JPH01285580A - Control device for elevator - Google Patents

Abstract

PURPOSE:To perfectly prevent generation of troubles due to overload by repeating opening/closing motion of a door so as to reduce the load on the motor, when the overload condition is generated on the motor for driving the door and a detecting device for overload is actuated. CONSTITUTION:For example when a small stone is in a seal groove and a door is obstructed to close, because of excessive lock current on the motor due to actuation of a contactor for closing door 10a, torque switches Ts1, Ts2 are on, a closing side inversion relay 101R is on and self-held, an opening/closing command relay 100 is off, and opening motion of the door is carried out. And at full opening and an opening end switch OLS off and the relay 101R off, an elevator operating timer T is off, the opening/closing command relay 100 is on again. The above-stated motion is repeated untill the stone is removed. After six times repeating of this motion, an alarm device X is actuated by output from a counter C and it is informed to a control room. Besides, at opening door motion same action is done. Hereby, generation of troubles due to overload can be prevented.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an elevator control device, and more particularly to an elevator control device that controls the opening and closing of doors to protect passengers and prevent overload accidents. .

[Conventional technology]

In order to control door closing to prevent overload accidents and to protect passengers from danger, an actuating piece is installed at the front end of the elevator door, and if an object collides with this actuating piece while the door is closing, the actuating piece will shut off. Conventionally, elevator control devices have been used in which the elevator performs a yielding motion, and this yielding motion activates the control device to stop the closing operation of the door, or reverse the door opening operation. Recently, the door itself has been made to operate as an actuating piece, and if an object collides with the door while it is closing, it detects the force that prevents the door from moving due to this collision, and stops the closing operation or opens the door. A control device for an elevator has also been proposed.

All of the elevator control devices mentioned above detect an object that collides with the door while it is closing, and either stop the closing operation or open the door to protect passengers and the door itself. It is.

However, accidents may occur where a finger or kimono gets caught between the door and the frame while the door is opening, and in such cases, a caretaker or the like may forcibly remove the finger or kimono that has been caught. It was being pulled out. As a result, customers may break their fingers or damage their kimonos.

In order to solve this problem, an overload detection device is installed on the elevator door. When this overload detection device detects an overload during the door opening/closing operation, the door is reversed until the overload is no longer detected. A control device for an elevator that repeats opening and closing operations is disclosed in Japanese Patent Publication No. 55-3271 and Japanese Patent Publication No. 5
This is proposed in Japanese Patent No. 5-3272.

[Problem to be solved by the invention]

In the method proposed above, unless the cause of the overload on the elevator door is removed, the door opens and closes continuously, which increases the load on the door drive motor within a predetermined period of time, resulting in overload. Overload accidents that activate load relays may also occur.

The present invention has been made in view of the existing control devices for elevators of this type as described above, and its purpose is to prevent the door from being opened when an overload condition is detected during the opening/closing operation of the door. and an elevator control device that controls the door drive motor so that it does not temporarily overload when the door closes repeatedly, and also issues an alarm if the door cannot be opened or closed for a predetermined period of time. It is about providing.

[Means to solve the problem]

To achieve the above object, the present invention provides an electric motor that drives elevator doors in the opening and closing directions, and an overload detection device that detects the occurrence of an overload state during door opening or closing operation. and reversing means for reversing the electric motor in the door closing direction when the overload detection device is activated during the door opening operation, and reversing the electric motor in the door opening direction when the overload detection device is activated during the door closing operation; An elevator control device comprising: a predetermined value counting means that operates when a door is opened or closed, and which indicates that the number of times the overload detection device has been operated has reached a predetermined number; and the predetermined value counting means. When the means detects the first predetermined number of times, the extension means extends the door open holding time during the door closing operation and extends the closed door holding time during the door opening operation.

In addition to the above-mentioned configuration, a system that issues an alarm includes an alarm means that issues an alarm when the predetermined value counting means detects a second predetermined number of times that is greater than the first predetermined number of times. .

[Effect]

In the present invention, if, for example, a part of the passenger's body becomes caught between the door and the frame during the opening/closing operation of the door, the overload detection device is activated.
The electric motor for driving the door is rotated so that the reversing means performs the reversing operation. If the overload detection device is not deactivated, the door opens and closes repeatedly.

However, when the predetermined value counting means counts that the number of activations of the overload detection device has reached the first predetermined number, if an overload is detected during door closing operation, the door open holding time is It will be extended. Further, if an overload is detected during the door operation during this time, the door closing time is extended.

