JP4703285B2 - Uninterruptible tool - Google Patents

Description

  The present invention relates to an uninterruptible tool used for short-circuiting a power-side electric wire and a load-side electric wire connected to an instrument such as a watt-hour meter for a low-voltage consumer to replace the instrument uninterruptibly. About.

  An example of a conventional uninterruptible tool will be described with reference to the drawings. 6A and 6B are external views of a conventional uninterruptible tool. FIG. 6A is a front view, FIG. 6B is a plan view, FIG. 6C is a right side view, and FIG. FIG. FIG. 7 is an explanatory view for explaining the connection state of the uninterruptible tool to the instrument, FIG. 7 (a) is a front view of the connection state, and FIG. 7 (b) is a right side view of the connection state. FIGS. 6 and 7 show a state in which the uninterruptible tool 400 is connected to the electric wire 100 in order to remove the instrument 200.

As shown in detail in FIGS. 6A and 6B, the electric wire 100 is connected to a power source side electric wire 101 called 1S and 2S connected to a power source (not shown) and a load (not shown). The load side electric wires 102 of 1L and 2L are collectively referred to.
There are various types of meters 200. For example, as shown in FIGS. 7A and 7B, an integrated watt-hour meter attached to a general house is used. An instrument 200 such as an integrated watt-hour meter is usually housed in an instrument box 300 in order to protect it from wind and rain.

  Next, the uninterruptible tool 400 will be described. As shown in FIG. 6, the uninterruptible tool 400 includes a main body 401, a fixing base 402, a fastening screw 403, a push-off screw 404, a display unit 405, and a switch 406.

The main body 401 is a resin molded product, for example, and a connection conductor (not shown) forming a bypass circuit is embedded therein. The main body 401 is provided with a female screw portion into which a push-off screw 404 is screwed. Further, as shown in FIGS. 6B and 6D, the main body 401 is formed with a groove for arranging the power supply side electric wire 101 and the load side electric wire 102. By this groove, the power supply side electric wire 101 and the load side electric wire 102 are arranged and guided at predetermined positions.
The fixing base 402 is formed in a plate shape, for example, with a resin molded product, and as shown in FIGS. 6B and 6D, a groove for arranging the power-side electric wire 101 and the load-side electric wire 102 is formed. . By this groove, the power supply side electric wire 101 and the load side electric wire 102 are arranged and guided at predetermined positions.

The fastening screw 403 is inserted into an insertion hole formed in the main body 401 and is screwed into the fixing base 402. When the fastening screw 403 is tightened, the main body 401 and the fixing base 402 are connected to the power-side electric wire 101. The load side electric wire 102 is fastened and fixed in a sandwiched state.
Since the push-off screw 404 is provided inside the main body 401 and is screwed into the threaded portion, the insulation coating of the power-side electric wire 101 and the load-side electric wire 102 is pushed through and both the electric wires are short-circuited. An electrical connection is made with a provided connection conductor (not shown) to form a bypass circuit.

The display unit 405 is, for example, a lamp. When the 1S-1L of the bypass circuit is electrically connected, the display unit 405 is electrically connected between the 2S-2L of the bypass circuit. And a lamp for displaying.
The switch 406 is configured to turn on and off the above two systems of lamps. When the connection between the power supply side wire 101 and the load side wire 102 is made between 1S-1L and 2S-2L, the switch 406 is turned on. When turned on, both display lamps 405 are lit and blinking, so that it is possible to confirm whether or not the connection is possible.

Next, an outline of instrument replacement using the uninterruptible tool 400 will be described.
The power supply side electric wire 101 and the load side electric wire 102 connected to the meter 200 to be exchanged are sandwiched between the fixing base 402 and the main body 401, and the covering is cut off by the push-off screw 404 to form a bypass circuit. Subsequently, when the switch 406 is turned on, both the display unit 405 is lit and blinked when the power supply side wire 101 and the load side wire 102 are connected, and it can be confirmed that the bypass circuit is formed by the connection. In this state, the invalidated meter 200 is removed, and a newly verified meter 200 is installed. As a result, the load side can be replaced without a power failure.
The uninterruptible tool 400 is like this.

