Solidified oil detection device for elevator

Abstract

To provide a solidified oil detecting device capable of further surely grasping a sticking state of solidified oil to a rope of an elevator.SOLUTION: A solidified oil detection device 22 for an elevator includes a detector 26 and a detection switch. In the detection body 26, a part along an effective cross section is provided with a gap g1 from the effective cross section of the rope of the elevator such as the speed governor rope 19. The effective cross-section of the rope is the shape of the rope projected onto a plane perpendicular to the longitudinal direction. The detection switch detects a displacement of the detector 26 larger than a preset threshold value.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a solidified oil detection device for an elevator. [Background technology]

[0002] Patent Document 1 discloses an example of an elevator governor. The governor includes a removal device for removing solidified oil from the rope and sheave. The removal device includes a first opposing portion facing a first side surface on which the operating piece of the sheave is provided, a second opposing portion facing a second side surface of the sheave facing in the opposite direction from the first side surface, and a third opposing portion facing the rope. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-160921 Summary of the Invention [Problem to be solved by the invention]

[0004] In elevators, oil seeping out of the rope can solidify, causing malfunctions of switches and other devices, as well as noise and vibration. In response to this, the removal device in Patent Document 1 removes solidified oil using three linear opposing sections. The gap between the opposing sections and the rope increases with distance from the closest point to the opposing section toward the axial direction of the sheave. Therefore, solidified oil that hits the opposing section may escape into the gap and remain attached to the rope. The speed governor in Patent Document 1 does not monitor the state of solidified oil adhesion, which could lead to problems caused by solidified oil.

[0005] The present disclosure is directed to solving such problems, and provides a solidified oil detection device that can more reliably grasp the state of solidified oil adhesion to elevator ropes. [Means for solving the problem]

[0006] The solidified oil detection device of the present disclosure comprises a first detection body in which an effective cross section of an elevator rope is defined as the shape of the rope projected onto a plane perpendicular to the longitudinal direction, and a first detection portion is provided along the effective cross section with a predetermined first gap from the effective cross section of the rope, and a first detector that detects a displacement of the first detection body that is greater than a predetermined first displacement. [Effects of the Invention]

[0007] The solidified oil detection device according to the present disclosure makes it possible to more reliably grasp the state of solidified oil adhesion to elevator ropes. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a configuration diagram of an elevator according to a first embodiment. [Figure 2] 1 is a top view of a solidified oil detection device according to embodiment 1. FIG. [Figure 3] 1 is a side view of a solidified oil detection device according to a first embodiment. [Figure 4] 4 is a flowchart showing an example of the operation of the solidified oil detection device according to the first embodiment. [Figure 5] 1 is a hardware configuration diagram of a main part of a solidified oil detection device according to embodiment 1. FIG. [Figure 6] FIG. 10 is a perspective view of a sensing element according to a second embodiment. [Figure 7] FIG. 11 is a perspective view of a governor sheave according to a third embodiment. [Figure 8] FIG. 10 is a schematic side view of a solidified oil detection device according to a third embodiment. [Figure 9] FIG. 10 is a configuration diagram of an elevator according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] The following describes embodiments of the subject matter of the present disclosure with reference to the accompanying drawings. In each drawing, identical or corresponding parts are designated by the same reference numerals, and redundant explanations are appropriately simplified or omitted. Note that the subject matter of the present disclosure is not limited to the following embodiments, and any component of the embodiments may be modified or omitted within the scope of the gist of the present disclosure.

[0010] Embodiment 1 FIG. 1 is a configuration diagram of an elevator 1 according to the first embodiment.

[0011] The elevator 1 is applied to a building having multiple floors. A hoistway 2 for the elevator 1 is provided in the building. The hoistway 2 is a vertically long space spanning multiple floors. A pit 3 is provided at the lower end of the hoistway 2. A guide rail 4 is provided in the hoistway 2. The guide rail 4 is a rail that is arranged along the vertical direction of the hoistway 2. The elevator 1 includes a hoisting machine 5, a main rope 6, a car 7, a counterweight 8, and a control panel 9.

[0012] The hoisting machine 5 includes a drive sheave 10. The hoisting machine 5 generates a driving force for rotating the drive sheave 10, for example, by means of a motor or the like. The hoisting machine 5 is disposed, for example, at the upper or lower part of the hoistway 2. When a machine room is provided in the elevator 1, for example, above the hoistway 2, the hoisting machine 5 may be disposed in the machine room.

[0013] The main rope 6 is a device that supports the load of the car 7 and counterweight 8 in the hoistway 2. The main rope 6 is wound around the drive sheave 10 of the hoisting machine 5. The main rope 6 supports the load of the car 7 on one side of the drive sheave 10. The main rope 6 supports the load of the counterweight 8 on the other side of the drive sheave 10. The main rope 6 moves such that one side of the drive sheave 10 is wound up as the drive sheave 10 rotates. The main rope 6 is an example of a rope of the elevator 1. The drive sheave 10 is an example of a sheave around which the rope of the elevator 1 is wound.

[0014] The car 7 is a device that transports passengers and the like between multiple floors of a building by traveling up and down the hoistway 2. The counterweight 8 is a device that balances the loads acting on both sides of the drive sheave 10 between the car 7 and itself. The car 7 and counterweight 8 travel in opposite directions up and down the hoistway 2 while being guided by the guide rails 4 in conjunction with the main rope 6 that is moved by the drive sheave 10 of the hoisting machine 5.

[0015] The control panel 9 is a device that controls the operation of the car 7 of the elevator 1. The control panel 9 is an example of a control unit. The operation of the car 7 controlled by the control panel 9 includes the running of the car 7 in the hoistway 2. The control panel 9 is located, for example, at the top or bottom of the hoistway 2. If a machine room is provided in the elevator 1, the control panel 9 may be located in the machine room. In this example, the control panel 9 is directly or indirectly connected to a device external to the control panel 9 so as to be able to communicate information with the device. The control panel 9 may, for example, provide information about the operation of the car 7 to the external device. The control panel 9 may, for example, receive a control signal that controls the operation of the car 7 from the external device.

[0016] A remote monitoring device 11 is applied to the elevator 1. The remote monitoring device 11 may be an internal device of the elevator 1 or an external device applied to the elevator 1. The remote monitoring device 11 is used, for example, to monitor the status of the elevator 1 from a remote location. The remote monitoring device 11 is connected to a control panel 9, for example, so as to acquire information on the operation of the car 7. The remote monitoring device 11 is connected to a communication network 12, for example, so as to provide the acquired information on the operation of the car 7 to, for example, a manager or supervisor of the elevator 1. The communication network 12 includes, for example, wide-area networks such as the Internet or a telephone network, and local networks such as a LAN (Local Area Network). The information provided by the remote monitoring device 11 is collected, for example, by a server device installed in an information center 13 or the like. The information center 13 is a base for managing information on the elevator 1. The remote monitoring device 11 may, for example, issue a report on the status of the elevator 1 to the information center 13 or the like via the communication network 12 in accordance with the acquired information on the operation of the car 7. The remote monitoring device 11 is an example of an alarm issuing unit.

[0017] The elevator 1 is equipped with a compensating rope 14 and a compensating sheave 15. The compensating rope 14 is a device that compensates for imbalance in the weight of the main rope 6 due to the positions of the car 7 and the counterweight 8. One end of the compensating rope 14 is attached to the car 7. The other end of the compensating rope 14 is attached to the counterweight 8. The compensating rope 14 is wound around the compensating sheave 15. The compensating sheave 15 is disposed, for example, in the pit 3. The compensating sheave 15 is a device that applies tension to the compensating rope 14. The compensating rope 14 is an example of a rope of the elevator 1. The compensating sheave 15 is an example of a sheave around which the rope of the elevator 1 is wound.

[0018] The elevator 1 is equipped with a governor 16. The governor 16 is a device that prevents the car 7 from traveling at an excessive speed. The governor 16 includes a governor sheave 17, a tension wheel 18, a governor rope 19, a flyweight 20, and a governor switch 21.

[0019] The governor sheave 17 is disposed, for example, at the top of the elevator shaft 2. If a machine room is provided in the elevator 1, the governor sheave 17 may be disposed in the machine room. The tension pulley 18 is disposed, for example, at the bottom of the elevator shaft 2. In this example, the tension pulley 18 is disposed in the pit 3.

[0020] The governor rope 19 is wound around the governor sheave 17 and the tension wheel 18. The governor rope 19 is stretched in the vertical direction from the top to the bottom of the hoistway 2. Tension is applied to the governor rope 19 by the tension wheel 18. The governor rope 19 is connected to the car 7 on one side of the governor sheave 17. At this time, the governor rope 19 moves up and down the hoistway 2 in conjunction with the movement of the car 7. The governor sheave 17 rotates in conjunction with the movement of the governor rope 19. The governor rope 19 is an example of a rope of the elevator 1. The governor sheave 17 and the tension wheel 18 are each an example of a sheave around which the rope of the elevator 1 is wound.

[0021] The flyweights 20 are mounted on the governor sheave 17. In this example, the flyweights 20 are displaced by centrifugal force in accordance with the rotational speed of the governor sheave 17, expanding outward. The governor sheave 17 rotates in conjunction with the running of the car 7 via the governor sheave 17, so the amount of displacement of the flyweights 20 corresponds to the running speed of the car 7. The governor switch 21 is disposed in close proximity to the flyweights 20 so as to be adjacent to the flyweights 20 on the radially outer side. When the car 7 runs at a speed exceeding a preset reference speed, the flyweights 20 are displaced radially outward and come into contact with the governor switch 21, activating the governor switch 21. At this time, the governor switch 21 cuts off power to, for example, the hoisting machine 5.

[0022] In the elevator 1, oil seeping out from the governor rope 19 may solidify and adhere to the governor rope 19 or the governor sheave 17. If this solidified oil comes into contact with the governor switch 21 due to the rotation of the governor sheave 17 or the movement of the governor rope 19, causing the governor switch 21 to operate, power to the hoisting machine 5 will be cut off even if the speed of the car 7 is normal. If this happens, if there are passengers in the car 7, they may be trapped or otherwise injured. For this reason, the elevator 1 is equipped with a solidified oil detection device 22 that detects solidified oil adhering to the rope of the elevator 1.

[0023] In this example, the solidified oil detection device 22 is applied to the governor rope 19. The solidified oil detection device 22 may also be applied to other ropes of the elevator 1, such as the main rope 6 or the compensating rope 14. For example, when the car 7 is connected to the governor rope 19 on one side of the governor sheave 17, the solidified oil detection device 22 is disposed relative to the governor rope 19 on the other side of the governor sheave 17. For example, the solidified oil detection device 22 is disposed on the portion of the governor rope 19 that is pulled out from the governor sheave 17. For example, the solidified oil detection device 22 is disposed adjacent to the underside of the governor sheave 17. For example, when the governor sheave 17 is disposed in a machine room and the governor rope 19 is disposed in the hoistway 2 through a rope duct, the solidified oil detection device 22 is disposed adjacent to the underside of the rope duct. The solidified oil detection device 22 is attached to the guide rail 4 in the hoistway 2, for example.

[0024] The solidified oil detection device 22 includes an acquisition unit 23 and an output unit 24. The acquisition unit 23 is a unit equipped with a function to acquire information about the operation of the car 7 from a control unit such as the control panel 9. The acquisition unit 23 collects information directly or indirectly from the control panel 9. The output unit 24 is a unit equipped with a function to output a control signal to a control unit such as the control panel 9 and an alarm unit such as the remote monitoring device 11. The output unit 24 outputs a control signal directly or indirectly to the control panel 9 and the remote monitoring device 11.

[0025] FIG. 2 is a top view of the solidified oil detection device 22 according to the first embodiment.

[0026] In this example, the solidified oil detection device 22 is attached to the back of the guide rail 4. The back of the guide rail 4 is the part of the guide rail 4 opposite the guide portion that guides the car 7 or the counterweight 8, etc. The solidified oil detection device 22 comprises a base 25 and a detection body 26.

[0027] The base 25 is a part that is attached to the guide rail 4. In this example, the solidified oil detection device 22 has a processing circuit (not shown) on the base 25. A part or all of the acquisition unit 23 and the output unit 24 are implemented, for example, by the processing circuit.

