Manufacturing method of the bonded body

Abstract

To provide a technology which enables improvement of shear strength in a joint body in which multiple members are fixedly joined by using fixtures.SOLUTION: A joint body, in which multiple members are fixedly joined, includes: the multiple members; and fixtures. Through holes which communicate with each other in an overlapping state are formed at the multiple members. The fixture includes: a shaft part which may be inserted into the through holes; and a first sandwiching part and a second sandwiching part which are respectively provided at both sides in an axial direction of the shaft part and used to sandwich the multiple members. Further, the fixture is arranged so that the shaft part is inserted into the through holes and the first sandwiching part and the second sandwiching part sandwich the multiple members, having looseness in an axial direction of the through holes.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a joined body in which a plurality of members are fixedly joined. [Background technology]

[0002] Fasteners such as rivets are known that penetrate multiple components and clamp these components together. Such fasteners are used for both movable joints, which are joints that form a movable mechanism between multiple components, and fixed joints, which are joints that fix multiple components together. When a fastener is used for movable joints, the fastener is placed with a gap between it and the multiple components to allow relative displacement between the multiple components. On the other hand, when a fastener is used for fixed joints, the fastener is placed with a gap between it and the multiple components to clamp the multiple components together, as described in Patent Document 1, for example, in order to minimize relative displacement between the multiple components. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2021-154377 Summary of the Invention [Problem to be solved by the invention]

[0004] A fixed joint using a fixture can be used as an alternative to welding, for example, but the fixed joint using a fixture may have lower shear strength than welding.

[0005] One aspect of the present disclosure provides a technique for improving the shear strength of a joined body in which a plurality of members are fixedly joined using a fastener. [Means for solving the problem]

[0006] One aspect of the present disclosure is a joined body in which multiple members are fixedly joined, comprising the multiple members and a fastener. The multiple members have through holes formed in them that communicate with each other when they are stacked. The fastener has a shaft portion that can be inserted into the through hole, and a first clamping portion and a second clamping portion that are provided on both sides of the shaft in the axial direction and are used to clamp the multiple members. The fastener is also arranged so that the shaft portion is inserted into the through hole, and the first clamping portion and the second clamping portion clamp the multiple members with play in the axial direction of the through hole.

[0007] With this configuration, the fastener has some play in the axial direction of the through-hole, making it difficult for the fastener to be sheared, thereby improving the shear strength of the joined body.

[0008] In one aspect of the present disclosure, the fastener may be a rivet. In one embodiment of the present disclosure, at least one of the plurality of members may have a tensile strength of 780 MPa or more.

[0009] In one aspect of the present disclosure, the plurality of members may be fixedly joined by a plurality of joints. At least one of the joints may use a fastener with play. With this configuration, it is possible to suppress relative displacement between the plurality of members.

[0010] Another aspect of the present disclosure is a method for manufacturing a bonded body, the method comprising: inserting a shaft portion of a fixing component having a shaft portion and a first clamping portion through a through hole of a plurality of stacked components; and forming a second clamping portion on the shaft portion of the fixing component inserted through the through hole on a side opposite to the first clamping portion that clamps the plurality of components. The second clamping portion is formed at a position such that a gap is provided between at least one of the plurality of components, between the plurality of components and the first clamping portion, and between the plurality of components and the second clamping portion.

[0011] With this configuration, the fastener provided in the joined body can have some play in the axial direction of the through-hole, thereby improving the shear strength of the joined body.

[0012] In another aspect of the present disclosure, the second clamping unit may be formed with spacer members disposed between the plurality of members, between the plurality of members and the first clamping unit, and on at least one of the opposite sides of the first clamping unit and the plurality of members. The spacer members may be removed after the second clamping unit is formed.

[0013] According to this configuration, a desired amount of play in the axial direction of the through hole can be provided to the fastener provided to the joined body by a relatively simple method.

