JP6347688B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat, and more particularly to a vehicle seat that can be switched between a use position where an occupant can be seated and a storage position.

  Conventionally, there are already known vehicle seats in which the seat cushion and the seat back constituting the seat body can be switched between the use position and the storage position, and among them, the seat body is folded in the upward state in a folded state. There is a vehicle seat that can be rotated and stored (see, for example, Patent Document 1).

The vehicle seat described in Patent Document 1 is a seat provided with a tumble mechanism that can fold up and store a folded seat body when the seat body is folded when not in use.
Specifically, the vehicle seat includes a tumble mechanism fixed to one end portion in the seat width direction and a leg member attached to the other end portion.
The tumble mechanism hinges the seat body to the vehicle floor and urges the seat body up by a torsion spring in the rotational direction.
The leg member is pivotally attached to the seat body at the upper end, and is detachably connected to the striker on the vehicle body floor. The leg member is housed on the seat body side where it can be connected to the striker. It can be rotated between the storage positions. And it is urged | biased by the torsion spring in an upper end part in the rotation direction by the side of a deployment position.
Further, a wire serving as a pulling member is connected between the tumble mechanism and the leg member, and the leg member resists the urging force of the torsion spring according to the amount of rotational displacement of the seat body, and moves toward the storage position side. It is configured to be forcibly displaced in the rotational direction. Therefore, when the seat body is flipped up and stored, the leg member is also a seat that can be automatically stored on the seat body side.

Japanese Patent No. 4697024

By the way, in a sheet that can be flipped up and stored as in Patent Document 1, a wire is provided between the tumble mechanism and the leg member so that the leg member can be stored on the sheet main body side at the same time that the sheet main body is flipped up and rotated. Was connected as a traction member.
Although the wire can save space compared to the link structure, for example, a winding structure is required, or when the wire becomes relatively thin, the winding force becomes weaker, and friction increases and sliding occurs. There was a possibility that the property would deteriorate.
In particular, when changing the extending direction of the wire in order to ensure the degree of freedom of arrangement, a guide member made of resin or the like is required separately, and depending on the shape of the guide member, the slidability of the wire may be disturbed or position There was a risk that the displacement would occur.
Therefore, there has been a demand for a flip-up sheet with improved storage operability while saving space and ensuring the degree of freedom of arrangement.

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 having improved storage operability while ensuring space saving and freedom of arrangement. is there.
In particular, an object of the present invention is to provide a vehicle seat that is capable of automatically retracting and rotating a leg body at the same time that the leg member is automatically stored on the seat body side, and having improved storage operability.

The object is achieved, according to the vehicle seat of the present invention, a seat cushion as a seating portion, a switchable vehicle seat between the occupant and possible uses position seating and stowed position, the vehicle body front A a support base fixed to, mounted on the support base, a seat pivot axis, wherein the seat cushion is connected to one end of the seat front-rear direction or the sheet width direction of the seat cushion so as to be rotatable , upper end pivotally attached to the other end of said seat cushion, removable of engaged portions provided at the lower portion is removably connected to the floor engaging portion fixed to the vehicle body front a A leg, a leg urging member that is attached to the detachable leg and urges the detachable leg to a position connectable to the floor engaging portion, one end is fixed to the periphery of the support base, and the other end is the Attached to the detachable leg A belt-like member that pulls the detachable leg to rotate toward the seat cushion against the urging force of the leg urging member as the seat cushion rotates from the use position to the storage position. And the one end of the belt-like member is provided below the other end of the belt-like member .

As described above, one end is fixed to the periphery of the support base, the other end is attached to the attachment / detachment leg, and the attachment / detachment leg is attached to the leg urging member as the seat cushion is rotated from the use position to the storage position. Since the belt-shaped member that is pulled to rotate and move toward the seat cushion against the force is provided, the seat cushion can be stored and rotated, and at the same time, the detachable leg can be automatically stored on the seat cushion side.
In addition, since a belt-like member is used as a pulling member, space can be saved as compared with a conventional link structure, and a winding structure is not necessarily required compared with a conventional wire, and a pulling force is not required. It can be ensured, and good slidability is ensured by contact with other components. Furthermore, even when the extending direction of the belt-like member is changed in order to ensure the degree of freedom in arrangement, the guide member is not necessarily required, so that space can be saved.
Accordingly, the vehicle seat has improved storage operability while saving space and securing the degree of freedom of arrangement.

