JP3125178U - A human-powered wheelchair for care. - Google Patents

Abstract

[PROBLEMS] A wheelchair that can be driven manually without relying on electricity, and solves the problem of hygiene caused by touching the wheel directly with the hand, and further, the clothes (cuffs) inside the elbow are in contact. Provide human-powered wheelchairs for nursing care.
The rotational driving force of a rotating manual handle 22 installed in the front range of the waist from the waist of the operator who is a caregiver in front of the nursing wheelchair body is transmitted to the front wheel 3. Of course, the wheel 4 can be driven manually without relying on a coaxial small-diameter operation wheel.
[Selection] Figure 1

Description

The present invention relates to a wheelchair for care that is operated by a caregiver without relying on power supply power.

Conventionally, as a nursing wheelchair by human power without relying on this kind of power source, there is one in which the left and right rear wheels of the nursing wheelchair are directly rotated with both hands.
However, this kind of thing is unsanitary because the dirt on the wheel directly touches the hand.
Of course, there is a small operation wheel provided coaxially with the rear wheel for traveling, with the above in mind, but this is not very satisfactory. That is, since the traveling wheel has a large diameter, the clothes (cuffs) inside the elbow are in contact with each other.

The present invention allows the vehicle to be manually driven without relying on the small-diameter operation wheel of the coaxial as well as the rear wheel for traveling.

In order to solve the above problems, the present invention is configured so that the rotational driving force of the rotating manual handle installed in the front range of the shoulder from the waist of the caregiver operator in front of the care wheelchair body is transmitted to the front wheels. In addition, not only the rear wheel but also the coaxial small-diameter operation wheel can be driven manually.

(1) According to the first aspect, the rotational driving force of the rotating manual handle is transmitted to the front wheel, so that the rear wheel and the coaxial small-diameter wheel are not touched. Extremely hygienic without touching.
(2) According to the third aspect, if the rotating manual handle rotates in the reverse direction with respect to the forward rotation, the rotating manual handle brake device immediately acts, and it falls into a panicking state especially on a downhill without accidentally backing. There is nothing and the wheelchair can be easily stopped.
(3) According to claim 4, the difference in the rotational speeds of the left and right front wheels due to the wraparound can be dealt with by the differential device, and the burden on the careless caregiver can be eliminated.
(4) According to claim 5, it is possible to cope with some unevenness of the running surface by the universal joint in which the left and right rear wheels independently move up and down on the left and right of the rear wheel shaft.
The human-powered wheelchair for care according to claim 1.

The present invention will be described below based on an embodiment. FIG. 1 is a perspective view showing a human-powered wheelchair for nursing care. A nursing wheelchair main body Z includes a chassis 1, a seat chair 2, left and right front and rear wheels 3, 4. It consists of and. In addition, the seat 2 has a gripping hand H that is pressed by a caregiver who is a healthy person.
Specifically, a support arm 1 a is provided at the front portion of the chassis 1, and a front wheel hollow bearing 6 that surrounds the front wheel shaft 5 is supported and fixed. A support arm 1b is provided at the rear portion of the chassis 1, and a rear wheel hollow bearing 8 that surrounds the rear wheel shaft 7 is supported and fixed. Further, the support legs 9 of the seat chair 2 stand upright from the rear wheel 7 and the chassis 1 respectively. Further, the front wheel hollow bearing 6 has a differential 10 corresponding to the difference in rotational speed between the left and right front wheels 3.
Thus, the chassis 1 is made of a metal plate, but of course may be a quadrilateral with a metal pipe.

This differential 10 connects a chain S wheel 11 to a gear box 12, bisects the front wheel shaft 5 within the gear box 12, and includes gears 13 and 14 on the respective split shafts 5a and 5b. Small gears 15 and 16 are interposed between the gears 13 and 14. Accordingly, the gearbox 12 rotates following the rotation of the lower wheel 11 of the chain S, and the boss 17 is rotatably inserted into the front wheel hollow bearing 6. The boss 19 of the spoke 18 of the front wheel 3 is fixed to the outer periphery of the gear box 12.
Thus, the respective split shafts 5a and 5b are axially supported by the frame 20 that is inclined upright at a constant angle on the left and right. The upright of the frame 20 is within the range from the waist of the operator who is a caregiver to the front of the shoulder, and is composed of an inner chamber 21 and a cover 20a as a box type. Rotating manual handles 22 are provided at the upper ends of the left and right upright frames 20, respectively. The common shaft 23 of the left / right rotating manual handle 22 is inserted through a hollow bearing 24. Further, the common shaft 23 is equipped with the upper foil 25 of the chain S.

Therefore, the operating force of the rotating manual handle 22 constitutes the transmission device X by the common shaft 2, the chain S, the lower wheel 11, and the front and rear wheels 3, 4 via the upper wheel 25.
Further, in the middle of the hollow bearing 24, there is a so-called brake device 26 in which a brake is applied to the front wheel by rotating the rotary manual handle 22 in reverse with respect to the forward rotation. Specifically, as shown in FIGS. 4 and 5, the common shaft 23 is inserted into the shaft hole 28 of the outer cylindrical body 27, and a plurality of slits 29 that are wide in the rotational direction Y are formed on the inner periphery thereof. If the rods 30 are parallel to the outer periphery of the common shaft 23 and the rotation direction Y is advanced as shown in FIG. 5, the common shaft 23 and the rod 30 are mutually connected by a wide portion 29a of the slit 29. Rotates without resistance. When rotating in the opposite direction to the rotational direction Y, the common shaft 23 acts so that the rod 30 moves to the narrow portion 29b of the slit 29, and the frictional resistance of both the members 23 and 29 is increased. Is prevented from rotating. That is, the wheelchair is braked.

Universal joints 31 are provided on the left and right of the rear wheel shaft 7. Specifically, as shown in FIGS. 3 and 6, one U-shaped joint 32 is provided at the left and right ends of the rear wheel shaft 7, and the other U-shaped joint 34 is inserted and fixed to the boss 33 of the spoke 18 of the rear wheel 4. Both 32 and 34 are connected by a flexible element 35 and cross pins 36 and 37. Thereby, the rear wheel 4 can cope with some unevenness of the running surface.
Of course, this universal joint 31 may also be provided on the front wheel 3 side.

Next, the operation and use of the power wheelchair for nursing care according to the present invention will be described. First, an operator who is a caregiver sits on the sitting chair 2 and rotates the manual handle 22 to rotate the upper wheel 25.
Is transmitted to the lower wheel 11 through the chain S, and the left and right front wheels 3 rotate forward.
Of course, when the vehicle is curved left or right, it can be smoothly performed by the differential device 10.
When the wheelchair is stopped, the brake device 26 immediately applies the brake if the manual handle 22 is rotated in the direction opposite to the forward rotation.
Similarly, since the universal joint 31 is equipped on the rear wheel 4 side, it can cope with some unevenness on the running surface.

The perspective view which shows this invention human power wheelchair for care Expanded cross section on the front wheel side Expanded cross section on the rear wheel side Expanded cross section on the band side Expanded sectional view of the brake device Exploded perspective view of universal joint

Explanation of symbols

Z nursing wheelchair body X transmission device 3 front wheel 4 rear wheel 10 differential device 22 rotating manual handle 26 brake device 31 universal joint

Claims (5)

A wheelchair body for care, a pair of left and right front wheels and rear wheels mounted on the front and rear of the main body, and in front of the main body from the waist of the operator who is a caregiver to the front of the shoulder A human-powered nursing wheelchair characterized by comprising a rotating manual handle and a transmission device for transmitting this rotational driving force to the front wheels. 2. The care-powered wheelchair according to claim 1, wherein the transmission device comprises a chain, a rotating manual handle, and a front wheel. The nursing manual wheelchair according to claim 1, wherein the rotating manual handle is provided with a brake device in which a brake is applied to a front wheel by rotating in a reverse direction with respect to rotation in a forward direction. 4. The rotating manual handle includes a differential device that rotates only in the forward direction and that corresponds to a difference in rotational speed between the left and right front wheels caused by the turning in the left and right direction. A human-powered wheelchair for care. The human-powered wheelchair for nursing according to claim 1, further comprising a universal joint on the left and right of the rear wheel shaft, the left and right rear wheels independently moving up and down.

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