JP4998102B2 - Elevator control device - Google Patents

Description

  The present invention relates to an elevator control device.

  In the conventional elevator control device that suppresses the swing of the elevator rope, a car cage frame is suspended from one end of the rope wound around the hoist, and a counterweight is suspended from the other end of the rope. There is known an elevator including a vibration suppressing device that is inserted into the rope and fixed to the car frame so as to suppress the rolling vibration of the rope (for example, see Patent Document 1).

JP 2006-193256 A

The primary natural period in a high-rise building with a building height (H) exceeding 60 m varies depending on the structure of the building, but is approximately (H [m] / 1 [m]) × 0.025 [ sec] (for example, if the building height (H) is 100 m, the primary natural period is about 2.5 seconds). On the other hand, a rope for raising and lowering a car provided in an elevator installed in a building has a natural period determined by its length (that is, the position of the car during operation), density, tension, and the like.
When a high-rise building is exposed to a long-period earthquake or strong wind, it will continue to shake in the horizontal direction with the above-mentioned primary natural period, so a long-period building is installed in the machine room that houses the elevator hoisting machine, etc. Displacement excitation will continue to be input, and if the natural period of the building and the natural period of the rope are close, the rope will resonate and shake greatly, which may cause contact with or catching the hoistway. There are challenges.
And when the resonance of the elevator rope occurs, there is a risk of causing the elevator rope to contact with the hoistway, to catch on the equipment such as the landing plate installed in the hoistway, or to damage these equipment. There is also a problem that there is.
Further, in the elevator control device that suppresses the swing of the elevator rope shown in Patent Document 1, the swing suppression device provided to suppress the roll vibration of the rope is disposed in the rope end fixing portion. However, when the rope resonates due to long-period vibration and a standing wave is formed on the rope, the rope end generally becomes a node of the standing wave, so the amplitude at the rope end is small. Therefore, there is a problem that it is difficult to obtain a large vibration control effect.

  The present invention has been made to solve the above-described problems, and is an elevator control device that can suppress the resonance of an elevator rope that occurs when a building in which an elevator is installed causes long-period vibration. Is what you get.

The elevator control device according to the present invention includes an inclination detecting means for detecting an inclination of a rope end fixing portion for fixing an end portion of the rope , and one or more in an elevator having a rope for raising and lowering a car and a counterweight. Rope tension adjusting means for arbitrarily adjusting the tension of the rope by changing the height position of the rope end fixing portion of the rope, and the measured value of the inclination detecting means exceeds a predetermined threshold value The tension of the one or more ropes is adjusted to a tension determined so that a natural period of the building where the elevator is installed and a natural period of the rope are different from each other by the rope tension adjusting unit. The configuration is adjusted .

  The present invention relates to an elevator control apparatus, and an elevator having a rope for raising and lowering a car and a counterweight, and a structure provided with an inclination detection means provided at a fixing portion of the rope end and detecting an inclination of the rope end fixing portion. Therefore, it is possible to suppress the resonance of the elevator rope that occurs when the building where the elevator is installed causes long-period vibration, and to the elevator rope hoistway by suppressing the resonance of the elevator rope. There is an effect that it is possible to prevent contact with each other, catching on equipment such as a landing plate installed in the hoistway, and breakage of these equipment.

Embodiment 1 FIG.
FIGS. 1 to 7 relate to Embodiment 1 of the present invention. FIG. 1 is an explanatory diagram showing a state in which a rope vibrates due to long-period vibration in a 2: 1 roping elevator, and FIG. FIG. 3 is a front view showing the slope of the rope end fixing portion (leash stopping portion), and FIG. 4 is a rope end fixing portion using a displacement sensor as the inclination detecting means. FIG. 5 is a plan view showing the rope end fixing portion using a displacement sensor as the inclination detecting means, FIG. 6 is a flowchart showing the operation of this embodiment, and FIG. 1 is an explanatory view showing a state where a rope vibrates due to long-period vibration in an elevator of 1 roping. FIG.
In the figure, reference numeral 1 denotes an elevator hoistway in which a car 2 and a counterweight 3 are arranged so as to be movable up and down. The car 2 is stopped at each floor (not shown). In the machine room 4 above the hoistway 1, a hoisting machine 5 and a wheel 6 are installed, and a main rope 7 is wound around the hoisting machine 5 and the wheel 6. One side of the main rope 7 is wound around a car suspension wheel 8a that is rotatably mounted on the upper portion of the car 2, and the direction thereof is changed. A rope end is fixed, and the other side of the main rope 7 is wound around a weight suspension wheel 8b that is rotatably mounted on an upper portion of the counterweight 3, and the direction of the hoistway 1 is changed. The rope end is fixed at the upper rope stop 9.
A compensatory sheave 10 is installed in the lower part of the hoistway 1, and a compensatory rope 11 is wound around the compensatory 10. One end of the compo rope 11 is connected to the lower portion of the car 2, and the other end of the compen rope 11 is connected to the lower portion of the counterweight 3. The car 2 and the control panel 12 are electrically connected by a control cable 13.

