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Title:
ALL-CASING EXCAVATOR AND CASING TUBE TIGHTENING DEVICE
Document Type and Number:
Japanese Patent JPH11350864
Kind Code:
A
Abstract:

To provide an all-casing excavator having high general-purpose property, excelling in tightening performance (holding performance), and having a casing tube tightening device of high performance.

A condition in which a casing tube 3 is opened or tightened by a band dividing into three parts or a condition in which the casing tube 3 is opened or tightened by a band dividing into five parts is selected by mounting or removing a pulling and insertion pin 48 to correspond to the casing tube 3 which has a thin wall, high roundness, and high precision of dimension of outer shape and is close to an inside diameter D formed by a fixed band 44 and a movable band 45 and correspond to even to the casing tube 3 having low roundness and small outside diameter. Consequently, it is possible to provide a casing tube tightening device 43 having high general-purpose property, excellent tightening performance (holding performance), and high performance.


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Inventors:
KITAMURA YUZO
EGAWA KIKUJI
Application Number:
JP16031098A
Publication Date:
December 21, 1999
Filing Date:
June 09, 1998
Export Citation:
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Assignee:
MITSUBISHI HEAVY IND LTD
International Classes:
E21B3/02; E21B7/20; E21B19/06; (IPC1-7): E21B7/20; E21B3/02; E21B19/06
Attorney, Agent or Firm:
Toshiro Mitsuishi (2 outside)