WO2015016351A1

WO2015016351A1 - Seat back frame, seat for vehicle, and method for manufacturing seat back frame

Info

Publication number: WO2015016351A1
Application number: PCT/JP2014/070361
Authority: WO
Inventors: 将也古田
Original assignee: テイ・エステック株式会社
Priority date: 2013-08-01
Filing date: 2014-08-01
Publication date: 2015-02-05

Abstract

Provided is a seat back frame in which a front frame piece and a rear frame piece can be easily fastened together uniformly and that can increase the efficiency of the work of joining the front frame piece and the rear frame piece. A back frame (F2) is provided with a rear frame piece (ra) on the rear side of a seat and a front frame piece (fa) that is connected to the front side of the rear frame piece (ra). The rear frame piece (ra) and the front frame piece (fa) have left and right rear side frames (rs) and front side frames (fs), respectively, which are disposed on the seat lateral sides, the top ends of which are mutually connected, and which extend in the front/rear direction of the seat. One of the left and right front side frames (fs) of the front frame piece (fa) is flexible with respect to the seat lateral direction. Both of the left and right rear side frames (rs) and front side frames (fs), with which the rear frame piece (ra) and the front frame piece (fa) are respectively provided, are overlaid with respect to the seat lateral direction and joined.

Description

Seat back frame, seat for vehicle and method for manufacturing seat back frame

The present invention relates to a seat back frame, a vehicle seat, and a method of manufacturing the seat back frame, and in particular, a seat back frame formed by combining frame pieces made of a resin material, and a vehicle seat provided with the seat back frame. , And a method of manufacturing a seat back frame.

BACKGROUND ART Conventionally, resin materials such as CFRP containing carbon fibers, not metal materials, have been adopted for the back frame of vehicle seats in order to reduce weight and the like of vehicle parts for the purpose of improving fuel consumption (for example, patent documents 1).
Here, in the vehicle seat described in Patent Document 1, the side frame is made of CFRP and a high tensile steel plate, and the lower panel base made of the high tensile steel plate and the side frame base portion are welded by welding. The configuration to be concluded is adopted. The reason why such a configuration is adopted is that, when bonding the lower panel to the side frame with only the adhesive, it takes a waiting time until the adhesive hardens, so welding is used instead of bonding with the adhesive. To improve productivity.

Further, as an example shown in FIGS. 21 and 22, the rear frame piece rx is formed of only the resin material without using the front frame piece fx and the metal material, and the front and rear sides thereof are adhered by the adhesive. There is also a method of constructing the back frame F4.

Here, FIG. 21 is a perspective view showing a conventional seat frame, and FIG. 22A is a view showing a rear side frame piece rx and a front side frame piece fx of the conventional back frame, taken along the line XXII-XXII in FIG. FIG. 22B is a view showing a state before joining of both in corresponding cross-sections, and FIG. 22B is a cross-sectional view taken along line XXII-XXII of FIG. 21 showing a state in which the rear frame piece rx and the front frame piece fx in the conventional back frame are joined. FIG.

The rear frame piece rx is an outer portion 23b extending vertically in the left and right of the seat width direction, and a lower frame portion 23a extending to the back of the seat and connecting lower end sides of the left and right outer portions 23b. , Is configured.
An adhesive 400 is applied to the front surface of the lower frame portion 23a, and an adhesive 410 is applied to the opposing inner side surfaces of the pair of outer portions 23b.

On the other hand, the front frame piece fx has a rear surface portion 22a linearly extending in the seat width direction and a pair of inner surfaces extending forward from both ends of the rear surface portion 22a at the lower portion which is the XXII-XXII cross sectional position of FIG. It comprises a portion 22b, a pair of front portions 22c extending outward in the sheet width direction from both sides of the pair of inner portions 22b, and a pair of outer portions 22d extending rearward from both ends of the front portion 22c. .

In particular, the distance between the outer surfaces of the pair of outer portions 22d of the front frame piece fx is designed to be substantially equal to or slightly smaller than the distance between the inner surfaces of the pair of outer portions 23b of the rear frame piece rx. .

In the rear frame piece rx and the front frame piece fx configured in this manner, the front surface of the lower frame portion 23a of the rear frame piece rx and the back surface of the rear surface portion 22a of the front frame piece fx are bonded by the adhesive 400. The inner side surface of the outer side portion 23b of the rear frame piece rx and the outer side surface of the outer side portion 22d of the front side frame piece fx are bonded together by the adhesive 410 to constitute the back frame F4.

JP, 2013-67240, A

As described above, in the seat back frame of the vehicle seat described in Patent Document 1, welding instead of bonding using an adhesive is adopted, and welding of members made of CFRP is difficult. For reasons such as that, a part of the back frame is configured to include a high tensile steel plate. For this reason, even if a part of the seat back frame is made of CFRP, the rigidity can be increased by the part including the high-tensile steel sheet, but the weight reduction effect is weakened. It was

On the other hand, in the case where the rear side frame piece rx and the front side frame piece fx made of only the resin material are superposed one on the other and joined by the adhesive 400, 410, when both are superposed one on the other, When the position in the sheet width direction is uneven, the rear end of the outer side portion 22d of the front side frame piece fx may be in sliding contact with the inner side surface of the outer side portion 23b of the rear side frame piece rx. Thus, when the rear end of the outer portion 22d of the front frame piece fx is in sliding contact with the inner side surface of the outer portion 23b of the rear frame piece rx, as shown in FIG. 22B, the adhesive applied to the inner side surface of the outer portion 23b. By extruding the agent 410, it was difficult to adhere both sides uniformly. For this reason, the joint strength in the part by which the adhesive agent 410 was extruded has fallen.

In such a case, the front frame piece fx and the rear side frame piece rx are spaced apart in the front-rear direction, and the adhesive 410 is again applied to the inner side surface of the outer side portion 23b. While the center position in the width direction has to be aligned with the center position of the rear frame piece rx, it is necessary to overlap the both, and the working efficiency is low.

Then, this invention is made in view of the said problem, The objective is to improve the efficiency of the operation | work which joins the front frame piece and back side frame piece which comprise a back frame.
Another object of the present invention is to increase the bonding strength between the front and rear frame pieces.
Another object of the present invention is to reduce the weight of the back frame.
Another object of the present invention is to increase the rigidity of the back frame.

According to the seat back frame according to the first aspect of the present invention, the subject is a seat back frame used for a vehicle seat, comprising: a rear frame piece on the seat rear side; and the rear frame piece And a front side frame piece connected to the front side, the rear side frame piece having left and right rear side frame parts disposed in the seat side and extending in the front-rear direction of the seat whose upper end sides are connected to each other, The front frame piece has left and right front side frame portions which are disposed in the seat side and whose upper end sides are connected to each other and extend in the sheet longitudinal direction, and the left and right front side frame portions or the left and right rear sides. One of the frame portions is flexible in the seat width direction, and the left and right front side frame portions and the left and right rear side frame portions are overlapped in the seat width direction. It is solved by being engaged.

In this manner, one of the front side frame portion or the rear side frame portion has flexibility in the sheet width direction, and one of the flexibility is deformed in the sheet width direction to bond the two together. The adhesive applied to the opposite surface in the sheet width direction of either the front side frame portion or the rear side frame portion is adhered without being pushed back to one side in the case of overlapping of the two. Can. For this reason, the front frame piece and the rear side frame piece can be adhered uniformly and easily, and the efficiency of the bonding operation of the front side frame piece and the rear side frame piece can be enhanced.

Furthermore, one of the front frame piece or the rear frame piece may be formed such that the lower end sides of the left and right side frame portions are separated in the seat width direction.
Thus, by forming the lower end sides of the left and right side frame portions in one of the front frame piece or the rear frame piece to be separated in the seat width direction, the left and right in one of the front frame piece or the rear frame piece The lower end side of the side frame portion can be displaced in the seat width direction, and the left and right side frame portions of the other of the front and rear frame pieces can be suitably overlapped, so that the front frame piece and the rear side It is possible to increase the efficiency of the joint work of the frame pieces.

Further, an occupant support member made of an elastic material and supporting an occupant is fixed to the other of the front frame piece or the rear frame piece by its elasticity, and one of the front frame piece or the rear frame piece Is preferably formed so as to avoid a fixed part with the passenger support member.
In this manner, one of the front and rear frame pieces is formed so as to avoid a fixed portion with the occupant support member, and thus the other of the front and rear frame pieces and the occupant support member In the fixing operation or the fixing operation between the front frame piece and the rear frame piece, interference between one of the front frame piece or the rear frame piece and the occupant support member can be avoided, and the front frame piece and the rear frame The efficiency of the piece joining operation can be increased.

Furthermore, the one of the front frame piece or the rear frame piece has an extending portion extending inward in the sheet width direction from the lower end side of both the left and right side frame portions, and the extending portion It is preferable that the extension extends to a length that does not reach the fixed portion of the occupant support member.
Thus, the extension portion extends to a length that does not reach the fixed portion of the occupant support member, thereby securing the other of the front and rear frame pieces and the occupant support member, or the front frame piece In the fixing operation between the rear frame piece and the rear frame piece, interference between one of the front frame piece or the rear frame piece and the occupant support member can be avoided, and the workability can be enhanced.

The other of the front and rear frame pieces has a lower frame portion connecting lower ends of the left and right side frame portions, and the lower frame portion extends in the sheet width direction. And the first projecting portion is formed to project in a forward direction of the seat, and the extending portion projects in a forward direction of the seat in the same manner as the shape of the first projecting portion. It is preferable that the first projection and the second projection are joined in the sheet longitudinal direction at the overlapping position, with the projection extending to the position overlapping the first projection.
As described above, the front frame piece and the rear frame piece are joined in the seat longitudinal direction at the position where the first protrusion and the second protrusion overlap with each other, either of the front frame piece or the rear frame piece When an external force in the front-rear direction acts, peeling resistance in a plurality of directions including the tensile direction and the shear direction acts between the first protrusion and the second protrusion, and the bonding strength is enhanced.
Furthermore, the position at which the first and second protrusions overlap each other serves as an indication of the position at which the front and rear frame pieces overlap each other, and positioning can be easily performed.

Preferably, an adhesive is interposed between the front frame piece or the other of the rear frame pieces until reaching the end of the extension.
Thus, by the adhesive being interposed between the lower frame portion and the end of the extension, the front frame piece and the rear frame piece are peeled off from the end of the extension portion. Can be prevented, and the bonding strength can be increased.

Furthermore, it is preferable that the rear side frame piece and the front side frame piece be formed of a resin material.
As described above, by forming the rear side frame piece and the front side frame piece with a resin material, it is possible to reduce the weight of the back frame as compared to those formed with metal.

Further, in each of the rear side frame piece and the front side frame piece, a through hole through which a positioning pin passes is formed at a position facing in a superimposed state, and the rear side frame piece and the front side frame piece In the vicinity of the edge of any one of the through holes, the other side of the rear frame piece and the front frame piece bulges out more than the periphery, so that the periphery between the two is separated. Good.
As described above, the through holes through which the positioning pins pass are formed in each of the rear side frame piece and the front side frame piece, so that positioning can be performed by inserting the positioning pins through the through holes. Furthermore, by bulging the vicinity of the edge of the through hole through which the positioning pin passes, the periphery of the bulging portion is separated, a space for applying the adhesive to the separated portion is formed, and the bonding strength can be enhanced.

Furthermore, it is preferable that the rear side frame piece and the front side frame piece be combined to form a closed cross-sectional structure.
Thus, rigidity can be improved by combining the back side frame piece and the front side frame piece to form a closed cross-sectional structure.

Furthermore, it is preferable that a plurality of the projecting portions be formed, and that the plurality of the projecting portions be separated from the extending portion.
Thus, the spaces between the plurality of projecting portions and the extending portions are separated, so that a space for applying the adhesive is formed in the separated portions, and the bonding strength can be enhanced.

Moreover, according to the vehicle seat which concerns on the 2nd viewpoint of this invention, the said subject is solved by providing the said seat back frame.
Thus, by providing the vehicle seat with the seat back frame, the vehicle seat can enjoy the effects exhibited by the seat back frame.

