JPH033866A - Tension device for coil winding machine - Google Patents

Abstract

PURPOSE:To and permit the sure winding treatment free from slack of a wire by constituting the title device so that the turning power of the second rotary disc which is coaxially installed onto the first rotary disc can be transmitted to an arm, according to the necessity to select the intensity of the tension. CONSTITUTION:A lever 26 is pressed by shifting a driving body 8 in the leftward direction, and the engagement between a pin 16 and an engagement part 28 is released and a wire is wound onto a bobbin. At this time, a tension acting onto a wire 4 is only the tension F1 due to the elasticity of a spring 12. When driving body 8 is shifted in the rightward direction after the completion of winding, a turning plate 20 turns in the direction of arrow A, and the engage ment part 28 is engaged with the pin 16, and presses the pin 16 in the direction of arrow A. In this case, the sum of the tension F1 due to the spring 12 and the tension due to a spring 22 which is transmitted to a rotary plate 10 through the rotary plate 20 and the pin 16 acts onto the wire 4. In the state where the large tension acts, the wire 4 is wound onto a terminal or a base, and the wiring treatment free from the floating and slack of the wire 4 can be carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of a tension device for applying a predetermined tension to a wire in an automatic winding machine.

[Conventional technology]

For example, there is a small coil as shown in FIG. This coil includes a bobbin 2 fixed to a base 1 and a plurality of terminals 3, and has a configuration in which the end of a wire 4 wound around the bobbin 2 is wound around the terminal 3.

Such a coil winding operation, that is, a series of steps of winding the wire 4 around the bobbin 2 and further winding the end of the wire around the terminal 3 is performed by an automatic winding machine.

The automatic winding machine performs the winding process by rotating the bobbin 2 while holding the wire 4 unwound from the winding frame with a guide nozzle or the like, or by rotating the guide nozzle around the terminal 3. At this time, in order to accurately wind the wire 4 around the bobbin 2 and the terminal 3, it is necessary to apply a predetermined tension to the wire 4.

FIG. 7 shows an example of the configuration of a tension device in a conventional winding machine. One end of an arm 6 is fixed to a rotary plate 10 rotatably supported on a shaft 5, and a guide roller 7 is attached to the other end of the arm 1.6. The wire 4 unwound from the winding frame or the like passes through a guide lug 7 and is supplied to a winding section such as a guide nozzle (not shown). A spring 12 applies rotational force to the rotating plate 10 in six directions indicated by arrows. Due to this rotational force, a force acts on the arm 6 so that the end on the guide roller 7 side tends to rise. therefore,
When both ends of the wire 4 are held, a tension corresponding to the upward force of the guide roller rough is applied to the wire 4.

[Problem that the invention attempts to solve]

With the configuration of the tension device as shown in FIG. 7, only approximately constant tension can be obtained at all times.

However, when winding a coil using a wire 4 with a slightly thicker wire diameter, it is better to change the magnitude of the tension applied to the wire 4 in two stages.

To explain using the example of the coil shown in FIG. 5, first, when winding the wire onto the hobbin 2, since the bobbin 2 rotates at high speed, it is preferable to apply a small tension. However, when passing the wire 4 through the groove 1a of the base 1 and winding it around the base I,
When winding the wire 4, apply a large amount of tension to the wire 4.
need to be given to If the same small 27" tension as when winding around the bobbin 2 is used, the wire 4 may not come into close contact with the base 1 as shown in FIG. If you are in a state of
There is a problem that the wire 4 easily comes off from the base 1.

SUMMARY OF THE INVENTION Therefore, the present invention seeks to provide a tension device configuration that can easily apply two levels of tension to a wire.

[Failure to solve the problem]

In the present invention, a second rotary plate to which rotational force is applied by a spring is mounted coaxially with a conventional rotary plate, and the rotational force of this second rotary plate can be transmitted to the arm as necessary. be.

〔Example〕

FIG. 1 is a front view showing an embodiment of the tension device of the present invention, and FIG. 2 is a plan view thereof. Components common to those in the conventional example described above are designated by the same reference numerals in these figures, and redundant explanations will be omitted.

The main difference between the tension device of this embodiment and the conventional example shown in FIG. 7 is that a second rotary plate 20 is provided. The rotary plate 20 is rotatably mounted on the same shaft 5 as the rotary plate 10, and has a disk shape with a smaller diameter than the rotary plate 10. Similarly to the rotating plate 10, the rotating plate 20 is given a rotational force in the six directions of arrows by a spring 22. Rotating plate 20
is an engaging portion 28 consisting of a fan-shaped notch on a part of its outer periphery.
When the rotating plate 20 rotates, the retaining portion 28
A protrusion 16 that can be engaged with the rotation plate 10 is provided protruding from the side surface of the rotary plate 10.

This protrusion 16 may be formed by fixing a pin to the rotary plate 10 or the like.

Above the rotary plate 20 is a driving body 8 that moves in the left and right direction in the figure.
A lever 2 fixed to the outer peripheral surface of the rotary plate 20 is provided.
6 can come into contact with the driving body 8. Reference numeral 9 denotes a holder to which one ends of two springs 12 and 22 are fixed. The other ends of the springs 12.22 are connected to the rotary plate 10.
It is connected to a connecting piece 15.25 which is rotatably locked in a groove 14.24 provided on the outer peripheral surface of 20.

Next, the operation of winding the coil shown in FIG. 5 using a winding machine equipped with this tension device will be described.

First, as shown in FIG. 1, by moving the driving body 8 to the left using an air cylinder or the like and pushing the lever 26, the rotary plate 20 is rotated against the spring 22, and the pin 16 and the engaging portion are rotated. 28. In this state, the bobbin 2 is wound. The tension acting on the wire 4 at this time is
Tension F1 due to the elasticity of spring 2 applied via rotary plate 10 and arm 6 as in the conventional example shown in FIG.
Only.

After winding the bobbin 2, the driver 8 is moved rightward to a position where it does not come into contact with the lever 26, as shown in FIG. Then, the rotating plate 20 rotates in the direction of the arrow by the force of the spring 22, and the engaging portion 28 engages with the pin 16, causing the pin 1 to
Press 6 in the direction of the arrow. At this time, the tension acting on the wire 4 is the tension F due to the spring 12,
In addition, the tension F2 by the spring 22 transmitted to the rotary plate 10 via the rotary plate 20 and the bottle 16 is added.

In this way, by winding the wire 4 around the terminal 3 and the base 1 while applying a large tension such as Fl-1-F2, it is possible to wind the wire 4 without lifting or loosening it. Become.

Note that, as shown in FIG. 4, instead of the small-diameter rotary plate 20, a rotary plate 30 having the same dimensions as the rotary plate 10 may be used.

In this case, if springs 12 and 22 are of the same strength, the tension F due to spring 12 is
1 and the tension F2 caused by the spring 22 are approximately equal. Zunawaji, it is possible to obtain a tension device that generates two levels of tension with a strength/weakness ratio of 1=2.

In the embodiment, the protrusion 16 is provided on the rotating plate 10 side, and the protrusion 1
6 is formed on the second rotary plate 20.30 side, but conversely, the engaging portion 28 is formed on the rotary plate 10 and the protruding portion is formed on the rotary plate 20.30]6. Of course, it is also possible to provide a.

〔Effect of the invention〕

According to the present invention, it is possible to extremely easily construct a tension device that can apply tension to a wire in two stages, strong and weak.

The magnitude of the tension F, which corresponds to the wire diameter of the coil, can be adjusted by moving the holder 9 and changing the tension of the spring 12.
also change at the same time, so even in such a case, the ratio of strength to weakness of the tension remains almost constant.

According to an automatic wire winding machine equipped with this tension device, winding can be performed while switching the strength of tension as necessary, so that reliable wire winding processing can be performed without loosening the wire.

[Brief explanation of drawings]

1 is a front view showing one embodiment of the tensioning device of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a front view of the same device in different operating states, and FIG. 4 is another embodiment of the tensioning device. FIG. 5 is a plan view showing an example, FIG. 5 is a perspective view showing an example of the coil, FIG. 6 is an enlarged front view thereof, and FIG. 7 is a front view of a conventional tension device. Wire arm guide roller driver First rotary plate First spring protrusion Second rotary plate Second spring lever engagement portion

Claims (6)

[Claims] (1) An arm having one end fixed to a rotatable first rotary plate, a guide roller attached to the other end of the arm, and a first spring that applies rotational force to the first rotary plate,
In a tension device for a winding machine that applies tension to a wire passed through a guide roller, a second rotary plate is rotatably provided coaxially with a first rotary plate, and the first rotary plate or the second rotary plate is
A protruding portion is formed on one of the rotating plates, and an engaging portion that can be engaged with the protruding portion is formed on the other side, and a second spring applies rotational force to the second rotating plate, and the second A tension device for a winding machine, characterized in that a mechanism is provided for rotating the rotary plate within a predetermined range against a second spring to release the engagement between the protrusion and the engagement portion. (2) The tension of the winding machine according to claim 1, wherein the protruding portion comprises a pin protruding from the side surface of the first rotary plate, and the engaging portion comprises a notch formed on the outer periphery of the second rotary plate. Device. (3) A mechanism that rotates the second rotary plate to release the engagement state between the protrusion and the engaging portion moves linearly with a lever fixed to the second rotary plate. 2. The tension device for a winding machine according to claim 1, comprising a driving body that can come into contact with the winding machine. (4) The tension device for a winding machine according to claim 1, wherein the first rotary plate and the second rotary plate are discs having different diameters. (5) The tension device for a winding machine according to claim 1, wherein the first rotary plate and the second rotary plate are discs having the same diameter. (6) The tension device for a winding machine according to claim 5, wherein springs having substantially the same elasticity are used as the first spring and the second spring.