JPS58162B2 - electromagnet - Google Patents

Description

[Detailed description of the invention] The present invention relates to an electromagnet for light loads.

An electromagnet has a magnetic coil attached to a soft iron core formed by casting or a similar method, and the magnetic pole surface has the required cross-sectional area in order to effectively utilize the magnetic force of the magnetic coil. .

However, the type of conventional electromagnets is the same even for light-load electromagnets that attract thin plates, so even electromagnets used for attracting light objects are heavy and cannot be carried anywhere, resulting in high costs. It was inevitable that it would happen.

In view of the above-mentioned disadvantages of electromagnets for light loads, it is an object of the present invention to provide at a low cost a light weight electromagnet that is optimal for attracting thin plates, etc. A magnetic coil body attached to the magnetic plate is used as a magnet base, and the magnetic coil body is covered with a non-magnetic covering plate.

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

In FIGS. 1 and 2, 10 and 10' are magnetic plates, and 40 is a non-magnetic coated plate.

The magnetic plates 10 and 10' constitute the magnet base 20 and are mutually symmetrical, with narrow bottom plate parts 12 and 12' being sandwiched between the wide outer walls 14 and 14'.
and inner walls 16, 16', which are slightly smaller in width than the outer walls, are formed to face each other.

As shown in FIG.
, 12' are bent so as to face each other parallel to each other with grooves 18, 18' having a width equal to each other.

The magnetic plates 10, 10' are integrally joined by welding, screwing means, etc. so that the inner walls 16, 16' of each are joined together, and these two symmetrical magnetic plates 10, 10
' forms an integral magnet base 20.

Both magnetic plates 10 and 1 of the magnet base 20 formed in this way
The bottom plate portions 12, 12' of 0' are also joined together in the same manner to form attachment holes 22, 22' shown in FIG. 3 at the ends.

These mounting holes 22, 22' are used to bolt the electromagnet of the present invention in place.

In the magnet base 20 formed as described above, the assembled inner walls 16, 16' serve as inner magnetic poles, and the other outer walls 14, 1
4' is an outer magnetic pole, and a magnetic coil body 28, which has a coil 26 wound around a bobbin 24, is mounted in the groove 18.degree. 18' with a seat plate 30 interposed at the bottom.

The upper part of the magnetic coil body 28 is fixed to the magnet base 20 with non-magnetic mounting fittings 32, 32'.

The covering plate material 40 made of a non-magnetic material has a rectangular hole 42 in the center through which the inner walls 16, 16' which are brought together to form an inner magnetic pole can be inserted. are bent into a U-shape so as to face each other to form left and right side walls 44 and 44' at the corresponding portion, and the covering member 40 is bent at both side walls 44 and 44' as shown in FIGS. 3 to 5. The magnet base 20 is mounted on the magnet base 20 so as to close the upper surface opening and both left and right openings, and the opening of the magnet base 20 and the peripheral edge of the covering plate 40 are integrated by welding or other appropriate means. is joined to.

The present invention has been described above based on the embodiments, but in the present invention, two symmetrical magnetic plate members 10, 10' for a magnet base are sandwiched between narrow bottom plate members 12, 12', and a large width It has outer walls 14, 14' and inner walls 16, 16' whose width is slightly smaller than the outer walls, and the bottom plate member 12'
The two magnetic plates 10, 1 are bent so as to face each other across a groove 18°18' which is approximately equal to the width of the magnetic plate 12'.
The two plates 10 are joined by appropriate means so that the inner walls 16 and 16' of each of the two plates 10 and 0' meet each other.
10' form an integral magnet base 20, and the inner wall 16 and 16' serve as inner magnetic poles, and the outer wall 14,
A magnetic coil body 28 is installed in the grooves 18, 18' so that 14' becomes the outer magnetic pole, and the magnetic coil body 28 is attached to the magnet base 20 by mounting fittings 32, 32' made of non-magnetic material, The inner wall 16, 1 which becomes the inner magnetic pole
6' is inserted into the hole 42 of the rectangular covering plate 40, and both sides of the covering plate 40 in the length direction are bent into a U-shape so as to face each other, and the left and right side walls 44, 44 are inserted into the corresponding part.
The covering plate 40 is mounted on the magnet base so as to close the top opening and the left and right openings of the magnet base 20 with both side walls 44 and 44', and the cover plate 40 is attached to the magnet base 20 so as to close the upper opening and the left and right openings of the magnet base 20. Since the peripheral edge of the covering plate material 40 is integrally joined by appropriate means, the magnetic field induced by the magnetic coil body 28 is transmitted from the inner magnetic poles 16, 16' to the electromagnet 14.
, 14', and exhibits a magnetic effect that is comparable to that of conventional electromagnets using soft iron cores, and is extremely effective in attracting light objects.

Furthermore, the electromagnet of the present invention does not have a cast iron core as a magnet base, which is used in conventional electromagnets, but the magnet base is formed from a magnetic plate material.
It has the effect of being lighter in weight and easier to handle, and the magnet base 20 can be easily obtained by pressing the same plate material, so manufacturing costs can be significantly reduced.

Further, since the magnetic coil body 28 is protected by the covering plate material 40 and both the inner and outer magnetic poles, damage to the magnetic coil body 28 can be prevented.

In particular, when attracting a thin plate, the thickness of the magnetic plates that become the inner and outer magnetic poles can be made the same depending on the thickness of the thin plate to be attracted, so by setting the thickness in this way, magnetic force loss can be reduced. Therefore, there is also the effect that magnetic force can be effectively utilized.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and Fig. 1 is a developed view of a magnetic plate material and a non-magnetic material coated plate material serving as a magnet base.
3 is a plan view showing the electromagnet of the invention, FIG. 4 is a vertical sectional view taken along the line X-X in FIG. 3, and FIG. FIG. 3 is a longitudinal cross-sectional view taken along the line XX in the upward arrow direction. 10, 10'... Magnetic plate material, 12, 12'...
... Bottom plate member, 14, 14' ... Outer wall, 1
6, 16'...Inner wall, 18, 18'...
Groove, 20... Magnet base, 28... Magnetic coil body, 32, 32'... Mounting bracket, 40...
...Covered plate material, 42...Drilling hole.

Claims (1)

[Claims] 1 Two symmetrical magnetic plates 10, 1 for magnet bases
0' has wide outer walls 14, 14' and inner walls 16, 16' whose width is slightly smaller than the side walls, sandwiching narrow bottom plate members 12, 12', and the bottom plate member 12
, 12', and are bent so as to face each other across grooves 18, 18' which are substantially equal in width to the widths of the two magnetic plates 10,
The inner walls 16 and 16' of each of the plates 10' are joined by appropriate means so that they meet each other, and the two plates 10
, 10' form an integral magnet substrate 20, and the inner walls 16, 16' serve as inner magnetic poles, and the outer wall 14
A magnetic coil body 28 is installed in the grooves 18, 18' so that 14' becomes the outer magnetic pole, and the magnetic coil body 28 is attached to the magnet base 20 with mounting brackets 32, 32' made of non-magnetic material. , the inner wall 16 serving as an inner magnetic pole;
16' is inserted into the hole 42 of the rectangular covering plate 40,
In addition, both sides of the covering plate material 40 in the length direction are bent into a U-shape so as to face each other, and left and right side walls 44, 4 are provided at the corresponding portions.
4', and the covering plate 40 is mounted on the magnet base so as to close the upper surface opening and the left and right openings of the magnet base 20 with both side walls 44 and 44', and the cover plate 40 is attached to the magnet base 20 so as to close the upper surface opening and the left and right side openings of the magnet base 20. An electromagnet characterized in that the and the peripheral edge of the covering plate material 40 are integrally joined by appropriate means.