JP2009196807A - Elevator device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevator device capable of determining accurately whether any abnormality originating from swings of a rocking body exists or not. <P>SOLUTION: The main rope 11 to hang down a car 4 and a balance weight 5 is installed away from a terminal switch 16 to be equipment in a hoistway and a landing sensing plate 17. The distances from the main rope 11 to the terminal switch 16 and the landing sensing plate 17 vary with the main rope 11 rocking in the horizontal direction. A first contact sensor 22 is installed in the neighborhood of the terminal switch 16 while a second contact sensor 23 is arranged in the neighborhood of the landing sensing plate 17. The first and second contact sensors 22 and 23 sense whether a contact with the main rope 11 exists or not. A controller 7 of an elevator controls the operation of the elevator on the basis of the information given by the first and second contact sensors 22 and 23. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an elevator apparatus in which a car is raised and lowered in a hoistway.

  During an earthquake or strong wind, not only the building but also the rope that suspends the elevator car may sway. When the swinging width of the rope is large, there is a possibility that the rope is caught on the equipment installed in the hoistway or the equipment is damaged due to the collision of the rope.

  Conventionally, in order to prevent the rope of an elevator from being caught, after measuring the swing of the building, the rope's swing width is estimated based on the measured data, and the estimated rope swing width is used to estimate the possibility of the rope's catch. An elevator control operation device has been proposed. In such a conventional elevator, the movement of the car is stopped when the elevator control operation device determines that there is a possibility that the rope will be caught (see, for example, Patent Document 1).

JP 2007-131360 A

  However, in the conventional elevator control and operation apparatus, since the swing width of the rope is estimated by calculation, an error may occur from the actual swing width of the rope. Therefore, there is a possibility that the elevator control is set so as to forcibly stop the movement of the car, even if it is not the swing width that may cause the actual rope to be caught. As a result, even if the swing width of the rope is so small that there is no contact with the equipment and there is no need to stop the car, a control operation is performed to stop the car. End up.

  An object of the present invention is to solve the above-described problems, and an object of the present invention is to provide an elevator apparatus that can more accurately determine the presence / absence of an abnormality due to shaking of a rocking body.

  An elevator apparatus according to the present invention includes an apparatus in a hoistway provided in a hoistway, an oscillator that is arranged away from the hoistway apparatus, and changes a distance to the apparatus in the hoistway by swinging in a horizontal direction, the hoistway A contact detector that is disposed in the vicinity of the internal device and detects the presence or absence of contact received from the oscillator, and a control device that controls the operation of the elevator based on information from the contact detector are provided.

  In the elevator apparatus according to the present invention, a contact detector that detects the presence or absence of contact received from the oscillator is disposed in the hoistway, and the operation of the elevator is controlled by the control device based on information from the contact detector. For example, it is possible to more reliably detect whether or not the rocking body has reached the contact detector due to the rocking of the rocking body due to an earthquake or a strong wind. Therefore, it is possible to more reliably determine whether or not the rocking body is actually approaching the equipment in the hoistway. It is possible to determine the presence or absence of occurrence with higher accuracy.

Embodiment 1 FIG.
1 is a plan view showing an elevator apparatus according to Embodiment 1 of the present invention. FIG. 2 is a side view showing the elevator apparatus of FIG. In the figure, a pair of car guide rails 2 and a pair of counterweight guide rails 3 are installed in a hoistway 1. A car 4 is arranged between the car guide rails 2 so as to be movable up and down, and a counterweight 5 is arranged between the counterweight guide rails 3 so as to be raised and lowered.

  As shown in FIG. 2, a machine room 6 is provided at the upper part of the hoistway 1. In the machine room 6, a control device 7 that controls the operation of the elevator, a hoisting machine (drive device) 8 that is controlled by the control device 7, and a warp that is arranged at an interval from the hoisting machine 8. A car 9 is provided. The hoisting machine 8 and the deflecting wheel 9 are mounted on a machine base 10 fixed in the machine room 6.

  A plurality of main ropes 11 are continuously wound around the drive sheave of the hoisting machine 8 and the deflecting wheel 9. One end of the main rope 11 is connected to the upper part of the car 4, and the other end of the main rope 11 is connected to the upper part of the counterweight 5. The car 4 and the counterweight 5 are suspended by the main ropes 11. The car 4 and the counterweight 5 are raised and lowered in the hoistway 1 by the rotation of the drive sheave of the hoisting machine 8. When the car 4 and the counterweight 5 are raised and lowered, the car 4 is guided to the car guide rail 2, and the counterweight 5 is guided to the counterweight guide rail 3.

  The car 4 is provided with a car doorway 12 and a pair of car doors 13 for opening and closing the car doorway 12. Each car door 13 is moved toward the front of the car doorway 12 by a door driving device (not shown) mounted on the car 4. The car doorway 12 is opened and closed when the door 13 of each car is moved.

  On each floor of the building where the hoistway 1 is provided, a landing doorway 14 that connects the hoistway 1 and the hallway and a pair of landing doors 15 that open and close the hallway doorway 14 are provided. The doors 15 of the landings can be engaged with the doors 13 of the respective cars in the entrance direction of the landing doorway 14 when the car 4 is in a predetermined landing range. The landing doorway 14 is opened and closed when the door 15 of each landing is moved while being engaged with the door 13 of each car.

  In the vicinity of the terminal floor (the uppermost floor and the lowermost floor) in the hoistway 1, an end point switch (equipment in the hoistway) 16 for landing the car 4 so as not to go too far over the terminal floor is provided. Each floor in the hoistway 1 is provided with a landing detection plate (equipment in the hoistway) 17 arranged along the moving direction of the car 4. The car 4 is provided with a plate detector (not shown) for detecting the landing detection plate 17 when the car 4 is in a predetermined landing range. The landing sensor that detects whether or not the car 4 is in a predetermined landing range includes a landing detection plate 17 and a plate detector.

  A car emergency stop device (not shown) that applies a braking force to the car 4 by gripping the car guide rail 2 is mounted on the car 4. A car governor (not shown) is provided in the machine room 6. A car governor rope 18 connected to the car emergency stop device is wound around the car governor. When the speed of the car 4 becomes abnormally high, the car speed governor grips the car speed governor rope 18 to operate the car emergency stop device.

  The counterweight 5 is equipped with an emergency stop device (not shown) for a counterweight that applies a braking force to the counterweight 5 by gripping the counterweight guide rail 3. In the machine room 6, a speed governor (not shown) for a counterweight is provided. A balance weight governor rope 19 connected to an emergency stop device for the balance weight is wound around the balance weight governor. When the speed of the counterweight 5 becomes an abnormally high speed, the counterweight governor grips the counterweight governor rope 19 and the counterweight emergency stop device is operated.

  A control cable (moving cable) (not shown) that transmits information related to the operation of the elevator is connected between the car 4 and the control device 7. Between the car 4 and the counterweight 5, there is a compen- sion rope 20 for reducing the load received by the drive sheave of the hoisting machine 8 due to the weight difference between the car 4 side portion of the main rope 11 and the counterweight 5 side portion. It is connected. A part of the control cable and the compensation rope 20 are suspended in the hoistway 1.

  Each main rope 11, car governor rope 18, counterweight governor rope 19, control cable and compensation rope 20 include an end point switch 16 and a landing detection plate 17 by shaking in the horizontal direction. The rocking body (continuous body) varies in distance to the equipment in the hoistway.

  In the hoistway 1, as shown in FIG. 2, a plurality of contact sensor groups 21 are arranged at intervals in the vertical direction. The position of each contact sensor group 21 is set based on the natural frequency of the main rope 11 when the car 4 is at a predetermined position.

  Here, the natural frequency f [Hz] of the main rope 11 is expressed by equation (1).

  f = n / (2L) · √ (F / ρ) (1)

  F is the tension [N] of the main rope 11, ρ is the density [kg / m] of the main rope 11, and L is the length [m] of the main rope 11 between the drive sheave of the hoist 8 and the car 4. ], N is the order.

  From the expression (1), the natural frequency of the main rope 11 is specified by specifying the position of the car 4.

  FIG. 3 is a side view showing the elevator apparatus when the main rope 11 of FIG. 2 resonates in the secondary mode. FIG. 2 shows a state in which the main rope 11 is resonating in the primary mode. In this example, the position of each contact sensor group 21 is set based on the natural frequency of the main rope 11 when the car 4 is on the entrance floor (first floor).

