JPH0669034A - Magnetizing coil for rodlike multipolar magnet and magnetizing device thereof - Google Patents

Abstract

PURPOSE:To control the number of lines of end face magnetic flux at each magnetic pole of a rodlike multipolar magnet to make the position of each magnetic pole correspond properly to each winding part of a magnetizing coil and to take out the rodlike magnet set in the coil. CONSTITUTION:A magnetizing coil 16 is constituted into such a structure that annular spacers 20 are made to interpose in order between independent hollow coils 18 to constitute a coil body part 22, an insertion of a rodlike multipolar magnet 14 to be magnetized is made possible in a penetrating hole part 24 in the body part and the number of windings of the hollow coils and the axial thickness of the spacers can be made an increase or decrease adjustment according to a large or small number of lines of magnetic flux, which is required at each magnetic pole. A magnetizing device is obtained in such a constitution that a knockout pin, which can be freely reciprocated and can be made to stop at a necessary position, is made to face to the penetrating hole part in this magnetizing coil, the magnetizing position of the magnet 14 inserted in the penetrating hole part is made adjustable by this pin and at the same time, after a magnetization ends, the magnet can be made to project outward of the coil body part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetizing coil for a rod-shaped multipole magnet and a magnetizing device therefor.

[0002]

2. Description of the Related Art In the field of grazing cattle, for example, magnetic metals such as wires and nails, which are often contained in feed, are generally adsorbed and held by a permanent magnet swallowed in the stomach of cattle. . It is empirically known that when cows eat wire, nails, etc. together with feed, they cause stress and ulcers by stimulating the stomach wall, so swallow it into the stomach. It is intended to attract and hold the wire or the like by means of a permanent magnet provided. This trial itself is not new, and in the past, as shown in FIG. 4, the ordinary rod-shaped magnet 10 magnetized with two poles was used. However, since the two-pole bar-shaped magnet 10 has magnetized surfaces only on both end surfaces, depending on the state in which the nail or the wire 12 is attracted to the magnetized surface, the magnet shown in FIG.
As shown in, the magnet 10 may extend in the direction orthogonal to the magnet 10 or in the axial direction. In such a case, the metal 12 such as a nail attracted to the rod-shaped magnet 10 rather strongly stimulates the inner wall of the stomach of the cow, which has the opposite effect.

Therefore, as shown in FIG. 6, although it is in the form of a rod-shaped magnet, it is not a conventional two-pole magnetized magnet but a rod-shaped multi-pole magnet 14 in which the polarities of S pole and N pole are alternately shown in the axial direction. Has also been adopted. The rod-shaped multi-pole magnet 14 of the illustrated example has 1 pole (N), 2 poles (S), 3 poles (N), 4 poles (S), 5 poles (N), 6 poles from the left.
It is a (S) 6-pole magnet. In this case, nails or wire 1
Even if 2 is attracted to the rod-shaped multi-pole magnet 14, it is easily attracted in a form along the longitudinal direction of the magnet 14 because different polarities are continuous at required intervals. Therefore, the metal 12 adsorbed on the rod-shaped multi-pole magnet 14 does not strongly stimulate the inner wall of the stomach of the cow, and can effectively and beforehand prevent the occurrence of stress and ulcer.

[0004]

Since the rod-shaped multi-pole magnet 14 according to the above is to be orally loaded into the stomach of a cow,
In order to manufacture and market this, approval of the Ministry of Agriculture and Forestry is required in Japan. In order to receive this approval, the following standards, which set the dimensions and the number of magnetic flux lines (G) in each magnetic pole, must be satisfied. That is, the external dimensions are 80 mm in length and 12 mmφ in diameter, and the distance between adjacent magnetic poles is 16
± 2 mm. Further, the number of magnetic flux lines generated from each magnetic pole, that is, the number of end face magnetic flux lines is regulated to fall within the following range. 1 pole (N) 1,000 to 1,300 (G) 2 poles (S) 300 to 500 (G) 3 poles (N) 400 to 700 (G) 4 poles (S) 400 to 700 (G) 5 poles (N) 300 to 500 (G) 6 poles (S) 1,000 to 1,300 (G) That is, the number of magnetic flux lines of the magnetic poles on both end sides is set to be large, and at the intermediate portion, The number of magnetic flux lines is set to be relatively small. However, in the conventional technique, it was extremely difficult to magnetize each magnetic pole in the rod-shaped multi-pole magnet 14 so as to be within the range of the number of end face magnetic flux lines. In particular, the conventional magnetizing coil for magnetizing multi-pole magnets on rod-shaped magnets only changes the wire material to a long cylindrical bobbin in a close contact or sparse manner and winds it. Even if it could be done by itself, it was almost impossible to control the number of end face magnetic flux lines in each magnetic pole.

Further, in a magnetizing device for manufacturing a rod-shaped multi-pole magnet which is multi-pole magnetized, each magnetic pole portion of the rod-shaped magnet material to be magnetized and each winding in which the number of windings in the magnetizing coil is changed. It is important to set up so that the department and department correspond appropriately. However, in the conventional magnetizing device, since the magnetizing coil used for the magnetizing device has the above-described structure, there is a drawback that the magnetic pole portions of the rod-shaped magnet material and the winding portions of the magnetizing coil cannot be appropriately associated with each other. there were. Further, it is also pointed out that it is difficult to efficiently take out the rod-shaped magnet material inserted and set in the magnetizing coil after the multi-pole magnetizing is completed, which requires a lot of labor and time for the operator.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems inherent in a magnetizing coil and a magnetizing device for a rod-shaped multipole magnet, and has been proposed in order to suitably solve the problems. It is possible to control the number of end face magnetic flux lines in each magnetic pole to be magnetized with high accuracy, and it is possible to appropriately correspond each magnetic pole part of the rod-shaped magnet material to each winding part of the magnetizing coil, and It is an object of the present invention to provide a means for efficiently taking out the rod-shaped magnet material set in the coil after the magnetization is completed.

[0007]

SUMMARY OF THE INVENTION In order to overcome the above-mentioned problems and achieve the intended purpose, the present invention is such that the polarity is alternately inverted in the axial direction and the number of magnetic flux lines of each magnetic pole is at both ends. Is a magnetizing coil for magnetizing a rod-shaped multi-pole magnet that is set to be large and relatively small in an intermediate portion, and is a ring-shaped coil between independent hollow coils. A coil main body is formed by serially interposing spacers, and a rod-shaped multi-pole magnet to be magnetized can be inserted into a through hole coaxially formed in the coil main body. The number of windings in the hollow coil and the axial thickness of the ring-shaped spacer can be adjusted to be increased or decreased according to the required number of magnetic flux lines in each magnetic pole of the rod-shaped multipole magnet. To do.

Further, in order to overcome the above-mentioned problems and achieve the intended purpose, another invention of the present application is that the polarity is alternately inverted in the axial direction, and the number of magnetic flux lines of each magnetic pole on both ends is In the magnetizing device for the rod-shaped multi-pole magnet, which is set to be large and relatively small in the middle part,
A ring-shaped spacer is serially interposed in series between independent hollow coils to form a coil main body, and a rod-shaped member to be magnetized in a through hole coaxially formed in the coil main body. A rod-shaped rod provided with a magnetizing coil that allows insertion of a multi-pole magnet, and a knockout pin that is reciprocally movable and that can be stopped at a required position is faced with a through hole in the coil body, and is inserted into the through hole. The magnetizing position of the multi-pole magnet with respect to the coil body can be adjusted by the knockout pin, and the rod-shaped multi-pole magnet after the magnetization can be projected outward in the axial direction of the coil body by the knockout pin. It is characterized by being configured.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a magnetizing coil and a magnetizing device for a rod-shaped multipole magnet according to the present invention will be described below with reference to the accompanying drawings with reference to preferred embodiments. FIG. 1 is a vertical cross-sectional view of a magnetizing coil according to a preferred embodiment. The magnetizing coil 16 is composed of a large number of hollow coils 18 formed by winding a wire rod a required number of times. That is, the hollow coil 18 made of an individual independent body is provided between each adjacent hollow coil 18 and
A ring-shaped spacer 20 made of a synthetic resin is sequentially interposed to form a coil body 22 connected in series as a whole. The coil body 22 has the coil 1
The hollow portion 8 and the hollow portion of the spacer 20 cooperate to form the through hole portion 24 coaxially, and the rod-shaped multi-pole magnet 14 to be magnetized in the through hole portion 24 can be inserted and removed freely. Allows insertion.

