JP2002187468A - Seat for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat for a vehicle in which a seat main body does not leave off the vehicle when shock is applied to the vehicle. SOLUTION: The seat for a vehicle is provided with a seat main body 10, a hoisting and lowering mechanism 50b which forces the seat main body 10 to shift in the longitudinal direction thereof and hoist and lower, and a direction changing mechanism 50a which integrally rotates the hoisting and lowering mechanism 50b and the seat main body 10 and changes the direction of the seat main body 10. In this seat, a shock locking mechanism 30 which connects the seat main body 10 with the vehicle so as not to relatively move when the shock is applied to the vehicle in a state where the seat main body 10 is lowered in a seating position inside of a cabin by the hoisting and lowering mechanism 50b is provided. With this reason, when the shock is applied to the vehicle in a state where an occupant is seated on the seat main body during traveling of the vehicle, the shock locking mechanism acts thereon and the seat main body and the vehicle are locked so as not to relatively move.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat body, an elevating mechanism for moving the seat body up and down while moving the seat body in the front-rear direction of the seat body, and integrally rotating the elevating mechanism and the seat body. The present invention relates to a vehicle seat provided with a direction change mechanism for changing the direction of a seat body, for example, a vehicle seat that enables an elderly person, a disabled person, or the like (a seated person) to easily get on and off the vehicle.

[0002]

2. Description of the Related Art A general vehicle seat of this kind is shown in FIG.
And in FIG. The vehicle seat 80 includes a main base 83 configured to be slidable back and forth, and a rotation mechanism 84 is installed on the main base 83. A swing base 87 is installed on the rotation mechanism 84, and a frame 89 of the seat body 81 is attached to the swing base 87 via a pair of left and right four-bar linkages 88. According to this structure, the seat body 81 is rotated by, for example, about 90 ° to the left by the rotation mechanism 84 so as to be directed from the vehicle front side to the door opening side, and an electric cylinder (not shown) is operated to activate the four-bar linkage mechanism 88. When the seat body 81 is tilted outward, the seat body 81 can be swung out through the door opening. Further, the seat body 81 outside the room is returned to the vehicle interior by the four-bar linkage 88, and the rotation mechanism 8 is further rotated.
By rotating the seat body 81 rightward by about 90 ° in step 4, the seat body 81 is oriented to the front of the vehicle (hereinafter referred to as the original position).
Can be returned to

A swing lock mechanism 90 is provided between the frame 89 of the seat body 81 and the swing base 87, as shown in FIG. The swing lock mechanism 90 is a mechanism for locking the seat body 81 at the original position, and includes a hook 92 fixed to a frame 89, a lock holder 94 mounted on the swing base 87 so as to be vertically rotatable, and fixed to the main base 83. And an anchor hook 95 provided.

When the seat body 81 returned to the vehicle interior by the four-bar link mechanism 88 is turned to the vicinity of the original position by the rotation mechanism 84 from the state where the seat body 81 faces the door opening side, as shown in FIG. The lower end of 94 contacts the anchor hook 95. When the seat body 81 further rotates to the original position from this state, the anchor hook 95 presses the lower end of the lock holder 94 in the horizontal direction, and the lock holder 94 rotates rightward in the figure (rotates upward) around the rotation shaft 94p. ). As a result, the lock pin 94r of the lock holder 94 is engaged with the hook 92 fixed to the frame 89 from substantially horizontal front, and the frame 89 and the swing base 8
7, the seat body 81 is locked at the original position.

[0005]

However, the swing lock mechanism 90 of the vehicle seat 80 does not
The lock pin 94r of the lock holder 94 is engaged with the hook 92 of FIG.
See, for example, the vehicle is collided from behind and the seat body 8 is
When the vehicle 1 moves backward with respect to the vehicle, the hook 92 and the lock pin 94r may be disengaged, and the seat body 81 or the like may be separated from the vehicle. SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a vehicle seat including an impact lock mechanism having a structure in which a lock is not easily released when the vehicle is running.

[0006]

The above-mentioned objects are attained by the present invention. The invention according to claim 1 provides a seat body, an elevating mechanism that moves the seat body up and down while moving the seat body in the front-rear direction, and a direction of the seat body by rotating the elevating mechanism and the seat body integrally. A direction changing mechanism for changing the direction of the vehicle, wherein the seat body is lowered to a seating position in a vehicle compartment by the elevating mechanism, and when an impact is applied to the vehicle, the seat is It is characterized by having an impact lock mechanism for connecting the main body and the vehicle so as to be relatively immovable.

According to the present invention, when an impact is applied to the vehicle in a state where the seat body is lowered to a seating position in the passenger compartment by the elevating mechanism, that is, at least in a state where the occupant is seated on the seat body during traveling of the vehicle, The impact lock mechanism operates to lock the seat body and the vehicle so that they cannot move relative to each other. For this reason, for example, even if the vehicle is collided and the seat body tries to move rearward with respect to the vehicle when the vehicle is running, the seat body does not separate from the vehicle due to the function of the impact lock mechanism.

According to a second aspect of the present invention, the shock lock mechanism includes an engaged member provided on the seat body, an engaging member provided on the vehicle side, and a gravity of the seat body lowered to the seating position. When the seat body is lowered to the seating position, the impact lock mechanism can be reliably secured when the seat body is lowered to the seating position. Can work to. In addition, as in claim 3, a part for front collision with which the engaging member comes into contact with the engaged member when the seat body tries to move forward with respect to the vehicle,
If the seat body forms a rear impact portion that the engaging member comes into contact with when the seat body attempts to move rearward with respect to the vehicle, the set of impact lock mechanisms separates the seat body from impact in the front-rear direction. Prevention can be achieved.

Further, when the seat body descends to the seating position along a predetermined locus and further rises from the seating position along a predetermined locus, the engaged member and If the engaged member and the engaging member are engaged when the seat body moves out of the trajectory without engaging with the engaging member, the engagement holding mechanism of claim 2 is unnecessary. become.

According to a fifth aspect of the present invention, the engaging member provided on the vehicle side has a tubular portion, and the engaged member provided on the seat body is hook-shaped by the vertical portion and the horizontal portion. And a lateral portion thereof is inserted into the cylindrical portion of the engaging member, and a claw is formed at a tip of the lateral portion protruding from the cylindrical portion. When the seat body tries to move in the direction in which the lateral portion of the engaged member is pulled out of the shape portion, it is preferable to adopt a structure in which the hook of the engaged member is hooked on the engaging member. In addition, if the cylindrical portion of the engaging member is formed in a tapered cylindrical shape and the lateral portion of the engaged member is formed in a tapered shape so as to be able to be fitted to the cylindrical portion, The play in the fitting state between the tubular portion of the engaging member and the lateral portion of the engaged member can be suppressed.

[0011]

(Embodiment 1) A vehicle seat according to Embodiment 1 of the present invention will be described below with reference to FIGS. 1 to 3 show a vehicle seat 1 according to the present embodiment. The following description will be made with the width direction of the vehicle as the X direction, the front-rear direction of the vehicle as the Y direction, and the height direction of the vehicle as the Z direction. The vehicle seat 1 is a seat used as a driver's seat, and is a seat device 10 mainly including a seat body 11 (hereinafter, referred to as a seat body 10).
And an outdoor moving device 50 installed in the vehicle interior for moving the seat body 10 from the vehicle interior to the outside of the vehicle interior or vice versa, and moving the seat body 10 between the rear seat position and the driver seat position. A long slide device 20 for moving (long slide) a relatively long distance. 2 and 3, the seat body 10 located at the rear seat position is indicated by a solid line, and the seat body 10 located at the driver seat position is indicated by a two-dot chain line. In the case of the present embodiment, the seat body 10
Is the outdoor moving device 5 through the right door opening D2 for the rear seat.
0 moves between the vehicle interior and the vehicle exterior.

The seat body 10 has foldable wheels (not shown) and can be separated from the outdoor moving device 50. By connecting the seat main body 10 to the outdoor moving device 50 and operating the outdoor moving device 50, the seat main body 10 can be moved from the vehicle interior to the vehicle interior, and conversely, from the vehicle exterior to the vehicle interior.
By moving into the cabin, the seat body 10 is used as a driver's seat for a normal driver to sit down, while being moved out of the cabin, separated from the outdoor moving device 50, and the wheel is taken out alone to become a wheelchair. Can be used.

FIG. 4 is a perspective view of the outdoor moving device 50 (the seat body 10 is omitted). The outdoor moving device 50 is installed on the main base 21 of the long slide device 20 installed on the floor F in the vehicle interior. The outdoor moving device 50 includes a direction changing mechanism 50a and a lifting mechanism 5
0b. The direction changing mechanism 50a is mounted on the main base 21 in the vehicle front-rear direction (Y direction) and supported by the short slide rails 51, 51 so as to be movable in the vehicle front-rear direction. Sub-base 52
And a rotation mechanism 53 and a swing base 54 installed on the sub base 52.

The rotating mechanism 53 includes an outer ring 53a and an inner ring 53b rotatably assembled to each other. The inner ring 53b is fixed on the sub base 52, and the outer ring 53a is fixed on the lower surface of the swing base 54. The swing base 54 is supported by the rotation mechanism 53 so as to be rotatable by about 90 ° between the forward direction of the vehicle and the direction toward the vehicle side (the door opening D2 side). The swing base 54 is held at two positions, that is, toward the front of the vehicle and toward the vehicle, by a rotation lock mechanism (not shown).

Between the swing base 54 and the main base 21, although not shown, the swing base 54
Further, an interlocking mechanism for interlocking the rotation operation of the seat body 10 and the short slide operation is interposed. The interlocking mechanism includes a pinion gear portion formed on the outer peripheral surface of the outer ring 53a, an intermediate gear rotatably supported by the sub base 52 and meshing with the pinion gear portion, meshing with the intermediate gear, and a short slide rail 51 on the vehicle interior side. Along with the rack mounted on the main base 21.
Further, a drive gear that is rotated by a rotary motor is meshed with the pinion gear portion. When the rotary motor starts to rotate forward or reverse, the seat body 1 is rotated.
0 rotates toward the front of the vehicle or toward the door opening D2, and short-slides in conjunction with this rotation operation.

On both sides of the swing base 54, a pair of left and right four-bar linkages 55, 55 constituting a lifting mechanism 50b.
The frame 13 of the seat body 10 (not shown) is detachably connected to connection plates 56, 56 of the four-bar linkages 55, 55.

[0017] Both four-link mechanism 55 of the lifting mechanism 50b,
55 includes two link arms 55a and 55b, and lower ends of both front link arms 55a and 55a have support shafts 55d and 55d provided on side walls 54c of the swing base 54.
It is connected rotatably up and down through 55d. On the other hand, between the lower end portions of the rear link arms 55b, 55b, one connecting shaft 57 that rotates with respect to the side wall portion 54c.
And both link arms 55b, 55b are connected to each other through the swing base 54 via the connection shaft 57.
Are connected to be rotatable up and down.

The connecting shaft 57 has a two-joint link mechanism 5
An electric cylinder 59 is connected as a drive source for swinging the 5, 55 to the outside of the room. The electric cylinder 59 is a combination of an electric motor and a screw shaft feed mechanism, and a conventionally known one is used. A pulse motor is used as the electric motor of the electric cylinder 59, and its starting and stopping operations are controlled by a drive circuit of a control device (not shown), whereby the tilting directions of the two four-link mechanisms 55 and 55 are controlled. , The tilting speed and the tilting angle are controlled. Connecting plates 56, 56 are attached to the tips of the two four-bar linkages 55, 55.
The frame 13 of the seat body 10 described above is connected to the seats 6 and 56 in a detachable state.

As shown in FIG. 1, an impact lock mechanism 30 is installed between the frame 13 of the seat body 10 and the main base 21 of the long slide device 20. The impact lock mechanism 30 is a mechanism that holds the seat body 10 at a seating position (the front part of the main base 21) in the vehicle interior, and includes a hook 32 and a pressing member 34 fixed to the frame 13 of the seat body 10, It is composed of an engaging member 42 and a push-up member 44 attached to 21.

The hook 32 is connected to the frame 1 of the seat body 10.
3 and fixed to the rear center of the frame 13. As shown in FIG. 5, the hook 32 has a lock recess 32 e formed in the front lower side thereof, and a lock pin 4 of an engagement member 42 described later in the lock recess 32 e.
2p can be engaged. The pressing member 34 is
When the seat body 10 is lowered to the seating position in the vehicle interior by the outdoor moving device 50, one end (a load receiving plate portion 44b) of a push-up member 44 described later is pressed to push the push-up member 4.
4 is a member for moving the other end (the push-up flat plate portion 44a) upward, and is fixed at a predetermined distance in front of the hook 32.

As shown in FIG. 6, the engaging member 42 has a main flat plate portion 42a and an auxiliary flat plate portion 42b formed with a predetermined thickness.
And a bearing portion 42j disposed between the flat plate portions 42a and 42b. The bearing portion 42j is formed in a cylindrical shape, and the main plate portion 4j is formed on the outer peripheral surface of the bearing portion 42j.
2a and the auxiliary flat plate portion 42b are fixed. here,
An imaginary plane (main plate surface) which is an extension of the main plate portion 42a and a virtual plane (auxiliary plate surface) which is an extension of the auxiliary plate portion 42b intersect at the center of the bearing portion 42j. Is set at an angle α. A rectangular notch 42u through which the above-described hook 32 is passed is formed at the center of the main flat plate portion 42a in the width direction, and a cylindrical lock pin 42p is connected to both sides of the notch 42u. It is provided in parallel with the bearing 42j.

The bearing 42j of the engaging member 42 includes
As shown in (1), the first support shaft 21p installed at the front center of the main base 21 is inserted therethrough. The first support shaft 21p has a height substantially equal to the surface of the main base 21 and is arranged along the width direction (X direction) of the main base 21, and both ends thereof are supported by bearings (not shown). ing. Further, a first opening 21e for accommodating the bearing 42j of the engaging member 42 is formed below the first support shaft 21p in the main base 21.

