JP7364129B2 - Measuring method and measuring device - Google Patents

Description

The present disclosure relates to a method for measuring rope tension and a measuring device used in the method.

Patent Document 1 describes a device for measuring the frequency of vibrations generated in a rope. The device described in Patent Document 1 includes a photographing device for photographing a rope. The frequency of vibrations generated in the rope is measured based on the video captured by the camera. The tension of the rope can also be determined from the measured frequency.

Japanese Patent Application Publication No. 2020-40810

The elevator car is suspended in the hoistway by multiple ropes. A coupling device may be attached to the plurality of ropes. The connecting device is attached to the plurality of ropes so as to sandwich the plurality of ropes from both sides.

In an elevator system equipped with a coupling device, when vibration occurs in one rope, the vibration generated in the rope is transmitted to other ropes via the coupling device. That is, when vibrations are generated in one rope for tension measurement, vibrations are generated in other ropes. Vibrations generated in the other rope are transmitted to the rope via the coupling device. Therefore, vibrations transmitted to the rope via the coupling device are measured as noise.

For these reasons, conventionally, when measuring tension, the coupling device was removed from the rope before vibrations were generated in the rope. However, since it is difficult to attach and detach the coupling device in a short time, there is a problem in that a long time is required to measure the tension.

The present disclosure has been made to solve the problems described above. The purpose of the present disclosure is to provide a measurement method that can reduce the time required to measure rope tension. Another object of the present disclosure is to provide a measuring device for reducing the time required to measure rope tension.

A measuring method according to the present disclosure is a method of measuring the tension of a rope in an elevator device in which a connecting device is attached to a plurality of ropes for suspending a car so as to sandwich the plurality of ropes from both sides. The method includes a first detection step of detecting the attitude of the coupling device, and after the first detection step, a fixing device is attached to the coupling device, and a fixing device of the hoistway in which the car moves or a movable body moving in the hoistway is attached. A first fixing step of fixing the coupling device to one of the fixing members via a fixing device, a second detection step of detecting the posture of the coupling device after the first fixing step, and a detection step of detecting the posture of the coupling device on one side of the fixing member. a first determination step of determining whether the change in the posture of the coupling device is within a permissible range based on the posture and the posture detected in the second detection step; If it is determined that the tension is present, the method includes a measuring step of measuring the tension of the ropes included in the plurality of ropes.

A measurement device according to the present disclosure is used to measure the tension of a rope in an elevator device in which a connecting device is attached to a plurality of ropes for suspending a car so as to sandwich the plurality of ropes from both sides. It is a device. The measurement device includes a sensor for detecting the attitude of the coupling device, a first mounting member attached to the coupling device, and a fixing member of a hoistway in which a car moves or a fixing member of a movable body moving in the hoistway. It includes a second attachment member to be attached, and an adjustment device provided on the first attachment member and the second attachment member. The adjustment device includes a displacement mechanism for rotating the first mounting member around a first axis and a second axis perpendicular to the first axis, and a blocking mechanism for preventing displacement of the first mounting member by the displacement mechanism. , is provided.

According to the present disclosure, the time required to measure rope tension can be shortened.

It is a figure showing an example of an elevator device. 2 is an enlarged view of part A in FIG. 1. FIG. 3 is a diagram showing a cross section taken along line BB in FIG. 2. FIG. It is a figure which shows the example of the frequency measured by giving vibration to a rope. 5 is a flowchart showing a method for measuring tension in Embodiment 1. FIG. It is a figure for explaining the measuring method of tension. It is a figure for explaining the measuring method of tension. It is a figure for explaining the measuring method of tension. It is a figure for explaining the measuring method of tension. It is a figure showing other examples of a measurement device. 11 is a diagram showing a cross section taken along line EE in FIG. 10. FIG. It is a figure which shows the other example of the measuring device 21. 13 is a diagram showing a cross section taken along the line FF in FIG. 12. FIG.

A detailed explanation will be given below with reference to the drawings. Duplicate explanations will be simplified or omitted as appropriate. In each figure, the same reference numerals indicate the same or corresponding parts.

Embodiment 1.
FIG. 1 is a diagram showing an example of an elevator device. The elevator device includes a car 1 and a counterweight 2. The car 1 moves up and down the hoistway 3. The counterweight 2 moves up and down the hoistway 3. The car 1 and the counterweight 2 are examples of moving bodies that move on the hoistway 3. The hoistway 3 is a space formed in a building and extending vertically. A car 1 and a counterweight 2 are suspended in a hoistway 3 by a rope 4. The rope 4 is, for example, a wire rope. FIG. 1 shows an example of a 1:1 roping type elevator system.

The rope 4 is wound around a hoist 5. The car 1 is driven by a hoist 5. The control device 6 controls the hoisting machine 5. That is, the movement of the car 1 is controlled by the control device 6. FIG. 1 shows an example in which a hoist 5 and a control device 6 are provided in a machine room 7 above a hoistway 3. The hoist 5 and the control device 6 may be provided in the hoistway 3. The hoist 5 may be provided at the top of the hoistway 3 or may be provided in a pit of the hoistway 3.

The car 1 includes a car chamber 8, a door 9, a car frame 10, and a guide member 11. The cage 8 forms a space for passengers to ride. The door 9 opens and closes an entrance formed in the car room 8. The car frame 10 supports the car compartment 8. The car frame 10 is arranged so as to surround the car chamber 8 at the top, bottom, left and right. The guide member 11 is provided on the car frame 10.

A pair of guide rails 12 for the car 1 are provided in the hoistway 3. The guide rail 12 is arranged vertically from the pit to the top of the hoistway 3. The movement of the car 1 is guided by the guide member 11 facing or contacting the guide rail 12. The guide member 11 is, for example, a guide shoe. The guide member 11 may be a guide roller.

The counterweight 2 includes an adjustment weight 13, a weight frame 14, and a guide member 15. The adjustment weight 13 is a weight for adjusting the overall weight of the counterweight 2. The adjustment weight 13 is supported by a weight frame 14. The weight frame 14 is arranged to surround the adjustment weight 13 on the top, bottom, left and right. The guide member 15 is provided on the weight frame 14.

A pair of guide rails 16 for the counterweight 2 are provided in the hoistway 3. The guide rail 16 is arranged vertically from the pit to the top of the hoistway 3. The movement of the counterweight 2 is guided by the guide member 15 facing or contacting the guide rail 16. The guide member 15 is, for example, a guide shoe. The guide member 15 may be a guide roller.

FIG. 2 is an enlarged view of section A in FIG. FIG. 3 is a diagram showing a cross section taken along line BB in FIG. In the example shown in this embodiment, the car 1 is suspended by a plurality of ropes 4. Each rope 4 is connected to the car frame 10 via a rope shackle 17. A connecting device 18 is attached to the plurality of ropes 4 .

The coupling device 18 includes two pressing members 19 and 20, as shown in FIG. The connecting device 18 is attached to the plurality of ropes 4 by sandwiching the plurality of ropes 4 from both sides with the pressing members 19 and 20. Preferably, a plurality of bolts are used to fix the pressing members 19 and 20. A groove 19a for arranging the rope 4 is formed in the pressing member 19. Similarly, a groove 20a for arranging the rope 4 is formed in the pressing member 20. The upwardly facing surface 18a of the coupling device 18 is perpendicular to the grooves 19a and 20a.

In the elevator system, maintenance personnel measure the tension of the rope 4 during periodic inspections and the like. To measure the tension, the maintenance worker applies vibration to the rope 4 and measures the frequency. Maintenance personnel obtain the tension from the measured frequency. FIG. 4 is a diagram showing an example of frequencies measured by applying vibration to the rope 4. The solid line shown in FIG. 4 shows an example of the frequency measured when the middle rope 4 of the five shown in FIG. 2 is vibrated. In the following, when it is necessary to distinguish the rope 4 from other ropes 4, the reference numeral 4a is substituted for the reference numeral 4.

As described above, in the elevator system including the coupling device 18, when vibration occurs in one rope 4, the vibration generated in the rope 4 is transmitted to the other ropes 4 via the coupling device 18. For example, when vibration occurs in the rope 4a, the vibration generated in the rope 4a is transmitted to other ropes 4 via the coupling device 18. The vibrations generated in the other ropes 4 are transmitted to the rope 4a via the coupling device 18. Therefore, when the frequency of vibration is measured in the state shown in FIG. 2, vibrations transmitted from other ropes 4 will be detected as noise, as shown by symbols C and D in FIG.

In the following, with reference also to FIGS. 5 to 9, a method of measuring the tension of the rope 4 using the measuring device 21 in order to reduce the noise indicated by symbols C and D in FIG. 4 will be described. FIG. 5 is a flowchart showing a method for measuring tension in the first embodiment. 6 to 9 are diagrams for explaining a method for measuring tension. The measuring device 21 is equipped with a sensor 22 and a fixing device 23 .

The maintenance worker first moves from the landing to the top of the car 1. When the maintenance worker moves to the top of the car 1, he detects the attitude of the coupling device 18 attached to the rope 4 (S101). In the detection step shown in S101, for example, as shown in FIG. 6, a sensor 22 for detecting the attitude of the coupling device 18 is placed on the surface 18a of the coupling device 18. The sensor 22 is, for example, a spirit level. In such a case, the sensor 22 detects the attachment angle α of the coupling device 18 with respect to the horizontal plane as the attitude of the coupling device 18. Specifically, in the example shown in FIG. 6, the angle of the surface 18a with respect to the horizontal plane is detected by the sensor 22.

Next, the maintenance person attaches the fixing device 23 to the coupling device 18 (S102). 7 and 8 show an example in which the fixing device 23 is attached to the coupling device 18 in S102. FIG. 7 is a diagram corresponding to FIG. 2. FIG. 8 is a diagram corresponding to FIG. 3.

As shown in FIGS. 7 and 8, the fixing device 23 includes a mounting member 24, a mounting member 25, and an adjustment device 26. Attachment member 24 is attached to coupling device 18 . In the example shown in FIGS. 7 and 8, the mounting member 24 is a rectangular parallelepiped-shaped member. The mounting member 24 is attached to the coupling device 18 using a bolt 27 passed through the elongated hole 24a while in surface contact with the surface 18a. The attachment member 24 may be attached to the coupling device 18 using a clamp, a magnet, a fitting mechanism, or the like.

Next, the maintenance person attaches the fixing device 23 to the fixing member 28 (S103). As an example, the fixed member 28 is a member fixed to the hoistway 3. The fixing member 28 may be a construction beam, a guide rail 12, or a bracket fixed to the guide rail 12. As another example, the fixing member 28 is a member provided in the car 1. The fixing member 28 may be the car frame 10, the car compartment 8, or a bracket extending from the car compartment 8.

In S<b>103 , the maintenance person attaches the attachment member 25 to the fixing member 28 while adjusting the position and orientation of the attachment member 25 using the adjustment device 26 . The attachment member 25 may be attached to the fixing member 28 using a clamp, a magnet, a fitting mechanism, or the like.

Adjustment device 26 is provided between mounting member 24 and mounting member 25 . The adjustment device 26 includes a displacement mechanism 29 for rotating the attachment member 24 about a plurality of axes, and a blocking mechanism 30 for preventing the displacement mechanism 29 from displacing the attachment member 24 .

For example, the displacement mechanism 29 is rotatable about each of the X-axis, Y-axis, and Z-axis shown in FIGS. 7 and 8. The X-axis is perpendicular to each of the Y-axis and the Z-axis. The Y-axis is orthogonal to the Z-axis. By operating the displacement mechanism 29, maintenance personnel can change the orientation of the mounting member 24 with respect to the mounting member 25 to any direction. Further, the maintenance personnel can prevent the displacement mechanism 29 from displacing the mounting member 24 by performing a specific operation on the blocking mechanism 30. That is, when a specific operation is performed on the blocking mechanism 30, the orientation of the attachment member 24 with respect to the attachment member 25 is fixed to the orientation at that time.

After attaching the attachment member 25 to the fixing member 28, the maintenance person operates the blocking mechanism 30 to fix the orientation of the attachment member 24 with respect to the attachment member 25. Thereby, the coupling device 18 is fixed to the fixing member 28 via the fixing device 23.

Note that the step shown in S103 may be performed before the step shown in S102. That is, the attachment member 25 may be attached to the fixing member 28 before the attachment member 24 is attached to the coupling device 18. The step shown in S103 may be performed in parallel with the step shown in S102. That is, the maintenance person may attach the attachment member 24 to the coupling device 18 while attaching the attachment member 25 to the fixing member 28 .

After the fixing steps shown in S102 and S103, the maintenance worker detects the attitude of the coupling device 18 again using the sensor 22 (S104). The detection step shown in S104 is similar to the detection step shown in S101.

When the coupling device 18 is fixed to the fixing member 28 via the fixing device 23, the posture of the coupling device 18 changes. FIG. 9 shows an example in which the installation angle of the coupling device 18 is increased by Δ before and after the fixing device 23 is attached. When the installation angle of the connecting device 18 changes, a tensile force or compressive force acts on the rope 4, and the tension of the rope 4 changes. Therefore, if the installation angle of the connecting device 18 changes greatly, it becomes impossible to accurately measure the tension of the rope 4.

Therefore, after the detection step shown in S104, the maintenance person determines whether the change in the posture of the coupling device 18 is within an allowable range (S105). The determination step shown in S105 is performed based on the attitude of the coupling device 18 detected in S101 and the attitude of the coupling device 18 detected in S104. The permissible range is set in advance. For example, if the change Δ in the installation angle of the coupling device 18 is not within the allowable range, the determination in S105 is No. If the change Δ is within the allowable range, it is determined Yes in S105.

If it is not determined that the change in the attitude of the coupling device 18 is within the allowable range (No in S105), the maintenance person fixes the fixing device 23 again and detects the attitude of the coupling device 18 again. Specifically, if the maintenance person makes a negative determination in S105, he or she removes the fixing device 23 from the coupling device 18 (S106). In the removal step shown in S106, the fixing device 23 may be removed from both the coupling device 18 and the fixing member 28. After that, the maintenance person performs the steps shown in S101 to S105 again.

That is, after the removal process shown in S106, the maintenance person detects the attitude of the coupling device 18 using the sensor 22 (S101). After the detection step shown in S101, the maintenance person attaches the fixing device 23 to the coupling device 18 (S102). If the fixing device 23 has also been removed from the fixing member 28 in the removal process shown in S106, the maintenance person attaches the fixing device 23 to the fixing member 28 (S103). Thereby, the coupling device 18 is fixed to the fixing member 28 via the fixing device 23. When the coupling device 18 is fixed again to the fixing member 28 via the fixing device 23, the maintenance person detects the attitude of the coupling device 18 using the sensor 22 (S104). After that, the maintenance person determines whether the change in the posture of the coupling device 18 is within an allowable range (S105). The second determination step shown in S105 is performed based on the attitude of the coupling device 18 detected in S101 and the attitude of the coupling device 18 detected in S104 after the determination is No in S105.

If it is determined that the change in the posture of the coupling device 18 is within the allowable range (Yes in S105), the maintenance worker measures the tension in the rope 4 (S107). Specifically, in the measurement step shown in S107, the maintenance worker first vibrates the rope 4 by applying an external force to the rope 4. The maintenance worker measures the frequency of vibration generated in the rope 4 and obtains the tension of the rope 4 from the measured frequency.

In the example shown in this embodiment, when measuring the frequency of vibration generated in the rope 4, the coupling device 18 is fixed to the fixing member 28 via the fixing device 23. Therefore, vibrations generated in the rope 4 can be prevented from being transmitted to other ropes 4 via the coupling device 18. Further, it is also possible to suppress vibrations generated in other ropes 4 from being transmitted to the ropes via the coupling device 18.

The broken line shown in FIG. 4 indicates the frequency of vibration generated in the rope 4a when the coupling device 18 is fixed to the fixing member 28 via the fixing device 23. As shown in FIG. 4, by using the measuring device 21 when measuring the tension of the rope 4, noise during measurement can be significantly reduced. Therefore, there is no need to remove the coupling device 18 from the rope 4 when measuring the tension in the rope 4. In the example shown in this embodiment, the time required to measure the tension of the rope 4 can be shortened.

FIG. 10 is a diagram showing another example of the measuring device 21. FIG. 11 is a diagram showing a cross section taken along line EE in FIG. FIG. 10 is a diagram corresponding to FIG. 2. FIG. 11 is a diagram corresponding to FIG. 3. In the measuring device 21 shown in FIGS. 10 and 11, the displacement mechanism 29 and the blocking mechanism 30 of the adjusting device 26 are different from the example described above.

The adjusting device 26 shown in FIGS. 10 and 11 includes an adjusting member 31, an adjusting member 32, a shaft 33, and a shaft 34 as the displacement mechanism 29. The adjustment device 26 includes a bolt 35 and a bolt 36 as the blocking mechanism 30.

The adjustment member 31 is a block-shaped member. The adjustment member 31 is provided on the attachment member 25. The adjustment member 31 is not displaced relative to the mounting member 25. The adjustment member 32 is a block-shaped member. The adjustment member 32 is provided to the adjustment member 31 via a shaft 33. The shaft 33 is provided on the adjustment member 31. The shaft 33 is not displaced relative to the adjustment member 31. The axis 33 is arranged along the X axis. Adjusting member 32 is movable about axis 33 with respect to adjusting member 31 .

The attachment member 24 is provided on the adjustment member 32 via a shaft 34 . The shaft 34 is provided on the adjustment member 32. The shaft 34 is not displaced relative to the adjustment member 32. Axis 34 is arranged along the Y-axis. The attachment member 24 is displaceable about an axis 34 with respect to the adjustment member 32 . In the example shown in FIGS. 10 and 11, the adjusting device 26 rotates the mounting member 24 with respect to the mounting member 25 around the X-axis and the Y-axis.

The bolt 35 is attached to a screw hole formed in the adjustment member 32. The tip of the bolt 35 faces the shaft 33. Therefore, when the bolt 35 is screwed in, the tip of the bolt 35 is pressed against the shaft 33. This prevents displacement of the adjustment member 32 with respect to the adjustment member 31. Similarly, the bolt 36 is attached to a threaded hole formed in the attachment member 24. The tip of the bolt 36 faces the shaft 34. Therefore, when the bolt 36 is screwed in, the tip of the bolt 36 is pressed against the shaft 34. This prevents the mounting member 24 from being displaced relative to the adjustment member 32.

According to the example shown in FIGS. 10 and 11, the measuring device 21 can be realized with an inexpensive configuration.

FIG. 12 is a diagram showing another example of the measuring device 21. FIG. 13 is a diagram showing a cross section taken along line FF in FIG. 12. In the measuring device 21 shown in FIGS. 12 and 13, the sensor 22 is different from the example described above.

The measurement device 21 shown in FIGS. 12 and 13 includes two laser displacement meters 22a and 22b as sensors 22. The laser displacement meter 22a is attached to the fixing member 37 disposed above the coupling device 18 in the detection step shown in S101. Similarly, the laser displacement meter 22b is attached to the fixing member 38 disposed above the coupling device 18 in the detection step shown in S101.

The fixing member 37 and the fixing member 38 are members fixed to the hoistway 3 or provided to the car 1. The fixing member 37 and the fixing member 38 may be the same member. In the detection step, light is irradiated from above onto the surface 18a of the coupling device 18 from the laser displacement meter 22a. In FIG. 13, the position where the light from the laser displacement meter 22a is irradiated is indicated by the symbol G. FIG. 13 shows a preferred example in which one end of the surface 18a is irradiated with light from the laser displacement meter 22a.

Similarly, in the detection step, light is irradiated from above onto the surface 18a of the coupling device 18 from the laser displacement meter 22b. In FIG. 13, the position where the light from the laser displacement meter 22b is irradiated is indicated by the symbol H. FIG. 13 shows a preferred example in which the light from the laser displacement meter 22b is irradiated onto the other end of the surface 18a. In the example shown in FIG. 13, the Y-axis coordinates of position G and the Y-axis coordinate of position H are the same. The ropes 4 are lined up along the X axis.

Also in the example shown in FIGS. 12 and 13, the maintenance personnel determines in S105 whether the change in the posture of the coupling device 18 is within an allowable range. In such a case, the determination step shown in S105 is performed based on the results detected by both laser displacement meters 22a and 22b in S101 and the results detected by both laser displacement meters 22a and 22b in S104.

As another example, a dial gauge, a steel gauge, or the like may be used as the sensor 22.

In this embodiment, a method of measuring the tension of the rope 4 with the fixing device 23 attached to the connecting device 18 has been described. The connecting device 18 pinches the plurality of ropes 4 from both sides just above the car frame 10, and integrates the plurality of ropes 4. A device similar to coupling device 18 is also provided directly above weight frame 14 . FIG. 1 shows an example in which a connecting device 39 similar to the connecting device 18 is provided immediately above the weight frame 14.

