JP4896692B2 - Main rope abnormality detection device and elevator device provided with the same - Google Patents

Description

  The present invention relates to a main rope abnormality detection device that detects an abnormality in a main rope of an elevator device, and an elevator device including the main rope abnormality detection device.

  The conventional rope abnormality detection device is arranged so as to be movable in the vicinity of the sheave where the rope is hung, and when the abnormality occurs in the rope, the movable detection device is displaced by being pressed by the rope that has been lifted from the normal position on the sheave. A member, and a limit switch that operates by displacement of the movable member for detection. When the output signal from the limit switch is received, it is determined that the rope is abnormally detected, and the elevator car is stopped at the nearest floor (for example, see Patent Document 1).

JP 2002-3119 A

  However, in the conventional rope abnormality detection device, when an abnormality occurs in the rope that reverses the traveling direction in accordance with the raising and lowering of the car, the detection movable member is displaced only when the rope travels in one direction, and the limit switch Is configured to operate. Therefore, there is a problem that the limit switch cannot be operated when the rope travels in the other direction.

  In addition, since the limit switch operates based on the displacement of the detection movable member and determines that the rope abnormality is detected, even if the dust adhering to the rope is peeled off after the detection movable member is displaced, There was a problem of being judged.

The present invention has been made to solve the above problems, and can detect an abnormality in the main rope by displacing the movable detection member when an abnormality occurs in the main rope regardless of the traveling direction of the main rope. An object of the present invention is to obtain a main rope abnormality detection device.
It is another object of the present invention to provide an elevator apparatus that includes a main rope abnormality detection device and can prevent erroneous detection of main rope abnormality.

The main rope abnormality detection device according to the present invention is disposed in the vicinity of a driving sheave over which a main rope having a car connected to one end is stretched, and protrudes from the outer peripheral surface of the main rope when an abnormality occurs in the main rope. A detection member that is pressed by the portion and displaced from the initial position, and a displacement detection means that detects the displacement of the detection member and transmits a detection signal, and is spaced apart from the main rope by a predetermined distance so that the axial direction is A rotating shaft that is orthogonal to the advancing direction of the main rope and that is horizontal and is rotatably disposed, and one end of which is fixed to the rotating shaft and extends in the radial direction of the rotating shaft. in the initial position perpendicular to the rope, the tip is configured to have a predetermined gap with the main rope, regardless of the traveling direction of the main rope, and a detection piece which is displaced by being pressed to the projecting portion from the initial position, The position detection means includes a first detection magnet disposed so as to be displaced in conjunction with the rotation of the rotation shaft caused by the displacement of the detection piece, and a first detection magnet according to a displacement amount of the first detection magnet. It is arranged so that the presence or absence of magnetism detection from the magnet for detection is switched, and is composed of a magnetic detection switch that transmits a detection signal corresponding to one of the presence or absence of magnetism detection, one end fixed to the rotating shaft And an operating piece that extends vertically downward when the detecting piece is disposed at the initial position, and a weight that is fixed to the tip of the operating piece to return the detecting piece to the initial position .

  An elevator apparatus including a main rope abnormality detection device according to the present invention is disposed in the vicinity of a drive sheave over which a main rope having a car connected to one end is stretched. When an abnormality occurs in the main rope, the outer peripheral surface of the main rope A detection member that is pressed by a protruding portion protruding from the first position and displaced from an initial position, a displacement detection unit that detects a displacement of the detection member and transmits a detection signal, and an elevator that controls the raising and lowering of the car according to the detection signal When the elevator control panel receives the detection signal, it stores the position of the car at the time of reception and continues to raise and lower the car, and detects when the car passes through the stored car position again. When the signal is received again, a diagnostic operation is performed to raise and lower the car so that it passes through the stored car position, and a detection signal is received from the displacement detection means in the diagnostic operation. It determines that the main rope abnormality.

  According to the main rope abnormality detection device of the present invention, it is possible to detect an abnormality in the main rope such as a strand break regardless of the traveling direction of the main rope. Therefore, the main rope abnormality can be quickly detected as compared with the conventional rope abnormality detection device that has detected the abnormality of the main rope in one direction.

  According to the elevator apparatus equipped with the main rope abnormality detection device according to the present invention, the elevator control panel stores the car position when the detection signal is received from the displacement detection means, and the car again passes the stored car position. When a detection signal is received, a diagnostic operation is performed at the stored car position. The elevator control panel determines that the main rope is abnormal when receiving the detection signal even in the diagnostic operation. Accordingly, it is possible to prevent erroneous detection of an abnormality in the main rope caused by, for example, dust attached to the main rope being separated from the main rope after the detection member is displaced.

The best mode for carrying out the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
1 is a schematic view showing an elevator apparatus provided with a main rope abnormality detection device according to Embodiment 1 of the present invention, and FIG. 2 is a side view showing the main rope abnormality detection device according to Embodiment 1 of the present invention. FIG. 2 is an enlarged view of part A of FIG. 1. FIG. 3 is a front view showing a main rope abnormality detection device according to Embodiment 1 of the present invention, FIG. 4 is a top view showing the main rope abnormality detection device according to Embodiment 1 of the present invention, and FIG. FIG. 6 is a side view showing a state in which the broken strand passes through the location where the main rope abnormality detection device is disposed in the elevator apparatus provided with the main rope abnormality detection device according to the first embodiment. It is an operation | movement flowchart of an elevator apparatus provided with the main rope abnormality detection apparatus which concerns on form 1.

  In FIG. 1, an elevator apparatus includes a hoistway 1, a landing 2 provided on each floor and having an entrance 3 that opens to the hoistway 1, a car 4 that can be raised and lowered in the hoistway 1, and a driving sheave 6. The hoisting machine 5, the hoisting electric motor 7, the elevator control panel 11, the counterweight 15, the main rope 16, the landing device 18, the encoder 24, and the main rope abnormality detecting device 25A are provided.

The hoistway 1 is formed by being surrounded by a hoistway wall 10 and a closed landing door (not shown) provided in the hall 2 so that the doorway 3 can be freely opened and closed.
The hoisting motor 7 includes a motor unit 8 that generates rotational torque and a housing 9 that covers the motor unit 8. The hoisting motor 7 is disposed so that the rotational torque of the motor unit 8 can be transmitted to the drive sheave 6 of the hoisting machine 5.

