JP2021126931A - Vehicular body structure for vehicle and vehicular body manufacturing method - Google Patents

Abstract

To suppress a suspending of a vibration damping member, and to accomplish an excellent vibration damping effect.SOLUTION: A vehicular body structure 1A for a vehicle includes: a first vehicular body member 2 that includes a vertical wall portion 21 which has a first joining surface 2A; a second vehicular body member 3 that has a second joining surface 3A facing the first joining surface 2A; a damping bond material 4 that is present between both the joining surfaces 2A and 3A so as to bond the first joining surface 2A and the second joining surface 3A to each other; and a seat member 6 placed in the damping bond material 4 so as to maintain the shape of the damping bond material 4. The seat member 6 includes: a first opposing surface 61 that faces the first joining surface 2A through an inner side portion 41 of the damping bond material 4; and a second opposing surface 62 that faces the second joining surface 3A through an outer side portion 42 of the damping bond material 4.SELECTED DRAWING: Figure 3

Description

The present invention relates to a vehicle body structure and a vehicle body manufacturing method for joining a vehicle body member with a vibration damping member interposed therebetween.

The body of a vehicle such as an automobile includes a portion formed by joining a plurality of body members. For example, a side sill or roof rail having a closed cross-section structure is formed by joining a pair of vehicle body members forming a closed cross section and a knot member (reinforcing member) for reinforcing the closed cross section. Further, a technique is known in which a vibration damping member for damping vibration is interposed in the joint portion. Generally, a thermosetting damping adhesive is used as the vibration damping member. The closed cross-section structure is manufactured by applying the damping adhesive to the joined portion, joining the vehicle body members to each other, and then thermosetting the damping adhesive.

The damping adhesive has fluidity before curing. Therefore, when the joint portion becomes a vertical wall in the completed state of the vehicle body, the drooping of the damping adhesive becomes a problem. Patent Document 1 discloses a technique of providing an uneven shape such as a bead portion on a joint surface of a vehicle body member to be joined via a vibration damping member. By locking the damping adhesive having fluidity due to the uneven shape, the damping adhesive is prevented from dripping.

JP-A-2019-55669

However, in the vehicle body structure of Patent Document 1, the rigidity of the vehicle body member changes due to the formation of the bead portion. Generally, the bead portion improves the rigidity of the vehicle body member. In this case, the strain energy sharing ratio of the damping adhesive interposed between the vehicle body members may decrease, and the vibration damping effect may be reduced.

An object of the present invention is to provide a vehicle body structure and a vehicle body manufacturing method capable of suppressing the drooping of a vibration damping member and exerting an excellent vibration damping effect.

The vehicle body structure of the vehicle according to one aspect of the present invention includes a first vehicle body member having a vertical wall portion having a first joint surface and a second vehicle body member having a second joint surface facing the first joint surface. , The vibration damping member interposed between the two joint surfaces and the vibration damping member are arranged inside the vibration damping member to maintain the shape of the vibration damping member so as to bond the first joint surface and the second joint surface. The sheet member includes a first facing surface that faces the first joint surface with a part of the vibration damping member, and another of the second joint surface and the vibration damping member. It is characterized in that it includes a second facing surface that faces through a part thereof.

According to this vehicle body structure, since the seat member is arranged inside the vibration damping member, even if the vibration damping member is arranged on the vertical wall portion, the vibration damping member does not hang down due to the shape-retaining action of the seat member. , Its shape is maintained. Further, a part of the vibration damping member is interposed between the first and second facing surfaces of the sheet member and the first and second joint surfaces. That is, the seat member does not exist at the interface between the first and second joint surfaces and the vibration damping member. Therefore, the arrangement of the sheet members does not significantly affect the strain accumulation action on the vibration damping member due to the relative displacement between the first joint surface and the second joint surface, and reduces the vibration damping effect. There is no such thing. Therefore, it is possible to provide a vehicle body structure capable of suppressing the drooping of the vibration damping member and exerting an excellent vibration damping effect.

In the vehicle body structure of the vehicle, the vibration damping member is a member having fluidity before the hardening treatment, and the first facing surface and the second facing surface of the seat member are hanging of the vibration damping member. It is desirable to have a surface structure that generates a frictional force against the flow.

According to this vehicle body structure, even when a vibration damping member is applied to the vertical wall portion in a state of having fluidity, the vibration due to gravity due to the frictional force generated by the first and second facing surfaces of the seat member. It is possible to prevent the damping member from sagging.

In the vehicle body structure of the vehicle, the surface structures of the first facing surface and the second facing surface can be a surface structure having irregularities on the surface or a surface structure having pores.

According to these vehicle body structures, the first and second facing surfaces vibrate due to the locking effect of the vibration damping member due to the shape of the unevenness or the locking effect due to the entry of the vibration damping member into the pores. It comes to exert a frictional force against the damping member. Therefore, it is possible to prevent the vibration damping member from hanging down.

In the vehicle body structure of the vehicle, the seat member can be a seat member made of a non-woven fabric sheet.

Generally, the non-woven fabric sheet has a rough surface and is lightweight and flexible. Therefore, a frictional force can be exerted on the vibration damping member, the mass is not increased so much, and the rigidity of the vibration damping member is not changed. Therefore, it is possible to provide a vehicle body structure capable of preventing the vibration damping member from hanging down and exhibiting a target vibration damping effect.

In the vehicle body structure of the vehicle, it is desirable that the first vehicle body member is a member forming a closed cross section, and the second vehicle body member is a reinforcing member arranged in the closed cross section.

According to this vehicle body structure, the joints of the first and second vehicle body members are arranged in a closed cross section in which the operator cannot easily see and repair the drooping deformation of the vibration damping member. become. In such an arrangement, the vibration damping performance of the vehicle body and the manufacturing efficiency of the vehicle body can be further improved by surely preventing the vibration damping member from hanging down.

The vehicle body manufacturing method according to another aspect of the present invention is the method for manufacturing the vehicle body structure, wherein the first joint surface of the first vehicle body member or the second joint surface of the second vehicle body member. A first coating step of applying a part of the vibration damping member to any of the above, and a pasting step of pasting the first facing surface of the sheet member on the part of the applied vibration damping member. And the second coating step of coating the other part of the vibration damping member on the second facing surface of the sheet member, and either the second joint surface or the first joint surface is described. It is characterized by comprising a bonding step of bonding on the other part of the applied vibration damping member.

According to this vehicle body manufacturing method, a laminated structure composed of a first vehicle body member, a second vehicle body member, a vibration damping member, and a seat member can be manufactured in a form in which these constituent members are sequentially laminated. Therefore, the laminated structure can be easily manufactured in the normal manufacturing process of the vehicle body.

The vehicle body manufacturing method according to still another aspect of the present invention is the above-mentioned method for manufacturing the vehicle body structure, which includes a step of preparing a vibration damping member having fluidity before the curing treatment, and the seat member. Is immersed in the fluid vibration damping member, a part of the vibration damping member is adhered on the first facing surface, and another part of the vibration damping member is placed on the second facing surface. The bonding step of adhering and the laminate obtained in the bonding step are sandwiched between the first joint surface of the first vehicle body member and the second joint surface of the second vehicle body member, and the first joint is performed. It is characterized by comprising a bonding step of bonding the surface and the second joint surface.

According to this vehicle body manufacturing method, the vibration damping member is attached to the first and second facing surfaces of the seat member at once by the bonding step, and the vehicle body is manufactured by performing the bonding step on the obtained laminated body. Will be done. That is, it is possible to manufacture a laminated structure composed of a first vehicle body member, a second vehicle body member, a vibration damping member, and a seat member in a small number of steps.

According to the present invention, it is possible to provide a vehicle body structure and a vehicle body manufacturing method capable of suppressing the drooping of the vibration damping member and exerting an excellent vibration damping effect.

FIG. 1 is a schematic side view of a vehicle body to which the present invention is applied. FIG. 2 is a schematic bottom view of a vehicle body to which the present invention is applied. FIG. 3A is a cross-sectional view showing an example of a closed cross-sectional structure, and FIG. 3B is a cross-sectional view taken along the line IIIB-IIIB of FIG. 3A. FIG. 4 is an enlarged view of a main part of FIG. 3 (B). 5 (A) and 5 (B) are side views with an enlarged cross-sectional view showing a specific example of the shape-retaining sheet member. FIG. 6 is a process chart showing the procedure of the vehicle body manufacturing method according to the manufacturing method Example 1. 7 (A) to 7 (D) are schematic views for explaining each step of the manufacturing method Example 1. FIG. 8 is a process chart showing the procedure of the vehicle body manufacturing method according to the manufacturing method Example 2. 9 (A) to 9 (D) are schematic views for explaining each step of the manufacturing method Example 2. FIG. 10 is a cross-sectional view of a side sill having a closed cross section. FIG. 11 is a perspective view of the reinforcing member arranged in the closed cross section of the side sill. 12 (A) and 12 (B) are views showing a method of manufacturing a side sill. FIG. 13 is a cross-sectional view of a roof rail having a closed cross section. FIG. 14 is a side view of the roof gusset (reinforcing member) arranged in the closed cross section of the roof rail from the vehicle interior side. FIG. 15 is a perspective view of the roof gusset. 16 (A) to 16 (C) are side views for explaining a method of manufacturing a roof rail.

[Body structure]
Hereinafter, the vehicle body structure and the vehicle body manufacturing method of the vehicle according to the present invention will be described in detail with reference to the drawings. First, the overall body structure of the vehicle to which the present invention is applied will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic side view of the vehicle body 1 of the vehicle, and FIG. 2 is a bottom view thereof. The vehicle body 1 of the vehicle illustrated in FIGS. 1 and 2 is that of a hatchback type four-wheeled vehicle. The vehicle to which the present invention is applied is not limited to the examples here, and may be other types of four-wheeled vehicles, trucks, buses, various work vehicles, and the like.

The vehicle body 1 includes side frames 10 that form the left and right side surfaces of the vehicle. As shown in FIG. 1, the side frame 10 includes a roof rail 11, a front pillar 12, a center pillar 13, a rear pillar 14, and a side sill 15. The constituent members of the side frame 10 are composed of high-rigidity frame members having a closed cross section. The roof rail 11 extends in the upper part of the vehicle and the side sill 15 extends in the front-rear direction of the vehicle in the lower part of the vehicle. The roof rail 11 and the side sill 15 are arranged in pairs on the left and right sides of the vehicle. The roof rail 11 and the side sill 15 are vertically connected by a front pillar 12 on the front side, a rear pillar 14 on the rear side, and a center pillar 13 near the center in the front-rear direction.

As shown in FIG. 2, a tunnel rain 16 extends in the front-rear direction in the central region in the vehicle width direction between the pair of side sills 15. A plurality of cross members 17 are arranged so as to cross the tunnel rain 16. Both ends of these cross members 17 are connected to the left and right side sills 15, respectively. The cross member 17 is also made of a highly rigid frame member having a closed cross section. A flat floor panel 18 is arranged between the pair of side sills 15 and below the cross member 17. The floor panel 18, the side sill 15, the tunnel rain 16 and the cross member 17 are connected to each other to form a structure under the vehicle. A roof rain (not shown) is erected between the pair of roof rails 11.

[Car body structure with closed cross section]
Subsequently, an embodiment of the vehicle body structure according to the present invention will be described. FIG. 3A is a cross-sectional view (cross-sectional view along the front-rear direction of the vehicle) of the vehicle body structure 1A having the closed cross section C in the vehicle body 1. FIG. 3B is a cross-sectional view taken along the line IIIB-IIIB of FIG. 3A (cross-sectional view along the vehicle width direction), and FIG. 4 is an enlarged view of a main part of FIG. 3B. The vehicle body structure 1A includes a first vehicle body member 2, a second vehicle body member 3, a damping adhesive 4 (vibration damping member), a third vehicle body member 5, and a seat member 6. For example, the first vehicle body member 2 and the third vehicle body member 5 are vehicle body members forming a closed cross section C, and the second vehicle body member 3 is a rigid reinforcing body (reinforcing member) arranged in the closed cross section C. .. The vehicle body structure 1A illustrated here may be a simplified structure of the roof rail 11, front pillar 12, center pillar 13, rear pillar 14, side sill 15, and cross member 17 having the above-mentioned closed cross section. be.

The first vehicle body member 2 is a frame having a hat-shaped cross section that opens to the outside of the vehicle, and includes a vertical wall portion 21 extending in the vertical direction and a pair of upper and lower flange portions 22. The vertical wall portion 21 has a first joint surface 2A which is a joint surface with respect to the second vehicle body member 3 on the outer side surface of the vehicle. The pair of flange portions 22 are arranged on the upper end side and the lower end side of the first vehicle body member 2.

The second vehicle body member 3 includes a vertical wall portion 31 extending in the vertical direction, a pair of side plates 32 extending in the vehicle width direction, and a pair of flange portions 33. The vertical wall portion 31 has a second joint surface 3A which is a joint surface with respect to the first joint surface 2A on the inner side surface of the vehicle. The second joint surface 3A faces the first joint surface 2A at a predetermined interval (for example, about 5 mm to 25 mm). The pair of side plates 32 extend to the outside of the vehicle from the front and rear ends of the vertical wall portion 31. The flange portion 33 extends from the end portion of the side plate 32 on the outside of the vehicle.

The third vehicle body member 5 is a frame having a hat-shaped cross section that opens inside the vehicle, and includes a vertical wall portion 51 extending in the vertical direction and a pair of upper and lower flange portions 52. The third vehicle body member 5 is joined to the first vehicle body member 2 and the second vehicle body member 3 by spot welding. As shown in FIG. 3A, the spot joint SW is formed by directly superimposing the flange portion 33 of the second vehicle body member 3 on, for example, the vertical wall portion 51 of the third vehicle body member 5 and performing welding processing. It is formed. Further, as shown in FIG. 3B, the flange portion 52 of the third vehicle body member 5 is overlapped with the flange portion 22 of the first vehicle body member 2, and the spot joint portion SW is formed.

FIG. 3B shows an example in which the vertical wall portions 21, 31, and 51 extend in the vertical direction. In the present invention, the "vertical wall portion" is not necessarily limited to the wall portion extending in the vertical direction. For example, even a wall portion inclined by about 30 ° with respect to the vertical direction is in the category of the “vertical wall portion”. Further, even if the wall is inclined by about 45 ° with respect to the vertical direction, the wall portion where the damping adhesive 4 having the fluidity before curing is expected to hang down is in the category of the “vertical wall portion”. be.

The damping adhesive 4 is an adhesive interposed between the two joint surfaces 2A and 3A so as to bond the first joint surface 2A and the second joint surface 3A. The damping adhesive 4 is a material that has fluidity before the curing treatment and is cured by a treatment such as heating or light irradiation, and is not particularly limited as long as it is a member having adhesiveness and a predetermined viscoelasticity. For example, a viscoelastic member made of a silicone-based material or an acrylic-based material can be used. The physical properties of the damping adhesive 4 after curing are such that the storage elastic modulus is in the range of 200 MPa to 3000 MPa and the loss coefficient is 0. Under the conditions that the temperature is 20 ° C. and the frequency of the exciting force is 200 Hz. Those having two or more characteristics are preferable. Such a damping adhesive 4 absorbs vibration energy as strain energy, converts it into thermal energy and dissipates it, thereby damping the vibration.

The sheet member 6 is a member arranged inside the damping adhesive 4 for shape retention of the damping adhesive 4 arranged between the pair of vertical wall portions 21 and 31. In the present embodiment, the seat member 6 arranged so as to extend linearly in the vertical direction at the center of the damping adhesive 4 in the thickness direction (vehicle width direction) is illustrated. In the front-rear direction and the vertical direction, the sheet member 6 has a length extending over the entire length of the damping adhesive 4. The damping adhesive 4 is divided into an inner portion 41 (a part of the vibration damping member) inside the vehicle and an outer portion 42 (the other part of the vibration damping member) outside the vehicle by the intervention of the seat member 6. Such an arrangement mode of the sheet member 6 is an example, and the sheet member 6 having a length less than the total length of the damping adhesive 4 in the front-rear direction and the vertical direction may be used, or the vertical wall portion 21 may be used in the thickness direction. , 31 may be embedded in the seat member 6 at a position unevenly distributed on any side.

With reference to FIG. 4, the seat member 6 includes a first facing surface 61 as a side surface inside the vehicle and a second facing surface 62 as a side surface outside the vehicle. The first facing surface 61 is a surface facing the first joint surface 2A via the inner portion 41 of the damping adhesive 4. The second facing surface 62 is a surface facing the damping adhesive 4 via the outer side portion 42. Since the sheet member 6 is arranged inside the damping adhesive 4 in this way, even if the damping adhesive 4 is arranged on the vertical wall portions 21 and 31, the damping adhesive is locked to the sheet member 6 to cause the damping adhesive. The shape of the material 4 is maintained. In particular, even if the damping adhesive 4 is arranged on the vertical wall portions 21 and 31 in a state of having fluidity, the sheet member 6 exerts a shape-retaining action that regulates the flow, and the damping adhesive 4 is prevented from hanging down. NS.

In a preferred embodiment in which the shape-retaining action is exhibited, the first facing surface 61 and the second facing surface 62 of the sheet member 6 are subjected to a frictional force F against the drooping flow of the damping adhesive 4 before the curing treatment such as heating. The surface structure is to generate. In the state where the damping adhesive 4 has fluidity, the damping adhesive 4 tends to hang downward due to the gravity W. However, if the first facing surface 61 and the second facing surface 62 have a frictional force F, the damping adhesive 4 stays on the surfaces of the first facing surface 61 and the second facing surface 62 and hangs down. Can be suppressed. Therefore, even when the damping adhesive 4 is applied to the vertical wall portions 21 and 31 in a state of having fluidity, the frictional force F can prevent the damping adhesive 4 from dripping due to gravity.

Further, a part (inner portion 41) of the damping adhesive 4 is interposed between the first facing surface 61 and the first joint surface 2A of the sheet member 6, and the second facing surface 62 and the second joint surface 3A are interposed. Another part (outer portion 42) of the damping adhesive 4 is interposed between the and. That is, the sheet member 6 does not exist at the joint interface between the first joint surface 2A and the inner portion 41 and the joint interface between the second joint surface 3A and the outer portion 42. Therefore, the arrangement of the sheet member 6 in the damping adhesive 4 has a great influence on the strain accumulating action on the damping adhesive 4 due to the relative displacement between the first joint surface 2A and the second joint surface 3A. No. Therefore, the vibration damping effect of the damping adhesive 4 interposed between the vertical wall portions 21 and 31 is not reduced.

5 (A) and 5 (B) are side views with an enlarged cross-sectional view showing a specific example of a seat member having a shape-retaining action. FIG. 5A shows a sheet member 6A having a surface structure having irregularities on the surface. Concavo-convex portions 63 are formed on the first facing surface 61 and the second facing surface 62 of the sheet member 6A, respectively. The uneven portion 63 is grooved by providing, for example, a large number of linear fine grooves at regular pitches on the first and second facing surfaces 61 and 62, and cross groove processing in which the fine grooves are provided so as to intersect each other. It is formed by roughening the surface, corrugating, and the like. Further, as the sheet to be processed, a thin and flexible sheet made of resin, rubber or the like can be preferably used. When such a sheet member 6A is used, the first and second facing surfaces 61 and 62 rub against the damping adhesive 4 due to the locking effect caused by a part of the material entering the concave portion of the concave-convex portion 63. You will be able to exert your power. Therefore, it is possible to prevent the damping adhesive 4 from hanging down.

FIG. 5B shows a sheet member 6B having a surface structure having pores on the surface. The sheet member 6B is provided with a large number of pores 64 penetrating from the first facing surface 61 to the second facing surface 62. The large number of pores 64 may be in a regular columnar arrangement, a circumferential arrangement, or may be randomly arranged. Further, the size of the pore 64 is selected so that the damping adhesive 4 can easily enter the pore 64, but the diameter is not excessively large. The pores 64 can be formed, for example, by punching using a mold. When such a sheet member 6B is used, the first and second facing surfaces 61 and 62 exert a frictional force against the damping adhesive 4 due to the locking effect caused by a part of the material entering the pores 64. Will come to do. Therefore, it is possible to prevent the damping adhesive 4 from hanging down.

Another preferable sheet member 6 that exerts a frictional force against the damping adhesive 4 is a sheet member made of a non-woven fabric sheet. As the non-woven fabric sheet, a sheet obtained by a manufacturing method such as binding natural fibers such as cotton, linen and pulp and chemical fibers such as polyester, polypropylene, acrylic fiber and aramid fiber with an adhesive resin or mechanically entwining them. Can be used. The preferred sheet thickness is about 0.1 mm to 5 mm. Generally, the non-woven fabric sheet has a rough surface and is lightweight and flexible. Therefore, in the case of the sheet member 6 made of a non-woven fabric sheet, the first and second facing surfaces 61 and 62 can naturally exert a frictional force against the damping adhesive 4 and do not increase the mass so much, and the damping adhesive is applied. The rigidity of the material 4 is not changed. Therefore, it is possible to prevent the damping adhesive 4 from hanging down and to exhibit a target vibration damping effect.

[Example of manufacturing method of car body structure]
Subsequently, an example of the manufacturing method of the vehicle body structure 1A described above will be described. FIG. 6 is a process chart showing the procedure of the vehicle body manufacturing method according to the manufacturing method example 1, and FIGS. 7A to 7D are schematic views for explaining each process of the manufacturing method example 1. First, a first coating step M11 is performed in which a part of the damping adhesive 4 is applied to either the first joint surface 2A of the first vehicle body member 2 or the second joint surface 3A of the second vehicle body member 3. When the first coating step M11 is executed, the damping adhesive 4 is in a state of having fluidity. FIG. 7A shows an example in which the inner portion 41 of the damping adhesive 4 is applied to the first joint surface 2A of the first vehicle body member 2. The coating thickness of the inner portion 41 is about half the thickness of the required damping adhesive 4.

