Title:
PORTABLE DRILLING MACHINE
Document Type and Number:
WIPO Patent Application WO/2011/077485
Kind Code:
A1
Abstract:
Disclosed is a portable drilling machine wherein when a shorting failure occurs in a circuit part connected to a driving motor, this state is reliably detected and a false start of the motor is reliably prevented. A driving motor control circuit (78) in this portable drilling machine comprises a main control section (86); a triac (58) and a relay (60) which are connected to power supply terminals (38L, 38M) in series with the driving motor (42); peripheral circuits (44) (a triac control circuit (66), a relay control circuit (68), a triac inspection and determination section (70), a bypass resistor (72), etc.) which are related to this triac (58) and this relay (60); and a current measurement section (64) for measuring current flowing in the driving motor (42).
Inventors:
OHTSUKA, Kenji (9-4, Nakaikegami 2-Chome, Ohta-k, Tokyo 55, 〒1468555, JP)
Application Number:
JP2009/007180
Publication Date:
June 30, 2011
Filing Date:
December 24, 2009
Export Citation:
Assignee:
NITTO KOHKI CO., LTD. (9-4 Nakaikegami 2-Chome, Ohta-ku Tokyo, 55, 〒1468555, JP)
日東工器株式会社 (〒55 東京都大田区仲池上二丁目９番４号 Tokyo, 〒1468555, JP)
日東工器株式会社 (〒55 東京都大田区仲池上二丁目９番４号 Tokyo, 〒1468555, JP)
International Classes:
B23B45/02; B23B45/14
Attorney, Agent or Firm:
SASAKI, Seikoh (SASAKI & ASSOCIATES, 302 Surugadai Saikachizaka Building 2-11-16, Kanda-surugadai, Chiyoda-k, Tokyo 62, 〒1010062, JP)
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