JP5928305B2 - Shielded cable - Google Patents

Description

  The present invention relates to a shielded cable in which the outer periphery of an insulated wire is covered with a shield layer.

  Conventionally, a shielded cable is known in which noise resistance is improved by covering the outer periphery of a plurality of electric wires with a double shield layer.

  The shielded cable described in Patent Document 1 includes a plurality of electric wires in the center portion, a first horizontal shield layer provided on the outer periphery of the plurality of electric wires, and a first electrode provided on the outer periphery of the first horizontal shield layer. 1 buffer layer, a second horizontal shield layer provided on the outer periphery of the first buffer layer, and a sheath provided on the outer periphery of the second horizontal shield layer.

  The first horizontal winding shield layer and the second horizontal winding shield layer are formed by spirally winding a metal wire made of a single wire. The winding direction of the metal strand in the first horizontally wound shield layer and the winding direction of the metal strand in the second horizontally wound shield layer are opposite to each other.

  In this shielded cable, when the winding directions of the metal strands are opposite to each other in the first horizontally wound shield layer and the second horizontally wound shield layer, a plurality of electric wires in the central portion are viewed from the outside of the shield cable. In this case, the gap between the metal strands can be narrowed, and the shielding characteristics (noise resistance) against external electromagnetic waves can be improved. In addition, since this shielded cable has the first buffer layer between the first laterally wound shield layer and the second laterally wound shield layer, the first laterally wound shield layer and the second laterally wound shield layer are provided. It is possible to improve the bending durability of the first and second laterally wound shield layers without contact with the wound shield layer.

JP 2007-311043 A

  When the shielded cable configured in this way is repeatedly bent, there is a possibility that the metal element wire may be disconnected. Therefore, it is necessary to take measures on the embedded device side such as a robot so that the minimum bending radius is specified and the bending radius is less than the minimum bending radius. However, increasing the bending radius of the shielded cable can also lead to an increase in the size of the device, and thus a shielded cable with more excellent bending durability of the laterally wound shield layer has been desired.

  Therefore, according to the present invention, it is possible to increase the bending durability of the laterally wound shield layer as compared to a case where a double shield layer is formed by laterally winding single wires in opposite directions via a buffer layer. Is to provide a simple shielded cable.

In order to solve the above-described problems, the present invention provides an insulated wire portion including at least one insulated wire obtained by applying an insulation coating to a central conductor, and is spirally wound horizontally on the outer peripheral side of the insulated wire portion. A first horizontally wound shield layer made of the first conductive wire, a second horizontally wound shield layer made of the second wire spirally wound on the outer peripheral side of the first horizontally wound shield layer, and A buffer layer made of an insulator disposed between the first horizontal winding shield layer and the second horizontal winding shield layer; and a sheath provided on an outer peripheral side of the second horizontal winding shield layer. And the winding direction of the first conducting wire and the winding direction of the second conducting wire in the circumferential direction of the insulated wire portion are opposite to each other, and at least any of the first conducting wire and the second conducting wire The lead wire is a twisted wire made by twisting multiple strands. Ri, the insulated electric wire portion includes a plurality of insulated wires that are twisted together, wherein in a cross section perpendicular to the central axis of the insulated wire section, the transverse winding of the the twist direction of the plurality of insulated wires first wire A shielded cable in which the winding direction is the same direction, and the twisting direction of the plurality of insulated wires is opposite to the winding direction of the lateral winding of the second conductor .
Further, in order to solve the above-mentioned problems, the present invention provides an insulated wire portion including at least one insulated wire obtained by applying an insulation coating to the center conductor, and a spiral side on the outer peripheral side of the insulated wire portion. A first horizontally-shielded shield layer made of a wound first conducting wire and a second horizontally-wound shield layer made of a second conducting wire spirally wound on the outer peripheral side of the first horizontally-wound shield layer A buffer layer made of an insulator disposed between the first horizontal winding shield layer and the second horizontal winding shield layer, and a sheath provided on the outer peripheral side of the second horizontal winding shield layer And the winding direction of the first conducting wire and the winding direction of the second conducting wire in the circumferential direction of the insulated wire portion are opposite to each other, and of the first conducting wire and the second conducting wire At least one of the conductors is a twisted strand of multiple strands The insulated wire is made of a stranded wire obtained by twisting a plurality of strands, and the cross-section perpendicular to the central axis of the insulated wire portion is twisted with the first strand direction of the plurality of strands of the insulated wire. A shielded cable in which the winding direction of the horizontal winding of the conductive wire is the same direction and the twisting direction of the plurality of strands of the insulated wire and the winding direction of the horizontal winding of the second conductive wire are opposite to each other is provided. .

