JP2011105412A - Elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevator improved in safety by urgently stopping before the car comes out of guide rails by an earthquake beyond a strong earthquake of intensity 5 upper and holding the guide rails by an electromagnetic emergency stopper to reliably prevent the car from falling. <P>SOLUTION: This elevator includes a hoistway, the guide rails vertically installed in the hoistway, the car vertically moving in the hoistway along the guide rails, the electromagnetic emergency stopper which is installed in the car, holds the guide rails, and fixes the car to the guide rails, and an earthquake sensor capable of sensing earthquakes for each intensity and/or an emergency earthquake advance report receiver for receiving an earthquake advance report from the outside of the elevator. The elevator further includes a control unit for controllably fixing the car to the guide rails by the electromagnetic emergency stopper after the car is stopped at the nearest story based on the determination of sensing of earthquake for each intensity by the earthquake sensor or the emergency earthquake advance report receiver, or controllably urgently stopping the car by the electromagnetic emergency stopper immediately after the determination of sensing of earthquake. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an elevator, and more particularly, to an elevator having a configuration for stopping a car from falling when an earthquake exceeding a strong earthquake occurs.

  In Japan, due to the Building Standards Act, the emergency stop of the elevator car should not exceed 1.4 times the rated speed in the event of a motor brake failure or main rope cut. The speed control rope works with a mechanical emergency stop to grab the guide rail to stop the fall.

  However, when a strong earthquake such as seismic intensity 5 of the Miyagi-oki earthquake and seismic intensity 7 of the Hyogoken-Nanbu earthquake is exceeded, the governor rope (governor rope) is not only the main rope, but also the governor rope due to the large shaking of the “direct type” earthquake. There was also a case where it could come off the sheave. In such a state, the mechanical emergency stop cannot be operated, and in the unlikely event that the car falls in such a state, there is a possibility that the car cannot be prevented from dropping. In addition, even if the governor rope does not come off, if the car comes off the guide rail due to a large shake, the mechanical emergency stop becomes inoperable, and the car falls in such a situation. If this happens, it may still be impossible to stop the fall.

  Patent Document 1 includes an electromagnetic safety brake using an electromagnet as an elevator safety brake that operates when the main rope breaks, when the tension of the main rope relaxes, or when the car exceeds a predetermined speed. An elevator is disclosed. Patent Document 2 discloses a governor low-press emergency stop system that can reliably stop a car with a governor when an abnormal situation occurs when the car travels.

  Patent Document 3 includes a seismic detection device and a derailing prevention device that prevents derailment, and the seismic detection device uses the seismic detection input signal to prevent the derailment by gripping the protruding piece of the guide rail. An elevator apparatus is disclosed. Patent Document 4 discloses an elevator that can prevent malfunction of rail release prevention control by providing a lock device that causes the rail release detection device to function only when the seismic sensor detects a seismic intensity equal to or greater than a set value. An apparatus is disclosed.

JP 2002-532366 A Japanese Patent No. 3390578 JP-A-9-202558 Japanese Patent Publication No. 61-17748

  However, the elevators disclosed in Patent Documents 1 and 2 detect an overspeed state of the car and operate when the speed exceeds a threshold level, which is large when a strong earthquake occurs. The car may be disengaged from the guide rail due to the shaking, and the emergency stop may be disabled before detecting the overspeed condition, and the car may not be prevented from falling.

  In addition, in the elevator apparatus disclosed in Patent Documents 3 and 4, when a shake due to an earthquake is detected, the operation of the car is stopped and then the electromagnetic derailment prevention device is operated to stop the car in the stopped state. Prevents rail removal. That is, the elevator apparatuses of Patent Documents 3 and 4 stop the operation of the car by a control device that controls the operation of the elevator, and prevent the stopped car from being derailed. It does not stop the car in an emergency. Therefore, when the main rope or the governor rope is cut due to the occurrence of an earthquake exceeding seismic intensity 5 or higher, it is not considered to safety catch the traveling car.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an elevator that reliably stops the falling of a car based on seismic intensity level detection determination in order to solve the above problems.

  In order to achieve the above object, an elevator according to the present invention includes a hoistway, a guide rail standing in the hoistway, a car moving up and down in the hoistway along the guide rail, and the car An electromagnetic emergency stop device that is provided and fixes the car to the guide rail across the guide rail, an earthquake detector that can be detected by seismic intensity level, and / or an emergency earthquake early warning receiver that receives earthquake early warning from the outside of the elevator, The elevator is provided with an electromagnetic emergency stop device after stopping the car at the nearest floor based on seismic intensity graded seismic detection judgment by the earthquake detector or the earthquake early warning receiver. Provided with a control device that performs control to fix to the rail, or control to emergency stop the car with the electromagnetic emergency stop immediately after earthquake detection judgment And features.

  According to the present invention, an emergency stop is made before the car is released from the guide rail due to an earthquake, the guide rail is sandwiched by an electromagnetic emergency stop device, and the fall of the car is surely stopped, thereby improving the safety of the elevator. Can do.

It is the schematic which shows the structure of the elevator which concerns on this invention. FIG. 2 is a plan view of the electromagnetic emergency stop device 3 taken along the line 2A-2A in FIG. It is an operation | movement flowchart at the time of the earthquake occurrence of the elevator of FIG.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the accompanying drawings.

  FIG. 1 is a schematic diagram illustrating the overall configuration of the elevator according to the present embodiment. As shown in FIG. 1, the elevator apparatus includes a hoistway 21, a guide rail 1 erected in the hoistway 21, a car 2 that moves up and down in the hoistway 21 along the guide rail 1, and a counterweight. 22. The counterweight 22 and the counterweight 22 are suspended from each other via a sheave 9 and a hoisting machine sheave 10 provided in a machine room 23 above the hoistway 21, and one of them is driven by the hoisting machine 11. Ascend, the other descends.

  In the upper part of the car 2, there is an appliance box 17 in which an electromagnetic emergency stop 3 for fixing the passenger car 2 to the guide rail 1 and a control device for instructing the electromagnetic emergency stop 3 to operate are stored. Provided. The instrument box 17 is connected to a control device (control panel) 12 disposed in the machine room 23 via a moving cable 18 for transmitting an operation command.

  The control device 12 includes a microcomputer in the control panel for instructing the operation of the hoisting machine 11 and the electromagnetic emergency stop device 3, and a central operation for instructing an elevator control process (see an operation flowchart of FIG. 3 described later) when an earthquake occurs. The processing apparatus 13 and an automatic notification device (not shown) for notifying the outside of an operation stop due to an earthquake or the like are provided.

  A P-wave seismic detector 19 for detecting an earthquake with a seismic intensity of 2 or less is installed at an elevation level above the elevator, and an S-wave extra low seismic detector 16 for detecting an earthquake with a seismic intensity of 3 to 4 is installed in the machine room 23. And an S-wave low earthquake detector 15 that detects an earthquake with a seismic intensity of 5 and an S-wave high earthquake detector 14 that detects an earthquake with a seismic intensity exceeding 5 are installed. Further, the earthquake early warning receiver 8 is connected to the control device 12. The earthquake early warning receiver 8 receives an earthquake early warning signal (a signal including information such as seismic intensity scale) from the meteorological agency 4 through the Internet 6 or satellite communication 7 by the distributor 5.

  FIG. 2 is a diagram showing a configuration of the electromagnetic emergency stop device 3. As shown in FIG. 2, the electromagnetic safety device 3 includes a pair of arms 32 held by a screw spring 33 fixed to a main body 36 with screws 34. At the tips of the pair of arms 32, a braking brake element (wedge) 31 for gripping the guide rail 1 facing each other is provided. The main body 36 incorporates an electromagnet 35 that is energized by an operation command of the microcomputer 12.

  The electromagnetic emergency stop device 3 is held in a state where the arm 32 is opened by the elastic force of the screw spring 34 in a normal state. In an emergency such as an earthquake, when the electromagnet 35 is energized by the operation command of the microcomputer 12, the arm 32 is closed by the magnetic attractive force of the electromagnet 35, and the stopping brake 31 is pressed against the guide rail 1 to grip the guide rail 1. To do. When the electromagnetic emergency stop device 3 grips the guide rail 1, the car 2 is fixed to the guide rail 1.

The control procedure of the elevator at the time of earthquake occurrence is demonstrated based on FIG. FIG. 3 is a flowchart of the elevator control processing program stored in the microcomputer 12.
As shown in FIG. 3, even if an earthquake occurs, the earthquake early warning receiver 8 does not receive the earthquake early warning signal (step 301 → N), and the P-wave earthquake detector 19 does not operate (step 302 → N). ) Or when the S-wave extra low earthquake detector 16 does not operate (step 303 → N), there is almost no shaking due to the earthquake, and the elevator continues normal operation.

  When the earthquake early warning receiver 8 receives the earthquake early warning signal (step 301 → Y), or when the P-wave earthquake detector 19 or the S-wave extra low earthquake detector 16 operates (step 302 → Y, step 303). → Y), and if the S-wave low sensor 15 does not operate (step 304 → N), the seismic intensity is 4 or less. At this time, the control device 12 confirms whether the car 2 is traveling (step 311). If the car 2 is running, the car 2 is stopped to the nearest floor (step 312). After the car 2 is stopped to the nearest floor, the electromagnetic emergency stop 3 is operated to fix the car 2 to the guide rail 1 (step 313: emergency stop measure). This step stops the car 2 as a way to prevent the car from falling against the next earthquake. After emergency stop of the car 2, the door is closed for about 15 seconds (step 314), and then the door is fully opened for about 60 seconds (steps 315 and 316). The stopper 3 is released (step 317) and returned to normal operation.

  In addition, when the S wave low earthquake detector 15 operates (step 304 → Y) and the S wave high earthquake detector 14 does not operate (step 305 → N), that is, the earthquake detectors 14 to 16 detect the seismic intensity level 5. If it is determined, the control device 12 stops the car 2 at the nearest floor (step 321) and operates the electromagnetic emergency stop 3 to make an emergency stop (step 322). After the emergency stop of the car 2, the door is fully opened (step 323), and about 15 seconds later, the door is closed and the operation is stopped (steps 324 to 325). After the stop of operation, the automatic notification device notifies the outside that the elevator has stopped operating (step 326).

  When the S wave high earthquake sensor 14 is operated, that is, when a seismic intensity level exceeding 5 is detected (step 305 → Y), an electromagnetic emergency is performed regardless of whether the car 2 is running or stopped. The stop device 3 is operated to emergency stop the car 2 (step 331), and then the operation is stopped (step 332). After the stop of operation, the automatic notification device notifies the outside that the elevator has stopped operating (step 333).

  According to the elevator of this embodiment, even if it does not detect the overspeed state of the car 2 using the governor, it is based on the signal transmitted from the earthquake detectors 14-16, 19 or the emergency earthquake warning receiver 8. Deciding whether to make an emergency stop, before the car 2 is detached from the guide rail 1, the car 2 is fixed to the guide rail 1 to make an emergency stop. Can be reliably prevented, and the safety of the elevator can be improved.

  Further, for example, when the seismic intensity detectors 2 to 4 or the seismic intensity levels 3 to 4 or the seismic intensity level 5 is detected or received by the earthquake detectors 14 to 16 or 19 or the earthquake early warning receiver 8, FIG. By performing the control for continuing the normal operation and the control for stopping the operation of the elevator described in the above, it is possible to perform an appropriate elevator operation for the seismic intensity.

  The present invention is not limited to the above-described embodiment, and various other ones are assumed. For example, in the elevator shown in FIG. 1, the hoisting machine 11, the control device 12, and the earthquake sensors 14 to 16 are installed in the machine room 23, but these devices may be installed in the hoistway 21. Good.

