JPS59128453A - Electroscope - Google Patents

Abstract

PURPOSE:To make it possible to simply confirm the current of a coated electric cable without peeling off the coating layer thereof, by using an instrument having a blade with a predetermined configuration. CONSTITUTION:A pen shaped electroscope 5 is supported in relation for mutually isolating cutters 7, 8 each comprising a conductive material and the cutters 7, 8 are connected through a lamp 9. The blades 10, 11 of the cutters 7, 8 form such a configuration that the lower ends thereof are widened in the almost same plane and, when the blades 10, 11 are pushed to the external coating layer 17 of an electric cable, they are cut in the coating layer 17 without being shifted from the center line of the electric cable 12. In this state, the blade 10 is contacted with a core wire 13 while the blade 11 is contacted with a core wire 14. When a current is flowed through the electric cable 12 at this time, the lamp 9 is lighted.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to a voltage testing instrument for determining whether current is flowing through a coated electrical wire having at least '1fX1 and a second conductor therein.

Explanation of Prior Art When constructing, remodeling, or expanding a house or condominium, the main electrical wiring work must be done prior to or together with the interior work. Needless to say, electrical wiring must be done accurately. Even if it is discovered that there is a mistake in the electrical wiring after the interior work has been completed, it cannot be easily repaired. For this reason, it is necessary to check whether the electricity has been installed as planned during the electrical wiring work or when completing the indoor interior work.

For a more specific explanation, reference is now made to FIG. 1.

FIG. 1 is a diagram schematically showing a state in which indoor electrical wiring is installed in a house. The electric wire 1 is extended from the distribution board 2 through the ceiling to a predetermined location in the room. This electric ta1
is wired for, for example, an air conditioner. The electric wires 3 are similarly routed from the distribution board 2 through the ceiling to a predetermined location in the room. This electric wire 3 is for example for lighting equipment. The electricity 1114 is also wired from the distribution board 2 through the wall to a predetermined location in the room.

This electric wire 4 is used, for example, as an outlet for various electrical appliances.

Here, in order to check whether the electric wire 1 is wired as planned, a predetermined breaker within minute t[2 is turned on and it is checked whether current flows through the electric wire 1. The wiring conditions of the electric wires 3 and 4 are also inspected in the same manner. These wires are coated with an insulator. Therefore, conventionally, when checking whether electrical wiring is being performed as planned, the insulation coating layer of the wire is stripped to expose the core wire, which is the conductor, and the terminal of an ammeter or voltmeter is applied to this conductor. I was checking Retsu. As described above, conventionally, in order to check whether or not current is flowing through a coated electric wire, it is necessary to peel off the coating layer one by one, which is troublesome.

Purpose of the Invention This invention was made in view of the above situation, and its main purpose is to easily check whether current is flowing through a damaged electrical machine without removing the damaged layer. The aim is to provide a voltage testing device that can

The voltage detection instrument according to the present invention supports first and second cutters made of a conductive material in a spaced-apart relationship with each other by an insulator. The first cutter and the second cutter are electrically connected via a current detection means operated by a current flowing therethrough. Further, the first cutter blade and the second cutter blade are substantially in the same plane, and the shape of each blade is selected and positioned so that they form a substantially V-shape. Therefore, if the first cutter blade and the second cutter blade are pushed into the coated wire in a direction that intersects with the length direction of the wire, those blades will cut through the coating layer and the first cutter blade will cut into the coated wire. comes into contact with the first core wire of the electric wire, and the blade of the second cutter comes into contact with the second core wire of the electric machine. If current is flowing through the electric machine, the above-mentioned current detection means is activated. In this way, the above-mentioned objective is achieved.

The above objects and other objects and features of the present invention will become more apparent from the following detailed description with reference to the drawings.

DESCRIPTION OF THE EMBODIMENTS FIG. 2 is a front view showing an embodiment according to the present invention, with a portion thereof cut away. The illustrated pen-shaped voltage detection instrument 5 has an insulator 6 made of a plastic material, for example.
As shown in the figure, a first cutter 7 and a second cutter 8 made of a conductive material are supported at a distance of m from each other.

The first cutter 7 and the second J vine 8 are electrically connected via a lamp 9.

This lamp 9 lights up when current flows through the gates between the first cutter 7 and the second cutter 8.

Blade 10 of the first cutter 7 and blade 11 of the second cutter 8
As shown in the figures, the shapes are selected and positioned so that they are substantially in the same plane and form a substantially V-shape.

A description will be given of how the pen-shaped voltage detection instrument 5 having the above-mentioned 4n configuration works in order to confirm whether or not current is flowing through the covered electric wire.

FIG. 3 is a sectional view showing a coated electric wire.

The illustrated electric wire 12 has a first core wire 13 and a second core wire 14 inside. The first core wire 13 and the second core wire 14 each have a core wire coating layer 15 made of an insulating material.
and 16, and is further covered with an outer covering layer 17 also made of insulating forest material. It is assumed that such a mechanical electric machine 12 is extended, for example, from a distribution board through a ceiling rock to a predetermined location in a room.

Then, in order to confirm whether or not the electric wire 12 is wired as planned, a predetermined breaker in the distribution board is turned on. In this state, the ridge blades 10h and 11 of the first cutter 7 and second cutter 8 of the voltage detection instrument 5 shown in FIG. Press it on top. At this time, the electric wire 12
is supported on its back by a hard member, such as a wall. Blade 10 of first cutter 7 and second cutter 8
As mentioned above, the shape of the blades 11 is selected and positioned so as to form a U-shape, so that when these blades 10 and 11 are pressed against the external secondary target 17 of the electric wire 12, Naturally, the wire 1 is between the double-edged blades 10 and 11.
The voltage detecting instrument 5 is positioned so as to be located on the central axis of 2. In this state, when the voltage detecting instrument 5 is further pushed into the electric wire 12, the cutter blades 10 and 11 cut into the target mB without almost shifting on the central axis of the electric wire 12 due to their angular shape. And finally,
As shown in FIG. 4, the blade 10 of the cutter 7 in [. do. here,
If a current is flowing through the wire 12, a current will flow between the first cutter 7, the lamp 9 and the second cutter 8, thereby lighting the lamp 9. In this way, it is possible to easily check whether current is flowing through the wire without peeling off the coating layer, which is the object of the present invention.

The voltage detecting device according to the present invention cuts into the coating layer of an electric wire. Therefore, it is preferable to press the cutter blade of the voltage detection instrument onto the end of the extended electric wire as much as possible. This is because the coating layer of the end of the wire to be tested for voltage will be stripped off when it is connected to an electrical appliance in the future, and at the same time, the "a" layer where the cut is located will also be removed. However, even if it is unavoidable to test the voltage at the middle of the wire, the Nm
Just wrap the t'A TV tape around the notch.

Note that the pen-type voltage detection instrument 5 shown in FIG. 2 is intended for portable use. That is, a male thread 18 is formed on the outer peripheral surface of the insulator 6 of the pen-shaped voltage detection instrument 5, as shown in the figure. As shown in FIG. 5, a cap 2 has a female thread 19 that engages with this male thread 18.
0 is prepared. When the male thread 18 and the female thread 19 are engaged, the cap 20 completely shields the cutters 7 and 8 of the voltage detection instrument 5 from the outside. The cap 20 is preferably provided with a clip 21. In this way, the voltage detection device can be hung in the worker's pocket and carried around like a fountain pen or a ballpoint pen.

FIG. 6 is a front view showing another embodiment of the voltage detecting instrument according to the present invention, with a portion thereof being shown in broken view. The voltage detection instrument 22 shown is of the scissor type. That is, the first cutter 7 and the second cutter 8 are provided at the front portion of the first rotating member 24 that rotates around the rotating bin 23. Further, the front part of the second rotating member 25 that rotates around the rotating bin 23 has a function of supporting the electric wires to be cut by the cutters 7 and 8 so that they can be easily cut by the cutters 7 and 8. Support member 26
is provided. The support member 26 is formed with a recess 27 corresponding to the outer shape of the wire to be supported, thereby stably holding the wire in place and maintaining it in a predetermined position relative to the cutters 7 and 8. I will support it. The rear portions 28 and 29 of the first pivoting member 24 and the second pivoting member 25, respectively, form the handle 13 of the voltage sensing instrument shown. A spring 30 is disposed between the first rotating member 24 and the second rotating member 25, so that the first rotating member 24 always rotates in the direction not shown by arrow A. The second rotating member 25 is attached so that it always rotates in the direction shown by arrow B. - When checking whether current is flowing through the C1 gland, the operator should hold handle 2.
8 and 29 and rotate them in a direction so that they approach each other.

