Elevator system and method for elevator maintenance

Abstract

Provided are: a load error amount estimation unit that estimates an error amount of a load of a car based on a load of the car and a vibration amount detected by a vibration detection sensor at the time of starting a traction machine; a resonance frequency derivation unit that derives a resonance frequency of the car; and a spring constant estimation unit that calculates a spring constant of a vibration isolation rubber provided to the car based on the vibration amount detected by the vibration detection sensor, the error amount of the load estimated by the load error amount estimation unit, and the resonance frequency derived by the resonance frequency derivation unit, and estimates a deterioration state of the vibration isolation rubber. Thus, the deterioration state of the vibration isolation rubber can be grasped, and a ride experience can be kept constant.

Description

TECHNICAL FIELD

[0001] The present application relates to an elevator system and an elevator maintenance method. BACKGROUND

[0002] An elevator is desired to produce little vibration within a car from the viewpoint of a ride experience of a passenger. Vibration of an elevator is roughly divided into at the time of startup and at the time of running. At the time of running, vibration due to a rotating body such as a motor, a sheave, or the like is generated. At the time of startup, a torque is applied to a hoisting machine in order to make a car be in a stationary state at the time of releasing a brake. The torque at this time is hereinafter referred to as a compensation torque. If there is a difference between the compensation torque and a torque required for stopping the car, vibration is generated within the car.

[0003] As a method of suppressing vibration at the time of startup of a conventional elevator, a load within the car is detected, a torque corresponding to an imbalance between a mass of the car and a mass of a counterweight including the detected load is applied to the hoisting machine, and then the brake is released. Thereby, at the time of releasing the brake, the car can be kept in a stationary state. At this time, as a main cause of generating vibration, an error between the detected load and an actually boarded load can be cited.

[0004] The load within the car is calculated, for example, from a deflection amount of a vibration isolation rubber provided below the car. However, the vibration isolation rubber is affected by deterioration over the years, a change in temperature, and the like, and a spring constant is changed. An error between the detected load and the actually boarded load is generated due to the change in the spring constant.

[0005] In the past, in order to cope with the deterioration of the vibration isolation rubber, at the time of maintenance work of the elevator, a worker carries the counterweight into the car, detects a deflection amount of each load, and performs correction. In this correction work, a burden on the worker is large, and it is necessary to stop service of the elevator at the time of adjustment work.

[0006] In Patent Literature 1, a technique is described in which an error amount of the compensation torque is detected by an encoder, the detected error amount is calculated according to an approximate straight line, a corrected compensation torque is calculated, and vibration at the time of startup of the elevator is reduced.

[0007] PRIOR ART DOCUMENTS

[0008] PATENT LITERATURE

[0009] Patent Literature 1: JP Patent Publication No. 2018-118817 SUMMARY

[0010] PROBLEMS TO BE SOLVED BY THE INVENTION

[0011] As mentioned above, in vibration damping rubber, changes in spring constant and permanent deformation occur due to temperature variations and deterioration over time. Here, if only the compensation torque is adjusted based on the amount of vibration, as described in Patent Document 1, there is a problem that the condition of the vibration damping rubber cannot be accurately monitored. If the deterioration of the vibration damping rubber is left unchecked for an extended period, there is a possibility of breakage in the worst-case scenario. Therefore, it is necessary for maintenance personnel to regularly inspect the deterioration of the vibration damping rubber on-site.

[0012] During maintenance work, such as checking the deterioration of vibration damping rubber, improvements are expected due to the heavy burden on operators and the cessation of service.

[0013] Therefore, the following technologies are sought: reducing the frequency of maintenance and repairs, and accurately monitoring the deterioration of the anti-vibration rubber based on changes in the spring constant, so as to maintain a constant riding experience.

[0014] Therefore, it is desirable to accurately monitor the deterioration of the vibration damping rubber to maintain a consistent riding experience in elevator systems and elevator maintenance methods.

[0015] Methods for solving problems

[0016] To solve the above problems, for example, the structure described below can be adopted.

[0017] This application includes various means to solve the above-mentioned problems. For example, an elevator system includes: a control device that drives a traction machine based on the load obtained from a load detection sensor that detects the load inside the elevator car, and compensates for the compensation torque of the traction machine driving the car. The elevator system includes: a load error estimation unit that estimates the load error of the car based on the car's load and the vibration detected by a vibration detection sensor when the traction machine is started; a resonant frequency derivation unit that derives the car's resonant frequency; and a spring constant estimation unit that calculates the spring constant of the anti-vibration rubber installed in the car based on the vibration detected by the vibration sensor, the load error estimated by the load error estimation unit, and the resonant frequency derived by the resonant frequency derivation unit, thereby estimating the deterioration condition of the anti-vibration rubber.

[0018] The effects of the invention

[0019] According to the present invention, by estimating the spring constant of the anti-vibration rubber, the current deterioration condition of the anti-vibration rubber can be accurately determined. Therefore, the compensation torque during startup can be appropriately adjusted based on the determined deterioration condition of the anti-vibration rubber, reducing the frequency of maintenance and maintaining a constant riding experience.

[0020] Other issues, structures, and effects not mentioned above will be clarified through the following description of the implementation methods. Attached Figure Description

[0021] Figure 1 is a diagram showing the overall structure of an elevator system of the first embodiment example of the present application.

[0022] Figure 2 is a block diagram showing the structure of the first embodiment example of the present application.

[0023] Figure 3 is a front view showing a sensor arrangement example (Example 1) of the first embodiment example of the present application.

[0024] Figure 4 is a front view showing a sensor arrangement example (Example 2) of the first embodiment example of the present application.

[0025] Figure 5 is a characteristic diagram showing an example of the estimation method of the first embodiment example of the present application.

[0026] Figure 6 is a flowchart showing the flow of processing of the first embodiment example of the present application.

[0027] Figure 7 is a characteristic diagram showing the adjustment state during sampling of the first embodiment example of the present application.

[0028] Figure 8 is a block diagram showing the structure of the second embodiment example of the present application.

[0029] Figure 9 is a flowchart showing the flow of processing of the second embodiment example of the present application.

[0030] Figure 10 is a diagram showing a display example of the second embodiment example of the present application.

[0031] Figure 11 is a block diagram showing the structure of the third embodiment example of the present application.

[0032] Figure 12 is a characteristic diagram showing the temperature-based adjustment state during sampling of the third embodiment example of the present application. DETAILED DESCRIPTION

[0033] <First Embodiment Example>

[0034] The elevator system of the first embodiment example of the present application will be described below with reference to Figures 1-7

[0035] [Structure of System]

[0036] Figure 1 shows the overall outline structure of the elevator system of the first embodiment example.

[0037] ​like Figure 1 As shown, the car 1 and the counterweight 4 are connected by a sling 5, which is wound around a pulley (not shown) of the traction machine 6. The car 1 has a car frame 2 and a car shell 3, which is mounted to the car frame 2 via vibration damping rubber 10.

[0038] The sling 5, which is wound around the pulley of the traction machine 6, transmits the driving force of the traction machine 6 to the car 1, causing the car 1 to move up and down.

[0039] At this point, the speed of the car 1 is estimated by a sensor installed on the traction machine 6 that detects the rotation angle. In the traction machine 6, the torque required to move the car 1 is determined based on the mass difference between the car 1 and the counterweight 4. However, the mass of the car 1 changes due to the passage of people and loads; therefore, the torque required by the traction machine 6 varies depending on the load inside the car 1. Therefore, the load inside the car 1 is calculated based on information from the load detection sensor 9, and the torque required by the traction machine 6 is calculated by the control device 8. Furthermore, the control device 8 is supplied with... Figure 2 The description provides presumed information on the deterioration of the vibration-damping rubber 10.

[0040] The brake 7 installed on the traction machine 6 has the function of applying braking force to the traction machine 6 to eliminate the electric motor load when the car stops.

[0041] Therefore, when the brake 7 is released, the torque required to add to the traction machine 6 is the difference between the mass of the car 1 and the counterweight 4.

[0042] In addition, Figure 1 The structure shown illustrates an example of a 2:1 rope hanging method where movable pulleys are installed in the car 1 and the counterweight 4. However, this embodiment can also be applied to a 1:1 rope hanging method where sling ends are installed in the car frame 2 and the counterweight 4.

[0043] Furthermore, the vibration of the car 1 is more accurately described as the vibration of the car shell 3 held by the car frame 2 by the anti-vibration rubber 10. In the following description, unless there is a need to distinguish, the vibration of the car shell 3 will be referred to as the vibration of the car 1 only.

[0044] [Structure of presumed deterioration of vibration-damping rubber]

[0045] Figure 2 This is a functional block diagram representing the structure of the presumed deterioration of the vibration damping rubber 10.

[0046] The load detection sensor 9 detects the load of people and cargo inside the car 1.

[0047] The load weight detected by the load detection sensor 9 will be stored in the load weight storage unit 11.

[0048] The vibration detection sensor 12 detects the vibration in the car 1 at the time of start-up.

[0049] The amount of vibration detected in the vibration detection sensor 12 is stored in the start-up time vibration amount storage section 13. Further, the vibration detected in the vibration detection sensor 12 is supplied to the resonance frequency deriving section 14. The resonance frequency deriving section 14 frequency-analyzes the vibration in the car 1 based on the supplied vibration, and derives the resonance frequency of the car.

[0050] The resonance frequency of the car is a resonance frequency determined in accordance with the rigidity of the vibration-isolating rubber 10, and the mass of the car 1 and the load. Here, since the compensation torque at the time of start-up becomes a torque corresponding to the unbalance between the car 1 and the counterweight 4, no vibration is generated in the case where the load amount detected in the load detection sensor 9 is the same as the actual load amount in the car 1.

[0051] On the other hand, in the case where vibration is generated at the time of start-up, there is an error between the load amount detected in the load detection sensor 9 and the actual load amount in the car 1. Therefore, the load error amount estimating section 15 estimates the amount of erroneous detection of the load in accordance with the information of the load amount stored in the load amount storage section 11 and the information of the vibration amount stored in the start-up time vibration amount storage section 13.

[0052] Further, the spring constant estimating section 16 estimates the actual load amount in accordance with the information of the load amount of the load amount storage section 11 and the load amount estimated in the load error amount estimating section 15. Furthermore, the spring constant estimating section 16 estimates the spring constant of the vibration-isolating rubber 10 in accordance with the actual load amount and the resonance frequency of the car derived by the resonance frequency deriving section 14, and estimates the deterioration state of the vibration-isolating rubber 10.

[0053] The information of the spring constant or the deterioration state of the vibration-isolating rubber 10 estimated by the spring constant estimating section 16 is supplied to the control device 8 of the elevator. The control device 8 corrects the parameters at the time of calculating the compensation torque of the traction machine at the time of starting the car 1 based on the information of the spring constant or the deterioration state of the vibration-isolating rubber 10. In addition, a specific example of the correction of the parameters at the time of calculating the compensation torque will be described later.

[0054] Further, in the case where the load amount storage section 11, the start-up time vibration amount storage section 13, the resonance frequency deriving section 14, the load error amount estimating section 15, and the spring constant estimating section 16 are provided as a structure for estimating the spring constant, the structure for estimating the spring constant can be provided as a structure separate from the control device 8 as shown in Figure 2 Further, in the case where the load amount storage section 11, the start-up time vibration amount storage section 13, the resonance frequency deriving section 14, the load error amount estimating section 15, and the spring constant estimating section 16 are provided as a structure for estimating the spring constant, the structure for estimating the spring constant can be provided as a structure separate from the control device 8 as shown in Figure 2 Further, in the case where the load amount storage section 11, the start-up time vibration amount storage section 13, the resonance frequency deriving section 14, the load error amount estimating section 15, and the spring constant estimating section 16 are provided as a structure for estimating the spring constant, the structure for estimating the spring constant can be provided as a structure separate from the control device 8 as shown in Figure 2 Further, in the case where the load amount storage section 11, the start-up time vibration amount storage section 13, the resonance frequency deriving section 14, the load error amount estimating section 15, and the spring constant estimating section 16 are provided as a structure for estimating the spring constant, the structure for estimating the spring constant can be provided as a structure separate from the control device 8 as shown in

[0055] [Structure for detecting vibration of car]

[0056] Figure 3 and Figure 4 Two examples of a structure for detecting vibration of a car 1 are shown (Example 1, Figure 3 : Example 1, Figure 4 : Example 2).

[0057] In order to detect the vibration of the car 1, a structure as shown in Figure 3 (Example 1), for example, a vibration detecting sensor 12 composed of an accelerometer or the like is installed in addition to the load detecting sensor 9 on the car shell 3 held by the car frame 2.

[0058] In this case, the vibration detecting sensor 12 can be composed of the same sensor as the load detecting sensor 9.

[0059] Further, the vibration detecting sensor 12 can also be configured as a distance sensor capable of measuring the relative vibration of the car shell 3 and the car frame 2. By applying the distance sensor to the vibration detecting sensor 12, vibration due to the sling or the like can be excluded, and only the vibration due to the vibration-proof rubber 10 under the car can be measured. In the case where the distance sensor is provided, it can be provided on the car shell 3 side or on the car frame 2 side. However, in the case where the distance sensor is used, since the acceleration in the car 1 cannot be measured, a differentiator for converting the displacement into the acceleration is required.

[0060] Figure 4 The structure shown in (Example 2) is a structure in which an acceleration sensor 12a is provided on the car shell 3 and an acceleration sensor 12b is provided on the car frame 2.

[0061] According to the structure shown in Figure 4 , the vibration due to the vibration-proof rubber 10 can be estimated from the difference between the acceleration detected by the acceleration sensor 12a of the car shell 3 and the acceleration detected by the acceleration sensor 12b of the car frame 2.

[0062] In addition, in the case where the division of the resonance frequency due to the car shell 3 and the vibration-proof rubber 10 and the resonance frequency due to other configurations can be performed, as shown in Figure 3 , even if the vibration detecting sensor (acceleration sensor) 12 is installed only on the car shell 3, the resonance frequency of the car shell 3 and the vibration-proof rubber can be estimated.

[0063] Here, as shown in Figure 3 , in the case where the acceleration sensor is installed on the car shell 3, the vibration in the up-and-down direction of the car shell 3 needs to be measured. Therefore, for example, if the measurement is performed at the same position as the center of gravity of the car on the ceiling or floor member of the car shell 3, the vibration in the pure up-and-down direction can be measured.

[0064] On the other hand, in the case where the distance sensor is used as the vibration detection sensor 12, it is necessary to measure the relative displacement in the up-and-down direction of the car casing 3 and the car frame 2. Therefore, by installing the distance sensor at a position where displacement occurs at the time of up-and-down vibration, such as under the ceiling or the floor, it is easy to detect the relative vibration.

[0065] Further, as shown in Figure 4 the sensor arrangement in which the acceleration sensors 12a, 12b are provided to the car casing 3 and the car frame 2, by being arranged at the same position in the vertical direction, it is possible to exclude the influence of the rotational vibration of the car or the like.

[0066] [Load error detection amount and spring constant estimation processing]

[0067] The estimation processing of the load error detection amount and the estimation processing of the spring constant of the present embodiment example will be described with reference to Figure 5

[0068] Figure 5 A of FIG. 6 and B of FIG. 7 show the relationship between the vibration of the car casing 3 (vertical axis) and the resonance frequency of the vibration isolation rubber 10 (horizontal axis). Figure 5 The load error amount estimation section 15 estimates the load error detection amount from the load of the car casing 3 stored in the load storage section 11 and the start-time vibration amount stored in the start-time vibration amount storage section 13.

[0069] Specifically, the load error amount estimation section 15 obtains the torque Te [Nm] output by the hoisting machine 6 from the detected load me [kg] in order to estimate the detection error Am [kg] of the load.

[0070] Then, if the radius of the rope wheel of the hoisting machine 6 to which the sling 5 is wound is set to r [m], the mass of the car 1 is set to m [kg], and the acceleration occurring in the car 1 is set to a [m / s2], it becomes Te / r = m x a.

[0071] Here, the car mass m is the sum of the mass mc [kg] of the car casing 3 and the load amount ml (= me + Am) [kg] of the passengers.

[0072] Therefore, the load error amount estimation section 15 can obtain the error Am of the load amount from the formula Te / r = m x a and the relationship between the respective masses mc, ml indicating the above car mass m.

[0073] The spring constant is estimated by the spring constant estimation section 16.

[0074] The spring constant is estimated by the spring constant estimation section 16.

[0075] The spring constant is estimated by the spring constant estimation section 16.When estimating the spring constant, the resonant frequency derivation unit 14 performs frequency analysis on the vibration detected by the detection sensor to obtain the resonant frequency f1 [Hz] of the car shell 3 and the anti-vibration rubber 10.

[0076] Next, using the estimated load me [kg] and the assumed spring constant k [N / m], the assumed resonant frequency f2 is obtained according to the following equation (1).

[0077]

[0078] Here, as Figure 5 As shown in A, when the measured resonant frequency f1 ≠ the assumed resonant frequency f2, the spring constant estimating unit 16 calculates the current spring constant k' based on equation (1) due to the change in the spring constant k.

[0079] That is, the spring constant estimation section 16 is based on To estimate the current spring constant k' [N / m] of the vibration damping rubber 10.

[0080] On the other hand, such as Figure 5 As shown in B, when the resonant frequency f1 [Hz] of the vibration-damping rubber 10 obtained in equation (1) is equal to the resonant frequency f2 obtained from equation (1) using the estimated load me and the assumed spring constant k [N / m], the spring constant k [N / m] is as assumed. In this case, the spring constant estimation section 16 estimates that the spring constant of the vibration-damping rubber 10 has undergone permanent deformation without change.

[0081] [The overall process of system maintenance]

[0082] Figure 6 This is a flowchart illustrating the overall process of maintenance procedures performed in the elevator system of this embodiment.

[0083] First, in order for the car 1 to move, it is necessary to press the call button installed in the building and the floor button configured in the car 1. Therefore, the call detection based on these operations is set as the starting point (step S1 1).

[0084] After the call detection in step S11, the control device 8 measures the load in the car based on the detection value of the load detection sensor 9 (step S12). Then, the control device 8 inputs a compensation torque based on the measured load information to the traction machine 6 (step S13). With the compensation torque input, the control device 8 releases the brake 7 (step S14).

[0085] Then, the control device 8 determines whether there is vibration in the car 1 when the brake is released based on the detection value of the vibration detection sensor 12 (step S15).

[0086] In a case where no vibration is generated in the car 1 (step S15 "No"), the control device 8 starts the operation of the elevator as it is without performing the estimation process of the spring constant.

[0087] On the other hand, in a case where vibration is generated in the car 1 (step S15 "Yes"), the resonance frequency deriving section 14 estimates the resonance frequency of the car 1 (step S16: resonance frequency deriving process). In parallel with the estimation of the resonance frequency, the startup vibration amount storing section 13 stores the vibration amount generated in the car 1 at startup, the loaded error amount estimating section 15 analyzes the vibration amount (step S17), and estimates the loaded amount of the error amount from the vibration amount (step S18: loaded error amount estimating process).

[0088] Next, the spring constant estimating section 16 determines whether or not the resonance frequency estimated (measured) in step S16 coincides with the assumed resonance frequency (step S19).

[0089] In a case where the estimated resonance frequency and the assumed resonance frequency do not coincide (step S19 "No"), since the spring constant has changed, the spring constant estimating section 16 performs the estimation of the spring constant of the vibration isolation rubber 10 (step S20). At the time of the estimation of the spring constant, the process described above using the A and (1) are performed. Figure 5

[0090] On the other hand, in a case where the estimated resonance frequency and the assumed resonance frequency coincide (step S19 "Yes"), since permanent deformation has occurred in the vibration isolation rubber 10 without a change in the spring constant, the spring constant estimating section 16 shifts to the estimation of the initial value of the displacement.

