JP3038569B2 - wheelchair - Google Patents

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 structure of a wheelchair seat detachably attached to a body frame of a wheelchair and a structure of a backrest pipe constituting a body frame of a wheelchair. It is about.

[0002]

2. Description of the Related Art FIG. 1 is a perspective view showing the general structure of a general wheelchair. Main wheels 2 are attached to both sides of the main body frame 1, and hand rims 3 are provided beside each main wheel. The body frame 1
Two left and right back pipes 1a extending perpendicular to the traveling direction of the wheelchair, a front pipe 1b extending parallel to the traveling direction, a leg pipe 1c extending downward from the front end of the front pipe 1b, an upper end of the back pipe 1a and the front pipe Arc pipe 1 connecting the front end of the arm pipe 1b
d etc. A side cover 1e is provided between the arm pipe 1d, the back pipe 1a, and the front pipe 1b.

[0003] A cross frame 4 is provided below the main body frame 1, and by closing the cross frame 4, the entire wheelchair can be folded in the width direction. The cross frame 4 includes two cross pipes 4a crossing each other, an upper horizontal pipe 4b connected to upper ends of the cross pipes 4a, and extending in parallel with the traveling direction of the wheelchair. And a lower horizontal pipe 4c connected to the lower end and extending parallel to the traveling direction. The upper horizontal pipe 4b is the front pipe 1 of the main frame.
b, the lower horizontal pipe 4c is connected to the back pipe 1 via an auxiliary member 5.
a.

[0004] The front end of the lower horizontal pipe 4c is connected to the lower end of the front pipe 1b, and the caster wheel 6 and the brake device 7 are attached to both sides of the front pipe 1b. Further, a footrest 8 is provided below the leg pipe 1c.

[0005] The backrest 1 is attached to the back pipe 1a.
0, while the hip rest seat 12 is attached to the upper horizontal pipe 4b of the cross frame 4, and these seats constitute a seat portion on which the user sits.

[0006]

[Problems to be solved by the invention]

(First problem) In a conventional wheelchair, these seats are
It is fixedly attached to the body frame using rivets or screws. However, if the seat is fixedly attached to the body frame, if the seat becomes dirty, it must be removed while it is attached to the wheelchair, and it is difficult to remove the corners of the seat and the stains on the back side There is an inconvenience. Further, when the sheet is washed with water, water used for washing may be applied to the frame or the main wheel, causing rust.

Further, while the wheelchair is new, there is no slack in the seat, and the user can use the wheelchair comfortably. However, if the wheelchair has been used for a long period of time, the seat itself will extend, and the seat will be stretched. Good feeling of use cannot be maintained due to sagging. Since the conventional seat is fixedly attached to the main body frame, it is necessary to replace the seat in order to restore the seat that has once slackened to its original state, which requires a great deal of labor. Also, when a part of the sheet is damaged, it takes time to replace the sheet. Furthermore,
Even when it is desired to adjust the seat tension according to the user's physical condition or preference, it is difficult to adjust with a conventional wheelchair.

(Second Problem) In a conventional foldable wheelchair, the user has to push the body frame from both sides to fold the wheelchair. The most efficient way to fold the wheelchair is to push the center of the body frame from both sides, but the width of the wheelchair is so wide that the wheelchair cannot be pushed from both sides efficiently. Also, when the front end of the front pipe 1b or the upper end of the back pipe 1a is pushed from both sides, the fulcrum of the cross pipe 4a and the position to be pushed are greatly displaced. Cannot be folded. In particular, when a user switches from a wheelchair to a car, it is necessary to fold the wheelchair from a relatively high position such as a car seat, so conventional wheelchairs require a great deal of force to fold and are difficult to fold. Met. Further, since the cross pipe 4a has some resistance, if the cross pipe 4a is folded with an excessively strong force, there is an adverse effect such that the user may be injured by holding his hand or the like.

(Third Problem) The frame of the wheelchair is usually made of metal such as aluminum, and when closing the cross frame, the upper horizontal pipes 4b constituting the cross frame 4, the lower horizontal pipes 4c, or There is a problem in that the upper horizontal pipe 4b and the front pipe 1b constituting the body frame of the wheelchair collide with each other, so that the coating on that portion becomes bald and causes rust and corrosion of the frame.

(Fourth Problem) In a conventional wheelchair, each of the pipes constituting the main body frame 1 is a hollow pipe. The backrest pipe 1a forms a main part of the main body frame 1 of the wheelchair. The backrest seat 10 is attached to the backrest pipe 1a, and a user leans on the backrest seat 10. When the user sits down on the wheelchair, most of the weight of the user is applied to the backrest seat 10 and the hiprest seat 12, and the backrest pipe 1a and the front pipe 1b are passed through these seats. Applies a strong force inward. Since the front pipe 1b extends in parallel to the traveling direction of the wheelchair, a force is applied almost uniformly over the entire length of the pipe, and the inside is supported by the cross frame 4 or the like. There is not much problem even if strong power is added. However, the backrest pipe 1a
It extends vertically, and its lower end is a front pipe 1
b and the axle of the drive wheel 2, but the upper end is only connected to one end of the armrest pipe 1d.
It is almost free in the width direction. For this reason,
When the user sits down on the seat and leans on the back seat 10, the backrest pipe 1a is pulled by the back seat 10 and is bent upward.

If the wheelchair is used for a long period of time in such a state, the backrest pipe 1a, which is formed of hollow pipes, is gradually deformed, and the feeling of use of the wheelchair and the performance Has the problem of adversely affecting

[0012]

In order to solve the above-mentioned first problem, a wheelchair according to the first invention of the present application comprises a backrest attached to two back frames extending parallel to each other in a vertical direction. In a wheelchair comprising a seat and a hiprest seat attached to two side frames extending parallel to each other in the traveling direction of the wheelchair, the backrest seat and the hiprest seat are respectively a seat body and a cover. And a folded portion provided on both sides of the seat body, a surface fastener having a first structure is provided on one surface of the sheet body, and the surface fastener is attached to and detached from one surface of the cover portion. A surface fastener having a freely structured second structure is provided, and a surface fastener having the second structure is provided on one surface of the folded portion. A surface fastener provided with the first structure on the other side, the folded portion, folded by turning the outside of the back frame or side frames,
Interposed between the seat body and the cover portion, at least, a surface fastener having a first structure provided on the seat body and a surface fastener having a second structure provided on the folded portion are mounted, And, by attaching a hook-and-loop fastener having a second structure provided on the cover portion and a hook-and-loop fastener having a first structure provided on the folded portion, the backrest seat is attached to the back frame and the hip A rest seat is attached to each of the side frames.

As described above, in the wheelchair according to the present invention, the backrest seat and the hiprest seat each include the seat body, the cover portion, and the folded portions provided on both sides of the seat body. A hook-and-loop fastener having a first structure is provided on one surface, and a hook-and-loop fastener having a second structure detachably attached to the hook-and-loop fastener is provided on a cover portion. The surface fastener having the second structure and the surface fastener having the first structure are provided on the other surface. The folded portion is turned from the outside of the back frame or the side frame and folded to be interposed between the seat body and the cover portion. The hook-and-loop fastener having the first structure provided on the seat body and the folded portion are provided. A hook-and-loop fastener having a second structure is mounted, and further, a hook-and-loop fastener having a first structure provided on a folded portion and a hook-and-loop fastener having the first structure provided on a cover portion are mounted. The seat and hiprest seat are attached to the wheelchair frame.

That is, since each seat is detachable from the frame by attaching and detaching the fastener member, it is possible to remove these seats from the wheelchair body and wash only the seats. Therefore,
The entire seat can be kept clean at all times, and rust does not occur on the metal parts such as the frame, the wheel, and the brake device due to moisture during washing. In addition, if you want to replace the sheet itself due to damage or other causes,
The seat can be easily changed.

Further, since the hook-and-loop fastener is used,
The mounting position of the fasteners can be freely changed, and by shifting the mounting position, the tension of the seat can be adjusted. Therefore, the seat tension can be easily adjusted according to the physical condition and preference of the user of the wheelchair. Further, even when the seat becomes slack while using the wheelchair, the slack can be easily removed by reattaching the seat.

In a preferred embodiment of the wheelchair according to the first aspect of the present invention, the seat body, the cover portion, and the folded portion are integrally formed. Therefore, the seat can be easily attached and detached, and there is no inconvenience that a part of the sheet is lost at the time of washing or the like.

In a further preferred embodiment of the wheelchair according to the first invention of the present application, the folded portion is constituted by a plurality of belt-shaped members. The backrest seat and the hiprest seat are attached to the main body frame by passing the belt-shaped member through a gap between the back frame and an arm pipe to be described later, a side cover, and a guide hole provided in the side frame. By attaching each seat in this manner, the inconvenience of shifting the upper and lower positions of the backrest seat or the front and rear positions of the hiprest seat during use of the wheelchair is eliminated.

In a further preferred embodiment of the wheelchair of the first invention of the present application, the hook-and-loop fastener having the first structure is constituted by a hook-and-loop fastener having a large number of needle-like projections on a mounting surface. The hook-and-loop fastener having the structure of No. 2 is constituted by a hook-and-loop fastener having a large number of fine loops on the mounting surface. As such a hook-and-loop fastener, for example, magic tape (trade name) can be suitably used.

In order to solve the above-mentioned second problem, a wheelchair according to the second invention of the present application comprises a left and right upper horizontal member, a left and right lower horizontal member, A cross frame comprising a cross member connecting the horizontal members is provided, and the upper horizontal member is connected to a horizontal frame of the wheelchair body, and is configured to be foldable in the width direction. A belt-shaped member is stretched in the width direction of a wheelchair, and both ends of the belt-shaped member are fixed to a lower surface of the seat portion through an outer side of an upper horizontal member constituting the cross frame. It is.

As described above, in the wheelchair according to the second aspect of the present invention, the belt-shaped member is laid over the seat in the width direction of the wheelchair, and both ends of the belt-shaped member constitute a cross frame of the wheelchair. Since the upper horizontal member is fixed to the lower surface of the seat through the outside of the upper horizontal member, when the wheelchair is folded, the user pulls the belt member upward to force the cross frame through the belt member in a direction to close the cross frame. And the wheelchair can be easily folded.

In order to solve the above third problem, in the wheelchair according to the third invention of the present application, two upper left and right horizontal members, two left and right lower horizontal members, A cross frame comprising a cross member connecting the horizontal members, wherein the upper horizontal member is connected to a horizontal frame of a wheelchair main body, and is configured to be foldable in the width direction. Is provided with a protection member.

As described above, in the wheelchair according to the third aspect of the present invention, since the protection member is provided on the outer periphery of the upper horizontal member of the cross frame, when the wheelchair is folded, the upper horizontal members contacting each other, or the cross member. The upper horizontal members of the frame and the front pipe of the body frame of the wheelchair are protected so that these members are not damaged and the paint is not bald. Also, when the cross frame is opened, the weight of the user or the vibration when moving the wheelchair, etc., due to the upper horizontal member of the cross frame, and the hook member connecting the upper horizontal member and the front pipe of the wheelchair body. Can be reduced.

In a preferred embodiment of the third invention of the present application,
A protection member is also provided on the outer periphery of the lower horizontal member of the cross frame. With this configuration,
When the wheelchair is folded, the lower horizontal member of the cross frame can also be protected.

Further, in order to solve the above-mentioned fourth problem, a wheelchair according to a fourth invention of the present application is a wheelchair in which the backrest frame is made of a pipe material, wherein the backrest frame is made of a pipe material. A reinforcing member extending in the longitudinal direction of the pipe.

As described above, since the wheelchair according to the fourth invention of the present application is provided with the reinforcing member extending along the length direction of the backrest pipe, when the user sits down. Even if a strong force is applied to the backrest pipe inward, the backrest pipe is less likely to be deformed, and the durability of the wheelchair is improved.

In a preferred embodiment of the wheelchair of the fourth invention of the present application, the reinforcing member is constituted by a plate-like member,
The width direction of the plate-shaped member is matched with the width direction of the wheelchair. Therefore, the backrest pipe is reinforced particularly against the force applied in the width direction, and it is possible to provide a wheelchair that can withstand long-term use and is not easily deformed.

Further, in a further embodiment of the wheelchair according to the fourth invention of the present application, the reinforcing member is constituted by members extending in three directions at an interval of 120 ° from the center of the backrest pipe. It is a feature. For this reason, the backrest pipe is evenly reinforced against a force applied from any direction, and is hardly deformed. Also, since this backrest pipe is reinforced on average in all directions, it is not necessary to pay special attention to the mounting direction of the backrest pipe when assembling a wheelchair,
Assembly can be performed more easily.

[0028]

FIG. 2 is an expanded plan view of a backrest seat 10 used for a wheelchair according to the first invention of the present application. Since the configuration of the entire wheelchair is the same as that shown in FIG. 1, the description is omitted using the same reference numerals. The backrest seat 10 includes a backrest 10a (seat body), a cover 10b, and five belt-like members 10c on each side of the backrest 10a.

[0029] As shown in FIG.
A back fastener 10a having a large number of fine loops (hereinafter referred to as a "soft-type surface fastener") is provided almost entirely on the backrest portion 10a. Meanwhile, cover 1
Ob is provided with a surface fastener 11b (hereinafter, referred to as "hard type surface fastener") which has a large number of needle-like projections and is configured to be detachably attached to the soft type surface fastener. A hard surface fastener 11b is provided on the front surface of each belt-shaped member 10c, and a soft surface fastener is provided on the back surface. For example, Velcro (trade name) is suitable as these fastener members.

The soft-type surface fastener 11a provided on the backrest 10a connects the belt-like member 10c to the folded line T1.
When folded back, it is arranged so as to cover at least a portion facing the hard type surface fastener 11b provided on the surface of the belt-shaped member 10c.

On the other hand, the hook-and-loop fastener of the cover 10b is arranged so as to cover at least a portion opposed to the soft-type hook-and-loop fastener provided on the back surface of the belt-shaped member 10c when the cover 10b is folded inward along the folding line T2. ing. The cover 10b has a size such that it covers almost the entire backrest portion 10a when folded back.

The hard type surface fastener 11 extending in the width direction is provided on the folding line T2 of the backrest 10a.
d is provided, and soft corner fasteners 11e are provided at both corners next to the hook and loop fastener 11d. Belt-shaped member 10 at the folding line T1
When c is folded back, the soft type surface fastener provided in this corner and the hard type surface fastener 1 extending in the width direction
Both ends of 1d are attached to each other. A hard type surface fastener of the same size is attached to the back side of the surface fastener 11e. When the cover 10b is folded back along the folding line T2, the hard type surface fastener provided on the back side of the corner and the top surface The inner portion of the soft type surface fastener provided on the back surface of the belt-shaped member 10c is configured to be attached to each other.

Attachment of the backrest sheet firstly
The back pipe 1 of the wheelchair shown in FIG.
a, and at the folding line T1, the belt-like members 10c on both sides
Is turned around from the outside of the back pipe 1a, and the hard type surface fastener 11b attached to the surface of each belt-shaped member 10c and the soft type surface fastener 11a attached to the backrest portion 10a are attached to each other.
The cover 10b is folded back at the folding line T2, and the soft-type surface fastener attached to the back surface of each belt-shaped member 10c and the hard-type surface fastener attached to the cover 10b are attached to each other. In a portion where the belt-shaped member 10c is not interposed, the soft type surface fastener provided on the backrest 10a and the hard type surface fastener provided on the cover 10b are directly adhered.

One end of the arm pipe 1d is attached to the upper portion of the back pipe 1a, and a side cover 1e is provided below the arm pipe 1d. The uppermost belt-shaped member is folded over the arm pipe 1d, the lower belt-shaped member is folded back through a gap between the arm pipe 1d and the side cover 1e, and the third and fourth belt-shaped members are folded over the side cover 1e. At the back pipe 1a. Also, the lowermost belt-shaped member is folded back through the gap of the side cover 1e.

FIG. 3 is a view showing the direction in which the belt-like member 10c is mounted on the backrest 10a through the outside of the back frame 1a.

FIG. 4 is an expanded plan view of the hiprest seat 12 according to the present invention. Hip rest seat 12
A seat 12a (seat body), a cover 12b,
Left and right four belt-like members 1 provided on both sides of the seat 12a
2c.

As shown in FIG.
2 is symmetrically placed on the surface of the stool 12a.
A soft type surface fastener 13a is provided on almost the entire surface of a. In addition, on the surface of each belt-shaped member 12c,
A hard type surface fastener 13b detachably attached to the surface fastener 13a, and a soft type surface fastener is mounted on the back surface. Further, a hard type surface fastener 13c is provided on substantially the entire surface of the cover 12b symmetrically. As these fasteners,
As with the backrest sheet 10, it is appropriate to use Velcro (trade name) or the like.

The hook-and-loop fasteners 13a and 13b attached to the seat 12a and the cover 12b cover at least a portion of the belt-like member 12c facing the hook-and-loop fastener 13b provided on the belt-like member 12c when the belt-like member 12c is folded along the folding line T1. To place. Note that the cover 12b has a size that substantially covers the entire sitting portion 12a when the cover 12b is folded along the folding line T2. A protrusion 12d is provided at an end of the seat 12a opposite to the cover 12b, and a hook-and-loop fastener 13d extending in the width direction of the sheet 12 is attached to both front and back surfaces of the protrusion 12d. I have.
The surface fastener 13d has a hard type surface fastener on the front side,
A soft type hook-and-loop fastener is attached to the back side,
After the belt-shaped member 12c is folded at the folding line T1, the protruding portion 12d is folded at the folding line T3, and the hard-type surface fastener 13d provided on the surface of the protruding portion 12d and the back surface of the last belt-shaped member 12c. The provided soft type surface fastener 13b is attached. Further, the cover 12c is folded back at the folding line T2 so that the front end of the hard type surface fastener provided on the cover 12b and the soft type surface fastener provided on the back surface of the protrusion 12d are attached.

The hip rest seat 12 is attached to the cross member 4 provided on the body frame 1. FIG.
FIG. 5 is a view showing a state in which the hiprest seat 12 is mounted on the cross member 4, and the belt-like member 12 c of the hiprest seat 12 is passed in the direction shown by the arrow. The cross member 4 includes an upper horizontal pipe 4b extending parallel to the traveling direction of the wheelchair, and further includes a guide member 4d extending along the upper horizontal pipe 4b. Between the upper horizontal pipe 4b and the guide member 4d,
Four holes 15 are provided, and the hiprest seat 1
The second belt-like member 12c is attached to the cross member 4 through the hole 15.

FIG. 6 shows a horizontal pipe 4b of the cross member 4.
FIG. 9 is an enlarged view showing a cross section of the guide member 4d.

Attachment of the hip rest seat 12 is performed by first passing the belt-shaped member 12c through the hole 15 from the bottom to the top and turning it over, and the hard type surface fastener 13b and the surface of the seat 12a provided on the surface of the belt-shaped member 12c. And the soft type hook-and-loop fastener 13a
After adjusting the tension of “a”, the protruding portion 12 d is folded inward, and the hard type surface fastener 13 d and the soft type surface fastener on the back surface of the uppermost belt-like member 12 c in FIG. 4 are mounted. Next, the cover 12b is turned upside down, and the hard type surface fastener 13c of the cover 12b is turned on.
And a soft type surface fastener provided on the back surface of the belt-shaped member 12c. At this time, since a soft type surface fastener provided on the back surface of the protruding portion 12d is present at the rear end of the seat 12a, the front end of the cover 12b is attached to the surface fastener. In a portion where the belt-shaped member 12c is not interposed, the soft type surface fastener of the seat 12a and the hard type surface fastener of the cover 12b are directly adhered.

In the above-described embodiment, the folding wheelchair has been described as an example, but the wheelchair seat of the present invention is
It can also be applied to fixed wheelchairs. In this case, the hiprest seat is attached to a front pipe (a pipe extending parallel to each other in the traveling direction of the wheelchair) of the main body frame. It is preferable to provide a guide member on the front pipe and provide a hole through which the belt-shaped member of the hiprest seat passes.

The number of belt-like members provided on the backrest seat and the hiprest seat is not limited to the number in the above-described embodiment, but may be an appropriate number according to the structure of the wheelchair.

Further, in the above-described embodiment, the backrest portion of the backrest seat, the stool portion of the hiprest seat, and the soft-type hook-and-loop fastener are provided on the back surface of the belt-shaped member, and the backrest seat cover, the hiprest seat cover, Although the hard surface fastener is provided on the surface of the belt-shaped member, the structure of the surface fastener may be reversed.

FIG. 7 is a diagram showing the entire configuration of an embodiment of the wheelchair according to the second invention of the present application. As shown in FIG.
In the second invention of the present application, the folding belt 20 is stretched over the hiprest seat 12 in the width direction of the wheelchair, and the user can pull the belt member 20 to fold the wheelchair with one touch. . FIG.
It is a development view showing the configuration of this folding belt 20.
The configuration other than the belt 20 is the same as that of the wheelchair shown in FIG. Belt 2
0 at both ends of the hip rest seat 12
a and fastener members 13a and 13c provided on cover 12b
And a fastener member 21 that can be attached to the front and back surfaces.

As described above, the soft surface fastener 13a is provided on the surface of the seat 12a.
A hard surface fastener is provided on the surface of the cover 12b. At both ends of the folding belt 20, a soft-type surface fastener is provided on one surface and a hard-type surface fastener is provided on the other surface.
a and the cover 12b, these fasteners are attached, and both ends of the folding belt 20 are attached to the lower side of the hip rest seat 12 (the lower surface of the seat).

FIG. 9 is a diagram showing how the folding belt 20 is attached. The both ends of the folding belt 20 are turned around the outer side of the upper horizontal member 4b of the cross frame to be folded, and the two ends of the folding belt 20 are connected to the seat 12a of the hiprest seat 12,
It is interposed between the cover 12b. Folding belt 20
Type fastener 2 provided on one side of both ends
1 and the hard-type surface fastener of the seat 12a, and the soft-type surface fastener provided on the other surface and the hard-type surface fastener provided on the cover 12b. Hang it over the rest seat 12.
In addition, both ends of the folding belt 20 pass through the notch portion between the belt-like members 12c provided on both sides of the hip rest seat 12, and the seat 12a and the cover 12b.
And between them.

In the above-described embodiment, the hip rest seat 12 is configured to be detachable from the main body frame 1, and both ends of the folding belt 20 are attached to the hip rest seat 12 by using the fastener member 13 of the hip rest seat 12.
The folding belt 20 is mounted on the hip rest seat 12 by being attached to the lower side of the present invention, but the second invention of the present application is not limited to this embodiment. For example,
The present invention can be applied to a wheelchair in which the hiprest seat 12 is fixedly attached to the front frame of the main body frame with rivets or the like. In this case, the folding belt 20 is turned from the outside of the front frame, and both ends of the belt are sewn directly to the back surface of the hip rest seat 12 by using a fastener member for the above-described embodiment, or by sewing directly to the back surface of the hip rest seat 12. Be sure to fix it on the lower side.

FIG. 10 is a view showing the structure of one embodiment of the third invention of the present application, and shows the side surfaces of the horizontal pipe 4b and the guide member 4d of the cross member 4. As described above, between the horizontal pipe 4b and the guide member 4d, the holes 15 through which the belt members 12c of the hip rest seat 12 pass are formed at a predetermined interval by the number of the belt members 12c.
In the embodiment of the third invention of the present application, these holes 15 are located at positions where the front end hole 15a and the rear end hole 15b are provided.
A protection pipe 16 made of vinyl was attached around the horizontal pipe 4b. When the wheelchair is folded, the cross frame 4 is closed to reduce the distance between the main wheels 2, but when the cross frame 4 is closed, the horizontal pipes 4b constituting the cross frame 4 or the horizontal pipes 4b and the main frame are closed. 1, the protective pipe 16 is attached around the horizontal pipe 4b, so that the horizontal pipe 4b and the front pipe 1b of the main body frame 1 are damaged by an impact when the wheelchair is folded. Or baldness of the paint can be prevented. The material of the protection pipe 16 is not limited to vinyl, but may be any material, such as rubber, as long as it can reduce the impact when closing the cross frame. When the cross frame is closed, not only the upper horizontal pipe 4b but also the lower horizontal pipe 4c may collide with each other. Therefore, a protection pipe may be attached around the lower horizontal pipe 4c. preferable.

FIG. 11 is a sectional view showing the structure of the first embodiment of the back pipe used in the wheelchair according to the fourth invention of the present application. The configuration of the entire wheelchair is the same as that shown in FIG. 1, and a description thereof will be omitted.

As a pipe constituting the main body frame 1, an aluminum pipe is usually used in order to reduce the weight. However, as shown in FIG. 10, in the present embodiment, the pipe is provided inside the hollow inside the back pipe 1a. , A plate-like member 31 as a reinforcing member
And extends along the length direction of the back pipe 1. With this configuration, the strength of the back pipe 1a is increased. When assembling the wheelchair, the back pipe 1a is attached so that the width direction of the plate-shaped member 31 matches the width direction of the wheelchair.
a is reinforced. The back pipe 1 shown in FIG.
a is manufactured by welding. That is, two grooves extending in the longitudinal direction of the pipe a are provided at positions facing each other on the inner surface of the pipe 1a, and after passing the plate-like member 31 into the grooves, a welding rod is further inserted and inserted. Melted plate member 31
Is fixed to the pipe 1a.

FIG. 12 is a sectional view showing the structure of a second embodiment of the back pipe for a wheelchair according to the fourth invention of the present application. As shown in FIG. 11, in the second embodiment, the back pipe 1a
A member 33 extending in three directions at an interval of 120 ° from the center is extended along the length direction of the pipe 1a3 in the inner cavity of the pipe 1a3. With this configuration, the strength of the back pipe 1a is reinforced. In this case, since the pipe 1a is reinforced on average in almost all directions, it is not necessary to particularly care about the mounting direction of the back pipe 1a when assembling the wheelchair. The pipe shown in FIG. 11 is manufactured using a drawing table.

The back pipe used in the wheelchair according to the fourth invention of the present application can be applied to any type of wheelchair. That is, the present invention can be applied to all wheelchairs having a back frame made of a pipe material, such as a folding type, a fixed type, and a sports type.

[0054]

As described in detail above, the first aspect of the present invention is as follows.
In the wheelchair of the present invention, since the backrest seat and the hiprest seat are configured to be detachable from the main body frame, only the seat can be removed and washed, and the entire seat can always be kept clean. it can.
In addition, wheelchair wheels, frames,
There is no need to worry about rusting metal parts such as brake devices. In addition, since the backrest portion, the seat portion, the cover, and the belt-like member constituting each seat are provided with the hook-and-loop fastener on almost the entire surface, the mounting position of each member can be freely adjusted in front, rear, left, and right. The tension of each seat can be adjusted according to the user's preference and physical condition. Further, even when the sheet is damaged or the like, it can be easily replaced with a new sheet.

