JP4350986B2 - Elevator abnormality detection method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for detecting a fall of a member or a part attached to an elevator or a hook of a rope when vibration is caused by an earthquake or a strong wind.
[0002]
[Prior art]
The elevators installed in the building are automatically controlled by seismic control to prevent the occurrence of primary disasters due to earthquakes when they feel a certain level of shaking. It is necessary to make sure that there is no danger to avoid a natural disaster.
[0003]
For example, there is a risk of inducing a secondary disaster, such as a fall due to vibrations of various devices attached to an elevator car, etc., and there are quite a few cases that occur in survey reports after the Great Hanshin Earthquake.
[0004]
Another danger is that the rope connected to the elevator car may be caught by another object due to vibration. This is also the case that was often reported in survey reports after the Great Hanshin Earthquake, and there are many cases where governor ropes and compen- sion ropes with little tension are caught on equipment in the hoistway (for example, guide rail support brackets and landing devices). . In particular, increasing the number of buildings will increase the natural vibration period of the building itself, increasing the amplitude of these ropes having a relatively long period and increasing the possibility of catching. In such high-rise buildings, ropes tend to resonate even during strong winds, and the possibility of catching tends to increase in the same way as during an earthquake.
[0005]
In order to detect the fall of the device and the hook of the rope, conventionally, for example, a part actually dropped by a direct work after an earthquake by a manual operation such as an inspector or a rope actually caught is confirmed.
[0006]
This kind of direct confirmation work, especially in high-rise buildings, can be difficult for the inspector to reach the elevator machine room installed at the top of the building. It takes effort. For this reason, when high-rise buildings are always inhabited by people, ensure the safety of people who are difficult to evacuate without an elevator even after an earthquake, especially elderly people, children, or the sick. Is difficult.
[0007]
As a means for detecting the hooking of the rope, there is a conventional automatic detection method, for example, a method of detecting this by utilizing that the displacement of the tensioner of the governor rope becomes an abnormal value due to the hooking of the rope (for example, (See Patent Documents 1 and 2), a method of detecting a change in rope length when a governor rope is vibrated with a vibrator (see, for example, Patent Document 3), and the magnitude of the swing of the governor rope is evaluated and compared with that. And a method of detecting a catch when a falling member passed through a governor rope is dropped and cannot be detected (for example, see Patent Document 5).
[0008]
[Patent Document 1]
JP-A-9-77409 [Patent Document 2]
Japanese Patent Laid-Open No. 10-120327 [Patent Document 3]
JP 2000-255928 A [Patent Document 4]
JP-A-9-290975 [Patent Document 5]
Japanese Patent Laid-Open No. 2001-270666
[Problems to be solved by the invention]
As disclosed in Japanese Patent Application Laid-Open Nos. 9-77409 and 10-120327, the detection method using the fact that the moving displacement of the tensioner of the governor rope becomes an abnormal value is very high in the governor rope itself in a high-rise building. When the length is long, it is difficult to distinguish between a movement displacement due to a temperature change or humidity change and a movement displacement due to a catch, and it is difficult to accurately detect the catch.
[0010]
In addition, the method of detecting the change in the rope length from the amplitude when the governor rope is vibrated with a vibrator as in Japanese Patent Application Laid-Open No. 2000-255828 is also similar to the above in which the change in the rope length due to the temperature change or humidity change is detected. Detection in consideration is difficult.
[0011]
In the method of evaluating the magnitude of the sway of the governor rope and detecting it in comparison with that as in Japanese Patent Laid-Open No. 9-290975, evaluating the magnitude of the sway due to the earthquake or strong wind is a complex sway in high-rise buildings. It is technically difficult because it can occur. In addition, once the hook is generated, the governor rope stops swinging, the vertical acceleration is not generated, and it is difficult to determine that it is normal, and it is difficult to determine the influence on the operation of the elevator.