[0014] In another aspect of the present disclosure, the second clamping portion may be formed by plastic deformation of the shaft portion of the fixing component. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 2 is a schematic perspective view of a bonded body. [Figure 2] FIG. 2 is a cross-sectional view taken along line II-II of FIG. [Figure 3] Fig. 3A is a schematic cross-sectional view for explaining the insertion step, and Fig. 3B is a schematic cross-sectional view showing the state subsequent to Fig. 3A in the insertion step. [Figure 4] Fig. 4A is a schematic cross-sectional view for explaining a crimping step, Fig. 4B is a schematic cross-sectional view showing a state subsequent to Fig. 4A in the crimping step, and Fig. 4C is a schematic cross-sectional view showing a state subsequent to Fig. 4B in the crimping step. [Figure 5] Fig. 5A is a schematic cross-sectional view for explaining a removal step, Fig. 5B is a schematic cross-sectional view showing a state subsequent to Fig. 5A in the removal step, and Fig. 5C is a schematic cross-sectional view showing a state subsequent to Fig. 5B in the removal step. [Figure 6] Fig. 6A is a schematic diagram showing the second joint when an external force is applied that causes the overlapping position of the first member and the second member to shift, and Fig. 6B is a schematic diagram showing a state in which the fixing tool is sheared at the second joint. [Figure 7]Fig. 7A is a schematic diagram showing the first joint when an external force is applied that displaces the overlapping position of the first member and the second member, and Fig. 7B is a schematic diagram showing the state of the first joint when an external force is applied that displaces the overlapping position of the first member and the second member, subsequent to Fig. 7A. [Figure 8] FIG. 10 is a schematic cross-sectional view showing a modified example of the spacer member. [Figure 9] 10A and 10B are schematic cross-sectional views showing a modified example of the crimping step. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, exemplary embodiments of the present disclosure will be described with reference to the drawings. [1. Composition of the zygote] 1 shows a schematic structure as a joined body 1 to illustrate a joining structure of a first member 2A and a second member 2B in a body part for a vehicle. The joined body 1 is a structure in which the first member 2A and the second member 2B are fixedly joined. "Fixed joining" refers to joining that fixes multiple members together.

[0017] The first member 2A and the second member 2B are plate-shaped members. The first member 2A and the second member 2B are made of high-tensile steel material with high tensile strength. The first member 2A and the second member 2B may be made of high-tensile steel material with a tensile strength of 340 MPa or more (so-called high-tensile steel), or may be made of high-tensile steel material with a tensile strength of 780 MPa or more (so-called ultra-high-tensile steel). The first member 2A and the second member 2B of this embodiment are made of high-tensile steel material with a tensile strength of 1470 MPa.

[0018] The first member 2A and the second member 2B are fixedly joined by a plurality of joints. The joints are portions for fixedly joining the first member 2A and the second member 2B. For example, when metal members are joined together, the members may be fixedly joined by welding (i.e., the joints are formed by welding). However, when welding high-tensile steel materials such as the first member 2A and the second member 2B, it may be necessary to adjust the welding conditions to prevent weld cracks. Therefore, in the joined structure 1, a fastener 4 is used to fixedly join the first member 2A and the second member 2B, as shown in FIGS. 1 and 2 as the first joint 3A and the second joint 3B. The fastener 4 is provided to penetrate the first member 2A and the second member 2B and is configured to be able to clamp the first member 2A and the second member 2B.

[0019] 2, through holes 21a and 21b are formed in the first member 2A and the second member 2B, respectively. These through holes 21a and 21b form a through hole 22 that communicates with the first member 2A and the second member 2B when they are stacked together. In this embodiment, the through hole 22 is a circular hole with a constant diameter in the axial direction.

[0020] The fixture 4 has a shaft portion 41 , a first clamping portion 42 , and a second clamping portion 43 . The shaft portion 41 is a portion having a rod-like outer shape. The shaft portion 41 is configured to be insertable into the through hole 22. The shaft portion 41 of this embodiment has a cylindrical outer shape, and its outer diameter is formed to be one size or more smaller than the diameter of the through hole 22. In other words, when the shaft portion 41 is inserted into the through hole 22, a gap is provided between the shaft portion 41 and the inner surface of the through hole 22.

[0021] The first clamping portion 42 and the second clamping portion 43 are portions for clamping the overlapping first member 2A and second member 2B. The first clamping portion 42 and the second clamping portion 43 are provided on both sides of the shaft portion 41 in the axial direction. The first clamping portion 42 and the second clamping portion 43 are formed to a size that does not allow them to pass through the through hole 22. "Not passing through the through hole 22" as used here means that they do not pass through the through hole 22 from one side to the other side in the axial direction of the through hole 22. In this embodiment, the first clamping portion 42 and the second clamping portion 43 are formed to a size that covers the opening of the through hole 22 when viewed along the axial direction of the shaft portion 41.

[0022] One type of fastener 4 is, for example, a rivet. A rivet is a member that joins the first member 2A and the second member 2B by forming one of the first clamping portion 42 and the second clamping portion 43 (for example, the second clamping portion 43) through plastic deformation. In this embodiment, a blind rivet, which joins the first member 2A and the second member 2B by operating only from one side in the overlapping direction of the first member 2A and the second member 2B, is used as the fastener 4. The blind rivet used as the fastener 4 in this embodiment is made of stainless steel (SUS). The tensile strength of the blind rivet is lower than the tensile strength of the first member 2A and the second member 2B.

[0023] The fastener 4 is arranged so that the shaft 41 is inserted into the through-hole 22 and the first clamping portion 42 and the second clamping portion 43 clamp the first member 2A and the second member 2B. When the fastener 4 is used to firmly join the first member 2A and the second member 2B, as in the joined body 1, the fastener 4 is usually arranged so as to clamp the overlapping first member 2A and the second member 2B without leaving any gap between them. This is to maintain a state in which the first member 2A and the second member 2B are in close contact with each other and do not move.

[0024] In the joined body 1, the fasteners 4 constituting the second joint 3B are also arranged to sandwich the overlapping first member 2A and second member 2B. That is, the fasteners 4 constituting the second joint 3B are arranged such that the first clamping portion 42 and the second clamping portion 43 are spaced apart from each other between the first clamping portion 42 and the first member 2A, between the first member 2A and the second member 2B, and between the second member 2B and the second clamping portion 43.

[0025] In contrast, the fastener 4 constituting the first joint 3A is arranged so that the first clamping portion 42 and the second clamping portion 43 are intentionally spaced apart at least one of between the first clamping portion 42 and the first member 2A, between the first member 2A and the second member 2B, and between the second member 2B and the second clamping portion 43. Comparing the first joint 3A and the second joint 3B, in the first joint 3A, the fastener 4 is intentionally arranged with play P in the axial direction of the through hole 22. In the second joint 3B, the fastener 4 is arranged so that no play occurs in the axial direction of the through hole 22.

[0026] [2. Manufacturing method of bonded body] Next, a description will be given of a method for manufacturing the bonded body 1. Specifically, a description will be given of a method for forming the first bonded portion 3A, which constitutes part of the method for manufacturing the bonded body 1. The method for manufacturing the bonded body 1 includes an insertion step, a crimping step, and a removal step.

[0027] [2-1. Insertion process] The insertion step shown in FIGS. 3A and 3B is a step of inserting the fixing component 5 through the through-hole 22 of the first member 2A and the second member 2B that are superimposed on each other.

[0028] The fixing part 5 is a part for forming the fixing tool 4. In this embodiment, the fixing part 5 is a blind rivet in a state before the second clamping part 43 is formed by plastic deformation. The fixing part 5 has an outer tube part 51 and an inner core part 52.

[0029] The outer cylinder portion 51 is a tubular portion (so-called sleeve) having the above-mentioned shaft portion 41 and first clamping portion 42. That is, the outer cylinder portion 51 is formed with a hollow portion 511 that communicates from the first clamping portion 42 side to the opposite side along the axial direction of the shaft portion 41. The outer cylinder portion 51 of this embodiment is cylindrical.

[0030] The inner core portion 52 is a rod-shaped portion (a so-called mandrel) inserted into the outer cylinder portion 51. Specifically, the inner core portion 52 is inserted into the hollow portion 511 in the outer cylinder portion 51. The length of the inner core portion 52 along the axial direction is longer than the length of the outer cylinder portion 51 along the axial direction.

[0031] A head 521 is provided at one end in the axial direction of the inner core 52. The head 521 is located on the side of the outer tube 51 opposite the first clamping portion 42 when the inner core 52 is inserted into the outer tube 51. The head 521 is formed to a size sufficient to cover the opening of the hollow portion 511 in the outer tube 51 on the side opposite the first clamping portion 42, as viewed along the axial direction of the inner core 52. Furthermore, the outer shape of the head 521 is encompassed by the outer shape of the outer tube 51, as viewed along the axial direction of the inner core 52.

[0032] In this embodiment, the cross section perpendicular to the axial direction of inner core portion 52 is circular. The diameter of inner core portion 52 is generally constant except for head portion 521. However, a constricted portion 522, which is a portion with a smaller diameter than other adjacent portions, is formed in the middle portion of inner core portion 52 in the axial direction.

[0033] As shown in FIG. 3A , in the insertion process, the first member 2A and the second member 2B are first overlapped so that the through holes 21a and 21b overlap to form the through hole 22. At this time, a spacer member 6 is disposed between the first member 2A and the second member 2B. The spacer member 6 prevents the first member 2A and the second member 2B from contacting each other. The thickness of the spacer member 6 is designed to correspond to the axial play P of the through hole 22 that will ultimately be provided in the fastener 4. Specifically, the thickness of the spacer member 6 is 0.3 mm or more, more preferably 0.5 mm or more. The thickness of the spacer member 6 is preferably 5 mm or less. The spacer member 6 is disposed in close contact with both the first member 2A and the second member 2B so as not to leave any gap between them. In this embodiment, two spacer members 6 are disposed, one on each side of the through hole 22.

[0034] 3B, the fixing part 5 is inserted into the through hole 22 from the first member 2A side. At this time, the fixing part 5 is oriented so that the head 521 side faces the insertion direction, i.e., the head 521 is oriented so that it first passes through the through hole 22. The fixing part 5 is inserted into the through hole 22 up to a position where the first clamping part 42 abuts against the first member 2A. With the first clamping part 42 abutting against the first member 2A, the head 521 side of the fixing part 5 passes through the through hole 22 and is positioned outside the second member 2B.

[0035] [2-2. Crimping process] The crimping step shown in FIGS. 4A to 4C is a step of forming the second clamping portion 43 by plastically deforming the shaft portion 41 of the fixing part 5 inserted into the through-hole 22.

[0036] In the crimping process, as shown in FIGS. 4A and 4B , first, in the fixed component 5 inserted into the through-hole 22, the first clamping portion 42 of the outer tubular portion 51 is pressed against the first member 2A by a tool (not shown), and the inner core portion 52 is pulled from the outside of the first member 2A. As a result, the head 521 of the inner core portion 52 presses the shaft portion 41 of the outer tubular portion 51, causing the shaft portion 41 to plastically deform, and a second clamping portion 43 is formed on the side of the shaft portion 41 opposite the first clamping portion 42 side. Because the shaft portion 41 is pressed against the second member 2B and crimped, the second clamping portion 43 is formed in close contact with the second member 2B. As a result, the first clamping portion 42 and the second clamping portion 43 clamp the first member 2A and the second member 2B, which are arranged with the spacer member 6 sandwiched therebetween.

[0037] Then, as shown in FIG. 4C , inner core portion 52 of fixing component 5 is further pulled from the outside of first member 2A, causing inner core portion 52 to break at constricted portion 522. That is, fixing device 4 is formed from fixing component 5. As a result, fixing device 4 is positioned so as to sandwich first member 2A and second member 2B, which are sandwiched between spacer member 6, without leaving any gap between them.

[0038] [2-3. Removal process] The removing step shown in FIGS. 5A to 5C is a step of removing the spacer member 6 from between the first member 2A and the second member 2B that are clamped by the first clamping section 42 and the second clamping section 43.

[0039] In the removal process, first, as shown in FIGS. 5A and 5B , the spacer member 6 is removed from between the first member 2A and the second member 2B, which are clamped by the first clamping unit 42 and the second clamping unit 43. Because the spacer member 6 is clamped and pressed between the first member 2A and the second member 2B, a certain amount of pulling force is required to pull the spacer member 6 out from between the first member 2A and the second member 2B. For this reason, a pulling mechanism such as a hydraulic cylinder is used to pull the spacer member 6 out from between the first member 2A and the second member 2B. By pulling the spacer member 6 out from between the first member 2A and the second member 2B, a gap Q is provided between the first member 2A and the second member 2B.

[0040] Next, as shown in Fig. 5C, one of the first member 2A and the second member 2B is moved toward the other so that the first member 2A and the second member 2B come into contact with each other. Fig. 5C shows an example in which the second member 2B is moved toward the first member 2A. As a result, a gap Q is provided between the second clamping portion 43 of the fixing device 4 and the second member 2B.

[0041] In this way, the fastener 4 is provided so as to penetrate the overlapping first member 2A and second member 2B, sandwiching the first member 2A and second member 2B with play P in the axial direction of the through-hole 22. That is, a joined body 1 having a first joint portion 3A formed therein is obtained.

[0042] [3. Effect] Next, the behavior when an external force that displaces the overlapping position of the first member 2A and the second member 2B is applied to the joined body 1 will be described with reference to Figures 6A to 7B. Note that Figures 6A to 7B are schematic cross-sectional views of the joined body 1, but hatching has been omitted to facilitate understanding.

[0043] 6A and 7A, when an external force such as that described above is applied to the joined body 1, at the first joint 3A and the second joint 3B, positions on the shaft 41 of the fastener 4 that are offset from each other in the axial direction are pressed from opposite sides by the first member 2A and the second member 2B. As a result, at the second joint 3B, as shown in FIG. 6A, the load from the first member 2A and the second member 2B acts in a direction perpendicular to the axial direction of the shaft 41 of the fastener 4. For this reason, if the load acting on the shaft 41 becomes large, it is conceivable that the fastener 4 will be sheared, as shown in FIG. 6B.

[0044] To make such damage to the fastener 4 less likely to occur, the fastener 4 constituting the first joint portion 3A of the joined body 1 of this embodiment is intentionally provided with play P in the axial direction of the through hole 22. By providing play P in the axial direction of the through hole 22, the fastener 4 tilts within the through hole 22 as shown in FIG. 7B when pressed by the first member 2A and the second member 2B as described above. This causes the axial direction of the shank 41 to be inclined relative to the pressing direction, so that the load applied to the shank 41 by the first member 2A and the second member 2B is distributed into a component perpendicular to the axial direction of the shank 41 and a component parallel to the axial direction of the shank 41. In other words, providing play P in the axial direction of the through hole 22 makes the fastener 4 less likely to be sheared. Therefore, the shear strength of the joined body 1 as a whole is improved compared to a configuration in which the fastener 4 does not have play in the axial direction of the through hole 22.

[0045] [4. Effects] According to the embodiment described above in detail, the following effects can be obtained. (4a) The joint 1 uses a fixing device 4 in which an axial portion 41 is inserted into the through hole 22 and the first clamping portion 42 and the second clamping portion 43 are arranged to clamp the first member 2A and the second member 2B with play P in the axial direction of the through hole 22.

[0046] With this configuration, when an external force is applied to the joined body 1 such that the overlapping position of the first member 2A and the second member 2B is displaced, the fastener 4, which has play P in the axial direction of the through-hole 22, tilts within the through-hole 22, reducing the load acting perpendicular to the axial direction of the shaft 41 of the fastener 4. In other words, the fastener 4 is less likely to shear. Therefore, the shear strength of the joined body 1 as a whole can be improved.

[0047] (4b) In this embodiment, the fastener 4 is a rivet. A rivet is a member that realizes a fixed joint between the first member 2A and the second member 2B by undergoing plastic deformation, and therefore may have lower resistance to external forces than a member that realizes a fixed joint between the first member 2A and the second member 2B without undergoing plastic deformation. Even in such cases, by providing the rivet serving as the fastener 4 with play P in the axial direction of the through hole 22, it is possible to achieve the shear strength required of the joined body 1.

[0048] (4c) In this embodiment, it is assumed that a general-purpose rivet is used as the fastener 4. Even when a general-purpose fastener 4 is used, the shear strength of the joined body 1 can be improved by providing the fastener 4 with play P in the axial direction of the through-hole 22. In other words, the shear strength of the joined body 1 can be improved without using a dedicated rivet.

[0049] (4d) In this embodiment, the first member 2A and the second member 2B are made of high-tensile steel. As described above, in the fixed joining of high-tensile steel, the fastener 4 is sometimes used as an alternative to welding due to concerns about weld cracking. Fixed joining using the fastener 4 may have lower shear strength than welding. However, by providing the fastener 4 with play P in the axial direction of the through hole 22, it is possible to achieve the shear strength required for the joined body 1.

[0050] (4e) The fastener 4 constituting the first joint 3A has play P in the axial direction of the through-hole 22. For this reason, if the first member 2A and the second member 2B were fixed and joined only by the first joint 3A, the first member 2A and the second member 2B would not be in complete contact with each other, and there is a possibility that a relative displacement would occur between them.

[0051] However, the joined body 1 is provided with a plurality of joints including the first joint 3A. With this configuration, the first member 2A and the second member 2B are fixedly joined by a plurality of joints, which at least makes it possible to suppress relative rotation of the first member 2A with respect to the second member 2B.

