Ring-type binder

Abstract

To provide a ring-type binder capable of preventing two substrates and a sheath from being displaced in the longitudinal direction even when the sheath is engaged with the two substrates due to relative displacement in the longitudinal direction.SOLUTION: In a ring-type binder according to the present invention, substrate end engagement pawls 71 of two substrates 1, 2 each have a substrate inclined side surface 71a and a substrate positioning side surface 71b, sheath end engagement pawls 421 of the sheath 4 each have a sheath inclined side surface 421a and a sheath positioning side surface 421b, the substrate inclined side surface 71a and the sheath inclined side surface 421a are configured to allow the substrate end engagement pawl 71 to get over the sheath end engagement pawl 421, and the substrate positioning side surface 71b and the sheath positioning side surface 421b are configured to abut on each other to regulate relative displacement of two substrates 1, 2 and the sheath 4 in the longitudinal direction.SELECTED DRAWING: Figure 23

Description

[Technical field]

[0001] The present invention relates to a ring-type binding device in which the tips of the half-ring portions are brought close to and separated from each other as two substrates are rotated and displaced under the action of a pressing force from a sheath body. [Background technology]

[0002] An example of a conventional ring-type binder of this type is the configuration shown in Patent Document 1 below. That is, in a conventional ring-type binder, two substrates (half plates) and a sheath are made of resin (hard plastic). Engagement grooves are provided on the sides of the two substrates, and the sheath is provided with an inclined surface that engages with the engagement grooves. The sheath is disposed below the two substrates, and is pressed from below toward the two substrates to engage the inclined surface with the engagement grooves, thereby assembling the two substrates to the sheath. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2001-239781 A Summary of the Invention [Problem to be solved by the invention]

[0004] When a large stress is applied to the resin, cracks occur. In the conventional configuration described above, the inclined surfaces are engaged with the engagement grooves by pressing the sheath body from below toward the two substrates, so it is difficult to make the inclined surfaces longer in order to prevent cracks from occurring in the sheath body or the inclined surfaces, and the two substrates and the sheath body are easily separated into upper and lower parts.

[0005] In addition, a resin sheath tends to have a weaker pressing force than a metal sheath. In the conventional configuration, the pressing force can be increased by lengthening the inclined surface of the sheath, but in a configuration in which the sheath is attached to the two boards from below, it is still difficult to increase the length.

[0006] Another possible assembly method is to engage the inclined surfaces of the sheath body with the engagement grooves of the two substrates by displacing the two substrates and the sheath body relative to each other in the longitudinal direction. By adopting this assembly method, the inclined surfaces can be lengthened, preventing the two substrates and the sheath body from separating from each other vertically, and ensuring a pressing force. However, in this case, it is necessary to make the two substrates and the sheath body displaceable relative to each other in the longitudinal direction, which makes the two substrates and the sheath body more likely to shift in the longitudinal direction.

[0007] The present invention has been made to solve the above-mentioned problems, and one of its objects is to provide a ring-type binding device that can prevent the two substrates and the sheath body from shifting longitudinally even when the sheath body is engaged with the two substrates by relative displacement in the longitudinal direction. [Means for solving the problem]

[0008] In one embodiment, a ring-type binding device according to the present invention comprises two longitudinal substrates extending in parallel adjacent to each other, a plurality of half-ring portions provided on the front side of the two substrates, and a longitudinal sheath body made of a material including a resin material, the sheath body being arranged on the rear side of the two substrates, sandwiching the two substrates from the outside in the width direction and pressing the two substrates against each other to hold them in place, the respective tips of the half-ring portions being brought closer to each other and separated from each other as the two substrates are rotated and displaced under the action of the pressing force of the sheath body, the ring-type binding device comprising: an outer surface of each of the two substrates having an engagement groove portion extending in the longitudinal direction; and inside the engagement groove portion, substrate end engagement claws arranged at both ends of the two substrates in the longitudinal direction, the substrate end engagement claws being arranged on the inner side of the substrate in the longitudinal direction and extending at an angle with respect to the width direction, and a substrate inclined side surface of the substrate in the longitudinal direction, the substrate end engagement claws being arranged on the inner side of the substrate in the longitudinal direction and extending at an angle with respect to the width .... The sheath body has a back plate portion, side plate portions raised from both side edges of the back plate portion, and sheath engagement claws protruding from each tip of the side plate portions in a direction approaching each other and inserted into the engagement grooves, and the sheath engagement claws are provided with sheath end engagement claws arranged at both ends of the sheath body in the longitudinal direction, and each of the sheath end engagement claws has a sheath inclined side surface arranged on the outside of the sheath body in the longitudinal direction and extending at an incline with respect to the width direction, and a sheath positioning side surface arranged on the inside of the sheath body in the longitudinal direction and extending in the width direction, and the board inclined side surface and the sheath inclined side surface are configured to allow the board end engagement claws to overcome the sheath engagement claws and the sheath end engagement claws, and the board positioning side surface and the sheath positioning side surface are configured to abut against each other to regulate the relative displacement between the two boards and the sheath body in the longitudinal direction. Effect of the Invention