[0012]
On the other hand, a method of detecting a catch when a falling member passed through a governor rope as in JP-A-2001-270666 is dropped and cannot be detected is a very simple method. When falling from a high place, the falling member may jump, and if a switch is used for the detector, it is difficult to press it accurately. In addition, in order to store the dropping member in a predetermined position of the detector, a pair of rollers through which the rope is inserted is necessary. However, if the gap between the roller and the rope is too wide, the dropping member may jump, and conversely If it is too narrow, it may not fall, so adjustment is difficult and the mechanism of the dropping member becomes complicated. In addition, two detectors directly above the tensioning vehicle in the elevator pit are required, which not only complicates the structure, but also the detector is disposed at a position that is always covered with dust and dirt in the hoistway. There is also a risk of malfunction of the switch. In order to prevent this, maintenance is required. In addition, the falling member is dropped when a predetermined vibration is generated by the earthquake detector, but if the magnitude of the shaking that starts the dropping of the falling member is too small, the falling member will fall at the beginning of the earthquake. , It is not possible to detect the case where the swing becomes larger after being dropped. Moreover, if the magnitude | size of the shake which starts the fall of a dropping member is too large, even if it wants to detect, it cannot drop and cannot detect.
[0013]
The object of the invention to eliminate the disadvantages of the prior art, when the vibration due to earthquake or strong wind is applied to the elevator car, the middle of the rope that is connected to the elevators car in the hoistway equipment (e.g. a guide rail It is an object of the present invention to provide an elevator abnormality detection method that can automatically and reliably detect an object when it is caught on a support bracket or a landing device, and that can easily and easily install a device therefor.
[0014]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the invention according to claim 1 is characterized in that a dropping member attached with a wireless tag is attached to a rope connected to an elevator so that it can be dropped, and the rope is placed near the bottom of the rope. A reading device that captures radio waves transmitted from the wireless tag is installed, and when a rope catch is detected after occurrence of vibration such as an earthquake or strong wind, the falling member is dropped, and it is detected that the radio waves are not captured by the reading device. It is characterized by detecting the hook of the rope.
[0015]
According to the first aspect of the present invention, when the dropping member attached with the wireless tag attached to the rope is dropped after the occurrence of vibration due to an earthquake or strong wind, the dropping member falls along the rope. In this case, since the reader is arranged near the bottom of the rope, the RFID tag attached to the dropping member falls to the bottom of the rope without any trouble along the rope. In this case, the radio wave transmitted from the wireless tag in response to the radio wave transmitted from the reading device toward the wireless tag is detected by the reading device, so that it is immediately determined that there is no catch in the middle of the rope.
[0016]
On the other hand, if the middle of the rope is caught by equipment in the hoistway, such as a guide rail support bracket or landing device, the RFID tag that falls along the rope will be caught by this guide rail support bracket or landing device and fall further. Therefore, the reading device disposed at the lowest position of the rope does not capture the radio wave transmitted from the wireless tag. Therefore, when vibrations due to earthquakes or strong winds are applied to the ropes connected to the elevator, the ropes are greatly shaken by these vibrations, and the middle of the ropes are installed in the equipment in the hoistway (for example, guide rail support brackets and landing floors). Even when caught by a device), when using a simple configuration that simply installs a RFID tag reader and attaches a dropping member that can be dropped by attaching a wireless tag in this way, when detecting Since it is possible to automatically determine that the rope is not caught by detecting the falling member attached with the dropped wireless tag, a direct check operation by a special inspector is not required. Therefore, a building manager or a remote monitoring system can quickly restore an elevator after an earthquake, regardless of an inspector.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory diagram showing an embodiment of an elevator abnormality detection method according to the present invention, which is a case in which a catch in the middle of a governor rope or a compen- sion rope connected to the elevator car 1 is detected. The governor rope is arranged to directly detect an abnormal speed of the elevator and to make an emergency stop. The governor rope is looped between the governor sheave 12 in the machine room and the tensioning wheel 13 in the elevator pit 2, and is installed in the elevator car. The connection member 14 is connected.
