Patent ID: 8939698
Filing Date: 2015-01-27
Classification: B66C,H01L

Abstract:
1. An overhead travelling vehicle comprising: a travelling unit, an elevation device lifting and lowering articles, and a lateral movement mechanism, the lateral movement mechanism including a base member supported by the travelling unit and a moving unit supporting the elevation device, the base member moving the moving unit between a state in which the moving unit laterally protrudes from the travelling unit and a state in which the moving unit is retracted to a position under the travelling unit, and an engagement device engaging the moving unit or the elevation device with the base member or the travelling unit in the state in which the moving unit is retracted to the position under the travelling unit, wherein the moving unit or the elevation device has a member provided with a hole for engagement, and the engagement device includes at least one pin that is advanced and retracted between a state in which the pin is engaged in the hole and a state in which the pin is disengaged from the hole, and a mechanism for advancing and retracting the at least one pin, wherein the moving unit includes a top unit supporting the elevation device and a middle unit disposed between the base unit and the top unit, each of the top unit and the middle unit has the member provided with a hole for engagement, and the engagement device engages and disengages the at least one pin in and from the respective holes for engagement of the top unit and the middle unit.