JP5535441B2 - Elevator control operation device - Google Patents

Description

  The present invention relates to an elevator control operation device that switches to control operation when a building is greatly shaken by an earthquake or strong wind.

  When a building is made taller, the natural frequency of the building decreases, so that resonance phenomenon is likely to occur during an earthquake or a strong wind. When the resonance phenomenon occurs, the building shakes greatly, and the elevator equipment installed in the building also shakes greatly. As a result, the elevator car stops between the floors and a so-called “confinement accident” occurs.

  In order to prevent such a confinement accident, recent elevators are equipped with a safety device called a “seismic control operation device”. In this case, when an acceleration (sway) exceeding a predetermined value is detected by the earthquake detector, the car is automatically moved to the nearest floor, where the passengers are lowered and the operation is stopped.

  As described above, the basic concept of a general seismic control operation apparatus is to detect the acceleration at the time of occurrence of an earthquake and to judge that it is dangerous when it exceeds a predetermined value and to perform the control operation. However, to be precise, whether buildings and elevator systems are in danger due to the occurrence of an earthquake does not depend solely on the detected acceleration, but the natural frequencies of the buildings and elevator equipment and the predominance of seismic waves. It also depends on the relationship with the frequency or the vibration characteristics of buildings and elevator facilities (see, for example, Patent Document 1).

In addition, there is a technique in which the elevator rope is replaced with a simple one-degree-of-freedom model based on the acceleration detected by the acceleration sensor, and the control operation is performed by estimating the response of the rope (see, for example, published document 2).
Japanese Patent Publication No. 6-37269 JP 2007-331901 A

  In Patent Document 1, individual resonance frequencies of an elevator installation including a rope are set in advance, and a control operation is performed when vibrations matching these resonance frequencies are detected. In this case, since only the resonance frequency for the rope is set at a predetermined length (for example, the longest state), if the rope length changes depending on the position of the car, there is a possibility that the control operation is discriminated. There is.

  Further, since the above Patent Document 2 is configured to simply estimate the response of the rope using a one-degree-of-freedom system model, there is a possibility that an error may occur between the actual rope response. Furthermore, in order to estimate the response of the rope according to the car position, there are problems such as requiring a large number of one-degree-of-freedom system models.

  The present invention has been made in view of the above points, and provides an elevator control operation device capable of executing an operation control by obtaining an accurate rope response when a building is shaken by an earthquake or a strong wind. For the purpose.

An elevator control operation device according to the present invention is an elevator control operation device provided with a car that moves in a hoistway via a rope wound around a hoisting machine, and an acceleration installed at a predetermined position of a building. A sensor, a building displacement calculating means for calculating the amount of displacement of the building using an output signal of the acceleration sensor, a position of the car with respect to the amount of building displacement determined by the building displacement calculating means, and a maximum of the rope Determining means for preliminarily storing displacement characteristic data set based on a relationship with relative displacement, analyzing a rope response by referring to the displacement characteristic data, and determining a danger level based on the rope response; And a control operation control means for executing a control operation in accordance with the danger level determined by the determination means.

  ADVANTAGE OF THE INVENTION According to this invention, when a building shakes by an earthquake, a strong wind, etc., an exact rope response can be calculated | required and control operation can be performed.

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

  FIG. 1 is a diagram showing an overall configuration of an elevator according to an embodiment of the present invention. Assume that one elevator 11 is installed in a building 10.

  A hoisting machine 12 that is a drive source of the elevator 11 is installed in a machine room 10 a at the top of the building 10. In a machine roomless type elevator in which no machine room is installed, the hoisting machine 12 is installed in the upper part of the hoistway.

  A main rope 13 is wound around the hoisting machine 12. One end of the main rope 13 is attached to a car 14 and the other end is attached to a counterweight 15. A compensatory sheep 17 is disposed at the lowermost part of the hoistway, and the ends of the compensatory rope 16 are attached to the lower portions of the car 14 and the counterweight 15 via the compensatory sheep 17.

  Further, a governor (regulator) 18 is disposed near the hoisting machine 12, and a governor sheep 19 is disposed near the compensatory sheep 17, and a governor rope 20 is wound around the governor 18 and the governor sheave 8. The governor rope 20 is connected to the car 14, and the governor 18 rotates in synchronization with the traveling speed of the car 14 via the governor rope 20.

  On the other hand, in the machine room 10a of the building 10 or the machine roomless type, a control device 21 for controlling the operation of the elevator 11 is installed in the hoistway. The control device 21 includes a computer equipped with a CPU, ROM, RAM, and the like, and executes a series of processes related to operation control of the elevator 11 such as drive control of the hoisting machine 12. Further, as will be described later, the control device 21 has a function as a control operation device for executing the control operation when the building 10 is shaken by an earthquake, a strong wind, or the like.

  Near the installation position of the control device 21, an acceleration sensor 22a for detecting acceleration in the x direction and an acceleration sensor 22b for detecting acceleration in the y direction are installed. These acceleration signals ax, ay Is output to the control device 21.

  A load sensor 24 is attached to the bottom of the car 14, and data on the loading w of the car 14 detected by the load sensor 24 is output to the control device 21.

  A car position detector 23 is attached to the rotating shaft of the hoisting machine 12. The car position detector 23 is composed of a pulse generator that generates a pulse signal in synchronization with the rotation of the hoisting machine 12, and is configured to detect the position of the car 14 from the count value of the pulse signal. The car position h data detected by the car position detector 23 is output to the control device 21. For example, a position sensor (not shown) may be installed on each floor, and the car position may be detected using a signal output when the car 14 passes through these position sensors.

  The controller 21 controls the hoisting machine 12 based on these detection signals. When the hoisting machine 12 is driven, the car 14 moves along the main rope 13 along the counterweight 15 in a hoistway manner.

  The control device 21 is connected to an external monitoring center 32 via a communication network 30 such as a public network. The monitoring center 31 constantly monitors the operation state of the elevator via the communication network 30, and responds by, for example, dispatching maintenance personnel to the site when any abnormality is detected.

  FIG. 2 is a block diagram showing the configuration of the control operation function provided in the control device 21 in the same embodiment.

  As shown in FIG. 2, the control device 21 includes a building displacement calculation unit 41, a storage unit 42, a control operation selection determination unit 43, and a control operation control unit 44.

  The building displacement calculation unit 41 obtains the displacement amount (swing amount) of the building 10 based on the x-direction and y-direction acceleration signals ax, ay output from the acceleration sensors 22a, 22b installed in the building 10.

  The storage unit 42 stores various data necessary for the control operation. The storage unit 42 includes a database 42a and a determination result recording unit 42b. In the database 42a, data related to the risk levels D1 to D4 that are the criteria for the control operation are stored in advance. The danger levels D1 to D4 will be described in detail later. The determination result of the control operation is recorded as a history in the determination result recording unit 42b.

The control operation selection determination unit 43 further adds the loading w of the car 14 to the relationship between the car position h and the maximum relative displacement of the main rope 13 with respect to the displacement amounts δ _{x and} δ _y of the building 10 calculated by the building displacement calculation unit 41. The rope response is analyzed using displacement characteristic data (see FIG. 5) in consideration of the above, and the danger level is determined based on the rope response. The control operation control unit 44 executes the control operation according to the danger level determined by the control operation selection determination unit 43.

Next, the operation of the embodiment will be described.
When the building 10 shakes due to an earthquake or a strong wind, the acceleration sensors 22 a and 22 b detect the shaking of the building 10 and output acceleration signals ax and ay in two directions (x direction and y direction) to the building displacement calculation unit 41. Is done. The building displacement calculation unit 41 calculates the displacement amounts δ _{x and} δ _y of the building 10 by integrating the acceleration signals ax and ay, and outputs the result to the control operation selection determination unit 43.

As shown in FIG. 3, the building displacement calculation unit 41 calculates the combined displacement amount d obtained by combining the x direction and the y direction from the displacement amounts δ _{x and} δ _y as follows, and the result is controlled. It may be configured to output to the selection determination unit 43.

d = √ (δ _x ² + δ _y ² ) (1)
In the above equation (1), the symbol √ is assumed to cover the whole of (δ _x ² + δ _y ² ).

In the following, the configuration of FIG. 3 using the composite displacement amount d will be described as an example.
FIG. 4 is a diagram showing an example of the response analysis of the rope to the shaking of the building, and shows the response characteristic of the main rope 13 on the car 14 side, that is, the main rope 13 between the car 14 and the hoisting machine 12. .

  Now, it is assumed that the car 14 is stopped at a predetermined position (for example, the lowest floor). At this time, if the building 10 is shaken as shown in FIG. 4A, the portions of the main rope 13 are shaken as shown in FIGS. 4B, 4C, and 4D. FIG. 4B shows a quarter portion from the top of the rope, FIG. 4C shows the center portion of the rope, and FIG. 4D shows how the ¾ portion of the rope swings. From these figures, it can be seen that when the building 10 is shaken, the central portion of the rope is shaken most.

