JP3518428B2 - Electric stapler - Google Patents

Description

Detailed Description of the Invention

[0001]

[Field of the Invention The invention comprises a driver unit having a driver hammer out the staple, to an electric stapler provided with a clincher unit having a clincher for clinching legs of the staple.

[0002]

2. Description of the Related Art Conventionally, for example, an electrically driven sheet stack for discharging a sheet bundle discharged from a copying machine body at an arbitrary position .
The taper is known.

In such an electric stapler , a driver unit (driver device) having a driver for ejecting staples and the like, and a clincher unit (clincher device) having a clincher for clinching the legs of the staple are separated. The clincher unit is movably provided along a guide rail provided in a direction orthogonal to the sheet bundle discharging direction, and the clincher unit is provided movably along a guide rail provided in parallel with the guide rail. The driver unit and clincher unit are
It is arranged at a position that sandwiches the discharged sheet bundle,
By moving along the guide rail, the sheet bundle discharged from the copying machine main body can be closed at an arbitrary position.

According to this electric stapler , since it is not necessary to move the driver unit and the clincher unit each time the sheet bundle is ejected, the sheet bundle can be closed in a short time, and a high speed copying machine can be supported. .

[0005]

However, in such an electric stapler , since the driver unit and the clincher unit move along the guide rail, the guide rail is bent and the guide rail is attached to the copying machine body. As a result, the driver unit and the clincher unit may deviate from each other in the front-rear direction (sheet bundle discharging direction). When this deviation occurs, when the clincher of the clincher unit clinches the legs of the staples, the staples are clinched while falling in the front-rear direction, and there is a problem that sufficient clinching is not performed.

The present invention has been made in view of the above problems, and an object thereof is to provide an electric stapler capable of reliably clinching staples even if the driver device and the clincher device are displaced in the front-rear direction. It is in.

[0007]

To achieve the above object, according to an aspect of, the invention of claim 1, the driver having a driver hammer out the staple formed into the forming plate and the U-shaped to form the staples into a U-shape A unit,
In an electric stapler having a clincher unit having a clincher for clinching the legs of staples punched out and penetrating the sheet bundle, holding means for sandwiching and holding the legs of the staple penetrating the sheet bundle is provided. sandwiches the staple legs by means
After being held by, the leg portion of the staple is clinched by the clincher.

The invention of claim 2 is characterized in that the holding means is provided in a clincher unit.

[0009]

DETAILED DESCRIPTION OF THE INVENTION below, electric stearyl related to the present invention
An embodiment of a stapler will be described with reference to the drawings.

[0010] In FIG. 1, 10 is an electric stapler mounted to, for example, a copying machine or the like, the electric Suthep
The la 10 includes a driver unit 11 and a clincher unit 100. The driver unit 11 is movable in the arrow P1 direction along a guide rail (not shown), and the clincher unit 100 is also movable in the arrow P1 direction along a guide rail (not shown). The sheet bundle Q from the copying machine is discharged in the direction of arrow P2.

[Driver unit] Driver unit 1
As shown in FIG. 2, 1 has a housing 14 formed by attaching a frame 13 having a hat-shaped cross section to a plate 12, and this housing 14 is attached to the guide rail so as to be movable along the guide rail. Has been.

A cartridge 15 is removably mounted in the housing 14 as shown in FIGS. 3 and 4, and a sheet staple (not shown) is wound around the cartridge 15 and stored. A drive motor 16 is attached to the housing 14, and a drive shaft 17 provided in the housing 14 is driven by the drive motor 16.
Rotates via the reduction gears G1 to G4.

The drive shaft 17 has a driver return cam 18A, a driver cam 18B, a forming plate cam 18C and a forming plate return cam 18D.
And a rotary plate 19 are attached to each cam 18A-
18D rotates together with the drive shaft 17. The driver return cam 18A is arranged outside the plate 12,
Driver cam 18B and forming plate cam 18
C and the forming plate return cam 18D are arranged in the housing 14.

The rotary plate 19 is arranged outside the frame 13. The rotary plate 19 is provided with two notches (not shown), and a photosensor H1 for detecting the notches is provided on the frame 13. The photo sensor H1 is set so as to detect a notch when the driver 24 and the forming plates 22 and 22 to be described later have reached their home positions and when the driver 24 has reached the top dead center.

A forming holder 20 and a driver holder 21 are vertically movable in the housing 14, and a pair of forming plates 22, 22 are attached to the upper part of the forming holder 20. The forming plates 22 and 22 move up and down together with the forming holder 20. The forming plates 22 and 22 are arranged on both sides of a driver 24 described later (see FIG. 6).

As shown in FIG. 5, a pair of protrusions 23, 23 extending in the vertical direction are formed on the upper portion of the driver holder 21, and the pair of elongated holes 25 formed in the driver 24 are the protrusions 23, 23. Has been inserted into. The long hole 25 extends in the vertical direction, and a gap L1 having a predetermined length is formed between the upper end of the long hole 25 and the upper end of the protrusion 23. This gap L1
The protrusion 23 is movable along the long hole 25 by an amount. Therefore, the driver 24 moves together with the driver holder 21 after the driver holder 21 moves by the gap L1.

The driver holder 21 has a structure shown in FIGS.
As shown in, the cam floor 26 is provided, and the cam floor 26 is in contact with the peripheral surface of the driver cam 18B. The forming holder 20 is provided with a cam floor 27, and the peripheral surface of the forming plate cam 18C is in contact with the cam floor 27. Due to these contact, the driver cam 18B and the forming plate cam 1
The forming holder 20 and the driver holder 21 are raised with the rotation of 8C.

Further, bent portions 28 and 29 are formed on the forming holder 20 and the driver holder 21, and the bent portions 28 and 29 come into contact with the driver return cam 18A and the forming plate return cam 18D. . When the forming holder 20 and the driver holder 21 are in the home position, that is, when the forming plates 22, 22 and the driver 24 are located at the top dead center, the cams 18A to 18D are in the positions shown in FIG. When each of the cams 18A to 18D is rotated by about 90 degrees, the forming holder 20 and the driver holder 21 are moved to the bottom dead center by the driver return cam 18A and the forming plate return cam 18D.

A bearing portion 31 is provided on the driver holder 21, and a shaft 32 is fixed to the bearing portion 31.

A bearing portion 33 is provided on the outer upper portion of the plate 12 as shown in FIG. 2, and a shaft 34 is fixed to the bearing portion 33. Anvil 40 is attached to this shaft 34.
The lower part of is pivotally supported.

[Anvil] As shown in FIG. 9, the anvil 40 includes a pair of side plate portions 42 provided on both sides of the connecting portion 41.
43, and guide portions 44, 45 projecting to the left side are formed at the lower portions (in FIG. A) of the side plate portions 42, 43, and at the tips of the guide portions 44, 45, inclined surfaces 44A,
45A is formed. Flat receiving portions 44B and 45B are formed on the inclined surfaces 44A and 45A.
A guide portion 48 having an inclined surface 48A is provided between the side plate portions 42, 43, and the inclined surface 48A has the same inclination angle as the inclined surfaces 44A, 45A and is in the same plane.

The guide portions 44, 45, 48 are the plates 1
The notches 35 to 37 formed in the upper part of the No. 2 project inward.

Inclined elongated holes 46, 47 are provided in the middle of the side plate portions 42, 43, and the shaft 32 of the bearing 31 is inserted into the elongated holes 46, 47. In addition, holes 42A and 43A are formed in the upper portions (in FIG. 9) of the side plate portions 42 and 43.
Are provided in the holes 42A and 43A.
The shaft 34 is inserted, and the anvil 40 is rotated around the shaft 34 according to the vertical movement of the driver holder 21.

Then, when the driver 24 is located at the home position, that is, when the driver 24 is located at the top dead center, the guide portions 44, 4 of the anvil 40 are provided.
When the driver 24 is located at the bottom dead center, the guide portions 44, 4 of the anvil 40 are located in the notches 35-37 of the plate 12 (see FIG. 10).
5, 48 project from the notches 35-37 of the plate 12 (see FIG. 6).

[Feed Lever] As shown in FIG. 4, a feed lever 51 that rotates around a shaft 50 is provided in the housing 14.
Is provided, and a triangular protrusion 52 having inclined surfaces 52A and 52B is formed on the side (left side in FIG. 4) of the feed lever 51. Also, the feed lever 5
A protrusion 53 that protrudes upward is formed on the upper portion of 1. The feed lever 51 is biased by a spring (not shown) so as to rotate counterclockwise, and the forming holder 20 presses the inclined surface 52A of the projecting portion 52 to resist the biasing force. Feeding lever 5
1 rotates clockwise. That is, the feed lever 51 is rotated in the arrow direction by the vertical movement of the forming holder 20.

[Cartridge] The cartridge 15 has a conveyance path 62 for feeding the staple T to the ejection section 61, and a slider 63 which can reciprocate in the left-right direction along the conveyance path 62.
And have. The side wall 64 forming the transport path 62 is provided with a check claw 65, and the slider 63 is provided with a feed claw 66.
Is provided. Further, the slider 63 is formed with a concave portion 67 with which the projection 53 of the feed lever 51 is engaged, and the slider 63 reciprocates in the left-right direction when the feed lever 51 rotates in the arrow direction. .

When the slider 63 moves to the left, the staples T are sent to the ejecting section by the feeding claws 66, and the slider 6 is moved.
When 3 moves to the right, the check claw 65 prevents the staple T from being sent back to the right together with the slider 63.

