KR100438985B1 - Interlock device for electromagnetic contactor - Google Patents

Abstract

The present invention relates to an interlock device of a magnetic contactor, and the present invention provides a plurality of magnetic contactor main body which is formed by engraving and interlocking the interlock receiving part on the surface in contact with each other, and inserted and installed so as to be concealed inside the interlock receiving part. When the power is applied to either of the magnetic contactor main body coupled together with the movable part of the main body, a blocking member which blocks power from being applied to the other magnetic contactor main body, and is fixed to the magnetic contactor main body by being coupled to the blocking member. By constructing the member, the mounting space for installing the interlock for operating only one of the two magnetic contactor main bodies can be reduced, so that the magnetic contactor can be miniaturized, and the production cost can be reduced by simplifying each component.

Description

Interlock device of magnetic contactor {INTERLOCK DEVICE FOR ELECTROMAGNETIC CONTACTOR}

The present invention mainly relates to an interlock device for a magnetic contactor for turning on / off a small motor, and more particularly, to an interlock device for a magnetic contactor capable of reducing a mounting space and reducing a production cost.

In general, a magnetic contactor is a power device used to turn a motor ON / OFF. This magnetic contactor turns on / off the motor by using the principle that a coil is wound around the inner core and a power is applied to generate a magnetic field around the core. That is, the magnetic contactor has a contact that is mechanically turned on and off inside, and when the core is attracted, the contactor pulls the contact to turn on the motor. On the other hand, when turning OFF, the contact is mechanically turned off when the suction force disappears by using the repulsive force of the spring inside the magnetic contactor.

Using these two magnetic contactors together, the motor can be rotated forward and backward. At this time, if two magnetic contactors are operated at the same time, a short circuit may occur. Therefore, an interlock device, which is a kind of locking device, is provided between two magnetic contactors so that one magnetic contactor is operated one by one.

FIG. 1 is a perspective view of an interlock device mounted between two magnetic contactors separated from an electromagnetic contactor, and FIG. 2 is a plan view of the interior of the conventional interlock device divided into an open state and a maintained state.

As shown in the drawing, the conventional interlock device 10 of the magnetic contactor includes a case having a plurality of fixing protrusions 11a and 11a respectively provided on both side surfaces so as to be fixed to the corresponding surfaces of the main magnetic contactor bodies 1 and 2 on both sides. (11) and a plurality of interlock levers (12) (13) which are installed on both sides of the case (11) so as to be rotatable, and interlock levers (12) (13) so as to be located at the center of the case (11). A lever pin 14 formed on the magnetic contactor main body 1 and the movable part of the magnetic contactor body 1, 2, and each of the interlock levers 12, 13, and the interlock levers 12, 13, respectively, in the OFF state. Is composed of a plurality of return springs (15, 16) provided to return while rotating in the opposite direction.

In the drawings, reference numeral 1a denotes a groove of the movable portion, 1b a guide hole, 3 a holder supporting the interlock device, 3a a guide rail, and 17 and 18 are lever rotation shafts.

In the conventional interlock device of the magnetic contactor as described above, the interlock levers 12 and 13 are separated by respective return springs 15 and 16 when both the magnetic contactor bodies 1 and 2 are in the OFF state. Open as shown in (a).

Next, when either magnetic contactor main body 1 (2) is excited (inserted), the lever pin 14 is lowered by a crossbar (not shown), and one interlock lever 12 moves the rotary shaft 17. As the center is rotated so as to be adjacent to the other interleaver 13, the front ends of the two interlock levers 12 and 13 cross each other, as shown in FIG. At this time, even if the other magnetic contactor main body 1 (2) causes the excitation operation, the two interlock levers 12 and 13 cross each other, and the other magnetic contactor main body 1 (2) does not excite.

Next, when the magnetic contactor body (1) (2) is released, the interlock lever (12) rotates in the opposite direction by the return springs (15) and (16), and returns to its original state, and opens as shown in FIG. It was to achieve a state.

However, the interlock device of the conventional magnetic contactor as described above is not only complicated in structure but also bulky, and thus has a large mounting space as it is fixed through a custom fit between two magnetic contactor bodies 1 and 2. There was a problem that the production cost is increased due to this.

The present invention has been made in view of the above problems of the conventional interlock device of the magnetic contactor, and it is an object of the present invention to provide an interlock device for a magnetic contactor that can reduce the mounting space and reduce the production cost.

1 is a perspective view showing an interlock device of a conventional magnetic contactor.

Figure 2 is an internal plan view showing the operation of the interlock device in the conventional magnetic contactor.

Figure 3 is an exploded perspective view of the magnetic contactor of the present invention.

Figure 4 is a perspective view of the assembled magnetic contactor of the present invention.

Figure 5 is a perspective view showing the disassembled interlock device in the magnetic contactor of the present invention.

Figure 6 is an operation diagram for the interlock device of the magnetic contactor of the present invention.

** Description of symbols for the main parts of the drawing **

21,22: Magnetic contactor main body 21A, 22A: Moving part

21a, 22a: Interlock receiving part 21b, 22b: Block insert groove

30: blocking member 31: fixing part

31a: fixing hole 32, 33: blocking part

40: fixing member 41a, 42a: fixing protrusion fixing groove

43: support protrusion

In order to achieve the object of the present invention, a plurality of magnetic contactor main body to form an intaglio interlock receiving portion in close contact with each other and the interlock receiving portion is inserted and installed to be concealed inside the interlock receiving portion coupled to the movable parts of both magnetic contactor main body When the power is applied to either of the magnetic contactor main body, the other magnetic contactor main body is characterized in that it consists of a blocking member for blocking the power is not applied, and a fixing member coupled to the blocking member fixed to the magnetic contactor body. An interlock device for a magnetic contactor is provided.

Hereinafter, an interlock device for a magnetic contactor according to the present invention will be described based on an embodiment shown in the accompanying drawings.

3 is an exploded perspective view of the electromagnetic contactor of the present invention, FIG. 4 is a perspective view of the electromagnetic contactor of the present invention assembled, and FIG. 5 is a perspective view of the electronic contactor of the present invention.

As shown in the drawing, the interlock device of the electromagnetic contactor according to the present invention includes a plurality of magnetic contactor bodies 21 and 22 which form an intaglio interlock accommodating portion 21a, 22a on a surface in contact with each other. And a blocking member 30 inserted and installed to conceal the inside of the interlock receiving portions 21a and 22a, and fixed to be coupled to the blocking member 30 so as to be fixed to both electromagnetic contactor bodies 21 and 22. It consists of the member 40.

The interlock receiving portions 21a and 22a may be formed in half on the corresponding surfaces of both magnetic contactor bodies 21 and 22, or may be formed on the side surface of either magnetic contactor body 21 as shown in the drawing.

In addition, the interlock receiving portions 21a and 22a are provided with blocking portion inserting grooves 21b and 22b for inserting the blocking portions 32 and 33 of the blocking member 30 to be described later, respectively. It connects with the movable parts 21A and 22A of 22, and is formed.

The blocking member 30 is composed of a fixing portion 31 and blocking portions 32 and 33 spreading from both ends at one end of the fixing portion 31. The other end of the fixing portion 31 is formed with a fixing hole (31a) for inserting and fixing the fixing member 40, the blocking portion 32, 33 is formed to be inclined so as to narrow the width toward the end.

The fixing member 40 is formed at both ends of the fixing projection fixing grooves 41a and 42a inserted into the fixing protrusions 21c and 22c respectively provided on the front surfaces of the electromagnetic contactor bodies 21 and 22, respectively. A support protrusion 43 is formed in the middle of both fixing protrusion fixing grooves 41a and 42a so as to be inserted into the fixing hole 31a of the blocking member 30, and a blocking member (on the outer circumferential surface of the support protrusion 43). 30 to form a locking projection (43a) to prevent the fall.

On the other hand, both magnetic contactor bodies 21 and 22 form holder guide grooves 21d and 22d on both upper and lower sides of their corresponding surfaces, and the magnetic contactor body (up and down sides of the holder guide grooves 21d and 22d). The engaging ends 21e and 22e which engage the holder member 50 for engaging 21 and 22 are formed.

The holder member 50 is provided with a locking groove 51 so as to hook the engaging ends 21e and 22e of the holder guide grooves 21d and 22d on one side thereof, and is formed in a “K” shape cross section. .

The interlock device of the magnetic contactor of the present invention as described above has the following effects.

That is, the holder guide grooves 21d and 22d of both magnetic contactor bodies 21 and 22 face each other so that the holder members 50 and 50 are pushed into the holder guide grooves 21d and 22d. . At this time, the engaging groove 51 of the holder member 50 engages the engaging ends 21e and 922e of both holder guide grooves 21d and 22d to bind both magnetic contactor bodies 21 and 22 to each other.

Thereafter, the blocking member 30 is inserted into the interlock receiving portions 21a and 22a of the magnetic contactor main body 21 and 22, and both blocking portions 32 and 33 of the blocking member 30 are each interlock receiving portion. (21a) and (22a) are respectively inserted into the blocking part insertion grooves (21b) and (22b) to connect with each of the movable parts (21A) and (22A), and the fixing part (31) is the front face of the magnetic contactor main body (21) (22). Make it withdraw to the outside.

Thereafter, the support protrusion 43 of the fixing member 40 is fitted to the fixing hole 31a provided at the end of the fixing member 31 of the blocking member 30, and then provided at both ends of the fixing member 40. The fixing protrusions 21a and 42a are fitted into the fixing protrusions 21c and 22c of the magnetic contactor bodies 21 and 22.

In this way, when the movable portion 21A of either of the magnetic contactor main body 21 is powered and pressed in the " A " direction by a crossbar (not shown) as shown in FIG. The one side blocking part 32 of 30 goes down the ground along the above-described blocking part inserting groove 21b of the movable part 21A, while the other blocking part 33 goes up in the "B" direction and the other magnetic contactor. By pushing up the blocking part insertion groove 22b of the main body 22 so that the movable part 22A cannot be lowered, the motor is separated from the phase short circuit that may occur when the two magnetic contactor main bodies 21 and 22 simultaneously operate. It can be protected.

In the interlock device of the magnetic contactor according to the present invention, the interlock receiving portion is engraved on the contact surface of the two magnetic contactor main bodies, and the interlock receiving portion is provided by connecting a blocking member for interlocking with the movable part of each magnetic contactor main body. By reducing the mounting space for installing an interlock to operate only one of the main body of the magnetic contactor, the magnetic contactor can be miniaturized, and the production cost can be reduced by simplifying each component.

Claims (3)

A plurality of magnetic contactor bodies which form an interlock accommodating portion on the surface in contact with each other to be in close contact with each other; A blocking member inserted and installed to conceal the inside of the interlock receiving unit, coupled to the moving parts of both magnetic contactor bodies, and blocking power from being applied to the other magnetic contactor bodies when power is applied to one of the magnetic contactor bodies; An interlock device for a magnetic contactor, comprising: a fixing member coupled to a blocking member and fixedly supported by a magnetic contactor body. The method of claim 1, The blocking member has a fixing hole at its end, The fixing member has a support protrusion having a locking projection to slide into the fixing hole of the blocking member to engage the fixing hole. The method of claim 1, At least one holder guide groove having a locking end is formed in the mutual contact surface of the two magnetic contactors, and at least one holder member inserted together in the holder guide grooves of both magnetic contactor bodies has a locking end of each holder guide groove. An interlock device for a magnetic contactor, characterized in that each engaging groove is formed so as to engage two magnetic contactor bodies with each other.