JPS5983876U

JPS5983876U - crane

Info

Publication number: JPS5983876U
Application number: JP17903882U
Authority: JP
Inventors: 大久保　欣昭
Original assignee: 三菱重工業株式会社
Priority date: 1982-11-29
Filing date: 1982-11-29
Publication date: 1984-06-06

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 the drawing]

第１図は本案に係るクレーンの一実施例を示す側面図、
第２図は内外ブームの対向端部にそれぞれ設けた複数の
滑車と中折用ウィンチから延びたロープとの関係を示す
斜視図である。１・・・外側ブーム、２・・・内側ブーム、３・・・支
持構造体、４０〜４ｆ・・・滑車、５・・・中折用ウィ
ンチ側のロープ、６・・・中折用ウィンチ、７°９．８
・・・枢着点、９・・・起伏用ウィンチ、１０・・・起
伏用ウィンチ側のロープ。FIG. 1 is a side view showing an embodiment of the crane according to the present proposal;
FIG. 2 is a perspective view showing the relationship between a plurality of pulleys provided at opposite ends of the inner and outer booms and a rope extending from the center-folding winch. DESCRIPTION OF SYMBOLS 1... Outer boom, 2... Inner boom, 3... Support structure, 40-4f... Pulley, 5... Rope on the center folding winch side, 6... Center folding winch , 7°9.8
... Pivot point, 9... Lifting winch, 10... Rope on the side of the hoisting winch.

Claims

[Scope of utility model registration request]

a support structure, an inner boom that is directly pivoted to the support structure so that it can rotate in a vertical plane, an outer boom that is directly pivoted to the inner boom so that it can rotate in a vertical plane, and the inner boom. A hoisting winch for raising and lowering the inner boom, a plurality of pulleys installed at opposite ends of the inner and outer booms, and a rope attached to each of the pulleys to raise and lower the inner boom A crane characterized in that it is equipped with a center-folding winch that holds the outer boom in a substantially horizontal state by operating the inner boom to extend it at times and to rewind it when the inner boom is toppled.