[0091] On the basis of the estimation of the initial value of the displacement, the spring constant estimating section 16 performs the process of estimating the spring constant for each load, and obtains the data of full loading. That is, the spring constant estimating section 16 determines whether or not the number of samples of the estimated value of the spring constant is sufficient (step S21).

[0092] Here, as for the number of data points of the samples, in a case where the temperature change is small and only annual deterioration occurs, the determination is made on the basis of data collected for a long time, for example, for one year. In addition, in a case where the temperature change between, for example, summer and winter is large among the data for one year, the determination can also be made on the basis of data for each unit of several months.

[0093] In a case where it is determined in step S21 that the number of samples is not sufficient (step S21 "No"), the spring constant estimating section 16 ends without performing a special process.

[0094] ​On the other hand, when it is determined in step S21 that the number of samples is sufficient (YES in step S21), the spring constant estimation unit 16 performs average processing of the estimated values of the spring constant obtained (step S22).

[0095] Then, the control device 8 adjusts (corrects) the control parameter for calculating the compensation torque at the start time based on the load amount, based on the average of the estimated values of the spring constant (step S23).

[0096] In this way, the control device 8 can appropriately adjust the control parameter based on the average of the spring constant by adjusting the control parameter. That is, since the deterioration state of the vibration isolation rubber 10 does not change every time the car 1 is operated, and in addition, the car 1 sometimes vibrates due to the movement of the passengers, the control parameter can be well adjusted by correcting the parameter using the average of the measurement results of a plurality of times.

[0097] Next, the spring constant estimation unit 16 performs determination of the degree of deterioration of the vibration isolation rubber 10 based on the result of the adjustment of the control parameter in step S23 (step S24). Then, the control device 8 obtains the determination result of the degree of deterioration, and determines whether or not the replacement of the vibration isolation rubber 10 is required (step S25).

[0098] When it is determined in step S25 that the replacement is required (YES in step S25), the control device 8 generates an alarm and ends (step S26). The information of the alarm is notified to, for example, a control center (central management center) that monitors the corresponding elevator. Alternatively, the information of the alarm is registered in the control device 8, and the generation of the alarm can be confirmed at the time of periodic inspection or the like.

[0099] When it is determined in step S25 that the replacement is not required (NO in step S25), the processing ends without generating an alarm.

[0100] In addition, regarding the permanent deformation at the time of determining the degree of deterioration in step S24, by deciding the threshold value in advance based on the detection range of the load detection sensor 9, it is possible to determine whether or not the replacement in step S25 is required. Regarding the spring constant of the vibration isolation rubber, in the case where the displacement due to the load is reduced due to hardening, or in the case where the displacement due to the load is increased due to softening, it is possible to determine whether or not the replacement is required in relation to the load detection accuracy of the load detection sensor 9.

[0101] [Example of determination of number of samples]

[0102] In addition, in the present embodiment example, since it is possible to estimate the spring constant for each load, at the time of determination of the number of samples in step S21, it is preferable to determine whether or not there is data of full load. That is, if there is data of full load, the nonlinearity of the vibration isolation rubber can also be taken into account.

[0103] Figure 7 An example of the judgment of the number of samples in step S21. Figure 7 A of FIG. 8, and Figure 7 The vertical axis of B of FIG. 8 is the vibration amount, and the horizontal axis is the time. Figure 7 A of FIG. 8, and Figure 7 Each of the marks O shown in B of FIG. 8 is a sample value.

[0104] Here, as shown in A of FIG. 8, in a case where the vibration amount increases as time passes during the sampling period, the correlation with the approximate line obtained from the data becomes higher. On the other hand, as shown in B of FIG. 8, in a case where the vibration deviates without depending on the passage of time during the sampling period, the correlation with the approximate line obtained from the data becomes lower. Figure 7 Figure 7

[0105] In a case where the correlation is low as shown in B of FIG. 8, it is known that the number of samples is not appropriate. That is, in a case where the state during a certain sampling period as shown in B of FIG. 8 is not correlated with the passage of time, it is judged that the number of samples is not sufficient, and in a case where the state as shown in A of FIG. 8, it is judged that the number of samples is appropriate. Thus, the number of samples can be set in accordance with the usage and the environment of each elevator. As for the correction of the sampling, it can be automatic, or a manual correction according to an alarm. Figure 7 Figure 7 Figure 6

[0106] As explained above, according to the present embodiment example, by the series of processes explained in the flowchart of FIG. 7, the permanent deformation of the vibration-proof rubber 10 and the change in the rigidity of the vibration-proof rubber 10 can be grasped. Further, according to the present embodiment example, the deterioration condition of the vibration-proof rubber 10 can be automatically judged, and furthermore, the control condition can be automatically made appropriate by adjustment of the control parameter for compensating the calculated torque, and the ride experience of the elevator can be kept constant. Figures 8-10

[0107] <2nd Embodiment Example>

[0108] Next, the elevator system of the 2nd embodiment example of the present application will be explained with reference to FIG. 9. In Figures 8-10 , the same reference numerals are attached to the same parts as the Figures 1-7 explained in the 1st embodiment example, and the repeated explanation is omitted. Figure 1

[0109] The overall structure of the elevator system of the 2nd embodiment example is the same as the system explained in the 1st embodiment example by Figure 8 . In addition, in the 2nd embodiment example, the structure for estimating the deterioration of the vibration-proof rubber is different from the 1st embodiment example.

[0110] [Structure for Estimating Deterioration of Vibration-Proof Rubber]

[0111] ​​​​​​​Figure 2 is a functional block diagram showing a structure for estimating the deterioration of the vibration isolation rubber 10 in the second embodiment example.

[0112] The door opening / closing detection sensor 31 is installed to the car outer shell 3 or the car frame 2, and detects the opening / closing of the car door. In the device in which the car door is opened, the car 1 does not move, and in the present embodiment example, the vibration within a certain time from the timing at which the door opening / closing detection sensor 31 detects the closing of the door is determined as the vibration at the time of activation, and the estimation of the spring constant is started based on the detection values of the load detection sensor 9 and the vibration detection sensor 12.

[0113] In addition, as the door opening / closing detection sensor 31, for example, by using a sensor that detects the distance of the opening of the door, the timing at which the door is about to be closed can be known, and the time for starting the measurement can be ensured.

[0114] The structure until the spring constant estimation section 16 estimates the spring constant based on the detection values of the load detection sensor 9 and the vibration detection sensor 12 is the same as that shown in Figure 8 .

[0115] Then, in the structure shown in Figure 8 , the information of the spring constant and the deterioration condition of the vibration isolation rubber 10 estimated by the spring constant estimation section 16 is stored in the deterioration condition storage section 32.

[0116] The information stored in the deterioration condition storage section 32 is displayed on the deterioration condition display section 33.

[0117] In addition, the structure shown in Figure 2 may also be built in the control device 8 as in the structure shown in Figure 9 . In this case, the deterioration condition display section 33 can use a display device not shown that is connected to the control device 8. Alternatively, the display section of a terminal device (tablet terminal, notebook computer device, etc.) held by a maintenance person who performs the maintenance work of the elevator can function as the deterioration condition display section 33. In this case, a part or all of the operation processing for determining the deterioration condition can be performed by the terminal device held by the maintenance person.

[0118] Alternatively, furthermore, the information stored in the deterioration condition storage section 32 can be transmitted to a management center, and the management center displays the deterioration condition.

[0119] In addition, in the case of transmitting the information stored in the deterioration condition storage section 32 to the terminal device or the management center, a transmission method such as wired transmission, wireless transmission, etc. is used. In the case of wireless transmission to the terminal device held by the maintenance person, the maintenance person can immediately evaluate the deterioration condition at the elevator hall, etc.

[0120] [Flow of the maintenance processing as a whole of the system]

[0121] Figure 9 is a flowchart showing the flow of the maintenance processing as a whole in the elevator system of the present embodiment example. In Figure 6 , the processing of steps S12 to S22, S24, S25 is the same as that of Figure 6 , and therefore the explanation is omitted.

[0122] First, the door opening / closing detection sensor 31 determines that the door is closed (step S31). By this determination of the door being closed, the processing proceeds to step S12, and the control device 8 measures the load amount in the car based on the detection value of the load detection sensor 9. Thereafter, the processing from the measurement in step S12 to the averaging in step S22 is the same as the processing explained in Figure 10

[0123] Then, the deterioration condition storage section 32 stores the average of the estimated values of the spring constant obtained in step S22 (step S32). Further, the spring constant estimation section 16 performs the determination of the degree of deterioration of the vibration isolation rubber 10 based on the value stored in step S23 (step S24), and determines whether or not the replacement of the vibration isolation rubber 10 is required (step S25).

[0124] In the case where it is determined in step S25 that the replacement is required (step S25 "Yes"), information that the replacement is required is stored in the deterioration condition storage section 32, and the processing is ended (step S33). The information stored in this step S33 is read out by the maintenance person at the time of the maintenance work, and is displayed on the deterioration condition display section 33.

[0125] [Example of display of deterioration condition]

[0126] Figure 10 An example of the display of the deterioration condition in the deterioration condition display section 33 is shown.

[0127] As shown in Figure 10 , a graph of the measurement values with the vertical axis as the vibration amount and the horizontal axis as the time is displayed on the screen 33a of the deterioration condition display section 33. That is, the correlation coefficients for each period are displayed on the screen 33a. With respect to the periods, a plurality of periods are displayed in units of days, units of months, units of years, and the like by the prior setting. Thereby, it is possible to grasp the tendency of the change in the environment from the display.

[0128] Figure 10 The correlation coefficients for each period shown in Figures 11-12 become information for determining in which period the inspection should be performed. Further, by showing the index of "degree of deterioration" (shown as 10% in

[0129] ​According to this embodiment, maintenance personnel can determine the deterioration status of the anti-vibration rubber 10 from the deterioration status displayed on the deterioration status display unit 33. Having confirmed the displayed information, the maintenance personnel can manually adjust the control parameters of the control device 8 based on the deterioration status. By performing this adjustment, it is no longer necessary to install a counterweight equivalent to the load in the car 1, and the riding experience can be easily restored to a constant level with minimal service downtime.