  Moreover, the position of each contact sensor group 21 is set to the position of each antinode of the waveform when the main rope 11 is resonating in the primary mode (FIG. 2) and the secondary mode (FIG. 3).

  Each contact sensor group 21 includes first to fourth contact sensors (a plurality of contact detectors) 22 to 25 as shown in FIG. The first to fourth contact sensors 22 to 25 are arranged around the car 4 in the vertical projection plane of the hoistway 1. Further, the first to fourth contact sensors 22 to 25 are separated from the oscillating bodies (each main rope 11, the car governor rope 18, the counterweight governor rope 19, the control cable and the compen- sion rope 20). Has been placed. Furthermore, the first to fourth contact sensors 22 to 25 are oscillating bodies that swing in the hoistway 1 (each main rope 11, a governor rope 18 for a car, a governor rope 19 for a counterweight, a control cable, and a compensator. The presence or absence of contact received from at least one of the ropes 20 is detected.

  The first contact sensor 22 and the second contact sensor 23 are arranged so as to sandwich the car 4 in the front direction of the car 4 in the vertical projection plane of the hoistway 1. The second contact sensor 23 in each contact sensor group 21 is disposed in the vicinity of the landing detection plate 17. Further, the first contact sensors 22 in the uppermost and lowermost contact sensor groups 21 are arranged in the vicinity of the end point switch 16.

  The third contact sensor 24 is disposed between the car 4 and the counterweight 5 in the vertical projection plane of the hoistway 1. The third contact sensor 24 in each contact sensor group 21 is disposed in the vicinity of the bracket that supports each counterweight guide rail 3. The fourth contact sensor 25 is disposed between the car door 13 and the landing door 15 in the vertical projection plane of the hoistway 1. The fourth contact sensor 25 in each contact sensor group 21 is disposed in the vicinity of a landing threshold that is horizontally disposed below the landing entrance 14.

  In other words, the first to fourth contact sensors 22 to 25 are individually arranged in the vicinity of different devices in the hoistway.

  The 1st-4th contact sensors 22-25 are the 1st-4th wires 22a-25a extended horizontally in the hoistway 1, and the 1st end of the 1st-4th wires 22a-25a was connected. 1 to 4th tension sensors 22b to 25b.

  The first to fourth tension sensors 22b to 25b detect the presence or absence of contact of the oscillating body with the first to fourth wires 22a to 25a based on changes in tension of the first to fourth wires 22a to 25a, respectively. . The first to fourth contact sensors 22 to 25 perform detection operations by contact of the swinging body with respect to the first to fourth wires 22a to 25a, respectively.

  The first tension sensor 22 b is arranged in a position closer to the landing doorway 14 than one of the car guide rails 2 in the vertical projection plane of the hoistway 1. The first wire 22 a is passed through the back surface of one car guide rail 2 and the vicinity of the end point switch 16 in the vertical projection plane of the hoistway 1.

  The other end portion of the first wire 22 a is connected to a wire fastening portion 26 provided on a bracket that supports one counterweight guide rail 3. The first wire 22a reaches the wire fastening portion 26 after being wound around a pulley (not shown) installed in the hoistway 1 from the first tension sensor 22b.

  The second tension sensor 23 b is arranged in a position closer to the landing doorway 14 than the other car guide rail 2 in the vertical projection plane of the hoistway 1. The second wire 23 a passes through the back surface of the other car guide rail 2 and the vicinity of the landing detection plate 17 in the vertical projection plane of the hoistway 1.

  The other end portion of the second wire 23 a is connected to a wire fastening portion 26 provided on a bracket that supports the other counterweight guide rail 3. The second wire 23 a reaches the wire fastening portion 26 after being wound around the pulley (not shown) installed in the hoistway 1 from the second tension sensor 23 b.

  The third tension sensor 24 b is provided on a bracket that supports one counterweight guide rail 3. The third wire 24 a is passed between the car 4 and the counterweight 5 in the vertical projection plane of the hoistway 1. The other end portion of the third wire 24 a is connected to a wire fastening portion 26 provided on a bracket that supports the other counterweight guide rail 3. The third wire 24a is sequentially wound around a pair of pulleys (not shown) installed in the hoistway 1 from the third tension sensor 24b, and then reaches the wire fastening portion 26.

