JP3127901B2 - Vehicle lift-up seat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lift-up seat for a vehicle that enables a disabled person or an elderly person (hereinafter simply referred to as a "seat person") to easily get on and off a vehicle.

[0002]

2. Description of the Related Art The applicant of the present application discloses a seat apparatus having a seat body and front and rear wheels that can be folded, and a seat apparatus installed in a vehicle cabin. A lift-up device for moving the device between the vehicle interior and the exterior of the vehicle interior, wherein the lift-up device allows the seat device to be moved into the vehicle interior to use the seat device as a seat for the vehicle interior; and A vehicle lift-up seat in which the seat device is moved out of the vehicle compartment by the lift-up device and then separated from the lift-up device so that the seat device can be used alone as a wheelchair has been invented.

According to this vehicle lift-up seat,
Since the occupant can get on the vehicle while sitting on the seat device, and after coming out of the room while sitting in the vehicle interior, the seat device can be separated from the lift-up device and used as a normal wheelchair, The occupant does not need to perform any transfer operation between the vehicle interior seat and the wheelchair, so that the burden on the occupant and his / her caregiver can be greatly reduced. Further, according to this lift-up seat for a vehicle, since the front and rear wheels of the seat device are foldable along the lower surface of the seat body, the occupant gets into the vehicle interior with the seat device while sitting on the seat device. At this time, by folding the front and rear wheels along the lower surface of the seat body, the occupant can sit at substantially the same height as the fellow passenger in the vehicle cabin, thereby giving the occupant special emotions (for example, I was able to sit down without feeling alienated (like being treated specially).

[0004]

However, there has been a need to further improve the above-mentioned vehicle lift-up seat. In other words, since the front and rear wheels of the seat device are configured to be separately folded, it is troublesome in this respect. The present invention has been made in view of this problem, and has as its object to provide a vehicle lift-up seat that can fold the front and rear wheels with one touch.

[0005]

According to a first aspect of the present invention, there is provided a lift-up seat for a vehicle, comprising: a seat body having a seat body and front and rear wheels that can be folded while a seated person is seated on the seat body. A lift-up device installed in the vehicle interior for connecting the seat device and moving the seat device between the vehicle interior and the exterior of the vehicle interior while maintaining the seating posture of the seat body; Is
A vehicle lift-up seat configured to move into the vehicle cabin and be usable as a seat for the vehicle cabin, and to move out of the vehicle cabin and to be separated from the lift-up device and used alone as a wheelchair . Before turning
It has a wheel stay and a rear wheel stay that rotates forward,
The front and rear wheels are rotated by rotating the wheel stay and the rear wheel stay.
Foldable upwards and pivots up and down on the front wheel stay
Support the front link arm as much as possible, and
The rear link arm is supported so that it can rotate
And the front link
The upward rotation of the arm with respect to the front wheel stay
Provide a stopper that regulates the angle of the rear wheel stay.
The front wheel stay is configured to rotate in conjunction with the movement . According to the vehicle lift-up seat, the folding operation of the front wheels is performed.
Is performed in conjunction with the folding operation of the rear wheel,
When the folding operation is performed, the front wheels are also folded in conjunction with each other, so that the operation of the vehicle lift-up seat can be simplified.

A vehicle lift-up seat according to a second aspect is the vehicle lift-up seat according to the first aspect, wherein the front wheel is supported so as to be swingable, and the front wheel is moved from a vertical position in conjunction with a folding operation. The posture was changed to the horizontal posture. According to this vehicle lift-up seat, the front wheels can be stored more compactly in the height direction, so that the seat device can be installed in the vehicle cabin at substantially the same height as other seats. Thereby, a special feeling such as a feeling of alienation in the passenger compartment of the seated person can be eliminated. Here, the vertical posture of the front wheel refers to a posture in which the rotation axis (axle) is along the horizontal direction (parallel to the ground) during the folding operation of the front wheel, and the lateral posture is the completion of the folding operation of the front wheel. It refers to a posture in which the rotation axis is aligned in a vertical direction (a direction orthogonal to the ground) at a point in time.

[0007]

FIG. 1 shows an embodiment of the present invention.
This will be described with reference to FIG. FIG. 1 shows a vehicle lift-up seat 1 according to the present embodiment. The vehicle lift-up seat 1 includes a seat device 10 and a lift-up device 50 that can be used alone as a wheelchair. The seat device 10 is connected to the lift-up device 50, and the seat device 10 is operated by the operation of the lift-up device 50.
Can be moved from the vehicle interior to the vehicle exterior, and conversely from the vehicle exterior to the vehicle interior. The seat device 10 is used as a normal vehicle seat in the vehicle interior, and is separated from the lift-up device 50 outside the vehicle interior. Can be used alone as a wheelchair.

