JPH09276338A - Brake device for wheelchair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brake device which substantially narrows the body width when alternative wheels are used. SOLUTION: A brake device 1 is composed of a base plate, an operation lever 50, a brake shoe 40, and a joint bar. The base plate is attached to a frame 102 of a wheel chair 100 so that the base plate does not project over a braked wheel 103. The operation lever 50 is attached to the base plate so that the operation lever can swing freely. The brake shoe 40 is attached to the base plate so that the brake shoe can swing freely. and applies the brake to the braked wheel 103. One end of the joint bar is rotatably attached to the operation lever 50 and the other end of it is rotatably attached to the brake shoe 40. When not braked, the operation lever 50, brake shoe 40, and the joint bar do not project over the braked wheel 103, and when braked, the brake shoe 40 is locked and presses against the circumference of the braked wheel 103 from the direction approximately perpendicular to its normal line.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheelchair brake device for braking the outer peripheral surface of a wheel of a wheelchair.

[0002]

2. Description of the Related Art The wheel width of a wheelchair is rarely a problem when used in a place where the crowd is small, but when used in a crowded place such as an aisle in a train or in a narrow aisle. It is desirable that the vehicle width is as narrow as possible.

Therefore, recently, in addition to the left and right main wheels from the past, left and right wheels having a narrower gap than the main wheels are provided as alternative wheels, and the main wheels are detached to move the wheelchair by the alternative wheels. Wheelchairs that can be made narrower are being developed.

[0004]

However, the conventional wheelchair braking device is located in front of the main wheels as described in Japanese Patent Publication No. 1-55020 and Japanese Utility Model Publication No. 3-45705. Since it is arranged on the frame of the wheelchair, there is a problem that the brake device protrudes to the outside of the alternative wheel and the vehicle width does not become substantially narrow when the main wheel is removed.

An object of the present invention is to solve the above problems and to provide a wheelchair brake device which can substantially reduce the width of a vehicle when an alternative wheel is used.

[0006]

According to a first aspect of the present invention, there is provided a wheelchair brake device in which a base plate is mounted on a frame of a wheelchair so as not to project to the outside of a wheel to be braked, and an operation swingably provided on the base plate. A lever, a brake shoe that is swingably provided on the base plate and applies braking to the braked wheel, one end is rotatably provided on the operation lever, and the other end is rotatable on the brake shoe. Equipped with a joint bar provided in
The operation lever, the brake shoe, and the joint bar are both in a state of not projecting outside of the braked wheel during non-braking, and the brake shoe is in a locked state during braking, and an outer peripheral surface of the braked wheel. Is pressed substantially orthogonally from its normal direction.

A wheelchair brake device according to a second aspect of the present invention is characterized in that, in the first aspect, the base plate is located below a seat portion, and the brake shoe applies braking from a front side of the braked wheel.

According to a third aspect of the present invention, there is provided the wheelchair brake device according to the first or second aspect, wherein the brake shoe swings in the same direction as the swinging direction of the operating lever.

A wheelchair brake device according to a fourth aspect of the present invention is characterized in that, in any one of the first to third aspects, the operation lever is located below the brake shoe.

[0010]

According to the wheelchair braking device of the first aspect of the present invention, the base plate is mounted on the frame of the wheelchair so that it does not project to the outside of the braked wheel, and when not braking, the operating lever, the brake shoe and the joint bar. Both of them are in a state in which they do not project to the outside of the braked wheels, so that when the left and right alternative wheels, which are closer to each other than the main wheels, are used, the brake device will make the vehicle width substantially wider. This does not happen, and therefore the vehicle width can be reduced.

According to the wheelchair braking device of the second aspect, since the base plate is located below the seat portion and the brake shoe is adapted to apply braking from the front side of the braked wheel, the braking device interferes with getting on and off. It does not cause problems such as.

According to the wheelchair brake device of the third aspect, since the brake shoe swings in the same direction as the swing direction of the operating lever, the operation of the operating lever becomes easy.

