JP2006303614A - Filter connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance safety by connecting a filter easily between a phase line and a neutral line easily without stopping power supply from a commercial power supply line and without requiring extra machining such as cutting thereby eliminating the need for securing an installation place and preventing electric shock. <P>SOLUTION: The filter connector 1 comprises a cable clamp 2 for clamping the conductor 3 of a phase line constituting a commercial power supply line along with a cable sheath 8, a cable clamp 2' for clamping the conductor 9 of a neutral line constituting a commercial power supply line along with a cable sheath 8', a filter 6, conduction needles 7 and 7' connected with two terminals of the filter 6, respectively, and screws 5 and 5' for pressing the cable clamps 2 and 2' against the phase line or the neutral line. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a filter connector for connecting a filter for preventing high-frequency electromagnetic noise propagating on a commercial power line while preventing leakage of a signal on an unintended transmission line in power line carrier communication.

  In conventional power line carrier communication, power line carrier communication signals are transmitted on a commercial power line in a building. This signal transmission prevents unintentional signal leakage on another power line connected to the commercial power line and drawn from outside the building, and prevents the signal from leaking as electromagnetic noise from the commercial power line. There is a need to. In addition, in order to ensure the security of power line carrier communications and to eliminate the influence on the electromagnetic environment, measures for preventing signal leakage are very important.

  On the other hand, in many electric / electronic devices including home appliances, an inverter-controlled power source is adopted for the purpose of power saving. High frequency electromagnetic noise having various frequency components on the commercial power line is increasing with the increase in the use of such inverter control type power supplies. This high-frequency electromagnetic noise enters from a power supply line or the like, adversely affects the operation of various electric / electronic devices, or has a phenomenon that affects broadcast reception.

As measures for preventing such signal leakage and various effects caused by high-frequency electromagnetic noise, filters are applied to commercial power lines. These filters have a configuration in which a low-pass filter, a high-pass filter, or the like is connected in the middle of the commercial power line. As an example of the filter, as seen in low-pass filters and blocking filters for power line carrier communications, between the inductor (L) connected to the power cable of the commercial power line and the two power cables (phase line and neutral line) It is comprised by the LC resonance circuit comprised by the capacitor | condenser (C) connected to, or the common mode choke inductor etc. which remove the in-phase component of a signal (refer patent document 1, 2).
Japanese Patent Laid-Open No. 5-121988 JP 2003-174349 A

  However, in order to connect the above-mentioned filter to the commercial power line, cut the middle of the power cable of the commercial power line and connect the filter, or prepare a new power cable and connect the filter to the power cable of the commercial power line. Additional work such as reconnection was necessary.

  Further, for safety reasons, it was necessary to cut the contract breaker or the like so that the commercial power supply current does not flow through the power cable connecting the filter, and to perform the work in a dead line state where the power supply was stopped. Therefore, the power supply from the commercial power source could not be received during the filter connection work.

  Further, when the rated current of the commercial power line is large, the inductor constituting the filter circuit to be connected also becomes large and the whole size is increased. For this reason, wiring locations are limited in ordinary homes, and it has been difficult to secure a new location for installing such a large filter other than the existing installation location of the commercial power line.

  The present invention has been made in view of the above problems, and its purpose is to easily connect a filter to a commercial power line without cutting the installed commercial power line and to secure a new installation place for the filter. To make it unnecessary.

  In order to solve the problem, the present invention according to claim 1 is a cable clamp having a filter for a commercial power line, and a circular opening for inserting and holding a phase line and a neutral line of the installed commercial power line. And a needle-like conductive needle that is connected to the filter terminal and protrudes from the contact surface between the phase wire and the neutral wire of the cable clamp, and conducts to each conductor when the phase wire and the neutral wire are gripped. .

  In the present invention, it is connected to a filter for a commercial power line, a cable clamp having a circular opening for inserting and gripping a phase line and a neutral line of the installed commercial power line without cutting, and a filter terminal. And a needle-like conductive needle that protrudes from the contact surface between the phase wire and the neutral wire of the cable clamp and conducts to the respective conductors when gripping the phase wire and the neutral wire. The filter is connected between the phase line and the neutral line without disconnecting the commercial power line.

  According to a second aspect of the present invention, in the first aspect of the present invention, the cable clamp grips the phase line and the neutral line independently, and the length of the missing section provided on the circumference of the circular opening. The circumference can be adjusted by shortening or extending the screw with a screw.

