JPS6217068Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application This invention relates to improvements in wheelchairs, and in particular to wheelchairs that can be moved laterally when necessary.

B. Prior Art Wheelchairs that can be moved back and forth using a motor have been developed. In addition, a wheelchair has been developed in which the left and right wheels are separately driven by motors and can turn to the right or left.

However, this type of wheelchair cannot be moved laterally to the left or right, so it requires extremely advanced driving skills to reach a table or move in a narrow space. The drawback was that it could not be moved quickly to the desired position. In particular, it had the disadvantage of being inconvenient to move in narrow spaces, such as indoors.

C. Purpose of the invention This invention was developed with the aim of eliminating this drawback of conventional wheelchairs, and the important purpose of this invention is to be able to move not only in the front-back direction but also in the left-right and lateral directions. To provide a wheelchair that allows a person with a disability to move easily and accurately to a desired position, and can be conveniently used even in a small room.

D. Means to solve the conventional problems The bottom of the wheelchair is equipped with lateral drive wheels exclusively for left and right lateral movement. The lateral drive wheels are mounted so as to be movable up and down relative to the main drive wheels that move the wheelchair back and forth. The lateral drive wheels are connected to the motor via a power transmission means such as a speed reducer.

E. Effect When the lateral drive wheels are lower than the main drive wheels, the lateral drive wheels contact the floor or the ground (hereinafter simply referred to as the ground), and the main drive wheels leave the ground. When the lateral drive wheels are rotated by the motor in this state, the wheelchair moves laterally to the left and right.

When the lateral drive wheels are located above the main drive wheels, the wheelchair is also moved in the front-rear direction by the main drive wheels.

F. Example Hereinafter, an example of this invention will be described based on the drawings.

The wheelchair shown in FIG. 4 has wheels for traveling on the bottom surface. As shown in Figures 1 to 3, the running wheels include free running wheels 1 placed at the four corners of the underside of the wheelchair, main drive wheels 2 that move the wheelchair back and forth, and wheels that move the wheelchair left and right. It is provided with lateral drive wheels 3 for moving the vehicle in the direction.

The free running wheel 1 is a hanging wheel whose axis can rotate freely in a horizontal plane so that the wheelchair can move in any direction, and cannot move up and down so that the wheelchair is always held horizontally to the ground. installed in condition.

The main drive wheels 2 are, as shown in FIGS. 1 and 2,
They are mounted on both sides of the tilting frame 4, and each is connected to a separate deceleration drive motor 5 to rotate in the forward or reverse direction.

The tilting frame 4 has one end attached to the main body 7 via a hinge 6 so that the main drive wheel 2 can move up and down by tilting itself, and the other end is pushed down by a push spring 8. The vicinity of the push spring 8 is lifted up by a pulling wire 9.

When the tilting frame 4 is not pulled up by the pulling wire 9, the left side of the tilting frame 4 is lowered by the push spring 8 in FIG. 2, and the main drive wheel 2 is pressed onto and in contact with the ground. When the main drive wheels 2 are rotationally driven in this state, the wheelchair moves back and forth.

The main drive wheels 2 are driven by separate deceleration motors 5.
They can move forward and backward while rotating and turning separately, or they can rotate in opposite directions and turn on the spot.

A deceleration motor 5 that drives the main drive wheel 2 is controlled by a lever 10 disposed on the armrest. lever 10
turns on and off a switch (not shown) that controls the rotational direction and operating state of the deceleration motor 5.

The pull-up wire 9 is wound or unwound by rotating the shaft of the winding motor 11 in the forward or reverse direction.

As shown in FIG. 1, the lateral drive wheels 3 include two
There are a total of four sets, and they are attached to the main body 7 via a horizontal arm 12 so that they can all move up and down as one.

The horizontal arm 12 has an axis 1 of the transverse drive wheel 3 at one end.
4 is inserted through it, and the other end is attached to the main body 7 via a pin 13 so as to be freely tiltable.

The shaft 14 is rotatably supported by the horizontal arm 12 via a bearing sleeve 15, horizontal drive wheels 3 are fixed to both ends of the shaft 14, a pulling wire 19 is connected to the middle of the bearing sleeve 15, and A guide shaft 16 through which a push spring 18 is inserted is fixed to both sides of the bearing cylinder 15 and extends upward.

The pull-up wire 19 is wound around the shaft of the take-up motor 17, and is wound up or unwound by rotating the take-up motor 17 forward or reverse.

The push spring 18 pushes each lateral drive wheel 3 downward, and when the shaft 14 is not lifted by the pulling wire 19, the lateral drive wheel 3 is pressed and brought into contact with the ground.

Winding motors 11, 1 for main drive wheels 2 and lateral drive wheels 3
7, when one is rotated forward, the other is rotated in reverse, lifting either the main drive wheel 2 or the lateral drive wheel 3,
Some other increases will be lifted.

The operation of both winding motors 11 and 17 can be controlled by a switch turned on and off by a lever 21 on the armrest.

As shown in FIG.
A pulley 22 is fixed to the
It is connected to the shaft of a lateral drive motor 23 via a belt or chain.

As shown in FIGS. 1 to 3, the lateral drive wheels 3
According to the structure in which the main drive wheels 2 are raised when lowering the wheelchair, and the wheelchair is always held horizontally by the free running wheels 1 at the four corners, the wheelchair is always held horizontally even when moving back and forth or sideways. Furthermore, the wheelchair does not move up or down when switching.

However, the main drive wheels 2 and the lateral drive wheels 3 can be moved back and forth or sideways if either one of them can be switched to make contact with the ground. Therefore, although not shown, a structure in which the main drive wheels 2 are fixed and the lateral drive wheels 3 can be protruded or pulled up downward may also be adopted. Alternatively, a structure may be adopted in which the lateral drive wheels 3 are fixed and the main drive wheels 2 are protruded or pulled up downward.

G Effect The wheelchair of this invention can move the wheelchair laterally to the left and right by lowering the lateral drive wheels relative to the main drive wheels. For this reason, for example, when moving to a predetermined position on the table or moving laterally along the table, the feature of being able to move simply, easily, and smoothly is realized.

In addition, even in a small room, it can be moved freely forward, backward, left, and right, making it extremely convenient for people with walking disabilities.

[Brief explanation of the drawing]

1 to 3 are a bottom view, a side view, and a front view showing the bottom of the wheelchair, and FIG. 4 is a side view of the wheelchair. DESCRIPTION OF SYMBOLS 1... Free running wheel, 2... Main drive wheel, 3... Lateral drive wheel, 4... Tilting frame, 5... Motor, 6
... Hinge, 7 ... Main body, 8 ... Push spring, 9 ... Pulling wire, 10 ... Lever, 11 ... Winding motor, 12 ... Horizontal arm, 13 ... Pin, 14 ...
...Shaft, 15...Bearing sleeve, 16...Guide shaft, 17
... Winding motor, 18 ... Push spring, 19 ... Pulling wire, 21 ... Lever, 22 ... Pulley, 23
... Lateral drive motor.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A lateral drive wheel 3 for moving the wheelchair in left and right directions is provided at the bottom.
is mounted so as to be movable up and down relative to main drive wheels 2 that move the wheelchair back and forth, and furthermore, this lateral drive wheel 3 is connected to a motor 23 via a power transmission means, This lateral drive wheel 3
The wheelchair is configured such that when the main drive wheels 2 are at a lower position, the wheelchair is driven by a motor 23 and the wheelchair is moved laterally. (2) The wheelchair according to claim 1, wherein the lateral drive wheels 3 are four wheels, each arranged near the four corners of the bottom of the wheelchair.