JP2000071665A - Thin type loose-leaf binding tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a binding tool wherein an outer fitting binding tool is formed of a structure as simple as possible and manufactured inexpensively and opened and closed easily, the closing force of a binding ring is sufficient by large and the binding ring can be opened widely and securely so that the addition or replacement of a loose-leaf is available easily when it is required. SOLUTION: A loose-leaf binding tool is provided with a first shaft 1 for standing up a semi-annular binding ring 3 of a first unit at the given intervals, a second shaft 2 for standing up a second binding ring 4 being hit with the binding ring 3 on the free end at the given intervals and an elastic sheath 5 for straining the first and second shafts together on an inner side in the state of hitting each other, and also support allowing the rotation of both shaft 1 and 2 are provided on the inner sides of both shafts 1 and 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loose-leaf binding device, and more particularly to a thin binding device.

[0002]

2. Description of the Related Art Conventionally, in order to bind an album or a loose leaf, a semi-annular binding ring is directly inserted into a binding hole of a loose leaf or the like without using a spine cover (a so-called external binding tool). )It has been known. This type of binding device requires a mechanism that is as simple and inexpensive as possible, is easy to open and close, and has a sufficiently large closing force for the binding ring.
The opening of the binding ring at the time of opening needs to be large so that the loose leaf can be easily added or replaced when necessary. For example, in the technique described in Utility Model Registration No. 3001068, 2 The mold is expensive due to the insertion of the two elongated substrates into each other and requires a detent at the longitudinal middle of the substrate to prevent the binding ring from easily opening in the closed state. In addition, when the substrate is opened, the two substrates are separated from each other, so that there is a problem that it takes time to replace and replace the loose leaf.

[0003]

As described above, the conventional thin external binding device is expensive in its mold, and is detented at the longitudinal middle portion of the substrate so that the binding ring is not easily opened in the closed state. This is not easy to open because of the necessity, and the two substrates are separated from each other at the time of opening. The present invention solves these problems, and the external binding device has a mechanism that is as simple and inexpensive as possible, can be easily opened and closed, and the closing force of the binding ring is sufficiently large. An object of the present invention is to provide a binding device that is mainly reliable when the opening of the binding ring at the time of opening can be enlarged so that replacement can be easily performed.

[0004]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a first set of semi-annular staples which are erected at predetermined intervals, and a free end which abuts against the first set of staples. A second shaft body which is erected at a predetermined second interval with a second semi-annular binding ring that can
The first and second shafts are made of an elastic body or body for restraining the inner shafts in a state where they abut against each other, and a fulcrum that allows the rotation of the two shafts is provided on the inner side of the both shafts. The above problem is solved by the loose leaf binding device provided. ADVANTAGE OF THE INVENTION According to this invention, the binding mechanism at the time of opening so that the mechanism of a binding device is simple, can be manufactured cheaply, is easy to open and close, the closing force of the binding is large enough, and loose leaves can be easily added or replaced. When the opening can be made large, a secure binding device is mainly provided. Preferably, the fulcrum provided on the inner side of the first and second shafts comprises a projection and a groove provided to be fitted to each other on both shafts. This facilitates alignment and assembly of the two binding rings. Further, preferably, the inner sides of the first and second shafts each have an abutment plane which abuts each other at the time of opening in order to define a limit of opening of the first and second sets of binding rings to each other. Have. Thereby, the degree of opening of the binding ring can be properly adjusted, and both shafts are securely held. Further, by providing a manual operation member at least at one end of the both shafts, the opening and closing operation of the binding ring can be facilitated. Further, preferably, a ridge is formed on the outer edge of the first and second shafts, and the ridge abuts against the inner surface of the elastic sheath to ensure the closed state of the binding device. be able to.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to an embodiment shown in the drawings. FIG. 1 is a front view of the binding device of the present invention, FIG. 2 is a left side view, and FIG. 3 is a rear view. The binding device has an elongated first shaft 1 and a second shaft 2 which abut each other on the inner side.
A plurality of semi-annular binding rings 3 and 4 integrally formed at predetermined intervals along the longitudinal direction of the shaft bodies 1 and 2 and whose free ends can abut against each other; Of elasticity that restrains The shafts 1 and 2 and the semi-annular binding rings 3 and 4 are integrally formed from a tough resin such as polypropylene or polycarbonate, respectively, and the sheath 5 is made of a highly elastic metal.

The shafts 1 and 2 have a substantially circular cross section, and when their inner sides are opened so as to regulate the open positions of the bindings 3 and 4 as shown in FIG. No. 1
It has a plane part 11 and a second plane part 12, respectively. Similarly, the first position is set so as to regulate the position when the bindings 3, 4 are closed.
The third flat portion 13 and the fourth flat portion 14 may be formed on the shaft 1 and the second shaft 2, respectively, but are not necessarily required because the free ends of the binding rings 3 and 4 abut. Shaft 1,
The most inwardly protruding portion of the inner side of 2 where these planes meet provides a fulcrum for the two shafts 1, 2 to be able to pivot. The fulcrum part is preferably formed with a recess 9 along its axis and a ridge 10 which fits therein, this part providing a fulcrum for the pivoting of the shafts 1, 2. Further, the fitting of the projection and the recess facilitates the positioning of the shaft bodies 1 and 2 and facilitates the assembly.

