KR19980087839A - Low voltage power supply / signal control wire and its manufacturing method - Google Patents

Abstract

The present invention is excellent in the discharge / removal effect of noise by installing the electric wires and the ground wires in twisted units in each group, and installing them at the corresponding positions therein, and the manufacturing process is easier than when twisting the whole wires collectively. A low voltage power supply / signal control wire and a method of manufacturing the same, the multi-wire having a central axis and having electrical conductors capable of performing data transmission and power transmission at the same time. Each of the groups of wires is classified into a set of electrical conductors, and is formed by being axially in close contact with each other in a twisted shape. A single ground wire extending linearly in each of the groups of electrical conductors is in close contact with each other so as to be in electrical contact with each other. The generated noise is disposed so that the generated noise can be extinguished or discharged to the ground. And an exterior to electrically shield the outside from the outside of the group of electrical conductors constituting each pair of ground wires.

Description

Low voltage power supply / signal control wire and its manufacturing method

The present invention relates to a low voltage power supply / signal control wire and a method of manufacturing the same. More specifically, a low voltage power supply for removing noise generated on a line by twisting a conductive wire and a conductive ground wire to a predetermined position of an electric control cable in parallel. A signal control wire and a method of manufacturing the same.

In general, circular cables are used for relatively high speed data transfer between various system components in data processing networks.

These cables allow one wire twisted in pairs to transmit data or control signals, the other wire twisted in pairs to be used as a return line for the signal, or one wire to transmit data or control signals, and the other leads Allow power to be transferred.

However, a type of cable, an insulating vinyl insulation sheathed cable (CVV), is used for mutual electromagnetic induction, mutual electrostatic induction, and external harmonics introduced on the control line. The grounding conductor for discharging to the ground is not formed by electrically connecting the induction disturbance caused by the induced induction and the inductance generated in the return path of the control cable to the ground potential, thereby causing data error.

In addition, the vinyl insulation vinyl sheathed cables (CVVS, CVV-SB) for controlling the shielding part have a metal tape or a metal mesh layered for shielding on the outside of the control line, so that part of the noise due to mutual induction generated on the control line is removed. It is discharged to the ground as the terminating ground to reduce the disturbance caused by some noise.

However, since the shielding control vinyl insulating vinyl sheathed cables (CVVS, CVV-SB) are made of a metal body used for grounding on the outside, it is difficult to discharge some of the noise generated from the cables to the ground as the terminal ground. As the length of the cable is not easy, the accuracy of the transmitted data is much lower due to disturbances such as electrostatic induction, electromagnetic induction, and high frequency.

In order to solve this problem, Korean Patent Application No. 87-8510 (name: cable having a corrugated diaphragm) has been proposed to electrically shield each electric wire using a corrugated diaphragm grounded.

According to the cable having a corrugated diaphragm, as shown in FIG. 1, the cable having a corrugated diaphragm relates to a circular or flat electrical cable, in which the conductors are separated along the entire axial length by the corrugated diaphragm. It is intended to be electromagnetically isolated.

At this time, the conductive wires 4a to 4n and 14a to 14n use ordinary insulated jacketed wires, and the corrugated separating member is formed to electromagnetically insulate each of the conductive wires 4a to 4n and 14a to 14n along its entire length. 6,16, ie, circular and flat cable structures comprising a diaphragm, in a broad sense, grooves are formed on both sides of the diaphragm, and a conductive layer is disposed in each groove. These conductive layers are electrically connected. Normal insulated jacketed leads are placed in each groove, and the axes of the leads are in a common trajectory. In use, on the other hand, these conductive layers are maintained at a predetermined electrical potential such that each conductor is electromagnetically isolated along its entire axial length.

In addition, the conductive wires 4 and 14 have an inner sheath, which is an inner first conductive member, surrounding the core 2, and an outer sheath 12, which is a second conductive member that is radially outer, moves radially outward from the inner sheath. Spaced apart. The inner sheath and the outer sheath 12 cooperate with each other to form an annular space 10 extending axially in the interior of the cable.

The space portion 10 formed between the inner sheath and the outer sheath 12 has a corrugated first diaphragm 6, and the first diaphragm 6 is formed on the inner surface 6I of the first diaphragm 6. The tops of the floor are arranged in the space 10 so as to contact the outer surface of the inner sheath as indicated by the contact points 8.

In this case, the first diaphragm 6 may be provided with a coating layer of a conductive material on the inner side 6I and the outer side 6E, and the entire first diaphragm 6 may be formed of a conductive material such as a metal thin plate. have.

Thus, in the cable having a corrugated diaphragm as shown in the above embodiment, the respective sheaths and the corrugated diaphragm 6, 16 are electrically connected to a predetermined electrical potential, typically ground potential, electromagnetically along the entire length of each conductor. Since isolated, these cables can be said to provide good characteristics as signal carrying leads.

However, the conventional electric control cable has a metal tape or a metal mesh layered for shielding on the outside of the control line only in the case of the vinyl insulation vinyl sheathed cable (CVVS, CVV-SB) for controlling the shielding part, so that the length of the line is long. There is a problem that the accuracy of the data to be transmitted is significantly lowered due to interference such as electrostatic induction, electromagnetic induction, and high frequency.

In addition, the cable having the corrugated diaphragm serves as a ground wire because the sheaths of the conductor and the corrugated diaphragm 6 and 16 are electrically connected to the ground potential, but in view of the cross-section, the conductive diaphragm 6 and 16 is the lead wire. Since it is to be formed as a curved film between them, the volume and weight of the cable, as well as the volume and weight of the cable is significantly increased compared to the general cable, there is a problem that the manufacturing cost is also increased accordingly.

In addition, when the diaphragm is in close contact with the inner and outer conductors through the diaphragm 6 and 16, the contact point increases, so that a great deal of attention is required in the manufacture in order to ensure a close contact. .

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described prior art, and forms a conductive wire (ground wire) in a linear shape in close contact with a control line, and twists the control line and the ground line to self-attenuate the noise generated on the line, thereby remaining noise. Its purpose is to provide a low voltage power supply / signal control wire to prevent noise by discharging components to the ground.

Another object of the present invention, by varying the assembly of the control wires in contact with the number and the characteristics of each of the control wires in contact with the thickness of the conductive wire (for grounding) to configure a variety of grounding wires constituted in one cable, respectively It is to provide a low voltage power supply / signal control wire.

In addition, another object of the present invention is to repeatedly form the step of forming the inner conductor between each layer of the electric conductor group including the ground wire, if additional electrical conductors need to be added during the manufacture of the wire repeatedly There is provided a method for manufacturing a low voltage power supply / signal control wire which can be easily expanded by conducting wire layers.

In order to achieve the above object, according to a preferred embodiment of the present invention, in a multi-cable having a central axis and having electrical conductors such that data transmission and power transmission can be performed in combination at the same time, the electrical conductors are each It is classified into a set of electrical conductor groups, and is formed by being in close contact in the axial direction in a twisted shape.As a result, the noise generated from the electrical conductors is caused by a single ground wire closely contacting and electrically contacting each group of electrical conductor groups. The low voltage power supply / signal control wire is disposed so as to be extinguished or discharged to the ground, and the cover layer is designed to electrically shield the outside of the group of electric conductors in which the electric conductors and the ground wires are formed. Is provided.

In addition, as the electric conductor group is formed of a plurality of layers and the inner layer exterior is formed between the layers, additional electric conductor layers can be added.

On the other hand, preferably according to an embodiment of the present invention, in a multi-cable having an electric conductor therein so that the transmission of data signals and the transmission of power can be performed simultaneously, one set of bundles of the electric conductors in a predetermined number A first step of forming the wires in a twisted shape together with the electric wires by closely contacting a single ground wire to correspond to the electric wires corresponding to the respective groups; Provided is a method of manufacturing a low voltage power supply / signal control wire having a second step of providing a plurality of sheaths in close contact with each other for electrical insulation from outside of the electric conductors.

In addition, the method of manufacturing the low voltage power supply / signal control wire repeats the first step in which a plurality of electric wires are arranged to form a multi-layer, and installs an inner exterior between the layers so that the multi-layer electric wire layers can be electrically insulated. A further step of enabling an additional extension of the conductor layer is further included.

Therefore, the low voltage power supply / signal control wire according to the present invention having the above-described configuration is arranged in a twisted shape by closely arranging the conductive wire and the ground wire in a corresponding position, and forming various insulating coating layers so as to be electrically insulated from the outside. During transmission of power or transmission of data, noise generated from the conductors is attenuated or discharged to the ground.

1 is a view showing a cross section of a cable configured with a conventional grounding diaphragm,

2 is a cross-sectional view of a low voltage power supply / signal control wire according to an embodiment of the present invention;

3A, 3B, 3C, and 3D illustrate low voltage power / signal control wires configurable according to an embodiment of the present invention;

4A, 4B, 4C, and 4D are side cross-sectional views showing one pair of groups of respective conductors of the composite cable shown in FIGS. 3A, 3B, 3C, and 3D;

5A, 5B, 5C, 5D, 5E, 5F, and 5G schematically illustrate steps of a method of manufacturing a low voltage power / signal control wire according to an embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

30: core, 32: internal exterior,

34: 1 primary closed space part, 36a to 36n: first conductor,

38a to 38n: first ground wire, 40: external built-in,

41: secondary closed space portion, 42a to 42n: second lead wire,

44a to 44n: second ground wire, 46: conductive coating layer,

48: first insulating coating layer, 50: second insulating coating layer.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail with reference to drawings.

2 is a cross-sectional view of a low voltage power supply / signal control wire according to an embodiment of the present invention, wherein the cable includes an elastomer filler or a core 30 at the center in the axial direction, and the central axis of the cable is It extends through the core 30. In this case, the core 30 may be omitted, and a metal thin plate, a metallized film, or the like may be provided in an appropriate form.

The inner casing 32 is made of vinyl tape or the like along the axis of the core 30 in a state spaced apart from the outer side of the core 30 in a radial distance.

Thus, between the core 30 and the inner casing 32 is formed a primary closed space 34 extending in the axial direction in the cable.

A plurality of first conductive wires 36a to 36n are disposed in close contact with the core 30 in the axial direction in the primary closed space 34. Each of the first conductive wires 36a to 36n includes an electric wire surrounded by a predetermined insulating jacket 36E. In this embodiment, two conductive wires are formed in one group to design four groups in the primary closed space 34. However, the design state of the above-described form can be easily changed depending on the intended use or specification.

In the space other than the plurality of first conductive wires 36a to 36n formed in the primary closed space 34 in the axial direction, a filler made of a synthetic polymer or the like is filled.

In this case, the first conductive wires 36a to 36n formed to be in close contact with the core 30 are necessarily in close contact with the core 30 by the filler which is filled in the first closed space 34. It is not required.

In addition, the electric wire of each 1st conducting wire 36 and 42 is tin-plated interlocking wire. Other conductive wires may be formed, and the insulating jackets 36E and 42E of the first conductive wires 36 and 42 may be made of polyolefin or fluorocarbon material.

In addition, a plurality of first ground wires 38a to 38n are formed by being axially in close contact with the insulating jackets 36E and 42E of the first conductive wires 36a to 36n. Since the noise is generated on the track of the first conductive line 36 through the first ground line 38, the noise may be dissipated within the first ground line 38 or discharged to the ground. It is formed in close contact.

At this time, the first ground wires 36a to 36n of each pair may be discharged to the ground by the first ground lines 38 corresponding to the respective first conductive wires 36a to 36n.

In addition, it is preferable that each of the first grounding wires 38 configured at this time is formed one by one regardless of the number of the first conductive wires 36 included in one set.

On the other hand, on the outside of the inner sheath 32, the outer sheath 40, which is composed of insulating paper or the like in the radial direction, is positioned at a predetermined interval apart.

Between the inner sheath 32 and the outer sheath 40 to form a secondary closed space portion 41 extending in the axial direction inside the cable.

A plurality of second conductive wires 42a to 42n are disposed in the secondary closed space part 41 in close contact with the inner sheath 32 in the axial direction.

As in the first closed space 34, the second conductive wires 42a to 42n each include an electric wire surrounded by a predetermined insulating jacket 42E. In this embodiment, two conductive wires are formed in one group so that eight groups are formed in the secondary closed space part 41.

In addition, a plurality of second ground wires 44a to 44n are formed in each pair by being axially in close contact with the insulating jacket 42E of the second conductive wires 42, and the second ground wire 44 is also spiral. Since the noise generated on the track of the second conductive wire 42 is formed through the second ground wire 44 to be extinguished within the second ground wire 44 or discharged to the ground.

On the other hand, a conductive coating layer 46 is formed on the outer surface of the outer casing 40, which is wound with insulating paper, on which aluminum or metallic tape is wound, which is electrically connected to the ground potential at the end of the cable. It is configured to discharge the residual noise component generated in the exterior 40 to the ground.

The first insulating coating layer 48 is formed on the outside of the conductive coating layer 46 is surrounded by a predetermined insulating paper of the same material as the outer outer cover 40. In addition, a second insulating coating layer 50 having an insulating strength, such as polyethylene seed, is formed outside the first insulating coating layer 48.

3A, 3B, 3C, and 3D illustrate low voltage power / signal control wires configurable according to an embodiment of the present invention.

FIG. 3A, like the components shown in FIG. 2, includes an elastomer filler or core 30 centrally in the axial direction, with the central axis of the cable extending through the core 30. In this case, the core 30 may be omitted, and a metal thin plate, a metallized film, or the like may be provided in an appropriate form.