[0009] According to one embodiment of the ring-type binding device of the present invention, the substrate positioning surface and the sheath positioning surface are configured to abut against each other to regulate the relative displacement between the two substrates and the sheath body in the longitudinal direction. Therefore, even when the sheath body is engaged with the two substrates by relative displacement in the longitudinal direction, the two substrates and the sheath body can be prevented from shifting in the longitudinal direction. [Brief description of the drawings]

[0010] [Figure 1] 1 is a front view showing a ring-type binder according to an 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] FIG. 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 as viewed obliquely from above. [Figure 7] 7 is a perspective view of the ring binder of FIG. 6 when viewed upside down. [Figure 8] 2 is a front view showing the first substrate of FIG. 1 alone. FIG. [Figure 9] FIG. 9 is a plan view showing the first substrate of FIG. 8. [Figure 10] 9 is a bottom view showing the first substrate of FIG. 8. FIG. [Figure 11] 10 is a cross-sectional view of the first substrate taken along line XI-XI in FIG. 8. [Figure 12] 10 is a cross-sectional view of the first substrate taken along line XII-XII in FIG. 8. [Figure 13] 12 is a cross-sectional view showing a state in which the protruding convex surface of FIG. 11 is fitted into the protruding concave surface of the second substrate in the closed state. [Figure 14] 13 is a cross-sectional view showing a state in which the protruding convex surface of FIG. 11 is fitted into the protruding concave surface of FIG. 12 in the open state; FIG. [Figure 15]2 is a cross-sectional view of the ring binder taken along line XVa-XVa in FIG. 1. [Figure 16] FIG. 2 is a rear view showing the first substrate of FIG. [Figure 17] 17 is a cross-sectional view of the first substrate taken along line XVII-XVII in FIG. 16. [Figure 18] FIG. 2 is a perspective view showing the sheath body of FIG. 1 alone. [Figure 19] FIG. 19 is a cross-sectional view of the sheath body taken along plane XIX of FIG. [Figure 20] FIG. 19 is a cross-sectional view of the sheath taken along plane XX of FIG. 18. [Figure 21] FIG. 19 is a plan view showing the sheath of FIG. 18. [Figure 22] 2 is an explanatory diagram showing a state in which a first substrate and a second substrate are inserted from one end of the sheath body in FIG. 1. FIG. [Figure 23] 23 is an explanatory diagram showing the relationship between the board end locking claws and the sheath end locking claws in region XXIII of FIG. 22. [Figure 24] 2 is an explanatory view showing a state in which a first substrate and a second substrate are inserted from the other end of the sheath in FIG. 1. FIG. [Diagram 25] 23 is an explanatory diagram showing the relationship between the board end engaging claws and the sheath middle engaging claws in region XXV of FIG. 22. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] 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.

[0012] Fig. 1 is a front view showing a ring type binder according to an 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 ring type binder of Fig. 1 when viewed diagonally from above, and Fig. 7 is a perspective view of the ring type binder of Fig. 6 when viewed upside down. The rear view of the ring type binder is symmetrical to the front view.

[0013] The ring binder shown in Figures 1 to 7 is a device for binding multiple sheets of paper with multiple holes, such as loose-leaf paper. As shown in Figures 1 to 7, the ring binder has two base plates 1 and 2, multiple half-ring portions 3, and a sheath body 4.

[0014] The two substrates 1 and 2 extend parallel to each other and are adjacent to each other. The direction in which the two substrates 1 and 2 extend is sometimes referred to as a longitudinal direction D1. The two substrates 1 and 2 are sometimes referred to as a first substrate 1 and a second substrate 2.

[0015] The half-ring portions 3 are integrally formed with the first substrate 1 and the second substrate 2, respectively, and extend toward the front surface side of the first substrate 1 and the second substrate 2. The half-ring portions 3 are arranged on the first substrate 1 and the second substrate 2, respectively, 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 the first substrate 1 and the second substrate 2 is the same. The number of the half-ring portions 3 can be arbitrarily changed according to the length of the first substrate 1 and the second substrate 2, and may be an even number or an odd number. In the ring-type binding device of this embodiment, six half-ring portions 3 are provided on each of the first substrate 1 and the second substrate 2. On each of the first substrate 1 and the second substrate 2, two half-ring groups each composed of three half-ring portions 3 are arranged spaced apart from each other in the longitudinal direction D1.

[0016] The sheath body 4 is made of a material containing a resin material and is shaped like an elongate member, and is disposed on the rear side of the first substrate 1 and the second substrate 2, sandwiching the first substrate 1 and the second substrate 2 from the outside in the width direction D2 and pressing and holding the first substrate 1 and the second substrate 2 against each other. The width direction D2 may be a direction perpendicular to the longitudinal direction D1.

[0017] Various materials including a resin material constituting the sheath body 4 can be used. As the material including a resin material, a petroleum-derived resin such as polycarbonate may be used, but a biomass plastic may also be used. Biomass plastic may mean a resin not derived from petroleum, such as a paper-derived or plant-derived resin. The material including a resin material may include a material derived from paper, corn, egg shells, or shells. The material constituting the first substrate 1 and the second substrate 2 may be the same as the sheath body 4, or may be a different material from the sheath body 4. An example of a material different from the sheath body 4 is a metal such as an iron-based material.

[0018] The ring type binder of this embodiment is configured so that the tips of the half ring portions 3 approach each other and move apart as the first substrate 1 and the second substrate 2 are rotated and displaced under the action of the pressing force of the sheath body 4. The state in which the tips of the half ring portions 3 are approaching each other is sometimes called a closed state, and the state in which the tips of the half ring portions 3 are separated from each other is sometimes called an open state. Figures 1 to 7 show the ring type binder in the open state.

[0019] Knobs 5 that a user can operate when rotating and displacing the first substrate 1 and the second substrate 2 may be provided on both ends of the first substrate 1 and the second substrate 2. As particularly shown in Figures 4 and 5, in the open state, the first substrate 1 and the second substrate 2 are rotated and displaced so that the tips 5a of the knobs 5 approach each other. The closed state can be achieved by rotating and displacing the first substrate 1 and the second substrate 2 so that the tips 5a of the knobs 5 are moved away from each other.

[0020] Next, the substrates 1 and 2 will be described with reference to FIGS. 8 is a front view showing the first substrate 1 alone in FIG. 1, FIG. 9 is a plan view showing the first substrate 1 in FIG. 8, and FIG. 10 is a bottom view showing the first substrate 1 in FIG. 11 is a cross-sectional view of the first substrate 1 taken along line XI-XI in FIG. 8, FIG. 12 is a cross-sectional view of the first substrate 1 taken along line XII-XII in FIG. 8, FIG. 13 is a cross-sectional view showing the state in which the protruding convex surface 60 in FIG. 11 is fitted into the protruding concave surface 61 of the second substrate 2 in the closed state, and FIG. 14 is a cross-sectional view showing the state in which the protruding convex surface 60 in FIG. 11 is fitted into the protruding concave surface 61 in FIG. 12 in the open state. Fig. 15 is a cross-sectional view of the ring binder taken along line XVa-XVa in Fig. 1. Fig. 15 shows a cross section of the first substrate 1 and the second substrate 2 taken along line XVb-XVb in Fig. 8. 16 is a rear view showing the first substrate 1 of FIG. 1, and FIG. 17 is a cross-sectional view of the first substrate 1 taken along line XVII-XVII of FIG.

[0021] The two substrates 1, 2, i.e., the first substrate 1 and the second substrate 2, may have different shapes, but have the same shape in the ring-type binder of this embodiment. Although the first substrate 1 is shown in Figs. 8 to 10, the configuration of the second substrate 2 is the same as that of the first substrate 1. The first substrate 1 and the second substrate 2 may have shapes that are line-symmetrical about the center in the longitudinal direction D1, and in a state in which the ring-type binder is assembled as shown in Figs. 1 to 7, the first substrate 1 and the second substrate 2 can be arranged to face each other by being inverted with respect to the longitudinal direction D1.

[0022] The inner side surfaces 6 of the first substrate 1 and the second substrate 2 are provided with a protruding convex surface 60 and a protruding concave surface 61 that fit together. The inner side surfaces 6 of the first substrate 1 and the second substrate 2 are surfaces that are located on the inside in the width direction D2 and face each other when the ring-type binding device is assembled as shown in Figs. 1 to 7. The protruding convex surface 60 and the protruding concave surface 61 may be arranged at positions that are symmetrical with respect to the center in the longitudinal direction D1. As shown in Figs. 11 and 12 in particular, the protruding convex surface 60 and the protruding concave surface 61 are formed with opposing protrusions 60a, 61a that collide with each other during the rotational displacement of the first substrate 1 and the second substrate 2, overcome the pressing force of the sheath body 4, and resist the rotational displacement. When the first substrate 1 and the second substrate 2 are rotated and displaced, the opposing protrusions 60a, 61a resist the rotational displacement, so that the half-ring parts 3 that are in contact with each other and closed do not open easily. As a result, even a relatively large number of sheets can be effectively stapled. More specifically, when the opposing protrusions 60a, 61a climb over each other, the distance from the fulcrum is extended compared to when the opposing protrusions 60a, 61a are not present, and the repulsive force (pressing force) can be increased. This is particularly useful when using a sheath 4 made of resin or the like that has weak spring properties.

[0023] As shown in FIG. 13, in the closed state, the opposing protrusions 60a, 61a are positioned offset from each other in the thickness direction D3 of the first substrate 1 and the second substrate 2. When the first substrate 1 and the second substrate 2 are rotationally displaced from this state, the opposing protrusions 60a, 61a climb up and then climb over each other as shown in FIG. 14. As a result, the first substrate 1 and the second substrate 2 are slightly displaced in a direction away from each other, and the sheath body 4 is pushed open, so that a large pressing force acts on the first substrate 1 and the second substrate 2 with an increase in the amount of elastic deformation. At that time, resistance to the rotational displacement is generated. This suppresses unintended opening of the half ring portion 3. Also, when changing from the open state to the closed state, resistance is generated against the rotational displacement at that time due to the opposing protrusions 60a, 61a climbing up.

[0024] The opposing protrusions 60a, 61a can be provided on the protruding convex surface 60 or the protruding concave surface 61 in a partial region in the thickness direction D3 of the first substrate 1 and the second substrate 2, protruding from the surface. The positions at which the opposing protrusions 60a, 61a are provided on the protruding convex surface 60 or the protruding concave surface 61 in the thickness direction D3 of the first substrate 1 and the second substrate 2 are desirably determined in consideration of the opening and closing positions of the half-ring portion 3 to which the opposing protrusions 60a, 61a apply resistance.

[0025] It is preferable that the protruding convex surface 60 and the protruding concave surface 61, including the opposing protrusions 60a, 61a, are configured with curved surfaces as in the illustrated example. In addition, it is preferable that the surfaces on both sides of the opposing protrusions 60a, 61a on the protruding convex surface 60 and the protruding concave surface 61 in the thickness direction D3 of the first substrate 1 and the second substrate 2 are formed slightly recessed so that the opposing protrusions 60a, 61a can move over and then enter the opposing protrusions 60a, 61a facing them, as shown in Figures 11 to 14.

[0026] The pair of opposed protrusions 60a, 61a provided on each of the first substrate 1 and the second substrate 2 may be provided in a pair in the longitudinal direction D1 of the first substrate 1 and the second substrate 2, but it is preferable to provide multiple pairs in order to provide a larger resistance force against rotational displacement. In addition, the pair of protruding convex surfaces 60 and protruding concave surfaces 61 may also be provided in a pair or multiple pairs in the longitudinal direction D1 of the first substrate 1 and the second substrate 2. In the illustrated embodiment, as particularly shown in FIG. 8, three protruding convex surfaces 60 are provided in the region from the center position to one end in the longitudinal direction D1 of the first substrate 1 and the second substrate 2, and three protruding concave surfaces 61 are provided in the region from the center position to the other end in the longitudinal direction D1 of the first substrate 1 and the second substrate 2.

[0027] Meanwhile, the inner surface 6 of each of the first substrate 1 and the second substrate 2 may be provided with a fulcrum protrusion 62 that serves as a fulcrum for the rotational displacement. As can be particularly seen from FIG. 15, a plurality of claw-shaped fulcrum protrusions 62 that protrude from the inner surface 6 and gradually decrease in thickness are provided on each of the first substrate 1 and the second substrate 2 at intervals in the longitudinal direction D1. As shown in FIG. 15, the fulcrum protrusion 62 of the first substrate 1 penetrates into the lower side of the second substrate 2. Conversely, the fulcrum protrusion 62 of the first substrate 1 penetrates into the lower side of the second substrate 2. When the half-ring portion 3 is opened or closed, the contact points between the fulcrum protrusions 62 of the first substrate 1 and the second substrate 2 and the lower surfaces of the second substrate 2 and the first substrate 1 become the rotational fulcrums, causing the rotational displacement of the first substrate 1 and the second substrate 2.

[0028] 8, the fulcrum protrusion 62 is preferably provided at a position adjacent to the protruding convex surface 60 and the protruding concave surface 61 in relation to the longitudinal direction D1 of the first substrate 1 and the second substrate 2. This is because, when the first substrate 1 and the second substrate 2 undergo rotational displacement around the rotational fulcrum of the fulcrum protrusion 62, resistance is effectively applied by the opposing protrusions 60a, 61a adjacent to the rotational fulcrum, making the rotational displacement operation even more stable.

[0029] As shown in FIG. 16, the outer side surface 7 of each of the first substrate 1 and the second substrate 2 (two substrates 1, 2) is provided with an engagement groove 70 extending in the longitudinal direction D1. The outer side surfaces 7 of the first substrate 1 and the second substrate 2 are surfaces located on the outer side in the width direction D2 when the ring-type binding device is assembled as shown in FIGS. 1 to 7. The engagement groove 70 may be formed so as to be recessed inward in the width direction D2 from the outer side surface 7. In the illustrated embodiment, both ends of the engagement groove 70 in the longitudinal direction D1 are open. However, one end of the engagement groove 70 in the longitudinal direction D1 may be closed.

[0030] As shown in Figs. 16 and 17, inside the engagement groove 70, board end locking claws 71 are provided at both ends of the first board 1 and the second board 2 in the longitudinal direction D1. In other words, the board end locking claws 71 are provided at one end and the other end of each of the first board 1 and the second board 2 in the longitudinal direction D1. The positions at which the board end locking claws 71 are provided may be the positions of the exact ends of the first board 1 and the second board 2 in the longitudinal direction D1, but may also be positions that are inward (central) from both ends in the longitudinal direction D1. For example, the regions from both ends of the first board 1 and the second board 2 in the longitudinal direction D1 to 1 / 3, more specifically 1 / 4, and even more specifically 1 / 5 of the total length of the first board 1 and the second board 2 in the longitudinal direction D1 may be understood as both ends.

[0031] In this embodiment, the distance Dis1 in the longitudinal direction D1 from one end of the first substrate 1 and the second substrate 2 to the substrate end locking claw 71 provided at the one end is set to be equal to the distance Dis2 in the longitudinal direction D1 from the other end to the substrate end locking claw 71 provided at the other end. Therefore, in a state where the ring-type binding device is assembled as shown in Figs. 1 to 7, the substrate end locking claw 71 of the first substrate 1 and the substrate end locking claw 71 of the second substrate 2 are disposed at the same position in the longitudinal direction D1 (see Fig. 23 and the like below). However, the distance Dis1 may be different from the distance Dis2, and the substrate end locking claw 71 of the first substrate 1 and the substrate end locking claw 71 of the second substrate 2 may be disposed at positions shifted from each other in the longitudinal direction D1.

[0032] 17, each of the board end locking claws 71 has a board inclined side surface 71a that is disposed on the inside (center side) of the first board 1 and the second board 2 in the longitudinal direction D1 and extends at an angle with respect to the width direction D2, and a board positioning side surface 71b that is disposed on the outside (anti-center side) of the first board 1 and the second board 2 in the longitudinal direction D1 and extends in the width direction D2. The positions of the board inclined side surface 71a and the board positioning side surface 71b are reversed between the board end locking claw 71 provided at one end and the board end locking claw 71 provided at the other end.

[0033] Corner 71c where board end locking claw 71 and board positioning side surface 71b butt against each other may be an acute angle, or may be an arcuate surface or a rounded portion.

[0034] Next, the sheath body 4 will be described with reference to Fig. 18 to Fig. 21. Fig. 18 is a perspective view showing the sheath body 4 of Fig. 1 alone, Fig. 19 is a cross-sectional view of the sheath body 4 taken along plane XIX of Fig. 18, Fig. 20 is a cross-sectional view of the sheath body 4 taken along plane XX of Fig. 18, and Fig. 21 is a plan view showing the sheath body 4 of Fig. 18.

[0035] 18 to 21, the sheath body 4 has a back plate portion 40, side plate portions 41 rising from both side edges of the back plate portion 40, and sheath engagement claws 42 protruding in directions approaching each other from the respective tips of the side plate portions 41. The sheath body 4 of this embodiment has a plurality of sheath engagement claws 42 arranged at a distance from each other in the longitudinal direction D1. The side plate portions 41 are arranged at a distance in the width direction D2.

[0036] As particularly shown in FIG. 20, the plate thickness t of the back plate 40 and the side plate 41 may be 1.2 to 1.5 mm, and the angle θ between the inner surface of the back plate 40 and the inner surface of the side plate 41 may be 80 to 90 degrees.

[0037] The sheath engagement claws 42 protruding from the tip of one side plate portion 41 protrude in the width direction D2 toward the other side plate portion 41, and the sheath engagement claws 42 protruding from the tip of the other side plate portion 41 protrude in the width direction D2 toward one side plate portion 41. As particularly shown in Figure 18, in the illustrated embodiment, the sheath engagement claws 42 protruding from the tip of one side plate portion 41 and the sheath engagement claws 42 protruding from the tip of the other side plate portion 41 are disposed at the same position in the longitudinal direction D1. However, these sheath engagement claws 42 may be disposed offset in the longitudinal direction D1.

[0038] In the illustrated embodiment, the sheath engagement claw 42 protrudes from the tip of the side plate portion 41. However, the sheath engagement claw 42 may protrude from a position lower than the tip of the side plate portion 41 toward the back plate portion 40. For example, the area from the tip of the side plate portion 41 to 1 / 3, more specifically 1 / 4, and even more specifically 1 / 5 of the total height of the side plate portion 41 along the thickness direction D3 may be understood to be the tip portion.

[0039] As shown in FIG. 19, the back plate portion 40 may be provided with a plurality of through holes 43 arranged below the sheath engagement claws 42.

[0040] Here, as shown in FIG. 13, in the assembled state of the ring-type binding device, the sheath-engaging claw 42 is inserted into the engagement groove 70 of the first board 1 and the second board 2. As a result, the first board 1 and the second board 2 are pressed against each other and held. The protruding amount PA (see FIG. 19) of the sheath-engaging claw 42 from the side plate 41 is preferably 1 / 3 or more of the depth De (see FIG. 11) of the engagement groove 70. As shown in FIG. 19, the protruding amount PA of the sheath-engaging claw 42 may be the distance in the width direction D2 between the tip of the sheath-engaging claw 42 and the base position of the sheath-engaging claw 42 on the inner surface of the side plate 41. As shown in FIG. 11, the engagement groove 70 has a first wall 701 and a second wall 702 extending from a bottom surface 700. The second wall 702 is located on the back side of the first board 1 and the second board 2 from the first wall 701. The depth De of the engagement groove 70 may be the distance in the width direction D2 from the bottom surface 700 to the tip of the second wall portion 702. In some embodiments, the first wall portion 701 may be omitted. In this case, the engagement groove 70 is formed by the surface of the second wall portion 702 on the front side and the bottom surface 700. In the illustrated embodiment, the bottom surface 700 of the engagement groove 70 is an arcuate surface, but when the first wall portion 701 is omitted, the bottom surface 700 may be a flat surface. By making the protrusion amount PA of the sheath engagement claw 42 1 / 3 or more of the depth De of the engagement groove 70, the separation of the first substrate 1 and the second substrate 2 from the sheath body 4 can be more reliably suppressed. On the other hand, it becomes difficult to engage the sheath engagement claw 42 with the engagement groove 70 by pressing the sheath body 4 against the first substrate 1 and the second substrate 2 from below.

[0041] As particularly shown in Fig. 21, the sheath engagement claws 42 are provided with sheath end engagement claws 421 arranged at both ends of the sheath body 4 in the longitudinal direction D1. The both ends may be understood to be the regions from both ends of the sheath body 4 to 1 / 3, more specifically 1 / 4, and even more specifically 1 / 5 of the total length of the sheath body 4 in the longitudinal direction D1. When a plurality of sheath engagement claws 42 are provided spaced apart from each other in the longitudinal direction D1 as in the sheath body 4 of this embodiment, the sheath end engagement claws 421 may be the sheath engagement claw 42 closest to one end of the sheath body 4 and the sheath engagement claw 42 closest to the other end of the sheath body 4 on each side plate portion 41.

[0042] Each of the sheath end engaging claws 421 has a sheath inclined side surface 421a that is disposed on the outer side (anti-center side) of the sheath body 4 in the longitudinal direction D1 and extends at an angle with respect to the width direction D2, and a sheath positioning side surface 421b that is disposed on the inner side (center side) of the sheath body 4 in the longitudinal direction D1 and extends in the width direction D2. The positions of the sheath inclined side surface 421a and the sheath positioning side surface 421b are reversed between the sheath end engaging claw 421 provided at one end and the sheath end engaging claw 421 provided at the other end.

[0043] Further, the sheath engagement claws 42 are provided with at least one sheath middle engagement claw 422 arranged between the sheath end engagement claws 421 in the longitudinal direction D1. In the illustrated embodiment, seven sheath middle engagement claws 422 are provided on each of the side plate portions 41. Both side surfaces of the sheath middle engagement claw 422 extend at an incline with respect to the width direction D2. That is, the sheath middle engagement claw 422 is provided with an inclined surface corresponding to the sheath inclined side surface 421a of the sheath end engagement claw 421, but is not provided with a surface extending in the width direction D2 corresponding to the sheath positioning side surface 421b.

[0044] Next, the functions or actions of the board end locking claws 71 of the first board 1 and the second board 2, and the sheath end locking claws 421 and sheath middle locking claws 422 of the sheath body 4 will be described with reference to Figs. 22 to 25. Figure 22 is an explanatory diagram showing the appearance when the first substrate 1 and the second substrate 2 are inserted from one end of the sheath body 4 in Figure 1, and Figure 23 is an explanatory diagram showing the relationship between the substrate end locking claw 71 and the sheath end locking claw 421 in region XXIII of Figure 22. FIG. 24 is an explanatory diagram showing the appearance when the first substrate 1 and the second substrate 2 are inserted from the other end of the sheath body 4 in FIG. 1, and FIG. 25 is an explanatory diagram showing the relationship between the substrate end locking claw 71 and the sheath middle locking claw 422 in area XXV of FIG. 22.

[0045] As shown in Figures 22 and 24, the ring-type fastener of this embodiment is adapted to insert the sheath engagement claws 42 of the sheath body 4 into the engagement groove portions 70 of the first substrate 1 and the second substrate 2 by relative displacement in the longitudinal direction D1 between the first substrate 1 and the second substrate 2 and the sheath body 4.

[0046] When this relative displacement occurs, the board inclined side surface 71a of the board end locking claw 71 and the sheath inclined side surface 421a of the sheath end locking claw 421 are configured to allow the board end locking claw 71 to climb over the sheath locking claw 42 and the sheath end locking claw 421. In addition, the board positioning side surface 71b of the board end locking claw 71 and the sheath positioning side surface 421b of the sheath end locking claw 421 are configured to restrict the relative displacement between the first board 1 and second board 2 and the sheath body 4 in the longitudinal direction D1 by abutting against each other. In other words, when the substrate positioning side 71b and the sheath positioning side 421b abut against each other, the relative displacement in the longitudinal direction D1 is restricted, and at other times (when the substrate inclined side 71a and the sheath inclined side 421a abut against each other, when the substrate inclined side 71a and the sheath positioning side 421b abut against each other, and when the substrate positioning side 71b and the sheath inclined side 421a abut against each other), the relative displacement in the longitudinal direction D1 is permitted.

[0047] As shown in Fig. 22, when the first board 1 and the second board 2 are inserted from one end of the sheath body 4 on the left side of the figure toward the right side of the figure, the board end locking claw 71 located on the left side of the figure in Fig. 22 can ride over the sheath end locking claw 421 toward the right side of the figure (see Fig. 23). After the board end locking claw 71 rides over the sheath end locking claw 421, when the first board 1 and the second board 2 are to be displaced in the opposite direction (to the left side of the figure), the board positioning side surface 71b of the board end locking claw 71 abuts against the sheath positioning side surface 421b of the sheath end locking claw 421, and the displacement of the first board 1 and the second board 2 toward the left side of the figure is restricted. As a result, even when the sheath body 4 is engaged with the first board 1 and the second board 2 by a relative displacement in the longitudinal direction D1, the first board 1 and the second board 2 and the sheath body 4 can be prevented from shifting in the longitudinal direction D1.

[0048] Both side surfaces of the sheath middle engagement claw 422 extend at an incline with respect to the width direction D2, and are configured to allow the board end locking claw 71 to climb over the sheath middle engagement claw 722. For example, as shown in Fig. 24, when the first board 1 and the second board 2 are inserted from the other end of the sheath body 4 on the right side toward the left side in the figure, the board positioning side surface 71b of the board end locking claw 71 located on the left side in Fig. 24 hits the sheath middle engagement claw 422 first, but can climb over the sheath middle engagement claw 422 toward the left side in the figure (see Fig. 25). As described above, by making the corner portion 71c where the board end locking claw 71 and the board positioning side surface 71b hit each other into an arc surface or an R portion, the board end locking claw 71 can climb over the sheath middle engagement claw 422 more smoothly.

[0049] 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.

[0050] The invention described in this specification can also be described as follows. [1] Two longitudinal substrates extending parallel to each other adjacent to each other; A plurality of half-ring portions provided on the front surface sides of the two substrates; a sheath body made of a material containing a resin material and arranged on the rear side of the two substrates, sandwiching the two substrates from the outside in the width direction, and pressing and holding the two substrates against each other; Equipped with With the rotational displacement of the two substrates under the action of the pressing force of the sheath body, the tips of the half-ring portions are brought close to each other and are separated from each other. A ring-type binder, The two substrates each have an outer surface provided with a longitudinally extending engagement groove, The inside of the engagement groove is provided with substrate end engagement claws arranged at both ends of the two substrates in the longitudinal direction, each of the board end engaging claws has a board inclined side surface that is disposed on an inner side of the board in the longitudinal direction and extends at an incline with respect to the width direction, and a board positioning side surface that is disposed on an outer side of the board in the longitudinal direction and extends in the width direction; The sheath body has a back plate portion, side plate portions raised from both side edges of the back plate portion, and sheath engagement claws protruding from the respective tips of the side plate portions in directions approaching each other and inserted into the engagement groove portions, The sheath engagement claws are provided with sheath end engagement claws arranged at both ends of the sheath body in the longitudinal direction, each of the sheath end engaging claws has a sheath inclined side surface that is disposed on an outer side of the sheath body in the longitudinal direction and extends at an incline with respect to the width direction, and a sheath positioning side surface that is disposed on an inner side of the sheath body in the longitudinal direction and extends in the width direction, the board inclined side surface and the sheath inclined side surface are configured to allow the board end locking claw to pass over the sheath end locking claw and the sheath end locking claw, the substrate positioning surface and the sheath positioning surface are configured to abut against each other to restrict relative displacement between the two substrates and the sheath body in the longitudinal direction. Ring type binding device. [2] The sheath engagement claws are provided with at least one sheath middle engagement claw disposed between the sheath end engagement claws in the longitudinal direction, Both side surfaces of the sheath middle engaging claw extend at an incline with respect to the width direction and are configured to allow the board end engaging claw to pass over the sheath middle engaging claw. 2. A ring-type binding device as described in paragraph 1. [3] The protrusion amount of the sheath engagement claw from the side plate portion is 1 / 3 or more of the depth of the engagement groove portion. 3. A ring-type binding device as described in paragraph 1 or 2. [4] Both ends of the engagement groove portion in the longitudinal direction are open. A ring-type binding device according to any one of claims 1 to 3. [5] a convex surface with projections and a concave surface with projections that fit into each other are provided on the inner surfaces of each of the two substrates, and opposing projections are formed on the convex surface with projections and the concave surface with projections, which collide with each other during the rotational displacement and overcome the pressing force to resist the rotational displacement; A ring-type binding device according to any one of claims 1 to 4. [6] The material containing the resin material is a biomass plastic. A ring-type binding device according to any one of claims 1 to 5. [7] The material containing the resin material includes a material derived from paper, corn, egg shells, or shells. 7. A ring-type binding device as described in paragraph 6. [Explanation of symbols]

