WORK CLAMPING DEVICE

PURPOSE:To surely enable the confirmation of the set of a work and the confirmation of clamp with the simple constitution. CONSTITUTION:A work installing jig 12 is provided, and this jig 12 is equipped with a plurality of standard seats 14, clamping means 16 and 18 for press-holding a work W placed on the standard seat 14, and supporting members 24 and 26 which contact the other edge surfaces 20b and 22b of the clamping pieces 20 and 22 which constitute the clamping means 16 and 18. The first passage 42 which communicates with the first injection ports 38 of the standard seat 14 and the second injection port 48 and 50 of the supporting members 24 and 26 communicates through a connecting means 60 to the second passage 62 in which a pressurized fluid feeding source 76 and the first and the second pressure switches 80 and 82 which are operated by each different set pressure are arranged.