JPH0718537Y2 - Cartridge for electric stapler - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet staple storage cartridge for use in an electric stapler of the type in which sheet staples are bent and formed into a U-shape.

[Prior art]

A conventional cartridge of this type is an actual flat head 2
As shown in No. 61583 , a projecting portion is provided in the center of the lower surface of the front guide portion of the staple cartridge, and the projecting portion presses the sheet staple toward the endless belt side which is the feeding means. The endless belt is stretched from the staple storage part of the cartridge to the front end of the guide part, and is pressed by the protruding part of the guide part through the sheet staple, so that it is possible to reduce the distance between the sheets for a predetermined length and therefore the both ends. Since it was possible to increase the frictional force over a predetermined length, the deformation load was not concentrated and did not act on the sheet staple, so that the sheet staple was not separated. However,
When the feeding means is a roller, in the structure in which the guide portion of the cartridge is provided so as to face the roller,
The sheet staple is subjected to the load only at the position where the protruding portion of the cartridge of the roller is opposed, and the sheet staple may be cut.

[0003]

SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide a cartridge most suitable for an electric stapler using a roller as a feeding means.

[0004]

In order to achieve the above object, an electric stapler cartridge according to the present invention accommodates sheet staples formed by connecting straight staples in a sheet shape in a stacked state and at the same time An outlet for leading the lowermost sheet staple forward is formed at the lower end of the front wall of the storage unit with the front portion open, and a guide portion for guiding the upper surface of the sheet staple pulled forward is projected from the outlet. The lowermost seat stay is formed on the lower surface of the guide portion and is provided with an electric stapler.
It is characterized in that a recess or an opening is formed at a position facing a feed roller that feeds the pull forward .

[0005]

[Operation and effect of the invention ] The cartridge having the above-mentioned structure is used.
Sheet staples to the electric stapler
Guide means when the cartridge is installed.
Position the feed roller at the position below the recess or opening of
Set up. By rotating this feed roller, the outlet port
The lowermost sheet staple derived from the
Is guided along with the concave part of the guide part or
It is fed forward by a feed roller below the opening.
By the way, the concave portion or the opening portion faces the feed roller.
Since it is formed at the position,
Although frictional force acts on the feed roller,
The upper surface of the sheet staple corresponding to the mouth is below the guide.
Since it does not contact the surface, sliding resistance due to frictional force does not work. Therefore, the feed force by feed Ri roller is not offset by the sliding resistance of the upper surface of the sheet staple. Therefore, the sheet staple can be reliably fed.

Moreover, since a part of the roller abutting portion of the sheet staple is abutted against and supported by the lower surface of the guide portion, it is hard to be deformed even if it is pressed against the front feed roller. Therefore, the sheet staple will not be deformed during feeding and cut and separated.

Therefore, according to the present invention, it is possible to provide the most suitable cartridge for the electric stapler using the feeding roller as the feeding means.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 indicates a cartridge used for an electric stapler. The cartridge 1 is for accommodating sheet staples 2 formed by connecting straight staples in a sheet shape in a stacked state. The cartridge 1 has an accommodating portion 3 for the sheet staples 2 and the front portion of the bottom of the accommodating portion 3 is open. Supporting pieces 4 for supporting both side edges of the lowermost sheet staple 2a are formed at the rear portions on both sides thereof. A leading-out port 5 for leading the lowermost sheet staple 2a forward is formed at the lower end of the front wall 3a of the storage unit 3, and the upper surface of the sheet staple 2 guided forward from the leading-out port 5 is guided. A guide portion 6 is formed to project. An opening 7 is formed in the guide portion 6. The openings 7 are formed on the left and right sides at intervals.
A step portion 8 slightly larger than the thickness of the sheet staple 2 is continuously formed on the lower surfaces of both sides of the guide portion 6 from the lower surface of the open portion of the storage portion 3, and the front end of the guide portion 6 is formed at an acute angle. ing.

Reference numeral 10 denotes a lid member, and a locking convex portion 11 which is locked to the bent upper end of the storage portion 3 is formed at the rear portion of the lid member 10, and a bearing surface 12 is provided on the rear surface of the locking convex portion 11. Are formed. From the front end of the lid member 10, a protrusion 1 on the front wall of the storage unit 3
A locking piece 14 that locks to the No. 3 is formed so as to hang down. Reference numeral 15 is a pressing member, and a coil spring 16 is interposed between the pressing member 15 and the lid member 10 toward the front side. As a result, the sheet staple 2 stored in the storage portion 3 is always pressed downward.

Next, as shown in FIGS. 2 and 3, the cartridge 1 is a magazine 2 provided on an electric stapler.
It is removably attached to 0. At the center of the magazine 20, a mounting portion 21 for the cartridge 1 that stores the sheet staple 2 is provided. The mounting portion 21 is provided with a support ridge 23 that protrudes inward from the lower portion of the side wall 22 of the magazine 20.
And an engaging groove 24 provided between the front end of the support projection 23 and the lower end of the magazine front wall 32, and a holding shaft 25 provided on the upper rear part of the magazine side wall 22. The pressing shaft 25 is slidably installed on the upper surface of the magazine side wall 22 and is biased forward and obliquely downward by a spring 26.

With the above structure, when the cartridge 1 is mounted in the mounting portion 21 of the magazine 20, the front end 6a of the guide portion 6 of the cartridge 1 is fitted into the engaging groove 24 of the magazine 20.
After that, the rear portion of the cartridge 1 is strongly pressed downward to withdraw the pressing shaft 25 against the spring 26 and engage the bearing surface 12 of the cartridge 1. At this time, the lower surface of the cartridge 1 is supported by the supporting protrusions 23 of the side wall 22 of the magazine 20. The cartridge 1 can be easily removed by pulling it up and retracting the pressing shaft 25 against the spring 26.

At the bottom of the magazine 20, there is provided a feeding device for feeding the sheet staples 2 in the cartridge 1 forward from the lowest one. This feeding device is provided with feeding rollers 30 and 31 made of NBR or the like, which are provided in front of and behind the center of the magazine 20, respectively.
And a drive device (not shown) that rotationally drives the feed rollers 30 and 31. The feed rollers 30 and 31 are respectively provided on the left and right sides, and the front feed roller 30 is provided on the cartridge mounting portion 21 at the guide portion 6 of the mounted cartridge 1.
Is arranged at a position corresponding to the opening 7 of the sheet stapler 2 and has a size such that the distance between the guide portion 6 and the front feed roller 30 is smaller than the thickness of one sheet staple 2. The rear feeding roller 31 is arranged at a position facing the bottom open portion of the cartridge 1 and at a position facing the coil spring 16 for pressing the staple. And the rear feed roller 3
1 is set so as to come into pressure contact with the lower surface of the lowermost sheet staple 2a of the cartridge 1.

When the sheet staple 2 in the cartridge 1 is fed by the feeding device, the driving device is operated to rotate the feeding rollers 30 and 31. Since the force obtained by adding the spring pressure of the coil spring 16 for pressing to the weight of the stacked sheet staples 2 acts on the lowermost sheet staple 2a of the cartridge 1, the rear feed roller 31 and the lowermost sheet staple 2a are operated. There is a great frictional force between and. Therefore, the lowermost sheet staple 2 a is fed forward from the outlet 5 by the rotation of the rear feed roller 31. At this time, both sides of the sheet staple 2a are fed while being supported by the inner surface of the stepped portion 8 of the guide portion 6, and the lower surface of the sheet staple 2a is supported by the supporting projections 23 of the side wall 22 of the magazine 20. When the sheet staple 2a comes into contact with the front feed roller 30, the sheet staple 2a is fed by the front feed roller 30 as shown in FIG. At this time, since the roller contact portion of the sheet staple 2a is pressed toward the opening 7, the left and right opening portions 7 and the guide portions 6b (see FIG. 3) on both sides of these opening portions 7 relatively. The sheet staple 2a is pressed downward. As a result, the frictional force between the lower surface of the sheet staple 2a and the front feed roller 30 is large, but sliding resistance due to the frictional force does not work on the upper surface of the sheet staple 2a corresponding to the opening 7. The feed force of the front feed roller 30 is not reduced by the sliding resistance of the upper surface of the sheet staple 2a.
Therefore, the sheet staple 2a can be reliably fed.

Further, since a part of the roller contact portion of the sheet staple 2a is supported by contacting the lower surface of the guide portion 6, even if it is pressed against the front feed roller 30, it is extremely difficult to deform. Therefore, the sheet staple 2a is not deformed during feeding and cut and separated.

Although the above-described example is an example in which the opening 7 is formed in the guide portion 6, instead of such an opening 7, the lower surface of the guide portion 6 does not come into contact with the upper surface of the sheet staple 2a. A configuration may be used in which a recess is formed.

Further, at the front end of the magazine 20, for example,
Like the one shown in Jitsukaihei 2-61583 ,
Forming means for bending the sheet staple 2a sent by the above-mentioned feeding device into a U-shape in order from the leading staple, driver means for ejecting the formed staple toward the material to be bound, and these forming means and driver means. A drive mechanism driven by an electric motor is provided. However, since these are not directly related to the main part of the invention, the description is omitted.

[Brief description of drawings]

FIG. 1 is a perspective view of a cartridge according to the present invention.

FIG. 2 is a cross-sectional view of a state where the cartridge is mounted in a magazine of an electric stapler.

3 is a sectional view taken along the line AA of FIG.

FIG. 4 is a diagram illustrating a sheet staple feeding mode.

[Explanation of symbols]

 1 Cartridge 2 Sheet Staple 3 Storage 5 Outlet 6 Guide 7 Opening

Claims (1)

[Scope of utility model registration request] 1. A sheet staple formed by connecting straight staples in a sheet shape is stored in a stacked state, and a lowermost sheet staple is led forward to a lower end of a front wall of a storage section having an open front portion of a bottom portion. And a guide portion for guiding the upper surface of the sheet staple pulled out forward from the above-mentioned outlet, and the lower surface of the guide portion is provided with an electric stapler at the top.
To the feed roller that feeds the lower sheet staple forward
A cartridge for an electric stapler, characterized in that a recess or an opening is formed at a position facing each other .