Coupling component and packaging box

Abstract

To provide a coupling component that simplifies the operation when being removed from a plurality of coupled members.SOLUTION: A coupling component 10 includes an insertion part 11 that is inserted into through holes provided in each of coupled members when the multiple coupled members are stacked together, flange parts 12 that are formed on the upstream side of the insertion part in an insertion direction A and abut against the edge of the through holes of coupled members located at the most upstream in the insertion direction when the insertion part is inserted, and clamping parts 13A, 13B that clamp the multiple coupled members between the insertion part and the flange part when the insertion part is inserted. The coupling component also has elastic support parts 15A, 15B that support the clamping parts so that they can be displaced in a direction perpendicular to the insertion direction, and a removal force receiving part 14 that is connected to the elastic support parts and receives a removal force in a removal direction B opposite to the insertion direction when the insertion part is removed from each through hole. The removal force received by the removal force receiving part causes the elastic support parts to elastically deform, and the clamping parts to be displaced inwardly of the through holes.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a coupling component and a packaging box.

Background Art

[0002] Conventionally, there is known a coupling component including an insertion portion inserted into each through hole provided in each of a plurality of members to be coupled in a state where the plurality of members to be coupled are overlapped with each other, a flange portion formed on the upstream side in the insertion direction of the insertion portion and abutting on the edge of the through hole of the member to be coupled at the most upstream in the insertion direction when the insertion portion is inserted into each through hole, and a clamping portion that clamps the plurality of members to be coupled between the flange portion when the insertion portion is inserted into each through hole.

[0003] For example, Patent Document 1 discloses a packaging box in which a pallet with a tray and an upper box installed on the upper part thereof are coupled by a packaging stopper (coupling component). In this packaging box, through holes formed in the upper side wall of the pallet with a tray and through holes formed in the lower part of the upper box are arranged so as to overlap each other, and the pallet with a tray and the upper box are coupled by inserting the packaging stopper into both through holes. This packaging stopper includes a base member having a first cylindrical portion (insertion portion), a jaw portion (flange portion), and a hook member (clamping portion), and a key member having a second cylindrical portion and a locking claw, which is connected to the side of the base member by a connecting piece.

[0004] At the time of coupling, first, the first cylindrical portion of the base member is inserted into both of the above-described through holes, and then the key member is rotated and folded back toward the base member side by bending the connecting piece, and the second cylindrical portion of the key member is inserted into the inside of the first cylindrical portion of the base member. As a result, the hook member disposed inside the first cylindrical portion of the base member is pushed out by the second cylindrical portion of the key member and protrudes in a state substantially parallel to the jaw portion of the base member, and the locking claw of the key member engages with an engaged portion formed on the inner wall of the first cylindrical portion of the base member. As a result, with the key member locked to the base member, the side wall of the pallet with a tray and the upper box are clamped between the flange portion and the hook member, and the pallet with a tray and the upper box are coupled.

[0005] On the other hand, when removing, by performing an operation of pinching a predetermined portion of the key member with the operator's finger, the key member is elastically deformed, and the locking claw of the key member disengages from the engaged portion of the base member. Thereafter, while pinching the key member with the finger, by performing an operation of pulling out the second cylindrical portion of the key member from the first cylindrical portion of the base member, the hook member is retracted inside the first cylindrical portion of the base member. And finally, by performing an operation of pulling out the first cylindrical portion of the base member from the through hole, the packaging stopper is removed, and the connection between the pallet with tray and the upper box is released.

Summary of the Invention

Problems to be Solved by the Invention

[0006] Conventional coupling parts have had the problem that the operations for removing or attaching the coupling part from a plurality of members to be coupled are complicated.

Means for Solving the Problems

[0007] In order to solve the above-described problems, the present invention provides an insertion portion inserted into each through hole provided in each member to be coupled in a state where a plurality of members to be coupled are overlapped with each other, a flange portion formed on the upstream side in the insertion direction of the insertion portion, which abuts on the edge of the through hole of the member to be coupled at the most upstream in the insertion direction when the insertion portion is inserted into each through hole, and a sandwiching portion that sandwiches the plurality of members to be coupled between the flange portion when the insertion portion is inserted into each through hole, and is a coupling part having an elastic support portion that supports the sandwiching portion so as to be displaceable in a direction orthogonal to the insertion direction, and a take-out force receiving portion that is connected to the elastic support portion and receives a take-out force in a take-out direction opposite to the insertion direction when the insertion portion is taken out from each through hole, and is configured such that the elastic support portion is elastically deformed by the take-out force received by the take-out force receiving portion and the sandwiching portion is displaced inward of the through hole.

Effects of the Invention

[0008] According to the present invention, the operations for removing and attaching coupling components from a plurality of components to be coupled can be simplified.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

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Figure 8

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Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

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Figure 16

Figure 17

Figure 18

DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In this embodiment, a packaging box for packaging a product such as an image forming apparatus such as a copying machine, a facsimile machine, or a printer as an object to be packaged will be described as an example. However, as long as it is a packaging box in which a plurality of members to be joined are joined by a coupling component, there is no limitation on the object to be packaged.

[0011] Fig. 1(a) is a perspective view showing the packaging box in this embodiment. Fig. 1(b) is a perspective view showing, in broken lines, the product or the like accommodated inside the packaging box in this embodiment. The packaging box 1 of this embodiment is composed of an outer box 20 for packaging so as to cover and protect the periphery of the product 100 other than the bottom surface side, and a pallet 30 for holding the product 100 packaged in this outer box 20 and transporting it by a forklift (not shown) or the like. The packaging box 1 places the bottom surface side of the product 100 packaged in the outer box 20 on the pallet 30 to hold the product 100. The outer box 20 and the pallet 30 may be bound and fixed with a binding member such as a band so as not to collapse. The packaging box 1 configured in this way is placed on the floor surface with the pallet 30 on the lower side, or is loaded and transported.

[0012] The outer box 20 is made of packaging materials such as cardboard (including plastic cardboard), and is formed in a rectangular box shape with an open bottom. The internal volume of this outer box 20 is formed to be large enough to accommodate the product 100 together with a cushioning material 101 such as styrofoam in order to prevent damage to the product 100.

[0013] The pallet 30 is disposed on the bottom surface side of the product 100 and is formed with a predetermined thickness so as to include an installation surface member 31 for installation on the floor surface or the like and an upper surface member 32 on which the product 100 is disposed, one above the other. A fork hole 33 is formed between the installation surface member 31 and the upper surface member 32. This fork hole 33 is used when supporting and moving the pallet 30 by inserting the fork of a forklift.

[0014] On the pallet 30, a side wall surface portion 34 that protrudes upward so as to surround the upper surface 32a is formed at the edge of the upper surface 32a of the upper surface member 32 that holds the bottom surface side of the product 100. When the outer box 20 for packaging the product 100 is set on the upper surface 32a of the upper surface member 32, the inner surface of the side wall surface portion 34 of the pallet 30 faces the outer surface near the bottom of the side wall surface portion 21 of the outer box 20. That is, the side wall surface portion 34 of the pallet 30 and the side wall surface portion 21 of the outer box 20 are arranged so as to overlap each other. Note that the outer surface of the side wall surface portion 34 of the pallet 30 may be configured to face the inner surface near the bottom of the side wall surface portion 21 of the outer box 20.

[0015] As shown in FIG. 1, through holes 34a are formed in the side wall surface portion 34 of the pallet 30. Further, through holes 21a are also formed in the vicinity of the bottom of the side wall surface portion 21 of the outer box 20 (the portion that overlaps the side wall surface portion 34 of the pallet 30), as shown in FIG. 1. These through holes 21a and 34a are arranged at positions that overlap each other when the outer box 20 is properly set on the upper surface 32a of the upper surface member 32 (when the side wall surface portion 21 of the outer box 20 and the side wall surface portion 34 of the pallet 30 are properly overlapped).

[0016] The coupling component 10 is attached to the overlapping through holes 21a and 34a. As a result, the side wall surface portion 21 of the outer box 20, which is the member to be coupled, and the side wall surface portion 34 of the pallet 30 are connected (coupled) to each other by the coupling component 10.

[0017] Next, the coupling component 10 in the present embodiment will be described. FIG. 2 is a perspective view of the coupling component 10 of the present embodiment as viewed from the front side. FIG. 3 is a perspective view of the coupling component 10 of the present embodiment as viewed from the back side. FIG. 4 is a cross-sectional view of a state in which the side wall surface portion 21 of the outer box 20 and the side wall surface portion 34 of the pallet 30 are coupled by the coupling component 10.

[0018] The coupling component 10 of the present embodiment is a molded product made of a resin material such as a hard synthetic resin, but there are no particular restrictions on the material, manufacturing method, etc. For example, the coupling component 10 may be a molded product made of a paper material, that is, a material derived from plant fibers. In particular, by forming the coupling component 10 from a paper material, a coupling component 10 that is excellent in recyclability and environmentally friendly can be realized.

[0019] The coupling component 10 of the present embodiment is an integrally molded product made of a resin material, and includes a trunk portion 11 as an insertion portion, a flange portion 12, claw portions 13A and 13B as sandwiching portions, and a take-out piece 14 as a take-out force receiving portion.

[0020] The trunk portion 11 is inserted into the through holes 21a and 34a in a state where the side wall surface portion 21 of the outer box 20 and the side wall surface portion 34 of the pallet 30 are overlapped with each other. The trunk portion 11 has a hollow shape with an internal space that is open on the front side. The trunk portion 11 is provided with trunk side wall portions 11a and 11a on both sides of the side surface, a trunk upper wall portion 11b on the upper surface side, a trunk lower wall portion 11c on the lower surface side, and a trunk rear wall portion 11d as an end wall portion on the rear side. The space surrounded by these wall portions 11a to 11d is the internal space of the trunk portion 11.

[0021] The flange portion 12 is arranged so as to capture the edge of the front opening on the front side (the upstream side in the insertion direction A) of the trunk portion 11, and extends away from the front opening in a direction substantially parallel to the plane orthogonal to the insertion direction A from the edge of this front opening. As shown in Fig. 4, when the trunk portion 11 is inserted into the through hole 21a of the side wall surface portion 21 of the outer box 20 and the through hole 34a of the side wall surface portion 34 of the pallet 30, the flange portion 12 abuts against the edge of the through hole 34a of the side wall surface portion 34 of the pallet 30, which is the member to be joined on the front side (the most upstream in the insertion direction A).

[0022] Of the claw portions 13A and 13B, the upper claw portion 13A is formed so as to protrude from near the lateral center of the trunk upper wall portion 11b of the trunk portion 11 toward the back side (the downstream in the insertion direction A). Also, the lower claw portion 13B is formed so as to protrude from near the lateral center of the trunk lower wall portion 11c of the trunk portion 11 toward the back side (the downstream in the insertion direction A). As shown in Fig. 4, in the state where the trunk portion 11 is inserted into the through holes 21a and 34a, the side wall surface portion 21 of the outer box 20 and the side wall surface portion 34 of the pallet 30 are sandwiched between the return surface 13a of the claw portions 13A and 13B and the surface of the flange portion 12. That is, the claw portions 13A and 13B function as a sandwiching portion that sandwiches the side wall surface portion 21 of the outer box 20 and the side wall surface portion 34 of the pallet 30 between the flange portion 12.

[0023] In the present embodiment, a rear opening 11e is formed at the same position in the lateral direction where the claw portions 13A and 13B are provided on the rear wall portion 11d of the main body portion 11, as shown in FIG. 3. Since the main body portion 11, which is a resin molded product, is an elastic member, the two claw portions 13A and 13B are supported so as to be displaceable in the vertical direction (the direction in which the two claw portions 13A and 13B approach each other). That is, in the present embodiment, the portion of the upper wall portion 11b of the main body portion, which is a side wall portion at the same position in the lateral direction where the upper claw portion 13A is provided, functions as an elastic support portion 15A that supports the upper claw portion 13A so as to be displaceable in the direction orthogonal to the insertion direction A (vertical direction). Further, the portion of the lower wall portion 11c of the main body portion, which is a side wall portion at the same position in the lateral direction where the lower claw portion 13B is provided, functions as an elastic support portion 15B that supports the lower claw portion 13B so as to be displaceable in the direction orthogonal to the insertion direction A (vertical direction).

[0024] The extraction piece 14 functions as an extraction force receiving portion that receives an extraction force in the extraction direction B opposite to the insertion direction A when the main body portion 11 is extracted from the through holes 21a and 34a. In the present embodiment, an operator inserts a finger through the front opening of the main body portion 11 and hooks the extraction piece 14, and then pulls out the extraction piece 14 in the extraction direction B with that finger to extract the main body portion 11 from the through holes 21a and 34a. Therefore, in the present embodiment, the pulling force acting on the extraction piece 14 when the extraction piece 14 is pulled out in the extraction direction B with the finger of the operator is the extraction force.

[0025] When the operation of extracting the main body portion 11 from the through holes 21a and 34a is automated by a robot arm, the pulling force acting on the extraction piece 14 when the extraction piece 14 is pulled out in the extraction direction B with the finger portion of the robot arm becomes the extraction force.

