WO2011161533A1 - Wiring duct, wiring duct system, and electric device connected to the wiring duct - Google Patents

Abstract

Provided is a wiring duct which is equipped internally with electricity supply wiring and communication wiring, and which can supply electricity to an electrical device at any desired position on a wiring pathway of the electricity supply wiring, wherein spacing is provided between the electricity supply wiring and communication wiring to suppress induction noise that occurs in the communication wiring and is caused by the electrical supply wiring.

Description

Wiring duct, wiring duct system, and electrical equipment connected to the wiring duct

The present invention relates to a wiring duct that is installed along a wall surface or a ceiling surface and to which a wiring device is attached from a desired position, and a wiring duct system including the wiring duct. Moreover, it is related with the electric equipment connected with the wiring duct.

Since the degree of freedom of installation of electrical equipment installed in the room is higher than the outlet, wiring ducts that can supply power from any position in the wiring path are widely used in stores, factory offices, and the like.
In recent years, in addition to power wiring, it has become necessary to install communication wiring such as control communication cables and LAN cables indoors, and such communication wiring has the same structure as the wiring duct. Or is desired.
Therefore, a wiring duct provided with a power supply wiring and a communication wiring in one wiring duct is proposed (for example, Patent Document 1).
As shown in FIG. 13, the wiring duct used for the wiring duct has a substantially rectangular tube-like appearance having a communication hole 117 opened along the longitudinal direction at the bottom 115 which is one side surface. The opposite side surface of the bottom portion 115 is a fixed portion 114 fixed to a ceiling or the like, and the portion connecting the fixed portion 114 and the bottom portion 115 is a connecting portion 116. From the inner peripheral surface of the connecting portion 116, a flange 118A is extended from the outside to the inside in the short side direction, and the inner end of the flange 118A has a length for supplying commercial power. A length of power supply wiring 113A is arranged along the longitudinal direction. Therefore, when an apparatus is electrically connected to the wiring duct, an electrical contact of the connected apparatus is inserted into the duct body through the communication hole 117 and connected to the power supply wiring 113A.
Similarly, long communication wires 113B for feeding communication signals are arranged along the longitudinal direction. Accordingly, when a communication device is connected to the wiring duct, the communication contact of the connected device is inserted into the duct body through the communication hole 117 and connected to the communication wire 113B.
The electrical equipment and communication equipment connected to the wiring duct are connected via a power outlet plug 130 as shown in FIG. 14, for example. On one surface of the power outlet plug 130 having a substantially rectangular parallelepiped shape, a cylindrical rotating body 126 inserted into the inside of the wiring duct through the communication hole 117 of the wiring duct is rotatably provided. A power outlet 121 for power supply and a communication outlet 123 (for example, a LAN cable outlet) are provided on a surface opposite to the surface on which the rotating body 126 is provided, and a knob 127 for rotating the rotating body 126. Is arranged. The peripheral surface of the rotating body 126 communicates with a pair of power supply blades 128 as electrical contacts at symmetrical positions with the central portion of the rotating body 126 interposed therebetween, and with symmetrical positions with the central portion of the rotating body 126 interposed therebetween. A pair of communication plug blades 129 which are contact points for wires and a locking blade 122 for locking the power outlet plug 130 to the wiring duct are projected. In accordance with the rotation operation of the knob 127, the power plug blade 128, the communication plug blade 129, and the locking blade 122 are arranged in a direction substantially parallel to the longitudinal direction of the wiring duct, and the short direction of the wiring duct is substantially the same. It is possible to select the state of being aligned in parallel directions.
When attaching the power outlet plug 130, first, the rotating body 126 is set such that the long sides of the power plug blade 128, the communication plug blade 129, and the locking blade 122 are substantially parallel to the longitudinal direction of the wiring duct. Is inserted into the wiring duct. In this case, since the lengths of the short sides of the power plug blade 128, the communication plug blade 129, and the locking blade 122 are smaller than the width of the communication hole 117 of the wiring duct, they can be inserted up to the locking blade 122. The rotating body 126 is rotated 90 degrees in the direction of the arrow using the knob 127 with the locking blades 122 inserted inside the receiving portions on both sides of the communication hole 117 of the wiring duct. As a result, as shown in FIG. 15, the power outlet plug 130 is supported on the bottom 115 of the wiring duct by the locking blade 122, and the power plug blade 128 and the communication plug blade 129 are respectively connected to the power supply wiring 113A. And it contacts with the wiring 113B for communication, and is electrically connected.
The electrical equipment connected to the wiring duct is supplied with power when connected via the power outlet 121, and the communication equipment is supplied with communication signals when connected via the communication outlet 123. Accordingly, a personal computer or the like which is a communicable electric device can receive both power and a communication signal from one place, so that it can be made a clean wiring. In addition, if an electric device or a communication device is specially designed, it is possible to receive power supply, communication signal supply or both without going through the power outlet plug 130 by directly connecting to the wiring duct.
Patent Document 1 discloses a wiring duct provided with two electrode pairs constituted by two conductors for power supply and one electrode pair constituted by two conductors (signal conductors) for signal transmission. Is disclosed.
Furthermore, since the wiring duct is installed with the ceiling surface or wall surface as the installation surface, it is desirable that the wiring duct is excellent in aesthetics. In order to improve the aesthetic appearance, it is effective to reduce the size of the wiring duct.
US Pat. No. 6,274,817

However, since the communication duct and the power supply wiring are arranged in the wiring duct in the above wiring duct, noise caused by the induction magnetic field generated from the power supply wiring is generated in the communication wiring, and communication There is a concern that the quality will deteriorate.
In addition, when one electrode pair is configured as a signal transmission conductor as described above, it is necessary to suppress the occurrence of electrical interference between the conductors.
The present invention has been made in view of such circumstances, and is a wiring duct having a power supply wiring and a communication wiring, and noise caused by an induced magnetic field generated from the power supply wiring is generated in the communication wiring. It is an object of the present invention to provide an improved wiring duct that can suppress this.
Another object of the present invention is to provide a wiring duct and a wiring duct system that can be reduced in size and can suppress electromagnetic interference in a plurality of electrode pairs.
Furthermore, the objective of this invention is providing the electrical equipment for the wiring duct which can be reduced in size in the direction parallel to an installation surface, and the wiring duct.
The wiring duct according to the present invention is a wiring duct in which a power supply wiring and a communication wiring are arranged, and can supply power to an electrical device at an arbitrary position on the wiring system of the power supply wiring. In addition, an interval for suppressing inductive noise caused by the power supply wiring from being generated in the communication wiring is provided between the power supply wiring and the communication wiring. To do.
According to the above configuration, since an interval for suppressing inductive noise caused by the power supply wiring from being generated in the communication wiring is provided between the power supply wiring and the communication wiring, Generation of noise in the communication wiring due to the induction magnetic field generated from the wiring can be suppressed.
It should be noted that the interval for suppressing the generation of inductive noise in the communication wiring can be determined purposefully. For example, if the power wiring is a 100-volt AC wiring that is normally used, a near-end attenuation equivalent to the average crosstalk attenuation of the many-to-subscriber line can be secured by setting the interval to 5 cm or more.
In the wiring duct according to the present invention, it is preferable that a blocking wall having an effect of blocking electromagnetic waves is further provided between the power supply wiring and the communication wiring.
According to the above configuration, since the shielding wall having an effect of shielding electromagnetic waves is further provided between the power supply wiring and the communication wiring, the above-mentioned distance is set as compared with the case where the shielding wall is not provided. Even if it is made smaller, it is possible to equally suppress the generation of noise in the communication wiring. Therefore, the size of the entire wiring duct can be reduced, which contributes to space saving and cost reduction.
In the wiring duct according to the present invention, it is preferable that a plurality of the communication wirings are arranged, and the plurality of communication wirings are twisted together.
According to the above configuration, since the plurality of communication wires are twisted together, it is possible to suppress noise generated from the communication wires. Therefore, noise can be further suppressed from occurring in the communication wiring.
In the wiring duct according to the present invention, it is preferable that at least one of the power supply wiring and the communication wiring is surrounded by an electromagnetic wave blocking member having an effect of blocking electromagnetic waves.
According to the above configuration, since at least one of the power supply wiring and the communication wiring is surrounded by the electromagnetic wave shielding member having an effect of blocking electromagnetic waves, inductive noise caused by the power supply wiring is generated in the communication wiring. This can be further suppressed. Therefore, it is possible to further reduce the interval in order to obtain an equivalent suppression effect.
In the wiring duct according to the present invention, the electromagnetic wave shielding member is preferably grounded. Since the electromagnetic shielding member is grounded, the effect of shielding the induced magnetic field is further increased, so that it is possible to further suppress the occurrence of induction noise caused by the power supply wiring in the communication wiring. Therefore, in order to obtain the same suppression effect, the interval can be further reduced.
In order to solve the above problems, a wiring duct according to a first invention includes a core made of a metal material and a plurality of electrode pairs provided inside the core, and each of the electrode pairs is constituted by two conductors. A plurality of the electrode pairs provided at intervals in a predetermined direction, and the two conductors constituting one electrode pair are spaced from each other in a direction perpendicular to the predetermined direction. A barrier wall made of a metal material and extending in a direction perpendicular to the predetermined direction is provided between the plurality of electrode pairs.
In the wiring duct, it is preferable that the blocking wall is formed integrally with the core.
In the wiring duct, the blocking wall may be joined to the core, and the blocking wall may be integrally formed with the core.
In the wiring duct, the core is divided by the blocking wall and has a plurality of internal spaces in which the electrode pairs are provided, and the core is provided with a plurality of openings that open the internal space. Preferably, the plurality of openings are opened in different directions.
In the wiring duct, it is preferable that the plurality of openings are opened in different directions by forming the core so that the cross-sectional shape is line-symmetric in the predetermined direction.
In the wiring duct, the core is preferably made of a nonmagnetic metal material.
In the wiring duct, it is preferable that the core and the blocking wall are made of a nonmagnetic metal material.
In the wiring duct, it is preferable that the capacitances of the two conductors constituting one electrode pair are equal to each other.
In order to solve the above problems, a wiring duct according to a second invention comprises a core made of a metal material and a plurality of electrode pairs provided inside the core, and each of the electrode pairs is constituted by two conductors. A plurality of the electrode pairs provided at intervals in a predetermined direction, and the two conductors constituting one electrode pair are spaced from each other in a direction perpendicular to the predetermined direction. The capacitances of the two conductors provided and constituting one electrode pair are equal to each other.
In the wiring duct, the core is provided with an opening that opens an internal space in which the electrode pair is provided, and the core bisects the opening in a cross section perpendicular to the longitudinal direction of the core. The two conductors forming one electrode pair are symmetrical with respect to the center line in the cross section perpendicular to the longitudinal direction of the core. It is preferable to be disposed at a position.
The wiring duct system of the present invention is a wiring duct system comprising a plurality of the above wiring ducts, wherein a signal transmission path is formed by connecting the electrode pairs included in each of the wiring ducts to each other, wherein the signal transmission path Has a structure for reversing the direction of magnetic flux generated when a current flows through the electrode pair forming the signal transmission path.
The wiring duct system preferably includes a wiring duct connecting member that connects the plurality of wiring ducts to each other, and the direction of the magnetic flux is reversed by the wiring duct connecting member.
The wiring duct of the present invention includes a plurality of conductors including at least a power conductor and a housing having the conductors therein, and an installation surface that is one of the outer peripheral surfaces of the housing is installed on the installation surface. In a wiring duct capable of supplying electric power to an electrical device at an arbitrary position on the power lead system, all of the plurality of lead wires are arranged in a direction perpendicular to the installation surface. Features.
In this wiring duct, it is preferable that at least one of the plurality of conductors includes a communication conductor.
In this wiring duct, it is preferable that a shielding wall having an effect of shielding electromagnetic waves is further provided between the power conducting wire and the communication conducting wire.
The electrical device of the present invention is an electrical device that includes a contact point connected to the connected surface of the conductor and is connected to the wiring duct of the present invention, wherein the contact point is parallel to the installation surface with respect to the electrical device body. The contact point is connected to the connected surface by linearly moving in any direction.
According to the present invention, there is provided a wiring duct including a power supply wiring and a communication wiring, and noise generated due to an induction magnetic field generated from the power supply wiring is suppressed from being generated in the communication wiring. A wiring duct that can be provided can be provided.
Further, according to the present invention, the wiring duct can be reduced in size, and electromagnetic interference in a plurality of electrode pairs can be suppressed.
Moreover, according to this invention, the electrical equipment for the wiring duct which can be reduced in size in the direction parallel to an installation surface, and the said wiring duct can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is drawing explaining one Embodiment of the wiring duct concerning this invention, Comprising: (a) is sectional drawing of a wiring duct, (b) is a side view of a wiring duct, (c) is a bottom face of a wiring duct. It is a figure and (d) is a perspective view of a wiring duct. It is drawing explaining 2nd Embodiment of the wiring duct concerning this invention, Comprising: It is sectional drawing of a wiring duct. It is drawing explaining 3rd Embodiment of the wiring duct concerning this invention, Comprising: It is sectional drawing of a wiring duct. It is drawing explaining 4th Embodiment of the wiring duct concerning this invention, (a) is sectional drawing of a wiring duct, (b) is a side view of a wiring duct. It is drawing explaining the modification of 1st Embodiment of the wiring duct concerning this invention, Comprising: It is sectional drawing of a wiring duct. It is drawing explaining the modification of 1st Embodiment of the wiring duct concerning this invention, Comprising: It is sectional drawing of a wiring duct. It is drawing explaining the modification of 1st Embodiment of the wiring duct concerning this invention, Comprising: It is sectional drawing of a wiring duct. It is drawing explaining the modification of 1st Embodiment of the wiring duct concerning this invention, Comprising: It is sectional drawing of a wiring duct. It is drawing explaining the modification of 2nd Embodiment of the wiring duct concerning this invention, Comprising: It is sectional drawing of a wiring duct. It is drawing explaining the modification of 2nd Embodiment of the wiring duct concerning this invention, Comprising: It is sectional drawing of a wiring duct. It is drawing explaining the modification of 3rd Embodiment of the wiring duct concerning this invention, Comprising: It is sectional drawing of a wiring duct. It is drawing explaining the modification of 3rd Embodiment of the wiring duct concerning this invention, Comprising: It is sectional drawing of a wiring duct. It is drawing explaining one Embodiment of the conventional wiring duct, Comprising: (a) is sectional drawing of a wiring duct, (b) is a side view of a wiring duct, (c) is a bottom view of a wiring duct. is there. It is drawing explaining one Embodiment of the conventional wiring duct, Comprising: It is a perspective view of the power outlet plug which can be attached to a wiring duct. It is drawing explaining one Embodiment of the conventional wiring duct, Comprising: It is a perspective view which shows the state which attached the power outlet plug to the wiring duct. The perspective view which shows the wiring duct which concerns on the 5th Embodiment of this invention. Sectional drawing which shows the cross section perpendicular | vertical to the longitudinal direction of the wiring duct which concerns on the embodiment. The perspective view which shows the wiring duct which concerns on the 6th Embodiment of this invention. Sectional drawing which shows the cross section perpendicular | vertical to the longitudinal direction of the wiring duct which concerns on the embodiment. Sectional drawing which shows the cross section perpendicular | vertical to a longitudinal direction of the wiring duct which concerns on the 7th Embodiment of this invention. The perspective view which shows the wiring duct system which concerns on the 8th Embodiment of this invention, and the connection member for wiring ducts which connects several wiring ducts. It is a block diagram of the wiring duct system which concerns on the embodiment, Comprising: The figure which shows direction of the magnetic flux which generate | occur | produces when an electric current flows into an electrode pair. Sectional drawing which shows the modification of the wiring duct which concerns on this invention. Sectional drawing which shows the modification of the wiring duct which concerns on this invention. Sectional drawing which shows the modification of the wiring duct which concerns on this invention. Sectional drawing which shows the modification of the wiring duct which concerns on this invention. Sectional drawing which shows the modification of the wiring duct which concerns on this invention. Sectional drawing which shows the modification of the wiring duct which concerns on this invention. Sectional drawing which shows the modification of the wiring duct which concerns on this invention. About the wiring duct of 9th Embodiment of this invention, (a) is sectional drawing, (b) is a side view, (c) is a bottom view, (d) is a perspective view. About the connection plug used for the wiring duct of the embodiment, (a) a perspective view from the non-conductive wire side, (b) is a perspective view from the conductive wire side. About the connection plug used for the wiring duct of the embodiment, (a) is an exploded perspective view, (b) and (c) are sectional views. Sectional drawing which shows the state connected to the wiring duct about the connection plug used for the wiring duct of the embodiment. Sectional drawing of a wiring duct about the wiring duct of 10th Embodiment of this invention. Sectional drawing of a wiring duct about the wiring duct of other embodiment of this invention.

(First embodiment)
An embodiment of a wiring duct embodying the present invention will be described below with reference to FIG. Since the basic structure and method of use of the wiring duct are the same as in the prior art, the description thereof will be omitted and only the improved part will be described in detail.
As shown in FIGS. 1 (a) to 1 (d), the wiring duct has a substantially rectangular tube-like appearance having a communication hole 17 opened along the longitudinal direction at the bottom 15 which is one side surface. The opposite side surface of the bottom portion 15 is a fixed portion 14 that is fixed to a ceiling or the like, and a portion that connects the fixed portion 14 and the bottom portion 15 is a connecting portion 16. A flange 18A is extended from one side of the inner peripheral surface of the connecting portion 16 from the outside to the inside in the short direction, and commercial power is supplied to the inner end of the flange 18A. For this purpose, a long power supply wiring 13A is arranged along the longitudinal direction. Therefore, when an apparatus is electrically connected to the wiring duct, an electrical contact of the connected apparatus is inserted into the duct body through the communication hole 17 and connected to the power supply wiring 13A.
Similarly, a flange 18B extends from the other side of the inner peripheral surface of the connecting portion 16 from the outside to the inside in the short direction, and a communication is provided at the inner end of the flange 18B. A long communication wire 13B for supplying a signal is arranged along the longitudinal direction. Accordingly, when a communication device is connected to the wiring duct, the communication contact of the connected device is inserted into the duct body through the communication hole 17 and connected to the communication wire 13B.
Here, the shortest distance between the power supply wiring 13A and the communication wiring 13B is 6 cm. In other words, a feature is that a gap d of 6 cm is provided between the power supply wiring 13A and the communication wiring 13B. By providing this distance d, it is possible to suppress the occurrence of inductive noise caused by the power supply wiring 13A in the communication wiring 13B.
The size of the interval d can be arbitrarily determined within a range in which induction noise caused by the power supply wiring 13A can be suppressed from occurring in the communication wiring 13B. Therefore, it is appropriately determined depending on the magnitude of the voltage applied to the power supply wiring 13A and the quality required for the communication wiring 13B. For example, when 100V AC used for ordinary household power is used as power, an average of 52 dB or more at a signal frequency of 1 MHz, which is equivalent to the average crosstalk attenuation of many-to-subscriber lines, by setting the interval d to 5 cm or more. Can be secured (2002 IEICE General Conference Paper B-8-32 “Crosstalk Attenuation from Power Line Cable to Home Communication Line”). If the distance d is 10 cm or more, the crosstalk attenuation is about 50 dB (same as above). Therefore, the size of the distance d is preferably 5 cm or more, and more preferably 10 cm or more.
According to the wiring duct of the above embodiment, the following effects can be obtained.
(1) According to the wiring duct, the interval d for suppressing the induction noise caused by the power supply wiring 13A from occurring in the communication wiring 13B is equal to the distance d between the power supply wiring 13A and the communication wiring 13B. Since it is provided in between, it is possible to suppress the occurrence of noise in the communication wiring 13B due to the induced magnetic field generated from the power supply wiring 13A.
(Second Embodiment)
A second embodiment of a wiring duct embodying the present invention will be described below with reference to FIG. In addition, since the basic structure and usage method of a wiring duct are the same as that of the past and 1st Embodiment, the description is abbreviate | omitted and only a characteristic part is explained in full detail.
As shown in FIG. 2, the wiring duct has a substantially rectangular tube-like appearance having a communication hole 17 opened along the longitudinal direction at the bottom 15 which is one side surface. The opposite side surface of the bottom portion 15 is a fixed portion 14 that is fixed to a ceiling or the like, and a portion that connects the fixed portion 14 and the bottom portion 15 is a connecting portion 16. A blocking wall 19 extends from the center of the inner peripheral surface of the fixed portion 14 toward the bottom side from the fixed portion side. The blocking wall 19 is formed by covering a metallic core material 21 with a resin, and has an effect of blocking electromagnetic waves. Although not shown in particular, since the blocking wall 19 is grounded, the effect of shielding the induced magnetic field is further increased. Therefore, the induction noise caused by the power supply wiring 13A can be further suppressed from occurring in the communication wiring 13B.
A flange 18 </ b> A extends from one surface across the blocking wall 19 on the inner peripheral surface of the fixed portion 14 from the fixed portion side toward the bottom side. A long power supply wiring 13A for supplying commercial power is disposed along the longitudinal direction at the inner end of the flange 18A. Therefore, when an apparatus is electrically connected to the wiring duct, an electrical contact of the connected apparatus is inserted into the duct body through the communication hole 17 and connected to the power supply wiring 13A.
A flange 18B extends from the other side of the inner wall surface of the fixed portion 14 across the blocking wall 19 from the fixed portion side toward the bottom side. A long communication wire 13B for supplying a communication signal is disposed along the longitudinal direction at the inner end of the flange 18B. Accordingly, when a communication device is connected to the wiring duct, the communication contact of the connected device is inserted into the duct body through the communication hole 17 and connected to the communication wire 13B.
Here, the shortest distance between the power supply wiring 13A and the communication wiring 13B is 4 cm. In other words, a gap d of 4 cm is provided between the power supply wiring 13A and the communication wiring 13B. By providing this distance d, it is possible to suppress the occurrence of inductive noise caused by the power supply wiring 13A in the communication wiring 13B.
The size of the interval d can be arbitrarily determined as long as induction noise caused by the power supply wiring 13A can be suppressed from occurring in the communication wiring 13B. Therefore, it is appropriately determined depending on the magnitude of the voltage applied to the power supply wiring 13A and the quality required for the communication wiring 13B. As described above, when 100V alternating current used for ordinary household power is used as power without the blocking wall 19, by setting the interval d to 5 cm or more, the average crosstalk attenuation of the many-to-subscriber line can be reduced. An equivalent near-end attenuation of 52 dB or more can be secured at an equivalent signal frequency of 1 MHz. In the second embodiment, by further using a blocking wall 19 having an effect of blocking electromagnetic waves, the same effect as in the first embodiment is obtained even if the distance d is less than 5 cm. . Therefore, the size of the entire wiring duct can be reduced.
According to the wiring duct of the said embodiment, in addition to the effect of (1) in 1st Embodiment, the following effects can be acquired.
(2) According to the wiring duct, since the shielding wall having the effect of shielding electromagnetic waves is further provided between the power supply wiring 13A and the communication wiring 13B, the shielding wall 19 is not provided. Even if the interval is made smaller than this, it is possible to equally suppress the occurrence of noise in the communication wiring. Therefore, the size of the entire wiring duct can be reduced, which contributes to space saving and cost reduction.
(3) Since the blocking wall 19 is grounded, the effect of shielding the induced magnetic field is further increased. Therefore, the induction noise caused by the power supply wiring can be further suppressed from occurring in the communication wiring. Therefore, in order to obtain the same suppression effect, the interval can be further reduced.
(Third embodiment)
A third embodiment of a wiring duct embodying the present invention will be described below with reference to FIG. Since the basic structure and usage of the wiring duct are the same as those of the conventional and first and second embodiments, the description thereof will be omitted and only the characteristic part will be described in detail.
As shown in FIG. 3, the wiring duct has a substantially rectangular tube-like appearance having a communication hole 17 opened along the longitudinal direction at the bottom 15 which is one side surface. The opposite side surface of the bottom portion 15 is a fixed portion 14 that is fixed to a ceiling or the like, and a portion that connects the fixed portion 14 and the bottom portion 15 is a connecting portion 16. A blocking wall 19 extends from the center of the inner peripheral surface of the fixed portion 14 toward the bottom side from the fixed portion side. The bottom portion 15, the fixed portion 14, the connecting portion 16, and the blocking wall 19 are formed by covering the metallic core material 21 with resin, and have an effect of blocking electromagnetic waves.
A flange 18A extends from the inner peripheral surface of one connecting portion 16 across the blocking wall 19 on the inner peripheral surface of the bottom portion 15 from the outside to the inside in the short direction. On the other end, a long power supply wiring 13A for supplying commercial power is disposed along the longitudinal direction. Therefore, except for the communication hole 17, the power supply wiring 13 </ b> A is surrounded by a blocking member including the bottom 15, the fixed portion 14, the connecting portion 16, and the blocking wall 19 having an effect of blocking electromagnetic waves. Further, when an apparatus is electrically connected to the wiring duct, an electrical contact of the apparatus to be connected is inserted into the duct body through the communication hole 17 and connected to the power supply wiring 13A.
A flange 18B extends from the inner peripheral surface of the other connecting portion 16 across the blocking wall 19 on the inner peripheral surface of the bottom portion 15 from the outside to the inside in the short direction. A long communication wire 13B for feeding a communication signal is arranged along the longitudinal direction at the end of the other side. Therefore, except for the communication hole 17, the communication wiring 13 </ b> B is surrounded by a blocking member including the bottom 15, the fixed portion 14, the connecting portion 16, and the blocking wall 19 having an effect of blocking electromagnetic waves. Although not specifically shown, since the blocking member is grounded, the effect of shielding the induced magnetic field is further increased. Therefore, the induction noise caused by the power supply wiring 13A can be further suppressed from occurring in the communication wiring 13B. When a communication device is connected to the wiring duct, the communication contact of the connected device is inserted into the duct body through the communication hole 17 and connected to the communication wire 13B.
Here, the shortest distance between the power supply wiring 13A and the communication wiring 13B is 4 cm. In other words, a gap d of 4 cm is provided between the power supply wiring 13A and the communication wiring 13B. By providing this distance d, it is possible to suppress the occurrence of inductive noise caused by the power supply wiring 13A in the communication wiring 13B.
The size of the interval d can be arbitrarily determined as long as induction noise caused by the power supply wiring 13A can be suppressed from occurring in the communication wiring 13B. Therefore, it is appropriately determined depending on the magnitude of the voltage applied to the power supply wiring 13A and the quality required for the communication wiring 13B. As described above, when there is no blocking member, when 100V AC used for ordinary household power is used as power, the distance d is set to 5 cm or more, which is equivalent to the average crosstalk attenuation of the many-to-subscriber line. A near-end attenuation of 52 dB or more can be secured on average at a signal frequency of 1 MHz. In the third embodiment, since the power supply wiring 13A and the communication wiring 13B are surrounded by a blocking member having an effect of blocking electromagnetic waves, even if the distance d is less than 5 cm, the first The same effects as those of the embodiment are obtained. Therefore, the size of the entire wiring duct can be reduced.
According to the wiring duct of the above embodiment, the following effects can be obtained instead of the effects (2) and (3) in the second embodiment.
(2) According to the wiring duct, since both the power supply wiring 13A and the communication wiring 13B are surrounded by the electromagnetic wave shielding member having an effect of blocking electromagnetic waves, the induction caused by the power supply wiring 13A Generation of noise in the communication wiring 13B can be further suppressed. Therefore, it is possible to further reduce the interval in order to obtain an equivalent suppression effect.
(3) Since the blocking member is grounded, the effect of shielding the induced magnetic field is further increased. Therefore, the induction noise caused by the power supply wiring 13A can be further suppressed from occurring in the communication wiring 13B.
(Fourth embodiment)
An embodiment of a wiring duct embodying the present invention will be described below with reference to FIG. Since the basic structure and method of use of the wiring duct are the same as those of the conventional and first to third embodiments, the description thereof will be omitted and only the characteristic part will be described in detail.
As shown in FIGS. 4A and 4B, the wiring duct has a substantially rectangular tube-like appearance having a communication hole 17 opened along the longitudinal direction at the bottom 15 which is one side surface. The opposite side surface of the bottom portion 15 is a fixed portion 14 that is fixed to a ceiling or the like, and the portion that connects the fixed portion 14 and the bottom portion 15 at the end is a connecting portion 16. From the inner peripheral surface of the connecting portion 16, a flange 18 </ b> A extends from the outside toward the inside in the short direction, and a long length for supplying commercial power to the inner end of the flange 18 </ b> A. The power supply wiring 13A is disposed along the longitudinal direction. Therefore, when an apparatus is electrically connected to the wiring duct, an electrical contact of the connected apparatus is inserted into the duct body through the communication hole 17 and connected to the power supply wiring 13A.
A flange 18B extends from the center portion of the inner peripheral surface of the fixed portion 14 from the fixed portion side toward the bottom portion side, and a length for supplying a communication signal to the end portion on the bottom portion side of the flange 18B. Two long communication wires 13B are arranged along the longitudinal direction. As shown in FIGS. 4A and 4B, the two communication wires 13B are twisted together. For this reason, it is possible to suppress noise generated from the communication wiring 13B. Therefore, noise can be further suppressed from occurring in the communication wiring.
