JPH0722063B2 - Winding method and device for toroidal core - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a toroidal core winding method and device, and particularly requires winding on both sides of a fine core window such as a magnetic head for a VTR. The present invention relates to a winding method and apparatus suitable for performing toroidal winding on such a head.

[Conventional technology]

A device for winding a magnetic head for a VTR on both sides of a core window is described in, for example, Japanese Patent Laid-Open No. 59-201406. In this device, one end of the wire is gripped by a gripper and passed through the core window, and then pulled out and rotated by another gripper and passed through the core window again to wind on one side. The other end of the wire rod is gripped on the other side of the core window, and the same operation is repeated to wind the wire.

[Problems to be solved by the invention]

However, in the above-mentioned conventional device, since the gripper grips and releases the winding many times, the mechanism is complicated and the winding speed is low.

SUMMARY OF THE INVENTION An object of the present invention is to provide a winding method and device for a toroidal core, which is highly reliable and has a high winding speed, which enables double-sided winding with a simple mechanism.

[Means for solving problems]

The above object is achieved by rotating the mechanism for holding the core about a window of the core in a plane perpendicular to the line transfer path.

[Action]

The winding device having the above configuration is operated as follows.

Let me make it.

First, the core to be wound is set on the holding portion and positioned at a predetermined position with respect to the wire transfer path. In that state, the wire is fed and the wire is wound around the core a predetermined number of times. Next, the holding portion of the core is turned over by rotating in the plane perpendicular to the transfer path of the wire around the core window. After reversing, it is wound a predetermined number of times in the same manner as above.

The winding can be performed on both sides of the core by the above procedure.

〔Example〕

FIG. 13 is an external view showing a core of a magnetic head used in a VTR. The core 2 is a thin ferrite plate having a thickness of about 0.4 mm and a size of about 2 to 3 mm in length and width. This core 2
A winding window 3 (hereinafter referred to as a core window) of about 0.3 mm × 0.3 mm is formed near the tape sliding surface 2C of the tape winding surface 4C on both sides of the core window 3. A covered electric wire 1 (hereinafter, referred to as a wire) having a core wire diameter of about 0.03 mm is wound. Although the number of turns of this wire 1 varies depending on the product, it is usually about 5 to 10 turns on the left and right, and the specification of the winding method is that one wire is wound left and right in a continuous manner as shown in FIG. It is like that.

An embodiment of the winding device and winding method according to the present invention will be described below with reference to FIGS. 1 to 12.

FIG. 1 is an external perspective view showing the overall configuration of the winding device of this embodiment. As shown in FIG. 1, this device comprises a portion for supporting the core 2 so as to be movable in three directions of XYZ with respect to the base 10 and a core reversing portion 5 for rotating the core 2 around the core window 3. It is composed of a core holding unit 50 and a winding portion 7 for winding the wire 1 around the core 2.

A circular groove 11A is provided on the base 10, and the circular wire guide 11 is constituted by the groove 11A and a cover 12 that covers the groove 11A. A notch 13 is provided in a part of the line guide 11, and the core 2 is arranged so that the line guide 11 at the cut portion of the notch 13 is located on both sides of the core window 3. Rollers 21 and 2 are provided on the wire insertion side of core window 3 of wire guide 11.
1 ', the rollers 22 and 22' on the line feeding side, and the rollers 23 and 23 'and the rollers 24 and 24' in the middle of the circular orbit, and their rotation axes are perpendicular to the plane formed by the line guide 11. like,
In addition, the contacting portion of each roller pair is provided in the line guide 11. A detector 8 for detecting passage of the wire 1 is provided near the core 2. On the wire insertion side of the core 2, a movable guide 40 is provided by cutting out a part of the base 10.

FIG. 2 shows the AA cross section of FIG. A length ε slightly larger than the diameter of the wire 1 with respect to a plane 15 formed on the outside of the plane 14 formed on the inside of the circular groove 11A provided on the base 10.
It has been lowered. Further, a corner 14A of the groove 11A on the plane 14 side is rounded. Furthermore, the groove 11A and the flat surface 14 are covered 12
The portion formed by the groove 11A and the cover 12 is referred to as a line guide 11, and the portion formed by the gap between the flat surface 14 and the cover 12 is referred to as a slit 16.

A rotary shaft 30 of the roller 23 is rotatably supported by the bearing 31 with respect to the base 10, and is connected to a motor 32 provided on the base 10 by a coupling 33. The roller 23 'is rotatably supported by a bearing 36 on a shaft 35 fixed to a swing arm 34. The swing arm 34 is swingably supported by the base 10 by a pin 37, and is connected to a pneumatic cylinder 39 by a pin 38 provided on the swing arm 34. By moving the pneumatic cylinder 39 forward and backward, the pin 37 can be moved from the state in which the roller 23 'is pressed against the roller 23 to the position deviated from the plane 14 as shown by the chain line in the figure. The other three pairs of rollers have the same structure. Further, the roller pair 21.21 'to the roller 24.24' are controlled so as to rotate at the same peripheral speed.