The seat device 10 includes a seat cushion 11.
a, a seat body 11 having a seat back 11b, a substantially L-shaped seat frame 20 for receiving the seat body 11 and a substantially L-shaped seat frame attached along the left and right sides of the seat frame 20 Cover body 30,
30. However, in FIGS.
Illustrations of 0 and 30 are omitted. Seat frame 20
The footrest 21 is attached to the front of the vehicle through a U-shaped support arm 22. On the lower surface of the seat frame 20, front and rear wheels 60, 60, 70, 7
0 is provided. The front and rear wheels 60, 60, 70, 70 are configured to be foldable in conjunction with each other. Hereinafter, the support structure of the front and rear wheels 60, 60, 70, 70 will be described.

Fixed pillars 61 are attached to both ends 22a of the support arm 22 to which the footrest 21 is attached.
Are attached downward, and both fixed columns 6
A front wheel stay 63 is attached to the first and first wheels 61 through hinges 62 so as to be rotatable upward. Brackets 64 are attached to lower ends of the front wheel stays 63, 63 so as to be rotatable around the axes of the front wheel stays 63, 63, respectively. The front wheels 60 are rotatably supported by the brackets 64, 64, respectively. I have. From this,
At the lower ends of the front wheel stays 63, so-called swivel casters that can swing right and left are attached. Therefore, the mounting position of the front wheel 60 with respect to the bracket 64 is set such that the center of gravity of the front wheel 60 is eccentric with respect to the rotation axis (the steering shaft and the caster shaft) of the bracket 64 with respect to the front wheel stay 63. Both brackets 6
4, 64, the front wheels 60,
When folding the front wheel 60 to the lower surface of the seat frame 20, the engagement pins 65, 65 for forcibly bringing the front wheels 60, 60 to the horizontal position are respectively attached in a projecting manner to the side. The two front wheel stays 63, 63 are connected left and right via a connecting rod 66 and rotate integrally up and down. Therefore, the left and right front wheels 60, 60 are integrally housed upward and taken out downward. When the front wheel stays 63 are pivoted upward, the front wheels 60 are housed on the lower surface of the seat cushion 11a in a lateral posture as described later.

Next, a pair of left and right rear wheel stays 71, 71 are provided at the rear portion of the lower surface of the seat frame 20, respectively.
A rear wheel 70 is rotatably attached to lower ends of both rear wheel stays 71, 71 via a 1a. Both rear wheel stays 71, 7
1 is also connected to the left and right by the connecting rod 72 and integrally rotates in the up-down direction. Therefore, the rear wheels 70 are also integrally housed upward and taken out downward. Rear wheel stay 7
When the first wheel 71 is rotated upward, the two rear wheels 70 are housed in the cover bodies 30.

A front end of a front link arm 67 is supported at a longitudinal center of a connecting rod 66 for connecting the left and right front wheel stays 63, 63 via a support shaft 67a so as to be vertically rotatable. A stopper 66a is attached near the base of the front link arm 67. When the front link arm 67 rotates upward by about 90 ° and stands almost vertically, the stopper 66a comes into contact with the base of the front link arm 67 from the front side. Rotation is regulated. The effect of restricting the rotation of the front link arm 67 will be described later. On the other hand, both rear wheel stays 71, 71
The rear end of a rear link arm 73 is supported at the center in the longitudinal direction of the connecting rod 72 for connecting the same through a support shaft 73a so as to be rotatable up and down.

The front and rear link arms 67 and 73 are connected via a folding lock mechanism 80 described below. Details of the folding lock mechanism 80 are shown in FIGS.
2 is shown. As shown, the front link arm 6
The rear end 7 and the front end of the rear link arm 73 are connected to each other via a support shaft 81 so as to be rotatable up and down. At the rear end of the front link arm 67, a lock arm 8 is connected via a support shaft 83.
2 is rotatably supported up and down. The lock arm 82 is urged in the lock direction (clockwise direction in the figure) by a tension spring 85. However, as shown in FIG. 9, the rotation range of the lock arm 82 in the clockwise direction in the drawing (the rotation end on the lock side) is restricted to a fixed position by the stopper pin 87. A lock release lever 84 for unlocking operation is provided below the lock arm 82. On the other hand, a substantially hook-shaped lock claw 82a is provided at the tip of the lock arm 82.
Is formed with an arc-shaped portion 82b on the upper edge and a linear portion 82c on the lower edge. In the rear link arm 73,
An engagement edge 73b is formed along the upper edge of the front side in the drawing to project in a substantially L-shape.

The folding lock mechanism 8 constructed as described above.
According to 0, when the lock arm 82 is not released as shown in FIG. 12, the front and rear link arms 67 and 73 are locked in a state where they are both horizontal and straight.
As a result, the front and rear wheels 60, 60, 70, 70 can be locked in the removal state. On the other hand, when the lock arm 82 is released as shown in FIG. 9, the front and rear link arms 67 and 73 are mutually rotatable about the support shaft 81, and thereby the front and rear wheels 60, 60, 70, 70
Can be folded. Furthermore, the front and rear wheels 60, 60,
9 and 1 are taken out of the folded state.
The lock arm 82 automatically returns to the locked state through the state shown in FIG. 1, and thereby the front and rear wheels 60, 60, 70, 7
0 is locked in the take-out state (the state of FIG. 12).

The stage shown in FIG. 9 is a stage in which the front link arm 67 and the rear link arm 73 can rotate about the support shaft 81 without any restriction. In this stage, the lock release lever 84 ( The lock arm 82) is held at the rotation end position on the lock side by the tension spring 85 and the stopper pin 87. The stage shown in FIG. 10 shows a stage in which the front link arm 67 and the rear link arm 73 are still slightly rotated about the support shaft 81.
At this stage, the engaging edge 73b of the rear link arm 73 starts pressing the arc-shaped portion 82b of the lock claw 82a of the lock arm 82 from above, whereby the lock arm 82 counterclockwise in the drawing against the tension spring 85. It rotates in the direction (unlocking direction) and is separated from the stopper pin 87.

Thus, the two link arms 67 and 73 rotate relative to each other while rotating the lock arm 82 in the unlocking direction against the tension spring 85. Lock arm 82
The rotation in the unlock direction is continued until the engagement edge 73b of the rear link arm 73 reaches the tip of the arc-shaped portion 82b of the lock claw 82a as shown in FIG. Further, when the two link arms 67 and 73 are mutually rotated to reach a stage where the two link arms 67 and 73 are aligned in a substantially horizontal state and straight, the engaging edge 73b of the rear link arm 73 becomes the arc-shaped portion. It comes off from the tip of 82b. Then, since the lock arm 82 is returned in the clockwise direction (locking direction) in the figure by the tension spring 85, the lock claw 82a moves above the engagement edge 73b, whereby the linear portion 82c is moved to the engagement edge 73c. 73b is superposed from the upper side. In this state, since the link arms 67 and 73 cannot rotate with each other, the front wheel stay 63 and the rear wheel stay 71 cannot rotate with each other.
60 and the rear wheels 70 are locked at the take-out position. FIG. 12 shows this locked state.

Next, the support arm 22 to which the footrest 2 is attached has a front wheel take-out lock mechanism 90 for more securely locking the state in which the front wheels 60 are taken out.
Is provided. The details of the front wheel take-out lock mechanism 90 are shown in FIG. That is, the support arm 22
A pair of left and right lock arms 92, 92 are provided between the left and right end portions 22a, 22a so as to be vertically rotatable about a support bar 91 as a rotation axis. Both lock arms 92, 92
The rotation base end is fixed at a fixed interval by the support bar 91, while the rotation tip is also fixed at the same interval by the connection bar 93 and is fixed in parallel to each other, and is integrally turned up and down. Move. The lock arms 92, 92 have semicircular lock recesses 92a,
a is formed so as to open downward. The left and right front wheel stays 6 correspond to the lock recesses 92a, 92a.
A lock bar 63a is fixed between the members 3 and 63.

According to the front wheel take-out lock mechanism 90 constructed as described above, both lock arms 92,
The lock recesses 92a, 92a
If the lock bar 63a is fitted inside, the front wheel stay 6
3, 63, and thus the front wheels 60, 60 are locked in the removal state. On the other hand, when the two lock arms 92, 92 are turned upward to remove the lock bar 63a from the inside of the lock recesses 92a, 92a, the front wheel stays 63, 63
It can be pivoted upward through 2 and 62.

Next, the swing mechanism 97 of the front wheels 60, 60 will be described. As described above, the brackets 64, 64 for rotatably supporting the front wheels 60, 60 are provided on the front wheel stays 6, respectively.
3 is rotatably mounted on the lower part of the
Engagement pins 65 are attached to the outer surfaces of the four and 64, respectively, so as to protrude laterally. 13 and FIG.
As shown in FIG. 4, regulating plates 96 are attached to both sides of the seat frame 20 so as to project downward. According to the swing mechanism 97, the front and rear wheels 60, 6
The front wheels 60, 6 are linked with the folding operation of 0, 70, 70.
The storage position of 0 is forcibly changed from the vertical position to the horizontal position. This will be described later.

