JP5792405B1 - Loose leaf binding - Google Patents

Abstract

[PROBLEMS] To assist the operation of the rotational displacement of the substrate after the operation of the relative displacement of the substrate by the user without lowering the manufacturing efficiency of the loose leaf binding device, thereby improving the operability of the loose leaf binding device. A loose-leaf binding device that can be improved is provided. A pair of half-rings are formed by sliding in contact with each other in accordance with relative displacement along the extending direction of the substrates 2a and 2b, respectively, at adjacent portions of the two substrates 2a and 2b. A slide opening mechanism 6 is provided that causes rotational displacement of the substrates 2a and 2b that separate the tip portions 4a and 4b of the portions 3a and 3b from each other. [Selection] Figure 1

Description

  The present invention provides a closed position in which a plurality of pairs of half-ring portions formed on each substrate are close to each other to form a ring shape by relative rotational displacement of two substrates parallel to each other. And a loose-leaf binding device that is configured to be movable between open positions where the respective tip portions are separated from each other, and in particular, a technique that can improve the operability of the loose-leaf binding device by a user This is a proposal.

As this type of loose-leaf binding tool, the applicant previously proposed in Japanese Patent Application No. 2014-080587 that a shaft that enables rotational displacement of two substrates is formed integrally with the substrate.
More specifically, as shown in FIGS. 18 (a) and 18 (b), the loose-leaf binding device 101 includes two substrates 102a and 102b that are arranged next to each other in parallel directions, and the substrates 102a and 102b. A plurality of pairs of half-ring portions 103a and 103b formed on each of the first and second substrates 102a and 102b, and one or more fixed shafts 104 formed integrally with the back surface B of at least one of the substrates 102a and 102b and extending in parallel with the substrates 102a and 102b. The other substrates 102b and 102a are formed integrally with the back surface B and include one or more shaft grips 105 surrounding the periphery of the both-end fixed shaft 104.

According to the loose-leaf binding device 101, the two substrates 102a and 102b can be rotationally displaced around the both-end fixed shaft 104 gripped by the shaft gripping portion 105.
This eliminates the need for a separate metal shaft member that has been used as a shaft in the past, and can reduce the number of members, greatly increasing the efficiency of assembly work during manufacturing and reducing manufacturing costs. Can do.

In using the illustrated loose-leaf binding device 101, the user holds the grip portions 107a and 107b provided at the ends of the substrates 102a and 102b, and arranges them on the back surface B side of the substrates 102a and 102b. The plate lock means 109 is unlocked by relatively displacing the two substrates 102a, 102b with respect to each other along the extending direction against the biasing force of the coil spring 108.
In this state, the half ring portions 103a and 103b can be moved to the open position by rotationally displacing the substrates 102a and 102b in the direction to open the half ring portions 103a and 103b.

  By the way, in the loose-leaf binding device 101 as described above, the half ring portions 103a and 103b cannot be opened only by an operation of relatively displacing the substrates 102a and 102b along the extending direction. After the relative displacement operation, it is necessary to perform a further operation of rotationally displacing the substrates 102a and 102b toward the open positions of the half ring portions 103a and 103b. Therefore, the operability of the loose-leaf binding device 101 is required. From this point of view, there was room for improvement.

For this, as the coil spring 108, as shown in FIG. 19, each of the winding start end and winding end of the coil main body 109 is extended outward in the radial direction from the coil outer periphery, and the leg portion 110 is extended. It is also possible to cope with this by using a so-called torsion coil spring 111 provided with.
In the case where the torsion coil spring 111 is used, the base plates 102a and 102b are biased so as to be rotationally displaced in the direction in which the half ring portions 103a and 103b are opened by both the leg portions 110, so After unlocking the plate locking means 109 due to the displacement, the urging force of the leg portion 110 causes rotational displacement of the substrates 102a and 102b, so that the half ring portions 103a and 103b are automatically moved to the open position. Thus, in this case, the user does not need to perform the rotational displacement operation of the substrates 102a and 102b.

  However, when such a torsion coil spring 111 is used, when the loose-leaf binding device 101 is manufactured, when the two substrates 102a and 102b are assembled, the torsion coil spring 111 is made to resist the urging force so that the legs 110 are predetermined. An arrangement work is required so as to fit in the position, and this causes a problem that the production efficiency particularly in mass production is greatly reduced.

  An object of the present invention is to solve such problems of loose-leaf binding tools. The object of the present invention is to provide a substrate by a user without reducing the manufacturing efficiency of loose-leaf binding tools. An object of the present invention is to provide a loose-leaf binding device that assists in the operation of rotational displacement of the substrate after the relative displacement operation, thereby improving the operability of the loose-leaf binding device.

The loose-leaf binding device of the present invention includes two substrates that are arranged next to each other in parallel directions, and a plurality of substrates that are formed on each of the substrates and that extend to the surface side of the substrates to form a ring shape together with each other. A pair of half-ring portions, and a plurality of pairs of half-ring portions are closed by rotating the respective substrates so that the tips of the pair of half-ring portions are close to each other to form a ring shape. The position of each of the half ring portions that form a pair is movable between an open position where they are separated from each other, and the substrate protrudes from the back surface of at least one of the substrates, and the substrate Two or more shaft connecting portions arranged apart from each other along the extending direction of the two, and each end extending in parallel with the substrate at a distance from the back surface between the two or more shaft connecting portions. Department is One or more both end fixing shafts fixed to each of the foot connecting portions are integrally provided, and the back surface of the other substrate is adjacent to the both end fixing shafts on the back surface of the other substrate. Is integrally provided with one or more shaft gripping portions that surround the shaft except for a part in the circumferential direction of the both-end fixed shaft, and the two substrates are rotated around the both-end fixed shaft gripped by the shaft gripping portion. It is possible to displace the tip of the half ring part that makes a pair by sliding in contact with each other along with the relative displacement along the extending direction of the substrate at each of the adjacent portions of the two substrates. A slide opening mechanism is provided that causes rotational displacement of the substrates separated from each other.

In the loose-leaf binding device of the present invention, each of the adjacent portions of the two substrates is inclined with respect to the extending direction of the substrate in a front view of the substrate, and is relatively displaced along the extending direction of the substrate. Accordingly, it is preferable that at least a pair of guide inclined surfaces that slide in contact with each other is provided, and the slide opening mechanism is configured by the guide inclined surfaces.
Here, each of the adjacent surfaces of the two substrates is provided with a protrusion protruding from the adjacent surface, and a protrusion receiving groove that is continuous with the protrusion and is recessed from the adjacent surface. More preferably, the guide inclined surface is disposed over the protrusion receiving groove.

Preferably, an elastic member that urges the two substrates toward each other only in a direction resisting relative displacement along the extending direction of the substrate is disposed on the back side of the substrate.
As used herein, “an elastic member that urges the two substrates toward each other only in a direction against the relative displacement along the extending direction of the substrate” refers to a relative displacement along the extending direction of the substrate. It means that a torsion coil spring or the like having a leg portion that urges the half ring portion in the opening direction in addition to the direction is not included.

Its to here, the end face of the shaft gripping portion or shaft connecting portion is provided with engaging recess which is recessed from the end face, the end face of the shaft gripping portion or shaft connecting portion adjacent to the end face, of the semi-ring portion It is preferable to provide an engaging convex portion that fits into the engaging concave portion at the closed position and that is disengaged from the engaging concave portion with relative displacement along the extending direction of the substrate.

In the case of providing the engaging convex portion and the engaging concave portion, the shaft gripping portion is formed in 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. Can be an engaging recess into which the engaging protrusion fits.
Further, in this case, an engagement convex portion that is disengaged from the engagement concave portion due to relative displacement along the extending direction of the substrate is formed on the end surface of the shaft gripping portion or the shaft coupling portion provided with the engagement concave portion. It is preferable to provide a stopper surface that abuts at the open position.

And preferably, an engaging convex portion that is disengaged from the engaging concave portion due to relative displacement along the extending direction of the substrate is provided on an end surface of the shaft gripping portion or the shaft coupling portion provided with the engaging concave portion. A convex slide region that abuts and slides upon rotation displacement is provided so as to protrude from the end surface, and the convex slide region is provided between the engagement convex portion and the end surface due to the rotational displacement of the substrate. Increase frictional resistance.
Also, here, two sets of engaging convex portions and engaging concave portions are provided on each end face of the shaft gripping portion or the shaft connecting portion adjacent to each other, and these engaging convex portions are arranged at the open position of the half ring portion. It is preferable to contact each other.

