JP4496414B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat that is suitable mainly as a seat for a welfare vehicle, which allows an elderly person or a disabled person (hereinafter simply referred to as a seated person) to easily get on and off the vehicle.

Conventionally, a technique related to this type of vehicle seat is disclosed, for example, in Patent Document 1 below. As shown in FIG. 11, the conventional vehicle seat 100 includes a seat body 110 and a front / rear slide mechanism 120 that moves the seat body 110 in the vehicle front-rear direction with respect to the vehicle floor F. On the slide base 121 of the front / rear slide mechanism 120, the seat main body 110 is rotated about 90 ° horizontally between a vehicle-front-facing boarding position (position shown in FIG. 11) and a lateral position facing the door opening D side. A mechanism 130 is installed.
Further, between the rotating mechanism 130 and the seat main body 110 and on the rotary base 135, the seat main body 110 in a lateral position is advanced to the outside of the passenger compartment through the door opening D, or retracted to the inner side of the passenger compartment. A first slide mechanism 140 to be moved, and a lifting mechanism 150 to lower and raise the sheet main body 110 as the sheet main body 110 is moved forward and backward by the first slide mechanism 140 are mounted. Further, a second slide mechanism 160 that horizontally moves the seat body 110 independently of the first slide mechanism 140 is installed on the lift base 155 that is lifted and lowered by the lift mechanism 150.
The front / rear slide mechanism 120 and the first slide mechanism 140 are mainly composed of a screw shaft mechanism including a screw shaft having a so-called trapezoidal screw and a nut meshing with the screw shaft, and the screw shaft is rotated around the screw shaft mechanism by a drive motor. By moving the nut in the screw shaft direction, the seat body 110 can be moved forward and backward with respect to the vehicle floor F, and the interior and exterior of the vehicle can be moved forward and backward with respect to the rotating base 135. This screw shaft mechanism has a position holding function for holding the sheet main body 110 so as not to move unless the screw shaft is positively rotated by a drive motor.
Thus, in this type of vehicle seat 100, the seat belt is different from an ordinary seat (a seat fixed in the front direction of the vehicle) because the seat body 110 needs to be rotated or moved between the vehicle interior and the exterior. It is equipped on the main body 110 side. In FIG. 11, the seat belt itself is not shown, and only the buckle B is shown. The buckle B is attached to the left side portion of the seat body 110.
Thus, when the seat belt is not supported on the vehicle body side, for example, a large seat belt load W applied to the seat belt through a seated person at the time of a vehicle front collision or the like is directly applied to the seat body 110. A part of the mechanism is received by the position holding force of the driving device in each mechanism (for example, the position holding function of the screw shaft mechanism), but this is insufficient. This type of seat 100 is equipped with a belt load transmission mechanism R in addition to the rotation mechanism and the like.

The conventional belt load transmission mechanism R disclosed in Patent Document 1 includes a first load transmission member 190 provided at the rear portion of the seat body 110, a second load transmission member 180 provided on the rotation base 135, and a vehicle floor F. The third load transmission member 185 provided in the is provided.
The first load transmission member 190 opens the gap L with respect to the engaging portion 181 provided at the upper part of the second load transmission member 180 in the process in which the seat body 110 is returned to the retracted position by the second slide mechanism 160 from the front. It will be inserted. For this reason, depending on the operation of the second slide mechanism 160 due to the positive rotation of the screw shaft, the first load transmission member 190 is not engaged with the engagement portion 181, and accordingly, the sheet body 110 is moved horizontally by the second slide mechanism 160. It is located in a state where the operation is not hindered (during normal operation).
In addition, a hooking portion 182 bent in an L shape is provided at the lower portion of the second load transmission member 180. On the other hand, a third load transmission member 185 is fixed on the vehicle floor F along the vehicle front-rear direction. On the upper portion of the third load transmitting member 185, a floor engaging portion 185a bent in an L shape is provided. When the seat body 110 is returned to the position facing the front of the vehicle, the hooking portion 182 of the second load transmitting member 180 enters the lower side of the floor engaging portion 185a of the third load transmitting member 185 with a certain gap. It will be in the state. When a large seat belt load is not applied to the seat body 110 when the seat body 110 is facing the front of the vehicle, the hooking portion 182 and the floor engaging portion 185a of the third load transmission member 185 are spaced apart from each other. Maintains no interference. Therefore, a sliding operation of the seat body 110 in the vehicle longitudinal direction by the operation of the front / rear slide mechanism 120 and a rotation operation of the seat body 110 toward the door opening D by the operation of the rotation mechanism 130 are allowed.

According to this belt load transmission mechanism R, for example, when a large seat belt load W is applied to the seat main body 110 obliquely forward and upward (in the direction indicated by the white arrow in FIG. 11), for example, in the case of a vehicle front collision. The seat body 110 is slightly displaced obliquely upward within a cumulative range of backlash and elastic deformation of each mechanism, and the first load transmission member 190 is engaged with the engagement portion 181 and the second load transmission is performed. The hooking portion 182 of the member 180 is engaged with the floor engaging portion 185a of the third load transmitting member 185 from below, whereby the seat body 110 is engaged with the vehicle floor F, and the seat belt load W However, it bypasses each mechanism and is received directly and firmly on the vehicle floor F side.
As described above, the normal rotation operation and the elevation when the vehicle gets on and off between the first load transmission member 190 and the second load transmission member 180 and between the second load transmission member 180 and the third load transmission member 185. The seat body 110 is not engaged in the operation (normal operation by the driving device of each mechanism), and a shocking seat belt load W is applied to the seat body 110 due to a vehicle front collision or the like. Engaged when accumulated by deflection (elastic deformation) or the like and displaced by a gap L in a direction different from the normal operation (for example, obliquely upward in the forward direction), thereby engaging between the seat body 110 and the vehicle floor F. The seat belt load W is directly received on the vehicle floor F side. According to this belt load transmission mechanism R, a seated person or the like can ensure a smooth operation of the seat body 110 during normal operation without any special operation, and the belt load transmission mechanism R can be used during a vehicle front collision or the like. When operated, a large seat belt load W can be directly received on the vehicle floor F side instead of each mechanism.
JP-A-2005-14672

However, it is necessary to further improve the conventional belt load transmission mechanism R described above. That is, in the above conventional belt load transmission mechanism R, the first load transmission member 190 is moved horizontally with respect to the engaging portion 181 of the second load transmission member 180 by utilizing the backward movement of the seat body 110, so When the vehicle is in normal use, such as when the vehicle is running, a slight gap L is left between them (the positional relationship that does not interfere with the horizontal movement of the seat body 110) so that the seat can be operated without any special operation. While normal operation of the main body 110 is allowed, when a large seat belt load W is applied to the seat main body 110, the seat main body 110 is in a direction different from the normal operation (for example, upward or obliquely upward in front) by the gap L. The first load transmission member 190 is engaged with the engaging portion 181 from below for the first time when it is displaced, and the seat body 110 is engaged with the vehicle floor F side. It had become.
As described above, when the seat belt load W is applied, the seat body 110 is slightly displaced in a direction different from that during normal operation, whereby the first load transmission member 190 is engaged with the second load transmission member 181 and the seat belt is engaged. Since a part of the load is transmitted to the vehicle floor F side, the first load transmitting member 190 is used when the seat body 110 moves horizontally forward (in the same direction as the normal operation) due to the seat belt load W. Is not engaged with the second load transmission member 181, and as a result, the belt load transmission mechanism R may not function sufficiently.
The present invention has been made in view of this problem, and even when the seat main body horizontally moves forward as well as obliquely upward in the forward direction when a seat belt load is applied, without impairing the operability during conventional normal operation. It is an object to ensure that the belt load transmission mechanism functions.

For this reason, the present invention provides a vehicle seat having the structure described in each claim.
According to the vehicle seat of the first aspect, the first load transmission member is regulated when the seat body is returned to the vehicle interior and reaches the slide retracted end positions of the first and second slide mechanisms. The upper engagement portion is moved to the position so that the upper engagement portion can be engaged with the first engagement portion of the second load transmitting member from below, and the horizontal engagement portion protrudes rearward in the sliding direction. State. Therefore, the seat body and the second load transmission member can be engaged with each other in the seat belt load application direction (the direction in which the seat body is displaced upward and forward, the same applies hereinafter), and the second load transmission A state in which the second engagement portion of the member is opposed to the lower side with respect to the floor engagement portion of the third load transmission member so that the second load transmission member can be engaged with the vehicle floor in the seat belt load application direction. As a result, the seat body can be engaged with the vehicle floor with respect to the acting direction of the seat belt load including the horizontal direction.
Thus, in a state where the seat body is returned to the slide retracted end position of the first and second slide mechanisms, the upper engagement portion of the first load transmission member is in relation to the first engagement portion of the second load transmission member. And the horizontal engagement portion protrudes rearward in the sliding direction with respect to the first engagement portion of the second load transmission member, so that when a seat belt load is applied, The horizontal engagement portion of the first load transmission member is securely engaged with the first engagement portion of the second load transmission member not only when the seat body moves horizontally but also forward and obliquely upward. As a result, the belt load transmission mechanism can function reliably and a part of the seat belt load can be directly received by the vehicle floor.
In addition, when the seat body moves forward by a certain distance from the restricted state and reaches a position corresponding to the restriction release region, the restriction release mechanism is activated and the first load transmission member becomes the second load transmission member. On the other hand, the sheet moves to the restriction release position where it does not engage, whereby the forward horizontal movement of the seat body by the second slide mechanism is allowed. For this reason, during normal operation, a seated person or the like can easily get on and off the vehicle by moving the seat body to the outside of the passenger compartment without performing a special operation for releasing the restriction state. Good operability is not hindered.

According to the vehicle seat of the second aspect, in a state where the seat body is located at the boarding position facing the front of the vehicle, the first load transmitting member moves to the restricting position and the upper engaging portion is attached to the biasing member. A state in which the first engagement portion of the second load transmission member is held at a position where it can be engaged or engaged from the lower side by the force, and the horizontal engagement portion protrudes behind the first engagement portion. Thus, the seat body can be engaged with the vehicle floor in the direction of the belt load acting (upward, obliquely upward and forward).
At the stage of the dismounting mode in which the seat body is moved from the boarding position to the outside of the passenger compartment (a series of operations for moving the seat body outside the passenger compartment), in the state where the seat body is directed to the door opening side by the rotation mechanism, When the seat body moves forward from the slide retracted position relative to the rotation base to a position corresponding to the restriction release region of the first slide mechanism, the operating lever is moved to the restriction release operating position by the lever guide member, and this is the first load by the operation transmitting member. The first load transmission member is transmitted to the transmission member and moves to the restriction release position against the biasing member. As a result, a restriction release state in which the forward movement of the seat body by the second slide mechanism is allowed is obtained.
Thus, according to the restriction release mechanism, in the dismounting mode, the forward movement of the seat body toward the outside of the passenger compartment by the first slide mechanism (movement operation from the retracted end position of the slide range to the position corresponding to the restriction release region). Since the first load transmission member is automatically moved to the restriction release position based on this, the seat body moves the seat body out of the passenger compartment without performing a special operation for releasing the restriction state. You can easily get on and off.
For example, after the regulation is released, the first slide mechanism is temporarily stopped, and the second slide mechanism is operated to advance the seat body horizontally toward the outside of the passenger compartment. it can. When the seat main body moves to the slide forward end position by the second slide mechanism, the first slide mechanism is actuated again forward to further move the seat main body to the outside of the passenger compartment and descend to a height close to the road surface. Can be moved to a position.

Conversely, at the stage of the riding mode in which the seat body is returned to the vehicle interior side (a series of operations for returning the seat body to the vehicle interior), for example, the first slide of the elevating mechanism remains at the slide forward end position for the second slide mechanism. It is possible to adopt a configuration in which the mechanism is operated backward and the seat body is raised to the vehicle interior height and returned to the indoor side. In this case, the seat main body can be configured to return without stopping in the middle (position corresponding to the restriction release region) to the slide retracted end position of the first slide mechanism. As a result, the second load transmitting member is returned to the moving end on the vehicle interior side.
Thereafter, the second slide mechanism is operated backward, and the seat body is returned horizontally to the vehicle interior side. Before the seat main body reaches the slide retracted end position by the second slide mechanism, the operating lever is moved to the restricting operating position by the lever guide member, which is transmitted to the first load transmitting member by the operation transmitting member, and the first load transmitting is performed. The member moves to the restriction position by the biasing force of the biasing member. For this reason, the seat body is then retracted by the second slide mechanism, so that the horizontal engagement portion of the first load transmission member comes into contact with the first engagement portion of the second load transmission member from the front side in the sliding direction. Here, a guide inclined surface is provided in the horizontal engagement portion, and the first load transmission member is once against the urging force of the urging member by the sliding contact action of the guide inclined surface with respect to the first engagement portion. Can be retracted to the side. For this reason, the first load transmitting member is moved to the slide retracted end while the horizontal engaging portion of the first load transmitting member is in contact with the first engaging portion of the second load transmitting member. The horizontal engagement portion temporarily retracts to the restriction release position against the urging member, and the horizontal engagement portion passes below the first engagement portion. After the passage, the first load transmitting member is returned to the restriction position by the urging member. The upper engaging portion of the lever can be engaged with the first engaging portion from below. Therefore, when the seat body moves toward the passenger compartment in the riding mode, the first load transmission member comes into contact with the first engagement portion of the second load transmission member from the front side, but the seat body by the second slide mechanism. The first load transmission member can be temporarily retracted to the restriction release position against the urging member by the backward movement operation, and the seated person can perform any special operation by adopting such a configuration. Instead, the first load transmission member can be returned to a state in which it can engage with the first engagement portion of the second load transmission member in the seat belt load acting direction.

Next, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a vehicle M provided with a vehicle seat S described below as a passenger seat on the left side of the front row of the vehicle. The vehicle seat S has a vehicle front-facing riding position (position indicated by a solid line in the figure) with the seat body 10 facing the front of the vehicle and a lateral position (indicated by a two-dot chain line in the figure) directed toward the door opening D. The vehicle interior height and the height closer to the road surface while being moved between the vehicle interior and exterior through the door opening D at a laterally directed position toward the door opening D. It has a function to move up and down between the boarding and alighting assistance positions.
Details of the vehicle seat S are shown in FIG. The vehicle seat S includes a seat body 10, a front / rear slide mechanism 20 that slides the seat body 10 in the longitudinal direction of the vehicle, and a seating position of the seat body 10 facing the front of the vehicle and a lateral position facing the door opening D side. Rotating mechanism 30 that rotates horizontally in the range of about 90 ° between, elevating mechanism 50 that moves down to the height close to the road surface while moving to the outside of the passenger compartment through seat body 10 door opening D, and elevating mechanism 50 are independent of each other. Thus, a second slide mechanism 70 that horizontally moves the seat body 10 is provided.
The seat body 10 includes a seat cushion 11 and a seat back 12. The seat body 10 is movable in a certain range in the vehicle front-rear direction (a direction orthogonal to the paper surface in FIG. 2) by a front-rear slide mechanism 20 installed on the vehicle floor F. The front / rear slide mechanism 20 is installed on a unit base 23 fixed to the vehicle floor F.
The front / rear slide mechanism 20 is supported on a unit base 23 so as to be movable in the vehicle front-rear direction via the slide rails 22, 22 fixed parallel to each other along the vehicle front-rear direction. A front / rear slide base 21 and a drive mechanism 24 interposed between the front / rear slide base 21 and the unit base 23 are provided. The drive mechanism 24 includes a front / rear slide motor 24a, a screw shaft 24b that rotates about the shaft thereby, and a nut 24c engaged therewith. The front / rear slide motor 24 a is installed on the unit base 23, the screw shaft 24 b is supported on the unit base 23 so as to be rotatable around the shaft, and the nut 24 c is fixed to the lower surface of the front / rear slide base 21. For this reason, when the front / rear slide motor 24a is activated, the screw shaft 24b rotates around the shaft, whereby the nut 24c moves along the screw shaft 24b, so that the front / rear slide base 21 is horizontal in a certain range in the vehicle front-rear direction. Moving.

A rotation mechanism 30 is installed on the front / rear slide base 21. The rotating mechanism 30 includes a rotating base 35, a rotating disk 31 interposed between the rotating base 35 and the front / rear slide base 21, and a rotation motor 32 as a drive source installed on the front / rear slide base 21. ing. The turntable 31 has an inner ring 31a and an outer ring 31b that are concentrically rotated with each other. An inner ring 31a is fixed to the upper surface of the front / rear slide base 21, and a rotating base 35 is fixed to the upper surface of the outer ring 31b. A fan-shaped gear portion (sector gear) is provided on the outer periphery of the outer ring 31b, and a rotating gear 32a attached to the output shaft of the rotating motor 32 is engaged with the gear portion. For this reason, when the rotation motor 32 is activated, the outer ring 31b is rotated, whereby the rotation base 35 and the seat body 10 are approximately 90 ° between the boarding position facing the front of the vehicle and the lateral position facing the door opening D. Rotate horizontally over the range.
An elevating mechanism 50 is installed on the rotation base 35. The elevating mechanism 50 is supported by the first slide mechanism 40, the elevating support base 44 that moves in the horizontal direction, and the left and right sides of the elevating support base 44 so that the tilt base end side can be tilted up and down. A pair of left and right outer lifting arms 51, 51 and inner lifting arms 52, 52, a lifting base 55 supported between tilting tips of these lifting arms 51, 51, 52, 52, and these lifting arms 51, 51, 52 , 52 is received from below and supported by a tilting support member 53.
The first slide mechanism 40 includes a pair of left and right linear guide mechanisms 42, 42, a first slide motor 45a, a drive shaft having a trapezoidal screw shaft 45b and a nut 45c meshed with the screw shaft 45b. A mechanism 45 is provided. The first slide motor 45a is installed on the rotation base 35, the screw shaft 45b is supported on the rotation base 35 so as to be rotatable about the axis, and the nut 45c is fixed to the lifting support base 44 side. For this reason, when the first slide motor 45a is activated, the screw shaft 45b rotates around the shaft, whereby the nut 45c moves along the screw shaft 45b, and the elevating support base 44 moves horizontally on the rotation base 35.

A pair of left and right four-joint parallel link mechanisms are configured by the lift support base 44, the lift base 55, and the pair of left and right outer and inner lift arms 51 and 52 that couple the bases 44 and 55 together. The tilt support member 53 is provided in a pair of left and right at the outdoor side end portion of the rotation base 35. An outer elevating arm 51 is placed on each of the tilting support members 53 and 53.
For this reason, when the lifting support base 44 moves on the rotation base 35 from the vehicle interior side to the vehicle exterior side by the operation of the first slide mechanism 40, the distance between the tilt support member 53 and the lift support base 44 gradually decreases. . A restriction release region is set in the middle of the entire slide range of the lifting support base 44 by the first slide mechanism 40. The left and right elevating arms 51, 51, 52, 52 do not tilt between the slide retreat end position of the entire slide range and the restriction release region, and the lower portion thereof and the tilt support member 53 so as to move horizontally. The positional relationship is set appropriately. For this reason, the seat main body 10 moves only in the horizontal direction by the sliding operation between the slide backward end position of the first slide mechanism 40 and the restriction release region, and the height direction is a constant height (in this case, the vehicle interior height). ). According to this, as will be described later, when the first load transmission member 90 moves to the restriction release position with respect to the second load transmission member 95 in the dismounting mode, the seat body 10 moves only in the horizontal direction to the outside of the passenger compartment. However, it is not displaced in the height direction.
The restriction release region in the entire slide range of the lifting support base 44 by the first slide mechanism 40 is appropriate in consideration of the time and distance necessary for moving the first load transmitting member 90 from the restriction position to the restriction release position. Is set to
In the forward movement operation of the lifting support base 44 by the first slide mechanism 40, the left and right lifting arms 51, 51, 52, 52 extend their tip side up and down from the slide retracted end position to the restriction release region. After advancing horizontally without being displaced, the front end side is tilted downward (downward), whereby the seat body 10 is lowered to the boarding / alighting assist position close to the road surface.
On the contrary, when the lifting support base 44 moves from the vehicle interior side to the vehicle interior side, the distance between the lift support base 44 and the tilting support member 53 gradually increases, so that the lifting arms 51, 51, 52, 52 are at their tips. The lift base 55 is moved parallel to the upper side while moving to the vehicle interior side by tilting in the direction in which the side is displaced upward. The left and right lifting arms 51, 51, 52, 52 are tilted upward until the lifting support base 44 reaches the restriction release region from the forward end position of the entire slide range, and thereafter until the slide backward end position is reached. Since the elevating arms 51, 51, 52, 52 move horizontally without displacing their distal ends in the vertical direction, the elevating base 55 moves horizontally at a constant height.
The seat body 10 is supported on the lift base 55 via the second slide mechanism 70 so as to be slidable in the horizontal direction.
As described above, the seat body 10 includes the seat cushion 11 as a seat surface, the seat back 12 as a backrest, and the seat holder 75 that supports the seat cushion 11 from the lower surface side.
The second slide mechanism 70 includes a pair of left and right linear guide mechanisms 74 and 74 and a drive mechanism 76. The linear motion guide mechanism 74 includes a linear motion rail 74 a and a slide block 74 b movably combined therewith. The linear motion rail 74 a is fixed to the lower surface of the seat holder 75, and the slide block 74 b is the lift base 55. It is fixed on the top surface.
The drive mechanism 76 includes a second slide motor 71 attached on the lifting base 55, a pinion gear 72 attached to the output shaft of the second slide motor 71, and a rack 73 in which the pinion gear 72 is engaged. The rack 73 is attached along the lower surface of the sheet holder 75. The rack 73 is fixed with its longitudinal direction along the front-rear direction of the seat body 10. The rack 73 is fixed in parallel with the linear motion rails 74 a and 74 a of the left and right linear motion guide mechanisms 74 and 74.
When the second slide motor 71 is activated, the pinion gear 72 is rotated, and the rack 73 engaged with the pinion gear 72 is moved with respect to the lifting base 55, and thus the seat body 10 is translated in the front-rear direction.

