JPS6342451Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to circuits and disconnectors, and particularly relates to improving workability when installing a terminal block.

Figure 1 is a side view showing an example of a conventional circuit breaker. In the figure, 1 is a cover, 2 is a case with an opening on one side for attaching the cover, 3 is a handle, 4 is a terminal block, and 5 is a terminal. These are screws for attaching the stand 4 to the cover 1. Reference numeral 6 designates a lead wire led out from an internal accessory device of the circuit breaker or disconnector, and 12 designates a notch provided at the joining surface of the cover 1 to the case 2 to allow the lead wire 6 to pass through. Then, by operating the handle 3, the movable contact is brought into contact with and separated from the fixed contact via a link mechanism (not shown),
It opens and closes electrical circuits.

In such a conventional circuit disconnector, a lead wire 6 led out from an internal accessory device that detects the open/closed status of the electric circuit is connected to the terminal of the terminal block 4 for signal output.
The signal is brought out from the circuit and the disconnector. On the other hand, since the terminal block 4 is provided on the outside of the cover 1, a notch 12 is provided in the cover 1.
The lead wire 6 must be pulled out.
Further, since the terminal block 4 is attached to the cover 1 with the mounting screws 5, screw holes must be provided in the cover 1.

However, depending on the specification conditions for installing such circuit breakers and disconnectors, internal accessory devices may not be necessary, and in this case, there is no need to attach the terminal block 4 to the circuit breakers or disconnectors, and the above lead wire The cutout 12 of the drawer cover 1 or the screw hole in the cover 1 is unnecessary, and it is extremely inconvenient to provide such a screw hole or cutout 12 in the cover 1 in advance when no internal accessories are installed. . In addition, when attaching a terminal block to a circuit shield or disconnector that does not have a screw hole in the notch, provide a screw hole for attaching the terminal block 4 to the cover 1 of the circuit shield or disconnector, and insert the lead wire 6 of the internal accessory device. A notch 1 for passing the lead wire through the cover 1 in order to take it out from the circuit or disconnector.
Providing 2 has the problem that there are many work items, the work time becomes long, and the work efficiency decreases.

This idea was made in view of the above circumstances.
It is an object of the present invention to provide a circuit and a disconnector which allows a terminal block to be easily attached and which does not cause any inconvenience even when the terminal block is not installed.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings shown in FIGS. 2 to 9.

FIG. 2 is a side view, and FIG. 3 is a view taken along the lines shown in FIG. A thin wall portion 10 is formed in which the inner wall thickness is approximately 1/2 from the opening edge of the case 2 toward the rear side, and a cutout portion 7 is provided at the front end of the thin wall portion 10. A recessed portion 8 is formed approximately in the center. Also, recesses 9 are formed on both sides of the notch 7 in the side wall of the case, one end of which reaches the opening edge. Note that 3 is a handle for opening and closing the circuit and disconnector.

FIG. 4 is a perspective view showing a cover plate 11 for closing the notch 7 of the case 2, in which convex portions 11-1 are formed on both sides to fit into the recesses 8 provided in the notch 7 of the case 2. There is. As shown in the perspective view of FIG. 5, this cover plate 11 has a thin part 11 in the center so that the wall of the cover plate 11 can be easily broken when leading the lead wire of the internal accessory device to the outside. -2 may be formed.

FIGS. 6 to 8 are a front view, a side view, and a line arrow diagram of FIG.
-1 and a terminal plate 4-2 for fixedly connecting lead wires from an internal accessory device. An L-shaped locking pawl 4-5 is provided in a protruding manner so as to engage with a thin wall portion 10 following the notch 7 of the case 2 shown in FIG. 2 or 3. The proximal end of this locking pawl 4-5 has the same size as the notch 7 of the case 2, and is structured to fit into this notch, and a part of it is provided with a thin wall 4-3 that can be broken through with a screwdriver or the like. The lead wire from the internal accessory device can be drawn out by piercing through it. In addition, the protrusions 4-4 on both sides of the locking pawl 4-5 in FIG. 8 are formed to fit into recesses 9 provided in the case 2, as shown in FIGS. 2 and 3.

Terminal block 4 is connected to the circuit and disconnector configured in this way.
The side view of FIG. 9 shows the state in which the parts are fitted and installed. In this case, first, the cover 1 of the circuit breaker or disconnector is removed, and the locking claw 4 - 5 of the terminal block 4 is inserted through the notch 7 of the case 2 . Then, the terminal block 4 and its locking claws 4-5 hold the thin portion 10 of the case 2 following the notch 7 by sandwiching it from both side plate surfaces. At this time, the notch 7 of the case 2 is filled with the base plate of the locking pawl 4-5, and the dimensions of each part are set so as not to create any gaps. Further, the gap between the locking pawl 4-5 and the terminal block 4 is made slightly narrower than the thickness of the thin portion 10 of the cover 2. Further, the two protrusions 4 - 4 of the terminal block 4 fit into the recesses 9 provided in the case 2 . The lead wire 6 of the internal accessory device breaks through the thin wall 4-3 of the terminal block 4 and is drawn out from there. Then, by inserting and engaging the locking claw 4-5 of the terminal block 4 into the case 2 and fixing the cover 1 to the case 2 again, the base end of the locking claw 4-5 is connected to the case 2 of the cover 1. Press down with the mating surfaces to fix the terminal block 4 to the circuit or disconnector.

The present invention is not limited to the above embodiment. For example, as shown in FIG.
A recess 9 may be provided on the terminal block 4 side, and a protrusion 4-4 may be provided on the terminal block 4 side corresponding to this recess 9.

Therefore, according to the above embodiment, when the terminal block 4 is not attached to a circuit or disconnector, fitting the cover plate 11 into the case notch 7 causes no functional or aesthetic problems. . In addition, when installing the terminal block 4 on a circuit or disconnector, cover 1 of the circuit or disconnector.
Remove the terminal block 4 from the case 2 and break the thin wall 4-3 for drawing out the lead wires to form an opening.
By inserting the cover 1 into the notch 7 of the case 2 and fixing the cover 1 to the case 2 again, the terminal block 4 can be reliably connected to the circuit or disconnector, and the workability is also very good.

In addition, since recesses 9 are provided on both sides of the case notch 7 and the recesses 9 engage with the protrusions 4-4 on the terminal block 4 side, stress is applied when screwing the external lead wire to the terminal of the terminal block 4. Since the terminal block 4 can withstand a sufficient amount of water, there is no possibility that the terminal block 4 will come off from the circuit or disconnector at this time. In addition, the parts of the terminal block 4 that are inserted into the notch 7 of the case 2 and located here are only the thin wall 4-3 for the lead wire outlet and the reinforcing part around it. The area can be reduced. This means that the cover plate 11 used when the terminal block 4 is not attached to a circuit or disconnector can be small, and its strength can be easily improved and the short-circuit current of the circuit or disconnector can be easily prevented. It can also withstand internal pressure.

As described in detail above, the present invention is a device in which a contact is housed in a case and is driven toward and away by a lever protruding from a cover attached to the opening on the front of the case, and a notch is provided at a predetermined position on the edge of the opening of the case. A thin-walled part is formed following this notch, into which the locking claw of the cover plate or terminal block is selectively fitted, and a recess is formed on one side of the contact surface between the case or cover and the terminal block, and a recess is formed on the other side. A convex portion is formed on the surface. Therefore, it is possible to provide a circuit or disconnector to which a terminal block can be easily attached in place of the cover plate as required for internal accessory devices.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an example of a conventional circuit breaker, Figs. 2 to 9 are views showing an embodiment of the present invention, Fig. 2 is a side view, and Fig. 3 is a Fig. 4 and 5 are perspective views showing the cover plate, Fig. 6 is a front view of the terminal block, Fig. 7 is a side view of the terminal block, and Fig. 8 is Fig. 7. - Line arrow diagram, Figure 9 is a side view when the terminal block is installed, Figure 10 is a side view of another embodiment of the present invention, Figure 11 is a side view of the other embodiment mentioned above, Figure 11 is It is a side view which shows the cover of said other Example. 1...Cover, 2...Case, 3...Handle, 4...Terminal block, 4-1...Terminal section, 4-3...
...Thin wall, 4-4... Convex portion, 4-5... Locking claw, 7
... Notch, 9 ... Recess, 11 ... Lid plate.

Claims (1)

[Scope of utility model registration request] The contacts housed in the case are moved toward and away from each other by a lever protruding from a cover attached to the opening on the front of the case, and signals related to the operating status of the contacts detected by an internal accessory installed in the case are sent to the case. A circuit breaker led out to a terminal block arranged on the side has a notch formed at a predetermined position on the edge of the opening, a case with a thin section formed on the inside following this notch, and a case that is fitted into the above notch. A terminal block that is held on the side wall of the case by a cover plate or a locking claw that is inserted into the notch and engages with the thin part instead of the cover plate, and a locking claw formed at the base of the terminal block. a notch formed at a predetermined position on the edge of the opening when the lead wire of the internal accessory device inside the case is led out; a case in which a thin section is formed on the inside following this notch; a lid plate fitted into the notch; The terminal block is held on the side wall of the case by a locking claw that is inserted into the notch instead of the cover plate and engages with the thin wall part, and the thin wall formed at the base of the locking claw of this terminal block is pushed through. a lead wire that is broken and led out and connected to the terminal block to derive a detection signal of an internal accessory device;
A circuit breaker comprising a recess formed on one side of a contact surface between a case or a cover and a terminal block, and a protrusion formed on the other side and fitted into the recess.