JPS62168092U

JPS62168092U -

Info

Publication number: JPS62168092U
Application number: JP5451786U
Authority: JP
Priority date: 1986-04-11
Filing date: 1986-04-11
Publication date: 1987-10-24

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す正面図、第２
図、第３図は第１図に示したブームの拡大図、作
用説明図、第４図、第５図は同ブームの変更例を
示す正面図、縦断面図、第６図は同ブームにおけ
る力及び曲げモーメントの作用状況を示す説明図
、第７図は従来の俯仰シリンダ支持式伸縮ブーム
を備えたクレーンの正面図、第８図は第７図に示
したブームの縦断面図、第９図、第１０図は同ブ
ームの変更例を示す縦断面図、横断面図、第１１
図は同ブームにおける力及び曲げモーメントの作
用状況を示す説明図、第１２図は従来のペンダン
ト支持式ラチスブームを備えたクレーンの正面図
である。１Ａ，１Ｂ……伸縮ブーム、２……ボトムセク
シヨン、３，３′，３″……中間セクシヨン、４
……トツプセクシヨン、５，６，６′，６″……
伸縮シリンダ、７，８，９，１０……シーブ、１
１……ペンダントロープ、１２……ブーム俯仰機
構、１３……ブライドル、１４……旋回フレーム
、１５……ロープ固定点。 Figure 1 is a front view showing one embodiment of the present invention;
Figure 3 is an enlarged view and action explanatory diagram of the boom shown in Figure 1, Figures 4 and 5 are front views and longitudinal cross-sectional views showing modified examples of the same boom, and Figure 6 is an enlarged view of the boom shown in Figure 1. An explanatory diagram showing the action status of force and bending moment, Fig. 7 is a front view of a crane equipped with a conventional elevating cylinder supported telescopic boom, Fig. 8 is a vertical sectional view of the boom shown in Fig. 7, Fig. 9 Figures 10 and 10 are longitudinal sectional views, cross sectional views, and 11th sectional views showing modified examples of the same boom.
The figure is an explanatory diagram showing the action of force and bending moment on the boom, and FIG. 12 is a front view of a crane equipped with a conventional pendant-supported lattice boom. 1A, 1B...Telescopic boom, 2...Bottom section, 3, 3', 3''...Middle section, 4
...Top section, 5, 6, 6', 6''...
Telescopic cylinder, 7, 8, 9, 10...sheave, 1
1...Pendant rope, 12...Boom elevation mechanism, 13...Bridle, 14...Swivel frame, 15...Rope fixing point.

Claims

[Scope of utility model registration request]

In a crane equipped with a telescopic boom that can be extended and retracted in multiple stages using a hydraulic cylinder, etc., a sheave is provided at both ends of each section of the boom other than the bottom section, and a pendant lobe is inserted into the upper sheave of each section and into the section. At the same time, one end of the pendant rope is attached to the upper end of the bottom section, and the boom is raised and raised via the pendant rope that exits the boom through the upper sheave of the top section. A crane with a pendant-supported telescopic boom, characterized in that it is possible to support it from the rear.