  Such conventional uninterruptible tools are also disclosed in Patent Document 1 (Japanese Patent No. 3392824), Patent Document 2 (Japanese Patent No. 2648906), and the like.

Japanese Patent No. 3392824 Japanese Patent No. 2648906

Of the conventional meter 200, the watt hour meter (WHM) is often stored and installed in a space where there is not much room, such as a cubicle or a meter box. It may not be possible to deal with or work efficiency may be significantly reduced.
For example, a meter 200 such as a watt hour meter (WHM) as shown in FIGS. 7A and 7B is housed in a meter box 300, but is housed in such a meter box 300. When the meter 200 is replaced, the uninterruptible power tool 400 of the prior art has a vertically long shape as shown in FIG. 6, so that it does not fit in the meter box 300 as shown in FIG. 7. Therefore, there was a problem that it was difficult to replace the meter 200. Thus, the development of an uninterruptible tool that can be attached to a cubicle (not shown) in which the uninterruptible tool 400 is difficult to attach and the instrument 200 accommodated in the instrument box 300 has been demanded.

  Therefore, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide an uninterruptible tool that can be connected to an instrument housed in a narrow accommodation space. It is in.

The uninterruptible tool according to claim 1 of the present invention is:
Since it is provided in the main body and is fixed to the power supply side wire and load side wire connected to the instrument, by screwing a push-off screw into the threaded portion, these power supply side wire and load-side wire are connected via the push-off screw. A push-off section that short-circuits each other to form a bypass circuit;
A female connector having a connector electrically connected to the bypass circuit and an operation panel including a display unit for indicating that the bypass circuit has been connected; By inserting this connector, the display part of the operation panel displays that the screw head of the push-off part and the connector of the connection confirmation part are electrically connected. A connection confirmation unit for informing whether or not connection with
With
This connection confirmation part is electrically connected to the screw head of the push-off screw of the push-off part, and is characterized by notifying whether or not the power supply side electric wire and the load side electric wire can be connected.

An uninterruptible tool according to claim 2 of the present invention is
In the uninterruptible tool according to claim 1,
Connector of the connect confirmation unit is is applied biasing force by the elastic unit, it is electrically connected in a state in which the connectors and the screw head of the press-cutting screws in close contact, characterized in Rukoto.

An uninterruptible tool according to claim 3 of the present invention is
In the uninterruptible tool according to claim 1 or 2,
When the cut-off part is attached to the power-side cable and load-side cable that are wired in the vertical direction, the female thread of the push-off part is approximately perpendicular to the power-side cable and load-side cable and is elongation central axis, also the operation panel is characterized that you located on the front face when the connectors of the connect confirmation unit is inserted into the female screw portion of the press-cutting portion.

  ADVANTAGE OF THE INVENTION According to this invention, the uninterruptible tool which enabled it to connect also with the meter accommodated in the narrow accommodation space can be provided.

The best mode for carrying out the uninterruptible tool of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view of an uninterruptible tool according to the present embodiment. FIG. 1 (a) is a front view of the use state, and FIG. 1 (b) is a side view of the use state. FIG. 2 is a plan view of the usage state of the uninterruptible tool of the present embodiment.
Next, the uninterruptible tool 1 will be described. FIGS. 1A and 1B show a state in which the uninterruptible tool 1 (specifically, only the push-off portion 10) is connected to the electric wire 100 in order to remove the instrument 200. FIG.

