JPH0641885A - Strand cable machine and method for detecting broken wire - Google Patents

Abstract

PURPOSE:To uniform the diameter of the stranded cable, shorten a setup time, and reduce the production cost of a stranded cable machine by detecting the breakage and looseness of a core wire with a simple structure. CONSTITUTION:In a wire-stranding process for stranding plural core wires by arranging plural supply bobbins 2 wound with core wires 4 on the circumferential direction of a rotor 1, applying back tensions to the respective core wires pulled out from the supply bobbins, and simultaneously rotating the rotor to collect the core wires at a stranding opening 11, the position of the rotation direction of the rotor is detected with the first sensor 16 from the outside of the rotor 1 in a contactless state. The clearances of the core wires are simultaneously detected with the second sensor 17 from the outsides of the core wires ranging from the supply bobbins to the stranding opening in a contactless state. When the number of clearances having values below a prescribed value within the prescribed rotation angle of the rotor is compared with a preliminarily determined number, and when the values are inharmonious, it is judged that the core wire is broken or loosed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a twisting machine for twisting wire materials such as cables to produce a twisted wire, and a method for detecting a wire breakage or looseness of a core wire in such a twisting machine. The present invention relates to a twisting machine and a method of detecting a breakage, which can prevent the generation of defective products by stopping the twisting machine or calling attention when a break or looseness occurs in the core wire in the twisting process. .

[0002]

2. Description of the Related Art A conventional twisting machine is generally constructed as shown in FIG. That is, the rotating body 30 rotating with respect to the base and a take-up machine (not shown) for pulling the twisted wire 31 twisted by the rotating body 30 are provided. A plurality of supply bobbins (not shown) around which a core wire 32 to be twisted is wound are arranged in the circumferential direction of the rotating body 30, and the rotating body 30 and the supply bobbin are integrated. Rotate. Further, the rotating body 30 is provided with an eye plate 33 having a plurality of through holes (or notches) in the circumferential direction, and when the rotating body 30 rotates, the eye plate 33 also rotates. There is.

When the twisted wire 31 such as a cable is manufactured using such a twisting machine, the core wires 32 are respectively drawn from the supply bobbins arranged in the circumferential direction of the rotary body 30 and rotated together with the rotary body 30. The respective core wires 32 are inserted into the through holes of the eye plate 33, and these core wires 32 are gathered in the twisted opening 34 which is fixed in position. Since a take-up device for pulling the twisted cable 31 is provided on the downstream side of the twisting port 34, the twisting device 31 is rotated while the twisting device 31 is pulled by this take-up device, whereby the twisting from the twisting port 34 is twisted. The wire 31 will be manufactured.

[0004]

By the way, when manufacturing a stranded wire such as a cable, it is necessary to make the tension of each core wire constituting the stranded wire constant and to make the diameter of the stranded wire uniform.
Therefore, in the twisting machine, the back tension is applied to the core wire pulled out from the supply bobbin. Such back tension is, for example, Japanese Patent Publication Sho 5
As disclosed in Japanese Unexamined Patent Publication No. 1-17,618, it is operated by a guide hole or the like.

If even one of the plurality of core wires is slack, laughter occurs in the twisted wire and the wire diameter of the twisted wire becomes uneven, so that the twisting machine can be immediately used. Need to stop. The same applies when the core wire is broken. In the conventional twisting machine, as a method for detecting disconnection or looseness of the core wire 32, as shown in FIG. 5, a metal rod 36 having a ring 35 attached to the tip thereof is attached to the rotating body 30 and pulled out from the supply bobbin. When the core wire 32 is inserted into the ring 35 and the core wire is broken,
The support of the ring 35 by the cord is removed, so that
The metal rod 36 was configured to be detected by the metal detection sensor 37.

However, when the core wire is broken,
The metal rod is likely to jump outward due to centrifugal force and may not be detected by the metal detection sensor, so that the detection operation is unstable and there is a problem in reliability. Moreover, when the core wire was slack, this could not be detected. As a result, there is a problem that the back tension of each core wire becomes non-uniform and the wire diameter of the stranded wire varies. Further, when starting the twisting machine, it is necessary to insert each core wire into each ring, and such work is generally performed manually, resulting in an increase in work time. Moreover, as shown in FIG. 5, since the metal detection sensor is mounted inside the rotating body, a slip ring or the like for passing the signal is required to output the detection signal to the outside of the rotating body. However, there is a problem that the manufacturing cost of the twisting machine increases.

The present invention has been made in view of the above-mentioned problems of the prior art. By detecting the disconnection and looseness of the core wire with a simple structure, the wire diameter of the stranded wire is made uniform and The purpose is to reduce the setup time and the manufacturing cost of the twisting machine.

[0008]

In order to achieve the above object, the twisting machine of the present invention has a plurality of bobbins wound around a core wire arranged in the circumferential direction of a rotating body and pulled out from the bobbin. In the twisting machine for twisting the plurality of core wires by rotating the rotary body while applying back tension to each core wire and gathering the core wires into a twisting port, the position is set with respect to the rotary body. The first sensor is fixedly provided and detects the position of the rotating body in the rotation direction, and the first sensor is fixedly provided with respect to the rotating body from the bobbin to the twisting port, and the distance from the core wire is set. A second sensor that detects and outputs a signal when approaching a predetermined distance or more;
The information from the two sensors is input, the detection signal of the core wire by the second sensor is counted, and the core wire is detected within a predetermined rotation angle of the rotating body detected by the first sensor. It is characterized by having a control unit for comparing whether or not a signal exists by a predetermined value.

Further, a plurality of bobbins around which the core wire is wound are arranged in the circumferential direction of the rotating body, and the rotating body is rotated while applying back tension to each core wire drawn out from the bobbin. In the twisting step of twisting the plurality of core wires by gathering the core wires into a twisted hole, while detecting the position in the rotation direction of the rotary body in a non-contact state from the outside of the rotary body, from the bobbin The separation distance from the core wire is detected in a non-contact state from the outside of the core wire reaching the twisted hole, and within a predetermined rotation angle of the rotating body, the separation distance is predetermined to be a predetermined value or less. The above object can also be achieved by a method of detecting a disconnection, which is characterized by comparing the number of times with each other and determining that the core wire is disconnected or loose in the case of disagreement.

[0010]

[Operation] When twisting a core wire using the twisting machine of the present invention,
Arrange a plurality of bobbins around which the core wire is wound in the circumferential direction of the rotating body, rotate the rotating body while applying back tension to each core wire drawn from this bobbin, and collect each core wire at the twisting port. It is carried out by At this time,
The first sensor provided for fixing the position with respect to the rotating body detects the position of the rotating body in the rotation direction, and is provided for fixing the position with respect to the rotating body between the bobbin and the twisting port. While the second sensor detects the distance between the second sensor and the core wire, the signals of these two sensors are taken into the control unit.

The second sensor outputs a signal when the second sensor is close to a predetermined distance or more. That is, although the core wire is sequentially positioned on the second sensor as the rotating body rotates, when the back tension is normally acting, the core wire is in tension, so that the second sensor and the core wire are in contact with each other. The distance is the shortest. On the other hand, when the core wire is broken or the core wire is slack, the distance between the second sensor and the core wire becomes long, and at this time, the signal from the second sensor is transmitted. Is not output.

The control section inputs information from the two sensors and counts the detection signal of the core wire (core wire on which the back tension is normally acting) by the second sensor. Then, it is compared whether or not the normal core wire detection signal exists by a predetermined value within the predetermined rotation angle of the rotating body detected by the first sensor. If the normal detection signal of the core wire is small, the back tension is reduced by a small number, or the core wire is broken.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a block diagram showing a twisting machine according to an embodiment of the present invention, FIG. 2 is a flow chart showing a processing procedure of a control unit according to the embodiment, and FIG. 3 is a front view showing an eye plate according to the embodiment. FIG. 4 is a diagram showing signals detected by the first sensor and the second sensor according to the embodiment.

The twisting machine of this embodiment has a cage (hereinafter also referred to as a rotating body) 1 rotated by a drive motor (not shown), and a core wire is wound around the cage 1 in the circumferential direction. The rotated supply bobbin 2 is attached while being supported by the stay 3. The supply bobbins 2 are provided in the number corresponding to the number of the core wires 4 to be twisted, and are slidable in the pull-out direction of the core wires 4 with respect to the stay 3. Also, the brake 5 on the supply bobbin 2
The electric current supplied from the outside is guided to the brake 5 via the slip rings 6 and 7, whereby the supply bobbin 2 gives a constant back tension to the core wire 4.

Through holes for inserting the core wire 4 are formed in the guide plates 8 and 9 of the cage 1 so as to correspond to the mounting positions of the supply bobbin 2, so that the supply bobbin 2 can be removed from the supply bobbin 2 in the setup stage. The core wire 4 is pulled out, and each core wire 4 is passed through the corresponding through hole. At the right end of the cage 1, there is provided an eye plate 10 having a reduced core wire feeding diameter, and the eye plate 10 also rotates together with the cage 1. Further, similar to the guide plates 8 and 9 described above, the eye plate 10 has through holes 15 (see FIG. 3) for inserting the core wires 4 corresponding to the mounting positions of the supply bobbins 2. Has been formed. Then, in the setup stage, the core wires 4 drawn out from the supply bobbin 2 are passed through the through holes corresponding to the guide plates 8 and 9, respectively, and then inserted through the through holes 15 of the eye plate 10.

In the vicinity of such a cage 1, an eye plate 10 is provided.
Is provided with a twisting port 11 for gathering the individual core wires 4 from 1 to 4 into a twisted wire, and a take-up machine 13 for pulling the twisted wire 12 is provided on the downstream side of the twisting wire 11. ing.

In particular, the twisting machine of the present embodiment is constructed so as to immediately detect the occurrence of disconnection and looseness of each core wire 4 and immediately stop the twisting machine. Specifically, as shown in FIG. 3, a reflector 14 is attached to one point on the outer periphery of the eye plate 10,
A reflection type photoelectric switch (hereinafter, also referred to as a first sensor) is provided outside the rotating body 1 at a position corresponding to the eye plate 10.
16 are provided.

The light emitted from the reflection type photoelectric switch 16 is not reflected by the portion to which the reflection plate 14 is not attached when the rotator 1 rotates and the eye plate 10 rotates accordingly. When the plate 14 rotates to the installation position of the photoelectric switch 16, the light from the photoelectric switch 16 is reflected by the reflection plate 14, and the reflected light is input to the photoelectric switch 16. Therefore, by detecting the output signal of the photoelectric switch 16, the current rotational position of the rotating body 1 can be known.

However, in this embodiment, since the reflector 14 is attached only to one point of the eye plate 10, accurate calculation of the rotating body 1 is performed unless calculation is performed while inputting the rotation speed of the rotating body 1. The rotational position is unknown. However, as will be described later, in the present embodiment, the number of the core wires 4 passing through the second sensor 16 is detected while the rotating body 1 makes one revolution, and this is the set core wire 4 Since it is configured to determine whether or not the number of rotations is the same, it is only necessary to know whether or not the rotating body 1 has made one rotation. Therefore, in the case of the present embodiment, the reflecting plate 14 need only be attached to one point of the eye plate 10.

The present invention is not limited to the method of detecting the number of passages of the core wire 4 during one rotation of the rotating body 1, and the passage of the core wire 4 at a predetermined rotation angle of the rotating body 1 is not limited. Similar results can be obtained by detecting the number. For example, if the two reflecting plates 14 are attached to the facing positions on the outer periphery of the side surface of the eye plate 10, half rotation of the rotating body 1 can be detected by the above-described principle. Therefore, it is only necessary to detect the number of the core wires 4 passing through the second sensor 16 while the rotating body 1 makes a half rotation. Furthermore, the reflector 14
Set the number of sticking variously, and the rotating body 1 according to it
The same result can be obtained even if the rotation angle of the core wire 4 is detected and the number of the core wires 4 passing through the second sensor 16 is detected while the rotor 1 is rotated by this rotation angle. .

