Elevator hoist and elevator

Abstract

To provide an elevator hoisting machine and an elevator capable of suppressing air from accumulating inside a housing that covers a sheave. [Solution] An elevator hoisting machine according to an embodiment includes a sheave, an electric motor, a brake device, a cover, a blower, an air guide section, and a filter. A rope connected to the car is wound around the sheave. The electric motor rotates the sheave. The brake device brakes the sheave. The cover covers the sheave and the rope wound around the sheave. The blower is located outside the cover and sends air toward the electric motor. At least a portion of the air guide section is located outside the cover and guides a portion of the air sent from the blower to the inside of the cover. The filter filters the air exhausted from the cover.

Description

[Technical Field]

[0001] An embodiment of the present invention relates to an elevator hoisting machine and an elevator. [Background technology]

[0002] Conventionally, elevators have been known in which a rope suspending a car is wound around a sheave of a traction machine, and the car ascends and descends in conjunction with the rotation of the sheave (see, for example, Patent Documents 1 and 2). The rope is impregnated with oil to prevent rust and wear, and as the rope passes through the sheave, oil splashes from the rope, contaminating peripheral equipment around the sheave. Examples of peripheral equipment include a brake device in a machine room, including a brake disc that is integrally fixed to the sheave on the brake side of the traction machine, a machine beam on which the traction machine is mounted, and a traction machine inspection platform. In particular, if splashed oil adheres to the braking surface of the brake disc, the coefficient of friction between the brake disc and the brake shoe decreases, which can lead to a decrease in the braking performance of the brake device.

[0003] There are two types of scattered oil: visible granular oil and invisible mist-like scattered oil (hereafter referred to as oil mist). Granular scattered oil can adhere directly to peripheral equipment and impair the functionality of those equipment.

[0004] Oil mist floats in the air due to air currents generated by the rotation of the sheave and the movement of the rope, and adheres to the brake equipment, reducing the braking performance of the brake equipment.

[0005] The technology in Patent Document 1 generates an air flow between the outer periphery of the sheave and the sheave cover by rotating the sheave, in the direction opposite to the brake disc, thereby preventing oil mist from adhering to the brake disc.

[0006] The technology in Patent Document 2 uses a rope stopper that is positioned upstream of the blower and has air passage holes to suck in air around the sheave, and a filter installed in the rope stopper hole collects the oil mist, preventing it from adhering to the brake disc. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-88653 [Patent Document 2] Patent No. 6195025 Summary of the Invention [Problem to be solved by the invention]

[0008] With this type of technology, if air remains inside the cover that covers the sheave, there is a risk that oil will adhere to the brake device.

[0009] Therefore, one object of the present invention is to provide an elevator hoisting machine and an elevator that can prevent air from accumulating inside the housing that covers the sheave. [Means for solving the problem]

[0010] An elevator hoisting machine according to an embodiment includes a sheave, an electric motor, a brake device, a cover, a blower, an air guide section, and a filter. A rope connected to a car is wound around the sheave. The electric motor rotates the sheave. The brake device brakes the sheave. The cover covers the sheave and the rope wound around the sheave. The blower is disposed outside the cover and sends air toward the electric motor. At least a portion of the air guide section is disposed outside the cover and guides a portion of the air sent from the blower to the inside of the cover. The filter filters the air exhausted from the cover. The air guidance section is arranged outside the cover and has a duct into which a portion of the air sent from the blower flows, and a cylindrical rope anti-slip member that is covered by the cover and faces the rope, prevents the rope from coming off the sheave, and into which the air flowing out of the duct flows and causes the inflowing air to flow out to the inside of the cover. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a diagram illustrating an example of the configuration of an elevator according to the first embodiment. [Figure 2] FIG. 2 is a front view showing a portion including a hoist in the elevator of the first embodiment. [Figure 3] FIG. 3 is a front view showing a portion including a hoist in the elevator of the first embodiment, with the cover removed. [Figure 4] FIG. 4 is a diagram schematically showing a portion including a hoist in the elevator of the first embodiment. [Figure 5] FIG. 5 is a perspective view showing a rope stopper member in the elevator of the first embodiment. [Figure 6] FIG. 6 is a flowchart illustrating an example of processing executed by the elevator control device of the first embodiment. [Figure 7] FIG. 7 is a perspective view showing a rope stopper member in an elevator according to the second embodiment. [Figure 8] FIG. 8 is a perspective view showing a rope stopper member in an elevator according to the third embodiment. [Figure 9] FIG. 9 is a front view showing a portion including a hoist in an elevator according to a fourth embodiment. [Figure 10] FIG. 10 is a front view showing a portion including a hoist in an elevator according to a fourth embodiment, with the cover removed. [Figure 11] FIG. 11 is a flowchart illustrating an example of processing executed by the elevator control device according to the fifth embodiment. [Figure 12] FIG. 12 is a flowchart illustrating an example of processing executed by the elevator control device of the sixth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, an embodiment will be described with reference to the drawings.

[0013] First Embodiment Fig. 1 is a diagram showing an example of the configuration of an elevator 1 according to a first embodiment. The elevator 1 according to this embodiment shown in Fig. 1 is installed in a hoistway R of a building 100, and transports passengers and the like to a desired floor of the building 100 based on call registrations made by operating various buttons on an operating device in a car 2 and call buttons on a call device provided at a landing on each floor. Of course, the hoistway R is provided across multiple floors of the building 100, and extends linearly in the vertical direction. The building 100 is also referred to as a building.

[0014] The elevator 1 includes a car 2, a counterweight 4, a main rope 6, a drive mechanism 7, a compensator 8, a relay box 11, a tail cord 18, and a control device 20. The main rope 6 is an example of a rope. The control device 20 is an example of an output device.

[0015] The car 2 is housed in the elevator shaft R so as to be movable in the vertical direction. Specifically, the car 2 is supported so as to be movable in the vertical direction by a guide rail (not shown) installed in the elevator shaft R. The car 2 accommodates passengers. Various buttons and the like of an operating device for performing various operations on the elevator 1 are provided inside the car 2.

[0016] The counterweight 4 is housed in the hoistway R so as to be movable in the vertical direction. Specifically, the counterweight 4 is supported by a guide rail (not shown) installed in the hoistway R so as to be movable in the vertical direction.

[0017] The main ropes 6 have one end to which the upper end of the car 2 is fixed, and the other end to which the upper end of the counterweight 4 is fixed. The main ropes 6 are soaked in oil. In other words, the main ropes 6 are impregnated with oil. The main ropes 6 are stretched over the hoist 12 (sheave 34) and the deflector sheave 13 of the drive mechanism 7, and are arranged so that the car 2 and the counterweight 4 rise and fall in opposite directions. In other words, the elevator 1 is a so-called bucket-type elevator. In this way, the main ropes 6 are moved by the hoist 12, thereby raising and lowering the car 2 and the counterweight 4 in a bucket-type manner. The hoist 12 is an example of an elevator hoist.

[0018] The drive mechanism 7 is a device provided, for example, in a machine room 100a above the hoistway R, and includes a hoisting machine 12 and a deflection sheave 13. The hoisting machine 12 has a sheave 34. The hoisting machine 12 is attached to the machine room 100a. A portion of the main rope 6 located between the counterweight 4 and the car 2 is hung on the upper side of the sheave 34 and the deflection sheave 13. The drive mechanism 7 drives and rotates the sheave 34 to move the main rope 6 within the hoistway R, thereby raising and lowering the car 2 and the counterweight 4.

[0019] The compensator 8 includes a compensator rope 16 having one end attached to the lower end of the car 2 and the other end attached to the lower end of the counterweight 4, and a compensator sheave 17 hung on the compensator rope 16. The compensator 8 suppresses vibrations of the car 2 and counterweight 4 during ascent and descent, and also offsets the weight of the main rope 6 when the car 2 and counterweight 4 ascend and descend within the hoistway R.

[0020] Next, the hoisting machine 12 will be described in detail. Fig. 2 is a front view showing a portion including the hoisting machine in the elevator of the first embodiment. Fig. 3 is a front view showing a portion including the hoisting machine in the elevator of the first embodiment, with the cover removed. Fig. 4 is a schematic view showing a portion including the hoisting machine in the elevator of the first embodiment. Fig. 5 is a perspective view showing a rope slippage prevention member in the elevator of the first embodiment.

[0021] As shown in Figures 2 and 3, the hoisting machine 12 includes a housing 30, a rotating shaft 33, a sheave 34, an electric motor 35, a braking device 36, a plurality of rope prevention members 39, a blower 41, an air guidance section 43, and a filter 44.

[0022] The housing 30 has a frame 31 and a cover 32. The frame 31 is fixed to the machine room 100a of the building 100 via beams or the like. The frame 31 has a pair of supports 31a. The cover 32 is detachably fixed to the frame 31. The cover 32 covers at least the sheave 34 and the portion of the main rope 6 that is wound around the sheave 34, i.e., the main rope 6 wound around the sheave 34.

[0023] The rotating shaft 33 is rotatably supported by the frame 31. The rotating shaft 33 may be cantilevered by the frame 31 or may be supported on both sides by the frame 31. The rotating shaft 33 is housed in the cover 32 of the housing 30. In other words, the rotating shaft 33 is located inside the cover 32. Hereinafter, unless otherwise specified, the axial direction, radial direction, and circumferential direction refer to the axial direction, radial direction, and circumferential direction of the rotating shaft 33.

[0024] The sheave 34 is fixed to the rotating shaft 33 and rotatably supported by the frame 31 via the rotating shaft 33. The sheave 34 and the rotating shaft 33 rotate integrally. The rotating shaft 33 is fixed to the center of the sheave 34. A plurality of main ropes 6 connected to the car 2 are wound around the sheave 34. More specifically, a plurality of annular grooves are formed around the rotating shaft 33 on the outer circumferential surface of the sheave 34. The grooves are aligned in the axial direction. A plurality of main ropes 6 are inserted into these grooves. The sheave 34 is accommodated in the cover 32 of the housing 30. That is, the sheave 34 is located inside the cover 32 and is covered by the cover 32.

[0025] The electric motor 35 is located outside the housing 30 and fixed to the frame 31. The electric motor 35 rotates the rotating shaft 33, thereby rotating the sheave 34. As a result, the main rope 6 moves within the elevator shaft R, and the car 2 moves up and down.

[0026] The brake device 36 is housed in the cover 32 of the housing 30. That is, the brake device 36 is located inside the cover 32 and is covered by the cover 32. The brake device 36 brakes the sheave 34. The brake device 36 also brakes the main rope 6 via the sheave 34. The brake device 36 is, for example, a disc brake device and has a brake disc 37 and a braking unit 38. The brake disc 37 is fixed to the rotating shaft 33 and rotates integrally with the rotating shaft 33 and the sheave 34. The braking unit 38 has a pair of brake pads. The pair of brake pads are arranged so as to be able to come into contact with and separate from a pair of braking surfaces of the brake disc 37. The braking unit 38 can stop the rotation of the brake disc 37 and, therefore, the rotation of the rotating shaft 33 and the sheave 34 by sandwiching the brake disc 37 between the pair of brake pads.

[0027] The multiple rope slippage prevention members 39 are arranged radially outward from the sheave 34 and spaced apart from one another in the circumferential direction. The number of rope slippage prevention members 39 is, for example, about 4 to 10, but is not limited to this. The rope slippage prevention members 39 are fixed to the frame 31. The rope slippage prevention members 39 are housed in the cover 32 of the housing 30. In other words, the rope slippage prevention members 39 are positioned inside and covered by the cover 32. The rope slippage prevention members 39 face the main rope 6 at a predetermined interval and prevent the main rope 6 from slipping off from the sheave 34. The detailed shape of the rope slippage prevention members 39 will be described later.

[0028] The blower 41 is disposed outside the cover 32 of the housing 30. For example, the blower 41 is disposed on the opposite side of the cover 32 with respect to the electric motor 35, and is fixed to the casing of the electric motor 35. The blower 41 draws air in through an intake port 41a and sends it out through an air outlet 41b. The blower 41 cools the electric motor 35 by sending air from the air outlet 41b toward the electric motor 35. For example, the air blown by the blower 41 cools heat-generating parts of the electric motor 35, such as a coil.

[0029] The filter 44 filters the air exhausted from the cover 32. As shown in Figures 2 and 4, an exhaust hole 32a is provided in the upper part of the cover 32, and the filter 44 is disposed in this exhaust hole 32a. The filter 44 can capture oil in the air. The exhaust hole 32a is, for example, about 100 to 200 mm long and about 100 to 400 mm wide, but is not limited to this.

[0030] At least a portion of air guide section 43 is disposed outside cover 32, and guides a portion of the air sent from blower 41 to the inside of cover 32. Specifically, air guide section 43 has a plurality of ducts 42 and a plurality of rope slippage prevention members 39. The number of ducts 42 and the number of rope slippage prevention members 39 are the same.

[0031] The duct 42 is provided between the air outlet 41b of the blower 41 and the rope slippage prevention member 39. The duct 42 is formed, for example, from a flexible and bendable pipe. The duct 42 is provided with an inlet 42a and an outlet 42b. The inlet 42a is located outside the cover 32 of the housing 30 and is connected to the air outlet 41b of the blower 41. A portion of the air sent from the air outlet 41b of the blower 41 flows into the inlet 42a. A portion of the air sent from the air outlet 41b of the blower 41 reaches the electric motor 35, and the other portion flows into the inlet 42a of the duct 42. The outlet 42b is connected to the rope slippage prevention member 39, and causes the air that flows in from the inlet 42a to flow into the rope slippage prevention member 39.

[0032] 3 and 5, rope slippage prevention member 39 has a tubular shape (cylindrical, for example) that extends in the axial direction. Rope slippage prevention member 39 has, for example, but not limited to, a diameter of approximately 8 to 40 mm and a length of approximately 400 to 500 mm. Rope slippage prevention member 39 receives air that has flowed out from duct 42 and directs the air to flow out to the inside of cover 32.

[0033] 5, the rope slippage prevention member 39 has one end 39a, the other end 39b, and an outer circumferential surface 39c. The one end 39a is one end in the axial direction of the rotating shaft 33. The other end 39b is the other end in the axial direction of the rotating shaft 33, i.e., the end opposite the one end 39a. The outer circumferential surface 39c spans the one end 39a and the other end 39b.

[0034] The rope slippage prevention member 39 is also provided with a passage 39d and a plurality of holes 39e. The passage 39d extends in the axial direction and opens at one end 39a. The other end 39b of the passage 39d is closed by the other end 39b. The open end of the passage 39d at the one end 39a is connected to the outlet 42b of the duct 42, and air flows in from the outlet 42b of the duct 42. The diameter of the passage 39d is, for example, about 4 to 30 mm, but is not limited thereto. The plurality of holes 39e are spaced apart from one another in the axial direction, communicate with the passage 39d, and open to the outer peripheral surface 39c. The plurality of holes 39e are aligned from the center of the rope slippage prevention member 39 in the axial direction to both ends of the rope slippage prevention member 39. The holes 39e have, for example, a circular cross section. The number of holes 39e is, for example, about 5 to 20, but is not limited thereto. The hole 39e allows air to flow out to the inside of the cover 32. More specifically, the hole 39e faces in a direction intersecting the radial direction of the rotary shaft 33, and generates a flow of air along the outer peripheral surface 39c of the sheave 34 toward the filter 44. Here, in Figures 4 and 5, the direction of the flow of air (air current) flowing out from the hole 39e of the rope slippage prevention member 39 is indicated by arrows F1 and F3. The passage 39d is also referred to as a cavity.

[0035] As shown in FIGS. 2 and 4, the hoist 12 further includes a sensor 45 and a display 46.

[0036] The sensor 45 detects contamination of the filter 44. The sensor 45 is located outside the cover 32 of the housing 30 and is fixed to the cover 32 via a bracket 47. The sensor 45 faces the filter 44. The sensor 45 is, for example, but not limited to, an infrared spectrophotometer or a laser sensor. The laser sensor irradiates the filter 44 with laser light, receives the laser light reflected by the filter 44, and can determine the amount of light received.

[0037] The display 46 is located outside the cover 32 of the housing 30 and is fixed to the cover 32 via a bracket 47. The display 46 displays various information.

[0038] In the traction machine 12 configured as described above, the blower 41 starts at the same time as the sheave 34 rotates. A portion of the air sent from the blower 41 cools the electric motor 35. Another portion of the air sent from the blower 41 passes through the duct 42, flows into the passage 9d of the rope slippage prevention member 39, and flows out through the hole 39e to the inside of the cover 32. The air that has flowed out to the inside of the cover 32 flows inside the cover 32 along the outer periphery of the sheave 34 toward the filter 44, passes through the filter 44, and is exhausted to the outside of the cover 32 (housing 30) from the exhaust hole 32a. Here, in Figure 4, the flow of air exhausted from the exhaust hole 32a to the outside of the cover 32 (housing 30) is indicated by arrow F2.

[0039] When the rope 3 moves in the winding direction of the sheave 34 in conjunction with the rotation of the sheave 34, oil contained in the main rope 6 may seep out. The seeped oil may become, for example, oil mist 51 and spread inside the cover 32. The oil mist 51 is generally about 1 to 10 μm. The oil mist 51 is carried by the air flow inside the cover 32 and is collected by the filter 44 as the air passes through the filter 44. The air is purified by the filter 44 and discharged outside the cover 32.

[0040] The sensor 45 detects (measures) the oil mist 51, that is, the oil, in the filter 44 that has collected the oil mist 51, and outputs the result to the control device 20.

[0041] Next, the control device 20 shown in Fig. 1 will be described. The control device 20 is a device provided in the machine room 100a or the like, and is a computing device equipped with RAM, ROM, a CPU, input / output ports, and a storage device (not shown). The control device 20 is electrically connected to the car 2 via a tail cord 18 or the like. The control device 20 is electrically connected to the operating device of the car 2, the call devices at the landings on each floor, the drive mechanism 7 (electric motor 36c, brake device 36, sensor 45, display 46), etc., and controls the entire elevator 1.

[0042] The control device 20 also has, as functional components, an acquisition unit 20a and a control unit 20b. These functional components are realized as a result of the CPU of the control device 20 executing a program stored in a storage unit such as a ROM or a storage device. Note that, in an embodiment, some or all of these functional components may be realized by dedicated hardware (circuitry).

[0043] The acquisition unit 20a receives (acquires) the detection result of the sensor 45 from the sensor 45.

[0044] The control unit 20b outputs information about the contamination of the filter 44 based on the detection result of the sensor 45 acquired by the acquisition unit 20a. For example, the control unit 20b determines the contamination level of the filter 44 based on the detection result of the sensor 45. The contamination level is set, for example, by the ratio of the area where oil is detected per predetermined area (unit area) of the filter 44. For example, if the ratio of the area where oil is detected per predetermined area (unit area) of the filter 44 is 50%, the contamination level is 50%. In other words, the higher the ratio of the area where oil is detected per predetermined area (unit area) of the filter 44, the higher the contamination level. When the control unit 20b determines that the contamination level of the filter 44 exceeds a threshold value (for example, a contamination level of 50%), it issues a contamination alert for the filter 44. Specifically, the control unit 20b issues (transmits) contamination status information as information about the contamination of the filter 44 to the monitoring device 50 ( FIG. 4 ) as the contamination alert. The contamination status information includes the contamination level of the filter 44. The monitoring device 50 is installed in an external monitoring center. Furthermore, the control unit 20b causes the display unit 46 to display the contamination status information. The control unit 20b may both issue a report of the contamination status information to the monitoring device 50 and display the contamination status information on the display unit 46, or may only do one of these. The frequency of issuing a report may be, for example, once a week or once a day, which makes it possible to reduce the frequency of issuing a report.

[0045] Next, an example of the processing executed by the control device 20 will be described with reference to Fig. 6. Fig. 6 is a flowchart showing an example of the processing executed by the elevator control device of the first embodiment.

[0046] When the control unit 20b starts operation (normal operation) of the elevator 1 (S1), it starts the blower 41 (S2). Note that, by the operation of the elevator 1 in S1, the sheave 34 is rotated by the electric motor 35, and the elevator 1 (car 2) runs normally.

[0047] The control unit 20b determines whether oil contamination of the filter 44 has been detected (S3). When the control unit 20b determines that the contamination level of the filter 44 exceeds a threshold value (e.g., a contamination level of 50%) based on the detection result of the sensor 45 acquired by the acquisition unit 20a, the control unit 20b determines that oil contamination of the filter 44 has been detected (S3: Yes). When the control unit 20b determines that oil contamination of the filter 44 has been detected (S3: Yes), it issues a contamination alert for the filter 44 (S4). At this time, the control unit 20b causes the display 46 to display contamination status information.

[0048] On the other hand, if the control unit 20b determines that the degree of contamination of the filter 44 is below a threshold value (e.g., a contamination level of 50%) based on the detection result of the sensor 45 acquired by the acquisition unit 20a, it determines that oil contamination of the filter 44 is not detected (S3: No).

[0049] The control unit 20b continues the normal running of the elevator 1 (car 2) regardless of whether oil contamination of the filter 44 is detected or not (S5).

[0050] When a predetermined stop operation is performed, the control unit 20b stops the normal operation of the elevator 1 (S6) and stops the blower 41 (S7).

[0051] As described above, in this embodiment, the hoist 12 (elevator hoist) includes the sheave 34, the electric motor 35, the brake device 36, the cover 32, the blower 41, the air guide section 43, and the filter 44. The main rope 6 (rope) connected to the car 2 is wound around the sheave 34. The electric motor 35 rotates the sheave 34. The brake device 36 brakes the sheave 34. The cover 32 covers the sheave 34 and the main rope 6 wound around the sheave 34. The blower 41 is disposed outside the cover 32 and sends air toward the electric motor 35. At least a portion of the air guide section 43 is disposed outside the cover 32 and guides a portion of the air sent from the blower 41 to the inside of the cover 32. The filter 44 filters the air exhausted from the cover 32.

[0052] With this configuration, the air guide section 43 guides a portion of the air sent from the blower 41 to the inside of the cover 32, so that the air inside the cover 32 of the housing 30 covering the sheave 34 is easily exhausted to the outside of the cover 32 via the filter 44. Therefore, with the above configuration, it is possible to prevent air from accumulating inside the cover 32 of the housing 30 covering the sheave 34. This makes it possible to prevent oil from adhering to the braking surface of the brake disc 37, and ultimately to prevent a decrease in the braking force of the brake device 36.

[0053] The air guide section 43 also has a duct 42 and a rope slippage prevention member 39. The duct 42 is arranged outside the cover 32, and some of the air sent from the blower 41 flows into the duct 42. The rope slippage prevention member 39 is cylindrical. The rope slippage prevention member 39 is covered by the cover 32 and faces the main rope 6, preventing the main rope 6 from slipping off from the sheave 34. The air flowing out from the duct 42 flows into the rope slippage prevention member 39, and the rope slippage prevention member 39 causes the air to flow out to the inside of the cover 32.

[0054] According to this configuration, the rope slippage prevention member 39 can be used as a component of the air guide section 43. In addition, since air is sent from the blower 41 into the inside of the rope slippage prevention member 39, oil clogging inside the rope slippage prevention member 39 can be suppressed.

[0055] The hoist 12 also includes a rotating shaft 33. The rotating shaft 33 is coupled to the sheave 34 and rotates integrally therewith. The electric motor 35 rotates the sheave 34 via the rotating shaft 33. The rope slippage prevention member 39 has one end 39a, the other end 39b, and an outer circumferential surface 39c. The one end 39a is the end of the rope slippage prevention member 39 in the axial direction of the rotating shaft 33. The other end 39b is the end opposite to the one end 39a. The outer circumferential surface 39c extends between the one end 39a and the other end 39b. The rope slippage prevention member 39 is provided with a passage 39d and a plurality of holes 39e. The passage 39d extends in the axial direction and opens to the one end 39a, through which air flows in from the duct 42. The holes 39e are arranged at intervals in the axial direction, communicate with the passage 39d, and open to the outer peripheral surface 39c, allowing air to flow out to the inside of the cover 32.

[0056] With this configuration, air can be discharged from the plurality of holes 39e over a wide range in the axial direction.

[0057] The holes 39e are oriented in a direction intersecting the radial direction of the rotary shaft 33, and generate an air flow along the outer peripheral surface 39c of the sieve 34 toward the filter 44.

[0058] With this configuration, the air flowing out from the hole 39e can be directed toward the filter 44 smoothly.

[0059] The hoist 12 also includes a sensor 45. The sensor 45 detects whether the filter 44 is dirty.

[0060] With this configuration, the sensor 45 can detect whether the filter 44 is dirty.

[0061] The elevator 1 also includes a control device 20 (output device). The control device 20 outputs information about the dirt on the filter 44 based on the detection result of the sensor 45.

[0062] This configuration makes it possible to output information regarding the contamination of the filter 44. Furthermore, in this embodiment, the time to replace the filter 44 is automatically determined and an alarm is issued, which eliminates the need for a maintenance technician to check the contamination status of the filter 44.

[0063] In this embodiment, the configuration for collecting oil mist 51 by filter 44 using air blown by blower 41 and the configuration for detecting the contamination state of filter 44 using sensor 45 are configured independently of each other, so that they can function independently.

[0064] <Second embodiment> FIG. 7 is a perspective view showing a rope stopper member in an elevator according to the second embodiment.

[0065] As shown in FIG. 7, this embodiment differs from the first embodiment in the hole 39e of the rope slippage prevention member 39 in the hoisting machine 12.

[0066] In this embodiment, there is only one hole 39e. The hole 39e is connected to the passage 39d, opens to the outer peripheral surface 39c, and is an elongated hole with the axial direction as its longitudinal direction. The hole 39e allows air to flow to the inside of the cover 32. The hole 39e faces in a direction intersecting the radial direction of the rotary shaft 33, and generates a flow of air along the outer peripheral surface 39c of the sieve 34 toward the filter 44. The opening area of ​​the hole 39e in this embodiment is larger than the opening area of ​​the hole 39e in the first embodiment. For example, the hole 39e has a width of approximately 4 to 10 mm and a length of approximately 100 to 300 mm, but is not limited to this.

[0067] As described above, in this embodiment, one hole 39e communicates with passage 39d and opens to outer peripheral surface 39c, has an elongated hole 39e shape with the axial direction as the longitudinal direction, and allows air to flow out to the inside of cover 32.

[0068] With this configuration, air can be discharged over a wider range in the axial direction than with a configuration in which the holes 39e are perfectly circular.

[0069] <Third embodiment> FIG. 8 is a perspective view showing a rope stopper member in an elevator according to the third embodiment.

[0070] As shown in FIG. 8, this embodiment differs from the first and second embodiments in the hole 39e of the rope stopper member 39 in the hoisting machine 12.

[0071] The multiple holes 39e in this embodiment are arranged at intervals in the axial direction, communicate with the passage 39d, open to the outer peripheral surface 39c, and are elongated holes with the axial direction as the longitudinal direction. The multiple holes 39e are arranged from the axial center of the rope slippage prevention member 39 to both ends of the rope slippage prevention member 39. The holes 39e allow air to flow inside the cover 32. The holes 39e are oriented in a direction intersecting the radial direction of the rotating shaft 33, generating an air flow along the outer peripheral surface 39c of the sheave 34 toward the filter 44. The opening area of ​​the holes 39e in this embodiment is smaller than that of the holes 39e in the second embodiment. For example, the holes 39e have a width of approximately 4 to 10 mm and a length of approximately 10 to 20 mm, but are not limited thereto. The number of holes 39e is approximately 5 to 20, but is not limited thereto.

[0072] As described above, in this embodiment, the multiple holes 39e are arranged at intervals in the axial direction, communicate with the passage 39d, open to the outer peripheral surface 39c, and are elongated holes 39e with the axial direction as the longitudinal direction, allowing air to flow out to the inside of the cover 32.

[0073] With this configuration, air can be discharged from the plurality of holes 39e over a wide range in the axial direction.

[0074] <Fourth embodiment> Fig. 9 is a front view showing a part including a hoist in an elevator of a fourth embodiment. Fig. 10 is a front view showing a part including a hoist in an elevator of a fourth embodiment, with a cover removed.

[0075] 9 and 10, this embodiment differs from the first embodiment in that the hoisting machine 12 is not provided with a rope slippage prevention member 39. The air guidance section 43 of this embodiment has a plurality of ducts 42, but does not have a rope slippage prevention member 39.

[0076] As in the first embodiment, the duct 42 has an inlet 42a and an outlet 42b. However, in this embodiment, the outlet 42b is open inside the cover 32, allowing air to flow inside the cover 32. In addition, the outlet 42b generates a flow of air along the outer peripheral surface 39c of the sieve 34 toward the filter 44.

[0077] As described above, in this embodiment, the air guide section 43 has the duct 42. The duct 42 is provided with an inlet 42a located outside the cover 32 and through which a portion of the air sent from the blower 41 flows in, and an outlet 42b through which the air flows out to the inside of the cover 32.

[0078] According to this configuration, air can be discharged directly from the outlet 42b of the duct 42 to the inside of the cover 32, so that the configuration of the airflow guidance section 43 can be simplified.

[0079] The outlet 42b also generates a flow of air along the outer peripheral surface 39c of the sieve 34 toward the filter 44.

[0080] With this configuration, the air flowing out from the outlet 42b can be directed toward the filter 44 smoothly.

[0081] <Fifth embodiment> FIG. 11 is a flowchart illustrating an example of processing executed by the elevator control device according to the fifth embodiment.

[0082] This embodiment differs from the first embodiment in the processing executed by the control device 20. In this embodiment, a plurality of thresholds are set in stages for the contamination level of the filter 44. For example, the low level threshold (low level) is a contamination level of 50%, and the high level threshold (high level) is a contamination level of 90%. The control device 20 uses these thresholds to determine the oil contamination state (detection level) of the filter 44. An example of a specific processing executed by the control device 20 will be described below with reference to FIG. 11.

[0083] As in the first embodiment, after executing the processes of S1 and S2, the control unit 20b determines whether the detection level of oil contamination of the filter 44 is low (S3a). Specifically, if the contamination level of the filter 44 is equal to or lower than the low-level threshold based on the detection result of the sensor 45 acquired by the acquisition unit 20a, the control unit 20b determines that the contamination level of the filter 44 is not low (oil contamination of the filter 44 is not detected) (S3a: No). If the control unit 20b determines that the contamination level of the filter 44 is not low (oil contamination of the filter 44 is not detected) (S3a: No), the control unit 20b proceeds to S5. On the other hand, if the contamination level of the filter 44 exceeds the low-level threshold based on the detection result of the sensor 45 acquired by the acquisition unit 20a, the control unit 20b determines that the contamination level of the filter 44 is low (S3a: Yes). If the control unit 20b determines that the contamination level of the filter 44 is low (S3a: Yes), the control unit 20b proceeds to S3b.

[0084] In S3b, the control unit 20b determines whether the detection level of oil contamination of the filter 44 is high. Specifically, if the contamination level of the filter 44 is equal to or lower than the high-level threshold based on the detection result of the sensor 45 acquired by the acquisition unit 20a, the control unit 20b determines that the contamination level of the filter 44 is not high (S3b: No). If the control unit 20b determines that the contamination level of the filter 44 is not high (S3b: No), it issues a low contamination alert to the monitoring device 50, indicating that the contamination level of the filter 44 is low (S4a). The information issued by the low contamination alert includes information instructing the replacement of the filter 44 at the next inspection of the elevator 1.

[0085] On the other hand, in S3b, the control unit 20b determines that the contamination level of the filter 44 is high if the contamination level of the filter 44 exceeds the high-level threshold based on the detection result of the sensor 45 acquired by the acquisition unit 20a (S3b: Yes). If the control unit 20b determines that the contamination level of the filter 44 is high (S3b: Yes), it issues a high contamination alert to the monitoring device 50, indicating that the contamination level of the filter 44 is high (S4b). The information issued by the high contamination alert includes information instructing the filter 44 to be replaced immediately. The low contamination alert and high contamination alert may be issued by causing the display 46 to display information about the contamination level.

[0086] The control unit 20b continues the normal running of the elevator 1 (car 2) regardless of the detection level of oil contamination in the filter 44 (S5).

[0087] According to the above configuration, an alarm is issued to indicate the contamination level of the filter 44, making it possible to identify whether or not there is an urgency in replacing the filter 7. Note that, although the above example shows two levels of contamination (alerts), low and high, the contamination level (alerts) may be three or more levels.

[0088] Sixth Embodiment FIG. 12 is a flowchart illustrating an example of processing executed by the elevator control device of the sixth embodiment.

[0089] This embodiment differs from the first and second embodiments in the processing executed by the control device 20. In this embodiment, a plurality of thresholds are set in stages for the contamination level of the filter 44. For example, the low level threshold is a contamination level of 50%, and the highest level threshold is a contamination level of 100%. The control device 20 uses these thresholds to determine the oil contamination state (detection level) of the filter 44. An example of a specific processing executed by the control device 20 will be described below with reference to FIG. 12.

[0090] As in the first embodiment, after executing the processes of S1 and S2, the control unit 20b determines whether the detection level of oil contamination of the filter 44 is low (S3a). Specifically, if the contamination level of the filter 44 is equal to or lower than the low-level threshold based on the detection result of the sensor 45 acquired by the acquisition unit 20a, the control unit 20b determines that the contamination level of the filter 44 is not low (oil contamination of the filter 44 is not detected) (S3a: No). If the control unit 20b determines that the contamination level of the filter 44 is not low (oil contamination of the filter 44 is not detected) (S3a: No), the control unit 20b proceeds to S5. On the other hand, if the contamination level of the filter 44 exceeds the low-level threshold based on the detection result of the sensor 45 acquired by the acquisition unit 20a, the control unit 20b determines that the contamination level of the filter 44 is low (S3a: Yes). If the control unit 20b determines that the contamination level of the filter 44 is low (S3a: Yes), the control unit 20b proceeds to S3c.

[0091] In S3c, the control unit 20b determines whether the detection level of oil contamination in the filter 44 is the highest. Specifically, if the contamination level of the filter 44 is equal to or lower than the highest level threshold based on the detection result of the sensor 45 acquired by the acquisition unit 20a, the control unit 20b determines that the contamination level of the filter 44 is not the highest (S3c: No). If the control unit 20b determines that the contamination level of the filter 44 is not the highest (S3c: No), it issues a low contamination alert to the monitoring device 50, indicating that the contamination level of the filter 44 is low (S4a). The information issued by the low contamination alert includes information instructing the replacement of the filter 44 at the next inspection of the elevator 1.

[0092] On the other hand, in S3c, the control unit 20b determines that the contamination level of the filter 44 is high if the contamination level of the filter 44 exceeds the maximum level threshold based on the detection result of the sensor 45 acquired by the acquisition unit 20a (S3c: Yes). If the control unit 20b determines that the contamination level of the filter 44 is maximum (S3c: Yes), it issues a maximum contamination alert to the monitoring device 50 indicating that the contamination level of the filter 44 is maximum (S4c). The information issued by the maximum contamination alert includes information to stop the elevator 1. The low contamination alert and maximum contamination alert may also be issued by displaying information on the contamination level on the display 46.