Accordingly, the engaging member 42 is first supported from the position where the lock pin 42p of the main flat plate portion 42a contacts the surface of the main base 21 to the position where the auxiliary flat plate portion 42b contacts the surface of the main base 21. It becomes possible to rotate about α ° about the axis 21p. That is, the main flat plate portion 42a of the engaging member 42 is rotatable upward by about α ° from a position where it contacts the surface of the main base 21.
The second lock pin 42p engages with the hook 32 of the seat body 10 at the seating position, as shown in FIG.

The push-up member 44 is a member that pushes up the main flat plate portion 42a of the engaging member 42 to a position where the main flat plate portion 42a engages with the hook 32. As shown in FIG. 6, the push-up member 44a has a predetermined thickness. And the load receiving plate part 4 bent in a chevron
4b and a bearing portion 44j disposed between the two plate portions 44a, 44b. The push-up plate portion 44a is a portion that directly pushes up the main plate portion 42a of the engaging member 42, and is disposed below the main plate portion 42a (see FIG. 5). The bearing 44j is formed in a cylindrical shape, and its bearing 4
4j on the outer peripheral surface of the push-up flat plate portion 44a and the load receiving plate portion 44b
Is fixed to the first plate portion 44c. Here, an imaginary plane (a push-up flat surface) that is an extension of the push-up flat plate portion 44a and a virtual plane (a first plate surface) that is an extension of the first plate portion 44c intersect at the center of the bearing portion 44j. The inclination of the first plate surface with respect to the push-up plate surface is set to an angle β. The second plate portion 44d of the load receiving plate portion 44b is formed substantially parallel to the push-up flat plate portion 44a.

As shown in FIG. 5, a second support shaft 21x installed on the main base 21 is inserted into the bearing 44j of the push-up member 44. The second support shaft 21x is installed in front of the first support shaft 21p, and the first support shaft 21x
It is positioned in parallel at approximately the same height as p. Also,
The main base 21 has a second opening 21y formed in the lower front of the second support shaft 21x so as to accommodate the load receiving plate portion 44b of the push-up member 44 and the like. The load receiving plate portion 44b of the push-up member 44 is installed at a position where the seat body 10 is pressed by the pressing member 34 of the seat body 10 when the seat body 10 is lowered to the sitting position by the outdoor moving device 50.

As described above, since the push-up plate portion 44a of the push-up member 44 is disposed below the main plate portion 42a of the engaging member 42, the load receiving plate portion 44b of the push-up member 44 is provided.
Is not receiving the pressing force of the pressing member 34, the push-up plate portion 44a of the push-up member 44 is held in a state of contacting the surface of the main base 21 due to the gravity of the main plate portion 42a, its own weight, and the like. Thereby, the load receiving plate portion 44b of the push-up member 44 is held at a position higher than the surface of the main base 21 (see a two-dot chain line), and the second plate portion 44d of the load receiving plate portion 44b is connected to the main base. 21 is substantially parallel to the surface.

In this state, when the seat body 10 is lowered to the seating position in the vehicle interior by the lifting mechanism 50b of the outdoor moving device 50, the pressing member 34 of the seat body 10 is pushed by a force substantially equal to the gravity of the seat body 10. The load receiving plate portion 44b of the raising member 44 is pressed. Thereby, the push-up member 44
The load receiving plate portion 44b is pushed down to the surface position of the main base 21.
Rotate left around x (leftward in FIG. 5). When the push-up member 44 rotates left about the second support shaft 21x, the push-up plate portion 44a of the push-up member 44 pushes up the main plate portion 42a of the engaging member 42, and the engaging member 42 Rotate clockwise (rotate clockwise in FIG. 5) about the axis 21p. Then, in a state where the push-up member 44 is rotated left by about β ° about the second support shaft 21x, the engaging member 42 is rotated right by about α ° about the first support shaft 21p, and the engagement member 42 The lock pin 42p is hooked on the lock recess 32e of the hook 32.

The elevating mechanism 50b of the outdoor moving device 50
When the seat body 10 starts moving up from the seated position by operating in the ascending direction, the gravity of the seat body 10 is not applied to the load receiving plate portion 44b of the push-up member 44, so that the push-up member 44 is secondarily supported by its own weight. While rotating clockwise about the shaft 21x, the engaging member 42 also rotates counterclockwise about the first support shaft 21p by its own weight, and the lock pin 42p of the engaging member 42 comes off the lock recess 32e of the hook 32. If a first spring (not shown) for applying a left rotation force to the engagement member 42 and a second spring (not shown) for applying a right rotation force to the push-up member 44 are attached, The play between the joining member 42 and the push-up member 44 and the main base 21 is suppressed. That is, the hook 32 of the seat body 10 corresponds to the engaged member of the present invention, and the push-up member 44 of the main base 21 and the pressing member 34 of the seat body 10 correspond to the engagement holding mechanism of the present invention.

Next, the operation of the vehicle seat 1 configured as described above will be described with reference to FIGS. First, the case where the seat body 10 of the vehicle seat 1 is moved from the driver's seat position (the position indicated by the two-dot chain line in FIG. 2) to the outside of the vehicle compartment will be described.
First, the elevating mechanism 50b of the outdoor moving device 50 is driven in the ascending direction, and the two four-bar link mechanisms 55 are erected. As a result, the seat body 10 rises obliquely rearward, and the seat body 10 is held at the upper limit position in the vehicle interior. When the seat body 10 starts rising, the gravity of the seat body 10 is not applied to the load receiving plate portion 44b of the push-up member 44 of the impact lock mechanism 30, so that the push-up member 44 rotates clockwise about the second support shaft 21x. Then, the engaging member 42 rotates counterclockwise about the first support shaft 21p, and the lock pin 42p of the engaging member 42 comes off the lock recess 32e of the hook 32. That is, the locked state of the impact lock mechanism 30 is automatically released when the seat body 10 starts rising.
For this reason, the seat body 10 is
There is no hindrance to the upward movement of the vehicle.

Also, almost simultaneously with the lifting of the seat body 10, the long slide device 20 operates to move the seat body 10 and the outdoor moving device 50 to the rear seat position. This state
This is indicated by a solid line in FIGS. Next, the direction changing mechanism 50a of the outdoor moving device 50 is driven, and the swing base 54, the elevating mechanism 50b, and the seat body 10 are integrally short-slid to the front of the vehicle, and the right door opening D is formed.
Turn right about 90 ° toward 2. When the seat body 10 changes its direction toward the right door opening D2 in this manner, the lifting mechanism 50b is driven in the downward direction, and the two-four-link mechanism 55,
55 swings the seat body 10 forward by about 30 ° in the forward tilt direction. Thus, the seat body 10 is disposed outside the vehicle (see a two-dot chain line in FIG. 3). In this state, the seat body 1
0, a wheel (not shown) is taken out, and the seat body 10 is separated from the outdoor moving device 50,
The seat body 10 can be used alone as a wheelchair.

Next, a case where the seat body 10 is mounted in the vehicle compartment from such a separated state will be described. First, both the seats 10 and 50 are connected while approaching the outdoor moving device 50 with the seat body 10 facing backward. When the connection between the seat body 10 and the outdoor moving device 50 is completed, the lifting / lowering mechanism 50b of the outdoor moving device 50 is driven, and the four-link mechanism 55, 55 is operated.
Operates on the standing side (indoor side). As a result, the seat body 10 rises from the ground, and the wheels of the seat body 10 are folded in this state. After the wheels are folded, the elevating mechanism 50b is driven in the ascending direction again, and the seat body 10 is accommodated in the vehicle interior. Double four-link mechanism 5 of the lifting mechanism 50b
When the seats 5 and 55 stand, the seat body 10 is substantially positioned on the swing base 54.

In this way, the seat body 10 is
4, the direction change mechanism 5 of the outdoor moving device 50
0a is driven, and the seat body 10 and the swing base 5 are driven.
4 and so on turn counterclockwise about 90 ° to the front of the vehicle. At this time, the seat body 10, the swing base 54, and the like are temporarily moved toward the front of the vehicle while short-sliding toward the vehicle rear side by the operation of the rotating device 53 of the direction change mechanism 50a, the short slide rails 51, 51 and the interlocking mechanism. Rotate. Then, with the seat body 10, the swing base 54, and the like returned to a position facing the front of the vehicle, the long slide device 20 is driven, and the seat body 10 and the outdoor moving device 50 move forward toward the driver's seat position. Then, when the seat body 10 reaches the position just before the driver's seat position, the long slide operation is stopped, and the lifting mechanism 50b of the outdoor moving device 50 is driven in the downward direction, and the four-bar linkage mechanism 55, 5
The seat 5 is tilted forward by about 30 °, the seat body 10 is swung forward, and the seat body 10 is lowered to the seating position. Further, the long slide device 20 stops, and the seat body 10 is held at the driver's seat position.

When the seat body 10 is lowered to the seating position by the lifting mechanism 50b of the outdoor moving device 50, as shown in FIG.
The load receiving plate portion 44b of the push-up member 44 constituting the impact lock mechanism 30 is pressed with a force substantially equal to the gravity of zero. As a result, the load receiving plate portion 44b of the push-up member 44 is pushed down to the surface position of the main base 21, and the push-up member 44 rotates counterclockwise (upward rotation) about the second support shaft 21x. When the push-up member 44 rotates upward around the second support shaft 21x, the push-up plate portion 44 of the push-up member 44
a pushes up the main flat plate portion 42a of the engagement member 42,
The engaging member 42 rotates rightward by about α ° about the first support shaft 21p, and the lock pin 42p of the engaging member 42
It is hooked on the second lock recess 32e. That is, the seat body 1
The impact lock mechanism 30 automatically operates in a state in which 0 is lowered to the seating position.

In this state, if the front portion of the vehicle collides with another vehicle or the like (front collision), the seat body 10 is moved by inertia to the vehicle (specifically, the main base 21 connected to the vehicle). Try to move forward. At this time, the lock pin 42p of the engaging member 42 constituting the impact lock mechanism 30 is
As shown in FIG. 7A, the lock recess 32 of the hook 32
e abuts on the rear wall Hb to stop the advancement of the seat body 10 with respect to the vehicle. Therefore, the seat body 10 does not separate from the vehicle during a front collision. When another vehicle or the like collides with the rear portion of the vehicle (rear collision), the seat body 10 tends to move rearward with respect to the vehicle due to inertial force. At this time, as shown in FIG. 7B, the lock pin 42p of the engagement member 42 comes into contact with the front wall Hf of the lock recess 32e of the hook 32, and the retraction of the seat body 10 with respect to the vehicle is stopped. Therefore, the seat body 10 does not separate from the vehicle even in the case of a rear collision. That is, the rear wall Hb of the lock recess 32e corresponds to a front collision portion of the present invention, and the front wall Hf of the lock recess 32e corresponds to a rear collision portion of the present invention. Note that FIG.
The two-dot chain line in (B) is a schematic position of the hook 32 and the like in a state where no impact is applied.

As described above, in the vehicle seat 1 according to the present embodiment, the impact lock mechanism 30 operates in a state where the seat body 10 is lowered to the seating position in the vehicle interior.
The seat body 10 does not leave the vehicle even if the vehicle collides forward or backward. Further, when the push-up member 44 constituting the impact lock mechanism 30 receives a force equal to the gravity of the seat body 10 via the pressing member 34, the engaging member 42
The lock pin 42p is engaged with the lock recess 32e of the hook 32, so that the impact lock mechanism 30 can be reliably operated when the seat body 10 is lowered to the seating position.

Further, since the impact lock in the front-rear direction can be performed by the pair of the engaging members 42 and the hooks 32, the structure is simplified and the cost is advantageous. In addition, if the impact lock mechanism 30 is also installed in the width direction of the vehicle, the detachment of the seat body 10 against impact from the side of the vehicle can be prevented. In the present embodiment, the shock lock mechanism 30
Although the example in which the first support shaft 21p and the second support shaft 21x are provided on the main base 21 has been described, it is also possible to provide them below the main base 21 as shown in FIG. Further, in the present embodiment, the hook 32 of the impact lock mechanism 30 is used.
Is shown at the center of the rear part of the frame 13 of the seat body 10, but if the hooks 32 are provided on both sides of the rear part of the frame 13 (two pieces), the seat body 10 may be provided at the time of impact.
Can be prevented from rotating in the horizontal direction.

As described above, when two hooks 32 are provided in the width direction of the frame 13, it is necessary to change the shape of the engaging member 42 which engages with the hook 32 in accordance with the hook 32. FIG. 9 is a perspective view of an engagement member 42 used when two hooks 32 are installed in the width direction of the frame 13. At both ends in the width direction of the engaging member 42, a rectangular notch 42u through which each hook 32 passes is formed, and an engaging plate 42p that engages with the hook 32 is formed at the tip of the notch 42u. I have. Note that the above-described lock pin 42p can be used instead of the engagement plate 42p. Thus, the hook 32 is connected to the frame 1
3 shock-locking mechanism 30 having two structures in the width direction
As shown in FIG. 10, as shown in FIG.
2 by pushing up the engagement plate 42p of the engagement member 42.
Is engaged with the hook 32, and the operation principle is exactly the same as that of the shock lock mechanism 30 shown in FIG.

Embodiment 2 Hereinafter, a vehicle seat according to Embodiment 2 of the present invention will be described with reference to FIGS. The vehicle seat 70 according to the present embodiment is a modification of the impact lock mechanism 30 of the vehicle seat 1 according to the first embodiment, and the other structure is the same as the vehicle seat 1 according to the first embodiment. . Therefore, the same members as those of the vehicle seat 1 according to the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. The impact locking mechanism 71 of the vehicle seat 70 according to the present embodiment includes an insertion hook 72 fixed to the frame 13 of the seat body 10 and the main base 2.
1 and a hook retainer 76 attached to the hook holder 1.

The insertable hook 72 is fixed below the frame 13 of the seat body 10 and at the front center of the frame 13. The insertion type hook 72 has a rectangular column-shaped vertical portion 7.
4 and a substantially pyramid-shaped horizontal portion 75 are formed in a hook shape, and an upper claw 75f is formed at the tip of the horizontal portion 75. The hook retainer 76 is provided on the side 75 of the insertion type hook 72.
Is a tubular member to be inserted, and is fixed to the front center of the main base 21. The hook retainer 76 is formed in a tapered shape in conformity with the shape of the lateral portion 75 of the insertion type hook 72, and the length of the hook retainer 76 in the axial direction is such that the distal end portion of the lateral portion 75 of the insertable hook 72 is formed. The length is set so that it can protrude.

The inner width of the hook retainer 76 is set substantially equal to the outer width of the lateral portion 75 of the insertion hook 72 (see FIG. 11C). For this reason, in a state where the lateral portion 75 of the insertion type hook 72 is inserted into the hook retainer 76,
The outer wall surface of the lateral portion 75 is almost in contact with the inner wall surface of the hook retainer 76, and the insertion type hook 72 is inserted into the hook retainer 76.
Lateral backlash and lateral impact lock on the vehicle can be achieved.

The height of the rear end of the hook retainer 76 is such that the seat body 10 can be moved up and down by the lifting mechanism 50 b of the outdoor moving device 50.
When descending to the seating position following a predetermined locus by the action of
Is set to a value that does not collide with the rear end face 76b. The height dimension of the front end of the hook retainer 76 is the seat body 1.
When 0 rises from the seating position following a predetermined trajectory by the function of the elevating mechanism 50b of the outdoor moving device 50, the upper claw 75f of the insertion type hook 72 is set to a value that does not catch on the tip end surface 76e of the hook retainer 76. Is set. Therefore, the impact lock mechanism 71 does not hinder the operation of the outdoor moving device 50.

However, when the seat body 10 is in the seating position and the vehicle is going forward and the seat body 10 moves forward, as shown in FIG.
The front surface 74k of the vertical portion 74 of the insertable hook 72 abuts the rear end surface 76b of the seat 6 to stop the advancement of the seat body 10 with respect to the vehicle. Therefore, the seat body 10 does not separate from the vehicle during a front collision. In addition, when the vehicle rear-collides with the seat body 10 in the seating position and the seat body 10 tries to move rearward, the movement of the seat body 10 deviates from a predetermined locus. As shown in
The upper hook 75f of the lateral portion 75 of the insertable hook 72 is hooked on the front end surface 76f of the hook retainer 76, and the retreat of the seat body 10 with respect to the vehicle is stopped. Therefore, the seat body 10 does not separate from the vehicle during a rear collision. That is, the insertion type hook 72 corresponds to the engaged member of the present invention,
6 corresponds to the engaging member of the present invention.

As described above, in the vehicle seat 70 according to the present embodiment, the seat body 10 descends to the seating position on the predetermined locus in the vehicle interior, and the seat body 10 further moves down to the seating position on the predetermined locus. When ascending, the insertion hook 72 and the hook retainer 76 do not engage with each other. However, when an impact is applied to the vehicle and the seat body 10 moves out of the trajectory, the insertion hook 72 and the hook retainer 7 move.
6, the seat body 10 is held immovably with respect to the vehicle. For this reason, the engagement holding mechanism used in the first embodiment becomes unnecessary.

Further, the hook retainer 76 is formed in a tapered cylindrical shape, and the lateral portion 75 of the insertion type hook 72 is attached to the hook retainer 76.
Since it is formed in a tapered shape so that it can be fitted to the hook, it is possible to suppress play in the fitted state of the insertion type hook 72 and the hook retainer 76, and it is possible to apply a lateral impact lock.

Incidentally, In the vehicle seats 1 and 70 according to the first and second embodiments, the vehicle seat having the device 20 for long-sliding the seat body 10 in the front-rear direction of the vehicle has been described as an example. It is also possible to apply the present invention to vehicle seats that do not.

[0046]

According to the present invention, when an impact is applied to the vehicle while the occupant is seated at least while the vehicle is running, the impact lock mechanism operates to lock the seat body and the vehicle so that they cannot move relative to each other. For this reason, for example, even if the vehicle is collided during traveling of the vehicle and the seat body tries to move backward with respect to the vehicle, the seat body does not separate from the vehicle.

[Brief description of the drawings]

FIG. 1 is a side view of a vehicle seat according to Embodiment 1 of the present invention, showing a state in which an impact lock mechanism is not working (FIG. A) and a view showing a state in which an impact lock mechanism is working. (FIG. B).

