JP4597174B2 - Elevator equipment - Google Patents

Description

  The present invention relates to an elevator apparatus that performs control operation in the event of an earthquake or strong wind.

  At the time of an earthquake, a longitudinal wave (P wave) with a high propagation velocity and a transverse wave (S wave) with a slow propagation velocity but the main motion of the earthquake reach the building from the epicenter. Conventionally, an initial swing control operation is performed in which an elevator is stopped at the nearest floor by detecting an initial swing of a building due to a P wave before the arrival of an S wave. Here, the initial shaking of the building refers to the initial shaking of the building that is sensed when the earthquake arrives, and is not limited to the shaking at the time of initial microtremor in earthquake engineering. An example of such initial swing control operation is shown in Non-Patent Document 1 below.

  According to this non-patent document 1, P waves are detected from the vertical acceleration of the floor near the base of the hoistway or the floor of the building, and the S wave is detected by a horizontal omnidirectional acceleration sensor installed at the top of the building such as a machine room. The elevator is controlled during an earthquake.

  Further, in Patent Document 1 below, when a sensor provided in a pit detects an acceleration of 10 Gal or more in the vertical direction, the car is stopped to the nearest floor (P wave control operation), and then a predetermined time has elapsed. Thus, there is disclosed an elevator that performs a predetermined control operation (S-wave control operation) when a sensor provided in the machine room detects a predetermined acceleration in the horizontal direction.

JP 2007-91460 A (paragraph number 0014, FIG. 3 etc.) 2002 edition, Ministry of Land, Infrastructure, Transport and Tourism Housing Bureau Building Guidance Division, Japan Building Equipment and Elevator Center, Japan Elevator Association

  The conventional control operation described above is composed of a P-wave control operation and an S-wave control operation. For example, in the invention described in Patent Document 1, a sensor provided in the vicinity of a pit is accelerated in the vertical (vertical) direction. As long as at least 10 Gal is not detected, not only the P wave control operation but also the S wave control operation is not started. However, in reality, even if the acceleration of mainly vertical vibration corresponding to the P wave is smaller than 10 Gal, the horizontal vibration corresponding to the S wave may be increased. May not be done. Even if the S-wave control operation is performed by detecting a large horizontal shaking, the start of the control operation may be delayed.

  Furthermore, in the above-described conventional control operation, when the P-wave detector detects a predetermined acceleration or more in the vertical direction and the initial shake control operation mode is started, the car is stopped at the nearest floor and the subsequent shake is performed. Regardless of whether the car is waiting for a certain time on the nearest floor. Here, the fixed time is a long time in which the shaking is settled regardless of any earthquake, and is generally about 1 minute. Therefore, even if the vibration does not continue until the control operation is continued, the car is unnecessarily put on standby, and there is a possibility that it takes a long time to return to the normal operation.

  On the other hand, in the conventional control operation described above, since normal operation is automatically restored after about 1 minute has passed, the initial shake control operation has been completed for long-period ground motion that lasts several minutes. Nevertheless, the ropes have problems that cause the passengers to feel uneasy due to the swinging out of the ropes and cause the rope to be caught in the hoistway.

  An object of the present invention is to provide an elevator apparatus that quickly starts control operation based on an initial shake of an earthquake and the like, and that quickly returns to normal operation for a shake that does not require continuation of the control operation.

In an elevator apparatus in which an acceleration sensor for detecting vibrations of a building is installed in a building including an elevator hoistway, and the building shake control operation is performed during an earthquake or strong wind using the acceleration sensor, the acceleration is The vertical and horizontal accelerations are detected by the sensor, and when the judgment value calculated using the vertical and horizontal accelerations exceeds the first threshold, the moving car is stopped at the nearest floor. The car that is opened and stopped is controlled to open, and when a predetermined time elapses from the time when the first threshold is exceeded , the judgment value within a certain time before the elapse of the predetermined time maximum the determination value is a return to normal operation in the case of less than the second threshold value, door closing and by resting the operation when the determination value exceeds the second threshold value of the predetermined time the Was time corresponding to the natural period of vibration of the object.

  According to the present invention, it is possible to provide an elevator apparatus that quickly starts control operation based on an initial earthquake shake or the like, and quickly returns to normal operation for a shake that does not require continuation of control operation. And inconvenience can be reduced.

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

  The construction of the elevator according to the embodiment of the present invention will be described with reference to FIG. 1, and the control determination processing unit for earthquake control will be described with reference to FIG.

  In FIG. 1, in the elevator hoistway 11 of the building 13, the car 1 moves up and down along a guide rail (not shown), while the counterweight 2 moves up and down along the guide rail (not shown). Has been. The car 1 and the counterweight 2 are suspended by the main rope 6 and are driven by the hoisting machine 4 in the machine room 10. In the machine room 10, a control panel 3, a governor 5 and an earthquake detector 9 are arranged, and a governor rope 7 is wound around the governor 5. Furthermore, in order to reduce the weight change between the car 1 and the main rope 6 on the counterweight 2 side, a compen- sion rope 8 is installed.

  A method of controlling the control operation under the above configuration will be described with reference to FIG. First, the detection signal of the earthquake detector 9 installed at the upper part of the hoistway 11 as a vibration sensor is sent to the control determination processing unit 14. The control determination processing unit 14 includes high-pass filters 15, 16, and 17 that remove the acceleration component of gravity and the DC drift component of the acceleration sensor from the acceleration detection signals in the x, y, and z directions of the earthquake detector 9, and these A calculation unit 21 that performs a predetermined calculation using the signals 18, 19, and 20 that have passed through the filter, and a threshold determination unit that determines a plurality of levels of shaking of the building 13 from the output signal (determination value) of the calculation unit 21 22, and a signal from the threshold determination unit 22 is sent to the control panel 3. Here, the control determination processing unit 14 may be in the unit case of the earthquake detector 9 or in the control panel 3. Further, the earthquake sensor 9 can be configured even if a speed sensor is used instead of the acceleration sensor.

  Further, the calculation unit 21 performs a calculation for combining the accelerations of the x, y, and z components. As a synthesis method thereof, an operation for adding a predetermined coefficient to each absolute value of each component (Equation 1), an operation for adding a predetermined coefficient to each square value of each component (Equation 2), An operation (Equation 3) that further performs square root processing on the operation result of Equation 2), an operation (Equation 4) that performs a p-root operation on a value obtained by adding a predetermined coefficient to the p-th power of the absolute value of each component. Conceivable.

  Here, in determining the weighting factors α, β, and γ to be introduced into the observation values, the influence of noise can be suppressed to a minimum by taking into account the characteristics of acceleration noise due to the installation environment of the building 13 and the equipment in the building 13. . Further, the coefficient α and the coefficient β may be weighted to different values depending on the shape of the horizontal section of the building 13. For example, in the case of a building 13 having a horizontal cross section that is sufficiently longer in the x direction than in the y direction, the building 13 is less likely to shake in the x direction, so that it is preferable to add a weight.

  Then, the determination value synthesized by the calculation unit 21 is sent to the threshold value determination unit 22, and the control operation is controlled according to the flow shown in FIG. As main control modes in the present embodiment, a normal operation mode, a standby control operation mode in which the car 1 being lifted and lowered is temporarily stopped to the nearest floor to open the door and the car 1 being stopped is opened, and This is a building shake control operation mode that shuts down and stops operation. Hereinafter, a specific processing method will be described with reference to FIG.

  The threshold determination unit 22 first compares the determination value calculated by the calculation unit 21 with the first threshold L1 (step 30). If the determination value is equal to or greater than the first threshold L1, the elevator is normally Switch from the operation mode to the standby control operation mode, and proceed to the next step. Here, the first threshold value L1 is a value within a range of 2 Gal or more and 5 Gal or less for a building 13 having a height of 60 m or less, and a value within a range of 0.5 Gal or more and 2.5 Gal or less for a building exceeding 60 height. Set each. In calculating the determination value, the above (Equation 3) is adopted, and the weighting coefficients α, β, and γ are all set to 1 for simplicity.

  Next, when the shaking of the building 13 is detected, it is determined whether or not the elevator is moving up and down (step 31). If the elevator is moving up and down, the car 1 is stopped at the nearest floor (step 32) and the door is opened (step 33). If the elevator is not running, that is, if the elevator is stopped, the door opens on that floor. In addition, the display of the destination floor that has already been registered when the shaking of the building 13 is detected is maintained, and the door open state and the display of the destination floor are displayed until a predetermined time T1 elapses after the shaking of the building 13 is detected. The state is maintained (step 34). Further, until the predetermined time T1 elapses, a display or voice guidance for the standby control operation mode, for example, a voice such as “An earthquake has occurred. Shaking is being confirmed.” Is alleviated. Means may be incorporated. Even during the standby control operation mode, it is possible to register a new call from the car 1 or from the landing.

  Then, whether or not the determination value when the predetermined time T1 has elapsed from the time when the shaking of the building 13 is sensed, that is, the determination value becomes equal to or higher than the first threshold L1, is equal to or less than the second threshold L2. Determination is made (step 35). Note that the determination value to be compared with the second threshold L2 is not only the determination value at the moment when the predetermined time T1 has elapsed, but also the determination value within a certain time before that time when the predetermined time T1 has elapsed. The largest of these is used. The specific time here is specifically about 1 second or more and 10 seconds or less, and is a time corresponding to the natural period of shaking of the building 13. In addition, as the second threshold L2, a value within the range of 2 Gal or more and 5 Gal or less is set.

  Further, the predetermined time T1 is set in consideration of the time necessary for determining whether the vibration detected in step 30 is a vibration to be switched to the building vibration control operation mode. Specifically, the predetermined time T1 is set to about 10 to 20 seconds, whether or not the earthquake moves so weak as not to cause earthquake damage to the elevator, or disturbance vibrations such as traffic equipment around the building 13 and facilities such as air conditioners It is possible to determine whether it is due to noise vibration of the device.

  In step 35, if the judgment value is equal to or smaller than the second threshold L2, it is considered that the earthquake motion is weak or noise vibration, the standby control operation mode is canceled and the operation mode is switched to the normal operation mode. To normal operation (step 43). On the other hand, if the judgment value exceeds the second threshold value L2 in step 35, it is regarded as a shake that may cause earthquake damage, and the standby control operation mode is switched to the building shake control operation mode, and the car 1 is stopped. To continue. Therefore, first, the passengers in the car 1 are notified that the earthquake has occurred and that the building control mode is in operation, and voice guidance is provided to move the car 1 out of the car 1. Prompt (step 36). At this time, the registration of the destination floor that has already been registered is canceled, and after that, the door is kept open while waiting.

  Further, after the predetermined display and voice guidance in step 35 is performed, the system waits for a predetermined time T2 (step 37), and then closes the door (step 38). Here, the predetermined time T2 is the minimum time required for the passenger to go out of the car 1 after the predetermined display and voice guidance are performed, and is, for example, about 15 seconds to 20 seconds.

  Then, when the door is closed in step 38, it is determined whether or not an operation for opening the door, such as pressing an opening button in the car 1, has been performed (step 39). If there is an operation to open the door when the door is closed, it is assumed that the passenger is still in the car 1 (step 40), and a predetermined time T4 has elapsed since the door was opened. Then, the door is closed again (step 38). This predetermined time T4 is the minimum time required for the passenger to go out of the car 1 after the door is opened. For example, the predetermined time T4 is about 15 to 20 seconds.

  If the operation for opening the door is not performed in step 39, it is determined that there is no passenger in the car 1, and it is determined whether or not the determination value is equal to or smaller than the third threshold L3 (step 41). Note that the determination value to be compared with the third threshold L3 is not only the determination value at the moment of determination, but also the maximum of the determination values within a certain time before the determination. Specifically, the certain time here is about 1 second or more and 10 seconds or less, and corresponds to the natural period of the shaking of the building 13. Further, as the third threshold L3, a value within a range of 2 Gal or more and 5 Gal or less is set.

  If it is less than or equal to the third threshold L3, it is considered that the shaking of the building 13 has subsided, and after waiting for a predetermined time T3, the display or voice guidance for the building shaking control operation mode is stopped and the operation is resumed. Preparation is performed (step 42), and the elevator is finally returned to normal operation, and the normal operation mode is set (step 43). The reason why the normal operation is not immediately restored even when the value is equal to or less than the third threshold value L3 is that there is a possibility that the swing of the main rope 6 or the like does not stop even if the swing of the building 13 stops. It is. Therefore, in the present embodiment, it is assumed that the decay time of shaking of the long object is about 30 seconds to 60 seconds, and this is set as the predetermined time T3.

  On the other hand, if the determination value is not equal to or smaller than the third threshold value in step 41, the car 1 is kept on standby as it is because the shaking of the building 13 has not stopped, and the operation is stopped. After that, when the shaking of the building 13 is settled, after the determination value becomes equal to or less than the third threshold value, the normal operation is returned after the predetermined time T3 has passed, as described above.

  As described above, in this embodiment, the standby control operation mode is started by detecting even a small fluctuation without distinguishing between a P wave mainly composed of a longitudinal wave and an S wave mainly composed of a transverse wave. , I have stopped at the nearest floor as soon as possible. In addition, after switching from the standby control operation mode to the building shake control operation mode, the swing is appropriately detected, and when the shake of the building 13 is converged, the control is quickly returned to the normal operation.

  In addition, the present embodiment also introduces a so-called S-wave control operation that prevents a normal operation from being restored until inspection by a maintenance staff or the like is performed when a greater shaking is detected. In the S wave control operation of the present embodiment, for example, a threshold value L4 (for example, 10 Gal or more and 40 Gal or less) larger than the threshold value (L1, L2, L3) is set, and the horizontal acceleration value exceeds the threshold value L4. In such a case, stop operation and wait for inspection by maintenance personnel. This S-wave control operation can be performed using the earthquake detector 9, but an S-wave detector may be separately provided in the lower part of the hoistway 11, the lower part of the building 13, or the like. In the S-wave control operation, the threshold value L4 may be compared using a combined value of the vertical direction and the horizontal direction instead of the horizontal acceleration value.

  Next, effects of the present embodiment will be described.

  First, since a smaller threshold is used than in the prior art, the shaking of the building 13 can be sensed with high sensitivity. Moreover, since the acceleration in the vertical direction and the horizontal direction are used and the standby acceleration is synthesized and compared with the threshold value, the start of the standby control operation is determined using only the acceleration in the vertical direction. Compared with the conventional P-wave control operation, the shaking of the building 13 can be sensed with high sensitivity. That is, it is possible to omit the time required to determine whether or not the shaking of the building 13 is a problem such as noise, and to start the standby control operation at an early stage.

  Furthermore, in this embodiment, even after switching to the building shaking control operation, the convergence state of the building 13 is monitored to determine whether or not the building shaking control operation needs to be continued. Regardless of the conventional method, unlike the conventional method of waiting for about 1 minute, unnecessary control operation can be suppressed and it is possible to quickly return to normal operation.

  Also, at the stage where the shaking of the building 13 is detected at step 30, the destination floor registration is not canceled and the earthquake occurrence guidance is not performed. Since it is performed at the stage of switching to the control operation mode, unnecessary confusion and anxiety for passengers can be prevented.

  In the control shown in FIG. 3 in the present embodiment, not only the standby control operation is started by detecting the shaking of the building 13 caused by the P wave, but the shaking of the building 13 caused by the P wave is extremely small and cannot be sensed. In this case, it is possible to start the standby control operation by sensing the shaking of the building 13 caused by the S wave coming after the P wave. In the case of an earthquake with a strong short distance, since the acceleration when the S wave arrives is large, it is possible to start the S wave control operation by detecting the S wave sensor.

  Here, in the long-period ground motion that is likely to occur when an earthquake with a far epicenter propagates to the plain with the sedimentary layer, the acceleration observed in the building 13 is small even when the S wave arrives. May not be detected. This long-period ground motion causes the swing of the ropes to grow as the building 13 continues to shake for several minutes with low acceleration even when the swing of the ropes is small when the S wave arrives. It is known that there is a possibility of giving or causing damage to ropes.

  However, unlike the conventional S-wave control operation, the control shown in FIG. 3 of the present embodiment can accurately detect low fluctuations and appropriately determines whether or not to continue the control operation. Even in such a case, it is possible to start the control operation before the ropes start to sway and to wait for the elevator until the ropes sway.

  Note that the threshold values L1, L2, and L3 described above are determined according to the size and weight of the foundation of the building 13, and L1 = L2 = L3 may be considered depending on conditions.

  Further, in this embodiment, the standby control operation is started when the determination value obtained via the vibration sensor becomes equal to or higher than the first threshold L1, but becomes the same value as the first threshold L1. The standby control operation may be started only when the first threshold value L1 is exceeded without starting the standby control operation. The same applies to the second threshold L2 and the third L3.