Furthermore, according to the method of manufacturing the seat back frame according to the third aspect of the present invention, the front frame piece and the rear frame piece of the seat back frame are prepared, and the lower ends of the left and right side frame portions The side is bent in the sheet width direction, and the one left and right side frame portions are disposed on the extension in the sheet width direction of the other left and right side frame portions of the front frame piece or the rear side frame piece, The left and right side frame portions are released from the bent state, and the left and right side frame portions of both the front frame piece and the rear side frame piece are overlapped in the sheet width direction, and the left and right side frame portions are The above problem is solved by bonding.
In this manner, the lower end side of one of the left and right side frame portions is bent in the seat width direction, and the one of the left and right side frame portions is the other of the left and right side frame portions of the front frame piece or the rear side frame piece. It is disposed on the extension in the seat width direction, and the bent state of the left and right side frame portions is released, and the left and right side frame portions of both the front and rear frame pieces are overlapped in the seat width direction. Together, by bonding to both the left and right side frame portions, the adhesive applied to the opposite surface in the sheet width direction of either the front side frame portion or the rear side frame portion overlaps the both. It can be glued without being pushed back to one side. For this reason, the front frame piece and the rear side frame piece can be adhered uniformly and easily, and the efficiency of the bonding operation of the front side frame piece and the rear side frame piece can be enhanced.

ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the seat back frame which can improve the efficiency of the joining operation | work with a front frame piece and a back side frame piece.
According to the present invention, it is possible to increase the bonding strength between the front and rear frame pieces.
According to the present invention, it is possible to reduce the weight of the back frame.
According to the present invention, it is possible to increase the rigidity of the back frame.
According to the present invention, it is possible to provide a vehicle seat that enjoys the above-described effects exerted by the seat back frame.
ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the manufacturing method of the seat back frame which can raise the efficiency of the joining operation | work of a front side frame piece and a back side frame piece.

1 is a perspective view of a vehicle seat according to a first embodiment of the present invention. It is a perspective view showing a seat frame. It is a perspective view which shows a front side frame piece and a back side frame piece. It is a figure which shows the back side frame piece and front side frame piece of the back frame which concern on 1st Embodiment, It is a state before both joining in the cross section corresponding to the IV-IV cross section of FIG. It is a figure which shows the state which has not applied external force. It is a figure which shows the back side frame piece and front side frame piece of the back frame which concern on 1st Embodiment, It is a state before both joining in the cross section corresponding to the IV-IV cross section of FIG. It is a figure which shows the state which has given external force. It is a figure which shows the back side frame piece and front side frame piece of the back frame which concern on 1st Embodiment, It is in the state which cancelled | released the external force given to the front side frame piece, and back side frame piece and front side frame piece 4 is a cross-sectional view taken along the line IV-IV in FIG. It is a typical front view which shows the VA part of FIG. 2 of a back frame. It is a VB-VB cross section arrow line view of Drawing 5A about a back frame. FIG. 5C is a cross-sectional view of the back frame taken along the line VC-VC in FIG. 5A. It is a typical front view showing a projection of a back side frame piece concerning a modification, and a projection of a front side frame piece. It is a VIB-VIB cross section arrow line view of FIG. 6A. It is a state before joining of a back frame concerning a 2nd embodiment of the present invention, and is a sectional view showing a back side frame piece and a front side frame piece in a state where external force is given to a back side frame piece. It is a state which canceled the external force given to the back side frame piece, and is a sectional view showing the state where the back side frame piece and the front side frame piece were joined. It is a perspective view of a seat frame, and is an enlarged drawing around a reclining device. FIG. 9 is an AA cross-sectional view of the seat frame shown in FIG. 8 and an enlarged view of a side frame portion. It is an exploded perspective view of a reclining device attached to a side frame part via a connection bracket. It is a perspective view of the storage case of a reclining apparatus. It is an explanatory view when an internal structure of a reclining device is seen from the seat side. It is a perspective view of a connection bracket. FIG. 13C is a perspective view of the connection bracket shown in FIG. 13A from another angle. FIG. 13B is a cross-sectional view of the connection bracket shown in FIG. 13A, taken along the line BB, illustrating a process of assembling the connection bracket. FIG. 13B is a cross-sectional view of the connection bracket shown in FIG. 13A, taken along the line BB, illustrating a process of welding the connection bracket. FIG. 13B is a cross-sectional view of the connection bracket shown in FIG. 13A taken along the line BB, illustrating a process of attaching the connection bracket to the side frame portion. It is a BB sectional view of a connection bracket shown in Drawing 13A, and is a figure explaining an attachment process to a side frame part of a connection bracket, and a state where a side frame and a connection bracket were pasted up with adhesives. FIG. It is a perspective view which shows the skin material and trim cord of the seat back side in a seat cushion. It is a XVII-XVII cross-section arrow line view of FIG. 1, and is a schematic cross-sectional view of a cover in the shape where the rear end portion does not protrude in the outer diameter direction, and a connecting shaft. It is a XVII-XVII cross-section arrow line view of FIG. 1, and is a typical sectional view of a cover and a connecting shaft of the shape where a back side end projects to the diameter direction. It is a top view of a seat frame. It is a rear perspective view which shows a part of back frame and frame connection part. FIG. 19 is a top perspective view showing a harness mounting plate shown in a portion XX of FIG. 18 in an enlarged manner. It is a perspective view showing a conventional seat frame. FIG. 22 is a view showing a rear side frame piece and a front side frame piece of the conventional back frame, showing a state before bonding of the both in a cross section corresponding to the XXII-XXII cross section of FIG. 21. It is a XXII-XXII cross section arrow line view of FIG. 21 which shows the state by which the back side frame piece and front side frame piece in the conventional back frame were joined.

Hereinafter, a vehicle seat according to an embodiment of the present invention (hereinafter referred to as the present embodiment) will be described with reference to FIGS.
Here, in the following description, the front-rear direction of the vehicle seat is a direction that coincides with the traveling direction of the vehicle, and is hereinafter simply referred to as the front-rear direction. Further, the width direction of the vehicle seat is a direction coincident with the direction along the lateral width of the vehicle, and hereinafter, will be referred to simply as the width direction or the seat width direction. Also, the vertical direction is the vertical direction of the vehicle.
In the following description, unless otherwise specified, the vehicle seat is in use in the vehicle, that is, the configuration when the occupant is seated on the vehicle seat, and the direction described in the following description The position is the direction or position in the above state.

<< First Embodiment >>
A vehicle seat S according to a first embodiment of the present invention (hereinafter referred to as the present embodiment) will be described with reference to FIGS.
Here, FIG. 1 is a perspective view of a vehicle seat S according to a first embodiment of the present invention, FIG. 2 is a perspective view showing a seat frame F, and FIG. 3 is a front frame piece fa and a rear frame piece It is a perspective view showing ra.
4A is a view showing the rear side frame piece ra and the front side frame piece fa of the back frame F2 according to the first embodiment, and before bonding of both in the cross section corresponding to the IV-IV cross section of FIG. FIG. 4B is a view showing a state in which no external force is applied to the front frame piece fa, and FIG. 4B is a view showing a state in which an external force is applied to the front frame piece fa.
4C is a state in which the external force applied to the front frame piece fa is released and the rear frame piece ra and the front frame piece fa are joined to each other. FIG.

As shown in FIG. 1, the vehicle seat S includes a seat cushion 1 on which the buttocks of the occupant are placed, a seat back 2 on which the occupant leans, and a headrest 3 for supporting the head of the occupant. The seat cushion 1 and the seat back 2 are configured such that a cushion pad 1a is disposed on the cushion frame F1 and a cushion pad 2a is disposed on the back frame F2, and the

cover

1b and 2b are further covered. The headrest 3 has a structure in which a cushion pad 3a is placed on a core material (not shown) and covered with a skin material 3b, and is supported by a headrest pillar J attached to a back frame F2.

In particular, as shown in FIG. 2, the seat back 2 is provided with an occupant support member 10 made of a leaf spring which is an elastic material and for supporting the back of the occupant.
The occupant support member 10 relates to the relative arrangement of the front frame piece fa described later with the extension 20a of the front frame piece fa, and is provided as a pair on the left and right sides, and has a rectangular shape as described later To the upper and lower sides of ra, in other words, the lower frame portion 21a described later and the upper frame portion rk described later are fixed by the lower end fixing portion 10a and the upper end fixing portion 10b by rivets.

As shown in FIG. 2, the seat frame F of the vehicle seat S according to the present embodiment includes a cushion frame F1 that configures the seat cushion 1 and a back frame F2 that configures the seat back 2. The cushion frame F1 and the back frame F2 are made of carbon fiber reinforced plastic (CFRP) as a resin material, and the respective parts are integrally molded by molding.

As shown in FIG. 2, the cushion frame F1 is formed of a substantially rectangular frame serving as a framework of the seat cushion 1, and the slide rail device 5 for sliding the vehicle seat S in the front and back direction, and the vehicle seat It is attached to the vehicle body floor via a height adjustment device 6 for moving S in the vertical direction.
As shown in FIG. 2, the back frame F <b> 2 is supported by the lower end portion thereof being connected to the rear end portion of the cushion frame F <b> 1 via the reclining device 30. In such a state, the back frame F2 can rotate relative to the cushion frame F1.

The material of the cushion frame F1 and the back frame F2 is not limited to CFRP, and may be formed of a resin material other than CFRP, for example, a plastic containing glass fiber or a plastic without carbon fiber. . Further, the method of forming the cushion frame F1 and the back frame F2 is not limited to the case where CFRP is introduced into the mold and integrally molded, and methods other than the mold forming, for example, a sheet made of a resin material The cushion frame F <b> 1 and the back frame F <b> 2 may be formed by laminating in accordance with the above.

As shown in FIG. 3, the back frame F2 is joined to the front side of the rear frame piece ra formed substantially in a rectangular shape in front view and the rear frame piece ra, and the lower side is not rectangular but in the sheet width direction It comprises the front frame piece fa which is separated. The front frame piece fa and the rear frame piece ra are combined in the front-rear direction, and the shapes of the respective parts are correspondingly formed so that the outer shapes substantially match.

The rear frame piece ra extends to the rear side frame rs that extends vertically including the outer side portion 21b and the left and right ends of the lower frame portion 21a described later on the left and right of the seat width direction, A lower frame portion 21a connecting lower ends of the left and right outer portions 21b and an upper frame portion rk connecting upper ends of the left and right outer portions 21b are mainly formed.

In the lower frame portion 21a, a protrusion 21c as a first protrusion extending in the sheet width direction and bulging (projecting) to the front side in an arc shape in cross section is formed at the center. The projecting portion 21 c has a function of dispersing the stress applied to the lower frame portion 21 a when the seated person twists on the seat back 2. Furthermore, when attaching the front frame piece fa to the rear frame piece ra, a pair of through holes rh, which serve as a reference for positioning, is formed on both sides of the protrusion 21c.

In the upper frame portion rk, a pair of pillar portions rj which are U-shaped in cross section and extend upward are formed on the left and right.

The front frame piece fa is substantially the same as the lower frame portion 21a of the rear frame piece ra from the front side frame fs extending upward and the lower end portions of the left and right front side frames fs on the left and right of the seat width direction. It extends inward in the sheet width direction at a position that substantially coincides with the lower frame portion 21a of the rear frame piece ra from the rear end of the inner side portion 20b extending in the front and rear direction and the rear side frame piece ra at the matching height. It mainly includes an extending portion 20a that protrudes and an upper frame portion fk that connects upper ends of the left and right front side frames fs. The front side frame fs and the rear side frame rs are collectively referred to as a side frame SF. The side frame SF has a wide shape asymptotically forward and backward from above to below and has a curved shape when viewed from the left and right direction, and the lower end side protrudes forward than the upper end side. It is formed.

The front side frame fs is composed of a front face portion 20c and an outer side portion 20d. The outer side surface of the outer side portion 20d is on the inner side surface of the outer side portion 21b of the rear frame piece ra by the adhesive 44 shown in FIG. It is joined.

Each of the left and right extension parts 20a has substantially the same shape as the end of the protrusion 21c, and in the state where the front frame piece fa and the rear frame piece ra are overlapped, the end of the protrusion 21c is A protrusion 20 e is formed as a second protrusion along the surface. The protrusion 20 e has a function of dispersing the stress generated by the force applied to the extension 20 a. Furthermore, the position at which the protruding portion 20e and the protruding portion 21c overlap is a standard of the position at which the front side frame piece fa and the rear side frame piece ra overlap, and preliminary positioning can be performed.
Furthermore, a pair of through holes fh serving as a reference for accurate positioning is formed on both sides of the protrusion 20e when the front frame piece fa is attached to the rear frame piece ra.

The left and right extending portions 20a extend in the seat width direction so as not to reach the lower end fixing portions 10a of the left and right occupant support members 10, in other words, to avoid the lower end fixing portions 10a.
As described above, the extension 20a is formed, whereby the lower end fixing portion 10a of the occupant support member 10 is attached to the rear frame piece ra by the rivet, or between the rear frame piece ra and the front frame piece fa. Regardless of which of the joining in the sheet longitudinal direction is performed first, the operation is not hindered and the workability is improved.

In the upper frame portion fk, a pair of pillar portions fj having a U-shaped cross section is formed on the left and right. The pillar portion fj of the front frame piece fa is overlapped with the pillar portion rj in the front-rear direction to form a headrest pillar J having a rectangular cross section.

In the front frame piece fa, as described above, the extending portions 20a extending inward in the sheet width direction from the lower ends of the both front side frames fs are spaced apart in the sheet width direction. Thus, in the front frame piece fa, the extension portions 20a are formed to be separated from each other in the sheet width direction, and the front frame piece fa is made of a flexible material, so that the front side The lower sides of the left and right front side frames fs of the frame piece fa can be opened and closed in the sheet width direction.
In addition, if the front frame piece fa has flexibility enough to open and close the lower side of the left and right front side frames fs in the sheet width direction, the extension portions 20a are not necessarily the same. It does not need to be formed separately, that is, the left and right extending portions 20a may be formed in connection.

(About the joining method of the back side frame piece and the front side frame piece in 1st Embodiment)
A method of joining the rear side frame piece ra and the front side frame piece fa in the first embodiment will be described with reference to FIGS. 4A to 4C.

First, as shown in FIG. 4A, the adhesive 43, 44 is applied to the portion of the rear frame piece ra that comes into contact when the rear frame piece ra and the front frame piece fa overlap.
Specifically, the adhesive 43 is applied to the front surface side of the lower frame portion 21a of the rear frame piece ra and in contact with the extension portions 20a extending from the left and right of the front frame piece fa.
In particular, in a state in which the rear side frame piece ra and the front side frame piece fa shown in FIG. 4C are joined, the adhesive is extended to the end of the extension 20a between the extension 20a and the lower frame 21a. The adhesive 43 is applied to a position on the front surface of the lower frame portion 21a where the 43 intervenes. By applying the adhesive 43 in this manner, in the state where the rear side frame piece ra and the front side frame piece fa are joined, the end portions of the left and right extending portions 20a from the lower side frame portion 21a The stability of the bonding between the two is enhanced by avoiding the application of the force in the direction of separation.
Further, the adhesive 44 is applied to two places on the inner side surface side of the outer side portion 21 b and in contact with the outer side portion 20 d on the left and right of the front frame piece fa.

Next, as shown to FIG. 4B, the outer side part 20d in the front side frame fs of the both sides of the front side frame piece fa is pinched with the jig | tool T simplified and illustrated, and the front side frame fs on both sides is shown in FIG. 4B. After being deformed inward as indicated by the arrows, the front frame piece fa is moved so that both front side frames fs are disposed inside the rear frame piece ra.

Next, as shown in FIG. 4C, the jig T is removed from the front frame piece fa to release the force applied to the front frame piece fa. Then, due to the restoring force of elastic deformation, it moves in the direction shown by the arrow in FIG. 4C, and the back surface of the extension 20a adheres to the adhesive 43, and the outer part 20d adheres to the adhesive 44. .

Thus, when the front side frame piece fa and the rear side frame piece ra are combined, the front side frame fs and the inner side portion 20b of the front side frame piece fa and the lower side frame portion 21a and the outer side portion 21b of the rear side frame piece ra. The horizontal cross-section at the portion surrounded by and becomes a closed cross-section structure, and high rigidity is obtained.

In this manner, by deforming the front side frames fs on both sides of the front frame piece fa in the sheet width direction, joining of the front surface of the lower frame portion 21a of the rear frame piece ra to the rear surface of the front frame piece fa Joining of the inner side surface of the outer side portion 21b of the rear side frame piece ra and the outer side portion 20d of the front side frame piece fa can be performed substantially simultaneously. Therefore, when the front frame piece fa is superimposed on the rear frame piece ra, the adhesive 44 is not pushed out by the front frame piece fa, and it is possible to avoid the occurrence of deviation in adhesion by the adhesive 44. .

(About the joint strength of the lower part of the back side frame piece and the front side frame piece)
As described above, in order to make the front frame piece fa in the present embodiment flexible, the extension portions 20a extending inward from both sides of the lower end portion of the left and right front side frames fs are connected It has not been. For this reason, the extension length in the width direction is short as compared with that in which they are connected, and the bonding strength before and after bonding by the adhesive 43 becomes weak.
However, in the present embodiment, the rear frame piece ra and the front frame piece fa are devised to compensate for the decrease in bonding strength in the front-rear direction, and this devise will be described with reference to FIGS. 5A to 5C. .
Here, FIG. 5A is a schematic front view showing the VA portion of FIG. 2 of the back frame F2, and FIG. 5B is a cross-sectional view taken along the line VB-VB of FIG. 5A for the back frame F2. FIG. 5A is a cross-sectional view of the back frame F2 taken along the line VC-VC in FIG. 5A.

As described above, as shown in FIGS. 5A and 5C, the lower frame portion 21a of the rear frame piece ra is formed with a protrusion 21c at its center, and the extension portion 20a of the front frame piece fa is formed. As described above, the protrusion 20 e is formed along the both end portions of the protrusion 21 c.
As described above, the protrusion 20 e is formed along the protrusion 21 c having an arc-like cross section, and the adhesive 43 is applied between the protrusions 20 c to join the rear frame piece ra and the front frame piece fa. Become more robust. The reason is that the peeling resistance force in the radial direction of the cross-sectional arc shape acts on the portion joined by the adhesive 43 between the protruding portion 21c and the protruding portion 20e of the cross-sectional arc shape.

Furthermore, a pair of through holes rh is formed on both sides of the protrusion 21c of the rear frame piece ra, and a pair of through holes fh is similarly formed on both sides of the protrusion 20e of the front frame piece fa. And have been described as being the reference for positioning.
Specifically, as shown in FIG. 5B, the positioning pin Pa is inserted through the through hole rh and the through hole fh to position the rear frame piece ra and the front frame piece fa1 in a superimposed manner. It is realized by being fixed by the tool Pb.

Here, the front frame piece fa is formed to bulge toward the rear frame piece ra in the vicinity of the through hole fh. That is, the front frame piece fa is formed so as to have a gap other than in the vicinity of the through hole fh in a state of being fixed by the positioning pin Pa.
By thus forming the gap, the adhesive 43 can be interposed in the gap portion even in the state of being fixed by the positioning pin Pa, and the bonding strength can be enhanced.

<Modification>
In the above embodiment, only one protrusion 21 c of the rear frame piece ra is provided, but the present invention is not limited to this configuration.
As another configuration, with reference to FIGS. 6A and 6B, a protrusion 21d as a first protrusion of a rear frame piece rb according to a modification and a protrusion 20f as a second protrusion of the front frame piece fb. Explain.
6A is a schematic front view showing a protrusion 21d of the rear frame piece rb and a protrusion 20f of the front frame piece fb according to a modification, and FIG. 6B is a sectional view taken along the line VIB-VIB in FIG. 6A. It is.

Two protrusions 21 d of the rear frame piece rb are provided at the top and bottom, and like the protrusions 21 c in the above embodiment, the protrusions 21 d in the above embodiment form an arc in cross section and extend in the sheet width direction toward the front side. ing.
As shown in FIGS. 6A and 6B, the projecting portion 20f of the front frame piece fa is formed so as to expand in the front side of the seat in an arc shape of an oval so as to straddle the two projecting portions 21d.
When the protrusion 21 d of the rear frame piece rb formed in this manner and the protrusion 20 f of the front frame piece fa are superimposed, as shown in FIG. 6B, two of the rear frame piece rb are formed. A large gap is formed between the protrusions 21 d and the protrusions 20 f of the front frame piece fa.
In the rear side frame piece rb and the front side frame piece fb according to the modification, the bonding strength can be enhanced because the adhesive 43 can be more intervened in the gap portion.

<< Second Embodiment >>
In the above embodiment, the front frame piece fa is bent in the width direction and attached to the rear frame piece ra. However, the present invention is not limited to such a configuration.
For example, with regard to the back frame F3 as the seat back frame according to the second embodiment, FIG. 7A and FIG. 7 show configurations and methods by which the rear frame piece rc can be bent in the width direction and attached to the front frame piece fc. This will be described with reference to 7B.

Here, FIG. 7A is a cross-sectional view showing the rear frame piece rc and the front frame piece fc in a state before joining of the back frame F3 and applying an external force to the rear frame piece rc. .
FIG. 7B is a cross-sectional view showing a state in which the external force applied to the rear frame piece rc is released and the rear frame piece rc and the front frame piece fc are joined.

The back frame F3 according to the second embodiment is different from the configuration of the back frame F2 according to the first embodiment in the separated portion of the lower central portion of the front frame piece fa and the lower side of the rear frame piece ra. The connection part connected by the frame part 21a is reversely comprised. The configuration of the back frame F3 other than those mentioned below is the same as that of the back frame F2 according to the first embodiment.

Specifically, the back frame F3 is joined to the front side of the rear frame piece rc which is not rectangular as viewed from the front but separated at the lower side as shown in FIG. 7A and the front side of the rear frame piece rc The front frame piece fc is substantially rectangular.

The rear frame piece rc extends in the seat width direction from the lower end sides of the left and right side frame portions 21f toward the inner side in the seat width direction, extending to the back of the seat and the side frame portion 21f extending up and down. And an extending portion 21e.

The front frame piece fc extends leftward and rightward in the seat width direction, and extends to the back of the seat at a position substantially coincident with the extension 21e of the rear frame piece rc. And a lower frame portion 20g connecting the lower ends of the front side frame fsa.

The front side frame fsa is composed of a front surface portion 20i and an outer side portion 20j, and the outer side portion 20j is joined to the inner side surface of the side frame portion 21f of the rear side frame piece rc by an adhesive 44 shown in FIG. Ru.

(About the joining method of the back side frame piece and the front side frame piece in a 2nd embodiment)
Next, a method of joining the rear frame piece rc and the front frame piece fc in the second embodiment will be described with reference to FIGS. 7A and 7B.

First, the adhesive 43, 44 is applied to the portion of the front frame piece fc that abuts when the rear frame piece rc and the front frame piece fc are overlapped.
Specifically, the adhesive 43 is applied to two places on the back side of the lower frame part 20g of the front frame piece fc and in contact with the front face of the extension part 21e extending from the left and right of the rear frame piece rc Do.
In particular, in the state where the rear side frame piece rc and the front side frame piece fc shown in FIG. 7B are joined, the adhesive is extended to the end of the extending portion 21e between the extending portion 21e and the lower frame portion 20g. The adhesive 43 is applied to the position of the rear surface of the lower frame portion 20g where the 43 is to be interposed. By applying the adhesive 43 in this manner, in a state in which the rear frame piece rc and the front frame piece fc are joined, the lower frame portion 20g is provided at the end of the left and right extension portions 21e. The stability of the bonding between the two is enhanced by avoiding the application of the force in the direction of separation.
Further, the adhesive 44 is applied to two places on the outside surface side of the outside portion 20j of the front side frame fsa and in contact with the inside surface of the side frame portion 21f of the rear frame piece rc.

Next, a jig T illustrated in a simplified manner is pressed against the inner surfaces of the side frame portions 21f on both sides of the rear side frame piece rc, and the side frame portions 21f on both sides are deformed outward as shown by arrows in FIG. 7A. After that, the rear frame piece rc is moved so that both side frame portions 21 f are disposed outside the front frame piece fc.

