JP6026697B1 - Loose leaf binding - Google Patents

Abstract

A loose-leaf binding tool capable of realizing an effective opening operation of a half ring portion by a slide opening mechanism without greatly reducing the strength of a substrate. By sliding relative to each other in the longitudinal direction of substrates 2a and 2b at the respective ends of a shaft connecting portion 4 and a shaft gripping portion 6 that are adjacent to each other in the longitudinal direction. A shaft portion slide opening mechanism 8 is provided that causes rotational displacement of the substrates 2a and 2b that separate the tip portions of the paired half ring portions 3a and 3b from each other. [Selection] Figure 1

Description

  According to the present invention, a plurality of pairs of half-ring portions formed on each substrate are brought close to each other by relative displacement and rotational displacement along the longitudinal direction of two substrates extending in parallel to each other. In particular, the present invention relates to a loose-leaf binding device that is configured to be movable between a closed position that forms a ring shape and an open position in which the respective distal end portions are separated from each other, and in particular, the operability of the loose-leaf binding device by a user. We propose a technology that can improve the performance.

As a prior art of this type of loose-leaf binding tool, there is one described in Patent Document 1 by the applicant himself.
In Patent Document 1, the tip portions of the pair of half-ring portions are formed by sliding in contact with each other in accordance with the relative displacement along the longitudinal direction of the substrate at each of the adjacent portions of the two substrates. There is described a loose-leaf binding device provided with a slide opening mechanism for causing rotational displacement of substrates separated from each other.

  In the loose-leaf binding tool described in Patent Document 1, the user performs an operation of relatively displacing the substrate along the longitudinal direction, so that the substrate is displaced in the direction in which the half ring portion is opened by the slide opening mechanism. As a result, the half-ring portion moves to the open position without performing the rotational displacement of the substrate as a further operation of the user after the relative displacement. As a result, this loose-leaf binding tool has the advantage that the operability by the user can be improved.

Japanese Patent No. 5792405

By the way, in the loose-leaf binding tool disclosed in Patent Document 1, the protrusion having the guide inclined surface as the slide opening mechanism, the protrusion receiving groove, and the like are arranged on the substrate away from the both-end fixed shaft that becomes the rotation center when the substrate is rotated and displaced. It is provided at a predetermined position.
Therefore, the slide opening mechanism is provided at a position of the substrate that is far from the center of rotation when viewed in the cross section of the substrate, and thus the protrusion height of the protrusion is increased to some extent. Otherwise, a sufficiently large rotational displacement between the substrates could not be generated, and the opening angle of the half ring portion that could be realized by the slide opening mechanism was limited.

On the other hand, in the above loose-leaf binding device, since the substrate is provided with a slide opening mechanism such as a protrusion and a protrusion receiving groove, the reduction in the rigidity of the substrate at that portion cannot be denied. As a result, the protrusion and the protrusion receiving groove cannot be further increased. Of course, when the width of the substrate is reduced in consideration of convenience, various uses in which relative displacement and rotational displacement along the longitudinal direction are repeatedly performed. There is a possibility that the required strength of the substrate enough to withstand cannot be secured.
Therefore, this loose-leaf binding device has room for improvement in terms of the opening operation of the half ring portion by the slide opening mechanism and the strength of the substrate.

  The present invention has been made to cope with such problems of the prior art, and the object of the present invention is to effectively use the half ring portion by the slide opening mechanism without greatly reducing the strength of the substrate. It is an object of the present invention to provide a loose-leaf binding device that can realize an open operation.

  The loose-leaf binding device of the present invention includes two substrates that are arranged next to each other in parallel directions, a plurality of pairs of half-ring portions that are integrally formed on each of the substrates and extend to the surface side of the substrate, Two or more shaft connecting portions that are raised from the back surface of at least one substrate and are integrally formed on the substrate and are spaced apart from each other in the longitudinal direction of the substrate, and the longitudinal direction of the substrate on the back surface side of the substrate One or more both end fixing shafts that are integrally fixed to the shaft connecting portion, and one or more end members that are integrally provided on the other substrate and grip the both end fixing shafts. A shaft gripping portion, and relative displacements in the longitudinal direction in which the respective substrates are displaced in the opposite directions along the longitudinal direction, and around the both-ends fixed shaft that each substrate is gripped by the shaft gripping portion A plurality of pairs of half-ring portions are rotated by the pivoting displacement, and the closed positions where the respective tip portions of the half-ring portions forming a pair come close to each other to form a ring shape, and the pair of half-ring portions are arranged. Each of the tip portions is movable between open positions separated from each other, and each of the end portions of the shaft coupling portion and the shaft gripping portion adjacent to each other in the longitudinal direction is arranged in the longitudinal direction of the substrate. In accordance with relative displacement, a shaft slide opening mechanism is provided that slides in contact with each other to bring about a rotational displacement of the substrate that separates the tip portions of the paired half ring portions from each other.

Here, as the shaft portion slide opening mechanism, each of the end portions of the shaft connecting portion and the shaft gripping portion is inclined with respect to a plane orthogonal to the longitudinal direction, and the longitudinal direction of the substrate from the closed position of the half ring portion It is preferable that at least a pair of inclined guide surfaces that are in contact with each other and slide with each other are formed.
More preferably, the guide inclined surface is formed in a curved surface having a spiral shape around the both-end fixed shaft.

  In the loose-leaf binding device of the present invention, the shaft connecting portion and the shaft gripping portion provided with a pair of guide inclined surfaces are arranged at positions where the paired guide inclined surfaces are separated from each other at the closed position of the half ring portion. It is preferable to do.

  In the loose-leaf binding device according to the present invention, an elastic member that urges the two substrates toward each other only in a direction that resists relative displacement in the longitudinal direction of the substrate can be disposed on the back side of the substrate.

  In the loose-leaf binding device of the present invention, an engagement recess that is recessed from the end surface is provided on the end surface of the shaft gripping portion or the shaft connection portion, and a half ring is provided on the end surface of the shaft gripping portion or the shaft connection portion adjacent to the end surface. It is preferable to provide an engaging convex portion that fits into the engaging concave portion at a closed position of the portion and that disengages from the engaging concave portion with relative displacement in the longitudinal direction of the substrate.

In this case, the engagement convex portion that is disengaged from the engagement concave portion due to the relative displacement in the longitudinal direction of the substrate at the end face of the shaft gripping portion or the shaft coupling portion provided with the engagement concave portion is the open position of the half ring portion. It is more preferable to provide a stopper wall portion that abuts.
Preferably, the shaft gripping portion is cylindrical, and a slit is provided on the side wall of the cylindrical shaft gripping portion over the entire length in the axial direction of the shaft gripping portion, and the slit is engaged with the engagement convex portion. Let it be a recess.

In the loose-leaf binding device of the present invention, a predetermined shaft portion slide opening mechanism is provided at each end of the shaft connecting portion and the shaft gripping portion adjacent to each other in the longitudinal direction, so that both ends of the shaft are fixed to the shaft. The shaft slide opening mechanism present at a close position can rotate and displace the substrates greatly compared to a slide opening mechanism provided on the substrate such as a conventional loose-leaf binding tool.
Further, with this loose-leaf binding tool, there is no problem of reduction in the strength of the substrate due to the provision of the slide opening mechanism on the substrate.

  Therefore, according to the loose-leaf binding device of the present invention, an effective opening operation of the half ring portion by the slide opening mechanism can be realized without greatly reducing the strength of the substrate.

It is a perspective view which shows the loose leaf binding tool which concerns on one Embodiment of this invention. It is the perspective view seen from the other direction of the loose-leaf binding tool of FIG. It is the side view and rear view which show the binding tool structural member which comprises the loose-leaf binding tool of FIG. It is the partial expanded side view and perspective view which show the guide inclined surface provided in the shaft connection part of the loose-leaf binding tool of FIG. It is the partial expanded side view and perspective view which show the guide inclined surface provided in the shaft holding part of the loose-leaf binding tool of FIG. It is the partial expanded side view and perspective view which show operation | movement of the axial part slide open | release mechanism by the guide inclined surface of the loose-leaf binding tool of FIG. FIG. 7 is a partially enlarged side view and perspective view showing the operation of the shaft slide opening mechanism following FIG. 6. FIG. 8 is a partially enlarged side view and perspective view showing the operation of the shaft slide opening mechanism following FIG. 7. It is the side view and back view of the loose-leaf binding tool of FIG. It is a partial expansion perspective view which shows the modification of the hold wall part which can be provided in the loose leaf binding tool of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
The loose-leaf binding tool 1 illustrated in FIGS. 1 and 2 is similar to one substrate 2a having a substantially square cross section extending in one direction and adjacent to each other in a direction parallel to the one substrate 2a. A plurality of pairs formed on the outer surface S of each of the substrates 2a and 2b and extending substantially semicircularly from the outer surface S to the surface F side of the substrates 2a and 2b, The figure comprises eight pairs of half ring portions 3a, 3b. In the illustrated embodiment, eight pairs of half-ring portions 3a and 3b are provided, but the number of half-ring portions and the lengths of the substrates 2a and 2b can be appropriately changed according to specifications or standards.

  In this loose-leaf binding tool 1, as shown in FIG. 1, it protrudes from the back surface B of at least one of the substrates 2a and 2b and is spaced apart from each other along the longitudinal direction of the substrates 2a and 2b. Two or more substantially cylindrical shaft coupling portions 4 are provided integrally with one of the substrates 2a and 2b, and the substrate 2a is spaced from the back surface B between the shaft coupling portions 4 by a certain distance. 2b, both end fixed shafts 5 extending in parallel with each other are arranged, and each end portion of the both end fixed shafts 5 is integrally connected to each of the shaft connecting portions 4. Further, on the back surface B of the other substrate 2b, 2a, the periphery of the both-end fixed shaft 5 is arranged in the circumferential direction at an adjacent position corresponding to the arrangement position of the both-end fixed shaft 5 in the longitudinal direction of the substrates 2a, 2b. A shaft gripping portion 6 that surrounds except the portion is provided integrally with the other substrates 2b and 2a.

  Here, the two substrates 2a and 2b are connected to each other by fitting the shaft gripping portion 6 of the other substrate 2b and 2a to the both-end fixed shaft 5 of the one substrate 2a and 2b so as to surround the periphery thereof. In addition, the shaft gripping portion 6 can be relatively slidably displaced around the both-end fixed shaft 5, thereby realizing the rotational displacement of the substrates 2 a and 2 b around the both-end fixed shaft 5.

  Moreover, in this embodiment, the shaft connecting part 4 to which each end part of the both-ends fixed shaft 5 is connected by making the length of the axial direction of the shaft gripping part 6 shorter than the same length of the both-ends fixed shaft 5. The shaft gripping portion 6 can be moved along the axial direction. With this configuration, the substrates 2a and 2b can be displaced relative to each other in the opposite direction along the longitudinal direction, and the half ring portions 3a and 3b correspond to the respective distal end portions along with the relative displacement in the longitudinal direction. Are moved between an alignment position (closed position) where the substrates 2a and 2b are aligned with each other in the width direction, and an unaligned position where the tip portions are shifted from each other in the width direction.

  In order to open the half-ring portions 3a and 3b from the closed state, the user relatively displaces the substrates 2a and 2b in the longitudinal direction in the closed position of the half-ring portions 3a and 3b, thereby opening the half-ring portions 3a and 3b. After moving to the misalignment position, the half ring portions 3a and 3b can be moved to the open position by the rotational displacement of the substrates 2a and 2b around the both-end fixed shaft 5.

Note that the loose-leaf binding device 1 of the illustrated embodiment is configured by combining two binding device components 7 as shown in FIG. That is, the binding member 7 has the substrate 2a or 2b, the half ring portion 3a or 3b, the shaft connecting portion 4, the both-end fixed shaft 5 and the shaft gripping portion 6 as described above, and has the same shape. The loose-leaf binding device 1 is configured by fitting the both-end fixed shafts 5 and the shaft gripping portions 6 of the two binding device members 7.
The binding component 7 is preferably a plastic resin molded product formed by injection molding of a resin material.