[Clincher Unit] As shown in FIGS. 11 to 14, the clincher unit 100 includes a flat base plate 101 and a frame 10 having a hat-shaped cross section.
The housing 103 is formed by attaching 2 with screws (not shown), a clincher body 120 that moves up and down in the housing 103, and a drive mechanism 300 that moves the clincher body 120 up and down.

As shown in FIG. 15, the base plate 101 has rectangular holes 105, 105 extending vertically on both sides.
And an elongated hole 106 extending vertically in the lower part of the middle of the holes 105, 105, and the shaft hole 10 on the elongated hole 106.
7 are formed.

In the frame 102, as shown in FIG. 16 (A), the holes 105 of the base plate 101 and the long holes 106 are formed.
Holes 111, 111, a long hole 112, and a shaft hole 113 are formed to face the shaft hole 107.

[Clincher body] The clincher body 120 is
A pair of substrates 121, 1 that move up and down in the housing 103
21 (see FIG. 17), a clincher member 130 (see FIG. 18) that is attached to the substrates 121 and 121 so as to be vertically movable and extends in the vertical direction, and a substrate 121 at a position sandwiching the tip end portion of the clincher member 130. And a pair of holding members (holding means) 150 for holding the legs of the staples and a pair of arm members 200, 200 for vertically moving the substrates 121, 121.

[Substrate] As shown in FIG. 17, on each substrate 121, elongated holes 121A to 121E extending vertically (horizontally in FIG. 17) are formed in this order from the right (in FIG. 17). ing. The rear part of the substrate 121 (see FIG. 17).
On the right side of the drawing), a protruding portion 122 protruding rearward is formed, and a rectangular hole 123 is formed in this protruding portion 122. A connecting plate 124 (see FIG. 13) is fitted in the hole 123, and the pair of substrates 121, 121 are connected by the connecting plate 124.

Further, projecting portions 125 and 125 are formed on both sides of the rear portion of the substrate 121, and these projecting portions 125 and 12 are formed.
Shafts 126 and 126 (see FIG. 14) are attached to the shaft 5. Further, the shaft 127A to the front end side of the substrate 121
127D and 128A to 128D are attached.
The shafts 127A to 127C and 128A to 128C and the connecting plate 124 are attached to the pair of substrates 121 and 121 so as to face each other at positions separated by a predetermined distance.

[Clincher member] Clincher member 130
Is a pair of holding plates 131, 131 as shown in FIG.
And a clinch plate (clincher) 138 sandwiched between the end portions of the holding plates 131, 131, and the holding plates 131, 13
It is composed of a U-shaped connecting member 1133 having the rear portion of the first connecting portion.

On the holding plate 131, as shown in FIG.
Long hole 13 extending vertically (left and right in FIG. 19)
2, 133 are formed, and beside the long hole 123, the upper part (see FIG.
8) is provided with a protruding pin 134.

A predetermined gap is formed between the holding plates 131 and 131, and a drive cam 3 to be described later is provided in this gap.
01 is arranged. Drive shaft 308 of drive cam 301
Penetrates through the long hole 132 of the holding plate 131, and the long hole 132 allows the clincher member 130 to move in the vertical direction (left and right direction in FIG. 18) with respect to the drive shaft 308.

The clincher member 130 includes the substrates 121, 1
It is arranged between the two and is movable up and down with respect to the substrates 121, 121.

As shown in FIG. 13, a shaft member 136 extending rearward is fixed to the connecting member 1133. The shaft member 136 connects the substrates 121, 121 to each other.
Penetrates 24. Connecting member 1133 and connecting plate 124
A spring 137 is attached to the shaft member 136 between and, and the clincher member 130 is biased in the distal direction by the spring 137. Further, as shown in FIG. 18, a shaft 139 extending in the up-down direction is inserted through the connecting member 1133 and the holding plates 131, 131,
Both ends of the shaft 139 are formed in the long holes 12 of the substrates 121 and 121.
It is inserted in 1A.

[Arm member] A pair of arm members 200, 200 extending laterally so as to sandwich the housing 103 is provided outside the housing 103. The arm members 200, 200 are shaft members 201, 201, 20.
Connected by two. The shaft members 201, 201 are
Holes 1 provided in the base plate 101 and the frame 102
The shaft member 202 penetrates the inside of the base plate 10
1 and the long holes 106 and 112 of the frame 102 and the substrate 1
21 and the long holes 121C and 133 of the holding plate 131 are penetrated, and the arm members 200 and 200 are the housing 10
It can move up and down with respect to 3.

Springs S1 and S1 are provided between the shaft members 201 and 201 and the shafts 126 and 126 provided on the substrate 121, and the arm members 200 and 200 and the substrate 121 are mutually connected by the springs S1 and S1. It is urged to pull each other. Arm members 200, 20
When 0 moves up and down, the substrate 121 moves up and down via the springs S1 and S1.
The vertical movement of 0,200 is performed by a drive mechanism 300 described later.

[Holding Mechanism] As shown in FIGS. 20 and 21, the holding mechanism 150 includes a pair of holding members 153, 153 attached to shafts 127A, 127B, 128A, 128B attached to the tip of the substrate 121. 163,1
63, clincher guides 180, 180, reset guides 190, 190, and springs S2, S2 for urging the holding members 153, 153, 163, 163 in a direction to clamp the leg portion of the staple.

[Holding Member] The holding member 153 has a shaft 128.
It has a plate-shaped base 155 having a hole 154 into which B is inserted, and the shaft 1 is attached to the upper end (in FIG. 20) of this base 155.
A plate-shaped holding portion 156 extending in the direction of 28B is formed. The diameter of the hole 154 is set larger than the diameter of the shaft 128B. As shown in FIG. 22, a concave portion 157 for holding the leg portion Tb of the staple is formed at the tip of the holding portion 156.

A connecting portion 158 is provided on the side of the base portion 155.
Is bent and, as shown in FIG. 23, the connecting portion 15
A plate-shaped contact portion 159 is formed in the rear portion of the plate 8 in parallel with the base portion 155. This contact portion 159 has a hole 15
9A is formed, and a shaft 128A is inserted into the hole 159A, and the holding members 153 and 153 move along the shafts 128A and 128B in a direction of moving away from each other or approaching each other. The diameter of the hole 159A is set larger than the diameter of the shaft 128A. The shaft 128A is provided with springs S2 and S2, and the holding member 1
53 and 153 are urged toward each other.

A guide portion 159G inclined outward is formed at the rear of the contact portion 159, and the guide portions 159G and 159G widen upward (in FIG. 23). The guide portions 159G and 159G are reset guides 1
The guide portion 191 of 90 is guided between the contact portions 159, 159.

Since the holding member 163 has the same structure as the holding member 153, the description thereof will be omitted.

[Reset Guide] Reset Guide 19
As shown in FIG. 14, 0 and 190 are fixed inside the side walls 108 and 108 of the frame 102 by screws B1. The reset guides 190, 190 are provided with flat plate-shaped guide portions 191, 191. The guide portions 191, 191 are provided with recesses 192, 192, respectively, and the shafts 127A, 128A are inserted into the recesses 192, 192. It has become.

[Clincher Guide] Clincher Guide 1
Reference numeral 80 denotes a shaft 127B, 1 provided between the substrates 121, 121.
28B is rotatably attached. As shown in FIGS. 23 and 24, the clincher guide 180 has a tip end portion 156, 1 for holding members 153, 153.
A guide portion 181 is formed so as to enter between the 56 and keep the sandwiching portions 156 and 156 open. As shown in FIG. 23, the thickness of this guide portion 181 is formed thinner than other portions, and the boundary of the guide portion 181 is a step portion 182. With this step portion 182, the guide portion 181 of the clincher guide 180 is held more than necessary by the holding members 153.
It is regulated so as not to enter too much between the holding portions 156 and 156 of 153.

The guide portion 181 is formed with an inclined surface 183 for guiding the leg portion of the staple penetrating the sheet bundle to the clinch plate 138. Further, on the side of the clincher guide 180, a protruding portion 184 that abuts on a corner portion of the tip end portion of the clincher plate 138 is formed.

The clincher guides 180, 180 are shown in FIG.
As shown in FIG. 4, the guide portions 181 and 181 are held by the springs S3 and S3.
It is urged in a direction to enter between the sandwiching portions 156, 156, 166, 166 of 3,163.

[Drive Mechanism] The drive mechanism 300, as shown in FIG. 13, includes a drive cam 301, gears 302 to 305 for rotating the drive cam 301, and a drive motor 307. The drive cam 301 is attached to a drive shaft 308 provided in the housing 103, and comes into contact with the shaft member 202 of the arm members 200, 200 to move the arm members 200, 20 up and down.

A rotary plate 350 is attached to the drive shaft 308 as shown in FIG. 11, and two cutouts 351 and 352 are formed in the rotary plate 350.
The photosensor H2 for detecting the 1,352 is the base plate 101.
It is provided in. When the clincher body 120 is located at the home position shown in FIG. 14, the photo sensor H2
Detects the notch 351, and when the drive cam 301 comes to the position of FIG. 26, the photo sensor H2 is set to detect the notch 352.

A projection 31 is formed on the side surface 311 of the drive cam 301.
2 is provided, and as shown in FIG.
12, the inclined surfaces 312A and 312A are formed, and the projection 31
2 has a triangular cross section. On the other hand, as shown in FIG. 25, a stopper 320 is fixed to the inner side surface of the substrate 121 via a spacer 313, and the stopper 320 is elastically deformed to be bent back as shown in FIG.

The drive cam 3 is provided at the tip of the stopper 320.
The bent portion 321 abutting on the side surface 311 of 01 is formed,
In addition, a protrusion 322 is provided on the side of the tip of the stopper 320.
Are formed. A pin 134 provided on the holding plate 131 of the clincher member 130 is in contact with the protruding portion 322, and the clincher member 130 is biased toward the tip end by the spring 123. Has stopped.

By the rotation of the drive cam 301, the protrusion 312
When comes to the position of the bent portion 321 of the stopper 320, the bent portion 321 rides on the protrusion 312 along the inclined surface 312A, and the stopper 320 warps back to make the pin 134.
Is disengaged from the protruding portion 322 of the stopper 320. Pin 13
When 4 is disengaged from the protrusion 322, the clincher member 130
Moves toward the tip end due to the urging force of the spring 137. By this movement, the clincher plate 138 of the clincher member 130 clinches the leg portion of the staple.

Further, the drive cam 301 includes the holding plates 131, 1
The clincher member 130 that has moved to the front end direction by contacting the roller 139R provided on the shaft 139 of 31 is returned to the initial position (home position) and the clincher body 120 is returned to the home position.

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

When the drive motor 16 of the driver unit 11 is stopped, as shown in FIGS. 7 and 8, the driver 24 and the forming plates 22, 22 are located at the home position which is the top dead center. At this time,
As shown in FIGS. 10 and 27, the guide portions 44, 45, and 48 of the anvil 40 are formed in the notches 35 to 37 of the plate 12.
It is in a state of being pulled in. In addition, the slider 63
Is located at the position shown in FIG. 27 by the feed lever 51.

On the other hand, at that time, the clincher unit 10
0 and the clincher body 120 are located at the home position shown in FIG.

In this state, when a spelling signal is output from a copying machine (not shown) or the like, the drive motor 16 of the driver unit 11 and the drive motor 307 of the clincher unit 100 are driven, and the drive shaft 17 and the drive shaft 308 rotate. Move.

By rotating the drive shaft 17, each cam 18A-1
8D is rotated, and the forming holder 20 and the driver holder 21 are rotated by the rotation of the driver return cam 18A and the forming plate return cam 18D.
And the forming plates 22, 22 and the driver 24 descend. Furthermore, each cam 18A-18
When D rotates about 90 degrees as shown in FIG. 28, the forming plates 22, 22 and the driver 24 reach the bottom dead center, and the guide portions 44, 45, 48 of the anvil 40 move the plate 12 as shown in FIG. It protrudes inward from the notches 35 to 37.

On the other hand, when the forming holder 20 is lowered, the feed lever 51 is rotated counterclockwise by the urging force of the spring as shown in FIGS.
Move 3 to the left. The leftward movement of the slider 63 moves the staple T of the conveyance path 62 to the ejection portion 61, and the leading staple Ta is moved to the receiving portion 44 of the anvil 40.
It is mounted on the ends of B and 45B.

When the cams 18A to 18D rotate as shown in FIG. 30, the forming plate cam 18 is moved.
Only the forming holder 20 is raised by C,
The forming plates 22 and 22 ascend together with the forming holder 20. Forming plate 2
By raising 2 and 22, the staple Ta is formed into a U-shape as shown in FIG.

On the other hand, the drive cam 301 is rotated by the rotation of the drive shaft 308, and the drive cam 301 is brought into contact with the shaft member 202 of the arm members 200, 200 to rotate and push down the shaft member 202. To go. This shaft member 20
When 2 is pushed down, the arm members 200, 200 are lowered together with the shaft member 202 with respect to the housing 103, and the clincher body 120 is lowered.

When the drive cam 301 rotates from the position shown in FIG. 14 to the position shown in FIG. 26, the leading end of the clincher body 120 contacts the upper surface of the sheet bundle Q as shown in FIG. Then, the photo sensor H2 detects the notch 352, the drive of the drive motor 307 is stopped, and the clincher body 120 is stopped.
Movement is stopped. At this time, as shown in FIG. 20 (B), the reset guides 190, 190 are not attached to the holding member 15.
It is separated from the third guide portions 159G and 159G.

When the sheet bundle Q is thick, the shaft member 202 of the arm members 200, 200 is provided with the elongated holes 106, 112 of the base plate 101 and the frame 102 and the substrate 121.
Also, since it is possible to move in the long holes 121C and 133 of the holding plate 131, it is possible to prevent the arm members 200 and 200 from descending with respect to the substrates 121 and 121 and locking the drive cam 301. That is, the drive cam 301 smoothly rotates regardless of the thickness of the sheet bundle Q.

After the clincher body 120 comes into contact with the sheet bundle Q, the cams 18A to 18D rotate to the positions shown in FIG. When the driver holder 21 is raised by the gap L1 shown in FIG. 5 due to the rotation of the driver cam 18B, the shaft 3
As 2 moves up with the driver holder 21, the anvil 40 shown in FIG. 31 rotates counterclockwise around the shaft 34. Due to the rotation of the anvil 40, the guide portions 44, 45, 48 cause the notches 35-37 of the plate 12 to move.
As it is pulled inward, the leading staple Ta comes off the receiving portions 44B and 45B of the anvil 40 and is guided by the guide portion 4.
The inclined surfaces 44A, 45A and 48A of 4, 45 and 48 are moved to.

When the rise of the driver holder 21 exceeds the gap L1, the driver 24 rises together with the driver holder 21. Due to the rise of the driver 24, the staple Ta formed in a U-shape is ejected from the ejecting portion 61, and as shown in FIG. 33, the leg portion Tb of the staple Ta.
Pass through the sheet bundle Q.

At the time of this penetration, the guide portion 4 of the anvil 40
4, 45 contact the inside of the leg portion Tb of the staple Ta,
Since the forming plates 22 and 22 are in contact with the outside of the leg portion Tb, the driver 24 applies a strong force to the staple T.
It is possible to prevent the leg portion Tb from buckling even when the a is driven out. At the same time, since the guide portion 48 is in contact with the inside of the head portion of the staple Ta, the M-shaped buckling in which the portion between the leg portions Tb and Tb is bent is also prevented.

When each of the cams 18A to 18D is rotated to the position shown in FIG. 8, the driver 24 moves to the top dead center and the staple Ta is completely ejected from the ejecting portion 61, as shown in FIG. The leg portion Tb penetrates the sheet bundle Q. When the driver 24 moves to the top dead center, the photo sensor H1 detects the notch of the rotary plate 19 to stop the drive of the drive motor 16 and stop the rotation of the drive shaft 17 and the cams 18A to 18D.

On the other hand, the staple T penetrating the sheet bundle Q
As shown in FIG. 22, the leg portion Tb of a has a holding member 15
Recesses 157, 15 of the sandwiching portions 156, 156 of 3, 153
7 and the tip portion Tc of the leg portion Tb is shown in FIG.
And, as shown in FIG. 24, the clincher guide 180 contacts the inclined surface 183 of the guide portion 181. The tip portion Tc of the inclined surface 183 is driven by the driver 24.
As shown in FIG. 35, the clincher guides 180, 180 press the springs S3, S as shown in FIG.
It turns in the direction of the arrow against 3.

By the rotation of the clincher guide 180, the guide portion 181 of the clincher guide 180 shown in FIG. 23 is removed from between the holding portions 156, 156 of the holding members 153, 153. As a result, the holding members 153 and 153 cause the shafts 127A and 127B to move by the urging force of the springs S2 and S2.
42, the holding members 153 are inclined with respect to the shafts 127A and 127B, and the recesses 157 and 15 of the holding members 153 and 153 are moved toward each other.
7 holds the leg portion Tb of the staple Ta.
Similarly, the holding members 163 and 163 hold the leg portions Tb of the staple Ta.

The holding member 15 is attached to the leg portion Tb of the staple Ta.
When a force in the direction to spread the holding portions 156 and 156 of the holding members 153 and 153 is applied, the contact portions 1 of the holding members 153 and 153 are held.
59 and 159 are urged in the closing direction by the springs S2 and S2, and due to the difference in diameter between the hole 159A and the shaft 127A and the difference in diameter between the hole 154 and the shaft 127B, as described above,
Since the holding member 153 is held in a state of being inclined with respect to the shafts 127A and 127B, even if a force for expanding the holding portions 156 and 156 is applied, the holding portions 156 and 156 cannot expand. Become. That is, the staple T
It is possible to hold the leg portion Tb of a with a large force.
The same applies to the holding members 163 and 163.

When the staple Ta is further driven by the driver 24 from the state shown in FIG. 35, the tip end portion Tc of the leg portion Tb of the staple Ta is guided to the inclined surface 183 of the clincher guide 180 as shown in FIG. The leg portion Tb is bent into the clinch plate 138 of the clincher member 130. In this way, since the leg portion Tb of the staple Ta is guided to the clinching plate 138 side by the inclined surface 183 of the clincher guide 180, the leg portion Tb of the staple Ta may be bent to the opposite side when the driver 24 drives it. Is prevented, and the legs Tb can be surely bent in the direction in which they are clinched.

When the driver 24 reaches the top dead center, the staple Ta is completely ejected, and the legs Tb of the staple Ta are bent as shown in FIGS. 36 and 37.

When the driver 24 reaches the top dead center, the photo sensor H1 detects the notch in the rotary plate 19, and the drive motor 16 is stopped. Further, the drive motor 307 is driven by the above detection of the photo sensor H1. As a result of this drive, as shown in FIG. 18, the protrusion 312 of the drive cam 301 comes to the position of the bent portion 321 of the stopper 320, and the bent portion 321 rides on the protrusion 312 along the inclined surface 312A, and the stopper 320 warps back and pin 1
34 disengages from the protrusion 322 of the stopper 320. When the pin 134 is disengaged from the protrusion 322, the clincher member 1
30 is moved toward the tip end by the urging force of the spring 137. As a result of this movement, as shown in FIGS. 36 and 38, the clincher plate 138 of the clincher member 130 abuts on the protruding portion 184 of the clincher guide 180 to rotate the clincher guide 180 in the direction of the arrow, and the leg portion Tb of the staple Ta. Finally, as shown in FIG. 39 and FIG. 40, the clinch plate 138 finally moves the leg portion Tb.
Clinch.

At this time, the leg portion Tb adjacent to the sheet bundle Q
Are held by the recesses 157 and 157 of the holding members 153 and 153 and the recesses 167 and 167 of the holding members 163 and 163, the driver unit 11 and the clincher unit 100 are slightly displaced from each other in the front-rear direction (P2 direction in FIG. 1). However, it is possible to prevent the staple Ta from falling down in the front-rear direction.

When the sheet bundle Q is thick, the leg portion Tb of the staple Ta penetrating from the sheet bundle Q becomes short, but the clinch plate 138 causes the clincher guide 18 to move.
Since the clincher guide 180 is rotated in the direction of the arrow shown in FIG. 38 by abutting on the protruding portion 184 of 0, the short leg portion Tb can be clinched by the clincher guide 180.

When the drive cam 301 rotates to the position shown in FIG. 41, the drive cam 301 moves the shaft 1 of the clincher member 130.
The clincher member 130, which is brought into contact with the roller 139R provided at 39 and moved in the forward direction, is returned to the home position and the clincher body 120 is returned to the home position.

When the clincher body 120 returns to the home position, the guide portions 19 of the reset guides 190, 190.
1, 191 are contact portions 159 of the holding members 153, 153,
159 and abutting portion 16 of holding members 163, 163
9 and 169, the holding members 153 and 153 and the holding member 16 resist the urging force of the springs S2 and S2.
When 3 and 163 are opened, the guide portion 181 of the clincher guide 180 enters between the holding portions 156 and 156 of the holding members 153 and 153 by the biasing force of the spring S3, and the state shown in FIG. 21 is obtained. The same applies to the holding members 163 and 163.

When the clincher body 120 returns to the home position, the photo sensor H2 causes the notch 3 of the rotary plate 350 to move.
51 is detected and the drive of the drive motor 307 is stopped.

By the way, in the above embodiment, since the driver 24 and the forming plates 22 and 22 are moved to the top dead center by the two cams 18B and 18C, the operation of operating the driver 24 after the operation of the forming plates 22 and 22 is performed. The cam diameter can be reduced as compared with the case where the control is performed by one cam. In addition, the driver 24
Since the two cams 18A and 18D are used to return the forming plates 22 and 22 to their home positions, the cam diameter can be made smaller than that of a method in which a groove cam or the like is commonly used. It will be simple. Further, since the driver 24 and the forming plates 22 and 22 are not returned to the home position by utilizing the biasing force of the spring, a small power is required for the ejection and forming of the staple Ta.

Further, in the above-described embodiment, when the driver 24 reaches the top dead center, that is, after the staple Ta is ejected by the driver 24, the drive motor 307 is re-driven to perform the clinching by the clincher member 130. Therefore, the timing of clinch can be surely taken.

In the above embodiment, the driver unit 11
Electric stay with separated clincher unit 100
Although the plastic has been described, the electric stay in which the driver unit 11 and the clincher unit 100 are integrated
It may be plastic .

[0084]

As described above, according to the present invention, staples can be reliably clinched even if the driver unit and the clincher unit are displaced in the front-rear direction.

[Brief description of drawings]

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

FIG. 2 is a perspective view showing a driver unit.

FIG. 3 is a cross-sectional view showing a configuration of a driver unit.

FIG. 4 is an enlarged sectional view of a driver unit.

FIG. 5A is a plan view showing a driver and a driver holder. (B) It is sectional drawing which showed the driver and the driver holder.

FIG. 6 is an explanatory diagram showing a configuration for moving a driver and a driver holder up and down.

FIG. 7 is a perspective view showing each cam, a driver holder, and the like.

FIG. 8A is an explanatory diagram showing a state where the driver is at the top dead center by the cam. (B) is an explanatory view showing a state where the driver is at the top dead center by the cam and seen from the back of (A). (C) It is explanatory drawing which showed the state in which the forming plate is in the top dead center by the cam. (D) is an explanatory view showing the state where the forming plate is at the top dead center by the cam and seen from the back of (C).

FIG. 9 is a perspective view showing a configuration of an anvil.

FIG. 10 is an explanatory diagram showing a relationship between an anvil and a driver.

FIG. 11 is a perspective view showing a clincher unit.

FIG. 12 is a perspective view in which a part of the clincher unit is broken away.

FIG. 13 is a sectional view showing a configuration of a clincher unit.

FIG. 14 is an explanatory diagram showing a configuration of a clincher unit.

FIG. 15 is a plan view showing a base plate.

FIG. 16 (A) is a plan view showing a frame. (B) It is sectional drawing which showed the frame.

FIG. 17 is a plan view showing a substrate.

FIG. 18 is a perspective view showing a configuration of a clincher member.

FIG. 19 is a plan view showing a holding plate.

FIG. 20 (A) is a perspective view showing a configuration of a holding mechanism. (B) It is explanatory drawing which showed the holding mechanism when a clincher body advances. FIG. 6C is an explanatory view showing a state where the holding mechanism holds the ejected staples.

FIG. 21A is an explanatory diagram showing a state of the holding mechanism when the clincher body is located at the home position. (B) It is a side view of the above (A).

FIG. 22 is an explanatory view showing a holding member.

FIG. 23 is an explanatory diagram showing a configuration of a holding mechanism.

FIG. 24 is an explanatory diagram showing a configuration of a clincher guide.

FIG. 25 is a cross-sectional view showing a positional relationship between a stopper and a drive cam.

FIG. 26 is an explanatory diagram showing a state in which the clincher member descends and comes into contact with the sheet bundle.

FIG. 27 is an explanatory diagram showing a state where the feed lever is rotated and the slider is retracted.

FIG. 28 (A) is an explanatory diagram showing a state where the driver has moved to the bottom dead center by the cam. (B) is an explanatory view showing a state in which the driver has been moved to the bottom dead center by the cam and seen from the back of (A). (C) It is explanatory drawing which showed the state in which the forming plate is in the bottom dead center by the cam. (D) is an explanatory view showing a state where the forming plate has been moved to the bottom dead center by the cam and is seen from the back of (C).

FIG. 29 (A) is an explanatory diagram showing a state in which the driver and the forming plate have been moved to the bottom dead center. (B) It is a side view of the above (A).

FIG. 30 (A) is an explanatory diagram showing a state where the driver has moved to the bottom dead center by the cam. (B) is an explanatory view showing a state where the driver has moved to the bottom dead center by the cam and is seen from the back of (A). (C) It is explanatory drawing which showed the state in which the forming plate was moved to the top dead center by the cam. (D) is an explanatory view showing the state where the forming plate is moved to the top dead center by the cam and is seen from the back of (C).

FIG. 31 is an explanatory diagram showing a state in which staples are formed in a U-shape.

FIG. 32 (A) is an explanatory diagram showing a state in which the clincher body is in contact with the sheet bundle. (B) It is a side view of the above (A).

FIG. 33A is an explanatory diagram showing a state where the staple is being ejected by the driver. (B) It is a side view of the above (A).

FIG. 34 (A) is an explanatory view showing a state where staples have been ejected by the driver. (B) It is a side view of the above (A).

FIG. 35 (A) is an explanatory diagram showing a state in which the leading ends of the leg portions of the staple rotate the clincher guide. (B) It is a side view of the above (A).

FIG. 36 (A) is an explanatory view showing a state in which the leading end portions of the leg portions of the staple are guided by the clincher member. (B) It is a side view of the above (A).

FIG. 37 is a perspective view of the holding mechanism showing a state where the legs of the staple are bent.

FIG. 38 (A) is an explanatory diagram showing a state in which the leg portions of the staple are bent. (B) It is a side view of the above (A).

FIG. 39 (A) is an explanatory diagram showing a state in which the leg portions of the staple have been clinched. (B) It is a side view of the above (A).

FIG. 40 is a perspective view showing a state in which the legs of the staple are clinched.

FIG. 41 is an explanatory diagram showing a state when the clincher body returns to the home position.

FIG. 42 is an explanatory diagram showing a state in which the leg portions of the staple are held by the holding mechanism.

[Explanation of symbols]

100 clincher units 138 Clinch Board 150 Holding mechanism (holding means)

Claims (2)

(57) [Claims] 1. A staple legs penetrating the driver unit having a <br/> driver hammer out the staple formed into the forming plate and the U-shaped to form the staples into a U-shape, a punched is in sheet bundle electric scan that includes a clincher unit having a clincher for clinching the parts
In the taper , a holding means for sandwiching and holding the leg portion of the staple penetrating the sheet bundle is provided, and after the leg portion of the staple is sandwiched and held by the holding means, the stapler is held by the clincher. An electric stapler characterized by clinching the legs of staples. 2. The electric stapler according to claim 1, wherein the holding means is provided in a clincher unit.