WO2005073117A1

WO2005073117A1 - Paper treating device

Info

Publication number: WO2005073117A1
Application number: PCT/JP2005/001303
Authority: WO
Inventors: Takao Hasegawa
Original assignee: Max Co., Ltd.
Priority date: 2004-01-29
Filing date: 2005-01-25
Publication date: 2005-08-11
Also published as: KR20060130151A; CN100554112C; EP1710184A1; EP1710184A4; KR100887476B1; CN1914108A; US20070158894A1

Abstract

A paper treating device, wherein an opening/closing fence (9) is fitted to the tip of a puncher (1) on the downstream side of a paper table (5). A jog roller (12) with a torque limiter is disposed immediately before a punch unit (6). Paper fed to the paper table by a paper feed roller (3) is pressed against the opening/closing fence by the jog roller, held by right and left positioning plates, and accurately positioned. When punching treatment is performed by the punch unit, the opening/closing fence is opened, and the paper is discharged by the jog roller and discharging rollers (4).

Description

Paper Processing Equipment Technical Field>

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper processing apparatus that performs post-processing such as punching and binding in cooperation with a copier and a printer, and more particularly, to a paper processing apparatus that improves processing accuracy and increases processing speed. It is about.

Clear background technology>

book

Multifunction devices that combine an electric stapler with a copier and a printer and bind the printed paper with a stable device, and multifunction devices that combine a punch device and perform a punching process to enable the binder to be installed are known. Has been. In this type of composite equipment, high accuracy is required for the attitude control and alignment of the paper when the paper is sent to the stapler / punch device after the printing process and stapling or punching is performed. Inferior high speed is required.

For example, as a means for correcting the skew (inclination of the paper with respect to the paper feeding direction) of the paper to be fed and stacking the papers in a state where there is no positional deviation, see “Paper stacking adjustment fuzzy controller” described in Japanese Patent No. 2760127. There is. This accumulating and adjusting fuzzy control device accumulates sheets without positional deviation by correcting the inclination of the sheet by controlling the rotational speed of each of the feed rollers divided into two in the width direction of the sheet by fuzzy inference control means. Things.

There is also known a punching apparatus in which the front of the next sheet is conveyed with the front of the next sheet overlapped and conveyed, thereby shortening the processing standby time and improving the productivity. 2003-291093).

As a means to correct the orientation of the paper and feed it to the stapler without any misalignment, control the rotational speed of each feed roller divided in the width direction as in the invention described in Patent No. 2760127. To correct the paper skew The control system is complex and requires a control unit that can perform high-speed arithmetic processing, which is costly.

Further, the positioning of the paper in the paper feeding direction is generally performed by inserting the leading edge of the paper between a pair of paper discharge rollers that come into contact with each other, but since the paper contact surface is not flat, There is a problem that the positioning accuracy is low and the paper position tends to vary.

Furthermore, the configuration in which the leading edge of the paper is positioned against the fence that serves as a positioning reference has good positioning accuracy, but the paper is discharged in a reverse direction after punching or stapling. The mechanism becomes complicated and the processing speed decreases.

Furthermore, the next sheet is fed after the sheet sent to the punching device or stapler, and the front of the next sheet is placed on the back of the previous sheet and made to stand by, thereby shortening the waiting time between processes. In a configuration designed to improve processing speed, the leading edge of the next sheet abuts on the trailing edge of the previous sheet, or the next sheet enters under the previous sheet, resulting in poor feeding. There is a fear.

Also, as an example of a punch device used in this type of multi-function device, a punch that moves up and down with respect to a die is maintained at a rising standby position by a panel, and a cam presses down the punch against the panel force and pushes the punch down to the die. There is known a configuration in which a punching process is performed on a printing paper inserted between a die and a punch by fitting them together (for example, JP-A-200-139217).

A punching device that operates in cooperation with a copying machine, etc., needs to have a correspondingly high speed so that the punching process does not become a bottleneck in the overall processing speed. The punch device pushes down the punch against the panel force, so it takes time to descend. Particularly, in the case of a multi-hole punch having several tens of holes, the punching load is large, and the weight of the punch is heavier than that of a two-hole punch. In addition, although the ascent is urged by the panel and rises quickly during the ascent process, there is also a problem in that the inertia of the punch urged by the panel is large, and the time it takes to stand still is long. Further, as a punch device used in this type of composite device, there has been proposed a device in which a punch mechanism is unitized to be replaceable (for example, Japanese Patent No. 3336203). This apparatus includes means for identifying the type of the punch unit mounted on the main body, and control means for controlling the punching operation in accordance with the type of the identified punch unit. It controls punch operation timing and the like.

