JPS6347075A - Stapler - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a stapler using an inverted U-shaped staple.

[Prior Art and its Problems] Conventionally, a base member, a staple accommodating member made of plastic that is rotatably attached to the base member and has a staple punching hole formed at its front end, and a staple accommodating member made of plastic that is rotatably attached to the base member, Staplers are known that include a plastic handle member which is rotatably mounted and has an integrally formed actuating blade at its front end for passing through a staple firing hole in the staple receiving member. In such a stapler, when the plastic actuating blade separates the foremost staple of a group of staples housed in the staple housing member and drives it downward, the actuating blade may be damaged if the separated staple is covered. Since the wear becomes severe, various measures have been taken. For example, it has been proposed to provide a stepped portion at the tip of the actuating plate, and use this stepped portion to hold the head of the inverted U-shaped stable while driving it downward. There has also been a proposal to provide an upright wall adjacent to the front end of the hollow portion of the stable housing member, that is, adjacent to the stable punching hole, and to guide the stable being driven downward by the upright wall.

However, no means has been proposed for preventing the stable from being displaced by the large force generated when the tips of the legs of the inverted U-shaped stable engage with documents to be bound.

[Object of the Invention] An object of the present invention is to provide a means for reliably guiding the downwardly driven stable even after it engages with documents to be bound.

[Structure, operation, and effect of the invention] In order to achieve the above object, the stapler according to the present invention is characterized in that the staple accommodating member has a downwardly extending portion in which a through hole is formed that aligns with the staple punching hole.

In such an arrangement, the stable being driven downwards continues to be guided after engaging the documents to be bound and is not displaced, thus preventing premature wear of the actuating plate.

[Example] The present invention will now be described with reference to the accompanying drawings.

Referring to FIG. 1, the stapler shown here has substantially the same structure as the one proposed by the applicant in another application, and will be briefly described except for parts related to the present invention. Base member J
O has an anvil 12 at the front end, and a groove 1 at the center slightly forward.
It has 4. A staple accommodating member 16 is provided within this groove 14.
A spring piece 18 of the frame (in the figure) is fitted so that the staple accommodating member 16 can rotate relative to the base member 10. Although the staple receiving member or frame 16 is shown to be of substantially the same construction as described in the applicant's co-pending application, it should be understood that it could be a cassette-type staple receiving member. A stable group (not shown) is loaded in the frame 16, and the tweeter device 20 pushes it forward.
The stable is located in a punched-out hole 22 formed adjacent to the front end of the stable. This tweeter device 20 uses a compression coil spring 26 mounted around a rod 24 to bias the feeder piece 28 forward and press the stable group forward. A handle member 30 is pivotally connected to the frame 16 at a pivot pin 32 .
is a spring piece 3 extending diagonally forward from the top wall of the frame 16;
4 in a direction away from the frame 16. The handle member 30 has a portion near its front end that enters into the stable punch-out hole 22 of the frame 16 when the handle member 30 is rotated toward the frame 16 against the force of the spring piece 34. It has an operating blade 36 that moves downward and drives the foremost stable of the stable group downward.

Referring to FIG. 2, the operating blade 36 has a stepped tip, that is, a lower end, and the stepped portion 4 engages with the top surface 42A of the lateral head 42 of the inverted U-shaped stable 40.
4 and a shoulder 46 that engages with the front side surface 42B of the head 42. This prevents the head of the inverted U-shaped stable from being displaced forward.

Furthermore, an upright wall 50 is formed at the front end of the hollow portion 16A of the frame 16, that is, at the end adjacent to the stable punching hole 22, for guiding the rear side of the head 42 of the stable separated from the stable group. be. In this way, the stable 40, which is separated from the stable group and driven downward by the actuating blade 36, is guided and smoothly moves downward as shown in FIG. At this time, if the documents to be bound and the tips of the legs 40A of the stable are not yet engaged, no large force will be applied to the stable 40 and it will not be displaced. However, once the document and the end of the leg of the stable 40 are engaged, a large force is applied to the stable, and the hollow portion 16A of the frame 16 still
The part of the stable 40 that does not cross the hollow part 1
There is a high possibility that it will be displaced toward 6A, that is, backward. Therefore, the head 42 of the stable 40 slides against the tip of the actuating blade 36, resulting in increased wear of the actuating blade 36.

According to the present invention, an extension 52 extending downward is formed at the front end of the frame 16, and a hole 54 is provided extending through the extension 52 in the length direction.
It is aligned with the stable punching hole 22 of No. 6. Therefore, as shown in FIGS. 4 and 5, the operating blade 3
The presence of the extension 52 prevents the stable 40, which is being driven downwardly by the frame 16, from completely traversing the hollow portion 16A of the frame 16 and making contact with the document. Therefore,
When first engaged with a document, the stable 40 is guided entirely by the wall surface of the through hole 54 of the extension portion 52, and is guided in the front-back direction by the engagement recess 48 of the actuating plate 36 and the wall surface of the extension portion through hole 54. Since the stable 40 is guided by the guide, the forces acting on the stable while penetrating the document will not displace the stable 40.

The length of the through hole 54 of the extension portion 52 may be as long as the height of the inverted U-shaped stable, since it is sufficient to guide the stable when it engages with a document.

Additionally, the engagement recess 48 and extension portion 52 of the actuation blade 36
Since it is sufficient to obtain a guiding effect with the wall surface of the through hole 54, the guiding upright wall 50 in the hollow portion 16A of the frame 16 as shown in the figure may not be provided.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a stable having features of the present invention. FIG. 2 is a fragmentary sectional view near the front end of a frame with a downward extension according to the invention. FIG. 3 is a view similar to FIG. 2, showing a different position of the actuating blade. FIG. 4 is a view similar to FIG. 2, showing another working position of the working blade. FIG. 5 is a cross-sectional view of FIG. 4 taken in a different direction. FIG. 6 is a plan view of FIG. 2. In the drawings, 10... Base member, 16... Frame, 22... Stable punching hole, 30... Nodle member, 36... Operating blade, 40... Stable, 42... ...Stable head, 48...Engagement <c, t', 50...Upright wall, 52...Downward extension, 54...Through hole agent Patent attorney Akira Kono Procedure amendment (Spontaneous writing) 1. Display of the case Stapler 3, person making the amendment Relationship with the case Patent applicant

Claims (2)

[Claims] (1) A base member, a plastic staple accommodating member rotatably attached to the base member and having a staple ejection hole formed at the front end, and a staple accommodating member rotatably attached to the staple accommodating member. a plastic handle member having a front end integrally formed with an actuating blade so as to be able to pass through the staple ejection hole of the staple receiving member;
The operating blade has an engagement recess at its tip that engages with an inverted U-shaped staple head to prevent forward displacement of the head, and the staple receiving member has a through hole aligned with the staple firing hole. A stapler having a downward extension with a hole formed therein. (2) The stapler according to claim 1, wherein the length of the through hole in the downwardly extending portion is approximately equal to the height of the inverted U-shaped staple to be punched.