JPS6330135Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a terminal device with a built-in arrester.

Various types of terminal devices are known for connecting and disconnecting between multiple terminal boards or between terminal boards and various electrical devices, but among these terminal devices especially require a safety device such as an arrester. For example, a U-ring plug is used to open and close terminal boards, and an arrester is connected to a part of this connection circuit, and each of these separately arranged parts is connected with a cable or other connection wire. I have to. Therefore, since this kind of conventional terminal device uses a combination of separate parts by wiring etc., the overall device becomes large and the price increases accordingly. Furthermore, the number of connection points due to wiring, etc. increases, and the overall conductive path becomes longer, which increases loss of contact resistance and conductor resistance, and as the number of wires increases, the number of man-hours increases and connection errors occur. . Furthermore, there were other drawbacks such as making it difficult to maintain and manage the entire device.

In view of these points, the present invention provides a terminal device with a built-in arrester that does not have the above-mentioned drawbacks.

According to this proposal, a pair of wiring terminals and a conduction plug with an arrester are installed in one split type insulating box, and the conduction plug is operated from the outside to open and close between the terminals and insert and remove the arrester. By configuring it to do so, it is possible to obtain a terminal device that does not have the above-mentioned drawbacks.

An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a front view of the split-type insulating box with one side removed to explain the outline of the device of the present invention. Figure 2 is a side view of the overall appearance of the one in Figure 1;
3 is a plan view of the entire structure shown in FIG. 1 seen from above, and FIG. 4 is a developed view of the arrester-equipped conduction plug shown in FIG. 1.

In FIG. 1, a pair of wiring terminals 2, 2' are slidably mounted in grooves 3, 3' in one of the split-type insulating boxes 1, 1'. the terminal 2,
Reference numerals 2' denote screws 3 and 3' loosely fitted into one of U-shaped lug fixing fittings 6 and 6', springs 7 and 7' engaged with the other of said fittings 6 and 6', and said screw. For example, when connecting an external terminal lug (not shown) to the terminal 2, 2', the external terminal lug is connected to the side. Place the screw 3 on the connecting plate 5 through the opening 9, insert a screwdriver through the opening 4, press the screw 3 against the spring pressure of the spring 7, and screw the screw 3 into the threaded portion of the connecting plate 5. As shown in the terminal 2 on the left side of FIG. 1, it is clamped and fixed between a connecting plate 5 and a metal fitting 6. Note that the first
The terminal 2' on the right side of the figure shows the state before connecting the external terminal lug. The connection plates 5, 5' are connected to the box 1,
It is inserted and fixed into the notch provided at 1'.
In addition, cutouts are provided on the sides of the metal fittings 6, 6'.
can slide in the direction in which the springs 7, 7' are pressed at the notches. Further, the dimensions of the openings 4, 4' are made smaller than the diameter of the heads of the screws 3, 3' to prevent the screws 3, 3' from coming out from the housings 1, 1'.

A conduction plug 12 with an arrester, which will be described later, is installed in grooves 10, 10' approximately in the center of the boxes 1, 1'. As shown in FIG. 4, the conductive plug 12 has a connecting piece 14 that is integrally fixed to a knob 13 made of an insulating material and arranged in a cylindrical shape, and slides into the connecting piece 14 while maintaining electrical contact by a spring 15. When the plug 12 is attached, one electrode 17 of the arrester 16 is brought into electrical contact with the spring 15 and the connecting piece 14, and the other electrode 18 is fixed to the case 1. ground terminal 19
is brought into contact with the spring 15 by the pressure of the spring 15. Further, the connecting piece 14 is provided with a pair of protrusions 14', and when the conductive plug 12 is installed into the case 1 from the outside, the protrusions 14' are connected to the recesses provided in the grooves 10, 10' of the case 1. 11 and 11', and while pressing against the spring pressure of spring 15, rotate plug 12 about 90 degrees to push protrusion 14' into connection plates 5 and 5' and spring 15, respectively. Pressure is brought into contact by action. In addition, 20 is the name strip, 2
Reference numeral 1 denotes an assembly rail for removably mounting a terminal device, and is electrically connected to a ground terminal 19.

Since the present invention is constructed as described above, when using it, each external terminal lug is inserted into the case 1 through the opening 9, and the connection plates 5, 5 of the pair of wiring terminals 2, 2' are connected as described above. ' with screws 3 and 3'. Next, the conductive plug 12 is mounted in the case 1 by pressing and rotating in the manner described above, and the protrusion 1
4' and the connecting plates 5, 5' are pressed together to establish electrical continuity between the wiring terminals 2, 2' and between the external terminal lugs.
On the other hand, the electrode 17 of the arrester 16 is electrically connected to a part of the conductive path between the lugs by the connecting piece 14 and the spring 15, and the other electrode 18 is connected to the ground terminal 19.
When the conductive path is in contact with the conductive path, it acts to protect the conductive path from overvoltage.

In order to open the conduction path, and thus to open the connection between the wiring terminals 2 and 2', the conduction plug 12 is pressed and rotated to release the contact between the protrusion 14' and the connection plates 5 and 5'. It will be done.

Further, when inspecting or replacing the arrester 16, the conduction plug 12 can be easily removed from the case 1 using the knob 13 after opening the conduction path using the method described above.

As described above, the terminal device of the present invention integrates the terminal mechanism, the arrester mounting mechanism, and the circuit opening/closing mechanism in one box, and allows the conduction plug to be detachably attached to the box by pressing and rotating. At the same time, since the circuit opening/closing operation and the arrester insertion/removal operation are performed, it is possible to obtain a terminal device with a simple structure and easy handling.

[Brief explanation of the drawing]

Figure 1 is a front view with one side of the split type insulating box removed to explain the outline of the proposed device;
The drawings are a side view of the overall appearance of the plug shown in FIG. 1, FIG. 3 is a plan view of the same, and FIG. 4 is a developed view of the arrester-equipped conduction plug shown in FIG. 1.

Claims (1)

[Scope of utility model registration request] A split type insulating box, a pair of wiring terminals and a ground terminal respectively mounted inside the box, and a pair of wiring terminals fixed to the insulating knobs and connected to the pair of wiring terminals at the tip thereof. a cylindrical connection piece having a protrusion; and an arrester that is slidably inserted into the cylindrical connection piece via a spring and has one electrode in electrical contact with the cylindrical connection piece; The pair of protrusions are attached to the recesses provided in the groove of the body, and are removably inserted into the case by pressing the knob, and the pair of protrusions are inserted into the case by rotating the knob after the press insertion. The protrusion and the pair of wiring terminals and the other electrode of the arrester and the ground terminal are removably connected by the pressing action of the spring, so that the arrester is connected to the pair of wiring terminals. A terminal device with a built-in arrester, comprising a conduction plug with an arrester that is detachably inserted between the terminals and the ground terminal.