JPH0155534B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an electromagnetic contactor, and even if the terminal screws of the switching contacts are of different types, the auxiliary switch, interlock device, timer device, etc. installed on the electromagnetic contactor according to the purpose can be used in common. It is intended to be.

An embodiment of the invention is shown in FIGS. 1 to 4. That is, this electromagnetic contactor consists of a contactor main body 1, opening/closing contact parts 2a, 2b, and auxiliary parts 3. The contactor body 1 has an upper case 4 and a lower case 5.
A fixed core 6 is installed in the lower case 5 via a cushion 7, and a coil frame 8 is attached to the fixed core 6.
is fitted, and the coil 9 is wound around the coil frame 8. Further, a mounting portion 10 is formed at the outer lower end of the lower case 5, and half of a coil terminal portion 11 is formed at the upper end. The upper case 4 is formed by integrating a movable iron core 12 and a movable frame 13 and is arranged to be vertically slidable, is biased upward by a pair of C-shaped return springs 14, and supported by a locking portion 15. The lower end of the movable core 12 is located within the coil frame 8 and faces the fixed core 6, and a pair of hook protrusions 1 are formed from the upper surface of the movable frame 13.
6 protrudes from the upper surface of the upper case 4. The upper case 4 is integrated with the lower case 5 by passing screws (not shown) through the mounting holes 17 and tightening them to the lower case 5.
When this contactor body 1 passes a predetermined current through the coil 9, the movable core 12 is attracted to the fixed core 6, and the movable frame 13 moves downward against the C-shaped return spring 14.
Along with this, the protrusion 16 descends. When the coil 9 is de-energized, the spring 14 causes the movable frame 13 and the projection 16 to return to their upward movement.

Both opening/closing contact parts 2a and 2b have a contact part consisting of a fixed contact and a movable contact disposed inside, and are opened and closed by moving up and down a movable contact frame 18 having a movable contact, and are fixed on both sides. A plurality of (four in the figure) terminals 18a connected to the contacts are provided and form half of the coil terminal section 11. The movable contact frame 18 has a recess 19 on its lower surface that fits in the protrusion 16 laterally and locks it in the vertical direction, and has the same number of connecting protrusions 20a to 20 as the number of terminals on its upper surface.
d are formed in a line and protrude from the upper surface of the case of the opening/closing contact portions 2a and 2b. Further, the same number of fixing protrusions 21a to 21d are formed on the upper surface of the case in line with the protrusions 20a to 20d. Further, mounting projections 22 are protruded from both sides of the cases 2a and 2b, and mounting rings 23 formed on both sides of the upper case 4 are hooked onto the projections 22 to be connected and fixed. At the same time protrusion 1
6 and the recess 19 are fitted together, and as a result, the movable frame 13
When the movable contact frame 17 moves up and down, the movable contact frame 17 moves up and down, thereby opening and closing the contacts.

The opening/closing contact parts 2a, 2b have different diameters of the terminal screws of the terminals 18a depending on the current capacity; the one in Fig. 1 has a thread diameter of 4 mm, and the one in Fig. 3 has a thread diameter of 3.5 mm. . Since the screw diameters are different, the spacing between the terminals is usually different between FIG. 1 and FIG. 3, resulting in a different overall width. However, in this embodiment, the shape and size of the connecting protrusions 20a to 20d are the same, and the connecting protrusions 20a to 20d at both ends are the same.
Distance from 0d to the side of the case of the closing contact part
a ₁ and a ₂ are kept constant and the distance a ₃ between the two intermediate connecting protrusions 20b and 20c is constant and the same.

In the auxiliary component 3, 25 is an auxiliary contact block, 26 is a timer block, and 27 is an interlock block, which are used as appropriate depending on the purpose.
The auxiliary contact block 25 has connecting protrusions 20a to 20d.
Since they have the same shape and size, they can be fitted and fixed to any one of the fixing protrusions 21a to 21d, and the fitting recess 29 formed in the movable part 28 in the block can be fitted to the connecting protrusions 20a to 20d. Fitted. Therefore, the movable part 28 moves up and down as the opening/closing contact parts 2a and 2b open and close, and the spring 30
A movable contact plate 31 supported by the movable contact plate 31 moves toward and away from a fixed contact (not shown). Further, auxiliary contact terminals (not shown) are provided on both sides of the auxiliary contact block 25.

As shown in FIG. 2, the fitting recesses 33a and 33b of the timer block 26 are dimensioned so that the movable part 32 therein is connected to the two intermediate connecting protrusions 20a to 20d, 20b and 20c. It is removably fixed to the fixing protrusions 21b and 21c. Therefore, this timer block 26 also operates as a timer in conjunction with the operation of the movable contact frame 17. The details of the timer mechanism are the same as those of a general timer, so they will be omitted. In addition, in this embodiment, different types of switching contact parts 2
Connecting protrusions 20b, 2 for both a and 2b
Since the dimensions of 0c are the same, they can be shared.

As shown in FIG.
Two connecting protrusions 20a, 2a and 2b approaching each other
0d, and serves to prevent both contactor bodies 1a and 1b from being turned on at the same time. That is, the horizontal rod 34 at the center of the block 27 is passed through the vertical hole 35a of the eight-shaped locking member 35, and the compression coil spring 36 is interposed between the horizontal rod 34 and the upper end of the hole 35a within the vertical hole 35a. A locking member 35 is supported, and a chevron-shaped fixing portion 37 is disposed opposite to a pointed end 35b at the lower end of the leg of the locking member 35.
On the other hand, movable parts 38a and 38b are arranged at the ends of both arms 35c and 35d of the locking member 35, respectively, so as to be able to move up and down.
c, 35d, and movable parts 38a,
Projection engaging recesses 40a and 40b are formed at the lower end of 38b. Therefore, when one electromagnetic contactor main body 1a operates, the movable part 38a moves downward, so the arm 35c rotates counterclockwise about the other arm 35d, and the pointed end 35b is connected to the chevron-shaped fixed part. 37
It is located on the slope of the fixing part 37 without hitting the top part 37a of the fixing part 37. At this time, even if the other electromagnetic contactor body 1b operates, the locking member 35 tries to rotate clockwise when the movable part 38b moves downward, but cannot rotate because the pointed end 35b collides with the slope. The other electromagnetic contactor main body 1b is in a locked state. On the other hand, when the electromagnetic contactor main body 1b operates first, the electromagnetic contactor main body 1a, which operates later, is similarly locked. Furthermore, when both actuate at the same time, the locking member 35 does not rotate and falls vertically, colliding with the top 37a of the fixing part 37, making it impossible for either to operate.

This interlock block 27 has the dimensional relationship of the connecting protrusions at the ends as described above for each contact portion 2a, 2b.
If the interlock block 27 is kept the same for installation, it can be used not only for the same type of contactor but also for different types of electromagnetic contactors as shown in the figure.

As described above, the electromagnetic contactor of the present invention has a movable contact frame exposed on the upper surface, a plurality of connecting protrusions for attaching auxiliary parts on the upper surface of the movable contact frame, and a plurality of connecting protrusions with mutually different current capacities. In the electromagnetic contactor, the position and shape of each of the connecting protrusions are set so that the same auxiliary parts can be commonly attached, so that the auxiliary switch, interlock device, and This has the advantage that auxiliary parts such as a timer device can be used in common with these electromagnetic contactors.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of one embodiment of the present invention, Fig. 2 is a partially sectional side view, Fig. 3 is a perspective view of different types of switching contacts, and Fig. 4 is a cross section with an interlock device installed. It is a diagram. 3... Auxiliary parts, 18... Movable contact frame, 20a
~20d...Connection protrusion.

Claims (1)

[Claims] 1. A movable contact frame is exposed on the upper surface and a plurality of connecting protrusions for attaching auxiliary parts are provided on the upper surface of the movable contact frame, and the position of each of the connecting protrusions is determined in a plurality of electromagnetic contactors having mutually different current capacities. An electromagnetic contactor characterized by having a shape and a shape such that the same auxiliary parts can be commonly attached.