JPH07211572A - Film winding mechanism for winding machine - Google Patents

Abstract

PURPOSE:To obtain a film winding mechanism in which a more reasonable treatment method is used by a method wherein the tip of a film is pulled out by a main nip and the film is cut in a state that a tension nip has gripped the film in a prescribed position. CONSTITUTION:A film winding mechanism for a winding machine is provided with a main nip 13 which grips the tip of a film 7 and with a means 18 which moves the main nip 13 to a prescribed direction. In addition, it is provided with a tension nip by which the film 7 pulled out by the main nip 13 is gripped in a prescribed position and with a cutter 15 which cuts the film 7 on the side of a reel 8 from the tension nip. In addition, it is provided with a means by which the tension nip which has gripped the film 7 is moved to a prescribed direction integrally with the main nip 13 and with a means by which the tension nip which has released the film 7 is returned to a prescribed position. Thereby, the time required for a film winding operation is shortened, and the operating efficiency of the film winding mechanism can be enhanced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a film winding mechanism for winding an insulating film around a coil bobbin in preparation for a coil winding machine such as a flyback transformer.

[0002]

2. Description of the Related Art For a coil such as a flyback transformer, an insulating film is wound on the winding of a coil bobbin, wound on the film, and then an insulating film is wound on the winding. There is one that is manufactured by alternately winding a film. As such a film winding method, for example, JP-A-5-10
1961 is known.

This is a method of using an insulating film with two opening / closing members, a front nip and a rear nip.
According to this method, first, the front end of the insulating film wound on the reel is grasped by the front nip, the film is pulled out from the reel, and the front end of the film is locked to the bobbin. Next, the front nip is returned to the vicinity of the film cutting position, the front and rear of the cutting portion are grasped by the rear nip and the front nip, the film is cut by the cutter, and the bobbin is rotated to wind the film around the bobbin. At this time, the rear nip grips the trailing end of the film being wound and applies a predetermined tension to the film, so that the film is wound around the bobbin without slack.

[0004]

In this winding method, since the film is cut after the front end of the film is locked to the bobbin, the winding length of the film is determined by the distance between the cutter and the bobbin. Therefore, the film winding position of the bobbin must be changed to change the winding length, but it is necessary to make sure that the film winding work does not interfere with other members. Was not easy.

Further, from the viewpoint of work efficiency, it is desirable that the film is previously cut into a predetermined length, and only winding is performed after the winding work. However, in this winding method, since the film is cut after the front end of the film is locked to the bobbin, the film cannot be cut in advance, and there is a problem that the work efficiency is correspondingly low.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a film winding mechanism using a more rational processing method.

[0007]

SUMMARY OF THE INVENTION The present invention provides a film winding mechanism for a winding machine for winding a film supplied from a reel on a rotating coil bobbin in preparation for a winding machine for winding a winding wire on a rotating coil bobbin. , A main nip for holding the leading edge of the film, a means for moving the main nip in a predetermined direction, a tension nip for holding the film drawn into the main nip at a predetermined position, and cutting the film from the tension nip on the reel side. The cutter includes a cutter, a means for moving the tension nip holding the film together with the main nip in the predetermined direction, and a means for returning the tension nip releasing the film to the predetermined position.

Further, the means for moving the tension nip holding the film in the predetermined direction integrally with the main nip is composed of a moving means for the main nip and a guide for supporting the tension nip so that the tension nip is freely displaced in the predetermined direction. The means for returning the tension nip which has been released to the predetermined position is constituted by means for urging the tension nip toward the predetermined position and the guide.

In this case, the urging means is composed of, for example, an air cylinder and a mechanism for supplying air to the air cylinder.

Alternatively, it is composed of a belt wound around two pulleys arranged in the vertical direction and a counterweight connected to this belt, and a tension nip is connected to this belt.

Further, according to the present invention, the tip of the film is gripped in the film winding mechanism of the winding machine for winding the film supplied from the reel on the rotating coil bobbin in preparation for the winding machine for winding the wire for winding on the coil bobbin. The main nip, a means for moving the main nip in a predetermined direction, a tension nip for holding the film drawn out to the main nip at a predetermined position, a cutter for cutting the film from the tension nip on the reel side, and a tension nip A guide for freely displacing in a predetermined direction, means for urging the tension nip toward the predetermined position, and a mechanism for adjusting the angle of the guide are provided.

The present invention is a film winding mechanism of a winding machine for winding a film supplied from a reel on a rotating coil bobbin in preparation for a winding machine for winding a wire for winding on a coil bobbin. A nip and a means for moving the main nip in a predetermined direction,
A tension nip for holding the film drawn out to the main nip at a predetermined position, a cutter for cutting the film from the tension nip on the reel side, and a means for moving the tension nip holding the film together with the main nip in the predetermined direction. A means for returning the tension nip, which has released the film, to the predetermined position, and a means for moving the coil bobbin.

[0013]

[Function] Prior to the winding of the film, the main nip pulls out the leading end of the film and the tension nip holds the film at a predetermined position to cut the film. Therefore, the film is cut in parallel with the winding work on the coil bobbin. You can do it.

If the length of the film drawn by the main nip is changed, the cut length of the film is changed. After cutting, the main nip is moved as necessary to move the leading edge of the film to the winding position on the coil bobbin.At this time, the tension nip holding the trailing edge of the film moves integrally, and the trailing edge of the film is moved until the winding operation is completed. Holds stably.

The means for moving the main nip holding the film in the predetermined direction together with the tension nip is composed of a moving means for the main nip and a guide for freely supporting the tension nip in the predetermined direction. By configuring the mechanism for returning the released tension nip to the predetermined position by means for urging the tension nip toward the predetermined position, an independent tension nip driving means is unnecessary, and the above-mentioned operation is simplified. Can be achieved.

Further, by forming the biasing means by the air cylinder and the air supply mechanism, the tension nip can be biased with a constant force regardless of the moving position.

Alternatively, even if the biasing means is composed of a belt and a counterweight and the tension nip is connected to the belt, the tension nip can be similarly biased with a constant force.

Further, by providing a mechanism for adjusting the angle of the guide within a slight range, it becomes possible to correct the deviation of the wound film in the direction of the rotation axis of the coil bobbin.

Further, by providing the mechanism for moving the coil bobbin, the film can be always wound around the coil bobbin at the same position regardless of the change of the outer diameter of the coil bobbin accompanying the winding of the film.

[0020]

1 to 5 show an embodiment of the present invention.

FIG. 1 shows an automatic winding machine for winding a coil bobbin 1 and winding a film 7.

This automatic winding machine is provided with a spindle 3 supported by a moving mechanism 4, a nozzle 5 for feeding a wire rod, and a conveyor 6 for carrying a coil bobbin 1 on a main body 12. The automatic winding machine mounts the coil bobbin 1 on the spindle 3 by moving the spindle 3 with the moving mechanism 4 with respect to the coil bobbin 1 conveyed onto the main body 12 by the conveyor 6. Then, after the end of the wire rod supplied from the nozzle 5 is locked to a predetermined portion of the coil bobbin 1, the spindle 3 is rotated to wind the wire rod sent out from the nozzle 5 around the coil bobbin 1.

An insulating film 7 is wound around the coil bobbin 1 for each layer of the winding. For this purpose, the automatic winding machine is equipped with a reel 8 for supplying the film 7 on top of the main body 12. A film punch 9 that forms a notch in the film 7 delivered from the reel 8 and an embossing portion 10 that corrugates the film 7 are attached to the main body 12.

Below the embossed portion 10, a main nip 13 for holding the film 7, a tension nip 14, and a cutter 15 are provided.

The main nip 13 is a bifurcated opening / closing member that opens and closes in response to the driving of the air cylinder 20, and an arm 17 that is screwed onto a vertical spindle 16 provided on the main body 12.
It is vertically supported and is displaced up and down according to the operation of the motor 18 coupled to the spindle 16. The spindle 16 and the motor 18 form a moving means of the main nip 13. The main nip 13 further drives the spindle 3 within a predetermined range in response to the driving of an air recinder 19 provided between it and the arm 17.
And move substantially parallel to. The tension nip 14 is a member similar to the main nip 13 that projects obliquely downward from the main body 12 as shown in FIGS.
It is attached to a bracket 32 which is vertically displaceably guided. The bracket 32 is connected to the air cylinder 21 as a biasing means. The air cylinder 21 is urged in the contracting direction by the compressed air inside, and in the most contracted state, the tension nip 14 is moved to the cutter 1 as shown by the solid line in FIG.
Hold it at the start position just below 5. Air cylinder 21
A low pressure and a high pressure compressed air supply mechanism 23 is connected to. The tension nip 14 is provided with an air cylinder 24 for opening and closing the opening / closing member at the leading end, and the opening / closing member holds the film 7 from the side opposite to the main nip 13.
The main nip 13 and the tension nip 14 are formed in such a size that their tips do not intersect so that the main nip 13 can rise above the tension nip 14.

As shown in FIG. 3, the guide 22 is formed integrally with a guide base 41 rotatably supported by the main body 12 via a fulcrum 40. The guide 22 is provided on the upper end of the guide base 41.
An adjusting screw 42 is screwed as a tilt adjusting mechanism. The tip of the adjusting screw 42 penetrates the guide base 41 and comes into contact with the main body 12, and inclines the guide base 41 about the fulcrum 40 from the upright position to the front and back in a slight angular range in accordance with the rotation operation.

The moving means of the main nip 13 including the spindle 16 and the motor 18 and the guide 22 are
A means for moving the tension nip 14 holding the film 7 integrally with the main nip 13 is configured.

The cutter 15 is provided immediately below the embossed portion 10 and cuts the film 7 by sandwiching the film 7 from both sides according to the driving of two air cylinders 25. Cutter 15
Is a blade 15 for cutting the film 7 as shown in FIG.
A and a pressing member 15 that is biased by a spring 34 that presses the film 7 above the blade 15A.
In addition, as shown in FIG.
The film 7 is arranged substantially parallel to the opening / closing member and the film 7 is cut obliquely from the horizontal direction. Further, the cutter 15 is designed so as to have an interval through which the main nip 13 can pass in the opened state.

A welding head 26 for welding the tip of the film 7 held in the main nip 13 to the coil bobbin 1 at the bottom of the main body 12, and the film 7 at the coil bobbin 1
A film retainer 27 to be pressed against is provided. The film presser 27 presses the leading end or the terminal end of the film 7 against the outer peripheral portion of the coil bobbin 1, and the welding head 26 contacts and heats the main portion of the film 7, thereby welding the main portion of the film 7 to the coil bobbin 1. The welding head 26 and the film retainer 27 are supported by the main body 12 via a drive mechanism required for these operations.

Next, the operation will be described.

In this winding machine, the film punch 9 and the embossing section 10 process the film 7 and the cutter 15 cuts the film 7 in parallel with the winding operation.

To this end, the main nip 13 is connected to the motor 1
In operation 8, the film 7 is lifted up to just below the embossed portion 10 to grip the leading edge of the film 7. At this time, the cutter 15 is held in the open state, and the main nip 13 is held by the cutter 15.
To reach the gripping position. Here, the film 7 is gripped by driving the air cylinder 20, and the motor 18 is operated again to lower the main nip 13 to a predetermined position. Along with this, the film 7 is delivered from the reel 8.

When the main nip 13 reaches a predetermined position, the tension nip 14 holds the film 7 directly below the cutter 15 by driving the air cylinder 24, and the cutter 15 cuts the film 7 by driving the air cylinder 25.

The processing of the film 7 by the film punch 9 and the embossing section 10 is performed prior to the drawing of the film 7 by the main nip 13, but the operation of the main nip 13 is stopped while the main nip 13 is drawing the film 7. Then, the film punch 9 and the embossing section 10
Can also be driven, and by doing so, any part of the film 7 can be processed. Similarly, the cutting length of the film 7 can be arbitrarily set by changing the stop position of the main nip 13.

The leading and trailing ends of the cut film 7 are gripped by the main nip 13 and the tension nip 14, respectively, and thereafter the entire film 7 moves according to the movement of the main nip 13 by the operation of the motor 18. At this time, low pressure air is supplied to the air cylinder 21 of the tension nip 14 from the compressed air supply mechanism 23, and the tension nip 1
4 is displaced against the contracting force of the air cylinder 21 while exerting a predetermined weak tension on the film 7. By the compressed air supply mechanism 23 keeping the supply pressure to the air cylinder 21 constant, the tension of the film 7 is also kept constant regardless of the displacement position.

The main nip 13 stops descending when the leading edge of the film 7 reaches the side of the coil bobbin 1.

All the operations up to this point are performed in parallel with the work of winding the coil bobbin 1.

Coil bobbin 1 which has completed the winding work for one layer
Is laterally moved while being mounted on the spindle 3 by driving the moving mechanism 4, and comes into lateral contact with the leading end of the film 7 held in the main nip 13. In this state, the film presser 27 presses the film 7 against the coil bobbin 1,
The welding head 26 heats the contact portion from above the film 7 and welds it to the outer periphery of the coil bobbin 1.

Next, the main nip 13 is released and the spindle 3 is rotationally driven to wind the film 7 whose front end is locked to the coil bobbin 1 around the coil bobbin 1. Film 7
The air cylinder 21 of the tension nip 14, which grips the rear end of the rear end, is still kept at a low pressure. This is to prevent an excessive tension from being applied to the film 7 immediately after the welding, and after the winding is advanced to some extent, the air cylinder 21 is switched to a high pressure to increase the tension of the film 7, so that the film 7 is wound on the coil bobbin 1. Can be wrapped around without slack.

Since the tension nip 14 descends along the guide 22 while holding the rear end of the film 7, the film 7 is not likely to be displaced or meandered on the way, and the coil bobbin can be accurately moved to the rear end. Wrapped around 1.

The inclination of the guide 22 can be adjusted by the adjusting screw 42. When the adjusting screw 42 is rotated, the grip position of the film 7 by the tension nip 14 changes. Tension nip 14
Moves while being guided by the guide 22, but the base end of the guide 22 is located in the vicinity of the fulcrum 40, and therefore its position is substantially constant regardless of the operation of the adjusting screw 42. Therefore, the angle formed by the film 7 and the rotation axis of the coil bobbin 3 from the winding position to the tension nip 14 slightly changes according to the rotating operation of the adjusting screw 42. Therefore, when the film 7 is biased to one side of the coil bobbin 1 as the winding progresses, it is possible to easily correct the lateral shift of the film 7 wound around the coil bobbin 1 by rotating the adjusting screw 42. Is possible.

When the winding is completed, the tension nip 14 is released, the film presser 27 is driven again to press the rear end of the film 7 against the coil bobbin 1, and the welding head 26 causes the main part of the rear end of the film 7 to move to the coil bobbin 1. Weld to the outer periphery. On the other hand, the tension nip 14 that has released the film 7 is urged upward by the air cylinder 21 in a high pressure state, so that the tension nip 14 is quickly pulled up to the start position immediately below the cutter 15.

By this, the winding of the film 7 is completed, and the coil bobbin 1 is moved to the winding position again to wind the next layer on the film 7.

In this way, the cutting and processing work of the film 7 is performed in parallel with the winding process, and only the substantial winding work is performed in the film winding process.
The time required for winding is reduced, and the coil can be manufactured efficiently.

The outer diameter of the coil bobbin 1 changes depending on the layer around which the film 7 is wound. However, in this winding machine, since the spindle 3 is configured to move by the moving mechanism 4, the outer diameter of the coil bobbin 1 changes according to the change of the outer diameter. The welding position of the film 7 can be kept constant by changing the position of the spindle 3 by means of the above. Further, also when the work is performed on the coil bohine having different outer diameters, the welding position of the film 7 can be kept constant in the same manner.

FIG. 5 shows another embodiment relating to the biasing means of the tension nip 14. In this embodiment, a belt 30 and a counterweight 33 are used instead of the air cylinder 21.

The belt 30 is wound around the upper and lower pulleys 31, and the tension nip 14 is attached to the belt 30 via a bracket 32 guided by the guide rail 22. The counter weight 33 is set to have a weight slightly larger than the total weight of the tension nip 14 and the bracket 32, and the belt 30 is provided on the opposite side of the tension nip 14.
Attached to. The mounting position of the counterweight 33 is set so that the position where the counterweight 33 is most lowered is the film gripping position of the tension nip 14.

In this embodiment, when the main nip 13 grips the cut film 7 and descends, the counterweight 33 gives resistance to the displacement of the tension nip 14 that follows, so that the film 7 is given a predetermined amount. Exerts tension. In addition, the tension nip 14 that has released the film 7 balances the weight with the counterweight 33,
It is automatically pulled up to the start position just below the cutter 15. In this case, compared with the case where the biasing means of the tension nip 14 is composed of the air cylinder 21 and the compressed air supply mechanism 23, the structure can be made simpler and cheaper.

In each of the above embodiments, the tension nip 14 does not have its own moving means, and when the film 7 is held, it is guided by the guide 22 and follows the movement of the main nip 13 to release the film 7. It is configured to return to a predetermined position by the biasing means in the state of
The tension nip 14 may be provided with independent moving means similar to the main nip 13, and a control mechanism for synchronizing the driving of these moving means may be provided.

[0050]

As described above, according to the present invention, the cutter cuts the film while the main nip pulls out the leading end of the film and the tension nip holds the film at a predetermined position. The film can be cut. Therefore, there is an effect that the time required for the film winding work is shortened and the work efficiency is improved.

Further, the cutting length of the film can be easily changed only by changing the drawing position of the film by the main nip.

Further, by providing a guide for guiding the tension nip and a mechanism for adjusting the angle of the guide within a slight range, it is possible to easily correct the lateral displacement of the film to be wound.

Further, by providing the coil bobbin moving means, the film can be always wound at the same position regardless of the change of the outer diameter of the coil bobbin.

Therefore, the work precision and work efficiency of the film winding work can be improved with a simple structure, and the ability to cope with coils having different specifications is also improved.

[Brief description of drawings]

FIG. 1 is a perspective view of an automatic winding machine showing an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a main part of a cutter.

FIG. 3 is an enlarged side view of a tension nip.

FIG. 4 is an enlarged front view of the same.

FIG. 5 is an enlarged front view of a tension nip showing another embodiment.

[Explanation of symbols]

 1 Coil Bobbin 4 Moving Mechanism 5 Nozzle 7 Film 8 Reel 13 Main Nip 14 Tension Nip 15 Cutter 16 Spindle 18 Motor 21 Air Cylinder 22 Guide 23 Compressed Air Supply Mechanism 30 Belt 31 Pulley 33 Counterweight 42 Adjusting Screw

Claims (6)

[Claims] 1. A film winding mechanism of a winding machine for winding a film supplied from a reel on a rotating coil bobbin in preparation for a winding machine for winding a wire for winding on a coil bobbin, and a main nip for holding a tip of the film. ,
The means for moving the main nip in a predetermined direction, the tension nip for holding the film drawn out to the main nip at a predetermined position, the cutter for cutting the film on the reel side from the tension nip, and the tension nip for holding the film A film winding mechanism for a winding machine, comprising: a means for moving in the predetermined direction integrally with the nip; and a means for returning the tension nip that has released the film to the predetermined position. 2. A means for moving the tension nip holding the film in the predetermined direction integrally with the main nip is composed of a moving means for the main nip and a guide for movably supporting the tension nip in the predetermined direction. 2. The film winding mechanism for the winding machine according to claim 1, wherein the means for returning the tension nip, which has been released, to the predetermined position is constituted by means for urging the tension nip toward the predetermined position and the guide. 3. A film winding mechanism for a winding machine according to claim 2, wherein the urging means is an air cylinder and a mechanism for supplying air to the air cylinder. 4. The belt, wherein the urging means is a belt wound around two vertically arranged pulleys, and a counterweight connected to the belt, and a tension nip is connected to the belt. Film winding mechanism of wire winding machine. 5. A film winding mechanism for a winding machine for winding a film supplied from a reel on a rotating coil bobbin in preparation for a winding machine for winding a wire for winding on a coil bobbin, and a main nip for gripping the tip of the film. ,
A means for moving the main nip in a predetermined direction, a tension nip that holds the film drawn out to the main nip at a predetermined position, a cutter that cuts the film on the reel side from the tension nip, and the tension nip is displaced in the predetermined direction. A film winding mechanism for a winding machine, comprising: a freely supporting guide, a means for urging the tension nip toward the predetermined position, and a mechanism for adjusting the angle of the guide. 6. A film winding mechanism for a winding machine for winding a film supplied from a reel on a rotating coil bobbin in preparation for a winding machine for winding a wire for winding on a coil bobbin, and a main nip for holding a tip of the film. ,
The means for moving the main nip in a predetermined direction, the tension nip for holding the film drawn out to the main nip at a predetermined position, the cutter for cutting the film on the reel side from the tension nip, and the tension nip for holding the film A film winding mechanism for a winding machine, comprising: a unit for moving in the predetermined direction integrally with the nip, a unit for returning the tension nip that has released the film to the predetermined position, and a unit for moving the coil bobbin. .