By unitizing the punch mechanism including the punch and the die, if the punch or the die is worn or damaged, it can be easily replaced. However, due to tolerances and assembling errors of the components that make up the pantunit, when the punch unit is mounted on the punching device, the position of the paper positioned by the paper feed mechanism or positioning mechanism on the main unit and the punch of the pantutu The positional relationship is not constant, and errors may occur in the positions of the punched holes.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a paper processing apparatus capable of performing high-speed processing with a simple configuration, and having excellent positioning accuracy of paper and stable paper feeding.

It is another object of the present invention to provide a paper processing apparatus including a post-processing device, particularly a punching device, in which a driving load is reduced, a cycle time is shortened, and a processing speed is increased.

It is still another object of the present invention to provide a sheet processing apparatus including a punching device that eliminates a deviation in the positional relationship between a punch and a die of a pantunit and a sheet and prevents a position error of a punched hole.

In order to achieve the above object, the present invention is a paper processing apparatus for feeding paper onto a paper table by paper feed means and performing a punching process or a stapling process on the paper on the paper table. At the downstream end of the paper table, an openable vertical fence is provided, and a pair of mutually contacting paper feed rollers is provided upstream of the openable fence, and the paper on the paper table is fed to the paper feed rollers. The paper is positioned by pressing against the openable fence, Provided is a paper processing apparatus configured to open the openable fence and discharge paper after a binding process.

In the paper processing apparatus, a paper feed roller provided upstream of the openable fence is mounted on a drive shaft via a torque limiting means such as a slip clutch. When the paper feed roller abuts on the openable fence, the paper feed roller stops rotating while applying a forward force to the paper by the torque limiting action, and holds the paper pressed against the openable fence. You may comprise.

Further, two paper feed rollers mounted on a drive shaft via the torque limiting means may be arranged in the paper processing apparatus at an interval in a direction perpendicular to the paper feed direction.

Also, a positioning plate and a drive mechanism for expanding and contracting the interval between each other are provided on the left and right sides of the paper table, and the paper fed onto the paper table is sandwiched from the left and right sides by the positioning plate in the left-right direction. It may be configured to correct the deviation and the posture.

Further, in the paper processing apparatus, when the interval between the positioning plates is reduced, the pair of paper feed rollers sandwiching the upper and lower surfaces of the paper are opened to release the pressing of the paper. Paper feed roller opening / closing control means for closing the feed roller may be provided.

In addition, the paper processing device temporally overlaps the steps of taking paper into the paper table, correcting the positional deviation and posture of the paper, punching or stapling, opening the openable fence, and discharging the paper. Control means for executing the program may be provided.

Further, the paper processing apparatus has a rotary flap disposed at an upstream end of the paper table, and when paper is fed onto the paper table, rotates the rotary flap to rotate the paper to the rear end upper surface of the paper. Control means for covering the flap may be provided.

Further, the punching device of the sheet processing device is a punching device that includes a die, a punch, and a punch elevating mechanism, and that lowers and raises the punch with respect to the fixed die and punches the sheet with the punch. Biased by the punch elevating mechanism The punch driving force and the panel force of the panel may be configured to cooperate to perform a punching operation. The punch lifting mechanism may include a motor, a crankshaft driven by the motor, and a link connecting the crankpin of the crankshaft to the punch.

Further, the punch device may include a click stop mechanism for holding the punch at a standby position.

In addition, the punch device mounts a disc cam having a groove formed in one place on the outer peripheral surface of the disc on the crankshaft, and makes a roller or a claw elastically contact the groove of the disc cam to move the punch to a standby position. May be provided.

Furthermore, the punching device is configured so that the punch and die incorporating the punch and die can be attached to and detached from the punching device main body, and has a paper positioning mechanism that corrects the position of the paper in the direction perpendicular to the paper transport. A means for holding the positional deviation information of the punch and the die in the direction perpendicular to the paper conveyance direction, a means for reading the positional deviation information in the punch unit, and a paper positioning mechanism in accordance with the read positional deviation information. May be provided so as to correct the position of the sheet in the direction perpendicular to the conveyance direction so as to eliminate the positional deviation between the punch and the die.

The paper positioning mechanism includes a reference positioning unit and a movable positioning unit that presses the paper against the reference positioning unit, and the position read by the position deviation cancellation control unit from the position deviation information holding unit of the unit. The position of the reference positioning unit may be modified according to the deviation information.

The position deviation information holding means may include one or a plurality of dip switches.

Further, the position deviation information holding means may include a nonvolatile memory. Brief description of drawings>

FIG. 1 is a plan view of a punch device, showing an embodiment of the present invention.

Figure 2 is a cross-sectional side view of the punch device. FIG. 3 is a rear cross-sectional view taken along line AA of FIG.

FIG. 4 is a plan view showing an arrangement of a mechanical unit of the punch device.

FIG. 5 is a side view showing the arrangement of the mechanical unit of the punch device.

FIG. 6 is a rear view showing the arrangement of the mechanical unit of the punch device.

FIG. 7 is a perspective view showing an arrangement of a mechanical unit of the punch device.

FIG. 8 is a perspective view showing an arrangement of a mechanical unit of the punch device.

Figure 9 is a perspective view of the rotary flap.

FIG. 10 is a side cross-sectional view of a sheet feeding roller and a rotary flap portion of the punch device. FIG. 11 is a perspective view showing an arrangement of a jog roller and an openable / closable fence.

FIG. 12 is a perspective view of the main body frame and the pan-cut.

Figure 13 is a rear view of the pantunit.

FIG. 14 is a plan view showing the arrangement of the mechanical unit of the pantunit.

FIG. 15 is a side view showing the arrangement of the mechanical unit of the pantunit.

FIG. 16 is a rear view showing the arrangement of the mechanical section of the pantuette.

FIG. 17 is a perspective view showing the arrangement of the mechanical unit of the pantunit.

FIG. 18 is a perspective view showing the arrangement of the mechanical unit of the pantunit.

Fig. 19 is an operation timing chart of the punching device.

FIG. 20 shows a control flow of the sheet positioning mechanism.

Reference numerals in the figure, 1 is a punching device, 3 is a feed roller, 4 is a discharge roller, 5 is a paper table, 6 is a pan tunit, 7 is a punch, 8 is a die plate, 9 is an openable fence, 12 Is a jog roller, 13 is a pinch roller, 14a is a positioning reference plate, 14b is a movable positioning plate, 15 is a rotary flap, 16 is a front paper detection sensor, 17 is a rear paper detection sensor, 27 is a tonometer limiter, and 28 is a rotation Shaft, 29 is a support shaft, 30 is a rotating link, 31 is a lever, 32 is a pinch roller lifting solenoid, 41 is a handle, 42 is a flange panel, 43 is a positioning boss, 44 is a dip switch, 45 is a switch board, and 46 is a switch board. Frame, 47 is a punch support plate, 48 is a slide guide, 49 is a link, 50 is a crankshaft, 54 is a compression coil spring, 55 is a disc cam, 56 is a stop Bar, 57 rollers, 58 compression A coil spring, 63 is a rotating shaft, 64 is a pawl, 65 is a torsion coil spring, 66 is a link, and 67 is a lever. BEST MODE FOR CARRYING OUT THE INVENTION>

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

Examples>

FIGS. 1 to 4 show a sheet processing apparatus provided with a punching apparatus 1 as a post-processing apparatus. As shown in FIG. 2, a pair of upper and lower paper feed rollers 3 are arranged at the front (right side in the figure) of the frame 2, and a pair of upper and lower paper discharge rollers 4 are arranged at the rear. The ejected paper is drawn in by the paper feed roller 3, sent backward on the horizontal paper table 5, and punched by the multi-hole pan tunnit 6 immediately before the paper discharge roller 4, and then discharged. It is configured to discharge backward by 4.

The pan-tunit 6 has a 30-hole punch 7 and a die plate 8 and an openable / closed fuse 9 on the downstream side of the paper feed (left side in Fig. 2) as a paper stopper. A punch drive motor 10 and a fence drive solenoid 11 It is equipped with. A jog roller 12 and a pinch roller 13 that feed the paper on the paper table 5 toward the openable fence 9 are placed just before the pan tunit 6, and positioning reference plates 14a are placed on both left and right ends of the paper table 5. And the movable positioning plate 14b sandwiches the paper to determine the position in the left-right direction. The jog roller 12 and the pinch roller 13 press the paper against the openable fence 9 to position the paper in the front-rear direction.

In addition, a rotary flap 15 is placed immediately after the paper feed roller 3, and the rear end of the paper drawn onto the paper table 5 by the paper feed roller 3 is pressed by the rotary flap 15 to prevent the paper from floating. It is composed.

Paper detection sensors 16 and 17 are arranged immediately before the paper feed roller 3 and slightly before the jog roller 12, respectively. When the front paper detection sensor 16 detects the paper, the paper feed roller 3 starts and moves the paper backward. When the rear paper detection sensor 17 detects the paper that has been fed, the left (lower in FIG. 4) movable positioning plate 14b when viewed from the upstream in the paper transport direction moves to the right positioning reference plate 14a to the width of the paper. Close to paper position After the misalignment is corrected and the paper abuts on the openable fence 9, punch processing is performed.

Next, the configuration of the operation mechanism will be described. 4 to 6 are three views showing the arrangement of the rollers and the punch mechanism, FIG. 7 is an arrangement view as viewed obliquely from the front, and FIG. 8 is an arrangement view as viewed obliquely from behind. The lower roller (FIG. 4) of the pair of paper feed rollers 3 is driven to rotate by a paper feed motor 18, and the rotary flap 15 is rotated by a flap drive motor 19. As shown in FIG. 9, the rotary flap I ⁵ is Yes fixed at intervals a plurality of flaps members 21 to the rotating shaft ² 0, pills second flap member 21 is tangentially from the outer peripheral surface of the sleeve portion 21a The two flaps 21b are arranged 180 degrees rotationally symmetric. A rotating plate 22 is fixed to the end of the rotating shaft 20, and two notches 22a formed at 180 ° intervals in the rotating plate 22 are sequentially detected by a photo interrupter 23 to rotate the rotating flap 21. It is configured to rotate by 180 degrees.

As shown in FIG. 10, the rotary flap 15 is located at the rear of the paper table 5 one step lower than the paper inlet 24 so that the flap 21b stops horizontally at a slightly higher position than the paper table 5. Aligned. When the paper is drawn in by the paper feed roller 3, sent downstream by the jog roller 12, and the rear end of the paper moves onto the paper table 5, the rotary flap 15 is driven to rotate 180 degrees and the paper is rotated. The rear end is pressed from above by the flap 21b. Therefore, when the next sheet P2 is pulled in, the leading end of this sheet P2 is guided over the flap 21b and onto the preceding sheet P1, so that the leading end of the following sheet P2 is positioned behind the preceding sheet P1. The sheets can be reliably stacked without colliding with the edge or entering the lower surface of the previous sheet P1.

Next, the paper positioning mechanism 104 and the jog roller 12 will be described. The movable positioning plate 14b (movable positioning portion 14b) on the left side (lower side in FIG. 4) shown in FIG. 4 is connected to a timing belt B which is wrapped around a pair of gear pulleys (not shown) which are separated to the left and right. The timing belt B is driven by a positioning plate driving motor 25 shown in FIG. 5, and the movable positioning plate 14b is moved along a slide guide (not shown) according to the rotation direction of the timing belt B. It approaches or separates toward 14a (reference positioning part 14a). The positioning reference plate 14a and the movable positioning plate 14b form a pair of positioning plates.

As shown in Fig. 20, the positioning reference plate 14a can be moved to the left and right by a fine movement mechanism 14c such as a feed screw mechanism, but is fixed during normal operation, and the control unit is mounted when the pantutt is mounted. The position correction information is read from the knit, and the fine movement mechanism 14c is driven according to the information to correct the position of the positioning reference plate a.

When the rear paper detection sensor 17 disposed between the positioning reference plate 14a and the movable positioning plate 14b detects the sent paper, the positioning plate drive motor 25 starts to move the movable positioning plate 14b to the right. Then, the distance between the positioning reference plate 14a and the movable positioning plate 14b is reduced to the width of the paper, and the center of the paper is aligned with the left and right centers of the pan tunnit 6 across the paper.

In the present embodiment, the movable positioning plate 14b is driven left and right with respect to the positioning reference plate 14a to perform the positioning of the sheet in the left and right direction, but both plates 14a and 14b are simultaneously driven to approach or close. You may comprise so that it may separate. In this case, the timing belt B is wrapped around a pair of gear pulleys (not shown) separated to the left and right (up and down in FIG. 4), and one positioning plate 14a is fixed to the front row side of the timing belt B, and the other positioning plate is fixed. Fix the plate 14b to the back row of the timing belt. The timing belt B is driven by a positioning plate drive motor 25 shown in FIG. 5, and the two plates 14a and 14b approach or separate symmetrically along a slide guide (not shown) according to the rotation direction of the timing belt B. When the paper detection sensor 17 disposed between the two plates 14a and 14b detects the sent paper, the positioning plate drive motor 25 is started to drive the two plates 14a and 14b in the approaching direction. The distance between the plates 14a and 14b is reduced to the width of the paper, and the center of the paper is aligned with the left and right centers of the pan tunit 6 across the paper.

As shown in FIGS. 5 and 11, the jog roller 12 and the discharge roller 4 serving as lower rollers located on the back side of the paper are connected to a single discharge motor 26 via a single bed / let. It is driven to rotate more. As shown in FIG. 11, the jog roller 12 is attached to the left and right of the rotating shaft 28 via a torque limiter 27 as a torque limiting mechanism. The paper is fed by pressing a pinch roller 13 serving as an upper roller located on the front side of the paper against the jog roller 12 from above, and the paper is not fed if the pinch roller 13 is lifted and separated from the jog roller 12. Both ends of the support shaft 29 of the pinch roller 13 are attached to a rotation link 30, and the pinch roller 13 is raised and lowered by pushing and pulling a lever 31 attached to the rotation link 30 by a pinch roller lifting solenoid 32. Is That is, the rotation link 30, the lever 31, and the pinch roller elevating solenoid 32 constitute a paper feed roller elevating mechanism.

Since the two jog rollers 12 are each attached to the rotating shaft 28 via the torque limiter 27, when the leading edge of one of the jog rollers contacts the openable fence 9, the jog rollers rotate. Is stopped, and the other jog roller continues to rotate, so that the paper is fed until the leading edge of the jog roller contacts the openable fence 9 to correct the skew of the paper. Also, when the paper comes into contact with the openable fence 9 and the jog roller 12 stops, the rotating shaft 28 continues to rotate, and when the openable fence 9 is opened, the jog roller 12 starts rotating and the paper rotates. Is emitted. Incidentally, the tonometer limiter 27 is constituted by a sliding clutch or the like.

Next, the punch unit 6 will be described. As shown in Fig. 12, a handle 41 is provided on the side surface of the pan tunit 6, and the pan tunit 6 can be easily replaced by being removed from the punching device 1 by grasping and pulling the hand knob 41. You. As shown in FIG. 13, positioning bosses 43 are provided on the front end surface of the pan tunnit 6 in the insertion direction and the back surface of the flange panel 42 at the rear end, and as shown in FIG. Are fitted into the positioning holes of the frame 2 to position the pan tub 6.

As shown in FIG. 13, the distance L between the back surface of the flange panel 42, which is the position reference plane of the pan-tunnit 6, and the position of the punch 7 may have a slight deviation due to the tolerance of each part or the assembly state. This causes the punch holes to be displaced in the direction perpendicular to the sheet conveyance. Therefore, the position deviation information storage means is provided in the punch unit 6. (Position deviation information holding unit 102) and sends the position deviation information to the control unit 100 of the punching device 1.The reading unit 101 provided in the punching device 1 reads the position deviation information, and the control unit 100 of the punching device 1. The position deviation elimination control unit 103 provided in the controller controls the fine movement mechanism 14c of the positioning plate 14a (reference positioning unit 14a) according to the position deviation information, and corrects the position of the paper in the direction perpendicular to the paper transport, thereby punching holes. To prevent misalignment.

More specifically, as shown in FIG. 12, a switch board 45 provided with a plurality of dip switches 44 is mounted on the pan tunit 6, and a connector plug (not shown) provided on the front end face in the insertion direction is provided with a punch device 1. The switch board 45 and the control unit 100 of the punching apparatus 1 are electrically connected to each other by fitting into a socket S provided on the frame 2. For example, in the case of a 4-bit configuration equipped with four dip switches, 16 levels of position information can be represented, and the width of the position deviation is small, so if a 4-bit signal is applied to this, extremely precise The position can be corrected. In addition to the position information, information such as the number of holes in the punch unit and the applicable paper size may be added. In addition, a nonvolatile memory may be used as the position deviation information holding unit instead of the date switch.

Next, the punch driving mechanism will be described. As shown in FIG. 3, the die plate 8 is fixed to the frame 46 of the pan tunit 6, and the punch support plate 47 on which the 30 punches 7 are mounted is engaged with the slide guide 48 whose both ends are fixed to the frame 46. They are slidably held up and down.

14 to 16 are three side views of the punch drive mechanism with the frame omitted, FIG. 17 is a perspective view as viewed obliquely from the front, and FIG. 18 is a perspective view as viewed obliquely from behind. Two links 49 are mounted symmetrically on the upper part of the punch support plate 47 so as to be able to swing back and forth, and the other ends of the links 49 are engaged with crank pins 51 at both ends of the crankshaft 50. The rotation phases of the two crank pins 51 are the same. When the punch drive motor 10 rotates the crankshaft 50, the punch support plate 47 descends and rises in parallel, and the punch is supported during one revolution of the crankshaft 50. The plate 47 and the punch 7 make one reciprocating movement from the rising standby position. Then, at the time of descending, the punch 7 is fitted to the die 8 to perform a punching process. That is, the punch drive motor 10, the link 49, and The crank shaft 50 constitutes a punch elevating mechanism.

The coil panel holder 52 mounted near the upper left and right ends of the punch support plate 47 has a vertical cylindrical portion 52a formed at the upper portion, and as shown in FIG. 3, a vertical guide bin 53 fixed to the upper portion of the frame 46. The cylindrical portion 52a is slidably fitted into the cylinder. As shown in FIGS. 14 to 18, the cylindrical portion is provided with a compression coil spring 54, and the punch support plate 47 is attached to the frame 46, and the punch support plate 47 is moved downward by the compression coil panel 54. Be energized.

