JP2009291881A - Paper sheet punching device and image formation system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a paper sheet punching device which has a simple and highly reliable mechanism and punches a paper sheet by simply switching the number of punching holes. <P>SOLUTION: The paper sheet punching device 100 comprises: a punch pin 101 for forming a rack gear A103 and a rack gear B104 and forming holes on the paper sheet by moving in the axial direction; a slider 127 for forming a first slider gear 128 and a second slider gear 129 and reciprocating in a direction crossing with the moving direction of the punch pin 101 by receiving driving force from a drive source such as a motor 121; and first and second pinion gear mechanisms 130, 140 for converting reciprocating movements of the slider 127 into moving movements of the punch pin 101 by being engaged with the first and second slider gears 128, 129 of the slider 127, and the rack gears A103, B104 of the punch pin 101. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a paper punching device that performs a punching process on paper (sheet) and an image forming system including the paper punching device.

There have been many proposals for a paper punching device that performs processing such as folding, punching, and stapling on a recorded paper discharged from an image forming apparatus such as a printer or a copying machine.
For example, in Patent Document 1, in a sheet material punching device that forms a hole row in a sheet material (paper) in cooperation with a reciprocating punch and a die hole corresponding to the punch, a part of the punching reaction force is And a drive arm that reciprocates in the direction of the hole array by the driving force of the drive source, and a coupling body that has a rotation fulcrum and rotates by engaging with the drive arm. There has been proposed one provided with a cam mechanism for converting the rotational movement of the connecting body into the punching direction movement of the punch.

  Further, as another patent document, a technique is disclosed in which a plurality of punches are divided into a first group and a second group in order to change the position and the number of holes in the paper, and each is operated by driving a cam. (For example, refer to Patent Document 2). In addition, a technique is disclosed in which two types of cams are prepared, and these are simultaneously reciprocated along the drive shaft to change the number of perforated holes in the paper (see, for example, Patent Document 3). Further, by using a cam and a follower, the first group of punches are moved up and down by the reciprocating movement of the reciprocating member in the first movable range to reveal a predetermined number of perforations, and in the second movable range of the reciprocating member. When the second group of punches are moved up and down by the reciprocating movement to reveal fewer than a predetermined number of punched states, the first and second group of punches are selectively operated according to the movement of the reciprocating member. Thus, a technique for performing a different number of drilling steps is disclosed (for example, see Patent Document 4).

Japanese Patent No. 3995193 JP 2001-198889 A JP 2002-219893 A WO2004 / 035274

Here, in response to a request to adjust the number of punches, dedicated units for 2-holes, 3-holes, and 4-holes have been prepared in the past, but the product configuration is complicated and the number of parts increases. That was a problem. In addition, since the conventional technique for switching the number of perforations uses a complicated mechanism such as a cam or a follower, not only does the cost of the apparatus increase significantly, but also the reliability of the apparatus cannot be avoided. There was also a problem.
The present invention has been made to solve such a conventional problem, and it is a main object of the present invention to provide an apparatus for punching paper by using a simple and reliable mechanism and easily switching the number of punches. And

  For this purpose, the paper punching device to which the present invention is applied has a first rack gear, and has a punch pin that forms a hole in the paper by moving in the axial direction, and a second rack gear. And a slider that reciprocates in a direction crossing the direction of movement of the punch pin in response to a driving force from the driving source, a sector pinion gear and / or a toothless pinion gear, and includes a first rack gear and a second rack gear. And a gear conversion mechanism that meshes with the rack gear to convert the reciprocating motion of the slider into the moving motion of the punch pin.

  Here, the slider performs a reciprocating operation using one direction and a reciprocating operation using the other direction, and the gear conversion mechanism moves the punch pin when the slider reciprocates using the one direction. If the slider is moved and the slider reciprocates in the other direction, the punch pin is not moved. By selecting a combination of the gear conversion mechanism and the punch pin, the punch pin to be punched is arbitrarily selected. be able to.

  The gear conversion mechanism includes a first sector pinion gear that meshes with the second rack gear of the slider and a second sector pinion gear that meshes with the first rack gear of the punch pin, and the second sector shape. The pinion gear may be characterized in that a degree of freedom of rotation is allowed in part with respect to the first sector pinion gear. Depending on how the gear conversion mechanism is used, for example, it is possible to operate one punch pin corresponding to both a reciprocating operation using one direction and a reciprocating operation using the other direction.

  Further, a plurality of the punch pins are arranged in a direction in which the slider reciprocates, and at least one of the plurality of punch pins has a rack gear A on one side across the axis of the punch pin, A rack gear B is provided on the other side of the shaft center, the first gear conversion mechanism constituting the gear conversion mechanism is opposed to the rack gear A of the punch pin, and the first gear conversion mechanism is reversed. If the second gear conversion mechanism is opposed to the rack gear B of the punch pin, the punch pin can be perforated by a reciprocating operation using one direction and a reciprocating operation using the other direction. It becomes.

  Still further, the gear conversion mechanism is characterized in that when the slider reciprocates in the other direction, the tooth pinion portion of the tooth chip pinion gear faces the slider so as not to move the punch pin. By doing so, it is possible to realize punch pin operation control accompanying the reciprocating motion of the slider with a simple configuration.

  On the other hand, from another point of view, the paper punching device to which the present invention is applied has a second rack gear and receives the driving force from the driving source to return in one direction. The slider operates a punch that forms a hole in a sheet by having a first rack gear having a slider that performs the operation and a second reciprocating operation that returns in the other direction, and a first rack gear. A plurality of punch pin groups arranged so as to intersect the axial direction in the direction, the second rack gear of the slider and the first rack gear of the punch pin, and the first reciprocating motion of the slider A first gear mechanism that operates the punch pin and does not operate the punch pin by the second reciprocating operation; the second rack gear of the slider; and the first rack gear of the punch pin. A second gear mechanism that engages and operates the punch pin by the second reciprocating motion of the slider and does not operate the punch pin by the first reciprocating motion, and the punch pins constituting the punch pin group, The first gear mechanism and / or the second gear mechanism are engaged with each other.

  Here, only the first gear mechanism is meshed with the punch pins constituting the first punch pin group in the punch pin group, and the punch pins constituting the second punch pin group in the punch pin group are If only the second gear mechanism, or the first gear mechanism and the second gear mechanism are meshed together, a combination of gear mechanisms, for example, double drilling and 4 It is possible to select continuous drilling.

  Further, the first gear mechanism is meshed with one side sandwiching the axis of the punch pins constituting the second punch pin group, and the second gear mechanism is disposed on the other side sandwiching the axis of the punch pins. The punch pins constituting the second punch pin group are operated by meshing and reciprocating both the first reciprocating operation and the second reciprocating operation of the slider.

  Furthermore, an image forming system to which the present invention is applied includes an image forming apparatus that forms an image on a sheet, and a sheet punching device that punches holes at a predetermined position of the sheet output from the image forming apparatus. The apparatus has a second rack gear, and receives a driving force from a driving source, and performs a first reciprocating motion returning in one direction and a second reciprocating motion returning in the other direction. A punch pin group having a first rack gear and a plurality of punch pins that move in the axial direction so as to form holes in the paper so that the axis direction intersects the direction in which the slider operates; The slider engages with the second rack gear of the slider and the first rack gear of the punch pin, operates the punch pin by the first reciprocating motion of the slider, and operates the punch pin by the second reciprocating motion. A first gear mechanism that does not operate the pin, and the second rack gear of the slider and the first rack gear of the punch pin, and the punch pin is operated by the second reciprocating motion of the slider. A second gear mechanism that does not operate the punch pin by one reciprocating operation, and only the first gear mechanism is meshed with a punch pin constituting a predetermined punch pin group in the punch pin group, and the punch pin Only the second gear mechanism, or both the first gear mechanism and the second gear mechanism are meshed with punch pins constituting other punch pin groups except for the predetermined punch pin group in the group. Features.

  According to the present invention, it is possible to provide an apparatus for punching paper by using a simple and highly reliable mechanism and easily switching the number of punches.

[Embodiment 1]
Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
(Image forming system)
FIG. 1 is a diagram showing an overall configuration of an image forming system 1 to which the exemplary embodiment is applied. An image forming system 1 shown in FIG. 1 performs post-processing on an image forming apparatus 2 such as a printer or a copier that forms a color image by an electrophotographic method, and a sheet on which a toner image is formed by the image forming apparatus 2 And a paper processing device 3 for performing the above. The sheet processing apparatus 3 includes a conveying apparatus 10 that conveys the sheet output from the image forming apparatus 2 to the downstream side, a stapler for end binding, a compile tray that collects and bundles sheets, and a folding line in the sheet. A first post-processing device 30 including a folding line unit to be attached, and a second post-processing device 50 provided further downstream of the first post-processing device 30 and including, for example, a stapler for saddle stitching. Yes. In addition, the sheet processing apparatus 3 includes a control unit 20 that controls the entire sheet processing apparatus 3, and the control unit 20 is provided in the first post-processing apparatus 30, for example.

  As shown in FIG. 1, the conveyance device 10 of the paper processing device 3 includes an entrance roller 11 that is a pair of rollers that receive printed paper that is output via the discharge roller 9 of the image forming device 2, and A punching device (paper punching device) 100 for punching paper received by the entrance roller 11 is provided. The entrance roller 11 can also be provided with a registration function for aligning the paper by, for example, paper stop / conveyance control when the paper is delivered to the punching device 100. Further, the transport apparatus 10 further downstream of the punching apparatus 100 is a first transport roller 13 that is a pair of rollers that transport the paper to the downstream side, and a pair that transports the paper toward the first post-processing apparatus 30. And a second conveying roller 14 which is a roller.

  The first post-processing device 30 of the paper processing device 3 includes a receiving roller 31 that is a pair of rollers that receive paper from the transport device 10, and a folding unit 32 that applies a folding line to the conveyed paper. The first post-processing device 30 includes an exit sensor 33 that is provided on the downstream side of the folding line unit 32 in the conveyance path, detects a sheet, a compile tray 35 that collects and stores a plurality of sheets, and a compile tray. An exit roll 34, which is a pair of rollers for discharging the paper toward 35, is provided. In addition, a main paddle 36 and a sub paddle 37 that are configured by rotating paddles for pushing the rear end of the sheet toward an end guide (described later) of the compilation tray 35 are provided. Further, an eject roll 38 is provided for transporting the sheet bundle accumulated on the compilation tray 35 to the second post-processing device 50 on the downstream side.

  Further, the first post-processing device 30 includes an end binding stapler 40 for binding the end of the sheet bundle, a stacker tray (stacking unit) 70 for stacking the post-processed sheet bundle so that the user can easily take it, and a control unit. 20, a tray driving motor 71 for raising / lowering the stacker tray 70 is provided. Furthermore, the first post-processing device 30 has an upper surface detection sensor 72 that detects the upper surface height of the stacker tray 70 so that the upper surface height of the sheet bundle is made constant by the control unit 20. Is controlling.

  Further, the second post-processing device 50 includes a stapler unit 60 as a saddle stitching stapler that staples the substantially central portion of the sheet bundle to be conveyed. A stacker tray 70 is positioned below the stapler unit 60, and the sheets after being stapled by the stapler unit 60 are sequentially stacked on the stacker tray 70. The stapler unit 60 is positioned on the paper transport path when stapling, and retracts from the paper transport path when the staple is finished and discharged.

(Configuration of punching device)
Next, the perforating apparatus 100 will be described in detail.
2-6 is explanatory drawing which showed the structure of the punching apparatus 100 with which this Embodiment 1 is applied. 2 is a perspective view of the punching device 100, FIGS. 3A and 3B are explanatory diagrams showing the configuration of the punching device 100 including the motor 121, and FIGS. 4A and 4B are features of the punching device 100. FIG. It is explanatory drawing for demonstrating a typical motion. 3 and 4, the third punch pin 101c and the fourth punch pin 101d are omitted for easy understanding. 5 and 6 illustrate the overall movement of the punch pin group to which the first embodiment is applied.

  As shown in FIG. 2, the punching device 100 has a plurality (four in the first embodiment) of punch pins 101 (first punch pin 101a, second punch pin) that move in the axial direction to form holes in the paper. 101b, third punch pin 101c, and fourth punch pin 101d) are arranged to constitute a group of punch pins. In the first embodiment, the first punch pin 101a and the fourth punch pin 101d constitute a first punch pin group, and the second punch pin 101b and the third punch pin 101c constitute a second punch pin group. ing.

  As shown in FIG. 3, these punch pins 101 are provided with a pin tip 102 that starts to be cut in contact with the paper, and a first rack gear 150 that transmits a driving force from a driving source described later to the pin tip 102. Have. The first rack gear 150 has a rack gear A103 formed on one side with the axis (center of the shaft) of the punch pin 101 interposed therebetween, and the axis of the punch pin 101 with respect to the rack gear A103. And a rack gear B104 formed on the other side. The first rack gear 150 is fixed to the punch pin 101 by a screw 106 that is a fixing member. Further, the punching device 100 includes a spring 105 that functions as an urging member that urges the punch pin 101 in the axial direction and returns the punch pin 101 to the original state after the punch pin 101 is operated. Here, urging means a state where an elastic force is applied in a certain direction.

  Further, the punching device 100 includes a support portion 111 that supports the punch pins 101 and various drive mechanisms, and an upper chute 112 and a lower chute 113 that form a sheet conveyance path in the punch portion. The conveyed sheet is conveyed between the upper chute 112 and the lower chute 113 and punched by the punch pins 101.

  Further, the punching device 100 meshes with the gear 122 that transmits a driving force from a motor 121 that is a driving source of the punching device 100, a gear (not shown) fixed to a rotation shaft (not shown) of the motor 121. A disk 123 having a small gear fixed at substantially the center and rotated by following the gear 122, and a slider 127 configured to reciprocate only in the longitudinal direction by the rotation of the disk 123 are provided. A crankpin 124 is provided at a position eccentric to the axis of the disk 123. Further, the slider 127 has an arm 125 formed at one end of the slider 127 in a direction orthogonal to the reciprocating direction of the slider 127, and a groove 126 on which a crank pin 124 that rotates by the rotation of the disk 123 slides. Is formed. That is, the crank pin 124 slides in the groove 126 due to the rotation of the disk 123, and the slider 127 reciprocates in the longitudinal direction along with the rotation of the crank pin 124, whereby the rotational force from the motor 121 is reciprocated by the slider 127. Can be changed to Further, the slider 127 includes a first slider gear 128 that functions effectively when performing a first reciprocating motion that goes back in one direction of the slider 127, and a second that goes back in the other direction of the slider 127. And a second slider gear 129 that functions effectively when performing the reciprocating operation. In the first embodiment, the first rack gear 128 and the second slider gear 129 are collectively referred to as a second rack gear.

  In the first embodiment, a plurality of (four in the first embodiment) punch pins 101 are provided by crossing the axial direction of the punch pins 101 in the direction (longitudinal direction) in which the slider 127 operates. Four first slider gears 128 are provided in the longitudinal direction of the slider 127 for all operations. On the other hand, among the four punch pins 101, the second punch pin 101b and the third punch pin 101c (second punch pin group) are configured to perforate the paper by reciprocation using the other direction of the slider 127. Corresponding to the second punch pin 101b and the third punch pin 101c (second punch pin group), two second slider gears 129 are provided in the longitudinal direction of the slider 127.

Further, the punching device 100 includes a first pinion gear mechanism 130 that constitutes a first gear mechanism, and a second pinion gear mechanism 140 that constitutes a second gear mechanism. In the first embodiment, the gear conversion mechanism is a generic name of the first pinion gear mechanism 130 and the second pinion gear mechanism 140.
As shown in FIG. 3, the first pinion gear mechanism 130 includes a first sector pinion gear 131 that meshes with the first slider gear 128 of the second rack gear of the slider 127, with the shaft 130a as a common central axis. A second sector pinion gear 132 that meshes with the rack gear A103 of the first rack gear of the punch pin 101 is provided. Further, the first sector pinion gear 131 rotates integrally with the first sector pinion gear 131 and functions as one of transmission selection mechanisms that control the rotation of the second sector pinion gear 132. It has. The second sector pinion gear 132 is a notched sector gear, and functions as a floating gear that floats within a predetermined angle with the shaft 130a as a central axis. One of the floating angles (ranges) of the second sector pinion gear 132 is regulated by the protrusion 133. That is, by the clockwise rotation of FIG. 3 about the axis 130a of the first pinion gear mechanism 130, the second sector pinion gear 132 is pushed by the protrusion 133 and rotates (rotates) clockwise. . On the other hand, in the counterclockwise rotation in FIG. 3 of the first pinion gear mechanism 130, the first sector pinion gear 131 and the protrusion 133 rotate about the shaft 130a, but the second sector pinion gear 132 is The protrusion 133 is not pushed and rotates independently of the rotation of the first pinion gear mechanism 130 and functions as a floating gear.

  The second pinion gear mechanism 140 having a symmetrical position structure obtained by inverting the first pinion gear mechanism 130 meshes with the second slider gear 129 of the second rack gear of the slider 127 about the axis 140a. A first sector pinion gear 141 and a second sector pinion gear 142 that meshes with the rack gear B104 of the first rack gear of the punch pin 101 are provided. Further, the first sector pinion gear 141 rotates integrally with the first sector pinion gear 141 and functions as one of the transmission selection mechanisms that controls the rotation of the second sector pinion gear 142. It has. The second sector pinion gear 142 is a notched sector gear, and functions as a floating gear that floats within a predetermined angle with the shaft 140a as a central axis. One of the floating angles (ranges) of the second sector pinion gear 142 is regulated by the protrusion 143. That is, by the counterclockwise rotation of FIG. 3 about the axis 140a of the second pinion gear mechanism 140, the second sector pinion gear 142 is pushed by the protrusion 143 and rotates counterclockwise (rotation). To do). On the other hand, in the clockwise rotation of FIG. 3 of the second pinion gear mechanism 140, the first sector pinion gear 141 and the protrusion 143 rotate about the axis 140a, but the second sector pinion gear 142 protrudes. It is not pushed by the part 143, rotates independently of the rotation of the second pinion gear mechanism 140, and functions as a floating gear.

  The first pinion gear mechanism 130 and the second pinion gear mechanism 140 are both arranged in the second punch pin group. FIG. 3A shows a second punch pin 101b constituting the second punch pin group. FIG. 3B shows a partial cross section (cross section AA) of the second punch pin 101b. Since the movement of the slider 127 and the movement of the punch pin 101b intersect (orthogonal in the first embodiment), the first sector pinion gears 131 and 141 and the second sector pinion gears 132 and 142 have shafts 130a, Although it is coaxial with respect to 140a, it is not the same surface but is arranged in three dimensions. On the other hand, the second sector pinion gears 132 and 142 and the protrusions 133 and 143 have the same surface, and the rotation control by the protrusions 133 and 143 is possible.

(Function of punching device)
Next, the operation of the punching device 100 will be described.
FIGS. 4A and 4B are diagrams for explaining the movement of the perforating apparatus 100 from the basic posture (initial state) shown in FIGS. 2 and 3A. Here, FIG. 4A is used for explaining the first reciprocating motion, and FIG. 4B is used for explaining the second reciprocating motion.

First, the first reciprocating operation will be described.
In the transition from the initial state of FIG. 3A to the state of FIG. 4A, the punching device 100 receives the rotation of the motor 121, and the disk 123 moves in the E direction of FIG. Around). Due to the rotation of the disk 123 in the E direction, the crank pin 124 also rotates in the E direction. At the same time, the crank pin 124 slides in the groove 126 and moves the arm 125 in the F direction (right direction in the figure). As a result, the slider 127 moves in the F direction, which is one direction. The first slider gear 128 is also moved in the F direction by the movement of the slider 127 in the F direction, and the first pinion gear mechanism 130 meshed with the first slider gear 128 causes the first pinion gear mechanism 130 to move in the G direction ( Rotate clockwise. The protrusion 133 that is integral with the first sector pinion gear 131 also rotates in the G direction, transmits the rotational driving force to the second sector pinion gear 132, and the second sector pinion gear 132 rotates in the G direction. . The rotation of the second sector pinion gear 132 in the G direction causes the punch pins 101 (101a and 101b in FIG. 4A) to move in the H direction, so that a predetermined sheet of paper between the upper chute 112 and the lower chute 113 is predetermined. Perforate position.

  At this time, the second pinion gear mechanism 140 of the second punch pin 101b functions so as not to hinder the operation of the second punch pin 101b in the H direction. That is, the second slider gear 129 is also moved in the F direction by the movement of the slider 127 in the F direction, and the second pinion gear mechanism 140 is moved by the first fan-shaped pinion gear 141 meshed with the second slider gear 129. Rotate in the I direction (clockwise in FIG. 4). However, the second sector pinion gear 142 is not pushed by the protrusion 143 and does not rotate in the I direction. On the other hand, since the second sector pinion gear 142 meshes with the rack gear B104 and is a floating gear, the second punch pin 101b follows this movement without obstructing the movement in the H direction. Rotate in the direction (counterclockwise in the figure).

  In this embodiment, the forward movement from the state shown in FIG. 3A to the state shown in FIG. 4A and the return movement from the state shown in FIG. 4A to the state shown in FIG. A first reciprocating motion that goes back and forth is performed. In the “return” operation from the state of FIG. 4A to the state of FIG. 3A, the first slider gear is moved by the movement of the slider 127 in the direction opposite to the F direction (left direction in FIG. 4A). 128 and the second slider gear 129 move in the direction opposite to the F direction, causing the first sector pinion gears 131 and 141 to rotate in the direction opposite to the G direction (counterclockwise). The protrusions 133 and 143 are also rotated by this rotation, and the second sector pinion gears 132 and 142 released from the pressing of the protrusions 133 and 143 release the pressing of the punch pins 101a and 101b in the H direction. On the other hand, the spring 105 that has been contracted in the state of FIG. 4A urges the punch pins 101a and 101b in the direction opposite to the H direction by releasing the pressing of the second sector pinion gears 132 and 142, The punch pins 101a and 101b act to return to their original positions. The bias of the spring 105 raises the punch pins 101a and 101b, and the second sector pinion gear 132 meshed with the rack gear A103 rotates in the direction opposite to the G direction (counterclockwise) and meshes with the rack gear B104. The second sector pinion gear 142 that has been rotated rotates in the direction opposite to the J direction (clockwise). By the above, it can return to the initial state shown in FIG. 2 and FIG.

Next, the second reciprocating operation will be described.
In the transition from the initial state of FIG. 3A to the state of FIG. 4B, the punching device 100 receives the rotation of the motor 121 and the disk 123 moves in the K direction (the opposite direction of FIG. 4B). Rotate clockwise. As the disk 123 rotates in the K direction, the crank pin 124 also rotates in the K direction. At the same time, the crank pin 124 slides in the groove 126 and moves the arm 125 in the L direction (left direction in the figure). As a result, the slider 127 moves in the L direction, which is the other direction. As the slider 127 moves in the L direction, the first slider gear 128 also moves in the L direction, and the first sector pinion gear 131 meshed with the first slider gear 128 rotates in the M direction (counterclockwise in the figure). To do. The second sector pinion gear 132 is irrelevant to the rotation of the first sector pinion gear 131, and no driving force is transmitted. As a result, the first punch pin 101a urged upward by the spring 105 does not operate, and the first punch pin 101a remains in the upper standby position (the state shown in FIG. 3A). .

  On the other hand, the second pinion gear mechanism 140 meshed with the second punch pin 101b receives the movement of the second slider gear 129 that moves in the same manner as the slider 127 moves in the L direction, and the first sector pinion gear 141 receives the movement. The second pinion gear mechanism 140 rotates in the M direction (counterclockwise in the figure). The protrusion 143 that is integral with the first sector pinion gear 141 also rotates in the M direction, transmits the rotational driving force to the second sector pinion gear 142, and the second sector pinion gear 142 rotates in the M direction. . As the second fan pinion gear 142 rotates in the M direction, the second punch pin 101b moves in the N direction, and punches a predetermined position of the sheet between the upper chute 112 and the lower chute 113. At this time, the second sector pinion gear 132 of the first pinion gear mechanism 130 rotates in the O direction by the operation of the rack gear A103 of the second punch pin 101b in the N direction, but is merely interlocked. It is not an action that affects

  In addition, the punching device 100 is moved in the other direction by the movement from the state of FIG. 3A to the state of FIG. 4B and the operation of returning from the state of FIG. 4B to the state of FIG. A second reciprocating operation is performed to go back and return. In the “return” operation from the state of FIG. 4B to the state of FIG. 3A, the first slider gear is moved by the movement of the slider 127 in the direction opposite to the L direction (the right direction in FIG. 4B). 128 and the second slider gear 129 move in the direction opposite to the L direction, and the first sector pinion gears 131 and 141 and the protrusions 133 and 143 rotate in the direction opposite to the M direction (clockwise in the figure). . Thereby, first, the first punch pin 101a can return to the initial state shown in FIG.

  At the operating position of the second punch pin 101b, the second sector pinion gear 142 from which the pressing of the projecting portion 143 of the second pinion gear mechanism 140 is released releases the pressing of the second punch pin 101b in the N direction. On the other hand, the spring 105 which has been contracted in the state of FIG. 4B urges the second punch pin 101b in the direction opposite to the N direction by releasing the pressing of the second sector pinion gear 142, The second punch pin 101b acts to return to its original position. The second punch pin 101b is lifted by the urging of the spring 105, and the second sector pinion gear 132 meshed with the rack gear A103 of the first rack gear rotates in the direction opposite to the O direction (counterclockwise). Then, the second sector pinion gear 142 meshed with the rack gear B104 rotates in the direction opposite to the M direction (clockwise). Thus, the second punch pin 101b can return to the initial state shown in FIG.

Next, the movement of the four punch pins 101 (101a to 101d) will be described with reference to FIGS.
FIGS. 5A and 5B are diagrams for explaining the first reciprocating operation that goes back in one direction. In the initial state shown in FIG. 5A, the four punch pins 101 (101a to 101d) are urged by the spring 105 and are all in the raised standby position, and the sheet is placed between the upper chute 112 and the lower chute 113. It can be transported.

  After that, when the slider 127 moves in the F direction (the right direction in FIG. 5B) as the first reciprocating motion, the first slider gear 128 also moves in the F direction as shown in FIG. 5B. The first pinion gear mechanism 130 that moves and meshes with the four punch pins 101 (101a to 101d) rotates in the G direction. The four punch pins 101 (101a to 101d) all move in the H direction by the rack gear A103 of the first rack gear meshing with the first pinion gear mechanism 130. As a result, all four portions of the paper are punched.

Thereafter, on the return of the first reciprocating operation, the slider 127 moves in the direction opposite to the F direction. As a result, the pressing in the H direction by the first pinion gear mechanism 130 is released, and the four punch pins 101 (101a to 101d) are urged by the spring 105 to return to the standby position in FIG.
In this way, the first reciprocating operation that goes back in one direction makes it possible to operate all four punch pins 101 (101a to 101d), and can simultaneously punch four locations on the paper.

  FIGS. 6A and 6B are diagrams for explaining the second reciprocating operation that returns in the other direction. In the initial state shown in FIG. 6A, the four punch pins 101 (101 a to 101 d) are all urged by the spring 105 and are in the raised standby position, and the sheet is placed between the upper chute 112 and the lower chute 113. It can be transported.

  Thereafter, as the second reciprocating motion, when the slider 127 moves in the L direction (leftward in FIG. 6B), the second slider gear 129 also moves in the L direction as shown in FIG. 6B. The second pinion gear mechanism 140 that moves and meshes with the second punch pin 101b and the third punch pin 101c, which are the second punch pin group, rotates in the M direction. By the rack gear B104 of the first rack gear meshing with the second pinion gear mechanism 140, the second punch pin 101b and the third punch pin 101c operate in the N direction. This punches two places on the center side of the paper.

Thereafter, on the return of the second reciprocating operation, the slider 127 moves in the direction opposite to the L direction (the right direction in FIG. 6B). As a result, the pressing in the N direction by the second pinion gear mechanism 140 is released, and the second punch pin 101b and the third punch pin 101c are urged by the spring 105 to return to the standby position in FIG.
In this way, the second reciprocating operation that goes back in one direction makes it possible to operate the second punch pin 101b and the third punch pin 101c, which are the second punch pin group. Can be perforated.

[Embodiment 2]
In the second embodiment, instead of the configuration using the gear mechanism (the first pinion gear mechanism 130 and the second pinion gear mechanism 140) of the first embodiment, the toothless pinion gear (the first toothless pinion gear 210 and the first pinion gear mechanism 2 relates to a drilling device 100 using two toothless pinion gears 220). In addition, the same code | symbol is used about the function similar to Embodiment 1, and the detailed description is abbreviate | omitted here.

(Configuration of punching device)
7-9 is explanatory drawing which showed the structure of the punching apparatus 100 with which Embodiment 2 is applied. 7 is a perspective view of the punching device 100, FIGS. 8A to 8C are explanatory diagrams showing the configuration of the punching device 100, and FIGS. 9A, 9B, 10A, and 10B. FIG. 6 is a diagram for explaining the operation of the perforating apparatus 100.

  As shown in FIG. 7 and FIGS. 8A to 8C, the punching device 100 of the second embodiment is similar to the first embodiment in that a plurality (four in this embodiment) of punch pins 101 (first Punch pin 101a, second punch pin 101b, third punch pin 101c, and fourth punch pin 101d). Similarly, the first punch pin 101a and the fourth punch pin 101d form the first punch pin group. The second punch pin 101b and the third punch pin 101c constitute a second punch pin group. 7 and 8 (a) to 8 (c), a slider 127 is provided as in the first embodiment. Here, description of the drive source described in FIG. 3 and FIG. 4 is omitted, but in order to slide the slider 127, functions similar to those in the first embodiment (motor 121, gear 122, disk 123, The crankpin 124, the arm 125, and the groove 126) are all provided.

  In the second embodiment, a first toothless pinion gear 210 is provided corresponding to the position of the first punch pin group (first punch pin 101a and fourth punch pin 101d), and the second punch pin group (first Corresponding to the positions of the second punch pin 101b and the third punch pin 101c), a second toothless pinion gear 220 is provided. In the second embodiment, the gear conversion mechanism is a generic term for the first toothless pinion gear 210 and the second toothless pinion gear 220.

FIG. 8B details the mechanism for operating the first punch pin group, and FIG. 8C details the mechanism for operating the second punch pin group.
As shown in FIG. 8B, the slider 127 controls (determines the stationary position of the first slider gear 201 that is engaged with and driven by the first toothless pinion gear 210 and the first toothless pinion gear 210. ) And a round-up portion 203 that controls the start of rotation of the first toothless pinion gear 210. In conjunction with the movement of the slider 127 in the P direction and Q direction, the first slider gear 201, the flat protrusion 202, and the round-up portion 203 also move in the P direction and the Q direction.

  The first toothless pinion gear 210 includes a first pinion gear train 211 that meshes with the first slider gear 201 of the slider 127, and a first punch pin group (first punch pin 101a and fourth punch pin 101d). And a second pinion gear train 212 that meshes with the rack gear A103 of the first rack gear that is attached by screws 106. Between the first pinion gear train 211 and the second pinion gear train 212, a tooth missing portion 213 from which the gear train is removed by a predetermined range is provided. Further, the first toothless pinion gear 210 is provided with a lever 215 that starts to rotate around the shaft 210a of the first toothless pinion gear 210 when pushed by the round-up portion 203 of the slider 127. ing. The first pinion gear train 211, the second pinion gear train 212, the tooth missing portion 213, and the lever 215 of the first tooth missing pinion gear 210 rotate integrally around the shaft 210a.

  In the second embodiment shown in FIG. 8, the spring 105 shown in the first embodiment is not provided. This is because the front end portion 211a of the first pinion gear train 211 shown in FIG. 8B abuts on the flat protrusion 202, so that the first punch pin group (first punch pin 101a and fourth punch pin 101d). This is because each of the punch pins 101 prevents lowering due to its own weight. Thereby, even if the spring 105 is not particularly provided, the punch pin 101 does not fall (move) downward due to its own weight.

  Further, as shown in FIG. 8C, the slider 127 controls the stationary position of the second slider gear 205 that is engaged with and driven by the second toothless pinion gear 220 and the second toothless pinion gear 220. A flat projecting portion 206 to be (determined) and a rounding-up portion 207 for controlling the start of rotation of the second toothless pinion gear 220 are provided. In conjunction with the movement of the slider 127 in the P direction and the Q direction, the second slider gear 205, the flat protrusion 206, and the round-up part 207 also move in the P direction and the Q direction.

  The second toothless pinion gear 220 includes a first pinion gear train 221 that meshes with the second slider gear 205 of the slider 127, and a second punch pin group (second punch pin 101b and third punch pin 101c). And a second pinion gear train 222 that meshes with the rack gear B104 of the first rack gear that is attached by screws 106. Further, between the first pinion gear train 221 and the second pinion gear train 222, a tooth missing portion 223 from which the gear train is removed by a predetermined range is provided. Further, the second toothless pinion gear 220 is provided with a lever 225 that starts to rotate about the shaft 220a of the second toothless pinion gear 220 as a central axis when pushed by the round-up portion 207 of the slider 127. ing. The first pinion gear train 221, the second pinion gear train 222, the tooth missing portion 223, and the lever 225 of the second tooth missing pinion gear 220 rotate integrally around the shaft 220a.

The punching apparatus 100 to which the second embodiment is applied has the above-described structure, but the first punch pin group (the first punch pin 101a and the fourth punch pin shown in FIG. 8B). The structure for driving 101d) and the structure for driving the second punch pin group (second punch pin 101b and third punch pin 101c) shown in FIG. 8C are substantially bilaterally symmetric. As a result, a drilling operation as described later can be realized.
In addition, when the front-end | tip part 221a of the 1st pinion gear train 221 shown in FIG.8 (c) contact | abuts to the flat protrusion part 206, the 2nd punch pin group (2nd punch pin 101b and 3rd punch pin 101c). Each punch pin 101 is prevented from being lowered by its own weight, and the initial state can be maintained.
In the second embodiment, the first rack gear 201 and the second slider gear 205 are collectively referred to as a second rack gear.

(Function of punching device)
Next, the operation of the perforating apparatus 100 according to the second embodiment will be described with reference to FIGS. 9 (a) and 9 (b) and FIGS. 10 (a) and 10 (b). FIGS. 9A and 9B are explanatory diagrams of the first reciprocating operation in which the slider 127 returns in one direction, FIG. 9A is an explanatory diagram of the initial state (the initial and return states), and FIG. (B) is an explanatory diagram of a forward state. In the initial state shown in FIG. 9A, the four punch pins 101 (101a to 101d) are all in the raised standby position, and the sheet can be conveyed between the upper chute 112 and the lower chute 113. The tip 211a of the first toothless pinion gear 210 and the tip 221a of the second toothless pinion gear 220 correspond to the flat protrusions 202 and 206 (see FIGS. 8B and 8C), respectively. The raised position of the punch pins 101 (101a to 101d) is maintained by contact.

  After that, when the slider 127 moves in the P direction (the right direction in FIG. 9B) as the first reciprocating motion, as shown in FIG. 9B, the first slider gear 201 also moves in the P direction. The round-up unit 203 (see FIG. 8B) also moves in the P direction. Then, the lever 215 is pushed by the round-up portion 203, and the first toothless pinion gear 210 meshed with the first slider gear 201 rotates in the R1 direction. The first punch pin group (the first punch pin 101a and the fourth punch pin 101d) in which the rack gear A103 of the first rack gear meshes with the first toothless pinion gear 210 operates in the S1 direction. . As a result, the punching process is performed on two places of the sheet. At this time, the tip 221a of the second toothless pinion gear 220 is in contact with the flat protrusion 206 (see FIG. 8C), and the second punch pin group (the second punch pin 101b and the third punch pin). 101c) is not lowered and the raised position is maintained.

