JP5009740B2 - Paper punching device, paper processing device provided with paper punching device, and image forming device provided with paper punching device - Google Patents

Description

  The present invention relates to a paper punching device that punches punched holes in a loaded paper, a paper processing device that includes the paper punching device, and an image forming apparatus that includes the paper punching device.

  An image forming apparatus such as a copying machine or a printer is known in which a punching device for receiving a sheet discharged from the image forming apparatus and punching a punch hole in the sheet is attached (for example, Patent Documents). 1).

Japanese Patent Laid-Open No. 7-119358

  According to the apparatus disclosed in Patent Document 1, a sheet sent from an image forming apparatus is temporarily stopped by a stopper mechanism, and punched holes are punched by the punching device on the stopped sheet. Since the sheet is stopped while the sheet is being conveyed in this way, the time required for the sheet is inevitably required, and the image forming apparatus with a high processing speed cannot be supported.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a paper punching device and a paper that perform punching processing without stopping the paper to cope with high-speed productivity, and further correct the skew of the paper to improve the precision of punching. Provided are a paper processing device provided with a punching device and an image forming apparatus provided with the paper punching device.

Means for Solving the Problems and Effects of the Invention

Sheet punching device according to the present invention, the sheet punching device comprising: a sheet conveying means for conveying the sheet in the sheet conveyance direction, and a perforated portion drilling a reciprocating punch holes in the vertical direction against the sheet surface of the sheet A linear guide for moving and guiding the perforation unit horizontally in the paper conveyance direction, and a timing belt for moving the perforation unit along the linear guide, and a conveyance speed of the paper conveyed by the paper conveyance unit And punching holes are punched in the paper being transported at the same speed as the moving speed of the punching portion moved by the timing belt .

  With the above-described configuration, punch holes can be continuously punched without stopping the paper, so that the productivity of the punching process can be increased, thereby supporting an image forming apparatus whose processing speed is increased. .

  In addition, the paper conveying means is characterized in that the rear end of the paper is pushed with a nail and conveyed, so that punch holes can be punched in the paper with the skew of the paper being conveyed being corrected. The accuracy of the drilling position can be improved.

  In addition, a plurality of claws are provided in parallel in a direction perpendicular to the paper conveyance direction, and the plurality of claws push and convey the rear end of the paper, thereby providing a plurality of places in a direction perpendicular to the conveyance direction. Since the rear end of the sheet is positioned, skew correction accuracy can be improved. In addition, a plurality of claws are provided in parallel on the upstream side and the downstream side in the paper transport direction, so that other claws are located at the trailing edge of the next paper with respect to the nails in the position to push out the paper. Since the time interval for pressing and conveying the paper can be shortened, productivity can be improved.

  Also, the claw can be freely moved in and out of the paper conveyance path through which the paper is conveyed, and the claw is sunk and retracted from the paper conveyance path by the conveyed paper, and the paper is conveyed when the paper passes through the claw. By returning to the path and returning it, the claw pushes the rear edge of the paper to convey it, so that the claw does not interfere with the conveyance of the paper conveyed on the paper conveyance path, causing a conveyance failure Without having to do so, the rear end of the sheet can be reliably pushed and conveyed with the nail. In addition, the paper transporting means and the punching unit are operated by a single drive source, so that the same driving can be performed by a single drive source, and the moving speed of the punching part and the transporting speed of the paper transporting means are set to the same speed. Is mechanically possible, and the drilling accuracy can be increased.

  Further, it is possible to provide a sheet processing apparatus and an image forming apparatus having the above-described configuration.

  Hereinafter, a first embodiment of the present invention will be described with reference to the examples shown in the drawings. FIG. 1 is a schematic diagram of a sheet processing apparatus attached to an image forming apparatus such as a copying machine or a printer. In FIG. 1, the paper W discharged from the discharge roller CP1 of the image forming apparatus CP is transported by a paper transporting means provided in a paper transport path A in which the paper W provided in the paper processing apparatus FS is transported. . This sheet conveying means includes a conveying roller FS1 and a conveying continuation roller FS2. The transport roller FS1 receives the paper W discharged from the discharge roller CP1, and transports it to the downstream side in the paper transport direction T. The conveyance continuation roller FS2 is disposed downstream of the conveyance roller FS1 in the paper conveyance direction T, receives the paper W conveyed by the conveyance roller FS1, and further conveys it to the downstream side in the paper conveyance direction T.

