JP2021130388A - Side sill reinforcement member, side sill, and side sill manufacturing method - Google Patents

Abstract

To provide a side sill reinforcement member, side sill, and side sill manufacturing method capable of effectively absorbing impact energy in the case of a side impact.SOLUTION: A side sill reinforcement member includes a reinforcement member body made of aluminum, and a joint member made of a steel and intended to join the reinforcement member body to a support member through spot welding. The reinforcement member body has plural closed section structures juxtaposed in a vehicle width direction. The closed section structures are joined closed-section structures to be joined to the support member via the joint member. The joined closed-section structure has an upper wall and lower wall. One of the upper wall and lower wall has a joined region, and the other one has an insertion hole formation region. The joined region is caulked and fixed when the steel joint member pierces the joined region. An insertion hole is formed in the insertion hole formation region. The insertion hole is disposed at a position where a spot welding electrode terminal is permitted to reach the joined region when inserted, and has a size allowing the spot welding electrode terminal to be inserted.SELECTED DRAWING: Figure 1

Description

The present invention is a member constituting the lower part of the vehicle body of a vehicle such as an automobile, and is used for a side sill to reinforce a side sill extending in the front-rear direction on both sides in the vehicle width direction. Regarding the manufacturing method of the side sill.

The vehicle body of a vehicle such as an automobile is generally a member constituting the lower portion thereof, and includes a member called a so-called side sill. The side sills are arranged on both sides of the vehicle body in the vehicle width direction and extend in the front-rear direction below the side door.

In addition to the rigidity and strength required for the vehicle frame, the side sill is required to have high impact absorption performance in the event of a side collision. That is, when there is a side collision with the vehicle body, so-called side collision, the impact energy is effectively absorbed by the deformation of the side sill to ensure the safety of the occupant and to be mounted inside the vehicle body. It is desired to protect the parts to be used (for example, battery pack).

For example, Patent Document 1 describes the following side sill and side sill reinforcing member. That is, the side sill described in Patent Document 1 includes an outer panel and an inner panel made of steel plates joined to each other, and an intermediate rib panel made of steel plate sandwiched between them and having a length extending substantially the entire length in the height direction of the side sill. , A reinforcing aluminum alloy hollow profile projecting from the intermediate rib panel toward the outer panel. The reinforcing aluminum alloy hollow profile constitutes a side sill reinforcing member that reinforces the side sill in the vehicle width direction.

Japanese Unexamined Patent Publication No. 2006-264476

An object of the present invention is to provide a reinforcing member for a side sill, a side sill, and a method for manufacturing a side sill capable of effectively absorbing impact energy at the time of a side collision.

This is because Patent Document 1 describes that the impact energy in the event of a side collision is absorbed by the reinforcing aluminum alloy hollow profile, that is, the side sill reinforcing member. This is because there is a limit and the challenge is to absorb the energy of side collisions more effectively.

As a means for solving the above problems, the present inventors have come up with a reinforcing member for a side sill having a plurality of closed cross-sectional structures arranged in the vehicle width direction. Specifically, the side sill reinforcing member is formed of aluminum and is configured to have a plurality of closed cross-sectional structures that are closed in the vehicle width direction and the vehicle vertical direction and surround a plurality of closed spaces arranged in the vehicle width direction. Will be done. According to the side sill reinforcing member, the plurality of closed cross-sectional structures are sequentially crushed by the load input in the vehicle width direction, so that the impact energy can be absorbed more efficiently than before.

However, in the steel plate intermediate rib panel described in Patent Document 1, the side sill reinforcing member having a plurality of closed cross-sectional structures arranged in the vehicle width direction is provided in the internal space formed by the side sill outer and the side sill inner. It is difficult to be supported by. This is because the intermediate rib panel has a length extending over substantially the entire length in the height direction of the side sill, and therefore interferes with the side sill reinforcing member extending in the vehicle width direction in the internal space.

Therefore, as a means for solving the above difficulty, it is conceivable to support the side sill reinforcing member in the internal space by a steel support member. In that case, the steel support member and the aluminum support member are used. Since the reinforcing member for the side sill is made of a dissimilar metal material, it is not easy to join by welding such as spot welding. On the other hand, in the current situation where an industrial robot for vehicle assembly having a spot welder is widely used in a vehicle manufacturing line such as an automobile, a side sill provided with a reinforcing member for the side sill may be manufactured by utilizing the existing manufacturing line. It is desirable from the viewpoint of reducing the manufacturing cost and the number of assembly steps.

Therefore, the present inventors have come up with the following method for manufacturing a side sill reinforcing member, a side sill, and a side sill that can be joined to a steel support member by spot welding.

The conceived side sill reinforcing member is provided in a vehicle side sill having a steel side sill outer and a steel side sill inner and extending in the front-rear direction of the vehicle, and is arranged in an internal space formed by the side sill outer and the side sill inner. The side sill reinforcing member is supported in the internal space by at least one steel supporting member joined to one of the side sill outer and the side sill inner. The side sill reinforcing member is a joint made of at least one steel for joining the aluminum reinforcing member main body extending in the front-rear direction of the vehicle and the reinforcing member main body to the at least one steel support member by spot welding. It is provided with a member. The reinforcing member main body has a plurality of closed cross-sectional structures that are closed in the vehicle width direction and the vehicle vertical direction and surround the plurality of closed spaces arranged in the vehicle width direction. The plurality of closed cross-section structures have a closed cross-section structure to be joined to be joined to the at least one steel support member via the at least one steel joining member. The closed cross-section structure to be joined has an upper wall portion that defines the upper side of the closed cross-section structure to be joined and a lower wall portion that defines the lower side of the closed cross-section structure to be joined. One of the upper wall portion and the lower wall portion has at least one joint portion to be joined to the at least one steel support member via the at least one steel joining member. The other of the upper wall portion and the lower wall portion has at least one insertion hole forming site. The at least one steel joining member is crimped and fastened to the at least one jointed portion by penetrating. At least one insertion hole is formed at the at least one insertion hole forming site. Then, the at least one insertion hole is arranged at a position that allows the spot welding electrode terminal for performing the spot welding to reach the at least one jointed portion by being inserted, and the spot welding is performed. The electrode terminal has a size that allows it to be inserted.

According to the side sill reinforcing member, in the side sill provided with the side sill reinforcing member, a plurality of closed cross-sectional structures surrounding each of the plurality of closed spaces arranged in the vehicle width direction receive the impact energy when a side collision occurs. By crushing in order, it can be absorbed efficiently.

Further, since the at least one steel joining member and the at least one steel supporting member are made of the same metal material, they can be joined to each other by spot welding. That is, the aluminum reinforcing member main body and the steel supporting member are spot-welded through the at least one steel joining member that is crimped and fastened by penetrating the aluminum reinforcing member main body. It can be joined integrally.

Further, the spot welding electrode terminal for contacting the at least one steel joint member during spot welding is inserted through the at least one insertion hole formed in the at least one insertion hole forming portion. Can reach the at least one welded portion and come into contact with the at least one steel welded member that penetrates and is caulked and fastened to the at least one welded portion.

Further, in the closed cross-sectional structure to be joined, even if the strength of one side is reduced due to the formation of an insertion hole in one of the upper wall portion and the lower wall portion, the upper wall portion and the lower wall portion. The joint surfaces of the at least one steel support member are joined via the at least one steel joint member that is crimped and fastened to the other of the portions, and the joint closed cross-sectional structure is the support. Reinforced by the member.

As a preferred embodiment of the side sill reinforcing member, the at least one jointed portion includes a plurality of joined portions arranged at intervals in the vehicle front-rear direction in the closed cross-sectional structure to be joined, and the at least one insertion hole. The forming portion may include a plurality of insertion hole forming portions arranged at intervals in the front-rear direction of the vehicle in the closed cross-section structure to be joined.

According to this aspect, the side sill reinforcing member can be supported by a plurality of steel support members at intervals in the vehicle front-rear direction. Therefore, in a side sill that is a part of a vehicle frame and requires a large strength, the side sill reinforcing member improves the strength of the side sill by being supported by a plurality of steel support members having strength and rigidity. be able to. Further, according to the side sill reinforcing member, the weight of the entire side sill can be reduced as compared with the case where the side sill reinforcing member is supported by one supporting member having the same length as the side sill reinforcing member and extending in the front-rear direction of the vehicle.

As a preferred embodiment of the side sill reinforcing member, the plurality of closed cross-section structures include three or more closed cross-section structures, and the plurality of jointed portions and the plurality of insertion hole forming portions are arranged in the vehicle width direction. Of the three or more closed cross-section structures, the closed cross-section structure is located between the outermost closed cross-section structure in the vehicle width direction and the innermost closed cross-section structure in the vehicle width direction. It may be provided on the upper wall portion and the lower wall portion of the joint closed cross-sectional structure.

According to this aspect, in the closed cross-section structure to be joined, in which the reinforcing member for the side sill is located between the closed cross-section structure located on the outermost side in the vehicle width direction and the closed cross-section structure located on the innermost side in the vehicle width direction. In the side sill which is a part of the vehicle frame and requires a large strength and absorbs the impact energy of the side collision by deformation because it has the plurality of jointed portions and the plurality of insertion hole forming portions. The side sill reinforcing member can be supported by the plurality of supporting members at a substantially intermediate position in the vehicle width direction. As a result, the side sill reinforcing member can suppress a change in posture as compared with the case where it is supported on the end side in the vehicle width direction, and can improve the strength of the side sill while absorbing impact energy at the time of a side collision. .. Further, also in the manufacturing process of the side sill, since the posture of the side sill reinforcing member is stable, it becomes easy to manufacture the side sill provided with the side sill reinforcing member.

As a preferred embodiment of the side sill reinforcing member, the at least one support member includes an upper support member arranged on the upper side of the reinforcing member main body, a lower support member arranged on the lower side of the reinforcing member main body, and the like. The plurality of joint portions include a plurality of upper joint portions to which the joint member to be joined to the upper support member is fastened, and a plurality of joint members to which the joint member to be joined to the lower support member is fastened. The plurality of insertion hole forming sites including the lower insertion hole forming portion includes the plurality of lower insertion hole forming portions arranged so as to face each of the plurality of upper joining portions, and the plurality of lower insertion hole forming portions. The upper wall portion of the closed cross-sectional structure to be joined includes the upper wall portion having the plurality of upper joint portions and the upper joint wall portion including the plurality of upper insertion hole forming portions arranged so as to face each other. The lower wall portion having a plurality of upper insertion hole forming portions constitutes the upper insertion wall portion, and the lower wall portion having the joint closed cross-sectional structure includes the lower joint wall portion having the plurality of lower joint portions and the plurality of lower joint wall portions. A lower insertion wall portion having a lower insertion hole forming portion may be formed.