[0052] (4f) In particular, in this embodiment, the second joint portion 3B is included in the multiple joints in the joined body 1. The fastener 4 constituting the second joint portion 3B has no play in the axial direction of the through-hole 22.

[0053] With this configuration, the first member 2A and the second member 2B are sandwiched between the fixing device 4 at the second joint 3B, which makes it possible to suppress relative displacement of the first member 2A with respect to the second member 2B in the overlapping direction of the first member 2A and the second member 2B. Specifically, it becomes easier to maintain a state in which the first member 2A and the second member 2B are in close contact with each other and do not move.

[0054] (4g) In the manufacturing method of the joined body 1, when forming the first joining portion 3A, the second clamping portion 43 is formed at a position such that a gap Q is provided between at least one of the following: between the first member 2A and the first clamping portion 42; between the first member 2A and the second member 2B; and between the second member 2B and the second clamping portion 43.

[0055] With this configuration, the fastener 4 constituting the first joint portion 3A can be given play P in the axial direction of the through-hole 22. Therefore, the shear strength of the joined body 1 can be improved.

[0056] (4h) In the manufacturing method of the bonded body 1, when forming the first bonding portion 3A, the second sandwiching portion 43 is formed in a state in which the spacer member 6 is disposed between the first member 2A and the second member 2B. Then, the spacer member 6 is removed after the second sandwiching portion 43 is formed.

[0057] With this configuration, by crimping the shaft portion 41 of the fixing part 5 as usual with the spacer member 6 in place and then removing the spacer member 6, the second clamping portion 43 can be formed at a position that provides the gap Q described in (4g) above. Furthermore, the size of the gap Q can be adjusted by changing the thickness of the spacer member 6. Therefore, a desired amount of play P in the axial direction of the through-hole 22 can be provided in the fixing device 4 that constitutes the first joint portion 3A by a relatively simple method.

[0058] (4i) In the manufacturing method of the joined body 1, as described in (4h) above, when forming the first joint portion 3A, a spacer member 6 is disposed between the first member 2A and the second member 2B. At this time, by disposing the spacer member 6 in a position close to the through hole 22, when the shaft portion 41 of the fixing part 5 is crimped to form the second clamping portion 43, it is possible to prevent the second member 2B from being pressed by the second clamping portion 43 and bending toward the first member 2A. Therefore, it is possible to easily provide the fixing device 4 with a desired amount of play P in the axial direction of the through hole 22.

[0059] 5. Other Embodiments Although the embodiments of the present disclosure have been described above, it goes without saying that the present disclosure is not limited to the above-described embodiments and can take on various forms.

[0060] (5a) In the manufacturing method of the joined body 1 of the above embodiment, the spacer member 6 is disposed between the first member 2A and the second member 2B in the insertion step. However, the position where the spacer member 6 is disposed in the insertion step does not necessarily have to be between the first member 2A and the second member 2B. For example, the spacer member 6 may be disposed between the first member 2A and the first clamping portion 42 of the fixing part 5. More specifically, the spacer member 6 may be disposed in close contact with both the first member 2A and the first clamping portion 42 of the fixing part 5 so that there is no gap between them. Furthermore, for example, the spacer member 6 may be disposed in close contact with the second member 2B on the opposite side of the first clamping portion 42 of the fixing part 5 with respect to the first member 2A and the second member 2B.

[0061] Even when the spacer member 6 is provided in such a position, as in the above embodiment, in the subsequent crimping process, the shaft portion 41 of the fixing part 5 is crimped while the first clamping portion 42 of the fixing part 5 is pressed against the member adjacent to the through hole 22 in the axial direction (specifically, the first member 2A or the spacer member 6), and then the spacer member 6 is removed, thereby giving the fixing device 4 play P in the axial direction of the through hole 22.

[0062] Furthermore, for example, the spacer member 6 may be arranged at two or more positions among between the first member 2A and the second member 2B, between the first member 2A and the first clamping portion 42 of the fixing part 5, and on the opposite side of the first clamping portion 42 of the fixing part 5 and the first member 2A and the second member 2B.

[0063] (5b) In the manufacturing method of the joined body 1 of the above embodiment, in the insertion step, the spacer member 6 is placed, and then the fixing part 5 is inserted into the through hole 22. However, the order of these operations is not particularly limited, and for example, the spacer member 6 may be placed after the fixing part 5 is inserted into the through hole 22.

[0064] (5c) In the above embodiment, the spacer member 6 is a member of a constant thickness, but the shape of the spacer member is not particularly limited. For example, as shown in FIG. 8, the spacer member 6A may have a shape in which the thickness gradually decreases (i.e., a tapered shape). In this case, in the insertion step of the method for manufacturing the joined body 1, for example, by arranging the spacer member 6A with the thinner side facing the through-hole 22, the spacer member 6A can be easily pulled out after the second clamping portion 43 is formed in the crimping step.

[0065] (5d) In the manufacturing process of the joined body 1 of the above embodiment, a spacer member 6 is used to provide play P in the fastener 4, but a spacer member is not necessarily used. For example, as shown in FIG. 9 , in the crimping process, an abutting member 7 may be abutted against the surface of the first member 2A facing the first clamping portion 42 to restrict movement of the first member 2A toward the first clamping portion 42, and the first clamping portion 42 may be held at a position where a gap Q is provided between the first member 2A and the first clamping portion 42 by a holding member (not shown). In this state, the inner core portion 52 of the fixing part 5 is pulled from the first member 2A side to form the second clamping portion 43. Thereafter, by further pulling and breaking the inner core portion 52 in the same manner as in the above embodiment, play P can be provided in the fastener 4 in the axial direction of the through hole 22.

[0066] (5e) In the manufacturing method of the bonded body 1 of the above embodiment, in the removal step, after the spacer member 6 is removed, one of the first member 2A and the second member 2B is moved toward the other so that the first member 2A and the second member 2B come into contact with each other. However, the operation of bringing the first member 2A and the second member 2B into contact with each other does not necessarily have to be performed.

[0067] (5f) In the above embodiment, the fastener 4 is a rivet. However, the fastener is not limited to a member that realizes a fixed connection between the first member 2A and the second member 2B with plastic deformation, such as a rivet. The fastener may be a member that realizes a fixed connection between the first member 2A and the second member 2B without plastic deformation, such as a grommet or a combination of a bolt and a nut.

[0068] (5g) In the above embodiment, the fasteners 4 are used for both the first joint 3A and the second joint 3B in the joined body 1. However, the multiple joints provided in the joined body are not limited to joints using the fasteners 4. For example, the joints may be formed in the joined body by welding such as spot welding. Therefore, the multiple joints provided in the joined body may include, for example, joints in which the fasteners 4 are arranged with play P in the axial direction of the through-hole 22, and joints formed by welding.

[0069] (5h) The joined body 1 in the above embodiment is a structure in which two members, a first member 2A and a second member 2B, are fixedly joined. However, the joined body may be a structure in which three or more members are fixedly joined. That is, the fastener 4 may penetrate three or more overlapping members and be arranged with play P in the axial direction of the through-hole formed in the three or more members.

[0070] (5i) In the above embodiment, the first member 2A and the second member 2B are made of high-tensile steel. Furthermore, in the above embodiment, the tensile strength of the first member 2A and the second member 2B is exemplified as 430 MPa or more. However, the material and tensile strength of each of the members to be fixedly joined are not particularly limited. For example, the material of each of the members to be fixedly joined may be steel, iron, aluminum, resin, etc. Furthermore, the material and tensile strength of the multiple members to be fixedly joined may be the same or different from each other.

[0071] (5j) The material and tensile strength of the fastener are not particularly limited. Furthermore, the tensile strength of the fastener does not necessarily have to be lower than the tensile strength of each of the components to be fixed and joined, as in the above embodiment.

[0072] (5k) The function of one component in the above embodiments may be distributed among multiple components, or the functions of multiple components may be integrated into one component. Also, part of the configuration of the above embodiments may be omitted. Furthermore, at least part of the configuration of the above embodiments may be added to or substituted for the configuration of another of the above embodiments.

[0073] [Technical idea disclosed in this specification] [Item 1] A joined body in which a plurality of members are fixedly joined, the plurality of members each having a through hole formed therein and communicating with each other when the members are stacked together; a fixture including a shaft portion that can be inserted into the through-hole, and a first clamping portion and a second clamping portion that are provided on both sides of the shaft portion in the axial direction and that clamp the plurality of members; Equipped with The fixing device is a joined body, wherein the shaft portion is inserted into the through hole, and the first clamping portion and the second clamping portion are arranged to clamp the multiple components with play in the axial direction of the through hole.

[0074] [Item 2] The conjugate according to item 1, The joining body, wherein the fastener is a rivet.

[0075] [Item 3] The conjugate according to item 1 or 2, A bonded structure, wherein at least one of the plurality of members has a tensile strength of 780 MPa or more.

[0076] [Item 4] The conjugate according to any one of items 1 to 3, The plurality of members are fixedly joined by a plurality of joints, A joint body, wherein the fastener having the play is used in at least one of the plurality of joints.

[0077] [Item 5] A method for producing the bonded body according to any one of items 1 to 4, comprising the steps of: inserting the shaft portion of a fixing component having the shaft portion and the first clamping portion into the through-holes of the plurality of overlapping members; forming the second clamping portion on the shaft portion of the fixed component inserted into the through hole on a side opposite to the first clamping portion side that clamps the plurality of members; Equipped with A method for manufacturing a bonded body, wherein the second clamping portion is formed at a position where a gap is provided between at least one of the plurality of members, between the plurality of members and the first clamping portion, and between the plurality of members and the second clamping portion.

[0078] [Item 6] Item 5. A method for producing a bonded body according to item 5, the second clamping section is formed in a state in which a spacer member is disposed between the plurality of members, between the plurality of members and the first clamping section, and on at least one of the opposite sides of the first clamping section and the plurality of members, The method for manufacturing a bonded body, wherein the spacer member is removed after the second clamping portion is formed.

[0079] [Item 7] A method for producing the bonded body according to item 5 or 6, The method for manufacturing a joined body, wherein the second clamping portion is formed by plastic deformation of the shaft portion of the fixed component. [Explanation of symbols]

[0080] 1...joint body, 2A...first member, 2B...second member, 22...through hole, 3A...first joint portion, 3B...second joint portion, 4...fixing device, 41...shaft portion, 42...first clamping portion, 43...second clamping portion, 5...fixing part, 6...spacer member, P...play, Q...spacing.

Claims

1. A method for manufacturing a joined body in which a plurality of members are fixedly joined, comprising: inserting a shaft portion of a fixing component having a shaft portion and a first clamping portion provided on one side of the shaft portion in an axial direction into the communicating through-holes of the plurality of overlapping members; forming a second clamping portion for clamping the plurality of members together with the first clamping portion on the side opposite to the first clamping portion side that clamps the plurality of members in the shaft portion of the fixing component inserted into the through hole; Equipped with A method for manufacturing a joined body, wherein the second clamping portion is formed with a spacer member placed between the plurality of members, between the plurality of members and the first clamping portion, and on at least one of the opposite sides of the first clamping portion and the plurality of members, and then the spacer member is removed, thereby forming the second clamping portion at a position where a gap is provided between the plurality of members, between the plurality of members and the first clamping portion, and between the plurality of members and the second clamping portion.

2. A method for manufacturing a joint in which a plurality of members are fixedly joined by a plurality of joints including a first joint and a second joint, comprising: The first bonding portion is formed by: inserting a shaft portion of a fixing component having a shaft portion and a first clamping portion provided on one side of the shaft portion in an axial direction into the communicating through-holes of the plurality of overlapping members; forming a second clamping portion for clamping the plurality of members together with the first clamping portion on the side opposite to the first clamping portion side that clamps the plurality of members in the shaft portion of the fixing component inserted into the through hole; Equipped with A method for manufacturing a joined body, wherein the second clamping portion is formed with a spacer member placed between the plurality of members, between the plurality of members and the first clamping portion, and on at least one of the opposite sides of the first clamping portion and the plurality of members, and then the spacer member is removed, thereby forming the second clamping portion at a position where a gap is provided between the plurality of members, between the plurality of members and the first clamping portion, and between the plurality of members and the second clamping portion.

3. A method for producing the bonded body according to claim 1 or 2, comprising: The method for manufacturing a joined body, wherein the second clamping portion is formed by plastic deformation of the shaft portion of the fixed component.

4. A method for producing the bonded body according to claim 1 or 2, comprising: The method for manufacturing a joined body, wherein the fixing part is a rivet.

5. A method for producing the bonded body according to claim 1 or 2, comprising: At least one of the plurality of members has a tensile strength of 780 MPa or more.

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