Next, the pasting step M12 for sticking the sheet member 6 on a part of the applied damping adhesive 4 is executed. Specifically, as shown in FIG. 7B, the first facing surface 61 of the sheet member 6 is attached onto the inner portion 41 coated in the first coating step M11. Since the adhesiveness of the damping adhesive 4 can be utilized for attaching the sheet member 6, no other adhesive or the like is required. If necessary, the sheet member 6 may be subjected to a coating treatment or the like to enhance the adhesiveness.

Subsequently, the second coating step M13 for coating the other part of the damping adhesive 4 on the second facing surface 62 of the sheet member 6 is executed. FIG. 7C is a diagram showing an execution status of the second coating step M13. Here, a state in which the outer portion 42 of the damping adhesive 4 is applied to the second facing surface 62 is shown.

After that, the bonding step M14 for adhering the second joint surface 3A of the second vehicle body member 3 to the damping adhesive 4 is executed. FIG. 7D is a diagram showing an execution status of the bonding step M14. The second joint surface 3A is adhered on the outer portion 42 coated in the second coating step M13. When the first coating step M11 is performed on the second vehicle body member 3, the outer portion 42 of the damping adhesive 4 is first coated on the second joint surface 3A, the sheet member 6 is attached, and the inner portion 41 is attached. The coating is sequentially performed, and the first joint surface 2A of the first vehicle body member 2 is adhered onto the coating.

After the bonding step M14, the cleaning step M15 of the vehicle body structure 1A and the electrodeposition coating step M16 of the rust preventive agent are sequentially performed. The cleaning step M15 is a step of cleaning the surface of the vehicle body structure 1A coated with the rust preventive agent. A predetermined cleaning liquid is sprayed on the surface of the vehicle body 1 including the vehicle body structure 1A. The electrodeposition coating step M16 is a step of immersing the vehicle body structure 1A in an electrodeposition liquid containing a rust preventive. Specifically, the vehicle body structure 1A and the electrodes are placed in a tank filled with the electrodeposition liquid, and a potential difference is generated between the two to cause a rust preventive layer to be deposited on the surface of the vehicle body structure 1A. Let me.

After that, the paint drying step M17 is executed. The coating / drying step M17 is a step of heating the vehicle body structure 1A having the rust preventive agent layer originally painted in the step M16 at a predetermined temperature for a certain period of time to dry it. In the present embodiment, the coating drying step M17 also serves as a step of curing the damping adhesive 4. That is, the heat applied to the vehicle body structure 1A for drying the rust preventive layer is utilized as the heat for curing the damping adhesive 4. As a result, the number of heat treatment steps in the vehicle body manufacturing can be reduced, and the manufacturing efficiency can be improved.

According to the vehicle body manufacturing method according to the above manufacturing method Example 1, the laminated structure constituting the vehicle body structure 1A is formed of the first vehicle body member 2, the inner portion 41 of the damping adhesive 4, the seat member 6, and the damping adhesive 4. It can be manufactured in a form in which the outer portions 42 are sequentially laminated. Therefore, the vehicle body structure 1A can be easily manufactured in the normal manufacturing process of the vehicle body.

FIG. 8 is a process chart showing the procedure of the vehicle body manufacturing method according to the manufacturing method example 2, and FIGS. 9A to 9D are schematic views for explaining each process of the manufacturing method example 2. First, a preparatory step M21 for preparing the damping adhesive 4 having fluidity before the curing treatment is performed. FIG. 9A is a diagram showing an example of the preparation step M21, showing an example in which the liquid damping adhesive 40 is housed in the immersion tank 44 having a size that allows the sheet member 6 to be taken in and out. ..

Next, the bonding step M22 of immersing the sheet member 6 in the liquid damping adhesive 40 and adhering the damping adhesive 4 to the first facing surface 61 and the second facing surface 62 of the sheet member 6 is executed. FIG. 9B shows a state in which the sheet member 6 is being immersed in the damping adhesive 40 in the immersion tank 44. The sheet member 6 is immersed in the damping adhesive 40 over its entire length.

FIG. 9C shows a state in which the sheet member 6 immersed in the damping adhesive 40 is pulled up from the inside of the immersion tank 44. A part of the damping adhesive 4 (inner side 41) adheres to the first facing surface 61 of the pulled-up sheet member 6, and the other part (outside) of the damping adhesive 4 adheres to the second facing surface 62. It is a laminated body 4M to which the part 42) is attached. That is, the damping adhesive 4 adheres to each of the facing surfaces in a layered manner due to the locking force of the first and second facing surfaces 61 and 62.

Subsequently, the bonding step M23 for adhering the first vehicle body member 2 and the second vehicle body member 3 via the laminated body 4M is performed. FIG. 9D is a diagram showing an execution status of the bonding step M23. The laminated body 4M obtained in FIG. 9C is sandwiched between the first joint surface 2A of the first vehicle body member 2 and the second joint surface 3A of the second vehicle body member 3. Then, the first joint surface 2A is adhered to the inner portion 41 of the laminated body 4M, and the second joint surface 3A is adhered to the outer portion 42. After that, the cleaning step M24, the electrodeposition coating step M25, and the drying step M26 are sequentially performed in the same manner as the steps M15 to M17 of Production Method Example 1.

According to the vehicle body manufacturing method according to the above manufacturing method Example 2, the damping adhesive 4 is attached to the first and second facing surfaces 61 and 62 of the seat member 6 at once by the attachment step M22, and the damping adhesive 4 is attached to the obtained laminate 4M at once. On the other hand, the vehicle body structure 1A is manufactured by performing the bonding step 23. That is, the vehicle body structure 1A including the first vehicle body member 2, the second vehicle body member 3, the damping adhesive 4 and the seat member 6 can be manufactured in a small number of steps.

