JP2550889Y2 - Staple cartridge mounting mechanism for electric stapler - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric stapler in which a staple cartridge containing staples is attached to and detached from a magazine, and to a mounting mechanism for mounting the staple cartridge without impairing the rigidity of the magazine.

[0002]

2. Description of the Related Art Conventionally, in this type of electric stapler, sheet staples formed by bonding and connecting straight staples in a sheet form are housed in a staple cartridge, and the magazine is fed by a feed mechanism provided in the magazine. , And is punched out after being formed into a U-shape in order from the front end.

The magazine of the electric stapler of the above-mentioned type has a series of side walls on both sides, and a staple cartridge mounting portion is provided inside the side walls, and the staple cartridge is usually housed and arranged in the side walls. It is.

[0004] However, the above-mentioned electric stapler is used independently and is also incorporated into a copying machine or the like, and it is desirable that this type of electric stapler be as small as possible.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances. In particular, it is possible to reduce the size of the entire magazine by cutting out a part of the magazine and using the part as a part of a mounting portion of a staple cartridge. It is an object of the present invention to provide a staple cartridge mounting mechanism that mounts a staple cartridge without damaging the rigidity of the magazine.

[0006]

In order to achieve the above object, a mechanism for mounting a staple cartridge in an electric stapler according to the present invention is provided with a magazine rotatable in a vertical direction on a base frame having a spelling table. When the magazine is rotated downward by the electric motor, the staples in the magazine are driven toward the spelling table by a driver plate that moves up and down relatively to the magazine, and the staples are made to penetrate the stencil material on the spelling table. In the electric stapler for stapling, the magazine is formed with a cutout portion that opens upward in the center of the left and right side walls, and a mounting portion for a staple cartridge is formed inside the cutout portion. The staple cartridge mounted in the section is fitted in the notch.

[0007]

According to the above construction, when the magazine is rotated in the vertical direction, the magazine is stopped particularly during the upward operation from below, and the driver plate is further moved upward relative to the magazine. Operate. However, when staples are stuck in the magazine due to spelling failure, the driver plate may not be able to operate in the magazine and may be integrated with the magazine. For this reason, the magazine is forcibly further raised together with the driver plate, so that a large bending load acts on the magazine, and stress concentrates particularly on the notch in the side wall of the magazine. However, the staple cartridge fits into the notch in the side wall of the magazine, and the magazine is integrated, so that the staple cartridge bears part of the load for bending the magazine. For this reason, the rigidity of the magazine is not impaired, and even if an excessive force is applied to the magazine, the magazine is prevented from bending or being damaged.

Further, since a part of the magazine is cut out and used as a part of the mounting portion of the staple cartridge, the whole can be reduced in size.

[0009]

FIG. 1 shows an electric stapler. This electric stapler uses sheet staples in which straight staples are adhesively connected in a sheet shape, and the magazine 2 on the base frame 1 is vertically rotated by a drive link 3 operatively connected to an electric motor. The sheet-like staples are sent out from the staple cartridge 4 mounted on the magazine 2 forward, and the sheet-like staples are formed into a U-shape in order from the leading staple, and then are punched out toward the spelling table 5 at the front end of the base frame 1 to form staple legs. The part is spelled by penetrating the material to be sewn 6 on the spelling table 5.

As shown in FIG. 2, the staple cartridge 4 comprises a cartridge main body 4a for accommodating the sheet-like staples S in multiple stages and a cap 4b thereon. On the front wall 6 of the cartridge body 4a, there are formed projecting guides 7 for the sheet-like staples S which are led out from the opening at the lower end, and engaging projections 8 are formed on the left and right sides of the front and rear walls. At the lower ends of both side walls, protruding edges 9 are formed to support the lower surfaces of both side edges of the lowermost sheet-like staple S. Except for this, the bottom is open. An engaging piece 10 is formed at a corner of the cap 4b, and is engaged with the opening 11 of the front and rear walls of the cartridge body 4a. A push plate 12 and a spring 13 are arranged between the cap 4b and the sheet-like staple S, whereby the sheet-like staple S is urged downward.

At the center of the magazine 2, a staple cartridge mounting portion 14 is provided.
A feeding device (not shown) for supplying the sheet-like staples S in the staple cartridge 4 to the forming / ejecting portion 15 is provided below the embossing portion 15 and below the mounting portion 14. The width of the magazine 2 is formed to the same size as the left and right width of the staple cartridge 4. Side walls 16 are formed on both left and right sides of the magazine 2 so as to rise.
At the center of the left and right side walls 16 corresponding to the staple cartridge mounting portion 14, a U-shaped notch 17 opening upward is provided.
Are formed. An engaging portion 18 corresponding to the engaging protrusion 8 of the staple cartridge 4 is formed before and after the upper open end of each notch portion 17.

