JP2504436B2 - Reversible electromagnetic contactor - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a reversible electromagnetic contactor applied to switching between normal rotation and reverse rotation of a motor, switching of star-delta connection, and the like.

[Background technology]

Reversible type electromagnetic contactor of this type, for example, as shown in FIG. 11, the exciting coil L, L ', normally closed contacts Q, Q' and 3 phases of normally open contacts P ₁ ~P _3, P ₁ ' To P ₃ ′ and a pair of electromagnetic contactors S, S ′ each having these terminals R _{1 to} R ₁₀ , R ₁ ′ to R ₁₀ ′ are arranged next to each other, and terminals R _{1 to} R ₁₀ , R
Wire the normally open contacts P _{1 to} P ₃ , P ₁ ′ to P ₃ ′ of ₁ ′ to R ₁₀ ′ so that the two phases are interchanged, and the exciting coil L,
Interlock wiring is provided between L'and the normally closed contacts Q, Q '. E is a power source, S ₁ is a power switch, S ₂ is a reversible changeover switch, T ₁ is an electric wire connecting terminals R _{1 to} R ₁₀ and R ₁ ′ to R ₁₀ ′, T
₂ is an electric wire (shown by a thick line) connected to the outside.

However, this reversible electromagnetic contactor uses the wires T ₁ , T ₂
Since it was wired with a vinyl electric wire, the wiring was complicated and the connection was troublesome, and there were drawbacks that wiring mistakes were likely to occur.

[Object of the Invention]

An object of the present invention is to provide a reversible electromagnetic contactor which can be extremely easily wired and can prevent wiring mistakes.

[Disclosure of Invention]

The reversible electromagnetic contactor of the present invention has a pair of electromagnetic contactors, which have an exciting coil, a normally-closed contact, and a normally-open contact, and terminals for connecting these external electric wires, and are arranged next to each other, and Of the electromagnetic contactor having a connecting terminal directly connected to the terminals of the exciting coil and the normally-closed contact, and having a built-in wiring portion interlocking between the connecting terminals and mounted across the pair of electromagnetic contactors. And an interlock block provided.

According to the configuration of the present invention, since the interlock wiring is formed by directly connecting the connection terminal of the interlock block to the terminal for connecting the external electric wire of the electromagnetic contactor, the structure is simple without increasing the number of terminals. It is easy to assemble, the wiring work can be extremely simplified, and wiring mistakes can be prevented. Further, the interlock block allows the pair of electromagnetic contactors to be spaced from each other.

Embodiment An embodiment of the present invention will be described with reference to FIGS. 1 to 10. That is, this reversible electromagnetic contactor has an exciting coil 17, a normally-closed contact 32, and a normally-open contact 28 and also has a pair of terminals 30 and 31 for connecting these external electric wires, which are arranged adjacent to each other. The contactors 6 and 7 and the exciting coil 17 of the pair of electromagnetic contactors 6 and 7 and the connecting terminals 36 directly connected to the terminals 30 and 31 of the normally-closed contacts 32 are provided, and the interlock wiring between the connecting terminals 36 ( The interlock block 8 is built in the wiring section 40 which is T ₄ ), and is mounted over the pair of electromagnetic contactors 6 and 7.

The pair of electromagnetic contactors 6 and 7 are provided with normally open contacts 28 for three phases, and are arranged so that the movable parts 4 and 5 face each other in the direction in which they are operated by the excitation operation. The movable parts 4 and 5 move forward in the opposing direction of the side surfaces 2 and 3 of the bases 1 and 1'with the excitation operation. These electromagnetic contactors 6 and 7 are attached to the base 9 by mounting screws 11 so that the one side faces 2 and 3 of the device bases 1 and 1'oppose each other at regular intervals. The movable parts 4,5 are movable frames, and the projecting holes 15 are formed in the surfaces 2a, 3a of the electromagnetic contactors 6, 7, and the projecting holes 15 project the projections 4a, 5a of the movable parts 4,5.
Is protruding.

