JPS622111B2 - - Google Patents

Info

Publication number
JPS622111B2
JPS622111B2 JP55185003A JP18500380A JPS622111B2 JP S622111 B2 JPS622111 B2 JP S622111B2 JP 55185003 A JP55185003 A JP 55185003A JP 18500380 A JP18500380 A JP 18500380A JP S622111 B2 JPS622111 B2 JP S622111B2
Authority
JP
Japan
Prior art keywords
suspension
control
load
bit
excavation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
JP55185003A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57112590A (en
Inventor
Hiroshi Kusumi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Construction Machinery Co Ltd
Original Assignee
Hitachi Construction Machinery Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Construction Machinery Co Ltd filed Critical Hitachi Construction Machinery Co Ltd
Priority to JP18500380A priority Critical patent/JPS57112590A/ja
Publication of JPS57112590A publication Critical patent/JPS57112590A/ja
Publication of JPS622111B2 publication Critical patent/JPS622111B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Earth Drilling (AREA)
JP18500380A 1980-12-27 1980-12-27 Automatic fall controller for excavating device of vertical hole excavator Granted JPS57112590A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18500380A JPS57112590A (en) 1980-12-27 1980-12-27 Automatic fall controller for excavating device of vertical hole excavator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18500380A JPS57112590A (en) 1980-12-27 1980-12-27 Automatic fall controller for excavating device of vertical hole excavator

Publications (2)

Publication Number Publication Date
JPS57112590A JPS57112590A (en) 1982-07-13
JPS622111B2 true JPS622111B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1987-01-17

Family

ID=16163070

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18500380A Granted JPS57112590A (en) 1980-12-27 1980-12-27 Automatic fall controller for excavating device of vertical hole excavator

Country Status (1)

Country Link
JP (1) JPS57112590A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009097313A (ja) * 2007-10-13 2009-05-07 Mandai Crane:Kk 削孔装置
JP5851774B2 (ja) * 2011-09-05 2016-02-03 東日本旅客鉄道株式会社 フィードストロークを変更可能な低空頭用掘削装置
JP6799253B2 (ja) * 2016-11-04 2020-12-16 ジャパンパイル株式会社 地盤の掘削方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5025404U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1973-06-29 1975-03-24
JPS5222691B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1974-06-21 1977-06-18

Also Published As

Publication number Publication date
JPS57112590A (en) 1982-07-13

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