JP2556453Y2 - Staple feeder for electric stapler - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to a cartridge in which sheet-like staples are stacked and housed in a detachable manner on a magazine portion, and utilizes the movement of the magazine portion and the clincher portion at the time of driving so that the cartridge in the cartridge can be detached. The present invention relates to a staple feeding device in an electric stapler for feeding a lowermost sheet staple forward.

[0002]

2. Description of the Related Art A cartridge containing a stack of sheet staples formed by bonding unformed staples in the form of a sheet is detachably provided on a magazine portion, and the lowermost sheet in the cartridge is driven at the time of driving. As a staple feeding mechanism for feeding staples forward, those disclosed in Japanese Utility Model Laid-Open No. 1-156880 and JP-A-4-129679 are known.

In the former, a feed belt is disposed below a cartridge, the feed belt is brought into contact with the lowermost sheet staple, and the feed belt is moved to feed the sheet staple.
In the latter, sheet-like staples are sent out by rotation of feed rollers instead of feed belts.

However, in any of the feed mechanisms, the feed force depends on the contact friction between the feed means and the lowermost sheet staple, so that the feed of the sheet staple tends to be unstable. In particular, since the lowermost sheet staple in the cartridge is in contact with the upper sheet staple with a high frictional force, the initial feeding is insufficient.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a staple feeding device in an electric stapler capable of solving the above-mentioned drawbacks and, in particular, ensuring the initial feeding of the lowermost sheet staple in a cartridge. .

[0006]

In order to achieve the above object, a staple feeding device in an electric stapler according to the present invention is a cartridge in which sheet-shaped staples formed by bonding unformed staples in a sheet shape are stacked and stored. Is detachably provided on the magazine portion, and at the time of driving, the magazine portion is moved relatively close to and away from the clincher portion, and the lowermost sheet-like staple in the cartridge is sent forward and the foremost portion sent out is In the electric stapler, which forms an unformed staple and discharges the staple toward the clincher portion, the magazine portion includes a plate-shaped pusher member facing the rear end surface of the lowermost sheet staple in the cartridge, and a surface of the pusher member. A roller for pressing and moving the pusher member back and forth, and rotating the roller With arranging the drive gear,
A rack member that meshes with the gear and that rotates the drive gear when the magazine approaches or separates from the clincher during staple driving is disposed at a rear portion of the magazine.

[0007]

According to the above construction, when the magazine section is separated from the clincher section after staple ejection, the drive gear meshing with the rack section of the rack member also rotates, so that the roller is also driven to rotate. When the roller rotates, the pusher member pressed against the roller is moved forward, so that the front end engages the rear end surface of the lowermost sheet staple of the cartridge, and the sheet staple is moved forward along the staple guide. To send out.

At the time of the spelling operation, the magazine portion approaches the clincher portion, and the gear meshing with the rack member rotates in the reverse direction, so that the pusher member is moved backward.

As described above, according to the present invention, since the rear end surface of the lowermost sheet staple in the cartridge is pushed out by the pusher member, the sheet staple can be reliably sent out. Moreover, the amount of movement of the pusher member is obtained by the rotation of the rack member and the drive gear, and the amount of rotation of the drive gear can be adjusted by the meshing ratio between the rack and the drive gear, so that a sufficient feed amount can be obtained. . Accordingly, the initial feeding of the lowermost sheet staple can be reliably performed.

[0010]

FIG. 1 shows an electric stapler, which comprises a magazine 1 provided with a punching device for punching staples in a staple storage section and a frame 2 attached thereto.
(Supporting means) so as to be slidable up and down, and a punching device 3 at the front end of the magazine 1 below the magazine 1.
And a clincher portion 4 for bending a leg portion of the staple punched out of the staple.

An electric motor 5 and a reduction gear 6 linked to the electric motor 5 are arranged on the frame 2. An intermediate portion of a drive link 7 is rotatably supported on both left and right side walls of the frame 2, and a rear end of the drive link 7 is engaged with a cam 8 integrally formed with a final control gear 6 a of the reduction gear 6. The front end is linked to a punching device 3 provided at the front end of the magazine section 1. A support shaft 9 is provided at an intermediate portion of the drive link 7, and the support shaft 9 is supported by an elongated hole formed vertically long in the frame 2.

