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1. (WO2018180083) ROTARY TOOL

Pub. No.:    WO/2018/180083    International Application No.:    PCT/JP2018/006761
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Sat Feb 24 00:59:59 CET 2018
IPC: B25F 5/00
B24B 23/02
H02P 6/24
Applicants: KOKI HOLDINGS CO., LTD.
工機ホールディングス株式会社 
Inventors: SAKAI Hironori
坂井 裕紀
YOSHINARI Takuya
吉成 拓家
MASHIKO Hironori
益子 弘識
Title: ROTARY TOOL
Abstract:
Provided is a rotary tool in which, when a switch is turned off to stop a tip tool, a fixture that fixes the tip tool is prevented from being loosened. This rotary tool, in which a tip tool rotated by a fixture is mounted on a spindle, and the spindle and the tip tool are rotated by means of a motor, has: a switch which can switch the motor between a rotation state or a stoppage state; and a control device which controls the rotation of the motor according to the operation of the switch, wherein, when the switch is turned off after a required time T elapses after the motor is started, the control device stops the rotary tool (104d, 106d) by performing a common braking operation on the spindle, and when the switch is turned off before the required time T elapses after the motor is started, the control device stops the tip tool (101d) by means of inertia without applying a braking force.