JP2019085110A - Vehicle seat - Google Patents

Abstract

To provide a vehicle seat capable of securing rigidity of whole seat and considering an arrangement layout in inside of the vehicle.SOLUTION: A vehicle seat S is a seat capable of being stored in a storage recess part which is formed on a vehicle body floor. The vehicle seat S comprises: a support base 40 coupled to the vehicle body floor via floor connection members 6; a seat rotation shaft 12 attached to the support base 40, and to which the seat body is rotatably coupled; and a detachment leg 30 whose upper end is attached to the seat body, and whose lower end is detachably held to a leg holding member 50 of the support base 40. Central positions of a seat back 1 and the floor connection members 6 in a seat width direction are deviated to one side of the seat width direction, to a central position of a seat cushion 2.SELECTED DRAWING: Figure 4

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 lower position than a vehicle body floor.

  Heretofore, a vehicle seat capable of storing the seat back and seat cushion constituting the seat body at a lower position than the vehicle body floor is already known, and among them, the seat body is provided in front of the seat by tilting it forward. There is a vehicle rear seat that can be stored on the storage floor (see, for example, Patent Document 1).

The vehicle seat described in Patent Document 1 is mounted on a vehicle floor, and has a mounting shaft for pivotally supporting the seat back, and a holding groove whose upper end supports the front portion of the seat cushion and whose lower end is fixed to the storage floor And a leg member rotatably held on the housing.
During the storage operation of the seat body, the seatback rotates so as to move the seat cushion to the storage floor with respect to the vehicle body floor, and the leg member rotates around the holding groove in conjunction with the seatback. It can be stored in the storage floor.
Further, the vehicle seat is configured to be switchable to a tip-up state in which the seat cushion is flipped up after the leg member is separated from the holding groove from the use state where the occupant can be seated.

JP, 2009-67309, A

By the way, in the seat which can store a seat main body like patent document 1, the complicated structure is provided by including a reclining mechanism for connecting the seat back in a foldable manner, a storage mechanism for storing the storage floor, and the like. It has become. Therefore, it is necessary to secure the rigidity of the entire seat by devising the arrangement of the component parts.
On the other hand, when installing the seat in the vehicle, the seat back is on one side in the seat width direction with the seat cushion as the reference position, in order to set the layout in consideration of the shape inside the vehicle and the installation space of interior parts. There are cases where a device such as offset arrangement is required.
Therefore, in the seat as described above, it is desired to design in consideration of the layout within the vehicle while securing the rigidity of the entire seat.

Further, in the seat as described in Patent Document 1, the leg member for supporting 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 attached to and detached from the holding groove in the switching operation between the use state and the tip-up state, the full length of the leg member is long, and the swing width of the detached leg member becomes large. It has been difficult to reattach the member to the holding groove.
Therefore, there has been a demand for a vehicle seat that can be easily switched from the use state.

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

The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle seat which secures the rigidity of the entire seat and takes into consideration the layout in the vehicle.
Another object of the present invention is to provide a vehicle seat which can be easily switched from the use state.
Another object of the present invention is to provide a vehicle seat which can be stored in a storage floor with a simple structure.

  According to the vehicle seat of the present invention, the subject includes a seat back having a seat back serving as a backrest, and a seat cushion connected to the seat back serving as a seating portion, and the occupant can sit on A vehicle seat switchable between a state and a movement state in which the seat body is moved from the use state, comprising a floor connecting member for connecting the vehicle seat on a vehicle body floor, The center position of the seat back in the seat width direction is offset to one side in the seat width direction with respect to the center position of the seat cushion, and the center position of the floor connecting member in the seat width direction is the center of the seat cushion The problem is solved by being disposed to be shifted to the one side with respect to the position.

