JP3076628U - Dolly type wheelchair - Google Patents

Abstract

(57) [Summary] [Purpose] Reduce the turning radius of the wheelchair so that the handicapped can operate on their own as if walking, and distribute the load on each wheel supporting the chair so that they can go over steps with a small force. It is an object to provide a wheelchair having a structure. [Structure] A truck constructed by mounting drive wheels in front of a frame of a truck and casters in the rear is mounted on a shaft provided in the middle of the frame of the truck, behind a frame of a chair on which the casters are mounted in front. It is attached. A spindle for mounting the cart on a chair is rotatable and provided with a stopper so as to stop at a fixed angle.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention mainly relates to a wheelchair that can be used by a disabled person using a self-acting wheelchair as if walking.

[0002]

[Prior art]

 In conventional wheelchairs, the driving wheel is behind the driver, so the turning radius around the body is large and the maneuverability is poor, and the load on the front wheel is large, so a large force was required even over small steps. .

[0003]

[Problems to be solved by the invention]

 To provide a wheelchair with a structure in which the wheelchair's radius of rotation is reduced so that the disabled person can control the vehicle as if walking, and the load on each wheel supporting the chair is distributed to allow the disabled person to move over a step with a small force. Aim.

[0004]

[Means for solving the problem]

 In order to solve the above-mentioned object, a caster is mounted in front of the chair, and a bogie with driving wheels and casters mounted in front and back is used instead of the wheels in the back of the chair. The load applied to the back of the chair is distributed by the drive wheels in front of the bogie and the rear casters, and the mounting position of the chair on the support shaft is brought closer to the front casters below the center of gravity of the pilot. The wheelchair shall be designed to reduce the load applied and to bring the driving wheels closer to the center of the body and to have a structure with a small turning radius.

[0005] The support shaft for mounting the cart on the chair is provided with a stopper so that it can rotate freely and stop at a fixed angular position so that the chair does not fall backward.

[Action]

 When traveling normally, most of the load is applied to the rear bogie, and the load due to the slight unevenness of the road surface can be distributed to the front casters, the front drive wheels of the bogie, and the rear casters, respectively. The front and rear casters or drive wheels do not float. When crossing a step, the reaction force that pushes the drive wheels forward can lift the casters in front of the chair by tilting the chair backward, so that the chair can go over the step and the drive wheels in front of the bogie can be moved. In addition, since the load on the truck is shared by the casters on the rear and in proportion to the position of the support shaft, the step can be moved relatively easily. In addition, since the driving wheels are provided near the center of the pilot's body, the turning radius is small and the operation can be performed at will.

[0006]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. Fig. 1 is an anatomical view of the truck type wheelchair of the present invention viewed from the side. A front caster 2 is mounted in front of a frame 1 of the chair, and a driving wheel 3 and a caster 4 are arranged in front of and behind a frame 5 of the truck. The mounted trolley is rotatably mounted via a support shaft 6 provided on the frame 5. Further, a stopper 7 is provided on the frame 1 of the chair and the frame 5 of the trolley so as to stop at a fixed angle in order to prevent falling backward.

FIG. 3 shows an example in which the present invention is applied to a wheelchair of a type in which a driving wheel is driven by a self-propelled handle via a belt, and a self-propelled handle 8 is mounted above a frame of a bogie. It is. In this case, since the drive wheels can be made smaller, it is advantageous to set the position of the support shaft mounted on the bogie frame and to set the load distribution of each wheel.

FIG. 4 shows an example of a bogie in which rear casters are arranged at the rear center of the frame. Since there is no interference between the casters and the drive wheels, casters having a large diameter can be mounted.

[Effect of the invention]

 Since the present invention is configured as described above, it is possible to change the direction around the user's body, and to push the drive wheel forward when the drive wheel hits a step as shown in FIG. Then, the force to push the chair backwards by the reaction force lifts the casters in front, and it can get over some steps without any special operation.

[0009]

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a trolley-type wheelchair of the present invention as viewed from the side.

FIG. 2 is a side view showing a state in which the cart-type chair according to the present invention goes over a step.

FIG. 3 is a side view of an example in which the present invention is applied to a wheelchair in which a driving wheel is driven by a self-propelled handle via a belt.

FIG. 4 is a truck having casters arranged in the rear center.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Chair frame 2 Caster 3 Drive wheel 4 Caster 5 Dolly frame 6 Support shaft 7 Stopper 8 Self-propelled handle

Claims (1)

[Utility model registration claims] 1. A truck frame (5) as shown in FIG.
A drive wheel (3) is mounted on the front and casters (4) are mounted on the rear.
Is mounted to form a dolly, and the dolly is mounted via a support shaft (6) provided on the dolly frame (5) behind a chair frame (1) on which a caster (2) is mounted in front. A trolley-type wheelchair characterized by that: