JP6271866B2 - Vehicle seat - Google Patents

Description

The present invention relates to a vehicle seat, in particular, the seat back and the seat cushion about the retract and possible vehicle seat.

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

The vehicle seat described in Patent Document 1 is attached to a vehicle body floor, is rotatably supported by a mounting shaft that rotatably supports a seat back, and a holding groove fixed to the storage floor, and is a front portion of the seat cushion. And a retractable leg member that supports the storage structure.
When the seat body is retracted, the seat back rotates to move the seat cushion to the storage floor relative to the vehicle floor, and the retractable leg member rotates around the holding groove in conjunction with the seat back. The main body can be stored on the storage floor.
Further, the vehicle seat can be switched from a seatable state in which an occupant can be seated to a tip-up state in which the seat cushion is flipped upward after the retractable leg member is detached from the holding groove.

JP 2009-67309 A

However, in the seat that can store the seat body on the storage floor as in Patent Document 1, not only the vehicle body floor surface on which the seat body is installed, but also the leg member for rotatably supporting the seat back on the storage floor surface In addition, components such as holding grooves are attached, and the storage structure is complicated to store the seat body.
In particular, the holding groove that holds the lower end of the leg member is fixed to the storage floor, and the total length of the leg member that supports the seat cushion becomes long, so that the seat cushion that receives the seating load of the seated person, the leg member, And consideration for improving the support rigidity of the holding groove is required.
Therefore, there has been a demand for a vehicle seat that can be stored on the storage floor and has a simple structure and improved support rigidity of the seat body. In addition, a vehicle seat capable of securing a wide storage space has been desired.

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.
Therefore, when switching the seat body between the seatable state and the tip-up state, an operation to detach or attach the leg member from the holding groove is required, but the total length of the leg member is long, The swinging width of the leg member in the front-rear direction is increased, and the operation of mounting the leg member in the holding groove is difficult.
Therefore, a vehicle seat that can be easily switched from a seatable state 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 that can be stored on a storage floor with a simple structure and improved support rigidity of the seat body. There is to do.
Another object of the present invention is to provide a vehicle seat that can secure a large storage space without disposing a storage structure component on the storage floor surface.
Another object of the present invention is to provide a vehicle seat that can be easily switched from a seatable state.

According to the vehicle seat of the present invention, the subject is a vehicle seat capable of storing a seat back and a seat cushion coupled to the seat back, and is provided on a vehicle body floor, and is provided at a lower end of the seat back. A support base to which the side is connected, a top end is attached to the seat cushion, a lower end is connected to the support base, and a leg is attached to the support base and detachably holds the lower end side of the support leg A holding member that moves so that the vehicle seat is in a stowed state and the seat back reaches a predetermined position; and a leg holding member that disengages the support leg . One end side is attached to the lower end side of the seat back, and the other end side is connected to the support base via a connection bracket that is rotatably connected to the support base. It has been sintered, is solved by.

With the above configuration, the support base is provided on the vehicle body floor side and supports the seat back via the coupling bracket, the support leg that supports the seat cushion, and the lower end side of the support leg is detachably held. comprising a leg support member, the, by inch simple structure, the seat back and the seat cushion constitutes a seat body can be provided retract and possible vehicle seat.
In addition, since the leg holding member is mounted on a support base that is provided on the vehicle body floor side and can support the seat back via the connection bracket and has relatively high support rigidity, the leg holding member and the support leg are supported. Stiffness is improved. As a result, the support rigidity of the seat body can be improved.
Further, components become the support base of the housing structure, the support legs, and for placing all the leg support member to the vehicle body floor side and can be secured storage space have wide.
Further, since the leg support member is disposed in the vehicle body floor side, as a result, it is possible to reduce the overall length of the support legs. Since the swinging width of the support leg in the front-rear direction is reduced by the amount of the support leg being small, the support leg is easily held by the leg holding member. Accordingly, the vehicle seat can be easily switched from the seatable state.

At this time, the support base includes left and right side base portions to which the left and right connection brackets disposed on the side of the seat are respectively attached, a first base connection portion that connects the left and right side base portions, and the first A second base connecting portion that connects the left and right side base portions at a position rearward of the base connecting portion, and the leg holding member is connected to the first base connecting portion and the second base connecting portion in the seat front-rear direction. It is good to arrange between the parts.
With the above configuration, the support rigidity of the leg holding member is improved, and the support rigidity of the seat body is improved.

At this time, the first base connecting portion and the second base connecting portion may extend in the sheet width direction and be arranged substantially parallel to each other.
With the above configuration, the first base connecting portion and the second base connecting portion constituting the support base can be arranged in a compact manner, and the seat can be downsized.

At this time, the support base may include a holding member support portion that extends in the front-rear direction of the seat to connect the first base connection portion and the second base connection portion and to which the leg holding member is attached.
With the above configuration, the support rigidity of the leg holding member is improved, and the support rigidity of the seat body is improved.

At this time, the support base may include a reinforcement base portion attached above the side base portion, and the side base portion and the reinforcement base portion may form a closed cross-sectional structure.
With the above configuration, the support rigidity of the support base is improved, and the support rigidity of the seat body is improved.

