JP2024002917A - Staple removal device and staple removal tool and image formation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a staple removal device which has a small number of components and a simple structure, is compact, and can remove staples from a paper bundle, including a saddle-stitched book, without fail, and to provide a staple removal tool and an image formation device.

SOLUTION: A staple removal device 1 drives an insertion claw 20 inserted between a staple and a paper surface in a removal direction and holds the staple between the insertion claw 20 and a staple presser 30 to remove the staple from a paper bundle. After the staple is removed from the paper bundle, the insertion claw 20 is driven in an open direction to release the staple held by the insertion claw 20 and the staple presser 30.

SELECTED DRAWING: Figure 2

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a staple removing device, a staple extracting tool, and an image forming apparatus that remove staples from a bundle of sheets created by binding a plurality of sheets using staples.

In a typical electric staple removal device, after pressing the paper near the staple, an insertion claw is inserted between the paper stack and the staple, and the staple is removed from the paper stack. For example, a binding member removal device is described that includes a pressing means having a contact portion that is brought into contact with the upper surface of the paper stack, and an insertion member that is inserted between the paper stack and a staple that binds the paper stack. (Patent Documents 1 to 3).

Japanese Patent Application Publication No. 2020-78844 JP2020-78845A JP 2021-24076 Publication

By the way, when the tip of the moving part is inserted between the paper stack and the staple, the paper stack and the staples are pushed in the insertion direction of the tip due to the pushing force of the tip, but in order to prevent this, The number of parts constituting the holding means and the like is large and complicated, leading to problems such as an increase in the size of the device. Furthermore, these configurations cannot be used to disassemble a saddle-stitched genuine article that is bound near the center of the paper.

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a staple removal device that has a small number of parts, has a simple configuration, is compact, and is capable of reliably removing staples from bundles of paper including saddle-stitched originals. Another object of the present invention is to provide a staple extractor and an image forming apparatus.

In order to solve the above problems and achieve the objects, the present invention was constructed as follows.

The invention according to claim 1 includes:
A staple removal device that removes staples from a stack of sheets bound with staples,
an insertion claw that can be inserted between the staple and the paper surface when the paper stack is placed;
A staple holder that can hold staples,
a driving means for driving the insertion claw and the staple holder;
The driving means includes:
driving the insertion claw inserted between the staple and the paper surface in an outward direction, and pinching the staple between the insertion claw and the staple holder and separating it from the paper stack;
The staple removing device is characterized in that, after separating the staple from the paper bundle, the insertion claw is driven in a release direction to release the staple from being held between the insertion claw and the staple holder.

The invention according to claim 2 is characterized in that the driving means comprises:
a drive shaft part that drivably supports the insertion claw;
a link mechanism that drives the drive shaft portion;
an electric drive source that drives the link mechanism,
The electric drive source is arranged along the central longitudinal direction of the device main body,
driving the insertion claw in the removal direction by the electric drive source via the link mechanism and the drive shaft portion, and separating the staple from the paper stack by sandwiching the staple between the insertion claw and the staple holder;
After the staple is separated from the paper bundle, the insertion claw is driven in a releasing direction via the link mechanism and the drive shaft portion to release the staple from being held between the insertion claw and the staple holder. 2. The staple removal device according to claim 1.

The invention according to claim 3 is
In an initial state, a regulating part is provided that forms a gap between the insertion claw and the staple holder,
The regulation department is
a casing that supports the staple holder;
a support shaft connected to the staple holder;
a regulating hole formed in the housing and movably supporting the support shaft between a lower hole position and an upper hole position;
a biasing means for always biasing the support shaft in the direction of the lower hole position via the staple holder;
the support shaft forms a gap between the insertion claw and the staple holder at the lower hole position;
the support shaft moves along the regulation hole and pinches the staple between the insertion claw and the staple holder and separates it from the paper stack;
The support shaft is reversed from the upper hole position, and the insertion claw and the staple holder move toward the lower hole position,
The movement of the support shaft is regulated by the regulation hole at the lower hole position, and the insertion claw moves to form a gap between the insertion claw and the staple holder,
3. The staple removal device according to claim 1, wherein the staple removal device opens the staple.

The invention according to claim 4 includes:
a main body base assembled with a device main body including the insertion claw, the staple holder, and the driving means;
a main body cover that covers the device main body;
a tip cover attached to the main body cover so as to be movable in the vertical direction;
The staple holder is located above the insertion claw, and the tip of the insertion claw projects downward from the lower surface of the main body base,
The tip cover is always urged downward by a cover urging means,
The lower end of the tip cover covers the tip of the insertion claw, and is configured to move upward when an operator presses the device against the paper stack as the operator inserts the insertion claw. 4. A staple removal device according to claim 3.

The invention according to claim 5 includes:
The tip cover is
5. The staple removing device according to claim 4, wherein the insertion claw is configured to restrict lifting of the paper stack when the staple is removed from the paper stack.

The invention according to claim 6 includes:
4. The staple removing device according to claim 1, further comprising a sheet bundle holder that restricts lifting of the sheet bundle when removing the staple from the sheet bundle.

The invention according to claim 7 includes:
The paper stack holder is
7. The staple removing device according to claim 6, wherein the staple removing device is fixed to a main body of the device and is configured to prevent the stack of sheets from rising when the staples are removed from the stack of sheets.

The invention according to claim 8 includes:
The paper stack holder is movable up and down,
7. The staple removing device according to claim 6, wherein the staple removing device is configured to restrict floating of the paper stack when removing the staple from the paper stack in the lower position.

The invention according to claim 9 includes:
The staple holder is
The staple removing device according to any one of claims 1 to 8, further comprising an elastic body on the side of the surface that presses the staple.

The invention according to claim 10 is
A portion of the insertion claw and a portion of the staple holder can engage with each other in a concave and convex manner,
Insert the insertion claw between the staple and the paper surface in a state where the paper stack is placed,
The staple holder rides on the staple and bends,
further advancing the insertion claw and the staple holder, and the staple holder is removed from the staples;
According to any one of claims 1 to 9, the proper position of the staple is detected when a part of the insertion claw and a part of the staple holder enter into a convex-concave engagement state. This is a staple removal device.

The invention according to claim 11 is
The insertion claw has a recessed part,
Due to the click feeling when the staple engages with the recessed part,
The staple removal device according to any one of claims 1 to 9, wherein the staple removal device detects the proper position of the staple.

The invention according to claim 12 is
The insertion claw has an inclined surface on the upper side of the tip,
The staple holder has a reference line, and the staple inserted through the inclined surface of the insertion claw is aligned with the reference line of the staple holder,
The staple removal device according to any one of claims 1 to 9, wherein the staple removal device detects the proper position of the staple.

The invention according to claim 13 is
an actuator actuated by a staple;
Equipped with a sensor that detects staples,
The actuator is actuated by the staple pushing the actuator by insertion of the insertion claw,
The staple removal device according to any one of claims 1 to 9, wherein the sensor detects the proper position of the staple by operation of the actuator.

The invention according to claim 14 is
Equipped with notification means,
14. The staple removal device according to claim 10, wherein the notification means notifies the user of the detection of the proper position of the staple.

The invention according to claim 15 is
comprising control means;
14. The staple removal device according to claim 10, wherein the control means drives the insertion claw and the staple presser by detecting the proper position of the staple.

The invention according to claim 16 is
The insertion claw has a notch,
16. The staple removing device according to claim 1, wherein the staple that remains in the sheet bundle due to incomplete removal is inserted into the notch and removed.

The invention according to claim 17,
A staple removal device that removes staples from a stack of sheets bound with staples,
an insertion claw that can be inserted between the staple and the paper surface when the paper stack is placed;
Driving means for driving the insertion claw,
The driving means is
The insertion claw inserted between the staple and the paper surface is moved from a standby position to a removal position,
At the removal position, the insertion claw is energized to separate the staple from the paper stack, and the insertion claw is applied with a magnetic force to hold the staple;
The staple removal device is characterized in that the staple is released from holding the staple by cutting off the power supply and erasing the magnetic force applied to the insertion claw.

The invention according to claim 18 includes:
A staple removal device that removes staples from a stack of sheets bound with staples,
an insertion claw that can be inserted between the staple and the paper stack in a state where the paper stack is placed;
The insertion claw has a shape with an upper inclined surface that is pointed toward the tip,
moving the insertion claw along the surface of the paper stack;
The staple removing device is characterized in that the staple is separated from the paper bundle by a height change caused by an upper inclined surface of the insertion claw.

The invention according to claim 19 is
19. The staple removal device according to claim 18, further comprising a staple holder capable of holding the staple.

The invention according to claim 20 is
20. The staple removing device according to claim 18, further comprising a driving means for moving the insertion claw along the surface of the sheet bundle.

The invention according to claim 21 is the staple removing device according to any one of claims 1 to 20, further comprising a storage box for storing the staples removed from the paper bundle.

The invention according to claim 22,
22. The staple removing device according to claim 1, further comprising a magnifying glass that displays a state in which the staple is removed from the paper bundle.

The invention according to claim 23,
The power source for driving the driving means is
23. The staple removal device according to claim 1, wherein the staple removing device is an AC power source connected to a commercial power supply or a DC power source connected to a built-in battery.

The invention according to claim 24,
24. The staple removal device according to any one of claims 1 to 23, characterized in that the staple removal device has a configuration of a horizontal operation type or a vertical operation type.

The invention according to claim 25 is:
The insertion claw is movable between a retracted position within the device main body and a removal position outside the device main body,
an insertion nail moving means for moving the insertion nail;
an operation state notification means for notifying the operation state of the insertion claw;
an operation start means for starting the operation of the operation claw;
Before power is turned on, the insertion claw is located at the retracted position,
When the power is turned on, the insertion claw moving means moves the insertion claw from the retracted position to the removal position, and the operation state notification means notifies the operation state of the insertion claw,
The operation start means starts the operation of the operation claw to remove the staple, and after the removal is completed and a specified time elapses, the insertion claw moving means moves the insertion claw from the removal position to the retracted position. The staple removal device according to any one of claims 1 to 24.

The invention according to claim 26,
The operation state notification means is configured to notify the operation state of the insertion claw,
26. The staple removing device according to claim 25, further comprising: a notification that the stapler can be used after the power is turned on, and a notification that the stapler can be removed after the insertion claw is inserted.

The invention according to claim 27,
A staple removal device that removes staples from a stack of sheets bound with staples,
an insertion claw that can be inserted between the staple and the paper surface when the paper stack is placed;
A staple holder that can hold staples,
a driving means for moving back and forth a claw unit including the insertion claw and the staple holder;
The driving means is
By moving forward, the insertion claw is inserted between the staple and the sheet surface, and by further moving forward, the claw unit is tilted upward to sandwich the staple between the insertion claw and the staple holder and separate it from the paper stack. ,
The staple removal device is characterized in that, by moving backward, the insertion claw is driven in the opening direction to release the staple from being held between the insertion claw and the staple holder.

The invention according to claim 28,
The claw unit is
It has a front protrusion that moves laterally and vertically and a rear protrusion that moves laterally,
a movable holder that supports the insertion claw and the staple holder;
The driving means is
A motor that serves as a driving source,
a power transmission means for transmitting power from the motor;
a support bracket having a guide groove that allows the front protrusion and the rear protrusion to move;
Converting the rotational force of the motor into linear movement,
The movable holder is advanced to insert the insertion claw between the staple and the paper surface, and further advanced to sandwich the staple between the insertion claw and the staple holder by upward movement of the front protrusion. Separate from the paper stack,
27. The movable holder is moved backward, and the insertion claw is driven in the opening direction by the downward movement of the front protrusion, thereby releasing the staple from being held between the insertion claw and the staple holder. This is the staple removal device described in .

The invention according to claim 29,
A staple extracting tool for extracting the staples from a stack of sheets bound with staples,
The stapler has a structure in which both opposing legs penetrate the paper stack, and the paper stack is stapled by the two penetrating legs,
a fixed claw and an operating claw that can be inserted between the staple and the paper stack when the paper stack is stapled;
the fixing claw is inserted between the staple and the paper stack;
The staple extractor is characterized in that the operating claw extracts the staple from the paper bundle.

The invention according to claim 30,
The fixed claw is
30. The staple extractor according to claim 29, having a width that allows the staple to be inserted between opposing legs of the staple.

The invention according to claim 31 is
fixing the fixing claw to the extractor body;
a swinging holder swingably provided on the extraction tool body;
an operation lever for operating the swing holder;
the swinging holder is provided with the operating claw;
The operation lever is
31. The staple extracting tool according to claim 29 or 30, wherein the staple is extracted by the operating claw via the swinging holder.

The invention according to claim 32,
A movable claw unit is provided on the extractor body,
fixing the fixed claw to the claw unit;
The claw unit is
includes a rocking bracket that can rock;
the swing bracket is provided with the operating claw;
By operating the operating lever,
advancing the claw unit and inserting the fixed claw and the operating claw between the staple and the paper stack;
By the subsequent operation of the operating lever,
31. The staple extractor according to claim 29 or 30, wherein the staple is extracted by the operating pawl via the swing bracket.

The invention according to claim 33 is:
The operation lever is
a cam portion that moves the claw unit;
a guide portion that pushes the swing bracket;
By operating the operating lever,
the cam portion advances the claw unit;
By the subsequent operation of the operating lever,
The guide section pushes the swing bracket to swing the swing bracket,
33. The staple extractor according to claim 32, wherein the staple is extracted by the operating claw.

The invention according to claim 34 is
The cam part is
a cam portion that moves the claw unit;
a guide portion that swings the swing bracket;
The cam portion has a pressing surface and an arcuate surface,
By operating the operating lever,
The pushing surface advances the claw unit, and when the claw unit moves forward and reaches the extraction position, the arcuate surface stops the movement of the claw unit,
34. The staple extractor according to claim 33, wherein when the claw unit is in a stopped state, the guide portion swings the swinging bracket and extracts the staple with the operating claw.

The invention according to claim 35 is
An image forming apparatus comprising the staple removing device or the staple extracting tool according to any one of claims 1 to 34.

With the above configuration, the present invention has the following effects.

In the invention described in claims 1 to 35, an insertion claw that can be inserted between the staple and the paper surface in a state where the paper stack is placed, a staple presser that can hold the staple, and an insertion claw that can be inserted between the staple and the paper surface; A driving means for driving the nail and the staple holder, the driving means drives the insertion nail inserted between the staple and the paper surface in the outward direction, and pinches the staple between the insertion nail and the staple holder and removes the staple from the paper stack. After releasing the staple from the paper stack, the insertion claw is driven in the release direction to release the staple from being caught between the insertion claw and the staple holder.It has a small number of parts, has a simple structure, is compact, and is reliable. It is possible to remove staples from a bundle of sheets including a genuine saddle-stitched sheet stapled near the center of the bundle of sheets.

FIG. 2 is a perspective view of a staple removal device. FIG. 3 is a front view of the device main body. FIG. 3 is a plan view of the device main body. FIG. 3 is a bottom view of the device main body. FIG. 3 is a diagram showing the operation of the device. FIG. 3 is a perspective view showing the configuration of a regulating section. FIG. 3 is a diagram showing the removal of staples. It is a figure which shows the operation|movement of a front-end cover. It is a figure showing use. FIG. 3 is a plan view of an embodiment of a paper bundle presser. FIG. 3 is a perspective view of an embodiment of a paper bundle presser. FIG. 2 is a perspective view of an embodiment of a staple holder. FIG. 3 is an operational diagram of an embodiment of a staple holder. FIG. 3 is a plan view of an embodiment of staple position sensing. FIG. 3 is an operational diagram of an embodiment of staple position sensing. FIG. 3 is a side view of an embodiment of staple position sensing. FIG. 2 is a perspective view of an embodiment of staple position sensing. FIG. 3 is a plan view of an embodiment of staple position sensing. FIG. 2 is a perspective view of an embodiment of staple position sensing. FIG. 3 is an operational diagram of an embodiment of staple position sensing. FIG. 3 is a configuration diagram of staple position detection. It is a perspective view of an insertion nail. FIG. 3 is a diagram showing the removal of staples. FIG. 2 is a schematic configuration diagram of a staple removal device. FIG. 3 is a diagram showing the operation of the device. FIG. 2 is a schematic configuration diagram of a staple removal device. FIG. 3 is a diagram showing the operation of the device. FIG. 2 is a schematic configuration diagram of a staple removal device. FIG. 2 is a schematic configuration diagram of a staple removal device. FIG. 2 is a block diagram showing a schematic configuration of a staple removal device. It is a figure which shows operation|movement. It is an operation flow diagram of normal mode. It is an operation flow diagram of automatic mode. FIG. 2 is a plan view showing a schematic configuration of a staple removal device. FIG. 2 is a perspective view from above showing a schematic configuration of a staple removal device. FIG. 2 is a perspective view from below showing a schematic configuration of the staple removal device. It is a perspective view of a claw unit. FIG. 3 is a diagram showing the operation of the staple removal device. 1 is a diagram showing the structure of an image forming apparatus. FIG. 2 is a perspective view of the staple extractor. FIG. 3 is a diagram showing insertion of a fixed claw and an operating claw. FIG. 3 is a diagram showing extraction using a fixed claw and an operating claw. FIG. 2 is a diagram showing the operation of the fixed claw and the operating claw in the first form. is a second form operation diagram of a fixed claw and an operating claw. FIG. 2 is a perspective view of the staple extractor. FIG. 2 is a diagram showing a configuration in which a fixed claw and an operating claw are moved. FIG. 3 is a diagram showing the operation of the operating lever. FIG. 3 is a diagram showing a configuration for extracting with an operating claw.

Embodiments of a staple removing device, a staple removing tool, and an image forming apparatus of the present invention will be described below. Although this embodiment shows a preferred form of the staple removal device, the invention is not limited thereto.

"First form"
An embodiment of this staple removal device will be described based on FIGS. 1 to 23. 1 is a perspective view of the staple removal device, FIG. 2 is a front view of the device main body, FIG. 3 is a plan view of the device main body, FIG. 4 is a bottom view of the device main body, FIG. 5 is a diagram showing the operation of the device, and FIG. 7 is a perspective view showing the structure of the regulating portion, FIG. 7 is a view showing staple removal, FIG. 8 is a view showing the operation of the tip cover, and FIG. 9 is a view showing use.

(Appearance of staple removal device)
As shown in FIG. 1, this staple removal device 1 is a device for removing staples from a stack of stapled sheets, and has a size and structure that allows a user to hold and operate it with one hand. The staple removal device 1 includes a device main body 10, a main body base 2 to which the device main body 10 is assembled, a main body cover 3 that covers the device main body 10, and a tip cover 4.

The tip cover 4 is made of transparent resin to improve visibility, and is attached to the main body cover 3 so as to be movable upward. The front side of the tip cover 4 has an open structure, so that when the staple is removed, the open part 4a does not interfere with the staple that binds the bundle of sheets. A drive button 5 is supported on the main body cover 3, and by pressing the drive button 5, the device is activated and it is possible to remove the staple from the stack of stapled sheets.

(Structure of the device body)
As shown in FIGS. 2 to 6, the apparatus main body 10 includes an insertion claw 20 that can be inserted between the staple and the paper surface when a stack of paper is placed thereon, and a staple presser that can hold the staple. 30, and a driving means 40 for driving the insertion claw 20 and the staple holder 30.

The insertion claw 20 and the staple holder 30 are arranged close to each other. The insertion claw 20 is fixed to the drive plate 21, and the tip 20a of the insertion claw 20 has a sharp shape that can be inserted between the staple and the paper surface. The staple holder 30 is provided on a pair of block bodies 31, and the tip end 30a of the staple holder 30 has a sharp shape.

The tip width W1 of the staple holder 30 is narrower than the tip width W2 of the insertion claw 20, and at the initial position of the insertion claw 20 and the staple holder 30, a gap L1 is formed between the insertion claw 20 and the staple holder 30. The tip 20a of the insertion claw 20 projects further forward than the tip 30a of the staple holder 30.

The driving means 40 drives the insertion claw 20 inserted between the staple and the paper surface in the removal direction, and the insertion claw 20 and the staple holder 30 pinch the staple and separate it from the paper stack, thereby separating the staple from the paper stack. After that, the insertion claw 20 is driven in the opening direction to release the staple between the insertion claw 20 and the staple holder 30. The drive means 40 includes a drive shaft portion 60 that rotatably supports the insertion claw 20, a link mechanism 70 that drives the drive shaft portion 60, and an electric drive source 80 that drives the link mechanism 70.

The drive shaft portion 60 is rotatably supported by the main body base 2 by a support shaft 61, and is formed in an L-shape consisting of one end portion 60a and the other end portion 60b. A drive plate 21 is fixed to one end 60a of the drive shaft portion 60 to drive the insertion claw 20, and a link mechanism 70 is connected to the other end 60b.

The link mechanism 70 includes a long link 71, a drive shaft 72, and a short link 73. The long link 71 is arranged in the front-rear direction and connects the other end 60b of the drive shaft portion 60 and the short link 73. The drive shaft 72 is rotatably supported on the rear side of the device main body 10 via a support 74, and the short links 73 are fixed to both sides of the drive shaft 72.

The electric drive source 80 includes a motor 81 located at the center of the device body 10 and an output shaft 82 . The output shaft 82 is connected to the drive shaft 72 via a helical bevel gear 83. The motor 81 is driven by operating the drive button 5 and rotates forward and reverse, and the power of the motor 81 is transmitted from the output shaft 82 to the drive shaft 72 via the helical bevel gear 83.

A bottom dead center sensor S1 and a top dead center sensor S2 are arranged on the support body 74 to detect the rotational position of the drive shaft 72. The position where the bottom dead center sensor S1 detects the convex portion on one side of the drive shaft 72 is the initial position of the insertion claw 20 driven via the link mechanism 70. The position where the top dead center sensor S2 detects the convex portion on the other side of the drive shaft 72 is the position where the staple is sandwiched between the insertion claw 20 driven via the link mechanism 70 and the staple holder 30 and separated from the sheet stack.

This staple removal device 1 includes a regulating portion 50 that forms a gap L1 between the insertion claw 20 and the staple holder 30 in an initial state. This regulating part 50 is formed in a housing 51 that supports the staple presser 30, a support shaft 52 connected to the staple presser 30 via the block body 31, and a support shaft 52 that is connected to the lower hole position P1. It includes a regulating hole 53 that is movably supported to the upper hole position P2, and a biasing means 54 that always biases the support shaft 52 toward the lower hole position P1 via the staple holder 30.

The biasing means 54 is constituted by a spring disposed between the block body 31 and the main body cover 3, and always biases the support shaft 52 toward the lower hole position P1 via the staple holder 30.

This housing 51 has a configuration in which a pair of plates are erected on the main body base 2 at a predetermined interval.A regulation hole 53 is formed in this housing 51, and a support shaft 52 connected to the staple holder 30 by the regulation hole 53 is formed in the housing 51. is movably supported. The regulation hole 53 is formed in an oblique direction so as to be lower on the front side and higher toward the rear side, and is configured to support the support shaft 52 movably between a lower hole position P1 on the front side and an upper hole position P2 on the rear side. It is.

The insertion claw 20 is connected to one end 60a of the drive shaft portion 60 via the drive plate 21, and the insertion claw 20 at the initial position is driven in the removal direction by the electric drive source 80 via the link mechanism 70. In the initial position, the support shaft 52 connected via the block body 31 of the staple holder 30 is at the lower hole position P1 of the regulation hole 53, and a gap L1 is formed between the staple holder 30 and the insertion claw 20. Then, in a state in which the paper bundle is placed, the insertion claw 20 is inserted between the staple ST and the paper surface (FIG. 7(a)).

When the electric drive source 80 drives the insertion claw 20 in the initial position in the removal direction via the link mechanism 70, the insertion claw 20 lifts the staple ST from the paper surface and pulls it out slightly, so the staple ST is pressed against the staple holder 30. They come into contact (FIG. 7(b)). When the staple ST is pressed by the staple presser 30, when the electric drive source 80 further drives the insertion claw 20 at the initial position in the removal direction via the link mechanism 70, the support shaft 52 is activated by the urging force of the urging means 54. The staple ST is moved along the regulation hole 53 against the pressure, and the staple ST is held between the insertion claw 20 and the staple holder 30 and separated from the sheet bundle (FIG. 7(c)).

At the position where the staple ST is sandwiched between the insertion claw 20 and the staple holder 30 and separated from the paper stack, the top dead center sensor S2 detects the convex portion on the other side of the drive shaft 72, and after separating the staple ST from the paper stack, The insertion claw 20 is driven in the opening direction by the electric drive source 80 via the link mechanism 70.

Since the drive shaft portion 60 is rotated in the releasing direction by the link mechanism 70, the support shaft 52 urged by the urging means 54 moves along the regulation hole 53, reverses from the upper hole position P2, and engages the insertion claw 20. The staple holder 30 moves toward the lower hole position P1.

The movement of the support shaft 52 is regulated by the regulation hole 53 at the lower hole position P1 of the regulation hole 53, but since the insertion claw 20 moves, a gap is formed between the staple holder 30 and the insertion claw 20, Open the staple ST (FIG. 7(d)).

In this way, the support shaft 52 forms a gap between the insertion claw 20 and the staple holder 30 at the lower hole position P1, and the support shaft 52 moves along the regulation hole 53 to move the insertion claw 20 and the staple holder 30. pinch the staple and separate it from the paper stack. The support shaft 52 is reversed from the upper hole position P2, the insertion claw 20 and the staple holder 30 move toward the lower hole position P1, and the movement of the support shaft 52 is regulated by the regulation hole 53 at the lower hole position P1. Then, the insertion claw 20 moves to form a gap L1 between the insertion claw 20 and the staple holder 30, and the staple is released.

In this way, the drive means 40 includes the drive shaft section 60 that drivably supports the insertion claw 20, the link mechanism 70 that drives the drive shaft section 60, and the electric drive source 80 that drives the link mechanism 70. The insertion claw 20 is driven in the removal direction by the electric drive source 80 via the link mechanism 70 and the drive shaft portion 60, and the staple ST is held between the insertion claw 20 and the staple holder 30 and separated from the paper stack. After separating it from the paper stack, the insertion claw 20 is driven in the opening direction via the link mechanism 70 and the drive shaft section 60 to release the staple ST between the insertion claw 20 and the staple holder 30, reducing the number of parts. It has a simple configuration and is compact, and it is possible to reliably remove staples from a bundle of sheets.

(Configuration of tip cover)
As shown in FIG. 8, the staple removal device 1 of this embodiment includes an insertion claw 20, a staple holder 30, a main body base 2, and a main body cover 3. A tip cover 4 is attached to the main body cover 3 so as to be vertically movable, and the tip cover 4 is always urged downward by a cover biasing means 7.

In the initial state, the staple holder 30 is positioned above the insertion claw 20, and the tip 20a of the insertion claw 20 protrudes downward by a length L2 from the lower surface 2a of the main body base 2 (FIG. 8(a)). . The lower end 4a of the leading end cover 4 covers the leading end 20a of the insertion claw 20, but when the insertion claw 20 removes the staple ST from the paper stack, the leading edge cover 4 is lifted up by the operator. The apparatus is configured to move upward by the operation of pressing the device against the stack of sheets in conjunction with the insertion operation of the insertion claw 20 (FIG. 8(b)).

The distal end cover 4 is made of transparent resin in order to improve visibility, and allows the operation of the insertion claw 20 and the staple holder 30, the state of staple removal, etc. to be easily visually observed.

The use of the staple removal device 1 will be explained based on FIG. 9. FIG. 9(a) shows the insertion of the insertion claw 20, and since the tip cover 4 is always urged downward by the cover urging means 7, it is necessary to press it downward accordingly. . The insertion claw 20 moves on the surface of the paper stack P and is inserted between the staple ST and the paper surface in a state where the paper stack P is placed. It is located along the surface of the paper bundle P.

FIG. 9(b) shows the staple ST being removed. The insertion claw 20 and the staple holder 30 move in the pulling direction. As a result, the leading end cover 4 is pulled by the paper stack P and moves upward against the biasing force of the cover biasing means 7, and reaches a position where the staple ST is held between the insertion claw 20 and the staple presser 30 and separated from the paper stack. , the upper end of the tip cover 4 momentarily protrudes upward from the upper end of the main body cover 3, and the lower end becomes flush with the lower end of the main body cover 3.

FIG. 9(c) shows the state after the staple ST has been removed. When the insertion claw 20 and the staple holder 30 move in the pull-out direction and separate the staple ST from the paper bundle P, the insertion claw 20 and the staple holder 30 are reversed and move toward the lower hole position.

The movement of the support shaft 52 is regulated by the regulation hole 53 at the lower hole position of the regulation hole 53, but since the insertion claw 20 moves, a gap is formed between the staple holder 30 and the insertion claw 20, and the staple After opening ST and completing the operation, shake off the staple ST.

The leading edge cover 4 is located along the surface of the paper stack P when the insertion claw 20 is inserted, and the upper end of the leading edge cover 4 momentarily moves above the upper end of the main body cover 3 at the position where the staple ST is pinched and separated from the paper stack. Although it protrudes and has a lower end that is the same as the lower end of the main body cover 3, the tip cover 4 is configured to prevent the paper stack P from being lifted up when the insertion claw 20 removes the staple ST from the paper stack P.

[Embodiment of paper stack holding]
This staple removal device 1 can include a paper stack presser 100 that restricts lifting of the paper stack P when removing the staple ST from the paper stack P as shown in FIGS. 10 and 11. By restricting lifting of the paper bundle P, the staple ST can be easily and reliably removed from the paper bundle P.

The embodiment shown in FIG. 10 has a configuration in which a paper stack presser 100 is provided in the apparatus main body 10, and the paper stack presser 100 is arranged on both sides of the insertion claw 20. The paper stack presser 100 may be fixed to the apparatus main body 10, or may be movable up and down relative to the paper stack P.

If the paper stack presser 100 is movable up and down, it is configured to prevent the paper stack P from lifting up when the staple ST is removed from the paper stack P in the lower position. The configuration for vertically moving the paper stack presser 100 may be one in which the paper stack presser 100 is moved up and down electrically, or it may be moved up and down manually.

In the embodiment shown in FIG. 11(a), a paper stack holder 100 is fixed to the main body 10 of the apparatus, and the lower end 100a of the paper stack holder 100 always presses the paper stack P from above, so that the paper stack holder 100 is fixed to the apparatus main body 10. To restrict lifting of a stack of sheets P when removing a staple ST.

In the embodiment shown in FIG. 11(b), the sheet bundle presser 100 is manually moved up and down in the apparatus main body 10. When necessary, the paper stack holder 100 is manually moved downward and the lower end portion 100a presses the paper stack P from above, thereby regulating the lifting of the paper stack P when removing the staple ST from the paper stack P.

In the embodiment shown in FIG. 11(c), the paper stack presser 100 is moved up and down electrically to the main body 10 of the apparatus. In the electric-driven vertical movement configuration, for example, a motor 110 rotates a roller 112 via a belt 111, and the rotation of the roller 112 moves the paper stack presser 100 up and down. When necessary, the paper stack holder 100 is electrically moved downward and the lower end portion 100a presses the paper stack P from above, thereby regulating the lifting of the paper stack P when removing the staple ST from the paper stack P.

[Embodiment of staple holding]
The staple holder 30 can be configured as shown in FIGS. 12 and 13. The embodiment shown in FIG. 12 has a structure in which the tip end 30a of the staple holder 30 has an elastic body 120 such as rubber on at least the side that holds the staple.

In the state where the paper stack is placed, the insertion claw 20 is inserted between the staple ST and the paper surface (FIG. 13(a)), and the insertion claw 20 lifts the staple ST from the paper surface and pulls it out slightly. The staple ST comes into contact with the staple holder 30 (FIG. 13(b)), but the staple ST is embedded in the elastic body 120 and can be firmly held.

When the staple ST is held between the insertion claw 20 and the staple holder 30 and separated from the paper stack (FIG. 13(c)), the staple ST can be pulled out by the elastic body 120. After separating the staple ST from the paper stack, the staple holder A gap is formed between the insertion claw 30 and the insertion claw 20, and the staple ST is released (FIG. 13(d)).

The configuration in which the staple ST is held between the insertion claw 20 and the staple holder 30 and separated from the paper stack is as follows: After the staple ST is lifted upward by the insertion claw 20 and the staple holder 30 and twisted to be pulled out, and the staple ST is separated from the paper stack. The staple ST may be released by returning to the original position to form a gap between the staple holder 30 and the insertion claw 20.

[Embodiment of staple position detection]
An embodiment of staple position detection will be described based on FIGS. 14 to 20. In the embodiment shown in FIGS. 14 and 15, a portion 20c of the insertion claw 20 and a portion 30c of the staple holder 30 can be engaged with each other in a concave-convex manner, and the staple ST is detected based on the position of the concave-convex engagement.

In this embodiment, the staple holder 30 is formed of an elastic member, a portion 20c of the insertion claw 20 is a recessed portion, and a convex portion of the staple holder 30 engages with this recessed portion.

Detection of the staple ST by the uneven engagement position is such that the part 20c of the insertion claw 20 and the part 30c of the staple holder 30 are in the uneven engagement state (FIG. 15(a)), and the stack of sheets is placed. In this state, when the insertion claw 20 is inserted between the staple ST and the paper surface, the staple presser 30 rides on the staple ST and bends (FIG. 15(b)).

When the insertion claw 20 and the staple holder 30 are further advanced to the position where the staple ST is separated from the paper stack (FIG. 15(c)), the staple holder 30 is removed from the staple ST and a part 20c of the insertion claw 20 is removed. , and a portion 30c of the staple holder 30 are brought into a convex-concave engagement state. At this time, by releasing the staple holder 30, it is possible to detect the proper position of the staple ST.

In the embodiment shown in FIG. 16, the insertion claw 20 has a concave portion 20d. The proper position of the staple ST can be detected by the click feeling when the insertion claw 20 is advanced and the staple ST engages with the recessed portion 20d.

In the embodiment shown in FIG. 17, the insertion claw 20 has an inclined surface 20e on the upper side of the tip, and the staple holder 30 has a reference line T. The insertion claw 20 is inserted between the staple ST and the paper surface, the staple ST is inserted through the inclined surface 20e of the insertion claw 20, and the staple ST is aligned with the reference line T of the staple holder 30 to position the staple ST at its proper position. This is a configuration that detects

The embodiment of FIG. 18 includes a staple actuated actuator 140;
A sensor 141 that detects staples is provided. The actuator 140 is composed of a moving lever, and the staple ST is actuated and moved by pushing the actuator 140 when the insertion claw 20 is inserted. The sensor 141 is configured to detect the proper position of the staple by the operation of the actuator 140.

The embodiment of FIG. 19 includes a staple actuated actuator 150;
A sensor 151 that detects staples is provided. The actuator 150 is composed of a rotating lever, and has a detection section 150a, a contact section 150b, and a rotational fulcrum 150c. The actuator 150 is rotatably supported by the device main body 10 about a rotation fulcrum 150c, and is urged by a spring 152 so that it is always located at the initial position.

The staple holder 130 is rotatably supported by the apparatus main body 10 via a support shaft 131, and is urged by a spring 132 so as to always be located at the initial position.

Before insertion of the insertion claw 20, in FIG. 20(a), the contact portion 150b of the actuator 150 is not in contact with the staple ST, so the detection portion 150a is at a position where it is not detected by the sensor 151.

20(b), the contact portion 150b of the actuator 150 comes into contact with the staple ST and is pushed, so that the actuator 150 resists the spring 152. Rotate.

As the actuator 150 rotates, the detection unit 150a is detected by the sensor 151. In this manner, the proper position of the staple is detected by the operation of the actuator 150.

The actuator 140 is actuated and moved by the insertion of the insertion claw 20 and the staple ST pushing the actuator 140 . The sensor 141 is configured to detect the proper position of the staple ST by the operation of the actuator 140.

Although the embodiment of staple position detection has been described based on FIGS. 14 to 20, this embodiment can include the configuration shown in FIG. 21.

The staple position sensing embodiment includes a sensing means 200, which is comprised of a contact sensor or a non-contact sensor. As the contact sensor, for example, a contact switch or the like can be used. As the non-contact sensor, for example, an optical switch, a capacitance switch, etc. can be used.

The detection information from the detection means 200 can be sent to the notification means 210 or the control means 220, or can be sent to the notification means 210 and the control means 220.

The notification means 210 is configured to notify the user of the detection of the proper position of the staple ST, and notifies the user by, for example, lighting an LED or generating a sound.

The control means 220 is configured to drive the insertion claw and the staple holder by detecting the proper position of the staple ST, and automatically starts the operation of removing the staple ST.

[Embodiment of insertion claw]
An embodiment of the insertion claw will be described based on FIGS. 22 and 23. FIG. 22 is a perspective view of the insertion claw, and FIG. 23 is a diagram showing removal of the staple.

In the embodiment of FIG. 22, the insertion claw 20 has an inclined surface 20e on the upper side of the tip, and
It has a notch 20f at the center of the tip. This notch 20f has a shape that allows the foot of the staple ST to be inserted, and when the staple ST remains in the paper stack due to incomplete removal, the foot of the staple ST can be inserted into the notch 20f and removed. It is the composition.

The staple holder 30 has a reference line T. A paper stack presser 100 extends from the apparatus main body 10 on both sides of the insertion claw 20 and the staple presser 30, and the staple presser 30 is formed at a height that allows the reference line T provided on the staple presser 30 to be easily visible. has been done. Therefore, it is possible to easily confirm that the staple ST coincides with the position of the reference line T by inserting the insertion claw 20, and then remove the staple ST.

Even when the staple removal device 1 of this embodiment is used, only one leg of the staple ST may remain if used incorrectly (FIG. 23(a)). If the removal of the staple ST is incomplete in this way, the notch 20f of the insertion claw 20 is pressed against the staple ST remaining in the paper stack due to incomplete removal (FIG. 23(b)), and the staple ST is cut into the stack. After that, a staple ST removal operation is performed to remove the staple ST remaining in the sheet bundle (FIG. 23(c)).

"Second form"
An embodiment of this staple removal device will be described based on FIGS. 24 and 25. FIG. 24 is a schematic diagram of the staple removal device, and FIG. 25 is a diagram showing the operation of the device.

This staple removal device 1 is a device for removing staples ST from a stack of sheets bound with staples ST, and includes an insertion claw that can be inserted between the staple ST and the paper surface when the stack of sheets is placed. 200, and a driving means 210 for driving the insertion claw 200.

The insertion claw 200 has a claw portion 201 inserted between the staple ST and the paper bundle P, and a shaft portion 202 continuous to the claw portion 201, and a coil 203 is attached to the shaft portion 202.

The driving means 210 includes a moving means 211 that moves the insertion claw 200 and an energizing means 212 that energizes the insertion claw 200. The energizing means 212 winds a coil 213 around the insertion claw 200 and energizes the coil 213. By applying a magnetic force to the insertion claw 200 and cutting off the current, the magnetic force of the insertion claw 200 is erased.

The driving means 210 is configured to move the insertion claw 200 inserted between the staple ST and the paper surface P from the standby position to the removal position, and moves from the standby position to the removal position (FIG. 25(a)). At the removal position, the insertion claw 200 is energized (FIG. 25(b)) to separate the staple ST from the paper stack P, and at the same time, a magnetic force is applied to the insertion claw 200 to hold the staple ST (FIG. 25(c)). is interrupted to erase the magnetic force applied to the insertion claw 200, release the holding of the staple ST (FIG. 25(d)), and move the insertion claw 200 from the removal position to the standby position.

"Third form"
An embodiment of this staple removal device will be described based on FIGS. 26 and 27. FIG. 26 is a schematic diagram of the staple removal device, and FIG. 27 is a diagram showing the operation of the device.

This staple removing device 1 is a device that removes staples ST from a stack of sheets P bound with staples ST, and can be inserted between the staple ST and the stack of sheets P when the stack of sheets P is placed. A driving means 310 for moving the insertion claw 300 along the surface of the paper stack P, a storage box 360 for storing the staple ST removed from the paper stack P, and an operation button 330 are provided.

The insertion claw 300 has a claw shape with a tip 300a bent downward, and when the insertion claw 300 is moved along the surface of the paper stack P, the tip 300a of the insertion claw 300 reliably connects the staple ST and the paper stack P. get in between.

Both sides of the insertion claw 300 are provided with staple holders 320 capable of holding down the staples ST. The staple ST can be easily and reliably removed.

When the operation button 330 is operated, the driving means 310 is driven, and the driving means 310 moves the insertion claw 300 downward from the initial position (FIG. 27(a)). Then, the insertion claw 300 moves along the surface of the paper stack P and removes the staple ST from the paper stack P (FIG. 27(b)). The staple ST removed from the paper bundle P is stored in the storage box 360 (FIG. 27(c)).

"Fourth form"
An embodiment of this staple removal device will be described based on FIG. 28. FIG. 28 is a schematic diagram of the staple removal device.

This staple removal device 1 is configured in the same manner as the "third embodiment", but has a configuration in which an inclined surface is formed at the tip portion 300b of the insertion claw 300. When the insertion claw 300 moves along the surface of the paper stack P, the staple ST is lifted up by the tip 300b of the insertion claw 300, and can be removed from the paper stack P.

In the embodiment of FIG. 28(a), the staple removal device 1 is of a horizontal type, but it may be of a vertical type as in the embodiment of FIG. 28(b).

"Fifth form"
An embodiment of this staple removal device will be described based on FIG. 29. FIG. 29 is a schematic diagram of the staple removal device.

This staple removal device 1 includes a magnifying glass 400 that displays the state in which the staples are removed from the paper bundle, and the magnifying glass 400 can enlarge and display the state in which the staples are removed from the paper bundle to inform the user.

In the first to fifth embodiments, the power source for driving the driving means can be an AC power source connected to a commercial power supply or a DC power source connected to a built-in battery. When using an AC power source connected to a commercial power source, the weight of the device can be reduced due to the battery installed. With a DC power supply connected to a built-in battery, the staple removal device 1 becomes wireless compatible. Furthermore, the battery can be made lighter by changing the motor from 24V to 12V.

Further, in the first to fifth embodiments, the staple removal device 1 can be configured to operate horizontally or vertically, and is not limited to the horizontally operated type or the vertically operated type.

"Sixth Form"
An embodiment of this staple removal device will be described based on FIGS. 30 to 33. FIG. 30 is a block diagram showing a schematic configuration of the staple removal device, FIG. 31 is a diagram showing the operation, FIG. 32 is an operation flow diagram in normal mode, and FIG. 33 is an operation flow diagram in automatic mode.

In this embodiment of the staple removal device, the insertion claw 20 is movable between a retracted position T1 inside the device main body and a removal position T2 outside the device main body, and the insertion claw movement that moves the insertion claw 20 means 610, an insertion claw position detection means 620 for detecting the position of the insertion claw 20, a staple detection means 630 for detecting the staple ST, an operation start means 640 for starting the operation of the operation claw 20, and a means 640 for detecting the staple ST from the sheet stack. A staple removal means 650 for removing the staple, an operation state notification means 660 for notifying the operation state of the insertion claw 20, and a control means 670 for controlling the insertion claw moving means 610 and the staple removal means 650.

The insertion claw moving means 610 is configured with a mechanical mechanism such as gears and links using a motor as a drive source, for example, and moves the insertion claw 20 to the retracted position T1 and the removal position T2. The position of the insertion claw 20 is at the retracted position T1 inside the device main body shown in FIG. 31(a) before the power is turned on, and at the removal position T2 outside the device main body shown in FIG. 31(b) after the power is turned on. be.

The insertion claw position detection means 620 is composed of, for example, a non-contact sensor, detects the retracted position T1 and the removal position T2 of the insertion claw 20, and sends this detection information to the control means 670.

The staple detection means 630 includes, for example, a staple detection lever 631 and a photo interrupter 632. The staple detection lever 631 is brought into contact with the staple ST by the insertion claw 20 and rotated, and the rotation of the staple detection lever 631 is detected by the photo interrupter 632. detects it (FIG. 31(c)) and sends the detection information to the control means 670.

The operation starting means 640 is constituted by, for example, a transparent push button 641, and by operating the push button 641, the operation of the operating claw 20 is started.The control means 670 controls the staple removing means 650, and removes the staple ST from the paper bundle. Remove.

The staple removing means 650 includes, for example, an insertion claw 20, a staple holder, a driving mechanism such as a gear, a link, etc. using a motor as a driving source, and removes the staple ST from the sheet bundle (FIG. 31(d)).

The operating state notification means 660 is configured with, for example, an LED 661 or a buzzer, and notifies the operating state of the insertion claw 20. The configuration for notifying the operating state of the insertion claw 20 includes notification that use can be started after power is turned on, and notification that removal is possible after insertion of the insertion claw. After the power is turned on, the LED 661 lights up or a buzzer sounds to notify that preparation is complete, and after the insertion nail is inserted, the LED 661 lights up intermittently or the buzzer sounds intermittently to notify that it is ready for use. This is a notification that sounds to prompt operation.

In this embodiment, when the power is turned on, the control means 670 causes the insertion claw moving means 610 to move the insertion claw 20 from the retracted position to the removal position, and the operation state notification means 680 allows the insertion claw 20 to be operated. is notified, the operation start means 640 starts operating the operating claw 20, the staple removing means 650 removes the staple ST, and after completion of removal, the insertion claw moving means 610 removes the insertion claw 20 after a specified time elapses. Move from position T2 to retreat position T1.

The insertion claw 20 is movable between a retracted position T1 inside the apparatus main body and a removal position T2 outside the apparatus main body, and before the power is turned on, the insertion claw 20 is located at the retracted position T1 inside the apparatus main body, Since the insertion claw 20 moves from the retracted position T1 to the removal position T2 when the power is turned on, the insertion claw 20 does not interfere with anything outside the main body of the apparatus, making it safe.

Further, the operating state notification means 660 notifies the operating state of the insertion claw 20, and has a configuration that notifies the operating state of the insertion claw 20, including a notification that it is possible to start use after power is turned on, and a notification that the insertion claw can be removed after insertion. By including the notification, it is possible to notify the user that it is ready to use after the power is turned on, for example by lighting up the LED 661 or sounding the buzzer, and to notify the user that the preparation is complete. For example, the LED 661 lights up intermittently or the buzzer sounds intermittently to notify the user of the operation, so that the staple ST can be reliably removed from the stack of sheets by the staple removing means 650.

In this embodiment, a normal mode of operation or an automatic mode of operation is performed.
(Normal mode)
In FIG. 32, the insertion claw 20 is located at a retracted position T1 within the apparatus main body, and after the power is turned on (S111), it moves to a usable removal position T2 (S112).

The LED lights up (S113), and by visually confirming the lighting of the LED through the transparent push button 641, the user is informed that the device is ready for use.

With the LED on, the insertion claw 20 is inserted before a certain period of time (for example, 1 minute) has elapsed (S114), the insertion claw 20 operates the staple detection lever 631, and the staple detection lever 631 activates the photo interrupter 632. When turned on, the LED flashes rapidly (S115), prompting the user to press the push button 641.

When the user presses the push button 641 (S116), the extraction operation starts, and when it is completed (S117), the LED returns to lighting (S118), ending the operation and waiting for the next operation.

In S114, when a certain period of time (for example, 1 minute) has elapsed with the LED turned on, the insertion claw 20 moves to the retracted position T1 (S119), and the LED turns off (S120).

When the user wants to use it again, when he presses the push button 641 (S121), the process moves to S117 and the extraction operation starts, and when it is completed, the LED returns to lighting (S118) and the operation ends.

In S121, when the power plug is pulled out without pressing the push button 641 (S122), the insertion claw 20 moves to the retracted position T1 (S123), and the LED turns off (S124).

(auto mode)
In FIG. 33, the insertion claw 20 is located at the retracted position T1 within the main body of the device, and when the power is turned on while pressing the push button 641 (S211), the LED blinks slowly (S212) and the insertion claw 20 is ready for use. It moves to a suitable removal position T2 (S213).

When the insertion claw 20 is inserted while the LED is blinking slowly, the insertion claw 20 operates the staple detection lever 631, and the photo interrupter 632 is turned on by the staple detection lever 631, the LED blinks at a high speed (S214). At the same time, the extraction operation is automatically started (S215). When the extraction operation is completed, the LED blinks slowly and ends (S216), waiting for the next operation.

In S212, after a certain period of time (for example, 1 minute) has elapsed (S217), the insertion claw 20 moves to the retracted position T1 (S218), and the LED turns off (S219). Immediately after unplugging the power plug while the power is on (S220), the insertion claw 20 moves to the retracted position T1 (S221), and the LED turns off (S222).

In normal mode, when the power is turned on, the LED lights up, indicating that it can be used in normal mode (operated by pressing a button). In this usable state, when a staple ST is detected, the LED blinks at high speed, indicating that there is a staple ST, and press the button. This shows a state in which the staple ST can be removed by pressing .

In automatic mode, when you turn on the power with the push button pressed, the LED will flash slowly to indicate automatic mode, and when a staple ST is detected, the LED will flash rapidly to indicate that there is a staple ST and press the button. Pressing the button indicates a state in which the staple ST is removed, and the state is expressed by the way the LED lights up, but the way the LED lights up is not particularly limited.

"Seventh Form"
An embodiment of this staple removal device will be described based on FIGS. 34 to 38. FIG. 34 is a plan view showing the general structure of the staple removal device, FIG. 35 is a perspective view from above showing the general structure of the staple removal device, and FIG. 36 is a bottom view showing the general structure of the staple removal device. FIG. 37 is a perspective view of the nail unit, and FIG. 38 is a diagram showing the operation of the staple removal device.

The staple removal device 1 is a device that removes staples from a stack of paper bound with staples, and includes an insertion claw 20 that can be inserted between the staple and the paper surface in a state where the stack of paper is placed, and a staple removal device 1 that removes the staple from a stack of paper bound with staples. It includes a staple holder 30 that can be held down, and a driving means 700 that moves back and forth a claw unit 710 that includes the insertion claw 20 and the staple holder 30.

The drive means 700 includes a support bracket 730, a motor 740, a power transmission means 750, and a power conversion means 760.

The claw unit 710 has a front protrusion 721 that moves laterally and vertically and a rear protrusion 722 that moves laterally, and includes a movable holder 720 that supports the insertion claw 20 and the staple holder 30. .

The support bracket 730 is disposed on both sides of the movable holder 720 and has a guide groove 731 that allows the front protrusion 721 and the rear protrusion 722 to move. The extending portion 731b is continuous.

The left and right front protrusions 721 and rear protrusions 722 provided on the movable holder 720 are movably engaged with guide grooves 731 of the support brackets 730 disposed on the left and right sides. The claw unit 710 provided on the movable holder 720 always urges the insertion claw 20 and the staple holder 30 toward the initial position by a spring 770 provided between the claw unit 710 and the apparatus main body 10.

When the movable holder 720 moves forward and the front protrusion 721 and the rear protrusion 722 move along the laterally extending portion 731a of the support bracket 730, the insertion claw 20 of the claw unit 710 moves the staple between the staple and the paper surface. Insert between. When the movable holder 720 moves further forward, the front protrusion 721 moves along the upwardly extending portion 731b, and the front side lifts up against the spring force of the spring 770, causing the insertion claw 20 provided in the claw unit 710 and the staple holder to move. 30 pinches the staple and separates it from the paper stack.

When the movable holder 720 is moved backward after separating the staple from the paper bundle, the front protrusion 721 moves downward along the upwardly extending portion 731b, and the front side of the movable holder 720 is lowered by the spring force of the spring 770. In this way, the downward movement of the front protrusion 721 drives the insertion claw 20 in the opening direction, thereby releasing the staple between the insertion claw 20 and the staple presser 30.

Motor 740 is disposed between a pair of support brackets 730, and the output of motor 740 is transmitted to power conversion means 760 via power transmission means 750. The power transmission means 750 includes an output gear 751 of the motor 740, a bevel gear 753 and a drive pulley 754 provided on a rotating shaft 752, a timing belt 755, and a driven pulley 756, and transmits the output of the motor 740 to the output gear 751. The power is then transmitted to the power conversion means 760 via the bevel gear 753, rotating shaft 752, drive pulley 754, timing belt 755, and driven pulley 756.

The power conversion means 760 includes pinions 761 provided on both sides of a drive shaft 763 and a rack 762 fixed to the movable holder 720. A guide groove 762a is formed in the rack 762, and a support pin 730a provided on the support bracket 730 is engaged with the guide groove 762a, converting the rotational force of the pinion 761 into linear movement of the rack 762. , move the moving holder 720 forward or backward.

Next, the operation of the staple removal device 1 will be explained. FIG. 38(a) shows the state before operation, in which the front protrusion 721 and rear protrusion 722 of the movable holder 720 are movably engaged with a laterally extending portion 731a of a guide groove 731 formed in the support bracket 730. ing.

When the motor 740 is driven, its output is transmitted from the output gear 751 to the power conversion means 760 via the bevel gear 753, rotating shaft 752, drive pulley 754, timing belt 755, and driven pulley 756. The power conversion means 760 converts the rotational force of the pinion 761 into linear movement of the rack 762, and moves the movable holder 720 forward. The front protrusion 721 and the rear protrusion 722 of the movable holder 720 move forward in a laterally extending portion 731a of a guide groove 731 formed in the support bracket 730, and insert the insertion claw 20 between the staple and the paper surface. Insert (Figure 38(b)).

When the movable holder 720 moves further forward, the front protrusion 721 moves along the upwardly extending portion 731b of the guide groove 731 formed in the support bracket 730, and moves the front of the movable holder 720 against the spring force of the spring 770. The side is lifted, and the staple is held between the insertion claw 20 and the staple holder 30 provided in the claw unit 710 and separated from the paper stack (FIG. 38(c)).

When the motor 740 is driven in the opposite direction after separating the staple from the paper stack, the output in the opposite direction is transmitted from the output gear 751 through the bevel gear 753, the rotating shaft 752, the driving pulley 754, the timing belt 755, and the driven pulley 756. and is transmitted to the power converting means 760. The power conversion means 760 converts the rotational force of the pinion 761 in the opposite direction into linear movement of the rack 762, so that the movable holder 720 moves backward, and the front protrusion 721 of the movable holder 720 moves into the guide groove formed in the support bracket 730. It moves downward along the upwardly extending portion 731b of 731.

As the movable holder 720 moves backward, the front side of the movable holder 720 is directed downward by the spring force of the spring 770, and the insertion claw 20 is driven in the opening direction, thereby releasing the staple from being caught between the insertion claw 20 and the staple holder 30. .

In this embodiment, the user does not have to perform an operation to insert the insertion claw 20 between the staple and the paper surface, and the insertion claw 20 is inserted between the staple and the paper surface by moving forward by the driving means 700. 20, the insertion claw 20 and the staple holder 30 pinch the staple and separate it from the paper stack. After separating the staple from the paper stack, the insertion claw 20 is driven in the opening direction by moving backward, and the insertion claw 20 and the staple holder 30 The staples can be released from the staples.

"Eighth Form"
(Structure of image forming device)
An embodiment of this image forming apparatus will be described based on FIG. 39. FIG. 39(a) is a plan view of the image forming apparatus, and FIG. 39(b) is a front view of the image forming apparatus.

This image forming apparatus 500 includes a staple removal device 1, which is a device for removing staples from a stack of sheets bound with staples. It is the composition of ``Form''.

The functionality of the image forming apparatus 500 is improved by including the staple removing device 1. Since the staple removing device 1 includes the storage box 320, the staples ST removed from the paper bundle P are stored in the storage box 360 without scattering.

Embodiments of the staple extractor of the present invention will be described below. Although this embodiment shows a preferred form of the staple extractor, the invention is not limited thereto.

[First embodiment]
An embodiment of this staple extractor will be described based on FIGS. 40 to 44. 40 is a perspective view of the staple extractor, FIG. 41 is a diagram showing insertion of a fixed claw and an operating claw, FIG. 42 is a diagram showing extraction using a fixed claw and an operating claw, and FIG. 43 is a first form of a fixed claw and an operating claw. FIG. 44 is a second form diagram of the fixed claw and the movable claw.

(Configuration of staple extractor)
The staple extractor 1010 is configured to extract the staples 1001 from a stack of sheets 1002 bound with staples 1001, and a fixed claw 1011 that can be inserted between the staples 1001 and the bundle of sheets 1002 when the bundle of sheets 1001 is stapled. and an operating claw 1012.

The staple 1001 has a configuration in which opposing legs 1001a pass through a stack of sheets 1002, and the stack of sheets 2 is stapled by a bent portion 1001b, which is a bent tip of each of the legs.

The staple extractor 1010 has an extractor main body 1013, and a fixing claw 1011 is fixed to the extractor main body 1013 along the lower end.

A swing holder 1015 is swingably provided on the extractor main body 1013 via a support shaft 1014, and an operating lever 1016 is fixed to the swing holder 1015. The swinging holder 1015 is provided with an operating claw 1012, and the operating claw 1012 is moved via the swinging holder 1015 by operating a control lever 1016.

The fixed claw 1011 has a width W1 that can be inserted between the opposing legs 1001a of the staple 1001, has a wedge portion 1011a at the front end, and has an opening 1011b extending from the tip in the nail axial direction.

The operating claw 1012 has a width W2 that can be inserted between the opposing legs 1001a of the staple 1001, has a wedge portion 1012a at the front end, and a convex portion 1012b extending from the tip in the nail axis direction at the center portion. When the operating claw 1012 is overlapped with the fixed claw 1011, the convex portion 1012b engages with the opening 1011b of the fixed claw 1011, and the fixed claw 1011 and the operating claw 1012 are securely placed between the staple 1001 and the stack of sheets 1002. It can be inserted.

(Removal of staple removal tool)
The staple extractor 1010 is in the state shown in FIG. 40, with the operating claw 1012 superimposed on the fixed claw 1011, and the operation lever 1016 at the initial position.

The user holds the extractor main body 13 with one hand and inserts the fixed claw 1011 and the operating claw 1012 between the staple 1001 and the paper bundle 1002, as shown in FIG.

In this way, when the operating lever 1016 is operated as shown in FIG. 42 with the fixed claw 1011 and the operating claw 1012 inserted between the staple 1001 and the paper stack 1002, the operating claw is inserted through the swing holder 1015. 1012 moves in the direction away from the fixed claw 1011.

In extraction using this staple extraction tool 1010, the fixed claw 1011 has a width W1 that can be inserted between the opposing legs 1001a of the staple 1001, so it corresponds to the bent portion 1001b where the tips of both legs of the staple 1001 are bent. The stack of sheets 1002 is held down. Therefore, when the operating claw 1012 is moved in the pulling direction, the fixed claw 1011 holds down the paper stack 1002 and guides the bent portion 1001b of the staple 1001 in the direction of unbending, so that the staple 1001 is smoothly pulled out from the paper stack 1002 and bent. Damage to the paper when the portion 1001b passes through the paper bundle 1002 is reduced, and the hole remaining after the staple 1001 is removed can be made smaller.

(First form of fixed claw and operating claw)
The first form of the fixed claw and the operating claw are configured as shown in FIG. 43(a). The fixed claw 1011 has a wedge portion 1011a at the front end, an opening 1011b extending from the tip in the claw axis direction, and has an insertable width W1. The operating claw 1012 has a wedge portion 1012a at the front end and has a width W2 that allows insertion, and when the paper bundle 1002 is bound by the wedge portion 1012a, the operating claw 1012 is inserted between the staple 1001 and the paper bundle 1002. Allows for easy insertion.

The operating claw 1012 has a shape that overlaps the fixed claw 1011, and has a protrusion 1011b in the center extending from the tip in the claw axis direction, and this protrusion 1011b engages with the opening 1011b of the fixed claw 1011. , a fixed claw 1011 and an operating claw 1012 ensure that the staple can be inserted between the staple 1001 and the stack of sheets 1002.

The fixed claw 1011 and the operating claw 1012 are inserted between the staple 1001 and the paper stack 1002, and the fixed claw 1011 is inserted between the staple 1001 and the paper stack 1002, as shown in FIG. 43(b). , the operating claw 1012 is moved to remove the staple 1001 from the paper bundle 1002.

When pulling out the staple 1001 from this paper bundle 1002, the fixing claw 1011 has a width W1 that can be inserted between the opposing legs 1001a of the staple 1001, so the fixed claw 1011 bends the tips of both legs of the staple 1001. The stack of sheets 1002 is held down in correspondence with the section 1001b. Therefore, when the operating claw 1012 is moved in the pulling direction, the fixed claw 1011 holds down the paper stack 1002 and guides the bent portion 1001b of the staple 1001 in the direction of unbending, so that the staple 1001 is smoothly pulled out from the paper stack 1002 and bent. Damage to the paper when the portion 1001b passes through the paper bundle 1002 is reduced, and the hole remaining after the staple 1001 is removed can be made smaller.

(Second form of fixed claw and operating claw)
A second form of the fixed claw and the operating claw is configured as shown in FIG. 44(a). The fixed claw 1011 is formed similarly to the first embodiment, but the operating claw 1012 has a shape that engages with the opening 1011b of the fixed claw 1011, and has a width W2 that allows insertion.

The fixed claw 1011 and the operating claw 1012 are inserted between the staple 1001 and the paper stack 1002, and the fixed claw 1011 is inserted between the staple 1001 and the paper stack 1002, as shown in FIG. 44(b). , the operating claw 1012 is moved to lift and remove the central portion of the staple 1001 from the paper stack 1002.

When pulling out the staple 1001 from this paper bundle 1002, the fixing claw 1011 has a width W1 that can be inserted between the opposing legs 1001a of the staple 1001, so the fixed claw 1011 bends the tips of both legs of the staple 1001. The stack of sheets 1002 is held down in correspondence with the section 1001b. When the operating claw 1012 is moved in the pulling direction, the central part of the staple 1001 is lifted and pulled out, but the fixed claw 1011 holds down the paper stack 1002 and guides the bent portion 1001b of the staple 1001 in the direction to unbend the paper stack 1002. The staple 1001 can be smoothly removed from the paper stack 1002, damage to the paper when the bent portion 1001b passes through the paper stack 1002 can be reduced, and the hole remaining after the staple 1001 has been removed can be made smaller.

[Second embodiment]
An embodiment of this staple extractor will be described based on FIGS. 45 to 48. FIG. 45 is a perspective view of the staple extractor, FIG. 46 is a diagram showing a structure for moving a fixed claw and an operating claw, FIG. 47 is a diagram showing operation of an operating lever, and FIG. 48 is a diagram showing a structure for removing staples using an operating claw. be.

(Configuration of staple extractor)
The staple extractor 1010 is configured to extract the staple 1001 from a stack of sheets 1002 bound with staples 1001, and a fixed claw 1011 that can be inserted between the staple 1001 and the bundle of sheets 1002 when the bundle of sheets 1002 is stapled. and an operating claw 1012.

The staple extractor 1010 has a extractor main body 1020, and the extractor main body 1020 is movably equipped with a claw unit 1030.

The claw unit 1030 includes a movable bracket 1031 that is movable, and a swing bracket 1032 that is swingable relative to the movable bracket 1031. A fixed claw 1011 is fixed to the lower side of the movable bracket 1031, and a fulcrum shaft 1033 and a guide shaft 1034 are fixed to the side.

The swing bracket 1032 is swingable about a fulcrum shaft 1033, and is provided with an operating claw 1012 on one side and a swing roller 1035 on the other side.

A relief notch 1032a is formed in the swinging bracket 1032, and the relief notch 1032a is configured not to interfere with the guide shaft 1034 when the swinging bracket 1032 swings.

A spring 1036 is provided between the moving bracket 1031 and the swinging bracket 1032, and the swinging bracket 1032 always urges the operating claw 1012 in the direction of the fixed claw 1011 by the spring 1036.

The extractor body 1020 is formed with a guide groove 1020a and a guide groove 1020b that extend in the direction in which the claw unit 1030 moves. A fulcrum shaft 1033 is movably engaged with the guide groove 1020a, and a guide shaft 1034 is movably engaged with the guide groove 1020b. movably engaged.

A spring 1037 is provided between the movable bracket 1031 and the extractor main body 1020, and the spring 1037 always biases the movable bracket 1031 to be located at the initial position.

The extraction tool main body 1020 is provided with an operating lever 1040. This operating lever 1040 is operated using an operating shaft 1041 as a fulcrum.

The operating lever 1040 includes a cam portion 1040a that pushes a guide shaft 1034 provided on the movable bracket 1031, and a guide portion 1040b that pushes a swing roller 1035 provided on the swing bracket 1032.

The cam portion 1040a has a pressing surface 1040a1 and an arcuate surface 1040a2. The pushing surface 1040a1 is a flat surface and contacts the guide shaft 1034. The arc surface 1040a2 is an arc of a circle M having the operation axis 1041 as the center point.

When the operating lever 1040 is operated, the pushing surface 1040a1 pushes the guide shaft 1034 and moves the claw unit 1030 forward. When the claw unit 1030 moves forward and reaches a predetermined position, that is, the extraction position, the arcuate surface 1040a2 from the pressing surface 1040a1 comes into contact with the guide shaft 1034. The arc surface 1040a2 is an arc of a circle M having the operating shaft 1041 as its center point, so it does not push the guide shaft 1034. In this way, the cam portion 1040a of the operating lever 1040 is configured such that its shape does not change in the front and back positions of the claw unit 1030 during the extraction operation by the operating claw 1012.

The guide portion 1040b has a shape extending in the moving direction of the claw unit 1030, and is formed at a position facing the swinging roller 1035. When the claw unit 1030 moves forward by operating the operating lever 1040, the guide portion 1040b is not in contact with the swinging roller 1035. Further, when the operation lever 1040 is operated and the claw unit 1030 is at a predetermined position, that is, the extraction position, the guide portion 1040b pushes the swinging roller 1035, so the swinging bracket 1032 swings against the spring 1036. , the operating claw 1012 moves in the extraction direction and separates from the fixed claw 1011.

(Removal of staple removal tool)
The user holds the operation lever 1040 of the staple extractor 1010 with one hand, and aligns the fixed claw 1011 and the operating claw 1012 to the position where they are inserted between the staple 1001 and the stack of sheets 1002.

The staple extractor 10 is in the state shown in FIGS. 45(a) and 46(a), in which the operating claw 1012 is overlapped with the fixed claw 1011, and the operating lever 1040 is in the initial position.

When the operating lever 1040 is operated, the pushing surface 1040a1 pushes the guide shaft 1034, and the claw unit 1030 moves forward against the spring 1037, as shown in FIGS. 45(b) and 46(b). 1011 and operating claw 1012 are inserted between the staple 1001 and the paper bundle 1002.

Furthermore, when the operating lever 1040 is operated, as shown in FIGS. 45(c) and 46(c), when the claw unit 1030 reaches a predetermined position, that is, the extraction position, the circular arc surface 1040a2 moves from the pushing surface 1040a1 to the guide shaft 1034. Since the guide portion 1040b pushes the swinging roller 1035 without moving forward, the swing bracket 1032 swings against the spring 1036, and the operating claw 1012 moves in the extraction direction. and separates from the fixed claw 1011.

In extraction using this staple extraction tool 1010, the fixed claw 1011 has a width W1 that can be inserted between the opposing legs 1001a of the staple 1001, so it corresponds to the bent portion 1001b where the tips of both legs of the staple 1001 are bent. The stack of sheets 1002 is held down. Therefore, when the operating claw 1012 is moved in the pulling direction, the fixed claw 1011 holds down the paper stack 1002 and guides the bent portion 1001b of the staple 1001 in the direction of unbending, so that the staple 1001 is smoothly pulled out from the paper stack 1002 and bent. Damage to the paper when the portion 1001b passes through the paper bundle 1002 is reduced, and the hole remaining after the staple 1001 is removed can be made smaller.

The present invention is applied to a staple removal device and a staple removal tool that remove staples from a paper bundle created by binding multiple sheets of paper using staples, and an image forming apparatus, and has a small number of parts, a simple configuration, and a compact size. Therefore, it is possible to reliably remove staples from a bundle of sheets including saddle-stitched originals.

1 Staple removal device 2 Main body base 3 Main body cover 4 Tip cover 5 Drive button 7 Cover biasing means 10 Device main body 20 Insertion claw 21 Drive plate 30 Staple presser 30a Block main body 30b Holder section 40 Drive means 50 Regulating section 51 Housing 52 Support shaft 53 Regulation hole 54 Biasing means 60 Drive shaft portion 60a One end 60b Other end 61 Support shaft 70 Link mechanism 71 Pair of long links 72 Drive shaft 73 Pair of short links 74 Support body 80 Electric drive source 81 Motor 82 Output Shaft 83 Helical bevel gear 100 Paper bundle holder 110 Motor 111 Belt 112 Roller 120 Silicone 130 Insulating member 140 Actuator 141 Sensor 200 Insertion claw 201 Claw portion 202 Shaft portion 203 Coil 210 Drive means 211 Moving means 212 Current supply means 213 Coil 300 Insertion Nail 310 Driving means 320 Staple presser 330 Operation button 360 Storage box 400 Magnifying glass 500 Image forming device 610 Insertion nail moving means 620 Insertion nail position detection means 630 Staple detection means 640 Operation start means 650 Staple removal means 660 Operation status notification means 670 Control means 700 Drive means 710 Claw unit 720 Moving holder 721 Front protrusion 722 Rear protrusion 730 Support bracket 731 Guide groove 731a Laterally extending portion 731b Upward extending portion 740 Motor 750 Power transmission means 751 Output gear 752 Rotating shaft 753 Umbrella Gear 754 Drive pulley 755 Timing belt 756 Followed pulley 760 Power conversion means 761 Pinion 762 Rack T1 Retracted position T2 inside the apparatus body Removal position outside the apparatus body 1001 Staple 1002 Sheet of paper 1010 Staple extractor 1011 Fixed claw 1011a Wedge part 1011b Opening Section 1012 Operating claw 1012a Wedge portion 1012b Convex portion 1013 Extraction tool main body 1014 Support shaft 1015 Swing holder 1016 Operation lever 1020 Extraction tool main body 1020, 1020b Guide groove 1030 Claw unit 1031 Moving bracket 1032 Swinging bracket 1033 Fulcrum shaft 1034 Guide shaft 1035 Swinging rollers 1036, 1037 Spring 1040 Operating lever 1041 Operating shaft 1040a Cam portion 1040a1 Pushing surface 1040a2 Arc surface 1040b Guide portion

Claims (35)

A staple removal device that removes staples from a stack of sheets bound with staples,
an insertion claw that can be inserted between the staple and the paper surface when the paper stack is placed;
A staple holder that can hold staples,
a drive means for driving the insertion claw and the staple holder;
The driving means includes:
driving the insertion claw inserted between the staple and the paper surface in an outward direction, and pinching the staple between the insertion claw and the staple holder and separating it from the paper stack;
After separating the staple from the paper stack, driving the insertion claw in the opening direction;
A staple removal device characterized in that the staple is released from being held between the insertion claw and the staple holder. The driving means is
a drive shaft part that drivably supports the insertion claw;
a link mechanism that drives the drive shaft portion;
an electric drive source that drives the link mechanism,
The electric drive source is arranged along the central longitudinal direction of the device main body,
driving the insertion claw in the removal direction by the electric drive source via the link mechanism and the drive shaft portion, and separating the staple from the paper stack by sandwiching the staple between the insertion claw and the staple holder;
After the staple is separated from the paper bundle, the insertion claw is driven in a releasing direction via the link mechanism and the drive shaft portion to release the staple from being held between the insertion claw and the staple holder. The staple removal device according to claim 1. In an initial state, a regulating part is provided that forms a gap between the insertion claw and the staple holder,
The regulation department is
a casing that supports the staple holder;
a support shaft connected to the staple holder;
a regulating hole formed in the housing and movably supporting the support shaft between a lower hole position and an upper hole position;
a biasing means for always biasing the support shaft in the direction of the lower hole position via the staple holder;
the support shaft forms a gap between the insertion claw and the staple holder at the lower hole position;
the support shaft moves along the regulation hole and pinches the staple between the insertion claw and the staple holder and separates it from the paper stack;
The support shaft is reversed from the upper hole position, and the insertion claw and the staple holder move toward the lower hole position,
The movement of the support shaft is regulated by the regulation hole at the lower hole position, and the insertion claw moves to form a gap between the insertion claw and the staple holder,
The staple removal device according to claim 1 or 2, characterized in that the staple is opened. a main body base assembled with a device main body including the insertion claw, the staple holder, and the driving means;
A main body cover that covers the device main body, and a tip cover that is attached to the main body cover so as to be movable in a vertical direction,
The staple holder is located above the insertion claw, and the tip of the insertion claw projects downward from the lower surface of the main body base,
The tip cover is always urged downward by a cover urging means,
The lower end of the tip cover covers the tip of the insertion claw, and is configured to move upward when an operator presses the device against the paper stack as the operator inserts the insertion claw. The staple removal device according to claim 3. The tip cover is
5. The staple removing device according to claim 4, wherein the insertion claw is configured to prevent the stack of sheets from being lifted up when the staple is removed from the stack of sheets. The staple removal device according to any one of claims 1 to 3, further comprising a sheet bundle holder that restricts lifting of the sheet bundle when removing the staple from the sheet bundle. The paper stack holder is
7. The staple removing device according to claim 6, wherein the staple removing device is fixed to the main body of the device and is configured to prevent the stack of sheets from rising when the staples are removed from the stack of sheets. The paper stack holder is movable up and down,
7. The staple removing device according to claim 6, wherein the staple removing device is configured to prevent the stack of sheets from rising when the staples are removed from the stack of sheets in the lower position. The staple holder is
The staple removing device according to any one of claims 1 to 8, further comprising an elastic body on the side of the surface that presses the staple. A portion of the insertion claw and a portion of the staple holder can engage with each other in a concave and convex manner,
Insert the insertion claw between the staple and the paper surface in a state where the paper stack is placed,
The staple holder rides on the staple and bends,
further advancing the insertion claw and the staple holder, and the staple holder is removed from the staples;
According to any one of claims 1 to 9, the proper position of the staple is detected when a part of the insertion claw and a part of the staple holder enter into a convex-concave engagement state. Staple removal device. The insertion claw has a recessed part,
Due to the click feeling when the staple engages with the recessed part,
The staple removal device according to any one of claims 1 to 9, wherein the staple removal device detects the proper position of the staple. The insertion claw has an inclined surface on the upper side of the tip,
The staple holder has a reference line, and the staple inserted through the inclined surface of the insertion claw is aligned with the reference line of the staple holder,
The staple removal device according to any one of claims 1 to 9, wherein the staple removal device detects the proper position of the staple. an actuator actuated by a staple;
a sensor that detects a staple; the actuator is actuated by the staple pushing the actuator when the insertion claw is inserted;
The staple removal device according to any one of claims 1 to 9, wherein the sensor detects the proper position of the staple by operation of the actuator. Equipped with notification means,
The staple removal device according to any one of claims 10 to 13, wherein the notification means notifies the user of the detection of the proper position of the staple. comprising control means;
14. The staple removal device according to claim 10, wherein the control means drives the insertion claw and the staple presser by detecting the proper position of the staple. The insertion claw has a notch,
The staple removing device according to any one of claims 1 to 15, wherein a staple remaining in the sheet stack due to incomplete removal is inserted into the notch and removed. A staple removal device that removes staples from a stack of sheets bound with staples,
an insertion claw that can be inserted between the staple and the paper surface when the paper stack is placed;
Driving means for driving the insertion claw,
The driving means is
The insertion claw inserted between the staple and the paper surface is moved from a standby position to a removal position,
At the removal position, the insertion claw is energized to separate the staple from the paper stack, and the insertion claw is applied with a magnetic force to hold the staple;
A staple removal device characterized in that the staple is released from holding the staple by cutting off electricity to erase the magnetic force applied to the insertion claw. A staple removal device that removes staples from a stack of sheets bound with staples,
an insertion claw that can be inserted between the staple and the paper stack in a state where the paper stack is placed;
The insertion claw has a shape with an upper inclined surface that is pointed toward the tip,
moving the insertion claw along the surface of the paper stack;
A staple removal device characterized in that the staple is separated from the paper bundle by a height change caused by an upper inclined surface of the insertion claw. The staple removal device according to claim 18, further comprising a staple holder capable of holding the staple. The staple removal device according to claim 18 or 19, further comprising a drive means for moving the insertion claw along the surface of the paper bundle. The staple removing device according to any one of claims 1 to 20, further comprising a storage box for storing the staples removed from the paper bundle. The staple removing device according to any one of claims 1 to 21, further comprising a magnifying glass that displays a state in which the staple is removed from the paper bundle. The power source for driving the driving means is
The staple removal device according to any one of claims 1 to 22, characterized in that it is an AC power source connected to a commercial power supply or a DC power source connected to a built-in battery. The staple removal device according to any one of claims 1 to 23, characterized in that the staple removal device has a configuration of a horizontal operation type or a vertical operation type. The insertion claw is movable between a retracted position within the device main body and a removal position outside the device main body,
an insertion nail moving means for moving the insertion nail;
an operation state notification means for notifying the operation state of the insertion claw;
an operation start means for starting the operation of the operation claw;
Before power is turned on, the insertion claw is located at the retracted position,
When power is turned on, the insertion claw is moved from the retracted position to the removal position by the insertion claw moving means;
Notifying the operating state of the insertion claw by the operating state notification means,
Start the operation of the operation claw by the operation start means to remove the staple, and after the removal is completed and a specified time elapses,
25. The staple removal device according to claim 1, wherein the insertion claw is moved from the removal position to the retracted position by the insertion claw moving means. The operation state notification means is configured to notify the operation state of the insertion claw,
26. The staple removal device according to claim 25, further comprising: a notification that the use can be started after the power is turned on, and a notification that the removal is possible after the insertion nail is inserted. A staple removal device that removes staples from a stack of sheets bound with staples,
an insertion claw that can be inserted between the staple and the paper surface when the paper stack is placed;
A staple holder that can hold staples,
a driving means for moving back and forth a claw unit including the insertion claw and the staple holder;
The driving means is
By moving forward, the insertion claw is inserted between the staple and the sheet surface, and by further moving forward, the claw unit is tilted upward to sandwich the staple between the insertion claw and the staple holder and separate it from the paper stack. ,
A staple removing device characterized in that the insertion claw is driven in the opening direction by moving backward, thereby releasing the staple from being held between the insertion claw and the staple holder. The claw unit is
It has a front protrusion that moves laterally and vertically and a rear protrusion that moves laterally,
a movable holder that supports the insertion claw and the staple holder;
The driving means is
A motor that serves as a driving source,
a power transmission means for transmitting power from the motor;
a support bracket having a guide groove that allows the front protrusion and the rear protrusion to move;
Converting the rotational force of the motor into linear movement,
The movable holder is advanced to insert the insertion claw between the staple and the paper surface, and further advanced to sandwich the staple between the insertion claw and the staple holder by upward movement of the front protrusion. Separate from the paper stack,
27. The movable holder is moved backward, and the insertion claw is driven in the opening direction by the downward movement of the front protrusion, thereby releasing the staple from being held between the insertion claw and the staple holder. The staple removal device described in . A staple extracting tool for extracting the staples from a stack of sheets bound with staples,
The stapler has a structure in which both opposing legs penetrate the paper stack, and the paper stack is stapled by the two penetrating legs,
a fixed claw and an operating claw that can be inserted between the staple and the paper stack when the paper stack is stapled;
the fixing claw is inserted between the staple and the paper stack;
A staple extracting tool, characterized in that the operating claw extracts the staple from the paper bundle. The fixed claw is
The staple extractor according to claim 29, having a width that allows the staple to be inserted between opposite legs of the staple. fixing the fixing claw to the extractor body;
a swinging holder swingably provided on the extraction tool body;
an operation lever for operating the swing holder;
the swinging holder is provided with the operating claw;
The operation lever is
The staple extractor according to claim 29 or 30, characterized in that the staple is extracted by the operating claw via the swinging holder. A movable claw unit is provided on the extractor body,
fixing the fixed claw to the claw unit;
The claw unit is
includes a rocking bracket that can rock;
the swing bracket is provided with the operating claw;
By operating the operating lever,
advancing the claw unit and inserting the fixed claw and the operating claw between the staple and the paper stack;
By the subsequent operation of the operating lever,
31. The staple extracting tool according to claim 29 or 30, wherein the staple is extracted by the operating claw via the swinging bracket. The operation lever is
a cam portion that moves the claw unit;
a guide portion that pushes the swing bracket;
By operating the operating lever,
the cam portion advances the claw unit;
By the subsequent operation of the operating lever,
The guide section pushes the swing bracket to swing the swing bracket,
33. The staple extractor according to claim 32, wherein the staple is extracted by the operating claw. The cam part is
a cam portion that moves the claw unit;
a guide portion that swings the swing bracket;
The cam portion has a pressing surface and an arcuate surface,
By operating the operating lever,
The pushing surface advances the claw unit, and when the claw unit moves forward and reaches the extraction position, the arcuate surface stops the movement of the claw unit,
34. The staple extractor according to claim 33, wherein when the claw unit is in a stopped state, the guide section swings the swinging bracket and extracts the staple with the operating claw. An image forming apparatus comprising the staple removing device or the staple extracting tool according to claim 1 .