JP2021024686A - Elevator and elevator system - Google Patents

Abstract

To provide an elevator and an elevator system capable of estimating a state of each component before the riding comfort is deteriorated.SOLUTION: An elevator 1 includes a car 2, a load detection sensor 13, an inclination sensor 15, and a state monitoring part 7. The load detection sensor 13 detects a load applied on the car 1. The inclination sensor 15 detects the inclination of the car 2. The state monitoring part 7 receives load information detected by the load detection sensor 13 and inclination information detected by the inclination sensor 15 and estimates the degree of damage for each component of the car 2 based on the load information and the inclination information.SELECTED DRAWING: Figure 1

Description

The present invention relates to an elevator and an elevator system for monitoring the state of a car, a main rope, and the like.

Conventionally, an elevator is provided with a riding basket, a balancing weight, a rope connecting the riding basket and the balancing weight, and a hoisting machine on which the rope is wound. Elevators are regularly maintained and inspected because the ride quality changes as parts deteriorate over time. Further, as a technique for monitoring an elevator in order to shorten the time required for maintenance and inspection, for example, there is a technique described in Patent Document 1.

Patent Document 1 describes a technique relating to an elevator vibration monitoring device that is installed in an elevator car and monitors the vibration of the car. The technique described in Patent Document 1 includes a vibration detector that detects the vibration acceleration of the car and an analyzer that analyzes the vibration acceleration from the vibration detector to determine the riding comfort of the elevator. Then, the technique described in Patent Document 1 determines that the riding comfort is deteriorated when the increase amount of the vibration acceleration is equal to or more than a predetermined value by the analyzer.

Japanese Unexamined Patent Publication No. 2003-112862

However, at the time of maintenance and inspection, it is necessary to inspect a large number of members such as a plurality of anti-vibration members and main ropes, but the technique described in Patent Document 1 cannot determine which part is deteriorated. I had the problem. Further, in the technique described in Patent Document 1, it is not possible to determine an abnormality of a part until the vibration becomes a predetermined value or more.

An object of the present invention is to provide an elevator and an elevator system capable of estimating the state of each part before the riding comfort deteriorates in consideration of the above problems.

In order to solve the above problems and achieve the purpose, the elevator is equipped with a car room on which people and luggage are placed, a car with a car frame that supports the car room, a load detection sensor that detects the load applied to the car, and a ride. It is equipped with a tilt sensor that detects the tilt of the car. In addition, the elevator receives the load information detected by the load detection sensor and the inclination information detected by the inclination sensor, and based on the load information and the inclination information, the elevator has a state monitoring unit that estimates the degree of damage for each part of the car. I have.

Further, the elevator system includes an elevator having a car that moves up and down the hoistway, and an external device that is connected to the elevator so that information can be transmitted and received.
The elevator is provided with a load detection sensor that detects the load applied to the car and an inclination sensor that detects the inclination of the car. Then, the external device or the elevator receives the load information detected by the load detection sensor and the inclination information detected by the inclination sensor, and estimates the degree of damage for each part of the car based on the load information and the inclination information. It has a monitoring unit.

According to the elevator and the elevator system having the above configuration, the state of each part can be estimated before the ride quality deteriorates.

It is a schematic block diagram which shows the elevator system which concerns on the 1st Embodiment example. It is a perspective view which shows the car of the elevator which concerns on the example of 1st Embodiment. It is a front view which shows the car of the elevator which concerns on the example of 1st Embodiment. It is a flowchart which shows the state monitoring operation example of the elevator system which concerns on the 1st Embodiment example. It is a figure which shows the stress estimation database stored in the state monitoring part concerning the 1st Embodiment example. It is a schematic block diagram which shows the elevator system which concerns on the 2nd Embodiment example. It is a figure which shows the upper part of the car in the elevator system which concerns on 3rd Embodiment example. It is a front view which shows the car in the elevator system which concerns on 4th Embodiment example. It is a flowchart which shows the state monitoring operation example of the elevator system which concerns on 4th Embodiment example. It is explanatory drawing which shows the evaluation method of the acceleration data in the state monitoring operation example of the elevator system which concerns on 4th Embodiment example. It is a SN curve diagram of an arbitrary part.

Hereinafter, examples of embodiments of the elevator and the elevator system will be described with reference to FIGS. 1 to 11. The common members in each figure are designated by the same reference numerals.

1. 1. Example 1-1 of the first embodiment. Configuration of Elevator System First, the configuration of the elevator system according to the first embodiment (hereinafter referred to as "this example") will be described with reference to FIG.
FIG. 1 is a schematic configuration diagram showing an elevator system.

As shown in FIG. 1, the elevator system 100 includes an elevator 1 and a maintenance terminal 110 showing an example of an external device. The elevator 1 includes a car 2 that goes up and down in the hoistway, a main rope 3 that is connected to the car 2, a balance weight 4 that is connected to the car 2 via the main rope 3, and a main rope 3. It has a hoisting machine 5 to be wound. When the hoisting machine 5 is driven, the car 2 moves up and down in the hoistway.

Further, the elevator 1 includes a control unit 6 that controls the entire elevator 1 and a condition monitoring unit 7. The control unit 6 and the condition monitoring unit 7 are mounted on a control device installed in a building structure. The control unit 6 receives the information detected by the load detection sensor 13 and the inclination sensor 15 provided in the car 2 described later. Then, the control unit 6 controls the opening and closing of the door provided in the car 2 and controls the drive of the hoisting machine 5 based on the received information.

The condition monitoring unit 7 is connected to the control unit 6 so that information can be transmitted and received by wire or wirelessly. The condition monitoring unit 7 receives the information detected by the load detection sensor 13 and the tilt sensor 15 from the control unit 6. Further, the condition monitoring unit 7 has a stress estimation database for estimating the stress applied to the parts of the car 2. The stress estimation database is created in advance for each part. Then, the condition monitoring unit 7 estimates the stress for each component based on the received information and stores it in the storage unit. A detailed operation example of the condition monitoring unit 7 will be described later.

When performing maintenance and inspection, a maintenance terminal 110 is connected to the condition monitoring unit 7 or the control unit 6. The condition monitoring unit 7 or the control unit 6 and the maintenance terminal 110 are connected so as to be able to transmit and receive information by wire or wirelessly. The maintenance terminal 110 receives the information stored in the storage unit of the condition monitoring unit 7. A detailed operation example of the maintenance terminal 110 will be described later.

1-2. Configuration Example of Car Car Next, the configuration of car 2 of elevator 1 will be described with reference to FIGS. 2 and 3.
FIG. 2 is a perspective view showing the car of this example. FIG. 3 is a front view showing the car.

As shown in FIGS. 2 and 3, the car 2 includes a car chamber 10, a car frame 11 that supports the car chamber 10, a vibration isolator member 12, a load detection sensor 13, and an inclination sensor 15. ing. The car chamber 10 is formed in a hollow substantially rectangular parallelepiped shape. The door 10a is provided in the car chamber 10 so as to be openable and closable. People and luggage are placed in this basket room 10. An inclination sensor 15 is provided on the ceiling of the car chamber 10. The tilt sensor 15 detects the tilt of the car chamber 10. Further, the inclination sensor 15 detects the inclination of two axes (X-axis and Y-axis) orthogonal to the elevating direction of the car 2 or the direction in which the side frame 23 of the car frame 11 described later is erected.

The position where the inclination sensor 15 is provided is not limited to the ceiling of the car chamber 10, and for example, the inclination sensor 15 may be provided on the side surface portion or the floor surface of the car chamber 10. Since the side surface portion and the floor surface of the car chamber 10 are formed of flat plate-shaped members, there is a risk of bending when a person or luggage gets into the car chamber 10. Then, the inclination sensor 15 may erroneously detect the inclination of the side surface portion or the floor surface as the inclination of the car chamber 10. Therefore, when the inclination sensor 15 is provided on the side surface portion or the floor surface, it is preferable to install the inclination sensor 15 on the side surface portion, the corner portion of the floor surface, or a place having high rigidity. Further, the inclination sensor 15 is preferably provided on the ceiling where the deflection is less than that of other parts.

A car frame 11 is provided so as to surround the outer periphery of the car chamber 10. The car frame 11 has an upper frame 21, a floor frame 22, and two side frames 23, 23. The upper frame 21 is arranged above the car chamber 10. A main rope 3 is connected to the upper frame 21. Side frames 23 are connected to both ends of the upper frame 21. The side frame 23 is arranged on the side of the car chamber 10. The side frame 23 is arranged substantially parallel to the elevating direction of the car 2. The side frame 23 is provided with a slider 23a that slides a guide rail 28 that stands upright in the hoistway. A floor frame 22 is connected to the lower end of the side frame 23.

The floor frame 22 is arranged below the car chamber 10. The floor frame 22 is provided with a plurality of anti-vibration members 12 and a load detection sensor 13. The anti-vibration members 12 are arranged at the four corners of the floor frame 22. Then, the car chamber 10 is supported by the floor frame 22 via the vibration isolator member 12. As the anti-vibration member 12, for example, an elastic member such as rubber or a spring is applied.

The load detection sensor 13 is arranged at the center of the floor frame 22, and is arranged at a position facing the center of gravity of the floor surface of the car chamber 10. Then, the load detection sensor 13 detects the load on the car chamber 10 by detecting the distance of the car chamber 10 from the floor surface. The load information detected by the load detection sensor 13 is, for example, a load ratio which is a ratio to the rated load capacity of the car 2 or a load capacity which is an amount of the load applied to the car chamber 10.

The load detection sensor 13 is not limited to the example of detecting the load based on the distance to the floor surface of the car chamber 10. The load detection sensor 13 may be provided, for example, at a position in the upper frame 21 where the main rope 3 is connected, and may detect the load on the car chamber 10 from the amount of expansion and contraction of the spring that fixes the main rope 3. Various detection methods are applied.

1-3. Example of Condition Monitoring Operation Next, an example of condition monitoring operation in the elevator 1 and the elevator system 100 having the above-described configuration will be described with reference to FIGS. 4 and 5.
FIG. 4 is a flowchart showing an example of condition monitoring operation, and FIG. 5 is an explanatory diagram showing a stress estimation database stored in the storage unit of the condition monitoring unit 7.

As shown in FIG. 4, the load detection sensor 13 detects the load applied to the car 2, and the inclination sensor 15 detects the inclination of the car chamber 10 (step S11). The detection process shown in step S11 is performed every time the car 2 moves up and down. Further, the timing of performing the detection process shown in step S11 is when the car 2 stops on an arbitrary floor and the opened door 10a closes.

Then, the load detection sensor 13 and the inclination sensor 15 output the detected signal to the control unit 6 and the condition monitoring unit 7. The condition monitoring unit 7 refers to the stress estimation database created for each component based on the received detection signal.

As shown in FIG. 5, in the stress estimation database, the vertical axis shows the load factor as load information, and the horizontal axis shows the inclination of the X-axis and the Y-axis as the inclination information. Then, the stress value calculated in advance is stored in the cell where the vertical axis and the horizontal axis intersect. Then, the condition monitoring unit 7 estimates the stress applied to each component based on the detection signal and the stress estimation database shown in FIG. 5 (step S12).

By acquiring the inclination information in this way, it is possible to consider the bias of people and luggage in the car room 10. As a result, the condition monitoring unit 7 can individually estimate, for example, the stress applied to the plurality of anti-vibration members arranged at the four corners of the car chamber 10.

Next, the condition monitoring unit 7 stores the stress value of each component estimated in step S12 and the number of activations in the storage unit (step S13). Here, the number of activations is the number of times the car 2 has moved up or down. That is, the condition monitoring unit 7 stores one ascending movement or descending movement in the car 2 as one set in the storage unit. The condition monitoring unit 7 also accumulates the time when the estimated stress is applied to the component. The time during which the stress is applied is the time for the ascending or descending movement of the car 2 in one set.

Next, the condition monitoring unit 7 estimates the degree of damage of each component or the amount of deformation of each component based on the information accumulated in the storage unit (step S14).

Next, the condition monitoring unit 7 determines whether or not the parts need to be replaced based on the degree of damage or the amount of deformation estimated in the process of step S14 (step S15). In the process of step S15, the condition monitoring unit 7 determines whether or not the parts need to be replaced depending on whether or not the estimated degree of damage or the amount of deformation exceeds a preset threshold value. In the process of step S15, when the condition monitoring unit 7 determines that it is not necessary to replace the parts, it outputs the determination result to the maintenance terminal 110 and returns to the process of step S11.

On the other hand, in the process of step S15, when the condition monitoring unit 7 determines that the parts need to be replaced, the condition monitoring unit 7 outputs the determination result to the maintenance terminal 110. Then, the maintenance terminal 110 notifies the operator that the parts need to be inspected, and the operator inspects the notified parts (step S16).

Further, when the parts are replaced, the condition monitoring unit 7 erases and initializes the information such as the number of activations and the stress of the replaced parts stored in the storage unit. By accumulating information for each part, the degree of damage and the amount of deformation of each part can be estimated individually. As a result, it is possible to identify the parts to be replaced or inspected at the time of maintenance and inspection, and it is possible to shorten the time required for maintenance and inspection.

Furthermore, by estimating the degree of damage and the amount of deformation of the parts, it is possible to determine the parts that need to be inspected or replaced before the car 2 vibrates, and the riding comfort of the car 2 deteriorates. Can be suppressed.

In addition, replacement of large devices such as the hoisting machine 5 and the control device in the elevator 1 is often performed at the time of renewal according to the legal service life. Then, it is necessary to determine whether or not the various parts of the car 2 can be safely used until the next renewal without replacing the parts.

Therefore, the condition monitoring unit 7 stores information such as stress, the number of times of activation, the degree of damage, and the necessity of replacement of the elevator 1 in the storage unit on a monthly or yearly basis. As a result, the condition monitoring unit 7 can estimate the condition of each component in consideration of the past tendency of the stress generation degree and the number of activations in the date and the number of years until the renewal work is performed.

2. 2. Example of Second Embodiment Next, the elevator system according to the second embodiment will be described with reference to FIG. The parts common to the elevator system 100 according to the first embodiment are designated by the same reference numerals, and duplicate description will be omitted.
FIG. 6 is a schematic configuration diagram showing an elevator system according to a second embodiment.

As shown in FIG. 6, the elevator system 200 according to the second embodiment includes an elevator 1 and a monitoring server 210 showing an example of an external device. The monitoring server 210 is installed at a place away from the elevator 1, for example, at a monitoring center that monitors the elevator 1. The monitoring server 210, the control unit 6 of the elevator 1, and the condition monitoring unit 7 are connected so as to be able to transmit and receive information via the network 211.

The load information detected by the load detection sensor 13 and the inclination information detected by the inclination sensor 15 are transmitted from the control unit 6 and the state monitoring unit 7 to the monitoring server 210 via the network 211. Further, the stress information for each component stored in the storage unit of the condition monitoring unit 7 is transmitted to the monitoring server 210. Then, the monitoring server 210 organizes and manages the stress information transmitted from the condition monitoring unit at regular time intervals such as day, week, or month. As a result, the monitoring server 210 can estimate the degree of damage and the amount of deformation of each component with higher accuracy, and can also estimate the stress that is expected to be applied in the future. As a result, the timing of replacing parts can be estimated with high accuracy.

Further, a monitoring server 210 may be provided, and the monitoring server 210 may perform the processes from step S12 to step S15 in the state monitoring operation shown in FIG. That is, a state monitoring unit 7 is provided in the monitoring server 210, a stress estimation database for each part and the estimated stress information are stored in the monitoring server 210, and the degree of damage and the amount of deformation for each part are estimated by the monitoring server 210. As a result, the capacity of the entire control device provided in the building structure can be reduced, and the control device can be miniaturized.

Further, when an unexpected failure occurs in the elevator 1, the monitoring server 210 changes the evaluation method of the component. As a result, the changed evaluation method can be applied to a plurality of elevators monitored by the monitoring server 210.

Since other configurations are the same as those of the elevator system 100 according to the first embodiment, their description will be omitted. The elevator system 200 having such a configuration can also obtain the same effects as the elevator system 100 according to the first embodiment described above.

3. 3. Example of Third Embodiment Next, the car of the elevator system according to the third embodiment will be described with reference to FIG. 7.
FIG. 7 is a diagram showing an upper part of a car in an elevator system according to a third embodiment.

The difference between the car according to the third embodiment and the car 2 according to the first embodiment is the configuration of the tilt sensor. Therefore, the tilt sensor will be described here, and the same reference numerals are given to the parts common to the car and the vehicle according to the first embodiment, and duplicate description will be omitted.

Here, a slight gap is formed between the slider 23a and the guide rail 28. Further, even when the guide roller is applied as the slider 23a, an elastic member is provided at the fixed portion of the guide roller. Therefore, the car frame 11 provided with the slider 23a also tilts with respect to the guide rail 28. The inclination of the car frame 11 also affects the inclination of the car chamber 10 supported by the car frame 11. However, the stress applied to the plurality of anti-vibration members 12 supporting the car chamber 10 is determined by the relative angle between the car frame 11 and the car chamber 10.

Then, the tilt sensor 37 according to the third embodiment detects the tilt angle (relative angle) of the car chamber 10 with respect to the car frame 11. As shown in FIG. 7, the tilt sensor 37 has a light receiving unit 35 and a light emitting unit 36. The light receiving unit 35 is installed on the ceiling of the car chamber 10. The light emitting unit 36 is installed in the upper frame 21 and faces the light receiving unit 35. Then, the light receiving unit 35 receives the light emitted from the light emitting unit 36.

Further, the light emitting unit 36 is, for example, a laser irradiation unit that irradiates a laser beam. The light receiving unit 35 is, for example, a PSD sensor (Position Sensing Device). Then, the light receiving unit 35 detects the inclination angle (relative angle) of the car chamber 10 with respect to the car frame 11 from the amount of deviation between the irradiation position of the laser light emitted from the light emitting unit 36 and the initial position (for example, the center). .. As a result, the stress applied to the plurality of anti-vibration members 12 supporting the car chamber 10 can be accurately estimated without being affected by the inclination of the car frame 11.

Since other configurations are the same as those of the car 2 according to the first embodiment, their description will be omitted. An elevator system having such an inclination sensor 37 can also obtain the same effects as the elevator system 100 according to the first embodiment described above.

In the tilt sensor 37 according to the third embodiment, an example in which the light receiving unit 35 is provided in the car chamber 10 and the light emitting unit 36 is provided in the car frame 11 has been described, but the present invention is not limited to this. For example, the light emitting unit 36 may be provided in the car chamber 10 and the light receiving unit 35 may be provided in the car frame 11.

4. Example of Fourth Embodiment Next, the elevator system according to the fourth embodiment will be described with reference to FIGS. 8 to 10.
FIG. 8 is a front view showing a car in an elevator system according to a fourth embodiment.

The difference between the elevator system according to the fourth embodiment and the elevator system 100 according to the first embodiment is that an acceleration sensor is used as the tilt sensor. Therefore, the same reference numerals are given to the parts common to the elevator system according to the first embodiment, and duplicate description will be omitted.

As shown in FIG. 8, the car 2B includes a car room 10 and a car frame 11. Further, the car chamber 10 is provided with the first tilt sensor 45, and the upper frame 21 of the car frame 11 is provided with the second tilt sensor 46. The first tilt sensor 45 and the second tilt sensor 46 are acceleration sensors, respectively. The first tilt sensor 45 detects the tilt of the car chamber 10, and the second tilt sensor 46 detects the tilt of the car frame 11.

Next, an example of a condition monitoring operation of the elevator system having the car 2B shown in FIG. 8 will be described with reference to FIGS. 9 and 10.

As shown in FIG. 9, first, the load detected sensor 13 detects the load applied to the car 2B. Further, the inclination of the car chamber 10 is detected by the first inclination sensor 45, and the inclination of the car frame 11 is detected by the second inclination sensor 46 (step S21). The load detection sensor 13, the first tilt sensor 45, and the second tilt sensor 46 output the detected signals to the control unit 6 and the condition monitoring unit 7 (see FIGS. 1 and 6). Further, the condition monitoring unit 7 can calculate the inclination (relative angle) of the car chamber 10 with respect to the car frame 11 from the inclination information detected by the first inclination sensor 45 and the second inclination sensor 46.

Next, the condition monitoring unit 7 estimates the stress applied to each component based on the plurality of inclination information and the stress estimation database (step S22). As described above, since the inclination of the car chamber 10 with respect to the car frame 11 can be detected, the stress applied to the plurality of anti-vibration members 12 supporting the car chamber 10 is not affected by the inclination of the car frame 11. , Can be estimated accurately. Further, the stress applied between the car frame 11 and the guide rail 28 can be accurately estimated from the inclination information of the car frame 11 by the second inclination sensor 46.

Next, the condition monitoring unit 7 stores the stress value of each component estimated in step S22 and the number of activations in the storage unit (step S23). Then, the condition monitoring unit 7 estimates the degree of damage of each component or the amount of deformation of each component based on the information accumulated in the storage unit (step S24).

As described above, the first tilt sensor 45 and the second tilt sensor 46 are acceleration sensors. Therefore, the condition monitoring unit 7 acquires acceleration data from the first tilt sensor 45 and the second tilt sensor 46 (step S25). As a result, it is possible to acquire vibration information generated when the car 2B is moved up and down, when a person or luggage is getting on and off, when the movement is started, and the like. Further, the condition monitoring unit 7 stores the acquired acceleration data in the storage unit.

The acceleration information of the car 2B depends on the state of the person in the car room 10. For example, when a person moves or rampages in the car room 10, the vibration of the car room 10 temporarily increases. If there is such a disturbance, it is preferable to exclude it from the evaluation of condition monitoring. Therefore, the condition monitoring unit 7 evaluates the acquired acceleration data (step S26).

FIG. 10 is an explanatory diagram showing a method of evaluating acceleration data. The vertical axis in FIG. 10 indicates the acceleration α, and the horizontal axis indicates the time t.
As shown in FIG. 10, the condition monitoring unit 7 calculates the average value of the acceleration data x at a plurality of points in a predetermined evaluation period T1 set in advance. The evaluation period T1 is updated by the condition monitoring unit 7 every time the acceleration data x is acquired. Then, the condition monitoring unit 7 uses the calculated average value of the acceleration data x as the evaluation point x1. Thereby, the influence of the above-mentioned temporary vibration can be excluded. Further, when calculating the average value, the average value may be calculated by excluding the acceleration data in which the absolute value of the difference from the previous acceleration data x is larger than the threshold value.

Next, the condition monitoring unit 7 determines whether or not the parts need to be replaced based on the degree of damage of each part or the amount of deformation of each part estimated in step S24 and the acceleration data evaluated in the process of step S26. Step S27). When the condition monitoring unit 7 determines in the process of step S27 that it is not necessary to replace the parts, it returns to the process of step S21.

On the other hand, in the process of step S27, when the condition monitoring unit 7 determines that the parts need to be replaced, the condition monitoring unit 7 outputs the determination result to the maintenance terminal 110. Then, the maintenance terminal 110 notifies the operator that the parts need to be inspected, and the operator inspects the notified parts (step S28).

As shown in the process of step S27, acceleration data is added to the degree of damage estimated from the stress, the number of starts, and the time to determine the replacement of parts. As a result, the state of the degree of damage to the vibration isolator member 12 and the slider 23a can be compared with the vibration information of the car 2B, and the replacement determination of the parts can be performed with higher accuracy.

In addition, when acceleration is generated, the stress applied to each component also increases. Therefore, when the condition monitoring unit 7 estimates the degree of damage and the amount of deformation, the stress applied to each component can be estimated with higher accuracy by using the acceleration data which is the dynamic operation information of the car 2B. It is possible to estimate the state of parts with higher accuracy.

Since other configurations are the same as those of the car 2 according to the first embodiment, their description will be omitted. An elevator system having such a car 2B can also obtain the same effects as the elevator system 100 according to the first embodiment described above.

Further, in the fourth embodiment, an example in which tilt sensors 45 and 46 including acceleration sensors are provided in both the car chamber 10 and the car frame 11 has been described, but the present invention is not limited to this. For example, an inclination sensor composed of an acceleration sensor is provided only in the car chamber 10. The inclination of the car frame 11 is estimated from the position information of the car 2B, the load capacity or the load ratio of the car room 10 detected by the load detection sensor 13, and the inclination information of the inclination sensor provided in the car room 10. You may.

Here, the load applied to the car chamber 10 is biased, and the main rope 3 is further extended by the load applied to the car 2B, so that the car frame 11 is tilted. Further, the extension of the main rope 3 changes depending on the position of the car 2B. Therefore, the inclination of the car frame 11 can be estimated from the position information of the car 2B and the bias of the load applied to the car room 10. As a result, not only the number of sensors can be reduced, but also the inclination of the car chamber 10 and the car frame 11 can be estimated with the same accuracy as the elevator system according to the fourth embodiment described above.

5. Method of Estimating Degree of Damage Next, an example of the method of estimating the degree of damage will be described with reference to FIG.
FIG. 11 is an SN curve diagram of any component. In FIG. 11, the vertical axis represents the stress amplitude σ, and the horizontal axis represents the number of repetitions N.

In the elevator 1, the floor and side surfaces of the car room 10, the car frame 11, and the like are made of a metal material such as steel. In the steel material, there is a fatigue limit on the SN curve shown in FIG. 11 as a physical property value, and if the stress is equal to or less than that stress, fatigue fracture does not occur. For example, as shown in FIG. 11, the number of repetitions N reaching the fracture in the first stress amplitude σ1 is the number of repetitions N1 of the first fracture, and the number of repetitions N reaching the fracture in the second stress amplitude σ2 is the number of repetitions of the second fracture. It becomes N2.

The condition monitoring unit 7 stores not only the stress but also the stress amplitude σ and the number of occurrences (repetition number) of the stress amplitude σ for the component made of the metal material in the storage unit. Then, the condition monitoring unit 7 calculates the degree of damage from the ratio of the number of times n1 and n2 in which the stress amplitudes σ1 and σ2 are generated to the first number of repeated breaks N1 and the second number of repeated breaks N2. This makes it possible to estimate the degree of damage to parts made of metal materials.

The method of estimating the degree of damage is not limited to the above-mentioned example, and for example, the local stress of the bent portion of the part or the like may be evaluated. In the evaluation of the local stress of the bent part, the degree of damage is evaluated by referring to the evaluation using the analysis model in the structure of the car and the database using the actual measurement result.

Further, the method of estimating the degree of damage of the vibration isolator member 12 made of an elastic member such as rubber or a spring is estimated not by the method using the SN curve described above but by the stress value, the number of activations and the time.

It should be noted that the embodiment is not limited to the embodiment described above and shown in the drawings, and various modifications can be carried out within a range that does not deviate from the gist of the invention described in the claims.

Further, as an elevator, for example, it can be applied to an elevator system for controlling a multicar elevator in which a plurality of cars move on the same hoistway.

Although words such as "parallel" and "orthogonal" have been used in the present specification, these do not mean only strict "parallel" and "orthogonal", but include "parallel" and "orthogonal". Further, it may be in a "substantially parallel" or "substantially orthogonal" state within a range in which the function can be exhibited.

1 ... Elevator, 2, 2B ... Car, 3 ... Main rope, 5 ... Hoisting machine, 6 ... Control unit, 7 ... Status monitoring unit, 10 ... Cage room, 10a ... Door, 11 ... Cage frame, 12 ... Prevention Shaking member, 13 ... Load detection sensor, 15, 37 ... Tilt sensor, 21 ... Upper frame, 22 ... Floor frame, 23 ... Side frame, 23a ... Slider, 28 ... Guide rail, 35 ... Light receiving part, 36 ... Light emitting part , 45 ... 1st tilt sensor, 46 ... 2nd tilt sensor, 100, 200 ... Elevator system, 110 ... Maintenance terminal (external device), 210 ... Monitoring server (external device), 211 ... Network

Claims (9)

A car room on which people and luggage can be placed and a car with a car frame that supports the car room.
A load detection sensor that detects the load applied to the car and
An inclination sensor that detects the inclination of the car and
A condition monitoring unit that receives the load information detected by the load detection sensor and the tilt information detected by the tilt sensor, and estimates the degree of damage for each part of the car based on the load information and the tilt information. ,
Elevator equipped with. The elevator according to claim 1, wherein the condition monitoring unit estimates the stress applied to each part based on the load information and the inclination information. The condition monitoring unit has a storage unit that stores the estimated stress.
The estimated stress and the number of activations of the car moving up and down are accumulated in the storage unit.
The elevator according to claim 2, wherein the condition monitoring unit estimates the degree of damage based on the stress accumulated in the storage unit and the number of activations. The storage unit stores a stress estimation database for estimating stress for each part based on the load information and the inclination information.
The elevator according to claim 3, wherein the condition monitoring unit estimates the stress of each part by using the load information, the inclination information, and the stress estimation database. The elevator according to claim 1, wherein the tilt sensor is installed on the ceiling of the car room. The tilt sensor includes a light emitting unit that irradiates light provided in the car chamber or the car frame.
The elevator according to claim 1, further comprising a light receiving unit provided in the car chamber or the car frame and receiving light emitted from the light emitting unit. The tilt sensor
A first tilt sensor provided in the car chamber to detect the tilt of the car chamber,
It has a second tilt sensor provided on the car frame and detects the tilt of the car frame.
The elevator according to claim 1, wherein the condition monitoring unit calculates the inclination of the car chamber with respect to the car frame from the inclination information detected by the first inclination sensor and the inclination information detected by the second inclination sensor. The tilt sensor comprises an acceleration sensor.
The elevator according to claim 1, wherein the condition monitoring unit acquires acceleration data from the inclination sensor. An elevator with a car that moves up and down the hoistway,
The elevator is provided with an external device connected so as to be able to send and receive information.
The elevator
A load detection sensor that detects the load applied to the car and
A tilt sensor that detects the tilt of the car is provided.
The external device or the elevator
A state monitoring unit that receives the load information detected by the load detection sensor and the tilt information detected by the tilt sensor, and estimates the degree of damage for each part of the car based on the load information and the tilt information. Elevator system equipped.

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