The interlock block 8 is integrally formed of a wiring portion 40 having a connection terminal 36 and a molding resin 37 covering the wiring portion 40, and also serves as a protective cover for the pair of electromagnetic contactors 6, 7. There is. As shown in FIG. 2, the wiring portion 40 includes a printed wiring board 41 and connection terminals 3 corresponding to the terminals 30 and 31.
6 and the interlock wiring T ₄ between the connection terminals 36
Then, the wiring T ₃ for switching the two phases between the normally open contacts 28 is patterned. The molding resin 37 is formed by molding the surface of the wiring portion 40 with the molding resin 37 so that the connection terminals 36 are exposed, and forming the terminal covers 38 through the thin hinge portions 39 so as to cover the connection terminals 36 on both sides. ing. In addition to providing a plurality of claws 12 on the lower surface of the mold resin 37,
As shown in the figure, a loose fitting hole 8a is formed corresponding to the protrusions 4a, 5a, a guide recess 8b is formed between the loose fitting holes 8a, and a holding plate 8c is installed at the center of the guide recess 8b. There is.

The interlock member 10 is slidably fitted in the guide recess 8b, and the central portion of the interlock member 10 is held by the holding plate 8c. The interlock member 10 is formed of a strip-shaped plate and has recesses 10a and 10b formed at both ends thereof. On the other hand, the locking holes 13 are formed in the surfaces 2a, 3a of the electromagnetic contactors 6, 7 corresponding to the claws 12, and the claws 12 are locked in the locking holes 13 so that the recesses 10a, 10b of the interlock member 10 are formed. Engage with the protrusions 4a, 5a. As a result, both ends of the interlock member 10 are positioned between the protrusions 4a and 5a of the movable parts 4 and 5, and the operation of the movable parts 4 and 5 is prevented in the one operating state of the movable parts 4 and 5.

According to this embodiment, since the connecting terminal 36 of the interlock block 8 is directly connected to the external wire connecting terminals 30 and 31 of the electromagnetic contactors 6 and 7, the interlock wiring (T ₄ ) is provided. The structure is simple and easy to assemble without increasing the number of terminals, and the wiring work can be extremely simplified, and wiring mistakes can be prevented. In addition, a pair of electromagnetic contactors 6, 7 are provided by the interlock block 8.
Can be spaced from each other.

In addition, in this embodiment, the interlock member 10 is provided between the protrusions 4a and 5a of the movable parts 4 and 5 which protrude from the surfaces 2a and 3a of the electromagnetic contactors 6 and 7.
The mechanical interlock is ensured because of the interposition.

Further, since the interlock block 8 is provided with the terminal cover 38, it is possible to easily prevent the exposed portions of the connection terminal 36 and the terminals 30 and 31 from being exposed.

Further, since the interlock member 10 can be incorporated after disposing the pair of electromagnetic contactors 6 and 7, the assembly becomes easy.
In addition, the interlock member 1 can be operated without moving the electromagnetic contactors 6 and 7.
Since the 0 can be replaced, the interlock member 10 can be easily replaced. Furthermore, since the interlock member 10 is provided on the interlock block 8, the interlock member 10 can be directly attached to the movable part.
The interlock member 10 does not drop even if the interlock block 8 is removed, as compared with the case where the interlock member 10 is disposed between the four and five. Further, since the interlock block 8 with the interlock member 10 is provided, mechanical interlock is possible, so that workability is improved.

The interlock block 8 is used to interlock the members.
Since the 10 is concealed, the operation of the interlock member 10 is not hindered by foreign matter from the outside, such as an electric wire at the time of connection. Further, since the interlock block 8 is mounted so as to connect the electromagnetic contactors 6 and 7 so as to be connected to each other, the interlock block 8 also serves as spacing between the electromagnetic contactors 6 and 7. Is stable, the interlock operation accuracy of the interlock member 10 is stable without variations in the interlock operation of the interlock member 10.

8 to 10 show the internal structure of the electromagnetic contactor 7 (the electromagnetic contactor 6 has the same structure). Ie 16
Is an electromagnet, and is a coil frame 16a, an exciting coil 17, a plunger 18, a permanent magnet 19, a support spring 20, and a yoke 2 sandwiching the permanent magnet 19.
It is composed of 1,22. 23 is a lever and the middle part is a shaft 24
Is pivotally supported by the base 1 ', one end of which is coupled to the coupling frame 18a of the plunger 18 by the shaft 25, and the other end of which is engaged with the lever receiving portion 26 of the movable portion 5. Instrument base 1'is case cover 27
The movable portion 5 is disposed on the case cover 27 so as to be movable in a direction parallel to the plunger 18. In the movable part 5, 28a is a fixed side of the normally open contact 28, 29 is a contact pressure spring, 32a is a movable side of the normally closed contact 32, and 33 is a return spring. Terminal
Reference numeral 31 denotes a terminal for the exciting coil 17, which is elastically connected to the coil terminal connection coil 34 provided on the coil frame 16a and connected to the coil 17. 35 is a DIN rail mounting hook.