According to this aspect, the side sill reinforcing member is joined to the upper support member and the lower support member, and can be supported from above and below in the internal space. As a result, in the side sill that is a part of the vehicle frame and requires a large strength, even if a load is input inward in the vehicle front-rear direction or the vehicle width direction, the side sill reinforcing member is on one side in the vehicle vertical direction. It is possible to suppress the change in posture as compared with the case of being supported by. Therefore, the side sill reinforcing member can improve the strength of the side sill as the strength against an inward load in the vehicle front-rear direction or the vehicle width direction.

Further, in the closed cross-sectional structure to be joined, in the upper wall portion, the insertion hole is formed at the plurality of upper insertion hole forming portions, and the upper support is provided via the joining member at the plurality of upper joint portions. Since the members are joined, even if the strength in the vehicle width direction is reduced by the insertion hole, the strength is improved by the upper support member, so that the strength of the upper wall portion as a whole is reduced in the vehicle width direction. Does not occur. Similarly, in the closed cross-sectional structure to be joined, the lower wall portion is formed with the insertion holes at the plurality of lower insertion hole forming portions and via the joining member at the plurality of lower insertion holes. Since the lower support member is joined, even if the strength in the vehicle width direction is reduced by the insertion hole, the strength is improved by the lower support member, so that the vehicle width as a whole of the lower wall portion is improved. There is no decrease in strength in the direction.

As a preferred embodiment of the side sill reinforcing member, the plurality of upper bonded portions and the plurality of lower bonded portions may be alternately arranged in the vehicle front-rear direction.

According to this aspect, the side sill reinforcing member can be alternately supported from above and below in the internal space. Therefore, in the side sill that is a part of the vehicle frame and requires a large strength, even if a load is input inward in the vehicle front-rear direction or the vehicle width direction, the side sill reinforcing member can be applied from one side in the vehicle vertical direction. The change in posture can be suppressed more than when it is supported. Therefore, the side sill reinforcing member can further improve the strength of the side sill as the strength against an inward load in the vehicle front-rear direction or the vehicle width direction.

As a preferred embodiment of the side sill reinforcing member, the reinforcing member main body has a flange portion extending from an end portion in the vehicle width direction toward a side opposite to the side having the bonded portion in the vehicle vertical direction. The flange portion has at least one flange portion to be joined to one of the side sill outer and the side sill inner via the at least one steel joining member, and the at least one flange portion to be joined. May be crimped and fastened by penetrating the at least one steel joining member.

According to this aspect, at the at least one flange portion to be joined, the steel side sill outer or the inner surface of the side sill inner can be joined by spot welding by the at least one steel joining member. That is, in the internal space formed by the side sill outer and the side sill inner, the side sill reinforcing member is supported by the support member on one side in the vehicle vertical direction and the other side by the side sill outer or the side sill inner. Can be done.

As a preferred embodiment of the side sill reinforcing member, the at least one steel joining member includes a plurality of steel joining members, and the jointed portion includes at least one of the plurality of steel joining members. It may be crimped and fastened by penetrating a plurality of steel joining members constituting a part thereof.

According to this aspect, at the jointed portion of the closed cross-sectional structure to be joined, the plurality of steel joining members are crimped and fastened by penetrating the joint members, so that the plurality of steel joining members are fastened. Since the steel support members are joined by spot welding, the stability of the side sill reinforcing member per jointed portion can be improved.

As a preferred embodiment of the side sill reinforcing member, the reinforcing member main body is a lateral wall extending in the vehicle width direction, and includes an upper lateral wall including the upper wall portion of the joined closed cross-sectional structure and a lateral wall extending in the vehicle width direction. A lower side wall located below the upper side wall and including the lower wall portion of the closed cross-section structure to be joined, an inner end of the upper side wall in the vehicle width direction, and the lower side wall in the vehicle width direction. The inner vertical wall connected to the inner end of the vehicle and extending in the vehicle vertical direction, the outer end of the upper horizontal wall in the vehicle width direction, and the outer end of the lower horizontal wall in the vehicle width direction are connected to the vehicle in the vertical direction. At least one intermediate of the outer vertical wall extending in the vertical direction of the vehicle connected to the upper horizontal wall and the lower horizontal wall at a position in the vehicle width direction between the inner vertical wall and the outer vertical wall. A vertical wall is provided, and the plurality of closed cross-sectional structures may be formed by the upper horizontal wall, the lower horizontal wall, the outer vertical wall, the intermediate vertical wall, and the inner vertical wall.

According to this aspect, the plurality of closed cross-sectional structures of the side sill reinforcing member are formed by the upper horizontal wall, the lower horizontal wall, the outer vertical wall, the intermediate vertical wall, and the inner vertical wall. Square closed cross-section structures are lined up in the vehicle width direction, and when a load is applied inward in the vehicle width direction, the closed cross-section structure located on the outside in the vehicle width direction is crushed in order from the closed cross-section structure on the inside. It will be easier. Further, in this case, the upper side wall and the lower side wall extending in the vehicle width direction can receive the load straight. Therefore, in the side sill that is a part of the vehicle frame and requires a large strength and absorbs the impact energy of the side collision by deformation, the side sill provided with the reinforcing member for the side sill has a large strength in the vehicle width direction. The impact energy of a side collision can be efficiently absorbed.

The conceived side sill is a vehicle side sill that extends in the vehicle front-rear direction, and is a steel side sill outer that is located outside in the vehicle width direction that is orthogonal to the vehicle front-rear direction, and a vehicle width direction that is greater than the side sill outer. A steel side sill inner that is located inside the side sill and forms an internal space between the side sill outer and the side sill outer by facing the vehicle width direction, a reinforcing member for the side sill, and the side sill in the internal space. It is provided with at least one steel support member that supports the reinforcing member and is joined to at least one of the side sill outer and the side sill inner.

According to the side sill, the aluminum reinforcing member body and the steel reinforcing member body are made of steel by the at least one steel joining member crimped and fastened to the welded portion of the aluminum reinforcing member body. The support member can be integrally joined by spot welding.

The conceived method for manufacturing the side sill is a method for manufacturing a side sill that extends in the vehicle front-rear direction and constitutes the outer lower portion of the vehicle body in the vehicle width direction orthogonal to the vehicle front-rear direction, and is outside the vehicle width direction. A steel side sill outer that is arranged in, a steel side sill inner that is arranged inside the side sill outer in the vehicle width direction, and a vehicle that is arranged between the side sill outer and the side sill inner. An aluminum reinforcing member body having a closed cross-sectional structure extending in the width direction and the vehicle front-rear direction and surrounding a plurality of closed spaces arranged in the vehicle width direction, and at least one steel body for supporting the reinforcing member body. A step of preparing the support member and at least one steel joining member for joining the reinforcing member main body to the at least one support member by spot welding, and any of the plurality of closed cross-sectional structures. In the closed cross-section structure to be joined, the spot welding is performed on an arbitrary insertion wall portion of the upper wall portion defining the upper side of the closed cross section structure to be joined and the lower wall portion defining the lower side of the closed cross section structure to be joined. In the step of forming at least one insertion hole through which the electrode terminal for spot welding is to be inserted, and in the closed cross-sectional structure to be joined, the vehicle is formed in the insertion wall portion of the upper wall portion and the lower wall portion. A step of penetrating and crimping the at least one steel joining member through a wall portion to be joined facing in the vertical direction, and a step of joining the at least one steel support member to one of the side sill outer and the side sill inner. And the step of inserting the spot welding electrode terminal into the insertion hole and joining the at least one steel support member and the at least one steel joining member by spot welding, and the step integrated by joining. The reinforcing member main body, the at least one steel joining member, the at least one steel support member and one of the side sill outer and the side sill inner, and the other of the side sill outer and the side sill inner are above and below the vehicle. Includes a step of joining at the edges of each other in the direction.

According to the method for manufacturing the side sill, a step of inserting the spot welding electrode terminal into the insertion hole and joining the at least one steel support member and the at least one steel joining member by spot welding. Since it is included, the spot welding electrode terminal is applied to the at least one steel joining member from the inside of the closed space surrounded by the closed cross-sectional structure to be joined, and the at least one steel joining member and the at least the above. One steel support member can be spot welded. As a result, the aluminum reinforcing member main body and the steel support member can be integrally joined by spot welding.

Further, in the manufacturing process, an intermediate in which one of the reinforcing member main body, the at least one steel joining member, the at least one steel supporting member, and the side sill outer and the side sill inner is integrated by joining is manufactured. can do. Then, after manufacturing the intermediate body, a step of joining the intermediate body to the other of the side sill outer and the side sill inner at the edges of each other in the vertical direction of the vehicle is performed, so that the side sill outer and the side sill inner are used. To eliminate manufacturing difficulty and improve manufacturing efficiency when the side sill reinforcing member and the supporting member to be arranged in the formed internal space are arranged after joining the side sill outer and the side sill inner. Can be done.

Regarding the method for manufacturing the side sill, the step of joining the at least one steel support member to one of the side sill outer and the side sill inner, and the step of inserting the spot welding electrode terminal into the insertion hole and the at least 1 The step of joining the one steel support member and the at least one steel joining member by spot welding may be performed first or at the same time.

Therefore, according to the method for manufacturing the side sill reinforcing member, the side sill, and the side sill according to the present invention, the side sill reinforcing member and the steel support member can be joined by spot welding.

It is a perspective sectional view which shows the side sill and the reinforcing member for a side sill which concerns on 1st Embodiment of this invention. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. FIG. 3 is a sectional view taken along line III-III of FIG. It is sectional drawing which shows the state that the reinforcing member for a side sill and the lower support member which concerns on 1st Embodiment of this invention are spot welded. It is sectional drawing which shows the intermediate manufactured in the middle process of the manufacturing method of the side sill which concerns on 1st Embodiment of this invention. It is a perspective sectional view which shows the side sill and the reinforcing member for a side sill which concerns on 2nd Embodiment of this invention. FIG. 6 is a cross-sectional view taken along the line VII-VII of FIG. FIG. 6 is a cross-sectional view taken along the line VIII-VIII of FIG. It is sectional drawing which shows the modification of the side sill and the reinforcing member for a side sill which concerns on 1st Embodiment of this invention.

Preferred embodiments of the present invention will be described with reference to the drawings. In this specification and drawings, the vehicle front-rear direction is defined as the X direction, the vehicle width direction is defined as the Y direction, and the vehicle vertical direction is defined as the Z direction. Then, when the vehicle front-rear direction X is used as a reference, the vehicle width direction Y is the left-right direction, and the vehicle vertical direction Z is the height direction. In FIG. 1 and the like, the arrow in the vehicle width direction Y points outward.

The side sill 1 and the side sill reinforcing member 40 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 4. FIG. 1 shows a cross section of the side sill 1 and the side sill reinforcing member 40, that is, a cross section when the side sill 1 and the side sill reinforcing member 40 are cut in the vehicle width direction Y and the vehicle vertical direction Z, and from the cross section, they are in the vehicle front-rear direction X. It is a perspective sectional view which shows the state which extends to. In FIG. 1, the side sill outer 10 and the side sill inner 20 are shown by a two-dot chain line, and the members existing inside them are shown by a solid line.

The side sill 1 is a member that is arranged so as to form a lower portion of a vehicle body (not shown) together with a floor cross member and the like, and functions as a part of a vehicle frame. The side sills 1 are arranged on the left and right outer sides of the vehicle width direction Y, which is the width direction of the vehicle body, and extend in the vehicle front-rear direction X at a height position below the side door (not shown). The floor cross member connects the side sill 1 on the right side of the vehicle body and the side sill 1 on the left side of the vehicle body. Of each side sill 1, the lower end of the A pillar is connected to the front portion of the vehicle front-rear direction X, and the lower end portion of the C-pillar is connected to the rear portion of the vehicle front-rear direction X. The lower end of the B pillar extending in the vertical direction Z of the vehicle is connected to the portion located in the middle.

The side sill 1 includes a side sill outer 10, a side sill inner 20, a support member 30, and a side sill reinforcing member 40.

Each of the side sill outer 10 and the side sill inner 20 is a steel plate member that extends in the vehicle front-rear direction X and has a uniform cross section in the vehicle front-rear direction X. In the side sill 1, the side sill outer 10 and the side sill inner 20 are arranged so as to face each other in the vehicle width direction Y. The side sill outer 10 is arranged so as to form the outermost surface in the vehicle width direction Y at the lower part of the vehicle body. The side sill inner 20 is arranged inside the side sill outer 10 in the vehicle width direction Y.

The side sill outer 10 includes an outer upper flange portion 11, an outer lower flange portion 12, and an outer protruding wall portion 13.

The outer upper flange portion 11 has a flat plate shape extending in the vehicle front-rear direction X, and is arranged so that its normal direction coincides with the vehicle width direction Y. The outer lower flange portion 12 is arranged below the outer upper flange portion 11. The outer lower flange portion 12 has a flat plate shape extending in the vehicle front-rear direction X, and is arranged so that its normal direction faces the vehicle width direction Y.

The outer protruding wall portion 13 has the outer upper flange portion 11 and the outer lower flange portion 12 so as to connect the lower end portion of the outer upper flange portion 11 and the upper end portion of the outer lower flange portion 12 to each other in the vehicle vertical direction Z. Intervene between and.

The outer protruding wall portion 13 has a shape that protrudes outward in the vehicle width direction Y from the outer upper flange portion 11 and the outer lower flange portion 12. The outer protruding wall portion 13 is arranged so that its back surface is open to the inside in the vehicle width direction Y. The outer protruding wall portion 13 has an outer vertical wall portion 13a, an outer upper wall portion 13b, and an outer lower wall portion 13c. The outer vertical wall portion 13a has a flat plate shape extending in the vertical direction Z of the vehicle in the cross section. That is, the outer vertical wall portion 13a is parallel to each of the vehicle front-rear direction X and the vehicle vertical direction Z. The outer upper wall portion 13b extends in the substantially vehicle width direction Y in the cross section so as to connect the upper end of the outer vertical wall portion 13a and the lower end of the outer upper flange portion 11 (in this embodiment, the vehicle width direction Y). It forms a flat plate (extending diagonally so that it is displaced downward toward the outside). The outer lower wall portion 13c has a flat plate shape extending in the substantially vehicle width direction Y in the cross section so as to connect the lower end of the outer vertical wall portion 13a and the upper end of the outer lower flange portion 12.

The side sill inner 20 includes an inner upper flange portion 21, an inner lower flange portion 22, and an inner protruding wall portion 23.

The inner upper flange portion 21 has a substantially flat plate shape extending in the vehicle front-rear direction X, and its normal direction coincides with the vehicle width direction Y and faces the outer upper flange portion 11 in the vehicle width direction Y. Is located in. The inner upper flange portion 21 accommodates the upper portion (unsigned) of the vertical wall portion 32a of the upper support member 32, which will be described later, and has a plurality of recesses for sandwiching the upper portion of the vertical wall portion 32a with the outer upper flange portion 11. Has (unsigned). The plurality of recesses in the inner upper flange portion 21 are formed in the vehicle front-rear direction X corresponding to the plurality of joint portions included in the upper wall portion 55a of the closed cross-section structure to be joined, which will be described later.

The inner lower flange portion 22 is arranged below the inner upper flange portion 21. The inner lower flange portion 22 has a flat plate shape extending in the vehicle front-rear direction X, and is arranged so that its normal direction faces the vehicle width direction Y and faces the outer lower flange portion 12 in the vehicle width direction Y. Has been done.

The inner protruding wall portion 23 has the inner upper flange portion 21 and the inner lower flange portion so as to connect the lower end portion of the inner upper flange portion 21 and the upper end portion of the inner lower flange portion 22 to each other in the vehicle vertical direction Z. It is interposed between the portion 22 and the portion 22. The inner protruding wall portion 23 has a shape that protrudes inward in the vehicle width direction Y from the inner upper flange portion 21 and the inner lower flange portion 22.

The inner protruding wall portion 23 has an inner vertical wall portion 23a, an inner upper wall portion 23b, and an inner lower wall portion 23c. The inner vertical wall portion 23a has a flat plate shape extending in the vertical direction Z of the vehicle in the cross section. That is, the inner vertical wall portion 23a is parallel to each of the vehicle front-rear direction and the vehicle vertical direction. The inner upper wall portion 23b has a flat plate shape extending in the vehicle width direction Y in the cross section so as to connect the upper end of the inner vertical wall portion 23a and the lower end of the inner upper flange portion 21. The inner lower wall portion 23c has a flat plate shape extending in the vehicle width direction Y in the cross section so as to connect the lower end of the inner vertical wall portion 23a and the upper end of the inner lower flange portion 22.

The side sill outer 10 and the side sill inner 20 thrust each other in the vehicle width direction so that the outer upper flange portion 11 and the outer lower flange portion 12 face the inner upper flange portion 21 and the inner lower flange portion 22 in the vehicle width direction, respectively. In the combined state, they are joined by a plurality of spot welding points S by spot welding. Due to such an arrangement of the side sill outer 10 and the side sill inner 20 facing each other, an internal space R is formed between the outer protruding wall portion 13 and the inner protruding wall portion 23.

The side sill reinforcing member 40 is a member for reinforcing the side sill 1, and is a side sill outer when a load is applied to the side sill outer 10 inward in the vehicle width direction Y due to a side collision with the vehicle body or the like. The vehicle width is contained in the internal space R so that the load is transmitted from the 10 to the side sill inner 20 and the side sill reinforcing member 40 itself receives the load, that is, the compressive load and crushes to absorb the energy due to the load. It is a member arranged so as to extend in the direction Y.

The side sill reinforcing member 40 includes a reinforcing member main body 42 and a joining member 44.

The reinforcing member main body 42 forms the main body of the side sill reinforcing member 40, and is a member integrally formed of an extruded aluminum member so as to have a plurality of closed spaces arranged in the vehicle width direction Y inside. .. In the present specification, "made of aluminum" means that it is made of a metal containing aluminum alloy as a main material.

The reinforcing member main body 42 has a plurality of closed cross-sectional structures 50 arranged in the vehicle width direction Y and closed in the vehicle width direction Y and the vehicle vertical direction Z. The plurality of closed cross-section structures 50 are four closed cross-section structures in this embodiment, and the first closed cross-section structure 51 and the second closed cross-section structure 51 are arranged in order from the outside to the inside in the vehicle width direction Y. The structure 52, the third closed cross-section structure 53, and the fourth closed cross-section structure 54. As a result, when a load is applied inward in the vehicle width direction Y, the reinforcing member main body 42 absorbs the energy due to the load by crushing the plurality of closed cross-sectional structures 50 under the load. Can be done.

Specifically, the reinforcing member main body 42 includes an upper horizontal wall 42a, a lower horizontal wall 42b, an inner vertical wall 42c, an outer vertical wall 42d, and a plurality of intermediate vertical walls 42e.

The upper side wall 42a is a side wall extending in the vehicle front-rear direction X and the vehicle width direction Y. The lower side wall 42b is a side wall extending in the vehicle front-rear direction X and the vehicle width direction Y, and is a side wall located below the upper side wall 112. The upper side wall 42a and the lower side wall 42b are arranged parallel to each other at intervals in the vehicle vertical direction X. Further, the upper side wall 42a and the lower side wall 42b have the same length in the vehicle width direction Y.

The inner vertical wall 42c is a vertical wall that is connected to the inner end of the upper horizontal wall 42a in the vehicle width direction Y and the inner end of the lower horizontal wall 42b in the vehicle width direction Y and extends in the vehicle front-rear direction X and the vehicle vertical direction Z. .. The outer vertical wall 42d is a vertical wall that is connected to the outer end of the upper horizontal wall 42a in the vehicle width direction Y and the outer end of the lower horizontal wall 42b in the vehicle width direction Y and extends in the vehicle front-rear direction X and the vehicle vertical direction Z. .. The inner vertical wall 42c and the outer vertical wall 42d are arranged parallel to each other at intervals in the vehicle width direction Y. Further, the inner vertical wall 42c and the outer vertical wall 42d have the same length in the vehicle vertical direction Z.

The plurality of intermediate vertical walls 42e are arranged between the inner vertical wall 42c and the outer vertical wall 42d in the vehicle width direction Y, are connected to the upper horizontal wall 42a and the lower horizontal wall 42b, and are connected to the upper horizontal wall 42a and the lower horizontal wall 42b. It is a vertical wall extending in the direction Z. In this embodiment, the plurality of intermediate vertical walls 42e includes three intermediate vertical walls. That is, the plurality of intermediate vertical walls 42e form a first intermediate vertical wall 42e1, a second intermediate vertical wall 42e2, and a third intermediate vertical wall 42e3, which are arranged in order from the outside to the inside in the vehicle width direction Y. include.

The reinforcing member main body 42 is composed of an upper horizontal wall 42a, a lower horizontal wall 42b, an inner vertical wall 42c, an outer vertical wall 42d, a first intermediate vertical wall 42e1, a second intermediate vertical wall 42e2, and a third intermediate vertical wall 42e3. It is constructed and formed of extruded aluminum profiles so that they are integrated.