  In the present invention, the phase wire and the neutral wire are respectively grasped independently by the cable clamp, and the peripheral length is adjusted by shortening or extending the length of the defect section provided on the circumference of the circular opening by a screw. The grip is firm.

  According to a third aspect of the present invention, in the first aspect, the cable clamp holds the phase line and the neutral line together, and the length of the defect section provided on the circumference of the circular opening. The circumference can be adjusted by shortening or extending the screw with a screw.

  In the present invention, the combined phase line and neutral line are held together, and the length of the defect section provided on the circumference of the circular opening is shortened or extended with a screw to adjust the circumference. Is solid.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the filter and the cable clamp excluding the conductive needle are covered with an insulator.

  In the present invention, an electric shock is prevented by covering a conductive portion excluding the conductive needle with an insulator.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the filter is configured by any one or a combination of a capacitor, a coil, and an overvoltage protection element.

  In the present invention, the filter is constituted by any one or a combination of a capacitor, a coil, and an overvoltage protection element.

  According to a sixth aspect of the present invention, in any one of the first to fifth aspects, in order to prevent foreign matter from entering a hole due to insertion into a cable sheath around the conductive needle. The foreign substance intrusion prevention means is provided.

  In the present invention, the entry of foreign matter is prevented by closing the gap between the hole created by insertion and the conductive needle with the foreign matter entry prevention means.

  Further, the present invention according to claim 7 is the method according to any one of claims 1 to 6, wherein at least one of color coding, letters, numbers, symbols, and protrusions that enables identification of the filter is provided. Prepare.

  In the present invention, the filter connected to the commercial power line is identified by providing at least one of color coding, letters, numbers, symbols, and protrusions.

  According to the present invention, the filter can be easily connected to the commercial power line without disconnecting the installed commercial power line, and it is not necessary to secure a new installation place for the filter.

  Another advantage of the present invention is that the cable can be easily and firmly held by the cable clamp even if the commercial power supply line is independent of the phase line and the neutral line.

  Another advantage of the present invention is that the commercial power supply line can be easily and firmly gripped by the cable clamp even when the phase line and the neutral line are combined.

  Another effect of the present invention is that it is possible to prevent electric shock and improve safety.

  Another effect of the present invention is that foreign matter can be prevented from entering the conductor inside the cable sheath of the commercial power line.

  Another advantage of the present invention is that the type of filter circuit can be easily identified.

<First Embodiment>
1 and 2 are external views of the filter connector according to the first embodiment. FIG. 1 shows a state in which the filter connector 1 is connected to a commercial power line, and is an outline view seen from the top surface of the commercial power line. On the other hand, FIG. 2 shows an outline view of the filter connector 1 as seen from the section aa ′ in FIG. The commercial power line is composed of a phase line and a neutral line. As an example, FIG. 1 and FIG. 2 show a commercial power line whose internal conductor such as an IV cable (600V vinyl insulated wire) is a single line type.

  As described above, the filter connector 1 shown in FIGS. 1 and 2 includes the cable clamp 2 that holds the conductor 3 of the phase line 4 together with the cable sheath 8, and the conductor 3 ′ of the neutral line 9 similarly to the cable sheath 8 ′. In order to press the cable clamp 2 ′, the filter 6, the conductive needles 7, 7 ′ connected to the two terminals of the filter 6, and the cable clamps 2, 2 ′ to the phase wire 4 and the neutral wire 9. Screw 5 and 5 '.

  The phase line 4 and the neutral line 9 constituting the commercial power line are laid independently of each other, and the cable conductors 8 and 8 ′ cover the conductors 3 and 3 ′ in the respective interiors to ensure insulation. . The phase line 4 and the neutral line 9 are laid and supplied with a commercial power supply current to supply power to various devices (not shown).

  The phase wire 4 and the neutral wire 9 are respectively held by the cable clamps 2 and 2 ′, and the phase wire 4 and the neutral wire 9 are inserted into the cable clamps 2 and 2 ′ as shown in FIGS. It has a circular opening, a defect section is provided on the periphery of this opening, and screws 5 and 5 'pass through the gap.

  Then, by tightening the screws 5 and 5 ′, the diameter of the opening of the cable clamps 2 and 2 ′ is reduced, and the cable clamps 2 and 8 ′ are inserted into the cable sheaths 8 and 8 ′ of the phase wire 4 or the neutral wire 9 inserted therethrough. Since the contact surface of 2 'is in pressure contact, the grip is also strong, and conversely, the opening can be expanded by loosening the screws 5, 5', so that the phase wire 4 and the neutral wire 9 can be easily inserted. .

  Further, conductive needles 7 and 7 'project from the contact surfaces of the cable clamps 2 and 2' with the cable sheaths 8 and 8 '. The conductive needles 7 and 7 'are formed by forming a conductor such as a metal into a sharp needle shape. By tightening the deficient sections of the cable clamps 2 and 2 ′ with screws 5 and 5 ′, the conductive needles 7 and 7 ′ are inserted into the cable sheaths 8 and 8 ′, respectively, and reach the conductors 3 and 3 ′. To do.

  One end of a terminal of a filter 6 composed of a capacitor, a coil, an overvoltage protection element, or the like is connected to the conduction needle 7, and the conductor 3 and one end of the filter 6 are electrically connected. Further, a conductive needle 7 ′ is connected to the other terminal of the filter 6 and is electrically connected to the conductor 3 ′ of the neutral wire 9. In this way, the filter 6 is connected between the conductors 3, 3 'of the phase line 4 and the neutral line 9, respectively.

  The cable clamps 2, 2 'and the filter 6 are collectively covered with a non-conductive insulating material as shown in FIGS. For this reason, even when the conductive needles 7 and 7 ′ and the filter 6 are energized, no electric shock or the like due to external contact occurs. The insulation material applied here may be molded to include the cable clamps 2, 2 ′ and the filter 6 by using plastic or the like. Further, identification by color coding or shape projection, or letters, numbers, symbols, etc. are used. Identification notation may be given to the filter connector 1.

  Furthermore, by providing a foreign matter mixing prevention means (not shown) in the vicinity of the conductive needles 7 and 7 ', moisture and water can be removed from the gap between the conductive needles 7 and 7' when the conductive needles 7 and 7 'are inserted into the cable sheaths 8 and 8'. Prevent foreign material such as dust from entering. As this foreign matter mixing prevention means, an adhesive sealant or the like is attached in advance to the root portions of the conductive needles 7 and 7 ′, so that the inserted conductive needles 7 and 7 ′ and the holes associated with the insertion are provided. The gap is closed.

  According to the above-described first embodiment, the filter can be easily connected to the commercial power line without cutting the installed commercial power line, and it is not necessary to secure a new installation place for the filter.

  Further, even if the commercial power supply line is configured to be independent of the phase line and the neutral line, it can be easily and firmly held by the cable clamp, and it is possible to prevent an electric shock and improve safety.

  Furthermore, it is possible to prevent foreign matter from entering the conductor inside the cable sheath of the commercial power line, and the type of the filter circuit can be easily identified.

<Second Embodiment>
The second embodiment differs from the first embodiment in that the commercial power line 16 gripped by the cable clamp 10 is a VVF cable (600 V vinyl insulated vinyl sheath cable flat wire). The VVF cable holds an independent phase wire 15 and neutral wire 17 inside. As shown in FIG. 3, the phase wire 15 has a conductor 14 coated with a cable sheath 13 and another neutral wire 17. The inner conductor 14 'is covered with a cable sheath 13'. The phase wire 15 and the neutral wire 17 are collected together and covered with the cable sheath 16.

  3 and 4 show an outline view of the filter connector 1 according to the second embodiment, and FIG. 3 shows an outline view of the state where the filter connector 1 is connected to the commercial power line as viewed from above. ing. On the other hand, FIG. 4 shows an outline view of the filter connector 1 as seen from the b-b ′ cross section of FIG. 3.

  The filter connector 1 shown in FIGS. 3 and 4 includes a cable clamp 10 that holds the commercial power line 16, a filter 11, and conductive needles 12 and 12 ′ connected to two terminals of the filter 11, respectively. The cable clamp 10 is constituted by a screw 5 for press-contacting the cable clamp 10 to the commercial power line.

  In the second embodiment, by tightening the screw 5 included in the cable clamp 10, the interval between the defect sections provided on the periphery of the substantially elliptical opening of the cable clamp 10 is narrowed, and the opening is contracted. The inner surface (contact surface) and the jacket of the commercial power supply line 16 are firmly pressed and fixed.