[0018]
This governor rope is a single rope as a whole, but if this is sectioned into freely oscillating parts, the free rope part 11a between the governor sheave 12 and the elevator car 1, the elevator car 1 and the tensioning car 13 The free rope portion 11b between the two and the free rope portion 11c between the governor sheave 12 and the tensioning wheel 13 is composed of three free rope portions.
[0019]
In the present invention, an annular dropping member 15 to which the wireless tag 4 is attached is attached to each of the three free rope portions 11a to 11c of the governor rope, and the annular dropping member is normally attached to each free rope portion 11a to 11c. It is supported by the support part 16 at a location near the uppermost part.
[0020]
The wireless tag 4 is also referred to as, for example, a wireless automatic recognition IC, an RFID tag, or an IC tag, and can be used for an article inventory management system that can store and rewrite information. The wireless tag itself does not require power, and when it receives radio waves from a reader, which will be described later, it responds by generating electricity within the chip, and the distance between the reader and the wireless tag is several centimeters. It is characterized in that communication can be performed only at a relatively short distance of about a few meters.
[0021]
For example, the support portion 16 is configured by a mechanism that supports the annular drop member 15 by placing it, holds it while holding it, or supports it by magnetic force by adjusting the material of the annular drop member 15. It is connected to the seismic control operation unit 17 provided in the elevator and is configured to be unsupported by a control signal from here, or is unsupported by a control signal from the remote monitoring device 9 Or an instruction is canceled by a control signal from a central monitoring room or a disaster prevention center that performs centralized management of building facilities.
[0022]
A reading device 5 for reading a signal from the wireless tag 4 and its antenna unit 6 are installed at a position near the lowermost portion of each of the free rope portions 11a to 11c.
[0023]
Further, the antenna unit 6 may be arranged in the minimum in consideration of the reach of radio waves in accordance with the arrangement of the member or component 3 that needs to be detected. In this case, as the form of the antenna unit 6, not only a normal antenna but also a leaky coaxial cable can be used. The leaky coaxial cable is provided with an infinite number of slits in the coaxial cable, and since this slit portion has a small antenna function, it is easy to lay in a narrow place such as an elevator shaft. In addition, for example, in the case where detection is performed for the same purpose over a wide range, such as inspection of falling objects on the entire wall surface or floor surface of the elevator pit 2, a single leaky coaxial cable should be within the range. Since it is installed and only one reading device is required, efficient detection is possible. In the case of a tube instead of a cable, a leaky waveguide is used.
[0024]
Next, a method for detecting catching in the middle of the governor rope after occurrence of vibration due to an earthquake or strong wind will be described. The annular drop member 15 to which the wireless tag 4 is attached is held by a support portion 16 at a location near the top of each free rope portion 11a to 11c in a normal state. In this state, a signal from the wireless tag 4 is not received by the reader 5 installed at a location near the lowermost portion of each free rope portion 11a to 11c.
[0025]
For example, when the occurrence of an earthquake or a strong wind is detected and it becomes necessary to detect catching in the middle of the rope, the support of the support unit 16 is released by a control signal from the earthquake control operation device unit 17 or the remote monitoring device 9. The annular drop member 15 falls by its own weight along each rope along the free rope portions 11a to 11c. In this case, if the hook is not generated in the middle of each free rope portion 11a to 11c, the annular dropping member 15 falls to the lowermost portion along the rope with no trouble in the state where the wireless tag 4 is attached, and near the lowermost portion. A signal from the wireless tag 4 is received by the reading device 5 installed. It is determined that there is no occurrence of catching by receiving this signal.
[0026]
On the other hand, if the signal from the wireless tag 4 is not received by the reader 5 even though the support of the support portion 16 is released, a catch occurs in the middle of the free rope portions 11a to 11c and the ring falls. It is determined that the member 15 is stopped at this portion, and the catch is detected.
[0027]
The main rope is stretched between the upper part of the elevator car 1 and the upper part of the weight 19 via a hoisting machine 20 and a sheave 21 in the machine room. When the main rope is divided into freely vibrating parts, The free rope portion 18 a between the hoist 20 and the elevator car 1 and the free rope portion 18 b between the sheave 21 and the weight 19 are configured.
