JPS58175810A - Demagnetizer - Google Patents

Abstract

PURPOSE:To demagnetize a material to be demagnetized easily by arranging a plurality of permanent magnets to a guide section guiding the material so that magnetic flux density changes to small value from large one. CONSTITUTION:A magnetic element is constituted by inserting the permanent magnets 1a, 1b among magnetic poles 3c, 3d, 3e so that the magnetic poles are changed into ones, N and S thereof are alternated. The magnetic poles 3c, 3d, 3e and the permanent magnets 1a, 1b are encased into a box body consisting of a bottom plate 6 and a case 4, and the guide section guiding the material to be demagnetized 2 along the magnetic poles 3c, 3d, 3e is set up to the upper surface of the case 4. Air gaps among the guide section 5 and the magnetic poles are increased in succession with advance toward the magnetic poles 3c, 3d, 3e. Accordingly, the material to be demagnetized 2 moving on the guide section 5 is given a damping alternating field.

Description

[Detailed description of the invention] The present invention relates to established porcelain using permanent magnets.

Conventionally, demagnetizers, whether AC or DC type, change the direction of the current passing through the excitation coil by changing the polarity of N-8, and by reducing the current and localizing the entire magnetic field, the demagnetizer achieves attenuation alternation. Demagnetization is performed using a magnetic field.

However, such conventional demagnetizers require power supply equipment because they include electromagnets as an essential component, and have drawbacks such as temperature rise due to heat generation from the excitation coil. This was made in order to eliminate the drawbacks of this method, and the purpose is to provide a de-porcelain ware using permanent magnets.

In order to achieve this objective, the present invention constitutes a demagnetizer in which a plurality of permanent magnets and magnetic pole members are arranged in sequence so that the magnetic flux density in the guide portion that guides the object to be demagnetized changes from large to small. , K1 is designed to perform demagnetization by causing the entire relative movement between the demagnetizer and the object to be demagnetized.

Hereinafter, the basic principle and embodiments of the present invention will be explained with reference to the accompanying drawings.

FIG. 1 is a diagram illustrating the basic principle of the present invention.

In FIG. 1, 1 is a permanent magnet, and N and S magnetic poles 3a and 3b are provided on both sides of the permanent magnet 1 to constitute a basic surface magnetic element. Since this magnetic element uses a single permanent magnet, the generated magnetic flux is constant. Therefore, in order to perform demagnetization using this magnetic element, a predetermined relative movement must be performed between the object to be demagnetized and the magnetic element.

1- That is, the object to be demagnetized 2tilk is initially placed between the magnetic poles 3a and 3b of the magnetic element and at the position closest to the magnetic element,
Next, the object 2 to be demagnetized is reciprocated parallel to the line connecting the magnetic poles 3a and 3b, and gradually moved in a direction perpendicular thereto.

Here, it is necessary that the magnetic force given to the magnetic element when the object 2 to be demagnetized is initially in the KH & magnetic position It must be stronger and more dangerous than the magnetic force that the object 2 itself initially has. Needless to say. In this way, the magnetic element and the demagnetized object 2
In order to perform a predetermined relative movement between the demagnetized object 2, an attenuating alternating magnetic field is applied to the demagnetized object 2, and the same result as the original result is produced, and demagnetization is performed.

FIG. 2 shows an embodiment of the present invention. Magnetic ff13c.

3d, '(0-order magnetic poles 3c, 3d, 3e and permanent magnet 1a sandwiched between them to constitute a magnetic element, so that e is N-8 alternating magnetic poles.
, 1bQ is housed in a housing consisting of a bottom plate 6 and a case 4, and the upper surface f of the case 4 is the object to be demagnetized 2? Magnetic poles 3c, 3d, 36vc
Guide section 5 to guide you along? establish. Here, the air gap between the guide portion 5 and the magnetic pole is Vr, which increases sequentially as the magnetic poles 3c, 3d, and 3e are reached. If you do this, the guide section 5? If an attenuating alternating magnetic field is applied to the object 2 to be demagnetized which moves X4, the result will be the same as in the case of Kasumi, and the demagnetization will be accelerated.

The second south demagnetizer is an example of three poles, but the more magnetic poles there are, the more effective the demagnetizer can be. In this embodiment, the guide part 5 and the magnetic pole 3c are modified so that the magnetic force in the guide part 5 from the magnetic poles 3c to 3d is larger than the magnetic force that the object to be demagnetized 2 originally had. The size of the gap between 3d must be set.

FIG. 3 shows another embodiment of the invention. Magnetic pole 3f.

A magnetic element is constructed by inserting permanent magnets 1e and 1d1i between them so that 3g and 53h have N-8 alternating magnetic poles. Here τ, the magnetic flux density from the magnetic pole is 3f, 3g, 3
Permanent magnets 1c and l gradually decrease as h increases.
Magnetic force of d? It's getting smaller and smaller.

Next, the magnetic poles 3f, 3g, 3 and the permanent magnet 1c.

1d is housed in a housing consisting of a bottom plate 6 and a case 4L, and the upper surface of the case 4 includes a KFi magnetic material 2tl and magnetic poles 3f and 3g.

Guide section 5f that guides along 3hK - Provide 0 If you do this, the guide section 5? An attenuating alternating magnetic field is applied to the moving object 2 to be demagnetized, resulting in the same result as in t, and the object is demagnetized. In this embodiment, the magnitude of the magnetic force of the permanent magnet IC is set so that the magnetic force in the guide section 5 from the magnetic pole 3f to 3gVC is large enough to exhibit a large magnetic force area that the object 2 to be demagnetized initially has. I don't have it without it. It goes without saying that the more magnetic poles there are, the more effective the demagnetizer becomes.

In the embodiment described above, a guide portion for the object to be demagnetized is provided on the upper part of the magnetic element, but the magnetic element is formed into a cylindrical shape with a ring-like cross section 1fi, and the object to be demagnetized is placed in the cylindrical shape. A demagnetizer equipped with a guide to guide the magnet is also effective.

According to the present invention, magnetic elements consisting of permanent magnets and magnetic pole member force 1 are arranged in order from strongest to weakest magnetic force, and the object to be demagnetized is moved along the direction in which the magnetic elements are arranged. Since it is possible to apply a magnetic alternating magnetic field to the object to be demagnetized 177', it is possible to obtain a permanent magnet type demagnetizer that can easily demagnetize the object to be demagnetized. The demagnetizer of the present invention does not require power supply equipment unlike conventional demagnetizers, does not cause temperature rise due to heat generation of the excitation coil, etc., and has the advantage of being compact in structure.

[Brief Description of the Drawings] Fig. 1 is an explanatory diagram of the basic principle of the present invention, Fig. 2 is a longitudinal sectional view of an embodiment of the invention, Fig. 3 is a longitudinal sectional view of another embodiment of the invention, FIG. 4 is a longitudinal sectional view of the magnetic element having a cylindrical shape with a ring-shaped cross section. 1* la, lb + lc, xa... permanent magnet, 2
...Demagnetized object, 3a, 3b* 3e, 3d, 3e, 3
f. 3g, 3k...magnetic pole. ￥ 1 Figure 3 ni b Ic 59 Io 5n Sushi 2 Closed 4 Figure

Claims (1)

[Claims] 1. Guide part 'fy that guides the object to be demagnetized along a predetermined path
A plurality of magnetic elements each consisting of a permanent magnet and a magnetic pole member are housed in the casing along the predetermined path. A demagnetizer characterized by its composition. 2. The demagnetizer according to claim 1, wherein the magnetic element is configured such that the gap between the guide portion and the magnetic pole changes from large to small. 3. The demagnetizer according to claim 1, wherein the magnetic elements are arranged in order from permanent magnets with a large magnetic force to permanent magnets with a small magnetic force.