| 摘要 |
<p>PURPOSE:To facilitate storage and carrying-out of work trays by equipping an elevating rack with a reference address and an additional address, by sensing the reference address while the rack is situated within the sensible scope of the reference sensor and by sensing the additional address using a subsensor while situated outside said scope. CONSTITUTION:The current address of an elevating rack 1B is perceived by a reference sensor 4 or subsensor 4, and the rack 1B is elevated or sunk. Reaching of a rack 14a to the position of a storage table 2A is perceived by the reference sensor 4 if it lies within the sensible scope so as to stop the elevating rack 1B, and the storage table 2A intrudes into the elevating rack 1B. In case a rack 20 reaches the position of rack 13, but the reference sensor 4 does not receive the reference address S1 because of outside the sensible scope, the subsensor 3 conducts perceiving. If at the same time the subsensor 3 perceives the added locational address S4, the elevating rack 1B is stopped to allow intrusion of a carryout table 2B into the elevating rack 1B. This simplifies the control circuit without requiring to switch the signal for each table to lead to facilitation of storage and carrying-out of work trays on the table.</p> |
