JPH0222922Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an electromagnetic switch which is a combination of an electromagnetic contactor and a thermal overcurrent relay, and particularly relates to a mounting device thereof.

Conventionally, there have been devices of this type as shown in FIGS. 1 and 2. In these figures, 1 is a magnetic contactor, 2 is a thermal overcurrent relay, 3 is a connecting conductor that electrically connects the magnetic contactor 1 and the thermal overcurrent relay 2, and 4 is a connecting conductor that electrically connects the magnetic contactor 1 and the thermal overcurrent relay. current relay 2
5 and 5' are mounting screws for mounting the electromagnetic contactor 1 and 6 for mounting the thermal overcurrent relay 2 on the mounting plate 4, respectively.

The electromagnetic contactor 1 and the thermal overcurrent relay 2 are connected by a connecting conductor 3, but since this alone is not strong enough, each is attached to the mounting plate 4 by mounting screws 5, 5' and 6 to increase mechanical strength and prevent the connecting conductor 3 from breaking or bending due to external forces, shocks, vibrations, etc. generated during wiring, transportation, or opening and closing of the electromagnetic contactor 1. ing. Note that the mounting plate 4 is usually formed of an iron plate.

Since the conventional mounting device is constructed as described above, a large mounting plate is required, and the electromagnetic contactor 1 and thermal overcurrent relay 2 must be fixed with screws 5, 5' and 6. First, a large amount of money is spent on parts and assembly costs, and when replacing the overcurrent relay 2, it takes time and effort to remove and install the screws 6, making it very uneconomical.

In order to eliminate the above-mentioned conventional drawbacks, this invention eliminates the need for screws for electromagnetic switches and thermal overcurrent relays, eliminates the need for mounting plates, reduces costs, and also makes it easier to attach and detach overcurrent relays. It is an object of the present invention to provide a mounting device for an electromagnetic switch that can be mounted with a single touch and has sufficient mechanical strength.

An embodiment of this invention will be described below with reference to the drawings. In FIG. 3, 7 is a mounting bracket, and 8 to 10 are parts formed on the mounting bracket 7 to fix the thermal overcurrent relay. a shaped bent portion, and a protrusion 8 formed on the first wall portion 9 side of this bent portion in a direction perpendicular to this wall portion 9 and protruding outward from this wall portion 9.
It is composed of. Reference numerals 11 and 11' denote U-shaped grooves (engaging portions) formed in the bent portion 7a on the second wall portion 10 side of the bent portion, which extend in the extending direction of the wall portion 10 and have openings. is formed so that it faces downward.

In FIGS. 4 and 5, 12 and 12' are projections (engaging portions) for fixing the mounting bracket to the electromagnetic contactor, and are tapered in the vertical direction. Moreover, FIG. 6 shows a cross section taken along the line -- in FIG. 4, and shows an enlarged view of the state in which the mounting bracket 7 is attached.

The device according to the embodiment of this invention is constructed as described above, and the mounting bracket 7 has a protrusion 8 inserted into the thermal overcurrent relay 2 side in the front-rear direction (the left-right direction in FIG. 5) and in the left-right direction (the left-right direction in FIG. 4). The thermal overcurrent relay 2 is fitted into the first wall portion 9 and the second wall portion 10 to prevent displacement in the vertical direction (vertical direction in FIG. 4). The U-shaped grooves 11 and 11' of the electromagnetic contactor 1 are inserted into the projections 12 and 12', respectively, and the electromagnetic contactor 1 and the overcurrent relay 2 are combined. Also, during assembly, after installing the mounting bracket 7 by inserting the U-shaped grooves 11, 11' into the protrusions 12, 12' of the electromagnetic contactor 1, insert the protrusions into the holes formed on the bottom of the thermal overcurrent relay 2. 8 and fit the bottom of the relay 2 between the first wall 9 and the second wall 10. The protrusions 12, 12' on the side of the electromagnetic contactor 1 are vertically reversely tapered, and the U-shaped groove 1 of the mounting bracket 7
1 and 11' are sized so that they can be inserted into the root of the taper, so that they cannot be removed in the vertical direction after the mounting bracket 7 is inserted. Also, the connection conductor 3 prevents it from coming off in the front and back direction.
This is done by

Note that the mounting fittings in the above embodiments do not need to be made of metal, and may be formed of a molded article using thermoplastic resin or the like as long as mechanical strength can be obtained.

As described above, according to this invention, it is possible to easily install the thermal overcurrent relay and connect the thermal overcurrent relay and the electromagnetic contactor with a single touch, and
Removal can be done with one touch by reversing the operation, and
No need for mounting screws.

Furthermore, since elastic force is not necessarily required to attach the relay to the fixture, there is no problem of unstable installation, and the relay can be reliably held for a long period of time even when used in a place where there is vibration etc. .

[Brief explanation of the drawing]

Fig. 1 is a front view showing a conventional device, Fig. 2 is a side view thereof, Fig. 3 is a perspective view of a mounting bracket showing an embodiment of this invention, and Fig. 4 is an electromagnetic switch using this invention. FIG. 5 is a front view thereof, FIG. 5 is a side view thereof, and FIG. 6 is an enlarged side sectional view showing a mounting state of the mounting bracket. In the figure, 1 is an electromagnetic contactor, 2 is a thermal overcurrent relay, and 7 is a mounting bracket. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] A U-shaped bent portion, a protrusion formed on one side wall of the bent portion in a direction perpendicular to the side wall and protruding outward from the side wall, and the other side of the bent portion. and an engaging part formed on the side wall side of the electromagnetic contactor, so that the overcurrent relay is prevented from being removed from the electromagnetic contactor in the vertical direction Inserting the protrusion of the fixture into the hole formed at the bottom of the overcurrent relay so as to engage the engaging portion of the fixture and prevent the overcurrent relay from coming off in the front-rear and left-right directions; . A mounting device for an electromagnetic switch, wherein the bottom of the overcurrent relay is fitted into a bent portion of the fixture so that the overcurrent relay is prevented from coming off in the vertical direction.