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US 12,746,952 B2Granted
Article transport device
AssigneeDaifuku Co., Ltd.
InventorTomohiko Kawashima
Life of this patent
Estimating the term…
Abstract
It is sensed that a first guide roller of a first guide roller pair has been worn and/or that a second guide roller of a second guide roller pair has been worn. In an article transport device, a first sensor and a second sensor are attached to a frame, a distance between the first sensor and a first guide roller pair is shorter than a distance between the first sensor and a first wheel, and a distance between the second sensor and a second guide roller pair is shorter than a distance between the second sensor and a second wheel.
Claims7
An article transport device comprising a traveling vehicle,
- the traveling vehicle having:
- a first wheel;
- a second wheel that is disposed so as to be spaced apart from the first wheel in a traveling direction, which is a direction along a guide rail;
- a first guide roller pair that has a pair of first guide rollers between which the guide rail is sandwiched in a direction intersecting the traveling direction;
- a second guide roller pair that has a pair of second guide rollers between which the guide rail is sandwiched in the direction intersecting the traveling direction and that is disposed so as to be spaced apart from the first guide roller pair in the traveling direction;
- a frame in which the traveling direction is a longitudinal direction and to which the first guide rollers and the second guide rollers are attached;
- a first sensor which detects a horizontal distance between the frame and the guide rail;
- and
- a second sensor which is disposed so as to be spaced apart from the first sensor in the traveling direction and which detects the horizontal distance between the frame and the guide rail,
- the first sensor and the second sensor each being attached to the frame,
- the first guide roller pair being located closer to the first wheel than the second guide roller pair and the second sensor in the traveling direction, the first sensor being located closer to the first wheel than the second guide roller pair and the second sensor in the traveling direction,
- a distance between the first sensor and the first guide roller pair in the traveling direction being shorter than a distance between the first sensor and the first wheel in the traveling direction, and
- a distance between the second sensor and the second guide roller pair in the traveling direction being shorter than a distance between the second sensor and the second wheel in the traveling direction.
10 more elements
Dependencies are inferred from the claim text.