JPH10233332A - Bank winding method for ignition coil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively prevent a wound coil from sliding down by suppressing the wandering of a coil wire in the opening of a nozzle by using such a nozzle that the diameter of the opening of the nozzle is a specific number of times as large as that of the coil wire. SOLUTION: A nozzle 4 the opening of which has a diameter which is 2-6 times as large as that of a coil wire 3 is used. For example, a nozzle 4 having an opening of 0.1-0.3mm in diameter is used when the coil wire 3 has a diameter of 0.05mm. Since the diameter of the opening of the nozzle 4 is set against the diameter of the wire 3 so that such a minimum clearance that does not cause such a trouble as the jamming, etc., may be secured, the wandering of the coil wire 3 in the opening of the nozzle 4 can be suppressed are the crumbling of a wound coil can be prevented effectively when the wire 3 is wound in the normal and reverse directions by successively spirally piling up the wire 3 while the wire 3 is fed from the nozzle 4 with tension.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for winding a secondary winding in an ignition coil of an engine.

[0002]

2. Description of the Related Art Conventionally, as a secondary winding in an ignition coil of an engine, a coil wire is supplied from a winding nozzle in order to reduce the size and simplify the bobbin while ensuring a dielectric strength between coil layers. The nozzle is reciprocated by a predetermined width while feeding the nozzle in the axial direction at a pitch to the cylindrical bobbin coaxially mounted on the rotating shaft. Bank winding is employed (see Japanese Patent Application Laid-Open No. 60-107813).

[0003]

The problem to be solved is that, due to the special winding method of bank winding, the positional relationship between the nozzle and the position where the coil wire is wound is changed. When the coil wire is wound obliquely while being wrapped in a spiral shape in the normal and reverse directions while supplying the coil wire with a certain tension from the nozzle, the wire diameter becomes significant. 0.05-0.
The reason is that a fine coil element wire of about 07 mm fluctuates at a nozzle portion having a relatively large opening, which causes a coil to collapse.

[0004]

A bank winding of an ignition coil according to the present invention comprises a bobbin coaxially mounted on a rotating shaft while supplying a coil wire with a predetermined tension from a winding nozzle. On the other hand, when the coil wires are wound diagonally while being sequentially spirally stacked in the forward and reverse directions, a nozzle having an opening diameter 2 to 6 times the wire diameter of the coil wire is used. I have.

[0005]

According to the present invention, with respect to the wire diameter of the coil wire,
The nozzle opening diameter is set so as to maintain the minimum clearance that does not hinder clogging etc., so while supplying coil wire with a certain tension from the nozzle, When winding obliquely while successively wrapping in a spiral shape in the normal and reverse directions, it is possible to prevent the coil element wire from swaying in the nozzle opening, thereby effectively preventing the coil from collapsing. .

[0006]

1 to 3 show an example of the configuration of a winding device for specifically implementing a bank winding method for an ignition coil according to the present invention. Here, it has a multi-unit structure in which a plurality of coils can be wound simultaneously.

[0007] As the winding device, basically, a coil element wire 3 which is unwound from a spool 1 in accordance with pulling and is applied with a certain tension by a tensioning machine 2 is passed through a winding nozzle 4. While supplying, rotating shaft 5
The drive unit 8 is driven under the control of the controller 7 with respect to the bobbin 6 coaxially attached to the rotary shaft 5 to rotate the rotary shaft 5 and reciprocate a predetermined width while feeding the nozzle 4 at a pitch in the axial direction. Thus, the coil element wire 3 supplied from the nozzle 4 is obliquely wound while being sequentially spirally stacked in the forward and reverse directions.

FIG. 4 shows that the nozzle 4 is moved in the axial direction by the coil wire 3.
Is sequentially reciprocated by a predetermined width w in accordance with the bank length while being sequentially pitch-shifted by the thickness of the coil wire, so that the coil wire 3 supplied from the nozzle 4 is wound up so that its winding diameter is temporarily increased. It shows a state in which winding is performed diagonally while being sequentially spirally stacked in the reverse direction in which the winding direction and the winding diameter are temporarily reduced.

A plurality of minute concave grooves 9 are formed in the shaft portion of the bobbin 6 in the axial direction to prevent collapse of the coil wound obliquely due to avalanche.

At this time, as shown in FIG. 5, the diameter of the coil wound in a spiral shape changes from the minimum D1 to the maximum D2, and the nozzle 4 and the winding portion (coil wire 3) at the minimum diameter D1. The distance l1 between the winding portion a and the angle θ1 between them is different from the distance l2 between the nozzle 4 and the winding portion b at the maximum diameter D2 and the angle θ2 therebetween.

Therefore, when the bank winding is adopted, simply moving the nozzle 4 in parallel with the winding axis is not sufficient.
The distance l and the angle θ between the nozzle 4 and the winding part around which the coil element wire 3 is wound change, and the tension of the coil element 3 supplied from the nozzle 4 fluctuates, and the coil element 3 is wound. The coil may be loosened or collapsed.

Therefore, under the control of the controller 7, the winding of the coil element wire 3 is controlled so that the distance l between the nozzle 4 and the winding portion which fluctuates according to the winding state of the coil is always constant. The nozzles 4 are moved up and down in synchronization with each other.

