JP2001025486A - Wheelchair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a seat portion easily replaceable and a wheelchair compactly collapsible by structuring the seat portion provided above a support frame supporting right and left wheels attachable to and detachable from the support frame. SOLUTION: A wheelchair 1 has a body 4 made up of a support frame 5 supporting wheels 2 and 3. However, a seat portion 7 on which a user sits is provided detachably above the support frame 5. The support frame 5 is structured by providing a set of right and left wheel supports 8 and 8 supporting the front and rear, large and small wheels 2 and 3, a linking mechanism 10 installed between the wheel supports 8 and 8 and extendible right and left, a seat receiving portion 11 provided above the linking mechanism 10. The seat portion 7 consists of a seat plate 16 and a backrest 17, a latching portion 18 provided at the bottom 16a of the seat plate 16 engages freely with the seat receiving portion (receiving bar) 11, and is fixed by latching a hook 19 onto the receiving bar 11.

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 a seat on which a person sits can be removed and replaced.

[0002]

2. Description of the Related Art Conventionally, a wheelchair generally has a pair of large and small wheels 31, 32 on the left and right sides supported by a support frame 33, as shown in FIG.
The support frame 33 has a structure in which a flexible cloth seat portion 34 is stretched, and the support frame 33 is extendable and contractable in the left-right direction.

[0003] With respect to the support frame 33, specifically, the support frame 33 includes front and rear large and small wheels 31, 32.
A pair of left and right support portions 36, 36 for rotatably supporting the
A link mechanism 37 erected between the support portions 36, 36, wherein two rods 38, 38 are pivotally supported at a central portion 38a, and each lower end 38b,
38b are pivotally supported below the left and right support portions 36, 36, respectively, and the upper end portions 38 of the rods 38, 38
and a link mechanism 37 having a structure in which c and 38c are slidably inserted into the vertical rods of the support portions 36 and 36 so as to be vertically slidable. Mounting rods 39, 39 in the direction perpendicular to the
Are provided on the seat mounting rods 39, 39.
Are attached by sewing or the like to form a seat 34. Such a wheelchair 30 can be used as a wheelchair by expanding the link mechanism 37 by contracting the link mechanism 37 and thereby folding the seat 34 made of cloth, thereby making the wheelchair 30 compact. .

[0004]

Incidentally, some users have a desire to change the appearance of the wheelchair as necessary, but in the above-mentioned conventional wheelchair 30, both ends of the seat 34 are Since it is fixedly attached to the support frame 33, the seat 34 cannot be easily replaced. In recent years, the use of wheelchairs at home has been increasing.For example, when using in a Western-style room, the appearance of a wheelchair that matches the atmosphere of the Western-style room, and when using in a Japanese-style room, a wheelchair that matches the atmosphere of the Japanese-style room Concerning wheelchairs, such as appearance, diversification of consumer needs is occurring. However, in the conventional wheelchair, a user must prepare a plurality of wheelchairs in order to satisfy the requirement. Further, in the above-described conventional wheelchair 30, since the seat portion 34 is made of a soft cloth, some users may feel that the seating is not stable and the sitting comfort is poor.

Therefore, it is a second object of the present invention to provide a wheelchair in which a seat can be easily replaced, and to provide a wheelchair which can be folded and made compact. A third object is to provide a wheelchair excellent in sitting comfort.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a first invention for solving the problems.
Means comprises a support frame 5 for supporting the left and right wheels 2,
A seat 7 provided above the support frame 5, and the seat 7 is configured to be detachable from the support frame 5. The left and right refer to the left and right sides when the entrance of the wheelchair is viewed from the front.

In such a wheelchair, since the seat 7 is provided detachably with respect to the support frame 5, the seat 7 can be easily mounted.
Can be removed and replaced with a seat 7 having a different design. The fact that the seat 7 is detachable from the support frame 5 means that the seat 7 can be removed without damaging the seat 7 and the support frame 5 and that the seat 7 can be attached without using a new member. For example, a configuration in which the seat 7 is freely detachable from the support frame 5 via a retaining portion 18 like a retaining portion described later, or a configuration in which the A configuration in which the fitting is made detachable by fitting, and a configuration in which the seat 7 is detachably attached to the support frame 5 using a fastening member such as a screw or a bolt nut are exemplified.