The first closed cross-section structure 51 is configured by being surrounded by an upper horizontal wall 42a, a lower horizontal wall 42b, an outer vertical wall 42d, and a first intermediate vertical wall 42e1. The second closed cross-section structure 52 is configured by being surrounded by an upper horizontal wall 42a, a lower horizontal wall 42b, a first intermediate vertical wall 42e1 and a second intermediate vertical wall 42e2. The third closed cross-section structure 53 is configured by being surrounded by an upper horizontal wall 42a, a lower horizontal wall 42b, a second intermediate vertical wall 42e2, and a third intermediate vertical wall 42e3. The fourth closed cross-section structure 54 is configured by being surrounded by an upper horizontal wall 42a, a lower horizontal wall 42b, a third intermediate vertical wall 42e3, and an inner vertical wall 42c.

The plurality of closed cross-section structures 50 have a closed cross-section structure to be joined, which is joined to the support member 30 via the joining member 44. The closed cross-section structure to be joined is a closed cross-section structure selected from a plurality of closed cross-section structures 50. A detailed description of the closed cross-section structure to be joined will be described later.

Further, the reinforcing member main body 42 has an outer end portion and an inner end portion. The outer end portion is the outer end portion of the reinforcing member main body 42 in the vehicle width direction Y, and is composed of the outer vertical wall 42d. The outer end portion is close to or in contact with the outer vertical wall portion 13a of the side sill outer 10. The inner end portion is an inner end portion of the reinforcing member main body 42 in the vehicle width direction Y, and is composed of an inner vertical wall 42c. The inner end portion is close to or in contact with the inner vertical wall portion 23a of the side sill inner 20.

The joining member 44 is a steel member, and penetrates at least one of the upper side wall 42a and the lower side wall 42b of the reinforcing member main body 42 by penetrating at least one of the upper side wall 42a and the lower side wall 42b. It is a member that is crimped and fastened to one side. The joining member 44 is, for example, a columnar member. The relationship between the joining member 44 and the closed cross-sectional structure to be joined will be described later.

The support member 30 is a member that supports the side sill reinforcing member 40 in the internal space R. The support member 30 is a plate-shaped member made of a steel plate. In the first embodiment, the support member 30 is connected to the side sill outer 10. The support member 30 has an upper support member 32 and a lower support member 34.

The upper support member 32 is a member that is arranged above the side sill reinforcing member 40 in the vehicle vertical direction Z and supports the side sill reinforcing member 40 from above so as to suspend it. The upper support member 32 has a vertical wall portion 32a and a horizontal wall portion 32b. The vertical wall portion 32a is sandwiched between the outer upper flange portion 11 of the side sill outer 10 and the recess of the inner upper flange portion 21 of the side sill inner 20 and is sandwiched between the outer upper flange portion 11 and the inner upper flange portion 21 by the spot welding point S. It is a portion extending from the spot welding point S to the upper surface of the upper side wall 42a in the vehicle vertical direction Z. The horizontal wall portion 32b extends from the lower end edge of the vertical wall portion 32b along the upper horizontal wall 42a in the vehicle width direction Y, and is crimped and fastened to the joint member 44 by penetrating the upper horizontal wall 42a by a spot welding point S. This is the part to be joined. Specifically, the lateral wall portion 32b is a portion joined to the joining member 44 which is crimped and fastened by penetrating the jointed portion set in the upper wall portion 55a described later in the closed cross-sectional structure to be joined. .. That is, the lower surface of the side wall portion 32b constitutes a joining surface for joining to the joining member 44. The upper support member 32 enables the spot welding electrode terminal SW to come into contact with the side wall portion 32b.

The lower support member 34 is a member that is arranged below the vehicle vertical direction Z of the side sill reinforcing member 40 and supports the side sill reinforcing member 40 from below. The lower support member 34 has a bottom portion 34c, a vertical wall portion 34b, and a top portion 34a. The bottom portion 34c is a portion joined to the outer lower wall portion 13c of the side sill outer 10 by a spot welding point S. The bottom portion 34c is composed of two flat plate-shaped portions parallel to the outer lower wall portion 13c, and is arranged at intervals in the vehicle front-rear direction X as shown in FIG. The vertical wall portion 34b is a portion extending from the bottom portion 34c to the lower surface of the lower horizontal wall 42b in the vertical direction Z of the vehicle. The vertical wall portion 34b is composed of two flat plate-shaped portions parallel to the vehicle vertical direction Z and the vehicle width direction Y, and is arranged at intervals in the vehicle front-rear direction X. The two flat plate-shaped portions of the vertical wall portion 34b are connected to the two flat plate-shaped portions of the bottom portion 34c, respectively. The top portion 34a is composed of a flat plate-shaped portion parallel to the lower horizontal wall 42b, and is connected to the vertical wall portion 34b so as to straddle the two flat plate-shaped portions of the vertical wall portion 34b. The top portion 34a is a portion joined by a spot welding point S to a joining member 44 that is crimped and fastened by penetrating the lower side wall 42b. Specifically, the top portion 34a is a portion joined to the joining member 44 which is crimped and fastened by penetrating the jointed portion set in the lower wall portion 55b described later in the closed cross-sectional structure to be joined. That is, the upper surface of the top portion 34a constitutes a joining surface for joining to the joining member 44. The lower support member 34 has a space between the vertical wall portions 34b composed of two flat plate-shaped portions when viewed from the vehicle width direction Y, and opens downward without being blocked by the bottom portion 34c. It is formed in a shape. The lower support member 34 allows the spot welding electrode terminal SW to come into contact with the top 34a by inserting the spot welding electrode terminal SW into this space from below.

The closed cross-section structure to be joined is a closed cross-section structure that is joined to the support member 30 via the joining member 44. The closed cross-section structure to be joined is the second closed cross-section structure 52 in the first embodiment. The closed cross-sectional structure to be joined has an upper wall portion 55a and a lower wall portion 55b.

The upper wall portion 55a is a portion that defines the upper side of the closed cross-section structure to be joined, and is a portion of the upper side wall 42a that forms the closed cross-section structure to be joined. As shown in FIG. 1, the upper wall portion 55a extends in the vehicle front-rear direction X so as to form an upper side surface portion of the closed cross-sectional structure to be joined.

The lower wall portion 55b is a portion that defines the lower side of the closed cross-section structure to be joined, and is a portion of the lower side wall 42b that forms the closed cross-section structure to be joined. As shown in FIG. 1, the lower wall portion 55b extends in the vehicle front-rear direction X so as to form a lower side surface portion of the closed cross-sectional structure to be joined.

As shown in FIGS. 1 and 2, in the II-II cross section of the reinforcing member main body 42, an insertion hole 72 is formed in the upper wall portion 55a.

That is, at the II-II cross-sectional position of the reinforcing member main body 42, the upper wall portion 55a has an insertion hole forming portion (unsigned) which is a portion for forming the insertion hole 72. The insertion hole forming site is the peripheral edge of the insertion hole 72 at the upper wall portion 55a at the II-II cross-sectional position.

As shown in FIGS. 1 and 2, in the II-II cross section of the reinforcing member main body 42, the joint member 44 is crimped and fastened to the lower wall portion 55b by penetrating.

That is, at the II-II cross-sectional position of the reinforcing member main body 42, the lower wall portion 55b has a joined portion (unsigned) which is a portion for being crimped and fastened by penetrating the joining member 44. .. The portion to be joined is a peripheral portion of the joining member 44 in the lower wall portion 55b at the cross-sectional position of II-II, and is a portion that comes into contact with the joining surface of the supporting member 30 and is supported by the supporting member.

As shown in FIGS. 1 and 3, in the III-III cross section of the reinforcing member main body 42, the joint member 44 is crimped and fastened to the upper wall portion 55a by penetrating.

That is, at the III-III cross-sectional position of the reinforcing member main body 42, the upper wall portion 55a has a jointed portion (unsigned) which is a portion for being crimped and fastened by penetrating the joining member 44. .. The portion to be joined is a peripheral portion of the joining member 44 at the upper wall portion 55a at the cross-sectional position of III-III, and is a portion that comes into contact with the joining surface of the supporting member 30 and is supported by the supporting member.

As shown in FIGS. 1 and 3, in the III-III cross section of the reinforcing member main body 42, an insertion hole 72 is formed in the lower wall portion 55b.

That is, at the III-III cross-sectional position of the reinforcing member main body 42, the lower wall portion 55b has an insertion hole forming portion (unsigned) which is a portion for forming the insertion hole 72. The insertion hole forming site is the peripheral edge of the insertion hole 72 at the lower wall portion 55b at the III-III cross-sectional position.

The insertion hole forming portion is arranged at a position facing the vehicle vertical direction Z at the jointed portion in both the II-II cross-sectional position and the III-III cross-sectional position of the reinforcing member main body 42.

Then, the insertion holes 72 formed in the respective insertion hole forming portions are located at positions that allow the spot welding electrode terminals SW for performing spot welding to reach the respective jointed portions by being inserted. Have been placed.

Further, the insertion holes 72 formed in the respective insertion hole forming portions have a size through which the spot welding electrode terminal SW can be inserted.

Specifically, as shown in FIG. 4, in the II-II cross-sectional position, the insertion hole 72 formed in the insertion hole forming portion arranged in the upper wall portion 55a is spotted downward from the upper side in the vehicle vertical direction Z. The welding electrode terminal SW can be inserted. Further, the insertion hole 72 enables the inserted spot welding electrode terminal SW to come into contact with the joining member 44 fixed to the jointed portion arranged on the lower wall portion 55b downward.

At this time, another spot weld is also made from the lower side of the top 34a of the lower support member 34, which is in contact with the joint member 44 fastened to the joint portion arranged on the lower wall portion 55b from the lower side. The electrode terminal SW passes through the space between the vertical wall portions 34b of the lower support member 34 and abuts upward on the top portion 34a.

Similarly, although not shown, in the III-III cross-sectional position, the insertion hole 72 formed in the insertion hole forming portion arranged in the lower wall portion 55b is spot-welded upward from the lower side in the vehicle vertical direction Z. The electrode terminal SW can be inserted. Further, the insertion hole 72 enables the inserted spot welding electrode terminal SW to abut upward on the joining member 44 fixed to the jointed portion arranged on the upper wall portion 55a.

Then, another spot welding electrode terminal is also provided from the upper side of the side wall portion 32b of the upper support member 32 which is in contact with the joining member 44 fastened to the joint portion arranged on the upper wall portion 55a from above. The SW abuts downward on the side wall portion 32b.

In this way, through the insertion holes 72 formed at the insertion hole forming sites at the respective positions, the steel joining member 44 is sandwiched between the two spot welding electrode terminals SW located above and below the vehicle vertical direction Z. And the steel support member 30 are joined by spot welding.

The arrangement relationship between the insertion hole forming portion and the jointed portion as described above, that is, the arrangement relationship between the insertion hole 72 and the joining member 44 is not limited to the II-II cross-sectional position and the III-III cross-section position. As shown in FIG. 1, the upper wall portion 55a and the lower wall portion 55b of the closed cross-sectional structure to be joined extending in the vehicle front-rear direction X are the same over the vehicle front-rear direction X.

That is, the jointed portion includes a plurality of joined portions arranged at intervals in the vehicle front-rear direction X in the joined closed cross-sectional structure.

The plurality of parts to be joined include a plurality of upper parts to be joined to which the joining member 44 to be joined to the upper support member 32 is fastened, and a plurality of lower parts to be joined to which the joining member 44 to be joined to the lower support member 34 is fastened. Includes site and.

The insertion hole forming portion includes a plurality of insertion hole forming portions arranged at intervals in the vehicle front-rear direction X in the closed cross-sectional structure to be joined.

The plurality of insertion hole forming sites are a plurality of lower insertion hole forming sites arranged so as to face each of the plurality of upper joining sites, and a plurality of lower insertion hole forming sites arranged so as to face each of the plurality of lower joining sites. Includes the upper insertion hole forming site of.

Specifically, as shown in FIG. 1, the plurality of jointed portions are alternately arranged on the upper wall portion 55a and the lower wall portion 55b at intervals in the vehicle front-rear direction X. The plurality of jointed portions arranged on the upper wall portion 55a are a plurality of upper joined portions. The plurality of jointed portions arranged on the lower wall portion 55b are a plurality of lower joined portions.

Similarly, as shown in FIG. 1, a plurality of insertion hole forming portions are alternately arranged in the upper wall portion 55a and the lower wall portion 55b at intervals in the vehicle front-rear direction X. The plurality of insertion hole forming sites arranged on the upper wall portion 55a are a plurality of upper insertion hole forming sites. The plurality of insertion hole forming sites arranged in the lower wall portion 55b are a plurality of lower insertion hole forming sites.

In other words, the plurality of upper joined portions and the plurality of lower joined portions are alternately arranged in the vehicle front-rear direction.

Similarly, the plurality of upper insertion hole forming portions and the plurality of lower insertion hole forming portions are alternately arranged in the vehicle front-rear direction.

The upper wall portion 55a having a closed cross-sectional structure to be joined constitutes an upper joint wall portion having the plurality of upper joint portions and an upper insertion wall portion having the plurality of upper insertion hole forming portions.

Similarly, the lower wall portion 55b having the closed cross-section structure to be joined includes the lower joint wall portion having the plurality of lower joint portions and the lower insertion wall portion having the plurality of lower insertion hole forming portions. It is configured.

Then, the upper support member 32 and the lower support member 34 are alternately arranged on the joint members 44 fixed to the plurality of jointed portions alternately arranged on the upper wall portion 55a and the lower wall portion 55b, respectively. It is joined by spot welding.

As a result, the side sill reinforcing member 40 is alternately supported in the internal space R by the upper support member 32 and the lower support member 34 at intervals in the vehicle front-rear direction X.

Next, a method for manufacturing the side sill 1 according to the first embodiment will be described.

The method for manufacturing the side sill 1 includes a preparation step, an insertion hole forming step, a joining member caulking step, a joining member joining step, a support member joining step, and a side sill joining step.

The preparatory steps include a steel side sill outer 10, a steel side sill inner 20, an aluminum reinforcing member main body 42, a plurality of steel upper support members 32 and a plurality of lower support members 34, and a plurality of steels. This is a step of preparing the joint member 44 made of steel.

In the insertion hole forming step, in the joint closed cross-sectional structure of the reinforcing member main body 42, the upper insertion wall portion formed by a part of the upper wall portion 55a and the lower insertion wall portion formed by a part of the lower wall portion 55b are formed. , Is a step of forming an insertion hole 72 in each of the insertion hole forming portions provided.

In the joint member caulking step, in the joint closed cross-sectional structure of the reinforcing member main body 42, a part of the upper wall portion 55a is formed, and the upper joint wall portion and the lower wall portion 55b facing the lower insertion wall portion in the vertical direction Z of the vehicle. This is a step of penetrating each joining member 44 through the joining portions provided on the upper insertion wall portion and the lower joining wall portion facing the vehicle vertical direction Z, respectively. At this time, the joining member 44 may be directly driven into the jointed wall portion to be penetrated and crimped, or a hole suitable for the joining member 44 may be first drilled in the jointed wall portion in the hole. A step of penetrating the joint member 44 through the wall to be joined and crimping the joint member 44 may be performed by fitting the joint member 44. Further, at this time, a step of penetrating the joining member 44 through the insertion hole 72 from the inside of the closed cross-sectional structure to be joined to the wall portion to be joined and caulking may be performed, or the joining member 44 may be joined without passing through the insertion hole 72. From the outside of the closed cross-section structure, a step of penetrating through the jointed wall portion and crimping may be performed.

The joining member joining step is a step of inserting the spot welding electrode terminals SW into the plurality of insertion holes 72 and joining the plurality of steel support members 30 and the plurality of steel joining members 44 by spot welding.

Specifically, the joining member joining step includes the following steps. That is, as described above, as shown in FIG. 4, the insertion hole 72 formed in the insertion hole forming portion arranged in the upper wall portion 55a has an electrode for spot welding from the upper side to the lower side in the vehicle vertical direction Z. The terminal SW is inserted. Then, the spot welding electrode terminal SW through which the insertion hole 72 is inserted abuts downward with the joining member 44 fastened to the jointed portion arranged in the lower wall portion 55b. At this time, another spot weld is also made from the lower side of the top 34a of the lower support member 34, which is in contact with the joint member 44 fastened to the joint portion arranged on the lower wall portion 55b from the lower side. The electrode terminal SW passes through the space between the vertical wall portions 34b of the lower support member 34 and abuts upward on the top portion 34a. As a result, the steel joining member 44 and the steel lower support member 34 are sandwiched between the two spot welding electrode terminals SW in the vehicle vertical direction Z, and a step of joining by spot welding is performed.

Further, the joining member joining step includes the following steps. That is, even in the insertion hole 72 formed in the other insertion hole forming portion, the joining member 44 and the support member 30, for example III, which are fastened to the jointed portion facing the insertion hole forming portion through the insertion hole 72. The upper support member 32 at the −III cross-sectional position is sandwiched between the two spot welding electrode terminals SW in the vehicle vertical direction Z, and a step of joining by spot welding is performed.

The support member joining step is a step of joining a plurality of steel support members 30 to the steel side sill outer 10.

Specifically, in the support member joining step, the bottom portion 34c of the plurality of lower support members 34 is attached to the outer lower wall portion 13c of the side sill outer 10, and the top portion 34a of each lower support member 34 is attached to the lower cover. The process includes a step of positioning the joining member 44 so as to be in contact with the joining member 44 crimped and fastened to the joining portion, and joining by spot welding.

Similarly, in the support member joining step, the vertical wall portions 32a of the plurality of upper support members 32 are attached to the outer upper flange portion 11 of the side sill outer 10, and the lateral wall portions 32b of the respective upper support members 32 are the respective upper joined portions. It includes a step of positioning the joining member 44 so as to be in contact with the joining member 44 which is crimped and fastened, and joining by spot welding.

By performing the above preparation step, insertion hole forming step, joining member caulking step, joining member joining step, and supporting member joining step, as shown in FIG. 5, the aluminum reinforcing member main body 42 is made of a plurality of steels. The intermediate body 100 in which the joining member 44, the plurality of steel support members 30, and the steel side sill outer 10 are integrated by joining is manufactured.

In the side sill joining step, both side edges of the vehicle vertical direction Z, that is, the outer upper flange portion 11 and the outer lower flange portion 12 of the intermediate body 100 are combined with both side edge edges of the side sill inner 20 in the vehicle vertical direction Z, that is, the inner upper flange portion 21. This is a step of superimposing each on the inner lower flange portion 22 and the inner lower flange portion 22 in the vehicle width direction Y and joining them by spot welding.

Finally, the side sill 1 is manufactured by performing the side sill joining step.

In the method for manufacturing the side sill 1 according to the first embodiment, the support member joining step and the joining member joining step may be performed first or at the same time.

The operation and effect of the side sill 1, the reinforcing member 40 for the side sill, and the method of manufacturing the side sill 1 according to the first embodiment will be described.

According to the side sill 1 and the reinforcing member 40 for the side sill, and the method for manufacturing the side sill 1, since the plurality of steel joining members 44 and the plurality of steel support members 30 are made of the same metal material, spot welding is performed. Can be joined to each other. That is, the aluminum reinforcing member main body 42 and the plurality of steel supporting members 30 are formed through the plurality of steel joining members 44 that are crimped and fastened by penetrating the aluminum reinforcing member main body 42. Can be integrally joined by spot welding.

That is, according to the side sill 1, the side sill reinforcing member 40, and the method for manufacturing the side sill 1, the side sill reinforcing member 40 and the steel support member 30 can be joined by spot welding.

Further, the spot welding electrode terminals SW for contacting the plurality of steel joining members 44 at the time of spot welding insert a plurality of insertion holes 72 formed in the plurality of insertion hole forming portions, and a plurality of spot welding electrode terminals SW are inserted. It is possible to reach a plurality of jointed portions facing each of the insertion hole forming portions and abut on a plurality of steel joining members 44 which are crimped and fastened through the plurality of joined portions.

Further, in the side sill 1 provided with the side sill reinforcing member 40, when a side collision occurs, the impact energy is sequentially crushed by a plurality of closed cross-sectional structures 50 surrounding each of the plurality of closed spaces arranged in the vehicle width direction Y. , Can be absorbed efficiently.

Further, in any cross section of the closed cross-section structure to be joined, for example, II-II cross section or III-III cross section, the insertion hole 72 is formed in one of the upper wall portion 55a and the lower wall portion 55b, so that one side thereof. Even if the strength of the steel support member 30 is reduced, the joint surface of the steel support member 30 is joined via the steel joint member 44 that is crimped and fastened to the other of the upper wall portion 55a and the lower wall portion 55b. The closed cross-sectional structure to be joined is reinforced by the support member 30.

Further, the side sill reinforcing member 40 can be supported by a plurality of supporting members 30 at intervals in the vehicle front-rear direction X. Therefore, in the side sill 1 which is a part of the vehicle frame and requires a large strength, the side sill reinforcing member 40 is supported by a plurality of steel support members 30 having strength and rigidity, so that the side sill reinforcing member 40 has the strength of the side sill 1. Can be improved. Further, according to the side sill reinforcing member 40, the weight of the entire side sill 1 can be reduced as compared with the case where the side sill reinforcing member 40 is supported by one supporting member having the same length as the side sill reinforcing member 40 and extending in the vehicle front-rear direction X. can.

Further, the side sill reinforcing member 40 is located between the first closed cross-section structure 51 located on the outermost side in the vehicle width direction Y and the fourth closed cross-section structure 54 located on the innermost side in the vehicle width direction Y. Since the closed cross-section structure 52 of the above has a plurality of the jointed portions and the plurality of insertion hole forming portions, it is a part of the vehicle frame and requires a large strength and has a side collision. In the side sill 1 for absorbing the impact energy of the vehicle by deformation, the side sill reinforcing member 40 can be supported by a plurality of support members 30 at substantially intermediate positions in the vehicle width direction Y. As a result, the side sill reinforcing member 40 can suppress the posture change as compared with the case where the side sill reinforcing member 40 is supported on the end side in the vehicle width direction Y. Therefore, the side sill reinforcing member 40 can absorb impact energy at the time of a side collision and can improve the strength of the side sill 1. Further, even in the manufacturing process of the intermediate body 100 in the manufacturing process of the side sill 1, since the posture of the side sill reinforcing member 40 is stable, it becomes easy to manufacture the side sill 1 provided with the side sill reinforcing member 40.

Further, the side sill reinforcing member 40 is joined to the upper support member 32 and the lower support member 34, and can be supported from above and below in the internal space R. Therefore, in the side sill 1 which is a part of the vehicle frame and requires a large strength, even if a load toward the inside of the vehicle front-rear direction X or the vehicle width direction Y is input, the side sill reinforcing member 40 is in the vehicle vertical direction. The posture change can be suppressed as compared with the case where the Z is supported from one side. Therefore, the side sill reinforcing member 40 can improve the strength of the side sill 1 as the strength against an inward load in the vehicle front-rear direction X or the vehicle width direction Y.

Further, in the closed cross-sectional structure to be joined, the upper wall portion 55a has the insertion holes 72 formed at the plurality of upper insertion hole forming portions and the upper support member 32 via the joining member 44 at the plurality of upper joining portions. Even if the strength in the vehicle width direction is reduced by the insertion hole 72, the strength is improved by the upper support member 32, so that the overall strength is strong even if a load in the vehicle width direction is input. Does not decrease.

Similarly, in the closed cross-sectional structure to be joined, in the lower wall portion 55b, the insertion holes 72 are formed at the plurality of lower insertion hole forming portions, and the lower wall portion 55b is lowered via the joining member 44 at the plurality of lower insertion holes. Since the side support member 34 is joined, even if the strength in the vehicle width direction is reduced by the insertion hole 72, the strength is improved by the lower support member 34, so that the load in the vehicle width direction is input. However, the strength does not decrease as a whole.

Further, the side sill reinforcing member 40 can be alternately supported from above and below by the upper support member 32 and the lower support member 34 in the internal space R. Therefore, in the side sill 1 which is a part of the vehicle frame and requires a large strength, even if a load toward the inside of the vehicle front-rear direction X or the vehicle width direction Y is input, the side sill reinforcing member 40 is in the vehicle vertical direction. The posture change can be further suppressed as compared with the case where the Z is supported from one side. Therefore, the side sill reinforcing member 40 can further improve the strength of the side sill 1 as the strength against an inward load in the vehicle front-rear direction X or the vehicle width direction Y.

Further, since the plurality of closed cross-sectional structures 50 of the side sill reinforcing member 40 are formed by the upper horizontal wall 42a, the lower horizontal wall 42b, the outer vertical wall 42d, the intermediate vertical wall 42e, and the inner vertical wall 42c, the vehicle width direction Y Square closed cross-section structures are lined up in the same direction, and when a load is applied inward in the vehicle width direction Y, the closed cross-section structure located outside the vehicle width direction Y, that is, inside from the first closed cross-section structure 51. The closed cross-section structure, that is, the fourth closed cross-section structure 54 is likely to be crushed in order. Further, in this case, the upper side wall 42a and the lower side wall 42b extending in the vehicle width direction Y can receive the load straight. Therefore, in the side sill 1 which is a part of the vehicle frame and requires a large strength and absorbs the impact energy of the side collision by deformation, the side sill 1 provided with the side sill reinforcing member 40 has a large strength in the vehicle width direction Y. And can efficiently absorb the impact energy of side collision.

Further, according to the method for manufacturing the side sill 1, the spot welding electrode terminal SW is inserted into the plurality of insertion holes 72, and the plurality of steel support members 30 and the plurality of steel joining members 44 are joined by spot welding. Since the process is included, the spot welding electrode terminal SW is applied to the steel joining member 44 from the inside of the closed space surrounded by the closed cross-sectional structure to be joined, and the steel joining member 44 and the steel support member 30 are formed. Can be spot welded. As a result, the aluminum reinforcing member main body 42 and the steel support member 30 can be integrally joined by spot welding.

Further, in the manufacturing process of the side sill 1, as shown in FIG. 5, the aluminum reinforcing member main body 42, the plurality of steel joining members 44, the plurality of steel supporting members 30, and the steel side sill outer 10 are joined. The intermediate 100 integrated with the above can be manufactured. Then, after the intermediate body 100 is manufactured, the intermediate body 100 and the side sill inner 20 are joined at the edges of each other in the vehicle vertical direction Z, so that the internal space R formed by the side sill outer 10 and the side sill inner 20 is formed. When the side sill reinforcing member 40 and the support member 30 to be arranged inside are arranged after the side sill outer 10 and the side sill inner 20 are joined, it is possible to eliminate the manufacturing difficulty and improve the manufacturing efficiency.

The present invention is not limited to the one in which the support member 30 is joined to the side sill outer 10, but also includes the one in which the support member 30 is joined to the side sill inner 20.

Furthermore, the present invention is not limited to those in which the closed cross-section structure to be joined is a closed cross-section structure excluding the innermost closed cross-section structure and the outermost closed cross-section structure among the plurality of closed cross-section structures 50. For example, the present invention includes a closed cross-section structure to be joined having a fourth closed cross-section structure 54.

In order to explain this, the side sill 1A and the side sill reinforcing member 40A according to the second embodiment of the present invention will be described with reference to FIGS. 6 to 8. In FIG. 6, the side sill outer 10 and the side sill inner 20 are shown by a two-dot chain line, and the members existing inside them are shown by a solid line. In the following description, the same components as those according to the first embodiment will be designated by the same reference numerals, and the description will be omitted or simplified, and different components will be mainly described. ..

The side sill 1A includes a support member 30A, a side sill reinforcing member 40A, and an adhesive 80.

The side sill reinforcing member 40A has the same basic configuration as the side sill reinforcing member 40 according to the first embodiment, but is configured such that the closed cross-section structure to be joined is the fourth closed cross-section structure 54. In that respect, it has a structure different from that of the side sill reinforcing member 40.

That is, the side sill reinforcing member 40A includes a reinforcing member main body 42A and a joining member 44.

The reinforcing member main body 42A has a plurality of closed cross-sectional structures 50.

The plurality of closed cross-section structures 50 have a closed cross-section structure to be joined, which is joined to the support member 30A via the joining member 44.

The closed cross-section structure to be joined is the fourth closed cross-section structure 54 in the second embodiment.

The support member 30A has the same basic configuration as the support member 30 according to the first embodiment, but has a configuration different from that of the support member 30 in that it is joined to the side sill inner 20.

Specifically, the support member 30A includes an upper support member 32A and a lower support member 34A.

The upper support member 32A has a vertical wall portion 32Aa and a horizontal wall portion 32Ab. The vertical wall portion 32Aa is joined to the inner vertical wall portion 23a of the side sill inner 20 by a spot welding point S. The side wall portion 32Ab is a joining member that is crimped and fastened by penetrating a fourth closed cross-section structure 54 of the reinforcing member main body 42A, that is, a joint portion set in the upper wall portion 55a of the closed cross-section structure to be joined. It is joined to 44 by a spot welding point S by spot welding.

The lower support member 34A has a bottom portion 34Ac, a vertical wall portion 34Ab, and a top portion 34Aa. The bottom portion 34Ac is a portion joined to the inner lower wall portion 23c of the side sill inner 20 by a spot welding point S. The vertical wall portion 34Ab has the same configuration as the vertical wall portion 34b according to the first embodiment. The top portion 34Aa is spot-welded to a joint member 44 that is crimped and fastened by penetrating a joint portion set in a fourth closed cross-section structure 54, that is, a lower wall portion 55b of the closed cross-section structure to be joined. It is joined by the welding point S.

Therefore, the side sill reinforcing member 40A is in a state close to a cantilever beam that is supported near the inner end portion in the vehicle width direction Y when supported only by the support member 30A.

Therefore, the side sill reinforcing member 40A is located between the outer vertical wall 42d, which is the outer end of the reinforcing member main body 42A located on the opposite side of the inner end in the vehicle width direction Y, and the outer vertical wall portion 13a of the side sill outer 10. Is preferably adhered with the adhesive 80. As a result, the side sill reinforcing member 40A is stabilized by supporting both end portions in the vehicle width direction Y. The adhesive 80 may be applied over the entire surface in the vehicle front-rear direction X between the outer vertical wall 42d and the outer vertical wall portion 13a, but is necessary for stabilizing the posture of the side sill reinforcing member 40A. It suffices if it is applied, and for example, as shown in FIGS. 6 and 8, it may be applied at the same position as the position of the upper support member 32A in the vehicle front-rear direction X. However, the adhesive 80 is not an essential component when the side sill 1A according to the second embodiment is included in the present invention.

Next, a method for manufacturing the side sill 1A according to the second embodiment will be described.

The manufacturing method of the side sill 1A is basically the same as the manufacturing method of the side sill 1 according to the first embodiment, but has different points in the support member joining step and the joining member joining step. Further, it is different in that it further includes a bonding step described later.

The support member joining step according to the second embodiment is different in that the plurality of steel support members 30 are joined to the steel side sill inner 20 instead of the steel side sill outer 10.

Specifically, in the support member joining step according to the second embodiment, the bottom portion 34Ac of the plurality of lower support members 34A is attached to the inner lower wall portion 23c of the side sill inner 20 and the top portion of each lower support member 34A. This includes a step of positioning 34Aa so as to come into contact with the joining member 44 crimped and fastened to each lower joint portion, and joining by spot welding.

Similarly, in the support member joining step, the vertical wall portion 32Aa of the plurality of upper support members 32A is attached to the inner vertical wall portion 23a of the side sill inner 20 and the horizontal wall portion 32Ab of each upper support member 32A is attached to each upper joint portion. It includes a step of positioning the joining member 44 to be in contact with the crimped and fastened joining member 44 and joining by spot welding.