In the above-described vehicle seat, the seatback is disposed offset to one side in the seat width direction with respect to the seat cushion, so it is possible to realize a vehicle seat in which the layout in the vehicle is appropriately considered.
And since the floor connection member is offset and arranged on the same side as the side where the seat back is shifted when the seat cushion is at the reference position, the load of the seated occupant can be efficiently received, and the entire seat can be received. The rigidity of the

At this time, the movement state is a storage state in which the seat body is moved to a lower position than the vehicle body floor, and is attached to the vehicle body floor side, and the seat body is rotatable in the seat longitudinal direction. A seat rotation shaft connected to one end side of the seat body in the seat longitudinal direction and an upper end portion are attached to the other end side of the seat body, and a lower end portion is provided on the vehicle body floor side It is good to have a detachable leg which is detachably held by the member.
With the above configuration, the switching operation becomes favorable when moving the sheet main body between the use state and the storage state.
Since the lower end portion of the detachable leg is disposed not on the storage floor but on the vehicle body floor side as in the prior art, the total length of the detachable leg can be reduced. Since the swing width of the detachable leg in the front-rear direction becomes smaller by the smaller length of the detachable leg, the detachable leg can be easily held by the leg holding member. Therefore, the switching operation becomes easier from the use state.
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.

At this time, a support base provided on the vehicle body floor side and mounted on the support base on which the seat rotation shaft and the leg holding member are attached, and mounted on the support base, with the detachable leg held by the leg holding member A lockable lock device, wherein the central position of the support base in the seat width direction is disposed offset to the one side with respect to the central position of the seat cushion, and the lock device is the center of the support base It is preferable that the sheet be disposed on the other side in the sheet width direction than the position.
As described above, since the support base is offset at a position shifted to one side with respect to the seat cushion, the load of the seated occupant can be efficiently received.
And since the locking device is disposed on the other side in the sheet width direction with respect to the center position of the support base, the space made available by the offset arrangement can be effectively used.

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

At this time, a support base provided on the vehicle body floor side, to which the seat pivot shaft and the leg holding member are attached, and the other side of the vehicle seat in the seat width direction, is provided with respect to the support base. And a reclining device for pivotally connecting the seat body around the seat rotation axis, wherein at least a portion of the floor connecting member is the front and back of the reclining device and the rear end portion of the support base. It is good if it is arranged between directions.
By the above configuration, the support rigidity of the reclining device and the peripheral portion thereof can be enhanced.

At this time, the left and right lower rails fixed on the vehicle body floor and extending in the seat longitudinal direction, the left and right upper rails slidably supported along the lower rail, and the upper rail locked in a state supported by the lower rail Lockable rail lock device, the rail lock device having an operating strap for switching between the locked state where the upper rail is locked and the unlocked state, the operating strap being the support base The upper side may be disposed on the other side in the sheet width direction, and may be extended so as to project toward the front of the sheet.
As described above, the operation strap is disposed on the other side of the support base in the sheet width direction on the support base, and therefore, it is possible to effectively utilize the space made available by the offset arrangement.
And since the operation strap is extended so as to project toward the front of the seat, it becomes a position where it is easy for the seated occupant to pick up.

At this time, the reclining device includes a connection bracket mounted on the support base and connecting 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.
By the above-mentioned bracket cover, it is possible to protect the reclining device and its peripheral portion from external impact and to prevent the entry of foreign matter.

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

At this time, the floor connection member is disposed at the left and right side positions of the vehicle seat, and the floor connection member on the other side in the seat width direction is in the seat width direction than the floor connection member on the one side. It is good if it overhangs outside.
With the above configuration, when the seat cushion is set as the reference position, the seat back is arranged to be shifted to one side in the seat width direction, while the floor connection member on the other side protrudes outward in the seat width direction. As a result, the seat is stably mounted on the vehicle floor.

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

At this time, an outer cushion cover and an inner cushion cover may be provided to cover the seat cushion so as to sandwich at least a portion connected to the seat back.
By the cushion cover, it is possible to protect the connected portion from external impact and to prevent the entry of foreign matter.

At this time, an armrest for supporting an arm of a seated occupant may be provided, and the armrest may be disposed at a side portion on one side of the seat back.
According to the above configuration, it is possible to move the armrest using the space made available by the offset arrangement.

According to the invention of claim 1, it is possible to realize a vehicle seat in which the layout in the vehicle is appropriately considered. Moreover, the load of the seated occupant can be efficiently received to ensure the rigidity of the entire seat.
According to the invention of claim 2, when the sheet body is moved between the use state and the storage state, the switching operation becomes good. In addition, a large storage space can be secured on the storage floor.
According to the third aspect of the invention, the load of the seated occupant can be efficiently received by the offset arrangement of the support base. In addition, the space made available by the offset arrangement can be used effectively.

According to the fourth aspect of the present invention, it is possible to realize a vehicle seat that can be easily switched from the use state by using existing components. Further, the increase in size of the sheet in the sheet width direction can be suppressed.
According to the invention of claim 5, the support rigidity of the reclining device and the periphery thereof can be enhanced.
According to the invention of claim 6, it is possible to make effective use of the space made free by the offset arrangement. Moreover, it becomes a position where the passenger | crew who seated can take an operation strap easily.

According to the seventh aspect of the present invention, it is possible to protect the reclining device and its peripheral portion from external impact and to prevent the entry of foreign matter.
According to the invention of claim 8, it is possible to effectively use the space made free by the offset arrangement.
According to the invention of claim 9, the seat is stably mounted on the vehicle body floor.

According to the invention of claim 10, it is possible to suppress the interference between the component parts, and to effectively use the space made available by the offset arrangement.
According to the eleventh aspect of the present invention, it is possible to protect the connected portion from external impact and to prevent the entry of foreign matter.
According to the invention of claim 12, it is possible to move the armrest by utilizing the space made available by the offset arrangement.

It is a perspective view of a vehicular seat concerning this embodiment. It is a perspective view of a vehicular seat seen from another angle. It is a perspective view of a seat frame used as frame of a vehicular seat. It is a front view of a seat frame. It is a perspective view of a support base of a vehicular seat. It is a perspective view of a base cover which protects a support base. It is a side view of a vehicular seat, and is a figure explaining operation which moves to a storing state from a use condition. It is a side view of a vehicular seat, and is a figure explaining operation which moves to a storing state. It is a side view of a vehicular seat, and is a figure explaining operation which moves to a tip up state from a storing state. It is a side view of a vehicular seat, and is a figure explaining operation which returns to a use state from a tip up state.

Hereinafter, a vehicle seat according to an embodiment of the present invention will be described with reference to FIGS. 1 to 10.
The present embodiment is a vehicle seat capable of storing the seat body on the storage floor, and the seat pivot shaft connected so that the seat body can be pivoted, the upper end is attached to the seat body, and the lower end is A detachable leg held on a leg holding member on a support base and left and right floor connecting members for connecting a seat on a vehicle body floor are provided. The present invention relates to an invention of a vehicle seat characterized in that the central positions are both shifted to one side in the seat width direction with respect to the central position of the seat cushion.
The side where the occupant sits on the seat back of the vehicle seat is the seat front side.

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

The vehicle seat S can be arranged in three forms: a use state where an occupant can sit, a storage state where the seat body is stored in the storage floor, and a tip-up state where the seat body is flipped up. Sheet.
Specifically, when the occupant pulls on the operation lever 1c of FIG. 1 from the use state shown in FIG. 7A, the vehicle seat S is folded forward and the seat body is folded and stored in the storage floor The state is switched to the storage state shown in FIG. Also, from the stored state, the occupant manually raises the seat body upward to switch to the tip-up state shown in FIG. Furthermore, from the tip-up state, when the occupant pulls on the detachable leg 30 functioning as the operation portion, the seat cushion 2 rotates below the seat 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 that supports the back of the occupant from the rear, and the cushion pad 1a is placed on the back frame 10 of FIG. It is configured. An operating lever 1 c is disposed on the upper surface of the seat back 1 on the right side in the sheet width direction.
An armrest 4 for supporting an arm of a seated occupant is attached on the left side of the seatback 1 in the seat width direction.

As shown in FIG. 1, the seat cushion 2 is a seat that supports the occupant from below, and the cushion pad 2a is placed on the cushion frame 20 of FIG. 2 serving as a skeleton, from above the cushion pad 2a. It is covered and constituted by the epidermis 2b.
A buckle 5 for mounting 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 head of the occupant from the rear, and is configured by mounting a cushion pad 3a on a pillar (not shown) as a core material and covering the cushion pad 3a with a skin 3b.

As shown in FIG. 2 and FIG. 3, the floor connection member 6 is disposed at the left and right side positions of the seat, and mainly includes a front floor connection member 6 a and a rear floor connection member 6 b.
The front floor connection member 6a is formed of a curved plate, and as shown in FIG. 3, one end is overlapped and bolted to the front portion of the left and right lower rails 7a, and the other end extends forward of the seat to be on the vehicle floor Is bolted to the
The right front floor connection member 6a extends forward in the seat so as to project slightly outward in the seat width direction, and is disposed so as to be inclined outward in the seat width direction relative to the left front floor connection member 6a. .

As shown in FIG. 2, the rear floor connecting member 6b is formed of a flat plate and has one end attached to the rear portion of the left and right lower rails 7a and the other end extending outward in the seat width direction to be on the vehicle floor It is bolted.
The rear floor connection member 6 b 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, and is fixed on the vehicle body floor via the floor connecting member 6, as shown in FIG. And the upper rails 7b supported on the lower rails 7a so as to be slidable along the lower rails 7a.
A support base 40 is provided on the upper surfaces of the left and right upper rails 7b, and a rail lock device (not shown) capable of locking the upper rails 7b while being supported by the lower rails 7a is mounted on the support base 40.
The rail lock device includes an operation strap 7c for switching between the locked state in which the upper rail 7b is locked and the unlocked state.
The operation strap 7c is disposed on the right side in the sheet width direction, and extends so as to project toward the front of the sheet.

The back frame 10 is formed of a substantially rectangular frame-like body which becomes a framework of the seat back 1 and is connected to the support base 40 at the left and right outer surfaces of the back frame 10 as shown in FIG. Left and right connection brackets 11 are attached.
The connection bracket 11 is formed 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. In addition, on the left and right outer sides of the connection bracket 11, a bracket cover 11a made of resin is attached.
At the lower end of the left connection bracket 11, a seat pivot shaft 12 axially supported by the support base 40 in the left-right direction is provided. At the lower end of the right connection bracket 11, the back frame 10 with respect to the support base 40 is provided. A reclining device 13 is attached which rotatably connects the two.

The reclining device 13 is a known device, and as shown in FIG. 3, is disposed on the left and right inner side surfaces of the connection bracket 11 to suppress interference with the cushion frame 20 in the left and 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 about the seat rotation shaft 12 to urge the storage frame.
The seat pivot shaft 12 is pivotally supported on the back frame 10 side and the support base 40 side in the left-right direction, 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 in which the pivoting operation of the back frame 10 is locked, and the back frame 10 is locked in the upright position in FIG. 1 and the locked state is released by operating the control lever 1c. The back frame 10 can be rotated forward by the biasing force of the spiral spring 14 and folded to the vehicle floor side.

  The cushion frame 20 is formed of a substantially rectangular frame-like body serving as a framework of the seat cushion 2 and, as shown in FIG. 3, connects the side frames 21 disposed on the left and right sides and the front portion of each side frame 21. Mainly composed of a front connecting pipe 22, a central connecting pipe 23 connecting central portions of the side frames in the front-rear direction, and a pan frame 24 as a plate-like frame connecting the front connecting pipe 22 and the central connecting pipe 23; It is configured.

The side frame 21 is formed of a sheet metal member extending in the longitudinal direction of the seat, and 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. The cushion rotation device 25 is attached.
In addition, as shown in FIG. 2, an outer cushion cover 21 a and an inner cushion cover 21 b are attached to the rear portion of the side frame 21 so as to surround the side frame 21.
The front connecting pipe 22 is formed of a U-shaped pipe member, and on the left and right inner side surfaces thereof, a leg rotating device 28 for rotatably connecting the detachable leg 30 to the cushion frame 20 is attached.

The cushion rotation device 25 is made of a known device, and as shown in FIG. 3, a cushion rotation shaft 26 and a spiral spring 27 that biases the cushion frame 20 downward about the cushion rotation shaft 26; Is equipped.
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, 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 pivoting device 25 can be switched to a locked state in which the pivoting motion of the cushion frame 20 is locked.
As shown in FIG. 8C, when the seat body is stored in the storage floor, specifically, when the back frame 10 is folded to the cushion frame 20 side, as shown in FIG. The pivoting motion 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 biasing force of the spiral spring 27. It can be rotated.

The leg pivoting device 28 is a spring member that biases the leg pivot shaft 28 a and the detachable leg 30 on the opposite side of the cushion frame 20 with the leg pivot shaft 28 a as a center, in other words, a spring away from the cushion frame 20. And 28b.
The leg pivot shaft 28a is pivotally supported by the front connection pipe 22 and the upper end portion of the detachable leg 30 in the left-right direction, one end of the spring member 28b is locked to the cushion frame 20 side, and the other end is a detachable leg It is locked to the 30 side.
The leg pivoting device 28 is switchable to a locked state for locking the pivoting motion of the detachable leg 30, and as shown in FIG. 8A, the detachable leg 30 is disengaged from the leg holding member 50, and the cushion frame When stored on the 20 side, the pivotal movement of the detachable leg 30 is locked. Then, as shown in FIG. 10 (a), when the locked detachable leg 30 is pulled, the locked state is released and the detachable leg 30 is returned to the use state by the biasing force of the spring member 28b. It can be moved to a position where it can be attached to 50.

As shown in FIG. 3, the detachable leg 30 is a substantially U-shaped pipe member for supporting the seat cushion 2, and connects the lower end of each leg main portion 31 to the leg main portions 31 disposed on the left and right sides. And a leg connecting portion 32.
The upper end of the leg main body portion 31 is connected to the left and right inner side surfaces substantially at the central portion in the front-rear direction of the cushion frame 20, and the substantially central portion in the lateral direction of the leg connecting portion 32 is detachably held by the leg holding member 50. It is done.
The upper end portion of the detachable leg 30 projects forward from the lower end portion of the detachable leg 30 in the seat, 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 for supporting the seat body, and as shown in FIG. 5, the left and right side base portions 41 disposed along the upper rails 7b on the left and right sides, and the front portions of the side base portions 41. A first base connecting portion 42 to be connected, a second base connecting portion 43 connecting substantially central portions of the side base portions 41, left and right reinforcing base portions 44 attached to upper surfaces of the side base portions 41, and And a holding member supporting portion 45 which connects the base connecting portion 42 and the second base connecting portion 43 and supports the leg holding member 50.

As shown in FIG. 5, the side base portion 41 and the reinforcement base portion 44 are formed of a substantially crank-shaped sheet metal member elongated in the front-rear direction, the side base portion 41 is connected to the upper surface of the upper rail 7b, A closed cross-sectional structure is formed by overlapping the side base portion 41 at the top and bottom.
The left and right ends of each of the first base connecting portion 42 and the second base connecting portion 43 are sandwiched and connected by the side base portion 41 and the reinforcing base portion 44.
The holding member supporting portion 45 is a curved sheet metal member for supporting the leg holding member 50, and 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. There is.

The leg holding member 50 is, as shown in FIGS. 3 and 5, a substantially U-shaped clip member for detachably holding the detachable leg 30, and the holding member is supported at a position where its opening portion is directed obliquely upward and forward. It is supported by the part 45.
The leg holding member 50 includes a pair of side wall portions 51 and a bottom wall portion 52 connecting the lower end portions of the side wall portions 51.
Each side wall 51 is bent in the direction approaching each other from the lower end to the upper end, in other words, it is bent in the inside direction of the opening so as to narrow the opening of the leg holding member 50 At the upper end portion, a curled portion 53 which is bent in the outward direction of the opening is formed.
The pair of curled portions 53 respectively penetrate the openings provided in the base cover 60 and are exposed to the outside on the detachable leg 30 side.