A disk cam 55 having one recess formed at one place on the outer periphery is mounted on the crankshaft 50, and engages with the recess of the disk force 55 at an intermediate portion of a stop lever 56 attached to the frame 46. A roller 57 is provided, a compression coil spring 58 is interposed in a stop lever 56, and the roller 57 is brought into contact with a concave portion of the disc cam 55 to constitute a click stop mechanism of the crankshaft 50. As a result, the crankshaft 50 is maintained at the original angle, and the punch support plate 47 is fixed at the rising standby position (top dead center) against the spring force of the compression coil panel 54.

As shown in FIGS. 3 to 8, a rotary plate 59 is mounted near the left end of the crankshaft 50 (lower in FIG. 7), and a notch formed at one location on the outer periphery of the rotary plate 59 is provided. Is detected by the photo interrupter 60, and the end of one cycle and the return to origin are detected. A rotary plate 61 having a number of radial slits is mounted near the right end of the crankshaft 50. A rotary pulse encoder composed of the rotary plate 61 (FIG. 7) and a photo interrupter 62 Position detection is performed.

When the punch drive motor 10 is started and the crankshaft 50 and the disc cam 55 start rotating, the stop lever 56 and the roller 57 are pushed up, and the roller 57 is disengaged from the recess of the disc cam 55 and is moved through the crank pin 51. The power thus generated and the panel force of the compression coil panel 54 cooperate to lower the punch support plate 47 and the punch 7 to perform a punching process.

In the ascent stroke after the punch support plate 47 and the punch 7 have passed through the bottom dead center, the compression coil spring 54 rises while compressing, reaches the top dead center while decelerating, The force at which the roller 57 of the stop lever 56 engages with the concave portion of the disk cam 55 and stops at a predetermined position. In this upward stroke, the punching support plate 47 and the punch 7 are stopped by the deceleration effect of the reaction force of the compression coil spring 54. Time is reduced.

In this way, the punch drive is performed by pressing the punch support plate 47 and the punch 7 in the downward direction by the compression coil spring 54, compared with the conventional punching apparatus in which the punch is biased in the upward direction by the panel. Load and power consumption are reduced, acceleration and deceleration are improved, and the processing time for one cycle is reduced.

Next, the openable fence 9 of the punch unit 6 will be described. As shown in FIG. 11, a rotating shaft 63 of the openable / closable fence 9 is disposed above and behind the die plate 8. Plate-shaped claws 64 are attached to the rotating shaft 63 at appropriate intervals. In an initial state, the claws 64 are in vertical contact with the rear surface of the die plate 8 by the panel force of the torsion coil spring 65. The rotating shaft 63 is connected to the fence drive solenoid 11 via a link 66 and a lever 67. When the fence drive solenoid 11 is energized and the actuator is pulled in, the link 66 is pulled up and the rotating shaft 63 rotates. The pawl 64 moves away from the back of the die plate 8 to open the paper passage.

Next, an operation process of the punch device 1 will be described with reference to a timing chart of FIG. When paper is fed from the preceding copier to the entrance of the punching device 1 and the front paper detection sensor 16 is turned on, the paper feed motor 18 starts and the paper feed roller 3 draws in the paper and feeds it forward.

When the front edge of the paper touches the rear paper detection sensor 17 to turn it on, the paper discharge motor 26 starts and sends the paper inserted between the jog roller 12 and the pinch roller 13 to the rear and hits the openable fence 9. Contact At the same time, the positioning plate drive motor 25 is started to reduce the distance between the positioning reference plate 14a and the movable positioning plate 14b to a predetermined paper width, and sandwich the paper from the left and right. The feed amount from the start of the jog roller 12 to the contact of the sheet with the opening / closing fence 9 is known, and the pinch roller 13 is short after the feeding amount or the time when the sheet is considered to have contacted the opening / closing fence 9. Raise the time and release the paper pressure. In this way, if the skew of the paper is shifted, it is automatically shifted so that the sides of the paper are parallel to both plates 14a and 14b. Is corrected to the correct posture.

Also, after a certain time (time required for the rear end of the paper to move onto the paper table 5) after the rear end of the paper passes the front paper detection sensor 16, the rotary flap 15 is turned off by 180 degrees. The paper is rotated by degrees to cover the rear end of the paper from above, thereby suppressing the floating of the paper. Also, after the movable positioning plate 14b stops sandwiching the paper, the pinch roller 13 descends and elastically contacts the rotating jog roller 12, and the paper is pressed against the openable fence 9 in a correct posture. maintain. The rotating shaft 28 of the jog roller 12 and the discharge port 4 rotate until the discharge of the paper is completed, but the jog roller 12 with the torque limiter 27 interposed therebetween applies a forward force to the paper. The rotation is stopped while pressing against the openable fence 9 and the rotating shaft 28 is idling.

