JP2007161403A - Maintenance inspection method of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a maintenance inspection method capable of efficiently and safely performing a maintenance inspection of an elevator after an earthquake occurs. <P>SOLUTION: This method performs the maintenance inspection in a hoistway and a car of the elevator at a job site provided with the elevator. After the earthquake occurs, a worker hastens to a building, and starts the maintenance inspection of the elevator. Afterwards, the worker interrupts the maintenance inspection once by taking into consideration of generation of an aftershock. The worker starts the maintenance inspection of the elevator again, for example, after several days. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a maintenance inspection method for elevators such as elevators and escalators, and more particularly, to a maintenance inspection method for elevators for performing maintenance inspection of the elevators after an earthquake occurs at a site where a plurality of elevators are installed.

  In recent years, elevators have become indispensable as the number of buildings rises. The elevator has an extremely excellent function of moving the user to the destination floor in a short time.

  In addition, since the number of elevator users has increased due to the increase in size and capacity of buildings, many elevators have been installed in one building.

  In order to ensure the safety of many passengers, the elevator has various safety functions. In particular, when an earthquake occurs, so-called control operation is also performed in which the elevator is promptly stopped at the nearest floor and passengers are dismounted.

  In order to operate the elevator once stopped by the earthquake, it is necessary to ensure safety in the hoistway. That is, it is necessary to check and maintain the safety of the rope for hanging the car, the counterweight having the same weight as the car, or the guide rail for guiding the car in the hoistway. Especially at the site where many elevators are installed, it takes a lot of time to complete the maintenance inspection and restore the elevator completely.

  On the other hand, it is necessary to pay attention to aftershocks following the main shock when an earthquake occurs. And if an aftershock occurs during maintenance inspection after the earthquake occurs, there is a risk that the hoistway will be damaged again. For example, if a large aftershock occurs just before the completion of the maintenance inspection, the elevator maintenance inspection must be performed again from the beginning, which substantially doubles the time and labor. This is a major obstacle to the complete restoration of elevators throughout the region. In addition, workers undergoing maintenance and inspection in the hoistway are at risk of being exposed to secondary disasters such as the risk of falling objects due to aftershocks.

  And these problems can be applied not only to elevators but also to maintenance and inspection of elevators in general, such as maintenance and inspection work in escalator trusses.

  Therefore, an object of the present invention is to provide a lifting / lowering maintenance / inspection method capable of efficiently and safely performing maintenance / inspection of an lifting / lowering after an earthquake occurs.

  In order to achieve the above object, in the present invention, in the elevator maintenance inspection method for performing maintenance inspection of the elevator after the occurrence of an earthquake at the site where the elevator is installed, the maintenance inspection for the elevator is started after the start of the maintenance inspection. The maintenance inspection method for elevators is such that maintenance inspection is temporarily interrupted and maintenance inspection is started again after a predetermined time has elapsed.

  According to the present invention, it is possible to efficiently and safely perform maintenance and inspection of an elevator after an earthquake occurs.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a flowchart showing a maintenance inspection method for an elevator according to the present invention. FIG. 2 is a schematic view showing a building as a maintenance inspection site.

  An elevator hoistway 2 is provided in a building (site) 1 indicated by a broken line in the figure, and a plurality of elevators (e.g., two elevators (elevators) 3a and 3b) are installed therein. The elevators 3a and 3b include passenger cars 4a and 4b that travel to the destination floor with users on them, counterweights 5a and 5b that have substantially the same weight as the passenger cars 4a and 4b, these passenger cars 4a and 4b, and counterweights 5a, The ropes 6a and 6b have their ends connected to 5b, and the hoists 7a and 7b that drive the cars 4a and 4b by winding the ropes 6a and 6b. Moreover, the control board 8 carrying the various apparatuses which control operation of these elevators 3a and 3b is installed in the machine room 9 of the building 1 uppermost part, for example.

In addition, although illustration and description are omitted here, guide rails are laid throughout the entire lifting process in the hoistway 2, and the cars 4a, 4b and counterweights 5a, 5b are guided as the tracks of the elevators 3a, 3b. Similarly, safety is ensured by the governor so that the cars 4a and 4b do not fall to the lowest floor even if the ropes 6a and 6b are cut.

  Further, at the lowermost part (pit) of the hoistway 2, a signal is output to the control panel 8 when a P wave of a predetermined value or more is detected, and the elevators 3 a and 3 b are operated in the control operation mode. A P-wave sensor 10 is installed.

  On the other hand, the machine room 9 is provided with an S wave detector 11 for outputting a signal to the control panel 8 when an S wave of a predetermined value or more is detected and forcibly stopping the operation of the elevators 3a and 3b. ing.

  In addition to these earthquake detectors 10 and 11, the elevators 3a and 3b are provided with various sensors (not shown). Some of the signals output by these sensors are transmitted from the control panel 8 to the remote monitoring center 12 via a communication line, so that the elevators 3a and 3b are always remotely monitored. If necessary, the remote monitoring center 12 may supply a signal to the control panel 8 to perform remote control and remote inspection of the elevators 3a and 3b.

  In such a configuration, maintenance and inspection work when an earthquake occurs will be described.

  Assume that an earthquake has occurred (S1). When an earthquake occurs, P and S waves propagate. Here, since the propagation time of the S wave, which is the main shock, is slower than that of the P wave, a method of operating the elevator in the control operation mode when the P wave is detected is widely known.

  When the P wave is detected by the earthquake sensor 10, a detection signal related to P wave detection is output to the control panel 8. The control panel 8 receiving this detection signal controls the elevators 3a and 3b to operate in the control operation mode. That is, the cars 4a and 4b are automatically landed on the nearest floor to get off the passengers, and the operation is stopped as it is.

  Thereafter, when the S wave propagates following the P wave, the S wave detector 11 detects this. The S wave is more dangerous than the P wave because it causes greater shaking than the P wave. Therefore, for example, even if the previously detected P wave is smaller than a predetermined value and the control operation mode is not activated, the control panel 8 forcibly stops the elevators 3a and 3b when the S wave is detected.

  Thus, the elevators 3a and 3b are stopped by detecting a P wave or S wave having a magnitude greater than or equal to a predetermined value (S2). Even if the seismic intensity is less than a predetermined value, if the guide rail is deformed due to a strong factor on the building 1 side, the elevator safety device may be activated to stop the elevators 3a and 3b.

  When the elevators 3a and 3b stop and the remote monitoring center 12 obtains information to that effect (S3), the remote monitoring center 12 selects an appropriate worker and rushes to the building 1 (S4). At this time, instead of the remote monitoring center 12, a sales office of an elevator management company or the like may perform the selection.

  The selected worker brings tools and manuals according to the models and specifications of the elevators 3a and 3b of the building 1 and goes to the maintenance inspection of the building 1. Two or more workers may perform maintenance inspections. And the worker who arrived at the building 1 starts the maintenance inspection of the elevators 3a and 3b (S5).

  “Maintenance inspection” in the present invention includes so-called restoration work. Moreover, the operation | work which rescues a passenger when a passenger is confined in the cars 4a and 4b shall be included.

  The general maintenance and inspection work starts by confirming the stop positions of the stopped elevators 3a and 3b and confirming the cause of the stop. Then, entering the hoistway 2, the cars 4a, 4b, counterweights 5a, 5b, ropes 6a, 6b, guide rails (not shown) and the like are inspected. In addition, maintenance inspection of the control panel 8 is performed in the machine room 9.

In FIG. 2, the hoisting machines 7 a and 7 b are installed in the machine room 9, but there are many types of elevators in which the hoisting machines are installed in the hoistway 2. In such a case, the hoisting machine is inspected in the hoistway.

In this way, the elevators 3a and 3b continue to stop until all maintenance inspections necessary for safety confirmation are completed.

For example, when the elevator 3a and the elevator 3b can be maintained and inspected independently, it can be said that the maintenance and inspection of the elevator 3b is first started and then the operation is resumed, and then the maintenance and inspection of the elevator 3b is started. Of course, both elevators 3a and 3b can be inspected and maintained in parallel.

  By the way, it is known that there are main shocks and aftershocks. In many cases, aftershocks occur after the mainshock, so damage to elevators due to aftershocks cannot be ignored. Although the magnitude of aftershocks is usually smaller than the mainshock, a large amount of aftershocks occur immediately after the mainshock.

  Therefore, in the present invention, even if the worker does not complete all the maintenance inspection work, the maintenance inspection is temporarily interrupted (S6). Here, various conditions can be designated as the timing of interrupting the maintenance and inspection work. For example, a method of designating an elapsed time from the start of work, a method of designating an elapsed time from the occurrence of a mainshock, a method of designating a point in time when a previously specified work is completed, and the like can be mentioned.

  The worker always leaves the hoistway 2 while the work is interrupted (S7). This is because the cars 4a and 4b, counterweights 5a and 5b, ropes 6a and 6b, hoisting machines and guide rails in the hoistway 2 are damaged by the aftershock, and these devices themselves or these This is because it can be considered that the components of the above will fall. In other words, it is necessary to keep in mind the maintenance and inspection with the highest priority given to the lives of workers.

  Of course, it is not sufficient to leave the hoistway 2 in order to ensure the safety of workers. If the ropes 6a and 6b are cut by the aftershock, the cars 4a and 4b may fall, so the worker must always leave the cars 4a and 4b.

