JPS60240501A - Wheels capable of ascending/descending stairs - Google Patents

Abstract

PURPOSE:To enable a cart or the like to ascend/descend stairs by installing a wheel to each Y-shaped arm provided with a shock absorber and installing said Y-shaped arm to the cart via both each roller attached to the end of each shock absorber and the cam attached to the center of the Y-shaped arm. CONSTITUTION:When a cart runs on the flat ground, wheels 2 and 3 touch the ground and rotate, while a sheel 1 does not take part in running. When the wheel 2 hits a step in the stairs, the central part of a Y-shaped arm 4 moves toward the left, and the whole cart rotates centering around the wheel 2. As a result, the wheel 1 comes on a step. During which time, a cam 9 does not rotate at all and leniently compresses shock-absorbers 5-7 according to its own shape. After this, a platform to which the cam 9 is attached expands since the end- rollers 8 of the shock absorbers 5 to 6 are disengaged from the cam 9, thereby putting the cart back to the original posture. With the repetition of this movement, the cart is able to ascend the stairs. When the cart is to descend the stairs, the above operation is reversed. Thus, the cart can ascend or descend the stairs.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to wheels that are attached to platforms, chairs, machines, instruments, etc. for transporting objects or people, and are used to move smoothly and safely over uneven areas.

With conventional wheels, if you reach a place with even the slightest difference in level, it may become impossible to move or cause a big shock to the loaded object. Therefore, moving objects or people over continuous steps such as stairs requires a great deal of effort and has been abandoned.

The present invention was invented to eliminate the above-mentioned drawbacks, and its structure is explained with reference to the drawings. (a) The wheels (1), (2), and (3) are attached to the Y-shaped arm (4).

Shock absorber (5) (6) on Y-shaped arm (4)
) (7). Shock absorber (5) (
6) Attach rollers (8) (8) (8) to the tip of (7). Attach the cam (9) to the center of the Y-shaped arm (4).

(b) Attach the cam (9) to a platform, chair, machine, instrument, etc. that carries objects or people.

This invention consists of the above configuration.

As shown in Figure 3, this wheel, which has now moved from right to left on a flat surface, rotates with wheels (2) and (3) in contact with the ground, and wheel (1) does not rotate. This is the basic posture.

Continuing to move, when the car (2) hits a step as shown in Figure 4, the center of the Y-shaped arm (4) moves to the left, and the entire wheel rotates around the car (2). Then, car (1) reaches the top of the stage. At this time, the cam (9) does not rotate at all, but slowly follows the shape of the cam (9).
Compress the shock absorbers (5), (6), and (7).

Then, by slightly moving the platform, chair, machine, instrument, etc. that carries the object or person on which the cam (9) is attached, the rollers (8) (8) at the tips of the shock absorbers (5) (6) (7) (8) is removed from the highest part of the cam (9) and extends all at once, so this wheel returns to its basic position. When moving over continuous steps such as stairs, the above operations are repeated.

Next, we will explain the situation when descending a step using Figure 5.

Assuming that this wheel is moving from left to right, if it continues to move as it is, the car (3) will seem to descend rapidly due to the weight placed on the center of the Y-shaped arm (4), but in the basic position , the rollers (8) (8) (8) at the tips of the shock absorbers (5), (6), and (7) are located in the valleys of the cams (9), and the shock absorbers (5) move simultaneously when the car (3) descends. (6) and (7) are rapidly compressed due to the shape of the cam (9), so the wheel descends slowly.

After that, the car (3) reaches the bottom of the step, and the rollers (8) (8) (
8) reaches the highest part of the cam (9), the cam (9)
By slightly moving a platform, chair, machine, equipment, etc. that carries an object or person attached to it, this wheel assumes its basic position. When descending a continuous step such as a staircase, the above steps are repeated.

The present invention applies the features of the shock absorbers (5), (6), and (7) together with the shape of the cam (9), and makes possible what was considered impossible through numerous experiments. Depending on the weight of the load or the condition of the difference in level,
Shape of cam (9), shock absorber (5) (6)
By changing the stretching force in (7), both the practical range and the effect are large.

[Brief explanation of the drawing]

Figure 1 is a front view of the present invention Figure 2 is a sectional view of the present invention Figures 3, 4, and 5 are schematic diagrams of the use of the present invention (1) (2)
) (3) is a car (4) is a Y-shaped arm (5) (6) (7) is a shock absorber (8) is a roller (9) is a cam

Claims (1)

[Claims] (a) The Y-shaped arm (4) has wheels (1), (2), and (3).
Attach. (b) Attach the shock absorbers (5), (6), and (7) to the Y-shaped arm (4). (c) Attach the rollers (8) (8) (8) to the tips of the shock absorbers (5) (6) (7). (d) Attach the cam (9) to the center of the Y-shaped arm (4). (e) Cam (9) can be used as a platform, chair, machine, etc. for carrying things or people.
Attach to equipment, etc. A wheel capable of going up and down stairs, configured as described above.