JPH01126393U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is a block diagram of a crane cargo handling control system according to the present invention. FIG. 2 is a schematic diagram of a crane equipped with the cargo handling control device of the present invention. FIG. 3 is an enlarged schematic diagram of the main part of the tongs 12. FIG. 4 and FIG. 5 are schematic diagrams each showing the state of the coil 13 before it is lifted. FIG. 6 is a flowchart of the microcomputer 9. 9...Microcomputer (grasping start instruction means, low speed winding start instruction means, low speed winding end instruction means, high speed winding start instruction means), 200A, 200B...
Gripping sensor, 300A, 300B...hanging sensor.

Claims (1)

[Claims for Utility Model Registration] A gripping sensor installed on tongs for gripping and suspending an object to be transferred by a crane and detecting that the tongs have gripped the object; a hanging sensor that detects that the tongs have suspended the transferred object; a grasping start instruction means that instructs the tongs to start a grasping operation by inputting a predetermined hoisting start signal; low-speed hoisting start instruction means for commanding the start of low-speed hoisting of the tongs based on a grasping signal input from the grasping sensor when an object is grasped; low-speed hoisting end instructing means for instructing the end of the low-speed hoisting in response to a hanging signal given by the operator; and high-speed hoisting start instructing means for instructing the high-speed hoisting of the tongs after a predetermined period has elapsed since the end of the low-speed hoisting. A crane cargo handling control device characterized by having the following.