  In addition to the main rope 13, the rope used for the elevator 11 includes a compen- sion rope 16 and a governor rope 20 as shown in FIG. It is preferable that the same response analysis is performed for these ropes, the maximum displacement (maximum relative displacement with respect to the building) of each rope is obtained, and the displacement characteristics as shown in FIG. 5 are analyzed. For the main rope 13, more accurate displacement characteristics can be obtained by taking into account the load on the car 14.

  FIG. 5 is a diagram showing the relationship between the car position and the maximum relative displacement of the rope, and shows a state when the maximum value of the building displacement amount d is a predetermined value (for example, 50 mm).

  In the example of FIG. 5, the displacement characteristics (solid line in the figure) of the main rope 13 on the car 14 side during no load (NL) and the displacement of the main rope 13 on the car 14 side during full load (FL). Three characteristics are shown: a characteristic (one-dot chain line in the figure) and a displacement characteristic of the main rope 13 on the counterweight 15 side (a dotted line in the figure).

  Note that no-load (NL) is a state in which the loading load of the car 14 is zero, that is, a state in which no passenger is on the car 14. The full load (FL) is a state in which the loading load of the car 14 is full, that is, a state where passengers on the car 14 are on board.

  The rope response to the displacement amount d of the building 10 is analyzed from these displacement characteristics, and the most dangerous state, that is, the state where the main rope 13 is likely to be caught by equipment in the hoistway is determined as the danger level D4.

  Further, with the danger level D4 as a reference, the other danger levels D3, D2, and D1 are set to be lower stepwise as follows.

D3 = D4 × 0.8
D2 = D4 × 0.5
D1 = D4 × 0.2.

The danger level D3 is a state corresponding to 80% of the swing of the main rope 13 at the danger level D4. At this risk level D3, the car 14 is moved to the retreat floor, that is, the nearest floor, and the operation is stopped (control operation level L3).
The danger level D2 is a state equivalent to 50% of the swing of the main rope 13 at the danger level D4. At this risk level D2, the car 14 is decelerated to limit the service floor (control operation level L2).

  The danger level D1 is a state corresponding to 20% of the shaking of the main rope 13 at the danger level D4. At this danger level D1, the state of building shaking is displayed in a car room or landing (control operation level L1).

  If the risk level is less than D1, normal operation is continued without performing control operation.

  In order to make the relationship between the risk levels D4, D3, D2 and D1 and the swing of the main rope 13 easy to understand, D4, D3, D2 and D1 are conveniently shown next to the displacement characteristic diagram of FIG. It is noted.

  In the example of FIG. 5, the displacement characteristics of each part of the main rope 13 when d = 50 (mm) are shown. For the displacement characteristics when d = 50, the displacement characteristics of FIG. It can be easily determined linearly with reference.

  The database 42a shown in FIG. 3 stores data relating to such danger levels D4, D3, D2, and D1 in association with displacement characteristic data including the building displacement amount d, the car position h, and the loading w. The control operation selection determination unit 43 acquires a danger level corresponding to the current building displacement amount d from the database 42a, and causes the control operation control unit 44 to execute a control operation according to the danger level.

FIG. 6 shows the processing operation at that time.
The control operation selection determination unit 43 includes the car position h detected by the car position detector 23 and the load sensor 24 in addition to the composite displacement amount d of the building 10 calculated by the building displacement calculation unit 41. The detected loading w is given.

  The control operation selection determination unit 43 collates the building displacement amount d, the car position h, and the loading w with data related to the danger levels (D1, D2, D3, D4) stored in the database 42a (step S11).

  As a result, when the building displacement amount d is less than or equal to the risk level D1, that is, the maximum relative displacement of the main rope 13 obtained from the building displacement amount d, the car position h and the loading w is less than the risk level D1. In such a case (Yes in step S12), the control operation selection determination unit 43 selects zero as the control operation level and gives it to the control operation control unit 44. Thereby, the control operation control unit 44 continues the normal operation without executing the control operation (step S13).

  On the other hand, when the building displacement amount d is less than the risk level D1 and less than D2, that is, the maximum relative displacement of the main rope 13 obtained from the building displacement amount d, the car position h and the loading w is greater than the risk level D1. When it is less than D2 (Yes in step S14), the control operation selection determination unit 43 selects the control operation level L1 and gives it to the control operation control unit 44. Thereby, the control operation control unit 44 displays the state of the building shaking in the cab or the landing (step S15).

  When the building displacement amount d is greater than or equal to the risk level D2 and less than D3, that is, the maximum relative displacement of the main rope 13 obtained from the building displacement amount d, the car position h and the loading w is greater than or equal to the risk level D2. When it is less than D3 (Yes in step S16), the control operation selection determination unit 43 selects the control operation level L2 and gives it to the control operation control unit 44. Thereby, the control operation control unit 44 operates the car 14 while decelerating and restricting the service floor (step S17).

  When the building displacement amount d is greater than or equal to the risk level D3, that is, when the maximum relative displacement of the main rope 13 obtained from the building displacement amount d, the car position h, and the loading w is greater than or equal to the risk level D3. (No in step S16), the control operation selection determination unit 43 selects the control operation level L3 and gives it to the control operation control unit 44. Thereby, the control operation control part 44 moves the passenger car 14 to the retreat floor (the nearest floor), and stops and controls the operation (step S18).

As described above, the displacement characteristic data in which the load w of the car 14 is further added to the relationship between the car position h and the maximum relative displacement of the main rope 13 with respect to the displacement amounts δ _{x and} δ _y of the building 10 can be accurately used. The rope response can be obtained, and the control operation can be performed by appropriately determining the danger level according to the rope response at that time.

  In the above-described embodiment, the main rope 13 has been described as an example. However, the present invention can be similarly applied to responses of other ropes such as the compen- sion rope 16 and the governor rope 20.

  Further, instead of directly integrating the displacement amount of the building 10, the calculation time required for integration may be shortened by integrating only the components near the natural frequency of the building 10.

  It is also possible to record information about the amount of shaking of the building and the determination result of the control operation in the determination result recording unit 42 b of the storage unit 42 and transfer the information to the monitoring center 31 via the communication network 30.

  Moreover, since the above-mentioned danger levels (D1, D2, D3, D4) depend on the characteristics of the building 10 and the characteristics of the elevator 11 installed there, the danger level is monitored using the data after the start of operation. If the control operation is corrected by remote control, it is possible to more accurately determine whether or not the control operation should be performed.

  In short, the present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the components without departing from the scope of the invention in the implementation stage. Moreover, various forms can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be omitted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

FIG. 1 is a diagram showing an overall configuration of an elevator control operation apparatus according to an embodiment of the present invention. FIG. 2 is a block diagram showing a configuration of a control operation function provided in the control device in the same embodiment. FIG. 3 is a block diagram showing another configuration of the control operation function provided in the control device in the same embodiment. FIG. 4 is a diagram illustrating an example of a response analysis of a rope with respect to shaking of a building in the same embodiment. FIG. 5 is a diagram showing the relationship between the car position and the maximum relative displacement of the rope in the same embodiment. FIG. 5 is a flowchart showing the processing operation of the control device in the embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Building, 10a ... Machine room, 11 ... Elevator, 12 ... Hoisting machine, 13 ... Main rope, 14 ... Ride car, 15 ... Counterweight, 16 ... Compen rope, 17 ... Compensation, 18 ... Governor, 19 ... Governor sheep, 20 ... governor rope, 21 ... control device, 22a ... acceleration sensor in x direction, 22b ... acceleration sensor in y direction, 23 ... car position detector, 24 ... load sensor, 30 ... communication network, 31 ... monitoring center, 41 ... building displacement calculation unit, 42 ... storage unit, 42a ... database, 42b ... determination result recording unit.

Claims (7)

In an elevator control operation device having a car that moves in a hoistway via a rope wound around a hoisting machine,
An acceleration sensor installed at a predetermined position of the building;
Building displacement calculation means for calculating the displacement amount of the building using the output signal of the acceleration sensor;
Displacement characteristic data set based on the relationship between the position of the car and the maximum relative displacement of the rope with respect to the amount of building displacement calculated by the building displacement calculating means is stored in advance, and the displacement characteristic data is A determination means for analyzing the rope response by referring to and determining a danger level based on the rope response;
A control operation device for an elevator, comprising: control operation control means for executing a control operation according to the danger level determined by the determination means.   The determination means analyzes the rope response by further adding the load of the car to the relationship between the position of the car and the maximum relative displacement of the rope with respect to the amount of displacement of the building. The elevator control operation device according to claim 1.   As the danger level, a fourth level indicating a state in which the rope is likely to be caught on the equipment in the hoistway, and third to first levels set stepwise based on the fourth level. The elevator control operation apparatus according to claim 1, wherein the elevator control operation apparatus has a level of   The control operation device for an elevator according to claim 3, wherein the control operation control means stops the operation by moving the car to the nearest floor in the case of the fourth level.   The control operation device for an elevator according to claim 3, wherein the control operation control means limits the service floor by decelerating the car in the case of the third level.   The control operation device for an elevator according to claim 3, wherein the control operation control means displays a state where the building is shaken at a predetermined location in the case of the second level. Recording means for recording the result of the determination means,
2. The elevator control operation device according to claim 1, wherein the discrimination result recorded in the recording means is transferred to an external monitoring center.

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