JPH02224305A - Method and device for magnetization of linear magnetic material - Google Patents

Abstract

PURPOSE:To make it possible to form the distribution of magnetic field uniformly by a method wherein a linear magnetic material is magnetized by inverting magnetic pole for every prescribed interval against the axial direction of the linear magnetic material. CONSTITUTION:A linear magnetic material 4 is placed on a magnetized yoke A in its direction, and a current is applied to a conductor wire. When a current is made to flow on the conductor wire 3, N and S magnetic poles in the prescribed dimension (l) are generated instantaneously on a magnetic pole part 2 alternately. Then, the part placed on the pole part 2 of the linear magnetic material 4 is magnetized in such a manner that magnetic pole will be inverted at the fixed dimension (l) against axial direction. When the magnetization operation is finished, the magnetized part of the linear magnetic material is detected by a take-off quantity detector or a magnetic detector, the magnetized part is rolled up by a wind-up machine S7, the following non-magnetized part is placed on the magnetic pole part 2, and it is magnetized in the same manner as above. Hereinafter, the linear magnetic material 4 is magnetized repeatedly for every length of the magnetic pole successively. As a result, the magnetizing operation can be done quickly, and the magnetic flux density of each magnetic pole of the linear permanent magnet can also be formed uniformly.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a valley magnetization method for linear permanent magnets that are magnetized so that the polarity of the magnetic poles in the axial direction is alternately reversed every predetermined dimension. This invention relates to a magnetizing device.

[Conventional technology]

Conventionally, magnetic therapy devices using permanent magnets have been known for the purpose of promoting blood circulation, relieving muscle overtension, and alleviating muscle pain or stiffness. Publication No. 39-26259), magnetic supporter (
Publication No. 50-55791), Magnetic futon (Jitko Publication No. 50-55791)
5-44534), magnetic pine tress (Utility Model No. 56
-88268), etc., many ideas have been proposed.

The above-mentioned permanent magnet magnetic therapy device is designed to secure the width of the magnetic field by attaching a plurality of granular or block-shaped permanent magnets to a pine tress, etc., at intervals of 10 to 30 cm, for example. When the magnetic flux density of a magnet is 10 cm or more away from the surface, the maximum magnetic flux density of the surface is 171
Since the magnetic field decreases to less than 0, it is essentially a point-like magnetic field distributed at predetermined intervals on the surface of the pine tress, and it cannot be said that a sufficient width of the magnetic field has been secured. . For this reason, a linear or planar magnetic part that can form a magnetic field over a wide area has been desired.

Therefore, the present inventor has woven a linear flexible plastic composite magnet, which is mainly composed of barium ferrite and chlorinated polyethylene and has a surface density of 8°O Gauss or more, into a fiber cloth, etc., and has created a linear or planar magnetic field. proposed a magnetic therapy device that forms a magnetic field (Japanese Utility Model Application Publication No. 61-91241).

[Problem to be solved by the invention]

By the way, for example, in a linear magnet used in a magnetic therapy device, it is desirable that the surface magnetic flux density is 1000 Gauss or more and the magnetic field distribution is formed in a relatively -like manner. It only describes the magnitude of the surface magnetic flux density of the plastic composite magnet, and does not clarify the distribution and direction of the magnetized magnetic poles, nor the magnetization method and magnetization device.

The present invention has been made in view of the above problems, and provides a magnetizing method and a magnetizing device for magnetizing a linear magnetic material by alternately reversing its magnetic poles at predetermined intervals in the axial direction. With the goal.

[Means to solve the problem]

In order to solve the above-mentioned problems, the present invention provides a method in which a linear magnetic body is placed on a plurality of magnetic pole parts configured such that the polarity of the magnetic pole pieces is alternately reversed every predetermined dimension, and a linear magnetic body is placed on each magnetic pole piece. The linear magnetic material is magnetized through a first step of generating a magnetic field and a second step of drawing the linear magnetic material in its axial direction by the length of the magnetic pole portion.

Further, while the linear magnetic body is drawn in the axial direction at a predetermined speed on a plurality of magnetic pole parts configured such that the polarity of the magnetic pole piece is alternately reversed every predetermined dimension, the linear magnetic body is removed from the magnetic pole part. A magnetic field is generated in each magnetic pole piece each time it is pulled out by the length, thereby magnetizing it.

In addition, the magnetizing device used in the above magnetizing method includes a base made of a magnetic material on which a plurality of slots are formed at predetermined intervals in one direction on the surface thereof, and a base made of a magnetic material that is embedded in the above slots in a wave shape while being folded back at the terminal portion. It consists of a conductor wire having both ends connected to a power source.

[Effect]

In the method for magnetizing a linear/magnetic material according to the present invention, a linear magnetic material is placed on a magnetic pole section configured such that the polarity of the magnetic pole piece is reversed every predetermined dimension, and then magnetized. Since the unmagnetized part is taken out and the following unmagnetized part is placed on the magnetic pole part and magnetized, the linear magnetic material is magnetized every length of the magnetic pole part so that the polarity of the magnetic pole is reversed every predetermined axial dimension. magnetized at once.

Further, while the linear magnetic material is being drawn at a predetermined speed on a magnetic pole section configured such that the polarity of the magnetic pole piece is reversed every predetermined dimension, the linear magnetic material is drawn off by the length of the magnetic pole section. In a device that generates a magnetic field in each magnetic pole piece at each time, when the linear magnetic body is drawn at a predetermined speed by the length of the magnetic pole portion, the polarity of the magnetic pole of the following unmagnetized portion is reversed every predetermined axial dimension. Each length of the magnetic pole part is magnetized at once.

Further, in the magnetizing device according to the present invention, a plurality of slots are formed at predetermined intervals in one direction on the surface of a base made of a magnetic material, and conductor wires are buried in the slots in a wave shape while being folded back at their terminal ends. Therefore, when a direct current is passed through the conductor wire, alternately reversed magnetic fields are generated in the magnetic pole pieces formed between the slots.

〔Example〕

FIG. 1 is a diagram showing the manufacturing process of a linear permanent magnet according to the present invention. A linear permanent magnet is manufactured as follows.

That is, a linear magnetic material extruded from the extrusion molding machine s1 at a speed of, for example, 2 m/min is taken by a take-up machine S3, cooled and solidified by a cooling device s2, and wound up by a winding machine S4. Next, the wound linear magnetic body is magnetized by a magnetizing device s.
After being magnetized in step 5 so that the polarity of the magnetic poles is reversed every predetermined dimension in the axial direction, it is taken up by a take-up machine S6 and wound up by a winding machine S7.

FIG. 2 is a perspective view showing an example of the magnetizing device S5.

Moreover, FIG. 3 is a plan view of the magnetizing device S5. In FIG. 2, the magnetic pole portion 2 of the magnetizing yoke A is constructed as follows. That is, on the surface of a flat base plate 1 made of a magnetic material, preferably a ferromagnetic material such as iron, a slot 1a having a groove width g2 (see Fig. 4) cut in a direction perpendicular to the elongated direction is formed in the elongated direction. An appropriate number of them are formed at intervals f11 (see FIG. 4). Further, in the slot 1a, a conductor wire 3 made of copper or the like covered with an insulator and having a diameter approximately equal to the groove width I22 is folded back at the terminal end of each slot 1a to form a wavy shape, as shown in FIG. A DC excitation current is supplied to both ends of the conductor wire 3 from a capacitor-type magnetizing power supply 5. Note that the number of conductors 113 is not limited to one, but a plurality of conductors may be buried.

The capacitor-type magnetizing electric current Ifi, 5 momentarily supplies a large excitation current by discharging the charge accumulated in a large-capacity capacitor through the conductor wire 3.

In the above 11η configuration, when an excitation current is supplied to the conductor wire 3, each magnetic pole piece 1b has an N as shown in FIG.

A magnetic pole of S is formed, and the magnetic pole part 2 has a certain dimension Q (-g1
+ρ2), a magnetic pole whose polarity is reversed is formed. For example, I 1 = 1. 5mm5 j22 = 2-5
m m, and when an excitation current with a maximum current of about 10,000 amperes is passed through the conductor wire 3, the magnetic pole piece 1b has an excitation current of about 100 amperes.
The magnetic poles with a magnetic flux density of 0.00 Gauss are formed so as to be alternately reversed at a pitch of 4°Q mm.

The linear magnetic body 4 is magnetized using the above-mentioned magnetizing device as follows. That is, the linear magnetic body 4 is placed on the magnetizing yoke A in that direction, and a current is passed through the conductor wire 3. Conductor wire 3
When a current flows through the magnetic pole part 2, as mentioned above, N
, S occur alternately with a constant dimension g. The magnetic field generated in the magnetic pole part 2 causes the magnetic pole part 2 of the linear magnetic body 4 to
The portion placed on top of is magnetized so that the magnetic poles are reversed in the axial direction by the above-mentioned constant dimension g. In the above example of 10,000 Gauss, a coercive force of 1,000 Gauss or more can be obtained. When magnetization is completed, a magnetized portion of the linear magnetic material 4 is detected by a take-up amount detector or a magnetic detector (not shown), which will be described later, and is wound up by a winder S7, and the subsequent unmagnetized portion is used as a magnetic pole part. 2 and magnetize it in the same manner as described above. Thereafter, the linear magnetic body 4 is sequentially magnetized repeatedly for each length of the magnetic pole portion 2.

FIG. 5 is a diagram showing the magnetic poles and magnetic field distribution of a linear permanent magnet obtained by magnetizing a linear magnetic body with a circular cross section using the above method. In the figure, one side of the surface (upper or lower side in the figure),
When it is assumed that micro-magnets with an S-pole formed on the other half surface and having a constant axial dimension g are continuously lined up in the axial direction, the magnetic pole of the linear permanent magnet is the same as that of the other adjacent micro-magnet. are formed continuously so that the polarity of the two polarities is reversed.

Therefore, a magnetic field HT is formed in the direction perpendicular to the axial direction from the upper north pole to the lower south pole, and between the above micromagnet and the adjacent micromagnet, an upper portion and a lower portion are formed, respectively. An axial magnetic field HE is formed in the axial direction, and a perpendicular magnetic field HT and an axial magnetic field HE, in which the direction of the magnetic field is reversed every dimension g in the axial direction, are continuously formed.

A linear permanent magnet with such a magnetic field formed thereon retains the magnetic field formed near its outer surface relatively well even if it is slightly twisted, so when it is used, for example, in a futon as a magnetic therapy device, A good linear magnetic field can be formed, further enhancing the effectiveness of magnetic therapy.

Note that the above magnetization method and magnetization device can be applied to linear magnetic bodies in addition to elliptical, rectangular, and flat shapes as well as belt-shaped objects.

In the above embodiment, the winding operation of the winding machine S7 was performed intermittently, but it is also possible to continuously magnetize while winding.

That is, assuming that a linear magnetic material is magnetized at a rate of 6 m/min, for example, if a capacitor-type magnetizing power supply device 5 with a charging time of approximately 5 seconds and a discharging time of approximately 2 milliseconds is used, the magnetization will be completed within the above charging time. The distance that the linear magnetic material moves is 50 cm, and the distance that the linear magnetic material moves within the above discharge time is 0.degree. 2 mm. Therefore, since there is almost no effect on the magnetic flux density of the magnetized magnetic pole due to movement within the above discharge time, if the dimension of one magnetization is set to 50 cm or more, the winding machine S
7, it is possible to continuously magnetize the linear magnetic material while winding it up. In this case, a pickup amount detector is provided in the pulling machine S6, and the conductor wire 3 is energized from the magnetizing power source 5 every time the linear body is pulled by a predetermined length (the length of the young magnetic part 2). A current is supplied to generate a magnetic field in each magnetic pole piece 1b of the magnetic pole part 2.Alternatively, a magnetic detector is provided on the magnetizing yoke A to monitor the number of magnetic poles of the magnetized linear magnetic material, and a magnetic field is generated in each magnetic pole piece 1b of the magnetic pole part 2. When the number of magnetic poles is counted, the excitation current may be supplied from the magnetizing power source 5 to the conductor wire 3.

〔Effect of the invention〕

As explained above, in the method for magnetizing a linear magnetic material according to the present invention, the linear magnetic material is magnetized every predetermined length of the magnetic pole portion having an appropriate length, so that the magnetization work can be performed quickly. can be done. Furthermore, if the magnet is magnetized while being wound up with a winding machine, it will contribute to improving the efficiency of the magnetizing work and reducing the cost of the product. Moreover, since the magnetic poles are magnetized so that their polarities are reversed every predetermined dimension in the axial direction, the magnetic flux density of each magnetic pole of the linear permanent magnet is formed to be uniform.

Furthermore, in the magnetizing device according to the present invention, a plurality of slots are formed at predetermined intervals on the surface of the base made of a magnetic material, and the conductor wires are buried in the slots in a wavy manner while being folded back at their terminal ends. The magnetic body can be magnetized so that the polarity of the magnetic poles is reversed every predetermined dimension in the axial direction of the magnetic body. Furthermore, since the structure is simple, maintenance and inspection are easy. Furthermore, since the slot spacing and the magnetic pole pitch correspond to each other, if a linear magnetic material is magnetized using a magnetizing device with a different slot spacing, linear permanent magnets with different magnetic pole pitches can be easily produced. can be manufactured.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the manufacturing process of a linear permanent magnet according to the present invention, FIG. 2 is a perspective view of a magnetizing device according to the present invention, FIG. 3 is a plan view of the magnetizing device, and FIG. FIG. 5, a side sectional view of the magnetizing device, is a distribution diagram of magnetic poles and magnetic fields of a linear permanent magnet magnetized by the magnetizing device according to the present invention. DESCRIPTION OF SYMBOLS 1... Base, 1a... Slot, 1b... Magnetic pole piece, 2... Magnetic pole part, 3... Conductor wire, 4... Linear magnetic body, 5... Magnetizing power supply. Figure 3 h Patent applicant Apollo Medical Instruments Co., Ltd. Representative Patent attorney Etsu Kotani Kawamukai
Chief Patent Attorney 1) Masamukai Patent Attorney Takao Ito Figure 4

Claims (3)

[Claims] 1. a first step of generating a magnetic field in each magnetic pole piece in a state in which a linear magnetic body is placed on a plurality of magnetic pole parts configured such that the polarity of the magnetic pole piece is alternately reversed every predetermined dimension; A method for magnetizing a linear magnetic material, comprising a second step of pulling the linear magnetic material in the axial direction by the length of the linear magnetic material. 2. While pulling a linear magnetic body in the axial direction at a predetermined speed on a plurality of magnetic pole parts configured such that the polarity of the magnetic pole piece is alternately reversed every predetermined dimension, the linear magnetic body is pulled over the length of the magnetic pole part. A method for magnetizing a linear magnetic material, characterized in that a magnetic field is generated in each magnetic pole piece each time the magnetic pole piece is drawn. 3. A wire consisting of a base made of a magnetic material on which a plurality of slots are formed at predetermined intervals in one direction on its surface, and a conductor wire having both ends buried in the slot in a wavy shape while folding back at its terminal end and connected to a power source. Magnetizing device for magnetic materials.