JP2648906B2 - Uninterruptible replacement bypass 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 bypass tool for a watt-hour meter that can be operated.

[0002]

2. Description of the Related Art When a watt hour meter is replaced in a power outage state, a great deal of trouble is caused to a demand destination. Therefore, a bypass-type uninterruptible replacement method for replacing the watt hour meter without uninterruptible power supply has been conventionally considered. The uninterruptible replacement method provides two energizing blocks that can be separately attached to a plurality of electric wires on the power supply side and a plurality of electric wires on the load side that are electrically connected to the internal circuit of the watt hour meter. Connect both ends of a plurality of bypass lead wires to the connection terminals provided on each of the energizing blocks, and conduct a plurality of sets of corresponding wires on the power supply side and load side to each other via the lead wires. It is a way to make it.

[0003]

However, in the case of the bypass type uninterruptible replacement method as described above, not only the plurality of connection terminals are congested around the watt hour meter but also the space is limited. Because the connection work is forced in a very narrow space, the workability is not only very bad,
Short circuits are also likely to occur. In addition, an error is likely to occur in the connection between the bypass lead wire and each electric wire on the power supply side and the load side. In addition, when the tightening force of the connection terminal is unstable and vibration or impact is applied at the time of replacing the watt hour meter in the bypass connection state, troubles such as poor connection or disconnection may occur.

Further, as disclosed in Japanese Utility Model Application Laid-Open No. 63-1870065, it is possible to improve the workability of the above-mentioned bypass type uninterruptible replacement method,
There has been proposed an uninterruptible replacement tool for a power meter that is devised so as to eliminate the occurrence of troubles such as poor connection. The uninterruptible replacement tool shown in the publication has a holding table having a plurality of grooves capable of accommodating a plurality of covered electric wires on the power supply side and the load side, and a position corresponding to each groove of the holding table. By contacting the body with the screw hole on both sides of the insulated wire and tightening and fixing them with bolts, a plurality of insulated wires are sandwiched, and in this state, the screw inserted into the screw hole is tightened. By breaking the wire coating portion at the cutting edge at each tip, the conductor wire of each coated wire is electrically connected to the screw and the connection conductor between the screws.

However, in the uninterruptible replacement tool as described above, when the holding table is brought into contact with one side surface of the covered electric wire, the groove on the holding table side is positioned so as to correspond to each electric wire. Align and store each electric wire in each groove while aligning, and make the main body abut against the other side of the covered electric wire so that the stored electric wire does not fall out of the groove, and further tighten and fix the holding table and the main body with bolts In such a case, laborious and time-consuming work is forced. In particular, since the connection operation is performed in a very narrow space that is limited in space, the operation requires skill and the workability has not been sufficient.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and makes it possible to quickly and easily replace a watt-hour meter without an uninterruptible power supply, without causing erroneous connection or short circuit. It is an object of the present invention to provide an uninterruptible replacement bypass tool for a watt-hour meter that can be performed at a time.

[0007]

To achieve the above object, an uninterruptible replacement bypass tool for a watt hour meter according to the present invention is provided 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, the opening of each engaging portion is opened and closed by sliding along holes formed on both side walls of each engaging portion, and in the closed position, the engaging portions are inserted and engaged. An electric wire retaining member for retaining and holding the made electric wire is slidably opened and closed, and a female screw hole formed in a portion corresponding to each electric wire engaging portion of the tool body,
The tip with the screwing is conductive fastening screw member electrically connected to the wires held retained on SL retaining member is inserted engages <br/> to each engaging portion A plurality of conductors which are screwed together and which electrically connect a plurality of sets of screw members corresponding to each other on the power supply side and the load side among these tightening screw members are buried in the tool main body in a mutually electrically insulated state. And the wire retaining member is
It is divided into two in the sliding direction, and a pair of stoppers
Each slide openably structure pieces from both sides of the tool body
It has been done .

[0008]

According to the uninterruptible power tool replacement by-pass tool of the present invention having the above-described structure, when the watt-hour meter is replaced, first, the retaining member is slid to open each wire engaging portion. Then, holding the tool main body, the respective wire engaging portions are collectively inserted and engaged from the side with the electric wires on the power supply side and the load side of the watt hour meter. By closing the opening of the wire engaging portion, the entire bypass tool can be easily set for each wire. In such a set state, for example, by using an electric torque screwdriver or the like, by sequentially tightening the tightening screw members, the electric wires and the tightening screw members that are retained and retained from the respective engagement portions by the retaining members are electrically connected. Connected to. Thereby, 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 tightening screw member embedded in the tool body, and a bypass connection state without erroneous connection is obtained. The replacement work of the watt hour meter can be performed safely, reliably and efficiently without interruption.

In particular, the wire retaining member is comprised of those two-divided in its sliding direction, since their pair of retainer pieces from both sides of the tool body are respectively slid openably configuration, wire disconnect Since the space required for the opening and closing operation of the stopper member in the lateral direction is small, the operation can be easily performed in a place where the extra space on both sides of the power meter is narrow.

[0010]

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 by using the uninterruptible replacement bypass tool for a watt hour meter of the present invention, and FIG. 2 is a side view of FIG. 1 and 2
In the figure, reference numeral 1 denotes an AA-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 has three electric wires on a power supply side electrically connected to its internal circuit. 3
a, 3b, 3c and three electric wires 4a, 4b on the load side.
4c are exposed / arranged at adjacent intervals L1 and L2 different from each other on the power supply side and the load side. The three electric wires 3a, 3b, 3c on the power source side and the three electric wires 4a, 4b, 4c on the load side are respectively bundled into one thick conduit tube 3A, 4A and guided to the power source and the load. ing. In addition, each of the electric wires 3a to 3c, 4
As shown in FIG. 2, the vicinity of the connection portions of the power meters 1a to 4c with the watt hour meter 1 is bent in a substantially rectangular shape in a side view, as shown in FIG.

When the watt-hour meter 1 is replaced, such as when the watt-hour meter 1 is replaced, the three wires 3a, 3b, 3c on the power supply side and the three wires 4a, 4b, 4c on the load side are bypassed. This is an uninterruptible replacement bypass tool for connection, and the uninterruptible replacement bypass tool 5 is configured as follows.

FIGS. 3 to 6 show a bypass tool 5 for uninterruptible power supply replacement.
In the figure, reference numeral 6 denotes a tool body molded from an electrically insulating resin material such as hard vinyl chloride, for example. A total of six wire engaging portions 7a, 7b, 7c, 8a, which can be inserted and engaged collectively from the front side with respect to the wires 3a, 3b, 3c and the three wires 4a, 4b, 4c on the load side.
8b and 8c are formed. Of these, the adjacent distance between the three wire engaging portions 7a to 7c is equal to the adjacent distance L1 between the three electric wires 3a to 3c on the power supply side, and the remaining distance is 3
The adjacent distance between the wire engaging portions 8a to 8c is set equal to the adjacent distance L2 between the load-side electric wires 4a to 4c.

Reference numeral 9 denotes the six wire engaging portions 7a to 7c, 8
A wire retaining member provided on the opening side of each of a to 8c, comprising a pair of left and right retaining pieces 9A and 9B divided into two, and each of the wire engaging portions 7a to 7c and 8a in the tool body 6.
8c are slidably openable and closable in left and right lateral directions along holes 10 formed in both side walls of each of the wire engaging portions 7a to 7c and 8a to 8c in the closed posture.
The wires 3a to 3c, 4a to 4c, which are inserted and engaged with the cable, are retained and retained. 11a, 11b, 11c and 12a,
12b and 12c are the above-mentioned electric wire engaging portions 7a to 7c and 8a to
8c, the female screw holes 11a to 11c and 12a
12c have conductive tightening screw members 13 respectively.
a, 13b, 13c and 14a, 14b, 14c are threadably engaged with each other.