[0008] A second means for solving the above-mentioned problems is as follows.
A support frame 5 for supporting the left and right wheels 2 and a seat 7 provided above the support frame 5 are provided, and the support frame 5 is configured to be able to expand and contract in the left-right direction,
The seat 7 is configured to be detachable from the support frame 5.

In such a wheelchair, not only can the seat portion 7 be easily replaced, but also the wheelchair can be folded down in the left-right direction and stored compactly.

Further, a third means for solving the above-mentioned problems is that the support frame 5 includes left and right support portions 8 for supporting the wheels 2 and a link mechanism 10 bridged between the left and right support portions 8. A seat receiving portion 11 provided at each of the right and left upper ends of the link mechanism 10;
Numeral 0 is contractible in conjunction with the upward movement of the left and right seat receiving portions 11 and is expandable in conjunction with the downward movement, while the seat portion 7 has a seat plate 16 and the lower surface of the seat plate 16. The hooking portion 18 which can be hooked and unlocked on the seat receiving portion 11 and can restrict the expansion of the link mechanism 10 in the hooked state.
Is provided.

In such a wheelchair, since the seat 7 on which a person sits has the seat plate 16, there is a sense of stability and excellent sitting comfort as compared with a conventional cloth seat. Further, since the seat 7 is provided with a hook 18 that can be hooked and unhooked from the seat receiver 11 of the support frame 5, the seat 7 is attached to and detached from the support frame 5 via the hook 18. be able to.

Further, the link mechanism 10 of the support frame 5
Can be extended in conjunction with the downward movement of the left and right seat receiving portions 11, 11, so that the seat plate 16 of the seat 7 can be attached to the seat receiving portions 11, 11.
11 and pushed down, the link mechanism 10
Automatically expands. When the seat portion 7 is further pressed down, the hook portion 18 provided on the lower surface of the seat plate 16 is hooked on the seat receiving portion 11, and expansion of the link mechanism 10 is regulated in this hooked state, and The seat 7 is attached to the support frame 5 via the portion 18. When the seat 7 is detached, the link mechanism 10 contracts in conjunction with the upward movement of the seat receiving portion 11 by pulling the seat 7 upward with respect to the support frame 5. The hooked state of the seat 18 and the seat receiving portion 11 is released, and the seat 7 can be easily removed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a wheelchair according to the present invention will be described with reference to the drawings. In FIG. 1 to FIG.
1 shows a wheelchair according to the present invention. In the wheelchair 1, a seat 7 on which a user sits is detachably provided above a support frame 5 of a vehicle body 4 including wheels 2, 3 and a support frame 5 for supporting the wheels 2, 3. It consists of a configuration.

Specifically, the wheels 2 and 3 rotate about a rotation axis parallel to the running surface, and are rotatably provided on the support frame 5 so that the wheelchair 1 can run and do not roll over. For example, a pair of large-diameter wheels 2 and 2 (one each on the left and right) and a front of the large-diameter wheels 2 and 2,
A pair of independent small-diameter wheels 3 is provided on the left and right. The large-diameter wheels 2 and 2 are wheels whose traveling direction is only one direction (front-rear direction), while the small-diameter wheels 3 and 3 are traveling wheels so that the traveling direction of the wheelchair 1 can be changed. Is an omnidirectional wheel rotatable about a vertical axis.

The support frame 5 includes front and rear large and small wheels 2,
1 and a pair of left and right wheel support portions 8 and 8 for supporting the vehicle 3 freely.
And a link mechanism 10 provided between the wheel support portions 8
And a seat receiving portion 11 provided above the link mechanism 10.
And

The link mechanism 10 includes two rods 12, 1
2 has a structure in which a pair of link members 14 rotatably supported at the center 12a thereof are provided in front and rear. The lower ends 12b, 12b of the rods 12, 12 are rotatably supported by the wheel supports 8, 8, respectively, and the upper ends 12c, 12c of the rods 12, 12 are free ends. One of the front and rear link members 14 has a receiving rod 11 fixed to the upper end portions 12c, 12c of one of the front and rear rods 12 as a seat receiving portion 11, and the other of the front and rear link members 14 Upper end 12 of front and rear rods 12
Similarly, receiving rods 11 are fixed to c and 12c as seat receiving portions 11. That is, independent left and right receiving rods 11, 12 are provided at the left and right upper end portions 12c, 12c of the link mechanism 10, respectively.
11 are provided in the front-rear direction.

By moving the seat receiving portions 11 upward, as shown in FIG. 2, the rods 12 are interlocked, and the left and right rods 12, 12 rotate relative to each other to contract the link mechanism 10. Conversely, when the seat receiving portions 11, 11 are moved downward, as shown in FIG. 3, the link mechanism 10 is interlocked and expanded, that is, the link mechanism 10 is moved in the left-right direction (the large-diameter wheel 2). , 2). As described above, the vehicle body 4 can be compactly folded by expanding and contracting the link mechanism 10 in the left-right direction.

Next, the seat portion 7 has a seat plate 16 on which a person can sit and a backrest portion 17. The seat plate 16 is non-flexible (e.g., a wooden plate). That does not bend).

Specifically, as shown in FIG. 1, for example, the seat portion 7 is formed of a wooden chair, and the lower surface 1 of the seat plate 16 is provided.
The hook 6a is provided with a hook 18 which can be hooked on and removed from the receiving rod 11. The engaging portion 18 is capable of inserting the receiving rod 11 from the outside, and includes, for example, a hook 19 having an opening through which the receiving rod 11 can be inserted and removed. The hooks 19 are provided at four corners (front, rear, left and right ends) of the lower surface 16a of the seat plate 16.
And the right and left hooks 19, 19 are attached such that their openings face each other. The hook 1
By inserting the hooks 9 and 19 into the receiving rods 11 and hooking them, separation of the left and right receiving rods 11 of the link mechanism 10 is restricted, and the seat 7 is attached above the support frame 5. Incidentally, reference numeral 20 denotes a ramp on which the legs are placed.

In the wheelchair 1 having the above configuration, the seat 7 is detachably provided on the support frame 5, so that the seat 7 can be easily replaced.

More specifically, the support frame 5 has a link mechanism 10 which is expandable and contractible in the left-right direction.
0 is extended by moving the seat receiving portions 11 of the left and right upper end portions 12c, 12c downward, so that the support frame 5
By pressing down the seat plate 16 of the seat portion 7 from above, the seat receiving portions 11 are pressed by the lower surface 16a of the seat plate 16 as shown in FIG. . Further, the lower surface 1 of the seat plate 16 of the seat 7
6a, a hook portion 1 which is hooked to the seat receiving portion 11 from the outside.
As shown in FIG. 4, when the link mechanism 10 expands by a predetermined amount, the latch 18 of the seat plate 16 starts to enter the seat receiving portion 11 from the outside, and further, the seat 7 is disengaged. By pressing down, as shown in FIG.
8, the seat receiving portion 11 is completely inserted into the hooking state.

With this hooking, the seat 7 is attached to the support frame 5, while the hook 18 prevents the link mechanism 10 of the support frame 5 from expanding and contracting.

When the seat 7 is to be removed, the seat receiving portion 11 is moved upward by strongly lifting the seat 7 upward while lightly holding the vehicle body 4, and the link mechanism 10 is moved in conjunction with this. Because of the contraction, the seat receiving portion 11 moves inward, separates from the hooking portion 18, and the seat 7 can be removed. For example, instead of the wooden seat 7 shown in FIG. 1, the seat 7 having a different design such as a rattan seat 7 as shown in FIG. 5 can be easily changed.