The first sensor 16 of the present invention is not limited to the reflection type photoelectric sensor described above, and any means capable of knowing the rotation angle of the rotating body 1 may be used. Further, the reflection plate 14 may be attached to any place of the rotating body 1 instead of the eye plate 10.

In the twisting machine of this embodiment, the supply bobbin 2
The first sensor 16 described above between the
A reflection type photoelectric switch 17 (hereinafter, also referred to as a second sensor), which is a second sensor, is provided at a position close to. The photoelectric switch 17 detects the core wire 4 on which a predetermined back tension is applied and outputs an output signal, but when the core wire 4 is broken or loose. , Are set and arranged not to output the detection signal of the core wire 4. That is, when the core wire 4 is broken, the detection light from the photoelectric switch 17 is not reflected, so no detection signal is output, but even if the core wire 4 is loose, the reflected light from the core wire 4 is not reflected. When the strength is equal to or lower than a predetermined value, it is determined that the core wire is slack, and the core wire detection signal is not emitted.

The photoelectric switch 17 which is the second sensor
When the rotating body 1 makes one rotation, the detection signals are output by the number of core wires 4 twisted together, but if there are broken or loose core wires 4, the number of output signals decreases by that number. Will be done. Based on this principle, the number of output signals from the second sensor 17 at this number of rotations is measured while detecting the number of rotations of the rotating body 1 by the photoelectric switch 16 which is the first sensor described above, and this is normal. The control unit 18 determines whether or not the number is a certain number.

The signals from the two photoelectric switches 16 and 17 are amplified by the amplifiers 19 and 20, respectively. Since the amplified signals are hunting,
This is shaped by the waveform shaping amplifiers 21 and 22, respectively, and then input to the control unit 18.

Next, the operation will be described. When the core wires 4 are twisted together using the twisting machine of this embodiment, first, a plurality of supply bobbins 2 around which the core wires 4 are wound are arranged in the circumferential direction of the rotating body 1 and pulled out from the supply bobbin 2. Rotating body 1 while applying back tension to each core wire 4
Is rotated so that each core wire 4 is gathered in the twisted hole 11. Then, the pulling machine 13 pulls the stranded wire 12 with a constant tension to perform the stranded wire. At this time, the position of the eye plate 10 in the rotation direction is detected by the reflection plate 14 by the first sensor 16 fixedly positioned with respect to the rotating body 1, and at the same time from the supply bobbin 2 to the twisting port 11. There is a rotating body 1
With the second sensor 17 fixedly provided with respect to the second sensor 17 while detecting the distance between the second sensor 17 and the core wire 4, the signals of both sensors 16 and 17 are taken into the control unit 18 (step 1).

The second sensor 17 outputs a signal when the second sensor 17 approaches a predetermined distance or more. That is, when the rotating body 1 rotates, the core wire 4 is sequentially positioned on the second sensor 17, but when the back tension is normally acting, the core wire 4 is in tension, so The distance from the core wire 4 is the shortest. On the other hand, when the core wire 4 is broken,
Alternatively, when the core wire 4 is slack, the second sensor 1
Since the distance between the core wire 7 and the core wire 4 becomes long, a signal is not output from the second sensor 17 at this time. This is the control unit 1
In No. 8, the output value of the second sensor 17 is counted only when the distance is closer than a predetermined distance (step 2).

Then, as shown in FIG. 4, in the control section 18, when the output signal from the first sensor 16 is turned on (step 3), the detection signal of the core wire 4 from the second sensor 17 (normal The core wire on which the back tension acts on is counted. Then, it is compared whether or not the normal detection signal of the core wire 4 is present by a predetermined value within one rotation of the rotating body 1 detected by the first sensor 16 (step 4). As shown in FIG. 3, when the number of core wires to be twisted is eight, the rotating body makes one rotation (pulse P
Since the count number of the output signal to be detected by the second sensor 17 during the period (between 1 and P2) is 8, if the eight signals Q1 to Q8 can be counted as shown in FIG.
This means that no wire breakage or slack has occurred.

On the other hand, if the normal detection signal of the core wire 4 is small, the back tension is reduced by a small number or the core wire 4 is broken. Therefore, in this case, a signal indicating an abnormality is output to the outside (step 6), for example, the twisting machine is immediately stopped. If the count value of the detection signal of the normal core wire matches the set value, a signal indicating the normality is output (step 5), and then the control unit 1
When the counter in 8 is reset (step 7) and the twisted wire is to be continued, the process returns to step 1 to repeat the detection of disconnection / loosening in the next rotation (step 8).

The specific configurations of the twisting machine and the method for detecting wire breakage / loosening of the present invention are not limited to the above-described embodiments, but can be modified in various ways.

[0030]

As described above, according to the present invention, the position of the rotating body in the rotating direction is detected from the outside of the rotating body in a non-contact state, and the outside of the core wire from the bobbin to the twisted port is detected. Since the separation distance from the core wire is detected in the state of contact,
The detection signal is transmitted externally. Therefore, it is possible to omit a conventional slip ring or the like for transmitting a detection signal, and it is possible to reduce the manufacturing cost of the twisting machine.

Further, the number of times that the separation distance is less than or equal to a predetermined value within a predetermined rotation angle of the rotating body is compared with a predetermined number of times, and if they do not match, it is determined that the core wire is broken or loose. Therefore, not only the disconnection but also the slack of the core wire can be detected, and thus the wire diameter of the twisted wire can be made uniform. Moreover, since no special setup work is required to detect disconnection or slack, work time can be shortened compared to the conventional case.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a twisting machine according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a processing procedure of a control unit according to the embodiment.

FIG. 3 is a front view showing an eye plate according to the embodiment.

FIG. 4 is a diagram showing signals detected by a first sensor and a second sensor according to the embodiment.

FIG. 5 is a side view showing a conventional twisting machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Cage (rotating body) 2 ... Supply bobbin 4 ... Core wire 10 ... Eye plate 11 ... Stranding hole 12 ... Stranding wire 14 ... Reflector plate 16 ... 1st sensor 17 ... 2nd sensor 18 ... Control part

Claims (2)

[Claims] 1. A plurality of supply bobbins around which a core wire is wound are arranged in a circumferential direction of a rotating body, and the rotating body is rotated while applying back tension to each core wire drawn out from the supply bobbin, A twisting machine for twisting the plurality of core wires by gathering the core wires in a twist opening, which is fixedly provided with respect to the rotating body and detects a position of the rotating body in a rotation direction. And a sensor for fixing the position to the rotating body between the supply bobbin and the twisting port, for detecting a distance from the core wire and outputting a signal when approaching a predetermined distance or more. Of the sensor and the information from the two sensors is input, the detection signal of the core wire by the second sensor is counted, and within a predetermined rotation angle of the rotating body detected by the first sensor. Stranding machine, characterized in that the detection signal of the core wire has a control unit for comparing whether there is only a predetermined value. 2. A plurality of supply bobbins around which a core wire is wound are arranged in a circumferential direction of a rotating body, and the rotating body is rotated while applying a back tension to each core wire drawn out from the supply bobbin, In the twisting step of twisting the plurality of core wires by gathering the core wires into a twisted hole, while detecting the position in the rotation direction of the rotary body in a non-contact state from the outside of the rotary body, The distance from the core wire from the supply bobbin to the twisted end is detected in a non-contact state from the outside, and within a predetermined rotation angle of the rotating body, the distance is equal to or less than a predetermined value in advance. Compare the number of times decided,
A method for detecting a wire breakage, characterized in that the core wire is judged to be broken or loose when they do not match.