The inner outer shell 32 is formed in a circular trajectory at a position spaced apart from the core 30 by a predetermined distance, and a closed space 34 is formed in the inner outer shell 32.

The plurality of conductive wires 36a to 36n are disposed in close contact with the core 30 in the axial direction. In addition, the conductive wires 36a to 36n formed in the closed space 34 each include electric wires surrounded by a predetermined insulating jacket 36E.

At this time, in FIG. 3A according to the present embodiment, two conductive wires 36 are in one pair, and FIG. 3B is three conductive wires 36, FIG. 3C is four, and in FIG. 3D, five conductive wires are single. It was designed to form each of the jaws. However, the number of conductive wires 36 forming the group and the number of groups disposed in the closed space 34 are not fixedly designed but may be variously changed.

In addition, a plurality of ground wires 38 are formed in close contact with the insulating jacket 36E of the conductive wires 36 in the axial direction of the present cable, so that noise generated on the line of the conductive wires 36 is reduced to the ground wire 38. It is formed so that it can be extinguished within the ground wire 38, or discharged to the ground.

4A, 4B, 4C, and 4D are side cross-sectional views showing one pair of pairs of conductors of the low voltage power / signal control wire shown in FIGS. 3A, 3B, 3C, and 3D.

As shown in Figs. 4A, 4B, 4C, and 4D, each of the conductive wires 36 and the ground wires 38 forming one pair are twisted in a parallel wiring manner so that noise generated on the tracks can be canceled by itself. The residual noise component can be discharged to the ground through the ground line 38.

First, as shown in FIG. 4A, if the components of a pair are two conductive wires 36a and 36b and a ground wire 38, the conductive wires 36a and 36b and the ground wire 38 are respectively 120 degrees out of phase. The twist arrangement is made while maintaining. For example, if the starting point of the first conductive line 36a is a sin curve having a zero degree, the second conductive line 36b has a sin curve of 120 degrees and the ground line 38 has a starting point of 240 degrees. It is arranged in the form of a sin curve.

As described above, if the components constituting a pair of the three conductive wires 36a, 36b, 36c and the ground wire 38 are similar, the conductive wires 36a, 36b, 36c and the ground wire 38 are each 90. The twist arrangement is made while maintaining the phase difference of the figure. For example, if the viewpoint of the first conductive line 36a is in the form of a sin curve of 0 degrees, the sinus curve of the second conductive line 36b is 90 degrees and the third conductive line 36c has a 180 degree view. A sin curve, the ground line 38 is disposed taking the form of a sin curve at 270 degrees.

In addition, if the components constituting a pair in Fig. 4C are four conductive wires 36a, 36b, 36c, 36d and ground wire 38, the conductive wires 36a, 36b, 36c, 36d and ground wire 38 are respectively. The twist arrangement is made while maintaining a phase difference of 72 degrees. For example, the viewpoint of the first conducting line 36a is 0 degrees, the second conducting line 36b is 72 degrees, the third conducting line 36c is 144 degrees, the fourth conducting line 36d is 216 degrees, and the ground line 38 ) Are arranged in the form of a sin curve at 288 degrees.

As in FIG. 4C, if the elements constituting a pair in FIG. 4D are five conductors 36a, 36b, 36c, 36d, and 36f and a ground line 38, the respective conductors 36a, 36b, 36c, 36d, and 36f are used. ) And the ground wire 38 are twisted while maintaining the phase difference of 60 degrees.

As described above, the conductive wires 36 and the ground wires 38, which are formed in one pair, are not necessarily configured to maintain the above-described angles when they are disposed inside the cable, but noise generated between the conductive wires 36 In order to properly cancel, it is preferable to arrange | position so that the said phase difference may be maintained.

5A, 5B, 5C, 5D, 5E, 5F, and 5G schematically show the steps required to construct a low voltage power / signal control wire according to an embodiment of the present invention. Reference numerals in this case are the same as shown in FIG.

First, as shown in FIG. 5A in the first step, a thin metal plate is wound around the core 30 in a spiral manner, and then first inner wires 36a to 36n in an inner row are placed on the core 30. The first ground wire 38 is disposed in close contact with the first conductive wires 36a to 36n corresponding to each pair.

At this time, when the first conductive lines 36a to 36n and the first ground lines 38a to 38n corresponding to the respective groups have already been twisted and manufactured in advance, the first conductive lines 36a in the first step are completed. The step of arranging the first ground wire 38 in close contact with ˜36n) may be omitted.

In addition, the inner sheath 32 is provided while applying pressure in the inner direction to the outside of the first conductive lines 36a to 36n and the first ground lines 38a to 38n corresponding to each pair in two steps (FIG. 5B). ).

In the third step, as in the first step, each pair of the second conductive wires 42a to 42n and the second ground wires 44a to 44n, which are prefabricated and twisted, is closely attached to the inner sheath 32 so that Provided under pressure in the center direction (FIG. 5C).

In addition, in the fourth step, the outer sheath 40, which is in close contact with the outside of the second conductive wires 42a through 42n and the second ground wires 44a through 44n, pressurizes toward the center of the cable and is provided with an insulating paper 40, is provided. (FIG. 5D).

Here, the first ground wires 38a to 38n and the second ground wires 44a to 44n are all tied together at the ends of the cable and connected to the ground potential of the earth. 44) are made in the form of a line rather than a film, so that the connection with the ground potential can be easily performed.

On the other hand, the outer side of the outer outer cover 40 provided in step 4 is provided with a conductive coating layer 46 made of aluminum or metallic tape having excellent conductivity over the entire axial length (step 5; FIG. 5E).

In step 6, a first insulating coating layer 48 is provided on the outside of the conductive coating layer 46 surrounded by a predetermined insulating paper made of the same material as the outer coating 46 (FIG. 5F).

In addition, in step 7, a second insulating coating layer 50 having an insulating strength such as polyethylene seed is provided to the outside of the first insulating coating layer 48 (FIG. 5G).

If additional increase is required, it is possible to repeat the steps 1 to 4 in the above four steps.

On the other hand, the steps required to configure the low-voltage power supply / signal control wire according to an embodiment of the present invention can be changed within the scope without departing from the gist of the present invention, for example, the change of the material of the interior / exterior exteriors In addition, the manufacturing process of the conductive coating layer, the first insulating coating layer, the second insulating coating layer, etc. can be omitted or added to some of the steps.

As described above, according to the low-voltage power supply / signal control wire and the manufacturing method thereof according to the present invention, since the conductors and the ground wires are twisted in each group and provided at the corresponding positions, the entire wires in the cable are twisted all at once. The manufacturing process is easier than when manufacturing in a state, and the ground wires that are in close contact with the conducting wires are provided separately for each group, so that the discharge of noise generated in each group is easily performed, and the electrical performance is also superior to that of the existing cable.

Further, when the terminal grounding of the ground wire is performed at the terminal of the wire, the ground wire is configured in the form of a line rather than a film, so that the terminal ground can be easily performed.

Claims (5)

In a multi-cable having a central axis and having electrical conductors such that data transmission and power transmission can be performed simultaneously in combination, The electric wire is formed by a plurality of wires are classified into a set of electric wire groups, each in close axial direction in a twisted shape, A single ground wire extending linearly for each group of electrical conductors of each set is closely contacted and electrically contacted, so that noise generated in the electrical conductors can be extinguished or discharged to the ground. Low voltage power supply / signal control wire, characterized in that the outer conductor is formed to cover the outside of the electric conductor group constituting each pair of the electric conductor and the ground wire to shield the outside and the outside. The low voltage power supply / signal control wire according to claim 1, wherein the electric conductor group is formed of a plurality of layers, and an inner shield outer layer (32) for shielding each layer is formed between the layers. In the method of manufacturing a multi-cable having an electric wire therein, the transmission of the data signal and the transmission of power at the same time, The electric wires are bundled in a predetermined number to form a set of electric wires, and the single ground wires 38 and 44 are brought into close contact with each other to correspond to the electric wire groups corresponding to the respective wire groups, and the wires are twisted together with the corresponding electric wire groups. Forming a first step; And a second step of providing a plurality of sheaths in close contact with the outside of the electric conductor group to electrically insulate the outside of the electric conductor group. 4. The method of claim 3, further comprising forming a plurality of electric conductor groups in the first step to form a multilayer, and forming inner and outer sheaths between the layers so that the multilayer electric conductor layers can be electrically insulated from each other. A method for manufacturing a low voltage power supply / signal control wire, characterized in that it is made. 4. The method of claim 3, wherein the second step comprises: a second step of providing an outer sheath made of insulating paper in close contact while applying pressure from the outside of the electric conductor layer to the inside thereof; A second step of providing a conductive coating layer 46 formed of a material having excellent conductivity from the outside of the outer sheath 40; A second step of providing a first insulating coating layer 48 made of insulating paper from the outside of the conductive coating layer 46 in close contact; And a second step of providing a second insulating coating layer 50 having an insulation strength of at least polyethylene seed from the outside of the first insulating coating layer 48, in close contact with the second insulating coating layer 48. .