JP2004035211A - Detection method for wire disconnection and wire end, and wire rewinding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a detection method and its device to securely detect a wire disconnection and a wire end in the case that a wire is rewound from a bobbin and delivered to a post-process such as an insulation device. <P>SOLUTION: The device is equipped with the wire 3, a first electrode 11 electrically connected on the downstream side of the wire 3, and a second electrode 12 arranged below the upstream side passage of the wire 3. The disconnection of the wire 3 or the wire end is detected by applying voltage between the two electrodes 11, 12 with an electric power 13 by detecting electric current state between the wires 11, 12 with an ammeter 14 when the wire 3 is rewound from the bobbin 1 with a predetermined tension applied and delivered. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a wire unwinding device for unwinding a wire from a bobbin and sending it out to a subsequent process, and more particularly to a wire unwinding device capable of detecting disconnection of the sent wire and a wire end.
[0002]
[Prior art]
FIG. 7 is a diagram showing an outline of a conventional steel cord-containing rubber sheet manufacturing apparatus, in which a steel cord-containing rubber sheet 8 is provided from a plurality of bobbins 1 mounted on a carriage 2 to steel cords (hereinafter, referred to as wires). 3 are continuously unwound, the plurality of wires 3 are aligned at predetermined intervals by a wire guide 4 and an alignment roll 5 and sent to an insulation device 6 in a subsequent process. After a thin rubber layer is applied to the surface of the wire 3, the wire 3 is unwound by a pull drum 7 as unwinding means and sent out to a winding device (not shown). At this time, in order to smoothly feed the wire 3, a predetermined tension is applied to the wire 3 at least between the bobbin 1 as the unwinding portion and the pull drum 7 as the winding portion.
[0003]
[Problems to be solved by the invention]
By the way, it is essential that the set number of wires 3 is continuously buried in the steel cord-containing rubber sheet 8. Therefore, all the wires 3 to be supplied to at least one of the bobbins 1 are wound up. When the wire 3 is broken or the wire 3 is broken, the production of the rubber sheet 8 needs to be interrupted immediately.
However, in the past, since the detection of the broken wire 3X and the detection of the wire end 3Y (also referred to as the end) of the wire wound on the bobbin 1 were performed by the monitoring of the worker, an immediate response could not be taken. There is a problem that a defective product having a small number of wires is generated.
[0004]
The present invention has been made in view of the conventional problems, and when unwinding a wire from a bobbin and sending it to a post-process such as an insulation device, a method for reliably detecting a wire break or a wire end and a method thereof. It is intended to provide a device.
[0005]
[Means for Solving the Problems]
The invention according to claim 1 of the present invention is a method for detecting a broken wire, and when unwinding a wire continuously from a bobbin while applying a predetermined tension, the wire is electrically connected to the wire downstream of the wire. A first electrode connected to the second electrode is installed, and a second electrode is installed below the upstream passage of the wire to apply a voltage between the two electrodes. The disconnection of the wire is detected. Thereby, when the wire is broken, the wire hangs down and comes into contact with the second electrode, so that a current flows between the two electrodes, so that the current flowing between the two electrodes can be detected, By connecting a resistor between the two electrodes in series with the wire and detecting the voltage at both ends, it is possible to easily detect a break in the wire.
According to a second aspect of the present invention, in the method for detecting a broken wire according to the first aspect, a magnet for adsorbing the wire is arranged near the second electrode, and the wire to be sent is periodically arranged. It is characterized in that it is pressed against the above magnet, so that even if the broken wire does not hang down naturally, such as when the welded part of the wire is caught in the hole of the inserter and damaged. Since the disconnected wire can be attracted to the magnet and brought into contact with the second electrode, it is possible to reliably detect the disconnection of the wire.
[0006]
The invention according to claim 3 is a method for detecting the end of a wire, wherein when a wire is continuously unwound from a bobbin through a wire guide while applying a predetermined tension, the wire is downstream of the wire guide. A first electrode electrically connected to the wire is installed on the side, and a second electrode is installed below the wire passage between the bobbin and the wire guide to apply a voltage between the two electrodes. Then, the terminal of the wire is detected from the state of conduction between the two electrodes. That is, when all the wires of the bobbin are sent out, the wire hangs down immediately before the wire guide, and the hung wire comes into contact with the second electrode, so that the two electrodes are electrically connected. Therefore, it is possible to easily detect the end of the wire from the state of conduction between the two electrodes.
[0007]
According to a fourth aspect of the present invention, there is provided a wire unwinding device that unwinds a wire from a bobbin while applying a predetermined tension and sends out the wire, wherein the first wire is electrically connected to the wire downstream of the wire. An electrode and a second electrode disposed below the upstream passage of the wire, and a voltage is applied between the two electrodes to disconnect the wire from a current-carrying state between the electrodes, or This is to detect the end of the wire.
[0008]
According to a fifth aspect of the present invention, in the wire unwinding device according to the fourth aspect, the second electrode is disposed between the bobbin and the wire guide, and the second electrode is insulated from the wire guide. The end of the wire can be detected with a simple configuration.
According to a sixth aspect of the present invention, in the wire unwinding device according to the fourth aspect, the first electrode is provided downstream of the wire guide, and between the first electrode and the wire guide, A second electrode comprising a wire guide and an insulating roller insulated is installed, and a magnet for adsorbing the wire, which is arranged near the second electrode, and the wire to be sent out are periodically attached to the second electrode. A means for pressing against a magnet is provided, which makes it possible to detect a break in the wire with a simple configuration.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a diagram showing Embodiment 1 of the present invention. In this example, a method of detecting a broken wire in a steel cord-containing rubber sheet manufacturing apparatus will be described.
In the figure, 1 is a bobbin mounted on a bogie 2, 3 is a steel cord (hereinafter, referred to as a wire) sent out from each bobbin 1, and 4 is a sending direction of a plurality of wires 3 unwound from the bobbin 1. 5 is an alignment roll for aligning the plurality of wires 3 at a predetermined interval, and 6 is a rubber coating roll 6b, 6b on the surface of the aligned wires 3 introduced from the inserter 6a. An insulation device 7 for applying a thin rubber layer to form a steel cord-containing rubber sheet 8; a pull drum 7 serving as unwinding means for sending the steel cord-containing rubber sheet 8 to a winding device (not shown); A predetermined unwinding tension is applied to the wire 3 by the pull drum 7 to hold the wire 3 in a stretched state without loosening. To transport.
[0010]
In the present example, the first electrode 11 is installed at a portion of the insulation device 6 located downstream of the wire guide 4, which is connected to the inserter 6 a that contacts the bare wire 3 on which rubber has not yet been applied. A second electrode 12 composed of an electrode roller is disposed below the path of the wire 3 between the first electrode 11 and the wire guide 4, and a first power supply 13 and a second electrode 11 are provided by a power supply 13. A predetermined voltage is applied between the first and second electrodes 11 and 12, and an ammeter 14 for detecting a current flowing between the first and second electrodes 11 and 12 is disposed between the first and second electrodes 11 and 12. The state of conduction between the first and second electrodes 11 and 12 is monitored.
As shown in FIG. 2, the electrode roller serving as the second electrode 12 is a metal sleeve 12a in which an iron shaft 12b is rotatably mounted by a bearing 12k. It is connected to the first electrode 11 via 13 and an ammeter 14. The tip of the shaft 12b is provided with a wire guide 4 and attached below the wire guide 4 of the frame 17 via a bakelite cover 12n which is an insulator.
As shown in FIG. 3, a magnet 15 for adsorbing the wire 3 is arranged near the second electrode 12, and a wire 15 moving between the wire guide 4 and the insulation device 6 is provided. A press roll 16 for pressing the wire 3 against the magnet 15 is disposed above the magnet 15 above the passage, and the press roll 16 is moved up and down by a cylinder 18 at predetermined time intervals. The wire 3 is brought into contact with the second electrode 12 periodically. The position of the second electrode 12 may be on the upstream side of the magnet 15 or on the downstream side. In addition, it may be provided on the upstream side and the downstream side.
[0011]
Next, a disconnection detection method according to the present invention will be described.
In a normal state in which the wire 3 is continuously flowing, the current flows through the ammeter 14 because the space between the first and second electrodes 11 and 12 is open. When the wire 3 is brought into contact with the magnet 15 by periodically raising and lowering the press roll 16 by the cylinder 18, the unwinding tension acts on the wire 3. Only when the wire 3 contacts the magnet 15, the wire 3 contacts the second electrode 12, but since the wire 3 separates from the magnet 15 and also from the second electrode 12, the ammeter 14 temporarily Only the current flows, it does not flow continuously.
On the other hand, when the wire 3 is broken, since the unwinding tension is not applied to the broken wire 3X, the wire 3X that hangs down due to the break is attracted to the magnet 15, so that the wire 3X is disconnected. The second electrode 12 remains in contact, and a continuous current flows through the ammeter 14.
Therefore, by detecting such an energized state, the disconnected state of the wire 3 can be easily detected. Since the broken wire 3X usually hangs naturally, an auxiliary mechanism for forcibly bringing the broken wire 3X into contact with the second electrode 12 comprising the magnet 15, the presser roll 16, the cylinder 18, and the like as described above. The wire 3 can be detected without a wire. However, when the wire 3 has a weld or the like and is caught in a hole of the inserter 6a and is broken, the wire from the bobbin 1 to the inserter 6a is disconnected. Since the wire 3X may come to a standstill while maintaining the tension, it is preferable to provide the auxiliary mechanism as described above.
[0012]
Embodiment 2 FIG.
