JPH01124924A - Electromagnetic contactor with surge absorber - Google Patents

Abstract

PURPOSE:To facilitate wiring work of an electromagnetic coil and shorten the work time by making a lead wire terminal position and an input-output terminal of a surge absorbing unit in a body so that they are on a same plane. CONSTITUTION:While a surge absorber unit 8 is detachably mounted on the side wall of an insulation case 5 of an electromagnetic contactor, lead wire terminals 8c, 8d connected via surge absorber elements to lead wires 8a, 8b in addition to lead wires 8a, 8b connected to exciter coil terminals 6a, 6b are arranged on the same plane with input-output terminals 1a, 1b; 2a, 2b; 3a, 3b of a contact piece divide of the electromagnetic contactor. This facilitates wiring work to an exciter coil and shortens the work time because of reduced number of wires for control only and other terminals being located on the same plane.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electromagnetic contactor equipped with a surge absorbing device for suppressing switching surges of an excitation coil.

[Conventional technology]

Examples of this type of electromagnetic contactor are those shown in Figs. 6 and 7.
It is known that the figure shows a front view and a side view. In the figure, the electromagnetic contactor is of a multi-pole type with one input and output terminal 1a, lb; 2 for each of the contact device (not shown).
a, 2b+3a, 3b are arranged side by side on the same plane on the front side of the insulating case 5, and the excitation coil terminal 646b of the electromagnet (not shown) that drives the contactor device is the input/output terminal 1a, lb of the contactor device; 2a.

2b: Provided in a staggered arrangement on the back side of 3a and 3b.

The surge absorption unit 7 is a molded product made of synthetic resin in which a surge absorption element is embedded, one terminal 7a is provided with a metal fitting capable of supporting the main body of the unit 7, and the other terminal 7b is provided with a soldering part. The terminal 7a is connected to the excitation coil terminal 68 by insertion, and the terminal 7b is connected by soldering via the connecting wire 8.

[Problem that the invention seeks to solve]

In such a conventional device, each input/output terminal 1a, lb; 2a, 2b+3a of the contactor device arranged on the front side
.

If 3b is wired first, the wiring work for the excitation coil terminal 646b provided at the back becomes a little difficult.

□ In addition, when connecting the surge absorption unit 7, each of the excitation coil terminals 646b has a total of three electric wires, two including the excitation coil lead wire, and a control electric wire. This has the disadvantage that wiring becomes more difficult and requires longer wiring work.

The object of the invention is to eliminate the above-mentioned drawbacks of the prior art.

To provide an electromagnetic contactor with a surge absorber that facilitates wiring work to an excitation coil terminal and shortens work time.
be.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention has the input and output terminals of a multi-pole contact device arranged side by side on the front side of an insulating case, and An electromagnetic contactor with a surge absorbing device comprising: an electromagnetic contactor provided with an excitation coil terminal of a drive electromagnet; and a surge absorption unit molded from synthetic resin connected between the excitation coil terminals, A positioning guide portion and a connecting portion are provided on opposing side walls of the insulating case and the surge absorbing unit, and the surge absorbing unit is connected to an excitation terminal via a surge absorbing element. A sunrise terminal is provided which is connected to the contact device terminal and is disposed on the same plane as the contact device terminal.

[Effect]

In the electromagnetic contactor with a surge absorption device according to the present invention, the surge absorption unit is detachably attached to the side wall of the electromagnetic contactor, and the lead wire of the surge absorption unit is connected to the excitation coil terminal, and the contact of the electromagnetic contactor is By connecting a control wire to a lead wire terminal provided on the same plane as the slave device terminal and using the lead wire terminal as a lead terminal of the excitation coil, the wiring work is facilitated. In particular, the overall wiring work time, which can be automated by robots, is significantly reduced.

〔Example〕

Figures 1 to 3 are views showing an embodiment of the electromagnetic contactor with a surge absorber according to the present invention, where Figure 1 is a front view and Figure 2 is a side view of Figure 1 viewed from the direction of arrow P. , FIG. 3 is an exploded perspective view of essential parts. In the drawings, the same parts as those of the conventional apparatus shown in FIG. 6 described above are given the same reference numerals, and the differences will be explained. This embodiment differs from the conventional device in that the surge absorption unit 8 is removably attached to the side wall of the insulating case 5 of the electromagnetic contactor, and the excitation coil terminals 5m and 6b are connected to the lead wire 848b. Terminals 8C and 8d for the lead wires connected to the lead wire 848b via the surge absorbing element are placed on the same plane as the input/output terminals 1a, 1b; 2g, 2bs3a, 3b of the contact device of the electromagnetic contactor. This is what we have set up. For this purpose, one side wall of the insulating case 5 is provided with a square hole 51 as a guide and grooves 5b and 5C for joining the upper and lower edges, and the surge absorber 8 has a square protrusion 8e that fits into the square hole 51. and @5b.

Connecting claws 8f, 8f are provided which engage with 5C with a one-touch operation of pushing. As shown in FIGS. 4 and 5, the electromagnetic contactor body includes a multi-pole contact device 20 disposed on the front surface 111 of the insulating case 5, and an electromagnet 25 that opens and closes each contact device 20 at once. It is composed of the following main elements: The contact device 20 includes two stationary contacts 11.11 arranged in a bridging type and spaced apart from each other, and
As shown in FIG. 5, between the opposing fixed contacts 11 and 11, a movable contact support 13 is guided so as to be slidable in the left and right direction, and is provided with a square window 13& corresponding to the number of poles, and a square window 13J1. Each pole surface constant contactor 1 is supported via a contact spring 14.
A movable contactor 15 for bridging and opening between the opposite sides of 1.11 is provided as a main component. Fixed contact 11.11
are input/output terminals 1a, lb: 2g of each contact device
, 2b; 3a, 3b Ic connected. Electromagnet 25
A fixed iron core 21 installed in an insulating case 5, an excitation filter 22 wound around the fixed iron core 21, a movable iron core 23 arranged opposite to the fixed iron core 21 and connected to a movable contact support 13, and a movable iron core 23 shown in FIG. Although not included, the main component is a return spring loaded on the movable iron core 23. Exit wires on both sides of the excitation coil 22 are excitation coil terminals 6m, 6b I
tC is connected.

The operation is performed by excitation of the excitation coil 22, which causes the movable iron core 23 to
When the movable contact 15 is attracted to the fixed iron core 21, the movable contact 15 is connected to the movable iron core 23, and by sliding the nine-way movable contact support 13 to the left, the movable contact 15 bridges between the fixed contacts 11 and 11.

When the excitation of the excitation coil 22 is cut off, the movable core 23 is returned to the right side by the spring force of a return spring (not shown), and the movable contact 13 releases the space between the fixed contacts 11 and 11.

In the above configuration, according to this embodiment, the surge absorption unit 8 is attached to the side wall of the electromagnetic contactor, and the output wire 8b of the surge absorption unit 8 is connected to the excitation coil terminal 5 flattened 5b, and one output wire 8a is connected to the excitation coil terminal 5 flat 5b. , 8b Input/output terminal 1a of the contact device connected via the GC surge absorption element.

Since the lead wire terminals 8c and gd provided on the same plane as 1b; 2a, 2b; 3a, and 3b are used as the lead terminals of the excitation coil 22, the wiring to the excitation coil 22 is limited to the control wiring only. Since the number of wires is reduced and the terminals are on the same plane as other terminals, it becomes easier and the working time is shortened, and automatic wiring by a robot or the like becomes possible.

〔Effect of the invention〕

According to this invention, nine outgoing wire terminals are provided which are connected to the surge absorbing coil terminal via the surge absorbing element, and the position of the outgoing wire terminals is the same as the input/output terminal of the contact device. By integrating the coils so as to form a flat surface, the wiring work of the excitation coil is facilitated, the work time is shortened, and it is possible to provide an electromagnetic contactor with a surge absorber that can be automatically wired.

[Brief explanation of the drawing]

1 to 3 are diagrams showing an embodiment of the electromagnetic contactor with a surge absorber according to the present invention, in which FIG. 1 is a front view and FIG. 2 is a side view of FIG. 1 viewed from the direction P. , FIG. 3 is an exploded perspective view of essential parts, FIGS. 4 and 5 are front and longitudinal sectional views of the electromagnetic contactor according to the present invention, and FIGS. 6 and 7
The figure shows an example of a conventional electromagnetic contactor with a surge absorber, and shows the sixth case, 5a...square hole, ' 5b, 5
0... Groove, 5a, 5b... Excitation Fig. 1 Fig. 2 Fig. 3 Fig. 4 Fig. 5 Fig. 6 Fig. 7

Claims (1)

[Claims] 1) An electromagnetic contactor in which input and output terminals of a multi-pole contactor device are arranged side by side on the front side of an insulating case, and an excitation coil terminal of a driving electromagnet is provided on the back side thereof, and the excitation coil terminal. In an electromagnetic contactor with a surge absorbing device, the insulating case and the surge absorbing unit are formed on opposing side walls of the insulating case and the surge absorbing unit so as to be removably attached to each other. a positioning guide portion and a coupling portion, and the surge absorbing unit is provided with a lead wire terminal connected to the excitation coil terminal via a surge absorbing element and disposed on the same plane as the contact device terminal. An electromagnetic contactor with a surge absorption device characterized by: