JPS60183479A - Rescue operating device for winding drum type elevator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operating device for a winding drum elevator.

<Technical background of the invention and its problems> In recent years, small passenger elevators for medium-rise apartment buildings of 4 to 5 stories have become popular. As this elevator,
Basement type drum elevators are suitable because they do not require a machine room on the roof, minimize hoistway space, and are cost-effective.

This type of elevator needs to keep equipment costs and running costs low, and tends not to require excessive functions. However, they generally do not have high-end private power generation facilities, and if there is a power outage, there is a good chance that passengers will be stranded. Furthermore, compared to large buildings, the power receiving equipment is relatively simple and is easily affected by other equipment in the same power receiving system. Furthermore, in this type of housing, there is a possibility that the elevator is used as a play area for children, and there is a concern that the cabana switch may malfunction due to someone jumping inside the car. The above-mentioned street or elevator in a large building.
It is thought that there is a high possibility of passengers being trapped.

However, the reality is that sufficient consideration has not been given to rescue equipment due to cost issues.

<Object of the Invention> The present invention has been made in view of the above-mentioned points, and provides a rescue operation device for a drum-type elevator that is extremely cost-effective, simple, and highly safe.

<Summary of the Invention> The present invention &:j 2. Utilizing the fact that the direction of the unbalanced torque of the car, which is a feature of the drum type elevator, is always downward regardless of the size of the load, it is possible to prevent power outages and governor switches. Detects when an abnormality occurs in motor control such as operation/motor protection relay operation, and if the car is stopped at a position other than the position where the door can be opened and closed safely, this is detected and the signal is applied to the electromagnetic brake. The current is controlled intermittently to gradually relax the car and lower the car to the landing level, thereby rescuing passengers.

<Embodiments of the invention> Fig. 1 shows a schematic diagram of the drive system of the drum type elevator.

When going up and down, the coil of the electromagnetic brake 2 is energized to release the brake, and the motor 1 is rotated to drive the winding drum 4 via the reducer 3. The car 6 is raised and lowered by the winding drum 4 winding or unwinding the rope 5.

FIG. 2 shows a circuit for detecting a rescue condition and issuing a rescue operation command in an embodiment of the present invention.

A power failure detection relay J is installed between the main power switch 130 and the secondary line.
7 was established. On the other hand, the DC outputs P1 and 8 of the power supply device will be described later.
In between, the normally closed contact 17b of the power failure detection relay 17, the normally open contact 15 of the governor switch, and the normally open contact 16 of the motor protective relay shown in FIG. A circuit in which an on-delay timer 18 is connected in series with this through an auxiliary contact 14 linked to the opening and closing of the main power switch 13, a normally open contact 18a of this on-delay timer 18, and a rescue operation command connection 19 were connected in series.

The control power supply device 12 obtains power for control circuits such as relays, contactor 1 electromagnetic brakes, and door motors required during normal operation.

FIG. 3 shows a rescue operation control circuit for controlling the inner electromagnetic brake and driving the car downward according to the embodiment.

Reference numeral 21 denotes a power supply device equipped with a battery and a charger that constantly charges the battery.The output side of this power supply device 21 is connected to a normally open contact 19a of a rescue operation command relay 19 to detect a position where a passenger can escape. A relay 24 that operates intermittently and is connected in series with a door open zone detection switch 22 that opens.
, an auxiliary relay 25 connected in series with the normally open contact of this relay 24 and having the ability to control opening/closing of the electromagnetic brake, and a buzzer connected in parallel to this auxiliary relay 25 to alert passengers that a rescue operation is in progress; The normally open contact 25a of the auxiliary connector 25 is connected to an electromagnetic brake connected in series.

The power supplies R,,,8, of the charger of the power supply device 21 are connected to the AC power supplies R,,S,VC shown in FIG. 2, and the DC' power supplies P,, N of the rescue operation command circuit shown in FIG. are connected to the outputs P, , N of the power supply device 21 shown in FIG.

In this embodiment, an on/off delay timer is used for the relay 24 that operates intermittently.

The normally open contact 27a of the relay shown in FIG.
This is a contact that is included in the elevator control device 11 shown in the figure and controls the opening and closing of the electromagnetic brake during normal operation, and has no direct relation to the present invention.

The operation of this embodiment will be explained below.

For example, if an elevator were to ascend from the 1st floor to the 5th floor while carrying passengers, and a power outage occurred near the midway between the 2nd and 3rd floors, the motor power would be cut off and the control power supply would be turned off.
, N is also de-energized, and the brake coil 2C installed between PO and 8 shown in FIG. 2 is also turned off, and the elevator stops between floors, leaving passengers trapped. At this time, power failure detection relay 17
is turned off, but in this case, the main power switch 13 is in the on state, so the interlocking contact 14 is in the closed state, and the power failure detection relay 1 is in the closed state.
It becomes possible to determine that the reason why the normally closed contact 17b of No. 7 is closed is not due to the artificial interruption of the main power switch, but is due to a power outage. Therefore, a circuit P+ -17b -14-1,8-N is established, and the on-delay timer 18 is turned on after a predetermined time has elapsed. The setting value of the on-delay timer 18 may be approximately the time required for the running elevator to stop. As a result, the contact 18a turns on the rescue operation command relay 19, so that the contact 19a shown in FIG. 3 operates.

In FIG. 3, the contact 27a of the main relay (not shown) of the brake coil circuit is turned off with the power outage and thereafter stops operating. Therefore, subsequent control power is supplied from the power supply device 21.

The position of the elevator that has stopped as described above is between floors, and the door open zone detection switch 22 is in the off state, causing dust,
-22-24-N circuit, the timer 24 is
), the on/off operation is repeated. Therefore timer 2
Since the auxiliary brake connector 25 is turned on and off by the normally open contact 24a of No. 4, the current flowing through the brake coil 2C through the normally open contact 25a flows as shown in Fig. 4 (cl), and this current The brake suction is repeated when the magnitude level is Ip level, and the brake release is repeated when it is D level.

Further, a buzzer 26 provided in parallel with the auxiliary relay 25 is used for alarm purposes, and notifies passengers in the car that a rescue operation is in progress.

As can be seen from Fig. 1, in a drum type elevator, the load torque is in the downward direction, so there is always a force acting to cause the elevator to fall. Therefore, when the electromagnetic brake is repeatedly turned on and off as described above, the car descends by an amount corresponding to the on time of the brake coil 2c, that is, the brake relaxation time, as shown in the car lowering speed Vc in FIG. 4(d). The distance of descent is expressed by the area of the triangle. As can be seen from FIG. 4, when increasing the descending speed, T1 and T2 should be made longer. Since safety decreases as the Shikajiramashi speed increases, it is necessary to keep it to an appropriate value. Note that this value may be adjusted as appropriate depending on various factors such as the weight of the car, gear efficiency, and brake operation time.

Also, depending on the number of passengers in the car, Vc shown in Figure 4 (dl)
changes, but the impact is relatively small for this type of elevator with a small capacity.

However, when the car gradually descends and approaches the landing level and reaches the door open zone, the door open zone detection switch 22
turns off. This will stop the on/off operation. Therefore, the on/off operations of the auxiliary relay 25, the buzzer 26, and the brake all stop. The door opening zone is approximately ±100 mm from the landing level, and the car can be placed on the floor within this range. Therefore, since the load on the power supply device 21 is mainly the brake current ID for a short time, a small capacity battery is sufficient. After this, it is possible to either drive the door control device with the power supply and have the door open automatically, or use an indicator light to instruct the passenger to open the door manually and have them escape from the car. be.

The rescue operation in the case of a power outage between floors has been described above, but if the power outage occurs when there is a car at the landing level, that is, within the door opening zone, the rescue operation circuit will not operate and will remain as it is.

