JP5572461B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat provided with an input member that receives a load from another member on the vehicle seat.

  Conventionally, a pipe frame (reinforcing frame) formed in a rectangular ring shape, a plate-like side frame adjacent to the outer side in the left-right direction of the pipe frame, and a bracket (input member) fixed to the outer side in the left-right direction of the side frame Is known (see Patent Document 1). In this technology, the front and rear and upper and lower surfaces of the bracket formed in a box shape are all flat. It is transmitted to the side frame and the like.

JP 2000-103275 A

  However, in the prior art, since the surface for transmitting the side impact load of the bracket is a flat surface, when the side impact load is applied, if the thickness of the bracket is thin, the plane will buckle and the load will be good. The load could not be transmitted to the side frame or the like.

  Then, even if it is a case where the thickness of a bracket (input member) is thin, this invention aims at providing the vehicle seat which can receive a load favorably with the said bracket.

The present invention that solves the above-described problem includes a base frame that constitutes the left and right portions of the seat back frame, and an input member that is provided adjacent to one base frame in the left-right direction and receives a load from another member. The input member has a closed cross-sectional shape, and a portion away from the upper and lower ends of at least one of the front wall and the rear wall has an uneven shape, and the uneven shape includes the front wall and the rear wall The input member is fixed to the base frame at the upper side or the lower side of the concave portion .

  According to the present invention, since the portion of the front wall and the rear wall of the input member that is separated from the upper and lower ends has an uneven shape, the rigidity of the one wall is increased, and thus the thickness of the input member is thin. Even if it is a case, buckling of one wall is suppressed and a load can be favorably received by an input member. In addition, since the upper and lower ends of the front wall and the rear wall are not provided with uneven shapes, the corners at the upper and lower ends of the front wall and the rear wall can be formed continuously in the left and right direction, It is also possible to satisfactorily transmit the load from one side to the other side.

In the present invention, the base frame includes left and right side frames constituting left and right portions of the seat back frame, and a reinforcement frame that is adjacent to one side frame in the left-right direction and reinforces the side frame. It is preferable that the input member has the concave portion fixed to the reinforcing frame .

In the present invention, it is desirable that the recess is formed in both the front wall and the rear wall. The input member preferably has an upper end and a lower end fixed to the base frame .

In the present invention, it is desirable that the recess is formed in both the front wall and the rear wall, and the bottom wall of the recess in the front wall and the bottom wall of the recess in the rear wall are joined .

In the present invention, the base frame includes left and right side frames constituting left and right portions of the seat back frame, and a reinforcement frame that is adjacent to one side frame in the left-right direction and reinforces the side frame. And the rear portion of the side frame is bent inward in the left-right direction, and the side frame is fixed to the reinforcing frame so as to form a closed cross-sectional shape portion with the rear portion and the reinforcing frame. The input member is preferably fixed at a position corresponding to the closed cross-sectional shape portion of the side frame .

  According to the structure of Claim 1, even if it is a case where the thickness of an input member is thin, a load can be favorably received by an input member.

It is a perspective view showing a vehicular seat concerning one embodiment of the present invention. It is the expansion perspective view which looked at the structure around a bracket from the front side. They are II sectional drawing (a) of FIG. 2, II-II sectional drawing (b), and III-III sectional drawing (c). It is the expansion perspective view which looked at the structure around a bracket from the back side.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
The vehicle seat according to the present invention is configured by covering a seat cushion made of urethane foam or the like on the outside of a seat frame 1 as shown in FIG. The seat frame 1 includes a seat back frame 2 and a seating portion frame 3. In the present invention, front and rear, left and right, and top and bottom are based on a passenger sitting on the seat.

  The seat back frame 2 includes a pair of side frames 4 as an example of a base frame, a pipe frame 5 as an example of a base frame (inner frame), a lower frame 6, and a bracket 7 as an example of an input member. Configured.

  The side frame 4 is a plate-like member that constitutes the left and right lower portions of the seat back frame 2, and is formed so as to protrude forward (at least one in the front-rear direction) from the pipe frame 5, as shown in FIG. Has been. As a result, a forward projecting shape of the seat back side portion is formed, and components such as an airbag (not shown) can be satisfactorily fixed to the plate-like side frame 4 extending in the front-rear direction. ing.

  Specifically, as shown in FIG. 3A, the side frame 4 is formed with a hole 41 penetrating left and right at an appropriate position, and the front portion 42 bends inward in the left-right direction and then bends backward. It is bent into a U shape in a sectional view. Thereby, the rigidity of the front part 42 of the side frame 4 is improved.

  The rear portion 43 of the side frame 4 is bent in an approximately L shape toward the inner side in the left-right direction, and is joined to the pipe frame 5 by welding. In FIG. 3A, the points welded by the welding torch T are indicated by large black dots.

  As shown in FIG. 1, the pipe frame 5 is a reinforcing frame that reinforces the side frame 4, and is formed in a cylindrical shape (closed cross-sectional shape) and is bent into a substantially rectangular ring shape. And the left-right lower part of the pipe frame 5 is joined adjacent to the inner side of each side frame 4 in the left-right direction. Thereby, the lower part 51 (including a part extending obliquely downward from the side frame 4) of the pipe frame 5 functions together with the lower frame 6 as a load transmission part that transmits a load in the left-right direction.

  Further, two wires W bent up and down a plurality of times are joined to the left and right side portions 52 and 53 of the pipe frame 5 so as to be spaced apart vertically. A pressure receiving member C made of resin is fixed. As a result, when the vehicle receives a rear impact load, the occupant sinks backward together with the pressure receiving member C in the pipe frame 5, so that the influence of the rear impact load on the occupant is mitigated.

  The lower frame 6 is a plate-like member extending in the left-right direction. The lower frame 6 is joined and connected to the lower part of each side frame 4 and is joined to the lower part 51 of the pipe frame 5. As a result, the load applied to the bracket 7 from the outside in the left-right direction is transmitted to the left-right opposite side of the bracket 7 via the lower frame 6 and the lower part 51 of the pipe frame 5 described above.

  The bracket 7 is a component that is formed separately from the pipe frame 5 and the side frame 4, and is joined so as to be adjacent to the left side (laterally outer side) of the left side (one) side frame 4. Specifically, the bracket 7 is disposed in the vicinity of a side panel (other member) such as a side pillar or a door of the vehicle, and a side impact load applied to the vehicle is input via the side panel. ing.

  As shown in FIG. 2, the bracket 7 is directly fixed to the pipe frame 5 by welding through two holes 41 (openings) formed in the side frame 4. Thereby, it is possible to transmit the load from the bracket 7 to the pipe frame 5 without being affected by the deformation of the side frame 4 regardless of the input angle or the magnitude of the side impact load. It has become. In FIGS. 2 and 4, the welded portion is indicated by dot hatching.

  Specifically, the bracket 7 is configured by fitting a front box-shaped member 8 and a rear box-shaped member 9 which are divided in the front-rear direction, and each box when cut by a plane orthogonal to the left-right direction. The closed members 8 and 9 form a closed cross-sectional shape.

  The front box-shaped member 8 includes a plate-like front wall 81 that extends longer in the vertical direction than the left-right direction, an upper wall 82 that extends rearward from the upper end of the front wall 81, and a rearward end from the laterally outer end of the front wall 81. An extending outer wall 83 and a lower wall 84 extending rearward from the lower end of the front wall 81 are integrally provided. That is, the front box-shaped member 8 is formed in a box shape that opens rearward and inward in the left-right direction.

  In the front wall 81, two concave portions 81a (concave and convex shapes) that are recessed inward in the front-rear direction are formed side by side at a predetermined interval in a portion away from the upper and lower ends of the front wall 81. Thereby, since the rigidity of the front wall 81 is improved, it is possible to satisfactorily transmit the side impact load to the pipe frame 5 by the highly rigid front wall 81. Furthermore, by forming the recess 81a away from the upper and lower ends of the front wall 81 in this way, the corners at the upper and lower ends of the front wall 81 can be formed continuously from side to side. It is also possible to satisfactorily transmit the load from the outside in the left-right direction to the inside.

  Moreover, each recessed part 81a is opening in the front and the horizontal direction inner side by forming in the edge part 81b inside the horizontal direction of the front wall 81. As shown in FIG. As a result, the edge 81c of the end portion 81b is bent back and forth, so that the rigidity of the edge 81c on the output side of the side impact load can be increased, and the side impact load can be transmitted to the pipe frame 5 and the like. It is possible.

  The bottom wall 81d of each recess 81a is formed with an extending portion 81e (a part of the input member on the inner side in the left-right direction) that extends inward in the left-right direction with respect to the edge 81c of the front wall 81. The extending portion 81e extends to the pipe frame 5 through the hole 41 of the side frame 4 described above, and is welded in a state of being abutted against the pipe frame 5.

  By adopting a structure in which only the extended portion 81e is passed through the hole 41 in this manner, the size of the hole 41 may be made to be a size corresponding to the extended portion 81e. 4 can be improved. Specifically, in the present embodiment, the hole 41 is formed to be smaller than the front-rear width of the pipe frame 5, is smaller than the vertical length of the entire edge 81c of the front wall 81, and is higher than the extended portion 81e. The shape of the long hole is large.

  The size of the hole 41 may be at least equal to or smaller than the area of the cross-sectional shape of the end portion (the end portion on the side that outputs the side impact load) of the bracket 7 in the left-right direction. When the hole 41 is formed in such a size, for example, the rigidity of the side frame 4 can be increased as compared with a case where a hole having a size that allows the entire end of the bracket 7 on the inner side in the left-right direction to pass therethrough is formed. It is possible.

  In the present embodiment, the extending portion 81e is provided, but the present invention is not limited to this, and the extending portion 81e may not be provided. In this case, there is a slight gap between the pipe frame 5 and the edge 81c of the front wall 81, but welding is possible even if such a gap is left, and the pipe frame 5 and the bracket 7 Can be fixed directly.

  Moreover, the extending part 81e is being fixed to the center part 5a in the front-back direction of the pipe frame 5, as shown to Fig.3 (a). Thereby, since the load from the bracket 7 is concentrated and transmitted to the center part 5a of the pipe frame 5, it is possible to transmit the load better.

  The center 5 b in the front-rear direction of the pipe frame 5 is located within the front-rear width of the bracket 7. Thereby, it is possible to prevent the bracket 7 from slipping back and forth on the cylindrical outer surface of the pipe frame 5 at the time of a side collision, so that it is possible to transmit the load better.

  As shown in FIG. 2, the upper and lower portions of the edge 81c of the front wall 81 are fixed to the side frame 4 by welding. That is, the front wall 81 is directly fixed to both the side frame 4 and the pipe frame 5. As a result, the load input to the bracket 7 is transmitted not only to the pipe frame 5 but also to the load transmission part (the lower frame 6 and the lower part 51 of the pipe frame 5) not only through the side frame 4, but the load is further improved. It is possible to communicate to. Note that the load transmitted to the load transmitting portion can be transmitted to the vehicle body side through a console box or the like provided on the side opposite to the bracket 7.

  As shown in FIG. 4, the rear box-shaped member 9 includes a plate-shaped rear wall 91 that extends longer in the vertical direction than the left-right direction, an upper wall 92 that extends forward from the upper end of the rear wall 91, and the rear wall 91. An outer wall 93 extending forward from the outer end in the left-right direction and a lower wall 94 extending forward from the lower end of the rear wall 91 are integrally provided. That is, the rear box-shaped member 9 is formed in a box shape that opens forward and inward in the left-right direction.

  In the rear wall 91, two concave portions 91a (concave and convex shapes) that are recessed inward in the front-rear direction are formed side by side at a predetermined interval in a portion away from the upper and lower ends of the rear wall 91. Thereby, since the rigidity of the rear wall 91 is improved, it is possible to favorably transmit the side impact load to the inside in the left-right direction by the rear wall 91 having high rigidity. Furthermore, by forming the recess 91a away from the upper and lower ends of the rear wall 91 in this way, the corners at the upper and lower ends of the rear wall 91 can be formed continuously from side to side, It is also possible to satisfactorily transmit the load from the outside in the left-right direction to the inside.