  As the cable clamp 10 is pressed against the outer sheath of the commercial power line 16, the two conductive needles 12 and 12 'are inserted into the outer sheath of the commercial power line 16 and also into the cable sheaths 13 and 13'. Insert and contact the inner conductor 14 and the inner conductor 14 ', respectively. The two terminals of the filter 11 are brought into contact with the inner conductors 14 and 14 ′ through the conductive needles 12 and 12 ′ to be conductive, thereby connecting the filter 11 to the phase line 15 and the neutral line 17.

  According to the above-described second embodiment, even if the commercial power supply line has a configuration in which both the phase line and the neutral line are combined, gripping by the cable clamp can be easily and firmly performed.

FIG. 5 shows an equivalent circuit diagram of a combination of the filter connector 1 formed in the first and second embodiments and the commercial power line. A range indicated by a broken line in FIG. 5 indicates the filter circuit 23, and E20 indicates a power line carrier communication signal generator superimposed on the power transmission source of the commercial power source or the commercial power source line. C22 shown in the filter 23 indicates a capacitor used for the filter. Z _L 21 is the impedance of the load with respect to the commercial power line, I in the figure indicates the current input to the filter circuit 23, and I ′ indicates the current flowing through Z _L 21.

Next, the characteristic diagram of current ratio (dB) versus frequency (Frequency: Hz) shown in FIG. 6 shows the current ratio (I / I) when C22 is 1 μF and Z _L 21 is 100Ω in the equivalent circuit shown in FIG. ') Represents the calculation result.

In the characteristic diagram shown in FIG. 6, I ′ flowing through Z _L 21 at a frequency of 1 to 30 MHz is attenuated by 50 dB or more with respect to the current I input to C22. In power line carrier communication, a connection loss characteristic of 40 dB or more is required at a frequency of 1 to 30 MHz in order to prevent leakage of the communication. Therefore, a filter circuit for preventing signal leakage for power line carrier communication can be obtained by using capacitors having a capacitance of 1 μF for the filters 6 and 11 of the filter connector 1 described in the first and second embodiments. Easy to configure.

The external view which looked at the filter connector of 1st Embodiment from the upper surface is shown. The external view which looked at the filter connector of 1st Embodiment from the a-a 'cross section in FIG. 1 is shown. The external view which looked at the filter connector of 2nd Embodiment from the upper surface is shown. The external view which looked at the filter connector of 2nd Embodiment from the b-b 'cross section in FIG. 3 is shown. The equivalent circuit diagram of the filter circuit formed by the filter connector of 1st and 2nd embodiment and a commercial power supply line is shown. The characteristic view of the filter circuit formed by the filter connector and commercial power supply line of 1st and 2nd embodiment is shown.

Explanation of symbols

1 Filter connector 2, 2 'Cable clamp 5, 5' Screw 6, 11 Filter 7, 7 ', 12, 12' Conductive needle

Claims (7)

A filter for commercial power lines,
A cable clamp having a circular opening for inserting and gripping the phase line and neutral line of the laid commercial power line; and
Needle-like conductive needles that are connected to the terminals of the filter and project from the contact surface between the phase line and the neutral line of the cable clamp, and are conducted to the respective conductors when gripping the phase line and the neutral line,
A filter connector comprising: The cable clamp is
2. The phase line and the neutral line can be independently gripped, and the peripheral length can be adjusted by shortening or extending the length of the defect section provided on the periphery of the circular opening with a screw. The filter connector as described in 1. The cable clamp is
The phase line and the neutral line are held together, and the peripheral length can be adjusted by shortening or extending the length of the defect section provided on the periphery of the circular opening with a screw. The filter connector as described in 1. The filter connector according to any one of claims 1 to 3, wherein the filter excluding the conductive needle and the cable clamp are covered with an insulator. The filter connector according to any one of claims 1 to 4, wherein the filter is configured by any one or a combination of a capacitor, a coil, and an overvoltage protection element. 6. The foreign matter intrusion prevention means for preventing foreign matter from entering a hole due to insertion into a cable sheath around the conductive needle is provided. Filter connector. The filter connector according to any one of claims 1 to 6, comprising at least one of color coding, letters, numerals, symbols, and protrusions that enables identification of the filter.

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