Combination of two parts

Abstract

A two-component coupling structure is provided, wherein a first coupled component and a second coupled component are coupled to each other by a coupling component, thereby realizing a simple structure with a reduced number of components and reducing operation time. The coupling component (13) has a rod-shaped portion (13a) which can be inserted through a through hole (16) provided in at least one of a first overlapping portion (14) obtained by overlapping a first flat portion (11a) and a third flat portion (12a) and a second overlapping portion (15) obtained by overlapping a second flat portion (11b) and a fourth flat portion (12b), and has a non-circular cross-sectional shape, and a first engaging surface (18) and a second engaging surface (19) which abut against the third flat portion and the fourth flat portion from the inside are formed at both ends of the rod-shaped portion as the rod-shaped portion rotates after being inserted through the through hole, and an axial force from the rod-shaped portion acts on the first overlapping portion (14) and the second overlapping portion (15) as the rod-shaped portion rotates by a predetermined angle from an initial position.

Description

Technical Field

[0001] The present invention relates to a joining structure of two components, a first joined component and a second joined component, which are joined to each other by a joining component. The first joined component is formed by joining a first flat plate portion and a second flat plate portion which are parallel to each other by means of a first joining portion, and the second joined component is formed by joining a third flat plate portion and a fourth flat plate portion which abut and overlap with the first flat plate portion and the second flat plate portion from the inside by means of a second joining portion. Background Art

[0002] When two connected members are connected to each other, bolts and nuts are generally used or welding is performed as disclosed in Patent Document 1, for example.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2005-120966

[0004] When bolts and nuts are used as in the past, the number of parts may increase, and the number of working hours may increase. Moreover, when welding is used for joining, the number of working hours may also increase. Summary of the invention

[0005] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a two-member connection structure that can achieve a simple structure with a reduced number of parts and reduce work man-hours.

[0006] In order to achieve the above-mentioned purpose, in the combination structure of two components of the present invention, the first combined component and the second combined component are combined with each other by using a combining component, the first combined component is formed by connecting a first flat plate portion and a second flat plate portion parallel to each other by means of a first connecting portion, and the second combined component is formed by connecting a third flat plate portion and a fourth flat plate portion which are abutted and overlapped with the first flat plate portion and the second flat plate portion from the inside by means of a second connecting portion, and its first feature is that at least one of the first overlapping portion obtained by overlapping the first flat plate portion and the third flat plate portion and the second overlapping portion obtained by overlapping the second flat plate portion and the fourth flat plate portion is provided with a through insertion hole, and the combining component has a rod-shaped portion that can be inserted through the through insertion hole and the rod-shaped portion ... The cross-sectional shape of the rod-shaped portion is non-circular, and a first joint surface abutting against the third flat portion from the inside and a second joint surface abutting against the fourth flat portion from the inside are formed at both ends of the rod-shaped portion as the rod-shaped portion rotates after being inserted into the through-hole. The dimension between the first joint surface and the second joint surface at at least a portion of the rod-shaped portion along the circumferential direction is set to be larger than the dimension between the first overlapping portion and the second overlapping portion in a natural state, and an axial force from the rod-shaped portion can be applied to the first overlapping portion and the second overlapping portion as the rod-shaped portion rotates a specified angle from an initial position, in which the rod-shaped portion is arranged between the first overlapping portion and the second overlapping portion at a position where it remains inserted into the through-hole.

[0007] In addition, in addition to the structure of the first feature, the second feature of the present invention is that the joining surface of the first joining surface and the second joining surface facing the insertion hole when the rod-shaped portion is in the initial position is set with a slope that gradually increases the axial force as the rod-shaped portion rotates from the initial position.

[0008] In addition to the structure of the first or second feature, the third feature of the present invention is that one end of the rod-shaped portion is integrally connected to a first shaft portion with a circular cross-section protruding from the first joining surface, and the first shaft portion is inserted into the insertion hole provided on one of the first overlapping portion and the second overlapping portion.

