JPS5968794U

JPS5968794U - Telescopic boom jib side holding device

Info

Publication number: JPS5968794U
Application number: JP16464582U
Authority: JP
Inventors: 三ツ谷　有史
Original assignee: 株式会社加藤製作所
Priority date: 1982-11-01
Filing date: 1982-11-01
Publication date: 1984-05-10
Also published as: JPS6141747Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図及び第２図は夫々本考案−実施例の概略を示す側
面図及び平面図、第３図はその作動時の側面図、第４図
及び第５図は夫々先端ブーム筒を省略して示す第３図の
Ｘ−Ｘ断面図及び側面図、　′第６図及び第７図は夫々
先端ブーム筒を省略して示す第３図のＹ−Ｙ断面図及び
側面図である。１・・・基部ブーム筒、２・・・先端ブーム筒、３・・
・自走式クレーンの車体、４・・・クレーン旋回台、６
・・・デリックシリンダ、９・・・水平軸、１０・・・
ジブ、１６・・・ピン、１７・・・腕状のブラケット、
２０・・・コンプレッションロッド、２９・・・横梁、
３０．　３１・・・リンク。矛２図 ■ ＋４．ａ−’−１５牙　３　図Figures 1 and 2 are a side view and a plan view showing the outline of the present invention-embodiment, respectively, Figure 3 is a side view when it is in operation, and Figures 4 and 5 each omit the tip boom tube. Figures 6 and 7 are a Y-Y sectional view and a side view of Figure 3, respectively, with the tip boom barrel omitted. 1...Base boom tube, 2...Tip boom tube, 3...
・Self-propelled crane body, 4...Crane swivel platform, 6
...Derrick cylinder, 9...Horizontal axis, 10...
Jib, 16...pin, 17...arm-shaped bracket,
20... Compression rod, 29... Cross beam,
30. 31...Link. Spear 2 illustration■ +4. a-'-1 5 tusk 3 figure

Claims

[Scope of utility model registration request]

Between the horizontal shaft provided at the bottom of the tip of the telescopic boom and the base end of the jib that is removably pivoted to the horizontal shaft, there is a jib in a lower holding position that is folded along the lower surface of the boom tube at the base of the telescopic boom. A means is provided that protrudes to the side of the base boom tube as it reaches its tip, and the distal end of the jib is placed between the tip of the jib in the lower hug position and the base of the base boom tube opposing this. A separable pivot part that can be rotated approximately 90 degrees is provided between the base boom tube and the horizontally held position along the side surface of the base boom tube, and between the base of the jib in the lowered position and the opposing tip of the base boom tube. A separate opening-type jib guide mechanism including a cross beam fixed to the jib and links connecting both ends of the cross beam to the side and bottom surfaces of the base boom barrel, respectively, is coupled to support the jib tip by the pivot portion. In a crane truck installed in such a way that the jib in the horizontal holding position is urged to return to the lower holding position by the action of gravity,
The vicinity of the pivot point of the jib and the crane swivel table below are separably connected by compression rods with universal joints or similar joints interposed at both ends, so that the telescopic boom can be folded down. A jib side-holding device for a telescopic boom, characterized in that the compression rod forms a moment arm whose rotation center is the pivot portion so as to rotate the jib from a lower-holding position to a side-holding position.