JPH09224977A - Handrail of wheelchair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wheelchair handrail that allows a person sitting on a wheelchair to remain in a stable and comfortable position. SOLUTION: This handrail 4 is vertically turnably mounted on a handrail shaft 3 mounted crosswise in an appropriate position of the backrest 2 of a wheelchair 1. The handrail 4 is secured to the handrail shaft 3, the backrest 2 is provided with a lock 14 that locks or permits turn of the handrail shaft 3, and the handrail 4 is shifted to an appropriate position by locking or unlocking the lock 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handrail of a wheelchair used for moving or bathing a physically handicapped person, an elderly person, etc. (hereinafter referred to as a patient).

[0002]

2. Description of the Related Art Japanese Patent Publication No. 62-55421 of the prior art discloses a moving vehicle for persons with disabilities, which is composed of a bogie, a supporting frame, a pedestal, a backrest, left and right armrests, and a pipe supporting frame. It is shown.

[0003]

In the above-mentioned conventional device, the back support part and the left and right armrests are not interlocked with each other, and when the back support part is tilted backward, the patient who is in the supine posture has the right and left armrests on which the upper limbs should be placed. This is inconvenient because there is no place to place the upper limb in a stable manner because it is separated from the upper limb.

An object of the present invention is to solve the above problems and to provide a handrail for a wheelchair in which a patient on the wheelchair can stably and comfortably.

[0005]

That is, according to the present invention, a handrail shaft (3) is laterally attached to an appropriate position of a backrest (2) of a wheelchair (1), and a handrail (3) is attached to the shaft (3). 4) A handrail of a wheelchair characterized in that the handrail is attached so as to be vertically rotatable. The handrail (4) and the handrail shaft (3) are fixed to each other, and a lock tool (14) for preventing or freely rotating the handrail shaft (3) is provided on the backrest (2). The handrail (4) is changed to an appropriate position by the operation of blocking or releasing the tool (14). Alternatively, the backrest (2) is rotatably supported by the seat portion (6) by the backrest shaft (8), and from the rear end shaft (20) provided behind the shaft support portion (4a) of the handrail (4), A connecting tool (22) is installed over a rear shaft (21) provided behind the backrest shaft (8) in the seat portion (6), and the handrail (4) and the backrest (2) are provided.
And the four sides of the seat frame (7) and the connector (22), the handrail shaft (3), the rear end shaft (20), the backrest shaft (8), and the rear shaft (2).
The four-bar linkage (23) is composed of the four axes with 1),
When the backrest (2) is tilted backward, the four-bar linkage (23) is actuated, and the handrail (4) is rotated in the direction of the seat portion (6) with the operation of the tilting backward.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION When the present invention is used, a patient is placed on a wheelchair 1, moved, or the seat portion 6 of the wheelchair 1 is separated and a bath with the seat portion 6 is taken. The backrest 2 of the wheelchair 1 supports the back of the patient. The handrail 4 supported by the handrail shaft 3 of the backrest 2 rotates in the vertical direction.

The handrail shaft 3 is fixed to the handrail 4,
When the handrail 4 rotates, the handrail shaft 3 also rotates. Backrest 2
The lock tool 14 provided in the block prevents the rotation of the handrail shaft 3 or releases the block freely.

The handrail 4 is changed and set to an appropriate position by the rotation blocking action of the lock tool 14 or the release of the blocking action. Also, a four-bar linkage mechanism 23 including four sides of the handrail 4, the backrest 2, the seat frame 7, and the connecting tool 22, the shaft support portion 4a, the rear end shaft 20, the backrest shaft 8, and the rear shaft 21. When the backrest 2 is tilted rearward to be in a reclining posture, the handrail 4 is automatically rotated and fixed in the direction of the seat portion 6 in accordance with the movement of the backrest 2.

[0009]

In the embodiment of the present invention, a handrail shaft 3 is attached laterally at an appropriate position on a backrest 2 of a wheelchair 1, and a handrail 4 is attached to the handrail shaft 3 so as to be vertically rotatable. To be In the wheelchair 1, a seat 6 is separably mounted on a carriage 5, and a backrest 2 supports a seat frame 7 that supports the seat 6.
Is rotatably supported by a backrest shaft 8 and attached upward.

The reclining mechanism 9 includes a grip lever 35 provided on the back of the backrest 2, a connecting rod 10 connected to the grip lever 35, a claw member 11 rotated by the connecting rod 10, and a seat frame. 7 and a step groove body 13 having a plurality of grooves 12 attached to the first groove 12a of the step groove body 13.
The lower end of the claw member 11 is fitted in. At the time of reclining, the grip lever 35 is gripped, the connecting rod 10 is pulled up, and the claw member 11 is removed from the first groove 12a and changed to the second groove 12b. By this operation, the standing angle of the backrest 2 is changed.

In the first embodiment, the handrail 4 is manually rotated and fixed, and the handrail 4 and the handrail shaft 3 are fixed to each other, and the rotation of the shaft 3 is blocked or released. The backrest 2 is provided with a lock tool 14 which is rotatable. The locking tool 14 includes a plurality of recesses 15 formed in the handrail shaft 3.
A pin 16 that fits into the pin 16, a handle 17 attached to the pin 16, and a spring 18 that presses the pin 16 into the recess 15.
And a casing 19 attached to the backrest 2.
The lock member 14 serves to prevent the handrail shaft 3 from rotating or to release the blocking function.

The handrail shaft 3 is supported by the backrest 2 and integrally connects the left and right handrails 4, and the left and right handrails 4 are prevented by the blocking action of the locking tool 14 or the release of the blocking action.
Are simultaneously and integrally changed to appropriate positions.
In another embodiment of the handrail 4, although not shown, the left and right handrails 4 and the handrail shaft 3 are not integrally connected, but the left and right handrails 4 rotate separately. To do.

In the second embodiment, a connecting member 22 is installed from a rear end shaft 20 provided rearward of the shaft supporting portion 4a of the handrail 4 to a rear shaft 21 rearward of the backrest shaft 8.

The four-joint link mechanism 23 includes four sides of the handrail 4, the backrest 2, the seat frame 7, and the connecting tool 22, the handrail shaft 3, the rear end shaft 20, the backrest shaft 8, and the rear shaft 21. It is composed of four axes. The four-bar linkage 23 includes a handrail shaft 3 and a rear end shaft 2.
Since the distance between the backrest shaft 8 and the rear shaft 21 is slightly shorter than the distance of 0, when the backrest 2 is tilted rearward, the handrail 4 automatically moves toward the seat portion 6 in association with this tilting. It rotates. The angle adjusting tool 41 changes and adjusts the position of the rear end shaft 20 on the handrail 4, and the wheelchair 1
If the distance between the handrail shaft 3 and the rear end shaft 20 is increased during the reclining of the handrail 4, the handrail 4 is in an upright posture, and the handrail shaft 3
When the distance between the handrail 4 and the rear end shaft 20 is shortened, the handrail 4 is in a lying posture.

In the third embodiment, the connector 22 in the four-bar linkage 23 of the second embodiment is replaced with a slot connector 25. That is, in the long hole connector 25, the long hole link mechanism 26 is formed by using the shaft hole for the rear shaft 21 opened at the bottom as the long hole 24. A hook hole portion 24a is formed at the lower end of the long hole 24,
When the handrail 4 is rotated upward when the patient gets on and off the wheelchair 1, the rear shaft 21 is removed from the hook hole 24a.

In FIG. 1, 27 is a lower leg support for receiving the lower leg of the patient, 28 is a footrest for receiving the foot of the patient, 29 is a foot raising handle for manually lifting and rotating the lower leg support,
Reference numeral 30 is a thrust link that pierces the lower leg support, 31 is a connecting link that couples the foot raising handle 29 and the thrust link 30, and 32 is a roller that movably supports the seat portion 6 separated from the carriage portion 5.

Further, in FIG. 1, reference numeral 33 is a trolley portion 5 and a seat portion 6.
Front and rear support members 33 that are provided between the seats and support the seat portion 6.
a. 33b and 34 are hooks for hooking the seat portion 6 placed on the trolley portion 5, 36 is a moving handle that is gripped when the wheelchair 1 is moved, 39 is a caster, and 40 is a block for the forward movement of the wheelchair 1. A stopper, 37 in FIG. 3 is a slide lock tool, and 38 in FIG. 4 is an intermediate shaft provided in the middle of the connecting tool 22 for bending the connecting tool 22 in the middle.

In using the first embodiment, the patient is in a wheelchair 1
When you put it on the floor, pull the handle 17 backwards and
The lock action of 4 is released, the handrail shaft 3 is made rotatable, and the handrail 4 is rotated upward. Next, wheelchair 1
Then, the handrail 4 is lowered to the normal front protruding position, and the pin 16 is fitted into the concave portion 15 of the handrail shaft 3 by the force of the spring 18 and fixed.

When the wheelchair 1 is in the reclining position, the grip lever 35 is gripped to pull up the connecting rod 10, the claw member 11 is pulled out from the groove 12, and the backrest 4 is tilted backward by the moving handle 36. After tilting the backrest 2 backward, when rotating the handrail 4 in the downward direction, that is, toward the seat portion 6, the handle 17 is pulled to release the locking action of the handrail shaft 3 and the handrail 4 is moved to the seat portion. After rotating in six directions, the handlebar 17 is released and the handrail shaft 3 is locked in a state in which it cannot be rotated.

