JPH1017232A - Earthquake sensing device of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earthquake sensing device for an elevator, which can restitute the elevator quickly and effectively. SOLUTION: The acceleration outputted by an acceleration sensig means 5 mounted on an elevator apparatus is sensed by a tremor sensing means of an earthquake sensing device, and the displacement of the elevator apparatus determined by a calculating means 13 is compared with the tolerable value stored previously, and thereupon a damage judging means 17 judges whether any damage is generated. If the calculation given by the judging means 17 lies within the tolerance, judgement is passed that no failure exists in the elevator apparatus, and the elevator is operated at a low speed by an automatic low speed operating means 19. The acceleration during this low speed operation is compared by the judging means 17 with the specified acceleration as the normal so as to determine whether there is any problem, and if no, the elevator is restituted to the normal operation by an automatic restituting means 14. If judgement is such that the elevator is damaged, it is informed to outside by a damage transmitting means 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator seismic sensing device, and more particularly to an elevator seismic sensing device for predicting and diagnosing damage of an elevator device by using vibration of the elevator device during an earthquake.

[0002]

2. Description of the Related Art Conventional elevator seismic sensing devices are set to detect earthquake vibration in two stages.
If the detected vibration is between the low setting value and the high setting value, stop the elevator.If the vibration exceeding the high setting value does not propagate within the set time, the elevator automatically returns to normal operation. I'm back. On the other hand, if the detected vibration exceeds the high set value, the elevator maintenance staff inspected the elevator equipment for damage and then manually reset the seismic sensing device to return the elevator to normal operation. .

[0003]

However, in the conventional elevator seismic sensing device, as described above, when the vibration of the earthquake exceeds the high set value of the earthquake sensing device, the elevator maintenance person goes to the elevator and inspects the elevator. The elevator was returned to normal operation after confirming that there was no damage to each of the equipment.If a strong earthquake occurred in a wide area and many elevators were stopped, elevator maintenance personnel were required to check all of these elevators. Must be dispatched, and it takes a lot of time and effort to recover.

It is an object of the present invention to provide an elevator seismic sensing device capable of quickly and efficiently recovering an elevator.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an elevator seismic sensor for detecting earthquake vibration and stopping the elevator when the detected vibration is greater than a predetermined value. Earthquake detection means for detecting an earthquake from acceleration detection means provided in the elevator equipment,
Calculating means for calculating a displacement acting on the elevator equipment at the time of the earthquake, comparing the calculated displacement with an allowable value of the elevator equipment, and when the calculated displacement exceeds the allowable value, the elevator equipment may be damaged. And a damage judging means for judging that the information has been received.

As described above, the elevator seismic sensing device of the present invention obtains the displacement of the elevator equipment from the acceleration detecting means attached to the elevator equipment, compares it with a previously stored allowable value, and exceeds the allowable value. Damage judgment means for judging that damage has occurred is provided, so that damage judgment means can accurately judge the damage and notify the outside only when damage has occurred in the elevator Thus, the elevator can be quickly and efficiently restored.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of an elevator employing an elevator earthquake sensing device according to an embodiment of the present invention. A main rope 11 is hung on a sheave 7 of a hoist 6 provided in a machine room above a hoistway. One end of the main rope 11 is connected to the car 1 which moves up and down along the guide rail 3,
The other end is connected to the counterweight 2 which moves up and down along the guide rail 4. The acceleration detecting means 5 is attached to the control panel 8, the car 1, and the counterweight 2 installed in the machine room, respectively, so that when an acceleration equal to or more than a set value is detected, the earthquake sensing device 30 operates. Is configured.

The earthquake sensing device 30 determines the occurrence of an earthquake when an acceleration equal to or greater than a set value is detected by the acceleration detecting means 5 attached to the control panel 8, the car 1, and the counterweight 2 installed in the machine room. Earthquake detection means 16
And an elevator stop command circuit 15 for giving a stop command to the elevator when an earthquake is detected, and a buffer 12 for temporarily storing acceleration data output from the acceleration detecting means 5.
Calculating means 13 for calculating the forces and displacements acting on the guide rails 3 and 4 and the control panel 8 from the acceleration data of the acceleration detecting means 5, and calculating the guide rails 3 and 4 And damage determining means 18 for comparing the allowable values of the control panel 8 to determine the damage to the guide rails 3 and 4 and the control panel 8. When the damage determining means 18 determines that there is no damage, the control panel 8 includes Automatic low-speed operation means 19 for giving an automatic low-speed operation command, acceleration of the car 1, the counterweight 2, and the control panel 8 when the elevator is operated at low speed by the automatic low-speed operation means 19, and the detected acceleration The accelerations of the car 1, the counterweight 2 and the control panel 8 when the elevator is normal stored in the data are compared with the guide rails 3, 4 and Vibration determining means 17 for determining the presence or absence of damage to control panel 8, automatic return means 14 for giving a return command to control panel 8 when the vibration determining means 17 determines that there is no damage, and damage determining means 18 When it is determined that there is any damage, or when the vibration determining means 17 determines that there is damage, the apparatus further includes a damage transmitting means 20 for damaging the guide rails 3 and 4 and the control panel 8.

Next, the operation of the earthquake sensing device 30 shown in FIG. 1 will be described with reference to the flowchart of FIG. When an earthquake occurs, as shown in the flowchart of FIG. 5, in step S1, the car 1, the counterweight 2 and the control panel 8
The acceleration output from the acceleration detecting means 5 attached to the sensor is taken into the earthquake detecting means 16. This earthquake detecting means 16
Is constantly monitoring whether an acceleration equal to or greater than the set value is output in step S2. If the acceleration is equal to or greater than the set value, a stop signal is sent to the control panel 8 via the elevator stop command circuit 15, and In step S3, the elevator is stopped immediately. At the same time, in step S4, the acceleration data of the car 1, the counterweight 2, and the control panel 8 at the time of the earthquake are stored in the buffer 12, and the calculation means 13
Then, the forces and displacements acting on the guide rails 3, 4 and the control panel 8 are calculated from the acceleration data already stored in the buffer 12.

Here, the stress acting on the guide rail 3 is determined by the force applied to the car 1 via the guide shoe 9 as shown in the cross sectional view and the vertical sectional view of the hoistway shown in FIGS. Acting on the guide rail 3 as a force of PX2 in the X direction and PY2 in the Y direction, this is the acceleration data α in the X direction detected by the acceleration detecting means 5 provided in the car 1.
It can be calculated from X1 and the acceleration data αY1 in the Y direction.
First, the stresses PX1 and PY1 acting on the car 1 can be expressed by the following equation (1).

PX1 (PY1) = m1 · αX1 (αY1) / g (1) In the equation (1), m1 represents the weight of the car 1 and g represents the gravitational acceleration. Stress σX acting in Y direction
And σY can be expressed by the following equation (2).

ΣX (σY) = 7 · β · PX2 (PY2) · L / (40 · ZX (ZY)) (2) In this equation (2), β is a load reduction rate, and L is a rail. The distance Z between the brackets 21 represents the section modulus of the guide rail 3. The force acting on each guide shoe 9 is X
In the direction, a value obtained by dividing PX into two components acts, and in the Y direction, a value obtained by dividing PX by four components acts. Therefore, PX2 and PY2 can be expressed by the following equations (3) and (4).

PX2 = PX1 / 2 (3) PY2 = PY1 / 4 (4) Accordingly, the guide rail 3 is obtained from the equations (2) to (4).
Can be expressed by equations (5) and (6).

ΣX = 7 · β · m1 · αX1 · L / (2 · 40 · ZX · g) (5) σY = 7 · β · m1 · αY1 · L / (4 · 40 · ZY · g) (6) Further, the displacement δX in the X direction and the displacement δY in the Y direction of the guide rail 3 can be expressed by Expression (7).

ΔX (δY) = 11 · β · PX2 (PY2) · L ³ / (960 · E · 1X (1Y)) (7) In this equation (7), E is the guide rail 3 The Young's modulus, I, indicates the second moment of area of the guide rail 3. From the equations (7), (3), and (4), the displacement of the guide rail 3 is calculated by the following equations (8), (9). ).

ΔX = 11 · β · m1 · αX1 · L ³ / (2,960 · E · I · g) (8) δY = 1 · β · m1 · αY1 · L ³ / (2 · 960 · E · I · g) (9) In Expressions (5), (6), (8), and (9), m
1, β, I, z, E, and L are known constants, which are stored in the arithmetic means 13 in advance.

The guide rail 4 of the counterweight 2
Can be obtained in a similar manner. FIG. 4 is a cross-sectional view of the control panel 8, and the control panel 8 receives the forces of PX3 and PZ3 during an earthquake. PX3
Can be obtained from the acceleration data αX2 and αZ2 in the X direction and the Z direction detected by the acceleration detecting means 5 by the equation (10).

PX3 (Pz3) = m2 · αX2 (αZ3) / g (10) The moment Me acting in the direction of tilting the control panel 8 can be expressed by the following equation (11).

Me = PX3 · H = m2 · αX2 · H / g (11) In the equation (11), m2 represents the weight of the control panel, and H represents the height of the center of gravity of the control panel. Further, the moment Mf acting in the direction of restoring the control panel can be expressed by Expression (12).

Mf = (m2−Pz3) · A + FR · B = (m2−m2 · αz2 / g) · A + FR · B (12) In the equation (12), A is from the side of the control panel 8. The distance to the center of gravity, B represents the width of the control panel 8, and FR represents the pull-out load of the anchor bolt 22 connecting the control panel 8 to the floor. M2, H, a, B, F in equations (11) and (12)
R is a known constant, which is stored in the calculating means 13 in advance.

The displacements δX and δY of the guide rail 3 obtained by the calculation means 13 as described above are compared with the allowable stress of the guide rail 3 stored in advance by the damage determination means 18 in step S5 shown in FIG. It is determined whether the guide rail 3 has been bent. Damage determination means 18
Compares the displacements δX, δY of the guide rail 3 obtained by the calculating means 13 with the allowance L of the guide rail 3 and the guide shoe 9 stored in advance, and determines whether the car 1 has come off from the guide rail 3. Is determined. Further, the damage judging means 18 compares the moment Me acting in the direction of tilting the control panel and the moment Mf acting in the direction of restoring the control panel, obtained by the calculating means 13, and if Me> Mf, the control panel 8 falls. It is determined. These steps S
If it is determined that the elevator is damaged beyond the allowable value by the comparison in step 5, the damage transmission unit 20 is determined in step S6.
To report the damage to the elevator maintenance company. Thereafter, in step S7, the elevator maintenance staff dispatched from the elevator maintenance company performs inspection and repair of the elevator.
During this time, if the elevator is moved, a secondary disaster may occur. Therefore, unless the elevator maintenance person manually resets the earthquake sensing device 30, the elevator is not moved. However, if the earthquake sensing device 30 is reset after the completion of the inspection and restoration of the elevator, the elevator can be returned to normal operation in step S8.

As described above, the force and displacement acting on the elevator equipment are calculated by the calculating means 13 from the acceleration data of the elevator equipment at the time of the earthquake, and the calculated displacement is compared with the allowable value of the elevator equipment to determine the damage to the elevator equipment. The damage determining means 18 is provided to determine that the elevator equipment has been damaged when the displacement obtained by the damage determining means 18 exceeds an allowable value, so that the damage determining means 18 causes damage to the elevator equipment. It is not necessary to confirm whether or not the elevator has been damaged by the human tactics for the earthquake determined not to have occurred, and the elevator can be quickly and efficiently restored.

Therefore, if the allowable value of the elevator equipment is larger than the calculated value in step S5, a command to return to normal operation from the automatic return means 14 shown in FIG. it can. However, in this case, in order to further improve the reliability, when it is determined that the stress and the displacement applied to the elevator equipment are within the range of the allowable value by the comparison in step S5, the flow is performed according to the flowchart shown in FIG. I have. In other words, even if it is determined that there is no damage to the elevator, there is a possibility that the elevator equipment may be damaged by a force less than the allowable value due to factors such as aging of the elevator equipment and the building, so it is assumed that the elevator equipment is not damaged again. I have to check. Specifically, in step S9, the automatic low-speed operation means 19 is operated, a command is given to the control panel 8 to operate the elevator at low speed, and in step S10, the car 1, the counterweight 2, and the control panel 8 are detected by the acceleration detection means 5. Is detected. The vibration data obtained in step S10 is compared with the vibration data stored in advance when the elevator is normal, by the vibration determining means 17 in the next step S11 to determine whether damage has occurred to the elevator equipment. I do. As a result, when it is determined that there is no damage to the elevator, the elevator is returned to normal operation by the automatic return means 14 in step S12. However, step S11
If it is determined in step S that the elevator is damaged, step S
At 13, the elevator is stopped by the elevator stop command circuit 15. Thereafter, in step S14, the damage is transmitted from the damage transmitting means 20 to the elevator maintenance company, and in step S15, the elevator maintenance staff dispatched from the elevator maintenance company completes the inspection and repair of the elevator, and then resets the earthquake sensing device. Then, in step S16, the elevator is returned to normal operation.

As described above, even when the damage judging means 18 judges that there is no damage, the damage is not generated because the automatic low-speed driving means 19 and the vibration judging means 17 for operating the elevator equipment to perform a self-diagnosis are provided. After reconfirming this, the elevator can be returned to normal operation, and it is possible to prevent the elevator from returning to normal operation when damage has actually occurred.

In the above-described embodiment, the control panel 8, the car 1, and the counterweight 2 installed in the machine room are used.
Although the acceleration detection means 5 is attached to each of these, and these are targeted for damage determination, the present invention is not limited to this, and other elevator devices such as traction machines can be selected for damage determination.

[0026]

As described above, the elevator earthquake sensing apparatus according to the present invention obtains the displacement of the elevator equipment from the acceleration detecting means attached to the elevator equipment, compares the displacement with the previously stored allowable value, and determines the allowable value. We have provided damage judgment means to determine that damage has occurred if it exceeds, so that damage judgment means can accurately judge the damage and notify the outside only when damage occurs in the elevator The elevator can be quickly and efficiently restored.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an elevator including an elevator earthquake sensing device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a hoistway showing stress acting on a guide rail.

FIG. 3 is a vertical sectional view of a hoistway showing stress acting on a guide rail.

FIG. 4 is a cross-sectional view of the control panel showing stress acting on the control panel.

FIG. 5 is a flowchart showing an operation of the elevator earthquake sensing device shown in FIG. 1;

FIG. 6 is another flowchart following the flowchart shown in FIG. 5;

[Explanation of symbols]

 5 Acceleration detecting means 13 Computing means 14 Automatic return means 16 Earthquake detecting means 17 Vibration judging means 18 Damage judging means 19 Automatic low speed driving means 20 Damage transmitting means

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Masamitsu Yamaki 1-6-6 Kandanishikicho, Chiyoda-ku, Tokyo Within Hitachi Building System Service Co., Ltd.

Claims (5)

[Claims] 1. An earthquake detection device for an elevator, which detects vibration of an earthquake and stops the elevator when the detected vibration is larger than a predetermined set value, wherein the earthquake is detected by acceleration detection means provided in the elevator equipment. Means, a calculating means for calculating the displacement acting on the elevator equipment at the time of the earthquake, and comparing the calculated displacement with the allowable value of the elevator equipment, and when the calculated displacement exceeds the allowable value, the elevator equipment And a damage determining means for determining that the vehicle has been damaged. 2. The apparatus according to claim 1, wherein said calculating means calculates a force and a displacement acting on said elevator equipment at the time of an earthquake, and said damage judging means calculates said force and said displacement and said elevator. An elevator seismic sensing device characterized by comparing allowable values of equipment. 3. An automatic low-speed driving means for performing low-speed operation of an elevator when the calculated force and displacement are determined to be within allowable values of the elevator equipment by the damage determining means. Vibration determining means for comparing the vibration of the elevator equipment measured by the acceleration detecting means during the low-speed operation by the acceleration detecting means with the vibration of the elevator during normal operation to determine whether the elevator equipment is damaged is provided. An elevator seismic sensing device characterized by the following. 4. The elevator according to claim 3, further comprising an automatic return unit that returns the elevator to a normal operation when the vibration determining unit determines that the elevator equipment is not damaged. apparatus. 5. The method according to claim 1, wherein
An elevator earthquake sensing device, further comprising: a damage transmitting means for notifying an outside when the damage determining means and the vibration determining means determine that the elevator equipment is damaged.