Patent ID: 8302451

Claim:
A can manufacturing device provided with: a workpiece supporting base that supports, on a circumference thereof, a plurality of bottom-ended cylindrical workpieces having an axis; and a tool supporting base that supports a plurality of working tools for performing working on the workpieces and that is arranged facing the workpiece supporting base in the axial direction of the workpiece, in which the plurality of working tools are made to approach and move away from the workpiece supporting base in the axial direction of the workpieces, to thereby perform working on the workpieces supported on the workpiece supporting base, wherein the tool supporting base is provided with: a plurality of working tool units that support the plurality of working tools; a supporting member that supports the plurality of working tool units; and a linear driving mechanism that reciprocates the working tool units with respect to the supporting member in the axial direction of the workpiece, and the linear driving mechanism is provided with: a guide section that is fixed on the supporting member with a base plate therebetween; a slide rail that is fixed on the working tool unit and that slides along the guide section; an electromagnetic coil provided on the base plate; a magnet plate that is provided on the working tool unit and that generates, between the electromagnetic coil and itself, a thrust force for the guide section; and a supply pipe that is provided at the electromagnetic coil and that supplies coolant to the inside of the electromagnetic coil.