  And in order to ensure the safety | security of a worker to the maximum, it is preferable to leave a worker from the building 1. In this case, even if the worker leaves the building 1, it is preferable that the remote monitoring center 12 can grasp the whereabouts and actions. Specifically, it should be possible to exchange information via a communication terminal (such as a mobile phone) possessed by a worker. In addition, a moving location can be designated in advance from the remote monitoring center 12 to the worker.

  Of course, if the safety of the worker is ensured, it is not impossible for the worker who once stopped the maintenance and inspection of the elevators 3a and 3b to perform the maintenance and inspection at another site.

  Note that the elevators 3a and 3b must be managed responsibly even while the maintenance inspection is suspended. Therefore, as a consideration for the residents of the building 1, it is preferable that the worker suspends the work in a state where a maintenance / inspection is displayed on the elevators 3 a and 3 b. For example, expressions such as “This elevator is undergoing maintenance and inspection” and “It takes a while for this elevator to operate” are selected.

  Thereafter, after a period of time that is considered to have been less affected by the aftershock, the worker heads for the building 1 again. And the maintenance inspection of the elevators 3a and 3b is restarted including the damaged part newly received by the aftershock (S8). Maintenance inspection is completed as much as possible by the newly started maintenance inspection work, and the operation of all the elevators 3a and 3b is resumed (S9). If large aftershocks occur frequently, maintenance and inspection may be interrupted twice or more. Further, a worker other than the worker who first performed the maintenance check may take over the maintenance check after the interruption, and the number of workers may be increased or decreased.

  In order to determine the interruption time for maintenance and inspection work, a method of referring to the decrease in the frequency of aftershocks can be considered. This is because the frequency of aftershocks is known to decrease rapidly with time. However, it takes a very long number of days for the aftershock to end completely. Therefore, it is realistic to restart the maintenance and inspection work after at least one day has passed since the mainshock, and in some cases, several days to several weeks later. Of course, this is a matter that should be decided arbitrarily according to the damage situation. It is also possible to make a decision by discussion with the manager of the building 1 and various related parties. In short, an appropriate interruption time can be determined for each site by appropriately considering the size of the main shock, the possibility of an aftershock, or the opinions of related parties.

In recent years, it is not uncommon for several elevators to be installed in one building. It takes a considerable amount of time to complete these in one maintenance inspection. Therefore, the possibility of being affected by aftershocks will be higher. In the present invention, since the maintenance inspection is temporarily interrupted, it will take time to fully recover from the main shock of the earthquake. The work time can be reduced. In addition, once the maintenance inspection is interrupted, the damage (so-called secondary disaster) caused by aftershocks on the worker can be reduced. Therefore, according to the present invention, it is possible to efficiently and safely perform maintenance and inspection of the elevator when an earthquake occurs.

  Needless to say, the present invention is not limited to the above-described embodiments, and can be variously modified. For example, the present invention is applicable not only to elevators but also to elevators such as escalators. In particular, in an escalator maintenance inspection work, an operator may enter the truss, which is almost the same as the work in the hoistway in the elevator described above. Further, the present invention is applied regardless of the scale of the site and the number of elevators, but the effect is expected as the number of elevators is two or more. In addition, the present invention can be implemented regardless of the scale or size of the main shock or aftershock. Moreover, it is extremely useful to implement the present invention even in an earthquake in which a large aftershock is not confirmed as a result.

The flowchart which shows the maintenance inspection method of the elevator which concerns on this invention. Schematic showing a building as a maintenance inspection site.

Explanation of symbols

1 building (site)
2 Hoistway 3a, 3b Elevator (elevator)
4a, 4b Car 5a, 5b Counterweight 6a, 6b Rope 7a, 7b Hoisting machine 8 Control panel 9 Machine room 10 P wave detector 11 S wave detector 12 Remote monitoring center

Claims (9)

In the elevator maintenance and inspection method for performing maintenance and inspection of the elevator after the occurrence of an earthquake at the site where the elevator is installed,
A maintenance / inspection method for an elevator, wherein the maintenance / inspection for the elevator is temporarily suspended after the maintenance / inspection is started, and the maintenance / inspection is started again after a predetermined time has elapsed.   The elevator inspection method according to claim 1, wherein the predetermined time is at least one day.   2. The elevator inspection and inspection method according to claim 1, wherein an operator who has been performing maintenance inspection leaves the site while the maintenance inspection is interrupted.   2. The maintenance inspection method for an elevator according to claim 1, wherein the maintenance inspection is started again after the occurrence of the aftershock.   The elevator maintenance maintenance inspection method according to claim 1, wherein the interruption of maintenance inspection includes a case of two or more times.   The elevator inspection method according to claim 1, wherein at least two elevators are installed at the site.   2. The elevator maintenance method according to claim 1, wherein the elevator is an elevator.   The method of claim 7, wherein the maintenance check includes work performed in a hoistway of the elevator.   The elevator maintenance method according to claim 7, wherein the maintenance inspection includes work performed in a car.

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