  Here, in order to assist the user in rotating the substrates 2a and 2b when opening the half ring portions 3a and 3b with such a loose-leaf binding tool 1, in the present invention, shafts adjacent to each other in the longitudinal direction are provided. Shaft portions that cause rotational displacement of the substrates 2a and 2b by sliding in contact with each other at the end portions of the connecting portion 4 and the shaft gripping portion 6 in accordance with the relative displacement in the longitudinal direction of the substrates 2a and 2b. A slide opening mechanism 8 is provided. Accordingly, the user can rotate the substrates 2a and 2b by the shaft slide opening mechanism 8 only by performing an operation of relatively displacing the substrates 2a and 2b in the longitudinal direction at the closed position of the half ring portions 3a and 3b. Since the displacement occurs, the operability of the loose-leaf binding device 1 by the user is improved.

  More specifically, in this embodiment, as shown in FIG. 4, a guide inclined surface 9 that is inclined with respect to a plane orthogonal to the longitudinal direction of the substrates 2a and 2b is provided at the end of the shaft connecting portion 4, As shown in FIG. 5, a guide inclined surface 10 that is inclined with respect to a plane orthogonal to the longitudinal direction of the substrates 2a and 2b is provided at the end of the shaft gripping portion 6 adjacent to the end of the shaft connecting portion 4. Yes.

  In the illustrated loose-leaf binding tool 1, the user grips the enlarged diameter portions 2 c and 2 d provided at the end portions in the longitudinal direction of the substrates 2 a and 2 b as grips, and the half ring portions 3 a and 3 b shown in FIG. 6. When the substrates 2a and 2b are relatively displaced in the longitudinal direction from the closed position, the guide inclined surface 9 of the shaft connecting portion 4 and the guide inclined surface 10 of the shaft gripping portion 6 contact each other as shown in FIG. Thereafter, by sliding on the surfaces of each other, the direction of the longitudinal force caused by the user relatively displacing the substrates 2a and 2b in the longitudinal direction is such that the guide inclined surfaces 9 and 10 have the substrate 2a, It is converted into a direction in which 2b is rotated and displaced. Along with this, as shown in FIG. 8, the half ring portions 3a and 3b are moved to the closed position. In the closed position of the half ring portions 3a and 3b shown in FIG. 6, the guide inclined surface 9 and the guide inclined surface 10 are located apart from each other.

  In particular, here, in the cross section of the substrates 2a and 2b, the guide connecting surfaces 9 and 10 as the shaft slide opening mechanism 8 are provided on the shaft connecting portion 4 and the shaft gripping portion 6 that are extremely close to the both-end fixed shaft 5 serving as the rotation center. As a result, the substrate 2a and 2b can be displaced by a large stroke even in a small stroke in the longitudinal direction of the substrates 2a and 2b, as compared with the conventional technique in which the slide release mechanism is provided on the substrate away from the both-end fixed shaft. Thus, it is possible to realize an effective rotation operation by the shaft portion slide opening mechanism 8.

  As a result, according to the loose-leaf binding tool 1, when the user performs an operation of relatively displacing the substrates 2a and 2b in the longitudinal direction, the half-ring portions 3a and 3b are largely opened by the shaft portion slide opening mechanism 8. Therefore, the operability of the loose-leaf binding device 1 by the user when opening the half ring portions 3a and 3b can be effectively improved.

  Further, in this loose-leaf binding tool 1, since the shaft portion slide opening mechanism 8 is provided not on the substrates 2 a and 2 b but on the shaft connecting portion 4 and the shaft gripping portion 6 that constitute a part of the shaft portion, the rigidity of the substrates 2 a and 2 b is increased. There is no risk of decline.

It is preferable that the guide inclined surfaces 9 and 10 provided at the respective ends of the shaft connecting portion 4 and the shaft gripping portion 6 have a curved surface that spirals around the both-end fixed shaft 5. More specifically, in this shaft portion slide opening mechanism 8, the guide inclined surface 9 provided in the shaft connecting portion 4 is a shaft provided with the guide inclined surface 10 while turning around a part around the both-end fixed shaft 5. The guide inclined surface 10 provided on the shaft gripping portion 6 has a slightly inclined curved surface extending toward the gripping portion 6 side. 9 has a slightly convex curved surface extending toward the shaft connecting portion 4 side provided with 9.
According to this, during the relative displacement in the longitudinal direction of the substrates 2a and 2b, the concave curved surface of the guide inclined surface 9 and the convex curved surface of the guide inclined surface 10 are aligned and smoothly slid on each other surface. Therefore, the turning operation by the shaft portion slide opening mechanism 8 is performed more smoothly.

