JPH06208931A - Cutting method of tape - Google Patents

Abstract

PURPOSE:To bond a bobbin accurately at a predetermined position without snaking the end of tape by making a cut in the way of a tape being fed to the bobbin and imparting tension to the tape in the vicinity of a position where the cut of the tape touches the bobbin thereby cutting the tape off along the cut. CONSTITUTION:A tape 1 being fed through a guide 6 is wound, at the leading end thereof, around a bobbin 2 carried on a spindle 5. The tape 1 is wound around the bobbin 2, as required, through rotation of the spindle 5 and when the end-of-winding of the tape 1 arrives at the position of a cutter 3, the cutter 3 is advanced to make a cut (a) in the tape 1. The bobbin 2 is then rotated again through the spindle 5 and when the cut (a) arrives at a position where the cut (a) touches the winding part of the bobbin 2, tension is imparted further to the tape 1 thus cutting the tape 1 off along the cut (a). Consequently, the tape can be wound accurately around the winding part while being overlapped without snaking upto the end thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved method for cutting a tape wound around a bobbin of a coil.

[0002]

2. Description of the Related Art In a coil such as a transformer having a plurality of winding layers, the winding layers are generally insulated from each other by an adhesive tape.

A manufacturing apparatus for manufacturing such a coil is
Therefore, after the wire is wound around the bobbin serving as the core of the coil, the adhesive tape is wound around the winding wire, and the winding of the wire and the winding of the tape are alternately performed. In this case, the operation of winding the tape around the winding is performed by the procedure shown in FIGS. 5 and 6, for example.

That is, first, the tip of the tape 1 is pressed against a bobbin 2 around which a wire is wound to adhere it, and the spindle 5
The tape 1 is wound around the winding portion of the bobbin 2 by the rotation of the bobbin 2 according to. The tape 1 is fed from a feeding mechanism (not shown) through the guide 6 under a predetermined tension to the bobbin 2
Will be sent to. When the tape 1 is wound over a predetermined length, the tape 1 is cut by the cutter 3,
The bobbin 2 is rotated while the end of the cut tape 1 is stroked and pressed against the winding portion by the roller 4.

[0005]

However, in this method, no tension acts on the tape 1 when it is stroked by the stroking roller 4, so that the free end of the tape 1 meanders, as shown in FIG. There is a risk that a part of the tape 1 may ride on the brim-shaped side surface portion 2A of the bobbin 2, and there is a problem that it is difficult to attach the end of the tape 1 onto the winding portion so as to be exactly overlapped. This tendency becomes more remarkable as the tape 1 is thinner.

An object of the present invention is to solve the above problems by improving the method of cutting the tape wound around the bobbin.

[0007]

SUMMARY OF THE INVENTION The present invention is a tape cutting method for cutting the end of a tape wound on a bobbin, in which the starting end of the tape is attached to the bobbin and the tape is wound around the bobbin under a predetermined tension. A cut is made in the middle of the tape supplied to the bobbin with a cutter, and when the cut reaches the vicinity of the contact position with the bobbin, the tape is further tensioned to cut the tape from the cut.

[0008]

In the vicinity of the position where the tape break and the bobbin come into contact, the tape is further tensioned to cut the tape from the break, so that the entire length of the tape is wound around the bobbin under the load of tension until it reaches the cutting portion. Therefore, the end of the tape is accurately adhered to the predetermined position of the bobbin without meandering.

[0009]

1 to 4 show an embodiment of the present invention. In addition,
The structure of the coil manufacturing device is basically the same as that of the conventional example.

As shown in FIG. 1, a tape 1 sent out through a guide 6 to a bobbin 2 mounted on a spindle 5.
Wrap the tip of the. Then, if necessary, the tape 1 is wound around the bobbin 2 by rotating the spindle 5, and when the portion corresponding to the end of winding of the tape 1 reaches the position of the cutter 3, the cutter 3 is advanced to form a cut a in the tape 1. . Unlike the conventional example, the tape 1 is not cut here, and only the cut a is formed.

The bobbin 2 is rotated again via the spindle 5, and when the cut a reaches the vicinity of the contact position with the winding portion of the bobbin 2 as shown in FIG. 3, further tension is applied to the tape 1. The tape 1 is cut from the cut a.

To apply the cutting tension to the tape 1, the tape 1 may be stopped and the bobbin 2 may be continuously rotated, or the rotation of the bobbin 2 may be restricted and the tape 1 may be pulled upward.

In this way, the tape 1 is wound around the bobbin 2 under tension until the cut a reaches the winding portion, so that the tape 1 can be accurately overlapped on the winding portion without meandering to the end. Wrapped around.

The cut a formed on the tape 1 is shown in FIG.
As shown in (A) and (B), it may be one break a ₁ or a plurality of breaks a ₂ . The break a ₁ is formed to fill the width of the tape 1 leaving the connecting portions at both ends, and the break a ₂ is formed in series at a plurality of places leaving the connecting portions at both ends and the middle.

[0015]

As described above, according to the present invention, a cut is made in the middle of the tape supplied to the bobbin with a cutter, and further tension is applied to the tape near the contact position between the cut and the bobbin to cut the tape. Since I decided to disconnect from
The tape can be accurately adhered to a predetermined position on the bobbin without causing the end of the tape to meander.

Further, since the present invention does not require a special member for implementation, it can be applied as it is to the conventional coil manufacturing apparatus.

Therefore, there is an effect of stabilizing the quality of the coil without increasing the cost.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a coil manufacturing apparatus during a tape winding operation showing an embodiment of the present invention.

FIG. 2 is a perspective view of the main part of the coil manufacturing apparatus during the tape winding operation.

FIG. 3 is a vertical cross-sectional view of a tape showing how the tape is cut.

FIG. 4 is a front view of a tape main part showing a shape of a tape break.

FIG. 5 is a perspective view of a main part of a coil manufacturing device during a tape winding operation showing a conventional example.

FIG. 6 is a perspective view of the main part of the coil manufacturing apparatus during the tape winding operation.

FIG. 7 is a front view of a bobbin showing a state of winding the tape according to a conventional example.

[Explanation of symbols]

 1 tape 2 bobbin 3 cutter

Claims (1)

[Claims] 1. A method of cutting a tape for cutting an end of a tape wound around a bobbin, wherein a tape start end is attached to the bobbin, the tape is wound around the bobbin under a predetermined tension, and the tape supplied to the bobbin is A method of cutting a tape, characterized in that a cut is made in the middle of the cut, and when the cut reaches a position near the contact position with the bobbin, the tape is further tensioned to cut the tape from the cut.