JPS6334853Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of application of the invention) This invention relates to a binding device in a stapler with a movable clincher.

(Prior art and its problems) In general, a stapler uses a driving member to drive a staple having a U-shaped crown and legs into the material to be stapled, and then bend the legs inward or outward. The stapler is used to staple materials, and the legs of the staple are bent by pressing the legs of the staple against a clincher provided at the lower part of the driving member. The tip of the leg of the staple needle that has passed through the material to be stapled is guided by the guide surface of the clincher and bent in a predetermined direction.

There are fixed types and movable types of clinchers. A fixed clincher is used in ordinary hand-held staplers, etc., and as shown in FIG.
1 bends the tip of the leg Sa, so when the number of sheets of the staple material 40 is small and thin, the bent leg Sa of the staple S0 bends into a substantially arc shape, and the tip further bends. Return to binding material 4
0 may appear on the surface, and it looks bad,
Removing the staple S0 is also troublesome and may injure hands and fingers. On the other hand, the movable clincher, as shown in FIG. clincher holder 20.
The legs Sa protrude downward from the material to be bound 40 by rotating the clinchers 21, 21 which are rotatably held in the
is pressed from the side along the lower surface of the material to be bound 40 and bent inwardly or outwardly into a substantially L-shape, and regardless of the thickness of the material to be bound 40, stable and good binding can always be obtained. On the other hand, movable clinchers have a complicated operating mechanism, so they have not been used in anything other than relatively large staplers.

However, recently, electric staplers driven by motors have been proposed and implemented, and it is desired that these staplers also employ movable clinchers.

(Technical issues of the invention) This invention was created in view of the above circumstances.
It is an object of the present invention to propose a binding device for a stapler which can operate a movable clincher with a particularly simple construction.

(Structure of the invention) In order to achieve the above-mentioned problems, this invention includes a clincher holder provided on the main body of the stapler so as to be movable up and down, and a clincher holder held in the clincher holder so as to rotate when the main body moves downward. A pair of clinchers,
A drive device for a driving member that drives staples into materials to be stapled, a cam interlocked with the drive device, and an actuation member movable between a position where the clincher holder is supported upwardly and a position where this support is released. have,
The cam is moved to a position where it engages with the operating member and releases support from the clincher holder when the driving member driven by the drive device moves downward and the staple has finished penetrating the material to be stapled. It is characterized by

(Operations and effects of the invention) As described above, according to this invention, by driving the driving device of the driving member, the driving member moves downward and the staple penetrates the material to be bound, and at the same time, the cam is interlocked. . Then, when the staple has completed penetrating the material to be stapled, the cam engages with the actuating member and moves to a position where the support of the clincher holder is released, so that the clincher holder moves downward. At this time, the clincher rotates and bends the staple leg portion penetrating below the material to be bound, thereby making it possible to always obtain good binding regardless of the thickness of the material to be bound.

Furthermore, the movable clincher can be operated by a simple operating mechanism consisting of a cam that is linked to a driving device for the driving member and an actuating member that is linked to the cam and the movable clincher, making the entire stapler compact. In addition, it can be used in electric staplers, which have a complicated diagonal mechanism and require a simple operating mechanism for the movable clincher.

(Example) Hereinafter, an example of this invention will be described with reference to the drawings, in which an electric stapler is provided with a binding device.
First, an overview of the operation of the electric stapler will be explained, and then the binding device will be explained.

First, in FIG. 1a, the symbol A indicates an electric stapler. This electric stapler A stores, in a cartridge 2 provided at the base of a magazine 1, sheet staples (hereinafter simply referred to as sheet staples) S, which are made by bonding a large number of unformed staples in a series in a sheet shape, stacked in multiple stages. Then, the lowermost sheet staples S are sequentially fed out from the supply port 2a formed at the lowermost part of the front wall of the cartridge 2 toward the forming/driving section a, where they are first held in the holder 9. The forming member 3 and the driving member 4 move up and down, and the sheet staples S are formed in order from the first unformed staple S1, and then driven into the material 5 to be bound, and the sheet staples S are driven into the forming and driving part a. The feeding is performed by a feeding device, and the forming and driving are performed by a link device.

The cartridge 2 is replaceably provided at the base of the magazine 1, and as shown in FIG.
It is open except for b.

The sheet staple feeding device consists of a magnet 6 provided below the cartridge exchange section at the base of the magazine 1 and an endless belt 8 stretched between pulleys 7, 7.
It is composed of: When the cartridge 2 is set on the cartridge exchange section, the bottom surface of the bottom sheet staple S is on the endless belt 8.
At this time, the sheet staple S, which is a magnetic material, comes into strong contact with the upper surface of the feeding belt 8 due to the magnetic attraction force of the magnet 6, and when the endless belt 8 is moved, the frictional force causes the sheet staple S to close to the feeding port 2a.
From there, it is sent out toward the forming and driving part a.

The forming member 3 and the driving member 4 are held in a holder 9, which is connected to one end 11a of a drive link 11 via a spring 10. The center portion 11b of the drive link 11 is rotatably attached to the side wall of the stapler main body A1, and the other end portion 11c has an annular shape formed on the inner surface of the disc-shaped cam 12, as shown in FIG. It is slidably engaged with the groove 12a.

The feed device and the link device are linked to a drive device. That is, one of the pulleys 7 in the feeding device and the cam 12 in the link device are fixed to the same drive shaft 14 pivotally attached to the side of the stapler main body A1, and the drive shaft 14 is connected to the drive shaft 14 via a reduction gear (not shown). and is connected to the output shaft of the electric motor 15.

Therefore, by driving the electric motor 15 of this drive device, the drive shaft 14 rotates, and at the same time, the pulleys 7, 7 and the cam 12 also rotate. The endless belt 8 is moved by the rotation of the pulleys 7, 7, and the sheet staples S in the cartridge 2 are transferred to the forming and driving section a. Further, the cam 12 also rotates at the same time as the drive shaft 14 rotates, and the engagement end 11c of the drive link 11 moves up and down, so the molding member 3 and the driving member 4 held by the holder 9 at the other end 11a move up and down. As shown in FIG.
1 is driven into the bound material 5 by the driving member 4. After that, the sheet staples S transferred to the forming and driving section a are formed in order from the first unformed staple, and then driven into the material to be bound 5.

Next, the binding device includes a drive device for the above-mentioned driving member 4, a cam 12 interlocked with the drive device, a clincher holder 20 provided on the stapler main body A1 so as to be movable up and down, and a clincher holder 20 that rotates when the stapler body A1 moves downward. The clincher holder 20 includes a pair of clinchers 21, 21 held by the clincher holder 20, and an actuating member 22 that is movable between a position where the clincher holder 20 is supported upward and a position where this support is released. There is.

The structure of the movable clincher is the same as the conventional one shown in FIG. 5b. Clincher holder 2
0 is formed with an engagement groove 23, and the tip of a leaf spring 25 fixed to the back surface of the binding base 24 of the stapler A is engaged with the engagement groove 23, thereby constantly urging the clincher holder 20 upward. are doing. When the clincher holder 20 moves downward against the force of the leaf spring 25, the tips of the clinchers 21, 21 held by the holder 20 are moved relative to each other by the upper surface of the fixing member 26 provided at the lower part of the clinchers 21, 21. It is pushed up and rotated.

The actuating member 22 is interposed between the cam 12 and the clincher holder 20, and has a support piece 22a at one end.
However, an engagement piece 22b is formed at the other end, and the support piece 22a at one end always holds the lower end of the clincher holder 20 by a tension spring 29 attached to an engagement protrusion 28 provided on the stapler main body A1. It is biased into a supporting position.

An engaging protrusion 30 that can be engaged with the engaging piece 22b of the operating member 22 is formed at the outer end of the cam 12. The engaging protrusion 30 is set so as to engage with the actuating member 22 when the driving member 4 driven by the driving device moves downward and the staple S finishes penetrating the material 5 to be stapled.

Next, the operation mode of the above-mentioned spelling device will be explained.

First, place the material 5 to be stapled on the binding table 24 of stapler A.
By loading the cartridge and driving the drive device (Fig. 2), the electric motor 15 rotates, the drive shaft 14 rotates, and the feed device and link device are operated, and the sheet staples S in the cartridge 2 are formed and driven. At the same time, the drive link 11 swings to move the forming member 3 and the driving member 4 downward, and the spring 10 is extended and the driving member 4 drives the formed staple S1 into the material to be bound 5 (the first step). Figure 3).

Then, when the leg portion Sa of the molded staple S1 finishes penetrating the stapled material 5, the cam 12 engages with the actuating member 22 and moves the actuating member 22 against the spring force of the tension spring 29. (FIG. 4), the support of the actuating member 22 by the support piece 22a is released, and the clincher holder 20 moves downward. At this time, as shown in FIG. 5b, the clincher 21, 2
1 rotates, and its guide surface pushes from the side the tip of the leg Sa of the staple S1 that has penetrated below the material 5 to be stapled, bending it and bringing it into pressure contact with the back surface of the material 5 to be stapled. As a result, good binding can always be obtained regardless of the thickness of the material 5 to be bound.

When the cam 12 rotates further and its engagement protrusion 30 disengages from the engagement portion 22b of the actuation member 22, the actuation member 22 returns to its original position by the force of the tension spring 29. At this time, since the magazine 1 is also moving upward, the clincher holder 20 is urged by the leaf spring 25 and moves upward, and the support piece 22a of the operating member 22 enters the lower part of the clincher holder 20. , and returns to the initial state (the state shown in Figure 2).

[Brief explanation of the drawing]

Figs. 1 a, b, c, d, and e are explanatory diagrams of an outline of an electric stapler and its constituent members, and Figs. 2, 3, and 4 are explanatory diagrams of the operation mode of the binding device in the stapler according to this invention. FIGS. 5a and 5b are explanatory diagrams of the movable clincher. Code A...Electric stapler, S...Staple,
1... Magazine, 2... Cartridge, 5... Material to be bound, 8... Endless belt, 12... Cam, 14
...Drive shaft, 20...Clincher holder, 21...
... Clincher, 22 ... Actuation member, 29 ... Tension spring, 30 ... Engagement protrusion.

Claims (1)

[Scope of utility model registration request] A clincher holder provided on the stapler body so as to be movable up and down, a pair of clinchers held in the clincher holder so as to rotate when the clincher holder moves downward, and driving of a driving member that drives the staple into the material to be bound. a cam interlocked with the drive device;
The cam has an actuating member that is movable between a position where the clincher holder is supported upward and a position where this support is released, and the cam is configured to move the driving member driven by the drive device downward so that the staples are bound. What is claimed is: 1. A binding device for a stapler, characterized in that, when the material has been penetrated, the device engages with an actuating member to move the clincher holder to a position where support is released.