According to the wheelchair brake device of the fourth aspect, since the operating lever is located below the brake shoe, the operating lever can be easily operated.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view of a wheelchair equipped with a wheelchair brake device according to the first and second embodiments, FIG. 2 is a perspective view of a base plate of the brake device according to the first embodiment, and FIG. 4 is an exploded perspective view of the main part of the brake device.
FIG. 5 is a perspective view of a main part of the brake device when not braking, FIG.
FIG. 6 shows a rear view of the same braking device when not braking and a plan view taken along line BB, and FIG. 6 shows a rear view of the same braking device when braking and a plan view taken along line BB, respectively.

1 to 6, the brake device 1 is
It is fixed to the side frame 102 so as to be located below the right side of the seat portion 101 of the wheelchair 100, and brakes the front outer peripheral surface of the right main wheel 103 as a braked wheel (FIG. 1). .

The brake device 1 is provided with a base plate 10 which is mounted on a mounting portion 102a of a side frame 102 of a wheelchair 100 with a bolt 104 and a nut (not shown) so as not to project outside the braked wheel 103.

The base plate 10 has an upper plate portion 11, an intermediate plate portion 12 and a lower plate portion 13.

The upper plate portion 11 and the middle plate portion 12 are provided with through holes 11a, 12a coaxial with each other in the vertical direction. A bolt 22 covered with a washer 21 is inserted into the through hole 12a of the intermediate plate portion 12 from below, a bush 23 is passed through the bolt 22, a brake shoe 40 is passed through the through hole 41, and a bush 24 is further passed. Then, by further inserting the bolt 22 into the through hole 11a of the upper plate portion 11 and tightening it with the nut 26 through the washer 25,
Brake shoes 40 are attached to the base plate 10 by bolts 22.
Is provided so as to be swingable in the horizontal direction.

Further, the middle plate portion 12 and the lower plate portion 13 are provided with through holes 12b and 13a which are coaxial with each other in the vertical direction. A bolt 28 covered with a washer 27 is inserted into the through hole 13a of the lower plate portion 13 from below.
8 through the bush 29, and further through the through hole 51a of the one leg 51 that is bifurcated, through the operating lever 50, through the bush 30, and further through the bolt 28 into the through hole 12b of the intermediate plate portion 12. By inserting and tightening with a nut 32 via a washer 31, an operation lever 50 is provided on the base plate 10 so as to be swingable in the horizontal direction around the bolt 28 as an axis.

A through hole 52a is also formed in the other leg 52 of the operating lever 50 which is bifurcated. The pin 33 is inserted from below into the through hole 52a.
The bush 34 through the through hole 61 and the through hole 61 at one end.
The joint bar 60 is inserted through the joint bar 60, and the tip portion of the pin 33 is crimped to fix the pin 33 and the joint bar 60 to each other, whereby the joint bar 60 is rotatably provided on the operation lever 50 with the pin 33 as an axis. ing.

Another through hole 42 is formed in the brake shoe 40 at a position closer to the center than the through hole 41.
In addition, the through hole 62 is also formed at the other end of the joint bar 60.
Are formed. Then, the pin 35 is inserted into the through hole 42 of the brake shoe 40 from above, the bush 36 is passed through the pin 35, the joint bar 60 is passed through the through hole 62, and the tip portion of the pin 35 is crimped. By fixing the pin 35 and the joint bar 60 to each other, the joint bar 60 is rotatably provided on the brake shoe 40 about the pin 35.

Further, the joint bar 60 is provided with a stopper portion 63 which is bent upward.

Next, the operation of the braking device 1 constructed as described above will be described.

