JPS6237293Y2 - - Google Patents

Description

[Detailed explanation of the idea] This invention relates to an on/off signal extraction device for a switch.

Conventionally, as is well known, an auxiliary switch has been used to take out on/off signals from a switch. However, with this configuration, the ON and OFF signals are taken out during the operation of the main movable contact, so even if the subsequent operation becomes incomplete (incomplete OFF, incomplete ON), it is abnormal. It was not possible to confirm whether the switch was operating properly, and there were concerns about the normal operation of the switch.

The purpose of this proposal is to switch the on/off signal only after the main movable contact has completely turned on/off and stopped.

The present invention will be explained below based on the embodiments shown in the drawings.

In Fig. 1, 1 is the main fixed contact of the switch;
2 is the main movable contact of the switch that comes into contact with and separates from this.

The main movable contactor 2 is connected to the main shaft 4 via a link groove 3.

An escape link 5 is fixed to the main shaft 4. The escape groove 6 of this link 5 has a drive shaft 7
It is engaged so that it can escape.

The drive shaft 7 is driven by an operating source, for example, a pneumatic operating device 8 as shown in FIG. The air operator 8 is
The piston 10 housed in the operating cylinder 9,
It is moved left and right by supplying and discharging pressure fluid based on the opening and closing of valves 11 and 12, and drives a drive shaft 7 connected to a piston rod 13.

The drive shaft 7 is engaged with the elongated hole 15 of the slider 14 in FIG. The length of this long hole 15 is
The stroke is equal to or longer than the stroke of the main movable contact 2. The slider 14 is provided with an escape groove 6 after the drive shaft 7 operates the escape link 5 and finishes the operation of the main movable contact 2.
Since it presses the end of the elongated hole 15 while escaping from the
For the first time, I am forced to move from side to side.

A side surface of the slider 14 is formed with a peak 16 and a valley 17, into which a micro switch 18 for extracting a cut signal is brought into contact.

The slider 14 has slide shafts 19 and 2 at both ends.
0 is provided and supported by bearings 21 and 22.

Although not shown, the micro switch 18 is fixed to the system like the bearings 21, 22, etc.

In the above configuration, when the valve 11 is opened and a pressure medium such as compressed air is supplied to the front surface of the piston 10, the piston 10 moves to the left, and the drive shaft 7 also moves in conjunction with this.

Therefore, the escape link 5,
The main shaft 4 rotates clockwise, and the main movable contact 2 separates from the main fixed contact 1. At this time, since the drive shaft 7 moves within the elongated hole 15, the slider 1
4 will never work. Therefore, the microswitch 18 continues to output the original state, that is, the closed state display signal of the switch.

After passing through the state shown in FIG. 1, the main movable contact 2 reaches a completely disconnected state, the drive shaft 7 escapes from the escape groove 6, and the movable contact 2 stops.

As the drive shaft 7 continues to move to the left, it comes into contact with the left end of the elongated hole 15, and the slider 14 moves to the left. As a result, the crest 16 presses the actuator of the micro switch 18, switches the micro switch 18, and issues an off signal. A stopper is provided at a predetermined location to prevent the piston rod 13 from moving beyond the specified range.

When the switch is closed, the pressure medium on the front surface of the piston 10 is discharged, the valve 12 is opened, and the pressure medium is supplied to the back surface of the piston 10. This causes the piston 10 and the drive shaft 7 to move to the right.

The drive shaft 7 eventually engages the escape groove 6 and operates the escape link 5, bringing the main movable contact 2 into contact with the main fixed contact 1. When the fully closed state is reached, the drive shaft 7 escapes from the escape groove 6, and the main movable contact 2 stops. The drive shaft 7 has a long hole 15
Press the right end of to move the slider 14 to the right.

As a result, the valley 17 comes into contact with the actuator of the micro switch 18, and the micro switch 1
8 switches and converts the cut signal that has been sent out so far into an input signal.

As detailed above, in this invention, an escape link is interposed between the drive shaft and the main movable contact, and the elongated hole of the slider has an elongated hole that is equal to or longer than the operating stroke of the main movable contact. By engaging the shaft and entering the troughs and peaks of the slider, and bringing the micro switch for taking out the cut signal into contact with it, the main movable contact is completely stopped at the normal position of on and off, and then turned on. , it is possible to convert the off signal. Furthermore, during the operation of the main movable contactor, the signal before operation can continue to be output as is.

Therefore, when an incomplete on or incomplete off state occurs, the microswitch continues to output the original signal without switching, so the operator can detect this abnormal situation because the display does not reverse even though the switch is operated. can be discovered immediately.

In this way, it is possible to provide an on/off signal extraction device that obtains on/off signals that correctly correspond to the operating state of the switch.
The structure is not very complicated and has extremely practical effects.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a simplified side view showing the relationship among the main contactor, escape link, and slider, and FIG. 2 is a simplified side sectional view showing the air operating device. 1... Main fixed contact, 2... Main movable contact, 5
...Escape link, 6...Escape groove, 7
... Drive shaft, 8 ... Operation source, 14 ... Slider, 15 ... Long hole, 16 ... Peak, 17 ... Valley, 18 ... Micro switch.

Claims (1)

[Scope of utility model registration request] A drive shaft operated by an operation source is engaged with an escape groove of an escape link to bring the main movable contact into contact with and separate from the main fixed contact, and the length is equal to or longer than the stroke of the main movable contact. Sliders having holes are arranged in parallel, and the drive shaft is engaged with the elongated hole, and the drive shaft escapes from the escape groove to drive the slider, and the peaks and valleys provided on the sides of the slider generate an on/off signal. An on/off signal extraction device for a switch, characterized in that it is configured to change over a micro switch for extraction.