JP5880323B2 - Manufacturing method of seat back frame - Google Patents

Description

The present invention relates to a method for manufacturing a seat back frame. More specifically, the present invention relates to a method for manufacturing a seat back frame that integrally includes a component frame that forms a skeleton of the seat back and extends in the seat width direction, and a support that is coupled to the component frame and supports a headrest stay.

  2. Description of the Related Art Conventionally, in a vehicle seat, as a configuration for mounting a headrest on an upper portion of a seatback, a configuration in which a headrest stay is inserted into a cylindrical support fixed to a seatback frame is known (Patent Document 1). . The support is provided in the height direction between the upper frame and the intermediate frame of the seat back, and the headrest stay is inserted into a hole formed in the upper frame so as to penetrate into the cylinder. The headrest stay is inserted and attached.

JP-A-11-216037

  However, in the above prior art, although the cylindrical support is firmly coupled to the seat back frame, it is necessary to form a hole communicating with the hole of the cylinder in the upper frame in order to open the upper end of the cylinder. Therefore, it takes a lot of work to process. The present invention was devised as a solution to the above-described problem, and the problem to be solved by the present invention is that a support for supporting the headrest stay can be easily and firmly integrally coupled to the seat back frame. There is in doing so.

In order to solve the above-described problems, the seat back frame manufacturing method of the present invention takes the following means.
1st invention is a manufacturing method of the seat back frame which has integrally the structure frame which extends in the seat width direction which comprises the frame of a seat back, and the support which is connected to the structure frame and supports a headrest stay. The frame consists of an insertion space that allows the support tool to be inserted in the height direction into the middle part of the seat longitudinal direction, and the insertion space is pushed and narrowed in the seat width direction so that its inner peripheral surface becomes the outer peripheral surface of the support tool. and crimping acceptable structure to be pressure-bonded to the sheet width direction, crimping acceptable structure by before and after the insertion space becomes a state destined et a on the outer peripheral surface from the seat front-rear side of the support by narrowed pushed in the sheet width direction A contact surface. Support, by the inner peripheral surface of the insertion space by crimping acceptable structure is pressed against the seat width direction to the outer peripheral surface of the support, as a state abutting surface is addressed et al from the seat front-rear side of the front and rear, structure It is configured to be integrally coupled to the frame.

According to the first invention, the support member is, the configuration frame, while being crimped sandwiched pressed from both sides in the sheet width direction, by placing et been from both sides of the seat front-rear direction surrounded on all sides state It will be in the state connected firmly as one. In this manner, the support can be easily and firmly integrally coupled to the seat back frame without performing welding or fastening.

  The second invention is the following configuration in the first invention described above. The component frame includes a plurality of divided frames divided in the sheet width direction, and a holding structure that holds the divided frames so that the divided frames are inserted in the sheet width direction so as not to come out in a direction perpendicular to the insertion direction. And a rail frame. The insertion space is formed as a space between any one of the plurality of divided frames adjacent to each other in the sheet width direction. The crimping allowable structure is a state where a plurality of divided frames are squeezed in the sheet width direction so as to press the support tool in the sheet width direction, and the split frames positioned on both ends of the support tool are inserted in the insertion direction together with the rail frame. Is configured such that a plurality of divided frames are held in a state of being crimped to a support by bending in a vertical direction.

  According to the second aspect of the invention, the divided frames on both ends that sandwich the support tool are bent together with the rail frame, whereby each divided frame is fixed in a state of being crimped to the support tool. In this way, the support tool can be simply and firmly integrally coupled to the seat back frame by a simple process of bending the component frame.

The third invention is the following configuration in the second invention described above. The front and rear contact surfaces are formed with recesses capable of receiving the support tool in the seat width direction in at least one of the plurality of divided frames sandwiching the support tool in the seat width direction. the inner peripheral surface is made of the configuration in a state destined et a respective outer surface in the seat front-rear side of the support.

According to the third aspect of the invention, by forming a recess in at least one of the plurality of divided frames sandwiching the support tool, the sheet is placed on the outer peripheral surface of the support tool by compressing the plurality of divided frames in the sheet width direction. it is possible to form the abutment surface of the longitudinal addressed et al is from the front and rear side.

  According to a fourth invention, in any one of the first to third inventions described above, the following configuration is adopted. On the outer peripheral surfaces on both sides in the sheet width direction of the support, recesses are formed that fit with the inner peripheral surfaces on both sides in the sheet width direction of the insertion space.

  According to the fourth aspect of the present invention, the depressions formed on the outer peripheral surfaces on both sides in the sheet width direction of the support are fitted with the respective inner peripheral surfaces of the insertion space by pushing and narrowing the insertion space in the sheet width direction. Match. With this fitting structure, the support can be positioned in the height direction with respect to the component frame, and can be firmly and integrally coupled in the height direction.

It is an external appearance perspective view of the vehicle seat to which the seat back frame of Example 1 was applied. It is a perspective view of a single seat back frame. It is a front view of a seat back frame. It is a side view of a seat back 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 back 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 back frame. FIG. 6 is an exploded perspective view of a seat back frame according to a second embodiment. It is a perspective view of a seat back frame.

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

  First, the configuration of the seat back frame 10 according to the first embodiment will be described with reference to FIGS. As shown in FIG. 1, the seat back frame 10 of the present embodiment is configured as a frame of a seat back 2 of a 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 square cylindrical holders in which two rod-like stays (headrest stays) protruding from the lower part are respectively 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) respectively mounted in 10C from the upper side, 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, the upper frame 10B corresponds to the “component frame” of the present invention, and each holder 10C corresponds to the “support” 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 first steel plate panel 11A, the second steel plate panel 11B, and the third steel plate panel 11C correspond to the “divided frames” of the present invention, respectively, and the edge frames 12 and 13 respectively correspond to “ Corresponds to "rail frame".

  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. Here, the gaps Sp1 and Sp2 correspond to the “insertion space” of the present invention, respectively.

  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). Here, when the holders 10C are pressed in the sheet width direction and enter the recesses 11A2, 11B2, 11B3, 11C2, the recesses 11A2, which are applied to the outer peripheral surface of the holders 10C from the front and rear sides of the sheet. The inner peripheral surfaces on the front and rear sides of 11B2, 11B3, and 11C2 correspond to the “front and rear contact surfaces” of the present invention, respectively.

  After the above assembly, as shown in FIG. 9, the respective portions (bending lines 10 </ b> R, 10 </ b> L) corresponding to both shoulder openings of the seat back 2 through which the first steel plate panel 11 </ b> A and the third steel plate panel 11 </ b> C are passed are When bending together with the edge side 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 11C Bending is performed so that force is applied in a direction in which the gaps Sp1 and Sp2 are narrowed by bending so that the gap Sp2 is not widened. 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 (compression bonding allowable structure).

  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.

  As described above, in the configuration of the seat back frame 10 according to the present embodiment, the upper frame 10B has the insertion spaces (gap Sp1, Sp2) in which the holders 10C can be inserted in the height direction in the intermediate portion in the seat front-rear direction. And a crimping permission structure (the steel plate panel 11 is a sheet) that pushes and narrows the insertion space (gap Sp1, Sp2) in the sheet width direction so that the inner circumferential surface thereof can be crimped to the outer circumferential surface of each holder 10C in the sheet width direction. The structure is divided into a plurality of parts in the width direction and these are pressed in the sheet width direction), and the insertion spaces (gap Sp1, Sp2) are pressed and narrowed in the sheet width direction by the pressure-bonding allowable structure. Front and rear contact surfaces that are applied to the outer peripheral surface of the holder 10C from the front and rear sides of the sheet (respective inner peripheral surfaces on the front and rear sides of the recesses 11A2, 11B2, 11B3, and 11C2) And, with a. Each holder 10C has an inner circumferential surface of the insertion space (gap Sp1, Sp2) that is crimped to the outer circumferential surface of each holder 10C in the sheet width direction by a pressure-bonding allowable structure. The inner peripheral surfaces on the front and rear sides of the recesses 11A2, 11B2, 11B3, and 11C2 are applied from the front and rear sides of the seat, and are integrally coupled to the upper frame 10B.

  With this configuration, each holder 10C is pressed and pressed against both sides of the upper frame 10B from both sides in the seat width direction, and is applied from both sides in the front-rear direction of the seat. It is in a state of being firmly and integrally coupled as an enclosed state. Thus, each holder 10C can be simply and firmly integrally coupled to the seat back frame 10 without performing welding or fastening.

  Specifically, the upper frame 10B described above includes a plurality of divided frames (first steel plate panel 11A, second steel plate panel 11B, and third steel plate panel 11C) divided in the sheet width direction, and these divided frames ( The first steel plate panel 11A, the second steel plate panel 11B, and the third steel plate panel 11C) are inserted in the sheet width direction and are held so as not to come out in the direction perpendicular to the insertion direction. And a rail frame (edge side frames 12, 13) having a holding structure. The above-described insertion spaces (gap Sp1, Sp2) are adjacent end portions in the sheet width direction between the respective divided frames (first steel plate panel 11A, second steel plate panel 11B, and third steel plate panel 11C). It is formed as a space between.

  In the crimping allowable structure, the divided frames (the first steel plate panel 11A, the second steel plate panel 11B, and the third steel plate panel 11C) are pressed in the sheet width direction so as to press the holders 10C in the sheet width direction. In this state, each of the divided frames (first steel plate panel 11A and third steel plate panel 11C) positioned at both ends sandwiching each holder 10C is perpendicular to the insertion direction together with the rail frame (edge side frames 12, 13). Each of the divided frames (the first steel plate panel 11A, the second steel plate panel 11B, and the third steel plate panel 11C) is held in a state where it is pressed against each holder 10C. Yes. Thus, each holder 10C can be simply and firmly integrally coupled to the seat back frame 10 by a simple process of bending the upper frame 10B.

  In addition, recesses 10C1 and 10C2 are formed on the outer peripheral surfaces on both sides in the sheet width direction of each holder 10C to be fitted to the inner peripheral surfaces on both sides in the sheet width direction of the insertion space (gap Sp1, Sp2). Due to such a configuration, the depressions 10C1 and 10C2 formed on both side surfaces of each holder 10C in the sheet width direction by pressing and narrowing the insertion space (gap Sp1, Sp2) in the sheet width direction, It fits with each inner peripheral surface of insertion space (gap Sp1, Sp2). Accordingly, each holder 10C can be positioned in the height direction with respect to the upper frame 10B, and can be firmly and integrally coupled in the height direction.

  Next, the configuration of the seat back frame 10 according to the second embodiment will be described with reference to FIGS. In the present embodiment, portions that have substantially the same configuration and operation as those of the seat back frame 10 described in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and different portions are described in detail. I will do it. In this embodiment, the steel plate panel 11 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. Here, each mounting hole 11D2 corresponds to the “insertion space” of the present invention. 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. Here, each slit 11D2a corresponds to the “crimpable structure” of the present invention. 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 each recess 10C1 and 10C2 formed in the peripheral portion of each holder 10C in the sheet width direction so that each holder 10C is firmly integrated. It will be in a state of being sandwiched between. Further, since the circumferential length of each mounting hole 11D2 is narrowed along with the deformation in which each slit 11D2a is pressed in the sheet width direction, the shape of each mounting hole 11D2 is slightly squeezed also in the sheet longitudinal direction. It is like that. 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). Here, when each holder 10C is pressed in the seat width direction in each mounting hole 11D2, each inner circumference on the front and rear sides of each mounting hole 11D2 is applied to the outer peripheral surface of each holder 10C from the front and rear sides of the sheet. Each of the surfaces corresponds to the “front and back contact surfaces” of the present invention.

  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 described above, the upper frame 10B has the insertion space (mounting hole 11D2) in which each holder 10C can be inserted in the height direction in the middle part in the front-rear direction of the seat, and each insertion space (mounting hole 11D2). A pressure-bonding allowable structure in which the inner circumferential surface is pressed and narrowed in the width direction to be crimped to the outer circumferential surface of each holder 10C in the sheet width direction (structure in which the mounting hole 11D2 can be squeezed by the slit 11D2a). And the insertion space (mounting hole 11D2) is pressed and narrowed in the sheet width direction by a pressure-bonding allowable structure (a structure in which the mounting hole 11D2 is squeezed by the slit 11D2a). Front and back contact surfaces (inner peripheral surfaces on the front and rear sides of each mounting hole 11D2) applied from the front and rear sides of the seat. Each holder 10C has a pressure-bonding allowable structure (a structure in which the mounting hole 11D2 is squeezed by the slit 11D2a) so that the inner peripheral surface of each insertion space (the mounting hole 11D2) is a sheet on the outer peripheral surface of each holder 10C. By crimping in the width direction, the front and rear contact surfaces (the inner peripheral surfaces on the front and rear sides of the mounting holes 11D2) are integrally coupled to the upper frame 10B in a state where they are applied from the front and rear sides of the seat. It is set as the structure.

  With this configuration, each holder 10C is pressed and pressed against both sides of the upper frame 10B from both sides in the seat width direction, and is applied from both sides in the front-rear direction of the seat. It is in a state of being firmly and integrally coupled as an enclosed state. Thus, each holder 10C can be simply and firmly integrally coupled to the seat back frame 10 without performing welding or fastening.

  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, in each of the above-described embodiments, the upper frame 10B forming the skeleton of the upper portion of the seat back 2 is illustrated as the “configuration frame to which the support supporting the headrest stay is coupled” of the present invention. May be a frame arranged below the upper frame of the seat back. Further, as the above-described “configuration frame”, an example is shown in which the steel plate panel 11 and edge side frames 12 and 13 (rail frame) made of an extruded material of aluminum alloy are combined, but the “configuration frame” is configured by one member. It may be done. In addition, the “configuration frame” can be applied by selecting various metal materials, including the case of a combination of two or more members. Specifically, metal materials such as aluminum alloys, magnesium alloys, and steel materials are typically cited, and these press materials, extruded materials, forged materials, etc. formed by various processing methods, or combinations thereof Can be applied.

  In each of the above-described embodiments, the rectangular cylindrical holder 10C is exemplified as the “support” of the present invention. However, the “support” is formed of a cylindrical shape or another polygonal cylindrical shape. There may be. In each of the above embodiments, the holder 10C functions as a bracket to which a cylindrical support member for attaching and holding a headrest stay is additionally attached as a “support” of the present invention. However, since the present invention has a configuration that can be coupled by crimping that does not require welding or fastening, the support member may be directly coupled to the “configuration frame” directly as a “support”. Good.

  In addition, as the shape of the “insertion space”, the inner peripheral surface of the insertion space is formed as a surface (inclined surface or curved surface) that is inclined obliquely forward and backward with respect to the sheet width direction. By pressing and narrowing in the width direction, the inner peripheral surface of the insertion space may be pressed against the inner peripheral surface of the support in both the sheet width direction and the sheet front-rear direction. In addition, a protrusion shape that bulges in a convex shape is formed on the inner peripheral surface of the insertion space, and by pressing and narrowing the insertion space in the sheet width direction, the protrusion shape is strongly pressed against the inner peripheral surface of the support, The sheet may be strongly pressed in the sheet width direction. Further, the “front and back contact surfaces” of the present invention include “a plurality of divided frames” obtained by dividing the “configuration frame” in the sheet width direction, and these “divided frames” inserted in the sheet width direction. What is configured to have a “rail frame” having a holding structure that holds it so as not to come out in a direction perpendicular to the insertion direction may be configured by a rail frame.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat back 3 Seat cushion 4 Headrest 10 Seat back frame 10A Side frame 10B Upper frame (configuration frame)
10C holder (support)
10C1 hollow 10C2 hollow 10R bending line 10L bending line 11 steel plate panel 11A first steel plate panel (divided frame)
11A1 Flange 11A2 Recess 11A3 Fitting hole 11A4 Shaft hole 11B Second steel plate panel (divided frame)
11B1 Flange part 11B2 Concave part 11B3 Concave part 11C 3rd steel plate panel (split frame)
11C1 Flange part 11C2 Recess 11C3 Mating hole 11C4 Shaft hole 11D1 Flange part 11D2 Mounting hole (insertion space)
11D2a Slit (crimpable structure)
11D3 Fitting hole 11D4 Shaft hole 12 Edge side frame (rail frame)
12A Rail groove 13 Edge frame (rail frame)
13A Rail groove Sp1 clearance (insertion space)
Sp2 gap (insertion space)

Claims (4)

A manufacturing method of a seat back frame integrally including a component frame that forms a skeleton of the seat back and that extends in the seat width direction, and a support that is coupled to the component frame and supports a headrest stay,
The configuration frame is:
An insertion space for allowing the support to be inserted in the height direction into an intermediate portion in the seat front-rear direction;
A crimping allowable structure that pushes and narrows the insertion space in the sheet width direction so that the inner circumferential surface thereof can be crimped to the outer circumferential surface of the support in the sheet width direction;
Has the insertion space by piezoelectric deposition acceptable structure and abutment surface before and after the state addressed et a on the outer peripheral surface from the seat front-rear side of the support by narrowed pushed in the sheet width direction, and
The support, by the inner peripheral surface of the insertion space by the compression tolerance structure is pressed against the seat width direction to the outer circumferential surface of the support, the abutment surface of the front and rear said that Re addressed et al from the seat front-rear side The seat back frame manufacturing method according to claim 1, wherein the seat back frame is integrally coupled to the component frame as a state. It is a manufacturing method of the seat back frame according to claim 1,
The component frame holds a plurality of divided frames divided in the sheet width direction, and the plurality of divided frames are inserted in the sheet width direction so as not to come out in a direction perpendicular to the insertion direction. A rail frame having a structure, and the insertion space is formed as a space between any one of the plurality of divided frames adjacent to each other in the sheet width direction, and the crimping is performed. The permissible structure may be configured such that the divided frames on both sides of the support tool are pressed together with the rail frame in a state where the plurality of divided frames are pressed in the seat width direction so as to press the support tool in the seat width direction. The plurality of divided frames are held in a state of being crimped to the support by bending in a direction perpendicular to the insertion direction. Method of manufacturing-back frame. It is a manufacturing method of the seat back frame according to claim 2,
The front and rear contact surfaces are formed with a recess capable of receiving the support tool in the sheet width direction in at least one of the plurality of divided frames sandwiching the support tool in the sheet width direction. method of manufacturing a seat back frame, characterized in that each inner peripheral surface of the front and rear side is made of the configuration in a state were respectively addressed et al on the outer peripheral surface from the seat front-rear side of the support. A method for manufacturing a seat back frame according to any one of claims 1 to 3,
The manufacturing method of the seat back frame characterized by forming the hollow which fits the internal peripheral surface of the both sides of the sheet | seat width direction of the said insertion space in the outer peripheral surface of the both sides of the sheet | seat width direction of the said support.

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