The magazine section 1 includes a staple storage section and a punching device 3 in a box-shaped magazine section main body 1a. Removable cartridge 1 for staple storage
3. The staples are formed by bonding straight unformed staples and bonding them together to form a sheet.
These sheet-like staples a are stacked and stored in the cartridge 13. The lowermost sheet staple a1 is supported by the staple guide 10, and is sequentially sent to the front end ejection device 3 side by a staple supply mechanism described later.
The punching device 3 is disposed on the magazine body 1a and forms a staple in a U-shape.
2 and a driver plate 11 for punching out the formed staples a, a holder 16 is made to pass through a slit formed in a front wall of the magazine portion main body 1a and protrude forward. The drive link 7 is configured by connecting the front ends 7a thereof. When the connecting shaft 17 moves, the driver plate 11 and the forming plate 12
It operates along the inner surface of the front wall of the magazine body 1a.

The cartridge 13 for storing the staples and the mechanism from the feeding of the staples in the cartridge 13 to the formation and ejection of the staples are the same as the mechanisms provided in the known electric stapler, and the description thereof will be omitted.

Next, as shown in detail in FIG. 3, a sliding projection 18 is formed on the outside of the magazine portion main body 1a, and the sliding projection 18 is formed on the vertically elongated guide groove 1 formed on the frame 2.
By being engaged with the frame 9, it is supported to be vertically movable with respect to the frame 2 within the movable range of the sliding projection 18. Therefore, at the time of driving, the magazine portion main body 1a relatively moves toward and away from the clincher portion 4. A feeder 21 is provided for feeding the lowermost sheet staple a1 in the cartridge 13 from the outlet 20 in the front wall of the cartridge 13 by utilizing this approaching / separating operation.

The feeder 21 has a plate-like pusher member 22 facing the rear end surface of the lowermost sheet-like staple a1 in the cartridge 13, and a push-contact member 22 for pressing the surface of the pusher member 22 to advance and retreat the pusher member 22. And a drive gear 24 for rotating the roller 23.

That is, the cartridge 1 of the magazine unit 1
A support surface 25 extending rearward from the staple guide 10 that guides and supports the lower surface of the lowermost sheet-like staple a1 is formed behind the lowermost staple 3, and the pusher member 22 is disposed above the support surface 25. As shown in FIG. 4, a sliding groove 26 is formed at the center of the pusher member 22, and a sliding protrusion 27 formed on the support surface 25 is engaged in the sliding groove 26. The pusher member 22 is disposed slidably on the support surface 25 in the front-rear direction. A front portion 22a of the pusher member 22 is formed in a wedge shape, and a front end portion thereof is formed to be equal to or smaller than a thickness of the sheet staple a, and faces the rear end surface of the lowermost sheet staple a1 in the cartridge 13. It has been like that. Further, a stopper 28 for stopping the backward movement of the pusher member 22 is formed at a rear portion of the support surface 25.

The roller 23 presses against the surface of the pusher member 22 to move the pusher member 22 forward and backward.
As shown in FIG. 5, the driving gear 2 comprises a rubber roller.
The rotary shaft 30 is formed on the same rotary shaft 30 as the rotary shaft 4, and the rotary shaft 30 is supported on both side walls 1 a ′ of the magazine portion main body 1 a. The peripheral surface of the roller 23 is pressed against the surface of the pusher member 22. In addition, a rack member 29 that meshes with the drive gear 24 is disposed at the rear of the magazine section 1 as shown in FIG. The rack member 29 is formed integrally with a bush 32 that supports the support shaft 31 of the cam 8. One end is engaged with the frame 2 so as not to move, and the other end is formed with a rack 29 a that meshes with the drive gear 24. Have been.

Further, a supply roller 33 is disposed in the vicinity of the staple discharge port 20 of the cartridge 13 mounted on the magazine section 1, and the supply roller 33 is configured to be driven to rotate by driving means (not shown). . This constitutes a secondary feed mechanism for feeding the sheet-like staple a1 initially fed from the cartridge 13 by the feeder 21 to the driving portion 3 further forward.

Next, the clincher unit 4 is provided with a movable clincher 37 on a binding table 36 on which the leading edge of the binding paper 35 is placed. The movable clincher 37 is a driving mechanism when the staples pass through the binding paper 35. It is configured to be driven by Note that the clincher is not limited to the movable clincher. A fixed clincher may be used.

