KR20230147886A - Stranding machine with automatic tension control function - Google Patents

Abstract

A twisting machine capable of automatically adjusting tension is disclosed. According to one aspect of the present invention, a twisting machine for producing a strand by drawing out a plurality of wires wound around a plurality of bobbins by a capstan, comprising: a cradle to which a first rotation axis of the bobbin is rotatably coupled; a brake wheel coupled to the first rotation axis of the bobbin so as to rotate together with the bobbin; a brake line wrapped around the brake wheel to provide friction when the brake wheel rotates; A twisting machine capable of automatically adjusting tension may be provided, including a tension control mechanism that adjusts the tension acting on the break line according to the winding amount of the wire wound around the bobbin.

Description

Stranding machine with automatic tension adjustment {STRANDING MACHINE WITH AUTOMATIC TENSION CONTROL FUNCTION}

The present invention relates to a twisting machine capable of automatically adjusting tension.

A strand is produced by twisting multiple element wires, and a product produced by twisting multiple strands one more time is called a wire rope. Wire rope is a product widely used in various industrial fields. For example, it is used to transmit power or support loads in ships, machinery, aircraft, cranes, elevators, cable cars, bridges, etc.

A stranding machine is a device that can produce strands by twisting a plurality of wires, and the general configuration of the stranding machine is shown in Figures 1 to 4 of the prior document (Registered Utility Model No. 20-0234146).

Meanwhile, when a plurality of wires are unwound from a plurality of bobbins, if the tension acting on some wires is different from the tension acting on the remaining wires, defects may occur in the strand produced by the twisting machine.

In order to solve this problem, in a conventional twisting machine, a brake wheel 40 is installed on the rotation axis of the bobbin 12, as shown in FIG. 3 of the above-mentioned prior document, and a chain 42 that applies frictional force to the brake wheel 40 is used. ) was generally configured so that the tension of the wire coming out of the bobbin 12 could be adjusted by adjusting the tension of the chain 42 by the screw mechanism 44.

However, if the amount of winding of the wire wound on the bobbin decreases as the process progresses, the tension acting on the wire may vary. However, in the conventional stranding machine, the friction force acting on the bobbin is automatically adjusted according to the change in the amount of winding of the wire during the process. Improvement is required as there is no means to adjust it.

Republic of Korea Patent Publication No. 10-1420354 (2014.07.16, Yeonseongi) Republic of Korea Registered Utility Model Publication No. 20-0234146 (2001.09.26, Yeonseongi)

An embodiment of the present invention is a stranded wire capable of automatically adjusting tension by automatically adjusting the friction force acting on the bobbin by automatically adjusting the tension acting on the break line according to the change in the winding amount of the wire wound on the bobbin without stopping the stranding machine. Provides energy.

According to one aspect of the present invention, a twisting machine for producing a strand by drawing out a plurality of wires wound around a plurality of bobbins by a capstan, comprising: a cradle to which a first rotation axis of the bobbin is rotatably coupled; a brake wheel coupled to the first rotation axis of the bobbin so as to rotate together with the bobbin; a brake line wrapped around the brake wheel to provide friction when the brake wheel rotates; A twisting machine capable of automatically adjusting tension may be provided, including a tension control mechanism that adjusts the tension acting on the break line according to the winding amount of the wire wound around the bobbin.

The tension adjustment mechanism includes a second rotation shaft rotatably coupled to the cradle, a first rotation arm and a second rotation arm each coupled to the second rotation shaft so as to rotate together with the second rotation shaft, and the first rotation axis. a roller assembly including a roller rotatably coupled to a first end of the rotary arm; and a spring coupled to the cradle to provide elastic force to the roller assembly so that the roller can be maintained in close contact with the wire wound around the bobbin, and the first end of the brake line is configured to rotate the second rotation. It may be coupled to the end of the arm.

When the winding amount of the wire wound around the bobbin decreases, the first rotary arm rotates by the elastic force of the spring, and the second rotary arm that rotates together with the first rotary arm acts on the break line. Tension is reduced, and frictional force acting on the brake wheel by the brake line may be reduced.

A pair of first rotation arms are coupled to the second rotation axis to support both ends of the roller, and the first rotation arm has a second end extending in a direction opposite to the first end about the second rotation axis. The roller assembly further includes a connection arm connecting second ends of the pair of first rotation arms, and the spring has both ends coupled to a support arm coupled to the cradle and the connection arm. It may include a plurality of coil springs.