FIG. 3 is a portion BB of the movable type wire guide 40 shown in FIG.
FIG. A groove 41 is formed in the movable wire guide 40, and one end of the groove 41 is aligned with the end of the wire guide 11 on the roller 21.21 'side and the other end is aligned with the core window 3. ing. Further, the shaft 42 of the pneumatic cylinder 43 attached to the base 10 is press-fitted into the movable wire guide 40. When the movable type wire guide 40 is lifted by the pneumatic cylinder 43 via the shaft 42, it hits the cover 12 and the groove 41 is covered with the cover 12 to form a completely closed line guide. Further, when the movable line guide 40 is pulled down by the pneumatic cylinder 43, the movable line guide 40 separates from the cover 12 and creates a gap similar to that of the slit 16.

Next, the details of the core holding portion will be described with reference to FIG. FIG. 4 shows a CC cross section of FIG.

The head base to which the core 2 is attached is pressed and fixed to the rotating body 54 by the top 53 attached to the rod 52 of the air cylinder 51. The rotating body 54 is coupled to the shaft 56 of the motor 55. The center of the shaft 56 of the motor 55 and the center of the core window 3 are aligned with each other. When the rotating body 54 is rotated by the motor 55, the core 2 rotates around the window 3 of the core 2.
Therefore, when the rotating body 54 rotates 180 °, it comes to the position indicated by the chain double-dashed line.

Winding of the magnetic head for the VTR is performed as follows by the winding device having the above configuration.

The winding is roughly divided into three steps. That is, (1) Winding is performed on one side of the core 2 in the state shown by the solid line in FIG.

(2) Next, the motor 55 of the core holding unit 6 is operated to rotate the core 2 by 180 ° about the core window 3. After the rotation, the state shown by the dashed line in FIG. 4 is obtained.

(3) At the position of (2), as in (1),
Wind the part opposite to (1).

Here, each step will be described in detail.

First, FIG. 5 to FIG. 9 show the winding method in step (1) in this embodiment. The time chart is shown in FIG.

FIG. 5 shows a state in the middle of winding. Tip of line 1
1A is in a state of being sandwiched by rollers 23.23 ', and an intermediate portion 1B of the wire 1 is in a slit 16 to form a coil including the winding portion 4 of the core 2 inside. The roller 21 'is in the retracted state. At this time, the movable shape wire guide 40 is in a raised state. The roller and the movable forming guide 40, which are indicated by the alternate long and short dash line below, are in a state of being retracted or lowered to a position deviated from the plane 14 shown in FIG.

As shown in FIG. 6, from the state shown in FIG. 5, the tip 1A of the wire 1 is fed by the roller 23.23 'and guided by the wire guide 11 to proceed to reach the roller 24.24'. Middle part 1 of line 1
The wire loop formed by B is narrowed down toward the winding portion 4 of the core 2. During this time, the movable shape wire guide 40 is in the lowered position, and the slit 16 is provided between the movable shape wire guide 40 and the cover 12 as described with reference to FIG.
Since there is a gap similar to that, it does not become an obstacle to narrowing down.

As shown in FIG. 7, when the detector 8 detects the intermediate portion 1B of the line 1 in the state of FIG. 6, the roller 22 'is retracted, and the roller 21' is returned from the retracted state and pressed against the roller 21.

The intermediate portion 1B of the wire 1 is fed by the rollers 23.23 'and therefore enters the slit 16 from the wire guide 11. Roller 2
By rotating 3.23 ', tension is applied to the middle part 1B of the wire 1 and the wire 1C already wound on the core 2. In this state, the roller 22 'is returned from the retracted state and pressed against the roller 22.
At this time, the movable wire guide 40 is lifted to form a closed guide on the wire insertion side of the core window 3 as shown in FIG. During this time, the tip 1A of the wire 1 is fed by the roller 24.24 'to reach the roller 21.21' and further to the movable forming guide 40.

Then, as shown in FIG. 8, the roller is moved from the state of FIG.
Evacuate 24 '. The tip portion 1A of the wire 1 is sent by the roller 21.21 'and completely guided by the movable wire guide 40 to reach the wire insertion side of the core window 3. At this time, the middle part 1B of the line 1
Is sent by the rollers 21.21 ', so that it enters from the line guide 11 to the slit 16 side.

Further, as shown in FIG. 9, the tip portion 1A of the wire 1 sent from the roller 21.21 'from the state shown in FIG.
The roller 2 on the wire 1C already wound on the winding part 4 of the core 2.
Since the tension is applied by 3.23 ', it does not interfere with this line 1C, and the intermediate portion 1B of the line 1 is a roller 23.23'.
Thus, after exiting the core window 3, it is pulled out of the wire guide 11 and pulled into the slit 16, so that it passes through the core window 3 and advances in the wire guide 11 without interfering with the wire 1B.

The tip 1A of the wire 1 that has passed through the core window 3 has rollers 21.21 ′.
Is further fed by and reaches the roller 22.22 '.

As shown in FIG. 5, the roller is in the state shown in FIG.
23 'is retracted, the roller 24' is returned, and the movable wire guide 40 is pulled down. The intermediate portion 1B of the wire 1 is fed by the rollers 21.21 ', and the winding portion 4 of the core 2 and the roller 2
The large wire including 1'is gradually narrowed down to become a small wire. At this point, the roller 21 'is retracted and the roller 23' is returned. On the other hand, the tip 1A of the wire 1 is a roller 22.2
It is sent by 2 ', guided by the line guide 11 and advances to reach the roller 23.23'.

This completes the winding operation for one winding. Thereafter, the same operation is repeated a predetermined number of times for winding, and the step (1) is completed.
FIG. 12 (a) shows the state after the step (1) is completed, and the winding portion 4R is wound.

Next, step (2) will be described. Step (1)
After the above, the rotating body 54 holding the core 2 is reversed by operating the motor 55. By reversing, the position of the core 2 is changed from the state shown in FIG. 12 (a) to the state shown in FIG. 12 (b). At the time of inversion, since the center of the core window 3 is rotated about the rotation center 57, the wire 1 is not pulled or loosened, and therefore the wire 1 is not cut.

Finally, step (3) will be described. After step (2) is completed, the winding portion 4L is wound. The procedure is the same as step (1). After the completion of this step, the winding is performed as shown in FIG. 12 (c).

By operating the device in the order of steps (1), (2), and (3), windings can be formed on both sides of the core window like a magnetic head for a VTR.

In the present embodiment, the core is inverted clockwise when viewed from the traveling direction of the line, but the present invention is not limited to this. Further, in the present embodiment, the rotating body 54 is first positioned in the state shown by the solid line in FIG. 4, but the present invention is not limited to this, and it may start from the state shown by the two-dot chain line in FIG. Further, the reversal angle is not limited to 180 ° and may be determined according to the shape of the core.

Further, in the present embodiment, as the wire transfer method, the method of feeding the inside of the circular orbit by the roller was used, but the present invention is not limited to this.
For example, a method of gripping a wire with a gripper and transferring the wire,
Any transfer method may be used.

〔The invention's effect〕

According to the present invention, the VTR can be
Since it can be wound on both sides of a fine core window like a magnetic head for use, the wire handling mechanism can be simplified,
There is an effect that a winding device having high reliability and high winding speed can be realized.

[Brief description of drawings]

FIG. 1 is an external perspective view showing an embodiment of a winding device according to the present invention, FIG. 2 is a sectional view showing an AA cross section in FIG. 1, and FIG. 3 is a BB cross section in FIG. Cross section showing
FIG. 4 is a sectional view showing a CC cross section in FIG.
9 to 10 are explanatory views showing the principle of the winding method according to the present invention, FIG. 10 is a time chart showing the timing of the winding operation according to the present invention, FIG. 11 is a sectional view of a wire guide, and FIG. Explanatory diagrams showing the principle of the reversing operation, FIGS. 13 and 14 are diagrams showing a target product of the winding device according to the present invention. 1 ... line, 2 ... core, 3 ... window, 6 ... core holding mechanism, 11 ... line guide, 21-24 '... roller.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Higashi Hitoshi, 292 Yoshida-cho, Totsuka-ku, Yokohama, Kanagawa Pref., Institute of Industrial Science, Hitachi, Ltd. (72) Inventor Yoshiaki Shimazu 1410 Inada, Katsuta, Ibaraki, Japan (56) Reference JP-A 61-188710 (JP, A) JP-A 56-103068 (JP, A) JP-A 62-281316 (JP, A) JP-A 63-58812 ( JP, A)

Claims (2)

[Claims] 1. A wire rod is guided by an annular wire guide, and the wire rod is held by a pair of feed rollers inside and outside the annular wire guide, and is fed along the inside of the annular wire guide. The wire rod separated from the annular wire guide is passed through a slit-shaped wire guide while vertically controlling the wire rod to have a constant height, and the toroidal core is moved up and down to shift the winding position, and one of the cores A winding method for a toroidal core, characterized in that the wire is wound around the core, and after the winding is completed, the core is inverted and the wire is wound around the other side of the core. 2. A toroidal core winding device for winding a wire on a toroidal core, comprising: an annular wire guide formed in an annular shape for guiding the wire; and an inner side and an outer side of the annular wire guide. A plurality of pairs of feed rollers which are provided in pairs and feed the wire rods along the annular line guide, and the wire rods separated from the annular wire guide are vertically regulated to pass through the cores. A slit-shaped line guide wound around the core, a holding mechanism that holds the core, and a rotating mechanism that rotates the holding mechanism around the window of the core, and are configured to wind both sides of the core. And toroidal core winding device.