JP2017030717A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat which includes a side support device capable of assisting an occupants with getting on/off motions and can suppress an influence on a seat belt when the device is activated.SOLUTION: A vehicle seat S includes a side support device 70 which supports in a manner to allow a movable side part 1ca of a seat cushion 1 to be movable between a normal position and a getting-off assisting position. The side support device 70 is arranged in a front position with respect to a belt part of a seat belt 4 placed in front of a back side part 2c of a seat back 2. In a cushion side part 1c, a fixing side part 1cb for regulating movements of the belt part of the seat belt 4 when the position of the movable side part 1ca is switched by the side support device 70 is provided.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle seat, and more particularly to a vehicle seat provided with a side support device for assisting a passenger to get on and off.

Conventionally, in a seat cushion on which an occupant can be seated, a side portion in the seat width direction is provided such that the seating surface protrudes from the center portion in the seat width direction, and the seating surface is retracted from the center portion. 2. Description of the Related Art A vehicle seat including a side support device that is movably supported between a provided retracted position is known.
When the side portion of the seat cushion is supported by the side support device in the standing position, the occupant's holdability can be improved when the occupant is seated. And when a side part is supported in a retreat position, when a crew member opens a vehicle door and gets on and off, the burden for getting over a crew member's side part can be eased.

For example, in a vehicle seat provided with the boarding / alighting support device described in Patent Document 1, a side frame that supports the side portion of the seat cushion so as to be movable between a standing position and a lying position, and the seating load of the occupant is the seat cushion. And a locking mechanism that locks the side frame when it is hooked on the central portion.
Specifically, the lock mechanism is configured to lock the side portion in an upright position when the occupant is seated on the seat body, and to unlock the side frame when the occupant stands and gets on and off.

Moreover, in the vehicle seat provided with the boarding / alighting support device described in Patent Document 2, a cushion holder that supports the side support cushion so as to be movable between the standing position and the tilting position, and a standing holding device that holds the cushion holder in the standing position. And an upright holding release device that releases the upright holding state of the cushion holder and moves the cushion holder from the upright position to the tilted position.
Specifically, when the vehicle door is opened in order for the occupant to get on and off the vehicle, the cushion holder is released from the standing holding state, and when the vehicle door is closed after the passenger gets on and off, the cushion holder is returned to the standing holding state. .

JP 61-57435 A JP 2007-282746 A

By the way, in the vehicle seat with a boarding / alighting support device such as Patent Documents 1 and 2, a rear seat in which the belt portion of the seat belt is placed on the side portion of the seat back is conceivable. In this case, when the position of the side portion of the seat cushion is switched by the boarding / alighting support device, there is a possibility that the seat belt may be affected, for example, by the lower end of the belt portion contacting the side portion.
Therefore, there has been a demand for a vehicle seat that can suppress the influence on the seat belt even when the position of the side portion of the seat cushion is switched by the boarding / alighting support device.

Moreover, in the boarding / alighting support apparatus like patent document 1, 2, although a passenger | crew's seating operation | movement and the opening / closing operation | movement of a vehicle door are comprised, it has the structure which locks a side part in an upright position, or is unlocked, In cases other than when getting on and off the vehicle, it has been required to securely lock the side portion in the standing position.
For example, if the occupant moves up slightly from the seat body or opens the vehicle door while the occupant is seated, the side part of the seat cushion tilts and sits down. There was a risk of losing the holdability of the passenger.

In general, a vehicle seat includes a reclining device that rotatably connects a seat back to the seat cushion, a slide rail device that connects the seat cushion to the vehicle floor so as to be slidable in the front-rear direction of the seat, and the like. Therefore, when the boarding / alighting support device is attached to the seat cushion, it has been desired to arrange it compactly in consideration of the arrangement relationship so as not to interfere with each other.
Further, since the vehicle seat has a relatively complicated structure by including the above-described device and the like, it has been desired to facilitate the assembly work of the component parts.

In general, it has been desired for passengers to be supported by a boarding / alighting support device, particularly when getting off.
For this reason, there has been a demand for a boarding / alighting support device that can more reliably assist the passenger in getting off the vehicle.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a side support device capable of assisting an occupant's getting-on / off operation, and to affect the seat belt when the device is operated. It is providing the vehicle seat which can suppress this.
Another object of the present invention is to provide a vehicle seat provided with a side support device capable of assisting an occupant's getting-on / off operation while stably securing the holdability of a seated occupant. is there.
Another object of the present invention is to provide a vehicle seat including a side support device that can more reliably assist a passenger to get off the vehicle.

According to the vehicle seat of the present invention, the subject is a seat cushion and a seat back on which the occupant is seated, and at least a part of a side portion in the seat width direction of the seat cushion in which the occupant can normally sit. A vehicle seat comprising a position and a side support device that is supported so as to be switchable between a position and a boarding / alighting assistance position for assisting the passenger's boarding operation or getting off operation, wherein the side support device is The seat back is disposed in front of a part of the seat belt placed in front of the side portion in the seat width direction, and at least one of the seat cushion and the seat back is provided with the side portion by the side support device. To restrict the movement of a part of the seat belt when the position is switched. The belt movement restricting portion is provided, it is solved by.
With the above configuration, it is possible to realize a vehicle seat capable of suppressing the influence on a part of the seat belt when the position of the side portion of the seat cushion is switched by the operation of the side support device.
More specifically, since the movement of a part of the seat belt (belt part) is restricted by the belt movement restricting portion, for example, the occurrence of play of the seat belt can be suppressed, and the passenger's restraining performance by the seat belt is good. Can be secured.

At this time, the belt movement restricting part may restrict at least a part of the side part and a part of the seat belt from contacting each other when the position of the side part is switched.
The belt movement restricting portion may restrict at least a portion of the side portion and a portion of the seat belt so as not to always contact each other.
With the above configuration, the belt movement restricting portion can reliably suppress the influence on a part of the seat belt.

At this time, the side part is supported by the side support device so as to be switchable, a second side part provided between the first side part and a part of the seat belt, It is preferable that the second side portion constitutes at least a part of the belt movement restricting portion.
The first side portion is a movable side portion that is movable between the normal position and the boarding / alighting assistance position, and the second side portion is a fixed side portion that is fixed at the normal position. Good to have.
As described above, the second side portion (fixed side portion) is provided as an escape portion for avoiding contact between the first side portion (movable side portion) supported by the side support device and a part of the seat belt. Therefore, even when the side support device operates, the influence on the seat belt can be more reliably suppressed.

At this time, it comprises a belt assist device capable of moving at least a part of the seat belt to a position that can be easily reached from the seated occupant, and the belt movement restricting portion is operated when the belt assist device is operating, It is preferable that at least a part of the side part and the part of the seat belt moved to the easily reachable position be regulated so as not to contact each other.
With the above configuration, even when a part of the seat belt is pushed out to the front position where it is easy to reach from the occupant by the operation of the belt assist device, the belt movement restricting part causes the side part of the seat cushion and the part of the seat belt to The influence on the seat belt can be suppressed without contacting.

At this time, a belt assist device capable of moving at least a part of the seat belt to a position that can be easily reached from the seated occupant, and a control device that controls operations of the belt assist device and the side support device. The control device controls the operation of the side support device so as not to move at least a part of the side part or moves at least a part of the side part when the belt assist device is operating. It is good to limit the amount.
With the above-described configuration, the belt assist device can be operated with priority, and the seated occupant can more securely take the seat belt and put it on.

At this time, the side support device is a side plate that moves between the normal position and the boarding / alighting assist position while supporting at least a part of the side portion, and a lock device that locks the side plate at the normal position, An unlocking device that unlocks the locked state of the locking device, and the unlocking device is disposed on the side portion of the seat cushion in the seat width direction and operates to release the locked state. A lock release member for releasing the lock state from a lock position for maintaining the lock state by applying a predetermined load to the seating surface of the side portion. It is good to move.
With the above configuration, in order to move the side part of the seat cushion from the normal position to the boarding / alighting assist position when the occupant gets on and off the vehicle, the lock release member is applied by applying a predetermined load to the seating surface of the side portion of the seat cushion. Need to work.
Therefore, as compared with the conventional example, the lock release device can be operated in accordance with the operation from when the occupant gets on and sits down, or the operation from when the occupant sits down to get off.
That is, it is possible to realize a side support device that can assist the occupant's getting-on / off operation while stably securing the seating ability of the occupant.

At this time, the unlocking member is a first unlocking member, and the unlocking device further includes a second unlocking member that operates to release the locked state, and the first unlocking member Is arranged at the center of the seat cushion, and the second unlocking member is preferably arranged at the side of the seat cushion.
With the above configuration, it is necessary to operate the two lock release members in order to move the side portion of the seat cushion from the normal position to the boarding / alighting assist position when the passenger gets on and off the vehicle.
As a result, the side portion can be more reliably locked at the normal position when the occupant is not in the vehicle or when getting out of the vehicle.

At this time, the unlocking device releases the locked state when the second unlocking member moves from the locked position to the unlocked position while the first unlocked member is located at the unlocked position. Good.
With the above configuration, the first unlocking member is located at the unlocked position when the occupant is seated, and the second unlocking member is unlocked from the locked position when the seated occupant is about to get out of the vehicle. Because of the movement to the position, the unlocking member can be operated in a manner that favorably corresponds to the operation in which the seated passenger gets off the vehicle.

According to the first aspect of the invention, it is possible to realize a vehicle seat capable of suppressing the influence on a part of the seat belt when the position of the side portion of the seat cushion is switched by the operation of the side support device.
More specifically, since the movement of a part of the seat belt (belt part) is restricted by the belt movement restricting portion, for example, the occurrence of play of the seat belt can be suppressed, and the passenger's restraining performance by the seat belt is good. Can be secured.
According to the second and third aspects of the invention, the belt movement restricting portion can reliably suppress the influence on a part of the seat belt.

According to the fourth and fifth aspects of the present invention, the second side portion (fixed side portion) serves as a relief portion for avoiding contact between the first side portion (movable side portion) supported by the side support device and a part of the seat belt. ), The influence on the seat belt can be more reliably suppressed even when the side support device operates.
According to the sixth aspect of the present invention, even when the belt assist device is operated, the belt movement restricting portion does not contact the side portion of the seat cushion and a part of the seat belt, thereby affecting the seat belt. Can be suppressed.
According to the seventh aspect of the present invention, the belt assist device can be preferentially operated, and the seated occupant can take the seat belt with his / her hand more securely.

According to the invention of claim 8, in order to move the side portion of the seat cushion from the normal position to the boarding / alighting assist position when the occupant gets on and off the vehicle, a predetermined load is applied to the seating surface of the side portion of the seat cushion. In addition, it is necessary to operate the unlocking member. Therefore, as compared with the conventional example, the lock release device can be operated in accordance with the operation from when the occupant gets on and sits down, or the operation from when the occupant sits down to get off.
According to the ninth aspect of the present invention, it is necessary to operate the two unlocking members in order to move the side portion of the seat cushion from the normal position to the boarding / alighting assist position when the passenger gets on and off the vehicle. As a result, the side portion can be more reliably locked at the normal position in cases other than when the occupant gets on or off the vehicle.
Further, with the above configuration, the seating load from the occupant can be transmitted to the two unlocking members more efficiently at the side portion of the seat cushion.
According to the invention of claim 10, the unlocking member can be operated in a manner suitably corresponding to the operation of the seated occupant getting off the vehicle.

It is an external appearance perspective view of the vehicle seat of this embodiment. 1 is an external plan view of a vehicle seat. It is a figure explaining the state where a sheet main part is a normal position. It is a figure explaining the state which the sheet | seat main body moved from the normal position to the reclining position. It is a perspective view of the seat frame used as a frame. It is a top view of the cushion frame used as a skeleton. It is a disassembled perspective view which shows the assembly structure of a cushion frame and a cushion material. It is a perspective view which shows a slide bar apparatus. It is a figure explaining the state where a seat frame is a normal position. It is a figure explaining the state which the seat frame moved from the normal position to the reclining position. It is a principal part enlarged view of FIG. 1, and is a perspective view which shows a belt assist apparatus. It is a disassembled perspective view of a belt assist device. It is a perspective view which shows a side support apparatus. It is a figure which shows a mode before a passenger | crew gets on. It is a figure which shows the state of the side support apparatus before a passenger | crew gets on. It is a figure which shows a mode at the time of the passenger | crew getting on. It is a figure which shows the state of the side support apparatus at the time of the passenger | crew getting on. It is a figure which shows a mode at the time of the passenger | crew getting on. It is a figure which shows the state of the side support apparatus at the time of the passenger | crew getting on. It is a figure which shows a mode when a passenger | crew is seated. It is a figure which shows the state of the side support apparatus at the time of the passenger | crew sitting. It is a figure which shows a mode when a passenger | crew is getting off. It is a figure which shows the state of the side support apparatus at the time of a passenger | crew getting off. It is a figure which shows a mode when a passenger | crew is getting off. It is a figure which shows the state of the side support apparatus at the time of a passenger | crew getting off. It is a figure which shows a mode after a passenger | crew gets off. It is a figure which shows the state of the side support apparatus after a passenger | crew gets off. In the side support device of Drawing 12B, it is a figure showing the state where the locking device locked the side part in the normal position. FIG. 13B is a view showing a state where the second lock release lever is moved from the lock position to the lock release position in the side support device of FIG. 13B. In the side support device of Drawing 14B, it is a figure showing the state where it moved to the lock release position in order of the 2nd lock release lever and the 1st lock release lever. In the side support device of Drawing 15B, it is a figure showing the state where the 2nd lock release lever returned from the lock release position to the lock position. FIG. 16B is a diagram showing a state where the first lock release lever and the second lock release lever are moved to the lock release position in this order in the side support device of FIG. 16B. FIG. 18B is a diagram showing a state in which the lock of the locking device is released and the side portion is moved from the normal position to the unloading assist position in the side support device of FIG. 17B. It is a figure which returns to a locked position in order of the 1st lock release lever and the 2nd lock release lever in the side support device of Drawing 18B, and shows the state where the lock device was locked again.

Hereinafter, a vehicle seat according to an embodiment of the present invention will be described with reference to FIGS.
The present embodiment is a vehicle seat including a side support device that movably supports at least a part of a side portion of a seat cushion between a normal position and a getting-off assist position, and the side support device is a back of a seat back. When the position of the side part is switched by the side support device on at least one of the side part and the back side part, the belt of the seat belt is disposed in front of the belt part of the seat belt placed in front of the side part. The present invention relates to a vehicle seat invention characterized in that a belt movement restricting portion for restricting movement of the portion is provided.
The belt movement restricting portion includes a plurality of fixed side portions that are a part of the side portion of the seat cushion, a side protruding portion that is a part of the back side portion of the seat back, and one of the movable members of the belt assist device. And a projecting part to be a part.
The side on which the occupant sits with respect to the seat back of the seat is the seat front side.

