JP2001006461A - Automatic tape winding method and apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To always secure a constant tape width and wrap a tape around a connection portion of a power cable so as to form a highly reliable connection portion having more excellent appearance and less encapsulation voids. To SOLUTION: A connection portion S of an electric power cable is provided at an upper portion of a column erected on both right and left sides of a base, and a moving member 13 provided between the columns so as to be reciprocally movable is provided with a hollow provided on a concentric circle with the connection portion S. A rotating body 35 is provided around the cylindrical member 29. A tape reel 53, a tension roller 69, and the like are provided on the outer periphery of the rotating body. A tape width detecting sensor 77 is provided in the vicinity of the tape running path passing through the tension roller 69 to detect the actual tape width W. The actual tape width W is compared with the set tape width W _0, and based on the result, the brake 75 of the tension roller 69 is controlled to always suppress the fluctuation of the tape width as much as possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic tape winding method and an apparatus for winding a tape as a reinforcing insulating layer around a connection portion of a power cable.

[0002]

2. Description of the Related Art FIG.
As shown in FIG. 3, the ends of the power cables 103 and 105 are cut into a tapered shape, and the exposed conductors 103 are cut.
A and 105A are connected to each other to form the inner semiconductive layer 107.
Then, a tape is wound around the outer periphery to form the reinforcing insulating layer 109, and then the outer semiconductive layer 111 is formed.

[0003] In this manner, the tape is wound to form the reinforcing insulating layer 1.
As a method for forming the 09, (A) TJ (Tape Join) in which a cross-linked EPR tape is wound around to form a reinforcing insulating layer.
t), (B) TMJ in which a reinforcing insulating layer is formed by heating mold after winding a PE tape containing a crosslinking agent.
Three types are known: (Tape Molded Joint) and (C) RMJ (Ruben Molded Joint) which forms a reinforcing insulating layer by heating after winding an EPR tape containing a crosslinking agent.

[0004] All of the above three types of connection portions are wound with a tape using an automatic tape winding device. Then, this automatic tape winding device sends out the tape while rotating on the concentric circle of the connection portion of the power cable, and automatically winds the tape around the connection portion which is the construction portion while maintaining a constant number of rotations. Moreover, the tape moves at a constant pitch in the longitudinal direction of the connecting portion, and winds the tape into a desired shape while reciprocating in a required range.

[0005] The moving pitch of the automatic tape winding device depends on the width of the tape to be wound, and is ideally １ ／ of the tape width.
Is set to wrap. This tape width is determined by adjusting the tension applied between the tape feeding portion (reel) and the winding position. Conventionally, a necessary tension has been calculated from the relationship between the elongation and the tension of the tape, the resistance of a tape feeding section (reel section) on the sending side has been adjusted to determine the tension, and the tape has been wound.

[0006]

When the tape is wound around the connection portion of the power cable with a constant tension, the width of the tape cannot be kept constant for the following reasons.
There is a problem that the width of the wound tape tends to vary.

(1) The distance from the tape feeding portion (reel portion) to the winding point of the connection portion of the power cable differs between the beginning and the end of the tape feeding portion.

(2) When the tape is wound at a constant rotational speed on the sleeve at the center of the connection portion of the power cable and at the outermost diameter portion, the feeding speed of the tape is increased at the outer peripheral portion due to the longer outer periphery.

(3) The distance from the feeding portion (reel portion) to the winding point of the connection portion differs between the outer diameter portion and the sleeve at the center of the connection portion of the power cable.

The automatic tape winding device is adjusted so as to have a pitch of 1/2 wrap with an appropriate tape width, and the lap interval between tapes fluctuates due to the fluctuation of the tape width. The tape is wound in half in order to minimize and reduce voids (triangular voids) having a triangular cross section formed on the lap. Fluctuations in the lap interval increase the size and number of the triangular voids, and therefore it is desirable to suppress the variation as much as possible.