Next, the left and right cover bodies 30, 30 have:
As shown in FIG. 1, a rising portion 30b is provided along a side portion of the seat back 11b, and functions inside the rising portion 30b when connecting the seat device 10 to the lift-up device 50. Connection recess 40
Is provided. 6 and 7 show the internal structure of the cover 30. FIG. The two connecting recesses 40, 40 are integrally formed on the side surface of the seat frame 20 and each have a vertically long curved shape and a U-shaped cross section that opens rearward as shown in FIG. ing. Above the coupling recesses 40, 40, there is provided a hooking recess 40b formed with a folded portion 40a and opened downward. The connection plates 56 of the lift-up device 50 are fitted into the connection recesses 40, 40, respectively, whereby the seat device 10 is connected to the lift-up device 50. Details on this point will be described later.

Next, as shown in FIGS. 2 to 4, on both sides of the seat frame 20 and below the connecting recess 40, a lift-up device 50 for the seat device 10 is provided.
A lock bar 45 for keeping the connection state of the lock is attached. The two lock bars 45 are supported by a holding bracket 46 so as to be vertically movable. At the lower ends of both lock bars 45, 45,
Guide rollers 48 via respective holding blocks 47
Is rotatably mounted. Since a compression spring 49 is interposed between the holding block 47 and the bracket 46, the lock bar 45 is urged downward. When the rear wheel 70 is folded, the lock bar 4
A cam plate 75 is provided on the rear wheel stay 71 for moving the lock bar 45 upward by contacting a guide roller 48 provided at the lower end of the rear wheel 5. 5 and 7
As shown in FIG.
A block body 76 having a lock hole 76a into which the upper end of the lock bar 45 can be inserted is attached to a lower part of the lock bar 45. FIG. 5 shows only one block body 76.

According to this construction, the cam plate 75 is separated from the guide roller 48 of the lock bar 46 when the rear wheels 60 are taken out by rotating the rear wheel stay 71 downward as shown in FIG. The lock bar 46
Is located at the lowest position (unlock position). In this state, if the seat device 10 is retracted and the connecting plates 56 and 56 are respectively inserted into the connecting recesses 40, and then the lift-up device 50 is operated to slightly move the connecting plate 56, The upper end 56c is inserted into the hooking recess 40b, so that the rearward displacement is restricted.

After the upper end portion 56c of the connecting plate 56 is hooked and inserted into the concave portion 40b, the front and rear wheels 60, 60, 70, 70 of the seat device 10 are lifted by further operating the lift-up device 50 toward the indoor side. In this state, the front and rear wheels 60, 60, 70, 70 are stored in the cover body 30. At this time, the rear wheel stays 71, 71 are stored in the storage direction (upward).
The cam plate 7 during the rotation process.
5 moves upward integrally. As shown in FIG. 3, when the rear wheel stays 71, 71 are rotated by about 45 °, the guide roller 48 abuts on the cam surface 75a of the cam plate 75, and the rear wheel stay 71 is further rotated upward. Since the lock bar 45 is pushed by the cam plate 75 via the guide roller 48, the lock bar 45 moves upward against the compression spring 49. As shown in FIG. 4, when the rear wheel stay 71 is rotated until the front and rear wheels 60, 60, 70, 70 are completely housed, the cam surface 75a is displaced to the highest position. Reaches the upper end, and its upper end is inserted into the lock hole 76a of the block body 76.

The upper end of the lock bar 45 is a block 76
When the lock plate 76 is inserted into the lock hole 76a, the rearward displacement of the lower end portion of the connecting plate 56 (the rightward displacement in FIGS. 2 to 4) is regulated, whereby the connecting plate 56 is fixed in the connecting recess 40. Is done. Thereafter, as described later, the lift-up device 50
By operating, the seat device 10 can be moved to a predetermined position in the room. Conversely, if the seat device 10 is moved out of the cabin and the rear wheels 70, 70 are taken out, the cam surface 75a is displaced to a relatively low position, so that the lock bar 45 is moved downward by the compression spring 49. As a result, the upper end of the lock bar 45 is
a and the lower end of the connecting plate 56 is unlocked. As described above, the lower ends of the connecting plates 56, 56 are locked and unlocked by moving the lock bars 45, 45 up and down in conjunction with the storing / removing operation of the front and rear wheels 60, 60, 70, 70, and thus the seat device. Locking and unlocking of the connected state of the lift-up device 50 with respect to 10 is automatically performed.

Next, the lift-up device 50 provided in the vehicle compartment will be described. This lift-up device 50
As shown in FIG. 5, a main base 52 movable in the front-rear direction of the vehicle via slide rails 51, 51 installed on a floor F in a vehicle compartment, a rotating disk 53 mounted on the main base 52, The swing base 54 includes a swing base 54 and a pair of left and right four-bar linkages 55 and 55 attached to both sides of the swing base 54. In the present embodiment, no special driving means for moving the main base 52 in the front-rear direction is provided, and therefore, the moving operation is performed by a manual operation. The position of the main base 52 in the vehicle longitudinal direction can be locked at an arbitrary position by a slide lock mechanism not shown. Note that the main base 52 may be electrically driven by, for example, a sliding mechanism that combines a motor and a rack and pinion.

The turntable 53 has an inner race 53a and an outer race 53b rotatably assembled to each other. The outer race 53b is fixed on the main base 52, and the inner race 53a is fixed to the lower surface of the swing base 54. The rotating base 53 supports the swing base 54 so as to be rotatable by about 90 degrees between the front direction of the vehicle and the direction toward the vehicle (the door opening D side, see FIG. 1). 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). or,
Although not shown, an interlocking mechanism is interposed between the swing base 54 and the vehicle floor F to interlock the rotation of the swing base 54 and the sliding operation in the vehicle front-rear direction. This interlocking mechanism includes an arc-shaped pinion gear attached to the lower surface of a swing base 54, an intermediate gear rotatably supported by the main base 52 and meshing with the pinion gear, and a slide rail 51 on the vehicle compartment side on the floor F. And a rack engaged with the intermediate gear.

Next, each of the four-joint link mechanisms 55, 55 has two link arms 55a, 55b, and the lower ends of the front link arms 55a, 55a have support shafts 55c, 55c, respectively.
It is rotatably connected to the side of the swing base 54 up and down through 55c. On the other hand, the lower ends of the two link arms 55b, 55b on the rear side are integrally connected by one connecting shaft 57, and the two link arms 55b, 55b are connected to the swing base 54 via the connecting shaft 57. Are connected so as to be rotatable up and down. The connecting shaft 5
7, an electric cylinder 95 is connected as a drive source for swinging the four-bar linkages 55, 55 to the outside of the room.

The connecting plates 56 described above are attached to the tips of the two four-bar linkages 55, 55, respectively. The front and rear link arms 55 with respect to the two connecting plates 56,56.
a and 55b are rotatably connected via support shafts 56a and 56b. As shown in FIGS. 6 and 7, both connecting plates 56, 56 are connected to the connecting recesses 40 of the seat device 10, respectively.
The upper end portion 56c has a shape that can be fitted into the hooking concave portion 40b of the coupling concave portion 40 without any gap. When the upper end 56c of the connecting plate 56 is fitted into the hooking recess 40b, the direction in which the upper end 56c comes off (to the right in FIG. 4).
Is prevented by the folded portion 40a. As described above, the block bodies 76 for inserting the upper ends of the lock bars 45 are attached to the lower portions of the outer side surfaces of the connecting plates 56, 56, respectively. The lift-up device 50 thus configured is connected to or disconnected from the seat device 10 as described below. While the following operation is performed, the occupant holds the seat body 11.
The user can move to a predetermined position in the vehicle compartment while sitting.

FIG. 1 shows a state where the seat device 10 is separated from the lift-up device 50. At this time, both four-bar linkages 55 of the lift-up device 50 are in a state of being tilted to the swing-out side as shown in the figure. On the other hand, in the seat device 10, the front wheels 60, 60 and the rear wheels 70, 70 are taken out downward, and
0 can be used alone, that is, used to travel on the street as a normal wheelchair. That is, FIG.
As shown in FIG. 12, when both link arms 67 and 73 are in a substantially horizontal state and in a straight line, the lock claw 82a of the lock arm 82 is superimposed on the engagement edge 73b of the rear link arm 73 from above. In this state, both link arms 67 and 73 are locked so as not to rotate, and thus the front and rear wheels 60, 60, 70 and 70 are locked in the removal state. Front and rear wheels 60,
With 60, 70, 70 locked in the take-out position,
The seat device 10 can be used alone as a normal wheelchair. In order to connect the seat device 10 to the lift-up device 50 from such a state, the seat device 10 is moved rearward to approach the lift-up device 50,
The two connecting plates 56 of the lift-up device 50 are fitted into the connecting recesses 40 of the seat device 10. After that, the electric cylinder 95 is activated (reversed) to the upright side to move the two four-bar linkages 55, 55 slightly in the upright direction, so that the upper end portions 56c of the two coupling plates 56, 56 are connected to the coupling recess 40. , 40 into the hooking recesses 40b, 40b.

