Elevator hoisting machine and elevator

Abstract

To obtain an elevator hoisting machine and elevator that can suppress the accumulation of air inside the housing covering the sheave. [Solution] The elevator hoisting machine of this embodiment comprises a sheave, an electric motor, a braking device, a cover, a blower, an air guide, and a filter. A rope connected to the elevator car is wound around the sheave. The electric motor rotates the sheave. The braking device brakes the sheave. The cover covers the sheave and the rope wound around the sheave. The blower is located outside the cover and blows air toward the electric motor. At least a portion of the air guide is located outside the cover and directs a portion of the air supplied from the blower to the inside of the cover. The filter filters the air exhausted from the cover.

Description

Technical Field

[0006]

[0001] Embodiments of the present invention relate to a hoisting machine for an elevator and an elevator.

Background Art

[0002] Conventionally, there is an elevator in which a rope suspending a car is wound around a sheave of a hoisting machine, and the car moves up and down in conjunction with the rotation of the sheave (for example, Patent Documents 1 and 2). Oil is impregnated into the rope to prevent rust and wear, and when the rope passes through the sheave, scattered oil, which is the oil scattered from the rope, stains peripheral equipment, which is equipment around the sheave. For example, the peripheral equipment includes a braking device including a brake disk integrally fixed to the sheave on the brake side of the hoisting machine in the machine room, a machine beam on which the hoisting machine is placed, a hoisting machine inspection stand, and the like. In particular, when the scattered oil adheres to the braking surface of the brake disk, the friction coefficient between the brake disk and the brake shoe may decrease, leading to a decrease in the braking performance of the braking device.

[0003] As types of scattered oil, visible granular scattered oil and invisible mist-like scattered oil (hereinafter referred to as oil mist) are generated. The granular scattered oil may reduce the functions of each peripheral device by directly adhering to the peripheral device.

[0004] The oil mist floats in the air due to the air flow generated by the rotation of the sheave or the movement of the rope, adheres to the braking device, and reduces the braking performance of the braking device.

[0005] The technique of Patent Document 1 generates an air flow between the outer periphery of the sheave and the sheave cover by the rotation of the sheave so as to flow to the side opposite to the brake disk, preventing the oil mist from adhering to the brake disk.

[0006] The technology described in Patent Document 2 prevents oil mist from adhering to the brake disc by using a rope stopper positioned upstream of the blower and equipped with air passages to draw in air around the sheave, and by collecting oil mist with a filter provided in the rope stopper hole. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2016-88653 [Patent Document 2] Patent No. 6195025 [Overview of the Initiative] [Problems that the invention aims to solve]

[0008] In this type of technology, if air accumulates inside the cover that surrounds the sheave, there is a risk that oil may adhere to the brake system.

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

[0010] The elevator hoisting machine of this embodiment comprises a sheave, an electric motor, a braking device, a cover, a blower, an air guide, and a filter. A rope connected to the elevator car is wound around the sheave. The electric motor rotates the sheave. The braking device brakes the sheave. The cover covers the sheave and the rope wound around the sheave. The blower is located outside the cover and blows air toward the electric motor. At least a portion of the air guide is located outside the cover and directs a portion of the air blown from the blower toward the inside of the cover. The filter filters the air exhausted from the cover. [Brief explanation of the drawing]

[0011] [Figure 1] Figure 1 shows an example of the configuration of an elevator according to the first embodiment. [Figure 2] Figure 2 is a front view showing a portion of the elevator according to the first embodiment, including the hoisting machine. [Figure 3] Figure 3 is a front view of the elevator according to the first embodiment, showing the portion including the hoisting machine, with the cover removed. [Figure 4] Figure 4 is a schematic diagram showing the portion of the elevator, including the hoisting machine, according to the first embodiment. [Figure 5] Figure 5 is a perspective view showing a rope detachment prevention member in an elevator according to the first embodiment. [Figure 6] Figure 6 is a flowchart showing an example of the process performed by the elevator control device of the first embodiment. [Figure 7] Figure 7 is a perspective view showing a rope detachment prevention member in an elevator according to the second embodiment. [Figure 8] Figure 8 is a perspective view showing a rope derailment prevention member in an elevator according to the third embodiment. [Figure 9] Figure 9 is a front view showing a portion of the elevator according to the fourth embodiment, including the hoisting machine. [Figure 10] Figure 10 is a front view of the elevator according to the fourth embodiment, showing the portion including the hoisting machine, with the cover removed. [Figure 11] Figure 11 is a flowchart showing an example of the process performed by the elevator control device of the fifth embodiment. [Figure 12] Figure 12 is a flowchart showing an example of the process performed by the elevator control device of the sixth embodiment. [Modes for carrying out the invention]

[0012] The embodiments will be described below with reference to the drawings.

[0013] <First Embodiment> FIG. 1 is a diagram showing a configuration example of an elevator 1 according to the first embodiment. The elevator 1 of the present 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 registration by operating various buttons of an operating device in a car 2 and call buttons of a call device provided at each landing. Of course, the hoistway R is provided across a plurality of floors of the building 100 and extends linearly along 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 vertically movably accommodated in the hoistway R. Specifically, the car 2 is vertically movably supported by guide rails (not shown) installed in the hoistway R. The car 2 accommodates passengers. Various buttons of an operating device for performing various operations of the elevator 1 and the like are provided in the car 2.

[0016] The counterweight 4 is vertically movably accommodated in the hoistway R. Specifically, the counterweight 4 is vertically movably supported by guide rails (not shown) installed in the hoistway R.

[0017] The main rope 6 has the upper end of the elevator car 2 fixed to one end and the upper end of the counterweight 4 fixed to the other end. The main rope 6 is impregnated with oil. In other words, the main rope 6 is filled with oil. The main rope 6 is stretched over the hoisting machine 12 (sheave 34) and deflection sheave 13 of the drive mechanism 7, so that the elevator car 2 and the counterweight 4 move up and down in opposite directions. That is, the elevator 1 is a so-called well-bench type elevator. In this way, the main rope 6 is moved by the hoisting machine 12 to raise and lower the elevator car 2 and the counterweight 4 in a well-bench type manner. The hoisting machine 12 is an example of an elevator hoisting machine.

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

[0019] The compensator 8 comprises a compensator rope 16, one end of which is attached to the lower end of the elevator car 2 and the other end of which is attached to the lower end of the counterweight 4, and a compensator sheave 17 that is hung on the compensator rope 16. The compensator 8 suppresses vibrations of the elevator car 2 and counterweight 4 during ascent and descent, and also offsets the weight of the main rope 6 when the elevator car 2 and counterweight 4 move up and down within the elevator shaft R.

[0020] Next, the hoisting machine 12 will be described in detail. Figure 2 is a front view showing the portion of the elevator according to the first embodiment that includes the hoisting machine. Figure 3 is a front view showing the portion of the elevator according to the first embodiment that includes the hoisting machine, with the cover removed. Figure 4 is a schematic diagram showing the portion of the elevator according to the first embodiment that includes the hoisting machine. Figure 5 is a perspective view showing the rope derailment prevention member in the elevator according to the first embodiment.

[0021] As shown in Figures 2 and 3, the hoisting machine 12 comprises a housing 30, a rotating shaft 33, a sheave 34, an electric motor 35, a braking device 36, a plurality of rope anti-slip members 39, a blower 41, an air guide 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 building 100 in the machine room 100a via beams or the like. The frame 31 has a pair of support parts 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 wrapped around the sheave 34, i.e., the main rope 6 wrapped around the sheave 34.

[0023] The rotating shaft 33 is rotatably supported on the frame 31. The rotating shaft 33 may be cantilevered to the frame 31 or double-supported to the frame 31. The rotating shaft 33 is housed in the cover 32 of the housing 30. That is, the rotating shaft 33 is located inside the cover 32. Hereafter, unless otherwise specified, axial, radial, and circumferential directions refer to the axial, radial, and circumferential directions of the rotating shaft 33.

[0024] The sheave 34 is fixed to the rotating shaft 33 and rotatably supported on the frame 31 via the rotating shaft 33. The sheave 34 and the rotating shaft 33 rotate together as a single unit. The rotating shaft 33 is fixed to the center of the sheave 34. Multiple main ropes 6 connected to the elevator car 2 are wound around the sheave 34. More specifically, multiple annular grooves are formed on the outer surface of the sheave 34 around the rotating shaft 33. The multiple grooves are aligned in the axial direction. Multiple main ropes 6 are placed in these multiple grooves. The sheave 34 is housed 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 is fixed to the frame 31. The electric motor 35 rotates the sheave 34 by rotating the rotating shaft 33. This causes the main rope 6 to move within the hoistway R, raising and lowering the elevator car 2.

[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 provided so as to be able to move toward and away 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 thereby stop the rotation of the rotating shaft 33 and the sheave 34, by clamping the brake disc 37 with the pair of brake pads.

[0027] Multiple rope retention members 39 are arranged radially outward from the sheave 34, spaced apart from each other in the circumferential direction. The number of rope retention members 39 is, for example, about 4 to 10, but is not limited to this. The rope retention members 39 are fixed to the frame 31. The rope retention members 39 are housed in the cover 32 of the housing 30. That is, the rope retention members 39 are located inside the cover 32 and are covered by the cover 32. The rope retention members 39 face the main rope 6 at predetermined intervals and prevent the main rope 6 from coming off the sheave 34. The detailed shape of the rope retention members 39 will be described later.

[0028] The blower 41 is located on the outside of the cover 32 of the housing 30. For example, the blower 41 is located on the opposite side of the cover 32 from the electric motor 35 and is fixed to the casing of the electric motor 35. The blower 41 draws in air from the intake port 41a and blows it out from the outlet port 41b. The blower 41 cools the electric motor 35 by blowing air towards the electric motor 35 from the outlet port 41b. For example, the air blown by the blower 41 cools the heat-generating parts of the electric motor 35, such as the coils.

[0029] The filter 44 filters the air exhausted from the cover 32. As shown in Figures 2 and 4, an exhaust port 32a is provided at the top of the cover 32, and the filter 44 is positioned in this exhaust port 32a. The filter 44 is capable of capturing oil in the air. The exhaust port 32a is, for example, approximately 100-200 mm in height and 100-400 mm in width, but is not limited to these dimensions.

[0030] The air guide section 43 is positioned at least partially outside the cover 32 and guides a portion of the air supplied from the blower 41 to the inside of the cover 32. Specifically, the air guide section 43 has a plurality of ducts 42 and a plurality of rope anti-detachment members 39. The number of ducts 42 and the number of rope anti-detachment members 39 are the same.

[0031] The duct 42 extends from the air outlet 41b of the blower 41 to the rope safety member 39. The duct 42 is made of, for example, a flexible and bendable pipe. The duct 42 has 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 supplied from the air outlet 41b of the blower 41 flows into the inlet 42a. A portion of the air supplied from the air outlet 41b of the blower 41 goes to the electric motor 35, and another portion flows into the inlet 42a of the duct 42. The outlet 42b is connected to the rope safety member 39 and allows the air that has flowed in from the inlet 42a to flow into the rope safety member 39.

[0032] As shown in Figures 3 and 5, the rope retention member 39 is cylindrical (for example, cylindrical) and extends in the axial direction. The rope retention member 39 has a diameter of approximately 8 to 40 mm and a length of approximately 400 to 500 mm, but is not limited to these dimensions. Air flowing out from the duct 42 flows into the rope retention member 39 and causes the incoming air to flow out to the inside of the cover 32.

