Article transport vehicle

Abstract

An article transport vehicle includes: a travel unit; an article holder; two lift mechanisms each including a roller chain and configured to raise and lower the article holder; and a guide mechanism configured to guide the article holder in a lifting direction. The guide mechanism includes: a guide rail held by the travel unit and extending along an up-down direction; a plurality of rollers configured to roll in contact with the guide rail; a roller support supporting the plurality of rollers, and a joint mechanism joining the roller support to the article holder. The plurality of rollers are disposed in such a manner as to restrict movement of the roller support in a first direction and a second direction while allowing the roller support to move in the up-down direction relative to the guide rail.

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