The vehicle seat S having the above configuration operates as follows and can easily get on and off the vehicle M. When the seat main body 10 is moved from the passenger compartment to the outside of the passenger compartment (alighting mode), the boarding position shown in FIG. 2 (the seat main body 10 is positioned at the retracted end position of the sliding range with respect to the rotation base 35 and the front of the vehicle) The seat body 10 is horizontally rotated about 90 ° toward the door opening D side while moving forward of the vehicle by the operation of the front / rear slide mechanism 20 and the rotation mechanism 30. FIG. 3 shows a state in which the seat body 10 is directed to the door opening D side (lateral position).
Next, as shown in FIG. 4, the first slide mechanism 40 once corresponds to the restriction release region from the slide retracted end position at the lateral position where the seat body 10 is directed toward the door opening D, as will be described later. The belt load transmission mechanism R operates to reach the restriction release side until the position is reached (the first load transmission member 90 is moved to the restriction release position with respect to the first engagement portion 95a of the second load transmission member 95). After that, the second slide motor 71 of the second slide mechanism 70 is activated toward the dismounting side. When the second slide motor 71 is activated on the getting-off side, the pinion gear 72 is rotated and the rack 73 is moved to the outside of the passenger compartment, whereby the seat body 10 is outside the passenger compartment with respect to the lift base 55 (door opening D side). Moved horizontally.
Thereafter, as shown in FIG. 5, in the elevating mechanism 50, the first slide mechanism 40 is moved again from the restriction release region to the dismounting side, and the elevating support base 44 is located on the rotation base 35 on the outer side of the passenger compartment (left side in FIG. 5). Move to. As the elevating support base 44 moves to the outside of the passenger compartment, the left and right outer elevating arms 51, 51 and the inner elevating arms 52, 52 are tilted in a direction to displace the tip side downward while moving to the outside of the passenger compartment. As a result, the elevating base 55 moves to the outside of the passenger compartment and descends to a height close to the road surface to reach the boarding / alighting assist position. Thus, the elevating base 55 is lowered while moving to the outside of the passenger compartment, whereby the seat body 10 is translated in parallel to the outside of the passenger compartment while maintaining its seating posture. When the seat body 10 descends to the outside of the passenger compartment and is taken out to the boarding / alighting assist position, the seated person can easily perform a transfer operation between the seat body 10 and, for example, the wheelchair outside the passenger compartment.
When a seated person sits on the seat body 10 taken out of the passenger compartment, and when the seat body 10 that has risen from the seat body 10 and is vacant is returned to the passenger compartment (riding mode), each mechanism is Operate in reverse order. That is, in the state shown in FIG. 5, first, the first slide mechanism 40 is moved to the boarding mode side and the lifting support base 44 is moved to the vehicle interior side, whereby the left and right outer lifting arms 51 and 51 and the inner lifting arm 52 are moved. , 52 are returned to the vehicle interior side while being tilted upward, the elevating base 55 and the seat body 10 are moved upward while maintaining the seating posture.
Here, in the boarding mode, unlike the dismounting mode, the elevating support base 44 passes as it is without stopping in the restriction release region and is returned to the slide backward end position of the first slide mechanism 40. Thereby, after the seat body 10 is returned to the height shown in FIG. 4, the second slide mechanism 70 is operated to the riding mode side, and the seat body 10 is horizontally moved to the vehicle interior side. As shown in FIG. 3, after the seat main body 10 is returned to the slide retracted end position of the second slide mechanism 70, the front / rear slide mechanism 20 and the rotation mechanism 30 operate toward the boarding mode, and the seat main body 10 moves backward while the seat main body 10 moves backward. It is rotated horizontally to the front facing position. When the seat body 10 is thus returned to the boarding position facing the front of the vehicle, the seating of the seated person is completed, or the returning operation of the seat body 10 that has become empty is completed.

Next, the vehicle seat S of the present embodiment having the above-described boarding mode and getting-off mode as a basic operation is partially strengthened on the vehicle floor F side when a large seat belt load W is applied to the seat body 10. A belt load transmission mechanism R is provided for receiving. The vehicle seat S according to the present embodiment has an unprecedented feature regarding the belt load transmission mechanism R. Details of the belt load transmission mechanism R are shown in FIGS.
The belt load transmission mechanism R according to this embodiment includes a first load transmission member 90, a second load transmission member 95, a third load transmission member 85, and a restriction release mechanism 60.
First, as shown in FIGS. 6 to 9, the first load transmission member 90 is supported via a support bracket 91 in the vicinity of the buckle B in the rear portion of the right side surface of the seat holder 75. The first load transmission member 90 is supported by the support bracket 91 via a support shaft 92 so as to be tiltable up and down. As will be described later, the first load transmitting member 90 reaches the restriction position with respect to the first engaging portion 95a of the second load transmitting member 95 by tilting upward, and the second load transmitting member 95 by tilting downward. To the restriction release position with respect to the first engagement portion 95a.
A spring hooking portion 90a is provided at a front portion (right portion in the drawing) of the first load transmitting member 90 so as to protrude forward. On the other hand, a spring hooking portion 91a is provided at the lower portion of the support bracket 91 so as to protrude forward. A spring 93 is interposed between the spring hooking portion 90 a of the first load transmitting member 90 and the spring hooking portion 91 a of the support bracket 91. The first load transmitting member 90 is urged by the spring 93 toward the restriction position side (clockwise direction in the drawing) around the support shaft 92. In this embodiment, a tension spring is used as the spring 93, which corresponds to an example of an urging member described in the claims.
A stopper portion 91b is provided in a state of protruding forward from the front portion of the support bracket 91 and above the spring hook portion 91a. When the spring hooking portion 90a is brought into contact with the stopper portion 91b from above, the tilting range of the first load transmitting member 90 in the engaging direction is restricted. When the spring hooking portion 90a comes into contact with the stopper portion 91b, the first load transmitting member 90 is held at a position (regulatory position) whose longitudinal direction is substantially horizontal.
The rear side of the first load transmission member 90 (the left part of the support shaft 92 in FIGS. 6 to 9) protrudes rearward and is provided with an upper engagement part 90e. A hook-shaped horizontal engaging portion 90b that is bent upward is formed at the tip of the upper engaging portion 90e. An engagement guide surface 90d is formed on the distal end side of the horizontal engagement portion 90b. A wire hooking portion 90 c is provided below the first load transmission member 90 and behind the support shaft 92. One end side of the motion transmission wire 94 is coupled to the wire hooking portion 90c. The motion transmission wire 94 corresponds to an example of a motion transmission member described in the claims. The other end side of the operation transmission wire 94 is coupled to a restriction release mechanism 60 described later.

Next, as shown in FIG. 2, the second load transmission member 95 is supported on the side of the elevating support base 44 of the elevating mechanism 50. A bracket 97 (not shown in FIG. 2) is attached to the outer surface of the lifting support base 44. As shown in FIGS. 7 and 8, the second load transmission member 95 is supported by the bracket 97 via a support shaft 96 so as to be able to tilt forward and backward (left and right in FIG. 7). Further, the tilting range of the second load transmitting member 95 is restricted to a certain angular range by a stopper (not shown). A torsion spring 98 is interposed between the second load transmission member 95 and the bracket 97 and around the support shaft 96. The torsion spring 98 biases the second load transmission member 95 toward the normal position shown in FIG. 7 (the counterclockwise direction in FIGS. 7 and 8, hereinafter referred to as “normal position” side).
A first engagement portion 95 a is provided on the upper portion of the second load transmission member 95. Under this first engagement portion 95a, the upper engagement portion 90e and the horizontal engagement portion 90b of the first load transmission member 90 can pass back and forth (in the left-right direction in FIGS. 7 and 8). As shown by the solid line in FIGS. 7 and 8, the position of the first engaging portion 95a is inclined so as to be inclined downward toward the rear side when the second load transmitting member 95 is in the normal position. Is set.
For this reason, in a state where the second load transmission member 95 is in the normal position, the first load transmission member 90 is retracted integrally with the seat body 10, and the engagement guide surface 90d is the lower surface side of the first engagement portion 95a. The first load transmission member 90 is once tilted downward against the spring 93 by the tilting action of the two, and the first load transmission member 90 is once against the torsion spring 98 to temporarily load the load (see FIG. 8, the upper engagement portion 90 e and the horizontal engagement portion 90 b of the first load transmission member 90 are allowed to enter the lower side of the first engagement portion 95 a. The When the upper engagement portion 90e and the horizontal engagement portion 90b of the first load transmission member 90 enter the lower side of the first engagement portion 95a, the first load transmission member 90 is returned to the restriction position side by the spring 93. The second load transmission member 95 is returned to the normal position by the torsion spring 98, whereby the upper engagement portion 90e of the first load transmission member 90 abuts against the first engagement portion 95a from below, The horizontal engaging portion 90b protrudes to the rear side of the first engaging portion 95a. As described above, the retracting operation of the first load transmitting member 90 relative to the second load transmitting member 95 is automatically performed in accordance with the retracting operation of the seat body 10 by the second slide mechanism 70, and the seated person or the like performs any operation. It has become acceptable.
On the other hand, below the second load transmission member 95, a second engagement engaged with the third load transmission member 85 when the second load transmission member 95 is tilted to the load transmission position or displaced upward. A joint portion 95c is provided. As shown in FIG. 2, in the present embodiment, the lower portion of the second load transmission member 95 is bent in an L shape toward the seat side, and a second engagement portion 95c is provided. On the other hand, the third load transmission member 85 is fixed to the vehicle floor F along the front-rear direction. A floor engaging portion 85a that is bent in an L-shaped cross section is provided on the upper portion of the third load transmitting member 85. The second engaging portion 95c of the second load transmitting member 95 enters below the floor engaging portion 85a.

A large number of engaging claws 85b to 85b are provided on the lower surface of the floor engaging portion 85a of the third load transmitting member 85 so as to protrude downward at regular intervals in the front-rear direction. Corresponding to the engaging claws 85b to 85b, the second engaging portion 95c of the second load transmitting member 95 is provided with two engaging holes 95d and 95d. Both the engagement holes 95d and 95d are provided at intervals and sizes that allow the two adjacent engagement claws 85b and 85b of the third load transmission member 85 to enter simultaneously.
The normal position of the second load transmitting member 95 by the torsion spring 98 is a position where the second engaging portion 95c is parallel to the floor engaging portion 85a of the third load transmitting member 85 with a slight gap therebetween. The position of the stopper is set so that For this reason, when the seat body 10 is located in the front of the vehicle and the second load transmission member 95 is located at the normal position, the seat body 10 is moved back and forth by the front / rear slide mechanism 20 and the seat body 10 is rotated by the rotation mechanism 30. Is allowed to rotate.
The length and attachment range of the third load transmission member 85 in the vehicle front-rear direction are such that the second engagement portion 95c enters below the floor engagement portion 85a for the entire slide range of the seat body 10 by the front-rear slide mechanism 20. It is set to become.
As shown by a solid line in FIG. 1, the seat body 10 is in the front-facing position of the vehicle, and the sliding end of the sliding range with respect to the rotating base 35 (the lifting support base 44 can be slid with respect to the rotating base 35 by the first slide mechanism 40 The seat body 10 is located at the retracted end position of the range and is positioned at the retracted end position of the range in which the seat body 10 is slidable with respect to the lifting base 55 by the second slide mechanism 70. 6 and 7, in the belt load transmission mechanism R, the upper engagement portion 90e of the first load transmission member 90 enters the lower side of the first engagement portion 95a of the second load transmission member 95. The spring 93 is in contact with the first engagement portion 95a of the second load transmission member 95 from below. Moreover, the horizontal engaging part 90b provided in the rear-end part of the 1st load transmission member 90 is the state which protruded in the back of the 1st engaging part 95a. Thus, the upward and forward movement of the seat body 10 with respect to the lifting support base 44 is restricted. This restricted state is released by the restriction releasing mechanism 60. The restriction release mechanism 60 operates in conjunction with the operation of the seat body 10. In the present embodiment, the movement of the seat main body 10 by the operation of the first slide mechanism 40 is used to act to release the restriction state.