When using the second embodiment, the patient is in a wheelchair 1
When it is mounted on the rail, the slide lock tool 37 is shifted upward, the intermediate shaft 38 is pulled backward, the coupling tool 22 is bent, and at the same time, the handrail 4 is rotated upward about the handrail shaft 3. .

Next, the patient is placed on the wheelchair 1 and the handrail 4 is lowered to the normal front protruding position. At the same time when the handrail 4 is lowered, the connecting tool 22 is pulled to be in a linear state, and the slide lock tool 37 on the connecting tool 22 is lowered to lower the intermediate shaft 38.
Then, the intermediate shaft 38 is fixed in a state in which it cannot be bent, and the handrail 4 is fixed so as not to rotate.

When the wheelchair 1 is in the reclining posture, as in the first embodiment, the grip lever 35 is gripped, the connecting rod 10 is pulled up, the claw member 11 is pulled out from the groove 12, and the backrest 2 is held by the moving handle 36. Move it backwards. With this rearward tilting operation, the four-bar linkage 23 operates to rotate the handrail 4 toward the seat portion 6. As a result, when the backrest 2 is in the rearward tilted state, the handrail 4 standing upward from the handrail shaft 3 reaches the position inclined toward the seat portion 6 and is fixed.

[0023]

According to the first aspect of the present invention, since the handrail 4 is attached to the handrail shaft 3 attached to the wheelchair 1 so as to be vertically rotatable, the patient can get on and off the wheelchair 1. The handrail 4 can be rotated upward or downward to change to a suitable position when the wheelchair 1 is changed to a reclining posture. Therefore, the patient can comfortably and safely ride the wheelchair 1 and can use it conveniently.

The handrail 4 according to the invention of claim 2 is
With a simple operation of the lock tool 14, it is possible to prevent or release the upward / downward rotation, and the handrail 4 can be easily changed to a suitable position, which is convenient.

According to the third aspect of the present invention, since the handrail 4 is supported by the seat portion 6 by the four-bar linkage mechanism 23, when the backrest 2 is tilted backward, the handrail 4 is seated as the backrest 2 is tilted. Rotate in the direction of section 6. Therefore, the patient is in the supine position and the handrail 4
When holding the handrail 4, the handrail 4 can be easily grasped by extending the upper limb obliquely upward without pushing the upper limb vertically upward, which reduces fatigue and is convenient.

[Brief description of drawings]

FIG. 1 is a right side view of a first embodiment of the present invention.

FIG. 2 is a right side cross-sectional view showing the lock according to the first embodiment of the present invention.

FIG. 3 is a right side view of the second embodiment of the present invention.

FIG. 4 is a partial right side view of a handrail according to a second embodiment of the present invention, which is rotated upward.

FIG. 5 is a right side view in which the backrest in the second embodiment of the present invention is tilted backward.

FIG. 6 is a partial perspective view of an elongated hole link mechanism according to a third embodiment of the present invention.

[Description of sign]

 1 Wheelchair 2 Backrest 3 Handrail Shaft 4 Handrail 4a Shaft Support 6 Seat 7 Seat Frame 8 Backrest Shaft 14 Locking Tool 20 Rear End Shaft 21 Rear Shaft 22 Connecting Tool 23 Four Bar Linkage

Claims (3)

[Claims] 1. A handrail shaft (3) is attached laterally at an appropriate position on a backrest (2) of a wheelchair (1), and the handrail (4) is vertically rotatable on the shaft (3). Handrails for wheelchairs characterized by being attached to. 2. The handrail (4) and the handrail shaft (3) are fixed to each other, and the backrest (2) is provided with a lock (14) for preventing or freely rotating the handrail shaft (3). The handrail according to claim 1, wherein the handrail (4) is changed to an appropriate position by blocking or releasing the lock (14). 3. The backrest (2) is pivotally supported on the seat (6) by a backrest shaft (8), and the pivot support (4) in the handrail (4).
The connecting tool (22) is installed from the rear end shaft (20) provided rearward of the a) to the rear shaft (21) provided rearward of the backrest shaft (8) of the seat portion (6). Four sides of a railing (4), a backrest (2), a seat frame (7) and a connecting tool (22), a handrail shaft (3) and a rear end shaft (20).
And the backrest shaft (8) and the rear axle (21), the four-bar linkage (23) is configured. When the backrest (2) is tilted backward, the four-bar linkage (23) operates. The handrail according to claim 1, wherein the handrail (4) rotates in the direction of the seat portion (6) in association with the backward movement.