In this embodiment, the first cutter 7 and the second cutter 8
are both slidable in the vertical direction along the guide 31 with respect to the t8 edge rest 6. The sliding movement is fixed by tightening screws 32 installed on each cutter. In this way, the first cutter 7 and the second cutter 8 are set to 1! The reason for making this possible is as follows. That is, when the respective blades of the first cutter 7 and the second cutter 8 become worn or chipped due to long-term use, that portion may be removed or sharpened. If this is done, the lengths of the first cutter 7 and the second cutter 8 in the vertical direction will be shortened, and in this case, the cutters will be fixed by being moved downward once.

Further, as shown in FIG. 6, in the case of the voltage detection instrument shown, the portion of the f8 edge body 6 located on the jacket side of the first cutter 7 and the second cutter 8 is located on the paper spine side. Insulator 6
The screw 33 is attached to the part of J: and is made removable.

This provides convenience when replacing the first cutter 7 or the second cutter 8 with a new cutter.

FIG. 7 shows a state in which the voltage detecting instrument 22 having such a structure is checking whether or not current is flowing through the covered electric wire. In the figure, the first cutter 7 is in contact with the first core wire 13 of the electric wire 12, and the second cutter 8 is in contact with the second core wire 14 of the electric wire 12. The first cutter 7 and the second cutter 8 are electrically connected via the lamp 9, so if current is flowing through the wire 12, the lamp 9 will light up. become. In this way, a
You can easily check whether current is flowing through the overturned lightning n by peeling off the coating layer. When compared with the embodiment shown in FIG. 7, since the voltage detecting instrument shown in FIG. 7 has a support member 26 for supporting the electric wire, it becomes easier to collect electricity.

The support member 26 shown in FIG. 6 or 7 may be modified as follows. FIG. 8 is a front view showing a modified example of the support member 26, and FIG. 9 is a plan view thereof. If the support member 26a shown is attached to the voltage detection device 22 shown in FIG. 6 or FIG. It becomes a more versatile voltage detection instrument. Support member 2
6a is composed of two plaque fittings 34 and 35 made of a 33-electroconductive material and a main body part 36 made of an insulating material that holds them. As shown in the figure, a recess 37 corresponding to the outer shape of the electric wire to be supported is formed on the upper surface of the main body 36 . This recess 37I is the same as the recess 27 shown in FIG. 6 or 7. That is, the electric wire to be subjected to voltage detection is stably supported on this recess 37.

Plug fittings 34 and 35 are made and shaped so that they can be inserted into a regular electrical outlet. 1.Plug fittings 34 and 35 shown in FIG.
have protrusions 38 and 39 that protrude toward each other, respectively.

The protruding part 38 is located below the second cutter 8, and the protruding part 38 is located below the second cutter 8.
9 is located below the first cutter 7. Furthermore, the plug fittings 34J3 and 35 are insulated from each other. The main body portion 36 of the support member 26a has a groove extending from its upper surface to the protruding portions 38 and 39.
40 is formed.

In addition, as is clear from FIG. 10, which is a view taken along the line aX-X in FIG. 9, each protrusion 38
Grooves 41 and 42 are formed in the knife 39 to receive the second cutter 8 and the first cutter 7. These grooves 41 and 42 are arranged so that the second cutter 8 and the first cutter 7 move from the upper position shown by the solid line to the groove 40 of the main body 36 at 30 as shown by the dotted line. When moved to the lower position shown, the protrusion 38 and the second cutter 8 come into contact and the protrusion 39 and the first cutter 8 come into contact with each other.
This is to ensure reliable contact with the cutter 7, and also to prevent damage to the blades of the first and second cutters. In order to prevent the blades of the first and second cutters from being damaged, the first and second cutters are also attached to the support member 26 of the voltage detecting instrument shown in Fig. It is best to provide grooves at the four points where they touch.

