JP2000102567A - Wheelchair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the axle to reduce the space between lateral rear wheels so that the getting-on and -off to a vehicle is facilitated and to extend the axle to extend the space between lateral rear wheels so that the movement of the wheelchair can be stably and safely performed by providing a length changing mechanism on the axle of the rear wheels in the wheelchair. SOLUTION: When a helper holds a handle part 13 on the upper end of a back frame part 7, and presses a stand metal fitting 36 by a foot to draw a body frame backward, the stand metal fitting 36 is rotated forward to lift up the body frame. When an operation handle 31 is pulled up from this state to narrow an X-shaped operating rod 25, the axle 2 of rear wheels 1 is slid within an axle support cylinder 3 to reduce the space between the lateral rear wheels 1. A hook metal fitting 34 on the upper part of the operation rod 25 is caught by a stopper 35, the lateral rear wheels 1 are locked in the state where the space between the lateral rear wheels 1 is reduced. Thereafter, when the body frame is pushed forward, the stand metal fitting 36 is sprung up backward by a spring 39, and the body frame is lowered to ground the rear wheels 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheelchair that can be used safely and safely when getting on and off an airplane from an airport lobby and getting on and off a Shinkansen vehicle from inside a station.

[0002]

2. Description of the Related Art Airplanes and Shinkansen vehicles have narrow entrances and passages, so that ordinary wheelchairs with wide rear wheel spaces cannot be used in an airplane or Shinkansen vehicle.

[0003] For this reason, in an airport lobby or the like, a wheelchair for nursing care with a narrow distance between wheels, which can enter an airplane, may be provided.

[0004] However, a wheelchair for nursing care with a narrow wheel spacing has poor stability, so that there is a problem in that the wheelchair may fall when moving in an airport lobby or the like.

Accordingly, an object of the present invention is to provide a wheelchair which does not hinder getting on and off an airplane or a Shinkansen vehicle, and which can be moved stably and safely in an airport lobby or a station yard.

[0006]

According to the present invention, a length changing mechanism is provided on the axle of the rear wheel of a wheelchair, and the length of the axle is shortened when getting on or off an airplane or a Shinkansen vehicle. The distance can be limited, and when moving in the airport lobby or the station yard, the axle is lengthened and the distance between the left and right rear wheels is widened to enable stable and safe movement.

The axle length changing mechanism for the rear wheel can be constructed by dividing the axle into left and right parts and slidably fitting the axle into the axle support cylinder.

In order to keep the rear wheels floating when changing the length of the axle of the rear wheels, the vehicle body frame is provided with a stand mechanism for lifting the rear wheels.

[0009] The armrest is provided with a mechanism that can be flipped up and rotated rearward so as to narrow the left-right distance on the back side of the backrest.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a wheelchair according to the present invention, a length changing mechanism is provided on an axle 2 of a rear wheel 1.

The mechanism for changing the length of the axle 2 is formed by dividing the axle 2 into left and right parts and slidably fitting the divided axle 2 into an axle support cylinder 3 provided on a body frame.

The vehicle body frame includes a seat frame 5 for supporting the left and right sides on the lower surface of the seat 4, a back frame 7 for supporting the back of the backrest 6, and front wheel supports provided before and after the seat frame 5. It comprises a frame portion 8 and a rear wheel support frame portion 9, and the seat frame portion 5 and the back frame portion 7 are formed in series, and the rear wheel support frame portion 9 is formed.
Is provided on the connection frame 10 bridged over the rear portion of the seat frame portion 5.

The rear wheel 1 is rotatably mounted on an axle 2. The front wheel 11 is rotatably attached to a lower end of the front wheel support frame 8 by a rotation shaft 12. Further, the front wheel 11 is rotatable about the axis of the front wheel support frame 8 so that the direction can be changed.

At the upper end of the back frame 7, a handle 13 which is bent rearward is integrally formed. In addition, the front end of the seat frame 5 has a footrest 14 at its lower end.
Is integrally formed with the front frame portion 15 provided with the above.
A reinforcement frame 40 is stretched between the front frame 15 and the rear wheel support frame 9.

On the back of the back frame 7, an armrest support tube 16 is horizontally arranged. The armrest 17 includes a support frame 18 rotatably and slidably fitted into the armrest support tube 16 and an arm frame 19 provided at right angles to the support frame 18. Is installed.

As shown in FIGS. 1 and 2, the armrest 17 is changed from a position where the armrest 17 is used in parallel with the seat 4 by widening the space between the left and right sides to a retracted position where the armrest 17 is rotated to the rear side to narrow the space. It is provided as possible.

The mechanism for changing the position of the armrest 17 is as follows.
It is configured as follows. First, slide notches 21 extending in the left-right direction are provided on both sides of the armrest support tube 16.
The slide notch 21 is provided with the armrest 17.
A stopper pin 22 protruding from the support frame 18 is slidably fitted. The slide cutout 21 of the armrest support tube 16 has an outer cutout 23 formed at an outer end thereof, which is continuous with the slide cutout 21 toward the upper side, and is formed at an inner end thereof. An inner notch 24 cut continuously downward is formed.

The support frame 18 of the armrest 17 is moved relative to the armrest support tube 16 until the stopper pin 22 fitted in the slide notch 21 of the armrest support tube 16 is positioned at the outer end of the slide notch 21. Pull it out and at that position, arm frame 1
When the stopper pin 22 of the support frame 18 is brought into contact with the upper end of the outer notch 23 of the slide notch 21, the arm frame 19 is parallel to the seat 4 as shown by a solid line in FIG. Located in. Then, the arm frame 19 is flipped up from this position, and as shown by a chain line in FIG.
To the lower end of the outer notch 23, the arm frame 1
9 is held in an oblique state located on the back side of the tip of the handle portion 13 when viewed from the side. When the arm frame 19 is moved inward from this state, the stopper pin 22 of the support frame 18 moves along the slide notch 21 and hits the inner end of the slide notch 21. When the arm frame 19 is rotated downward in this state, the stopper pin 22 of the support frame 18 fits into the inner cutout 24, the stopper pin 22 hits the lower end of the inner cutout 24, and the armrest 17 is attached to the back of the backrest 6. It will be in the retracted position on the side.

When returning the armrest 17 from the retracted position on the back side of the backrest 6 to the use position parallel to the seat 4, the arm frame 19 is rotated upward and the arm frame 19 is positioned obliquely above the backrest 6. Then, in this state, the arm frame 19 is pulled out and spread, and then the arm frame 19 is rotated forward to lower the arm frame 19 to a position parallel to the seat 4.

An X-shaped operating rod 2 is provided at the center of the connecting frame 10 for widening the left and right axles 2 slidably fitted in the axle support tube 3 outward or narrowing them inward.
5 is provided. A guide hole 27 is formed in the operating rod support bracket 26 in the up-down direction, and the center rotating shaft 28 of the pair of X-shaped operating rods 25 is slidably fitted in the up-down direction. Has been put in. The lower ends of the pair of X-shaped operating rods 25 are attached to the inner ends of the axle 2 which are slidably fitted in the axle support tube 3, respectively.
Mounted through. A window hole 30 is formed in the front surface of the axle support tube 3 so that an attachment member 29 attached to the lower ends of a pair of X-shaped operating rods 25 can slide in the axial direction along the axle support tube 3. ing. The X-shaped pair of operating rods 25 are designed to be spread right and left around a central rotation shaft 28 or to be fitted in directions overlapping each other. The axle 2 attached to the lower end is pushed outward in the axle support tube 3, thereby increasing the distance between the left and right rear wheels 1. Conversely, when the pair of X-shaped operating rods 25 is fitted, the axle 2 attached to the lower ends of the pair of operating rods 25 is drawn inward in the axle support tube 3 and shortened. The distance between the left and right rear wheels 1 is reduced.

The upper ends of the pair of X-shaped operating rods 25 are
They are connected by a pair of link plates 32 that are folded in half by a central operating handle 31. As shown in FIG. 5, the operating handle 31 is lifted and the pair of link plates 32
Is folded upward to form a pair of X-shaped operating rods 25.
It is shattered. Then, the operating handle 31 is pushed down to extend the pair of link plates 32 as shown in FIG.
When the operating handle 31 is located at a position slightly lower than the pair of extended link plates 32, the pair of X-shaped operating
The rotation shaft 28 of the guide rod 2 of the operating rod support bracket 26
7, a pair of X-shaped operating rods 25 are fixed in an expanded state. As shown in FIG. 5, the pair of link plates 32 are folded in two upwards, and X
In order to hold the pair of operating rods 25 in a close-fitted state, a latch 34 with a spring 33 is provided on one of the upper sides of the pair of operating rods 25, and this latch 34 is attached to the other operating rod 25. To be hooked on the stopper 35 above.

At the lower end of the rear wheel support frame 9, a stand mechanism is provided at the lower end of the rear wheel support frame 9 to prevent the rear wheel 1 from touching the ground when the distance between the rear wheels 1 is widened or shrunk.

The stand mechanism comprises a U-shaped stand fitting 36 whose both ends are bent upwards,
The mounting pin 37 is attached to the rear wheel support frame portion 9 so as to be rotatable, and the stand bracket 36 is rotated forward,
It is constituted by a stopper metal member 38 that rotates integrally with the stand metal member 36 for positioning the body frame in a raised state, and a spring 39 for holding the stand metal member 36 in a state of being flipped rearward.

