JP2006112799A - Watt-hour meter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a watt-hour meter for safely performing replacement work, etc. without spending a cost by realizing a connection terminal block for attaching/detaching electric wires without causing them to short-circuit. <P>SOLUTION: This watt-hour meter 10 is provided with the connection terminal block 12. In the terminal block 12, input terminals 21 to 23, as rod-like male-type connection terminals, are structured so that female-type connection terminals 30 can be connected thereto, the terminals 30 connected to conductive wires 120m at tip ends of input electric wires 121 to 123. Output terminals 25 to 27, as female-type connection terminals equipped with insertion parts 13, are structured so that the conductive wires 120m can be connected thereto, the conductive wires 120m serving as male-type connection terminals at tip ends of output electric wires 125 to 127. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a watt hour meter, for example, by replacing the watt hour meter by removing the wire from the commercial power source side and the load device side without causing an accident that the wires come into contact with each other and short-circuit. It relates to things that allow work to be performed safely.

  Conventionally, when connecting a power line to a device (load device), it is common to prepare and connect a plurality of connection terminals for each power line. For example, in order to charge according to the amount of power supplied from the commercial power supply side, as shown in FIG. 3, the watt-hour meter 100 connected to each terminal of the power supply line consumes the power supplied from the commercial power supply. It is installed in each door (each household) equipped with a load device.

  The watt-hour meter 100 connects the main body 101 that integrates (measures) the supplied power used and the electric wire so that the main body 101 is interposed in the middle of the electric wire between the commercial power supply and the load device of each door. The connection terminal block 102 is arranged. In the watt-hour meter 100, the cover 103 covers the connection terminal block 102 so as not to touch it inadvertently. By removing the cover 103, as shown in FIG. The input terminals 111 to 113 that connect the power supply line) to the main body 101 and the output terminals 115 to 117 that connect the output wires to the breaker on the load device side to the main body 101 can be exposed. The connection terminal block 102 is designed so that, for example, the watt-hour meter 100 can be replaced by connecting or disconnecting wires to the terminals 111 to 113 and 115 to 117.

  As shown in FIG. 5, such a watt-hour meter 100 connects the conductive wire 120 m from which the coating 120 c on the distal end side of the electric wire 120 is peeled off to the terminals 111 to 113 and 115 to 117 of the connection terminal block 102 with screws 119. However, when the watt-hour meter 100 is removed, in particular, if the conductive wires 120c of the input wires 121 to 123 are brought into contact with each other, a short circuit accident occurs, which is dangerous. For this reason, a work standard is set so that work can be performed without causing a short circuit accident. Here, FIG. 5 simply illustrates the connection terminal block 102 shown in FIG.

Moreover, as such a watt-hour meter 100, a connector can be attached or detached to the terminals 111-113, 115-117 of the connection terminal block 102, and the input electric wires 121-123 and the output electric wires 125-127 are connected to this connector. Thus, it has been proposed to be able to safely replace the watt hour meter 100 without causing a short circuit accident between the electric wires 120 (see, for example, Patent Document 1).
JP 2003-248020 A

  However, in such a conventional watt-hour meter, although the working standard has been decided, the electric wire connected to the watt-hour meter has become larger with the recent electrification (the wire diameter is reduced). It has become impossible to perform operations such as individually lowering the electric wires to be attached to and detached from the watt hour meter and winding the insulating tape.

  Moreover, in the watt-hour meter described in the above-mentioned document 1, it is expensive to install a connector for each watt-hour meter only for the replacement work of the watt-hour meter that is not frequently performed. In addition, there is a problem that when the watt-hour meter is replaced depending on the power situation, the connector must be replaced, which increases the cost.

  Then, this invention implement | achieves the structure which can be attached or detached without short-circuiting an electric wire, and aims at providing the watt-hour meter which can perform replacement | exchange work etc. safely without incurring cost. .

  1st invention of the watt-hour meter which solves the said subject is an watt-hour meter which measures the electric energy supplied from a commercial power source, Comprising: The input terminal which connects the input wire from the commercial power source side is this input wire It is set to the male type which can connect the female type | mold connection terminal connected to the front-end | tip of this.

  In the present invention, a female connection terminal is attached to the conductive wire at the tip of the input electric wire from which the coating has been removed in order to connect to the male input terminal. Therefore, when the input electric wire is inserted into or pulled out from the input terminal, a female connection terminal is interposed between the tips of the input electric wire without bringing the conductive wires close to each other. And can be pulled out of the input terminal and removed. Here, since the input wire is charged because it is on the commercial power supply side, it is necessary to be careful not to cause a short-circuit accident by bringing the conductive wires at the tip into contact with each other. Therefore, it is possible to work without causing a short circuit accident.

  In addition to the specific matters of the first invention, the second invention of the watt-hour meter that solves the above-mentioned problem is capable of plugging and connecting the tip of the output cable to the output terminal that connects the output cable to the power consuming side. And a means for connecting the output electric wire inserted into the conductor portion to the conductor portion.

  In this invention, in order to connect the front-end | tip of an output electric wire to a female type | mold output terminal, a male type | mold may be peeled off and it may only peel and expose a conductive wire. Therefore, the output electric wire can be connected by inserting the conductive wire at the tip into the female output terminal, and can be pulled out from the output terminal and removed. Here, since the output electric wire is on the load device side that consumes electric power, it does not charge up, and even if the conductive wires at the tip thereof are brought into contact with each other, there is no short circuit accident.

  In addition to the specific matters of the first or second invention, the third invention of the watt-hour meter that solves the above-described problems includes the input terminal and an output terminal that connects an output wire to the power consumption side, respectively. A plurality of terminals are provided, and the terminals are arranged at positions shifted in the direction of inserting or extracting the electric wires to be connected.

  In the present invention, the length of the conductive wire of the input electric wire and the output electric wire from which the coating of the tip connected to the input terminal and the output terminal is removed is shifted back and forth. Therefore, even if the input and output wires are inserted into or pulled out from the input and output terminals, even if the female terminal at the tip of the input wire is disconnected, keep the conductive wires at the tips close to each other. There is no end.

  In addition to the specific matters of the third invention, the fourth invention of the watt-hour meter that solves the above-mentioned problems is arranged such that the input terminal and the output terminal are arranged at adjacent positions separated separately, and the outer side is closer to the outer side. It is characterized by being arranged in a V shape that is closer to the main body part and is separated from the main body part toward the boundary side.

  In this invention, the input wire and the output wire are separated, and the conductive wire at the tip thereof is displaced in the longitudinal direction, and a large working space is formed laterally outside the input terminal and the output terminal. Can be secured. Therefore, the operation | work which connects an input electric wire and an output electric wire to an input terminal or an output terminal can be performed easily.

  Here, the output terminal is not limited to a female terminal, and may be set to a male terminal as in the case of the input terminal. However, the number of female terminals connected to the electric wire increases and the cost increases. At the same time, by making the output terminal a female terminal, it is easy to distinguish it from the input terminal and workability can be improved. Therefore, it is preferable to set the output terminal to a female terminal.

  According to the present invention, since the input terminal is set to a female type, when the input electric wire is inserted into or pulled out from the input terminal, the conductive wires are brought close to each other without being short-circuited. Removal work can be performed. Therefore, it is possible to provide a watt-hour meter that can be safely replaced with a simple configuration in which the input terminal is a male type at a low cost.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, the best embodiment of the invention will be described with reference to the drawings. FIG. 1 is a diagram showing a first embodiment of a watt-hour meter according to the present invention.

  In FIG. 1, the watt-hour meter 10 is installed in the front stage of the breaker of each door (each household), for example, similarly to the prior art shown in FIGS. (Connection terminal part) 12.

  The main body 11 intervenes in the middle of the electric wire 120 that supplies electric power from a commercial power source to household appliances (load devices) in each home, and integrates (measures) the power used. The input terminals 21 to 23 and the output terminals 25 to 25 are connected so that the main body 11 is electrically interposed between the input electric wires (power lines) 121 to 123 from the commercial power source and the output electric wires 125 to 127 to the breaker. 27.

  Here, since the input electric wires 121 to 123 and the output electric wires 125 to 127 are electric wires that supply electric power from a commercial power source to each door, the input electric wires 121 and the output electric wires 125 and the input electric wires are provided inside the main body 11. 122, the output electric wire 126, the input electric wire 123, and the output electric wire 127 are connected by a conduction circuit so as to be able to supply electric power, and a current of the same potential flows. As in FIG. 5, FIG. 1 simply shows the watt-hour meter 10 deformed, and may be a conventional analog-type watt-hour meter, and the main body 11 can be designed in a compact manner. It can also be applied to digital watt-hour meters. The same applies to other embodiments described later with reference to FIG.

  And the output terminals 25-27 are formed in a cylindrical shape so that the electric wire 120 can be inserted from below (the lower side of FIG. A plurality of block-shaped insulating materials (for example, hard resin materials) are juxtaposed in parallel and constructed as female connection terminals, and connection electrodes (not shown) made of a conductive material on at least the back side in the insertion portion 13 ( A conductor portion) is provided, and a male screw (connecting means) 29 that is threaded through and threaded from the front side of the connection terminal block 12 is disposed.

  That is, in the output terminals 25 to 27, the conductive wire 120 m that is the core wire of the electric wire 120 with the coating 120 c on the distal end side is inserted into the insertion portion 13 as a male connection terminal, and a male screw is connected to the internal connection electrode. The output wires 125 to 127 can be electrically connected by being screwed so as to be pressed by 29.

  The output terminals 25 to 27 are designed such that the insertion part 13 is arranged on the right side of the main body part 11 to connect the output electric wires 125 to 127, and the center of the main body part 11 with respect to the input terminals 21 to 23. By adjoining the vicinity as the boundary position 12a, the input side and the output side are separated separately.

  On the other hand, the input terminals 21 to 23 of the present embodiment are attached as rod-shaped male connection terminals (conductor portions) attached so as to extend downward while floating from the rear side wall surface of the connection terminal block 12. Contrary to the output terminals 25 to 27, the input terminals 121 to 123 are constructed so that they can be inserted into the insertion portions 33 of the connection terminals 30 which will be described later.

  The connection terminal 30 is a connection electrode (conductor portion) (not shown) formed in a cylindrical shape made of a conductive material in an insertion portion 33 formed in an insulating material in a cylindrical shape (sleeve shape) and opened on both ends. Is installed in a female shape that can insert the input terminals 21 to 23 from one end side and the conductive wires 120m at the tips of the input wires 121 to 123 from the other end side.

  The connection terminal 30 is provided with a male screw 29 penetrating from the front surface side of the connection terminal block 12 on the insertion side of the input terminals 21 to 23, while the front ends of the input wires 121 to 123. Similarly to the so-called crimp terminal, the insertion side of the conductive wire 120m is configured to be deformable by a crimping tool. Therefore, the exterior portion of the connection terminal 30 is made of a soft insulating resin material that can be easily plastically deformed. The connection terminal 30 is made of a hard insulating resin material so as not to be deformed, and a connection electrode (not shown) made of a conductive material is continuously provided in the insertion portion 33 from one end side to the other end side on the back side. Needless to say, the male screw 29 may be disposed on both the one end side and the other end side.

  That is, the input terminals 21 to 23 are inserted into the one end side insertion portion 33 of the connection terminal 30 that is crimp-connected to the conductive wires 120 m at the tips of the input wires 121 to 123 and are pressed against the internal connection electrodes by the male screws 29. The input wires 121 to 123 can be conductively connected to each other by screwing them.

  Thereby, the watt-hour meter 10 is connected to the input terminals 21 to 23 because the input wires 121 to 123 in which the connection terminals 30 whose exterior portions are insulative are attached to the leading conductive wires 120m are connected to the input terminals 21 to 23, for example. When the watt hour meter 10 is replaced, even if the electric wire 120 is pulled out by loosening the screw 29 and lifting the watt hour meter 10, the conductive wires 120 m of the input wires 121 to 123 of the electric wire 120 are connected to each other. Will not touch. Therefore, this watt-hour meter 10 is connected to the input terminals 21 to 23 of the connection terminal block 12 without causing a short circuit accident in which the conductive wires 120m of the input wires 121 to 123 charged on the commercial power source side are brought into contact with each other. The connection terminal 30 connected to the conductive wire 120m of the input electric wires 121 to 123 can be removed and inserted at the same time to perform an exchange operation or the like.

  Here, since the output wires 125 to 127 are connected to the load device side that consumes electric power and are not charged up, even if the conductive wires 120 m come into contact with each other, there is no short circuit accident. Since the connection terminals 30 are connected to the conductive wires 120m at the tips of the electric wires 121 to 123, there is no direct connection to the output electric wires 125 to 127, and no power is supplied to the load device side.

  An insulating cover 34 is also detachably attached to the connection terminal block 12 of the watt-hour meter 10 so as not to touch it carelessly.

  Thus, in this embodiment, since the female connection terminal 30 is attached to the conductive wires 120m at the tips of the input wires 121 to 123 and connected to the male input terminals 21 to 23 of the connection terminal block 12, for example, When exchanging the watt-hour meter 10, the conductive wires 120m of the input wires 121 to 123 are not particularly contacted or short-circuited. Therefore, the watt-hour meter 10 can be safely exchanged with a simple and inexpensive configuration in which the input terminals 21 to 23 and the males and females of the input wires 121 to 123 are replaced.

  As another form of the present embodiment, the male and female of the input side connection structure are replaced in the present embodiment, but the present invention is not limited to this, and it goes without saying that the same connection structure may be used on the output terminal side. Absent. However, since the number of connection terminals 30 connected to the electric wire 120 side increases and the cost increases, it is easy to distinguish the connection type between the input side and the output side, and the workability can be improved. It is preferable to configure as in the embodiment.

  Next, FIG. 2 is a figure which shows 2nd Embodiment of the watt-hour meter which concerns on this invention. In addition, since this embodiment is comprised substantially the same as the said 1st Embodiment, the same code | symbol is attached | subjected to the same structure and a characteristic part is demonstrated.

  In FIG. 2, the watt-hour meter 50 includes a main body 11 and a connection terminal block 12, and the connection terminal block 12 includes input terminals 61 to 63 for connecting input wires 121 to 123 on the left side of the main body 11. And the output terminals 65 to 67 for connecting the output wires 125 to 127 are arranged on the right side of the main body 11 so that the input side and the output side are separated from each other about the adjacent boundary position 12a. It is partitioned.

  The input terminals 61 to 63 and the output terminals 65 to 67 are configured in the same manner as in the above embodiment, and the input terminals 61 to 63 are inserted into the insertion portion 33 of the connection terminal 30 and screwed with the male screw 29. By doing so, the input wires 121 to 123 can be electrically connected, and the output terminals 65 to 67 are inserted with the conductive wires 120 m at the tips of the output wires 125 to 127 into the insertion portion 13 and screwed with the male screws 29. By doing so, the output electric wires 125 to 127 can be electrically connected.

  And the input terminals 61-63 and the output terminals 65-67 of this embodiment are the input electric wires at least in the direction which inserts / extracts the electric wires 121-123, 125-127 in the insertion parts 13 and 33 for each of these terminals. The connection terminals 30 at the tips of 121 to 123 and the conductive wires 120 m at the tips of the output wires 125 to 127 are arranged at positions shifted by more than the length (height). Further, the input terminals 61 to 63 and the output terminals 65 to 67 are positioned on the upper side closer to the main body part 11 as they are separated from the center boundary position 12a, and the main body part 11 is closer to the boundary position 12a. It is located in the lower part which is separated from, and it is arranged in the V shape where the side is opened to the outside when viewed from the front.