Next, as shown in FIG. 7B, the jig T is removed from the rear frame piece rc to release the force applied to the rear frame piece rc. Then, by the restoring force of elastic deformation, it moves in the direction shown by the arrow in FIG. 7B, and the front surface of the extension 21e adheres to the adhesive 43 and the side frame 21f adheres to the adhesive 44. Become.

Thus, when the front side frame piece fc and the rear side frame piece rc are combined, the front side frame fsa and the inner side portion 20h of the front side frame piece fc and the extension portion 21e and the side frame portion 21f of the rear side frame piece rc The horizontal cross-section at the portion surrounded by and becomes a closed cross-section structure, and high rigidity is obtained.

Thus, by deforming the side frame portions 21f on both sides of the rear frame piece rc in the sheet width direction, the back surface of the lower frame portion 20g of the front frame piece fc and the extension portion 21e of the rear frame piece rc Bonding with the front surface and bonding with the outer surface of the front side frame fsa of the front frame piece fc and the inner surface of the side frame portion 21f of the rear frame piece rc can be performed substantially simultaneously. Therefore, when the front frame piece fc is superimposed on the rear frame piece rc, the adhesive 44 is pushed out by the front frame piece fc, so that it is possible to avoid the occurrence of deviation in adhesion by the adhesive 44.

The above embodiments are merely examples for facilitating the understanding of the present invention, and do not limit the present invention. That is, the manufacturing process of the seatback manufacturing method, such as the shape, size, and arrangement of the portions of the back frames F2 and F3 according to the above embodiment can be changed or improved without departing from the spirit of the present invention Of course, the invention includes its equivalents.

For example, in the description of the first embodiment, the left and right extending portions 20a extend in the seat width direction to a length that does not reach the lower end fixing portions 10a of the left and right occupant support members 10 in this embodiment. It explained as a thing.
However, the extension part according to the present invention is not limited to such a form, and the work of attaching the passenger support member to the rear side frame piece, or joining of the rear side frame piece and the front side frame piece in the seat longitudinal direction It should be in a form that does not inhibit
For example, even if the left and right extending portions 20a extend in the seat width direction beyond the lower end fixing portions 10a of the left and right occupant support members 10, a part is formed so as to avoid the lower end fixing portions. Just do it.

<< Vehicle seat according to another example equipped with a reclining device >>
According to the seat back 2 described above, it is possible to reduce the weight and improve the fuel consumption by being molded from a resin material, and work to join the front frame pieces fa, fb, fc and the rear frame pieces ra, rb, rc It is possible to improve the efficiency of
Here, as an example of a vehicle seat for the purpose of weight reduction, there is provided a reclining device for rotatably supporting a seat back having a back frame as a frame with respect to a seat cushion, and a portion to which this reclining device is attached It is known that the side frame portion constituting the back frame is formed of a resin material (see Japanese Patent Application Laid-Open No. 2003-182417).

In the vehicle seat described in Japanese Patent Application Laid-Open No. 2003-182417, the entire back frame is formed as an integral member by a composite material having a thermoplastic matrix and a reinforcing fiber, and is equivalent to a side frame portion. At the lower end of the side upright portion, a hinge device corresponding to a reclining device is overmolded.

By the way, as an assembly | attachment structure of a reclining apparatus, there exists a thing in which the reclining apparatus was attached to the side frame part outer surface of the back frame. In that case, there is a demand for a technique that facilitates the assembling operation while securing the mounting rigidity of the reclining device.
In particular, in the case where the back frame is formed of a resin material for the purpose of weight reduction, it is necessary to further improve the mounting rigidity of the reclining device as compared with the case where it is formed of a metal material. There is a demand for advanced techniques for facilitating the assembly work.
For example, in the vehicle seat described in Japanese Patent Laid-Open No. 2003-182417, the mounting rigidity of the reclining device is secured by overmolding the reclining device when resin molding the back frame, but the structure Due to the complexity, the molding operation for assembling has been relatively difficult.

In the following, there will be described a vehicle seat which facilitates the assembling operation while improving the mounting rigidity of the reclining device (member to be assembled) with respect to the seat frame serving as the framework in the manufacturing process. In particular, a vehicle seat in which the rigidity of the seat frame made of a resin material and the mounting rigidity of the reclining device are further improved will be described.

A vehicle seat S according to an embodiment as a first configuration example will be described with reference to FIGS. 8 to 15 in addition to FIGS. 1 and 2.
This embodiment is a vehicle seat S provided with a reclining device 30 rotatably supporting a resin-made back frame F2, and the connection bracket 50 for connecting the reclining device 30 to the back frame F2 and a spring hook The present invention relates to the invention of a vehicle seat S including a stop member 60 and positioning pins 70 and 80 for positioning the spring locking member 60 with respect to the connection bracket 50. In particular, according to the present invention, a part of the positioning pins 70 and 80 is joined to the spring locking member 60 by a single laser welding process from the back frame F 2 contact surface side of the connection bracket 50. The present invention relates to a vehicle seat S characterized in that a portion is joined to a spring locking member 60.

As shown in FIG. 8, shaft holes (not shown) for inserting the pivot shaft 40 of the reclining device 30 are formed at the lower end portions of the side frames SF and on the left and right side surfaces. The pivot shaft 40 is disposed between the left and right side frames SF with the axial direction extending in the lateral direction, and the extension end of the pivot shaft 40 is laterally outward from the outer surface of the side frame SF through the axial hole. Projected into The projecting end of the pivoting shaft 40 is assembled with the reclining device 30 through the connection bracket 50, and the operating lever 42 shown in FIG. 2 is attached to a position outside the reclining device 30.
The number of reclining devices 30 may be disposed on both sides in the left-right direction of the vehicle seat S, or may be disposed on only one side in the left-right direction.

As shown in FIG. 9, the front side frame fs is made of a resin molding having a substantially crank-shaped cross section elongated in the vertical direction, and a front portion 20c which is a front portion of the side frame SF and left and right outer sides of the front portion 20c. It is comprised from the outer side part 20d bent back from the edge part, and the inner side part 20b bent back from the left and right inside edge part of the front face part 20c.
The rear side frame rs is formed of a resin molding having a substantially L-shaped cross section elongated in the vertical direction, and the left and right outer end portions of the frame rear wall portion 21g and the frame rear wall portion 21g to be the rear portion of the side frame SF. And an outer portion 21b bent forwardly from
At this time, the outer side portion 20d of the front side frame fs and the outer side portion 21b overlap in the left-right direction, and the rear end portion of the inner side portion 20b and the front surface of the frame rear wall portion 21g overlap in the front-rear direction ing.

In addition, the inner portions 20b of the left and right front side frames fs extend rearward in such a manner as to be inclined inward in the left and right directions from the front side. Therefore, when the front frame piece fa is assembled to the rear frame piece ra, the front frame piece fa can be connected while being bent to the left and right, and the assemblability of the back frame F2 is improved.

As shown in FIG. 8 or FIG. 9, a connection bracket 50 for connecting the side frame SF and the reclining device 30 is attached to the left and right outer surfaces of the side frame SF as shown in FIG.
Specifically, as shown in FIG. 9, a plurality of positioning hole portions 26c for attaching and positioning the connection bracket 50 are formed on the left and right outer side surfaces of the rear side frame rs in the side frame SF.
Further, as shown in FIG. 9, the portion of the side frame SF to which the connection bracket 50 is attached is formed to be thicker than the portion to which the connection bracket 50 is attached. Therefore, the rigidity of the side frame SF and the mounting rigidity of the reclining device 30 attached to the side frame SF can be secured.

The reclining device 30 corresponds to a member to be assembled in the supplementary note described later, and as shown in FIG. 8, comprises a device for rotatably connecting the back frame F2 to the cushion frame F1. It is attached to the side via a connection bracket 50.
As shown in FIG. 10 or 11, the reclining device 30 mainly includes a reclining device main body 31 which is driven when rotating the back frame F2, and a housing case 32 which houses the reclining device main body 31 There is.

The reclining device main body 31 includes a slide lock member 35 as shown in FIG. 12, and the lock gear portion 34 attached to the slide lock member 35 is engaged by the movement movement of the slide lock member 35 in the vertical direction. 33 will be engaged or disengaged.
Switching the state of the back frame F2 between the locked state fixed to the cushion frame F1 and the unlocked state that can be rotated relative to the cushion frame F1 by such a reclining device main body 31 It is possible.

The housing case 32 is formed of a metal case for housing the reclining device main body 31 and has a substantially cylindrical outer shape, and as shown in FIG. 10 or 11, the outer case piece 32a and the inner case piece 32b It is configured in combination.
As shown in FIG. 10, the outer case piece 32a has its outer peripheral surface joined to the cushion frame F1 side, and as shown in FIG. 12, an engaging gear 33 is formed on the inner peripheral surface, The slide lock member 35 is disposed inside.
The inner case piece 32b is joined to the back frame F2 via the connection bracket 50, and on the inner side thereof, a pair of

path defining portions

36, 36 defining the moving path of the slide lock member 35 is a slide lock member 35. It is arranged in a state of sandwiching the. Further, a cam surface 37 is formed on the slide lock member 35, and the cam body 38 in contact with the cam surface 37 is fixed to the rotating shaft 40 which penetrates the inner case piece 32b and enters the case. Is attached.

In the above configuration, as shown in FIG. 12, in the reclining device 30, the slide lock member 35 is disposed at a position where the lock gear portion 34 and the engagement gear 33 engage with each other at normal times, and the back frame F2 Lock the lock status.
When the operation lever 42 shown in FIG. 2 is operated in such a state, the rotation shaft 40 is rotated by the operation, and the cam body 38 is rotationally moved in conjunction with this, and the cam in a rotation state The separation of the body 38 from the cam surface 37 causes the sliding lock member 35 to move between the

path defining portions

36 and 36 in a direction away from the engagement gear 33.
As a result, the lock gear portion 34 is disengaged from the engagement gear 33, and the state of the back frame F2 is unlocked.

Then, while the state of the back frame F2 is in the unlock state, the occupant can tilt the seat back 2 backward, and when the control lever 42 is released when the back tilt angle reaches a desired angle, the spring 39 The cam body 38 is returned to the original position by the biasing force of. In conjunction with the operation of the cam body 38, the slide lock member 35 moves between the

path defining portions

36, 36 toward the engagement gear 33 and returns to the locked position.
As a result, when the operation of the control lever 42 is completed, the lock gear portion 34 engages with the engagement gear 33 again, and the state of the back frame F2 returns to the locked state.

The reclining device 30 is attached to the back frame F2 by being bonded to the connection bracket 50 with an adhesive (not shown) as shown in FIG.
Specifically, in the reclining device 30, a fitting hole 32b is formed on the outer surface of the connection bracket 50, which will be described later, with a fitting projection 32c shown in FIG. The connection bracket 50 is bonded with an adhesive (not shown).

As shown in FIG. 10, a spiral spring 41 is latched on the lower end portion of the back frame F2 to which the reclining device 30 is attached and the rear end portion of the cushion frame F1.
The spiral spring 41 corresponds to a biasing spring in the supplementary note to be described later, and when the state of the back frame F2 is in the unlock state and the seat back 2 is in the rearward tilt state, The frame F2 is urged to rotate to the cushion frame F1 side.
One end 41a of the spiral spring 41 is provided on the back frame F2 side, and is held by a spring locking member 60 extending outward in the left-right direction, and the other end 41b is provided on the cushion frame F1 side. It is latched by the spring latching | locking part 11 extended to the left-right direction outer side.

The connection bracket 50 corresponds to a first member in the supplementary note described later, and as shown in FIG. 10, is formed of a substantially U-shaped metal plate for connecting the side frame SF and the reclining device 30. It is arranged to hold the
The connection bracket 50 includes a main body wall 51 attached to the left and right outer side surfaces of the side frame SF, a front wall 52 extending from the front end to the left and right from the front end, and an upper end side of the main body wall 51. And mainly includes a rear wall 53 extending inward from the rear end to the left and right.
The front wall 52 is attached to the front surface 20c of the front side frame fs, and the rear wall 53 is attached to the frame rear wall 21g of the rear side frame rs.
As shown in FIG. 15B, the front wall 52 and the rear wall 53 overlap with the front side frame fs and the rear side frame rs, respectively, and are adhesively bonded by an adhesive 45 and further mechanically bonded by a fastening member. The rigidity of the side frame SF and the mounting rigidity of the reclining device 30 are enhanced.

The main body wall portion 51 is a plate member interposed between the outer side portion 21 b of the rear side frame rs and the accommodation case 32 of the reclining device 30 in the side frame SF.
As shown in FIGS. 13A and 13B, the main body wall 51 is formed in the central portion, and is close to the shaft hole 51a for allowing the pivot shaft 40 of the reclining device 30 to penetrate and the shaft hole 51a, A plurality of fitting holes 51b formed on the outer side in the radial direction, for fitting the storage case 32 of the reclining device 30, and above the shaft hole 51a, for positioning the spring locking member 60 And a second hole 51d formed on the radially outer side of the shaft hole 51a for positioning with respect to the side frame SF.

At least a part of the outer peripheral portion of the shaft hole 51a of the main body wall 51 is bent inward to the left and right and is fitted into the shaft hole of the side frame SF, and the connection bracket 50 is positioned with respect to the side frame SF. . Further, the mounting rigidity of the reclining device 30 is secured.
The fitting hole 51b is formed in four directions so as to surround the shaft hole 51a in a circular shape, and is fitted with a fitting protrusion 32c formed on the outer surface of the inner case piece 32b of the storage case 32 shown in FIG. By doing this, the reclining device 30 is positioned with respect to the connection bracket 50.

The first hole 51 c is a portion to which the spring locking member 60 is attached, and two substantially circular through holes are formed at predetermined intervals in the front-rear direction. The spring locking member 60 is attached to the connection bracket 50 by fitting a positioning pin 70 described later toward the spring locking member 60 from the first hole 51 c side.
The second hole 51 d is a portion attached to the side frame SF, and a plurality of second holes 51 d are formed as a substantially circular through hole at a predetermined interval so as to surround the shaft hole 51 a. The main body wall 51 is attached to the side frame SF by inserting positioning pins 80 described later into the second hole 51 d from the left and right sides.

Specifically, the main body wall 51 is adhesively bonded to the left and right outer portions 21b of the side frame SF by the adhesive 45, and further by a plurality of positioning pins 80 arranged so as to surround the pivot shaft 40 of the reclining device 30. It is mechanically joined.
Then, two substantially circular concave portions 54 recessed toward the side frame SF are formed on the outer surface of the connection bracket 50 at a position different from the upper portion and to which the positioning pin 70 and the positioning pin 80 are attached. It is done.
Therefore, the gap between the adhesive 45 can be secured by bringing the side frame SF into contact with the concave portion 54 of the connection bracket 50, and the adhesive 45 is uniformly applied to the overlapping surface of the side frame SF and the connection bracket 50. Can be applied to

The spring locking member 60 corresponds to a second member in the supplementary note described later, and is a substantially L-shaped sheet metal member for locking one end of the spiral spring 41.
As shown in FIGS. 13A and 13B, the spring locking member 60 extends from the side of the side frame SF to the left and right outside, and holds a spring locking portion 61 that locks one end of the spiral spring 41; And an attachment portion 62 which is attached to the connection bracket 50 and extends downward from the left and right inner end portions thereof.
The mounting portion 62 is formed with a first hole 62 a for positioning with respect to the connection bracket 50.

The two first hole portions 62a are formed as a substantially circular through hole at predetermined intervals in the front-rear direction, and communicate with each other in a state of being joined to the first hole portion 51c of the connection bracket 50. .
Then, the positioning pin 70 is inserted from the left and right inner side surfaces of the connection bracket 50 and fitted in the first hole 51 c and the first hole 62 a, whereby the spring locking member 60 is attached to the connection bracket 50. It is attached.
The spring locking member 60 is welded to the left and right outer side surfaces of the connection bracket 50, and mechanically joined by the plurality of positioning pins 70 as described above. Therefore, the mounting rigidity of the spring locking member 60 is improved.

The positioning pin 70 corresponds to a first positioning member in the appending to be described later, and is a member for positioning the spring locking member 60 with respect to the connection bracket 50. As shown in FIGS. 13A and 13B, It has a cylindrical shape.
The positioning pin 70 is, as shown in FIG. 14A, a first fitting portion 71 fitted in the first hole portion 51 c of the connection bracket 50 and a second fitting portion fitted in the first hole portion 62 a of the spring locking member 60. A fitting portion 72 and a frame fitting portion 73 fitted to the positioning hole portion 26c shown in FIG. 10 of the side frame SF are provided.
Each of the first fitting portion 71, the second fitting portion 72, and the frame fitting portion 73 has a substantially circular cross section and extends in the left-right direction. The cross-sectional area of the second fitting portion 72 is narrower than the cross-sectional area of the first fitting portion 71, and the cross-sectional area of the frame fitting portion 73 is narrower than the cross-sectional area of the first fitting portion 71. It is formed wider than the cross-sectional area of the part 72.
The positioning pin 70 is inserted from the left and right inner side surfaces of the connection bracket 50 toward the spring locking member 60.

Positioning pin 80 corresponds to a second positioning member in the supplementary note described later, and is a member for positioning connecting bracket 50 with respect to side frame SF, and as shown in FIGS. 13A and 13B, has a substantially cylindrical shape having a flange. It consists of
The positioning pin 80 is, as shown in FIG. 14A, a frame fitted in each of the second hole 51 d of the connection bracket 50 and the positioning hole 26 c (corresponding to the second hole) shown in FIG. 10 of the side frame SF. A fitting portion 81 and an abutting portion 82 which abuts on the left and right outer surface sides of the connection bracket 50 and which has a larger cross-sectional area than the frame fitting portion 81 are provided.
The positioning pin 80 is inserted toward the side frame SF from the left and right outer surface side of the connection bracket 50.

Next, a structure in which the reclining device 30 is attached to the side frame SF via the connection bracket 50 and the spring locking member 60 will be described based on FIGS. 14 and 15.

First, an operation of assembling the spring locking member 60 to the connection bracket 50 is performed.
Specifically, as shown in FIG. 14A, the first hole portion 51c of the connection bracket 50 and the first hole portion 62a of the spring locking member 60 are placed in communication with each other and positioned in these hole portions The pin 70 is inserted from the right and left inner side of the connection bracket 50 and assembled.
At this time, as shown in FIG. 14B, the first fitting portion 71 of the positioning pin 70 is fitted with the first hole 51c, and the second fitting portion 72 is fitted with the first hole 62a. Become. Then, the first fitting portion 71 is disposed in contact with the peripheral portion of the first hole 62 a in the spring locking member 60.
In addition, the contact surfaces of the connection bracket 50 and the first fitting portion 71 with the side frame SF, that is, the left and right inner side surfaces are arranged substantially in the same plane.

After assembling the positioning pin 70, the positioning pin 80 is assembled in the same manner.
Specifically, the positioning pin 80 is inserted into the second hole 51 d of the connection bracket 50 from the left and right outside of the connection bracket 50 and assembled.
At this time, as shown in FIG. 14B, the frame fitting portion 81 of the positioning pin 80 is fitted with the second hole 51d. Then, the contact portion 82 is disposed in contact with the peripheral portion of the first hole 62 a in the left and right outer side surfaces of the spring locking member 60.

Next, in a state where the spring locking member 60 is assembled to the connection bracket 50, the laser welding operation is performed.
Specifically, as shown in FIG. 14B, by laser welding from the left and right inner side of the connection bracket 50, a part of the first fitting portion 71 of the positioning pin 70 is melted and the first of the spring locking members 60 is While being joined to the peripheral portion of the one hole 62 a, a part of the connection bracket 50 is melted and joined to the spring locking member 60.
Furthermore, in the same laser welding process, the peripheral portion of the second hole 51 d of the connection bracket 50 is melted and joined to the contact portion 82 of the positioning pin 80.
Thus, the connection bracket 50, the spring locking member 60, the positioning pin 70, and the positioning pin 80 can be respectively welded and fixed by one laser welding process.

Next, the reclining device 30 is assembled to the connection bracket 50 to which the spring locking member 60 is fixed.
Specifically, the fitting projections 32c of the reclining device 30 shown in FIG. 11 are inserted from the left and right outer directions into the fitting holes 51b of the connecting bracket 50 shown in FIGS. 13A and 13B and assembled.
At this time, the attachment rigidity of the reclining device 30 is improved by applying an adhesive (not shown) to the contact surfaces of the left and right outer surfaces of the connecting bracket 50 and the left and right inner surfaces of the reclining device 30.

Next, an operation of assembling the connection bracket 50 fixing the reclining device 30 to the side frame SF is performed.
Specifically, as shown in FIG. 15A, in the connection bracket 50 in the state where the positioning pins 70 and 80 are welded and fixed, the positioning hole portion 26c having the

frame fitting portion

73 and 81 on the outer surface of the side frame SF. Insert from the left and right outside and assemble.
At this time, the adhesive 45 is applied to the contact surfaces of the left and right inner side surfaces of the connection bracket 50 and the left and right outer side surfaces of the side frame SF, thereby improving the attachment rigidity of the reclining device 30 to the side frame SF. There is.

Thereafter, as shown in FIG. 10, the front wall 52 and the rear wall 53 of the connection bracket 50 are assembled to the front and rear surfaces of the side frame SF, respectively, to complete the assembling operation of the reclining device 30 to the side frame SF.
After the reclining device 30 is attached, as shown in FIG. 10, the cushion frame F1, the operation lever 42 shown in FIG. 2, and the spiral spring 41 are attached to the left and right outside of the reclining device 30 in this order.

In the above embodiment, the front frame piece fa and the rear frame piece ra are separately resin-molded to constitute the back frame F2 for the purpose of facilitating the molding operation, but the invention is not limited thereto. The back frame F2 may be formed as an integral part.

In the above embodiment, the fixing means of the side frame SF and the connection bracket 50 and the fixing means of the reclining device 30 and the connection bracket 50 are not particularly limited, and bonding with adhesive, welding, bolting or riveting It is possible to suitably use known fixing means such as fastening, and a plurality of fixing means may be combined to improve the fixing strength.

In the above embodiment, the reclining device 30 is configured as an assembled member assembled to the side surface (assembled portion) of the back frame F2 in the seat width direction, but is not limited thereto. The target can be changed as appropriate.
For example, a well-known component to be assembled to a predetermined portion (assembly portion) of the cushion frame F1 or the back frame F2 in the seat frame F may be widely applied as a member to be assembled.

In the above embodiment, the connection bracket 50 and the spring locking member 60 are formed of a metal material, but the invention is not limited thereto, and may be formed of a resin material or another known material. For example, weight reduction of the vehicle seat can be achieved by forming the connection bracket 50 and the spring locking member 60 from a resin material.

In the above embodiment, the connection bracket 50 includes the front wall 52 and the rear wall 53, and as shown in FIG. 10, the front wall 52 is attached to the front surface 20c of the front side frame fs, and the rear wall Although 53 is attached to the flame | frame rear wall part 21g of the back side frame rs, it can change suitably.
For example, the front end side of the connection bracket 50 is preferably attached to at least the front side frame fs, and the rear end side is preferably attached to at least the rear side frame rs for securing rigidity, but the shape, arrangement, and configuration can be changed as appropriate It is.

In the above embodiment, the connection bracket 50 and the spring locking member 60 are configured as a first member and a second member for connecting the reclining device 30 to the back frame F2, but the invention is not limited thereto. The objects of the first member and the second member can be changed as appropriate.
For example, the first member and the second member may be widely applied as a known component and a connecting member for attaching a known device to the cushion frame F1 or the back frame F2.

In the above embodiment, although the connection bracket 50 and the spring locking member 60 are joined by laser welding, the present invention is not limited to this, spot welding, ultrasonic welding, etc., instead of laser welding, may be used as the base material. You may use suitably the well-known welding method which melt | dissolves and joins a part.

In the above embodiment, as shown in FIG. 15, the contact surfaces of the connection bracket 50 and the first fitting portion 71 of the positioning pin 70 with the side frame SF are formed to be substantially the same plane. However, as long as they can be joined in a single laser welding process, they do not necessarily have to be substantially the same plane, and can be changed appropriately by providing a level difference or the like.

