JP2012090943A - Lift up seat for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lift up seat for a vehicle reducing cost by decreasing a number of parts for deploying and retracting wheels of a seat device.SOLUTION: In the lift up seat for the vehicle constituted of the seat device used in the inside and the outside of a vehicle interior and a lift up device for moving the seat device to the inside and the outside of the vehicle interior, the seat device has a frame for supporting an occupant, the wheels arranged in the front and rear positions of the frame, an interlocking mechanism for interlockingly retracting and deploying the wheels in a fore and aft direction, a driving device for driving the interlocking mechanism, the interlocking mechanism has front wheel stays and rear wheel stays for vertically rotatably supporting the wheels and link arms for coupling the front wheel stays and the rear wheel stays, the driving device has a pipe for coupling both the rear wheel stays, a sector gear fixed to the pipe, and a motor for driving the sector gear, and a rotation transmitting mechanism is interposed between the motor and the sector gear.

Description

  The present invention relates to a vehicle lift-up seat including a seat device that can be used inside and outside a vehicle interior, and a lift-up device for moving the seat device between the vehicle interior and the vehicle interior.

  Conventionally, a seat device that can be used as a wheelchair outside a vehicle compartment and can be used as a seat on which a passenger sits in the vehicle compartment, and a lift-up device for connecting the seat device to move between the vehicle compartment and the vehicle compartment For example, a vehicle lift-up seat described in Patent Document 1 has been proposed. The vehicle lift-up seat device includes an interlocking mechanism for interlocking and folding the front and rear wheels, and the interlocking mechanism includes a front wheel stay and a rear wheel stay that are supported by the seat frame so as to be rotatable up and down. A structure including a moving frame that is movably supported by the seat frame and moves by a driving device, a front wheel link arm that connects the moving frame and the front wheel stay, and a rear wheel link arm that connects the moving frame and the rear wheel stay. is doing. The drive device includes an electric motor, a screw shaft that is rotated by the electric motor, and a nut that is attached to the moving frame and meshes with the screw shaft, and the moving frame is moved by the rotation of the screw shaft.

Japanese Patent No. 3127904

  In the structure shown above, when storing the wheel when moving the seat device into the vehicle compartment, or when deploying the wheel after the seat device moves out of the vehicle compartment from the vehicle compartment, the wheels are stored and deployed in conjunction with each other. Therefore, a moving frame supported by the seat frame is required. In order to operate the moving frame in conjunction with the front wheel and the rear wheel, it is necessary to separately provide a front wheel link arm that connects the front wheel stay and the moving frame, and a rear wheel link arm that connects the moving frame and the rear wheel stay. There is. For this reason, the number of parts of the sheet device may increase and the cost may increase.

  The present invention has been made to solve the above-described problems, and provides a vehicle lift-up seat that is reduced in cost by reducing the number of parts for deploying and storing wheels provided in a seat device. With the goal.

  In order to solve the above-described problem, in the lift-up seat for a vehicle according to claim 1, a seat device that can be used as a wheelchair outside the vehicle compartment and can be used as a seat in the vehicle compartment, and a seat device that can be connected to the seat device and installed in the vehicle compartment. And a lift-up seat for a vehicle comprising a lift-up device that moves to the outside of the vehicle compartment, wherein the seat device stores a frame that supports an occupant, front and rear wheels of the frame, and the front and rear wheels linked to each other. And a driving mechanism that drives the interlocking mechanism. The interlocking mechanism includes a front wheel stay and a rear wheel stay that support the front and rear wheels so as to be rotatable up and down with respect to the frame. A technical feature is that the stay and the rear wheel stay are connected by a link arm.

  In the lift-up seat for a vehicle according to claim 2, the driving device includes a motor that drives the interlocking mechanism, a sector gear that is rotated by the motor, and a pipe that fixes the sector gear and connects the left and right rear wheel stays. A technical feature is that a rotation transmission mechanism is interposed between the sector gears.

  According to the vehicle lift-up seat according to the first aspect, the mechanism for storing the wheels of the seat device can be realized with a simple structure, so that the vehicle lift-up seat is inexpensive.

  According to the lift-up seat for a vehicle according to the second aspect, it is possible to reduce a load applied to the motor of the drive device that is generated when the wheels are retracted, so that the failure of the motor is reduced.

It is a figure which shows the sheet | seat apparatus of this invention. It is a figure which shows the disassembled perspective view of the lift-up apparatus of this invention. It is the side view which looked at the seat device of the present invention from the wheel side at the time of wheel deployment. It is a figure which shows the state which the seat apparatus of this invention stored the wheel.

Embodiments of the present invention will be described below.
As shown in FIG. 1, a lift-up seat 10 for a vehicle according to the present invention includes a seat device 20 that can be used outside and inside the vehicle interior, and as shown in FIG. It is comprised with the lift-up apparatus 30 for moving between the outdoors.

First, the sheet apparatus 20 will be described.
The seat device 20 is configured to be connectable to and detachable from a seat support base 38a of a lift-up device 30 to be described later. As shown in FIGS. 1 and 3, a seat cushion that supports an occupant and a seat that serves as a back of the occupant. A frame 21 composed of a back, wheels 22 at the front and rear positions of the frame 21, an interlocking mechanism 23 that stores and unfolds the wheels 22 in front and rear interlocking, and a drive device 24 that drives the interlocking mechanism 23 are provided.

  The frame 21 is a framework that supports an occupant, and has a wheel 22 (front wheel 22a) via a front wheel stay 23a, which will be described later, at a front position on the side with respect to the traveling direction of the seat device 20, and will be described later at a rear position. A side frame 21a provided with wheels 22 (rear wheels 22b) via a rear wheel stay 23b, a front frame 21b provided so as to bridge the front of both side frames 21a, and a rear frame provided so as to bridge the rear of both side frames 21 21c.

  The wheels 22 are provided at front and rear positions of the side frame 21a of the frame 21 via front wheel stays 23a and rear wheel stays 23b. The front wheel stay 23a and the rear wheel stay 23b are provided so that the wheel 22 can be rotated in the vertical direction, and the front wheel 22a is provided by attaching a bifurcated bracket 22c that can rotate around the axis to the front wheel stay 23a. The front wheel 22a is held so as to rotate up and down and rotate around the axis.

  The interlocking mechanism 23 is a mechanism that unfolds and retracts the wheels 22 provided at the front and rear positions of the side frame 21a of the frame 21, and includes a front wheel stay 23a and a rear wheel stay 23b including the wheels 22, and the front wheel stay 23a. And the link arm 23c which connects the rear-wheel stay 23b is comprised. The link arm 23c is a member for simultaneously interlocking the front and rear wheels 22, and a driving device 24 described later is driven to rotate up and down in conjunction with the front wheel stay 23a and the rear wheel stay 23b to expand or retract the wheel 22. I do. In the present invention, the front wheel stay 23a and the rear wheel stay 23b are connected by the link arm 23c. However, any structure may be used as long as it can be connected.

  The driving device 24 connects a motor 24a as power for driving the interlocking mechanism 23, a sector gear 24b that rotates up and down as the motor 24a rotates, and a sector gear 24b fixed to connect the left and right rear wheel stays 23b. A rotation transmission mechanism 25 is provided between the motor 23a and the sector gear 24b. Further, the motor 24 a, the sector gear 24 b, and the rotation transmission mechanism 25 of the driving device 24 are arranged on either one of the both side frames 21 a of the frame 21.

  The sector gear 24b has a substantially fan shape, and includes a through hole 24c that penetrates and fixes the pipe 24e and external teeth 24d that form irregularities on the outer edge. The external teeth 24d can mesh with a gear portion 25b included in the rotation transmission mechanism 25 described later, and drives the interlocking mechanism 23 by rotating the sector gear 24b up and down depending on the rotation direction of the motor 24a.

  The rotation transmission mechanism 25 is provided between the motor 24a and the sector gear 24b. The rotation transmission mechanism 25 is a load applied to the motor 24a from the sector gear 24b generated when the occupant is seated or when the interlock mechanism 23 is driven and the rear wheel stay 23b rotates up and down. The output unit 25c is stopped by the brake device 25d when the motor 24a does not operate, the input unit 25a transmits the power of the motor 24a, and the input unit 25a to the output unit 25c. Is provided with a gear portion 25b composed of a sun gear, a planetary gear or the like for transmitting power to the motor.

Next, the lift-up device 30 that is provided in the vehicle compartment and moves the seat device 20 to the outside of the vehicle compartment will be described.
As shown in FIG. 2, the lift-up device 30 includes a floor fixing portion 31 disposed on the floor in the vehicle compartment, a slide mechanism 32 provided on the floor fixing portion 31 so as to be movable back and forth, and the slide mechanism 32. The rotating mechanism 33 that changes the orientation of the seat device 20 that has been released, the lifting mechanism 34 that moves the seat device 20 rotated by the rotating mechanism 33 from the vehicle interior to the exterior of the vehicle interior, and performs the lifting operation, and the lifting mechanism 34 An outer slide mechanism 38 that further moves the seat device 20 that has moved to the vicinity of the road surface outside the vehicle toward the outside of the vehicle room or the direction of the vehicle interior is provided.

  The floor fixing portion 31 fixes the seat device 20 to the vehicle floor F, and lays a pair of left and right rail members 31a on the surface of the vehicle floor F substantially parallel to the door opening. The rail member 31a has a concave cross section, and is provided with a screw shaft 31b (not shown) and a nut 31c (not shown) that allow a slide mechanism 32 (described later) to move inside the concave shape. A foot 31d for fixing to the vehicle floor F is provided.

  The slide mechanism 32 is a mechanism that moves the seat device 20 in the front-rear direction with respect to the traveling direction of the vehicle, and a slide base 32 a is provided on the rail member 31 a of the floor fixing portion 31 so as to be slidable. The slide base 32a includes a slide motor 32b that drives a screw shaft 31b and a nut 31c included in the rail member 31a of the floor fixing portion 31a, a rotating disk 32c that rotates a rotating mechanism 33 described later, and a rotating disk 32c. A rotary motor 32d for driving is provided.

  The rotation mechanism 33 is a mechanism that rotates the seat device 20 between a position facing the traveling direction of the vehicle and a position facing the door opening, and a rotation substrate 33a is provided coaxially with the turntable 32c of the slide mechanism 32. The rotating substrate 33a includes an elevating motor 33b that operates an elevating mechanism 34 described later, an elevating rotary shaft 33c that rotates when the elevating motor 33b is driven, and a guide roller 33d that supports the elevating mechanism 34 that performs the elevating operation. Prepare.

  The elevating mechanism 34 is a mechanism for moving the seat device 20 from the vehicle interior to the vehicle interior or from the vehicle interior to the vehicle interior. The elevating mechanism 34 spans the base 35 and a block-shaped base 35 provided at the front and rear positions of the rotation mechanism 33. A link arm 36 is provided.

The base 35 has a front base 35a at the front position of the rotation mechanism and a rear base 35b at the rear position. The left and right front bases 35a are joined by a front bracket 35c, and the left and right rear bases are joined by a rear bracket 35d. Here, the front bracket 35c is provided with a nut member 35e so as to be connectable to an outer slide rotation shaft 38b that enables an outer slide mechanism 38, which will be described later, to move in the vehicle interior and exterior directions, and the rear bracket 35d is a rotation mechanism. A nut member 35f is provided so as to be connectable to the lifting / lowering rotating shaft 33c included in 33.

  The link arm 36 has a substantially linear shape in which the front base portion 35 a and the rear base portion 35 b are curved, and the base portion 35 and the link arm 36 constitute a four-bar linkage mechanism 37. The four-bar linkage mechanism 37 is driven by the nut member 35f of the rear bracket 35e moving the lifting / lowering rotation shaft 33c of the rotation mechanism 33.

  The outer slide mechanism 38 has a structure that can be connected to and disconnected from the seat device 20, and includes a seat support base 38 a that supports the seat device 20, and a seat support base 38 a that is moved near the road surface outside the vehicle compartment by the elevating mechanism 34. An outer slide rotation shaft 38b that moves in the vehicle interior direction and the vehicle interior direction, and an outer slide motor 38c that rotates the outer slide rotation shaft 38b are provided.

  The outer slide rotation shaft 38b is a rotation shaft that rotates when driven by an outer slide motor 38c, which will be described later. The outer slide rotation shaft 38b can be connected to a nut member 35e included in the front bracket 35c, and moves the nut member 35e by rotating. The outer slide mechanism 38 is moved in the vehicle interior direction and the vehicle exterior direction.

Below, the Example of the lift up seat 10 for vehicles of this invention is described.
First, the operation of the seat device 20 used outside the vehicle compartment connected to the lift-up device 30 provided in the vehicle compartment and storing the wheels 22 will be described.

  An occupant sitting on the seat device 20 or a caregiver of the occupant drives the lift-up device 30 provided in the vehicle to move the seat support base 38a of the outer slide mechanism 38 to the vicinity of the road surface. Here, the outer slide mechanism 38 of the lift-up device 30 in the vehicle compartment rotates the lifting / lowering rotating shaft 33c by driving the lifting / lowering motor 33b included in the rotating mechanism 33, and the nut member 35f included in the rear bracket 35e of the lifting / lowering mechanism 33. Is moved toward the road surface R outside the vehicle compartment by the four-bar linkage mechanism 37 of the elevating mechanism 34.

  In a state where the seat support base 38a included in the outer slide mechanism 38b of the lift-up device 30 has moved to the vicinity of the road surface outside the vehicle compartment, the seat device 20 approaches the outer slide mechanism 38b and moves the seat support base 38a to the frame by the occupant's operation. 21 is connected to the lift-up device 30 by being inserted below.

  The lift-up device 30 connected to the seat device 20 lifts the seat device 20 upward (in the vehicle interior direction) by driving a lifting motor 33b included in the rotation mechanism 33. However, when the seat device 20 lifts to a certain height. Stop once.

The seat device 20 stopped by the lift-up device 30 while the wheels 22 are separated from the road surface moves the interlocking mechanism 23 by driving the driving device 24 in order to store the wheels 22. The driving device 24 drives the motor 24a to rotate the sector gear 24b downward (counterclockwise in FIG. 3), thereby rotating the pipe 24e and moving the link arm 23c rearward and upward of the seat device 20. Here, since the pipe 24e moving rearward and upward of the seat device 20 is connected to the rear wheel stay 23b, the driving of the interlocking mechanism 23 is started.

  The interlocking mechanism 23 that is driven by the pipe 24e rotating and moving the link arm 23c rearward and upward of the seat device 20 has a front wheel that the rear wheel stay 23b rotates around the pipe 24e and is connected via the link arm 24c at the same time. The stays 23a are rotated in conjunction with each other to store the wheels 22. Here, since the rear wheel stay 23b rotates around the pipe 24e as a center of rotation, a load (weight) may be applied from the sector gear 24b to the motor 24a when the wheel 22 is stored. Therefore, the load applied to the motor 24a is reduced.

  As shown in FIG. 4, when the lift device 30 confirms that the seat device 20 has finished storing the wheels 22, the lift device 30 moves the lift device 34 again to move the seat device 20 into the vehicle compartment. Here, the seat device 20 that has moved into the vehicle compartment is rotated from the position facing the door opening by the rotation mechanism 33 of the lift-up device 30 to the position facing the traveling direction of the vehicle, and slid to a predetermined position by the slide mechanism 32. By doing so, it can be used as a seat.

  Next, an operation in which the seat device 20 used in the vehicle compartment moves outside the vehicle compartment and is separated from the lift-up device 30 will be described.

  After the seat device 20 is moved to the rotation mechanism 33 by the slide mechanism 32 of the lift-up device 30, the seat device 20 is rotated by the rotation mechanism 33 from the position facing the traveling direction of the vehicle to the position facing the door opening, and by the lifting mechanism 34 Make a move to. Here, the lifting mechanism 34 of the lift-up device 30 moves outside the vehicle compartment of the seat device 20 when the outer slide mechanism 38 reaches a position where the seat device 20 can safely deploy the wheel 22 (wheel deployment position). Stop moving once.

  The seat device 20, which has been lifted and moved to the wheel deployment position outside the vehicle compartment, drives the driving device 24 that deploys the wheels 22 to move the interlocking mechanism 23. The drive device 24 rotates the pipe 24e by driving the motor 24a so as to rotate in the direction opposite to the wheel retracting direction and rotating the sector gear 24b upward (clockwise rotation in FIG. 3), and the link arm 23c with the seat device. 20 Moves downward and deploys the wheel 22. Here, since the pipe 24e moving to the lower side of the seat device 20 is connected to the rear wheel stay 23b, the driving of the interlocking mechanism 23 is started.

  The interlocking mechanism 23 that is driven by moving the pipe 24e below the seat device 20 rotates while the rear wheel stay 23b rotates around the pipe 24e and the front wheel stay 23a that is connected via the link arm 23c. The wheel 22 is expanded.

  As shown in FIG. 3, when the lift device 30 confirms that the seat device 20 has finished deploying the wheels 22, the lift-up device 30 moves the elevating mechanism 34 again to move the outer slide mechanism 38 outward in the vehicle compartment. The wheels 22 of the seat device 20 are installed on the road surface. Here, the outer slide mechanism 38 moves by moving the nut member 35e of the front bracket 35c by driving the outer slide motor 38c and rotating the outer slide rotation shaft 38b.

  Since the seat device 20 with the wheels 22 installed on the road surface R can travel freely, it can be separated from the seat support base 38a of the outer slide mechanism 38.

DESCRIPTION OF SYMBOLS 10 Vehicle lift up seat 20 Seat apparatus 21 Frame 22 Wheel 23 Interlocking mechanism 23a Front wheel stay 23b Rear wheel stay 23c Link arm 24 Drive device 24a Motor 24b Sector gear 24c Through hole 24d External tooth 25 Rotation transmission mechanism 25b Gear part 30 Lift up device 31 Floor fixing part 32 Slide mechanism 33 Rotating mechanism 34 Lifting mechanism 35 Outer slide mechanism R Road surface

Claims (2)

A seat device that can be used as a wheelchair outside the vehicle compartment and as a seat inside the vehicle compartment;
A vehicle lift-up seat that can be connected to the seat device and includes a lift-up device that moves the seat device to and from the vehicle interior,
The seat device includes a frame that supports an occupant,
Wheels on the front and rear of the frame;
An interlocking mechanism that interlocks the front and rear wheels to store and deploy;
A driving device for driving the interlocking mechanism,
The interlock mechanism includes a front wheel stay and a rear wheel stay that support the front and rear wheels so as to be rotatable up and down with respect to the frame,
A lift-up seat for a vehicle, wherein the front wheel stay and the rear wheel stay are connected by a link arm. The drive device includes a motor that drives the interlock mechanism;
A sector gear rotated by the motor;
The sector gear is fixed and a pipe connecting the left and right rear wheel stays,
2. The vehicle lift-up seat according to claim 1, wherein a rotation transmission mechanism is interposed between the motor and the sector gear.

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