An article transport vehicle configured to travel along a first rail and a second rail parallel to each other and transport an article, the article transport vehicle comprising:
- a vehicle body to which an article holder configured to hold the article is joined;
- at least one first wheel supported by the vehicle body rotatably about a first rotation axis along a width direction orthogonal to a direction in which the first rail and the second rail extend as viewed in an up-down direction, and configured to roll on a first travel surface, which is a travel surface of the first rail;
- and
- at least one second wheel supported by the vehicle body rotatably about a second rotation axis along the width direction, and configured to roll on a second travel surface, which is a travel surface of the second rail,
- wherein:
- the at least one first wheel has a first outer circumferential face configured to come into contact with the first travel surface,
- the at least one second wheel has a second outer circumferential face configured to come into contact with the second travel surface,
- the at least one first wheel has a first-wheel body that includes the first outer circumferential face and is made of a synthetic resin,
- the at least one second wheel has a second-wheel body that includes the second outer circumferential face and is made of a synthetic resin,
- the first outer circumferential face has a plurality of first recessed grooves extending in a circumferential direction of the at least one first wheel,
- the second outer circumferential face has a plurality of second recessed grooves extending in a circumferential direction of the at least one second wheel,
- the first-wheel body has a first side face facing a first side in the width direction, and a second side face facing a second side in the width direction, the first side in the width direction is a side in the width direction on which the at least one first wheel is disposed relative to the at least one second wheel, the second side in the width direction is a side opposite to the first side in the width direction,
- the second-wheel body has a third side face facing the first side in the width direction, and a fourth side face facing the second side in the width direction,
- the first side face is separated, in the width direction, from a first recessed groove disposed farthest on the first side in the width direction among the plurality of first recessed grooves, by a distance that is larger than a distance by which the second side face is separated, in the width direction, from a first recessed groove disposed farthest on the second side in the width direction among the plurality of first recessed grooves, and
- the fourth side face is separated, in the width direction, from a second recessed groove disposed farthest on the second side in the width direction among the plurality of second recessed grooves, by a distance that is larger than a distance by which the third side face is separated, in the width direction, from a second recessed groove disposed farthest on the first side in the width direction among the plurality of second recessed grooves.