| 摘要 |
PROBLEM TO BE SOLVED: To provide a tapping device capable of lengthening the service life of a bent tap, and capable of improving quality of a nut product. SOLUTION: This tapping device 1 has the rotatable bend tap 2 having a tap part 2a. The tapping device 1 has a reciprocatable push rod body 21 for pressing a nut raw material to the tap part 2a of the bend tap 2. The tapping device 1 has a pus rod body driving means 22 for reciprocating the push rod body 21 and a shock absorbing means 23 for relieving a shock when the tap part 2a contacts with the nut raw material. COPYRIGHT: (C)2007,JPO&INPIT
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