JP2009001298A - Coupling tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint which can be manufactured of a paper, and is easily attachable/detachable and has a large coupling force. <P>SOLUTION: In the joint 1 fitted to a through-hole 11 of a plurality of corrugated fiberboards 9 to connect the corrugated fiberboards, joint components 2a and 2b are turnably joined by a connecting part 13. Each joint component has stoppers A 5a and 5b on upper ends of barrel components 3a and 3b, and has stoppers B 7a and 7b on lower ends thereof. In other words, in the joint 1, a pair of joint components of the constitution are opposingly arranged in a plane symmetrical manner across a predetermined matching plane. Further, in the joint 1, a barrel part constituted of one set of barrel components is inserted in the through-hole in a closed state, and one set of the stoppers B is arranged at the inserting position in the through-hole in an open state. When the barrel part is inserted from the stopper B side and fitted to the through-hole, the joint 1 holds and connects the corrugated fiberboards by the stoppers A and B. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a joint (connector) for connecting a plurality of members to be coupled.

  Conventionally, as a joint for connecting members constituting a packaging box, a paper joint that can be easily detached is known (for example, see Patent Documents 1 and 2). Corrugated cardboard is generally used as a packaging box, but if a paper joint is used in this type of packaging box, the joint and cardboard can be recycled for recycling without separation. is there.

  The joint described in Patent Literature 1 is formed by pressing a cylindrical member into a disk-shaped member having a circular hole in the center, thereby attaching the disk-shaped member to the end of the cylindrical member. This joint is used when the upper case and the bottom case are connected to form a box, and is characterized by having a notch on the side surface of the cylindrical member. When the upper case and the bottom case are connected and fixed, the upper case and the bottom case are fitted so as to partially overlap each other, but the upper case and the bottom case are provided with through holes in the overlapping regions. The joint is fitted into the through hole to connect and fix the upper case and the bottom case.

  This fixing method will be described in detail. When fixing, first, the upper case is fitted into the bottom case from above. In this state, the through hole of the upper case and the through hole of the lower case do not completely coincide with each other, and the through hole of the upper case is shifted downward with respect to the through hole of the bottom case.

  Therefore, next, the upper case is lifted up a little so that the position of the through hole is adjusted without this shift, and in this state, the cylindrical member of the joint is inserted into the through hole. At that time, the notch of the cylindrical member is faced up. With the joint inserted in the through hole in this way, if you release your hand from the upper case and move the upper case from its top to its own weight, the outer edge of the through hole in the upper case and the notch will fit. The two cases are combined. In the prior art, the members constituting the packaging box are connected and fixed by such a method.

  In addition, the disk-shaped member attached to a joint is used when disassembling a packaging box. When the disk-shaped member is held and rotated, the cylindrical member rotates, the notch faces sideways or downward, the through hole of the upper case comes off from the notch, and the joint is pulled out. The packing box is disassembled in such a procedure.

  On the other hand, the joint used in the packaging box described in Patent Document 2 is provided with an engagement piece having a shape protruding in the radial direction with respect to the cylindrical member at one end of the cylindrical member, and the cylindrical member at the other end. In other words, a cylindrical cover piece having a larger diameter is provided.

The shape of the hole of the packaging box is configured to be fitted with the engagement piece. When the joint is used, the positional relationship is adjusted so that the engagement piece and the hole are fitted. The joint piece is inserted into the hole, and after the engagement piece passes through the hole, the joint is rotated by a predetermined angle. If it does in this way, a joint will not come out of a hole, and an engagement piece and a lid piece will pinch and connect two members which constitute a packaging box. Moreover, what is necessary is just to reversely rotate a joint only a predetermined angle when releasing a connection. In this way, the engagement piece fits into the hole, and the joint can be pulled out.
JP 2000-142673 A JP 2006-273423 A

However, the prior art has the following problems.
The first problem is a manufacturing problem. In the technique described in Patent Literature 1, a joint is formed by press-fitting a plurality of parts to each other, and these parts are made by laminating used paper several times. For this reason, this technique has a problem that it is difficult to perform dimension management necessary for press-fitting, and many defective products are generated. Further, in the technique described in Patent Document 1, the dimension management of the notch formed in the cylindrical member also requires accuracy. It is appropriate to form the notch by cutting, but if paper is used as a raw material, high dimensional accuracy cannot be expected, and poor fitting with a coupled member frequently occurs. Further, if a plurality of parts and three processes of molding, cutting and press-fitting are required, high cost is inevitable.

  And the second problem is weak binding force. The technology described in Patent Document 1 uses the weight of the upper case to connect the upper case and the bottom case via a joint. Therefore, when the packing box using this joint is turned upside down, the connection is easily removed and the packing box is disassembled. Also, when the joint is rotated by some external force, the connection is easily released. That is, the joint described in Patent Document 1 has a fragile structure in which the connection is released regardless of the intention of the user when the connection should not be released.

  In addition, when this connection should not be released, there is a problem that the connection is released regardless of the intention of the user. There was a serious problem.

  In addition, the conventional joint as described in Patent Document 1 has a problem that the method of attaching the joint to the coupled member is complicated. That is, in the prior art, while lifting the upper case, it is necessary to insert a joint into the through hole and further adjust the direction of the notch, and when connecting the coupled member using the joint, There was a problem that the work was time-consuming.

  The present invention has been made in view of these problems, and can be easily made with paper, is easier to attach and detach than in the past, and suppresses dropping and firmly connects the members to be coupled. The purpose is to provide a joint capable of.

  The joint of the present invention (claim 1) made to achieve such an object is a joint for connecting a plurality of coupled members, and has the following configuration. However, it is assumed that each of the coupled members is provided with a through hole for attaching the joint. That is, the joint is used by being inserted into the series of through holes in a state where a plurality of members to be joined are overlapped with each other and the through holes of the members to be joined are joined to other members to be joined.

  Specifically, the joint includes a pair of joint structures arranged with a predetermined alignment surface interposed therebetween. Each joint structure is provided at the lower end of the body part, the body part constituting the body part of the joint together with the other joint structure to be paired, the stopper A provided at the upper end of the body part structure It has a stopper B and is connected to the other joint structure so as to be rotatable about an axis parallel to the alignment surface and perpendicular to the vertical direction at the lower part of the stopper B.

  A pair of these joint components is in a state in which the joint components are arranged close to each other so that the vertical direction is parallel to the alignment surface across the alignment surface (hereinafter referred to as a “closed state”). The body part of the joint is constituted by a set of structural members.

  Specifically, the outer shape of the body part constituted by one set of the body part structure is longer in the vertical direction than the entire length of a series of through holes formed by overlapping a plurality of coupled members. The cross-sectional shape perpendicular to the vertical direction is a shape that can be inserted into the through hole. A pair of joint components configured in a state in which the body portion having such a shape is closed is formed by the stopper A and the stopper B in the state in which the body portion is closed and the body portion is inserted through a series of through holes. The plurality of coupled members are sandwiched from above and below, and the plurality of coupled members are coupled.

  In addition, the stopper B of each joint component is opened in a state where the pair of joint components are opened by rotating at a predetermined angle or more about the axis in the direction in which the stopper A leaves the alignment surface from the closed state. Together with the stopper B of the other joint structure, the through-hole of the coupled member can be inserted.

  That is, in the present invention, when the joint is opened and inserted into the through hole from the stopper B side and pushed in, the joint is deformed in the closing direction. Further, when the joint is pushed downward through the through-hole, the joint structure is closed, the joint body is received in the through-hole, and the stoppers A and B sandwich the member to be joined. The coupling member is connected.

  As described above, in the present invention, the joint is fitted and fixed to the through hole by a pushing operation rather than rotation, and the members to be coupled are sandwiched between the stoppers A and B while preventing the joint from being detached from the through hole. The coupled members are connected.

  Therefore, according to the present invention, it is possible to connect the coupled member more firmly than in the prior art in which the coupled member is coupled by rotating the joint to the coupled member, thereby preventing unintentional detachment of the joint. can do. Further, according to the present invention, since the method of connecting the members to be coupled is not employed by utilizing the weight of the members to be coupled, the joint is not disengaged regardless of the direction of the members to be coupled. Excellent effect in terms of bonding strength.

  Further, according to the present invention, the joint is configured by connecting the joint components, and the joint itself has a simple structure, so there is no need to configure a joint by fitting a plurality of parts, and by molding The joint can be manufactured easily. Therefore, according to the present invention, in terms of dimensional accuracy, many defective products are not generated, and the yield of products can be improved.

  Further, according to the present invention, it is not necessary to attach the joint to the coupled member by performing a complicated operation such as lifting the coupled member, and the joint can be inserted into the through hole from the stopper B side in an open state. It is easy to attach the joint to the through hole and connect the members to be coupled. Therefore, in this invention, the operation | work which connects a to-be-coupled member can be simplified, and the troublesomeness of an operation | work can be eased compared with the past.

  The joint according to claim 2 is configured to include a gripping portion. The grip portion is provided at a connection portion of the joint structure, and extends upward from the connection portion so as to protrude from the joint structure in a closed state.

  When the joint attached to the through hole is taken out from the through hole, it is necessary to rotate the joint structure in the opening direction so that the stopper B passes through the through hole. When it is possible to firmly fix the joint structure, it is not possible to take a wide space for rotating the joint structure in the opening direction. For this reason, it is necessary to lift the connection part of the joint structure from the stopper B side to the stopper A side so that the joint structure can be efficiently rotated in the opening direction.

  Therefore, in the present invention, the gripping portion is provided so that the joint portion of the joint structure can be lifted to the stopper A side and can be efficiently rotated in the opening direction.

  According to this joint, the joint can be easily removed by pulling the grip portion upward. When the grip portion is pulled upward, the joint is deformed so as to approach an open state while being translated upward. As a result, the stopper B can be inserted into the through hole, and the joint can be taken out from the through hole.

  Therefore, according to the present invention, not only the work of attaching the joint to the coupled member but also the work of removing the joint can be simplified, and when the joint is recycled, the work is efficiently performed. Can be done.

In addition, according to the present invention, since the joint structure is not removed by rotation, it is possible to prevent the joint from being accidentally detached due to some external force.
In addition, the joint according to claim 3 is characterized in that a gripping portion is formed by a connecting material for connecting a pair of joint components.

  In this joint, the gripping portion is connected to the joint structure so as to be rotatable about the axis at each of both end edges, and is further sandwiched between the both end edges and separated from one end edge by a predetermined distance. In other words, the center has a bending center that can be bent along the axis. In other words, the gripping portion is bent at the bending center and protrudes from the joint structure in the closed state.

  If the connecting member has the function of a gripping portion like this joint, a joint having the gripping portion can be formed without using a complicated configuration, and the joint can be easily manufactured by molding.

  That is, there is a problem that the mold design is very difficult in the method of configuring the joint so that the three parts of the gripping part and the two joint components are connected around the same axis. As in item 3), if the joint is configured such that the two joint components are rotatably connected with a connecting material and the holding material is provided by folding the connecting material, the design of the mold can be facilitated. Thus, manufacturing difficulties can be eliminated.

  In the closed state, the joint according to claim 4 has a hollow shape in which an upper portion is opened from the body portion, and a part or all of the grip portion is accommodated in the hollow portion. is there. According to this joint, since the grip portion is accommodated in the hollow portion in the closed state, the user can easily insert the finger into the hollow portion even if the grip portion does not protrude greatly from the upper surface of the joint. Can be gripped.

  That is, according to the present invention, the joint can be configured so that the user can easily grip the gripping portion without causing the gripping portion to largely protrude from the upper surface of the joint. In addition, it is possible to further reduce the possibility that the joint is accidentally pulled by some external force and the joint is detached.

  Moreover, the joint of Claim 5 provides a hole in the holding part. For example, the hole can be provided in the grip portion in a closed state so that the hole is generally oriented in a direction perpendicular to the vertical direction of the joint structure.

  When removing the joint attached to the member to be coupled, the gripping part is gripped and the joint is pulled upward, but if the hole is provided as described above, the hole becomes a non-slip, and the joint Removal becomes easier. Similarly, during insertion, since the hole is non-slip when the gripping portion is gripped and pushed in, the attachment becomes easy. Therefore, according to the present invention, workability related to the removal and attachment of the joint can be improved.

  The above-described joint can be made of paper as described in claim 6. If the joint is made of paper, waste paper can be used, which can contribute to environmental protection and reduce costs. Further, this joint can be manufactured by, for example, pulp molding.

  Moreover, the box of Claim 7 is a box formed by connecting a plurality of members by the joint of Claims 1 to 6. Specifically, through-holes are provided in the connection portions of the members, and each member is overlapped with the other members to be connected in a state where the through-holes are combined, and a series of through-holes in the combined state It is clamped by a joint inserted through and connected to another member.

  If a box is assembled using the joint of the present invention, the possibility that the joint is detached and the box is disassembled can be reduced. Further, since the members are not connected by utilizing their own weight, the box is not disassembled even if the box is tilted, which is very convenient.

  Further, if both are made of the same material, a box that does not require separation at the time of recycling can be manufactured, and the labor and cost at the time of recycling can be reduced.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1A is a front view of the joint 1 in a closed state, which is seen through the cardboard 9 to which the joint 1 is attached, and FIG. 1B is a bottom view thereof. Moreover, FIG.1 (c) is a front view of the joint 1 in the open state. 2 is a perspective view of the joint 1 in a developed state, and FIG. 3 is a perspective view of the joint 1 showing a state in which the joint 1 is attached to and detached from a corrugated cardboard 9 as a coupled member. .

  As shown in FIG. 1, the joint 1 of this embodiment is formed by connecting a pair of joint components 2 a and 2 b by a connecting portion 13. The joint structure 2a includes a stopper A5a at the upper end of the body structure 3a, and a stopper B7a at the lower end of the body structure 3a. Further, the joint structure 2b has a shape symmetrical to the joint structure 2a. The joint structure 2b includes a stopper A5b at the upper end of the body structure 3b, and a stopper B7b at the lower end of the body structure 3b. It is configured.

  In the joint 1 of this embodiment, the joint structures 2a and 2b configured as described above are arranged so as to face each other symmetrically with respect to the alignment surface 8, and the other joint structure facing each other at the lower ends of the stoppers B7a and 7b. 2a, 2b and the connection part 13 are connected so that rotation is possible. The joint 1 composed of these joint components 2a and 2b and the connecting portion 13 is not a structure in which each part is bonded after molding, but is integrally formed with paper by pulp molding or the like.

By the way, the above-mentioned “closed state” means a state in which the joint components 2 a and 2 b are arranged close to each other so that the vertical direction is parallel to the alignment surface 8 with the alignment surface 8 interposed therebetween.
In this closed state, the body 3 of the joint 1 is formed by a pair of body parts 3a and 3b (see FIG. 1A). Specifically, the joint 1 is configured such that the cross-sectional shape of the body portion 3 on the surface orthogonal to the alignment surface 8 is substantially similar to the through-hole 11, and this cross-sectional shape is greater than that of the through-hole 11. It is configured to be slightly smaller.

  As shown in FIG. 1B, the joint 1 of this embodiment is attached to a plurality of cardboards 9 provided with through holes 11 having rectangular holes with rounded corners. Therefore, the cross-sectional shape of the body portion 3 of the joint 1 is a rectangular shape with rounded corners.

  However, the joint 1 is configured so that the body 3 is hollow in a closed state. That is, the body part structures 3a and 3b included in the joint structures 2a and 2b are configured such that members are provided in a plate shape along the outer shape of the body part 3 (see FIG. 3). In other words, the body structure bodies 3a and 3b have a semi-cylindrical shape that is formed by dividing a rounded rectangular tube into two along its axis.

  In addition, as for trunk | drum structure 3a, 3b, the length Z of the up-down direction is set longer than the full length Hz of a series of through-hole of a joint attachment object. As shown in FIG. 3, the joint 1 of the present embodiment is a series of a plurality (two) of corrugated cardboards 9 having the same shape of the through-holes 11 formed by overlapping the through-holes 11. The plurality of cardboards 9 are connected to the through-holes 11. That is, the length Z in the vertical direction of the body parts 3a and 3b is set to be longer than the total length of the stacked cardboards 9 (Hz / 2), which is the total length of the series of through holes 11. Yes.

  Further, the stoppers A5a and 5b are extended from the upper end edges of the corresponding body part structures 3a and 3b so as to be inclined slightly upward from a direction perpendicular to the vertical axis of the body part bodies 3a and 3b. The structure is a thin plate. That is, the stoppers A5a and 5b are provided in a bowl shape with respect to the body structure bodies 3a and 3b.

  Specifically, the stoppers A5a and 5b extend from the upper end edges of the body part structures 3a and 3b toward the direction opposite to the direction toward the axis of the body part bodies 3a and 3b, in other words, toward the outside. It is set as the structure provided, and is provided only in the outer side of trunk | drum structure 3a, 3b. Due to the configuration of the stoppers A5a and 5b, the joint 1 of the present embodiment is in a closed state, the upper end of the body part 3 is not closed by the stoppers A5a and 5b, and the hollow part inside the body part 3 faces upward. Open configuration.

  Further, the stoppers A5a and 5b are provided at a distance sufficiently longer than the dimensional difference between the through-hole 11 and the cross-sectional shape of the body portion 3 so that the joint 1 does not fall out of the through-hole 11 in the closed state. , 3b is extended from the upper edge.

