Ring type binding tool

Abstract

To provide a ring type binding tool which can reduce the possibility that a pair of substrates are separated from one another.SOLUTION: There is provided a ring type binding tool in which, in at least one of a pair of substrates 1 and 2, an engagement claw 40 projects from at least one outer surface of a plurality of pivotally supporting parts 4, and an engagement part 41 to be engaged with the engagement claw 40 is provided on at least the other of the pair of substrates 1 and 2, the engagement claw 40 gets over the engagement part 41 from a first side part S1 to a second side part S2 of the engagement part 40, by rotating the pair of substrates 1 and 2 in a close direction when the ring type binding tool is assembled, the engagement part 41 is engaged with the engagement claw 40, when the pair of substrates 1 and 2 are rotated in an open direction, and restricts the engagement claw 40 from getting over the engagement part 41 from the second side part S2 to the first side part S1.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a ring-type binding device in which a pair of substrates are connected to each other via a shaft portion. [Background technology]

[0002] As an example of this type of ring-type binding device that has been used in the past, there can be mentioned a ring-type binding device shown in the following Patent Document 1. Patent Document 1 describes a binding device including a pair of substrates (first base and second base) arranged parallel to each other and adjacent to each other. One substrate is provided with pivot support parts (bearing parts) near one end, the other end, and the center. The other substrate has a shaft part (shaft part) extending along the longitudinal direction of the other substrate. The one substrate is attached to the other substrate with the shaft part supported by the pivot support parts. A pair of substrates are provided rotatably in the circumferential direction of the shaft part, and half-ring parts (half-split ring parts) provided on the substrates are opened and closed by the rotation of the pair of substrates. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-37669 Summary of the Invention [Problem to be solved by the invention]

[0004] In a conventional configuration such as that described in Patent Document 1, a pair of substrates are provided rotatably in the circumferential direction of a shaft portion. If the pair of substrates rotate excessively, the pair of substrates may become separated from each other.

[0005] The present invention has been made to solve the above-mentioned problems, and one of its objects is to provide a ring-type binder that can reduce the risk of a pair of substrates becoming separated from each other. [Means for solving the problem]

[0006] In one embodiment, the ring-type binding device according to the present invention includes a pair of substrates extending in parallel adjacent to each other, a plurality of half-ring portions each formed integrally with the pair of substrates and extending on the front side of the pair of substrates, and a plurality of pivot portions each formed integrally with at least one of the pair of substrates and extending on the back side of at least one of the pair of substrates, the pivot portions gripping a shaft portion extending parallel to the pair of substrates connects the pair of substrates to each other via the shaft portion, and the pair of substrates is rotatable in the circumferential direction of the shaft portion, and in the direction of rotation of the pair of substrates, the tips of the respective half-ring portions are brought close to each other. A ring-type binding device having a closing direction in which the tips of the respective half-ring portions are moved away from each other, and an opening direction in which the tips of the respective half-ring portions are moved away from each other, wherein an engagement claw protrudes from an outer surface of at least one of the plurality of pivot supports on at least one of the pair of substrates, and an engagement portion with which the engagement claw engages is provided on at least the other of the pair of substrates, and when the pair of substrates are rotated in the closing direction during assembly of the ring-type binding device, the engagement claw rides over the engagement portion from a first side to a second side of the engagement portion, and when the pair of substrates are rotated in the opening direction, the engagement portion engages with the engagement claw, thereby preventing the engagement claw from riding over the engagement portion from the second side to the first side. Effect of the Invention

[0007] According to one embodiment of the ring-type binding device of the present invention, when the pair of substrates are rotated in the closing direction during assembly of the ring-type binding device, the engaging claw climbs over the engaging portion from the first side to the second side of the engaging portion, and when the pair of substrates are rotated in the opening direction, the engaging portion engages with the engaging claw and prevents the engaging claw from climbing over the engaging portion from the second side to the first side, thereby reducing the risk of the pair of substrates becoming separated from each other. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a front view showing a ring-type binder according to a first embodiment of the present invention. [Diagram 2]FIG. 2 is a plan view showing the ring-type binder of FIG. 1. [Diagram 3] 2 is a bottom view showing the ring binder of FIG. 1. [Figure 4] 2 is a left side view showing the ring binder of FIG. 1. [Diagram 5] 2 is a right side view showing the ring binder of FIG. 1. [Figure 6] 2 is a perspective view of the ring binder of FIG. 1 in a closed state, seen obliquely from above. [Figure 7] 7 is a perspective view of the ring binder of FIG. 6 in a closed state, viewed upside down. FIG. [Figure 8] 2 is a perspective view of the ring binder of FIG. 1 in an open state, seen obliquely from above. [Figure 9] 9 is a perspective view of the ring binder of FIG. 8 in a closed state, viewed upside down. [Figure 10] 2 is a plan view showing the pair of substrates in FIG. 1 in a state before the ring-type binder is assembled. FIG. [Figure 11] 11 is a cross-sectional view of the pair of substrates taken along line XI-XI in FIG. 10. [Figure 12] 12 is an explanatory diagram showing a state in which the pair of substrates has been rotated in a closing direction from the state shown in FIG. 11. FIG. [Figure 13] FIG. 13 is an enlarged view showing an area XIII in FIG. 12 . [Figure 14] 13 is an explanatory diagram showing a state in which the pair of substrates has been further rotated in the closing direction from the state in FIG. 12. FIG. [Figure 15] FIG. 15 is an enlarged view showing an area XV in FIG. [Figure 16] 9 is a perspective view showing one (first substrate) of the pair of substrates in FIG. 8. FIG. [Figure 17] 17 is a perspective view of one of the pair of substrates (first substrate) in FIG. 16, viewed upside down. [Figure 18] 9 is a perspective view showing the other of the pair of substrates (second substrate) in FIG. 8. FIG. [Figure 19] 19 is a perspective view of the other of the pair of substrates (second substrate) in FIG. 18 when viewed upside down. [Figure 20] FIG. 19 is a perspective view of a tip of the first half ring portion of FIG. 18. [Figure 21] FIG. 19 is a perspective view of a tip of the second half ring portion of FIG. 18. [Figure 22] FIG. 17 is a perspective view of a tip of the third half ring portion of FIG. 16. [Diagram 23] FIG. 11 is a perspective view of a ring-type binder according to a second embodiment of the present invention, as viewed obliquely from above. [Figure 24] 24 is a perspective view of the ring binder of FIG. 23 in a closed state, viewed upside down. FIG. [Diagram 25] FIG. 24 is a perspective view showing one (first substrate) of the pair of substrates in FIG. 23. [Figure 26] 26 is a perspective view of one (first substrate) of the pair of substrates in FIG. 25, viewed upside down. FIG. [Figure 27] 24 is a perspective view showing the other of the pair of substrates (second substrate) in FIG. 23. FIG. [Figure 28] 28 is a perspective view of the other of the pair of substrates (second substrate) in FIG. 27, viewed upside down. [Figure 29] 24 is a front view showing an engagement claw provided on the pivot support portion of FIG. 23. FIG. [Diagram 30] 24 is a front view showing an engagement portion with which the engagement claw of FIG. 23 is engaged. FIG. [Diagram 31] 31 is a rear view showing the engagement portion of FIG. 30. FIG. [Diagram 32] 31 is a perspective view of the engagement portion of FIG. 30 as viewed obliquely from above and to the left. [Diagram 33] 31 is a perspective view of the engagement portion of FIG. 30 as viewed obliquely from above on the right. [Diagram 34] 24 is a plan view showing the pair of substrates in FIG. 23 in a state before the ring-type binder is assembled. FIG. [Diagram 35] FIG. 35 is an enlarged view of an area XXXV in FIG. 34. [Diagram 36] 35 is an explanatory diagram showing a state in which the pair of substrates has been rotated in the closing direction from the state in FIG. 34. [Figure 37] FIG. 37 is an enlarged view showing an area XXXVII in FIG. 36. [Figure 38] 37 is an explanatory diagram showing a state in which the pair of substrates has been further rotated in the closing direction from the state shown in FIG. 36. FIG. [Figure 39] FIG. 39 is a cross-sectional view taken along line XXXIX in FIG. 38. [Diagram 40] FIG. 40 is an enlarged view showing an area XL in FIG. 39 . DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, the embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to each embodiment, and the components can be modified without departing from the gist of the present invention. In addition, various inventions can be formed by appropriately combining multiple components disclosed in each embodiment. For example, some components may be deleted from all the components shown in the embodiments. Furthermore, components of different embodiments may be appropriately combined.

[0010] Embodiment 1 Fig. 1 is a front view showing a ring type binder according to a first embodiment of the present invention, Fig. 2 is a plan view showing the ring type binder of Fig. 1, Fig. 3 is a bottom view showing the ring type binder of Fig. 1, Fig. 4 is a left side view showing the ring type binder of Fig. 1, and Fig. 5 is a right side view showing the ring type binder of Fig. 1. Fig. 6 is a perspective view of the closed state of the ring type binder of Fig. 1 seen from diagonally above, Fig. 7 is a perspective view of the closed state of the ring type binder of Fig. 6 seen from upside down, Fig. 8 is a perspective view of the open state of the ring type binder of Fig. 1 seen from diagonally above, and Fig. 9 is a perspective view of the closed state of the ring type binder of Fig. 8 seen from upside down. The rear view of the ring type binder is symmetrical to the front view.

[0011] The ring binder shown in Figures 1 to 9 is a device for binding multiple sheets of paper with multiple holes punched in them, such as loose-leaf paper. As shown in Figures 1 to 9, the ring binder has a pair of base plates 1, 2, multiple half-ring portions 3, and multiple pivot supports 4.

[0012] The pair of substrates 1, 2 extend parallel to each other adjacent to each other. The direction in which the pair of substrates 1, 2 extend is sometimes referred to as a longitudinal direction D1. When referring to the pair of substrates 1, 2 individually, one of the pair of substrates 1, 2 is sometimes referred to as a first substrate 1 and the other is sometimes referred to as a second substrate 2.

[0013] The half-ring portions 3 are integrally formed with the pair of substrates 1 and 2, respectively, and extend on the front surface side of the pair of substrates 1 and 2. The half-ring portions 3 are arranged on each of the pair of substrates 1 and 2, spaced apart from each other in the longitudinal direction D1. The half-ring portions 3 on the first substrate 1 are arranged to face the half-ring portions 3 on the second substrate 2. The number of the half-ring portions 3 on each of the pair of substrates 1 and 2 is the same. The number of the half-ring portions 3 can be arbitrarily changed according to the length of the substrates 1 and 2, and may be an even number or an odd number. In the ring-type binding device of this embodiment, five half-ring portions 3 are provided on each of the pair of substrates 1 and 2.