The vehicle seat S of the present embodiment is a rear seat corresponding to, for example, a rear seat of a vehicle.
As shown in FIGS. 1 and 2, the vehicle seat S includes a seat cushion 1, a seat back 2, and a headrest 3, and a seat body 1 on which a passenger can sit and a seat cushion 1 against a vehicle body floor. A seat switching device having a slide rail device 30 that supports the seat back 2 so as to be movable back and forth, and a slide bar device 40 that supports the seat back 2 so as to be movable up and down with respect to the vehicle body base on the rear side of the seat back 2. I have.
The vehicle seat S is a seat that can switch a seat body between a normal position shown in FIG. 3A and a reclining position shown in FIG. 3B by using a seat switching device.
Specifically, in the vehicle seat S, when the slide rail device 30 is operated from the normal position in FIG. 3A, the seat cushion 1 slides forward and the seat back 2 linked to the seat cushion 1 is linked. Is pulled forward. Then, the upper part of the seat back 2 slides downward while being supported by the slide bar device 40, and the lower part of the seat back 2 rotates and moves forward with respect to the upper part. As a result, the vehicle seat S moves to the reclining position in FIG. 3B.

Further, as shown in FIGS. 1 and 2, the vehicle seat S includes a belt assist device 50 that is attached to an upper portion of the back side portion 2 c of the seat back 2.
As shown in FIG. 9, the vehicle seat S uses at least a part of the seat belt 4 placed in front of the back side portion 2 c of the seat back 2 by using the belt assist device 50. It is a sheet that can be moved to a position where it can be easily reached.
Specifically, in the vehicle seat S, by operating the belt assist device 50, both between the front surface of the seat back 2 and the seat belt 4 and between the upper end of the seat back 2 and the seat belt 4. A part of the seat belt 4 can be pushed out from behind so that a gap is formed.

Further, as shown in FIGS. 1 and 2, the vehicle seat S has a normal position where the occupant can sit at least a part of the cushion side portion 1c of the seat cushion 1 and an unloading assist to assist the occupant to get off the vehicle. A side support device 70 that is supported so as to be movable between positions, a lock device 80 that locks a part of the cushion side portion 1c at a normal position, and an unlock device 90 that releases the lock state of the lock device 80. It is equipped with.
The vehicle seat S is a seat capable of assisting the getting-off operation of a seated occupant by operating the side support device 70, and the movable side portion 1ca of the cushion side portion 1c is shown in FIG. As shown in FIG. 17, it moves between the normal position provided so that the seating surface protrudes from the cushion central portion 1d and the unloading assistance position provided so that the seating surface moves backward from the cushion central portion 1d. It is a possible sheet.
Therefore, when the cushion side portion 1c is supported at the normal position by the side support device 70, the holdability of the seated occupant can be improved. In addition, when the cushion side portion 1c is supported at the getting-off assist position, it is possible to reduce a burden for the passenger to get over the cushion side portion 1c when opening the vehicle door and getting off the vehicle.

As shown in FIGS. 1 and 2, the seat cushion 1 is a seating portion that supports an occupant from below, and is configured by placing a cushion material 1 a on a cushion frame 10 serving as a skeleton and covering with a skin 1 b. Has been.
The seat back 2 is a backrest portion that supports the back of the occupant from behind, and is configured by placing a cushion material 2a on a back frame 20 serving as a skeleton and covering it with a skin material 2b.
The headrest 3 is a head that supports the head of an occupant from behind, and is configured by placing a cushion pad 3a on a pillar (not shown) serving as a core material and covering with a skin material 3b.
The left and right side portions of the seat cushion 1 and the seat back 2 in the seat width direction are respectively formed as a cushion side portion 1c and a back side portion 2c that support a seated occupant from the outside in the seat width direction. .

The cushion side portion 1c includes a movable side portion 1ca that is supported so as to be switched by the side support device 70, and a fixed side portion 1cb that is disposed at a rear position relative to the movable side portion 1ca and is always fixed at a normal position. , Is composed of.
A side groove 1cc extending along the seat width direction is formed between the movable side portion 1ca and the fixed side portion 1cb, and between the cushion side portion 1c and the cushion center portion 1d, it extends along the seat front-rear direction. Side grooves 1cd are formed.
The back side portion 2c includes a side protruding portion 2ca that slightly protrudes forward at the outer end portion in the seat width direction.
The fixed side portion 1cb and the side protrusion 2ca are part of a belt movement restricting portion for restricting movement of the belt portion of the seat belt 4.

The cushion frame 10 is formed of a substantially rectangular frame body serving as a skeleton, and is disposed on the left and right sides and extends in the front-rear direction of the seat, as shown in FIGS. It is mainly composed of a front frame 12 disposed in front of the side frames 11 and extending in the left-right direction, and a substantially U-shaped rear frame 13 connecting the rear portions of the side frames 11.
A plate-like support frame 14 that connects the cushion frame 10 and the slide rail device 30 is attached to the bottom surfaces of the side frame 11, the front frame 12, and the rear frame 13. A mounting bracket 15 for mounting the cushion material 1a is provided.
Furthermore, links 16 for linking the cushion frame 10 and the back frame 20 are provided on the left and right outer surfaces of the mounting bracket 15.

The support frame 14 is formed of a substantially rectangular plate-like frame, is disposed in front of the front frame 12, and supports a front support frame portion 14a that supports a thigh portion of a seated occupant and both left and right end portions of the front support frame portion 14a. Left and right side support frame portions 14b that are attached to the upper surfaces of the left and right slide rail devices 30a and 30b, respectively, and extend rearward from the central portion of the front support frame portion 14a and are attached to the upper surface of the central slide rail device 30c. It is mainly comprised from the center support frame part 14c attached.
At the front end portion of the front support frame portion 14a, left and right mounting holes 14aa for mounting the cushion material 1a are formed at a predetermined interval in the left-right direction, and the left side support frame portion 14b has A side support device 70 is attached.

As shown in FIG. 6, the mounting bracket 15 includes an engagement hole 15 a for engaging a U-shaped rear engagement protrusion 1 aa formed at the rear end portion of the cushion material 1 a and extending rearward. ing.
Specifically, the cushion material 1a has a rear engagement protrusion 1aa and a front position formed with respect to the rear engagement protrusion 1aa and extending downward, and is engaged with the left and right attachment holes 14aa of the front support frame portion 14a. Left and right front engaging protrusions 1ab for fitting are provided.
With the above configuration, the cushion material 1a can be attached to the cushion frame 10 by an easy assembly operation.

The link 16 is mainly composed of an upper link 16 a to which an upper end portion is attached so as to sandwich the lower end portion of the back frame 20, and a lower link 16 b that connects the lower end portion of the upper link 16 a and the mounting bracket 15. Yes.
The lower link 16 b has an upper end portion attached to the upper link 16 a via a link rotation shaft 16 c and a lower end portion attached to the mounting bracket 15.

