JP2605223B2 - Uninterruptible replacement tool for watt hour meter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a watt-hour meter installed at each power demand destination, such as a house, for measuring power consumption. If the meter is repaired in response to a malfunction or is temporarily replaced for inspection, the specified work such as replacement of the wattmeter can be performed without interruption without stopping the power supply to the customer. The present invention relates to an uninterruptible replacement tool for a watt-hour meter that can be operated.

[0002]

2. Description of the Related Art If a watt hour meter is replaced in a power outage state, a great deal of trouble will be caused to a demand destination. Therefore, as a bypass type uninterruptible power meter replacement tool for a watt hour meter capable of performing a watt hour meter replacement operation without an uninterruptible power supply, the present applicant has a configuration as disclosed in JP-A-6-141426. Suggesting things.

As shown in FIGS. 16 and 17, the uninterruptible replacement tool for a watt-hour meter proposed by the present applicant has a power amount on one side of a tool body 101 made of an electrically insulating material. A plurality of electric wires 102a to 102c on a power supply side and a load side electrically connected to an internal circuit of a meter (not shown), respectively.
And a plurality of electric wire engaging portions 104a to 104c and 105a to 105c which can be collectively inserted and engaged from the side with respect to 103a to 103c.
04a to 104c and 105a to 105c, the engaging portions 104a to 104c and 105a to 1
The receiving members 106 of the electric wires 102a to 102c and 103a to 103c inserted into and engaged with 05c are slidably opened and closed, and the electric wire engaging portions 104a to 104c and 105a to 105c of the tool main body 101 are provided.
5c from the upper surface of the tool body 101 to the wire engaging portions 104a to 104c and 105a to 105c.
Screw insertion holes 111a to 111c and 1
12a to 112c are provided, and these screw insertion holes 111
a-111c and 112a-112c have the above-mentioned engaging portions 104a-104
c and electric wires 1 inserted into and engaged with 105a to 105c
Electrode screws 107a-1 that break the coating of 02a-102c and 103a-103c and are electrically connected to each electric wire
07c and 108a to 108c are inserted, and female screw holes 109a to 109c into which the electrode screws 107a to 107c and 108a to 108c are screwed are provided. A plurality of conductors 109A to 109C electrically connected to each other are embedded in the tool main body 101 coaxially with the screw insertion holes 111a to 111c and 112a to 112c.

[0004]

According to the uninterruptible power supply replacement tool for the watt hour meter having the above-mentioned configuration proposed by the present applicant, the bypass type uninterruptible power supply which has been implemented before that time is used. Replacement method, that is, a connection terminal provided on each of two power supply blocks which can be separately mounted on a plurality of electric wires on a power supply side and a load side respectively electrically connected to an internal circuit of a watt hour meter. The disadvantage of the method of connecting both ends of a plurality of bypass lead wires and conducting a plurality of sets of corresponding electric wires on the power supply side and the load side to each other via the lead wires is a drawback. Eliminates problems such as incorrect connection or short circuit with the electric wire, and poor connection or disconnection caused by unstable connection terminal tightening force. To be able to The it has.

[0005] However, in the conventional uninterruptible power tool replacement tool for an electric energy meter having the above configuration proposed by the applicant of the present invention, the electrode screws 107a to 107c and 108a to 10c are used.
8c are conductors 109A-10
Since it is formed as a male screw of the same diameter which is screwed into the female screw holes 109a to 109c of the 9C, the electrode screws 107a to 107c are formed using an electric screwdriver or the like after predetermined replacement work.
When unscrewing 107c and 108a-108c,
As shown by phantom lines in FIG.
07c and 108a to 108c may inadvertently and unnecessarily protrude from the upper surface 101a of the tool body 101. In this state, an electric conductor such as a screwdriver contacts between the protruding electrode screw heads. Then
There were points to be improved in performing the replacement work safely, such as causing a short circuit between the electrode screws and causing an unexpected trouble or accident.

The present invention has been made in view of the above circumstances, and restricts the head of the electrode screw from projecting from the upper surface of the tool body when the electrode screw is unscrewed, so that a trouble such as a short circuit or an accident can be prevented. It is an object of the present invention to provide an uninterruptible power tool replacement tool for a watt hour meter that can reliably prevent the occurrence of a power failure and perform a predetermined uninterruptible power replacement work.

[0007]

In order to achieve the above object, an uninterruptible power tool for a watt-hour meter according to the present invention is provided with a watt-hour meter on one side of a tool body made of an electrically insulating material. A plurality of wire engaging portions that can be inserted and engaged collectively from the side with respect to a plurality of wires on the power supply side and the load side electrically connected to the internal circuit of the On the opening side, receiving members for electric wires inserted and engaged with the respective engaging portions are slidably opened and closed, and a top surface of the tool main body is provided on a portion corresponding to each electric wire engaging portion of the tool main body. To each wire engaging portion is provided, and these screw through holes are screwed into the above-mentioned engaging portions at the tip blades with the screwing operation to break the coating of the wire engaged. Electrode screws electrically connected to each wire are inserted, and these electrode screws A plurality of conductors having a female screw hole to be screwed and corresponding to each other on the power supply side and the load side among these electrode screws are embedded in the tool main body coaxially with the screw insertion hole. An uninterruptible replacement tool for a watt-hour meter, wherein the electrode screw is rotated in the middle of the electrode screw with a constant screw unwinding amount with respect to the female screw hole during a screw unwinding operation from above. A small-diameter non-threaded portion for restricting projection from the upper surface of the main body is formed.

[0008] In the uninterruptible power tool replacement tool for a watt-hour meter having the above-described configuration, it is preferable that the distal end portion of the electrode screw is divided into four in the circumferential direction.

[0009]

According to the present invention, when the watt hour meter is replaced,
First, slide the wire receiving member to release each wire engaging part, and hold the tool body to collectively connect the above wire engaging parts to the power supply side and load side wires of the wattmeter from the side. The tool body is set with respect to each electric wire by making the insertion engagement and sliding the receiving member to close the opening of each electric wire engaging portion. Next, by sequentially tightening the electrode screws using an electric screwdriver or the like, the coating of each wire is broken by the tip blades of the electrode screws, and the electrode screws and the wires are electrically connected. As a result, the electric wire on the power supply side and the corresponding electric wire on the load side are electrically conducted through the conductor and the electrode screw buried in the tool body, and a connection state without erroneous connection is obtained. Replacement work of the meter safely without interruption,
It can be done efficiently.

When the electrode screw is unscrewed using an electric torque driver or the like after a predetermined replacement operation, when the unscrew amount becomes constant, the small-diameter non-threaded portion at the intermediate portion of the electrode screw is inserted into the female screw hole of the conductor. On the other hand, the electrode screw idles and the further screw return is restricted, so that the head of the electrode screw does not protrude from the upper surface of the tool body. Therefore, when the electrode screw is unscrewed, its head inadvertently protrudes from the upper surface of the tool body, and for example, a conductor such as a driver contacts the head of the protruding electrode screw, causing a trouble or accident such as a short circuit. There is no risk of occurrence.

[0011] If, for example, it is necessary to replace the electrode screw whose tip blade and the like are worn due to repeated use, the tool body is turned upside down and the electrode screw inserted into the screw insertion hole is replaced with the tool body. When slightly moving to the upper surface side of the lower part and engaging the lower male screw part following the small diameter non-thread part in the middle part with the end of the female screw hole of the conductor, and rotating the electrode screw via a driver in this state, The male screw portion is screwed into the female screw hole of the conductor and comes out to the upper surface side of the tool main body, whereby the electrode screw can be easily replaced.

If the tip of the electrode screw is divided into four parts in the circumferential direction, the biting performance of the electrode screw with respect to the covering of the electric wire by the tip of the electrode screw increases. In addition, the torque required when the electrode screw is broken and the electric wire is electrically connected to the electric wire by using an electric torque driver or the like can be reduced. This facilitates the connection operation, reduces the required strength of the electric wire receiving member, and facilitates downsizing of the entire tool.

[0013]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing an outline of an uninterruptible replacement work performed using the uninterruptible replacement tool for a watt hour meter of the present invention, and FIG. 2 is a side view thereof.

1 and 2, reference numeral 1 denotes a single-type watt-hour meter, which is mounted on the surface of an instrument mounting plate 2 fixed to a wall W or the like and electrically connected to an internal circuit thereof. The two electric wires 3a and 3b on the power supply side and the two electric wires 4a and 4b on the load side are exposed and arranged, respectively. The two electric wires 3a, 3b on the power supply side and the two electric wires 4a, 4b on the load side are respectively bundled into one thick conduit tube 3A, 4A and guided to the power supply and the load. As shown in FIG. 2, the vicinity of the connection between the electric wires 3a, 3b, 4a, and 4b and the watt hour meter 1 is bent in a substantially rectangular shape in a side view, as shown in FIG.