In addition, the stoppers B7a and 7b are also provided in a bowl shape from the lower end edges of the corresponding body part constituting bodies 3a and 3b, similarly to the stoppers A5a and 5b.
Specifically, the stoppers B7a, 7b are configured to extend from the lower end edges of the corresponding body part structures 3a, 3b in a direction perpendicular to the vertical axis of the body part structures 3a, 3b. ing. The stoppers B7a and 7b are different from the stoppers A5a and 5b in a shape having a thickness in the vertical direction, and the thickness is not uniform, that is, in a direction away from the axis of the body parts 3a and 3b, that is, The shape becomes smaller as it goes toward the tip side. That is, the stoppers B7a and 7b are tapered such that the stoppers B7a and 7b become narrower toward the tip, and the upper surface thereof is inclined downward and the lower surface thereof is inclined upward.

  The stoppers B7a and 7b are edges of the lower surface of the stopper B7a and 7b and face the alignment surface 8 with the joint 1 closed "perpendicular to the vertical direction of the joint components 2a and 2b and parallel to the alignment surface 8" The end edges 71 a and 71 b are pivotally joined to the connecting portion 13 (hereinafter, this end edge is referred to as a “joint end edge”). The length is set shorter than the length Hx along the matching surface 8.

  The stoppers B7a and 7b pass through the centers of their own joining edge 71a and 71b, and the length Y in the direction perpendicular to the vertical direction and perpendicular to the joining edge 71a and 71b is the length of the through-hole 11 along that direction. It is configured to be set sufficiently longer than one half of the length Hy. That is, the total 2Y of the length Y of the stoppers B7a and 7b is set to be longer than the length Hy of the through hole 11.

  Further, in the joint 1 of the present embodiment, the joint components 2a and 2b are in a direction from the closed state to the direction in which the stoppers A5a and 5b leave the alignment surface 8, and the joint end edges 71a and 71b are set as rotation axes at a predetermined angle θ or more. In a rotated state (that is, in an opened state), a matching surface that connects a boundary line 72a between the stopper B7a and the body part body 3a and a boundary line 72b between the stopper B7b and the body part body 3b that is symmetrical to the boundary line 72a. The length W of the line segment perpendicular to 8 is designed to be shorter than the length Hy of the through hole 11 (see FIG. 1C).

  That is, in the joint 1, the stoppers B7a and 7b are in a state in which the pair of joint structural bodies 2a and 2b are rotated from the closed state by a predetermined angle θ or more with the joint end edges 71a and 71b as rotation axes (open state). ), And the stoppers B7a and 7b of the other joint constituent bodies 2a and 2b to be paired with each other, the joint mounting target through-hole 11 can be inserted.

  Moreover, the connection part 13 which connects joint structure 2a, 2b is comprised by the thin plate shape, and is joined with the joint edge 71a, 71b of joint structure 2a, 2b so that rotation is possible at both ends. That is, the joint 1 is the joining edge 71a, 71b positioned at the lower part of the joint structure 2a, 2b and is parallel to the alignment surface 8 and perpendicular to the vertical direction of the joint structure 2a, 2b. Is configured to be coupled to the connecting portion 13 so as to be rotatable.

  Further, the connecting portion 13 is configured to be bendable on a center line C (see FIG. 2) parallel to the rotation shaft (joining end edges 71a and 71b) located in the middle between the both end edges. That is, the connecting portion 13 is bent at the center line C in a state where the joint 1 is closed, and is disposed at a position sandwiched between the joint constituent bodies 2a and 2b.

  More specifically, as shown in FIG. 3C, the connecting portion 13 is in a state where the joint 1 is closed, and the joint components 2a, 2b are based on the joining edges 71a, 71b of the joint components 2a, 2 as shown in FIG. It arrange | positions so that it may protrude toward the hollow part of the trunk | drum 3 from the inner wall of this.

  Specifically, in this embodiment, the distance L from the end edge of the connecting portion 13 to be joined to the joining end edges 71a and 71b to the center line C is the distance between the joining end edges 71a and 71b to the body part structures 3a and 3b. The length is set shorter than the length D up to the upper end, and in the closed state, the center line C of the connecting portion 13 is arranged at a position where the upper end of the body portion 3 does not protrude. That is, the connecting portion 13 is accommodated in the hollow portion of the trunk portion 3.

  However, the present invention is not limited to this embodiment, and the distance L may be set sufficiently longer than the length D. When the connecting portion 13 is configured as described above, the connecting portion 13 is disposed so as to protrude from the upper ends of the joint components 2a and 2b in a closed state.

In addition, the connection part 13 of a present Example comprised in this way is used as a holding part, when a user removes the joint 1 attached to the through-hole 11 from the through-hole 11. FIG.
Then, the attachment aspect to the cardboard 9 of the joint 1 is demonstrated using FIG. When the joint 1 is attached to a plurality of cardboards 9 in which the through holes 11 are combined, first, the joint 1 is opened. And as shown to Fig.3 (a), each front-end | tip of stopper B7a, 7b is simultaneously inserted in a series of through-holes 11. FIG.

  In this state, when the connecting portion 13 is grasped with a finger and the joint 1 is pushed downward, as shown in FIG. 3 (b), the body portions 3 a and 3 b or the stoppers A 5 a and 5 b are connected to the cardboard 9. Since the interference occurs, a force in the closing direction acts on the joint 1, and the joint 1 is deformed in the closing direction. Then, along with this deformation, the tips of the stoppers B 7 a and 7 b go under the cardboard 9.

  In this state, when the joint 1 is further pushed downward and the joint 1 is deformed until it is in a closed state as shown in FIG. 3C, the body portion 3 of the joint 1 is inserted into the series of through holes 11. The stoppers A5a and 5b and the stoppers B7a and 7b are disposed at positions where the corrugated cardboard 9 as a member to be coupled is sandwiched.

  That is, in this state, the body 3 restrains the movement of the cardboard 9 in the lateral direction perpendicular to the vertical direction, and the stoppers A5a, 5b and the stoppers B7a, 7b move up and down the plurality of cardboards 9 stacked together. The movement of the cardboard 9 in the vertical direction is restrained. Accordingly, the plurality of cardboards 9 are connected to each other. In this state, the attachment of the joint 1 of this embodiment to the cardboard 9 is completed.

  Moreover, the removal operation | work from the corrugated board 9 of the joint 1 can be implement | achieved in the reverse procedure to the procedure of attaching the joint 1. FIG. Specifically, in the state of FIG. 3C, the connecting portion 13 is grasped with a finger and pulled up. If it does in this way, as shown in FIG.3 (b), the joint 1 will be in the state opened gradually, and will move upwards along with it. When the joint 1 is in a state of being opened by a predetermined angle θ or more, as shown in FIG. 3A, the stoppers B7a and 7b are disposed at positions where the stoppers B7a and 7b can be pulled out from the through hole 11, so It can be removed from the cardboard 9.

  FIG. 4 is a view showing a procedure of assembling or disassembling the cardboard box 21 configured by being connected by the joint 1 described above. When the cardboard box 21 is assembled, the upper case 17 and the bottom case 19 constituting the cardboard pole box 21 may be connected by the procedure shown in FIGS. 4 (a), (b), and (c).

  More specifically, when assembling the cardboard box 21, first, as shown in FIG. 4A, an upper case 17, a bottom case 19, and a predetermined number of joints 1 are prepared. Each of the upper case 17 and the bottom case 19 has a configuration in which a through hole 18 is provided at a connecting portion.

  Next, the upper case 17 is fitted into the bottom case 19, and the upper case 17 and the bottom case 19 are overlapped so that the through holes 18 are aligned with each other at the connecting portion. Then, the joint 1 is inserted into a series of the through holes overlapped with each other (see FIG. 4B).

  Further, from this state, the joint 1 is pushed into the through hole 18. Then, the joint 1 is inserted into the series of through holes 18 to be in a closed state, and the upper case 17 and the bottom case 19 are sandwiched. As described above, when the joint 1 is inserted into the through hole 18, the upper case 17 and the bottom case 19 are connected to each other (see FIG. 4C), and the cardboard box 21 is assembled. Further, the cardboard box 21 can be disassembled if the procedure is performed in the reverse order of assembly.

  Although the joint 1 of the present embodiment has been described above, in the present embodiment, the joint 1 is fitted into the through hole 11 (through hole 18) and fixed by a pushing operation instead of rotation, and the stoppers A5a and 5b are fixed. The stoppers B7a and 7b prevent the joint 1 from being removed from the through hole 11 (through hole 18), and sandwich the corrugated cardboard 9 (the upper case 17 and the bottom case 19) as the members to be joined. 9 (upper case 17 and bottom case 19) are connected.