  According to the shielded cable according to the present invention, the bending resistance of the laterally wound shield layer is improved as compared with the case where a double shield layer is formed by horizontally winding single wires in opposite directions via a buffer layer. It becomes possible to raise.

The shielded cable which concerns on the 1st Embodiment of this invention is shown, (a) is a perspective view, (b) is the sectional view on the AA line of (a). It is explanatory drawing which expands and shows a part of 1st conducting wire wound around the outer periphery of the insulated wire part. It is explanatory drawing which expands and shows a part of 2nd conducting wire wound around the outer periphery of the buffer layer. It is explanatory drawing which shows an example of the horizontal winding process of the 1st horizontal winding shield layer in the manufacturing process of the shielded cable seen from the cross section orthogonal to a central axis. It is explanatory drawing which shows an example of the horizontal winding process of the 2nd horizontal winding shield layer in the manufacturing process of the shielded cable seen from the cross section orthogonal to a central axis. The shielded cable which concerns on the 2nd Embodiment of this invention is shown, (a) is a perspective view, (b) is the BB sectional drawing of (a).

[First Embodiment]
FIG. 1 shows a shielded cable according to a first embodiment of the present invention, and FIG. 1A is a perspective view showing the inner side of a partly removed layer for explanation, FIG. These are the sectional views on the AA line of (a) orthogonal to the central axis of the insulated wire part in a shielded cable.

  This shielded cable 1 includes an insulated wire portion 100 including a plurality (four in this embodiment) of insulated wires 10 and a first conductive wire 20 spirally wound around the outer periphery of the insulated wire portion 100 in a spiral manner. A first horizontal winding shield layer 2, a second horizontal winding shield layer 4 comprising a second conductive wire 40 spirally wound around the outer periphery of the first horizontal winding shield layer 2, and a first horizontal winding shield A buffer layer 3 disposed between the layer 2 and the second horizontal winding shield layer 4 and a sheath 5 provided on the outer periphery of the second horizontal winding shield layer 4 are provided.

  The insulated wire 10 has a central conductor 11 and an insulating layer 12 on the outer periphery thereof, and the central conductor 11 is covered with an insulating layer 12. The center conductor 11 is formed by twisting a plurality of metal strands or a single metal strand. As the metal wire, an annealed copper wire, a silver plated annealed copper wire, a tin plated annealed copper wire, a tin plated copper alloy wire, or the like is used. In the case where the center conductor 11 is formed by twisting a plurality of metal strands, the twist direction of the metal strand of the center conductor 11 in the cross section orthogonal to the center axis C of the insulated wire portion 100 is the first horizontal shield It is the same direction as the winding direction of the first conductor 20 (described later) in the layer 2.

  As the material of the insulating layer 12, various resins such as polyethylene and polypropylene are used. The four insulated wires 10 are twisted and bundled. In addition, you may provide a winding in the outer periphery of each of these insulated wires 10, and the outer periphery of the insulated wire part 100. FIG. The number, diameter, twisted structure, and the like of the insulated wires 10 in the insulated wire portion 100 are appropriately set according to the application.

  The winding direction of the first conducting wire 20 and the winding direction of the second conducting wire 40 in the circumferential direction of the insulated wire portion 100 are opposite to each other. The first conductive wire 20 is formed of a stranded wire obtained by twisting a plurality of strands 200. The second conducting wire 40 is formed of a stranded wire obtained by twisting a plurality of strands 400.

In the present embodiment, the first horizontally wound shield layer 2 is configured by spirally winding a plurality of (12 in the example shown in FIG. 1) first conductive wires 20 spirally. In the present embodiment, it is assumed that a plurality of first conductive wires 20 are wound from the left side to the right side in FIG. The first wire 20 of plural rows in a cross section perpendicular to the central axis C of the insulated wire portion 100 is laterally wound in the arrow A ₁ direction shown in FIG.

Similarly, in the present embodiment, the second horizontally wound shield layer 4 is configured by spirally winding a plurality of (12 in the example shown in FIG. 1) second conductors 40 in a spiral manner. In the present embodiment, it is assumed that the plurality of second conductive wires 40 are wound from the left side of FIG. 1 toward the right side, similarly to the first conductive wire 20. Second wire 40 of plural rows in a cross section perpendicular to the central axis C of the insulated wire portion 100 is laterally wound on (direction opposite to the arrow A ₁ direction) arrow B ₁ direction shown in FIG.

  As the element wire 200 of the first conductor 20 and the element 400 of the second conductor 40, a highly conductive metal element such as an annealed copper wire or tin-plated annealed copper wire is used. The first conducting wire 20 and the second conducting wire 40 are spirally wound horizontally in a state where the strands 200 and 400 are previously twisted together.

  The buffer layer 3 is formed of a tape 30 made of a strip-shaped insulator wound spirally around the outer periphery of the first horizontally wound shield layer 2. The winding direction of the tape 30 is the same as the winding direction of the first conducting wire 20 in the first horizontal shield layer 2, and the tape 30 is spirally wound so that the end portions in the width direction overlap each other. As the tape 30, a paper tape or a resin tape can be used. When the tape 30 is made of a resin, for example, a fluororesin or PET (polyethylene terephthalate) can be applied as the resin material. The buffer layer 3 may be formed by extruding and coating a resin on the outer periphery of the first horizontal shield layer 2.

  The sheath 5 is made of a rubber material such as EPDM (ethylene propylene diene rubber) or a resin such as polyurethane. A buffer layer may be provided between the second horizontally wound shield layer 4 and the sheath 5. As the buffer layer, for example, a paper tape or a resin tape can be used in the same manner as the buffer layer 3 between the first horizontal shield layer 2 and the second horizontal shield layer 4.

FIG. 2 is an explanatory view showing an enlarged part of the first conductive wire 20 wound around the outer periphery of the insulated wire portion 100. In FIG. 2, as a configuration example of the first conductive wire 20, a case where seven strands 200 are twisted is illustrated, but the number of the strands 200 may be plural, for example, 100 or more. There may be. The first conductor 20 is advanced wound toward the lower right from the upper left portion of FIG. 2, a plurality of wires 200 are twisted spirally in an arrow A ₂ direction with respect to the winding direction.

FIG. 3 is an explanatory view showing an enlarged part of the second conducting wire 40 wound around the outer periphery of the buffer layer 3. In FIG. 3, as a configuration example of the second conductor 40, a case where seven strands 400 are twisted is illustrated, but the number of the strands 400 may be plural, for example, 100 or more. There may be. The second wire 40 is advanced wound to the right upper from the lower left portion of FIG. 2, a plurality of wires 400 are twisted spirally in an arrow B ₂ direction with respect to the winding direction.

  FIG. 4 is an explanatory diagram showing an example of the horizontal winding process of the first horizontal winding shield layer 2 in the manufacturing process of the shielded cable 1 as seen from the cross section orthogonal to the central axis C. In the present embodiment, a plurality of (12 items) first conductive wires 20 are simultaneously wound around the outer periphery of the insulated wire portion 100.

  The plurality of first conductive wires 20 are respectively supplied from a plurality of supply portions provided at equal intervals on the outer peripheral portion of the insulated wire portion 100, and the plurality of supply portions and the insulated wire portion 100 are centered on the central axis C. By the relative rotation, the plurality of first conductive wires 20 are spirally wound around the outer periphery of the insulated wire portion 100, and the first horizontally wound shield layer 2 is formed.

When viewed from the cross section shown in FIG. 4, the first and laterally wound winding direction of the conductor 20 (arrow A ₁ direction), twisting direction of the plurality of wires 200 in the first conductor 20 (arrow A ₁ direction) Is the same direction (both counterclockwise).

  FIG. 5 is an explanatory diagram showing an example of the horizontal winding process of the second horizontal winding shield layer 4 in the manufacturing process of the shielded cable 1 as viewed from the cross section orthogonal to the central axis C. In the present embodiment, a plurality of (12 strips) second conductive wires 40 are simultaneously wound around the outer periphery of the buffer layer 3.

  The plurality of second conductive wires 40 are respectively supplied from a plurality of supply portions provided at equal intervals on the outer peripheral portion of the buffer layer 3, and the plurality of supply portions, the insulated wire portion 100, and the first horizontal winding shield layer 2. And the buffer layer 3 rotate relative to each other about the central axis C, whereby a plurality of second conductive wires 40 are spirally wound around the outer periphery of the buffer layer 3 to form a second horizontally wound shield layer 4. Is done.

When viewed from the cross section shown in FIG. 5, the horizontal turn of the winding direction of the second wire 40 (the arrow B ₁ direction), twisting direction of the plurality of wires 400 in the second wire 40 (arrow B ₂ direction) Is the same direction (clockwise direction).

(Operation and effect of the embodiment)
According to the present embodiment, the following operations and effects can be obtained.

(1) Since the first conducting wire 20 is a stranded wire obtained by twisting a plurality of strands 200, the first conducting wire 20 is compared with the case where the first conducting wire 20 is composed of a single wire (single metal strand). The bending durability and the twisting durability of the horizontal winding shield layer 2 of 1 are improved. The reason is considered as follows. That is, when the shielded cable 1 is bent in an arc shape, the first conducting wire 20 receives a tension that is stretched outside the arc and receives a compressive force in a direction in which it is compressed inside the arc. When the first conducting wire 20 is a single wire, the amount of expansion and contraction in the length direction of the first conducting wire 20 is limited, so that the first conducting wire 20 is caused by the tension and compressive force received when the shield cable 1 is bent. Although there is little room for expansion and contraction and disconnection is likely to occur, in the present embodiment, the first conductive wire 20 is formed of a twisted wire. Therefore, the first conductive wire 20 is formed by unraveling or tightening a plurality of strands 200. It is easier to expand and contract in the length direction than when it consists of single wires. Thereby, the expansion and contraction when the shielded cable 1 is bent can be absorbed, and the occurrence of disconnection is suppressed. Similarly, with respect to twisting, shielded cable 1 is first wire 20 expands and contracts when it is twisted in an arrow A ₁ direction and the opposite direction shown in FIG. 1, the occurrence of disconnection is prevented. Further, since the buffer layer 3 is interposed between the first horizontal shield layer 2 and the second horizontal shield layer 4, the shield cable 1 is bent or the shield cable 1 is twisted. In addition, the frictional force applied to the first conductive wire 20 can be suppressed, and the bending durability and the twisting durability of the first laterally wound shield layer 2 can be further improved.

(2) Since the winding direction of the first conducting wire 20 with respect to the insulated wire portion 100 and the twisting direction of the plurality of strands 200 in the extending direction of the first conducting wire 20 are the same direction, the bending durability of the shielded cable 1 In addition, the torsional durability can be further improved. In other words, since the plurality of strands 200 are twisted together, the first conducting wire 20 is gently bent in a natural state where it does not receive external force. Since the direction of the horizontal winding of the first conductive wire 20 is a direction along this curve, the twist of the plurality of strands 200 is distorted when the first horizontal winding shield layer 2 is formed. This can be suppressed, and when the shielded cable 1 is bent or twisted, the stress acting on the first conductor 20 is prevented from being concentrated on a part, and the bending durability and the twisting durability are improved. .

(3) Since the second conducting wire 40 is a stranded wire obtained by twisting a plurality of strands 400, the second conducting wire 40 can be easily expanded and contracted in the length direction as compared with the case where the second conducting wire 40 is made of a single wire. ), The bending durability and the twisting durability of the shielded cable 1 can be further improved.

(4) Since the winding direction of the second conducting wire 40 and the twisting direction of the plurality of strands 400 in the extending direction of the second conducting wire 40 are the same direction, for the same reason as in the above (2), the shielded cable 1 bending durability and twisting durability can be further improved.

(5) Since the winding direction of the first conducting wire 20 and the winding direction of the second conducting wire 40 are opposite to each other, the first and second conducting wires when the insulated wire portion 100 is viewed from the outside of the shielded cable 1. 20 and 40 can be narrowed, noise resistance is improved, and bending of the shielded cable 1 can be suppressed in a natural state where the shielded cable 1 is not subjected to external force. That is, when the winding direction of the first conducting wire 20 and the winding direction of the second conducting wire 40 are the same direction, the bending direction of the shielded cable 1 generated by the first conducting wire 20 and the second conducting wire 40. However, when the winding directions are opposite to each other, the bending of the shielded cable 1 is offset, and as a result, the bending of the shielded cable 1 is suppressed. The Thereby, the arrangement | positioning of the shielded cable 1 becomes easy.

(6) Since the twisting direction of the plurality of insulated wires 10 and the winding direction of the first conducting wire 20 in the insulated wire portion 100 are the same direction, that is, the twisting direction of the plurality of insulated wires 10 and the winding of the second conducting wire 40. Since the direction is opposite, the bending of the shielded cable 1 in a natural state where the shielded cable 1 is not subjected to external force can be further suppressed. That is, since the 2nd conducting wire 40 is arranged on the outer peripheral side rather than the 1st conducting wire 20, the effect | action which curves the shield cable 1 becomes stronger than the 1st conducting wire 20, By making the twist direction opposite to the winding direction of the second conductor 40, the action of the first conductor 20 bending the shield cable 1 and the action of the plurality of insulated wires 10 bending the shield cable 1 are combined. Thus, the second conducting wire 40 cancels out the action of bending the shielded cable 1, and the bending of the shielded cable 1 can be suppressed.

(7) Since the buffer layer 3 is made of the tape 30 spirally wound in the opposite direction to the first horizontal shield layer 2, the winding direction is the same as that of the first horizontal shield layer 2. The bending of the shielded cable 1 can be suppressed more than the case.

[Second Embodiment]
FIG. 6 shows a shielded cable 1A according to a second embodiment of the present invention, and FIG. 6A is a perspective view showing the inner side of a partly removed layer for explanation. ) Is a cross-sectional view taken along line BB of (a) orthogonal to the central axis of the insulated wire portion 100A in the shielded cable 1A.

  In the first embodiment, the insulated wire portion 100 of the shielded cable 1 is configured by the four insulated wires 10. However, the shielded cable 1A according to the present embodiment is insulated by the single insulated wire 10A. Part 100A is configured. Other configurations are the same as those of the shielded cable 1. In FIG. 6, members having the same functions as those described in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

The insulated wire 10A has a central conductor 11A and an insulating layer 12A, and the central conductor 11A is covered with an insulating layer 12A. The center conductor 11A is a stranded wire obtained by twisting together strands 110 made of a plurality of highly conductive metals. In a cross section perpendicular to the central axis C of the insulated wire portion 100, are at the same direction (arrow A ₁ direction) and the transverse winding of the winding direction of the twisting direction and the first conductor 20 of the plurality of strands 110 of insulated wire 10A . That is, the twisting direction of the plurality of strands 110 and the winding direction of the horizontal winding of the first conducting wire 20 are opposite to each other.

(Operation and effect of the second embodiment)
Also according to the present embodiment, the same operations and effects as the operations (1) to (5) and (7) described in the first embodiment can be obtained. Moreover, since the twist direction of the some strand 110 of the insulated wire 10A and the winding direction of the horizontal winding of the 1st conducting wire 20 are the same direction, the shield cable 1A bends in the natural state in which the shield cable 1 does not receive external force. Can be suppressed. That is, since the 2nd conducting wire 40 is arrange | positioned in the outer peripheral side rather than the 1st conducting wire 20, the effect | action which curves the shield cable 1A rather than the 1st conducting wire 20 becomes strong, but the some of insulated wire 10A By making the twisting direction of the strand 110 opposite to the winding direction of the second conducting wire 40, the first conducting wire 20 bends the shielded cable 1A and the plural strands 110 bend the shielded cable 1A. In combination, the second conductive wire 40 cancels the action of bending the shielded cable 1A, and the bending of the shielded cable 1A can be suppressed.

  Hereinafter, Example 1 will be described as a more specific embodiment of the present invention, and the results of the bending durability test and the twisting durability test of the shielded cable according to Example 1 will be described by comparison with Comparative Examples 1-3. In addition, in Example 1, the typical example of the said embodiment is given and, of course, this invention is not limited to this Example.

Example 1
The shielded cable according to the first embodiment (hereinafter, this shielded cable is referred to as “first shielded cable”) is configured similarly to the shielded cable 1A shown in FIG. That is, in the first shielded cable, the first conductive wire 20 and the second conductive wire 40 are stranded wires, and the buffer layer 3 is interposed between the first horizontal shield layer 2 and the second horizontal shield layer 4. Is intervening. The outer diameter of the first conducting wire 20 and the second conducting wire 40 is 0.1 mm, and the number of the strands 200 in the first conducting wire 20 and the number of the strands 400 in the second conducting wire 40 are 100 respectively. did. Further, the cross-sectional area of each central conductor 11A of the insulated wire 10A is 3 mm ² , and a fluororesin is used as the material of the tape 30.

(Comparative Example 1)
The shielded cable according to Comparative Example 1 (hereinafter, this shielded cable is referred to as “second shielded cable”) is obtained by omitting the buffer layer 3 in the first shielded cable, and the second laterally wound shield layer 4 is It is provided on the outer periphery of the first horizontal shield layer 2. Other configurations and materials are the same as those of the first shielded cable.

(Comparative Example 2)
In the shielded cable according to Comparative Example 2 (hereinafter, this shielded cable is referred to as “third shielded cable”), the first conducting wire 20 and the second conducting wire 40 in the first shielded cable are not twisted wires but have an outer diameter. Is a 0.1 mm single wire (one metal strand). Other configurations and materials are the same as those of the first shielded cable.

(Comparative Example 3)
The shielded cable according to Comparative Example 3 (hereinafter, this shielded cable is referred to as “fourth shielded cable”) is obtained by omitting the buffer layer 3 in the third shielded cable. It is provided on the outer periphery of the first horizontal shield layer 2. Other configurations and materials are the same as those of the third shielded cable.

(Test method)
A bending durability test and a torsional durability test were performed using the first to fourth shielded cables according to Example 1 and Comparative Examples 1 to 3. The number of samples of the 1st thru | or 4th shielded cable was 5 each.

  In the bending endurance test, the bending radius was set to 30 mm, the bending angle was set to 90 degrees, and the number of bending until the disconnection rate of the first conducting wire 20 and the second conducting wire 40 reached 10% or more was recorded.

  In the torsional durability test, one end of each of the 100 mm first to fourth shielded cables is fixed and the other end is connected to a rotating mechanism, and the other end is twisted at 90 degrees with respect to one end. Was repeated, and the number of bendings until the disconnection rate of the first conductor 20 and the second conductor 40 became 10% or more was recorded.

  Here, in the first and second shielded cables, the disconnection rate of 10% or more means that 10% or more of the strand 200 of the first conductor 20 and the strand 400 of the second conductor 40 are 10% or more. , 400 is disconnected. Further, in the third and fourth shielded cables, the disconnection rate of 10% or more means that 10% or more of the first conductor 20 and the second conductor out of the plurality of first conductors 20 and second conductors 40. The case where the conducting wire 40 is disconnected. The disconnection rate was measured every 100,000 times, and the number of repetitions of bending or twisting at the last measurement when the disconnection rate was less than 10% was used as the experimental result. For example, when the number of repetitions is 300,000, the disconnection rate is less than 10%. When the number of repetitions is 400,000, the disconnection rate is 10% or more. " In addition, when the disconnection rate was less than 10% even after repeated 1.1 million times, the experimental result was set to “1 million times or more”. The experimental results are shown in Table 1.

  As is apparent from the experimental results, bending durability and twisting durability are improved by using the first conducting wire 20 and the second conducting wire 40 as stranded wires. Further, by providing the buffer layer 3, the bending durability and the twisting durability are further improved.

  While the embodiments of the present invention have been described above, the embodiments described above do not limit the invention according to the claims. In addition, it should be noted that not all the combinations of features described in the embodiments are essential to the means for solving the problems of the invention.

  In addition, the present invention can be implemented with appropriate modifications without departing from the spirit of the present invention. For example, in the first and second embodiments described above, the case where both the first conductive wire 20 and the second conductive wire 40 are made of twisted wires has been described. Any of the first conductive wire 20 and the second conductive wire 40 is described. Either of them may be a single wire made of a single metal wire.

(Summary of embodiment)
Next, the technical idea grasped from the embodiment described above will be described with reference to the reference numerals in the embodiment. However, each reference numeral in the following description does not limit the constituent elements in the claims to members or the like specifically shown in the embodiment.

[1] An insulated wire portion (100, 100A) including at least one insulated wire (10, 10A) formed by applying an insulation coating to the central conductor (11, 11A), and the insulated wire portion (100, 100A) A first laterally shielded layer (2) composed of a first conductor (20) spirally wound laterally on the outer peripheral side, and laterally spirally on the outer peripheral side of the first laterally shielded layer (2). It arrange | positions between the 2nd horizontal winding shield layer (4) which consists of the wound 2nd conducting wire (40), and a 1st horizontal winding shield layer (2) and a 2nd horizontal winding shield layer (4). A buffer layer (3) made of an insulating material, and a sheath (5) provided on the outer peripheral side of the second laterally wound shield layer (4), and the periphery of the insulated wire portion (100, 100A) Winding direction of the first conducting wire (20) in the direction and winding of the second conducting wire (40) The direction is opposite to each other, and at least one of the first conductor (20) and the second conductor (40) is a stranded wire in which a plurality of strands (200, 400) are twisted together A shielded cable (1, 1A).

[2] The first conductive wire (20) is formed of a stranded wire obtained by twisting a plurality of strands, and the first conductive wire (20) has a cross section perpendicular to the central axis (C) of the insulated wire portion (100, 100A). When the horizontal winding shield layer (2) is viewed, the horizontal winding direction of the first conductive wire (20) and the twisting direction of the plurality of strands (200) in the first conductive wire (20) are determined. The shielded cable (1, 1A) according to [1], which is in the same direction.

[3] The second conductive wire (40) is formed of a stranded wire obtained by twisting a plurality of strands (400), and in a cross section orthogonal to the central axis (C) of the insulated wire portion (100, 100A). When the second horizontal winding shield layer (4) is viewed, the horizontal winding direction of the second conducting wire (40) and the twist of the plurality of strands (400) in the second conducting wire (40) The shielded cable according to [1] or [2], wherein the direction is the same direction.

[4] The insulated wire portion (100) includes a plurality of insulated wires (10) twisted together, and the plurality of insulated wires in a cross section orthogonal to the central axis (C) of the insulated wire portion (100). The shielded cable (1, 1A) according to any one of [1] to [3], wherein the twisting direction of the electric wire (10) and the winding direction of the lateral winding of the first conductive wire (20) are the same direction. ).

[5] The insulated wire (10A) is formed of a twisted wire obtained by twisting a plurality of strands (110), and the insulated wire (10A) has a cross section perpendicular to the central axis (C) of the insulated wire portion (100A). The twisting direction of the plurality of strands (110) of 10A) and the winding direction of the lateral winding of the first conducting wire (20) are the same direction, according to any one of [1] to [4]. Shielded cable (1, 1A).

[6] The buffer layer (3) is formed by spirally winding a strip-shaped tape (30) made of an insulator around the outer circumference of the first horizontal shield layer (2), and the insulated wire portion (100, 100A) when the first horizontal winding shield layer (2) and the buffer layer (3) are viewed in a cross section perpendicular to the central axis (C), the horizontal winding of the first conductive wire (20) The shield cable (1, 1A) according to any one of [1] to [5], wherein the direction and the winding direction of the buffer layer (3) are the same.

DESCRIPTION OF SYMBOLS 1,1A ... Shielded cable, 2 ... 1st horizontal winding shield layer, 3 ... Buffer layer, 4 ... 2nd horizontal winding shield layer, 5 ... Sheath 10, 10A ... Insulated wire, 11, 11A ... Center conductor, DESCRIPTION OF SYMBOLS 12,12A ... Insulating layer, 20 ... 1st conducting wire, 40 ... 2nd conducting wire, 30 ... Tape, 100, 100A ... Insulated electric wire part, 110, 200, 400 ... Strand, C ... Central axis

Claims (5)

An insulated wire portion including at least one insulated wire obtained by applying an insulating coating to the central conductor;
A first horizontally wound shield layer comprising a first conductive wire spirally wound horizontally on the outer peripheral side of the insulated wire portion;
A second laterally wound shield layer comprising a second conductive wire spirally wound laterally on the outer peripheral side of the first laterally wound shield layer;
A buffer layer made of an insulator disposed between the first horizontal winding shield layer and the second horizontal winding shield layer;
A sheath provided on the outer peripheral side of the second horizontally wound shield layer,
The winding direction of the first conducting wire and the winding direction of the second conducting wire in the circumferential direction of the insulated wire portion are opposite to each other;
At least one of the conductors of the first conductor and the second conductor, Ri Do from stranded wire formed by stranding a plurality of strands,
The insulated wire portion includes a plurality of insulated wires twisted together,
In the cross section orthogonal to the central axis of the insulated wire portion, the twist direction of the plurality of insulated wires and the winding direction of the lateral winding of the first conductor are the same direction, and the twist direction of the plurality of insulated wires and the A shielded cable in which the winding direction of the horizontal winding of the second conducting wire is opposite . An insulated wire portion including at least one insulated wire obtained by applying an insulating coating to the central conductor;
A first horizontally wound shield layer comprising a first conductive wire spirally wound horizontally on the outer peripheral side of the insulated wire portion;
A second laterally wound shield layer comprising a second conductive wire spirally wound laterally on the outer peripheral side of the first laterally wound shield layer;
A buffer layer made of an insulator disposed between the first horizontal winding shield layer and the second horizontal winding shield layer;
A sheath provided on the outer peripheral side of the second horizontally wound shield layer,
The winding direction of the first conducting wire and the winding direction of the second conducting wire in the circumferential direction of the insulated wire portion are opposite to each other;
At least one of the first conductive wire and the second conductive wire is a twisted wire obtained by twisting a plurality of strands,
The insulated wire is composed of a twisted wire obtained by twisting a plurality of strands,
In the cross section orthogonal to the central axis of the insulated wire portion, the twist direction of the plurality of strands of the insulated wire and the winding direction of the lateral winding of the first conducting wire are the same direction, and the plurality of the insulated wires A shielded cable in which the twisting direction of the strand of wire and the winding direction of the horizontal winding of the second conducting wire are opposite to each other . The first conductive wire is a twisted wire obtained by twisting a plurality of strands,
When the first horizontal winding shield layer is viewed in a cross section perpendicular to the central axis of the insulated wire portion, the winding direction of the horizontal winding of the first conductive wire and the plurality of strands of the first conductive wire The twist direction is the same direction,
The shielded cable according to claim 1 or 2 . The second conductive wire is a twisted wire obtained by twisting a plurality of strands,
When the second horizontal winding shield layer is viewed in a cross section orthogonal to the central axis of the insulated wire portion, the winding direction of the horizontal winding of the second conductive wire and the plurality of strands of the second conductive wire The twist direction is the same direction,
The shielded cable according to any one of claims 1 to 3 . The buffer layer is formed by spirally winding a strip-shaped tape made of an insulator around the outer periphery of the first horizontal shield layer,
When the first horizontal winding shield layer and the buffer layer are viewed in a cross section orthogonal to the central axis of the insulated wire portion, the horizontal winding direction of the first conductive wire, and the winding direction of the buffer layer Are in the same direction,
The shielded cable according to any one of claims 1 to 4 .

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