[0051] 1,2: Substrate 3: Half ring part 4: Sheath body 40: Back plate 41: Side plate part 42: Sheath retaining claw 421: Scabbard end retaining claw 421a: Scabbard slanted side 421b: Scabbard positioning side 422: Sheath middle attachment claw 6: Inner surface 60: Convex surface with protrusions 60a: opposing protrusion 61: Concave surface with protrusion 61a: Opposed protrusion 7:Outer surface 70: Attachment groove 71: Circuit board end locking claw 71a: Slanted side of board 71b: Board positioning side

Claims

1. Two longitudinal substrates extending parallel to each other adjacent to each other; A plurality of half-ring portions provided on the front surface sides of the two substrates; a sheath body made of a material containing a resin material and arranged on the rear side of the two substrates, sandwiching the two substrates from the outside in the width direction, and pressing and holding the two substrates against each other; Equipped with With the rotational displacement of the two substrates under the action of the pressing force of the sheath body, the tips of the half-ring portions are brought close to each other and are separated from each other. A ring-type binder, The two substrates each have an outer surface provided with a longitudinally extending engagement groove, The inside of the engagement groove is provided with substrate end engagement claws arranged at both ends of the two substrates in the longitudinal direction, each of the board end engaging claws has a board inclined side surface that is disposed on an inner side of the board in the longitudinal direction and extends at an incline with respect to the width direction, and a board positioning side surface that is disposed on an outer side of the board in the longitudinal direction and extends in the width direction; The sheath body has a back plate portion, side plate portions raised from both side edges of the back plate portion, and sheath engagement claws protruding from the respective tips of the side plate portions in directions approaching each other and inserted into the engagement groove portions, The sheath engagement claws are provided with sheath end engagement claws arranged at both ends of the sheath body in the longitudinal direction, each of the sheath end engaging claws has a sheath inclined side surface that is disposed on an outer side of the sheath body in the longitudinal direction and extends at an incline with respect to the width direction, and a sheath positioning side surface that is disposed on an inner side of the sheath body in the longitudinal direction and extends in the width direction, the substrate inclined side surface and the sheath inclined side surface are configured to allow the substrate end locking claw to pass over the sheath end locking claw and the sheath end locking claw, the substrate positioning surface and the sheath positioning surface are configured to abut against each other to restrict relative displacement between the two substrates and the sheath body in the longitudinal direction. Ring type binding device.

2. The sheath engagement claws are provided with at least one sheath middle engagement claw that is disposed between the sheath end engagement claws in the longitudinal direction, Both side surfaces of the sheath middle engaging claw extend at an incline with respect to the width direction and are configured to allow the board end engaging claw to pass over the sheath middle engaging claw. The ring-type binding device according to claim 1.

3. The protrusion amount of the sheath engagement claw from the side plate portion is 1 / 3 or more of the depth of the engagement groove portion. The ring-type binding device according to claim 2.

4. Both ends of the engagement groove portion in the longitudinal direction are open. The ring-type binder according to any one of claims 1 to 3.

5. a convex surface with projections and a concave surface with projections that fit into each other are provided on the inner surfaces of each of the two substrates, and opposing projections are formed on the convex surface with projections and the concave surface with projections, which collide with each other during the rotational displacement and overcome the pressing force to resist the rotational displacement; The ring-type binder according to any one of claims 1 to 3.

6. The material containing the resin material is a biomass plastic. The ring-type binder according to any one of claims 1 to 3.

7. The material containing the resin material includes a material derived from paper, corn, egg shells, or shells. The ring-type binding device according to claim 6.

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