JP3441897B2 - Paper post-processing equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is installed on the rear side (discharge section) of an image forming apparatus such as a copying machine or a printer, and is discharged from the image forming apparatus. A stapling mode in which copy sheets are stapled in a state where they are aligned and bundled on a staple tray, and further, the stapled mode in which the stapled sheet bundle is discharged to a paper discharge tray, and discharged from the image forming apparatus The present invention relates to a sheet post-processing apparatus having a non-staple mode for directly discharging a copy sheet to a sheet discharge tray. 2. Description of the Related Art As described above, a copy sheet ejected from an image forming apparatus, which is installed at a later stage (paper ejection section side) of an image forming apparatus such as a copying machine or a printer, is placed on a staple tray. A stapling mode in which the sheets are bound and stapled, and the stapled sheet bundle is further discharged to a discharge tray, and a copy sheet discharged from the image forming apparatus is directly discharged to a discharge tray. A sheet post-processing apparatus having a non-staple mode for discharging is widely known. Such a sheet post-processing apparatus has a sheet bundle binding processing apparatus (staple unit). In general, the staple unit includes a staple tray for receiving copy paper carried in from the image forming apparatus, a jogger fence for aligning copy paper carried in the staple tray, and paper aligned on the staple tray. It has a stapler for stapling bundles. For example, a paper post-processing apparatus disclosed in JP-A-2-276691 has
In the staple mode, copy paper conveyed along the staple conveyance path is accommodated in a staple tray by a brush roller to perform a binding process, and the bound sheet bundle is discharged to a discharge tray. ing. In the non-staple mode, the copy sheet is discharged directly to the discharge tray through the non-staple transport path. In the above-described conventional paper post-processing apparatus having a non-staple transport path and a staple transport path, the branching claw that switches between the two paths only functions to switch the path. As a discharge roller for feeding copy paper to a staple tray provided at a downstream end of the staple conveyance path, a brush roller having an outer peripheral surface formed in a brush shape is provided. Since this brush roller is expensive, there is a problem that the entire machine becomes expensive. Further, since the copy sheet is pressed against the staple tray by the brush roller, the copy sheet may be stained, which is a quality problem. [0004] challenge of the present invention, one Dan, without copying paper discharged to the staple tray is back to the conveyance roller direction, can be reliably housed in the staple tray, reliable An object of the present invention is to provide a sheet post-processing apparatus. [0005] Means for Solving the Problems The upper Symbol challenges includes Nonsutipuru transport path for transporting the copy paper to the paper discharge tray that is discharged from the discharge portion of the image forming apparatus, a copying paper staple unit stay in the sheet post-processing apparatus having a staple transport path for transporting the Purutorei, the stearate
Transport rollers that transport and discharge copy paper to the paper tray
Near the downstream side and near the staple tray
A branch claw for switching between the non-staple transport path and the staple transport path .
Switch to the tip transport path side
Guide the copy paper discharged to the staple tray
Normally, the branching pawl moves along the non-staple transport path.
Is located in the opening direction, stipple mode is selected,
At the same time as the copy paper is carried in from the forming device,
Rotate in the direction of the
Path and copy paper is discharged to the staple tray.
Is returned to the non-stipple conveyance path again,
The operation to close the staple transport path is performed for multiple copies.
