To reduce wrong detection by decreasing the inclination of a detection piece to a support member even if a presser fitting for pressing the detection piece to the support member.
This blade breakage sensor includes: the detection piece 11 provided with a slit 25 formed in the extending direction of a flat base end part and having conductivity; a support member 9 supporting the detection piece 11 and having conductivity; a presser fitting 33 for pressing and fixing the base end part to the support surface 27 of the support member 9 by passing a screw through the slit 25 of the detection piece 11; and a cable 13 connected to the support member 9. A groove 41 having a width corresponding to the base end part of the detection piece 11 is formed in the support surface 27, and the base end part of the detection piece 11 is stored in the groove 41, whereby even if a screw 31 of the presser fitting 33 is loosened, the detection piece 11 is restrained from being inclined to the support member 9. As a result, the raceway track of the detection piece 11 is separated from the knife edge of a tool 1 to reduce wrong detection about blade breakage of the tool 1.
OTANI ISAO
NAGATA HIDENORI
KYOHO MACHINE WORKS LTD
JPH0379209U | 1991-08-13 | |||
JPH02185345A | 1990-07-19 | |||
JPH05305553A | 1993-11-19 | |||
JPS60161539U | 1985-10-26 |
Tatsuyuki Unuma
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