JP2021024018A - Staple removal device - Google Patents

Abstract

To provide a staple removal device which can remove staples having various wire sizes from a paper bundle.SOLUTION: A staple removal device 1A includes: a mounting base 102 on which a paper bundle bound by staples is mounted; a removal part 120 that is positioned below the mounting base 102, includes a tip part 122S that can be inserted between the paper bundle and the staples, and for removing the staples from the paper bundle by inserting the tip part 122s between the paper bundle and a crown part of the staples; and a first motor 152 for moving the removal part 120. The removal part 120 has a crown holder 126 that holds the crown part of the staples removed from the paper bundle by the removal part 120, and is configured so that one end side is relatively openable/closable to the tip part 122s of the removal part 120.SELECTED DRAWING: Figure 3

Description

The present disclosure relates to a staple removing device.

Conventionally, a staple removing device for removing staples from a bundle of paper created by binding a plurality of sheets of paper using staples (needle) having a crown portion and a pair of legs has been used. In a general staple removing device, after pressing the paper in the vicinity of the staple with a pressing member, the staple is removed from the staple by inserting a wedge plate between the bundle of paper and the crown portion of the staple.

Here, in the paper bundle, the load on the paper surface of the pair of legs that are bent inward through the staple paper bundle may not be uniform. If the staples are removed from the bundle of paper in this state, one leg will come out of the bundle of paper first, and the other leg will remain in the bundle of paper, and the staples cannot be removed from the bundle of paper. There was a case that it ended up.

In order to solve such a problem, the techniques described in Patent Documents 1 and 2 shown below have been proposed. For example, Patent Document 1 describes a manual stapler provided with a nail holding portion that overlaps the needle pulling portion at the end of the bottom plate and holds a nail during the needle pulling operation. Further, Reference Document 2 describes a staple removing device provided with a leaf spring for holding the staples that have entered between the staple plates in parallel and pulling them out without any trouble.

Jikkenhei 5-16161 Japanese Patent Application Laid-Open No. 08-141935

By the way, when binding a bundle of paper with staples, staples having various wire diameters are used depending on the number of sheets to be bound and the like. For example, a staple having a large wire diameter is used when binding 30 to 50 sheets, and a staple having a small wire diameter is used when binding 2 to 3 sheets. When removing staples from these various paper bundles, the conventional staple removing device has the following problems.

Specifically, when removing staples from a bundle of paper bound with staples with a large wire diameter, a load above a certain level is applied by the holding portion that holds the crown portion in order to prevent one leg of the staple from coming off first. It is necessary to hold down the crown part with. On the other hand, when removing staples from a bundle of paper bound with staples with a small wire diameter, if the bundle of paper is pressed with a higher load by the holding portion, the staples are firmly sandwiched between the wedge plate and the holding portion. The staples may be dragged as the paper moves forward, causing poor removal such as tearing of the paper. The techniques disclosed in Patent Documents 1 and 2 have a problem that it is difficult to solve the above-mentioned two problems at the same time.

Therefore, an object of the present invention is to provide a staple removing device capable of removing staples having various wire diameters from a bundle of papers in order to solve the above problems.

The first aspect of the present disclosure is a mounting table on which a stack of paper bound by staples is placed, and a tip portion located below the above-mentioned stand and insertable between the bundle of paper and the staple. The removal is provided with a removing portion that removes the staple from the paper bundle by inserting the tip portion between the paper bundle and the crown portion of the staple, and a motor that moves the removing portion. The portion has a holding portion that holds the crown portion of the staple that is removed from the paper bundle by the removing portion, and one end side is configured to be openable and closable relative to the tip portion of the removing portion. Regarding staple removal device.

According to the present disclosure, since one end side of the holding portion is configured to be openable and closable relative to the tip portion of the removing portion, the amount of opening between the removing portion and the holding portion is increased according to the wire diameter of the staple used. Can be set, and staples of various wire diameters can be removed from the paper bundle.

It is a front perspective view of the staple removal device which concerns on this embodiment. It is a rear perspective view of the staple removal device which concerns on this embodiment. It is a right front perspective view of the inside of the staple removal device when the removal part which concerns on this embodiment is in a standby position. It is a left front perspective view of the inside of the staple removal device when the removal part which concerns on this embodiment is in a standby position. It is a top view of the inside of the staple removal device when the removal part which concerns on this embodiment is in a standby position. It is a top view of the drive part inside the staple removal device which concerns on this embodiment. It is a side view of the inside of the staple removal device when the removal part which concerns on this embodiment is in a standby position. It is a side sectional view of the inside of the staple removal apparatus when the removal part which concerns on this embodiment is in a standby position. It is an exploded perspective view of the staple pulling mechanism which concerns on this embodiment. It is a top view of the removal part which concerns on this embodiment. It is a side view of the removal part which concerns on this embodiment. It is sectional drawing along the line AA of the removal part of FIG. 5A. It is an exploded perspective view of the paper holding mechanism which concerns on this embodiment. It is a perspective view of the inside of the staple removal device provided with the frame which concerns on this embodiment. It is an exploded perspective view of the staple removal device provided with the frame which concerns on this embodiment. It is a perspective view which shows the operation of the staple pulling mechanism in the standby position which concerns on this embodiment. It is a perspective view which shows the operation of the staple pulling mechanism which moves to the removal position which concerns on this embodiment. It is a side view of the main part which shows the operation of the staple pulling mechanism in the standby position which concerns on this embodiment. It is a side view of the main part which shows the operation of the staple pulling mechanism which moves to the removal position which concerns on this embodiment. It is a side view which shows the operation of the staple pulling mechanism in the standby position which concerns on this embodiment. It is a side view of the main part which shows the operation of the staple pulling mechanism shown in FIG. 11A. It is a side view which shows the operation of the staple pulling mechanism which moves to the removal position which concerns on this embodiment. It is a side view of the main part which shows the operation of the staple pulling mechanism shown in FIG. 12A. It is a perspective view which shows the operation of the paper holding mechanism in the standby position which concerns on this embodiment. It is a perspective view which shows the operation of the paper holding mechanism which moves to a pressing position which concerns on this Embodiment. It is a side view of the main part which shows the operation of the paper holding mechanism in the standby position which concerns on this embodiment. It is a side view of the main part which shows the operation of the paper holding mechanism which moves to a pressing position which concerns on this Embodiment. It is a side view which shows the operation of the staple removal apparatus at the time of removing the staple from the paper bundle which concerns on this embodiment. It is a side view which shows the operation of the staple removal apparatus at the time of removing the staple from the paper bundle which concerns on this embodiment. It is a side view which shows the operation of the staple removal apparatus at the time of removing the staple from the paper bundle which concerns on this embodiment. It is a side view which shows the operation of the staple removal apparatus at the time of removing the staple from the paper bundle which concerns on this embodiment. It is a side view which shows the operation of the staple removal apparatus at the time of removing the staple from the paper bundle which concerns on this embodiment. It is a side view which shows the operation of the staple removal apparatus at the time of removing the staple from the paper bundle which concerns on this embodiment. It is a side view which shows the operation of the staple removal apparatus at the time of removing the staple from the paper bundle which concerns on this embodiment. It is an enlarged view of the main part which shows the operation of the wedge plate at the time of removing the staple from the paper bundle which concerns on this embodiment. It is an enlarged view of the main part which shows the operation of the wedge plate at the time of removing the staple from the paper bundle which concerns on this embodiment. It is an enlarged view of the main part which shows the operation of the wedge plate at the time of removing the staple from the paper bundle which concerns on this embodiment. It is an enlarged view of the main part which shows the operation of the wedge plate at the time of removing the staple from the paper bundle which concerns on this embodiment. It is an enlarged view of the main part which shows the operation of the wedge plate at the time of removing the staple from the paper bundle which concerns on this embodiment. It is a figure which shows the state of the wedge plate and the staple when the staple is removed from the paper bundle which concerns on this embodiment. It is a figure which shows the state of the wedge plate and the staple when the staple is removed from the paper bundle which concerns on this embodiment. It is a figure which shows the state of the wedge plate and the staple when the staple is removed from the paper bundle which concerns on this embodiment. It is a figure which shows the state of the wedge plate and the staple when the staple is removed from the paper bundle which concerns on this embodiment. It is a figure which shows the state of the wedge plate and the staple when the staple is removed from the paper bundle which concerns on this embodiment. It is the schematic which shows the operation example of the removal part at the time of removing the staple from the paper bundle bound by the staple with a small wire diameter which concerns on this embodiment. It is a schematic diagram which shows the operation example of the removal part at the time of removing the staple from the paper bundle bound by the staple with a small wire diameter which concerns on this embodiment. It is a schematic diagram which shows the operation example of the removal part at the time of removing the staple from the paper bundle bound by the staple with a small wire diameter which concerns on this embodiment. It is a schematic diagram which shows the operation example of the removal part at the time of removing the staple from the paper bundle bound by the staple with a large wire diameter which concerns on this embodiment. It is a schematic diagram which shows the operation example of the removal part at the time of removing the staple from the paper bundle bound by the staple with a large wire diameter which concerns on this embodiment. It is a schematic diagram which shows the operation example of the removal part at the time of removing the staple from the paper bundle bound by the staple with a large wire diameter which concerns on this embodiment. It is the schematic of the removal part including the crown holder which concerns on another Embodiment 1. FIG. It is the schematic of the removal part including the crown holder which concerns on another Embodiment 1. FIG. It is the schematic of the removal part including the crown holder which concerns on another Embodiment 1. FIG. It is the schematic of the removal part including the crown holder which concerns on another Embodiment 2. It is the schematic of the removal part including the crown holder which concerns on another Embodiment 2. It is the schematic of the removal part including the crown holder which concerns on another Embodiment 2. It is an exploded perspective view of the removal part which concerns on another Embodiment 3. It is a top view of the removal part which concerns on another Embodiment 3. It is a side view of the removal part shown in FIG. 23A. FIG. 3 is a cross-sectional view taken along the line CC of the removal portion shown in FIG. 23A. FIG. 5 is an enlarged view of a main part of a wedge plate, staples, and a crown holder when removing staples from a bundle of paper according to another third embodiment. FIG. 5 is an enlarged view of a main part of a wedge plate, staples, and a crown holder when removing staples from a bundle of paper according to another third embodiment.

Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the drawings.

[Example of appearance configuration of staple removal device 1A]
FIG. 1A is a front perspective view of the staple removing device 1A, and FIG. 1B is a rear perspective view of the staple removing device 1A. 2A is a right front left rear perspective view of the inside of the staple removing device 1A, and FIG. 2B is a left front right rear perspective view of the inside of the staple removing device 1A.

The staple removing device 1A is a device for automatically removing (removing) staples from a bundle of paper bound by staples, and includes a housing 100 having a substantially rectangular parallelepiped shape and a mounting table 102 on which the bundle of paper is placed. , Located below the mounting table 102 (inside the housing 100 with respect to the mounting table 102), it drives the removing unit 120 and the removing unit 120 that remove staples from the paper bundle mounted on the mounting table 102. The first motor 152 and the accommodating portion 200 accommodating the staples removed by the removing unit 120 are provided.

A cover portion 104 that covers a part of the mounting table 102 is provided above the mounting table 102 (the side on which the paper bundle is placed with respect to the mounting table 102). A predetermined gap is formed between the cover portion 104 and the mounting table 102, and a bundle of paper is inserted into this gap. An activation switch 106 for operating the staple removal device 1A is provided on the upper surface of the cover portion 104. In the present embodiment, the side where the accommodating portion 200 is provided is the rear front side of the staple removal device 1A, and the opposite side is the front side of the staple removal device 1A.

The housing 100 is a substantially rectangular parallelepiped box with an opening at the top, and is provided with a removing portion 120, a first motor 152, an accommodating portion 200, and the like inside.

The mounting table 102 is provided so as to cover the opening above the housing 100, and has a mounting surface 102a for mounting a bundle of paper. An opening 102b is formed on the mounting surface 102a so that a part of the removing portion 120 can be projected.

The removing portion 120 has a predetermined length from the tip portion 122s to the base end portion 122k. The removing portion 120 includes a tip portion 120s that can be inserted between the paper bundle and the staple (crown portion Sa), and the wedge plate main body 122a, which is the first portion for removing the staple from the paper bundle, and racks 130 and 131. It has a wedge plate base portion 122f which is a second part driven by the driving force of the first motor 152 received in the above, and a constricted part 122c which is a third part located between the first part and the second part.

The wedge plate body 122a is composed of an elongated plate-shaped member, and at least the tip portion 122s thereof is formed in a wedge shape so as to be easily inserted between the paper bundle and the staples and to easily pull out the staples from the paper bundle. Has been done. In the present embodiment, the wedge plate main body 122a has a tapered shape from the base end portion 122k toward the tip end portion 122s. Specifically, in the side view, the plate thickness is gradually reduced from the base end portion 122k toward the tip end portion 122s, and in the top view, the plate width is gradually narrowed toward the tip end portion 122s. It is configured in.

The wedge plate base portion 122f supports the wedge plate main body 122a via the constricted portion 122c, and has a role of receiving the power from the first motor 152 by the racks 130 and 131 and transmitting the power to the wedge plate main body 122a. As shown in FIG. 4 and the like, the wedge plate base portion 122f includes a blade holder 124 formed of a flat plate having a substantially U-shaped cross section, and a pair of racks 130 and 131 attached to the side surfaces of the blade holder 124. A wedge plate main body 122a and an attachment portion 122b extending from the wedge plate base portion 122f are attached to the upper surface of the blade holder 124. The racks 130 and 131 are plate-shaped members having substantially the same length as the longitudinal direction of the blade holder 124, and a plurality of teeth (rack) that mesh with the pinion 158, which will be described later, are formed on the lower surface thereof, and the first motor 152. Receives the driving force of.

A paper bundle insertion port 108 for setting a paper bundle in the cover portion 104 is provided between the mounting table 102 and the cover portion 104. The start switch 106 is provided on the upper surface of the cover portion 104 so that the user can easily operate it, and is composed of a button for operating the staple removing device 1A. The accommodating portion 200 is a box body having an opening at the upper side, and is configured to be removable with respect to the opening 100a formed on the rear end surface of the housing 100. The accommodating portion 200 is arranged in a space portion in the lower rear part of the housing 100 than the central portion.

Here, for convenience, the staple S in a state in which the paper bundle P is bound will be described with reference to FIG. 17A described later. The staple S has a crown portion Sa and a pair of leg portions Sb, Sb formed by bending both ends of the crown portion Sa in the longitudinal direction. The paper bundle P penetrates a pair of staples Sb, Sb from the bottom layer of a plurality of stacked sheets toward the top layer, and bends the penetrated legs Sb, Sb inward. It is bound by that. The binding position of the staple S is, for example, a corner or an edge of the paper. In the present embodiment, the staple S is removed from such a bundle of paper P.

[Example of internal configuration of staple removal device 1A]
Next, the internal configuration of the staple removing device 1A will be described. FIG. 2A is a right front perspective view of the inside of the staple removing device 1A when the removing unit 120 is in the standby position, and FIG. 2B is a left front perspective view of the inside of the staple removing device 1A when the removing unit 120 is in the standby position. FIG. 2C is a plan view of the inside of the staple removal device 1A when the removal unit 120 is in the standby position, FIG. 2D is a plan view of the first drive unit 150 and the like inside the staple removal device 1A, and FIG. 2E shows the removal unit 120. It is a side view of the inside of the staple removal device 1A in the standby position. FIG. 3 is a side sectional view of the inside of the staple removing device 1A when the removing portion 120 is in the standby position. FIG. 4 is an exploded perspective view of the staple removing mechanism 110. 5A is a plan view of the removal unit 120, FIG. 5B is a side view of the removal unit 120, and FIG. 5C is a cross-sectional view of the removal unit 120 along the line AA. FIG. 6 is an exploded perspective view of the paper holding mechanism 160.

The staple removing device 1A includes a staple removing mechanism 110 that removes the staple S from the paper bundle P, a paper holding mechanism 160 that presses the paper bundle P placed on the mounting table 102, and the above-mentioned accommodating portion 200. ing.

[Structure example of staple removal mechanism 110]
As shown in FIG. 3 and the like, the staple removing mechanism 110 is arranged inside the housing 100 below the mounting surface 102a of the mounting table 102, and is inserted between the paper bundle P and the staples to form a paper bundle. It has a removing unit 120 for removing staples S from P, a holding unit 140, and a first driving unit 150 for driving the removing unit 120.

As shown in FIGS. 5 and 9, the removing portion 120 has a wedge plate 122 inserted between the crown portion Sa of the staple S and the paper bundle P, and the wedge plate 122 of the crown portion Sa and the paper bundle P. The racks 130 and 131 to be moved between them are provided.

In this embodiment, as an example of the configuration of the removing portion 120, a blade holder 124 to which the wedge plate 122 is attached, a crown holder 126 that supports the crown portion Sa of the staple S, and a holder 128 that regulates the position of the wedge plate 122. To be equipped.

As shown in FIGS. 4 and 5A to 5C, the wedge plate 122 is composed of an elongated plate-shaped member, and includes a wedge plate main body 122a, a mounting portion 122b, and a constricted portion 122c. The tip 122s is configured to be movable along the plane of the mounting table 102 between the standby position L1 and the removal position L2, and when the tip 122s moves to the removal position L2, the tip 122s is the paper bundle P and the staple. It is inserted between and.

In the present embodiment, the standby position L1 of the removing unit 120 means a position where the removing unit 120 is stopped before starting the removing operation. The removal position L2 of the removal unit 120 means that the removal unit 120 starts the removal operation, the removal unit 120 is inserted between the crown portion Sa of the staple S and the paper bundle P, and the staple S is removed from the paper bundle P. Means the position.

The mounting portion 122b is integrally formed on the side of the base end portion 122k of the wedge plate main body 122a, and is mounted on the upper surface of the blade holder 124. The constricted portion 122c is a substantially central portion in the longitudinal direction of the wedge plate 122, and is formed between the wedge plate main body 122a and the mounting portion 122b. As shown in FIG. 5A, at least a part of the width dimension D1 of the constricted portion 122c is narrower than the width dimension D2 of the base end portion 122k of the wedge plate main body 122a, and when the staple S separates from the wedge plate 122, The width dimension D3 between the legs Sb and Sb of the staple S (see FIG. 17E) is narrower than the width dimension D3 (see FIG. 17E) between the legs Sb and Sb of the staple S due to the springback that tries to return the staple S legs Sb and Sb to the inwardly bent state.

As shown in FIG. 4 and the like, the blade holder 124 is formed of a flat plate having a substantially U-shaped cross section, a mounting portion 122b is mounted on the upper surface thereof, and the blade holder 124 is arranged so as to be stacked above the crown holder 126.

As shown in FIG. 4 and the like, the crown holder 126 is arranged below the wedge plate 122 with the blade holder 124 interposed therebetween, and supports the crown portion Sa of the staple S removed from the paper bundle P. The crown holder 126 is configured so that its tip side can move (open and close) in a direction approaching and away from the tip portion 122s of the wedge plate 122 with the first drive shaft 136 as a fulcrum. The crown holder 126 has a groove portion 126a for preventing contact with the pressing portion 140 when the wedge plate 122 moves from the front to the rear, and a staple S removed from the paper bundle P for dropping the staple S into the accommodating portion 200. Includes an opening 126b. The opening 126b of the crown holder 126 and the constricted portion 122c of the wedge plate 122 attached to the blade holder 124 are arranged so as to be in the same position in a plan view. The groove portion 126a is cut out from the tip end portion of the crown holder 126 to substantially the center portion, and has a width slightly wider than the width of the pressing portion 140. The opening 126b is formed at a substantially central portion in the longitudinal direction of the crown holder 126 and continuously on the proximal end side of the groove portion 126a, and has a width at least wider than the length of the crown portion Sa of the staple S.

As shown in FIGS. 4 and 5C, the restricting portions 127a and 127b are integrally formed on the upper surface of the crown holder 126 on the base end side and at both ends in the width direction, and face the blade holder 124 side from the upper surface thereof. Is protruding. The regulating portions 127a and 127b come into contact with the lower surface 124a of the blade holder 124 when the tip end side of the crown holder 126 is opened to a preset opening amount (hereinafter referred to as a set value) with respect to the wedge plate 122, and the crown holder 126 It is regulated so that the tip side of is not opened more than the set value. The regulating portions 127a and 127b may be formed of a member different from the crown holder 126. Further, the shape of the regulating portions 127a and 127b is, for example, a rectangular shape having a curved upper end, but the shape is not limited to this shape as long as it can be brought into contact with the crown holder 126.

Between the upper surface 126c of the base end portion of the crown holder 126 and the lower surface 124a of the base end side of the blade holder 124, the tip end portion 122s of the wedge plate 122 and the tip end side of the crown holder 126 are urged in a relatively close direction. The spring 125 is arranged. In the present embodiment, the load of the spring 125 is set according to the staple S having a smaller wire diameter among the staples S to be used. This is because when the load of the spring 125 is large, the staple S is sandwiched between the crown holder 126 and the wedge plate 122 with a stronger load, and is dragged as it moves from the front to the rear of the wedge plate 122, whereby the paper This is because the staple through hole may be torn and the staple through hole may be enlarged. When removing the staple S having a large wire diameter, it is possible that the load of the presser by the crown holder 126 is insufficient, but the opening amount of the crown holder 126 is adjusted to the staple S having a large wire diameter by the regulating portions 127a and 127b. This makes it possible to obtain the optimum presser load.

The holder 128 is formed of a flat plate having a substantially U-shaped cross section, and is arranged so as to be overlapped on the upper surface of the blade holder 124. The holder 128 has an opening 128a that exposes the wedge plate 122, and a support 128b that regulates the holding portion 140 to be located below the mounting base 102 when at least the removing portion 120 is stopped at the standby position L1. And include.

On the left side of the blade holder 124, as shown in FIGS. 2B and 4, a plate-shaped rack 130 having substantially the same length as the longitudinal direction of the blade holder 124 is arranged. The rack 130 receives the driving force of the first motor 152. A plurality of teeth that mesh with the pinion 158, which will be described later, are formed on the lower surface of the rack 130.

As shown in FIGS. 2A and 4, a plate-shaped rack 131 having substantially the same length as the longitudinal direction of the blade holder 124 is arranged on the right side of the blade holder 124. The rack 131 receives the driving force of the first motor 152. A plurality of teeth that mesh with the pinion 159, which will be described later, are formed on the lower surface of the rack 131.

As shown in FIG. 4, a sensor 134 for detecting the position of the removal unit 120 is provided on the left side of the rack 130, and a flag mounting plate 132 for detecting the position of the removal unit 120 in the front-rear direction is provided. .. A first flag 132a for detecting the movement of the wedge plate 122 from the standby position L1 to the removal position L2 is provided at the rear end of the flag mounting plate 132. A second flag 132b for detecting the arrival of the wedge plate 122 at the removal position L2 is provided at the front end portion of the flag mounting plate 132. The sensor 134 is composed of a transmissive sensor and detects the first flag 132a and the second flag 132b of the rack 130 moving in the front-rear direction. The detection signal detected by the sensor 134 is supplied to a control unit (not shown), and the control unit controls the operations of the first motor 152 and the second motor 192 based on the detection signal supplied from the sensor 134.

The first drive shaft 136 is located substantially in the middle between the tip end side and the base end side of the removing portion 120, and is engaged with the guide groove 113 of the left frame 112 and the guide groove 115 of the right frame 114, respectively. The first drive shaft 136 is inserted into the openings formed in each of the flag mounting plate 132, the rack 130, the blade holder 124, the crown holder 126, and the rack 131 from the left side to the right side of the housing 100. The spring 125 and the regulating portions 127a and 127b are arranged on the proximal end side of the crown holder 126 with respect to the first drive shaft 136.

The second drive shaft 138 is located at the base end of the removing portion 120 and is engaged with the guide groove 113 of the left frame 112 and the guide groove 115 of the right frame 114, respectively. The second drive shaft 138 is inserted into the openings formed in the flag mounting plate 132, the rack 130, the blade holder 124, and the rack 131 from the left side to the right side of the housing 100.

In this way, the wedge plate 122, the blade holder 124, the crown holder 126, the holder 128, the racks 130, 131, and the flag mounting plate 132 are assembled by the first drive shaft 136 and the second drive shaft 138 to remove the removal unit 120. It is configured so that it can be integrally moved forward and backward as a removing portion 120.

As shown in FIGS. 3 and 4, the holding portion 140 that regulates the movement of the paper bundle P and the staple S in the insertion direction is arranged on the rear side of the crown portion Sa at the removal position L2 and pushed by the wedge plate 122. It is configured so that it can come into contact with the crown portion Sa. The width of the pressing portion 140 is selected, for example, to a length that can support the crown portion Sa that moves from the front to the rear by the pushing force of the wedge plate 122 and that can be inserted into the groove portion 126a of the crown holder 126.

The presser holder 142 that supports the presser portion 140 is formed of a flat plate processed into a substantially U shape when viewed from above, and the rear end side of the presser holder 142 is rotatably supported by a shaft 146. One end of the tension spring 144 is attached further behind the shaft 146 of the holding holder 142. The other end of the tension spring 144 is attached to the left frame 112. A convex portion 142a capable of contacting the support portion 128b of the holder 128 is provided at the rear upper end portion of the holding holder 142.

As shown in FIGS. 2A, 2D, and 4, the first drive unit 150 includes the first motor 152, the gear 153a connected to the output shaft 152a of the first motor 152, and the like in the width direction of the housing 100. It has a pair of pinions 158 and 159 provided at both ends of the shaft 156, which are first pinion portions arranged at predetermined intervals to mesh with the racks 130 and 131. The plurality of gears 153a, 153b, 154a, 154b, and 155 form a reduction mechanism.

The first motor 152 has an output shaft 152a and a motor body 152b, and is composed of, for example, a DC motor, a DC brushless motor, or the like. By driving the first motor 152 based on an instruction from a control unit (not shown), the driving force of the first motor 152 is transmitted to the removal unit 120 via the reduction mechanism, and the removal unit 120 is moved forward or backward. Let me. As shown in FIGS. 2C, 2D, 3 and the like, the first motor 152 includes a removing portion 120 when the tip portion 122s of the wedge plate main body 122a (first portion) of the removing portion 120 is in the standby position L1. In the embodiment, it is arranged below the second part. The lower part of the removal unit 120 means that at least a part of the first motor 152 including the output shaft 152a is located directly below the removal unit 120.

The first motor 152 is arranged so that the output shaft 152a is parallel to or substantially parallel to the mounting surface 102a of the mounting table 102, as shown in FIGS. 2D and 3 and the like.

Further, the wedge plate 122 is arranged so as to be orthogonal to the moving direction from the front to the rear (longitudinal direction of the housing 100).

In the present embodiment, the fact that the output shaft 152a is parallel to the mounting surface 102a of the mounting table 102 means that the output shaft 152a is completely parallel. In addition, substantially parallel means to include a range slightly deviated from perfect parallelism.

As shown in FIGS. 2A, 2C, 2D and 2E, the gears 153a and 153b are two-stage drive gears, and the diameter of the gear 153a is larger than the diameter of the gear 153b. The gear 153a is connected to the output shaft 152a of the first motor 152. The gear 153b meshes with the gear 154a. The gears 154a and 154b are two-stage drive gears, and the diameter of the gear 154a is larger than the diameter of the gear 154b. The gear 154a meshes with the gear 153b, and the gear 154b meshes with the gear 155. At the center of the gear 155, the right end portion of the shaft 156 extending in the width direction of the housing 100 is attached. A pinion 159 that meshes with the rack 131 is attached to the right end side of the shaft 156 on the gear 155 side, and a pinion 158 that meshes with the rack 130 is attached to the left end side on the opposite side.

[Structure example of paper holding mechanism 160]
As shown in FIGS. 2A and 6 and the like, at least a part of the paper holding mechanism 160 for holding the paper bundle P mounted on the mounting table 102 is located above the mounting table 102 and is configured to be movable. It includes a paper retainer 170 and a second motor 192 that drives the paper retainer 170.

The paper holding portion 170 includes a hold lever 172 to which the parts constituting the paper holding portion are attached, a pair of paper holding racks 174 and 175 extending in the traveling direction at predetermined intervals in the width direction of the housing 100, and a mounting table. It has a paper holding plate 176 that holds the paper bundle P placed on the 102.

As shown in FIGS. 2A, 2E, 6 and the like, the hold lever 172 has a pair of flat plates 172a and 172b arranged on the rear side of the housing 100 and arranged at predetermined intervals in the width direction. ing. The lower side of the flat plates 172a and 172b is arranged inside the housing 100, and the upper side thereof is arranged so as to be exposed from the mounting table 102 and is covered with the cover portion 104. A boss 178 projecting outward is attached to the outer surface of the flat plate 172a. One end of the return spring 180 composed of a tension spring is attached to the boss 178, and the other end of the return spring 180 is attached to the left frame 112. Similarly, a boss (not shown) is attached to the outer surface of the flat plate 172b, one end of the return spring 181 is attached to this boss, and the other end of the return spring 181 is attached to the right frame 114.

The paper holding rack 174 is provided at the lower front end of the flat plate 172a of the hold lever 172. The paper retainer rack 174 is substantially fan-shaped and meshes with the paper retainer pinion 198. The paper holding rack 175 is provided at the lower front end of the flat plate 172b of the hold lever 172. The paper retainer rack 175 is substantially fan-shaped and meshes with the paper retainer pinion 199 of the second drive unit 190. The paper retainer racks 174 and 175 convert the rotational motion of the paper retainer pinions 198 and 199 into a substantially linear motion.

The paper holding plate 176 moves toward the mounting surface 102a so that the paper bundle P does not deviate from the removing position L2 of the mounting table 102 during the removal operation of the staple S, so that the mounting table 102 It is configured so that the paper bundle P placed on it can be pressed. The paper holding plate 176 is attached to the flat plates 172a and 172b so as to be parallel to or substantially parallel to the mounting table 102. Specifically, the left side surface of the paper holding plate 176 is supported by the shaft 186, and the right side surface of the paper holding plate 176 is supported by the shaft 187.

As shown in FIGS. 2B, 2C, 2D and 6, the second drive unit 190 includes the second motor 192, the gear 193a connected to the output shaft 192a of the second motor 192, and the housing 100. A pair of paper retainer pinions 198, 199 provided at both ends of the shaft 196, which are second pinion portions arranged at predetermined intervals so as to mesh with the paper retainer racks 174 and 175 in the width direction. Have. The plurality of gears 193a, 193b, 194a, 194b, 195 constitute a reduction mechanism. The second motor 192 is arranged below the removal unit 120 when it is located at the standby position L1.

The second motor 192 has an output shaft 192a and a motor body 192b, and is composed of, for example, a DC motor, a DC brushless motor, or the like. The second motor 192 is driven based on an instruction from a control unit (not shown) to transmit the driving force of the second motor 192 to the paper holding unit 170 via the reduction mechanism to operate the paper holding unit 170. As shown in FIGS. 2C, 2D, 3 and the like, the second motor 192 is behind the first motor 152, and the tip portion 122s of the wedge plate 122 of the removing portion 120 is in the standby position L1. The removal unit 120 in the case is arranged below the second unit in the present embodiment. The lower part of the removal unit 120 means that at least a part of the second motor 192 including the output shaft 192a is located directly below the removal unit 120.

The output shaft 192a of the second motor 192 is arranged so as to be parallel to or substantially parallel to the mounting surface 102a of the mounting table 102, as shown in FIGS. 2D and 3 and the like.

Further, the wedge plate 122 is arranged so as to be orthogonal to the moving direction from the front to the rear (longitudinal direction of the housing 100).

Further, the output shaft 192a of the second motor 192 is arranged so as to face the direction opposite to the output shaft 152a of the first motor 152. Specifically, the output shaft 152a of the first motor 152 is arranged so as to face the right direction, and the output shaft 192a of the second motor 192 is arranged so as to face the opposite side to the left. The opposite direction means that the output shafts 152a and 192a are oriented 180 degrees opposite to each other and also include a range slightly deviated from the 180 degrees opposite direction.

In the present embodiment, the fact that the output shaft 192a is parallel to the mounting surface 102a of the mounting table 102 means that the output shaft 192a is completely parallel. Further, substantially parallel means a case where the range is slightly deviated from the perfect parallel.

As shown in FIGS. 2B, 2C, 2D, 2E and 6, the gears 193a and 193b are two-stage drive gears, and the diameter of the gear 193a is larger than the diameter of the gear 193b. The gear 193a is connected to the output shaft 192a of the second motor 192. The gear 193b meshes with the gear 194a. The gears 194a and 194b are two-stage drive gears, and the diameter of the gear 194a is larger than the diameter of the gear 194b. The gear 194a meshes with the gear 193b, and the gear 194b meshes with the gear 195. At the center of the gear 195, the left end portion of the shaft 196 extending in the width direction of the housing 100 is attached. A paper holding pinion 198 that meshes with the paper holding rack 174 is attached to the left end side of the shaft 196 on the gear 195 side, and a paper holding pinion 199 that meshes with the paper holding rack 175 is attached to the right end side on the opposite side.

[Structure example of accommodating portion 200]
As shown in FIGS. 2A, 2B, 3 and the like, the accommodating portion 200 is removed by the tip portion 122s of the wedge plate 122 constituting the removing portion 120 so that the staple S falling from the paper bundle P can be accommodated. It is located below the removal section 120 when it is at position L2. Further, the accommodating portion 200 is arranged between the flat plates 172a and 172b of the hold lever 172 constituting the paper pressing mechanism 160, and is arranged in an empty space below the pressing holder 142 constituting the staple removing mechanism 110.

[Configuration example of left frame 112, etc.]
FIG. 7 is a diagram showing an internal configuration of the staple removing device 1A including the left frame 112, the right frame 114, the front frame 116, and the rear frame 117. FIG. 8 is an exploded perspective view of the staple removing device 1A shown in FIG. 7.

A left frame 112, a right frame 114, a front frame 116, and a rear frame 117 are erected on the outer peripheral portions of the staple removing mechanism 110 and the paper holding mechanism 160 so as to surround them.

The left frame 112 is erected on the left side of the staple removing mechanism 110. A guide groove 113 extending in the moving direction (longitudinal direction of the housing 100) is formed in the upper portion of the left frame 112 in front of or behind the removing portion 120. The guide groove 113 is a first groove 113a for locating the tip portion 122s of the wedge plate 122 of the removing portion 120 waiting at the standby position L1 below the mounting table 102, and the wedge plate 122 of the removing portion 120. It includes a second groove 113b for moving the tip portion 122s from the front side of the removal position L2 in a state of protruding from the mounting table 102 until it passes through the removal position L2. The position before the removal position L2 includes a position between the standby position L1 and the removal position L2.

The first groove 113a is formed so that the second drive shaft 138 is closer to the mounting base 102 than the first drive shaft 136 when the tip portion 122s of the removal portion 120 is at least in the standby position L1. The first groove 113a extends in parallel along the mounting surface 102a of the mounting table 102 by a predetermined distance from the start end of the moving section of the removing portion 120. The second groove 113b is formed at a position slightly lower than the first groove 113a via the stepped portion 113c. The second groove 113b extends in parallel along the mounting surface 102a of the mounting table 102 from the step portion 113c to the end of the moving section of the wedge plate 122. The left end portions of the first drive shaft 136 and the second drive shaft 138 of the removal portion 120 are inserted into the guide groove 113. As a result, the removing portion 120 can move along the guide groove 113, and can move from the front and the rear along the mounting table 102.

The right frame 114 is erected on the right side of the staple removing mechanism 110. A guide groove 115 extending in the moving direction (longitudinal direction of the housing 100) is formed in the upper part of the right frame 114 in front of or behind the removing portion 120. The guide groove 115 is a first groove 115a for locating the tip portion 122s of the wedge plate 122 of the removing portion 120 waiting at the standby position L1 below the mounting table 102, and the wedge plate 122 of the removing portion 120. It includes a second groove 115b for moving the tip portion 122s from the front side of the removal position L2 in a state of protruding from the mounting table 102 until it passes through the removal position L2.

The second groove 115b is formed so that the second drive shaft 138 is closer to the mounting table 102 than the first drive shaft 136 when the tip portion 122s of the removal portion 120 is at least in the standby position L1. The second groove 115b extends in parallel along the mounting surface 102a of the mounting table 102 by a predetermined distance from the start end of the moving section of the removing portion 120. The second groove 115b is formed at a position slightly lower than the first groove 115a via the stepped portion 115c. The second groove 115b extends in parallel along the mounting surface 102a of the mounting table 102 from the step portion 115c to the end of the moving section of the wedge plate 122. The right end portions of the first drive shaft 136 and the second drive shaft 138 of the removal portion 120 are inserted into the guide groove 115. As a result, the removing portion 120 can move along the guide groove 115, and can move forward and backward along the mounting table 102.

The front frame 116 is erected on the front side of the staple pulling mechanism 110, and the rear frame 117 is erected on the rear side of the paper holding mechanism 160.

[Operation example of staple removal mechanism 110]
Next, an example of the operation of the staple removing mechanism 110 when the staple S is removed from the paper bundle P will be described.

FIG. 9A is a perspective view showing the operation of the staple removing mechanism 110 at the standby position L1, and FIG. 9B is a perspective view showing the operation of the staple removing mechanism 110 moving to the removal position L2. FIG. 10A is a side view of the main part showing the operation of the staple removing mechanism 110 at the standby position L1, and FIG. 10B is a side view of the main part showing the operation of the staple removing mechanism 110 moving to the removal position L2. FIG. 11A is a side view showing the operation of the staple removing mechanism 110 at the standby position L1, and FIG. 11B is a side view of a main part showing the operation of the staple removing mechanism 110 of FIG. 11A. 12A is a side view showing the operation of the staple removing mechanism 110 moving to the removal position L2, and FIG. 12B is a side view of a main part showing the operation of the staple removing mechanism 110 of FIG. 12A. In FIGS. 11 and 12, for convenience, only the left frame 112 side will be described, but the same operation as the left frame 112 side can be adopted for the right frame 114 side on the opposite side.

When the staple removing device 1A is in the standby state, the wedge plate 122 is stopped at the standby position L1 of the housing 100, as shown in FIGS. 9A, 10A, and 11A. At this time, the second drive shaft 138 is located in the first groove 113a of the guide groove 113 of the left frame 112, and the first drive shaft 136 is located in the second groove 113b of the guide groove 113 of the left frame 112. Therefore, the mounting portion 122b side of the wedge plate 122 is in a raised state, and the wedge plate main body 122a side including the tip portion 122s of the wedge plate 122 is at a lower position than the mounting portion 122b side. As a result, as shown in FIG. 11B, when the tip portion 122s of the removing portion 120 is in the standby position L1, the wedge plate main body 122a including the tip portion 122s of the wedge plate 122 is lower than the mounting surface 102a of the mounting base 102. Located in. As a result, when the paper bundle P is placed on the mounting table 102, it is possible to prevent a problem that the wedge plate 122 hits the paper bundle P and is separated from the mounting table.

When the start switch 106 of the staple removing device 1A is operated, the first motor 152 is driven as shown in FIGS. 9B and 10B, and the driving force of the first motor 152 is the plurality of gears 153a, 153b, 154a, It is transmitted to the pinions 158 and 159 via 154b and 155. Along with this, the pinions 158 and 159 rotate clockwise in FIG. 10B, and the racks 130 and 131 meshing with the pinions 158 and 159 move from the front to the rear along the mounting table 102 so that the wedge plate 122 moves forward. Move backwards from.

At this time, as shown in FIG. 12A, the second drive shaft 138 moves from the first groove 113a of the guide groove 113 of the left frame 112 to the second groove 113b. The second drive shaft 138 is parallel to and at the same height as the mounting surface 102a of the mounting base 102 with the first drive shaft 136. Therefore, as the position of the wedge plate 122 on the mounting portion 122b side is lowered, the wedge plate main body 122a side of the wedge plate 122 is lifted with the first drive shaft 136 as a fulcrum. Here, since the upper surface of the wedge plate main body 122a has a structure slightly protruding from the upper surface of the mounting portion 122b, as shown in FIG. 12B, the tip portion 122s of the wedge plate 122 is the mounting surface of the mounting base 102. It is located above 102a. In the present embodiment, the wedge plate 122 protrudes from the mounting surface 102a of the mounting table 102 through the opening 102b of the mounting table 102 from the front side of the removing position L2 until it passes through the removal position L2. Move while maintaining. As a result, the tip portion 122s of the wedge plate main body 122a is surely pushed between the paper bundle P and the crown portion Sa.

[Operation example of paper holding mechanism 160]
Next, an example of the operation of the paper holding mechanism 160 when the staple S is removed from the paper bundle P will be described.

FIG. 13A is a perspective view showing the operation of the paper holding mechanism 160 in the standby position, and FIG. 13B is a perspective view showing the operation of the paper holding mechanism 160 moving to the pressing position. FIG. 14A is a side view of a main part showing the operation of the paper holding mechanism 160 in the standby position, and FIG. 14B is a side view of the main part showing the operation of the paper holding mechanism 160 moving to the pressing position.

As shown in FIGS. 13A and 14A, when the staple removing device 1A is in the standby position, the paper holding plate 176 is stopped at a position at a certain interval from the mounting surface 102a of the mounting table 102. The constant interval is an interval at which the lower surface of the paper holding plate 176 does not come into contact with the uppermost layer of the paper bundle P placed on the mounting table 102.

When the start switch of the staple removing device 1A is turned on, the second motor 192 is driven. The driving force of the second motor 192 is transmitted to the paper holding pinions 198 and 199 via the gears 193a, 193b, 194a, 194b and 195. Along with this, as shown in FIGS. 13B and 14B, the paper retainer pinions 198 and 199 rotate clockwise, and the paper retainer racks 174 and 175 meshing with the paper retainer pinions 198 and 199 move substantially downward. When the paper holding racks 174 and 175 move substantially downward, the hold lever 172 rotates counterclockwise with the hold lever shaft 182 as a fulcrum against the elastic force of the return spring 180, and the paper holding plate 176 is placed on the mounting base 102. Moves (descends) in the direction approaching. As a result, the paper bundle P placed on the mounting table 102 is pressed by the paper holding plate 176 with a constant pressing force.

When the operation of removing the staple S from the paper bundle P is completed, the second motor 192 is driven in the reverse rotation. As a result, the paper holding plate 176 moves (rises) in the direction away from the paper bundle P and returns to the standby position shown in FIG. 14A or the like.

[Operation example of staple removal device 1A]
Next, the operation of the staple removing device 1A when the staple S is pulled out from the paper bundle P will be described. Since the operations of the staple removing mechanism 110 and the paper holding mechanism 160 are the same as those in FIGS. 9A and 13A, detailed description thereof will be omitted.

15A to 15G are side views showing an example of the operation of the staple removing device 1A when the staple S is pulled out from the paper bundle P. 16A to 16E are enlarged views of a main part showing an example of the operation of the wedge plate 122 when the staple S is pulled out from the paper bundle P. 17A to 17E are views showing the states of the wedge plate 122 and the staple S when the staple S is pulled out from the paper bundle P. In the description of FIG. 15A and the like, for convenience, only the operation on the right side of the staple removing device 1A will be described, but the same operation as on the right side can be adopted for the opposite left side.

As shown in FIG. 15A, when removing the staple S from the paper bundle P, first, the paper bundle P bound by the staple S is placed on the mounting table 102. The user aligns the paper bundle P with the mark indicating the removal position L2 provided on the mounting table 102, and mounts the staple S with the crown portion Sa side facing the mounting table. As shown in FIG. 17A, the paper bundle P is bound by staples S. The legs Sb, Sb of the staple S penetrate the paper bundle P in the thickness direction of the paper, are bent inward, and bite into the paper surface.

Next, when the start switch 106 of the staple removal device 1A is pressed by the user, the second motor 192 drive is started. As a result, as shown in FIG. 15B, the paper holding plate 176 moves (descends) in the direction approaching the mounting table 102, and the paper bundle P is pressed by the paper holding plate 176 with a constant pressing force.

Subsequently, after a predetermined time has elapsed from the start of driving the second motor 192, the first motor 152 is driven. As a result, the pinion 159 rotates clockwise, so that the removing portion 120 including the rack 131 and the wedge plate 122 moves from the front to the rear. At the start of movement from the front to the rear of the removing portion 120, the tip portion 122s of the wedge plate main body 122a is positioned below the mounting surface 102a of the mounting base 102, as shown in FIG. 16A, as in the standby position L1. doing.

When the tip side of the removing portion 120 moves from the front to the rear in front of the removing position L2, the second drive shaft 138 of the removing portion 120 moves to the second groove 115b of the guide groove 115, so that the wedge is shown in FIG. 16B. The tip portion 122s of the plate 122 projects from the mounting surface 102a through the opening 102b of the mounting base 102. The upper surface of the wedge plate 122 comes into contact with the back surface of the lowermost layer of the paper bundle P, and moves from the front to the rear while pressing the paper bundle P.

When the tip end side of the wedge plate 122 moves to the removal position L2, it is pushed between the crown portion Sa and the paper bundle P as shown in FIGS. 15C and 16C. At this time, as shown in FIG. 17B, the legs Sb and Sb of the staple S go from the state where they bite into the paper surface of the paper bundle P to the state where they are substantially parallel to the paper surface of the paper bundle P. When the wedge plate 122 further moves from the front to the rear in this state, the convex portion 142a of the holding holder 142 comes off from the supporting portion 128b of the holder 128, as shown in FIG. 16D. As a result, the pressing portion 140 rises due to the urging of the tension spring 144, and comes into contact with the crown portion Sa of the paper bundle P that moves from the front to the rear by the pushing force of the wedge plate 122, so that the staple S moves forward. regulate.

When the tip end side of the wedge plate 122 passes through the removal position L2, as shown in FIGS. 15D and 16E, the thickness of the wedge plate 122 pushed between the paper bundle P and the crown portion Sa at the removal position is increased in the side view. It gets thicker. Due to the extension of the tension spring 144, the pressing portion 140 is lowered in contact with the wedge plate 122 and the crown portion Sa following the thickness direction of the wedge plate 122. As a result, as shown in FIG. 17C, the crown portion Sa is pushed by the wedge plate 122 in the direction away from the paper bundle P, and the legs Sb and Sb of the staple S bent inward with respect to the paper surface of the paper bundle P. Extends so as to be substantially orthogonal. As shown in FIG. 15E, when the thickness of the wedge plate 122 in the side view at the removal position L2 is further increased, the legs Sb and Sb of the staple S are pulled out from the paper bundle P as shown in FIG. 17D. However, since the legs Sb and Sb are caught on the side surface of the wedge plate 122 due to the springback of the staple S, the staple S does not fall at this stage.

As shown in FIG. 15F, when the wedge plate 122 moves from the front to the rear to the end position of the movement range, the constricted portion 122c of the wedge plate 122 is located at the removal position L2. As a result, as shown in FIG. 17E, the width dimension D1 of the constricted portion 122c of the wedge plate 122 is narrower than the width dimension D3 between the leg portions Sb and Sb of the staple S that springs back, so that the leg of the staple S The portions Sb and Sb are separated from the side surface of the wedge plate 122, and the staple S falls into the accommodating portion 200.

As shown in FIG. 15G, when the removal of the staple S from the paper bundle P is completed, the first motor 152 is driven in the reverse rotation. Along with this, the pinion 159 rotates counterclockwise, the removal unit 120 including the rack 131 and the wedge plate 122 moves from the rear to the front along the mounting table 102, and the removal unit 120 moves from the removal position L2 to the standby position. Return to L1. Further, after a predetermined time has elapsed from the reverse rotation of the first motor 152, the second motor 192 is driven by the reverse rotation. Along with this, the paper holding pinion 199 rotates counterclockwise, and the paper holding rack 175 moves substantially upward, so that the paper holding plate 176 moves away from the mounting table 102 via the hold lever 172. Return to the standby position.

[Example of operation of the removing unit 120 according to the wire diameter of the staple S]
First, a case where a staple S having a small wire diameter (thin) is used will be described. 18A to 18C are schematic views showing an operation example of the removing unit 120 when the staple S is removed from the paper bundle P bound by the staple S having a small wire diameter (thin). In FIG. 18A and the like, the wedge plate 122 and the blade holder 124 are shown integrally for convenience.

As shown in FIG. 18A, before the wedge plate 122 reaches the removal position L2, the tip end side of the crown holder 126 is in contact with the lower surface of the wedge plate 122 due to the urging of the spring 125, and the tip end portion of the wedge plate 122. The 122s and the tip end side of the crown holder 126 are in a closed state.

When the removing portion 120 moves from the front to the rear and reaches the removing position L2, the crown portion Sa of the staple S is inserted between the wedge plate 122 and the crown holder 126 as shown in FIG. 18B. At this time, the tip end side of the crown holder 126 is pushed away from the wedge plate 122 against the elastic force of the spring 125, and is opened by the opening amount W1 with respect to the tip end portion 122s of the wedge plate 122.

Subsequently, when the removing portion 120 further moves from the front to the rear, as shown in FIG. 18C, the thickness of the wedge plate 122 between the paper bundle P and the crown portion Sa gradually increases, and the leg portion Sb of the staple S becomes thicker. Stands away from the paper surface of the paper bundle P. At this time, since the load of the spring 125 is set according to the staple S having a small wire diameter, the staple S can be slid while being sandwiched between the wedge plate 122 and the crown holder 126, and can be slid together with the wedge plate 122 from the front. It does not move backwards.

Next, a case where a staple S having a large wire diameter is used will be described. 19A to 19C are schematic views showing an operation example of the removing unit 120 when the staple S is removed from the paper bundle P bound by the (thick) staple S having a large wire diameter. In FIG. 19A and the like, the wedge plate 122 and the blade holder 124 are shown integrally for convenience.

As shown in FIG. 19A, the tip end side of the crown holder 126 is in contact with the lower surface of the wedge plate 122 due to the urging of the spring 125, and the tip end portion 122s of the wedge plate 122 and the tip end side of the crown holder 126 are closed. Is.

When the removing portion 120 moves from the front to the rear and reaches the removing position L2, the crown portion Sa of the staple S is inserted between the wedge plate 122 and the crown holder 126 as shown in FIG. 19B. At this time, the tip end side of the crown holder 126 is pushed in a direction away from the wedge plate 122 against the elastic force of the spring 125, and is opened by the opening amount W2 with respect to the tip end portion 122s of the wedge plate 122. The opening amount W2 corresponds to the preset value set in advance, and is an opening amount that can be held with an optimum load without opening the crown holder 126 too much when, for example, a staple S having a large wire diameter is inserted.

In the present embodiment, when the crown holder 126 is opened by the set value of the opening amount W2, the regulating portions 127a and 127b are in contact with the lower surface 124a of the blade holder 124, and the tip side of the crown holder 126 is not opened by the opening amount W2 or more. Is regulated by.

Subsequently, when the removing portion 120 further moves from the front to the rear, as shown in FIG. 19C, the thickness of the wedge plate 122 between the paper bundle P and the crown portion Sa gradually increases, and the leg portion Sb of the staple S becomes thicker. Stands away from the paper surface of the paper bundle P. At this time, since the regulating portions 127a and 127b are maintained in contact with the lower surface 124a of the blade holder 124, the tip side of the crown holder 126 does not open more than the opening amount W2, and the staple S is held by the crown holder 126. It becomes possible to hold down.

As described above, according to the present embodiment, the load of the spring 125 is set according to the staple S having a small wire diameter, and the crown holder 126 is prevented from opening more than the set value by using the regulating portions 127a and 127b. It is configured in. As a result, for example, even when a staple S having a large wire diameter is used, it is possible to prevent the crown holder 126 from opening more than the set value by the regulating portions 127a and 127b, and the crown portion Sa can be prevented by the constant load of the crown holder 126. Can be held down. As a result, it is possible to prevent one leg Sb of the staple S from coming off the paper bundle P first during the removal operation, and it is possible to prevent defective removal. Further, even when the staple S having a small wire diameter is used, the crown portion Sa can be pressed by the optimum load by the crown holder 126 by the spring 125 set according to the staple S having a small wire diameter. As a result, it is possible to prevent defective removal such as the paper being torn due to the crown portion Sa being dragged by moving from the front to the rear of the wedge plate 122 or the like. Therefore, according to the present embodiment, even when various types of staples S such as staples S having a large wire diameter and staples S having a small wire diameter are used, the staples S can be reliably removed from the paper bundle P. .. Further, since it is not necessary to change the removal operation or the removal mechanism according to the type of staple S, it is possible to improve the efficiency of the removal operation and reduce the cost of the apparatus.

<Other Embodiment 1>
In the other embodiment 1, the configuration of the crown holder 226 and the like are different from the configuration and the like of the crown holder 126 of the above embodiment. Since other configurations and operations of the staple removing device 1B of the other embodiment 1 are the same as those of the above embodiment, detailed description thereof will be omitted.

[Structure example of removal unit 120 including crown holder 226 and the like]
20A to 20C are schematic views of a removing portion 120 including a crown holder 226 of the staple removing device 1B according to another embodiment 1. In FIG. 20A and the like, the wedge plate 122 and the blade holder 124 are shown integrally for convenience. Further, in the following, it is assumed that the staple S having a large wire diameter is used and the opening amount W2 is set to the wire diameter of the staple S used.

The removing portion 120 constituting the staple removing device 1B includes a wedge plate 122, a blade holder 124, a crown holder 226, and a crown holder stopper 230.

The crown holder 226 is composed of, for example, a leaf spring, and holds a crown portion Sa inserted between the wedge plate 122 and the crown holder 226. The base end portion of the crown holder 226 is attached to a substantially central portion of the crown holder stopper 230. The tip end side of the crown holder 226 is urged toward the wedge plate 122 side and is pressed against the lower surface of the wedge plate 122. In the present embodiment, the load of the crown holder 226 is set according to the staple S having a smaller wire diameter among the staples S to be used.

The crown holder stopper 230 is arranged below the crown holder 226, and regulates the opening amount of the crown holder 226 so that the crown holder 226 does not open more than a set value with respect to the wedge plate 122. The tip end side of the crown holder 226 is arranged at a certain distance from the lower surface of the wedge plate 122 facing the crown holder 226. The constant interval is an interval obtained by adding the thickness of the crown holder 226 and the wire diameter of the crown portion Sa. The base end side of the crown holder stopper 230 is in contact with the lower surface of the blade holder 124.

[Operation example of the removing unit 120 including the crown holder 226 and the like]
Next, an operation example of the removing unit 120 including the crown holder 226 of the staple removing device 1B according to the other embodiment 1 will be described with reference to FIGS. 20A to 20C.

As shown in FIG. 20A, the tip end side of the crown holder 226 is pressed against the lower surface of the wedge plate 122 before the wedge plate 122 of the removing portion 120 reaches the removal position L2.

As shown in FIG. 20B, when the wedge plate 122 moves from the front to the rear and reaches the removal position L2, the tip portion 122s of the wedge plate 122 is inserted between the paper bundle P and the crown portion Sa of the staple S. .. At this time, the crown holder 226 moves in a direction away from the lower surface of the wedge plate 122 against the elastic force, and opens by an opening amount W2 according to the wire diameter of the crown portion Sa. In another embodiment 1, since the base end side of the crown holder stopper 230 abuts on the lower surface of the blade holder 124 and is regulated, the tip end side of the crown holder 226 does not open more than the opening amount W2.

As shown in FIG. 20C, even if the wedge plate 122 is further moved from the front to the rear, the opening amount of the crown holder 226 is regulated by the crown holder stopper 230, so that the open state is maintained by the opening amount W2. ..

As described above, the same effect as that of the above-described embodiment can be obtained by the other embodiment 1. That is, according to another embodiment 1, even when various types of staples S such as staples S having a large wire diameter and staples S having a small wire diameter are used, the staples S are surely removed from the paper bundle P. Can be done.

<Other Embodiment 2>
In the other embodiment 2, the configuration of the crown holder 326 and the like are different from the configuration and the like of the crown holder 126 of the above embodiment. Since other configurations and operations of the staple removing device 1C of the other embodiment 1 are the same as those of the above embodiment, detailed description thereof will be omitted.

[Structure example of removal unit 120 including crown holder 326 and the like]
21A to 21C are schematic views of a removing portion 120 including a crown holder 326 of the staple removing device 1C according to another second embodiment. In the following, it is assumed that, for example, a staple S having a large wire diameter is used, and the opening amount W2 is set corresponding to the wire diameter of the staple S used.

The removing portion 120 constituting the staple removing device 1C includes a wedge plate 122, a wedge plate holder 300, and a crown holder 326.

The wedge plate holder 300 is a box body whose rear side is open, and accommodates each of the proximal end side of the wedge plate 122 and the proximal end side of the crown holder 326.

A compression spring 302 is arranged between a portion of the crown holder 326 near the first drive shaft 136 and the inner bottom surface of the wedge plate holder 300. The load of the compression spring 302 is set according to the staple S having a smaller wire diameter among the staples S used.

The crown holder 326 is urged toward the wedge plate 122 by the compression spring 302 and is pressed against the lower surface of the wedge plate 122. A shaft opening 326a through which the first drive shaft 136 is inserted is formed at a substantially intermediate position in the longitudinal direction of the crown holder 326. The shaft opening 326a is composed of an elongated hole having a long axis in the vertical direction. As a result, the crown holder 326 can move in the vertical direction with respect to the first drive shaft 136 along the shaft opening 326a. A fulcrum shaft 304 is inserted through the base end portion of the crown holder 326, and each of both end portions of the fulcrum shaft 304 is supported on the left and right side surfaces inside the wedge plate holder 300.

Next, the operation of the crown holder 326 of the removing unit 120 constituting the staple removing device 1C will be described with reference to FIGS. 21A to 21C.

As shown in FIG. 21A, the tip end side of the crown holder 226 is pressed against the lower surface of the wedge plate 122 until the wedge plate 122 of the removing portion 120 reaches the removal position L2.

As shown in FIG. 21B, when the wedge plate 122 moves from the front to the rear and passes through the removal position L2, the tip portion 122s of the wedge plate 122 is inserted between the paper bundle P and the crown portion Sa of the staple S. .. At this time, the crown holder 326 moves in a direction away from the lower surface of the wedge plate 122 against the elastic force of the compression spring 302. In another embodiment 2, when the crown holder 326 is opened by the opening amount W2, the upper end opening edge of the shaft opening 326a of the crown holder 326 comes into contact with the first drive shaft 136, and the crown holder 326 moves downward. Be regulated. As a result, the crown holder 326 does not open with respect to the wedge plate 122 by an opening amount W2 or more.

As shown in FIG. 21C, even if the wedge plate 122 further moves from the front to the rear, the opening amount of the crown holder 326 is regulated by the shaft opening 326a and the first drive shaft 136, so that only the opening amount W2 is opened. The state is maintained.

As described above, the same effect as that of the above-described embodiment can be obtained by the other embodiment 2. That is, according to the other embodiment 2, even when various types of staples S such as staples S having a large wire diameter or staples S having a small wire diameter are used, the staples S are surely removed from the paper bundle P. Can be done.

<Other Embodiment 3>
In the other embodiment 3, the configuration of the wedge plate 122 and the like are different from the configuration and the like of the wedge plate 122 of the above embodiment. Since other configurations and operations of the staple removing device 1D of the other embodiment 1 are the same as those of the above embodiment, detailed description thereof will be omitted.

[Structure example of removal unit 120]
FIG. 22 is an exploded perspective view of the removal unit 120 of the staple removal device 1D according to the third embodiment. 23A is a plan view of the removal unit 120 of the staple removal device 1D according to the third embodiment, FIG. 23B is a side view of the removal unit 120 shown in FIG. 23A, and FIG. 23C is a CC of the removal unit 120 shown in FIG. 23A. It is a cross-sectional view along the line.

The removing portion 120 constituting the staple removing device 1D includes a wedge plate 122, a blade holder 124, and a crown holder 126. The wedge plate 122 has a wedge plate main body 122a, a mounting portion 122b, a constricted portion 122c, and a convex portion 122e.

The convex portion 122e is provided on the lower surface of the wedge plate 122, and prevents the crown portion Sa from skidding when the crown portion Sa of the staple S inserted between the wedge plate 122 and the crown holder 126 is held. The convex portion 122e is composed of linear protrusions extending along the longitudinal direction of the wedge plate main body 122a, and is arranged at a substantially central portion in the width direction of the crown holder 126. The gap D between the lower surface of the convex portion 122e and the upper surface of the crown holder 126 is selected to be equal to or smaller than the wire diameter of the staple S to be used. The tip end side of the convex portion 122e is formed so that the thickness of the side surface gradually decreases toward the tip end side so as not to collide with the crown portion Sa inserted between the wedge plate 122 and the crown holder 126. The cross-sectional shape of the convex portion 122e is not limited to a rectangular shape, and may be a shape such as a semicircular shape.

[Operation example of the removing portion 120 including the wedge plate 122]
24A and 24B are enlarged views of a main part of the wedge plate 122, the staple S, and the crown holder 126 when the staple S is removed from the paper bundle P.

When the wedge plate 122 of the removing portion 120 reaches the removing position L2, the tip portion 122s of the wedge plate 122 is inserted between the paper bundle P and the crown portion Sa of the staple S, as shown in FIG. 24A. At this point, the crown portion Sa is held by the lower surface of the wedge plate 122.

When the wedge plate 122 further moves from the front to the rear, as shown in FIG. 24B, the convex portion 122e of the wedge plate 122 also enters between the crown portion Sa and abuts on the crown portion Sa. As a result, the three points of the opening edges 126a1 and 126a2 at both ends of the groove portion 126a of the crown holder 126 and the convex portion 122e are in a state of biting into the crown portion Sa, and the wedge plate 122 and the crown holder 126 move from the front to the rear. The side slip of the crown portion Sa at the time is prevented.

As described above, according to the other embodiment 3, the crown portion Sa can be made to bite into the opening edges 126a1 and 126a2 at both ends of the convex portion 122e of the wedge plate 122 and the groove portion 126a of the crown holder 126. It is possible to reliably prevent the side slip of the crown portion Sa when the plate 122 is moved from the front to the rear. As a result, it is possible to prevent defective removal such as one leg Sb of the staple S coming off the paper bundle P first.

The technical scope of the present invention is not limited to the above-described embodiment, and includes various modifications to the above-described embodiment without departing from the spirit of the present invention. For example, the staple removing device 1A or the like according to the above embodiment can be mounted on an image forming device that forms an image on paper. In this case, the staple removing device 1A or the like according to the present embodiment may be arranged at a position adjacent to the operation panel of the image forming apparatus, or may be inside the image forming apparatus or a post-processing apparatus connected to the image forming apparatus. It may be placed inside the. Further, the side surface of the wedge plate 122 may be formed by an inclined surface whose width in the left-right direction becomes narrower from the upper side to the lower side instead of the constricted portion 122c. At this time, the width of the wedge plate 122 in the left-right direction is formed so as to be narrower than the width dimension D3 between the legs Sb and Sb of the staple S.

1A, 1B, 1C, 1D Staple removal device 102 Mounting stand 120 Removal part 122 Wedge plate 125 Spring (biased part)
126,226,326 Crown holder (holding part)
127a, 127b Regulation unit 136 1st drive shaft (rotation shaft)
152 First motor (motor)
176 Paper holding plate (paper holding part)
S Staple P Paper bundle W1, W2 Opening amount

Claims (6)

A mounting table on which a bundle of paper bound by staples is placed,
It is located below the above-mentioned stand and includes a tip portion that can be inserted between the paper bundle and the staple, and the tip portion is inserted between the paper bundle and the crown portion of the staple. A removal unit that removes the staples from the stack of paper,
A motor for moving the removal unit is provided.
The removal part
A staple removing device that holds the crown portion of the staple that is removed from the paper bundle by the removing portion, and has a holding portion that is configured such that one end side can be opened and closed relative to the tip portion of the removing portion. .. The removal part
The staple removing device according to claim 1, further comprising an urging portion that urges the tip portion of the removing portion and one end side of the holding portion to approach each other. The removal part
The staple removing device according to claim 1 or 2, further comprising a regulating portion that regulates the amount of opening between the tip portion of the removing portion and one end side of the holding portion. The removal part
A rotation shaft is provided between one end side and the other end side of the holding portion.
The staple removing device according to any one of claims 1 to 3, wherein the holding portion opens and closes with respect to the tip portion of the removing portion with the rotating shaft as a fulcrum on one end side. The staple removing device according to claim 4, wherein the urging portion and the regulating portion are arranged on the other end side of the holding portion with respect to the rotating shaft. The staple removing device according to claim 4 or 5, wherein the restricting portion regulates the opening amount by abutting on the removing portion by rotating around the rotating shaft as a fulcrum.

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