As described above, the magnetizing coil 16 comprises the independent hollow coil 18 and the ring-shaped spacer 2 interposed therebetween.
It has 0 and. Therefore, in order to magnetize the rod-shaped multi-pole magnet 14 so as to be within the range of the number of magnetic flux lines (G) required to obtain the approval of the Ministry of Agriculture and Forests described above, the number of windings and the ring shape in the hollow coil 18 are required. It suffices to increase / decrease the thickness of the spacer 20 in the axial direction, but in the present embodiment, these adjustments can be made extremely easily. For example, according to the above standard, the number of magnetic flux lines of the magnetic poles on both end sides of the rod-shaped multi-pole magnet 14 is 1,000 to 1,300 (G), which is set to be sufficiently large, and 300 at the intermediate portion. ~ 500
(G) and 400 to 700 (G), the number of magnetic flux lines is set to be relatively small. Therefore, for example, the hollow coil 18 shown in FIG. 1 may be selected and used so that the number of turns thereof is 32 turns, 5 turns, 10 turns, 5 turns, 32 turns in order from the left. The axial thickness of the ring-shaped spacer 20 is 13.5 mm and 5 m in order from the left.
Those with m, 5 mm and 13.5 mm are selectively used.
The number of windings of the hollow coil 18 and the spacer 2
The increase / decrease adjustment with the thickness of 0 is based on the following mathematical formula for obtaining the magnetomotive force. F = 0.4πNi / l where F: magnetomotive force, N: number of windings, i: current value, l: coil length

That is, with the number of windings of the hollow coil 18 and the thickness of the spacer 20 set to the above-mentioned values, as shown in FIG. After the magnet materials are inserted in an aligned manner, a large current of about 6000 A is passed through the hollow coil 18 at once in an extremely short time, so that the rod-shaped multipole magnet 1 conforming to the above-mentioned standard can be obtained.
4 will be manufactured.

FIG. 3 shows a schematic structure of a magnetizing device using the magnetizing coil 16 shown in FIG. 1, in which a plurality of magnetizing coils 16 are vertically arranged on a horizontal substrate 26 at predetermined intervals. Each magnetizing coil 16 is connected to a DC power source having a high current value (not shown) via a switch. Horizontal board 2
An elevating plate 28 is arranged below the plate 6 in parallel therewith, and a lower surface of the elevating plate 28 is fixed to an upper end of a piston rod 32 of a pneumatic cylinder 30 arranged upright. Further, on the upper surface of the elevating plate 28, knockout pins 34 are vertically fixed and positioned correspondingly directly below the respective magnetizing coils 16, and each knockout pin 34 is fixed to the coil body portion 2.
The two through holes 24 face each other so as to be reciprocally movable and stopable at a required position.

That is, in order to magnetize the rod-shaped multipole magnet 14 in multiple poles, the rod-shaped material 14 to be magnetized is inserted into the through hole portion 24 of the coil body 22 from above before energizing the magnetizing coil 16. To do. At this time, since the upper end of the knockout pin 34 faces below the through hole 24, the inserted rod-shaped material 14 is supported by the knockout pin 34. In this state, there is no problem if the expected magnetic pole portions of the rod-shaped material 14 to be magnetized in multiple poles and the hollow coils 18 of the magnetizing coil 16 correspond appropriately.
However, this appropriate response is often not obtained. Therefore, in such a case, by appropriately urging the cylinder 30 forward and backward, the knockout pin 34 is moved up and down together with the lift plate 28 inside each through hole portion 24, and each magnetic pole planned portion of the rod-shaped material 14 and each hollow portion. Appropriately correspond to the coil 18. In this way, by passing a large current through the hollow coil 18 as described above, it is possible to manufacture the rod-shaped multipole magnet 14 that is extremely faithful to the above-mentioned standard.

When the multi-pole magnetization of the rod-shaped multi-pole magnet 14 is completed inside each magnetizing coil 16, the cylinder 30 is urged to extend the piston rod 32 upward. As a result, the lift plate 28 and the knockout pin 34
Moves vertically and causes the upper end of the rod-shaped multi-pole magnet 14 to project upward as shown by the chain double-dashed line in FIG. Therefore, the magnetized rod-shaped multi-pole magnet 14 can be easily taken out from the magnetizing coil 16. The present invention is not limited to a 6-pole magnet, but can be arbitrarily magnetized as long as it has 4 or more poles. Also, the number of magnetizing coils in the magnetizing device is
It can be set arbitrarily.

[0015]

As described above, according to the magnetizing coil of the rod-shaped multipole magnet and the magnetizing device thereof according to the present invention, the number of end face magnetic flux lines in each magnetic pole magnetized in the rod-shaped multipole magnet can be accurately measured. Can be controlled. Further, each magnetic pole portion of the rod-shaped magnet material and each winding portion of the magnetizing coil can be appropriately corresponded to each other, and further, the rod-shaped magnet material set in the magnetizing coil can be efficiently taken out after the magnetization is completed. Has beneficial benefits.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a magnetizing coil according to a preferred embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a magnetizing coil according to a preferred embodiment of the present invention, showing a rod-shaped multipole magnet inserted in a through hole.

FIG. 3 is a schematic configuration diagram of a magnetizing device using the magnetizing coil shown in FIG.

FIG. 4 is an external view of a normal two-pole magnetized rod-shaped magnet.

FIG. 5 is an explanatory view showing a state in which the pole-like magnet magnetized with two poles shown in FIG. 4 may have a metal such as a nail attracted thereto extending in an orthogonal direction or an axial direction with respect to the magnet. Is.

FIG. 6 is a bar-shaped magnet, but has an S pole / N in the axial direction.
A rod-shaped multi-pole magnet in which the polarities of the poles appear alternately,
It is an explanatory view showing that metal, such as a nail adsorbed to this, hardly extends from the magnet.

[Explanation of symbols]

 14 bar-shaped multi-pole magnet 16 magnetizing coil 18 hollow coil 20 ring spacer 22 coil body 24 through hole 34 knockout pin

Claims (2)

[Claims] 1. The polarity is alternately inverted in the axial direction to show a polarity,
The magnetizing coil (16) for magnetizing the rod-shaped multipole magnet (14) is set so that the number of magnetic flux lines of each magnetic pole is set to be large at both ends and relatively small in the middle part. There, a ring-shaped spacer (20) is sequentially interposed between the independent hollow coil (18) and the hollow coil (18) to form a coil main body (22) connected in series, and the coil main body ( Through hole (24) coaxially opened in (22)
The rod-shaped multipole magnet (14) to be magnetized is allowed to be inserted therein, and the number of windings in the hollow coil (18) and the axial thickness of the ring-shaped spacer (20) are set to the rod-shaped multipole. A magnetizing coil for a rod-shaped multi-pole magnet, characterized in that the magnet (14) can be increased or decreased in accordance with the required number of magnetic flux lines in each magnetic pole. 2. The polarity is alternately inverted in the axial direction to show the polarity,
In the magnetizing device for the rod-shaped multi-pole magnet (14), the number of magnetic flux lines of each magnetic pole is set to be large at both ends and relatively small in the middle part. The ring-shaped spacer (20) is sequentially interposed in series between the hollow coil (18) and the hollow coil (18), and the coil main body is formed.
A magnetizing coil that constitutes (22) and allows insertion of a rod-shaped multipole magnet (14) to be magnetized in a through hole (24) that is coaxially opened in the coil body (22). A knockout pin (34) that includes (16) and that can reciprocate and can be stopped at a required position in the through hole (24) in the coil body (22).
Of the rod-shaped multi-pole magnet (14) inserted into the through hole (24) with respect to the coil body (22).
4) Adjustable and the rod-shaped multi-pole magnet (14) after completion of magnetization by the knockout pin (34)
(22) A magnetizing device for a rod-shaped multi-pole magnet, which is configured so as to be projected outward in the axial direction of (22).