In the above embodiment, as shown in FIG. 10, a portion of the connection bracket 50 to which the spring locking member 60 is attached and a portion of the reclining device 30 are disposed at a position where they overlap when viewed from the seat side. However, in order to suppress the interference, it is possible to change the position so as to be slightly apart in the vertical or longitudinal direction and not overlap.

In the present embodiment, the vehicle seat S according to the present configuration example has been mainly described.
However, the above embodiment is merely an example for facilitating the understanding of the present invention, and does not limit the present invention. It goes without saying that the invention can be modified and improved without departing from the spirit of the invention and the invention includes the equivalents thereof.
In particular, the shape, arrangement, and configuration of the back frame F2, the reclining device 30, the connection bracket 50, the spring locking member 60, and the positioning pins 70 and 80 described in the above embodiment are merely an example. Therefore, the invention is not limited. In particular, in the vehicle seat S according to the present embodiment, at least the side frame portion of the back frame F2 to which the reclining device 30 is attached may be made of a resin material.

The invention embodied in the first configuration example may also be described as the following supplementary notes.
(Supplementary Note 1)
A seat frame serving as a framework of a vehicle seat, and an assembled member assembled to an assembled portion provided to the seat frame;
A first member and a second member interposed between the assembling portion and the assembled member for assembling the assembled member and joined together;
A hole formed in each of the first member and the second member and in communication with each other when the first member and the second member are joined;
And a positioning member for positioning the second member with respect to the first member by fitting into the hole.
The member to be assembled is attached to the side of the first member in contact with the second member in a state in which a portion thereof is engaged with the second member,
The positioning member includes a first fitting portion that fits into the hole of the first member, and a second fitting portion that fits into the hole of the second member and has a narrower cross-sectional area than the first fitting portion. A fitting portion, and is inserted into the hole from the side opposite to the contact surface side of the first member,
By welding from the opposite side to the contact surface side of the first member, a part of the first fitting portion melts and is joined to the second member, and a part of the first member Is melted and joined to the second member.

(Supplementary Note 2)
The member to be assembled is a reclining device rotatably connecting a back frame serving as a framework of a backrest to a cushion frame serving as a framework of a seating portion of the vehicle seat,
The vehicle seat according to claim 1, wherein the assembling portion is a side surface of the back frame in the seat width direction.

(Supplementary Note 3)
The back frame constitutes a side in the sheet width direction, and includes a side frame portion made of a resin material,
The vehicle seat according to claim 2, wherein the first member and the second member are attached to a lateral surface of the side frame portion in the seat width direction.

(Supplementary Note 4)
The first member is a connection bracket interposed between the back frame and the reclining device,
The reclining device includes a biasing spring that biases the back frame toward the cushion frame about a pivot shaft of the reclining device.
The vehicle seat according to

claim

2 or 3, wherein the second member is a spring locking member that locks one end side of the biasing spring.

(Supplementary Note 5)
The vehicle according to any one of appendices 2 to 4, characterized in that the contact surface of each of the first member and the first fitting portion of the positioning member with the back frame forms a flat surface. Seat.

(Supplementary Note 6)
The weld joint is a laser weld joint, and
Additional feature 2 to feature of the present invention is that the overlapping portion of the first fitting portion and the second member and the overlapping portion of the first member and the second member, which are joined, form a flat surface, respectively. The vehicle seat according to any one of 5.

(Appendix 7)
The second member is attached to the sheet width direction outer surface of the first member,
The device according to any one of claims 2 to 6, wherein a portion of the first member to which the second member is attached and a part of the reclining device overlap with each other when viewed from the side of the seat. Vehicle seat described in.

(Supplementary Note 8)
The positioning member extends from the first member side toward the back frame side, and is fitted in a hole formed in the back frame. Vehicle seat.

(Appendix 9)
The hole is a first hole, and
The positioning member is a first positioning member, and
A second hole formed in each of the first member and the back frame and in communication with each other when the first member and the back frame are joined;
And a second positioning member for positioning the first member with respect to the back frame by fitting into the second hole.
The second positioning member is inserted into the second hole from the side of the first member in contact with the second member, and is fitted into the second hole of each of the first member and the back frame. And a contact portion which is in contact with the contact surface side of the first member and has a cross-sectional area larger than that of the frame connection portion.
By welding from the side opposite to the contact surface side of the first member, a part of the first member is melted and joined to the contact portion of the second positioning member. The vehicle seat according to any one of appendices 2 to 8.

(Supplementary Note 10)
The first member includes a body wall attached to the seat width direction outer surface of the back frame, a front wall extending continuously in the seat width direction continuously from the front end side of the body wall, and And a rear wall continuously extending inward in the sheet width direction from the rear end side,
The front wall is attached to the front of the back frame, and the rear wall is attached to the back of the back frame.
The second member is
It is joined to the sheet width direction outside surface of the body wall,
The vehicle according to any one of appendices 2 to 9, characterized in that the main body wall is disposed at a height overlapping the position where the front wall and the rear wall are provided in the vertical direction. Sheet.

According to the invention as set forth above, the first member and the second member which are interposed between the assembling portion and the assembled member for assembling the assembled member and are joined to each other, and the first member Since the positioning member for positioning the two members is provided, the assembling operation of the first member and the second member functioning as the connecting member is facilitated by the positioning member.
Further, the assembled member is attached to the side of the first member in contact with the second member, and the positioning member is inserted into the hole from the side opposite to the side of the contact of the first member. Therefore, for example, in the state where the positioning member is temporarily assembled in each hole of the first member and the second member, the assembled member can be assembled from the side opposite to the positioning member side, suppressing interference with each other The main assembly operation can be facilitated.
Furthermore, the positioning member includes a first fitting portion that fits into the hole of the first member, and a second fitting portion that fits into the hole of the second member and has a narrower cross-sectional area than the first fitting portion. Part of the first fitting portion is melted and joined to the second member in a single welding process by welding from the opposite side to the second member contact surface side of the first member. Since part of the first member melts and is joined to the second member, the assembling work of these members becomes easy, the assembling accuracy is improved, and the assembling cost can be reduced. Moreover, since welding is performed from the side opposite to the assembled member contact surface side of the first member, interference with the assembled member can be suppressed, and the assembling operation is further facilitated.
And since the rigidity of the 1st member and the 2nd member which function as a connection member for connecting a member to be assembled with a seat frame is improved by the above-mentioned welding, the attachment rigidity of a member to be assembled to a seat frame can be improved. .
Therefore, it is possible to provide a vehicle seat that facilitates the assembling operation while improving the mounting rigidity of the assembled member to the seat frame in the manufacturing process.

According to the invention which concerns on the above-mentioned addition, while improving the attachment rigidity of the reclining device with respect to a back frame in a manufacturing process, the attachment operation can be made easy.
According to the invention pertaining to the above-mentioned supplementary notes, by providing the side frame portion made of a resin material, it is possible to achieve weight reduction for improving the fuel efficiency of the vehicle, and as described above, the first member and the first member functioning as a connecting member By providing two members, the rigidity of the side frame portion and the mounting rigidity of the reclining device can be improved.
According to the invention concerning the above-mentioned addition, compared with the case where a reclining device is directly attached to a back frame, the attachment nature of a reclining device to a back frame improves by interposing a connecting bracket to which a spring stop member was joined. The mounting accuracy is also improved.

According to the invention pertaining to the above-mentioned additional description, in the step of welding from the back frame contact surface side of the first member, the first member to be welded and the first fitting portion of the positioning member form a flat surface The welding conditions of the first member and the positioning member can be made uniform, and welding can be facilitated in a single step.
According to the invention relating to the above-mentioned appendage, since welding deformation is small compared to other welding and welding with deep penetration is possible, the joint portion after laser welding forms a flat surface without forming unevenness. Therefore, the subsequent assembly work of the component parts and the assembly accuracy can be improved. Moreover, since there is little welding deformation, the enlargement of the vehicle seat can be suppressed.
According to the invention pertaining to the above-mentioned supplementary note, even if the second member and a part of the reclining device are disposed at the overlapping position for the purpose of compacting the seat, the contact surface side of the reclining device among the first members Since it welds from the opposite side, it can control that a reclining device interferes at the time of welding.

According to the invention pertaining to the above-mentioned supplementary notes, the positioning member functions as positioning when attaching the first member to the back frame, and can also perform the function of enhancing the connection rigidity between the back frame and the first member.
According to the invention as set forth above, the second positioning member for positioning the first member with respect to the back frame is provided, and the first member and the second member are joined in one welding step, and the first Not only the positioning member and the second member are joined, but also the first member and the second positioning member are joined, so the assembling work of these members becomes easier, the assembling accuracy is improved, and the assembling cost is increased. It can be lowered.
According to the invention pertaining to the above-mentioned supplementary notes, the first member holds the back frame in the seat longitudinal direction, and the rigidity of the back frame and the mounting rigidity of the reclining device are improved.
In addition, since the second member is joined to the portion of the first member having relatively increased rigidity, the mounting rigidity of the reclining device engaged with the second member is further improved.

<< Vehicle seat according to another example including a seat cushion suitable for holding the skin terminal >>
The skin terminal of the skin material covering the seat cushion is normally fixed in a manner such that it is hooked on a hooking wire bridged on the seat cushion or a cushion spring bridged in the seat width direction.
In particular, Japanese Utility Model Laid-Open Publication No. 6-15599 discloses a device in which a seat cushion is covered with a skin material by holding a slit formed on the skin end on a spring installed in the seat cushion.

However, when the skin end is to be held by the wire, a wire for holding must be newly attached to the seat cushion, and as described in Japanese Utility Model Laid-Open Publication No. 6-15599, the skin end is fixed to the cushion spring. In the case of holding, since the cushion spring is detached or wobbled at the time of holding, the workability is low and the productivity of the seat cushion is low.
As another general problem, weight reduction of each vehicle component has been required in order to improve the fuel efficiency of the vehicle.

As another problem, when the connecting shaft is rotatably provided between both side frames of the cushion frame, the skin material does not contact the connecting shaft in order to realize smooth rotation of the connecting shaft. It was necessary to hook the skin terminal to the cushion frame.

In addition, in the case where the volume of the component members of the cushion frame is simply reduced with an emphasis on fuel efficiency improvement and material cost reduction, the rigidity required for the cushion frame may not be maintained.

In the following, the invention relates to a seat cushion and a seat for a vehicle according to an embodiment as a second configuration example, which has high productivity, can stabilize the fixing of the skin terminal, and is reduced in weight. The sheet S will be described.

(About the hooking of the skin material)
The central portion of the surface material 1b is attached to the surface of the cushion pad 1a by an adhesive or the like. Further, as shown in FIG. 17, a strip-like trim cord 9a made of a resin material is sewn along the periphery of the skin terminal 1ba by the suture thread 9b on the skin terminal 1ba which is the rear end of the skin material 1b. ing. Here, FIG. 16 is a perspective view showing a trim cord 9a stitched to the back skin 1b of the seat cushion 1 and the back skin 1b of the seat. FIG. 17 is a cross-sectional view taken along the line XVII-XVII of the seat cushion 1 of FIG. 1, and is a schematic cross-sectional view showing a hooking portion of the surface material 1b and the cover 4g.

The trim cord 9a corresponds to a mounting portion in the appendage described later, is for attaching the skin terminal 1ba to the hooking piece 4k described later, is made of an elastic resin material, and has a substantially J-shaped cross section. The trim cord 9a extends in the sheet width direction along the skin terminal 1ba and is formed slightly shorter than the sheet width direction length of the central portion 4ic of the front notch 4i described later.
One end side of the trim cord 9a is sewn to the skin terminal 1ba, and the other end has a hook 9c formed by being folded like a tip of a fishing hook. The trim cord 9a is inserted through a central portion 4ic of a front notch 4i of a frame connecting portion 4e described later from the front toward the rear. The hook 9c is disposed at the rear of a hooking piece 4k, which will be described later, facing the lower side of the front notch 4i. The trim cord 9a is attached to the hooking piece 4k so as to sandwich the hooking piece 4k described later between the hook 9c and the base end, and the attached state is maintained by elasticity. Even if a force is applied to the surface material 1b in the pulling direction of the trim cord 9a, the hook 9c is hooked to the upper end 4ka of the hooking piece 4k described later, from the cover 4g, that is, cushion frame F1. It is prevented that the surface material 1b from is removed.

