer reference surface, based on the sheet bundle of the processing tray 54. When discharging to the first loading tray 24 in cooperation with the movement of the surface 57, it is possible to set so that the sheet can be conveyed at a speed of about 300 mm / s.

That is, the outlet roller motor 48M can set the speed in the range of about 1100 mm / s to about 300 mm / s. In this embodiment, when the sheet is transported by the transport roller 44, such as during switchback transport in the case of standby transport, the drive motors are separated and interlocking is difficult. Therefore, the roller 48a on the outlet is an outlet. It is located at a separated position released from the lower roller 48b.

[Paper sensor 24S of the first loading tray 24]
The mechanism for raising and lowering the first loading tray 24 has already been described with reference to FIG. 3, but the setting of the raising and lowering position will be described with reference to FIG. The elevating position is set by detecting the paper surface of the paper surface sensor 24S or the upper surface of the first loading tray 24, and this paper surface sensor 24S is performed by detecting the sensor flag 24f whose one end is rotatably supported. .. Further, an empty sensor 25 for detecting whether or not a sheet is placed is provided on the mounting surface of the first loading tray 24. Therefore, when the empty sensor 25 is ON, the paper surface sensor 24S detects the upper surface of the sheet, and when it is OFF, it detects the height of the mounting surface on which the sheet is not mounted. It will be.

The mounting surface of 24 of the first loading tray supports the sheet received by the processing tray 54 and the sheet bundle formed by the processing tray 54 together with the processing tray 54, and the sheet bundle conveyed from the processing tray 54 by the outlet roller 48. It functions as a loading unit for loading.

[Setting the elevating position of the first loading tray 24]
By the way, the elevating position of the first loading tray 24 is set so that the mounting surface or the paper surface is positioned at the sheet receiving position at the distance of L1 + L2 shown in FIG. 5 when the sheet bundle is discharged from the processing tray 54. is there. When the sheets are ejected one by one, the mounting surface or the paper surface is set to be positioned at the guide position 24Sh of the L1 distance that shortens the falling range of the sheets.

Further, when the sheet to be switchback-conveyed by the transfer roller 44 is short, or when the switchback transfer is to make the sheet stand by in the branch path 70 for end face binding, the tip of the sheet to be switched back is placed on the first loading tray 24. The lowering position is set to 24SL at a distance of L1 + L2 + L3 so as not to touch the seat or the mounting table on which it is placed.

Further, when the sheet to be transferred by the transfer roller 44 for switchback is long, or when the sheet is to be transferred to the branch path due to saddle stitching, bending or fluttering of the tip of the sheet to be transferred by switchback should be suppressed. The ascending setting is also made so that the mounting surface or the paper surface is located at the guide position 24Sh of the L1 distance that shortens the step range in order to guide the sheet.

Here, the standby transport that switches back and waits in the branch path 70 for the above-mentioned end face binding will be described. When the end face binding unit 62 performs the binding process on the processing tray 54, the end face binding process of the preceding sheet bundle is not completed because the image-formed sheet of the image forming apparatus A is carried in at a high speed and the sheet spacing is short. However, it is necessary to prevent the next sheet from being carried in.

Therefore, the first or second sheet transported to the transport path 42 via the carry-in route 32 is once switchback-transported on the transport path 42, and the switchback-conveyed sheet is retained in the branch path 70. Is being made to stand by. Then, the sheets waiting in the branch path 70 are fed out so as to be superposed on the next second or third sheet, and the interval time between the sheet bundles is secured.

In the present invention, it is "waiting" to switch back transport from the transport path 42 to the branch path 70, hold one or more sheets in the branch path 70 to stand by, and feed and transport the next sheet together with the waiting sheet. Defined as "transportation".

Most of the sheets for end face binding that perform this standby transfer are sheets having a relatively short length in the transfer direction, for example, A4, B5, and letter size sheets. Therefore, since these sheets are on standby, the switchback transfer is performed without significantly protruding to the downstream side of the processing tray 54, and the sheets are less likely to bend during this transfer. Even if it bends a little, the distance to the processing tray 54 is relatively short, so that the bending is easily corrected by the matching operation of the matching plate 58.

The completion of the end face binding process not only completes the discharge operation of the sheet bundle from the processing tray 54 to the first loading tray 24, but also the initial setting operation of the matching plate 58 on the processing tray 54 and the reference surface moving belt. This includes initializing each mechanism to accept the 64 initial position return or other next sheet.

[Stiffening means]
As shown in FIG. 6, a firming means 300 for firming the seat is provided between the outlet roller 48 and the first loading tray 24, and the outlet upper roller 48a and the outlet roller 48b nip the seat. In the state of being conveyed, the sheet is discharged by forming a curved portion by the firming means 300. The firming means 300 forms a wave-shaped curve on the sheet along a direction orthogonal to the transport direction, so that the sheet is firmed in the transport direction.

That is, a certain amount of drag is applied to the sheet against bending in the width direction. The firming means 300 may be a mechanism for simply performing the firming, but it may also be a firming means having a function of guiding the seat when the seat is protruding outside the machine.

The operation described above will be described in detail below with reference to the sheet flow charts of FIGS. 7 to 9.
[Standby transport for end face binding]
First, in order to collect in the processing tray 54 according to FIGS. 7 to 9 and bind the end faces to the sheet bundle, the transport roller 44 is reversed and waits in the branch path 70, and then the standby transport is transported to the processing tray 54 side again. explain. In FIGS. 7 to 9, the case of A4 horizontal, which is relatively often used for end face binding, is taken as an example, and SL indicates the distance from the seat sensor 42S of the transport path 42 to the outlet position (outlet 50) of the outlet roller 48. .. In this embodiment, the SL is 120 mm to 130 mm. Therefore, the length of the seat is a little less than twice that of the SL, and as shown in FIG.

First, in FIG. 7A, when the first sheet (seat1) for end face binding is conveyed on the transfer path at about 1100 mm / s and the rear end of the sheet is detected by the sheet sensor 42S, the transfer roller 44 is temporarily stopped, and this time, the transfer roller motor 44M is switched to reverse so as to reverse the seat. At this time, about half of the tip side of the sheet protrudes as described above.

Next, as shown in FIG. 7B, the switching gate 37 is moved to the solid line position shown in the drawing prior to the reversal of the transfer roller motor 44M. The sheet is conveyed to the branch path 70 side by the transfer roller 44, and is conveyed toward the downstream side of the branch path 70 by the branch roller 72 rotated by the transfer roller motor 44M. The transport speed of the transport roller motor 44M at this time is also set to a high speed so as to transport the sheet at 1100 mm / s. Of course, since the transfer roller motor 44M temporarily stops at the time of normal rotation to reverse rotation, this 1100 mm / s is set as the transfer target speed, and the average speed is a little slower, but the sheet is carried in from the image forming apparatus image. It is transported at high speed in time.

In FIG. 8A, the transfer roller motor 44M is stopped when the rear end of the sheet (sheet1) to which the switchback has been conveyed reaches a position at the branch position 36 that does not hinder the introduction of the next sheet (sheet2). As a result, the branch roller 72 also stops, and the previous sheet waits for the next sheet to be brought in on the branch path 70. The next sheet (sheet2) is conveyed from the carry-in path 32 toward the transfer path 42 at 1100 mm / s by the carry-in roller motor 34M.

Subsequently, in FIG. 8B, the switching gate 37 is moved to a position blocking the escape path prior to reaching the transport path 42 of the next sheet. As a result, the next sheet (sheet2) is transported to the transport path 42. At the same time, the sheet (sheet1) that has been waiting in the branch path 70 is overlapped and transported so that it can be transported. At this time, the previous sheet (sheet1) is conveyed by slightly shifting to the rear side with respect to the tip of the next sheet (sheet2). As shown below, when the top sheet (the sheet close to the scraping roller 56) is located far from the reference surface 57 when it is carried into the processing tray 54, the rotation of the scraping roller 56 allows a plurality of sheets to be accurately referenced. It will be aligned on the surface 57. When these two sheets are overlapped with each other, both the carry-in roller motor 34M and the transfer roller motor 44M are set so that the sheets are conveyed at the same speed with 1100 mm / s as the transfer arrival speed.

Next, proceeding to the state of FIG. 9A, the upper roller 48a of the outlet roller 48 descends toward the outlet roller 48b to lift the sheet before the two overlapping sheets are discharged from the transport roller 44. Nip. At this time, the outlet roller 48 is conveyed at the same speed as the transfer roller 44, and when the sheet is released from the transfer roller 44, the sheet is temporarily stopped. After this stop, the outlet roller 48 is rotationally driven toward the reference surface 57 side of the processing tray 54. As a result, the two sheets (sheets 1 and 2) are conveyed to the reference surface 57 side on the mounting surface of the processing tray 54, and are subsequently driven by the transfer roller motor 44M via the gear 144 with a one-way clutch. Will continue to be transported by. It should be noted that the transfer of the outlet roller 48 to the reference surface 57 side is easy to match if the rotation is reduced from 1100 mm / s to about 600 mm / s.

FIG. 9B shows a state in which the third sheet (sheet3) is carried into the processing tray 54. In this case as well, before the third sheet is discharged from the transport roller 44, the roller 48a on the outlet is lowered and rotated in the same direction as the transport roller 44, and after the sheet is discharged, the rotation direction is reversed this time. Then, it is transferred to the reference surface 57 side together with the scraping roller 56. This is repeated until the number reaches a specified number, and the bundle is generated as one bundle. After the binding process is performed by the end face binding unit 62, the first loading tray 24 bundles and discharges the paper. As described above, in the standby transfer for end face binding of FIGS. 7 to 9, the switchback transfer speed of the transfer roller 44 is set to 1100 mm / s for high-speed transfer. Further, the first loading tray 24 is located at the normal seat receiving position 24Sm without particularly moving up and down as shown in FIGS. 7 to 9.

In the above series of operations, when the sheet carried into the processing tray 54 is supported across the processing tray 54 and the first loading tray 24, the stiffness added by the firming means may be released. .. Explaining this with reference to FIG. 10, in FIG. 10A, when a sheet is carried into the processing tray 54, the outlet roller 48 is separated for receiving the next sheet and aligning with the matching plate 58. Therefore, as shown in FIG. 10B, the seat of the portion protruding from the machine, which has been stiffened by the stiffening means 300, loses the support by the outlet roller 48 and hangs down, and the stiffening is released.

FIG. 11 shows an operation for re-giving the stiffness after that. In FIG. 11A, the first loading tray 24 drives an elevating motor 24M that raises and lowers the first loading tray 24 before the sheets are discharged from the processing tray 54 to the first loading tray 24. The position of the upper surface (mounting surface) of the first loading tray 24 or the upper surface of the already loaded paper is set to be equal to or higher than the extension line of the upper surface (inclined surface) of the processing tray 54 in order to re-give the sheet to which the stiffness has been released. The second moving means is controlled by the second controlling means so as to be driven ascending to the height position.

Further, as shown in FIG. 11B, the elevating motor 24M that raises and lowers the first loading tray 24 so that the upper surface of the first loading tray 24 or the upper surface of the already loaded paper is higher than the upper surface of the processing tray 54. Before the ascending drive, the outlet roller 48 may be re-niped and then ascended.

FIG. 12 shows the subsequent discharge operation. After driving the elevating motor 24M that raises and lowers the first loading tray 24 to move the upper surface of the first loading tray 24 or the upper surface of the already loaded paper to a height higher than the upper surface of the processing tray 54, the first loading tray 24 is moved. It is driven downward to the normal seat receiving position 24Sm, and the seat inside is discharged to the first loading tray 24.

Here, the upper surface of the first loading tray 24 or the upper surface of the already loaded paper is made higher than the upper surface of the processing tray 54 by the elevating motor 24M that raises and lowers the first loading tray 24 before discharging to the first loading tray 24. A specific example of the criteria for determining whether or not to drive the vehicle ascending is shown below. That is,
(1) Judgment as to whether the sheet is special paper. In this case, the control unit (not shown) of the sheet loading device B includes special paper recognition means for recognizing whether or not the sheet is special paper from the sheet information sent from the image forming device A.
(2) Judgment as to whether or not the sheet has a predetermined basis weight or less. In this case, the control unit of the sheet loading device B includes a basis weight recognizing means for recognizing whether or not the sheet is thin paper having a predetermined basis weight or less from the sheet information sent from the image forming apparatus A.
(3) Judgment as to whether or not the length of the sheet in the transport direction is equal to or longer than a predetermined length. In this case, the control unit includes a length recognizing means for recognizing whether or not the sheet is a large paper having a predetermined length or more from the sheet information sent from the image forming apparatus A.
(4) Judgment as to whether or not the number of sheets conveyed to the processing tray 54 is less than or equal to a predetermined number. In this case, the control unit includes a number recognizing means for recognizing whether or not the number of sheets introduced into the sheet information sent from the image forming apparatus A is equal to or less than a predetermined number of sheets.