  Each recessed part 91a is arrange | positioned so that it may oppose each recessed part 81a of the front side box-shaped member 8 in front and back, Each bottom wall 91d and each bottom wall 81d of each recessed part 81a are shown to Fig.3 (a). So that they are in contact with each other. As a result, the two bottom walls 81d and 91d adjacent to each other form a thick portion at a substantially central portion in the front-rear direction of the bracket 7, so that the side impact load can be transmitted satisfactorily. Yes.

  Two bottom walls 81d and 91d adjacent to each other are joined by welding. Thereby, since the rigidity of bracket 7 can be raised, it is possible to transmit a side impact load satisfactorily.

  The two bottom walls 81 d and 91 d adjacent to each other are located within the front-rear width of the pipe frame 5. Thereby, it is possible to satisfactorily transmit the side impact load to the pipe frame 5 through the thickened portion by combining the two bottom walls 81d and 91d.

  Furthermore, the center 5b of the pipe frame 5 in the front-rear direction is located within the front-rear width of the thick portion including the bottom walls 81d and 91d. As a result, the load can be concentrated and transmitted to the vicinity of the center 5b of the pipe frame 5 through the thickened portion by combining the two bottom walls 81d and 91d.

  As shown in FIG. 4, the end 91 b on the inner side in the left-right direction of the rear wall 91 is fixed to the side frame 4 by welding. More specifically, as shown in FIG. 3A, the end portion 91 b on the inner side in the left-right direction of the rear wall 91 is formed by the rear portion 43 of the side frame 4 bent in an L shape and the left rear portion of the pipe frame 5. It is joined to the closed cross-sectional shape part to be formed. As a result, the side impact load transmitted from the rear wall 91 to the inner side in the left-right direction is favorably received by the closed cross-sectional shape portion and is successfully transmitted to the pipe frame 5.

  Further, as shown in FIGS. 2 and 3, the upper wall 92, the outer wall 93 and the lower wall 94 of the rear side box-shaped member 9 are covered with the upper wall 82, the outer wall 83 and the lower wall 84 of the front side box-shaped member 8. And fixed to each of the walls 82 to 84 by welding.

  As a result, as shown in FIG. 3 (b), the upper wall 72 of the box-like member 8, 9 is placed on the upper wall 72 of the bracket 7 at a position away from the front and rear ends. A step 72a (uneven shape) is formed by overlapping the shape portions. Therefore, the substantially central portion of the upper wall 72 in the front-rear direction is formed thick by overlapping the upper walls 82 and 92, so that the rigidity of the upper wall 72 is increased and the side impact load is transmitted favorably. It is possible.

  Furthermore, by forming the step 72a (uneven shape) away from the front and rear ends of the upper wall 72, the corners at the front and rear ends of the upper wall 72 can be formed continuously from side to side. It is also possible to satisfactorily transmit the load from the outside in the left-right direction to the inside by the corners.

  Similarly, as shown in FIGS. 3A and 3C, the outer walls 83 and 93 and the lower walls 84 and 93 of the box-shaped members 8 and 9 are also formed on the outer wall 73 and the lower wall 74 of the bracket 7. Steps 73a and 74a are formed by superimposing 94. Thereby, also in the outer wall 73 and the lower wall 74, rigidity is enhanced and corners at the front and rear ends of the lower wall 74 are continuously formed on the left and right sides, so that the load can be transmitted well from the outside in the left-right direction to the inside. Is possible.

  Further, the steps 72 a, 73 a, and 74 a are continuous over the upper wall 72, the outer wall 73, and the lower wall 74 of the bracket 7 by fitting the rear side box-like member 9 so as to cover the front side box-like member 8. Is formed. As a result, the thick portion of the outer wall 73 is formed continuously with the thick portions of the upper wall 72 and the lower wall 74, so that the side impact load received by the thick portion of the outer wall 73 is continuously increased in the upper and lower thicknesses. It can be transmitted to the inside in the left-right direction through the thick part.

The effects of the vehicle seat of the present embodiment as described above are summarized below.
Since the portions of the front wall 81 and the rear wall 91 of the bracket 7 that are separated from the upper and lower ends have an uneven shape (recessed portions 81a and 91a), the rigidity of the walls 81 and 91 is increased, and thus the thickness of the bracket 7 is thin. Even if it is a case, buckling of each wall 81 and 91 is suppressed, and a load can be favorably transmitted from the left-right direction outer side to the inner side. And since the thickness of the bracket 7 can be made thin by raising rigidity by this uneven | corrugated shape, the weight reduction of a vehicle seat can also be achieved.

  In addition, since the upper and lower ends of the front wall 81 and the rear wall 91 are not provided with irregular shapes, the corners at the upper and lower ends of the front wall 81 and the rear wall 91 can be formed continuously on the left and right sides. A load can also be favorably transmitted from the laterally outer side to the inner side by the portion.

  Since the edge 81c on the inner side in the left-right direction of the front wall 81, which is the output side of the side impact load, is bent back and forth, the rigidity of the edge 81c increases, and the side impact load can be output satisfactorily.

  Concave portions 81 a and 91 a are formed in both the front wall 81 and the rear wall 91 of the bracket 7, and a portion that is thickened by aligning the bottom walls 81 d and 91 d in the front-rear width of the bracket 7 is disposed. Therefore, the rigidity of the bracket 7 in the front wall 81 and the rear wall 91 of the bracket 7 and the bracket 7 can be increased, and the load can be transmitted better.

  Since the bottom walls 81d and 91d are positioned within the front-rear width of the pipe frame 5, the load transmitted to the bottom walls 81d and 91d can be efficiently transmitted to the pipe frame 5.

  Since the center 5b of the pipe frame 5 is located within the front-rear width of the bottom walls 81d and 91d, the load transmitted to the bottom walls 81d and 91d can be concentrated and transmitted near the center of the pipe frame 5. it can.

Although the embodiments of the present invention have been described above, the present invention can be implemented with appropriate modifications as shown in other embodiments below.
In the said embodiment, although the recessed part 81a, 91a was employ | adopted as an uneven | corrugated shape, this invention is not limited to this, A convex part may be sufficient.

  In the embodiment, the recesses 81a and 91a are formed on both the front wall 81 and the rear wall 91. However, the present invention is not limited to this, and it is only necessary to form an uneven shape on at least one of the front and rear walls.

  In the above-described embodiment, the concave portion 81a of the front wall 81 is formed at the end portion on the inner side in the left-right direction of the front wall 81 so as to open inward in the left-right direction. You may form in the edge part of the left-right direction inner side of a rear wall so that it may open to a direction inner side.

  Moreover, you may form a recessed part in the edge part of the left-right direction outer side of a front wall or a rear wall so that it may open not in the left-right direction inner side but the left-right direction outer side. According to this, since the edge on the input side of the side impact load in the input member can be bent back and forth, the side impact load can be favorably input to the input member.

  Furthermore, you may provide a recessed part in the both ends of the inner side in the left-right direction, and an outer side. According to this, since both the input side and output side edges of the side impact load in the input member can be bent back and forth, the side impact load can be input and output satisfactorily.

  In the said embodiment, although the base frame was comprised with the side frame 4 and the pipe frame 5, this invention is not limited to this, For example, you may comprise only a side frame or only a pipe frame.

  In the above embodiment, the cylindrical pipe frame 5 is adopted as the inner frame, but the present invention is not limited to this, and may be a polygonal pipe frame, a cylinder, a polygonal columnar member, or the like.

  In the above-described embodiment, the input member is the bracket 7 including the two box-shaped members 8 and 9, but the present invention is not limited to this, and for example, a bracket configured by one box-shaped member may be used.

  In the said embodiment, although the load transmission part was comprised with the lower frame 6 and the lower part 51 of the pipe frame 5, this invention is not limited to this. For example, in the above-described embodiment, the load transmitting portion (lower part 51) is integrally formed with the pipe frame 5 which is the inner frame. However, when the pipe frame is formed in a U-shape opening downward, each pipe frame 5 A separate frame connecting the lower end portions may be used as the load transmitting portion. In addition, for example, when the lower part 51 of the pipe frame 5 in the above embodiment is divided in the middle and joined to the lower frame 6, the lower part 51 and the lower frame 6 that extend partway may be used as the load transmitting portion.

In the said embodiment, although the bracket 7 and the pipe frame 5 were fixed by welding, this invention is not limited to this, For example, you may fix with a volt | bolt etc.
In the embodiment, the hole 41 is employed as the opening. However, the present invention is not limited to this, and may be, for example, a notch opening forward or backward.

  In the above-described embodiment, a part of the bracket 7 (the extended portion 81e) is passed through the opening (hole 41). However, the present invention is not limited to this, and a part of the inner frame is passed through the opening and fixed directly to the bracket. May be.

  In the above embodiment, the entire inner frame (pipe frame 5) has a closed cross-sectional shape. However, the present invention is not limited to this, and at least a portion of the inner frame to which the input member is fixed may have a closed cross-sectional shape. That's fine.

  In the above embodiment, the input member is a member that receives a vehicle side impact load. However, the present invention is not limited to this, and may be a member that receives a load from an occupant, such as an armrest mounting member. It may be a member that receives a load from the airbag when the airbag unit is operated, such as an attachment member. Further, for example, a member that receives its own weight (load), such as a motor, may be used, such as an attachment member for attaching a heavy motor or the like.

  In the said embodiment, although the input member was provided in the outer side of the side frame, this invention is not limited to this. For example, when a plate-like side frame is further provided on the inner side in the left-right direction of the inner frame (pipe frame 5) in the embodiment, an armrest mounting member as described above is disposed on the inner side in the left-right direction of the side frame. The armrest mounting member or the like may be directly fixed to the reinforcing member.

1 Seat Frame 4 Side Frame 5 Pipe Frame 6 Lower Frame 7 Bracket 81 Front Wall 81a Recess 91 Rear Wall 91a Recess

Claims (6)

A base frame constituting left and right portions of the seat back frame;
An input member that is provided adjacent to one base frame in the left-right direction and receives a load from another member;
The input member has a closed cross-sectional shape, and a portion away from the upper and lower ends of at least one of the front wall and the rear wall has an uneven shape ,
The concavo-convex shape is formed as a concave portion recessed inward in the front-rear direction on at least one of the front wall and the rear wall,
The vehicle seat , wherein the input member is fixed to the base frame above or below the recess . The base frame is
Left and right side frames constituting left and right portions of the seat back frame;
A side frame that is adjacent to one side frame in the left-right direction, and has a reinforcing frame that reinforces the side frame,
The vehicle seat according to claim 1, wherein the concave portion of the input member is fixed to the reinforcing frame. The vehicle seat according to claim 1, wherein the recess is formed in both the front wall and the rear wall. 4. The vehicle seat according to claim 1, wherein an upper end portion and a lower end portion of the input member are fixed to the base frame. 5. The recess is formed in both the front wall and the rear wall;
The vehicular seat according to any one of claims 1 to 4, wherein a bottom wall of the concave portion of the front wall and a bottom wall of the concave portion of the rear wall are joined. The base frame is
Left and right side frames constituting left and right portions of the seat back frame;
A side frame that is adjacent to one side frame in the left-right direction, and has a reinforcing frame that reinforces the side frame,
The rear part of the side frame is bent inward in the left-right direction,
The side frame is fixed to the reinforcing frame so as to form a closed cross-sectional shape portion with the rear portion and the reinforcing frame,
The vehicle seat according to any one of claims 1 to 5, wherein the input member is fixed at a position corresponding to the closed cross-sectional shape portion of the side frame.

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