When the wheelchair according to the present invention is used to move around an airport lobby or station yard, as shown in FIG. 3, the stand bracket 36 is flipped up and the axle 2 is lengthened, that is, left and right. The distance between the rear wheels 1 is increased so as to perform the operation in a stable state.

Before entering a narrow passage such as an airplane or a Shinkansen vehicle, the axle 2 of the rear wheel 1 is shortened as described below so that the interval between the left and right rear wheels 1 is reduced.

First, the caregiver holds the handle 13 at the upper end of the back frame 7 and steps on the stand fitting 36 with his foot.
When the body frame is pulled backward, the stand fitting 3
9 rotates from the state of FIG. 9 (a) to the state of FIG. 9 (b) forward, the body frame is lifted, and a predetermined space is left between the rear wheel 1 and the ground. Next, from this state, the operator holds the operating handle 31 above the X-shaped operating rod 25 and lifts the operating handle 31 upward to move the X-shaped operating rod 25.
As shown in FIG. 5, the axle 2 of the rear wheel 1 slides in the axle support tube 3 in response to the pulling of the lower end of the X-shaped operating rod 25 to narrow the interval between the rear wheels 1. Become. Then, the latch 34 on the upper part of the X-shaped operating rod 25
Is hooked on the stopper 35, and the left and right rear wheels 1
Are locked in a state where the distance between them is small. Thereafter, when the body frame is pushed forward by holding the handle portion 13 at the upper end of the back frame portion 7, the stand fitting 36 is springed up rearward by the spring 39, the body frame is lowered, and the rear wheel 1 is grounded.

Next, the left and right armrests 17 are flipped up, rotated rearward, the gap between the armrests 17 is reduced, and the armrests 17 are lowered to the back side of the backrest 6 as shown in FIG. The distance between the narrow rear wheels 1 should be the same.

In this state, the rear wheel 1 and the armrest 1
Since the intervals of 7 are narrowed, it is possible to move even in a narrow passage.

[0029]

As described above, the wheelchair according to the present invention can increase or decrease the distance between the rear wheels, so that it can be moved in the airport lobby or the station yard, and can be used for airplanes and Shinkansen vehicles. Getting on and off can be performed safely and without any trouble.

[Brief description of the drawings]

FIG. 1 is a perspective view of a state where a stand is lowered and a body frame is raised.

FIG. 2 is a side view showing a state where a stand is raised and an axle of a rear wheel is extended.

FIG. 3 is a rear view of FIG. 2;

FIG. 4 is a partially enlarged perspective view showing a state where an X-shaped operating rod is expanded.

FIG. 5 is a rear view of a state in which a stand is lowered, a body frame is raised, and an axle of a rear wheel is shortened.

FIG. 6 is a partially enlarged perspective view showing a state where a stand is lowered.

FIG. 7 is a partially enlarged view of a state in which the axle of the rear wheel is slidably fitted in the axle support cylinder.

8 is a sectional view taken along line CC of FIG. 7;

FIG. 9A is a partially enlarged view of a state in which a stand is raised,
(B) is a partially enlarged view of a state where the stand is lowered.

FIG. 10 is an enlarged sectional view taken along line AA of FIG. 3;

FIG. 11 is an enlarged sectional view taken along line BB of FIG. 5;

[Description of Signs] 1 rear wheel 2 axle 3 axle support tube 4 seat 5 seat frame 6 backrest 7 back frame 8 front wheel support frame 9 rear wheel support frame 10 connecting frame 11 front wheel 12 rotation shaft 13 handle Part 14 Footrest 15 Front frame part 16 Armrest support cylinder 17 Armrest 18 Support frame 19 Arm frame 20 Pad 21 Slide notch part 22 Stopper pin 23 Outer notch part 24 Inner notch part 25 Working rod 26 Working rod support bracket 27 Guide hole 28 Rotating shaft 29 Mounting member 30 Window hole 31 Operating handle 32 Link plate 33 Spring 34 Hook 35 Stopper 36 Stand metal 37 Mounting pin 38 Stopper metal 39 Spring 40 Reinforcement frame

Claims (3)

[Claims] 1. An axle length changing mechanism for a rear wheel,
A wheelchair that allows the distance between the left and right rear wheels to be increased or reduced. 2. The wheelchair according to claim 1, further comprising a stand mechanism provided at a lower rear portion of the body frame so as to lift the body frame. 3. The wheelchair according to claim 1, further comprising an armrest rotatable on the back side of the backrest and capable of narrowing a space between the left and right sides.