  The fourth tension sensor 25 b is disposed in a position closer to the landing doorway 14 than the other car guide rail 2 in the vertical projection plane of the hoistway 1. The fourth wire 25 a is passed between the car door 13 and the landing door 15 in the vertical projection plane of the hoistway 1. The other end portion of the fourth wire 25a is connected to a wire fastening portion 26 disposed at a position closer to the landing doorway 14 than the one car guide rail 2.

  The control device 7 controls the operation of the elevator based on information from the first to fourth contact sensors 22 to 25. That is, the control device 7 performs the normal operation of the elevator when the detection operations of all the first to fourth contact sensors 22 to 25 are stopped. Moreover, the control apparatus 7 performs the control operation which stops the cage | basket | car 4 to the nearest floor by performing the detection operation of at least any one of the 1st-4th contact sensors 22-25.

  Further, in the vicinity of the first and second contact sensors 22 and 23, a number of devices in the hoistway that are easily damaged such as the end point switch 16 and the landing detection plate 17 are provided. For this reason, when any of the first and second contact sensors 22 and 23 performs a detection operation, there is a possibility that the devices in the hoistway are damaged due to the contact with the rocking body. Therefore, when the control device 7 performs the control operation by the detection operation of at least one of the first and second contact sensors 22 and 23, the control device 7 keeps the control of the car 4 in a stopped state until a manual return operation is performed. Continue driving.

  On the other hand, the devices in the hoistway arranged in the vicinity of the third and fourth contact sensors 24, 25 (for example, brackets and landing thresholds) do not include those that are easily damaged. Therefore, when only the third and fourth contact sensors 24 and 25 perform the detection operation, there is a low possibility that the equipment in the hoistway is damaged. Therefore, when the control device 7 performs the control operation only by the detection operation of the third and fourth contact sensors 24, 25, the control device 7 cancels the control operation after a predetermined time has elapsed and automatically returns to the normal operation of the elevator. .

  That is, the control device 7 includes a case where the first and second contact sensors 22 and 23 detect contact of the swinging body and a case where the third and fourth contact sensors 24 and 25 detect contact of the swinging body. Do different driving. The control device 7 performs different operations depending on the contact sensor that detects the contact of the oscillator.

  A car shock absorber 27 disposed below the car 4 and a counterweight shock absorber 28 disposed below the counterweight 5 are installed at the bottom of the hoistway 1.

  Next, the operation will be described. When the swinging width of the swinging body is small and the swinging body is not in contact with the first to fourth contact sensors 22 to 25, the normal operation of the elevator is performed under the control of the control device 7.

  For example, when the main rope 11 is greatly shaken by the shaking of the building due to an earthquake or a strong wind, and the main rope 11 comes into contact with any of the first to fourth wires 22a to 25a, the main rope is received by the contact sensor that receives the contact from the main rope 11. Eleven touches are detected. Thereby, the operation of the elevator is controlled and the car 4 stops at the nearest floor. Thereafter, the car 4 stands by with the car doorway 12 and the landing doorway 14 closed, after the door is opened to drop the passenger.

  When the wire in contact with the main rope 11 is one of the first and second wires 22a and 23a, the control operation is continued while the car 4 is on standby until a return operation by a maintenance worker or the like is performed.

  On the other hand, when the wire in contact with the main rope 11 is one of the third and fourth wires 24a and 25a, the elevator operation is automatically returned from the control operation to the normal operation after a predetermined time has elapsed. To do.

  In such an elevator apparatus, the first to fourth contact sensors 22 to 25 that detect the presence or absence of contact received from the rocking body are arranged in the hoistway 1, and the information from the first to fourth contact sensors 22 to 25 is used. Since the operation of the elevator is controlled by the control device 7 based on this, it is more reliably detected whether or not the rocking body has reached the first to fourth contact sensors 22 to 25 due to the rocking of the rocking body due to, for example, an earthquake or a strong wind. can do. Therefore, it is possible to more reliably determine whether or not the oscillating body is actually approaching the equipment in the hoistway. For example, abnormalities in the elevator caused by shaking of the oscillating body, such as breakage of the equipment in the hoistway or catching of the oscillating body. It is possible to determine the presence or absence of occurrence with higher accuracy.

