Title:
深礎掘削機
Document Type and Number:
Japanese Patent JP7166487
Kind Code:
B2
Abstract:
A bucket raising/lowering and opening/closing device (11) of a deep foundation excavator (1) includes a raising/lowering cylinder (12), a first raising/lowering sheave (14) and a first opening/closing sheave (15) that move in an expansion/contraction direction of the raising/lowering cylinder (12), a second raising/lowering sheave (17), a second opening/closing sheave (20), an opening/closing cylinder (18) that moves the second opening/closing sheave (20) to be closer to and to be separated from the first opening/closing sheave (15), a raising/lowering rope (24) that is wound around the first raising/lowering sheave (14) and the second raising/lowering sheave (17), and an opening/closing rope (25) that is wound around the first opening/closing sheave (15) and the second opening/closing sheave (20) . In addition, provided are a slack adjustment cylinder (26) that expands and contracts to adjust the slack of the opening/closing rope (25), and a slack adjustment sheave (28) that moves in a direction of being closer to and being separated from the second opening/closing sheave (20) in response to an expansion/contraction movement of the slack adjustment cylinder (26) .
Inventors:
Kasumi Isogai
Inamoto Akira
Minoru Ito
Seiji Seki
Inamoto Akira
Minoru Ito
Seiji Seki
Application Number:
JP2022511731A
Publication Date:
November 07, 2022
Filing Date:
March 09, 2021
Export Citation:
Assignee:
Hitachi Construction Machinery Co., Ltd.
International Classes:
E02F3/413; E02F3/47
Domestic Patent References:
| JP5736373B2 | ||||
| JP52131602A | ||||
| JP56159434A | ||||
| JP58176157U | ||||
| JP52108602A |
Attorney, Agent or Firm:
Patent Attorney Corporation Hirowa Patent Office
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