Joining structure between members

Abstract

To provide a joint structure between members in which a desired vibration damping effect or the like can be expected even if a distance between the members changes before curing of a sealer material.SOLUTION: There is provided a joint structure between members in which a sealer material 5 is interposed between a first member 2a and a second member 3a. A wall portion 41 that at least partially surrounds the sealer material 5 is formed on a surface of at least one of the first member 2a and the second member 3a, which faces the other member.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a joining structure between members, and is applied, for example, to a case where a sealing material is interposed between an inner member and an outer member in a vehicle body to join both members while providing a vibration damping function.

Background Art

[0002] In vehicle body manufacturing, a technique of interposing a sealing material between a lean hose and an outer panel is described in, for example, Patent Document 1. The sealing material is a rubber-like joining material, and in addition to preventing contact between the lean hose and the outer panel, it has a role of suppressing vibration of the members joined by the sealing material. This type of sealing material is widely used not only for joining between a lean hose and an outer panel but also for joining panels in a state where they are overlapped in the thickness direction.

[0003] Conventionally, the joining of the lean hose a and the outer panel b through the sealing material c is performed as shown in FIG. 6(a) by providing a convex seating surface d on the lean hose a, applying the liquid sealing material c to this seating surface d, placing the outer panel b thereon, and after undergoing predetermined processes such as welding and hemming, curing the sealing material c in the baking process during painting.

[0004] By the way, the sealing material c before curing is affected by vibrations during conveyance of the vehicle body and surface fluctuations between the lean hose and the outer panel that occur during welding and hemming (fluctuations in which the surface distance decreases as shown in FIG. 6(b) and then increases as shown in FIG. 6(c)), is crushed, and after a part of it protrudes from the seating surface d, it receives a stretching force in a direction intersecting the seating surface d. Once a part of the sealing material c has protruded from the seating surface d, it does not return to its original state even when the surface distance increases, and as shown in FIG. 6(c), the amount intervening between the seating surface d and the outer panel b decreases, and the above-described contact prevention and vibration damping effects expected of the cured sealing material c are not sufficiently exhibited.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

[0006] The present invention was conceived under the circumstances described above, and its objective is to provide a joint structure between members that can be expected to achieve the desired vibration damping effect even if the distance between members changes before the sealant hardens. [Means for solving the problem]

[0007] To solve the above problems, the present invention employs the following technical means.

[0008] In other words, the joint structure between members provided by the present invention is a joint structure between members in which a sealant is interposed between a first member and a second member, characterized in that a wall portion is formed on the surface of at least one of the first member and the second member facing the other member, at least partially surrounding the sealant. [Effects of the Invention]

[0009] According to the joint structure between members of the present invention, even if the inter-face distance between the first member and the second member changes before the sealant hardens, the wall portion minimizes the overflow of the sealant to the periphery, and allows an appropriate amount of sealant to remain in the area surrounded by the wall portion.

[0010] As a result, even if the distance between the first and second members changes before the sealant hardens, the sealant can still achieve the expected effects, such as preventing mutual contact between the first and second members and providing vibration damping.

[0011] Other features and advantages of the present invention will become more apparent from the detailed description below with reference to the drawings. [Brief explanation of the drawing]

[0012] [Figure 1] This is a cross-sectional view showing an embodiment of the present invention. [Figure 2] Figure 1 is a plan view of the leanhose in the configuration shown. [Figure 3] This is a plan view of a modified example of the Reinforce. [Figure 4] This is a cross-sectional view illustrating the function. [Figure 5] This is a cross-sectional view showing another embodiment of the present invention. [Figure 6] This is a cross-sectional view illustrating the prior art. [Modes for carrying out the invention]

[0013] Preferred embodiments of the present invention will be described in detail below with reference to the drawings.

[0014] Figure 1 shows an example in which the present invention is applied as a joining structure A1 between the reinforcement 2 and the outer panel 3 in the vehicle body 1. The reinforcement 2 corresponds to the first member 2a of the present invention, and the outer panel 3 corresponds to the second member 3a of the present invention.

[0015] The reinforcement 2 is a sheet metal member, and as is clearly shown in Figure 1, an embossed protrusion 4 that bulges out toward the outer plate 3 is provided, thereby creating a wall portion 41 that surrounds the sealant material 5. The protrusion 4 may be formed in an annular shape, as shown in Figure 2, or multiple protrusions may be provided spaced apart in a position surrounding the sealant material 5, as shown in Figure 3.

[0016] The joining of the reinforcement 2 and the outer panel 3 via the sealant 5 is carried out as follows.

[0017] A liquid sealant 5 is applied to the area surrounded by the convex portion 4 of the lean hose 2 (Fig. 4(a)), and the outer plate 3 is overlaid so that its lower surface contacts the sealant 5 (Fig. 4(b)). In this state, the vehicle body 1 is conveyed between processes, and welding, hemming, and other processes are performed. During this time, the surface-to-surface distance between the lean hose 2 and the outer plate 3 may vary due to external forces generated during the processes (Figs. 4(c) and (d)). That is, it may exhibit a behavior of returning after going through a variation of first shrinking (Fig. 4(c)) and then expanding (Fig. 4(d)) in the surface-to-surface distance. Finally, by baking treatment in the painting process, the liquid sealant 5 is cured to have rubber properties (Fig. 4(e)).<> <>

[0018] <> As can be seen from Figs. 4(c) and (d), even if the surface-to-surface distance between the lean hose 2 and the outer plate 3 varies before the sealant 5 is cured, the wall portion 41 formed by the convex portion 4 minimizes the protrusion of the sealant 5 to the peripheral portion, retains an appropriate amount of the sealant 5 in the area surrounded by the wall portion 41, and can finally cure it. Therefore, the joining structure of the lean hose 2 and the outer plate 3 with the above configuration can achieve the intended effects expected of the sealant 5, such as preventing mutual contact between the lean hose 2 and the outer plate 3 and vibration damping, even if the distance between the lean hose 2 and the outer plate 3 varies before the sealant 5 is cured.<> <>

[0019] <> Of course, the present invention is not limited to the above-described embodiments, and any modification within the scope of the matters described in the claims is included in the scope of the present invention.<> <>

[0020] <> In the embodiment, the present invention is applied as the joining structure A1 between the lean hose 2 and the outer plate 3 in the vehicle body 1. However, the present invention can be applied to any joining between members that is performed by interposing a liquid sealant between two members and then curing this sealant.<> <>

[0021] <> In the embodiment, a wall portion 41 surrounding the sealant 5 is formed by providing a convex portion 4 on the first member 2a (lean hose 2). However, as shown in Fig. 5, a wall portion 41 may be formed by providing a concave portion 6 that bulges on the side of the first member 2a (lean hose 2) opposite to the second member 3a (outer plate 3).<> [Explanation of Symbols]

[0022] A1 Joint structure 1. Vehicle body 2 Reinforce 2a First member 3. Exterior panels 3a Second member 4. Convex part 41 Wall 5. Sealing agent 6 recesses

Claims

[Claim 1] A joint structure between members, wherein a sealant is interposed between a first member and a second member located above the first member, A wall portion is formed on the surface of the first member facing the second member, which at least partially surrounds the sealant material. The above wall portion is formed by a convex portion of a predetermined width in the radial direction of the sealant material, which bulges out in an embossed manner toward the second member side. The above-mentioned protrusions are provided surrounding the sealant material in a continuous annular shape, or in multiple separate portions, characterized in that this is a joint structure between members.

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