JPS592776U

JPS592776U - Crane with foldable and extendable lattice boom

Info

Publication number: JPS592776U
Application number: JP9686082U
Authority: JP
Inventors: 井川　勝
Original assignee: 住友重機械工業株式会社
Priority date: 1982-06-28
Filing date: 1982-06-28
Publication date: 1984-01-09

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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は基端ブームを伸ばした状態のブームの平面図、
第２図は基端ブームを縮めた状態のブームの平面図、第
３図は基端ブームを縮めかつブームを折り畳んだ状態の
平面図、第４図および第５図は基端ブームの断面図で、
第４図は基端側を内筒とした例、第５図は基端側を外筒
とした例を示す、第６図は油圧回路図である。１・・・ブーム、２・・・・・・先端ブーム、３・・・
・・・基端ブーム、４・・・中間ブーム、５・・・連結
ピン、６・・・・・・外鋼管、７・・・・・・内鍋管、
８・・・・・・流体シリンダー、９・・・・・・連結ピ
ン、１０・・・・・・孔、１１・・・・・田ツク治具、
１２・・・・・・クレーン本体、１３・・・・・・取付
ピン、１４・・・・・・油圧ポンプ、１５・・・・・・
油圧切換バルブ、１６・・・・・・給・排通路、１７・
・・・・・オーバーロードリリーフバルブ、１８・・・
・・・リリーフバルブ、１９・曲・油タンク。Figure 1 is a plan view of the boom with the proximal boom extended;
Figure 2 is a plan view of the boom with the proximal boom retracted, Figure 3 is a plan view of the proximal boom with the boom retracted and the boom folded, and Figures 4 and 5 are cross-sectional views of the proximal boom. in,
FIG. 4 shows an example in which the proximal end side is an inner cylinder, FIG. 5 shows an example in which the proximal end side is an outer cylinder, and FIG. 6 is a hydraulic circuit diagram. 1...Boom, 2...Tip boom, 3...
... Base end boom, 4 ... Intermediate boom, 5 ... Connection pin, 6 ... Outer steel pipe, 7 ... Inner pot pipe,
8... Fluid cylinder, 9... Connection pin, 10... Hole, 11... Tatsuku jig,
12...Crane body, 13...Mounting pin, 14...Hydraulic pump, 15...
Hydraulic switching valve, 16... Supply/drain passage, 17.
...Overload relief valve, 18...
... Relief valve, 19, song, oil tank.

Claims

[Scope of utility model registration request]

A suitable number of intermediate booms can be connected between the tip boom and the base boom, or the tip boom of the boom or the intermediate boom and the base boom can be folded at the connection part, and the base boom has the boom extendable and retractable. A crane with a foldable and extendable lattice boom, characterized in that the crane is equipped with a locking jig that can hold the cylinder and the proximal boom in the fully extended and fully retracted states without applying a load to the cylinder.