JPS6232086U

JPS6232086U -

Info

Publication number: JPS6232086U
Application number: JP12371385U
Authority: JP
Priority date: 1985-08-12
Filing date: 1985-08-12
Publication date: 1987-02-25

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例の説明図、第２図は
第１図で示した装置の制御回路のブロツク図であ
る。２はジブ角度検出器、３は荷重検出器、５はワ
イヤロープ、７はロープ巻出長さ検出器、９は許
容荷重演算器、１０はフツク基準降下長さ演算器
、１３は荷、１４は仮想荷重演算器、１５は比較
器、１６はロープ単位長さ自重設定器、１７は降
下下限設定器、ｌ_０は基準長さ、ｌＦは最大降下
長さ、ｌは巻出ロープ長、θはジブ角度、Ｌ_０は
基準位置、ＬＢはクレーン位置、ＬＦは降下下限
位置、Ｌは吊り点、Ｗ_ａは許容荷重、Ｗ_０は荷の
荷重、Ｗは実測荷重、Ｗ′は仮想荷重、γは単位
ロープ自重を示す。 FIG. 1 is an explanatory diagram of an embodiment of the present invention, and FIG. 2 is a block diagram of a control circuit of the apparatus shown in FIG. 2 is a jib angle detector, 3 is a load detector, 5 is a wire rope, 7 is a rope unwinding length detector, 9 is an allowable load calculator, 10 is a hook standard descent length calculator, 13 is a load, 14 is a virtual load calculator, 15 is a comparator, 16 is a rope unit length weight setter, 17 is a drop lower limit setter, _l0 is the reference length, lF is the maximum drop length, l is the unwinding rope length, θ is the jib angle, L ₀ is the reference position, LB is the crane position, LF is the lower limit position, L is the suspension point, W _a is the allowable load, W ₀ is the load load, W is the measured load, W' is the virtual load, γ indicates the weight of the unit rope.

Claims

[Scope of utility model registration request]

A jib angle detector that detects the jib angle, a lower lower limit setter that sets the lower limit position of the load, and a hook reference that calculates the standard length of the hook and the standard lowering length of the hook from the jib angle and the lower limit position of the load. The descending length calculator, the reference length of the hook, the reference descending length of the hook, the rope unit length and weight set by the wire rope weight unit length weight setting device, and the hanging point detected by the rope unwinding length detector. a virtual load calculator that calculates a virtual load on the load and the wire rope when the load is lowered to the lower limit position from the rope unwinding length and the load on the load and the wire rope at the hanging point detected by the load detector; , Comparison of the virtual load calculated by the virtual load calculator and the allowable load calculated by the allowable load calculator from the jib angle, and when the virtual load exceeds the allowable load, a warning signal and an automatic stop signal are issued. A load detection device for a crane, etc., characterized in that it is composed of a device and a device.