JP3139970B2 - Uninterruptible tool - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-interruptible power supply which is used for exchanging a meter by uninterruptedly connecting a power supply-side lead wire and a load-side lead wire connected to a meter such as a watt hour meter. Related to power failure tools.

[0002]

2. Description of the Related Art As a conventional uninterruptible tool, for example, FIG.
There are the following. That is, the conventional uninterruptible tool includes a main body 102 and a fixing base 103 for arranging and fixing the power supply side electric wire 101a and the load side electric wire 101b connected to the watt hour meter at predetermined positions, and the inside of the main body 102. And a push-off screw 104 serving to push off the insulation film of each of the electric wires and short-circuit the two electric wires.
And

[0003]

[0010] More specifically,
In the conventional uninterruptible power tool, the power supply-side electric wire 101a and the load-side electric wire 101b are arranged and fixed in grooves formed in parallel to the opposing surfaces of both the main body 102 and the fixing base 103. For this reason, the following inconvenience has occurred.

Depending on the manufacturer of the watt hour meter, each electric wire 10
Since the distances between the power meters are different, an uninterruptible tool having grooves at intervals corresponding to the installed watt-hour meter has to be prepared, and replacement work of the watt-hour meter has been troublesome. Furthermore, it is rare that the electric wire 101 is pulled out of the watt-hour meter in an orderly and parallel manner. Usually, the electric wire 101 is twisted or bent when the watt-hour meter is attached. Moreover, since the diameter of the wire 101 used in the factory is large and difficult to bend, the twist and the bend are corrected,
It took time to install the uninterruptible tool properly.
In addition, when the uninterruptible tool is forcibly attached, the electric wire is damaged, or the uninterruptible tool is damaged, which causes a reduction in the life of the uninterruptible tool.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an uninterruptible tool capable of coping with a watt-hour meter of each manufacturer with one uninterruptible tool and facilitating replacement work of the watt-hour meter. It is.

[0006]

In order to solve the above-mentioned problems, the present invention according to claim 1 includes a plurality of holding tables including a cut-off screw and made of an insulator; A fixing base for fixing the load-side electric wire together with the presser base; and a main body for holding the presser base in a groove portion and fixing the fixing base, wherein the push-off screw includes the power-supply-side electric wire and the load-side electric wire. In the uninterruptible power tool which can short-circuit each other, each of the holding tables can be independently moved along the longitudinal direction of the groove-shaped portion of the main body.

According to a second aspect of the present invention, in the uninterruptible tool according to the first aspect, a bypass conductor electrically connected to each of the push-off screws and driven by the push-off screw is connected to the bypass conductor. And fixing means.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is an external view of an embodiment of the present invention. FIG. 1 (a) is a plan view of the embodiment, FIG. 1 (b) is a front view of the embodiment, and FIG. 1 (c) is a side view of the embodiment. It is.
This embodiment is an uninterruptible tool 1 used for replacement work of a three-phase watt-hour meter. In the present embodiment, the push screw 7
(7a to 7f) are provided, six holding tables 2, a main body 3, a fixing table 4, and a bypass conductor 5 (5a to 5f).

The holding table 2 is housed in a groove of the main body 3 and is held by a rail 6 fixed to the main body 3.
Each holding table 2 has a structure that can slide and move the rail 6 along the longitudinal direction of the groove portion 3A. The function of the holding table 2 is to fix the power supply-side electric wire and the load-side electric wire drawn from the watt-hour meter together with the fixing stand 4. For this reason, the part to which the presser base 2 fixes the electric wire has a U-shape to facilitate fixing. In addition, it is desirable that the length of the portion in contact with the U-shaped electric wire is short. This is because even if the intervals between the electric wires are irregular, they can be easily and reliably fixed. The holding table 2 is made of an insulator. This is to prevent a short circuit accident.

As shown in FIG. 2A, which is a cross-sectional view taken along the line EF in FIG. 1, a push-off screw 7 is provided inside the holding table 2. The function of the push-off screw 7 is to push off the insulating covering of the fixed electric wire and to short-circuit the corresponding power-supply-side electric wire and load-side electric wire. For this reason, the push-off screw is made of a conductor.

The function of the main body 3 is to hold the holding table 2 so as to be movable, and to fix the fixing table 4 with a tightening screw 8.

The function of the fixing table 4 is to fix the electric wire together with the holding table 2. The conventional fixing table 103 shown in FIG. 4 has a U-shaped groove formed on a surface facing the main body 102. However, the fixed base 4 of the present embodiment may be simply a plate-shaped one.

The bypass conductor 5 is electrically connected to the push screw 7. The function of the bypass conductor 5 is to short-circuit the power supply side wire and the load side wire corresponding to each other.

In the present embodiment, the rigid bypass conductor 5 is shown in the figure assuming that a particularly large current flows, but it may be constituted by a flexible electric wire.

The bypass conductor 5 and the fixing means 9 are
(A) and FIG. 2 which is a cross-sectional view of ABCD of FIG.
(B). Bypass conductors 5a, 5f, 5b, 5e,
5c and 5d electrically connect the push-off screws 7a and 7f, 7b and 7e, and 7c and 7d, respectively (dotted line portions in FIG. 1A). Each of the bypass conductors 5 is electrically connected to each of the push-off screws 7 via a connection conductor 10 provided inside the holding table 2 (FIG. 2B). Each bypass conductor 5
Are constituted by curved plate-shaped conductors, which are mutually overlapped at their respective ends and fixed by the fixing means 6. When the two corresponding plate-shaped conductors 5 are separated, each of the bypass conductors 5 can also move with the movement of the holding table 2 described above. On the other hand, by fixing the two bypass conductors 5 by the fixing means 9,
A short circuit between the power supply side electric wire and the load side electric wire is ensured.

As shown in FIG. 2B, the fixing means 9 comprises:
It comprises a bypass conductor tightening screw 11, a nut 12, a spring washer 13, and a washer 14. The overlapping portion of the bypass conductor 5 has a slot 20
Is provided, and the bypass conductor fastening screw 11 passes through the elongated hole 20 (FIG. 1A). The two bypass conductors 5 are crimped and fixed by tightening the bypass conductor tightening screw 11 into the nut 12 fixed to the bypass conductor cover 15. The bypass conductor cover 15 is made of an insulator.

Next, a specific procedure for replacing the watt-hour meter using the present embodiment will be described. 1. The power-supply-side electric wire and the load-side electric wire drawn from the wattmeter are slid along the rails 6 of the holding tables 2 and sandwiched between the holding tables 2 and the fixing tables 4. 2. The tightening screw 8 is screwed into the fixing base 4 to fix the power-supply-side electric wire and the load-side electric wire. 3. The bypass conductor fastening screw 11 is screwed into the nut 12 to fix the two bypass conductors 5. 4. Tighten each push-off screw 7 provided on each holding table 2 to push off the insulation coating of the power-supply-side electric wire and the load-side electric wire to make it conductive. Short-circuit the side wire. 5. Replace watt-hour meter.

FIG. 3 shows an uninterruptible power tool 1 according to this embodiment.
FIG. 1 is an external view showing a state in which is attached to an electric wire 40 drawn out from a watt hour meter 30.

[0019]

As described above, according to the first or second aspect of the present invention, a single uninterruptible tool can be used for various watt hour meters having different distances between drawn wires. Even if the lead wire is bent or twisted, the work of replacing the watt hour meter can be easily performed. Further, the life of the uninterruptible tool can be extended.

According to the second aspect of the present invention, it is possible to easily replace the watt-hour meter even with a watt-hour meter used in a factory or the like where a large current flows.

[Brief description of the drawings]

FIG. 1 is a plan view, a front view, and a side view of an embodiment of the present invention.

FIG. 2 is a sectional view of the embodiment.

FIG. 3 is an external view illustrating a use state of the embodiment.

FIG. 4 is a plan view, a front view, and a side view of a conventional uninterruptible tool.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Uninterruptible tool 2 Holder 3 Main body 3A Groove 4 Fixing stand 5 (5a-5f) Bypass conductor 6 Rail 7 (7a-7f) Push-off screw 8 Tightening screw 9 Fixing means 10 Connection conductor 11 Bypass conductor tightening screw 12 Nut 13 spring washer 14 washer 15 bypass conductor cover 20 long hole 30 watt hour meter 40 electric wire

Claims (2)

(57) [Claims] 1. A plurality of holders each including a push-off screw and made of an insulator, a fixing stand for fixing a power supply side wire and a load side wire connected to an instrument together with the holders, and a groove formed in the holder. An uninterruptible tool, comprising: a main body that holds the fixed base and holds the fixed base, wherein the push-off screw enables the power-supply-side electric wire and the load-side electric wire to be short-circuited to each other. Is an uninterruptible tool, which can move independently along the longitudinal direction of the groove portion of the main body. 2. The uninterruptible tool according to claim 1, further comprising: a bypass conductor electrically connected to each of said push-off screws and driven by said push-off screws; and a fixing means for interconnecting said bypass conductors. An uninterruptible power tool characterized in that: