JPH01129194U

JPH01129194U -

Info

Publication number: JPH01129194U
Application number: JP2562588U
Authority: JP
Priority date: 1988-02-26
Filing date: 1988-02-26
Publication date: 1989-09-04
Anticipated expiration: 2003-02-26
Also published as: JP2529593Y2

Description

[Brief explanation of the drawing]

第１図は本考案の実施例にかかる安全装置全体
の構成を示すブロツク構成図、第２図は同装置の
作用を説明するためのフローチヤート、第３図イ
，ロは同装置による制御方式を説明するためにア
ウトリガ張出し状態でのクレーン作業状況を模式
的に示す図である。１……クレーン車体、２……ブーム、３，４，
５，６……アウトリガ、７……過負荷検出部、８
……同検出部のブーム長さ検出器、９……同ブー
ム起伏角度検出器、１０……同実荷重検出器、１
２……同過負荷演算器、１３……ブーム位置検出
手段および転倒支点位置検出手段ならびに旋回停
止制御手段としての旋回停止制御部、１４……ア
ウトリガ長さ検出器、１５……ブーム位置検出の
ためのブーム旋回角度検出器、１６……ブーム旋
回方向検出手段としての左旋回検出スイツチ、１
７……同右旋回検出スイツチ、１８……旋回停止
バルブソレノイド。 Fig. 1 is a block diagram showing the overall configuration of the safety device according to an embodiment of the present invention, Fig. 2 is a flowchart for explaining the operation of the device, and Fig. 3 A and B are control methods by the device. FIG. 2 is a diagram schematically showing a crane work situation with outriggers extended to explain the above. 1...Crane body, 2...Boom, 3, 4,
5, 6...Outrigger, 7...Overload detection section, 8
...Boom length detector of the same detection section, 9...Boom hoisting angle detector, 10...Actual load detector, 1
2... overload calculator, 13... boom position detection means, overturning fulcrum position detection means, and swing stop control unit as swing stop control means, 14... outrigger length detector, 15... boom position detection boom rotation angle detector, 16... left rotation detection switch as means for detecting boom rotation direction, 1
7...Right rotation detection switch, 18...Turn stop valve solenoid.

Claims

[Scope of utility model registration request]

In a crane equipped with a revolving body equipped with a boom and a plurality of outriggers, a boom position detection means detects the position of the boom in the rotation direction, and an outrigger length detection means detects the overhang length of each of the outriggers. , overturning fulcrum position detection means for detecting the position of the overturning fulcrum in each direction based on the outrigger length detected by the outrigger length detection means; and overload detection means for detecting whether the suspended load is overloaded. , a turning direction detecting means for detecting the turning direction of the boom, and stopping turning of the boom in a direction in which the overturning moment increases based on each output from the turning direction detecting means, the boom position detecting means, and the overturning position detecting means. 1. A safety device for a crane, comprising: swing stop control means for outputting a command to a swing drive system.