  Then, on the return of the first reciprocating operation, the slider 127 moves in the direction opposite to the P direction. As a result, the first toothless pinion gear 210 rotates reversely (rotates in the direction R2 in FIG. 8B), and the first punch pin group (the first punch pin 101a and the fourth punch pin 101d) returns to its original state. . As a result, the state shown in FIG.

  Next, the second reciprocating motion returning in the other direction will be described with reference to FIGS. 10 (a) and 10 (b). FIGS. 10A and 10B show a second reciprocating operation in which the slider 127 moves back in the other direction. FIG. 10A shows an initial state (initial and return states), and FIG. ) Shows the state of going. In the initial state shown in FIG. 10A, the four punch pins 101 (101a to 101d) are all in the raised standby position, and the sheet can be conveyed between the upper chute 112 and the lower chute 113. The tip 211a of the first toothless pinion gear 210 and the tip 221a of the second toothless pinion gear 220 correspond to the flat protrusions 202 and 206 (see FIGS. 8B and 8C), respectively. The raised position of the punch pins 101 (101a to 101d) is maintained by contact.

  Thereafter, as the second reciprocating motion, when the slider 127 moves in the Q direction (leftward in FIG. 10B), the second slider gear 205 also moves in the Q direction as shown in FIG. 10B. The rounding unit 207 (see FIG. 8C) also moves in the Q direction. Then, the lever 225 is pushed by the round-up part 205, and the second toothless pinion gear 220 meshed with the second slider gear 205 rotates in the T1 direction. The second punch pin group (the second punch pin 101b and the third punch pin 101c) in which the rack gear B104 of the first rack gear meshes with the second toothless pinion gear 220 operates in the U1 direction. . As a result, the punching process is performed on two places of the sheet. At this time, the tip 211a of the first toothless pinion gear 210 is in contact with the flat protrusion 202 (see FIG. 8B), and the first punch pin group (the first punch pin 101a and the fourth punch pin). 101d) is not lowered and the raised position is maintained.

  Then, on the return of the second reciprocating operation, the slider 127 moves in the direction opposite to the Q direction. As a result, the second toothless pinion gear 220 rotates in the reverse direction (rotates in the direction T2 in FIG. 8C), and the second punch pin group (the second punch pin 101b and the third punch pin 101c) returns to its original state. . As a result, the state shown in FIG.

In the second embodiment, the first reciprocating operation returning to one direction of the slider 127 shown in FIGS. 9A and 9B and the other direction of the slider 127 shown in FIGS. 10A and 10B. By repeating the second reciprocating operation that goes back and forth, it becomes possible to perforate the paper at four locations. As described above, the second embodiment has the same functions (motor 121, gear 122, disk 123, crank pin 124, arm 125, groove 126) as the first embodiment in order to slide the slider 127. ing. As shown in FIGS. 4A and 4B, the four holes can be drilled by reversing the motor 121 every 180 degrees, for example, by rotating the motor 121 once. Can also be done.
When punching only two places instead of four places on the sheet, it is sufficient to repeat only the reversal of the motor 121 and repeat one direction of the slider 127 or the other direction.

[Embodiment 3]
In the third embodiment, the drilling device 100 is mainly configured by combining the structure of the first embodiment and the structure of the second embodiment.
FIG. 11 is a configuration diagram illustrating the punching device 100 according to the third embodiment. In the third embodiment, the first punch pin group (first punch pin 101a and fourth punch pin 101d) is provided with a first toothless pinion gear 210, and the second punch pin group (second punch pin 101). 101b and the third punch pin 101c) are provided with a first pinion gear mechanism 130 and a second pinion gear mechanism 140. In the third embodiment, the second punch pin group (second punch pin 101b and third punch pin 101c) is not provided with the spring 105 (see FIG. 3A) of the first embodiment. Instead, a spring 139 for urging the first sector pinion gear 131 and the second sector pinion gear 132 of the first pinion gear mechanism 130, and the first sector pinion gear 141 of the second pinion gear mechanism 140 and the first A spring 149 that biases the two sector pinion gears 142 is provided. Although not shown, the mechanism for sliding the slider 127 has the same functions as the first embodiment (motor 121, gear 122, disk 123, crank pin 124, arm 125, groove 126). ing.

In the first reciprocating operation returning in one direction (F direction) of the slider 127, the first punch pin group (first punch pin 101a and fourth punch pin 101d) and the second punch pin group (second punch pin). 101b and the third punch pin 101c) are operated, and the four punch pins 101 (101a to 101d) all perform the punching operation of the paper.
On the other hand, in the second reciprocating operation returning in the other direction (L direction) of the slider 127, the second punch pin group (the second punch pin 101b and the third punch pin 101c) is operated, and the first punch pin group is operated. (The first punch pin 101a and the fourth punch pin 101d) do not operate. That is, two punching operations are performed by the second punch pin group (the second punch pin 101b and the third punch pin 101c).
As described above, according to the third embodiment, the punch 127 performs the punching operation in the punch pin group by performing the reciprocating operation in one direction (F direction) of the slider 127 and the reciprocating operation in the other direction (L direction). 101 can be switched.

The above-described embodiments have been illustrated for the purpose of explanation, and the present invention is not limited thereto. The present invention can be recognized by those skilled in the art from the description of the claims, the specification, and the drawings. Modifications, deletions, and additions are possible as long as they are not contrary to the technical idea of the above.
For example, in the above-described embodiment, the punching device using four punch pins is shown, but the number is not limited to four, and may be two or six. Furthermore, it may be an odd number such as 3, 5, etc. instead of an even number.
In the above-described embodiment, the first rack gear 150 (the left rack gear A103 and the right rack gear B104) is fixed to the punch pin 101 with the screws 106. However, the present invention is not limited to this. Instead, the first rack gear 150 may be formed directly on the punch pin 101 by machining or the like.

  In the above-described embodiment, the paper processing device includes the transport device 10, the first post-processing device 30, and the second post-processing device 50. However, Japanese Patent Laid-Open No. 2008-94612 is disclosed. As in the paper processing apparatus (post-processing apparatus) described in Japanese Patent Application Laid-Open No. 2008-001518, the first post-processing apparatus 30 directly receives the paper discharged from the image forming apparatus and enters the paper transport path. A paper processing apparatus of a type in which the punching apparatus 100 is installed may be used.