The joining member joining step according to the second embodiment is different in that the joining member joining step is performed not in the second closed cross-section structure 52 but in the joined closed cross-section structure which is the fourth closed cross-section structure 54.

That is, in the joining member joining step according to the second embodiment, it is formed at the insertion hole forming portions arranged in the upper wall portion 55a and the lower wall portion 55b of the closed cross-section structure to be joined, which is the fourth closed cross-section structure 54. The spot welding electrode terminal SW is inserted into the insertion hole 72 to be inserted. Then, the spot welding electrode terminal SW through which the insertion hole 72 is inserted is fastened to the jointed portion arranged on the upper wall portion 55a and the lower wall portion 55b of the joined closed cross-section structure which is the fourth closed cross-section structure 54. It comes into contact with the joining member 44 that has been formed.

Further, in the method of manufacturing the side sill 1A, a step of adhering the outer vertical wall 42d of the reinforcing member main body 42A and the outer vertical wall portion 13a of the side sill outer 10 with an adhesive 80 (hereinafter, referred to as “adhesion step”). include.

In the method for manufacturing the side sill 1A according to the second embodiment, the support member joining step and the joining member joining step may be performed first or at the same time. .. Further, in the method for producing the side sill 1A according to the second embodiment, the bonding step may be performed before the side sill joining step or at the same time as the side sill joining step.

The effects of the side sill 1A, the side sill reinforcing member 40A, and the method for manufacturing the side sill 1A according to the second embodiment are excluding those due to the second closed cross-section structure 52 having a closed cross-section structure to be joined. , The same is the same as the action and effect of the side sill 1 and the side sill reinforcing member 40 according to the first embodiment, and the method of manufacturing the side sill 1.

Further, according to the method for manufacturing the side sill 1A, the side sill reinforcing member 40A, and the side sill 1A according to the second embodiment, the following effects are obtained.

In the side sill 1A that is a part of the vehicle frame due to the adhesive 80 or the bonding process and requires a large strength and absorbs the impact energy of the side collision by deformation, the side sill reinforcing member 40A is in the vehicle width direction Y. The vicinity of the inner end portion can be supported by a plurality of support members 30, and the outer end portion in the vehicle width direction Y can be supported by the side sill outer 10 via the adhesive 80. As a result, the side sill reinforcing member 40 can suppress its posture change at the time of a side collision. Therefore, the side sill reinforcing member 40 can absorb impact energy at the time of a side collision and can improve the strength of the side sill 1A.

The present invention is not limited to the above two embodiments, and various modifications are allowed.

For example, the present invention is not limited to those that are crimped and fastened by one joining member penetrating one jointed portion, but are crimped by penetrating a plurality of joined members through one joined portion. Including those that have been fastened.

Further, the present invention is not limited to the one in which the support member supports the side sill reinforcing member from both the lower side and the upper side, and includes the one in which the support member supports the side sill reinforcing member from only one of the lower side and the upper side. ..

Further, in the present invention, the shape of the support member is not limited to the shape described above, and the shape of the support member is formed so as to link at least one of the side sill outer and the side sill inner with the side sill reinforcing member. Including those that are.

In order to explain this, the side sill 1B and the side sill reinforcing member 40B according to the modified example of the first embodiment of the present invention will be described with reference to FIG. FIG. 9 shows a cross section of the side sill 1B extending in the vehicle front-rear direction X at a position where the lower support member 34 is installed. The same components as above are designated by the same reference numerals, and the description thereof will be omitted or abbreviated.

The side sill 1B includes a support member 30B and a side sill reinforcing member 40B.

The side sill reinforcing member 40B has the same basic configuration as the side sill reinforcing member 40 according to the first embodiment, but has a different configuration from the side sill reinforcing member 40 in the following points.

The side sill reinforcing member 40B has a plurality of insertion hole forming portions arranged at intervals in the vehicle front-rear direction X in the upper wall portion 55a extending in the vehicle front-rear direction X in the closed cross-sectional structure to be joined.

The side sill reinforcing member 40B has a plurality of jointed portions arranged at intervals in the vehicle front-rear direction X on the lower wall portion 55b extending in the vehicle front-rear direction X in the closed cross-sectional structure to be joined.

That is, the upper wall portion 55a of the closed cross-section structure to be joined constitutes an insertion wall portion having a plurality of insertion hole forming portions arranged in the vehicle front-rear direction X, and the lower wall portion 55b comprises a plurality of coverings arranged in the vehicle front-rear direction X. It constitutes a wall portion to be joined having a joint portion.

Further, a plurality of steel joining members 44 constituting at least a part of the plurality of steel joining members 44 are crimped and fastened to the jointed portion by penetrating.

Specifically, in one of the plurality of jointed portions arranged in the vehicle front-rear direction X of the lower wall portion 55b, two joining members 44 are arranged side by side in the vehicle width direction Y, and each of them is arranged. It is crimped and fastened by penetrating the lower wall portion 55b. As a result, one bonded portion can be joined to the upper surface of the top portion 34Ba, which is the joining surface of the lower support member 34B, which will be described later, in a larger area or at a plurality of locations. The two joining members 44 may be arranged side by side in the front-rear direction X of the vehicle at the one jointed portion.

Further, the reinforcing member main body 42B included in the side sill reinforcing member 40B has a flange portion extending from the end portion in the vehicle width direction Y toward the side opposite to the side having the jointed portion in the vehicle vertical direction Z. Is preferable. Specifically, the reinforcing member main body 42B may further have a flange portion 42f extending continuously upward in the vehicle vertical direction Z from the outer vertical wall 42d forming the outer end portion in the vehicle width direction Y. preferable.

The flange portion 42f extends along the outer vertical wall portion 13a of the side sill outer 10, and is arranged so as to be close to or in contact with the outer vertical wall portion 13a. The flange portion 42f has a flange portion to be joined to the side sill outer 10 via a steel joining member 44. A joining member 44 is crimped and fastened to the flanged portion to be joined by penetrating the joining member 44.

Then, the steel joining member 44 crimped and fastened by penetrating the flange portion to be joined and the outer vertical wall portion 13a of the steel side sill outer 10 are joined by a spot welding point S by spot welding. Is preferable. The flange portion 42f and the joining member 44 crimped and fastened to the flange portion to be joined are not essential components when the side sill 1B is included in the present invention.

The support member 30B has only the lower support member 34B. The lower support member 34B has the same basic configuration as the lower support member 34 according to the first embodiment, but is different in shape from the lower support member 34.

The lower support member 34B has a bottom portion 34Bc, a vertical wall portion 34Bb, and a top portion 34Ba. The bottom portion 34Bc is a portion joined to the outer lower wall portion 13c of the side sill outer 10 by a spot welding point S, and is one flat plate-like portion parallel to the outer lower wall portion 13c. The vertical wall portion 34Bb is a portion extending from the edge of the bottom portion 34Bc in the vehicle front-rear direction X to the lower surface of the lower horizontal wall 42b in the vehicle vertical direction Z. The vertical wall portion 3B4b is one flat plate-shaped portion parallel to the vehicle vertical direction Z and the vehicle front-rear direction X. The top portion 34Ba is one flat plate-like portion parallel to the lower side wall 42b, and by penetrating the second closed cross-section structure 52, that is, the jointed portion set in the lower wall portion 55b of the closed cross-section structure to be joined. The two joining members 44 that are crimped and fastened are joined by a spot welding point S by spot welding. The top portion 34Ba is connected to the upper edge of the vertical wall portion 34Bb in the vehicle vertical direction Z.

With this configuration, the lower support member 34B is formed in a shape in which the outer lower wall portion 13c of the side sill reinforcing member 10 and the lower side wall 42b of the side sill reinforcing member 40B are linked to each other. As shown, it is formed in a substantially Z shape when viewed in the front-rear direction X of the vehicle.

The steel lower support member 34B is joined to the steel side sill outer 10 at the bottom 34Bc and the steel joining member 44 at the top 34Ba by spot welding. Then, the steel lower support member 34B supports the side sill reinforcing member 40B from the lower side in the internal space R of the side sill 1B.

The action and effect of the side sill 1B and the side sill reinforcing member 40B according to this modification are due to the support member having the upper support member and the lower support member, and also on the upper wall portion in the closed cross-sectional structure to be joined. It is the same as the action and effect of the side sill 1 and the side sill reinforcing member 40 according to the first embodiment, except that the portion to be joined is arranged.

Further, according to the side sill 1B and the side sill reinforcing member 40B according to the present modification, the following effects are obtained.

According to the side sill 1B, two steel joining members 44 are crimped and fastened by penetrating in one jointed portion of the closed cross-sectional structure to be joined, so that the two steel joining members are fastened. The top 34Ba of one steel support member 34B is joined to each of the 44 by spot welding, and one jointed portion is joined to one support member 34B in a larger area or at a plurality of places. Can be done. Therefore, it is possible to improve the stability of the side sill reinforcing member 40B per jointed portion.

According to the side sill 1B, the steel side sill outer 10 can be joined by spot welding to the inner surface of the steel side sill outer 10 by the steel joining member 44 at the flange portion to be joined portion 42f. That is, the side sill reinforcing member 40B is supported by the support member 30B on one side of the vehicle vertical direction Z and the other side by the side sill outer 10 in the internal space R formed by the side sill outer 10 and the side sill inner 20. be able to.

Further, although not shown, the present invention includes the following modifications.

The present invention is not limited to the side sill having a plurality of support members and a plurality of joint members, and may be a side sill having only one support member and one joint member.

That is, in the present invention, one support member may be joined to one joining member to support the side sill reinforcing member in the internal space of the side sill.

That is, in the present invention, the closed cross-sectional structure to be joined may have one jointed portion and one insertion hole forming portion facing the joined portion.

Further, the present invention is not limited to the one in which only one of the plurality of closed cross-section structures of the reinforcing member main body is the closed cross-section structure to be joined, and the plurality of closed cross-section structures are the closed cross-section structures to be joined. It may be the one. For example, of the four closed cross-section structures, two closed cross-section structures are used as the closed cross-section structures to be joined, and in each closed cross-section structure to be joined, an insertion hole is formed and the joint member is crimped and fastened by the support member. It may be supported.

Further, in the present invention, the shape of the joining member may be any shape as long as it is crimped and fastened by penetrating the insertion wall portion having the jointed portion, and is not limited to the one formed in a columnar shape.

Further, in the present invention, the insertion hole is arranged at a position that allows the spot welding electrode terminal for performing spot welding to reach the at least one jointed portion by being inserted, and the spot is also provided. The welding electrode terminal may have a size that allows it to be inserted, and the shape of the insertion hole is not limited to the round hole shape, and the arrangement of the insertion hole is not limited to the one directly above the joining member.

