JPH08127479A - Control device for elevator - Google Patents

Abstract

PURPOSE: To ensure safety for a worker against an artificial operation miss for a safety confirming switch group under a work in a pit by a method wherein when a cage is not stopped at a lowermost floor, it is detected that a landing door at the lowermost floor is opened, a control device for an elevator is operated and a power source is disconnected by means of an output therefrom regardless of the state of each safety switch. CONSTITUTION: During inspection operation, an inspection operation change-over switch 5A is opened and an AND gate circuit 15 is set to a low level 'L' regardless of inputs from a lowermost landing door closing detecting switch 3AA' and a lowermost cage position detecting switch 14. Since the set terminal S and the reset terminal RE of a flip flop circuit 17A are both at the low level 'L', a relay 18 holds a state of non-excitation (OFF). Since the normally closing contact of the relay 18 inserted between a safety switch group and a safety confirmation relay is closed, the contact of a safety confirmation relay is in a closed state, and inspection operation of an elevator is executed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to control of an elevator for preventing malfunction of a car due to human error during installation or maintenance work in a pit formed at the bottom of an elevator hoistway. Regarding the device.

[0002]

2. Description of the Related Art In a pit formed at the bottom of an elevator hoistway, devices such as a car, a suspension weight buffer, a guide rail platform, a terminal floor deceleration switch, a final limit switch, and a governor rope tension vehicle are installed. Is installed.

By the way, when carrying out the installation work and maintenance / inspection work of these devices in the pit, it is very dangerous to be caught between the elevator car and the pit floor. In addition to being provided, an operator ensures safety by working based on an operation procedure or the like for surely avoiding a danger by using these devices.

Conventionally, a control circuit having a configuration as shown in FIG. 11 has been adopted as an elevator control device provided with such a safety device. In FIG. 11, E is a DC power source, and the safety switch group 1 and the safety confirmation relay 2 are connected in series between the positive side and the negative side of the DC power source E. The safety switch group 1 is composed of a safety switch 1A in the car provided on the operation panel of the car, a pit safety switch 1B provided in the pit, and a safety switch (not shown) other than these. These safety switches are connected in series. It is connected.

A safety confirmation relay contact 2a which is closed when the safety confirmation relay 2 is excited on the positive side of the DC power source E.
The control power supply bus P is connected via the control power supply bus P, and the control power supply bus N is connected to the negative side of the DC power supply E.

The movable side contact of the inspection operation changeover switch 5 is connected to the positive side control power source bus P through the hall door closing detection switch group 3 and the car door closing detection switch 4 in series. The hall door closing detection switch group 3 is a series of the lowest floor hall closing detection switch 3A, the lowest floor + the first floor hall closing detection switch 3B, ..., the top floor hall closing detection switch 3X. , The hall door close detection switch 3A on each floor,
3B, ..., 3X are closed when the door is closed and open when the door is open. Also, the car door close detection switch 4
Is configured in the same way as the landing door close detection switch, and closes when the door is closed and opens when the door is open.

One fixed contact of the inspection operation changeover switch 5 is a minus side via a series circuit of a direction detection relay contact 6a, a terminal floor direction limit switch 8, a descending operation relay contact 11b and an ascending operation relay 10. A series circuit of a direction detection relay contact 7a, a terminal floor direction limiting switch 9, an ascending operation relay contact 10b, and a descending operation relay 11 is connected in parallel to the control power bus N.

Although the details of the direction detection relay are not shown, the direction detection relay detects the operating direction of the elevator car based on information from a call registration button provided in a hall or a car. Closes when it detects a call in the down direction.

Further, the endless floor direction limiting switches 8 and 9 are switches provided on the endless floors, that is, the bottom floor and the top floor, and the endless floor direction limiting switch 8 is opened when the car is on the bottom floor. , The car is closed when there is a car other than the lowest floor, the endless floor direction limiting switch 9 is open when the car is on the top floor, and closed when there is a car other than the top floor. To do.

One end of a series circuit of push button switches 13A and 13B of the inspection remote control switch 13 is connected to the other fixed contact of the inspection operation changeover switch 5, and the other end of the series circuit is a direction detection relay contact 6a. It is connected between the terminal floor direction limit switch 8 and the push button switch 1
One end of the push button switch 13C is connected between 3A and 13B, and the other end is connected between the direction detection relay contact 7a and the terminal floor direction limit switch 9.

Further, a parallel circuit of the contacts 10a and 11a of the ascending operation relay 10 and the descending operation relay 11 and the brake coil 12 are connected in series between the positive side control power source bus P and the negative side control power source bus N. .

Next, the operation of the elevator control device configured as described above will be described with reference to the work procedure manual shown in FIG. First, in the work procedure S1, the car is moved from the bottom floor to 1
Stop upstairs and above. Next, in the work procedure S2, when the in-car safety switch 1A is opened, the safety confirmation relay 2 is demagnetized by turning off the power, and its contact 2
a opens.

Therefore, the control power supply buses P and N are not energized, so that neither the ascending operation relay 10 nor the descending operation relay 11 is excited. Similarly, since the brake coil 12 is not energized, the brake is mechanically activated and the electric motor is not activated.

Assuming that the in-car safety switch 1A is not operated in the work procedure S3, the safety confirmation relay 2 is energized, and therefore its contact 2a is closed. In this state, in the work procedure S4, the lowermost floor door close detection switch 3A is opened, so that power supply to the following is cut off.

Therefore, even if the direction detection relay contacts 6a and 7a are closed by the call detection, the ascending and descending operation relays 10 and 11 are not excited. Here, by opening the pit safety switch 1B in the work procedure S6, the electric motor does not start as in the case of operating the in-car safety switch 1A.

[0016]

As described above, in the conventional elevator control device, the safety of the worker is ensured by the safety device and the work procedure manual. However, when the worker works for some reason without depending on the work procedure manual, the in-car safety switch 1A and the pit safety switch 1
This does not apply when B is not operated at all. In other words, the safety of human error is not secured.

The present invention has been made to solve the above-mentioned problems, and the safety of the operator is ensured even if there is a human error in the safety confirmation switch group when performing work in the pit. It is an object of the present invention to provide an elevator control device that can secure the vehicle.

[0018]

In order to achieve the above object, the present invention constitutes an elevator control device by the following means. The invention corresponding to claim 1 is a driving direction detecting means for detecting the driving direction by a call signal from the hall or the car, provided that the car and all doors of the entrances and exits of each floor are closed, and the driving direction detection means. Braking means for releasing the braking of the drive source that drives the car by exciting the car only when the driving direction of the car is detected by means, a safety switch inside the car provided on the operation panel in the car, provided in the pit There is a safety switch group that includes a pit safety switch that is operated from the hall side by opening the door with a key provided that the car is not stopped at the door of the entrance and exit of the hall, and these safety switches inside the car or In a control device for an elevator equipped with a safety device that shuts off the power when the pit safety switch is opened, when the car is not stopped on the bottom floor, the door on the bottom floor opens. When the power is detected, the power supply is cut off by its output regardless of the state of each safety switch of the safety device, and the operation is restored when the release operation is performed, the lowest floor door opening detecting means is provided. .

The invention according to claim 2 is a driving direction detecting means for detecting a driving direction by starting with a call signal from the hall or the car, provided that the car and all doors of each floor hall are closed. And a braking means for releasing the braking of the drive source that drives the car by exciting the car only when the driving direction of the car is detected by the driving direction detection means, and the safety inside the car provided on the operation panel in the car The switch has a safety switch group that is installed in the pit and includes a pit safety switch that is operated from the hall side by opening the door with a key provided that the car is not stopped at the doorway position of the hall, and In an elevator control device equipped with a safety device that shuts off the power source when the in-car safety switch or the pit safety switch is opened, it is the highest when the car is not stopped on the lowest floor. Provided is the lowest-floor door-opening detection unit that operates when detecting that the door of the floor of the floor is opened and suppresses the start of the driving direction detection device by its output, and that the suppression is released when the door is released. It is a thing.

The invention corresponding to claim 3 is a driving direction detecting means for detecting the driving direction by a call signal from the hall or the car, provided that the car and all doors at the entrances and exits of each floor are closed. Braking means for releasing the braking of the drive source that is driven by the power source to drive the car only when the driving direction of the car is detected by the driving direction detecting means, and the in-car safety switch and pit provided on the operation panel in the car There is a group of safety switches, including a pit safety switch that is operated from the hall side by opening the door with a key provided that the car is not stopped at the doorway position of the entrance and exit of the hall, and inside these cars In a control device for an elevator equipped with a safety device that shuts off the power when the safety switch or pit safety switch is opened, when the car is not stopped at the lowest floor Detects that the door has been opened, and operates when the operation confirmation signal of each safety switch of the safety device is not input, shuts off the power supply by its output, and restores its operation when released. The lowermost floor door opening detecting means is provided.

The invention according to claim 4 is a driving direction detecting means for detecting a driving direction by starting with a call signal from the hall or the car on condition that all doors of the car and all the entrances and exits of each floor are closed. And a braking means for releasing the braking of the drive source that drives the car by exciting the car only when the driving direction of the car is detected by the driving direction detection means, and the safety inside the car provided on the operation panel in the car The switch has a safety switch group that is installed in the pit and includes a pit safety switch that is operated from the hall side by opening the door with a key provided that the car is not stopped at the doorway position of the hall, and In an elevator control device equipped with a safety device that shuts off the power source when the in-car safety switch or the pit safety switch is opened, it is the highest when the car is not stopped on the lowest floor. It detects that the door of the hall on the floor has opened, and operates when the operation confirmation signal of each safety switch of the safety device is input, and the output thereof suppresses the start of the driving direction detection device, and the release operation. Then, the lowest floor door opening detection means for releasing the suppression is provided.

The invention according to claim 5 is a driving direction detecting means for detecting the driving direction by starting with a call signal from the hall or the car, provided that the car and all doors of the entrances and exits of each floor are closed. And a braking means for releasing the braking of the drive source that drives the car by exciting the car only when the driving direction of the car is detected by the driving direction detection means, and the safety inside the car provided on the operation panel in the car The switch has a safety switch group that is installed in the pit and includes a pit safety switch that is operated from the hall side by opening the door with a key provided that the car is not stopped at the doorway position of the hall, and In an elevator control device equipped with a safety device that shuts off the power source when the in-car safety switch or the pit safety switch is opened, it is the highest when the car is not stopped on the lowest floor. Monitoring means for monitoring the operation of the pit safety switch on condition that the door of the hall on the floor is open, and sending an output signal only when there is no change in the operating state, and the driving direction by the output signal of this monitoring means A means for suppressing the activation of the detection means and a release means for releasing the output of the activation suppression means provided that the door of the hall on the lowest floor is closed are provided.

According to a sixth aspect of the present invention, in the elevator control apparatus according to the fifth aspect of the present invention, there is provided an alarm generating means for issuing an alarm by an output signal of the monitoring means.

[0024]

In the elevator control device of the invention according to claim 1 or 2, it operates when it is detected that the door of the hall on the bottom floor is open when the car is not stopped on the bottom floor. Then, by shutting off the power supply by the output or suppressing the activation of the driving direction detection means, the braking of the drive source for driving the car cannot be released regardless of the state of each safety switch of the safety device, so the pit It is possible to prevent the car from moving due to human error during in-house installation work and maintenance inspection work.

In the elevator controller of the invention according to claim 3 or 4, it is detected that the door of the hall on the bottom floor is opened when the car is not stopped on the bottom floor,
When a confirmation signal that the operating state of each safety switch of the safety device has not changed is input, the power is cut off by its output or the activation of the driving direction detection means is suppressed, so that the pit It is possible to prevent the car from moving due to human error during in-house installation work and maintenance inspection work, and it can be made to be easy to use and have excellent operability.

According to the elevator control device of the invention according to claim 5, the door of the hall on the bottom floor is open when the car is not on the bottom floor and there is no car on the bottom floor. Since the operation is suppressed when the operation of the pit safety switch is not confirmed by the monitoring means, it is possible to ensure the safety of the worker.

In the elevator control device of the invention according to claim 6, since an alarm is issued in addition to the above-mentioned action, it is possible to inform that the pit safety switch is not operated.

[0028]

Embodiments of the present invention will be described below with reference to the drawings. 1st shows the detection circuit which detects the door opening / closing state of the lowest floor hall in the 1st Example of the elevator control apparatus by this invention.

In FIG. 1, 5A is an inspection operation changeover switch which is closed when not in inspection operation, 3AA is a lowest floor hall door closing detection switch which is closed when a door at the lowest floor is open, and 14 is the lowest This is the lowest car position detection switch that opens when there is a car on the floor and closes when there is no car.

One end of each of these switches 5A, 3AA, 14 is connected to the plus side control power supply bus P1 and the other end thereof is connected to the input end of the AND gate circuit 15, respectively. The output terminal of the AND gate circuit 15 is connected to the set terminal S of the flip-flop circuit 17A,
The output terminal Q of the flip-flop circuit 17A is connected to the minus side control power source bus N1 through the relay 18.

Further, one end of the reset button 16 is connected to the plus side control power source bus P1 and the other end is connected to the reset terminal RE of the flip-flop circuit 17A. Figure 2
Shows the control circuit of the first embodiment, the same parts as those in FIG. 5 are designated by the same reference numerals, and the description thereof will be omitted. Here, only different points will be described.

In the control circuit shown in FIG. 2, the normally closed contact 18b1 of the relay 18 shown in FIG. 1 is inserted between the safety switch group 1 and the safety confirmation relay 2 to form a series circuit. is there.

Next, the operation of the elevator controller constructed as described above will be described. First, in FIG. 1, since the inspection operation changeover switch 5A is circuited during the inspection operation, the AND gate circuit 15 determines whether the input is made by the other lowest floor landing door close detection switch 3AA and the lowest floor car position detection switch 14. It is a low level "L" regardless of.

Therefore, since both the set terminal S and the reset terminal RE of the flip-flop circuit 17A are at the low level "L", the output terminal Q (Q =
Qn + 1) is Qn, that is, low level "L" in the previous state
Therefore, the relay 18 maintains the non-excitation (off) state.

As a result, in the control circuit shown in FIG. 2, the normally closed contact 18b of the relay 18 inserted between the safety switch group 1 and the safety confirmation relay 2 is closed, so that the safety confirmation relay 2 The contact 2a of is in the closed state, and the inspection operation of the elevator can be performed.

Next, the case where the inspection operation is not performed will be described. When not in the inspection operation, the inspection operation changeover switch 5A is closed. When the car is not on the bottom floor, the bottom car position detection switch 14 is closed.
At this time, when the lowest floor hall door is opened, the lowest floor hall close detection switch 3AA is closed.

Therefore, since the AND condition of the AND gate circuit 15 is satisfied, its output changes to the high level "H". When the output of the AND gate circuit 15 becomes "H", the set terminal S of the flip-flop circuit 17A becomes high level "H" and the reset terminal RE is low level "L", so that the output terminal Q of the flip-flop circuit 17A becomes It changes to a high level "H" and the relay 18 is excited (turned on).

As a result, the normally closed contact 18b of the relay 18 inserted between the safety switch group 1 and the safety confirmation relay 2 in the control circuit shown in FIG. Regardless of the operation of the inner safety switch 1A and the pit safety switch 1B, the safety confirmation relay 2 is demagnetized (OFF) to open its contact 2a, and the power supply to the control power bus P, N is cut off.

Therefore, neither the ascending operation relay 10 nor the descending operation relay 11 is excited. Similarly, since the brake coil 12 is not energized, the brake is mechanically activated and the electric motor is not activated.

Here, to release (turn off) the relay 18, even if the reset button 16 is pushed in this state to change the reset terminal RE of the flip-flop circuit 17A to the high level "H", the truth value shown in FIG. As you can see, it is not released.

Therefore, this flip-flop circuit 17A
In order to cancel the above, there is no choice but to operate the inspection operation and open the inspection operation changeover switch 5A, or to close the door of the lowest floor hall and open the lowest floor hall door closing detection switch 3AA.

