JP2020040507A - Vehicle seat - Google Patents

Abstract

To provide a vehicle seat which achieves improvement of attachment rigidity of a wire member while securing simple attachment workability.SOLUTION: A vehicle seat includes: a back frame 10 serving as a framework of a backrest part; an attachment bracket 17 which is disposed on an outer surface as seen in a seat width direction of the back frame 10 and attached to a lower end portion of the back frame 10; and a wire member 60 attached to the lower end portion of the back frame 10 and the attachment bracket 17. The wire member 60 has: an inner end part disposed at the inner side as seen in the seat width direction and attached along an outer surface of a lower end of the back frame 10; and an outer end part disposed at the outer side as seen in the seat width direction and attached to the outer surface as seen in the seat width direction of the attachment bracket 17.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vehicle seat, and more particularly to a vehicle seat characterized in that a wire member for fixing a child seat is attached to a seat frame.

  2. Description of the Related Art Conventionally, there has been known a vehicle seat in which a wire member (anchor member) for fixing a child seat is attached to a back frame or a cushion frame serving as a seat skeleton, and the rigidity of the wire member is improved. Various ideas have been devised for this purpose.

For example, in a vehicle seat described in Patent Literature 1, a U-shaped wire member for fixing a child seat is attached to a rear end of a cushion frame.
Specifically, the wire member is fixed to a connecting pipe laid in the left-right direction at a rear end of the cushion frame, and is also joined to a flange portion formed at an upper end of the left and right cushion side frames. ing. With this configuration, the rigidity of the wire member is secured.
Also in the vehicle seat described in Patent Literature 2, an anchor member for fixing the child seat is fixed to the connection pipe at the rear end of the cushion frame via a bracket.

JP 2009-202788 A JP 2014-151660 A

However, in the vehicle seat as described in Patent Document 1, the wire members are joined to the seat frame at a plurality of locations.
Therefore, a vehicle seat capable of improving the mounting rigidity of the wire member while ensuring simple mounting workability has been desired.

Further, in a vehicle seat as disclosed in Patent Document 2, an anchor member is attached to a seat frame via a bracket separately.
Therefore, there has been a demand for a vehicle seat capable of suppressing weight increase and attaching a wire member in a relatively compact arrangement.

The present invention has been made in view of the above problems, and an object of the present invention is to improve the mounting rigidity of a wire member (particularly, a wire member for fixing a child seat) while ensuring simple mounting workability. It is an object of the present invention to provide a vehicular seat that has been made to work.
Another object of the present invention is to provide a vehicle seat capable of suppressing an increase in weight and mounting a wire member in a relatively compact arrangement.

According to the vehicle seat of the present invention, the object is to provide a back frame serving as a skeleton of a backrest portion, and an attachment disposed at an outer portion of the back frame in a seat width direction and attached to a lower portion of the back frame. A bracket, a wire member attached to each of the lower portion of the back frame and the mounting bracket, wherein the wire member is disposed inside the seat width direction and is attached to the back frame; And an outer end portion that is arranged outside in the seat width direction and is attached to an outer portion in the seat width direction of the mounting bracket.
As described above, the wire member is disposed on the inner side in the seat width direction, and is provided on the inner end portion attached to the lower portion of the back frame, and is disposed on the outer side in the seat width direction. Since it has an outer end to be attached, simple attaching workability can be ensured. Further, since the outer end of the wire member is arranged and attached to the outer portion of the mounting bracket, the wire member is relatively firmly attached to the mounting bracket.
Therefore, it is possible to realize a vehicle seat in which the attachment rigidity of a wire member (particularly, a wire member for fixing a child seat) is improved while securing simple attachment workability as compared with the related art.
Further, it is possible to realize a vehicle seat in which a wire member can be attached with a relatively compact arrangement while suppressing an increase in weight.

At this time, it is preferable that the mounting bracket is mounted on an outer surface of the back frame and connects the back frame to a support base provided on a vehicle body floor.
With the above configuration, the mounting bracket is a relatively rigid member that connects the back frame and the support base on the vehicle body floor, so that the mounting rigidity of the wire member mounted on the outer surface of the mounting bracket is improved.

At this time, the back frame includes a frame-shaped main frame made of a pipe material, the inner end is attached to a lower end of the main frame, and a seat front-rear direction is provided along an outer peripheral surface of the lower end. Preferably, the outer end portion extends in the seat front-rear direction along the outer surface of the mounting bracket.
As described above, since the inner end and the outer end of the wire member are attached so as to extend in the seat front-rear direction, respectively, when receiving a load from the outside in the seat front-rear direction, sudden start or sudden stop Therefore, the rigidity of the wire member can be secured against the load caused by the above.

At this time, the mounting bracket bends continuously from a side wall portion disposed outside the main frame in the seat width direction and one end of the side wall portion in the width direction, and extends to the front surface of the main frame. A front wall portion extending from the other end in the width direction of the side wall portion, and a rear wall portion extending to the rear surface of the main frame while facing the front wall portion. The front wall portion and the rear wall portion of the mounting bracket are preferably joined to the main frame.
Further, the side wall portion extends vertically along the main frame, and a portion of the side wall portion corresponding to the main frame in a seat vertical direction and a lower end portion to which the wire member is attached is provided. It is preferable that a bent portion bends inward in the seat width direction along the main frame.
With the above configuration, the mounting rigidity of the mounting bracket to the main frame is increased, and the mounting rigidity of the wire member is also increased.

At this time, a cushion frame serving as a skeleton of a seating portion is provided, and the cushion frame has a cushion side frame attached to the outside of the main frame in a seat width direction and constituting a side in the seat width direction. The end portion is preferably disposed in a gap formed between the mounting bracket and the cushion side frame in a seat width direction.
According to the above configuration, the wire member can be attached in a relatively compact arrangement. In the case of a vehicle seat having a reclining mechanism, a stable tilting operation of the seat back can be realized.

At this time, the main frame includes left and right side frame portions arranged on the side in the seat width direction, and a lower frame portion connecting lower ends of the left and right side frame portions, and the mounting bracket includes: It is attached to the outer side surface of the side frame portion, and the main frame is provided with a reinforcing bracket that connects the portion of the side frame portion to which the mounting bracket is attached and the lower frame portion. good.
With the above configuration, the rigidity of the back frame can be improved. In particular, when a relatively large load is applied in the front-rear direction of the seat, it is possible to suppress a possibility that the frame-shaped main frame made of the pipe material is twisted.

At this time, the reinforcing bracket is formed to have a substantially U-shaped cross-section, and a stepped portion bent to one side in the seat front-rear direction is provided around a portion of the reinforcing bracket attached to an end attached to the lower frame portion. It is good that it is formed.
With the above configuration, the rigidity of the back frame can be further improved. In addition, by attaching the reinforcement bracket around the corners of the main frame, the frame rigidity can be secured even if the main frame itself has a simple shape, resulting in weight reduction, cost reduction, and sharing of components Can be achieved.

At this time, the reinforcing bracket is continuously bent from a side wall portion arranged inside the frame shape of the main frame, and one end in the width direction of the side wall portion, and is provided on a front surface of the main frame. A front wall portion extending, a rear wall portion continuously bent from the other end in the width direction of the side wall portion and extending to the rear surface of the main frame while facing the front wall portion; The front wall portion and the rear wall portion are joined to the main frame, and at both end portions of the side wall portions close to the main frame, in order to avoid interference with the main frame. Is preferably formed.
With the above configuration, simple mounting workability can be realized. Further, it is possible to suppress the generation of abnormal noise due to the contact between the components during the running of the vehicle.

At this time, the back frame includes a plate-shaped panel frame disposed behind the seat of the main frame, and a portion of the panel frame facing the reinforcing bracket in the seat front-rear direction includes a rearward seat. Preferably, a concave reinforcing recess is formed.
With the above configuration, the rigidity of the panel frame can be improved, and the workability of attaching the reinforcing bracket can be ensured.

  ADVANTAGE OF THE INVENTION According to this invention, the seat for vehicles which improved the mounting rigidity of the wire member (especially the wire member for fixing a child seat) can be implement | achieved, securing simple installation workability compared with the former. Further, it is possible to realize a vehicle seat in which a wire member can be attached with a relatively compact arrangement while suppressing an increase in weight.

According to the invention, the rigidity of the wire member is improved. In particular, the rigidity of the wire member can be secured against a load applied from the outside in the front-rear direction of the seat or a load caused by sudden start or sudden stop.
Further, according to the invention, the mounting rigidity of the mounting bracket to the main frame is increased, and the mounting rigidity of the wire member is also increased.
Further, according to the invention, the wire member can be attached in a relatively compact arrangement. In the case of a vehicle seat having a reclining mechanism, a stable tilting operation of the seat back can be realized.

According to the invention, the rigidity of the back frame can be improved. In particular, when a relatively large load is applied in the front-back direction of the seat, the torsion of the frame-shaped main frame made of the pipe material can be suppressed.
Further, according to the present invention, it is possible to reduce the weight and cost of the back frame and to share components.
Further, according to the above-described invention, simple mounting workability is realized, and generation of abnormal noise due to contact between components during traveling of the vehicle can be suppressed.

It is an external appearance perspective view of the vehicle seat in this embodiment. It is an external appearance perspective view of the seat frame of a vehicle seat. It is a perspective view of a seat frame and is an enlarged view of a principal part. It is a front view of a seat frame and is an enlarged view of a principal part. It is a figure explaining the attachment state of a mounting bracket, a wire member, and a reinforcement bracket. It is a rear view of a seat frame, and is a principal part enlarged view. FIG. 6 is a sectional view taken along the line VII-VII of FIG. 4.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
This embodiment includes a back frame serving as a skeleton of a backrest, a mounting bracket disposed on an outer side surface of the back frame in the seat width direction, and mounted to a lower end portion of the back frame, a lower end portion of the back frame, and a mounting bracket. A wire member attached to the vehicle seat, wherein the wire member is disposed inside the seat width direction, and an inner end attached along the outer surface of the lower end of the back frame, and an outer end in the seat width direction. And an outer end portion attached to the outer surface of the mounting bracket in the seat width direction.
The side where the occupant sits with respect to the seat back of the vehicle seat is the front side.

The vehicle seat S of the present embodiment is a rear seat corresponding to, for example, a rear seat of the vehicle.
The vehicle seat S is, as shown in FIG. 1, mounted on a seat body including a seat back 1, a seat cushion 2, and a headrest 3, and as shown in FIG. A support leg 30 for supporting the seat cushion 2, a support base 40 for rotatably supporting the seat back 1, and an outer portion in the seat width direction of the seat back 1 are attached to switch the seat body from the used state to the stored state. And a switching device 50.
2 and 3, the vehicle seat S includes a wire member 60 attached to a lower end portion of the seat back 1 and serving as an anchor for connecting the child seat.
On the front side of the vehicle seat S, a concave storage floor (not shown) formed at a lower position than the vehicle body floor is provided.

The vehicle seat S is a seat in which at least two types of seat arrangements are possible: a use state in which an occupant can sit down and a storage state in which the seat body is stored on a storage floor.
Specifically, when the occupant pulls the operation lever 51 shown in FIG. 1 from the use state, the seat body falls down and folded, and the vehicle seat S is switched to the storage state stored in the storage floor. In addition, from the stowed state, the occupant manually returns the seat body upward to return to the use state.

As shown in FIG. 1, the seat back 1 is a backrest portion for supporting the back of the occupant from behind, and the cushion pad 1a is placed on a back frame 10 shown in FIG. It is configured to be covered.
The seat cushion 2 is a seating portion for supporting an occupant from below, and the cushion pad 2a is placed on a cushion frame 20, which is a skeleton shown in FIG. 2, and is covered with a skin 2b from above the cushion pad 2a. It is configured.
The headrest 3 is a head that supports the occupant's head from behind, and is configured by placing a cushion pad 3a on a headrest pillar (not shown) serving as a core material and covering the cushion pad 3a with a skin 3b.

The back frame 10 is formed of a substantially rectangular frame-like body serving as a skeleton of the seat back 1, and as shown in FIG. 2, a frame-shaped main frame 11 made of a pipe material and a frame-shaped main frame 11. A connection frame 12 for connecting an upper frame portion 11a constituting an upper portion of the main frame 11 and a lower frame portion 11b constituting a lower portion thereof; And a panel frame 13.
A retractor bracket 14 is attached to a substantially central portion of the panel frame 13 so that the connection frame 12 is sandwiched between the panel frame 13 and the front and rear direction of the seat. The retractor bracket 14 is a bracket for attaching a belt retractor (not shown) that winds up the seat belt, and is also a bracket for reinforcement.

On the front surface of the upper frame portion 11a of the main frame 11, a plurality of substantially flat surfaces are formed at predetermined intervals in the seat width direction. A pair of headrest guides 3c for supporting a headrest pillar (not shown) are attached to the portions where these substantially flat surfaces are formed.
A skin suspension wire 15 is attached to the lower end portion of the lower frame portion 11b of the main frame 11 by welding, and a pair of wire members 60 are provided at positions not overlapping the terminal portions of the pair of skin suspension wires 15. Are joined by welding.
More specifically, the wire member 60 on the left side of the seat is arranged outside the skin hanging wire 15 on the left side of the seat in the seat width direction, and the wire member 60 on the right side of the seat is located at both ends of the skin hanging wire 15 on the right side of the seat. It is arranged in the position sandwiched between.

In the frame of the main frame 11, a reinforcing bracket 16 that connects the lower end of the side frame 11c and the left end of the lower frame 11b is attached by welding.
As shown in FIGS. 2 and 3, left and right mounting brackets 17 for connecting to the support base 40 are attached to lower portions of outer side surfaces of the left and right side frame portions 11 c and 11 d of the main frame 11. ing. Further, a switching device 50 for switching the seat body from the use state to the storage state is attached to an upper portion of the outer side surface of the side frame portion 11c.

As shown in FIG. 2, the connection frame 12 is made of a long pipe material, and has a substantially flat surface that is partially crushed by press working at its upper end and lower end. These substantially flat surfaces are attached to the outer surface of the main frame 11 by welding.
The connecting frame 12 is attached to the right side of the seat width direction opposite to the left side to which the reinforcing bracket 16 is attached. Therefore, the rigidity of the back frame 10 is well-balanced in the seat width direction.

The panel frame 13 is a panel member having a substantially rectangular shape, and is attached to the upper, lower, left, and right frame portions of the main frame 11 by welding. Mounted by welding.
More specifically, as shown in FIG. 3, a frame mounting projection 13a (not shown) projecting toward the main frame 11 is provided at a predetermined position of a portion of the panel frame 13 that overlaps the main frame 11 in the front-rear direction of the seat. Are formed. The frame mounting projections 13a are welded in a state of contacting the respective frames.

The lower end portion of the panel frame 13 extends below the lower frame portion 11b and is provided so as to cover the skin suspension wire 15 and the wire member 60 from behind.
More specifically, the lower end portion of the panel frame 13 is bent and extends to the front of the seat, and covers the skin suspension wire 15 and the wire member 60 from behind and below.
Therefore, even when a load is received from the outside in the front-rear direction of the seat or when a load is received from below, the assembling rigidity of these members can be ensured.

As shown in FIGS. 3 and 7, a reinforcing recess 13 b that is recessed toward the rear of the seat is formed in a lower portion of the panel frame 13 at a portion facing the reinforcing bracket 16 in the seat front-rear direction.
As shown in FIG. 3, the reinforcing recess 13b has the same width as the reinforcing bracket 16, and extends along the direction in which the reinforcing bracket 16 extends. More specifically, the outer end in the sheet width direction extends to a position facing the rear surface of the side frame portion 11c, and the inner end portion extends to a position facing the rear surface of the lower frame portion 11b.
Therefore, the rigidity of the panel frame 13 can be increased, and a gap is formed, so that workability for mounting the reinforcing bracket 16 can be ensured. Further, it is possible to suppress the generation of abnormal noise due to the contact between the components during the running of the vehicle.

As shown in FIGS. 2 and 3, the skin suspending wire 15 is a wire for suspending a skin end portion of the seat cushion 2 or the seat back 1, and includes a wire main body 15 a extending in a seat width direction, and a wire. A pair of wire extensions 15b that bend continuously from the left and right ends of the main body 15a and extend upward, and a pair of wire extensions 15b that are continuously bent from the upper ends of the pair of wire extensions 15b and extend inward in the sheet width direction. It mainly comprises a pair of wire end portions 15c.
A substantially central portion of the wire main body 15a is welded to a lower end portion of the panel frame 13, and a pair of wire end portions 15c are welded to the bottom surface of the lower frame portion 11b.
Further, the one wire end portion 15c is disposed at a position corresponding to a portion of the lower frame portion 11b to which the reinforcing bracket 16 is attached in the seat width direction, in other words, at a position overlapping vertically.
With the configuration described above, the assembling rigidity of the skin suspension wire 15 is improved.

As shown in FIGS. 3 to 6, the reinforcing bracket 16 is a bracket for reinforcing the back frame 10, is formed in a substantially U-shaped cross section, and extends in a direction in which the connecting frame 12 extends (vertical direction). And the side frame portion 11c and the lower frame portion 11b are connected to each other.
More specifically, the reinforcing bracket 16 bends continuously from the widthwise front end of the side wall portion 16a disposed inside the frame of the main frame 11 and the side wall portion 16a. The front wall portion 16b partially extending to the front surface and the rear end portion in the width direction of the side wall portion 16a continuously bend and partially reach the rear surface of the main frame 11 while facing the front wall portion 16b. And a rear wall portion 16c extending therefrom.
The outer ends of the front wall portion 16b and the rear wall portion 16c in the seat width direction are welded to the main frame 11 (side frame portion 11c), and the front wall portion 16b and the rear wall portion 16c are provided. Is welded to the main frame 11 (lower frame portion 11b).

As shown in FIG. 3, cutouts 16 d for avoiding interference with the main frame 11 are formed at both end portions of the side wall portion 16 a of the reinforcing bracket 16, which is close to the main frame 11.
In other words, the front wall portion 16b and the rear wall portion 16c extend so as to partially protrude from the side wall portions 16a, respectively, and are in contact with the outer surface of the main frame 11. And these contact parts are joined and the welding mark is respectively formed.
As described above, both end portions of the reinforcing bracket 16 in the seat width direction are assembled so as to sandwich the main frame 11, and both end portions are joined by welding on both sides in the seat front-rear direction. Therefore, the rigidity is improved in the portion where the reinforcing bracket 16 is assembled and in the peripheral portion.

In the front wall portion 16b, a step portion 16e bent rearward in the front-rear direction of the seat is formed in a peripheral portion (specifically, a proximity portion) of an end portion attached to the lower frame portion 11b.
In other words, when the front wall portion 16b is divided into an upper portion and a lower portion with the step portion 16e as a boundary, the upper portion has a shape recessed rearward with respect to the lower portion.
According to the above configuration, when the seated person is seated, the frame portion of the reinforcing bracket 16 has a shape that does not hit the waist or the vicinity of the waist of the seated person, thereby improving the seating feeling and riding comfort of the seated person. be able to.

As shown in FIGS. 3 to 6, the mounting bracket 17 is made of a sheet metal member extending in the up-down direction, is formed in a substantially bow shape when viewed from the side of the seat, and the upper part of the mounting bracket 17 is a main frame. 11 is attached to the outer surface in the sheet width direction, and the lower end portion is attached to the inner surface of the support base 40.
More specifically, as shown in FIG. 5, the mounting bracket 17 has a substantially U-shaped cross section, and includes a side wall 17a disposed on the outer side surface of the main frame 11 in the seat width direction, and a width direction of the side wall 17a. Of the front wall 17b extending continuously from the front end of the main frame 11 and extending continuously from the rear end in the width direction of the side wall 17a while facing the front wall 17b. And a rear wall portion 17c extending to the rear surface of the main frame 11.
The side wall portion 17 a extends vertically along the main frame 11, and a lower end portion thereof is attached so as to be rotatable with respect to the support base 40. Further, the inner ends in the seat width direction of the front wall portion 17b and the rear wall portion 17c are joined to the main frame 11 (side frame portions 11c and 11d) by welding.

As shown in FIGS. 4 and 5, between the upper part of the mounting bracket 17 facing the main frame 11 in the vertical direction and the lower end part attached to the support base 40, the shape of the main frame 11 is formed. A bent portion 17d bent inward in the sheet width direction is formed along the width.
That is, a gap (space) is formed between a portion of the mounting bracket 17 where the bent portion 17d is formed and a component disposed outside the mounting bracket 17 in the seat width direction.
Therefore, the mounting rigidity of the mounting bracket 17 to the main frame 11 is increased, and the workability of assembling the mounting bracket 17 to the support base 40 is improved.

As shown in FIG. 5, a notch 17 e for avoiding interference with the reinforcing bracket 16 is formed in a portion of the mounting bracket 17 facing the outer end in the sheet width direction of the reinforcing bracket 16. .
In other words, the front wall portion 17b and the rear wall portion 17c partially extend inward in the seat width direction so as to cover the main frame 11 while avoiding a portion facing the outer end of the reinforcing bracket 16, respectively. The extending portions are joined to form welding marks.
Therefore, the workability of assembling and welding work of the reinforcing bracket 16 or the mounting bracket 17 is improved, and the rigidity is improved in a portion where these components are mounted and in a peripheral portion.

The upper end of the mounting bracket 17 is sandwiched between the back frame 10 (main frame 11) and the cushion frame 20 in the seat width direction, as shown in FIG.
As shown in FIGS. 3 and 4, the lower end of the left mounting bracket 17 is provided with a seat rotation shaft 18 that is supported by the support base 40 in the seat width direction, and the lower end of the right mounting bracket 17. As shown in FIG. 2, a reclining device 19 that rotatably connects the back frame 10 to the support base 40 is attached.

The reclining device 19 is a known device, and is mounted on the outer surface of the right mounting bracket 17 in the seat width direction as shown in FIG.
The reclining device 19 includes a spiral spring (not shown) that rotates the back frame 10 forward about the seat rotation shaft 18 to urge the back frame 10 to the stored state.
One end of the spiral spring is locked to the back frame 10 side, and the other end is locked to the support base 40 side.
The reclining device 19 operates when the locked state of the seat back 1 is released in accordance with the operation of the operation lever 51, and rotates the back frame 10 forward by the biasing force of the spiral spring to fold it toward the vehicle body floor. Can be.