Further, the present invention is not limited to the one in which one insertion hole is formed in one insertion hole forming site, and may be one in which a plurality of insertion holes are formed in one insertion hole forming site. .. For example, in the modified example shown in FIG. 9, one insertion hole 72 formed in the upper wall portion 55a is formed so as to cover two joining members 44 facing each other in the vertical direction Z of the vehicle. Two insertion holes 72 may be formed in each of the members 44 so as to face each other in the vehicle vertical direction Z.

Further, the present invention is not limited to supporting the side sill reinforcing member so that the support member is sandwiched from above and below, and the support member is not limited to supporting the side sill reinforcing member from below. May support the side sill reinforcing member so that it is suspended only from above. In this case, the form of the upper support member is not limited to the form of the upper support member 32 and the upper support member 32A according to the first embodiment and the second embodiment, and is shown by, for example, a modification of FIG. It may be in the form of a support member 30B.

Further, the present invention is not limited to a reinforcing member main body having a plurality of rectangular closed cross-section structures arranged side by side in the vehicle width direction Y when viewed in the vehicle front-rear direction X, and a plurality of polygonal closed cross-section structures are substantially carved. It may be held side by side in the width direction Y. In this case, the upper wall portion in the closed cross-section structure to be joined is a portion located above the closed space in which the closed cross section structure to be joined is closed, and the lower wall portion in the closed cross section structure to be joined is the lower side of the closed space. It is the part located in.

The present invention is not limited to the reinforcing member main body formed of the extruded profile, and may be formed by another molding method.

1, 1A, 1B Side sill 10 Side sill Outer 11 Outer upper flange part 12 Outer lower flange part 13 Outer protruding wall part 13a Outer vertical wall part 13b Outer upper wall part 13c Outer lower wall part 20 Side sill inner 21 Inner upper flange part 22 Inner lower Flange part 23 Inner protruding wall part 23a Inner vertical wall part 23b Inner upper wall part 23c Inner lower wall part 30, 30A, 30B Support member 32 Upper support member 32a Vertical wall part 32b Horizontal wall part 34, 34A, 34B Lower support member 34a , 34Ba Top 34b, 34Bb Vertical wall 34c, 34Bc Bottom 40, 40A, 40B Side sill reinforcement 42, 42A, 42B Reinforcement body 42a Upper horizontal wall 42b Lower horizontal wall 42c Inner vertical wall 42d Outer vertical wall 42e1 First intermediate vertical wall 42e2 Second intermediate vertical wall 42e3 Third intermediate vertical wall 42f Flange 44 Joint member 50 Closed cross-section structure 51 First closed cross-section structure 52 Second closed cross-section structure 53 Third closed cross section Structure 54 Fourth closed-section structure 55a Upper wall part of closed-section structure to be joined 55b Lower wall part of closed-section structure to be joined 72 Insertion hole 80 Adhesive 100 Intermediate space SW Spot welding electrode terminal S Spot welding point

Claims (10)

In a vehicle side sill having a steel side sill outer and a steel side sill inner extending in the front-rear direction of the vehicle, the side sill outer and the side sill inner are arranged in an internal space formed by the side sill outer and the side sill inner. A side sill reinforcing member supported in the internal space by at least one steel supporting member joined to one side.
The aluminum reinforcing member body extending in the front-rear direction of the vehicle and
A steel joining member for joining the reinforcing member main body to the at least one steel support member by spot welding.
The reinforcing member main body has a plurality of closed cross-sectional structures that are closed in the vehicle width direction and the vehicle vertical direction and surround the plurality of closed spaces arranged in the vehicle width direction.
The plurality of closed cross-section structures have a closed cross-section structure to be joined, which is joined to the at least one steel support member via the at least one steel joining member.
The closed cross-section structure to be joined has an upper wall portion that defines the upper side of the closed cross-section structure to be joined and a lower wall portion that defines the lower side of the closed cross-section structure to be joined.
One of the upper wall portion and the lower wall portion has at least one joint portion to be joined to the at least one steel support member via the at least one steel joint member.
The other of the upper wall portion and the lower wall portion has at least one insertion hole forming site.
The at least one steel joint member is crimped and fastened to the at least one jointed portion by penetrating the joint member.
At least one insertion hole is formed at the at least one insertion hole forming site.
The at least one insertion hole is arranged at a position that allows the spot welding electrode terminal for performing the spot welding to reach the at least one bonded portion by being inserted, and the spot welding electrode is provided. The terminal has a size that can be inserted,
Reinforcing member for side sill. The at least one jointed portion includes a plurality of joined portions arranged at intervals in the front-rear direction of the vehicle in the closed cross-sectional structure to be joined.
The at least one insertion hole forming portion includes a plurality of insertion hole forming portions arranged at intervals in the vehicle front-rear direction in the joined closed cross-sectional structure.
The reinforcing member for a side sill according to claim 1. The plurality of closed cross-section structures include three or more closed cross-section structures.
The plurality of jointed portions and the plurality of insertion hole forming portions are the closed cross-section structure located on the outermost side in the vehicle width direction and the vehicle among the three or more closed cross-section structures arranged in the vehicle width direction. It is provided on the upper wall portion and the lower wall portion of the joined closed cross-section structure which is a closed cross-section structure located between the closed cross-section structures located on the innermost side in the width direction.
The reinforcing member for a side sill according to claim 2. The at least one support member includes an upper support member arranged on the upper side of the reinforcing member main body and a lower support member arranged on the lower side of the reinforcing member main body.
The plurality of parts to be joined include a plurality of upper parts to be joined to which the joining member to be joined to the upper support member is fastened, and a plurality of lower parts to which the joining member to be joined to the lower support member is fastened. Including the joint site,
The plurality of insertion hole forming sites are a plurality of lower insertion hole forming sites arranged so as to face each of the plurality of upper joining sites, and a plurality of lower insertion hole forming sites arranged so as to face each of the plurality of lower joining sites. Including the upper insertion hole forming site of
The upper wall portion of the closed cross-sectional structure to be joined constitutes an upper joint wall portion having the plurality of upper joint portions and an upper insertion wall portion having the plurality of upper insertion hole forming portions, and the joint is to be joined. The lower wall portion having a closed cross-sectional structure constitutes a lower joint wall portion having the plurality of lower joint portions and a lower insertion wall portion having the plurality of lower insertion hole forming portions.
The reinforcing member for a side sill according to claim 2 or 3. The plurality of upper bonded portions and the plurality of lower bonded portions are alternately arranged in the vehicle front-rear direction.
The reinforcing member for a side sill according to claim 4. The reinforcing member main body has a flange portion extending from an end portion in the vehicle width direction toward a side opposite to the side having the jointed portion in the vehicle vertical direction.
The flange portion has at least one flange portion to be joined to be joined to one of the side sill outer and the side sill inner via the at least one steel joining member.
The at least one steel joint member is crimped and fastened to the jointed portion of the at least one flange portion by penetrating the joint member.
The reinforcing member for a side sill according to claim 2 or 3. The at least one steel joining member includes a plurality of steel joining members.
A plurality of steel joining members constituting at least a part of the plurality of steel joining members are crimped and fastened to the jointed portion by penetrating.
The reinforcing member for a side sill according to any one of claims 1 to 6. The reinforcing member main body is a lateral wall extending in the vehicle width direction and is located below the upper lateral wall which is a lateral wall extending in the vehicle width direction and includes the upper wall portion of the closed cross-section structure to be joined. The lower side wall including the lower wall portion of the closed cross-section structure to be joined, the inner end of the upper side wall in the vehicle width direction, and the inner end of the lower side wall in the vehicle width direction are connected to the upper and lower sides of the vehicle. An inner vertical wall extending in the direction, an outer vertical wall connected to the outer end of the upper horizontal wall in the vehicle width direction and the outer end of the lower horizontal wall in the vehicle width direction and extending in the vehicle vertical direction, and the inner vertical wall. At a position in the vehicle width direction between the wall and the outer vertical wall, at least one intermediate vertical wall connected to the upper horizontal wall and the lower horizontal wall and extending in the vertical direction of the vehicle is provided.
The plurality of closed cross-sectional structures are formed by the upper horizontal wall, the lower horizontal wall, the outer vertical wall, the intermediate vertical wall, and the inner vertical wall.
The reinforcing member for a side sill according to any one of claims 1 to 7. A side sill for vehicles that extends in the front-rear direction of the vehicle.
A steel side sill outer that is located on the outside in the vehicle width direction that is orthogonal to the vehicle front-rear direction.
A steel side sill inner that is located inside the side sill outer in the vehicle width direction and forms an internal space between the side sill outer and the side sill outer by facing the side sill outer in the vehicle width direction.
The side sill reinforcing member according to any one of claims 1 to 8.
A steel support member that supports the side sill reinforcing member in the internal space and is joined to at least one of the side sill outer and the side sill inner.
Side sill. It is a method for manufacturing a side sill that extends in the vehicle front-rear direction and constitutes the outer lower portion of the vehicle body in the vehicle width direction orthogonal to the vehicle front-rear direction.
Between the steel side sill outer that is arranged outside in the vehicle width direction, the steel side sill inner that is arranged inside the side sill outer in the vehicle width direction, and the side sill outer and the side sill inner. To support the reinforcing member main body made of aluminum, which is arranged in the vehicle width direction and extends in the vehicle front-rear direction and has a closed cross-sectional structure surrounding a plurality of closed spaces arranged in the vehicle width direction, respectively. A step of preparing at least one steel support member and at least one steel joint member for joining the reinforcing member main body to the at least one support member by spot welding.
In any of the plurality of closed cross-section structures, the upper wall portion that defines the upper side of the closed cross-section structure to be joined and the lower wall portion that defines the lower side of the closed cross-section structure to be joined are arbitrary. A step of forming at least one insertion hole through which an electrode terminal for spot welding for performing spot welding can be inserted in the insertion wall portion of the above.
In the closed cross-section structure to be joined, at least one steel joining member is passed through the wall portion to be joined facing the insertion wall portion in the vertical direction of the vehicle among the upper wall portion and the lower wall portion. Process and
A step of inserting the electrode terminal for spot welding into the insertion hole and joining the at least one steel support member and the at least one steel joining member by spot welding.
A step of joining the at least one steel support member to one of the side sill outer and the side sill inner.
One of the reinforcing member main body integrated by joining, the at least one steel joining member, the at least one steel support member and the side sill outer and the side sill inner, and the other of the side sill outer and the side sill inner. And the process of joining the two at the edges of the vehicle in the vertical direction.
A method of manufacturing a side sill, including.

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