Title:
DRILLING DEVICE
Document Type and Number:
Japanese Patent JP2019126912
Kind Code:
A
Abstract:
To provide a drill capable of suppressing reduction in rotational frequency during drilling.SOLUTION: A drill 100 comprising a driving motor 13 removable with a bit 2 drilling a member to be drilled and rotating the bit 2, includes: a sensor 15 measuring the rotary frequency of the driving motor 13; and feed back control means 19 feed back controlling the driving motor 13 in such a manner that the rotary frequency measured with the sensor 15 retains the objective rotary frequency beforehand corresponded to the outside diameter of the bit 2.SELECTED DRAWING: Figure 3
Inventors:
NAKAYABU TOMOKI
Application Number:
JP2018007856A
Publication Date:
August 01, 2019
Filing Date:
January 22, 2018
Export Citation:
Assignee:
GOEI SEISAKUSHO KK
International Classes:
B28D1/14; B23B45/02; B28D7/02
Domestic Patent References:
| JPS59191206U | 1984-12-19 | |||
| JP2003039423A | 2003-02-13 | |||
| JP3043121U | 1997-11-11 | |||
| JP2013067023A | 2013-04-18 | |||
| JP2005145041A | 2005-06-09 |
Attorney, Agent or Firm:
Isono International Patent and Trademark Office