  The first to fourth contact sensors 22 to 25 are based on changes in tension of the first to fourth wires 22a to 25a and the first to fourth wires 22a to 25a stretched in the hoistway 1. Since it has 1st-4th tension sensors 22b-25b which detect the presence or absence of the contact with the 1st-4th wires 22a-25a by an oscillating body, the presence or absence of the contact of an oscillating body is simple, and It can be detected in a wide range.

  Further, since the control device 7 performs different operations according to the contact sensors that have detected the contact of the rocking body, it is possible to perform an operation according to the level of an abnormality that occurs due to the rocking of the rocking body, and the operation efficiency of the elevator Can be suppressed. That is, since the ease of breakage and the ease of catching of the swinging body are different for each device in the hoistway, contact sensors (first and second contact sensors) arranged in the vicinity of the device that is easily damaged or the swinging body is easily caught. 22 and 23) perform a detection operation When a contact sensor (third and fourth contact sensors 24 and 25) arranged in the vicinity of a device that has a high abnormality level and is not easily damaged performs a detection operation. It can be said that the level of abnormality is low. Therefore, when the level of abnormality is low, the car 4 can be temporarily stopped and then automatically returned to normal operation after a predetermined time has elapsed, and a decrease in elevator operation efficiency can be suppressed.

  Moreover, since the vertical position of each contact sensor group 21 is set based on the natural frequency of the oscillator, the contact sensor group 21 can be arranged at the position of the antinode of the waveform when the oscillator resonates. it can. Therefore, the contact sensor group 21 can be arranged at a position where the swinging body is most likely to approach the hoistway device, and it is possible to more accurately determine whether or not an elevator abnormality has occurred due to swinging of the swinging body. .

  In the above example, the first to fourth contact sensors 22 to 25 detect the presence or absence of contact of the oscillating body based on the change in tension of the first to fourth wires 22a to 25a. However, the first to fourth contact sensors 22 to 25 include a rod-shaped body disposed in the hoistway 1 and a displacement sensor that detects the presence or absence of contact of the rocking body based on the presence or absence of the displacement of the rod-shaped body. You may do it. In this case, the rod-shaped body is disposed horizontally.

Embodiment 2. FIG.
In the first embodiment, the control device 7 controls the operation of the elevator based on information from the first to fourth contact sensors 22 to 25. However, the building shake measurement device measures the shake of the building. May be combined with information from the first to fourth contact sensors 22 to 25 to control the operation of the elevator.

  That is, in the second embodiment, the building provided with the hoistway 1 is provided with a building shake measuring device that measures the shake of the building. The control device 7 can estimate the swing width of the swinging body by calculation based on information from the building swing measuring device. Further, the control device 7 controls the operation of the elevator based on the estimated swing width information and the information from the first to fourth contact sensors 22 to 25.

  Specifically, the control device 7 compares the swing width estimated based on information from the building shake measuring device with a preset threshold value, thereby moving the car 4 at a normal speed, and the car. One of the low speed operation in which 4 is moved at a speed lower than the normal speed is selected. That is, the control device 7 performs normal operation when the estimated amplitude is smaller than the threshold, and performs low speed operation when the estimated amplitude reaches the threshold.

  The control device 7 selects either a normal operation or a control operation for stopping the car 4 at the nearest floor based on the presence or absence of the detection operation of the first to fourth contact sensors 22 to 25. That is, the control device 7 performs normal operation when all the detection operations of the first to fourth contact sensors 22 to 25 are stopped, and at least one of the first to fourth contact sensors 22 to 25 detects Control operation is performed when the operation is performed.

  Other configurations and operations are the same as those in the first embodiment.

  In such an elevator apparatus, information on the swing width of the swinging body estimated based on information from the building swing measuring apparatus and information on whether or not the swinging body is in contact with the first to fourth contact sensors 22-25. Based on this, since the operation of the elevator is controlled, it is possible to perform the operation according to the swing width of the rocking body even when the first to fourth contact sensors 22 to 25 are not in contact. Therefore, it is possible not only to determine whether or not an abnormality has occurred due to shaking of the rocking body, but also to suppress the occurrence of abnormality itself due to shaking of the rocking body.

Embodiment 3 FIG.
4 is a plan view showing an elevator apparatus according to Embodiment 3 of the present invention. In the figure, each contact sensor group 21 has only a first contact sensor 22 and a second contact sensor 23, and does not include a third contact sensor 24 and a fourth contact sensor 25. That is, the contact sensors (third and fourth contact sensors 24, 25) are not arranged in the vicinity of the equipment in the hoistway where the possibility of damage due to the contact of the rocking body is low. The contact sensors (first and second contact sensors 22 and 23) are arranged only in the vicinity of the equipment in the hoistway where there is a high possibility of occurrence or catching of the oscillator.

  The control device 7 performs a control operation for stopping the car 4 at the nearest floor when at least one of the detection operations of the first and second contact sensors 22 and 23 is performed. The control operation is continued under the control of the control device 7 until a manual return operation by a maintenance worker or the like is performed. Other configurations and operations are the same as those in the first embodiment.

  In such an elevator apparatus, since the contact sensors are arranged only in the vicinity of the equipment in the hoistway where there is a high possibility of occurrence of an abnormality due to the swinging of the swinging body, the number of contact sensors can be reduced, and the manufacture Cost can be reduced.

  In each of the above embodiments, each contact sensor group 21 is arranged at the position of the antinode of the waveform when the main rope 11 resonates. May be further added near the equipment in the hoistway.

  Moreover, in each said embodiment, although the position of each contact sensor group 21 is set based on the natural frequency of the main rope 11, since it should just be the natural frequency of a rocking | fluctuation body, for example, the Compen rope 20 or The position of each contact sensor group 21 may be set based on the natural frequency of the car governor rope 18 or the like.

  Moreover, in each said embodiment, although this invention is applied to the elevator apparatus by which the suspension system of the cage | basket | car 4 and the counterweight 5 was made into the 1: 1 roping system, the cage | basket | car suspension vehicle is provided in the cage | basket 4 The present invention may also be applied to an elevator apparatus in which the suspension system of the car 4 and the counterweight 5 is a 2: 1 roping system by providing the counterweight 5 with a counterweight suspension vehicle.

1 is a plan view showing an elevator apparatus according to Embodiment 1 of the present invention. It is a side view which shows the elevator apparatus of FIG. It is a side view which shows an elevator apparatus when the main rope of FIG. 2 is resonating in secondary mode. It is a top view which shows the elevator apparatus by Embodiment 3 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Hoistway, 7 Control apparatus, 11 Main rope (oscillator), 16 End switch (equipment in hoistway), 17 Landing detection plate (equipment in hoistway), 18 Speed governor rope for car (oscillator) , 19 Balance weight governor rope (oscillator), 20 Compen rope, 22 First contact sensor (contact detector), 23 Second contact sensor (contact detector), 24 Third contact sensor (contact detector) ), 25 Fourth contact sensor (contact detector).

Claims (5)

Equipment in the hoistway provided in the hoistway,
An oscillator that is arranged away from the hoistway device and changes the distance to the hoistway device by swinging in a horizontal direction,
A contact detector disposed in the vicinity of the hoistway device and detecting the presence or absence of contact received from the rocking body; and a control device for controlling the operation of the elevator based on information from the contact detector. An elevator apparatus characterized by that.   The contact detector includes: a linear body stretched in the hoistway; and a tension sensor that detects presence or absence of contact of the rocking body with the linear body based on a change in tension of the linear body. The elevator apparatus according to claim 1, comprising: In the hoistway, there are provided a plurality of contact detectors individually arranged in the vicinity of different hoistway devices,
The elevator apparatus according to claim 1 or 2, wherein the operation of the elevator under the control of the control device is different from each other depending on the contact detector that detects the contact of the rocking body. In the hoistway, a plurality of the contact detectors are provided that are spaced apart from each other in the vertical direction.
The elevator apparatus according to any one of claims 1 to 3, wherein the position of the contact detector in the vertical direction is set based on a natural frequency of the oscillator.   The control device estimates a swing width of the swinging body based on information from a building swing measuring device that measures the swing of the building provided with the hoistway, and information on the estimated swing width and the contact detection The elevator apparatus according to any one of claims 1 to 4, wherein operation of the elevator is controlled on the basis of information on whether or not the rocking body is in contact with a unit.

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