The electric cylinder 95 is further rotated in the reverse direction, so that the two four-bar linkages 55, 55 are set up (indoor side).
, The sheet device 10 is lifted off the ground. At this stage, the lift-up device 50 is temporarily stopped. By setting the seat device 10 up above the ground, the front wheels 60, 60 and the rear wheels 70, 70 can be folded in the procedure described below. First, the lock release lever 84 is gripped and the lock arm 82 is rotated counterclockwise in FIG. 2 to release the folding lock mechanism 80. When the folding lock mechanism 80 is released, the front link arm 67 and the rear link arm 73 can be turned around the support shafts 67a and 73a, respectively. Therefore, first, as shown in FIG. 3, when the rear wheel stays 71, 71 are rotated upward about the support shaft 71a, the front link arm 67 and the rear link arm 73 relatively rotate via the support shaft 81. Then, both arms 67 and 73 move in the direction in which they become upwardly convex. When the rear wheel stays 71, 71 are rotated by about 45 °, the front link arm 67 is rotated upward by about 90 °, and becomes substantially upright. The rotation of the front link arm 67 about the support shaft 67a ends at this stage. At this stage, the front link arm 67 only rotates upward via the support shaft 67a,
Therefore, the front wheel stay 63 and the front wheel 60 do not move. As shown in FIG. 9, when the lock release lever 84 is unlocked and the link arms 67 and 73 are rotated to some extent, the rotation of the lock release lever 84 may be released. The lock release lever 84 is connected to the tension spring 8.
5 and the stopper pin 87 are held at the rotation end position on the lock side.

When the rear wheel stay 71 is rotated upward by about 45 °, the guide roller 48 abuts against the cam surface 75a of the cam plate 75 integrally attached thereto, and the rear wheel stay 71 is further rotated upward. When the moving operation is performed, the lock bar 45 is pushed by the cam plate 75 via the guide roller 48, so that the lock bar 45 is
Move up against 5. Thereafter, the cam surface 75a is also displaced upward by the upward rotation of the rear wheel stay 71, whereby the lock bar 45 moves upward against the compression spring 49, and the upper end thereof gradually becomes the lock hole of the block body 76. 76a so that both connecting plates 56, 56 are connected to the connecting recesses 40, 4
Thus, the connection of the lift-up device 50 to the seat device 10 is completed.

As described above, the front link arm 67
At the stage when the motor is rotated by about 90 ° and rises substantially vertically, a further rotation is prevented by the stopper 66a. For this reason, when the rear wheel stay 71 is further rotated upward to move the rear wheel 70 in the storage direction, the rear link arm 73 is displaced forward, so that the front link 81 is supported via the support shaft 81 as shown in FIG. The upper end of the arm 67 is pushed forward. Then, the front link arm 67 is displaced in the falling direction, and accordingly, the front wheel stays 63 are bent rearward (inward) via the hinges 62, respectively. The rear wheel stays 71, 71 are turned upward by approximately 90 ° to rotate the rear wheels 70, 71.
When the front wheel stays 70 are stored in the cover bodies 30, 30, the front wheel stays 63, 63 are bent to a substantially horizontal position,
0 is the seat cushion 1 in the horizontal posture as described later.
The front and rear wheels 60, 60, 7
The 0,70 folding operation is completed. FIG. 4 shows this folded state. Although not shown, the rear wheel 7 is not shown.
A lock is provided substantially at the center of the connecting rods 72 of 0 and 70, and a striker is provided on the lower surface of the seat cushion 11a.
And the rear wheels 70, 70 are held in the storage position. In this case, if only the rear wheels 70, 70 are held in the storage position by the lock and the striker, the front wheels 60, 6
0 is also held in the storage position, and is held in a lateral posture as described below.

Next, when the front wheels 60, 60 are stored under the seat cushion 11a, the posture of the front wheels 60, 60 is changed from a vertical posture to a horizontal posture by the above-mentioned swing mechanism 97. . That is, as shown in FIG. 13 and FIG. 14, at the final stage in which the front wheel stay 63 rotates upward about the hinge 62, the engaging pin 65 provided on the bracket 64 contacts the regulating plate 96 of the seat frame 20. Touch The front wheels stays 63, 63 are further rotated upward while the engagement pins 65 are in contact with the regulating plates 96, so that the brackets 64, 64 rotate around the front wheel stays 63, respectively. The direction of 60 is forcibly changed from the vertical posture to the horizontal posture. The front wheel 6
Regarding the direction of 0, the vertical posture refers to a posture in which the rotation axis is aligned in the horizontal direction, and the horizontal posture refers to a posture in which the rotation axis is aligned in the vertical direction. 13 and 14, the front wheels 60 in the horizontal posture are indicated by solid lines, and the front wheels 60 in the vertical posture are indicated by two-dot chain lines. Thus, the front wheels 60, 60
Is forcibly changed to the horizontal posture at the time of storage, so that it is stored in a state in which it does not protrude from the lower surface of the seat frame 20, ie, the space occupied in the vertical direction is the most compact. According to this, at the stage where the seat device 10 is housed in the vehicle interior, the housing height of the seat device 10 can be made as low as possible, and as a result, the seat device 10 can be housed at almost the same height as other ordinary seats. Can eliminate the feeling of discrimination.

Next, after the front wheels 60, 60 and the rear wheels 70, 70 are stored as described above, the lift-up device 50 is operated again inside the room to move the connected seat device 10 indoors. The two-bar link mechanism 55 moves to the upright position, and the seat device 10 is almost
At the stage where it is positioned above, the electric cylinder 95 stops and the lift-up device 50 stops. In addition,
At this stage, the four-joint link mechanisms 55 and 55 are locked in the upright position by a swing lock mechanism (not shown), so that the seat device 10 is held above the swing base 54. After moving the seat device 10 into the room in this way, the seat device 10 and the swing base 54 are integrally rotated about 90 degrees by manual operation to be positioned at the seating position facing the front of the vehicle. In addition, the seat apparatus 10 is slid rearward while rotating to a position facing the vehicle forward to reach a seating position by the interlocking mechanism described above. Thus, a series of operations until the seat device 10 that can be used alone is positioned at the seating position in the vehicle compartment is completed.

Conversely, in order to move the seat device 10 from the seated position in the vehicle compartment to the outside of the vehicle compartment so that it can be used alone as a wheelchair, the above operation may be performed. That is,
In a state where the seat device 10 is moved out of the passenger compartment by the operation of the lift-up device 50, first, the rear wheel stays 71, 71 are pivoted downward to take out the rear wheels 70, 70. The front link arm 67 moves, whereby the front wheel stay 63 rotates downward. When the rear wheel stays 71 are pivoted downward, the lock bars 45, 45 are respectively returned downward by the compression springs 49, and the upper ends thereof are locked in the lock holes 76a of the block body 76.
From the connection recesses 40 so that the connection plates 56 can be detached from the connection recess 40. As shown in FIG. 3, when the rear wheel stays 71, 71 are rotated downward by about 45 °, the front link arm 67 is returned to an almost upright state, and the front wheel stays 63, 63, and thus the front wheels 60, 60 are completely completed. It will be in the state of being taken out. When the front wheels 60, 60 are taken out of the storage position and the engaging pins 65, 65 are separated from the regulating plates 96, 96, the vertical position is determined by the positional relationship between the rotation axis of the bracket 64 and the center of gravity of the front wheel 60. Is returned to.

When the rear wheel stays 71, 71 are taken out to a substantially upright state, the front link arm 67 and the rear link arm 73 are substantially in a straight line, and in the process, the folding lock mechanism 80 is moved as described above. 9 through the states shown in FIGS. 10 and 11 to the state shown in FIG. 12, whereby the two link arms 67 and 73 are locked in a substantially straight line, and therefore the front wheel stays 63 and 63 and the rear wheel The stays 71, 71 are locked at the take-out position.

After the front wheels 60, 60 and the rear wheels 70, 70 are taken out in this way, the lift-up device 50 is further operated to the outside of the vehicle, and the seat device 10 is grounded. After the seat device 10 is grounded, the two connecting plates 5
6 and 56 are withdrawn from the connecting recesses 40 and 40, whereby the seat device 10 is separated from the lift-up device 50. The seat device 10 thus separated can be used alone as a normal wheelchair. On the other hand, the lift-up device 50 is actuated in a direction to return the four-bar linkages 55, 55 to the indoor side and is accommodated in the vehicle interior.

According to the vehicle lift-up seat 1 configured as described above, the front and rear wheels 60, 6
Since the folds 0, 70, and 70 are performed in conjunction with each other, the labor involved can be reduced as compared with the related art, and the vehicle lift-up seat 1 that is particularly convenient for caregivers can be provided. Also, the front wheel 6 is linked with the folding operation.
Since the posture of 0,60 is automatically changed from the vertical posture to the horizontal posture, the seat device 10 can be installed at almost the same height as other seats in the vehicle interior without any trouble. The vehicle lift-up seat 1
This gives the occupant less special feeling (eg, feeling of alienation in the passenger compartment).