Then, after the pinch roller 13 is lowered, the punch drive motor 10 is started, the punch 7 is lowered and the punching operation is started, and the positioning plate 14b is driven to rotate in the reverse direction to return to the enlarged standby position. The up-and-down stroke of the punch 7 is detected by a rotary pulse encoder composed of a rotating plate 61 and a photo interrupter 62 attached to the crank shaft 50 shown in FIGS. 4 to 8, and the fence is driven when the punch 7 reaches the descending end. Activate the solenoid 11 to open the openable fence 9.

When the punch 7 starts to move up and slips out of the punch hole of the paper, the jog roller 12 whose rotation resistance has been released resumes rotation and feeds the paper, and the paper is discharged by the paper discharge roller 4 and opens and closes after a predetermined time. The fence 9 returns to the initial closing position, the discharge motor 26 stops, and the one-cycle punching process ends. In this punching device, the peripheral speed of the jog roller 12 is twice as large as the peripheral speed of the paper feed roller 3. When the trailing edge of the paper exits the paper feed roller 3, it is fed by the downstream jog roller 12 at its peripheral speed, that is, twice the speed of the paper feed roller 3, so that the next paper is over the previous paper. Even if supplied in a wrapped state, there is no possibility that two sheets will be punched in an overlapping state during punching.

In this way, by configuring the timings of the steps of paper feed, misalignment and skew correction, punching, and ejection to overlap with each other in time and partially proceed simultaneously, after completion of one step, Rather than step-by-step control to move to the next process Processing speed is increased.

Although the embodiment of the punching device has been described here, a paper feeding mechanism having a rotary flap, a posture correcting mechanism using a positioning plate, etc., and a paper positioning using an openable / closing fence. Needless to say, the present invention can be applied to other types of paper processing apparatuses. That is, in the above-described embodiment, a punch device is used as the post-processing device. However, the present invention can be similarly applied to a paper processing device having a stapler as the post-processing device. Further, the present invention is not limited to the above-described embodiments, and various modifications are possible within the technical scope of the present invention, and it is natural that the present invention extends to those modifications.

This application is a Japanese patent application filed on January 29, 2004 (Japanese Patent Application No. 2004-022148), a Japanese patent application filed on January 29, 2004 B (Japanese Patent Application No. 2004-022151), and

It is based on three patent applications filed on January 29, 2004 (Japanese Patent Application No. 2004-022154), the contents of which are incorporated herein by reference.

Industrial applicability>

An openable fence is provided at the end of the paper table, the paper is positioned against the openable fence, and after the punching process, the openable fence is opened and the paper is discharged. High accuracy and high-speed processing are possible.

In addition, by interposing a torque limiting means such as a sliding clutch on the paper feed roller that presses the paper against the openable fence, the roller drive shaft can be kept rotating, which speeds up the paper feeding and discharging. It works.

By arranging two paper feed rollers attached to the drive shaft via the torque limiting means at an interval in a direction perpendicular to the paper feed direction, one of the jog rollers has an openable fence. When the jog roller stops rotating and the other jog roller continues to rotate, the jog roller is fed until the leading edge of the jog roller contacts the openable fence, and the paper skew occurs. Is corrected.

Further, by sandwiching the sheet from the left and right by the positioning plate, it is possible to correct the positional shift of the sheet in the left and right directions and the deviation of the posture with respect to the feeding direction. In addition, by configuring the pair of paper feed rollers to open and release the paper when the positioning plate sandwiches the paper from the left and right, the paper is not stressed when the posture is corrected, and the speed of the correction is reduced. And the accuracy is improved.

In addition, the processing speed is remarkably improved by adopting a configuration in which processes such as paper feeding, paper orientation correction, punching, and paper discharging are overlapped with time.

In addition, a rotary flap is arranged at the upstream end of the paper table, and each time paper is fed onto the paper table, the rotary flap rotates to cover the upper surface of the rear end of the paper. It is possible to eliminate the possibility that paper continuously fed at short intervals may be jammed or defective feeding may occur.

Further, in the punch device of the present invention, since the punch is urged toward the die by the panel, the punch driving force of the punch elevating mechanism and the panel force of the panel cooperate with each other during the punching operation. The power consumption is reduced, and the speed from the rotation of the punch to the stop is also increased, thereby improving the processing speed. Also, it is necessary to hold the punch at the standby position against the force of the panel. However, by linking the crank pin of the crankshaft driven by the motor and the punch with a link, a punch elevating mechanism is formed, and Can be held in the standby position.

Further, by providing a tallic stop mechanism for holding the punch at the standby position, the standby position holding performance of the punch is ensured.