The sheath 5 has a partially elliptical cross section as shown in FIGS. 5, 6 and 7, and surrounds and restrains the shafts 1, 2. When the binding is released and the state shown in FIG. 6 is reached, the shaft body does not protrude even when an external force is applied or a force in the opening direction is applied, and the position of the upper edge of 5 is determined. I have. That is, the position regulation at the time of opening the binding is performed by the sheath 5 and the flat portions 11 and 12 of the shafts 1 and 2.

At least one end (both ends in the embodiment) of the shafts 1 and 2 is provided with an operation unit for rotating the shafts to open and close the binding. As shown in FIG. 4, the operation unit includes an operation plate 6 integrally provided at an end portion of the shaft 1 and an extension integrated with the shaft 2, and the operation plate 6 extends over the extension of the shaft 2. A working surface 8 is provided which can be stopped. Reference numeral 7 denotes a finger hook. As shown in FIG. 4, by operating the operation plate 6 to rotate the shafts 1 and 2 around the fulcrum to the positions where the binding rings 3 and 4 are closed, the operation surface 8 becomes the extension of the shaft 2. Acts to lock both shafts 1 and 2 on each other. To release the two binding rings, the operation plate is operated to rotate the pivot in the opposite direction, and the state shown in FIG.
By abutting each other, a gap necessary for replacement of the loose leaf is obtained between the tips of the binding rings 3 and 4.

FIGS. 8 and 9 show another embodiment of the present invention.
Similar to the above embodiment, but in this example, ridges 15, 16 extending in the axial direction of the binding device along the outer surfaces of the shafts 1, 2.
Are formed integrally so that each of these ridges contacts the inner surface of the sheath 5. As a result, these ridges 15,
Up and down movement of the shaft bodies 1 and 2 around the fulcrum 16 becomes possible,
As a result, in the state of FIG. 8, the bottom surface of the shaft body can be configured to hardly contact the inner surface of the sheath, so that the binding rings 3 and 4 can be securely closed.

[0010]

As described above, according to the present invention, a shaft having a semi-annular binding ring, in particular, a shaft in which a shaft having a circular cross section is restrained by elastic sheath is constituted, so that the size of the binding is reduced. In particular, it can be configured to be a thin type required as an external binding device. Furthermore,
Since the binding device of the present invention has a simple structure, the structure of the molding die is simplified, and the material cost and the manufacturing cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view of a binding device of the present invention.

FIG. 2 is a side view of the binding device of the present invention.

FIG. 3 is a rear view of the binding device of the present invention.

FIG. 4 is an enlarged end view of the binding device of the present invention.

FIG. 5 is a sectional view taken along line VV of FIG. 1;

FIG. 6 is a cross-sectional view similar to FIG. 5 in a state where the binding is opened.

FIG. 7 is a sectional view similar to FIG. 5, with parts exploded.

FIG. 8 is an enlarged side view of a portion of FIG. 5;

FIG. 9 is an enlarged end view of a binding device according to another embodiment of the present invention.

FIG. 10 is a cross-sectional view similar to FIG. 9 with the binding closed.

[Explanation of symbols]

 1, 2 shaft body 3, 4 semi-annular binding ring 5 elastic sheath 6 operation plate 8 working surface 9 recess 10 ridge 11, 12, 13, 14 plane portion 15, 16 ridge

Claims (5)

[Claims] 1. A first shaft body having a first set of semi-circular stitches standing at predetermined intervals, and a second semi-circular stitch that can abut against the first set of semi-circle stitches at a free end. A second shaft body standing upright at the above-mentioned predetermined interval; and an elastic sheath for restraining the first and second shaft bodies in a state where the first and second shaft bodies abut each other on the inner side. A loose-leaf binding device provided with a fulcrum that allows rotation of both shafts on the inner side of the shaft. 2. The loose-leaf binding device according to claim 1, wherein the fulcrum provided on the inner side of the first and second shafts comprises a projection and a groove provided so as to be fitted to each other on both shafts. 3. The inner sides of the first and second shafts define an abutment plane that abuts each other during the opening to define a limit to which the first and second sets of stitches are open to each other. The loose-leaf binding device according to claim 1, wherein the binding device has a loose-leaf binding device. 4. The loose-leaf binding device according to claim 1, further comprising a manual operation unit provided at at least one end of said both shafts for rotating said two shafts relative to each other. 5. The projection according to claim 1, wherein a ridge is formed on an outer edge of the first and second shafts, and the ridge contacts the inner surface of the elastic sheath. Loose leaf bindings.