An object of the present invention is to ensure a constant tape width and to wind a tape around a connection portion of a power cable so as to form a highly reliable connection portion having a better appearance and a small number of inclusion voids. To provide an automatic tape winding method and apparatus therefor.

[0012]

According to a first aspect of the present invention, there is provided an automatic tape winding method comprising a rotating body rotating concentrically with respect to a connection portion of a power cable. While feeding the tape from the tape feeding section and rotating the rotating body while maintaining a constant number of revolutions, after passing the fed tape through a guide roller provided on the rotating body, while adjusting the tension to a constant tension with a tension roller. In the automatic tape winding method for winding the tape around the connection portion of the power cable, the tape width is detected by a tape width detection sensor provided near a running path of the tape passing through the tension roller, and the detected actual tape width is used. Is compared with a preset tape width, and the rotational resistance of the tension roller is controlled based on the output signal of the comparison result. It is characterized in always be wound at a constant tape width of the tape to the connecting portion of the power cable.

According to a second aspect of the present invention, there is provided an automatic tape winding device, wherein a support portion for supporting a connection portion of a power cable is provided at an upper portion of a support provided on both sides of a base.
A movable member that can reciprocate is provided between the columns, a hollow cylindrical member is provided on a concentric circle with the connection portion of the power cable on the movable member, and a rotating body that rotates around the hollow cylindrical member is provided. In an automatic tape winding device in which a tension roller is provided on an outer peripheral portion of the rotating body via a tape feeding portion, a plurality of guide rollers, and a bracket, a tape width is detected by a bracket near a tape running path passing through the tension roller. A sensor is provided, and a brake for comparing the actual tape width detected by the tape width detection sensor with a preset tape width and controlling the rotational resistance of the tension roller based on an output signal of the comparison result is provided. It is characterized by being provided on a tension roller.

Therefore, the columns are erected on both the left and right sides of the base, and the connection portion of the power cable is supported by the supporting portions provided above the erected columns. In this state, by rotating the rotating body with respect to the hollow cylindrical member provided on the moving member while maintaining a constant number of rotations, the tape is sent out from the tape feeding portion provided on the rotating body, and a plurality of guide rollers are provided. And is wound around the connection portion of the power cable while maintaining a constant tension by a tension roller. At this time, the moving member always moves in the longitudinal direction of the connection portion of the power cable at a constant pitch, and the tape is wound around the connection portion of the power cable in a desired shape while reciprocating in a necessary range.

While the tape is being wound around the connection portion of the power cable, the actual tape width is always detected by a tape width detection sensor provided via a bracket near the tape running path passing through the tension roller. The detected actual tape width is compared with a preset tape width, and a brake provided on the tension roller is controlled based on an output signal of the comparison result to control the rotational resistance of the tension roller. Thus, the tape is wound so as to ensure that the actual tape width always falls within the set tape width.

As a result, a highly reliable connection portion having more excellent appearance and less inclusion voids is formed.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings.

Referring to FIGS. 1 and 2, the automatic tape winding device 1 has, for example, an upright base 3 and supports 5L, 5R on both left and right sides of the base 3. I have. Support portions 7L and 7R for supporting the connection portion S of the power cable are provided above the columns 5L and 5R.

Guide rails 9F and 9R extending in the left-right direction (left-right direction in FIG. 2) are laid on front and rear portions (left-right portion in FIG. 1) of the base 3. A plurality of wheels 11 ride on the guide rails 9F and 9R, and the plurality of wheels 11 are supported on the front, rear, left and right portions of the moving member 13. A moving motor 15 is provided on the moving member 13 via a motor base 17.

An output shaft 19 of the moving motor 15 is connected to rotate a nut member 21 through a plurality of drive transmission members such as gears. This nut member 21
A ball screw 23 extending in the left-right direction is screwed into the ball screw 23. The left and right ends of the ball screw 23 are supported by the columns 5L and 5R. The nut member 21 is built in a support member 25 erected on the moving member 13.

With the above configuration, when the moving motor 15 is driven, the nut member 21 is rotated via the output shaft 19 and the drive transmitting member. Since the nut member 21 is screwed to the ball screw 23, the moving member 13 is moved in one direction in the left-right direction (the left-right direction in FIG. 2) via the support member 25. In addition, the moving motor 1
By reversing 5, the moving member 13 is moved in the other direction in the left-right direction, so that the moving member 13 reciprocates within a necessary range.

A support plate 27 extending vertically is integrated with the support member 25. The support plate 27 has a hollow cylindrical member 2 as shown in FIG.
9 is fixed. A plurality of rotating rollers 31 are rolled on the outer peripheral portion of the hollow cylindrical member 29 at appropriate intervals, and each of the rotating rollers 31 is rotatably supported by a rotating body 35 having a gear 33 on the outer peripheral portion. ing.

Another gear 37 is screwed to the gear 33, and this gear 37 is connected to an output shaft 41 of a rotation motor 39 via another gear. The rotation motor 39 is provided on the moving member 13 via a motor base 43.

With the above configuration, when the rotation motor 39 is driven, the gear 33 is smoothly guided by the plurality of rotation rollers 31 to the hollow cylindrical portion 29 via the output shaft 41, other gears, and the gear 37. Because it is rotated, the rotating body 35
Are rotated in the same direction as the gear 33.

1 and 2, the shafts 45 and 47 extending leftward in FIG.
The shafts 45 and 47 are connected by a connection frame 49. In FIG. 1 and FIG. 2, a tape reel 53 as a feeding portion is supported by a shaft 51 at a substantially central portion of the connecting frame 49. That is,
Connection S between the center of the tape reel 53 and the power cable
Is almost in agreement with the center. Therefore, the tape reel 53 is concentric with the connection portion S of the power cable. The tape T is wound on the tape reel 53 in advance with a constant winding amount.

A guide roller 57 is provided on the shaft 45 via a bracket 55. The rotating body 3
5, a support bracket 61 is pivotally supported by a hinge pin 59 at the lower portion. Guide rollers 63 and 65 are provided at both ends of the support bracket 61 to guide the running of the tape T sent out from the tape reel 53. Have been.

A bracket 67 is fixed to the lower left portion of the rotating body 35 in FIG. 1 with a plurality of bolts. The bracket 67 has a tension roller 69 and a tension roller, as shown in FIG. Guide rollers 71 and 73 are provided before and after 69.

A brake 75 is provided on the shaft of the tension roller 69. The guide roller 7
In FIG. 3 of FIG. 3, a transmission type optical sensor 7 as an example of a tape width detection sensor
7 are provided. Also, FIG.
In the upper part of the rotating body 35, a take-up reel 79 for discarded paper that is peeled off from the tape T is provided.
Further, in FIG. 2, for example, a control device 81 for controlling the automatic tape winding device 1 is attached to a side surface of the support 5R.

With the above configuration, the leading end of the tape T wound on the tape reel 53 is taken out, and the guide roller 5
7, 63, 65, 71, the tension roller 69, and the guide roller 73, peel off the waste paper P attached to the back surface of the tape T, fix the leading end of the tape T to the connection portion S of the power cable, and remove the waste paper P. It is fixed to the core rod of the take-up reel 9 for waste paper.

In this state, the rotating body 35 is rotated, for example, clockwise as shown by arrows in FIGS.
Tape reel 53 and guide roller 5
7, 65, 71, 73, the tension roller 69, the waste paper take-up reel 79, etc. also rotate together.
The tape T is sent out from the tape reel 53 and wound around the connection portion S of the power cable, and is also wound around the core rod of the waste paper take-up reel 79 on the waste paper P.

At this time, the moving member 13 also always moves in the left-right direction in FIG. For example, it is wound in a shape as shown in FIG.

When the tape T is wound around the connection portion S of the power cable, the tension of the tape T is maintained and adjusted by the tension roller 69, and the tape T that has passed through the guide roller 73 always transmits light. Sensor 77
Detects the tape width W of the tape T. For example, as shown in FIG. 4, the transmission type optical sensor 77 includes a light emitting unit 77A.
And a light receiving portion 77B. When the light is emitted from the light emitting portion 77A and the light is received by the light receiving portion 77B, the tape T is positioned between the light emitting portion 77A and the light receiving portion 77B with respect to the paper surface in FIG. 4, the tape width W of the tape T is always detected by detecting the optical elements at the upper and lower positions in FIG. 4 where the light is not received by the light receiving portion 77B. By controlling the brake 75 provided on the shaft portion of the tension roller 69 based on the detected actual tape width W, the actual tape width W is set to a preset tape width W _0.
It is intended to fit within.

The tape width detection sensor is not limited to the transmission type optical sensor 79, but may be a reflection type optical sensor or another sensor.

As shown in FIG. 5, for example, the control device 81 includes a CPU 83 to which an input device 85 such as a keyboard and an output device 87 such as a display device such as a CRT are connected. . Also, CP
U83 program memory 89 allowed to store a program for winding the tape T to the connection portions S of the power cable to the desired shape, set tape width and to be brought stores setting tape width W ₀ which is input in advance from an input device 85 The memory 91 and a comparison judging means 93 for calculating and comparing the tape width W actually detected with the set tape width W ₀ stored in the set tape width / memory 91 are connected.

The CPU 83 includes the moving motor 1
5, the rotation motor 39 and the transmission type optical sensor 77 are connected, and the brake 75 provided on the tension roller 69 is connected.

With the above configuration, the program memory 89
By operating the program stored in the control unit to control the moving motor 15 and the rotating motor 39,
A tape T is wound around the connection S of the power cable in a desired shape. When the tape T is wound around the connection portion S, the tape T is always
Is detected and taken into the comparison judging means 93. Since the set tape width W ₀ stored in the set tape width / memory 91 has already been taken into the comparison judging means 93, the comparison judging means 93 makes a comparison judgment between the actual tape width W and the set tape width W _0. Is done.

As a result of this comparison, if the actual tape width W is smaller than the set tape width W ₀ (W <W ₀ ), the brake 75 of the tension roller 69 is controlled to reduce the tension to reduce the actual tape width W. There is to be the setting tape width W _0. If the actual tape width W is larger than the set tape width W ₀ (W> W ₀ ), the brake 75 of the tension roller 69 is controlled to increase the tension so that the actual tape width becomes the set tape width W _0. To do.

Therefore, the fluctuation of the tape width W immediately before winding the tape T around the connection portion S of the power cable can be suppressed to a predetermined set tape width, for example, a fluctuation of about ± 5% or less. Thus, by keeping the fluctuation of the tape width W as small as possible, the step difference at the time of 1/2 wrap winding can be suppressed to the minimum necessary, and furthermore, the external appearance is more excellent, and the reliability with less inclusion voids is obtained. High power cables can be formed.

(Embodiment 1) Using the automatic tape winding device 1 shown in FIGS. 1 and 2 and operating the transmission type optical sensor 77, the tension roller 69 is controlled to keep the tape width within ± 3%. Control the brake 75 of TJ, T
MJ and RMJ tapes were wound. The same automatic tape winding device 1 was used as a comparative example, but the tape was wound in the same manner without operating the transmission sensor 77 and without controlling the tension.

Table 1 shows the results of measuring the variation of the tape width in the tape winding step for the above two examples. Table 2 shows the result of observing the appearance at the end of winding, and Table 3 shows the measurement result of the air content of the reinforcing insulating layer in order to use it as an index of the void occupancy.

[0041]

[Table 1]

[Table 2]

[Table 3] As a result, the variation in the tape width was suppressed to within ± 5% in the example, whereas the variation in the tape width was large in the comparative example at + 10% and −11%. The appearance of the example was better than that of the comparative example, and the air content was 0.7 to 0.8, which was better when the comparative example was set to 1.

(Embodiment 2) In FIG. 1 and FIG. 2, the transmission type sensor was used as the tape width sensor. When the reflection light sensor was attached and the tape width was detected, the difference in the tape width variation between the two was determined. I was not able to admit.

It should be noted that the present invention is not limited to the above-described embodiment of the invention, but can be embodied in other modes by making appropriate changes.

[0044]

As will be understood from the above description of the embodiments of the invention, according to the first and second aspects of the present invention, the columns are erected on the left and right sides of the base, and the erected columns are provided. The connection portion of the power cable is supported by the supporting portion provided on the upper portion of the support. In this state, by rotating the rotating body with respect to the hollow cylindrical member provided on the moving member while maintaining a constant number of rotations, the tape is sent out from the tape feeding portion provided on the rotating body, and a plurality of guide rollers are provided. And is wound around the connection portion of the power cable while maintaining a constant tension by a tension roller. At this time, the moving member always moves in the longitudinal direction of the connection portion of the power cable at a constant pitch, and the tape is wound around the connection portion of the power cable in a desired shape while reciprocating in a necessary range.

When the tape is wound around the connection portion of the power cable, the actual tape width is always detected by a tape width detection sensor provided via a bracket near the tape running path that has passed through the tension roller. The detected actual tape width is compared with a preset tape width, and a brake provided on the tension roller is controlled based on an output signal of the comparison result to control the rotational resistance of the tension roller. Thus, it is possible to ensure that the actual tape width immediately before winding on the connection portion always falls within the set tape width and wind the tape.

Thus, it is possible to form a highly reliable connection part having a better appearance and less inclusion voids.

[Brief description of the drawings]

FIG. 1 shows a main part of the present invention;
It is an enlarged arrow view along the line.

FIG. 2 is a front view of the automatic tape winding device of the present invention.

FIG. 3 is an enlarged view of a part viewed from an arrow III in FIG. 1;

FIG. 4 is an explanatory diagram for detecting a tape width by a transmission sensor.

FIG. 5 is a configuration block diagram of a control device.

FIG. 6 is a front sectional view of a connection portion of a power cable.

[Explanation of symbols]

 Reference Signs List 1 automatic tape winding device 3 base 5L, 5R support 7L, 7R support portion 13 moving member 15 moving motor 29 hollow cylindrical member 33 gear 35 rotating body 39 rotation motor 53 tape reel (feeding portion) 69 tension roller 75 brake 77 transmission Type sensor (tape width detection sensor) 79 Take-up reel for discarded paper 81 Control device 91 Set tape width / memory 93 Comparison / judgment means S Power cable connection T Tape W Tape width

Claims (2)

[Claims] 1. A tape is fed from a tape feeding portion provided on a rotating body rotating on a concentric circle with respect to a connection portion of a power cable, and the rotating body is rotated while maintaining a constant rotation speed, After passing the fed tape through a guide roller provided on the rotating body, the tape passed through the tension roller in an automatic tape winding method in which the tape was wound around a connection portion of the power cable while being adjusted to a constant tension by a tension roller. The tape width is detected by a tape width detection sensor provided near the tape traveling path, and the detected actual tape width is compared with a preset tape width, and the tension is determined based on an output signal of the comparison result. Automatic tape characterized by controlling the rotation resistance of the roller and always winding the tape with a constant tape width around the connection part of the power cable. How to roll the soup. 2. A support portion for supporting a connection portion of a power cable is provided on an upper portion of a column erected on both right and left sides of a base, and a reciprocally movable member is provided between the columns, and a movable member is provided on the movable member. A hollow cylindrical member is provided on a concentric circle with the connection portion of the power cable, a rotator rotating around the hollow cylindrical member is provided, and a tape feeding portion, a plurality of guide rollers and a bracket are provided on an outer peripheral portion of the rotator. In an automatic tape winding device provided with a tension roller via a tape width detection sensor, a tape width detection sensor is provided on a bracket near a tape running path passing through the tension roller, and the actual tape width detected by the tape width detection sensor is provided. And a preset tape width, and based on an output signal of the comparison result, a shake for controlling the rotation resistance of the tension roller. An automatic tape winding device comprising a tension roller and a tension roller.