  According to the loose-leaf binding device of the present invention, the half-ring portions that make a pair by sliding in contact with each other along the extending direction of the substrate to each of adjacent portions of the two substrates. Direction in which the half ring portion is opened by the user performing an operation of relatively displacing the substrate along the extending direction by providing a slide opening mechanism that causes the rotational displacement of the substrate to separate the tip portions of the substrate from each other. Since the rotational displacement of the substrate occurs, the operability of the loose-leaf binding tool can be improved.

It is a front view which shows the loose leaf binding tool which concerns on one Embodiment of this invention. It is the front view and side view which show the plate member which comprises the loose leaf binding tool of FIG. It is a partial expansion perspective view which shows the slide open | release mechanism provided in the loose leaf binding tool of FIG. It is a front view which shows the loose-leaf binding tool of FIG. 1 in each state of the operation | movement based on the relative displacement of a board | substrate. It is a front view of the elastic member which can be arrange | positioned at the loose leaf binding tool of FIG. It is a perspective view of the loose-leaf binding tool of FIG. It is a side view of the loose-leaf binding tool of FIG. FIG. 3 is a rear view of the plate member of FIG. 2 and a partially enlarged view thereof. It is a partial expanded side view of the loose-leaf binding tool of FIG. It is the elements on larger scale of the plate member which shows the convex part slide area | region which the loose-leaf binding tool of FIG. 1 has. It is a partial expansion perspective view of the loose-leaf binding tool which shows the convex part slide area | region of FIG. 10 in each position at the time of the rotation displacement of a board | substrate. It is sectional drawing which follows the XII-XII line | wire of FIG. 1 which shows the loose-leaf binding tool of FIG. 1 in the state which opened the half ring part to the open position. It is a side view which shows the loose-leaf binding tool of FIG. 1 in the state which the half ring part opened. It is the elements on larger scale of each plate member which shows the locking means with an opening maintenance mechanism provided in the loose-leaf binding tool of FIG. It is the elements on larger scale of each plate member which shows the locking means with an opening restriction mechanism provided in the loose-leaf binding tool of FIG. It is sectional drawing which follows the XVI-XVI line of FIG. It is a partial expansion perspective view which shows the arrangement | positioning location of the elastic member of the loose leaf binding tool of FIG. 1 in the state which removed the elastic member. It is the front view and side view which show the conventional loose leaf binding tool. It is the front view and top view of a torsion coil spring which can be used for the loose-leaf binding tool shown in FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
A loose-leaf binding tool 1 illustrated in FIG. 1 includes one substrate 2a having a substantially rectangular cross-section extending in one direction, the other substrate 2b disposed adjacent to each other in a direction parallel to the one substrate 2a, and the like. A plurality of pairs formed in the outer surface S1 of each of the substrates 2a and 2b and extending substantially semicircularly from the outer surface S1 toward the surface F of the substrates 2a and 2b, eight pairs of half ring portions 3a in the figure. 3b.
Preferably, the substrates 2a and 2b and the half ring portions 3a and 3b are made of plastic made of a resin material.

Here, the half ring portions 3a and 3b that are inserted into each of a plurality of through holes provided in a paper such as a loose leaf (not shown) and function to moor the paper, the substrates 2a and 2b on which they are formed, A closed position in which the tip portions 4a and 4b come close to each other to form a ring shape as shown in FIG. The tip portions 4a and 4b are configured to be movable between open positions where they are separated from each other.
Thus, the paper can be attached and detached at the open position of the half ring portions 3a and 3b, and the paper can be bound and held at the closed position of the half ring portions 3a and 3b.

  In order for the user to operate the loose-leaf binding device 1 described above, the user first releases the lock of the locking means for restraining the half ring portions 3a and 3b in the closed position as described later. While gripping the knob portions 5a and 5b provided at the ends of 2a and 2b, the one substrate 2a and the other substrate 2b are relatively displaced along the extending direction (the left-right direction in FIG. 1).

  Then, conventionally, for example, it is necessary to rotate and displace the substrate so as to move the half ring part to the open position, for example, by grasping each of the paired half ring parts while holding the knob part. However, in the present invention, in order to assist the operation of the rotational displacement of the substrate, relative displacement along the extending direction of the substrates 2a and 2b is made in each of the adjacent portions of the substrates 2a and 2b. Accordingly, a slide opening mechanism 6 is provided that slides in contact with each other to cause rotational displacement of the substrates 2a and 2b that separate the tip portions 4a and 4b of the paired half ring portions 3a and 3b from each other.

The slide opening mechanism 6 will be described in detail. In this embodiment, as shown in FIG. 2, one plate member 7b of the two plate members 7a and 7b constituting the loose-leaf binding device 1 is shown in FIG. As shown in an enlarged view of the slide opening mechanism 6, on the inner surface S2 that is the adjacent surface of the two substrates 2a and 2b, the protrusion 8 that protrudes from the inner surface S2, and the protrusion 8 By providing the protrusion receiving groove portions 9 continuously recessed from the inner side surface S2, it is necessary for the extending direction of the substrates 2a and 2b from the protrusions 8 to the protrusion receiving groove portions 9 in the front view of the substrates 2a and 2b. A guide inclined surface 10 that is inclined at an angle of is formed to constitute the slide opening mechanism 6.
Here, similar projections 8 and projection receiving grooves 9 and guide inclined surfaces 10 are formed on the other plate member 7a.

In the loose-leaf binding device 1 provided with the slide opening mechanism 6 described above, when the user relatively displaces the two substrates 2a and 2b along the extending direction as shown in FIG. The protrusions 8 provided on one of the substrates 2a and 2b slide in the protrusion receiving groove 9 provided on the other substrates 2b and 2a toward the guide inclined surface 10 as indicated by arrows in the figure.
Next, when the user further displaces the two substrates 2a and 2b, the guide inclined surfaces 10 of the one substrate 2a and 2b and the other substrate 2b and 2a come into contact with each other. The direction of the force in the extending direction of the substrates 2a and 2b by the person is converted to the direction in which the substrates 2a and 2b are rotationally displaced on the guide inclined surfaces 10 as indicated by white arrows in FIG. Is done.
As a result, as the guide inclined surfaces 10 that come into contact with each other slide, the protrusions 8 provided on the respective substrates 2a and 2b ride on each other, and as shown in FIG. The substrates 2a and 2b are rotationally displaced in the opening direction of 3b.

  Therefore, according to this loose-leaf binding tool 1, the user only performs an operation of relatively displacing the substrates 2a and 2b along the extending direction, and the half ring portion 3a based on the rotational displacement of the substrates 2a and 2b. Since at least the initial opening operation of 3b can be brought about, the operability of the loose-leaf binding device 1 by the user when the half ring portions 3a and 3b are opened can be greatly improved.

In addition, as described above, by using a torsion coil spring and placing both of its legs between two substrates, it is possible to realize automatic rotational displacement of the substrate, Such an arrangement of the torsion coil spring reduces the workability of assembling the two plate members when manufacturing the loose-leaf binding device, and therefore may not be particularly suitable for mass production of the loose-leaf binding device. .
On the other hand, in the loose-leaf binding device 1 according to the embodiment of the present invention, like a normal coil spring as shown in FIG. 5, the two substrates 2a and 2b resist each other against relative displacement along the extending direction. Even when the elastic member RM that urges only in the direction to be disposed is disposed on the back surface B side of the substrates 2a and 2b, as shown in FIG. 6, by the operation of the relative displacement of the substrates 2a and 2b by the user, Based on the function of the slide opening mechanism 6 described above, it becomes possible to cause the rotational displacement of the substrates 2a and 2b in the direction in which the half ring portions 3a and 3b open, so that it becomes unnecessary to use a torsion coil spring. This is also advantageous from the viewpoint of manufacturing efficiency.

  In addition, it is not an indispensable structure of this invention to provide the guide inclined surface 10 which makes a pair in each of board | substrate 2a, 2b like said slide open | release mechanism 6. FIG. For example, although not shown in the drawings, the substrate can also be obtained by providing one substrate with an inclined surface inclined with respect to the extending direction and providing the other substrate with a protruding portion that slides on the inclined surface. The rotational displacement associated with the relative displacement can be realized. In other words, if a shape or the like that can convert the direction of the force in the extending direction applied by the user into the direction in which the half-ring portion is rotationally displaced is formed at a location adjacent to each other of the two substrates. Good.

By the way, in the loose-leaf binding device 1 of this embodiment, as can be seen from FIG. 6, the rotational displacement of the substrates 2a and 2b that causes the half-ring portions 3a and 3b to move between the open position and the closed position. In order to achieve the above, two or more cylindrical shapes or the like that protrude from the back surface B of the at least one substrate 2a, 2b and are spaced apart from each other along the extending direction of the substrates 2a, 2b, etc. The shaft connecting portion 11 is provided integrally with one of the substrates 2a and 2b, and a both-end fixed shaft 12 extending in parallel with the substrates 2a and 2b is provided between the shaft connecting portions 11 with a certain distance from the back surface B. The end portions of the both-end fixed shaft 12 are integrally connected to the shaft connecting portions 11 respectively. Further, on the back surface B of the other substrate 2b, 2a, the periphery of the both-end fixed shaft 12 is arranged in the adjacent position corresponding to the arrangement position of the both-end fixed shaft 12 in the extending direction of the substrates 2a, 2b. A shaft gripping portion 13 that surrounds except for a part of the direction 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 13 of the other substrate 2b and 2a to the both-end fixing shaft 12 of the one substrate 2a and 2b so as to surround the periphery thereof. At the same time, the shaft gripping portion 13 can be relatively slidably displaced around the both-end fixed shaft 12, whereby the substrates 2 a and 2 b can be rotationally displaced around the both-end fixed shaft 12.

  According to this configuration, the both ends fixing shaft 12 and the shaft gripping portion 13 integrally formed on each of the substrates 2a and 2b allow the substrates 2a and 2b to be rotated and displaced, so that a shaft member made of metal or the like is separately provided. As a result, an improvement in manufacturing efficiency and a reduction in material cost due to the reduction in the number of members can be realized.

  In this embodiment, each of the substrates 2a and 2b is provided with one or more both-end fixed shafts 12 and two or more shaft connecting portions 11 on one side separated from the central region in the extending direction. One or more shaft gripping portions 13 are provided on the other side in the extending direction. Further, here, the number of the fixed shafts 12 and the shaft gripping portions 13 that are located across the central region in the extending direction is set to be equal to each other (for example, three to three), and one plate The member 7a and the other plate member 7b have the same shape.

  Moreover, in this loose-leaf binding tool 1, the shaft gripping portion 13 is formed in a cylindrical shape such as a cylinder, for example, and the side wall of the cylindrical shaft gripping portion 13 is provided with a substrate as shown in FIGS. A slit 13a extending over the entire length in the axial direction parallel to the extending direction of 2a and 2b is provided. The slits 13 a allow the both-end fixed shaft 12 to be fitted into the shaft gripping portion 13.

Here, in the present invention, as shown in FIGS. 6 and 7, the shaft gripping portion 13 and the shaft coupling portion 11 described above are recessed from the end surface of the shaft gripping portion 13 or the shaft coupling portion 11 adjacent to each other. Engaging recesses 14 are fitted into the engaging recesses 14 at the closed positions of the half ring portions 3a and 3b on the end faces of the shaft gripping part 13 or the shaft coupling part 11 adjacent to the end faces thereof, and the substrate 2a, It is preferable to provide the engaging convex part 15 which comes off from the engaging concave part 14 with the relative displacement along the extending direction of 2b.
6 and 7, a part of the shaft gripping portion 13 and the shaft coupling portion 11 are engaged with the engagement convex portion 15 in the slit 13a provided in the shaft gripping portion 13, and this slit It is also possible to use 13a as the engaging recess 14.

The engaging concave portion 14 and the engaging convex portion 15 engage with each other in the closed position of the half ring portions 3a and 3b, and function as locking means for restraining the half ring portions 3a and 3b in the closed position.
On the other hand, when the user relatively displaces the substrates 2a and 2b along the extending direction in order to open the half ring portions 3a and 3b, the engaging convex portion 15 is released from the engaging concave portion 14 and locked. Then, based on the function of the slide opening mechanism 6 described above, the engagement protrusion 15 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 surface of the shaft gripping portion 13 or the shaft coupling portion 11 provided with the recess 14 under the action of a predetermined frictional force.

