JPS62149106A - Magnetizing apparatus - Google Patents

Abstract

PURPOSE:To realize magnetization while readily coping with various sizes of objects to be magnetized or a different number of magnetization polarities, by applying and moving a magnetic head on the object to be magnetized which rotating the object to be magnetized, during the magnetization process, for scanning the surface of the object to be magnetized. CONSTITUTION:A magnetic head 14 is applied on the surface of an object to be magnetized 4 by a support means consisting of a slide unit 13. The surface of the object to be magnetized 4 is scanned consecutively by the rotation given by mounting means consisting of a device 1 for vertically moving a rolling center 2 and of a chuck 3 and by the movement given by moving means consisting of a device 15 for vertically moving the magnetic head and a device 16 for reciprocally moving the same. An angle of rotation of the object to be magnetized 4 is detected by a rotary encoder 18. A magnetizing position and a polarity to be magnetized are thus detected in the real-time mode, and thus a power supply means is allowed to supply a proper power for magnetization to the magnetic head 14, according to the detected results. Accordingly, the body can be magnetized at a predetermined position on its surface with a predetermined polarity.

Description

DETAILED DESCRIPTION OF THE INVENTION (/r) Field of Industrial Application This invention relates primarily to a magnetizing device for a magnet roll for a copying machine.

(B) Conventional technology Conventionally, in this type of magnetizing device, slots corresponding to the number of magnetized poles are formed by wire cutting on the inner surface of a cylindrical material of pure iron, and a celadon coil is attached to each slot. A magnetizing yoke is manufactured by fixing these with an insulator such as epoxy resin, and a pulsed magnetic field is applied to the magnetized object inserted into the yoke by a magnetizing coil to magnetize it. .

(/1) Problems that the invention attempts to solveHowever,
In such conventional magnetizing devices, whenever the dimensions of the magnetized object or the number of magnetized poles change, it is necessary to manufacture a corresponding magnetizing yoke each time, which requires a large amount of time and cost. There was a point.

This invention was made in consideration of such a situation, and the magnetic head rotates 'g1. The object of the present invention is to provide a magnetizing device that can easily respond to changes in the dimensions of a magnetized object and the number of magnetized poles by moving in contact with a magnetized object and magnetizing while scanning the surface of the magnetized object.

B) Means for Solving the Problems This invention provides a means for removably attaching a rod-shaped or cylindrical magnetized body.
and a mounting means rotatably mounted about a shaft, a rotating means for rotating a magnetized object of the mounting means, a magnetic head for magnetizing the magnetized object, and a magnetic head that is elastically attached to the surface of the magnetized object. a supporting means for supporting the magnetic head in contact with the magnet; a moving means for movably mounting the supporting means and sliding the magnetic head in the axial direction on the surface of the magnetized body; and a moving means for movably mounting the supporting means or the moving means. an adjusting means for adjusting the distance between the magnetic head and the surface of the magnetized object, a detection means for detecting the rotation angle of the magnetized object, and a magnetizing power source corresponding to a predetermined rotation angle detected by the detection means. This is a magnetizing device comprising power supply means for supplying power to a magnetic head.

(e) The working magnetic head is brought into contact with the surface of the magnetized material by the supporting means,
The surface of the magnetized body is sequentially scanned by the rotation operation of the mounting means and the movement operation of the moving means. The rotation angle of the magnetized body is detected by a detector, the magnetized position and the polarity to be magnetized are detected in real time, and correspondingly, magnetizing power is supplied from the power supply means to the magnetic head. Therefore, a magnetic pole of a predetermined polarity is magnetized at a predetermined position on the surface of the magnetized body.

(f) Examples Hereinafter, the present invention will be described in detail based on examples shown in the drawings. Note that this invention is not limited to this. FIG. 1 shows an embodiment of the present invention, in which a rolling center vertical movement device (1) equipped with a rolling center (2) is shown.
) and a chuck (3) are installed on the bed (5), and these are equipped with a rod-shaped or cylindrical magnetized body, that is, a magnet roll (4), removably and rotatably about an axis. It constitutes a mounting means. (1a) is a handle that moves the rolling center up and down. Chuck (3
) and the bearing (6) that supports the shaft (7) of the Boo!
J (8), the motor (6), the pulley CLυ fixed to the output shaft of the motor @, and the belt (9) placed between the pulleys (8) αη are rotating means for rotating the magnet roll (4). The slide unit σe is a support means equipped with an air cylinder or a spring to support the magnetic head 0 and bring it into elastic contact with the surface of the magnet roll (4), for example, a linear ball slide LS (
(manufactured by THK ■) is used. Magnetic head vertical movement device I
(15 is a moving means that movably mounts a slide unit (g) and slides the magnetic head Q4) by rotating a handle (15a) in the axial direction on the surface of the magnet roll (4), and moves back and forth. The device αQ is installed on the bed (5), and the magnetic head vertical movement device k (to) is movable in the front and back direction.
4) is an adjusting means for adjusting the distance from the surface by operating the handle (16a). In addition, rotary encoder α
~ is a detection means coupled to the shaft (7) via the compling αη and detects the rotation angle of the magnet roll (4).

FIG. 2 is a block diagram showing the control circuit of the magnetizing device shown in FIG.
This is a power supply means for supplying magnetizing power to the magnetic head in response to a signal from the frequency dividing circuit (4).

In this embodiment, a rotary encoder (8) of 86000P/r is used, and a frequency dividing circuit (
1) outputs 1 pulse for 720 pulses input,
The power amplifier 01 is configured to supply alternating current to the magnetic head α every time a pulse from the frequency dividing circuit (a) is input.

In such a configuration, an unmagnetized magnet roll (
4) Place one end of the shaft of the (diameter 25 fl, length 270 mm, rubber magnet body molded around the outer periphery of a metal shaft) into a chuck (
3) After opening and inserting, close the chuck (3) and stand the magnet roll (4). Next, the rolling center vertical moving device is moved by rotating the handle (la) so that the tip of the rolling center (2) engages with the center of the other end of the shaft of the magnet roll (4), and the rolling center vertical moving device is moved by rotating the handle (la). ) is installed between the chuck (3) and the rolling center (2). Next, the magnetic head vertical moving device OQ is moved to the lower end of the magnet roll (4) by rotating the handle (X5a), and further, the longitudinal moving device CM is moved forward by rotating the handle (16a). magnetic head Q
4 is brought into contact with the outer peripheral surface of the magnet roll (4). Next, when the motor (2) is moved in the Y direction, the rotational force of the motor 04 is transmitted from the pulley αυ to the pulley (8) via the belt (9), causing the magnet roll (4) and the rotary encoder (g) to rotate. do.

At this time, the rotary encoder (g) corresponds to the rotation angle when the magnet roll (4) rotates once.
It outputs a pulse signal, divides it into a frequency dividing circuit, and outputs a 50-pulse signal to the power amplifier α. In response to this signal, the power amplifier (2) alternately supplies 25 positive forward currents and 25 negative currents to the magnetic herad α→.

Therefore, the outer circumferential surface of the magnet roll (4) is magnetized with 50 magnetic poles per rotation at predetermined positions, and the correspondence relationship is maintained even if the rotational speed of the motor (2) changes. Next, while rotating the magnet roll (4), move the magnetic head up and down! When the handle (15a) of 1 (15) is rotated to gradually move the magnetic head α→ upward, the entire outer peripheral surface of the magnet roll (4) is scanned by the magnetic head α from the bottom to the top. 25 N poles and 25 S poles are alternately magnetized distributed in the same direction on the surface.

When the magnetization is completed, the motor (6) is stopped, the back-and-forth moving device is moved backward, the rolling center (2) is moved upward, and the magnet roll (4) is taken out.

If the vertical and longitudinal movement distances of the rolling center are determined by taking into consideration the expected length and outer diameter of the magnetized object, it will be possible to adequately accommodate changes in the length and outer diameter of the magnetized object. Become. Further, the number of magnetic poles to be distributed and magnetized on the outer surface of the magnetized body can be arbitrarily set by adjusting the number of division pulses of the frequency dividing circuit.

It should be noted that the longitudinal movement device [QQ 詔YOBI magnetic head vertical movement device α1] can be easily automated.

In addition, in this embodiment, a magnetic head vertical movement device (t) is used.
A device that moves back and forth! Although it was installed in the US, the slide unit (
(to)) may be installed in the moving section of the magnetic head vertical moving device i4.

Furthermore, the magnetizing device of the present invention can be applied to magnetizing rod-shaped or cylindrical magnetized objects, so even belt-shaped magnetized objects can be fixed by winding them around a suitable cylinder. It can be magnetized using a magnetizing device.

(G) Effects of the Invention According to this invention, the magnetizing device can sufficiently cope with changes in the length and outer diameter of the magnetized object, and the magnetizing device can be adjusted to match the dimensions of the magnetized object. Since manufacturing is not necessary, manufacturing time and man-hours are greatly reduced.

[Brief explanation of drawings]

FIG. 1 is a side view showing an outline of an embodiment of the present invention, and FIG.
The figure is a block diagram showing the control circuit of FIG. (1)...Rolling center vertical movement device, (2)...
... Rolling center, (3) ... Chuck, (4)
... Magnet roll, (6) ... Motor, α cap.
・Slide unit, H...t [to 7t', (IQ・
... Magnetic head vertical movement device, α... Back and forth movement device, (G) ... Rotary encoder.

Claims (1)

[Claims] 1. A mounting means for removably attaching a rod-shaped or cylindrical magnetized body and rotatable about an axis, a rotating means for rotating the magnetized body of the mounting means, and a magnetization for the magnetized body. A magnetic head, a support means for elastically abutting and supporting the magnetic head against the surface of a magnetized object, and a movably mounted support means for sliding the magnetic head in an axial direction on the surface of the magnetized object. a moving means, an adjustment means for movably mounting the supporting means or the moving means and adjusting the distance between the magnetic head and the surface of the magnetized body, a detection means for detecting the rotation angle of the magnetized body, and a detection means for detecting the rotation angle of the magnetized body; A magnetizing device comprising power supply means for supplying magnetizing power to a magnetic head in response to a predetermined rotation angle detected by the magnetic head.