JPH0890975A - Binding tool for loose-leaf binder - Google Patents

Abstract

PURPOSE: To sufficiently fold back paper. CONSTITUTION: A binding tool for a loose-leaf binder is composed of respective connecting rods 11, 12 arranged in parallel along a longitudinal direction, and respective binding pieces 13, 14 wherein base end parts are connected to outside surface of the connecting rods 11, 12 and they are protruded in an almost semicircular arc state to be formed at specific intervals from the connecting rods 11, 12. A fit-receiving part 16 and a fitting part 17 which connect freely detachably the connecting rods 11, 12 with each other are formed on inside faces of the connecting rods 11, 12. An almost circular ring-formed binding ring is formed with the binding pieces 13, 14 by holding of the fit-receiving part 16 and the fitting part 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loose-leaf binder binding device for detachably binding sheets such as notebooks and documents.

[0002]

2. Description of the Related Art As a binding tool for loose-leaf binders of this type, for example, the applicant of the present invention has previously proposed it, and the actual binding method has been proposed.
7-3819, JP-B-57-5173 and JP-B-57-18148, and JP-A-51-133517, which was filed by another person. A conventional binding device including these is
For example, as shown in FIG. 6, from the upper surfaces of the pair of wide and flat open / close boards 1 and 2 which are arranged adjacent to each other in parallel, arc-shaped binding pieces 4 for locking and holding the paper 3 at a predetermined interval. , 5
Are formed so as to project inwardly facing each other.
Between the opening and closing operation means 6 for joining or separating the tips of the binding pieces 4 and 5 and the opening and closing substrates 1 and 2 so as not to spread the binding ring formed by the binding pieces 4 and 5. A connecting means 7 for holding and holding is provided. As the above-mentioned connecting means, for example, as in the case of a binding tool disclosed in Japanese Utility Model Publication No. 57-3819 or Japanese Utility Model Publication No. 57-5173, one end side of each opening / closing board is pivotally attached to the other end side which is opened / closed in an arc shape. There is a lock holding mechanism provided on the both sides of each opening / closing board such as a binding tool disclosed in Japanese Utility Model Laid-Open No. 51-133517, which is separable.

[0003]

As in the case of the conventional loose-leaf binder binding tool described above, when the arc-shaped binding pieces are formed so as to project on the upper surface of each open / close board having a wide flat plate shape, The base end side of the binding ring formed by joining is formed with a lateral width that is approximately equal to or slightly narrower than the maximum outer diameter of the binding ring, and the inner shape of the binding ring in which sheets are bound is the maximum inner diameter of the binding ring. It is formed into a semi-cylindrical shape with a base width that is approximately equal to or slightly narrower than. The paper bound in the binding ring having a kamaboko shape with its inner shape cannot be sufficiently folded back to the outside due to the limitation of the wide bottom surface, and is usually almost horizontal as shown in FIG. The limit was to fold it slightly outward from the horizontal. Therefore, for example, if the paper is copied while being bound, the vicinity of the through hole formed in the paper may not be copied, or the paper may be cracked around the outside of the through hole. In that case, there is a trouble that the sheet must be once removed from the binding tool. In addition, even if a pressing force is applied to the binder in use from the top of the paper by placing it on a desk, the paper may be cracked or broken around the outside of the through hole. Yes,
There was room for improvement. Note that there is also an existing binder that uses a binding tool that winds a helical linear material that is also used in a calendar or the like into a through hole, but in the case of this binding tool, paper can be freely attached and detached. Therefore, it cannot be applied to the loose-leaf binder binding device targeted by the present invention. Therefore, it is an object of the present invention to provide a loose-leaf binder binding device that can solve the problems of these conventional techniques.

[0004]

In order to solve the above problems, a loose-leaf binder binding device according to the present invention comprises connecting rods arranged in parallel along the longitudinal direction,
A base end portion is connected to an outer surface of the connecting rod, and each binding piece is formed to project from the connecting rod in a substantially semicircular shape at predetermined intervals. A locking receiving portion and a locking portion that detachably connect the connecting rods are formed, and the binding piece forms a substantially annular binding ring by locking and holding the locking receiving portion and the locking portion.

[0005]

EXAMPLES A loose-leaf binder binding device according to the present invention will be described in detail below with reference to the examples shown in FIGS. The binding device 10 includes connecting rods 11 and 12 extending in parallel along a longitudinal direction as shown in FIG.
From the outer surface of the connecting rods 11 and 12, a large number of binding pieces 13 and 14 each having a substantially semi-arcuate shape are formed so as to project inwardly facing each other at predetermined intervals. Connecting rod 1
Reference numerals 1 and 12 denote adjacent binding pieces 13 or binding pieces 14 which are adjacent to each other.
Are provided over the entire area in the longitudinal direction in such a manner that the base end sides of the binding pieces are connected to each other, but the binding pieces 13 and the tips of the binding pieces 14 are provided between the connection rod 11 and the connection rod 12. A hinge portion 15 is provided so that the sides can be joined or separated from each other through a thin and flexible connecting piece. With this hinge portion 15, the connecting rod 11
The connecting rod 12 is openably and closably connected, but the hinge portion 15 may be provided over the entire area in the longitudinal direction.
In this embodiment, they are locally provided at predetermined intervals.
There is also a mode in which the above-mentioned hinge portion 15 is omitted and the binding pieces 13 and the binding pieces 14 are separated between the connecting rod 11 and the connecting rod 12.

Further, on the inner side surfaces of the connecting rods 11 and 12, there are provided a lock receiving portion and a locking portion which are fitted and locked with each other. A locking receiving portion is formed by the dovetail-shaped locking projections 16,
A locking portion is formed on the inner surface of the connecting rod 12 by a dovetail-shaped locking groove hole 17. The locking projection 16 and the locking groove hole 17 may be provided over the entire area in the longitudinal direction, but in this embodiment, for example, they are locally provided at predetermined intervals in a manner adjacent to the hinge portion 15 described above. At other points, the inner side surfaces of the connecting rods 11 and 12 are formed into flat surfaces. In addition, a fitting protrusion 18 and a fitting groove 19 are provided on the tip ends of the binding pieces 13 and 14 so that the joined binding pieces 5 and 13 are fitted and locked to each other so as not to shift in the front-back or up-down directions. In this embodiment, the fitting protrusions 18 and the fitting recessed grooves 19 are alternately formed on the respective binding pieces 13 and 14, but the fitting projections 18 and the fitting recessed grooves 19 are fitted to the tips of one of the binding pieces 13 and 14. The mating protrusion 18 is fitted into the other end to form a concave groove 19
Is also provided. Each of these parts is integrally molded with a synthetic resin material, such as polypropylene, which is relatively flexible and has excellent mechanical strength against pulling and compression. The binding tool 10 includes binding pieces 13 and 14 shown in FIG.
When the binding ring is formed from the open state to the closed state of FIG. 1D, the locking protrusion 16 and the locking groove hole 17 utilize the flexibility of the material and are fitted together in a press-fitted state. Then, the connecting rods 11 and 12 are connected and held.

Next, other embodiments of the binding device according to the present invention will be described with reference to FIGS. 2 to 5. In these binding devices, the base end portions of the binding pieces 13 and 14 are provided on the outer surface of the first embodiment. A lock receiving portion and a lock portion having a different lock structure are provided on the inner side surfaces of the attached connecting rods 11 and 12.
The structure other than the above is almost the same as that of the first embodiment, and various modifications described in the first embodiment can be adopted.

FIG. 2 shows a binding tool 20 according to the second embodiment. In this binding tool 20, a spherical locking projection 21 is formed as a locking receiving portion from the inner side surface of the connecting rod 11, and a connecting rod 20 is formed. On the inner side surface of 12, an engaging groove hole 22 in the shape of a counterbore is formed as an engaging portion. Binding pieces 13, 1
2 is changed from the open state of FIG. 2 (b) to the closed state of FIG. 2 (a) to form a binding ring, the locking projection 21 is inserted into the locking groove hole 22 in a press-fitting state, and is connected. Rod 11,1
2 is connected and held. The locking projections 21 and the locking groove holes 22 of the binding device 20 are provided at a plurality of positions at predetermined intervals along the longitudinal direction of the connecting rods 11 and 12. The connecting rods 11 and 12 are connected to the hinge portion 1 as shown in the drawing.
There is a mode in which the hinge portion 15 is connected in advance and a mode in which the hinge portion 15 is not provided and is separated.

In the binding device 30 according to the third embodiment shown in FIG. 3, a locking groove hole 31 in the shape of a counterbore is formed on the inner surface of the connecting rod 11 as a locking receiving portion, and the connecting rod 12 has a locking groove. A disk-shaped locking protrusion 32 is formed on the inner surface so as to project as a locking portion. When the binding pieces 13 and 14 are changed from the open state of FIG. 2B to the closed state of FIG. 2A to form the binding ring, the locking projection 32 is pressed into the locking groove hole 31. It is inserted and the connecting rods 11 and 12 are connected and held.
Also in the case of this binding device 30, the locking slot 31 and the locking projection 3
2 is provided at a plurality of locations, and there are two modes depending on the presence or absence of the hinge portion 15.

In the binding device 40 according to the fourth embodiment shown in FIG. 4, complementary insertion groove portions are formed on the inner surface of each of the connecting rod 11 and the connecting rod 12 by the concavo-convex surfaces that are fitted to each other. An engagement receiving portion and an engagement portion that form 41 and 42 are provided. When the binding pieces 13 and 14 are changed from the open state of FIG. 2B to the closed state of FIG. 2A to form the binding ring, the insertion groove portion 41 and the insertion groove portion 42 have flexibility. The connecting rods 11 and 12 are connected and held by being engaged in a loosely fitted state. In the case of this binding device 30, the insertion groove portion 4
1 and the insertion groove portion 42 may be locally provided along the longitudinal direction of the connecting rods 11 and 12, but it is desirable to continuously provide the connecting rods 11 and 12 in terms of workability. Hinge part 15 so as not to separate in the horizontal direction
It is necessary to connect via.

In the binding device 50 according to the fifth embodiment shown in FIG. 5, an elongated engaging groove hole 51 is formed along the longitudinal direction on the inner surface of the connecting rod 11 as an engaging portion. On the inner side surface of the working rod 12, two parallel protruding strips 52 are formed as locking portions along the longitudinal direction, and the connecting rod 11 and the connecting rod 12 are formed separately. Also,
The locking groove hole 51 is formed such that both ends in the longitudinal direction are wide, and the end of the parallel protrusion 52 is inserted into either one of the both ends and slid, or the parallel protrusion 5 is inserted.
By using the flexibility of 2 to press fit, the locking slot 5
Connecting rod 1 by fitting parallel ridge 52 in 1
1, 12 are connected and held.

As in the above embodiments, the binding device 10,
20, 30, 40, and 50 are connection rods 11 and 12 arranged in parallel along the longitudinal direction, and the base end portions are connected to the outer surfaces of the connection rods 11 and 12, and the connection rods are connected to each other. The connecting rods 11 and 12 are formed on the inner side surfaces of the connecting rods 11 and 12 so as to protrude from the connecting rods 11 and 12 in a substantially semicircular shape at predetermined intervals.
A lock receiving portion and a lock portion that removably connect the 12 are formed, and the binding pieces 13 and 14 form a substantially annular binding ring by the lock holding of the lock receiving portion and the lock portion. I did it. In each of these binding tools, since the sheets are bound in the substantially ring-shaped binding ring, the sheets can be easily rolled or folded without damaging the sheets.

[0013]

As is apparent from the above-described embodiments, the loose-leaf binder binding device according to the present invention does not use a wide flat opening / closing substrate, which is substantially equal to the outer diameter of the binding ring, unlike the binding device according to the prior art. Each binding piece connected via the connecting rod forms a substantially annular binding ring. As a result, the paper bound in the binding loop can be sufficiently folded back to the extent that the front cover and the back cover can be folded, so that even when copying the paper while it is bound, the paper can be removed. It is possible to make a copy up to the vicinity of the through hole without doing so, and there is no fear that the paper will be cracked around the outside of the through hole. In addition, even if the binder is placed on the table and the pressing force is applied to the binder in use near the through hole from above the paper, the paper should be placed in a state close to horizontal and placed with a small gap between the table surface. Since it can be placed, the problem that the paper is cracked or broken around the outer periphery of the through hole is solved.

[Brief description of drawings]

FIG. 1 is a loose-leaf binder binding device according to a first embodiment of the present invention, in which (a) is an overall plan view, (b) is an overall side view, (c) is an overall bottom view, and (d) is. The enlarged front view in the state which closed the binding piece, (e) shows the enlarged front view in the state which opened the binding piece, respectively.

2A and 2B are a loose-leaf binder binding device according to a second embodiment of the present invention, in which FIG. 2A is an enlarged front view with the binding piece closed, and FIG. 2B is an enlarged front view with the binding piece open. , (C) is an enlarged side view of the main part, and (d) is an enlarged bottom view of the main part.

3A and 3B show a loose-leaf binder binding device according to a third embodiment of the present invention, in which FIG. 3A is an enlarged front view of a binding piece closed, and FIG. 3B is an enlarged front view of the binding piece opened. , (C) is an enlarged side view of the main part, and (d) is an enlarged bottom view of the main part.

FIG. 4 is a loose-leaf binder binding device according to a fourth embodiment of the present invention, in which (a) is an enlarged front view of an essential part of the binding piece closed, and (b) is an essential part of the binding piece opened. An enlarged front view is shown, respectively.

FIG. 5 is a perspective view of a main part of a loose-leaf binder binding device according to a fifth embodiment of the present invention.

FIG. 6 is an enlarged front view of a main part of a binder of a loose-leaf binder according to a conventional example, showing a part of the binder in section.

[Explanation of symbols]

 10, 20, 30, 40, 50 Binders 11, 12 Connecting rods 13, 14 Binder pieces 15 Hinge parts 16, 21, 32 Locking protrusions 17,51 Locking groove holes 18 Fitting protrusions 19 Fitting concave grooves 22 , 31 Locking groove hole 41, 42 Insertion groove portion 52 Parallel protrusion

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[Procedure amendment]

[Submission date] December 26, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 5 is a loose-leaf binder binding device according to a fifth embodiment of the present invention , in which (a) is a perspective view of a main part and (b) is a partially enlarged view.
Cross-sectional views are shown respectively .

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 5

[Correction method] Change

[Correction content]

[Figure 5]

Claims (1)

[Claims] 1. A connecting rod arranged in parallel along a longitudinal direction, and a base end portion connected to an outer surface of the connecting rod so as to form a semicircle at a predetermined interval from the connecting rod. A locking receiving portion and a locking portion for detachably connecting the connecting rods are formed on the inner side surface of the connecting rods, the locking receiving portions being formed of respective binding pieces formed in an arc shape. A binding tool for a loose-leaf binder, wherein the binding piece forms a binding ring having a substantially annular shape by holding and holding the locking portion.