  In the present embodiment, as shown in FIG. 1 and FIG. 3, the aspect in which the earthquake detectors 14 to 16 and 19 that detect an earthquake for each earthquake floor and the emergency earthquake early warning receiver 8 are described together. The invention can be realized even if any one of the earthquake detectors 14 to 16 and 19 or the earthquake early warning receiver 8 is provided. In this embodiment, the seismic detectors 14 to 16 and 19 that detect the P wave, the S wave extra low, the S wave low and the S wave height are used. ) May be selected as appropriate.

  As described above, according to the present embodiment, the electromagnetic emergency stop is based on the seismic intensity level detection determination, not the mechanical emergency stop by the conventional governor rope that is inoperable when a strong earthquake is exceeded. We can provide an elevator that grips the guide rails to stop the car and stops the car from falling down, and stops the car before it comes off from the guide rail due to an earthquake exceeding a strong earthquake with a seismic intensity greater than 5. The guide rail is sandwiched by the emergency stop device, so that the car can be securely prevented from falling and the safety of the elevator can be improved.

  The present invention allows the guide rail 2 to act as a mechanical emergency stop with a governor rope and governor before exceeding 1.4 times the rated speed of the car 2 (as defined by the Building Standards Act). It may be used in combination with one that holds the car 2 and stops the car 2 from falling.

DESCRIPTION OF SYMBOLS 1 Guide rail 2 Car 3 Electromagnetic emergency stop 8 Emergency earthquake early warning receiver 12 Control device 14 S wave high earthquake detector 15 S wave low earthquake detector 16 S wave specific earthquake detector 19 P wave earthquake detector

Claims (5)

A hoistway, a guide rail erected in the hoistway, a car that moves up and down in the hoistway along the guide rail, and a car that is provided on the car and sandwiches the guide rail. In an elevator equipped with an electromagnetic emergency stop to be fixed to a seismic detector and an earthquake early warning receiver that receives earthquake early warning from the outside of the elevator
Based on the seismic detection judgment by seismic intensity level by the earthquake detector or the earthquake early warning receiver, after the car is stopped at the nearest floor, the electromagnetic emergency stop device fixes the guide rail to the guide rail, Alternatively, the elevator includes a control device that performs control to emergency stop the car by the electromagnetic emergency stop immediately after the earthquake detection determination.   The elevator according to claim 1, further comprising an automatic charging capacitor, wherein the electromagnetic emergency stop device can be operated by the automatic charging capacitor when power is purchased or a power failure occurs due to an earthquake. The elevator according to claim 1, wherein the seismic detector is a P-wave seismic detector that senses minor earthquakes of seismic intensity level 1 or light earthquakes of seismic intensity level 2, weak earthquakes of seismic intensity level 3 or middle earthquakes of seismic intensity level 4 or less. Consisting of at least one of the S wave extra low earthquake sensor that senses the earthquake of S, and the S wave low or S wave high earthquake sensor with a strong earthquake of seismic intensity 5
After stopping the car to the nearest floor when detecting the detection of P wave or S wave extra low in the seismic intensity level 2 by detecting the seismic detector or emergency earthquake warning receiver when an earthquake occurs , With a guide rail sandwiched by an electromagnetic emergency stop device, return to normal operation after a lapse of a predetermined period of time, and when seismic intensity level 5 senses the detection of a strong S wave low or S wave high, the operation is stopped and electromagnetic An elevator characterized by an emergency stop that automatically stops the car by sandwiching the guide rails with an emergency stop.   The elevator according to any one of claims 1 to 3, wherein the elevator is automatically notified to the outside by an automatic reporter after an emergency stop.   5. The elevator according to claim 4, wherein the automatic alarm stops at the nearest floor when detecting a seismic intensity floor of a minor earthquake of seismic intensity level 1, a minor earthquake of seismic intensity level 2, a weak earthquake of seismic intensity level 3, or a middle earthquake of seismic intensity level 4. If normal operation is resumed after a certain period of time, automatic notification will not be sent to the outside, and a strong earthquake at seismic intensity 5 or a seismic intensity 6 at seismic intensity 6 or a strong earthquake at seismic intensity 7 will be automatically notified to the outside. elevator.

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