(About the composition of the cushion frame)
Next, the structure of the cushion frame F1 including the frame connecting portion 4e to which the trim cord 9a is latched will be described with reference to FIGS. 2, 18 and 19. FIG.
FIG. 18 is a top view of the seat frame F shown in FIG. Furthermore, FIG. 19 is a rear perspective view showing a part of the back frame F2 and the frame connection part 4e.

The cushion frame F1 includes left and right side frame portions 4c provided on both sides in the width direction of the seat, a front frame portion 4d provided in front of the seat, and a frame connecting portion 4e connecting the left and right side frame portions 4c. It has a substantially rectangular frame body. The cushion frame F1 is made of a resin material such as glass fiber-filled polypropylene (PPG), and is molded by an injection molding method or another molding method. The cushion frame F1 is configured to be slidable in the seat longitudinal direction with respect to a vehicle body floor (not shown) by the slide rail device 5 shown in FIGS. As shown in FIG. 17, the slide rail device 5 is composed of a lower rail 5l fixed to the vehicle floor and an upper rail 5u slidable in the front and back direction of the seat with respect to the lower rail 5l.

The side frame portions 4c are disposed left and right and extend in the front-rear direction, and the width of the vehicle seat S is defined by the distance between the left and right. The left and right side frame portions 4c are provided with a rear side plate spring 7 and a front side plate spring 8 provided on the front and rear sides. More specifically, the

side fixing portions

7a and 8a of the rear side plate spring 7 and the front side plate spring 8 are fixed. It is done. Specifically, the rear plate spring 7 has a frame-like support 7c at the center. The lateral fixing portion 7a is formed to have a narrower width in the seat longitudinal direction than the frame shaped support portion 7c.

As shown in FIG. 18, the front frame portion 4d is slightly inclined in the direction opposite to the back frame F2 side, and is integrally formed with the side frame portion 4c on both sides, in the vicinity of the thighs of the seated person Support.

In particular, the corners 4da on both sides of the front frame portion 4d are formed in a large rounded and R-chamfered shape. By forming the corners 4da on both sides not in an angular shape but in a large rounded shape, the material is saved by the volume integral of the chamfered portion, and the weight reduction of the front frame portion 4d is realized. Furthermore, in the operation of fixing the slide rail device 5 provided below the cushion frame F1 to the vehicle floor (not shown) by a bolt passing through the fixing hole 5a, the working space above the slide rail device 5 is Workability is improved because only the chamfered portion can be widened. Furthermore, in the process of covering the surface material 1b on the upper surface, the front surface and the outer surface of the front frame portion 4d and fixing the surface material 1b to the lower surface or the inner surface, wrinkles are less likely to occur in the surface material 1b at the corners 4da. Is good.

The frame connecting portion 4e is provided on the rear side of the seat, and extends substantially perpendicular to the sheet width direction, in other words, the extending direction of the left and right side frame portions 4c, and both ends are the left and right side frame portions 4c. Is integrally connected to the The frame connecting portion 4e is composed of a cylindrical connecting shaft 4f extending in the seat width direction and a cover 4g which covers a part of the connecting shaft 4f.

The connection shaft 4f is formed in a pipe shape and is connected to a high link (not shown), and both ends thereof are rotatably supported by the left and right side frame portions 4c.

Both sides of the cover 4g are integrally connected to the left and right side frame portions 4c. The cover 4g has a hooking piece 4k (described later) to which the trim cord 9a is hooked and which will be described later on the front side, and a cover upper part 4h described later for separating the cushion pad 1a mounted on the cushion frame F1 from the connecting shaft 4f On the upper side.

In addition, as shown in FIG. 2, FIG. 17 and FIG. 18, the cover 4g is on the front side, and extends upward in the sheet width direction facing upward to the hooking piece 4k described later A notch 4i is provided, and a rear notch 4j extending in the sheet width direction is provided on the rear side across the cover upper portion 4h described later from the front notch 4i as shown in FIGS.

The front notch 4i extends in the sheet width direction with a predetermined width, and includes a central portion 4ic and both end sides 4is. Both end sides 4is of the front side notch 4i are formed narrower than the central portion 4ic, and lower edges of the both end sides 4is are formed higher than lower edges of the central portion 4ic.

By forming the front side notch 4i in the cover 4g in this manner, a step between the central portion 4ic and the both end sides 4is is formed. For this reason, in a state in which the trim cord 9a passing through the central portion 4ic from the front to the rear is latched to the hooking piece 4k described later with a constant tension, the trim cord is cut by the step between the central portion 4ic and the both ends 4is. The movement of the sheet width direction 9a is restricted.
That is, the trim cord 9a is maintained in the state of being latched to the latching piece 4k described later by the cover 4g having the front side notch 4i.

The cover 4g has the front side notch 4i and the rear side notch 4j, and the material cost can be reduced by being formed of a small amount of material.
Further, as described above, the front notch 4i and the rear notch 4j are formed by injection molding or the like by forming the cushion frame F1 including the cover 4g, so that the cover 4g is formed without being separately processed. It will be formed. Therefore, it is not necessary to hold the skin material 1b on a spring with low mounting stability, and there is no need to prepare a separate wire (not shown) for holding the skin material 1b. Furthermore, no new work such as pressing for forming the hooking portion is required. For this reason, it is easy to hold the surface material 1b, and the workability is improved.

The hooking piece 4k corresponds to a hooked portion in the supplementary note described later, and the hook 9c of the trim cord 9a is hooked as described above. The hooking piece 4k is on the lower side facing the front side notch 4i, and as shown in FIG. 17A, protrudes downward with respect to the connecting shaft 4f and is formed to extend in the sheet width direction.
Specifically, the hooking pieces 4k are concentric with the cross-sectional center of the connecting shaft 4f and partially overlap the cover upper portion 4h described later, and the side cross-sections of the cover 4g are the front notch 4i and the rear side notch The virtual circle C is formed to project downward with respect to a virtual circle C assumed to be a circle without 4 j.
Furthermore, the base end side of the trim cord 9a is in contact with the lower end 4kb of the hooking piece 4k. In this manner, the trim cord 9a is in contact with the lower end 4kb of the hooking piece 4k, thereby separating the skin material 1b sewn to the trim cord 9a from the rotating connection shaft 4f, and these abutments To prevent smooth rotation of the connecting shaft 4f.
The same effect can be achieved even with the skin material 1b that is not in contact with the trim cord 9a but in contact with the lower end 4kb of the hooking piece 4k.

Furthermore, the hooking piece 4k is formed such that its lower end 4kb is disposed above the upper rail 5u. The hooking piece 4k is formed in this manner, so that the slide rail device 5 including the upper rail 5u does not get in the way when hooking the skin material 1b to the hooking piece 4k. Efficiency can be improved. In addition, since the lower end 4 kb of the hooking piece 4 k is disposed above the upper rail 5 u in this way, a space for the passenger's foot or the like behind the seat can be secured below the hooking piece 4 k. , You can make the ride of the vehicle comfortable.

The cover upper portion 4h is on the opposite side of the hooking portion 4k with the front notch 4i interposed therebetween, is formed spaced apart from the connecting shaft 4f by a predetermined distance, and extends in the sheet width direction. Both sides are integrally connected to the side frame portion 4c.
Furthermore, the cover upper portion 4h is located in the side cross sectional view of the seat cushion 1 shown in FIG. 17A, along the virtual circle C which is a large diameter circle concentric with the cross section center of the connecting shaft 4f. It extends to the side. The rear edge 4 ha facing the rear notch 4 j does not protrude from the imaginary circle C.

On the other hand, in the cover upper portion 40h shown in FIG. 17B for the purpose of contrasting the shape, in the side cross sectional view of the seat cushion 1 shown in FIG. It is formed.

Here, in order to hold the surface material 1b, the operator first pulls the surface terminal 1ba from the front to the rear above the cover upper portion 4h to move downward along the rear edge of the cover upper portion 4h. This is done by pulling the trim cord 9a on the hooking piece 4k after pulling and then pulling back from the rear to the front.

Thus, in the state where the skin terminal 1ba is held by the holding piece 4k, as shown in FIG. 17A and described above, the cover upper portion 4h is formed on the virtual circle C, whereby the cushion pad 1a is The force applied to the rear end portion of the cover upper portion 4h via the upper surface can be suppressed smaller than that of the cover upper portion 40h shown in FIG. For this reason, it is possible to effectively maintain the tension of the surface material 1b after use over time.
In addition, as shown in FIG. 19, the cover 4g is integrally formed with the side frame portion 4c on the rear side of the seat where the cover upper portion 4h is located, so that the cover material 1b is folded back to make the cover material 1b larger. The rigidity of the rear side of the cover 4g to which a load is applied can be enhanced. Further, by forming the cover 4g in this manner, the skin material 1b and the connecting shaft 4f are separated at the position where the skin material 1b is folded back, and the connection shaft 4f is made smooth by preventing contact between the two. It will work.

(Reinforcement section)
Next, a harness mounting plate 4m that functions as a reinforcing portion of the cover 4g in addition to functioning to attach the unshown harness to the cushion frame F1 will be described with reference to FIGS. FIG. 20 is a top perspective view showing the harness mounting plate 4m shown in the XX part of FIG. 18 in an enlarged manner.

The harness mounting plate 4m is integrally formed substantially vertically on the front surface of the cover 4g and the inner side surface of the side frame 4c at the connecting portion between the both sides of the cover 4g and the side frame portion 4c, and the direction parallel to the seating surface It is formed of The harness mounting plate 4m is integrally formed on the front surface of the cover 4g and the inner side surface of the side frame portion 4c, and thereby functions as a reinforcing portion that enhances the rigidity of the cover 4g.
That is, although the cover 4g has the front side notch 4i and the rear side notch 4j, the rigidity is lower than that of the case without the notch, but the cover 4g is integrally formed with the side frame portion 4c by the harness mounting plate 4m. Thus, predetermined rigidity can be secured.

In particular, since the harness mounting plate 4m is formed substantially perpendicularly to both the front surface of the cover 4g and the inner side surface of the side frame portion 4c, the direction of the surface including the cover 4g and the side frame portion 4c (the surface of the seating surface Stiffness against load in the
Therefore, the harness mounting plate 4m is particularly suitable for complementing the rigidity weakened by the front side notch 4i and the rear side notch 4j formed on the front and back of the cover 4g.

Further, the harness mounting plate 4m is disposed in the vicinity of the side fixing portion 7a without extending to a position overlapping with the frame shaped support portion 7c of the rear plate spring 7 in the seat width direction. As described above, since the width of the side fixing portion 7a in the longitudinal direction of the seat is narrower than that of the frame-like support 7c, the harness mounting plate 4m and the frame-like support 7c do not interfere with each other. It is possible to suppress an increase in size in the front-rear direction of F1.

According to the vehicle seat S provided with the seat cushion 1 and the seat cushion 1 according to the above embodiment, it is possible to reduce the weight of the cushion frame F1 and the vehicle seat S, and hooking the skin terminal to the cushion frame F1. It becomes easy to stop and increase productivity.

The seat cushion 1 and the vehicle seat S according to the above-described embodiments are merely examples for facilitating the understanding of the present invention, and the present invention is not limited thereto. The present invention can be modified and improved without departing from the gist thereof, and the present invention naturally includes the equivalents thereof.

For example, in the skin material 1b, the trim cord 9a sewn to the skin terminal 1ba is described as being held by the cover 4g through the front notch 4i, but in addition to the trim cord 9a You may make it hang on.

Although the connecting shaft 4f is described as being supported by the side frame portion 4c so as to be rotatable at both ends, it is fixedly supported when it is not connected to the height link. May be In this case, the connecting shaft 4f may be formed with a notch for retaining the skin material.
Furthermore, although it has been described that the frame connecting portion 4e is constituted by the separate connecting shaft 4f and the cover 4g, the connecting shaft 4f and the cover 4g may be integrally formed. Good.

