| 摘要 |
PROBLEM TO BE SOLVED: To easily change an in-tube insertion and expansion type clamp for holding both ends of a metal tube to be bent to a turning arm or a pusher. SOLUTION: In an arm turning type metal tube bending device, a tube end clamp 48+50 (32+33) for holding ends of a metal tube 10 is divided into a device side clamp 48 (32) provided on a device body such as a turning arm 40 and a pusher 30, and a tube end side clamp 50 (33) which is separate from the device body and attachable/detachable to/from an end 11 (12) of the metal tube 10. The tube end side clamp 50 (33) comprises an expansion unit 60 which is pressed against an inner circumferential surface of the metal tube 10 to hold the metal tube, and a cylindrical part 51 storing its driving mechanism. The device side clamp 48 (32) is pressed against an outer circumferential surface of the cylindrical part 51 to hold the tube end side clamp 50 (33). COPYRIGHT: (C)2009,JPO&INPIT
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