JP4952399B2 - Vehicle seat - Google Patents

Description

  The present invention includes a rotation mechanism that rotates a seat body between a seating position facing forward of the vehicle and a lateral position facing the door opening side, and the seat body is mounted in a lateral position where the seat body faces the door opening side. The present invention relates to a vehicle seat provided with an elevating slide mechanism that is lowered to the outside.

A technique related to the above-described vehicle seat is disclosed in Patent Document 1.
In this vehicle seat, as shown in the schematic side view of FIG. 11A, hooks 103 that extend in the forward and backward direction of the seat body 120 are attached to both side surfaces of the lifting slide mechanism 100. The seat main body 120 (only the rear portion of the frame is shown in FIG. 11) is placed on a lift base (not shown) of the lift slide mechanism 100 in a state where it can be moved forward and backward with respect to the lift slide mechanism 100. Further, on both sides of the seat main body 120, cylindrical sliders 122 into which the hooks 103 are inserted from the rear end side when the seat main body 120 moves backward (moves to the right side in the figure) with respect to the lifting / lowering slide mechanism 100 are provided. Is provided. An engaged portion 122k that engages with the hook 103 when the seat body 120 attempts to move forward and upward under the seat belt load at the time of a vehicle collision is formed below the rear portion of the slider 122. Yes.
Therefore, when the seat main body 120 moves forward / backward with respect to the lifting / lowering slide mechanism 100 during normal operation, the hook 103 does not engage with the engaged portion 122k, and the forward / backward movement of the seat main body 120 is not hindered. However, if the seat main body 120 tries to move forward and upward by the seat belt load F at the time of a vehicle collision, the hook 103 engages with the engaged portion 122k as shown in FIG. Is held by the lifting slide mechanism 100.

JP 2005-34327 A

In the above-described vehicle seat, the hook 103 is arranged at a constant interval in the vertical direction from the engaged portion 122k so that the forward / backward movement of the seat body 120 is not hindered during normal operation. Further, when the seat main body 120 is about to move forward and upward due to the seat belt load F at the time of a vehicle collision, the hook 103 is positioned in front of the engaged portion 122k so that the hook 103 engages with the engaged portion 122k. Is arranged.
For this reason, when the seat body 120 moves forward and upward due to the seat belt load F, the idle running distance that the seat body 120 moves before the hook 103 engages with the engaged portion 122k is increased.

  The present invention has been made in order to solve the above problems, and the problem to be solved by the present invention is to shorten the idle running distance when the seat body moves forward with a seat belt load as much as possible. This is to prevent the engaging member (hook) and the engaged portion from obstructing the forward / backward movement of the seat body during normal operation.

The above-described problems are solved by the inventions of the claims.
The invention of claim 1 includes a seat body, a rotation mechanism having a rotation base that rotates along a vehicle floor, a first slide mechanism that is installed on the rotation base and has a slide base that moves forward and backward, and one end of the first slide mechanism. A link mechanism that is connected to the slide base so as to be vertically rotatable, a guide mechanism that guides the link mechanism so that the other end of the link mechanism moves up and down as the slide base moves forward and backward, and the link mechanism A second slide mechanism that supports the seat body so that the seat body can be moved forward and backward at the end, and the rotation base is rotated by the rotation mechanism from a seating position facing forward of the vehicle to a lateral position facing the door opening, Is moved forward with respect to the link mechanism by the second slide mechanism, and the seat body is moved by the first slide mechanism to the slide base. A vehicle seat that moves from the indoor position to the outdoor position by being lowered while being advanced together with the link mechanism, and moves the seat main body from the outdoor position to the indoor position by the reverse operation, provided on the seat main body The seat body is provided in a member integrated with the slide base in the forward and backward direction so as to be movable between the restriction position and the restriction release position, and the seat body is in the backward position with respect to the link mechanism. The seat body moves to a position facing the engaged portion of the seat body in the forward direction of the seat body, and moves to the regulation release position by moving to the regulation position. An engaging member that retracts to a position that does not oppose the engaging portion in the forward direction, an urging member that urges the engaging member toward the restricting position, and the rotation And the slide base moves forward by a predetermined distance from the retracted position to the position near the retracted position with respect to the rotating base by the operation of the first slide mechanism. And a guide portion that moves to the restriction release position against the force of the biasing means.

According to the present invention, when the seat body is in the retracted position with respect to the link mechanism and the slide base is in the retracted position with respect to the rotation base (the seat body is in the indoor position), the engagement on the slide base side is performed. The member is held at the restricting position by the action of the biasing member. In other words, the engagement member on the slide base side advances from the rear upper side to the engaged portion of the seat body to a position facing the seat body in the forward and backward direction, and is held at that position.
For this reason, when the seat body moves forward or forward and upward due to a seat belt load at the time of a vehicle collision, the engaging member quickly engages with the engaged portion, and the seat body is rotated by a rotating base via a slide base or the like. Retained. That is, it is possible to minimize the idle travel distance in which the seat body moves forward until the engaging member engages with the engaged portion.
Further, the first slide mechanism advances the slide base by a predetermined distance from the retreat position to the retreat vicinity position with respect to the rotation base, so that the engagement member does not face the engaged portion in the advance direction by the function of the guide portion. Move to the restriction release position. Therefore, even when the seat body is moved forward / backward with respect to the link mechanism by the second slide mechanism in a state where the slide base is in the position near the retracted position, the engaging member is engaged with the engaged portion of the seat body. There is nothing. That is, the forward / backward movement of the seat body during normal operation is not hindered.

According to the invention of claim 2, the guide portion moves the engagement member to the restriction release position against the force of the biasing member in the process in which the slide base is retracted to the position near the retreat by the operation of the first slide mechanism. It is characterized by that.
For this reason, when the link mechanism is retracted, the seat base is held in the position near the retreat, and the seat body is held in the restriction release position against the force of the biasing member, and the seat body is moved to the second slide mechanism. By this, it is possible to retract to the retracted position with respect to the link mechanism.
According to the invention of claim 3, the engaging member is formed with an inclined receiving surface on which the abutting portion of the seat body abuts in the process of the seat body retracting from the link mechanism by the operation of the second slide mechanism. The abutting portion of the sheet main body is in sliding contact with the inclined receiving surface of the engaging member held at the restricting position together with the slide base by the retreat of the sheet main body. When the engaging member moves in the direction of the restriction release position against the force of the urging member and the seat main body is further retracted, the inclined receiving surface of the engaging member is released from the contact portion of the seat main body. The engagement member moves in the direction of the restriction position facing the engaged portion of the seat body by the force of the biasing member.
For this reason, the seat body can be retracted to the retracted position with respect to the link mechanism by the second slide mechanism while the slide base is held at the retracted position and the engaging member is held at the restricting position. Therefore, there is no need to retract the seat body with respect to the link mechanism in a state where the slide base is temporarily stopped at the position near the retreat and the engagement member is held at the restriction release position.

According to the invention of claim 4, the seat body is in the retracted position with respect to the link mechanism, the slide base is in the retracted position with respect to the rotation base, and the engaging member faces the engaged portion of the seat body. The seat body is advanced with respect to the link mechanism by a second slide mechanism in a state of being in the restricting position, and the engaging member and the engaged portion of the seat body are engaged. .
Thus, by previously engaging the engaging member and the engaged portion of the seat body, the idle running distance of the seat body when a seat belt load is applied to the seat body can be made substantially zero. .

  According to the present invention, since the engaging member and the engaged portion are quickly engaged by the seat belt load at the time of a vehicle collision, the idle running distance when the seat body moves forward can be shortened as much as possible. Further, the engaging member and the engaged portion do not hinder forward and backward movement of the seat body during normal operation.

Hereinafter, based on FIGS. 1-10, the vehicle seat which concerns on Embodiment 1 of this invention is demonstrated. The vehicle seat according to the present embodiment is a seat used for a passenger seat of a vehicle, and the seat body is configured to be usable as a wheelchair. FIG. 1 is a schematic rear view of a vehicle seat, FIG. 2 is a side view of the vehicle seat when the seat body is rotated 90 ° counterclockwise, and FIGS. 3 and 4 show engaging members and engaged portions. FIG. 5 to 7 are side views showing the operation of the vehicle seat, FIG. 8 is a side view showing a state in which the seat body (wheelchair) and the lifting base are separated, and FIG. 9 is a plan view showing the operation of the vehicle seat. is there. FIG. 10 is a side view showing the engaging member and the engaged portion according to the modified example.
In addition, front and rear, right and left and up and down in the figure correspond to front and rear, right and left and up and down in the vehicle.

<About the outline of the vehicle seat 1>
As shown in FIG. 9, the vehicle seat 1 according to the present embodiment horizontally rotates the seat body 10 from the front-facing seating position to the lateral position facing the door opening, and then from the door opening to the outside of the vehicle compartment. It is a device that moves forward horizontally and further moves forward and down to the boarding / alighting position, and is configured to return the seat body 10 to the seating position by the reverse operation.
As shown in FIG. 1, the vehicle seat 1 includes a front / rear slide mechanism 30 installed on the vehicle floor F, a rotation mechanism 20 installed on a front / rear slide base 34 of the front / rear slide mechanism 30, and the rotation mechanism. 20 is provided with an elevating mechanism 80 and a second slide mechanism 50 installed on the rotation base 25, and a seat body 10 placed on the second slide mechanism 50.

<Fore-and-aft slide mechanism 30>
The front / rear slide mechanism 30 is a mechanism that moves the seat body 10 in the vehicle front-rear direction, and includes a pair of left and right stationary rails 32, a front / rear slide base 34, and a drive mechanism 35. The pair of left and right fixed rails 32 are installed on the fixed base BF of the vehicle floor F so as to extend in parallel with the vehicle longitudinal direction. The front / rear slide base 34 is supported by the pair of left and right fixed-side rails 32 at both end edges so that the front / rear slide base 34 can slide back and forth. The drive mechanism 35 is screwed into the screw shaft 35b, a screw shaft 35b supported by the fixed base BF in a state parallel to the fixed rail 32, a motor 35a that rotates the screw shaft 35b around the axis, and the screw shaft 35b. And a nut 35n fixed to the lower surface of the front / rear slide base 34. Then, the screw shaft 35b is rotated forward or backward by the drive motor 35a, so that the nut 35n and the front / rear slide base 34 that are screwed with the screw shaft 35b slide in the front-rear direction.