At this time, the a retracted position, a position obtained by accommodating rotation of said seat cushion upwardly from the use position, a lower position than the shaft the seat once the one end in the support base around the belt-shaped member The other end of the belt-like member is attached to a position below the upper end of the detachable leg, and the detachable leg is housed and rotated toward the seat cushion as the seat cushion rotates. Good tow.
With the above configuration, the detachable leg is forcibly displaced in the rotational direction on the seat cushion side against the urging force of the urging member in accordance with the rotational displacement amount of the seat cushion that is flipped up.
In other words, the traction force of the belt-shaped member with respect to the attachment / detachment leg increases in accordance with the rotational displacement amount of the seat cushion that is flipped up. Therefore, the seat cushion can be flipped up and stored, and at the same time, the detachable leg can be automatically stored.

At this time, a cushion frame serving as a skeleton of the seat cushion is provided, and the belt-like member is supported between the support base and the detachable leg so that the surface thereof overlaps at least a part of the bottom surface of the cushion frame. Good to be.
As described above, since the belt-like member is supported on the surface by using the cushion frame that is an existing part, the extending direction of the belt-like member can be stabilized and positional deviation and play can be suppressed.

At this time, the cushion frame includes a frame main body and a plate-like lower frame attached to the bottom surface of the frame main body, and the band-shaped member extends so that the surface overlaps the bottom surface of the lower frame. good.
As described above, the belt-like member can be more favorably supported on the surface by using the plate-like lower frame serving as an existing part. In particular, the load on the strip member can be dispersed.

At this time, it is preferable that a sliding member for sliding the belt-like member is provided at a portion where the belt-like member abuts in the cushion frame.
With the above configuration, the sliding resistance of the belt-shaped member can be suppressed at the contact portion with the cushion frame. Specifically, as the sliding member, it is conceivable to provide a resin coating on the cushion frame or to attach a felt or a nonwoven fabric.

At this time, the belt-shaped member extends from one end fixed to the periphery of the support base so that the surface thereof overlaps the bottom surface of the cushion frame, and is twisted between the overlapping portion with the cushion frame and the detachable leg. The other end is preferably attached so that the surface overlaps the side surface of the detachable leg.
By the said structure, the other end part of a strip | belt-shaped member becomes easy to attach to an attachment / detachment leg. Moreover, since the other end part of a strip | belt-shaped member extends so that the rotation range of an attachment / detachment leg may be avoided and it is attached to the side surface of an attachment / detachment leg, the extension direction of a strip | belt-shaped member can be stabilized and position shift can be suppressed.

According to another aspect of the present invention, there is provided a vehicle seat that includes a seat cushion serving as a seating portion and is switchable between a use position where a passenger can be seated and a storage position. A support base fixed to the floor, and a seat rotation shaft attached to the support base and connected to one end side of the seat cushion in the seat front-rear direction or the seat width direction so that the seat cushion is rotatable. An attachment / detachment leg whose upper end is rotatably attached to the other end of the seat cushion, and an engaged portion provided at the lower end is detachably connected to a floor engagement portion fixed to the vehicle body floor. A leg urging member that is attached to the detachable leg and urges the detachable leg to a position where the detachable leg can be connected to the floor engaging portion; one end is fixed to the periphery of the support base; and the other end is the detachable Take on leg As the seat cushion is rotated from the use position to the stowed position, the detachable leg is pulled to rotate toward the seat cushion against the urging force of the leg urging member. A belt-like member, a cushion frame serving as a skeleton of the seat cushion, and an attachment member attached to the other end of the belt-like member, the belt-like member between the support base and the detachable leg, This is solved by being supported so that the surface overlaps at least a part of the bottom surface of the cushion frame, and the other end of the belt-like member is attached to the detachable leg so as to be rotatable.
With the above configuration, when the belt-like member is pulled so as to rotate and retract the attachment / detachment leg toward the seat cushion as the seat cushion is flipped up, the other end of the belt-like member flexibly responds to the rotation of the attachment / detachment leg. Since it rotates, it can suppress that an extra twist generate | occur | produces in a strip | belt-shaped member.
At this time, the attachment member is a substantially triangular plate, and the plate may have a narrower width on the side closer to the attachment / detachment leg than on the side closer to the belt-like member.

At this time, the cushion frame is provided with a guide member that guides the extending direction of the belt-shaped member between the overlapping portion with the belt-shaped member and the attachment / detachment leg, and the guide member is formed of the belt-shaped member. It is preferable that the belt-shaped member is disposed at a position higher than the other end portion, and is supported so that the surface thereof overlaps the upper surface of the guide member.
As described above, since the guide member is provided, the extending direction of the belt-like member can be further stabilized and the positional deviation can be further suppressed.
In addition, the guide member is arranged at a position higher than the other end of the belt-like member, and the belt-like member is supported so that the surface overlaps the upper surface of the guide member, so the belt-like member is compactly arranged on the seat cushion side. Thus, a space can be secured at a position below the seat cushion.