The back frame 20 is composed of a substantially rectangular frame that is a skeleton of the seat back 2, and as shown in FIG. 4, constitutes the upper half of the back frame 20 and is an upper frame composed of a substantially U-shaped pipe member. 21 and the lower frame 22 comprising the lower half of the back frame 20 and made of a substantially inverted U-shaped pipe member, and the plate-like center extending in the left-right width direction by connecting the upper frame 21 and the lower frame 22 The frame 23 is mainly composed of.
The upper frame 21 is arranged on the left and right sides, and connects the left and right side frame portions 21a extending in the vertical direction with the upper end portions of the left and right side frame portions 21a, and the upper frame portion 21b for connecting the headrest 3. And a plate-like connecting frame portion 21c for connecting the slide bar device 40 to the upper and lower central portions of the left and right side frame portions 21a.
The lower frame 22 mainly includes left and right side frame portions 22a and a lower frame portion 22b that connects the lower end portions of the left and right side frame portions 22a and to which the link 16 is attached.
The central frame 23 is attached to the upper frame 21 so that the upper portion thereof is integrally attached, and the lower portion is attached to the lower frame 22 so as to be rotatable via the back rotating shaft 24.

An attachment wire 25 for attaching the belt assist device 50 is attached to the outer surface of the left side frame portion 21a in the upper frame 21 so as to protrude outward.
More specifically, a clip member (not shown) provided integrally with the attachment plate 51 of the belt assist device 50 is attached to the attachment wire 25.

<Sheet switching device>
Next, specific configurations of the slide rail device 30 and the slide bar device 40 constituting the seat switching device will be described with reference to FIGS. 3A and 3B to 8A and 8B.
As shown in FIGS. 2, 3A, B, and 5, the slide rail device 30 is a device that supports the seat cushion 1 so as to be movable back and forth with respect to the vehicle body floor, and supports both left and right end portions of the seat cushion 1. The left and right slide rail devices 30a and 30b, and the central slide rail device 30c that supports the central portion of the seat cushion 1 are provided.
More specifically, the left slide rail device 30a is attached to the front portion of the cushion frame 10, the right slide rail device 30b is attached from the center portion to the rear portion of the cushion frame 10, and the center slide rail device 30c is the cushion frame. 10 is attached to the rear part.

As shown in FIGS. 3A and 3B, the slide rail device 30 is fixed to the vehicle body floor and extends left and right lower rails 31, and left and right upper rails 32 slidably supported along the lower rails 31. FIG. 5 shows a lock member (not shown) that locks the upper rail 32 so as not to slide, a lock release member (not shown) that releases the lock state of the lock member, and a drive operation of the unlocked upper rail 32 in the front-rear direction. The drive motor 33 shown in FIG.
The slide rail device 30 includes an ECU (electronic control circuit) (not shown) as a control device, a drive circuit that supplies drive power to the drive motor 33, and a vehicle body that is connected to the drive motor 33 via the drive circuit. And a power supply.

The lower rail 31 is formed of a long hollow body, and is disposed on the left and right sides with a gap in the seat width direction, and a housing space having a substantially convex cross section is formed along the seat front-rear direction, along the seat front-rear direction. An opening is formed on the upper surface.
The upper rail 32 is formed of a long body that slides along the lower rail 31 while being inserted into the accommodation space of the lower rail 31, and an upper portion thereof is coupled to the cushion frame 10 via the support frame 14.

As shown in FIGS. 7, 8A, and B, the slide bar device 40 is a device that supports the seat back 2 so as to be movable up and down with respect to the vehicle body base on the rear side of the seat back 2, and is provided on the vehicle body base. Stored in the stored recess.
The slide bar device 40 is fixed to the vehicle body base via a mounting bracket 41, and is provided on the rear surface of the upper frame 21 of the back frame 20 and the left and right slide bars 42 extending in the vertical direction with an interval in the horizontal direction. The slide cylinder 44 is mainly composed of a slide cylinder 44 which is fixed via the mounting bracket 43 and supported so as to be movable up and down while being inserted into the slide bar 42.

In the above configuration, in the vehicle seat S, the cushion frame 10 slides forward from the normal position in FIG. 8A by moving the upper rail 32 forward of the seat with respect to the lower rail 31 using the slide rail device 30. The back frame 20 connected by the cushion frame 10 and the link 16 is pulled forward.
Then, in the back frame 20, the slide frame 44 is moved downward with respect to the slide bar 42 using the slide bar device 40, so that the upper frame 21 slides downward and the lower frame 22 moves to the upper frame 21. On the other hand, it rotates and moves forward of the seat.
As a result, the vehicle seat S moves to the reclining position in FIG. 8B.

<Belt assist device>
Next, a specific configuration of the belt assist device 50 will be described with reference to FIGS. 9 and 10.
As shown in FIG. 9, the belt assist device 50 is an assist device that can push out at least a part of the seat belt 4 forward and upward.
The belt assist device 50 is attached via an attachment wire 25 provided on the outer surface of the back frame 20 shown in FIG. 4, and has a vertically long attachment plate 51 and a storage opening formed at the upper end of the attachment plate 51. A concave storage plate 52 fitted into the portion 51 a, a concave support plate 53 attached to the front surface of the storage plate 52, a movable member 55 attached to the inside of the support plate 53 via a rotation shaft 54, The auxiliary spring 56 mainly biases the movable member 55 toward the protruding position shown in FIG.

The belt assist device 50 rotates between a storage position where the movable member 55 is stored inside the storage plate 52 of the seat back 2 and a protrusion position where the movable member 55 protrudes forward from the seat back 2 and pushes out a part of the seat belt 4. It is a device to be moved.
The belt assist device 50 is integrally stored without substantially protruding from the outer surface of the seat back 2 when the movable member 55 is in the storage position shown in FIG. 1, and the movable member 55 is in the protruding position shown in FIG. A part of the seat belt 4 is projected from the outer surface of the seat back 2 while being in the seat, and a part of the seat belt 4 is pushed forward and upward.

  The movable member 55 includes a protruding portion 55a that protrudes forward at an outer end portion in the seat width direction, and the protruding portion 55a is part of a belt movement restricting portion for restricting movement of the belt portion of the seat belt 4. Become.

The belt assist device 50 connects the drive motor (not shown) stored on the rear surface of the storage plate 52, the drive motor and the movable member 55, and supports the operation of the drive motor to rotate the movable member 55. And a drive shaft (not shown) that moves up and down.
Further, the belt assist device 50 is seated on an ECU (not shown) as a control device, a drive circuit that supplies drive power to the drive motor, a vehicle body power supply that is connected to the drive motor via the drive circuit, and an occupant. It is desirable to further include a seating sensor (not shown) that detects this and a buckle sensor (not shown) that detects that the tongue plate 4a of the seat belt 4 is connected to the buckle 4b.
The ECU may control the operation of the drive motor, that is, the operation of the movable member 55 based on the signals input from these sensors.
For example, when the ECU receives an on signal from the seating sensor and does not receive an on signal from the buckle sensor, the ECU supplies driving power to the driving motor and moves the movable member 55 to the protruding position to thereby move the seat belt. 4 should be pushed out.
Further, for example, when an ON signal is received from the seating sensor and the buckle sensor, it is preferable to supply driving power to the driving motor and return the movable member 55 from the protruding position to the storage position.

<Side support device>
Next, a specific configuration of the side support device 70 will be described with reference to FIGS.
The side support device 70 is a device that supports the cushion side portion 1c so as to be movable in response to the passenger's dismounting operation. As shown in FIG. 12, the side support device 70 extends over the cushion side portion 1c and the cushion central portion 1d. Has been placed.
As shown in FIG. 11, the side support device 70 includes a plate-like side plate 71 that supports the cushion side portion 1c from below, a side bracket 72 having a U-shaped vertical cross section that is attached to the bottom surface of the side plate 71, and a side plate. 71 and the side bracket 72 are supported via a rotating shaft 73 so as to be rotatable between the normal position and the alighting assistance position, and a central portion is connected to the side base 74 and outward from the side base 74. It is mainly composed of an attachment wire 76 extending so as to project.
The attachment wire 76 is inserted into an attachment hole (not shown) provided inside the cushion material 1a, and is a member for attaching the side support device 70 inside the cushion side portion 1c.

As shown in FIGS. 2 and 11, the side plate 71 is made of a metal plate, and is disposed at the central portion in the seat front-rear direction in the cushion side portion 1 c.
A pair of a rectangular through hole 71a penetrating in the vertical direction and an outer edge portion of the through hole 71a formed by bending both ends in the front-rear direction of the sheet downward on the outer surface of the side plate 71 on the upper surface of the side plate 71. Side wall portion 71b.
A second lock release lever 94 is disposed in the portion where the through hole 71a is formed, and the second lock release lever 94 can be rotated by a pair of side wall portions 71b via a rotation shaft 95. Is attached.

As shown in FIG. 11, the side bracket 72 is formed of a U-shaped body elongated in the seat width direction, and includes an upper wall portion 72a for attaching the side plate 71, and both end portions in the seat front-rear direction of the upper wall portion 72a. And a pair of side wall portions 72b that are bent and extended downward.
The pair of side wall portions 72b is attached to the side wall portion 74b of the side base 74 made of a U-shaped body via a rotation shaft 73 extending along the front-rear direction of the seat.
Moreover, as shown in FIG. 11, the locking device 80 and the components of the unlocking device 90 are attached to the inner side surface of the rear side wall 72b.

The side base 74 is mainly composed of a bottom wall portion 74a attached on the support frame 14, and a pair of side wall portions 74b that are bent upward and extend from both end portions of the bottom wall portion 74a in the seat front-rear direction. Yes.
Further, the second side base 75 is attached to the inside of the cushion side portion 1c via an attachment wire (not shown) at a position spaced apart from the side base 74 at the rear of the seat. A first unlocking lever 91 is rotatably attached to the second side base 75 via a rotation shaft 92 extending along the seat front-rear direction.

The locking device 80 is a device that locks the side plate 71 and the side bracket 72 in a normal position, and is disposed on the inner surface of the side wall 72b on the rear side of the seat in the side bracket 72 as shown in FIGS. ing.
The lock release device 90 is a device that releases the locked state of the lock device 80, and includes a first lock release lever 91 and a second lock release lever 94 as shown in FIG.
The first lock release lever 91 is a member that rotates between the lock position shown in FIG. 11 around the rotation shaft 92 and the lock release position moved downward from the lock position, and the first transmission cable 93. Is biased to the locked position.
The second lock release lever 94 is a member that rotates between the lock position shown in FIG. 11 around the rotation shaft 95 and the lock release position moved below the lock position, and the second transmission cable 96. Is biased to the locked position.

The first lock release lever 91 is formed of a substantially L-shaped plate body, is located on the inner side in the seat width direction than the side plate 71 and extends in the front-rear direction of the seat, and the side plate 71. 2nd extension part 91b located in the sheet rear side and extending in the sheet width direction. And as shown in FIG. 5, it is arrange | positioned avoiding the position which overlaps with the slide rail apparatus 30 up and down. Similarly, the side plate 71 is arranged so as to avoid a position overlapping the slide rail device 30 in the vertical direction.
The second unlocking lever 94 is formed of a substantially rectangular plate body, is disposed on the outer side in the seat width direction than the first unlocking lever 91, and is disposed on the front side of the seat with respect to the first unlocking lever 91. ing.

As shown in FIG. 2, the first lock release lever 91 and the second lock release lever 94 are disposed inside the seat cushion 1 and are disposed in front of the belt portion of the seat belt 4 (the front end of the belt portion). ing.
Further, the first lock release lever 91 and the second lock release lever 94 are arranged at positions avoiding the belt portion of the seat belt 4 in the seat width direction. More specifically, the first lock release lever 91 is disposed inside the belt portion of the seat belt 4 in the seat width direction, and the second lock release lever 94 is disposed outside the belt portion.
Therefore, interference between the lock release levers 91 and 94 and the belt portion of the seat belt 4 can be suppressed.
Details of the lock device 80 and the lock release device 90 will be described later.

<< Operation of side support device >>
Next, the operation of the side support device 70 will be described with reference to FIGS.
First, as shown in FIG. 12A, before the occupant gets on, as shown in FIG. 12B, the side support device 70 supports the cushion side portion 1c at the normal position.
Further, the locking device 80 locks the cushion side portion 1c at the normal position, and the first unlocking lever 91 and the second unlocking lever 94 of the unlocking device 90 are respectively urged to the locking position. ing.

When the occupant sits down on the cushion side 1c to get on as shown in FIG. 13A, the second unlocking lever 94 is locked from the locked position by applying a predetermined seating load as shown in FIG. 13B. Rotate to the release position.
Here, the lock state of the lock device 80 is not released only by moving the second lock release lever 94 only to the lock release position.

14A, when the occupant sits down on the cushion side portion 1c and the cushion center portion 1d to get on, the second unlocking lever 94 is in the unlocked position as shown in FIG. 14B. The first lock release lever 91 rotates from the lock position to the lock release position when a predetermined seating load is applied.
Here, when the second unlocking lever 94 and the first unlocking lever 91 are moved to the unlocking position in this order, the locked state of the locking device 80 is not released.

When the occupant is seated as shown in FIG. 15A, as shown in FIG. 15B, the second lock release lever 94 is released from the predetermined seating load and returned from the lock release position to the lock position. In addition, the first unlocking lever 91 is located at the unlocking position.
At this time, since the cushion side portion 1c is supported at the normal position by the side support device 70, the holdability of the seated occupant can be ensured.

16A, when the occupant tries to get off the vehicle with the body approaching the door, as shown in FIG. 16B, with the first unlocking lever 91 positioned at the unlocking position, the second unlocking lever 94 is rotated from the locked position to the unlocked position by applying a predetermined seating load.
Here, when the first unlocking lever 91 and the second unlocking lever 94 are moved to the unlocking position in this order, the locked state of the locking device 80 is released.

Then, when the occupant tries to get off the vehicle with the body closer to the door as shown in FIG. 17A, a seating load is further applied to the cushion side 1c as shown in FIG. 17B, so that the cushion side 1c becomes the side plate. Together with 71, it rotates from the normal position to the alighting assistance position.
As a result, it is possible to reduce the burden of getting over the cushion side portion 1c of the passenger getting off.

Finally, when the occupant finishes getting off as shown in FIG. 18A, as shown in FIG. 18B, the first unlocking lever 91 and the second unlocking lever 94 are returned to the locked position again, and the locking device 80 is moved to the cushion side. It returns to the state which locked the part 1c in the normal position.
By the above series of operations, the side support device 70 can assist the occupant's getting-off operation while stably securing the holdability of the occupant seated. Moreover, since it becomes the structure which does not incline the cushion side part 1c at the time of a boarding operation of a passenger | crew, consideration is given so that a passenger | crew can get on reliably.
In the side support device 70, when the belt assist device 50 pushes out a part of the seat belt 4 as shown in FIG. 9, it is controlled by the control device so that the lock release device 90 cannot be released. desirable.
Specifically, it is desirable that the control device controls the operation of the side support device 70 so as not to move the movable side portion 1ca of the cushion side portion 1c or to limit the movement amount of the movable side portion 1ca.

<< Locking device, unlocking device >>
Next, specific configurations of the lock device 80 and the lock release device 90 will be described with reference to FIGS.
As shown in FIG. 19, the lock device 80 uses a lock lever 81 attached to the inner side surface of the side bracket 72 so as to be rotatable via a support shaft 82, and a fixing bolt 84 on the inner side surface of the side base 74. It is mainly composed of a lever 83 to be locked.
The lock lever 81 and the locked lever 83 are disposed at positions facing each other.

