JPH09221071A - Endless crawler belt, method for changing direction of boggie with crawler belt wheel and its device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable various kinds of friction, resistance and stress accompanied by a rotation of a wheel tcx be substantially dispersed and released by a plurality of wheels and crawler belts by a method wherein a projecting belt is fitted to an inner surface of a flat belt with a small clearance to a wheel groove for use in guiding operation and is integrally constructed. SOLUTION: A crawler belt 1 acting as a flat belt is formed into a V-belt in which it has a projecting belt 3at its inner surface 2 in an integral manner and its projecting belt 3 is fitted to a groove 5 of a small-diameter wheel 4 with a surplus clearance. In addition, a direction changing operation of the boggie having the crawler belt is carried out such that either a jack device kept at a suspended and floor-spaced apart state in normal condition or a second crawler belt wheel 8 is arranged at an inner region 7 of the boggie supported by both main crawler belts, wherein a distance between the second crawler belt wheel part and the boggie is expanded in a vertical direction by a hydraulic mechanism or the like. With such an arrangement as above, it is possible to make a substantial dispersion and releasing of various kinds of friction, resistance and stress accompanied by the rotation of the wheel with a plurality of wheels and crawler belts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crawler belt structure and a technique for changing the direction of a truck with a crawler wheel.

[0002]

2. Description of the Related Art Conventionally, it is possible to easily move a physically handicapped elderly person or a sick person to a table or a kotatsu that has a lower floor than a bed that has a lower floor.
Wheelchairs for nursing care and welfare that use small-diameter wheels for caring are not widely used, and the reason for this is that carts with small-diameter wheels have damaged wheels and tatami mats when moving.

This problem can be solved by mounting a crawler belt on a small diameter wheel. However, as another problem, a technique for stably adjusting the crawler belt and the wheel and a technique for changing the direction when the truck with a crawler wheel is moved are unestablished. It is an obstacle to the spread of trucks with crawler wheels.

[0004]

The inventor has previously filed and presented a low-floor seat-chair device. However, for a dolly with small-diameter caster wheels, the small-diameter wheel uses a tire tube or the like for its structure to form a cushion mechanism. However, hard rubber and polymer products are mainly used, and for this reason, there is a drawback that floors and tatami mats, or soft rugs and rugs are damaged by small-diameter hard wheels.

That is, since the contact pressure and the floor friction are larger than those of the large-diameter wheels when the small-diameter wheel truck is moved, it is necessary to increase the number of wheels, resulting in damage to the tatami mat and the rug. Has been raised as a problem.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a trolley device with track wheels for reducing the floor contact pressure of a trolley with small diameter hard wheels and for reducing wear on the floor surface. By deploying it, the contact pressure load due to the weight of the trolley is distributed, and the frictional resistance between the floor and the wheels is reduced by the crawler belt, and the means for preventing separation between the wheel and the crawler belt, which is a drawback of the crawler belt system, is presented. The disadvantage of the truck with a crawler, which is difficult to change the direction, is that the jack device and the second crawler belt portion are provided, and the directional changeability of the truck is facilitated by the lifting action of the truck by the second crawler belt portion. It presents technology.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

[0008]

[Structure] As shown in FIG. 1, the crawler belt (1) is integrally formed with a projecting band (3) on its inner surface (2), and the projecting band (3) has a margin in the groove (5) of the small diameter wheel (4). It has a V-belt shape so as to match with each other. The combination of the projecting band (3) and the small-diameter wheel having the groove (4) first prevents the track from slipping off. By using a plurality of small-diameter wheel shafts, the weight of the bogie is dispersed, and the floor contact pressure per unit is alleviated and reduced by the thickness and hardness of the track.

As shown in FIG. 2, the direction-changing operation of the truck with a track (6) is carried out in the truck inner area (7) supported by the main crawler belts on both sides. The wheel portion or the crawler wheel portion (8) is provided, and the space between the second wheel portion and the carriage can be expanded vertically by a lever mechanism, a cam mechanism, a hydraulic mechanism, and the like.

Therefore, by operating between the main bogie portion (6) and the second wheel portion (8) by hydraulic pressure, electric or manual operation, the second wheel portion comes into close contact with the floor surface and the main crawler belt portion is lifted together with the bogie. It will be a structure to obtain. Then, at the same time as the trolley part floats, the second part of the main crawler belt part should be rotated so that it can be easily rotated.
Thrust bearings (9) are provided between the axles. The lifting operation is performed by a cam link or a hydraulic device manually or by a stepping handle, and the rotating operation is performed by the same handle or a carrying handle (10) attached to a carriage.

[0011]

[Operation] Normally, the second wheel is spring (11) from the main carriage.
It is set in a suspension shape by the handle, and further has a thrust bearing (9) between the wheel parts or the chassis, and a handle (10).
It is a configuration that can change the direction by. Therefore,
According to the lifting action by the foot lever or the cam, the total weight of the bogie is floated on the second wheel, so that the bogie can be moved in the direction of the second wheel. Further, it is possible to easily lift the truck by levering and change the traveling direction of the crawler truck even while moving.

[0012]

[Effect] The present invention solves the problem of derailment between the track and the wheels,
A truck with a small diameter wheel A strong contact pressure between the small diameter wheel and the floor surface due to the weight of the wheel and various frictions, resistances and stresses associated with the rotation of the wheel can be greatly dispersed and eased by a plurality of wheels and tracks. In addition, the problem of damage to the floor, tatami mats, rugs, etc., caused by the conventional method of directly moving small wheels has been reduced. It is possible to realize a low-floor mobile wheelchair chair for care and welfare at home by making it possible to easily change the direction of the track truck and use the low-floor truck on an indoor tatami mat or on a rug. Technology.

[0013]

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a combination structure of an endless crawler belt having a projecting belt portion on an inner surface thereof and a grooved wheel, and an explanatory view of a crawler belt wheel end portion.

FIG. 2 shows a second direction-changing crawler belt portion provided in an inner area of a trolley supported by crawler belt wheels on both sides.
(B) is a side view, and (C) is a front view and a schematic configuration view of the leverage.

FIG. 3 is a partially enlarged explanatory diagram of FIG.
FIG. 6 is a partially enlarged view of a lever handle mechanism capable of lifting the trolley portion by the crawler belt portion.

[0014]

[Explanation of symbols]

In the figure, 1 ... crawler belt, 2 ... crawler belt inner surface, 3 ... crawler belt projecting belt, 4 ...
Small-diameter wheels, 5 ... Grooves, 6 ... Main bogie with crawler track, 7 ... Bogie inner area, 8 ... Second crawler wheel section, 9 ... Thrust bearing, 1
0 ... Handle, 11 ... Suspension spring, 12 ... Lever fulcrum.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B62D 11/00 B62D 11/00

Claims (5)

[Claims] 1. An endless crawler belt integrally formed on the inner surface of a flat belt with a small gap for fitting into a wheel groove portion to perform a guiding action. 2. The trolley device with track wheels according to claim 1, wherein the crawler belt width is larger than the wheel width so as to prevent the cilia from being caught. 3. A trolley in which both sides are supported by crawler wheel parts, a jack part for lifting the dolly is provided in an inner area of both crawler tracks, and the crawler wheel part connected to the trolley by grounding the jack parts is dolly. A method for changing the direction of a trolley with track wheels that both lifts and leaves the floor and changes the direction of the trolley. 4. A sub-wheel portion is formed in an inner area of a main crawler belt for supporting a bogie, and the sub-wheel portion is suspended from the bogie portion in a bed-like shape. When the bogie is turned, mechanical and hydraulic pressure is applied between the sub-wheel portion and the bogie. -A truck with a track wheel that changes the direction of the main track by lifting the truck section with the sub-wheel section by forcibly opening using an electric mechanism. 5. An inner area of a trolley supported by both wheels of the main crawler belt,
An auxiliary crawler wheel part is constructed, and this auxiliary crawler wheel part is suspended from the normal trolley to leave the floor.When changing the direction of the bogie, the auxiliary crawler wheel part is used as a fulcrum, and the lever part of the handle part lifts the main crawler wheel. Truck equipment with crawler wheels.