At this time, a leg rotation shaft is provided at an upper end portion of the attachment / detachment leg so that the attachment / detachment leg can rotate with respect to the seat cushion, and among the leg rotation shaft and the guide member, It is good to arrange | position so that the part which the said strip | belt-shaped member contacts may extend in the same direction.
By the said structure, it can suppress further that a twist generate | occur | produces in a strip | belt-shaped member with a guide member.

At this time, the attachment / detachment leg includes left and right side wall portions arranged at intervals in the seat width direction, and a connection shaft portion that connects the left and right side wall portions, and the attachment member is attached to the connection shaft portion. It is good to be attached so that rotation is possible.
With the above configuration, since the other end portion of the belt-like member is attached to the connecting shaft portion having relatively improved rigidity among the attachment / detachment legs, the attachment rigidity of the belt-like member is improved.
A seat back provided so as to be tiltable with respect to the seat cushion; and a lock mechanism for locking the detachable leg to the floor, the lock mechanism being released by an overturning operation of the seat back, The detachable leg may be housed in the seat cushion by the pulling force of the belt-like member when it is flipped up and rotated to the storage position.
The other end portion of the belt-shaped member is disposed below a lower end of an end portion of the seat cushion on the side where the attachment / detachment leg is provided, and the support base is included in the seat cushion. It is good to arrange | position above the lower end of the edge part by which it is made.

According to the present invention, the seat cushion can be stored and rotated, and at the same time, the detachable leg can be automatically stored on the seat cushion side.
In addition, since a strip-shaped member is used as a traction member, space can be saved compared to the conventional link structure, and a winding structure is not necessarily required compared to the conventional wire, and traction force can be secured. Good slidability is also ensured by contact with these components. Furthermore, even when the extending direction of the belt-like member is changed in order to ensure the degree of freedom of arrangement, the guide member is not necessarily required, and thus space saving can be achieved.
Accordingly, the storage operability can be improved while saving space and ensuring the degree of freedom of arrangement.

According to the present invention, the detachable leg is forcibly displaced in the rotational direction on the seat cushion side against the urging force of the urging member in accordance with the rotational displacement amount of the seat cushion that is flipped up.
In other words, the traction force of the belt-shaped member with respect to the attachment / detachment leg increases in accordance with the rotational displacement amount of the seat cushion that is flipped up. Therefore, the seat cushion can be flipped up and stored, and at the same time, the detachable leg can be automatically stored.
According to the present invention, since the belt-like member is supported on the surface using the existing frame, the extending direction of the belt-like member can be stabilized and positional deviation and play can be suppressed.
According to the present invention, the sliding resistance of the belt-shaped member can be suppressed by the sliding member.

According to the present invention, the other end portion of the belt-shaped member can be easily attached to the detachable leg, the extending direction of the belt-shaped member can be stably suppressed, and positional deviation can be suppressed, and the occurrence of extra twist can be suppressed.
According to the present invention, the guide member can further stabilize the extension direction of the belt-like member and further suppress the positional deviation. Moreover, it can suppress further that twist generate | occur | produces in a strip | belt-shaped member.
According to the present invention, the attachment rigidity of the belt-like member is improved.

It is a side view of the vehicle seat which concerns on this embodiment. It is a figure explaining the use position of the vehicle seat. It is a figure explaining the operation | movement which moves to the storage position from the use position of a vehicle seat. It is a figure explaining the operation | movement which moves to the accommodation position of a vehicle seat. It is a figure explaining the operation | movement which moves to the accommodation position of a vehicle seat. It is a figure explaining the storage position of the vehicle seat.