In the first embodiment, the normally closed contact 18b1 of the relay 18 shown in FIG. 1 is provided in series with the safety switch group 1. However, as shown in FIG. 4, the normally closed contact 18b of the relay 18 is provided.
2 is a car door close detection switch 4 and a check operation changeover switch 5
And the normally open contact 18a is connected between the car door close detection switch 4 and the other fixed contact of the inspection operation changeover switch 5 connected to the inspection operation remote control switch 13. You may

Even in the elevator control device having such a configuration, when the relay 18 shown in FIG. 1 is excited, its normally closed contact 18b1 opens and the normally open contact 18a opens, so that it is installed in a hall or a car. Even if the direction detection relay is energized by the information from the call registration button and the contact 6a or 7a is closed, the ascending operation relay 10 or the descending operation relay 11 is not energized. Therefore, the inspection operation remote control switch 13 is operated. Other than that, the basket does not move.

FIG. 5 shows a detection circuit for detecting the door opening / closing state of the lowest floor hall in the second embodiment of the present invention. The same parts as those in FIG. Omitted, different points will be described here.

In the detection circuit of the second embodiment,
As shown in FIG. 5, a D-type flip-flop circuit 17B is used, and the output terminal of the AND circuit 15 is connected to the input terminal D thereof as in FIG. Further, one end of a safety switch 1BB having a normally open contact and a normally closed contact in parallel with this contact is connected to the positive side control power source bus P1, and the other end is connected to an edge detection gate 17C in series to form a flip-flop 17B. Connect to the clock (CK) terminal. In addition, the reset button 1
The output of 6 is the clear terminal C of the flip-flop circuit 17B.
This is given to the LR.

In the detection circuit having such a configuration, each terminal level of the D-type flip-flop circuit 17B changes like the truth value shown in FIG. Now, when the clear terminal CLR is at the low level "L", that is, when the reset button 16 is not operated, the input level of the input terminal D is detected by the rise of the clock terminal CK and is output to the output terminal Q.

When a high level "H" is input to the clear terminal CLR by operating the reset button 16, the input terminal D
The output terminal Q is cleared to the low level "L" regardless of the input to the clock terminal CK.

Here, the edge detection gate 17C outputs a high level "H" of a constant cycle only when the pit safety switch is turned on or off. Such a detection circuit is constructed, and the output contact of the relay 18 is shown in FIG.
Safety switch group 1 as normally closed contact 18b1
Or a normally closed contact 18b as shown in FIG.
2. By providing the normally open contact 18a between the car door close detection switch 4 and the movable side contact of the inspection operation changeover switch 5 and the other fixed contact, the operator's operation is performed in the same manner as in the first embodiment. That is, safety can be ensured. That is, in FIG. 5, the output of the AND gate circuit 15 is held when the pit safety switch 1BB is operated. Therefore, when the work vehicle is in the pit, the output terminal Q of the flip-flop circuit 17B is held.
Is set to a high level "H", the relay 18 is excited, and the relay 18 is released when it comes out of the pit, which is convenient.

FIG. 7 shows that there is no car on the bottom floor in the third embodiment of the present invention, and it is operated by detecting whether or not the pit safety switch is operated while the door at the landing on the bottom floor is open. If not, the control circuit suppresses the operation after the door is closed.

In FIG. 7, P1 and N1 are control power source buses, and one of the control power source buses P1 is opened for inspection operation changeover switch 5A, which is opened when there is a car on the lowest floor and closed when there is no car. Bottom floor car position detection switch 14, door closing detection switch 3AA that closes when the landing door opens
One end of the series circuit of b is connected and the other end is connected to the set terminal S of the keep relay 19, and the hall door is closed between the series contacts of the lowest car position detecting switch 14 and the door closing detecting switch 3AAb. One end of the series circuit of the door open detection switch 3AAa and a normally open contact 20a1 of the relay 20 described later is connected, and the other end is connected to the reset terminal R of the keep relay 19. Further, the output terminal of the keep relay 19 is connected to the other control power source bus N1.

1BB is a pit safety switch having a movable side contact C and two fixed contacts A and B. The movable side contact C of this pit safety switch 1BB is connected to one control power source bus P.
To the fixed contact A and the normally closed contact 22A of the relay 22A.
Connect one end of the relay 21A via b
The other end of 1A is connected to the other control power bus N1. Further, a diode 24A for preventing backflow, a resistor 25A and a relay 22A are connected in series to the series circuit of the normally closed contact 22Ab and the relay 21A, and a capacitor 23A is connected in parallel to the relay 22A.