Further, in the present invention, in the configuration having an alarm means, when the predetermined value counting means detects a second predetermined number of times that is greater than the first predetermined number of times, the alarm means issues an alarm.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail using circuit diagrams showing the configuration thereof.

As shown in the figure, a contact 10a is connected between DC power terminals P and N.
l, control resistance R+, control resistance Rz, and contact 10bl,
connected to each other in series. Similarly, DC power terminal P
, N, the contact 10bz and the contact 10a are connected in series, and the overload relay 94A and the electric motor M are connected in series, and the electric I
In parallel with 9M, braking resistance Rs, contact 10as and contact 1
A series connection circuit of 0 bs is connected.

In addition, the motor shunt field winding F is connected between the DC power supply terminals P and N.
Similarly, the contact 94B, the contact 100a of the closing door contactor 10a1, and the closed end switch CLS are connected in series, and the contact 102R is connected in parallel to the contact 100a. An opening contactor 10b and a contact 102Rs are provided between the connection point between the contact 94B and the closing door contactor 10a and the DC power supply terminal N.

Contact 100b and open end switch OLS are connected in series with each other.

DC power supply terminal P, contact 100a and closed end switch CLS
between the connection point 102RI and the open side reversing relay 1
02R are connected in series, and a series connection circuit of torque switch TS and contact 10bXl is connected in parallel to this contact 102R.

In addition, between the connection point between the torque switch TS and the contact 10bX, and the connection point between the contact 100b and the open end switch oL, s, a contact 10aX and a closing side reversing relay 101R are provided.
are connected in series with each other, and the direct current is connected to source terminal P and contact 1.
A contact 1101R is connected between the connection point of 0aX and the closing side reversal relay 101R.

Similarly, between DC power terminals P and N, relay 100 for opening/closing command, contact 1a, contact 101RI, contact 10bX!
, contact T3, door open button OB and door safety switch SS
are connected in series with each other, and a contact 10 is connected between the connection point between the open/close command relay 100 and the contact 1a and the DC power terminal N.
The 0C1 contact 101R4 and the contact 1b are connected in series with each other, and the connection point between the contact 101RI and the contact 1obxt,
A contact 10 is connected between the contact T1 and the connection point of the door open button OB.
2R4 and contact CA are connected in series with each other, and contact T
The connection point between I and the door open button OB, and the contact point 101R.

and the contact point 1b are connected to each other.

In addition, a torque switch TS! is installed between DC power supply terminals P and N.
, terminal 1 of counter C. Terminal 2 and relay CA are connected in series, and similarly, contact IC, terminal 2 of counter C, terminal 4 and relay CB are connected in series between DC power supply terminals P and N. Furthermore, a DC power terminal P,
A contact CAt, a contact 101Rs, and an open extension relay 48C are connected in series between the DC power terminal P, a contact 101Rs, and an open extension relay 48C, and a contact 48C3 and a contact 48CT are connected in series between the DC power terminal P and the connection point of the contact 101Rs and the open extension relay 48C. An opening extension timer 48CT is connected in parallel to the opening extension relay 48C.

Then, an open end switch o L is connected between the DC power supply terminals P and N.
, s, contact 48C! and elevator operation timer T are connected in series with each other, and similarly, a contact CB + and an alarm bag reX are connected in series between DC power supply terminals P and N.

Here, the contacts 1a to IC are the contacts of the elevator operation relay, and the contacts 10 a++ 10 at, 10 as, 1
0aX+ is the contact of the closing door contactor 10a, contact 10b +
, 101)t.

10 bs, 101)

~102R4 is the contact point of the open side reversal relay 102R, contact point 9
4B is the contact of overload relay 94A, contact 48C
1,48C! is the contact of open extension relay 48C, contact 48
CT is the contact of the open extension timer 48CT, contact CA +
, CA! is a contact of relay CA, contact CB is a contact of relay CB, and T is a contact of elevator operation timer T.

In an embodiment with such a configuration, the closed door contactor 10a1
Door opening contactor 10b,) Luxwitch TS.

and torque switch TS constitute the main part of the overload detection device, and the closing side reversing relay 101R and the opening side reversing relay 1
02R constitutes a reversing means, a counter C constitutes a predetermined value counting means, an open extension relay 48C and an open extension timer 48C.
T constitutes the main part of the extension means.

Next, the operation of the embodiment will be explained.

First, a case will be described in which, for example, a pebble exists in the sill groove and the closing operation of the door is blocked during the closing operation of the door.

In this case, the door closing contactor 10a is activated, an excessive lock current flows through the stopped motor, and the motor drive torque increases, so the torque switch TS.

TS is turned ON. When the torque switch TS is turned on, 10aX+ is turned on at this time, and the open end switch OL is turned on.
Since S is ON, DC power terminal P,) Lux switch TS+, contact 10aX, and closing side reversing relay 101
A closed circuit is formed by R, open-end switch OLS, and DC power supply terminal N, and the closed-side reversing relay 101R is energized and contact 1
01R1 is turned ON and self-maintained.

When the closing side reversing relay 101R is energized in this way, the contact 101RI is turned OFF and the contact 101R4 is turned OFF, so the opening/closing command relay 100 is deenergized and the door performs the opening operation. Then, when the door is fully opened and the open end switch OLS is turned OFF and the closing side reversing relay 101R is deenergized, the elevator operation timer T is turned OFF and the contact T1 is turned ON. 100, contact 1a + contact 101R1, contact 10bX
! .

Contact point T1. A closed circuit is formed by the door open button OB, the door safety switch SS, and the DC power supply terminal N, and the opening/closing command relay 100 is turned ON again to start the door closing operation.

If there are still pebbles in the sill groove, the door closing contactor 10a is activated as described above during the door closing operation, the torque switches TS, TS, are turned on, and the door opening operation is reversed and the door opening/closing operation is performed in the same way. Repeated. When the opening/closing operation of the door is repeated three times on the same floor and the torque switch T S t is turned on three times, the logic value of the signal at terminal 3 of counter C becomes "l" and the relay CA is energized and contact CA is turned ON. At this time, the closing side reversing relay l0IR is energized, so the contact 101Rs is turned on, and the DC power terminal P and the contact CA! , contact 101R1,
A closed circuit is formed by the open extension relay 48C and the DC power supply terminal N, and the open extension relay 48C is energized.

At the same time, the open extension timer 48CT turns ON, and the contact 48C
8 is turned ON, and the open extension relay 48C is self-held. And contact 48C! By turning off, the elevator operation timer T turns off.

In this state, when the open extension command timer 48CT completes counting in 3 minutes, the contact 48CT is turned OFF, the self-holding of the open extension relay 48C is released, and the open extension relay 48C is deenergized. As the opening extension relay 48C is deenergized, the contact 48C2 is turned ON and the operation command timer T starts counting. When the operation command timer T completes counting in 3 to 5 seconds, the contact T1 is turned on, the opening/closing command relay 100 is energized, and the closing operation of the door is started.

If pebbles still exist in the sill groove, the opening and closing operations of the door are repeated as described above, but when this number of operations is repeated six times on the same floor and the torque switch TSt is turned on six times, terminal 4 of counter C The logical value of the signal becomes "1", and relay CT3 is activated. Contact CB is activated by this relay CB.

is turned on, alarm device X is activated and an alarm signal is issued in the control room.

Next, we will explain the case where the opening operation of the door is blocked due to the presence of pebbles in the sill groove or the customer's finger being caught between the door and the frame. .

In this case, the door opening contactor 10b is activated, an excessive locking current flows through the stopped motor, and the motor drive torque increases, so the torque switch TS.

T S t turns ON. For this reason, the DC power terminal P,
Torque switch TSI, contact 10bX! , a closed circuit is formed by the open-side reversing relay 102R, the closed-end switch CLS, and the DC power supply terminal N, and the open-side reversing relay 102R is energized.
Contact 102Rs turns ON and the open side reversal relay 102R
is self-maintained.

When the open side reversing relay 102R is energized in this way, the contact 102Rt is turned ON and the contact 102R3 is turned OFF, so the opening door contactor Job is turned OFF, the closing door contactor 10a is turned ON, and the door is moved in the closing direction. The robot flips over and moves, allowing the customer to remove the finger that was caught. When the door is completely closed, the closing switch CLS turns OFF.
Then, the opening side reversing relay 102R is deenergized and the door starts opening operation again.

