JP2581043Y2 - wheelchair - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheelchair, and more particularly to a wheelchair having a stand for lifting wheels.

[0002]

2. Description of the Related Art A wheelchair for a disabled person or the like to sit and move has been widely known. This wheelchair is used not only outdoors but also indoors, and there is a problem that when entering a room from the outdoors, the interior of the wheel is more contaminated than the dirt on the wheel surface.

In order to prevent the interior of the room from being stained, it is conceivable to wipe off dirt on the surface of the wheel with a wet cloth when entering the room. Particularly, the rear wheel is usually a large wheel. Wiping with a wet cloth was a very complicated operation.

[0004] Therefore, a method of replacing the rear wheel with a wheel for indoor use when entering the room may be considered. However, in such a case, it is necessary to lift the rear wheel, and for that purpose, there is a problem that a disabled person or the like must once get off the wheelchair. In addition, when a disabled person or the like once gets out of the wheelchair and replaces the wheels, it is necessary to support the vehicle body in some way, which is a complicated operation.

[0005] An object of the present invention is to provide a wheelchair having a stand that can easily lift the wheels when such wheels are replaced.

[0006]

The wheelchair of the present invention has a stand for lifting a wheel, the stand comprising a movable rod for lifting the wheel, and a first rod.
And a second lever, a base member, and an urging means for urging the movable rod portion to push up the movable rod portion, and to prevent cooperative rotation between the first lever and the link member in a predetermined state. It has a stopper.

The movable rod portion is provided so as to be guided and moved downward to lift the wheel. In order to move the movable rod portion, the movable rod portion is moved by a first connecting portion separated from one end by a predetermined distance. A first lever is rotatably mounted on the first lever. The link member is attached such that one end is rotatable at a second connecting portion near one end of the first lever. The base member is attached to the wheelchair body, and a third member near the other end of the link member is provided.
The link member is supported so as to be rotatable at the connecting portion.

The second lever is provided above the first lever, and is rotatably supported by the base member at a fourth connecting portion near one end thereof. The stopper pushes down the other end of the first lever, rotates the first lever about the first connecting portion to move the movable rod portion downward, and cooperates with the rotation of the first lever. When the link member is moved to rotate the link member about the third connection portion, the second connection portion crosses the straight line connecting the first connection portion and the third connection portion, and the second connection portion is positioned inside the third connection portion. The first lever and the link member are provided so as to prevent cooperative rotation.

The second lever is provided with a projection. The projection is provided on the first lever and the link member which are prevented from rotating by the stopper when the other end of the second lever is pushed down. And a second connecting portion, which is a connecting portion between the first connecting portion and the second connecting portion, is pushed out of a straight line connecting the first connecting portion and the second connecting portion.

[0010]

The wheelchair of the present invention is provided with a stand for lifting wheels. For this reason, the wheels can be lifted by using the stand portion, and the replacement of the wheels and the like can be easily performed.

The movable rod can be moved downward by depressing the other end of the first lever of the stand, and the wheel can be lifted by grounding the tip of the movable rod. At this time, the movable rod portion is pushed down against the urging force of the urging means. At this time, the first lever rotates around the first connecting portion, and with this rotation, the link member rotates around the third connecting portion in the opposite direction.

By the rotation of the first lever and the link member, the second connecting portion moves so as to approach a straight line connecting the first connecting portion and the third connecting portion, and further crosses the straight line. To move. Until it crosses this straight line, the first lever rotates against the urging force of the urging means, and the movable rod moves downward.
When the first connecting portion is located, the movable rod portion starts to move upward by the rotation of the first lever in the same direction. Therefore,
An urging force is applied by the urging means so that the first lever rotates positively.

According to the present invention, in such a state, that is, in a state where the second connecting portion is located inside the straight line connecting the first connecting portion and the third connecting portion, the first lever and the link are connected. A stopper is provided to prevent rotation in cooperation with the member. Therefore, the rotation of the first lever and the link member is prevented by the stopper, and the urging force of the urging means is received by the stopper. In this state, the states of the first lever, the link member, and the movable rod portion are locked. .

In order to move the movable rod portion upward and return to the original state, the other end of the second lever is pushed down, and the second connecting portion is connected to the first connecting portion by the projection of the second lever. It is pushed out of the straight line connecting the third connecting portion. Thus, the urging force of the urging means acts to rotate the first lever in the reverse direction, and the other end of the first lever moves upward, and the movable rod moves upward to return to the original state. Return.

[0015]

1 is a side view showing a wheelchair according to an embodiment of the present invention, and FIG. 2 is a rear view. Referring to FIGS. 1 and 2, a wheelchair 1 according to the present embodiment includes a front wheel 2 and a rear wheel 3.
And a stand 10 for lifting the rear wheel 3 is provided. FIG. 1 shows a state in which the rear wheel on the near side of the drawing is removed, and the rear wheel 3 shown is located on the far side in the drawing. Stand part 10
Is composed of a movable rod portion 11, a first lever 12, a link member 13, a base member 14, and a second lever 15. The stand 10 lifts the rear wheel 3 when the movable rod 11 moves downward and the lower end of the movable rod 11 contacts the ground.

The movable rod 11 is inserted into a pipe 4 supporting the rear wheel 3. As shown in FIG. 2, the rear wheel 3 is attached by inserting the axle portion 5 into a hole formed in the pipe 4.

FIG. 3 is an enlarged side view of the stand unit 10, and FIG. 4 is a plan view of the same stand unit 10. With reference to FIGS. 3 and 4, the upper part of the movable rod part 11 of the stand part 10 is inserted into the pipe 4 constituting the wheelchair body as described above. A corner portion of the substantially L-shaped first lever 12 and a central portion of the movable rod portion 11 are rotatably connected by a first connection portion 16. Each of the connecting portions including a connecting portion described later is rotatably connected by passing a pin or the like through a hole formed in each member.

In the vicinity of one end of the first lever 12, a second connecting portion 17 is connected to the vicinity of the lower end of the link member 13. In the vicinity of the upper end of the link member 13, the base member 14 and the third connecting portion 18 are rotatably connected. The base member 14 is attached to the pipe 4. A second lever 15 is provided above the first lever 12, and a portion near one end of the second lever 15 is attached to the base member 14 by a fourth connecting portion 19. Further, a projection 15a extending downward is formed at a portion separated from the one end by a predetermined distance.

FIGS. 5 and 6 show the second lever 15, FIG. 5 is a side view, and FIG. 6 is a plan view. 5 and 6, the second lever 15 has a U-shaped cross section at the other end, and has two plate portions 15d and 15e.
Is formed. From the central portion to one end, the bridge portion 15c has a shape as if removed, and the two plate portions 15d,
15e. In the vicinity of one end, a through hole 15b is formed in each of the two plate portions 15d and 15e. Further, a projection 15a extending downward is formed on each of the plate portions 15d and 15e.

7 to 9 show the base member 14, FIG. 7 is a side view, FIG. 8 is a plan view, and FIG. 9 is a front view. As shown in FIG. 8, the base member 14 has a substantially U-shape, and the pipe 4 (FIG.
(Shown in FIG. 2). Base member 1
A projection 14a protruding outward is provided on the upper part of
Are formed respectively. Also, a protruding portion 14b protruding outward is formed at the tip portion. Further, as shown in FIG. 7, through holes 14c and 14d are respectively formed on both side walls.

The through hole 14c of the base member 14 shown in FIG.
And the through-hole 15b of the second lever 15 shown in FIG.
A pin is provided to pass through 5b. Thereby, the fourth connecting portion 19 shown in FIG. 3 is formed, and the second lever 15 is rotatably supported. When the other end of the second lever 15 is pulled upward, an upper portion near one end of the second lever 15 comes into contact with the protrusion 14 a of the base member 14.

10 to 12 show the link member 13, FIG. 10 is a side view, FIG. 11 is a plan view, and FIG. 12 is a front view. As shown in FIGS. 10 to 12, the link member 13 connects the two plate portions 13 d and 13 e to the bridge portion 1.
3a. As shown in FIG. 10, through holes 13b and 13c are formed in the two plate portions 13d and 13e, respectively. Through hole 13
b is disposed so as to overlap with the through hole 14d of the base member 14 shown in FIG.
Of the connecting portion 18. Thus, the link member 13 is supported on the base member 14 so as to be rotatable about the third connecting portion 18. When the rotatably supported link member 13 is rotated forward, the bridge portion 13a
Abuts on the projection 14b of the base member 14, as shown in FIG.

FIGS. 13 and 14 show the first lever 12, FIG. 13 is a side view, and FIG. 14 is a plan view.
13 and 14, the first lever 12 is formed by connecting two plate portions 12e and 12f with a bridge portion 12d, and the bridge portion 12d is removed from the center portion to one end. Two plate parts 1
Only 2e and 12f are provided. In the lower part of one end,
A projection 12a protruding outward is formed. As shown in FIG. 13, through-holes 12b and 12c are formed in the respective plate portions 12e and 12f in the substantially L-shaped corner portion and near one end. FIG.
The through-hole 12b shown in FIG. 3 is disposed so as to overlap the through-hole 13c of the link member 13 shown in FIG.
Is configured.

FIG. 15 and FIG. 16 show the movable rod portion 11, and FIG.
FIG. 16 is a plan view. As shown in FIGS. 15 and 16, the movable rod portion 11 is formed of a pipe-like body, and has a flange portion 1 extending inward at an upper end thereof.
1c is formed, and a hole 11b is formed in the flange portion 11c. Further, a through hole 11a is formed substantially at the center of the movable rod portion 11. The lower end of the movable rod portion 11 is a portion that comes into contact with the ground when lifting the wheel, and for example, a cap or the like is fitted therein.

The through hole 1 of the movable rod 11 shown in FIG.
1a and the through-hole 12c of the first lever 12 shown in FIG. 13 are arranged so as to overlap, and a pin is passed through these through-holes to form the first connecting portion 16 shown in FIG.

FIG. 17 is a side view showing a state where the components of the stand described above are combined. As described above, the upper part of the movable rod portion 11 is inserted into the pipe 4. A spring mounting member 20 into which a coil-shaped spring 22 is inserted is provided inside the pipe 4. The upper part of the spring mounting member 20 is fixed in the pipe 4 by a fixing pin 6. The upper end of the panel 22 is in contact with the flange portion 11c above the movable rod portion 11, and the lower end is in contact with the spring receiving portion 21 provided at the lower end of the spring mounting member 20. The spring 22 urges the upper flange portion 11c of the movable rod portion 11 to push it upward.

FIG. 18 shows a state in which the other end of the first lever 12 is pushed down. When the other end of the first lever 12 is pressed down, the movable rod portion 11 connected by the first connecting portion 16 moves downward. Along with this, the spring 22 whose upper end is in contact with the flange portion 11c of the movable rod portion 11 is compressed. Therefore, the other end of the first lever 12 is pushed down while resisting the urging force of the spring 22.

When the other end of the first lever 12 is pushed down, the first lever 12 rotates clockwise about the first connecting portion 16. Accordingly, the second connecting portion 17 rotates clockwise, and accordingly, the link member 13 rotates counterclockwise around the third connecting portion. Due to the clockwise rotation of the first lever 12 and the counterclockwise rotation of the link member 13, the second connecting portion 17 becomes a straight line A connecting the first connecting portion 16 and the third connecting portion 18. Approaching. When the second connecting portion 17 is located on the straight line A, the movable rod portion 11 is located at the lowest position. Until this state, the clockwise rotation of the first lever 12 is made against the urging force of the spring 12.

Next, when the second connecting portion 17 is positioned inside the straight line A, the movable rod 11 is moved upward by the clockwise rotation of the first lever 12.
Accordingly, the clockwise rotation of the first lever 12 is urged by the spring 22. Therefore, if left as it is, the movable rod portion 11 will move upward due to the urging force of the spring 22. In order to prevent such movement, a projection 12a is formed at the tip of the first lever 12,
As shown in FIG. 18, the projection 12a is
And the first lever 12 and the link member 13
To prevent further rotation. Therefore, as shown in FIG. 18, in a state where the second connecting portion 17 is located inside the straight line A connecting the first connecting portion 16 and the third connecting portion 18, the first lever 12 and the link member 13 is locked. In this state, the first lever 1
Since the urging force of the spring 22 acts on the rotation in the opposite direction of 2, that is, the counterclockwise rotation, it does not rotate counterclockwise unless some external force is applied.

FIG. 19 shows a state where the other end of the second lever 15 is pushed down. When the second lever 15 is pushed down, the projection 15a of the second lever 15
The second connecting portion 17 connecting the lever 12 and the link member 13 is pressed. Thereby, the second connecting portion 17 moves outside the straight line A connecting the first connecting portion 16 and the third connecting portion 18. As a result, the upward movement of the movable rod portion 11 causes the first lever 12 to rotate counterclockwise, and the urging force of the spring 22 causes the movable rod portion 11 to move upward, and the first lever 12 Turn clockwise, the other end is lifted. First lever 12
Rotates counterclockwise, comes into contact with the second lever 15, and returns to the original state shown in FIG.

As described above, when lifting the wheels,
As shown in FIG. 18, the other end of the first lever 12 is pushed down, thereby moving the movable rod portion 11 downward and lifting the wheel from the ground contact surface. When the wheels are grounded after replacing the wheels or the like, the other end of the second lever 15 is pushed down, and the second connecting portion 17 is pressed by the protruding portion 15a as shown in FIG. When you release the state,
The other end of the first lever 12 is lifted upward by the urging force of the spring 22, and returns to the original state as shown in FIG. 17, so that the wheels can be grounded.

FIG. 20 is a partially cutaway sectional view showing the axle portion 5 of the rear wheel. As shown in FIG. 20, the axle portion 5 is provided with a mounting portion 5a for supporting the rear wheel.
b and a central axis 5c passing therethrough. In the central portion where the diameter of the central shaft 5c is small, the cylindrical portion 5
A gap is formed between the gap b. As shown in FIG. 20, the center shaft 5c is urged leftward in the figure by the spring coil 7. When the end 5e of the central shaft 5c is pressed rightward in the drawing against the biasing force of the spring coil 7, the ball 8 can be pressed inward along the inclined surface 5d of the central shaft 5c. Therefore, the axle 5 can be pulled out from the hole of the pipe while the end 5e of the center shaft 5c is pressed. In this manner, the wheels can be removed while the wheels are lifted using the stand. When attaching the wheel to the pipe, the wheel can be inserted and attached to the hole in the pipe while pressing the end 5e of the central shaft 5c in the same manner.

FIG. 21 is a side view showing a stand according to another embodiment of the present invention. As shown in FIG. 21, in the stand section 10 of this embodiment, the movable rod section 11
An L-shaped arm is used, and an auxiliary wheel 30 is attached to the tip of the L-shaped arm. In such a case, by pushing down the other end of the first lever 12, the movable rod portion 11 is moved downward as shown by the imaginary line in FIG. 21, and the auxiliary wheel 30 attached thereto is grounded. The rear wheel 3 can be lifted.

Such an auxiliary wheel 30 can function as a fall-prevention wheel when the entire wheelchair is tilted rearward in a state where it is positioned above indicated by a solid line in FIG.

When the auxiliary wheel 30 is positioned below, the auxiliary wheel 30 is grounded, so that the wheelchair can be moved by using the auxiliary wheel 30 as an indoor wheel.

[0036]

According to the wheelchair of the present invention, a stand for lifting the wheel is provided, and the wheel can be easily lifted by pushing down the first lever of the stand. Accordingly, in this state, it is possible to replace, for example, an outdoor wheel with an indoor wheel or from an indoor wheel with an outdoor wheel. After such replacement work is completed, the movable rod portion is moved upward by depressing the second lever,
The wheels can be grounded.

