JPH0312887U - - Google Patents
Info
- Publication number
- JPH0312887U JPH0312887U JP7250289U JP7250289U JPH0312887U JP H0312887 U JPH0312887 U JP H0312887U JP 7250289 U JP7250289 U JP 7250289U JP 7250289 U JP7250289 U JP 7250289U JP H0312887 U JPH0312887 U JP H0312887U
- Authority
- JP
- Japan
- Prior art keywords
- jib
- jib body
- sides
- boom
- box
- 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)
Description
第１図は本考案の実施例にかかるジブ起伏装置
を採用しているジブ付ブームを搭載した移動式ク
レーンの側面図、第２図は第１図の一部拡大図、
第３図は第２図の矢視図、第４図は第３図の
−断面図、第５図は第３図の−断面図、第
６図は公知のジブ付ブームの側面図、第７図は第
６図の平面図である。
１……ブーム、２……ジブ、３……テンシヨン
装置、４……二重箱、５……駆動装置（油圧シリ
ンダ）、１１……ブーム先端部、１２……支軸、
２１……ジブ本体、２１ａ……ジブ本体基端部、
３１……テンシヨン部材、４１……外箱、４４…
…内箱。
Fig. 1 is a side view of a mobile crane equipped with a jib-equipped boom that employs a jib hoisting device according to an embodiment of the present invention; Fig. 2 is a partially enlarged view of Fig. 1;
3 is a view taken in the direction of the arrows in FIG. 2, FIG. 4 is a cross-sectional view in FIG. 3, FIG. 5 is a cross-sectional view in FIG. 3, and FIG. 6 is a side view of a known boom with jib. FIG. 7 is a plan view of FIG. 6. 1... Boom, 2... Jib, 3... Tension device, 4... Double box, 5... Drive device (hydraulic cylinder), 11... Boom tip, 12... Support shaft,
21...Jib main body, 21a...Jib main body base end,
31...Tension member, 41...Outer box, 44...
...Inner box.
Claims (1)
基端部両側を該ジブ本体２１が起伏自在なる如く
して枢支し、さらに前記ブーム先端部１１の上部
両側と前記ジブ本体２１の先端寄り適所との間に
テンシヨン装置３を介設してなるジブ付ブームに
おいて、前記ジブ本体２１の先端寄り上面に、外
箱４１内に内箱４４をスライド自在に収容してな
る二重箱４を前記内箱４４がジブ本体長さ方向に
スライド可能なる如くして取付ける一方、前記ブ
ーム先端部１１の上部両側と前記内箱４４との間
に左右一対のテンシヨン部材３１，３１を介設す
るとともに、前記ジブ本体２１、前記内箱４４を
外箱４１に対してジブ本体長さ方向にスライドせ
しめる駆動装置５を設置していることを特徴とす
るジブ付ブームにおけるジブ起伏装置。 Both sides of the base end of the jib body 21 are pivoted on both sides of the lower part of the boom tip part 11 so that the jib body 21 can be raised and lowered, and furthermore, both sides of the upper part of the boom tip part 11 and appropriate positions near the tip of the jib body 21 are supported on both sides of the lower part of the boom tip part 11. In a boom with a jib, in which a tension device 3 is interposed between the jib body 21 and the upper surface of the jib body 21 near the tip, a double box 4 in which an inner box 44 is slidably housed in an outer box 41 is placed between the inner box 41 and the inner box 41. While the box 44 is attached so as to be slidable in the longitudinal direction of the jib body, a pair of left and right tension members 31, 31 are interposed between both upper sides of the boom tip 11 and the inner box 44, and A jib hoisting device for a boom with a jib, characterized in that a drive device 5 for sliding the jib body 21 and the inner box 44 relative to the outer box 41 in the lengthwise direction of the jib body is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989072502U JP2508070Y2 (en) | 1989-06-20 | 1989-06-20 | Jib undulating device in boom with jib |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989072502U JP2508070Y2 (en) | 1989-06-20 | 1989-06-20 | Jib undulating device in boom with jib |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0312887U true JPH0312887U (en) | 1991-02-08 |
| JP2508070Y2 JP2508070Y2 (en) | 1996-08-21 |
Family
ID=31610491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989072502U Expired - Fee Related JP2508070Y2 (en) | 1989-06-20 | 1989-06-20 | Jib undulating device in boom with jib |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2508070Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS648882U (en) * | 1987-07-07 | 1989-01-18 |
-
1989
- 1989-06-20 JP JP1989072502U patent/JP2508070Y2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS648882U (en) * | 1987-07-07 | 1989-01-18 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2508070Y2 (en) | 1996-08-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |