JPS5449748A - Streching device for multi-stage telescopic boom - Google Patents

Streching device for multi-stage telescopic boom

Info

Publication number
JPS5449748A
JPS5449748A JP11545277A JP11545277A JPS5449748A JP S5449748 A JPS5449748 A JP S5449748A JP 11545277 A JP11545277 A JP 11545277A JP 11545277 A JP11545277 A JP 11545277A JP S5449748 A JPS5449748 A JP S5449748A
Authority
JP
Japan
Prior art keywords
boom
cylinder
pin
stage telescopic
telescopic boom
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.)
Granted
Application number
JP11545277A
Other languages
Japanese (ja)
Other versions
JPS606878B2 (en
Inventor
Daijiro Sano
Original Assignee
Shin Meiwa Ind 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 Shin Meiwa Ind Co Ltd filed Critical Shin Meiwa Ind Co Ltd
Priority to JP11545277A priority Critical patent/JPS606878B2/ja
Publication of JPS5449748A publication Critical patent/JPS5449748A/en
Publication of JPS606878B2 publication Critical patent/JPS606878B2/ja
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To reduce the size of the device through streitching of a multi-stage telescopic boom with the action of a sihgle stretching cylinder by taking out and pulling in of a connecting pin and engaging or disengaging of a stopper piece of a stopper holding means with retaining means.
CONSTITUTION: When streitching a multi-stage telescopic as reduced to its maimum, first a cylinder 11 and th third boom 4 are connected by a connecting pin P through a connecting piece 7 while a nut 22 is engaged with a retaining member 25. Under such a condition, with the cylinder 11 stretched, the third boom alone can be streched. After with the connecting pin P taken out, the cylinder 11 is reduced, the tip of the cylinder 11 is connected with the second boom 3 by the connecting pin P through a connection piece 6. In this manner, as the cylinder 11 is stretched, the boom 3 extends. Likewise, the multi-telescopic boom can be extended to its maximum by stretching the first boom 2
COPYRIGHT: (C)1979,JPO&Japio
JP11545277A 1977-09-26 1977-09-26 Expired JPS606878B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11545277A JPS606878B2 (en) 1977-09-26 1977-09-26

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11545277A JPS606878B2 (en) 1977-09-26 1977-09-26

Publications (2)

Publication Number Publication Date
JPS5449748A true JPS5449748A (en) 1979-04-19
JPS606878B2 JPS606878B2 (en) 1985-02-21

Family

ID=14662891

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11545277A Expired JPS606878B2 (en) 1977-09-26 1977-09-26

Country Status (1)

Country Link
JP (1) JPS606878B2 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5637991A (en) * 1979-08-31 1981-04-11 Shin Meiwa Ind Co Ltd Expansion device in multistage boom
JPS5751696A (en) * 1980-08-13 1982-03-26 Kitsudee Inc Crane boom
US5865327A (en) * 1989-10-24 1999-02-02 J & R Engineering Co., Inc. Hydraulic boom for gantry and the like
US6685038B1 (en) 1999-10-15 2004-02-03 J & R Engineering Company, Inc. Extendible boom with locking mechanism having equalizer arrangement
JP2013082547A (en) * 2011-10-12 2013-05-09 Tadano Ltd Outrigger device
CN106185652A (en) * 2016-08-31 2016-12-07 北汽福田汽车股份有限公司 A kind of multi-stage expansion mechanism and engineering machinery
CN106219421A (en) * 2016-08-31 2016-12-14 北汽福田汽车股份有限公司 A kind of multi-stage expansion mechanism and engineering machinery
CN107082377A (en) * 2017-05-18 2017-08-22 南宁钛银科技有限公司 A kind of novel heavy duty mechanical-stretching equipment
CN107265316A (en) * 2017-06-26 2017-10-20 北汽福田汽车股份有限公司 Auxiliary, arm support and the equipment with arm support

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5637991A (en) * 1979-08-31 1981-04-11 Shin Meiwa Ind Co Ltd Expansion device in multistage boom
JPS5751696A (en) * 1980-08-13 1982-03-26 Kitsudee Inc Crane boom
JPS5751697A (en) * 1980-08-13 1982-03-26 Kitsudee Inc Crane boom
JPS6236960B2 (en) * 1980-08-13 1987-08-10 Kidei Inc
JPS6326077B2 (en) * 1980-08-13 1988-05-27 Kidei Inc
US5865327A (en) * 1989-10-24 1999-02-02 J & R Engineering Co., Inc. Hydraulic boom for gantry and the like
US6330951B1 (en) 1989-10-24 2001-12-18 J&R Engineering Company, Inc. Hydraulic boom for gantry or the like
US6685038B1 (en) 1999-10-15 2004-02-03 J & R Engineering Company, Inc. Extendible boom with locking mechanism having equalizer arrangement
JP2013082547A (en) * 2011-10-12 2013-05-09 Tadano Ltd Outrigger device
CN106185652A (en) * 2016-08-31 2016-12-07 北汽福田汽车股份有限公司 A kind of multi-stage expansion mechanism and engineering machinery
CN106219421A (en) * 2016-08-31 2016-12-14 北汽福田汽车股份有限公司 A kind of multi-stage expansion mechanism and engineering machinery
CN106219421B (en) * 2016-08-31 2018-11-20 北汽福田汽车股份有限公司 A kind of multi-stage expansion mechanism and engineering machinery
CN107082377A (en) * 2017-05-18 2017-08-22 南宁钛银科技有限公司 A kind of novel heavy duty mechanical-stretching equipment
CN107265316A (en) * 2017-06-26 2017-10-20 北汽福田汽车股份有限公司 Auxiliary, arm support and the equipment with arm support

Also Published As

Publication number Publication date
JPS606878B2 (en) 1985-02-21

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