[0009] In addition to the structure of the third feature, the fourth feature of the present invention is that the first shaft portion has an extension portion extending from the rod-shaped portion to both sides when viewed from the axial direction of the rod-shaped portion, the first shaft portion is formed into a circular cross-section and is inserted into the through insertion hole, the through insertion hole is formed into a shape having a rod-shaped portion insertion allowing portion and an extension portion receiving portion, the rod-shaped portion insertion allowing portion is a shape corresponding to the cross-sectional shape of the rod-shaped portion, and the extension portion receiving portion is connected to the rod-shaped portion insertion allowing portion in a manner that receives the extension portion and supports the extension portion so that it can rotate.

[0010] In addition to the structure of the fourth feature, the fifth feature of the present invention is that the other end of the rod-shaped portion is integrally connected to a second shaft portion with a circular cross-section that is coaxial with the first shaft portion and protrudes from the second joint surface, and an shaft portion receiving hole that can receive the second shaft portion is provided on the other side of the first overlapping portion and the second overlapping portion.

[0011] In addition to the fifth characteristic structure, the sixth characteristic of the present invention is that the inner surface of the shaft portion receiving hole is formed in a shape that contacts with the outer surface of the second shaft portion and supports the second shaft portion in a rotatable manner.

[0012] In addition to any one of the third to sixth features, the present invention has a seventh feature in that the first shaft portion is coaxial with the rod-shaped portion and is integrally connected to one end of the rod-shaped portion.

[0013] Furthermore, in addition to any one of the structures of the first to seventh features, the eighth feature of the present invention is that the first coupled component and the second coupled component are formed in a shape such that the first connecting portion and the second connecting portion abut against or are closely opposed to each other in a coupled state in which the first coupled component and the second coupled component are coupled by means of the coupling components.

[0014] According to the first feature of the present invention, while the first and second joint surfaces at both ends of the rod-shaped portion that is inserted through the insertion hole and arranged between the third flat plate portion and the fourth flat plate portion are in sliding contact with the third flat plate portion and the fourth flat plate portion, and while the rod-shaped portion is rotated at a predetermined angle from the initial position, an axial force acts from the rod-shaped portion on the overlapping portion of the first flat plate portion and the third flat plate portion and the overlapping portion of the second flat plate portion and the fourth flat plate portion, and the first flat plate portion and the third flat plate portion are frictionally engaged with the second flat plate portion and the fourth flat plate portion, respectively. Therefore, the first coupled component and the second coupled component can be coupled by a simple coupling operation that is realized by using only a small number of components of the coupling component, thereby achieving improved operating efficiency. Moreover, since torque management is not required, there will be no difference due to the operator. In addition, there is a rod-shaped portion between the overlapping portion of the first flat plate portion and the third flat plate portion and the overlapping portion of the second flat plate portion and the fourth flat plate portion, thereby being able to form a stronger structure that can withstand the compressive force acting between the two overlapping portions.

[0015] According to the second feature of the present invention, a joint surface facing the insertion hole when the rod-shaped portion is in the initial position is set with a slope that increases the axial force successively as the rod-shaped portion rotates from the initial position. Therefore, when the slope is set, the joint surface of the first joint surface and the second joint surface facing the insertion hole when the rod-shaped portion is in the initial position is set with a slope that increases the axial force successively as the rod-shaped portion rotates from the initial position. Therefore, the joint surface with the slope set can be prevented from biting into the periphery of the insertion hole due to the rotation of the rod-shaped portion from the initial position, and the rod-shaped portion can be rotated smoothly.

[0016] According to the third feature of the present invention, the first shaft portion with a circular cross-section protruding from the first joining surface is inserted into the insertion hole, thereby preventing the rod-like portion from being pulled out in a direction perpendicular to the length direction of the rod-like portion when the rod-like portion is arranged between the first overlapping portion and the second overlapping portion.

[0017] According to the fourth feature of the present invention, the first shaft portion has an extension portion extending from the rod-shaped portion to both sides and is formed into a circular cross-section, and the insertion hole for inserting the first shaft portion is shaped with a rod-shaped portion insertion allowing portion and an extension portion receiving portion, the rod-shaped portion insertion allowing portion is a shape corresponding to the cross-sectional shape of the rod-shaped portion, and the extension portion receiving portion is connected to the rod-shaped portion insertion allowing portion in a manner of receiving the extension portion and supporting the extension portion so as to be rotatable, so that the insertion hole enables the rod-shaped portion to be inserted therethrough and the first shaft portion to be supported so as to be rotatable, thereby preventing the first shaft portion from shaking in the insertion hole and achieving stable axial alignment of the first shaft portion.

[0018] According to the fifth feature of the present invention, a second shaft portion with a circular cross-section which is coaxial with the first shaft portion and protrudes from the second joint surface is integrally connected to the other end of the rod-shaped portion, and the shaft portion receiving hole provided on the other side of the first overlapping portion and the second overlapping portion receives the second shaft portion, thereby more reliably preventing the rod-shaped portion from being pulled out in a direction at right angles to the length direction of the rod-shaped portion 13a when the rod-shaped portion 13a is arranged between the first overlapping portion and the second overlapping portion.

[0019] According to the sixth feature of the present invention, the second shaft portion is supported by the shaft portion receiving hole so as to be rotatable in such a manner that its outer surface contacts the inner surface of the shaft portion receiving hole, thereby preventing the second shaft portion from shaking in the shaft portion receiving hole and achieving stable axial alignment of the second shaft portion.

[0020] According to the seventh aspect of the present invention, the first shaft portion is coaxial with the rod-shaped portion, so that eccentricity of the rod-shaped portion can be prevented and the axial force from the rod-shaped portion can be made to act evenly on the first overlapping portion and the second overlapping portion.

[0021] Furthermore, according to the eighth feature of the present invention, in a combined state where the first combined component and the second combined component are combined using the combining component, the first connecting portion and the second connecting portion abut against each other or are closely opposed to each other, thereby being able to suppress the shaking of the first combined component and the second combined component in the rotation direction centered on the rod-shaped portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a perspective view of the first coupled member, the second coupled member, and the coupling member in a state where the coupling member is in an initial position.

[0023] Figure 2 It is an exploded perspective view of the first coupled member, the second coupled member, and the coupling member.

[0024] Figure 3 (A) is a top view of the first coupled component and the second coupled component before the coupling component is inserted through the coupling component. Figure 3 (B) is a top view showing a state where the coupling component is inserted through the first coupled component and the second coupled component. Figure 3 (C) is a plan view showing a state in which the first coupled member and the second coupled member are coupled by the coupling member.

[0025] Figure 4 (A) is along Figure 3 The cross-sectional view of line 4A-4A, Figure 4 (B) is along Figure 3 A cross-sectional view of line 4B-4B.

[0026] Figure 5 yes Figure 2 An enlarged side view in the direction of arrow 5.

[0027] Description of symbols

[0028] 11: 1st coupled component; 11a: 1st flat plate portion; 11b: 2nd flat plate portion; 11c: 1st connecting portion; 12: 2nd coupled component; 12a: 3rd flat plate portion; 12b: 4th flat plate portion; 12c: 2nd connecting portion; 13: coupling component; 13a: rod-shaped portion; 13b: 1st shaft portion; 13ba: extension portion; 13c: 2nd shaft portion; 14: 1st overlapping portion; 15: 2nd overlapping portion; 16: insertion hole; 16a: rod-shaped portion insertion allowing portion; 16b: extension portion receiving portion; 17: shaft portion receiving hole; 18: 1st joining surface; 19: 2nd joining surface. DETAILED DESCRIPTION

[0029] Refer to the attached Figure 1 to Figure 5 The embodiments of the present invention are described first. Figure 1 and Figure 2In the embodiment, the first coupled component 11 and the second coupled component 12 are coupled by a coupling component 13. The first coupled component 11 is formed by coupling the first and second flat plate portions 11a and 11b, which are parallel to each other, by means of a first coupling portion 11c, and is formed to have a substantially U-shaped cross-sectional shape. Furthermore, the second coupled component 12 is formed by coupling the third flat plate portion 12a and the fourth flat plate portion 12b, which are in contact with and overlap the first and second flat plate portions 11a and 11b from the inside, by means of a second coupling portion 12c, and is formed to have a substantially U-shaped cross-sectional shape. Furthermore, the first coupled component 11 and the second coupled component 12 are formed in a shape in which the first coupling portion 11c and the second coupling portion 12c are in contact with each other or are closely opposed to each other in a coupled state in which these coupled components 11 and 12 are coupled by means of the coupling component 13.

[0030] At least one of the first overlapping portion 14 obtained by overlapping the first flat portion 11a and the third flat portion 12a and the second overlapping portion 15 obtained by overlapping the second flat portion 11b and the fourth flat portion 12b is provided with a through-hole 16. In this embodiment, the first overlapping portion 14 is provided with the through-hole 16. That is, the first flat portion 11a and the third flat portion 12a are penetrated with through holes of the same shape in a manner that cooperates with each other to form the through-hole 16. Moreover, the other of the first overlapping portion 14 and the second overlapping portion 15 is provided with a shaft receiving hole 17. In this embodiment, the second overlapping portion 15 is provided with the shaft receiving hole 17. That is, the second flat portion 11b and the fourth flat portion 12b are penetrated with through holes of the same shape in a manner that cooperates with each other to form the shaft receiving hole 17.

[0031] Refer to Figure 3 and Figure 4 The coupling member 13 has a rod-shaped portion 13a which can be inserted through the insertion hole 16 and has a non-circular cross-sectional shape. In the embodiment, the rod-shaped portion 13a is formed to have an elliptical cross-sectional shape. In addition, a first joint surface 18 abutting against the inner surface of the third flat plate portion 12a and a second joint surface 19 abutting against the inner surface of the fourth flat plate portion 12b are formed at both ends of the rod-shaped portion 13a as the rod-shaped portion 13a rotates after being inserted through the insertion hole 16.

[0032] At one end of the rod-shaped portion 13a, a first shaft portion 13b having a circular cross section protruding from the first joint surface 18 is coaxial with the rod-shaped portion 13a and integrally connected to one end of the rod-shaped portion 13a, and the first shaft portion 13b is inserted through the insertion hole 16. The first shaft portion 13b has an extension portion 13ba extending from the rod-shaped portion 13a to both sides when viewed from the axial direction of the rod-shaped portion 13a, so as to be formed into a circular cross section, and the insertion hole 16 is formed in a shape having a rod-shaped portion insertion allowing portion 16a and a pair of extension portion receiving portions 16b, the rod-shaped portion insertion allowing portion 16a having a shape corresponding to the cross-sectional shape of the rod-shaped portion 13a, and the pair of extension portion receiving portions 16b having a shape connected to both sides of the rod-shaped portion insertion allowing portion 16a in a manner that the extension portion 13ba is received and supported so as to be rotatable.

[0033] In addition, the second shaft portion 13c with a circular cross section protruding from the second joint surface 19 is coaxially connected to the first shaft portion 13b and integrally connected to the other end of the rod-shaped portion 13a, and the second shaft portion 13c is received in the shaft portion receiving hole 17 provided in the second overlapping portion 15. Moreover, the inner surface of the shaft portion receiving hole 17 is formed in a circular shape so as to contact the outer surface of the second shaft portion 13c and support the second shaft portion 13c so as to be rotatable.

[0034] The combination component can change its posture between an initial position and a rotation end position. In the initial position, Figure 3 (B) and Figure 4 As shown in (A), the rod-shaped portion 13a is arranged between the first overlapping portion 14 and the second overlapping portion 15 at a position where the rod-shaped portion 13a is inserted through the insertion hole 16, and the rotation end position is as shown in FIG. Figure 3 (C) and Figure 4 As shown in (B), after rotating from the initial position at a specified angle (90 degrees in this embodiment), the first bonding surface 18 abuts against the third flat plate portion 12a in a manner that the contact area gradually increases with the rotation from the initial position, and the second bonding surface 19 abuts against the fourth flat plate portion 12b in a manner that the contact area does not change from the initial position to the rotation end position.

[0035] The dimension between the first joining surface 18 and the second joining surface 19 at at least a portion of the rod-shaped portion 13a along the circumferential direction is set to be larger than the dimension between the first overlapping portion 14 and the second overlapping portion 15 in a natural state and is capable of applying axial force from the rod-shaped portion 13a to the first overlapping portion 14 and the second overlapping portion 15 as the rod-shaped portion 13a rotates a specified angle from the initial position. In the initial position, the rod-shaped portion 13a is arranged between the first overlapping portion 14 and the second overlapping portion 15 while remaining inserted into the insertion hole 16.

[0036] The dimension between the first joint surface 18 and the second joint surface 19 varies in the circumferential direction, and the joint surface of the first joint surface 18 and the second joint surface 19 at the position facing the insertion hole 16 when the rod-shaped portion 13a is in the initial position is provided with an inclination. Figure 3 (B) and Figure 4 As shown in (A), the first joint surface 18 is provided with an inclination, which enables an axial force to be applied to the first overlapping portion and the second overlapping portion as the rod-shaped portion 13a rotates from the initial position, as shown in FIG. Figure 5 As shown, the axial force increases gradually as the rod-shaped portion 13a rotates from the initial position. That is, the first joint surface 18 is formed as an inclined surface, and the inclined surface forms an angle α with respect to the virtual plane VP perpendicular to the rod-shaped portion 13a in such a manner that the dimension between the first joint surface 18 and the second joint surface 19 increases gradually as the rod-shaped portion 13a rotates from the initial position toward the direction opposite to the rotation direction 20 when the rod-shaped portion 13a rotates toward the rotation end position side.

[0037] Next, the function of this embodiment is described. At least one of the first overlapping portion 14 obtained by overlapping the first flat portion 11a and the third flat portion 12a and the second overlapping portion 15 obtained by overlapping the second flat portion 11b and the fourth flat portion 12b (in this embodiment, the first overlapping portion 14) is provided with a through-hole 16. The coupling member 13 has a rod-shaped portion 13a that can be inserted through the through-hole 16 and has a non-circular cross-sectional shape. As the rod-shaped portion 13a rotates after being inserted through the through-hole 16, the first joining surface 18 that abuts against the inner surface of the third flat portion 12a and the first joining surface 18 that abuts against the inner surface of the fourth flat portion The second joining surface 19 abutting the inner surface of 12b is formed at both ends of the rod-shaped portion 13a, and the size between the first joining surface 18 and the second joining surface 19 at least a portion of the rod-shaped portion 13a along the circumferential direction is set to be larger than the size between the first overlapping portion 14 and the second overlapping portion 15 in a natural state, and as the rod-shaped portion 13a rotates a specified angle from the initial position, the axial force from the rod-shaped portion 13a can be applied to the first overlapping portion 14 and the second overlapping portion 15. In the initial position, the rod-shaped portion 13a is arranged between the first overlapping portion 14 and the second overlapping portion 15 while maintaining a state of being inserted through the insertion hole 16.

[0038] Therefore, after being inserted into the insertion hole 16, while the first engaging surface 18 and the second engaging surface 19 at both ends of the rod-shaped portion 13a arranged between the third flat portion 12a and the fourth flat portion 12b are brought into sliding contact with the third flat portion 12a and the fourth flat portion 12b, when the rod-shaped portion 13a is rotated at a specified angle from the initial position, an axial force acts from the rod-shaped portion 13a on the first overlapping portion 14 and the second overlapping portion 15, and the first flat portion 11a and the third flat portion 12a are frictionally engaged with the second flat portion 11b and the fourth flat portion 12b, respectively, so that the first coupled component 11 and the second coupled component 12 can be coupled by a simple coupling operation using only a small number of components of the coupling component 13, thereby improving the working efficiency. Moreover, torque management is not required, so there will be no differences due to the operator. In addition, there is a rod-shaped portion 13a between the first overlapping portion 14 obtained by abutting and overlapping the first flat portion 11a and the third flat portion 12a and the second overlapping portion 15 obtained by abutting and overlapping the second flat portion 11b and the fourth flat portion 12b, thereby achieving a stronger structure that can withstand the compressive force acting between the two overlapping portions 14 and 15.