The maintenance personnel may measure the tension in the rope 4 by using the measuring device 21 on the coupling device 39 in a manner similar to that described above. In such a case, the fixing member 28 to which the fixing device 23 is attached may be the guide rail 16 or a bracket fixed to the guide rail 16. Further, the fixing member 28 may be a member provided on the counterweight 2. In such a case, the fixing member 28 may be the adjustment weight 13, the weight frame 14, or a bracket extending from the weight frame 14.

As mentioned above, FIG. 1 shows a 1:1 roping type elevator system. A device similar to coupling device 18 is also used in a 2:1 roping type elevator system. The maintenance person may measure the tension of the rope 4 by using the measuring device 21 for the device in a manner similar to the method described above. In such a case, the fixing member 28 may be a construction beam, the guide rail 12, a bracket fixed to the guide rail 12, the guide rail 16, or a bracket fixed to the guide rail 16.

The measuring method according to the present disclosure can be used to measure the tension of a rope to which a connecting device is attached.

1 car, 2 counterweight, 3 hoistway, 4 rope, 5 hoisting machine, 6 control device, 7 machine room, 8 car room, 9 door, 10 car frame, 11 guide member, 12 guide rail, 13 adjustment weight, 14 weight frame, 15 guide member, 16 guide rail, 17 rope shackle, 18 coupling device, 18a surface, 19-20 pressing member, 19a-20a groove, 21 measuring device, 22 sensor, 22a-22b laser displacement meter, 23 fixing device, 24 attachment member, 24a long hole, 25 attachment member, 26 adjustment device, 27 bolt, 28 fixation member, 29 displacement mechanism, 30 blocking mechanism, 31-32 adjustment member, 33-34 shaft, 35-36 bolt, 37-38 Fixing member, 39 Connecting device

Claims (6)

A method for measuring the tension of a rope in an elevator device in which a connecting device is attached to a plurality of ropes for suspending a car so as to sandwich the plurality of ropes from both sides, the method comprising:
a first detection step of detecting the attitude of the coupling device;
After the first detection step, a fixing device is attached to the coupling device, and the fixing device is attached to either a fixing member of a hoistway in which the car moves or a fixing member of a movable body moving in the hoistway, via the fixing device. a first fixing step of fixing the coupling device;
a second detection step of detecting the posture of the coupling device after the first fixing step;
a first determination step of determining whether a change in the posture of the coupling device is within a permissible range based on the posture detected in the first detection step and the posture detected in the second detection step;
a measuring step of measuring the tension of a rope included in the plurality of ropes when it is determined that the change in the posture of the connecting device is within the permissible range;
A measurement method with If the change in the posture of the connecting device is not determined to be within the allowable range in the first determining step, a removing step of removing the fixing device from the connecting device;
a third detection step of detecting the attitude of the coupling device after the removal step;
After the third detection step, a second fixing step of fixing the connecting device to the one side via the fixing device;
a fourth detection step of detecting the attitude of the coupling device after the second fixing step;
a second determination step of determining whether a change in the posture of the coupling device is within an allowable range based on the posture detected in the third detection step and the posture detected in the fourth detection step;
The measuring method according to claim 1, further comprising: 3. The measuring method according to claim 1, wherein the attachment angle of the coupling device with respect to a horizontal plane is detected as the attitude of the coupling device. A measuring device used to measure the tension of a rope in an elevator device in which a connecting device is attached to a plurality of ropes for suspending a car so as to sandwich the plurality of ropes from both sides, the measuring device comprising:
a sensor for detecting the attitude of the coupling device;
a first attachment member attached to the coupling device;
a second attachment member attached to a fixing member of a hoistway in which the car moves or a fixing member of a movable body moving in the hoistway;
an adjustment device provided on the first mounting member and the second mounting member;
Equipped with
The adjustment device is
a displacement mechanism for rotating the first mounting member around a first axis and a second axis perpendicular to the first axis;
a blocking mechanism for blocking displacement of the first mounting member by the displacement mechanism;
Measuring device with. The measuring device according to claim 4, wherein the displacement mechanism rotates the first mounting member about a third axis perpendicular to each of the first axis and the second axis. The measuring device according to claim 4 or 5, wherein the sensor detects an attachment angle of the connecting device with respect to a horizontal plane as the attitude of the connecting device.

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