In the present embodiment, the shortest distance between the power supply wiring 13A and the communication wiring 13B is 5 cm. In other words, a gap d of 5 cm is provided between the power supply wiring 13A and the communication wiring 13B. By providing this distance d, it is possible to suppress the occurrence of inductive noise caused by the power supply wiring 13A in the communication wiring 13B.
The size of the interval d can be arbitrarily determined as long as induction noise caused by the power supply wiring 13A can be suppressed from occurring in the communication wiring 13B. Therefore, it is appropriately determined depending on the magnitude of the voltage applied to the power supply wiring 13A and the quality required for the communication wiring 13B. As described above, when 100V AC used for normal household power is used as the power, by setting the interval d to 5 cm or more, the signal frequency is 1 MHz which is equivalent to the average crosstalk attenuation of the many-to-subscriber line. A near-end attenuation amount of 52 dB or more on average can be secured. In the fourth embodiment, in addition to the effects, noise generated by the communication wiring 13B itself can be reduced, and generation of induced noise in the communication wiring 13B can be further suppressed.
According to the wiring duct of the said embodiment, in addition to the effect of (1) in 1st Embodiment, the following effects can be acquired.
(4) According to the wiring duct, since the plurality of communication wires 13B are twisted together, it is possible to suppress noise generated from the communication wires 13B. Therefore, the generation of noise in the communication wiring 13B can be further suppressed.
In addition, you may change the said embodiment as follows.
In the first embodiment, the positional relationship among the flange 18A, the flange 18B, the power supply wiring 13A, and the communication wiring 13B is not limited to the arrangement shown in FIG. In short, it is only necessary to provide an interval d between the power supply wiring 13A and the communication wiring 13B for suppressing the induction noise caused by the power supply wiring 13A from occurring in the communication wiring 13B. Other arrangements may be used depending on the application. For example, the positional relationship shown in FIGS. 5 to 8 may be used.
Similarly, in the second embodiment, the positional relationship between the flange 18A, the flange 18B, the power supply wiring 13A, and the communication wiring 13B is not limited to the arrangement shown in FIG. In short, an interval d is provided between the power supply wiring 13A and the communication wiring 13B to suppress the induction noise caused by the power supply wiring 13A from occurring in the communication wiring 13B. In addition, it is only necessary that the blocking wall 19 is provided between the power supply wiring 13A and the communication wiring 13B, and other arrangements may be used depending on the application. For example, the positional relationship shown in FIGS. 9 and 10 may be used.
Similarly, in the third embodiment, the positional relationship between the flange 18A, the flange 18B, the power supply wiring 13A, and the communication wiring 13B is not limited to the arrangement shown in FIG. In short, an interval d is provided between the power supply wiring 13A and the communication wiring 13B to suppress the induction noise caused by the power supply wiring 13A from occurring in the communication wiring 13B. In addition, it is sufficient that at least one of the power supply wiring 13A or the communication wiring 13B is surrounded by the electromagnetic wave shielding member, and other arrangements may be employed depending on the application. In the case where the signal extraction from the communication wiring 13B does not have to be output from an arbitrary place, for example, as shown in FIGS. 11 and 12, the communication wiring 13B is completely surrounded by the electromagnetic wave shielding member. good. In this case, it is possible to further suppress the occurrence of inductive noise caused by the power supply wiring 13A in the communication wiring 13B.
In the said embodiment, although the shielding wall 19 and the electromagnetic wave shielding member are earth | grounded, it is not essential. If the effect of suppressing the induction noise caused by the power supply wiring 13A from occurring in the communication wiring 13B is sufficient, the cost can be reduced by omitting the grounding.
The configurations in the first to fourth embodiments may be used in combination. For example, the blocking wall 19 may be provided and the two communication wires 13B may be twisted together, or the two communication wires 13B may be twisted together and the communication The wiring 13 </ b> B may be surrounded by an electromagnetic wave shielding member. With such a structure, inductive noise caused by the power supply wiring 13A can be suppressed from occurring in the communication wiring 13B, and noise generated from the communication wiring 13B can also be suppressed.
(Fifth embodiment)
A fifth embodiment of a wiring duct embodying the present invention will be described with reference to FIGS. 16 and 17. Further, since the basic structure and method of use of the wiring duct are the same as those of the prior art and the first to fourth embodiments, the description thereof will be omitted and only the characteristic part will be described in detail.
As shown in FIG. 16, the wiring duct 201 laid on an installation surface (not shown) such as a ceiling or a wall indoors such as a factory or a store extends in a predetermined linear direction (hereinafter referred to as “longitudinal direction L”). It is a molded body. Specifically, the wiring duct 201 is a linear molded body having a dimension in the longitudinal direction L of, for example, 1 to 3 m.
As shown in FIGS. 16 and 17, the wiring duct 201 includes a core 210 made of a metal material, an insulator 220 made of an insulating material provided on the core 210, and a plurality of electrode pairs 230 supported by the insulator 220. , 240. The core 210, the insulator 220, and the electrode pairs 230 and 240 extend along the longitudinal direction L. That is, the longitudinal direction of the core 210 and the longitudinal direction of the electrode pairs 230 and 240 are the longitudinal direction L of the wiring duct 201.
The wiring duct 201 has an internal space in which the electrode pairs 230 and 240 are accommodated, and an opening 201a that is continuous with the internal space. The opening 201a that opens in a predetermined direction is provided extending in the longitudinal direction L. Accordingly, by connecting a wiring duct plug (not shown) to the electrode pair 230, 240 through such an opening 201a, an electric device or a communication device connected to the electrode pair 230, 240 via the wiring duct plug. Can be provided indoors along the wiring duct 201.
As shown in FIG. 17, the core 210 that is the core material of the wiring duct 201 has a base portion 211 that is provided facing the installation surface on which the wiring duct 201 is installed. The flat base portion 211 extending in the left-right direction in the cross section perpendicular to the longitudinal direction L extends along the longitudinal direction L. The base portion 211 is provided with a through hole (not shown), and the base portion 211 is fixed to the ceiling by tightening the base portion 211 against the ceiling as the installation surface using a screw inserted through the through hole. The wiring duct 201 is laid on the ceiling which is the installation surface.
Hereinafter, in the description of the wiring duct 201, “upper” means a direction toward the ceiling when the base portion 211 faces the ceiling. The up and down direction including the upper side and the lower side is a direction orthogonal to the longitudinal direction L that is the direction in which the wiring duct 201 extends. Moreover, the direction orthogonal to the longitudinal direction L and the up-down direction is a left-right direction, and the left side and the right side are directions indicated by arrows in the figure.
The core 210 having a substantially rectangular outer shape in a cross section perpendicular to the longitudinal direction L is formed so that the right side wall part 212 provided on the right side, the left side wall part 213 provided on the left side, and the base part 211 provided on the upper side face the lower side. And an opposing wall 214 provided on the surface.
The right side wall 212 connected to the right end of the base 211 extends in the longitudinal direction L and extends downward from the base 211 in the opposite direction. Further, the left side wall portion 213 connected to the left end portion of the base portion 211 extends downward along the longitudinal direction L from the base portion 211. Therefore, the right side wall portion 212 and the left side wall portion 213 face each other in the left-right direction orthogonal to the longitudinal direction L, and are provided in parallel along the longitudinal direction L.
The opposing wall 214 connected to the lower end of the right wall 212 and the lower end of the left wall 213 extends along the longitudinal direction L. The opposing wall portion 214 connected to the lower end portion of the right wall portion 212 extends from the right wall portion 212 toward the left. The opposing wall portion 214 connected to the lower end portion of the left side wall portion 213 extends from the left side wall portion 213 toward the right. Therefore, when the base 211 is provided on the ceiling, the base 211 and the opposing wall 214 are opposed to each other in the vertical direction orthogonal to the longitudinal direction L and are provided in parallel along the longitudinal direction L.
The core 210 configured as described above has an internal space in which the electrode pairs 230 and 240 are provided. The core 210 is provided with an opening 201a that opens an internal space. An opening 201 a included in the core 210 of the wiring duct 201 is provided in the facing wall 214. Therefore, when the base 211 is provided on the ceiling, the opening 201a opens downward, and the internal space of the core 210 is open downward.
The core 210 in which the base portion 211, the right side wall portion 212, the left side wall portion 213, and the opposing wall portion 214 are integrally formed is made of aluminum which is a nonmagnetic metal material. The core 210 shown in FIG. 16 can be formed by casting, for example.
A blocking wall 260 extending downward from the base 211 is connected to the central portion of the base 211 in the left-right direction. The blocking wall 260 extending in the up-down direction perpendicular to the left-right direction is made of a metal material, and is provided between the plurality of electrode pairs 230, 240 provided at intervals in the left-right direction. The blocking wall 260 formed integrally with the base portion 211 of the core 210 is made of aluminum which is the same material as the core 210.
The insulator 220 provided in the core 210 is provided so as to cover the surface of the core 210 so that the electrode pairs 230 and 240 and the core 210 are not connected. The insulator 220 supports the electrode pairs 230 and 240 inside the core 210. Therefore, the core 210 is insulated from the electrode pairs 230 and 240 and functions as an electromagnetic shield. Note that the insulator 220 may not be provided on the entire surface of the core 210.
As described above, the plurality of electrode pairs 230 and 240 provided in the core 210 are provided at intervals in the left-right direction which is a direction perpendicular to the longitudinal direction L. The electrode pair 230 is provided so as to be located on the right side of the electrode pair 240, and the electrode pair 240 is provided so as to be located on the left side of the electrode pair 230.
One electrode pair 230 includes two conductors 231 and 232 supported by an insulator 220 provided on the right side wall 212 of the core 210. The conductors 231 and 232 extending in the longitudinal direction L are provided at an interval in the longitudinal direction L and the vertical direction orthogonal to the horizontal direction. That is, the conductor 231 is provided so as to be positioned above the conductor 232, and the conductor 232 is provided so as to be positioned below the conductor 231.
One electrode pair 240 includes two conductors 241 and 242 supported by an insulator 220 provided on the left side wall 213 of the core 210. The conductors 241 and 242 are also provided at intervals in the up and down direction, which is a direction perpendicular to the right and left direction. That is, the conductor 241 is provided so as to be positioned above the conductor 242, and the conductor 242 is provided so as to be positioned below the conductor 241.
As described above, each of the electrode pairs 230 and 240 is constituted by two conductors, and the conductors 231, 232, 241, and 242 included in the electrode pairs 230 and 240 are exposed in the wiring duct 201. Specifically, the conductors 231 and 232 are provided so that the left surface thereof is exposed, and the conductors 241 and 242 are provided so that the right surface thereof is exposed.
In the wiring duct 201, the capacitance of the conductor 241 constituting the electrode pair 240 and the capacitance of the conductor 242 constituting the electrode pair 240 are configured to be the same. That is, the capacitances of the conductors 241 and 242 constituting one electrode pair 240 are equal to each other.
The capacitance of the conductor 241 includes the distance from the conductor 241 to the core 210 and the conductor 242 which are the conductors facing the conductor 241, the area of the portion where the conductor 241 and the core 210 and the conductor 242 face each other, and the conductor 241, the core 210 and the conductor 241. 242 depends on the dielectric constant of the insulator 220 provided between them. Similarly, the capacitance of the conductor 242 includes the distance from the conductor 242 to the core 210 and the conductor 241 that are conductors facing the conductor 242, the area of the portion where the conductor 242 faces the core 210 and the conductor 241, and the conductor 242 and core 241. It depends on the dielectric constant of the insulator 220 provided between 210 and the conductor 241. Therefore, the capacitances of the conductors 241 and 242 are equal to each other by adjusting the shapes and arrangement of the core 210, the insulator 220, and the conductors 241 and 242.
The capacitance of the conductor 241 can be calculated based on the structure within a predetermined range A1 from the center of the conductor 241 in a cross section perpendicular to the longitudinal direction L as shown in FIG. Further, the capacitance of the conductor 242 to be compared with the capacitance of the conductor 241 can also be calculated based on the structure within the predetermined range A2 from the center of the conductor 242 in the cross section perpendicular to the longitudinal direction L. it can.
As described above, even in the wiring duct 201 that does not have a structure such as a twisted pair cable, the balance of the conductors 241 and 242 can be increased. The core 210 is formed so that the cross-sectional shape is line-symmetric in the left-right direction, and the electrode pair 230 is provided at a position that is line-symmetric with the electrode pair 240 about the center line of the core 210 in the left-right direction. The capacitances of the conductors 231 and 232 constituting the electrode pair 230 are also equal to each other.
According to the present embodiment, when the electrode pair 240 is used as a signal transmission path to be balanced and the electrode pair 230 is used as a power transmission path, the following effects can be obtained.
(1) A plurality of electrode pairs 230, 240 are provided at intervals in the left-right direction, which is a predetermined direction, and the two conductors 231, 232 constituting the electrode pair 230 are arranged in the vertical direction, which is a direction perpendicular to the left-right direction. Provided at intervals. For this reason, compared with the case where the conductors 231 and 232 are provided at intervals in the left-right direction, the wiring duct 201 can be reduced in size. In addition, since the two conductors 241 and 242 constituting the electrode pair 240 are also provided with an interval in the vertical direction, the conductor 241 and 242 of the wiring duct 201 are compared with the case where the conductors 241 and 242 are provided with an interval in the left and right direction. Miniaturization can be achieved. A blocking wall 260 made of a metal material is provided between the electrode pairs 230 and 240 in the vertical direction. Therefore, the shielding wall 260 can reduce electromagnetic coupling between the plurality of electrode pairs 230 and 240 and suppress electromagnetic interference in the plurality of electrode pairs 230 and 240.
(2) A blocking wall 260 is formed integrally with the core 210. Therefore, the electromagnetic interference in the plurality of electrode pairs 230 and 240 is suppressed as compared with the case where the core 210 and the blocking wall 260 are separated from each other without providing a gap between the core 210 and the blocking wall 260. can do.
(3) The core 210 is made of aluminum which is a non-magnetic (non-ferromagnetic) metal material. For this reason, compared with the case where the core 210 consists of iron which is a ferromagnetic material, the electromagnetic wave to the exterior of the wiring duct 201 can be interrupted | blocked, for example.
(4) The core 210 and the blocking wall 260 are made of aluminum which is a non-magnetic metal material. For this reason, compared with the case where the core 210 and the shielding wall 260 are made of iron that is a ferromagnetic material, for example, electromagnetic interference in the plurality of electrode pairs 230 and 240 can be suppressed.
(5) Since the capacitances of the two conductors 241 and 242 constituting one electrode pair 240 are equal to each other, the balance between the two conductors 241 and 242 is increased, and electromagnetic interference in the plurality of electrode pairs 230 and 240 is reduced. Can be suppressed.
Further, the capacitances of the two conductors 231 and 232 constituting the other electrode pair 230 are equal to each other. For this reason, even when a signal transmission path that is balancedly connected by the two conductors 231 and 232 is formed, electromagnetic interference in the plurality of electrode pairs 230 and 240 can be suppressed.
(Sixth embodiment)
Next, a second embodiment, which is an embodiment of the present invention, will be described with reference to FIGS. In addition, about the structure similar to 1st Embodiment, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted or simplified and demonstrated.
As shown in FIG. 18, the wiring duct 201 according to the present embodiment has two openings 201b and 201c that are continuous with the internal space. Openings 201b and 201c that open in a predetermined direction are provided extending in the longitudinal direction L.
As shown in FIG. 19, the core 210 according to the present embodiment has an internal space S1 in which the electrode pair 230 is provided and an internal space S2 in which the electrode pair 240 is provided. Thus, the plurality of internal spaces S1 and S2 in which the electrode pairs 230 and 240 are provided are separated by the blocking wall 260.
The blocking wall 260 according to the present embodiment is connected to the center of the opposing wall 214 that extends longer in the left-right direction than the fifth embodiment, and the blocking wall 260 causes the base 211 and the opposing wall 214 to Is connected. Therefore, in the cross section perpendicular to the longitudinal direction L, the internal space S1 and the internal space S2 are not continuous.
The core 10 configured as described above has a plurality of internal spaces S1 and S2 in which electrode pairs 230 and 240 are provided. The core 210 is provided with a plurality of openings 201b and 201c that open the internal spaces S1 and S2.
By forming the core 210 so that the cross-sectional shape perpendicular to the longitudinal direction L is axisymmetric in the left-right direction, which is the predetermined direction, the plurality of openings 201b, 201c open in different directions in the left-right direction. ing. That is, the opening 1b that opens the internal space S1 is provided in the right side wall 212, and the opening 201c that opens the internal space S2 is provided in the left side wall 213.
Therefore, when the base 211 is provided on the ceiling, the opening 201b opens to the right, and the internal space S1 of the core 210 is open to the right. Furthermore, the opening 201c opens toward the left, and the inner space S2 of the core 210 is open toward the left.
Further, the core 210 according to the present embodiment is formed so as to be symmetric with respect to a center line C that bisects the opening 201b in a cross section perpendicular to the longitudinal direction L. In addition, since the core 210 is formed so as to be line symmetric in the left-right direction, the core 210 is line symmetric about the center line C that bisects the opening 201c in a cross section perpendicular to the longitudinal direction L. It is also formed.
That is, the right side wall 212 according to the present embodiment is connected to the right end of the opposing wall 214 as well as the right end of the base 211. The right side wall 212 connected to the right end of the opposing wall 214 extends upward from the opposing wall 214 and extends in the longitudinal direction L.
Similarly to the right side wall 212, the left side wall 213 is provided not only on the left end of the base 211 but also on the left end of the opposing wall 214. The right side wall 212 connected to the left end of the facing wall 214 extends upward from the facing wall 214 and extends in the longitudinal direction L.
The right side wall 212 and the left side wall 213 according to the present embodiment have lengths extending in the vertical direction as compared with the fifth embodiment in order to form openings 201b and 201c having desired sizes. Is formed to be short.
In the present embodiment, the conductors 231 and 232 are supported by the insulator 220 provided on the blocking wall 260, and the conductors 241 and 242 are also supported by the insulator 220 provided on the blocking wall 260. Therefore, in this embodiment, the conductors 231 and 232 are provided so that the right side surfaces thereof are exposed, and the conductors 241 and 242 are provided so that the left side surfaces thereof are exposed.
The two conductors 231 and 232 are disposed in positions that are symmetrical with respect to a center line C that bisects the opening 201b in a cross section perpendicular to the longitudinal direction L. Further, the two conductors 241 and 242 are arranged in positions that are symmetric with respect to the center line C that bisects the opening 201 c in the cross section perpendicular to the longitudinal direction L.
Also in the wiring duct 201 according to the present embodiment configured as described above, the capacitances of the conductors 231 and 232 constituting the electrode pair 230 are equal to each other, and the capacitances of the conductors 241 and 242 constituting the electrode pair 240 are the same. Are also equal to each other.
According to this embodiment, in addition to the effects (1) to (5) of the fifth embodiment, the following effects can be achieved.
(6) The core 210 has a plurality of internal spaces S1 and S2 in which electrode pairs 230 and 240 are provided, as well as being separated by a blocking wall 260. The core 210 is provided with a plurality of openings 201b and 201c that open the internal spaces S1 and S2, and the plurality of openings 201b and 201c are opened in different directions. For this reason, the electromagnetic coupling of the plurality of electrode pairs 230 and 240 can be further reduced, and the electromagnetic interference in the plurality of electrode pairs 230 and 240 can be further suppressed.
(7) By forming the core 210 so that the cross-sectional shape is line symmetric in the left-right direction, which is a predetermined direction, the plurality of openings 201b and 201c are opened in different directions. With such a configuration, the opening 201b can be opened toward the right, which is one side in the left-right direction, and the opening 201c can be opened toward the left, which is the other in the left-right direction.