At this time, the support base includes a plurality of base attaching portions for attaching the side base portion and the reinforcing base portion, and a portion of the reinforcing base portion positioned between the plurality of base attaching portions is vertically It is preferable to form a convex portion protruding in the direction.
With the above-described configuration, the attachment rigidity of the plurality of base attachment portions for attaching the side base portion and the reinforcement base portion is improved.

At this time, the left and right reinforcing base portions sandwich the first base connecting portion and the second base connecting portion with the side base portion, and contact the second base connecting portion of the reinforcing base portions. The portion is preferably formed with a protruding portion extending in the vertical direction along the outer surface of the second base connecting portion, and the protruding portion may extend to the outer end portion in the sheet width direction.
With the above configuration, the connection rigidity of the reinforcement base portion and the second base connection portion is improved.

At this time, the side base part may be connected to a lower part of the first base connecting part, and the reinforcing base part may be connected to an upper part of the first base connecting part.
With the above configuration, the side base portion and the reinforcing base portion are arranged at different positions in the connecting portion with the first base connecting portion, for example, compared with the case where they are arranged at positions overlapping each other, Easy assembly.

At this time, it is preferable that the protruding portion of the reinforcing base portion extends to a position that does not overlap the leg holding member in the seat width direction.
With the above configuration, the support base having the reinforcing base portion as a component and the support leg that is detachably held by the leg holding member are arranged without interfering with each other.

At this time, a back rotation shaft that is a rotation shaft of the seat back is attached to the support base, and the back rotation shaft is provided on the lower end side of the seat back, and the reinforcement in the seat width direction. The side base portion is pivotally supported by the base portion, and the side base portion is disposed outside the reinforcing base portion in the seat width direction. A cutout portion is formed in a portion of the side base portion facing the back rotation shaft. Good to have been.
With the above configuration, the assembling property is improved when the back rotation shaft is attached from the side surface of the seat.

At this time, the leg holding member may be arranged in front of the seat with respect to the back rotation shaft.
With the above configuration, the leg holding member that holds the support leg of the seat cushion and the back rotation shaft that is the support position where the seat back is supported by the support base are arranged apart from each other in the seat front-rear direction. Support rigidity of the main body is improved.

At this time, the seat back and the seat cushion that is pivotally connected to the seat back are movable up to a tip-up state, and the support leg is in the tip-up state. The first base connecting portion may be disposed behind the seat.
With the above configuration, when the seat back, the seat cushion, and the support leg attached to the seat cushion are in a tip-up state in which the seat leg is flipped upward, the seat body is disposed relatively rearward. Storage space can be secured.

At this time, when the occupant is in a seatable state, the front end portion of the seat cushion may be disposed in front of the seat with respect to the first base connecting portion.
With the above configuration, a space can be ensured below the seat cushion and on the front side of the seat of the first base connecting portion, and the seated person can bend and extend the legs relatively freely. In addition, a seating space for the occupant can be secured.

At this time, the connection bracket may have a closed cross-sectional structure.
With the above configuration, the support rigidity of the connection bracket is improved, and the support rigidity of the seat body is improved.

According to the first aspect of the present invention, the support base is provided on the vehicle body floor side and supports the seat back via the connection bracket, the support leg that supports the seat cushion, and the lower end side of the support leg that is attached to the support base. and a leg support member for detachably holding the by inch simple structure, the seat back and the seat cushion constitutes a seat body can provide retract and possible vehicle seat.
In addition, since the leg holding member is mounted on a support base that is provided on the vehicle body floor side and can support the seat back via the connection bracket and has relatively high support rigidity, the leg holding member and the support leg are supported. Stiffness is improved. As a result, the support rigidity of the seat body can be improved.
Further, components become the support base of the housing structure, the support legs, and for placing all the leg support member to the vehicle body floor side and can be secured storage space have wide.
Further, since the leg support member is disposed in the vehicle body floor side, as a result, it is possible to reduce the overall length of the support legs. Since the swinging width of the support leg in the front-rear direction is reduced by the amount of the support leg being small, the support leg is easily held by the leg holding member. Accordingly, the vehicle seat can be easily switched from the seatable state.

According to the invention of claim 2, the support rigidity of the leg holding member is improved, and the support rigidity of the seat body is improved.
According to invention of Claim 3, the 1st base connection part and 2nd base connection part which comprise a support base can be arrange | positioned compactly, and size reduction of a sheet | seat is attained.
According to the invention of claim 4, the support rigidity of the leg holding member is improved, and the support rigidity of the seat body is improved.

According to the invention of claim 5, the support rigidity of the support base is improved, and the support rigidity of the seat body is improved.
According to the sixth aspect of the invention, the mounting rigidity of the plurality of base mounting portions for mounting the side base portion and the reinforcing base portion is improved.
According to invention of Claim 7, the connection rigidity of a reinforcement base part and a 2nd base connection part improves.

According to the eighth aspect of the present invention, the side base portion and the reinforcing base portion are arranged at different positions in the connecting portion with the first base connecting portion. Compared with, assembly becomes easier.
According to invention of Claim 9, the support base which makes a reinforcement base part a component, and the support leg hold | maintained so that attachment or detachment to a leg holding member are arrange | positioned without interfering with each other.
According to the invention of claim 10, the assembling property is improved when the back rotation shaft is attached from the side surface side of the seat.

According to the invention of claim 11, the leg holding member that holds the support leg of the seat cushion and the back rotation shaft serving as a support position where the seat back is supported by the support base are arranged apart from each other in the seat front-rear direction. Therefore, the support rigidity of the seat body is improved.
According to the twelfth aspect of the present invention, when the seat back, the seat cushion, and the support leg attached to the seat cushion are in a tip-up state in which the seat leg is flipped upward, the seat body is disposed relatively rearward. Therefore, a storage space in front of the seat can be secured.

According to the invention of claim 13, it is possible to secure a space below the seat cushion and on the front side of the seat of the first base connecting portion, so that the seated person can bend and extend the legs relatively freely. become. In addition, a seating space for the occupant can be secured.
According to the invention of claim 14, the support rigidity of the connecting bracket is improved and the support rigidity of the seat body is improved.

1 is a perspective view of a vehicle seat according to the present invention. It is a perspective view of the seat frame used as the frame of a vehicular seat. It is a perspective view of a seat frame, and is a partial enlarged view. It is a front view of a seat frame and is a partially enlarged view. It is a side view of a vehicle seat, and is a diagram for explaining an operation of moving from a seatable state to a stored state. It is a side view of a vehicle seat, and is a diagram for explaining an operation of moving to a stored 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 illustrating an operation of returning from a tip-up state to a seatable state.

The present embodiment is a vehicle seat that can store a seat body on a storage floor, and includes a support base that is attached to the vehicle body floor side and supports the seat back via a connection bracket. A leg holding member that is rotatable so as to move the seat cushion to the storage floor side about the attached back rotation shaft, and that the support base detachably holds the lower end of the support leg that supports the seat cushion. The present invention relates to a vehicle seat according to the invention.
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 FIG. 1, the vehicle seat S is attached to a vehicle body floor as shown in FIG. 2 and a seat body including a seat back 1, a seat cushion 2, and a headrest 3. Left and right rail devices 4 that are supported in a movable state, a support leg 30 that is mounted between the seat body and the rail device 4 and supports the seat cushion 2, and a support base that rotatably supports the seat back 1. 40 and a leg holding member 50 that is attached to the support base 40 and holds the support leg 30 in a detachable manner.
The vehicle seat S includes a reclining device 13 that rotatably connects the seat back 1 to the support base 40, and a cushion lock device 25 that rotatably connects the seat cushion 2 to the seat back 1. And are attached.
As shown in FIG. 5, a concave storage floor formed at a lower position than the vehicle body floor is provided on the front side of the vehicle seat S.

The vehicle seat S has three types of seat arrangements: a seatable 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 possible sheet.
Specifically, when the occupant pulls an operation lever (not shown) from the seatable state shown in FIG. 5A, the seat body is folded forward and folded and stored in the storage floor. The storage state is switched to that shown in FIG. Further, when the occupant manually raises the seat body upward from the stored state, the state is switched to the tip-up state shown in FIG. Further, when the occupant pulls the support leg 30 functioning as an operation lever from the tip-up state, the seat cushion 2 rotates downward with respect to the seat back 1 and returns to the seatable state. Details will be described later.

As shown in FIG. 1, the seat back 1 is a backrest part that supports the back of the occupant from the back, and the cushion pad 1a is placed on the back frame 10 shown in FIG. It is configured to be covered.
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. 2 serving as a skeleton, and is covered with the skin 2b from above the cushion pad 2a. It is configured.
The headrest 3 is a head that supports the occupant's head from the rear, 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.

The rail device 4 is disposed between the seat main body and the vehicle body floor in the vertical direction. As shown in FIG. 2, the rail device 4 is fixed to the vehicle floor and extends to the left and right lower rails 4a and 4a. The upper and lower upper rails 4b are slidably supported along the upper and lower rails 4b.
Lower rail fixing portions 4c for fixing to the vehicle body floor are respectively attached to the bottom surfaces of the left and right lower rails 4a, and a support base 40 is constructed on the upper surfaces of the left and right upper rails 4b.
The rail device 4 is provided with a lock member (not shown) for locking the upper rail 4b so as not to slide and an operation lever (not shown) for releasing the lock state of the lock member.

The back frame 10 is formed of a substantially rectangular frame serving as a skeleton of the seat back 1, and is connected to the 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 sheet metal member extending in the vertical direction, and is formed in a substantially bow shape when viewed from the side of the seat. The upper end of the connection bracket 11 is attached to the back frame 10 and the lower end is supported. It is attached to the base 40.
As shown in FIG. 2, the connecting bracket 11 includes an outer bracket portion 11a having a substantially U-shaped cross section disposed on the left and right outer sides, and an inner side having a substantially U-shaped cross section disposed on the left and right inner sides of the outer bracket portion 11a. The outer bracket portion 11a and the inner bracket portion 11b partially overlap each other so as to have a substantially rectangular shape in cross section to form a closed cross-sectional structure.

The upper end portion of the connection bracket 11 is disposed between the back frame 10 and the cushion frame 20 in the seat left-right direction.
A back rotating shaft 12 pivotally supported by the support base 40 in the left-right direction is provided at the lower end portion of the left connecting bracket 11, and the back frame with respect to the support base 40 is provided at the lower end portion of the right connecting bracket 11. A reclining device 13 for connecting the 10 to be rotatable is attached.

As shown in FIG. 2, when the upper rail 4b slides most rearward with respect to the lower rail 4a, the back rotating shaft 12 has a lower rail fixing portion 4c on the front side and a lower rail fixing portion 4c on the rear side. It is arrange | positioned between these, and the support rigidity of a sheet | seat main body is ensured.
Further, as shown in FIG. 3, the back rotating shaft 12 is arranged behind the lower rail fixing portion 4c on the front side even when the upper rail 4b slides most forward with respect to the lower rail 4a. The support rigidity of the seat body is secured.

As shown in FIG. 2, 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 back rotating shaft 13a and a spiral spring 13b that rotates the back frame 10 forward about the back rotating shaft 13a and biases the back frame 10 to a stored state.
The back rotation shaft 13a 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 13b is locked to the back frame 10 side, and the other end is the support base 40. It is locked to the side.
The reclining device 13 can be switched to a locked state that locks the rotational movement of the back frame 10, locks the back frame 10 in an upright state, and releases the locked state by operating an operation lever (not shown). The back frame 10 can be rotated forward by the urging force of the spiral spring 13b and folded to the support base 40 side.

The cushion frame 20 is formed of a substantially rectangular frame serving as a skeleton of the seat cushion 2, and as shown in FIG. 2, left and right side frames 21 arranged on the left and right sides, and a front portion of each side frame 21. From the front connection pipe 22 to be connected, the central connection pipe 23 to connect the substantially central portions of the side frames in the front-rear direction, and the pan frame 24 as a plate-like frame to connect the front connection pipe 22 and the central connection pipe 23 It is mainly composed.
The side frame 21 is made of a sheet metal member extending in the front-rear direction, and a front portion thereof is connected to a front connection pipe 22, and a cushion frame 20 is rotated with respect to the back frame 10 at a rear portion and an upper end portion thereof. A cushion lock device 25 that is movably connected is attached.
Note that flanges (not shown) bent to the left and right outer sides are formed on the outer edge of the side frame 21 when viewed from the side of the seat, thereby enhancing the support rigidity of the front connecting pipe 22 and the back frame 10.

As shown in FIG. 2, the cushion lock device 25 includes a cushion rotation shaft 25a and a spiral spring 25b that urges the cushion frame 20 downward about the cushion rotation shaft 25a. I have.
The cushion rotation shaft 25a is pivotally supported by the back frame 10 and the cushion frame 20 in the left-right direction, and one end of the spiral spring 25b is locked to the back frame 10 side, and the other end is on the cushion frame 20 side. It is locked.
The cushion lock device 25 can be switched to a locked state that locks the rotational movement of the cushion frame 20.
As shown in FIG. 6 (c), the cushion lock device 25 is used when the seat body is stored on the storage floor, specifically, when the back frame 10 is folded to the cushion frame 20 side. The rotation operation of the frame 20 is locked. Then, as shown in FIG. 8, when the support leg 30 functioning as an operation lever is pulled, the locked state is released, and the cushion frame 20 is rotated downward with respect to the back frame 10 by the urging force of the spiral spring 25b. Can do.

As shown in FIG. 2, the front connection pipe 22 is formed of a substantially U-shaped pipe member, and a leg lock device 26 that rotatably connects a support leg 30 to the cushion frame 20 on the left and right inner surfaces thereof. Is attached.
The leg lock device 26 includes a leg rotation shaft 26a and a spring member 26b that urges the support leg 30 on the opposite side of the cushion frame 20 around the leg rotation shaft 26a, in other words, in a direction away from the cushion frame 20. And.
The leg rotation shaft 26a is pivotally supported by the front connection pipe 22 and the upper end portion of the support leg 30 in the left-right direction, and one end of the spring member 26b is locked to the cushion frame 20 side, and the other end is Locked to the support leg 30 side.
The leg lock device 26 can be switched to a locked state that locks the rotation operation of the support leg 30. When the leg lock device 26 is in the retracted state, specifically, as shown in FIG. When the arm is detached from the leg holding member, the rotation of the support leg 30 is locked. Then, as shown in FIG. 8, when the locked support leg 30 is pulled, the locked state is released and the support leg 30 is returned to the leg holding member 50 so as to return to the seatable state by the biasing force of the spring member 26b. It can be moved to a position where it can be mounted.

As shown in FIG. 2, the support leg 30 is a substantially U-shaped pipe member that supports the seat cushion 2, and includes a leg main body portion 31 disposed on the left and right sides and a lower end portion of each leg main body portion 31. And a leg connecting portion 32 to be connected.
The upper end of the leg main body 31 is connected to the left and right inner surfaces of the cushion frame 20 and is connected to a substantially central portion in the front-rear direction. Is retained.
The lower end of the support leg 30 is arrange | positioned below the upper end of the lower rail 4a, as shown to the front view of FIG.

The support base 40 is a member that supports the seat back 1, and as shown in FIG. 3, left and right side base portions 41 disposed along the upper rail 4 b on the left and right sides, and front portions of the side base portions 41. A first base connecting portion 42 for connecting the side base portions 41, 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, and A holding member support portion 45 that connects the first base connecting portion 42 and the second base connecting portion 43 and supports the leg holding member 50.
The support base 40 is covered from above by a base cover 60 shown in FIG.

The side base portion 41 is made of a substantially crank-shaped sheet metal member that is long in the front-rear direction, and as shown in FIG. 3, a connecting wall portion 41a connected to the upper surface of the upper rail 4b, and left and right inner end portions of the connecting wall portion 41a. The inner wall portion 41b is bent downward from the inner wall portion 41b, and the outer wall portion 41c is bent upward from the left and right outer end portions of the connecting wall portion 41a.
Of the side base portion 41, flange portions 41d and 41e are formed at the lower end portion of the inner wall portion 41b and the upper end portion of the outer wall portion 41c, respectively, which are bent inwardly on the left and right sides.
Further, a notch portion 41f is formed in a portion of the left side base portion 41 facing the back rotation shaft 12 when viewed from the seat side surface side, and the back rotation shaft 12 is connected from the seat side surface side. The bracket 11, the reinforcing base portion 44, and the side base portion 41 are easily assembled.
The cutout portion 41f is cut out in a substantially semicircular shape from the upper surface of the side base portion 41 downward.

The size of the side base portion 41 is formed larger than the size of the reinforcement base portion 44 in the front-rear and left-right directions, and the front end portion and the rear end portion of the side base portion 41 are the front end portion and the rear end of the reinforcement base portion 44, respectively. Projects to the outside of the front and rear than the part.
Since the side base part 41 close to the vehicle body floor is larger than the reinforcing base part 44, the support rigidity of the support base 40 is improved, and the support rigidity of the seat body is improved.

As shown in FIG. 3, the first base connecting portion 42 and the second base connecting portion 43 are made of a substantially circular pipe member extending in the left-right direction, and are separated by a predetermined distance in the front-rear direction. These are arranged substantially parallel in the left-right direction.
Moreover, the 1st base connection part 42 and the 2nd base connection part 43 are arrange | positioned in the position which overlaps with the lower rail 4a and the upper rail 4b in an up-down direction, as shown in the front view of FIG.

As shown in FIG. 3, the reinforcing base portion 44 is made of a substantially crank-shaped sheet metal member that is elongated in the front-rear direction, and includes a connecting wall portion 44 a connected to the upper surface of the side base portion 41, and the left and right inner sides of the connecting wall portion 44 a. It is mainly composed of an inner wall 44b bent downward from the end and an outer wall 44c bent upward from the left and right outer ends of the connecting wall 44a.
Of the reinforcing base portion 44, a flange portion 44d bent to the left and right inner sides is formed at the lower end portion of the inner wall portion 44b, and a flange portion 44e bent to the left and right outer sides is formed at the upper end portion of the outer wall portion 44c. Is formed.

The left and right end portions of each of the first base connecting portion 42 and the second base connecting portion 43 are connected so as to be sandwiched between the side base portion 41 and the reinforcing base portion 44 as shown in FIG.
More specifically, the first base connecting portion 42 is connected so as to be surrounded by the inner wall portion 41 b and the flange portion 41 d of the side base portion 41 and the flange portion 44 d of the reinforcing base portion 44. . Further, the second base connecting portion 43 is surrounded by the inner wall portion 41 b and the flange portion 41 d of the side base portion 41 and the connecting wall portion 44 a and the inner wall portion 44 b of the reinforcing base portion 44. It is connected.
In other words, the side base portion 41 is connected to lower portions of the first base connecting portion 42 and the second base connecting portion 43, and the reinforcing base portion 44 is above the first base connecting portion 42 and the second base connecting portion 43. The side base part 41 and the reinforcement base part 44 are arranged at positions where they are not overlapped with each other.

A protruding portion 44 g that protrudes upward along the outer surface of the second base connecting portion 43 is formed in a portion of the reinforcing base portion 44 that contacts the second base connecting portion 43.
The protruding portion 44g is a portion that is long in the left-right direction, extends to the left and right outer ends of the reinforcing base portion 44 toward the left and right outer sides, and on the other hand, does not overlap the leg holding member 50 toward the left and right inner sides. It extends to.

As shown in FIG. 3, the reinforcing base portion 44 is attached to the side base portion 41 at the base attaching portion 44 f of the connecting wall portion 44 a, and includes a flange portion 44 e and a flange portion 41 e of the side base portion 41. Are overlapped in the vertical direction to form a closed cross-sectional structure, and the support rigidity of the support base 40 is improved.
In other words, the support base 40 has a middle shape. Therefore, the support rigidity of the support base 40 is improved.
In the reinforcing base portion 44, a convex portion (not shown) that projects upward is formed in a portion located between the plurality of base mounting portions 44f in the front-rear direction, and extends in the left-right direction. The mounting rigidity of 44f is improved.

The left reinforcing base portion 44 is sandwiched and connected between the connection bracket 11 and the side base portion 41 in the left-right direction.
As shown in the front view of FIG. 4, the reinforcing base portion 44 is disposed at a position overlapping the lower rail 4a and the upper rail 4b in the left-right direction.

As shown in FIG. 3, the holding member support portion 45 is a curved sheet metal member that supports the leg holding member 50. The holding member support portion 45 extends in the front-rear direction of the seat and has a substantially central portion below the front portion and the rear portion. A bent portion 45a is formed that is bent in a straight line.
A front portion of the holding member support portion 45 is attached to the first base connecting portion 42, and a rear portion of the holding member support portion 45 is attached to the second base connecting portion 43.
A leg holding member 50 is attached to the upper surface of the bent portion 45a.

The leg holding member 50 is a substantially U-shaped clip member that detachably holds the support leg 30, and as shown in FIG. 3, a connection that connects a pair of side wall parts 51 and the lower end part of each side wall part 51. And a wall portion 52.
Each side wall 51 is bent in a direction close to each other from the lower end to the upper end. In other words, the side wall 51 is bent in the opening inward direction so as to narrow the opening of the leg holding member 50. Is formed with a curled portion 53 that is bent in the outward direction of the opening.
The connecting wall portion 52 has a curved shape and is attached so as to be along the bent portion 45 a of the holding member support portion 45. More specifically, the connecting wall portion 52 includes a notch-raised portion (not shown) obtained by cutting and raising a part of the connecting wall portion 52, and the cut-and-raised portion is latched in an unillustrated latching groove formed in the bent portion 45a. It is attached with.

The leg holding member 50 is supported by the holding member support portion 45 at a position inclined backward with a predetermined inclination angle with respect to the horizontal plane. In other words, the leg holding member 50 is supported by the holding member support portion 45 at a position where the opening portion is directed obliquely upward and forward.
The leg holding member 50 is formed so that the width of the opening is slightly narrower than the width diameter of the support leg 30, and the leg holding member 50 is elastically deformed to hold the support leg 30 in a detachable manner.

An inertia lock device 54 that locks the support leg 30 while being held by the leg holding member 50 at the time of a rear collision of the vehicle is disposed at a portion adjacent to the leg holding member 50.
As shown in FIG. 3, the inertia lock device 54 is attached to the support base 40 and is disposed between the first base connecting portion 42 and the second base connecting portion 43 in the front-rear direction. Yes.
As shown in the perspective view of FIG. 2, the leg holding member 50 is disposed rearward of the front end portion of the upper rail 4b. Further, as shown in the front view of FIG. 4, the lower rail 4a or the upper rail 4b in the vertical direction. It is arranged at the position that overlaps.

The base cover 60 is a resin member that covers the entire support base 40 from above. As shown in FIG. 1, the base cover 60 includes a guide portion 61 that guides the rotation operation of the support legs 30 at the front portion.
The guide portion 61 has a concave shape that is recessed downward from the upper surface of the base cover 60, and is formed on an inclined portion 61a that is inclined downward from the front end portion thereof toward the rear, and a bottom surface portion that is continuous from the inclined portion 61a. And an opening 61b.
The leg holding member 50 is attached to the base cover 60 by the curled portion 53 being exposed to the outside through the opening 61 b and being hooked on the guide portion 61.
The support leg 30 is configured to be attached to the leg holding member 50 that is guided by the inclined portion 61a of the guide portion 61 and exposed from the opening 61b.

  Next, the operation of moving the vehicle seat S from the seatable state to the stored state will be described with reference to FIGS. 5 and 6, the reclining device 13, the cushion locking device 25, and the leg locking device 26 indicate a locked state when illustrated with black circles, and an unlocked state when illustrated with white circles. Shall be shown. The same applies to FIG. 7 and FIG.

When the vehicle seat S is in the seatable state shown in FIG. 5 (a), the seat back 1 is supported by the support base 40 and locked in the standing state by the reclining device 13, and the seat cushion 2 holds the legs. It becomes the structure supported by the support leg 30 hold | maintained at the member 50. FIG.
The leg rotation shaft 26a at the upper end of the support leg 30 is disposed in front of the seat with respect to the leg holding member 50 when in the seatable state.
Further, the front end portion of the seat cushion 2 is disposed in front of the first base connecting portion 42 when in the seatable state.

When the vehicle seat S is moved from the seatable state to the stowed state, for example, an operation lever (not shown) provided on the upper surface of the seat back 1 is operated.
When the occupant operates the operation lever, as shown in FIG. 5B, the locked state of the reclining device 13 is released, and the seat back 1 moves the seat cushion 2 to the storage floor by the urging force of the spiral spring 13b. Rotation is started toward the front side of the seat around the back rotation shaft 13a so as to be moved.
The support leg 30 starts to rotate toward the seat cushion 2 around the leg rotation shaft 26 a with respect to the seat cushion 2 in conjunction with the rotation of the seat back 1. At this time, since the support leg 30 is stretched 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 operation lever and the reclining device 13, and the cable is pulled by the operation of the operation lever to release the locked state.

As shown in FIG. 6A, when the seat back 1 reaches a predetermined rotational position, the support leg 30 is detached from the leg holding member 50. In other words, the support leg 30 is detached from the leg holding member 50 when the support leg 30 reaches a predetermined rotation position in conjunction with the rotation of the seat back 1.
At this time, the support leg 30 is locked by the leg lock device 26 in a state of being folded to the seat cushion 2 side.

Further, as shown in FIG. 6B, when the seat back 1 reaches a predetermined rotational position, the front end portion of the seat cushion 2 comes into contact with the storage floor surface before the support legs 30.
Sliding members (not shown) that are slidable with respect to the storage floor surface are attached to both front and rear ends of the seat cushion 2, and the seat cushion 2 faces the front side of the seat as the seat back 1 rotates. The storage floor surface can be slid stably.
The sliding member only needs to be attached to at least one of the front and rear end portions of the seat cushion 2.

By the above series of operations, as shown in FIG. 6C, the seat main body is stored on the storage floor, and the vehicle seat S is switched to the storage state.
The seat cushion 2 is locked by the cushion lock device 25 when in the retracted state, specifically when the seat back 1 is folded to the seat cushion 2 side.
The support leg 30 is disposed at a position lower than the leg holding member 50 in the stored state.

Next, the operation of moving the vehicle seat S 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. 7A, for example, the occupant manually raises the seat body to switch to the tip-up state shown in FIG. 7B.
At this time, since the cushion lock device 25 locks the rotational movement of the seat cushion 2, the seat cushion 2 can be raised integrally by raising the seat back 1 upward.
The support leg 30 is disposed behind the first base connecting portion 42 in the tip-up state.
In the tip-up state, a large cargo space can be secured on the front side of the seat by sliding the upper rail 4b to the rear side of the seat with respect to the lower rail 4a.

  When the vehicle seat S is switched to the tip-up state shown in FIG. 7B, the seat back 1 returns to the same position as the seatable state and is locked in the standing state by the reclining device 13. .

Next, the operation of moving the vehicle seat S from the tip-up state to the seatable state will be described based on FIG.
When the vehicle seat S is moved from the tip-up state to the stowed state, as shown in FIG. 8A, for example, the support leg 30 that functions as an operation lever is operated.
The cushion lock device 25 and the lock state of the leg lock device 26 are released by the passenger pulling the support leg 30 upward about the leg rotation shaft 26a, in other words, by pulling away from the cushion frame 20. The
A known cable (not shown) is connected between the support leg 30 and the cushion lock device 25, and the cable is pulled by an operation of the support leg 30 to release the locked state. .

As shown in FIG. 8B, the seat cushion 2 rotates downward with respect to the seat back 1 by the urging force of the spiral spring 25b as the cushion lock device 25 is released.
As the leg lock device 26 is released, the support leg 30 rotates about the leg rotation shaft 26a to a position where it can be attached to the leg holding member 50 by the urging force of the spring member 26b, and is attached to the leg holding member 50. Will be.
By the series of operations, the vehicle seat S returns to the seatable state shown in FIG.

In the above embodiment, the support base 40 of the vehicle seat S is configured to rotatably support the seat back 1 via the connection bracket 11 as shown in FIG. 2, but is not limited thereto. Alternatively, the connecting bracket 11 may be omitted, and the seat back 1 may be directly attached to the support base 40 so as to be rotatable.
In the above embodiment, the support base 40 and the connection bracket 11 are different from each other. However, the support base 40 may include the connection bracket 11.

In the above embodiment, as shown in FIG. 3, the support base 40 includes a base attachment portion 44f for attaching the side base portion 41 and the reinforcing base portion 44, and the base attachment portion 44f is attached by a fastening bolt. However, it is not limited to this, and may be attached by a known method such as welding or adhesive.
Further, a convex portion (not shown) extending upward is formed in a portion located between the plurality of base attaching portions 44f so as to extend in the left-right direction, but is not limited to this shape and arrangement. It may overhang or may be formed extending in the front-rear direction.

  In the above embodiment, the portion of the reinforcing base portion 44 that comes into contact with the second base connecting portion 43 is formed with a protruding portion 44g that protrudes upward along the outer surface of the second base connecting portion 43. However, without being limited thereto, the shape and arrangement can be appropriately changed as long as they are formed along the outer surface of the second base connecting portion 43.

In the above embodiment, as shown in FIG. 5, the leg holding member 50 is disposed behind the seat in the vehicle body floor with respect to the stepped portion connected to the storage floor.
By comprising in this way, the support leg 30 hold | maintained at the leg holding member 50 can be arrange | positioned compactly. Further, the support leg 30 supports the substantially central portion of the seat cushion 2 in the front-rear direction, and the support rigidity of the seat cushion 2 can be increased.
The vehicle body floor includes a step portion and does not include a storage floor.

  In the above embodiment, as shown in FIG. 6C, the cushion lock device 25 can be switched to a locked state that locks the rotational movement of the seat cushion 2 in the retracted state, but is not limited thereto. Instead, it may be configured to switch to the locked state in the chip-up state shown in FIG.

