KR100404302B1 - An automatic remote operating apparatus and control circuit of lockout switch - Google Patents

Abstract

The present invention relates to a lockout switch driving device and a drive control circuit, and in the related art, an operator has to manually rotate the rotary knob manually in order to switch the tripped lockout switch to a reset state. In order to provide a lockout switch driving device and a driving control circuit which can remotely control the switching of the lockout switch in the trip state to the reset state, one end of the lockout switch is coupled to the drive shaft of the lockout switch to trip the lockout switch or A rotating shaft rotating together with the driving shaft when converted to a reset state; Rotational force generating means for generating a rotational force for switching the rotating shaft in the tripped state to a reset state while operating by a reset signal; An electromagnetic clutch unit coupled between the rotating shaft and the rotating force generating means and transmitting or blocking the rotating force of the rotating force generating means to the rotating shaft; When the rotational force is transmitted through the electromagnetic clutch unit to rotate the tripped rotary shaft to the reset state, when the lockout switch is switched to the reset state, the rotational force generation of the rotational force generating means is stopped and the transmission of the rotational force of the electronic clutch unit is stopped. Rotational force blocking means; And a drive control circuit for controlling the rotation force generating means, the electromagnetic clutch unit, and the rotation force blocking means.

Description

An automatic remote operating apparatus and control circuit of lockout switch

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lockout switch drive device and a drive control circuit. More particularly, the present invention relates to a lockout switch drive device and a drive control circuit capable of automatically switching to a reset state when the lockout switch is tripped. It is about.

In general, a cam switch (also called a lockout switch) is a safety circuit that blocks the remaining electrical contacts at the same time when one of the electrical circuits is abnormal in a plurality of electrical circuits mainly connected to a power plant, substation, or general electric workpiece. It is a switch used to prevent the occurrence of an accident. When a conventional cam switch is tripped, the cause of the trip should be reset after resolving the cause of the trip. When the operator rotates the rotary knob at a predetermined angle to reset the cam switch, the drive shaft is locked while being interlocked, thereby connecting a plurality of connected electrical contacts.

When an abnormal state occurs in a circuit connected by any one of the plurality of connected electrical contacts, the locked driving shaft is unlocked and rotates in the reverse direction to simultaneously block the remaining connected electrical contacts, thereby tripping. .

However, such a conventional cam switch has an inconvenience that the operator has to go out and manually rotate the rotary knob when trying to switch from the trip state to the reset state, and use a large force to rotate the rotary knob. This was a very difficult issue.

In particular, since the electric devices operated by the cam switches are installed indoors or outdoors away from the central control panel, the lockout switch is installed indoors or outdoors. Therefore, the cam switch in the trip state is reset to the reset state. In order for the operator to manually find the lockout switch is installed, there is an inconvenience to operate manually, and the cam switch is distributed in several places, there is an inconvenience that intensive maintenance and management is not easy. An example of a lockout switch invented and patented by the same inventor in order to solve the inconvenience of a switch is filed December 21, 1996 to the application number 10-1996-0069655, and Patent Publication No. 1998-0050810 to 1998 09 As described in the publication specification of Patent No. 204558, published May 15 and registered March 29, 1999. The lock-out switch disclosed in Fig. 13 has a plurality of contacts 410 and a drive shaft 430 for opening and closing the contacts. When the drive shaft is rotated with the knob 450, it corresponds to the rotation of the drive shaft. Even if the contacts are turned on or off and reset, a driving device for automatically resetting the cam switch that is automatically tripped when a circuit connected to the contacts 410 malfunctions is provided. It describes in detail the driving device for generating a driving force by the electric motor to rotate the motor. The control circuit for controlling the drive device includes a motor having a rotational force for rotating the drive shaft, a relay having a contact connecting the power supply and the motor to apply a drive voltage to the motor, and an optical sense for the relay. And a second power supply circuit for applying a voltage, and a second power supply circuit for applying an operating voltage to the relay. The detailed description of the prior art here is referred to the above patent specification. The inventor of the present invention has been made to provide a structure and a control circuit that can be more convenient and more reliable operation than the conventional lock-out switch. .

An object of the present invention is to provide a lock-out switch driving device and a drive control circuit which can be automatically switched at a long distance even when the cam switch is switched to a reset state without a manual manual switch by applying excessive force.

Accordingly, the lockout switch driving device according to the present invention is a lockout switch remote control device for switching to a reset state when a lockout switch having a drive shaft for turning on or off a plurality of contacts is tripped, A rotation shaft coupled to one side of the driving shaft to rotate together with the driving shaft when the lockout switch is switched to a trip or reset state; Rotational force generating means for generating a rotational force for switching the rotating shaft in the tripped state to a reset state while operating by a reset signal; An electromagnetic clutch unit coupled between the rotating shaft and the rotating force generating means and transmitting or blocking the rotating force of the rotating force generating means to the rotating shaft; When the rotational force is transmitted through the electromagnetic clutch unit to rotate the tripped rotary shaft to the reset state, when the lockout switch is switched to the reset state, the rotational force generation of the rotational force generating means is stopped and the transmission of the rotational force of the electronic clutch unit is stopped. Rotational force blocking means; And a drive control circuit for controlling the rotation force generating means, the electromagnetic clutch unit, and the rotation force blocking means.

1 is a partially exploded perspective view of a lockout switch drive device according to the present invention;

2 is a plan view in a state in which the lockout switch driving device according to the present invention is coupled;

3 is a partial cross-sectional view in a state in which the lockout switch driving device according to the present invention is coupled to the lockout switch.

4A and 4B are a plan view and a sectional view for explaining a front bracket of a lockout switch driving apparatus according to the present invention;

5A and 5B are a plan view and a sectional view for explaining a rear bracket of a lockout switch driving apparatus according to the present invention;

6A and 6B are a plan view and a sectional view for explaining a disk of the lockout switch driving apparatus according to the present invention;

7A and 7B are a plan view and a sectional view for explaining a magnetic disk of the lockout switch driving apparatus according to the present invention;

8A and 8B are a plan view and a sectional view for explaining a worm wheel of the lockout switch driving apparatus according to the present invention;

9A and 9B are a plan view and a sectional view for explaining a slip ring of the lockout switch driving apparatus according to the present invention;

10A and 10B are a plan view and a cross-sectional view for explaining an insulating ring of the lockout switch driving apparatus according to the present invention;

11 is a view for explaining a trip state of the lockout switch driving apparatus according to the present invention;

Fig. 12 is a block diagram for explaining a drive control circuit of a lockout switch driving apparatus according to the present invention. Fig. 13 is a schematic cross-sectional view for explaining a conventional lockout switch.

1: Lockout switch 2: Lockout switch drive shaft

10: rotating shaft 20: housing

22: drive motor 24: reduction gear

25: worm gear 26: worm wheel

30: clutch case 31: electronic disk

34: insulation ring 35: slip ring

36: disk 40: limit switch

41: protrusion 50: return spring

100: reset state maintaining unit 200: switching unit

300: delay unit 400: photocoupler unit

500: Trip state holding part

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the lockout switch driving apparatus and drive control circuit according to the present invention.

1, 2 and 3, the lockout switch driving apparatus according to the present invention is coupled to the drive shaft 2 of the conventional lockout switch 1, and the lockout switch in the trip state is automatically reset by rotating the drive shaft automatically. It is to be automatically switched by remote control.

The lock-out switch driving device according to the present invention has both ends coupled to the rotary shaft 4 and the drive shaft 2 of the lock-out switch 1, respectively, to the trip position or the reset position simultaneously with the trip or reset of the lock-out switch. The rotating shaft 10, the rotation force generating means for generating a rotational force for rotating the tripped rotary shaft 10 while being operated by a reset button (not shown), and receives the rotational force of the rotational force generating means transmitted to the rotating shaft 10 When the rotational force is transmitted through the electronic clutch unit (EC) and the electromagnetic clutch unit, the rotated rotary shaft is rotated to the reset position, and when the tripped lockout switch is switched to the reset state, the rotational force is generated by the rotational force generating means and the rotational force of the electronic clutch unit. Rotation force interruption means for interrupting transmission, and drive control circuit for controlling rotation force generation means, electronic clutch unit, and rotation force interruption means Including takes place.

More specifically, the rotation shaft 10 is made by combining the front bracket 30-1 and the rear bracket 30-2 shown in FIGS. 4A, 4B and 5A, 5B, and the front bracket 30-1. One side (B) of the) is formed in a half arc shape, one side (B ') of the rear bracket (30-2) is installed through the clutch case 30 formed in a flat, knob of the rotary knob (4) on one end side The shaft receiving groove is formed and the switch drive shaft insertion groove of the lockout switch 1 is formed at the other end side, so that the rotary knob 4 and the drive shaft 2 of the lockout switch are respectively coupled to both end sides.

Therefore, when the rotation shaft 10 rotates, the drive shaft 2 of the lockout switch 1 is rotated, and the drive shaft 2 of the tripped lockout switch is rotated and locked so that the reset state is the same as that of the drive shaft. Keep it.

On the contrary, when the lockout switch 1 in the reset state is switched to the trip state, the drive shaft 2 of the lockout switch is unlocked and rotates in reverse, and the rotation shaft 10 interlocks and rotates in reverse.

The rotational force generating means is attached to the open one side surface (B, B ') of the clutch case 30 and the housing (30) formed in a semi-circular arc shape in which a contact surface (A) with the clutch case is formed with a cutout groove (21); A drive motor 22 installed inside the housing and operated by an external reset button, first and second reduction gears 24a and 24b meshed with the drive shaft 23 of the drive motor to reduce the rotation ratio; 2 is installed in the clutch case 30 and the worm gear 25 in which the gear train is partially exposed to the outside of the housing 30 through the cutting groove 21 of the housing and rotated by being engaged with the reduction gear 24b. And a worm wheel 26 (refer to FIGS. 8A and 8B) that is exposed to the opened one side surface B.B 'and is engaged with the worm gear 25 exposed through the incision groove 21 to rotate.

The electromagnetic clutch unit EC is fixed to one surface of the worm wheel 26 installed in the case 30 by means of rivets 33, and magnetic disks 31 (see FIGS. 7A and 7B) interlocked when the worm wheel is rotated. Insulation ring (34, Fig. 10a, 10b) is installed on the outer periphery of the insulating ring, and is installed on the outer periphery of the insulating ring and the direct current is applied to the magnetic coil 32 of the magnetic disc through the conductive wire (36) ) And the first and second slip rings (35a, 35b, see FIGS. 9a, 9b) for generating electromagnetic force, and the direct current power is applied to the first and second slip rings, And a disk 37 (see Figs. 6A and 6B) fixed to the rotary shaft 10 by a fixing screw 38.

Therefore, when the DC power is applied to the magnetic disk 31, the electromagnetic clutch unit EC generates an electromagnetic force to connect the disk 37 and the magnetic disk 31, and when the worm wheel 26 of the rotation force generating means rotates. The disk and the magnetic disk rotate at the same time. As a result, the rotation shaft 10 fixed to the disk 31 and the drive shaft 2 of the lockout switch rotate simultaneously, so that the lockout switch 1 is reset.

In addition, the electronic clutch unit EC separates the disk 37 and the magnetic disk 31 when the DC power applied to the magnetic disk 31 is interrupted while the lockout switch 1 is reset. Even if this rotation is performed, the magnetic disk 31 is rotated, but the disk 37 is not rotated so that the rotational force is not transmitted to the rotation shaft 10 so that the lockout switch 1 maintains the reset state.

A bearing 39 is provided between the magnetic disk 31 and the rotary shaft 10 of the electromagnetic clutch unit EC to smoothly rotate the magnetic disk 31.

The rotation force blocking means includes a limit switch 40 provided on the upper surface of the housing 30 to cut off the DC power applied to the magnetic disk 31 when the rotation shaft and the lockout switch are reset by the electronic clutch unit EC. And a protrusion 41 installed on the upper surface of the disk 37 to be in contact with the limit switch 40 when the disk is rotated, wherein the limit switch is positioned on the rotation path of the protrusion so that the protrusion and the limit when the disk is rotated. Let the switches touch each other.

In addition, the lockout switch driving device according to the present invention, when the lockout switch 1 switched to the reset state by the rotational force generating means, the electromagnetic clutch unit (EC), the rotational force blocking means is switched to the tripping state, the rotary shaft 10 Return means for quickly rotating the back to its original position.

The return means is fixed at one end to the projection 41 on the upper surface of the disk 37 so as to equalize the rotation ratio of the rotation shaft 10 and the drive shaft 2 of the lockout switch 1 to maintain the reset state, and the front of the case It is set as the return spring 50 fixed to the inner wall surface of the cover 30-1.

Here, the use of the return spring 50 occurs when the lock-out switch drive shaft before the lock-out switch drive device according to the present invention is switched to the trip state because the disc 37 is coupled to the rotary shaft 10. Since the larger moment of inertia than the rotational moment of inertia is generated, it is to quickly rotate the rotation axis by offsetting this.

The automatic switching operation of the lockout switch by the lockout switch driving apparatus according to the present invention having such a configuration will be described.

First, when an abnormal state occurs in any one circuit including a plurality of contact parts 3 connected to the lockout switch 1, the lockout switch 1 in the reset state is tripped, and the locked driving shaft ( Unlock 2).

Accordingly, the drive shaft 2 rotates in the reverse direction and reversely rotates the rotation shaft 10 in the same direction.

In this state, when the operator presses a reset button installed at a remote location, a reset signal is generated to operate the driving motor 22 of the rotational force generating means, and the rotational force of the motor is decelerated by the first and second reduction gears 24a and 24b and the worm gear (25) rotates, the worm gear is to rotate the engaged worm wheel (26).

At this time, DC power is applied to the magnetic disk 31 of the electromagnetic clutch unit EC to generate electromagnetic force, and the magnetic disk 31 and the disk 37 are bonded to each other by the electromagnetic force.

Therefore, when the worm wheel 26 rotates, the magnetic disk 31 and the disk 37 rotate in conjunction with each other, and the rotation shaft 10 rotates in the same direction as the rotation direction of the worm wheel 26.

As such, when the rotation shaft 10 rotates, the driving shaft 2 of the lockout switch 1 rotates simultaneously to the locking position of the driving shaft which is reset, and when the driving shaft 2 is locked, the rotation shaft 10 is also locked. It is reset.

Further, the rotation shaft 10 and the drive shaft 2 are rotated at the same time so that the lockout switch 1 is switched to the reset state, and at the same time, the projection 41 provided on the surface of the disk 37 is the limit switch 40 of the rotation force blocking means. When the projection 41 and the limit switch 40 are in contact with each other, the DC power applied to the magnetic disk 31 is cut off.

Therefore, even when the worm wheel 26 is rotated by the driving motor 22, the magnetic disk 31 and the disk 37 are separated, and the rotation of the disk 37 is stopped, and the rotating shaft 10 does not rotate. It will remain intact.

In this way, while the rotation shaft 10 remains locked, the return spring 50 is in a tensioned state as shown in FIG. 11.

That is, one end of the return spring 50 is fixed to the protrusion 41 formed on the upper surface of the disk 37, and the other end of the return spring 50 is fixed to the inner wall surface of the front cover 30-1 of the case. Because it becomes.

In this way, while the rotating shaft 10 is locked so that the drive shaft 2 of the lockout switch 1 maintains the reset state, any one of the plurality of contact portions 3 connected to the lockout switch 1 When an abnormal condition occurs, the drive shaft 2 of the lockout switch 1 is unlocked to enter the trip state.

Therefore, the drive shaft 2 is rotated in the opposite direction of the reset state to a trip state, and in conjunction with the rotary shaft 10 also rotates in the opposite direction to a trip state.

At this time, the disk 37 is quickly returned by the elastic restoring force of the tensioned return spring 50 to return the rotary shaft 10 quickly.

Therefore, the lockout switch driving apparatus according to the present invention automatically switches the lockout switch in the trip state to the reset state.

In addition, in the lockout switch driving device according to the present invention, not only the lockout switch 1 in the tripped state is automatically switched to the reset state by the driving motor 22 but also manual operation is possible.

That is, when the rotary knob 4 is rotated without operating the drive motor 22 by operating the reset button from the outside, the rotary shaft 10 rotates in conjunction with the drive shaft of the lockout switch 1 simultaneously with the rotation of the rotary shaft. (2) is rotated and locked, and it is switched to a reset state.

At this time, the disk 37 is also rotated at the same time as the rotation shaft 10 is rotated to the state to tension the return spring 50, the rotation shaft 10 and the disk 37 is quickly returned when switching trip.

