JP2014019202A - Seat frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a weight and also increase strength of a seat frame.SOLUTION: A seat back frame 10 (a seat frame) includes a pair of right and left side frames 10A extending in a seat height direction, and an upper frame 10B which is bent from the respective side frames 10A and extending in a seat width direction. Each of the side frames 10A is structured of a steel plate panel 11 extending in the seat height direction, and respective edge side frames 12, 13 inserted in and assembled on the steel plate panel 11. By bending the upper frame 10B from the respective side frames 10A, the respective edge side frames 12, 13 are bent in a direction vertical to an insertion direction in the steel plate panel 11 together with the steel plate panel 11, and the steel plate panel 11 and the respective edge side frames 12, 13 are formed in a mutually and integrally crimped and joined state.

Description

  The present invention relates to a seat frame. Specifically, the present invention relates to a seat frame having a configuration frame extending in a specific direction and a bending frame extending from the configuration frame in a direction perpendicular to the specific direction.

  2. Description of the Related Art Conventionally, as a frame structure of a seat back of a vehicle seat, one in which one of a pair of left and right side frames is formed of an aluminum alloy extruded material for weight reduction is known (Patent Document 1). The one side frame is a frame on the side where the seat belt device is attached to the seat back and the belt webbing is pulled out from the shoulder, and has a closed cross-sectional shape so that it can withstand a heavy load when a collision occurs. Thus, it is configured to achieve both weight reduction and strength ensuring. The remaining upper frame and the other side frame are formed of a press-formed product of a steel pipe material or a steel plate material, and are integrally connected so as to be connected to the side frame made of the extruded material. ing.

JP 2011-143816 A

  However, in the above-described conventional technology, the seat frame has a simple structure in which the extruded material of the aluminum alloy and the press-formed product of the steel material are simply connected in the extending direction of the seat frame. Appropriate balance is desired. The present invention was created to solve the above-described problems, and the problem to be solved by the present invention is to achieve both weight reduction and strength enhancement of the seat frame.

In order to solve the above problems, the seat frame of the present invention takes the following means.
A first invention is a seat frame having a component frame extending in a specific direction and a bent frame extending by being bent from the component frame in a direction perpendicular to the specific direction. The component frame includes a first frame member that extends in a specific direction and a second frame member that is inserted into the first frame member and assembled. By bending the bending frame from the component frame, the second frame member is bent together with the first frame member in a direction perpendicular to the insertion direction to the first frame member, so that both frame members are integrated with each other. It is formed as a state of being bonded by pressure bonding.

  According to the first aspect of the invention, the first frame member and the second frame member are inserted into each other and assembled, and are bent in a direction perpendicular to the insertion direction by bending the bending frame. In such a manner, they are firmly bonded and bonded together so as not to come out. Therefore, it can be assembled in a state where both are simply integrated without welding or fastening, and a combination of dissimilar materials that are difficult to weld to achieve both weight reduction and ensuring structural strength optimally. Can be obtained.

  The second invention is the following configuration in the first invention described above. Between the first frame member and the second frame member, one can be inserted from either side in a specific direction with respect to the other, and both are placed in a direction perpendicular to the specific direction by insertion. A rail fitting structure is provided so that the rail is held so as not to come off. By the process of bending the bending frame, the rail fitting structure is bent, and both are brought into a state where they are integrally crimped and joined together so that they cannot be pulled out from each other.

  According to the second aspect of the invention, by setting the insertion direction of both frame members to the direction in which the constituent frames extend, both can be fitted deeply into each other, and both can be more firmly coupled. At the same time, the structural strength of the component frame itself can be effectively increased.

  The third invention is the following configuration in the first or second invention described above. The seat frame is configured as a seat back frame, and the component frame is configured as a side frame of the seat back. The side frame has a steel plate panel extending in the seat height direction serving as a first frame member at the center in the seat front-rear direction, and a second frame member at each edge of the front and rear sides of the steel plate panel. The edge side frames made of extruded aluminum alloy are assembled.

  According to the third aspect of the present invention, the side frame of the seat back is configured by combining the steel frame panel having a high specific strength and the edge side frame made of the extruded material of the lightweight aluminum alloy as described above. It can be set as the structure which made weight reduction and ensuring of structural strength optimally compatible. That is, the steel plate panel having a high specific strength arranged in the center in the longitudinal direction of the seat can secure the connection strength with the reclining device that connects the side frame to the other frame so as to be reclining. Moreover, the closed cross-sectional shape (or solid shape) strong against a lateral load, a bending, and a twist can be comprised lightweight by each edge side frame which consists of an extrusion material of an aluminum alloy.

It is an external appearance perspective view of the vehicle seat to which the seat frame of Example 1 was applied. It is a perspective view of a seat frame simple substance. It is a front view of a seat frame. It is a side view of a seat frame. It is the VV sectional view taken on the line of FIG. FIG. 6 is a sectional view taken along line VI-VI in FIG. 2. It is a disassembled perspective view before the assembly | attachment of a seat frame. It is the perspective view which showed the state which assembled | attached each edge side frame to the steel plate panel. It is the perspective view which showed the state which bent the seat frame. FIG. 6 is an exploded perspective view of a seat frame according to a second embodiment. It is a perspective view of a seat frame.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing.

  First, the configuration of the seat frame according to the first embodiment will be described with reference to FIGS. As shown in FIG. 1, the “seat frame” of the present embodiment is configured as a seat back frame 10 that forms a framework of the seat back 2 of the vehicle seat 1 configured as a passenger seat of an automobile. Here, the vehicle seat 1 includes a seat back 2 that serves as a backrest for a seated occupant, a seat cushion 3 that serves as a seating portion, and a headrest 4 that serves as a headrest portion.

  The seat back 2 has a disc-shaped reclining device (not shown) in which the lower end portions on both the left and right sides function as a rotation shaft device capable of stopping rotation with respect to the rear end portions of the left and right sides of the seat cushion 3. Connected to each other. Thus, the seat back 2 is connected to the seat cushion 3 so that the backrest angle can be adjusted. The seat cushion 3 is connected to a vehicle floor via a pair of left and right slide devices (not shown). Thereby, the seat cushion 3 is in a state provided so as to be able to adjust the position in the front-rear direction with respect to the floor. The basic structure of the reclining device and slide device (not shown) is the same as that disclosed in the literatures such as Japanese Patent Application Laid-Open No. 2011-116303 and Japanese Patent Application Laid-Open No. 2010-221935. Detailed description will be omitted.

  The headrest 4 is mounted on the upper portion of the seat back 2. Specifically, the headrest 4 has two rod-like stays protruding from the lower part thereof in two rectangular tube-like holders 10C each fixed on an upper frame 10B of a seat back frame 10 described later. By being inserted and mounted in a cylindrical support member (not shown) that is mounted from above, it is mounted and fixed on the upper part of the seat back 2. The structure in which the stay (not shown) of the headrest 4 is inserted into each holder 10C fixed on the seatback frame 10 is the same as that disclosed in the literature such as Japanese Patent Application Laid-Open No. 2008-239075. Therefore, a specific description thereof will be omitted.

  Hereinafter, a specific configuration of the seat back frame 10 will be described with reference to FIGS. As shown in FIGS. 2 to 4, the seat back frame 10 includes a side frame 10 </ b> A that forms a skeleton on both the left and right sides of the seat back 2, an upper frame 10 </ b> B that forms a skeleton on the upper side of the seat back 2, and an upper frame 10 </ b> B. It is composed of a rectangular tube-shaped holder 10C provided at two positions on the left and right. Here, each side frame 10A corresponds to a “component frame” of the present invention, and the upper frame 10B corresponds to a “bending frame” of the present invention.

  As shown in FIGS. 7 to 9, the seat back frame 10 includes a long steel plate panel 11 and two long edge side frames 12 and 13 made of an aluminum alloy extruded material. Each part (bending lines 10R, 10L: see FIG. 8) corresponding to both shoulders of the seat back 2 is bent and is joined to each other so as to be firmly joined together. It has been made. Specifically, as shown in FIG. 7, the steel plate panel 11 is constituted by three panel members of a first steel plate panel 11A, a second steel plate panel 11B, and a third steel plate panel 11C. Has been. As shown in FIG. 9, each of the first steel plate panel 11A and the third steel plate panel 11C has a frame extending over the entire side frame 10A of the seat back frame 10 and a part of each side of the upper frame 10B. It is configured to have a length, and is configured to form a frame structure from each side frame 10A to a part of each side of the upper frame 10B by bending the middle portion (bending lines 10R, 10L). . Further, the second steel plate panel 11B is positioned between the first steel plate panel 11A and the third steel plate panel 11C extending to a part of each side of the upper frame 10B, and the frame of the upper frame 10B. It is configured as a structure. Here, the steel plate panel 11 (the first steel plate panel 11A and the third steel plate panel 11C) corresponds to the “first frame member” of the present invention, and each of the edge side frames 12 and 13 corresponds to the “second frame” of the present invention. It corresponds to “frame member”.

  As shown in FIG. 7, the first steel plate panel 11A, the second steel plate panel 11B, and the third steel plate panel 11C described above are arranged in the longitudinal direction in the arrangement order described above, The plate width in the short direction is formed so as to gradually and gradually spread from the center of the second steel plate panel 11B, which is the center of these arrays, toward both outer sides of the array. Specifically, in the state in which the first steel plate panel 11A, the second steel plate panel 11B, and the third steel plate panel 11C are arranged as described above, the outer peripheral surfaces on both sides in the lateral direction are arranged in the direction of the arrangement. It is formed in a curved shape so as to warp toward the opposite sides from the center to the outer sides. Accordingly, as shown in FIG. 9, when the first steel plate panel 11A and the third steel plate panel 11C are bent and formed as the side frames 10A of the seat back frame 10, these sheets are formed. The plate width in the front-rear direction is formed so as to gradually increase toward the lower side, and the structural strength toward the lower side where the load of the backrest load received from the back of the seated occupant increases. It is in a state of being formed into an optimal shape that will be enhanced.

  Moreover, as shown in FIG. 7, each edge side frame 12 and 13 straddles the 1st steel plate panel 11A, the 2nd steel plate panel 11B, and the 3rd steel plate panel 11C which were mentioned above, and each curved outer periphery. By being sequentially inserted in the longitudinal direction along the portion, they are engaged with each other and assembled in a state of being held so as not to come out in a direction perpendicular to the insertion direction. When the assembly structure is specifically described, the curved outer peripheral portions of the first steel plate panel 11A, the second steel plate panel 11B, and the third steel plate panel 11C described above are bent into an L-shaped cross section. The flange portions 11A1, 11B1, and 11C1 are continuously formed along the curved shape of each outer peripheral portion. These flange portions 11A1, 11B1, and 11C1 are formed in cross-sectional shapes having the same size.

  On the other hand, each edge side frame 12 and 13 is along the curved shape of each outer peripheral part of the 1st steel plate panel 11A, the 2nd steel plate panel 11B, and the 3rd steel plate panel 11C which were mentioned above by extrusion molding of aluminum alloy. It is curved. As shown in FIG. 5, each of the edge side frames 12 and 13 has a cross-sectional shape formed on the first steel plate panel 11A, the second steel plate panel 11B, and the third steel plate panel 11C described above. Rail grooves 12A and 13A having L-shaped cross-sections that can be inserted through the flange portions 11A1, 11B1, and 11C1 in the longitudinal direction are formed in a rectangular solid cross-sectional shape that is long in the seat width direction. Yes.

  Therefore, the edge side frames 12 and 13 are connected to the flanges 11A1 of the first steel plate panel 11A, the flanges 11B1 of the second steel plate panel 11B, and the third steel plate panel 11C in the rail grooves 12A and 13A. By inserting and assembling the flange portions 11C1 in order, the rail grooves 12A, 13A and the flange portions 11A1, 11B1, 11C1 are fitted, and the edge frames 12, 13 are connected to the first steel plate panel 11A. The second steel plate panel 11B and the third steel plate panel 11C are assembled in a state of being held so as not to come out in a direction perpendicular to the insertion direction (see FIG. 8). Then, after the above assembly, as shown in FIG. 9, the portions (bending lines 10R, 10L) corresponding to both shoulder openings of the seat back 2 through which the first steel plate panel 11A and the third steel plate panel 11C are passed are shown. The seat back frame 10 bent into an inverted U-shape is formed in a continuous shape by bending the edge frames 12 and 13 together with the edge frames 12 and 13 in a direction perpendicular to the arrangement direction of the edge frames 12 and 13. It becomes a state.

  Specifically, by the above bending, the fitting portions between the rail grooves 12A, 13A and the flange portions 11A1, 11B1, 11C1 are bent, and these are integrally crimped and joined together so that they cannot be pulled out. It becomes. Thereby, without performing welding and fastening, both can be assembled in a simple and firm integrated state, and different materials that are difficult to weld (steel and aluminum alloy extruded materials) are combined. It is possible to obtain a configuration that can achieve both weight reduction and ensuring structural strength optimally.

  Here, as shown in FIGS. 7-8, when each edge side frame 12 and 13 is inserted and assembled | attached to the said steel plate panel 11, it is between 1st steel plate panel 11A and 2nd steel plate panel 11B. In the sheet width direction by inserting the above-mentioned square cylindrical holder 10C into the position (gap Sp1) and the position (gap Sp2) between the second steel plate panel 11B and the third steel plate panel 11C, respectively. It is designed to be assembled in a sandwiched state. A specific assembly structure will be described. The edge of the first steel plate panel 11A and the edge of the second steel plate panel 11B in which one holder 10C is sandwiched are part of the peripheral edge of the holder 10C. Recesses 11A2 and 11B2 that are recessed in a rectangular shape that can be fitted are formed, and also on the edge of the second steel plate panel 11B and the edge of the third steel plate panel 11C in which the other holder 10C is sandwiched, respectively. In addition, concave portions 11B3 and 11C2 that are recessed in a rectangular shape into which a part of the peripheral edge of the holder 10C can be fitted are formed. The front-rear widths of the recesses 11A2, 11B2 and the recesses 11B3, 11C2 are set to be approximately the same as the outer dimensions (front-rear widths) of the holders 10C in the front-rear direction.

  The one holder 10C has a recess 10C1 that fits in the sheet width direction into the peripheral edge of the recess 11A2 when fitted in the recess 11A2 of the first steel plate panel 11A, and a second steel plate. When fitted into the recess 11B2 of the panel 11B, recesses 10C2 that fit into the peripheral edge of the recess 11B2 in the sheet width direction are formed by being cut in the circumferential direction on both side surfaces in the sheet width direction, respectively. ing. The other holder 10C also has a recess 10C2 that fits in the sheet width direction into the peripheral edge of the recess 11B3 when fitted into the recess 11B3 of the second steel plate panel 11B, and a third steel plate panel. A recess 10C1 that fits in the sheet width direction at the peripheral edge in the recess 11C2 when fitted into the recess 11C2 of 11C is formed by being cut in the circumferential direction on both side surfaces in the sheet width direction, respectively. Yes.

  Accordingly, each of the holders 10C described above is inserted into each of the above-described gaps Sp1, Sp2, and between the recess 11A2 of the first steel plate panel 11A and the recess 11B2 of the second steel plate panel 11B, and the second By being sandwiched and assembled in the sheet width direction between the concave portion 11B3 of the steel plate panel 11B and the concave portion 11C2 of the third steel plate panel 11C, depending on the shape of the concave portions 11A2, 11B2 and the concave portions 11B3, 11C2 Each is sandwiched and positioned from the front, rear, left, and right directions, and is engaged by the fitting structure of the recesses 10C1 and 10C2 so as not to be displaced in the height direction (so as not to fall). (See FIG. 6).

  Then, after the above assembly, as shown in FIG. 9, the portions (bending lines 10R, 10L) corresponding to both shoulder openings of the seat back 2 through which the first steel plate panel 11A and the third steel plate panel 11C are passed are shown. When bending together with the respective edge frames 12 and 13, the gap Sp1 between the first steel plate panel 11A and the second steel plate panel 11B sandwiching each holder 10C and the second steel plate panel 11B and the third steel plate panel Bending is performed so that a force in a direction in which the gaps Sp1 and Sp2 are narrowed by bending is applied so that the gap Sp2 with the 11C does not widen. Thereby, each holder 10C is in a state of being strongly fitted between the first steel plate panel 11A and the second steel plate panel 11B or between the second steel plate panel 11B and the third steel plate panel 11C. Then, it is in a state of being firmly and integrally coupled to these (see FIG. 6).

  The seat back frame 10 in which the components are integrally assembled as described above, the first steel plate panel 11A and the third steel plate 11A having a high specific strength with the surface facing in the seat width direction, constituting each side frame 10A. Each lower end portion of the steel plate panel 11C is set as a connecting portion to which the above-described disk-shaped reclining device (not shown) is connected to the outer side surface thereof. For this purpose, a plurality of fitting holes 11A3 and 11C3 for coupling with the reclining device (not shown) are formed in the plate surface portion on the lower end side of the first steel plate panel 11A and the plate surface portion on the lower end side of the third steel plate panel 11C. In addition, shaft holes 11A4 and 11C4 through which operation shafts (not shown) for performing the unlocking operation of the reclining device are respectively formed are formed so as to penetrate in the axial direction.