(8) The core 210 is provided with an opening 201c that opens the internal space S2 in which the electrode pair 240 is provided, and the core 210 bisects the opening 201c in a cross section perpendicular to the longitudinal direction L. It is formed so as to be line symmetric about the line C. Two conductors 241 and 242 constituting one electrode pair 240 are arranged at positions that are line-symmetric with respect to the center line C in the cross section perpendicular to the longitudinal direction of the core 210. With such a configuration, the capacitances of the two conductors 241 and 242 constituting one electrode pair 240 can be made equal to each other with a simple shape.
The core 210 is provided with an opening 201b that opens the internal space S1 in which the electrode pair 230 is provided, and the core 210 bisects the opening 201b in a cross section perpendicular to the longitudinal direction L. It is formed so as to be line symmetric with respect to C. The two conductors 231 and 232 constituting the other electrode pair 230 are also arranged at positions that are line-symmetric with respect to the center line C in the cross section perpendicular to the longitudinal direction of the core 210. Accordingly, the capacitances of the two conductors 231 and 232 constituting the other electrode pair 230 can be made equal to each other with a simple shape.
(Seventh embodiment)
Next, a seventh embodiment, which is an embodiment of the present invention, will be described with reference to FIG. In addition, about the structure similar to 5th Embodiment, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted or simplified and demonstrated.
As shown in FIG. 20, the wiring duct 201 according to the present embodiment has a configuration in which the blocking wall 260 according to the fifth embodiment is not provided. Therefore, although the effect of the above (1) cannot be obtained, since the capacitance of the conductor 241 and the capacitance of the conductor 242 constituting the electrode pair 240 are the same, the above ( The effect 5) can be obtained.
According to the present embodiment, when the electrode pair 240 is used as a signal transmission path to be balanced and the electrode pair 230 is used as a power transmission path, the following effects can be obtained.
(9) A plurality of electrode pairs 230, 240 are provided at intervals in the left-right direction, which is a predetermined direction, and the two conductors 231, 232 constituting the electrode pair 230 are arranged in the vertical direction, which is a direction perpendicular to the left-right direction. Provided at intervals. For this reason, compared with the case where the conductors 231 and 232 are provided at intervals in the left-right direction, the wiring duct 201 can be reduced in size. In addition, since the two conductors 241 and 242 constituting the electrode pair 240 are also provided with an interval in the vertical direction, the conductor 241 and 242 of the wiring duct 201 are compared with the case where the conductors 241 and 242 are provided with an interval in the left and right direction. Miniaturization can be achieved. The capacitances of the two conductors 241 and 242 constituting one electrode pair 240 are equal to each other. For this reason, the balance of the two conductors 241 and 242 can be increased, and electromagnetic interference in the plurality of electrode pairs 230 and 240 can be suppressed.
Further, the capacitances of the two conductors 231 and 232 constituting the other electrode pair 230 are equal to each other. For this reason, even when a signal transmission path that is balancedly connected by the two conductors 231 and 232 is formed, electromagnetic interference in the plurality of electrode pairs 230 and 240 can be suppressed.
(Eighth embodiment)
Next, a fourth embodiment, which is an embodiment of the present invention, will be described with reference to FIGS. Note that the configuration of the wiring duct 201 according to the present embodiment is the same as that of the first embodiment, and a description thereof will be omitted.
As shown in FIG. 21, the invention according to this embodiment includes a plurality of wiring ducts 201 according to the fifth embodiment, and the signal transmission path is formed by connecting electrode pairs 240 included in each of the wiring ducts 201 to each other. 204 is a wiring duct system in which 204 is formed.
The wiring duct system includes a duct connecting member 207 which is a wiring duct connecting member for connecting a plurality of wiring ducts 201 to each other. By inserting the duct connecting member 207 into the wiring duct 201 from the longitudinal direction L, the wiring duct 201 and another wiring duct 201 are connected.
By connecting the wiring duct 201 and the other wiring duct 201, the electrode pairs 230 included in each of the wiring ducts 201 are connected to each other, and the electrode pairs 230 included in each of the wiring ducts 201 are connected to each other. The electrode pair 240 is connected to each other. The power transmission path 203 is formed by the electrode pair 230 connected to each other via the duct connection member 207, and the signal transmission path 204 is formed to be balanced by the electrode pair 240 connected to each other via the duct connection member 207. Has been.
In the present embodiment, the signal transmission path 204 has a structure that reverses the direction of magnetic flux generated when a current flows through the electrode pair 240 forming the signal transmission path 204. FIG. 22 is a schematic diagram showing a structure in which the direction of magnetic flux is reversed in the wiring duct system in FIG.
As shown in FIG. 22, the two conductors 241 and 242 constituting the signal transmission path 204 are connected so as to cross each other. Specifically, the conductor 241 of the electrode pair 240 included in one wiring duct 201 is connected to the conductor 242 of the electrode pair 240 included in the other wiring duct 201 by a duct connecting member 207 that connects the two wiring ducts 201. ing. The conductor 242 of the electrode pair 240 included in one wiring duct 201 is connected to the conductor 241 of the electrode pair 240 included in the other wiring duct 201.
By connecting the conductors 241 and 242 of the electrode pair 240 as described above, the duct connecting member 207 is configured to reverse the direction of magnetic flux generated when a current flows through the electrode pair 240.
In the power transmission path 203 for transmitting AC power, the two conductors 231 and 232 are not connected so as to intersect. In other words, the conductors 231 of the electrode pairs 230 included in the two wiring ducts 201 are connected to each other by the duct connecting member 7, and the conductors 232 of the electrode pairs 230 are connected to each other.
According to this embodiment, the following effects can be achieved.
(10) The signal transmission path 204 formed by connecting the electrode pairs 240 included in each of the wiring ducts 201 to each other has a structure that reverses the direction of the magnetic flux generated when a current flows through the electrode pairs 240. ing. For this reason, the magnetic flux generated by the current flowing through the electrode pair 240 can be canceled to reduce electromagnetic coupling, and electromagnetic interference in the plurality of electrode pairs 230 and 240 can be further suppressed.
(11) The direction of the magnetic flux generated by the current flowing through the electrode pair 240 is reversed by the duct connecting member 207 which is a wiring duct connecting member. Therefore, even if the wiring duct 201 does not have a structure for reversing the direction of the magnetic flux generated by the current flowing through the electrode pair 240, a wiring duct system that exhibits the effect (10) can be configured. .
In addition, this invention is not limited to the said embodiment, A various design change is possible based on the meaning of this invention, and they are not excluded from the scope of the present invention. For example, the above embodiment may be modified as follows, or the following modifications may be combined.
The core 210 and the blocking wall 260 may be formed of a nonmagnetic metal material other than aluminum. As described above, the core 210 and the blocking wall 260 are preferably formed of a nonmagnetic metal material, but may be formed of a metal material other than the nonmagnetic material.
For example, as shown in FIG. 23 according to the modified example of the fifth embodiment, the blocking wall 260 may be joined to the core 210, and the blocking wall 260 may be integrally formed with the core 210. According to such a configuration, the blocking wall 260 can be formed using a material different from that of the core 210.
As shown in FIG. 24 according to the modified example of the fifth embodiment, the blocking wall 260 formed integrally with the core 210 may be formed by bending the core 210 and processing it.
As shown in FIG. 10 according to the modification in which the blocking wall 260 is configured by a member different from the core 210, the blocking wall 260 can be provided without being joined to the core 210.
You may change suitably the shape and arrangement | positioning of the two conductors 241,242 which comprise the electrode pair 240. FIG. Moreover, you may change suitably the shape and arrangement | positioning of the two conductors 231 and 232 which comprise the other electrode pair 230. FIG.
For example, as shown in FIG. 26, the conductors 231, 232, 241, and 242 may be supported by an insulator 220 provided on the blocking wall 260 in the internal space of the core 210 according to the fifth embodiment.
For example, as shown in FIG. 27, in the internal spaces S1 and S2 of the core 210 according to the sixth embodiment, the conductors 231, 232, 241 and 242 are provided in parts other than the blocking wall 260. It may be supported by.
For example, conductors 233 and 243 other than the conductors 231, 232, 241, and 242 may be provided inside the core 210, as shown in FIG. 28 according to a modification of the fifth embodiment. The conductors 233 and 243 that do not constitute the electrode pairs 230 and 240 are preferably configured as ground electrodes.
The wiring duct may include three or more electrode pairs. In a wiring duct having three or more electrode pairs, a plurality of blocking walls are preferably provided. The shape and arrangement of the blocking wall may be changed as appropriate.
In all the electrode pairs provided in the wiring duct, it is preferable that the capacitances of the two conductors constituting the electrode pair are equal to each other. However, in all the electrode pairs provided in the wiring duct, the two conductors constituting the electrode pair. May not be equal to each other. That is, in addition to the electrode pair configured by two conductors having the same capacitance, the wiring duct may include an electrode pair configured by two conductors having different capacitances.
For example, as shown in FIG. 29 according to the modification of the fifth embodiment, the two conductors 231 and 232 constituting the electrode pair 230 may be provided with a gap in the left-right direction. That is, in all the electrode pairs provided in the wiring duct, the two conductors constituting the electrode pair may not be provided with a gap in the vertical direction. However, in all the electrode pairs, it is most preferable that the two conductors constituting the electrode are provided with an interval in the vertical direction.
When two conductors constituting one electrode pair are provided with an interval in the vertical direction, the two conductors do not have to be positioned on a straight line in the vertical direction. That is, in one electrode pair, two conductors provided at intervals in a direction perpendicular to the predetermined direction may be provided at intervals in the predetermined direction.
In the eighth embodiment, wiring ducts other than the wiring duct 201 according to the fifth embodiment may be connected to each other. For example, the wiring duct 201 according to the second or third embodiment may be connected to each other, or the wiring ducts having different structures may be connected to each other.
