JPS5449748A - Streching device for multi-stage telescopic boom - Google Patents
Streching device for multi-stage telescopic boomInfo
- 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
- connecting 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
Links
Landscapes
- Jib Cranes (AREA)
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
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52115452A JPS606878B2 (en) | 1977-09-26 | 1977-09-26 | Boom extension device for multi-stage telescoping boom |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP52115452A JPS606878B2 (en) | 1977-09-26 | 1977-09-26 | Boom extension device for multi-stage telescoping boom |
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 |
---|---|---|---|
JP52115452A Expired JPS606878B2 (en) | 1977-09-26 | 1977-09-26 | Boom extension device for multi-stage telescoping boom |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS606878B2 (en) |
Cited By (9)
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 |
-
1977
- 1977-09-26 JP JP52115452A patent/JPS606878B2/en not_active Expired
Cited By (14)
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 | |
US6330951B1 (en) | 1989-10-24 | 2001-12-18 | J&R Engineering Company, Inc. | Hydraulic boom for gantry or the like |
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 |
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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