JPS635142Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electromagnetic contactor or electromagnetic switch (hereinafter referred to as "switch") equipped with a mechanical interlocking device.

[Prior art and its problems] Generally, for example, when performing reversible operation of a motor using two switches, an electrical interlocking device is used to avoid simultaneous closing of both switches due to external shocks, etc. In addition, a mechanical interlocking device is provided.
Since this mechanical interlocking device is provided parallel to the direction in which the switches are arranged side by side, it is necessary to leave a certain amount of space between the switches in order for the mechanical interlocking device to operate smoothly. This has the disadvantage that the overall size of the switch increases and the installation area also increases.

In addition, in a well-known switch, when one switch is closed and the other switch is energized due to an erroneous signal to close the switch, the interlocking lever that is interlocked by the other switch is activated. , its movement is blocked by the interlocking lever that is interlocked with one of the switches, but even if the closing signal of one switch is released in this state, the interlocking lever that is interlocked with the other switch will not move. , the interlocking lever linked to one switch was suppressed by the excitation of the other switch, so the contacts of one switch remained closed and the load was not released, which was dangerous.

[Purpose of the present invention] The present invention solves these drawbacks, simplifies the structure, saves space, and even if one switch is energized while the other is energized, It is an object of the present invention to provide a safe switch in which the contacts of the switch are opened without being restricted when the closing signal of the switch is released.

[Structure of the device] The present device has the following features: (a) On a plane orthogonal or almost orthogonal to the switches arranged in parallel, the switches are arranged side by side on the same plane and are rotated in conjunction with different switches. A pair of plate-shaped levers are arranged, and the tips of the plate-shaped levers are mutually opposed to the other plate-shaped lever, and the tip of the plate-shaped lever has the function of operating the one plate-shaped lever. At times, a locking part is provided to prevent the other plate-shaped lever from rotating, and this locking part is formed in an arc shape centered on its own rotational axis. Each has a notch that allows the other plate-like lever to rotate,
The notch is formed with a stop part and an arcuate abutting part that is approximately concentric with the locking part of the other plate lever, and an acute-angled tip is formed at the intersection of the locking part and the abutting part. (b) an elastic body that biases the opposing projecting ends of the plate-like lever in a direction to separate them when the switch is not closed; This is a switch with a reciprocal locking device characterized by being provided with a transmission means for driving a plate-shaped lever.

[Example] An embodiment of the present invention will be described based on the drawings.

Between the switch 1 and the switch 2 which are arranged in parallel, the switch 1 and the switch 2 are arranged in parallel on a plane that is orthogonal or almost orthogonal to the direction in which the switches 1 and 2 are arranged side by side, and have the same plane, and each is linked to a different switch. A pair of plate-like levers 3 and 4 that are rotated are provided.

On the opposing side walls 11 and 21 of the switches 1 and 2,
Window holes 12 and 22 for transmitting the movement of movers 5 and 6 interlocked with the movable iron core to a transmission means to be described later.
form. The window holes 12 and 22 have the window holes 12 and 2
2 is cut out, and the peripheral edges of the notched portions 71, 81 are bent to form hooking portions 72, 82, while rotating shafts 73, 8 on which the plate levers 3, 4 rotate.
A pair of clamping fittings 7 and 8 having 3 protruding from each other are attached.

When the switches 1 and 2 are closed, the switches 1 and 2 rotate the plate levers 3 and 4 via a transmission means that drives the interlocking plate levers 3 and 4 only in the closing direction. , 2, the switches 1, 2 are opened without being restrained by the plate levers 3, 4. This transmission means has protrusions 31, 41 formed at arbitrary positions on the plate-like levers 3, 4, and engaging pins 32, 42 are erected on these protrusions 31, 41.
Although the structure is such that the movable members 5 and 6 of the switches 1 and 2 are inserted into the window holes 12 and 22 formed in the switches 1 and 2 and engaged with the movers 5 and 6 of the switches 1 and 2, the structure is not limited to this. In this case, the movers 5 and 6 are the engagement pins 32,
42 only in the closing direction, and the mover 5,
When 6 moves in the opening direction, the engagement pins 32, 4
2 so as not to be restricted.

The tip ends of the plate-like levers 3, 4 are bent toward the other plate-like lever 4, 3, and are mutually opposed to the other plate-like lever. Locking parts 34, 44 are provided at the tips of the plate-like levers 3, 4 to prevent rotation of the other plate-like lever 4, 3 when one plate-like lever 3, 4 is activated.
4 and 44 are their own rotational axes as shown in FIG.
That is, it is formed in an arc shape centered on the shaft holes 78, 88.

At the inner tips of the locking parts 34 and 44, there are cutout parts 3 that allow the other plate levers 3 and 4 to rotate.
3, 43 are provided, and the notches 33, 43 have stop parts 33a, 43a and the other plate-like lever 3, 4.
An arcuate contact portion 3 approximately concentric with the locking portions 34, 44 of
3b and 43b are formed (see FIG. 5).
And the locking parts 34, 44 and the contact parts 33b, 43b
The points where they intersect are acute-angled prongs 33c and 43c.
are formed, and the respective protruding ends 33c and 43c are opposed to each other.

In this way, the opposing projecting ends 33c and 43c form an acute angle, so that even if closing commands are issued to the switches 1 and 2 almost simultaneously, the switch that is earlier will
For example, the locking portion 34 of the plate lever 3 linked to the switch 1 can easily slide into the notch 43 of the plate lever 4. Furthermore, since the notch portion 43 and the locking portion 34 fit together, the contact area is wide, and the movement of the plate-shaped lever 4 is reliably restrained. Note that 9 is a coil spring that returns the plate-shaped levers 3 and 4 to their original positions, and acts in a direction to separate the opposed protruding ends 34 and 44 from each other.

Next, the operation will be explained with reference to FIGS. 2, 3, and 5. When one switch 1 is turned on, the movable element 5 moves downward and engages with the movable element 5. The engagement pin 32 in the plate lever 3 is pushed down, the plate lever 3 rotates clockwise against the coil spring 9, and the locking part 34 of the plate lever 3 is locked in the notch 4 of the plate lever 4.
Inserted into 3. Even if the other switch 2 is attempted to be closed in this state, the locking portion 34 prevents the plate-like lever 4 from rotating, thereby preventing the other switch 2 from closing.

Similarly, when the other switch 2 is closed, one switch 1 is prevented from closing.

Furthermore, after one switch 1 is closed, when the other switch 2 is attempted to close, the plate lever 3 is held down by the plate lever 4 that interlocks with the other switch 2. However, when the excitation of one switch 1 is released, the movable element 5 rises regardless of the movement of the plate lever 3, and the contacts of one switch 1 become open.

[Effect of the idea] The present invention has the above configuration and produces the following effects.

(1) Since the gap between the switches installed in parallel is only about the thickness of the plate lever, the entire switch can be made smaller and the installation area can be narrower.

(2) Since the opposing prongs are at acute angles, even if closing commands are issued to both switches at almost the same time,
The locking portion of the plate-like lever that is interlocked with the earlier switch can slide into the notch of the plate-like lever of the other switch, thereby preventing the other switch from being closed.

(3) Since the abutting part and the locking part have approximately the same radius of curvature, they fit and abut sufficiently, the contact area is wide, and the movement of the plate lever of the switch on the non-closing side is reliably stopped. Further, when releasing the interlock, there is no catching part and since there is a stop part, the plate-shaped lever does not go too far, and the interlock can be released smoothly.

(4) Even if one switch is closed and the other switch is attempted to close, the switch is opened via a transmission means that is not restricted by the interlock device. So,
When one switch is de-energized, the contact becomes open regardless of the movement of the plate lever, and the load is reliably released.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway front view of a switch incorporating the present invention, Figure 2 is a sectional view taken along the - line in Figure 1, and Figure 3 is a schematic diagram of the switch incorporating the present invention. FIG. 4 is a partially cutaway front view showing an embodiment of the present invention, and FIG. 5 is a front view showing the operating state of the plate-like lever. 1, 2... Switch, 3, 4... Plate lever, 9
...Coil spring, 31,41...Protrusion piece, 32,4
2... Engaging pin, 33, 43... Notch, 33
a, 43a... Stop portion, 33b, 43b... Contact portion, 33c, 43c... Tip end portion, 34, 44...
Locking part, 73, 83... Rotation axis.

Claims (1)

[Claims for Utility Model Registration] (a) A pair of switches installed side by side with the same plane on a plane perpendicular or nearly perpendicular to the switches installed side by side and each rotated in conjunction with a different switch. A plate-like lever is arranged, and the tips of the plate-like levers are arranged to cross each other and face each other, and when one of the plate-like levers is operated, a A locking part that prevents the other plate-shaped lever from rotating is provided, and this locking part is formed in an arc shape centered on its own rotational axis. A notch is provided to allow rotation of the other plate-like lever,
The notch is formed with a stop part and an arcuate abutting part that is approximately concentric with the locking part of the other plate lever, and an acute-angled tip is formed at the intersection of the locking part and the abutting part. (b) an elastic body that biases the opposing projecting ends of the plate-like lever in a direction to separate them when the switch is not closed; A switch with an interlocking device characterized by being provided with a transmission means for driving a plate-shaped lever.