JP6498913B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat, and more particularly to a vehicle seat capable of storing a seat back and a seat cushion at a position lower than a vehicle body floor.

  Conventionally, there are already known vehicle seats in which the seat back and the seat cushion constituting the seat body can be stored at a position lower than the vehicle floor, and among them, the seat body is tilted forward and provided in front of the seat. There is a vehicle rear seat that can be stored on a storage floor (see, for example, Patent Document 1).

A vehicle seat described in Patent Document 1 is attached to a vehicle body floor, and has a mounting shaft that rotatably supports a seat back, a holding groove in which an upper end supports a front portion of a seat cushion, and a lower end is fixed to a storage floor. And a leg structure that is rotatably held by the storage unit.
When the seat body is retracted, the seat back rotates relative to the vehicle floor to move the seat cushion to the storage floor, and the leg member rotates around the holding groove in conjunction with the seat back. It can be stored on the storage floor.
The vehicle seat can be switched from a use state in which an occupant can be seated to a tip-up state in which the seat member is lifted upward after the leg member is detached from the holding groove.

JP 2009-67309 A

By the way, in the seat which can store a seat body like patent documents 1, a reclining mechanism for connecting a seat back so that folding is possible, a storage mechanism for storing on a storage floor, etc. are complicated structures. It has become. Therefore, it is necessary to devise the arrangement of the component parts to ensure the rigidity of the entire seat.
On the other hand, when installing the seat in the vehicle, the seat back should be on one side in the seat width direction when the seat cushion is used as the reference position in order to achieve a layout that takes into account the internal shape of the vehicle and the installation space for interior parts. Some ideas, such as shifting and arranging, may be required.
Therefore, the above-described seat has been desired to be designed in consideration of the layout in the vehicle while ensuring the rigidity of the entire seat.

Further, in the seat as in Patent Document 1, the leg member that supports the seat cushion is a long member because it is connected between the seat cushion and the storage floor.
Then, when the leg member is detached from the holding groove by the switching operation between the use state and the tip-up state, the swinging width in the front-rear direction of the detached leg member is increased due to the long overall length of the leg member. The operation of reattaching the member to the holding groove has been difficult.
Therefore, a vehicle seat that can be easily switched from the state of use has been desired.

Further, in the seat as in Patent Document 1, the structural components of the storage structure are attached not only to the vehicle body floor surface on which the seat body is installed, but also to the storage floor surface, and the structure is complicated to store the seat body. It was.
Therefore, a vehicle seat that can be stored on a storage floor with a simple structure has been desired.

The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a vehicle seat that ensures the rigidity of the entire seat and considers the layout in the vehicle.
Another object of the present invention is to provide a vehicle seat that can be easily switched from a use state.
Another object of the present invention is to provide a vehicle seat that can be stored on a storage floor with a simple structure.

According to the vehicle seat of the present invention, the subject is provided with a seat body having a seat back serving as a backrest portion and a seat cushion coupled to the seat back and serving as a seating portion, and can be used by a passenger. and a state, wherein a sheet body and switchable vehicle seat between a moving state of moving from the use condition, attached to the vehicle body floor side, the seat body can rotate in the direction back and forth sheet and A seat rotation shaft coupled to one end side of the seat body in the longitudinal direction of the seat so that the upper end portion is attached to the other end side of the seat body, and a lower end portion is provided on the vehicle body floor side. A detachable leg that is detachably held by the member, a support base that is provided on the vehicle body floor side and to which the seat rotation shaft and the leg holding member are attached, and is mounted on the support base A locking device that can be locked in a state where the detachable leg is held by the leg holding member, and the center position in the seat width direction of the back frame that becomes the skeleton of the seat back becomes the skeleton of the seat cushion The center position of the support base is shifted to one side in the seat width direction with respect to the center position of the cushion frame, and the center position of the support base in the seat width direction is shifted to the one side with respect to the center position of the cushion frame, The locking device is solved by being arranged on the other side in the sheet width direction with respect to the center position of the support base.

In the above vehicle seat, since the seat back is disposed so as to be shifted to one side in the seat width direction with respect to the seat cushion, a vehicle seat in which the layout in the vehicle is appropriately considered can be realized.
And since the lower end part of an attachment / detachment leg is arrange | positioned at the vehicle body floor side instead of a storage floor like before, the full length of an attachment / detachment leg can be made small. Since the swing width in the front-rear direction of the detachable leg is reduced by the small total length of the detachable leg, the detachable leg is easily held by the leg holding member. Therefore, the switching operation from the use state becomes easier.
And since all the components of the storage structure are arranged on the vehicle body floor side, a large storage space can be secured on the storage floor.
And since a support base is offset-arranged in the position shifted to the one side with respect to the seat cushion, it can receive the load of the seated passenger | crew efficiently.
And since the locking device is arrange | positioned rather than the center position of the support base in the other side of a sheet | seat width direction, the vacant space by offset arrangement | positioning can be used effectively.

Further, according to the vehicle seat of the present invention, the vehicle seat of the present invention includes a seat body having a seat back serving as a backrest portion and a seat cushion coupled to the seat back and serving as a seating portion, so that a passenger can be seated. and use, the sheet body a switchable vehicle seat between a moving state of moving from the use condition, attached to the vehicle body floor side, the seat body can rotate in the direction back and forth sheet A seat pivot shaft connected to one end side of the seat body in the front-rear direction of the seat body, a support base provided on the vehicle body floor side to which the seat pivot shaft is attached, and a seat in the vehicle seat A reclining device that is disposed on the other side in the width direction and connects the seat body to the support base so as to be rotatable about the seat rotation axis. The center position in the seat width direction of the back frame serving as the skeleton of the seat back is shifted to one side in the seat width direction with respect to the center position of the cushion frame serving as the skeleton of the seat cushion, and the support base The center position in the seat width direction is shifted to the one side with respect to the center position of the cushion frame, and the reclining device is disposed on the other side in the seat width direction from the center position of the support base. Is also solved.
In the above vehicle seat, since the seat back is disposed so as to be shifted to one side in the seat width direction with respect to the seat cushion, a vehicle seat in which the layout in the vehicle is appropriately considered can be realized.
And since a support base is offset-arranged in the position shifted to the one side with respect to the seat cushion, it can receive the load of the seated passenger | crew efficiently.
And since the reclining apparatus is arrange | positioned in the other side of the sheet | seat width direction rather than the center position of a support base, the space vacated by offset arrangement | positioning can be used effectively.

At this time, an upper end portion is attached to the other end side of the seat body, and a lower end portion is provided with a detachable leg that is detachably held by a leg holding member provided on the vehicle body floor side. A seat rotation shaft and the leg holding member may be attached .

At this time, a base cover that covers the support base from above and guides the detachable leg that moves together with the seat body is provided, and the side portion on one side of the left and right side portions of the seat cushion is the base cover. It is good to arrange in the position which overlaps up and down.
As described above, since the base cover guides the detachable leg that moves together with the seat body, a vehicle seat that can be easily switched from the use state can be realized by using existing components.
And since the side part of one side is arrange | positioned in the position which overlaps with a base cover up and down in the right-and-left side part of a seat cushion, the seat enlargement of a seat width direction can be suppressed.

At this time, the movement state is a storage state in which the seat body is moved to a position lower than the vehicle body floor, and includes a floor connecting member for connecting the vehicle seat on the vehicle body floor, The center position of the floor connecting member in the seat width direction may be arranged so as to be shifted to the one side with respect to the center position of the cushion frame .
With the above configuration, since the floor connecting member is offset and shifted to the same side as the side where the seat back is shifted when the seat cushion is set to the reference position, it can efficiently receive the load of the seated occupant, The rigidity of the entire sheet can be secured.
When the seat body is moved between the use state and the storage state, the switching operation is improved.

At this time, the vehicle seat includes a reclining device that is disposed on the other side in the seat width direction and connects the seat body to the support base so as to be rotatable about the seat rotation axis. At least a part of the member may be disposed between the reclining device and the rear end portion of the support base in the seat front-rear direction .
With the above configuration, the support rigidity of the reclining device and its peripheral portion can be increased.

At this time, the reclining device is mounted on the support base, and includes a connection bracket that connects the lower end portion of the seat back and the reclining device, and a bracket cover that covers the connection bracket from the outside. good.
The bracket cover can protect the reclining device and its peripheral portion from external impacts, and prevent foreign matter from entering.

At this time, the reclining device includes an operation lever for switching between the locked state in which the seat back is locked and the unlocked state, and the operating lever is provided on the other side of the seat back in the seat width direction. It is good to be arranged.
With the above configuration, the space that is freed by the offset arrangement can be used effectively.

At this time, the floor connecting member is disposed at the left and right side positions of the vehicle seat, and the floor connecting member on the other side in the seat width direction is wider than the floor connecting member on the one side in the seat width direction. It should be overhanging outside.
With the above configuration, when the seat cushion is set to the reference position, the seat back is shifted to one side in the seat width direction, while the floor connecting member on the other side protrudes outside in the seat width direction. As a result, the seat is stably mounted on the vehicle body floor.

At this time, the left and right lower rails fixed on the vehicle body floor and extending in the front-rear direction of the seat, the left and right upper rails supported so as to be slidable along the lower rails, and the upper rails locked in the state supported by the lower rails. A rail lock device, the rail lock device having an operation strap for switching between a locked state in which the upper rail is locked and an unlocked state, and the operation strap is provided on the support base. It is preferable that it is disposed on the other side in the seat width direction and extends so as to protrude toward the front of the seat .
As described above, since the operation strap is disposed on the other side in the seat width direction on the support base, a space vacated by the offset arrangement can be effectively used.
Since the operation strap extends so as to protrude toward the front of the seat, the seated occupant can easily take the hand.

At this time, a buckle for mounting a tongue plate provided on a seat belt for restraining a seated occupant is provided, and the buckle is disposed on the outer side in the seat width direction than the seat back, and is attached to the seat cushion. It is good to arrange on one side in the sheet width direction .
With the above configuration, interference between components can be suppressed, and a space vacated by the offset arrangement can be effectively used.

At this time, the seat cushion includes an outer cushion cover and an inner cushion cover that cover at least a portion connected to the seat back, and an armrest that supports an arm portion of a seated occupant. In the seat back, it is preferable that the seat back is disposed on a side portion on one side.
By the cushion cover, it is possible to protect the connected portions from external impact and to prevent foreign matters from entering.
And an armrest can be moved using the space vacated by offset arrangement.

ADVANTAGE OF THE INVENTION According to this invention, the vehicle seat which considered the arrangement layout in a vehicle suitably is realizable. Further, it is possible to efficiently receive the load of the seated occupant and ensure the rigidity of the entire seat.
According to the present invention, when the seat body is moved between the use state and the storage state, the switching operation is improved. In addition, a large storage space can be secured on the storage floor.
According to the present invention, the load of the seated occupant can be efficiently received by the offset arrangement of the support base. In addition, an empty space can be effectively used by the offset arrangement.
ADVANTAGE OF THE INVENTION According to this invention, the vehicle seat which switching operation is easy from a use state is realizable using an existing component. Moreover, the sheet size increase in the sheet width direction can be suppressed.
According to the present invention, the support rigidity of the reclining device and its periphery can be increased.
According to the present invention, it is possible to effectively use a space vacated by the offset arrangement. Further, the seated occupant can easily take the operation strap.
ADVANTAGE OF THE INVENTION According to this invention, it can protect from an external impact in a reclining apparatus and its peripheral part, and can prevent invasion of a foreign material.
According to the present invention, it is possible to effectively use a space vacated by the offset arrangement.
According to the present invention, the seat is stably mounted on the vehicle body floor.
According to the present invention, it is possible to suppress interference between components, and to effectively use a space vacated by an offset arrangement.
According to the present invention, it is possible to protect the connected portions from external impacts and to prevent foreign matters from entering.
According to the present invention, the armrest can be moved using the space that is vacated by the offset arrangement.

It is a perspective view of a vehicular seat concerning this embodiment. It is a perspective view of the vehicle seat seen from another angle. It is a perspective view of the seat frame used as the frame of a vehicular seat. It is a front view of a seat frame. It is a perspective view of the support base of a vehicle seat. It is a perspective view of the base cover which protects a support base. It is a side view of a vehicle seat, and is a diagram for explaining an operation of moving from a use state to a storage state. It is a side view of a vehicle seat, and is a diagram for explaining an operation of moving to a storage state. It is a side view of a vehicle seat, and is a diagram for explaining an operation of moving from a stored state to a tip-up state. It is a side view of a vehicle seat, and is a diagram for explaining an operation of returning from a tip-up state to a use state.

Hereinafter, a vehicle seat according to an embodiment of the present invention will be described with reference to FIGS.
The present embodiment is a vehicle seat that can store a seat body on a storage floor, the seat pivot shaft connected so that the seat body can pivot, an upper end attached to the seat body, and a lower end A detachable leg that is detachably held by the leg holding member on the support base, and left and right floor connecting members for connecting the seat to the vehicle body floor, and the seat back and the floor connecting member in the seat width direction are provided. The present invention relates to an invention of a vehicle seat characterized in that the center position is shifted to one side in the seat width direction with respect to the center position of the seat cushion.
The side on which the occupant sits with respect to the seat back of the vehicle seat is the front side of the seat.

The vehicle seat S of the present embodiment is a rear seat corresponding to a rear seat of the vehicle, for example. In addition, in a vehicle provided with three rows of seats in the vehicle longitudinal direction, it can be used as a second row of middle seats.
As shown in FIGS. 1 and 2, the vehicle seat S is attached to a seat body including a seat back 1, a seat cushion 2, and a headrest 3 via a floor connecting member 6 on a vehicle body floor. The left and right rail devices 7 of FIG. 3 that support the main body so as to be movable back and forth, the detachable legs 30 that support the seat main body from below, and the support base 40 that is installed on the rail device 7 and supports the detachable legs 30 from below. The leg holding member 50 is mounted on the support base 40 and detachably holds the lower end of the detachable leg 30. The base cover 60 covers the support base 40 from above.
Further, as shown in FIG. 2, the vehicle seat S is connected to the reclining device 13 that connects the seat back 1 to the support base 40 so as to be rotatable about the seat rotation shaft 12, and the seat back 1. A cushion rotation device 25 that rotatably connects the seat cushion 2 and a leg rotation device 28 that rotatably connects the detachable leg 30 to the seat cushion 2 are provided.
As shown in FIG. 7, a concave storage floor formed at a position lower than the vehicle body floor is provided on the front side of the vehicle seat S.

The vehicle seat S can be arranged in three types of seat arrangements: a use state in which an occupant can be seated, a storage state in which the seat body is stored on the storage floor, and a tip-up state in which the seat body is flipped upward. It is a sheet.
Specifically, when the occupant pulls the operation lever 1c of FIG. 1 from the use state shown in FIG. 7A, the vehicle seat S is folded forward and folded and stored on the storage floor. The storage state is switched to that shown in FIG. Further, the occupant manually raises the seat body upward from the housed state to switch to the tip-up state shown in FIG. 9B. Further, when the occupant pulls the detachable leg 30 functioning as the operation portion from the tip-up state, the seat cushion 2 rotates downward with respect to the seat back 1 and returns to the use state shown in FIG. Details will be described later.

