JP5488373B2 - Roof side rail - Google Patents

Description

  The present invention relates to a roof side rail that is joined to both ends of a vehicle roof panel in the vehicle width direction and extends in the vehicle front-rear direction.

  Conventionally, as shown in the following Patent Document 1, by filling an adhesive as a filler between the outer panel and the reinforcement, it is possible to suppress the center pillar cross-sectional collapse, and to reduce the weight of the vehicle body and the adhesive. For the purpose of providing a vehicle body skeleton member capable of preventing deterioration, an outer panel having a cross-sectional hat shape having a pair of vertical wall portions at both ends of a base, an inner panel forming a closed cross-sectional structure with the outer panel, An outer reinforcement having a cross-sectional hat shape disposed along the outer panel in a closed cross-sectional structure and having a pair of vertical wall portions at both ends of the base, and disposed between the outer reinforcement and the inner panel. Vehicle body skeleton member having inner reinforcement, and only the pair of vertical wall portions in the outer reinforcement is provided. It has been performed to adhesively bonded to the runner reinforcement.

JP 2005-306235 A

  In the vehicle body skeleton member disclosed in the above-mentioned Patent Document 1, when a load of a predetermined value or more is applied to the vehicle body skeleton member from the base side of the outer panel toward the inner panel, the outer rain that faces the outer panel that is greatly deformed. Since the vertical wall portion of the reinforcement and the vertical wall portion of the inner reinforcement are joined and reinforced with an adhesive, the amount of the adhesive can be reduced to reduce the weight of the vehicle body, and the outer panel and the outer There is an advantage that the adhesive can be prevented from deteriorating without being affected by the temperature change from the outside of the vehicle and the intrusion of water as in the case where the adhesive is filled between the reinforcements.

  Then, the structure of the vehicle body skeleton member is applied to a roof side rail of the vehicle, and a plurality of reinforcements are partially overlapped in a closed cross section formed by an outer panel and an inner panel of the roof side rail. It is also conceivable to join the plurality of reinforcements by arranging them in a state and applying adhesives to the top surfaces (vertical wall portions) of the overlapping portions of the reinforcements.

  Overlap of the plurality of reinforcements made of steel plates and the like, which are disposed in a place where spot welding is difficult within the closed cross section formed by the outer panel and inner panel of the roof side rail as described above. The thermosetting adhesive is applied to the part, and the thermosetting adhesive is heated and cured in the undercoating drying process of the vehicle body, thereby bonding the reinforcement overlapping part. In this case, there is a problem that the bonded portion is easily peeled off by heating the vehicle body to a high temperature of about 160 ° C. to 180 ° C. in the subsequent drying process of the top coat.

  That is, when heated to a high temperature in the drying process of the top coat, the vehicle body expands and a distortion of about several millimeters is generated, and the bonded portion formed by the thermosetting adhesive or the like exceeds the glass transition temperature. Since the adhesive strength is extremely lowered by heating, there is a possibility that the adhesive portion peels in accordance with the distortion generated in the vehicle body. In particular, the roof side rail has a lower end portion supported by a plurality of pillars, and a roof panel having a large area is joined to the upper end portion of the vehicle body. There is a problem that the adhesion portions of the plurality of reinforcements arranged in the roof side rail are easily peeled off.

  The present invention has been made in view of the above problems, and is capable of effectively preventing separation of an adhesive portion that joins a plurality of reinforcements disposed in a roof side rail. It is an object.

  The invention according to claim 1 is a roof side rail that is joined to both ends in the vehicle width direction of the roof panel of the vehicle and extends in the front-rear direction of the vehicle, and the roof side rail is a closed section including an outer panel and an inner panel. In the closed cross section, a plurality of reinforcements swelled in a cross-sectional hat shape from the inner panel outward in the vehicle width direction are disposed, and at least a part of the reinforcement Are installed in a state where they are overlapped with each other, and the plurality of reinforcements are connected to each other by the top surface of the bulging portion having the cross-sectional hat shape located at the overlapping portion and the adhesive portions provided on both upper and lower surfaces thereof. It has been joined.

  According to a second aspect of the present invention, in the roof side rail according to the first aspect, the adhesive portion is continuously provided across the top surface of the bulged portion having the cross-sectional hat shape and the upper and lower surfaces thereof. is there.

  According to a third aspect of the present invention, in the roof side rail according to the first or second aspect, an intermediate portion in the front-rear direction of the roof side rail installed between the B pillar and the C pillar provided on the side portion of the vehicle body. Are provided with the above-mentioned overlapping portion.

  The invention according to claim 4 is the roof side rail according to any one of claims 1 to 3, wherein at least one of the plurality of reinforcements having the overlapping portion is overlapped. It installs so that it may extend toward a vehicle rear side from a part, and another reinforcement is installed so that it may extend toward the vehicle front side from the said superimposition part.

  According to a fifth aspect of the present invention, in the roof side rail according to the fourth aspect, the second reinforcement installed so as to extend toward the front side of the vehicle from the overlapped portion is located behind the overlapped portion of the vehicle. It is arrange | positioned rather than the 1st reinforcement installed so that it may extend toward the side in the vehicle width direction outer side.

  The invention according to claim 6 is the roof side rail according to any one of claims 1 to 5, further comprising a lower flange extending downward from a lower end portion of the reinforcement, wherein the lower flange is overlapped with the overlap. It is welded to the outer panel of the roof side rail at a position corresponding to the mating portion.

  The invention according to claim 7 is the roof side rail according to any one of claims 1 to 6, further comprising an upper flange extending inward in the vehicle width direction from an upper end portion of the reinforcement. The upper flange is welded to the side edge of the roof panel at a position spaced from the overlapping portion.

  In the invention according to claim 1, the plurality of reinforcements are installed in a state where at least a part of the reinforcements are overlapped with each other, and the top surface of the bulging portion having the cross-sectional hat shape located in the overlapping portion and its upper and lower sides Since the plurality of reinforcements are joined to each other by the adhesive portions provided on both sides, the vehicle body on which the roof side rail is assembled is transported to the drying process of the top coat, and the temperature is about 160 ° C. to 180 ° C. Even when heated, there is an advantage that it is possible to effectively prevent peeling of the bonded portion by the adhesive.

  In the invention which concerns on Claim 2, since the said adhesion part is continuously provided over the top surface of the said cross-sectional hat-shaped bulging part, and its upper and lower surfaces, while being able to perform the installation operation | work of this adhesion part easily There is an advantage that the overlapping portions of the reinforcements can be effectively joined by the bonding portion.

  In the invention according to claim 3, the roof side rail is provided because the overlapping portion is disposed in the front-rear direction intermediate portion of the roof side rail installed between the B pillar and the C pillar provided on the side portion of the vehicle body. A plurality of reinforcements arranged in the interior effectively prevent the intermediate portion of the roof side rail in the front-rear direction between the B pillar and the C pillar, which are required to have a predetermined strength due to the structure of the vehicle body. There is an advantage that it can be reinforced.

  In the invention according to claim 4, among the plurality of reinforcements having the overlapping portion, at least one of the reinforcements is installed so as to extend from the overlapping portion toward the vehicle rear side, and another reinforcement is provided. Are installed so as to extend from the overlapping portion toward the front side of the vehicle, so that the roof side rails having a predetermined length extending in the front-rear direction of the vehicle are provided without increasing the overall length of each reinforcement. Reinforcement can effectively reinforce.

  In the invention according to claim 5, the second reinforcement installed so as to extend toward the vehicle front side from the overlapping portion is used as the first rain installed so as to extend toward the vehicle rear side from the overlapping portion. Since the first rain force is mounted on the inner panel of the roof side rail to form the rear pillar inner assembly, and the second rain force is mounted on the roof side rail. There is an advantage that the roof side rail 1 can be assembled by combining them after being attached to the outer panel or the like to constitute the side frame assembly.

  In the invention according to claim 6, a lower flange extending downward from the lower end portion of the reinforcement is provided, and the lower flange is welded to the outer panel of the roof side rail at a position corresponding to the overlapping portion. There is an advantage that the bonding portion provided in the overlapping portion can be effectively reinforced, and peeling of the bonding portion can be more effectively prevented.

  In the invention according to claim 7, an upper flange extending inward in the vehicle width direction from the upper end portion of the reinforcement is provided, and the upper flange is welded to the side end portion of the roof panel at a position spaced from the overlapping portion. Therefore, the upper flange can be spot welded individually to the outer panel of the roof side rail, the side edge of the roof panel, etc., and the outer panel of the roof side rail and the side edge of the roof panel. Can be effectively reinforced by the reinforcement.

It is sectional drawing which shows embodiment of the roof side rail which concerns on this invention. It is a perspective view which shows the overlapping part of the 1st, 2nd reinforcement. It is a side view which shows the overlapping part of the 1st, 2nd reinforcement. It is explanatory drawing which shows the state which looked at the said roof side rail from the vehicle inner side. It is a top view which shows the state which the vehicle body thermally deformed. It is sectional drawing which shows the structure of the test piece which concerns on the example of this invention. It is sectional drawing which shows the structure of the test piece which concerns on a comparative example. It is explanatory drawing which shows the test apparatus used in order to confirm the effect of this invention. It is a graph which shows the test result using the said testing apparatus.

  1 to 3 show an embodiment of a roof side rail 1 according to the present invention. The roof side rails 1 are installed so as to be joined to both ends of the vehicle roof panel 2 in the vehicle width direction and extend in the front-rear direction of the vehicle. The roof side rail 1 has a closed cross-sectional structure constituted by an outer panel 3 and an inner panel 4 made of a steel plate material or the like, and in the closed cross-section, a first extending toward the rear side made of a steel plate material or the like. A reinforcement 5 and a second reinforcement 6 extending toward the front side are disposed.

  The first and second reinforcements 5 and 6 are swelled portions 51 and 61 having a hat-like cross section that bulges outward from the inner panel 4 in the vehicle width direction, and the inner side of the vehicle body from the upper end thereof. And upper flanges 52, 62 projecting from the lower ends of the bulging portions 51, 61 and lower flange portions 53, 63 projecting downward from the lower ends of the bulging portions 51, 61, respectively.

  The first reinforcement 5 extending toward the front side is installed so as to extend forward from the upper end portion of the C pillar 8 disposed in the rear portion of the vehicle compartment on the side portion of the vehicle body. The second reinforcement 6 extending toward the front side is disposed on the outer side in the vehicle width direction with respect to the first reinforcement 5, and the rear end portion of the second reinforcement 6 is Installation of the B pillar 7 disposed in the front-rear direction center of the vehicle compartment on the front side of the vehicle, that is, on the side of the vehicle body, in a state of being overlapped with the front end portion of the first reinforcement 5 over a predetermined range K. It is installed to extend toward the part.

  The first and second reinforcements 5, 6 extend over the top surfaces 54, 64 of the bulging portions 51, 61 located at the overlapping portion K of both, and the upper surfaces 55, 65 and the lower surfaces 56, 66. They are joined to each other through an adhesive portion 9 formed by continuously applying an adhesive. As the adhesive, for example, an epoxy thermosetting adhesive that cures at a temperature of about 140 ° C. is used, but the adhesive is not limited thereto.

  When manufacturing a vehicle body provided with the roof side rail 1, the first reinforcement 5 is first attached to the inner panel 4 of the roof side rail 1 to form a rear pillar inner assembly, and the second reinforcement is provided. The attachment 6 is attached to the outer panel 3 or the like of the roof side rail 1 to constitute a side frame assembly.

  Subsequently, the top surface 64 of the bulging portion 61 of the second reinforcement 6 located at the overlapping portion K of the first and second reinforcements 5 and 6, and the upper surface 65 and the lower surface 66 are continuous. After the adhesive portion 9 is formed by applying an adhesive, the predetermined positions of the rear pillar inner assembly and the side frame assembly are joined together by spot welding, and at the upper end thereof, the side edge of the roof panel 2 is joined. The parts are joined together by spot welding.

  Specifically, the upper flanges 52 of the second reinforcements 5 and 6 are overlapped with the lower surface of the upper flange 31 provided on the upper part of the outer panel 3 of the roof side rail 1 and the roof panel. The two side end portions are spot welded together. In addition, the four panel members comprising both the upper flanges 52 and 62 of the first and second reinforcements 5 and 6 and the upper flange 31 of the outer panel 3 and the side edges of the roof panel 2 are integrally spotted. It is difficult to weld.

  For this reason, the upper flange 52 provided so as to extend inward in the vehicle width direction from the upper end of the swelled portions 51 and 61 having a hat-like cross section provided in the first and second reinforcements 5 and 6. 62 are spot welded individually to the outer panel 3 of the roof side rail 1 and the side edge of the roof panel 2 at positions separated from the overlapping portion K (see W1 in FIG. 2). Further, as shown in FIG. 4, a notch 44 is formed in a portion of the upper flange 42 provided at the upper end portion of the inner panel 4 of the roof side rail 1 at the spot welding location W1.

  Further, the lower flange portions 53 and 63 of the first and second reinforcements 5 and 6 are spot welded to the lower flange 32 provided at the lower end portion of the outer panel 3 of the roof side rail 1 in the overlapping portion K. (See W2 in FIG. 2). The lower flange 43 provided at the lower end portion of the inner panel 4 of the roof side rail 1 has a notch portion 45 in which a portion located in the overlapping portion K is notched over a predetermined range as shown in FIG. Is formed. As a result, it is possible to spot weld (W2) the three panel materials composed of the lower flange portions 53 and 63 of the first and second reinforcements 5 and 6 and the outer panel 3 of the roof side rail 1 together. Yes.

  After the vehicle body on which the roof side rails 1 have been assembled in this way is transported to the undercoating process and subjected to the undercoating, the first and second rains are heated by heating to a predetermined temperature in the drying process of the undercoating. The adhesive portion 9 formed by applying a thermosetting adhesive to the overlapping portions K of the reinforcements 5 and 6 is cured, and the first and second reinforcements 5 and 6 are the overlapping portions. Bonded firmly at K. Thereafter, the vehicle body is sequentially transported to an intermediate coating process and a top coating process to be subjected to intermediate coating and top coating.

  In the closed cross section of the roof side rail 1 constituted by the outer panel 3 and the inner panel 4 as described above, a bulging portion 51 bulged from the inner panel 4 outward in the vehicle width direction in a cross-sectional hat shape, The first and second reinforcements 5 and 6 having 61 are disposed and installed in a state in which at least a part of the reinforcements 5 and 6 are overlapped with each other, and located in the overlapping portion K. The first and second reinforcements 5 and 6 are applied by applying an adhesive to the top surfaces 54 and 64 of the bulging portions 51 and 61 having a hat-shaped cross section and upper and lower surfaces 55, 56, 65 and 66, respectively. Since the bonding portion 9 is provided to adhere to each other, the vehicle body on which the roof side rail 1 is assembled is transported to a drying process of top coating and heated to a high temperature of about 160 ° C. to 180 ° C. Even in this case, there is an advantage that the adhesive portion 9 can be effectively prevented from peeling off.

  That is, the vehicle body expands from the initial state shown by the solid line in FIG. 5 to the virtual line as it is heated to a high temperature in the drying process of the top coat. The roof side rail 1 has a lower end portion supported by a plurality of pillars 7 and 8 and the like, and a roof panel 2 having a large area in the vehicle body is joined to the upper end portion. As a result, a stress O that causes the front end portion and the rear end portion to expand greatly acts, and according to this, an attempt is made to distort the adhesive portions 9 of the first and second reinforcements 5 and 6 in the peeling direction. Stress is generated. Therefore, when the adhesive part 9 is composed of a thermosetting adhesive, the adhesive part 9 is heated to a temperature higher than the glass transition temperature after being cured, so that the adhesive strength is extremely lowered and the cross-sectional hat shape is obtained. If the adhesive portions are provided only on the top surfaces 54 and 64 of the bulged portions 51 and 61 formed as described above, it is inevitable that the adhesive portions easily peel off according to the stress acting on the vehicle body.

  On the other hand, as described above, the top surfaces 54 and 64 of the cross-sectional hat-shaped bulged portions 51 and 61 located at the overlapping portion K of the first and second reinforcements 5 and 6 and the upper and lower surfaces 55 and In the case where the adhesive portions 9 are provided at 56, 65, and 66, respectively, the stress acting in the direction in which the adhesive portions 9 provided on the top surfaces 54 and 64 of the bulging portions 51 and 61 are peeled off is caused by the bulging. The adhesive portion 9 is effectively absorbed by acting in the shearing direction of the adhesive portion 9 provided on the upper and lower surfaces 55, 56, 65 and 66 of the portions 51 and 61. Therefore, even when the vehicle body is heated to a high temperature and the roof panel 2 is largely thermally deformed, and the effect thereof acts on the roof side rail 1, the overlapping portion K of the first and second reinforcements 5 and 6 is applied. It is possible to effectively prevent the occurrence of the situation where the adhesive portion 9 provided on the surface peels off, and stably maintain the bonding strength of the first and second reinforcements 5 and 6 in the overlapping portion K. it can.

  Test examples conducted for confirming the above effects will be described below. First, as shown in FIG. 6, the top surfaces 54 and 64 of the above-described hat-shaped bulged portions 51 and 61 located at the overlapping portion K of the first and second reinforcements 5 and 6, and both upper and lower surfaces 55 thereof. , 56, 65, and 66, each having a bonding portion 9 having a thickness of about 2 mm, and a test piece S1 according to an example of the present invention, and a bulging portion 51 formed in the shape of a cross-sectional hat as shown in FIG. , 61 is prepared as a test piece S2 according to a comparative example in which only the top surfaces 54, 64 are provided with an adhesive portion 9 'having a thickness of about 2 mm. Then, as shown in FIG. 8, the test pieces S1 and S2 are supported on the support portions 21 and 22 installed at intervals of 180 mm, as shown in FIG. The weight 23 is suspended and urged downward to measure the deflection generated in the overlapping portion K, and to what extent the load corresponding to the weight 23 becomes, the adhesive portion is peeled off. When a test for confirmation was performed, data as shown in FIG. 9 was obtained.

  From the above data, in the test piece S2 according to the comparative example, a deflection of 0.07 mm occurred when a load of 20 kgf was applied. Then, this was set in an oven at 160 ° C. for 30 minutes, but peeling of the bonded portion 9 was not observed. Therefore, it was confirmed that the adhesive portion 9 'was peeled off. On the other hand, in the test piece S1 according to the example of the present invention, when a load of 70 kgf is applied, it is possible to finally prevent the bending of about 0.07 mm from occurring, compared with the test piece S2 according to the comparative example. It was confirmed that the bonding strength was remarkably increased.

  Instead of the above-described embodiment in which the adhesive portion 9 is continuously provided across the top surfaces 54 and 64 of the bulging portions 51 and 61 having a hat-shaped cross section and the upper and lower surfaces 55, 65, 56 and 66 thereof, It is also possible to intermittently provide adhesive portions on the top surfaces 54, 64 of the protruding portions 51, 61 and the upper and lower surfaces 55, 65, 56, 66 thereof. However, in the case where the adhesive portion 9 is provided continuously over the three surfaces of the bulging portions 51 and 61 as described above, the installation operation of the adhesive portion 9 can be easily performed, and the There is an advantage that the first and second reinforcements 5 and 6 can be firmly bonded by the bonding portion 9.

  In addition, as shown in the above-described embodiment, the overlapping portion K is disposed in the front-rear direction intermediate portion of the roof side rail 1 installed between the B pillar 7 and the C pillar 8 provided on the side portion of the vehicle body. In such a case, a plurality of reinforcements arranged in the roof side rail 1, that is, the first and second reinforcements 5 and 6, provide a predetermined strength in terms of the structure of the vehicle body. There is an advantage that it is possible to effectively reinforce the intermediate portion in the front-rear direction of the roof side rail 1 between the required B pillar 7 and C pillar 8.

  In addition, the 1st reinforcement 5 of the back side installed so that it may extend toward the vehicle rear side from the said superimposition part K, and the front installed so that it may extend toward the vehicle front side from the said superimposition part K Instead of the above-described embodiment in which the second reinforcement 6 on the side is disposed in the closed section of the roof side rail 1, a structure in which three or more reinforcements are disposed in the closed section may be employed.

  Then, as described above, a part of the plurality of reinforcements composed of the first and second reinforcements 5, 6 and the like are installed in a state of being overlapped with each other, and the front and rear side of the vehicle from the overlapping portion K When the installation is made so as to extend toward the vehicle, the roof side rails 1 having a predetermined length extending in the front-rear direction of the vehicle are provided with the plurality of reinforcements without increasing the overall length of each reinforcement. Can be effectively reinforced with a mentament.