The lock device 80 locks the side plate 71 (side bracket 72) in the normal position when the lock lever 81 is in the engagement position shown in FIG. That is, the cushion side portion 1c is locked at the normal position.
Further, the lock device 80 releases the locked state of the side plate 71 (side bracket 72) when the lock lever 81 is in the release position shown in FIG. That is, the locked state of the cushion side portion 1c is released.

The lock lever 81 is a member that rotates between an engagement position shown in FIG. 19 around a support shaft 82 extending in the seat width direction and a disengagement position that moves to the front of the seat from the engagement position. It is biased in the direction of arrow A shown in FIG. 19 by a biasing spring (not shown). That is, it is biased from the engagement position side to the disengagement position side.
The lock lever 81 is disposed on the opposite side of the engagement protrusion 81a in the front-rear direction of the seat with an engagement protrusion 81a that engages with an engagement groove 83a provided in the locked lever 83, and is connected by a relay lever 120 described later. A held portion 81b to be held and a through protrusion 81c that protrudes inward in the sheet width direction and is arranged so as to be movable in a through hole 110b provided in the first transmission lever 100 described later are formed. Yes.
The lock lever 81 is normally held by the relay lever 120 and is disposed at the engagement position where the engagement protrusion 81a is engaged with the engagement groove 83a.

As shown in FIG. 19, the unlocking device 90 includes a first transmission lever 100 that is rotatably attached to the inner surface of the side bracket 72 via the first connection shaft 101, and a second connection to the inner surface of the side bracket 72. A second transmission lever 110 that is rotatably attached via a shaft 111, and a relay lever 120 that is attached between the side bracket 72 and the first transmission lever 100 and is rotatable via a first connecting shaft 101. It has more.
When the first transmission lever 100 and the second transmission lever 110 are moved from the reference position shown in FIG. 19 to the transmission position shown in FIG. 23, the lock release device 90 moves the lock lever 81 to the position shown in FIG. It can be moved from the engagement position shown to the disengagement position shown in FIG.

The first transmission lever 100 is centered on the first connecting shaft 101 extending along the sheet width direction, the reference position shown in FIG. 19, the intermediate position shown in FIG. 22 moved below the reference position, and the intermediate position. It is a member which rotates between the transmission positions shown in FIG.
The first transmission lever 100 is biased in the direction of arrow B shown in FIG. 19 by a biasing spring (not shown). That is, it is urged from the transmission position side to the reference position side.
The first transmission lever 100 is provided with an attachment hole 110a for attaching the cable attachment end portion 93a of the first transmission cable 93, and on the opposite side of the attachment hole 110a with respect to the first connecting shaft 101. A through hole 110b for penetrating the 81 through protrusion 81c and a fitting hole for fitting the fitting protrusion 120a provided on the relay lever 120 are formed.

The first transmission lever 100 is normally urged in the direction of arrow B by an urging spring (not shown) and arranged at the reference position. At this time, the outer edge portion of the through hole 110b and the through protrusion 81c of the lock lever 81 are disposed at positions where they do not contact each other.
And the 1st transmission lever 100 is rotationally moved from a reference position to an intermediate position by being pulled by the 1st transmission cable 93 with the rotation operation of the 1st lock release lever 91. FIG. At this time, the outer edge portion of the through hole 110b contacts the through protrusion 81c, so that the first transmission lever 100 is stably stopped at the intermediate position. That is, the through protrusion 81c serves as a stopper.
Then, the first transmission lever 100 further moves from the intermediate position to the transmission position via the relay lever 120 as the second transmission lever 110 rotates. At this time, the outer edge portion of the attachment hole 110a contacts the cable attachment end portion 93a, so that the first transmission lever 100 is stably stopped at the transmission position. That is, the cable attachment end portion 93a serves as a stopper.

The second transmission lever 110 rotates between the reference position shown in FIG. 19 and the transmission position shown in FIG. 23 moved upward from the reference position, with the second connecting shaft 111 extending along the sheet width direction as the center. It is a member.
The second transmission lever 110 is biased in the direction of arrow C shown in FIG. 19 by a biasing spring (not shown). That is, it is urged from the transmission position side to the reference position side.
The second transmission lever 110 is provided with a pressing lever 112 that is rotatably attached via a connecting pin 113 extending in the front-rear direction of the seat and that presses the relay lever 120.
The second transmission lever 110 is provided with an attachment hole 110a for attaching the cable attachment end portion 96a of the second transmission cable 96, and the second connection shaft 111 on the opposite side of the attachment hole 110a. A through hole 110b for penetrating the through protrusion 112a of 112 is formed.

The second transmission lever 110 is normally urged in the direction of arrow C by an urging spring (not shown) and arranged at the reference position. Further, the pressing lever 112 is also urged in the direction of arrow D by an urging spring (not shown) and is arranged at the reference position shown in FIG.
At this time, the penetrating protrusion 112a of the pressing lever 112 and the outer edge portion of the through hole 110b are disposed at positions where they abut each other.
The second transmission lever 110 is rotated by the second transmission cable 96 to rotate from the reference position to the transmission position as the second lock release lever 94 rotates. Further, the pressing lever 112 also rotates from the reference position to the pressing position shown in FIG.
At this time, the pressing portion 112 b of the pressing lever 112 pushes and moves the pressing receiving portion 120 b provided on the relay lever 120, so that the relay lever 120 rotates together with the first lock release lever 91.

The relay lever 120 has the holding position shown in FIG. 19 around the first connecting shaft 101, the intermediate position shown in FIG. 22 moved upward from the holding position, and the intermediate position shown in FIG. 23 moved further upward from the intermediate position. It is a member that rotates between the separation position.
The relay lever 120 is coupled to the first transmission lever 100 via the first coupling shaft 101 and the fitting protrusion 120a, and is biased in the same arrow B direction as the biasing direction of the first transmission lever 100. That is, it is urged from the separation position side to the holding position side.
The relay lever 120 includes a fitting protrusion 120 a, a pressure receiving portion 120 b disposed on the opposite side of the first connecting shaft 101 from the fitting protrusion 120 a, and a fitting protrusion 120 a with respect to the first connecting shaft 101. And a holding portion 120c that holds the held portion 81b of the lock lever 81 is formed.

The relay lever 120 is normally urged in the direction of arrow B and arranged at the holding position. Here, the holding position is a position where the holding portion 120c holds the lock lever 81 at the engagement position.
Then, the relay lever 120 rotates from the holding position to the intermediate position with the rotation operation of the first transmission lever 100. At this time, the holding portion 120c maintains a state where the lock lever 81 is held at the engagement position.
The relay lever 120 rotates from the intermediate position to the disengagement position with the rotation of the second transmission lever 110 (pressing lever 112). Here, the disengagement position is a position where the holding portion 120c is disengaged from the state in which the lock lever 81 is retained at the engagement position.
As a result, the lock lever 81 is biased in the direction of arrow A and moves from the engagement position to the disengagement position. That is, the lock state of the lock device 80 is released.

<< Operation of locking device and unlocking device >>
Next, specific operations of the lock device 80 and the lock release device 90 will be described with reference to FIGS. 12 to 18 and FIGS. 19 to 25.
First, as shown in FIG. 12A, before the occupant gets on, as shown in FIG. 19, the lock lever 81 is disposed at the engagement position where the lock lever 81 is engaged.
Moreover, the 1st transmission lever 100 and the 2nd transmission lever 110 (pressing lever 112) are arrange | positioned in the reference position, and the relay lever 120 is arrange | positioned in the holding position.
That is, as shown in FIG. 12B, the lock device 80 is in a state where the cushion side portion 1c is locked at the normal position.

When the occupant sits down on the cushion side portion 1c to get on as shown in FIG. 13A, the second transmission lever 110 (pressing lever 112) is moved by the second unlocking lever 94 as shown in FIG. It is pulled to rotate from the reference position to the transmission position.
At this time, the pressing lever 112 does not push and move the relay lever 120 and swings.
As a result, the lock state of the lock device 80 is not released while the lock lever 81 remains in the engaged position.

Then, as shown in FIG. 14A, when the occupant sits down on the cushion side portion 1c and the cushion central portion 1d to get on, as shown in FIG. 21, the second transmission lever 110 (pressing lever 112) is positioned at the transmission position. In this state, the first transmission lever 100 is pulled by the first lock release lever 91 to rotate from the reference position to the intermediate position.
Further, the relay lever 120 moves together with the first transmission lever 100 to move from the holding position to the intermediate position.
At this time, the pressing lever 112 and the relay lever 120 are in a state of being swung with respect to each other.
As a result, the lock state of the lock device 80 is not released while the lock lever 81 remains in the engaged position.

When the occupant is seated as shown in FIG. 15A, the second transmission lever 110 (pressing lever 112) is released from the pulling operation of the second unlocking lever 94 as shown in FIG. Then, the position returns from the transmission position to the reference position again.
At this time, the pressing lever 112 rotates about the connecting pin 113 with respect to the second transmission lever 110, so that the pressing lever 112 swings over the relay lever 120 and returns to the reference position.
As a result, the lock state of the lock device 80 is not released while the lock lever 81 remains in the engaged position.

16A, when the occupant tries to get off the vehicle with the body approaching the door, as shown in FIG. 23, the second transmission lever 110 (pressing force) with the first transmission lever 100 positioned at the intermediate position as shown in FIG. The lever 112) is pulled by the second unlocking lever 94 and rotates from the reference position to the transmission position.
Further, when the relay lever 120 is pushed and moved by the pressing lever 112, the relay lever 120 rotates from the intermediate position to the separation position.
As a result, the lock lever 81 is released from the state held at the engagement position by the relay lever 120, and rotates from the engagement position to the release position. That is, the lock state of the lock device 80 is released.

As shown in FIG. 17A, when the occupant tries to get off the vehicle by moving the body further toward the door, as shown in FIG. 24, the side plate 71 (side bracket 72) applies the seating load of the occupant to the side base. Rotate and move from the normal position to the dismount assistance position with respect to 74.
As a result, as shown in FIG. 17A, the cushion side portion 1c rotates from the normal position to the unloading assist position.

Finally, when the occupant finishes getting off as shown in FIG. 18A, as shown in FIG. 25, the first transmission lever 100 and the second transmission lever 110 (pressing lever 112) return to the reference position again, and the relay lever 120 is held. Return to position.
Further, the lock lever 81 returns to the engaged position where the lock lever 81 is engaged.
By the series of operations described above, switching between the locked state and the unlocked state by the lock device 80 and the unlock device 90 is performed.

<< Positional relationship between cushion side and side support device >>
In the above embodiment, as shown in FIG. 2, the side groove 1cd between the cushion side portion 1c and the cushion central portion 1d is positioned away from the belt portion of the seat belt 4 in the seat width direction (inside the belt line). Position).
Therefore, even when the position of the movable side portion 1ca is switched by the operation of the side support device 70, the belt portion can be prevented from entering the side groove 1cd, and the influence on the seat belt can be suppressed.

In the above embodiment, as shown in FIG. 2, the side groove 1 cc between the movable side portion 1 ca and the fixed side portion 1 cb is inclined so that the inner end portion in the seat width direction is positioned forward of the outer end portion. Are arranged.
Therefore, in the side groove 1cc, interference with the belt portion can be suppressed at the inner end portion close to the belt portion of the seat belt 4, and the area of the movable side portion 1ca is secured at the outer end portion far from the belt portion. The functionality of getting on and off the passenger can be ensured.

In the above embodiment, as shown in FIG. 2, the rear end of the side plate 71 of the side support device 70 and the rear end of the movable side portion 1ca of the cushion side portion 1c extend so as to be substantially parallel. Then, passengers can get off the vehicle.

In the said embodiment, as shown in FIG. 2, a part of 1st lock release lever 91 is arrange | positioned using the internal space or downward space of the fixed side part 1cb among the cushion side parts 1c.
Therefore, a compact arrangement of the side support device 70 can be realized.

<Other embodiments>
In the above embodiment, the cushion side portion 1c is movable between the normal position shown in FIG. 12 and the unloading assist position where the cushion material 1a moves backward as shown in FIG. The auxiliary position can be changed without any particular limitation.
For example, the cushion material 1a may be retracted so as to be stored behind the seat, or the cushion material 1a may be partially retracted downward.
Further, for example, the cushion side portion 1c may be slid so that at least a part of the cushion side portion 1c protrudes outward in the seat width direction. Even if it is made to protrude in this way, a passenger | crew's alighting operation can be assisted.

  In the above-described embodiment, the cushion side portion 1c is configured to move from the normal position to the unloading assist position with the seating load of the occupant after the lock state of the locking device is released, but is particularly limited. Instead, it may be configured to automatically move from the normal position to the disembarkation assist position.

In the above-described embodiment, the side support device 70 is configured as a device capable of assisting the passenger to get off the vehicle, but is not particularly limited, and can assist the passenger to get on and off the vehicle. It may be configured as a device.
In that case, it is more desirable that the amount of movement of the cushion side portion 1c by the side support device 70 is smaller when the occupant is getting on the vehicle than when the passenger is getting off.
Moreover, you may be comprised as an apparatus which can assist only a passenger | crew's boarding operation | movement.

In the above embodiment, the side support device 70 (the lock release device 90) is disposed on the cushion side portion 1c of the seat body, but is not particularly limited, and is disposed on the side portion of the seat body in the seat width direction. It should be.
The side portion includes, for example, the side portion of the cushion central portion 1d in addition to the cushion side portion 1c.

  In the above embodiment, the unlocking device 90 includes two unlocking members, the first unlocking lever 91 and the second unlocking lever 94, but is not particularly limited, for example, the first unlocking lever 91. You may have only.

In the above embodiment, the unlocking device 90 is configured to be unlocked when moved to the unlocking position in the order of the first unlocking lever 91 and the second unlocking lever 94, but is particularly limited. It can be changed.
For example, the lock may be released when the first lock release lever 91 and the second lock release lever 94 are simultaneously moved to the lock release position, or the second lock release lever 94 and the first lock release lever 91 in this order. The lock may be released when moving to the unlock position.

In the above embodiment, as shown in FIG. 1, the first unlocking lever 91 is disposed in the cushion central portion 1d, and the second unlocking lever 94 is disposed in the cushion side portion 1c. Although it arrange | positions in the left-right outer side rather than the right-left center position of the back | bag 2 and a headrest, and is arrange | positioned in the right-and-left outer side from the seating center position when a passenger | crew seated, it can change, without being specifically limited.
For example, the first lock release lever 91 may be arranged at a predetermined position of the seat cushion 1 or the seat back 2, and the second lock release lever 94 may be arranged at a predetermined position of the vehicle door.
Further, for example, the first unlocking lever 91 is attached to a seat belt device (not shown) and is provided to operate in response to the removal of the seat belt, and the second unlocking lever 94 is a predetermined position for the vehicle door. And may be provided so as to operate corresponding to the opening / closing operation of the door.