Details of the restriction release mechanism 60 are shown in FIG. The restriction release mechanism 60 includes an operation lever 61 supported on the lower surface of the seat holder 75 via a bracket 64, the operation transmission wire 94, and a lever guide member 62 fixed on the rotation base 35. .
The actuating lever 61 is a lever bent in an approximately L shape as shown in the figure, and is supported by the bracket 64 via a support shaft 63 so as to be vertically rotatable near the center thereof. The other end side of the operation transmission wire 94 is coupled to the upper end portion of the operation lever 61 in the figure. One end side of the motion transmission wire 94 is coupled to the wire hooking portion 90c of the first load transmission member 90 as described above. Therefore, the operation of the operating lever 61 is transmitted to the first load transmitting member 90 via the operation transmitting wire 94.
A guide roller 61a is rotatably supported at the lower end of the operating lever 61 in the figure. The guide roller 61 a is rolled with respect to the lever guide member 62.
The lever guide member 62 includes a lock operation guide surface 62a that allows the operation lever 61 to move to the restriction operation position, a restriction release operation guide surface 62b that holds the operation lever 61 in the restriction release operation position, and a backward movement of the seat body 10. An inclined guide surface 62c for rotating the operation lever 61 from the restriction operation position to the restriction release operation position during operation is provided. A restriction operation guide surface 62a is provided at the rear upper surface of the lever guide member 62, an inclined guide surface 62c is provided at the front upper surface, and a restriction release operation guide surface 62b is continuously provided between the both guide surfaces 62a and 62c. Yes. The restriction release operation guide surface 62b is provided horizontally. The restriction operation guide surface 62a is provided in a state in which it is inclined in a downward direction from the rear end portion of the restriction release operation guide surface 62b. The inclined guide surface 62c is provided in a state in which it is inclined in a downward direction from the front end portion of the restriction release operation guide surface 62b.

Further, the actuating lever 61 is urged counterclockwise in FIG. 10 by the urging force of the spring 93 acting indirectly via the action transmission wire 94. Due to the indirect action of the spring 93, the guide roller 61a of the operating lever 61 is elastically pressed against the restriction operation guide surface 62a, the restriction release operation guide surface 62b or the inclined guide surface 62c of the lever guide member 62.
As shown in FIG. 6, in the state where the sheet body 10 is positioned at the retracted end position of the sliding range with respect to the rotation base 35, the guide roller 61 a of the operating lever 61 is slightly spaced from the restricting operation guide surface 62 a of the lever guide member 62. It is in a state of being located at a position apart from each other. In this state, since the motion transmission wire 94 is not pulled to the front side (right side in FIG. 6), the first load transmission member 90 is allowed to rotate to the restriction position side. The one load transmission member 90 is held in the restricted position by the biasing force of the spring 93.
The guide roller 61a of the actuating lever 61 is moved forward or backward with respect to the rotation base 35 by the first and second slide mechanisms 40, 70 of the sheet main body 10, or the regulation actuation guide surface 62a or the regulation release actuation guide surface 62b of the lever guide member 62 or inclined. It is rolled along the guide surface 62c.
In the dismounting mode, the seat body 10 is horizontally rotated from the position facing the front of the vehicle to the position laterally by the rotation mechanism 30, and then the seat body 10 is operated by the operation of the first slide mechanism 40 from the retracted end position of the slide range with respect to the rotation base 35. When starting to advance toward the door opening D, the operating lever 61 is displaced to the front side (right side in FIG. 10) with respect to the lever guide member 62, and as a result, the guide roller 61a comes into contact with the regulating operation guide surface 62a. It rises along the regulation operation guide surface 62a. For this reason, the operation lever 61 starts to rotate around the support shaft 63 toward the restriction release operation side (clockwise direction in FIG. 10). When the operation lever 61 starts to rotate toward the restriction release operation side, the operation transmission wire 94 is pulled forward, and the first load transmission member 90 resists the spring 93 to indicate the restriction release position (indicated by a two-dot chain line in FIG. 9). It starts to turn to the (position) side.

Thus, after the operation lever 61 is rotated to the regulation release operation side by the operation of the first slide mechanism 40 and the first load transmission member 90 is rotated to the regulation release position, the guide roller 61a is guided to lock the lever guide member 62. It rides on the unlocking operation guide surface 62b from the surface 62a. As a result, the operating lever 61 is most rotated to the regulation release operating side. This state is indicated by a two-dot chain line in FIG. In this state, the motion transmission wire 94 is pulled most forward, so that the first load transmission member 90 is most inclined in the counterclockwise direction against the spring 93 (two points in FIG. 9). (Position indicated by a chain line). In a state where the first load transmission member 90 has reached the restriction release position, the upper engagement portion 90e and the horizontal engagement portion 90b of the first load transmission member 90 are connected to the first engagement portion 95a of the second load transmission member 95. It will be in the state which can pass below to the front side. The slide position of the lifting support base 44 at this stage corresponds to the restriction release region. That is, when the lifting support base 44 moves forward with respect to the rotation base 35 by the operation of the first slide mechanism 40, the guide roller 61a rides on the unlocking operation guide surface 62b and moves the first load transmission member 90 to the restriction release position. A restriction release region is set in the middle of the entire slide range as the slide range of the elevating support base 44 corresponding to the state moved to.
When the lifting support base 44 reaches the restriction release position, the operation of the first slide mechanism 40 is temporarily stopped. As described above, depending on the operation of the first slide mechanism 40 during this period, the seat body 10 moves only in the horizontal direction and does not descend.
Thereafter, in place of the first slide mechanism 40, the second slide mechanism 70 is operated forward, whereby the seat body 10 starts to move forward with respect to the lifting mechanism 50 toward the outside of the passenger compartment. When the seat body 10 starts to move forward by the operation of the second slide mechanism 70, the first load transmission member 90 moves forward with respect to the second load transmission member 95 integrally therewith, and accordingly, below the first engagement portion 95a. The upper engagement portion 90e and the horizontal engagement portion 90b of the first load transmission member 90 pass through to the front side. Thereafter, when the seat body 10 further advances to the outside of the passenger compartment by the operation of the second slide mechanism 70, the first load transmission member 90 is largely separated forward from the second load transmission member 95 accordingly. . The seat body 10 moves to the forward end position of the slide range with respect to the lift base 55 by the operation of the second slide mechanism 70.
After the seat body 10 has moved to the forward end position of the slide range with respect to the lift base 55, the first slide mechanism 40 is again moved forward, and the lift support base 44 moves to the forward end position of the slide range with respect to the rotation base 35. As a result, as described above, the left and right outer lifting arms 51 and 51 and the inner lifting arms 52 and 52 tilt downward, whereby the seat body 10 further moves to the outside of the passenger compartment and descends to a height close to the road surface. It reaches the boarding / alighting assistance position. At this stage, the operating lever 61 is largely separated from the lever guide member 62 to the front side. For this reason, the first load transmission member 90 is returned to the restriction position by the biasing force of the spring 93, and the operation lever 61 is returned to the restriction operation position.
As described above, in the dismounting mode, the first slide mechanism 40 of the elevating mechanism 50 moves the seat body 10 forward to a position corresponding to the restriction release region advanced by a predetermined distance from the retreat end position of the slide range with respect to the rotation base 35. The restriction state of the first load transmission member 90 with respect to the second load transmission member 95 is automatically released. For this reason, the seated person can move the seat body 10 to the outside of the passenger compartment and get on and off the vehicle without performing a special operation for that purpose.

Conversely, in the boarding mode in which the seat body 10 is returned from the vehicle interior to the vehicle interior, the first slide mechanism 40 first returns the lift support base 44 to the retracted end position of the slide range with respect to the rotation base 35. As a result, the seat body 10 moves backward by a predetermined amount toward the passenger compartment while ascending integrally with the first load transmission member 90.
After the return operation to the vehicle interior side by the first slide mechanism 40 is completed, the second slide mechanism 70 is operated to the passenger side, whereby the seat body 10 is further retracted horizontally toward the vehicle interior side.
Before the seat body 10 reaches the retracted end position of the slide range with respect to the lifting base 55 by the second slide mechanism 70, the first engagement portion 95a of the second load transmission member 95 where the first load transmission member 90 is located at the normal position. Abut. However, as described above, the engagement guide surface 90d of the first load transmission member 90 abuts on the lower surface of the inclined first engagement portion 95a, and the first load transmission member 90 moves backward together with the seat body 10 as it is. As a result, the first load transmitting member 90 moves backward while tilting to the restriction release position side against the spring 93, thereby entering the lower side of the first engaging portion 95a. The lower part of the first engaging part 95a passes rearward.
When the seat body 10 reaches the retracted end position of the sliding range with respect to the lifting base 55, the first load transmitting member 90 is returned to the restricting position by the spring 93, and the upper engaging portion 90e thereof is in relation to the first engaging portion 95a. The horizontal engagement portion 90b comes into contact with the lower side and protrudes to the rear side of the first engagement portion 95a, and the load transmission mechanism R returns to the restricted state.
During the backward movement of the sheet main body 10 by the second slide mechanism 70, the operation lever 61 is temporarily released while the guide roller 61a of the operation lever 61 is rolled on the restriction release operation guide surface 62b of the lever guide member 62. The first load transmission member 90 is held at the operating position and held at the restriction release position against the spring 93. Thereafter, when the seat body 10 is further retracted, the guide roller 61a reaches the restriction operation guide surface 62a of the lever guide member 62, whereby the operation lever 61 is rotated to the restriction operation position side by the indirect action of the spring 93. 1 Load transmission member 90 is returned to the restriction position side. Thereafter, as described above, the upper engaging portion 90e of the first load transmitting member 90 contacts the lower surface of the first engaging portion 95a of the second load transmitting member 95. As described above, in the boarding mode, the regulation release mechanism 60 does not function unlike the getting-off mode. In this case, the first load transmission member 90 is temporarily moved to the regulation release position side by the backward movement of the seat body 10 as described above. It tilts and automatically enters the lower side of the first engaging portion 95a.

According to the belt load transmission mechanism R of the vehicle seat S according to the present embodiment configured as described above, the boarding mode is completed and the seat body 10 is held at the boarding position facing the front of the vehicle (such as when the vehicle is running). In this state, the first load transmission member 90 provided on the seat body 10 is always engaged with or engaged with the second load transmission member 95 provided on the lifting mechanism 50 in the seat belt load acting direction. Kept in a state. In addition, the first load transmitting member 90 includes a horizontal engaging portion 90b, and the horizontal engaging portion 90b protrudes to the rear side in the sliding direction of the first engaging portion 95a.
For this reason, for example, at the time of a vehicle front collision or the like, a large seat belt load W is applied to the seat body 10 via the buckle B, and as a result, the seat body 10 is turned in the front direction (forward obliquely upward, with a white arrow in FIG. 6). When a large external force (in the direction shown in the figure) is applied, the upper engaging portion 90e of the first load transmitting member 90 is engaged with the first engaging portion 95a of the second load transmitting member 95 from below, whereby the second load The transmission member 95 is tilted to the load transmission position against the torsion spring 98, and the second engagement portion 95c is engaged with the floor engagement portion 85a of the third load transmission member 85 from below. As a result, the seat A part of the belt load is transmitted to the vehicle floor F side. In addition, since the horizontal engagement portion 90b of the first load transmitting member 90 is protruded to the rear side of the first engagement portion 95a, the seat belt load horizontally moves the seat body 10 forward. Even when acting as an external force, the horizontal engagement portion 90b of the first load transmission member 90 is reliably engaged with the second load transmission member 95, so that a part of the seat belt load is reliably ensured. Received on the side.
In a state where the second engagement portion 95c of the second load transmission member 95 is engaged with the floor engagement portion 85a of the third load transmission member 85 from below, a number of engagements provided on the floor engagement portion 85a. At least one engaging claw portion 85b of the claws 85b to 85b is fitted into the lock hole 95d on the second load transmission member 95 side, which also ensures that the seat belt load W in the front horizontal direction is on the vehicle floor F side. Can be received.

Further, when the seat body 10 is in the boarding mode, the engagement guide surface 90d of the first load transmission member 90 abuts on the first engagement portion 95a of the second load transmission member 95, and the seat body 10 remains in this abutting state. The upper engaging portion 90e and the horizontal engaging portion 90b of the first load transmitting member 90 automatically enter the lower side of the first engaging portion 95a by the tilting action of both of them by retreating, and then the spring 93 To return to the restricted position. For this reason, the first load transmission member 90 can be moved to the restriction position with respect to the first engagement portion 95a of the second load transmission member 95 with a minimum sliding distance of the seat body 10. According to this, it is possible to minimize the free running distance (distance L shown in FIG. 7) of the horizontal engaging portion 90b with respect to the first engaging portion 95a when the seat belt load is applied. Can be transmitted to the vehicle floor F side in a shorter time.
Further, the illustrated belt load transmission mechanism R includes a restriction release mechanism 60 that operates on the restriction release side in conjunction with the forward movement of the seat body 10 by the first slide mechanism 40. For this reason, since the belt load transmission mechanism R is automatically released in the getting-off mode, the seated person or the like moves the seat body 10 to the outside of the passenger compartment without performing a special operation for releasing the regulation as in the conventional case. Can be moved. In the riding mode, the first load transmission member 90 automatically moves to a restriction position where the first load transmission member 90 can engage with the first engagement portion 95a of the second load transmission member 95 as the seat body 10 moves backward. Therefore, also in this case, a seated person or the like can easily get on the vehicle without performing a special operation for that purpose.

The embodiment described above can be implemented with various modifications. For example, although the tension spring 93 is illustrated as the biasing member that biases the first load transmitting member 90 toward the restriction position, other biasing members such as a compression spring or a damper may be used instead. .
Further, although the motion transmission wire 94 is illustrated as the motion transmission member, a transmission rod, a link arm, or the like can be used instead.
Further, the configuration in which the second load transmission member 95 is tiltable back and forth around the support shaft 96 is illustrated, but a configuration in which the second load transmission member 95 is fixed to the outer lifting arm 51 so as not to tilt is also possible.
Moreover, although the passenger seat was illustrated as a vehicle seat, it is applicable similarly to other vehicle seats, such as a driver's seat or a rear seat.

1 is a plan view of a vehicle equipped with a vehicle seat according to an embodiment of the present invention in a passenger seat. It is the figure which looked at the vehicle seat of this embodiment from the arrow (2) direction in FIG. 1, Comprising: It is the figure which looked at the vehicle seat from back. It is a figure which shows operation | movement of the vehicle seat of this embodiment. This figure is the figure seen from the vehicle back. This figure has shown the state by which the sheet | seat main body was orient | assigned to the door opening part side. It is a figure which shows operation | movement of the vehicle seat of this embodiment. This figure is the figure seen from the vehicle back. This figure shows a state in which the seat body directed to the door opening side is horizontally moved to the outside of the passenger compartment. It is a figure which shows operation | movement of the vehicle seat of this embodiment. This figure is the figure seen from the vehicle back. This figure has shown the state which descend | falled to the vehicle compartment outer side. It is the right view which looked at the vehicle seat of this embodiment from the arrow (6) direction in FIG. It is a right side rear part of the vehicle seat which concerns on this embodiment, Comprising: It is a side view of a belt load transmission mechanism. This figure shows a normal state where no seat belt load is applied to the seat body. It is a right side rear part of the vehicle seat which concerns on this embodiment, Comprising: It is a side view of a belt load transmission mechanism. This figure shows a state in which a seat belt load is applied to the seat body and the seat body and the vehicle floor are coupled. It is a side view of a belt load transmission mechanism, and is a figure showing the state where the 1st load transmission member moves between the regulation position shown with a solid line, and the regulation release position shown with a dashed-two dotted line with respect to the 2nd load transmission member. is there. It is a side view of a regulation release mechanism. It is a left view of the vehicle seat (driver's seat) provided with the conventional belt load transmission mechanism.

Explanation of symbols

S ... Vehicle seat B ... Seat belt buckle 10 ... Seat body 20 ... Front / rear slide mechanism 30 ... Rotating mechanism 40 ... First slide mechanism 44 ... Elevating support base 50 ... Elevating mechanism 51 ... Outer elevating arm 52 ... Inner elevating arm 55 Elevating base 60 ... Release release mechanism 61 ... Operating lever 61a ... Guide roller 62 ... Lever guide member 62a ... Lock operating guide surface 62b ... Unlock operating guide surface 62c ... Inclined guide surface 70 ... Second slide mechanism 75 ... Seat holder R ... belt load transmission mechanism 85 ... third load transmission member, 85a ... floor engagement portion, 85b ... engagement claw 90 ... first load transmission member 90a ... spring hook portion, 90b ... horizontal engagement portion, 90c ... Wire hook 90e ... Upper engagement part 93 ... Spring (biasing member)
94 ... motion transmission wire (motion transmission member)
95 ... second load transmission member, 95a ... first engagement portion, 95c ... second engagement portion, 95d ... engagement hole 98 ... torsion spring 100 ... conventional vehicle seat 110 ... seat body 180 ... second load transmission Member 181 ... engaging portion 182 ... hooking portion 185 ... third load transmission member 190 ... first load transmission member

Claims (2)

A rotating base located on the vehicle floor;
A rotating mechanism having a rotating disk that rotates the rotating base horizontally with respect to the vehicle floor;
An elevating support base disposed on the rotating base, a first slide mechanism in which the elevating support base is moved forward and backward with respect to the rotating base, and a restriction release region is set in the middle position of the forward and backward range; An elevating arm supported on an elevating support base so that one end side thereof can be tilted up and down, and provided on the rotating base, until the elevating support base reaches the restriction release region at the earliest from the slide retracted end position. After the other end side of the elevating arm is moved forward horizontally and then lowered, after the elevating support base is raised from the restriction release region to the slide retracted end position at the latest, the other end side of the elevating arm is raised An elevating mechanism having a tilting support member that supports the elevating arm so as to be horizontally retracted, and an elevating base supported on the other end side of the elevating arm;
A seat body provided on the elevating base and equipped with a seat belt;
A second slide mechanism for moving the seat body forward and backward in the same direction as the moving direction of the lifting support base with respect to the lifting base;
A part of the seat belt load applied to the seat body via the seat belt is transmitted to the vehicle floor by bypassing the rotation mechanism, the lifting mechanism and the second slide mechanism, and the vehicle of the seat body by the seat belt load is transmitted. A belt load transmission mechanism for regulating upward and forward movement relative to the floor,
After the seat body is rotated from a seating position facing the front of the vehicle in a vehicle interior to a lateral position facing the door opening side integrally with the lifting mechanism and the second slide mechanism by the rotation mechanism, the second slide mechanism And a vehicle seat configured to be moved forward and downward toward the door opening by the lifting mechanism and moved to a lower boarding / aiding position lower than the vehicle floor outside the vehicle compartment,
The belt load transmission mechanism is
A first load transmission member provided on the seat body so as to be movable between a restriction position and a restriction release position;
A biasing member that biases the first load transmitting member toward the restriction position;
A second load transmitting member provided on the elevating support base;
A third load transmitting member provided on the vehicle floor;
The forward / backward movement of the seat body with respect to the rotating base is transmitted to the first load transmitting member, and the biasing of the first load transmitting member is performed when the seat body is at the retracted end position of the sliding range with respect to the rotating base. While allowing the member to move toward the restriction position, when the seat body is in a position corresponding to the restriction release region, the first load transmission member is moved to the restriction release position against the biasing member. A deregulation mechanism to move,
The second load transmission member includes a first engagement portion and a second engagement portion,
The first load transmission member is positioned below the first engagement portion of the second load transmission member when the seat body is in the restricting position in a state where the seat main body is at the retracted end position of the slide range with respect to the rotation base. When the seat body is in the restriction position, the second load transmission member when the seat body is in the restriction position, and the upper engagement portion restricts the upward movement of the seat body with respect to the first engagement portion. A horizontal engagement portion that is located behind the first engagement portion and restricts forward movement of the seat body with respect to the rotation base by engagement with the first engagement portion, and the restriction release position. The horizontal engagement portion is retracted from the rear position of the first engagement portion when positioned at the position, and is engaged with the first engagement portion of the second load transmission member when the seat body moves forward relative to the lifting support base. It is configured to avoid
The third load transmission member is positioned above the second engagement portion of the second load transmission member when the seat body is in a position facing the front of the vehicle, and normally the rotation of the seat body with respect to the vehicle floor is performed. On the other hand, engagement with the second engagement portion is avoided, and when the second engagement portion moves upward with respect to the vehicle floor, the second engagement portion engages and the second load transmission is performed. A floor engaging portion for restricting the member from moving upward and forward relative to the vehicle floor;
When the seat body is moved from the lateral position to the boarding / alighting assist position, the seat body is advanced to a position corresponding to the restriction release region by the operation of the first slide mechanism, and the first load transmission member is moved to the position. A vehicle seat configured to be moved to a restriction release position, then advanced to a forward end position of a slide range with respect to the lifting base by the second slide mechanism, and then lowered by the lifting mechanism. The vehicle seat according to claim 1,
The restriction release mechanism includes an operation lever provided in the seat body so as to be movable between a restriction operation position and a restriction release operation position;
The operation of the operating lever is transmitted to the first load transmitting member, and when the operating lever moves to the restricting operation position, the first load transmitting member is allowed to move to the restricting position by the biasing member. An operation transmission member that moves the first load transmission member to the restriction release position against the biasing member when the operation lever moves to the restriction release operation position;
When the seat body is located at the retracted end position of the slide range relative to the rotating base, the operating lever is moved to the restricting operating position, and the seat body moves forward from the retracted end position. A vehicle seat including a lever guide member that moves the operation lever to the restriction release operation position in a state corresponding to the restriction release region.

Images