JPS604113B2 - Lifting magnet for selectively lifting steel materials, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a method for selectively suspending steel materials, etc., which is used when simultaneously lifting a plurality of elongated steel materials, etc., or selectively lifting only one steel material, etc., from a large number of elongated steel materials, etc. arranged adjacently. The invention relates to lifting magnets for

When it is necessary to suspend any one piece or several adjacent pieces of steel materials such as billets, ingots, and other square steel pipes that are conventionally arranged closely in parallel, there are two types: one for hanging one piece and one for hanging many pieces. Either two types of IJ lifting magnets can be mounted on the crane and used depending on the number of steel materials required to be lifted, or two types of IJ lifting magnets, one for lifting one piece and one for lifting multiple pieces, can be used. is prepared, and is transferred to a crane each time the above-mentioned lifting operation is performed.

However, in the case of the above-mentioned steel lifting work, multiple lifting magnets are usually mounted on the same crane, so in the former method, the number of lifting magnets used is even larger (4 to IN range), which complicates the work.
When lifting a large number of objects, the lifting magnet used to lift one object may play around with the work, and at the same time, this can be inconvenient, such as interfering with the work. It requires time and manpower, has poor workability, and is labor intensive.

The present invention solves the above-mentioned conventional problems by providing a lifting magnet that has both functions of lifting a large number of objects and lifting only one object, and can be used for both operations. Examples will be described in detail with reference to the drawings.

1 to 6 and 10 show a first embodiment. In the figures, 1 denotes a main coil which is fitted into the central leg 3 of the E-shaped core 2. Both ends of each leg of the iron core 2 are made of non-magnetic material 6, 7 such as stainless steel to prevent unnecessary suspension of steel materials etc. due to unreasonable magnetic flux generated when excited by the lower selective suspension coils 4, 5. magnetically separated from other parts. That is, both ends of each leg of the iron core 2 are also used as magnetic poles for the selection suspension coils 4 and 5. The selective suspension coils 4 and 5 are fitted into the central legs 10 and 11 of the E-shaped cores 8 and 9, respectively. The E-type core 8 is integrally extended over one end of the E-type core 2, and the E-type core 9 is integrally extended over the other end of the same core 2. Both ends of each leg of the core 2 are connected to the main end. It is commonly used for the magnetic path of the magnetic flux generated by the coil and the selective suspension coils 4 and 5.

Reference numeral 12 denotes a terminal box that accommodates connection terminals for each coil and is attached to the upper surface of the iron core 2.

Reference numeral 13 denotes a hanger for hanging the lifting magnet onto a crane or the like, and is fixed to the upper surface of the iron cores 8 and 9.

The embodiment of the present invention is constructed as described above, and when a current is supplied to the main coil 1, all of the magnetic poles, which are the lower ends of the legs of the iron core 2, are magnetized. The lower end of the outer leg becomes the S pole (both shown in FIGS. 2 and 4), and as shown in FIG. 6, the entire steel material A can be suspended under the magnetic pole.

Further, when a current is supplied to only one or both of the selective suspension coils 4 and 5, a narrow magnetic pole at one end or the other end of each leg of the iron core 2 is magnetized.

That is, when current is supplied only to the selected suspension coil 4, the E-type iron core 8 belonging to this coil and one end of the leg of the iron core 2 carried to the leg of this iron core, that is, the non-magnetic plate 6 Magnetic flux was generated in the end portions, and as shown in FIG. 4, for example, the central magnetic pole became the north pole and each outer magnetic pole became the south pole, and similarly, current was supplied only to the other selected suspension coil 5. Sometimes, the E-shaped core 9 and the core 2 connected to the legs of this core are magnetized at the ends of the other non-magnetic plate 7, and if the central magnetic pole is the N pole (marked with N'), each outer Each magnetic pole becomes an S pole (denoted by S'). Note that when current is supplied to both selection suspension coils 4 and 5, the magnetic poles at both ends are magnetized to the same polarity as above. Therefore, by supplying current to only one of the selected suspension coils 4 or 5, the magnetic pole in the middle will be magnetized. For example, one steel material E-1 or E2 located at the end of steel material A shown in FIG. 6 can be lifted by placing the steel material A in FIG. In the case of this selective suspension, in the embodiment, both ends of the iron core 2 are separated by non-magnetic materials 6 and 7 corresponding to the steel material to be selectively suspended, so that the steel material adjacent to the steel material to be selectively suspended is separated. It is possible to prevent the magnetic attraction force from working and ensure that only the steel material to be lifted is reliably lifted.

In order to achieve the purpose of selective suspension, it is sufficient to provide only one coil for selective suspension, but if it is provided at both ends as in the example, it is possible to suspend the steel material located at the left or right end of the laid steel materials. It is convenient to be able to use both hanging coils for work.

In the embodiment, a case where the present invention is applied to a three-electrode glue-footing magnet has been described.
It is also possible to implement the present invention in a two-electrode glue-footing magnet as shown in the embodiment. Next, to explain the embodiment, the drawing is a schematic diagram showing only the coil and the core. In the figure, 14 and 15 are main coils which are respectively embedded in both legs of the U-shaped core 16.

17~20' U-shaped iron core 21, 2 with selected hanging coil
They are embedded in each leg of 2.

Each leg of the iron cores 21 and 22 is connected to an end of each leg of the iron core 16, respectively.

Reference numerals 23 and 24 are non-magnetic plates for preventing adhesion of adjacent steel materials other than the steel material to be selectively lifted due to leakage magnetic flux when the selection coils 17 to 20' are excited. It is rigidly interposed at a location that is a corresponding dimension inward from the end of the steel material to be selectively suspended, magnetically separating the end from the other parts.

The main part of the second embodiment is constructed as described above, and the main coil 14
, 15, all the magnetic poles are magnetized, so a large number of steel materials can be lifted out at the same time, and the selection coils 17, 1
When 8, 19, or 2 river currents are supplied, the magnetic poles directly under those coils, and therefore the magnetic poles inside the steel materials to be selected and suspended, are magnetized. can be lifted out.

As described above, according to the present invention, a type of lifting magnet can be used for lifting a large number of steel materials, or for lifting one or a very small number of steel materials, by simply selecting the coil to be supplied with power, that is, by simply switching the connection circuit of the coil. It can be used for both types of work, and there are no disadvantages such as a large number of magnets or idle magnets as in the conventional method of attaching the two types above to a crane, and it can be used for each different lifting work. There is no inconvenience of having to use different types of lifting magnets or changing the lifting magnet to the crane, and it saves time and manpower for scale changing work.Furthermore, when performing selective lifting with a lifting magnet designed specifically for multiple lifting, the work can be carried out easily. As a process, first, several objects, including a specific steel material to be lifted, are adsorbed and moved to another location, and then the steel material to be lifted is further moved to another location in order to position the steel material to be lifted at the end of this group of steel materials. After transferring it to the location, it is necessary to take the step of lifting only the target steel material at the end of the lifting magnet by attracting it to the end of the lifting magnet's magnetic pole. There is also a need to return the parts to their original locations, which is extremely laborious work and at the same time causes a large loss of time, but according to the present invention, this is not necessary and is extremely efficient.

[Brief explanation of the drawing]

1 to 6 and 10 show a first embodiment of the present invention, in which FIG. 1 is a front view, FIG. 2 is a side view, FIG. 3 is a plan view, and FIG. 4 is a Bottom view, Figure 5 is a sectional view taken along line A-A in Figure 1, Figure 6 is a sectional view taken along line B in Figure 2.
-B' is a sectional view, and FIG. 10 is a perspective view excluding the hanger. 7, 8, and 9 show the second embodiment; FIG. 7 is a front view, FIG. 8 is a side view, and FIG. 9 is a bottom view. 1, 14, 15...Main coil, 4, 5, 1
7, 18, 19, 20...Selective hanging coil. Figure 1 Figure 2 Tsutomu Figure 4 Figure 6 Little Brother Figure 6 Figure 7 Labor Figure 8 Tsutomu? figure hair 'o figure

Claims (1)

[Claims] 1 A main coil for magnetizing all the magnetic pole parts whose magnetic pole surfaces are aligned on the same plane, and a selective suspension coil for magnetizing a part of the magnetic pole part as a magnetic pole, and this selective suspension coil The magnetic pole part that is magnetized by the main coil is located at the end of all the magnetic pole parts, and this magnetic pole part and the magnetic pole part that is magnetized by the main coil are used for lifting a small number of objects to be lifted or for lifting a large number of objects. A lifting magnet for selectively suspending steel materials, etc., featuring the following.