JP2645806B2 - 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, a bypass-type uninterruptible replacement method in which the watt hour meter is replaced during uninterruptible power supply is considered, and a bypass connection cable has been used as a tool for use in the uninterruptible replacement method. Was.

[0003] As shown in FIG. 17, a bypass connection cable 100 which has been used conventionally has a bypass electric wire 1.
At the both ends in the longitudinal direction of the electric wire 05, an engaging portion of a lead-in electric wire 102 for a watt hour meter inserted through the above-mentioned opening 103a inside an electric wire receiving portion 101a which is bent in a substantially L-shape and opened to one side. A vice-shaped connection terminal main body 101 having an electrode 103 and an electrode held by the main body 101 so as to be capable of screwing along a direction orthogonal to the axis Xo of the electric wire 102 inserted and engaged with the engagement portion 103. And a screw 104.

In the bypass connection cable 100 having the above-described structure, the electrode screw 104 is screwed, and the coating of the electric wire 102 inserted and engaged with the engagement portion 103 by the tip blade portion 104a is broken. The electric wire 102
When electrically connecting the electrode screw 104 to the wire 104, a large force acts on the wire receiving portion 101a of the vice-type connection terminal body 101 in a cantilever state, and the force does not deform the wire receiving portion 101a. As shown in FIG. 18, the electrode screw 104 extends along the axis Z at a position slightly eccentric with respect to the axis Xo of the electric wire 102 inserted and engaged with the engagement portion 103. It is configured to be screwed.

[0005]

In the bypass connection cable used for the uninterruptible power meter replacement method for the watt hour meter having the above-described structure, the connection with the axis Z of the electrode screw 104 due to the problem of the strength of the main body 101. When the electrode screw 104 is screwed forward because the axis Xo of the electric wire 102 inserted and engaged with the mating portion 103 is shifted by Δt, the tip blade portion 104 a
Are biased against the electric wire 102, and the electric wire 102 is in a laterally displaced state as shown by the imaginary line in FIG. 18, and as a result, the contact area between the electrode screw 104 and the wire of the electric wire 102 is reduced, There are problems such as connection failure and heat generation. In particular, the larger the diameter of the electric wire 102, the larger the above-mentioned lateral deviation amount Δt, and therefore, the connection reliability is further reduced, and therefore, the method is not applicable to electric wires having different diameters.

Further, the tip blade 10 of the electrode screw 104
In the case where the wire 4a is formed in a pointed shape as shown in FIG. 19, when an electric wire to be connected is formed by assembling a plurality of fine wire groups, the coating is broken by the pointed blade portion 104a. It is possible to penetrate the pointed blade portion 104a between the thin wires, which is more suitable for connection of electric wires. However, in the case of a single wire, the pointed blade portion 104a is formed along the outer periphery of the wire. The connection cannot be obtained with a certain slip. That is, in the case of the electrode screw 104 having the tip blade portion 104a as shown in FIG. 19, it cannot be used for connecting a single wire. On the contrary,
As shown in FIG. 18, in the case of forming a flat shape along a plane orthogonal to the axis Z, the present invention is not limited to a single wire and can be used to connect more wires. Even in the case of the target, due to the existence of the above-mentioned lateral deviation amount Δt, the tip blade portion 104a of the electrode screw 104 bites into the fine element wire in a deviated state.
The electrode screw 104 having the tip blade portion 104a as shown in FIG. 18 has not only an applicability to the diameter but also an applicability to the electric wire. It was missing.

The present invention has been made in view of the above-mentioned circumstances, and eliminates lateral displacement of an electric wire due to pressure welding of an electrode screw, thereby providing a reliable connection. It is an object of the present invention to provide a watt-hour uninterruptible replacement tool that can be applied to any of the electric wires.

[0008]

To achieve the above object, according to the Invention The uninterruptible replacement tool WHM according to the present invention, electrical
A recess is formed in one side of the tool body made of insulating material
An electric wire engaging part that can be inserted and engaged with the electric meter's electric wire from the side
And penetrating type on both side walls in the width direction on the opening side of this wire engaging part
Slide into the hole formed, close the opening and close
Receiving member for receiving an electric wire inserted and engaged with the engaging portion
And slightly smaller than the width dimension of the wire engaging portion.
It has an outer diameter and extends from the back side of the wire engaging portion to the opening side.
With the previous blade operation, the engaging portion is
Breaks the sheath of the wire that is plugged into and
And an electrode screw connected to the tool body.
A number of the wire engaging portions are juxtaposed, and these wire engaging portions are
Holes formed on both side walls in the width direction on each side of the opening.
Ride is inserted, each opening is closed, and inserted into each of the above engaging parts
The receiving member for receiving a plurality of wires
The number of the wire engaging portions is divided into two in the juxtaposed direction, and the opening edges of both ends in the width direction of the tool body in the holes into which the receiving members are slidably inserted are inclined with respect to the sliding direction of the receiving members. That is , it is formed on a tapered surface that can be inserted and guided in the hole.

Furthermore, in the uninterruptible replacement tool for the above energy meter, the surface of at least the wire receiving side of the receiving member, as claimed in claim 2, it is more preferable to form an arc shape.

[0010]

According to the present invention, when the watt hour meter is replaced,
First, in a state where the opening of the wire engaging portion is opened by sliding the receiving member of the wire, the wire on the power supply side and / or the load side of the wattmeter is inserted into the wire engaging portion from the side and engaged. At the same time, the receiving member is slid into the hole to close the opening of the wire engaging portion. Next, by using an electric screwdriver or the like to sequentially advance the electrode screw, the coating of the electric wire is broken by the tip blade portion, and the electrode screw and the electric wire are electrically connected. As a result, the electric wire on the power supply side of the watt-hour meter and the corresponding electric wire on the load side are electrically bypassed, and the replacement work of the watt-hour meter can be safely, reliably, and efficiently performed without interruption. I can do it.

By the way, the position of the electric wire inserted and engaged with the electric wire engaging portion is regulated by the both side walls in the width direction of the engaging portion, the receiving member, and the electrode screw so as to be surrounded from the entire periphery thereof. Since the outer diameter of the electrode screw is only slightly smaller than the width of the engaging portion in the width direction, even if the electric wire has a diameter that can be inserted and engaged in the engaging portion, the electric wire may be a single wire. , Irrespective of the wire diameter, even if it is a stranded wire or at any position in the width direction within the engaging portion, the tip blade of the above electrode screw is pressed against the wire to break the coating and secure electrical connection. The state is obtained. In other words, it is possible to apply a single uninterruptible replacement tool to bypass connection to various types of electric wires drawn into the watt hour meter.

[0012] In particular, electrostatic force may be carried out at once the bypass connections to multiple wires in a meter, together with attained the efficiency improvement of a predetermined uninterruptible replacement work requires the slide insertion of the electric wire receiving member during the work The work space is small, and the uninterruptible replacement work in a narrow space can be easily performed.

[0013] Also, a working space required for the sliding insertion of the upper Symbol wire receiving member can be further reduced.

Further, when at least the surface on the wire receiving side of the wire receiving member is formed in an arc shape as in claim 2 , the contact pressure when the wires are pressed against each other via the electrode screw is locally increased. Thus, the wire coating can be easily and reliably broken by the tip blade of the electrode screw under a small tightening torque, and the reliability of the electrical connection between the wire and the electrode screw can be improved.

[0015]

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

FIGS. 3 to 5 are views showing a 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 that can be inserted and engaged collectively from the side with respect to b are formed so as to be substantially U-shaped when viewed from the front. 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, and both side wall portions 70 in the width direction of the wire engaging portions 7a, 7b and 8a, 8b in the tool body 6.
a, 70b (FIG. 15) are slidably openable and closable in the left-right and lateral directions along the hole 10 formed respectively.
The electric wires 3a, 3b and 4a, 4b inserted and engaged with the electric wire engaging portions 7a, 7b and 8a, 8b are received and held. As the receiving member 9, its receiving surface 9a,
9b is an arc shape, and in this embodiment, a circular cross section is used.

Openings at both ends in the width direction of the tool main body 6 in the hole 10 are formed in a vertically long hole shape as shown in FIG. 6, and the edges of each opening are formed as shown in FIG. The receiving pieces 9A, 9B are formed so as to be inserted into the tapered surfaces 10A, 10B so as to be inserted obliquely with respect to the sliding direction.

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 above 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.

The above electrode screws 13a, 13b and 14
As shown in FIG. 15, the outer diameter d of each of the wire engaging portions 7a, 7b and 8a, 8b
The width L is set slightly smaller than the width L between A and 70B, so that the wires 3a, 3b and 4a, 4b are evenly pressed against the receiving member 9. The left and right side surfaces 70A, 70B of the parts 7a, 7b and 8a, 8b are the electric wires 3a, 3b and 4a,
4b is restricted.

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. Each output terminal of these current transformers 19A and 19B has an LED 20 for confirming connection between the power supply side and the load side.
A, 20B are connected, and these LEDs 20A, 20B are fitted into window holes 21A, 21B formed in the upper lid 6A. 22A and 22B are the receiving pieces 9A,
9B is a cord-like body for keeping the 9B connected to the tool body 6 side.

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 a pair of receiving pieces 9A and 9B in the longitudinal direction, a working space in the sliding direction for inserting and removing these receiving pieces 9A and 9B is small. Since the opening edge of the hole 10 is formed in 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 driver 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, the receiving pieces 9A, 9B are made circular in cross section, and their receiving surfaces 9a, 9B are formed.
b is an arc, the electrode screws 13a, 13
b and 14a, 14b are connected to the respective electric wires 3a, 3b, 4
It is possible to increase the contact pressure at the time of tightening to the a and 4b, and the breaking performance of the coating is further promoted and the contact property is enhanced.

The wire engaging portions 7a, 7b and 8a, 8b are connected to the electrode screws 13a, 13b, 14a,
An electrode screw 1 having opposite side surfaces 70A, 70B along the tightening direction of 14b and having an outer diameter d slightly smaller than a width dimension L between the opposite side surfaces 70A, 70B.
3a, 13b and 14a, 14b are connected to the wire engaging portions 7a,
7b and 8a, 8b are screwed to the opening side along the opposite side surfaces 70A, 70B from the back side.
As long as the diameters of the wires 3a, 3b and 4a, 4b can be inserted and engaged in the wire engaging portions 7a, 7b and 8a, 8b, the wires 3a, 3b and 4a, 4b are Regardless of the position within the width L between the side surfaces 70A and 70B, the electrode screws 13a, 13b and 14
The tightening force of the wires 14a and 14b acts equally on the wires 3a and 3b and the wires 4a and 4b, so that a reliable coating break and a reliable connection can be obtained. In addition, electric wires 3a, 3b and 4
Irrespective of the difference between the diameters of a and 4b and the difference between a single wire and a stranded wire, the positioning is controlled by the side surfaces 70A and 70B without causing an error due to a lateral displacement, and the coating can be reliably broken and a reliable connection is possible. is there.

As a result, the electric wires 3a and 3
b and the corresponding load-side electric wires 4a, 4b, regardless of the size or type of their diameter, conductors 15A to 15D, lead wires 16A, 16B, and electrode screws 13a, 13b, 14a, in the tool body 6. By-pass conduction is ensured electrically through 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 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 this case, as the resistive load, since it generates heat, a resistive load such as a compact dryer is preferable.

When the replacement work of the watt-hour meter 1 is completed, the respective 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, the tool corresponding to the replacement of the single-type watt-hour meter has been described. However, the replacement of the single-type watt-hour meter in which the electric wires on the power supply side and the load side are increased by one each. Even with a corresponding tool, the same effects as those of the above embodiment can be obtained.

In the above embodiment, a plurality of wire engaging portions 7a, 7b and 8a, 8b are arranged in parallel on the tool body 6, and a plurality of power source-side wires 3a, 3
b and 4a and 4b are described as being configured to be inserted and engaged collectively so that a predetermined bypass connection can be performed very efficiently. However, as shown in FIG. A connection terminal main body 41 having wire engaging portions 7 formed one by one in a substantially inverted U-shape when viewed from the front, and penetratingly formed in both side walls 70a, 70b in the width direction on the opening side of the wire engaging portion 7. The wire receiving member 9 is slidably inserted into the hole 10, and is held by the main body 41 so as to be freely screwed along a direction orthogonal to the axis of the wire 3 inserted and engaged with the engaging portion 7. The present invention may be applied to a bypass connection cable having the electrode screw 13. In this case, the outer diameter d of the electrode screw 13 is set to be slightly smaller than the width L of the wire engaging portion 7. Is similar to the above embodiment. .

[0042]

As described above, according to the present invention, the electric wire inserted into and engaged with the electric wire engaging portion is surrounded from the entire periphery by the widthwise side walls of the engaging portion, the receiving member, and the electrode screw. Since the outer diameter of the electrode screw is only slightly reduced with respect to the width dimension of the wire engaging portion, the wire has a diameter that can be inserted and engaged in the engaging portion. If the wire is a single wire, a stranded wire, or at any position in the width direction within the engagement portion, the tip blade of the electrode screw is attached to the wire regardless of the wire diameter. The coating is broken by pressing, and a reliable electric connection state can be obtained. In other words, it is possible to apply a single uninterruptible replacement tool to bypass connection to various types of electric wires drawn into the watt-hour meter. In addition to the above, it is possible to eliminate waste, and to eliminate the complexity of selecting a tool to be carried each time when going out for construction.

In particular, it is possible to make a bypass connection to a plurality of electric wires in the watt-hour meter at once, thereby improving the efficiency of a predetermined uninterruptible replacement work, and slidingly inserting and removing an electric wire receiving member during the work. The required work space is small, and the uninterruptible replacement work in a small space can be easily performed.

Further, the working space required for slidingly inserting and removing the electric wire receiving member can be further reduced.

Further, when at least the surface of the wire receiving member on the wire receiving side is formed in an arc shape as in claim 2, the contact pressure when the wires are pressed into contact via the electrode screws is locally increased. Thus, the wire coating can be easily and reliably broken by the tip blade of the electrode screw under a small tightening torque, and the reliability of the electrical connection between the wire and the electrode screw can be improved.

[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 configuration of a main part of an uninterruptible replacement tool of a watt hour meter according to another embodiment of the present invention.

FIG. 17 is a front view of a bypass connection cable, which is an example of a conventional uninterruptible replacement tool for a watt hour meter.

18 is an enlarged front view of a main part of FIG.

FIG. 19 is an enlarged front view of a main part showing another example of a conventional bypass connection cable.

[Explanation of symbols]

 3, 3a, 3b, 4a, 4b Electric wire 6 Tool body 7, 7a, 7b, 8a, 8b Electric wire engaging portion 9 Electric wire receiving member 9a Electric wire receiving surface 10 Hole 10A, 10B Tapered surface 13, 13a, 13b, 14a, 14b Electrode screw 31A Tip blade 70a, 70b Side wall L Width dimension of wire engaging part d Outside diameter of electrode 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. One side of a tool body made of an electrically insulating material
The power meter's electric wire is inserted from the side
Mateable wire engaging part and width of this wire engaging part on the opening side
Into the holes formed through the side walls
Close the opening and receive the wire
The width of the receiving member and the wire engaging portion
The outer diameter of the wire engaging portion is slightly smaller
From the tip of the screw with the screwing operation
Break the sheath of the wire inserted and engaged with the engaging portion with the blade portion.
And an electrode screw electrically connected to the electric wire, and a plurality of the electric wire engaging portions are juxtaposed on the tool main body.
On both sides in the width direction of each opening side of these wire engaging parts.
Sliding inserts into through-holes to close each opening
Receiving the plurality of electric wires inserted into and engaged with the respective engaging portions.
The receiving member in the direction in which the plurality of wire engaging portions are juxtaposed.
Divided into two parts, formed at the opening edge of both end portions in the width direction of the tool body in the bore which the receiving member is inserted slide, receiving insertion guide can be tapered surfaces on the hole and obliquely with respect to the sliding direction of the member An uninterruptible replacement tool for watt-hour meters , characterized in that 2. The uninterruptible power replacement tool for an electric energy meter according to claim 1 , wherein the receiving member has at least a surface on a wire receiving side formed in an arc shape.