Title:
セントラライザ装置
Document Type and Number:
Japanese Patent JP6740103
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a centralizer device in which the abnormal wear of a support member does not occur even if an external force acts on a rod during boring work, and which can stably maintain a guide state.SOLUTION: A centralizer device 110 comprises: a pair of clamp arms 120 which are arranged at a base frame 111 so as to be oscillatory around a pivot along a boring axial line CL; a pair of holders 130 which are arranged at tip sides of a pair of the clamp arms 120 via an oscillation slide mechanism; and a hydraulic cylinder 150 whose both ends are pivoted to base end sides of a pair of the clamp arms 120 by a support shaft along the boring axial line CL. The oscillation slide mechanism slidably and movably supports a pair of the holders 130 in an orthogonal direction of the boring axial line CL in response to the oscillation of a pair of the clamp arms 120, and at the closure of the holders, an inter-support shaft distance of the hydraulic cylinder 150 is set longer than an inter-pivot distance of a pair of the clamp arms 120.SELECTED DRAWING: Figure 4
Inventors:
Hirano Eiji
Tomoya Nagata
Tomoya Nagata
Application Number:
JP2016229979A
Publication Date:
August 12, 2020
Filing Date:
November 28, 2016
Export Citation:
Assignee:
Furukawa Rock Drill Co., Ltd.
International Classes:
E21B19/24
Domestic Patent References:
| JP2012504721A | ||||
| JP57168588U | ||||
| JP54088002U | ||||
| JP48040402U | ||||
| JP2014508871A | ||||
| JP2003253670A | ||||
| JP56067433U | ||||
| JP60077842U | ||||
| JP2000038930A |
Foreign References:
| WO2003031766A1 |
Attorney, Agent or Firm:
Tetsuya Mori
Hide Tanaka Tetsu
Ichi Hirose
Hide Tanaka Tetsu
Ichi Hirose