JPS58172190A - Lifting magnet for selectively hanging steel material, etc. - 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] The present invention is used to simultaneously lift a plurality of long and thin steel materials or to selectively lift one or a very small number of long and thin steel materials arranged adjacent to each other. This invention relates to a lifting magnet for selecting the amount of steel, etc.

When it is necessary to extract one or more adjacent pieces of steel materials such as billets, ingots, or other square steel pipes that have traditionally been lined up closely in parallel, a single piece can be used for hanging. Either two types of lifting magnets for lifting large quantities are installed on the crane and used depending on the required number of steel materials to be lifted, or two types of lifting magnets for lifting one piece and one for lifting multiple pieces are used. Different kinds of lifting magnets are prepared, and these are hung on the crane each time the above-mentioned quick lifting work is carried out.

However, since multiple lifting magnets are usually mounted on the same crane for the above-mentioned steel part shedding work, the former method requires a larger number of lifting magnets (4 to 10)9 and complicates the work. Or, when working with multiple lbs, there are inconveniences such as a single lifting magnet being played with and getting in the way of the work, and in the latter case, it is necessary to use a lifting magnet exclusively for that work. Hanging it on a crane requires a lot of time and manpower to change it, making it difficult to work with, and it only takes 3 pages and the work is a blood test.

The present invention solves the above-mentioned conventional problems by providing a lifting magnet that has both functions of unloading a large number of pieces and lifting out only one piece, and can be used for both operations.The following describes the implementation of the lifting magnet according to the present invention. Examples will be described in detail with reference to the drawings. In the figure, 1 is an E-shaped fixed iron core, and each leg is represented as a magnetic pole. Reference numeral 2 and 3 denote movable iron cores that can be moved up and down while remaining in close contact with each end face of the fixed iron core 1, and each leg portion is a magnetic pole like the fixed iron core 1. 4 is a fixed iron core 1 and both movable iron cores 2.
A common excitation coil fitted into the central magnetic pole of 3, 5.5
' and 6.6' are support plates fixed to the coil cover of the excitation coil 4, and the support plate 5.5' and one end face of the fixed iron core 1 support one movable iron core 2, and the support plates 6, 6 ′
and the other end surface of the fixed iron core 1 support the other movable iron core 3.

8 and 8 are base plates fixed across the coil case of the excitation coil 4 and the upper surface of the fixed core 1 in a position to turn on the movable cores 2 and 1, respectively; 9 and 10 are on the base plates 5 and 8 respectively. Hydraulic cylinders 11 and 12 are mounted between the movable iron cores 2 and 3 and the base plates 7 and 8, respectively, by frames fixed to the upper surfaces of the movable iron cores 2 and 3, respectively. Reference numeral 13 denotes a terminal box that accommodates a power supply terminal for the excitation coil 4, and is provided on the upper surface of the fixed iron core l. Reference numeral 14 is a part for suspending the lifting magnet from a crane or the like, and is attached to the upper surface of a connecting frame 15 that is attached to the upper surface of both the coil case of the excitation coil 4 and the fixed iron core 1.

The embodiment of the present invention is constructed as described above, and when a desired one steel material is extracted from a large number of arranged steel materials by ILD, the hydraulic cylinder 1 is used.
1. Lower one or both of the movable cores 2 and 3 (FIG. 1 shows the state in which both movable cores are lowered) according to step 12, and place the magnetic pole part on the lower surface of the magnetic pole part of the fixed core 1. (Attraction surface) By protruding further and supplying current to the excitation coil 4 to magnetize each magnetic pole, the movable iron core 1
One piece of lumber corresponding to this magnetic pole l under the magnetic pole of can be drawn out by each magnetic pole part of the movable iron core. In this case, the electromagnetic poles including the magnetic poles of the fixed iron core 1 are magnetized, but the movable iron core 2, The protrusion amount of the lower end of No. 3 is set.

Note that in order to achieve the purpose of selection, it is possible to use only one of the movable iron cores 2 and 3, but if they are provided at both ends as in the embodiment, they can be placed on the left or right side of several rows of steel materials. It is convenient because each magnetic pole of both movable iron cores 2 and 3 can be used for quick extraction of the steel material to be extracted in a selected amount.

Next, when discharging a large number of steel materials at once, the movable iron core 2,
3 is raised by cylinders 11 and 12, and the attracting surface, which is the lower end surface of the magnetic pole of the movable iron core, is aligned with the attracting surface, which is the lower end surface of the magnetic pole of the fixed iron core 1, and current is supplied to the excitation coil to magnetize all the magnetic poles. In other words, the steel material under this magnetic pole, and therefore a large number of steel material openings, can be exposed at one time.

As described above, the present invention divides the iron core into a fixed iron core and a movable iron core, and creates a single magnet by simply winding a common excitation coil around a large number of screws and one or a very small number of screws around these iron cores. By simply changing the lifting and lowering position of the movable iron core, it can be used to quickly select a large number of items and to select the desired item. There are no disadvantages such as the magnet mounting method becoming complicated due to the large number of magnets or the presence of idle magnets, and
There is no inconvenience of having to hang different types of lifting magnets on the crane for each different Pυ removal work, and it saves time and manpower for changing the lifting magnets. Switching can be done extremely easily by remotely controlling the lifting and lowering of the movable iron core.Furthermore, when using a lifting magnet dedicated to mass cooling to dispense the selected amount, the work process first requires a specific speed change. Adsorb several pieces of steel including the steel material to be drawn out, move it to another location, and then remove the target material from this group of steel materials.
After moving several more steel materials to other locations in order to position the steel material at the extreme end, only the steel material at the end is attracted using the magnetic pole end of the lifting magnet and lifted out. It is necessary to go through a 7-page work step, and in this case, once the loaf has been started, it is also necessary to return the mixture other than the target preparation to its original place, and the work is extremely rotational. At the same time, the time loss is large, but according to the present invention, this is not necessary and is extremely efficient.

In addition, in the case of the present invention, since the movable VB pole can be used for multiple magnets instead of providing another magnetic pole, the area occupied by the bottom surface is the same as that of a conventional lifting magnet for multiple magnets, and does not increase.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a front view, FIG. 2 is a side view, and FIG. 3 is a plan view. 1...Fixed core 2, 3...Movable core 41/Exciting coil Applicant: Kobe Steel, Ltd. Shinko Electric Co., Ltd. Agent: Patent attorney Haruya Saito Figure 1

Claims (1)

[Claims] A fixed iron core having a wide magnetic pole, a movable iron core having a narrow magnetic pole and capable of being raised and lowered so that the magnetic pole attraction surface is flush with the magnetic pole attraction surface of the fixed iron core in a lifting position, and at least one magnetic pole of both of the iron cores. A common excitation coil is provided to surround the magnetic poles and magnetize each magnetic pole, and the magnetic poles of the movable core are made to protrude from or are flush with the magnetic poles of the fixed core, so that they can be used in selective amounts and in multiple parts. Lifting magnet for selective use of steel materials, etc., featuring: