JPH052174Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) This invention relates to a wheelchair auxiliary trolley that is used mainly when a wheelchair user ascends and descends stairs or escalators.

(Prior Art) Generally, a wheelchair user needs an attendant to help them use stairs or escalators.
It is difficult for the attendant to do so alone. For this reason, a wheelchair auxiliary trolley has recently been proposed that is equipped with a wheelchair and allows the wheelchair user to go up and down stairs and escalators with only one attendant. There has also been a proposal related to Japanese Patent Application No. 75,557/1989 in which the lock position of the auxiliary handle is changed so that the wheelchair can be transported without removing it. The structure and operation of the latter wheelchair auxiliary trolley will be explained with reference to the drawings in FIGS. 4 to 9. In FIGS. The crawler device 8 of 1 is a motor 3 mounted on a bogie frame 2.
A drive wheel 5 and a driven guide wheel 6 driven by this motor 3, and a drive wheel 5 that is hung between the guide wheel 6 and the drive wheel 5 and run along a guide (a frame that also serves as the bogie frame 2). It is composed of a pair of left and right endless bodies 7 that rotate forward and backward in a closed loop.

Reference numeral 9 denotes a pair of front wheels disposed on both sides of the front end of the truck body 1, 10 a rear wheel attached to a bracket 23b of an auxiliary handle 23, which will be described later, with a shaft 11a; The rear wheel 10 is attached to the front and rear ends of a swinging arm 12 that supports the central shaft 11 as a fulcrum, and the rear wheel 10 is attached to the front wheel swinging frame 1.
The auxiliary handle 23 is pivotally supported by the bracket portion 23b of the auxiliary handle 23 at a distance corresponding to 2.5 escalator steps from the central axis 11 of the auxiliary handle 23. The front and rear wheels 9, 10 are designed to touch the running surface with the left and right endless bodies 7 of the crawler device 8 slightly floating above the running surface when the vehicle runs on a flat surface.

A handle 13 is provided on the upper frame portion near the front end of the bogie frame 2 and stands diagonally forward, the base end of which is rotatably pivoted. Wheelchair fixing devices 14 and 15 are provided for fixing the wheelchair A in the state shown in FIGS. 8 and 9. 16 is a mounted wheelchair A so that a wheelchair user 70 can ride with confidence when going up and down stairs and escalators.
This hydraulic cylinder 16 is attached to the front end of the trolley frame 2, and its piston rod 16a is The handle 13 connected to the handle 13 and fixed to the wheelchair is rotated in the up/down direction.
The bogie underframe 2 is equipped with a hydraulic power unit 17 that drives the hydraulic cylinder 16, a battery 18 that serves as its power source, and a system that detects the inclination angle of the bogie underframe 2 and outputs an output corresponding to the inclination. An inclination angle sensor 19 and a handle position detector 2 that detects the rotational position of the handle 13 with respect to the truck frame 2.
0 is provided at the bottom of the tip side of the handle 13, and the hydraulic power unit 1 is operated by the output signals from the inclination angle sensor 19 and the handle position detector 20.
A controller 21 for driving and controlling 7 is attached. This controller 21 receives an output signal of a magnitude corresponding to the inclination of the truck body 1 outputted from the inclination angle sensor 19, and performs drive control for controlling the hydraulic power unit 17 by comparing it with a predetermined set value. The hydraulic cylinder 16 is operated by the drive of the hydraulic power unit 17 and the handle 13 is rotated.
The hydraulic power unit 17 is configured to include a control circuit for a stop control section that stops driving the hydraulic power unit 17 when the handle position detector 20 detects that the hydraulic power unit 17 has rotated to a predetermined position.

Reference numeral 23 indicates a frame fixing shaft 4 so that the rising angle of the rear frame portion 22 of the truck body 1 can be varied.
This is a rotatable auxiliary handle that is detachably attached to the handle mount 23a, and an elastic member 46 having a high coefficient of friction, such as rubber, is attached with a bolt 45 to the lower surface of the handle mount 23a. Reference numeral 50 denotes a locking mechanism that variably locks the auxiliary handle 23 in two stages so that the elastic member 46 protrudes below the rear end frame portion 22 of the truck main body and does not protrude. As shown in FIGS. 6 and 7, a receiver 41 is fixed to the rear end of the frame portion 22 and has claw engagement holes 41a and 41b at two upper and lower locations, and the upper and lower claw engagement holes 41 of this receiver 41
The auxiliary handle includes a lock pawl 43 biased by a spring 42 provided on the handle mount 23a so as to be able to selectively engage with the auxiliary handle 41a and 41b, and an operating lever 44 for releasing the lock pawl. 23 about the frame fixing shaft 40 as a fulcrum, the locking claw 43 engages the lower claw engaging hole 41b of the receiving plate 41.
When the auxiliary handle 23 is engaged as shown in FIG.
The lock claw 43 can be locked, and the lock claw 43 can be locked.
When the elastic member 46 is engaged with the upper pawl engaging hole 41a of No. 1 as shown in FIG. As shown in the figure, the state of rising and immersion)
The auxiliary handle 23 can be locked at any time. The height H of the elastic member 46 from the running surface 47 (the running surface when running on flat ground) in the protruding state as shown in FIG. 6 is the height from the running surface 47 to the lower surface of the endless body 7 of the crawler device. It is set to be approximately half the height of J.

Therefore, the wheelchair auxiliary trolley having the above-mentioned configuration,
When driving on level ground or using an escalator, the auxiliary handle 23 is locked in the state shown in FIG. 6 by operating the locking mechanism 50, and when going up or down stairs, the auxiliary handle 23 is locked in the state shown in FIG. 7. Since the operations during climbing up and down stairs, running on the flat ground, and going up and down escalators are the same as those of the prior art, detailed explanations will be omitted.

(Problems to be Solved by the Invention) By the way, in the conventional wheelchair auxiliary trolley, in order to prevent the elastic member 46, which becomes an obstacle to going up and down when using stairs, from protruding below the rear end frame portion 22 of the trolley main body, The auxiliary handle 23 is locked by engaging the lock pawl 43 with the upper pawl engaging hole 41a of the receiving plate 41. Then, the auxiliary handle 23 rotates toward the user 70 of the wheelchair A, so that the auxiliary handle 23 is rotated toward the footrest 63 of the wheelchair A.
The toes 71 of the wheelchair user 70 are placed on the wheelchair. Normally, there is no problem because the handle 23 bends backwards and escapes, but in the case of a large man in wheelchair A as shown in FIG. If the hydraulic cylinder 16 is activated due to posture control in this state, it may cause discomfort to the wheelchair user, or there is a danger that the toe 71 may be caught in the auxiliary handle 71.

Furthermore, when removing the auxiliary handle 23 before and after transporting the wheelchair A, it is necessary to further tilt the auxiliary handle 23 toward the wheelchair user 70, which further increases the possibility of contact with the toe 71. Since the auxiliary handle 23 becomes difficult to attach and detach, there is a problem that the attendant cannot operate smoothly.

Therefore, in order to avoid interference with the toes 71 of the wheelchair user 70, the horizontal part of the auxiliary handle 23 is lengthened. When using an escalator, there was a problem in that the horizontal part of the handle came into contact with the elevator plate 80 on the lower floor side, as shown in FIG.

The object of this invention is to provide a wheelchair auxiliary trolley equipped with an auxiliary handle that is easy to attach and detach and does not cause discomfort or danger to the wheelchair user.

[Structure of the idea]

(Means for Solving the Problems) In order to achieve the above-mentioned object, this invention aims to reduce the width interval of at least the right and left rising portions of the auxiliary handle to the pipe frame of the wheelchair mounted rearward across the trolley body. It is characterized by being wider than the width of the auxiliary handle, and arranged so that the toes of the feet of the wheelchair user placed on the wheelchair footrest are located in the widened space between the rising parts on both sides of the auxiliary handle.

(Function) When the auxiliary handle is configured as described above, even if the wheelchair user is a large man, etc., the footrest of the wheelchair is normally located inside the wheelchair pipe frame, so the feet rest on the footrest of the wheelchair itself cannot be easily moved. The toes of the wheelchair user will not come into contact with the auxiliary handle because the toes will be located in the expanded space of the auxiliary handle.

Moreover, even when the auxiliary handle is further tilted toward the wheelchair side in order to remove it from the above-mentioned state, the auxiliary handle does not come into contact with the wheelchair user's knees, etc., and can be removed smoothly.

〔Example〕

Embodiments of this invention will be described below with reference to the drawings of FIGS. 1 to 3. It should be noted that the present invention has been developed based on the prior art shown in FIGS. 4 to 9 described above, so the same structures and functions as those in the prior art will be given the same reference numerals and explanations will be omitted.

First, in FIGS. 1 and 2, the auxiliary handle 60 locks and supports the handle mounting base 23a on the rear end frame portion 22 of the truck frame 2 of the truck body 1 via the same locking mechanism 50 as in the prior art. installed.

Here, to explain the configuration of the auxiliary handle 60 according to the present invention, the auxiliary handle 60 does not rise immediately from the mounting base 23a, but extends approximately horizontally in the left and right direction, so that the wheelchair user 70 can sit on it. After spreading wider than the pipe frame 62 of the wheelchair main body 61, it rises upwards at right angles in plane and sloped on the side, forming an inverted shape on the back and handle grip portion 60g.
It also has an integrated structure. That is, the auxiliary handle 60 includes handle fixing rod portions 60a, 60b extending in the front and back direction along both sides of the upper surface of the handle mounting base 23a, and the fixing rod portions 60a, 60b.
The width of the handle bending rod portions 60c and 60d, which extend approximately horizontally by bending in the left-right direction from a portion slightly protruding from the rear end of the mounting base 23a, and the pipe frame 62 of the wheelchair A, which is mounted across the trolley body 1. The handle bending rod portion 6 is also arranged with a wide width interval l.
The handle rising parts 60e and 60f on both the left and right sides rise from 0c and 60d as shown in Figures 1 and 2.
and an integrated handle grip portion 60g provided between the upper end portions of the handle rising portions 60e and 60f.