5 is for connecting the two electric wires 3a, 3b on the power supply side and the two electric wires 4a, 4b on the load side in a bypass shape when replacing the watt-hour meter 1, for example. An uninterruptible replacement tool, the uninterruptible replacement tool 5
Is configured as follows.

FIGS. 3 to 5 show the specific configuration of the uninterruptible replacement tool 5. In these figures, reference numeral 6 denotes a tool molded from an electrically insulating resin material such as hard vinyl chloride. In the main body, one side of the
Wires 3a, 3b and two wires 4a, 4 on the load side
A total of four wire engaging portions 7a, 7b and 8a, 8b which can be inserted and engaged collectively from the side with respect to b are formed in a substantially inverted U-shape in a front view. 6A is an upper lid of the tool body 6.

Reference numeral 9 denotes an electric wire receiving member provided on the opening side of the four electric wire engaging portions 7a, 7b and 8a, 8b, and a pair of right and left receiving pieces 9 divided in the longitudinal direction.
A, 9B, which are slidably openable and closable in left and right lateral directions along holes 10 formed in both side walls of the wire engaging portions 7a, 7b and 8a, 8b in the tool body 6. The electric wires 3a, 3b and 4 inserted and engaged with the respective electric wire engaging portions 7a, 7b and 8a, 8b
a and 4b are received and held. The receiving member 9 has an arc-shaped receiving surface, and has a circular cross section in this embodiment.

A hole 10 on one side of the tool body 6
As shown in FIG. 6, the left and right ends are formed in the shape of a vertically long hole, and the opening edges of the receiving pieces 9A and 9B are inclined with respect to the sliding direction as shown in FIG. It is edged so that it can be inserted from the direction, and is formed on the tapered surfaces 10A and 10B.

11a, 11b and 12a, 12b are respectively connected to the engaging portions 7a, 7b, 8 from the upper lid 6A of the tool body 6 corresponding to the wire engaging portions 7a, 7b, 8a, 8b.
a, 8b are screw insertion holes vertically provided, and these screw insertion holes 11a, 11b and 12a, 12b are
Electrode screws 13a, 13b and 14 to be screwed in
a and 14b are inserted.

The electrode screws 13a, 13b and 14
As shown in FIGS. 7 and 8, these electrode screws 13a, 13b and 14a, 14
b, the wires 3a, 3b and 4a, 4b engaged with the wire engaging portions 7a, 7b, 8a, 8b and received and held by the receiving member 9 break the coating of the electrode screws. 13a, 13b and 14a, 14
The blade part 31A divided into four in the circumferential direction for electrically connecting b to each of the electric wires 3a, 3b and 4a, 4b is formed.

Reference numerals 15A, 15B, 15C, and 15D denote copper connection conductors embedded in the tool body 6 coaxially with the screw insertion holes 11a, 11b and 12a, 12b, as shown in FIG. The conductor 15A on the power supply side and the conductor 15B on the load side are connected with the rivet 1 in the space 6B of the tool body 6.
6A (FIGS. 10 and 11), the conductor 15C on the power supply side and the conductor 15C on the load side.
D is electrically connected to each other via lead wires 16B stopped by rivets 16b.

As shown in FIGS. 10 and 11, the conductors 15A to 15D are formed with female screw holes 15a for screwing the upper screw portions 31B of the electrode screws 13a, 13b and 14a, 14b. Electrode screws 13a, 1
3b, 14a, and 14b are screwed into the respective blade portions 31A so that the wire engaging portions 7a, 7b, and 8
a, 8b. The conductors 15A to 15D are formed with rivet connection holes 15b on the lead wire side as shown in FIGS.

The above-mentioned electrode screws 13a, 13b and 14
As shown in FIG. 7, a small-diameter non-threaded portion 31D is formed between the upper and lower threaded portions 31B and 31C.
When the a, 13b and 14a, 14b are unscrewed, the small-diameter non-threaded portion 31D is disengaged from the female screw portions 15a on the conductors 15A to 15D side by a fixed unscrewing amount, and idles. The heads of the electrode screws 13a, 13b and 14a, 14b are restricted from projecting upward from the upper lid 6A.

Each of the above electrode screws 13a, 13b and 14
The outer diameters of the wires 3a, 3b are slightly smaller than the width L between the left and right side surfaces 70A, 70B (FIG. 15) of the wire engaging portions 7a, 7b and 8a, 8b.
b and 4a, 4b are evenly pressed against the receiving member 9;
Left and right side surfaces 70A, 70B of a, 7b and 8a, 8b
Are adapted to restrict lateral displacement of the electric wires 3a, 3b and 4a, 4b.

The electric wire 3a on the power supply side and the electric wire 4a on the load side
Lead 16A which is a part of a bypass circuit between
As shown in FIG. 14, current transformers 19A and 19B are respectively attached to the lead wires 16B which are part of a bypass circuit between the power supply side electric wire 3b and the load side electric wire 4b, as shown in FIG. The output terminals of these current transformers 19A and 19B are connected to LEDs 20A and 20B as light emitting elements for confirming the connection between the power supply side and the load side.
0A, 20B are window holes 21A, 21A,
21B. Reference numerals 22A and 22B denote cord-like bodies for retaining the receiving pieces 9A and 9B to the tool body 6 side, respectively.

Next, a description will be given of a construction for replacing the watt-hour meter 1 without interruption using the uninterruptible replacement tool 5 configured as described above. First, a pair of left and right receiving pieces 9A, 9B of the receiving member 9 in the tool body 6 are respectively slid to release the electric wire engaging portions 7a, 7b and 8a, 8b, and the respective electrode screws 13a, 13b, 1
4a and 14b are moved so that their tip blade portions 31A are retracted from the wire engaging portions 7a and 7b and 8a and 8b.

In this state, holding the tool body 6, the electric wire engaging portions 7a, 7b and 8a, 8b are connected to the electric wires 3a, 3b and 4a, 4b on the power supply side and the load side of the wattmeter 1 from the front side. The plug-in engagement is performed at once. Then, a pair of receiving pieces 9A and 9B of the receiving member 9 are inclined as shown in FIG.
By inserting and sliding in the holes 10 while guiding them along the lines 0B, the opening sides of the wire engaging portions 7a, 7b and 8a, 8b are closed,
The tool body 6 is set on each of the wires 3a, 3b and 4a, 4b.

Since the receiving member 9 is divided into two in the longitudinal direction into a pair of receiving pieces 9A and 9B, a working space in the sliding direction when inserting and removing the receiving pieces 9A and 9B is small. Since the opening edge of the hole 10 is formed on the tapered surfaces 10A and 10B, the receiving pieces 9A and 9B can be inserted obliquely as shown in FIG. Even in a narrow space, a predetermined set and reset operation can be easily performed. In addition, since the receiving pieces 9A and 9B have a circular cross section, there is no directionality of insertion / removal into / from the hole 10 as compared with a rectangular one, so that the setting operation is further facilitated.

Next, using an electric torque screwdriver or the like, the tip bit is connected to each of the electrode screws 13a, 13a.
Each of the electrode screws 13a, 13b and 14a, 14b is tightened while controlling the torque one by one by operating the torque driver after engaging with the driver grooves of the heads of the heads 3b, 14a, 14b. 13
The covering of the electric wires 3a, 3b and 4a, 4b is broken by the tip blade portions 31A of the a, 13b and 14a, 14b, and the electrode screws 13a, 13b, 14a, 14b and the electric wires 3a, 3b, 4a, 4b and Are electrically connected.

Here, since the tip blade portion 31A of each of the electrode screws 13a, 13b and 14a, 14b is divided into four in the circumferential direction, each of the electric wires 3a, 3b with a small torque.
And 4a, 4b can be broken, thereby reducing the required strength of the receiving pieces 9A, 9B, and making it easier to reduce the size of the entire tool. Further, by making the receiving pieces 9A and 9B circular in cross section, the electrode screws 13a and 13b and 14a and 14b
It is possible to increase the contact pressure when tightening to the a, 3b and 4a, 4b, further promoting the breaking performance of the coating.

Each of the wire engaging portions 7a, 7b and 8a, 8b is connected to each of the electrode screws 13a, 13b and 14a,
Since both side surfaces 70A, 70B along the tightening direction of 14b are opposed to each other, each of the electric wires 3a, 3b, 4
The electrode screws 13a, 13b and 14 may be located at any position within the width L between the side surfaces 70A and 70B.
a, 14b, the coating is reliably broken, and the wires 3a, 3b and 4a, 4
Regardless of the difference in the diameter of b, both side surfaces 70A, 70B
Thus, the coating can be reliably broken without causing an error due to the lateral displacement due to the position regulating action of the cover.

As a result of the above, electric wires 3a, 3
b and the corresponding electric wires 4a, 4b on the load side, regardless of their diameters, have conductors 15A in the tool body 6.
~ 15D, lead wires 16A, 16B and electrode screw 13
By-pass conduction is ensured electrically through a, 13b, 14a, 14b.

In such a bypass state, the watt-hour meter 1 is detached and a new watt-hour meter 1 is attached, so that power supply to the load side is not stopped, and the watt-hour meter 1 is uninterrupted. Can be replaced.

In the above replacement work, the electric wires 3a and 3b on the power supply side and the corresponding electric wires 4a and 4a on the load side are connected.
4b is definitely bypassed, the current transformer 19
A and 19B detect the current, and the LEDs 20A and 20B connected to these lights. Therefore, by visually recognizing whether or not the LEDs 20A and 20B are turned on during construction, it is possible to easily confirm whether or not there is a connection error or a connection failure, and to perform a proper connection reliably.

By the way, in the above-mentioned replacement work, a case where the load is very small or a case where there is no load are considered. In such a case, since the load current is equal to or less than the minimum lighting current value of the LEDs 20A and 20B, for example, about 1A, even if the LED 20A and 20B are properly connected, the LED 20
A and 20B may not light up. Therefore, in such a case, immediately after the completion of the bypass connection, a resistance load Ro such as a connection checker prepared separately from the tool is instantaneously connected in parallel to the load side as shown in FIG. LED20 by increasing the load resistance
It is possible to easily check whether the bypass conduction is good or not by turning on the lights A and 20B. In addition, since the resistance load such as the connection checker in this case involves heat generation,
For example, a dryer having heat radiation performance such as a compact dryer is preferable.

When the replacement work of the watt-hour meter 1 is completed, the electrode screws 13a, 13b and 14a, 14b are sequentially unscrewed using an electric torque screwdriver or the like. 13a, 13b
And a small-diameter non-threaded portion 3 at an intermediate portion between 14a and 14b.
1D is formed, the electrode screws 13a, 13
As shown in FIG. 11, when the unscrewing amount becomes constant, the upper threaded portion 31B of the b, 14a, and 14b is disengaged from the female threaded hole 15a of the load 15A to 15D, and the small threaded portion 31D is disengaged. As a result, the heads of the electrode screws 13a, 13b and 14a, 14b are restricted from projecting above the upper lid 6A of the tool body 6. Therefore, there is no occurrence of a situation in which the electrode screws are inadvertently short-circuited via a conductor such as a driver bit, and the tool can be reset safely and properly.

The electrode screw 1 can be repeatedly used.
In the case where the 3a, 13b and 14a, 14b are worn or the like, these are removed from the insertion holes 11a, 11b and 1 of the tool body 6.
It is necessary to take out from 2a, 12b and exchange it. In such a case, after turning the tool body 6 upside down,
When the electrode screws 13a, 13b and 14a, 14b are unscrewed with a screwdriver or the like, the lower screw portion 31C engages with the female screw holes 15a of the conductors 15A to 15D and is screwed. ,
The electrode screws 13a, 13b and 14a, 14b can be pulled out from the insertion holes 11a, 11b and 12a, 12b, taken out from the tool body 6, and easily replaced.

In the above embodiment, a tool corresponding to the replacement of a single-type watt-hour meter has been described. Even with a corresponding tool, the same effects as those of the above embodiment can be obtained.

[0039]

As described above, according to the present invention, when the electrode screw is unscrewed using an electric torque screwdriver or the like after the replacement work of the watt hour meter in the uninterrupted state, the unscrewed amount is fixed. Then, the small-diameter non-threaded portion at the intermediate portion of the electrode screw is caused to idle with respect to the female screw hole of the conductor, restricting further screw back and ensuring that the head of the electrode screw projects from the upper surface of the tool body. Can be prevented. Therefore, when the electrode screw is unscrewed, its head inadvertently protrudes from the upper surface of the tool body, and for example, a conductor such as a driver contacts the head of the protruding electrode screw, causing a trouble or accident such as a short circuit. There is no possibility of occurrence, and the predetermined uninterruptible replacement work can be safely performed.

In particular, when the tip of the electrode screw is divided into four parts in the circumferential direction as in claim 2, the biting performance of the electrode screw with respect to the covering of the electric wire by the tip of the electrode screw is increased, and the electric motor is driven. It is possible to reduce the required torque when the electrode screw is broken and the electric wire is electrically connected to the electric wire by using a torque driver or the like. As a result, the connecting operation can be performed easily, the required strength of the electric wire receiving member is reduced, and it is easy to reduce the size of the entire tool.