  Moreover, as shown in the said embodiment, the 2nd reinforcement 6 installed so that it may extend toward the vehicle front side from the superimposition part K is installed so that it may extend toward the vehicle rear side from the said superimposition part K. When the first reinforcement 5 is disposed on the outer side in the vehicle width direction, the rear first reinforcement 5 is attached to the inner panel 4 of the roof side rail 1 to constitute the rear pillar inner assembly. In addition, after the second reinforcement 6 on the front side is attached to the outer panel 3 of the roof side rail 1 to form a side frame assembly, the roof side rail 1 can be assembled by combining them. .

  Further, as shown in the embodiment, lower flanges 53 and 63 extending downward from the lower ends of the first and second reinforcements 5 and 6 are provided, and the lower flanges 53 and 63 correspond to the overlapping portion K. When it is configured to weld to the lower flange 32 provided on the outer panel 3 of the roof side rail 1 at the position where the welding is performed, the welded portion 9 provided on the overlapping portion K is effectively reinforced by the welded portion. Therefore, there is an advantage that peeling of the bonding portion 9 can be more effectively prevented.

  Moreover, in the said embodiment, the upper flanges 52 and 62 extended in the vehicle width direction inner side from the upper end part of the 1st, 2nd reinforcements 5 and 6 are provided, and this upper flanges 52 and 62 are provided in the said overlapping part K. Since the upper flanges 52 and 62 are individually welded to the outer panel 3 of the roof side rail 1 and the side end portions of the roof panel 2, they are welded to the side end portions of the roof panel 2 at positions separated from the roof panel 2. can do. Therefore, the joint portion between the outer panel 3 of the roof side rail 1 and the side end portion of the roof panel 2 can be effectively reinforced by the first and second reinforcements 5 and 6.

DESCRIPTION OF SYMBOLS 1 Roof side rail 2 Roof panel 3 Outer panel 4 Inner panel 5 1st reinforcement 6 2nd reinforcement 7 B pillar 8 C pillar 9 Adhesive part 51,61 Expansion part 52,62 Upper flange 53,63 Lower flange 54 , 64 Top surface 55, 65 Upper surface 56, 66 Lower surface

Claims (7)

  A roof side rail that is joined to both ends of a vehicle roof panel in the vehicle width direction and extends in the front-rear direction of the vehicle, the roof side rail having a closed cross-sectional structure including an outer panel and an inner panel. Inside, a plurality of reinforcements bulging in a cross-sectional hat shape from the inner panel outward in the vehicle width direction are disposed, and at least a part of the reinforcements are installed in a state of being overlapped with each other In addition, the plurality of reinforcements are joined to each other by the top surface of the bulging portion having a cross-sectional hat shape located in the overlapping portion and the adhesive portions provided on both upper and lower surfaces thereof. Roof side rail.   2. The roof side rail according to claim 1, wherein the adhesive portion is continuously provided over a top surface of the bulging portion having a hat-shaped cross section and both upper and lower surfaces thereof.   3. The overlapping portion is disposed at a middle portion in the front-rear direction of a roof side rail installed between a B pillar and a C pillar provided on a side portion of the vehicle body. Roof side rail.   At least one of the plurality of reinforcements having the overlapping portion is installed so as to extend from the overlapping portion toward the vehicle rear side, and the other reinforcement is disposed from the overlapping portion. The roof side rail according to any one of claims 1 to 3, wherein the roof side rail is installed so as to extend toward a vehicle front side.   The second reinforcement installed so as to extend toward the vehicle front side from the overlapping portion is more outward in the vehicle width direction than the first reinforcement installed so as to extend toward the vehicle rear side from the overlapping portion. The roof side rail according to claim 4, wherein the roof side rail is disposed on the side.   The lower flange of the reinforcement has a lower flange extending downward, and the lower flange is welded to the outer panel of the roof side rail at a position corresponding to the overlapping portion. The roof side rail of any one of Claims.   An upper flange extending inward in the vehicle width direction from the upper end portion of the reinforcement is provided, and the upper flange is welded to the side end portion of the roof panel at a position spaced from the overlapping portion. The roof side rail of any one of Claims 1-6.

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