[0028] The detector 26 is a component that detects solidified oil adhering to a rope such as the governor rope 19. The detector 26 is formed of an elastic material, such as rubber. The detector 26 has a cylindrical shape, for example. The detector 26 is arranged coaxially with the governor rope 19. That is, the detector 26 is arranged so that the central axis of the cylindrical shape coincides with the central axis of the governor rope 19. The detector 26 is arranged along the effective cross-section of the governor rope 19. Here, the effective cross-section of a rope such as the governor rope 19 is the shape of the rope projected onto a plane perpendicular to the longitudinal direction of the rope. The effective cross-section of a rope is, for example, a circle that includes the cross-sectional shape of the rope, with the central axis of the rope as its center and the outer diameter of the rope as its diameter. The detector 26 is arranged along the effective cross-section of the governor rope 19, with a predetermined gap g1 between it and the effective cross-section. The detector 26 is an example of a first detector. Furthermore, the portion of the first sensing body that follows the execution cross section with gap g1 therebetween is an example of a first sensing portion. In this example sensing body 26, the inner surface of the cylindrical shape is an example of a first sensing portion. Gap g1 is an example of a first gap.

[0029] A mounting slit 27 is provided in the sensing body 26. The mounting slit 27 is provided on the side surface of the sensing body 26 so as to extend from one end to the other end in the axial direction of the sensing body 26. In this example, the mounting slit 27 is a slit that runs along the axial direction of the sensing body 26. The mounting slit 27 may be, for example, a slit that is provided at an angle with respect to the axial direction of the sensing body 26, or may be a wavy slit, so that the sensing body 26 runs along the entire periphery of the effective cross section of the governor rope 19 on a projection plane perpendicular to the axial direction of the sensing body 26. The sensing body 26 is arranged around the governor rope 19 by expanding the mounting slit 27 within the range of elastic deformation and passing the governor rope 19 through it.

[0030] FIG. 3 is a side view of the solidified oil detection device 22 according to the first embodiment.

[0031] The solidified oil detection device 22 includes a connecting portion 28 , a support portion 29 , a support spring 30 , a detection switch 31 , and a stop switch 32 .

[0032] The connecting portion 28 is a portion that is connected to the detection body 26. The connecting portion 28 moves integrally with the detection body 26. In this example, the connecting portion 28 includes a main body 33 that is long in the vertical direction, and a connecting arm 34 that protrudes from the main body 33 toward the detection body 26. The connecting portion 28 is connected to the detection body 26 at the tip of the connecting arm 34.

[0033] The support portion 29 is a portion that supports the detector 26 connected to the connecting portion 28. The support portion 29 is attached to the base portion 25. The support portion 29 is disposed so as to protrude from the guide rail 4 to which the base portion 25 is attached toward the governor rope 19. The support portion 29 is, for example, a plate-shaped member. In this example, the support portions 29 are provided both above and below the connecting portion 28. The upper support portion 29 supports the connecting portion 28 from above via a support spring 30 disposed between the upper end of the main body portion 33 of the connecting portion 28. The lower support portion 29 supports the connecting portion 28 from above via a support spring 30 disposed between the upper end of the main body portion 33 of the connecting portion 28. The upper and lower support springs 30 maintain the position of the connecting portion 28 in a balanced position by their elastic forces. The upper and lower support portions 29 limit the vertical displacement of the connecting portion 28. The connecting portion 28 may be guided by a guide (not shown) or the like so that the direction of movement is limited to the vertical direction. In this case, the guide is disposed across the upper and lower support portions 29, for example.

[0034] The detection switch 31 is a device that detects the displacement of the detection body 26 when the displacement is greater than a preset threshold. The detection switch 31 is, for example, a limit switch that detects the tilt of the actuator 35. The threshold of the detection switch 31 is, for example, a displacement equivalent to the play of the actuator 35. In this example, the detection switch 31 is attached to the base 25 with the actuator 35 facing the detection body 26. The actuator 35 of the detection switch 31 is connected to the detection body 26. When the detection body 26 displaces relative to the base 25, the detection switch 31 detects a displacement of the detection body 26 that is greater than the threshold based on the tilt of the actuator 35 that accompanies the displacement of the detection body 26. This threshold is an example of a first displacement. The detection switch 31 is an example of a first detector. In this example, the upper and lower support portions 29 of the connecting portion 28 are arranged to limit the displacement of the detection body 26 to a range that prevents excessive tilt of the actuator 35. This prevents damage to the detection switch 31 due to a large displacement of the detection body 26.

[0035] The stop switch 32 is a device that detects the displacement of the detection body 26 when the displacement is greater than a preset threshold. The stop switch 32 is, for example, a limit switch that detects contact of the main body 33 of the connecting portion 28. The threshold of the stop switch 32 is set greater than the threshold of the detection switch 31. The threshold of the stop switch 32 is, for example, the displacement of the connecting portion 28 from its equilibrium position until it contacts either the upper or lower support portion 29. In this example, the stop switch 32 is attached to both the upper and lower support portions 29. The upper stop switch 32 is disposed above the upper end of the main body 33 of the connecting portion 28. The lower stop switch 32 is disposed below the lower end of the main body 33 of the connecting portion 28. When the detection body 26 is displaced significantly relative to the base 25, the upper and lower stop switches 32 detect a displacement of the detection body 26 greater than the threshold by contact of the connecting portion 28 connected to the detection body 26. This threshold is an example of a third displacement. In this case, the upper and lower stop switches 32 are an example of a third detector.

[0036] Continuing with reference to FIG. 3, an example of detection of solidified oil by the solidified oil detection device 22 will be described.

[0037] Oil may seep out and solidify on the governor rope 19. Such solidified oil adheres to the surface of the governor rope 19 and moves along with the governor rope 19.

[0038] When the amount of solidified oil adhering to the surface of the governor rope 19 is sufficiently small, the thickness of the solidified oil on the surface of the governor rope 19 is smaller than the gap g1 between the effective cross section of the governor rope 19 and the inner surface of the detector 26. In this case, the solidified oil moving with the governor rope 19 passes between the inner surfaces of the governor rope 19 and the detector 26 without coming into contact with the inner surface of the detector 26. In this case, the detector 26 does not displace, so the detection switch 31 and the stop switch 32 do not operate.

[0039] As the amount of solidified oil increases, the thickness of the solidified oil on the surface of the governor rope 19 exceeds the gap g1 between the effective cross section of the governor rope 19 and the inner surface of the detector 26. At this time, the solidified oil moving with the governor rope 19 comes into contact with the inner surface of the detector 26, displacing the detector 26 vertically. The detector switch 31 detects the displacement of the detector 26 based on the tilt of the actuator 35 connected to the detector 26. When the amount of solidified oil adhering to the detector 26 is moderate, the contact with the detector 26 evens out the thickness of the solidified oil to approximately equal to or less than the gap g1. Therefore, after the detector 26 is displaced vertically, the restoring forces of the upper and lower support springs 30 return it to its equilibrium position. If the detector 26 is displaced to a degree that the connecting portion 28 connected to the detector 26 does not come into contact with the upper and lower stop switches 32, the stop switches 32 will not operate.

[0040] When the detection switch 31 is activated, the output unit 24 outputs a control signal to the remote monitoring device 11 to notify the detection of solidified oil. Based on the control signal, the remote monitoring device 11 issues a report to, for example, the information center 13, that solidified oil has been detected on the governor rope 19. After the report is issued, a maintenance worker is dispatched to the building where the elevator 1 is located to remove the solidified oil before it accumulates further. Here, the amount of solidified oil detected is not enough to interfere with the operation of the elevator 1, so the elevator 1 continues to operate normally even after the report is issued.

[0041] As the amount of solidified oil further increases, the thickness of the solidified oil on the surface of the governor rope 19 exceeds the gap g1 between the effective cross section of the governor rope 19 and the inner surface of the detection body 26. At this time, the solidified oil moving along with the governor rope 19 comes into contact with the inner surface of the detection body 26, displacing the detection body 26 in the vertical direction. The detection switch 31 detects the displacement of the detection body 26 based on the tilt of the actuator 35 connected to the detection body 26. Here, if the amount of solidified oil adhering exceeds a medium level, the detection body 26, along with the governor rope 19, is significantly displaced by the adhering solidified oil. At this time, the connecting part 28 connected to the detection body 26 comes into contact with either the upper or lower stop switch 32, and the stop switch 32 detects a displacement of the detection body 26 that is greater than the threshold value.

[0042] When stop switch 32 is activated, output unit 24 outputs a control signal to control panel 9 to stop car 7 at the nearest floor. Based on the control signal, control panel 9 stops car 7 at the nearest floor and, if any passengers are on board, allows them to disembark from car 7. Control panel 9 then suspends operation of elevator 1 until maintenance workers arrive to remove the solidified oil, etc. Remote monitoring device 11 may issue a report to, for example, information center 13, that car 7 has been stopped at the nearest floor and operation of elevator 1 has been suspended.

[0043] Next, an example of the operation of the solidified oil detection device 22 will be described with reference to FIG. FIG. 4 is a flowchart showing an example of the operation of the solidified oil detection device 22 according to the first embodiment.

[0044] In step S1, the acquisition unit 23 acquires information on the operation of the car 7 from the control panel 9. Thereafter, the processing of the solidified oil detection device 22 proceeds to step S2.

[0045] In step S2, the output unit 24 determines whether the detection switch 31 has been activated. If the detection switch 31 has not been activated, the process of the solidified oil detection device 22 proceeds to step S1. On the other hand, if the detection switch 31 has been activated, the process of the solidified oil detection device 22 proceeds to step S3.

[0046] In step S3, the output unit 24 determines whether the car 7 is traveling or stopped based on the information acquired by the acquisition unit 23. If the car 7 is stopped, the processing of the solidified oil detection device 22 proceeds to step S4. On the other hand, if the car 7 is traveling, the processing of the solidified oil detection device 22 proceeds to step S5.

[0047] In step S4, the output unit 24 determines that the displacement of the detection object 26 is due to shaking such as an earthquake in the elevator 1. At this time, the output unit 24 outputs a control signal indicating the occurrence of shaking such as an earthquake to one or both of the control panel 9 and the remote monitoring device 11. For example, based on the control signal, the control panel 9 stops the car 7 at the nearest floor and, if there are passengers on board, allows the passengers to disembark from the car 7. For example, based on the control signal, the remote monitoring device 11 notifies the information center 13 or the like of the occurrence of shaking such as an earthquake. Thereafter, the processing of the solidified oil detection device 22 ends.

[0048] In step S5, the output unit 24 determines that the displacement of the detection body 26 is due to solidified oil. The output unit 24 outputs a control signal to the remote monitoring device 11 to notify the detection of solidified oil. Based on the control signal, the remote monitoring device 11 notifies the information center 13 or the like that solidified oil has been detected in the governor rope 19. Thereafter, the processing of the solidified oil detection device 22 proceeds to step S6.

[0049] In step S6, the output unit 24 determines whether the stop switch 32 has been activated. If the stop switch 32 has not been activated, the process of the solidified oil detection device 22 proceeds to step S1. On the other hand, if the stop switch 32 has been activated, the process of the solidified oil detection device 22 proceeds to step S7.

[0050] In step S7, the output unit 24 outputs a control signal to the control panel 9 to stop the car 7 at the nearest floor. Based on the control signal, the control panel 9 stops the car 7 at the nearest floor and, if there are passengers on board, allows the passengers to disembark from the car 7. Thereafter, the processing of the solidified oil detection device 22 ends.

[0051] As described above, the solidified oil detection device 22 for the elevator 1 according to the first embodiment includes the detector 26 and the detector switch 31. The detector 26 has a portion that follows the effective cross-section of the elevator 1 rope, such as the governor rope 19, with a gap g1 between them. The effective cross-section of the rope is the shape of the rope projected onto a plane perpendicular to its longitudinal direction. The detector switch 31 detects displacement of the detector 26 greater than a preset threshold. This configuration allows the detector 26 to have a portion that follows the shape of the elevator 1 rope, and the detector switch 31 is activated when solidified oil strikes this portion. This allows for more accurate detection of the adhesion of solidified oil to the elevator 1 rope. Since the adhesion of solidified oil is detected, malfunctions of the governor switch 21 due to solidified oil are reduced. This reduces the likelihood of unnecessary emergency stops of the elevator 1 and the risk of entrapment. It also reduces a decrease in the operating rate of the elevator 1. When a section of the rope with solidified oil adheres passes through a sheave, noise or vibration may occur. The solidified oil detection device 22 detects the state of solidified oil adhesion, thereby suppressing the occurrence of such noise or vibration. This further improves the comfort of the elevator 1.

[0052] Furthermore, the detector 26 is a cylindrical body arranged coaxially with the rope so that at least a portion of its inner surface is aligned with the effective cross section, leaving a gap g1. The first detection switch detects the displacement of the detector 26 in the axial direction of the detector 26. With this configuration, the detector 26 is arranged to surround the rope of the elevator 1, making it possible to detect solidified oil regardless of the position where it is attached. This allows the state of solidified oil attachment to be more reliably grasped.

[0053] Furthermore, an attachment slit 27 is provided on the side surface of the detection body 26, extending from one end to the other in the axial direction of the detection body 26. The detection body 26 has enough elasticity to expand the attachment slit 27 within the range of elastic deformation. This configuration makes it easy to arrange the detection body 26 around the rope.

[0054] The rope on which the solidified oil detection device 22 is provided is, for example, the governor rope 19. The governor rope 19 is wound around the governor sheave 17. The governor rope 19 is connected to the car 7 on one side of the governor sheave 17. The detector 26 is disposed on the governor rope 19 on the other side of the governor sheave 17. In the elevator 1, the car 7 may move to each floor starting from a reference floor, such as an entrance floor leading to the ground. When the car 7 ascends from the reference floor, the governor rope 19 on the side connected to the car 7 relative to the governor sheave 17 passes through the governor sheave 17 and is pulled out to the opposite side. Solidified oil seeping out from the governor rope 19 may adhere to the governor sheave 17 when it is bent at the governor sheave 17. Furthermore, the solidified oil that has adhered to the governor sheave 17 may re-adhere to the governor rope 19 and be pulled out together with the governor rope 19. Thereafter, when the car 7 returns to the reference floor, the re-adhered solidified oil that has been pulled out together with the governor rope 19 passes through the governor sheave 17 again. The solidified oil detection device 22 can detect such solidified oil before it reaches the governor sheave 17, and therefore can more effectively prevent malfunctions such as the malfunction of the governor switch 21 due to solidified oil that has appeared on the surface due to bending of the rope, etc.

[0055] The solidified oil detection device 22 also includes a stop switch 32 and an output unit 24. The stop switch 32 detects displacement of the detection body 26 that is greater than a preset threshold. The threshold of the stop switch 32 is greater than the threshold of the detection switch 31. When the detection switch 31 is activated, the output unit 24 outputs a control signal to the remote monitoring device 11 to notify the detection of solidified oil. When the stop switch 32 is activated, the output unit 24 outputs a control signal to the control panel 9 to stop the car 7 at the nearest floor. This configuration makes it possible to respond according to the level of urgency determined by the amount of solidified oil adhering to the elevator 1. This reduces both the decrease in the operating rate of the elevator 1 and the possibility of malfunctions caused by solidified oil.

[0056] The solidified oil detection device 22 also includes an acquisition unit 23 and an output unit 24. When the detection switch 31 is activated while the acquisition unit 23 has acquired information from the control panel 9 that the car 7 is stopped, the output unit 24 outputs a control signal indicating the occurrence of shaking in the elevator 1 to the control panel 9 or the remote monitoring device 11. With this configuration, the solidified oil detection device 22 can determine whether the displacement of the detection body 26 is due to shaking such as an earthquake or the adhesion of solidified oil, depending on the operating status of the elevator 1. This further improves the detection accuracy of the solidified oil detection device 22.

[0057] Next, an example of the hardware configuration of the solidified oil detection device 22 will be described with reference to FIG. FIG. 5 is a hardware configuration diagram of the main part of the solidified oil detection device 22 according to the first embodiment.

[0058] Each function of the solidified oil detection device 22 may be realized by a processing circuit. The processing circuit includes at least one processor 100 a and at least one memory 100 b. The processing circuit may include at least one dedicated hardware 200 in addition to or in place of the processor 100 a and the memory 100 b.

[0059] When the processing circuit includes a processor 100a and a memory 100b, the functions of the solidified oil detection device 22 are realized by software, firmware, or a combination of software and firmware. At least one of the software and firmware is written as a program. The program is stored in the memory 100b. The processor 100a realizes the functions of the solidified oil detection device 22 by reading and executing the program stored in the memory 100b. The program may be a program package including multiple subprograms, modules, libraries, or the like. The program may be a product itself, such as a program product, or may be included in the product.

[0060] The processor 100a is also called a CPU (Central Processing Unit), processing device, arithmetic unit, microprocessor, microcomputer, or DSP. The memory 100b is configured by, for example, a non-volatile or volatile semiconductor memory such as RAM, ROM, flash memory, EPROM, or EEPROM.

[0061] Where the processing circuitry comprises dedicated hardware 200, the processing circuitry may be implemented, for example, as a single circuit, multiple circuits, a programmed processor, parallel programmed processors, an ASIC, an FPGA, or a combination thereof.

[0062] Each function of the solidified oil detection device 22 can be realized by a processing circuit. Alternatively, each function of the solidified oil detection device 22 can be realized collectively by a processing circuit. Some of the functions of the solidified oil detection device 22 may be realized by dedicated hardware 200, and other parts may be realized by software or firmware. In this way, the processing circuit realizes each function of the solidified oil detection device 22 by dedicated hardware 200, software, firmware, or a combination of these.

[0063] Embodiment 2 In the second embodiment, differences from the example disclosed in the first embodiment will be described in particular detail. For features not described in the second embodiment, any of the features of the example disclosed in the first embodiment may be adopted.

[0064] FIG. 6 is a perspective view of the sensing object 26 according to the second embodiment.

[0065] The sensing body 26 has a cylindrical shape with a narrowed center. The sensing body 26 is arranged coaxially with the governor rope 19. The sensing body 26 is arranged so that the inner surface of the central part is along the effective cross-section of the governor rope 19 with a gap g1 therebetween. In the sensing body 26 of this example, the inner surface of the cylindrical central part is an example of a first sensing part. The sensing body 26 has a tapered shape on the inner surface, with the inner diameter expanding from the central part toward at least one end in the axial direction. In this example, the sensing body 26 has a tapered shape on the inner surface, with the inner diameter expanding from the central part toward both ends in the axial direction.

[0066] The connecting part 28 is connected to the detection body 26 and moves integrally with the detection body 26. In this example, the connecting part 28 is connected to the detection body 26 at the tip of the connecting arm 34. The connecting part 28 is attached to the base 25 via an elastic body such as a spring. The spring keeps the position of the connecting part 28 at an equilibrium position by its elastic force. The connecting part 28 may be guided by a guide (not shown) or the like so that the direction of movement is limited to the horizontal direction.

[0067] The detection switch 31 detects the displacement of the detection body 26 when the displacement is greater than a preset threshold. The detection switch 31 is, for example, a limit switch that detects the displacement of the actuator 35. The threshold of the detection switch 31 is, for example, a displacement equivalent to the play of the actuator 35. In this example, the detection switch 31 is attached to the base 25 with the actuator 35 facing the detection body 26. The actuator 35 of the detection switch 31 is connected to the detection body 26. When the detection body 26 is displaced relative to the base 25, the detection switch 31 detects a displacement of the detection body 26 that is greater than the threshold due to the displacement of the actuator 35 accompanying the displacement of the detection body 26.

[0068] When a moderate or larger amount of solidified oil adheres to the governor rope 19, the thickness of the solidified oil on the surface of the governor rope 19 exceeds the gap g1 between the effective cross section of the governor rope 19 and the inner surface of the detector 26. At this time, the solidified oil moving along with the governor rope 19 comes into contact with the inner surface of the detector 26, displacing the detector 26 in a horizontal plane perpendicular to the axial direction due to the inclination of the tapered shape of the inner surface. The detector switch 31 detects the displacement of the detector 26 by the displacement of the actuator 35 connected to the detector 26. The output unit 24 then outputs a control signal to the remote monitoring device 11 to notify the detection of solidified oil. Based on the control signal, the remote monitoring device 11 notifies, for example, the information center 13, that solidified oil has been detected on the governor rope 19.

[0069] With this configuration, the solidified oil detection device 22 can detect solidified oil by displacing the detection body 26 in a horizontal plane. This allows the solidified oil detection device 22 to be used even when there are vertical space limitations. The detection body 26 also has a drum-shaped or tapered shape with an expanding inner diameter at the end. This reduces air resistance and other factors associated with the movement of the governor rope 19, allowing the governor rope 19 to move more smoothly inside the detection body 26. The solidified oil detection device 22 may also detect solidified oil by displacing the detection body 26 in the axial direction, using a tapered detection body 26.

[0070] Embodiment 3 In the third embodiment, differences from the examples disclosed in the first or second embodiment will be described in particular detail. For features not described in the third embodiment, any of the features of the examples disclosed in the first or second embodiment may be adopted.

[0071] FIG. 7 is a perspective view of a governor sheave 17 according to the third embodiment.

[0072] A sheave groove 36 is provided in the governor sheave 17. The sheave groove 36 is a groove around which the governor rope 19 is wound. A sheave ear 37 is provided in the governor sheave 17. The sheave ear 37 is a flange-shaped portion that expands radially outside the sheave groove 36. That is, in the governor sheave 17, the sheave groove 36 is provided between the sheave ears 37.

[0073] The solidified oil detection device 22 is positioned relative to the portion of the governor rope 19 that is wound around the governor sheave 17. The solidified oil detection device 22 may be positioned in the drive sheave 10, the compensator sheave 15, the tensioner 18, or any other sheave of the elevator 1. In this example, the solidified oil detection device 22 is positioned relative to the top of the governor sheave 17.

[0074] FIG. 8 is a schematic side view of the solidified oil detection device 22 according to the third embodiment.

[0075] The detector 26 is a flat member attached to the base 25 and disposed facing the governor sheave 17. The detector 26 is rotatably attached to the base 25, for example, by a hinge, so that the opposite end of the detector 26 can be displaced in the rotational direction of the governor sheave 17. The detector 26 has a portion at its opposite end from the base 25 that is spaced a gap g1 from the effective cross-section of the governor rope 19 and that follows the exposed portion of the effective cross-section that does not engage with the sheave groove 36. This portion is an example of a first detector. The detector 26 also has a portion at its opposite end from the base 25 that follows the sheave lug 37 and that is spaced a gap g2 from the sheave lug 37. This portion is an example of a second detector. The gap g2 is an example of a second gap. The size of the gap g2 may be approximately the same as or different from the size of the gap g1.

[0076] The detection switch 31 detects the displacement of the detection body 26 when the displacement is greater than a preset threshold. The detection switch 31 is, for example, a limit switch that detects the inclination of the detection body 26 relative to the base 25. The threshold of the detection switch 31 is, for example, a displacement equivalent to the play of the detection body 26. The detection switch 31 is activated when the detection body 26 is displaced and inclined relative to the base 25 by a displacement greater than the threshold, and detects the displacement.

[0077] When a moderate or greater amount of solidified oil adheres to the governor rope 19, the thickness of the solidified oil on the surface of the governor rope 19 exceeds the gap g1 between the effective cross section of the governor rope 19 and the detector 26. Furthermore, when a moderate or greater amount of solidified oil adheres to the governor sheave 17, the thickness of the solidified oil on the surface of the governor sheave 17 exceeds the gap g2 between the sheave lug 37 and the detector 26. At this time, the solidified oil moving with the governor rope 19 or the governor sheave 17 comes into contact with and displaces the detector 26, activating the detection switch 31. The output unit 24 then outputs a control signal to the remote monitoring device 11 to notify the detection of solidified oil. Based on the control signal, the remote monitoring device 11 notifies, for example, the information center 13, that solidified oil has been detected on the governor rope 19.

[0078] With this configuration, the solidified oil detection device 22 can detect solidified oil adhering to the governor sheave 17. Furthermore, because the governor rope 19 is wound around the governor sheave 17, it is less susceptible to the effects of the governor rope 19's swaying. This reduces the possibility of a decrease in the accuracy of solidified oil detection due to the swaying of the governor rope 19. This makes it possible to more reliably grasp the state of solidified oil adhesion.

[0079] Embodiment 4 In the fourth embodiment, differences from the examples disclosed in the first to third embodiments will be described in particular detail. For features not described in the fourth embodiment, any of the features of the examples disclosed in the first to third embodiments may be adopted.

[0080] FIG. 9 is a configuration diagram of the elevator 1 according to the fourth embodiment.

[0081] The solidified oil detector 22 includes a detector 26a, a detector 26b, a detector switch 31a, and a stop switch 32b.

[0082] The detector 26a and the detector switch 31a are disposed at a portion of the governor rope 19 that is wound around the governor sheave 17. The detector 26a and the detector switch 31a are configured, for example, similarly to the detector 26 and the detector switch 31 shown in FIG. 8. Here, the detector 26a has a portion at the end opposite the base 25 that is spaced a gap g1 from the effective cross section of the governor rope 19 and that follows the exposed portion of the effective cross section that does not engage with the sheave groove 36. This portion is an example of a first detector. The detector switch 31a detects the displacement of the detector 26a when the displacement is greater than a preset threshold value. This threshold value is an example of a first displacement.

[0083] The detector 26b and the stop switch 32b are disposed at a location where the governor rope 19 is pulled out from the governor sheave 17. The detector 26b and the stop switch 32b are configured similarly to the detector 26 and the detector switch 31 having the actuator 35 shown in FIG. 3 . The detector 26b has a portion that follows the effective cross section of the governor rope 19 with a gap g4 therebetween. This portion is an example of a fourth detector. The gap g4 is larger than the gap g1. The stop switch 32b detects the displacement of the detector 26b when the displacement is larger than a preset threshold. This threshold is an example of a fourth displacement. The fourth displacement may be approximately the same as the first displacement or may be larger than the first displacement.

[0084] When the amount of solidified oil adhering to the governor rope 19 is sufficiently small, the thickness of the solidified oil on the surface of the governor rope 19 is smaller than both gap g1 and gap g4. At this time, the solidified oil moving along with the governor rope 19 does not come into contact with either the detector 26a or the detector 26b. In this case, the detector 26a and the detector 26b do not displace, so the detector switch 31a and the stop switch 32b do not operate.

[0085] As the amount of solidified oil adhering to the speed governor rope 19 increases, the thickness of the solidified oil on the surface of the speed governor rope 19 exceeds the gap g1 between the effective cross section of the speed governor rope 19 and the detector 26a. At this time, the solidified oil moving with the speed governor rope 19 comes into contact with the detector 26a, displacing it. The detector switch 31a is activated by the displacement of the detector 26a. Here, when the amount of solidified oil adhering to the speed governor rope 19 is moderate, the thickness of the solidified oil on the surface of the speed governor rope 19 is smaller than the gap g4 between the effective cross section of the speed governor rope 19 and the detector 26b. Therefore, the stop switch 32b does not activate.

[0086] When detection switch 31a is activated, output unit 24 outputs a control signal to remote monitoring device 11 to notify that solidified oil has been detected. Based on the control signal, remote monitoring device 11 issues a report to information center 13, for example, that solidified oil has been detected in governor rope 19. After the report is issued, maintenance workers are dispatched to the building where elevator 1 is located to remove the solidified oil before it accumulates further. Here, the amount of solidified oil detected is not enough to interfere with the operation of elevator 1, so elevator 1 continues normal operation even after the report is issued.

[0087] As the amount of solidified oil continues to increase, the thickness of the solidified oil on the surface of the governor rope 19 exceeds the gap g4 between the effective cross section of the governor rope 19 and the detection body 26b. At this time, the solidified oil moving with the governor rope 19 comes into contact with the inner surface of the detection body 26b, displacing the detection body 26b in the vertical direction. The stop switch 32b detects the displacement of the detection body 26b by the tilt of the actuator 35 connected to the detection body 26b.

[0088] When stop switch 32b is activated, output unit 24 outputs a control signal to control panel 9 to stop car 7 at the nearest floor. Based on the control signal, control panel 9 stops car 7 at the nearest floor and, if any passengers are on board, allows them to disembark from car 7. Control panel 9 then suspends operation of elevator 1 until maintenance workers arrive to remove the solidified oil, etc. Remote monitoring device 11 may issue a report to, for example, information center 13, that car 7 has been stopped at the nearest floor and operation of elevator 1 has been suspended.

[0089] This configuration makes it possible to respond according to the level of urgency based on the amount of solidified oil adhering. This reduces both the decrease in elevator 1 operation rate and the possibility of malfunctions caused by solidified oil. Furthermore, the portion of the governor rope 19 wound around the governor sheave 17 is less susceptible to the influence of the governor rope 19's swaying. Therefore, even when a relatively narrow gap g1 is applied, false detection of solidified oil is less likely to occur, and the adhesion of solidified oil can be detected more quickly. Furthermore, the portion of the governor rope 19 pulled out from the governor sheave 17 is exposed, with the entire circumference of the governor rope 19 not wrapped around the governor sheave 17. This allows for more reliable detection of solidified oil regardless of the location of adhesion.

[0090] The output unit 24 and the acquisition unit 23 may be provided in proximity to both the detection element 26a and the detection element 26b. The output unit 24 and the acquisition unit 23 may be provided in proximity to either the detection element 26a or the detection element 26b. The output unit 24 and the acquisition unit 23 may be provided in a position remote from either the detection element 26a or the detection element 26b. In this case, the devices of the solidified oil detection device 22 communicate information with each other directly or indirectly by wired or wireless signals.

[0091] Furthermore, the detector 26a and the detector 26b may be disposed at the same location on the governor rope 19. For example, the detector 26a and the detector 26b may be two cylindrical bodies that have different inner diameters and are adjacent to each other in the vertical direction.