Similarly, one end of the relay 21B is connected to the fixed contact B via the normally closed contact 22Bb of the relay 22B, and the other end of the relay 21B is connected to the other control power source bus N1. In addition, a diode 24B for backflow prevention and a resistor 25 are provided in parallel with the series circuit of the normally closed contact 22Bb and the relay 21B.
B and the relay 22B are connected in series, and the relay 22
A capacitor 23B is connected in parallel with B.

Reference numeral 20 is a pit safety switch operation detection relay, and one end of this operation detection relay 20 is connected to the control power bus P1 through a parallel circuit of the normally open contact 21Aa of the relay 21A and the normally open contact 21Ba of the relay 21B. Then, the other end of the operation detection relay 20 is connected to the control power bus N1. And the normally-open contact 20a of the operation detection relay 20
2 and the normally open contact 19a of the keep relay 19 to the normally open contact 2
It is connected in series in parallel to the parallel circuit of 1Aa and 21Ba.

On the other hand, FIG. 8 shows a control circuit in which power is cut off by the normally closed contact 15b1 of the keep relay 19. The same parts as those of the prior art are designated by the same reference numerals and the description thereof will be omitted. Only the differences will be described.

In FIG. 8, the normally closed contact 19b1 of the keep relay 19 is inserted in series with the safety confirmation relay 2. Next, the operation of the elevator control device configured as described above will be described.

First, the case where the worker does not operate the in-car safety switch and the inspection operation changeover switch and enters the pit will be described. In this case, since there is no car on the bottom floor, the position detection switch 14 is closed,
Detection switch 3AAb opened by opening the lowest floor landing door
Is closed, the voltage is applied to the set terminal S of the keep relay 19, and the keep relay 19 is turned on. As a result, the normally-closed contact 19b1 of the keep relay 19 provided in series with the safety confirmation relay 2 shown in FIG. 8 is opened to turn off the safety confirmation relay 2 and open its contact 2a. Be cut off.

Next, it is assumed that the pit safety switch is operated from the B terminal side to the A terminal side with the landing door open. Then
Immediately after the operation, the relay 21A generates a one-shot output as shown in FIG. As a result, normally open contact 2
1Aa is closed, relay 20 is turned on, and normally open contact 2
The closed state of 0a2 and 19a maintains the ON state even when the normally open contact 21Aa is opened.

The worker enters the pit and closes the landing door. As a result, the door close detection switch 3AAa is closed from the open circuit, and a voltage is applied to the reset terminal R of the keep relay 10 through the normally open contact 20a1 of the relay 20 to reset it. At this time, the worker is in the pit safety switch 1BB.
Therefore, the safety confirmation relay 2 continues to be off.

In addition, in the unlikely event of an operator, the pit safety switch 1
If the BB is not operated, the keep relay 19 is kept on and the safety confirmation relay 2 is kept off, so that the car does not start.

Since the operation and the opening operation when the worker goes out of the pit to the hall are the same, they are omitted. Figure 10
Shows a fourth embodiment of the present invention, the same parts as those in FIG. 8 are designated by the same reference numerals, and the description thereof will be omitted. Here, only different points will be described.

In the fourth embodiment, as shown in FIG. 10, the normally closed contact 1 of the keep relay 19 shown in FIG. 5 is provided between the car door close detection switch 4 and the movable contact of the inspection operation changeover switch 5.
9b2 is inserted, and the normally open contact 19a of the keep relay 19 is provided between the car door close detection switch 4 and the fixed contact of the inspection operation changeover switch 5 on the inspection operation remote control switch side.
Is provided.

Even in the control circuit having such a configuration, the same function as described above can be obtained by switching to the inspection operation by the keep relay 19. That is, the only way to move the car is to operate the inspection operation remote controller.

Furthermore, when the keep relay 19 is not reset when the door is closed, that is, when the pit safety switch is not operated, an alarm can be easily issued by a bell or a buzzer.

[0064]

As described above, according to the present invention, it becomes possible to avoid the operator even if there is a human error in operating the safety confirmation switch group when working in the pit, It is possible to provide an elevator control device that can ensure the safety of workers.

[Brief description of drawings]

FIG. 1 is a configuration diagram illustrating a door open / closed state detection circuit of a lowest floor hall in a first embodiment of an elevator control device according to the present invention.

FIG. 2 is a connection diagram showing a control circuit of the same embodiment.

FIG. 3 is an explanatory diagram showing a truth value by input / output of the detection circuit shown in FIG.

FIG. 4 is a connection diagram showing a modified example of the control circuit of the same embodiment.

FIG. 5 is a configuration diagram showing a door open / closed state detection circuit of the lowest floor hall in the second embodiment of the present invention.

6 is an explanatory diagram showing a truth value by input / output of the detection circuit shown in FIG.

FIG. 7 is a connection diagram showing a control circuit for suppressing the operation after the door is closed when the pit safety switch is not operated in the third embodiment of the present invention.

FIG. 8 is a configuration diagram showing a detection circuit of a door open / closed state of the lowest floor hall of the embodiment.

FIG. 9 is a time chart for explaining the operation of the keep relay in the embodiment.

FIG. 10 is a configuration diagram showing a door open / closed state detection circuit in the lowest floor hall of the fourth embodiment of the present invention.

FIG. 11 is a connection diagram showing a control circuit in a conventional elevator control device.

FIG. 12 is a flowchart showing a work procedure during pit work.

[Explanation of symbols]

1 ... Safety switch group, 1A ... In-car safety switch,
1B: Pit safety switch, 2 ... Safety confirmation relay,
3 ... Hall door closing detection switch group, 3A to 3X ... Each floor hall closing detection switch, 4 ... Car door closing detection switch,
5, 5A ... Inspection operation changeover switch, 6a, 7a ... Direction detection relay contact, 8, 9 ... Terminal floor direction limit switch, 10 ... Upward operation relay, 11 ... Downward operation relay, 12 ... Brake coil , 13 ... Remote control switch for inspection operation, 13A to 13C ... Pushbutton switch, 3A
A: Bottom floor hall door closing detection switch, 14 ... Bottom floor car position detection switch, 15 ... AND gate circuit, 16
...... Reset button, 17A ...... Flip-flop circuit, 1
7B ... D flip-flop circuit, 17C ... Edge detection gate circuit, 18 ... Relay, 19 ... Keep relay, 20, 21A, 21B, 22A, 22B ... Relay, 23A, 23B ... Capacitor, 24A, 24B ...
… Diodes, 25A, 25B… Resistors.

Claims (6)

[Claims] 1. A driving direction detecting means for detecting a driving direction by a calling signal from the hall or the car provided that the doors of the car and all the entrances and exits of the floors of each floor are closed, and the driving direction detecting means of the car. Braking means for releasing the braking of the drive source that is driven by the power supply to drive the car only when the driving direction is detected, safety switch inside the car on the operation panel in the car, entrance to the hall provided in the pit There is a safety switch group including a pit safety switch that is operated from the hall side by opening the door with a key on condition that the car is not stopped at the door position, and these car safety switches or pit safety switches are In an elevator control device having a safety device that shuts off the power source when opened,
When the car on the bottom floor is not stopped, it operates when it detects that the door of the landing on the bottom floor is open, shuts off the power supply by its output, and resumes its operation when released. An elevator control device, which is provided with a door open detection means. 2. A driving direction detecting means for detecting a driving direction by starting with a call signal from the hall or the car on condition that all the doors of the car and all the entrances and exits of each floor are closed, and the driving direction detecting means. The braking means for releasing the braking of the drive source that drives the car by exciting it with the power source only when the driving direction of the car is detected by the car, the in-car safety switch provided on the operation panel in the car, and provided in the pit. It has a safety switch group including a pit safety switch that is operated from the hall side by opening the door with a key provided that the car is not stopped at the doorway position of the entrance and exit of the hall, and these in-car safety switches or pits In an elevator control device equipped with a safety device that shuts off the power source when the safety switch is opened, the door of the hall on the bottom floor was opened when the car was not stopped on the bottom floor. Control of the elevator, which is provided with a lowermost floor door opening detecting means that operates when the operation is detected to suppress the activation of the driving direction detecting means by the output, and that the suppression is released when the release operation is performed. apparatus. 3. A driving direction detecting means for detecting a driving direction by a calling signal from the hall or the car provided that the doors of the car and all entrances and exits of each floor are closed, and the car by the driving direction detecting means. Braking means for releasing the braking of the drive source that is driven by the power supply to drive the car only when the driving direction is detected, safety switch inside the car on the operation panel in the car, entrance to the hall provided in the pit There is a safety switch group including a pit safety switch that is operated from the hall side by opening the door with a key on condition that the car is not stopped at the door position, and these car safety switches or pit safety switches are In an elevator control device having a safety device that shuts off the power source when opened,
When the car on the bottom floor is not stopped, it is detected that the door of the landing on the bottom floor is opened, and a confirmation signal that the operation state of each safety switch of the safety device has not changed is input. An elevator control device comprising: a lowest floor door opening detecting means that operates when the power is cut off by its output, and the operation is restored when the power is released. 4. Driving direction detecting means for detecting a driving direction by starting with a call signal from the hall or the car on condition that the doors of all entrances of the car and each floor hall are closed, and the driving direction detecting means. The braking means for releasing the braking of the drive source that drives the car by exciting it with the power source only when the driving direction of the car is detected by the car, the in-car safety switch provided on the operation panel in the car, and provided in the pit. It has a safety switch group including a pit safety switch that is operated from the hall side by opening the door with a key provided that the car is not stopped at the doorway position of the entrance and exit of the hall, and these in-car safety switches or pits In an elevator control device equipped with a safety device that shuts off the power source when the safety switch is opened, the door of the hall on the bottom floor was opened when the car was not stopped on the bottom floor. Is detected, and when a confirmation signal that the operating state of each safety switch of the safety device is not changed is input, it operates to suppress the activation of the driving direction detection means by its output, and when the release operation is performed. An elevator control device comprising a lowest floor door opening detection means for releasing the suppression. 5. A driving direction detecting means for detecting a driving direction by starting with a call signal from the hall or the car on condition that all doors of the car and all entrances and exits of each floor are closed, and this driving direction detecting means. The braking means for releasing the braking of the drive source that drives the car by exciting the power source only when the driving direction of the car is detected by the car, the in-car safety switch provided on the operation panel in the car, and the pit It has a safety switch group including a pit safety switch that is operated from the hall side by opening the door with a key provided that the car is not stopped at the doorway position of the entrance and exit of the hall, and these in-car safety switches or pits In an elevator control device equipped with a safety device that shuts off the power source when a safety switch is opened, when the car is not stopped on the bottom floor, the door of the hall on the bottom floor is open. On the condition that the operation of the pit safety switch is monitored and an output signal is sent out only when the operation state does not change; and a means for suppressing the activation of the driving direction detection means by the output signal of the monitoring means. An elevator control device comprising release means for releasing the output of the start suppressing means on condition that the door of the hall on the bottom floor is closed. 6. A driving direction detecting means for detecting a driving direction by starting with a call signal from the hall or the car provided that the car and all doors of the entrances and exits of each floor are closed, and the driving direction detecting means. The braking means for releasing the braking of the drive source that drives the car by exciting it with the power source only when the driving direction of the car is detected by the car, the in-car safety switch provided on the operation panel in the car, and provided in the pit. It has a safety switch group including a pit safety switch that is operated from the hall side by opening the door with a key provided that the car is not stopped at the doorway position of the entrance and exit of the hall, and these in-car safety switches or pits In an elevator control device equipped with a safety device that shuts off the power source when a safety switch is opened, when the car is not stopped at the bottom floor, the door of the hall at the bottom floor is open. On the condition that the operation of the pit safety switch is monitored, and an output signal is sent only when there is no change in the operating state, an alarm generation means for issuing an alarm by the output signal of the monitoring means, and the monitoring A means for suppressing the activation of the driving direction detecting means by an output signal of the means, and a releasing means for releasing the output of the activation suppressing means on condition that the door of the hall at the bottom floor is closed. Elevator control device.