| 摘要 |
<p>Movable sensing arrangements are prone to damage, unable to position a load engaging device relative to a load for stacking purposes, and unable to controllably position the sensing arrangement. A movable sensing apparatus (28) having a housing (38) and first and second signaling devices (34, 36) mounted in the housing (38) is provided. A guide rail assembly (54) elevationally movably mounts the housing (38) on a carriage assembly (22) and an actuator (64) controllably elevationally moves the housing (38) along the guide rail assembly (54). A coupling (82) connects the actuator (64) to the housing (38) and releases the housing (38) from connection with the actuator (64) in response to a force of a preselected magnitude being applied to the housing (38). Thus, the problems related to damage, stacking, and positioning are reduced. The movable sensing apparatus (28) is particularly suited for use on an automatic guided unmanned vehicle (10) having a lift mast assembly (16).</p> |