At the tip of each of the tightening screw members 13a to 13c and 14a to 14c, the electric wire engaging portions 7a to 7c and 8a are screwed with the tightening screw members 13a to 13c and 14a to 14c. 8c, and the wire 3 retained and retained by the retaining member 9
a to 3c, 4a to 4c, and
To 13c, 14a to 14c and electric wires 3a to 3c, 4a to
Substantially V-shaped blade portion 13a1 for electrically connecting the blade 4a to the blade 4a.
13c1 and 14a1 to 14c1 are formed. 1
Reference numerals 5A, 15B, and 15C denote copper conductors embedded in the tool body 6, and three sets of tightening screw members 13a and 14a, 13b, and 14b corresponding to the conductors 15A to 15C on the power supply side and the load side, respectively. , And two female screw holes 15a, 15 into which the 13c and 14c are screwed.
b, 15c, so that three sets of tightening screw members 13 corresponding to the power supply side and the load side, respectively.
a and 14a, 13b and 14b, and 13c and 14c
Comrades are electrically connected to each other.

16A, 16B and 16C are the conductors 15
A, 15B, and 15C are insulating members for electrically insulating each other, and also for electrically insulating the outside from each other. These insulating members 16A, 16B, 16
C are detachably attached to the tool body 6 in order from the outer one. The heads 13 of the tightening screw members 13a to 13c and 14a to 14c
+2 driver grooves are formed in a2 to 13c2 and 14a2 to 14c2, and the bits of the electric torque screwdriver can be engaged with these + driver grooves.

Next, a description will be given of a construction for replacing the watt-hour meter 1 without interruption using the uninterruptible replacement tool configured as described above. First, a pair of left and right retaining pieces 9A and 9B of the retaining member 9 in the tool body 6 are slid and retracted to the left and right sides, respectively, so that the wire engaging portions 7a to 7c and 8a to
8c is opened, and each of the tightening screw members 13a to 13c and 14a to 14c is
The wires 3a1 to 13c1 and 14a1 to 14c1 are moved so as to be retracted from the wire engaging portions 7a to 7c and 8a to 8c. In this state, by holding the tool body 6, the electric wire engaging portions 7a to 7c and 8a to 8c are collectively connected to the power supply side and the load side electric wires 3a to 3c and 4a to 4c of the watt hour meter 1 from the front side. To the retaining member 9
By sliding the pair of retaining pieces 9A, 9B to close the openings of the electric wire engaging portions 7a to 7c, 8a to 8c, the plugs are inserted into the electric wire engaging portions 7a to 7c, 8a to 8c. The combined electric wires 3a to 3c, 4a to 4c are retained and retained, and the entire bypass tool is connected to each of the electric wires 3a to 3c, 4a to 4c.
Set to 4c.

Next, for example, using an electric torque driver or the like, the tip bit is fastened to the tightening screw members 13a to 13a-1.
3c, heads 13a2 to 13c2, 14a to 14c, 14
a2 to 14c2, and after operating the torque screwdriver, tightening the tightening screw members 13a to 13c1.
Each of the tightening screw members 13a to 13c is tightened while sequentially controlling the torque of each of the tightening screw members 13a to 14c.
c, tip blades 13a1 to 13c1 of 14a to 14c, 1
At 4a1 to 14c1, the wires 3a to 3c and 4a to 4c, which are retained and retained by the retaining members 9 at their respective positions, are broken to cover the respective fastening screws 13a to 13c and 14a to 14c.
And the electric wires 3a to 3c and 4a to 4c are electrically connected reliably. Thus, the conductors 15A, 15B, 15C and the tightening screw members 13a to 13c, 14a to 14c, in which the electric wires 3a to 3c on the power supply side and the corresponding electric wires 4a to 4c on the load side are embedded in the tool body 6, are provided. Is electrically connected to the bypass.

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.

By the way, in the above-mentioned bypass-type uninterruptible replacement work, the electric wire engaging portions 7a to 7c and 8a to 8c are held by the tool body 6 and are connected to the power supply side and the load side of the watt hour meter 1. The wires 3a to 3c and 4a to 4c can be collectively inserted and engaged from the front side, and the retaining members 9 can also be simply slid from the lateral direction to each of the wire engaging portions 7a to 7c and 8a to 8c. Since the wires 3a to 3c and 4a to 4c inserted and engaged with the connector 8c can be retained and retained, not only the occurrence of erroneous connection can be avoided, but also the number of working steps can be reduced, and the space is restricted. Even under a narrow space, the predetermined connection operation can be performed very quickly and easily. In addition, the use of an electric torque screwdriver can reduce the amount of work, and each of the tightening screw members 13a to 13c, 14a to 14c.
The work quality can be improved while controlling the tightening torque to a suitable value.

[0020]

As described above, according to the present invention, the electric wire engaging portions of the tool main body are inserted and engaged collectively from the front side with the electric wires on the power supply side and the load side of the watt hour meter. In addition to the simple operation of sliding the retaining member from the lateral direction with respect to the tool body, the operation for preventing the electric wires inserted and engaged with the engaging portions may be performed. The number of working steps is very small, and the workability is not degraded due to the convergence of multiple connection terminals in a narrow space, making it very easy and efficient even in a narrow space. Can work. Moreover, since the electric wires on the power supply side and the electric wires on the load side of the watt hour meter can be securely connected by tightening the tightening screw members after all the wires are engaged together, incorrect connection or short circuit There is no need to worry about the occurrence of wobble, and it is possible to perform the work of replacing a predetermined watt hour meter safely and reliably without interruption.

[0021] In particular, the electric wire retainer members bisected by its sliding direction, since their pair of retainer pieces from both sides of the tool body are respectively slid openably configuration, sliding of the wire retaining member Since the required space in the horizontal direction for opening and closing work is small, it is easy to work in places where there is little extra space on both sides of the wattmeter, and the workability of replacing the watt hour meter without interruption Can be further improved.

[Brief description of the drawings]

FIG. 1 is a front view showing an outline of an uninterruptible replacement work performed by using an uninterruptible replacement bypass tool for 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 bypass tool for a watt hour meter.

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

FIG. 5 is a sectional view taken along the line VV of FIG. 3;

FIG. 6 is a sectional view taken along the line VI-VI in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Watt-hour meter 3a-3c Power supply side wire 4a-4c Load side wire 5 Uninterruptible replacement bypass tool 6 Tool body 7a-7c, 8a-8c Wire engagement part 9 Wire retaining member 9A, 9B Divided removal Stop piece 10 hole 11a-11c, 12a-12c Female screw hole 13a-13c, 14a-14c Tightening screw member 15A-15C Conductor 16A-16C Insulating member

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Toshiyuki Kiyo, Inventor 2-82 Watanabe-dori, Chuo-ku, Fukuoka City, Fukuoka Prefecture Inside Kyushu Electric Power Company (72) Harunobu Kodama, 2-Chome Watanabe, Chuo-ku, Fukuoka City, Fukuoka Prefecture 1-82 Kyushu Electric Power Co., Inc. (72) Fumio Ando 2-82 Watanabe-dori, Chuo-ku, Fukuoka City, Fukuoka Prefecture 2-82 Kyushu Electric Power Co., Ltd. (72) Inventor Koji Higashi, Watanabe-dori, Fukuoka City, Fukuoka Prefecture 2-82-82 Kyushu Electric Power Co., Inc. (72) Inventor Motohiro Okochi 2-182 Watanabe-dori, Chuo-ku, Fukuoka City, Fukuoka Prefecture Kyushu Electric Power Co., Inc. (72) Inventor Takeshi Hashimoto Fukuma-cho, Munakata-gun, Fukuoka Prefecture 4445-1 Tokyo Equipment Manufacturing Co., Ltd. Hei 6-141426 (JP, A)

Claims (1)

(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. To form a plurality of wire engagement parts that can be inserted and engaged,
On the opening side of these wire engaging portions, the opening of each engaging portion is opened and closed by sliding along holes formed on both side walls of each engaging portion, and each engaging portion is in the closed posture. An electric wire retaining member for retaining and retaining the electric wire inserted and engaged in the joint portion is slidably opened and closed, and a female screw hole formed in a portion corresponding to each electric wire engaging portion of the tool body, the tip with the screwing is conductive fastening screw member electrically connected to each <br/> wires held retained on SL retaining member is engaged bayonet engagement with the respective engaging portion A plurality of conductors which are screwed together and which electrically connect a plurality of sets of screw members corresponding to each other on the power supply side and the load side among these tightening screw members are buried in the tool main body in a mutually electrically insulated state. And the wire retaining member
Is divided into two in the sliding direction of
The pair of retaining pieces slide open from both sides of the tool body.
An uninterruptible replacement bypass tool for a watt hour meter, characterized in that it is configured to be able to close freely .