JP4565933B2 - Sheet processing device - Google Patents

Description

  The present invention relates to a sheet processing apparatus capable of performing predetermined processing on a sheet, such as an image forming apparatus such as a copying machine, a printer, and a facsimile, and a sheet post-processing apparatus.

  In general, when a sheet with a hole such as a loose leaf is used as an image forming sheet, the leading edge of the succeeding sheet is caught in the hole of the preceding sheet when discharging, and smooth discharge cannot be performed. Such a situation may occur. For this reason, for example, in Patent Document 1, the position of the leading end corner of the succeeding sheet is shifted from the position of the hole in the preceding sheet by displacing the sheet discharge position in the deployment width direction to avoid the above-described situation. Yes.

JP 2002-12361 A

  However, in the sheet S having a large hole 600 such as a window frame as shown in FIG. 2, it is difficult to prevent the sheet from being caught even with the technique disclosed in Patent Document 1. Therefore, the trailing ends of the sheets are not aligned, and binding failure or the like occurs, and the sheet bundle may be wasted.

  The present invention has been made paying attention to the above-mentioned circumstances, and the object of the present invention is to effectively prevent the catching of all perforated sheets regardless of the size of the holes, thereby reducing the waste of the sheets. An object of the present invention is to provide a sheet processing apparatus that can be eliminated.

  In order to solve the above-described problem, the invention described in claim 1 includes a first conveyance path and a second conveyance path for conveying a sheet, and the first conveyance path and the second conveyance path. Sheet processing comprising: a third conveyance path positioned downstream of the merged path; and a stapler tray positioned downstream of the third conveyance path and temporarily stacking sheets and performing post-processing such as stapling In the apparatus, a perforated sheet is guided to the second conveying path, and a holeless sheet introduced into the apparatus following the perforated sheet is guided to the first conveying path, and the perforated sheet and the holeless Control is performed to guide the sheet to the third conveyance path in a state where the sheet is overlapped.

  Further, in the invention described in claim 2, in the invention described in claim 1, the second sheet is formed so that sheets passing through the first conveyance path are stacked on the upper side in the stapler tray. A conveyance path is arranged.

  Further, in the invention described in claim 3, in the invention described in claim 1 or 2, the sheet is subjected to post-processing in the second transport path in the third transport path. It has a function of temporarily stacking sheets to be introduced into the apparatus between them.

  According to a fourth aspect of the present invention, there is provided the operation panel according to any one of the first to third aspects, further comprising an operation panel capable of specifying whether or not the sheet is perforated. It is characterized by that.

  Further, in the invention described in claim 5, in the invention described in any one of claims 1 to 4, a display prohibiting continuous introduction of perforated sheets into the apparatus. It is characterized by putting out.

  According to the sheet processing apparatus of the present invention, it is possible to effectively prevent the catching of all perforated sheets regardless of the size of the holes, thereby eliminating the waste of the sheets.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 shows a sheet processing apparatus A according to an embodiment of the present invention. The sheet processing apparatus A includes a copying machine main body 1 and a sheet post-processing apparatus 2. The copy sheet discharged from the copying machine main body 1 is carried into the entrance guide plate 201 of the sheet post-processing apparatus 2 and is conveyed into the sheet post-processing apparatus 2 by the conveying rollers 202 and 203.

  When the non-staple mode is selected in the operation unit of the copying machine main body 1, the sheet passes through the branching claws 211 and 221 (normally, the branching claws 211 and 221 lead the sheet to the non-staple conveyance path 220. The sheet is discharged and stacked on the lower stacking tray 301 and the upper stacking tray 321 by the discharge roller 223. At this time, the paper discharge guide plate 231 is in a closed state.

  Each of the lower stacking tray 301 and the upper stacking tray 321 can be moved up and down by an independent drive unit (not shown), and can be moved to the sheet discharge position of the discharge roller 223. The upper and lower stacking trays 301 and 321 are moved according to the selected discharge mode so that the stacking tray from which sheets are discharged can be switched.

  When the interrupt tray discharge mode is selected in the operation unit of the copying machine main body 1, the branching claw 211 rotates and the sheet is transported to the interrupt tray transport path 210, and also to the interrupt tray 214 by the paper discharge roller 213. Discharged and loaded.

  When the staple mode is selected in the operation unit of the copying machine main body 1, the branching claw 221 operates to carry the sheet into the staple conveyance path 240, and the sheet is further stapled by the staple tray discharge roller 242. Discharged into the stack. Sheets discharged to the stapler tray 402 are dropped one by one by the tapping roller 260 and are pressed against the sheet trailing edge reference fence 410 to align the trailing edges. Further, the sheets are aligned in the width direction one by one by the jogger fence 422.

