JP2000024044A - Instantly developable folding wheelchair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a folding wheelchair easily and quickly developable by fixing a flat bar part to fix upper ends of a specific number of cross legs and right and left edges of a seat onto a set retaining member and connecting both ends of a bottomless isosceles triangle link comprising a specific number of members onto the lower end regulating the apex so as not to be in a constant angle by a hinge. SOLUTION: Legs protruded from seat retaining members 11 are crossed to form two sets of fore and hind crossing legs 12 and attached to rotatable parts on front and hind connecting members 10 respectively. The upper part of the crossing point of crossing legs 12 and a rear wheel support member 2 are connected to attach a cross member 14 of the crossing leg 12. A short cylinder 16 is rotatably fit in front or back of a fixing position to the retaining member 11 on the upper end of the crossing leg 12 and the upper end of the fitting flat bar member 17 is welded and both ends of two links 18 are attached on the end by a hinge. A bottomless isosceles triangle is formed by links 18 and the apex is made not to be bent over a prescribed angle by a stopper and step board 19. Thus the wheelchair can be quickly developed into a usable condition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheelchair in which the time required to spread a folding wheelchair in a state of use can be made quicker and easier than in the prior art.

[0002]

Background of the Invention Most wheelchairs are currently foldable, but when the wheelchair is folded, the hand can be lifted down by inserting a hand along the front-rear center line of the seat and lifting it up. As soon as it is lifted, the left and right frames and wheels come closer to each other, and the folding is easily finished. However, unfolding a folded wheelchair for use is not as easy as folding it. First of all, if you open the gap between the two grips while lifting the rear wheel by holding the grip of the hand pushing part, the lower part of the car body will not spread enough regardless of the width of the grip easily becoming the width when used. The face sheet is in a state of sagging far above when used. Therefore, the spread is completed by turning the seat in front of the vehicle body and pressing the seat in the floating state against the seat receiver. It is not complicated, but when the sick person or the like performs this work by himself or when the caregiver is an elderly person or the like, the operation of turning or bending over the vehicle body is not easy.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a structure which makes the operation of spreading a folded wheelchair ready for use simple and quick.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a folding wheelchair, wherein a member for connecting left and right upper ends of two sets of cross legs and a member for fixing the left and right edges of the seat are provided. A flat cylindrical member is fixed downward by fitting a rotatable short cylinder in front of or behind the rear cross leg fixing portion of the holding member, and the length is 30 to 30 in the case of the cross leg fixing portion.
Although it is 40 cm, in the case of the back, it may be 20 to 40 cm.

The length is short enough to be able to be stepped on with one foot, but the two ends of an isosceles triangular link having no base are hinged to the lower ends of the right and left flat bar members with the apexes facing upward. A collapsible wheelchair that can be instantly expanded by providing a stopper / step plate so that the vertex does not fall below the horizontal straight line when the link becomes a horizontal straight line, and a spring is provided at the vertex portion to fold up the vertex when folding the car body It is.

[0006]

Conventionally, in order to spread a folded wheelchair in a state of use, in many cases, it is common for a caregiver to stand at the rear of the vehicle body and spread it with a grip of a hand pushing portion. However, as for the way of spreading the body, the upper end of the rear part easily spreads to the full width in use, but the lower part of the body is stopped while it is narrow and does not move even if force is applied. That is, the cross legs do not spread very much, and thus the seat is in a state of slack and floating above the surface of the seat member. The reason for this is to shorten the length of the vehicle body connecting bracket, that is, the tacking member that connects the upper part of the intersection of the cross legs and the rear wheel supporting member, or to reduce the connecting position so that the vehicle body becomes firm when in use. The reason for this is that the lower structure is prevented from spreading, and the lower and upper portions of the cross leg do not open, and the cross leg remains at the height of the leg.

[0007] Therefore, when the caregiver turns to the front of the vehicle body and pushes down the seat, the seat height is reduced, the upper end of the cross leg is widened, and the seat is also stretched in one plane and fits in the use position. At the same time, when the lower part of the cross leg is opened, the lower part of the vehicle body is also opened, the cross leg and the skid are also in the proper positions, and the width of the vehicle body is kept at an appropriate size. The length of the cross leg and the key or the mounting position on the rear wheel support member is for creating a stress state in the movable part,
If the use condition can be formed without this condition, the vehicle body will rattle and the seats will be recessed, making it not a comfortable vehicle. It is considered that a steady wheelchair is formed only after passing through this state.

Conventionally, in order to pass through the above-mentioned stress state and use the seat, the seat is turned down in front of the vehicle body as described above, and the seat is pushed down. The caregiver tries to push down the seat, and the caregiver spreads the vehicle body with the grip of the hand pushing part almost simultaneously, and at the same time, steps down the top of the link with one foot easily and quickly. Can be.

[0009] The structure is as described above by attaching both ends of an isosceles triangle without a base linking the two members to a flat bar member descending from the seat holding member with the apex facing up, and stepping on the apex. The same effect is obtained as when the seat holding member is pulled down and the seat is pushed down by hand. Note that the longer the short cylinder in which the flat bar member is attached to the seat holding member, the more rigid the link becomes in the front and rear. Fitting a short cylinder behind the rear cross leg and providing a link at the rear of the cross leg is easy and convenient,
The short cylinder becomes very short, and the rigidity of the link in the front-rear direction is reduced, so that the link may hit the rear cross leg. To prevent this, a short cylinder may be fitted in front of the rear cross leg, and the front and rear short cylinders may be connected with different materials.

[0010] The peak of the chevron of the link is structured to be stopped by a stopper / step plate projecting from the link so that it cannot be stepped below a straight line. If you make it into a mountain shape, it will be folded automatically when the body is folded.

[0011]

FIG. 1 is a side view of a folding wheelchair in which the present invention is incorporated and is opened in a half-open state, in which seats and other small articles are omitted. FIG. 2 is a rear view. The body structure of the wheelchair of the present invention is not different from the conventional folding wheelchair.
That is, the support member 2 of the rear wheel 1 extends upward to form the back member 3, and is further bent substantially horizontally at the upper portion to form the hand pushing portion 4. The support member 6 of the front wheel 5 bends horizontally upward to form an armrest 7 and is fixed to the back member 3. One end of the seat member 8 has a rear wheel support portion 2 and a rear member 3.
The other end extends horizontally horizontally and bends obliquely downward to provide a footrest 9 at the lower end. In addition, the front and rear connecting member 10 for connecting the front and rear wheels is also connected to form an outer frame.

The left and right edges of the seat are seat holding members 11.
The four legs projecting downward from the left and right seat holding members 11 cross each other to form two sets of front and rear cross legs 12, and each of the rotatable portions 1 of the front and rear connecting members 10
3 before and after. Further, the upper portion of the intersection of the rear cross leg 12 and the rear wheel support member 2 are connected to each other, and a cross leg cross member 14 is provided which becomes substantially horizontal when the vehicle body is opened. The above is a conventional folding wheelchair.

In this embodiment, the following members are added to the above structure. Rear cross leg 12 Seat holding member 11 at upper end
A rotatable short cylinder 16 is fitted before or after the fixed position to the body, and a flat bar member 17 of about 30 to 40 cm is welded downward to the center line side of the vehicle body, and two flat bars 17 of about 10 cm length are welded. Both ends of the link 18 to which the bar is hinged are hinged to the lower end of the flat bar member 17. The link 18 forms an isosceles triangle without a base, and the stopper / step plate 19 is attached so that the vertex does not always fall below the line of the base. Furthermore, when the treading power to the top is lost, so that it becomes a mountain shape,
A spring 20 is attached to the top.

[Brief description of the drawings]

FIG. 1 is a side view of a folding wheelchair to which the present invention is attached in a half-open state.

FIG. 2 is a rear view of the same.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 rear wheel 2 rear wheel support member 3 back member 4 hand pushing portion 5 front wheel 6 front wheel support portion 7 armrest portion 8 seat member 9 footrest portion 10 front and rear connecting member 11 seat seat holding member 12 cross leg 13 rotatable portion 14 Member 16 Short cylinder 17 Flat bar member 18 Link 19 Stopper and tread plate 20 Spring

[Procedure amendment]

[Submission date] July 22, 1998 (1998.7.2
2)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Fig. 1

[Correction method] Change

[Correction contents]

FIG.

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] Figure 2

[Correction method] Change

[Correction contents]

FIG. 2 ────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] September 29, 1998 (1998.9.2)
9)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 1

[Correction method] Change

[Correction contents]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction contents]

[0005] The center vertex of an isosceles triangle without a base consisting of two members is directed upward, and both ends of the link are hinged to the lower ends of the left and right flat bar members. This is a folding wheelchair that can be opened instantly when the seat holding member is pushed down, but if the vertex angle of the link is too wide at the time of folding, the link will not be folded at the time of folding, so the vertex angle will not exceed a certain angle Is provided with a stopper plate.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction contents]

In addition, a stopper / step plate welded and fixed to the upper side of one link is bent to the above angle so that the vertex of the link descends while maintaining a constant apex angle even when stepped on with the foot. Extend above. With this structure, the angle of the link is maintained, and when the vehicle body is folded, the link is folded according to the vehicle body.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction contents]

In this embodiment, the following members are added to the above structure. Rear cross leg 12 Seat holding member 11 at upper end
A rotatable short cylinder 16 is fitted to the front or rear of the fixed position, and the upper end of a flat bar member 17 having a length of about 30 to 40 cm is welded to the center side of the vehicle body, and two flat bars 17 having a length of about 10 cm are welded. Both ends of the link 18 to which the flat bar is hinged are hinged to the lower end of the flat bar member 17. The link 18 is in the form of an isosceles triangle without a base, and a tread is welded and fixed to the upper side of one of the links 18 so that the vertices do not always spread beyond a certain angle. It is extended to form the stopper stepping plate 19.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] Explanation of sign

[Correction method] Change

[Correction contents]

DESCRIPTION OF SYMBOLS 1 rear wheel 2 rear wheel support member 3 back member 4 hand pushing portion 5 front wheel 6 front wheel support portion 7 armrest portion 8 seat member 9 footrest portion 10 front and rear connecting member 11 seat seat holding portion 12 cross leg 13 Rotatable part 14 Tack member 16 Short cylinder 17 Flat bar member 18 Link 19 Stopper foot plate

[Procedure amendment 6]

[Document name to be amended] Drawing

[Correction target item name] Figure 2

[Correction method] Change

[Correction contents]

FIG. 2

Claims (1)

[Claims] In a folding wheelchair, a rotatable short cylinder is fitted in front of or behind a connecting member on each of the right and left ends of two sets of cross legs, that is, a rear cross leg fixing portion of a seat holding member, and a flat bar member is lowered. And is hinged to the lower ends of the left and right flat bar members, with both ends of an isosceles triangular link consisting of two members without a base facing up, with the vertices facing up. When the link becomes a horizontal straight line, the vertex is A collapsible wheelchair that can be instantly spread by providing a stopper / foot plate so that it does not fall below the horizontal straight line, and a spring at the apex for folding the apex when the body is folded.