Under the control of the controller 7,
In synchronization with the winding of the coil element wire 3, the nozzle 4 is moved right and left so as to be orthogonal to the axis so that the angle θ between the winding portions which fluctuates according to the winding state of the nozzle 4 and the coil is always constant. To make it swing.

The nozzle 4 moves up and down, left and right so that the distance l and the angle θ between the nozzle 4 and the winding portion are always constant according to the winding state of the coil.
, The coil element wire 3 is always supplied with a predetermined tension. Therefore, it is possible to effectively prevent the coil wound around the bobbin 6 from being loosened or broken.

Usually, oil is applied to the coil element wire 3 so that it is smoothly sent out from the spool 1 in accordance with the pulling. Here, the oil-less coil element wire 3 is used. Thereby, when the coil wires 3 are wound obliquely while being spirally stacked, it is possible to prevent slippage between the wires and to prevent the coil from collapsing.

Further, a motor 10 for rotating the spool 1 is provided in order to smoothly feed the oil-less coil wire 3 from the spool 1, and the coil 10 is wound under the control of the controller 7. The spool 1 is rotated in synchronization with the rotation of the spool 1.

Further, a shock absorbing roller 11 is provided between the spool 1 and the tensioning machine 2 so as to absorb a shock generated when the coil element wire 3 is unwound from the spool 1.

Therefore, the rotation of the spool 1 and the rotation of the roller 1
Combined with the buffering by 1, the coil element wire 3 is always supplied from the nozzle 4 with a stable tension, so that a coil with good bank winding without loosening or winding collapse can be obtained.

Here, under the control of the controller 7, when the coil element wire 3 is wound obliquely while being sequentially spirally stacked in the forward and reverse directions, the coil element wire is so formed that the winding diameter is temporarily increased. The number of turns in the reverse direction in which the coil element wire 3 is diagonally wound down so that the winding diameter is temporarily reduced is made greater than the number of turns in the forward direction in which the coil wire 3 is wound up diagonally.

At this time, for example, when the number of turns in the forward direction is 50 turns, the number of turns in the reverse direction is about 53 to 58 turns.

However, the coil wire 3 is obliquely wound down and the number of turns in the reverse direction is large, so that the foundation of the coil slope is stabilized. Can be wound up diagonally, and the coil can be prevented from avalanchely winding from the foundation during winding.

[0022] This is especially true in the case where a method of winding a coil without loosening while preventing the tension of the coil wire 3 supplied from the nozzle 4 from fluctuating is adopted, particularly when the coil is wound. Collapse can be effectively prevented.

As shown in FIG. 4, when a small groove 9 is formed in the shaft of the bobbin 6, the groove 9 is formed.
By inserting the number of turns increased in the positive direction into the inside, it is possible to more effectively prevent the coil from breaking in an avalanche shape during winding.

In such a case, in particular, in the present invention, the nozzle 4 having an opening diameter of 2 to 6 times the wire diameter of the coil wire 3 is used.

At this time, for example, when the coil element wire 3 having a wire diameter of 0.05 mm is used, the opening diameter is 0.1 to 0.3 mm.
Is used.

Thus, for the wire diameter of the coil wire 3,
Since the opening diameter of the nozzle 4 is set so as to maintain a minimum clearance that does not cause a problem such as clogging, the coil wire 3 to which a certain tension is applied is supplied from the nozzle 4 while the coil 4 is supplied. When the wires are obliquely wound while being sequentially spirally wound in the normal and reverse directions, the coil wires 3 are prevented from swaying in the opening of the nozzle 4 and the coil collapse is effectively prevented. Can be prevented.

[0027]

As described above, according to the bank winding method of the ignition coil according to the present invention, a coil wire with a fixed tension is supplied from a nozzle having an opening diameter of 2 to 6 times the wire diameter. The coil wire is obliquely wound on the bobbin coaxially mounted on the rotation shaft while being sequentially spirally stacked in the normal and reverse directions. There is an advantage that fluctuations in the inside can be suppressed, and winding collapse of the coil can be effectively prevented.

[Brief description of the drawings]

FIG. 1 is a side view showing a configuration example of a winding device for specifically implementing a bank winding method of an ignition coil according to the present invention.

FIG. 2 is a front view of the winding device in the configuration example.

FIG. 3 is a perspective view of a winding device in the configuration example.

FIG. 4 is a front view showing a winding state of a coil by bank winding.

FIG. 5 is a side view showing a winding state of a coil by bank winding.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spool 2 Tension machine 3 Coil wire 4 Nozzle 5 Rotating shaft 6 Bobbin 7 Controller 8 Drive unit 10 Motor 11 Buffer roller

Claims (1)

[Claims] 1. A coil wire to which a constant tension is applied is supplied from a nozzle for winding, and the coil wire is sequentially fed to a bobbin coaxially mounted on a rotating shaft in a forward direction and a reverse direction. In a bank winding method of an ignition coil, which is wound obliquely while being spirally stacked, a nozzle having an opening diameter of 2 to 6 times the wire diameter of the coil wire is used. Bank winding method.