In the wheelchair according to the second invention of the present application,
The belt member is hung over the hiprest seat of the seat, and both ends of the belt member are turned downward from the outside of the upper horizontal member of the cross frame of the wheelchair to be fixed to the back of the hiprest seat. By pulling the belt member upward when folding the wheelchair, the wheelchair can be easily folded, and the usability of the user can be greatly improved. In particular, when a user changes from a wheelchair to a car, the user can sit down on the seat of the car and pull up the belt member to easily fold the wheelchair, thereby solving the conventional inconvenience. . In addition, when folding, the members can be folded without touching the driving wheel and the hand rim, so that these members are not damaged. Furthermore, since the operation of pushing the wheelchair from both sides is unnecessary, it is possible to prevent the occurrence of an accident such as the user holding the hand in the frame.

Further, in the wheelchair according to the third aspect of the present invention, since the protection member is attached to the horizontal member constituting the cross frame, the horizontal members are mutually folded when the wheelchair is folded, or the frame constituting the horizontal member and the wheelchair body. The impact of the collision can be reduced, and the damage to the horizontal member and other members constituting the main body frame can be greatly reduced. Further, when the cross frame is opened, it is possible to reduce the damage to the members constituting the horizontal member and the main body frame, which are caused by the weight of the user, the vibration when moving the wheelchair, and the like. Therefore, the wheelchair is less likely to be damaged,
The generation of rust and the like is suppressed, and the life of the wheelchair can be kept long.

Further, in the wheelchair according to the fourth aspect of the present invention, since the reinforcing member is provided inside the back pipe constituting the main body frame, the wheelchair is generated by the force applied when the user sits down on the seat. The deformation of the back pipe can be prevented. Therefore, the durability of the wheelchair is improved, and the wheelchair can be comfortably used for a long period without impairing the usability and performance of the wheelchair.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the entire configuration of a general wheelchair.

FIG. 2 is a development view showing a configuration of a backrest seat used in the wheelchair according to the first invention of the present application.

FIG. 3 is a view showing a state in which a belt-shaped member of the backrest seat shown in FIG. 2 is mounted.

FIG. 4 is a development view showing a configuration of a hiprest seat used in the wheelchair according to the first invention of the present application.

FIG. 5 is a view showing a wearing state of a belt-shaped member of the wheelchair seat shown in FIG. 4;

FIG. 6 is an enlarged view showing a part of the cross member shown in FIG. 5;

FIG. 7 is a diagram showing an entire configuration of a wheelchair according to the second invention of the present application.

FIG. 8 is a view showing a configuration of a folding belt used for a wheelchair according to the second invention of the present application.

FIG. 9 is a view showing a method of attaching a folding belt used for a wheelchair according to the second invention of the present application.

FIG. 10 is a diagram showing a partial configuration of a cross frame used for a wheelchair according to the third invention of the present application.

FIG. 11 is a sectional view showing the configuration of a first embodiment of a back pipe used for a wheelchair according to the fourth invention of the present application.

FIG. 12 is a view showing the configuration of a back pipe of a wheelchair according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body frame 1a Back pipe 1b Front pipe 2 Drive wheel 4 Cross member 4b Upper horizontal pipe 4d Guide member 10 Backrest seat 12 Hiprest seat 11, 13 Surface fastener 15 Hole 16 Protective member 20 Folding belt 21 Fastener members 31, 33 Reinforcement member

Claims (2)

(57) [Claims] 1. A cross frame comprising two left and right upper horizontal members, two left and right lower horizontal members, and a cross member connecting these horizontal members is provided below the seat portion.
The upper horizontal member is connected to a horizontal frame of a wheelchair main body, and in a wheelchair configured to be foldable in a width direction, a seat member that forms the seat portion in the width direction of the wheelchair above the seat portion. Separately spans a belt-like member narrower than the sheet member, and both ends of the belt-like member pass through the outside of an upper horizontal member constituting the cross frame and are fixed to a lower side of the seat portion. A foldable wheelchair, characterized in that: 2. The wheelchair according to claim 1 , wherein a protection member is provided on an outer periphery of the upper horizontal member.