JPH0610575Y2 - Tape winding device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a tape winding device which, when continuously winding a tape around the surface of a core wire of a traveling electric wire or the like, unwinds while applying tension to the tape. is there.

[Prior Art and Problems Thereof] A tape winding device unwinds and winds a tape on a surface of a core wire of a running electric wire cable or the like with a flyer having a predetermined rotation speed. At this time, the tape tension is given by the friction force generated between the tape pad and the pressing plate by pressing both sides of the tape pad with the pressing plate by the force of the spring.

Here, the tape tension is T, the force of pressing by the spring is W, the effective radius of the tape pad 2 is R, the coefficient of friction between the pressing plate and the tape pad pressing surface is μ, and the point from the center of the tape to the action point a of the friction force is If the distance is r (see FIG. 5), the tape tension T is Given in.

From the equation (1), when the force W pressing the tape pad 2 by the spring is constant, the tape tension T is inversely proportional to the radius R of the tape pad 2, and the tape tension T increases as the tape pad radius R decreases. To do.

Therefore, in order to use one tape pad from the beginning to the end of winding, it is necessary to stop the tape winding device several times and adjust the force for pressing the tape pad so that the tape tension becomes constant. If the adjustment is improper, the finished outer diameter of the wire wound with the tape may be uneven, the tape may be stretched, the ear may be broken, or the tape may be broken in some cases.

As a means for adjusting the tape tension T to a constant value, a taping device that continuously changes the deflection amount of the spring by forming a slightly curved quadratic curve on the pressing surface (Jitsuko Sho 47-120).
No. 31) is proposed.

However, it is difficult to make the tape tension constant by that method, because there are problems associated with various changes in conditions.

The present invention has been made in view of the above points, and an object of the present invention is to provide a tape winding device that makes the tape tension constant by changing the coefficient of friction between the tape pressing plate and the tape pad.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, in the present invention, a tape pad is sandwiched between pressing plates and pressed against each other by a spring to slip the tape pads between the pressing plates while applying tension to the tape to be pulled out. In the device, a plurality of grooves in the radial direction are formed on the tape pad pressing surface of the pressing plate in the circumferential direction, and the forming position and length of each groove are changed to change the number of grooves in the circumferential direction from the outside to the inside. The structure was gradually reduced toward the end.

[Action]

According to the present invention configured as described above, when the tape pad is set, the side surface of the tape pad digs into the groove to increase the friction coefficient μ, but since the number of grooves gradually decreases from the outside to the inside, The coefficient of friction μ between the tape pad and the pressing plate gradually decreases from the outside to the inside.

Therefore, the ratio r / R of the distance r and the radius R of the tape pad from the center of the point of application of the frictional force with the progress of taping is
As the friction coefficient μ gradually increases, the tape tension is kept constant.

〔Example〕

In the figure, 1 is a tape, 2 is a tape pad, 3 and 3 '
Is a holding plate, 4 is a holding surface, 5 is a spring, 6 is a flyer, 7 is a tape guide pin, 8 is a nut for adjusting a holding force,
Reference numeral 9 is an anti-vibration pipe, 10 is a hollow shaft, 11 is a key and a key groove, and 12 is an electric wire and a cable core after taping.

The above construction is the same as the conventional one, and the tension of the tape 1 is set when the tape pad 2 is mounted between the pressing plates 3 and 3 ', the pressing force adjusting nut 8 is screwed in, and the spring 5 is appropriately bent. Given by the force generated.

Next, the groove 13 which is a feature of the present invention is formed on the pressing surface 4 of the pressing plate 3 as shown in FIGS. 2 (a) and 2 (b). If this groove 13 is provided only on one of the pressing plates 3, the pressure contact state with the taping pad 2 is as shown in FIG. 3, and if it is provided on both pressing plates 3, 3 ', it is as shown in FIG. .

Therefore, as the flyer 6 rotates and the tape pad 2 gradually decreases in radius R as the taping progresses, the radius r of the point of action of the frictional force also gradually decreases. But,
Ratio r of the radius r of the point of action of the frictional force and the radius R of the tape pad 2
/ R gradually increases as taping progresses, and r / R = 1 at the end of the tape pad 2 (r = R).

Here, as shown in FIG. 2, the groove 13 is formed on the pressing surface 4,
The side surface of the tape pad 2 bites into the groove 13 and the friction coefficient μ
Since the number of outer grooves 13 is large and the number of inner grooves 13 is small, the taping progresses and the ratio r / the radius r of the point of action of the frictional force to the tape pad radius R /
While R gradually increases, the friction coefficient μ gradually decreases. Therefore, to keep r / R × μ constant,
If the width, depth, and number of the grooves 13 are obtained by experiments, actual operations, etc., a constant tape tension T can always be obtained without changing the pressing force of the tape pad 2 by the spring 5, and smooth taping can be achieved. Can be done.

[Effect of device]

The present invention is configured as described above, and the tape can be wound at a constant tension with the tape tension at the beginning of the tape mounting without stopping the tape winding device until the tape of one tape pad is completely wound. The outer diameter is uniform, there is no breakage or breakage of the tape, and work efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a front view of an essential part of an embodiment of a tape winding device according to the present invention, and FIGS. 2 (a) and 2 (b) are side views of each row of the holding plate of the embodiment, FIG. 3 and FIG. FIG. 4 is a sectional view for explaining the operation of the same embodiment, and FIG. 5 is an explanatory view of the points of frictional force application. 1 ... tape, 2 ... tape pad, 3,3 '... pressing plate, 4 ... pressing surface, 5 ... spring, 6 ... flyer, 8 ... pressing force adjusting nut, 12 ... electric wire, Cable core, 13 ... Groove.

Claims (1)

[Scope of utility model registration request] 1. A tape winding device for applying tension to a tape to be drawn while slipping the tape pad between the holding plates by sandwiching the tape pad between the holding plates and pressing the tape pad, the tape pad holding surface of the holding plate. A plurality of radial grooves are formed in the circumferential direction, the forming position and the length of each groove are changed, and the number of grooves in the circumferential direction is gradually reduced from the outer side to the inner side. Tape winding device.