JP2008105450A - Vehicle side structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To restrain generation of stress in spot welding of a bracket and a door for fixing an end part of an impact beam by repetition of opening-closing operation of the door. <P>SOLUTION: The impact beam 28 is arranged inside a front side door 16, and its rear end part 28B is fixed to the bracket 32. A plurality of installation parts 33 are arranged in an upper part and a lower part of the impact beam 28 of the bracket 32, and the installation parts 33 and a plane part 42A of a door inner panel 42 are joined by the spot welding 44A to D. Cushion rubber 52 is arranged above the spot welding 44B of the lower part in the rear of a line L of connecting a position of the spot welding 44B and 44C of the upper part and the lower part of the impact beam 28 on the inside in the vehicle width direction of the door inner panel 42. The cushion rubber 52 is arranged on the opposite side of a front side weatherstrip 54 by sandwiching the spot welding 44. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicle side part structure provided with an impact beam along a vehicle front-rear direction inside a door.

Patent Document 1 below discloses a structure in which a door stopper is disposed at a position that overlaps an end where the reinforcement on the vehicle body side and the door receiving surface are joined in order to regulate the position when the side door is closed. .
JP 2003-81137 A

  However, in the case of the above prior art, when the opening / closing operation of the side door is repeated, stress is generated at the spot welded portion between the bracket of the impact beam and the inner panel.

  In other words, since the impact beam has inertia, it is displaced toward the vehicle interior even when the side door is closed. On the other hand, since the inner panel is deformed to the outside of the passenger compartment by the input from the weather strip (the reaction force of the weather strip), stress is generated at the spot welded portion of the bracket and the inner panel.

  In view of the above-described facts, the present invention has an object to obtain a vehicle side part structure that can reduce stress generated in a spot welded portion between a bracket of an impact beam and a side door even when the side door is opened and closed repeatedly.

  The vehicle side part structure according to the invention of claim 1 is provided so as to be openable and closable with respect to the body body, a door whose inner edge in the vehicle width direction opposes the body body when closed, An impact beam arranged along a direction, a bracket that is spot-welded at the upper and lower portions of the impact beam inside the door in the vehicle width direction, and fixes the rear end portion of the impact beam; and the upper portion Attached to at least one of the edge portion above the spot welding position of the lower body and the edge portion of the body main body facing the edge portion of the body body. And an impact relaxation member that abuts against the edge side or the body body side when the door is closed.

  According to a second aspect of the present invention, in the vehicle side part structure according to the first aspect, the impact mitigating member is disposed below the spot welding position of the upper portion with respect to the vehicle vertical direction.

  According to a third aspect of the present invention, in the vehicle side portion structure according to the first or second aspect, a weather strip is provided on the inner side in the vehicle width direction of the door, and the front side of the vehicle sandwiches the spot welding position of the bracket. A weather strip is disposed, and the impact reducing member is disposed on the vehicle rear side.

  According to a fourth aspect of the present invention, in the vehicle side part structure according to any one of the first to third aspects, the impact mitigating member is attached to the edge portion, and the impact mitigation is performed when the door is closed. The member is in contact with the body body.

  According to a fifth aspect of the present invention, in the vehicle side part structure according to any one of the first to third aspects, the impact mitigating member is attached to the body body, and the impact mitigation is performed when the door is closed. The member is in contact with the edge portion.

  According to a sixth aspect of the present invention, in the vehicle side part structure according to any one of the first to fifth aspects, the impact relaxation member is a cushion rubber.

  According to the first aspect of the present invention, the door is provided so as to be openable and closable with respect to the body main body, and when the door is closed, the inner edge of the door in the vehicle width direction faces the body main body. Inside the door, an impact beam for suppressing deformation of the door at the time of a side collision is arranged along the vehicle front-rear direction. Inside the door in the vehicle width direction, a bracket is spot welded at least at the top and bottom of the impact beam, and the rear end of the impact beam is fixed to the bracket. At least one of the edge part of the door and the edge part of the body main body is provided with an impact relaxation member at the rear of the vehicle from the line connecting the upper and lower spot welding positions and above the lower spot welding position. It is attached, and when the door is closed, the impact reducing member abuts against the edge side or the body body side.