  When the staple mode is selected, when the sheet discharge guide plate 231 is opened via the link 233 by the rotation of the cam 234, and the binding of the trailing edge of the sheet is selected, the end surface is aligned after the final sheet is aligned by the jogger fence 422. The binding stapler 401 performs one or two binding processes at a predetermined position at the rear end of the sheet bundle. The sheet bundle subjected to the binding process is lifted up to the paper discharge roller 223 by a discharge claw (not shown) and stopped, and then the paper discharge guide plate 231 is closed by the rotation of the cam 234 and is in the link 233. The paper discharge roller 223 is pressed by a spring (not shown), and is discharged and stacked on the lower stacking tray 301 and the upper stacking tray 321 by the paper discharge roller 223.

  When saddle stitching is selected when the staple mode is selected, after the final sheet is aligned by the jogger fence 422, two saddle stitches provided with a predetermined interval (120 mm in this embodiment) are provided. The stapler 403 performs two binding processes on the central portion of the sheet bundle. Further, when the position of the needle lifted upward by the discharge claw and bound by the saddle stitch stapler 403 reaches a predetermined position, it stops, and the sheet discharge guide plate 231 in the opened state is closed and the sheet bundle is closed. The drive motor (not shown) of the paper discharge roller 223 is locked by sandwiching the vicinity of the front end, and the paper discharge roller 223 is fixed to fix the front end of the sheet bundle, and the folding plate 466 faces the needle position of the sheet bundle. The sheet is pressed in the direction of the folding rollers 451 and 452 and subjected to folding processing at the center of the sheet by the folding rollers 451 and 452, and then the sheet bundle is discharged onto the stacking tray 301 and stacked. By fixing the leading end portion of the sheet bundle with the paper discharge guide plate 231, the movement of the sheet bundle due to the bending caused by the pressing of the folding plate 466 is constant only from the rear end direction of the unfixed sheet bundle, The folding position is stable. Further, by locking the paper discharge roller 211, the sheet bundle can be reliably fixed by the paper discharge guide plate 231.

  When multiple copies are selected when the staple mode is selected, the sheets of the first and subsequent pages are carried into the prestack conveyance path (second conveyance path) 250 by operating the prestack branch claw 251. Then, the front end of the sheet is temporarily stopped by the prestack roller 252 just before the conveyance roller 241c, and waiting for the sheet bundle in the front stapler tray 402 to disappear.

  When the second page sheet is carried into the first stapling conveyance path (first conveyance path) 240a as usual, the sheet that is stopped in the prestack conveyance path 250 has a sheet leading edge of the second page. And the transport roller 241c at substantially the same timing, and are transported to the second staple transport path (third transport path) 240b in an overlapped state, and discharged to the stapler tray 402 by the stapler tray discharge roller 242. To be loaded. As shown in FIG. 3, when the selected sheet type is not a perforated sheet (a sheet without a hole), control is always performed so that only the first page is guided to the prestack conveyance path 250 (FIG. 7). Step S1 to Step S4).

  When a staple mode is selected, if a perforated sheet (for example, a sheet as shown in FIG. 2) is selected, the perforated sheet is always carried into the prestack conveyance path 250 regardless of the number of selected copies, the first page, etc. The front end is temporarily stopped by the pre-stack roller 252 before the transport roller 241c (see steps S5 to S8 in FIG. 7).

  When the next sheet of the perforated sheet is carried into the first staple transport path 240a as usual, the perforated sheet stopped in the pre-stack transport path 250 has the front end of the sheet and the transport roller 241c. The operation is performed at substantially the same position, and is transported to the second staple transport path 240b in a superposed state, and is ejected and stacked on the stapler tray 402 by the stapler tray ejection roller 242.

  When the perforated sheet is the final sheet, it is carried into the first staple conveyance path 240a as usual, and is discharged onto the stapler tray 402 by the stapler tray discharge roller 242 and stacked.

  As shown in FIG. 4, when the selected sheet is a perforated sheet, all but the last page are guided to the prestack conveyance path 250.

  The operation when a perforated sheet is selected will be described below.

  When stapling a sheet bundle including a perforated sheet and finishing it, the operator sets the perforated sheet in one of the paper feed trays 1a, 1b, and 1c shown in FIG. Next, as shown in FIG. 5, when a “paper setting” button 500 on the operation unit is pressed, setting items are displayed on the operation panel 510.

  By selecting “1. Paper feed tray setting” (see FIG. 5A) displayed on the operation panel 510, it is set in advance to which paper feed tray the perforated sheet is set. (See (a) to (c) of FIG. 5).

  Next, as shown in FIGS. 6A to 6F, by selecting “2. Paper feed paper setting”, what sheet is arranged in which position of the sheet bundle is set. be able to. At this time, when the staple mode is selected, when a perforated sheet is selected as a predetermined page, if a perforated sheet is selected on consecutive pages, selection is prohibited, and a sheet without a hole is provided between the perforated sheets. The fact that it is necessary is displayed and notified before printing is started (see step S10 to step S13 in FIG. 8).

  When the perforated sheet is set and printing is started, a sheet discharge sensor (not shown) of the copying machine main body 1 detects the sheet, and the sheet data is received before the sheet is received by the entrance roller 202 of the sheet post-processing apparatus 2. The sheet is sent from the copying machine main body 1 to the sheet post-processing apparatus 2. This sheet data includes the sheet size, form (presence / absence of holes), and the like, and is sent one by one.

  Based on the sheet data, the sheet post-processing apparatus 2 performs control in accordance with the sheet data. For example, if the sheet data includes information indicating a sheet with a hole, when a sheet is detected by an inlet sensor (not shown) of the sheet post-processing apparatus 2, the branching claw 251 is switched by a solenoid (not shown), and the sheet is conveyed in a prestack. It is prepared to be received in the path 250, and as described above, it is fed to the second staple transport path 240b while being overlapped downstream with the next sheet.

  As described above, in the present embodiment, the perforated sheet is guided to the prestack conveying path 250, and the holeless sheet introduced into the apparatus following the perforated sheet is guided to the first staple conveying path 240a. Control is performed to guide the perforated sheet and the non-perforated sheet to the second staple conveying path 240b in a superimposed state, and the sheet passing through the first staple conveying path 240a is in the stapler tray 402. The pre-stack conveyance path 250 is arranged so as to be stacked on the upper side. Therefore, even in a sheet having a large hole, it is possible to prevent catching and eliminate the waste of the sheet.

  In the present embodiment, the pre-stack conveyance path 250 has a function of temporarily stacking sheets introduced into the apparatus while the post-processing is performed on the sheets in the second staple conveyance path 240b. Have. By using the existing configuration in this way, it is possible to save parts.

  Further, in the present embodiment, an operation panel 510 capable of specifying whether or not a sheet is perforated is provided, and a display for prohibiting continuous introduction of perforated sheets into the apparatus is displayed. It is like that. For this reason, the user can recognize the prohibited items in advance, and by recognizing the failure during use and redoing, the waste of the seat and time can be eliminated.

1 is an overall configuration diagram of a sheet processing apparatus according to an embodiment of the present invention. It is a top view which shows an example of the sheet | seat with a big hole. It is a conceptual diagram at the time of using the pre-stack conveyance path | route of a sheet | seat without a hole. It is a conceptual diagram at the time of using the pre-stack conveyance path | route of a perforated sheet. It is a series of figures showing an example of a screen display of the operation panel. It is a series of figures showing an example of a screen display of the operation panel. 6 is a flowchart of the operation of the sheet processing apparatus according to the embodiment of the present invention. 6 is a flowchart of the operation of the sheet processing apparatus according to the embodiment of the present invention.

Explanation of symbols

240a First staple transport path (first transport path)
240b Second staple transport path (third transport path)
250 Pre-stack transport route (second transport route)
402 Stapler tray A Sheet processing device

Claims (5)

A first conveyance path and a second conveyance path for conveying a sheet; a third conveyance path located on the downstream side where the first conveyance path and the second conveyance path merge; and the third conveyance path In a sheet processing apparatus comprising a stapler tray that is positioned downstream of the conveyance path and temporarily stacks sheets and performs post-processing such as stapling,
A perforated sheet is guided to the second transport path, a holeless sheet introduced into the apparatus following the perforated sheet is guided to the first transport path, and the perforated sheet and the holeless sheet are A sheet processing apparatus that performs control to guide the third conveyance path in a superposed state.   2. The sheet processing apparatus according to claim 1, wherein the second conveyance path is arranged so that sheets passing through the first conveyance path are stacked on the upper side in the stapler tray.   The second transport path has a function of temporarily stacking sheets to be introduced into the apparatus while the sheets are post-processed in the third transport path. The sheet processing apparatus according to claim 1 or 2.   The sheet processing apparatus according to any one of claims 1 to 3, further comprising an operation panel capable of performing an operation capable of specifying whether or not a sheet is perforated. 5. The sheet processing apparatus according to claim 1, wherein a display prohibiting continuous introduction of perforated sheets into the apparatus is provided.

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