[0028]
As with the governor rope, the main rope is also passed through the annular drop member 15 having the wireless tag 4 attached to the free rope portions 18a and 18b. The annular drop member 15 is normally placed at the top of the free rope portions 18a and 18b. It is supported by the support portion 16 at a close portion.
[0029]
Next, a method for detecting catching in the middle of the main rope after occurrence of vibration due to an earthquake or strong wind will be described. The annular drop member 15 to which the wireless tag 4 is attached is held by a support portion 16 at a location close to the top of each free rope portion 18a, 18b in normal times. In this state, a signal from the wireless tag 4 is not received by the reader 5 installed at a location near the lowermost portion of each free rope portion 18a, 18b.
[0030]
For example, when the occurrence of an earthquake or a strong wind is detected and it becomes necessary to detect catching in the middle of the rope, the support of the support unit 16 is released by a control signal from the earthquake control operation device unit 17 or the remote monitoring device 9. The annular drop member 15 falls by its own weight along each rope along the free rope portions 18a and 18b. In this case, if there is no catch in the middle of each free rope portion 18a, 18b, the annular drop member 15 falls to the bottom without any trouble along the rope with the wireless tag 4 attached, and near the bottom. A signal from the wireless tag 4 is received by the reading device 5 installed. It is determined that there is no occurrence of catching by receiving this signal.
[0031]
On the other hand, if the signal from the wireless tag 4 is not received by the reading device 5 even though the support of the support portion 16 is released, the free rope portions 18a and 18b are caught in the middle of each loop. It is determined that the dropping member 15 is stopped at this portion, and the catch is detected.
[0032]
The compen- sion rope is stretched between the bottom of the elevator car 1 and the bottom of the weight 19 via a tensioning wheel 23. If the compen- sion rope is divided into freely vibrating parts, A compen- sion rope 22a between the vehicle 23 and a compen- sion rope 22b between the tension wheel 23 and the weight 19 is formed.
[0033]
As with the governor rope and the main rope, this compen- sion rope is passed through an annular dropping member 15 having a wireless tag 4 attached to each compen- sion rope 22a, 22b. It is supported by the support portion 16 at a portion close to.
[0034]
Next, a method for detecting catching in the middle of the compen- sion rope after occurrence of vibration due to an earthquake or strong wind will be described. The annular drop member 15 to which the wireless tag 4 is attached is held by a support portion 16 at a location near the top of each compen rope 22a, 22b in normal times. In this state, a signal from the wireless tag 4 is not received by the reading device 5 installed at a location near the lowermost portion of each of the compensation ropes 22a and 22b.
[0035]
For example, when the occurrence of an earthquake or a strong wind is detected and it becomes necessary to detect catching in the middle of the rope, the support of the support unit 16 is released by a control signal from the earthquake control operation device unit 17 or the remote monitoring device 9. The annular dropping member 15 falls by its own weight along the ropes 22a and 22b. In this case, if there is no catch in the middle of each compen- sion rope 22a, 22b, the annular drop member 15 falls to the bottom without any trouble along the rope with the wireless tag 4 attached, and is installed near the bottom. The reader 5 receives the signal from the wireless tag 4. It is determined that there is no occurrence of catching by receiving this signal.
[0036]
On the other hand, if the signal from the wireless tag 4 is not received by the reader 5 even though the support of the support unit 16 is released, a catch occurs in the middle of each compen rope 22a, 22b and the ring falls. It is determined that the member 15 is stopped at this portion, and the catch is detected.