  Thereby, since the electric wire 120 to connect connects the length with the arrangement | sequence of the input terminals 61-63 and the output terminals 65-67, the watt-hour meter 50 is the length (electric wire 120 of the insertion part 13 and 33). Input wires 121 to 123 and output wires 125 to 127 having different connecting terminals 30 and conductive wires 120m at the tip) are connected. Therefore, for example, when the watt hour meter 50 is replaced, when the electric wire 120 is pulled out by loosening the male screw 29 and lifting the watt hour meter 50, the input wires 121 to 123 are temporarily assumed. Even if the connecting terminal 30 at the tip is detached and the conductive wire 120m is exposed, the conductive wires 120m are not in contact with each other. Therefore, this watt-hour meter 50 has the input terminals 21 to 23 of the connection terminal block 12 connected without causing a short circuit accident that causes the conductive wires 120m of the input wires 121 to 123 charged on the commercial power source side to contact each other. An exchange operation or the like can be performed by inserting / removing the plug into / from the insertion portion 33 of the connection terminal 30 at the tip of the input wires 121 to 123.

  Moreover, since the input terminals 61-63 and the output terminals 65-67 of this watt-hour meter 50 are arranged in the V-shape by which the side surface side is open | released outward, it is close to the connection terminal block 12. The position of the electric wire 120 can be adjusted and positioned in a wide working space, and then the watt hour meter 50 can be relatively moved to be inserted into the insertion portions 13 and 33 and screwed. Therefore, this watt-hour meter 50 has the input wires 121 to 123 and the output to the input terminals 61 to 63 and the output terminals 65 to 67 of the connection terminal block 12 without making the connection work of the wires 120 more complicated than before. Electric wires 125-127 can be connected.

  An insulating cover 54 is also detachably attached to the connection terminal block 12 of the watt-hour meter 50 so as not to touch it carelessly.

  Thus, in this embodiment, in addition to the effect by the above-mentioned embodiment, the input terminal 61-63 and the output terminal 65-67 of the connection terminal block 12 are shifted in the length direction of the electric wire 120, and the electric wire connected Since the positions of the connection terminal 30 and the conductive wire 120m at the front end of 120 are also shifted in the length direction, for example, when replacing the watt hour meter 50, the conductive wires 120m of the input wires 121 to 123 are particularly in contact with each other.・ There is no short circuit. Therefore, the watt-hour meter 50 can be safely replaced with a simple and inexpensive configuration in which the terminals 61 to 63 and 65 to 67 of the connection terminal block 12 are simply shifted in the length direction of the electric wire 120.

  Although one embodiment of the present invention has been described so far, it is needless to say that the present invention is not limited to the above-described embodiment, and may be implemented in various forms within the scope of the technical idea.

It is a figure which shows 1st Embodiment of the watt-hour meter which concerns on this invention, and is a conceptual front view which shows the schematic whole structure. It is a figure which shows 2nd Embodiment of the watt-hour meter which concerns on this invention, and is a conceptual front view which shows the schematic whole structure. It is a figure which shows the prior art, (a) is the front view, (b) is the right view. It is a disassembled front view which shows the principal part of the prior art. It is a conceptual front view explaining the subject of the prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10, 50 Electricity meter 11 Main-body part 12 Connection terminal block 12a Boundary position 13, 33 Plug-in parts 21-23, 61-63 Input terminal 25-27, 65-67 Output terminal 29 Male screw 30 Connection terminal 34, 54 Insulation cover 120 Wire 120m Conductive wire 121-123 Input wire 125-127 Output wire

Claims (4)

An energy meter that measures the amount of power supplied from a commercial power source,
An watt-hour meter characterized in that an input terminal for connecting an input electric wire from a commercial power source side is set to a male type capable of connecting a female connection terminal connected to the tip of the input electric wire.   The output terminal for connecting the output wire to the power consuming side is set to a female type in which the tip of the output wire can be inserted and connected, and has means for connecting the output wire inserted inside to the conductor portion The watt-hour meter according to claim 1. A plurality of the input terminals and output terminals for connecting output wires to the power consuming side, respectively,
The watt hour meter according to claim 1 or 2, wherein the terminal is arranged at a position shifted in a direction in which an electric wire to be connected is inserted or pulled out.   The input terminal and the output terminal are arranged at adjacent positions separated separately, and are arranged in a V-shape that is closer to the main body portion as it is on the outer side and further away from the main body portion as it is on the boundary side. The watt-hour meter according to claim 3.

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