The problem is solved by a first means that repeats for each sheet of paper . Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall configuration diagram of a paper post-processing apparatus according to an embodiment of the present invention, FIG. 2 is a configuration diagram of a swipe tray portion thereof, FIG. 3 is an enlarged configuration diagram near a paper inlet portion of a staple tray, and FIG. FIG. 5 is a transparent perspective view of the entire pull unit from the front side, and FIG. 5 is a transparent perspective view of the entire staple unit from the back side. In FIG. 1, a sheet post-processing apparatus denoted by reference numeral 100 includes a sheet transport system (sheet bundle discharge device) denoted by reference numeral 200, a discharge tray denoted by reference numeral 300, and a stipple unit (sheet binding) denoted by reference number 400. Processing device). Hereinafter, a specific configuration will be described together with its operation and operation. A copy sheet carried into the sheet post-processing apparatus 100 from a sheet discharge unit of the image forming apparatus (not shown) is conveyed between the upper and lower relay guide plates 202 and 201,
The sheet is conveyed between the conveyance guide plate 206 and the entrance guide plate 205 by the conveyance roller 203. When the non-staple mode is selected, the branch pawl 208 is normally located at the non-staple transport path direction position 208a, so that the copy sheet is transported between the vertical guide plate 211 and the transport guide plate 206 by the branch pawl 208. Conveying rollers 209 and 2
10. The sheet is discharged onto the sheet discharge tray 300 by the sheet discharge roller 217. When the staple mode is selected, the leading edge of the copy sheet is detected by the entrance sensor 204, and at the same time,
The branch claw 208 at the non-staple transport path direction position 208a rotates to the staple transport path direction position 208b by the operation of the branch claw sonolide (not shown). Accordingly, the copy sheet is discharged onto the staple tray 401 along the side surface of the branch claw 208 by the transport roller 207. The side surface of the branching claw 208 located at the position 208b in the direction of the staple transport path includes a jogger fence 402 on which a copy sheet is provided on a staple tray 401,
The angle is set so that the sheet can smoothly enter the sheet receiving portion of the side fence 408. At the same time as the trailing edge of the copy sheet passes through the transport roller 207, the branch claw solenoid is turned off, and the branch claw 208 located at the staple transport path direction position 208b rotates to the non-staple transport path direction position 208a to close the staple transport path. As a result, the copy paper once discharged onto the staple tray 401 does not return to the conveying roller 207 again, but the rear end of the copy paper falls downward along the guide member 409 by the operation of the beating roller 219, and the end fence Fits on 403.
The branch claw 20 at the position 208b in the staple transport path direction
The rotation of the sheet 8 to the non-staple transport path direction position 208a is performed by detecting the trailing edge of the copy sheet by the entrance sensor 204. When the copy sheet falls on the end fence 403, the side where the jogger fence 402, which has been waiting at a position 10 mm away from the width of the copy sheet in advance, stops at a position 10 mm away from the end face of the copy sheet relative to the jogger fence 402. The paper is moved in the direction of the fence 408, and the copy paper is pressed against the side fence surface and aligned. Above the staple tray 401, there is provided an open / close discharge guide plate 212 having a discharge driven roller 213. The open / close operation can be performed by a drive motor 214, a gear 215, and a cylindrical cam 216. I have. When the staple mode is selected, the open / close discharge guide plate 2
12 operates in the release position. The distance from the end fence 403 to the tip of the staple tray 401 is 300 mm
And the discharge roller 21 from the end fence 403.
7 is 80 mm, when large-sized copy paper (A3 portrait) is discharged to the staple tray 401, the copy paper is discharged with the leading end protruding from the discharge roller 217 and stacked. You. Transport roller 20
Since the distance from 7 to the paper discharge roller 217 is 320 mm, when stacking copy paper longer than this in the transport direction, the leading edge of the copy paper jumps out of the paper discharge roller 217 and then falls and is stacked. When the next copy sheet reaches the entrance sensor 204, the above series of operations is repeated again, and the above operation is sequentially repeated for each of a plurality of copy sheets discharged from the image forming apparatus. When a predetermined number of copy sheets are stacked and aligned on the staple tray 401 and subjected to binding processing by the stapler 400,
The discharge belt 405 is rotated by the driving of the motor 406, and the discharge claw 404 fixed to the discharge belt 405 raises the rear end of the sheet bundle. When the sheet bundle is lifted to the vicinity of the leading end of the staple tray 401, the open / close sheet discharge guide plate 212 is closed, and the sheet bundle is conveyed by the driving of the sheet discharge roller 217 and discharged to the sheet discharge tray 300. The sheet bundle is in the output tray 300
When the sheet is completely ejected, the open / close sheet guide plate 212 operates again to the release position, and the next series of copy sheets is stacked on the staple tray 401. Here, the stipple unit shown in the 400s will be described in more detail. As shown in FIG. 5, the jogger fence 402 and the side fence 408 move along a guide shaft 417 fixed to the staple tray 401 in a direction perpendicular to the sheet discharging direction. The jogger fence 402 can be moved by a drive stepping motor 414 via a timing belt 415, and the side fence 408 is moved by a drive stepping motor 411 and a timing belt 412. 413 and 416 are timing belts 41
It is a pulley that spans 2,415. When the copy sheet is conveyed to the staple unit and the trailing edge of the copy sheet fits in the end fence 403 provided below the staple tray 401, the copy sheet is previously moved from the home position by 10 mm from the side in the width direction of the copy sheet as described above. The jogger fence 402, which has moved to a distant position, also moves to a position 10 mm away from the copy paper side end surface,
It starts moving in the direction of the stopped side fence 408, advances 20 mm, and presses the copy paper side end surface against the reference surface of the side fence 408. Jogger fence 4
02 is retracted and again 10 mm from the copy paper side end face.
When the next copy sheet is discharged and settled in the end fence 403, the above operation is repeated. The above series of operations are repeated for a plurality of copy sheets, and when the sheet bundle is aligned, the side fence 40
The stapler 400 integrated with the fixing member 410 and the fixing member 410 operates to perform a closing process on the inner corner portion of the sheet bundle. When the sheet bundle is closed, the ejection belt 405 rotates, the ejection claw 404 fixed to the ejection belt 405 raises the rear end of the sheet bundle, and the sheet bundle is placed on the staple tray 401 as described above. And is discharged upward to the paper discharge tray 300. In the above-described embodiment, a non-staple transport path for transporting copy paper discharged from the paper discharge unit of the image forming apparatus to the paper discharge tray 300, and a staple tray of the staple unit for transporting copy paper. A sheet post-processing apparatus having a staple transport path for transporting the sheet to a non-staple transport path and a staple transport path.
In addition, since a guide function for discharging copy paper to the staple tray 401 is provided, the branching claw for switching the transport path has a function of a guide member for discharging paper to the staple tray. In the staple mode, the copy paper can be reliably discharged to the staple tray without providing a special guide member,
A highly reliable sheet post-processing device can be provided. In the above embodiment, the branching claw 208 is disposed near the downstream side of the transport roller 207 for transporting and discharging the copy sheet to the staple tray 401, and is switched to the staple transport path side. In this state, since the copy sheet is guided by the side surface, the brush roller used conventionally is not required, so that an inexpensive sheet post-processing apparatus can be provided. In the above embodiment, the branching claw 208 is usually located in the direction in which the non-staple conveying path is opened, the staple mode is selected, and at the same time the copy sheet is carried in from the image forming apparatus. When the copy paper is discharged to the staple tray 401, the staple transport path is opened by rotating in the direction of the staple transport path, and the non-staple transport path is returned again to close the staple transport path. When the staple mode is selected, the copy sheet is discharged to the staple tray 401, and at the same time, the branch claw 208 is switched from the staple transport path to the non-staple transport path to close the staple transport path. The copy sheet once discharged to the staple tray 401 is Without back to 7 direction, can be reliably housed in the staple tray 401, it is possible to provide a highly reliable sheet finisher. [0015] [Effect of the Invention] According to the present invention Symbol placement, Sutipu
Copy paper is ejected to the staple tray when
At the same time, the branch claw is
Switch to the non-staple transport path
Close the stipple tray
The copy paper discharged in
Is securely stored in the staple tray.
To provide a highly reliable paper post-processing device
Can be.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall configuration diagram of a sheet post-processing apparatus according to an embodiment of the present invention. FIG. 2 is a configuration diagram of the staple tray portion. FIG. 3 is an enlarged configuration diagram near a sheet entrance of a staple tray. FIG. 4 is a perspective view of the entire staple unit as seen from the front side. FIG. 5 is a perspective view of the entire staple unit as seen from the back side. DESCRIPTION OF SYMBOLS 201 lower relay guide plate 202 upper relay guide plate 203 transport roller 204 entrance sensor 205 lower entrance guide plate 206 transport guide plate 207 transport roller 208 branching pawls 209, 210 transport roller 211 vertical guide plate 212 opening / closing discharge guide Plate 214 Drive motor 215 Gear 216 Cylindrical cam 217 Discharge roller 219 Beating roller 300 Discharge tray 400 Stipler 401 Stipple tray 402 Jogger fence 408 Side fence

Claims (1)

(1) A non-staple transport path for transporting copy paper discharged from a paper discharge unit of an image forming apparatus to a paper discharge tray, and transporting copy paper to a staple tray of a staple unit. And a paper post-processing device having a staple transport path for transporting and discharging copy paper to the staple tray.
Near the downstream side of the feed roller and near the staple tray.
A branch claw that is disposed beside and switches between the non-staple transport path and the staple transport path, wherein the branch claw is switched to the staple transport path side;
In the staple tray on its side.
Guide paper, and the branch pawl usually opens the non-staple transport path.
Direction, staple mode is selected,
At the same time as copy paper is loaded from the
Rotate in the direction of the pull transport path to
Open and copy paper is discharged to the staple tray
Again in the direction of the non-staple transport path, and
The operation of closing the tip transport path is performed for a plurality of copy papers 1
A sheet post-processing device that repeats for each sheet.