When the staple cartridge 4 is mounted on the mounting portion 14 of the magazine 2, the staple cartridge 4 is fitted into the notch 17 of the main body of the magazine 2 as shown in FIG. 8 may be engaged with the engaging portion 18 of the notch.

The forming / ejecting portion 15 includes a forming plate (not shown) for forming the foremost staple of the sheet-like staple S into a U-shape, and a driver plate 19 for emitting the formed staple (see FIG. 4). Are provided, and a face plate 20 is disposed at a front portion thereof.

A rear portion of the magazine 2 and a rear portion of a pair of drive links 3 arranged on both sides thereof are rotatably supported on the base frame 1 by the same support shaft 21. The drive link 3 is configured to be driven to rotate vertically by an appropriate drive mechanism a. As such a driving mechanism, a mechanism using a grooved cam, a mechanism using a cam roller, or the like may be employed.

The front ends of the two drive links 3 are connected by a connecting shaft 22. The connecting shaft 22 is connected to a projecting piece 23 (see FIG. 2) on the front surface of a driver plate 19 disposed at the front of the magazine 2. Penetrates. The position where the lower surface of the front end of the magazine 2 contacts the spelling table 5 of the base frame 1 and the protrusions 24 formed laterally from the lower end of the magazine 2.
Is the rotation range of the magazine 2 up to the position at which is engaged with the curved arm 25 formed on the base frame 1. The driver plate 19 is configured to move up and down relatively to the magazine 2, so that the drive link 3 is
Is set to be larger than the stroke.

With the above configuration, when the drive link 3 is driven in the up-down direction, the driver plate 19 also moves up and down, and the magazine 2 follows the movement due to frictional resistance with the surroundings, so that the magazine 2 also turns up and down. I do. The magazine 2 also moves downward with the downward movement of the driver plate 19, but the lower surface of the front end of the magazine 2 comes into contact with the upper surface of the sewn material 6 and stops. In contrast, the drive link 3 and the driver plate 19
Continues to move downward, and as shown in FIG.
Reference numeral 9 denotes a staple S1 (formed) at the front end supplied to the rear surface of the face plate 20 which is punched out from the lower surface of the front end of the magazine 2 toward the spelling table 5, and the leg of the staple S1 is used to sew the material 6 on the spelling table 5. Spell it through. Further, the forming plate is driven together with the driver plate 19, and the staples at the front of the sheet-like staple S are pressed down on both sides by the forming plate to be formed into a U-shape. When the driver plate 19 is driven upward, the formed staples are supplied to the back surface of the face plate 20 by the feeding device. By repeating the above, the forming and driving of the sheet staple S are performed.

By the way, when the magazine 2 rotates in the vertical direction, the projection 24 formed on the magazine 2 engages with the curved arm 25 formed on the base frame 1 especially during the upward operation from below. The magazine 2 cannot rotate upward any more, while the drive link 3 and the driver plate 19 operate further upward. However, when staples are jammed inside the magazine 2 due to a misspelling, the driver plate 19 cannot operate in the magazine 2 and may be integrated with the magazine 2. For this reason, the drive link 3 forcibly raises the magazine 2 together with the driver plate 19, so that a large bending load acts on the magazine 2. In particular, stress concentrates on the notch 17 in the side wall 16 of the magazine 2. However, the staple cartridge 4 is fitted into the notch 17 and the magazine 2 is integrated, and the staple cartridge 4 bears a part of the load for bending the magazine 2. Therefore, the rigidity of the magazine 2 is not impaired, and even if an excessive force is applied to the magazine 2, the magazine 2 is prevented from being bent or damaged.

[Brief description of the drawings]

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

FIG. 2 is a perspective view of a magazine and a staple cartridge.

FIG. 3 is a side view of a main part of the electric stapler.

FIG. 4 is an explanatory view of an operation mode of the electric stapler.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 base frame 2 magazine 4 staple cartridge 5 binding table 6 material to be bound 14 mounting portion 16 side wall 17 notch portion 19 driver plate

Claims (1)

(57) [Scope of request for utility model registration] 1. A magazine is provided on a base frame having a spelling table so as to be rotatable in a vertical direction, and when the magazine is rotated downward by an electric motor, staples in the magazine are relatively moved with respect to the magazine. In an electric stapler, which punches a staple through a material to be sewn on a spelling table by a driver plate that moves up and down, and spells the staple, the magazine has a cutout opening upward at the center of the left and right side walls. And a staple cartridge mounting portion is formed in the interior including the notch portion, and the staple cartridge mounted in the mounting portion is fitted in the notch portion. Staple cartridge mounting mechanism.