Fig. 12 is a drive control circuit diagram of the lockout switch driving apparatus according to the present invention. [0029] The drive circuit of the present invention controls a drive motor 22 for rotating the drive shaft of the lockout switch and the transmission of the drive motor rotational force to the drive shaft. The electric coil EC of the electromagnetic clutch unit is controlled. The driving circuit operates when the driving shaft rotates to reach a predetermined position and the switching unit 200 applies power to the electric coil EC and the driving motor 22 according to a reset signal for resetting the lockout switch. A limit switch 40 and a switching unit off means for turning off the switching unit when the limit switch is operated or a trip signal is input after a reset signal is applied. When the reset switch is turned on, the reset signal is switched to the switching unit 200. Turn on to operate the electric coil of the drive motor and the electronic clutch unit to rotate the drive shaft.When the cam switch is reset according to the rotation of the drive shaft, the limit switch is operated to turn off the switching unit to cut off the power supply to the motor and the electric coil. The reset operation is completed. The switching-off means has a tripping priority with a circuit which cuts off the switching unit when the limit switch 40 operates. Have a circuit The trip priority operation circuit transmits a signal through the diode D5 and the resistor R2 to turn on the transistor Q1 when the trip switch TRIP operates or the OCR (overcurrent relay) operates, thereby turning on the transistor Q2. ) Is off. That is, the switching unit is turned off. In this circuit, a trip state maintaining unit 500 is provided. When a trip signal is applied, the trip coil L1 of the lockout switch is excited and its a contact connected in series with the trip coil is turned on once. When it is tripped, it keeps tripping until the cause of the trip is removed. The trip state maintaining unit 500 turns on the trip switch contact (TRIP) by manually operating the trip switch, or when the OCR is operated, excites the trip coil (L1) of the lockout switch and serially connects the trip coil (L1). If the contact a (L1a) is turned on and trips once, it keeps tripping until the cause of tripping is eliminated.In addition, in this circuit, when the lockout switch is not completely switched to the reset state The delay unit 300 drives the electronic clutch unit EC and the driving motor 22 only for a predetermined time, and while the delay unit 300 remains on, the reset contact signal except for the trip signal is continuously or There is a photo coupler unit 400 which is stably operated in a self-holding state even though it is instantaneously drawn in. The electronic clutch unit EC and the driving motor 22 are divided in series by being connected in direct current voltage state. So pressure is supplied, and by flowing a current of the same size and to be stably with each other.

The reset state maintaining unit 100 connects the reset contact RESET of the reset switch, the a contact Ya of the relay Y, the relay Y, and the first resistor R1 in series, and between the relay Y both ends. The first Zener diode Z1 is connected in parallel, and the b contact Yb of the relay Y is connected to the connection point of one end of the reset contact RESET and one end of the a contact Ya.

Switching unit 200 is a collector is connected to the (+) DC power supply terminal, the first capacitor (C1) is connected between the base and the emitter, the emitter is via the first diode (D1) of the electronic clutch (EC) It is composed of a power switching transistor (Q2) connected to one side.

The delay unit 300 includes a second capacitor C2 and an eighth resistor R8 connected in parallel.

The photocoupler unit 400 is coupled to the light emitting device PT1 and the light receiving device PT2 that are optically coupled to the base side of the switching transistor Q2, and is switched to be opposite to the transistor Q2. It is configured to include.

Reference numerals R2 to R7, R9 are resistors, R10 is a current regulating resistor of the motor 22, D2 to D5 are diodes, Z2 is a second zener diode for stabilizing the operation of the light emitting device PT1, and OCR is an external trip A contact that represents an element.

The operation of the drive control circuit of the lockout switch driving apparatus according to the present invention configured as described above will be described with reference to Fig. 12. As shown in FIG. 12, a DC supply power supply (for example, DC125V) is applied, and the limit switch 40 is tripped. If the user turns on the reset switch (which can be installed at the remote place) in the state connected with (T), the reset contact point (RESET) thereof is turned on, and at this time, the relay (Y) in which the zener diode (Z1) is connected in parallel is stopped. Since the contact a, Ya, which is a normally open contact of the relay Y, is in an off state, but the contact b which is normally closed, Yb is in an on state, the switching transistor Q2 is provided through the contact b and the resistor R5. The bias voltage is applied to the base of the power switch) to turn on the power switching transistor Q2 of the switching unit. Accordingly, DC power is applied to the electronic clutch unit EC and the driving motor 22 through the reverse current prevention diode D1 connected in series to the emitter side of the power transistor Q2 of the switching unit, thereby providing the electronic clutch unit EC and the driving motor. (22) is driven, so that the driving force is generated and the drive shaft is rotated so that the transistor Q2 is turned on to supply the driving force until the lockout switch is reset, and the limit switch 40 is operated to stop when the power supply is stopped. The reset operation is completed. With the switching transistor Q2 turned on, the capacitor C1 connected to the base of the switching transistor Q2 is charged, and at the same time, the light emitting device of the photocoupler is connected through the resistors R6 and R7. Capacitor C2 is charged while allowing PT1 to turn on. In this case, the light emitting device PT1 is kept on (for about 3 seconds) until the capacitor C2 is completely charged.

In addition, since the light emitting device PT1 is turned on, the light receiving device PT2 coupled thereto is turned on, and the driving relay Y is operated through the diode D2, so that the normally open contact a, Ya, is turned on. At the same time, the contact point Yb is turned off. At this time, the relay Y receives the light while the light emitting device PT1 is on even if the remote operation RESET contact point via the contact point a is turned on after turning on once. Since the relay Y is continuously operated through the device PT2 and the diode D2, it becomes a self-holding state, and its contact b is turned off, so even if the user turns the reset switch on again, The contacts Ya and Yb of the relay Y that are in the self-holding state remain unchanged. The self-holding state of the relay Y is remotely connected to its auxiliary contacts Ya1 and Yb1 circuit (not shown), in addition to simply maintaining a stable reset driving state while the user remotely resets the lockout switch in the trip state. It is used as operation status monitoring indicator and other control contacts. However, when the instantaneous trip signal is applied in such a state, since the driving relay Y is in the self-holding state, the external trip element contact OCR is maintained even when the electronic clutch unit EC and the driving motor 22 are continuously driven. And turns on the transistor Q1 through the diode D5 and the resistor R2 connected to one side of the passive trip contact TRIP, and turns off the power transistor Q2 which is operated oppositely to the electronic clutch unit EC. And stop driving of the driving motor 22. In other words, even when the reset switch is turned on and operated in the reset self-holding state, when the trip signal is instantaneously input, the trip function is operated to be prioritized prior to the reset function. Here, the capacitor C1 is connected in parallel with the resistor. A function of stabilizing the reset operation by making the driving time a little longer after the switching operation of the limit switch 40 is performed with the time constant (about 0.5 seconds) discharged for a predetermined time through R6. Capacitor C2 takes the voltages distributed from resistors R7 and R9, and delays the main switch, which consists of a parallel connection between Zener diode Z2, light emitting element PT1, and resistor R8. As the unit 300, while the charging state of the capacitor C2 is maintained during the RC time constant (about 3 seconds) and becomes fully charged, the light switching element PT1 and the light receiving element PT2 are turned off and the power switching transistor is turned on. (Q2) The motor 22 and the electronic clutch unit EC are driven for only a predetermined time (about 3 seconds) as described above, and the continuous operation is interrupted to prevent burnout of the driving motor 22 due to idling. .

When the driving motor 22 stops driving in this way, the limit switch 40 is remotely connected from the trip terminal T to the reset terminal R to be in a reset state.

In this case, the DC power supply 125V is applied to the base bias voltage of the transistor Q1 through the diode D3 and the resistor R3 so that the transistor Q1 is turned on, and thus the switching transistor Q2 is turned off. The electromagnetic clutch unit EC and the driving motor 22 connected in series with the emitter side are kept in a state where the driving is stopped.

The reason why the electronic clutch unit EC and the driving motor 22 are connected in series is to stably operate the DC voltage applied to each other at low voltage. For example, when the electronic clutch unit EC is operated, The DC voltage between both ends is about 24V and the DC voltage between both ends of the drive motor 22 is designed to be about 76V.

As described above, the present invention can automatically switch from the tripped state of the lockout switch to the reset state by the operation of the limit switch 40, so that the driving convenience can be achieved.

If the user manually turns on (resets) the lockout switch (not shown) when operating manually instead of automatic, as shown in FIG. 12, the trip coil L1 of the lockout switch and the like. Since the contact a1 L1a connected in series is always turned on, the device is tripped by the contacts aPTRIP of the trip switch.

Here, the plurality of contacts OCR connected in parallel to a contact TRIP of the trip switch indicate external trip elements.

As described above, the lockout switch driving and driving control circuit according to the present invention automatically switches the lockout switch in the reset state to the reset state or the lockout switch in the trip state to the reset state so that the operator locks the lockout switch. There is no need to force the out switch, and the remote control of the lockout switch can be easily controlled even from a long distance.

In addition, the switching operation of the lockout switch can be centralized and controlled to facilitate maintenance of the lockout switch.

Claims (12)

A lockout switch driving device for driving a drive shaft of a lockout switch having a drive shaft for turning on or off a plurality of contacts, A rotation shaft coupled to one side end of the driving shaft to rotate together; Rotating force generating means for rotating the rotating shaft; An electromagnetic clutch unit for coupling the rotary shaft and the rotary force generating means to transmit or block the rotary force of the rotary force generating means to the rotary shaft; Rotation force blocking means for stopping the coupling of the electronic clutch unit when the rotating shaft rotates by a predetermined angle; And a drive control circuit for controlling said rotation force generating means, said electromagnetic clutch unit, and rotation force blocking means. The method according to claim 1, wherein the rotational force generating means, Drive motor, A worm gear coupled to the drive shaft of the drive motor; Lock out switch drive device characterized in that it comprises a worm wheel is engaged with the worm gear to rotate. The method of claim 2, wherein the electromagnetic clutch unit, A magnetic disk having a first surface fixed to the worm wheel of the rotational force generating means and interlocked with the worm wheel; A magnetic coil installed on a second surface of the magnetic disk to generate magnetic force by an electrical signal; And a disk fixed to the rotating shaft and attracted when magnetic force is generated in the magnetic disk and attached to the magnetic disk. The method of claim 3, wherein the rotational force blocking means A projection provided on a disk upper surface of the electromagnetic clutch unit; And a limit switch installed on an upper surface of the housing of the electromagnetic clutch unit, the limit switch being operated when contacted with the protrusion in accordance with the rotation of the disk. The method according to claim 4, And a return spring having one end fixed to the disk and the other end fixed to an inner wall surface of the clutch case of the electronic clutch unit. The method according to claim 1, The knob shaft of the rotary knob is coupled to the other end of the rotary shaft to lock the switch out of the reset state in accordance with the rotation of the rotary knob to manually reset the drive device. A drive control circuit for controlling a drive motor for rotating the drive shaft of the lockout switch and an electric coil of the electromagnetic clutch unit for controlling the transmission of the drive motor rotational force to the drive shaft; A switching unit for applying power to the electric coil and the driving motor according to a reset signal for resetting the lockout switch; Limit switch is operated when the drive shaft is rotated to reach a certain position, And a switch-off means for turning off the switch when the limit switch operates after a reset signal is applied or when a trip signal is received. The method according to claim 7, When the trip signal is applied, the trip coil of the lock-out switch is excited, and the contact point serially connected to the trip coil is on, and once the trip state is in a trip state, the trip state maintenance part further maintains the trip state until the cause of the trip is removed. The drive control circuit of the configured lockout switch drive device. The method according to claim 7, And the electronic coil and the motor are connected in series to a power supply. The method according to claim 7, The switching unit is a switching transistor for supplying a current to the drive motor and the electric coil, The switching off means is a second transistor having a main current path connected to a control electrode of the transistor, And a delay unit configured to maintain the switching transistor in an on state for a predetermined time even when the second transistor is operated. The method according to claim 10, And the delay unit is a parallel circuit of a capacitor and a resistor connected to the control electrode of the switching transistor. The method according to claim 7, When the reset signal is input, the contact a, the relay and the first resistor of the relay are connected in series, and the first zener diode is connected in parallel between both ends of the relay, and the contact b of the relay is connected to one end of the reset contact and one end of the contact a. A holding part connected to maintain a reset signal stable; And a photo coupler portion which functions as a timer so that the driving motor is operated only for a predetermined time after the reset signal is input.