JPH01209683A - Automatic winding machine for insulation tape for power cable connecting section - Google Patents

Abstract

PURPOSE:To make it possible to perform tape winding accurately and easily by turning back and running a movable table based on a signal issued from a turn back point sensor in response to the movable table and shifting the turning back point at every specified stroke. CONSTITUTION:By the running of a movable table 25 along power cables 21, 22, an insulation tape T is reeled out and wound around the connecting section of the power cables 21, 22. When the movable table 25 reaches the location of turning back point sensors 31, 32, the turning back point sensors 31, 32 issue signals, the movable table turns back in the opposite direction, and the direction of progress of the winding is reversed. As the turning back point sensors 31, 32 are shifted according to the output signal and by a turning back point adjustment mechanisms 29, 30, the turning back point of the insulation tape is shifted at every specified stroke, a stress cone is formed, and the filling of a pencilling section is performed. This enables accurate and easy winding of the insulation tape.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a device for wrapping insulating tape at the connections of power cables.

Conventional technology It is well known that tape-wrapped connections are often used in rubber/plastic power cables such as cross-linked polyethylene power cables (CV cables), and the structure of connections using this method is As shown schematically in Figure 6, the conductor 5゜6, which has been exposed by removing the insulation (43, 4) at the end of the power cable 1゜2 in a tapered shape (this is called penciling), is connected to the connecting pipe 7. Connect its conductor 5
．． After wrapping the semiconductive tape 8 around the outer circumferential surfaces of the power cable 1.613 and the connecting pipe 7, an insulating tape 10 is wrapped between each pencil ring part until the outer diameter is approximately equal to the outer diameter of the power cable 1.2. Then, wrap the insulating tape 11 around the outer circumference to the thickness required for insulation,
Stress cones 12 and 13 are formed at both ends to reduce the potential gradient in the direction along the layer and prevent breakage.

The winding of the insulating tape 710 was done manually, but the insulating tape 10.1 to be wrapped with the winding number was
1 is long, the tension must be maintained uniformly, and some manholes have poor working environments, which puts a heavy burden on workers. This problem has become more noticeable as power cables become CV.

Therefore, recently, we have been using a tape winding machine to
A winding of 0.11 is performed. This involves attaching a tape pad to a taping head that rotates on the outer periphery of the power cable, and attaching the taping head to a movable platform that moves back and forth 111 J in the axial direction of the power cable. The winding direction of the insulating tape can be reversed by changing the direction of the insulating tape by operating a switch.

Problems to be Solved by the Invention The stress cones formed at both ends of the connection greatly affect the breaking strength, so they must be accurately finished into a predetermined shape. It is given by sequentially shifting the turning points at which the direction is reversed. However, in conventional tape winding machines, the turning point is set by reversing the running direction of the taping head through a switch operation by the operator, so the turning point is not always at an accurate position, in other words, the resulting stress The shape of the cone could not be precisely finished to a predetermined shape, and as a result, conventionally, a tape winding machine was used, but in the end, insulating tape was wound manually to adjust the shape. It was necessary to do it.

Furthermore, this situation is the same when performing the above-mentioned trough marking, and since the turning point is set by switch operation as described above, the turning point must be set accurately along the slope of the pencil ring part. This is difficult even with considerable skill, and in the past, even if insulating tape was wrapped using a rolling machine, there was a high risk that voids would form at the interface of the pencil ring, creating an electrical weakness. Conventionally, in order to eliminate such inconveniences, prior to mechanically wrapping the valleys, a homogeneous insulating tape was manually wound to fit the shape of the valleys, and the insulating tape was folded back to fill the valleys. Although attempts were made to improve the familiarity of the points, electrical performance was affected by the skill with which the tape was wound, so there was a problem in that the tape winding required considerable skill.

This invention was made against the background of the above-mentioned circumstances, and an object of the present invention is to provide a self-IO attaching machine that can accurately and easily form stress cones and wrap tape including valleys. It is.

