JPH06124614A - Tape winding device for wire - Google Patents

Abstract

PURPOSE:To provide a tape winding-up device capable of spirally winding a thin tape at a high speed while keeping stable tension around a traveling wire. CONSTITUTION:Air blowing-out holes 3 are respectively formed on a shaft portion 1a and flange 1b of a reel shaft 1 to be rotated at a speed according to a tape winding diameter by means of a motor 7. Air makes a tape reel 31 float and bears it so as to have a predetermined rotating resistance. An inverted funnel-shaped flier 10. which is rotated at a constant speed by means of another motor 13, is coaxially disposed in the upper portion of the reel shaft 1. A tape 32 inserted into a guide hole 16 formed on the lower portion of the flier 10 travels under a tape cover 17 stuck to the outer surface of the flier 10, and the tape 32 is introduced around a wire rod 21 moving at a constant speed, via a tape winding-up guide 18 and a tape presser, which are rotated together with the flier 10. Accordingly, it is possible to reduce fluctuation of tape tension due to centrifugal force or an adverse effect of wind. Furthermore, an increase or decrease in rotating speed of the tape reel 31 on the reel shaft 1 by the fluctuation of tension can automatically correct an excess or shortage of a tape delivering quantity inevitably caused by rotation control of the motor 7. Consequently, the tension of the tape can become stable all the time, and winding at a high speed can be realized at a constant pitch.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape winding device capable of stably winding a thin tape around a wire material such as an ultrafine wire at a high speed while suppressing fluctuation in tension.

[0002]

2. Description of the Related Art For example, a small-diameter coated electric wire using a twisted conductor is formed by spirally winding a thin tape around the outer circumference of the conductor before covering with a covering. A conventional wire winding device used for this purpose is shown in FIG. In this device, a tape reel 31 is arranged on a rotary table 30, and the motor 30 rotates the table 30 to wind the tape reel around the path line and wind the tape 32 around the running conductor 34. Go.

[0003]

In the conventional tape winding device shown in FIG. 2, while the table is rotating at a low speed, the tape is pulled out from the reel with a low tension and is normally wound around the outer circumference of the conductor. However, since the tape reel is arranged on the rotary table, the centrifugal force acting on the tape reel increases with an increase in the number of rotations of the table, the tape tension becomes excessive, and finally the allowable tension is exceeded and the tape is cut. .

Further, since the tape rising from the tape reel toward the tape winding portion is influenced by the wind due to the table rotation, in order to wind the tape within the permissible tension, the winding rotation speed is low and the influence of the wind is small. You have to turn it around,
Because of this, I couldn't expect high-speed winding.

Further, in order to make the winding pitch of the tape constant, it is necessary to make the moving speed of the conductor and the winding speed of the conductor constant. Along with this, the winding diameter becomes smaller and the weight becomes lighter, and the tape gradually rotates with a small force. Therefore, in constant-speed winding, the feeding tension of the tape decreases and the winding gradually becomes unsatisfactory, so that normal tape winding cannot be performed.

As a measure against the latter problem, the winding pitch is made constant by driving the table and the tape reel by independent motors to make the table rotation constant, and further, the rotation of the tape reel is reduced by the tape winding diameter. It is generally conceivable to reduce the change in the tape feeding speed by suppressing the change in the tape tension due to the change in the winding diameter.

However, if the tape used is an ultra-thin tape of the order of 10 μm, the change of the tape winding diameter per unit time becomes insignificant, so that it is not practical to accurately control the rotation of the tape reel. It is possible, and the tape tension fluctuates due to poor control. Also, the tape tension is
Fluctuations due to the quality of the tape wound on the reel cannot be avoided, and therefore winding with stable tension cannot be expected.

Therefore, an object of the present invention is to eliminate these problems and enable high-speed tape winding with a stable tension.

[0009]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a through hole for allowing a wire rod to pass from bottom to top at the center of a shaft, and a flange for supporting the outer periphery of the shaft portion and the tape reel collar from below. A reel shaft that is rotatably installed in a vertical direction by providing air blowing holes that form air bearings on the surface, an inverted funnel-shaped flyer that is rotatably and concentrically provided on the reel shaft, and an outer surface of the flyer. The tape cover is attached to the flyer, a tape winding guide and a tape retainer provided on the flyer to rotate integrally with the flyer, and a motor for individually rotating the reel shaft and the flyer. Also,
After passing the tape fed from the tape reel mounted on the reel shaft through the guide hole provided in the lower outer peripheral edge of the flyer,
Pass the lower side of the tape cover and guide it onto the wire through the tape winding guide and the tape retainer, and further raise the tape reel by giving a predetermined rotation resistance with the air blown from the blow hole, In this system, the flyer is rotated at a constant speed while passing the wire rod at a predetermined speed, and the reel shaft is rotated at a speed according to the reel winding diameter to wind the tape around the wire rod.

[0010]

Since the passing speed of the wire rod and the rotating speed of the flyer are both constant, tape winding with a constant pitch is guaranteed.

Further, since the reel shaft is rotated at a speed according to the reel winding diameter (the speed is increased as the winding diameter decreases), the change in the tape feeding speed from the reel is reduced.

Further, this alone causes fluctuations in the tape tension due to insufficient rotation control of the reel shaft and other error factors, but in the tape reel floated by air, the tape tension and the rotation resistance of the reel due to air are balanced. By the way, since it tries to follow the rotation of the reel shaft, a change in the tape tension causes a change in the relative speed with respect to the reel shaft. In other words, when the tape feeding amount is insufficient and the tape tension increases, slipping occurs between the reel and the reel shaft, and the tension does not rise above the rotational resistance. Conversely, the tape feeding amount becomes excessive and the tape tension increases. When lowered, the reel does not slip, and the reel rotates at the number of rotations of the reel shaft to increase the tension. Therefore, by the automatic fine adjustment action by the change of the relative speed, the tape tension is always kept at a value almost in balance with the rotation resistance of the reel, and the winding stability is improved.

In addition, the following measures are also effective for high-speed winding with stable tension.

Since the flyer has an inverted funnel shape (conical shape), the influence of wind cutting due to high-speed rotation of the flyer is smaller than that of the arm type flyer, and the fluctuation in tension caused by the disturbance of the tape by the wind generated by the flyer is small. Become.

Further, since the tape is passed under the tape cover, there is no spreading of the tape to the outside due to centrifugal force, and the increase in tape tension due to the wind hitting the tape is prevented.

Further, even if the above measures are taken, some fluctuations in the tape tension are still unavoidable, but since the tape retainer arranged at the winding portion presses the tape at a constant pressure, the tape tension varies at the winding point. The width is insignificant and stable winding is possible.

[0017]

FIG. 1 shows a concrete example of the tape winding device of the present invention. Reference numeral 1 in FIG. 1 denotes a reel shaft having a through hole 2 provided at the center of the shaft. The reel shaft 1 is provided with air blow holes 3 for forming air bearings on the outer periphery of a shaft portion 1a to be inserted into the shaft hole of the tape reel 31 and on the upper surface of a flange 1b that supports the flange of the tape reel, respectively. The bearings 4 are arranged to be rotatably supported by bearings 4. Reference numeral 5 denotes a fixed table, and the air blowing hole on the upper surface of the flange 1b is formed between the fixed table 5 and the table 5. Further, the air blown out from the air blowing hole 3 is supplied from the introduction port 6 provided in the table 5. 7 is a reel shaft 1 via a belt 8 and a pulley 9.
Is a motor for driving.

Reference numeral 10 denotes an inverted funnel-shaped flyer provided concentrically and rotatably on the upper portion of the reel shaft 1, and is driven by a motor 13 connected via a belt 11 and a pulley 12. In the flyer 10, it is difficult to increase the concentricity with the reel shaft 1 in the cantilever structure, so that not only the upper side but also the lower side is supported by the bearing 14 here. In this case, the lower bearing has to be supported by the reel shaft 1, but if the reel shaft is directly supported, the tape reel cannot be replaced. Therefore, the connection piece 15 is attached to the upper end of the reel shaft 1. The inner ring is fixed to the piece 15 by concentrically fitting it in and out. Therefore, the flyer side and the reel shaft side of the device can be relatively separated from each other with the fitting portion between the reel shaft and the connection piece as a boundary, and the reel can be replaced.

Reference numeral 17 denotes a net tape cover that covers the outer surface of the flyer 10. The tape 32 fed from the tape reel 31 is passed through a guide hole 16 provided in the outer peripheral edge of the lower portion of the flyer, and further, the tape cover 17 is covered. It passes under and is guided to the upper part of the flyer.

Reference numeral 18 denotes a tape winding guide which rotates integrally with the flyer, and the tape 32 which has passed through the tape cover 17 is guided through the guide 18 to a tape retainer 19 arranged at the tape winding portion, and is fixed to this tape retainer. It is pressed by pressure and wound around the outer circumference of the wire 21. Reference numeral 20 denotes a tape guide, which also helps prevent the wire rod from swinging.