Then, when the door opening contactor 10b is activated due to pebbles or the like existing in the sill groove during the door opening process, the door opening/closing operation described above is repeated. This kind of door opening/closing operation is repeated three times on the same floor, and the torque switch T
When S is turned on three times, the logic value of the signal at terminal 3 of counter C becomes 1'', and relay CA is energized, thereby energizing open extension relay 48C as already described.

In this case, as already mentioned, the open extension command timer 48C
When the counting of T is completed, the operation command timer T starts counting, and when the counting is completed, the closing operation of the door is started, and at the same time, the opening/closing command relay 100 is self-held by the contact 100C, and the door starts to open again. is prevented.

In this case, when the door open button OB is operated with the door closed, the opening/closing command relay 100 is deenergized and the door starts to open again. Here too, the torque switch TSt is turned ON 6 times.
When this occurs, the alarm device is activated by energizing relay CB.

According to the embodiment, when the door is locked and the overload detection device is activated, the opening extension command timer 48CT
This can temporarily reduce the burden on the motor caused by the repeated opening and closing operations of the door, thereby preventing the occurrence of overload accidents such as activation of overload relays. If the operation of the overload detection device is not released and the inoperable state continues, an alarm will be activated in the control room and an accident will be reported. If the cause of the overload is removed, the above-mentioned notification will not be made and the elevator will operate efficiently.

[Effects of the Invention] As explained in detail above, in the present invention, when an overload state occurs in the electric motor for driving the door and the overload detection device is activated, the load on the electric motor due to the repeated opening and closing operations of the door is reduced. Therefore, it is possible to completely prevent the occurrence of an overload accident that would lead to activation of the overload relay. In addition, if the overload detection device does not deactivate even if the door is repeatedly opened and closed a predetermined number of times, the control room will be notified of the occurrence of an accident. To efficiently operate an elevator without stopping the elevator.

[Brief explanation of the drawing]

The figure is a circuit diagram showing the configuration of an embodiment of the present invention. M-----1 electric motor, 10 a----- Single closing door contactor, tob---Opening door contactor, CLS------
- Closed end switch, OLS... - Open end switch,
TS+, TSt・-・・・・torque switch, l
0IR・・・・・・Closing side reversal relay, 102R-・・・
Open side reversal relay, 100...--Relay for opening/closing command, C-----Counter, 48 C---Open extension relay, 48CT---Timer for opening extension, T.
-・-Elevator operation timer, X-・-...-alarm device. M......? Dynamic slide 10a...open, Ji poem touch sake 10b...Mri sin thin corner Doon CLS...Seki 13ft 24tsuf OLS-°・°°open familiar switch TSL, TS27' L/Kusuit〒101R・
・・・・Open IH & pressure relay 102R・・・・・・Open IH 1-Year relay 100R・・・・・・MM pedal command relay-C・・・・・・・・・Counter 48C・...Opening extension tree 48CT...Opening 1X length timer T...Elevator 9X early shifter 47X...
・・・・・・Blade information technique

Claims (2)

[Claims] (1) An electric motor that drives the elevator door in the opening and closing directions, an overload detection device that detects the occurrence of an overload state during door opening or closing, and An elevator control device comprising: a reversing means for reversing the electric motor in the door closing direction when the overload detection device is activated, and reversing the electric motor in the door opening direction when the overload detection device is activated during the door closing operation. , a predetermined value counting means that is activated when the door is opened or closed, and detects that the number of times the overload detection device has been activated has reached a predetermined same number;
When the predetermined value counting means detects the first predetermined number of times, it is characterized by having an extension means for extending the door open holding time during the door closing operation and extending the closed door holding time during the door opening operation. Elevator control device. (2) An electric motor that drives the elevator door in the opening and closing directions, an overload detection device that detects the occurrence of an overload state during the door opening or closing operation, and an overload detection device that detects the occurrence of an overload state during the door opening or closing operation; An elevator control device comprising: a reversing means for reversing the electric motor in the door closing direction when the overload detection device is activated, and reversing the electric motor in the door opening direction when the overload detection device is activated during the door closing operation. , a predetermined value counting means that is activated when the door is opened or closed, and detects that the number of times the overload detection device has been activated has reached a predetermined number;
When the predetermined value counting means detects the first predetermined number of times, the predetermined value counting means includes an extension means for extending the door open holding time during the door closing operation and extending the closed door holding time during the door opening operation, and the predetermined value counting means. An elevator control device comprising: an alarm means for issuing an alarm when a second predetermined number of times is detected that is greater than the first predetermined number of times.