JPH0546860Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement of a staple cartridge that accommodates rectangular staple sheets in a stacked manner.

(Prior art and its problems) Generally, in a stapler in which a straight staple needle is formed into a U-shape and then punched out,
A rectangular staple sheet formed by adhesively connecting the staple needles in the form of a sheet is stored in a cartridge, and the staple cartridge is installed in a magazine and led out from an outlet formed at the lower end of one side wall of the magazine to form a molding section. A method is adopted in which the powder is supplied to the punching section. Further, a large number of horizontally striped uneven stripes are formed on the opposing inner wall surface of the accommodating portion, and a pusher that presses the staple sheet inside downward is arranged, and the pusher has a return prevention piece that engages with the uneven strip. There are some that are formed.

However, since the tips of the staples are sharp, the corners of the staple sheet are also sharp, and edge burrs may appear during manufacturing. Similarly, when molding a staple cartridge, it is technically very difficult to form the corners of the storage section at right angles, and microscopically, the corners end up being rounded. This can result in a phenomenon in which the corners of the storage section get caught on the corners of the staple sheet and cannot move any further down. The cartridge is attached to the rear of the stapler magazine, and the magazine swings up and down, so the staple cartridge also tilts each time. Therefore, the staple sheet is particularly likely to lean to one side against the rear inner wall of the storage section, that is, the inner wall opposite the lead-out port, and the above phenomenon is likely to occur on the rear side. Also,
When forming the uneven strips on the opposing inner wall surfaces of the storage section, molding burrs may occur at the tips of the uneven strips, and the burrs may protrude inward from the inner wall surfaces.
In this case too, the staple sheet may get caught on the burrs and be unable to descend.

(Technical Problem of the Invention) The technical object of the present invention is to provide a staple cartridge which can solve the above-mentioned drawbacks and, in particular, can smoothly lower the staple sheets stacked and stored in the storage section.

(Means for Solving the Problems) In order to solve the above problems, the staple cartridge according to the present invention stores rectangular staple sheets in which straight staple needles are adhesively connected in a sheet shape in multiple stages, The lower end of one side wall has an outlet for the staple sheets, and the opposite inner wall surface has a storage section in which a large number of horizontal stripes are formed. In the staple cartridge, a pusher is arranged, and the pusher is provided with a return prevention piece that engages with the uneven strip, at least at both corner portions of the side wall opposite to the outlet port of the accommodating portion. Forms an escape recess in the vertical direction with which the corners of the staple sheet do not come into contact, and also forms a recess in the vertical direction on the opposing inner wall surface, and has an uneven strip in the recess that engages with the return prevention spring piece. It is characterized by the fact that it has been formed.

(Operations and Effects of the Invention) With the above configuration, relief recesses are formed in the corner portions of the accommodating portion, so when staple sheets are stacked and accommodated in the accommodating portion of the staple cartridge, the corner corners of the staple sheets Since a space is formed between the space and the relief recess at the corner of the storage section, even if there is an edge burr at the corner of the staple sheet, it will not come into contact with the inner wall of the storage section, and the staple sheet will not come into contact with the inner wall of the storage section. You can always descend smoothly.

In addition, since the uneven stripes of the pusher return prevention piece are formed in the recessed portions of the inner wall of the accommodating portion, even if burrs are formed on the uneven stripes during molding, they will be contained within the recessed portions.
It does not protrude inward from the inner wall surface. Therefore, the staple sheet can be smoothly lowered.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In the figure, reference numeral A indicates a staple cartridge. This staple cartridge A has a storage section 2 that stores the above-mentioned rectangular staple sheets 1 in a stacked manner. The staple sheet 1 is sequentially led out from the outlet 3, and is attached to the rear part of the magazine of the stapler with the outlet 3 in front. In addition, side walls 2a and 2b facing each other in the front and back in the housing part 2 are provided.
A large number of horizontally striped uneven stripes 4 are formed on the inner wall surface.

The above staple cartridge A has pusher 5.
is provided. This pusher 5 is arranged above the staple sheets 1 housed inside the housing section 2, and presses these staple sheets 1 downward. Further, the pusher 5 is formed with a return prevention piece 6 that engages with the uneven strip 4, so that even if the staple cartridge A is turned upside down, the return prevention piece 6 engages with the uneven strip 4 and the pusher Since the staple sheet 5 does not move, the aligned state of the staple sheet 1 inside can be maintained.

Therefore, among the staple sheets 1 stacked and stored in the storage section 2, the lowest one is located at a position facing the outlet 3, and is moved to the outlet 3 by an appropriate feeding means.
After the staple sheet 1 is pulled out, the staple sheet 1 in the next stage is pressed by the pusher 5 and passes through the outlet 3.
Descend to the lowest position facing the sky. In this way,
The staple sheets 1 in the storage section 2 are successively lowered and taken out.

Next, in the staple cartridge A, relief recesses 7 are formed in the corners of the accommodating portion 2 in the vertical direction of the staple sheet 1 so that the corners of the staple sheet 1 do not come into contact with each other.

Moreover, the uneven stripes 4 on the opposing inner wall surface of the accommodating portion 2 are formed in recesses 8 formed in the vertical direction on the inner wall surface.

With the above configuration, the relief recesses 7 are formed in the corners of the accommodating portion 2, so that the staple sheet 1
When the staple sheets 1 are stacked and accommodated in the storage section 2 of the staple cartridge A, a space is formed between the corner of the staple sheet 1 and the escape recess 7 of the corner of the storage section 2. Even if there is an edge burr at the corner of the sheet 1, it does not come into contact with the inner wall of the storage section 2, so the staple sheet 1 can always descend smoothly.

Furthermore, since the uneven strips 4 of the return prevention piece 6 of the pusher 5 are formed in the recess 8 of the inner wall of the housing portion 2,
Even if burrs are formed on the uneven strips 4 during molding, they are accommodated within the recesses 8 and do not protrude inwardly from the inner wall surface. Therefore, the staple sheet 1 can be smoothly lowered.

Note that the relief recesses 7 at the corners of the housing portion 2 do not need to be formed at the four corners. They may be formed at least at both corner portions of the side wall 2b on the side opposite to the outlet 3.
The reason for this is that the staple cartridge A swings up and down with the magazine, and each time the magazine moves upward, the staple cartridge A tilts. This is because it tends to be biased toward the inner wall of the side wall 2b.

[Brief explanation of the drawing]

FIG. 1 is a plan view of essential parts of the staple cartridge A according to the present invention, FIG. 2 is an enlarged sectional view of a portion taken along the line X-X in FIG. 1, and FIG. 3 is a side view of the staple cartridge A. FIG. Symbol A: Staple cartridge, 1: Staple sheet, 2: Storage section, 3: Outlet,
4... Uneven strip, 5... Pusher, 6... Return prevention piece, 7... Relief recess, 8... Recess.

Claims (1)

[Claims for Utility Model Registration] Rectangular staple sheets formed by adhesively connecting straight staple needles in the form of sheets are housed in a stacked manner, and have an outlet for the staple sheets at the lower end of one side wall, and an opposite inner wall surface. is equipped with a housing portion in which a large number of horizontal striped uneven stripes are formed, and
A pusher is placed above the staple sheets inside to press these staple sheets downward.
In the staple cartridge in which the pusher is formed with a return prevention piece that engages with the uneven strip, corner portions of the staple sheet are provided at at least both corner portions of the side wall opposite to the outlet port of the storage portion. It is characterized by forming an escape recess in the vertical direction that does not come into contact with the spring, and forming a recess in the vertical direction on the opposing inner wall surface, and forming an uneven strip that engages with the return prevention spring piece in the recess. Staple cartridge.