The present embodiment is a vehicle seat that can rotate by flipping up a seat body, and is mounted on a support base, and a seat pivot shaft to which the seat body is pivotably connected, and an upper end portion is attached to a seat cushion. A detachable leg whose lower end is detachably connected to the floor engaging portion, a urging member that urges the detachable leg to a position engageable with the floor engaging portion, and one end portion fixed to the periphery of the support base. A belt-like member to which the other end is attached to the attachment / detachment leg and pulls the attachment / detachment leg to be retracted and rotated to the seat cushion side against the urging force of the leg urging member as the seat cushion is flipped up and rotated, The present invention relates to an invention of a vehicle seat.
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 between a seat body including a seat back 1, a seat cushion 2, and a headrest 3, and between the seat body and the vehicle body floor, and the seat body can be rotated. A support base 30 connected to the seat base, an attachment / detachment leg 40 for supporting the seat body from below, and one end fixed to the periphery of the support base 30 and the other end attached to the attachment / detachment leg 40. Along with this, the belt-like member 50 that pulls the detachable leg 40 so as to be housed and rotated toward the seat cushion 2 side is mainly constituted.
The vehicle seat S includes a reclining device 12 that rotatably connects the seat back 1 to the seat cushion 2, and a leg rotation shaft 25 that rotatably connects the detachable leg 40 to the seat cushion 2. And a sheet rotation shaft 33 that rotatably connects the sheet main body to the support base 30.

The vehicle seat S is a seat that can be arranged between a use position where an occupant can be seated and a storage position in which the seat body is flipped up and rotated backward.
Specifically, in the vehicle seat S, when the occupant pulls the operation strap 4 from the use position shown in FIG. 2, the seat back 1 is folded to the seat cushion 2 side (FIG. 4). When the seat main body is flipped up and rotated backward with the seat back 1 folded, the seat back 1 is switched to the storage position shown in FIG. Further, when the occupant manually rotates the seat cushion 2 downward from the storage position, the seat cushion 2 returns to the use position shown in FIG. Details will be described later.

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

The back frame 10 is formed of a substantially rectangular frame that serves as a skeleton of the seat back 1, and is connected to the cushion frame 20 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 a cushion. Attached to the frame 20.
A reclining device 12 that rotatably connects the back frame 10 to the cushion frame 20 is attached to the upper end of the connection bracket 11.

The reclining device 12 is a known device and, as shown in FIG. 1, a back rotating shaft 13 and a spiral that rotates the back frame 10 forward about the back rotating shaft 13 and biases it to the folding position. The spring 14 is mainly composed of.
The back rotation shaft 13 is pivotally supported by the back frame 10 and the connection bracket 11 in the left-right direction. One end of the spiral spring 14 is hooked on the back frame 10 side, and the other end is the support base 30. It is hung on the side.
The reclining device 12 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, releases the locked state by operating the operation strap 4, The back frame 10 can be rotated forward by the urging force of the spring 14 and folded to the cushion frame 20 side.

  The cushion frame 20 is formed of a substantially rectangular frame that is a skeleton of the seat cushion 2, and covers a frame main body 21 that is a rectangular frame-shaped pipe member and the entire bottom surface of the frame main body 21, as shown in FIG. The plate-like lower frame 22 attached in this manner and the plate-like upper frame 23 (pan frame) attached so as to cover the upper surface of the front portion of the frame main body 21 are mainly configured.

An opening 22a having a size about the size of the detachable leg 40 is formed in a slightly forward portion of the central portion of the lower frame 22 in the left-right direction of the seat.
A leg rotation shaft 25 and a leg urging spring 26 are attached to the inner side surface of the frame main body 21 in the left-right direction of the seat via a mounting bracket 24.
More specifically, the leg rotation shaft 25 and the leg urging spring 26 are disposed inside the frame body 21 and in the opening 22 a of the lower frame 22, and the detachable leg 40 is interposed via the leg rotation shaft 25. Is provided so as to protrude downward from the cushion frame 20 (opening 22a).

The leg rotation shaft 25 is pivotally supported by the mounting bracket 24 and the detachable leg 40 in the left-right direction. The leg urging spring 26 is disposed around the leg rotation shaft 25 and one end thereof is the cushion frame 20. The other end is hooked to the detachable leg 40 side.
The leg urging spring 26 urges the detachable leg 40 in the direction opposite to the cushion frame 20 with the leg rotation shaft 25 as the center, in other words, in a direction away from the cushion frame 20.
More specifically, the leg urging spring 26 urges the detachable leg 40 to a position where it can be connected to an engagement striker described later fixed on the vehicle body floor.

As shown in FIG. 1, the support base 30 is a support member that rotatably connects the seat body to the vehicle body floor.
The support base 30 includes a fixed bracket 31 fixed on the vehicle body floor, a movable bracket 32 integrally connected to the rear end portion of the cushion frame 20, and a seat pivotally supported by the fixed bracket 31 and the movable bracket 32. A rotation shaft 33, a spiral spring 34 attached around the seat rotation shaft 33, and a pivot that is pivotally supported at a front position and a lower position than the seat rotation shaft 33 so that one end portion of the belt-like member 50 can be fixed. The shaft 35 is mainly composed of.
One end of the spiral spring 34 is latched on the movable bracket 32 side, and the other end is latched on the fixed bracket 31 side.