[0026] In this embodiment, the upper end portion of the extraction piece 14 is connected to a portion of the main trunk upper wall portion 11b that is at the same lateral position where the upper claw portion 13A is provided, that is, a portion that functions as the elastic support portion 15A that supports the upper claw portion 13A so as to be vertically displaceable. Also, the lower end portion of the extraction piece 14 is connected to a portion of the main trunk lower wall portion 11c that is at the same lateral position where the lower claw portion 13B is provided, that is, a portion that functions as the elastic support portion 15B that supports the lower claw portion 13B so as to be vertically displaceable. That is, the extraction piece 14 is provided so as to connect between the elastic support portion 15A of the upper claw portion 13A and the elastic support portion 15B of the lower claw portion 13B.

[0027] FIG. 5 is an explanatory diagram for explaining the movement of the coupling component 10 when removing the coupling component 10 from the side wall surface portion 21 of the outer box 20 and the side wall surface portion 34 of the pallet 30. In this embodiment, when removing the coupling component 10 from the side wall surface portion 21 of the outer box 20 and the side wall surface portion 34 of the pallet 30, the operator pulls the extraction piece 14 in the extraction direction B with a finger. As a result, as shown in FIG. 5, due to the pulling force (extraction force) F, the vicinity of the vertical center of the extraction piece 14 moves in the extraction direction B. Thereby, forces FA and FB including a displacement force toward the vertical center side of the internal space of the main trunk portion 11 act on the upper end portion and the lower end portion of the extraction piece 14, respectively.

[0028] Due to these forces FA and FB, as shown by the two-dot chain line in FIG. 5, the elastic support portion 15A of the upper claw portion 13A and the elastic support portion 15B of the lower claw portion 13B elastically deform so as to be displaced toward the vertical center side of the internal space of the main trunk portion 11. As a result, the two claw portions 13A and 13B are displaced toward the vertical center side (inside the through holes 21a and 34a) of the internal space of the main trunk portion 11 as shown by the arrow C in FIG. 5. Thereby, the claw portions 13A and 13B that had sandwiched the side wall surface portion 21 of the outer box 20 and the side wall surface portion 34 of the pallet 30 between them retreat inside the through holes 21a and 34a.

[0029] When the operator directly pulls out the extraction piece 14 with a finger in the extraction direction B, the main body 11 is taken out from the respective through holes 21a and 34a in the extraction direction B, the coupling component 10 is removed from the packaging box 1, and the connection between the outer box 20 and the pallet 30 is released.

[0030] Thus, according to the present embodiment, when removing the coupling component 10 from the packaging box 1, by simply pulling out the extraction piece 14 with a finger in the extraction direction B by the operator, a series of operations from the retraction of the claw portions 13A and 13B to the removal of the main body 11 are completed. Therefore, the operation for removing the coupling component 10 from the packaging box 1 is simplified, and the workability of the operator can be improved.

[0031] FIG. 6 is an explanatory diagram for explaining the movement of the coupling component 10 when coupling the side wall surface portion 21 of the outer box 20 and the side wall surface portion 34 of the pallet 30 with the coupling component 10. When coupling the side wall surface portion 21 of the outer box 20 and the side wall surface portion 34 of the pallet 30 with the coupling component 10 of the present embodiment, the operator holds, for example, the edge of the flange portion 12 with a finger and inserts the main body 11 into the respective through holes 21a and 34a in a state where the side wall surface portion 21 of the outer box 20 and the side wall surface portion 34 of the pallet 30 are overlapped with each other.

[0032] At this time, since the claw portions 13A and 13B protrude outside the outer peripheral surface of the main body 11, the inclined surfaces 13b of the claw portions 13A and 13B come into contact with the edge of the through hole 34a of the side wall surface portion 34 of the pallet 30 when the main body 11 is inserted. However, as shown in FIG. 6, when the operator directly pushes the flange portion 12 in the insertion direction A with forces F1 and F1, the contact portion between the inclined surface 13b of the claw portions 13A and 13B and the edge of the through hole 34a slides along the inclined surface 13b, and the elastic support portions 15A of the claw portion 13A and the elastic support portion 15B of the lower claw portion 13B are elastically deformed by the force received from the edge of the through hole 34a. Therefore, the two claw portions 13A and 13B are displaced to positions retracted toward the center in the vertical direction (inside the through holes 21a and 34a) of the internal space of the main body 11 as shown by the two-dot chain line in FIG. 6.

[0033] As a result, the engagement of the claw portions 13A and 13B with the edge of the through hole 34a in the side wall surface portion 34 of the pallet 30 is released. Consequently, when the operator directly pushes the flange portion 12 in the insertion direction A, the base portions 11 are inserted into the through holes 21a and 34a while the claw portions 13A and 13B slide along the inner wall surfaces of the through holes 21a and 34a.

[0034] Then, when the base portion 11 is inserted until the flange portion 12 of the coupling component 10 abuts against the edge of the through hole 34a in the side wall surface portion 34 of the pallet 30, the claw portions 13A and 13B pass through the through holes 21a and 34a. Due to the elastic restoring forces of the elastic support portions 15A of the upper claw portion 13A and the elastic support portions 15B of the lower claw portion 13B, the two claw portions 13A and 13B are displaced outward of the through holes 21a and 34a as indicated by the arrow D in FIG. 6. As a result, the side wall surface portion 21 of the outer box 20 and the side wall surface portion 34 of the pallet 30 are sandwiched between the return surfaces 13a of the claw portions 13A and 13B and the surface of the flange portion 12.

[0035] In this state, the coupling of the side wall surface portion 21 of the outer box 20 and the side wall surface portion 34 of the pallet 30 by the coupling component 10 is completed, and since the return surfaces 13a of the claw portions 13A and 13B are engaged with the edge of the through hole 21a in the side wall surface portion 21 of the outer box 20, prevention of detachment of the coupling component 10 is also achieved.

[0036] Thus, according to the present embodiment, when coupling the side wall surface portion 21 of the outer box 20 and the side wall surface portion 34 of the pallet 30 with the coupling component 10, with only one operation of the operator pushing the flange portion 12 of the coupling component 10 with a finger in the insertion direction A, a series of operations including retraction of the claw portions 13A and 13B, insertion of the base portions 11, and clamping between the claw portions 13A and 13B and the flange portion 12 are completed. Therefore, the operation when coupling with the coupling component 10 is simplified, and the workability of the operator can be improved.

[0037] In addition, the coupling component 10 of the present embodiment does not require the key member 202 that was necessary separately from the base member 201 inserted into the through hole in the conventional packaging fastener 200 as shown in FIG. 18. Therefore, the component projected area when the coupling component 10 is viewed from the front can reduce the area by the amount corresponding to the absence of the key member 202 compared to the conventional packaging fastener 200, and it is possible to achieve a significant reduction in the amount of material used and a reduction in the size of the manufacturing die.

[0038] In the present embodiment, as shown in FIG. 4 and the like, the extraction piece 14 is composed of a convex curved member in the extraction direction B. In this case, when the coupling component 10 is removed, it becomes easier for the operator to hook a finger on the extraction piece 14, improving workability. However, the extraction piece 14 is not limited to such a shape. For example, as shown in FIG. 7, the extraction piece 14 may be a linear member extending in a direction orthogonal to the insertion direction A (here, the vertical direction), which is the extraction piece 14'. Also, for example, as shown in FIG. 8, the extraction piece 14 may be a bent member convex in the extraction direction B, which is the extraction piece 14''.

[0039] Also, in the present embodiment, the connection positions (the upper and lower end portions of the extraction piece 14) where the extraction piece 14 is connected to the elastic support portions 15A and 15B are provided near the center in the insertion direction of the elastic support portions 15A and 15B (the main trunk upper wall portion 11b and the main trunk lower wall portion 11c) as shown in FIG. 4, but it is not limited to this position.

[0040] For example, as shown in FIG. 9, the connection positions (the upper and lower end portions of the extraction piece 14) where the extraction piece 14 is connected to the elastic support portions 15A and 15B may be provided closer to the downstream in the insertion direction A of the elastic support portions 15A and 15B (the main trunk upper wall portion 11b and the main trunk lower wall portion 11c). According to this configuration, when removing the coupling component 10, the force (the displacement forces indicated by reference signs FA and FB in FIG. 5) for displacing the two claw portions 13A and 13B toward the center in the vertical direction (inside the through holes 21a and 34a) of the internal space of the main trunk portion 11 can be reduced. As a result, the force (extraction force) F for pulling the extraction piece 14 when removing the coupling component 10 can be made smaller, improving the workability of the operator.

[0041] On the other hand, for example, the connection positions (the upper and lower ends of the extraction piece 14) where the extraction piece 14 is connected to the elastic support portions 15A and 15B may be provided closer to the upstream side in the insertion direction A of the elastic support portions 15A and 15B (the main trunk upper wall portion 11b and the main trunk lower wall portion 11c). According to this configuration, since the extraction piece 14 can be located at a position close to the front opening of the main trunk portion 11 (the opening on the upstream side in the insertion direction A), when removing the coupling component 10, it is easier for the operator to hook a finger on the extraction piece 14, improving the workability of the operator.

[0042] Also, in the present embodiment, the connection positions (the upper and lower ends of the extraction piece 14) where the extraction piece 14 is connected to the elastic support portions 15A and 15B are provided at overlapping positions that overlap with the claw portions 13A and 13B in the lateral direction. Of course, the connection positions (the upper and lower ends of the extraction piece 14) where the extraction piece 14 is connected to the elastic support portions 15A and 15B may be provided at non-overlapping positions that do not overlap with the claw portions 13A and 13B in the lateral direction. However, by providing at the overlapping positions as in the present embodiment, when removing the coupling component 10, the force (displacement force indicated by reference signs FA and FB in FIG. 5) for displacing the claw portions 13A and 13B toward the central side in the vertical direction (inside the through holes 21a and 34a) of the internal space of the main trunk portion 11 can be made smaller than in the case of providing at non-overlapping positions. As a result, the force (extraction force) F for pulling the extraction piece 14 when removing the coupling component 10 can be made smaller, improving the workability of the operator.

[0043] Also, in the present embodiment, the elastic support portions 15A and 15B that support the claw portions 13A and 13B are integrally formed with other portions of the main trunk upper wall portion 11b and the main trunk lower wall portion 11c which are side wall portions of the main trunk portion 11, but it is not limited thereto. For example, as shown in FIG. 10, the elastic support portions 15A and 15B may be configured to be displaceable independently of other portions of the main trunk portion 11. Specifically, in the example of FIG. 10, separation grooves (elongated holes) 13c extending along the insertion direction A are provided in the main trunk upper wall portion 11b and the main trunk lower wall portion 11c of the main trunk portion 11, and the portions of the main trunk upper wall portion 11b and the main trunk lower wall portion 11c that constitute the elastic support portions 15A and 15B are configured to be displaceable independently of other portions of the main trunk upper wall portion 11b and the main trunk lower wall portion 11c.

[0044] If the elastic support portions 15A and 15B are separated from the other portions of the main trunk upper wall portion 11b and the main trunk lower wall portion 11c in this way, when removing the coupling component 10, compared with the case where the elastic support portions 15A and 15B are integrally formed with the other portions of the main trunk upper wall portion 11b and the main trunk lower wall portion 11c, the force (displacement forces indicated by reference numerals FA and FB in FIG. 5) for displacing the claw portions 13A and 13B toward the vertical center side (inside the through holes 21a and 34a) of the internal space of the main trunk portion 11 can be reduced. As a result, when removing the coupling component 10, the force (removal force) F for pulling the extraction piece 14 can be made small, so that the workability of the operator is improved.

[0045] Also, in the present embodiment, the extraction piece 14 is disposed at the central position of the internal space of the main trunk portion 11 in the lateral direction. However, as shown in FIG. 11, it may be disposed at a position E' shifted from the central position E of the internal space of the main trunk portion 11 in the lateral direction. When the extraction piece 14 is disposed at the central position E of the internal space of the main trunk portion 11 in the lateral direction, the lateral space on the side of the extraction piece 14 in the internal space of the main trunk portion 11 becomes equal on both sides. Therefore, there is a possibility that any of the spaces may be too narrow for the operator to insert a finger when removing the coupling component 10.

[0046] On the other hand, in the example of FIG. 11 where the extraction piece 14 is disposed at a position E' shifted from the central position E of the internal space of the main trunk portion 11 in the lateral direction, as shown in FIG. 12, the lateral length L2 (for example, 1 cm or more) of one side of the lateral space of the extraction piece 14 in the internal space of the main trunk portion 11 can be made longer than the lateral length L1 of the other side. Thereby, since the lateral space on one side of the extraction piece 14 in the internal space of the main trunk portion 11 can be widened, it becomes easier for the operator to insert a finger from the wide space side when removing the coupling component 10, and the workability is improved.

[0047] Also, in the present embodiment, since the return surfaces 13a of the claw portions 13A and 13B and the surface of the flange portion 12 are configured to be parallel to each other, the side wall surface portion 21 of the outer box 20 and the side wall surface portion 34 of the pallet 30, which are parallel to each other, can be sandwiched without a gap. However, in special cases such as when the surfaces of the side wall surface portion 21 of the outer box 20 and the side wall surface portion 34 of the pallet 30 are not parallel to each other, the return surfaces 13a of the claw portions 13A and 13B and the surface of the flange portion 12 may be configured to be non-parallel accordingly.

[0048] Further, in the claw portions 13A and 13B in the present embodiment, when attaching the coupling component 10, an inclined surface 13b is provided so that the claw portions 13A and 13B can smoothly move from the edge of the through hole 34a of the side wall surface portion 34 of the pallet 30 into the through hole 34a. This inclined surface 13b may be a flat surface, but is preferably a curved surface as in the present embodiment. Thereby, when attaching the coupling component 10, the claw portions 13A and 13B can move into the through hole 34a more smoothly, improving workability.

[0049] Also, in the present embodiment, a base back wall portion 11d as an end wall portion is provided on the back side of the base portion 11. However, as shown in FIG. 13, a configuration without the base back wall portion 11d may also be possible. That is, as shown in FIG. 13, the back side of the base portion 11 may be configured to be entirely open. However, by providing the base back wall portion 11d on the back side of the base portion 11, the opening area downstream in the insertion direction A of the base portion 11 becomes smaller or disappears. Therefore, when using the packaging box 1, it is possible to suppress foreign matter from entering the inside of the packaging box 1 from the outside of the packaging box 1 through the internal space of the base portion 11 of the coupling component 10.

[0050] Note that although the entire back side of the main body 11 may be blocked by the main body back wall portion 11d, in that case, the elastic deformation of the portions of the main body upper wall portion 11b and the main body lower wall portion 11c that constitute the elastic support portions 15A and 15B will be inhibited, the displacement of the claw portions 13A and 13B will be inhibited, and there is a risk of reducing workability. Therefore, as in the present embodiment, as shown in FIG. 3, among the back side of the main body 11, the portion located on the downstream side in the insertion direction A of the elastic support portions 15A and 15B is not blocked by the main body back wall portion 11d and is made into a back opening 11e, and it is preferable to block only the other portions with the main body back wall portion 11d.

[0051] Further, as shown in FIG. 4, the main body back wall portion 11d on the back side of the main body 11 is preferably convex in shape on the downstream side in the insertion direction A. According to this, the internal space of the main body 11 formed inside the main body back wall portion 11d can be expanded in the insertion direction. As a result, the space for the operator to put a finger on the back side of the extraction piece 14 becomes wider, so that the operator can easily hook a finger on the extraction piece 14 and the workability is improved.

[0052] Also, as shown in FIG. 14, a pulling piece 16 may be provided as an extension portion extending upstream in the insertion direction A from the extraction piece 14. According to this, when the operator removes the coupling part 10, the coupling part 10 can be removed in the same manner as in the above-described case by pinching the pulling piece 16 with a finger and pulling it in the extraction direction B. Therefore, two types of removal methods, that is, the method of hooking a finger on the extraction piece 14 and removing it and the method of pulling the pulling piece 16 and removing it, can be provided to the operator, and the convenience is improved.

[0053] Also, as shown in FIG. 14, if a non-slip rib 16a is formed on the pulling piece 16 as a non-slip portion, the slipping when the operator pulls the pulling piece 16 can be suppressed.

[0054] Note that the position of the free end of the pulling piece 16 (the position of the end portion on the upstream side in the insertion direction A) may extend upstream in the insertion direction A from the internal space of the main body 11 or may be within the internal space of the main body 11.

[0055] Also, as shown in FIGS. 15 and 16, the entire lateral area on the back side of the main body 11 may be closed by the main body back wall portion 11d. Specifically, when the extraction piece 14 is pushed downstream in the insertion direction A under some external force and the extraction piece 14 is deformed as shown by the two-dot chain line in FIG. 17, the main body back wall portion 11d is formed so as to form a displacement restricting portion 11f that abuts on the extraction piece 14 and restricts the displacement. At this time, as shown in FIGS. 15 and 16, it is preferable to form a back opening 11e at the same position in the lateral direction where the claw portions 13A and 13B are provided. Thereby, as described above, even if the main body back wall portion 11d extending over the entire lateral area is formed as a displacement restricting portion on the back side of the main body 11, the displacement of the claw portions 13A and 13B is less likely to be inhibited by the main body back wall portion 11d.

[0056] According to the configurations of FIGS. 15 to 17, in a situation where the extraction piece 14 is pushed downstream in the insertion direction A and the extraction piece 14 is deformed, the deformed extraction piece 14 abuts (contacts) on the main body back wall portion 11d, thereby suppressing excessive deformation or detachment of the extraction piece 14, or excessive deformation or detachment of the claw portions 13A and 13B connected to the extraction piece 14. For example, in the example of FIGS. 15 to 17, similar to the example of FIG. 14 described above, since the pulling piece 16 protrudes from the internal space of the main body 11, the pulling piece 16 may be pushed downstream in the insertion direction A during transportation of the packaging box 1 or the like, and the extraction piece 14 may be deformed. Even in such a situation, according to the example of FIGS. 15 to 17, the deformed extraction piece 14 abuts on the main body back wall portion 11d, so that excessive deformation or detachment of the extraction piece 14, excessive deformation or detachment of the claw portions 13A and 13B connected to the extraction piece 14, and the like can be suppressed.

[0057] Also, in this embodiment, when the side wall surface portion 21 of the outer box 20 and the side wall surface portion 34 of the pallet 30 are joined by the joining component 10, the operator can complete a series of joining operations with just one operation of pushing the extraction piece 14 or the pulling piece 16 in the insertion direction A with a finger, instead of using the flange portion 12 of the joining component 10. In this operation, according to the configuration shown in FIGS. 15 to 17, when the extraction piece 14 or the pulling piece 16 is pushed in the insertion direction A, as shown by the two-dot chain line in FIG. 17, the extraction piece 14 deforms into a convex state toward the downstream side in the insertion direction A and abuts against the backbone rear wall portion 11d. When the extraction piece 14 deforms to this abutting state, the upper end portion of the extraction piece 14 receives a downward force from the elastic support portion 15A, and the lower end portion of the extraction piece 14 receives an upward force from the elastic support portion 15B. As a result, the convex portion of the extraction piece 14 that has become convex toward the downstream side in the insertion direction A tries to deform in a direction in which it is pushed toward the backbone rear wall portion 11d, but this deformation is blocked by the backbone rear wall portion 11d. Therefore, when the operation of pushing the extraction piece 14 or the pulling piece 16 in the insertion direction A is performed during the joining by the joining component 10, the extraction piece 14 maintains its deformation in the abutting state (two-dot chain line in FIG. 17) where its convex portion abuts against the backbone rear wall portion 11d.

[0058] According to this, after connecting the side wall surface portion 21 of the outer box 20 and the side wall surface portion 34 of the pallet 30 with the connecting component 10, even when an external force in a direction in which the claw portions 13A and 13B retract, such as during the transportation of the packaging box 1, the situation where the connecting component 10 detaches from the packaging box 1 can be suppressed. Specifically, when an external force that retracts such claw portions 13A and 13B is applied, the upper end portion of the extraction piece 14 connected to the upper claw portion 13A and the elastic support portion 15A receives a downward force, and the lower end portion of the extraction piece 14 connected to the lower claw portion 13B and the elastic support portion 15B receives an upward force. As a result, the extraction piece 14, which is in a convex state toward the downstream side in the insertion direction A, tends to deform in a direction in which the convex portion of the extraction piece 14 is pushed toward the base back wall portion 11d. However, since the deformation is blocked by the base back wall portion 11, even when an external force that retracts the claw portions 13A and 13B is applied, the retraction of the claw portions 13A and 13B is suppressed, and the situation where the connecting component 10 detaches from the packaging box 1 is suppressed.

[0059] What has been described above is an example, and specific effects are achieved for each of the following aspects. [Aspect 1] The first aspect is a coupling component 10 including: an insertion part (for example, a trunk part 11) inserted into each through-hole 21a, 34a provided in each of a plurality of members to be coupled (for example, a side wall surface part 21 of an outer box 20 and a side wall surface part 34 of a pallet 30) in a state where the plurality of members to be coupled are overlapped with each other; a flange part 12 formed on an upstream side in an insertion direction A of the insertion part, and abutting against an edge of a through-hole 34a of the most upstream member to be coupled (for example, the side wall surface part 34 of the pallet 30) in the insertion direction when the insertion part is inserted into each through-hole; and a clamping part (for example, claw parts 13A, 13B) that clamps the plurality of members to be coupled between the flange part when the insertion part is inserted into each through-hole. The coupling component 10 further includes elastic support parts 15A, 15B that support the clamping part so as to be displaceable in a direction (for example, a vertical direction) orthogonal to the insertion direction, and a take-out force receiving part (for example, a take-out piece 14) connected to the elastic support part and receiving a take-out force F in a take-out direction B opposite to the insertion direction when the insertion part is taken out from each through-hole. The elastic support part is elastically deformed by the take-out force received by the take-out force receiving part, and the clamping part is configured to be displaced inward of the through-hole. Conventional coupling components are removed from the members to be coupled through three or more operations, that is, an operation of pinching a predetermined portion of a key member with the finger of an operator to release a locking claw, an operation of pulling out the key member from a base member (insertion part) to retract a hook member (clamping part), and finally an operation of pulling out the base member from a through-hole of the member to be coupled. Therefore, when removing, a plurality of operations are required, which is a complicated operation. For example, the workability of an operator who performs the removal is reduced. In the coupling component of this aspect, an insertion portion is inserted into each through-hole provided in each of the plurality of members to be coupled in a state where the plurality of members to be coupled are overlapped with each other, and a plurality of members to be coupled are sandwiched between a flange portion formed on the upstream side in the insertion direction of the insertion portion and a sandwiching portion, thereby coupling the plurality of members to be coupled. In the coupling component of this aspect, the sandwiching portion is supported by an elastic support portion so as to be displaceable in a direction orthogonal to the insertion direction. A take-out force receiving portion that receives a take-out force in the take-out direction (opposite to the insertion direction) (for example, a force with which an operator pulls in the take-out direction with a finger) when the insertion portion is taken out from each through-hole of the plurality of members to be coupled is connected to the elastic support portion. According to this aspect, when the coupling component is removed, the take-out force receiving portion receives the take-out force, so that the elastic support portion connected to the take-out force receiving portion elastically deforms, and thereby the sandwiching portion supported by the elastic support portion is displaced inward of the through-hole. As a result, the sandwiching portion that sandwiches the plurality of members to be coupled between the flange portion retreats inward of the through-hole. Further, since the take-out force received by this take-out force receiving portion is directed in the take-out direction, the insertion portion is taken out from each through-hole of the plurality of members to be coupled by this take-out force. As a result, the coupling component is removed, and the coupling of the plurality of members to be coupled is released. Thus, according to this aspect, when the coupling component is removed, by applying a take-out force in the take-out direction to the take-out force receiving portion, a series of operations from the retreat of the sandwiching portion to the removal of the insertion portion are completed. Therefore, the operation at the time of removal can be simplified. Further, according to this aspect, when attaching the coupling component, by the operation of pushing the insertion portion into the through-hole, the elastic support portion is elastically deformed to move the clamping portion into the through-hole, and then, due to the restoring force of the elastic support portion, the clamping portion is configured to sandwich a plurality of members to be coupled between the clamping portion and the flange portion. According to this, when attaching the coupling component, by a single operation of pushing the insertion portion into the through-hole, a series of operations until the clamping portion sandwiches a plurality of members to be coupled between the clamping portion and the flange portion are completed, so that the operation at the time of attachment can be simplified. Further, the fact that it is completed by such a single operation of pushing the insertion portion into the through-hole simplifies the movement of the device when the attachment operation of the coupling component is automated by a device such as a robot arm, and it can be realized with a relatively inexpensive device.

[0060] [Second Aspect] The second aspect is characterized in that, in the first aspect, the insertion portion has a hollow shape having an internal space, and the output receiving portion for removal is disposed within the internal space. According to this, since at least a part of the output receiving portion for removal is disposed within the internal space of the insertion portion, the coupling component can be made smaller than the case where the entire output receiving portion for removal is disposed outside the internal space of the insertion portion.

[0061] [Third Aspect] The third aspect is characterized in that, in the second aspect, the output receiving portion for removal is disposed at a position E' shifted from the central position E of the internal space in a direction orthogonal to the insertion direction and in a direction orthogonal to the direction in which the clamping portion is displaced inward of the through-hole due to the elastic deformation of the elastic support portion by the removal force (for example, the lateral direction). According to this, since the space on one side of the output receiving portion for removal in the internal space of the insertion portion can be widened, workability can be improved, such as making it easier for an operator to insert a finger from the wide space side when removing the coupling component.

[0062] [Fourth Aspect] In a fourth aspect, in the second or third aspect, the elastic support portion is characterized by constituting side wall portions (for example, a main trunk upper wall portion 11b and a main trunk lower wall portion 11c) of the insertion portion. According to this, the configuration of the coupling component can be simplified.

[0063] [Fifth Aspect] In a fifth aspect, in the fourth aspect, the elastic support portion is characterized by being configured to be displaceably separated independently from other side wall portions of the insertion portion. According to this, when removing the coupling component, the force for displacing the clamping portion can be made smaller compared to the case where the elastic support portion is integrally formed with other portions of the side wall portion of the insertion portion. Therefore, the extraction force received by the extraction force receiving portion when removing the coupling component can be made smaller, and thus workability can be improved.

[0064] [Sixth Aspect] In a sixth aspect, in the fifth aspect, an end wall portion (for example, a main trunk rear wall portion 11d) is formed in the insertion portion so as to block the downstream side in the insertion direction surrounded by the other side wall portions, and the downstream side in the insertion direction of the elastic support portion is not blocked. According to this, the opening area downstream in the insertion direction of the insertion portion becomes smaller or disappears, so that it is possible to suppress foreign matter from passing through the internal space of the main trunk portion of the coupling component when using the coupled member coupled by the coupling component.

[0065] [Seventh Aspect] In a seventh aspect, in the sixth aspect, the end wall portion is characterized by being formed in a convex shape on the downstream side in the insertion direction. According to this, the internal space of the insertion portion formed inside the end wall portion can be expanded in the insertion direction, and the workability when an operator hooks the extraction force receiving portion with a finger and pulls it out in the extraction direction can be improved.

[0066] [Eighth Aspect] In an eighth aspect, in any one of the first to seventh aspects, two or more of the clamping portions are provided, and the extraction force receiving portion is configured to connect between elastic support portions that respectively support the two or more clamping portions. According to this, when removing the coupling component, the extraction force receiving portion receives the extraction force in the extraction direction, so that two or more clamping portions that sandwich a plurality of members to be coupled between the flange portions can be retracted inward of the through hole by one operation. Therefore, in a configuration in which two or more clamping portions are provided, the operation at the time of removal can be simplified.

[0067] [Ninth Aspect] In a ninth aspect, in any one of the first to eighth aspects, the extraction force receiving portion is composed of a linear member (for example, extraction piece 14') extending in a direction orthogonal to the insertion direction (for example, the vertical direction), a curved member convex in the extraction direction (for example, extraction piece 14), or a bent member convex in the extraction direction (for example, extraction piece 14''). According to this, an extraction force receiving portion having a simple shape can be realized, and a coupling component having a simple configuration can be realized.

[0068] [Tenth Aspect] In a tenth aspect, in any one of the first to ninth aspects, the connection position where the extraction force receiving portion is connected to the elastic support portion is provided closer to the downstream in the insertion direction in the elastic support portion. According to this, since the connection position where the extraction force receiving portion is connected to the elastic support portion is close to the clamping portion supported by the elastic support portion, the force for displacing the clamping portion by the extraction force received by the extraction force receiving portion can be reduced. As a result, the extraction force received by the extraction force receiving portion when removing the coupling component can be reduced, and the workability can be improved.

[0069] [Eleventh Aspect] In the 11th aspect, in any one of the 1st to 9th aspects, the connection position where the extraction force receiving portion is connected to the elastic support portion is provided closer to the upstream in the insertion direction in the elastic support portion. According to this, it becomes easy to access the extraction force receiving portion from the outside, and when removing the coupling component, workability can be improved.

[0070] [12th aspect] In the 12th aspect, in any one of the 1st to 11th aspects, the connection position where the extraction force receiving portion is connected to the elastic support portion is in a direction orthogonal to the insertion direction, and in a direction orthogonal to the direction in which the clamping portion is displaced inward of the through hole due to the elastic deformation of the elastic support portion by the extraction force (for example, the lateral direction), and is provided at a position overlapping the clamping portion. According to this, when removing the coupling component, the force for displacing the clamping portion can be made smaller than the case where it is provided at a position not overlapping the clamping portion (non-overlapping position). As a result, the extraction force received by the extraction force receiving portion when removing the coupling component can be made smaller, so that workability can be improved.

[0071] [13th aspect] In the 13th aspect, in any one of the 1st to 12th aspects, the flange portion has a contact surface that contacts the surface of the member to be coupled at the most upstream in the insertion direction when the insertion portion is inserted into each through hole. According to this, surface contact can be made between the member to be coupled at the most upstream in the insertion direction and the flange portion, so that a flange portion that more stably clamps a plurality of members to be coupled with the clamping portion is realized, and a coupling component with a high coupling force can be realized.

[0072] [14th aspect] In the 14th aspect, in any one of the 1st to 13th aspects, the clamping portion has a contact surface (for example, the return surface 13a) that contacts the surface of the member to be coupled at the most downstream in the insertion direction when the insertion portion is inserted into each through hole. According to this, since it is possible to bring the surface into surface contact between the most downstream joined member in the insertion direction and the clamping portion, a clamping portion that more stably clamps a plurality of joined members with respect to the flange portion is realized, and a joining component with a high joining force can be realized.

[0073] [15th Aspect] In the 15th aspect, in any one of the 1st to 14th aspects, the clamping portion is characterized in that a surface (inclined surface 13b) facing the downstream side in the insertion direction is a flat surface or a curved surface inclined with respect to the insertion direction. According to this, when attaching the joining component, the elastic support portion can be elastically deformed by the pushing force for pushing the insertion portion into the through hole, and the clamping portion can be smoothly moved into the through hole, improving workability.

[0074] [16th Aspect] In the 16th aspect, in any one of the 1st to 15th aspects, it is characterized by having an extending portion (for example, pulling piece 16) extending upstream in the insertion direction from the extraction force receiving portion. According to this, since an extraction force can be applied to the extraction force receiving portion by pulling the extending portion, a method of removing the joining component by pulling the extending portion can be provided.

[0075] [17th Aspect] In the 17th aspect, in the 16th aspect, the extending portion is characterized in that an anti-slip portion (for example, rib 16a) is formed thereon. According to this, slipping when pulling the extending portion can be suppressed.

[0076] [18th Aspect] In the 18th aspect, in any one of the 1st to 17th aspects, the joining component is characterized in that it is a molded product made of a resin material. According to this, the joining component can be mass-produced at low cost.

[0077] [19th Aspect] In the 19th aspect, in any one of the 1st to 17th aspects, the coupling component is a molded product made of paper material. According to this, a coupling component excellent in recyclability can be provided.

[0078] [20th aspect] In the 20th aspect, in any one of the 1st to 18th aspects, when the output receiving portion is displaced in the insertion direction by receiving an external force in the insertion direction, there is a displacement restricting portion 11f that abuts against the output receiving portion to restrict the displacement. It is characterized by having. According to this, even in a situation where the output receiving portion is displaced, deformed, etc. by receiving an external force in the insertion direction, the output receiving portion abuts against the displacement restricting portion, so that excessive displacement and deformation of the output receiving portion are suppressed, and the durability of the coupling component is improved. In addition, during the coupling of the coupling component, an external force in a direction in which the clamping portion that sandwiches a plurality of members to be coupled between the flange portions retreats inward of the through hole may be applied, and the coupling component may be unintentionally detached. In this aspect, when an external force for retracting the clamping portion is applied, the output receiving portion connected to the elastic support portion that supports the clamping portion can be configured to receive a force that deforms toward the side that abuts against the displacement restricting portion. With this configuration, even when an external force for retracting the clamping portion is applied during the coupling of the coupling component, the deformation of the output receiving portion due to the external force is blocked by the displacement restricting portion, and as a result, the retraction of the clamping portion is suppressed, and the situation where the coupling component is detached can be suppressed.

[0079] [21st aspect] The 21st aspect is a packaging box 1 composed of a plurality of packaging members (for example, an outer box 20 and a pallet 30), and the plurality of packaging members are coupled by a coupling component according to any one of the 1st to 20th aspects. It is characterized by that. According to this, a packaging box in which the operation for removing the coupling component is simplified can be realized.

Explanation of reference numerals

[0080] 1: Packaging box 10: Coupling component 11: Base part 11a: Base side wall part 11b: Base upper wall part 11c: Base lower wall part 11d: Base rear wall part 11e: Rear opening 12: Flange part 13A: Upper claw part 13B: Lower claw part 13a: Return surface 13b: Inclined surface 14, 14', 14'': Extraction piece 15A, 15B: Elastic support part 16: Pulling piece 16a: Rib 20: Outer box 21: Side wall surface part 21a: Through hole 30: Pallet 31: Installation surface member 32: Upper surface member 32a: Upper surface 33: Fork hole 34: Side wall surface part 34a: Through hole 100: Product 101: Cushioning material A: Insertion direction B: Extraction direction

Prior art documents

Patent documents

[0081]

Patent Document 1

Claims

1. An insertion part inserted into each through hole provided in each of a plurality of joined members in a state where the plurality of joined members are overlapped with each other, a flange part formed on the upstream side in the insertion direction of the insertion part and abutting on the edge of the through hole of the joined member at the most upstream in the insertion direction when the insertion part is inserted into each through hole, a clamping part that clamps the plurality of joined members between the flange part when the insertion part is inserted into each through hole, and is a coupling part, an elastic support part that supports the clamping part so as to be displaceable in a direction orthogonal to the insertion direction, a take-out force receiving part that is connected to the elastic support part and receives a take-out force in a take-out direction opposite to the insertion direction when the insertion part is taken out from each through hole, and has, A coupling part, characterized in that the elastic support part is elastically deformed by the take-out force received by the take-out force receiving part, and the clamping part is displaced inward of the through hole.

2. In the coupling part according to claim 1, the insertion part has a hollow shape having an internal space, the take-out force receiving part is arranged in the internal space, and is a coupling part.

3. In the coupling part according to claim 2, the take-out force receiving part is in a direction orthogonal to the insertion direction and in a direction orthogonal to the direction in which the clamping part is displaced inward of the through hole due to elastic deformation of the elastic support part by the take-out force, and is displaced from the central position of the internal space. A coupling part characterized by being arranged at a position.

4. In the coupling part according to claim 2 or 3, the elastic support part constitutes a side wall part of the insertion part, and is a coupling part.

5. In the coupling part according to claim 4, the elastic support part is configured to be displaceable independently and separately from other side wall parts of the insertion part, and is a coupling part.

6. In the coupling part according to claim 5, an end wall part is formed on the insertion part to block the downstream side in the insertion direction surrounded by the other side wall parts, and the downstream side in the insertion direction of the elastic support part is not blocked, and is a coupling part.

7. In the coupling part according to claim 6, the end wall part is formed in a convex shape on the downstream side in the insertion direction, and is a coupling part.

8. In the coupling part according to any one of claims 1 to 3, two or more clamping parts are provided, The extraction force receiving part is a coupling part characterized in that it is configured to connect between the elastic support parts that support the two or more clamping parts respectively.

9. In the coupling part according to any one of Claims 1 to 3, the extraction force receiving part is a coupling part characterized in that it is composed of a linear member extending in a direction orthogonal to the insertion direction, a curved member convex in the extraction direction, or a bent member convex in the extraction direction.

10. In the coupling part according to any one of Claims 1 to 3, the connection position where the extraction force receiving part is connected to the elastic support part is provided closer to the downstream in the insertion direction in the elastic support part, and is a coupling part characterized by this.

11. In the coupling part according to any one of Claims 1 to 3, the connection position where the extraction force receiving part is connected to the elastic support part is provided closer to the upstream in the insertion direction in the elastic support part, and is a coupling part characterized by this.

12. In the coupling part according to any one of Claims 1 to 3, the connection position where the extraction force receiving part is connected to the elastic support part is in a direction orthogonal to the insertion direction and in a direction orthogonal to the direction in which the clamping part is displaced inward of the through hole due to the elastic deformation of the elastic support part by the extraction force, and is provided at a position overlapping the clamping part, and is a coupling part characterized by this.

13. In the coupling part according to any one of Claims 1 to 3, the flange part has a contact surface that contacts the surface of the most upstream joined member in the insertion direction when the insertion part is inserted into each through hole, and is a coupling part characterized by this.

14. In the coupling part according to any one of Claims 1 to 3, the clamping part has a contact surface that contacts the surface of the most downstream joined member in the insertion direction when the insertion part is inserted into each through hole, and is a coupling part characterized by this.

15. In the coupling part according to any one of Claims 1 to 3, the clamping part is a coupling part characterized in that the surface facing the downstream side in the insertion direction is a plane or a curved surface inclined with respect to the insertion direction.

16. In the coupling part according to any one of Claims 1 to 3, it has an extension part extending upstream in the insertion direction from the extraction force receiving part, and is a coupling part characterized by this.

17. In the coupling part according to Claim 16, The coupling component is characterized in that an anti-slip portion is formed on the extending portion.

18. In the coupling component according to any one of Claims 1 to 3, the coupling component is a molded article made of a resin material.

19. In the coupling component according to any one of Claims 1 to 3, the coupling component is a molded article made of a paper material.

20. In the coupling component according to any one of Claims 1 to 3, the coupling component has a displacement restricting portion that abuts against the extraction force receiving portion when the extraction force receiving portion is displaced in the insertion direction by an external force in the insertion direction to restrict the displacement.

21. A packaging box composed of a plurality of packaging members, wherein the plurality of packaging members are coupled by the coupling component according to any one of Claims 1 to 3.

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