Stair-climbing wheelchair carrier

Abstract

An extension / retraction cylinder (5) stops or starts tilting the platform (21) of a stair-climbing wheelchair carrier (2) based on a detection signal from an inclination sensor (51) provided in a crawler drive unit (3). When the crawler drive unit (3) is detected to be not tilted, the tilting motion of the platform (21) is stopped at an intermediate angle (e. g. 20 °) of a maximum preset angle (e. g. 40 °). When the crawler drive unit (3) is detected to be tilted, the platform (21) is tilted up to the maximum preset angle, and as soon as the crawler drive unit (3) is detected not to be tilted after tilting, the platform (21) is driven so as to decrease its inclination angle relative to the crawler drive unit (3). Thus, a comfortable and usable stair-climbing wheelchair carrier (10) can be provided.

Description

technical field [0001] The present invention relates to a stairlift for wheelchairs for carrying a wheelchair up and down stairs. Background technique [0002] Patent Document 1 discloses a conventional stair lift for wheelchairs. This prior art will be described based on FIG. 1 ( FIG. 1( a ) shows a state of moving on flat ground, and FIG. 1( b ) shows a state of going up and down stairs). The main structure of this wheelchair stair lift 1 is as follows: it is composed of a wheelchair mounting part 2 and a crawler belt drive part 3, and the end of the wheelchair mounting part 2 (the rear end of the wheelchair K to be mounted) is pivotally supported by a pivot 4. On the crawler belt driving part 3, the wheelchair carrying part 2 can be tilted relative to the crawler belt driving part 3 through the telescopic action of the telescopic hydraulic cylinder 5, one end of the telescopic hydraulic cylinder 5 is pivotally supported on the wheelchair carrying part 2, and the other O...

AI Technical Summary

Problems solved by technology

[0011] However, according to such an existing wheelchair stair lift 1, if the crawler belt driving part 3 is close to a horizontal state on the flat ground before and after going up and down the stairs or on the platform in the middle of the stairs, the wheelchair carrying part 2 will become backward relative to the crawler belt driving part 3. Just tilting is a posture in which a slight reclining angle is added to the inclination angle of the stairs (approximately 40 degrees when the inclination angle of the stairs is 35 degrees), so it becomes a state of leaning backwards to a large extent, and is mounted on a wheelchair The user K1 who is carrying the wheelchair K on the floor 21 turns his eyes toward the ceiling and feels uncomfortable.

[0012] And, when the posture of the wheelchair-mounted portion 2 is in a state inclined to a large extent relative to the caterpillar drive portion 3 in a substantially horizontal state, since the holding operation body 24 of the wheelchair-mounted portion 2 is inclined backward, a Large space, resulting in the problem of not ensuring enough operating space on narrow platforms, etc.

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