JP2002012070A - Seat device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat device for a vehicle capable of positively detecting an abnormal state such as the connection failure of the seat device and a lift-up device, with simple constitution. SOLUTION: This seat device for the vehicle is provided with an abnormality detector for detecting an abnormal state on the basis of the connected state of the seat device and lift-up device and the change of load applied to a driving device. The abnormal state can thereby be detected early with simple constitution to improve safety.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat device provided with an abnormality detecting device for detecting a connection failure between a seat device and a lift-up device.

[0002]

2. Description of the Related Art The applicant of the present invention has a seat device and a lift-up device installed in a vehicle interior for moving the seat device between the vehicle interior and the exterior of the vehicle interior. A vehicle seat device that can be used as a seat and a wheelchair has been developed.

According to the vehicle seat device, a seated person can get on and off the vehicle while sitting on the seat device. This eliminates the need for the occupant to perform a transfer operation between the vehicle interior seat and the wheelchair, thereby greatly reducing the burden on the occupant and his / her caregiver.

[0004]

In such a vehicle seat device, when the lift-up device is operated,
It is necessary to detect an abnormal state at an early stage with a simple configuration and perform abnormal processing. The abnormal state to be detected is, for example, that the seat device is lifted by the lift device in a state where the connection between the seat device and the lift device is incomplete, and that an obstacle exists below the seat device. There are things. Therefore, an object of the present invention is to provide a vehicle seat device capable of reliably detecting an abnormal state with a simple configuration.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention is directed to an abnormality detecting device for detecting an abnormality based on a connection state between a seat device and a lift-up device and a change in a load applied to a driving device. It is a vehicle seat device provided with.
In the present invention, safety can be improved because an abnormal state can be detected early with a simple configuration.

According to a second aspect of the present invention, there is provided a vehicle seat device for detecting an abnormality by detecting a change in load applied to a driving device in a state where the seat device and the lift-up device are not connected to each other. Specifically, if the connection is incomplete when lifting the lift-up device with the seat device mounted, if the connection is incomplete when lowering the lift-up device with the seat device mounted, or ,
When only the lift-up device is lowered with the seat device not mounted, it is possible to detect an abnormality such as the lift-up device hitting an obstacle present below.

Further, in the invention according to claim 3,
The state of the wheels of the seat device, for example, a signal indicating whether the wheels are folded or pulled out is detected as a connector connection confirmation signal via a signal transmission / reception connector provided between the seat device and the lift-up device. By doing so, it is determined whether or not the seat device and the lift-up device are in a connected state.

Further, in the invention according to claim 5,
By using a connection confirmation sensor such as a limit switch in an appropriate position, it is determined whether or not the seat device and the lift-up device are connected.

[0009] In the invention according to claim 5,
Equipped with a pulse generator according to the rotation of the drive shaft in the drive unit, and by detecting whether there is a change in the load on the lift-up device based on the change in the pulse waveform, detecting the change in the load on the drive unit I do.

Further, according to the invention described in claim 6, the pulse generator has a Hall element for detecting passage of a magnet provided on a drive shaft.

[0011]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a schematic view of an embodiment of a vehicle seat device 1. The vehicle seat device 1 includes a seat device 10 and a lift-up device 50 installed in the vehicle interior for moving the seat device 10 between the vehicle interior and the exterior of the vehicle interior. By operating the lift-up device 50 in a state where the lift-up device 50 and the seat device 10 are connected, the seat device 10 can be moved from the interior of the vehicle to the exterior of the vehicle, and vice versa. The seat device 10 can be used as a normal vehicle seat inside the vehicle compartment, and can be used alone as a wheelchair outside the vehicle compartment. Thus, the seated person can get on or get off the vehicle while sitting on the seat device 10.

First, the seat device 10 includes a seat body 11.
And front and rear wheels 60 and 70 that can be folded.
The seat body 11 has a seat cushion 11a and a seat back 11b. Seat cushion 11a
The seat back 11b is fixed while being placed on the seat frame 20. FIG. 3 shows a state where the seat body 11 is removed from the seat apparatus 10. A front wheel 60 and a rear wheel 70 are connected to the seat frame 20 by an interlocking mechanism 35.
It is foldably attached via. That is, at the rear of the left and right side frames 21 of the seat frame 20 (rear side with respect to the moving direction of the seat device 10), the upper ends of the rear wheel stays 71 are rotatably supported via the support shafts 71a. I have. Rear wheels 70 are rotatably attached to lower ends of the rear wheel stays 71, respectively. Both rear wheel stays 71 are connected by a connecting rod 72.
Therefore, both rear wheel stays 71 rotate integrally. One end of a rear wheel link arm 74 is rotatably connected to a longitudinal center of the connecting rod 72 via a support shaft 73.
The other end of the rear wheel link arm 74 is rotatably connected to the center of the moving frame 80 in the longitudinal direction via a support shaft 75.
The moving frame 80 will be described later.

[0013] Between the side frames 21 of the seat frame 20,
A front frame 23, a middle frame 22, and a rear frame 24 are attached from the front side (the front side with respect to the moving direction of the sheet device 10). A footrest support frame 100 is attached to the front frame 23. At the center of the footrest support frame 100, a flat footrest 101 is attached so as to be taken out and stored. L-shaped support frames 102 are attached to both sides of the footrest support frame 100.
A connecting rod 103 is mounted between the two support frames 102. At both ends of the connecting rod 103, front wheel stays 91 (approximately central portions in the figure) are provided on the support shafts 9 respectively.
It is rotatably mounted via 1a. A bifurcated front wheel bracket 96 that is rotatable around the axis of the front wheel stay 91 is attached to a lower portion of both front wheel stays 91. The front wheel 60 is rotatably attached to the front wheel bracket 96. Therefore, the front wheel 6
Numeral 0 is attached to the front wheel stay 91 so as to be able to swing (the rotation axis of the front wheel 60 is movable along the horizontal plane). On the other hand, one end of a front wheel link arm 93 is rotatably connected to upper ends of both front wheel stays 91 via support shafts 92, respectively. The other ends of the front wheel link arms 93 are rotatably connected to left and right ends of the moving frame 80 via a support shaft 94 and an L-shaped bracket 95, respectively.

The front frame 23 and the middle frame 22 of the seat frame 20
And two slide bars 81 are attached in parallel with each other. A moving frame 80 is slidably attached to the front and rear via the two slide bars 81. A nut 82 is attached to substantially the center of the moving frame 80. A screw shaft 83 is inserted into the nut 82 in a meshing state. One end of the screw shaft 83 is rotatably supported by the middle frame 22, and the other end is connected to an electric motor 85 via a gear box 84. When the electric motor 85 rotates forward or backward, the screw shaft 83 rotates forward or backward through the gear box 84. Thereby, the screw shaft 8
The moving frame 80 translates forward or backward by the meshing action of the nut 3 and the nut 82.

The electric motor 85, gear box 84, screw shaft 83, nut 82, front wheel link arm 93, and rear wheel link arm 74 constitute a wheel folding device 86. When the electric motor 85 of the wheel folding device 86 is rotated forward and the moving frame 80 is moved forward in parallel, the front wheel link arm 93 moves forward. As a result, both front wheel stays 91 rotate in the clockwise direction in the drawing (direction for moving the front wheel 60 rearward) around the support shaft 91a, and the front wheels 60 are folded rearward. When the electric motor 85 is rotated forward to move the moving frame 80 forward, the rear wheel link arm 74 moves forward. As a result, the connecting rod 72 moves forward, and both rear wheel stays 71
Rotate in the counterclockwise direction in the drawing (the direction in which the rear wheel 70 is moved forward) around the support shaft 71a, and both rear wheels 70 are folded forward. Hereinafter, the moving direction (forward) of the moving frame 80 when the electric motor 85 is rotated forward,
The direction of movement of the front wheel link arm 93 (forward), the direction of rotation of the front wheel stay 91 (clockwise direction in FIG. 3), the direction of movement of the rear wheel link arm 74 (front), and the direction of rotation of the rear wheel stay 71 (FIG. 3). In the counterclockwise direction) are also referred to as “folding directions”.

Conversely, when the electric motor 85 is rotated in the reverse direction and the moving frame 80 is moved rearward in parallel, the front wheel link arm 9
3 moves backward. As a result, both front wheel stays 91 rotate counterclockwise in the drawing around the support shaft 91a, and thereby both front wheels 60 are taken out from the folded position. When the moving frame 80 is moved rearward in parallel, the rear wheel link arm 74 moves rearward. As a result, both rear wheel stays 71 rotate clockwise in the drawing around the support shaft 71a, and both rear wheels 70 are taken out from the folded position. Hereinafter, the moving direction or the rotating direction of each part when the electric motor 85 rotates in the reverse direction is also referred to as a “pull-out direction”. As described above, when the moving frame 80 is moved by the wheel folding device 86, the interlocking mechanism 35 causes the front wheel 6 to move.
The wheels 0, 60 and the rear wheels 70, 70 are folded upward or taken out downward. In FIG. 4, the positions of the front wheel 60 and the rear wheel 70 in the pulled-out state are indicated by solid lines. The state in which the front wheel 60 and the rear wheel 70 are folded is indicated by a two-dot chain line.

Next, when the front wheel 60 is folded, the posture is forcibly changed from the vertical posture to the horizontal posture. The front wheel bracket 96 that supports the front wheel 60 for rotation as described above.
Are rotatably supported on the front wheel stay 91 around the axis of the front wheel stay 91. Thus, the front wheel 60 is supported so as to be able to swing right and left around the axis of the front wheel stay 91, that is, the caster axis C. On the other hand, FIG.
As shown in FIGS. 5 and 6, an attitude regulating guide 77 is attached to each of the rear wheel stays 71 via a support plate 76. This posture regulating guide 77 has a rod-shaped guide body 77a and two support columns 77b and 77c. The guide body 77a is fixed to the support plate 76 via support columns 77b and 77c. As shown in FIG. 6, since the lower support column 77c is formed shorter than the upper support column 77b, the guide main body 77a is inclined inward in the width direction toward the upper side. A collar 77d is mounted on the guide body 77a so as to be rotatable and slidable in a certain range in the axial direction of the guide body 77a.
Thus, when the rear wheel arm 71 is at the take-out position, the collar 77d is moved by its own weight to the guide body 77.
a.

The posture regulating guide 77 constructed as above operates as follows. That is, the front wheel 60 and the rear wheel 7
When 0 is folded, the rear wheel stay 71 rotates upward at a higher speed than the front wheel stay 91. As a result, the edge of the front wheel 60 comes into contact with the collar 77d of the attitude regulating guide 77. The position where the collar 77d contacts is the edge of the front wheel 60 and is set to be a position displaced from the caster axis C. Therefore, as the front wheel 60 is folded, the posture of the front wheel 60 is gradually changed from the vertical posture to the horizontal posture. At this time, since the collar 77d is mounted so as to be rotatable and slidable in a predetermined range in the axial direction of the guide main body 77a, the movement of the contact position between the collar 77d and the front wheel 60 accompanying the posture changing operation of the front wheel 60 ( The movement along the outer periphery of the front wheel 60) is performed smoothly. Therefore, the posture changing operation and the folding operation of the front wheel 60, and the folding operation of the rear wheel 70 are performed smoothly. Note that the vertical posture of the front wheel 60 refers to a posture in which the rotation axis (axle) of the front wheel 60 is in a horizontal direction (parallel to the ground).
Also, the lateral posture means that the folding operation of the front wheel 60 is completed,
This refers to a posture in which the rotation axis of the front wheel 60 is along a vertical direction (a direction orthogonal to the ground). Thus, the front wheel 60
When the is folded, its posture is changed to the lateral posture, so that the size of the downward extension can be reduced accordingly. Thus, the height of the seat device 10 in the vehicle cabin can be reduced, so that the occupant's special consciousness (eg, feeling of alienation of receiving special treatment) can be reduced.

As shown in FIG. 1, each of the left and right cover bodies 30 is provided with a rising portion 30b along the side of the seat back 11b. This rising part 30
b, the seat device 10 is provided with a lift-up device 50.
There is provided a connecting portion 40 for connecting to. Details of the connecting portion 40 are shown in FIGS. 9 and 10. Since the two connecting portions 40 are configured to be symmetrical left and right, FIG.
And the connecting portion 4 on the left side as viewed from the seated person as shown in FIG.
0 will be described. A substantially L-shaped first side plate 41 is fixed to the rear portion of the left side frame 21 of the seat frame 20 in a standing shape. On the upper part of the first side plate 41, a second
Side plates 42 are fixed in parallel at a fixed interval.
The front edge between the side plates 41 and 42 is an upper front plate 43 and a lower front plate 44.
Is closed by The upper part of the upper front plate 43 is bent in an inverted U-shape. Thereby, a hooking concave portion 40a for holding the upper portion 56c of the connecting plate 56 of the lift-up device 50 in a holding shape is formed in the upper portion of the connecting portion 40.

Both side plates 41, 42 and upper and lower front plates 43, 4
4 forms a substantially box-shaped connecting portion 40 that opens rearward and downward. The connecting plate 56 of the lift-up device 50 is fitted through the rear and lower openings of the connecting portion 40. The rear edge of the second side plate 42 is formed with a guide edge 42a bent outward at a substantially constant width. The guide edge 42a functions as a guide plate when the connecting plate 56 of the lift-up device 50 is fitted into the connecting portion 40. By connecting the connecting plates 56 of the lift-up device 50 to the pair of left and right connecting portions 40 provided in this manner, the seat device 10
Linked to A lock bar 45 is fixed to the upper part between both side plates 41 and 42 in a bridging manner. When the lock bar 45 is engaged with the connection plate 56 of the lift-up device 50, the connection state between the connection plate 56 and the connection portion 40 is locked. Details on this point will be described later.

Next, the lift-up device 50 installed in the vehicle interior will be described. The lift-up device 50 is shown in FIG.
As shown in FIG. 2, a main base 52 movable in the front-rear direction of the vehicle via a slide rail 51 installed on a floor R in the vehicle interior, a turntable 53 mounted on the main base 52, and a A swing base 54 is attached, and a pair of left and right four-bar linkages 55 attached to both sides of the swing base 54 is provided. In the present embodiment, no special drive means for moving the main base 52 in the vehicle front-rear direction is provided. Therefore, the main base 52 is moved in the vehicle front-rear direction by manual operation. The position of the main base 52 can be locked at an arbitrary position in the vehicle front-rear direction by a slide lock mechanism not shown. Of course, the movement of the main base 52 in the front-rear direction of the vehicle can be performed by, for example, an electric drive mechanism that combines a motor and a rack and pinion. The turntable 53 has an inner ring 53a and an outer ring 53b that are rotatably assembled to each other. For example, outer ring 5
3b is fixed on the main base 52, and the inner ring 53a is fixed on the lower surface of the swing base 54. Due to the turntable 53, the swing base 54 is rotated by approximately 90 degrees between a rotational position facing the front of the vehicle and a rotational position facing the vehicle side (the door opening D side, see FIG. 1). It is rotatably supported. The swing base 54 is held by a rotation lock mechanism (not shown) at two positions: a rotation position facing the front of the vehicle (riding position) and a rotation position facing the vehicle (riding position). ing.

Although not shown, the swing base 5
An interlocking mechanism for interlocking the rotation of the swing base 54 and the sliding operation of the main base 52 in the vehicle front-rear direction is interposed between the vehicle floor 4 and the vehicle floor F. The interlocking mechanism includes, for example, an arcuate pinion gear attached to the lower surface of the swing base 54, an intermediate gear rotatably supported by the main base 52 and meshing with the pinion gear,
The rack is mounted on the floor F along the slide rail 51 and meshes with the intermediate gear.

Next, the two-bar linkage mechanism 55 includes two link arms 55a and 55b. The lower ends of both front link arms 55a are swing base 5
4 is rotatably connected vertically via a support shaft 55d provided on the side wall portion 54c. On the other hand, the lower ends of the link arms 55b on the rear side are integrally connected by a single connection shaft 57 that rotates with respect to the side wall 54c. Thus, the link arms 55b are connected to the swing base 54 via the connection shaft 57 so as to be vertically rotatable. The connection shaft 57 is connected with an electric drive device 90 as a drive source that operates between a state in which the two four-bar linkages 55 are erected upward and a state in which the four-bar link mechanism 55 is swung to the side.

The connecting plates 56 described above are attached to the tips of the two four-bar linkages 55, respectively. The upper ends of the front and rear link arms 55a, 55b are
6 is rotatably connected to support 6 via support shafts 56a and 56b. As shown in FIG. 10, both connecting plates 56
Each has a substantially flat plate shape that can be fitted (preferably, substantially without a gap) into the connecting portion 40 of the seat device 10. When the upper portion 56c of the connecting plate 56 is fitted into the hooking concave portion 40a of the connecting portion 40, the displacement of the upper portion 56c of the connecting portion 40 in the detaching direction (rightward in FIG. 10) is restricted. Lock claws 58 are provided at the lower portions of both connecting plates 56, respectively. The locking claw 58 is connected to the connecting portion 4.
By being hooked on the lower front plate 44 from below, the displacement of the lower portion of the connecting plate 56 in the detaching direction is regulated.

A lock recess 56d is formed in the front side of both connecting plates 56 in a cut shape. On the other hand, as shown in FIGS. 9 and 10, a block 55c is attached to a position near the support shaft 56b of the link arm 55b on the rear side of the four-bar linkage 50. As shown in FIG. 10, when the connecting plates 56 are connected to the connecting portions 40, the lock bars 45 of the connecting portions 40 are fitted into the lock recesses 56d. This also restricts the displacement of the connecting plate 56 in the detaching direction (backward). Moreover, the front and rear link arms 55a, 55
When b is raised, the block 55c projects above the lock bar 45. This prohibits relative movement of the lock bar 45 from the lock recess 56d. Therefore, the connection state between the seat device 10 and the lift-up device 50 is reliably maintained. Sliding plates 56e each having a predetermined plate thickness are attached to both side surfaces of both connecting plates 56. The connecting plate 56 is connected to the connecting portion 4 by the sliding plate 56e.
It fits smoothly in the sheet thickness direction (the width direction of the sheet device 10) with respect to 0 and in the surface direction.

Next, the lower ends of both connecting plates 56 are connected by a receiving frame 59. When the seat device 10 is connected to the lift-up device 50, the receiving frame 59
The rear frame 24 of the seat frame 20 of the seat device 10
, And are located substantially in an overlapping manner from below. FIG.
As shown in (2), positioning pins 105 for positioning are attached to the rear frame 24 at two positions in the vicinity of the left and right side frames 21 so as to protrude downward. On the other hand, positioning holes 59 a are formed in the receiving frame 59 so as to correspond to the positioning pins 105. By inserting the positioning pins 105 into the positioning holes 59a, the lift-up device 50 is positioned with respect to the sheet device 10.

The rear frame 24 of the seat frame 20 has a power connector for supplying power via the lift-up device 50, and wheels indicating whether the wheels 60 and 70 of the seat device 10 are folded or pulled out. A male side 110a of a connector (so-called junction connector) 110 having a signal connector for transmitting a signal of a position detection sensor (connector connection confirmation signal) and the like is attached. On the other hand, the female side 110 b of the junction connector 110 is attached to the receiving frame 59. For this reason, the seat device 10 is
When the positioning pin 105 is connected to the positioning hole 59,
a, and the rear frame 24 of the seat frame 20 is positioned substantially superimposed on the receiving frame 59. at the same time,
The male side 110a of the junction connector 110 is connected to the female side 110b, and the seat device 10 and the lift-up device 50 are also electrically connected. The male side 110 a of the junction connector 110 is connected to the electric motor 85 of the wheel folding device 86. Therefore, when the male side 110a and the female side 110b of the power connector 110 are connected, power can be supplied to the electric motor 85, and the front wheel 60 and the rear wheel 70 can be folded or pulled out. The power supply connector and the signal transmission connector can be provided separately.

The lift-up device 5 configured as described above
0 is connected to or disconnected from the sheet device 10 as described below. The seated person may remain seated on the seat device 10 while the lift-up device 50 and the seat device 10 are connected or disconnected. Thus, the seated person can move from outside the vehicle compartment to the vehicle compartment while sitting on the seat device 10, and conversely, can move from the vehicle compartment to the outside of the vehicle compartment. First, an operation for connecting the seat device 10 located outside the vehicle compartment to the lift-up device 50 will be described. FIG. 1 shows a state where the seat device 10 is separated from the lift-up device 50. Further, the two-four-bar link mechanism 55 of the lift-up device 50 is in a state of being inclined to the swing-out side. On the other hand, the seat device 10 is
The 0 and the rear wheel 70 are pulled out downward, and are in a state where they can be used independently, that is, can be used as a normal wheelchair to move on the road.

To connect the seat device 10 to the lift-up device 50 in such a state, the seat device 10
Is moved backward to approach the lift-up device 50, and the receiving frame 59 is positioned below the rear frame 24 of the seat frame 20. Thereafter, the electric drive device 90 of the lift-up device 50 is operated to the upright side, and the two four-bar linkages 55 are slightly moved in the upright direction. As a result, the two connecting plates 56 and the receiving frame 59 are integrally raised, and the receiving frame 59 is superimposed on the rear frame 24 of the seat frame 20 from below. In the process, the positioning pin 105 is inserted into the positioning hole 59a, so that the lift-up device 5
0 is positioned with respect to the sheet device 10. Further, the male side 110a of the junction connector 110 is connected to the female side 110b, so that power can be supplied to the seat device 10 and signals can be transmitted and received between the seat device 10 and the lift-up device 50.

Further, when the two connecting plates 56 are raised,
The connecting plate 56 is fitted into the connecting portion 40 of the seat device 10. The upper end portions 56c of both connecting plates 56 are connected to the connecting portions 4 respectively.
0, the two connecting plates 56
Are hooked from below on the lower edge of the lower front plate 44 of the connecting portion 40, and the lock pin 45 is fitted into the lock recess 56d of the connecting plate 56. At this stage, both connecting plates 56 are connected to the connecting portion 40 of the seat device 10 so as to be relatively immovable in the left-right direction and the rear.

The four-link mechanism 5 of the lift-up device 50
When the seat device 5 is further moved upright (inside the room), the seat device 10 rises from the ground. At this stage, the lift-up device 50 is temporarily stopped, and the front wheel 60 and the rear wheel 70 of the seat device 10 are folded. The manner in which the front wheel 60 and the rear wheel 70 are folded is shown in FIG.

To fold the front wheel 60 and the rear wheel 70, the electric motor 85 of the wheel folding device 86 is activated in the folding direction, for example, in the normal rotation direction. The drive control of the electric motor 85 is performed by controlling the power supplied to the electric motor 85 via the junction connector 110.
When the electric motor 85 starts to move forward, the moving frame 80 moves parallel to the folding side. As a result, both front wheel link arms 93 and rear link arms 74 are folded in the folding direction (front,
(Left in FIG. 4). Both front wheel link arms 9
When 3 moves in the folding direction, both front wheel stays 91 rotate in the folding direction (counterclockwise direction in FIG. 4) around the support shaft 91a. Therefore, both front wheels 60 move in the folding direction. At the same time, the two rear wheel stays 71 rotate in the folding direction (clockwise direction in FIG. 4) about the support shaft 71a. Therefore, both rear wheels 70 move in the folding direction.

At the stage where the front wheel 60 and the rear wheel 70 are folded, the attitude of the front wheels 60 is forcibly changed from the vertical attitude to the horizontal attitude as described above. This situation is shown in FIGS. As shown in FIGS. 5 and 6, when the front wheel 60 and the rear wheel 70 that are being folded approach each other, the collars 77 d of the attitude regulating guide 77 abut on the edges of the front wheels 60. When the rear wheel stay 71 further rotates in the folding direction in this contact state, the bracket 96 of the front wheel 60 rotates with respect to the front wheel stay 91. Thereby, both front wheels 6
0 is placed on the guide main body 77a to take a lateral posture. FIGS. 7 and 8 show the state in the horizontal posture.

Thus, the front wheels 60 and the rear wheels 70 are folded while the postures of the front wheels 60 are changed from the vertical posture to the horizontal posture. It should be noted that the movement frame 80 is located at the slide front end position and the rear end position, for example, as shown in FIG. 3, as shown in FIG. 3, the wheel folding limit switch 170 and the wheel pulling limit switch 171 provided on the seat frame 21.
And so on. In this case, each limit switch 1
70 and 171 constitute a wheel position detecting sensor. Also, as shown in FIG. 13, the wheel folding limit switch 170 and the wheel pulling limit switch 171
Is connected to the control unit 180 via the junction connector 110 (connector connection confirmation signal). The moving frame 80 reaches the slide front end position (the folding of the front wheel 60 and the rear wheel 70 is completed).
Then, the wheel folding limit switch 170 is turned on.
Then, the output signal is transmitted to the control unit 180 of the lift-up device 50 via the signal transmitting / receiving connector.
And the rotation of the electric motor 85 is stopped. On the other hand, when the moving frame 80 reaches the rear end position, the front wheel 60 and the rear wheel 7
When 0 is pulled out, the wheel withdraw limit switch 1
71 turns on. Then, the rotation of the electric motor 85 is stopped based on the output signal. (Fig. 3)

After the front wheel 60 and the rear wheel 70 are folded, the seat device 10 can be accommodated in the vehicle interior by operating the lift-up device 50 again in the vehicle interior. When the two-bar link mechanism 55 has almost moved to the upright position, and the seat device 10 is almost positioned on the swing base 54, the electric drive device 90 stops. At this stage, the two-bar links 55 are locked in the upright position by a swing lock mechanism (not shown). As a result, the position of the seat device 10 is held above the swing base 54.

When the link arm 55b on the rear side of the two-bar link mechanism 55 is substantially upright, the block 55c projects above the lock bar 45 as shown in FIG. Thereby, the upward movement of the seat device 10 with respect to the lift-up device 10 is restricted.
After the seat device 10 is moved into the vehicle interior as described above, the seat device 10 and the swing base 54 are integrally rotated by about 90 degrees by manual operation to be positioned at a rotational position facing the front of the vehicle. At this time, the seat device 10 is slid rearward and reaches the seating position while rotating to the rotational position facing the front of the vehicle by the interlocking mechanism described above. As described above, a series of operations until the independently usable seat device 10 is positioned at the seating position in the vehicle compartment is completed.

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 the seat device 10 can be used alone as a wheelchair, the above operation may be performed in reverse. That is, first, the seat device 10 is moved to the front by a predetermined distance in the vehicle interior while rotating the seat device 10 toward the door opening D by manual operation. When the seat device 10 is turned to the door opening side, the electric drive device 90 of the lift-up device 50 is activated to the swinging side (for example, in the reverse rotation direction), and the two four-link mechanism 55 is activated.
To the outside of the room (down). Thereby, the seat device 10 can be moved from the vehicle interior to the vehicle exterior. When the lift-up device 50 is operated to the outside of the room, the link arms 55a and 55b of the two-bar link mechanism 55 tilt in the falling direction. Thereby, as shown by a two-dot chain line in FIG. 10, the link arms 55a and 55b rotate counterclockwise around the support shafts 56a and 56b with respect to the connecting plate 56, respectively. When the rear link arms 56b rotate counterclockwise with respect to the connecting plate 56, the block 55c is retracted from above the lock pin 45. As a result, the lock pin 45 is released from the lock recess 56d.

The seat device 10 is moved out of the vehicle compartment, and the folded front wheel 60 and rear wheel 70 are pulled out at a stage where the seat device 10 has not yet touched the ground. This includes the wheel folding device 8
6 is pulled out (for example, in the reverse direction).
To start. When the electric motor 85 rotates in the reverse direction, the moving frame 8
0 translates in the pull-out direction (to the right in FIG. 4). Thereby, both front wheel link arms 93 and rear link arms 74 move in the pull-out direction. When both front wheel link arms 93 move to the drawer side, both front wheel stays 91
Are drawn out around the support shaft 91a (FIG. 4).
At a clockwise direction). Therefore, both front wheels 60 are pulled downward. At the same time, both rear wheel stays 7
1 rotates in the pulling-out direction (counterclockwise direction in FIG. 4), and both rear wheels 70 are pulled down. Completion of the withdrawal of the front wheel 60 and the rear wheel 70 is detected by the wheel withdrawal limit switch 171, and the control unit 180 is connected via the junction connector 110.
Sent to.

After the front wheel 60 and the rear wheel 70 have been pulled out in this manner, the lift-up device 50 is further operated to the outdoor side (the four-link mechanism 55 is tilted to the outdoor side), and the front wheels 60 and The rear wheel 70 is grounded. After the seat device 10 is grounded, when the lift-up device 50 is continuously operated outside, the connection between the connecting portion 40 and the connecting plate 56 is released. That is, the lock claws 58 of the two connecting plates 56 are disengaged from the lower edge of the lower front plate 44 of the connecting portion 40, the lock pins 45 of the connecting portion 40 are detached from the locking recesses 56 d of the two connecting plates 56, and the connecting plates 56 are further removed. Upper end 56c
Is pulled out from the hook recess 40a. When both connecting plates 56 are displaced downward with respect to the connecting portion 40, the receiving frame 5
9 moves away from the rear frame 24 of the seat frame 20. Thereby, the positioning pin 105 is pulled out from the positioning hole 59a. Further, the male side 110a and the female side 110b of the junction connector 110 are disconnected, so that power supply to the seat device 10 and transmission / reception of signals between the seat device 10 and the lift-up device 50 are cut off.

In this manner, both connecting plates 56 are connected to connecting portions 40.
After the sheet device 1 is displaced downward with respect to
When 0 is moved forward, the seat device 10 is completely disconnected from the lift-up device 50. Since then
The seat device 10 can be used alone as a wheelchair. On the other hand, in the lift-up device 50 from which the seat device 10 is separated, the four-joint link mechanism 55 is actuated toward the passenger compartment to be accommodated in the passenger compartment.

The vehicle seat device 1 configured as described above
According to this, when both connecting plates 56 of the lift-up device 50 are respectively inserted into the connecting portions 40 of the seat device 10 from below, the lock claws 58 of the both connecting plates 56 are respectively connected to the connecting portions 40.
Is hooked from below on the lower edge of the lower front plate 44, and the lock pins 45 are fitted into the lock recesses 56d of the both connection plates 56, respectively. As a result, the seat device 10 is connected to the lift-up device 50 so as to be relatively immovable in the left-right direction and rearward.

The link arm 55b on the rear side of the two-joint link mechanism 55 of the lift-up device 50 is substantially upright, and the block 55c attached to both link arms 55b is connected to the lock bar 45 of both connecting plates 56. It protrudes upward, and the lock bars 45 are prevented from coming out of the lock recesses 56d. As a result, the connection state of the seat device 10 to the lift-up device 10 in the passenger compartment is more firmly locked, and upward displacement (rattle or detachment) of the seat device 10 is restricted.

The two connecting plates 5 of the lift-up device 50
6 is inserted into the connecting portion 40 of the seat device 10, the connection state of the connecting plate 56 to the connecting portion 40 is shielded by the connecting portion 40 and cannot be seen from the outside.
Therefore, the appearance is not impaired. Further, the weight and cost of the seat device 10 can be reduced.

The positioning pins 105 attached to the rear frame 24 of the seat device 10 are inserted into positioning holes 59a provided in the receiving frame 59 of the lift device 50. This also prevents the displacement of the seat device 10 with respect to the lift-up device 50.

The vehicle seat device 1 according to the present embodiment is in an abnormal state such as when the lift device 50 raises the seat device 10 in a state where the connection between the lift device 50 and the seat device 10 is incomplete. Is provided. The abnormality detection device used in the present embodiment includes a connection state between the seat device 10 and the lift-up device 50, a change in a load applied to a driving device that drives the lift-up device 50, and a position of the connection plate 56 of the lift-up device 50. An abnormal state is detected based on (height).

The position (height) of the connecting plate 56 of the lift-up device 50 is detected by a lift sensor 130 shown in FIG. In the present embodiment, the lift sensor 130
Is a limit switch of an always-on type, and one side wall 5 of the swing base 54 is
4c. The bracket 131 is attached so as to be able to turn up and down around a connection shaft 57 that turns and supports the link arm 55b on the rear side. A tension spring 13 is provided between the bracket 131 and the side wall 54c.
2 are interposed. Thereby, the bracket 131
Are urged clockwise in FIG. On the other hand, a detection bar 134 is attached via a bracket 133 at a position near the connection shaft 57 of the rear link arm 55b. The position of the detection bar 134 in the axial direction can be adjusted. In the range in which the link arm 55b on the rear side rotates from the substantially horizontal position (the position shown in FIG. 14) where the connecting plate 56 is located at the lowest position in the upright direction by a fixed set angle θs, The position of the lift sensor 130 in the axial direction is set so as to push the operator downward. When the actuator is pushed down, the lift sensor 130 turns off. On the other hand, detection bar 1
When the lower end of the actuator 34 is separated from the operator and the depression of the operator is released, the lift sensor 130 is turned on. The set angle θs is set so that the wheels 60 and 70
0 is set to the rising angle of the rear link arm 55b required to slightly lift the zero from the ground.

The connection state between the seat device 10 and the lift-up device 50 is such that the connector connection confirmation means for detecting the connection state of the junction connector 110 and the receiving frame 59 and the rear frame 24 are properly aligned and connected. This is detected by the connection confirmation sensor 150 for detecting the fact.
In the present embodiment, the always-on type limit switch similar to the lift sensor 130 is used as the connection confirmation sensor 150, and is attached via the bracket 151 to the receiving frame 59 connecting the lower ends of the both connection plates 56. . When the lift-up device 50 is operated in the upright direction while the receiving frame 59 is positioned below the rear frame 24 of the seat frame 20, if the relative positions of the seat device 10 and the lift-up device 50 are appropriate, The receiving frame 59 is properly superimposed on the lower surface of the rear frame 24. As a result, the male side 110a of the junction connector 110 is connected to the female side 110b, and the positioning pin 105 is
9a. In this case, the operator of the connection confirmation sensor 150 is pushed down, and the connection confirmation sensor 150 is turned off. As described above, when the wheels 60 and 70 of the seat device 10 are being pulled out, the wheel pull-out limit switch 171 is turned on and the wheel folding limit switch 170 is turned off. If the wheels 60 and 70 are folded, the wheel drawer limit switch 171 is turned off and the wheel folding limit switch 170 is turned on. The detection signal (connector connection confirmation signal) of each of the limit switches 170 and 171 is transmitted to the control unit 180 provided on the lift-up device side via the junction connector 110. (FIGS. 3 and 13) Therefore, the junction connector 11
When the male side 110a of the “0” is connected to 110b, the detection signals of the limit switches 170 and 171 are transmitted to the control unit 180 via the junction connector 110.
Sent to. The control unit 180 and the limit switches 170 and 171 constitute a connector connection confirmation unit. The control unit 180 includes:
It is a box-shaped device composed of a logic circuit with a built-in microprocessor, and is installed at a stable position around the lift-up device 50 or its periphery.

On the other hand, when the relative position between the lift-up device 50 and the seat device 10 is not appropriate, the positioning pin 1
05 is not inserted into the positioning hole 59a. In this case, the male side 110a of the junction connector 110 is not connected to the female side 110b. Also, the connection confirmation sensor 150 is not turned off. The junction connector 1
The connection confirmation sensor 150 is set to be turned off after the male side 110a and the female side 110b are electrically connected to each other. That is, a state may occur in which the connector connection confirmation signal is detected but the connection confirmation signal is not detected.

Next, an embodiment of a load change detecting device 152 for detecting a change in load applied to a driving device for driving the lift-up device 50 is shown in FIG. Drive shaft 1 of drive unit
A disc-shaped member 191 that rotates together with the drive shaft 190 is provided at the distal end of 90. The magnets 192 are installed on the disk-shaped member 191 at equal intervals in the circumferential direction. In this embodiment, the magnet 192 is arranged on a gear for transmitting the driving force. Further, a Hall IC 193 is arranged at a position corresponding to the magnet 192 of the disk-shaped member 191. The Hall IC 193 includes the magnet 19
2 and the detection signal is sent to the control unit 1
8 The waveform is shaped in the Hall IC 193 or in the control unit 180, and a pulse signal as shown in FIG. 16 is obtained. The pulse width ta of this pulse signal is proportional to the rotation speed of the drive shaft 190. That is, when the load applied to the driving device increases, the rotation speed of the driving shaft 190 decreases, and as shown in FIG. 17, the pulse width increases and increases from ta to tb. On the other hand, when the load applied to the driving device decreases, the rotation speed of the driving shaft 190 increases, and the pulse width decreases from ta to tc. Control unit 180 is located in Hall I
The change in the load applied to the driving device is detected based on the change in the pulse width of the output signal of C193.

Next, FIG. 13 shows a schematic configuration diagram of an embodiment of a control device for a vehicle seat device according to the present invention. The control device 180 (control unit) has terminals A to Q for connecting external devices. Terminals A and B are provided with an electric motor 91 of an electric driving device 90, and terminal C is provided with a swing limit switch 151 for regulating the direction of the vehicle seat device when the vehicle seat device is moved out of the passenger compartment. Is a connection confirmation sensor 150, terminals E and F are wheel electric motors 86 via a junction connector 110, terminals G are wheel drawer limit switches 171 via a junction connector 110, and terminals H are junction connectors 110. The folding switch of the wheel 170 is connected to the terminals I and J via the load change detecting device 152.
However, the terminal K has a ground of the control unit 180, the terminal L has a lower limit switch 153 for detecting whether the lift-up device 50 is lowered to the lower end, and the terminal M has the lift-up device 50 raised to the upper end. A rising end limit switch 154 for detecting whether the switch is in operation, an up / down switch 155 to the terminals N and O, an alarm buzzer 156 that sounds when an abnormality occurs to the terminal P, and a lift sensor 130 to the terminal Q are connected. Next, an abnormal state detecting operation of the lift-up device during a series of raising and lowering operations will be described. FIG. 18 is a flowchart when the lift-up device 50 is raised, and FIG. 19 is a flowchart when the lift-up device 50 is lowered. Each operation is executed based on a command from a microprocessor built in the control unit 180.

First, the operation of raising the lift-up device 50 will be described with reference to the flowchart shown in FIG. First, at step 201, it is determined whether or not the lift switch is on. If the up switch is on, the process proceeds to step 202. If the up switch is off, the process proceeds to the flowchart at the time of descent shown in FIG. In step 202, the junction connector 1
It is determined whether or not 10 is connected. In the present embodiment, whether or not the junction connector 110 is connected is determined by whether or not a connector connection confirmation signal, for example, an output signal of the wheel folding limit switch 170 and the wheel pull-out limit switch 171 from the seat device side can be detected. judge. If the junction connector 110 is not connected in Step 202, Step 2
Proceed to step 17. In step 217, it is determined whether or not the lift-up device 50 has risen to the rising end. If it has not risen to the rising end, the process proceeds to step 218, where the driving device 90 is turned on in the rising direction and the lift-up device 50 is turned on.
To rise. Then, in step 219, it is determined whether there is an abnormal load change. If no abnormal load change is detected, the routine returns. An abnormal load change occurs, for example, when the lift-up device 50 hits an obstacle.

Here, the pulse width of the pulse output from the load change detecting device 152 changes, for example, as the angle of the lift-up device changes, even when the lift-up device operates normally. Therefore, it is necessary to determine whether the change in the pulse width due to the load change is abnormal. There are various methods for detecting an abnormal change in the pulse width. For example, the average value of the pulse widths of several pulses output before that is calculated, and based on the comparison result of the pulse width of the current pulse with a reference value obtained by adding or subtracting a margin value from the average value, an abnormal pulse is calculated. It is determined whether or not the width is changed. For example, when the current pulse width is equal to or larger than the upper limit reference value or equal to or smaller than the lower limit reference value, it is determined to be abnormal. This state is called “abnormal load change”. In the present embodiment, this determination is performed by the control unit 180 to which the load change detection device 152 is connected. If it is detected in step 219 that there is an abnormal load change,
Abnormality processing is performed in step 220, and the routine returns. The abnormality at this time is, for example, when a change in abnormal load applied to the driving device 90 is detected in a state where the junction connector 110 is not connected. That is, when the sheet device 10 is lifted in a state where the connection between the lift-up device 50 and the sheet device 10 is incomplete, until the lift-up device 50 is connected to the sheet device 10, or
Lift-up device 50 without seat device 10
Is outside the vehicle compartment, and when moving into the vehicle compartment while ascending, it hits an obstacle on the way, or when someone leans on the lift-up device 50. By this processing, in particular, the lift-up device 50 and the seat device 10
It can be detected at an early stage that the sheet device 10 is lifted in a state where the connection with the sheet device 10 is incomplete. On the other hand, if it is determined in step 217 that the lift-up device 50 has risen to the rising end, the process proceeds to step 221 to turn off the drive device 90 and return. These processes are performed when the lift-up device 50 to which the seat device 10 is not mounted is normally moved into the vehicle compartment while being lifted.

If it is determined in step 202 that the junction connector 110 is connected, the process proceeds to step 203. Here, the control unit 180 determines whether or not a connector connection confirmation signal, for example, a signal indicating that the output signal of either the wheel folding limit switch 170 or the wheel pulling limit switch 171 is on is detected. . When the connector connection confirmation signal is detected, it is determined that the junction connector 110 is connected. In step 203, it is determined whether or not the connection confirmation signal from the connection confirmation sensor 150 has been detected. When the connection confirmation signal is detected, the process proceeds to step 204. In this embodiment, the connection confirmation sensor 150 is an always-on type limit switch installed in the lift-up device 50, and when it is turned off when the junction connector 110 is connected, it is determined that a connection confirmation signal has been detected.

In step 204, the lift-up device 5
It is determined whether or not the angle θ of the 0 arm is equal to or smaller than a predetermined angle θs. In the present embodiment, the angle θ of the arm is determined by the lift sensor 130. Lift sensor 130
Is an always-on type limit switch installed on the arm portion of the lift-up device 50, and turns off when the angle θ of the arm becomes equal to or larger than θs. If the angle θ of the arm is equal to or smaller than θs, the process proceeds to step 205. In the present embodiment, the angle θ of the arm indicates the angle in the upright direction of the arm with reference to the horizontal direction. Of course, the angle θ of the arm may be based on the standing position of the arm. In addition, "more than"
May or may not include the equal sign. Step 205
To turn on the drive device 90 on the lift-up device 50 side in the ascending direction, and proceed to step 206. In step 206, it is determined whether the load applied to the drive device 90 has changed abnormally while the lift-up device 50 is being lifted. If there is no abnormal load change, the routine returns and continues to rise while monitoring the change in load until the angle of the arm becomes θs. When it is determined in step 204 that the angle of the arm has reached the predetermined angle θs, the process proceeds to step 208.

In step 208, it is determined whether or not the wheels of the seat device 10 are folded. If the wheels are not folded, the process proceeds to step 209, where the driving device 90 is once turned off to stop the ascent. And step 21
At 0, the wheel electric motor 85 is turned on, and the wheel folding program is executed until the wheel is folded. In the present embodiment, whether the wheel is folded or not is determined by the wheel folding limit switch 170 transmitted from the seat device side.
Is determined by the output signal of If it is determined in step 208 that the wheel is folded, step 21 is executed.
Proceed to 1 to turn off the wheel electric motor 85, and
Proceed to 12.

In step 212, the lift-up device 5
It is determined whether 0 has risen to the rising end. If it has not risen to the rising end, the routine proceeds to step 213, where the driving device 90 is turned on again, and the routine proceeds to step 214. In this embodiment, an always-on type limit switch that is turned off when the lift-up device 50 rises to the rising end is provided, and if it is not turned off, it is determined that the lift-up device 50 has not yet risen to the rising end. Then, in step 213, the driving device 90 is turned on again, and the ascending operation is started. Then, in step 214, it is determined whether or not the load applied to the driving device 90 has changed abnormally. Return if there is no abnormal load change,
The ascent continues while monitoring the change in the load applied to the driving device 90. If it is determined in step 212 that it has risen to the rising end, the driving device 90 is turned off in step 216 and the routine returns. This series of operations is performed when the lift-up device equipped with the seat device is outside the vehicle compartment, rises while folding the wheel of the seat device halfway, and moves normally into the vehicle compartment.

If it is determined in step 206 that there is an abnormal load change, the process proceeds to step 207 and abnormal processing is performed. For example, processing such as stopping the driving device 90 is executed. The abnormality at this time is, for example, when an abnormality such as hitting an obstacle occurs in the middle of raising the arm of the lift-up device 50 to the predetermined angle θs, or when an abnormality occurs such as someone leaning on the lift-up device 50. It is.

If it is determined in step 214 that there is an abnormal load change, the process proceeds to step 215 and abnormal processing is performed. The abnormality at this time is, for example, when an abnormality such as hitting an obstacle while raising the arm of the lift-up device 50 to the predetermined angle θs, folding the wheel, and raising the wheel again to the rising end occurs, This is a case where an abnormality such as leaning on the up device 50 occurs.

If it is determined in step 203 that the junction connector 110 is connected, the process proceeds to step 222. In step 222, a value obtained by subtracting the time t2 at which the connector connection confirmation signal is detected from the current time t (t-t2) corresponds to a time lag from when the junction connector 110 is connected to when the connection confirmation sensor operates. It is determined whether or not the value Ts1 has elapsed. If (t−t2) is equal to or less than Ts1, the process proceeds to step 223, and the driving device 90 is turned on. And step 22
At 4, it is determined whether or not there is an abnormal load change. If there is no abnormal load change, return is made, and the current time t becomes the time lag Ts1.
Until the above, the lifting of the lift-up device 50 is continued. When it is determined in step 224 that there is an abnormal load change, abnormal processing is performed in step 225 and the routine returns.
The abnormality at this time is, for example, when the seat device 10 is mounted and the lift-up device 50 is being lifted, the lift-up device is connected between the connection of the junction connector 110 and the passage of the threshold value Ts1. For example, the seat device 10 is lifted in a state where the connection between the seat device 50 and the seat device 10 is incomplete, the lift-up device hits an obstacle, or someone leans on the lift-up device. With this processing, it is possible to detect early that the seat device 10 is lifted in a state where the connection between the lift-up device 50 and the seat device 10 is incomplete. If the connection confirmation signal cannot be detected even after the threshold value Ts1 has passed since the connection of the junction connector 110 in step 222, it is determined that the connection state is incomplete, and abnormal processing is performed in step 226. To return. The abnormality at this time is that the junction connector 110 is connected and the connector connection confirmation signal can be detected, but the connection confirmation sensor 150 does not operate because a foreign object is caught between the receiving frame 59 and the rear frame 24. By this processing, in particular, the lift-up device 50
That the seat device 10 is lifted in a state where the connection between the seat device 10 and the seat device 10 is incomplete can be detected at an early stage.

Next, the operation of lowering the lift-up device 50 will be described with reference to the flowchart shown in FIG. In step 301, it is determined whether the down switch is on. If the down switch is on, the process proceeds to step 302. If the down switch is off, the control returns to the start because both the up switch and the down switch are off. If the down switch is on,
In step 302, the seat device 10 and the lift-up device 5
It is determined whether 0 is connected. In the present embodiment, it is determined whether or not the junction connector 110 is connected based on the connector connection confirmation signal. In step 302, the determination is made based on the connector connection confirmation signal. However, the determination may be made based on the connection confirmation signal. Alternatively, the determination may be made based on both. If the junction connector 110 is connected, the angle of the arm is set to θs in step 303.
It is determined whether or not this is the case. The angle of the arm is the predetermined angle θs
If so, in step 304, the lift-up device 50
The side electric drive device 90 is turned on in the descending direction, and the process proceeds to step 305. Then, in step 305, it is determined whether or not the load applied to the driving device 90 has changed abnormally while the lift-up device 50 is being lowered. If there is no abnormal load change, the routine returns and continues to descend to the predetermined angle θs in step 303. If it is determined in step 303 that the angle of the arm has reached the predetermined angle θs, the process proceeds to step 307. In step 307, it is determined whether or not the wheels of the seat device 10 are pulled out. If the wheels have not been pulled out, the process proceeds to step 308, where the driving device 90 is once turned off and the descent is stopped. And step 3
At 09, the wheel electric motor 85 is turned on, and the wheel withdrawal program is executed until the wheels are withdrawn. If it is determined in step 308 that the wheels are pulled out, the process proceeds to step 310 to turn off the wheel electric motor 85, and then proceeds to step 311. In step 311, it is determined whether the lift-up device 50 has been lowered to the lower end. If it has not descended to the descending end, step 312
Then, the driving device 90 is turned on again, and the process proceeds to step 313. In the present embodiment, similarly to the rising end, an always-on type limit switch that is turned off when descending to the descending end is provided, and if it is not turned off, it is determined that it has not yet descended to the descending end. In step 313, the driving device 9
It is determined whether the load applied to 0 has changed abnormally. If there is no abnormal load change, the process returns and continues to descend to the lower end while monitoring the change in the load applied to the drive device 90. If it is determined in step 311 that the drive unit 90 has descended to the lower end, the drive unit 90 is turned off in step 315, and the routine returns. This series of operations is performed when the lift-up device 50 equipped with the seat device 10 is in the vehicle interior, descends while pulling out the wheels of the seat device, and normally moves out of the vehicle interior.

When it is determined in step 305 that there is an abnormal load change, the routine proceeds to step 306, where abnormal processing is performed. The abnormality at this time is, for example, the lift-up device 5
This is the case where the robot hits an obstacle while lowering the 0 arm to the predetermined angle θs.

If it is determined in step 313 that there is an abnormal load change, an abnormal process is performed in step 314. This abnormality was caused by someone leaning on the lift-up device 50 if the arm of the lift-up device 50 was lowered to a predetermined angle θs and hit an obstacle while the wheel was pulled down and lowered again to the lower end. This is the case.

If it is determined in step 302 that the junction connector 110 is not connected, the process proceeds to step 316. In step 316, it is determined whether the lift-up device 50 has been lowered to the lower end. If the lift-up device 50 has not been lowered to the lower end, step 3
At 17, the drive device 90 is turned on and lowered. Then, in step 318, it is determined whether there is an abnormal load change while the lift-up device 50 is being lowered. If there is no abnormal load change, return and continue descending. Step 3
If it is determined in step 16 that the lift-up device 50 has been lowered to the lower end, the process proceeds to step 320, where the drive device 90 is turned off and the process returns. This series of operations is performed when the lift-up device 50 without the seat device 10 is in the vehicle compartment and is normally moved out of the vehicle compartment while being lowered.

If it is determined in step 318 that there is an abnormal load change, an abnormal process is performed in step 319. This abnormality is, for example, when the load applied to the drive device 90 changes abnormally while the junction connector 110 is not connected. That is, when the seat device 10 is moved out of the vehicle compartment in a state where the connection between the lift-up device 50 and the seat device 10 is incomplete, the lift-up device 50 without the seat device 10 is in the vehicle compartment, and If the vehicle hits an obstacle while being moved out of the vehicle cabin while someone is
For example.

In this embodiment, the ascending or descending operation is performed while the ascending switch or the descending switch is being operated, and the operation is immediately stopped when the ascending switch or the ascending switch is released halfway. When the down switch is operated, the up or down operation may be continued until the down switch is moved to the down end or the up end or an abnormal state occurs. Further, in the present embodiment, as means for determining the connection state between the seat device 10 and the lift-up device 50, a connector connection confirmation means for receiving a connector connection confirmation signal via the junction connector 110, and a connection confirmation by a limit switch. Although the sensors are used together, only one of them may be used. The operation of the lift-up device 50 at the time of lifting is not limited to the flowchart shown in FIG. Further, the operation of the lift-up device 50 at the time of lowering is not limited to the flowchart shown in FIG. In this embodiment, the angle of the arm is
Although the determination is made based on 0, various methods can be used, such as determination by counting the number of pulses output from the pulse generator of the load change detector 152.

In this embodiment, the load change detecting device 152 is configured using a pulse generator, but need not be a device using a pulse generator.

[0067]

As described above, the vehicle seat device according to the first and second aspects detects an abnormality based on a connection state between the seat device and the lift-up device and a change in load applied to the drive device. An abnormality detection device is provided. In the present invention, an abnormal state can be reliably detected with a simple configuration, so that safety is improved. Further, by using the vehicle seat device according to the third to sixth aspects, an abnormal state can be reliably detected with a simpler configuration.

[0068]

[Brief description of the drawings]

FIG. 1 is a schematic view of an embodiment of a vehicle seat device according to the present invention.

FIG. 2 is a perspective view of an embodiment of the vehicle seat device of the present invention.

FIG. 3 is an overall perspective view of the seat device.

FIG. 4 is a side view showing a state where the postures of front wheels and rear wheels are changed.

FIG. 5 is a side view showing how the attitude of the front wheels is changed.

FIG. 6 is a plan view showing how the attitude of the front wheels is changed.

FIG. 7 is a side view showing how the attitude of the front wheels is changed.

FIG. 8 is a plan view showing how the attitude of the front wheels is changed.

FIG. 9 is a perspective view of the vicinity of a connection portion of the seat device and the vicinity of a connection plate of the lift-up device.

FIG. 10 is a side view showing a state where a connecting plate is connected to the connecting portion.

FIG. 11 is a perspective view showing a state in which a rear frame of the seat frame is connected to a receiving frame of the lift-up device.

FIG. 12 is a perspective view of a lift-up device.

FIG. 13 is a schematic view of one embodiment of a control unit used in the vehicle seat device of the present invention.

FIG. 14 is a side view of the vehicle seat device of the present invention.

FIG. 15 is a diagram illustrating an example of a pulse generator.

FIG. 16 is a circuit diagram of a Hall IC.

FIG. 17 is an explanatory diagram illustrating an example of an output waveform of the pulse generator.

FIG. 18 is a flowchart showing an operation when the lift-up device is raised.

FIG. 19 is a flowchart illustrating an operation when the lift-up device is lowered.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 vehicle seat device 10 seat device 11 seat body 20 seat frame 35 interlocking mechanism 40 connecting portion 45 lock pin 50 lift-up device 53 turntable 54 swing base 55 four-joint link mechanism 56 connecting plate 58 lock pawl 59 receiving frame 60 front wheel 70 Rear wheel 71 Rear wheel stay 77 Attitude regulation guide 80 Moving frame 85 Electric motor 86 Wheel folding device 90 Electric driving device 91 Front wheel stay 105 Positioning pin 110 Junction connector, 110a ... Male side, 110b ... Female side 120 Connection hook 130 Lift Sensor 140 Sheet confirmation sensor 150 Connection confirmation sensor 152 Load change detecting device 153 Falling end limit switch 154 Rising end limit switch 155 Lifting / falling switch 156 Buzzer 157 Swinging limit switch Chi 160 positioning aid device 161 restricting pin (auxiliary positioning members) 162a guide surface (positioning auxiliary surface) 170 a wheel folding the limit switch 171 wheel drawer limit switch 180 the control unit 190 drives shaft 193 Hall IC

Claims (6)

[Claims] 1. A seat device, a lift-up device detachable from the seat device and moving the seat device between a vehicle interior and a vehicle exterior, a drive device of the lift-up device, a seat device, and a lift-up device. A vehicle seat device including an abnormality detection device that detects abnormality based on a change in a load applied to a drive device and a connection state of the vehicle seat. 2. The vehicle seat device according to claim 1, wherein the abnormality detecting device detects the abnormality by a change in the load applied to the driving device when the seat device and the lift-up device are not connected. Sheet equipment. 3. The vehicle seat device according to claim 1, wherein the wheel position sensor is provided in the seat device and detects a position of a wheel of the seat device, and is provided in the seat device and the lift-up device. A vehicle for determining a connection state between the seat device and the lift-up device by receiving a connector connection confirmation signal from a wheel position detection sensor via the signal transmission connector. Sheet equipment. 4. The vehicle seat device according to claim 1, further comprising a connection confirmation sensor that detects that the seat device and the lift-up device are connected, wherein the abnormality detection device confirms connection. A vehicle seat device that determines a connection state between a seat device and a lift-up device based on an output signal of a sensor. 5. The vehicle seat device according to claim 1, further comprising: a pulse generating device that generates a pulse according to rotation of a drive shaft of the driving device, wherein the abnormality detecting device generates the pulse. A vehicle seat device that determines a change in load applied to a drive device based on a pulse generated from the device. 6. The vehicle seat device according to claim 5, wherein the pulse generator has a Hall element that detects passage of a magnet provided on a drive shaft.