JPH09313541A - Brake for wheelchair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve certainty of sudden braking by constituting the structure in which brake lever pushing to either direction of forward or backward causes pushing of rubber pads to main wheels and the consequent brake work. SOLUTION: In this brake 100, a swing table 120 is set with an axis 114. Inclined faces 120A and 120B of the swing table 114 are supported by a crossed pair of support bars 110 and 113 respectively in a balanced condition together with constant pulling force of a spring 130 to A direction, that a pair of pad arms 104 are kept off the main wheel tires 2. Upon pushing down a lever 101 backward or forward, the inclined face 120A to 120B pushes down the support bar 110 or 113. Such movement of either support bars 110 or 113 cause swing of the pad arm 104 to P direction and pushing of a rubber pad 102 against the main wheel 2 as the braking force. Such a constitution without gear mechanism enable sure brake work regardless of pushing directions of the lever.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheelchair used by a person with a disability or the like, and more particularly to a braking device for stopping or decelerating while running.

[0002]

2. Description of the Related Art Conventionally, wheelchairs have been widely used for people with disabilities to move by themselves and to be moved by being pushed by a caregiver. When a person with a disability moves in a wheelchair by himself, if an obstacle or a moving object (person, car, etc.) suddenly appears in front of him, the wheelchair is used to prevent a collision. Need to stop. In preparation for such a case, a braking device is attached to a position on the side of the wheelchair that can be reached by the hand.

[0003]

By the way, the conventional braking device has a complicated gear mechanism and has a complicated structure because the operation direction is limited to one direction. There was a problem that the braking operation could not be done in time because the operation was mistaken. In addition, there is also one in which a guide groove is provided on the lever of the braking device and the lever is operated along the groove, but it becomes engrossed in a dull moment, and reliable braking can be obtained in an emergency. There wasn't. The present invention has been made under the circumstances as described above, and an object of the present invention is to provide a wheelchair braking device that has a simple structure without a gear mechanism and that can be reliably operated even during a slam. .

[0004]

SUMMARY OF THE INVENTION The present invention relates to a braking device for a wheelchair, and the above object of the present invention is to provide a rubber pad on the tire surface of a large wheel provided on at least one side of the wheelchair and operated by a lever. This is achieved by braking the lever so that the lever can move to the front and rear and intermediate positions, and the rubber pad is pressed against the tire regardless of whether the lever is moved to the front or rear position. . Another object of the present invention is to provide a wheelchair braking device in which a rubber pad is pressed against a tire surface of a large wheel of a wheelchair by a lever operation to brake the wheelchair.
A main body panel for attaching one surface side to the arm, and a braking arm in which one end of the other side of the main body panel is pivotally attached and the rubber pad is attached to the tip end portion facing the pivot point. ,
A first oscillating piece whose one end is axially attached to an intermediate position of the braking arm, and a second oscillating piece whose one end is axially attached to the lower end of the other end of the main body board; The other end of the second rocking piece is attached to the shaft, and the lever is vertically installed on the upper surface of the second rocking piece. A rocking base having a surface and pivotally mounted on the pivotal mounting portion, a first pin protruding from a position lower than the intermediate position of the braking arm, and a lower end on the other end side of the main body board. This is achieved by providing a spring suspended between the second pins protruding from the base and a cover attached to the main body board so as to cover the respective members.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the overall structure of a wheelchair 1 equipped with a braking device 100 of the present invention on both sides.
Large wheels 2 around which solid tires or pneumatic tires are provided are provided together with a hand rim 3 on both sides. The wheelchair 1 is entirely formed of a tubular aluminum frame 10 in a foldable manner, has a handle 11 for pushing and guiding by a caregiver in the rear part, and a rubber part in the handle part for easy grip. A handle cover 20 is attached. Further, a backrest 12 made of leather or synthetic resin is stretched on the rear portion of the frame 10, and a seat 13 made of leather or synthetic resin is stretched on the sitting portion, and the forward leaning portion is also stretched. A leg rest 14 made of leather or synthetic resin is stretched. Further, an armrest 15 is attached to the upper portion of the frame 10 for a rider to attach his elbows and arms.

A caster is provided on the front hanging portion of the frame 10.
4 is attached so that the traveling direction can be freely changed. A foldable footrest 30 is attached to the tip of the forwardly inclined portion of the frame 10. Then, on the frames 10 on both sides of the sheet 13,
A braking device 100 as shown in detail in FIG. 2 is attached, and by operating the lever 101 in the forward direction (F) or the backward direction (R) of the traveling direction, the rubber pad 102 moves in the P direction and the kamaboko The shaped rubber pad 102 is pressed against the tire surface of the large wheel 2 to brake.

The internal structure of the braking device 100 is as shown in FIG. 3, and there is a substantially elliptical main body board 103 for attaching the back side to the frame 10 of the wheelchair 1, and the left side of the main body board 103 is long. A pad arm 104 having a shape is arranged, and is oscillated around a shaft 105 above the pad arm 104 as a fulcrum, and a rubber pad 102 is arranged at the tip of the pad arm 104. Pad arm 1
A shaft 111 is arranged in the middle of 04.
The swing piece 110 is axially mounted on the main body board 103, and a column 112 is projected from the lower end of the right side of the main body board 103. The swing piece 113 is axially mounted on the column 112. Oscillating pieces 110 and 11
The other ends of the rocking rods 3 are hooked together and coupled by a shaft 114, and the inclined surfaces 120A and 120B are brought into close contact with the upper surfaces of the rocking pieces 110 and 113 that are hooked, so that the rocking base 120 of the rocking base 120 is in contact. The lower part is attached to the shaft 114,
A lever 101 is vertically provided on the top of the rocking table 120. Further, a pin 131 is provided on the lower portion of the shaft 111 of the pad arm 104, and a pin 132 is also provided on the lower portion of the main body board 103.
And a spring 1 between the pins 131 and 132.
30 are suspended. The pad arm 104 is always pulled in the direction A in the figure by the elastic action of the spring 130. However, since the rocking base 120 is pivotally attached to the shaft 114, and the inclined surfaces 120A and 120B are in close contact with the upper surfaces of the rocking pieces 110 and 113 which are hung on the rocking base 120, FIG.
Maintain a balanced state. In this state, the rubber pad 102 is separated from the tire of the large wheel 2. FIG. 2 shows a state in which the cover 140 is attached to the body panel 103 of FIG.

In such a structure, when a person on the wheelchair 1 operates the braking device 100 to stop,
By operating the lever 101 in either the forward or backward R or F direction, the pad arm 104 swings in the P direction, and the rubber pad 102 is pressed by the tire of the large wheel 2 and braked. That is, as shown in FIG. 4, when the lever 101 is operated and moved in the F direction, for example, the rocking base 120 is moved.
The inclined surface 120A presses the upper surface of the swing piece 110, so that the swing piece 110 swings in the B direction with the shaft 111 as the fulcrum, and the swing piece 113 swings in the C direction with the shaft 112 as the fulcrum. . At the same time, the pad arm 104 swings in the P direction against the tensile force of the spring 130 with the shaft 105 as a fulcrum.

Then, when the lever 101 is further pushed in the F direction, finally, as shown in FIG.
13 swings to a substantially horizontal position and stops in a substantially V-shape, and the pad arm 104 also moves fully so that the rubber pad 102 is pressed against the tire of the large wheel 2. Lever 10 in this state
Even when 1 is released from the hand, since the swinging pieces 110 and 113 are substantially V-shaped, the braking state is maintained as it is. Then, when the lever 101 is moved in the R direction, the pad arm 10 is pulled by the pulling force of the spring 130.
4. The swinging pieces 110 and 113 are restored to the initial state shown in FIG.

On the other hand, the same applies when the lever 101 is operated in the R direction from the state shown in FIG. 3, and the braking state shown in FIG. 6 is obtained. That is, the inclined surface 120B of the rocking base 120 causes the rocking piece 1 to
Since the upper surface of 13 is pressed, the swing piece 113 swings in the C direction with the shaft 112 as the fulcrum, and the swing piece 110 swings in the B direction with the shaft 111 as the fulcrum. At the same time,
The pad arm 104 swings in the P direction against the tensile force of the spring 130 with the shaft 105 as a fulcrum.

[0011]

According to the braking device of the present invention, the mechanism is simple, and the brake can be applied by operating the lever in any of the front and rear directions. It also has the advantage that it can be operated reliably.

[Brief description of drawings]

FIG. 1 is an external view showing an embodiment of the present invention.

FIG. 2 is an external view showing an example of a braking device of the present invention.

FIG. 3 is a mechanism diagram showing an operation example of the braking device of the present invention.

FIG. 4 is a mechanism diagram showing an operation example of the braking device of the present invention.

FIG. 5 is a mechanism diagram showing an operation example of the braking device of the present invention.

FIG. 6 is a mechanism diagram showing an operation example of the braking device of the present invention.

[Explanation of symbols]

 1 Wheelchair 2 Large Wheel 3 Hand Rim 4 Caster 10 Frame 20 Handle Cover 30 Footrest 100 Braking Device

Claims (4)

[Claims] 1. A wheelchair is provided on at least one side, and a lever is operated to press a rubber pad against the tire surface of a large wheel to brake, and the lever can be moved to the front and rear and intermediate positions. The braking device for a wheelchair, wherein the rubber pad is pressed against the tire regardless of whether the rubber pad is moved to the front or rear position. 2. The wheelchair braking device according to claim 1, wherein the wheelchair is a foldable type. 3. A wheelchair braking device in which a rubber pad is pressed against a tire surface of a large wheel of a wheelchair by a lever operation to brake, and a main body panel to which one side is attached to a frame of the wheelchair. A braking arm in which one end of the other side of the main body panel on the other surface side is axially attached, and the rubber pad is attached to a tip end opposite to the axial attachment point; and an intermediate position of the braking arm. A first oscillating piece whose one end is axially attached to the main body board, a second oscillating piece whose one end is axially attached to the lower portion of the other end of the main body board, and the first and second oscillating pieces. The other end is axially attached, and the lever is vertically provided on the upper surface, and the inclined end surfaces of the first and second swinging pieces have inclined surfaces so that both lower surfaces are in close contact with each other. A rocking base pivotally attached to the portion, a first pin projecting at a position lower than the intermediate position of the braking arm, and the It is characterized in that it comprises a spring suspended between second pins projecting from the lower part of the other end of the main body board, and a cover that is attached to the main body board so as to cover each member. Wheelchair braking system. 4. The wheelchair braking device according to claim 3, wherein the wheelchair is foldable.