  In addition, it is not an indispensable structure of this invention to provide the guide inclined surfaces 9 and 10 which make a pair in the shaft connection part 4 and the shaft holding part 6 like the axial part slide open | release mechanism 8 mentioned above. For example, although not shown, an inclined surface that is inclined with respect to a plane orthogonal to the longitudinal direction is provided at one end of the shaft coupling portion or the shaft gripping portion, and the inclined surface is provided at the other end. A rotational displacement associated with the relative displacement of the substrate can also be realized by providing a projecting portion that slides. That is, the direction of the longitudinal force applied by the user to the adjacent end portions of the shaft connecting portion 4 and the shaft gripping portion 6 is changed according to the relative displacement in the longitudinal direction of the substrates 2a and 2b. The shape etc. which can be converted into the direction which rotates and displaces should just be formed.

  The shaft part slide opening mechanism 8 can be provided at one or more places, but in the illustrated embodiment, the shaft part slide opening mechanism 8 is provided at two places separated from the central region in the longitudinal direction of the substrates 2a and 2b. As a result, an effective pivoting operation by the respective shaft portion slide opening mechanisms 8 is performed in one half and the other half in the longitudinal direction.

In the illustrated loose-leaf binding tool 1, an elastic member 11 such as a coil spring is arranged in the central region in the longitudinal direction on the back surface B side of the substrates 2 a and 2 b, and the axial direction thereof is substantially coincident with the longitudinal direction of the substrates 2 a and 2 b. Arranged.
The elastic member 11 is disposed so as to be sandwiched between the end surface of the shaft coupling portion 4 on the one substrate 2a side and the end surface of the shaft coupling portion 4 on the other substrate 2b side, and the substrate 2a and the substrate 2b are arranged. The half ring portions 3a and 3b are biased in a direction against the relative displacement in the longitudinal direction, more specifically in a direction returning the half ring portions 3a and 3b to the alignment position (closed position).

Although not illustrated, the elastic member 11 may be a so-called torsion coil spring in which legs extending in the radial direction are provided at both ends in the axial direction of the coil-shaped main body. The movement of the ring portions 3a and 3b to the open position is also assisted by the biasing force of the leg portion of the torsion coil spring.
However, when the elastic member 11 is a torsion coil spring, there is a problem that it takes time to arrange the torsion coil spring when assembling the two binding component members 7 when the loose-leaf binding device 1 is manufactured. .

  And in this invention, since the axial part slide open | release mechanism 8 mentioned above assists the open operation of the half ring parts 3a and 3b, a torsion coil spring is not necessarily required. Therefore, the elastic member 11 is a coil spring without legs that biases the two substrates 2a and 2b only in the direction against the relative displacement in the longitudinal direction. From the viewpoint of sex.

  In the arrangement area of the elastic member 11, two pairs of hold wall portions 12 that hold the elastic member 11 on both sides of each end side in the axial direction of the elastic member 11 are provided on the back surfaces B of the substrates 2 a and 2 b. It is provided so as to protrude integrally from. The holding wall portions 12 forming a pair extend along the periphery of the elastic member 11, but are interrupted in the central region in the width direction of the substrates 2 a and 2 b, so that two binding component members are produced when the loose-leaf binding device 1 is manufactured. After combining 7, the elastic member 11 can be pushed in from the interrupted portion and disposed there, and the elastic member 11 can be easily attached. Further, after the elastic member 11 is disposed, the hold wall portion 12 prevents the elastic member 11 from unintentionally falling off. As shown in FIG. 9, the pair of hold wall portions 12 are provided at positions where the half ring portions 3 a, 3 b are slightly shifted from each other in the closed position, and the pair of hold wall portions 12 are long. By separating the ring portions 3a and 3b from each other, when the half ring portions 3a and 3b are moved to the open position, the hold wall portions 12 enter between them, so that the half ring portions 3a and 3b are enlarged. It becomes possible to open.

Or as shown in FIG. 10, it can also be set as a pair of hold wall part 12a extended continuously in a longitudinal direction over the whole axial direction of the elastic member 11. FIG. Even in the hold wall portion 12a, the elastic member 11 can be disposed on the inner side of the substrate 2a, 2b after the combination of the two binding component members 7 from the discontinuity in the central region in the width direction. The pair of hold wall portions 12a shown in FIG. 10 are limited in the opening angle of the half ring portions 3a and 3b as compared to the two pairs of hold wall portions 12 described above, but A firm connection can be realized, whereby the unintentional disassembly of the binding component 7 can be prevented.
Depending on the specifications, the elastic member 11 may not be provided, and in this case, the arrangement of the hold wall portions 12 and 12a is not necessarily required.

  By the way, in this embodiment, as shown to Fig.9 (a), it is from this end surface to the end surface of the shaft holding part 6 or the shaft connection part 4 which mutually adjoins among the shaft holding parts 6 and the shaft connection parts 4 mentioned above. A recessed engagement recess 13 is provided, and the end surface of the shaft gripping portion 6 or the shaft coupling portion 4 adjacent to the end surface thereof is fitted into the engagement recess 13 at the closed position of the half ring portions 3a and 3b, and the substrate 2a. It is preferable to provide the engaging convex part 14 which comes off the engaging concave part 13 with the relative displacement in the longitudinal direction 2b.

  In the illustrated loose-leaf binding tool 1, the both-end fixed shaft 5 is fitted into the shaft gripping portion 6, as shown in FIG. 9A, on the side wall of the shaft gripping portion 6 having a cylindrical shape such as a cylinder. Therefore, a slit 6a extending over the entire length in the axial direction parallel to the longitudinal direction of the substrates 2a and 2b is provided. In some of the shaft gripping portions 6 and the shaft coupling portion 4, the engagement convex portion 14 is engaged with the slit 6 a provided in the shaft gripping portion 6. Thus, the slit 6a can be used as the engaging recess 13.

The engagement concave portion 13 and the engagement convex portion 14 engage with each other in the closed position of the half ring portions 3a and 3b, and function as locking means for preventing the half ring portions 3a and 3b from opening.
On the other hand, when the user relatively displaces the substrates 2a and 2b along the longitudinal direction in order to open the half ring portions 3a and 3b, the engaging convex portion 14 is released from the engaging concave portion 13 and is locked. Then, based on the function of the shaft portion slide opening mechanism 8 described above, the engagement convex portion 14 is engaged as the substrates 2a and 2b are rotationally displaced in the opening direction of the half ring portions 3a and 3b. It slides on the end face of the shaft gripping part 6 or the shaft coupling part 4 provided with the joint recess 13.

Thereafter, in this embodiment, the engagement convex portion 14 abuts against a stopper wall portion 15 provided to protrude from the shaft gripping portion 6 or the shaft coupling portion 4 at the open position of the half ring portions 3a and 3b (see FIG. 3 (a)). Accordingly, when the half ring portions 3a and 3b reach the open position where the predetermined opening angle is reached, the half ring portions 3a and 3b are further opened by the contact between the engagement convex portion 14 and the stopper wall portion 15. Can be prevented.
Here, the stopper wall portion 15 is formed on the side surface of the engaging convex portion 14 that enters the engaging concave portion 13 at the closed position of the half ring portions 3a, 3b. That is, in this embodiment, the engaging convex portions 14 formed on the shaft gripping portion 6 and the shaft coupling portion 4 adjacent to each other are mutually connected at the open positions of the half ring portions 3a and 3b having a predetermined opening angle. It also functions as a stopper wall 15 that abuts and prevents further opening of the half ring portions 3a, 3b.

In the loose-leaf binding device 1 described above, half of the half-ring portions 3a and 3b in the width direction are removed so that the tip portions of the half-ring portions 3a and 3b are gradually tapered toward the tip side. In the case of a pair with it, the opposite half is removed in the same wedge shape. Further, here, a receiving plate is provided inside the side surface of the wedge-shaped tip portion on the side from which half is removed, and is aligned with a tip recess provided on the back side of the tip portion of the pair.
The tip portions of the half ring portions 3a and 3b having such a shape are aligned to form a ring shape without mutual catching in the closed position.

DESCRIPTION OF SYMBOLS 1 Loose leaf binding tool 2a, 2b Substrate 2c, 2d Expanded diameter part 3a, 3b Half ring part 4 Shaft coupling part 5 Both ends fixed shaft 6 Shaft holding part 6a Slit 7 Binding component member 8 Shaft part slide opening mechanism 9, 10 Guide inclination Surface 11 Elastic member 12, 12a Hold wall portion 13 Engagement recess 14 Engagement projection 15 Stopper wall portion F surface B back surface S outer side surface

Claims (8)

Two substrates arranged side by side in parallel to each other, a plurality of pairs of half-ring portions integrally formed on each of the substrates and extending to the front surface side of the substrate, and raised from the back surface of at least one of the substrates And two or more shaft connecting portions formed integrally with the substrate and spaced apart from each other in the longitudinal direction of the substrate, and extending along the longitudinal direction of the substrate on the back side of the substrate, Each of which has one or more fixed shafts fixed to the shaft connecting portion integrally and one or more shaft gripping portions integrally provided on the other substrate and gripping the fixed shafts. ,
A plurality of pairs of halves are caused by the relative displacement in the longitudinal direction in which the respective substrates are shifted in the opposite directions along the longitudinal direction, and the rotational displacement in which each substrate is rotated around the both-end fixed shaft gripped by the shaft gripping portion. The ring portion is divided into a closed position in which the tips of the pair of half ring portions are adjacent to each other to form a ring shape, and an open position in which the tips of the pair of half ring portions are spaced apart from each other. A loose-leaf binding that can be moved between
The tip of the half ring part which makes a pair by sliding in contact with each other with the relative displacement in the longitudinal direction of the substrate to the respective ends of the shaft coupling part and the shaft gripping part adjacent to each other in the longitudinal direction A loose-leaf binding device provided with a shaft slide opening mechanism that causes rotational displacement of a substrate that separates parts from each other.   As the shaft slide release mechanism, relative to the longitudinal direction of the substrate from the closed position of the half ring portion, the shaft connecting portion and the end portion of the shaft gripping portion are inclined with respect to a plane perpendicular to the longitudinal direction. The loose-leaf binding device according to claim 1, wherein at least a pair of guide inclined surfaces that are in contact with each other and slide are formed.   The loose-leaf binding device according to claim 2, wherein the inclined guide surface is formed in a curved surface having a spiral shape around the both-end fixed shaft.   The shaft connecting portion and the shaft gripping portion provided with a pair of guide inclined surfaces are arranged at positions where the paired guide inclined surfaces are separated from each other in the closed position of the half ring portion. Loose leaf binding tool.   The elastic member which urges | biases the mutual of two board | substrates only to the direction which resists the relative displacement of the longitudinal direction of the said board | substrate is arrange | positioned on the back surface side of the said board | substrate. The loose-leaf binding tool described.   An engagement recess that is recessed from the end surface is provided on the end surface of the shaft gripping portion or the shaft coupling portion, and the end surface of the shaft gripping portion or the shaft coupling portion adjacent to the end surface is provided with the engagement recess in the closed position of the half ring portion. The loose-leaf binding tool as described in any one of Claims 1-5 which provides the engagement convex part which remove | deviates from the said engagement recessed part with fitting with the relative displacement of the longitudinal direction of a board | substrate.   A stopper in which an engagement convex portion, which is disengaged from the engagement concave portion due to relative displacement in the longitudinal direction of the substrate, abuts the end surface of the shaft gripping portion or the shaft coupling portion provided with the engagement concave portion at the open position of the half ring portion. The loose-leaf binding tool according to claim 6, wherein a wall portion is provided.   The shaft gripping portion has a cylindrical shape, and a slit is provided on the side wall of the cylindrical shaft gripping portion over the entire length in the axial direction of the shaft gripping portion, and the slit serves as an engagement concave portion into which the engagement convex portion is fitted. Item 8. A loose-leaf binding device according to item 6 or 7.

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