Structure, hollow member structure, and method for manufacturing hollow member structure

Abstract

A structure in which members are fitted together using a fitting structure that allows members to be easily fixed together, a hollow member structure, and a method for manufacturing the hollow member structure are provided. [Solution] The structure disclosed herein has a fitting structure in which a second member having an insert portion is inserted into and fitted with a first member having an insert portion, the inner circumferential surface of the insert portion having a circular cross section perpendicular to the insertion direction of the insert portion, the insert portion being a prism, and when the insert portion is inserted into the insert portion, the insert portion comes into contact with the inner circumferential surface of the insert portion, and upon contact, the insert portion deforms to conform to the shape of the inner circumferential surface of the insert portion, thereby fixing the insert portion within the insert portion. This configuration makes it possible to provide a fitted structure that uses a fitting structure that allows members to be easily fixed together.

Description

[Technical Field]

[0001] The present disclosure relates to a structure, a hollow member structure, and a method for manufacturing a hollow member structure. [Background technology]

[0002] Patent Document 1 discloses an instrument panel reinforcement fixing structure in which a pipe member is inserted into a through hole and then electromagnetically formed to caulk and fix the pipe member to the through hole. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-018608 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the instrument panel reinforcement fixing structure disclosed in Patent Document 1, the diameter of the pipe member is expanded by applying pulse current and the pipe member and the through hole are crimped and fixed, which poses a problem of increased processing costs for the member due to electromagnetic forming.

[0005] The present disclosure has been made in consideration of the above-mentioned problems, and provides a structure in which components are fitted together using a fitting structure that can easily fix components to each other, a hollow member structure, and a method for manufacturing the hollow member structure. [Means for solving the problem]

[0006] The structure according to one embodiment of the present disclosure comprises: A structure having a fitting structure in which a second member having an inserting portion is inserted into and fitted to a first member having an inserted portion, an inner circumferential surface of the inserted portion has a circular cross section perpendicular to the insertion direction of the insertion portion; the insertion portion is a prism, When the inserting portion is inserted into the receiving portion, the inserting portion comes into contact with an inner circumferential surface of the receiving portion, As the insertion portion makes contact, the insertion portion is deformed along the shape of the inner circumferential surface of the inserted portion, thereby fixing the insertion portion within the inserted portion.

[0007] A hollow member structure according to one aspect of the present disclosure includes: A hollow member structure in which a pair of first hollow members spaced apart are connected via a pair of second hollow members spaced apart, the first hollow member has an inserted portion, the second hollow member includes an insert; an inner circumferential surface of the inserted portion has a circular cross section perpendicular to the insertion direction of the insertion portion; the insertion portion is a prism, When the inserting portion is inserted into the receiving portion, the inserting portion comes into contact with an inner circumferential surface of the receiving portion, As the insertion portion makes contact, the insertion portion is deformed along the shape of the inner circumferential surface of the inserted portion, thereby fixing the insertion portion within the inserted portion.

[0008] A method for manufacturing a hollow member structure according to one aspect of the present disclosure includes the steps of: forming inserted portions in the pair of first hollow members; forming insertion portions in the pair of second hollow members; Disposing the pair of first hollow members at a distance from each other; a step of connecting two separate locations of the pair of first hollow members via the second hollow member, an inner circumferential surface of the inserted portion has a circular cross section perpendicular to the insertion direction of the insertion portion; the insertion portion is a prism, When the inserting portion is inserted into the receiving portion, the inserting portion comes into contact with an inner circumferential surface of the receiving portion, As the insertion portion makes contact, the insertion portion is deformed along the shape of the inner circumferential surface of the inserted portion, thereby fixing the insertion portion within the inserted portion. [Effects of the Invention]

[0009] According to the present disclosure, there are provided a structure in which members are fitted together using a fitting structure that allows members to be easily fixed together, a hollow member structure, and a method for manufacturing the hollow member structure. [Brief explanation of the drawings]

[0010] [Figure 1] 1A is a schematic perspective view of a first member having an inserted portion according to an embodiment of the present disclosure, and FIG. 1B is a cross-sectional view perpendicular to the insertion direction of the first member having an inserted portion according to an embodiment of the present disclosure. [Figure 2] 1A is a schematic perspective view of a second member having an insertion portion according to an embodiment of the present disclosure, and FIG. 1B is a cross-sectional view perpendicular to the insertion direction of the second member having an insertion portion according to an embodiment of the present disclosure. [Figure 3] 1A is a schematic perspective view of a structure in which an inserting portion of a second member is inserted into an inserting portion of a first member according to an embodiment of the present disclosure, and FIG. 1B is a cross-sectional view perpendicular to the insertion direction of a structure in which an inserting portion of a second member is inserted into an inserting portion of a first member according to an embodiment of the present disclosure. [Figure 4] 1 is a schematic perspective view of a hollow member structure according to an embodiment of the present disclosure. FIG. [Figure 5] 1 is a flowchart of a method for manufacturing a hollow member structure according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, specific embodiments of the present disclosure will be described in detail with reference to the drawings. However, the present disclosure is not limited to the following embodiments. In addition, the following description and drawings have been simplified appropriately for clarity of explanation.

[0012] <Structure configuration> Fig. 1(a) is a schematic perspective view of a first member having an inserted portion according to an embodiment of the present disclosure, and Fig. 1(b) is a cross-sectional view perpendicular to the insertion direction of the first member having an inserted portion according to an embodiment of the present disclosure.

[0013] The first member 1 has an inserted portion 11 that can be fitted into an inserting portion 21 of the second member 2, which will be described later, and is fitted into the inserting portion 21 of the second member 2. 1(a) and 1(b), the first member 1 has a hollow cylindrical shape, but the shape of the outer circumferential surface of the first member 1 is not particularly limited and may be, for example, a rectangular column, or may have irregularities for combining with other members. Furthermore, by making the shape of the outer circumferential surface the same as that of the main body 20 of the second member 2 (described later), the outer circumferential surface of the structure 3 can be formed flush when the structure 3 is formed. Furthermore, the size of the first member 1 is determined, for example, by the strength and outer shape required for the structure 3 when the first member 1 is fitted with the second member 2 to form the structure 3. Furthermore, the material of the first member 1 is not particularly limited and may be, for example, a metal such as iron, aluminum, steel, or an aluminum alloy.

[0014] The inserted portion 11 is fitted into the inserting portion 21 of the second member 2. The shape of the inner circumferential surface of the inserted portion 11 is circular in cross section perpendicular to the insertion direction. In the example shown in Figures 1(a) and 1(b), the shape of the inner circumferential surface is a perfect circle in cross section. 1(a) and 1(b), the inserted portion 11 is provided so as to penetrate in the insertion direction, but the inserted portion 11 may have a shape that does not penetrate. That is, the inserted portion 11 may be provided as a recess in the first member 1. In that case, the recess depth of the inserted portion 11 only needs to be deep enough to fit with the inserting portion 21, and may be deeper or shallower than the fitting region provided at the tip of the inserting portion 21. Furthermore, the inner diameter of the inserted portion 11 only needs to be large enough to fit with the inserting portion 21, and can be determined depending on the fitting strength.

[0015] Fig. 2(a) is a schematic perspective view of a second member having an insertion portion according to an embodiment of the present disclosure, and Fig. 2(b) is a cross-sectional view perpendicular to the insertion direction of the second member having an insertion portion according to an embodiment of the present disclosure.

[0016] The second member 2 has a main body 20 and an inserting portion 21 that can be fitted into the inserted portion 11 of the first member 1, and is fitted into the inserted portion 11 of the first member 1.

[0017] The main body 20 contacts the insertion portion 21. While the main body 20 is cylindrical in FIGS. 2(a) and 2(b), the shape of the main body 20 is not particularly limited. It may be a rectangular column, or may have projections and recesses for combining with other members. Furthermore, by making the shape of the main body 20 the same as that of the first member 1, the outer peripheral surface of the structure 3 can be formed flush when the structure 3 is formed. Additionally, the main body 20 and the insertion portion 21 may be integrally formed with the same shape, i.e., a rectangular column. The size of the second member 2 is determined, for example, by the strength and outer shape required for the structure 3 when the second member 2 is fitted with the first member 1 to form the structure 3. The second member 2 may also be a hollow member having a through hole. In this case, the position and size of the through hole are not particularly limited, and the through hole may penetrate the insertion portion 21. The material of the second member 2 is not particularly limited, and may be, for example, a metal such as iron, aluminum, steel, or an aluminum alloy.

[0018] The inserting portion 21 is fitted into the inserted portion 11 of the first member 1. The inserting portion 21 is a prism, and the shape of the outer circumferential surface is a polygonal cross section perpendicular to the insertion direction. As described above, the insertion portion 21 may have a through-hole. The size of the insertion portion 21 may be any size that can be fitted into the inserted portion 11, and is determined depending on the fitting strength when fitted. The cross-sectional shape of the insertion portion 21 does not have to be a regular polygon, and may be a polygon with sides of different lengths.

[0019] Furthermore, the number of vertices of the cross-sectional polygon is preferably 10 or less, more preferably 5 to 8, in terms of the fitting strength of the fitting portion. If the number of vertices of the cross-sectional polygon is less than 5, the corners of the insertion portion 21 are more likely to be damaged during fitting. If the number of vertices of the cross-sectional polygon exceeds 10, the amount of deformation of the insertion portion 21 during fitting is reduced, and the fitting strength is likely to be reduced. Figure 3(b) shows, as an example, a case where the cross-sectional polygon of the insertion portion 21 is a regular octagon.

[0020] Fig. 3(a) is a schematic perspective view of a structure in which an inserting portion of a second member is inserted into an inserting portion of a first member according to an embodiment of the present disclosure, and Fig. 3(b) is a cross-sectional view perpendicular to the insertion direction of the structure in which an inserting portion of a second member is inserted into an inserting portion of a first member according to an embodiment of the present disclosure.

[0021] The structure 3 is formed by inserting the inserting portion 21 of the second member 2 into the inserted portion 11 of the first member 1. The size of the structure 3 to be formed is determined by the strength and external shape required for the structure 3. In forming the structure 3, the first member 1 and the second member 2 may be made of different materials.

[0022] Here, at the mating portion of structure 3, the outer peripheral surface of inserting portion 21 comes into contact with the inner peripheral surface of inserted portion 11. At that time, as shown in FIG. 3(b), the corners of the polygonal cross section perpendicular to the insertion direction of inserting portion 21 (i.e., the corners on the outer peripheral surface of inserting portion 21) deform along the shape of the inner peripheral surface of inserted portion 11. Here, as the corners on the outer peripheral surface of inserting portion 21 deform, pressure is applied to inserted portion 11 perpendicular to the insertion direction of inserting portion 21, and the mating portion is fixed.

[0023] It is also preferable that a gap V be formed between the inserted portion 11 and the inserting portion 21 at the mating portion. Forming the gap V at the mating portion has the effect of making it difficult for vibrations, for example, to be transmitted to the second member 2 when the vibrations are applied to the first member 1. From the standpoint of ease of mating, formation of the gap V, etc., it is preferable that the length of the perpendicular line drawn from the axial position of the mating portion to each side of the inserting portion 21 is shorter than the radius of the circular cross section of the inserted portion 11.

[0024] As described above, in the structure according to the embodiment of the present disclosure, the components are fixed to each other by the insertion portion deforming along the inner circumferential surface shape of the inserted portion at the fitting portion. This makes it possible to provide a structure in which the components are fitted together using a fitting structure that can easily fix the components to each other.

[0025] <Configuration of hollow member structure> Next, a hollow member structure according to an embodiment of the present disclosure will be described using Fig. 4. Fig. 4 is a schematic perspective view of a hollow member structure according to an embodiment of the present disclosure. The hollow member structure 4 is configured by connecting first hollow members 51 and 52 with second hollow members 61 and 62. More specifically, the first hollow member 51 and the first hollow member 52 are connected via the second hollow member 61, and the first hollow member 51 and the first hollow member 52 are connected via the second hollow member 62.

[0026] The hollow member structure 4 is used, for example, as a structure to reinforce the frame of an automobile, but its use is not limited thereto. The size and shape of the hollow member structure 4 are determined according to the size and shape of the portion to be reinforced. Therefore, the first hollow members 51, 52 do not have to be parallel, and the second hollow members 61, 62 do not have to be parallel. The first hollow members 51, 52 may have different shapes from each other, and the second hollow members 61, 62 may have different shapes from each other. The material of the hollow member structure 4 is not particularly limited, and is, for example, a metal such as iron, aluminum, steel, or an aluminum alloy.

[0027] In addition, in the hollow member structure 4, the connection portions between the first hollow members 51, 52 and the second hollow members 61, 62 are connected by the fitting structure of the above-mentioned structure 3. Details of the fitting structure are as described above and will be omitted here.

[0028] Furthermore, the first hollow members 51, 52 and the second hollow members 61, 62 all have a hollow structure. For example, the first hollow members 51, 52 and the second hollow members 61, 62 each have a through-hole in the longitudinal direction as a hollow structure. However, the inner diameter of the through-hole may be determined based on the strength, weight, etc. of the hollow member structure 4, and the inner diameter may vary within the member.

[0029] As described above, the hollow member structure according to the embodiment of the present disclosure is configured by connecting a pair of first hollow members with a pair of second hollow members, and the connecting portion is fixed by the insertion portion deforming along the inner circumferential surface shape of the inserted portion. This makes it possible to provide a hollow member structure in which members are fitted together using a fitting structure that can easily fix the members together.

[0030] <Method for manufacturing hollow member structure> Next, a method for manufacturing a hollow member structure according to an embodiment of the present disclosure will be described with reference to Fig. 5. Fig. 5 is a flowchart of the method for manufacturing a hollow member structure according to an embodiment of the present disclosure. The following steps are performed, for example, by a manufacturing device having gripping means for gripping and moving each of the first hollow members 51, 52 and the second hollow members 61, 62.

[0031] First, inserted portions are formed in the pair of first hollow members 51 and 52, respectively (step S1). Subsequently, inserted portions are formed in the pair of second hollow members 61 and 62, respectively (step S2).

[0032] In Figure 5, step S1, which forms inserted portions in a pair of first hollow members 51, 52, is located upstream of step S2, which forms inserted portions in a pair of second hollow members 61, 62, but step S1 may also be located downstream of step S2, or may be performed simultaneously.

[0033] Next, the pair of first hollow members 51, 52 are arranged with a predetermined interval therebetween (step S3). The interval between the first hollow members 51, 52 is not particularly limited, and is determined so that the first hollow members 51, 52 are appropriately connected via the second hollow members 61, 62.

[0034] Next, the pair of first hollow members 51, 52 are connected via the pair of second hollow members 61, 62 (step S4). Here, the connection portions between the pair of first hollow members 51, 52 and the pair of second hollow members 61, 62 are connected and fixed by the fitting structure of the structure 3 described above.

[0035] As described above, in the manufacturing method of a hollow member structure according to an embodiment of the present disclosure, a pair of first hollow members are connected by a pair of second hollow members, and the connecting portion is fixed by deforming the inserting portion along the inner circumferential surface shape of the inserted portion. This provides a manufacturing method of a hollow member structure in which members are fitted together using a fitting structure that can easily fix the members together. [Explanation of symbols]

[0036] 1 First member 11 Inserted part 2 Second member 20 Main Unit 21 Insertion section 3 structure 4 Hollow member structure 51, 52 First hollow member 61, 62 Second hollow member V void

Claims

1. A structure having a fitting structure in which a second member having an inserting portion is inserted into and fitted to a first member having an inserted portion, an inner circumferential surface of the inserted portion has a circular cross section perpendicular to the insertion direction of the insertion portion; the insertion portion is a prism, When the inserting portion is inserted into the receiving portion, the inserting portion comes into contact with an inner circumferential surface of the receiving portion, As a result of the contact, the inserting portion is deformed along the shape of the inner circumferential surface of the inserted portion, whereby the inserting portion is fixed within the inserted portion. structure.

2. The number of vertices of the cross-sectional polygon of the insertion portion perpendicular to the insertion direction is 5 to 8. The structure of claim 1 .

3. After the contact, a gap is formed between the insertion portion and the inserted portion. The structure according to claim 1 or 2.

4. A hollow member structure in which a pair of first hollow members spaced apart are connected via a pair of second hollow members spaced apart, the first hollow member includes an inserted portion, the second hollow member includes an insert; an inner circumferential surface of the inserted portion has a circular cross section perpendicular to the insertion direction of the insertion portion; the insertion portion is a prism, When the inserting portion is inserted into the receiving portion, the inserting portion comes into contact with an inner circumferential surface of the receiving portion, As a result of the contact, the inserting portion is deformed along the shape of the inner circumferential surface of the inserted portion, whereby the inserting portion is fixed within the inserted portion. Hollow member structure.

5. forming insertion portions in the pair of first hollow members; forming insertion portions in the pair of second hollow members; disposing the pair of first hollow members at a distance from each other; a step of connecting two separate locations of the pair of first hollow members via the second hollow member, an inner circumferential surface of the inserted portion has a circular cross section perpendicular to the insertion direction of the insertion portion; the insertion portion is a prism, When the inserting portion is inserted into the receiving portion, the inserting portion comes into contact with an inner circumferential surface of the receiving portion, As a result of the contact, the inserting portion is deformed along the shape of the inner circumferential surface of the inserted portion, whereby the inserting portion is fixed within the inserted portion. A method for manufacturing a hollow member structure.

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