EP 0812797 A1 19971217 - BOOM STORING AND EXTENDING DEVICE FOR CRANE
Title (en)
BOOM STORING AND EXTENDING DEVICE FOR CRANE
Title (de)
VORRICHTUNG ZUM STRECKEN UND ZUSAMMENLEGEN EINES KRANAUSLEGERS
Title (fr)
DISPOSITIF DE REPLOIEMENT ET DE DEPLOIEMENT DE FLECHE DESTINE A UNE GRUE
Publication
Application
Priority
- JP 31841593 A 19931217
- JP 9500335 W 19950302
Abstract (en)
A device for improving safety during operations of storing or extending a boom of a crane. A corresponding relationship between a boom hoisting angle (θ) and a length of rope (s) is beforehand set when an attitude of a boom (4) shifts from a working attitude (A) to a working attitude (B). Means (14) for detecting a boom hoisting angle detects a current boom hoisting angle (θ), and means (18) for detecting a current length of rope detects a length of rope (s). On the basis of the current boom hoisting angle detected by the boom hoisting angle detecting means (14), and the current length of rope (s) detected by the rope length detecting means (18), a boom drive device and a winch drive device are drivingly controlled so that a boom hoisting angle and a length of rope are equal to the set boom hoisting angle (θp) and a length of rope (sp), respectively. <IMAGE>
IPC 1-7
IPC 8 full level
B66C 23/06 (2006.01); B66C 23/82 (2006.01); B66C 23/88 (2006.01)
CPC (source: EP)
B66C 13/20 (2013.01); B66C 23/82 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0812797 A1 19971217; EP 0812797 A4 20000315; JP H07172775 A 19950711; TW 329793 U 19980411; WO 9626883 A1 19960906
DOCDB simple family (application)
EP 95910728 A 19950302; JP 31841593 A 19931217; JP 9500335 W 19950302; TW 85213565 U 19950209