As has been made clear from the above description, in the λ machine instrument 22 shown in FIG. 6 or 7, the supporting member 26 is
What is the voltage detection device that replaced 7? The IJ is installed so that it can detect not only the electric wires that have been overturned but also the electrical outlets. This may be a duplicate, but use a voltage detection device like A to check the electrical outlet 1.
There are x2 people who test ~. First, the plug fittings 34 and 35 are inserted into the electrical outlets 1 to 1 to be inspected. Then, when the handles 28 and 29 (FIG. 6) of the voltage detection instrument are rotated so as to approach each other, the first cutter 7 comes into contact with the protrusion 39, as shown in FIG. 2
The cutter 8 contacts the protrusion 38 . Therefore, if current flows to the outlet, the lamps 9 connected to the first cutter 7, second cutter 8, etc. will light up.

Note that the voltage detection instrument 5 shown in FIG. 2 was manufactured by SEIZO and did not have a support member. , [Nol: Therefore, as shown by the dotted line in FIG.
is formed on the outer β1 surface of the cap 20. In each of the above-described embodiments, a lamp is used as a current detection means that is activated by a flowing current, but other devices such as a buzzer that is activated by an electric current are also used. Other current sensing means may also be used.

Generally, 100 pol [- or 200 volts = a] is used for indoor wiring. In order to handle both voltages, 100 volts and 200 volts are used as current sensing means.
- You may also use one that can be switched between.

Effects of the Invention As described above, according to the present invention, the first cutter and the second cutter, which are made of electrocardiographic material and are electrically connected to each other via the current detection means, are subjected to voltage detection. Since the pad of the electric wire is cut in such a way that it can come into contact with the core wire inside, it is possible to easily check whether current is flowing through the electric wire without peeling off the coating layer.

In addition, since the shapes of the first cutter blade and the second cutter blade are selected and positioned so that they form a V-shape, it is possible to When pushing the cutter blade into the wire, the middle of the first cutter blade and the second cutter blade should be the center of the wire (J center @
Guide the voltage detector p as if reading the image. Therefore, the blade of the first cutter reliably contacts the first conductor of the electric wire, and the blade of the 20th cutter reliably contacts the second conductor of the electric wire.

[Brief explanation of the drawing]

FIG. 1 is a diagrammatic view of a state in which indoor electrospreading is applied to a house. FIG. 2 is a front view showing an embodiment of the pen-type voltage detector according to the present invention, with a portion thereof being shown broken away. , FIG. 33 is a sectional view showing a coated electric wire to be subjected to voltage detection. Figure 4 is a diagram showing whether or not current is flowing through the electric wire shown in Figure 3 using the voltage detection instrument shown in Figure 2. FIG. 2 is a front view showing a cap for the voltage detection instrument shown in the figure, with a portion thereof cut away. FIG. 6 is a front view of another practical example of the voltage detecting instrument according to the present invention, with a portion of the swallow being partially cut away. 7th
The figure shows a state in which whether or not a current is flowing through Nt'3, which is 1 m apart, is being checked using the voltage detection instrument shown in FIG. 6. FIG. 8 is a still view showing a modification of the supporting member for mounting the voltage detection instrument GJ in FIG. 6 or 7, and FIG. 9 is a plan view thereof. g;
Figure 1a is a view taken along the line X-X in Figure 9, and shows what kind of rA relationship the support member and cutter have.
It is a diagram. Figure (here, 5 is the voltage detection J tool, 6 +, !, insulator, 7
is the first cutter, 8 is the second cutter, 9 is the lamp, 10
and 11 is a blade, 12 is an electric wire, 13 is a first core wire, and 14
is the second core wire, 15.16 and 17 are the covered wire f;
)! , 22 indicates a voltage detection instrument. HolderT applicant Kiyoshi Hori

Claims (2)

[Claims] (1) A voltage detection instrument for checking whether current is flowing through a covered electric wire having at least first and second core wires therein, wherein the first and second core wires are made of a conductive material by an insulator. cutters are supported in a closely spaced relationship with each other, and the first cutter and the second cutter are electrically connected via a current detection means operated by a current flowing therethrough. The first cutter blade and the second cutter blade are approximately in the same plane, and the shapes of the respective blades are selected and positioned so that they approximately form a U-shape. Therefore, if the first cutter blade and the second cutter blade are pushed into the connected electric wire in a direction intersecting the length direction of the electric wire, the first cutter blade will cut into the electric wire. A voltage detecting instrument, wherein the second cutter blade contacts a second core of the electric wire. (2) The voltage detection instrument according to claim 1, wherein the current detection means is a lamp.