Abstract: An upper shelf section of a holding rack includes an upper placement section fixed to a ceiling. A lower shelf section of the holding rack includes: a fixed support fixed to the upper shelf section, a lower placement section supported by the fixed support so as to be capable of advancing and retreating relative to a travel rail as viewed in a vertical direction; and a drive transmission mechanism drivable by a rack drive mechanism of a transport vehicle to cause the lower placement section to advance and retreat. The lower placement section is positioned directly below the upper placement section while in a retreated position, and is positioned directly below the travel rail while in an advanced position. The lower placement section is below a lower end of the transport vehicle.

Abstract: A size of a conveyance device is reduced. A conveyance device includes: a carriage configured to travel along a track; and a transfer mechanism hung from the carriage so as to be capable of being raised and lowered. The transfer mechanism includes a plurality of chucks each of which is configured to revolve about a rotation center provided in the transfer mechanism.

Abstract: An article transport facility includes a plurality of article transport vehicles. A travel route includes a main transport route; a first branch route that branches from the main transport route, passes through a transfer position at which an article is transferred, and merges with the main transport route; and a second branch route that branches from the first branch route at a position downstream of the transfer position, or branches from the main transport route, and merges with the first branch route at a position upstream of the transfer position. The first branch route includes a first standby section at a position upstream of the transfer position, and the second branch route includes a second standby section.

Abstract: The article transport vehicle includes a travel section, a holding section, an elevating device, an inclination detection device, an inclination adjustment device, and an inclination control device for controlling the inclination adjustment device. The inclination adjustment device is configured to act on a target belt among a plurality of suspension belts to adjust an inclination of the holding section by adjusting a suspension height at which the holding section is held by the target belt. During the lowering of the holding section to the transfer position by the elevating device, the inclination control device executes an adjustment operation during lowering, in which the inclination of the holding section is detected by the inclination detection device, and based on the result of the detection performed by the inclination detection device, the inclination adjustment device is controlled to adjust the inclination of the holding section.

Abstract: In order to facilitate horizontally hanging an object, a hanging mechanism includes: a first hanging shaft to be hung from a ceiling; a second hanging shaft supported so as to be hung from the first hanging shaft; and a connecting section connecting the first hanging shaft and the second hanging shaft. The connecting section includes: a protruding spherical surface of a first connecting member that is provided on the first hanging shaft side; and a recessed surface portion, which is a recessed spherical surface of a second connecting member that is provided on the second hanging shaft side and that is in contact with the spherical surface of the first connecting member.

Abstract: An upper shelf section of a holding rack includes an upper placement section fixed to a ceiling. A lower shelf section of the holding rack includes: a fixed support fixed to the upper shelf section, a lower placement section supported by the fixed support so as to be capable of advancing and retreating relative to a travel rail as viewed in a vertical direction; and a drive transmission mechanism drivable by a rack drive mechanism of a transport vehicle to cause the lower placement section to advance and retreat. The lower placement section is positioned directly below the upper placement section while in a retreated position, and is positioned directly below the travel rail while in an advanced position. The lower placement section is below a lower end of the transport vehicle.