In the above embodiment, as shown in FIG. 2, the fixed side portion 1 cb is provided between the movable side portion 1 ca of the cushion side portion 1 c and the belt portion of the seat belt 4. It can be changed without being done.
For example, an empty space may be provided instead of the fixed side portion 1cb, and it is not always necessary to be a fixed side portion, and a side portion having a smaller movement amount than the movable side portion 1ca may be provided instead. good.

In the above embodiment, as shown in FIG. 2, the fixed side portion 1 cb is provided between the movable side portion 1 ca of the cushion side portion 1 c and the belt portion of the seat belt 4 so as not to contact each other. It is possible to change without limitation.
For example, the fixed side portion 1cb is eliminated, and the movable side portion 1ca and the belt portion are arranged so as to be in contact with each other at the normal position, and the movable side portion 1ca is once separated from the belt portion when moving to the getting-off assist position. After moving to a position, you may devise so that it may move to alighting assistance position after that.

In the said embodiment, as shown in FIG. 1, the lower end part (fixed part) of the belt part of the seatbelt 4 is provided in the boundary part between the cushion side part 1c and the back side part 2c, or its peripheral part. However, it can be changed without any particular limitation.
For example, the lower end portion (fixed portion) of the belt portion may be attached so as to enter a through hole formed at a predetermined position of the back side portion 2c. That is, the anchor point of the belt portion may be provided at a predetermined position (for example, the center portion or the lower portion in the vertical direction) of the back side portion 2c.

  In the said embodiment, as shown in FIG. 11, although the side support apparatus 70 consists of a manual type, it is not specifically limited, A stepless electric type may be sufficient.

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

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

DESCRIPTION OF SYMBOLS S Vehicle seat 1 Seat cushion 1a, 2a, 3a Cushion material 1aa Back engagement protrusion 1ab Front engagement protrusion 1b, 2b, 3b Skin material 1c Cushion side part 1ca Movable side part 1cb Fixed side part (belt movement regulation part)
1cc, 1cd Side groove 1d Cushion center part 2 Seat back 2c Back side part 2ca Side protrusion (belt movement restricting part)
3 Headrest 4 Seat belt 10 Cushion frame 11 Side frame 12 Front frame 13 Rear frame 14 Support frame 14a Front support frame portion 14aa Mounting hole 14b Side support frame portion 14c Central support frame portion 15 Mounting bracket 15a Mounting hole 16 Link 16a Upper link 16b Lower link 16c Link rotation shaft 20 Back frame 21 Upper frame 21a Side frame portion 21b Upper frame portion 21c Connection frame portion 22 Lower frame 22a Side frame portion 22b Lower frame portion 23 Central frame 24 Back rotation shaft 25 Mounting wires 30, 30a, 30b 30c Slide rail device 31 Lower rail 32 Upper rail 33 Drive motor 40 Slide bar device 41 Mounting bracket Socket 42 slide bar 43 mounting bracket 44 slide cylinder 50 belt-assisting device 51 mounting plate 51a housing opening 52 holding plate 53 supporting plate 54 pivot shaft 55 movable member 55a projecting portions (belt movement restricting portion)
56 Auxiliary spring 70 Side support device 71 Side plate 71a Through hole 71b Side wall portion 72 Side bracket 72a Upper wall portion 72b Side wall portion 73 Rotating shaft 74 Side base 74a Bottom wall portion 74b Side wall portion 75 Second side base 76 Attachment wire 80 Lock device 81 Lock lever 81a Engagement protrusion 81b Holding part 81c Through protrusion 82 Support shaft 83 Locked lever 83a Engagement groove 84 Fixing bolt 90 Unlocking device 91 First unlocking lever (first unlocking member)
91a 1st extension part 91b 2nd extension part 92,95 Rotary shaft 93 1st transmission cable 93a, 96a Cable attachment edge part 94 2nd lock release lever (2nd lock release member)
96 Second transmission cable 100 First transmission lever 100a Mounting hole 100b Through hole 101 First connecting shaft 110 Second transmission lever 110a Mounting hole 110b Through hole 111 Second connecting shaft 112 Pressing lever 112a Through protrusion 112b Pressing part 113 Connecting pin 120 Relay lever 120a Fitting protrusion 120b Press receiving portion 120c Holding portion

Claims (10)

A seat cushion and a seat back for a passenger to sit on;
In the seat cushion, at least a part of the side portion in the seat width direction can be switched between a normal position where the occupant can be seated and an auxiliary position for assisting the occupant's riding or getting-off operation. A vehicle seat including a side support device for supporting the vehicle,
The side support device is disposed at a position in front of a part of a seat belt placed in front of a side portion of the seat back in the seat width direction,
At least one of the seat cushion and the seat back is provided with a belt movement restricting portion for restricting movement of a part of the seat belt when the position of the side portion is switched by the side support device. A vehicle seat characterized by   The belt movement restricting portion restricts at least a part of the side portion and a part of the seat belt from contacting each other when the position of the side portion is switched. The vehicle seat described.   The vehicle seat according to claim 1, wherein the belt movement restricting portion restricts at least a part of the side part and a part of the seat belt so as not to always contact each other. The side portion is
A first side portion supported so as to be switchable by the side support device;
A second side portion provided between the first side portion and a portion of the seat belt,
The vehicle seat according to any one of claims 1 to 3, wherein the second side portion constitutes at least a part of the belt movement restricting portion. The first side portion is a movable side portion movable between the normal position and the boarding / alighting assistance position,
The vehicle seat according to claim 4, wherein the second side portion is a fixed side portion fixed at the normal position. A belt assist device capable of moving at least a part of the seat belt to a position that can be easily reached from the seated occupant;
The belt movement restricting portion restricts at least a part of the side portion and a part of the seat belt moved to a position where the belt assist device is easy to reach when the belt assist device is operating. The vehicle seat according to any one of claims 1 to 5, wherein the vehicle seat is provided. A belt assist device capable of moving at least a part of the seat belt to a position that can be easily reached from the seated occupant;
A control device for controlling the operation of the belt assist device and the side support device,
When the belt assist device is operating, the control device controls the operation of the side support device so as not to move at least a part of the side part, or a movement amount of at least a part of the side part. The vehicle seat according to any one of claims 1 to 6, wherein the vehicle seat is limited. The side support device includes a side plate that moves between the normal position and the boarding / alighting assist position while supporting at least a part of the side portion, a lock device that locks the side plate in the normal position, and the lock device. An unlocking device for releasing the locked state of
The unlocking device is disposed on the side portion of the seat cushion in the seat width direction, and has an unlocking member that operates to release the locked state,
The unlocking member moves from a locked position for maintaining the locked state to a unlocked position for releasing the locked state by applying a predetermined load to the seating surface of the side portion. The vehicle seat according to any one of claims 1 to 7. The unlocking member is a first unlocking member,
The unlocking device further includes a second unlocking member that operates to release the locked state,
The first unlocking member is disposed in a central portion of the seat cushion;
The vehicle seat according to claim 8, wherein the second lock release member is disposed on the side portion of the seat cushion. The unlocking device is:
In a state where the first unlocking member is located at the unlocking position,
The vehicle seat according to claim 9, wherein the locked state is released when the second unlocking member moves from the locked position to the unlocked position.

Images