[Example of application to side sill]
Subsequently, an example in which the vehicle body structure and the vehicle body manufacturing method of the present invention are applied to the manufacturing of the side sill 15 shown in FIGS. 1 and 2 will be shown. FIG. 10 is a cross-sectional view of the side sill 15 having a closed cross-sectional structure, and FIG. 11 is a perspective view of a reinforcing member 70 arranged in the closed cross section of the side sill 15. The postures of the side sill 15 and the reinforcing member 70 shown in FIGS. 10 and 11 are the same as the assembled postures after the vehicle is completed.

The side sill 15 includes a side sill inner 151 (first vehicle body member) which is an inner frame of the vehicle, a side sill outer 152 which is an outer frame of the vehicle, and a side sill rain 153 arranged between the side sill inner 151 and the side sill outer 152. It is provided with a reinforcing member 70 (second vehicle body member) that reinforces the rigidity of the side sill 15.

The side sill inner 151 is a member that forms a closed cross section, and is formed in a substantially hat-like cross section so as to bulge inside the vehicle. The most bulging portion of the side sill inner 151 inside the vehicle is the vertical wall portion 154 extending in the vertical direction. On the other hand, the side sill rain 153 and the side sill outer 152 are formed in a hat shape in cross section so as to bulge outward from the vehicle. The side sill inner 151, the side sill rain 153, and the side sill outer 152 are superposed and joined at both ends in the vertical direction of the vehicle body.

By this joining, the side sill 15 includes an inner closed cross section C1 formed by the side sill inner 151 and the side sill rain 153, and an outer closed cross section C2 formed by the side sill outer 152 and the side sill rain 153. The reinforcing member 70 is arranged in the inner closed cross section C1. By arranging the reinforcing member 70, the inner closed cross section C1 and the outer closed cross section C2 are prevented from losing their shape.

The reinforcing member 70 includes a first partition surface portion 71 and a second partition surface portion 72 that serve as partition walls for partitioning the inner closed cross section C1, and a connecting portion 73 that connects the outer end portions of the partition surface portions 71 and 72 in the vehicle front-rear direction. Has. The first partition surface portion 71 is provided with a first flange portion 74 on the side side portion inside the vehicle, a second flange portion 75 on the upper side portion, and a third flange portion 76 on the lower side portion. Similarly, the second partition surface portion 72 is provided with the first flange portion 74, the second flange portion 75, and the third flange portion 76. The first flange portion 74 is provided with a joint surface 74A recessed on the outside of the vehicle in order to arrange the damping adhesive 4 described later.

The first flange portion 74 is formed with a spot joint portion SW to be joined to the vertical wall portion 154 of the side sill inner 151. The hat-shaped side sill rain 153 has a vertical wall portion 153A, an upper horizontal wall 153B, and a lower horizontal wall 153C. A spot joint SW is formed to join the connecting portion 73 of the reinforcing member 70 to the vertical wall portion 153A, the second flange portion 75 to the upper horizontal wall 153B, and the third flange portion 76 to the lower horizontal wall 153C. Further, the joint surface 74A (second joint surface) of the first flange portion 74 and the joint surface 154A (first joint surface) of the vertical wall portion 154 are bonded by a damping adhesive 4 interposed between the two. .. The vibration applied to the side sill 15 is damped by the presence of the damping adhesive 4.

Inside the damping adhesive 4, a sheet member 6 is embedded to maintain the shape of the damping adhesive 4. The damping adhesive 4 is arranged between the vertical wall portion 154 extending in the vertical direction and the first flange portion 74. Therefore, if the damping adhesive 4 is arranged in a state of having fluidity between the two, the damping adhesive 4 may hang down due to gravity. However, since the sheet member 6 is arranged inside the damping adhesive 4, the shape of the damping adhesive 4 is maintained by the shape-retaining action of the sheet member 6. Therefore, the damping adhesive 4 is prevented from hanging down.

In addition to FIG. 11, a method for manufacturing the side sill 15 will be described with reference to FIGS. 12 (A) and 12 (B). Here, a manufacturing method based on the manufacturing method Example 1 shown in FIGS. 6 and 7 is shown. FIG. 11 is also a diagram showing an execution status of the first coating step M11 and the sheet member 6 pasting step M12 in the manufacturing process of the side sill 15. In the first coating step M11, the damping adhesive 4 having a thickness corresponding to the outer portion 42 of the damping adhesive 4 is applied to the joint surfaces 74A each of the pair of first flange portions 74 of the reinforcing member 70. Then, in the pasting step M12, the sheet member 6 is pasted on the coated outer portion 42.

Next, the second coating step M13 for coating the inner portion 41 of the damping adhesive 4 on the sheet member 6 is performed. FIG. 12A is a diagram showing an execution status of the second coating step M13. The second facing surface 62 of the sheet member 6 is adhered to the outer portion 42 of the damping adhesive 4 by the previous pasting step M12. On the other hand, the inner portion 41 of the damping adhesive 4 applied in the second coating step M13 is supported on the first facing surface 61 of the sheet member 6.

Subsequently, the bonding step M14 for adhering the reinforcing member 70 to the side sill 15 via the damping adhesive 4 is executed. FIG. 12B is a diagram showing an execution status of the bonding step M14. A joint surface 154A, which is an inner side surface of the vertical wall portion 154 of the side sill inner 151, is adhered to the inner portion 41 of the damping adhesive material 4. The layer of the damping adhesive 4 composed of the inner portion 41 and the outer portion 42 is a layer extending vertically, but since the sheet member 6 exerts a shape-retaining action, the damping adhesive 4 hangs down even when it has fluidity. There is no such thing.

After that, the joint body of the side sill inner 151 and the reinforcing member 70 is joined to the side sill rain 153. This joining is achieved by spot welding the connecting portion 73 of the reinforcing member 70 to the vertical wall portion 153A, the second flange portion 75 to the upper horizontal wall 153B, and the third flange portion 76 to the lower horizontal wall 153C. In reality, the side sill outer 152 is also joined to the joint.

[Example of application to roof rails]
Next, an example in which the vehicle body structure and the vehicle body manufacturing method of the present invention are applied to the manufacturing of the roof rail 11 shown in FIGS. 1 and 2 will be shown. FIG. 13 is a cross-sectional view of the roof rail 11 having the closed cross section C3, and FIG. 14 shows the side surface of the roof gusset 80 (second vehicle body member / reinforcing member) arranged in the closed cross section C1 of the roof rail 11 from the vehicle interior side. It is a figure. FIG. 15 is a perspective view of the roof gusset 80 alone. The postures of the roof rail 11 and the roof gusset 80 shown in FIGS. 13 and 14 are the assembled postures after the vehicle is completed.

The roof rail 11 is a vehicle body rigid member having a closed cross section C1 extending in the front-rear direction of the vehicle, and includes a roof rail inner 111 (first vehicle body member) which is an inner frame of the vehicle, a roof rail outer 112 which is an outer frame of the vehicle, and a roof rail inner 111. It is provided with a roof rail rain 113 disposed between the roof rail outer 112 and a roof gusset 80 (second vehicle body member) that reinforces the rigidity of the closed cross section C3 at the connecting portion between the roof rail 11 and the center pillar 13. ..

The roof rail inner 111 extends in the vertical direction and has a vertical wall portion 114 facing the roof gusset 80. The roof rail outer 112 and the roof rail rain 113 are formed in the shape of a cross-section hat that bulges diagonally upward from the outside of the vehicle. The roof rail outer 112 has a flange portion 112A at the inner end portion of the upper portion of the roof rail outer 112. The flange portion 112A is joined to the vehicle inner end portion 113A of the roof rail rain 113 together with the end portion of the roof panel 191 by spot welding. The end portion of the roof corner gusset 192 is joined to the vertical wall portion 114 of the roof rail inner 111 by spot welding.

The center pillar 13 includes a center pillar inner 131 which is an inner frame of the vehicle, a center pillar outer 132 which is an outer frame of the vehicle, and a center pillar rain 133 arranged between the center pillar inner 131 and the center pillar rain 133. include. The lower end 111A of the roof rail inner 111 is joined to the upper end 131A of the center pillar inner 131 by spot welding. In FIG. 14, the spot joint SW is indicated by a cross. The roof rail outer 112 and the center pillar outer 132 are configured by an integrated outer panel. The upper end portion 133A of the center pillar rain 133 is joined to the vehicle outer bulging portion of the roof rail rain 113.

The roof gusset 80 includes a base 81, a pair of joint wall portions 82, a pair of connecting portions 83, an upper flange portion 84, a lower flange portion 85, and a pair of horizontal flange portions 86. The base 81 is made of a flat plate extending in the front-rear direction and the up-down direction. The pair of joint wall portions 82 are connected in series before and after the base portion 81, respectively. The joint wall portion 82 is a flat plate portion arranged at a position offset inward in the vehicle width direction with respect to the base portion 81. The connecting portion 83 is a substantially triangular flat plate portion extending outward from the side edge of the joint wall portion 82. The upper flange portion 84 is a flange portion extending inward from the upper end of the base portion 81. The lower flange portion 85 is a flange portion extending from the lower end of the base portion 81 to the outside of the vehicle. The horizontal flange portion 86 is a flange portion extending from the edge of the connecting portion 83.

The upper flange portion 84, the lower flange portion 85, and the pair of horizontal flange portions 86 of the roof gusset 80 are joined to the roof rail rain 113 by spot welding, respectively. Further, the pair of joint wall portions 82 are joined to the vertical wall portion 114 of the roof rail inner 111 via the damping adhesive 4. Specifically, the joint surface 82A (second joint surface), which is the inner side surface of the joint wall portion 82, and the joint surface 114A (first joint surface), which is the outer side surface of the vertical wall portion 114, are in the vehicle width direction. We are facing each other with a gap in the car. The two joint surfaces 82A and 114A are bonded by a damping adhesive 4 interposed between the two joint surfaces 82A and 114A. The intervention of the damping adhesive 4 damps the vibration applied to the roof rail 11 or the center pillar 13.

Inside the damping adhesive 4, a sheet member 6 is embedded to maintain the shape of the damping adhesive 4. The damping adhesive 4 is arranged between the vertical wall portion 114 extending in the vertical direction and the joint wall portion 82. Therefore, if the damping adhesive 4 is arranged in a state of having fluidity between the two, the damping adhesive 4 may hang down due to gravity. However, since the sheet member 6 is arranged inside the damping adhesive 4, the shape of the damping adhesive 4 is maintained by the shape-retaining action of the sheet member 6. Therefore, the damping adhesive 4 is prevented from hanging down.

16 (A) to 16 (C) are side views for explaining a method of manufacturing the roof rail 11. Here, too, a manufacturing method based on the manufacturing method Example 1 shown in FIGS. 6 and 7 is shown. FIG. 16A is a diagram showing an execution status of the first coating step M11 and the sheet member 6 pasting step M12 in the roof rail 11 manufacturing process. In the first coating step M11, the damping adhesive 4 having a thickness corresponding to the outer portion 42 of the damping adhesive 4 is applied to the joint surfaces 82A each of the pair of joint wall portions 82 of the roof gusset 80. Then, in the pasting step M12, the sheet member 6 is pasted on the coated outer portion 42.