  Therefore, according to the present embodiment, the coupled member can be coupled more firmly and unintentionally than the conventional technology of attaching the joint to the coupled member by rotation and coupling the coupled member as in the prior art. The detachment of the joint 1 can be prevented. That is, in the present embodiment, the joint 1 is configured so that the joint 1 is not detached from the cardboard 9 (the upper case 17 and the bottom case 19) unless there is a pulling operation. The joint does not rotate due to the interference and does not come off the corrugated cardboard 9 (the upper case 17 and the bottom case 19).

  In addition, according to the present embodiment, since the method of connecting the members to be coupled is not employed by utilizing the weight of the members to be coupled, the joints can be used regardless of the orientation of the corrugated cardboard 9 (corrugated cardboard box 21). 1 does not come off and exhibits an effect superior to the conventional one in terms of bonding force.

  Moreover, since the joint 1 of a present Example becomes a structure which can form each part integrally by shaping | molding, the manufacturer does not need to fit together several components and comprise the joint 1. FIG. That is, according to the present embodiment, each part of the joint 1 can be integrally formed by molding, so that many defective products are not generated in terms of dimensional accuracy, and the yield of products can be improved. .

  Further, according to the joint 1 of the present embodiment, the cardboard 9 (the upper case 17 and the bottom case 19) as the members to be joined are stacked, and the joint 1 is pushed into the series of through holes 11 (through holes 18). It is possible to attach the joint 1 to the coupled member and connect the coupled member, and there is no need to perform the complicated operation such as lifting the coupled member and attach the joint 1 to the coupled member as in the prior art. Therefore, according to the present embodiment, the operation of connecting the members to be coupled using the joint 1 can be simplified, and the troublesomeness of the operation can be reduced as compared with the prior art.

  In this embodiment, when the joint 1 is removed from the cardboard 9 (the upper case 17 and the bottom case 19), the joint parts 2a and 2b are lifted from the stoppers B7a and 7b to the stoppers A5a and 5b. Thus, the connecting portion 13 is configured as a gripping portion so that the joint structural bodies 2a and 2b can be efficiently rotated in the opening direction. Therefore, according to the present embodiment, the removal work of the joint 1 can be easily performed, and when the joint 1 is sent for recycling, the work can be efficiently performed.

  In particular, in this embodiment, the connecting portion 13 is accommodated in the hollow portion with the body portion 3 having a hollow shape and closed so that the connecting portion 13 does not protrude outside. When the connecting portion 13 is protruded to the outside, the connecting portion 13 may interfere with the outside, and an upward force may be applied to cause the joint 1 to come off. In this embodiment, the connecting portion 13 is Since it fits in the hollow part of the part 3, it can prevent that such a problem generate | occur | produces.

  Moreover, this invention can take a various aspect, without being limited to the said Example. For example, in the above-described embodiment, the joint 1 in which the stoppers A5a and 5b are thin-walled has been described. However, as shown in FIG. 5, the joint 1 may be configured to include stoppers A5a ′ and 5b ′ having thicknesses. Good.

  If the stoppers A5a and 5b are made thin as in the above embodiment, the upper case 17 and the bottom case 19 are connected using the joint 1 so that the stoppers B7a and 7b are located inside the cardboard box 21. Thus, when the cardboard boxes 21 are arranged for transportation or the like, it is possible to prevent the cardboard boxes 21 from interfering with each other by the stoppers A5a and 5b, but conversely, the strength at the portions of the stoppers A5a and 5b is weak. Become.

  On the other hand, as shown in FIG. 5, if the joint 1 has a structure having stoppers A5a ′ and 5b ′ having thicknesses, the stopper A5a ′ has a drawback that the cardboard boxes 21 interfere with each other with the stoppers A5a and 5b. , 5b ′ can be strengthened, and the joint 1 can be prevented from being unintentionally detached from the cardboard box 21 by being distorted.

  Moreover, in the said Example, although the joint structure 2a, 2b was connected with the connection part 13, as shown in FIG. 6 without using the connection part 13, the joint structure 2a, 2b is connected directly. You may make it do. As shown in FIG. 6, when the joint 1 is configured, there is no connecting portion 13 that functions as a gripping portion, so that it is difficult to remove the joint 1 after it is attached to the cardboard 9 (corrugated cardboard box 21). In addition, unintentional detachment of the joint 1 from the cardboard 9 (cardboard box 21) can be prevented.

  In addition, as shown in FIGS. 7A and 7B, the connecting portion 13 may be provided with a pair of holes 23 symmetrically with the center line C interposed therebetween. Thus, if the hole 23 is provided in the connection part 13, it will arrange | position the hole 23 so that it may face in the direction perpendicular | vertical to the up-down direction of the joint structure 2a, 2b in the closed state. And the hole 23 becomes non-slip, and the joint can be easily attached and detached.

  In the above description, the joint 1 is made of paper. However, the joint of the present invention is not limited to paper, and may be made of metal or resin. However, it is preferable from the viewpoint of environmental protection that the material of the joint is the same as the material of the member to be coupled, because separation during recycling is unnecessary.

FIG. 3 is an explanatory diagram showing a configuration of a joint 1. 2 is a developed perspective view of the joint 1. FIG. It is explanatory drawing which showed the attachment or detachment aspect of the joint. It is a figure which shows the procedure of the assembly or decomposition | disassembly of the cardboard box 21 comprised by couple | bonding with the joint 1. FIG. It is a front view of the joint of the modification which made the stopper A thick. It is a front view of the joint of the modification which is not provided with a connection part. It is a perspective view of the joint of the modification which provided the hole in the connection part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Joint, 2a, 2b ... Joint structure, 3 ... Body part, 3a, 3b ... Body part structure, 5a, 5b, 5a ', 5b' ... Stopper A, 7a, 7b ... Stopper B, 8 ... Matching surface , 9 ... Corrugated cardboard, 11, 18 ... Through hole, 13 ... Connecting part, 17 ... Upper case, 19 ... Bottom case, 21 ... Cardboard box, 23 ... Hole, 71a, 71b ... Joining edge, 72a, 72b ... Boundary line

Claims (7)

A plurality of coupled members having through-holes, wherein the plurality of coupled members overlapped with each other are coupled such that the through-holes of each coupled member are aligned with the through-holes of the other coupled members. A joint for
Comprising a pair of joint components disposed across a predetermined alignment surface;
Each joint structure includes a body part constituting the body part of the joint together with the other joint structure body that forms a pair, a stopper A provided at an upper end of the body part body, and A stopper B provided at the lower end, and is configured to be coupled to the other joint structure so as to be rotatable about an axis parallel to the alignment surface and perpendicular to the vertical direction at the lower part of the stopper B;
The pair of joint components is in a state in which the joint components are arranged close to each other so that the vertical direction is parallel to the alignment surface with the alignment surface interposed therebetween (hereinafter referred to as “closed state”). The length of the vertical direction is longer than the total length of the through-hole formed by overlapping the plurality of members to be coupled to each other, and the shape of the cross section perpendicular to the vertical direction is formed by the one set of the body structure. The outer shape of the barrel portion that can be inserted into the through-hole is configured, and the plurality of coupled members are sandwiched from above and below by the stopper A and the stopper B in a state where the barrel portion is inserted into the through-hole. The plurality of members to be coupled are connected,
Further, the stopper B of each joint structure is opened from the closed state by rotating the pair of joint structures by a predetermined angle or more about the axis in the direction in which the stopper A leaves the alignment surface. The joint is configured to be able to be inserted into the through hole together with the stopper B of the other joint constituent body to be paired. 2. A gripping portion provided at a connection portion of the joint structure, and extending upward from the connection portion so as to protrude from the joint structure in the closed state. Listed joints. The grip portion is configured as a connecting member that couples the pair of joint components, and is connected to the joint component so as to be rotatable about the axis at each of both end edges, and is further sandwiched between the end edges. The joint structure having a bending center that can be bent along the axis at a point that is a predetermined distance away from one end edge, and bent at the bending center in the closed state. The joint according to claim 2, wherein the joint protrudes from the side. In the closed state, the joint has a hollow shape with an upper portion opened from the body portion, and a part or all of the grip portion is accommodated in the hollow portion. The joint according to claim 2 or claim 3. The joint according to any one of claims 2 to 4, wherein the grip portion is provided with a hole.   The joint according to any one of claims 1 to 5, wherein the joint is made of paper. A box formed by connecting a plurality of members,
A through-hole is provided in the connection portion of each member,
Each member is overlapped with the other member to be connected in a state where the through holes are combined,
Each said member is pinched | interposed by the joint in any one of the Claims 1-6 penetrated by the series of through-holes of the state of being combined, It is connected with the said other member. Box.

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