[0033] As shown in Figure 5, the rope retaining member 39 has one end 39a, another end 39b, and an outer circumferential surface 39c. The one end 39a is one end of the rotating shaft 33 in the axial direction. The other end 39b is the other end of the rotating shaft 33 in the axial direction, i.e., the end opposite to the one end 39a. The outer circumferential surface 39c extends from the one end 39a to the other end 39b.

[0034] Furthermore, the rope retention member 39 is provided with a passage 39d and a plurality of holes 39e. The passage 39d extends axially 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 that opens at 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 arranged axially at intervals from each other, communicate with the passage 39d, and open to the outer circumferential surface 39c. The plurality of holes 39e are arranged from the axial center of the rope retention member 39 to both ends of the rope retention 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. Specifically, the hole 39e is oriented in a direction intersecting the radial direction of the rotating shaft 33, creating an airflow along the outer circumferential surface 39c of the sheave 34 toward the filter 44. Here, in Figures 4 and 5, the direction of the airflow (airflow) flowing out from the hole 39e of the rope retaining member 39 is indicated by arrows F1 and F3. The passage 39d is also referred to as the cavity.

[0035] Furthermore, as shown in Figures 2 and 4, the hoisting machine 12 is further equipped with a sensor 45 and a display unit 46.

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

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

[0038] In the hoisting machine 12 with the above configuration, the blower 41 starts simultaneously with the rotation of the sheave 34. A portion of the air supplied from the blower 41 cools the electric motor 35. Another portion of the air supplied from the blower 41 passes through the duct 42, flows into the passage 9d of the rope derailment member 39, and flows out to the inside of the cover 32 through the hole 39e. The air that flows out to the inside of the cover 32 travels along the outer circumference of the sheave 34 within the cover 32 toward the filter 44, passes through the filter 44, and is exhausted to the outside of the cover 32 (housing 30) through 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] As the rope 3 moves in the direction of winding around 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 diffuse into the cover 32. The oil mist 51 is generally said to be about 1 to 10 μm in size. The oil mist 51 is carried by the airflow 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, i.e., oil, in the filter 44 that has collected the oil mist 51, and outputs it to the control device 20.

[0041] Next, the control device 20 shown in Figure 1 will be described. The control device 20 is a device installed in the machine room 100a, etc., and is an arithmetic unit equipped with RAM, ROM, CPU, input / output ports and memory device (not shown). The control device 20 is electrically connected to the elevator car 2 via the tail code 18, etc. The control device 20 is electrically connected to the operating device of the elevator car 2, the calling devices at each floor landing, the drive mechanism 7 (electric motor 36c, brake device 36, sensor 45, display 46), etc., and controls the entire elevator 1.

[0042] Furthermore, the control device 20 has a functional configuration consisting of an acquisition unit 20a and a control unit 20b. These functional configurations 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 memory device. In this embodiment, some or all of these functional configurations may be realized by dedicated hardware (circuits).

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

[0044] The control unit 20b outputs information regarding the contamination of the filter 44 based on the detection results of the sensor 45 acquired by the acquisition unit 20a. For example, the control unit 20b determines the degree of contamination of the filter 44 based on the detection results of the sensor 45. The degree of contamination is set, for example, by the percentage of the area where oil is detected per predetermined area (unit area) of the filter 44. For example, if the percentage of the area where oil is detected per predetermined area (unit area) of the filter 44 is 50%, the degree of contamination is 50%. In other words, the higher the percentage of the area where oil is detected per predetermined area (unit area) of the filter 44, the higher the degree of contamination. If the control unit 20b determines that the degree of contamination of the filter 44 exceeds a threshold (for example, a degree of contamination of 50%), it issues a contamination alarm for the filter 44. Specifically, as a contamination alarm, the control unit 20b issues (transmits) contamination status information as information regarding the contamination of the filter 44 to the monitoring device 50 (Figure 4). The contamination status information includes the degree of contamination of the filter 44. The monitoring device 50 is installed at an external monitoring center. Furthermore, the control unit 20b displays the contamination status information on the display unit 46. The control unit 20b may both send an alert about the contamination status information to the monitoring device 50 and display the contamination status information on the display unit 46, or it may do only one of these. The frequency of alerts may be, for example, once a week or once a day, which makes it possible to reduce the frequency of alerts.

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

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

[0047] The control unit 20b determines whether or not oil contamination of the filter 44 has been detected (S3). 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 if it determines that the degree of contamination of the filter 44 exceeds a threshold (for example, 50% contamination) (S3:Yes). If the control unit 20b determines that oil contamination of the filter 44 has been detected (S3:Yes), it issues a contamination alarm for the filter 44 (S4). At this time, the control unit 20b displays the contamination status information on the display unit 46.

[0048] On the other hand, the control unit 20b determines, based on the detection result of the sensor 45 acquired by the acquisition unit 20a, that the degree of contamination of the filter 44 is below a threshold (for example, 50% contamination), and determines that no oil contamination of the filter 44 is detected (S3: No).

[0049] Regardless of whether oil contamination of the filter 44 is detected or not, the control unit 20b continues the normal operation of the elevator 1 (car 2) (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 hoisting machine 12 (elevator hoisting machine) comprises a sheave 34, an electric motor 35, a braking device 36, a cover 32, a blower 41, an air guide section 43, and a filter 44. The main rope 6 (rope) connected to the elevator car 2 is wound around the sheave 34. The electric motor 35 rotates the sheave 34. The braking 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 located outside the cover 32 and blows air toward the electric motor 35. At least a portion of the air guide section 43 is located outside the cover 32 and guides a portion of the air blown 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 43 directs a portion of the air supplied 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 suppress the accumulation of air inside the cover 32 of the housing 30 covering the sheave 34. Consequently, it is possible to suppress the adhesion of oil to the braking surface of the brake disc 37, and in turn, to suppress a decrease in the braking force of the brake device 36.

[0053] The air guide section 43 also includes a duct 42 and a rope anti-detachment member 39. The duct 42 is located outside the cover 32, and a portion of the air supplied from the blower 41 flows into it. The rope anti-detachment member 39 is cylindrical. The rope anti-detachment member 39 is covered by the cover 32 and faces the main rope 6, preventing the main rope 6 from coming off the sheave 34, and also receiving air that has flowed out of the duct 42 and allowing the incoming air to flow out to the inside of the cover 32.

[0054] With this configuration, the rope-preventing member 39 can be used as a component of the air guide section 43. In addition, since air is supplied from the blower 41 to the inside of the rope-preventing member 39, oil clogging inside the rope-preventing member 39 can be suppressed.

[0055] The hoisting machine 12 also includes a rotating shaft 33. The rotating shaft 33 is coupled to a sheave 34 and rotates integrally with the sheave 34. An electric motor 35 rotates the sheave 34 via the rotating shaft 33. The rope retaining member 39 has one end 39a, another end 39b, and an outer circumferential surface 39c. The one end 39a is the end of the rope retaining 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 from the one end 39a to the other end 39b. The rope retaining member 39 is provided with a passage 39d and a plurality of holes 39e. The passage 39d extends axially and opens to the one end 39a, allowing air from the duct 42 to flow in. Multiple holes 39e are arranged axially at intervals from one another, communicate with the passage 39d, and open to the outer surface 39c, allowing air to flow out to the inside of the cover 32.

[0056] With this configuration, air can be discharged from multiple holes 39e over a wide axial area.

[0057] Furthermore, the holes 39e are oriented in a direction intersecting the radial direction of the rotating shaft 33, creating an airflow along the outer circumferential surface 39c of the sheave 34 toward the filter 44.

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

[0059] The hoisting machine 12 is also equipped with a sensor 45. The sensor 45 detects dirt on the filter 44.

[0060] With this configuration, the sensor 45 can detect contamination of the filter 44.

[0061] Furthermore, elevator 1 is equipped with a control device 20 (output device). Based on the detection results of sensor 45, the control device 20 outputs information regarding the contamination of filter 44.

[0062] With this configuration, information regarding the contamination of the filter 44 can be output. Furthermore, in this embodiment, the time for replacing the filter 44 is automatically determined and an alarm is issued, thus eliminating the need for maintenance personnel to check the contamination status of the filter 44.

[0063] Furthermore, in this embodiment, the configuration for collecting oil mist 51 by the filter 44 using airflow from the blower 41 and the configuration for detecting the contamination status of the filter 44 using the sensor 45 are configured independently of each other. Therefore, they can function independently.

[0064] <Second Embodiment> Figure 7 is a perspective view showing a rope detachment prevention member in an elevator according to the second embodiment.

[0065] As shown in Figure 7, this embodiment differs from the first embodiment in that the hole 39e of the rope release member 39 in the hoisting machine 12 is different.

[0066] In this embodiment, there is one hole 39e. The single hole 39e connects to the passage 39d and opens to the outer circumferential surface 39c, and is an elongated hole with its axial direction as the longitudinal direction. The hole 39e allows air to flow out to the inside of the cover 32. The hole 39e is oriented in a direction intersecting the radial direction of the rotating shaft 33, creating an airflow along the outer circumferential surface 39c of the sheave 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 is about 4 to 10 mm wide and about 100 to 300 mm long, but is not limited to these dimensions.

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

[0068] With this configuration, compared to a configuration where the holes 39e are perfectly circular, air can be discharged over a wider area in the axial direction.

[0069] <Third Embodiment> Figure 8 is a perspective view showing a rope derailment prevention member in an elevator according to the third embodiment.

[0070] As shown in Figure 8, this embodiment differs from the first and second embodiments in that the hole 39e of the rope detachment prevention member 39 in the hoisting machine 12 is different.

[0071] The multiple holes 39e in this embodiment are spaced apart from each other in the axial direction, communicate with the passage 39d, and open to the outer circumferential surface 39c, forming elongated holes with the axial direction as the longitudinal direction. The multiple holes 39e are arranged from the axial center of the rope detachment member 39 to both ends of the rope detachment member 39. The holes 39e allow air to flow out to the inside of the cover 32. The holes 39e are oriented in a direction intersecting the radial direction of the rotating shaft 33, creating an airflow along the outer circumferential surface 39c of the sheave 34 toward the filter 44. The opening area of ​​the holes 39e in this embodiment is smaller than the opening area of ​​the holes 39e in the second embodiment. For example, the holes 39e are about 4 to 10 mm wide and about 10 to 20 mm long, but are not limited to these dimensions. Also, the number of holes 39e is about 5 to 20, but is not limited to these dimensions.

[0072] As described above, in this embodiment, the multiple holes 39e are arranged at intervals from each other in the axial direction, communicate with the passage 39d, and open to the outer peripheral surface 39c, forming 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 multiple holes 39e over a wide axial area.

[0074] <Fourth Embodiment> Figure 9 is a front view showing the portion of the elevator according to the fourth embodiment that includes the hoisting machine. Figure 10 is a front view showing the portion of the elevator according to the fourth embodiment that includes the hoisting machine, with the cover removed.

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

[0076] The duct 42 is provided with an inlet 42a and an outlet 42b, similar to the first embodiment. However, the outlet 42b in this embodiment is open inside the cover 32, allowing air to flow out into the inside of the cover 32. The outlet 42b also creates an airflow along the outer circumferential surface 39c of the sheave 34 toward the filter 44.

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

[0078] With this configuration, air can be directly discharged from the outlet 42b of the duct 42 into the inside of the cover 32, thus simplifying the configuration of the air guide section 43.

[0079] Furthermore, the outlet 42b creates an airflow along the outer surface 39c of the sheave 34 toward the filter 44.

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

[0081] <Fifth Embodiment> Figure 11 is a flowchart showing an example of the process performed by the elevator control device of the fifth embodiment.

[0082] In this embodiment, the processing performed by the control device 20 differs from that of the first embodiment. In this embodiment, multiple thresholds are set in stages for the degree of contamination 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 contamination status (detection level) of the oil in the filter 44. An example of the specific processing performed by the control device 20 will be described below with reference to Figure 11.

[0083] Similar to the first embodiment, the control unit 20b performs the processes in S1 and S2 and then determines whether the detection level of oil contamination of the filter 44 is low or not (S3a). Specifically, 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) if the degree of contamination of the filter 44 is below the low-level threshold (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), it proceeds to S5. On the other hand, 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 if the degree of contamination of the filter 44 exceeds the low-level threshold (S3a: Yes). If the control unit 20b determines that the contamination level of the filter 44 is low (S3a: Yes), it proceeds to S3b.

[0084] In S3b, the control unit 20b determines whether the detection level of oil contamination of the filter 44 is high or low. Specifically, 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 if the contamination level of the filter 44 is below the high-level threshold (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 device to replace the filter 44 during 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 a 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 device to replace the filter 44 immediately. Note that low contamination alerts and high contamination alerts may also be issued by displaying contamination level information on the display unit 46.

[0086] Regardless of the oil contamination detection level of the filter 44, the control unit 20b continues the normal operation of the elevator 1 (car 2) (S5).

[0087] With the above configuration, an alarm indicating the contamination level of filter 44 is issued, making it possible to identify whether or not there is an urgency to replace filter 7. Note that the above is an example where the contamination level (alarm) has two stages, low and high, but there may be three or more contamination levels (alarms).

[0088] <Sixth Embodiment> Figure 12 is a flowchart showing an example of the process performed by the elevator control device of the sixth embodiment.

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

[0090] Similar to the first embodiment, the control unit 20b performs the processes in S1 and S2 and then determines whether the detection level of oil contamination of the filter 44 is low or not (S3a). Specifically, 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) if the degree of contamination of the filter 44 is below the low-level threshold (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), it proceeds to S5. On the other hand, 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 if the degree of contamination of the filter 44 exceeds the low-level threshold (S3a: Yes). If the control unit 20b determines that the contamination level of the filter 44 is low (S3a: Yes), it proceeds to S3c.

[0091] In S3c, the control unit 20b determines whether the detection level of oil contamination in the filter 44 is at its highest. Specifically, 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 at its highest if the contamination level of the filter 44 is below the highest level threshold (S3c: No). If the control unit 20b determines that the contamination level of the filter 44 is not at its 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 device to replace the filter 44 during 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 at its highest (S3c: Yes), it issues a maximum contamination alert to the monitoring device 50 indicating that the contamination level of the filter 44 is at its highest (S4c). The information issued by the maximum contamination alert includes information to stop the elevator 1. Note that low contamination alerts and maximum contamination alerts may also be issued by displaying contamination level information on the display unit 46.

[0093] If the detection level of oil contamination in the filter 44 is not at the highest level (S3a: No, S4a), the control unit 20b performs the processing S5 to S7 as in the first embodiment. On the other hand, if the detection level of oil contamination in the filter 44 is at the highest level (S3c: Yes), the control unit 20b makes the elevator car 2 of the elevator 1 travel to the nearest floor (S8) and then makes the elevator car 2 of the elevator 1 come to an emergency stop (S9). After that, the control unit 20b stops the blower 41 (S7).

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

[0095] While several embodiments of the present invention have been described, these embodiments are presented as examples only and are not intended to limit the scope of the invention. These novel embodiments can be carried out in a variety of other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims of the invention and its equivalents. [Explanation of Symbols]

[0096] 1...Elevator, 2...Car, 12...Hoisting machine (elevator hoisting machine), 20...Control device (output device), 32...Cover, 33...Rotating shaft, 34...Sheave, 35...Electric motor, 36...Brake device, 39...Rope detour prevention member, 39a...One end, 39b...Other end, 39c...Outer surface, 39d...Passageway, 39e...Hole, 41...Blower, 42...Duct, 42a...Inlet, 42b...Outlet, 43...Air guide section, 44...Filter, 45...Sensor.