[0039] In addition, the first joining surface 18 of the first joining surface 18 and the second joining surface 19, which faces the insertion hole 16 when the rod-shaped portion 13a is in the initial position, is set with an inclination that gradually increases the axial force as the rod-shaped portion 13a rotates from the initial position. Therefore, the first joining surface 18 set with the inclination can be prevented from biting into the periphery of the insertion hole 16 due to the rotation of the rod-shaped portion 13a from the initial position, and the rod-shaped portion 13a can be smoothly rotated.

[0040] In addition, one end of the rod-shaped portion 13a is integrally connected to a first shaft portion 13b with a circular cross-section protruding from the first joint surface 18, and the first shaft portion 13b is inserted through the insertion hole 16, thereby preventing the rod-shaped portion 13a from being pulled out in a direction perpendicular to the length direction of the rod-shaped portion 13a when the rod-shaped portion 13a is arranged between the first overlapping portion 14 and the second overlapping portion 15.

[0041] Moreover, the first shaft portion 13b has an extension portion 13ba extending from the rod-shaped portion 13a to both sides when viewed from the axial direction of the rod-shaped portion 13a. The first shaft portion 13b is formed into a circular cross-section and is inserted into the through-hole 16. The through-hole 16 is formed into a shape having a rod-shaped portion insertion allowing portion 16a and an extension portion receiving portion 16b. The rod-shaped portion insertion allowing portion 16a is a shape corresponding to the cross-sectional shape of the rod-shaped portion 13a, and the extension portion receiving portion 16b is connected to the rod-shaped portion insertion allowing portion 16a in a manner of receiving the extension portion 13ba and supporting the extension portion 13ba so as to be rotatable. Therefore, the through-hole 16 can realize the through-insertion of the rod-shaped portion 13a, and can support the first shaft portion 13b so as to be rotatable, thereby preventing the first shaft portion 13b from shaking in the through-hole 16 and realizing stable axial alignment of the first shaft portion 13b.

[0042] In addition, a second shaft portion 13c with a circular cross-section that is coaxial with the first shaft portion 13b and protrudes from the second joint surface 19 is integrally connected to the other end of the rod-shaped portion 13a, and the second overlapping portion 15, which is the other of the first overlapping portion 14 and the second overlapping portion 15, is provided with a shaft receiving hole 17 that can accommodate the second shaft portion 13c. Therefore, it is possible to more reliably prevent the rod-shaped portion 13a from being pulled out in a direction at right angles to the length direction of the rod-shaped portion 13a when the rod-shaped portion 13a is arranged between the first overlapping portion 14 and the second overlapping portion 15.

[0043] In addition, the inner surface of the shaft receiving hole 17 is formed to contact the outer surface of the second shaft portion 13c and support the second shaft portion 13c in a rotatable shape, thereby preventing the second shaft portion 13c from shaking in the shaft receiving hole 17, thereby achieving stable axial alignment of the second shaft portion 13c.

[0044] Moreover, the first shaft portion coaxial with the second shaft is coaxial with the rod-shaped portion 13a and is integrally connected to one end of the rod-shaped portion 13a, thereby preventing eccentricity of the rod-shaped portion 13a and allowing the axial force from the rod-shaped portion 13a to be evenly applied to the first overlapping portion and the second overlapping portion.

[0045] Furthermore, the first coupled component 11 and the second coupled component 12 are formed so that when these coupled components 11, 12 are coupled with the aid of the coupling component 13, the first connecting portion 11c and the second connecting portion 12c are in contact with each other or are closely opposed to each other, thereby suppressing the shaking of the first coupled component 11 and the second coupled component 12 in the rotation direction centered on the rod-shaped portion 13a.

[0046] As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, Various design changes are possible without departing from this invention described in a claim.

Claims

1. A two-component combination structure, wherein a first combined component (11) and a second combined component (12) are combined with each other by a combining component (13), wherein the first combined component (11) is formed by combining a first flat plate portion (11a) and a second flat plate portion (11b) parallel to each other by means of a first connecting portion (11c), and the second combined component (12) is formed by combining a third flat plate portion (12a) and a fourth flat plate portion (12b) which are in contact with and overlap the first flat plate portion (11a) and the second flat plate portion (11b) from the inside by means of a second connecting portion (12c), characterized in that: At least one of a first overlapping portion (14) formed by overlapping the first flat portion (11a) and the third flat portion (12a) and a second overlapping portion (15) formed by overlapping the second flat portion (11b) and the fourth flat portion (12b) is provided with a through insertion hole (16). The coupling member (13) has a rod-shaped portion (13a) which can be inserted through the insertion hole (16) and has a non-circular cross-sectional shape. As the rod-shaped portion (13a) is inserted into the insertion hole (16), a first joint surface (18) abutting against the third flat plate portion (12a) from the inside and a second joint surface (19) abutting against the fourth flat plate portion (12b) from the inside are formed at both ends of the rod-shaped portion (13a). The dimension between the first joint surface (18) and the second joint surface (19) at least a portion of the rod-shaped portion (13a) along the circumferential direction is set to be larger than the dimension between the first overlapping portion (14) and the second overlapping portion (15) in a natural state so that an axial force from the rod-shaped portion (13a) can be applied to the first overlapping portion (14) and the second overlapping portion (15) as the rod-shaped portion (13a) rotates by a predetermined angle from an initial position in which the rod-shaped portion (13a) is arranged between the first overlapping portion (14) and the second overlapping portion (15) while being inserted through the insertion hole (16). One end of the rod-shaped portion (13a) is integrally connected to a first shaft portion (13b) having a circular cross-section protruding from the first joint surface (18), the first shaft portion (13b) having a protruding portion (13ba) protruding from the rod-shaped portion (13a) to both sides when viewed from the axial direction of the rod-shaped portion (13a), and the first shaft portion (13b) is inserted through the insertion hole (16) provided in one of the first overlapping portion (14) and the second overlapping portion (15). The insertion hole (16) provided in one of the first overlapping portion (14) and the second overlapping portion (15) comprises a rod-shaped portion insertion allowing portion (16a) and an extension portion receiving portion (16b), wherein the rod-shaped portion insertion allowing portion (16a) is in a shape corresponding to the cross-sectional shape of the rod-shaped portion (13a), and the extension portion receiving portion (16b) protrudes from both sides of the rod-shaped portion insertion allowing portion (16a) in a shape corresponding to the cross-sectional shape of the extension portion (13ba), and receives the extension portion (13ba), and the extension portion receiving portion (16b) makes the arc-shaped peripheral portion contact the outer peripheral surface of the first shaft portion (13b), and supports the first shaft portion (13b) to be rotatable.

2. The combination structure of two components according to claim 1, characterized in that: Of the first joint surface (18) and the second joint surface (19), the joint surface (18) facing the insertion hole (16) when the rod-shaped portion (13a) is in the initial position is set with a slope that gradually increases the axial force as the rod-shaped portion (13a) rotates from the initial position.

3. The combination structure of two components according to claim 1 or 2, characterized in that: The other end of the rod-shaped portion (13a) is integrally connected to a second shaft portion (13c) coaxial with the first shaft portion (13b) and protruding from the second joint surface (19) and having a circular cross-section. The other of the first overlapping portion (14) and the second overlapping portion (15) is provided with a shaft portion receiving hole (17) capable of receiving the second shaft portion (13c).

4. The combination structure of two components according to claim 3, characterized in that: The inner surface of the shaft portion receiving hole (17) is formed in a shape that contacts the outer surface of the second shaft portion (13c) and supports the second shaft portion (13c) to be rotatable.

5. The combination structure of two components according to claim 1 or 2, characterized in that: The first shaft portion (13b) is coaxial with the rod-shaped portion (13a) and is integrally connected to one end of the rod-shaped portion (13a).

6. The combination structure of two components according to claim 1 or 2, characterized in that: The first coupled component (11) and the second coupled component (12) are formed in such a shape that the first connecting portion (11c) and the second connecting portion (12c) abut against each other or are closely opposed to each other in a coupled state in which the first coupled component (11) and the second coupled component (12) are coupled by means of the coupling component (13).

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