When the terminal 31 is energized, the plunger 18 moves in the direction of arrow a by excitation and the lever 23 rotates about the shaft 24, so that the movable portion 5 moves in the direction opposite to the direction of arrow a. As a result, the normally open contact 28 contacts the opposing fixed side 28a, and the normally closed contact 32 separates from the movable side. At the same time, the movement of the movable portion 5 pushes the interlock member 10 in the direction opposite to the arrow a to prevent the movement of the movable portion 4 of the adjacent electromagnetic contactor 6. When the energization is released, the return spring 33 moves the movable part 5 in the same direction as the arrow a, and the plunger 18 returns via the lever 23. This action of the interlocking member 10 mechanically interlocks the electromagnetic contactor 7 when the electromagnetic contactor 6 is excited.

In the present invention, the movable parts 4 and 5 may be levers, plungers or the like. Further, the interlock member 10 has recesses 10a and 10b formed at both ends, but the recesses 10a and 10b
May not be required.

In addition, the interlock block 8 is formed by punching and bending a conductive plate to form a wiring portion 40 having an interlock wiring and a connection terminal, and a resin covering the surface of the wiring portion 40 is formed by simultaneous molding. Good.

Further, the wiring between the normally-open contacts 28 is not limited to the wiring for switching the two phases in the above-described embodiment, but can be applied to other wiring.

〔The invention's effect〕

According to the reversible electromagnetic contactor of the present invention, since the interlock wiring is achieved by directly connecting the connection terminal of the interlock block to the terminal for connecting the external electric wire of the electromagnetic contactor, the number of terminals can be increased without increasing the number of terminals. The structure is simple and easy to assemble, the wiring work can be extremely simplified, and wiring mistakes can be prevented. Further, the interlock block has an effect that the pair of electromagnetic contactors can be spaced from each other.

[Brief description of drawings]

1 is a perspective view of an embodiment of the present invention with an interlock block removed, FIG. 2 is a perspective view of a printed wiring board, FIG. 3 is a partial sectional view showing a terminal cover, and FIG. Type electromagnetic contactor front view, FIG. 5 is a partial cross-sectional view showing a locked state of the interlock block, FIG. 6 is a cutaway perspective view of the interlock block seen from the back side, and FIG. 7 is a part of the interlock block. Sectional view, FIG. 8 is a broken plan view of the electromagnetic contactor, FIG. 9 is a longitudinal sectional view thereof, and FIG. 10 is FIG.
FIG. 11 is an interlock wiring diagram of the reversible electromagnetic contactor taken along the line. 6,7 ... Electromagnetic contactor, 8 ... Interlock block, 17
…… Excitation coil, 28 …… Normally open contact, 30,31 …… Terminal, 32
...... Normally closed contact, 36 …… Connection terminal, 40 …… Wiring part, T ₃ ……
Wiring, T ₄ …… Interlock wiring

Claims (4)

(57) [Claims] 1. A pair of electromagnetic contactors, which have an exciting coil, a normally-closed contact, and a normally-open contact, and also have terminals for connecting these external electric wires, and are arranged next to each other, and a pair of the electromagnetic contactors. An interlock block having a connecting terminal directly connected to the exciting coil and the terminal of the normally-closed contact and having a built-in wiring part interlocking between the connecting terminals and attached across the pair of electromagnetic contactors. And a reversible electromagnetic contactor. 2. The wiring portion has a connection terminal directly connected to the terminal of the normally open contact, and a wiring whose two phases are switched when switching the pair of electromagnetic contactors is provided between the connection terminals. The reversible electromagnetic contactor according to claim (1). 3. The pair of electromagnetic contactors are arranged so as to face each other in a direction in which the movable part operates by an exciting operation, and the movable part projects from each surface of the electromagnetic contactor. The reversible electromagnetic device according to claim (2), wherein the lock block has an interlock member that is located between the movable portions and that prevents one of the movable portions from operating in the other operating state. Contactor. 4. The reversible electromagnetic contactor according to claim 3, wherein the interlock block has a terminal cover for opening and closing the connection terminal and the terminal for connecting the external electric wire.