  Between the transport roller FS1 and the transport continuation roller FS2, a punching unit 1 as a paper punching unit for punching punched holes in the paper W is provided. The first paper punching device P is constituted by the paper punching means and the paper transporting means.

  A branch claw FS3 is provided downstream of the first paper punching device P in the paper conveyance direction T. By switching the branch claw FS3, the conveyed paper W is conveyed onto the paper discharge tray FS4. It is branched into a straight conveyance path B, a conveyance path C for conveyance to the discharge section FS5, or a conveyance path D for conveyance to a unit portion (not shown) for predetermined post-processing, for example, staple processing. ing. Each transport path is provided with various rollers FS6 for transporting the paper W.

  FIG. 2 is a schematic plan view showing the first paper punching device P, and FIG. 3 is a schematic side view thereof. In FIGS. 2 and 3, the transport roller FS1 and the transport continuation roller FS2 as the paper transport means are respectively provided. Motors FS7 and FS8 are connected, and rotation is controlled by these motors FS7 and FS8. A paper trailing edge detection sensor 2 for detecting the trailing edge W1 (upstream in the paper conveyance direction T) of the conveyed paper W is provided upstream of the conveyance roller FS2 in the paper conveyance direction T. As the sheet trailing edge detection sensor 2, a sensor that optically detects the trailing edge W1 of the sheet W is used. However, the present invention is not limited to this, and other methods may be used.

  A punching unit 1 as a paper punching unit in the first paper punching device P includes a drive shaft 4 connected to a drive motor 3 such as a stepping motor as a drive source, and a paper transport direction T parallel to the drive shaft 4. A driven shaft 5 is provided on the upstream side. A driving pulley 4a is provided at both ends of the driving shaft 4, and a driven pulley 5a is provided at both ends of the driven shaft. Timing belts 6 and 6a are hung on the driving pulley 4a and the driven pulley 5a to constitute a driving unit 1a. A perforation unit 7 is disposed between the timing belts 6 and 6a of the drive unit 1a. The punching unit 7 is connected to the timing belts 6 and 6a and is controlled to move upstream and downstream in the paper transport direction T by the driving unit 1a.

  The punching unit 7 is provided with a passage 7a through which the paper W transported through the paper transport path A can freely pass, and a punch blade 7b for punching punch holes in the paper W in the passage 7a. It has been. The punch blade 7b is operated by a solenoid mechanism (not shown) or a vertical movement mechanism 7c that is a combination of a rotational drive source and a cam mechanism. Further, the punch blade 7b is fixedly or movablely arranged at a predetermined interval in a direction orthogonal to the paper transport direction T.

  Further, the perforation unit 7 is provided with a detection plate 7 d for detecting the position of the perforation unit 7 by the detection sensor 8. The position where the detection plate 7d is detected by the detection sensor 8 is set as the home position (standby position) of the punching unit 7. This home position is located on the upstream side in the paper transport direction T, close to the transport roller FS1. Further, the perforation unit 7 is connected to a slide body 9a slidably attached to the linear guide 9 in order to make its linear movement smooth.

  Further, the motor FS7 of the transport roller FS1, the motor FS8 of the transport continuation roller FS2, the paper trailing edge detection sensor 2, the drive motor 3 that moves the punching unit 7, the vertical movement mechanism 7c that operates the punch blade 7b, A detection sensor 8 for detecting the detection plate 7d of the punching unit 7 is connected to the control device CB. The control device CB is a microcomputer. Since the configuration of this microcomputer is well known, detailed description is omitted, but it includes an I / O port, a CPU, a ROM, and a RAM, which are connected by a bus. Of the ROM and RAM functioning as the storage unit, the ROM stores various known programs for control necessary for calculations and the like.

  Next, the operation of the first paper punching device P according to this example will be described. First, as an initial state, the punching unit 7 is kept at the home position. When the perforation unit 7 moves and the detection plate 7d is detected by the detection sensor 8, this standby state is determined to be a standby state by the control device CB, and the drive motor 3 for moving the perforation unit 7 is controlled to stop. .