When a punch elevating mechanism is composed of a crankshaft and a link, a disc cam is mounted on the crankshaft and a roller or pawl is elastically contacted with the disc cam groove to ensure high precision and reliability. The punch can be held at the standby position.

Further, in the punch device of the present invention, the position deviation information of the punch and the die of the pantunit is held in the position deviation information holding means in advance, so that the position deviation is controlled by the control unit when the pantunit is mounted on the punch device. The information is read, and the control unit controls the paper positioning mechanism to correct the position of the paper in the direction perpendicular to the transport direction. As a result, even if the pan tunit is replaced, the positions of the punch holes with respect to the paper become the same, and the positions of the punch holes do not vary, thereby improving the finishing accuracy.

Claims

The scope of the claims

1. Paper table and

A post-processing mechanism that includes one of a punch device that punches the paper on the paper table and a stapler that binds the paper on the paper table, and performs a post-process including one of the punching and the binding;

An openable fence located at the downstream end of the paper table; an upper roller provided upstream of the openable fence and located on the front side of the paper; and a lower roller located on the back side of the paper. And a pair of paper feed rollers,

The paper feed roller positions the paper by pressing the paper on the paper table against the openable fence,

The openable fence is opened to discharge paper after the post-processing,

Paper handling equipment.

2. The paper feed roller is mounted on the drive shaft via a torque limiting mechanism,

When the leading edge of the paper on the paper table comes into contact with the openable fence, the rotation of the paper feed roller stops in a state in which a forward force is applied to the paper by a torque limiting action, and the paper is opened and closed. The paper processing apparatus according to claim 1, wherein the paper processing apparatus is kept pressed against the fence.

3. The paper processing apparatus according to claim 2, wherein the torque limiting mechanism includes a slip clutch.

4. The paper processing apparatus according to claim 1, wherein the paper feed roller includes two rollers arranged at an interval in a direction perpendicular to a paper feeding direction.

5. A pair of positioning plates, which are provided on both left and right sides of the paper table and are capable of expanding and contracting each other,

2. The sheet processing apparatus according to claim 1, wherein the pair of positioning plates sandwich the sheet on a sheet table from both left and right sides to perform positioning in the left-right direction.

6. In addition, a paper feed roller opening / closing control mechanism is provided,

6. The paper processing apparatus according to claim 5, wherein the paper feed roller opening / closing control mechanism releases the pressure on the paper when the interval between the positioning plates is reduced, and presses the paper after the reduction of the positioning plate is completed. .

7. The paper processing apparatus according to claim 1, wherein the operations of the paper feed mechanism, the post-processing mechanism, the openable / closable fence, and the paper feed roller are performed with time overlap.

8. A rotary flap provided at an upstream end of the paper table,

When the paper is fed onto the paper table, the rotary flap rotates to cover the upper surface of the rear end of the paper,

The paper processing apparatus according to claim 1.

9. The punching device is

Die and

A punch for lowering and raising the fixed die to punch a sheet;

A punch elevating mechanism,

A panel for urging the punch toward the die;

The punch driving force of the punch elevating mechanism and the panel force of the panel cooperate to punch a sheet. The paper processing apparatus according to claim 1.

10. The punch lifting mechanism

Motor and

The paper processing apparatus according to claim 9, further comprising: a crankshaft driven by the motor; and a link connecting a crankpin and a punch of the crankshaft.

1 1. The punch device further comprises:

The sheet processing apparatus according to claim 9, further comprising: a click stop mechanism that holds the punch at a standby position.

1 2. The click stop mechanism

A disk cam having a groove formed on the outer peripheral surface and mounted on the crankshaft;

One of a roller and a pawl in contact with the groove;

The paper processing apparatus according to claim 11, comprising:

1 3. In addition, a paper positioning mechanism that corrects the position of the paper in the left-right direction is provided.

The punch device,

A punching device body,

A pantunit which is detachable from the punch device main body and incorporates the punch and the die;

A position deviation information holding unit that is provided in the pan tunit and holds position deviation information in the left and right directions of the punch and the die;

A reading device that is provided in the punch device main body and reads the position deviation information; Comprising

The sheet positioning mechanism corrects the position of the sheet in the left-right direction according to the read positional deviation information;

The paper processing apparatus according to claim 1.

1 4. The paper positioning mechanism is

A reference positioning part,

A movable positioning unit that presses the paper against the reference positioning unit,

The position of the reference positioning unit is corrected according to the read positional deviation information,

The paper processing apparatus according to claim 13.

15. The position deviation information holding unit includes one or more dip switches.

The paper processing apparatus according to claim 13.

16. The position deviation information holding unit includes: a non-volatile memory;

The paper processing apparatus according to claim 13.