  One end of the main rope 16 is fixed to the uppermost hoistway wall 10 of the hoistway 1, is suspended from the hoistway wall 10, and is hung on turning pulleys 22 a and 22 b provided at the lower part of the car 4. Inverted. Further, the main rope 16 is looped over a pulley 23 a installed on the uppermost hoistway wall 10 of the hoistway 1 and reversed again, and the drive rope of the hoisting machine 5 disposed at the lowermost part of the hoistway 1. It is wound around the car 6 and reversed again, and further, it is looped over the pulley 23b installed on the hoistway wall 10 at the top of the hoistway 1 and reversed again, and hung on the pulley 23c to which the counterweight 15 is fixed. Passed and reversed again. The other end of the main rope 16 is fixed to the uppermost hoistway wall 10 of the hoistway 1.

  Although not shown in detail, a sheave groove is formed on the outer peripheral surface of the drive sheave 6 according to the outer shape of the main rope 16 at a predetermined interval in the axial direction of the drive sheave 6. Three main ropes 16 are stretched over the sheave grooves.

  Then, the car 4 and the suspension weight 15 use the frictional force between the driving sheave 6 and the main rope 16 to shift the rotation and operation stop of the driving sheave 6 to the movement and stop of the main rope 16. Ascends and descends in the hoistway 1.

  The elevator control panel 11 includes a CPU 12 as a calculation control unit, a RAM 13 used in a working area when the CPU 12 performs calculation control, and a ROM 14 in which a program for controlling the elevator apparatus is stored.

  And the encoder 24 is integrally arrange | positioned at the hoisting electric motor 7 so that the rotation speed of the motor part 8 of the hoisting electric motor 7 can be detected. The encoder 24 is connected to the elevator control panel 11 so that the elevator control panel 11 can receive the rotation information of the motor unit 8 detected by the encoder 24. Since the rotational speed of the motor unit 8 is proportional to the up-and-down movement distance of the car 4, the elevator control panel 11 can recognize the height position in the hoistway 1 of the car 4 based on the received signal from the encoder 24. It has become. The height position of the car 4 in the hoistway 1 by the encoder 24 is recognized by the elevator control panel 11 with an accuracy of mm.

  Further, the landing device 18 includes a light projector 19 as a transmitter disposed on the upper outer wall surface of the car 4, a light receiver 20 as a receiver, and a reflector 21 provided on the landing wall 2 side of the hoistway wall 10. It is composed of

  The light projector 19 and the light receiver 20 are configured by, for example, an LED (light emitting diode) and a PD (photodiode) that converts light projected from the LED into electricity. And light is always projected from the projector 19 to the landing 2 side of each floor. The reflector 21 is attached so as to reflect the light from the light projector 19 toward the light receiver 20 when the car 4 faces the entrance 3 of the landing 2. Although not shown in detail, the elevator control panel 11 is connected to the light receiver 20 so that a signal photoelectrically converted by the light receiver 20 can be received.

The elevator control panel 11 stops the car 4 when receiving a signal converted from electricity from the light receiver 20 on the floor where the car 4 has been requested to stop. Thereby, the elevator control panel 11 can stop according to the position which made the car 4 oppose the entrance / exit 3 of each floor.
Although not shown in the figure, in the car room 4a of the car 4, notifying means such as a speaker is connected to the elevator control panel 11 so that arbitrary notification can be performed from the elevator control panel. For example, it is possible to notify a user in the car room 4a of the car 4 stopped at the nearest floor in the event of an emergency such as "Please check the elevator to get off".

  Further, the main rope abnormality detection device 25A is close to the upper side of the exit (entrance / exit) of the main rope 16 in the driving sheave 6 and adjacent to the main rope 16 portion on the suspension weight 15 side (anti-cage side). It is arranged.

1 to 4, each of the main ropes 16 is configured by twisting a plurality of strands 16 a (a plurality of strands twisted).
The breakage of the strand 16a, which is one of the factors causing the abnormality of the main rope 16, is largely caused by wear deterioration due to friction between the driving sheave 6 and the strand 16a of the main rope 16.

  In the elevator operation of the car 4, the lowest floor is the reference floor, and the car 4 is often landed on the lowest floor. Therefore, when the car 4 is landed on the lowest floor, the main rope 16 extends from the vicinity of the upper part of the suspension sheave 6 side of the driving sheave 6 to the car 4 side and wraps around the driving sheave 6. The portion of the main rope 16 is often worn by friction with the driving sheave 6 when the car 4 is raised. Therefore, when the car 4 is landed on the lowest floor, the portion of the main rope 16 that extends from the vicinity of the upper part of the suspension sheave 15 side of the driving sheave 6 to the car 4 side and is wound around the driving sheave 6. It is expected that wear deterioration will be accelerated compared to other main rope 16 parts.

  Therefore, when the car 4 is landed on the lowest floor, the strand 16a at the portion of the main rope 16 wound around the drive sheave 6 is broken from the vicinity of the upper portion of the drive sheave 6 on the suspension weight 15 side. It is important to diagnose whether or not.

If the main rope abnormality detection device 25A is close to the upper side of the exit (entrance / exit) of the main rope 16 in the driving sheave 6 and is adjacent to the main rope 16 portion on the car 4 side (anti-suspended weight side). When fixed to the housing 9, when the car 4 is landed on the lowest floor, the driving sheave on the side of the suspension weight 15 along the driving sheave 6 from the location where the main rope abnormality detection device 25 </ b> A is disposed. It becomes impossible to detect the breakage of the portion of the strand 16a of the main rope 16 extending in the vicinity of 6.
Therefore, the main rope abnormality detection device 25A is close to the upper side of the exit (entrance / exit) of the main rope 16 in the driving sheave 6 and adjacent to the main rope 16 portion on the suspension weight 15 side (counter cage side). It is preferable to be disposed.

Next, details of the main rope abnormality detection device 25A will be described.
As shown in FIGS. 2 to 4, the main rope abnormality detection device 25 </ b> A includes a support member 31, a rotation unit 40, a magnetic detection switch 46 a, and a fixed-side position holding magnet 45 a.
The support member 31 includes a bottom plate 32a, a pair of side plates 33a and 33b, and a shaft bar 34a.

The bottom plate 32a is formed in a rectangular flat plate shape. Then, the side plates 33a and 33b are processed into a substantially trapezoidal flat plate having the same length as the short side of the bottom plate 32a, the bottom sides of the side plates 33a and 33b are aligned with both short sides of the bottom plate 32a, and the side plates 33a and 33b. Are opposed to each other so as to protrude vertically from the bottom plate 32a. A shaft bar 34a is fixed between the upper portions of both side plates 33a and 33b.
At this time, the axial direction of the shaft bar 34a is orthogonal to the traveling direction of the main rope 16 and is disposed horizontally.

The rotating portion 40 includes a first detection magnet 41, a weight 42a, a cylindrical portion 43 as a rotation shaft, a detection piece 44, a long columnar support rod 47, and an operation piece 48.
The first detection magnet 41 uses a ferrite magnet, but other magnets such as a rubber magnet may be used. The weight 42a is also a magnet similar to the first detection magnet. Here, a combination of the cylindrical portion 43 and the detection piece 44 is used as a detection member.
The cylindrical portion 43 has substantially the same length as the shaft rod 34a, and is mounted on the shaft rod 34a in a loosely fitted state. Thereby, the cylindrical part 43 is rotatable around the axis of the shaft bar 34a.

The detection piece 44 is formed in a rectangular flat plate shape, and one end surface on the long side is fixed to the outer peripheral surface of the cylindrical portion 43 with the length direction of the long side aligned with the length direction of the cylindrical portion 43. The detection piece 44 extends in the radial direction of the cylindrical portion 43, and the extending direction is orthogonal to the traveling direction of the main rope 16. That is, the main surface of the detection piece 44 is orthogonal to the traveling direction of the main rope 16.
In addition, three semicircular detection grooves 44 a are formed at the tip of the detection piece 44 (the edge portion on the other long side) corresponding to the outer shape of the main rope 16 and the distance between the main ropes 16. Is formed. The outer periphery of the main rope 16 is fitted in the detection groove 44a of the detection piece 44 with a predetermined gap (gap) from the detection groove 44a.

  As described above, the shaft bar 34a is arranged so that its axial direction is orthogonal to the traveling direction of the main rope 16 and is horizontal, so that the detection piece 44 has either of its main surfaces as the main surface. Even if it is pressed in a direction perpendicular to the surface, it is rotated around the axis of the shaft bar 34a (cylindrical portion 43).

Further, the length of the long side of the detection piece 44 is shorter than the length of the cylindrical portion 43 in the axial direction, and both ends of the cylindrical portion 43 protrude from both ends of the detection piece 44.
The support rod 47 has one end fixed to the outer peripheral surface on one end of the cylindrical portion 43 and protrudes vertically downward from the cylindrical portion 43. Further, the first detection magnet 41 is fixed to the other end of the support bar 47.
Further, one end side of the operating piece 48 is fixed to the outer peripheral surface on the other end side of the cylindrical portion 43.
At this time, the operating piece 48 protrudes vertically below the cylindrical portion 43, and the support rod 47 and the operating piece 48 are disposed opposite to each other at both ends of the cylindrical portion 43. A weight 42 a is fixed to the other end of the operating piece 48.
The rotating part 40 configured as described above is freely rotatable around the axis of the shaft bar 34a.

The fixed side position holding magnet 45a is fixed to the surface of the other side plate 33b facing the one side plate 33a. At this time, the fixed-side position holding magnet 45a is disposed in the vicinity of the lower portion of the weight 42a. The fixed-side position holding magnet 45a magnetically attracts the weight 42a and holds the operating piece 48 at a position extending vertically downward from the rotating portion 43.
Thereby, when the detection piece 44 is not pressed from the protrusion part 16b (after-mentioned) of the main rope 16, the whole rotation part 40 containing the detection piece 44 is stably hold | maintained at a predetermined position (initial position). . The initial position of the rotating portion 40 is a position before the detection piece 44 is pressed and displaced by the protruding portion 16b of the strand 16a in the description of the operation of the main rope abnormality detection device 25A described later. Here, the detection piece The initial position of the rotating portion 40 is when the extending direction of the 44 from the cylindrical portion 43 is arranged perpendicular to the traveling direction of the main rope 16.

  The magnetic detection switch 46a is fixed to the surface of one side plate 33a facing the other side plate 33b. At this time, the magnetic detection switch 46a is fixed to the side piece 33a in the vicinity of the lower portion of the first detection magnet 41 in a state where the rotating portion 40 is held at a predetermined position. Thereby, when the rotation part 40 is arrange | positioned in the initial position, magnetism is detected by the magnetic detection switch 46a.

When the detection piece 44 is rotated by a predetermined distance from this state, the first detection magnet 41 is separated from the magnetic detection switch 46a and the strength of the magnetism toward the magnetic detection switch 46a is weakened. The magnetic detection by 46a is not performed. In other words, the magnetic detection switch 46 a is arranged so that the presence or absence of magnetic detection from the first detection magnet 41 is switched according to the amount of displacement of the first detection magnet 41.
Here, a combination of the first detection magnet 41 and the magnetic detection switch 46a is referred to as a displacement detection means.

Although not shown in detail, the magnetic detection switch 46 a is electrically connected to the elevator control panel 11. A detection signal or a non-detection signal is transmitted from the magnetic detection switch 46a according to the detection result of magnetism, and the detection signal or the non-detection signal is received by the elevator control panel 11.
The magnetic detection switch 46a transmits a non-detection signal when magnetism is detected, and transmits a detection signal when magnetism is not detected.
Although not shown in detail, the main rope abnormality detection device 25A configured as described above is arranged by fixing a column member 49 protruding from the back surface of the bottom plate 32a to the housing 9 or the like. Yes.

Next, the operation of the main rope abnormality detection device 25A when the strand 16a of the main rope 16 is broken will be described.
As shown in FIG. 5, when the strand 16a of the main rope 16 is broken, the tip of the broken strand 16a protrudes with respect to the outer peripheral surface of the main rope 16, and a protruding portion 16b is formed. When the portion where the strand 16a is broken passes through the location where the detection piece 44 is disposed, the protruding portion 16b presses the detection groove 44a of the detection piece 44 regardless of the traveling direction of the main rope 16. The rotating part 40 is rotated around the axis of the shaft bar 34a.

At this time, the magnetic field of the first detection magnet 41 is not detected by the magnetic detection switch 46a, and a detection signal is transmitted from the magnetic detection switch 46a.
Further, after the protruding portion 16b of the strand 16a passes the location where the detection piece 44 is disposed, the weight 42a and the first detection magnet 41 rotated upward by a predetermined distance are detected by the detection piece 44 by the strand 16a. Therefore, the detection piece 44 automatically returns to the initial position shown in FIG. 2. Further, the weight 42a is attracted by the fixed-side position holding magnet 45a, and the detection piece 44 is stably held at the initial position when not pressed by the protrusion 16b of the strand 16a.

Next, the operation of the elevator apparatus including the main rope abnormality detection device 25A will be described with reference to FIG.
In FIG. 6, steps 101 to 108 are denoted as S101 to S108 for convenience.
As an initial state, it is assumed that the car 4 is normally lifted and lowered in the hoistway 1.

First, in step 101, the CPU 12 of the elevator control panel 11 determines whether or not a detection signal is received from the magnetic detection switch 46a.
If the CPU 12 determines in step 101 that a detection signal has not been received (a non-detection signal has been received), step 101 is repeated until a detection signal is received.

  When the CPU 12 determines in step 101 that the detection signal has been received, at the same time, the CPU 12 receives the detection signal based on the information from the first encoder 24 (hereinafter referred to as the position H of the car 4). Is stored in the RAM 13 and the car 4 is moved up and down (step 102).

In step 103, the CPU 12 determines whether or not a detection signal has been received when the car 4 passes through the position H stored in the RAM 13 again.
When the CPU 12 determines in step 103 that the detection signal has been received, the car 4 is stopped at the nearest floor, and a notification such as “Please check the elevator to get off the car” is provided using the notification means. This is performed for the user in 4a, and the user is guided outside the cab 4a (step 104), and the process proceeds to step 105.

  If the CPU 12 determines that the detection signal is not received in step 103, it is determined that the strand 16a of the main rope 16 is not broken, and the car 4 position H stored in the RAM 13 is reset (step S1). 108) Returning to step 101, the car 4 is continuously moved up and down.

  In step 105, the elevator control panel 11 starts the operation of the car 4, moves the car 4 to the position H of the car 4 stored in the RAM 13, and then moves the car 4 up and down at a low speed and stores it. A diagnostic operation is performed to determine whether a detection signal has been received at position H of the car 4.

If the CPU 12 determines in step 105 that a detection signal has been received, it determines that the strand 16a has been broken, stops the traveling operation of the car 4 (step 106), and proceeds to step 107.
When the CPU 12 determines that the detection signal has not been received in the diagnostic operation of step 105, the CPU 12 determines that the strand 16a is not broken and resets the position H of the car 4 stored in the RAM 13. (Step 108), return to Step 101

  In step 107, the CPU 12 considers that the strand 16a of the main rope 16 is broken, and transmits information on the broken strand 16a to the management center (not shown) of the elevator apparatus.

  According to the first embodiment, the rotating portion 43 is disposed so as to be separated from the main rope 16 by a predetermined distance, to be orthogonal to the traveling direction of the main rope, and to be horizontal. In addition, the detection piece 44 is fixed to the rotation portion 43 at one end surface thereof and extends in the radial direction of the rotation portion 43, and the main rope 16 and the extension direction are orthogonal to the traveling direction of the main rope 16. It is arranged so as to be rotatable around the axis of the rotation part 43 with a predetermined gap.

  Therefore, when the detection piece 44 is pressed in the traveling direction of the main rope 16 by the protruding portion 16b formed by protruding the broken strand 16a from the outer peripheral surface of the main rope 16, the detection piece 44 is advanced by the main rope 16. It is rotated regardless of the direction. Further, since the first detection magnet 41 is disposed so that the magnetism detected by the magnetic detection switch 46a is not detected when the detection piece 44 is rotated in any direction, the main rope 16 advances. Regardless of the direction, it is possible to detect an abnormality of the main rope 16 such as a break of the strand 16a. Therefore, if the main rope abnormality detection device 25A is used, an abnormality of the main rope 16 can be discovered more quickly than in the conventional case where the abnormality of the main rope 16 is detected in one direction.

  Further, when the elevator control panel 11 receives the detection signal from the displacement detecting means, the elevator control panel 11 stores the position H of the car 4 at the time of reception and continues the raising / lowering operation of the car 4 and passes the stored position H of the car 4. When the detection signal is received again, the diagnostic operation is performed at the stored position H of the car 4. The elevator control panel 11 determines that the strand 16a of the main rope 16 has been broken when a detection signal is received from the magnetic detection switch 46a in the diagnostic operation.

  Here, for example, even if dust attached to the main rope 16 displaces the detection piece 44 and the magnetic detection switch 46a transmits a detection signal, the dust attached to the main rope 16 displaces the detection piece 44. After that, it is peeled off or moved along the main rope 16. In this case, when the car 4 passes the position H again, a non-detection signal is transmitted from the magnetic detection switch 46a. In the elevator control panel 11, when the car 4 does not continuously receive a detection signal when it passes the same position H, it can be determined that dust or the like has adhered to the main rope 16. It is possible to prevent erroneous detection of abnormality.

  Further, since the detection groove 44a is formed at the tip of the detection piece 44 so as to be fitted to the outer periphery of the main rope 16, when the protruding portion 16b from the outer peripheral surface of the main rope 16 protrudes a predetermined distance, The abnormality of the rope 16 is detected more stably.

Further, the main rope abnormality detection device 25A is close to the upper side of the exit (entrance / exit) of the main rope 16 in the driving sheave 6 and adjacent to the main rope 16 portion on the suspension weight 15 side (anti-cage side). Since it is disposed, it is possible to include the part of the main rope 16 where the progress of wear deterioration is expected to be accelerated in a range where abnormality can be detected.
Further, the weight 42a is attached to the tip of an operating piece 48 that extends vertically below the cylindrical portion 43 when the detection piece 44 is in the initial position. Therefore, even if the detection piece 44 is pressed by the protruding portion 16b and rotated from the initial position, the detection piece 44 can be automatically returned to the initial position when the protruding portion 16b passes the location where the detection piece 44 is disposed. it can.

  Further, the weight 42a is formed of a magnet, and the fixed position holding magnet 45a is disposed at a position for magnetically attracting the weight 42a in a direction in which the operating piece 48 is extended vertically downward from the rotating portion 43. The detection piece 44 is stably held without swinging from the initial position.

  Further, since the strand 16a breaks and the abnormality of the main rope 16 can be detected before the strand 16a is unwound from the outer periphery of the main rope 16 over a wide range, the broken strand 16a is entangled with the components of the elevator apparatus. It becomes possible to prevent the basket 4 from being lifted and lowered. Thereby, the user of an elevator apparatus can use an elevator apparatus in comfort.

  In the first embodiment, the magnetic detection switch 46a is described as transmitting a detection signal when the magnetism of the first detection magnet 41 is not detected. However, the detection piece 44 is rotated by a predetermined distance. When the magnetism of the first detection magnet 41 is detected, the detection signal is transmitted when the magnetism of the first detection magnet 41 is detected, and the non-detection signal when the magnetism is not detected May be transmitted.

Embodiment 2. FIG.
7 is a perspective view showing a main rope abnormality detecting device according to Embodiment 2 of the present invention, FIG. 8 is a side view showing the main rope abnormality detecting device according to Embodiment 2 of the present invention, and FIG. 10 is a top view showing a main rope abnormality detection device according to Embodiment 2, and FIG. 10 is a side view showing a state in which the detection roller of the main rope abnormality detection device according to Embodiment 2 of the present invention is pressed against a broken strand. FIG. 11 is an enlarged side view of a portion B in FIG.

In addition, the same code | symbol is attached | subjected to the part which is the same as that of the said Embodiment 1, or an equivalent, and the description is abbreviate | omitted.
7 to 11, the main rope abnormality detection device 25B has a pair of support members 51a, a detection roller 57a as a detection member, a shaft bar 34b, and a displacement detection encoder 59 as a displacement detection means.
Each of the support members 51 a includes a flat cylindrical base 52 having a substantially trapezoidal cross section, a cylindrical shaft support 53 having the same thickness as the base 52, a spring 54, and a device rotating shaft rod 55. ing.
A shaft support portion 53 is fixed to the upper base 52 a side of the base portion 52 so that the opening direction thereof coincides with the opening direction of the base portion 52.

Here, the base 52 has its lower base 52b fixed to the vicinity of both short sides of the rectangular flat base 60. At this time, the pair of base portions 52 are arranged with the openings facing each other.
Although not shown in detail, the base 52 is provided on the back surface of the pedestal 60 so as to fix the column member 61 to the casing 9 of the hoisting motor 7 described above.

The device rotation shaft rod 55 is inserted through both the circular portions 54a. Both ends of the device rotation shaft rod 55 are rotatably supported by a rotation shaft support portion 56 protruding from both short sides of the pedestal 60.
Further, the spring 54 is disposed at one corner formed by the lower base 52b having a trapezoidal cross section of the base 52 and the inclined side 52c connecting the upper base 52a and the lower base 52b. Further, a notch is formed in a window (not shown) on the one corner portion side of the lower bottom 52b, and the pedestal 60 is exposed.
The spring 54 is formed in a V shape with a single elastic metal wire or the like, and a circular portion 54a having a predetermined diameter is wound around the vertex of the V shape by winding an intermediate portion of the metal wire. Is formed.
Further, one side of the V-shape is disposed along the inclined side 52c, and the other side is fixed to the pedestal 60 exposed from the cutout window of the lower bottom 52b. At this time, the elastic force of the spring 54 works in the direction in which the inclined side 52c and the pedestal 60 are pressed.

The detection roller 57a formed in a columnar shape is fixed to the shaft bar 34b so as to be externally fitted and coaxially, and the shaft bar 34b protrudes from both end surfaces of the detection roller 57a. At this time, the detection roller 57a is disposed between the two support members 51a.
Further, both ends of the shaft bar 34 b are inserted into the shaft support portions 53 and are rotatably supported by the shaft support portions 53.
Then, the detection roller 57a and the shaft bar 34b are rotated around the axis of the shaft bar 34b.
As the material of the detection roller 57a, closed-cell polyethylene foam (Sanperca) crosslinked with a chemical crosslinking agent can be used.

Further, a displacement detection encoder 59 is attached to one end of the shaft bar 34b so as to detect rotation of the shaft bar 34b (rotation of the detection roller 57a). Although not shown in detail, the displacement detection encoder 59 is fixed to the shaft support portion 53 by using a fixing member that connects and fixes the outer peripheral surface of the case housing the main portion and the outer peripheral surface of the shaft support portion 53. ing. Further, a displacement detection encoder 59 is connected to the elevator control panel 11, and the elevator control panel 11 can recognize the rotation of the detection roller 57 a based on information received from the displacement detection encoder 59. .
Further, detection grooves 58a are formed on the outer peripheral surface of the detection roller 57a so as to correspond to the respective outer shapes of the main ropes 16 and the intervals between the main ropes 16.

The detection roller 57a is arranged so that its axial center is horizontal and the outer peripheral surface is located at a predetermined gap (gap) from the main rope 16.
The main rope 16 is fitted in the detection groove 58a of the detection roller 57a.

The operation of the main rope abnormality detection device 25B configured as described above will be described.
When the strand 16a of the main rope 16 is broken, as shown in FIG. 10, the tip of the broken strand 16a protrudes from the outer peripheral surface of the main rope 16, and a protruding portion 16b is formed. When the portion where the strand 16a is broken passes through the location where the detection roller 57a is disposed, the protruding portion 16b becomes the detection groove 58a on the outer peripheral surface of the detection roller 57a regardless of the traveling direction of the main rope 16. The detection roller 57a is rotated.

At this time, the displacement detection encoder 59 transmits a detection signal when the rotation from the initial position of the detection roller 57a (shaft bar 34b) is detected. When the rotation of the detection roller 57a is not detected, a non-detection signal is transmitted. It is supposed to send. The initial position refers to the position of the detection roller 57a before being rotated by being pressed by the protrusion 16b. The detection roller whose rotation has stopped after the protrusion 16b has passed the location where the detection roller 57a is disposed. The position 57a is again defined as the initial position.
Note that the Sanperca used for the material of the detection roller 57a is light in weight and does not increase the inertial force. After the projecting portion 16b passes the location where the detection roller 57a is disposed, the shaft support portion 53 and the shaft rod 34b are slightly exposed. The rotation of the detection roller 57a is immediately stopped by a strong frictional force.
Although not shown in detail, the displacement detection encoder 59 is electrically connected to the elevator control panel 11, and a detection signal or a non-detection signal is received by the elevator control panel 11.

When the detection roller 57a is pressed against the strand 16a by a predetermined pressing force or more in the radial direction of the detection roller 57a, as shown in FIG. 11, the support member 51a and the detection roller 57a are connected to the device rotation shaft bar. It is rotated around 55 axes. At this time, since the other side of the V-shape of the spring 54 is fixed to the pedestal 60, only one side of the V-shape of the spring 54 is rotated, but it is detected around the device rotation shaft rod 55 by a predetermined distance. When the roller 57a is rotated, both sides of the V-shaped spring 54, in which the elastic force is acting in the opposite direction, act so as to attract each other.
This prevents the detection roller 57a from being damaged by the end portion of the strand 16a, and at the same time, after the strand 16a passes the position where the detection roller 57a is disposed, the main rope abnormality detection device 25B is returned to the original position. Automatically returned to

Regarding the operation of the elevator apparatus provided with the main rope abnormality detection device 25B, in FIG. 6 illustrating the operation of the elevator apparatus provided with the main rope abnormality detection device 25A of the first embodiment, the detection signals of S101, S103 and S105 are received. It can be explained in the same manner as in the first embodiment by replacing the definitions as follows.
That is, in the second embodiment, the displacement detection encoder 59 transmits a detection signal when the rotation of the detection roller 57a is detected, and the elevator control panel 11 determines that the detection signal has been received.

Therefore, according to the second embodiment, the elevator device including the main rope abnormality detection device 25B can obtain the same effects as the elevator device including the main rope abnormality detection device 25A according to the first embodiment.
In addition, the detection roller 57a of the main rope abnormality detection device 25B has a broken strand regardless of the traveling direction of the main rope 16 when the strand 16a is protruded from the outer peripheral surface of the main rope 16, for example. Since it is pushed and rotated by the part 16a, the displacement detecting encoder 59 transmits a detection signal. Therefore, the elevator control panel 11 can recognize that the detection roller 57a has rotated by corresponding to the reception of the detection signal.
Therefore, regardless of the traveling direction of the main rope 16, an abnormality of the main rope 16 such as a break of the strand 16a can be detected.

Embodiment 3 FIG.
12 is a side view showing a main rope abnormality detecting device according to Embodiment 3 of the present invention, and FIG. 13 is a front view showing the main rope abnormality detecting device according to Embodiment 3 of the present invention.
In addition, the same code | symbol is attached | subjected to the part which is the same as that of the said Embodiment 1, or an equivalent, and the description is abbreviate | omitted.
12 and 13, the main rope abnormality detection device 25C includes a support member 51b, magnetic detection switches 46b and 46c, a second detection magnet 62, a weight 42b, a fixed-side position holding magnet 45b, and detection as a detection member. It has a roller 57b.

Each of the support members 51b includes a bottom plate 32b, a pair of side plates 33c and 33d, and a shaft bar 34c.
The bottom plate 32b is formed in a rectangular flat plate shape, and the side plates 33c and 33d are vertically projected from both short sides of the bottom plate 32b and face each other. A shaft bar 34c is fixed between the upper portions of the side plates 33c and 33d.

And the detection roller 57b formed in the cylinder is formed with the same material as the above-mentioned detection roller 57a, and is arrange | positioned in the loose-fit state by the axial rod 34c. Thereby, the detection roller 57b is rotatable around the axis of the shaft bar 34c. At this time, the outer peripheral surface of the detection roller 57b has a predetermined distance from the bottom plate 32b.
A weight 42b having a substantially rectangular flat plate shape is fitted in an intermediate portion in the axial direction on the outer peripheral surface of the detection roller 57b. The weight 42b uses a ferrite magnet or a rubber magnet.
At this time, the surface of the weight 42b is exposed to the surface of the detection roller 57b. Further, when the detection roller 57b is at a predetermined position (initial position), the weight 42b is fitted to a part of the outer peripheral surface located below the axis of the detection roller 57b in the vertical direction. The initial position of the detection roller 57b is a position before being displaced by being pressed by the protruding portion of the strand 16a in the description of the operation of the main rope abnormality detection device 25C described later.

Further, on the outer peripheral surface of the detection roller 57b, detection grooves 58b are formed corresponding to the respective outer shapes of the main ropes 16 and the intervals between the main ropes 16.
The detection roller 57b is arranged so that its axial center is horizontal and the outer peripheral surface is located at a predetermined gap (gap) from the main rope 16.
The main rope 16 is fitted into the detection groove 58b with a predetermined gap from the detection groove 58b of the detection roller 57b.

Further, a fixed-side position holding magnet 45b is fixed at a predetermined distance to a portion of the bottom plate 32b facing the weight 42b. Although the ferrite magnet is used for the fixed-side position holding magnet 45b, other magnets such as a rubber magnet may be used.
The fixed-side position holding magnet 45b magnetically attracts the weight 42b, and the detection roller 57b is stably held at the initial position.

The second detection magnet 62 is a long flat rubber magnet or the like, and is fitted to a lower portion of one end surface of the detection roller 57b. At this time, the second detection magnet 62 is fitted at a position at a predetermined distance in the radial direction from the shaft center in a state where the length direction is adjusted to the circumferential direction. In addition, although the ferrite magnet etc. may be used for the 2nd magnet 62 for a detection, there exists an advantage that a rubber magnet is easy to process.
Further, when the detection roller 57b is in the initial position, the second detection magnet 62 is symmetrically disposed on the vertical plane including the axis of the detection roller 57b, and the height positions of both ends thereof are the height of the axis. It is lower than the position. The surface of the second detection magnet 62 is exposed from one end surface of the detection roller 57b.

  A pair of magnetic detection switches 46b and 46c having the same function as the magnetic detection switch 46a described above are disposed on the surface of the side plate 33c facing the one end surface of the detection roller 57b. At this time, the pair of magnetic detection switches 46b and 46c are disposed at a portion of the side plate 33c slightly above the height position of the axis of the detection roller 57b, and the detection roller 57b rotates by a predetermined distance in one direction. When one end of the second detection magnet 62 approaches or faces the magnetic detection switch 46b and the detection roller 57b is rotated by a predetermined distance in the other direction, The other end of the detection magnet 62 is close to or faces the magnetic detection switch 46c.

The magnetic detection switches 46b and 46c arranged in this way are arranged so that both ends of the second detection magnet 62 are separated from each of the magnetic detection switches 46b and 46c by a predetermined distance or more. 46c does not detect magnetism.
When the detection roller 57b is rotated in one direction by a predetermined distance, one of the end portions of the second detection magnet 62 approaches one of the magnetic detection switches 46b and 46c. The magnetism is detected by one of the magnetic detection switches 46b and 46c. When the detection roller 57b rotates in the other direction, magnetism is detected by either one of the magnetic detection switches 46b and 46c.

In other words, the magnetic detection switches 46 b and 46 c are arranged so that the presence or absence of magnetic detection from the second detection magnet 62 is switched according to the amount of displacement of the second detection magnet 62.
Here, the combination of the second detection magnet 62 and the magnetic detection switches 46b and 46c is referred to as displacement detection means.

The magnetic detection switches 46b and 46c transmit detection signals or non-detection signals according to the magnetic detection results.
Although not shown in detail, the magnetic detection switches 46 b and 46 c are electrically connected to the elevator control panel 11, and a detection signal or a non-detection signal is received by the elevator control panel 11.

The magnetic detection switches 46b and 46c transmit a detection signal when magnetism is detected, and transmit a non-detection signal when magnetism is not detected.
Although not shown in detail, the main rope abnormality detection device 25C configured as described above fixes the column member 63 protruding from the back surface of the bottom plate 32b to the casing 9 of the hoisting motor 7 described above. Etc. are arranged.

The operation of the main rope abnormality detection device 25C configured as described above will be described.
When the strand 16a of the main rope 16 breaks, the tip of the broken strand 16a protrudes from the outer peripheral surface of the main rope 16 in the same manner as described in the explanation of the operation in the main rope abnormality detection devices 25A and 25B. A portion (not shown) is formed.

When the broken portion of the strand 16a passes the location where the detection roller 57b is disposed, the protruding portion of the strand 16a travels while pressing the detection groove 58b on the outer peripheral surface of the detection roller 57b. At this time, when the force pressing the detection roller 57b in the circumferential direction becomes larger than the attractive force between the weight 42b and the fixed-side position holding magnet 45b, the detection roller 57b is rotated.
At this time, the detection roller 57b is rotated regardless of which direction the main rope 16 travels.

  Further, when the detection roller 57b is rotated by a predetermined distance in either direction, one end or the other end of the second detection magnet 62 approaches one of the magnetic detection switches 46b and 46c, and the magnetism is increased. Magnetism is detected by one of the detection switches 46b and 46c.

One of the magnetic detection switches 46b and 46c that have detected the magnetism transmits a detection signal.
Further, after the protruding portion of the main rope 16 has passed the location where the detection roller 57b is disposed, the weight 42b and the second detection magnet rotated upward by a predetermined distance are moved to the detection roller 57b by the protruding portion. Therefore, the detection roller 57b automatically returns to the initial position. Further, when the detection roller 57b is not pressed against the protruding portion of the strand 16a by the attractive force between the weight 42b and the fixed-side position holding magnet 45b, it is stably held at the initial position.

  Regarding the operation of the elevator apparatus provided with the main rope abnormality detection device 25C, the detection signals of S101, S103 and S105 were received in FIG. 6 illustrating the operation of the elevator apparatus provided with the main rope abnormality detection device 25A of the first embodiment. It can be explained in the same manner as in the first embodiment by replacing the definition as follows.

  That is, in the third embodiment, the detection roller 57b rotates, the second detection magnet 62 comes close to one of the magnetic detection switches 46b and 46c, and the magnetism is generated by one of the magnetic detection switches 46b and 46c. When detected, the elevator control panel 11 receives a detection signal from one of the magnetic detection switches 46b and 46c.

  Therefore, according to the third embodiment, the elevator device including the main rope abnormality detection device 25C can obtain the same effects as the elevator device including the main rope abnormality detection device 25A according to the first embodiment.

  In addition, the detection roller 57b of the main rope abnormality detection device 25C is pushed and rotated by the protruding portion of the broken strand 16a regardless of the traveling direction of the main rope 16, and either one of the magnetic detection switches 46b and 46c. Thus, the magnetism is detected and a detection signal is transmitted to the elevator control panel 11. Therefore, the main rope abnormality detection device 25C can detect an abnormality of the main rope 16 such as a break of the strand 16a regardless of the traveling direction of the main rope 16.

  Further, since the weight 42b is fitted to a part of the outer peripheral surface located below the axis of the detection roller 57b in the vertical direction when the detection roller 57b is in the initial position, the detection roller 57b is a protruding portion. Even if the protrusion is pushed and rotated, the detection roller 57b can be automatically returned to the initial position by the weight of the weight 42b when the protruding portion passes the location where the detection roller 57b is disposed.

  Further, the weight 42b is formed of a magnet, and the fixed-side position holding magnet 45b is arranged so as to magnetically attract the weight 42b and return the detection roller 57b to the initial position, so that the detection roller 57b is moved from the initial position. It is held stably without swinging.

Although the detection roller 57b of the third embodiment has been described as being rotatably supported by the shaft bar 34b fixed between the side plates 33c and 33d, further, similarly to the second embodiment,
The spring 54, the device rotation shaft rod 55, and the rotation shaft support portion 56 may be disposed, and the detection roller 57b may be disposed to be rotatable around the axis of the rotation shaft support portion 56.

  The magnetic detection switches 46b and 46c have been described as transmitting detection signals when the magnetism of the second detection magnet 62 is detected. However, in the magnetic detection switches 46b and 46c, the detection roller 57b is at the initial position. At some point, the magnet is arranged so as to detect the magnetism of the second detection magnet 62, and the detection roller 57b rotates by a predetermined distance so that the magnetism of the second detection magnet 62 is not detected. Sometimes it may be arranged to transmit a detection signal.

  In each embodiment, it has been described that the strand 16a is broken and a part of the main rope 16 protrudes from the outer peripheral surface to detect an abnormality in the main rope 16. However, for example, a plurality of twisted strands It is also possible to detect an abnormality in the main rope 16 due to a part of 16a being unscrewed and protruding from the outer peripheral surface of the main rope 16.

It is a schematic diagram which shows the elevator apparatus provided with the main rope abnormality detection apparatus which concerns on Embodiment 1 of this invention. It is a side view which shows the main rope abnormality detection apparatus which concerns on Embodiment 1 of this invention. It is a front view which shows the main rope abnormality detection apparatus which concerns on Embodiment 1 of this invention. It is a top view which shows the main rope abnormality detection apparatus which concerns on Embodiment 1 of this invention. In the elevator apparatus provided with the main rope abnormality detection device according to Embodiment 1 of the present invention, it is a side view showing a state in which a broken strand passes through a location where the main rope abnormality detection device is disposed. It is an operation | movement flowchart of the elevator apparatus provided with the main rope abnormality detection apparatus which concerns on Embodiment 1 of this invention. It is a perspective view which shows the main rope abnormality detection apparatus which concerns on Embodiment 2 of this invention. It is a side view which shows the main rope abnormality detection apparatus which concerns on Embodiment 2 of this invention. It is a top view which shows the main rope abnormality detection apparatus which concerns on Embodiment 2 of this invention. It is a side view which shows the state by which the detection roller of the main rope abnormality detection apparatus which concerns on Embodiment 2 of this invention was pressed by the broken strand. It is the B section enlarged side view of FIG. It is a side view which shows the main rope abnormality detection apparatus which concerns on Embodiment 3 of this invention. It is a front view which shows the main rope abnormality detection apparatus which concerns on Embodiment 3 of this invention.

Explanation of symbols

  4 car, 6 drive sheave, 16 main rope, 16b protrusion, 41 first detection magnet (displacement detection means), 42a, 42b weight, 43 cylindrical portion (rotating shaft, detection member), 44 detection piece ( Detection member), 44a Detection groove, 45a, 45b Fixed position holding magnet, 46a to 46c Magnetic detection switch (displacement detection means), 48 Actuating piece, 57a, 57b Detection roller (detection member), 59 For displacement detection Encoder (displacement detection means), 62 Second detection magnet (displacement detection means).

Claims (9)

A main rope with a car connected to one end is arranged in the vicinity of the driving sheave, and when an abnormality occurs in the main rope, the main rope is pressed by a protruding portion that protrudes from the outer peripheral surface of the main rope. A detection member to be displaced;
In a main rope abnormality detection device comprising a displacement detection means for detecting a displacement of the detection member and transmitting a detection signal,
The detection member is spaced apart from the main rope by a predetermined distance, and the rotation direction is arranged so that the axial direction is perpendicular to the traveling direction of the main rope and is horizontal, and one end is rotated. The main rope is fixed to the shaft and extends in the radial direction of the rotary shaft, the extending direction is an initial position orthogonal to the main rope, and the tip has a predetermined gap with the main rope. Regardless of the traveling direction, the detection piece is pressed by the protrusion and displaced from the initial position,
The displacement detecting means corresponds to a first detection magnet disposed so as to be displaced in conjunction with the rotation of the rotation shaft due to the displacement of the detection piece, and a displacement amount of the first detection magnet. The magnetic detection switch is arranged so as to switch the presence or absence of magnetic detection from the first detection magnet, and transmits the detection signal corresponding to one of the magnetic detection presence or absence,
One end is fixed to the rotation shaft, and the operation piece is extended vertically downward when the detection piece is arranged at the initial position;
A main rope abnormality detection device comprising: a weight fixed to a tip of the operating piece, and returning the detection piece to an initial position.   2. The main rope abnormality detection device according to claim 1, wherein a detection groove is formed at the tip of the detection piece so as to be fitted to the outer periphery of the main rope. The weight is a magnet,
The main rope according to claim 1 or 2, wherein the fixed-side position holding magnet is disposed so as to magnetically attract the magnet and position the operating piece vertically downward from the rotating shaft. Anomaly detection device. A main rope with a car connected to one end is arranged in the vicinity of the driving sheave, and when an abnormality occurs in the main rope, the main rope is pressed by a protruding portion that protrudes from the outer peripheral surface of the main rope. A detection member to be displaced;
In a main rope abnormality detection device comprising a displacement detection means for detecting a displacement of the detection member and transmitting a detection signal,
The detection member is formed in a cylindrical shape, and is arranged to be rotatable around the axis with a predetermined gap from the main rope at an outer peripheral surface of the axis, with a horizontal axis. Regardless of the traveling direction, a detection roller that is pressed by the protrusion and rotates from the initial position,
The displacement detection means is a displacement detection encoder which is disposed so as to be able to detect rotation of the detection roller around the axis, and which transmits the detection signal when the detection roller rotates. Rope abnormality detection device. A main rope with a car connected to one end is arranged in the vicinity of the driving sheave, and when an abnormality occurs in the main rope, the main rope is pressed by a protruding portion that protrudes from the outer peripheral surface of the main rope. A detection member to be displaced;
In a main rope abnormality detection device comprising a displacement detection means for detecting a displacement of the detection member and transmitting a detection signal,
The detection member is formed in a cylindrical shape, and its axis is horizontally and parallel to the traveling direction of the main rope, and the outer peripheral surface is rotated around the axis to a position having a predetermined gap from the main rope. A detection roller that is freely arranged and is pressed by the protruding portion and rotated from the initial position regardless of the traveling direction of the main rope.
The displacement detection means includes a second detection magnet disposed on a part of one end surface of the detection roller, and the second detection magnet rotated by a predetermined angle in conjunction with the rotation of the detection roller. And a magnetic detection switch that is arranged so that the presence or absence of magnetism detection from the second detection magnet is switched, and transmits the detection signal corresponding to one of the presence or absence of the magnetism detection. A main rope abnormality detecting device.   When the detection roller is disposed at the initial position, a weight is attached to a part of the outer peripheral surface located below the detection roller axis in the vertical direction, and returns the detection roller to the initial position. 6. The main rope abnormality detection device according to claim 5, wherein: The weight is a magnet,
7. The main rope abnormality detection device according to claim 6, wherein the fixed-side position holding magnet is disposed so as to magnetically attract the magnet and position the detection roller at an initial position.   The main rope abnormality according to any one of claims 1 to 7, wherein the detection member is disposed on a side opposite to a car sheave on which the main rope is stretched. Detection device. An elevator device comprising a main rope abnormality detection device and an elevator control panel,
The main rope abnormality detection device is a main rope abnormality detection device according to any one of claims 1 to 8,
The elevator control panel, upon receiving the detection signal, when storing the position of the car at the time of receiving continued lifting operation of the car, and again passes through the position of the car to the elevator control panel is stored, when receiving the detection signal again, to diagnose operation for raising and lowering the car so as to pass through the position of the stored the car, the main ropes upon receipt of the detection signal from the displacement detecting means in the diagnostic operation An elevator apparatus characterized by determining that there is an abnormality.

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