  The cushion frame 20 is formed of a substantially rectangular frame-like body serving as a skeleton of the seat cushion 2, and as shown in FIG. 2, left and right side frames 21 disposed on the left and right sides, and a front portion of each side frame 21. , A central connecting pipe 23 that connects a substantially central portion of each side frame in the front-rear direction, a pan frame 24 as a plate-shaped frame that connects the front connecting pipe 22 and the central connecting pipe 23, It is mainly composed of

The side frame 21 is formed of a sheet metal member having a substantially U-shaped cross-section extending in the seat front-rear direction. Mounted on the side.
At the rear end of the left side frame 21, a cushion rotation device 26 that connects the cushion frame 20 to the back frame 10 so as to be rotatable about a cushion rotation shaft 27 is attached.

  As shown in FIG. 2, the front connection pipe 22 is formed of a substantially U-shaped pipe member, and has a support leg 30 on the inner surface in the seat width direction with respect to the cushion frame 20 about the leg rotation shaft 29. A leg rotation device 28 for rotatably connecting the two is mounted.

As shown in FIG. 2, the support leg 30 is a substantially U-shaped pipe member that supports the seat cushion 2, and includes a leg body 31 disposed on the left and right sides and a lower end of each leg body 31. And a leg connecting portion 32 for connection.
The upper end of the leg body 31 is connected to the central portion in the seat front-rear direction on the left and right inner side surfaces of the cushion frame 20. The center of the leg connecting portion 32 in the seat width direction is detachably held by a leg holding member (not shown) on the vehicle body floor.
The upper end of the support leg 30 projects forward of the seat from the lower end of the support leg 30, and is inclined upward and forward from the lower end of the support leg 30 toward the upper end of the support leg 30.

The support base 40 is a member that supports the seat back 1 and, as shown in FIGS. 2 and 3, is made of a substantially L-shaped sheet metal member that is long in the front-rear direction, and is disposed laterally in the seat width direction. And connected to the vehicle floor.
The support base 40 extends upward from the left and right outer ends of the connecting wall 41 and the connecting wall 41 connected to the upper surface of the vehicle body floor, and extends through the seat rotating shaft 18 to the lower end of the mounting bracket 17. And an outer wall portion 42 that is connected to the main body.

The switching device 50 is a known device for switching the vehicle seat S from the use state to the storage state, and is attached to an upper portion of the back frame 10 as shown in FIGS.
The switching device 50 includes an engagement hook detachably provided to an engagement striker (not shown) that is a part of a vehicle body member, and an engagement striker that moves a distal end portion of the engagement hook in a seat vertical direction. And an operation lever 51 for engaging and locking the lock.
The engaging hook is connected to the operating lever 51 via a cable (not shown). The operating lever 51 locks the engaging hook to the engaging striker. It is configured to be switchable.

When the occupant operates the operation lever 51 from the use state of the vehicle seat S, the locked state of the back frame 10 by the switching device 50 is released. The reclining device 19 operates in accordance with the release of the locked state of the seat back 1, and more specifically, the back frame 10 can be rotated forward and folded by the urging force of a spiral spring (not shown).
Further, the cushion rotation device 26 and the leg rotation device 28 respectively operate with the rotation operation of the back frame 10, and more specifically, the support leg 30 is moved by the urging force of the spiral spring (not shown) to move the leg rotation shaft 29. It can be folded by rotating it toward the cushion frame 20 as a center.
By the above series of operations, the seat body is stored on the storage floor, and the vehicle seat S is switched from the used state to the stored state.
In order to return the vehicle seat S from the stored state to the used state, the occupant lifts the seat body by hand against the urging force of a spiral spring (not shown) to engage the switching device 50. The back frame 10 may be switched to the locked state by engaging the hook with the engagement striker.

The wire members 60 are anchors for connecting the child seat, and are attached as a pair to the lower end of the main frame 11 at predetermined intervals in the seat width direction, as shown in FIGS. .
More specifically, as shown in FIG. 5, the pair of wire members 60 have a substantially U-shape, and extend from the wire main body 61 extending in the sheet width direction to the wire main body 61 from the inner end in the sheet width direction. It mainly comprises an inner end 62 which is bent and extends rearward of the seat, and an outer end 63 which is bent continuously from the outer end of the wire main body and extends rearward of the seat.

The inner end 62 of the left wire member 60 extends rearward of the seat along the outer peripheral surface of the lower frame portion 11b, and is in contact with the outer peripheral surface of the lower frame portion 11b. And the contact part is joined and the welding mark is formed.
The outer end 63 extends rearward along the outer surface of the mounting bracket 17 in the seat width direction, and is in contact with the outer surface. The contact portions are joined to form welding marks.
On the other hand, as for the right wire member 60 ′, the inner end 62 and the outer end 63 extend rearward along the outer peripheral surface of the lower frame portion 11 b and are in contact with the outer peripheral surface. And the contact part is joined and the welding mark is formed.
Hereinafter, the left wire member 60 will be described.

As shown in FIG. 5, the inner end portion 62 extends in a hook shape so as to cover the bottom surface and the rear surface of the outer peripheral surface of the lower frame portion 11b, and is abutted and welded to the bottom surface and the rear surface.
For this reason, the structure is well-balanced in consideration of the workability of assembling the wire members while increasing the rigidity of assembling the wire members 60 to the main frame 11.

The wire main body 61 and the outer end 63 extend so as to cover the front and outer surfaces of the mounting bracket 17, and are welded in contact with the front and outer surfaces.
Therefore, since the wire member 60 is supported by the mounting bracket 17 from the rear of the seat to the front and from the inside to the outside in the seat width direction, the assembling rigidity of the wire member 60 is remarkably improved. For example, the assembling rigidity of the wire member is significantly increased as compared with the case where the outer end 63 is attached to the inner side surface of the attachment bracket 17.

As shown in FIG. 4, the outer end 63 is disposed in a gap provided between the side frame 21 and the portion of the mounting bracket 17 where the bent portion 17 d is formed in the seat width direction.
In other words, the wire member 60 is disposed at a position not protruding beyond the main frame 11 in the seat width direction, that is, inside the outer side surface of the main frame 11.
Therefore, the rigidity of the mounting bracket 17 itself and the rigidity of the wire member 60 can be improved, and the interference between the wire member 60 and other components can be suppressed.
Particularly, in the vehicle seat S in which the seat can be arranged between the use state and the storage state as in the present embodiment, interference with a rotating component such as the cushion frame 20 can be avoided. Effect.

<Other embodiments>
In the above embodiment, as shown in FIG. 1, the vehicle seat S is formed as a rear seat of the vehicle, but is not particularly limited, and may be a front seat of the vehicle or a three-row seat. The vehicle may have a middle seat.

In the above embodiment, the vehicle seat S is a seat that can be arranged between the use state and the storage state, but is not particularly limited. For example, the use state, the storage state, and the seat body The seat may be a seat in which three types of seat arrangements such as a flipped-up state and a chip-up state are possible.
Further, the storage floor is formed in front of the vehicle seat S, but the storage floor may be formed behind the vehicle seat S without any particular limitation.

  In the above embodiment, as shown in FIGS. 2 and 3, the support base 40 is directly fixed to the vehicle body floor, but is not particularly limited. For example, the support base 40 movably supports the seat body in the front-rear direction. It may be fixed indirectly on the vehicle body floor via a rail device.

  In the above embodiment, the reinforcing bracket 16 and the mounting bracket 17 are attached to the main frame 11 by welding. However, the welding method is not particularly limited, and various welding such as arc welding and spot welding other than laser welding can be used. A method may be employed.

In the above embodiment, as shown in FIG. 3, the mounting bracket 17 has an upper portion attached to the back frame 10 and a lower portion attached to the support base 40, but can be changed without any particular limitation. It is.
For example, the lower portion of the mounting bracket 17 may be attached to the cushion frame 20 or may be attached to a separately provided rail device.

In the above embodiment, as shown in FIG. 5, the inner end 62 of the wire member 60 is attached so as to extend along the outer peripheral surface of the lower frame portion 11b, but is not particularly limited. It may extend through the part 11b and be attached by welding.
Similarly, the outer end portion 63 may extend through the mounting bracket 17 in the seat width direction and may be attached by welding.

  In the above-described embodiment, a storable vehicle seat used for an automobile has been described as a specific example. However, the present invention is not limited to this. In addition to a vehicle seat such as a train, a bus, and the like, a vehicle seat such as an airplane and a ship, It can also be used as

In the present embodiment, the vehicle seat S according to the present invention has been mainly described.
However, the above embodiment is merely an example for facilitating understanding of the present invention, and does not limit the present invention. The present invention can be modified and improved without departing from the gist thereof, and it is needless to say that the present invention includes equivalents thereof.
In particular, the shape, arrangement, and configuration of the back frame 10, the reinforcing bracket 16, the mounting bracket 17, and the wire member 60 described in the above embodiment are merely examples, and do not limit the present invention. Absent.

S Vehicle seat 1 Seat back 1a, 2a, 3a Cushion material 1b, 2b, 3b Skin material 2 Seat cushion 3 Headrest 3c Headrest guide 10 Back frame 11 Main frame 11a Upper frame portion 11b Lower frame portion 11c, 11d Side frame portion 12 Connection frame 13 Panel frame 13a Frame mounting projection 13b Reinforcement recess 14 Retractor bracket 15 Skin suspension wire 15a Wire body 15b Wire extension 15c Wire terminal 16 Reinforcement bracket 16a Side wall 16b Front wall 16c Back wall Part 16d Notch 16e Step 17 Mounting bracket 17a Side wall 17b Front wall 17c Rear wall 17d Bend 17e Notch 18 Seat rotation shaft 19 Reclining device 20 Cushion frame 21 Side frame 22 Front connection pipe 23 Central connection pipe 24 Pan frame 26 Cushion rotation device 27 Cushion rotation shaft 28 Leg rotation device 29 Leg rotation shaft 30 Support leg 31 Leg body 32 Leg connection 40 Support base 41 connecting wall portion 42 outer wall portion 50 switching device 51 operating lever 60, 60 'wire member 61 wire main body portion 62 inner end portion 63 outer end portion

Claims (10)

A back frame that becomes the skeleton of the backrest,
A mounting bracket disposed on an outer portion of the back frame in the seat width direction, and attached to a lower portion of the back frame;
A wire member attached to each of the lower portion of the back frame and the attachment bracket,
The wire member is
An inner end portion arranged inside the seat width direction and attached to the back frame;
An outer end portion disposed outside the seat width direction and attached to an outer portion of the mounting bracket in the seat width direction.   The vehicle seat according to claim 1, wherein the mounting bracket is attached to an outer surface of the back frame, and connects the back frame to a support base provided on a vehicle body floor. The back frame includes a frame-shaped main frame made of a pipe material,
The inner end portion is attached to a lower end portion of the main frame, and extends in a seat front-rear direction along an outer peripheral surface of the lower end portion,
The vehicle seat according to claim 1, wherein the outer end portion extends in a seat front-rear direction along an outer surface of the mounting bracket. The mounting bracket is
A side wall portion disposed outside the main frame in the seat width direction;
A front wall portion bent continuously from one end in the width direction of the side wall portion and extending to the front surface of the main frame;
A rear wall portion continuously bent from the other end in the width direction of the side wall portion and extending to the rear surface of the main frame while facing the front wall portion,
The vehicle seat according to claim 3, wherein the front wall portion and the rear wall portion of the mounting bracket are joined to the main frame. The side wall portion extends vertically along the main frame,
A bent portion bent inward in the seat width direction along the main frame between a portion corresponding to the main frame and a lower end portion to which the wire member is attached in the seat vertical direction in the side wall portion. The vehicle seat according to claim 4, wherein: Equipped with a cushion frame that serves as a skeleton for the seat,
The cushion frame is attached to the outside of the main frame in the seat width direction, and has a cushion side frame constituting a side in the seat width direction,
The vehicle according to any one of claims 3 to 5, wherein the outer end portion is disposed in a gap formed between the mounting bracket and the cushion side frame in a seat width direction. Sheet. The main frame has left and right side frame portions disposed laterally in the seat width direction, and a lower frame portion that connects lower ends of the left and right side frame portions,
The mounting bracket is attached to an outer surface of the side frame portion,
7. The main frame according to claim 3, wherein a reinforcing bracket for connecting a portion of the side frame portion to which the mounting bracket is mounted and the lower frame portion is provided. The vehicle seat according to claim 1. The reinforcing bracket is formed in a substantially U-shaped cross section,
The vehicle according to claim 7, wherein a stepped portion bent to one side in a seat front-rear direction is formed in a peripheral portion of an end portion of the reinforcing bracket attached to the lower frame portion. Sheet. The reinforcing bracket,
A side wall portion arranged inside the frame shape of the main frame,
A front wall portion bent continuously from one end in the width direction of the side wall portion and extending to the front surface of the main frame;
A rear wall portion that continuously bends from the other end in the width direction of the side wall portion and extends to the rear surface of the main frame while facing the front wall portion,
The front wall and the rear wall are joined to the main frame,
9. The vehicle according to claim 7, wherein a cutout portion for avoiding interference with the main frame is formed at both end portions of the side wall portion adjacent to the main frame. 10. Sheet. The back frame includes a plate-shaped panel frame disposed behind a seat of the main frame,
10. The panel frame according to claim 7, wherein a reinforcing concave portion that is recessed toward the rear of the seat is formed in a portion of the panel frame that faces the reinforcing bracket in the front-rear direction of the seat. 11. The vehicle seat according to the above.

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