In Embodiment 1 described above, a method of detecting a wire break in a steel cord-containing rubber sheet manufacturing apparatus has been described. However, as shown in FIG. The first electrode 11 is installed at a portion conducting to the inserter 6a in contact with the wire 3, and the second electrode 19 is arranged between the bobbin 1 and the wire guide 4, so that the wire end 3Y of the wire 3 is Can be detected. As shown in FIGS. 5 and 6A and 6B, the second electrode 19 is formed by fixing an iron bar 19a to a conductive plate 19b and installing the wire guide 4 on the wire 17 of the frame 17. Attached below the guide 4 via a bakelite plate 19c, which is an insulator, between the first and second electrodes 11 and 19, a power supply 13 and an ammeter as in the first embodiment. The current meter 14 detects the state of conduction between the first and second electrodes 11 and 19 and detects the wire end 3Y of the wire 3.
In a normal state in which the wire 3 is continuously flowing, the current flows through the ammeter 14 because the space between the first and second electrodes 11 and 19 is open.
On the other hand, when the wire end 3Y of the wire 3 leaves the bobbin 1, the unwinding tension is not acting on the wire end 3Y, so that the wire end 3Y hangs down and comes into contact with the iron bar 19a of the second electrode 19. As a result, a current flows between the first and second electrodes 11 and 19 and a continuous current flows through the ammeter 14. Therefore, by detecting such an energized state, the wire end 3Y of the wire 3 can be detected.
[0013]
In the first and second embodiments, the current flowing between the two electrodes 11 and 12 (electrodes 11 and 19) is detected to detect a wire break or a wire end. The resistance between the two electrodes 11 and 12 (electrodes 11 and 19) is determined by another method such as connecting a resistor in series with the wire 3 between the electrodes 11 and 12 (electrodes 11 and 19) and detecting the voltage at both ends. The energized state may be detected.
[0014]
【The invention's effect】
As described above, according to the present invention, when unwinding and sending out a wire while applying a predetermined tension from a bobbin, the first electrode electrically connected to the wire on the downstream side of the wire A second electrode disposed below the upstream passage of the wire, and applying a voltage between the two electrodes to disconnect the wire or to terminate the wire from a current-carrying state between the electrodes. Is detected, the disconnection of the wire or the end of the wire can be automatically detected with a simple configuration.
[Brief description of the drawings]
FIG. 1 is a view schematically showing an apparatus for producing a rubber sheet containing a steel cord according to the present invention.
FIG. 2 is a diagram showing a method for detecting a broken wire according to the first embodiment.
FIG. 3 is a diagram showing a configuration of a second electrode according to the first embodiment.
FIG. 4 is a diagram showing a method of detecting a wire end according to the second embodiment.
FIG. 5 is a diagram illustrating details of a method of detecting a wire end;
FIG. 6 is a diagram showing a configuration of a second electrode according to the second embodiment.
FIG. 7 is a diagram showing an outline of a conventional steel cord-containing rubber sheet manufacturing apparatus.
[Explanation of symbols]
Reference Signs List 1 bobbin, 2 bogies, 3 wires, 4 wire guides, 5 alignment rolls, 6 insulation device, 6a inserter, 6b rubber coating roll, 8 steel cord-containing rubber sheet, 11 first electrode,
12, 19 second electrode, 13 power supply, 14 ammeter, 15 magnet,
16 presser rolls, 17 frames, 18 cylinders.

Claims (6)

When unwinding the wire continuously from the bobbin while applying a predetermined tension, the first electrode electrically connected to the wire is installed downstream of the wire, and the first electrode is placed below the upstream passage of the wire. A method for detecting wire breakage, comprising: disposing a second electrode, applying a voltage between the two electrodes, and detecting a disconnection of the wire based on an energized state between the two electrodes. 2. A wire breakage according to claim 1, wherein a magnet for adsorbing the wire is arranged near the second electrode, and the wire to be sent is periodically pressed against the magnet. Detection method. When a wire is continuously unwound from a bobbin while applying a predetermined tension through a wire guide, a first electrode electrically connected to the wire is installed downstream of the wire guide, A second electrode is provided below the wire passage between the wire guide and the wire guide, a voltage is applied between the two electrodes, and the end of the wire is detected from the state of conduction between the two electrodes. A method for detecting the end of a wire, characterized in that: In a wire unwinding device for unwinding a wire from a bobbin while applying a predetermined tension, the first electrode electrically connected to the wire downstream of the wire, and a wire passage upstream of the wire. And a means for applying a voltage between the two electrodes to detect a disconnection of the wire or a wire end from a current-carrying state between the electrodes. A wire unwinding device characterized by the above-mentioned. The wire winding according to claim 4, wherein the second electrode is disposed between the bobbin and the wire guide, and the second electrode is formed of an iron plate or an iron bar insulated from the wire guide. Output device. A first electrode is installed on the downstream side of the wire guide, and a second electrode composed of an insulating roller insulated from the wire guide is installed between the first electrode and the wire guide. 5. The wire unwinding device according to claim 4, further comprising: a magnet arranged near the electrode for attracting the wire, and a unit for periodically pressing the sent wire against the magnet. .

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