KR20010004440A - Method and apparatus for a wire disconnection detector with self-check for steel cord twisters - Google Patents

Abstract

PURPOSE: A self diagnosing method for an earth member of a steel cord braiding machine and a device thereof are provided to prevent a steel cord including a disconnected portion from winding on a winding spool. CONSTITUTION: Three earth members(39-41) are electrically connected with power supply lines(42a,42b,42c). A disconnection detecting unit(43) supplies voltage to the earth members via the power supply lines and outputs the electrical signals inputted from the earth members corresponding to the contact of a wire assembly. By the pulse signals, the disconnection of the wire assembly is decided, and the failure in the disconnection detecting unit is detected by the control signal output from a microprocessor(44). The electrical signals supplied to the earth members are controlled, and a signal according to the failure of a microprocessor is fed back by a relay(45a). The disconnection, the failure of the earth members and the disconnection detecting unit and the winding of a spool are displayed via lamps(46a,46b,46c) of a display unit(46). A control panel(47) is for inputting key data such as braiding machine starting and spool setting.

Description

METHOD AND APPARATUS FOR A WIRE DISCONNECTION DETECTOR WITH SELF-CHECK FOR STEEL CORD TWISTERS

The present invention relates to a stranded wire for steel cord manufacture used as a reinforcement material for rubber products such as tires or conveyor belts of a vehicle. More specifically, the stranded wires supplied from a supply bobbin are installed on a wire moving path until the wires fed from the supply bobbin are stranded together and directed to a winding spool. Steel cord to self-diagnose earth member that detects disconnection of wire, and to stop the operation of twisted pair in case of earth member to prevent winding of steel cord including wire burned on winding spool It relates to a disconnection detector self-diagnosis method and apparatus for a twisted pair.

In general, steel cord is superior to other rubber reinforcing materials in strength, modulus, heat resistance and fatigue resistance among various kinds of reinforcing materials used to reinforce rubber products such as tires and conveyor belts of vehicles. It is known to exhibit the characteristics, and this makes a great contribution to improving wear resistance, durability and steering stability, especially when used in carcass or belt layers as tire reinforcement.

These steel cords are made of carbon steel and have a twisted structure in which a plurality of metal wires with a brass plating layer coated on the surface maintain a constant twist pitch and twist direction to improve adhesion, corrosion resistance and freshness with rubber. have.

On the other hand, steel cords take a variety of structures depending on the number of strands of the strands and the number of strands constituting the twist, and are also manufactured through various types of twisted pairs of ties, among which 2 + 2x0.25mm structure Referring to Figure 1 with respect to the process of manufacturing a steel cord using a twisting machine of the rotary wheel type as follows.

As shown in the drawing, a conventional steel cord twisted pair is a rotary wheel that rotates in a state in which an external supply table 2 on which external wire supply bobbins 1a and 1b are seated and an internal wire supply bobbin 3a and 3b are seated. (4a) is provided with an internal feed table (4), a main motor (5) for applying a rotational driving force to the internal feed table (4), external wire supply bobbin (1a) of the external supply table (2) ( The external element wire 6a, which is released from 1b) and is moved to the internal supply base 4, and the internal element wire 6b drawn out from the internal element supply bobbins 3a and 3b of the internal supply unit 4 are twisted together. The twisted-roll roller 7 which consists of this, the over twister 8 which gives a torsion to the steel cord 6 which exited the twisted-roll roller 7, and the steel cord 6 which passed the over twist 8 Straighteners (9) consisting of a series of roller groups to provide a straightness to the line and to maintain a constant twisted pair pitch, and the steel nose exiting the straighteners (9) The rod 6 is composed of a take-out capstan 12 which is transferred to the take-up machine 10 and wound around the take-up spool 11.

At this time, the external element wires 6a released from the external element wire supply bobbins 1a and 1b of the external supply unit 2 are sequentially guided by the guide rollers 13a to 13e, and thus the internal supply unit 4 Internal element wire supply bobbin in the process of being moved toward the center of the rotary wheel 4a through the guide roller 13f installed in the upper center of the inner feeder 4 again via the rotary wheel 4a after being transported to the lower center. It is associated with the internal element wire 6b drawn out from (3a) and (3b).

In this way, the two strands of the outer wire 6a and the inner wire 6b are connected to each other by the stranded roller 7 provided at the upper center portion of the inner feeder 4 via the guide roller 13g below the rotary wheel 4a. In the process of conveying) the twist is made in a certain twist direction and twist pitch.

Such twisting of the external element wire 6a and the internal element wire 6b is transmitted to the rotary shaft 15 of the internal feed table 4 through the power transmission belt 14 which is the rotation driving force from the main motor 5 to supply the internal supply. Rotation of the base 4 is made, and the inner and outer element wires 6a and 6b are fed together in an internal supply object during the rotation of the inner feeder 4.

On the other hand, the steel cord 6 conveyed through the stranded roller 7 passes through the two guide rollers 16a and 16b, and the overtwist 8 and the straightener 9 driven by the overtwisted drive motor 17. ) Are sequentially directed toward the withdrawal capstan 12.

At this time, the withdrawal capstan 12 is one end is transmitted through the power transmission belt 18, the reducer 19 and another power transmission belt 20 coupled to the rotary shaft 15 of the internal feed table (4). The steel cord 6 is transported by the rotational driving force of the motor 5.

Next, the steel cord 6 exiting the take-out capstan 12 is finally wound on the winding spool 11 which is rotated by the take-up motor 21 of the take-up machine 10, at which time the take-out capstan 12 On the steel cord feed path between the coil and the winding spool 11, a counter pulley 22 equipped with a sensor for detecting the current length of the steel cord being stranded and a tension adjusting roller 23 for adjusting the tension of the steel cord; The twisted pair work is completed by uniformly winding the winding spool 11 through the traverse 24 reciprocating by the width of the winding spool 11. In the figure, reference numeral 25 denotes a traverse motor.

Steel cords manufactured through the twisted-pair process as described above may cause disconnection of some wires due to factors such as tension applied for the movement of supply wires, frictional force applied during the change of the movement path, and defects of the wire itself. .

In this way, some strands of the steel wires that form the steel cords are wound in the winding spool in a state where the strands of the steel cords are formed. In the case of topping work, the disconnection part is detected by the naked eye, and the steel cord manufacturer has to compensate for the damage in accordance with the process.In addition, when the disconnection part is manufactured as a tire product without detecting the disconnection part, the disconnection part is detected. As a result, the reinforcing effect of the tire is reduced, as well as a fatal adverse effect of shortening the life of the tire.

Therefore, in the production of steel cords, an earth member as a disconnection detection device for detecting the occurrence of the disconnection on the movement path of the supply wire and the strand of the stranded wire is installed to operate the twisted pair when the occurrence of the disconnection is detected. The steel cord including the element wire which was stopped and disconnected is prevented from being wound on the spool.

Steel cord disconnection detection device of the conventional twisted pair is installed in the earth member supplying a constant voltage around the supply line union or the movement of the stranded wire by disconnection of some wires are generated to the earth member in the movement process It is structured to detect when it comes in contact.

In the disconnection detection device of a conventional twisted pair, as described above, when the disconnection detection device itself including the earth member performs a normal operation, proper disconnection detection is performed to prevent winding of a steel cord including an element wire in which a disconnection occurs in the winding spool. Although it is effective, if the disconnection detection device itself fails due to a faulty contact between the earth member and the power line connected thereto, an abnormality of the earth member itself, or a disconnection of the power supply line, even if a disconnection occurs in the supply line, it cannot be detected. There is a problem that the winding of the steel cord including the element wire disconnected to the winding spool is inevitable.

In particular, in the conventional disconnection detection device, it is difficult for the earth member to determine whether the worker is operating normally through the naked eye, and in general, whether or not the disconnection detection device is abnormal as one skilled worker is in charge of several decades of twisted pair. There is considerable difficulty in checking.

In the related art, it is periodically checked for abnormality of the disconnection detection device (for example, about 30 days). Since the period is so long, it is difficult to exclude the possibility of mixing failure such as single strand break in the winding spool. .

The present invention is to solve the above problems revealed in the disconnection detection method of the conventional steel cord twisted pair, a plurality of strands of the strands supplied from the strand supply bobbin is twisted with each other to the winding spool to a plurality of strands on the moving path Steel cord including wires disconnected on winding spool is wound up by self-diagnosing fault of disconnection detection device that detects disconnection of element wires by installing two earth members and stopping operation of twisted pair. It is an object of the present invention to provide a method and apparatus for self-diagnosis of the earth member of a steel cord twisted pair.

1 is a schematic structural diagram of a conventional rotary wheel type steel cord twisted pair.

Figure 2 is a schematic structural diagram of an out-in half-charging steel cord twisted pair provided with the apparatus of the present invention.

Figure 3 is a perspective view showing a separate spool assembly mounted on the twisted pair of Figure 2;

Figure 4 is a connection diagram of the peripheral circuit connected with the earth member of the present invention.

Figure 5 is a flow chart showing the operation of the twisted pair according to the method of the present invention.

((Description of the code for the main part of the drawing))

38. Spool, 39. Cylindrical earth member

40. Flat Earth Member 41. Serrated Earth Member

42a, 41b, 41c. Power line

43. Disconnection detector 44. Microprocessor

45. Voltage control means 46. Display

47. Operation Panel

Earth member self-diagnosis method of the steel cord twisted pair for achieving the above object of the present invention, the disconnection detector comprising at least three earth members on the moving path of the element wire is installed so that the element wire is detected whether the disconnection of the element wire In a method in which a steel cord obtained by twisting the liver is wound on a winding spool:

(1) detecting the disconnection of the wire which is moving and the abnormality of the disconnection detector using the earth member;

(2) discontinuing operation of the twisted pair at that time when disconnection is detected from any one earth member as a result of the sensing; And

(3) When the disconnection detector detects an abnormal occurrence, the current spool is wound as it is, and the next spool is prevented from operating the twisted pair regardless of external interruption. .

In addition to the sequential steps described above, the method of the present invention is characterized in that the interrupt is a start signal of the twisted pair by the operator's operation.

And, the disconnection detector self-diagnosis apparatus of the present invention steel cord twisted pair suitable for carrying out the method of the present invention;

(1) at least three earth members provided around the moving path of the element wires so that the ends of the disconnected element wires contact;

(2) a disconnection detection unit for supplying an electrical signal to the earth member and pulsed an electrical signal fed back from the earth member according to whether the element wire is in contact with the moving element;

(3) a microprocessor for judging the disconnection of the wire by the pulse signal from the disconnection detecting unit and generating a control signal for detecting the abnormality of the disconnection detector composed of the earth member and the disconnection detecting unit; And

And (4) voltage interrupting means for intermitting the electrical signal supplied to the earth member according to the control signal supplied from the microprocessor to feed back the signal of the disconnection detector to the microprocessor through the disconnection detecting unit.

In this case, the at least three earth members are configured to be electrically connected in series.

The voltage interrupting means is connected to one of the switching elements switched by the control signal of the microprocessor and the earth member connected in series and bypasses the electrical signals of the earth members to ground by switching of the switching elements. It consists of a relay.

In addition, the apparatus of the present invention additionally includes display means for visually informing of abnormality and disconnection of the earth members and completion of winding up of the spool under the control of the microprocessor.

Due to such a structure, the apparatus of the present invention self-diagnoses when a disconnection detector including an earth member occurs and becomes inoperable even when an operator moves the movable switch when winding up to the next spool, and a failure occurs in the disconnection detector. The worker will be visually informed that it has been done.

Therefore, in the apparatus of the present invention, the inconvenience and difficulty in which the operator must check the earth member by the naked eye is eliminated, and the steel cord including the disconnected wire is further wound up when the disconnection detector including the earth member occurs. It can be prevented to improve the quality and productivity of the steel cord product as well as has the advantage that the operator can be quickly repaired the broken disconnection detector.

Details of the above object and technical configuration and the effects thereof according to the present invention will be more clearly understood by the following detailed description with reference to the drawings showing preferred embodiments of the present invention.