  Thus, in the configuration of the seat back frame 10 (seat frame) of the present embodiment, each side frame 10A (configuration frame) that extends in the seat height direction, and the upper that is bent and extends from each side frame 10A in the seat width direction. In the configuration having the frame 10B (bending frame), each side frame 10A is inserted into the steel plate panel 11 (the first steel plate panel 11A and the third steel plate panel 11C) extending in the seat height direction, and the steel plate panel 11. Each of the edge side frames 12 and 13 is assembled. By processing the side frames 10A to be bent from the upper frame 10B, the edge side frames 12 and 13 are bent together with the steel plate panel 11 in a direction (sheet height direction) perpendicular to the insertion direction to the steel plate panel 11, and each edge side The frames 12 and 13 are formed as a state in which the steel plate panel 11 (the first steel plate panel 11A and the third steel plate panel 11C) is bonded and bonded together. Thus, the steel plate panel 11 and the edge frames 12 and 13 are inserted and assembled with each other, and are bent in a direction perpendicular to the insertion direction by bending the side frames 10A so that they do not come out from each other. Are firmly and integrally bonded to each other. Therefore, it can be assembled in a state where both are simply integrated without welding or fastening, and by combining dissimilar materials such as a combination of a steel plate material and an aluminum alloy that are difficult to weld, weight reduction and structure It is possible to obtain a configuration capable of optimally achieving both strength ensuring.

  Specifically, between the steel plate panel 11 and each of the edge side frames 12 and 13, one can be inserted from either side of the longitudinal direction with respect to the other, and both are perpendicular to the longitudinal direction by insertion. A rail fitting structure (fitting structure of rail grooves 12A, 13A and flange portions 11A1, 11B1, 11C1) that is held so as not to come off in the direction is provided, and each side frame from the upper frame 10B is provided. By the process in which 10A is bent, the fitting structure of the rail is bent, and both are brought into a state in which they are integrally crimped and coupled so that they cannot be pulled out from each other. Thus, by setting the assembling direction by inserting the steel plate panel 11 and each of the edge side frames 12 and 13 in the longitudinal direction in which both frame shapes extend, both can be fitted deeply into each other, and both can be made stronger. And the structural strength of the seat back frame 10 itself can be effectively increased.

  Further, each side frame 10A is provided with a high specific strength steel plate panel 11 extending in the seat height direction at the center portion in the seat front-rear direction. Edge side frames 12 and 13 made of extruded material are assembled. In this way, each side frame 10A of the seat back 2 is configured by combining the steel plate panel 11 having a high specific strength and the edge side frames 12 and 13 made of a light aluminum alloy extruded material as described above. It can be set as the structure which made weight reduction of the flame | frame 10A and ensuring of structural strength optimally compatible. That is, the high strength steel plate panel 11 arranged in the center in the front-rear direction of the seat secures the connection strength with the reclining device (not shown) that connects the side frames 10A to the frame of the seat cushion 3 so as to be reclining. be able to. Moreover, the closed cross-sectional shape (solid shape in a present Example) strong against a lateral load, a bending, and a twist can be comprised lightweight by each edge side frame 12 and 13 which consists of an extrusion material of an aluminum alloy.

  Next, the configuration of the seat frame (seat back frame 10) according to the second embodiment will be described with reference to FIGS. In the present embodiment, portions having substantially the same configuration and operation as those of the seat frame (seat back frame 10) shown in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and different portions are provided. Will be described in detail. In the present embodiment, the steel plate panel 11 corresponding to the “first frame member” of the present invention is constituted by a single long panel material. The steel plate panel 11 is formed in a curved shape so that the outer peripheral surfaces on both sides in the short side direction are warped toward the opposite sides from the center in the longitudinal direction toward both outer sides. Thereby, when both the side parts of the steel plate panel 11 are bent and formed as the side frames 10A of the seat back frame 10, the sheet width in the front-rear direction of the seat gradually increases toward the lower side. It is formed so that it will have a shape, and it is in a state where it is formed in an optimal shape in which its structural strength is increased toward the lower side where the backrest load received from the back of the seated occupant increases .

  Each of the edge side frames 12 and 13 (an extruded material of aluminum alloy) is formed by being bent into a curved shape along the shape of each outer peripheral surface in the short direction of the steel plate panel 11. The configuration of these edge side frames 12 and 13 is the same as the configuration shown in the first embodiment, and the rail grooves 12A and 13A formed inside each are formed on the outer peripheral portions on both sides in the short direction of the steel plate panel 11. By being inserted and assembled into each flange portion 11D1 that is bent into an L shape, the steel plate panel 11 is assembled in a state of being held so as not to come off in a direction perpendicular to the insertion direction. It is like that. After the edge frames 12 and 13 are inserted and assembled on both side portions of the steel plate panel 11, as shown in FIG. 11, the portions corresponding to the shoulder openings of these seat backs 2 (bending lines 10R and 10L) are bent. Thus, the seat back frame 10 bent into an inverted U shape is formed in a single shape.

  Specifically, by the above bending, the fitting portions between the rail grooves 12A and 13A of the respective edge frames 12 and 13 and the respective flange portions 11D1 of the steel plate panel 11 are bent, and these are integrally crimped together so that they cannot be pulled out. Will be combined. As a result, both can be assembled in a simple and strong integrated state without welding or fastening, and the weight can be reduced by combining dissimilar materials that are difficult to weld (extruded materials of steel and aluminum alloy). And ensuring the structural strength can be optimally achieved.

  Here, square hole-shaped mounting holes 11D2 into which the respective holders 10C can be fitted and mounted are formed at two positions in the center of the steel plate panel 11 in the longitudinal direction. These mounting holes 11D2 have a shape slightly larger than the outer diameter of each holder 10C, and each holder 10C can be easily inserted and mounted. Each mounting hole 11D2 is formed with a slit 11D2a that is tapered from the rear edge to the rear side. Each mounting hole 11D2 sets each holder 10C inside thereof, and bends both side portions (bending lines 10R, 10L) of the steel plate panel 11 as each side frame 10A, so that each slit 11D2a has a sheet width. The peripheral portion of each mounting hole 11D2 is firmly fitted in the recesses 10C1 and 10C2 formed in the peripheral portion of each holder 10C in the sheet width direction, so that each holder 10C is firmly sandwiched. It becomes a state. Accordingly, each holder 10C is positioned between the steel plate panel 11 from the front, rear, left, and right directions, and is displaced in the height direction with respect to the steel plate panel 11 by the fitting structure of the recesses 10C1 and 10C2. It is made to be in an engaged state so as not to fall (so as not to fall).

  In the seat back frame 10 formed by bending, the lower end portions of the steel panels 11 having high specific strength with the surfaces facing in the seat width direction constituting the side frames 10A are arranged on the outer surfaces of the discs (not shown). It is set as a connection part to which a reclining device of a shape is connected. For this purpose, a plurality of fitting holes 11D3 for coupling to the reclining device (not shown) and an operation shaft for performing the unlocking operation of the reclining device (not shown) are formed on the plate surface portion on each lower end side of the steel plate panel 11. ) Is formed so as to penetrate in the axial direction.

  As mentioned above, although embodiment of this invention was described using two Examples, this invention can be implemented with various forms other than the said Example. For example, the “seat frame” of the present invention is applied in various configurations having a “configuration frame” extending in a specific direction and a “bending frame” extending from the configuration frame in a direction perpendicular to the specific direction. In addition to the application as the seat back frame 10 as shown in the above embodiments, the invention can also be applied as a frame of another seat structure portion such as a seat cushion. It should be noted that the “seat frame” of the present invention is substantially effective even when the “configuration frame” extending in a specific direction and the “bending frame” extended by bending from the configuration frame in a direction perpendicular to the specific direction are interchanged. Therefore, it does not matter whether the member on one side to be bent is regarded as a “configuration frame” or a “bending frame”.

  In each of the above embodiments, the “first frame member” of the present invention is the steel plate panel 11 and the “second frame member” is the edge frames 12 and 13 made of an extruded material of an aluminum alloy. However, each frame member may be made of the same kind of metal material, or may be made of a combination of different kinds of metal materials. Specific examples of metal materials include metal materials such as aluminum alloys, magnesium alloys, and steel materials, and those formed by various processing methods such as press materials, extruded materials, and forged materials are applied. can do. In addition, these shapes may be configured by combining any shapes, and various shapes formed according to the purpose of use, regardless of closed cross-sectional shape / open cross-sectional shape. Frames having cross-sectional shapes can be combined.

  Moreover, in each said Example, the outer peripheral surface of the both sides of the transversal direction of the steel plate panel 11 (1st frame member) is formed in the curved shape so that it may warp to the mutually opposing side, Each inserted by these The edge side frames 12 and 13 (second frame members) are also illustrated as being formed in a curved shape along the curved shape. However, these steel plate panels (first frame members) and each edge side frame (second frame member) may be formed in a straight shape, and the structural strength of each side frame (configuration frame) may be increased. The outer peripheral surfaces on both sides in the short direction of the steel plate panel (first frame member) and each edge side frame (second frame member) were assembled in order to make the shape to be raised toward the lower side. It may have a shape that extends obliquely and straight so that the overall plate width changes linearly. Further, the outer peripheral surfaces on the both sides in the short direction of the steel plate panel (first frame member) and the respective edge side frames (the respective frame) so that each side frame (configuration frame) of the seat back is curved in a bow shape on the rear side. The second frame member) may be curved in the same direction so as to be curved in a bow shape on the rear side. In addition, the side frame (configuration frame) of the seat back as described above has a shape in which the plate width is increased toward the lower side, or the seat back is bent in the rear side. Insertion between the steel plate panel (first frame member) and each edge side frame (second frame member) is performed straightly by changing the cross-sectional shape of the (second frame member). It may be what has become like this.

  Further, the assembly by inserting the “first frame member” and the “second frame member” may be a configuration in which they are assembled not by insertion in the longitudinal direction but by insertion in the short direction. However, in a configuration in which “a rail fitting structure that holds both sides so as not to come out in a direction perpendicular to the insertion direction” is provided between them, the short direction insertion is sufficient. It should be noted that the depth cannot be secured.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat back 3 Seat cushion 4 Headrest 10 Seat back frame (seat frame)
10A Side frame (component frame)
10B Upper frame (bending frame)
10C holder 10C1 dent 10C2 dent 10R bending line 10L bending line 11 steel plate panel (first frame member)
11A 1st steel plate panel (1st frame member)
11A1 Flange portion 11A2 Recess 11A3 Fitting hole 11A4 Shaft hole 11B Second steel plate panel 11B1 Flange 11B2 Recess 11B3 Recess 11C Third steel plate panel (first frame member)
11C1 Flange part 11C2 Recess 11C3 Fitting hole 11C4 Shaft hole 11D1 Flange part 11D2 Mounting hole 11D2a Slit 11D3 Fitting hole 11D4 Shaft hole 12 Edge side frame (second frame member)
12A Rail groove 13 Edge side frame (second frame member)
13A Rail groove Sp1 gap Sp2 gap

Claims (3)

A seat frame having a configuration frame extending in a specific direction and a bending frame extending by being bent from the configuration frame in a direction perpendicular to the specific direction;
The configuration frame is:
A first frame member extending in the specific direction, and a second frame member inserted into the first frame member and assembled.
The second frame member is bent together with the first frame member in a direction perpendicular to the insertion direction to the first frame member by the process of bending the bending frame from the component frame, and both the frames A seat frame, wherein the members are formed in a state in which the members are integrally bonded to each other. The seat frame according to claim 1,
Between the first frame member and the second frame member, one can be inserted from either side of the specific direction with respect to the other, and the both are mutually connected to the specific direction by the insertion. Is provided with a rail fitting structure in which the rail is held so as not to be pulled out in the vertical direction, and the bending structure of the rail is bent by the bending of the bending frame. A seat frame, wherein the seat frame is brought into a combined state by being crimped integrally so that it cannot be pulled out. The seat frame according to claim 1 or 2,
The seat frame is configured as a seat back frame, the component frame is configured as a side frame of the seat back, and the side frame has a seat height that serves as the first frame member in the center in the seat front-rear direction. A steel plate panel extending in the direction is set, and an edge side frame made of an extruded material of an aluminum alloy serving as the second frame member is assembled to each edge portion on the front and back sides of the sheet of the steel plate panel. Characteristic seat frame.

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