JPH0720608Y2 - Uninterruptible tools - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an uninterruptible tool, and more specifically, to a tool used for uninterruptible replacement work of electrical equipment such as transaction power meters of low-voltage customers, In particular, the present invention relates to an uninterruptible tool capable of replacing a watt-hour meter in use with a new watt-hour meter without interrupting the load when replacing the watt-hour meter for transactions.

[Prior Art] Conventionally, all the replacement work of a transaction power meter of a low-voltage customer has been performed after obtaining consent from the power outage work or waiting at home.

[Problems to be Solved by the Invention] In the present invention, when replacing a transaction electricity meter or the like, the electricity meter in use can be replaced with a new electricity meter without interrupting the load. We are going to provide a power outage tool, and by using this uninterruptible tool,
The electricity meter can be replaced without interrupting the power supply to the load.

By performing uninterruptible work in this way, the memory contents of the load connected to the load side of the watt-hour meter will not be destroyed by the work, and the unattended consumer will only obtain the watt-hour meter's approval in advance. , Uninterruptible work can be done while you are away.

Other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.

[Means for Solving Problems] To explain the outline of the typical inventions disclosed in the present application, the uninterruptible tool of the invention is temporarily placed near the terminal portion of a transaction electricity meter. It is a tool for temporarily connecting the power supply side conductor and the load side conductor of the watt-hour meter through an uninterruptible tool, and consists of the main body and the pressing board.

The holding table is a substantially rectangular plate made of synthetic resin, on the surface of which a large number of grooves having a substantially semicircular or triangular cross section are provided, and a strong reinforcing plate made of a steel plate is connected to the lower surface.

The groove is provided corresponding to each terminal position of the watt hour meter. Also, screw holes are provided at both ends in the length direction of the presser base.

The main body is a substantially T-shaped plate made of synthetic resin, and screw holes are provided corresponding to the positions of the grooves of the pressing base, and screws are inserted into the screw holes. Each screw corresponds to the terminal of the watt-hour meter, and the screw of the same phase corresponding to the phase of the watt-hour meter is electrically connected through the contact of the switch inside the synthetic resin of the main body. There is. The tip of the screw is a thin annular cutting blade.

Opening holes (through holes) are provided at both ends in the length direction, insert a bolt into this opening hole, insert this bolt into the screw hole of the presser base, and tighten it to integrally fix the main body and the presser base. can do.

The drive coil of the switch is connected between the screws of different phases via the contacts of the push button switch that connects and disconnects the coil to and from the pair of screws. Further, a resistor, a light emitting diode, and a circuit (display device) in which diodes are connected in series are connected between the respective screws of different phases. The light emitting diode can be replaced with a lamp.

[Operation] In such a configuration, when the work for replacing the watt-hour meter is performed, the pressing base is installed by applying it to the terminal portion from below the connection conductor (insulated conductor) of the watt-hour meter. At this time, the connection conductor is set in the groove of the presser base.

The main body and the pressing base are mechanically integrated by placing the main body on the pressing base from above the electricity meter connection conductor and tightening the pressing base with the bolts at both ends.

When the screw at the position corresponding to the groove of the presser base is tightened, the cutting blade portion at the tip of the screw cuts into the insulating portion of the electricity meter connection conductor and makes electrical contact with the conductor portion therein. When the screw comes into contact with the conductor portion, a voltage is applied to the screw, and when a voltage is applied to the screws of two different phases, the light emitting diodes of the display device connected between the screws of the two phases emit light.
When these light emitting diodes emit light, it indicates that all screws are electrically connected to the connection conductors of the electricity meter,
After confirming the lighting of these light emitting diodes, by pressing the push button switch, the coil of the switch is excited, the contact of the switch is closed, and the electric circuit between the screws of the same phase is completed.

The electrical circuit of the electricity meter is bypassed via the connecting conductors, screws and contacts of the switch inside the body. In this way, even when the watt-hour meter is removed while being bypassed through the internal connection conductor (switch) of the uninterruptible tool, the load of the watt-hour meter is connected to the power source through the uninterruptible tool, No interruption occurs.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

A case in which the embodiment is applied to an uninterruptible tool used for replacement work of a three-phase watt hour meter will be described. In FIG. 1, the uninterruptible tool 1 is a power supply side conductor of a transaction watt hour meter 2. 4, 5 and 6 and the load side conductors 7, 8 and 9 are temporarily connected through the uninterruptible tool 1, and are composed of a main body 10 and a pressing base 11.

As shown in FIG. 1, FIG. 3 and FIG.
Is a substantially rectangular plate made of synthetic resin, on the surface of which a number of semi-circular or triangular grooves 12, 13, 14, 15, 16, 17 are provided, and a strong reinforcing plate made of steel plate on the lower surface. The plate 18 is adhered. The grooves 12 to 17 having a triangular cross section are provided corresponding to the terminal positions of the watt hour meter 2. Further, screw holes 19 and 20 are provided at both ends of the pressing base 11 in the length direction.

As shown in FIG. 1, FIG. 2 and FIG. 3, the main body 10 is a substantially T-shaped plate made of synthetic resin and has screw holes 21 and 22 corresponding to the positions of the grooves 12 to 17 of the presser base 11. , 23,24,25,26 are provided,
Screws 28,29,30,31,32,33 are inserted in the screw holes 21 to 26. Each screw 28 to 33 is a terminal 1S; 1L; 2S; 2L; 3S; 3 of the watt hour meter 2.
Corresponding to L, the screws 28, 33, 29, 32, 30 and 31 of the same phase corresponding to the phase of the watt-hour meter 2 are the contacts 35, 36 of the switch 34 inside the synthetic resin of the main body 10. , 37 and electrically connected. The tips of the screws 28 to 33 are thin annular cutting blades 27. Opening holes at both ends of the body 10 in the length direction
38, 39 are provided, bolts 40, 41 are inserted into the opening holes 38, 39, and the bolts 40, 41 are inserted into the screw holes 19, 20 of the presser base 11 as shown in FIG. By the body
It is possible to integrally fix 10 and the pressing base 11.

The electric circuit connection of the uninterruptible tool 1 is as shown in FIG.
The screws 28, 33 corresponding to the 1S, 1L terminals of the watt-hour meter 2 are connected via the contacts 35 of the switch 34. Similarly, in-phase screw 2
9,32 and 30,31 are electrically connected via contacts 36,37, respectively. One end 43 of the drive coil 42 of the switch 34 connects the push button switch 44 to the screw 30, and the other end 45 thereof has a resistor 46.
To the screw 28 via. One end 43 of the drive coil 42 is connected to the screw 30 via the auxiliary contact 47 of the switch 34. Anti-parallel circuit of light emitting diode 48 and diode 49 and diode
Display devices 52, 53, 54, 55, 56, each having a configuration in which a resistor 51 is connected in series to one in which 50 is connected in series, are installed between screws 29 and 33, and between 29 and 31 respectively.
, Between 32 and 30, between 28 and 32, and between the terminals of resistor 46, respectively. The switch 34 is integrally molded with the main body 10 of the uninterruptible tool 1 by a synthetic resin, and the push button of the push button switch 44 and the light emitting diodes 48 of the display devices 52 to 56 are ...
It is exposed on the surface of the main body 10.

In such a configuration, when the work for replacing the watt-hour meter 2 is performed, the pressing base 11 is placed from one side of the connection conductors 4 to 9 of the watt-hour meter 2 and installed at the lower portion of the terminal portion 3. At this time, the connection conductors 4 to 9 are housed in the grooves 12 to 17 of the presser base 11.

The main body 10 is brought into contact with the other side surfaces of the watt-hour meter connecting conductors 4 to 9 and also brought into contact with the presser base 11. When the pressing base 11 is tightened by the bolts 40 and 41 inserted into the opening holes 38 and 39 at both ends of the main body 10, the main body 10 and the pressing base 11 are mechanically integrated.

When the screws 28 to 33 at the positions corresponding to the grooves 12 to 17 of the presser base 11 are tightened, the cutting blade portion 27 at the tip of the screws 28 to 33 is cut into the insulating portion of the electricity meter connecting conductors 4 to 9, and the conductor portions thereof are cut. Make electrical contact with. When the screws 28 to 33 come into contact with the conductor, a voltage is applied to the screws 28 to 33 from the connecting conductors 4 to 9, and when a voltage is applied to the screws of two different phases, the screws are connected between these two phases. The light emitting diodes 48 of the displayed display devices 52 to 55 emit light. When the light emitting diode 48 of the display device 52 to 55 emits light, all the screws 28 to 33 are connected to the connection conductors 4 to 9 of the watt hour meter.
After confirming that the light emitting diodes 48 ... Are turned on, the push button switch 44 is pressed to excite the coil 42 of the switch 34 and switch contacts 35 to 37 and The auxiliary contact 47 is closed to complete the electric circuit of the same phase among the screws 28 to 33, and the display device
56 lights up.

In the electric circuit to the watt-hour meter 2, the insulated conductors 4 to 9 on the power source side and the load side are bypassed via the screws 28 to 33, the internal conductor of the main body 10 and the switch contacts 35 to 37. in this way,
Even if the watt-hour meter 2 is removed in a state of being bypassed through the switch contacts 35 to 37 of the uninterruptible tool 1, the load of the watt-hour meter 2 is connected to the power source via the uninterruptible tool 1 and the power is momentarily supplied. There is no disconnection.

Although the invention made by the present inventor has been specifically described based on the embodiments, the invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the invention.

For example, in the above-described embodiment, an example in which the main body and the press base are pressed by bolts is shown, but the main body and the press base are not opened with through holes or screw holes, and the main body and the press base are pressed by a tightening jig, for example. You may make it fasten both ends of a stand.

Also, an example has been shown in which a screw having a blade at the tip is used to make a cut in the insulating portion of the insulated conductor, but another cut (cutting) member may be used as long as it has such a function.

Further, in the above embodiment, the switch (switching mechanism)
Although an example in which a coil is used to drive the motor has been shown, other drive mechanisms may be used.

Further, although an example in which the display device is composed of a light emitting diode, a diode and a resistor is shown, the display device may have another structure other than the lamp as long as the connection between different phases can be confirmed.

[Effect of the Invention] According to the present invention, the load of the watthour meter is connected to the power source (not shown) through the uninterruptible tool even if the watthour meter is removed while being bypassed via the inner conductor. Therefore, the power supply is not interrupted.

Further, according to the present invention, the main body of the uninterruptible tool and the pressing plate are made of synthetic resin insulation, and the screws and switches are embedded in the main body, so that the charging section exposed even when protruding outside There is no uninterruptible tool that is safe to use.

Furthermore, in the present invention, by reducing the number of light emitting diodes,
When using an uninterruptible tool, it is possible to check the presence or absence of electrical connection between different phases, so work using the uninterruptible tool can be made safe and reliable.

[Brief description of drawings]

FIG. 1 is an explanatory view of an embodiment of the present invention, FIG. 2 is a front view showing an embodiment of the present invention, and FIG. 3 is a sectional view taken along line XX of FIG.
FIG. 4 is a sectional view of the press base taken along line YY, FIG. 4 is a front view of the press base, and FIG. 5 is a circuit diagram showing an embodiment of the present invention. 1 …… Uninterruptible tool 2 …… Electricity meter 4 ～ 9 …… Insulated conductor 10 …… Main body 11 …… Holder base 12 ～ 17 …… Groove 21 ～ 26 …… Screw hole 27 …… Blade part 28 ～ 33… … Screw 34 …… Switch (switching mechanism) 35 to 37 …… Contact 42 …… Drive coil 44 …… Push button switch 47 …… Contact 48 …… Light emitting diode 52 to 56 …… Display device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tsukasa Endo 1-7-1 Yurakucho, Chiyoda-ku, Tokyo Toko Electric Co., Ltd. (56) References: 63-63774 (JP, U) 61-119274 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. In an uninterruptible tool for bypass-connecting a power supply side conductor and a load side conductor, which are pulled out to the outside of the watt hour meter, when replacing the power meter, the power supply side conductor and the load side conductor are housed. A plurality of grooves formed in parallel with each other, and an insulating main body that is fixed integrally with the pressing base by pressing each conductor with the pressing base. , A plurality of screws that are arranged at positions corresponding to the grooves of the holding table and that are connected to the conductive parts of each conductor by cutting the insulating part of each conductor with a blade, and a screw connected to the power supply side conductor And a screw connected to the load-side conductor, a switching mechanism, a drive mechanism that drives this switching mechanism, a connection state between the screw and each conductor, and a switching mechanism. Between the power supply side conductor and the load side conductor Uninterruptible tool characterized by comprising a display mechanism for displaying the connection status.