Therefore, according to the present invention, the wheels can be easily lifted, and the replacement work of the wheels and the like become easy.
In addition, the wheelchair can be replaced without the disabled person getting off the wheelchair.

[Brief description of the drawings]

FIG. 1 is a side view showing a wheelchair according to an embodiment of the present invention.

FIG. 2 is a rear view showing the wheelchair according to the embodiment of the present invention;

FIG. 3 is a side view showing a stand portion used in the embodiment shown in FIG. 1;

FIG. 4 is a plan view showing a stand used in the embodiment shown in FIG. 1;

FIG. 5 is a side view showing a second lever used in the embodiment shown in FIG. 1;

FIG. 6 is a plan view showing a second lever used in the embodiment shown in FIG. 1;

FIG. 7 is a side view showing a base member used in the embodiment shown in FIG. 1;

FIG. 8 is a plan view showing a base member used in the embodiment shown in FIG.

FIG. 9 is a front view showing a base member used in the embodiment shown in FIG. 1;

FIG. 10 is a side view showing a link member used in the embodiment shown in FIG. 1;

FIG. 11 is a plan view showing a link member used in the embodiment shown in FIG. 1;

FIG. 12 is a front view showing a link member used in the embodiment shown in FIG. 1;

FIG. 13 is a side view showing a first lever used in the embodiment shown in FIG. 1;

FIG. 14 is a plan view showing a first lever used in the embodiment shown in FIG. 1;

FIG. 15 is a partially cutaway side view showing a movable rod used in the embodiment shown in FIG. 1;

FIG. 16 is a plan view showing a movable rod used in the embodiment shown in FIG. 1;

FIG. 17 is a side view showing a stand portion used in the embodiment shown in FIG. 1, showing a state before moving a movable rod portion downward.

FIG. 18 is a side view showing a stand portion used in the embodiment shown in FIG. 1, showing a state in which a first lever is pushed down to move a movable rod portion downward.

FIG. 19 is a side view showing a stand used in the embodiment shown in FIG. 1, showing a state in which a second lever is pushed down to move a movable rod part upward.

FIG. 20 is a partially cutaway plan view showing an axle portion that supports a rear wheel used in the embodiment shown in FIG. 1;

FIG. 21 is a side view showing a stand according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Wheelchair 2 ... Front wheel 3 ... Rear wheel 4 ... Pipe supporting a rear wheel 5 ... Axle part 10 ... Stand part 11 ... Movable rod part 12 ... First lever 13 ... Link member 14 ... Base member 15 ... Second Lever 16: first connecting portion 17: second connecting portion 18: third connecting portion 19: fourth connecting portion

Claims (1)

(57) [Scope of request for utility model registration] 1. A wheelchair having a stand portion for lifting a wheel, wherein the stand portion includes a movable rod portion guided downward to move the wheel and a movable rod portion for moving the movable rod portion. A first lever rotatably attached to the movable rod portion at a first connection portion separated from the end by a predetermined distance, and one end rotatable at a second connection portion near one end of the first lever A base member attached to the wheelchair main body, the base member rotatably supporting the link member at a third connection portion near the other end of the link member, and the movable rod portion is pushed upward. Urging means for urging the movable rod portion downward by pressing down the other end of the first lever and rotating the first lever around the first connecting portion. Moving and linking the link member cooperatively about the third connecting portion, the second connecting portion crosses a straight line connecting the first connecting portion and the third connecting portion. A stopper for preventing cooperative rotation between the first lever and the link member in a state positioned inside the lever, a lever provided above the first lever,
A connection between the first lever and the link member which is rotatably supported by the base member at a fourth connection portion near one end thereof and is prevented from rotating by the stopper when the other end is pressed down. A wheelchair, comprising: a second lever having a protrusion that acts to push a second connection portion, which is a portion, outside a straight line connecting the first connection portion and the third connection portion.