| 摘要 |
The mechanical hand (16) comprises, on one hand, a zone (46) for the support and sliding of a panel or slab (SP) in a horizontal working plane (WP) and, on the other hand, a handling gripper (36) which can move horizontally along and across the whole range of said supporting and sliding zone (46). The gripper (36) has a lower jaw (40) located below the working plane (WP). The support and sliding zone (46) is defined by retractable members consisting of an array of vertically moving pillars (48) with each of which are associated positive control means for causing them to perform selectively a travel independently of that of the other pillars between a raised position in which one of its upper support and sliding surfaces is in the working plane (WP), and a lowered position in which the surface is at a level which is lower than that of the lower jaw (40) of the gripper (36). Control means are provided which interconnect the means (Mx, My, Mz) for controlling the movement of the gripper (36) and the means for controlling the movements of each support (48) such that, when the gripper (36) passes through and stops in the zone (46) of the pillars (48), the pillars (48a) which are in correspondence with or in the vicinity of the gripper (36) are lowered such that they do not interfere with its lower jaw (40) whilst the other pillars (48) are raised in order to hold the panel (SP).
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