| 摘要 |
A ceiling transport vehicle is provided in which any obstacle located below a vertically movable member can be detected properly while reducing any increase in the size of the ceiling transport vehicle even when transporting large articles. An obstacle detecting portion is fixed to a main body portion at a location that is above an article supported by a vertically movable member located at a transport purpose position, and that is within an area in which the article exists in plan view such that a direction in which detection light, etc., is emitted is tilted outward of the article. When vertically moving the vertically movable member between the transport purpose position and the transfer purpose position, the controller is configured not to determine presence of an obstacle based on detected information from the obstacle detecting portion while the vertically movable member is located in a subject range, and is configured to determine presence of an obstacle while it is not located in the subject range. |
| 主权项 |
1. A ceiling transport vehicle comprising:
a travel portion capable of traveling along a travel rail suspended from a ceiling; a main body portion which is suspended from and supported by the said travel portion and which travels integrally with the travel portion; a vertically movable member which is capable of supporting an article to be transported and which is vertically movable with respect to the main body portion between a transport purpose position located inside the main body portion and a transfer purpose position below the main body portion; wherein the ceiling transport vehicle transports an article along the travel rail by a traveling operation of the travel portion, with the article supported by the vertically movable member located at the transport purpose position, and is capable of transferring an article to and from an article transfer location by a vertical movement operation of the vertically movable member between the transport purpose position and the transfer purpose position; and further comprising: an obstacle detecting portion for detecting an obstacle by emitting detection light or detection sound downwardly to detect the obstacle that becomes an obstruction when transferring an article to or from the article transfer location; a vertical position detector for detecting a vertical position of the vertically movable member; and a controller for controlling vertical movement operation of the vertically movable member based on detected information from the vertical position detector; wherein the obstacle detecting portion is fixed to the main body portion at a location that is above an article supported by the vertically movable member located at the transport purpose position, and that is within an area in which the article exists in plan view such that a direction in which the detection light or the detection sound is emitted is tilted outward of the article, wherein, when vertically moving the vertically movable member between the transport purpose position and the transfer purpose position, the controller is configured not to determine presence of an obstacle based on detected information from the obstacle detecting portion while the vertically movable member is located in a subject range, and is configured to determine presence of an obstacle based on detected information from the obstacle detecting portion while the vertically movable member is not located in the subject range, and wherein, with a detection range being defined as a range in which the detection light or the detection sound of the obstacle detecting portion detects an article supported by the vertically movable member, the subject range is set so as to include the detection range. |
