| 摘要 |
PROBLEM TO BE SOLVED: To provide a tube drawing tool provided with a collar of the contact area magnification section so as to remove a tube from a tube plate without removing scale and damaging the tube plate. SOLUTION: The tube drawing tool is provided with a removing means for removing with the rod an engaging member in which a blade is engaged in the inner surface of a tube, and a collar which is provided between the removing means and the peripheral part of the tube of the tube plate supporting the tube and which makes removing reaction force as the removing means operate to the both while allowing the rod to move back and forth. The tip of the collar part is provided with the contact area magnification section extending from the outer periphery of the tip to the peripheral part of the tube adjacent to the tube plate so as to be abutted to the peripheral part.
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