First, during non-braking, the braking device 1
As shown in FIGS. 4 and 5, the operation lever 50 is in contact with the head portion 22a of the bolt 22 and its rotation in the direction of arrow A in FIG. 5 is restricted, that is, almost the same as the side frame 102 of the seat portion 101. It is in a parallel state. The brake shoe 40 is substantially parallel to the operation lever 50.
Further, the joint bar 60 is located farther from the operation lever 50 and the brake shoe 40. Therefore,
At the time of non-braking, the operation lever 50, the brake shoe 40, and the joint bar 60 are all located inside the side frame 102 and do not project outside the braked wheel 103. As described above, the brake device 1 is in the housed state during non-braking. For this reason, when the left and right main wheels are removed and alternative wheels with a narrow gap are used, the brake device 1 does not substantially widen the vehicle width,
The width of the car can be reduced.

Next, insert the right hand under the seat 101,
When the operation lever 50 of the brake device 1 in the stored state is rotated rightward (direction of arrow B in FIGS. 4 and 5), the operation lever 50 rotates about the bolt 28 as a shaft, and the operation lever 50 is rotated. As the brake shoe 40 moves through the joint bar 60, the brake shoe 40 is rotated about the bolt 22 as an arrow B.
Rotate in the direction. At this time, the brake shoe 40 operates the operating lever based on the ratio of the distance between the bolt 28 and the pin 33, the distance between the pin 33 and the pin 35, and the distance between the bolt 22 and the pin 35. Rotating at an angular velocity greater than 50, the brake shoe 40 rotates about 90 ° as shown in the chain double-dashed line in FIG. 4 and in FIG. 6 to move the outer peripheral surface of the braked wheel 103 from its normal direction. The operation lever 50 is pressed substantially orthogonally, the operation lever 50 is rotated by an angle smaller than 90 °, and the brake shoe 40 brakes the braked wheel 103. During this braking, the bolt 28, the pin 35, and the pin 33 are positioned on a substantially straight line, and the brake shoe 40 is positioned at the dead point. For this reason, the brake shoes 40 are
The brake shoe 40 does not rotate in the direction of arrow A in FIG. Further, at the time of this braking, since the stopper portion 63 of the joint bar 60 contacts the brake shoe 40, the operation lever 50 is restricted from rotating in the arrow B direction.
The brake shoe 40 is not released from the dead center unless the operation of rotating 0 in the direction of the arrow A to release the brake is performed. Therefore, the brake shoe 40 is in the locked state and the braking is secured.

Thereafter, when releasing the braking, the operation lever 50 is rotated in the direction of arrow A. Operating lever 50
When is rotated in the direction of arrow A, the brake shoe 40 is easily disengaged from the dead point, the locked state is released, and the operation lever 5
Following the rotation of 0, it rotates in the direction of arrow A. Therefore, the braking is released. Then, the operation lever 50 and the brake shoe 40 return to the original stored state.

7 to 10 show a brake device according to a second embodiment, FIG. 7 is a perspective view of a base plate of the brake device, FIG. 8 is an exploded perspective view of a main part of the brake device, and FIG. FIG. 10 shows a rear view of the same braking device when not braking and a plan view taken along the line BB, and FIG. 10 shows a rear view of the same braking device when braking and a plan view taken along the line BB, respectively.

7-10, the brake device 1 is shown.
The wheelchair 100 is similar to the brake device 1 of the first embodiment.
It is fixed to the side frame 102 so as to be located below the right side portion of the seat portion 101, and brakes the front outer peripheral surface of the right main wheel 103 as a braked wheel (FIG. 1).

The brake device 1 is provided with a base plate 10 which is mounted on the mounting portion 102a of the side frame 102 of the wheelchair 100 with bolts and nuts (not shown) so as not to project outside the braked wheels 103.

The base plate 10 has a horizontal top plate portion 14
And a vertical mounting plate portion 15 extending upward from the top plate portion 14 and attached to the mounting portion 102a of the side frame 102.
And a vertical stopper plate portion 1 extending downward from the top plate portion 14
6 and a bottom plate portion 17.

The top plate portion 14 and the bottom plate portion 17 are provided with through holes 14a, 17a coaxial with each other in the vertical direction. The bolt 7 is inserted into the through hole 14a of the top plate 14 from above.
1 is inserted, the washer 72 is passed through this bolt 71,
Further, the brake shoe 40 is passed through the through hole 41,
Further, by inserting the bolt 71 into the through hole 17a of the bottom plate portion 17 and tightening it with the nut 74 via the washer 73, the brake shoe 40 is provided on the base plate 10 so as to be horizontally swingable around the bolt 71. .

Further, the top plate portion 14 and the bottom plate portion 17 are provided with through holes 14b and 17b which are coaxial with each other in the vertical direction. A bolt 75 is inserted into the through hole 14b of the top plate portion 14 from above, a washer 76 is passed through the bolt 75, and a dogleg-shaped operation lever 50 is passed through the through hole 51a. By inserting 75 into the through hole 17b of the bottom plate portion 17 and tightening it with a nut 78 via a washer 77, the operation lever 50 is provided on the base plate 10 so as to be horizontally swingable around the bolt 75.

Another through hole 52a is also formed in the operating lever 50. The pin 7 is inserted into the through hole 52a from below.
9 is inserted, the bush 80 is passed through the pin 79, and the joint bar 6 is inserted through the through hole 61 at one end.
0, and then crimp the tip of pin 79 to pin 79
The joint bar 60 is rotatably provided on the operation lever 50 by fixing the pin and the joint bar 60 to each other.

Another through hole 42 is formed in the brake shoe 40 at a position closer to the center than the through hole 41.
In addition, the through hole 62 is also formed at the other end of the joint bar 60.
Are formed. Then, the pin 81 is inserted into the through hole 62 of the joint bar 60 from below, the bush 82 is passed through the pin 81, the brake shoe 40 is passed through the through hole 42, and the tip portion of the pin 81 is crimped. By fixing the pin 81 and the brake shoe 40, a joint bar 60 is provided on the brake shoe 40 so as to be rotatable about the pin 81.

Next, the operation of the brake device 1 configured as described above will be described.

First, when not braking, the braking device 1
As shown in FIG. 9, the brake shoe 40 is in contact with the stopper plate portion 16 of the base plate 10 and its rotation in the direction of arrow A in FIG. 9 is restricted, that is, substantially parallel to the side frame 102 of the seat portion 101. Is in a state. Further, the operating portion 53 of the operating lever 50 is in a state substantially parallel to the brake shoe 40. The joint bar 60 is substantially parallel to the operating portion 53 of the operating lever 50 and the brake shoe 40. Therefore, at the time of non-braking, the operation lever 50, the brake shoe 40, and the joint bar 60 are all located inside the side frame 102 and do not project outside the braked wheel 103. As described above, the brake device 1 is in the housed state during non-braking. For this reason, when the left and right main wheels are removed and alternative wheels with a narrow gap are used, the brake device 1 does not substantially widen the vehicle width, and the vehicle width can be narrowed.

Next, insert the right hand under the seat 101,
When the operation lever 50 of the brake device 1 in the housed state is rotated rightward (the direction of arrow B in FIG. 9), the operation lever 50 rotates about the bolt 75 as an axis. Through the joint bar 60, the brake shoe 40 rotates about the bolt 71 in the arrow B direction. At this time, the distance between the bolt 75 and the pin 79,
Based on the ratio of the distance between the pin 79 and the pin 81 and the distance between the bolt 71 and the pin 81, the brake shoe 4
0 rotates at an angular velocity larger than the angular velocity of the operating lever 50, and as shown in FIG.
In a state in which the operation lever 50 is rotated to press the outer peripheral surface of the braked wheel 103 substantially perpendicularly from the normal direction, the operation lever 50 is 90 °.
The brake shoe 40 brakes the braked wheel 103 by rotating the brake shoe 40 by a smaller angle. At the time of this braking, the bolt 75, the pin 79, and the pin 81 are positioned on a substantially straight line, and the brake shoe 40 is positioned at the dead point. Therefore, the brake shoe 4
Even if 0 receives stress from the braked wheel 103, the brake shoe 40 does not rotate in the direction of arrow A in FIG. Further, at the time of this braking, since the concave portion 64 of the joint bar 60 comes into contact with the tubular portion 43 of the brake shoe 40, the operation lever 50 is restricted from rotating in the arrow B direction. The brake shoe 40 is not released from the dead center unless the brake shoe 40 is rotated in the direction of arrow A to release the brake. Therefore, the brake shoe 40 is in the locked state and the braking is ensured.

Thereafter, when releasing the braking, the operation lever 50 is rotated in the direction of arrow A. Operating lever 50
When is rotated in the direction of arrow A, the brake shoe 40 is easily disengaged from the dead point, the locked state is released, and the operation lever 5
Following the rotation of 0, it rotates in the direction of arrow A. Therefore, the braking is released. Then, the operation lever 50 and the brake shoe 40 return to the original stored state.

As described above, according to the wheelchair brake device 1 of each embodiment, the base plate 10 is mounted on the frame 102 of the wheelchair 100 so as not to project to the outside of the braked wheel 103, and when not braking, Operating lever 50, brake shoe 40 and joint bar 6
Since 0 is in a state where both do not protrude outward from the braked wheel 103, the brake device 1 should substantially widen the vehicle width when the left and right alternative wheels that are closer to each other than the main wheel are used. Therefore, the vehicle width can be reduced. Further, the base plate 10 has a seat portion 101.
The brake shoe 40 is located on the lower side of the
Since braking is applied from the front side of No. 3, there is no problem that the braking device 1 becomes an obstacle when getting on and off. Further, since the brake shoe 40 swings in the same direction as the swing direction of the operation lever 50, the operation of the operation lever 50 becomes easy. Further, since the operating lever 50 is located below the brake shoe 40, the operating lever 50 can be easily operated.

[Brief description of drawings]

FIG. 1 is a side view of a wheelchair equipped with a wheelchair brake device according to first and second embodiments.

FIG. 2 is a perspective view of a base plate of the brake device according to the first embodiment.

FIG. 3 is an exploded perspective view of a main part of the brake device.

FIG. 4 is a perspective view of a main part of the braking device when not braking.

FIG. 5 is a rear view and B- of the brake device when not braking.
Plan view by B line

FIG. 6 is a rear view and BB of the braking device during braking.
Plan view with lines

FIG. 7 is a perspective view of a base plate of a brake device according to a second embodiment.

FIG. 8 is an exploded perspective view of a main part of the brake device.

FIG. 9 is a rear view and B- of the braking device when not braking.
Plan view by B line

FIG. 10 is a rear view and B- of the braking device during braking.
Plan view by B line

[Explanation of symbols]

 1 Brake Device 10 Base Plate 40 Brake Shoe 50 Operating Lever 60 Joint Bar 100 Wheelchair 101 Seat 102 Side Frame (Frame) 103 Wheel to be Braked

Claims (4)

[Claims] 1. A base plate mounted on a frame of a wheelchair so as not to project to the outside of a braked wheel, an operation lever provided on the base plate so as to be swingable, and a swingably provided on the base plate, A brake bar for braking the braked wheel; and a joint bar having one end rotatably provided on the operation lever and the other end rotatably provided on the brake shoe, the operation lever, The brake shoe and the joint bar are both in a state where they do not project outward from the braked wheel when not braking, and the brake shoe is in a locked state during braking, and the outer peripheral surface of the braked wheel is normal to the normal line. A brake device for a wheelchair, which is characterized by pressing substantially orthogonally from the direction. 2. The wheelchair brake device according to claim 1, wherein the base plate is located below the seat portion, and the brake shoe applies braking from the front side of the braked wheel. 3. The wheelchair brake device according to claim 1, wherein the brake shoe swings in the same direction as the swing direction of the operation lever. 4. The wheelchair brake device according to claim 1, wherein the operation lever is located below the brake shoe.