At a portion adjacent to the leg holding member 50, an inertial lock device 54 is disposed which locks the leg connecting portion 32 of the detachable leg 30 in a state of being held by the leg holding member 50 at the time of a rear collision of the vehicle.
The inertial 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 longitudinal direction.
In addition, the inertial lock device 54 is disposed in a vacant space located on the left side in the seat width direction with respect to the central 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 seat front side and a rear cover disposed behind the front cover 61 , Is composed of. The front cover 61 and the rear cover are snap fit-coupled.

The front cover 61 has a guide shape for guiding the detachable leg 30 moving with the seat body.
Specifically, the front cover 61 is disposed rearward of the leg accommodating recess 62 for accommodating the detachable leg 30 and the leg accommodating recess 62, and the detachable leg 30 is moved rearward relative to the leg accommodating recess 62. A leg movement restricting portion 63 for restricting, and an abutting portion 64 which is disposed in front of the seat relative to the leg accommodation concave portion 62 and which can abut on the left side portion of the seat cushion 2 are provided.

The leg accommodation recess 62 is 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 where its opening is directed obliquely upward and forward.
Square-shaped openings are formed in the front and rear side walls of the leg housing recess 62, and a part of the leg holding member 50 is inserted through the openings from the back surface side of the base cover 60, as shown in FIG. Exposed to the outside.
Further, as shown in FIG. 4, an opening extending vertically is formed in the rear side wall, and a part of the inertial lock device 54 is externally exposed from the back side of the base cover 60 through the opening. It is exposed.

As shown in FIG. 4, the leg movement restricting portion 63 includes a portion protruding from the substantially central portion of the upper surface of the base cover 60 toward the seat front side, and is continuously formed from the rear portion of the leg receiving recess 62. .
The leg movement restricting portion 63 restricts the rearward movement of the removable leg 30 when the removable leg 30 is accommodated in the leg accommodating recess 62, and can guide the removable leg 30 to the leg accommodating recess 62 side.
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 vertically.

In the above configuration, as shown in FIG. 4, the central position of the seat back 1 in the seat width direction is offset to the left in the seat width direction with respect to the central position of the seat cushion 2.
The center position of the pair of floor connection members 6 in the seat width direction is offset to the left with respect to the center position of the seat cushion 2 in the same manner.
Therefore, it is possible to realize a seat that secures the rigidity of the seat while considering the layout inside 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 affect the layout layout in the vehicle, the layout can be set with priority given to the rigidity of the seat.

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

<Sheet storage operation>
Next, an operation of moving the sheet main body from the use state to the storage state will be described based on FIGS. 7 and 8. 7 and 8, the reclining device 13, the cushion rotating device 25 and the leg rotating device 28 indicate the locked state when illustrated by the black circle, and the unlocked state when illustrated by the white circle. It shall be shown. The same applies to FIG. 9 and FIG.

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

When moving the vehicle seat S from the use state to the storage state, for example, the operation lever 1 c of FIG. 1 provided on the upper surface of the seat back 1 is operated.
When the occupant operates the operation lever 1c, as shown in FIG. 7 (b), the locked state of the reclining device 13 is released, and the seat back 1 receives the seat cushion 2 by the biasing force of the spiral spring 14. The sheet forward rotation is started about the sheet rotation shaft 12 so as to move the sheet up to the end.
The detachable leg 30 starts to rotate toward the seat cushion 2 with respect to the seat cushion 2 around the leg pivot shaft 28 a in conjunction with the rotation of the seat back 1. At this time, since the detachable leg 30 is in a stretched state between the seat cushion 2 and the vehicle body floor side, the seat cushion 2 and the seat back 1 can be moved stably.
A known cable (not shown) is connected between the control lever 1c and the reclining device 13, and the cable is pulled by the operation of the control lever 1c to release the locked state.

When the seat back 1 reaches a predetermined rotational position as shown in FIG. 8A, the detachable leg 30 is disengaged from the leg holding member 50.
The detached detachable leg 30 runs on the upper surface of the base cover 60 and rotates so as to be folded toward the seat cushion 2 about the leg pivot shaft 28a against the biasing force of the spring member 28b. Then, when the detachable leg 30 reaches a predetermined rotational position, the detachable leg 30 is locked by the leg pivoting device 28 in a state of being stored on the seat cushion 2 side.

  Furthermore, as shown in FIG. 8B, when the seat back 1 reaches the predetermined rotational position, the front portion of the seat cushion 2 abuts on the storage floor surface earlier than the detachable leg 30.

By the above-described series of operations, as shown in FIG. 8C, the seat body is stored in the storage floor, and the vehicle seat S is switched to the storage state.
The seat cushion 2 is locked by the cushion rotation device 25 when in the stored state, specifically, when the seat back 1 is folded toward 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.

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

  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 use, and is locked by the reclining device 13 in the upright posture.

<Sheet return operation>
Next, an operation of moving the sheet body from the tip-up state to the use state will be described based on 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 functioning as an operation portion is operated.
The lock state of the cushion turning device 25 and the leg turning device 28 is obtained by pulling the mounting leg 30 upward around the leg turning shaft 28a, in other words, pulling it away from the seat cushion 2 side. It is released.
A known cable (not shown) is connected between the detachable leg 30 and the cushion rotation device 25. The cable is pulled by the operation of the detachable leg 30 to release the locked state. There is.

The seat cushion 2 is rotated downward with respect to the seat back 1 by the biasing force of the spiral spring 27 as shown in FIG. 10B when the cushion rotation device 25 is released.
The detachable leg 30 is rotated about the leg pivot shaft 28 a to a position where it can be attached to the leg holding member 50 by the biasing force of the spring member 28 b with the release of the leg pivoting device 28 and attached to the leg holding member 50. Be done.
At this time, the removable leg 30 is moved 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. You will come to
By the series of operations, 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. However, the storage floor may be formed behind the vehicle seat S without being particularly limited.
In such a case, it is desirable that the positional relationship between the seat pivot shaft 12 and the mounting and demounting legs 30 be reversed.
Further, as another embodiment of the storage state, a state in which the seat back 1 is folded and the sheet body is flipped up and rotated to one side in the sheet width direction may be assumed as the storage state.

  In the above embodiment, the storage state of the sheet main body has been described as being equivalent to the movement state in the claims, but the tip-up state or the like of this embodiment corresponds to the movement state without being particularly limited. It is good also as a thing.

  In the above embodiment, as shown in FIG. 4, the central positions of the seat back 1 and the floor connecting member 6 in the seat width direction are both offset to the left with respect to the central position of the seat cushion 2. Of course, they may be offset to the right side.

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, but it is not particularly limited, and the rail device 7 is not needed and fixed directly to the vehicle body floor It may be done.
Further, the seatback 1 and the support base 40 may be directly connected via the sheet rotation shaft 12 without the need for the connection bracket 11.

  Although the said embodiment demonstrated the stowable vehicle seat used for a motor vehicle as a specific example, it is not limited to this, In addition to seats for vehicles, such as a train and a bus, seats for vehicles, 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 the 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 the present invention naturally includes the equivalents thereof.

S Vehicle Seat 1 Seat Back 1a, 2a, 3a Cushion Pad 1b, 2b, 3b Skin 1c Operating Lever 2 Seat Cushion 3 Headrest 4 Armrest 5 Buckle 6 Floor Coupling Member 6a Front Floor Coupling Member 6b Rear Floor Coupling 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 Swirl spring 20 Cushion frame 21 Side frame 21a Outer cushion cover 21b Outer cushion cover 22 Front connection pipe 23 Central connection pipe 24 Pan Frame 25 Cushion rotation device 26 Cushion rotation shaft 27 Spiral spring 28 Leg rotation device 28a Leg rotation shaft 28b Spring member 30 Detachable leg 3 Reference Signs List 1 leg main body 32 leg connecting portion 40 support base 41 side base portion 42 first base connecting portion 43 second base connecting portion 44 reinforcing base portion 45 holding member support portion 50 leg holding member 51 side wall portion 52 bottom wall portion 53 curled portion 54 Inertial Locking Device 60 Base Cover 61 Front Cover 62 Leg Accommodating Concave 63 Leg Movement Regulating Part 64 Contact Part

Claims (12)

A seat body having a seat back serving as a backrest and a seat cushion connected to the seat back serving as a seating portion;
A vehicle seat that can be switched between a use state in which an occupant can sit and a movement state in which the seat body is moved from the use state,
A floor connecting member for connecting the vehicle seat on a vehicle body floor;
The center position of the seat back in the seat width direction is offset from the center position of the seat cushion to one side in the seat width direction.
A center position of the floor connecting member in a seat width direction is disposed to be shifted to the one side with respect to a center position of the seat cushion. The movement state is a storage state in which the seat body is moved to a lower position than the vehicle body floor,
A sheet rotation shaft attached to the vehicle body floor side and coupled to one end side of the sheet body in the front-rear direction so that the sheet body can rotate in the seat front-rear direction;
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 which is detachably held by a leg holding member provided on the vehicle body floor side. The vehicle seat according to 1. A support base provided on the vehicle body floor side, to which the seat pivot shaft and the leg holding member are attached;
And a lock device mounted on the support base and lockable while the detachable leg is held by the leg holding member.
The center position of the support base in the seat width direction is disposed offset to the one side with respect to the center position of the seat cushion,
The vehicle seat according to claim 2, wherein the locking device is disposed on the other side in the seat width direction than the central position of the support base. And a base cover that covers the support base from above and guides the detachable leg that moves with the seat body.
The vehicle seat according to claim 3, wherein the one side portion of the left and right side portions of the seat cushion is disposed at a position overlapping the base cover vertically. A support base provided on the vehicle body floor side, to which the seat pivot shaft and the leg holding member are attached;
A reclining device disposed on the other side in the seat width direction of the vehicle seat and rotatably connecting the seat main body to the support base about the seat pivot axis;
The vehicle seat according to claim 2, wherein at least a part of the floor connecting member is disposed between the reclining device and the rear end portion of the support base in the front-rear direction of the seat. The left and right lower rails fixed on the vehicle body floor and extending in the seat longitudinal direction, the left and right upper rails slidably supported along the lower rail, and the rail lockable with the upper rail supported by the lower rail And a lock device,
The rail lock device has an operation strap for switching between a locked state where the upper rail is locked and an unlocked state.
The vehicle seat according to claim 5, wherein the operation strap is disposed on the other side of the support base in the seat width direction and extends to project forward from the seat. The reclining device is mounted on the support base,
A connection bracket connecting the lower end portion of the seat back and the reclining device;
The vehicle seat according to claim 5 or 6, further comprising: a bracket cover that covers the connection bracket from the outside. The reclining device includes an operation lever for switching between a locked state in which the seatback is locked and a unlocked state.
The vehicle seat according to any one of claims 5 to 7, wherein the operation lever is disposed on the other side in the seat width direction in the seat back. The floor connection member is disposed at left and right side positions of the vehicle seat,
9. The floor connection member on the other side in the sheet width direction protrudes to the outside in the sheet width direction more than the floor connection member on the one side. Vehicle seat as described. A buckle for attaching a tongue plate provided on a seat belt for restraining a seated occupant;
10. The buckle according to claim 1, wherein the buckle is disposed outside the seat back in the seat width direction, and is disposed on one side of the seat cushion in the seat width direction. Vehicle seat as described in.   The vehicle according to any one of claims 1 to 10, further comprising an outer cushion cover and an inner cushion cover covering the seat cushion so as to sandwich at least a portion connected to the seat back. Seat. An armrest for supporting the arm of a seated occupant;
The vehicle seat according to any one of claims 1 to 11, wherein the armrest is disposed at a side portion on one side of the seat back.

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