The electric wire 100 is a generic term for a power supply side electric wire 101 called 1S and 2S connected to a power source (not shown) and a load side electric wire 102 called 1L and 2L connected to a load (not shown). It is.
There are various types of meters 200, for example, an integrated watt-hour meter attached to a general house.
The instrument box 300 is provided to protect the instrument 200 from the outside world.
In order to remove such an instrument 200, the uninterruptible tool 1 is used.

  As shown in FIG. 1, the uninterruptible tool 1 includes a push-off unit 10 and a connection confirmation unit 20. Note that the push-off portion 10 and the connection confirmation portion 20 are normally separated, and the push-cut portion 10 is fixed to the electric wire 100 as a single unit to form a bypass circuit. Whether the bypass circuit is formed or not. Only when the connection is confirmed, the connection confirmation unit 20 is connected to the push-off unit 10 as shown in FIG. The replacement method will be described later.

  First, details of the uninterruptible tool 1 will be described with reference to the drawings. FIG. 3 is an external view of the cut-off portion of the uninterruptible tool of the present embodiment, FIG. 3 (a) is a front view, FIG. 3 (b) is a plan view, FIG. 3 (c) is a right side view, and FIG. d) is a bottom view. 4A and 4B are external views of the connection confirmation unit of the uninterruptible tool according to the present embodiment. FIG. 4A is a plan view and FIG. 4B is a front view.

  As shown in detail in FIG. 3, the push-cut portion 10 includes a main body 11, a fixing base 12, a fastening screw 13, and a push-cut screw 14.

  The main body 11 is, for example, a resin molded product, and a connection conductor (not shown) that forms a bypass circuit is embedded therein. Inside the main body 11, as shown in FIG. 2, four internal thread portions 111 to which the push-off screw 14 is screwed are provided. Further, as shown in FIGS. 3B and 3D, a circular groove 112 in which the power supply side electric wire 101 and the load side electric wire 102 are arranged is formed. By this circular groove 112, the power supply side electric wire 101 and the load side electric wire 102 are arranged and guided at predetermined positions.

  The fixed base 12 is formed, for example, in a plate shape with a resin molded product, and as shown in FIGS. 3B and 3D, a V-groove 121 for arranging the power-side electric wire 101 and the load-side electric wire 102 is formed. ing. The power supply side electric wire 101 and the load side electric wire 102 are arranged and guided at predetermined positions by the V groove 121. For example, as shown in FIG. 2, it is fixed in the circular groove 112 of the main body 11 and the V groove 121 of the fixing base 12. At the time of pushing, it enters into the V groove 121 of the fixing base 12 and is fixed securely.

  The fastening screw 13 is inserted into an insertion hole (not shown) formed in the main body 11 and screwed into the fixing base 12. When the fastening screw 13 is tightened, the main body 11 and the fixing base 12 are connected. The power supply side electric wire 101 and the load side electric wire 102 are clamped and fixed.

The push-off screw 14 is provided inside the main body 11, pushes through the insulation coating between the power-side electric wire 101 and the load-side electric wire 102, short-circuits both electric wires, and a connecting conductor (not shown) provided inside the main body 11. To establish a bypass circuit.
The push-cut unit 10 is configured in this way.

As shown in FIG. 4, the connection confirmation unit 20 includes a main body 21, a shaft 22, a connector 23, a spring 24 that is a specific example of an elastic body, a display unit 25, a power switch 26, an operation panel 27, and the like. It is equipped with.
The main body 21 is a case in which an internal circuit is accommodated. This internal circuit is connected to the display unit 25.
The shaft 22 protrudes from the main body 21. The shaft 22 is electrically connected to an internal circuit in the main body 21.
The connector 23 is pivotally supported by the shaft 22 and can move in the direction of arrow A. Further, it is electrically connected to the shaft 22.

The spring 24 is inserted between the connector 22 and the main body 21 while the shaft 22 is inserted in the center, and urges the connector 23 outward. Instead of the spring 24, a rubber body, which is another example of an elastic body, may be employed.
The display unit 25 is, for example, a display lamp, an LED element, and the like. The 1S-1L display unit that displays when 1S-1L of the bypass circuit is electrically connected, and 2S-2L of the bypass circuit are also used. A 2S-2L display unit that displays when the space is electrically connected. The display unit 25 is lit and blinks when the electric wire 100 and the internal circuit are conducted through the push-off screw 14, the connector 23, and the shaft 22.
As shown in FIG. 4B, other display units may include a load display unit that can confirm the presence or absence of a load, and a BC display unit that displays when a BC (Breaking Current) flows. it can.

The switch 26 is connected in such a manner as to turn on and off the above two systems of lamps in the internal circuit, and between the power supply side electric wire 101 and the load side electric wire 102 between 1S-1L and 2S-2L. If the switch 26 is turned on only when the connection is established, both the display lamps 25 are lit and blinked.
The operation panel 27 is provided with a display unit 25 and a switch 26.

  In such an uninterruptible tool 1, when the push-cut portion 10 is attached to the power-side electric wire 101 and the load-side electric wire 102 that are wired in the vertical direction, as shown in FIG. The central axis extends in a direction substantially perpendicular to the side electric wire 101 and the load side electric wire 102 and toward the front surface. And when the connector 23 of the connection confirmation part 20 is inserted in the internal thread part 111 of the push-off part 10, the operation panel 27 is located in the front. Due to such a configuration, the uninterruptible tool 1 can be attached even when there is no space in the vertical direction.

  Next, instrument replacement using the uninterruptible tool 1 will be described with reference to the drawings. FIG. 5 is an explanatory diagram for explaining how to use the uninterruptible tool, in which FIG. 5 (a) is a front view before connection of the connection confirmation unit, FIG. 5 (b) is a side view before connection of the connection confirmation unit, FIG. 5C is a side view after the connection confirmation unit is connected.

  First, the fixing base 12 and the main body 11 are sandwiched between the power supply side wire 101 and the load side wire 102 connected to the meter 200 to be replaced, and the bypass circuit is formed by pressing the cover with the push-off screw 14. . In this case, the state shown in FIG. In this case, as shown in FIGS. 1 (a) and 1 (b), in order to accommodate only the push-cut portion 10 whose length in the vertical direction is sufficiently shorter than that of the prior art in the instrument box 300. The connection can be made without being affected by the instrument box 300.

Subsequently, as shown in FIGS. 5B and 1B, the connection confirmation unit 20 is attached to the push-off unit 10. In this case, the worker inserts the connector of the connection confirmation unit 20 held in his / her hand into the female threaded portion 111 of the push-off unit 10 so as to be in a state as shown in FIG.
In this case, as shown in FIG. 2, the connector 23 of the connection confirmation unit 20 comes into electrical contact with the screw head 141 of the push-off screw 14 screwed into the female screw portion 111 of the push-off portion 10. The

  The position of the push-off screw 14 is slightly different depending on the state of the power supply side electric wire 101 and the load side electric wire 102, and the arrangement position of the connection confirmation unit 20 is different depending on the worker. Although the position is always different, in this embodiment, the connector 23 is always brought into close contact with the screw head 141 by the biasing force of the spring 24 to absorb the difference in position, so that the electrical connection is reliably performed.

  Subsequently, when the power switch 26 is turned on, the display unit 25 is lit or blinked when the power-side electric wire 101a and the load-side electric wire 101b are connected, so that the connection can be confirmed.

After the confirmation is completed, the connection confirmation unit 20 is removed and the state is returned to the state shown in FIGS. In this state, the expired replacement instrument 200 is removed, and the verified instrument 200 is installed. This makes it possible to replace the instrument 200 while the load side remains uninterrupted.
The usage method of the uninterruptible tool 1 is such.

The present embodiment has been described above. Of these meters, the watt hour meter (WHM) is often housed and installed in a cubicle or meter box that does not have much space, but with the uninterruptible tool 1 of this embodiment, the push-off portion 10 is a single unit. The push-down portion 10 can be attached without being affected by the instrument box 300. In addition, since the push-off part 10 is arranged on the back side and the connection confirmation part 20 is arranged on the front side, it is easy to secure a space in the front direction especially for convenience of measurement, that is, the front direction such as an opening is an open space. It is suitable for replacing a certain cubicle or instrument box instrument.
In this embodiment, the single-phase two-wire watt-hour meter (WHM) has been described. Needless to say, the present invention can be applied to a watt-hour meter (WHM) installed in a single-phase three-wire type or a three-phase three-wire low-voltage distribution system. No.

It is explanatory drawing of the uninterruptible tool of the best form for implementing this invention, Fig.1 (a) is a front view of a use condition, FIG.1 (b) is a side view of a use condition. It is a top view of the use condition of the uninterruptible tool of the best form for implementing this invention. FIG. 3 is an external view of a push-cut portion of the best mode for carrying out the present invention, FIG. 3 (a) is a front view, FIG. 3 (b) is a plan view, FIG. 3 (c) is a right side view, and FIG. d) is a bottom view. It is an external view of a connection confirmation part among the uninterruptible tools of the best form for implementing this invention, Fig.4 (a) is a top view, FIG.4 (b) is a front view. It is explanatory drawing explaining the usage method of an uninterruptible tool, FIG.5 (a) is a front view before the connection of a connection confirmation part, FIG.5 (b) is a side view before the connection of a connection confirmation part, FIG.5 (c) ) Is a side view of the connection confirmation unit after connection. FIG. 6A is an external view of a conventional uninterruptible tool, FIG. 6A is a front view, FIG. 6B is a plan view, FIG. 6C is a right side view, and FIG. 6D is a bottom view. . It is explanatory drawing explaining the connection state of the uninterruptible tool to a meter, Fig.7 (a) is a front view of a connection state, FIG.7 (b) is a right view of a connection state.

Explanation of symbols

1: Uninterruptible tool 10: Push-off part 11: Main body 111: Female thread part 112: Circular groove 12: Fixing base 121: V groove 13: Fastening screw 14: Push-off screw 141: Screw head 20: Connection confirmation part 21: Main body 22 : Shaft 23: Connector 24: Spring 25: Display unit 26: Power switch 27: Operation panel 100: Electric wire 101: Power source side electric wire 102: Load side electric wire 200: Instrument 300: Instrument box

Claims (3)

Since it is provided in the main body and is fixed to the power supply side wire and load side wire connected to the instrument, by screwing a push-off screw into the threaded portion, these power supply side wire and load-side wire are connected via the push-off screw. A push-off section that short-circuits each other to form a bypass circuit;
A female connector having a connector electrically connected to the bypass circuit and an operation panel including a display unit for indicating that the bypass circuit has been connected; By inserting this connector, the display part of the operation panel displays that the screw head of the push-off part and the connector of the connection confirmation part are electrically connected. A connection confirmation unit for informing whether or not connection with
With
This uninterruptible tool is characterized in that the connection confirmation unit is electrically connected to the head of the push-off screw of the push-off unit, and informs whether or not the connection between the power-side electric wire and the load-side electric wire is possible. In the uninterruptible tool according to claim 1,
The connector of the connection confirmation unit is applied biasing force by the elastic unit, uninterruptible tool, characterized in Rukoto are electrically connected in a state in which the connectors and the screw head of the press-cutting screws in close contact. In the uninterruptible tool according to claim 1 or 2,
When the cut-off part is attached to the power-side cable and load-side cable that are wired in the vertical direction, the female thread of the push-off part is approximately perpendicular to the power-side cable and load-side cable and is elongation central axis, also uninterruptible tool operation panel is characterized that you located on the front face when the connectors of the connect confirmation unit is inserted into the female screw portion of the press-cutting portion.

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