JPH05305112A - Reclining type wheel chair - Google Patents

Abstract

PURPOSE:To provide a folding reclining type wheel chair which has a seat with an angle of a back rest adjustable. CONSTITUTION:A back rest part of a wheel chair so arranged that the main body of the chair is folded longitudinally is supported by means of a gas cylinder 6 with the angle thereof adjustable. Rear wheels 10 are mounted on a pantograph type expandable connecting rod 7 mounted on a rear pipe 3 so as to let the rear wheels 10 move longitudinally in linkage with the tilting of the back rest part. A rail 8 has the part of a seat removable. Thus, the angle of the back rest can be adjusted riding on the wheel chair. Higher stability is achieved as the rear wheels move longitudinally in linkage with the tilting of the back rest. This wheel chair can be used in a bed type by leveling the back rest part to the last end.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foldable wheelchair suitable for physically handicapped persons and elderly persons. In particular, in addition to the foldable wheelchair, a reclining type chair in which the backrest can be tilted backward and fixed at an arbitrary angle Regarding wheelchairs.

[0002]

2. Description of the Related Art As a folding wheelchair, a vehicle body is composed of a seat member constituting a seat surface, a back support member constituting a backrest portion, a rear pipe with a rear wheel and a front pipe with a front wheel. It has a structure that can be folded in the width direction or the front-back direction, or in the width direction and the front-back direction. In this type of wheelchair, a caregiver generally holds and pushes a handle attached to a backrest.

[0003]

In each of the conventional folding wheelchairs, the front wheel and the rear wheel are located under the seat surface, and the backrest is fixed and not reclining. I can't put my body up to a comfortable posture. In other words, the conventional wheelchair has a structure in which it is not possible to change the posture while sitting at a right angle to the seat, so it may make the user feel tired or have back pain when sitting for a long time. There is a problem such as becoming. In addition, since the handrails attached to the left and right of the conventional type are fixed, it is not possible to get on and off from the side, and there is the inconvenience of having to always get on and off from the front.

According to the present invention, the rear wheel of the foldable wheelchair can be moved back and forth so that the backrest can be reclined and the wheelchair can be used as a bed to increase the function as a wheelchair and the handrail can be moved. The purpose is to provide a reclining wheelchair that allows passengers to get on and off from the side.

[0005]

A reclining type wheelchair according to the present invention allows a backrest portion to be tilted rearward, and the rear wheel is moved forward and backward in conjunction with tilting of the backrest portion, and a step portion is also provided. The main feature is that the mechanism is almost horizontal. That is, according to the present invention, a pair of left and right vertical pipes are pivotally attached to lower end portions of both ends of a backrest pipe with a handle, and a seat pipe constituting a seating surface is pivotally attached to the pivotal attachment portion. A rear pipe having a rear wheel support portion horizontally projecting rearward from below the vertical pipe and a front pipe having front wheels with casters are pivotally attached to form a vehicle body, and a step pipe and a back support pipe pivotally attached to the tip of the seat pipe. The step pipe is linked to the rotation of the back support pipe through the connecting pipe provided between the back support pipe and the vertical pipe, and the reclining gas cylinder is installed vertically. A panter with a structure that supports the back support pipe, and a guide frame that is attached to the rear wheel support of the rear pipe so that it can be opened and closed in the front-rear direction. The rear wheel is attached to the rough expansion and contraction connecting rod, and the pantograph-type expansion and contraction connecting rod is interlocked with the rotation of the back support pipe through the connecting pipe provided between this expansion and contraction connecting rod and the back support pipe. What it does and how it works
A rotary lock mechanism for the chair body is provided between the vertical pipe and the rear pipe, and one end is supported by a removable support pipe pivotally attached to the backrest pipe and the other end provided between the seat pipe and the seat pipe. Having movable handrails,
It has a detachable head pad on the top of the backrest pipe, and the mechanism allows the step to tilt in conjunction with the rotation of the backrest pipe through a connecting pipe provided between the seat pipe and the step. The main point is that the footrest seat attached to the step pipe is divided into two parts on the left and right sides so that it can be opened.

[0006]

When the reclining wheelchair / chair body of the present invention is opened, the open state of the legs is maintained by the rotary lock mechanism. In addition, when the backrest pipe is set up almost vertically, the backrest portion contracts the pantograph-type telescopic connecting rod to move the rear wheel toward the vehicle body, and the reclining gas cylinder keeps the state. The reclining method is to operate the lever attached to the gas cylinder to fix the backrest at an arbitrary angle. The rear wheel moves rearward by the expansion of the pantograph-shaped telescopic connecting rod in conjunction with the tilting movement of the backrest, so that the center of gravity moves rearward and becomes stable, and the step pipe also rotates upward together. When the backrest is tilted to the end, the step rotates downward and faces the same direction as the step pipe to form a complete bed type. Further, at this time, the rear wheel moves rearward of the maximum stroke, so that the stability is good. In addition, since the footrest portion is of the double-open type, the footrest portion does not have to be an obstacle when a person is hugging and put on and off.

When folding the wheelchair, the main body can be folded back and forth by releasing the rotary lock mechanism. As the rotary lock mechanism, for example, a bending arm having one end pivotally attached to the connecting rod provided between the vertical pipe connected to the lower end of the back support pipe and the rear pipe and the other end pivotally attached to the rear pipe is stretched. It is possible to use a mechanism in which the chair body is locked in the open leg state and the lock is released by bending the arm so that the chair body is folded back and forth.

Since the handrails provided on both sides of the seat can be kept upright along the backrest pipe by separating the handrail support pipes from the seat pipe, the handrails can be ridden from the side. As means for attaching and detaching the handrail support pipe, for example, a protrusion is provided on the seat pipe side, and an L-shaped stopper pivotally attached to the support pipe in a state where the support pipe is fitted to the protrusion is positioned directly below the protrusion. A method in which the lock is released by rotating the L-shaped stopper in the lateral direction can be adopted.

[0009]

1 to 6 exemplify the structure of a reclining wheelchair according to the present invention. FIG. 1 is a perspective view showing the entire structure of the wheelchair with its legs open, and FIG. 2 is a side view of the same wheelchair. FIG. 3 is a rear view of the same wheelchair, FIG. 4 is a perspective view showing a handrail portion of the same wheelchair, FIG. 5 is a side view showing a state in which the backrest of the same wheelchair is tilted to the lower limit position, and FIG. 6 is the same wheelchair. A side view showing the state in the middle of folding,
FIG. 7 is a perspective view showing a use state in which a seat is attached to the wheelchair, and FIG. 8 is a perspective view showing a state in which the wheelchair with a seat is also used as a bed type, and 1 is a back with a handle constituting a backrest portion. Abutting pipe, 2 is a seat pipe constituting a seating surface, 3 is a rear pipe with movable rear wheels, 4 is a front pipe with front wheels, 5 is a vertical pipe, 6
Is a gas cylinder, 7 is a pantograph-shaped telescopic connecting rod, 8
Is a handrail, 9 is a step pipe, 10 is a rear wheel, and 11 is a front wheel.

That is, in the wheelchair according to the present invention, a vertical pipe 5 having an appropriate length is provided below the pair of left and right backrest pipes 1.
While pivotally connecting the shaft pins 12 to each other,
A gas cylinder 6 vertically installed between the vertical pipe 5 and the backrest pipe 1 is configured to be reclined, and one end of the left and right seat pipes 2 is attached to the upper end of the vertical pipe 5 via a bracket 13. The seat pin 2 is rotatably pivoted by a shaft pin 14, and the upper ends of the movable rear pipe 3 with rear wheels and the front pipe 4 with front wheels are rotated by a shaft pin 16 through a bracket 15 at a substantially middle portion of the seat pipe 2. The main body is composed of a connection support pipe 18 which is rotatably pivotally attached, one end of which is attached to the vertical pipe 5 and the other end of which is pivotally attached to the front pipe 4 by pivot pins 17, respectively.

The rear pipe 3 has a rear wheel support portion 3-1 whose lower end portion horizontally projects rearward from below the vertical pipe 5 in order to make the rear wheel movable, and a guide frame 19 attached to this portion has a rear wheel support portion 3-1. One of the pantograph type expansion and contraction connecting rods 7 is fixed to the root portion of the guide frame 19, and the other is fixed to the guide frame 19 by a frame 19-.
A rear wheel 10 is pivotally supported on the same axle 20 as the top of the movable end of the connecting rod. Then, the pantograph-shaped telescopic connecting rod 7 is attached to the back support pipe 1
One end of the back support pipe 1 and the other end of the expansion and contraction connecting rod 7 are connected to the pin 22 and the connecting pipe 21, respectively.
Back support pipe 1 with a connecting rod 24 that is pivotally pivoted at
When the back support pipe 1 is raised, the expansion support rod 7 contracts and the rear wheel 10 moves to the main body side. Conversely, when the back support pipe 1 is tilted, the expansion support rod 7 extends and the rear wheel extends. 1
0 is configured to move backward. The reclining gas cylinder 6 is mounted on the mounting member 25 having the upper portion horizontally provided on the backrest pipe 1 via the bracket 25-1,
Further, the lower end is attached to a mounting member 27 provided horizontally on the vertical pipe 5 via a bracket 27-1. The reclining gas cylinder 6 is designed so that when the lever 28 attached to the bracket 25-1 is pulled up, the backrest pipe (backrest) 1 falls down, and when the lever is released, the backrest pipe automatically stops. You can recline to any angle. The handle 1-1 is the back support pipe 1.
In addition to being rotatably attached, it can be fixed at an arbitrary position with a tightening screw 1-2.

The step pipe 9 is rotatably attached to the front end of the seat pipe 2 with a shaft pin 29 as a fulcrum, and one end of the step pipe 9 is rotatably pivotally attached to the lower portion of the backrest pipe 1. It is adapted to rotate up and down in conjunction with the rotation of the back support pipe 1. That is, the back pipe 1
It is mounted so that when it stands up, it descends downward, and when it falls down, it is pushed forward and becomes horizontal. Further, the step 9-1 attached to the step pipe 9 is attached to a U-shaped pipe 9-3 pivotally attached to the lower end of the step pipe 9 by a shaft pin 9-2. Then, one end is pivotally attached to the bracket 9-10 attached to the pipe 9-9 laterally provided on the seat pipe 2 by the shaft pin 9-4 and the other end is the L-shaped pipe 9-.
It is configured to interlock with the rotation of the back support pipe 1 via a connecting rod 9-5 connected to the backrest pipe 3. That is, the back support pipe 1
Step 9-1 is configured to face in the same direction as the step pipe 9 when it is pushed to the end. Further, a foot resting seat member 9-7 having a left-right two-divided structure is attached to a supporting pipe 9-6 at a U-shaped metal fitting 9-8 at the step pipe portion.
It is a double-opening type that is slidably attached to the left and right via.

The lock mechanism of the chair body comprises a connecting rod 31 pivotally mounted between the vertical pipe 5 and the rear pipe 3 and two members rotatably connected by a connecting pin P ₁ and one end of which is connected to the connecting rod. It consists of a bending arm 34 which is connected to the rod by a connecting pin P ₂ and the other end of which is pivotally attached to the rear pipe 3 by a fulcrum pin P _3, and when the chair body is opened, the bending arm 34 is stretched to change its state. The mechanism is such that, when the arm is locked and the end of the bendable arm is stepped on, the arm bends around the fulcrum pins P ₂ and P ₃ as fulcrums to release the lock. Of course, such a lock mechanism is an example.

The handrail 8 has one end of the handrail pipe 8-1 pivotally attached to the back support pipe 1 by a pivot pin 22, and the bracket 35 attached to the other end pivotally attaches an upper end thereof by an pivot pin 36. The lower end of the L-shaped stopper 40 is attached to the seat pipe 2 so as to be supported by a support pipe 38 that is detachably fitted to a joint projection 37 pivotally attached to the seat pipe 2 and is pivotally attached to the lower portion of the support pipe. Is positioned just below the joint protrusion 37, and is unlocked by laterally rotating the L-shaped stopper 40. Axis pin 36 when reclining,
By turning around 39 as a fulcrum, it is always horizontal.

A head pad 5 is provided above the back support pipe 1.
0 is mounted so that the height can be adjusted. The mounting structure is such that the pad support rod 54 is slidably fitted into the pad mounting member 52 provided in the central portion of the pad mounting frame 51 laterally provided on the back support pipe 1 with the tightening screw 53, and the tightening screw is attached. The height can be adjusted by 53.

The seat is composed of a seat 55 which is divided or integrated from the seat surface to the backrest part and a foot pipe seat 56 of the step pipe, and the foot seat 56 is a seat member having a left and right divided structure. Attach to 9-7 respectively. In this way, the fact that the footrest part is a double-opening type is
This is because, if the seat is a one-piece member, this footrest part becomes an obstacle when a person with a handicapped person or the like is hugging and is put down. Reference numeral 57 is a rotary stopper.

Although a braking device (brake) is omitted in the drawing, for example, a device which is mounted on the rear pipe 3 to manually brake the rear wheel, or a wire brake which is used in a bicycle is used. The rear wheel is braked by the steering wheel. This braking system would be more convenient if it could be used by both the person in the chair and the caregiver.

In the wheelchair having the above structure, when the backrest is tilted rearward with the legs open, the lever 28 of the reclining gas cylinder 6 is put on the chair.
When the lever is pulled up, the backrest part falls down with the shaft pin 12 as a fulcrum, so when the lever is released at an appropriate position, it is automatically fixed at that position. Since the rear wheel 10 moves rearward in conjunction with the tilting of the backrest, the center of gravity moves rearward and stabilizes.
At this time, the connecting pipe 30 is pushed forward as the backrest rotates, so that the step pipe 9 moves.
Since it rotates upward with 9 as a fulcrum, step 9-1 is also tilted according to the tilt of the backrest, and it is possible to sit in a comfortable posture. Also, when using a wheelchair as a bed type,
Again, the lever 28 of the reclining gas cylinder is pulled up and the backrest is tilted to the lower limit position. Rear wheel 1 at this time
Since 0 moves further backward and stops at a predetermined position, it is stable even if the body is tilted, the step pipe 9 goes up further, and the step 9-1 is extended straight through the connecting rod 9-5. So you can stretch your legs and lie down comfortably. In this case, the handlebar 1-1 is directed upward to facilitate pushing the wheelchair. Further, since the handrail 8 is rotated about the shaft pins 36 and 39 as a fulcrum and becomes substantially horizontal in conjunction with the movement of the backrest, it is easy to put the arm on. If the support pipe 38 of the handrail 8 is detached from the joining protrusion 37, the user can get on and off from the side.

Next, when the wheelchair is folded from the open state, the lock is released by stepping on the lower end of the bending arm 34 to bend the arm, so that the backrest and the seat surface are grasped and the front-back direction is held. Can be folded into At this time, the seat portion rotates about the shaft pin 14 as a fulcrum, and at the same time, the rear pipe 3 and the front pipe 4 both rotate about the shaft pin 16 as a fulcrum, and the front pipe 4 supports the shaft pin 16 through a connection support pipe 18 as a fulcrum. It turns to and is folded. At the same time, the step pipe 9 is also folded via the connecting pipe 30, the step 9-1 is also folded via the connecting rod 9-5, and the handrail 8 is also folded at the same time. Since the folded wheelchair becomes smaller as a whole and is self-supporting, the handlebar can be grasped and pushed and moved.

When the wheelchair in the folded state is to be opened and used, the rear pipe 3 is rotated rearward by grasping the backrest portion and the seat surface portion and opening them in the front-back direction.
The front pipe 4 rotates forward through the connection support pipe 18, and the step pipe 9 rotates forward through the connection pipe 30. Then, when the main body is completely opened, the bendable arm 34 is in a stretched state and the open leg state is locked. At this time, the handrail 8 becomes horizontal.

[0021]

Since the present invention is constructed as described above, it has the following effects. Since it has a reclining seat that allows you to adjust the angle of the backrest, you can lean on your body while sitting on the seat and ride in a comfortable position, and the rear wheels move backwards in conjunction with tilting of the backrest. Since it is a mechanism, it is stable even if the backrest is tilted at an arbitrary angle, and when the backrest is tilted to the end, the rear wheel moves further rearward so that it is not only stable, but the step collapses The wheelchair can be used as a bed type. Since the footrest part is of a double-opening type, it is convenient because the footrest part does not get in the way when the caregiver puts the person with a handicapped person on or off. Since the handrail is movable so that it can be removed from the seat part, you can get on and off not only from the front of the seat but also from the side. The body, steps and handrails are all folded back and forth with one-touch operation, and the mechanism is simple, so it is compact, easy to use, and convenient to carry and carry.

[Brief description of drawings]

FIG. 1 is a perspective view showing a structural example of a wheelchair according to the present invention in an open-leg state.

FIG. 2 is a side view of the same wheelchair.

FIG. 3 is a rear view of the above wheelchair.

FIG. 4 is a perspective view showing a handrail portion of the above wheelchair.

FIG. 5 is a side view showing a state in which the backrest of the above wheelchair is tilted to the lower limit position.

FIG. 6 is a side view showing a state in which the upper wheelchair is being folded.

FIG. 7 is a perspective view showing a use state in which a seat is attached to the above wheelchair.

FIG. 8 is a view showing a state where the same wheelchair is used as a bed type.

[Explanation of symbols]

 1 Back support pipe 2 Seat pipe 3 Rear pipe with rear wheel 4 Front pipe with front wheel 5 Vertical pipe 6 Gas cylinder 7 Pantograph type telescopic connecting rod 8 Handrail 9 Step pipe 10 Rear wheel 11 Front wheel

Claims (1)

[Claims] 1. A pair of left and right vertical pipes are pivotally attached to the lower ends of both ends of a backrest pipe with a handle that constitutes a backrest portion, and a seat pipe that constitutes a seat surface is pivotally attached to the pivotal attachment portion. A rear pipe having a rear wheel supporting portion whose lower end portion horizontally projects rearward from below the vertical pipe and a front pipe having a front wheel with casters are pivotally mounted to form a vehicle body, and are connected and supported between the vertical pipe and the front pipe. The pipe is installed horizontally, and the step pipe is tilted in conjunction with the rotation of the back support pipe through the connecting pipe provided between the step pipe pivotally attached to the tip of the seat pipe and the back support pipe. , The step is tilted in conjunction with the rotation of the back support pipe through a connecting pipe provided between the step pivotally attached to the step pipe and the seat pipe. There is no mechanism, and the footrest seat that is attached to the step pipe is divided into two parts, left and right, to be a double-open type, and the backrest pipe is supported by the reclining gas cylinder that is vertically installed between the backrest pipe and the vertical pipe. The pantograph type expansion and contraction connecting rod attached to the rear frame supporting portion of the rear pipe so as to be openable and closable in the front-rear direction has a rear wheel, and the connection provided between the extendable connecting rod and the back support pipe. The rear connecting wheel is moved back and forth in conjunction with the rotation of the backrest pipe through the pipe, and one end is pivotally attached to the backrest pipe and the other end is attached to and detached from the seat pipe. Having a movable handrail supported by a vertical support pipe, a detachable head pad on the top of the back support pipe, and a rotary lock mechanism of the main body between the vertical pipe and the rear pipe. Reclining wheelchair, characterized in that it includes.