JPH0139612B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement in an earth leakage tripping device for electric leakage and disconnection in order to prevent harm caused by electric leakage.

[Technical background of the invention and its problems]

Conventionally, current leakage and disconnection devices include those that can protect against ground faults, disconnections, and overloads, and those that can further protect against short circuits. Did these automatically shut off due to a fault current when the current leaked or the circuit breaker automatically shut off, or a ground fault?
In the past, when a power failure occurred automatically due to a ground fault, it was displayed on the outside of the cover in conjunction with the display section of the display device so that it could be determined at a glance whether the power supply was automatically disconnected due to an overload or short circuit accident. That's what I do. This earth leakage tripping device for earth leakage and disconnection is (not shown)
It consists of components such as a solenoid, an armature rod, an earth leakage indicator button, and a return lever for automatic reset, but the assembly is extremely complicated, and the earth leakage tripping device must be secured to the earth leakage or disconnector by tightening screws, etc. It was held at However, there were drawbacks such as the need for time and effort to adjust the gap between the tripping lever of the earth leakage tripping device (not shown) and the tripping rod of the disconnector body.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and aims to improve the conventional drawbacks, simplify the assembly of the earth leakage trip device, and improve the reliability of repeated operations after the earth leakage trip device is assembled. Furthermore, it is an object of the present invention to provide an earth leakage tripping device for earth leakage and circuit breakers in which the gap between the tripping lever of the earth leakage tripping device and the tripping rod of the circuit breaker can be easily adjusted.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing the internal structure of the earth leakage/disconnector of the present invention, where 1 is a case and 2 is a cover, each of which is made of an insulating material. Reference numeral 3 denotes a power terminal, which is made of a conductive material such as brass or copper, has a contact point 3a at one end, and is fixed to the base. 4 is a movable conductor, and two or three pole movable conductors 4 are interlocked by a crossbar 8. A coil 5 is electrically connected to the movable conductor 4 and a load terminal (not shown). When the handle 10 is moved to the ON position, the movable conductor 4 rotates against the repulsive force of the torsion spring 11, and the contact 4b at the tip of the movable conductor 4 and the contact 3a of the power terminal 3 are connected.
contacts and connects power terminal 3 to load terminal (not shown)
It can be electrically connected and current can flow through it.
Further, when the handle 10 is moved to the OFF position (the state shown in FIG. 1), the contact 3a of the power terminal 3 and the contact 4b of the movable conductor 4 are separated, and no current flows.
Reference numeral 6 is an armature made of magnetic material, and in a magnetic circuit created by the magnetic flux generated by the current flowing through the coil 5, when a charged current exceeding the rated current flows in accordance with the movement of the iron core (not shown) in the oil dumpster pot 12. The structure is such that it operates at a predetermined time. At that time, the amateur 6 rotates clockwise around the pin 9, and the foot 6 of the amateur 6 at the terminal of the amateur 6 rotates clockwise around the pin 9.
Rod 7 for c to automatically disconnect the opening/closing mechanism
Rotate clockwise to turn on the current leakage or disconnection.
Turns OFF to automatically cut off overcurrent.

Next, regarding the configuration of the earth leakage tripping device, see the second section.
3, FIG. 4A, FIG. 4B, FIG. 4C, and FIG. 5. Figure 2 is an enlarged front view of main parts of the earth leakage tripping device, Figure 3 is a right side view of Figure 2, and Figures 4A, 4B, and 4C are assembled parts of the earth leakage tripping device. FIG. 5 is an enlarged perspective view of the main parts of the assembled parts. To assemble the earth leakage tripping device, as shown in FIGS. 4A and 4B, the solenoid 15 is mounted on a U-shaped pedestal 14.
d, and a U-shaped solenoid side protrusion 14e in which the tips of both legs face each other and are bent inward is attached to one end thereof, and a recessed hole 14f for a plunger is provided in the center thereof. A plate spring 14g is provided above the solenoid 15 with one end locked to a pedestal 14d, and a mounting pedestal 1 is provided below the U-shaped pedestal 14d.
6 is fixed with screws. Further, the plunger unit 20 shown in FIG. 4C is provided with a lever 20i formed of a thin metal plate on a mounting base 20h, and a plunger 20n fixed to the back side with a screw 20m via an insulating washer 20j and a washer 20k. . The plunger 20n is then inserted into the plunger recessed hole 14f of the solenoid 15 via the plunger return spring 21, and inserted into the projections 14e at both ends of the solenoid. Furthermore, the above-mentioned solenoid side protrusions 1 are inserted into the grooves provided in the leg-shaped protrusions 22P and 22q on both sides of the return lever 22 shown in FIG.
4e from below, a return lever 22 is slidably provided, and the tip protrusion 14 of the leaf spring 14g described above is inserted into the spring 4e from below.
f is provided to protrude into the recess 22s of the return lever, the earth leakage display button 13 is fixed to the button base 13f, and the return lever 22 is provided at both ends of the display button base groove 13u.
Attach by elastically narrowing both ends of the protrusion 22v,
The earth leakage tripping device is assembled as shown in FIGS. 2 and 3, and the legs 16w of the mounting base 16 are fitted and fixed into the grooves of the case 1 of the earth leakage cutter and disconnector shown in FIG. In order to satisfy the above-mentioned earth leakage tripping function, the gap between the lever 20i of the plunger unit 20 and the rod 7 is adjusted, and the plunger unit 20 is inserted into the case of the earth leakage cutter.

In the configuration of the above-mentioned earth leakage tripping device, when the above-mentioned earth leakage occurs or the disconnector operates from ON to OFF and the overcurrent is automatically cut off, the earth leakage display button 13
The engaged and integrated return lever 22 is pushed upward by the force of the leaf spring 14g, and the indicator bar 13x of the earth leakage indicator button 13 is connected to the indicator hole 1y of the earth leakage or disconnection case 1. mm Projects outside to notify the outside that there is a leakage or disconnection when the circuit detects a leakage current and automatically shuts off. At this time, handle 10
is in the OFF position (the state shown in Figure 1), and the rod 7 that automatically disconnected the opening/closing mechanism also needs to return to its original state, and the lever 20i end of the plunger unit 20 and the rod It contacts the 7th surface. On the other hand, when resetting the earth leakage indicator bar 13x, the earth leakage indicator bar 13x can be pushed from the outside, and when the handle 10 is moved to the ON position to close the movable conductor 4, the cross bar 8 moves counterclockwise. the hook-shaped foot 22 of the return lever.
It can be returned automatically by pressing z downward.

〔Effect of the invention〕

As described above, the present invention provides the plunger 20n of the plunger unit 20 in the plunger concave hole 14f of the solenoid 15 by inserting it into the solenoid side protrusions 14e via the return spring 21, and the protrusion of the return lever 22. 22b, and 2
The return lever 22 is slidably provided by fitting the protrusions 14e on both sides of the solenoid into the grooves provided in the respective grooves 2q, and the protrusion 14r at the tip of the leaf spring 14g is provided to protrude into the recess 22s of the return lever. Since the protrusions 22v on both sides of the display button 22 are sandwiched between the ends of the groove 13u of the display button and elastically attached, there is an effect of preventing the leakage display button 13 from coming off. Also, the mounting base 20 of the plunger unit 20
Since the lever 20i formed of a thin metal plate is firmly fixed to the lever 20i with a 20m screw, the gap between the leg of the lever 20i and the rod 7 can be easily adjusted. This has the effect that it can be reliably and easily assembled into a disconnector compared to the conventional method.

[Brief explanation of drawings]

Fig. 1 is a front view showing the internal structure of the earth leakage circuit breaker of the present invention, Fig. 2 is an enlarged front view of main parts of the earth leakage tripping device, Fig. 3 is a right side view of Fig. 2, and Fig. 4 A,
4B and 4C are enlarged perspective views of the main parts of the assembled parts of the earth leakage tripping device, and FIG. 5 is an enlarged perspective view of the main parts of the assembled parts. 10...Handle, 13...Earth leakage display button,
13t...Display button stand, 13u...Display button stand groove, 14d...U-shaped cradle for solenoid, 14
e... Solenoid both end protrusions, 14f... Recessed hole for plunger, 14g... Leaf spring, 14r... Tip protrusion of leaf spring, 20... Plunger unit, 20h... Mounting base, 20i... Lever, 20
m...screw, 20n...plunger, 21...
Plunger return spring, 22... Return lever, 2
2p, 22q...protrusion of return lever, 22s...
...Recessed part of the return lever, 22v...Protrusions on both sides of the return lever.

Claims (1)

[Claims] 1 A solenoid that rotates the rod that is activated by leakage current to automatically shut off the leakage or disconnection, and a leakage display that is linked to the operation of this solenoid, which is linked to the closing operation of the handle of the opening/closing mechanism. In the earth leakage tripping device, the solenoid is fitted with a frame that is fitted into a groove in the case of the disconnector, and the ends of both legs provided at one end are opposite to each other. U-shaped protrusions on both sides that are bent inward, a plunger inserted into the protrusions on one end that slides inside the solenoid, and a lever made of a thin metal plate that engages with the rod on the other end. a plunger unit having a plunger unit, legs having grooves that can slide on the bent portions of the protrusions on both sides, and after inserting into the grooves, the tip of a leaf spring fixed to the mounting frame is inserted between the legs. The ends of both legs are engaged with a base plate provided with an earth leakage display button, and the other ends of both legs are connected and have a hook-shaped foot at the end thereof, and are comprised of the protrusions on both sides and a slidable return lever. An earth leakage tripping device for earth leakage and disconnection, which is characterized by: