JPH02153799A - Paper fastener - Google Patents

Abstract

PURPOSE:To obtain a strong fastener simple in construction and also correspond ing to every type of thickness by a method wherein protrusion parts having a cross section of approximately a saw-tooth form are concentrically provided on a shaft part at predetermined intervals axially, and projection parts having a cross section corresponding to grove parts formed by the protrusion parts are provided on a nest hole. CONSTITUTION:In an inserting member 1, a head part 3 is provided, and on a shaft part 4 extending therefrom protrusion parts 5 having a cross section of nearly a saw-tooth form and slanting downwards are concentrically provided at predetermined intervals axially. On the contrary, in a nest member, at least one projection part 8 having a cross section of a shape corresponding to groove parts 6 formed by the protrusion parts 5 on the shaft part 4 is provided on a nest hole. The projection parts 8 may be, of course, provided by two or more stages at approximately the same interval as that of the protrusion parts 5 of the shaft part, and two or more cutouts 9 are provided on the periphery of the projection parts 8.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a fastener that is fixed to an insertion hole of a paper note or the like.

(Prior Art) Conventionally, to bind paper notes with punched holes or computer sprocket papers, book-type papers with thick paper or synthetic resin covers have been mainly used. Since the cover itself is bulky, such a binding tool is not necessarily good in terms of space factor when making various separate volumes, and is also relatively expensive.

Binding tools without a cover are also known, but the tightening force is weak, and there is no known binding tool that can be used appropriately when the thickness of paper notes to be bound differs.

In particular, the computer sprocket paper mentioned above, etc.
Because there is no suitable binding tool, the books are often bound with clips and distributed as separate volumes, but in this case as well, there are problems in terms of handling, such as they tend to come off easily and are difficult to turn over because they are fastened in one place.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned drawbacks, and provides an inexpensive binding tool that has a simple structure, is strong, and can be applied to various thicknesses.

(Structure of the Invention) The present invention provides a fastener comprising an insertion member having a head at the upper part of a shaft portion, and a fitting member having a fitting hole that fits into the shaft portion. The projections having a substantially serrated cross section are provided concentrically and at predetermined intervals in the axial direction, and the fitting hole has at least one step of projections having a cross section corresponding to the groove formed by the projections. The projection provided in the fitting hole is
At least two notches can be provided on the periphery of the protrusion, and at least two notches can be provided on the periphery of the protrusion provided on the shaft of the insertion member.

The cross-sectional shape of the protrusion provided in the fitting hole is a cross-sectional shape corresponding to the groove formed by the protrusion of the insertion member as described above. This is not a meaning, and as described in the following embodiments, it is sufficient to fit them appropriately, and various shapes can be applied in terms of design.

The insertion member and the fitting member are preferably made of synthetic resin, but one can also be made of a light alloy.

FIG. 1 for explaining an embodiment of the present invention is a perspective view for explaining the embodiment, in which 1 is an insertion member and 2 is a fitting member. 2 is a front view of the insertion member in FIG. 1, FIG. 3 is a top view of the fitting member in FIG. 1, and FIG. 4 is a sectional view taken along line A-A in FIG.
is a head, 4 is a shaft, 5 is a protrusion, 6 is a groove, 7 is a fitting hole, 8 is a protrusion, and 9 is a notch.

The insertion member 1 has a head 3, and a shaft portion 4 following the head 3 includes:
A protrusion 5 having a substantially serrated cross section with the downward facing surface being an inclined surface.
are provided concentrically and at predetermined intervals in the axial direction. It is more advantageous in terms of strength to provide the tip of the protrusion with a slightly flat portion than with a sharp end. The outer diameter of the shaft, that is, the diameter from peak to peak of the protrusions, should be approximately the same as the diameter of a binding hole that cannot be made on paper notes, etc. The interval between the protrusions should be, for example, 1 ugly, A groove 6 is formed between the portion and the protrusion. Of course, this interval does not need to be limited to 1 m, and can be designed to an appropriate value in consideration of the diameter and material of the insertion member, the object to be fixed, etc.

The cross-sectional shape of the shaft portion is not limited to a circular shape, and may be any suitable shape such as a quadrangular shape or a hexagonal shape.

On the other hand, the fitting member has the shaft portion 4 in its fitting hole.
At least one stage of protrusions 8 having a cross-sectional shape corresponding to the groove 6 formed by the protrusions 5 is provided. Of course, the protrusions 8 are spaced apart from each other with an interval comparable to that of the protrusions 5 on the shaft.
It is possible to provide more than one stage. The protrusion 8 is provided with two or more, for example, four, notches 9 on its circumference.

Since the notch 9 imparts appropriate elasticity to the protrusion and facilitates insertion, it may be provided on the protrusion of the shaft instead of on the protrusion of the fitting member. It may be provided on both the protrusion of the shaft and the protrusion of the shaft.

FIGS. 5 and 6 are partial cross-sectional views showing other shapes of the protrusion and groove in other embodiments. 5 indicates a protrusion, and 6 indicates a groove.

For example, in the case of computer sprocket paper, the insertion member is inserted into some of the holes in the ears, and the fitting member is pushed into the shaft of the insertion member from the opposite side.
At this time, the notch 9 gives appropriate elasticity to the protrusion 8,
Facilitates insertion of the mating member. When the paper note, etc. is tightened, the protrusion of the fitting member bites into the groove of the shaft and fixation is achieved.0 If the length of the stem is too long for the thickness of the paper note, It can be easily handled by cutting near the fitting member using a suitable tool.

In addition to paper notes, it can also be used to fix plate-like objects of appropriate thickness.

(Effects of the Invention) As described above, according to the present invention, since the protrusion of the shaft portion is serrated, it is easy to insert into the fixing hole for fixing, and moreover, it can be firmly and permanently fixed, which is effective. .

This effect is optimal when used as a binding tool for paper notes.

[Brief explanation of the drawing]

FIG. 1 is a perspective view for explaining the embodiment, and FIG. 2 is a perspective view for explaining the embodiment.
FIG. 3 is a front view of the insertion member in FIG. 1, FIG. 3 is a top view of the insertion member in FIG. 1, and FIG. 4 is a sectional view taken along line AA in FIG. 3. FIGS. 5 and 6 are partial cross-sectional views showing the shapes of protrusions and grooves in other embodiments. 1... Insertion member, 2... Fitting insertion member, 3... Head,
4... Shaft part, 5.8... Projection part, 6... Groove part, 7
... Fitting hole, 9... Notch. Patent applicant: Koiga Co., Ltd. (and one other person) Agent Yasuo Ishii

Claims (3)

[Claims] (1) Consisting of an insertion member having a head at the top of the shaft, and a fitting member having a fitting hole that fits into the shaft, the shaft has a protrusion with a substantially serrated cross section. A paper note, characterized in that the fitting hole is provided with at least one stage of protrusions having a cross-sectional shape corresponding to the groove formed by the protrusion, which are provided concentrically and at predetermined intervals in the axial direction. etc. fasteners. (2) The fastener for paper notes or the like according to claim 1, wherein the protrusion provided in the fitting hole has at least two notches on its circumference. (3) The paper note or the like according to claim 1 or 2, wherein the protrusion provided on the shaft of the insertion member has at least two notches on its circumference. stopper.