A proximity sensor coupled to the cradle and detecting the distance to the outer peripheral surface of the plane cam coupled to the second rotation shaft; And it may further include a database in which the measured value of tension acting on the wire coming out of the bobbin is matched to the detected value of the proximity sensor and stored.

a display unit that displays tension acting on the wire for the plurality of bobbins; And it may further include a control unit that receives a detection value from the proximity sensor, loads a tension measurement value matching the received detection value from the database, and transmits it to the display unit.

an adjustment screw screwed to the cradle and to which a second end of the brake line is coupled; an adjustment screw rotating unit that rotates the adjustment screw to adjust tension acting on the brake line; And a control unit that receives a detection value from the proximity sensor and loads a tension measurement value matching the received detection value from the database to control the adjustment screw rotation unit so that the difference with the preset value can be compensated. You can.

According to an embodiment of the present invention, the friction force acting on the bobbin can be automatically adjusted by automatically adjusting the tension acting on the break line according to the change in the winding amount of the wire wound on the bobbin without stopping the twisting machine, and as a result, the friction force acting on the bobbin can be automatically adjusted. The tension acting on the wire when it is unwound can be kept almost constant despite changes in the winding amount of the wire.

1 is a diagram of a twisting machine capable of automatically adjusting tension according to an embodiment of the present invention;
Figure 2 is a partially enlarged view of Figure 1,
Figure 3 is a partial enlarged view of Figure 2,
Figures 4 and 5 are perspective views showing the bobbin assembly of Figure 3 separated from different angles;
Figure 6 is a front view of the bobbin assembly of Figure 3;
Figure 7 is a cross-sectional view taken along line A-A of Figure 6;
Figure 8 is a cross-sectional view taken along line B-B of Figure 6;
Figure 9 is a cross-sectional view taken at line C-C of Figure 6;
FIG. 10 is a diagram showing components necessary to utilize the detection value of the proximity sensor of FIG. 4.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

Terms used in the embodiments of the present invention, unless clearly defined in a different sense, may be interpreted as meanings that can be generally understood by those skilled in the art to which the present invention pertains, and may only be interpreted as specific meanings. It will be viewed as an example to explain the embodiment, but there is no intention to limit the present invention.

In this specification, the singular form will be considered to also include the plural form unless otherwise specified.

Additionally, when a part is described as “including” a certain element, it means that the part may further include other elements.

Additionally, when a component is described as “above” it means above or below the component, and does not necessarily mean that it is located above the direction of gravity.

Additionally, when a component is described as being “connected” or “coupled” to another component, it does not only mean that the component is directly connected or coupled to the other component, but also indirectly through another component. It may also include cases where it is connected or combined.

In addition, terms such as first and second may be used to describe a certain component, but these terms are only used to distinguish the component from other components, and the essence or order of the component is determined by the term. It is not intended to limit the order or the like.

FIG. 1 is a diagram of a twisting machine capable of automatically adjusting tension according to an embodiment of the present invention, FIG. 2 is a partially enlarged view of FIG. 1, and FIG. 3 is a partially enlarged view of FIG. 2.

Referring to Figures 1 to 3, the twisting machine 10 capable of automatically adjusting tension according to an embodiment of the present invention includes a base frame 100, a cylindrical rotating body 110, a cradle 120, and a bobbin 130. , it may include a capstan 140, a voice 150, and a winding spool 170.

The cylindrical rotating body 110 is rotatably coupled to the base frame 100 about the central axis of the cylindrical rotating body 110 and can be rotated by the first drive motor, and is pulled out from the bobbin 130 to form a cylindrical rotating body. Rotational force can be applied to the wire (E) flowing into the voice 150 via (110).

Within the cylindrical rotating body 110, a plurality of bobbins 130 supported by a plurality of cradles 120 may be arranged in a row, for example.

The cradle 120 may be rotatably coupled to the cylindrical rotating body 110 through a pair of couplings 111. For example, a pair of couplings 111 may be coupled to the inward flange of the cylindrical rotating body 110 by a bolt or the like, and the cradle 120 may be coupled to a pair of couplings (111) through the first bearing (B1). 111) can be rotatably coupled. Accordingly, the cradle 120 can maintain a stationary state due to inertia due to its own weight despite the rotational movement of the cylindrical rotating body 110.

The bobbin 130 may be rotatably coupled to the cradle 120. For example, the first rotation shaft 131 of the bobbin 130 may be rotatably supported by the second bearing B2. Accordingly, the bobbin 130 may be rotated by the force of the capstan 140 pulling the wire E wound around the bobbin 130.

The capstan 140 is rotatably coupled to the base frame 100 and can be rotated by a second drive motor (not shown), and can be pulled out by pulling the wire E wound around the bobbin 130. . Since the capstan 140 is a known configuration, detailed description thereof will be omitted.

The voice 150 may be coupled to the base frame 100, and is pulled out from the bobbin 130 and passes through the cylindrical rotating body 110 to form a plurality of incoming wires (E) into one strand (S). ) can be discharged. Since the poise 150 is a well-known configuration in the art, a detailed description thereof will be omitted.

The strand (S) discharged from the voice 150 may be wound on the winding spool 170 through the straightener 160.

The straightener 160 is a concept that can correct twisting of the strand (S) and adjust the strand pitch by passing the strand (S) in an unstable twisted state between a plurality of rollers, and includes an oval twister. Since this is a well-known configuration in the technical field, a detailed description thereof will be omitted.

The winding spool 170 is rotatably coupled to the base frame 100 and can be rotated by a third drive motor, and can wind the strand (S) discharged from the capstan 140 or straightener 160.

FIGS. 4 and 5 are perspective views showing the bobbin assembly of FIG. 3 separated from different angles, FIG. 6 is a front view of the bobbin assembly of FIG. 3, FIG. 7 is a cross-sectional view taken from A-A of FIG. 6, and FIG. 8 is a cross-sectional view taken from B-B of FIG. 6, FIG. 9 is a cross-sectional view taken from C-C of FIG. 6, and FIG. 10 is a diagram showing the components necessary to utilize the detection value of the proximity sensor of FIG. 4. .

4 to 10, the twisting machine 10 capable of automatically adjusting tension according to an embodiment of the present invention includes a brake wheel 132, a brake line (L), and a tension adjustment mechanism 200 in addition to the above-mentioned components. ) and may further include a proximity sensor 300, a database 400, a display unit 500, an adjustment screw rotation unit 600, and/or a control unit 700.

The brake wheel 132 may be coupled to or fixed to the first rotation shaft 131 of the bobbin 130.

The brake line (L) may be wound around the brake wheel 132 to provide friction when the brake wheel 132 rotates.

For example, the first end of the brake line (L) may be coupled to the tension adjustment mechanism 200, the second end of the brake line (L) may be coupled to the cradle 120, and the brake line (L ) may extend in a curved manner while being in close contact with the outer peripheral surface of the brake wheel 132 between the first and second ends.

Therefore, when the brake wheel 132 rotates together with the bobbin 130 according to the rotation of the bobbin 130, frictional force may occur between the brake wheel 132 and the brake line (L).

Meanwhile, an adjustment screw 121 may be screwed to the cradle 120, and the second end of the brake line (L) may be coupled to the adjustment screw 121. Accordingly, the tension acting on the brake line (L) may be manually adjusted by the operator turning the adjustment screw 121 to move it back and forth.

The tension control mechanism 200 is capable of adjusting the tension acting on the break line (L) according to the winding amount of the wire (E) wound on the bobbin 130, and is characterized by implementing this mechanically.

To this end, the tension adjustment mechanism 200 may include a roller assembly 210 and a spring 220.

The roller assembly 210 may include a second rotation shaft 211, a first rotation arm 212, a second rotation arm 213, and a roller 214, and may further include a connection arm 215. .

The second rotation axis 211 may be arranged parallel to the first rotation axis 131 of the bobbin 130 and rotatably coupled to the cradle 120.

The first rotation arm 212 and the second rotation arm 213 may be coupled to or fixed to the second rotation shaft 211.

The first rotation arm 212 and the second rotation arm 213 may extend in the radial direction of the second rotation axis 211.

Therefore, when the first rotation arm 212 rotates around the second rotation axis 213, the second rotation arm 213 coupled to the first rotation arm 212 through the second rotation axis 213 also rotates. can do.

The first rotation arm 212 may include a first end and a second end extending in opposite directions about the second rotation axis 211.

Meanwhile, the first end of the brake line (L) may be coupled to the end of the second rotary arm 213.

The roller 214 is rotatably coupled to the first end of the first rotary arm 212 to reduce frictional resistance when in close contact with the wire E wound around the bobbin 130.

The third rotation axis of the roller 214 may be arranged parallel to the first rotation axis 131 of the bobbin 130.

