JP2017094821A - Seat frame for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat frame for a vehicle of which a desired strength can be maintained while achieving reduction in numbers of components.SOLUTION: A bracket 35 is provided on a connection part between a rod 21 of a seat frame and a side frame 28. A bridge part 54 of the bracket 35 is so provided as to be bridged between a first support part 41 of a leg 24 and the side frame 28. The bracket 35 not only connects the first support part 41 and the rod 21 by a first fitting part 51, but also connects the first support part 41 and the side frame 28 by the bridge part 54. Thus, a strength of the seat frame can be maintained while achieving reduction in numbers of components thereof.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vehicle seat frame mounted on a vehicle such as an automobile, an airplane, a ship, and a train.

  Conventionally, some vehicle seats mounted on a vehicle include a seat frame that holds a cushion pad at a predetermined height from the floor surface of the vehicle (for example, Patent Document 1). The seat frame disclosed in Patent Document 1 includes a side frame that is disposed to face the vehicle in the width direction, and a tubular rod that connects the side frames to each other. The side frame is held at a predetermined height by a leg portion fixed to the floor of the vehicle.

  The leg portion is formed in a downward direction from the front end portion of the side frame, is curved rearward at the lower end portion, is extended toward the rear direction, and is further substantially U-shaped to be extended further upward. I am doing. The side frame is disposed in the front-rear direction so as to connect both ends of the U-shape. A reinforcing body is provided on the inner side of the leg portion. The reinforcing body is disposed in an oblique direction from the front lower end portion of the leg portion toward the rear upper end portion. This reinforcing body is for suppressing, for example, the leg portion from buckling so as to fall forward or backward due to an external force applied in the event of a vehicle collision or the like.

JP 2012-162131 A

  The above-described reinforcing body is disposed below the cushion pad, is easily noticeable to the vehicle occupant, and has a poor appearance. In addition, there is a possibility that the ride comfort may be lowered, for example, when the feet of a passenger sitting on the cushion pad hit the reinforcing body. However, when the reinforcing body is simply eliminated, the strength of the seat frame is reduced even if the number of parts can be reduced.

  In view of the above circumstances, the problem to be solved by the present invention is to provide a vehicle seat frame capable of maintaining a desired strength while reducing the number of parts.

  In order to solve the above problems, a vehicle seat frame according to claim 1 of the present application is provided on a vehicle floor, and a pair of support frames that support the vehicle seat and an upper end portion of the pair of support frames are connected to each other. In a virtual plane that is provided at a connecting portion that connects the cushion frame that connects and mounts the cushion pad and at least one of the pair of support frames and the cushion frame, and is partitioned by the pair of support frames and the cushion frame. And a bracket that bridges and connects at least one of the pair of support frames and the cushion frame.

  The vehicle seat frame according to claim 2 is the vehicle seat frame according to claim 1, wherein the support frame has an outer surface that intersects the virtual plane and faces outward, and the bracket is A first mounting portion that is formed in a flat plate shape along the outer surface and is fixed to the outer surface; and a bridge portion that extends from the support frame to the cushion frame on the virtual surface and is fixed to the cushion frame. Features.

  The vehicle seat frame according to claim 3 is the vehicle seat frame according to claim 2, wherein the support frame has an inner side surface that is continuous with the outer surface and is disposed to face the virtual surface. The bracket has a second mounting portion that extends from the first mounting portion and has a flat plate shape along the inner side surface and is fixed to the inner side surface.

  Further, the vehicle seat frame according to claim 4 is the vehicle seat frame according to claim 2 or claim 3, wherein the bridge portion has the connection frame and the cushion frame as a vertex, and the support frame and the cushion frame. Each of the cushion frames is formed in a substantially triangular shape having two sides.

  Further, the vehicle seat frame according to claim 5 is the vehicle seat frame according to any one of claims 2 to 4, wherein the bridge portion is along a line connecting the support frame and the cushion frame, It has a throttle part bent or curved.

  The vehicle seat frame according to claim 6 is a vehicle seat frame according to any one of claims 1 to 5, wherein a pair of cushion frames are provided, and a connecting member that connects the pair of cushion frames. The bracket is fixed to the connecting member at the connecting portion between the support frame and the cushion frame.

  According to a seventh aspect of the present invention, there is provided the vehicle seat frame according to the sixth aspect, wherein the connecting member extends from one of the pair of cushion frames toward the other, and the other portion of the connecting portion is the other. The bracket is extended outward with respect to the cushion frame, and the bracket is fixed to the extended tip portion of the connecting member.

  In the vehicle seat frame according to the first aspect, each of the upper ends of the pair of support frames provided on the floor is connected by the cushion frame. The pair of support frames and the cushion frame are connected to each other to define a virtual surface. The member that divides the virtual plane may include a vehicle floor. The bracket is provided at a connection portion between at least one of the pair of support frames and the cushion frame. The bracket is provided in a bridging manner in an imaginary plane defined by the support frame and the cushion frame, that is, an inner portion where the support frame and the cushion frame form an inner angle, and is connected to the two frames. Here, conventionally, for example, a bracket may be used to join a connecting member that connects a plurality of cushion frames and a support frame. In this case, for example, a bracket for joining the connecting member and the support frame, which has been used conventionally, is also used for connecting the support frame and the cushion frame, so that it is not necessary to separately provide a reinforcing body or the like in the conventional literature. The number of parts can be reduced. Furthermore, by reinforcing the strength with the bracket, it is possible to suppress buckling of the support frame at the time of a vehicle collision or the like. Further, by simplifying the member disposed below the cushion pad, it is possible to improve the appearance of the portion that is easily noticeable by the occupant.

  In the vehicle seat frame according to the second aspect, the first attachment portion is fixed to the outer surface of the support frame. The bridge portion extends from the support frame toward the cushion frame in the virtual plane. In such a configuration, the bracket is provided so as to be wound around the support frame at the first attachment portion and the bridge portion, and more firmly connects the support frame and the cushion frame, and the seat of the support frame. It becomes possible to suppress bending.

  In the vehicle seat frame according to claim 3, in addition to the first mounting portion fixed to the outer surface, the bracket is fixed to the support frame by fixing the second mounting portion to the inner side surface adjacent to the outer surface. Can be attached more firmly. In addition, the bracket is provided so as to surround the virtual surface side, the outer surface, and the inner surface of the support frame by the first mounting portion, the second mounting portion, and the bridge portion, so that the support frame and the cushion frame are more firmly secured. It becomes possible to connect.

  In the vehicle seat frame according to the fourth aspect, the bridge portion is formed in a substantially triangular shape covering the connecting portion between the support frame and the cushion frame, and the support frame and the cushion frame can be reinforced.

  In the vehicle seat frame according to the fifth aspect, the bridge portion is provided with a throttle portion so as to connect the support frame and the cushion frame. When the support frame is buckled and tilted at the time of a vehicle collision, the support frame is displaced in a direction close to the cushion frame (a direction in which the internal angle is reduced) or a direction away from the cushion frame (a direction in which the internal angle is increased). External force is applied. On the other hand, the bridge portion can increase the rigidity against the external force acting in the direction of reducing or increasing the internal angle by providing a throttle portion that connects the two frames. Therefore, it is possible to effectively suppress buckling and the like of the support frame.

  In the vehicle seat frame according to the sixth aspect, the bracket is also fixed to the connecting member. As a result, the support frame is fixed to the connecting member in addition to the cushion frame, so that buckling of the support frame can be more reliably suppressed.

  In the vehicle seat frame according to the seventh aspect, the bracket is fixed to the distal end portion of the connecting member protruding outward from the cushion frame, so that a certain distance can be secured between the bracket and the cushion frame. As a result, for example, the bracket can be bent in a direction approaching from a position separated from the cushion frame by a certain distance, thereby forming a throttle portion.

1 is an external view of a vehicle seat according to an embodiment of the present invention (a cushion pad, a back frame, and a back pad are indicated by dotted lines). It is a disassembled perspective view of FIG. 1, and is a figure which shows each member arrange | positioned at the left side of a seat frame. It is the enlarged view of the part which attached the bracket of the front side in a seat frame, and is the perspective view which looked at the bracket from the left front. It is the enlarged view of the part which attached the bracket of the front side in a seat frame, and is the perspective view which looked at the bracket from the right rear. It is sectional drawing cut | disconnected by the AA line shown in FIG. 3, and was seen from upper direction. It is sectional drawing seen from the front, cut | disconnected by the BB line shown in FIG. It is the enlarged view of the part which attached the bracket of the back side in a seat frame, and is the perspective view which looked at the bracket from the left side back. It is the enlarged view of the part which attached the bracket of the back side in a seat frame, and is the perspective view which looked at the bracket from right side back.

  Hereinafter, a seat frame which is an embodiment of a vehicle seat frame of the present invention will be described with reference to the drawings. FIG. 1 shows an external view of a vehicle seat 10 including a seat frame 9 of the present embodiment. In FIG. 1, the cushion pad 12, the back frame 13, and the back pad 14 are illustrated by dotted lines. In FIG. 1, the back frame 13 is schematically shown. Moreover, in the following description, as shown in FIG. 1, each direction of the vehicle seat 10 when attached to the vehicle will be referred to as an up-down direction, a left-right direction, and a front-rear direction. In this case, the left-right direction is, for example, a direction parallel to the width direction of the vehicle. FIG. 1 also shows a two-seat vehicle seat 10 as an example of a vehicle seat.

  As shown in FIG. 1, the seat frame 9 included in the vehicle seat 10 includes a cushion frame 11, a back frame 13, and a leg portion 24. The cushion pad 12 is for a passenger to sit on and is supported by the cushion frame 11. The back frame 13 is connected to a rear portion of the cushion frame 11 and supports a back pad 14 that serves as a backrest for the occupant. As the cushion pad 12 and the back pad 14, for example, a known material in which a cushioning material is covered with a skin can be employed.

  The cushion frame 11 is a metal member and includes a pair of rods 21 and 22, a connecting frame 27, and a pair of side frames 28 and 29. Each of the rods 21 and 22 is a metallic tubular member, and is disposed along a direction parallel to the left-right direction. The rod 21 is juxtaposed with the rod 22 at a predetermined interval in the front-rear direction. The rear-side rod 22 has a large-diameter (thick) tubular shape as compared with the front-side rod 21.

  Each of the rods 21 and 22 is connected to each other by the connection frame 27 and the side frames 28 and 29. The connection frame 27 extends in a direction parallel to the front-rear direction, and connects the central portions of the rods 21 and 22 in the left-right direction. Both ends of the connecting frame 27 in the front-rear direction are joined to each of the rods 21 and 22 by, for example, arc welding.

  Each of the side frames 28 and 29 is provided at each of the left and right ends of the rods 21 and 22. The left side frame 28 extends in a direction parallel to the front-rear direction, and connects the left end portions 21A and 22A (see FIG. 2) of the rods 21 and 21 to each other. Similarly, the right side frame 29 extends in a direction parallel to the front-rear direction, and connects the right end portions of the rods 21 and 22 to each other. Each of the side frames 28 and 29 is joined to each of the rods 21 and 22 by welding or the like. The rods 21 and 22 are coupled by the coupling frame 27 and the side frames 28 and 29 in a state of being positioned in parallel to each other.

  A support wire 15 is provided between the connecting frame 27 and the left side frame 28 in the left-right direction. The support wire 15 of this embodiment includes four vertical wires 15A extending in a direction parallel to the front-rear direction, and a horizontal wire 15B extending in a direction parallel to the left-right direction and connecting the vertical wires 15A to each other. Have. The support wire 15 is formed by bending a hard steel wire, for example. The front end portion of the vertical wire 15A is curved in an arc shape in accordance with the shape of the outer peripheral surface of the tubular rod 21, and is joined by welding or the like with the curved portion engaged from above the rod 21. Yes. Similarly, the rear end portion of the vertical wire 15A is curved in an arc shape in accordance with the shape of the outer peripheral surface of the tubular rod 22, and welding or the like is performed with the curved portion engaged from the upper side of the rod 22. Are joined by.

  A support wire 15 having the same configuration as the support wire 15 provided between the connection frame 27 and the side frame 28 is provided between the connection frame 27 and the right side frame 29 in the left-right direction. . The cushion pad 12 is supported from below by the rods 21 and 22, the connecting frame 27, the side frames 28 and 29, and the support wire 15.

  Further, the cushion frame 11 has a vehicle fixing portion 31 attached to the right end portion of the rod 21 and a vehicle fixing portion 32 attached to the right end portion of the rod 22. These vehicle fixing parts 31 and 32 are fixed to the side surface of the vehicle, for example.

  FIG. 2 is an exploded perspective view of FIG. 1 and shows each member arranged on the left side of the seat frame 9. As shown in FIGS. 1 and 2, the leg portion 24 is disposed below the left end portions 21 </ b> A and 22 </ b> A of the rods 21 and 22 and the side frame 28. The leg portion 24 is a metal cylindrical member. The cross section of the leg portion 24 has a rectangular shape that is long in the left-right direction at the bottom portion 43.

  The leg portion 24 extends downward from a first support portion 41 extending downward from a connecting portion between the rod 21 on the front side and the side frame 28 and a connecting portion between the rod 22 on the rear side and the side frame 28. It has the 2nd support part 42 extended toward the bottom, and the bottom part 43 which connects the lower end part of the 1st support part 41 and the 2nd support part 42 mutually.

  The 1st support part 41 is formed along the direction parallel to the up-and-down direction, and the lower end part is curving back. Moreover, the 2nd support part 42 is formed along the direction parallel to an up-down direction, and the lower end part curves to the front side. The bottom portion 43 is formed continuously with the curved lower end portions of the first support portion 41 and the second support portion 42, and is formed along a direction parallel to the front-rear direction. Accordingly, the leg portion 24 has a U-shape when viewed from the left-right direction. The side frame 28 and the leg portion 24 are connected to each other, thereby defining a virtual plane V1 indicated by a virtual line in FIG.

  The bottom 43 is fixed to the vehicle floor by a fastening member (not shown). The bottom 43 may be directly fixed to the vehicle floor, or may be indirectly fixed via an intermediate member or the like fixed to the floor. The cushion frame 11 is fixed at a predetermined position inside the vehicle by fixing the leg portion 24 to the floor of the vehicle and fixing the vehicle fixing portions 31 and 32 to the side surface of the vehicle. The rod 21 is supported by the leg portion 24, and is held at a position away from the floor surface of the vehicle by the height of the leg portion 24 in the vertical direction. Further, the cushion pad 12 is supported by the rod 21 and is held at a position away from the floor surface by the height of the leg portion 24.

(About the front bracket 35)
Next, the bracket 35 disposed on the front side of the side frame 28 will be described. A bracket 35 is attached to a connecting portion of the rod 21, the side frame 28, and the first support portion 41. FIG. 3 is an enlarged view of a portion of the seat frame 9 where the bracket 35 is attached, and is a perspective view of the bracket 35 as viewed from the left front side. FIG. 4 is an enlarged view of a portion of the seat frame 9 to which the bracket 35 is attached, and is a perspective view of the bracket 35 viewed from the right rear side.

  As shown in FIGS. 2 to 4, the side frame 28 is formed continuously from the side surface 28 </ b> A, the upper surface 28 </ b> B continuously formed on the upper end of the side surface 28 </ b> A and extending toward the right side, and the lower end of the side surface 28 </ b> A. And a lower surface 28C extending toward the right side. The side frame 28 is formed with, for example, a side surface 28A by pressing a single metal plate. The cross-sectional shape obtained by cutting the side frame 28 along a plane orthogonal to the front-rear direction is substantially U-shaped with an opening on the right side. The width in the vertical direction of the side surface 28A gradually increases upward as it goes from the front to the rear.

  A concave portion 28D is formed at the front end of the side surface 28A. The concave portion 28D is formed in a circular arc shape in accordance with the shape of the outer peripheral surface of the left end portion 21A of the rod 21. The side frame 28 is joined to the rod 21 with the left end 21A fitted in the recess 28D. The left end 21A protrudes further to the left from the portion joined to the recess 28D.

  Further, the front end portion of the upper surface 28B has a flat plate shape protruding toward the right side, and is in contact with the upper portion of the left end portion 21A (see FIG. 4). Similarly, the front end portion of the lower surface 28C has a flat plate shape protruding toward the right side, and is in contact with the lower portion of the left end portion 21A (see FIG. 4). The left end 21A is fitted into the recess 28D and is fixed by welding or the like while being sandwiched between the upper surface 28B and the lower surface 28C of the side frame 28.

  The bracket 35 is formed by, for example, pressing a metal plate, and includes a first attachment portion 51, a second attachment portion 52, and a bridge portion 54. The first attachment portion 51 has a flat plate shape along the plane of the front end surface 41 </ b> A of the first support portion 41. A through hole 51 </ b> A is formed in the first attachment portion 51 so as to penetrate in the front-rear direction. The front end surface 41A is a plane along the vertical direction and the horizontal direction, and has a relationship intersecting the virtual surface V1 described above.

  The through hole 51 </ b> A is formed on the upper side of the vertical center of the first mounting portion 51 and has an elliptical shape extending in the vertical direction. 5 is a cross-sectional view taken along line AA shown in FIG. 3 and viewed from above. As shown in FIG. 5, the first attachment portion 51 is welded at a part of the through-hole 51A and joined at the welded portion P1 while being in contact with the front end surface 41A.

  Moreover, as shown in FIG. 3, the 1st attaching part 51 has the lower end part welded with 41 A of front end surfaces, and is joined in the welding part P2. A support plate 51 </ b> B that protrudes upward from the upper end portion is formed on the upper portion of the first mounting portion 51. The support plate 51B has a flat plate shape, is slightly inclined forward from the upper end portion of the first attachment portion 51, and is in contact with the surface of the left end portion 21A. The support plate 51B is welded to a portion on the front side of the left end 21A, and is joined at the weld P3.

  As shown in FIGS. 2 to 4, the first mounting portion 51 is formed with a protruding portion 51 </ b> C that protrudes to the left in the upper portion from the central portion in the vertical direction. The protrusion 51C has a shape in which the width in the left-right direction is gradually narrowed from the top to the bottom. The protruding portion 51C protrudes leftward from the portion of the first mounting portion 51 that contacts the front end surface 41A, and is disposed at a position that does not face the first support portion 41 in the front-rear direction (see FIG. 5). As will be described later, a space S surrounded by the left end surface 41B of the first support portion 41 and the bridge portion 54 is formed behind the protruding portion 51C (see FIG. 5). The projecting portion 51C is formed with a through hole 51D that communicates with the outside through the space S in the front-rear direction.

  As shown in FIG. 4, the second attachment portion 52 has a flat plate shape along the plane of the right end surface 41 </ b> C of the first support portion 41. The right end surface 41C is in a relationship facing the virtual surface V1 in the left-right direction. In the second attachment portion 52, a through hole 52A penetrating in the left-right direction is formed in a portion above the center portion in the up-down direction. The through hole 52A has an elliptical shape that is long in the vertical direction. The second attachment portion 52 is in contact with the right end surface 41C, and a part of the through hole 52A is welded and joined at the welded portion P4.

  A wide portion 52 </ b> B extending rearward from a position in contact with the right end surface 41 </ b> C is formed on the upper portion of the second attachment portion 52. In addition, a narrow portion 52C having a narrower width in the front-rear direction than the right end surface 41C is formed in the lower portion of the second attachment portion 52. In addition, a concave portion 52D formed in an arc shape in accordance with the shape of the outer peripheral surface of the left end portion 21A is formed at the upper end portion of the second mounting portion 52. The recess 52D is formed along the outer peripheral surface of the left end 21A so as to go from the lower side of the left end 21A to the rear side. Therefore, the upper end portion of the wide portion 52B extends to the rear side of the left end portion 21A. The second attachment portion 52 is welded to the rod 21 with the left end portion 21A fitted in the recess 52D, and is joined at the weld portion P5.

  As shown in FIG. 3, the bridge portion 54 has a first fixing portion 54A, a bulging portion 54B, a second fixing portion 54C, and a connecting portion 54D. The bridge portion 54 extends from the left end portion of the first attachment portion 51 toward the side frame 28, and is attached in a bridging manner between the first support portion 41 and the side frame 28. The bridge portion 54 is provided so as to straddle an inner portion where the first support portion 41 and the side frame 28 are connected with a predetermined inner angle. When viewed from the left-right direction, the bridge portion 54 has a substantially right triangle shape having sides along the front-rear direction and the up-down direction.

  The first fixing portion 54 </ b> A is provided at the lower end portion of the bridge portion 54 and is in contact with the left end surface 41 </ b> B of the first support portion 41. 54 A of 1st fixing parts have comprised the plate shape formed toward the direction parallel to an up-down direction, making the width | variety of the front-back direction constant. The width of the first fixing portion 54A in the front-rear direction is narrower than that of the left end face 41B. In the bridge portion 54, the side edge portion on the rear side of the first fixing portion 54A is welded to the left end surface 41B in a state where the first fixing portion 54A is in contact with the left end surface 41B, and is joined at the welded portion P6. .

  The bulging portion 54B is formed continuously from the upper end portion of the first fixing portion 54A and the left end portion of the protruding portion 51C, and is formed to bulge to the left side so as to be separated from the left end surface 41B. A space S surrounded by the left end face 41B and the protruding portion 51C is formed on the right side of the bulging portion 54B, that is, inside the bulging portion 54B (see FIG. 5). The bulging portion 54B is formed so as to spread toward the rear side from the bottom to the top. Therefore, the space S is expanded from the bottom to the top.

  In addition, a concave portion 54F formed in an arc shape in accordance with the shape of the outer peripheral surface of the left end portion 21A is formed at the upper end portion of the bulging portion 54B. The recess 54F is formed along the outer peripheral surface of the left end 21A so as to go from the lower side of the left end 21A to the rear side. The bridge portion 54 is welded to the rod 21 in a state where the left end portion 21A is fitted in the concave portion 54F, and is joined at the weld portion P7.

  The second fixing portion 54C is fixed to the side surface 28A of the side frame 28. The second fixing portion 54C has a flat plate shape along the plane of the side surface 28A, and has a substantially triangular shape that spreads downward from the rear toward the front with the rear end as a vertex. The upper side edge portion of the second fixed portion 54C is formed in a direction parallel to the front-rear direction. In the bridge portion 54, the outer peripheral portion of the second fixing portion 54C is welded to the side frame 28 in a state where the second fixing portion 54C is in contact with the side surface 28A, and is joined at the welding portion P8.

