JPS6246895A - Automation system of scrap carrying crane - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to an automation system for a scrap transport crane.

BACKGROUND ART As shown in FIG. 1, in a scrap transport crane used in an electric furnace 1 of a steelworks, an operator uses a manually operated scrap transport crane 4 to move scraps A to F piled up by grade. The required amount is sucked up using a lifting magnet and placed in a scrap packet on the traverser 3.

Problems to be Solved by the Invention With such a scrap conveying crane, as shown in the figure, it is necessary to accurately feed a predetermined amount of scrap piled up at several locations into scrap packets, and the operator must use the weight installed on the traverser 3. Work was carried out while visually checking the weight on the display meter of the measuring device.

In addition, scrap carrying cranes usually have an abnormally high operating rate, and repeating the above-mentioned work under poor environmental conditions forces the operator to perform harsh work.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an automation system for a scrap conveying crane that can free the operator from harsh work and a dusty working environment and can make the work unmanned.

Structure of the Invention The scrap conveyance crane automation system according to the present invention sets scrap input data for each grade of scrap in advance in memory, installs a traverser load cell on the traverser that outputs scrap weight data, and transfers these scraps. The traverser control unit that has read the loading data and scrap weight data performs traverse control of the traverser, and also inputs the scrap weight data and scrap loading data via the traverser control unit to perform suction and control of the lifting magnet installed on the crane. It is characterized in that it is equipped with a crane control unit that controls the release amount, and is configured to control scrap suction by the lifting magnet and release control of the lifting magnet when loading scrap into a packet based on information from the traverser side.

Embodiments The following will explain the embodiments shown in the drawings. FIG. 2 shows a control block diagram when the system of the present invention is applied to the scrap transport crane having the electric furnace 1 shown in FIG. 1.

Here, the scrap packet provided in the traverser 3 is provided with a traverser load cell 10 for measuring the weight of scrap thrown in, and outputs the scrap weight data to the traverser control section 7 provided separately.

This traverser control unit 7 is provided with a memory 11, and in this memory 11, the types of A to F of the scraps 5, the amount of each, the order of input for each type of scrap, etc. are registered as several types of patterns. has been done.

The scrap transport crane 4 is equipped with a lifting magnet 8, and the amount of suction and release is controlled by the crane control section 6. This scrap transport crane 4 also has a crane load cell 9 that measures the hoisted scrap load and outputs scrap weight data to the crane control section 6.
is provided.

Here, the crane control section 6 and the traverser control section 7 are connected so that data exchange (signal transmission) is possible in both directions.

The crane control unit 6 controls the suction and
When controlling the release amount, control is performed according to scrap weight data of the traverser load cell 10 inputted via the traverser control section 7 and scrap input data set in the memory 11.

During such control, data from a load cell 10 installed in the truck and parser 3 is used to improve reliability. Therefore, the load cell on the scrap transport crane 4 side is used for the purpose of grasping the approximate weight, and for detecting landing and lifting of the lifting magnet 8.

In the above configuration, when using this system,
Scrap types, scrap amounts, and input order patterns for each scrap type are set in advance in the memory 11 as shown below.

Scrap A Weight x1 Input order CX2 ↓ B xsD
The X4 crane control unit 6 receives data from the traverser control unit 7 from the memory 1.
1, the lifting magnet 8 of the scrap transport crane 4 is moved to the prescribed stacking position of the scrap 5, and an excitation current corresponding to the weights X1 to X4 of each grade A-D is output, Controls the suction amount of scrap.

When loading scrap into the packets provided on the traverser 6 for each grade A to D, the release amount of the lifting magnet 8 is controlled based on the scrap weight data of the traverser load cell 9, and the scrap is actually input into the scrap packet. It is possible to accurately check the scrap that has been removed.

Here, the traverser load cell 10 measures the total amount, and in the above pattern example, the scrap of A is
1 into the scrap packet, the next step is to put the scrap C into the traverser load cell 10.
Input until the data becomes weight XI + X2, and do the same for the following steps. Further, the crane load cell 9 is used to roughly confirm the weight of scrap and to detect landing and lifting of the lifting magnet 8.

The attraction and release control (excitation current control) of the lifting magnet is patterned according to the grade of scrap and the required lifting amount (suction amount). In addition, the above pattern can be checked and corrected by checking the lifting magnet excitation current and the weight of scrap input into the scrap packet (the amount of input in LM per one time) for each scrap grade during actual operation. be.

Data can be set in the memory 11 by setting a plurality of patterns in advance and selecting one appropriate pattern at the time of work, or by keying in each time.

Effects of the Invention The embodiment of the automation system for a scrap conveying crane according to the present invention is as described above, and can bring about the following effects.

By checking the amount of scrap actually put into the scrap packet using a load cell installed on the traverser side of the scrap conveying crane and controlling the amount of suction and release of the lifting magnet, it is possible to make the scrap conveying crane unmanned.

[Brief explanation of the drawing]

FIG. 1 is an overall schematic diagram of a scrap transport crane to which the system of the present invention is applied, and FIG. 2 is a control block diagram. 1. Electric furnace, 2. Scrap charging crane, 3e.
Traverser, 4... Scrap transport crane, 5... Scrap, 6... Crane control unit, 7... Traverser control unit, 8... Lifting magnet, 9... Crane load cell, 10... Traverser load cell, 11...
memory.

Claims (1)

[Scope of Claims] In a scrap transport crane that loads and transports a predetermined amount of scrap for each predetermined grade onto a traverser using a crane from a scrap warehouse storing scraps of various grades, the transport amount for each scrap of each grade is determined in advance. a traverser load cell installed in the traverser to measure the weight of scrap loaded onto the traverser and output scrap weight data; and the scrap input data from the memory. and a traverser control unit that inputs the scrap weight data from the traverser load cell and performs traverse control of the traverser; and a traverser control unit that inputs the scrap weight data and scrap input data through the traverser control unit and controls the lift installed on the crane. This is an automation system for a scrap transport crane equipped with a crane control unit that controls the amount of suction and release of taking magnets.