Reference numeral 14 denotes a shackle rod, to which one end of the main rope 7 is connected. The anti-main rope side of the shackle rod 14 is slidably inserted into an insertion hole 16 formed in the rope retaining beam 15, and a nut 19 is screwed into the shackle spring 17 and the spring seat 18. As described above, the rope stopping portion 9 that elastically supports and fixes the end portion of the main rope 7 is configured.
The spring seat 18 is provided with an inclination detection means 20 (for example, an angle sensor or an acceleration sensor capable of measuring static acceleration), and the inclination of the shackle rod 14 detected by the inclination detection means 20. The change over time is output to the control panel 12 as an electrical signal.
The tilt detection means 20 is an X direction detection unit 20a and a Y direction detection unit using displacement sensors instead of installing the spring seat 18 with an angle sensor or an acceleration sensor capable of measuring static acceleration. 20b can also be provided (FIGS. 4 and 5).

The flowchart of FIG. 6 shows the operation of this embodiment.
Step S0 is a state in which the elevator is normally operated. In this state, the change with time of the inclination of the shackle rod 14 detected by the inclination detecting means 20 is output to the control panel 12 as an electric signal.
Since the shackle rod 14 constantly vibrates due to the operation of the hoisting machine 5 or the like, in the next step S1, a low-pass filter having a cut-off frequency of, for example, 1 Hz with respect to the signal output in step S0. Processing is performed to remove high-frequency components that are disturbances.
Then, the process proceeds to step S2, and it is determined whether or not the inclination of the shackle rod 14 exceeds a predetermined threshold using the signal from which the disturbance is removed in step S1. Here, when it is determined that the inclination of the shackle rod 14 does not exceed a predetermined threshold value, the process returns to step S0, and the monitoring of the signal output from the inclination detecting means 20 is continued.
On the other hand, if it is determined in step S2 that the inclination of the shackle rod 14 exceeds a predetermined threshold, the process proceeds to step S3, and the car 2 is retreated to the evacuation floor. The retreat floor is determined so that the natural frequency of the building and the natural frequency of the rope determined by the position of the car 2 are different.
Note that the determination in step S2 may be performed with a certain margin.
After evacuating the car 2 to the evacuation floor in step S3, the process proceeds to step S4 and waits until the inclination of the shackle rod 14 or the shaking of the building falls below a predetermined threshold. And after waiting, when it can be judged that the inclination of the shackle rod 14 or the shaking of the building has become a predetermined threshold value or less, the process proceeds to the next step S5. In this step S5, the car 2 is operated at a low speed between the terminal floors, and there is no abnormality in the torque of the hoisting machine 5, or a microphone (not shown) provided in the hoistway 1 is connected. Confirm safety such as whether abnormal noise is input. If no abnormality is found, that is, if safety can be confirmed, the process proceeds from step S6 to step S7, returns to normal operation, and the series of steps from step S0 is repeated again.
On the other hand, if an abnormality is found in step S6, the process proceeds to step S8, where the operation of the elevator is stopped, and the abnormality is reported to the elevator maintenance company, the disaster prevention center in the building, etc. Exit.

In the elevator control apparatus configured as described above, when the building in which the elevator is installed undergoes long-period vibration, the resonance of the elevator rope is constantly monitored and the occurrence of the resonance of the elevator rope is detected. Can suppress the resonance of the elevator rope by moving the car to a position where the natural frequency of the building and the natural frequency of the elevator rope are different.
By suppressing the resonance of the elevator rope, it is possible to prevent contact of the elevator rope with the hoistway, catching on equipment such as a landing plate installed in the hoistway, and damage of these equipment. Is possible.
Also, after evacuating the car and before resuming normal operation, run the car at low speed between the terminal floors to check the safety, and if an abnormality is found, stop the elevator operation At the same time, since the abnormality is promptly reported to the elevator maintenance company, the disaster prevention center in the building, etc., it is possible to recover quickly while preventing damage to the parts.
Although the above description has been given as the embodiment in the elevator of 2: 1 roping, the embodiment can be similarly performed in the elevator of 1: 1 roping as shown in FIG. In this case, without using the car suspension wheel 8a rotatably mounted on the upper portion of the car 2 and the weight suspension wheel 8b rotatably mounted on the upper portion of the counterweight 3 in FIG. Both ends of the main rope 7 are directly fixed to the upper part of the car 2 and the upper part of the counterweight 3, respectively, thereby constituting the rope stopping part 9.

Embodiment 2. FIG.
FIGS. 8 to 10 relate to the second embodiment of the present invention, FIG. 8 is a front view showing the normal state of the rope end fixing portion, and FIG. 9 controls the resonance frequency of the rope of the rope end fixing portion. FIG. 10 is a flowchart showing the operation of this embodiment. 8 and 9, the same reference numerals as those in FIGS. 2 and 3 denote the same or corresponding parts, and the description thereof is omitted.
As described above, the natural frequency of the elevator rope is determined by its length (that is, the position of the car during operation), density, tension, and the like. In the first embodiment, the natural frequency of the elevator rope is controlled by adjusting the position of the car and the resonance with the building is suppressed. However, in the second embodiment described here, the tension of the elevator rope By adjusting the natural frequency of the elevator rope, the natural frequency of the elevator rope is controlled and the resonance with the building is suppressed.
In other words, in addition to the structure of the first embodiment, the rope stopper 9 has a hydraulic jack 22 that adjusts the height position of the seat surface 21 with which the lower end of the shackle spring 17 is in contact, and the hydraulic jack 22 is hydraulically controlled. Is measured by measuring the height of the seat surface 21 and the actuator comprising the hydraulic pump 23, the hydraulic jack 22 and the valve 24 interposed between the hydraulic pump 23 and the control surface. A displacement sensor 25 for outputting to the panel 12 is provided.

The flowchart of FIG. 10 shows the operation of this embodiment.
Step S10 is a state in which the elevator is normally operated. In this state, the change with time of the inclination of the shackle rod 14 detected by the inclination detecting means 20 is output to the control panel 12 as an electric signal.
Since the shackle rod 14 constantly vibrates due to the operation of the hoisting machine 5 or the like, in the next step S11, a low-pass filter having a cutoff frequency of 1 Hz, for example, with respect to the signal output in step S10. Processing is performed to remove high-frequency components that are disturbances.
Then, the process proceeds to step S12, and it is determined whether or not the inclination of the shackle rod 14 exceeds a predetermined threshold using the signal from which the disturbance is removed in step S11. Here, if it is determined that the inclination of the shackle rod 14 does not exceed a predetermined threshold value, the process returns to step S10, and monitoring of the signal output from the inclination detecting means 20 is continued.
On the other hand, if it is determined in step S12 that the inclination of the shackle rod 14 has exceeded a predetermined threshold value, the process proceeds to step S13, and the number of times that the inclination of the shackle rod 14 has exceeded the predetermined threshold value is counted. Count up the counter.
In the determination in step S12, the determination may be made with a certain margin as in the first embodiment.
Then, after counting up the counter in step S13, the process proceeds to step S14 to determine whether or not the counter is an even number. Here, when the counter is an even number, the process proceeds to step S15, and the hydraulic jack 22 determines the height position of the seating surface 21 that receives the shackle rod 14 related to the specific main rope 7 to the specific main rope. By changing the tension of the rope 7 in the decreasing direction, the natural frequency of the building and the natural frequency of the rope determined by the tension of the main rope 7 are controlled to be different. On the other hand, if the counter is an odd number, the process proceeds to step S16, and the hydraulic jack 22 determines the height position of the seat surface 21 that receives the shackle rod 14 related to the specific main rope 7 to the specific main rope. The natural frequency of the building is controlled to be different from the natural frequency of the rope.
In step S15 and step S16, when the height position of the seat surface 21 is changed by the hydraulic jack 22, the displacement sensor 25 measures the height change amount of the seat surface 21, and the measured value is obtained. By feeding back to the control panel 12, the tension of the main rope 7 is controlled so as not to be excessive or excessive.
After adjusting the tension of the specific main rope 7 in step S15 or step S16, the process proceeds to step S17 and waits until the inclination of the shackle rod 14 or the shaking of the building falls below a predetermined threshold value. And after waiting, when it can be judged that the inclination of the shackle rod 14 or the shaking of the building has become a predetermined threshold value or less, the process proceeds to the next step S18, and after waiting for the elapse of a predetermined time, In the direction in which the tension of the specific main rope 7 restores the height position of the seating surface 21 that receives the shackle rod 14 related to the specific main rope 7 by the hydraulic jack 22, that is, through the step S15, The natural frequency of the rope is restored to the original by changing the tension of the specific main rope 7 in the direction in which the tension of the specific main rope 7 increases, or in the direction in which the tension of the specific main rope 7 decreases in the case of passing through Step S16 Above, it returns to normal driving | operation and repeats a series of flows from step S10 again.

In the elevator control apparatus configured as described above, when the building in which the elevator is installed undergoes long-period vibration, the resonance of the elevator rope is constantly monitored and the occurrence of the resonance of the elevator rope is detected. By adjusting the tension of the elevator rope so that the natural frequency of the building and the natural frequency of the elevator rope are different, the resonance of the elevator rope can be suppressed without stopping the operation of the elevator. By suppressing the resonance of the elevator rope, it is possible to prevent the elevator rope from contacting the hoistway, being caught on equipment such as a landing plate installed in the hoistway, or damaging these equipment. It is.
In addition, it counts the number of times the resonance of the elevator rope has been detected and controls the direction of increase / decrease in the tension of the elevator rope according to this count, so it is possible to equalize the wear on the sheave around which the elevator rope is wound. It is.
In addition, about the above, it is the same as that of Embodiment 1 that it can be implemented in any elevator of 2: 1 roping and 1: 1 roping.

It is explanatory drawing which shows the state which the rope vibrates by long-period vibration in the elevator of 2: 1 roping in Embodiment 1 of this invention. It is a front view which shows the normal time of the rope end fixing | fixed part (tether stop part) in Embodiment 1 of this invention. It is a front view which shows the time of the inclination of the rope end fixing | fixed part (tether stop part) in Embodiment 1 of this invention. It is a top view which shows the normal time of the rope end fixing | fixed part which used the displacement sensor as an inclination detection means in Embodiment 1 of this invention. It is a top view which shows the time of the inclination of the rope end fixing | fixed part which used the displacement sensor as an inclination detection means in Embodiment 1 of this invention. It is a flowchart which shows the operation | movement in Embodiment 1 of this invention. It is explanatory drawing which shows the state which the rope vibrates by long period vibration in the 1: 1 roping elevator in Embodiment 1 of this invention. It is a front view which shows the normal time of the rope end fixing | fixed part in Embodiment 2 of this invention. It is a front view which shows the state which is controlling the resonance frequency of the rope of the rope end fixing | fixed part in Embodiment 2 of this invention. It is a flowchart which shows the operation | movement in Embodiment 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hoistway 2 Passenger car 3 Counterweight 4 Machine room 5 Hoisting machine 6 Solase wheel 7 Main rope 8a Car suspension vehicle 8b Weight suspension vehicle 9 Tightening part 10 Compensation 11 Compope rope 12 Control panel 13 Control cable 14 Shackle rod 15 Tension stop Beam 16 Insertion hole 17 Shackle spring 18 Spring seat 19 Nut 20 Tilt detection means 20a X direction detection unit 20b Y direction detection unit 21 Seat surface 22 Hydraulic jack 23 Hydraulic pump 24 Valve 25 Displacement sensor

Claims (6)

In an elevator having a rope that raises and lowers a car and a counterweight,
An inclination detecting means for detecting an inclination of the rope end fixing portion for fixing the end of the rope ;
Rope tension adjusting means for arbitrarily adjusting the tension of one or more ropes by changing the height position of the rope end fixing portion of the rope ;
When the measured value of the inclination detecting means exceeds a predetermined threshold, the tension of the one or more ropes is different from the natural period of the building in which the elevator is installed and the natural period of the rope. An elevator control device , wherein the rope tension adjusting means adjusts the tension determined in such a manner .   The elevator control device according to claim 1, wherein the inclination detection unit detects at least one of displacement, speed, acceleration, and angle of the rope end fixing portion.   3. The elevator control device according to claim 1, further comprising a low-pass filter that removes a high-frequency component from a measurement value of the inclination detection unit. 4. The elevator control device according to any one of claims 1 to 3, wherein the rope tension adjusting means includes an actuator. A counting means for counting the number of times the tension of the one or more ropes is adjusted by the rope tension adjusting means ;
The elevator control device according to any one of claims 1 to 4 , wherein a direction of increasing or decreasing tension of the one or more ropes is controlled according to the number of times counted by the counting means. 6. The elevator control device according to claim 5, wherein the increasing / decreasing direction of the tension of the one or more ropes is alternately changed according to the even / odd number of the times counted by the counting means.

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