  In general, the impact beam is displaced toward the vehicle interior because it has inertia even when the door is closed, and the inner edge of the door in the vehicle width direction is input by a weather strip or the like. Due to the deformation to the outside of the passenger compartment, the relative displacement between the inside of the door in the vehicle width direction and the bracket of the impact beam tends to be large. According to the present invention, when the door is closed, the impact mitigating member is behind the vehicle from the line connecting the upper and lower spot welding positions and above the lower spot welding position and contacts the door edge or body body side. The impact when the door is closed is reduced. At that time, the input from the impact mitigating member to the door (reaction force of the impact mitigating member) prevents the relative angle between the vehicle width direction inner side of the door and the bracket of the impact beam from being increased. Occurrence is reduced. For this reason, even if the opening and closing operation of the door is repeated, the joint state of the spot welded portion between the inside of the door in the vehicle width direction and the bracket is maintained well.

  According to the second aspect of the present invention, the impact mitigating member is disposed below the upper spot welding position with respect to the vehicle vertical direction. That is, the impact relaxation member is disposed between the upper and lower spot welding positions. For this reason, when the door is closed, the impact relaxation member reduces the occurrence of stress in both the upper and lower spot welding.

  According to the third aspect of the present invention, the weather strip is disposed on the front side of the vehicle across the spot welding position of the bracket, and the impact mitigating member is disposed on the rear side of the vehicle.

  Generally, the impact beam has inertia even at the moment when the door is closed, so it is displaced toward the vehicle interior side, and the inner edge of the door in the vehicle width direction is on the vehicle front side from the spot welding position. Therefore, the relative displacement between the vehicle width direction inside in front of the door and the impact beam bracket tends to increase. In the present invention, when the door is closed, the impact buffering member abuts the body body on the vehicle rear side opposite to the weather strip across the spot welding position of the bracket. ), The relative angle between the inside of the door in the vehicle width direction and the bracket of the impact beam is suppressed. For this reason, generation | occurrence | production of the stress by the spot welding of the vehicle width direction inside inside a door and a bracket is reduced.

  According to the fourth aspect of the present invention, the impact reducing member is attached to the edge of the door, and the impact reducing member abuts on the body body when the door is closed. For this reason, the relative angle between the inside of the door in the vehicle width direction and the bracket is suppressed by the input from the impact relaxation member to the door, and the occurrence of stress in spot welding is reduced.

  According to the fifth aspect of the present invention, the impact relaxation member is attached to the body body, and the impact relaxation member abuts against the edge of the door when the door is closed. For this reason, the relative angle between the inside of the door in the vehicle width direction and the bracket is suppressed by the input from the impact relaxation member to the door, and the occurrence of stress in spot welding is reduced.

  According to the sixth aspect of the present invention, a conventionally used cushion rubber for preventing interference between the door and the body body can be used as the impact reducing member. For this reason, it is not necessary to add new parts, and cost reduction is possible.

  As described above, the vehicle side part structure according to the first aspect of the present invention reduces stress generated in spot welding between the inside of the door in the vehicle width direction and the bracket when the door opening / closing operation is repeated. it can.

  The vehicle side part structure according to the second aspect of the present invention can reduce stress generated in both the upper and lower spot welding by the impact relaxation member disposed between the upper and lower spot welding positions.

  In the vehicle side portion structure according to the third aspect of the present invention, the impact mitigating member is disposed on the vehicle rear side with the spot welding position sandwiched with respect to the weather strip on the vehicle front side. It is possible to further suppress an increase in the relative displacement with.