First, FIG. 2 is a schematic structural diagram of an out-in half-charging type steel cord twisted pair machine provided with the apparatus of the present invention, and FIG. 3 is a perspective view showing the spool assembly separately mounted on the twisted pair of FIG.

As shown, in the out-in half-chain type twister, several strands of supply wires w released from a plurality of supply bobbins 30 are associated with each other while passing through the turning roller 31 to counter-counter 32 and Guide rollers 33a and 33b are guided to the rotating wheelbase 34.

At this time, the elementary union toward the wheel 34 is moved in the middle of twisting each other by the rotation of the wheel 34, the elementary union passing through the wheel 34 is in the direction of movement while passing through the guide roller 35 After the conversion is made, the drawing drum 36 and the guide roller 37 mounted inside the rotary wheel sequentially pass through the winding spool 38 to be finally made into a steel cord.

In this embodiment, as the winding spool 38, as shown in Fig. 3, a spool assembly in which several (four) spools are connected and assembled in series by an intermediate face plate 38a and a side face plate 38b are used.

On the other hand, in the twisted pair of the above embodiment, the tunnel-type earth member 39 is installed just before the wheel stage 34 passes through the moving path of the element wire w, and the plate-shaped earth member immediately before the drawing drum 36 inside the wheel stage 34. 40 is provided, and when the saw wire earth member 41 is installed on the circumferential surface of the drawing drum 36, and the wire which generated the disconnection among the wires which comprise the moving wire union or steel cord which contains is disconnected, the disconnection is carried out. It is configured to detect the occurrence.

Such a detailed configuration of each of the earth members 39-41 of the present invention and the structure of the electrical circuit connected to these members will be described with reference to FIG. 4.

As shown, each earth member 39-41 is a wire association (w ') or a steel cord (hereinafter referred to as a wire association) in which the earth bodies 39a, 40a, and 41a, each of which is made of a conductor, rotate while themselves rotating. It is installed in close proximity to the normal wire association (w ') when passing through the main body (39a, 40a, 41a) and the wire association does not come into contact, but some wires in the wire association (w') is a broken wire When the disconnected end F which protrudes out of the coalescing body passes, it is comprised so that the end F may contact the earth main body.

On the other hand, the disconnection detection and disconnection detector abnormality detection circuit of the present invention includes the three earth members 39 to 41 and power lines 42a, 42b and 42c for electrically connecting these earth members in series. Voltage is supplied to the three earth members 39-41 through the power lines 42a-42c, and the electrical signals fed back from the earth members are pulsed according to the contact of the element wire w '. The disconnection detection unit 43 to output and the pulse signal inputted from the disconnection detection unit determine whether disconnection of the wire-wound union w 'is performed, and the earth member 39-41 and the disconnection detection unit 43 are searched for abnormality. Connected to the power line 42c of the toothed earth member 41 and to the earth members 39-41 according to a control signal supplied from the microprocessor 44. Disconnection by interrupting supplied electrical signal To the microprocessor 44 and the voltage interrupter 45 including the relay 45a for feeding back an abnormality signal to the microprocessor 30 through the detector 43, the switching element Q1, and the resistance element R1. The display unit 46 which lights the corresponding lamps 46a, 46b, 46c to indicate the disconnection, abnormality of the earth member and disconnection detection unit by turning on the lamps 46a, 46b, 46c, and key data such as operation of the twisted pair and spool setting. It consists of an operation panel 47 for inputting.

The operation state of the twisted pair of the disconnection detector composed of the earth members 39-41 and the disconnection detection unit 43 according to the apparatus of the present invention having such a structure and the abnormality detection is shown in FIG. Looking at it in detail as follows.

Figure 5 is a flow chart showing the operation of the twisted pair according to the method of the present invention, the operator first assembled the desired number of spools using the intermediate face plate 38a and side face plate 38b and connected in series. After mounting to the winder (see Figs. 2 and 3), the operation panel 47 of Fig. 4 is operated to set n spools corresponding to the number of spools currently mounted (hereinafter referred to as n) (step n). ST10) When the operation switch of the operation panel 47 is pressed, the microprocessor 44 drives a drive device not shown in the drawing to start operation of the twisted pair.

The element wires w released from the respective supply bobbins 30 by the operation of the stranded wires are associated with each other by the pull-out force applied by the drawing drum 36 mounted inside the wheel base 34 to move. Twisting occurs in the process, the stranded wire union (w ') is thus wound into a steel cord having a constant pitch and twisting direction is wound on the spool 38 of the winder.

Meanwhile, the element wire union w 'passes through the cylindrical earth member 39, the plate earth member 40, and the toothed earth member 41 provided on the movement path, which forms the element wire union w'. As long as the disconnection of the element wires does not occur, the element wire association w 'is moved at a constant distance from the earth bodies 39a to 41a of these earth members 39 to 41, thereby moving the element wire association w' and the earth member. There is no contact between (39-41).

In the process of producing the steel cord by the movement and twisting of the wire (w) as described above, the disconnection detecting unit 43 of FIG. 4 generates a voltage at the start of the operation of the twisted pair and thus the power line 42a-42c. Supplies a voltage to the earth bodies 39a-41a of the cylindrical earth member 39, the plate-like earth member 40, and the toothed earth member 41, which are connected in series therewith, and also to the microprocessor 44. Supply the appropriate voltage.

As such, in the state where the voltage is supplied to each of the earth members 39-41, the microprocessor 44 performs disconnection of the element wire w 'and whether the earth members 39-41 and the disconnection detection unit 43 operate. In order to detect the periodicity, the voltage input from the disconnection detector 43 is periodically checked.

At this time, when disconnection occurs in at least one of the element wires w constituting the element wire association w ', the disconnected end is in contact with the earth bodies 39a-41a of the earth members 39-41. As a result, the voltage supplied to the earth members 39-41 is bypassed to ground through the contact portion. As a result, the ground potential (0V) is supplied to the disconnection detecting unit 43, and the ground potential is input again to the microprocessor 44.

Meanwhile, when 0 V is input from the disconnection detecting unit 43, the microprocessor 44 determines that disconnection has occurred in some element wires w of the element association w '(step; ST30) and immediately stops the operation of the twisted pair. (Step ST70), the lamp 46a of the display unit 46 is turned on to inform the worker of disconnection.

In addition, the microprocessor 44 detects the disconnection of the element wire union (w ') through the above process and operates the disconnection detector including the earth members 39-41 and the disconnection detection unit 43. In order to check, the switching element Q1 of the voltage interrupter 45 is turned on every predetermined time.

When the switching element Q1 of the voltage interrupter 45 is turned on, the voltage of the power supply terminal Vcc is bypassed to ground through the coil of the relay 45a, so that the coil of the relay 45a is excited and its contact (switch) To be turned on.

When the contact of the relay 45a is conducted, the voltage supplied from the disconnection detecting section 43 to each earth member 39-41 is bypassed to ground through the contact of the power line 42c and the relay 45a. Similarly, 0 V is supplied to the microprocessor 30.

As such, when a voltage of 0 V is input from the disconnection detection unit 43 during the operation period of the earth members 39-41, the earth members 39-41 and the disconnection detection unit 43 operate normally in the microprocessor 44. To judge.

However, when a voltage having a constant level other than 0 V is input from the disconnection detecting unit 43, it is determined that the earth members 39-41 and the disconnection detecting unit 43 have an abnormality (step; ST40).

As described above, the earth member 39-41 or the disconnection detection unit 43 may be abnormally caused by a failure of the power lines 42a-42c connecting the earth members or the contact between the power line and the earth member. There may be various factors, such as a case where a defective contact occurs or a failure of the disconnection detecting unit 43.

When it is determined that the disconnection detector including the earth member does not operate normally, the microprocessor 44 causes the spool 38 currently being wound among several spools mounted on the winder to be continuously wound so that the winding is completed. (Step; ST60), stops the operation of the twisted pair at the time when the winding of the spool is completed (step; ST70) and turns on the lamp 46B of the display unit 46 to inform the worker of the breakage detector. Given.

At this time, if the operator presses the operation switch of the operation panel 47 in a state in which an abnormality (failed) disconnection detector is not repaired to the normal state, the twisted pair is not operated, and thus the next spool cannot be produced. Done.

On the other hand, when disconnection does not occur and it is determined that the disconnection detector including the earth member is normally operated, continuous winding of the steel cord is made on the spool 38 by the preset number through the operation panel 47. (ST50), the lamp 47c of the display unit 46 is turned on to inform the operator that the predetermined number of spools have been produced, and then the operation of the twisted pair is stopped.

In the above described the case where the present invention applied to the twister of the out-in vancha type as an embodiment, but the present invention is not limited to this can be applied to any type of twister that is currently used in the production of steel cord Of course.

In addition, in the apparatus of the present invention, the installation position including the number and type of earth members installed on the movement path of the supply wire or the element wire assembly is understood from the following description of the claims of the present invention. Various modifications may be made within the scope of the technical idea.

As described above, according to the present invention, the disconnection of the wire is detected by a plurality of earth members installed on the movement path of the wire association when the steel cord is produced through the twisted pair, and the disconnection detection device for detecting the disconnection of the wire If the abnormality of the disconnection detection device is detected by checking the normal operation of the twisted pair from time to time, it will be notified visually to the operator and prevent the winding on the next spool. It is expected.

First, in the disconnection detection apparatus of a conventional steel cord twisted pair, the operator has to inconvenience visually detecting whether the earth member is broken, but in the present invention, since the abnormality of the disconnection detector is automatically detected, the worker's workload is reduced accordingly. Productivity is increased.

In addition, in the present invention, when an abnormality of the disconnection detector is detected, the operator is notified of the disconnection detector as an alarm light signal so that the operator can quickly identify the disconnection detector abnormality and take action thereon.

In addition, the present invention can immediately improve the quality of the winding spool since the failure is detected immediately when the failure of the disconnection detector is detected because the steel cord including the wire disconnected on the spool of the winding machine is prevented from being wound.

Claims (6)

In a method of detecting the disconnection of element wires while a disconnection detector including at least three earth members is installed on the movement path of the element wires so that the steel cord obtained by twisting the element wires is wound around the winding spool: (1) detecting the disconnection of the wire which is moving and the abnormality of the disconnection detector using the earth member; (2) discontinuing operation of the twisted pair at that time when disconnection is detected from any one earth member as a result of the sensing; And (3) When the disconnection detection device detects an abnormality, the current spool is wound as it is, and the operation of the twisted pair is suppressed for the next spool regardless of external interruption. Disconnection detector self-diagnosis method of the steel cord twisted pair characterized in that the made. The disconnection detector self-diagnosis method of claim 1, wherein the interrupt is an operation start signal of the twisted pair by an operator's operation. For steel cord twisted pairs that make steel cords by twisting multiple strands: (1) at least three earth members provided around the moving path of the element wires so that the ends of the disconnected element wires contact; (2) a disconnection detection unit for supplying an electrical signal to the earth member and pulsed an electrical signal fed back from the earth member according to whether the element wire is in contact with the moving element; (3) a microprocessor for judging the disconnection of the wire by the pulse signal from the disconnection detecting unit and generating a control signal for detecting the abnormality of the disconnection detector composed of the earth member and the disconnection detecting unit; And (4) a voltage interrupting means for feeding back an electrical signal supplied to the earth member according to a control signal supplied from the microprocessor and feeding back a signal of the disconnection detector to the microprocessor through the disconnection detecting unit. Self-diagnosis device for disconnection detector of steel cord twisted pair. 4. The self-detection device as set forth in claim 3, wherein the earth members are electrically connected in series with each other. 4. The earth member of claim 3, wherein the voltage interrupting means is connected to at least one of the earth members and the earth member is connected to at least one of the earth members by the control of the microprocessor. Disconnection detector self-diagnosis device of steel cord twisted pair, characterized in that it consists of a relay to bypass the electrical signal of the ground to ground. 4. The self-diagnosis apparatus for a twisted pair apparatus according to claim 3, further comprising a display unit which visually displays whether the earth member and the disconnection detector are abnormal, the disconnection occurrence, and the completion of the spool winding under the control of the microprocessor.