  The connecting portion 54D connects the upper end portion on the rear side of the first fixed portion 54A and the lower end portion of the second fixed portion 54C. The connecting portion 54D has a plate shape with a narrow width in the front-rear direction, and extends from the upper end portion on the rear side of the first fixed portion 54A toward the upper rear side.

  The narrowed portion 54E is formed in each of a connecting portion between the bulging portion 54B and the second fixing portion 54C and a connecting portion between the bulging portion 54B and the connecting portion 54D. The drawn portion 54E is formed by drawing a flat metal member, for example. As shown in FIG. 5, the bulging portion 54 </ b> B is located on the left side of the position of the side frame 28. The narrowed portion 54E is curved from the connection portion with the bulging portion 54B toward the second fixing portion 54C and the connecting portion 54D on the right side. As shown in FIG. 3, the throttle portion 54 </ b> E forms a curve connecting the left end surface 41 </ b> B of the first support portion 41 and the side surface 28 </ b> A of the side frame 28. More specifically, the narrowed portion 54E is formed from the lower end portion of the protruding portion 51C and the bulging portion 54B toward the upper rear side, and is the upper end portion of the bridge portion 54 that is the bulging portion 54B and the second fixing portion. It is formed up to a position between 54C and the front-rear direction.

  FIG. 6 shows a cross-sectional view taken along the line BB shown in FIG. 3 and viewed from the front. As shown in FIG. 6, the relative position of the rod 21 and the first support portion 41 is fixed by the bracket 35 with a predetermined gap in the vertical direction. Further, the bulging portion 54B is joined in a state where the left end 21B of the rod 21 is fitted in the recess 54F. The tip 21B of the rod 21 is located on the left side of the position of the side frame 28. In other words, the rod 21 and the bridge portion 54 are joined to each other at a position on the left side of the position of the side frame 28.

(About the rear bracket 36)
Next, the bracket 36 disposed on the rear side of the side frame 28 will be described. In addition, about the structure similar to the bracket 35 of the front side mentioned above, the description is abbreviate | omitted suitably. As shown in FIG. 3, a bracket 36 is attached to a connecting portion of the rod 22, the side frame 28, and the second support portion 42.

  FIG. 7 is an enlarged view of a portion of the seat frame 9 to which the bracket 36 is attached, and is a perspective view of the bracket 36 viewed from the rear left side. FIG. 8 is an enlarged view of a portion of the seat frame 9 to which the bracket 36 is attached, and is a perspective view of the bracket 36 as viewed from the rear right side.

  As shown in FIGS. 7 and 8, the side surface 28 </ b> A of the side frame 28 is formed to protrude greatly upward in the rear side portion. A recess 28E for fitting and joining the left end 22A of the rod 22 is formed at the rear end and the lower end of the side surface 28A. The left end 22A of the rod 22 protrudes further to the left from the connecting portion with the recess 28E.

  The bracket 36 is formed by, for example, pressing a metal plate, and includes a first attachment portion 61, a second attachment portion 62, and a bridge portion 64. The first attachment portion 61 has a flat plate shape along the plane of the rear end surface 42A of the second support portion 42, and is joined by welding or the like in contact with the rear end surface 42A.

  In addition, a support plate 61 </ b> B protruding upward from the upper end portion is formed on the upper portion of the first mounting portion 61. The support plate 61B is joined to a portion on the rear side of the left end portion 22A by welding or the like. The first mounting portion 61 is formed with a protruding portion 61C that protrudes to the left. A space surrounded by the left end face 42B of the second support portion 42 and the bridge portion 64 is formed in front of the protruding portion 61C.

  The second attachment portion 62 has a flat plate shape along the plane of the right end surface 42C of the second support portion 42, and is joined to the right end surface 42C by welding or the like. An arc-shaped recess 62D joined by welding or the like with the left end 22A fitted therein is formed at the upper end of the second mounting portion 62.

  Moreover, the bridge part 64 has the 1st fixing | fixed part 64A, the bulging part 64B, the 2nd fixing | fixed part 64C, and the connection part 64D. The bridge portion 64 extends from the left end portion of the first mounting portion 61 toward the side frame 28 in the same manner as the front bridge portion 54, and bridges between the second support portion 42 and the side frame 28. Is attached.

  64 A of 1st fixing parts are provided in the lower end part of the bridge part 64, and are joined to the left end surface 42B. The bulging portion 64B is formed continuously from the upper end portion of the first fixing portion 64A and the left end portion of the projecting portion 61C, and is formed to bulge to the left side so as to be separated from the left end surface 42B. The bulging portion 64B is formed so as to expand to the front side from the bottom to the top. Further, the bulging portion 64B is joined to the rod 22 in a state where the left end portion 22A is fitted in the concave portion 64F (see FIG. 2) at the upper end portion.

  The second fixing portion 64 </ b> C has a substantially triangular shape when viewed from the left-right direction, and is joined to the lower end portion of the side surface 28 </ b> A of the side frame 28. The connecting portion 64D connects the upper end portion on the front side of the first fixing portion 64A and the lower end portion of the second fixing portion 64C. The narrowed portion 64E is formed at a connecting portion between the bulging portion 64B and the second fixing portion 64C and a connecting portion between the bulging portion 64B and the connecting portion 64D. The narrowed portion 64E is curved from the connecting portion with the bulging portion 64B toward the second fixing portion 64C and the connecting portion 64D that are arranged on the right side. As shown in FIG. 7, the rod 22 and the bridge portion 64 are joined to each other at a position on the left side of the position of the side frame 28.

  Incidentally, in the said Example, the vehicle seat 10 is an example of the vehicle seat. The seat frame 9 is an example of a vehicle seat frame. The rods 21 and 22 are examples of connecting members. The connection frame 27 and the side frames 28 and 29 are examples of a cushion frame. The first support part 41 and the second support part 42 of the leg part 24 are examples of a support frame. The front end surface 41A and the rear end surface 42A are examples of the outer surface. The right end surface 41C and the right end surface 42C are examples of inner surfaces.

As mentioned above, according to above-mentioned embodiment, there exist the following effects.
The bracket 35 includes a bridge portion 54 that is attached in a bridging manner between the first support portion 41 of the leg portion 24 and the side frame 28. The bracket 35 not only connects the first support portion 41 and the rod 21 by the first mounting portion 51 but also connects the first support portion 41 and the side frame 28 by the bridge portion 54. As a result, it is not necessary to separately provide a reinforcing body for maintaining the strength, and it is possible to maintain a desired strength sufficient to prevent the leg portion 24 from buckling at the time of a vehicle collision or the like while reducing the number of parts. It becomes.

  As shown in FIG. 5, the bracket 35 is attached so as to surround the first support part 41 by a first attachment part 51, a second attachment part 52, and a bridge part 54. Thereby, for example, when the side frame 28 is pulled rearward, the side frame 28 can be more firmly connected to the first support portion 41.

  Further, the bridge portion 54 is provided with a throttle portion 54E. The throttle portion 54E is provided so as to connect the left end surface 41B of the first support portion 41 and the side surface 28A of the side frame 28 (see FIG. 3). Here, for example, when another vehicle collides behind the vehicle, the first support portion 41 receives an external force that tilts forward. When the first support portion 41 is buckled forward, the first support portion 41 and the side frame 28 are displaced in a direction close to each other (a direction in which the inner angle decreases). In other words, the virtual plane V1 shown in FIG. 2 is a parallelogram inclined forward. On the other hand, the bridge portion 54 can increase the rigidity against the external force acting in the direction of reducing the internal angle by providing the throttle portion 54E in a curved shape connecting the first support portion 41 and the side frame 28. It becomes. Accordingly, the bridge portion 54 can effectively suppress the buckling of the first support portion 41 by providing the throttle portion 54E.

In addition, this invention is not limited to the said Example, It can implement in the various aspect which gave various change and improvement based on the knowledge of those skilled in the art.
For example, in the above-described embodiment, the two-seat vehicle seat 10 has been described as an example of the vehicle seat, but the present invention is not limited thereto. The vehicle seat on which the vehicle seat frame of the present application is mounted may be a seat for one person or a vehicle seat on which three or more people can sit. In addition, the vehicle seat is not limited to that mounted on the vehicle, and other vehicles such as a vehicle seat mounted on an airplane can be employed.
In the above embodiment, the vehicle seat 10 may be configured not to include the back frame 13 and the back pad 14.

In the above embodiment, the bracket 35 may be configured without the second mounting portion 52. Moreover, it is good also as a structure which fixes both the 1st attachment part 51 and the bridge | bridging part 54 to the left end surface 41B as a structure which has only the 1st attachment part 51 and the bridge | bridging part 54 in the bracket 35. That is, the bracket 35 may be provided only on the left side (outside) of the first support portion 41.
Further, in the above embodiment, the bracket 35 may be configured to include the bridge portion 54 on the right side (the inner side in the vehicle width direction) of the first support portion 41 and the side frame 28. The bracket 35 may be configured to include bridge portions 54 on both sides in the left-right direction with respect to the first support portion 41 and the side frame 28.
Further, the bridge portion 54 may have a configuration that does not include the aperture portion 54E, for example, a plate-like configuration that connects the left end surface 41B of the first support portion 41 and the side surface 28A of the side frame 28.
Further, the second attachment portion 52 may be configured to be fixed to both the first support portion 41 and the side frame 28. Thereby, the 1st support part 41 and the side frame 28 can be fixed more firmly. In this case, the second mounting portion 52 may be configured to include the throttle portion 54E. Thereby, the 2nd attaching part 52 can suppress the buckling of the 1st support part 41 effectively like the bridge | bridging part 54 by providing the aperture | diaphragm | squeeze part 54E.
Further, the bracket 35 may be configured not to be fixed to the rod 21.
Further, the left end 21A may be configured not to protrude to the left (outside) from a portion joined to the recess 28D of the side frame 28.

  Moreover, in the said embodiment, the leg part 24 is arrange | positioned in the state which made the 1st support part 41 and the 2nd support part 42 oppose in the front-back direction, and connects the front-end part and rear-end part of the side frame 28. Although it was a structure, it is not restricted to this. For example, the leg portion 24 may be disposed so that the first support portion 41 and the second support portion 42 face each other in the left-right direction, and the connection frame 27 and the front end portion of the side frame 28 may be connected to each other. In this case, the leg part 24 connects separate frames (the connecting frame 27 and the side frame 28). Moreover, the above-described virtual plane V1 is defined as a plane orthogonal to the front-rear direction. For example, the bracket 35 may be provided at a connection portion between the front end portion of the connection frame 27 and the leg portion 24. Even when the arrangement direction of the leg portions 24 is changed as described above, the bracket 35 is used to reduce the number of parts, while preventing the leg portions 24 from buckling at the time of a vehicle collision or the like. The strength can be maintained.

  In addition, the shape, number, material, and the like of each member in the above embodiment are examples, and can be changed as appropriate. For example, the leg portion 24 has a configuration in which the first support portion 41 and the second support portion 42 are connected by the bottom portion 43, but does not include the bottom portion 43 and separates the first support portion 41 and the second support portion 42. The configuration may be also possible. Moreover, although the leg part 24 was a hollow member, a solid rod member may be sufficient. Moreover, although each member, such as the side frame 28, was joined by welding, you may join by screwing, such as a volt | bolt.

  DESCRIPTION OF SYMBOLS 10 Vehicle seat (vehicle seat), 9 Seat frame (vehicle seat frame), 11 Cushion frame, 12 Cushion pad, 13 Back frame, 21, 22 Rod, 24 Leg part (support frame), 27 Connection frame (cushion) Frame), 28, 29 Side frame (cushion frame), 35, 36 Bracket, 41A Front end face (outward face), 42A Rear end face (outward face), 41C Right end face (inner face), 42C Right end face (inner face), 51, 61 1st attachment part, 52, 62 2nd attachment part, 54, 64 Bridge part, 54E, 64E Restriction part, V1 Virtual plane.

Claims (7)

A pair of support frames provided on the floor of the vehicle and supporting the vehicle seat;
A cushion frame for connecting the upper ends of the pair of support frames to each other and placing a cushion pad;
Provided in a connecting portion that connects at least one of the pair of support frames and the cushion frame, and in a virtual plane partitioned by the pair of support frames and the cushion frame, of the pair of support frames A vehicle seat frame comprising: a bracket that bridges and connects at least one of the cushion frame and the cushion frame. The support frame has an outer surface that intersects the virtual plane and faces outward;
The bracket is formed in a flat plate shape along the outer surface, and is fixed to the cushion frame by extending from the support frame to the cushion frame on the virtual surface, and a first attachment portion fixed to the outer surface. The vehicle seat frame according to claim 1, further comprising a bridge portion. The support frame has an inner surface that is connected to the outer surface and is disposed to face the virtual surface;
3. The vehicle seat according to claim 2, wherein the bracket includes a second mounting portion that extends from the first mounting portion and forms a flat plate shape along the inner side surface and is fixed to the inner side surface. flame.   The bridge part is formed in a substantially triangular shape having a connecting portion between the support frame and the cushion frame as a vertex and each of the support frame and the cushion frame having two sides. The vehicle seat frame according to claim 3.   The vehicle seat frame according to any one of claims 2 to 4, wherein the bridge portion has a throttle portion bent or curved along a line connecting the support frame and the cushion frame. . A pair of the cushion frames are provided,
A connecting member that connects the pair of cushion frames;
The vehicle seat frame according to any one of claims 1 to 5, wherein the bracket is fixed to the connection member at a connection portion between the support frame and the cushion frame. The connecting member extends from one of the pair of cushion frames toward the other, and extends outward with respect to the other cushion frame at the connecting portion.
The vehicle seat frame according to claim 6, wherein the bracket is fixed to an extended distal end portion of the connecting member.

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