In the eighth embodiment, the wiring duct connecting member having a structure that reverses the direction of the magnetic flux may not be the duct connecting member 207 that connects the two wiring ducts 201. For example, a wiring duct connecting member that connects one wiring duct 201 and two wiring ducts 201 may have a structure that reverses the direction of magnetic flux.
In the eighth embodiment, the wiring duct connecting member may not have a structure for reversing the direction of the magnetic flux. That is, the wiring duct may have a structure for reversing the direction of magnetic flux generated by current flowing through the electrode pair.
(Ninth embodiment)
30 to 32, a wiring duct embodying the present invention and a plug as an embodiment of an electric apparatus suitable for the wiring duct will be described below. In the following description, as shown in FIG. 30, the direction of the installation surface on which the wiring duct is installed is upward, and the opposite direction is downward. For other directions, the direction and orientation indications shown in FIG. 30 are used.
As shown in FIGS. 30 (a) to 30 (d), the wiring duct housing 310 has a substantially rectangular tube shape having an opening 317 provided in the lower surface extending in the longitudinal direction. Specifically, two side wall portions 312 and 313 are provided extending downward from two long sides of the substantially rectangular installation portion 311 fixed to the installation surface. Since the lower end of the side wall 312 and the lower end of the side wall 313 are not connected, the opening 317 described above is formed between the lower end of the side wall 312 and the lower end of the side wall 313. In addition, the upper surface of the installation portion 311 among the outer peripheral surface of the housing 310 is an installation surface 311a that is installed on an installation surface such as a ceiling or a wall.
An insulating member fixing portion 314 and a plug fixing portion 315 which are concave grooves provided in the longitudinal direction are provided on the inner peripheral surface of one side wall portion 313. Electric power conducting wires 331 and 332 are fixed to the insulating member fixing portion 314 in an up-and-down direction via an insulating member 320. That is, the power conducting wires 331 and 332 are arranged in a direction perpendicular to the installation surface 311a. The power conducting wires 331 and 332 are plate-like metal conductors provided extending in the longitudinal direction. One surface of the power conducting wires 331 and 332 is fixed to the insulating member 320. The other surface is exposed surfaces 331s and 332s that are exposed toward the side of the lead wire. By connecting the plug contacts to the exposed surfaces 331 s and 332 s, the wiring duct is configured so that power can be supplied to the plug at an arbitrary position on the conductive line.
31 and 32 show a plug 350 connected to this wiring duct.
As shown in FIG. 31A, the upper end of the plug 350 can be inserted into the opening 317 of the wiring duct. Moreover, although not shown in figure, the outlet for supplying electric power to another electric equipment is provided in the lower end surface. A lever 365 protrudes on the side of the lead wire in the short direction of the exterior 351 of the plug 350. By moving the lever 365 in the longitudinal direction, it is possible to switch between a fixed state in which the plug 350 can be fixed to the wiring duct and a detachable state in which the conductor plug can be attached to and detached from the wiring duct.
As shown in FIG. 31 (b), a contact hole 352 and a fixed blade hole 353 are provided on the conductive wire side in the short direction of the exterior 351 of the plug 350. In the fixed state, the contact protrudes from the contact hole 352 and is connected to the conductor of the wiring duct. At the same time, the fixed blade protrudes from the fixed blade hole 353 and fixes the plug 350 to the wiring duct. On the other hand, in the detachable state, as shown in the figure, the contact and the fixed blade are immersed in the exterior, so that the upper end of the plug 350 can be inserted into the opening of the wiring duct. Become.
The structure of the plug 350 will be described in more detail with reference to FIGS. FIG. 32A is a partially exploded perspective view with the exterior 351 removed. A fixed blade 361 for fixing the plug 350 to the wiring duct is provided at the upper end of the rotary shaft 360 that extends in the vertical direction. Below that, a cylindrical cam 362 is provided. The lower end is connected to the lever 365. Therefore, when the lever 365 is switched, the rotation shaft 360 rotates about the rotation center o.
On the other hand, the slider 370 provided extending in the longitudinal direction has sliding contact shafts 341 provided extending upward from the base 340 in shaft holes 374 that are vertical through holes provided at both ends in the longitudinal direction. Since it is inserted, it can move only in the vertical direction. A central axis in the longitudinal direction is provided with a rotation shaft hole 375 that is a vertical through hole. Further, a cam receiving portion 376 is formed on the inner peripheral surface of the rotation shaft hole 375 so as to mesh with the cylindrical cam 362 of the rotation shaft 360 and convert the rotational motion of the cylindrical cam 362 into a linear motion. Therefore, when the rotary shaft 360 rotates, the slider 370 moves up and down via the cylindrical cam 362.
A plug blade pressing portion 372 and a plug blade pressing portion 373 are provided around the uniaxial hole 374 of the slider 370. A plug blade 381 is provided at a position in contact with the plug blade pressing portion 372 when the slider 370 is moved upward. Similarly, a plug blade 385 is provided at a position in contact with the plug blade pressing portion 373 when the slider 370 is moved upward.
The plug blade 381 and the plug blade 385 are conductive members having a leaf spring structure which is provided extending in the vertical direction and has elasticity in the short direction. A contact 382 is provided at the upper end of the plug blade 381. A contact point 386 is provided at the upper end of the plug blade 385. The lower ends of the plug blade 381 and the plug blade 385 are electrically connected to two insertion ports provided in a not-shown outlet. Further, an inclined portion 383 for ensuring contact between the plug blade pressing portion 372 and the plug blade 381 is provided at a portion that contacts the plug blade pressing portion 372 by the movement of the slider 370. Similarly, an inclined portion 388 for ensuring contact between the plug blade pressing portion 373 and the plug blade 385 is provided at a portion that contacts the plug blade pressing portion 373 by the movement of the slider 370.
As shown in FIG. 32 (b), in the detachable state, the slider 370 is positioned downward in the vertical direction, so the plug blade pressing portion 372 is not in contact with the inclined portion 383, and the plug blade pressing portion 373. Is not in contact with the oblique portion 388. Therefore, no stress from the slider 370 is applied to any of the plug blade 381 and the plug blade 385. Therefore, both the contact 382 and the contact 386 are located on the side opposite to the contact hole from the contact hole 352 due to the elastic force of the plug blade 381 and the plug blade 385. In this state, even if the upper portion of the plug is inserted into the wiring duct from the opening 317 of the wiring duct, the contact 382 is not electrically connected to the power conducting wire 332. Further, the power conducting wire 331 is not electrically connected to the contact point 386. Furthermore, since the fixed blade 361 provided on the rotating shaft 360 is also housed in the exterior 351, the plug 350 is not fixed to the wiring duct. Accordingly, the upper end portion of the plug 350 can be freely put in and out of the opening 317 of the wiring duct.
Transition from the detachable state to the fixed state can be performed only by moving the lever 365. By moving the lever 365, the rotation shaft 360 rotates in conjunction with the lever 365. This rotation is converted into a linear motion by the cylindrical cam 362 and the cam receiving portion 376, and the slider 370 is moved upward.
As shown in FIG. 32C, the plug blade pressing portion 372 of the slider 370 moved upward pushes the plug blade 381 toward the conductor in the short direction, so that the contact 382 moves toward the conductor, and from the contact hole 352. Projects to the conductor side. Similarly, the plug blade pressing portion 373 of the slider 370 moved upward pushes the plug blade 385 toward the conducting wire in the short direction, so that the contact 386 moves to the conducting wire and protrudes from the contact hole 352 to the conducting wire. As the rotating shaft 360 rotates, the fixed blade 361 provided at the upper end of the rotating shaft 360 moves to the conducting wire side by rotation and protrudes from the fixed blade hole 353 to the conducting wire side.
As shown in FIG. 33, in the fixed state, the contact 382 contacts the exposed surface 332s of the power conducting wire 332 and the contact 386 contacts the exposed surface 331s of the power conducting wire 331, so that the plug 350 is electrically connected to the wiring duct. Connected. Thus, both the contact 382 and the contact 386 are connected to the exposed surface 332 s and the exposed surface 331 s by moving linearly in the direction parallel to the installation surface 311 a with respect to the plug body. On the other hand, since the fixed blade 361 protruding from the fixed blade hole 353 is engaged with the plug fixing portion 315 that is a concave groove, the plug 350 is fixed to the wiring duct.
According to the wiring duct and the plug of the above embodiment, the following effects can be obtained.
(1) In the above embodiment, the power conducting wire 331 and the power conducting wire 332 are arranged in a direction perpendicular to the installation surface 311a. Accordingly, the wiring duct can be reduced in size in the direction parallel to the installation surface 311a, that is, in the short direction, as compared with the conventional case where the power conducting wire 331 and the power conducting wire 332 are disposed facing each other in the short direction. Can do.
(2) In the above embodiment, since the plug 350 is a plug corresponding to the wiring duct, the upper end inserted into the opening 317 is downsized in the direction parallel to the installation surface 311a, that is, in the short direction. Can do.
(10th Embodiment)
A tenth embodiment of a wiring duct embodying the present invention will be described with reference to FIG. Since the tenth embodiment has a configuration in which the shape of the housing of the wiring duct and the number and position of the conductive wires of the ninth embodiment are changed, detailed description of the same parts is omitted.
As shown in FIG. 34, the housing of the wiring duct has a substantially rectangular tube shape having an opening 317 provided in the lower surface extending in the longitudinal direction. Specifically, two side wall portions 312 and 313 are provided so as to extend downward from two long sides of the substantially rectangular installation portion 311 fixed to the installation surface. Since the lower ends of the side walls 312 and 313 are not connected, the above-described opening 317 is formed between the side walls 312 and 313.
On the inner peripheral surface of one side wall portion 313, a plug fixing portion 315 which is a concave groove provided in the longitudinal direction, an insulating member fixing portion 314a, and an insulating member fixing portion 314b are provided in order from the bottom. Yes. In addition, a blocking wall 316 having an effect of blocking electromagnetic waves is provided between the insulating member fixing portion 314a and the insulating member fixing portion 314b.
Electric power conducting wires 331 and 332 are arranged and fixed to the insulating member fixing portion 314a in the vertical direction via the insulating member 320a. In addition, the conducting wires 333 and 334 for communication are fixed to the insulating member fixing portion 314b in the vertical direction via the insulating member 320b. That is, the wiring duct includes power conducting wires 331 and 332 and communication conducting wires 333 and 334 as conducting wires. Moreover, all of these some conducting wire is arranged in the perpendicular | vertical direction with respect to the installation surface 311a in which a wiring duct is installed. Specifically, the communication conductors 333 and 334 are plate-like metal conductors that extend in the longitudinal direction. One surfaces of the power conducting wires 331 and 332 and the communication conducting wires 333 and 334 are fixed to the insulating member 320a and the insulating member 320b, respectively. Further, the other surfaces are exposed surfaces 331 s and 332 s exposed inward, and exposed surfaces 333 s and 334 s. By connecting plug contacts to the exposed surfaces 333s and 334s, a communication signal can be transmitted and received at an arbitrary position on the conductor line.
Therefore, according to the tenth embodiment, in addition to the effects (1) and (2) described in the ninth embodiment, the following effects can be obtained.
(3) In the tenth embodiment, since the communication conductors 333 and 334 are provided as the conductors, a communication signal can be supplied to the electric device simultaneously with the power. In particular, even when an electric device such as a personal computer that requires both power supply and transmission / reception of communication signals is connected, the number of necessary cables can be reduced.
(4) Moreover, all the conducting wires are arrange | positioned in the direction perpendicular | vertical with respect to the installation surface 311a. Therefore, even if both the power conducting wires 331 and 332 and the communication conducting wires 333 and 334 are provided, the size in the direction parallel to the installation surface 311a, that is, the short direction of the wiring duct is shown in the ninth embodiment. It can be equivalent to a wiring duct.
(5) The blocking wall 316 for suppressing the induction noise caused by the power conducting wires 331 and 332 from being generated in the communication conducting wires 333 and 334 includes the power conducting wires 331 and 332 and the communication conducting wires 333 and 334. Provided between. Therefore, it is possible to suppress the occurrence of noise in the communication wires 333 and 334 due to the induction magnetic field generated from the power wires 331 and 332.
In addition, you may change the said embodiment as follows.
In the ninth embodiment, the power supply plug 350 connected to the power conductors 331 and 332 is illustrated, but a communication plug connected to the communication conductor may be used. In that case, a communication outlet such as a USB outlet or a LAN outlet is provided on the lower surface. Further, it may be a power / communication plug connected to both the power lead and the communication lead. In this case, both a power outlet and a communication outlet are provided. The power / communication plug is used for the wiring duct shown in the tenth embodiment, for example.
In the ninth embodiment, the plug 350 is exemplified as the electric device, but the contact is linearly moved in a direction parallel to the installation surface with respect to the electric device main body, so that the contact is connected to the connected surface. Other electrical devices may be used as long as they are electrical devices. For example, a lighting fixture
good.
In the tenth embodiment, all the conductors are arranged in a straight line in the direction perpendicular to the installation surface 311a, that is, in the vertical direction. For example, as shown in FIG. It suffices if they are lined up and down as a whole. That is, the term “arranged in the vertical direction” in the claims and in the present specification means that “arranged in the completely vertical direction” and “arranged in the completely vertical direction” cannot be said. And the case where the wiring ducts are arranged to such an extent that the wiring duct is miniaturized in a direction parallel to the installation surface 311a.
Similarly, in the ninth embodiment, the power conducting wires 331 and 332 are arranged in a straight line in a direction perpendicular to the installation surface 311a, that is, in the vertical direction. It only has to be lined up in the direction.
In the tenth embodiment, a blocking wall 316 is provided for suppressing inductive noise caused by the power conducting wires 331 and 332 in the communication conducting wires 333 and 334. However, the blocking wall 316 may be omitted as long as induction noise can be suppressed from occurring in the communication wires 333 and 334 by other methods. For example, when the vertical size of the wiring duct is not a problem, the noise may be suppressed by increasing the distance between the power conductors 331 and 332 and the communication conductors 333 and 334. . Further, noise may be suppressed externally, such as by providing a core on the communication wires 333 and 334.
In the tenth embodiment, the wiring duct includes one set each of the power conducting wires 331 and 332 and the communication conducting wires 333 and 334, but may have other configurations. For example, instead of the communication conductors 333 and 334, a power conductor for flowing currents having different voltages and phases may be further provided. Further, in addition to the power conductors 331 and 332 and the communication conductors 333 and 334, communication conductors for communication methods with different standards may be further provided, or for power for flowing currents having different voltages and phases. You may further provide conducting wire. Even in these cases, all the conductive wires are arranged in a direction perpendicular to the installation surface 311a, thereby providing an effect of reducing the size of the wiring duct in a direction parallel to the installation surface 311a. In other words, the size of the wiring duct is constant in the direction parallel to the installation surface regardless of the number of conductors, so that the area of the installation surface on which the wiring duct is installed can be constant regardless of the number of conductors. .

The present invention can be widely used for a wiring duct that is installed along a wall surface or a ceiling surface and to which a wiring device is attached from a desired position.

Claims (21)

1. Power supply wiring and communication wiring are arranged inside,
   In a wiring duct capable of supplying power to an electrical device at an arbitrary position on the wiring system of the power supply wiring,
   Wiring characterized in that an interval is provided between the power supply wiring and the communication wiring to suppress the occurrence of inductive noise caused by the power supply wiring in the communication wiring. duct.
2. The wiring duct according to claim 1, further comprising a blocking wall having an effect of blocking electromagnetic waves between the power supply wiring and the communication wiring.
3. The wiring duct according to claim 1 or 2, wherein a plurality of the communication wirings are arranged, and the plurality of communication wirings are twisted together.
4. The wiring duct according to any one of claims 1 to 3, wherein at least one of the power supply wiring and the communication wiring is surrounded by an electromagnetic wave blocking member having an effect of blocking electromagnetic waves.
5. The wiring duct according to claim 4, wherein the electromagnetic wave shielding member is grounded.
6. A wiring duct comprising a core made of a metal material and a plurality of electrode pairs provided inside the core, each of the electrode pairs being constituted by two conductors,
   A plurality of the electrode pairs are provided at intervals in a predetermined direction,
   The two conductors constituting one electrode pair are provided at a distance in a direction perpendicular to the predetermined direction;
   A wiring duct characterized in that a shielding wall made of a metal material is provided between the plurality of electrode pairs, extending in a direction perpendicular to the predetermined direction.
7. The wiring duct according to claim 6, wherein the blocking wall is formed integrally with the core.
8. The wiring duct according to claim 7, wherein the blocking wall is joined to the core, and the blocking wall is integrally formed with the core.
9. The core is divided by the blocking wall and has a plurality of internal spaces provided with the electrode pairs,
   9. The core according to claim 6, wherein the core is provided with a plurality of openings for opening the internal space, and the plurality of openings are opened in different directions. Wiring duct according to item.
10. The wiring according to claim 9, wherein the core is formed so that a cross-sectional shape is line-symmetric in the predetermined direction, so that the plurality of openings are opened in different directions. duct.
11. The wiring duct according to any one of claims 6 to 10, wherein the core is made of a nonmagnetic metal material.
12. The wiring duct according to any one of claims 6 to 11, wherein the core and the blocking wall are made of a non-magnetic metal material.
13. The wiring duct according to any one of claims 6 to 12, wherein the capacitances of the two conductors constituting one electrode pair are substantially equal to each other.
14. A wiring duct comprising a core made of a metal material and a plurality of electrode pairs provided inside the core, each of the electrode pairs being constituted by two conductors,
    A plurality of the electrode pairs are provided at intervals in a predetermined direction,
    The two conductors constituting one electrode pair are provided at a distance in a direction perpendicular to the predetermined direction;
    The wiring duct characterized in that the capacitances of the two conductors constituting one electrode pair are substantially equal to each other.
15. The core is provided with an opening that opens an internal space in which the electrode pair is provided,
    The core is formed so as to be symmetrical with respect to a center line that bisects the opening in a cross section perpendicular to the longitudinal direction of the core;
    The two conductors constituting one electrode pair are arranged at positions that are line-symmetric with respect to the center line in a cross section perpendicular to the longitudinal direction of the core. Or the wiring duct of 13.
16. A wiring duct system comprising a plurality of wiring ducts according to any one of claims 6 to 15, wherein a signal transmission path is formed by connecting the electrode pairs provided in each of the wiring ducts,
    The wiring duct system, wherein the signal transmission path has a structure that reverses the direction of magnetic flux generated when a current flows through the electrode pair forming the signal transmission path.
17. The wiring duct system according to claim 16, further comprising a wiring duct connecting member that connects the plurality of wiring ducts to each other, and the direction of the magnetic flux is reversed by the wiring duct connecting member.
18. A plurality of conductors including at least a power conductor;
    A housing having the conducting wire therein,
    An installation surface that is one of the outer peripheral surfaces of the housing is installed on the installation surface;
    In a wiring duct capable of supplying electric power to an electrical device at an arbitrary position on the power line of the power conductor
    The wiring duct, wherein all of the plurality of conducting wires are arranged in a direction perpendicular to the installation surface.
19. 19. The wiring duct according to claim 18, wherein a communication conductor is included in at least one of the plurality of conductors.
20. The wiring duct according to claim 19, wherein a blocking wall having an effect of blocking electromagnetic waves is provided between the power conducting wire and the communication conducting wire.
21. An electrical device comprising a contact point connected to a connected surface of a conducting wire and connected to the wiring duct according to any one of claims 18 to 20,
    The electric device connected to the connected surface by the contact moving linearly in a direction parallel to the installation surface with respect to the electric device main body.

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