  The vehicle side portion structure according to the fourth aspect of the present invention can be input to the door from the impact reducing member when the door is closed by the impact reducing member provided at the edge of the door.

  In the vehicle side part structure according to the fifth aspect of the present invention, when the door is closed, the vehicle side part structure can be more reliably input to the door when the door is closed.

  In the vehicle side part structure according to the present invention described in claim 6, it is not necessary to add new parts, and cost reduction can be realized.

[First Embodiment]
Hereinafter, a first embodiment of a vehicle side part structure according to the present invention will be described with reference to FIGS. In these drawings, an arrow FR appropriately shown indicates the vehicle front side, an arrow UP indicates the vehicle upper side, and an arrow OUT indicates the vehicle width direction outer side.

  1 and 2 show a state in which the impact beam is attached to the inside of the front side door using the bracket according to the present embodiment. As shown in FIG. 1, a front door opening 12 and a rear door opening 14 are formed on the side of the body body 11 of the vehicle 10. A front side door 16 is attached to the front door opening 12 so as to be opened and closed by a hinge 18, and a rear side door 20 is attached to the rear door opening 14 so as to be opened and closed by a hinge 22. In addition, two impact beams 26 and 28 are arranged inside the front side door 16 at the upper part and the lower part along the longitudinal direction of the vehicle body.

  As shown in FIG. 2, the front end 28 </ b> A and the rear end 28 </ b> B of the lower impact beam 28 are attached to a door inner panel 42 constituting the front side door 16 via brackets 30 and 32, respectively. In addition, the front end portion 26A and the rear end portion 26B of the upper impact beam 26 are attached to the door inner panel 42 via brackets 34 and 36, respectively.

  3 to 5 show a structure in the vicinity of the bracket 32 for fixing the rear end portion 28B of the impact beam 28 which is a main portion of the present embodiment. As shown in these drawings, a convex portion 32A that protrudes outward in the vehicle width direction is formed in the vicinity of the center portion of the bracket 32 in the vehicle vertical direction, and is substantially outside the convex portion 32A in the vehicle width direction. A semicircular recess 32B is formed. The impact beam 28 is made of a pipe material, and the rear end portion 28B of the impact beam 28 is joined to the concave portion 32B of the bracket 32 by arc welding 38.

  As shown in FIG. 5, the front side door 16 is integrated with the door outer panel 40 by a hemming process and is disposed on the vehicle interior side, and has a closed cross section. And a metal door inner panel 42 (only the lower part of the front side door 16 is shown in FIG. 5).

  As shown in FIGS. 3 and 4, a flat portion 42 </ b> A extending outward in the vehicle width direction is formed at the edge of the door inner panel 42. On the rear end side of the bracket 32 in the vehicle front-rear direction, a plurality of attachment portions 33 recessed in a concave shape are formed. These mounting portions 33 are formed in a substantially flat shape on the inner side in the vehicle width direction, and are arranged at two locations on the impact beam 28 and at two locations on the bottom. The mounting portion 33 of the bracket 32 is arranged in a surface contact state on the flat portion 42A of the door inner panel 42 and is fixed by spot welding 44A, 44B, 44C, 44D. In the present embodiment, two spot welds 44A and 44B are arranged on the upper part of the impact beam 28, and two spot welds 44C and 44D are arranged on the lower part of the impact beam 28 in a substantially straight line in the vehicle vertical direction. In addition, when describing the position of spot welding, the code | symbol of AD is attached after 44, and AD after 44 is abbreviate | omitted when it is not necessary to demonstrate a position.

  As shown in FIG. 6, the door inner panel 42 protrudes inward in the vehicle width direction through a step portion 42 </ b> B that is bent in a direction substantially perpendicular to the plane portion 42 </ b> A from the plane portion 42 </ b> A to the vehicle front side. A protruding portion 42C is provided. Further, a resin door trim 46 extending toward the vehicle interior side is provided on the inner side in the vehicle width direction of the protruding portion 42C.

  The body main body 11 is provided with side member outers 50 that face each other at a predetermined interval along the shapes of the flat end portion 42A, the stepped portion 42B, and the protruding end portion 42C of the door inner panel 42. A circular opening 43 is formed in the plane portion 42A of the door inner panel 42 on the vehicle rear side from the rear end portion 28B of the impact beam 28. A cushion as an impact reducing member is formed on the inner side in the vehicle width direction of the opening 43. A rubber 52 is attached. The cushion rubber 52 includes a head portion 52A that is close to and opposed to the flat surface portion 50A of the side member outer 50, and a claw portion 52B that is locked to the vehicle width direction outer side of the opening 43.

  As shown in FIG. 3, the cushion rubber 52 connects the upper spot weld 44 </ b> B disposed at the position closest to the impact beam 28 and the lower spot weld 44 </ b> C disposed at the position closest to the impact beam 28. It is behind the vehicle line L and is provided between the upper spot weld 44B and the lower spot weld 44C in the vehicle vertical direction.

  As shown in FIG. 6, a rubber weather strip 54 is attached to the corner portion between the flat portion 42 </ b> A and the stepped portion 42 </ b> B on the inner side in the vehicle width direction of the door inner panel 42. The weather strip 54 is attached along the edge of the front side door 16 and is configured to contact the corner 50B of the side member outer 50 when the front side door 16 is closed. The weather strip 54 is disposed on the vehicle front side from the position of the spot welds 44A, 44B, 44C, 44D of the bracket 32, and cushion rubber is provided on the vehicle rear side across the positions of the spot welds 44A, 44B, 44C, 44D. 52 is arranged.

  A rubber opening weather strip 56 is attached to an end portion 50C of the side member outer 50 on the vehicle front side. The opening weather strip 56 is configured to contact the door trim 46 when the front side door 16 is closed. The weather strip 54 and the opening weather strip 56 are not limited to rubber and may be made of resin.

  Next, the operation and effect of this embodiment will be described. Here, as a comparative example, as illustrated in FIG. 8, a description will be given in comparison with a configuration in which cushion rubber is not provided on the door inner panel 42 of the front side door 106. 7 and 8, the amount of deformation when the front side door 16 is closed is exaggerated for easy understanding of the operation and effects of the present embodiment.

  As shown in FIG. 6, the front side door 16 is configured to be openable and closable with respect to the side member outer 50 of the body main body 11. In a state in which the front side door 16 is closed, the cushion rubber 52 provided on the flat surface portion 42A of the door inner panel 42 is close to and opposed to the flat surface portion 50A of the side member outer 50, and is stepped from the flat surface portion 42A of the door inner panel 42. A weather strip 54 provided at a corner with 42B is in contact with a corner 50B of the side member outer 50. Further, an opening weather strip 56 provided at the end portion 50 </ b> C of the side member outer 50 is in contact with the door trim 46.

  In the door side portion structure of the comparative example, as shown by a two-dot chain line in FIG. 8, the impact beam 28 has inertia compared to the solid line in FIG. 8 at the moment when the front side door 106 is closed. Therefore, since the impact beam 28 is fixed to the bracket 32 by arc welding 38, the bracket 32 is also displaced toward the vehicle interior side. On the other hand, when the weather strip 54 and the side member outer 50 are in contact with each other, the door inner panel 42 is deformed to the outside of the passenger compartment by an input in the direction of arrow F1 from the weather strip 54 (reaction force of the weather strip 54). That is, the front side of the door inner panel 42 is deformed outward from the position of the spot weld 44, and the relative displacement between the door inner panel 42 and the bracket 32 is increased. Therefore, when the cushion rubber is not provided on the door inner panel 42, the change in the angle θ2 between the door inner panel 42 and the bracket 32 (impact beam 28) becomes large, and the door inner panel 42 and the bracket 32 are joined. Stress is generated in the spot weld 44. For this reason, stress is generated in the spot weld 44 when the opening and closing operation of the front side door 106 is repeated.

  On the other hand, in the vehicle side part structure of the present embodiment, as indicated by a two-dot chain line in FIG. 7, the cushion rubber provided on the flat part 42 </ b> A of the door inner panel 42 at the moment when the front side door 16 is closed. 52 contacts the flat surface portion 50 </ b> A of the side member outer 50. At this time, the cushion rubber 52 is on the rear side of the positions of the spot welds 44A, 44B, 44C, 44D, and contacts the flat portion 50A of the side member outer 50 between the upper spot weld 44B and the lower spot weld 44C. Therefore, the relative displacement between the door inner panel 42 and the bracket 32 is reduced by the input in the direction of the arrow F2 from the cushion rubber 52 (reaction force of the cushion rubber 52). That is, the change in the angle θ1 between the door inner panel 42 and the bracket 32 (impact beam 28) is reduced, and the occurrence of stress at the spot weld 44 that joins the door inner panel 42 and the bracket 32 is reduced. Thereby, when the opening / closing operation | movement of the front side door 16 is repeated, the stress which arises in the spot welding 44 can be reduced.

  FIG. 9 shows a graph of the relationship between the stress and the elapsed time in the spot welding 44 in the vehicle side part structure of this embodiment and the comparative example. As shown in this graph, it can be confirmed that the stress in the spot weld 44 of the present embodiment is smaller than the stress in the spot weld 44 of the comparative example.

  In the vehicle side part structure of the present embodiment, even when a large flat portion 42A of the door inner panel 42 cannot be secured particularly in a three-door automobile or the like, the bracket 32 is increased in size or reinforced by adding parts, and the thickness of the door inner panel 42 is increased. It is not necessary to take measures such as increasing the size, and the increase in mass and the number of parts can be suppressed. The cushion rubber 52 is a conventionally used cushion rubber for preventing interference between the front side door and the body body, and the cushion rubber 52 is attached to a predetermined position of the flat portion 42A of the door inner panel 42. Because of the configuration, it is not necessary to add new parts. For this reason, the stress which arises in the spot welding 44 of the bracket 32 and the door inner panel 42 can be reduced at low cost.

(Variation of the first embodiment)
In the first embodiment described above, the cushion rubber 52 is provided between the spot weld 44B below the impact beam 28 and the spot weld 44C above the impact beam 28 in the vehicle vertical direction. However, the cushion rubber 52 may be provided at another position in the vehicle vertical direction as long as it is above the lowermost spot weld 44D of the impact beam 28. For example, the uppermost spot weld 44 </ b> A of the impact beam 28 may be provided above the impact beam 28.

[Second Embodiment]
Next, a second embodiment of the vehicle side part structure according to the present invention will be described with reference to FIG. In addition, about the same component as 1st Embodiment mentioned above, the same number is attached | subjected and the description is abbreviate | omitted.

  As shown in FIG. 10, an opening 70 is formed in the flat surface portion 50 </ b> A of the side member outer 50 facing the flat surface portion 42 </ b> A of the front side door 16, and the head of the cushion rubber 72 is formed outside the opening 70 in the vehicle width direction. The part 52A is attached. The shape of the cushion rubber 72 is the same as that of the cushion rubber 52 shown in FIG.

  Even in such a configuration, when the front side door 16 is closed, the cushion rubber 72 of the side member outer 50 comes into contact with the flat surface portion 42A of the door inner panel 42, so that spot welding is performed to join the door inner panel 42 and the bracket 32 together. The generation of stress at 44 is reduced. For this reason, when the opening / closing operation | movement of the front side door 16 is repeated, the stress which arises in the spot welding 44 can be reduced.

[Supplementary explanation of the embodiment]
In the first and second embodiments described above, the cushion rubber 52 or the cushion rubber 72 is provided on the rear side of the bracket 32 for fixing the lower impact beam 28. However, the present invention is not limited to this configuration. For example, cushion rubber 52 or cushion rubber 72 may be provided at a predetermined position on the rear side of the bracket 36 for fixing the upper impact beam 26.

  The first embodiment has a configuration in which the cushion rubber 52 is provided on the door inner panel 42, and the second embodiment has a configuration in which the cushion rubber 72 is provided on the side member outer 50. However, the present invention is not limited to this. A cushion rubber may be provided on both side member outers 50.

  In the first embodiment and the second embodiment, the cushion rubbers 52 and 72 are provided as the impact relaxation members, but the invention is not limited to rubber members. For example, as long as it is a member that can alleviate the impact when the front side door 16 is closed, other materials such as resin or other shapes can be used.

1 is a schematic side view showing a vehicle body to which a vehicle side part structure according to a first embodiment is applied. It is a partially cutaway side view showing the front side door to which the vehicle side part structure according to the first embodiment is applied. It is a side view showing the whole vehicle side part structure concerning a 1st embodiment. It is a perspective view which shows the whole structure of the vehicle side part structure shown by FIG. FIG. 4 is a cross-sectional view showing the overall configuration of the vehicle side portion structure shown in FIG. 3 in a state cut along the vehicle vertical direction. FIG. 4 is a cross-sectional view showing the overall configuration of the vehicle side portion structure shown in FIG. 3 in a state cut along the vehicle width direction. It is a figure which shows the effect | action at the time of the closing of the front side door of the vehicle side part structure shown by FIG. It is a figure which shows the effect | action at the time of closing of the front side door of the vehicle side part structure which concerns on a comparative example. It is a graph which shows the relationship between the stress in spot welding in 1st Embodiment and a comparative example, and elapsed time. It is a side view which shows the whole structure of the vehicle side part structure which concerns on 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Vehicle 11 Body main body 16 Front side door 28 Impact beam 28B Rear end part 32 Bracket 40 Door outer panel (door)
42 Door inner panel (door)
42A flat surface (edge)
44A Spot welding 44B Spot welding 44C Spot welding 44D Spot welding 50 Side member outer (body body)
52 Cushion rubber (impact mitigating member)
54 Weather Strip 72 Cushion Rubber (Shock Mitigation Member)
L line (line connecting the upper and lower spot welding positions)

Claims (6)

A door that is openable and closable with respect to the body body, and has a door whose inner edge in the vehicle width direction faces the body body when closed
An impact beam disposed along the vehicle longitudinal direction inside the door;
A bracket that is spot-welded at least at the upper and lower portions of the impact beam inside the door in the vehicle width direction, and that fixes the rear end of the impact beam;
Attached to at least one of the edge portion of the body and the edge portion of the body main body that is behind the vehicle from the line connecting the upper and lower spot welding positions and above the lower spot welding position. An impact mitigating member that contacts the edge side or the body body side when the door is closed;
The vehicle side part structure characterized by having.   The vehicle side part structure according to claim 1, wherein the impact relaxation member is disposed below a spot welding position of the upper portion with respect to the vehicle vertical direction. A weather strip is provided inside the vehicle width direction of the door,
3. The vehicle side according to claim 1, wherein the weather strip is disposed on the vehicle front side across the spot welding position of the bracket, and the impact reducing member is disposed on the vehicle rear side. Part structure.   The said impact relaxation member is attached to the said edge part, The said impact relaxation member contact | abuts to the said body main body when the said door closes, The Claim 1 characterized by the above-mentioned. Vehicle side structure.   The said impact relaxation member is attached to the said body main body, and the said impact relaxation member contact | abuts to the said edge part when the said door closes, The Claim 1 characterized by the above-mentioned. Vehicle side structure.   The vehicle side part structure according to any one of claims 1 to 5, wherein the impact relaxation member is a cushion rubber.

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