Moreover, although the trim cord 9a sewn to the outer-skins terminal 1ba was demonstrated as what is latched by the latching piece 4k through the front side notch 4i of the cover 4g, it is not limited to this structure. For example, instead of forming the front notch 4i in the cover 4g, a protruding portion may be formed so as to project beyond the other portion, and the skin terminal or the trim cord may be latched on this protruding portion.

Furthermore, although the cushion frame F1 is described as being made of a resin material, it may be made of a metal material or a combination of a resin and a metal. In addition, although the cushion frame F1 is described as being constituted by the side frame portion 4c integrally formed, the front frame portion 4d, and the frame connecting portion 4e, only the side frame portion 4c and the frame connecting portion 4e are described. May be integrally formed.

The invention embodied in the second configuration example may be described as the following supplementary notes.
(Supplementary Note 1)
Cushion frame,
A cushion pad provided on the upper side of the cushion frame;
A seat cushion used for a vehicle seat, comprising: a skin material covering an outer surface of the cushion pad;
The cushion frame has left and right side frame portions disposed on both sides of the seat, and a frame connecting portion disposed on the seat rear side of the seat cushion and connecting the left and right side frame portions.
The frame connecting portion includes a connecting shaft rotatably supported by the side frame portion, and a cover integrally formed on the left and right side frame portions and covering at least a part of the connecting shaft. ,
The cover is integrally formed with the side frame portion and has a hooked portion on the front side,
A seat cushion characterized in that a mounting portion of a skin terminal located on a seat rear side of the skin material is provided on a peripheral edge of the cover and is latched on the hooked portion.

(Supplementary Note 2)
The cover has a notch and
The seat cushion according to claim 1, wherein the attachment portion of the skin terminal is hooked to the hooked portion through the notch.

(Supplementary Note 3)
The seat cushion according to

Additional Note

1 or 2, wherein the hooking portion is formed so as to protrude downward from the connection shaft.

(Supplementary Note 4)
The seat cushion according to claim 2, wherein the cover is formed such that an upper end of the hooked portion facing the notch is closer to the connection shaft than a lower end.

(Supplementary Note 5)
The seat cushion according to

appendix

2 or 4, wherein the notch extends in the seat width direction in the cover.

(Supplementary Note 6)
The seat cushion according to Additional Note 5, wherein the notches are formed such that both end sides in the extending direction are narrower than the central portion.

(Appendix 7)
The notch is a front notch on the seat front side of the cover,
The cover has a rear side notch on the rear side of the seat,
The edge on the seat rear side of the cover and facing the rear notch is concentric with the center of the cross section of the connection shaft including the portion other than the edge on the cover, and the diameter is larger than that of the connection shaft The seat cushion according to any one of

appendices

2, 4 to 6, characterized in that it is formed on an imaginary circle that is the inside of the imaginary circle or inside the imaginary circle.

(Supplementary Note 8)
The second aspect of the present invention is characterized in that the cover is integrally formed with the side frame portion on the sheet rear side which is the opposite side across the notch with respect to the side of the hooked portion. Seat cushion according to any of the.

(Appendix 9)
The cushion frame further comprises a cushion spring,
The seat cushion according to any one of appendices 1 to 8, wherein the hooking portion is formed below the cushion spring.

(Supplementary Note 10)
The seat according to any one of appendices 1 to 9, characterized in that the cushion frame includes a reinforcing portion integrally formed between an end side of the cover in the seat width direction and the side frame portion. cushion.

(Supplementary Note 11)
A vehicle seat provided with the seat cushion according to Appendix 1.

According to the invention pertaining to the above-mentioned supplementary note, the cover member is formed on the cover of the frame connection portion connected to the side frame portion, and the skin terminal is held on the cover member. Since the cover to which the cover is hooked is connected to the side frame portion, the cover is provided with high rigidity, and the hooking of the skin material can be stabilized to enhance the productivity.
In addition, the cushion frame can be reduced in weight by reducing the volume of the cover as the notch is formed in the cover.
Furthermore, since the hooking portion protrudes downward further than the connecting shaft, the skin material comes into contact with the hooking portion, whereby the skin material is separated from the connecting shaft, and the skin member and the connecting shaft Can be avoided, and smooth rotation of the connecting shaft can be realized.

Further, the upper end of the cover facing the notch of the hooked portion is closer to the connecting shaft than the lower end, and the distance between the upper end of the cover and the connecting shaft is narrowed, so that the cover is latched through the notch. The operating range of the skin terminal (trimmed cord) can be limited to reduce the probability of releasing the latch, and the stability of the latch can be enhanced.

In addition, since the notch extends in the sheet width direction in the cover, the skin terminal can be easily passed through the notch, and the workability of the latching becomes good.

Furthermore, by forming the both end sides in the extending direction of the notch narrower than the central portion, the skin terminal hooked to the frame connecting portion through the central portion of the notch has the width of the seat cushion. It becomes difficult to shift in the direction, and the latch of the skin terminal is stabilized.

In addition, the edge on the rear side of the sheet in the rear notch is formed on the imaginary circle or inside the imaginary circle, so the edge does not protrude from the other cover portion, and the skin material is In a state where the cover is folded back to the peripheral edge on the rear side and latched on the front side of the cover, the force applied from the skin material to the edge of the cover on the rear side can be reduced. For this reason, the skin material can be folded back to the front side from the cover to be stably latched.

In addition, the cover is integrally formed with the side frame portion on the sheet rear side which is the opposite side across the notch with respect to the hooked portion side, so that the skin material is folded back from the skin material The rigidity on the rear side of the cover to which a large load is applied can be enhanced, and the skin can be separated from the connection shaft on the sheet rear side of the cover where the skin material is folded back, and the connection shaft can be operated smoothly.

Moreover, when the hooked portion is formed below the cushion spring, the cushion spring does not disturb when passing the skin terminal (trim cord) through the notch facing the upper surface of the hooked portion Therefore, it is possible to enhance the efficiency of the operation of retaining the skin material.

Furthermore, the cushion frame includes a reinforcing portion (a harness mounting plate or the like) integrally formed between the frame connection portion and the side frame portion, thereby forming a notch in the frame connection portion. It can compensate for the decrease in rigidity of the frame.

In addition, when the vehicle seat includes the seat cushion, the above-described effects exerted by the seat cushion can be enjoyed by the vehicle seat.

As described above, in the embodiment according to the present invention and the configuration example, although the vehicle seat used for the automobile has been described as a specific example, the present invention is not limited to this, other than vehicle seats such as trains and buses, It can also be used as a seat for vehicles such as airplanes and ships.

S Vehicle Seats 1

Seat Cushions

1a, 2a,

3a Cushion Pads

1b, 2b, 3b Skin Material 1ba Skin Terminal 2 Seatback 3 Headrest 4c Side Frame 4d Front Frame 4da Corner 4e Frame Link 4f Link Shaft 4g Cover 4h, 40h Cover upper part 4ha, 40ha edge 4i front notch 4ic central part 4is both ends 4j back notch 4k hooking piece (hanging part)
4ka upper end 4kb lower end 4m harness mounting plate (reinforcement)
Reference Signs List 5 slide rail device 5a fixing hole 5l lower rail 5u upper rail 6 height adjustment device 7 rear side leaf spring 7a side fixing portion 7c frame-like support 8 front side leaf spring 8a side fixing portion 9a trim cord (mounting portion)
9b suture thread 9c hook 10 passenger support member 10a lower end fixing portion (fixed portion)
10b Upper end fixing part (fixed part)
11 Spring Locking Part F Seat Frame F1 Cushion Frame F2, F3 Back Frame fa, fb Front Frame Piece fh Through Hole fj Pillar Part fk Upper Frame Part fs Front Side Frame

20a Extension Part

20b Inner Part

20c Front Part

20d Outer Part

20e , 20f projection (second projection)
fc front frame piece fsa front side frame 20g lower frame part 20h inner part 20i front part 20j outer surface ra, rb rear frame piece rh through hole rj pillar part rk upper frame part rs rear side frame 21a lower frame part 21b

outer Portions

21c and 21d protrusion (first protrusion)
rc back frame piece 21e extension 21f side frame part 21g frame back wall F4 back frame fx front frame piece 22a back face 22a inner part 22c front part 22d outside part rx back frame piece rsa back side frame 23a lower frame Portion 23b Outer portion 26c Positioning hole portion 30 Reclining device 31 Reclining device body 32 Housing case 32a Outer case piece 32b Inner case piece 32c Fitting projection 33 Engaging gear 34 Lock gear portion 35 Sliding lock member 36 Path defining portion 37 Cam surface 38 cam body 39 spring 40 rotating shaft 41 spiral spring 41a one end 41b other end 42

operation lever

43, 44, 45, 400, 410 adhesive 50 connection bracket 51 main body wall 51a shaft hole 51b fitting hole 51c 1 hole 51 d second hole 52 front wall 53 rear wall 54 recess 60 spring locking member 61 spring locking portion 62 mounting portion 62 a

first hole

70, 80 positioning pin 71 first fitting portion 72 second

Fitting part

73, 81 Frame fitting part 82 Contact part C Virtual circle J Headrest pillar Pa Positioning pin Pb Stopper SF Side frame T jig

Claims

A seat back frame used for a vehicle seat,
A rear frame piece on the rear side of the seat and a front frame piece connected to the front side of the rear frame piece;
The rear side frame piece and the front side frame piece have left and right side frame portions which are disposed in the side of the seat and extend in the longitudinal direction of the seat whose upper ends are connected to each other,
The left and right side frame portions of one of the front frame piece and the rear frame piece have flexibility in the sheet width direction,
A seat back frame characterized in that the left and right side frame portions of both the rear side frame piece and the front side frame piece are overlapped and joined in a seat width direction.
The seat back frame according to claim 1, wherein one of the front frame piece and the rear frame piece is formed such that lower sides of the left and right side frame portions are separated in the seat width direction.
An occupant support member made of an elastic material and supporting an occupant is fixed to the other of the front frame piece or the rear frame piece by its elasticity,
The seat back frame according to claim 1 or 2, wherein one of the front frame piece or the rear frame piece is formed to avoid a fixed portion of the passenger support member.
The one of the front frame piece or the rear frame piece has an extending portion extending inward in the sheet width direction from the lower end side of both the left and right side frame portions,
The seat back frame according to claim 3, wherein the extension portion extends to a length that does not reach the fixed portion of the occupant support member.
The other of the front frame piece or the rear frame piece has a lower frame portion connecting lower end sides of the left and right side frame portions,
The lower frame portion is formed with a first protrusion which extends in the sheet width direction and protrudes in a forward direction of the sheet.
The extension portion has a second protrusion protruding to protrude forward in the same manner as the shape of the first protrusion, and extends to a position overlapping the first protrusion,
5. The seat back frame according to claim 4, wherein the first protrusion and the second protrusion are joined in the front-rear direction of the seat at mutually overlapping positions.
The seat back frame according to claim 4 or 5, wherein an adhesive is interposed between the front frame piece or the other of the rear frame pieces up to the end of the extension. .
The seat back frame according to any one of claims 1 to 6, wherein the rear side frame piece and the front side frame piece are formed of a resin material.
In each of the rear side frame piece and the front side frame piece, through holes through which positioning pins are inserted are formed at the portions facing each other in the overlapped state,
The vicinity of the edge of the through hole of any one of the rear side frame piece and the front side frame piece bulges out to the other side of the rear side frame piece and the front side frame piece more than the periphery, The seat back frame according to any one of claims 1 to 7, wherein the peripheries are spaced apart.
The seat back frame according to any one of claims 1 to 8, wherein the rear side frame piece and the front side frame piece are combined to form a closed cross-sectional structure.
A plurality of the first protrusions are formed,
The seat back frame according to claim 5, wherein the plurality of first protrusions and the extension are separated from each other.
A vehicle seat comprising the seat back frame according to claim 1.
Preparing the front frame piece and the rear frame piece of the seat back frame according to claim 1;
Bending the lower end side of the one of the left and right side frame portions in the sheet width direction,
The one left and right side frame portions are disposed on the extension in the seat width direction of the other left and right side frame portions of the front frame piece or the rear side frame piece,
The left and right side frame portions of the front frame piece or the rear side frame piece are overlapped in the sheet width direction by releasing the bent state of the left and right side frame portions, and the left and right side frame portions are overlapped. A method of manufacturing a seat back frame, comprising bonding to a part.