FIG. 3 shows the auxiliary handle 60 in the locked state as shown in FIG. 7 by the locking mechanism 50 (the locked state in which the lock claw 43 is engaged with the upper claw engagement hole 41a of the receiver 41) for use on stairs. This figure shows the handle lock configuration. In this state, even if the wheelchair user 70 is a large man, etc., the wheelchair A
Since the footrest 63 of the wheelchair main body 61 is located inside the wheelchair pipe frame 62, the toes 7 of the foot placed on the footrest 63 of the wheelchair main body 61 are
1 is located in the space of the expanded auxiliary handle 60, so the toe 7 of the wheelchair user 70
1 does not touch any part of the auxiliary handle 60.

Further, even when the auxiliary handle 60 is further tilted toward the wheelchair A side in order to remove the auxiliary handle 60 from the above state (the state shown in FIG. 3),
The auxiliary handle 60 does not come into contact with the knees 72, etc. of the wheelchair user 70, and the attendant can smoothly remove the handle 60.

[Effect of idea]

The wheelchair auxiliary trolley of this invention has the width interval between the right and left rising parts of the auxiliary handle pivotally supported on the rear end frame section wider than the width of the pipe frame of the wheelchair mounted rearward across the trolley body.
The toes of the wheelchair user's feet resting on the wheelchair footrest are located in the widened space between the rising parts on both sides of the auxiliary handle, which causes discomfort to the wheelchair user when operating the auxiliary handle. In addition, the operation of attaching and detaching the auxiliary handle can be performed smoothly without posing a danger to the wheelchair user, and the operation can be performed easily. Therefore, according to the present invention, the wheelchair can be transported safely and smoothly without causing discomfort or anxiety to the wheelchair user. In addition, the auxiliary handle is disclosed in Japanese Patent Application Laid-Open No. 61-235267.
Unlike the auxiliary cart for a wheelchair disclosed in the above publication, since it does not run away in the entire length direction, the size of the cart can be reduced and the cart can be easily operated and transported.

[Brief explanation of the drawing]

FIG. 1 is a front view of an auxiliary cart for a wheelchair equipped with an auxiliary handle according to an embodiment of the present invention, FIG. 2 is a cross-sectional plan view taken along the line - in FIG. 1, and FIG. An explanatory diagram of the action in the installed state,
Figure 4 is a front view showing a conventional wheelchair auxiliary trolley;
Fig. 5 is a cross-sectional plan view taken along the - line in Fig. 4, Fig. 6 is an enlarged sectional view of part B in Fig. 4, and Fig. 7 shows the lock state in Fig. 6 switched to the upper side. FIGS. 8 and 9 are cross-sectional views showing the state in which the auxiliary trolley is used to explain the problems of the prior art. DESCRIPTION OF SYMBOLS 1...Bogie body, 2...Bolly frame, 8...Crawler device, 9...Front wheel, 10...Rear wheel, 13
... Wheelchair fixing handle, 19 ... Hydraulic cylinder, 22 ... Rear end frame portion of trolley body, 23
a... Auxiliary handle mounting base, 41... Receiver, 4
1a, 41b...Upper and lower claw engagement holes, 43...Lock claw, 44...Lock claw release operation lever, 46
...Elastic member, 50...Lock mechanism, 60...Auxiliary handle, 60a, 60b...Handle fixing rod portion, 60c, 60d...Handle bending rod portion,
60e, 60f...Rising portions on both left and right sides of the same handle, A...Wheelchair, 61...Wheelchair body, 62...
...Wheelchair pipe frame, 63...Wheelchair footrest, 70...Wheelchair user.

Claims (1)

[Scope of utility model registration request] A wheelchair auxiliary trolley that carries a wheelchair facing backwards and can be carried up and down stairs and escalators while maintaining a safe posture for the wheelchair user is pivoted on the rear end frame part on the wheelchair footrest side so that the rising angle can be varied. The auxiliary handle is installed in two positions so that the removable rotary auxiliary handle and the elastic member provided at the bottom of the handle mount project into the lower side of the frame at the rear end of the trolley body and into a state where they do not. In an auxiliary wheelchair trolley equipped with a locking mechanism for variably locking stages, the width interval of at least the right and left rising portions of the auxiliary handle is wider than the width of the pipe frame of the wheelchair mounted rearward across the trolley body. An auxiliary trolley for a wheelchair, characterized in that the toes of the feet of a wheelchair user placed on the wheelchair footrest are located in the widened space between the rising portions on both sides of the auxiliary handle.