  At this time, the frictional resistance between the end face of the shaft gripping portion 13 or the shaft coupling portion 11 and the engagement convex portion 15 sliding there is increased, and the half ring portions 3a and 3b are opened until reaching the open position. In order to adjust the condition, as shown in the rear view of one plate member 7b in FIG. 8, the extension of the substrates 2a and 2b on the end face of the shaft gripping portion 13 or the shaft connecting portion 11 provided with the engaging recess 14 Protruding slide region 16 is provided so as to protrude from the end face, where engaging convex portion 15 that is disengaged from engaging concave portion 14 due to relative displacement along the direction contacts and slides when substrate 2a, 2b rotates. Is preferred.

In this embodiment, as shown in FIG. 9 and FIG. 10 in an enlarged manner, the above-described convex slide region 16 is formed on the end face of the shaft gripping portion 13 between the slit 13a and the substrates 2a and 2b that also function as engaging concave portions. A projecting surface 16a formed by gradually decreasing the projecting height from the rear surface B of the substrates 2a and 2b toward the slit 13a side is provided in a projecting position between the rear surface B and the rear surface B. Forming. Furthermore, the side surface adjacent to the slide surface 16a of the convex part slide area | region 16 is set as the stopper surface 16b here.
In addition, this convex part slide area | region 16 is integrally formed in the end surface of the shaft holding part 13, and the back surface B of board | substrate 2a, 2b.

  According to the loose-leaf binding device 1 provided with such a convex part slide region 16, as described above, after the lock by the engaging concave part 14 and the engaging convex part 15 is released, the rotational displacement of the substrates 2a and 2b is caused. Accordingly, as shown in FIG. 11A, in the shaft gripping portion 13 provided with the convex slide region 16, the engaging convex portion 15 on the end surface of the adjacent shaft connecting portion 11 is slid on the convex slide region 16. It rides on the surface 16a and slides on the slide surface 16a under the action of the urging force by the elastic member RM.

  And when the engagement convex part 15 exceeds the slide surface 16a of the convex part slide area | region 16, based on the urging | biasing force of the extending direction by the elastic member RM, the engagement convex part 15 is shown in FIG.11 (b). As described above, it falls to the point beyond the convex slide area 16 and comes into contact with the stopper surface 16 b of the convex slide area 16. Thereby, when the half ring portions 3a and 3b reach the open position where the predetermined opening angle θ is reached, as shown in FIG. 12, the engagement convex portion 15 and the stopper surface 16b of the convex slide region 16 are Since the contact prevents the rotational displacement of the substrates 2a and 2b in the direction returning to the closed position of the half ring portions 3a and 3b, the opening angle θ of the half ring portions 3a and 3b is maintained. In addition, by lowering the protruding height of the convex slide region 16 from the end face of the shaft gripping portion 13, the user slightly applies a force in the direction in which the half ring portions 3a and 3b are closed, thereby causing the engagement convexity. The part 15 can get over the convex part slide area | region 16, and can move the half ring parts 3a and 3b to a closed position. FIG. 13 is a side view showing a state where the half ring portions 3a and 3b of the loose-leaf binding device 1 are opened.

  Such engagement concave portion 14 (slit 13a), engagement convex portion 15 and convex portion slide region 16 are formed in the half ring portions 3a, 3b without relative displacement of the substrates 2a, 2b in the closed position of the half ring portions 3a, 3b. While the opening of the half ring portions 3a and 3b is prevented, the half ring portions 3a and 3b are prevented from closing unintentionally and the half ring portions 3a and 3b are kept open. The lock means Lc with an opening maintaining mechanism that functions as much as possible is configured. FIGS. 14A and 14B show the engagement concave portion 14 (slit 13a), the engagement convex portion 15, and the convex slide region 16 constituting the lock means Lc with the opening maintaining mechanism, as shown in FIGS. 14A and 14B. Shown in the figure.

  As other locking means, it is composed of only one engagement concave portion 14 provided on one of the substrates 2a and 2b and one engagement convex portion 15 provided on the other substrate 2b and 2a. With the usual locking means having only the function of preventing the half-ring portions 3a and 3b from opening at the closed position of 3b, and the opening prevention function of the half-ring portions 3a and 3b at the closed position of the half-ring portions 3a and 3b Also, it is possible to provide a lock means Lo with an opening restricting mechanism to which a function of preventing the half ring portions 3a and 3b from opening beyond a predetermined opening angle θ at the opening position.

  Among these, as shown in FIG. 15, the locking means Lo with the opening restricting mechanism includes, for example, two sets of engaging projections provided on the shaft gripping portion 13 and the shaft coupling portion 11 adjacent to each other of the two substrates 2a and 2b. A portion 15 and an engaging recess 14 can be formed. More specifically, as shown in FIG. 15, an engagement concave portion 14 as a slit 13 a is provided in the shaft gripping portion 13 of one substrate 2 a, and the engagement convex portion 15 is provided on the end surface of the shaft gripping portion 13. The slits 13a are provided at intervals in the circumferential direction. In addition, the shaft connecting portion 11 of the other substrate 2b includes an engagement recess 14 corresponding to the engagement protrusion 15 on the one substrate 2a side, and an engagement protrusion corresponding to the slit 13a on the one substrate 2a side. 15 is provided.

  According to the locking means Lo with the opening restriction mechanism, the two substrates 2a and 2b are relatively displaced along the extending direction thereof, thereby locking each of the two sets of the engaging convex portion 15 and the engaging concave portion 14. Is released, and then, when the half ring portions 3a and 3b are opened to the open position of the predetermined opening angle θ, the engaging convex portions 15 of the two sets of engaging convex portions 15 and engaging concave portions 14 are respectively. However, by abutting each other as shown in a sectional view in FIG. 16, it is possible to prevent the half-ring portions 3a and 3b from opening beyond the opening angle θ, and the half-ring portions 3a and 3b can be further opened. Opening will be limited.

In this locking means Lo with the opening restricting mechanism, as shown in FIG. 15 (a), the engaging convex portion 15 is connected to the engaging convex portion 15 provided on the shaft connecting portion 11 on the other substrate 2b side. As shown in FIG. 15 (b), a convex portion extending portion 15a extending toward the substrate 2a side is formed, and a slit 13a of the shaft gripping portion 13 of one substrate 2a is formed on the substrate 2a side portion. A receiving space 13b into which the above-described protruding portion extension portion 15a enters when the half ring portions 3a and 3b are closed is formed to be recessed toward the substrate 2a.
The protrusion extension 15a and the receiving space 13b are engaged with each other when the half ring portions 3a and 3b are closed, and the substrates 2a and 2b are unintentionally separated from each other when the half ring portions 3a and 3b are closed. Is more reliably prevented. When the substrates 2a and 2b are relatively displaced in the extending direction, the projecting portion extension portion 15a is displaced along the extending direction of the substrates 2a and 2b, and is disengaged from the receiving space 13b. Canceled.

  Note that one or more of the normal locking means, the locking means Lc with the opening maintaining mechanism, and the locking means Lo with the opening restricting mechanism described above can be selectively provided, and two or more of each locking means are provided. You can also.

As described above, in the loose-leaf binding tool 1 described above, a normal coil spring can be used as the elastic member RM instead of the torsion coil spring. However, such a normal coil spring is a loose-leaf binding tool. 1 can be arranged at the location shown in FIG.
That is, as shown in FIG. 17, each of the two shaft coupling portions 11 adjacent to the central region in the extending direction of the substrates 2 a and 2 b has gradually decreasing diameters with the end surfaces facing each other toward the tip side. The tapered spring receiving portion 17 is formed. The coil spring can be arranged by fitting the end of the coil spring into the tapered convex spring receiving portion.

  In addition, regardless of whether or not the above-described tapered convex spring receiving portion 17 is adopted, coil springs are sandwiched from both radial sides as shown in FIG. 17 on the outer surfaces S1 of the substrates 2a and 2b. A support wall 18 can be provided, thereby preventing unintentional detachment of the coil spring.

DESCRIPTION OF SYMBOLS 1 Loose leaf binding tool 2a, 2b Substrate 3a, 3b Half ring part 4a, 4b Tip part 5a, 5b Knob part 6 Slide release mechanism 7a, 7b Plate member 8 Protrusion part 9 Protrusion receiving groove part 10 Guide inclined surface 11 Shaft connection part 12 Both ends Fixed shaft 13 Shaft gripping part 13a Slit (engagement recess)
13b Receiving space 14 Engaging recess 15 Engaging projection 15a Protruding extension 16 Protruding slide area 16a Sliding surface 16b Stopper surface 17 Taper convex spring receiving portion 18 Support wall Lc Locking means with opening maintaining mechanism Lo Opening restriction Locking means with mechanism RM Elastic member θ Opening angle F Front surface B Rear surface S1 Outer surface S2 Inner surface (adjacent surface)

Claims (9)

Two substrates arranged next to each other in parallel to each other, and a plurality of pairs of half-ring portions formed on each of the substrates, extending to the surface side of the substrates and jointly forming a ring shape A plurality of pairs of half-ring portions can be separated from each other by a rotational displacement of each substrate, and a pair of the half-ring portions are paired with a closed position where the respective tip portions of the half-ring portions are adjacent to each other to form a ring shape. A loose-leaf binding device that is movable between an open position in which each tip portion of the ring portion is separated from each other,
Two or more shaft connecting portions that protrude from the back surface of at least one substrate and are spaced apart from each other along the extending direction of the substrate, and between the two or more shaft connecting portions Provided integrally with one or more both-end fixed shafts extending in parallel with the substrate at intervals from the back surface, each end being fixed to each of the shaft coupling parts,
One or more shaft gripping portions that surround the periphery of the both-end fixed shaft at a position adjacent to the both-end fixed shaft of the one substrate on the back surface of the other substrate, except for a part in the circumferential direction of the both-end fixed shaft. Is provided as a unit,
The two substrates can be rotated and displaced around the both-end fixed shaft gripped by the shaft gripping part,
Substrates that separate the tip portions of the pair of half-ring portions from each other by sliding in contact with each other along the extending direction of the substrate at each of adjacent positions of the two substrates. A loose-leaf binding device provided with a slide opening mechanism that provides rotational displacement of   Each of the adjacent positions of the two substrates is inclined with respect to the extending direction of the substrate in a front view of the substrates and slides in contact with each other with relative displacement along the extending direction of the substrate. The loose-leaf binding device according to claim 1, wherein at least a pair of inclined guide surfaces are provided, and the slide opening mechanism is configured by the guide inclined surfaces.   Each of adjacent surfaces of the two substrates is provided with a protrusion protruding from the adjacent surface, and a protrusion receiving groove that is recessed from the adjacent surface continuously to the protrusion, and the protrusion receiving groove from the protrusion. The loose-leaf binding tool according to claim 2, wherein the inclined guide surface is disposed.   The elastic member which urges | biases the mutual of two board | substrates only to the direction which resists the relative displacement along the extension direction of the said board | substrate is arrange | positioned on the back surface side of the said board | substrate. The loose-leaf binding tool as described in the item. An engagement recess recessed from the end surface is provided on an end surface of the shaft gripping portion or the shaft connection portion, and the engagement is performed at the closed position of the half ring portion on the end surface of the shaft gripping portion or the shaft connection portion adjacent to the end surface. The loose-leaf binding device according to claim 4 , wherein the loose-leaf binding device is provided with an engagement convex portion that fits into the concave portion and comes out of the engagement concave portion with a relative displacement along the extending direction of the substrate. 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 used as an engagement concave portion into which the engagement convex portion is fitted. The loose-leaf binding tool according to claim 5 . On the end face of the shaft gripping part or the shaft coupling part provided with the engaging concave part, an engaging convex part that is disengaged from the engaging concave part due to relative displacement along the extending direction of the substrate is at the open position of the half ring part. The loose-leaf binding tool according to claim 5 , wherein a stopper surface that abuts is provided. On the end surface of the shaft gripping part or the shaft coupling part provided with the engaging concave part, the engaging convex part released from the engaging concave part due to the relative displacement along the extending direction of the substrate is applied when the substrate is displaced. A convex slide area that slides in contact with the end surface is provided so as to be raised, and the convex slide area increases the frictional resistance between the engaging convex portion and the end surface due to the rotational displacement of the substrate. The loose-leaf binding tool according to claim 5 or 7 . Two sets of engaging convex portions and engaging concave portions are provided on each end face of the shaft gripping portion or the shaft connecting portion adjacent to each other, and these engaging convex portions are brought into contact with each other at the open position of the half ring portion. The loose-leaf binding tool as described in any one of Claim 5,7,8 made.