Means for Solving the Problems In order to achieve the above object, the invention described in claim 1 includes a movable base that runs along a power cable, and a movable base that is attached to the movable base so as to rotate around the power cable. a taping head provided on the taping head, a holder provided on the taping head to hold the insulating tape, and at least a pair of turntables configured to output a signal in response to the movable base, thereby causing the movable base to reverse and run. a point sensor, a control device that performs arithmetic processing based on the output signal of the turning point sensor, and a turning point adjustment mechanism that moves the turning point sensor in a direction along the power cable under the control of the output signal from the control device. The present invention is characterized by having a configuration including the following.

The invention as set forth in claim 2 also provides a storage means for storing the movement amount of the turning point sensor υ in correspondence with the type of the power cable and the number of reciprocating movements of the movable base; and a drive control means for operating the turning point adjustment mechanism to move the turning point sensor by a displacement of $7J outputted from the means.

Function: Also in the white #J wrapping number type of this invention, the taping head rotates around the power cable, so that the holder rotates around the outer periphery of the insulating tape, and in this state, the movable base rotates along the cable. By running, the insulating tape is unwound from the holder and wound helically around the connection part of the power cable.

When the movable base reaches the turning point sensor, the turning point sensor outputs a signal, and as a result, the movable base reverses and travels in the opposite direction, and the direction in which the insulating tape winds is reversed. . Since the turning point sensors are provided on both sides of the movable table in the direction of movement, the movable table ends up reciprocating within a range with the turning point sensors at both ends. Since the folding point adjustment mechanism (a) is moved by the folding point adjustment mechanism, the folding point of the insulating tape is displaced every predetermined stroke, and as a result,
A stress cone is formed and alignment between the penciling sections is performed.

Further, in the invention described in claim 2, since the movement of the turning point sensor is controlled by the storage means and the drive control means, even if the type of target power cable is different from the conventional one, data that cannot be stored is stored. By simply selecting the necessary data from , you can wrap the necessary insulation tape.

Example Next, embodiments of the invention will be described with reference to the drawings.

FIG. 1 is a schematic diagram showing the overall structure of an embodiment of the present invention, in which clamps 23.23 and 23.22, which hold the power cables 21 and 22 to be connected at both ends of the machine base 20, butt against each other.
24 are provided at the same height, and the machine base 2
0 behind these clamps 23.24 1:! The portion J essentially serves as a guide rail, and the movable base 25 is disposed at that portion. This movable base 25 is screwed onto a feed screw shaft 26 provided between the clamps 23 and 24,
The feed screw shaft 26 is connected to the power cable 21° 22 for reciprocating motion, and the movable base 25
is provided with an annular taping head 27 that rotates around the power cable 21, 22, and an insulating tape holder or tape pad 28 is attached to the taping head 27.
is attached to the front of the Therefore, insulating tape
The taping head 27 rotates and the tape pad 28 revolves around the outer periphery of the power cable 21.22, so that it is fed out and wrapped around the connection part of the power cable 21.22, and the movable base 25 runs in this state. has been done.

A second feed screw shaft 29 is rotatably disposed on the side of the machine base 20, and a servo motor 30 such as a stepping motor is connected to one end of the second feed screw shaft 29. This second feed screw shaft 29 has a right-handed thread at one end and a left-handed thread at the other end with the center as a boundary, and the right-handed threaded portion and the left-handed threaded portion are separated. A non-contact turning point sensor 31, 32 consisting of a proximity switch or the like is screwed into each of the two. Therefore, these sensors 31, 32 can rotate the second feed screw shaft 29 by the servo motor 30. They are configured to move closer to each other or move farther apart. On the other hand, the movable base 2
5 is provided with an iron plate electrode 33 that operates these sensors 31, 32.

The sensors 31 and 32, the servo motor 30, and the movable table 25 are electrically connected to the control device 34.

To further explain the necessary parts of the above configuration, the movable base 25 has four running wheels 35, as shown in FIG. It is arranged to occur by rotating 8 a feed nut (not shown).

That is, the movable base 25 is equipped with a motor 36 having four motors, and a gear 37 connected to its output shaft meshes with a gear τ=39 attached to an intermediate shaft 38. The intermediate shaft 38 is connected to the forward gear 41 through one gear 43 of a forward gear 41 and a rear ρ gear 42 which are selectively connected by an electromagnetic clutch 40, and is connected to the backward gear 42. is connected to via two gears 44 and 45. The output shaft of the electromagnetic clutch 40 is connected via a gear 47 to a gear 46 that rotates a feed nut. Therefore, the rotation of the motor 36 is transmitted to the feed nut via these gear trains, and the direction of rotation is switched between forward and reverse by an electromagnetic clutch 40.

The intermediate shaft 38 is connected via a gear 49 to a ring gear 48 provided on the outer periphery of the taping head 27, so that the motor 36 moves the intermediate shaft 38 and rotates the taping head 27.

FIGS. 3 and 4 are schematic diagrams showing the configuration of the taping head 27. The taping head 27 has a two-part 4M structure in which the power cables 21 and 22 are fed through from the side thereof. The tape pad 28 is rotatably held on the front side by a bracket 50 made of rond or the like. As shown in the figure, the tape pad 28 has its rotation axis connected to the power cables 21, 220.
Radial direction (i.e. radial direction of taping head 27)
A plurality of guide rollers 51 are attached to the bracket 50 for guiding the insulating tape T fed out from the tape pad 28 so as to face in the circumferential direction of the power cables 21 and 22.

In addition, in front of the taping head 27, there is a tension roll 52 and a brake roll 53 that prevent the insulating tape T from loosening.
and the separator S attached to the surface of the insulating tape T.
A winding shaft 54 is provided for winding up.
5 is a perspective view showing the turning point sensors 31 and 32, and these sensors 31 and 32 divide the detection section 55 into two m.
The movable block 56 is attached to the movable block 56 of the structure C, and the movable block 56 is clamped and screwed to the second feed screw shaft 29, and moved to the guide shaft 57 arranged parallel to the second feed screw shaft 29. This is a configuration in which they can be fitted together. That is, the second feed screw shaft 29, the guide shaft 11 foot 57, and the servo motor 30 form four turning point adjustments 114M.

Further, to explain the control unit 34, this control unit 34 basically controls the movement of the movable base 25 to stop and move forward and backward, and controls the servo motor 30. Each time a signal is input from each of the sensors 31 and 32, a signal is sent to the electromagnetic clutch 40 mounted on the movable base 25 to switch and operate the electromagnetic clutch 40, thereby reversing the running direction of the movable base 25. The configuration is δ. The control VT device 34 also has a storage means 58 for storing various data, a drive control means 59, etc. Each sensor 31.32
Drive control means 59 based on the number of reciprocating movements of movable base 25 obtained by counting signals input from
controls the rotation direction and rotation angle of the servo motor 30, and as a result, each sensor 31, 32 is moved to move the movable base 2.
The stress cone is finished into a predetermined shape by sequentially changing the inversion position Ill of No. 5, that is, the folding point, and when the stress cone is in a desired shape, the folding points are brought closer to each other each time one layer is wound.

Next, the operation of the above device will be explained. The winding of the insulating tape T is basically the same as the conventional mechanical winding. When the motor 36 mounted on the movable base 25 is driven, the taping head 27 rotates. The tape pad 28 revolves around the outer periphery of the power cable 21 . 22 , and the movable base 25 is moved around the power cable 21 .
22, so that the insulating tape ■ is wound in a helical manner. Since it is necessary to wrap the insulating tape 2 in multiple layers, the movable base 25 must be reversed, but in the device of the present invention, the sensors 31 and 32 provide the reversal position of the movable base 25.

1. That is, when the movable base 25 moves, for example, to the right in FIG. 1 and the iron plate electrode 33 operates the sensor 32 on the right side in FIG. 1, the electromagnetic clutch 40 switches based on the output signal of the sensor 32. As a result, the movable base 25
starts moving to the left in Figure 1. Then, when the iron plate electrode 33 operates the sensor 31 on the left side of FIG. 1, the electromagnetic clutch 40 switches again based on the output @, and the movable base 25 starts moving rightward in FIG. In this way, when the movable base 25 travels to the position of each sensor 31.32, the traveling direction is reversed, and as a result, each sensor 31.32
By reciprocating between them, the insulating tape T is wound in multiple layers between them. Further, in the above device, if the type of power cable (for example, the outer diameter) is specified, data regarding the power cable 21.22 and the number of times signals from each sensor 31.32 are inputted to the storage means 58. Then, the drive control means 59 rotates the servo motor 30 by a predetermined angle in a predetermined direction. As a result, the second feed screw shaft 29 rotates and the sensors 31 and 32 move toward or away from each other. In other words, the position where the running direction of the movable base 25 is reversed gradually shifts as the insulating tape ■ is wound, and as a result, a stress cone is formed as specified, and the turning point is filled in a valley exactly along the slope of the pencil ring part. will be carried out.

In addition, in the above embodiment, the positions of the sensors 31 and 32 are changed based on the stored data, but the present invention is not limited to the above embodiment, and the position data of the sensors can be changed based on the stored data. A configuration may also be used in which a device is used to control the flow of water each time the insulating tape is wound.

Effect of light As explained above, according to the automatic winding machine of the present invention, the turning point for reversing the winding direction of the insulating tape can be automatically set at a specified position, so that it is possible to automatically set the turning point at a specified position. It is possible to form stress cones accurately without being affected by variations, and to streamline them.As a result, manual finishing is no longer required, which not only improves work efficiency but also reduces the burden of work planning. This can be reduced. In particular, if the configuration is such that the storage means stores various f-times and the sensor position is controlled by performing the @ function based on the data, it is possible to insulate the power cable by simply specifying the target power cable. Since the tape can be wrapped, there is no need for preliminary operations prior to winding the insulating tape, making the work more efficient.

[Brief explanation of the drawing]

￥ S1 is a schematic diagram showing one embodiment of the present invention, FIG. 2 is a plan view of the movable base, FIG. 3 is a front view of the taping head, FIG. 4 is a side view of the same, and FIG. FIG. 6 is a schematic perspective view of the power cable connection. 21.22...Power cable, 25...Movable base,
27... Taping head, 28... Tape pad, 29... Second feed screw shaft, 30... Servo motor, 31. 32... Turning point sensor, 34...
- Control 6p8 position, 58... Storage means, 59... Drive control means, 1゛... Insulating tape.

Claims (2)

[Claims] (1) A movable base that runs along the power cable, a taping head attached to the movable base to rotate around the power cable, a holder provided on the taping head to hold the insulating tape, and the movable base. at least a pair of turning point sensors that output a signal in response to the platform to reverse and run the movable platform, and a control device that performs arithmetic processing based on the output signal of the turning point sensor;
An automatic winding machine for insulating tape for a power cable connection portion, comprising: a turning point adjustment mechanism that moves the turning point sensor in a direction along the power cable under the control of an output signal from the control device. (2) The control device includes a storage means in which the amount of movement of the turning point sensor is stored in correspondence with the type of the power cable and the number of reciprocating movements of the movable base, and a storage means that stores the amount of movement of the turning point sensor in correspondence with the type of the power cable and the number of reciprocations of the movable base, and the amount of movement outputted from the storage means. 2. The automatic winding machine for insulating tape for power cable connections according to claim 1, further comprising a drive control means for operating said turning point adjustment mechanism to move a turning point sensor.