In the above configuration, the support base 30 supports the seat body so as to be rotatable between the use position shown in FIG. 2 and the storage position shown in FIG.
The spiral spring 34 biases the seat body (seat cushion 2) in a direction in which the seat body (seat cushion 2) is flipped up and rotated around the seat rotation shaft 33, in other words, in a direction toward the storage position.

As shown in FIG. 1, the detachable leg 40 is a member that is formed of a sheet metal member having a substantially U-shaped cross section that is long in the vertical direction, and supports the sheet body.
The detachable leg 40 has an upper end rotatably attached to the front end of the cushion frame 20 via the leg rotation shaft 25, and an engagement hook 41 provided on the lower end is fixed on the vehicle body floor. The engaging hook 41 corresponds to the engaged portion of the detachable leg and the engaging striker 42 corresponds to the floor engaging portion in the claims.

The detachable leg 40 is configured to be rotatable between a use position around the leg rotation shaft 25 and a storage position rotated and stored on the seat cushion 2 side.
The detachable leg 40 is in a standing posture when in the use position shown in FIG. 2 and is engaged with the engagement striker 42. When the detachable leg 40 is in the storage position shown in FIG. It is arranged so that it does not overhang.
The detachable leg 40 is always urged toward the use position by the urging force of the spiral spring 34.

The detachable legs 40 include left and right side wall portions 40a arranged at intervals in the left and right direction, a front wall portion (not shown) that connects the front end portions of the left and right side wall portions 40a, and the front and rear direction of the left and right side wall portions 40a. It is mainly comprised from the connection shaft part 40b which connects a center part.
The connecting shaft portion 40b is disposed below the leg rotating shaft 25, and the other end portion 52 of the belt-like member 50 is rotatably attached to the connecting shaft portion 40b.

Note that a known lock device 43 is attached to the lower end portion of the attachment / detachment leg 40 to move the engagement hook 41 in the left-right direction to engage and lock the engagement striker 42.
The locking device 43 is connected to a switching device (not shown) via a cable member (not shown). The locking device 43 is capable of locking the engagement hook 41 to the engagement striker 42 by the switching device, and cannot be locked. It can be switched to a state.

The belt-like member 50 is a belt-like strap made of nylon resin. As shown in FIG. 1, one end portion 51 is fixed to the fixed shaft 35 of the support base 30, and the other end portion 52 is interposed via a mounting plate 53. It is attached to the detachable leg 40 so as to be rotatable.
Specifically, the surface of the belt-like member 50 first overlaps from the one end 51 fixed to the fixed shaft 35 to the bottom surface of the lower frame 22 and the upper surfaces of the guide members 54 and 55 attached to the lower frame 22. It abuts and extends forward of the seat while being sandwiched between the lower frame 22 and the guide members 54 and 55.
The belt-like member 50 is bent with the guide member 55 as a fulcrum, and continuously extends in front of the seat while being inclined upward.

The belt-shaped member 50 is in contact with the bottom surface of the upper frame 23 and the upper surfaces of the guide members 56 and 57 attached to the upper frame 23 so as to be sandwiched between the upper frame 23 and the guide members 56 and 57. It extends continuously in front of the seat.
The belt-like member 50 continuously extends in front of the seat while being inclined downward with the guide member 57 as a fulcrum, and is twisted approximately 90 degrees between the guide member 57 and the attachment / detachment leg 40.
The band-like member 50 continuously extends in a state where the other end side is twisted, and the other end portion 52 is attached to the outer surface of the side wall portion 40a of the attachment / detachment leg 40 so as to overlap the surface.

  The attachment plate 53 is made of a substantially triangular metal plate, and the other end 52 of the belt-like member 50 is sewn into an opening hole provided in the attachment plate 53.

The guide members 54, 55, 56, and 57 are substantially U-shaped guide wires, and are members that guide the extending direction of the belt-shaped member 50.
The guide member 54 is attached so as to project downward from the bottom surface of the lower frame 22, and the guide member 55 is attached so as to project forward from the front surface of the lower frame 22 at the opening 22a.
The guide members 56 and 57 are attached so as to protrude downward from the bottom surface of the upper frame 23 in the frame of the frame main body 21 and in the opening 22a.

As shown in FIG. 1, the guide members 54 to 57 are arranged so that the guide portion with which the belt-like member 50 abuts extends in the left-right direction. Moreover, it arrange | positions so that the strip | belt-shaped member 50 may be pinched | interposed in the left-right width direction.
The guide members 54 and 55 are disposed at a position below the other end 52 of the detachable leg 40 to which the belt-like member 50 is attached.
The guide members 56 and 57 are disposed below the leg rotation shaft 25 in the detachable leg 40 and are disposed above the other end 52 to which the belt-like member 50 is attached.

A sliding member (not shown) for sliding the belt-like member 50 is provided on the bottom surface of the lower frame 22 and the upper frame 23 where the belt-like member 50 comes into contact.
The sliding member is preferably, for example, a resin coating provided on the frame, a felt or a non-woven fabric attached on the frame.

In the above configuration, the one end 51 is fixed to the fixed shaft 35 on the support base 30 at a position in front of and below the seat rotation shaft 33, and the other end 52 is a leg rotation on the detachable leg 40. It is attached at a position below the moving shaft 25.
Therefore, the belt-shaped member 50 is configured to retract and rotate the attachment / detachment leg 40 toward the seat cushion 2 against the urging force of the leg urging spring 26 as the seat cushion 2 is swung up from the use position to the storage position. Can be towed to.
Specifically, as shown in FIGS. 2 to 6, the pulling force of the belt-shaped member 50 on the attachment / detachment leg 40 is increased in accordance with the rotational displacement amount of the seat cushion 2 that is flipped up. The detachable leg 40 is configured to be forcibly displaced in the rotational direction on the seat cushion 2 side against the urging force of the leg urging spring 26.
As a result, the seat cushion 2 is flipped up and stored, and at the same time, the detachable leg 40 can be automatically stored.

<Sheet storage operation>
Next, an operation of flipping and rotating the seat body from the use position to the storage position will be described with reference to FIGS.
When the vehicle seat S is in the use position shown in FIG. 2, the seat back 1 is supported by the seat cushion 2 and locked in an upright state by the reclining device 12, and the seat cushion 2 includes the support base 30 and the detachable legs. 40 is supported from below.

When the vehicle seat S is moved from the use position to the storage position, for example, the operation strap 4 provided on the upper surface of the seat back 1 is operated.
When the occupant operates the operation strap 4, the reclining device 12 is unlocked as shown in FIG. 3, and the seat back 1 is seat cushioned around the back pivot shaft 13 by the urging force of the spiral spring 14. Start forward rotation to the 2 side.
Note that a known cable (not shown) is connected between the operation strap 4 and the reclining device 12, and the cable is pulled by the operation of the operation strap 4 to release the locked state.

When the seat back 1 is folded to the rotational position shown in FIG. 4, the lock device 43 releases the lock between the engagement hook 41 of the attachment / detachment leg 40 and the engagement striker 42. Then, the seat body (seat back 1) starts to flip up around the seat rotation shaft 33.
At this time, since the spiral spring 34 urges the sheet main body upward, the sheet main body rotates and moves so as to spring up as the lock device 43 is unlocked.
The switching device (not shown) and the locking device 43 are connected by a known cable, and when the seat back 1 is folded to the rotational position shown in FIG. 4, one end of the cable is pulled by the switching device, and the cable The lock device 43 connected to the other end of the lock is unlocked.

As shown in FIG. 5, when the seat body starts to flip up and rotate toward the storage position due to the urging force of the spiral spring 34, the belt-like member 50 causes the detachable leg 40 to move the leg urging spring in conjunction with the rotation of the seat body. It starts to be pulled so as to rotate and retract to the seat cushion 2 against the urging force of 26.
At this time, since the attachment plate 53 at the other end 52 of the belt-like member 50 rotates flexibly corresponding to the rotation of the attachment / detachment leg 40, it is possible to suppress the twisting of the belt-like member 50 from occurring.
When the seat body is flipped up and rotated to the storage position as shown in FIG. 6, the detachable leg 40 is stored without being exposed inside the seat cushion 2 by the traction force of the belt-like member 50.
By the series of operations described above, the vehicle seat S is switched from the use position to the storage position.

<Seat return operation>
On the other hand, when returning the vehicle seat S from the storage position to the use position, the occupant manually rotates the seat cushion 2 so as to lower it.
In conjunction with the lowering rotation of the seat cushion 2, the pulling force of the belt-like member 50 is weakened, and the detachable leg 40 is rotated from the inside of the seat cushion 2 toward the standing position by the urging force of the leg urging spring 26. Then, the detachable leg 40 is engaged and locked with the engagement striker 42.

Then, when the occupant manually lifts the seat back 1 in the folded state, the seat back 1 moves to the standing position and is locked by the reclining device 12.
By the series of operations, the vehicle seat S returns from the storage position to the use position.

In the above configuration, the guide members 56 and 57 are attached to a position above the leg rotation shaft 25 (position on the seat back 1 side) when viewed with the seat cushion 2 as a reference.
Therefore, as shown in FIG. 6, when the detachable leg 40 is accommodated in the seat cushion 2, it is possible to suppress the detachable leg 40 and the guide members 56 and 57 from interfering with each other.

In the above configuration, the leg rotation shaft 25 is mounted inside the seat cushion 2 via the mounting bracket 24 fixed to the left and right inner surfaces of the frame body 21.
At this time, the mounting bracket 24 is formed with a relief portion (not shown) for extending the band-shaped member 50, so that interference between the mounting bracket 24 and the band-shaped member 50 can be suppressed.

<Other embodiments>
In the above embodiment, the vehicle seat S is configured as a seat that can be stowed up and stored behind the seat, but is not limited thereto, and may be a seat that can be stowed up and stored in the front of the seat. Of course, a sheet that can be flipped up and stored in one of the left and right sides of the sheet may be used.

Moreover, in the said embodiment, although the seat S for vehicles assumes the storage position rotated up about 90 degree | times from the use position, it is not limited to this, About 180 degree | times from a use position and a use position You may comprise as a sheet | seat switchable between the storage positions flipped up and rotated.
In the case of the above configuration, by attaching a separate expansion / contraction member to the belt-like member 50, the load can be reduced even when a predetermined load or more is applied to the belt-like member 50 with the approximately 180-degree flip-up rotation.
As the elastic member, it is desirable to use a known elastic member such as rubber or a spring.

In the above embodiment, a leg urging spring 26 is attached around the leg rotation shaft 25 as a leg urging member. However, the urging member is not limited to this, and a known urging member such as a coil spring is used. It is possible to adopt as appropriate.
The same applies to the spiral spring 34 attached around the sheet rotation shaft 33.

  Moreover, in the said embodiment, although the one end part 51 of the strip | belt-shaped member 50 is being fixed on the support base 30, it is not limited to this, For example, you may be fixed to the vehicle body floor around the support base 30.

In the above embodiment, the fixed shaft 35 that fixes the one end 51 of the belt-like member 50 is pivotally supported on the support base 30 at a position forward and lower than the seat rotation shaft 33, but is not limited thereto. It can be changed without any change.
For example, the fixed shaft 35 may be pivotally supported at a front position or a lower position than the seat rotation shaft 33, and the belt-like member 50 can pull the detachable leg 40 as the seat body is flipped up.

Moreover, in the said embodiment, although the extending direction of the strip | belt-shaped member 50 is guided by the guide members 54-57, and it bends suitably, it is arrange | positioned so that it may extend substantially linearly without bending the strip | belt-shaped member 50. Also good.
If it does in this way, the full length of the strip | belt-shaped member 50 can be shortened, and it will become easy to suppress interference with another component.

  In the above embodiment, the guide member 57 is attached so as to project downward from the bottom surface of the upper frame 23, but is not limited thereto, and is attached so as to project rearward from the rear surface of the mounting bracket 24. May be.

In the above embodiment, the guide members 56 and 57 are attached so as to protrude downward from the bottom surface of the upper frame 23. However, the guide members 56 and 57 are not limited thereto. The members 56 and 57 may be disposed above the upper frame 23.
In this way, when the vehicle seat S is switched to the storage position, the positional relationship between the belt-like member 50 guided by the guide members 56 and 57 and the attachment / detachment leg 40 is separated to further suppress interference. .

  In the above 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 it is used for a vehicle such as a train or a bus, or a vehicle such as an airplane or a ship. It can also be used as a sheet.

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 base 30, the detachable leg 40, and the belt-like member 50, and the specific configuration of the leg movement restricting means described in the above embodiment are merely examples. However, the present invention is not limited to this.

