JPS5925830Y2 - Permanent magnetic lifting device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a permanent magnet type lifting device, and relates to a permanent magnet type lifting device used, for example, as a lifting device for steel products or steel materials.

A conventional permanent magnet type lifting device of this type will first be explained with reference to FIGS. 1 to 3.

Here, FIG. 1 is a front view thereof, and FIGS. 2 and 3 are schematic cross-sectional views of essential parts showing the rotational position of the permanent magnet.

In the figure, IA, IB, yokes made of magnetically conductive material, 2
A and 2B are non-magnetic materials, and are yokes IA.

1B is joined together with non-magnetic materials 2A and 2B sandwiched therebetween, and a lumen 3 is bored in the joint.

4 is a permanent magnet, which is rotatably provided in the inner cavity 3, and is rotated by the operation of the bundle 5; 6A and 6B indicate the ends of the yokes IA and IB; be.

As described above, the permanent magnet 4 is rotated, and the N shown in FIG.
When set to the S position, the end 6A of the yoke 1A has a magnetic pole N.
The end portion 6B of the yoke 1B is excited so that a magnetic pole S is generated, thereby attracting a suspended object such as a steel product or a steel material.

Next, the permanent magnet 4 is rotated to N as shown in FIG.

When it is in the S position, it is demagnetized and loses its attraction force.

The conventionally used permanent magnet 4 configured as described above is not only expensive because it uses an integral cast magnet.
It is necessary to perform precision machining to match the sliding surface of the inner cavity 3 formed by the yokes IA and IB, which increases the machining cost.
The drawback is that overall productivity is poor.

The present invention eliminates these drawbacks and aims to provide a permanent magnet type lifting device with reduced costs.

A feature of the present invention is that a pair of yokes made of a magnetically permeable material separated from each other by a non-magnetic material are each provided with an inner cavity, and a permanent magnet member is rotatably encased within the inner cavity. In a permanent magnet type lifting device provided with an attraction surface, the permanent magnet member is formed by arranging a plurality of plate-shaped permanent magnets in parallel and fixing pole pieces made of a magnetically conductive material to both ends thereof, and In the permanent magnet type lifting device, a side surface of each yoke is provided with an inclined portion toward the attraction surface.

An embodiment of the present invention will be described with reference to FIG.

FIG. 4 is a longitudinal sectional view of an embodiment of the present invention.

In the figure, 7A and 7B are yokes 9A made of a magnetically conductive material having inclined portions 8a and 8b, respectively.

9B is a non-magnetic material, and the yokes 7A and 7B are joined together with the non-magnetic materials 9A and 9B sandwiched between them, and a lumen 10 is bored in the joint portion.

11 aa, 11 b. 11C, 11d is a plate-shaped permanent magnet, and its magnetic pole N.

Pole pieces 12A and 12B made of a magnetically permeable material are provided at both ends of the pole pieces 12A and 12B, and the ends that are not in contact with the pole pieces 12A and 12B are internal This is in a manner that it does not come into contact with the cavity 10.

Further, 13A and 13B are suction surfaces.

Therefore, the above permanent magnets 11a, 11b, 1
1C.

11d and the pole pieces 12A, 12B are fixed together by, for example, adhesive or bolting, and the ends of the pole pieces 12A, 12B are connected to the yokes 7A, 7B.
The inner cavity 10 is machined so as to slide on the spherical surface of the bore 10.

In the above configuration, the permanent magnets 11 a, 11 b,
Since the pole pieces 11C and 11d have the above-mentioned configuration, there is no need for machining such as polishing using plate-shaped casting or ferrite permanent magnets, and the pole pieces 12A and 12B are pole pieces made of a magnetically permeable material such as soft iron. Therefore, spherical finishing of the end portion is easier and less expensive than spherical finishing of cast or ferrite permanent magnets.

Furthermore, since the yokes 7A and 7B are provided with inclined portions 8a and 8b toward the attraction surfaces 13A and 13B, magnetic force is concentrated on the attraction surfaces 13A and 13B, and the attraction force can be improved. It is something.

For example, in Fig. 4, the maximum height of the yokes (SS material) 7A and 7B is 185 mm, the maximum width is 180 mm, and the inner diameter is 150 mm, and the thickness x height is 25.4 mm x
101.6 mm permanent magnet (YBM-1 manufactured by Hitachi Metals)
) and the pole pieces 12A and 12B are made of the same material as the yoke, the inclined portion 8a.

When the suction surfaces 13A and 13B had no width 8b and the width of the suction surfaces 13A and 13B was 40 mm, the suction force was approximately 380 kg.
.

The suction force is approximately 580 when the width of 13B is 20 mm.
When the angles of the slopes sa and sb were set to 75° and the width of the suction surfaces 13A and 13B was 10 mm, the suction force was approximately 700 kg.

As described above, the present embodiment has the following advantages because it is configured as described above.

(2) A plurality of plate-shaped permanent magnets are arranged in parallel so that their magnetic poles N and S are adjacent to each other, and pole pieces made of a magnetically permeable material are provided at both ends, so that a sufficient attraction force can be obtained.

2. Costs are reduced because there is no need to cast or machine ferrite permanent magnets.

3. Since the yoke is provided with an inclined portion toward the attracting surface, it is possible to concentrate the magnetic force on the attracting surface, thereby improving the attracting force.

Taking all of the above into account, when the present invention is used,
It is possible to obtain a permanent magnet type lifting device that has high performance, good productivity, and can be expected to reduce costs, and can be said to be a device with excellent practical effects.

In addition, in the description of the embodiment of the present invention, there is one in the yoke.
Although we have described an example in which a yoke is provided with a plurality of lumens and a permanent magnet is rotatably housed within the yoke, the present invention provides a plurality of lumens within the yoke and a permanent magnet is rotatably housed in each lumen. Needless to say, the present invention can also be applied to a permanent magnet type lifting device.

[Brief explanation of the drawing]

Figures 1, 2, and 3 show a conventional permanent magnet type lifting device, with Figure 1 being a front view, and Figures 2 and 3 showing the rotational position of the permanent magnet. FIG. 4 is a longitudinal sectional view of a permanent magnet type lifting device showing an embodiment of the present invention. 7A, 7B: F-evening, 11 a, 11 b, 11 C,
11d: Permanent magnet, 12A, 12B: Pole piece.

Claims (1)

[Claims for Utility Model Registration] 1. A pair of yokes made of magnetically permeable materials separated from each other by a non-magnetic material, each having an inner cavity, a permanent magnet member rotatably enclosed within the inner cavity, and the above-mentioned In a permanent magnet type lifting device in which each yoke is provided with an attraction surface, the permanent magnet member is formed by arranging a plurality of plate-shaped permanent magnets in parallel and fixing pole pieces made of a magnetically conductive material to both ends of the permanent magnets. In addition, a permanent magnet type lifting device characterized in that a side surface of each of the yokes is provided with an inclined portion facing the attracting surface. 2. The permanent magnet type lifting device according to claim 1, wherein the permanent magnet is a ferrite magnet.