[0037]
If there is no abnormality after the annular dropping member 15 is dropped, it is necessary to immediately perform a trial operation to resume the operation of the elevator, or even if an abnormality is detected, the next time before the operation is resumed Since it is necessary to return to the original location in preparation for the detection of this, it is necessary to make it easy to attach and detach the annular drop member 15 from the rope. In addition, a plurality of annular dropping members 15 may be installed at each position. This is because, if the relationship between the foreshock and the main shock and the aftershock after the main shock are taken into account, there is a possibility that a larger shake may occur after the annular drop member 15 is dropped. For example, it is an example that a hinge portion is provided and configured so that it can be rotated and removed from the rope, and after the lock portion is provided and attached to the rope, it cannot be removed. It is also effective to construct the annular drop member 15 from two or more parts, integrate them with a detachable one such as a bolt, and disassemble them when attaching and detaching. When performing a trial operation for resuming the elevator operation, only the annular dropping member 15 that should be in the tensioning vehicle 13 and the tensioning vehicle 23 in the pit 2 may become an obstacle to the operation. Can be accessed relatively easily, and if the annular drop member 15 is thus easy to attach and detach, the remote monitoring device 9 or the like does not require an inspector with special qualifications. However, the removal work can be promptly performed by a building manager or the like. In addition, for example, the annular drop member 15 that has fallen directly above the tension wheel 13 and the tension wheel 23 in the pit 2 is further provided with a receiving material 24 so that such a removal operation can be omitted and a test operation can be performed. It is also possible. It is also effective to remove it from the rope like a circle of wisdom. Further, the support portion 16 is configured such that, for example, the lock portion is electrically unlocked so that the annular drop member 15 is easily dropped when an earthquake is detected.
[0038]
Further, the reading device 5 requires power supply and needs to be installed in a transmittable range of the wireless tag 4, but only the antenna unit 6 of the reader 5 is placed in an optimal position in the transmittable range of the wireless tag 4. By installing, the installation position of the reader 5 can be adjusted to a range where power can be supplied.
[0039]
Furthermore, the member or component 3 is dropped or the rope is caught by the reader 5 that detects the movement of the wireless tag 4, but the present invention is not limited to this, and the reader 5 receives a signal from the wireless tag 4. It is also possible to detect a fall of a component or a hook of a rope by using another dedicated determination device that obtains information from the reading device 5. Moreover, when the remote monitoring apparatus is installed in the elevator, it can also be judged in a remote place with this apparatus.
[0040]
【The invention's effect】
As described above, according to the invention described in claim 1, when vibration due to an earthquake or strong wind is applied to the rope connected to the elevator, the rope is greatly shaken by the vibration and the middle of the rope is Even if it is caught in equipment in the hoistway (for example, guide rail support brackets or landing devices), the wireless tag reader can be attached by attaching the dropping member that can be dropped by attaching the wireless tag in this way. Using a simple configuration that only installs, it is possible to automatically determine that the rope is not caught by detecting a falling member with a wireless tag that has been dropped when it is detected. No manual confirmation is required. Therefore, even if an earthquake occurs in a large city and many elevators stop and require confirmation by the inspector, it will take a long time before the arrival of the inspector. According to the present invention, a building manager or a remote monitoring system can quickly restore an elevator after an earthquake, without depending on an inspector. In particular, if you know that there is no rope caught, you can prepare to resume operation immediately, so if you are in a building where people always live, the elderly, children, or the sick Thus, it is possible to ensure the safety of people who are difficult to evacuate without an elevator even after an earthquake.
[Brief description of the drawings]
[0041]
FIG. 1 is an explanatory diagram showing an embodiment of an elevator abnormality detection method according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Elevator car 2 Elevator pit 4 Radio tag 5 Reading apparatus 6 Antenna part 9 Remote monitoring apparatus 10 Communication line 11a, 11b, 11c Free rope part 12 Governor sheave 13 Tensioning wheel 14 Connection member 15 Annular dropping member 16 Supporting part 17 Earthquake control operation apparatus Part 18a, 18b Free rope part 19 Weight 20 Winding machine 21 Sheave 22a, 22b Compen rope 23 Tension wheel 24 Receiving material

Claims (1)

  A rope connected to the elevator is attached so that a dropping member attached with a wireless tag can be dropped, and a reading device that captures radio waves transmitted from the wireless tag is disposed near the bottom of the rope, An elevator abnormality detection method comprising: detecting a rope catch by detecting that a radio wave is not captured by the reading device by dropping a dropping member when detecting the rope catch after occurrence of vibration such as a strong wind .

Images