JPS6117748B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an elevator equipped with a derailment detection device that detects derailment of a car and a counterweight during an earthquake and issues a command to an elevator control device.

Generally, as an earthquake countermeasure for elevators, elevators are switched to controlled operation when an earthquake occurs. In other words, an earthquake sensor is attached with a set value corresponding to the acceleration of the earthquake, and class control operation is performed based on signals from the sensor. For example, if the acceleration of an earthquake detected by a sensor is 80 gal, even if the elevator encounters the earthquake on an intermediate floor, it will not stop immediately, but will stop after reaching the nearest floor, and the acceleration of the earthquake will be reduced. If the level reached 150 gal, the elevator would be stopped immediately, wait for the earthquake to stop, check for any malfunctions, and resume operation if there were no abnormalities such as rail derailment.

Here, the derailment detection device detects the derailment of the car or counterweight caused by the above-mentioned earthquake and sends a signal to the elevator control device. It is always operable even in a normal state, and when the elevator is in normal operation, a malfunction occurs in which a derailing detection operation is performed even though the elevator has not derailed, and a detection signal thereof is sent to the elevator control device. This is a problem that cannot be tolerated in terms of elevator operation control. The main cause of such malfunctions is that high-rise buildings with flexible structures designed to resist earthquakes can sway due to wind, so for example, the derailment detection device in Japanese Patent Application Laid-open No. 134047/1983 may cause the detection wire to sway and malfunction. becomes. In addition, the detection line may sway due to the wind pressure of the high-speed elevator itself, and in high-rise buildings, the detection line may also sway due to upward airflow in the elevator hoistway.
These conditions caused malfunctions. Furthermore, during maintenance and inspection, there were other causes such as the malfunction of the rail derailment detection device due to human error.

In addition, the above-mentioned rail derailment detection device has a long detection line stretched inside the hoistway, and once it sways, vibration damping takes a relatively long time, and considering the effects of wind pressure etc. mentioned above, it is constantly swaying. Therefore, if the detection accuracy was lowered to prevent malfunctions due to such shaking, there was a problem that the detection operation would be incorrect in the unlikely event that the rails were to come off due to an earthquake.

The present invention has been made in view of the above circumstances, and its purpose is to lock the function of the rail derailment detection device to stop during normal times, eliminate any malfunction due to wind pressure, etc., and prevent the earthquake sensor from reaching the set value. It is an object of the present invention to provide an elevator which is unlocked when the above-mentioned vibrations are detected, and the function of a rail derailment detection device is activated, and the derailment caused by the earthquake can be reliably detected and accurate operation control possible.

An embodiment of the present invention will be described below with reference to the drawings.

Fig. 1 is a block diagram of the present invention, in which 1 is an elevator control device, 2 is an earthquake sensor that emits a signal when the acceleration of an earthquake exceeds a certain set value, and 3 is a device that prevents the car or counterweight from coming off the rails. The elevator control device 1 is connected to an earthquake sensor 2 and uses the signal to perform controlled operation according to the magnitude of earthquake acceleration. The signal is used to control the elevator stop or stop at the nearest floor. Here, reference numeral 4 in the figure is a lock device that always locks the function of the rail derailment detection device 3 to stop it under normal conditions. The lock of the derailing detection device 3 is released by receiving the signal when the derailing occurs. Therefore, during normal times other than earthquakes, the rail derailment detection device 3 stops functioning completely and may cause malfunctions such as sending a derailing signal to the elevator control device due to wind pressure or the like even though the rail is not derailing. If the car or counterweight should come off the rails due to an earthquake, it will be detected immediately and a signal will be sent to the elevator control device 1, which will cause the elevator to stop or stop at the nearest floor. Accurate controlled operation will be carried out.

Next, the elevator derailment detection device 3 of the present invention
A specific example of the lock device 4 will be explained with reference to FIG. Here, the rail derailment detection device 3 is the rope 1
1 is connected to a car (not shown) and moves up and down along the guide rails 12, 12. The counterweight 13 is connected to the car (not shown) and moves up and down along the guide rails 12, 12. A cylindrical detection cam 17 is provided above the upper spring 16 whose lower end is in contact with the receiver 15. A detection wire 18 is suspended from the cam 17 in the hoistway 14, and its lower end is connected to the hoistway. 1
4. The upper and lower springs 1
6 and 20, the detection wire 18 is able to move up and down under tension and is held at a neutral position in the vertical direction during normal times, and the above-mentioned detection cam 17, which moves up and down together with it, also maintains a fixed position during normal times. ing. The detection cam 17 has a concave groove part 17a in the middle, and a detection switch 22 is arranged on one side of the concave groove part 17a. The contact 22a of the detection switch 22 normally enters the recessed groove 17a and remains in the OFF state, and when the detection cam 17 moves upward or downward together with the detection wire 18, the contact 22a moves inside the detection cam 17. Pushed out from the concave groove 17a and turned ON
I'm starting to do that.

On the other hand, at the top and bottom of one side of the counterweight 13, there is a gripping mechanism 23 that grips the detection wire 18 only when the counterweight 13 comes off the rail.
This gripping mechanism 23 moves the detection wire 18 upward when the counterweight 13 comes off the rail when it is ascending, and moves the detection wire 18 downward when it comes off the rail when descending. Since the wire 18 rises or falls together with the wire 18, the detection switch 22
When turned on, a rail derailment detection signal is sent to the elevator control device 1 (see Fig. 1).

The locking device 4 for such a rail derailment detection device 3 is of an electromagnetic type as shown in FIGS. 2 and 3, and includes an electromagnetic coil 24 and a latch 25 at the tip.
The armature 25 is composed of an armature 25 having a diameter of
4 is not energized, the latch 25a at the tip of the armature 25 is connected to the detection cam 17 as shown in FIG.
The cam 17 is engaged in the groove 17a of the cam 17 to prevent the vertical movement of the cam 17, thereby completely stopping the function of the derailing detection device 3. When the electromagnetic coil 24 is energized, As shown, the armature 25 is attracted against the spring 26, and the latch 25
a retreats to release the lock and the detection cam 17 can move up and down, and only then does the function of the rail derailment detection device 3 begin to function.

Here, a circuit for energizing the electromagnetic coil 24 so that the locking device 4 performs the unlocking operation of the derailing detection device 3 described above will be explained with reference to FIG. 4. )'s earthquake detection sensor AC is activated when the earthquake acceleration reaches a predetermined set value or higher, thereby triggering the relay RY.
When the contact RY-a is energized, the electromagnetic coil 24 shown by Mg of the locking device 4 is energized and the contact RY-a is closed, and the reset push button is pressed.
The electromagnetic coil 24 is configured to remain energized until RS is pressed.

To explain the operation of the above configuration, the sensor AC of the earthquake detector 2 does not operate at all during normal operation of the elevator, that is, at times other than when an earthquake occurs, so the electromagnetic coil 24 of the lock device 4 is energized. With this, latch 2 of armature 25
5a locks the detection cam 17 of the off-rail detection device 3, completely preventing its vertical movement.
As a result, the rail derailment detection device 3 is completely unaffected by external disturbances, such as the detection wire 18 shaking due to wind pressure, except during earthquakes, and its function is completely stopped.

Generally, the derailing phenomenon of the counterweight 13 occurs due to complicated polymerization conditions, but it is normally designed to prevent the counterweight from derailing if the earthquake acceleration is within a certain set value guaranteed. If this occurs, it is when the seismic acceleration exceeds the set value. Therefore, in normal times when the seismic acceleration is below the set value, there is no problem even if the rail derailment detection device 3 is locked as described above, and on the contrary, even if the derailment detection device 3 is not derailed, it may occur due to various causes such as wind pressure even though the derailment has not occurred. Malfunctions such as when the rail derailment detection device 3 operates and sends a signal to the elevator control device are prevented.

When an earthquake occurs under these conditions and the acceleration of the earthquake reaches the set value or higher, the sensor AC of the earthquake sensor 2 is activated, and the relay RY is activated.
The electromagnetic coil 24 of the device 4 is connected via the same contact point Y-a.
(Mg) is energized and self-held by the contact Mg-a. As a result, the armature 25 is attracted, the latch 25a is disengaged from the cam 17, and the derailing detection device 3 is unlocked and can perform its normal function. That is, when the acceleration reaches a set value or more due to the occurrence of an earthquake, the locking device is released by a signal from the earthquake sensor 2, and the derailment detection device 3 is utilized to prepare for derailment.

Here, when the counterweight 13 comes off the rail, its gripping mechanism 23 grips the detection wire 8 and moves the detection wire 18 in the same direction as the counterweight 13 is raised or lowered, and the detection cam 17 interlocked with this It also moves upward or downward within its operating range. With this, the contact 22a of the detection switch 22 is pressed and the switch 2
2 is turned on, a rail derailment detection signal is sent to the elevator control device 1, and the operation is controlled according to the command to stop the elevator immediately or stop it at the nearest floor.

In the description of the above embodiment, the off-rail detection device 3 is used to detect off-rail of the counterweight 13, but it can be used to detect off-rail of a car (not shown) in exactly the same way.

Further, in the above embodiment, an electromagnetic locking device 4 for mechanically stopping the function of the rail derailment detection device 3 was used, but in the present invention, an electric circuit type locking device 4a as shown in FIG. 5 may be used. This means that when earthquake sensor 2 detects an earthquake acceleration that is higher than the set value and operates, relay ARY ₁ is operated and energized, and the same contact ARY ₁ -a is connected, which energizes relay ARY ₂ . The contact ARY ₂ -a is inserted to maintain the self-holding state, and the contact ARY ₂₁ -a is inserted to send the signal from the rail derailment detection device 3 to the elevator control device 1. The detection device 3 is always operable, but by turning on and off the electric signal circuit, the function of the rail derailing device 3 is activated only when an earthquake occurs, and is disabled during other normal times. .

The present invention provides a locking device for locking the function of the rail derailment detection device as described above, and
Since the earthquake sensor unlocks the locking device only when the earthquake acceleration exceeds a set value, the rail derailment detection device does not function at all during normal operation or during maintenance inspections when the elevator is stopped. The rail derailment detection device will function only when the earthquake acceleration exceeds the set value, so even if the rail is not derailed under normal conditions, the derailment detection signal may be generated due to external conditions such as wind pressure. Malfunctions such as those caused by the elevator control device do not occur at all.

In the event of an earthquake, the rail derailment detection function can be used to reliably detect a derailed rail, making it possible to control elevator operation with high reliability and no malfunction.

[Brief explanation of the drawing]

Figures 1 to 4 show an embodiment of the present invention, Figure 1 is a block diagram, Figure 2 is a schematic diagram of the rail derailment detection device and locking device, and Figure 3 is a lock release of the locking device. FIG. 4 is a partially enlarged view showing the state, FIG. 4 is an electric circuit diagram, and FIG. 5 is an electric circuit diagram in another embodiment of the present invention. 1...Elevator control device, 2...Earthquake sensor, 3...Rail derailment detection device, 4, 4a...Lock mechanism device.

Claims (1)

[Claims] 1 Elevators equipped with an elevator control device that controls the operation of the elevator car and the counterweight, and a rail derailment detection device that issues commands to this control device, are equipped with an earthquake detector, and the above-mentioned An elevator characterized in that it is provided with a locking device that stops the function of the rail derailment detection device and activates the function of the rail derailment detection device when the seismic sensor detects a seismic intensity higher than a set value.