S vehicle seat 1 seat back 2 seat cushion 3 headrest 4 operation strap 10 back frame 11 connecting bracket 12 reclining device 13 back pivot shaft 14 spiral spring 20 cushion frame 21 frame main body 22 lower frame 22a opening 23 upper frame 24 mounting bracket 25 Leg rotating shaft 26 Leg biasing spring 30 Support base 31 Fixed bracket 32 Movable bracket 33 Seat rotating shaft 34 Spiral spring 35 Fixed shaft 40 Detachable leg 40a Side wall portion 40b Connecting shaft portion 41 Engaging hook 42 Engaging striker 43 Lock Device 50 Band-shaped member 51 One end 52 Other end 53 Mounting plates 54, 55, 56, 57 Guide member

Claims (10)

It has a seat cushion to be a seating part,
A vehicle seat switchable between a use position where a passenger can be seated and a storage position,
A support base fixed to the vehicle body front A,
It mounted on the support base, a seat pivot axis, wherein the seat cushion is connected to one end of the seat front-rear direction or the sheet width direction of the seat cushion so as to be rotatable,
Upper end pivotally attached to the other end of said seat cushion, removable legs engaged portion provided at the lower portion is removably connected to the floor engaging portion fixed to the vehicle body front A When,
A leg urging member attached to the detachable leg and urging the detachable leg to a position connectable to the floor engaging portion;
One end is fixed to the periphery of the support base, the other end is attached to the detachable leg, and the leg urging member is attached to the detachable leg as the seat cushion rotates from the use position to the storage position. and a belt-shaped member to lead so as to rotationally move the seat cushion side against the biasing force of,
Wherein the one end of the belt-shaped member, the other end vehicle seat, characterized in Rukoto provided below the belt-shaped member. The storage position is a position where the seat cushion is stored and rotated upward from the use position,
Wherein the one end of the belt-shaped member is fixed at a lower position than the seat pivot axis in the support base around the other end of the belt-shaped member is attached at a lower position than the upper end portion in the detachable legs,
The vehicle seat according to claim 1, wherein the seat is pulled so as to house and rotate the attachment / detachment leg toward the seat cushion side as the seat cushion rotates. Comprising a cushion frame as a skeleton of the seat cushion;
3. The vehicle according to claim 1, wherein the belt-like member is supported between the support base and the attachment / detachment leg so that a surface thereof overlaps at least a part of a bottom surface of the cushion frame. Sheet. The cushion frame includes a frame body and a plate-like lower frame attached to the bottom surface of the frame body,
The vehicle seat according to claim 3, wherein the belt-shaped member extends so that a surface thereof overlaps a bottom surface of the lower frame. It has a seat cushion that serves as a seat
A vehicle seat switchable between a use position where a passenger can be seated and a storage position,
A support base fixed to the body floor,
A seat rotation shaft attached to the support base and coupled to one end side of the seat cushion in the seat front-rear direction or the seat width direction so that the seat cushion is rotatable;
An detachable leg that has an upper end rotatably attached to the other end of the seat cushion, and an engaged portion provided at the lower end is detachably connected to a floor engaging portion fixed to the vehicle body floor; ,
A leg urging member attached to the detachable leg and urging the detachable leg to a position connectable to the floor engaging portion;
One end is fixed to the periphery of the support base, the other end is attached to the detachable leg, and the leg urging member is attached to the detachable leg as the seat cushion rotates from the use position to the storage position. A belt-like member that is pulled so as to rotate and move toward the seat cushion side against the biasing force of
A cushion frame as a skeleton of the seat cushion;
An attachment member attached to the other end of the belt-shaped member,
The belt-like member is supported between the support base and the detachable leg so that the surface overlaps at least a part of the bottom surface of the cushion frame,
The vehicle seat, wherein the attachment member is attached to the attachment / detachment leg so as to be rotatable. The mounting member is a substantially triangular plate,
The vehicle seat according to claim 5, wherein the plate is narrower on a side closer to the attachment / detachment leg than on a side closer to the belt-like member. The detachable legs include left and right side wall portions arranged at intervals in the seat width direction, and connecting shaft portions that connect the left and right side wall portions,
The vehicle seat according to claim 5 or 6 , wherein the attachment member is rotatably attached to the connecting shaft portion. A seat back provided to be tiltable with respect to the seat cushion;
A locking mechanism for locking the detachable leg to the floor,
The lock mechanism is released by the lying down operation of the seat back,
6. The vehicle according to claim 1, wherein the detachable leg is housed in the seat cushion by a pulling force of the belt-like member when the belt is flipped up and rotated. Sheet. The other end portion of the belt-shaped member is disposed below the lower end of the end portion of the seat cushion on the side where the detachable leg is provided, and the side of the seat cushion on which the support base is provided. The vehicle seat according to claim 1, wherein the vehicle seat is disposed above a lower end of the end portion of the vehicle. The belt-shaped member, from said support base said peripheral fixed to one end portion extending so that the surface is overlapped on the bottom of the cushion frame, is twisted between the overlapping portion and the detachable leg and the cushion frame, The vehicle seat according to any one of claims 3 to 7 , wherein the other end portion is attached so that a surface thereof overlaps a side surface of the detachable leg.

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