Next, the second coating step M13 for coating the inner portion 41 of the damping adhesive 4 on the sheet member 6 is performed. FIG. 16B is a diagram showing an execution status of the second coating step M13. The second facing surface 62 of the sheet member 6 is adhered to the outer portion 42 of the damping adhesive 4 by the previous pasting step M12. On the other hand, the inner portion 41 of the damping adhesive 4 applied in the second coating step M13 is supported on the first facing surface 61 of the sheet member 6.

Subsequently, the bonding step M14 for adhering the roof gusset 80 to the roof rail inner 111 via the damping adhesive 4 is executed. FIG. 16C is a diagram showing an execution status of the bonding step M14. The joint surface 114A of the vertical wall portion 114 of the roof rail inner 111 is adhered to the inner portion 41 of the damping adhesive material 4. The layer of the damping adhesive 4 composed of the inner portion 41 and the outer portion 42 is a layer extending vertically as shown in FIG. 13, but since the sheet member 6 exerts a shape-retaining action, the damping adhesive 4 is fluid. It does not hang down even in the state of having.

After that, the joint body of the roof rail inner 111 and the roof gusset 80 is joined to the roof rail rain 113. As described above, this joint is achieved by spot welding the upper flange portion 84, the lower flange portion 85, and the pair of horizontal flange portions 86 of the roof gusset 80 to the roof rail rain 113 (of the second joint portion). Formation). In reality, the roof rail outer 112 is also joined to the joint.

[Modification example]
Although the embodiments of the present invention have been described above, the present invention is not limited thereto. For example, although a manufacturing example of the roof rail 11 and the side sill 15 is shown as a specific application example of the vehicle body manufacturing method in the present invention, another vehicle body structure having a closed cross-sectional structure such as a front pillar 12, a center pillar 13, and a cross member 17 is shown. It may be applied to the body. Further, the present invention may be applied to assembling vehicle body members having no closed cross-sectional structure, for example, manufacturing a vehicle body structure for joining three flat plate members.

In the above embodiment, an embodiment in which the rust preventive drying steps M17 and M26 are used as the step of curing the damping adhesive 4 is illustrated. Instead of this, a heating step for curing the damping adhesive 4 may be performed separately. For example, the curing step of the damping adhesive 4 may be performed before the cleaning step M5.

1 Body 1A Body structure 11 Roof rail 111 Roof rail inner (1st body member)
114 Vertical wall part 114A Joint surface (first joint surface)
15 Side sill 151 Side sill inner (first body member)
154 Vertical wall part 154A Joint surface (first joint surface)
2 1st body member 2A 1st joint surface 3 2nd body member 3
3A 2nd joint surface 4 Damping adhesive (vibration damping member)
41 Inner part (part of vibration damping member)
42 Outer part (other part of vibration damping member)
4M Laminated body 4M
5 Third body member 5
6, 6A, 6B Seat member 61 1st facing surface 62 2nd facing surface 63 Concavo-convex part 64 Pore 70 Reinforcing member (2nd body member)
74 1st flange 74A Joint surface (2nd joint surface)
80 Roof Gazette (2nd body member / reinforcement member)
82 Joint wall part 82A Joint surface (second joint surface)
C closed section

Claims (8)

A first vehicle body member having a vertical wall portion having a first joint surface,
A second vehicle body member having a second joint surface facing the first joint surface,
A vibration damping member interposed between the two joint surfaces so as to bond the first joint surface and the second joint surface.
A seat member arranged inside the vibration damping member for shape retention of the vibration damping member is provided.
The sheet member has a first facing surface facing the first joint surface via a part of the vibration damping member, and a second facing surface facing the second joint surface via another part of the vibration damping member. The vehicle body structure is characterized by having two facing surfaces. In the vehicle body structure according to claim 1,
The vibration damping member is a member having fluidity before the hardening treatment, and is a member having fluidity.
The first facing surface and the second facing surface of the seat member have a surface structure that generates a frictional force against the drooping flow of the vibration damping member, which is a vehicle body structure. In the vehicle body structure according to claim 2.
The surface structure of the first facing surface and the second facing surface is a vehicle body structure having irregularities on the surface. In the vehicle body structure according to claim 2.
The surface structure of the first facing surface and the second facing surface is a surface structure having pores, which is a vehicle body structure. In the vehicle body structure according to claim 2.
The seat member is a vehicle body structure, which is a seat member made of a non-woven fabric sheet. In the vehicle body structure according to any one of claims 1 to 5,
The first vehicle body member is a member that forms a closed cross section.
The second vehicle body member is a vehicle body structure that is a reinforcing member arranged in the closed cross section. The method for manufacturing a vehicle body structure according to any one of claims 1 to 6.
A first coating step of applying a part of the vibration damping member to either the first joint surface of the first vehicle body member or the second joint surface of the second vehicle body member.
A pasting step of pasting the first facing surface of the sheet member on a part of the coated vibration damping member, and
A second coating step of coating the other part of the vibration damping member on the second facing surface of the sheet member, and
An adhesion step of adhering either the second joint surface or the first joint surface onto the other part of the applied vibration damping member.
A method of manufacturing a vehicle body, which comprises the above. The method for manufacturing a vehicle body structure according to any one of claims 1 to 6.
The process of preparing a vibration damping member with fluidity before curing and
The sheet member is immersed in the fluid vibration damping member, a part of the vibration damping member is adhered on the first facing surface, and the other vibration damping member is attached on the second facing surface. Adhesion process to attach a part and
The laminate obtained in the bonding step is sandwiched between the first joint surface of the first vehicle body member and the second joint surface of the second vehicle body member, and the first joint surface and the second joint surface are joined. Adhesion process to bond the surface and
A method of manufacturing a vehicle body, which comprises the above.

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