To provide a metal tube bender capable of preventing the metal tube from thinning down by effectively giving compressive force to the metal tube with a compact drive source without complicating its compression control.
In a metal tube bender including a heating means for circularly heating the metal tube, a propelling means for propelling the metal tube to the heating means, an arm capable of holding the metal tube and turning the metal tube around a support spindle, and a compression means for adding pulling-back force for pulling back the turning arm in response to propelling of the metal tube resulted from the propelling means to the arm around the support spindle as a fulcrum and applying the compressive force to the metal, the compression means includes a chain connected with an external position of the arm rather than a holding point of the metal tube as viewed from a support spindle side, and a hydraulic motor for applying the pulling-back force to the external position of the arm via the chain. Further, a chain guide for guiding the chain at an arc state is provided along a turning track of the arm.
YOSHITOME TAKAHIRO
MURANO SHINICHI
| JPS548154A | 1979-01-22 | |||
| JP2000153311A | 2000-06-06 | |||
| JPS54128970A | 1979-10-05 | |||
| JPS61143712U | 1986-09-05 | |||
| JP2009131867A | 2009-06-18 | |||
| JPS51149861A | 1976-12-23 | |||
| JPS54112769A | 1979-09-03 | |||
| JP2009012062A | 2009-01-22 |
Hiroshi Aichi
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