JPS6210905B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of operating elevators installed in high-rise buildings such as high-rise buildings during strong winds.

In recent years, the number of high-rise buildings has increased rapidly, and the elevators installed in them have become indispensable as transportation within the building. By the way, since high-rise buildings have flexible structures due to their earthquake-resistant design, they always sway laterally during strong winds. On the other hand, the length of the main rope for elevators installed in high-rise buildings, etc. is 200 m.
As a result, the rope oscillates due to the lateral oscillation of the building.

Figure 1 shows the relationship between the rope length and the first-order natural frequency of the building in the lateral direction. In this figure, the first-order natural frequency in the lateral direction of typical buildings in Japan is indicated by a circle. Further, the solid line A shows the characteristics when the maximum tension of the rope is 1100 kg, and the broken line B shows the characteristics when the maximum tension of the rope is 700 kg. As can be seen from this figure, when the rope length corresponds to the building height,
The natural frequencies of the rope and the building become close to each other, and when the building oscillates laterally, the rope also tends to oscillate in sync with the lateral oscillation of the building. If lateral vibration occurs in the rope, there is a risk that the rope may become entangled with equipment in the elevator tower due to the amplitude of the lateral vibration, resulting in a stoppage accident or the like.

Conventionally, structural countermeasures such as installing elevator main rope vibration damping devices have been taken to prevent lateral vibrations of buildings that may cause such accidents. The only measures taken were to shut down the elevators.

The present invention has been made in view of this point, and its purpose is to reduce the lateral deflection of the elevator main rope that occurs due to the lateral deflection of the building during strong winds, and to operate the elevator safely. Provide instructions on how to operate an elevator.

In order to achieve this object, the present invention provides a strong wind control operation command device for lateral vibration of a building during strong winds, and when a building lateral vibration occurs during strong winds, this strong frequency control operation command device is installed. Let it work,
The elevator is operated only in the upper service zone, and the length of the main rope is shortened to reduce the lateral swing amplitude of the main rope.

As shown in Figure 2, when the car 1 is stopped at the lowest floor, the length of the main rope 2 almost corresponds to the height of the building. As shown by the broken line, when lateral vibration occurs, a resonance state occurs, and its maximum amplitude can reach 1 m or more. If the elevator is moved while the main rope rope 2 is experiencing a large lateral vibration amplitude, the main rope rope 2 will become tangled with the tower equipment and brackets as described above, resulting in an elevator stoppage accident. There is a possibility that this will happen. On the other hand, when the car 1 is stopped in the upper service zone as shown in Figure 3, the length of the main rope 2 is short, so it does not resonate as described above, The vibration amplitude is small. At this time, the rope 2 on the counterweight 3 side becomes longer and lateral vibration occurs, but since the rope 2 on the counterweight 3 side hangs down close to the wall of the hoistway 4, the lateral vibration develops into a large amplitude. There's nothing to do. Therefore, by operating with a shortened main rope length, that is, by operating only in the upper service zone, the above-mentioned stoppage accident can be prevented and the elevator can be operated safely even in strong winds.

In these figures, 5 is the elevator machine room floor,
6 is a driving electric motor, and 7 is a deflection wheel.

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

FIG. 4 is an explanatory diagram of the elevator service floor. In the figure, ○ marks indicate floors that stop, and △ marks indicate floors that do not stop during strong wind control operation. It is assumed that one low-rise elevator serves floors 1-10, and one high-rise elevator serves floors 1, 2, 3, and 10-20. Since the main rope length of the low-rise elevator is short, it does not resonate with the lateral vibration of the building, and the vibration displacement is small, so there are no problems. On the other hand, high-rise elevators suffer from the problem of the main rope swaying as described above due to the continuous swaying of the building due to strong winds. For this reason, as shown by the △ symbol, the services on the 1st, 2nd, and 3rd floors, where the main rope length is longer, are cut during strong winds, and the upper service zone on the 10th to 20th floors, where the main rope length is shorter, is cut. drive only in

FIGS. 5 and 6 show an example of an in-car operation panel destination floor button circuit and a hall button circuit for causing a high-rise elevator to perform such a controlled operation during strong winds.

In Fig. 5, a switch SW1 is installed on the monitoring panel, elevator machine room, or in-car operation panel to manually command control operation during strong winds, and an anemometer is used to automatically detect strong winds when the wind speed exceeds a predetermined value. A wind speed detection contact FS is provided that turns on when it detects that the wind speed has cooled. Therefore, these switches SW1 or contact FS
P-SW1-WK-N or P- by turning on
A closed circuit of FS-WK-N is formed, and the controlled operation command relay WK operates to enter controlled operation.

When the control operation command relay WK operates, its normally closed contact WKb turns OFF, so the car destination floor buttons 1C to 3C on the 1st to 3rd floors become invalid, while in Fig. 6, the upper hall button on the 1st floor 1U, 2nd floor upper hall button 2U and lower hall button 2D, 3
Upper hall button 3U and lower hall button 3 on the floor
D becomes invalid. In other words, both the in-car destination floor buttons and hall buttons on the 1st to 3rd floors are disabled, and the elevator service floors are operated only by the in-car destination floor buttons and hall buttons on the 10th to 20th floors, and the elevators go to the 1st to 3rd floors. does not serve. Therefore, the rope is operated only in the upper service zone where the length of the rope is short, and the maximum amplitude of the lateral swing of the rope can be kept small.

In addition, the first floor, where the elevator has the most chances to stop, is generally set as the waiting floor in many cases. In other words, in Figure 5, during normal operation, if both hall calls and car calls disappear, the relay contact that turns ON when both hall calls and car calls disappear.
YN turns on, P-WKb-YN-R1-C1-N
It is configured so that it is on standby on the first floor due to the closed circuit. However, as mentioned above, the control operation command relay
When WK operates, its normally closed contact WKb turns OFF.
Then, since the normally open contact WKa turns ON, the above P-WKb
The -YN-R1-C1-N circuit is opened, and the P-WKa-YN-R10-C10-N circuit is closed instead, switching from the 1st floor standby to the 10th floor standby. Therefore, the maximum amplitude of the lateral swing of the main rope can be kept small.

In addition, in these figures, C1, C2, ...... are 1
Floor, 2nd floor,... Car destination floor button detection relay, C
1a, C2a, ...... are their normally open contacts, F1a,
F2a, …… are the 1st floor, 2nd floor, …… normally open contacts of the elevator stop zone detection relay, R1, R2
………; RU1, RU2, ………; RD2, RD3,
...Resistance, U1, U2, ...... are on the 1st floor, on the 2nd floor,
......Upper hall button detection relay, U1a, U2
a, …… are the normally open contacts, D2, D3, ……
are the 2nd floor, 3rd floor, . . . downward hall button detection relays, and D2a, D3a, . . . are their normally open contacts.

In the above embodiment, the case where the wind speed is detected in one stage was described, but this can be set in several stages, for example, when the wind speed is 30 m/s or more, only the upper zone is serviced, and when the wind speed is 30 to 20 m/s, the service is provided. Regarding high-rise elevators, it is also possible to service not only the upper zones but also the first floor, which is the lobby floor. In this case, the 1st floor destination floor button detection relay C1 in FIG.
The circuit shown in FIG. 6 and the circuit of the first floor upward hall button detection relay U1 in FIG. 6 are switched as shown by the broken line using a connection change switch or the like. By servicing high-rise elevators on the first floor in this way, the hassle of connecting on the 10th floor can be eliminated. In addition, when the speed is less than 20m/s, all floors will be serviced.

Further, although the case where there is one elevator for low-rises and one elevator for high-rises has been described, even when there are a plurality of elevators for high-rises, strong wind control operation can be performed in the same way as in the case of one elevator. In this case, by suspending some of the machines, switching the other machines to serve only the upper zone, and switching the other machines to service the upper zone and the first floor (lobby floor), all machines can cause an accident. This makes it possible to reduce the probability and secure the number of elevators that serve the building. An example of a control circuit for performing such an operating method is shown in FIG.

In Figure 7, the total number of high-rise elevators is six, and during controlled operation, two of them, No. 1 and No. 2, serve only the upper zone, and two, No. 3 and No. 4, serve the upper zone and the upper zone. It is assumed that the two service machines No. 5 and No. 6 on the lobby floor will be suspended.

As mentioned above, the control operation command relay WK is activated by turning on the control operation switch SW1 or the wind speed detection contact FS.
When operates, its common contact WKa turns ON, so P-WKa-SW2-AH and BH parallel body-
Due to the closed circuit of N, service command switches AH and BH operate only in the upper zone of No. 1 and 2 units, and No. 1,
Unit 2 only serves the upper zone, and P
-WKa-SW3-parallel body of CD and ED -N closed circuit operates No. 3, Unit 4 upper zone and 1st floor service command switches CD, ED, No. 3,
Unit 4 serves the upper zone and the first floor, and also serves as a parallel body of P-WKa-SW4-FK and GK.
No. 5 and 6 unit shutdown command switch due to N closed circuit
FK and GK are in operation, and No. 5 and 6 machines are suspended. It should be noted that the switching contents of each of the switches SW2 to SW4 and the number of switches to be switched can be arbitrarily selected by simply changing the circuit configuration.

As explained above, according to the present invention, when a large lateral vibration occurs in a building due to strong winds, the elevator is operated only in the upper service zone where the main rope length is short, so special structural measures are taken. The lateral swing amplitude of the main rope can be suppressed to a small level without the need to apply any tangles, and as a result, it is possible to safely operate the elevator by preventing stoppage accidents caused by entanglement of the main rope with equipment in the tower. I can do it.

[Brief explanation of the drawing]

Figure 1 is a characteristic diagram showing the relationship between the main rope length and the primary natural frequency of the building in the lateral direction, and Figures 2 and 3 show the relationship between the car position and the lateral vibration amplitude of the main rope. FIG. 4 is an explanatory diagram of an elevator service floor showing an operation method in strong winds according to an embodiment of the present invention, and FIGS. 5 and 6 are illustrations of an elevator service floor implementing an operation method according to an embodiment of the present invention. FIG. 7 is a control circuit diagram used to carry out an operating method according to another embodiment of the present invention. SW1...Manual strong wind control operation switch, FS...
...Wind speed detection contact, WK...Control operation command relay,
WKa, WKb...normally open, normally closed contact, 1C, 2
C, 3C, ... Destination floor button in the car, 1U, 2U, ...
... ; 2D, 3D, ... Hall button, YN ... Relay contact that turns ON when neither hall call nor car call is available.

Claims (1)

[Scope of Claims] 1. A method for operating an elevator that services between multiple floors of a building during strong winds, including providing a strong wind control operation command device for lateral vibration of the building during strong winds, When lateral vibration occurs, the strong wind control operation command device is activated,
A method for operating an elevator during strong winds, characterized by operating the elevator only in the upper service zone. 2. A method for operating an elevator during strong winds, as set forth in claim 1, wherein the waiting floor is switched from a lower service zone to an upper service zone in accordance with the operation of the strong wind control operation command device.