JPS5856791U

JPS5856791U - Crane boom hoisting device

Info

Publication number: JPS5856791U
Application number: JP14948981U
Authority: JP
Inventors: 肇田中
Original assignee: 株式会社日立製作所
Priority date: 1981-10-09
Filing date: 1981-10-09
Publication date: 1983-04-18

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図は従来のブーム起伏構造によるブーム起、　伏力
のベクトル図、第２図は従来の他のブーム起伏構造によ
るブーム起伏力のベクトル図、第３図は本考案の一実施
例によるブーム起伏構造によるブーム起伏力のベクトル
図、第４図は第１図に対、応する従来のブーム起伏構造
を備えるレツキングクレーン全体図、第５図は第２図に
対応する従来のブーム起伏構造を備えたレツキングクレ
ーン全体図、第６図は本考案の一実施例によるブーム起
伏構造を備えたレツキングクレーン全体図である。 −１・・・・・・旋回体、２・・・・・・走行倣３−−
−−−−アウトリガ−４＊＊＊・・・起伏ドラム、５・
・・・・・起伏シーブ、６・ｅｅｅ＊ｅ起伏ロープ、７
・…・・テンションバー、８…−・・ブーム、９・・・
・・・主フック、１０−・・・・・補フック、−１１・
・・・・・第１マスト、１２・・・・・・第１ペンダン
トロープ、１３−・・・・・第２マス−ト、１４・・・
・・・第２ペンダントロープ。Fig. 1 is a vector diagram of the boom hoisting and hoisting force with a conventional boom hoisting structure, Fig. 2 is a vector diagram of the boom hoisting force with another conventional boom hoisting structure, and Fig. 3 is a boom according to an embodiment of the present invention. A vector diagram of the boom hoisting force due to the hoisting structure. Fig. 4 is an overall view of a retsuking crane with a conventional boom hoisting structure corresponding to Fig. 1. Fig. 5 is a conventional boom hoisting structure corresponding to Fig. 2. FIG. 6 is an overall view of a wrecking crane equipped with a boom undulating structure according to an embodiment of the present invention. -1...Rotating body, 2...Traveling imitation 3--
-----Outrigger-4＊＊＊...undulating drum, 5.
... undulating sheave, 6・eee*e undulating rope, 7
...Tension bar, 8...--Boom, 9...
...Main hook, 10-...Auxiliary hook, -11.
...First mast, 12...First pendant rope, 13-...Second mast, 14...
...Second pendant rope.

Claims

[Scope of utility model registration request]

In a crane that has a pendant rope between the mast and the boom, and the mast and boom are simultaneously raised and lowered by manipulating the hoisting rope connected to the mast, the pendant rope is attached to the boom of another mast. A boom hoisting device for a crane, characterized in that the upper part of the other mast is connected to a portion of the boom closer to the tip than the other mast with another rope.