In the above-described embodiment, the seat 7 is detachable from the seat receiving portion 11 of the support frame 5 via the hooking portion 18. For example, as shown in FIG. A convex portion 22 is provided on the lower surface 16a of the seat plate 16 of the seat portion 7, and a concave portion 23 is provided on the seat receiving portion 11 so as to fit into the convex portion 22. It may be detachably attached depending on the case. FIG. 6 (b)
As shown in the figure, the lower surface 16a of the seat plate 16
Is provided with a holding portion 24 capable of being strongly fitted by elastic force,
The seat 7 may be configured to be detachable from the support frame 5 via the embrace 24. Further, the seat 7 may be detachably attached to the support frame 5 using a fastening tool such as a bolt and a nut, and a specific configuration thereof can be appropriately designed.

In the above embodiment, the support frame 5 is configured to be expandable and contractible in the left-right direction by the link mechanism 10, but is not necessarily limited to the configuration of the link mechanism 10. It may be configured to be extendable and contractable by means of (1). It should be noted that if the support frame 5 is extendable and contractable, there is an advantage that the support frame 5 can be compactly stored when not in use, but this does not exclude the use of the support frame 5 which is inextensible.

[0026]

As described above, according to the wheelchair of the present invention, the seat can be freely replaced. Therefore, with one wheelchair, the seat can be easily changed according to the user's preference to obtain a wheelchair having a different design.

Furthermore, a wheelchair in which the support frame is configured to be able to expand and contract in the left-right direction can be compactly folded when not in use, and is convenient for storage. In addition, if a seat having a seat plate is used, the sitting comfort is excellent.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a wheelchair according to the present invention as viewed from the front upper side, and also shows a state where a seat is attached to a vehicle body by a two-dot line.

FIG. 2 is a schematic view of a main part of the vehicle body in a folded state as viewed from the back, and also shows a state where a seat is placed above a support frame by a two-dot chain line.

FIG. 3 is a schematic view of a main part of the vehicle body in an expanded state as viewed from the back, and also shows a state in which a seat is attached above a support frame, and a hook is hooked on a seat receiver. Indicated by a dotted line.

FIG. 4 is an exploded perspective view of a state immediately before the hook of the seat is hooked on the seat receiver, as viewed from the front upper side. The seat portion is indicated by a two-dot line.

FIG. 5 is a perspective view showing a seat of another embodiment.

FIGS. 6 (a) and (b) are schematic views of a partially omitted main part of another embodiment in which a seat is detachably attached to a support frame as viewed from the back.

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

[Explanation of symbols]

2 ... wheels, 5 support frames, 7 ... seats, 8 ... supports, 1
0 ... link mechanism, 11 ... seat receiving part, 16 ... seat plate, 18 ...
Hook

Claims (3)

[Claims] 1. A vehicle comprising: a support frame (5) for supporting left and right wheels (2); and a seat (7) provided above the support frame (5), wherein the seat (7) is A wheelchair characterized by being detachably attached to a support frame (5). 2. A support frame (5) for supporting left and right wheels (2), and a seat (7) provided above the support frame (5), wherein the support frame (5) comprises: The seat (7) is configured to be extendable and contractible in the left-right direction.
Is configured to be detachable from the support frame (5). 3. The left and right support portions (8) for supporting the wheels (2), a link mechanism (10) provided on the left and right support portions (8), and the support frame (5); And a seat receiving portion (11) provided at each of the left and right upper ends of the link mechanism (10).
The left and right seat receiving portions (11) contract and cooperate with the upward movement, and are expandable in conjunction with the downward movement, while the seat (7) has a seat plate (16) and the seat plate (16). (1
The lower surface of (6) is provided with a hook (18) that can be hooked and unhooked from the seat receiving portion (11) and restricts expansion of the link mechanism (10) in a hooked state. 2. Wheelchair according to 2.