Next, cases other than power outage will be explained. In parallel with the normally closed contact 17b of the power failure detection relay 17 shown in FIG. 2, the normally open contact 15 of the governor switch and the normally open contact 16 of the motor protection relay.
However, in the former case, if a passenger jumps inside the car, the governor switch will malfunction, and in the latter case, when there is an abnormality in the power supply or the motor is overloaded, the protective joint 'i1 will be activated, and the passenger will be trapped in the car. This is for rescue purposes in the event of a power outage, and functions in the same way as in the case of a power outage.

Continuous operation is impossible with the operation of safety devices such as the governor switch and the motor's protective relay, but if the motor is not driven and is lowered by its own weight to the nearest floor, there is no major safety problem, and it is possible to set it up in a canned position. This is effective in the sense of reducing as much as possible. As mentioned above, when a trouble occurs that does not impede the descent of the car, a rescue operation command is output and rescue is carried out in the same way as in the case of a power outage. In addition, contact points 15 and 16
Of course, no matter which operation is activated, a safety circuit (not shown) in the control device 11 is simultaneously disconnected and the brake soil relay contact 27a shown in FIG. 3 remains OFF.

As described above, according to this embodiment, when the car stops midway between floors due to a power outage, governor switch operation, or motor protection relay operation, the car is gradually lowered, so it does not reach overspeed and the emergency stop device is activated. There is no need to work, the landing accuracy is high, and safe rescue is possible.

In the embodiment described above, the landing floor was set to the lower nearest floor, but if there is sufficient battery capacity, it is also possible to specify a specific floor such as the standard floor, such as the first floor. This can be achieved by providing a specific floor detection relay contact in series with the door open zone detection switch 22.

Furthermore, it would be possible to carry out a rescue operation regardless of the presence or absence of passengers in the car, but if there is no passenger detection device, for example, load detection output, it would be possible to assume that there are no passengers and disable the rescue operation.
In addition to power outages, we also targeted rescue when the governor switch and motor protection relay were activated, but other safety switch contacts may be added as long as they do not interfere with the downward operation of the car even during an emergency stop. Furthermore, the governor switch and motor protection relay may not be provided if they are unnecessary.

<Effects of the Invention> As explained above, according to the present invention, even if the car loses power in the middle between floors, the electromagnetic brake is gradually relaxed to the extent that it does not hinder the car's descent, and the weight of the car is used to Because it is lowered, no driving force is required, and it can be operated with small capacity and battery power.
In addition, since the control device requires only a simple configuration, it is extremely advantageous in terms of cost, and is ideal for low-cost elevators.

In addition, since the descending speed can be kept low, the rescue operation is safe and the accuracy of dust landing is high, making it possible to provide a highly reliable rescue operation device.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of the drive system of a drum type elevator, Figures 2 and 3 are diagrams showing embodiments of the present invention, Figure 2 is a rescue operation command circuit, and Figure 3 is a rescue operation control. The circuit shown in FIG. 4 is a diagram for explaining the operation of FIGS. 2 and 3. 1... Motor 2... Electromagnetic brake 2c... Electromagnetic brake coil 4... Winding barrel 6... Car 15... Governor switch 16... Motor maintenance relay 17... Power failure detection relay 19...・Rescue operation command circuit 22 ・Door open zone detection switch 24 ・Intermittently operating relay (7317) Patent attorney Noriyuki Noriyuki (and 1 others)
Figure 1 Figure 3 Figure 4

Claims (1)

[Claims] An abnormality has occurred in the control of the motor in a winding drum type elevator that lifts and lowers the car by suspending it on a rope wrapped around a winding drum driven by a motor, and obtains braking force for the winding drum using an electromagnetic brake. The current flowing through the rescue operation command device which detects this and outputs a rescue operation command, and the electromagnetic brake which responds to the output of this rescue operation command device and detects the position where the door can be opened and closed safely and stops the door is intermittent. A rescue operation device for a drum-type elevator, comprising a rescue operation control device that controls and relaxes.