JP2001300866A - Electric stapler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric stapler capable of preventing core deviation from being generated and capable of making the rotating amount of a clincher constant regardless of the thickness of a sheet bundle. SOLUTION: This electric stapler is provided with a driver unit and a clincher unit for clinching leg parts of a staple. The clincher unit is provided with a vertical link mechanism having a clincher base 31 having a clincher and a clincher cam 120, and for vertically moving the clincher base 31 in the perpendicular direction; a first clincher link 101 having one end pivotally attached to a shaft of the clincher cam 120, and the other end pivotally attached to the clincher base 31; and a second clincher link 110 pivotally supported on the first clincher link 101, with one end abutted on the peripheral surface of the clincher cam 120, and the other end vertically moved to rotate the clincher. The second clincher link 110 is rotated by the rotation of the clincher cam 120, and the other end 110A of the second clincher link 110 is vertically moved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an electric motor having a driver unit having a driver for driving staples and a clincher unit having a clincher for clinching a staple leg, wherein the driver unit and the clincher unit are vertically separated. Stapler related.

[0002]

2. Description of the Related Art Conventionally, there has been known an electric stapler capable of binding a sheet bundle discharged from, for example, a copying machine body and discharging the bundle in the same direction as the discharge direction.

In such an electric stapler, a driver unit having a driver for driving staples and the like, and a clincher unit having a clincher for clinching the staple legs are separated.

The clincher unit has a clincher base having a clincher, and a clincher mechanism for rotating the clincher to perform clinching. The clincher base swings up and down with respect to the frame of the clincher unit. That is, one end is pivotally supported, and moves up and down by rotating about this one end.

The clincher mechanism has a clincher member having an intermediate portion pivotally supported by a frame of the clincher unit. One end of the clincher member is in contact with the peripheral surface of the clincher cam, and the clincher cam is rotated. The clincher member is rotated, and the other end of the clincher member is moved up and down by this rotation, whereby the clincher is rotated to perform clinching.

[0006]

In such an electric stapler, the rising position of the clincher base varies depending on the thickness of the sheet bundle. However, since the clincher base moves up and down in a swinging manner, the rising position is increased. However, there is a problem that a so-called misalignment occurs in which the position of the staples driven from the driver unit and the position of the clincher of the clincher base are shifted depending on the thickness of the sheet bundle.

[0007] Further, since the ascending position of the clincher base varies depending on the thickness of the sheet bundle, the distance between the clincher and the other end of the clincher link changes.
The amount of vertical movement of the clincher due to the rotation of the clincher link changes. For this reason, there is a problem that the amount of rotation of the clincher varies depending on the thickness of the sheet bundle.

The present invention has been made in view of the above circumstances, and has as its object to prevent misalignment.
Moreover, an object of the present invention is to provide an electric stapler capable of keeping the amount of rotation of the clincher constant regardless of the thickness of the sheet bundle.

[0009]

To achieve the above object, according to the present invention, there is provided a driver unit having a driver for driving staples toward a sheet bundle, and a staple leg portion penetrating the sheet bundle. A clincher unit having a clincher to clinch by moving, the clincher unit is an electric stapler having a clincher base provided with the clincher, and configured to vertically move the clincher base, The amount of rotation of the clincher is constant regardless of the thickness of the sheet bundle.

According to a second aspect of the present invention, there is provided a driver unit having a driver for driving a staple toward a sheet bundle, and a clincher unit having a clincher for clinching by rotating a leg of the staple penetrating the sheet bundle. The clincher unit is an electric stapler having a clincher base provided with the clincher, and a clincher cam for rotating the clincher, and an up-down link mechanism for vertically moving the clincher base, A clincher link mechanism for keeping the amount of rotation of the clincher constant irrespective of the thickness of the sheet bundle.

According to a third aspect of the present invention, the clincher link mechanism has one end pivotally connected to the shaft of the clincher cam and the other end locked to the clincher base, and the clincher base moves up and down around the axis. A first clincher link that rotates and a rotatable pivotal support at an intermediate position between the first clincher link, one end of which abuts the peripheral surface of the clincher cam, and the other end that rotates up and down to rotate the clincher A second clincher link, wherein the second clincher link is rotated by the rotation of the clincher cam, and the other end of the second clincher link is moved up and down.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electric stapler according to the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 10 denotes an electric stapler which is attached to, for example, a copying machine. The electric stapler 10 includes a driver unit 11 and a clincher unit 20, and the driver unit 11 and the clincher unit 20 are separated. Have been. The sheet bundle is discharged in the direction of the arrow, and the driver unit 11 is actually located at a position close to the clincher unit 20.