  Thereafter, the paper W discharged from the image forming apparatus CP is received by the transport roller FS1, and the rear end W1 of the paper W transported by the transport roller FS1 is detected by the paper rear end detection sensor 2, and the transport after the detection. The pulses of the motor FS7 of the roller FS1 are counted.

  Based on this count number, if the trailing edge W1 of the paper W passes the transport roller FS1, the paper W enters the passage 7a of the punching unit 7, and the punch blade 7b reaches the punching position of the paper W. The vertical movement mechanism 7c is operated by the punch blade 7b while driving the drive motor 3 for moving the punching unit 7 so that the moving speed of the punching unit 7 is moved at the same speed as the conveyance speed of the paper W. Punch holes are punched in the paper W.

  The paper W in this state is received by the conveyance continuation roller FS2, and the paper W is conveyed at the same speed as the conveyance roller FS1. Thereafter, the punching unit 7 is returned to the home position to stand by in order to punch holes in the paper W to be conveyed next. Thereafter, the same control is executed to enable single processing for each sheet or continuous processing for a plurality of sheets.

  Next, the second paper punching device P1 in another embodiment will be described. The present embodiment is an example in which the paper transporting means of the first paper punching device P in the first embodiment is modified. In this example, there is a possibility that skew or the like may occur before being transported to the punching position due to error or eccentricity of the roller diameter in the paper transporting means, and the punching position may vary, so a configuration for correcting this is added. It has been made. In the description of the configuration, the configuration is the same as that of the first embodiment except for the paper transport unit, and thus description thereof will be omitted as appropriate.

  In this example, as shown in FIGS. 4, 5, and 6, the paper conveyance unit is configured by disposing a skew correction conveyance device 11 on the downstream side of the conveyance roller FS <b> 1 in the paper conveyance direction T. The skew correction transport device 11 includes a drive shaft 13 connected to a correction transport drive motor 12 such as a stepping motor as a drive source, and a driven shaft disposed on the upstream side in the paper transport direction T in parallel with the drive shaft 13. 14, a drive pulley 13a is provided in the middle of the drive shaft 13, and a driven pulley 14a is provided in the middle of the driven shaft 14 at a predetermined interval perpendicular to the paper transport direction T. The driving pulley 13a and the driven pulley 14a are wound around belts 16 and 16a and arranged in parallel to form a driving portion 11a.

  On the belts 16 and 16a, claws 17 and 17a for abutting and pushing out the rear end W1 of the paper W positioned in the paper transport path A are arranged in parallel in a direction orthogonal to the paper transport direction T. Moreover, the position which the nail | claws 17 and 17a detect by the detection sensor 18 connected to the control apparatus CB is set to the home position of the nail | claws 17 and 17a. This home position is located on the upstream side in the paper transport direction T close to the transport roller FS1, and on the lower movable side of the wound belts 16 and 16a so as to retract outside the paper transport path A except for skew correction. The claws 17 and 17a are positioned.

  Next, the operation of the second paper punching device P1 according to this example will be described. First, as an initial state, the punching unit 7 is kept at the home position. When the perforation unit 7 moves and the detection plate 7d is detected by the detection sensor 8, this standby state is determined to be a standby state by the control device CB, and the drive motor 3 for moving the perforation unit 7 is controlled to stop. . Further, as an initial state, the claws 17 and 17a are also kept at the home position. When the pawls 17 and 17a are detected by the detection sensor 18, the standby state is determined by the control device CB, and the correction conveyance drive motor 12 for moving the pawls 17 and 17a is controlled to stop.

  Thereafter, the paper W discharged from the image forming apparatus CP is received by the transport roller FS1, and the rear end W1 of the paper W transported by the transport roller FS1 is detected by the paper rear end detection sensor 2, and the transport after the detection. The pulses of the motor FS7 of the roller FS1 are counted.

  Based on this count number, the paper W enters the passage 7a of the punching unit 7, and the rear end W1 of the paper W passes through the transport roller FS1 and reaches the upper surface side of the belts 16 and 16a of the skew correction transport measure 11. For example, the claws 17 and 17a waiting at the home position approach the rear end W1 of the paper W and are moved to a position where the rear end W1 can be pushed out.

  Then, the punch blade 7b of the punching unit 7 punches the paper W while the rear end W1 of the paper W that has reached the upper surface side of the belts 16 and 16a is pushed by the claws 17 and 17a to be conveyed downstream in the paper conveyance direction T. Is reached, the drive motor 3 that moves the punching unit 7 is driven and controlled so that the moving speed of the punching unit 7 is moved at the same speed as the transport speed of the paper W that is pushed by the claws 17 and 17a. However, the vertical movement mechanism 7c is operated to punch holes in the paper W by the punch blade 7b.

  Thereafter, the punching unit 7 and the claws 17 and 17a are returned to their home positions and made to stand by in order to make punch holes in the next paper W to be conveyed. Thereafter, the same control is executed to enable single processing for each sheet or continuous processing for a plurality of sheets.

  Further, as shown in FIG. 7, a plurality (two in this example) of the claws 17 and 17a are arranged at predetermined intervals along the winding direction of the belts 16 and 16a (upstream and downstream sides of the paper conveyance direction T). In this case, with respect to the claw 17 that is in a position to push out the paper W, the other claw 17a approaches the home position (sensor 18), so that the next paper W is processed. Since the time interval up to can be shortened, productivity can be improved.

  Next, a third paper punching device P2 in another embodiment will be described. This embodiment is an example in which the claws 17 and 17a of the skew correction transport device 11 in the second embodiment are deformed. Since the configuration other than the sheet conveying unit is the same as that of the first embodiment, description thereof will be omitted as appropriate.

  As shown in FIGS. 8 and 9, the claw 27 in the skew correction transport device 11 is arranged on the upper surface side of the belts 16 and 16a so as to be able to appear and disappear in the paper transport path A above the belts 16 and 16a. The claw 27 is provided with an orthogonal surface 27a that comes out of the sheet conveyance path A and is orthogonal to the sheet conveyance direction T when the sheet W is pressed on the surface that contacts the rear end W1 of the sheet W. When the leading edge W2 (downstream in the paper transport direction T) of the paper W to be contacted, the claw body 27c is formed in a triangular cross section so as to have an inclined surface 27b for receiving the force and swinging downward. ing.

  The claw body 27c is attached to a support stay 27d provided on the upper surfaces of the belts 16 and 16a so that the base of the claw body 27c can be rotated. The orthogonal surface 27a side of the claw body 27c is swingable in the vertical direction. The claw body 27c is elastically urged clockwise by an arrow about a rotation fulcrum by a spring 27e, and can be retracted by being retracted from the paper transport path A when the paper passes. That is, as shown in FIG. 9, as the paper W is moved, the claw main body 27c is pushed by the leading end W2 of the paper W, rotates counterclockwise, sunk from the paper transport path A, and then retreats. W is further conveyed. At this time, the claw body 27c is in sliding contact with the back surface of the paper W and maintains the retracted state. When the trailing edge W1 of the paper W passes through the claw body 27c, the claw body 27c rotates clockwise and returns to the paper conveyance path A, and the rear surface of the paper W is returned by the orthogonal surface 27a of the claw body 27c. The end W1 can be pushed out.

  Next, the operation of the third paper punching device P2 according to this example will be described. First, as an initial state, the punching unit 7 is kept at the home position. When the perforation unit 7 moves and the detection plate 7d is detected by the detection sensor 8, this standby state is determined as a standby state by the control device CB (see FIG. 5), and the drive motor 3 for moving the perforation unit 7 (See FIG. 5) is controlled to stop. In addition, as an initial state, the claw 27 is also kept at the home position. When the claw 27 is detected by the detection sensor 18, this standby state is determined to be a standby state by the control device CB, and the correction conveyance drive motor 12 (see FIG. 5) for moving the claw 27 is controlled to stop.

  Thereafter, the paper W discharged from the image forming apparatus CP is received by the transport roller FS1 (see FIG. 5), and the rear end W1 of the paper W transported by the transport roller FS1 is the paper rear end detection sensor 2 (see FIG. 5). ) And the pulses of the motor FS7 (see FIG. 5) of the transport roller FS1 after the detection are counted.

  Based on this count number, the paper W enters the passage 7a of the punching unit 7, the rear end W1 of the paper W passes through the transport roller FS1 and the claw 27, and the rear end of the paper W is in front of the orthogonal surface 27a. If W1 reaches, the trailing edge W1 of the paper W is pushed by the claw 27 and conveyed to the downstream side in the paper conveyance direction T, and if the punch blade 7b of the punching unit 7 reaches the punching position of the paper W, the punching is performed. The vertical movement mechanism 7c is operated while the drive motor 3 that moves the punching unit 7 is driven and controlled so that the movement speed of the unit 7 is moved at the same speed as the conveyance speed of the paper W that is pushed by the claw 27 and conveyed. A punch hole is punched in the paper W by the punch blade 7b.

  Further, in the examples shown in FIGS. 10 and 11, the correction conveyance drive motor 12 as the drive source of the sheet conveyance means and the drive motor 3 as the drive source of the punching unit 7 are used as a single drive source. One drive source (in this example, the drive motor 3) is used. Then, the driven shaft 5 and the drive shaft 14 are connected by a connecting belt 26 via pulleys 25 and 24, and are driven by the same drive source, whereby the moving speed of the punching unit 7 and the transport speed of the paper W are the same. Therefore, the drilling accuracy can be increased.

  Further, the sheet punching devices P, P1, and P2 may be integrally configured on the image forming device CP side or the sheet processing device FS side, or may be configured integrally with the image forming device CP and the sheet processing device FS. Can do.

1 is a schematic view of a sheet processing apparatus attached to an image forming apparatus according to the present invention. 1 is a schematic plan view of a paper punching device. FIG. 2 is a schematic side view of a paper punching device. FIG. 6 is a schematic diagram of another embodiment of a sheet processing apparatus attached to the image forming apparatus. FIG. 7 is a schematic plan view of another embodiment of the paper punching device. The schematic side view of other embodiment of a paper punching apparatus. The schematic side view of other embodiment of a paper punching apparatus. The schematic side view of other embodiment of a paper punching apparatus. The figure which shows the operating state of the nail | claw of a paper punching apparatus. FIG. 7 is a schematic plan view of another embodiment of the paper punching device. The schematic side view of other embodiment of a paper punching apparatus.

Explanation of symbols

A Paper transport path CP Image forming device FS1 Transport roller (paper transport means)
FS2 Continuation roller (paper conveyance means)
T Paper transport direction P, P1, P2 Paper punching device W Paper W1 Rear end 1 Punching part (paper punching means)
1a Drive unit 17, 17a, 27 Claw 11 Skew correction conveyance device (paper conveyance means)
11a Drive unit

Claims (8)

Paper transport means for transporting paper in the paper transport direction;
In sheet punching device that includes a perforated portion that punches holes reciprocates vertically against the paper surface of the paper,
A linear guide that moves and guides the punching portion horizontally in the paper conveyance direction, and a timing belt that moves the punching portion along the linear guide ;
The conveyance speed of the paper conveyed by the paper conveyance means and the movement speed of the punching portion moved by the timing belt are set to the same speed so as to punch holes in the paper being conveyed. Paper punching device.   The paper punching device according to claim 1, wherein the paper transporting unit transports the paper by pushing a rear end of the paper with a claw.   The paper punching device according to claim 2, wherein a plurality of the claws are provided in parallel in a direction orthogonal to the paper transport direction, and the rear ends of the paper are pushed and transported by the plurality of claws.   The paper punching device according to claim 2 or 3, wherein a plurality of the claws are provided in parallel on the upstream side and the downstream side in the paper transport direction.   The claw can be moved into and out of the paper conveyance path through which the paper is conveyed, and the claw is retracted from the paper conveyance path by the conveyed paper, and the paper passes through the claw. 5. The paper punching device according to claim 2, wherein the paper punching device returns to the paper transport path at the time when the paper is transported, and the rear end of the paper is pushed and transported by the claw.   6. The paper punching device according to claim 1, wherein the paper transport unit and the punching unit are operated by a single drive source.   A sheet processing apparatus comprising the sheet punching apparatus according to claim 1.   An image forming apparatus comprising the paper punching device according to claim 1.

Images