JPS6122664B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrical circuit for an elevator, and more particularly to a circuit arrangement intended to save power in the electrical circuit of an elevator.

Conventionally, when stopping an elevator, the parking switch is set in operation and when the elevator reaches a reference floor, the operation is stopped and the door is opened. Thereafter, the elevator interior lighting switch or fan switch, etc. is manually turned off, and the parking switch is switched from preparation to stop, thereby closing the elevator door and parking the elevator, thereby stopping all elevators. Furthermore, when the parking switch is turned off from operation, the elevator in operation comes to the standard floor, the door is opened once and then closed, and the elevator is stopped, but the lights, etc. inside the elevator remain powered. FIG. 1 shows such a conventional circuit.

In Figure 1, NVR is a voltage relay, PAK is a parking relay, YPAK and XPAK are parking auxiliary relays, DT is a door opening relay,
MGT is a relay for elevator main generator operation, FAN
is a fan inside the elevator car, LP is a lighting light inside the car during elevator operation, and STP is a lighting light inside the car during elevator power outage. R and S are a pair of control power bus lines derived from the elevator power supply system, and P and N are a pair of control power bus lines derived from an uninterruptible power source other than the elevator power source, such as a storage battery.

The voltage relay NVR determines the presence or absence of voltage on the control power supply buses R and S. Parking relay PAK is
On the other hand, the auxiliary relay YPAK contact (hereinafter referred to as "A contact")
) is excited via YPAK ₁ and
On the other hand, the door closed detection relay DCR (not shown)
It is excited through the normally closed contact (hereinafter referred to as "b contact") DCR ₂ of the parking relay PAK and the a contact PAK ₁ of the parking relay PAK. A b contact HF ₂ of a reference floor detection relay HF (not shown) is connected in parallel to the contact DCR ₂ . The auxiliary relay YPAK is the ready position contact 2 of the parking switch PAKS, and the voltage relay
It is excited via the a contact NVR ₁ of NVR ₁ . The auxiliary relay XPAK is on the one hand the parking switch
Operation position contact 3 of PAKS and a of relay DT
It is energized through a parallel circuit of contact DT ₁ and self-holding a contact XPAK ₁ , and on the other hand, it is energized through b contact YPAK ₂ of auxiliary relay YPAK. Relay DT is the a contact of the standard floor detection relay HF.
It is excited via HF ₁ , the b contact XPAK ₂ of the auxiliary relay XPAK, and the b contact UD ₂ of the driving relay UD (not shown). Relay MGT is energized via a contact PAK ₃ of parking relay PAK. The fan FAN is operated via the lighting switch LPS ₁ and the fan switch FANS. The lighting lamp LP is turned on via the lighting switch LPS ₁ . lighting lamp
STP is turned on via the b contact NVR ₂ of the voltage relay NVR and the lighting switch LPS ₂ . In addition,
It is assumed that the lighting switches LPS ₁ and LPS ₂ are configured as interlocking switches. parking switch
PAKS has a parking position contact 1 in addition to the aforementioned preparation and operation position contacts 2 and 3, but this contact 1 is an idle contact that is not connected to anything.

In the circuit shown in Fig. 1 configured as above, when parking switch PAKS is changed from operation ₃ to preparation 2, auxiliary relay XPAK is turned off, and when the car reaches the reference floor, contacts _{HF 1} , The door opening relay DT is energized through the relay DT to open the door. In this state, by turning off the lighting switches LPS ₁ and LPS ₂ , the lighting lamp LP and fan FAN are turned off, and at the same time, the lighting lamp STP for power outage is also not turned on.

By turning off the lighting switches LPS ₁ and LPS ₂ and setting the parking switch PAKS to parking 1, the auxiliary relay YPAK is turned off, and its contact
Auxiliary relay XPAK is energized via YPAK ₂ . This opens contact YPAK ₂ , turns off the door opening relay DT, and closes the elevator door. On the other hand, when auxiliary relay YPAK is turned off, its contact YPAK ₂ is also opened, so parking relay PAK is also turned off. When parking relay PAK is turned off, contact PAK ₃ is also opened, generator operation relay MGT is turned off, and the elevator main power generator (not shown) is stopped.

According to the conventional circuit described above, for example, it is likely that multiple elevators will be installed in the same job in the future, and in such cases, it is necessary to turn off the light switch for each elevator. It takes a considerable amount of time to install the parking switch on the monitoring panel.
It requires even more time and effort. Also,
When the parking switch is suddenly changed from the operating position to the parking position, the elevator comes to the reference floor during operation, opens the door once, closes the door again, and then enters the parking position.

The present invention is characterized in that the lights in the elevator are turned off and the fans in the elevator are turned off as soon as the parking switch is set to the parking position in order to save unnecessary power consumption that occurs in such a state.

Hereinafter, the present invention will be explained in more detail with reference to embodiments shown in the drawings.

FIG. 2 shows a main part of an embodiment of the present invention. That is, FIG. 2 shows only the circuit portion of the relay circuit shown in FIG. 1 that includes the portion changed according to the present invention and the circuit portion of the newly added auxiliary relays A and B. is the same as that in FIG.

In the circuit shown in Fig. 2, the a contact PAK ₅ of the parking relay PAK is connected in series to the common lighting switch LPS ₁ of the excitation circuit of the elevator car lighting lamp LP and the fan FAN as the contact that opens during parking.
Insert and connect this contact PAK ₅ to the a of auxiliary relay A as a contact that closes in the event of a power outage during operation and remains open in the event of a power outage while parking.
Contacts A ₃ are connected in parallel. Lights for power outages
In the same way, the STP excitation circuit has the a contact PAK ₇ of the parking relay PAK and the a contact A ₅ of the auxiliary relay A.
The parallel circuit with is connected in series.

Auxiliary relays A and B are both relays that are supplied with power from uninterruptible control power supply buses P and N, and each has a series circuit of resistor R ₁ and capacitor C ₁ , or a series circuit of resistor R ₂ and capacitor C ₂ . By connecting them in parallel, it is configured to function as an off-delay timer. The excitation circuit of auxiliary relay A consists of its own a contact A ₁ and auxiliary relay XPAK.
b contact XPAK ₄ , and b contact of auxiliary relay B
It consists of a parallel circuit of a series circuit of B ₂ and a series circuit of the b contact PAK ₂ of the parking relay PAK, the b contact YPAK ₄ of the auxiliary relay YPAK, and the a contact B ₁ of the auxiliary relay. Auxiliary relay B is energized via a contact PAK ₉ of parking relay PAK.

According to the circuit shown in Figure 2, when the parking switch PAKS is set to parking position 1 for parking, the elevator returns to the standard floor and opens the door once.
After a certain period of time, the door is closed, and as already explained, the auxiliary relay YPAK turns off, the auxiliary relay XPAK turns on, and the parking relay PAK turns off, resulting in the parking state. and parking relay
Since the PAK is turned off, the light LP, fan FAN, and power outage light STP are also turned off. but,
If the parking relay PAK turns off during a power outage in the elevator during operation, the power outage lighting light will be activated.
This is inconvenient because the STP will not light up at all. Therefore, auxiliary relays A and B determine whether the power outage occurs during parking or during driving. An uninterruptible power supply is used as the power source for auxiliary relays A and B, and if the elevator power supply fails, each relay XPAK,
YPAK and PAK are all turned off, but auxiliary relays A and B operate as follows in cooperation with the off-delay characteristics of the parallel RC circuit.

First, if a power outage occurs while the elevator is in operation, the parking switch is
PAKS is in operating position 3 and parking relay PAK is self-holding. Therefore, auxiliary relay B is energized via contact PAK ₉ and auxiliary relay A is off until just before the power outage occurs. Due to a power outage, contact PAK ₉ is momentarily opened and the excitation of auxiliary relay B is cut off, and the parking relay
PAK turns off and contact PAK ₂ returns to the closed position. Here, when both contacts PAK ₂ and YPAK ₄ are closed, contact B ₁ remains closed for a while due to the off-delay characteristics of auxiliary relay B.
The excitation circuit for auxiliary relay A is completed. When the off-delay time of auxiliary relay B comes, contact B ₁ turns off and contact B ₂ returns to on. If auxiliary relay A does not have an off-delay characteristic, contact B ₂ returns to on and contact A ₁ returns to on. The off operation of auxiliary relay A is performed at the same time, and eventually auxiliary relay A is also turned off. However, by providing the auxiliary relay A with an off-delay characteristic, the auxiliary relay A maintains its self-holding state until the contact _B2 completely returns to the closed position, so the auxiliary relay A maintains its self-holding state.

The next case is when a power outage occurs while parking, but in this case, it is first necessary to consider the on/off status of each relay during parking. Parking switch for parking
When PAKS is set to parking position 1, as described above, after the elevator car returns to the reference floor, auxiliary relay YPAK is turned off, auxiliary relay XPAK is turned on, and parking relay PAK is further turned off to enter the parking state. Therefore, during parking, contact PAK ₉ is off, so auxiliary relay B
is not energized and therefore contact B ₁ is off,
Since contact XPAK ₄ is off, auxiliary relay A is also not energized. If a power outage occurs while the relay circuit is in this state during parking, the auxiliary relay XPAK is turned off. However, even if _auxiliary relay
Both remain in the off state (non-excited state).

Depending on whether or not auxiliary relay A is energized as described above, it is possible to determine whether the power outage is occurring during driving or during parking. This auxiliary relay A
A contacts A ₃ and A ₅ are used as parking relays, respectively.
By connecting the PAK's a _contacts PAK ₅ and PAK ₇ in parallel and in series with _{the switch LPS 1 or LPS 2 , the fan} can The FAN and driving lights LP are connected to contact PAK ₅ during normal operation.
Even if a power outage occurs during operation, it will remain on as long as the control power bus RS does not experience a power outage. If a power outage occurs during or during parking, both contact PAK ₅ and contact A ₃ are open, so the fan FAN and the lighting lamp LP are turned off, achieving the intended power saving purpose. Next is the power outage lighting STP, which does not turn on during normal operation or even when parking because the contact NVR ₂ of the voltage relay NVR is open unless a power outage occurs. However, only when the power goes out from the operating state, contacts NVR ₂ and A ₅ are closed, and the lighting lamp STP is turned on to ensure safety and prevent confusion. If a power outage occurs during parking, both contacts PAK ₇ and A ₅ will open, so
The lighting light STP remains off. In this case, of course, there is no need to turn on the light, which suits the purpose well.

As described above, according to the present invention, simply by setting the parking switch PAKS to parking position 1,
The power supply to the loads such as the elevator lighting lights LP and fans FAN can be automatically stopped when the elevator reaches the standard floor and the door is opened and then closed after a certain period of time. There is no longer a need to wait for the parking switch to arrive, and if the parking switch is installed on the monitoring panel, the lighting lights and fans in the elevator can be turned off at the same time by simply setting the parking switch to the parking position on the monitoring panel. In that case, as described above, if a power outage occurs during operation, from a safety standpoint, power supply will continue until the standard floor is reached and a certain period of time has passed after the door is opened.

[Brief explanation of the drawing]

FIG. 1 is a connection diagram of an electrical circuit of a conventional elevator, and FIG. 2 is a connection diagram of an embodiment of the present invention. LP...Lighting inside the car during operation, FAN...Fan inside the car, STP...Lighting inside the car during power outage,
PAK...Parking relay, NVR...Voltage relay, PAKS...Parking switch, A, B...
Auxiliary relay.

Claims (1)

[Claims] 1. An operation relay, a parking relay, and loads such as lighting lights and fans in the elevator that are connected to the elevator power source, and a first relay that is connected to the uninterruptible power source.
an off-delay timer and a second off-delay timer, the driving relay is turned on when the parking switch is placed in the driving position, and turned off when the parking switch is placed in the parking position, and the parking relay is turned on when the parking switch is placed in the parking position. When the parking switch is changed from the parking position to the operating position, it is turned on, and when the parking switch is changed from the operating position to the parking position, the elevator returns to the reference floor and opens the door for a certain period of time, and then turns off, and the first off-delay is turned off. a normally open contact of the parking relay, and a second off-delay timer energized through a normally closed contact of the parking relay and a normally open contact of the first off-delay timer;
a normally closed contact of the first off-delay timer;
The load is self-maintained through a normally closed contact of the driving relay and its own normally open contact, and the load is connected to a parallel circuit of a normally open contact of the parking relay and a normally open contact of the second off-delay timer. An elevator electric circuit characterized in that power is supplied through the elevator.