JP2019130754A - Binding device, sheet processing device and image formation device - Google Patents

Abstract

To provide a binding device that restricts hitching of a binding needle 79 when a sheet bundle is taken out of an insertion part 51.SOLUTION: The sheet binding device includes: the insertion part 51 into which a sheet bundle is inserted; and a driving machine 58 that drives the binding needle 79 into the sheet bundle inserted into the insertion part 51. The sheet bundle is bound by driving of the binding needle 79. At least either one of a first wall 65a and a second wall 66a of the insertion part 51 that are facing each other is dented. When a sheet bundle is taken out of the insertion part 51, by passing the protruding part out of the sheet bundle surface at the binding needle 79 through the dent, hitching of the binding needle 79 against the first wall 65a or the second wall 66a can be restricted.SELECTED DRAWING: Figure 24

Description

  The present invention relates to a binding device, a sheet processing device, and an image forming apparatus.

  2. Description of the Related Art Conventionally, a binding device that includes an insertion portion that inserts a sheet bundle composed of a plurality of sheets and a driving machine that drives a binding needle into the sheet bundle inserted into the insertion portion, and binds the sheet bundle by driving the binding needle. It has been known.

  For example, Patent Literature 1 describes an electric stapler as a binding device that includes an insertion space as an insertion portion into which a sheet bundle is inserted, and a driving machine including an electrically driven push blade or the like.

  In this way, in the configuration in which the binding needle is driven by the driving machine with respect to the sheet bundle inserted into the insertion portion such as the insertion space, when the sheet bundle into which the binding needle has been driven is taken out from the insertion portion, the following is performed. Sometimes caused a malfunction. That is, there is a problem that the sheet bundle cannot be taken out from the insertion portion due to the binding of the binding needle of the sheet bundle, or the sheet is torn forcibly.

In order to solve the above-described problem, the present invention comprises an insertion portion for inserting a sheet bundle, and a driving machine for driving a binding needle into the sheet bundle inserted into the insertion portion, and driving the binding needle. In the binding device for binding the sheet bundle,
A recess is provided in at least one of the first wall and the second wall of the insertion portion facing each other in the sheet bundle thickness direction.

  According to the present invention, there is an excellent effect that the binding needle can be prevented from being caught when the sheet bundle is taken out from the insertion portion.

FIG. 2 is a perspective view showing an appearance of the copying machine according to the embodiment from the front side. The perspective view which shows the sheet | seat bundle inserted in the insertion part of the binding apparatus of the copying machine in order to bind a corner with the binding apparatus. The perspective view which shows the sheet | seat bundle inserted in the insertion part in order to bind the back cover side with the binding device. FIG. 2 is a configuration diagram showing an internal configuration of a printer of the copier from the right side of the copier. FIG. 2 is a perspective view showing the external appearance of the copying machine with the binding device removed from the front side. The perspective view which shows the same binding apparatus of the state removed from the printer. The perspective view for demonstrating the main body removal | desorption of the binding device. The fragmentary sectional view which shows the base part of the holding body of the binding apparatus, and the main body of the binding apparatus slidably moved on the base part for attachment to the holding body. The fragmentary sectional view which shows the same base part in the state with which the base part and the normal mounting position of the holding body were mounted | worn. The rear view which shows the same holding body. FIG. 3 is a front view showing the holding body attached to a right side exterior cover of the printer. The front view which shows the same holding body of the state which removed the external thread from the flame | frame of the printer. The front view for demonstrating the state of the holding body when the right side surface exterior cover is removed from the main body of the printer. FIG. 3 is a front view showing a middle stage of the mounting operation of the main body with respect to the holding body fixed to the printer. FIG. 3 is a front view showing the main body in a state where a mounting operation on the holding body fixed to the printer is finished. The perspective view which shows the same main body removed from the holding body from the back side. The block diagram which shows the principal part of the electric circuit of the printer and the binding apparatus. The perspective view which shows the same main body of the state which removed the upper cover. The fragmentary sectional view which shows the sheet | seat bundle in which the staple was driven, and the circumference | surroundings of the insertion part of the main body. The fragmentary sectional view which shows the main body of the binding device which is not applying this invention The fragmentary perspective view which shows the insertion part of the binding device which concerns on embodiment, and this periphery. The fragmentary sectional view which shows the sheet | seat bundle pulled out from the same insertion part of the binding device. FIG. 3 is a side view showing the plug-in portion when viewed from the front of the copier at an oblique angle of 45 °. The side view which shows the insertion part of the modification which looked at the viewpoint shifted from the front of the copier by 45 degrees diagonally. The plane schematic diagram for demonstrating the 1st example of the insertion / extraction of the sheet bundle with respect to the insertion part. The plane schematic diagram for demonstrating the 2nd example of insertion / extraction of the sheet bundle with respect to the insertion part. The perspective view which shows the same main body.

A copier as an image forming apparatus to which the present invention is applied will be described below.
First, a basic configuration of the copying machine according to the embodiment will be described. FIG. 1 is a perspective view showing an external appearance of a copying machine 100 according to an embodiment from the front side. The copying machine 100 includes a printer 30 that plays a role of forming an image on a recording sheet, an operation panel 35 including a touch panel, a binding device 80, and a scanner 90 that reads an image of a document using a known optical system. I have.

  The scanner 90 includes a reading unit 95 equipped with a reading optical system, and an automatic document conveying device (hereinafter referred to as ADF) 99 that automatically conveys original sheets one by one to a reading position by an image reading element of the reading unit 95. ing. The ADF 99 is fixed to the reading unit 95 with a hinge so as to open and close with respect to the reading unit 95.

  When the operator manually scans the document by the scanner 90, the operator opens the ADF 99 with respect to the reading unit 95 and places the document on the contact glass fixed at the upper surface position of the reading unit 95. Thereafter, after the ADF 99 is closed, a manual reading command is issued to the scanner 90 by a touch operation on the operation panel 35. Then, the traveling optical system mounted under the contact glass in the reading unit 95 travels and reads the image on the document surface while scanning the document surface of the document. Image data obtained by reading is sent to the printer 30. The printer forms an image on the recording sheet based on the image data. As a result, the document is copied.

  In addition, when the operator reads the images of a plurality of document sheets automatically by the scanner 90, the operator sets the document sheets on the document tray of the ADF 99 in a state of being overlapped. Thereafter, an automatic reading command is issued to the scanner 90 by a touch operation on the operation panel 35. Then, the ADF 99 sequentially passes the original sheets one by one above the reading position by the image reading element of the reading unit 95, and causes the image reading element to read the image of the original sheet. As the image reading element, an element for reading an image on the first side of an original sheet and an element for reading an image on the second side are provided. For this reason, it is possible to read images on both sides of the original sheet with one pass.

  An arrow A in FIG. 1 indicates a pulling direction from the main body of the paper feed cassette 10 mounted on the printer 30.

  The binding device 80 has a slit-like insertion part. When a bundle of recording sheets manually inserted into the insertion portion by an operator is detected by a manual detection sensor, an electric stapler serving as a binding unit is driven to staple a bundle of recording sheets P (hereinafter referred to as a sheet bundle). ). In this way, the sheet bundle is bound.

  FIG. 2 is a perspective view showing the sheet bundle inserted into the insertion portion of the binding device 80 for binding corners together with the binding device 80. When binding a corner of a sheet bundle, the corner portion of the sheet bundle is inserted into a slit-like insertion portion of the binding device 80 as illustrated.

  FIG. 3 is a perspective view showing the sheet bundle inserted into the insertion portion of the binding device 80 in order to bind the back cover side together with the binding device 80. When binding the back cover side of the sheet bundle, the end part of the back cover side of the sheet bundle is inserted into the slit-like insertion portion of the binding device 80 as shown in the figure. By repeating this insertion while shifting the insertion portion along the longitudinal direction of the sheet, it is possible to bind the end portion on the spine cover side at a plurality of locations.

  FIG. 4 is a configuration diagram showing the internal configuration of the printer 30 from the right side of the copying machine 100. An arrow A in the figure also indicates a pulling direction from the main body of the paper feed cassette 10 mounted on the printer 30.

  In the figure, a printer 30 includes a drum-shaped photoreceptor 1 as a latent image carrier, a developing device 3 as a developing means, a charging device 4 as a charging means, a transfer roller 5 as a transferring means, an optical writing device 6, and a toner cartridge 7. , A paper feed roller 8, a resist roller pair 9, and the like. Also provided are a paper feed cassette 10, a fixing device 11, a paper discharge roller pair 12, a drum cleaning device 13, a static elimination lamp 14, and the like.

  The photoreceptor 1 is driven to rotate in the counterclockwise direction in FIG. In the charging device 4, a charging roller to which a charging bias is applied is brought into contact with or close to the surface of the photoreceptor 1. By generating a discharge between the charging roller and the photoreceptor 1, the surface of the photoreceptor 1 is charged. As a result, of the entire area in the circumferential direction of the surface of the photoconductor 1, the area that has passed through the position facing the charging roller as a result of rotational driving is uniformly charged to, for example, a negative high voltage (for example, −700 V). To do.

  The optical writing device 6 optically scans the surface of the uniformly charged photoreceptor 1 by a known laser optical system. Of the entire area on the surface of the photoreceptor 1, the portion irradiated with light by the above-described optical scanning attenuates the potential. As a result, an electrostatic latent image having a lower potential (for example, −50 V) than the background portion (a portion that is uniformly charged) is formed on the surface of the photoreceptor 1.

  The electrostatic latent image passes through a position facing the developing device 3 as the photosensitive member 1 is rotated. In the developing device 3, a developing sleeve 3 a as a developing member is opposed to the photoreceptor 1. The developing sleeve 3a carries a developer containing toner and a magnetic carrier, and brings the developer into contact with the surface of the photosensitive member 1 in accordance with the rotation of the developing sleeve 3a. A developing bias having the same polarity (negative polarity in this example) as the background portion potential or electrostatic latent image potential of the photosensitive member 1 is applied to the developing sleeve 3a.

  The absolute value of the developing bias is smaller than the absolute value of the background portion potential and larger than the electrostatic latent image potential. For this reason, a developing potential for electrostatically moving negatively charged toner from the sleeve side to the photosensitive member side acts between the developing sleeve 3a and the electrostatic latent image on the photosensitive member 1. Further, a ground potential that electrostatically moves the negatively charged toner from the photosensitive member side to the sleeve side acts between the developing sleeve 3 a and the background portion of the photosensitive member 1. By these actions, the toner on the developing sleeve 3a selectively adheres to the electrostatic latent image on the photoreceptor 1. As a result, the electrostatic latent image is developed into a toner image.

  The developer on the developing sleeve 3a passes through a position facing the photoreceptor 1 as the developing sleeve 3a is driven to rotate, contributes to the development of the electrostatic latent image, and then returns to the inside of the developing device 3. The toner density is detected by the toner density sensor of the developing device 3. When the detection result is lower than the target toner concentration, the toner cartridge 7 is driven and the toner in the toner cartridge is replenished into the developing device 3.

  The transfer roller 5 is rotationally driven in the clockwise direction in the drawing while being in contact with the photoreceptor 1 and forming a transfer nip. The transfer roller 5 is applied with a transfer bias having a polarity (positive in this example) opposite to the charge polarity of the toner, the background portion of the photoreceptor 1, and the electrostatic latent image.

  The paper feed cassette 10 stores a plurality of recording sheets P in a stacked state. Among these recording sheets P, the paper feeding roller 8 is pressed against the uppermost recording sheet P. The uppermost recording sheet P is sent out from the paper feed cassette 10 by rotating the paper feed roller 8 at a predetermined timing. At the timing when the leading edge of the recording sheet P hits the registration nip of the registration roller pair 9, the rotational driving of the paper supply roller 8 is temporarily stopped.

  Thereafter, the registration roller pair 9 and the paper feeding roller 8 start to rotate at a timing at which the recording sheet P is synchronized with the toner image on the photoconductor 1 at the transfer nip. By this start, the toner image on the photoreceptor 1 is transferred to the surface of the recording sheet P passing through the transfer nip by the action of the transfer electric field formed by applying the nip pressure or the transfer bias.

  The transfer residual toner that has not been transferred to the recording sheet P is slightly adhered to the surface of the photoreceptor 1 that has passed through the transfer nip. This transfer residual toner is removed from the surface of the photoreceptor 1 by the drum cleaning device 13.

  When the surface of the photosensitive member 1 that has been subjected to the cleaning process by the drum cleaning device 13 passes through a position facing the neutralizing lamp 14 by the rotational driving of the photosensitive member 1, residual charges are eliminated. The surface of the photoreceptor 1 initialized by this charge removal is then uniformly charged again by the charging device 4.

  The recording sheet P that has passed through the transfer nip is sent to the fixing device 11. The fixing device 11 forms a fixing nip by contact between a fixing roller 11a including a heat source such as a halogen lamp and a pressure roller 11b pressed toward the fixing roller 11a. When the recording sheet P sent to the fixing device 11 passes through the fixing nip, the toner image is fixed on the surface by the action of the nip pressure or the pressure by the fixing roller 11a.

  After passing through the fixing device 11, the recording sheet P passes through the paper discharge nip of the paper discharge roller pair 12, and then on the stack portion 29 formed on the upper surface of the casing of the printer 30 as indicated by an arrow R in the figure. Stacked.

  In the copying machine 100 having the above-described basic configuration, a recording sheet is provided by a sheet feeding roller 8, a registration roller pair 9, a photoconductor 1, a transfer roller 5, a fixing device 11, a paper discharge roller pair 12, a conveyance guide member, and the like. Conveying means for conveying P along the conveying path is configured. The conveyance path is a path that sequentially passes through a registration nip, a transfer nip, a fixing nip, and a paper discharge nip from a contact position between the sheet feeding roller 8 and the recording sheet P in the sheet feeding cassette 10.

  In the copying machine 100, the printer 30 functions as a recording unit that is a processing unit that performs an image recording process on the recording sheet P.

Next, a characteristic configuration of the copying machine 100 will be described.
FIG. 5 is a perspective view showing the appearance of the copying machine 100 with the binding device removed from the front side. Comparing FIG. 1 with FIG. 5, it can be seen that the binding device 80 fixed to the right side exterior cover 28 of the printer 30 can be removed from the right side exterior cover 28.

  FIG. 6 is a perspective view illustrating the binding device 80 in a state where it is detached from the printer 30. As shown in these drawings, the binding device 80 includes a main body 75 having an electric stapler and a holding body 50 that detachably holds the main body 75. The main body 75 is provided with an insertion portion 51. The bundle of recording sheets P stacked on the stack unit (29 in FIG. 4) of the printer 30 is picked up from the stack unit by the operator and then inserted into the insertion unit 51 of the binding device 80 as necessary. Then, the staples are driven and bound as one bundle.

  FIG. 7 is a perspective view for explaining the main body detachment of the binding device 80. 6 shows the binding device 80 with the main body 75 attached to the holding body 50, the main body 75 can be detached from the holding body 50 as shown in FIG.

  The holding body 50 includes a pedestal portion 36, a top plate portion 45, a metal first side plate 39, a metal second side plate 40, and the like. The first side plate 39 and the second side plate 40 support the pedestal portion 36 and the top plate portion 45 so as to face each other with a certain distance in the vertical direction.

  On the upper surface of the pedestal 36, two convex rails 37 projecting from the upper surface and extending in the left-right direction of the copying machine 100 (the arrow direction in FIG. 7 = the direction perpendicular to the paper surface in FIG. 4) are provided. Are arranged at a predetermined distance in the front-rear direction (left-right direction in FIG. 4). On the other hand, two concave grooves 52 extending in the left-right direction are provided at the bottom of the main body 75 so as to be arranged at a predetermined distance in the front-rear direction. When the main body 75 is attached to the holding body 50, the main body 75 is slid on the pedestal portion 36 so that the bottom of the main body 75 is rubbed against the upper surface of the pedestal portion 36 of the holding body 50. Along with this sliding movement, the two convex rails 37 of the pedestal portion 36 engage with the two concave grooves 52 of the main body 75 to guide the sliding movement of the main body 75 in the normal mounting direction.

  As described above, the binding device 80 includes the main body 75 and the holding body 50 so that the main body 75 is attached to and detached from the holding body 50 by sliding movement.

  In addition to the two convex rails 37, two locking concave portions 38 are formed on the upper surface of the pedestal portion 36. These locking recesses 38 are for locking the main body 75 correctly mounted on the holding body 50 at a regular mounting position.

  FIG. 8 is a partial cross-sectional view showing the pedestal portion 36 of the holding body 50 (see FIG. 7) and the main body 75 slidably moved on the pedestal portion 36 for attachment to the holding body 50. A pin 54 urged by a spring 60 is provided at the bottom of the main body 75. The pin 54 of the main body 75 slidably moved on the pedestal portion 36 for mounting is slid against the upper surface while being pressed against the upper surface of the pedestal portion 36 by the urging force of the spring 60.

  FIG. 9 is a partial cross-sectional view showing the pedestal portion 36 of the holding body 50 (see FIG. 7) and the main body 75 in a state where the holding body 50 is mounted at a regular mounting position. When the main body 75 is mounted at the proper mounting position of the holding body 50, the pin 54 of the main body 75 fits into the locking recess 38 of the pedestal portion 36 and is restrained in the locking recess 38 by the biasing force of the spring 60. The As a result, the main body 75 is locked at the regular mounting position of the holding body 50.

  FIG. 10 is a rear view showing the holding body 50. The first side plate 39 of the holding body 50 is provided with a rectangular through opening 39a and a through hole 39b. A double-sided tape 39c as a fixing means is attached to the back surface of the first side plate 39.

  FIG. 11 is a front view showing the holding body 50 attached to the right side exterior cover 28 of the printer 30 (see FIG. 4). A frame 27 of the printer 30 exists inside the right side exterior cover 28 of the printer 30 (left side in the figure). An electric circuit board 26 is fixed to the frame 27. A drawer connector (female) 25 is fixed to the electric circuit board 26. The frame 27, the electric circuit board 26, and the drawer connector (female) 25 are all components of the printer 30.

  The drawer connector (female) 25 erected on the electric circuit board 26 is exposed to the outside through a rectangular through-opening 28 a provided in the right side exterior cover 28.

  The holding body 50 of the binding device 80 (see FIG. 7) is separate from the right side exterior cover 28, and the double sided tape 39c attached to the first side plate 39 is attached to the right side of the printer 30 (see FIG. 4). By affixing to the outer surface of the surface exterior cover 28, the surface exterior cover 28 is fixed to the right surface exterior cover 28. Since the fixing with only the double-sided tape is fragile, the holding body 50 is also fixed with screws. Specifically, the screw portion 41 a of the male screw 41 as a fixing means inserted into the through hole 39 b of the first side plate 39 of the holding body 50 is also passed through the through hole of the right side exterior cover 28 of the printer 30. Thereafter, it is screwed onto the female screw of the frame 27. By this screwing, the holding body 50 is fixed to the frame 27 with screws.

  The printer 30 shown in FIG. 1 has a right side exterior cover 28 that can be removed from the main body for maintenance. This removal makes it possible to perform various maintenance operations by exposing the internal device of the printer 30 to the outside. This maintenance is not user-level maintenance but serviceman-level maintenance.

  FIG. 12 is a front view showing the holding body 50 with the male screw 41 removed from the frame 27 of the printer 30. When removing the right side exterior cover 28 from the main body of the printer 30, first, the male screw 41 of the holding body 50 is removed from the frame 27 of the printer 30 as shown in the figure. In this state, the holding body 50 is not fixed to the frame 27 of the printer 30, but is simply attached to the outer surface of the right side exterior cover 28 of the printer 30 by the double-sided tape 39c.

  FIG. 13 is a front view for explaining the state of the holding body 50 when the right side exterior cover 28 is removed from the main body of the printer 30 (see FIG. 1). By removing the male screw 41 as shown in FIG. 12, the right side exterior cover 28 can be removed from the main body of the printer 30 as shown in FIG. 13. After the maintenance is completed, the right side exterior cover 28 is attached to the main body of the printer 30, and then the screw portion 41 a of the male screw 41 is screwed into the female screw of the frame 27 to fix the holding body 50 to the frame 27.

  FIG. 14 is a front view showing an intermediate stage of the mounting operation of the main body 75 to the holding body 50 fixed to the printer 30 (see FIG. 1). The main body 75 of the binding device 80 is attached to the holding body 50 by being slid in the direction of the arrow in the figure on the upper surface of the pedestal portion 36 of the holding body 50. A drawer connector (male) 53 of the main body 75 protrudes from the side surface of the main body 75 and faces the drawer connector (female) 25 of the printer 30 (see FIG. 1) when attached.

  FIG. 15 is a front view showing the main body 75 in a state where the mounting operation on the holding body 50 fixed to the printer 30 (see FIG. 1) is finished. As illustrated, when the main body 75 is attached to the holding body 50, the drawer connector (male) 53 of the main body 75 passes through the through-opening 39 a provided in the first side plate 39 of the holding body 50. Then, the printer 30 (see FIG. 1) enters the through-opening 28a provided in the right side exterior cover 28. Then, it engages with a drawer connector (female) 25 of the printer 30. By this engagement, the printer 30 and the main body 75 of the binding device 80 are electrically connected.

  As described above, in the binding device 80, the main body 75 is provided with a drawer connector (male) 53 that engages with a drawer connector (female) 25 that is an external connector provided in the printer 30 as a sheet processing apparatus. Further, a through-opening 39 a for allowing the drawer connector (male) 53 to pass therethrough is provided in the first side plate 39 of the holding body 50. In accordance with the mounting operation of the main body 75 with respect to the holding body 50, the drawer connector (male) 53 is engaged with the drawer connector (female) 25 through the opening 39a for penetrating, so that the printer 30 and the main body 75 are bound together. The electric stapler is electrically connected. In such a configuration, that is, as the main body 75 is attached to the holding body 50, the electric connection between the main body 75 and the electric stapler can be automatically performed. Can be improved.

  In a state where electrical connection is made, when a bundle of recording sheets P is inserted into the slit-like insertion part 51 of the main body 75, an insertion detection sensor (55 in FIG. 17 described later) mounted on the main body 75 pulls the sheet bundle. Detect. Based on this detection, a stapler drive motor (57 in FIG. 17 described later) of the electric stapler is driven to drive staples into a bundle of recording sheets P.

  When removing the main body 75 from the holding body 50, a procedure reverse to the mounting operation may be performed. The main body 75 removed from the holding body 50 can be carried freely.

  FIG. 16 is a perspective view showing the main body 75 removed from the holding body 50 (see FIG. 15) from the back side. As illustrated, the main body 75 removed from the holding body 50 is in a state where the staple storage unit 61 is exposed. The replacement needle (staple) can be easily replenished to the main body 75 by inserting the replacement needle unit 74 into the staple storage unit 61 as necessary. This replenishment work can be performed in a free posture while the operator holds the main body 75 in his / her hand, so that maintainability can be improved unlike the case where the posture of bending or stretching is forced.

  Further, in the copying machine 100, as shown in FIG. 1, the binding device 80 may be shipped in a state of being fixed to the right side exterior cover 28 of the printer 30, or the binding device 80 is shown in FIG. The copying machine 100 that is not fixed to the printer may be shipped. That is, the binding device 80 can be separated from the main body side of the copying machine 100 and shipped independently as an optional product. Since the user who does not wish to purchase the binding device 80 can purchase the copying machine 100 in FIG. 5 without the binding device 80 mounted thereon, the user can flexibly respond to the user's wishes. be able to.

  FIG. 17 is a block diagram illustrating a main part of an electric circuit of the printer 30 and the binding device 80. When the drawer connector (female) 25 of the printer 30 and the drawer connector (male) 53 of the main body 75 of the binding device 80 are engaged as illustrated, various electrical contacts of the drawer connector (female) 25 and the drawer connector ( Male) 53 contacts with various electrical contacts. The former electrical contact includes a power output electrical contact. The latter electrical contact includes a power input electrical contact. When the two come into contact with each other, power is supplied from the printer 30 to the main body 75 of the binding device 80.

  The main body 75 of the binding device 80 is mounted with an electric stapler 59 as a binding means, an insertion detection sensor 55, and a motor drive control circuit 56. The electric stapler 59 includes a stapler driving motor 57 and a needle driving mechanism 58 serving as a driving machine. By driving the needle driving mechanism 58 with the driving force of the stapler driving motor 57, the staple driving operation is performed.

  A motor power circuit 24 and a sensor power circuit 23 are mounted on the electric circuit board 26 of the printer 30. The electric power output from the motor power supply circuit 24 is supplied to the stapler drive motor 57 and the motor drive control circuit 56 of the main body 75 of the binding device 80 via the drawer connector (female) 25 and the drawer connector (male) 53. . The power output from the sensor power supply circuit 23 of the printer 30 is supplied to the insertion detection sensor 55 of the main body 75 of the binding device 80 via the drawer connector (female) 25 and the drawer connector (male) 53.

  When a bundle of recording sheets P is inserted into the slit-like insertion part 51 of the main body 75 shown in FIG. 15, the insertion detection sensor 55 shown in FIG. 17 detects the recording sheet P and controls the drive of the detection signal by motor drive. Output to the circuit 56. Then, the motor drive control circuit 56 drives the stapler drive motor 57 by a predetermined drive amount to cause the needle driving mechanism 58 of the electric stapler 59 to perform a single driving operation. As a result, staples are driven into the recording sheet P inserted into the insertion portion 51.

  When the main body 75 is removed from the holding body 50 (see FIG. 14) in order to replenish the electric stapler 59 of the main body 75 with the replacement needle unit 74 (see FIG. 16), the power supply from the printer 30 to the main body 75 is stopped. Specifically, when the drawer connector (male) 53 of the main body 75 is disconnected from the drawer connector (female) 25 of the printer 30, the power supply from the printer 30 to the main body 75 via both connectors is cut off. Thereby, the electric stapler 59 is not driven. That is, when the main body 75 is removed from the holding body 50, the electric stapler 59 cannot be driven at the same time.

  If the electric stapler 59 malfunctions while holding the main body 75 in the hand, the hand may be injured. However, in the configuration in which the power supply to the electric stapler 59 of the main body 75 is cut off as the main body 75 is removed from the holding body 50 as in the binding device 80, the electric stapler 59 of the main body 75 held in the hand is removed. There is no malfunction. In such a configuration, it is possible to reduce the cost by avoiding malfunction without providing a dedicated mechanism or sensor for preventing erroneous operation.

  In addition, although the structure which connected the drawer connector (male) 53 of the main body 75 directly to the drawer connector 25 of the printer 30 was demonstrated, you may make it connect indirectly. For example, when the direct connection as described above cannot be performed due to the slide movement direction of the main body 75, the following may be performed. That is, as the main body 75 is attached to the holding body 50, the drawer connector of the main body 75 and the first drawer connector of the holding body 50 are engaged. The holding body 50 is provided with a second drawer connector separately from the first drawer connector, and both are connected by a harness. The second drawer connector of the holding body 50 is engaged with the drawer connector of the printer 30 as the holding body 50 is fixed to the outer surface of the printer 30.

  FIG. 18 is a perspective view showing the main body 75 with the upper cover (65 in FIG. 7) removed. The main body 75 can expose the inside by removing the upper cover as shown. An electric stapler 59 as a driving machine is disposed inside. The electric stapler 59 can reciprocate a needle driving mechanism 58 as a driving member in the direction of arrow B in the figure by driving a stapler driving motor (57 in FIG. 17). The arrow B direction is a direction along the vertical direction. The staple driving operation of the needle driving mechanism 58 is an operation of moving from the upper side to the lower side in the vertical direction. The needle driving mechanism 58 that has moved to the lower limit position sandwiches the sheet bundle between the driving member that accommodates the staples and the driving base 62. At this time, staples are driven into the sandwiched sheet bundle. In addition, the line to which the code | symbol Ps shown by the driving base 62 of the same figure was attached | subjected has shown the driving position of a staple. The driving base 62 is a constituent element of the electric stapler 59.

  FIG. 19 is a partial cross-sectional view showing a sheet bundle in which staples are driven and the periphery of the insertion portion 51 of the main body 75. In the figure, the insertion portion 51 forms a slit-like space between a first wall 65a that is a part of the upper cover 65 and a second wall 66a that is opposed to the first wall 65a with a gap therebetween. doing. The second wall 66 a is a part of the main body case 66 of the main body 75.

  A white arrow in the drawing indicates a driving direction of the staple 79 by the needle driving mechanism (58 in FIG. 18). In the thickness direction of the sheet bundle, the surface of the driving base 62 (the surface that receives the staple 79) is located between the first wall 65a and the second wall 66a.

  As shown in the drawing, the sheet bundle in which the staple 79 is driven by the main body 75 projects the staple 79 to the driving base 62 side from the surface facing the driving base 62 of the sheet bundle at the driving position Ps. It floats slightly from the surface of 62. Note that the staple 79 driven into the sheet bundle protrudes above the surface opposite to the pedestal facing surface in addition to projecting toward the driving pedestal 62 side from the pedestal facing surface of the sheet bundle.

  The maximum number of sheets in the sheet bundle inserted into the insertion unit 51 is 20. It is assumed that the sheet bundle is pulled out from the insertion portion 51 in a state where the facing portion 62 of the sheet bundle composed of the maximum number of sheets or the number of recording sheets P slightly floated as shown in the drawing. Then, in the binding device to which the present invention is not applied, as shown in FIG. 20, the staple 79 driven into the sheet bundle is hooked on the end portion of the first wall 65a, and the sheet bundle is taken out from the insertion portion. Or the recording sheet P may be torn forcibly taking out. In FIG. 20, the main body 75 in the binding device to which the present invention is not applied is shown, but the same reference numerals as those in the binding device 80 according to the embodiment are given to the respective reference numerals.

  There are two reasons why the staple driven into the sheet bundle can be easily hooked to the first wall 65a out of the first wall 65a and the second wall 66a. The first reason is that, among the first wall 65a and the second wall 66a, the first wall 65a is located on the side facing the linear portion of the staple. Specifically, the staple 79 driven into the sheet bundle includes a bent portion (79b in FIG. 23 described later) bent at both ends in the longitudinal direction and a linear portion (described later) between the bent portions. 79a) of FIG. The bent portion protrudes from one surface of the sheet bundle, while the straight portion protrudes from the other surface of the sheet bundle. In the longitudinal section of the staple 79, the protruding area of the straight part is larger than the protruding area of the bent part. Since the protruding amount in the sheet bundle thickness direction is approximately the same for the straight portion and the bent portion, the straight portion having a larger protruding area is more easily caught on the wall than the bent portion. Since the first wall 65a is on the side facing the straight line portion, the first wall 65a is easier to hook the staple 79 than the second wall 66a.

  The second reason is that the first wall 65a is present on the upper cover 65 on the opposite side of the main body case 66 where the first pedestal 65a is located. Specifically, as described above, in the thickness direction of the sheet bundle, the surface of the driving base 62 (the surface receiving the staple 79, hereinafter referred to as the base surface) is between the first wall 65a and the second wall 66a. Is located. In such a positional relationship between the wall and the pedestal surface, the sheet bundle is pushed by the pedestal in the insertion portion, and as shown in the drawing, the upper side opposite to the main body case 66 where the driving pedestal 62 is located. It bends toward the cover 65. Due to this bending, the first wall 65a on the upper cover 65 side becomes easier to hook the staple 79 than the second wall 66a.

  FIG. 21 is a partial perspective view illustrating the insertion portion 51 and the periphery of the binding device 80 according to the embodiment. In the figure, the first wall 65a, which is a component of the insertion portion 51, is connected to a straight portion of staples (79a in FIG. 23 described later) that is driven into a sheet bundle pulled out from the insertion portion 51. A recess 65a ′ is provided to avoid contact.

  On the other hand, as shown in FIG. 18, a recess 66a 'is provided in the second wall 66a (a part of the main body case 66) which is a component of the insertion portion (51 in FIG. 21). The recess 66 a ′ is for avoiding contact with the bent portions 79 b at both ends of the staple 79 driven into the sheet bundle pulled out from the insertion portion 51.

  FIG. 22 is a partial cross-sectional view illustrating a sheet bundle that is pulled out from the insertion portion 51 of the main body 75 of the binding device 80 according to the embodiment. Like the sheet bundle shown in FIG. 20, the sheet bundle shown in FIG. 20 includes the maximum number of recording sheets P or a number of recording sheets P close thereto. It is easy to hook 79a) of FIG. 23 on the first wall 65a. However, since the first wall 65a is provided with the depression 65a ′, the straight portion of the staple 79 driven into the sheet bundle passes through the depression 65a ′ as shown in the figure and enters the first wall 65a. The catch is avoided.

  As described above, in the binding device 80 according to the embodiment, the first wall 65a is provided with the recess 65a ′, so that the straight portion of the staple 79 when the sheet bundle is taken out from the insertion portion 51 (79a in FIG. 23). ) Can be suppressed.

  Further, in the binding device 80 according to the embodiment, the depression 66a ′ is provided in the second wall 66a, so that the bending portion (79b in FIG. 23) of the staple 79 when the sheet bundle is taken out from the insertion portion 51. You can also suppress the catch.

FIG. 23 is a side view showing the insertion portion 51 of the main body 75 of the binding device 80 when viewed from the front of the copying machine 100 with an angle of inclination of 45 degrees. The viewpoint is between the viewpoint of the front view and the viewpoint of the right side view. The sheet bundle shown in the figure is composed of the maximum number of recording sheets P. The thickness Tp is the thickness of a sheet bundle composed of the maximum number of recording sheets P. The slit width Ws is the opening width of the insertion portion 51 having a slit-like opening, and this is also the distance between the first wall 65a and the second wall 66a. Further, the driving thickness Ts is a size in the sheet bundle thickness direction of the staple 79 driven into the sheet bundle having the thickness Tp. The driving needle size L is the size in the extending direction of the staple 79 driven into the sheet bundle having the thickness Tp. The recess length x is the size of the recess 65a ′ of the first wall 65a in the extending direction. Further, the projection amount d ₁ is the amount of projection of the beam top surface of the projecting portion of a bundle upper surface of the staple 79 driven into the sheet bundle. The depth _{d 2} is the depth of the recess 65a 'of the first wall 65a. The depth d3 is the depth of the recess 66a ′ of the second wall 66a.

  In the binding device 80, the slit width Ws is set to be larger than the thickness Tp of the sheet bundle formed by the bundle of the maximum number of sheets (20 sheets in this example) of the recording sheets P. For this reason, a sheet bundle having a thickness Tp can be reliably inserted into the insertion portion 51. Note that the thickness Tp of the recording sheet P consisting of the maximum number of sheets is based on the thickness of the plain paper as the recording sheet P. As a staple in the case of binding a bundle of 20 sheets of plain paper, it is common to use a No. 10 needle. The No. 10 needle is suitable for binding a sheet bundle having a thickness of 8.40 [mm] or more and 9.48 [mm] or less as defined in JIS S6036.

Further, in the binding device 80, the recess length x of the recess 65a ′ of the first wall 65a is made larger than the driving needle size L. In addition, the depth d ₂ of the recess 65 a ′ of the first wall 65 a is made larger than the protruding amount d ₁ of the linear portion 79 a of the staple 79. Thus, the linear portion 79a of the staple 79 can be accommodated in the recess 65a ′. Since the thickness of the No. 10 needle is 0.5 [mm], the projection amount _{d 1} is greater than 0.5 [mm]. Therefore, the depth _{d 2} is also set to a value larger than 0.5 [mm]. If too large a depth d _2, since it becomes easier to enter the human finger into the insertion portion 51 at the position of the recess 65a ', the depth d ₂ is set to 2 [mm] or less of the value It is desirable to do.

Further, in the binding device 80, the length of the recess 66a ′ of the second wall 66a is made larger than the driving needle size L. In addition, a recess 66a depth d ₃ of the 'of the second wall 66a, is larger than the projection amount from the sheet stack surface in the bent portion 79b of the staple 79. Accordingly, the bent portion 79b of the staple 79 can be accommodated in the recess 66a ′.

  Of the first wall 65a and the second wall 65b, as shown in FIG. 24, the depression 65a 'may be provided only in the first wall 65a on which the staple 79 is more easily hooked.

  FIG. 25 is a schematic plan view for explaining a first example of insertion / removal of a sheet bundle with respect to the insertion portion 51 of the binding device 80 according to the embodiment. In the figure, the arrow α direction indicates the front-rear direction of the copying machine (100 in FIG. 1). An arrow β direction indicates a left-right direction of the copying machine. Further, the reference point Pa indicates a position where the rear end of the arrow α overlaps the left end of the arrow β. An arrow γ direction indicates a direction passing through the reference point Pa while being sandwiched between an arrow α (front-rear direction) and an arrow β (left-right direction). The direction of the arrow γ is a direction inclined by 45 ° with respect to each of the arrows α and β as shown in the figure. An arrow δ direction indicates a direction passing through the reference point Pa and inclined by 45 ° from the arrow γ.

  In the binding device 80, the staple 79 is driven in a posture extending in the arrow δ direction with respect to the sheet bundle. In such a binding device 80, in order to bind the spine cover side end portion (area indicated by arrow B in the figure) of the sheet bundle, the spine cover side end portion is connected to the insertion portion 51 as shown in the figure. When inserting the sheet bundle, the sheet bundle is generally inserted into and removed from the insertion portion 51 in the direction of the arrow γ. In this case, if the indentation length x of the indentation 65a ′ of the first wall 65a is set slightly larger than the needle driving length L, the protruding portion of the staple 79 from the upper surface of the sheet bundle is in the indentation 65a ′. Can pass through.

  FIG. 26 is a schematic plan view for explaining a second example of insertion / removal of a sheet bundle with respect to the insertion portion 51 of the binding device 80 according to the embodiment. In the second example, as illustrated, the corners of the sheet bundle are inserted into the insertion portion 51 in order to bind the corners of the sheet bundle. In the drawing, the distance D is a distance from the end of the insertion portion 51 on the recess 65a 'of the first wall 65a to the driving position Ps.

  In the binding device 80, the center in the extending direction of the staple 79 driven into the sheet bundle at the driving position Ps and the center in the longitudinal direction in the recess 65a ′ of the first wall 65a are on the same line extending in the arrow γ direction. Is located.

  Also in the second example shown in the figure, the operator generally inserts and removes the sheet bundle with respect to the insertion portion 51 in the direction of the arrow γ as in the first example. An operator who inserts and removes in the β direction rarely appears. In consideration of being inserted and removed in those directions, it is necessary to set the difference between the recess length x and the needle driving length L to be large to some extent.

Therefore, the binding device 80 satisfies the relationship of “dent length x> needle driving size L + 2 × distance Dtan 45 °”. This is for the reason explained below. That is, in this figure, an arrow alpha ₁ direction is a direction in front from behind the copier (100 in FIG. 1). When the operator pulls the sheet bundle from the insertion portion 51 along the arrow alpha ₁ direction, the end portion of the left side in the figure in the staple 79, it is positioned on the left side in the figure than the recesses 65a ', first There is a risk of being caught on the wall 65a. To avoid this caught is 'in figure ends of left recesses 65a of the staple 79' end staple 79 or recess 65a of the protrusion amount △ ₁ end, it needs to be larger than a predetermined value. The predetermined value can be obtained as a solution of the distance Dtan 45 ° by a trigonometric function.

On the other hand, in the figure, the direction of arrow β ₁ is the direction from the left side to the right side of the copying machine (100 in FIG. 1). When the operator pulls the sheet bundle from the insertion portion 51 along the arrow beta ₁ direction, the end portion of the right side in the figure in the staple 79, the figure is positioned on the right side of the recess 65a ', first There is a risk of being caught on the wall 65a. To avoid this caught is 'at the end of the right side in the drawing, the recess 65a of the staple 79' end staple 79 or recess 65a of the protrusion amount △ ₂ ends, needs to be larger than a predetermined value. The predetermined value can be obtained as a solution of the distance Dtan 45 ° by a trigonometric function.

That is, in each of the right end and the left end in the extending direction of the staple 79 and the recess 65a ′, it is necessary to make the protruding amount of the end of the recess 65a ′ from the end of the staple 79 larger than the distance Dtan 45 °. For this purpose, the relationship of “dent length x> needle driving size L + 2 × distance Dtan 45 °” must be satisfied. In other words, such in the context stitching device 80 that satisfy a worker direction deviated a sheet bundle is inserted into the insertion portion 51 from the normal direction (in the arrow γ direction) (an arrow alpha ₁ direction and the arrow even pulled in beta ₁ direction), it is possible to avoid snagging the first wall 65a of the straight portions of the staple 79 (79a in FIG. 23).

  FIG. 27 is a perspective view showing the main body 75 of the binding device 80. In the figure, the upper cover 65 of the main body 75 constitutes a housing portion on one side in the driving direction of the staple 79 with the insertion portion 51 as a boundary. Further, the main body case 66 of the main body 75 constitutes a housing portion on the other side with the insertion portion 51 as a boundary. As illustrated, in the binding device 80 according to the embodiment, the upper cover 65 and the main body case 66 have different colors. In such a configuration, the visibility of the insertion portion 51 can be improved due to the difference in color, and the operator can easily insert the sheet bundle into the insertion portion 51.

  In the copying machine 100 according to the embodiment, as shown in FIG. 1, the exterior cover of the printer 30 also has different colors on one side and the other side in the driving direction of the staple 79 with the insertion portion 51 as a boundary. It is In addition, the color of one part is the same color as the upper cover 65 of the main body 75 of the binding device 80, and the color of the other part is the same color as the main body case of the main body 75. Thereby, the sense of unity between the printer 30 and the binding device 80 can be improved, and the appearance quality of the combination can be improved.

  Although the example in which the holding body (50 in FIG. 7) of the binding device 80 is fixed to the right side surface of the printer 30 has been described, the holding body may be fixed to another location (for example, the left side surface) of the printer 30. Good.

  Further, the copying machine 100 in which the binding device 80 is fixed to the printer 30 as the processing device has been described. However, the processing device is different from the printer 30, for example, a post-processing device such as punching a recording sheet or a sheet inserter. The binding device 80 may be fixed.

  Further, the binding device 80 mounted on the electrophotographic printer 30 that develops the electrostatic latent image with toner has been described. However, the binding device 80 is mounted on a printer that forms an image by a method different from the electrophotographic method. Also good. For example, an inkjet printer that forms an image on the recording sheet P using an inkjet head may be used.

What was demonstrated above is an example, and there exists an effect peculiar for every following aspect.
[First aspect]
In the first aspect, an insertion portion (for example, the insertion portion 51) for inserting a sheet bundle, and a driving machine (for example, a needle driving mechanism 58) for driving a binding needle (for example, a staple 79) into the sheet bundle inserted into the insertion portion. And a first wall (for example, the first wall 65a) of the insertion portion facing each other in the sheet bundle thickness direction. And the hollow is provided in at least one of the 2nd wall (for example, 2nd wall 66a), It is characterized by the above-mentioned.

  In the first aspect, when the sheet bundle is taken out from the insertion part, the protruding portion from the bundle surface of the binding needle driven into the sheet bundle is passed through the depression of the first wall or the second wall, thereby binding the binding needle. The first wall or the second wall can be prevented from being caught.

[Second embodiment]
The second aspect is that, in the first aspect, of the first wall and the second wall, at least the wall on the side facing the linear part between the bent parts at both ends of the binding needle is provided with the depression. It is a feature. In such a configuration, the binding needle that is driven into the sheet bundle and bent at both ends has a bent portion (for example, 79b) positioned at each of the both ends and a linear portion (for example, 79a) between them. If the rubbing pressure of the straight portion against the wall and the rubbing force of the bent portion against the wall are the same, the straight portion is more easily caught on the wall than the bent portion. For this reason, by providing a recess in the wall on the side facing the straight portion of the first wall and the second wall, the occurrence of catching is suppressed as compared with the case of providing a recess in the wall on the side facing the bent portion. be able to.

[Third Aspect]
A 3rd aspect WHEREIN: The 1st or 2nd aspect WHEREIN: The said driving machine has a driving member which performs driving | running operation | movement, and a driving base (for example, driving base 62), The surface of the said driving base is It is located between the first wall and the second wall in the sheet bundle thickness direction, and the depression is at least on the opposite side of the first wall and the second wall from the placement base. It is provided on the wall. With such a positional relationship between the wall (first wall and second wall) and the surface of the driving base, when the sheet bundle is extracted from the insertion portion, the sheet bundle is opposite to the driving base. The binding needle that is driven into the sheet bundle is easily caught on the opposite wall. For this reason, by providing a recess in the opposite wall, it is possible to suppress the catching of the sheet bundle as compared with the case where a recess is provided in the wall on the side where the driving base is located.

[Fourth aspect]
The fourth aspect is the first, second, or third aspect, and includes a conveying unit that conveys a sheet (for example, the recording sheet P) and a processing unit that performs a predetermined process on the sheet in the conveyance path of the conveying unit. And binding a sheet bundle composed of a plurality of manually inserted sheets. In such a configuration, a sheet bundle composed of a plurality of sheets that have been subjected to predetermined processing by the processing means can be bound by the binding device.

[Fifth aspect]
The fifth mode is the size of the recess in the extending direction, compared to the driving needle size (the driving needle size L), which is the size in the extending direction of the binding needles driven into the sheet bundle in the fourth mode. This is characterized in that the recess length (for example, the recess length x) is increased. In such a configuration, when the sheet bundle is taken out from the insertion portion, the protruding portion from the surface of the sheet bundle in the binding needle driven into the sheet bundle can be passed through the depression of the first wall.

[Sixth aspect]
A sixth aspect is the fifth aspect, wherein the distance from the inlet side end of the insertion portion to the driving position by the driving machine is D, the driving needle size is L, and the hollow length is x. In this case, the relationship of “x> L + 2D tan 45 °” is satisfied. In this configuration, as described in the embodiment, even if the operator pulls out the sheet bundle inserted into the insertion portion in the direction deviated from the normal direction, the first protruding portion of the binding needle from the sheet bundle surface is used. It is possible to avoid being caught on the wall.

[Seventh aspect]
A seventh aspect is characterized in that, in the fourth, fifth or sixth aspect, the recess is provided in both the first wall and the second wall. In such a configuration, when the sheet bundle is taken out from the insertion portion, both the hooking of the binding needle driven into the sheet bundle to the first wall and the hooking to the second wall can be suppressed.

[Eighth aspect]
An eighth aspect is the fourth, fifth, sixth or seventh aspect, wherein the main body (for example, the main body case 66) including the insertion portion and the driving machine and the sheet processing casing are separated. And a holding body (for example, holding body 50) that removably holds the main body while being fixed to the outer surface of the housing by a fixing means (for example, double-sided tape 39c, male screw 41). It is what. In such a configuration, an operator who has the main body removed from the holding body in his / her hand can perform a replacement needle replenishment operation on the main body in a free posture. Unlikely, maintainability can be improved. Furthermore, the binding device can be fixed to the casing of the sheet processing apparatus by the fixing means, and can be detached from the casing by releasing the fixing means. Thus, the binding device can be separated from the sheet processing device and shipped independently as an optional product. Since a user who does not wish to purchase a binding device can purchase a sheet processing device that is not equipped with a binding device, the user can flexibly respond to the user's wishes.

[Ninth aspect]
A ninth aspect includes a conveying unit that conveys the sheet, a processing unit that performs a predetermined process on the sheet in the conveyance path of the conveying unit aspect, and a binding device that binds a bundle of a plurality of manually fed sheets. In the sheet processing apparatus, any one of second to eighth is used as the binding apparatus.

[Tenth aspect]
The tenth aspect includes a conveying means for conveying the recording sheet, a recording means as a processing means for performing an image recording process as a predetermined process on the recording sheet in the conveying path of the conveying means aspect, and a plurality of manually fed sheets. In an image forming apparatus as a sheet processing apparatus having a binding device for binding a bundle of recording sheets, any one of the second to eighth binding devices is used as the binding device.

1: Photosensitive member 3: Developing device 3a: Developing sleeve (developer carrier)
4: Charging device 5: Transfer roller 6: Optical writing device 7: Toner cartridge 8: Paper feed roller 9: Registration roller pair 10: Paper feed cassette 11: Fixing device 12: Paper discharge roller pair 13: Drum cleaning device 14: Static elimination lamp 23: Sensor power circuit
24: Motor power circuit (power supply)
25: Drawer connector (external connector)
27: Frame 28: Right side exterior cover 28a: Through opening 29: Stack part 30: Printer 36: Base part 37: Convex rail 38: Locking concave part 39: First side plate 39a: Through hole 39b: Through hole 39c: Both sides Tape (fixing means)
40: Second side plate 41: Male screw (fixing means)
45: Top plate portion 50: Holding body 51: Insertion portion 52: Groove 53: Drawer connector 54: Pin 55: Insertion detection sensor 56: Motor drive control circuit 57: Stapler drive motor 58: Needle drive mechanism (drive member) )
59: Electric stapler (driving machine)
60: Spring 61: Staple storage section 62: Driving base 65: Upper cover 65a: First wall 65a ': Depression 66: Main body case 66a: Second wall 66a': Depression 74: Replacement needle unit 75: Main body 79: Staple 79a: Straight part 79b: Bending part 80: Binding device 90: Scanner 95: Reading part 99: ADF
100: Copy machine

JP 2000-317861 A

Claims (10)

In the binding device comprising: an insertion portion for inserting a sheet bundle; and a driving machine for driving a binding needle into the sheet bundle inserted into the insertion portion, and binding the sheet bundle by driving the binding needle.
A binding device, wherein a recess is provided in at least one of the first wall and the second wall of the insertion portion facing each other in the sheet bundle thickness direction. The binding device according to claim 1, wherein
The binding device according to claim 1, wherein the recess is provided in at least a wall of the first wall and the second wall facing a straight portion between bent portions at both ends of the binding needle. The binding device according to claim 1 or 2,
The driving machine has a driving member that performs a driving operation, and a driving base,
The surface of the driving pedestal is located between the first wall and the second wall in the sheet bundle thickness direction,
The binding device according to claim 1, wherein the recess is provided on at least a wall of the first wall and the second wall opposite to the placement base. The binding device according to claim 1, 2, or 3,
A sheet bundle comprising a plurality of manually fed sheets mounted on a sheet processing apparatus having a conveying unit that conveys a sheet and a processing unit that performs a predetermined process on a sheet in the conveyance path of the conveying unit. A binding device characterized by the above. The binding device according to claim 4, wherein
2. A binding apparatus according to claim 1, wherein a depression length, which is a size in the extending direction of the depression, is made larger than a driving needle size which is a size in the extending direction of the binding needle driven into the sheet bundle. The binding device according to claim 5, wherein
When the distance from the inlet side end of the insertion portion in the recess to the driving position by the driving machine is expressed as D, the size of the driving needle is expressed as L, and the length of the recess is expressed as x, “x> L + 2Dtan 45 ° "A binding device characterized by satisfying the relationship" The binding device according to claim 4, 5 or 6,
The binding device according to claim 1, wherein the recess is provided in both the first wall and the second wall. The binding device according to claim 4, 5, 6 or 7,
The main body including the insertion portion and the driving machine and the casing of the sheet processing apparatus are separate from each other, and the main body is detachably held in a state of being fixed to the outer surface of the casing by a fixing unit. And a holding body that
A binding device, wherein a color is different between a housing portion on one side and a housing portion on the opposite side in the binding direction of the binding needle by the driving machine with the insertion portion as a boundary. In a sheet processing apparatus comprising: a conveying unit that conveys a sheet; a processing unit that performs a predetermined process on a sheet in a conveyance path of the conveying unit; and a binding device that binds a bundle of a plurality of manually inserted sheets.
A sheet processing apparatus using the binding apparatus according to any one of claims 2 to 8 as the binding apparatus. A binding unit that transports a recording sheet, a recording unit as a processing unit that performs an image recording process, which is a predetermined process, on a recording sheet in a transport path of the transport unit, and a bundle of a plurality of manually fed recording sheets In an image forming apparatus as a sheet processing apparatus having a binding device,
An image forming apparatus using the binding device according to claim 2 as the binding device.