<About Rotating Mechanism 20>
A rotation mechanism 20 is installed on the front / rear slide base 34. The rotation mechanism 20 is a mechanism that rotates the seat body 10 by approximately 90 ° between a seating position facing forward of the vehicle and a lateral position facing the door opening side.
The rotation mechanism 20 includes an inner ring 22 and an outer ring 23 that can rotate relative to each other. The outer ring 23 is fixed to the front / rear slide base 34, and the inner ring 22 is fixed to the rotation base 25. A rotation motor 27 is fixed to the upper surface of the front / rear slide base 34. The rotation output of the rotary motor 27 is transmitted to the inner ring 22 via a gear transmission mechanism (not shown), whereby the rotation base 25 rotates with respect to the front / rear slide base 34.

<About lifting mechanism 80>
A first slide mechanism 40 that constitutes a lifting mechanism 80 is installed on the rotary base 25. The first slide mechanism 40 is a mechanism that functions as an operation source of the elevating mechanism 80, and moves the seat body 10 or the like in a lateral position facing the door opening side forward or backward.
As shown in FIG. 1, the first slide mechanism 40 includes a pair of guide rails 42 attached in parallel along both left and right edges of the rotation base 25. The guide rail 42 is formed in a U-shaped cross section, and is installed on the rotary base 25 so that the concave portions thereof face each other. And the guide roller 43 of the 1st slide base 44 is engage | inserted by the recessed part of each guide rail 42. As shown in FIG. The first slide base 44 is provided with a plurality of guide rollers 43 on the left and right, and these guide rollers 43 are fitted in the recesses of the respective guide rails 42 so as to roll along the guide rails 42. It is configured.
As shown in FIG. 1, a screw shaft 45b is supported on the rotation base 25 in parallel with the guide rail 42 so as to be rotatable around the axis, and the rotation shaft (of the drive motor 45a is connected to one end of the screw shaft 45b. (Not shown) are connected coaxially. A nut 45n that is screwed onto the screw shaft 45b is fixed to the lower surface of the first slide base 44. As a result, the screw shaft 45b is rotated forward or reversely by the action of the drive motor 45a, whereby the first slide base 44 is moved along the guide rail 42 on the rotary base 25 by the screwing action of the screw shaft 45b and the nut 45n. Move forward and backward.

  As shown in FIGS. 1 and 5 to 7, a pair of left and right four-joint link mechanisms 84 constituting an elevating mechanism 80 are connected to the first slide base 44 in a state in which the first slide base 44 can tilt up and down. Each of the pair of left and right four-bar linkage mechanisms 84 includes an inner link arm 84a and an outer link arm 84b. And the base end part of both link arms 84a and 84b is supported by the side part of the 1st slide base 44 so that an up-down rotation is possible via a spindle (illustration number abbreviation). Further, as shown in FIG. 6 and the like, the side walls of the elevating base 85 are connected to the distal ends of the link arms 84a and 84b via the support shafts so as to be vertically rotatable. Note that the support shafts of both link arms 84 a and 84 b are displaced in the front-rear direction of the seat body 10.

  Further, as shown in FIG. 7, left and right outer link arms 84 b are supported at the front end portion of the rotary base 25, and the forward or backward movement of the four-bar linkage mechanism 84 is changed to the lowering or raising movement of the lifting base 85. A guide mechanism 88 for conversion is provided. That is, when both link arms 84a and 84b of the four-bar linkage mechanism 84 move forward as the first slide base 44 advances, the distance between the guide mechanism 88 and the first slide base 44 decreases, and the four-bar link mechanism 84 The first slide base 44 rotates downward about the support shaft. Thereby, the raising / lowering base 85 connected with the front-end | tip of the four-bar linkage mechanism 84 falls horizontally. Further, when both link arms 84a and 84b of the four-bar linkage mechanism 84 are retracted as the first slide base 44 is retracted, the distance between the guide mechanism 88 and the first slide base 44 is increased, and the four-bar link mechanism 84 is The first slide base 44 rotates upward about the support shaft. Thereby, the raising / lowering base 85 connected with the front-end | tip of the four-bar linkage mechanism 84 raises.

<About the second slide mechanism 50>
As shown in FIG. 1, the second slide mechanism 50 is installed on the elevating base 85. The second slide mechanism 50 is a mechanism for moving the seat body 10 forward or backward on the lift base 85.
The second slide mechanism 50 includes a seat base 51 that supports the seat body 10, and the seat base 51 is configured to be slidable in the seat front-rear direction with respect to the lift base 85. Guide rails 51 a extending in the front-rear direction of the seat are fixed to the left and right wall portions protruding to the lower surface side of the seat base 51. The guide rail 51a is formed in a U-shaped cross section, and is attached to the left and right wall portions so that the respective concave portions face each other. A guide roller 86 that is rotatably mounted on the side surface of the elevating base 85 is fitted in the recess of each guide rail 51a. The elevating base 85 includes a plurality of guide rollers 86 on the left and right sides, and these guide rollers 86 are fitted into the recesses of the respective guide rails 51a so as to roll along the guide rails 51a. ing.
A screw shaft (not shown) is supported on the lower surface of the seat base 51 in parallel with the guide rail 51a so as to be rotatable about the axis, and a rotating shaft (not shown) of the drive motor 52a is provided at one end of the screw shaft. Are connected coaxially. A nut 52c that is screwed onto the screw shaft is fixed to the upper surface of the elevating base 85. As a result, the screw shaft rotates forward or reverse by the action of the drive motor 52a, so that the seat body 10 and the seat base 51 slide against the lift base 85 by the screwing action of the screw shaft and the nut 52c. It becomes like this.

<About the sheet body 10>
The seat body 10 is a seat that can be used as a wheelchair by being separated from the sliding base 51 at an outdoor entry / exit position, and includes a seat frame 13, a seat cushion 11, and a seat back 12, as shown in FIG. Yes. A front wheel 14 and a rear wheel 15 are attached to the seat frame 13 in a state where the front wheel 14 and the rear wheel 15 can be unfolded or stowed. The position is maintained (see the two-dot chain line in FIG. 8). 1 and 5 to 7, the seat frame 13 of the seat body 10 is omitted.
The seat body 10 is connected to the slide base 51 and returned to the room by the second slide mechanism 50 and the elevating mechanism 80, and is then attached to the outer link arm 84 b of the four-bar linkage mechanism 84 by the slide lock mechanism 60 described later. Connected.
The slide lock mechanism 60 is omitted in FIGS.

<About the slide lock mechanism 60>
The slide lock mechanism 60 is configured so that the seat main body 10 is moved by the inertial force (seat belt load) of the seated person received through the seat belt or the inertial force of the seat main body 10 when the seat main body 10 is in the seating position facing the front of the vehicle. This is a mechanism that restricts the forward movement of the rotary base 25 (specifically, the four-bar linkage mechanism 84). The rotation base 25 is restricted from moving forward relative to the vehicle floor F by a rotation base locking mechanism (not shown) in a state where the seat body 10 is returned to the seating position facing the vehicle forward.
As shown in FIG. 2 and the like, the slide lock mechanism 60 is connected to the engaged portion 62 provided on the seat frame 13 of the seat body 10 and the base end portion of the four-bar linkage mechanism 84 that moves together with the first slide base 44. The engaging member 70 is provided and a guide portion 90 installed on the rotation base 25.

  The engaged portion 62 of the slide lock mechanism 60 is a portion on which a hook 72 (described later) of the engaging member 70 is hooked, and is a rectangular tube-shaped slider 61 provided on the left and right sides of the seat frame 13 of the seat body 10. Is formed. The slider 61 is a member used for expanding / retracting the wheel of the seat body 10, and is provided so as to extend in the front-rear direction along the seat frame 13. The lower plate 61d of the slider 61 is formed with a slit-like opening 61h extending in the front-rear position in the vicinity of the rear end, and an engaged portion 62 is provided on the rear end wall surface of the opening 61h.

The engaging member 70 is provided on both the left and right sides of the base end portion of the four-bar linkage mechanism 84 corresponding to the engaged portion 62 of the slider 61. As shown in FIGS. 3 (A) and 3 (B), the engaging member 70 includes a hook 72, a hook support shaft 71, a coil spring 76, a hook pressing plate 74, and the hooked portion 62 that are hung from above. It is composed of
The hook 72 is a tapered plate-like member having a lower collar portion 72k at the tip, and a through hole 72h through which the hook support shaft 71 is passed is formed at a substantially central position in the longitudinal direction of the hook 72. The hook support shaft 71 is a member that connects the hook 72 to the outer surface of the outer link arm 84b of the four-bar linkage mechanism 84 in a state in which the hook 72 can be turned up and down. As shown in FIG. 3B, the hook support shaft 71 is welded to the outer link arm 84b in a state where the base end portion is passed through the fixing hole 84x of the outer link arm 84b. The hook 72 is attached to the tip end portion of the hook support shaft 71 so as to be pivotable up and down.
Further, a cam follower 72 c is provided at the base end portion of the hook 72 so as to protrude in the outer direction of the outer link arm 84 b in parallel with the hook support shaft 71.

At the tip of the hook support shaft 71, a hook pressing plate 74 is mounted to prevent the hook 72 from coming off. The hook pressing plate 74 is fitted to the tip of the hook support shaft 71 to hold the hook 72 from the outer side, a fixing portion 74s bolted to the side surface of the outer link arm 84b, and a pressing plate main body portion. As shown in FIG. 3 (B), the connecting plate portion 74c provided between the 74p and the fixing portion 74s has a substantially Z-shaped cross section.
A coil spring 76 is mounted around the hook support shaft 71, and one end of the coil spring 76 is hooked on the hook pressing plate 74. The other end of the coil spring 76 is hooked on the hook 72. The coil spring 76 is urged in a direction to rotate the hook 72 counterclockwise in FIG.

The guide portion 90 is a member provided with cam surfaces 82 and 83 along which the cam follower 72 c of the hook 72 extends, and is provided on both sides of the rotary base 25 corresponding to the hook 72.
The guide portion 90 rotates the hook 72 up and down around the hook support shaft 71 by moving the hook 72 forward or backward with respect to the guide portion 90 together with the first slide base 44 and the four-bar linkage mechanism 84 ( This is a member to be rotated right and left in FIG. The guide portion 90 is formed in a right-angled triangular shape whose side surface shape is opposite, and the lower inclined surface 90k of the guide portion 90 is the forward direction of the seat body 10 (the left direction in FIGS. 2 and 3A). It is formed to be higher on the tip side. A substantially inverted V-shaped notch 91 that opens downward is formed at a position closer to the tip of the lower inclined surface 90k, and the wall surface on the front side (left side in FIG. 3A) of the notch 91 is formed. A first cam surface 92 along which the cam follower 72c of the hook 72 is provided.
The first cam surface 92 is inclined such that the cam follower 72c gradually advances in the process of moving from the back side (upper side) to the opening side (lower side) of the notch 91. The lower inclined surface 90k of the guide portion 90 located on the front side of the first cam surface 92 is used as the second cam surface 93. Further, a boundary portion (top portion) between the first cam surface 92 and the second cam surface 93 is chamfered in an arc shape.

As shown in FIG. 3A, when the first slide base 44 and the four-bar linkage mechanism 84 are in the retracted position with respect to the rotation base 25, the hook 72 receives a force in the left rotation direction by the coil spring 76. The cam follower 72 c of the hook 72 is in contact with the upper side of the first cam surface 92. That is, the hook 72 is in the left rotation limit position, and the cam follower 72c of the hook 72 is inserted into the depth of the notch 91. The lower flange portion 72k of the hook 72 is passed from above to the opening 61h of the slider 61 of the seat body 10 held at the retracted position with respect to the four-bar linkage mechanism 84, and the forward movement direction of the engaged portion 62 and the seat body 10 is increased. Are facing each other.
That is, the left rotation limit position of the hook 72 corresponds to the restricting position of the engaging member in the present invention.

Next, as shown in FIG. 3A, the first slide mechanism 40 operates to move the first slide from the state in which the lower collar portion 72k of the hook 72 faces the engaged portion 62 of the seat body 10. When the base 44, the four-bar linkage 84, and the hook 72 advance, the cam follower 72 c of the hook 72 moves forward and downward along the first cam surface 92. As a result, the hook 72 rotates rightward in the drawing against the spring force of the coil spring 76, and the lower collar portion 72 k of the hook 72 is detached upward from the opening 61 h of the slider 61 of the seat body 10. As shown in FIG. 4, when the cam follower 72 c of the hook 72 reaches between the first cam surface 92 and the second cam surface 93, the hook 72 reaches the right rotation limit position. In this state, the lower collar portion 72k of the hook 72 is held at a position that does not face the engaged portion 62 of the seat body 10 in the forward direction. For this reason, it is possible for the seat body 10 to move forward with respect to the four-bar linkage mechanism 84 by the operation of the second slide mechanism 50 in a state where the hook 72 is at the right rotation limit position.
Thus, the right rotation limit position of the hook 72 corresponds to the restriction release position of the engaging member in the present invention. And the position of the 1st slide base 44 grade | etc., With respect to the rotation base 25 at this time is equivalent to the retreat vicinity position of this invention. The coil spring 76 corresponds to the biasing member of the present invention.

After the seat body 10 has moved forward by the operation of the second slide mechanism 50, when the first slide base 44, the four-bar linkage mechanism 84 and the hook 72 move forward again from the position shown in FIG. 4, the cam follower 72c of the hook 72 is moved to the second cam. The hook 72 moves forward along the surface 93 and rotates to the left in the figure by the spring force of the coil spring 76. When the cam follower 72 c of the hook 72 is separated from the second cam surface 93, the hook 72 is held at the left rotation limit position (restricted position) by the spring force of the coil spring 76.
Contrary to the above, when the four-bar linkage 84 is retracted, the cam follower 72c of the hook 72 is moved to the second cam surface 93 in the process in which the first slide base 44, the four-bar linkage 84 and the hook 72 are retracted. Abut. Then, when the cam follower 72c moves rearward and downward along the second cam surface 93, the hook 72 rotates to the right in the drawing against the spring force of the coil spring 76 and is returned to the restriction release position.

<About the operation outline of the vehicle seat 1>
Next, the operation of the slide lock mechanism 60 will be described while briefly explaining the operation of the vehicle seat 1.
When the seat body 10 is in the indoor seating position, the first slide base 44, the four-bar linkage mechanism 84, and the engagement member 70 (hook 72) are in the retracted position with respect to the rotation base 25 by the action of the first slide mechanism 40. The seat body 10 is in the retracted position with respect to the four-bar linkage mechanism 84 by the action of the second slide mechanism 50. As shown in FIG. 3A, the hook 72 of the engagement member 70 is at the left rotation limit position (regulation position), and the lower collar portion 72k of the hook 72 is connected to the slider 61 of the seat body 10. The engaged portion 62 provided faces the seat body 10 in the forward direction.
For this reason, for example, when the seat body 10 moves forward or forward and upward due to a seat belt load at the time of a vehicle collision, the engaged portion 62 of the seat body 10 and the lower collar portion 72k of the hook 72 are quickly engaged. Then, the slide lock mechanism 60 operates, and the seat body 10 is held on the rotary base 25 via the four-bar linkage mechanism 84 and the first slide mechanism 40.

Next, a procedure for moving the seat body 10 to the outdoor boarding / exiting position will be described.
First, after the seat body 10 is moved to the indoor rotation position by the front / rear slide mechanism 30, the seat body 10 is horizontally rotated by about 90 ° to the lateral position facing the door opening side by the rotation mechanism 20 (see FIGS. 5 and 9). ).
Next, the first slide mechanism 40 on the rotation base 25 operates, and the first slide base 44 and the four-bar linkage mechanism 84 slightly move forward from the retracted position to the position near the retracted position with respect to the rotating base 25. As a result, the cam follower 72c of the hook 72 constituting the slide lock mechanism 60 moves forward and downward along the first cam surface 92 of the guide portion 90, and the hook 72 resists the spring force of the coil spring 76 as shown in FIG. ) Turn right. As a result, the lower collar portion 72k of the hook 72 moves upward so as to be detached from the opening 61h of the slider 61 of the sheet body 10. Then, in the state where the first slide base 44 and the four-bar linkage mechanism 84 have advanced to the position near the retreat, the cam follower 72c of the hook 72 is interposed between the first cam surface 92 and the second cam surface 93 as shown in FIG. The lower collar portion 72k of the hook 72 is detached from the opening 61h of the slider 61 of the sheet body 10. That is, the lower collar portion 72k of the hook 72 does not face the engaged portion 62 of the seat body 10 in the forward direction of the seat body 10.

In this state, the second slide mechanism 50 on the lifting base 85 of the four-bar linkage mechanism 84 operates and the seat body 10 moves forward in the outdoor direction as shown in FIG. As described above, the lower collar portion 72k of the hook 72 is not opposed to the engaged portion 62 of the seat body 10 in the advance direction of the seat body 10, and therefore the slide lock mechanism 60 does not prevent the advance of the seat body 10. In this way, when the seat body 10 advances to the advance position with respect to the lifting base 85 of the four-bar linkage mechanism 84, the first slide mechanism 40 on the rotation base 25 operates again, and the first slide base 44 is rotated. Advance to 25. As a result, as shown in FIG. 7, the distance between the guide mechanism 88 installed at the front end of the rotation base 25 and the first slide base 44 is reduced, and the four-bar linkage mechanism 84 is supported by the first slide base 44. Rotate downward about the center. Then, the seat body 10 placed on the elevating base 85 of the four-bar linkage mechanism 84 is lowered horizontally to the boarding / alighting position.
Further, when the first slide base 44 moves forward with respect to the rotary base 25, the cam follower 72c of the hook 72 moves forward along the second cam surface 93, and the hook 72 is turned counterclockwise in FIG. Move. When the cam follower 72 c of the hook 72 is separated from the second cam surface 93, the hook 72 is held at the left rotation limit position (restricted position) by the spring force of the coil spring 76.
The seat body 10 expands the front wheel 14 and the rear wheel 15 in the middle of lowering, and is ready for use as a wheelchair. Then, after the seat body 10 has landed, the elevating base 85 is further lowered, and the connection between the seat body 10 and the seat base 51 is released (see FIG. 8).

Further, when the seat body 10 is moved from the outdoor boarding / alighting position to the indoor seating position, an operation opposite to the above operation is performed.
That is, the first slide mechanism 40 on the rotation base 25 operates and the first slide base 44 and the four-bar linkage mechanism 84 move backward with respect to the rotation base 25. Thereby, the four-bar linkage mechanism 84 is stored, and the seat body 10 placed on the lifting base 85 is raised horizontally. Then, the cam follower 72 c of the hook 72 abuts on the second cam surface 93 of the guide portion 90 in the process in which the four-bar linkage mechanism 84 moves backward to the position near the backward movement. Then, when the cam follower 72 c moves backward along the second cam surface 93, the hook 72 rotates to the right in FIG. 4 against the spring force of the coil spring 76. The hook 72 is held at the right rotation limit position (restriction release position) in a state where the first slide base 44 and the four-bar linkage mechanism 84 have reached the position in the vicinity of the retreating position with respect to the rotation base 25. The first slide base 44 is stopped and held in this position (see FIG. 6).
Next, the second slide mechanism 50 on the elevating base 85 of the four-bar linkage mechanism 84 is operated, and the seat body 10 is retracted into the room as shown in FIG. At this time, the front end portion of the hook 72 is inserted into the slider 61 of the sheet main body 10 from the rear end side, as shown in FIG.
Next, the first slide mechanism 40 on the rotation base 25 is operated again, and the hook 72 is moved back to the retreat position with respect to the rotation base 25 together with the first slide base 44 and the four-bar linkage mechanism 84. As a result, the cam follower 72c of the hook 72 moves rearward and upward along the first cam surface 92, and the hook 72 rotates to the left in FIG. As a result, as shown in FIG. 3A, the lower collar portion 72k of the hook 72 enters the opening 61h of the slider 61 of the seat body 10 from above, and the lower collar portion 72k of the hook 72 is engaged with the seat body 10. The joining portion 62 and the seat body 10 face each other in the forward direction. Next, the rotation mechanism 20 and the front / rear slide mechanism 30 are operated to return the seat body 10 to the indoor seating position.

<Advantages of the vehicle seat 1 according to the present embodiment>
According to the vehicle seat 1 according to the present embodiment, the seat body 10 is in the retracted position with respect to the four-bar linkage mechanism 84, and the first slide base 44 is in the retracted position with respect to the rotation base 25 (sitting position). Then, the hook 72 attached to the four-bar linkage mechanism 84 is held at the left rotation limit position (regulation position) by the action of the coil spring 76. That is, the lower flange portion 72k of the hook 72 on the first slide base 44 and the four-bar linkage mechanism 84 side faces the engaged portion 62 of the seat body 10 in the forward direction of the seat body 10 from the rear upper side. Advances to a position and is held in that position.
For this reason, when the seat body 10 moves forward or forward and upward due to the seat belt load at the time of a vehicle collision, the hook 71 quickly engages with the engaged portion 62, and the seat body 10 is moved to the first slide base 44 and the like. It is held by the rotation base 25 via That is, the idle running distance that the seat body 10 moves forward before the hook 71 engages with the engaged portion 62 can be minimized.
Further, the first slide base 44 is advanced by a predetermined distance from the retreat position to the retreat vicinity position with respect to the rotation base 25, whereby the hook 72 is moved forward by the guide portion 90 and the forward movement direction of the engaged portion 62 and the seat body 10. To the right rotation limit position (regulation release position) that is not opposed to. Therefore, even if the seat body 10 is advanced relative to the four-bar linkage mechanism 84 with the first slide base 44 in a position near the retreat, the hook 72 engages with the engaged portion 62 of the seat body 10. There is no. That is, the forward / backward movement of the seat body 10 is not hindered.

<Modification example of vehicle seat 1>
Here, the present invention is not limited to the above-described embodiment, and can be modified without departing from the gist of the present invention. For example, in the present embodiment, in a state where the seat body 10 is in the retracted position with respect to the four-bar linkage mechanism 84 and the first slide base 44 is in the retracted position with respect to the rotation base 25 (sitting position), FIG. As shown in A), the lower collar portion 72k of the hook 72 and the engaged portion 62 of the seat body 10 are not in contact with each other, and both the portions 72k and 62 are held at positions facing each other in the forward direction of the seat body 10. ing. However, the second slide mechanism 50 is operated from this state to slightly advance the seat body 10 so that the lower flange portion 72k of the hook 72 is engaged with the engaged portion 62 of the seat body 10. Is possible. By doing so, the idle running distance of the seat body 10 when a seat belt load is applied to the seat body 10 can be made substantially zero.

Further, in the present embodiment, when the seat body 10 is moved from the outdoor position to the indoor seating position, the first slide base 44, the four-bar linkage mechanism 84, and the like are temporarily stopped at positions near the retreating position with respect to the rotation base 25, and the seat The main body 10 is retracted to the retracted position with respect to the four-bar linkage mechanism 84, and then the first slide base 44, the four-bar link mechanism 84, and the like are retracted to the retracted position with respect to the rotation base 25. However, as shown in FIG. 10, an inclined receiving surface 72z is formed on the lower side of the tip of the hook 72, and a rear lower corner portion 61e (contact portion 61e) of the slider 61 of the sheet body 10 is formed with respect to the inclined receiving surface 72z. By making the contact possible, the first slide base 44, the four-bar linkage mechanism 84, and the like can be retreated directly to the retreat position with respect to the rotation base 25 without being stopped at the retreat vicinity position.
That is, as shown in FIG. 10A, when the seat body 10 is moved backward with respect to the four-bar linkage mechanism 84 in a state where the first slide base 44 and the four-bar linkage mechanism 84 are in the retracted position with respect to the rotation base 25. The abutting portion 61 e of the slider 61 of the sheet main body 10 abuts on the inclined receiving surface 72 z of the hook 72. As a result, the inclined receiving surface 72z of the hook 72 is pressed against the contact portion 61e of the seat body 10, and the hook 72 rotates to the right against the spring force of the coil spring 76. That is, the tip portion of the hook 72 moves upward against the spring force of the coil spring 76. As a result, the inclined receiving surface 72z of the hook 72 is detached from the contact portion 61e, and the tip end portion of the hook 72 is inserted into the slider 61 as the sheet body 10 is retracted. When the tip end portion of the hook 72 reaches the position of the opening 61h of the slider 61, the hook 72 is rotated to the left by the spring force of the coil spring 76, and the lower collar portion 72k of the tip end of the hook 72 is inserted into the opening 61h. It comes to oppose the engaging part 62.
In this way, the first slide base 44, the four-bar linkage mechanism 84, and the like can be retreated directly to the retreat position with respect to the rotation base 25 without stopping at the retreat vicinity position. It will be easy.

  In the vehicle seat 1 according to the present embodiment, the seat body 10 is operated by operating the front / rear slide mechanism 30, the rotation mechanism 20, the first slide mechanism 40, the second slide mechanism 50, and the first slide mechanism 40 in order. An example of moving the vehicle from the indoor seating position to the outdoor boarding / exiting position is shown. However, in order to quickly move the seat main body 10 from the indoor seating position to the outdoor entry / exit position, for example, each mechanism 30, 20, It is also possible to partially overlap the 30, 40 operating times.

It is a model rear view of the vehicle seat which concerns on Embodiment 1 of this invention. FIG. 6 is a side view of the vehicle seat when the seat body is rotated 90 ° counterclockwise. It is a side view (A figure) showing the engaging member and to-be-engaged part of a slide lock mechanism, and BB arrow sectional drawing (B figure) of A figure. It is a side view showing the engaging member and engaged part of a slide lock mechanism. It is a side view showing operation of a vehicular seat. It is a side view showing operation of a vehicular seat. It is a side view showing operation of a vehicular seat. It is a side view showing the state which isolate | separated the seat main body (wheelchair) and the raising / lowering base. It is a top view showing operation | movement of the vehicle seat. It is a side view (A figure, B figure) showing the engaging member of the slide lock mechanism which concerns on the example of a change, and an engaged part. It is a schematic side view (A figure, B figure) showing the slide lock mechanism of the conventional vehicle seat.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Seat main body 20 ... Rotation mechanism 25 ... Rotation base 40 ... 1st slide mechanism 44 ... 1st slide base (slide base)
50 ... second slide mechanism 61 ... slider 61e ... abutting part 62 ... engaged part 70 ... engaging member 72 ... hook 72k ... lower hook part 72z ... receiving surface 76 ... Coil spring (biasing member)
80 ... Elevating mechanism 84 ... Four-bar linkage mechanism (link mechanism)
88 ... Guide mechanism 90 ... Guide part 92 ... First cam surface 93 ... Second cam surface

Claims (4)

A seat body, a rotation mechanism having a rotation base that rotates along the vehicle floor, a first slide mechanism that is installed on the rotation base and has a slide base that moves forward and backward, and one end of which can be turned up and down on the slide base. A link mechanism coupled to the slide base, a guide mechanism that guides the link mechanism so that the other end of the link mechanism moves up and down as the slide base moves forward and backward, and the seat body moves forward to the other end of the link mechanism A second slide mechanism that is supported so as to be retractable, the rotation base is rotated by the rotation mechanism from a seating position facing forward of the vehicle to a lateral position facing the door opening side, and the seat body is moved by the second slide mechanism. Advancing in the outdoor direction with respect to the link mechanism, and further, the seat body is moved by the first slide mechanism to the slide base and the link machine. By lowering while advancing is moved from the indoor position to the outside position, a vehicle seat to move the seat body by a reverse operation from the outdoor location to the room location with,
An engaged portion provided in the seat body;
When the seat body is in a retracted position with respect to the link mechanism, the restricting position is provided in a member integrated with the slide base in the forward / backward direction so as to be movable between a restriction position and a restriction release position. To the engaged portion of the sheet main body, advance to a position facing the engaged portion of the sheet main body in the advance direction of the sheet main body, and move forward to the engaged portion by moving to the restriction release position. An engaging member that retracts to a position that does not face
A biasing member that biases the engagement member in the direction of the restriction position;
The engagement member provided at the rotation base is moved forward by a predetermined distance from a retraction position to a position near the retraction with respect to the rotation base by an operation of a first slide mechanism, and the engagement member at the restriction position is A guide portion that moves to the restriction release position against the force of the biasing means;
A vehicle seat comprising: The vehicle seat according to claim 1,
The guide portion moves the engagement member to the restriction release position against the force of the biasing member in a process in which the slide base is retracted to the position near the retreat by the operation of the first slide mechanism. A vehicle seat. The vehicle seat according to claim 1,
The engaging member is formed with an inclined receiving surface on which the abutting portion of the seat body abuts in the process of retreating the seat body with respect to the link mechanism by the operation of the second slide mechanism.
The abutting portion of the sheet main body is in sliding contact with the inclined receiving surface of the engaging member held in the restricting position together with the slide base by the retreating of the sheet main body. When the engagement member moves in the direction of the restriction release position against the force of the urging member, and the seat body is further retracted, the inclined receiving surface of the engagement member becomes the contact portion of the seat body. The vehicle seat, wherein the engaging member moves in the direction of the restriction position facing the engaged portion of the seat body by the force of the biasing member. A vehicle seat according to any one of claims 1 to 3, wherein
The restriction position where the seat body is in a retracted position with respect to the link mechanism, the slide base is in a retracted position with respect to the rotating base, and the engaging member is opposed to the engaged portion of the seat body. In this state, the seat body is advanced with respect to the link mechanism by the second slide mechanism, and the engaging member and the engaged portion of the seat body are engaged. .

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