  Further, in the elevator configuration diagram of FIG. 1, the earthquake detector 9 is installed in the machine room 10, but in the case of an elevator without the machine room 10, it is installed in the hoistway 11 or the upper part of the building 13. You may do it. If the seismic detector 9 is installed above the building 13 in this way, the magnitude of the shaking of the building 13 due to the earthquake is amplified. It can be perceived.

  Further, since the vibration in step 35 is mainly considered to be an S wave, the object to be compared with the second threshold value L2 is not a composite value obtained by synthesizing accelerations in three axial directions orthogonal to each other. The acceleration value in the direction may be used. The same applies to the comparison target with the third threshold value L3 in step 42.

  It should be noted that the control operation of this embodiment can also be applied to cases where the building 13 is shaken by strong winds other than earthquakes.

It is a figure which shows the structure of the elevator to which the Example of this invention is applied. It is a figure which shows the structure of the control determination process part in connection with this invention. It is a figure which shows the flow of control of the control operation in connection with this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car 2 Balance weight 3 Control panel 4 Hoisting machine 5 Governor 6 Main rope 7 Governor rope 8 Compen rope 9 Earthquake detector 10 Machine room 11 Hoistway 12 Pit 13 Building
14 Control determination processing units 15, 16, and 17 High-pass filters 18, 19, and 20 Signal 21 Calculation unit 22 Threshold determination unit

Claims (9)

In an elevator device that installs a vibration sensor that detects the vibration of the building in the building including the elevator hoistway, and uses this vibration sensor to perform building swing control operation during earthquakes and strong winds,
Normal operation mode, standby control operation mode in which the moving car is temporarily stopped to the nearest floor and the door is opened and the stopped car is opened, and building swing control operation mode in which the door is closed and the operation is stopped Have
When the determination value obtained via the vibration sensor is equal to or greater than a first threshold, the elevator is switched from the normal operation mode to the standby control operation mode, and the predetermined value is determined from when the threshold is equal to or greater than the first threshold. When the time elapses, the elevator is moved from the standby control operation mode to the normal operation mode when the maximum of the determination values within a certain time before the predetermined time elapses is equal to or less than a second threshold value. When the second threshold is exceeded, the elevator is switched from the standby control operation mode to the building shake control operation mode ,
The elevator apparatus characterized in that the predetermined time is a time corresponding to a natural period of shaking of the building .   The elevator apparatus according to claim 1, wherein after switching to the building swing control operation mode, the mode is switched to the normal operation mode when the determination value becomes equal to or less than a third threshold value.   The elevator apparatus according to claim 1, wherein the vibration sensor is an acceleration sensor that measures accelerations in three axial directions orthogonal to each other, and a combination of accelerations in the respective axial directions is used as the determination value.   The elevator apparatus according to claim 1, wherein the destination floor registration is deleted when the second threshold value is exceeded.   The elevator apparatus according to claim 1, wherein when the determination value is equal to or greater than the first threshold value, the standby control operation mode display or voice guidance is performed to notify a passenger. The elevator apparatus according to claim 1, wherein when the determination value is equal to or greater than the second threshold value, the building swing control operation mode display or voice guidance is performed to notify a passenger.   3. The elevator apparatus according to claim 1, wherein each of the threshold values is a value of 5 Gal or less.   The elevator apparatus according to claim 1, wherein the predetermined time is 10 seconds or more and 20 seconds or less. In an elevator device that installs an acceleration sensor to detect building vibration in the building including the elevator hoistway, and uses this acceleration sensor to perform building shake control operation during earthquakes and strong winds,
When the acceleration sensor detects vertical and horizontal accelerations, and the judgment value calculated using the vertical and horizontal accelerations is equal to or higher than the first threshold, the moving car is at the nearest floor. The car that is stopped and opened and the car that is stopped is controlled to be opened, and when a predetermined time has elapsed from the time when the first threshold value or more is reached, within a certain time before the time when the predetermined time has elapsed. When the maximum judgment value among the judgment values is less than or equal to the second threshold value, the normal operation is restored, and when the judgment value exceeds the second threshold value, the door is closed and the operation is stopped .
The elevator apparatus characterized in that the predetermined time is a time corresponding to a natural period of shaking of the building .

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