JPH0247939Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mechanism for attaching the main wheels of a wheelchair.

[Conventional problems]

2. Description of the Related Art Wheelchairs with main wheels that are tilted downward and open downward are used as wheelchairs for sports such as basketball, marathons, and tennis for people with physical disabilities. This inclination of the main wheels increases the stability of the wheelchair and prevents it from tipping over when turning or the like.

However, since the main wheels of the above-mentioned wheelchairs are fixed in a downwardly open position, the width of the wheelchair becomes large, and when used indoors, it may be difficult to pass through the door, or the main wheels may open downward. There was a problem that the door could be damaged by coming into contact with it.

[Means for solving problems]

In the present invention, as a means for solving the above-mentioned conventional problems, a bearing block 3 is rotatably attached to both sides of the wheelchair 1, and the main wheels are attached to one side and the other side of the bearing block 3, respectively. Axle mounting portions 34 and 36 to which the axle 6A of No. 6 is fitted are provided, and the bearing block 3 serves as a fixing means in a state in which the one surface is located on the side surface and in a state in which the other surface is located on the side surface. When the axle 6A of the main wheel 6 is fitted to the shaft mounting portion 36 provided on the one surface in a state where the main wheel 6 can be fixed and the one surface is located on the side surface, the main wheel 6 When the axle 6A of the main wheel 6 is fitted into the shaft mounting portion 34 provided on the other surface in a vertical state with the other surface located on the side surface, the main wheel 6 opens downward. A mechanism for attaching the main wheels of a wheelchair in a tilted state is provided.

[Effect]

When one side of the bearing block rotatably attached to both sides of the wheelchair is fixed to the side of the wheelchair, the main wheel When the axle is fitted, the main wheel is tilted downward. When the bearing block is rotated and fixed with the other side of the bearing block positioned on the side of the wheelchair, the axle of the main wheel is fitted through the shaft attachment part provided on the other side. Then, the main wheel becomes vertical.

[Effect of the invention] Therefore, with the main wheel attachment mechanism of the wheelchair of the present invention, the main wheel can be installed in a vertical position or in an inclined position that opens downward. If the main wheels are placed in a vertical position after being used in the open position, the width of the vehicle will be reduced and will not impede movement indoors.

〔Example〕

To explain the present invention with an embodiment shown in FIGS. 1 to 7, main wheel attachment mechanisms 1B and 1B are provided on both sides of a frame 1A of a wheelchair 1, respectively.
The main wheel mounting mechanism 1B consists of brackets 2, 2' extending from the frame 1A and a bearing block 3 mounted on the brackets 2, 2'. The bearing block 3 consists of a main body 30 and flange portions 31, 31 extended from the front and rear of the main body 30, and thread grooves (not shown) are provided on the side surface 33 and bottom surface 35 of the main body 30, and the Bolts 34A and 34A having fitting holes 34C and 36C into which the axle 6A of the main wheel 6 is to be fitted are tightened and fixed in the grooves through nuts 34B and 36B, respectively, thereby forming main wheel shaft mounting parts 34 and 36. has been done. flange part 31,
32, the upper edge is longer than the lower edge, and a pair of shaft through holes 31A, 31B, 32A, 32B are provided near the tips of the upper edges of the flange portions 31 and 32, respectively, and near the tips of the lower edges, A pair of shaft holes 31
C, 31D, 32C, 32D are provided,
Furthermore, a pair of shaft through holes 31E, 31F, 32E, 32 are provided near the upper edges of the flange portions 31, 32 on the main body side.
F is provided. Brackets 2, 2' have shaft through holes 2A, 2B, 2'A, 2'B at upper and lower diagonal positions.
The bearing block 3 extends from the shaft through hole 2B of the bracket 2 to the shaft through holes 31C and 3 at the lower edge of the flange portions 31 and 32 of the bearing block 3.
A support shaft 4 is removably inserted into the shaft through hole 2'B of the bracket 2' via 1D, 32C, and 32D.
It is rotatably supported by the brackets 2, 2'.

In the main wheel mounting mechanism 1B having the above configuration, the shaft through holes 2A, 2'A of the brackets 2, 2' are inserted into the shaft through holes 31A, 31B, 32A, 32B near the upper edge tips of the flange parts 31, 32 of the bearing block 3. When the fixing rod 5 detachably spanned between them is inserted, the bearing block 3 is fixed to the brackets 2, 2'.
As shown in FIG. 3, the main body 3 of the bearing block 3
The side surface 33 of the wheelchair 1 is positioned outwardly from the brackets 2, 2' and on the side surface of the wheelchair 1. In this state, the bearing block 3 is fixed with the side surface 33 facing slightly upward, and the main shaft 6 is fitted into the shaft mounting portion 34 provided on the side surface 33, as shown in FIG. A pair of protrusions 6B, 6B provided on the axle 6A of the main shaft 6 so as to be retractable by the biasing force of a spring are engaged with the outer peripheral edge of the tip of the bolt 34A of the shaft mounting portion 34, so that the main wheel 6 is fixed. Ru. At this time, since the side surface 33 of the main wheel 6 is fixed slightly upward, the main wheel 6 is fixed in an inclined state opening downward by .theta. with respect to the vertical direction, as shown in FIG. Also side 3
Since the main wheels 3 are located outward from the brackets 2 and 2', they do not come into contact with the frame 1A of the wheelchair 1 even when the main wheels 6 are in an inclined state.

Next, the fixing rod 5 fixing the bearing block 3 and the brackets 2, 2' is removed, and the bearing block 3 is rotated via the support rod 4, so that the flange of the bearing block 3 is fixed as shown in FIG. Part 31, 32
Shaft through holes 31E, 31F, 3 near the upstream side of the main body
2E, 32F and bracket 2, 2' shaft through hole 2
The bearing block 3 is fixed by inserting the fixing rod 5 through A and 2'A facing each other. In this state, the bottom surface 35 of the main body 30 of the bearing block 3 is positioned perpendicularly to the side surface of the wheelchair 1, and the bolt 36A of the shaft attachment portion 36 of the bottom surface 35 is fitted into the insertion hole 36.
When the axle 6A of the main wheel 6 is fitted and fixed to C, the main wheel 6
is fixed in a vertical position as shown in FIG.

As described above, the present invention allows the main wheel 6 to be set in the wheelchair 1 in either a downwardly inclined position or a vertical position by simply changing the mounting direction of the bearing block 3, and the flange portion of the bearing block 3 A pair of shaft through holes 3 provided in 31 and 32
1A, 31B, 31C, 31D, 31E, 31
F, 32A, 32B, 32C, 32D, 32E,
Select 32F as appropriate and attach the support shaft 4 or fixed rod 5.
By penetrating the bearing block 3, the fixed height or angle of the bearing block 3 can be adjusted, and the mounting condition of the main shaft 6 can also be adjusted. For example, as shown in FIG.
When the support rod 4 is inserted through D and 32D to support the bearing block 3, and the fixing rod 5 is inserted through the shaft through holes 31B and 32B and fixed to the bearing block 3, the side surface 33 of the bearing block 3 becomes the third Since the main wheel 6 is tilted upward slightly more than in the case shown in the figure, when the main wheel 6 is attached via the shaft attachment part 34, it is tilted downward at an angle θ' that is slightly larger than the angle θ in FIG. 3. It is said that Furthermore, by adjusting the mounting depth of the bolts 34A, 36A of the shaft mounting portions 34, 36 of the bearing block 3 with the nuts 34B, 36B, it is also possible to adjust the mutual mounting width of the main wheels 6. It is.

Another embodiment is shown in FIG. In this embodiment, the width of the bearing block 3A is the width of the brackets 20, 2.
A pair of shaft through holes 31'C, 31' are provided near the tips of the lower edges of the flange portions 31A, 32A of the bearing block 3A.
Thread grooves are formed in D, 32'C, 32'D, and the shaft through holes 31'C (31'D), 32'C (32'C)
2'D) is threaded with a threaded rod 4A that is passed between the brackets 20 and 20', and is attached to the bearing block 3A.
are supported by brackets 20, 20'. In this embodiment, when the bearing block 3A is supported by the brackets 20, 20', a gap is created between the bearing block 3A and the brackets 20, 20'. 3A through the shaft hole 31'C (3
1'D) and 32'C (32'D), it is possible to slide the threaded rod 4A back and forth as shown by the arrow in FIG. It is possible to adjust it in the front-back direction.

Alternatively, in this embodiment, a fixing rod may be used instead of the threaded rod, and a collar may be interposed in the gap between the bearing block and the bracket to fix the bearing block in a predetermined position.

[Brief explanation of the drawing]

Figures 1 to 7 show an embodiment of the present invention, with Figure 1 being a perspective view, Figure 2 being an explanatory perspective view before fixing the bearing block, and Figure 3 showing the main wheel looking down. Figure 4 is a perspective view of the main wheels installed in a vertical position.
Figure 5 is an explanatory diagram when the main wheel is installed vertically, Figure 6 is a perspective view of the main wheel, Figure 7 is a perspective view of the wheelchair, and Figure 8 is an illustration of the main wheel installed by changing the fixed angle of the bearing block. FIG. 9 is an explanatory diagram of the bearing block in another embodiment. In the diagram, 1...wheelchair, 2, 2'...bracket,
3...Bearing block, 4...Support rod, 5...Fixing rod, 6...Main wheel, 6A...Axle, 33...Side surface, 35...Bottom surface, 34, 36...Shaft mounting portion.

Claims (1)

[Scope of utility model registration request] Bearing blocks are rotatably attached to both sides of the wheelchair, and shaft mounting portions into which the axles of the main wheels are fitted are provided on one surface and the other surface of the bearing blocks, respectively. The fixing means can be fixed in a state in which one surface is located on the side surface and in a state in which the other surface is located in the side surface, and is provided on the one surface in a state in which the one surface is located on the side surface. When the axle of the main wheel is fitted to the shaft mounting part provided on the other surface, the main wheel is in a vertical state and the other surface is located on the side surface. A main wheel attachment mechanism for a wheelchair, characterized in that when the main wheel axle is fitted, the main wheel is in an inclined state that opens downward.