FIG. 2 is a side view showing a state in which the seat body of the vehicle seat according to the first embodiment of the present invention is moved from the outside of the vehicle compartment to the rear seat position of the vehicle compartment, and then long-slid to the rear driver seat position. I have.

FIG. 3 is a plan view showing a state in which the seat body of the vehicle seat according to the first embodiment of the present invention is moved from the outside of the vehicle compartment to the rear seat position of the vehicle compartment and then long-slid to the rear driver seat position. I have.

FIG. 4 is a perspective view of the vehicle seat outdoor moving device according to the first embodiment of the present invention.

FIG. 5 is a side view of the impact lock mechanism for the vehicle seat according to the first embodiment of the present invention.

FIG. 6 is a perspective view of a main part of an impact lock mechanism.

FIG. 7 is a side view (A) showing a state of the impact lock mechanism at the time of a front collision, and a side view (B) showing a state of a rear collision at the time of the impact lock mechanism.

FIG. 8 is a side view illustrating a modified example of the impact lock mechanism.

FIG. 9 is a perspective view illustrating a modified example of the impact lock mechanism.

FIG. 10 is a side view illustrating a modified example of the impact lock mechanism.

11 is a side view of a vehicle seat according to a second embodiment of the present invention (FIG. A), a side view of an impact lock mechanism (FIG. B), and a plan view of the impact lock mechanism (FIG. C).

FIG. 12 is a side view (A) showing a state of the impact lock mechanism at the time of a front collision, and a side view (B) showing a state of a rear collision at the time of the impact lock mechanism.

FIG. 13 is a side view (FIG. A) of a conventional vehicle seat and a perspective view (B) showing an arrangement of an impact lock mechanism.

FIG. 14 is a detailed view of a conventional impact lock mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vehicle seat 10 Seat main body 30 Shock lock mechanism 32 Hook (engaged member) 34 Pressing member (engagement holding mechanism) 42 Engaging member 42p Lock pin 44 Push-up member (engagement holding mechanism) 50 Outdoor moving device 50a Direction change mechanism 50b Elevating mechanism 72 Insertion hook (engaged member) 74 Vertical part 75 Horizontal part 75f Upper claw 76 Hook retainer (engagement member)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shoichi Kawatahara 395-1, Uenodan, Kokubu, Kagoshima Inside Toyota Auto Body Research Laboratories Co., Ltd. (72) Inventor Yoshiyuki Miura 100 Kanayama, Ichiriyama-cho, Kariya-shi, Aichi F-term (reference) 3B087 AA02 BA02 BA07 BA15 BB07 BB14 BB25 CD02

Claims (6)

[Claims] 1. A seat body, an elevating mechanism for moving the seat body up and down while moving the seat body in the front-rear direction of the seat body, and changing the direction of the seat body by rotating the elevating mechanism and the seat body together. A vehicle seat including a direction change mechanism, wherein the seat body is lowered to a seating position in a vehicle interior by the elevating mechanism, and when an impact is applied to the vehicle, the seat body and A vehicle seat having an impact lock mechanism for connecting a vehicle so as to be relatively immovable. 2. The vehicle seat according to claim 1, wherein the impact lock mechanism includes an engaged member provided on the seat body, an engaging member provided on the vehicle side, and lowered to a seating position. An engagement holding mechanism for holding the engagement member and the engaged member in an engaged state when the seat body is under gravity. 3. The vehicle seat according to claim 2, wherein the engaged member includes a front collision portion with which the engaging member abuts when the seat body attempts to move forward with respect to the vehicle. A vehicle seat, wherein a rear impact portion is formed with which the engaging member comes into contact when the seat body is to move rearward with respect to the vehicle. 4. The vehicle seat according to claim 1, wherein the impact lock mechanism includes an engaged member provided on the seat body, and an engaging member provided on the vehicle side. When the seat body moves up and down along a predetermined locus by the function of the elevating mechanism, the engaged member and the engaging member do not engage with each other, and when the seat body moves off the locus due to impact. A vehicle seat having a structure in which the engaged member and the engaging member are engaged with each other. 5. The vehicle seat according to claim 4, wherein the engagement member provided on the vehicle side has a tubular portion, and the engaged member provided on the seat body has a vertical portion and a horizontal portion. A hook is formed by the portion, the lateral portion is a structure to be inserted into the tubular portion of the engaging member, and a claw is formed at the tip of the lateral portion protruding from the tubular portion, When the seat body tries to move in a direction in which a lateral portion of the engaged member is pulled out of the tubular portion of the engaging member by an impact,
A vehicle seat having a structure in which a hook of the engaged member is hooked on the engaging member. 6. The vehicle seat according to claim 5, wherein the tubular portion of the engaging member is formed in a tapered tubular shape, and a lateral portion of the engaged member can be fitted to the tubular portion. A vehicle seat having a tapered shape.