FIG. 13 is a flowchart showing a process of transporting the sheet to the first loading tray 24 after loading the sheet on the processing tray 54, and whether or not the sheet is a sheet that needs to be re-fed after the start of JOB. Judgment is made in light of the above criteria. In the flowchart, it is shown that the determination of "special paper?" Is typically performed. Then, when it is determined (“NO”) that the sheet does not require re-giving of stiffness in this determination, a series of processes described with reference to FIGS. 7 to 9 is performed, and the JOB ends. The “paper ejection ROL” shown in the flowchart refers to the outlet roller 48 (second transport means).

On the other hand, when it is determined (“YES”) that the sheet requires re-adding of stiffness, the processing of step Sa and step Sb is additionally performed. In step Sa, as described with reference to FIG. 11, the surface of the loading tray 24 (upper surface of the paper surface) is moved to a position higher than the upper surface of the processing tray 54. Then, in step Sb, as described with reference to FIG. 12, the surface of the loading tray 24 is returned to the normal receiving position.

Further, when it is determined that it is necessary to re-add the stiffness, the height position when moving the surface of the loading tray 24 (upper surface of the paper surface) to a position higher than the upper surface of the processing tray 54 in step Sa is changed depending on the conditions of the sheet. Good. The flowchart of FIG. 14 shows the flow of determining the height position.

First, when it is determined that it is necessary to re-give the stiffness (“YES” in the “special paper?” Judgment), then it is determined whether or not the sheet has a predetermined basis weight or less. Then, when it is determined that the basis weight recognizing means is "less than or equal to the predetermined basis weight" ("YES"), the first loading tray 24 is higher than the normal receiving position Sm, and the upper surface (inclined surface) of the processing tray 54 is set. Move to the height position H2 above the extension line. Further, when it is determined that the basis weight recognition means is "not less than or equal to the predetermined basis weight (exceeds the predetermined basis weight)" ("NO"), the first loading tray 24 is higher than the normal receiving position Sm and lower than the position H2. Move to position H1.

The height position where the first loading tray 24 moves has been described above in the case of basis weight, but when determining whether or not the sheet has a predetermined length or more, the length recognizing means has a predetermined length or more. When the sheet is recognized as, the first loading tray 24 is moved to H2, and when the length recognizing means recognizes that the length is less than a predetermined length, the first loading tray 24 is moved to H1.

Similarly, when determining whether or not the number of sheets constituting the sheet bundle formed by the processing tray 54 is the predetermined number or less, when the number recognizing means recognizes that the number of sheets is the predetermined number or less. , The first loading tray 24 is moved to H2, and when the number recognition means recognizes that the number of sheets exceeds a predetermined number, the first loading tray 24 is moved to H1.

Further, in order to prevent the sheet from being loosened, the shape of the seat mounting surface of the first loading tray 24 is changed to a shape that further promotes the curved portion formed on the sheet by the firming means 300, as shown in FIG. It is good to set it to.

Furthermore, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the present invention, and all of the technical matters included in the technical idea described in the claims are the present invention. It is the subject of the invention. Although the embodiments so far have shown suitable examples, those skilled in the art can realize various alternative examples, modified examples, modified examples, or improved examples from the contents disclosed in the present specification. These are included in the technical scope set forth in the appended claims.

A Image forming device B Sheet loading device 24 1st loading tray (loading means)
42 Transport path 44 Transport roller (first transport means)
48 Outlet roller (second transport means)
54 Processing tray 107 Lifting rack (second moving means)
160 Exit roller moving arm (first moving means)
300 Stiffening means

Claims (9)

A transport route that accepts and guides the sheet,
A first transport means for transporting a sheet in a predetermined transport direction along the transport path, and
A processing tray located on the downstream side of the first transport means in the transport direction and provided with a support portion that receives and supports a plurality of sheets transported by the first transport means to form a sheet bundle.
A second transport means located downstream of the processing tray in the transport direction and transporting the sheet bundle formed by the processing tray from the processing tray in the transport direction.
Located on the downstream side of the processing tray and the second transporting means in the transporting direction, the sheet received by the processing tray and the sheet bundle formed by the processing tray are supported together with the processing tray, and the second transporting means. A loading means provided with a loading portion for loading the bundle of sheets conveyed from the processing tray by
A first moving means for moving the second transporting means to a transporting position in contact with the sheet bundle and a separated position away from the sheet bundle for transporting the sheet bundle.
With the first moving means moving the second transporting means to the transporting position, the firming means for firming the sheet bundle and the firming means.
A second moving means for moving the loading means in the vertical direction,
When the processing tray receives the sheet conveyed by the first conveying means, the second conveying means is moved to the separated position, and the loading means of the loading means before the second conveying means conveys the bundle of sheets. A control means for controlling the first moving means and the second moving means in order to carry out a moving process for moving the loading portion in a vertical direction to a position higher than an extension line of the supporting portion of the processing tray.
Seat loading device equipped with. Further provided with a basis weight recognizing means for recognizing the basis weight of the sheet transported by the first transport means.
When the basis weight recognizing means recognizes that the basis weight of the sheet is equal to or less than a predetermined value, the control means controls the first moving means and the second moving means in order to carry out the moving process. Item 1. The sheet loading device according to item 1. Further provided with a length recognizing means for recognizing the length of the sheet to be conveyed by the first conveying means in the conveying direction.
When the length recognizing means recognizes that the length of the sheet is equal to or greater than a predetermined value, the controlling means controls the first moving means and the second moving means in order to carry out the moving process. Item 1. The sheet loading device according to item 1. Further provided with a number recognition means for recognizing the number of sheets constituting the bundle of sheets formed by the processing tray.
When the number of sheets recognizing the number of sheets is recognized by the sheet number recognizing means that the number of sheets constituting the bundle of sheets is equal to or less than a predetermined value, the control means has the first moving means and the second moving means in order to carry out the moving process. The sheet loading device according to claim 1. When the basis weight recognizing means recognizes that the basis weight of the sheet exceeds the predetermined value, the control means measures the loading portion of the loading means when the second conveying means conveys the sheet bundle. A claim for controlling the second moving means so as to move the loading portion of the loading means to a height position vertically above the predetermined position and less than an extension line of the support portion of the processing tray in the vertical direction. Item 2. The sheet loading device according to item 2. When the length recognizing means recognizes that the length of the sheet is less than a predetermined value, the control means measures the predetermined position of the loading portion of the loading means when the second conveying means conveys the bundle of sheets. 3. Claim 3 for controlling the second moving means so as to move the loading portion of the loading means to a height position above the vertical direction and less than an extension line of the support portion of the processing tray in the vertical direction. The sheet loading device described in. When the number of sheets constituting the bundle of sheets is recognized by the number recognition means as exceeding a predetermined value, the control means controls the loading of the loading means when the second transport means conveys the bundle of sheets. The second moving means is controlled so as to move the loading portion of the loading means to a height position vertically above the predetermined position of the portion and below the extension line of the support portion of the processing tray in the vertical direction. The sheet loading device according to claim 4. The control means moves the second transport means to the transport position before the second transport means transports the sheet bundle, and then supports the loading portion of the loading means in the vertical direction of the processing tray. The invention according to any one of claims 1 to 7, wherein the first moving means and the second moving means are controlled so as to move from a height position less than the extension line of the portion to a height position higher than the extension line in the vertical direction. Sheet loading device. The control means vertically moves the loading portion of the loading means in the vertical direction from a height position equal to or higher than an extension line of the support portion of the processing tray before the second transport means conveys the sheet bundle. The sheet loading device according to any one of claims 1 to 8, which controls the first moving means and the second moving means so as to move to a height position less than the extension line.

Images