Various modifications can be made to the embodiment described above. For example, the swing mechanism 97 of the front wheels 60, 60 may be set as needed. Also, the rear wheel 70,
In conjunction with the folding operation of 70, the lock bars 45, 45
Although the configuration in which the connection plates 56, 56 are fixed by moving up is exemplified, the fixing of the connection plates 56, 56 does not necessarily need to be linked with the folding operation of the rear wheels 70, 70. When not linked, the cam plate 75 and the lock bar 45 can be omitted.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an embodiment of the present invention, and is a perspective view illustrating a state where a seat device is separated from a lift-up device.

FIG. 2 is a side view of the seat device. This figure shows a state where the front and rear wheels are taken out and grounded.

FIG. 3 is a side view of the seat device. This figure shows a stage in the middle of turning the rear wheel in the folding direction, and shows a state in which the front wheel has not yet been folded.

FIG. 4 is a side view of the seat device. This figure shows a state in which the front and rear wheels are completely folded.

FIG. 5 is a perspective view of a lift-up device.

FIG. 6 is a cross-sectional view showing a state in which a connecting plate is fitted into a connecting recess.

FIG. 7 is a side view showing a state where the connecting plate is fitted into the connecting recess.

FIG. 8 is a perspective view of a front wheel removal lock mechanism.

FIG. 9 is a side view of the folding lock mechanism. This figure is
This shows a state where the lock arm is not engaged with the engagement edge of the rear link arm.

FIG. 10 is a side view of the folding lock mechanism. This figure shows a state in which the engaging edge of the rear link arm is engaged with the arc-shaped portion of the lock arm.

FIG. 11 is a side view of the folding lock mechanism. This figure shows a state where the engaging edge of the rear link arm has passed over the arc-shaped portion of the lock arm.

FIG. 12 is a side view of the folding lock mechanism. This drawing shows a state in which the engaging edge of the rear link arm has entered the lower side of the lock claw of the lock arm, and the front and rear link arms have been locked at the removal position.

FIG. 13 is a perspective view showing a swing mechanism of a front wheel, in which a front wheel in a horizontal posture is indicated by a solid line, and a front wheel in a vertical posture is indicated by a two-dot chain line.

FIG. 14 is a view taken in the direction of the arrow (14) in FIG. 13, and is a view in which a swing mechanism of a front wheel is viewed from a rear side. Also in this drawing, the front wheels in the horizontal posture are indicated by solid lines, and the front wheels in the vertical posture are indicated by two-dot chain lines.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Lift-up seat for vehicles 10 ... Seat device 11 ... Seat main body, 20 ... Seat frame 40 ... Connection recessed part, 45 ... Lock bar 50 ... Lift-up device 55 ... Four-bar link mechanism 56 ... Connection plate 60 ... Front wheel, 63 ... Front wheel stay 67 Front link arm 70 Rear wheel 71 Rear wheel stay 73 Rear link arm 75 Cam plate 80 Folding lock mechanism 82 Lock arm 90 Front wheel take-out lock mechanism 95 Electric cylinder 96 Regulatory plate

Continuation of the front page (72) Inventor Kenji Murabayashi 100 Kanayama, Ichiriyama-cho, Kariya-shi, Aichi Pref. Toyota Shatai Co., Ltd. (56) References (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A61G 3/00 A47C ⁷ /00-7/02 A61G 5/00 B60N 2/00-2/24 B60P 3/00

Claims (2)

(57) [Claims] 1. A seat device having a seat body, a front and rear wheel that can be folded while a seated person is seated on the seat body, and a seat device installed in a vehicle interior, the seat device being connected to seat the seat body. A lift-up device for moving the seat device between the vehicle interior and the exterior of the vehicle interior while maintaining a posture, wherein the seat device is movable into the vehicle interior and can be used as a seat for the vehicle interior; A vehicle lift-up seat configured to be moved outside and used alone as a wheelchair separately from the lift-up device, comprising: a front wheel stay that rotates rearward; and a rear wheel that rotates forward.
Having a stay, rotating the front wheel stay and the rear wheel stay
The front and rear wheels are foldable upward,
Support the front link arm so that it can rotate up and down on the stay.
Supports the rear link arm so that it can rotate up and down on the rear wheel stay
And the two link arms are connected so as to be rotatable with each other.
The upper part of the front link arm with respect to the front wheel stay
Providing a stopper that restricts the rotation to a predetermined angle,
The front wheel stay rotates in conjunction with the rotation of the rear wheel stay
A lift-up seat for vehicles with a configuration . 2. The vehicle lift-up seat according to claim 1, wherein the front wheels are swingably supported, and the posture of the front wheels is changed from a vertical posture to a lateral posture in conjunction with a folding operation. Lift-up seat for vehicles.