Title:
GRIP DRIVE FOR EXCAVATOR
Document Type and Number:
Japanese Patent JPH01111983
Kind Code:
A
Abstract:
PURPOSE: To enhance the efficiencies of excavation and sludge discharge by using a movable gripper as at least one of plural grippers placed on one side of inner and outer cylinders, and actuating the movable gripper for opening and closing through the relative extension of the inner and outer cylinders caused by load. CONSTITUTION: An excavator 1 is suspended by a telescopic mechanism comprising an inner cylinder 2 and an outer cylinder 3, and a movable gripper 6b is used as one of a plurality of grippers 6a, 6b. A gripper control mechanism comprises a weight 7 and link mechanisms 8, 9. The excavator 1 is suspended and the telescopic mechanism is extended while the gripper 6b is actuated for closing, so as to discharge sludge through disposition of the excavator 1 in a lowered position and its rise. The gripper control mechanisms 7, 8, 9 are shortened by load applied to the top of the telescopic mechanism by the placement of soil in the excavator 1 and the gripper 6b is automatically closed, with the excavator 1 fixed to a tube inner wall (p) and made to perform excavating functions.
Inventors:
SAITO YASUO
MIZUTA SADACHIKA
MIZUTA SADACHIKA
Application Number:
JP26653087A
Publication Date:
April 28, 1989
Filing Date:
October 23, 1987
Export Citation:
Assignee:
MITSUBISHI HEAVY IND LTD
International Classes:
E21B11/00; E21B4/18; E21B17/10; (IPC1-7): E21B4/18; E21B11/00
Domestic Patent References:
| JPS57146886A | 1982-09-10 | |||
| JPS5716207A | 1982-01-27 | |||
| JPS5838889U | 1983-03-14 |
Attorney, Agent or Firm:
Shigefumi Okamoto (2 others)
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