JPH0718538Y2 - 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 cartridge for accommodating a sheet staple, which is used in an electric stapler of the type in which a sheet staple is bent and formed into a U-shape and is ejected.

[Prior art and its problems]

Generally, a cartridge of this type stores sheet staples formed by connecting straight staples in a sheet form in a stacked state and is used by being mounted in a magazine of an electric stapler. The lowermost sheet staple is drawn out forward from the outlet at the lower end of the front wall of the storage portion of the mounted cartridge, and the discharged sheet staple is bent and formed in a U-shape in order from the leading staple. And, in the cartridge
As shown in No. 34854, a pressing device is provided for pressing the entire stored sheet staples downward to improve the feeding. In this pressing device, since the pressing spring is provided at the center, the internal sheet staple is pressed downward as a whole.

Therefore, when a sheet staple having a shape in which the center is bent downward and is warped as a whole is located at the lowermost layer in the cartridge and is ejected from the outlet, the front end of the warped lowermost sheet staple is guided. It may get caught in the exit and not be guided out smoothly. Further, the electric stapler magazine is provided with a feeding unit that feeds out the lowermost sheet staple of the cartridge and feeds it to the front side. Since the contact area with the lower sheet staple is very small, the feed roller needs to be provided in front of the bottom of the cartridge. Therefore, the pressing device of the cartridge needs to correspond to this.

[0004]

An object of the present invention is to solve the above-mentioned problems, and in particular to provide a cartridge which can surely and smoothly lead out the sheet staple in the cartridge and which is most suitable for an electric stapler using a roller as a feeding means. Is its purpose.

[0005]

In order to achieve the above object, the cartridge of the electric stapler according to the present invention accommodates sheet staples formed by connecting straight staples in a sheet shape in a stacked state and at the bottom of the stapler. At the lower end of the front wall of the storage part having the open part, a leading-out port for leading the lowermost sheet staple forward is formed, and a guide part for guiding the upper surface of the leading sheet staple is projected forward from the leading-out port. In the formed cartridge, a lid member is provided on the upper end of the storage section,
A pressing member that presses the stored sheet staples downward is housed inside, and the pressing member has a plate shape that abuts against a standing wall that abuts the inner surface of the storage unit front wall and the upper surface of the uppermost sheet staple. And a spring is interposed between the plate-like portion of the pressing member and the lid member, and the spring force of the spring acts on the front side of the plate-like portion. .

[0006]

[The invented action, effect] According to the above construction, since the bottom of the sheet staples in the cartridge a force plus the spring pressure of the spring for pressing on the weight of the laminated sheet staples are applied, the electric On the feed roller provided on the stapler
So that the lowermost sheet staples come into contact with
When the blade is attached, a large frictional force acts between the feed roller and the lowermost sheet staple. Moreover, since the front side of the sheet staple is pressed downward by the spring, even if the sheet staple is warped, the front side is corrected to be flat. When the feed roller is used as the sheet staple feeding means, the feed force is generated only at a portion where the sheet staple and the feed roller are in contact with each other. Therefore, the feed roller needs to be arranged in front of the bottom of the cartridge. Therefore, in such a feeding device, the feeding roller and the spring for pressing the sheet staple correspond to each other in good positional relationship, and the rotation of the feeding roller causes the strong feeding of the flattened portion of the lowermost sheet staple. It is reliably and smoothly delivered from the outlet by force. Therefore, the present invention is most suitable for the feeding method by the feeding roller.

The pressing member contacts the inner surface of the front wall of the storage section.
The standing wall is always the same because the standing wall that touches is formed.
The posture is maintained. Therefore, between the plate-shaped portion and the lid member
Even if the spring of the plate acts toward the front of the plate, the pressing member tilts.
There is no such thing.

[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 6a of the guide portion 6 is formed at an acute angle. Has been done.

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 locking piece 14 that locks with the protrusion 13 of the front wall 3a of the storage portion 3 is formed so as to hang down.

The pressing member 1 is installed in the storage portion 3 of the cartridge 1.
5 is stored. The pressing member 15 is formed in an L shape from a standing wall 15a that abuts the inner surface of the front wall 3a and a plate-shaped portion 15b that abuts the upper surface of the uppermost sheet staple 2b, and the plate-shaped portion 15b and the lid. A coil spring 16 is interposed between the member 10 and the member 10. The plate-shaped portion 15b is formed to have substantially the same size as the inner dimension of the storage portion 3. The coil spring 16 is arranged on the front side of the plate-shaped portion 15b so that the spring force acts on the front side of the plate-shaped portion 15b. As a result, the sheet staple 2 stored in the storage portion 3 is always pressed downward, and more particularly, the front side of the sheet staple 2 is pressed downward.
Even if the sheet staple 2 is warped, the front side of the sheet staple 2 is straightened. Further, the plate-shaped portion 15b is always kept substantially horizontal by the standing wall 15a. Storage 3
The supporting piece 4 for supporting the lower part of the sheet staple 2 inside is formed only in the rear part of the storage part 3 and the front part is opened, so that when the pressing member 15 presses the front part of the sheet staple 2, The staple 2 falls forward and slips out from the front of the bottom of the storage section 3. However, the pressing member 15
Since the standing wall 15a is formed on the
As a result, the plate-shaped portion 15b is held in a substantially horizontal state when it descends, so that the sheet staple 2 does not drop off from the bottom of the storage portion 3. That is, the pressing member 15 has a function of pressing the front portion of the sheet staple 2 to flatten the front portion of the sheet staple 2 and preventing the sheet staple 2 from falling out of the storage portion 3.

Next, as shown in FIGS. 2 and 3, the cartridge 1 is detachably attached to a magazine 20 provided in the electric stapler. At the center of the magazine 20, a mounting portion 21 for the cartridge 1 that stores the sheet staple 2 is provided. This mounting portion 21 is a support ridge 2 that projects inwardly at the bottom of the side wall 22 of the magazine 20.
3, an engaging groove 24 provided between the front end of the supporting ridge 23 and the lower end of the magazine front wall 32, and a holding shaft 25 provided on the upper rear portion 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 on the mounting portion 21 of the magazine 20, the front end 6a of the guide portion 6 of the cartridge 1 is engaged with 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 of 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 There is a great frictional force between them. Moreover, since the pressing member 15 and the coil spring 16 press the sheet staple 2 particularly on the front side, even if the sheet staple 2 is warped, the front side is corrected to be flat. Therefore, the rotation of the rear feed roller 31 causes the lowermost sheet staple 2a to rotate.
Is reliably and smoothly sent out from the outlet 5. 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 2 is caused by a frictional force between the two.
a is now 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 space between the left and right openings 7 and the guide portions 6b on both sides of these openings 7b.
(See FIG. 3) relatively presses the sheet staple 2a downward. As a result, the sheet staple 2a
Although the frictional force between the lower surface of the sheet feeding roller 30 and the front feeding roller 30 is large, the sliding resistance due to the frictional force does not act on the portion corresponding to the opening 7 on the upper surface of the sheet staple 2a. The feeding force by the sheet staple 2a
Is not diminished by the sliding resistance of the upper surface of. Therefore, the sheet staple 2a can be reliably fed.

At the front end of the magazine 20, the sheet staple 2a sent by the above-mentioned feeding device is bent into a U-shape in order from the leading staple in the same manner as that shown in Japanese Utility Model Publication No. 63-34854. Means, driver means for ejecting the formed staples toward the material to be bound, and a drive mechanism for driving the forming means and the driver means by an electric motor are 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]

 DESCRIPTION OF SYMBOLS 1 Cartridge 2 Sheet staple 3 Storage part 5 Outlet port 6 Guide part 15 Pressing member 15a Standing wall 15b Plate part 16 Coil spring

Claims (1)

[Scope of utility model registration request] 1. A sheet staple formed by connecting straight staples into a sheet shape is stored in a stacked state, and a lowermost sheet staple is led out forward at a lower end of a front wall of a storage section having an opening at a bottom. And a lid member provided at the upper end of the accommodating portion, in which a guide portion for guiding the upper surface of the sheet staple pulled out is formed forward from the outlet opening. A pressing member that presses the stored sheet staples downward is housed in the pressing member, and the pressing member includes a standing wall that abuts the inner surface of the storage unit front wall and a plate-shaped portion that abuts the upper surface of the uppermost sheet staple. And a spring is interposed between the plate-like portion of the pressing member and the lid member, and the spring force of the spring acts on the front side of the plate-like portion. Cartridge for electric stapler.