1 is a diagram illustrating an overall configuration of an image forming system to which the present embodiment (Embodiment 1) is applied. It is a perspective view of the perforation apparatus with which this Embodiment is applied. (A), (b) is explanatory drawing which showed the structure of the punching apparatus containing a motor. (A), (b) is explanatory drawing for demonstrating the characteristic motion of a perforation apparatus. (A), (b) is explanatory drawing for demonstrating the characteristic motion of a perforation apparatus. (A), (b) is a figure for demonstrating the raising / lowering operation | movement of this stacker tray. It is a perspective view of the perforation apparatus with which this Embodiment 2 is applied. (A)-(c) is explanatory drawing which showed the structure of the perforation apparatus with which Embodiment 2 is applied. (A), (b) is a figure for demonstrating the effect | action of the perforation apparatus with which Embodiment 2 is applied. (A), (b) is a figure for demonstrating the effect | action of the perforation apparatus with which Embodiment 2 is applied. FIG. 6 is a configuration diagram showing a perforation apparatus according to a third embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Image forming system, 2 ... Image forming apparatus, 3 ... Paper processing apparatus, 10 ... Conveying apparatus, 100 ... Punching device, 101 ... Punch pin, 101a ... 1st punch pin, 101b ... 2nd punch pin, 101c ... 3rd Punch pin, 101d ... fourth punch pin, 127 ... slider, 130 ... first pinion gear mechanism, 140 ... second pinion gear mechanism, 210 ... first toothless pinion gear, 220 ... second toothless pinion gear

Claims (9)

A punch pin having a first rack gear and forming a hole in the paper by moving in the axial direction;
A slider having a second rack gear and reciprocating in a direction intersecting the direction of movement of the punch pin in response to a driving force from a driving source;
It has a sector pinion gear and / or a toothless pinion gear, and meshes with the second rack gear of the slider and the first rack gear of the punch pin to convert the reciprocating motion of the slider into the moving motion of the punch pin. A paper punching device comprising a gear conversion mechanism. The slider performs a reciprocating motion using one direction and a reciprocating motion using the other direction,
The gear conversion mechanism moves the punch pin when the slider reciprocates using the one direction, and does not move the punch pin when the slider reciprocates using the other direction. The paper punching device according to claim 1, wherein The gear conversion mechanism includes a first sector pinion gear that meshes with the second rack gear of the slider, and a second sector pinion gear that meshes with the first rack gear of the punch pin,
The paper punching device according to claim 2, wherein the second sector pinion gear is partially allowed to rotate with respect to the first sector pinion gear. A plurality of the punch pins are arranged in a direction in which the slider reciprocates,
At least any one of the plurality of punch pins has a rack gear A on one side sandwiching the axis of the punch pin, and a rack gear B on the other side sandwiching the axis.
The first gear conversion mechanism constituting the gear conversion mechanism is opposed to the rack gear A of the punch pin, and the second gear conversion mechanism in which the first gear conversion mechanism is reversed is the rack gear B of the punch pin. The sheet punching device according to claim 1, wherein the sheet punching device is opposed to the sheet punching device.   2. The gear conversion mechanism according to claim 1, wherein when the slider reciprocates in the other direction, the tooth pinion portion of the tooth pinion gear faces the slider so as not to move the punch pin. The paper punching apparatus according to 2. A slider having a second rack gear and performing a first reciprocating motion returning in one direction upon receiving a driving force from a driving source and a second reciprocating motion returning in the other direction;
A group of punch pins having a first rack gear and arranging a plurality of punch pins that form holes in the paper by moving in the axial direction so that the axis direction intersects the direction in which the slider operates;
The slider engages with the second rack gear of the slider and the first rack gear of the punch pin, operates the punch pin by the first reciprocating operation of the slider, and does not operate the punch pin by the second reciprocating operation. A first gear mechanism;
The slider is engaged with the second rack gear of the slider and the first rack gear of the punch pin, the punch pin is operated by the second reciprocation of the slider, and the punch pin is not operated by the first reciprocation. A second gear mechanism,
A sheet punching device, wherein the punch pin constituting the punch pin group engages the first gear mechanism and / or the second gear mechanism. Only the first gear mechanism is meshed with the punch pins constituting the first punch pin group in the punch pin group,
Only the second gear mechanism, or both the first gear mechanism and the second gear mechanism are meshed with the punch pins constituting the second punch pin group in the punch pin group. The paper punching device according to claim 6. The first gear mechanism is meshed with one side of the punch pin constituting the second punch pin group, and the second gear mechanism is meshed with the other side of the punch pin. ,
8. The sheet according to claim 7, wherein the punch pins constituting the second punch pin group are operated by both the first reciprocating operation and the second reciprocating operation of the slider. Drilling device. An image forming apparatus for forming an image on paper;
A paper punching device that punches holes at predetermined positions of the paper output from the image forming apparatus,
The paper punching device is:
A slider having a second rack gear and performing a first reciprocating motion returning in one direction upon receiving a driving force from a driving source and a second reciprocating motion returning in the other direction;
A group of punch pins having a first rack gear and arranging a plurality of punch pins that form holes in the paper by moving in the axial direction so that the axis direction intersects the direction in which the slider operates;
The slider engages with the second rack gear of the slider and the first rack gear of the punch pin, operates the punch pin by the first reciprocating operation of the slider, and operates the punch pin by the second reciprocating operation. A first gear mechanism that is not allowed;
The slider engages with the second rack gear of the slider and the first rack gear of the punch pin, operates the punch pin by the second reciprocating operation of the slider, and operates the punch pin by the first reciprocating operation. A second gear mechanism that is not allowed to
Only the first gear mechanism is meshed with the punch pins constituting the predetermined punch pin group in the punch pin group,
Only the second gear mechanism or both the first gear mechanism and the second gear mechanism are meshed with punch pins constituting the punch pin group other than the predetermined punch pin group in the punch pin group. An image forming system.

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