JPH07112009A - Wheelchair - Google Patents

Abstract

PURPOSE:To facilitate production and to permit easy change of specifications in the transverse width size of a vehicle body according to accepted order. CONSTITUTION:This wheelchair has left and right side frames 2L, 2R and a seating sheet supporting frame 3 which foldably connects these frames. A seating sheet and the supporting frame 3 form square frame-shaped left and right link members 3L, 3R by fixing a connecting pipe 16 to be mounted at the side frames to the bottom ends of two pieces of front and rear equal-length links 15 and a supporting pipe 17 to be mounted with the seating sheet to the top ends thereof. The left and right link members are intersected to an X shape and the intersected part thereof is pivotally connected by a connecting shaft 14, by which the wheelchair is constituted. The left and right link members constituting the seating sheet supporting frame 3 of such wheelchair are constituted by forming the connecting pipe 16 and the supporting pipe 17 as separate bodies from two pieces of the equal-length links 15 and providing these members respectively with fitting parts 18, 19. Two pieces of the equal-length links 15, the connecting pipe 16 and the supporting pipe 17 are integrally connected by fitting.

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 in which the width dimension of a vehicle body can be easily changed according to an order received.

[0002]

2. Description of the Related Art A conventional wheelchair is constructed by connecting left and right side frames 102, 103 having rear wheels 100 and front wheel casters 101 mounted thereon by a seat seat support frame 104 so as to be foldable as shown in FIGS. ing.

By the way, the conventional seat seat support frame 104
Shows two equal-length links 105, 1 before and after as shown in FIG.
A connecting pipe 107 attached to the side frame 102 is fixed to the lower end of 06, and a support pipe 109 for attaching the seat sheet 108 is fixed to the upper end by welding, and the left and right link members 110, 11 in the shape of a square frame are connected.
1 is formed, the left and right link members 110 and 111 are crossed in an X shape, and the crossing portions are pivotally connected by connecting shafts 112 and 112.

[0004]

In the conventional wheelchair, the left and right link members 110 and 111 for constructing the seat seat support frame 104 are provided with front and rear equal length links 10.
Since the connecting pipe 107 and the support pipe 109 are directly welded to the upper and lower ends of the pipe 5, 106, respectively, the welding work is troublesome, and the welding causes distortion in the link members 110, 111. However, there is a problem in that the modification work is very troublesome and the cost is high.

Further, a plurality of kinds of link members must be always kept in stock according to the lateral size of the vehicle body, which requires various spaces such as storage, resulting in high management costs. .

[0006]

DISCLOSURE OF THE INVENTION The present invention is intended to solve the above-mentioned problems. A left and right side frame to which rear wheels and front wheel casters are respectively attached and a seat for connecting the left and right side frames in a foldable manner. A seat support frame is provided, and the seat seat and the support frame have a rectangular frame shape in which a connecting pipe to be attached to a side frame is fixed to the lower ends of front and rear two equal-length links, and a supporting pipe to which the seat sheet is attached is fixed to the upper end. A left and right link member that constitutes the seat seat support frame in a wheelchair in which the left and right link members are formed, and the left and right link members are intersected in an X shape and the intersections are pivotally connected by a connecting shaft. The connecting pipe and the support pipe are formed separately from the two equal-length links, and a fitting portion is provided for each of them to integrally connect the two equal-length links with the connecting pipe and the support pipe. It is something that is done.

[0007]

In the wheelchair constructed as described above, the square frame-shaped left and right link members constituting the seat seat support frame are attached to the front and rear 2
Since the equal length link of the book and the connecting pipe and the supporting pipe are integrally formed by fitting without welding, troublesome welding work is unnecessary, and distortion due to welding is eliminated. This makes it possible to improve work efficiency.

Further, the equal length link, the connecting pipe, and the support pipe are separately prepared, and a seat seat support frame suitable for a desired lateral width size of the vehicle body is prepared only by changing the length of the equal length link according to the order. Since it can be manufactured, inventory management becomes very easy.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a perspective view of a wheelchair according to an embodiment of the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a perspective view showing a frame structure.
The wheelchair is generally designated by 1. The wheelchair 1 includes a pair of left and right side frames 2L and 2R and a foldable seat seat support frame 3 that connects the side frames 2L and 2R to each other.

The left and right side frames 2L and 2R are shown in FIGS.
As shown in FIG. 3, the lower end of the backrest support pipe 7 having the bearing 6 of the rear wheel 5 is connected to the rear part of the horizontal base pipe 4, and the upper part of the backrest support pipe 7 and the front part of the base pipe 4 are inverted L-shaped. It is configured by connecting the respective ends of the armrest receiving pipes 8 that are bent in a curved shape, and further horizontally extending a horizontal pipe 9 between the vertical portions of the backrest support pipe 7 and the armrest receiving pipes 8 to connect both ends. . Further, a support pipe 11 for mounting the foot plate 10 and a leg pipe 13 for mounting the front wheel casters 12 are connected to the front ends of the left and right side frames 2L, 2R.

The seat seat support frame 3 is shown in FIGS. 5 and 6.
As shown in FIG. 4, the left and right link members 3L and 3R each having a rectangular frame shape are crossed in an X shape, and the crossing portion is connected to a connecting shaft 1 such as a bolt.
It is configured by pivotally connecting via 4, 14.

The left and right link members 3L and 3R are two front and rear equal-length links 15 and 15 made of light alloy pipe members.
And a support pipe 17 to which a connecting pipe 16 made of synthetic resin and a seat sheet 22 which are respectively coupled to the upper end and the lower end thereof are attached
And a projection-shaped fitting portion 18, 18 projectingly provided on the connecting pipe 16 at the lower end of the equal-length links 15, 15.
Further, the fitting portions 19 and 19 projecting from the support pipe 17 are fitted to the upper ends of the equal-length links 15 and 15, respectively, and the rivet stopper 2 is attached.
It is fixed by 0 and integrated.

Then, as shown in FIG. 3, the connecting pipe 16 of one of the link members 3L is rotatably held at a substantially central portion of the base pipe 4 of the side frame 2L, and the other link member 3 is held.
The R connecting pipe 16 is rotatably supported at the substantially central portion of the base pipe 4 of the side frame 2R, and the backrest support pipes 7, 7 of the left and right side frames 2L, 2R and the links 15, 15 at the rear position are further supported. By pivotally connecting the connecting pieces 21 and 21, both side frames 2L and 2R are assembled so as to be foldable as shown by a chain line in FIG.

The rear wheel 5 is cantilevered through a bearing 6 through an axle, and the foot plate 10 is attached to a support rod 22 which is detachably inserted into an open end of a support tube 11. Further, the front wheel caster 12 is supported by inserting a connecting rod protruding from the upper end thereof into the open end of the leg tube 13 from below, and the seat seat 22 has both ends wound around the support tubes 17, 17 of the seat seat support frame 3. Installed. Other, 23 in the figure
Is an upper backrest seat, and 24 is a lower backrest seat.

[0015]

Since the present invention is constructed as described above, it has the following effects.

The square frame-shaped left and right link members constituting the seat seat support frame are divided into two front and rear equal-length links and a connecting pipe to which the connecting pipe and the seat seat are attached. By adopting a configuration in which the connecting parts protruding from the connecting pipe and the supporting pipe are fitted to both ends of the equal-length link to be integrated, the troublesome work such as welding is unnecessary, and it is caused by welding. Since the distortion can be eliminated, the seat seat support frame can be easily manufactured.

Further, the lateral size of the vehicle body can be easily changed by simply changing the lengths of the two front and rear equal length links, and the equal length link, the connecting pipe and the support pipe are separately stored. Therefore, it is possible to reduce the management cost such as inventory management without taking up space.

[Brief description of drawings]

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

FIG. 2 is a front view of the same.

FIG. 3 is a perspective view of a frame structure.

FIG. 4 is an operation explanatory view for explaining folding of the frame.

FIG. 5 is a perspective view of a seat seat support frame.

FIG. 6 is an exploded perspective view of the same.

FIG. 7 is a perspective view of a conventional wheelchair.

FIG. 8 is a perspective view of a conventional seat seat support frame.

[Explanation of symbols]

 1 Wheelchair 2L, 2R Side frame 3 Seat seat support frame 3L, 3R Link member 5,5 Rear wheel 15,15 Isometric link 16 Connection pipe 17 Support pipe 18,19 Fitting part 22 Seat seat

Claims (1)

[Claims] 1. A left and right side frame having rear wheels and front wheel casters attached thereto, respectively, and a seat seat support frame connecting the left and right side frames in a foldable manner. A connecting pipe to be attached to the side frame is fixed to the lower end of the equal-length link, and a supporting pipe for attaching a seat sheet is fixed to the upper end to form left and right link members in the shape of a square frame. In a wheelchair in which the intersections are pivotally connected by a connecting shaft, the left and right link members that form the seat seat support frame have the connecting pipe and the supporting pipe separated from the two equal-length links. A wheelchair characterized by being formed and provided with a fitting portion for each, and two equal-length links and a connecting pipe and a support pipe being integrally connected by fitting.