JPS61127189U - - Google Patents
Info
- Publication number
- JPS61127189U JPS61127189U JP745185U JP745185U JPS61127189U JP S61127189 U JPS61127189 U JP S61127189U JP 745185 U JP745185 U JP 745185U JP 745185 U JP745185 U JP 745185U JP S61127189 U JPS61127189 U JP S61127189U
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- jib
- oil
- fixed
- backstop
- 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
- 230000008602 contraction Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Jib Cranes (AREA)
Description
第１図は本考案の実施例を示す側面図、第２図
は同バツクストツプシリンダの油吸排回路の構成
図、第３図イは補ジブ可動式のジブクレーンの一
般的構成を示す側面図、ロは同クレーンの組立段
階を示す部分側面図、第４図は補ジブ固定式のジ
ブクレーンの一般的構成を示す側面図である。
Ｂ……主ジブ、Ｃ１……可動補ジブ、Ｃ２……
固定補ジブ、Ｄ２，Ｄ３……固定ストラツト、１
……バツクストツプシリンダ、１１……同シリン
ダの伸び側室、１２……同縮み側室、２……油タ
ンク、３……シリンダ伸び側管路、４……同縮み
側管路、５……リリーフ弁、６……チエツク弁、
７……コツク。
Fig. 1 is a side view showing an embodiment of the present invention, Fig. 2 is a configuration diagram of the oil suction and exhaust circuit of the backstop cylinder, and Fig. 3A is a side view showing the general configuration of a jib crane with a movable auxiliary jib. , B are partial side views showing the assembly stage of the same crane, and FIG. 4 is a side view showing the general configuration of a jib crane with a fixed auxiliary jib. B...Main jib, C1 ...Movable auxiliary jib, C2 ...
Fixed auxiliary jib, D 2 , D 3 ...Fixed strut, 1
...back stop cylinder, 11... extension side chamber of the same cylinder, 12... same contraction side chamber, 2... oil tank, 3... cylinder extension side pipe line, 4... same contraction side pipe line, 5...... Relief valve, 6...check valve,
7...Kotuku.
Claims (1)
、該補ジブを支持する固定ストラツトとを備えた
ジブクレーンにおいて、上記固定ストラツトと主
ジブとの間、または上記固定補ジブと固定ストラ
ツトとの間に取付けられたバツクストツプシリン
ダと、該シリンダに作用する軸方向荷重による同
シリンダの内圧変化に応じて油を自動的に吸排さ
せる油吸排回路とから成り、この油吸排回路は、
バツクストツプシリンダの近傍部に設置された油
タンクと、該油タンクとバツクストツプシリンダ
の伸び側室および縮み側室とを接続する伸び側お
よび縮み側管路と、シリンダ伸び側室の最高圧力
を設定するリリーフ弁と、油タンクからシリンダ
伸び側室に向かう油の流れを許容しその逆の流れ
は阻止するチエツク弁と、必要に応じ該チエツク
弁をバイパスしてシリンダ伸び側室の油を油タン
クに逃がすためのコツクとを具備してなることを
特徴とするジブクレーンの固定ストラツトまたは
固定補ジブ用バツクストツプ装置。 In a jib crane equipped with a movable auxiliary jib or a fixed auxiliary jib on the top of the main jib, and a fixed strut supporting the auxiliary jib, between the fixed strut and the main jib, or between the fixed auxiliary jib and the fixed strut. It consists of a backstop cylinder attached to the cylinder, and an oil suction and drainage circuit that automatically sucks and discharges oil in response to changes in the internal pressure of the cylinder due to the axial load acting on the cylinder.
Set the oil tank installed near the backstop cylinder, the extension and contraction side pipes that connect the oil tank and the extension and contraction side chambers of the backstop cylinder, and the maximum pressure of the cylinder extension side chamber. a relief valve that allows oil to flow from the oil tank to the cylinder expansion side chamber but prevents the opposite flow; and a check valve that bypasses the check valve as necessary to allow oil in the cylinder expansion side chamber to escape to the oil tank. 1. A backstop device for a fixed strut or fixed auxiliary jib of a jib crane, characterized in that it is equipped with a stop for fixing the jib.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP745185U JPH0249277Y2 (en) | 1985-01-22 | 1985-01-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP745185U JPH0249277Y2 (en) | 1985-01-22 | 1985-01-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61127189U true JPS61127189U (en) | 1986-08-09 |
| JPH0249277Y2 JPH0249277Y2 (en) | 1990-12-25 |
Family
ID=30485815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP745185U Expired JPH0249277Y2 (en) | 1985-01-22 | 1985-01-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0249277Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010241604A (en) * | 2009-03-31 | 2010-10-28 | Manitowoc Crane Companies Llc | Folding jib main strut, and transportable reeved strut cap |
| JP2019006560A (en) * | 2017-06-26 | 2019-01-17 | コベルコ建機株式会社 | Jib mooring method and jib mooring device |
-
1985
- 1985-01-22 JP JP745185U patent/JPH0249277Y2/ja not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010241604A (en) * | 2009-03-31 | 2010-10-28 | Manitowoc Crane Companies Llc | Folding jib main strut, and transportable reeved strut cap |
| US8839966B2 (en) | 2009-03-31 | 2014-09-23 | Manitowoc Crane Companies, Llc | Folding jib main strut and transportable reeved strut caps |
| JP2019006560A (en) * | 2017-06-26 | 2019-01-17 | コベルコ建機株式会社 | Jib mooring method and jib mooring device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0249277Y2 (en) | 1990-12-25 |