[0130] <Example of Implementation 3>

[0131] Next, refer to Figures 11-12 The elevator system of the third embodiment of the present invention will be described below. Figures 1-7 In the example described in the first embodiment, Figure 1 The same reference numerals are used for the same parts, and repeated descriptions are omitted.

[0132] The overall structure of the elevator system in the third embodiment is the same as that in the first embodiment. Figure 11 The system described is the same. Moreover, in the third embodiment, the structure for presuming the deterioration of the vibration-damping rubber differs from that in the first embodiment.

[0133] [Structure of presumed deterioration of vibration-damping rubber]

[0134] Figure 11 This is a functional block diagram representing the structure of the presumed deterioration of the vibration damping rubber 10 in the third embodiment.

[0135] In this embodiment, the elevator system includes a temperature sensor 41 that detects the temperature of the location where the elevator is installed. The temperature sensor 41 supplies the detected temperature value to the spring constant estimation unit 16. The temperature sensor 41 is preferably installed in the elevator's lifting channel, for example.

[0136] Furthermore, the spring constant estimation unit 16 determines the change in the spring constant of the anti-vibration rubber 10 caused by temperature based on the temperature detected by the temperature detection sensor 41.

[0137] Figure 2 Other parts of the structure shown are due to their relationship with... Figure 6 The structures shown are the same; therefore, the determination of the spring constant and the treatment of degradation are also based on this. Figure 12 The process described in the document will be followed.

[0138] With the temperature sensor 41, good data can be obtained. For example, when the temperature difference is large during the day, multiple corrections are needed throughout the day, but when the number of starts is small, it is difficult to obtain sufficient sampling data for correction. Therefore, the relationship between temperature and vibration is determined based on the temperature detected by the temperature sensor 41, and the control device 8 adjusts the control parameters with reference to the air temperature information in the lifting channel.

[0139] [Example of sampling acquisition methods]

[0140] Figure 12 An example of a sampling method is shown in the case of a temperature detection sensor 41.

[0141] Figure 12 The vertical axis represents the vibration amount, and the horizontal axis represents the temperature.

[0142] like Figure 1 As shown, sampling is performed at each temperature. For example, the control device 8 divides the temperature into three intervals S1, S2, and S3, and obtains the average vibration values ​​T1, T2, and T3 for each interval S1, S2, and S3. Then, the control device 8 corrects the parameters based on the average vibration values ​​of each interval.

[0143] Therefore, even with large temperature differences during the day, vibration can be reduced, thus maintaining a constant riding experience. Since the ride may be affected not only by temperature changes but also by years of degradation, it is preferable, as described in the first embodiment, to also consider the time-related factors and adjust parameters while comparing temperature and time.

[0144] In addition, when multiple elevators are installed adjacent to each other, the information from the temperature detection sensor 41 can be shared among the multiple elevators.

[0145] <Variation Example>

[0146] Furthermore, the present invention is not limited to the embodiments described above, and includes various modifications. For example, the embodiments described above have been explained in detail for ease of understanding of the present invention, but are not necessarily limited to having all the structures described.

[0147] For example, the load detection sensor 9 may not be the displacement of the car shell 3 and the car frame 2. In one example, the load of the car shell 3 (car 1) may also be measured based on the displacement of the end of the sling 5, i.e., the sleeve rod.

[0148] also, Figure 2 In a 2:1 rope elevator system as shown, the sleeve rod can be supported at the end with a spring to balance the load of multiple slings, and the load can be detected by measuring the displacement of the supporting spring.

[0149] In the case where the sleeve rod detects the load and the support portion of the sleeve rod also uses rubber, the vibration isolation rubber under the car deteriorates similarly to the vibration isolation rubber under the car. At this time, the rubber of the support portion of the sleeve rod and the vibration isolation rubber under the car deteriorate in the same manner if the materials are the same, and thus the respective deterioration conditions can be estimated from the information of the rubber of the support portion and the vibration isolation rubber.

[0150] In this case, first, an error amount of the load is calculated from the relationship between the output torque and the acceleration in the car. Next, a spring constant of the vibration isolation rubber of the car is calculated from the comparison of the calculated error amount of the load and the resonance frequency of the car. If the spring constant of the vibration isolation rubber of the car does not change, the rubber of the support portion of the sleeve rod also permanently deforms without a change in the spring constant. In the case where the spring constant of the vibration isolation rubber of the car deforms, since it can be estimated that the spring constant of the rubber of the support portion of the sleeve rod also deforms in the same tendency, in the load detection at the end of the sleeve rod, the deterioration of the vibration isolation rubber under the car and the rubber of the support portion of the sleeve rod can also be estimated.

[0151] Further, in Figure 8 , Figure 11 , Figure 6 the block diagrams shown in Figure 9 , Figure 10 the flowcharts shown in, a plurality of processes can be simultaneously executed or the order of the processes can be changed within a range that does not affect the processing result.

[0152] Further, Figure 2 the display example shown in is an example, and other display modes can also be used as long as the deterioration degree can be informed.

[0153] Further, Figure 8 , Figure 11 , ​ the block diagrams shown in show the functions performed in each embodiment example, and each function shown in the block diagrams can be constituted by a program (software) that realizes the function of the processor in addition to a hardware configuration that realizes the function. The program and the like information that realize each function can be stored in a storage device such as a memory, a hard disk, an SSD (Solid State Drive), or an IC card, an SD card, an optical disc, or the like.

[0154] Explanation of Reference Numerals

[0155] 1 … car, 2 … car frame, 3 … car shell, 4 … counterweight, 5 … sling, 6 … traction machine, 7 … brake, 8 … control device, 9 … load detection sensor, 10 … anti-vibration rubber, 11 … load amount storage unit, 12 … vibration detection sensor, 12a, 12b … acceleration sensor, 13 … start-up time vibration amount storage unit, 14 … resonance frequency derivation unit, 15 … loading error amount estimation unit, 16 … spring constant estimation unit, 31 … door opening / closing detection sensor, 32 … deterioration condition storage unit, 33 … deterioration condition display unit, 41 … temperature detection sensor.

Claims

1. An elevator system comprising: a control device that drives a traction machine on the basis of a load amount calculated from a load amount acquired from a load detecting sensor that detects a load in a car of the elevator and a compensation torque of the traction machine that is compensated for when starting the car, the elevator system characterized by comprising: a load error amount estimation section that estimates an error amount of the load amount of the car from the load amount of the car and a vibration amount detected by a vibration detecting sensor of the car when starting the traction machine; a resonance frequency deriving section that derives a resonance frequency of the car; and a spring constant estimation section that calculates a spring constant of a vibration isolation rubber provided to the car on the basis of the vibration amount detected by the vibration detecting sensor, the error amount of the load amount estimated by the load error amount estimation section, and the resonance frequency derived by the resonance frequency deriving section, and estimates a deterioration state of the vibration isolation rubber.

2. The elevator system according to claim 1, characterized in that the spring constant estimation section calculates a permanent deformation amount of the vibration isolation rubber.

3. The elevator system according to claim 1, characterized in that a parameter at the time when the control device calculates the compensation torque is adjusted on the basis of the spring constant of the vibration isolation rubber calculated by the spring constant estimation section.

4. The elevator system according to claim 2, characterized in that a parameter at the time when the control device calculates the compensation torque is adjusted on the basis of the permanent deformation amount of the vibration isolation rubber calculated by the spring constant estimation section.

5. The elevator system according to claim 2, characterized in that the permanent deformation amount of the vibration isolation rubber calculated by the spring constant estimation section is used to determine whether or not the vibration isolation rubber needs to be replaced.

6. The elevator system according to claim 1, characterized in that the resonance frequency deriving section derives the resonance frequency of the car on the basis of a variation in a distance between the car and a car frame detected by a distance sensor.

7. The elevator system according to claim 1, characterized in that the resonance frequency deriving section derives the resonance frequency of the car on the basis of a vibration detected by an acceleration sensor provided to the car.

8. The elevator system according to claim 1, characterized in that the resonance frequency deriving section derives the resonance frequency of the car on the basis of a difference between vibrations detected by acceleration sensors respectively provided to the car and a car frame.

9. The elevator system according to claim 1, characterized in that the elevator system further comprises a temperature detecting sensor, the spring constant estimation section estimates a relationship between a temperature detected by the temperature detecting sensor and the spring constant of the vibration isolation rubber calculated by the spring constant estimation section.

10. The elevator system according to claim 1, characterized in that the elevator system further comprises: a load amount storage section that stores a load detected by the load detecting sensor; and a start time vibration amount storage section that stores a vibration amount at the time of starting detected by the vibration detecting sensor. ​ The loading error amount estimation section estimates an error amount of the car's load weight based on the load weight stored in the load weight storage section and the vibration amount stored in the start-time vibration amount storage section, The control device is supplied with the deterioration condition of the anti-vibration rubber estimated by the spring constant estimation section to adjust a parameter at the time of calculating the compensation torque.

11. An elevator maintenance method applied to an elevator system that drives a traction machine that drives a car of the elevator on the basis of having calculated and compensated a compensation torque of the traction machine corresponding to a load weight obtained from a load detecting sensor that detects a load in the car of the elevator, The elevator maintenance method is characterized by comprising: a loading error amount estimation process that estimates an error amount of the car's load weight based on the car's load weight and a vibration amount detected by a vibration detecting sensor of the car at the time of starting the traction machine; a resonance frequency derivation process that derives a resonance frequency of the car; and a spring constant estimation process that calculates a spring constant of an anti-vibration rubber provided to the car based on the vibration amount detected by the vibration detecting sensor, the error amount of the load weight estimated by the loading error amount estimation process, and the resonance frequency derived by the resonance frequency derivation process, thereby estimating a deterioration condition of the anti-vibration rubber. ​

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