  In the above-described embodiment, a stowable vehicle seat used for an automobile has been described as a specific example. However, the seat is not limited to this, and a vehicle seat such as a train or a bus, or a vehicle seat such as an airplane or a ship. 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.
In particular, the shape, arrangement, and configuration of the support leg 30, the support base 40, and the leg holding member 50 described in the above embodiment are merely examples, and do not limit the present invention.

S Vehicle seat 1 Seat back 1a, 2a, 3a Cushion pad 1b, 2b, 3b Skin 2 Seat cushion 3 Headrest 4 Rail device 4a Lower rail 4b Upper rail 4c Lower rail fixing part 10 Back frame 11 Connecting bracket 11a Outer bracket part 11b Inner bracket part 12 Back rotation shaft 13 Reclining device 13a Back rotation shaft 13b Spiral spring 20 Cushion frame 21 Side frame 22 Front connection pipe 23 Center connection pipe 24 Pan frame 25 Cushion lock device 25a Cushion rotation shaft 25b Spiral spring 26 Leg lock device 26a Leg rotation shaft 26b Spring member 30 Support leg 31 Leg main body part 32 Leg connection part 40 Support base 41 Side base part 41a Connection wall part 41b Inner wall part 41c Outer wall part 41d, 41e Flange portion 41f Notch portion 42 First base connecting portion 43 Second base connecting portion 44 Reinforcing base portion 44a Connecting wall portion 44b Inner side wall portion 44c Outer side wall portion 44d, 44e Flange portion 44f Base attaching portion 44g Protruding portion 45 Holding member support part 45a Bending part 50 Leg holding member 51 Side wall part 52 Connecting wall part 53 Curled part 54 Inertial locking device 60 Base cover 61 Guide part 61a Inclined part 61b Opening part

Claims (14)

A vehicle seat capable of storing a seat back and a seat cushion connected to the seat back,
A support base provided on a vehicle body floor, to which a lower end side of the seat back is coupled;
A support leg having an upper end attached to the seat cushion and a lower end connected to the support base;
A leg holding member that is attached to the support base and detachably holds the lower end side of the support leg, and when the vehicle seat moves so as to be stored and the seat back reaches a predetermined position. And a leg holding member for detaching the support leg ,
One end side of the seat back is attached to the lower end side of the seat back, and the other end side is connected to the support base via a connection bracket that is rotatably connected to the support base. Vehicle seat. The support base includes left and right side base portions to which the left and right connection brackets disposed on the side of the seat are respectively attached, a first base connection portion that connects the left and right side base portions, and the first base connection portion. A second base coupling portion that couples the left and right side base portions at a position rearward than,
The vehicle seat according to claim 1, wherein the leg holding member is disposed between the first base connecting portion and the second base connecting portion in the seat front-rear direction.   The vehicle seat according to claim 2, wherein the first base connecting portion and the second base connecting portion extend in the seat width direction and are arranged substantially parallel to each other.   The support base includes a holding member support portion that extends in the front-rear direction of the seat to connect the first base connecting portion and the second base connecting portion and to which the leg holding member is attached. The vehicle seat according to 2 or 3. The support base includes a reinforcing base portion attached above the side base portion,
The vehicle seat according to any one of claims 2 to 4, wherein the side base portion and the reinforcing base portion form a closed cross-sectional structure. The support base includes a plurality of base attaching portions for attaching the side base portion and the reinforcing base portion,
The vehicular seat according to claim 5, wherein a convex portion projecting in a vertical direction is formed in a portion of the reinforcing base portion located between the plurality of base attaching portions. The left and right reinforcing base portions sandwich the first base connecting portion and the second base connecting portion with the side base portions,
Of the reinforcing base portion, a portion that comes into contact with the second base connecting portion is formed with a protruding portion that protrudes vertically along the outer surface of the second base connecting portion,
The vehicle seat according to claim 5 or 6, wherein the protrusion extends to an outer end in the seat width direction. The side base portion is connected to a lower portion of the first base connecting portion,
The vehicle seat according to any one of claims 5 to 7, wherein the reinforcing base portion is connected to an upper portion of the first base connecting portion. The vehicle seat according to claim 7, wherein the projecting portion of the reinforcing base portion extends to a position that does not overlap the leg holding member in the seat width direction. A back rotation shaft that is a rotation shaft of the seat back is attached to the support base,
The back rotation shaft is provided on the lower end portion side of the seat back, and is pivotally supported by the reinforcing base portion in the seat width direction.
The side base portion is disposed outside the reinforcing base portion in the seat width direction,
10. The vehicle seat according to claim 5, wherein a notch portion is formed in a portion of the side base portion that faces the back rotation shaft.   The vehicle seat according to claim 10, wherein the leg holding member is disposed in front of the seat with respect to the back rotation shaft. The seat back and the seat cushion connected to the seat back in a pivotable manner can be moved to a tip-up state in which the seat cushion is flipped upward,
The vehicle seat according to any one of claims 2 to 11, wherein the support leg is disposed rearward of the first base connecting portion in the tip-up state.   13. The seat cushion front end portion is disposed in front of the seat with respect to the first base connecting portion when the occupant is in a seatable state. 13. Vehicle seats. The vehicle seat according to any one of claims 1 to 13, wherein the connection bracket has a closed cross-sectional structure.

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