[0014] The multiple pivotal support portions 4 are integral with at least one of the pair of substrates 1, 2, and extend to the back surface side of at least one of the pair of substrates 1, 2. In other words, the pivotal support portions 4 are provided on the opposite side to the half-ring portion 3 in the front-back direction D2 (see FIG. 1) of the pair of substrates 1, 2.

[0015] In the ring-type binding device of this embodiment, the support portion 4 grasps the shaft portion 5 extending parallel to the pair of substrates 1, 2, thereby connecting the pair of substrates 1, 2 to each other via the shaft portion 5 and enabling the pair of substrates 1, 2 to rotate in the circumferential direction D3 of the shaft portion 5 (see Figure 6, etc.).

[0016] The shaft portion 5 may be a rod-shaped portion or member extending in the longitudinal direction D1. The shaft portion 5 may be a separate body from the pair of substrates 1, 2, or may be provided integrally with the pair of substrates 1, 2. As will be described later with reference to the drawings, the shaft portion 5 of this embodiment is provided integrally with the first substrate 1 in a portion of the region in the longitudinal direction D1, and is provided integrally with the second substrate 2 in another portion of the region in the longitudinal direction D1 (see FIGS. 16 to 19). In a portion of the region in the longitudinal direction D1, the pivot support portion 4 of the second substrate 2 grips the shaft portion 5 of the first substrate 1, and in another portion of the region in the longitudinal direction D1, the pivot support portion 4 of the first substrate 1 grips the shaft portion 5 of the second substrate 2.

[0017] By rotating the pair of substrates 1, 2, it is possible to switch between a closed state in which the tips of the multiple half-ring portions 3 are brought close to each other as shown in Figures 6 and 7, and an open state in which the tips of the multiple half-ring portions 3 are separated from each other as shown in Figures 8 and 9. In other words, the direction of rotation of the pair of substrates 1, 2 includes a closed direction in which the tips of the multiple half-ring portions 3 are brought close to each other, and an open direction in which the tips of the multiple half-ring portions 3 are separated from each other.

[0018] Next, Fig. 10 is a plan view showing the pair of substrates 1 and 2 in Fig. 1 before the ring binder is assembled, and Fig. 11 is a cross-sectional view of the pair of substrates 1 and 2 taken along line XI-XI in Fig. 10. Fig. 10 is also an enlarged view of region X in Fig. 3 before the ring binder is assembled, with the orientation changed. 12 is an explanatory diagram showing a state in which the pair of substrates 1, 2 have been rotated in the closing direction from the state shown in FIG. 11, and FIG. 13 is an enlarged view showing an area XIII in FIG. 14 is an explanatory diagram showing a state in which the pair of substrates 1, 2 have been further rotated in the closing direction from the state shown in FIG. 12, and FIG. 15 is an enlarged view showing an area XV in FIG.

[0019] 10 and 11, in at least one of the pair of substrates 1, 2, an engagement claw 40 protrudes from the outer surface of at least one of the multiple pivotal support portions 4. At least the other of the pair of substrates 1, 2 is provided with an engagement portion 41 with which the engagement claw 40 engages. In Figs. 10 and 11, the engagement claw 40 is shown to be provided on the pivotal support portion 4 of the first substrate 1, but for example, the engagement claw 40 shown on the right side of the paper in Figs. 3 and 7 is provided on the pivotal support portion 4 of the second substrate 2.

[0020] As shown in Figures 10 to 15, the pair of substrates 1, 2 are rotated in the closing direction when assembling the ring-type binding device. At this time, as shown particularly in Figures 13 and 15, the engagement claw 40 climbs over the engagement portion 41 from the first side S1 to the second side S2 of the engagement portion 41 as the pair of substrates 1 are rotated in the closing direction. As shown particularly in Figure 15, the engagement portion 41 engages with the engagement claw 40 when the pair of substrates 1, 2 are rotated in the opening direction, and restricts the engagement claw 40 from climbing over the engagement portion 41 from the second side S2 to the first side S1.

[0021] If the engaging claw 40 were omitted and the state of Fig. 11 could easily return from the state of Fig. 14 and Fig. 15, the pair of substrates 1, 2 could be separated unintentionally. In contrast, in the ring-type binding device of the present embodiment, when the pair of substrates 1, 2 are rotated in the opening direction, the engaging portion 41 engages with the engaging claw 40, and the engaging claw 40 is restricted from climbing over the engaging portion 41 from the second side S2 to the first side S1, so that the risk of the pair of substrates 1, 2 being separated from each other can be reduced.

[0022] The journal portion 4 from which the engagement claws 40 protrude may be a C-shaped protrusion extending in the circumferential direction D3 of the shaft portion 5. The journal portion 4 may grip the shaft portion 5 by disposing the shaft portion 5 inside the journal portion 4. As particularly shown in FIG. 13 , the radius of curvature of the inner circumferential surface 4a of the journal portion 4 from which the engagement claws 40 protrude may be larger than the radius of curvature of the outer circumferential surface 5a of the shaft portion 5, and a gap may be provided between the inner circumferential surface 4a of the journal portion 4 and the outer circumferential surface 5a of the shaft portion 5.

[0023] The engagement claws 40 in this embodiment protrude from the outer circumferential surface 4b of the pivot portion 4 in the radial direction of the shaft portion 5. As particularly shown in Fig. 13, the engagement claws 40 may be formed so that the amount of protrusion from the outer circumferential surface 4b increases from the tip 4c side of the pivot portion 4 toward the base end 4d side (root side). In other words, the engagement claws 40 may be tapered from the base end 4d side toward the tip 4c side of the pivot portion 4. The engagement claws 40 may have an end surface 40a (see Fig. 15) that is disposed on the base end 4d side and extends in the radial direction of the shaft portion 5.

[0024] 13, a flex groove 42 may be provided on the inner circumferential surface 4a of the support portion 4, and the thickness of the support portion 4 at the position of the flex groove 42 may be thinner than the thickness of the support portion 4 at a position adjacent to the flex groove 42 in the circumferential direction D3 of the shaft portion 5. By providing the flex groove 42 on the inner circumferential surface 4a of the support portion 4, the support portion 4 can be easily flexed at the position of the flex groove 42, and the engaging claw 40 can more easily overcome the engaging portion 41 from the first side S1 toward the second side S2. The flex groove 42 may be formed across the entire width of the support portion 4 in which the flex groove 42 is provided.

[0025] The pair of substrates 1, 2 may have inner surfaces 10 (see FIG. 11) that face each other when the pair of substrates 1, 2 are rotated in the closing direction, and outer surfaces 11 (see FIG. 11) that are located outside the inner surfaces 10, and the engagement portion 41 may have an engagement groove 410 formed in the outer surface 11 on the back surface side of the other of the pair of substrates 1, 2 (the engagement groove 410 is also clearly shown in FIG. 9). As shown in FIG. 13 and FIG. 15, the engagement groove 410 may be located in the second side S2 and may have a bottom surface 410a against which the engagement claw 40 abuts, and the bottom surface 410a is disposed at a position closer to the inner surface 10 than the outer surface 11 at a position adjacent to the engagement groove 410 in the longitudinal direction D1. In other words, the thickness of the other of the pair of substrates 1, 2 at the position of the engagement groove 410 is made thinner than the thickness of the other of the pair of substrates 1, 2 at a position adjacent to the engagement groove 410 in the longitudinal direction D1. Such an engagement groove 410 allows the engagement claw 40 to climb over the engagement portion 41 more easily from the first side S1 toward the second side S2.

[0026] 15, the engaging portion 41 may have a chamfered portion 411 in which a corner on the back side of the inner surface 10 is chamfered. The chamfered portion 411 is disposed on the first side S1 side. The chamfered portion 411 may be an R-surface as in the illustrated embodiment, or may be a C-surface (inclined surface). Such a chamfered portion 411 allows the engaging claw 40 to climb over the engaging portion 41 more easily from the first side S1 toward the second side S2.

[0027] Next, Figure 16 is an oblique view showing one (first substrate 1) of the pair of substrates 1, 2 in Figure 8, Figure 17 is an oblique view of one (first substrate 1) of the pair of substrates 1, 2 in Figure 16 when viewed upside down, Figure 18 is an oblique view of the other (second substrate 2) of the pair of substrates 1, 2 in Figure 8, and Figure 19 is an oblique view of the other (second substrate 2) of the pair of substrates 1, 2 in Figure 18 when viewed upside down.

[0028] The pair of substrates 1, 2 may have different shapes, but in the ring-type binding device of this embodiment, the substrates 1, 2 have the same shape. The substrates 1, 2 include a half-ring portion 3, a plurality of pivot support portions 4, and a shaft portion 5. The substrates 1, 2 may have shapes that are line-symmetrical about the center in the longitudinal direction D1, and may be arranged to face each other by being inverted with respect to the longitudinal direction D1.

[0029] In this embodiment, the shaft portion 5 is provided integrally with the first substrate 1 in a portion of the region in the longitudinal direction D1 (the region toward the rear of the paper in Figs. 16 to 19), and is provided integrally with the second substrate 2 in another portion of the region in the longitudinal direction D1 (the region toward the front of the paper in Figs. 16 to 19). The shaft portion 4 of the second substrate 2 grips the shaft portion 5 of the first substrate 1 in the portion of the region in the longitudinal direction D1, and the shaft portion 4 of the first substrate 1 can grip the shaft portion 5 of the second substrate 2 in the other portion of the region in the longitudinal direction D1.

[0030] The bearing portion 4 may include a plurality of gripping bearing portions 400 for gripping the shaft portion 5 , and a plurality of fixed bearing portions 401 provided integrally with the shaft portion 5 .

[0031] The gripping shaft support parts 400 are each formed in a C-shape and are arranged at a distance from each other in the longitudinal direction D1. The number of gripping shaft support parts 400 is arbitrary, but an odd number of gripping shaft support parts 400 may be provided. The above-mentioned engagement claws 40 may be provided on the gripping shaft support parts 400. The engagement claws 40 may be provided on all of the gripping shaft support parts 400, but in this embodiment, they are provided on some of the gripping shaft support parts 400. The gripping shaft support parts 400 may have a first gripping shaft support part 400a on which the engagement claws 40 are provided and a second gripping shaft support part 400b on which the engagement claws 40 are not provided. In the illustrated embodiment, the gripping shaft support part 400 arranged at the center in the longitudinal direction D1 among the odd number of gripping shaft support parts 400 is the first gripping shaft support part 400a, and the other gripping shaft support parts 400 are the second gripping shaft support parts 400b.

[0032] An auxiliary support portion 420 may be provided on the side of the second gripping support portion 400b where the engagement claw 40 is not provided. The second gripping support portion 400b may be a C-shaped portion extending in one direction in the width direction D5 of the substrates 1 and 2, and the auxiliary support portion 420 may be a C-shaped portion extending in the other direction in the width direction D5 of the substrates 1 and 2. By providing the auxiliary support portion 420, the shaft portion 5 can be gripped over a wider area in the circumferential direction D3 of the shaft portion 5.

[0033] The multiple fixed shaft supports 401 support the shaft portion 5 at a position away from the back surface of the substrates 1 and 2. The shaft portion 5 may have multiple partial shafts 50 with the fixed shaft supports 401 arranged at both ends. The multiple gripping shaft supports 400 and the auxiliary shaft supports 420 may grip each of the partial shafts 50. The multiple partial shafts 50 may include a first partial shaft 501 gripped by a first gripping shaft support 400a provided with an engagement claw 40, and a second partial shaft 502 gripped by a second gripping shaft support 400b not provided with an engagement claw 40. The diameter of the first partial shaft 501 may be smaller than the diameter of the second gripping shaft support 400b. By having a smaller diameter of the first partial shaft 501, a gap can be more reliably provided between the inner peripheral surface of the first gripping shaft support 400a and the outer peripheral surface of the first partial shaft 501. By providing such a gap, the first gripping shaft support portion 400a can be deflected more reliably, and the engaging claw 40 can overcome the engaging portion 41 more easily.

[0034] Next, the half ring portion 3 will be described with further reference to Figures 20 to 22. Figure 20 is a perspective view showing the tip of the first half ring portion 31 in Figure 18, Figure 21 is a perspective view showing the tip of the second half ring portion 32 in Figure 18, and Figure 22 is a perspective view showing the tip of the third half ring portion 33 in Figure 16.

[0035] The semi-ring portions 3 may have any tip shape, but may have the first to third tip shapes shown in FIGS.

[0036] First, the common features of the first to third tip shapes will be described. The tip of the semi-ring portion 3 may have a tapered wedge-shaped portion 300 and a bottom plate 301 arranged adjacent to the base of the wedge-shaped portion 300. In a closed state in which the tip of the semi-ring portion 3 of the first substrate 1 and the tip of the semi-ring portion 3 of the second substrate 2 are close to each other as shown in Figs. 6 and 7, the wedge-shaped portion 300 of the semi-ring portion 3 of the first substrate 1 and the wedge-shaped portion 300 of the semi-ring portion 3 of the second substrate 2 are adjacent to each other. At this time, the tip of the wedge-shaped portion 300 of the semi-ring portion 3 of the first substrate 1 rests on the bottom plate 301 of the semi-ring portion 3 of the second substrate 2, and the tip of the wedge-shaped portion 300 of the semi-ring portion 3 of the second substrate 2 rests on the bottom plate 301 of the semi-ring portion 3 of the first substrate 1.

[0037] At least one tip of the plurality of half-ring portions 3 may be provided with a tip claw 302 that engages with each other when the tips are brought close to each other.

[0038] The multiple half ring portions 3 may include a first half ring portion 31 having a first tip shape shown in FIG. 20, a second half ring portion 32 having a second tip shape shown in FIG. 21, and a third half ring portion 33 having a third tip shape shown in FIG. 22.

[0039] The first half ring part 31 shown in Fig. 20 has a recess 301a and a protrusion 301b on the bottom plate 301. The second half ring part 32 shown in Fig. 21 has a recess 300a and a protrusion 300b on the wedge-shaped part 300. In the closed state, the recess 301a and the protrusion 301b of the first half ring part 31 engage with the protrusion 300b and recess 300a of the second half ring part 32, preventing the tip of the first half ring part 31 and the tip of the second half ring part 32 from moving away from each other. In other words, the recesses 300a, 301a and the protrusions 300b, 301b form the tip claw 302 described above.

[0040] The third half ring portion 33 shown in FIG. 22 does not have the recesses 300a, 301a and the protrusions 300b, 301b at its tip.

[0041] As shown in Figs. 16 to 19, each of the pair of substrates 1 and 2 is provided with an odd number of half ring portions 3 arranged side by side in the longitudinal direction D1 of the substrates 1 and 2, and the half ring portion 3 arranged at the center position in the longitudinal direction D1 of the substrates 1 and 2 may not be provided with a tip claw 302. That is, the half ring portion 3 arranged at the center position may be a third half ring portion 33 that does not have the recesses 300a, 301a and the protrusions 300b, 301b. When the first substrate 1 and the second substrate 2 have the same shape and are arranged to face each other by being inverted with respect to the longitudinal direction D1 as in this embodiment, interference of the tip claws 302 can be prevented by arranging the third half ring portion 33 that does not have the tip claw 302 at the center.

[0042] The first half ring portion 31, the second half ring portion 32, and the third half ring portion 33 may be arranged line-symmetrically about the center in the longitudinal direction D1 of the substrates 1, 2. As shown in Fig. 16, the third half ring portion 33 is arranged at the center position in the longitudinal direction D1, the first half ring portion 31 is arranged on the back side of the paper in Fig. 16, and the second half ring portion 32 is arranged on the front side of the paper in Fig. 16.

[0043] 16, the first and second half ring parts 31 and 32 have the wedge-shaped portion 300 disposed at one end in the longitudinal direction D1, while the third half ring part 33 has the wedge-shaped portion 300 disposed at the other end in the longitudinal direction D1. That is, the first and second half ring parts 31 and 32 have the wedge-shaped portion 300 and the bottom plate 301 disposed in the longitudinal direction D1 reversed from the third half ring part 33. By reversing the arrangement of the wedge-shaped portion 300 and the bottom plate 301 in this way, the relative displacement of the half ring parts 3 in the longitudinal direction D1 of each of the substrates 1 and 2 in the closed state can be suppressed.

[0044] Embodiment 2 FIG. 23 is a perspective view of the ring binder according to embodiment 2 of the present invention when viewed obliquely from above, and FIG. 24 is a perspective view of the ring binder in FIG. 23 when viewed upside down in the closed state. Figure 25 is an oblique view showing one (first substrate 1) of the pair of substrates 1, 2 in Figure 23, Figure 26 is an oblique view of one (first substrate 1) of the pair of substrates 1, 2 in Figure 25 when viewed upside down, Figure 27 is an oblique view of the other (second substrate 2) of the pair of substrates 1, 2 in Figure 23, and Figure 28 is an oblique view of the other (second substrate 2) of the pair of substrates 1, 2 in Figure 27 when viewed upside down. FIG. 29 is a front view showing the engagement claw 40 provided on the pivot support portion 4 of FIG. Figure 30 is a front view showing the engagement portion 41 with which the engagement claw 40 of Figure 23 engages, Figure 31 is a rear view showing the engagement portion 41 of Figure 30, Figure 32 is an oblique view of the engagement portion 41 of Figure 30 viewed from diagonally above the left, and Figure 33 is an oblique view of the engagement portion 41 of Figure 30 viewed from diagonally above the right.

[0045] In the first embodiment, the engaging claws 40 are described as protruding from the outer peripheral surface 4b of the pivot portion 4 in the radial direction of the shaft portion 5, but the shape or configuration of the engaging claws 40 may be changed as desired. In the ring-type binding device of the second embodiment, as particularly shown in Fig. 29, the engaging claws 40 are protruding from the side end surface 4e of the pivot portion 4 in the longitudinal direction D1 of the substrates 1 and 2.

[0046] As particularly shown in Figure 29, the support portion 4 may include a first support portion 43 and a second support portion 44 arranged side by side in the longitudinal direction D1, and the engagement claw 40 may include a first engagement claw 40b protruding from a side end face 4e of the first support portion 43 and a second engagement claw 40c protruding from a side end face 4e of the second support portion 44.

[0047] The first and second support portions 43, 44 may each be formed in a C-shape and may be spaced apart from each other in the longitudinal direction D1. The first engagement claw 40b of the first support portion 43 may protrude from the side end face 4e on the side away from the second support portion 44, and the second engagement claw 40c of the second support portion 44 may protrude from the side end face 4e on the side away from the first support portion 43.

[0048] The first engagement claw 40b and the second engagement claw 40c are formed so that the amount of protrusion from the side end surface 4e increases from the tip 4c side toward the base end 4d side (root side) of the first pivotal support portion 43 and the second pivotal support portion 44. In other words, the first engagement claw 40b and the second engagement claw 40c may be tapered from the base end 4d side toward the tip 4c side of the first pivotal support portion 43 and the second pivotal support portion 44. The first engagement claw 40b and the second engagement claw 40c may have an end surface 40a that is disposed on the base end 4d side and extends in the longitudinal direction D1.

[0049] A notch 45 may be provided on the side end faces 4e of the first support portion 43 and the second support portion 44 facing each other, the notch 45 being disposed at the base end 4d of each of the first support portion 43 and the second support portion 44. The width of the first support portion 43 and the second support portion 44 in the longitudinal direction D1 at the position of the notch 45 may be narrower than the width of the first support portion 43 and the second support portion 44 at a position adjacent to the notch 45 in the extension direction of the first support portion 43 and the second support portion 44.

[0050] In the ring-type binding device of the present embodiment 2, as particularly shown in Figures 30 to 33, the engagement portion 41 is configured by a protrusion 46 that protrudes from the side end face 4e of the pivot support portion 4 in the longitudinal direction D1 of the substrates 1 and 2.

[0051] The support portion 4 on which the projection 46 is provided may be a pair of fixed support portions 401 provided integrally with the shaft portion 5. The pair of fixed support portions 401 may be provided on both ends of one partial shaft 50 (the first partial shaft 501 gripped by the first gripping support portion 400a on which the engagement claws 40 are provided). The projection 46 may be provided on side end faces 4e of the pair of fixed support portions 401 facing each other. The projection 46 may be provided on a portion of the fixed support portion 401 in the circumferential direction, and may be disposed in a position close to the substrates 1, 2.

[0052] Next, the relationship between the engaging claw 40 and the engaging portion 41 in the second embodiment will be described with reference to Figs. 34 to 40. Fig. 34 is a plan view showing the pair of substrates 1, 2 in Fig. 23 in a state before assembly of the ring-type binder, Fig. 35 is an enlarged view showing an area XXXV (35) in Fig. 34, Fig. 36 is an explanatory view showing a state in which the pair of substrates 1, 2 have been rotated in the closing direction from the state in Fig. 34, Fig. 37 is an enlarged view showing an area XXXVII (37) in Fig. 36, Fig. 38 is an explanatory view showing a state in which the pair of substrates 1, 2 have been further rotated in the closing direction from the state in Fig. 36, Fig. 39 is a cross-sectional view taken along line XXXIX (39) in Fig. 38, and Fig. 40 is an enlarged view showing an area XL (40) in Fig. 39.

[0053] As shown in Figs. 34 to 40, the pair of substrates 1, 2 are rotated in the closing direction when assembling the ring-type binding device. At this time, as shown in Figs. 35 and 37, the first and second pivotal support portions 43, 44 are pressed by the projections 46 of the engagement portion 41, so that the tips 4c of the first and second pivotal support portions 43, 44 move in the closing direction while bending so as to approach each other. As described above, the first and second pivotal support portions 43, 44 are provided with the notches 45, so that the first and second pivotal support portions 43, 44 can bend more easily. The pair of substrates 1, 2 are rotated in the closing direction until the first and second engagement claws 40b, 40c overcome the projections 46 of the engagement portion 41 from the first side S1 to the second side S2 of the engagement portion 41, as shown in Figs. 38 to 40.

[0054] After the engagement claw 40 rides over the projection 46 of the engagement portion 41 from the first side S1 to the second side S2 of the engagement portion 41, as shown in Fig. 40 in particular, the projection 46 of the engagement portion 41 engages with the first engagement claw 40b and the second engagement claw 40c, and prevents the first engagement claw 40b and the second engagement claw 40c from riding over the engagement portion 41 from the second side S2 to the first side S1. The other configurations are the same as those of the first embodiment.

[0055] Although the preferred embodiment of the present invention has been described in detail above with reference to the accompanying drawings, the present invention is not limited to such an example. It is clear that a person having ordinary knowledge in the technical field to which the present invention pertains can conceive of various modified or altered examples within the scope of the technical ideas described in the claims, and it is understood that these also naturally belong to the technical scope of the present invention.

[0056] For example, in the first and second embodiments, the engaging claws 40 and the engaging portions 41 are provided on both of the pair of substrates 1, 2, but the engaging claws 40 may be provided on only one of the pair of substrates 1, 2, and the engaging portions 41 may be provided on only the other of the pair of substrates 1, 2. Also, in the first and second embodiments, the pair of substrates 1, 2 are described as having the same shape, but the pair of substrates 1, 2 may have different shapes.

[0057] The invention described in this specification can also be described as follows. [1] A pair of substrates extending parallel to each other adjacent to each other; a plurality of half-ring portions each formed integrally with the pair of substrates and extending toward the front surfaces of the pair of substrates; a plurality of pivot support portions that are integral with at least one of the pair of substrates and extend to a rear surface side of at least one of the pair of substrates; Equipped with The shaft portion extends parallel to the pair of substrates, and the pair of substrates are connected to each other via the shaft portion by the pivot support portion, and the pair of substrates are rotatable in a circumferential direction of the shaft portion. The directions of rotation of the pair of substrates include a closing direction in which the tips of the plurality of half-ring portions are brought close to each other, and an opening direction in which the tips of the plurality of half-ring portions are moved away from each other. A ring-type binder, At least one of the pair of base plates has an engagement claw protruding from an outer surface of at least one of the plurality of pivot support portions, At least the other of the pair of substrates is provided with an engagement portion with which the engagement claw is engaged, When the pair of base plates are rotated in the closing direction during assembly of the ring-type binding device, the engagement claws climb over the engagement portion from a first side to a second side of the engagement portion, the engaging portion engages with the engaging claw when the pair of substrates are rotated in the opening direction, and prevents the engaging claw from climbing over the engaging portion from the second side to the first side. Ring type binding device. [2] The engagement claw protrudes from an outer circumferential surface of the shaft support portion in a radial direction of the shaft portion. 2. A ring-type binding device as described in paragraph 1. [3] The engagement claw is formed so that the amount of protrusion from the outer circumferential surface increases from the tip side to the base end side of the pivot support portion. 3. A ring-type binding device as described in paragraph 2. [4] a flexure groove is provided on an inner peripheral surface of the journal portion, and a thickness of the journal portion at the position of the flexure groove is made thinner than a thickness of the journal portion at a position adjacent to the flexure groove in a circumferential direction of the shaft portion; 4. A ring-type binding device as described in paragraph 3. [5] The pair of substrates are provided with inner surfaces that face each other when the pair of substrates are rotated in the closing direction, and outer surfaces that are positioned outside the inner surfaces, The engaging portion has an engaging groove formed on the outer surface on the rear surface side of the other of the pair of substrates. A ring-type binding device according to any one of claims 2 to 4. [6] the engagement groove is located on the second side and has a bottom surface against which the engagement claw abuts, the bottom surface being disposed at a position closer to the inner surface than the outer surface at a position adjacent to the engagement groove in the longitudinal direction of the substrate; 6. A ring-type binding device as described in paragraph 5. [7] a thickness of the other of the pair of substrates at a position of the engagement groove is thinner than a thickness of the other of the pair of substrates at a position adjacent to the engagement groove in a longitudinal direction of the substrates; 7. A ring-type binding device as described in paragraph 5 or 6. [8] The engaging portion has a chamfered portion in which a corner portion on a back side of the inner surface is chamfered. A ring-type binding device according to any one of claims 5 to 7. [9] The engaging claw protrudes from a side end surface of the pivot support portion in a longitudinal direction of the base plate. 2. A ring-type binding device as described in paragraph 1.

[10] The support portion includes a first support portion and a second support portion arranged side by side in a longitudinal direction of the substrate, The engagement claw includes a first engagement claw protruding from a side end surface of the first pivot support portion and a second engagement claw protruding from a side end surface of the second pivot support portion. 10. A ring-type binding device as described in paragraph 9.

[11] The first engagement claw and the second engagement claw are formed so that the amount of protrusion from the side end surface increases from the tip side toward the base end side of the first pivotal support portion and the second pivotal support portion. 11. A ring-type binding device as described in paragraph 10.

[12] The engagement portion is configured by a protrusion protruding from a side end surface of the pivot support portion in a longitudinal direction of the substrate. A ring-type binder according to any one of claims 9 to 11.

[13] At least one tip of the plurality of half ring portions is provided with a tip claw that engages with each other when the tips are brought close to each other. A ring-type binding device according to any one of claims 1 to 12.

[14] Each of the pair of substrates has an odd number of the half-ring portions arranged side by side in a longitudinal direction of the substrate, and the half-ring portion arranged at a central position in the longitudinal direction of the substrate is not provided with the tip claw. 14. A ring-type binding device as described in paragraph 13. [Explanation of symbols]

[0058] 1,2: Substrate 3: Half ring part 4: Axial support 5: Shaft section 40: Engagement claw 41: Engagement part 42: Flex groove 43: First axis branch 44:Second axis branch 46: Protrusion 302: Tip claw

Claims

1. A pair of substrates extending parallel to each other adjacent to each other; a plurality of half-ring portions each formed integrally with the pair of substrates and extending toward the front surfaces of the pair of substrates; a plurality of pivot support portions that are integral with at least one of the pair of substrates and extend to a rear surface side of at least one of the pair of substrates; Equipped with The shaft portion extends parallel to the pair of substrates, and the pair of substrates are connected to each other via the shaft portion by the pivot support portion, and the pair of substrates are rotatable in a circumferential direction of the shaft portion. The directions of rotation of the pair of substrates include a closing direction in which the tips of the plurality of half-ring portions are brought close to each other, and an opening direction in which the tips of the plurality of half-ring portions are moved away from each other. A ring-type binder, At least one of the pair of base plates has an engagement claw protruding from an outer surface of at least one of the plurality of pivot support portions, At least the other of the pair of substrates is provided with an engagement portion with which the engagement claw is engaged, When the pair of base plates are rotated in the closing direction during assembly of the ring-type binding device, the engaging claws climb over the engaging portion from a first side to a second side of the engaging portion, the engaging portion engages with the engaging claw when the pair of substrates are rotated in the opening direction, and prevents the engaging claw from climbing over the engaging portion from the second side to the first side. Ring type binding device.

2. The engagement claw protrudes from an outer circumferential surface of the shaft support portion in a radial direction of the shaft portion. The ring-type binding device according to claim 1.

3. The engagement claw is formed so that the amount of protrusion from the outer circumferential surface increases from the tip side to the base end side of the pivot support portion. The ring-type binding device according to claim 2.

4. a flexure groove is provided on an inner peripheral surface of the shaft support portion, and a thickness of the shaft support portion at a position of the flexure groove is made thinner than a thickness of the shaft support portion at a position adjacent to the flexure groove in a circumferential direction of the shaft portion. The ring-type binding device according to claim 3.

5. The pair of substrates are provided with inner surfaces that face each other when the pair of substrates are rotated in the closing direction, and outer surfaces that are positioned outside the inner surfaces, The engaging portion has an engaging groove formed on the outer surface on the rear surface side of the other of the pair of substrates. The ring-type binder according to any one of claims 2 to 4.

6. the engagement groove is located on the second side and has a bottom surface against which the engagement claw abuts, the bottom surface being disposed at a position closer to the inner surface than to the outer surface at a position adjacent to the engagement groove in a longitudinal direction of the substrate; The ring-type binding device according to claim 5.

7. a thickness of the other of the pair of substrates at a position of the engagement groove is thinner than a thickness of the other of the pair of substrates at a position adjacent to the engagement groove in a longitudinal direction of the substrates; The ring-type binding device according to claim 5.

8. The engaging portion has a chamfered portion in which a corner portion on a back side of the inner surface is chamfered. The ring-type binding device according to claim 5.

9. The engaging claw protrudes from a side end surface of the pivot support portion in a longitudinal direction of the base plate. The ring-type binding device according to claim 1.

10. The support portion includes a first support portion and a second support portion arranged side by side in a longitudinal direction of the substrate, The engagement claw includes a first engagement claw protruding from a side end surface of the first pivot support portion and a second engagement claw protruding from a side end surface of the second pivot support portion. The ring-type binding device according to claim 9.

11. The first engagement claw and the second engagement claw are formed so that the amount of protrusion from the side end surface increases from the tip side toward the base end side of the first pivot support portion and the second pivot support portion. The ring-type binding device according to claim 10.

12. The engagement portion is configured by a protrusion protruding from a side end surface of the pivot support portion in a longitudinal direction of the substrate. The ring-type binder according to any one of claims 9 to 11.

13. At least one tip of the plurality of half ring portions is provided with a tip claw that engages with each other when the tips are brought close to each other. A ring-type binder according to any one of claims 1 to 4 or any one of claims 9 to 11.

14. Each of the pair of substrates is provided with an odd number of the half-ring portions arranged side by side in a longitudinal direction of the substrate, and the half-ring portion arranged at a central position in the longitudinal direction of the substrate is not provided with the tip claw. The ring-type binding device according to claim 13.

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