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Title:
HORIZONTAL BORING MACHINE
Document Type and Number:
Japanese Patent JPH07197759
Kind Code:
A
Abstract:

PURPOSE: To enhance boring efficiency of a boring machine by changing the frequency of supply power according to the types of soil to change the rotational frequency of a cutter through an inveter motor.

CONSTITUTION: An inverter motor is used as a motor for driving a cutter 7 of a horizontal boring machine boring in the ground substantially in the horizontal direction. The frequency of power supplied to the motor 13 is changed so that the rotational frequency of the motor 1 is changed.


Inventors:
SEKINO TAKASHI
Application Number:
JP1993000338501
Publication Date:
August 01, 1995
Filing Date:
December 28, 1993
Export Citation:
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Assignee:
ISHIKAWAJIMA ZOSEN KAKOKI KK
International Classes:
E21B4/04; E21D9/08; (IPC1-7): E21B4/04; E21D9/08
Attorney, Agent or Firm:
杉村 暁秀 (外5名)



 
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