JPS60173595U

JPS60173595U - Backstop for preventing crane boom from tilting

Info

Publication number: JPS60173595U
Application number: JP6057384U
Authority: JP
Inventors: 徳夫村手
Original assignee: 日本車輌製造株式会社
Priority date: 1984-04-24
Filing date: 1984-04-24
Publication date: 1985-11-16

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図乃至第４図は本考案に係るクレーンブームのあお
り止め用バックストップの一実施例を示すもので、第１
図は内筒に複数個の係止孔を設けた状態を示す正面図、
第２図はストッパの斜視図、第３図はストッパを通常の
位置に係止したバックストップの断面図、第４図はスト
ッパの係止位置を変えたバックストップの断面図、第５
図はクローラクレーンの正面図、第６図は従来のバック
ストップの断面図、第７図は従来のバックストップにお
いて内筒が外筒に最大に嵌入した状態を示す断面図であ
る。１はクレーン本体、２はブーム、３は巻上げ下ラム、４
はワイヤロープ、５は中間滑車、６はペンダントロープ
、７は巻上げドラム、８はワイヤーロープ、９はシーブ
、１０はフックグリップ、１　　　　。１はバックストップ、２０はブラケット、２１は外筒、
２２はバネ受、２３はクッション用スプリング、２４は
内筒、２５はブラケット、２６，２７．２８は係止孔、
２９はストッパ、３０は係止ピンである。Figures 1 to 4 show one embodiment of a backstop for preventing tilting of a crane boom according to the present invention.
The figure is a front view showing a state in which multiple locking holes are provided in the inner cylinder.
Fig. 2 is a perspective view of the stopper, Fig. 3 is a sectional view of the backstop with the stopper locked in the normal position, Fig. 4 is a sectional view of the backstop with the stopper locked in a different position, and Fig. 5 is a sectional view of the backstop with the stopper locked in a different position.
6 is a sectional view of a conventional backstop, and FIG. 7 is a sectional view of the conventional backstop showing a state in which the inner cylinder is fully fitted into the outer cylinder. 1 is the crane body, 2 is the boom, 3 is the hoisting lower ram, 4
is a wire rope, 5 is an intermediate pulley, 6 is a pendant rope, 7 is a hoisting drum, 8 is a wire rope, 9 is a sheave, 10 is a hook grip, 1. 1 is the backstop, 20 is the bracket, 21 is the outer cylinder,
22 is a spring receiver, 23 is a cushion spring, 24 is an inner cylinder, 25 is a bracket, 26, 27 and 28 are locking holes,
29 is a stopper, and 30 is a locking pin.

Claims

[Scope of utility model registration request]

One end of the inner cylinder is slidably fitted inside the outer cylinder whose one end is attached to the crane body, the other end of the inner cylinder is attached to the boom, and the other end of the inner cylinder is attached to the spring receiver fixed to the other end of the outer cylinder. In a backstop for preventing tilting of a crane boom, which has a cushion spring disposed between the end and the end of the crane boom, a stopper that is fitted and locked in the inner cylinder and that the tip of the cushion spring abuts, and a locking hole of the stopper are provided. A backstop for preventing tilting of a crane boom, which is characterized by having multiple pieces installed in multiple stages on the inner cylinder.