[0092] To summarize the above explanation, possible configurations of the technology according to the present disclosure include the configurations listed below as appendices. (Appendix 1) a first detection body in which an effective cross section of an elevator rope is defined as a shape obtained by projecting the rope onto a plane perpendicular to the longitudinal direction, and a first detection unit is provided along the effective cross section of the rope with a first gap set in advance from the effective cross section of the rope; a first detector that detects a displacement of the first detection object that is larger than a predetermined first displacement; A solidified oil detection device comprising: (Appendix 2) the first detection body is a cylindrical body arranged coaxially with the rope so that at least a part of the inner surface thereof becomes the first detection portion, the first detector detects a displacement in the axial direction of the first detection body that is greater than the first displacement; 10. The solidified oil detection device of claim 1. (Appendix 3) the first detection body is a cylindrical body arranged coaxially with the rope so that at least a part of the inner surface thereof becomes the first detection portion, the first detection body has a tapered shape in which an inner diameter increases from the first detection portion toward at least one end in the axial direction of the first detection body, The first detector detects a displacement that is greater than the first displacement in a direction perpendicular to the axial direction of the first detection body. 10. The solidified oil detection device of claim 1. (Appendix 4) the first sensing element has elasticity, A mounting slit is provided on a side surface of the first detection body, the mounting slit extending from one end to the other end in the axial direction of the first detection body. 4. A solidified oil detection device according to claim 2 or 3. (Appendix 5) the rope is a governor rope that is wound around a governor sheave and connected to the elevator car on one side of the governor sheave, The first detection body is disposed relative to the rope on the other side of the governor sheave. 5. A solidified oil detection device according to any one of claims 1 to 4. (Appendix 6) The rope is wound around a sheave having sheave grooves between the sheave ears, The first detection body is disposed relative to a portion of the rope that is wound around the sheave, In the first detection body, a second detection portion is provided along the sheave ear with a predetermined second gap from the sheave ear, 10. The solidified oil detection device of claim 1. (Appendix 7) a third detector that detects a displacement of the first detection object that is larger than a third displacement that is preset as a displacement larger than the first displacement; an output unit that outputs a control signal to a notification unit that notifies the elevator status and outputs a control signal to a control unit that controls the operation of the elevator car; Equipped with The output unit outputs a control signal to the alarm unit to notify the detection of solidified oil when the first detector detects a displacement greater than the first displacement, the output unit outputs a control signal to the control unit to stop the car at the nearest floor when the third detector detects a displacement greater than the third displacement. 10. The solidified oil detection device of claim 1. (Appendix 8) a fourth detection body having a fourth detection portion provided along the effective cross section of the rope with a fourth gap set in advance as a gap larger than the first gap; a fourth detector that detects a displacement of the fourth detection body that is larger than a predetermined fourth displacement; an output unit that outputs a control signal to a notification unit that notifies the elevator status and outputs a control signal to a control unit that controls the operation of the elevator car; Equipped with The output unit outputs a control signal to the alarm unit to notify the detection of solidified oil when the first detector detects a displacement greater than the first displacement, the output unit outputs a control signal to the control unit to stop the car at the nearest floor when the fourth detector detects a displacement greater than the fourth displacement. 10. The solidified oil detection device of claim 1. (Appendix 9) The first detection body is disposed relative to a portion of the rope wound around the sheave, The fourth detection body is disposed with respect to one side of the rope pulled out from the sheave. 10. The solidified oil detection device of claim 8. (Appendix 10) an acquisition unit that acquires information about the operation of the elevator car from a control unit that controls the operation of the elevator car; an output unit that outputs a control signal to an alarm unit that issues an elevator status alert; Equipped with The output unit outputs a control signal indicating the occurrence of shaking in the elevator to at least one of the control unit and the alarm issuing unit when the first detector detects a displacement greater than the first displacement while the acquisition unit acquires information that the car is stopped. 10. The solidified oil detection device of claim 1. [Explanation of symbols]

[0093] 1 elevator, 2 hoistway, 3 pit, 4 guide rail, 5 hoist, 6 main rope, 7 cage, 8 counterweight, 9 control panel, 10 drive sheave, 11 remote monitoring device, 12 communication network, 13 information center, 14 compensating rope, 15 compensating sheave, 16 governor, 17 governor sheave, 18 tension wheel, 19 governor rope, 20 flyweight, 21 governor switch, 22 solidified oil detection device, 23 acquisition unit, 24 output unit, 25 base, 26, 26a, 26b detection body, 27 mounting slit, 28 connection unit, 29 support unit, 30 support spring, 31, 31a detection switch, 32, 32b Stop switch, 33 main body, 34 connecting arm, 35 actuator, 36 sheave groove, 37 sheave ear, 100a processor, 100b memory, 200 dedicated hardware

Claims

1. a first detection body in which an effective cross section of an elevator rope is defined as a shape obtained by projecting the rope onto a plane perpendicular to the longitudinal direction, and a first detection unit is provided along the effective cross section of the rope with a predetermined first gap therebetween; a first detector that detects a displacement of the first detection object that is larger than a predetermined first displacement; A solidified oil detection device comprising:

2. the first detection body is a cylindrical body arranged coaxially with the rope so that at least a part of the inner surface thereof becomes the first detection portion, The first detector detects a displacement in the axial direction of the first detection body that is greater than the first displacement. The solidified oil detection device according to claim 1 .

3. the first detection body is a cylindrical body arranged coaxially with the rope so that at least a part of the inner surface thereof becomes the first detection portion, the first detection body has a tapered shape in which an inner diameter increases from the first detection portion toward at least one end in the axial direction of the first detection body, the first detector detects a displacement that is greater than the first displacement in a direction perpendicular to an axial direction of the first detection body; The solidified oil detection device according to claim 1 .

4. the first sensing element has elasticity, A mounting slit is provided on a side surface of the first detection body, the mounting slit extending from one end to the other end in the axial direction of the first detection body. The solidified oil detection device according to claim 2 or 3.

5. the rope is a governor rope that is wound around a governor sheave and connected to the elevator car on one side of the governor sheave, The first detector is disposed with respect to the rope on the other side of the governor sheave. The solidified oil detection device according to any one of claims 1 to 3.

6. The rope is wound around a sheave having sheave grooves between the sheave ears, The first detection body is disposed relative to a portion of the rope that is wound around the sheave, In the first detection body, a second detection portion is provided along the sheave ear with a predetermined second gap from the sheave ear. The solidified oil detection device according to claim 1 .

7. a third detector that detects a displacement of the first detection object that is larger than a third displacement that is preset as a displacement larger than the first displacement; an output unit that outputs a control signal to a notification unit that notifies the elevator status and outputs a control signal to a control unit that controls the operation of the elevator car; Equipped with The output unit outputs a control signal to the alarm unit to notify the detection of solidified oil when the first detector detects a displacement greater than the first displacement, the output unit outputs a control signal to the control unit to stop the car at a nearest floor when the third detector detects a displacement greater than the third displacement. The solidified oil detection device according to claim 1 .

8. a fourth detection body having a fourth detection portion provided along the effective cross section of the rope with a fourth gap set in advance as a gap larger than the first gap from the effective cross section of the rope; a fourth detector that detects a displacement of the fourth detection body that is larger than a predetermined fourth displacement; an output unit that outputs a control signal to a notification unit that notifies the elevator status and outputs a control signal to a control unit that controls the operation of the elevator car; Equipped with The output unit outputs a control signal to the alarm unit to notify the detection of solidified oil when the first detector detects a displacement greater than the first displacement, the output unit outputs a control signal to the control unit to stop the car at a nearest floor when the fourth detector detects a displacement greater than the fourth displacement. The solidified oil detection device according to claim 1 .

9. The first detector is disposed relative to a portion of the rope wound around the sheave, The fourth detection body is disposed with respect to one side of the rope pulled out from the sheave. The solidified oil detection device according to claim 8.

10. an acquisition unit that acquires information about the operation of the elevator car from a control unit that controls the operation of the elevator car; an output unit that outputs a control signal to an alarm unit that issues an elevator status alert; Equipped with The output unit outputs a control signal indicating the occurrence of shaking in the elevator to at least one of the control unit and the alarm issuing unit when the first detector detects a displacement greater than the first displacement while the acquisition unit acquires information that the car is stopped. The solidified oil detection device according to claim 1 .

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