[Brief description of the drawings]

FIG. 1 is a front view showing an outline of an uninterruptible replacement work performed using an uninterruptible replacement tool of a watt hour meter of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a front view showing a specific configuration of an uninterruptible replacement tool of the watt hour meter.

FIG. 4 is a plan view of FIG. 3;

FIG. 5 is a right side view of FIG. 3;

FIG. 6 is a side view showing an insertion hole of a receiving member.

FIG. 7 is a front view showing an electrode screw.

FIG. 8 is a bottom view showing a tip blade portion of the electrode screw.

FIG. 9 is a plan view of the tool body with an upper lid removed.

FIG. 10 is a partially broken side view showing a screwed state of an electrode screw with a conductor.

FIG. 11 is a partially cutaway side view showing an idling state of an electrode screw with respect to a conductor.

FIG. 12 is a front view showing a conductor.

FIG. 13 is a side view of FIG.

FIG. 14 is an electric circuit diagram showing connection of LEDs.

FIG. 15 is a front view showing the insertion posture of the receiving piece.

FIG. 16 is a front view showing a conventional uninterruptible power replacement tool for a watt hour meter.

FIG. 17 is a vertical sectional side view of FIG. 16;

[Explanation of symbols]

 Reference Signs List 1 Electricity meter 3a, 3b Power supply side electric wire 4a, 4b Load side electric wire 5 Uninterruptible replacement tool 7a, 7b, 8a, 8b Electric wire engaging part 9 Electric wire receiving member 11a, 11b, 12a, 12b Screw insertion Holes 13a, 13b, 14a, 14b Electrode screw 15A to 15D Conductor 15a Female screw hole 31A Electrode screw tip blade 31D Small diameter screw

Continued on the front page (72) Inventor Kenji Morita 2-182 Watanabe-dori, Chuo-ku, Fukuoka City, Fukuoka Prefecture Inside Kyushu Electric Power Co., Inc. (72) Inventor Toshiyuki 2-1-2, Watanabe-dori, Chuo-ku, Fukuoka City, Fukuoka Prefecture No. Kyushu Electric Power Co., Inc. Inside Equipment Manufacturing Co., Ltd. (72) Inventor Toshiro Kono 4445-1, Fukuma-cho, Munakata-gun, Fukuoka Tokyo Inside Equipment Manufacturing Co., Ltd. (72) Inventor Takeo Miyaishi 2-3-21 Higashitenma, Kita-ku, Osaka-shi, Osaka Nichido Inside Electric Works Co., Ltd. (72) Inventor Tatsuo Nomura 2-3-21 Higashitenma, Kita-ku, Osaka-shi, Osaka Nichido Electric Works Co., Ltd. Examiner Nobuhiko Egashira (56) References JP-A-6-141426 (JP, A) Actual opening 1979-89487 (JP, U)

Claims (2)

(57) [Claims] 1. A plurality of electric wires on a power supply side and a load side electrically connected to an internal circuit of a watt hour meter are collectively arranged on one side of a tool body made of an electrically insulating material from a side. A plurality of wire engaging portions that can be plugged and engaged with each other are formed, and on the opening side of these wire engaging portions, receiving members for the wires that are plugged and engaged with the respective engaging portions are slidably opened and closed. In addition, screw insertion holes penetrating from the upper surface of the tool body to the respective wire engagement portions are provided at portions corresponding to the respective wire engagement portions of the tool main body, and these screw insertion holes are associated with the screwing operation. Electrode screws that are electrically connected to the respective wires by breaking the coating of the wires inserted and engaged with the respective engagement portions at the tip blades are inserted, and have female screw holes into which these electrode screws are screwed. Of these electrode screws, those that correspond on the power supply side and load side An uninterruptible replacement tool for a watt hour meter in which a plurality of electrically connected conductors are embedded in the tool body coaxially with the screw insertion hole, and from the top, in the middle of the electrode screw. A small-diameter non-threaded portion for rotating the electrode screw from the upper surface of the tool body by idling with respect to the female screw hole with a constant screw-back operation amount during the screw-back operation. Uninterruptible replacement tool. 2. The uninterruptible power tool replacement tool for an electric energy meter according to claim 1, wherein a tip blade portion of said electrode screw is divided into four in a circumferential direction.