[0093] If the detection level of oil contamination in the filter 44 is other than the highest level (S3a: No, S4a), the control unit 20b performs the processes of S5 to S7 as in the first embodiment. On the other hand, if the detection level of oil contamination in the filter 44 is the highest level (S3c: Yes), the control unit 20b runs the car 2 of the elevator 1 to the nearest floor (S8) and brings the car 2 of the elevator 1 to an emergency stop (S9). Thereafter, the control unit 20b stops the blower 41 (S7).

[0094] With this configuration, if the contamination level of the filter 44 is severe, the car 2 can be stopped.

[0095] Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the scope of the invention and its equivalents as defined in the claims. [Explanation of symbols]

[0096] 1...elevator, 2...car, 12...hoist (elevator hoist), 20...control device (output device), 32...cover, 33...rotating shaft, 34...sheave, 35...electric motor, 36...brake device, 39...rope prevention member, 39a...one end, 39b...other end, 39c...outer surface, 39d...passage, 39e...hole, 41...blower, 42...duct, 42a...inlet, 42b...outlet, 43...air guidance section, 44...filter, 45...sensor.

Claims

1. A sheave around which a rope connected to the car is wound, an electric motor that rotates the sheave; a brake device that brakes the sheave; a cover that covers the sheave and the rope wound around the sheave; a blower disposed outside the cover and blowing air toward the electric motor; an air guide unit, at least a portion of which is disposed outside the cover, and which guides a portion of the air sent from the blower to the inside of the cover; a filter that filters the air exhausted from the cover; Equipped with The airflow guidance section is a duct disposed outside the cover and into which a portion of the air sent from the blower flows; A cylindrical rope slip-off prevention member that is covered by the cover, faces the rope, prevents the rope from slipping off from the sheave, and receives the air flowing out of the duct and allows the air to flow out to the inside of the cover; having Elevator hoisting machine.

2. a rotating shaft coupled to the sheave and rotating integrally with the sheave; The electric motor rotates the sheave via the rotating shaft, The rope slip-off prevention member is one end of the rotary shaft in the axial direction; Another end portion opposite to the one end portion; an outer circumferential surface extending from the one end portion to the other end portion; and The rope slippage prevention member has a passage extending in the axial direction and opening at the one end into which the air from the duct flows; a plurality of holes arranged at intervals in the axial direction, communicating with the passage and opening to the outer circumferential surface, for allowing the air to flow out to the inside of the cover; was established, The elevator hoisting machine according to claim 1.

3. a rotating shaft coupled to the sheave and rotating integrally with the sheave; The electric motor rotates the sheave via the rotating shaft, The rope slip-off prevention member is one end of the rotary shaft in the axial direction; Another end portion opposite to the one end portion; an outer circumferential surface extending from the one end portion to the other end portion; and The rope slippage prevention member has a passage extending in the axial direction and opening at the one end into which the air from the duct flows; a hole communicating with the passage, opening to the outer peripheral surface, having a long hole shape with the axial direction as a longitudinal direction, and allowing the air to flow out to the inside of the cover; was established, The elevator hoisting machine according to claim 1.

4. a rotating shaft coupled to the sheave and rotating integrally with the sheave; The electric motor rotates the sheave via the rotating shaft, The rope slip-off prevention member is one end of the rotary shaft in the axial direction; Another end portion opposite to the one end portion; an outer circumferential surface extending from the one end portion to the other end portion; and The rope slippage prevention member has a passage extending in the axial direction and opening at the one end into which the air from the duct flows; a plurality of holes arranged at intervals in the axial direction, communicating with the passage, opening on the outer peripheral surface, and having a long hole shape with the axial direction as a longitudinal direction, for allowing the air to flow out to the inside of the cover; was established, The elevator hoisting machine according to claim 1.

5. The holes are oriented in a direction intersecting the radial direction of the rotary shaft, and cause the air to flow along the outer circumferential surface of the sieve toward the filter. The elevator hoisting machine according to any one of claims 2 to 4.

6. A sheave around which a rope connected to a passenger car is wound, an electric motor that rotates the sheave; a brake device that brakes the sheave; a cover that covers the sheave and the rope wound around the sheave; a blower disposed outside the cover and blowing air toward the electric motor; an air guide unit, at least a portion of which is disposed outside the cover, and which guides a portion of the air sent from the blower to the inside of the cover; a filter that filters the air exhausted from the cover; Equipped with the air guide section has a duct provided with an inlet located outside the cover and into which a portion of the air sent from the blower flows in, and an outlet through which the air flows out to the inside of the cover, The outlet causes the air to flow along the outer circumferential surface of the sieve toward the filter. Elevator hoisting machine.

7. a sensor for detecting contamination of the filter; The elevator hoisting machine according to claim 1 or 6.

8. The elevator hoisting machine according to claim 7; an output device that outputs information about the contamination of the filter based on the detection result of the sensor; An elevator equipped with:

Images