In the tape winding device constructed as described above, the wire rod 21 is pulled and moved at a constant speed by a capstan (not shown) arranged in front of the pass line, and the flyer 10 is rotated at a constant speed to obtain a constant pitch. Wrap the tape in.

The relation between the wire speed V (m / sec), the flyer rotation speed ω _f (rpm) and the winding pitch P at this time is expressed by the following equation (1).

P = V60 / ω _f (m) (1) Further, the tape 32 is unwound from the reel 31 due to the rotational speed difference between the flyer 10 and the reel 31, but there is no excess or deficiency. In order to make the tape tension constant by performing the above, it is necessary to establish the formula (2) for the flyer rotation speed ω _f , the reel rotation speed ω _R , the tape winding pitch P, the tape winding diameter dt on the reel, and the wire rod diameter dω. There is.

(Ω _f −ω _R ) · 2πdt = ω _f √ {( ² π dω) ² + P ² } ... (2) ω _f in the equation is constant as described above. Also,
P and dω must also be constant in terms of product specifications. Therefore, it is unavoidable to adjust the change in the tape winding diameter dt by adjusting ω _R. However, in the case of an ultra-thin tape, this adjustment is inevitable only by detecting the change in dt and controlling the rotation of the motor 7. There is an error.

However, when the error occurs, the tape tension changes, whereby an air layer is formed between the reel shaft and the tape reel shaft hole, and between the reel shaft flange and the tape reel collar. Tape reel 3 that was raised and floated
The rotation speed of 1 automatically increases or decreases as described in the section of action. Therefore, the error is corrected by the fine adjustment due to this increase / decrease, and ω _R becomes normal. Incidentally, the correction at this time is of a form that actually absorbs the tension fluctuation due to the influence of the wind pressure on the tape between the tape reel 31 and the guide hole 16 and the tension fluctuation due to the bad winding of the tape on the tape reel. Done in. In addition, since the tape retainer 19 further stabilizes the tape tension at the winding portion, high-speed winding with substantially constant tension becomes possible.

As can be seen from the above description, according to the device of the present invention, the tape tension is determined by the rotational resistance applied to the tape reel. On the other hand, the rotation resistance is
It is determined by the supply conditions (pressure and flow rate) of the air that flows between the reel shaft and the reel shaft. Therefore, when more accurate tension control is required, a control device that changes the air supply condition in accordance with the tape reel weight decrease accompanying the tape supply is added to reduce the rotational resistance due to the tape reel weight change. It is desirable to eliminate the change.

[0027]

As described above, the tape winding device of the present invention is not easily affected by the centrifugal force and the wind, and the tape finely adjusted by the automatic fine adjustment action generated between the tape reel floating on the air and the reel shaft. Even if the tape is wound at high speed, the fluctuation of the tape tension is suppressed, and the fluctuation range of the tape tension is further reduced at the winding part. It can be wound at a high speed below, which can greatly contribute to improvement in productivity.

Further, since the winding pitch of the tape and the winding state are constant, the quality of the product can be improved.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention partially broken away.

FIG. 2 is a perspective view showing an outline of a conventional tape winding device.

[Explanation of symbols]

 1 reel shaft 1a shaft part 1b flange 2 through hole 3 air blowing hole 4, 14 bearing 5 table 6 air introduction port 7, 13 motor 8, 11 belt 9, 12 pulley 10 flyer 15 connecting piece 16 guide hole 17 tape cover 18 tape Winding guide 19 Tape retainer 20 Tape guide 21 Wire rod 31 Tape reel 32 Tape

Claims (1)

[Claims] 1. A through hole is provided at the center of the shaft to allow the wire to pass from the bottom to the top, and air is blown out to form an air bearing on the outer periphery of the shaft and the flange surface supporting the tape reel collar from the bottom to rotate the shaft. A reel shaft installed vertically as much as possible, an inverted funnel-shaped flyer rotatably and concentrically provided on the upper part of the reel shaft, a tape cover attached to the outer surface of the flyer, and a flyer installed on the top of the flyer. A tape winding guide and a tape retainer for rotation, and a motor for individually rotating the reel shaft and the flyer are provided, and the tape fed from the tape reel mounted on the reel shaft is provided in a guide hole provided on the outer peripheral edge of the lower part of the flyer. After passing through, pass through the lower side of the tape cover and guide it onto the wire through the tape winding guide and tape retainer, and further blow the tape reel through the blowout hole. The air blown out gives a predetermined rotation resistance to levitate, and in this state, the flyer is rotated at a constant speed while passing the wire rod at a predetermined speed, and the reel shaft is rotated at a speed according to the reel winding diameter to tape the outer circumference of the wire rod. A tape winding device for wound wire.