JP2011020768A - Sheet punching device, sheet processing device and image forming device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet punching device, a sheet processing device and an image forming device capable of reducing energy consumption. <P>SOLUTION: The sheet punching device has a punching unit 17 for punching a carried-in sheet, a punching chip storage vessel 19 for storing punching chips K generated by the punching operation of the punching unit 17, a full detecting sensor 45 for detecting that the punching chips deposited in the punching chip storage vessel 19 reach predetermined positions, and a counter for counting a punching frequency in the punching unit 17. The full detecting sensor 45 detects whether or not the punching chips in the punching chip storage vessel 19 are full by operating when the counter counts the predetermined number. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a sheet punching apparatus, a sheet processing apparatus, and an image forming apparatus that punch holes in a conveyed sheet.

  In this type of technology, punch holes are punched in the conveyed sheet, and punch waste generated by punching is stored in the punch waste storage container, and the accumulated waste is accumulated in the container up to a predetermined height. When the detection means detects, it notifies that the perforated waste is prevented from overflowing from the storage container.

  In Patent Document 1, when the accumulated dust detecting means for detecting accumulated dust in the perforated waste storage container detects the perforated waste, the detection signal from the accumulated dust detecting means is invalidated during the fall of the perforated waste. It is disclosed to detect that perforated scraps have accumulated more than a predetermined height.

  However, in the technique of Patent Document 1, even when there is almost no perforated debris accumulated in the container, the accumulated debris detection means operates every time the perforating operation is performed, and thus wasteful power consumption (energy consumption) occurs. There is a problem that.

  SUMMARY An advantage of some aspects of the invention is that it provides a sheet punching apparatus, a sheet processing apparatus, and an image forming apparatus capable of reducing energy consumption.

  In order to solve the above-mentioned problem, the invention described in claim 1 includes a punching means for punching a sheet that has been carried in, a punching waste storage container for storing punching waste generated by the punching operation of the punching means, and a punching A debris detecting means for detecting that the perforated waste accumulated in the waste storage container has reached a predetermined position; and a counting means for counting the number of times of perforation of the perforating means. It operates when a predetermined number is counted.

  According to a second aspect of the present invention, in the first aspect of the present invention, the debris detection means is also activated by turning on the main power supply of the sheet punching device.

  A third aspect of the present invention is a sheet processing apparatus including the sheet punching device according to the first or second aspect and a sheet processing unit that at least performs folding processing or binding processing of the sheets.

  According to a fourth aspect of the present invention, the sheet punching apparatus according to the first or second aspect or the sheet processing apparatus according to the third aspect and an image forming unit that forms an image on the sheet are formed. The image forming apparatus is characterized in that the sheet is perforated.

  According to the present invention, the debris detection means operates when the counting means counts the number of times of perforation of the perforation means a predetermined number of times, so even if the number of perforations is still small and almost no deposition occurs, The energy consumption can be reduced as compared with the conventional technology that always operates.

1 is a cross-sectional view illustrating a schematic configuration of an image forming apparatus according to an embodiment of the present invention. It is EE sectional drawing of the punching process part shown in FIG. It is sectional drawing which shows the punching process part shown in FIG. 1, and its peripheral part. FIG. 3 is a plan view seen from the FF position shown in FIG. 2. It is a block diagram which shows the structure of the control part in this Embodiment. It is a flowchart of this Embodiment.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. An image forming apparatus 1 according to the present embodiment includes an image forming unit 3 that forms an image on a sheet, and a sheet that is integrated with the image forming unit 3 and discharged from the image forming unit 3. A sheet processing unit (sheet processing apparatus) 5 that performs processing such as alignment is configured.

  Various processes performed by the sheet processing unit 5 are selected and performed by operating an operation panel 52 (see FIG. 5) provided in the image forming unit 3.

  In FIG. 1, the sheet (sheet) discharged from the sheet discharge roller 7 of the image forming unit 3 passes through the inlet guide plate 9 of the sheet processing unit 5 and is carried into the sheet punching processing unit 11, and is bound as necessary. After being processed by the processing unit 12 and the folding processing unit 14, the paper is discharged to predetermined trays 201, 202, and 203.

  The sheet punching processing unit 11 includes an entrance-side transport roller 13, an exit-side transport roller 15, a punching unit 17, and a punching waste storage container 19.

  The entrance-side transport roller 13 also serves as a skew correction roller, and the leading edge of the sheet transported from the image forming unit 3 is abutted against the entrance-side transport roller 13 that is stopped, and then the sheet is abutted for a certain time. After the appropriate amount of bending, the entrance-side transport roller 13 is driven to operate faster than the receiving speed by the amount of excess bending, thereby correcting the skew.

  As shown in FIGS. 2 and 3, the punching unit 17 includes a stepping motor 23 that moves the punching unit 21, and is transmitted from the stepping motor 23 to the gear / pulley 27 via the timing belt 25 to rotate. A rack 29 is engaged with the gear of the gear / pulley 27, and the rack 29 moves in the horizontal direction by the rotation of the gear / pulley 27. The rack 29 is fixed to a punch lower guide plate 31. The punch lower guide plate 31 includes a punch blade 33, a punch upper guide 34, a shaft 35, a cam 37, a holder 39, a clutch 41, and a motor 43. 21 are integrally connected, and the punching portion 21 moves in the direction (arrow G, H direction) perpendicular to the transport direction by the movement of the rack 29. The punch 43 is moved up and down by driving the motor 43 to punch holes in the sheet.

  A punch waste storage container 19 is disposed below the punching unit 17, and the punch waste K generated by the punching operation is accumulated inside the punch waste storage container 19, and the amount of deposition reaches a predetermined height. A fullness detection sensor (deposited dust detection means) 45 provided in the punch waste container 19 detects whether or not there is any. In the present embodiment, the full detection sensor 45 is a photo sensor.

  Sensors 36 and 47 are provided on the upstream side in the sheet conveyance direction of the inlet side conveyance roller 13 and on the downstream side in the sheet conveyance direction of the outlet side conveyance roller 15 to detect the sheet.

  As shown in FIGS. 3 and 4, a side edge measuring device 49 for measuring the position of the side edge of the sheet is provided between the entrance conveyance roller 13 and the punching unit 17. As shown in FIG. 4, the side edge measuring device 49 detects the distance L from the reference position P to the side edge R of the sheet, and the distance from the reference position P to the theoretical (ideal) side edge R of the sheet. The deviation amount of the sheet side edge is calculated by calculating the difference x from M. The position of the piercing portion 21 is controlled by driving the step motor 23 based on the amount of deviation to adjust the piercing position. For example, if the punching portion 21 has a distance of 7.5 mm from the home stop position to the theoretical position, in this case, if the punching portion 21 moves 7.5 mm-x mm, the punch can be punched at an appropriate position.

  With reference to FIG. 5, the structure of a control part and its effect | action are demonstrated. The control unit (CPU 1) 51 of the image forming unit 3 is connected to the operation panel 53 and the control unit (CPU 2) 53 of the sheet processing unit 5. The control unit 53 is connected to a counter 55 that measures the number of times of punching, a punching motor 43 (see FIG. 2), and a full detection sensor 45. The operation panel 53 may be a personal computer.

  When the user operates the operation panel 53 to request punch hole punching on the paper, the CPU 1 (51) on the image forming unit 3 side issues a punch hole punch command to the CPU 2 (53) on the sheet processing apparatus side. (Control C1). Thereby, CPU2 (53) drives the perforation motor 43 and opens a punch hole (control C2).

  The counter 55 for the number of punch holes is counted up, and the CPU 2 (53) acquires information on the number of punches (control C3). If the acquired number of punches is equal to or greater than a predetermined value, drive power (5 V) is supplied to the punch waste full detection sensor 45 by a signal from the CPU 2, and the punch waste full detection sensor 45 operates (control C4). ).

  When the CPU 2 (53) acquires punch waste information from the punch waste full detection sensor 45 (control C5) and detects that the punch waste is full, the CPU 2 (53) to the CPU 1 (51) is full of punch waste. A signal is sent (control C6). Under the control of the CPU 1 (53), the user is notified that punch scraps are full through the operation panel 53 and the screen of the personal computer (control C7). In this embodiment, an alarm (voice) is notified from the operation panel 53, but a character display of “full of punch scraps” may be used.

  The counter 55 may be provided on the image forming unit 3 side, connected to the CPU 1 (51), and transmits a drive signal from the CPU 1 (51) to the punch dust full sensor 45 via the CPU 2 (53). good.

  Next, punch scrap full detection control according to the present embodiment will be described with reference to the flowchart of FIG.

  First, when a punching hole drilling operation is performed by driving the punching motor 43 (step S1), the counter 55 counts the number of punching operations n (step S2).

  Then, the CPU 2 (53) determines whether or not the count n of the number of punching operations is larger than the set value (step S3), and if it is larger than the set value, a drive signal is sent to the full detection sensor 45. 45 is operated (step S4), and if the count n of the number of punching operations is smaller than the set value, the CPU 2 (53) waits for the next punch hole punching operation without sending a drive signal to the full detection sensor 45.

  When the full detection sensor 45 is activated, the CPU 2 (53) receives a detection signal from the full detection sensor 45, and determines whether the punch waste K in the punch waste storage container 19 is full. (Step S5) When the CPU 2 (53) detects full, it sends a full signal to the CPU 1 to generate an alarm from the operation panel 52 and informs the user that it is full (Step S6). The notification to the user is terminated without canceling or activating the alarm (step S7).

  When the alarm is activated, when the door opening / closing operation is performed by the user using the door opening / closing detector (step S8), a drive signal is sent to the full detection sensor 45 again, and the full detection sensor 45 is sent. To work.

  If the alarm is canceled in step S7, the punch hole punching number n is cleared (n = 0) (step S9), and the next punch hole punching operation is awaited.

  Here, the set value of the number of perforations may be changed depending on the number of perforations. For example, when the number of punches is n ≦ 10000, the set value = 2000, and when the number of punches is 10,000 <n ≦ 20000, the set value = 1000, so that the punch waste container 19 is almost full. Accordingly, it may be controlled to increase the number of times that the fullness detection sensor 45 is operated.

  On the other hand, in the present embodiment, even when power is turned on (step S10), the full detection sensor 45 is operated in step S4 to perform so-called interrupt processing. In this way, by operating the full detection sensor 45 by interruption, when the user does not throw away punch scraps even when the door is opened or closed during full alarm notification, or when the power is turned off during full notification, etc. In this case, it is possible to prevent erroneous detection and overflow of punch scraps.

  According to the present embodiment, the full detection sensor 45 operates when the counter 55 counts the number of perforations a predetermined number of times, so that energy consumption is reduced as compared with the prior art in which the full detection sensor 45 is always operating. Can be achieved.

  Further, since the fullness detection sensor 45 does not operate during the piercing operation, it is possible to prevent erroneous detection of the piercing waste falling in the perforated waste storage container.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention. For example, the sheet processing unit 5 may include only the sheet punching processing unit 11, and may not include the binding processing unit 12 and the folding processing unit 14.

DESCRIPTION OF SYMBOLS 1 Image forming apparatus 3 Image forming part 5 Sheet processing part (sheet processing apparatus)
11 Sheet punching unit (sheet punching device)
17 punching unit 19 punching waste storage container 21 punching part 45 full detection sensor (deposition waste detection means)
52 Operation panel 55 Counter (counting means)
K punch scraps (perforated scraps)

JP 2002-46926 A

Claims (4)

  The punching means for punching the sheet that has been carried in, the punching waste storage container for storing the punching waste generated by the punching operation of the punching means, and the punching waste accumulated in the punching waste storage container has reached a predetermined position. A sheet punching device comprising: a debris detection unit for detecting; and a counting unit for counting the number of times of punching of the punching unit, wherein the depositing dust detection unit operates when the predetermined number of counts is counted.   The sheet punching device according to claim 1, wherein the debris detection unit is also activated by turning on a main power of the sheet punching device.   A sheet processing apparatus comprising: the sheet punching device according to claim 1; and a sheet processing unit that performs at least sheet folding processing or binding processing.   A sheet punching device according to claim 1 or 2, or a sheet processing device according to claim 3, and an image forming unit for forming an image on the sheet, wherein the sheet after the image is formed is punched. Image forming apparatus.

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