As shown in FIG. 1, the seat back 1 is a backrest portion that supports the back of the occupant from the back, and the cushion pad 1a is placed on the back frame 10 of FIG. Has been configured. On the upper surface of the seat back 1, an operation lever 1c is disposed on the right side in the seat width direction.
On the left side of the seat back 1 in the seat width direction, an armrest 4 for supporting the arm portion of the seated occupant is attached.

As shown in FIG. 1, the seat cushion 2 is a seating portion that supports an occupant from below, and the cushion pad 2a is placed on the cushion frame 20 shown in FIG. It is configured to be covered with the skin 2b.
A buckle 5 for attaching a tongue plate provided on a seat belt (not shown) is attached to the left side of the seat cushion 2.
The headrest 3 is a head that supports the occupant's head from behind, and is configured such that a cushion pad 3a is placed on a pillar (not shown) serving as a core and covered with an outer skin 3b.

As shown in FIGS. 2 and 3, the floor connecting member 6 is disposed at the left and right side positions of the seat, and mainly includes a front floor connecting member 6 a and a rear floor connecting member 6 b.
The front floor connecting member 6a is formed of a curved plate body, and, as shown in FIG. 3, one end is overlapped with the front part of the left and right lower rails 7a and bolted, and the other end extends forward of the seat and extends on the vehicle body floor. The bolt is fastened.
The right front floor connecting member 6a extends forward in the seat so as to slightly protrude outward in the seat width direction, and is inclined to the outer side in the seat width direction than the left front floor connecting member 6a. .

As shown in FIG. 2, the rear floor connecting member 6b is formed of a plate-shaped plate body, one end is attached to the rear part of the left and right lower rails 7a, and the other end extends outward in the seat width direction and is on the vehicle body floor. Bolts are fastened.
The rear floor connecting member 6b is disposed between the reclining device 13 and the rear end portion of the support base 40 in the front-rear direction.

The rail device 7 is disposed between the seat body and the vehicle body floor in the vertical direction. As shown in FIG. 3, the rail device 7 is fixed to the vehicle floor via a floor connecting member 6 and extends in the vehicle front-rear direction. The lower rail 7a and the left and right upper rails 7b supported slidably along the lower rail 7a.
A support base 40 is installed on the upper surfaces of the left and right upper rails 7b, and a rail lock device (not shown) that can be locked in a state where the upper rail 7b is supported by the lower rail 7a is mounted on the support base 40.
The rail lock device includes an operation strap 7c for switching between a locked state in which the upper rail 7b is locked and a unlocked state.
The operation strap 7c is disposed on the right side in the seat width direction and extends so as to protrude toward the front of the seat.

The back frame 10 is formed of a substantially rectangular frame that is a skeleton of the seat back 1, and is connected to a support base 40 at the lower left and right outer surfaces of the back frame 10 as shown in FIG. Left and right connecting brackets 11 are attached.
The connection bracket 11 is made of a substantially bow-shaped sheet metal member extending in the vertical direction. The upper end of the connection bracket 11 is attached to the back frame 10, and the lower end is attached to the support base 40. A resin bracket cover 11 a is attached to the left and right outer sides of the connecting bracket 11.
A seat rotation shaft 12 that is pivotally supported by the support base 40 in the left-right direction is provided at the lower end of the left connection bracket 11, and the back frame 10 with respect to the support base 40 is provided at the lower end portion of the right connection bracket 11. A reclining device 13 for connecting the two to each other is attached.

As shown in FIG. 3, the reclining device 13 is disposed on the left and right inner surfaces of the connection bracket 11 and suppresses interference with the cushion frame 20 in the left-right direction.
The reclining device 13 mainly includes a seat rotation shaft 12 and a spiral spring 14 that rotates the back frame 10 forward with the seat rotation shaft 12 as a center and biases the back frame 10 to a stored state.
The seat rotation shaft 12 is pivotally supported on the back frame 10 side and the support base 40 side in the left-right direction, and one end of the spiral spring 14 is locked on the back frame 10 side, and the other end is on the support base 40 side. It is locked.
The reclining device 13 can be switched to a locked state that locks the rotation operation of the back frame 10, locks the back frame 10 in the standing posture of FIG. 1, and releases the locked state by operating the operation lever 1 c. Then, the back frame 10 can be rotated forward by the urging force of the spiral spring 14 and folded to the vehicle body floor side.

  The cushion frame 20 is formed of a substantially rectangular frame that is a skeleton of the seat cushion 2, and connects a side frame 21 disposed on the left and right sides and a front portion of each side frame 21 as shown in FIG. The front connection pipe 22, the center connection pipe 23 that connects the center portions of the side frames in the front-rear direction, and the pan frame 24 as a plate-like frame that connects the front connection pipe 22 and the center connection pipe 23. It is configured.

The side frame 21 is made of a sheet metal member extending in the front-rear direction of the seat, the front portion thereof is connected to the front connection pipe 22, and the cushion frame 20 is rotatably connected to the back frame 10 at the rear end portion. A cushion rotating device 25 is attached.
As shown in FIG. 2, an outer cushion cover 21 a and an inner cushion cover 21 b having a U-shaped longitudinal section that covers the side frame 21 are attached to the rear portion of the side frame 21.
The front connection pipe 22 is formed of a U-shaped pipe member, and a leg rotation device 28 that rotatably connects the detachable leg 30 to the cushion frame 20 is attached to the left and right inner surfaces thereof.

The cushion rotating device 25 is a known device, and as shown in FIG. 3, a cushion rotating shaft 26, a spiral spring 27 that urges the cushion frame 20 downward about the cushion rotating shaft 26, It has.
The cushion rotation shaft 26 is pivotally supported on the back frame 10 side and the cushion frame 20 side in the left-right direction, and one end of the spiral spring 27 is locked on the back frame 10 side, and the other end is on the cushion frame 20 side. It is locked.
The cushion rotation device 25 can be switched to a locked state in which the rotation operation of the cushion frame 20 is locked.
As shown in FIG. 8C, the cushion rotation device 25 is configured to store the seat body on the storage floor, specifically, when the back frame 10 is folded to the cushion frame 20 side. The rotational movement of the cushion frame 20 is locked. Then, as shown in FIG. 10A, when the detachable leg 30 functioning as the operation lever is pulled, the locked state is released, and the cushion frame 20 is moved downward with respect to the back frame 10 by the urging force of the spiral spring 27. Can be rotated.

The leg rotation device 28 includes a leg rotation shaft 28a and a spring member that urges the attachment / detachment leg 30 on the opposite side of the cushion frame 20 around the leg rotation shaft 28a, in other words, away from the cushion frame 20. 28b.
The leg rotation shaft 28a is pivotally supported by the front connecting pipe 22 and the upper end of the detachable leg 30 in the left-right direction, and one end of the spring member 28b is locked to the cushion frame 20 side, and the other end is detachable leg. It is locked on the 30 side.
The leg rotation device 28 can be switched to a locked state in which the rotation operation of the attachment / detachment leg 30 is locked, and the attachment / detachment leg 30 is detached from the leg holding member 50 as shown in FIG. When it is housed on the 20 side, the rotation of the detachable leg 30 is locked. Then, as shown in FIG. 10A, when the locked attachment / detachment leg 30 is pulled, the locked state is released, and the attachment / detachment leg 30 is returned to the use state by the biasing force of the spring member 28b. 50 can be moved to a position where it can be mounted.

As shown in FIG. 3, the detachable leg 30 is a substantially U-shaped pipe member that supports the seat cushion 2, and connects the leg main body portion 31 disposed on the left and right sides and the lower end of each leg main body portion 31. A leg connecting portion 32.
The upper end of the leg main body 31 is connected to the left and right inner surfaces at a substantially central portion in the front-rear direction of the cushion frame 20, and the substantially central portion in the left-right direction of the leg connecting portion 32 is detachably held by the leg holding member 50. Has been.
The upper end portion of the detachable leg 30 protrudes forward of the seat from the lower end portion of the detachable leg 30, and is inclined upward from the lower end portion of the detachable leg 30 toward the upper end portion of the detachable leg 30.

  The support base 40 is a member that supports the seat body. As shown in FIG. 5, the left and right side base portions 41 arranged along the upper rail 7 b on the left and right sides, and the front portions of the side base portions 41 are provided. A first base connecting portion 42 to be connected, a second base connecting portion 43 for connecting a substantially central portion of each side base portion 41, left and right reinforcing base portions 44 attached to the upper surface of each side base portion 41, A holding member support portion 45 that connects the base connecting portion 42 and the second base connecting portion 43 and supports the leg holding member 50 is provided.

As shown in FIG. 5, the side base portion 41 and the reinforcing base portion 44 are made of a substantially crank-shaped sheet metal member that is long in the front-rear direction. The side base portion 41 is connected to the upper surface of the upper rail 7b. The side base portion 41 overlaps with the upper and lower sides to form a closed cross-sectional structure.
The left and right ends of each of the first base connecting portion 42 and the second base connecting portion 43 are connected by being sandwiched between a side base portion 41 and a reinforcing base portion 44.
The holding member support portion 45 is a curved sheet metal member that supports the leg holding member 50, a front portion thereof is attached to the first base connecting portion 42, and a rear portion thereof is attached to the second base connecting portion 43. Yes.

As shown in FIGS. 3 and 5, the leg holding member 50 is formed of a substantially U-shaped clip member that detachably holds the detachable leg 30, and supports the holding member at a position in which the opening portion is directed obliquely upward to the front. Supported by the portion 45.
The leg holding member 50 includes a pair of side wall portions 51 and a bottom wall portion 52 that connects the lower end portions of the side wall portions 51.
Each side wall 51 is bent in a direction close to each other from the lower end to the upper end, in other words, is bent in the opening inward direction so as to narrow the opening portion of the leg holding member 50, At the upper end portion, a curled portion 53 that is bent in the outward direction of the opening is formed.
The pair of curled portions 53 pass through openings provided in the base cover 60 and are exposed to the outside on the detachable leg 30 side.

An inertia lock device 54 that locks the leg connecting portion 32 of the detachable leg 30 while being held by the leg holding member 50 at the time of a rear-end collision of the vehicle is disposed at a portion adjacent to the leg holding member 50.
The inertia lock device 54 corresponds to a lock device, is attached to the support base 40, and is disposed at a position overlapping the leg holding member 50 in the seat front-rear direction.
The inertia lock device 54 is disposed in a vacant space on the left side in the seat width direction with respect to the center position of the support base 40.

  The base cover 60 is made of a resin molded product that covers the entire support base 40 from above, and as shown in FIG. 4, a front cover 61 disposed on the front side of the seat, and a rear cover disposed behind the front cover 61. , Is composed of. The front cover 61 and the rear cover are snap-fit joined.

The front cover 61 has a guide shape that guides the detachable leg 30 that moves together with the seat body.
Specifically, the front cover 61 is disposed at the rear of the seat with respect to the leg accommodating recess 62 for accommodating the detachable leg 30 and the leg accommodating recess 62, and the detachable leg 30 moves to the rear of the leg accommodating recess 62. A leg movement restricting portion 63 to be regulated and a contact portion 64 that is disposed in front of the seat with respect to the leg receiving recess 62 and that can come into contact with the left side portion of the seat cushion 2 are provided.

The leg receiving recess 62 is formed of a substantially U-shaped recess that is recessed downward from a substantially central portion of the upper surface of the base cover 60, and is disposed at a position in which the opening is directed obliquely upward to the front.
A rectangular opening is formed in the front and rear side walls of the leg receiving recess 62, and a part of the leg holding member 50 is inserted through the opening from the back side of the base cover 60 as shown in FIG. Exposed outside.
Further, as shown in FIG. 4, an opening extending vertically is formed in the rear side wall, and a part of the inertia lock device 54 is exposed to the outside through the opening from the back side of the base cover 60. Exposed.

As shown in FIG. 4, the leg movement restricting portion 63 includes a portion that protrudes from the substantially central portion of the upper surface of the base cover 60 toward the front side of the seat, and is formed continuously from the rear portion of the leg housing recess 62. .
The leg movement restricting portion 63 can restrict the rearward movement of the detachable leg 30 when the detachable leg 30 is accommodated in the leg accommodating recess 62, and can guide the detachable leg 30 toward the leg accommodating recess 62.
The contact portion 64 is a convex portion that protrudes upward from the upper surface of the base cover 60, and is disposed at a position overlapping the left side portion of the seat cushion 2.

In the above configuration, as shown in FIG. 4, the center position of the seat back 1 in the seat width direction is shifted from the center position of the seat cushion 2 to the left side in the seat width direction.
The center position in the seat width direction of the pair of floor connecting members 6 is similarly offset and shifted to the left with respect to the center position of the seat cushion 2.
Therefore, it is possible to realize a seat that ensures the rigidity of the seat while considering the layout in the vehicle.

Further, in the above configuration, the center position of the headrest 3 in the seat width direction is disposed at substantially the same position as the center position of the seat cushion 2.
Therefore, for the headrest 3 that does not significantly affect the layout in the vehicle, it is possible to set a layout that prioritizes the rigidity of the seat.

In the above configuration, the center position of the support base 40 in the seat width direction is substantially the same position as the center position of the pair of floor connecting members 6, and is offset and shifted to the right side with respect to the center position of the seat cushion 2. .
Therefore, the load of the seated occupant can be received efficiently.

<Sheet storage operation>
Next, an operation for moving the sheet main body from the use state to the storage state will be described with reference to FIGS. 7 and 8, the reclining device 13, the cushion rotation device 25, and the leg rotation device 28 are in a locked state when illustrated with a black circle, and are in an unlocked state when illustrated with a white circle. Shall be shown. The same applies to FIGS. 9 and 10.

  When the vehicle seat S is in the use state shown in FIG. 7A, the seat back 1 is supported by the support base 40 and is locked in the standing posture by the reclining device 13, and is connected to the seat back 1. The cushion 2 is supported from below by the detachable legs 30 held by the leg holding member 50.

When the vehicle seat S is moved from the use state to the storage state, for example, the operation lever 1c of FIG. 1 provided on the upper surface of the seat back 1 is operated.
When the occupant operates the operation lever 1c, the reclining device 13 is released from the locked state as shown in FIG. 7B, and the seat back 1 holds the seat cushion 2 in the storage floor by the urging force of the spiral spring 14. Rotation is started toward the front side of the seat about the seat rotation shaft 12 so as to move to the front.
The detachable leg 30 starts to rotate toward the seat cushion 2 around the leg rotation shaft 28a with respect to the seat cushion 2 in conjunction with the rotation of the seat back 1. At this time, the detachable leg 30 is in a state of being stretched between the seat cushion 2 and the vehicle body floor side, so that the seat cushion 2 and the seat back 1 can be moved stably.
Note that a known cable (not shown) is connected between the operation lever 1c and the reclining device 13, and the cable is pulled by the operation of the operation lever 1c, thereby releasing the locked state.

As shown in FIG. 8A, when the seat back 1 reaches a predetermined rotational position, the detachable leg 30 is detached from the leg holding member 50.
The detached detachable leg 30 rides on the upper surface of the base cover 60 and rotates so as to be folded toward the seat cushion 2 around the leg rotation shaft 28a against the urging force of the spring member 28b. Then, when the attachment / detachment leg 30 reaches a predetermined rotation position, the attachment / detachment leg 30 is locked in a state of being accommodated on the seat cushion 2 side by the leg rotation device 28.

  Further, as shown in FIG. 8B, when the seat back 1 reaches a predetermined rotational position, the front portion of the seat cushion 2 comes into contact with the storage floor surface before the attachment / detachment leg 30.

By the above series of operations, as shown in FIG. 8C, the seat body is stored on the storage floor, and the vehicle seat S is switched to the stored state.
The seat cushion 2 is locked by the cushion rotating device 25 when the seat cushion 2 is in the stowed state, specifically when the seat back 1 is folded to the seat cushion 2 side.
The detachable leg 30 is disposed at a lower position than the leg holding member 50 in the stored state.

<Seat tip up operation>
Next, the operation of moving the seat body from the stored state to the tip-up state will be described with reference to FIG.
When the vehicle seat S is in the stored state shown in FIG. 9A, for example, the occupant manually raises the seat body to switch to the tip-up state shown in FIG. 9B.
At this time, since the cushion rotation device 25 locks the rotation operation of the seat cushion 2, the seat cushion 2 can be raised integrally by raising the seat back 1 upward.
In the tip-up state, a large cargo space can be secured on the front side of the seat by sliding the upper rail 7b toward the rear side of the seat with respect to the lower rail 7a.

  When the vehicle seat S is switched to the tip-up state shown in FIG. 9B, the seat back 1 returns to the same position as the position in the use state and is locked in the standing posture by the reclining device 13.

<Seat return operation>
Next, an operation for moving the seat body from the tip-up state to the use state will be described with reference to FIG.
When the vehicle seat S is moved from the tip-up state to the use state, as shown in FIG. 10A, for example, the detachable leg 30 that functions as an operation portion is operated.
When the occupant pulls the detachable leg 30 upward about the leg rotation shaft 28a, in other words, by pulling it in the direction away from the seat cushion 2, the cushion rotation device 25 and the leg rotation device 28 are locked. Canceled.
A known cable (not shown) is connected between the attachment / detachment leg 30 and the cushion rotation device 25, and the cable is pulled by the operation of the attachment / detachment leg 30 to release the locked state. Yes.

The seat cushion 2 is rotated downward with respect to the seat back 1 by the urging force of the spiral spring 27 as shown in FIG.
The attachment / detachment leg 30 rotates about the leg rotation shaft 28a to a position where it can be attached to the leg holding member 50 by the urging force of the spring member 28b as the leg rotation device 28 is released, and is attached to the leg holding member 50. Is done.
At this time, the detachable leg 30 moves toward the leg holding member 50 attached to the lower end side of the leg accommodating recess 62 by being guided by the leg accommodating recess 62 and the leg movement restricting portion 63 in the base cover 60. Will come to do.
By the series of operations described above, the vehicle seat S returns to the use state shown in FIG.

<Other embodiments>
In the above embodiment, the storage floor is formed in front of the vehicle seat S, but the storage floor may be formed in the rear of the vehicle seat S without any particular limitation.
In that case, it is desirable that the positional relationship between the seat rotation shaft 12 and the detachable leg 30 in the seat front-rear direction is reversed.
As another example of the storage state, a state in which the seat back 1 is folded and the seat body is flipped up and rotated to one side in the seat width direction may be assumed as the storage state.

  In the above-described embodiment, the storage state of the seat main body has been described as corresponding to the movement state of the claims, but the tip-up state or the like of the present embodiment corresponds to the movement state without particular limitation. It is good as a thing.

  In the above embodiment, as shown in FIG. 4, the center position in the seat width direction of the seat back 1 and the floor connecting member 6 is both offset from the center position of the seat cushion 2 and offset. Of course, it may be offset to the right.

In the above embodiment, as shown in FIG. 3, the support base 40 is fixed to the vehicle body floor via the rail device 7. However, the support base 40 is not particularly limited and is directly fixed to the vehicle body floor without using the rail device 7. May be.
Further, the seat back 1 and the support base 40 may be directly connected via the seat rotation shaft 12 without using the connection bracket 11.

  In the above-described embodiment, a stowable vehicle seat used for an automobile has been described as a specific example. Can also be used.

In the present embodiment, the vehicle seat S according to the present invention has been mainly described.
However, said embodiment is only an example for making an understanding of this invention easy, and does not limit this invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes the equivalents thereof.

S Vehicle seat 1 Seat back 1a, 2a, 3a Cushion pad 1b, 2b, 3b Skin 1c Operation lever 2 Seat cushion 3 Headrest 4 Armrest 5 Buckle 6 Floor connecting member 6a Front floor connecting member 6b Rear floor connecting member 7 Rail device 7a Lower rail 7b Upper rail 7c Operation strap 10 Back frame 11 Connection bracket 11a Bracket cover 12 Seat rotation shaft 13 Reclining device 14 Spiral spring 20 Cushion frame 21 Side frame 21a Outer cushion cover 21b Inner cushion cover 22 Front connection pipe 23 Central connection pipe 24 Pan Frame 25 Cushion rotating device 26 Cushion rotating shaft 27 Spiral spring 28 Leg rotating device 28a Leg rotating shaft 28b Spring member 30 Detachable leg 3 DESCRIPTION OF SYMBOLS 1 Leg main-body part 32 Leg connection part 40 Support base 41 Side base part 42 1st base connection part 43 2nd base connection part 44 Reinforcement base part 45 Holding member support part 50 Leg holding member 51 Side wall part 52 Bottom wall part 53 Curl part 54 Inertia lock device 60 Base cover 61 Front cover 62 Leg receiving recess 63 Leg movement restricting portion 64 Contact portion

Claims (12)

A seat body having a seat back serving as a backrest and a seat cushion coupled to the seat back and serving as a seat;
A vehicle seat that is switchable between a use state in which an occupant can be seated and a movement state in which the seat body is moved from the use state,
Mounted on the car body floor side, and the seat pivot axis, wherein the seat body is connected to one end of the seat front-rear direction of the seat body so as to be rotatable in the direction back and forth sheet,
An detachable leg having an upper end attached to the other end of the seat body and a lower end removably held by a leg holding member provided on the vehicle body floor side;
A support base provided on the vehicle body floor side to which the seat rotation shaft and the leg holding member are attached;
A locking device mounted on the support base and capable of locking in a state where the detachable leg is held by the leg holding member,
The center position in the seat width direction of the back frame serving as the skeleton of the seat back is arranged to be shifted to one side in the seat width direction with respect to the center position of the cushion frame serving as the skeleton of the seat cushion.
The center position of the support base in the seat width direction is arranged to be shifted to the one side with respect to the center position of the cushion frame,
The vehicle seat according to claim 1, wherein the locking device is disposed on the other side in the seat width direction with respect to a center position of the support base. A seat body having a seat back serving as a backrest and a seat cushion coupled to the seat back and serving as a seat;
A vehicle seat that is switchable between a use state in which an occupant can be seated and a movement state in which the seat body is moved from the use state,
Mounted on the car body floor side, and the seat pivot axis, wherein the seat body is connected to one end of the seat front-rear direction of the seat body so as to be rotatable in the direction back and forth sheet,
A support base provided on the vehicle body floor side to which the seat rotation shaft is attached;
A reclining device disposed on the other side in the seat width direction of the vehicle seat, and connecting the seat body to the support base so as to be rotatable about the seat rotation axis;
The center position in the seat width direction of the back frame serving as the skeleton of the seat back is arranged to be shifted to one side in the seat width direction with respect to the center position of the cushion frame serving as the skeleton of the seat cushion.
The center position of the support base in the seat width direction is arranged to be shifted to the one side with respect to the center position of the cushion frame,
The reclining device is arranged on the other side in the seat width direction with respect to the center position of the support base. An upper end is attached to the other end side of the seat body, and a lower end is provided with a detachable leg that is detachably held by a leg holding member provided on the vehicle body floor side,
The vehicle seat according to claim 2, wherein the seat rotation shaft and the leg holding member are attached to the support base. A base cover that covers the support base from above and guides the detachable leg that moves together with the seat body;
It said lateral portion of the one side in the left-right side portions of the seat cushion, the vehicle seat according to claim 1 or 3, characterized in that it is arranged at a position overlapping vertically with the base cover. The movement state is a storage state in which the seat body is moved to a position lower than the vehicle body floor,
A floor connecting member for connecting the vehicle seat on the vehicle body floor;
Center position in the sheet width direction of the floor connecting member according to any one of claims 1 to 4, characterized in that it is arranged to be shifted to the one side with respect to the center position of the cushion frame Vehicle seat. A reclining device disposed on the other side in the seat width direction of the vehicle seat, and connected to the support base so as to be rotatable about the seat rotation axis;
The vehicle seat according to claim 5 , wherein at least a part of the floor connecting member is disposed between the reclining device and a rear end portion of the support base in a seat front-rear direction . The reclining device is mounted on the support base;
A connection bracket for connecting the lower end of the seat back and the reclining device;
The vehicle seat according to claim 6 , further comprising a bracket cover that covers the connecting bracket from the outside. The reclining device includes an operation lever for switching between a locked state in which the seat back is locked and a unlocked state,
The vehicle seat according to claim 6 or 7 , wherein the operation lever is disposed on the other side in the seat width direction in the seat back. The floor connecting member is disposed at the left and right side positions of the vehicle seat,
The floor connecting member on the other side of the sheet width direction, in any one of claims 5 to 8, characterized in that protrudes outside the seat width direction than the floor connecting member in the one side The vehicle seat as described. Left and right lower rails fixed on the vehicle body floor and extending in the front-rear direction of the seat, left and right upper rails slidably supported along the lower rails, and rails that can be locked while the upper rails are supported by the lower rails A locking device,
The rail lock device has an operation strap for switching between a locked state in which the upper rail is locked and a unlocked state,
10. The operation strap according to claim 1, wherein the operation strap is disposed on the other side in the seat width direction on the support base and extends so as to protrude toward the front of the seat . Vehicle seat. With a buckle for attaching a tongue plate provided on the seat belt that restrains the seated occupant,
The said buckle is arrange | positioned on the outer side of a seat width direction rather than the said seat back, and is arrange | positioned with respect to the said seat cushion at the one side of a seat width direction. The vehicle seat described in 1. An outer cushion cover and an inner cushion cover that cover the seat cushion so as to sandwich at least a portion connected to the seat back;
Comprising a armrest supporting the arm of the seated occupant, and
The vehicle seat according to any one of claims 1 to 11, wherein the armrest is disposed on a side portion on one side of the seat back.

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