PURPOSE: To detect the various specifications of a work without being accompanied with deterioration in the input and output cables of a sensor or the sensor itself. ;CONSTITUTION: A limit switch 10 positioned on an A point, a photocell 11 on a B point, a reflection type color difference judgement sensor 12 on a C point, and a supersonic wave board thickness sensor 12 on a D point are anchored on each ground on a transfer path 18 for transferring a work W grasped and held by the wrist part 5 of a general robot 18 as far as a jig 7. Upon detecting that the work W meets predetermined specifications from the results of detection at A-D points, the general robot 1 moves the work W to the E point from the D point to set the work W on the jig 7. Therefore, only the work W meeting the predetermined specifications is set on the jig 7. The work W set on the jig 7 is carried to the assembling process for a car body meeting the specification for assembling the work W.;COPYRIGHT: (C)1993,JPO&Japio
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