Claims

1. A sheave around which a rope connected to the elevator car is wound, An electric motor for rotating the sheave, A braking device for braking the aforementioned sheave, A cover that covers the sheave and the rope wrapped around the sheave, A blower is positioned on the outside of the cover and blows air toward the electric motor, At least a portion of the cover is located outside the cover and includes an air guide that directs a portion of the air supplied from the blower to the inside of the cover, A filter for filtering the air exhausted from the cover, A hoisting machine for elevators equipped with [a specific feature / feature].

2. The aforementioned air guide section is A duct is located outside the cover, through which a portion of the air supplied from the blower flows; A cylindrical rope-retaining member, covered by the aforementioned cover and facing the rope, prevents the rope from coming off the sheave, and allows the air flowing out from the duct to flow in and the incoming air to flow out to the inside of the cover, Having, The elevator hoisting machine according to claim 1.

3. It comprises a rotating shaft that is coupled to the sheave and rotates integrally with the sheave, The electric motor rotates the sheave via the rotating shaft, The aforementioned rope detachment prevention member is One end of the rotating shaft in the axial direction, The other end opposite to the aforementioned one end, The outer circumferential surface extending from one end to the other end, It has, The rope-prevention member includes: A passage extending in the axial direction and opening at one end through which the air from the duct flows in, A plurality of holes are arranged at intervals from each other in the axial direction, communicate with the passage, and open to the outer surface, allowing the air to flow out to the inside of the cover, It was established, The elevator hoisting machine according to claim 2.

4. It comprises a rotating shaft that is coupled to the sheave and rotates integrally with the sheave, The electric motor rotates the sheave via the rotating shaft, The aforementioned rope detachment prevention member is One end of the rotating shaft in the axial direction, The other end opposite to the aforementioned one end, The outer circumferential surface extending from one end to the other end, It has, The rope-prevention member includes: A passage extending in the axial direction and opening at one end through which the air from the duct flows in, It is a long, narrow hole that is connected to the passage and opens to the outer surface, with the axial direction being the longitudinal direction, and allows the air to flow out to the inside of the cover, It was established, The elevator hoisting machine according to claim 2.

5. It comprises a rotating shaft that is coupled to the sheave and rotates integrally with the sheave, The electric motor rotates the sheave via the rotating shaft, The aforementioned rope detachment prevention member is One end of the rotating shaft in the axial direction, The other end opposite to the aforementioned one end, The outer circumferential surface extending from one end to the other end, It has, The rope-prevention member includes: A passage extending in the axial direction and opening at one end through which the air from the duct flows in, The aforementioned axially spaced holes are arranged apart from each other, communicate with the passage, open to the outer surface, and are elongated holes with the axial direction as the longitudinal direction, allowing the air to flow out to the inside of the cover, It was established, The elevator hoisting machine according to claim 2.

6. The holes are oriented in a direction intersecting the radial direction of the rotating shaft, and generate the airflow along the outer circumferential surface of the sheave toward the filter. A hoisting machine for elevators according to any one of claims 3 to 5.

7. The air guide section is located outside the cover and has a duct that includes an inlet into which a portion of the air supplied from the blower flows, and an outlet that causes the air to flow out to the inside of the cover. The elevator hoisting machine according to claim 1.

8. The outlet generates the airflow along the outer surface of the sheave toward the filter. The elevator hoisting machine according to claim 7.

9. The filter is equipped with a sensor for detecting contamination. The elevator hoisting machine according to claim 1.

10. The elevator hoisting machine described in claim 9, An output device that outputs information regarding the contamination of the filter based on the detection results of the sensor, An elevator equipped with [a specific feature / feature].

Images