According to the above-described configuration, after the spelling paper 35 is inserted between the driving section 3 and the clincher section 4, the electric motor 5 of the magazine member is operated to thereby reduce the speed of the reduction gear 6.
With the rotation of the cam 8, the rear end of the drive link 7 is pushed up by the cam 8 and swings around the support shaft 9,
Since the front part of the drive link 7 operates downward, the connecting shaft 17
Is also driven downward (see FIGS. 2 and 3). For this reason, the driver plate 11 of the driving device is also driven downward. However, since a frictional force acts between the components of the driving device and the magazine portion main body 1a, the magazine portion main body 1a is driven by the spelling paper 35. Moves downward in a direction substantially perpendicular to.

By the way, during the spelling operation as described above,
Since the front end 7a of the drive link 7 swings downward in accordance with the rotation of the cam 8, the magazine 1 also moves down and moves close to the clincher 4. Therefore, the gear 24 meshed with the rack 29a of the rack member 29 also rotates in the direction of the arrow in FIG. 6A, so that the roller 23 is also driven to rotate in the same direction. When the roller 23 rotates, the pusher member 22 pressed against the roller 23 is moved rearward, so that the rear end engages with the stopper 28 and stops.

After the spelling operation, the front end 7a of the drive link 7 swings upward in response to the rotation of the cam 8, so that the magazine portion 1 also moves upward, separates from the clincher portion 4, and moves to the rack member 29. Since the meshed drive gear 24 rotates in the direction of the arrow in FIG. 2B, the pusher member 22 is moved forward, and the front end thereof is engaged with the rear end surface of the lowermost sheet staple a1 of the cartridge 13, The sheet staple a1 is sent forward along the staple guide 10.
As a result, the front portion of the sheet staple a is sent to the supply roller 33, and is further supplied to the driving portion 3 by the supply roller 33. And is driven downward by the driver plate 11.
After the leg portions of the formed staples punched out by the driver plate 11 penetrate the spelling sheet 35, they are bent by the movable clincher 37 of the clincher unit 4 to complete the spelling. After the spelling operation, the magazine unit 1 moves down again and the pusher member 22 moves rearward, and when the lowermost sheet staple a1 is sent out from the cartridge 13, the next sheet staple a descends.

According to the staple feeding device 21 using the pusher member 22, the rear end surface of the lowermost sheet staple a1 in the cartridge 13 is pushed out by the pusher member 22, so that the sheet staple can be fed reliably. . In addition, the amount of movement of the pusher member 22 is obtained by the rotation of the rack member 29 and the drive gear 24, and the amount of rotation of the drive gear 24 can be adjusted by the meshing ratio with the rack 29a. can get. Therefore, the initial feeding of the lowermost sheet staple a1 can be reliably performed.

It should be noted that the staple feeding device 21 having the above-described configuration is used.
Is applied to an electric stapler in which the magazine unit 1 and the clincher unit 4 relatively come close to and separate from each other during a staple driving operation, such as an electric stapler configured to rotatably connect the respective bases of the magazine unit 1 and the clincher unit 4. Can be.

[Brief description of the drawings]

FIG. 1 is an overall schematic view of an electric stapler according to the present invention.

FIG. 2 is an explanatory diagram of an operation state of the electric stapler.

FIG. 3 is an explanatory diagram of an operation state of a magazine portion of the electric stapler.

FIG. 4 is a perspective view of the periphery of a pusher member of the electric stapler feeding device.

FIG. 5 is an explanatory view of the feeder as viewed from the rear.

FIGS. 6 (a) and 6 (b) are explanatory views of an operation mode of the feeder.

[Explanation of symbols]

 a Sheet Staple 1 Magazine 4 Clincher 21 Feeder 22 Pusher Member 23 Roller 24 Drive Gear 29 Rack Member

Claims (1)

(57) [Scope of request for utility model registration] 1. A cartridge in which unformed staples are laminated and housed in the form of sheets formed by adhesively connecting unformed staples is detachably provided on a magazine, and the magazine portion is relatively close to the clincher portion at the time of driving. In the electric stapler, which performs the separating operation and sends out the lowermost sheet-like staples in the cartridge to the front, and shapes the sent frontmost unformed staples and punches them out toward the clincher portion, the magazine portion includes a cartridge. A plate-like pusher member facing the rear end surface of the lowermost sheet-like staple in the inside, a roller for pressing against the surface of the pusher member to advance and retreat the pusher member, and a drive gear for rotating the roller. At the rear of the magazine part, mesh with the gear and drive staples Staple feeding apparatus in an electric stapler characterized in that a rack member which rotationally drives the drive gear when the magazine section is close away from the clincher section to.