The driver unit 11 includes a forming plate (not shown) for forming staples into a U-shape, a driver (not shown) for driving staples formed into a U-shape toward a sheet bundle, and the like. Since the configuration is exactly the same as the conventional one, the description is omitted.

[Clincher Unit] The clincher unit 20 includes a clincher base unit 30 having clinchers 34 and 34 '(see FIG. 3), an up-down link mechanism 50 for vertically moving the clincher base unit 30, and clinchers 34 and 34'. Clincher mechanism 10 that rotates
0 (see FIG. 5) and a drive mechanism (not shown) for driving the mechanisms 50 and 100.

[Clincher Base Unit] As shown in FIG. 2, the clincher base unit 30 includes a clincher base 31 and clincher base guides 40 and 4 fixed to both sides of the clincher base 31 with screws N.
0.

The clincher base 31 has a table 33 having an opening 32, and includes clinchers 34, 34 arranged below the table 33 as shown in FIG. Clinchers 34 and 34 'are shafts 35 and 35'
By rotating in the direction of the arrow around the shafts 35 and 35 ', the legs of the staples penetrating the sheet bundle are clinched.

The clinchers 34, 34 'are formed in a substantially U-shape, and upper portions 34A, 34A' are clinch portions for bending the staple legs, and lower portions 34B, 34 '.
B 'is the contact portion.

The clincher base 31 is provided with a base shaft 36 penetrating therethrough.
Of the clincher base guide 40,
It penetrates through 40 and projects laterally.

Each of the clincher base guides 40 has a protrusion 40A formed rearward and obliquely downward, and a shaft 41 is provided on the protrusion 40A so as to protrude laterally.

The clincher base unit 30 is vertically movable between the frame side plates 21, 21 of the clincher unit 20, and each frame side plate 21 has guide holes 22, 25 (see FIG. 1) extending vertically. Is formed. Both ends 36 </ b> A of the base shaft 36 are inserted into each guide hole 22 so as to be vertically movable along the guide hole 22. A shaft 41 is inserted into the guide hole 25 so as to be vertically movable along the guide hole 25.

The clincher base unit 30 has both ends 36 A of the base shaft 36 in the guide holes 22 and the shaft 41.
Are vertically guided by the guide holes 25, respectively.

[Up / Down Link Mechanism] Up / Down Link Mechanism 50
As shown in FIGS. 1 and 4, a link cam 52 mounted on a drive shaft 51 rotated by a motor (not shown) of a drive mechanism (not shown), a first link member 53, and a second
A link member 60 and a third link member 70 are provided. The vertical link mechanism 50 is provided for the clincher unit 20.
Are provided outside the both frame side plates 21.

The upper portion of the first link member 53 is rotatable about an axis 54 of the frame side plate 21. A roller 55 is rotatably provided at an intermediate portion of the first link member 53, and the roller 55 is in contact with a peripheral surface 52 </ b> A of the link cam 52. A shaft 56 is provided below the first link member 53, and the shaft 56 is movably inserted into the long hole 61 of the second link member 60 along the long hole 61. One end of a spring 57 for adjusting the paper thickness is connected to the shaft 56, and the other end of the spring 57 is fixed to the frame side plate 21.

The first link member 53 is urged counterclockwise about the shaft 54 by the urging force of the spring 57, and the roller 55 is constantly in contact with the peripheral surface of the link cam 52.

An elongated hole 61 for adjusting the paper thickness is formed at a rear portion of the second link member 60, and a front end portion 60A is rotatably connected to a lower portion 70A of the third link member 70.

The third link member 70 is formed in a substantially triangular shape, and has an upper end 70B pivotally attached to the frame side plate 21 so as to be rotatable around an axis 71. A long hole 72 extending obliquely is formed in the front end 70C of the third link member 70, and the base shaft 36 is formed in the long hole 72.
36A is movably inserted along the elongated hole 72.

The position shown in FIG.
And an initial position (home position) of the clincher base 31.

[Clincher Link Mechanism] As shown in FIGS. 2 and 5, the clincher link mechanism 100 includes a first clincher link 101 and a second clincher link 110.
And a clincher cam 120. The clincher link mechanism 100 is provided inside each of the frame side plates 21 of the clincher unit 20.

The first clincher link 101 is formed in a substantially rectangular shape, and the rear end portion 101A is
1 and is rotatable around a drive shaft 51. Further, a long hole 102 is provided at the tip end (other end) 101B, and the base shaft 3 is provided in the long hole 102.
The end 36 </ b> A of No. 6 is movably inserted along the elongated hole 102. That is, the distal end portion 101B is in a state of being locked to the clincher base 31.

The second clincher link 110 is formed substantially in the shape of a letter, and has an intermediate portion attached to an intermediate position of the first clincher link 101 by a shaft 111, so that the second clincher link 110 is rotatable about the shaft 111. I have. Further, the tip portion 110A of the second clincher link 110 has entered the clincher base 31. This tip 110 is
As shown in FIG. 3, the other clincher link mechanism 100
Of the second clincher link (not shown)
Is connected by a connecting portion 110R.
At the center of R, a protruding portion 110T protruding upward is formed. The protrusion 110T is used as the clincher 34,3.
4 ′ is in contact with the contact portions 34B, 34B ′. The roller 11 is attached to the rear end 110B of the second clincher link 110.
2 is provided rotatably.

The clincher cam 120 is disposed between the first clincher link 101 and the second clincher link 110 and is fixed to the drive shaft 51. The clincher cam 120 has a circular portion 121 and a protruding portion 122, and the positions shown in FIG. 5 indicate initial positions (home positions) of the clincher cam 120 and the clincher base 31.

[Operation] Next, the operation of the electric stapler 10 of the above embodiment will be described.

When a sheet bundle (not shown) is discharged from a copying machine (not shown) and a spelling signal is output from the copying machine, the motor of the driving mechanism is driven and the drive shaft 51 rotates counterclockwise. Go. Link cam 5 with rotation of drive shaft 51
2 also rotates counterclockwise. The rotation of the link cam 52 causes the first link member 53 to rotate clockwise about the shaft 54.

The clockwise rotation of the first link member 53 causes the third link member 70 via the second link member 60 to rotate.
Rotates clockwise about the shaft 71. Due to the clockwise rotation of the third link member 70, the clincher base 31 moves upward as shown in FIG.

Further, as the link cam 52 rotates, the clincher base 31 reaches the top dead center as shown in FIG.
A.

By the way, both ends 3 of the base shaft 36
6A is guided in the guide hole 22 and the shaft 41 is guided in the guide hole 25, so that the clincher base 31 rises in the vertical direction. Therefore, the rising position of the clincher base 31 differs depending on the thickness of the sheet bundle S. Also, the driving portion 11A of the driver unit 11 and the clincher base 31
The vertical positional relationship with the clinchers 34 and 34 'does not shift. That is, no misalignment occurs.

The driving section 1 of the driver unit 11
Staples are launched from 1A. The struck legs of the staples penetrate the sheet bundle S and enter the openings 32 of the clincher base 31.

On the other hand, the rotation of the drive shaft 51 causes the clincher cam 120 to pivotally move from the position shown in FIG. 5 to the position shown in FIG. Further, the first clincher link 101 rotates clockwise about the drive shaft 51 as the clincher base 31 moves up. Second clincher link 11
The protrusion 110T of the first clincher link 101 is attached to the first clincher link 101 by the second clincher link 110 being attached to the first clincher link 101 by the shaft 111.
With the rotation of, it is raised to the position shown in FIG.

When the drive shaft 51 further rotates, the clincher cam 120 further rotates counterclockwise with the drive shaft 51 from the position shown by the broken line in FIG.
Due to the rotation of the clincher cam 120, the protrusion 122 of the clincher cam 120 comes into contact with the roller 112 of the second clincher link 110 as shown in FIG. As a result, the second clincher link 110 rotates clockwise about the shaft 111.

By the clockwise rotation of the second clincher link 110, the protruding portion 110T of the second clincher link 110 rises and the contact portion 34 of the clinchers 34
B, 34B 'is pushed upward. This push-up causes the clinchers 34, 34 'to rotate in the direction of the arrow. Due to the rotation of the clinchers 34 and 34 ', the staple legs that have entered the openings 32 of the clincher base 31 are clinched.

The position at which the clincher base 31 is raised differs depending on the thickness of the sheet bundle S. However, since the second clincher link 110 is attached to the first clincher link 101, the second clincher link 110 is provided.
The relative position between the clincher link 101 and the first clincher link 101 is always constant irrespective of the raised position of the clincher base 31 as shown in FIGS. For this reason, the second clincher link 11 is independent of the raised position of the clincher base 31.
The rotation amount of 0 is constant, and the rising amount of the protruding portion 110T is constant. As a result, the amount of rotation of the clinchers 34 and 34 'is always constant irrespective of the thickness of the sheet bundle S, and the leg portions of the staples penetrating the sheet bundle S are surely fixed by a predetermined amount regardless of the thickness of the sheet bundle S. The sheet bundle S can be folded, and it is possible to reliably prevent the binding method of the sheet bundle S from being insufficient due to its thickness.

Further, since the clincher base 31 can move up and down in the vertical direction with respect to the driver unit 11, the legs of the staples penetrating the sheet bundle S surely enter the openings 32 of the clincher base 31. The leg portions can be reliably bent by the clinchers 34 and 34 '. That is, it is possible to reliably clinch.

When the sheet bundle S is thick, for example, the rise of the clincher base 31 stops at the position shown in FIG. 6, but the first link member 53 is pivotally moved about the shaft 54 against the urging force of the spring 57. Since the first link member 53 rotates as shown in FIG. 11, the link cam 52 can rotate with the drive shaft 51 without being locked, and the sheet bundle can be rotated. Even when S is thick, the staples can be reliably clinched.

[0045]

As described above, according to the present invention, the vertical alignment between the clincher base and the driver unit can be reliably performed even if the position of raising the clincher base varies depending on the thickness of the sheet bundle. Therefore, the leg portion of the staple penetrating the sheet bundle can be reliably bent by the clincher. Further, since the amount of rotation of the clincher is always constant irrespective of the thickness of the sheet bundle, the legs of the staples penetrating the sheet bundle can be reliably bent by a predetermined amount regardless of the thickness of the sheet bundle. It is possible to reliably prevent the binding of the bundle from being insufficient due to its thickness.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a clincher unit of an electric stapler according to the present invention.

FIG. 2 is a perspective view showing a clincher base unit and a clincher mechanism.

FIG. 3 is an explanatory diagram showing a clincher.

FIG. 4 is an explanatory diagram showing a configuration of a link mechanism.

FIG. 5 is an explanatory diagram showing a configuration of a clincher mechanism.

FIG. 6 is an explanatory diagram showing a state in which the clincher base is raised by a link mechanism.

FIG. 7 is an explanatory view showing a state in which the clincher base has been raised to a top dead center by a link mechanism.

FIG. 8 is an explanatory diagram showing a relative positional relationship between a first clincher link and a second clincher link when the clincher base has risen to a top dead center.

FIG. 9 is an explanatory diagram showing the position of a second clincher link when clinching is performed.

FIG. 10 shows a state in which the first position of the clincher base is increased regardless of the raised position
It is explanatory drawing for showing that the relative positional relationship of a clincher link and a 2nd clincher link does not change.

FIG. 11 is an explanatory diagram showing a state in which paper thickness adjustment has been performed.

[Explanation of symbols]

 31 clincher base 101 first link member 110 second link member 110A other end 120 clincher cam 138 clinch plate (clincher) 150 holding mechanism (holding means)

Claims (3)

[Claims] 1. A driver unit having a driver for driving staples toward a sheet bundle, and a clincher unit having a clincher for clinching by rotating legs of the staples penetrating the sheet bundle.
The clincher unit is an electric stapler having a clincher base provided with the clincher, wherein the clincher base is configured to vertically move up and down, and regardless of a thickness of the sheet bundle, a rotation amount of the clincher is controlled. An electric stapler characterized by being constant. 2. A driver unit having a driver for ejecting staples toward a sheet bundle, and a clincher unit having a clincher for clinching by rotating a leg of the staple penetrating the sheet bundle.
The clincher unit is an electric stapler having a clincher base provided with the clincher, and a clincher cam for rotating the clincher, and an up-down link mechanism for vertically moving the clincher base, and the sheet bundle. And a clincher link mechanism for keeping the amount of rotation of the clincher constant irrespective of the thickness of the stapler. 3. The clincher link mechanism according to claim 1, wherein one end of the clincher link mechanism is pivotally connected to the shaft of the clincher cam, and the other end is locked by the clincher base, and is rotated about the axis by vertical movement of the clincher base. A clincher link, and a second clincher link rotatably pivotally supported at an intermediate position of the first clincher link, one end of which abuts on the peripheral surface of the clincher cam, and the other end of which vertically rotates the clincher. The electric stapler according to claim 2, further comprising: rotating the second clincher link by rotating the clincher cam to move the other end of the second clincher link up and down.