Meanwhile, both ends of the third rotation axis of the roller 214 may be supported by a pair of first rotation arms 212.

The connection arm 215 may connect the second ends of the pair of first rotation arms 212.

The spring 220 is coupled to the cradle 120 to provide elastic force to the roller assembly 210 so that the roller 214 can be maintained in close contact with the wire E wound around the bobbin 130. there is.

For example, the spring 220 may include a plurality of coil springs, and both ends of each of the plurality of coil springs may be coupled to the connection arm 215 and the support arm 122 of the cradle 120.

Therefore, when the amount of wire E wound around the bobbin 130 decreases, the roller 214 of the first rotating arm 212 moves closer to the outer peripheral surface of the bobbin 130 due to the elastic force of the spring 220. It can rotate so that the tension acting on the brake line (L) can be reduced by the second rotary arm 213 that rotates together with the first rotary arm 212, and the tension acting on the brake line (L) can be reduced. When reduced, the friction force acting on the brake wheel 132 by the brake line (L) may be reduced.

As a result, when the amount of winding of the wire E wound around the bobbin 130 decreases, the distance from the point where the wire E is drawn from the bobbin 130 to the center of the bobbin 130 becomes shorter, and as a result, In order to maintain the rotational torque of the bobbin 130, the tension acting on the wire E must be increased, but in the present invention, this can be offset by reducing the friction force acting on the brake wheel 132.

Meanwhile, a flat cam 216 may be coupled to the second rotation axis 211 of the roller assembly 210.

The flat cam 216 may be coupled to the second rotation shaft 211 and rotate together with the second rotation shaft 211 .

The proximity sensor 300 is coupled to the cradle 120 and can detect the distance to the outer peripheral surface of the flat cam 216.

The separation distance to the outer peripheral surface of the flat cam 216 detected by the proximity sensor 300 may vary when the second rotation shaft 211 rotates due to the shape of the flat cam 216. This is because the radius from the center of the second rotation axis 211 to the outer peripheral surface of the flat cam 216 is different along the circumferential direction of the flat cam 216.

In the database 400, the measured value of the tension acting on the wire E unwound from the bobbin 130 may be matched to the detected value of the proximity sensor 300 and stored. That is, the detection value of the proximity sensor 300 and the measured value of the tension acting on the wire E unwound from the bobbin 130 can be matched to each other and created into a database. Therefore, if the database 400 is established in advance, the tension acting on the wire E coming out of the bobbin 130 can be estimated based on only the detection value of the proximity sensor 300.

For example, when the separation distance from the proximity sensor 300 to the outer peripheral surface of the flat cam 216 is 1 mm, the proximity sensor 300 can generate an electrical signal of 10 mA, and at this time, the tension acting on the wire E The actually measured value, for example, 2 kg, may be stored in the database 400.

As another example, when the separation distance from the proximity sensor 300 to the outer peripheral surface of the flat cam 216 is 2 mm, the proximity sensor 300 can generate an electrical signal of 20 mA, and at this time, the tension acting on the wire (E) The actually measured value, for example, 3 kg, may be stored in the database 400.

The display unit 500 may receive the tension acting on the wire E drawn from each bobbin 130 for the plurality of bobbins 130 from the control unit 700 and display it, for example, on a display panel, etc. may include.

Therefore, the operator can check in real time the tension acting on the plurality of wires E drawn from the plurality of bobbins 130 through the display unit 500, and if the tension of some of them is outside the preset range, the strand ( It may be determined that there is a risk of a defect occurring in S), and follow-up measures may be taken, such as stopping the twisting machine 10 and turning the adjustment screw 121.

The adjustment screw rotating unit 600 may adjust the tension acting on the brake line (L) by rotating the adjustment screw 121, and may include, for example, a motor that rotates the adjustment screw 121.

The control unit 700 may control the display unit 500 and the adjustment screw rotation unit 600 based on the detection value of the proximity sensor 300.

As an example, the control unit 700 may receive a sensed value from the proximity sensor 300, load a tension measurement value matching the sensed value received from the proximity sensor 300 from the database 400, and load the database 400. The tension measurement value loaded at 400 may be transmitted to the display unit 500 so that it is displayed as the tension acting on the wire E.

As another example, the control unit 700 may receive a sensed value from the proximity sensor 300, load a tension measurement value matching the sensed value received from the proximity sensor 300 from the database 400, and load the database 400. If the tension measurement value loaded at (400) is different from the preset value, for example, the tension acting on the wire (E) at the beginning of the process, the adjustment screw rotation unit 600 is controlled so that the difference can be compensated or offset. The adjustment screw 121 can be rotated.

Therefore, in the present invention, the tension adjustment mechanism 200 can mechanically compensate for the change in tension acting on the wire E caused by the change in the winding amount of the wire E wound on the bobbin 130. , Nevertheless, some remaining tension changes that are not compensated for may be managed by monitoring through the display unit 500 or may be additionally compensated by automatic control of the adjustment screw rotation unit 600.

Although the above description focuses on preferred embodiments of the present invention, this is only an example and does not limit the present invention. Those of ordinary skill in the technical field to which the present invention pertains can modify and change the embodiments in various ways by adding, changing, deleting or adding components, etc., without departing from the technical idea of the present invention as set forth in the claims. It will be possible, and this will also be said to be included within the scope of the rights of the present invention.

10: Stranding machine 100: Base frame
110: cylindrical rotating body 111: coupling
120: Cradle 121: Adjustment screw
122: Support arm 130: Bobbin
131: first rotation axis 132: brake wheel
140: Capstan 150: Voice
160: Straightener 170: Winding spool
200: Tension adjustment mechanism 210: Roller assembly
211: second rotation axis 212: first rotation arm
213: second rotation arm 214: roller
215: connection arm 216: flat cam
220: Spring 300: Proximity sensor
400: database 500: display unit
600: Adjusting screw rotating part 700: Control part

Claims (7)

In a twisting machine that produces a strand by drawing out a plurality of wires wound on a plurality of bobbins by a capstan,
A cradle to which the first rotation axis of the bobbin is rotatably coupled;
a brake wheel coupled to the first rotation axis of the bobbin so as to rotate together with the bobbin;
a brake line wrapped around the brake wheel to provide friction when the brake wheel rotates; and
A twisting machine capable of automatically adjusting tension, including a tension adjustment mechanism that adjusts tension acting on the break line according to the winding amount of the wire wound around the bobbin. According to paragraph 1,
The tension adjustment mechanism is,
A second rotation shaft rotatably coupled to the cradle, a first rotation arm and a second rotation arm each coupled to the second rotation shaft so as to rotate together with the second rotation shaft, and a first end of the first rotation arm. A roller assembly including a roller rotatably coupled to; and
A spring coupled to the cradle to provide elastic force to the roller assembly so that the roller can remain in close contact with the wire wound around the bobbin,
A twisting machine capable of automatically adjusting tension, wherein the first end of the break line is coupled to the end of the second rotary arm. According to paragraph 2,
When the winding amount of the wire wound around the bobbin decreases, the first rotary arm rotates by the elastic force of the spring, and the second rotary arm that rotates together with the first rotary arm acts on the break line. A stranding machine capable of automatically adjusting tension in which the tension is reduced and the frictional force acting on the brake wheel by the brake line is reduced. According to paragraph 2,
A pair of first rotation arms are coupled to the second rotation shaft to support both ends of the roller,
The first rotation arm further includes a second end extending in a direction opposite to the first end about the second rotation axis,
The roller assembly further includes a connection arm connecting second ends of the pair of first rotation arms,
The spring is a twisting machine capable of automatically adjusting tension, including a support arm coupled to the cradle and a plurality of coil springs whose both ends are coupled to the connection arm. According to paragraph 2,
A proximity sensor coupled to the cradle and detecting the distance to the outer peripheral surface of the plane cam coupled to the second rotation shaft; and
A twisting machine capable of automatically adjusting tension, further comprising a database in which the measured value of tension acting on the wire coming out of the bobbin is stored by matching the detected value of the proximity sensor. According to clause 5,
a display unit that displays tension acting on the wire for the plurality of bobbins; and
A twisting machine capable of automatically adjusting tension further comprising a control unit that receives a detection value from the proximity sensor, loads a tension measurement value matching the received detection value from the database, and transmits it to the display unit. According to clause 5,
an adjustment screw screwed to the cradle and to which a second end of the brake line is coupled;
an adjustment screw rotating unit that rotates the adjustment screw to adjust tension acting on the brake line; and
Tension further comprising a control unit that receives a detection value from the proximity sensor and controls the adjustment screw rotation unit to load a tension measurement value matching the received detection value from the database so that the difference with the preset value can be compensated. Stranding machine with automatic adjustment.

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