JP2013241247A - Elevator sheave diagnosis device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator sheave diagnosis device which can exactly grasp a wear amount of a sheave by the necessary minimum number of times of measurement and a load, and can perform the programmatic maintenance of the exchange and repair of the sheave.SOLUTION: An elevator sheave diagnosis device comprises: a pulse count means 7 for counting a pulse proportional to a rotating amount of an electric hoist 5; a rope slip amount measurement means 8 for measuring a slip amount of a rope 3 from a count value; a sheave wear amount measurement means 10 for measuring a wear amount of a sheave 4 from the count value; a rope slip amount integration means 9 for integrating a slip amount at each drive of a riding car 1; a sheave wear amount estimation means 11 for estimating a wear degree of a sheave wear amount from an integrated slip amount; and a sheave repair program notification means 12 for generating a shave repair program from a wear degree estimation result and notifies it to an external device 13. The means 10 is operated following a sheave wear amount measurement operation command which is issued by the means 11 when the integrated slip amount reaches a prescribed value before a limit point corresponding to a sheave wear amount limit value estimated in advance.

Description

  The present invention relates to an elevator sheave diagnostic apparatus having a function of automatically measuring the wear amount of a sheave around which a rope of an elevator facility is wound.

  In general, the operation control of a rope type elevator is based on the premise that sufficient traction is secured between a sheave that is rotationally driven by an electric hoist and a rope wound around the sheave. However, it is known that when the operation is repeated, wear occurs due to repeated slip between the sheave and the rope, and the diameter of the sheave gradually decreases, and at the same time, sufficient traction is not ensured.

  When the traction between the sheave and the rope cannot be secured sufficiently, the rope-type elevator equipment usually sets the weight of the counterweight in consideration of the number of passengers in the car and is more balanced than the car in the unattended state. Since the weight is designed to be heavier, it is assumed that the weight moves in an uncontrolled state in the heavy direction. Although it has a mechanism that can automatically stop even in such a situation, it not only causes a delay in operation control, but also involves the risk of an abnormality occurring during the lifting and lowering operation of the user's car It can be said that this is an undesirable situation.

  Therefore, in order to avoid a situation where the weight balance due to wear of the sheave is lost, maintenance personnel regularly check the wear condition of the sheave, and if the degree of wear exceeds a certain standard, the sheave I try to exchange. However, in recent rope-type elevator equipment, space saving of the machine room is required, and there are many environments where it is difficult to inspect the sheaves, such as machine room-less types and machine rooms that are very narrow, In addition, there is a problem that the judgment of the maintenance staff who regularly inspects also varies.

  In order to solve these problems, techniques for measuring the amount of sheave wear have also been proposed. As a well-known technique, “elevator control device” that can check the sheave wear reliably and easily with a simple operation, reduce the variation of the check by maintenance personnel, and improve the safety of the elevator (Patent Document) 1).

JP-A-5-43156

  The technique of Patent Document 1 described above has an automatic measurement operation function when a maintenance worker performs a periodic inspection, or when the elevator car is in a free state where there is no user, or when there is a margin in operation service. Checks the sheave wear state and performs sheave replacement processing when the wear exceeds a certain standard, and its automatic measurement operation function stores the pulse count difference between floors at sheave replacement or elevator installation. In addition, the amount of sheave wear is calculated and notified by comparing with the pulse difference counted during actual traveling at the time of inspection.

  However, according to the technique of Patent Document 1, the conditions for calculating the sheave wear amount by the automatic measurement operation function are the period when there is no user in the car, the time zone in which the driving service has a margin, etc. in addition to the periodic inspection. As a result, the frequency of measurement that satisfies the conditions frequently occurs and the number of times that the measurement can be performed increases, so that the wear of the sheave itself is advanced by driving to measure the amount of sheave wear other than the driving service, or the power for that. In addition to the problem of consuming more than necessary, it basically detects when the amount of sheave wear becomes abnormal, so the remaining life of the sheave is predicted from the calculated amount of sheave wear. There is an inconvenience that it is not possible to systematically maintain by notifying a repair plan such as replacement of a sheave or repair timing.

  The present invention has been made to solve such problems, and its technical problem is that it is possible to accurately grasp the amount of sheave wear by suppressing excessive power consumption and sheave wear as much as possible, and replacing the sheave. Another object is to provide an elevator sheave diagnostic device capable of informing a management side of a repair plan such as a repair time and the like and systematically maintaining it.

  In order to solve the above technical problem, the basic configuration of the present invention is an elevator sheave diagnosis having a function of notifying a repair plan based on the result of automatically measuring the amount of wear of the sheave around which the rope of the elevator equipment is wound. A pulse count means for counting pulses proportional to the amount of rotation of the electric hoist for rotating the sheave, and a rope slip amount measuring means for measuring a rope slip amount based on a count value by the pulse count means And a sheave wear amount measuring means for measuring the sheave wear amount based on the count value, a rope slip amount integrating means for integrating the slip amount by the rope slip amount measuring means for each operation of the elevator car, and a rope slip Based on the amount of slip accumulated by the amount integrating means, Sheave wear amount estimation means for estimating the degree of wear, and sheave repair plan notification means for generating a sheave repair plan from the wear degree estimation result by the sheave wear amount estimation means and notifying an external device installed at a remote location The sheave wear amount estimating means issues a sheave wear amount measuring operation command when the accumulated slip amount reaches a predetermined value before the limit point corresponding to a preset sheave wear amount limit value, and the sheave wear amount measuring means. Is characterized in that the sheave wear amount is measured in accordance with the sheave wear amount measurement operation command.

  According to the elevator sheave diagnostic apparatus of the present invention, when estimating the wear degree in the sheave wear amount based on the accumulated slip amount based on the accumulated slip amount that is always measured and accumulated for each elevator car operation of the elevator equipment, When the slip amount reaches a predetermined value before the limit point corresponding to the preset sheave wear amount limit value, the sheave wear amount measurement operation is commanded to measure the sheave wear amount, so that excess power consumption As a result, the wear amount of the sheave can be grasped by suppressing the sheave wear and the sheave as much as possible, and the maintenance plan such as replacement of the sheave and the repair timing is notified to the management side, so that the maintenance can be performed systematically.

1 is a schematic block diagram illustrating a basic configuration of an elevator sheave diagnostic device according to Embodiment 1 of the present invention. FIG. 2 is a correlation diagram showing the relationship of the sheave wear amount to the integrated slip amount indicating the wear level before correction used by the sheave wear amount estimating means provided in the elevator sheave diagnostic device shown in FIG. 1. FIG. 2 is a correlation diagram showing the relationship of the sheave wear amount with respect to the integrated slip amount indicating the degree of wear after correction used by the sheave wear amount estimating means provided in the elevator sheave diagnostic device shown in FIG. 1. It is the flowchart which showed the operation | movement process including correction | amendment of the correlation value of the abrasion degree which concerns on the sheave diagnosis of the sheave diagnosis apparatus for elevators shown in FIG. It is the correlation figure which showed the relationship of the amount of sheave wear with respect to the integrated slip amount which shows the degree of wear after the re-correction used by the sheave wear amount estimation means with which the sheave diagnosis device for elevators according to Embodiment 2 of the present invention is provided. 6 is a flowchart showing an operation process including re-correction of the correlation value of the degree of wear related to the sheave diagnosis of the elevator sheave diagnosis apparatus described in FIG. 5.

  Hereinafter, several examples of the elevator sheave diagnostic apparatus of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic block diagram showing the basic configuration of an elevator sheave diagnostic apparatus according to Embodiment 1 of the present invention. In this elevator sheave diagnostic device, a car 1 is coupled to one end of a rope 3 and an intermediate portion of the rope 3 having a counterweight 2 coupled to the other end is wound and an electric hoist (motor M ) It has a function of notifying a repair plan based on the result of automatically measuring the amount of wear of the sheave 4 that is rotationally driven by 5.

  A specific description will be given with reference to FIG. In this elevator sheave diagnostic apparatus, a rotary encoder (RE) 6 is installed in an electric hoist 5. The elevator sheave diagnosis apparatus in this embodiment includes a pulse count means 7 for counting pulses through a rotary encoder (RE) 6 that generates pulses in proportion to the amount of rotation of the electric hoist 5, and a pulse count means. 7, a rope slip amount measuring means 8 for measuring the slip amount of the rope 3 based on the count value by 7, a sheave wear amount measuring means 10 for measuring the wear amount of the sheave 4 based on the count value, and the elevator car 1 Rope slip amount integrating means 9 for integrating the slip amount by the rope slip amount measuring means 8 for each operation, and the degree of wear in the sheave wear amount by the sheave wear amount measuring means 10 based on the accumulated slip amount by the rope slip amount integrating means 9 The sheave wear amount estimating means 11 for estimating the wear degree estimation by the sheave wear amount estimating means 11 Results generates a sheave repair plans configured with a sheave repair plan notifying unit 12 to notify the external device (remote monitoring center) 13 that is installed in a remote location, a. Here, the sheave wear amount measuring means 10 has reached a predetermined value before the limit point corresponding to the sheave wear amount limit value set in advance by the sheave wear amount estimating means 11 by the rope slip amount integrating means 9. The amount of wear of the sheave 4 is measured according to the sheave wear amount measurement operation command issued in this case.

  Among these, the sheave wear amount estimation means 11 includes a storage means (memory) 14 that stores in advance a correlation value (characteristic estimation line) between an integrated slip amount indicating a wear degree characteristic and a sheave wear amount. It has a function of correcting the correlation value based on the measurement result of the sheave wear amount by the amount measuring means 10. Further, as will be described in detail later, the sheave wear amount estimation means 11 corresponds to the sheave wear amount limit value from the period until the predetermined value of the integrated slip amount is reached based on the corrected correlation value. In addition to having the function of estimating the remaining life period by deriving the period until the accumulated slip amount limit point, if a corrected correlation value is obtained, a specific value exceeding the predetermined value of the accumulated slip amount is derived, It has a function to estimate the life arrival time by deriving the remaining period from the specific value corresponding to the sheave wear amount limit value until reaching the accumulated slip amount limit point. Thereby, the sheave repair plan notifying means 12 notifies the external device 13 of the remaining life period or the life reaching time obtained from the sheave wear amount estimating means 11 as a sheave repair plan. The external device 13 can be replaced by a maintenance console other than the remote monitoring center. Note that the measurement of the amount of wear of the sheave 4 by the sheave wear amount measuring means 10 is preferably performed during low-speed operation of the car 1 where the slip of the rope 3 is unlikely to occur.

  FIG. 2 is a correlation diagram showing the relationship of the sheave wear amount [mm] with respect to the integrated slip amount [mm] indicating the wear level before correction used by the sheave wear amount estimating means 11. Referring to FIG. 2, the sheave wear amount estimation line Sa (before correction) Sa estimated from the correlation between the integrated slip amount and the sheave wear amount is a correlation value indicating the characteristics of the wear degree, and the sheave wear amount estimating means 11 is in advance. Is stored in the storage means 14 included. In addition, a sheave wear amount limit value L set in advance, a sheave wear amount measurement operation command point A corresponding to a predetermined value for the integrated slip amount, a sheave wear amount estimation line Sa (before correction), and a sheave wear amount limit value L The integrated slip amount limit point (before correction) Ba obtained from the intersection of the two is shown. That is, in FIG. 2, in the integrated slip amount, the sheave wear amount measurement operation command point A becomes a predetermined value before the integrated slip amount limit point (before correction) Ba corresponding to the preset sheave wear amount limit value L. Then, the sheave wear amount estimating means 11 monitors the integrated slip amount calculated by the rope slip amount integrating means 9, and when the accumulated slip amount reaches the sheave wear amount measuring operation command point A, the sheave wear amount measuring operation command is issued. This indicates that the sheave wear amount measuring means 10 measures the wear amount of the sheave 4.

  FIG. 3 is a correlation diagram showing the relationship of the sheave wear amount [mm] to the integrated slip amount [mm] indicating the corrected degree of wear used by the sheave wear amount estimating means 11. However, in FIG. 3, the contents described in FIG. 2 are also shown in comparison. Referring to FIG. 3, the sheave wear amount estimation line (before correction) Sa, the sheave wear amount limit value L, the sheave wear amount measurement operation command point A, and the integrated slip amount limit point (before correction) Ba described in FIG. On the other hand, the sheave wear amount measuring operation is performed at the sheave wear amount measuring operation command point A, and the sheave wear amount W measured by the sheave wear amount measuring means 10 and the integrated slip amount calculated by the rope slip amount integrating means 9 are determined. The sheave wear amount estimation line (after correction) Sb obtained by the sheave wear amount estimation means 11 is corrected with respect to the sheave wear amount estimation line (before correction) Sa, and the sheave wear amount estimation line (after correction) Sb and the sheave. A state in which the integrated slip amount limit point (after correction) Bb newly obtained from the intersection with the wear amount limit value L is corrected with respect to the integrated slip amount limit point (before correction) Ba. It is. Further, regarding the integrated slip amount, the period until reaching the sheave wear amount measuring operation command point A is a period Ta until diagnosis, and from the sheave wear amount measuring operation command point A to the integrated slip amount limit point (after correction) Bb. Is the remaining lifetime Tb.

  FIG. 4 is a flowchart illustrating an operation process including correction of the correlation value of the degree of wear according to the sheave diagnosis of the elevator sheave diagnosis apparatus according to the first embodiment. The operation process related to the sheave diagnosis is based on the assumption that the elevator equipment is newly installed after the operation starts, or that the installation or sheave replacement (step S1) is performed when the sheave 4 is replaced. The stop position of each floor is stored by performing a well-known floor height measurement operation (step S2). The floor height measurement operation is carried out at a low speed operation with respect to the car 1 in which no slip occurs between the rope 3 and the sheave 4 in order to memorize an accurate stop position, and each floor is determined from the pulse count value measured by the pulse counting means 7. The stop position of the floor is memorized.

  Next, the rope slip amount measuring means 8 measures the slip amount of the rope 3 generated during normal operation (that is, high speed operation) (step S3). Incidentally, the measurement (calculation) of the slip amount of the rope 3 is a well-known technique, and although not described in detail here, for example, the technique disclosed in Japanese Patent Application Laid-Open No. 2006-306581 can be applied. The technical outline is to detect the distance between the stop positions of the floor car 1 set in advance by detecting the passing of the stop position of the car 1 on each floor based on the count value of the pulse. The distance between the stop positions of the car 1 on the floor and the value obtained by calculating the movement distance between the stop positions of the car 1 on the floor by the car position calculation means are compared. If there is a deviation between the values, the deviation is taken as the slip amount.

  Further, after the rope slip amount integrating means 9 sequentially integrates the slip amount of the rope 3 previously measured for each operation of the car 1 (step S4), the integrated slip amount is calculated, and then the sheave wear amount estimating means 11 It is determined (step S5) whether or not the integrated slip amount has become a substantial amount and the sheave wear amount measurement operation command point A, which is the predetermined value shown in FIG. 2, has been reached. As a result of this determination, if it has not reached, it returns to before the determination (step S5) to continue the determination, but if it has reached, the sheave wear amount estimation means 11 will contact the sheave wear amount measurement means 10 Then, only for the first time (one time), a sheave wear amount measuring operation is commanded (step S6), and a sheave wear amount measuring operation command signal is issued.

  Therefore, in the sheave wear amount measuring means 10, prior to measuring the wear amount of the sheave 4 in accordance with the sheave wear amount measurement operation command signal, the elevator equipment, for example, the inside of the car 1 is unmanned and the no-call state is 3 It is determined whether or not a predetermined condition such as a case of continuing for a minute is satisfied (step S7), and if not satisfied, the determination is continued before returning to the determination (step S7). If so, sheave wear amount measurement operation (diagnosis) is performed (step S8). The sheave wear amount measuring operation here is also carried out at a low speed operation with respect to the car 1 in which no slip occurs between the rope 3 and the sheave 4 in order to avoid the wear of the jeep 4 as much as possible. Based on the pulse count value measured by the pulse counting means 7, the sheave wear amount W is calculated (step S9). The measurement of the sheave wear amount W was memorized in the pulse count value difference (pulse difference) between the floors at the time of sheave replacement or installation of the elevator equipment, and was counted during actual driving during maintenance and inspection. A technique or the like for calculating the sheave wear amount W by comparing with a difference in pulse count values (pulse difference) can be applied.

  Subsequently, the sheave wear amount estimation means 11 determines whether or not the sheave wear amount W is less than the sheave wear amount limit value L shown in FIG. 2 (step S10). As a result of this determination, the practical probability is extremely low, but if it is not less than the sheave wear amount limit value L (if it is already greater than or equal to the sheave wear amount limit value L), the sheave repair plan notification means 12 that has received this result The reaching of the limit value of the sheave wear amount W is notified to the external device 13 (step S14), and the maintenance process on the management side performs the sheave repair (step S15), thereby ending the operation process. Incidentally, in the sheave repair, the sheave 4 is replaced or repaired. On the other hand, if the sheave wear amount limit value L is less than L, the integrated slip amount limit point is increased by redrawing the sheave wear amount estimation line in accordance with the measurement result sheave wear amount W and correcting the correlation value. (Step S11), the integrated slip amount limit point (before correction) Ba is changed to the integrated slip amount limit point (after correction) Bb. That is, the sheave wear amount estimating means 11 adjusts the sheave wear amount estimation line (before correction) Sa stored as shown in FIG. 2 in the initial stage according to the sheave wear amount W as a measurement result. 3 is corrected to the sheave wear amount estimation line (after correction) Sb as shown in FIG. 3, the accumulated slip amount assumed that the sheave 4 wear amount reaches the sheave wear amount limit value L is expressed as an accumulated slip limit point ( Before correction) Ba is corrected to the integrated slip limit point (after correction) Bb. As a result, the correlation value between the integrated slip amount indicating the wear degree characteristic and the sheave wear amount can be corrected so as to approximate the actual condition, and the sheave wear amount W is detected to have reached the sheave wear amount limit value L. Accuracy can be improved.

  Thereafter, as shown in FIG. 3 by the sheave wear amount estimation means 11, the sheave wear amount W is based on the period Ta from the installation of the elevator equipment or the sheave replacement to the diagnosis until the sheave wear amount measurement operation command point A. Calculates the remaining sheave life period Tb (estimated value) until the sheave wear amount limit value L is reached (step S12), and passes the calculation result to the sheave repair plan notification means 12 to notify the external device 13 (ie, This function makes it possible to predict the remaining life of the sheave 4 that could not be known in the past, so that the maintenance of the sheave 4 can be carried out systematically), and the accumulated slip amount further increases, and the accumulated slip amount limit point ( After correction, it is determined whether or not Bb has been reached (step S13). As a result of this determination, if it has not reached, the process returns to the previous determination (step S13) to continue the determination, but if it has reached, the sheave repair plan notification means 12 that has received this result will receive the sheave wear amount. The reaching of the limit value of W is notified to the external device 13 (step S14), and the maintenance inspector on the management side performs the sheave repair (step S15), and the operation process is ended. At this time, since the maintenance inspector on the management side recognizes the sheave remaining life period Tb (estimated value) in step S12 in advance, sheave repair can be performed with good setup. Incidentally, the sheave wear amount estimation means 11 is associated with the process of calculating the sheave remaining life period Tb (estimated value) (step S12), and the integrated slip amount is set as a specific value exceeding the sheave wear amount measurement operation command point A. For example, when reaching a specific value before reaching the integrated slip amount limit point (after correction) Bb after exceeding the integrated slip amount limit point (before correction) Ba, the integrated slip amount limit point (after correction) is reached. It is also possible to estimate the life arrival time based on the period until reaching Bb and notify it as a sheave repair plan.

  According to the elevator sheave diagnostic apparatus according to the first embodiment, the degree of wear in the sheave wear amount is estimated based on the integrated slip amount obtained by constantly measuring and integrating the slip amount of the rope 3 for each operation of the elevator car 1. In this case, only when the integrated slip amount reaches the sheave wear amount measurement operation command point A which is the first predetermined value, the operation for measuring the sheave wear amount only needs to be performed once. Problems such as advancing the wear of the sheave 4 or consuming more power than necessary due to the operation itself for measuring the quantity do not occur. Further, based on the sheave wear amount W obtained from the operation result for measuring the sheave wear amount only once, based on the remaining life period Tb of the sheave 4 or the specific value exceeding the integrated slip amount limit point (before correction) Ba. Since it is possible to predict the end of life until the accumulated slip amount limit point (after correction) Bb is reached, replacement and repair of the sheave 4 can be performed systematically. As a result, the amount of wear on the sheave 4 can be accurately grasped with the minimum number of measurements and load without requiring excessive power consumption and sheave wear, and the repair plan for sheave 4 replacement and repair timing is managed. Can be maintained in a planned manner.

  The elevator sheave diagnostic apparatus according to the second embodiment is the same as the apparatus according to the first embodiment shown in FIG. 1 in terms of the basic configuration, but the sheave wear amount in terms of the functional configuration as compared with the apparatus according to the first embodiment. By correcting the correlation value again by performing the measurement operation again, the correction accuracy of the correlation value in the sheave wear amount estimation means 11 is further improved, and the detection accuracy to reach the sheave wear amount limit value L is improved. It is different.

  FIG. 5 is a correlation showing the relationship between the amount of sheave wear and the cumulative slip amount indicating the degree of wear after re-correction used in the sheave wear amount estimation means 11 provided in the elevator sheave diagnostic apparatus according to Embodiment 2 of the present invention. FIG. However, in FIG. 5, the contents described in FIG. 3 are also shown in comparison. Referring to FIG. 5, the sheave wear amount measurement operation is performed again, and the sheave wear amount Wc measured again by the sheave wear amount measuring means 10 and the accumulated slip amount calculated by the rope slip amount integrating means 9 are used. The sheave wear amount estimation line (after recorrection) Sc obtained by the wear amount estimation means 11 is corrected with respect to the sheave wear amount estimation line (after correction) Sb, and the sheave wear amount estimation line (after recorrection) Sc It shows a state where the integrated slip amount limit point (after re-correction) Bc newly obtained from the intersection with the sheave wear amount limit value L is corrected with respect to the integrated slip amount limit point (after correction) Bb. In addition, regarding the integrated slip amount, a period from the integrated slip amount limit point (after correction) Bb to the integrated slip amount limit point (after recorrection) Bc is a remaining life period (reset) Tc.

  FIG. 6 is a flowchart illustrating an operation process including re-correction of the correlation value of the degree of wear according to the sheave diagnosis of the elevator sheave diagnosis apparatus according to the second embodiment. Compared with the operation process shown in FIG. 4, this operation process is exactly the same in steps S <b> 1 to S <b> 12. In this operation process, as a result of determining whether or not the accumulated slip amount has reached the accumulated slip amount limit point (after correction) Bb with a specific value (step S13), the processing that continues when the accumulated slip amount has reached is different. Specifically, the sheave wear amount estimating means 11 instructs the sheave wear amount measuring means 10 to perform another sheave wear amount measuring operation (step S26), and reissues the sheave wear amount measuring operation command signal. .

  Therefore, in the sheave wear amount measuring means 10, prior to the measurement of the wear amount of the sheave 4 again in accordance with the sheave wear amount measurement operation command signal again, the elevator equipment is unmanned in the car 1, for example, and there is no call. It is determined whether or not a predetermined condition such as when the state continues for 3 minutes is satisfied (step S27), and if not satisfied, the determination is continued before the determination (step S27). However, if satisfied, the sheave wear amount measurement operation (diagnosis) is performed again (step S28). The sheave wear amount measurement operation here is also performed at a low speed operation with respect to the car 1 in which no slip occurs between the rope 3 and the sheave 4 in order to avoid the wear of the sheave 4 as much as possible. Based on the pulse count value measured by the pulse counting means 7, the sheave wear amount Wc is calculated (step S29). For measuring the sheave wear amount Wc, the same technique as that for measuring the sheave wear amount W described with reference to FIG. 4 can be applied.

  Subsequently, the sheave wear amount estimation means 11 determines whether or not the sheave wear amount Wc is equal to or greater than the sheave wear amount limit value L shown in FIG. 5 (step S30). As a result of this determination, if the sheave wear amount limit value L is assumed to be considerably high in terms of probability, the sheave repair plan notification means 12 that has received this result reaches the external device 13 that the sheave wear amount Wc has reached the limit value. Notification (step S14) is made, and the maintenance inspector on the management side performs the sheave repair (step S15), and the operation process is terminated. Incidentally, in the sheave repair, the sheave 4 is replaced or repaired. On the other hand, if the sheave wear amount limit value L is less than the limit value L, there is no need to repair the sheave 4 at this point. Therefore, the sheave wear amount estimation line is redrawn according to the sheave wear amount Wc as the measurement result, and the correlation value is obtained. By correcting, the integrated slip amount limit point is corrected to be further increased (step S31), and the integrated slip amount limit point (after correction) Bb is changed to the integrated slip amount limit point (after recorrection) Bc. That is, in the sheave wear amount estimation means 11, the sheave wear amount estimation line (after correction) Sb stored in the previous stage is matched with the sheave wear amount Wc as a measurement result, as shown in FIG. By further correcting to the amount estimation line (after re-correction) Sc, the integrated slip amount assumed that the sheave 4 wear amount reaches the sheave wear amount limit value L is integrated from the integrated slip limit point (after correction) Bb. The slip limit point (after re-correction) is corrected to Bc. Thereby, it is possible to correct the correlation value between the integrated slip amount indicating the wear degree characteristic and the sheave wear amount so as to more closely approximate the actual state, and that the sheave wear amount Wc has reached the sheave wear amount limit value L. The accuracy of detection can be improved.

  Thereafter, as shown in FIG. 5 by the sheave wear amount estimating means 11, the period until the diagnosis, which is the period until the accumulated slip amount reaches the accumulated slip amount limit point (after correction) Bb in the previous stage, and the remaining time. Based on the sum (Ta + Tb) with the life period Tb, the remaining sheave life period Tc (estimated value) until the sheave wear amount Wc reaches the sheave wear amount limit value L is recalculated (step S32), and the result of the sheave is calculated. After handing over to the repair plan notification means 12 to notify the external device 13 again (that is, the remaining life of the sheave 4 can be predicted with higher accuracy by this function), the accumulated slip amount further increases and the accumulated amount is increased. It is determined whether or not the slip amount limit point (after re-correction) Bc has been reached (step S33). As a result of this determination, if it has not reached, the process returns to the previous determination (step S33) to continue the determination. If it has reached, the sheave repair plan notifying means 12 that has received this result will receive the sheave wear amount. The reaching of the limit value of Wc is notified to the external device 13 (step S14), and the maintenance inspector on the management side performs the sheave repair (step S15), and the operation process is ended. Incidentally, the sheave wear amount estimation means 11 is associated with the process of calculating the sheave remaining life period Tc (estimated value) (step S32), and the integrated slip amount is set as a specific value exceeding the sheave wear amount measurement operation command point A. For example, when a specific value before reaching the integrated slip amount limit point (after re-correction) Bc after reaching the integrated slip amount limit point (after correction) Bb is reached, the integrated slip amount limit point (re-correction) Later) It is also possible to estimate the life arrival time according to the period until it reaches Bc and notify it as a sheave repair plan.

  According to the elevator sheave diagnosis device according to the second embodiment, the sheave wear amount estimation means 11 has integrated slip amount limit point corresponding to the sheave wear amount limit value L in the corrected correlation value for the integrated slip amount (after correction). When Bb is reached, the sheave wear amount measuring operation command is issued again, and the sheave wear amount measuring means 10 again measures the sheave wear amount Wc according to the sheave wear amount measuring operation command again, and thereby the sheave wear amount estimating means. 11 is a correction of the correlation value again based on the measurement result of the sheave wear amount Wc by the sheave wear amount measuring means 10 again, and the integrated slip amount updated based on the correlation value corrected again by the sheave repair plan notification means 12. Remaining life period (reset) Tc from limit point (after correction) Bb to integrated slip amount limit point (after recorrection) Bc, or integrated slip amount limit In order to re-notify the external device 13 of the end of life from the specific value exceeding the point (after correction) Bb until reaching the cumulative slip amount limit point (after re-correction) Bc, the sheave wear amount Wc is The accuracy of detecting that the sheave wear amount limit value L has been reached can be further improved.

  In the above-described second embodiment, as a result of determining whether or not the integrated slip amount limit point (after re-correction) Bc has been reached (step S33), reaching the limit value of the sheave wear amount Wc is externally determined. The apparatus 13 is notified (step S14), and the management side maintenance inspector has explained that the process shifts to the sheave repair (step S15). However, when the accumulated slip amount limit point (after correction) Bc is reached. Whether the sheave wear amount measurement operation command is issued again, and the same processing is added (additional amount in comparison with FIG. 4 in FIG. 6) to determine whether the sheave wear amount reaches the sheave wear amount limit value L. If it is made to measure, it becomes possible to improve a precision further. However, the amount of wear of the sheave 4 can be accurately grasped with the minimum number of measurements and load without requiring excessive power consumption and sheave wear, and the repair plan of the sheave 4 is notified to the management side and planned. In consideration of the balance with the fact that it can be maintained, it is desirable that the number of times of the sheave wear amount measurement operation be repeated approximately 2 to 3 times.

DESCRIPTION OF SYMBOLS 1 Car 2 Balance weight 3 Rope 4 Sheave 5 Electric hoist (Motor M)
6 Rotary encoder (RE)
7 Pulse count means 8 Rope slip amount measuring means 9 Rope slip amount integrating means 10 Sheave wear amount measuring means 11 Sheave wear amount estimating means 12 Sheave repair plan notifying means 13 External device (remote monitoring center)
14 Storage means

Claims (8)

An elevator sheave diagnostic device having a function of notifying a repair plan based on a result of automatically measuring the wear amount of a sheave around which a rope of an elevator facility is wound,
Pulse count means for counting pulses proportional to the amount of rotation of the electric hoist that rotationally drives the sheave; rope slip amount measuring means for measuring the slip amount of the rope based on the count value by the pulse count means; A sheave wear amount measuring means for measuring the wear amount of the sheave based on the count value; a rope slip amount integrating means for integrating the slip amount by the rope slip amount measuring means for each operation of the elevator equipment car; Sheave wear amount estimation means for estimating the degree of wear in the sheave wear amount by the sheave wear amount measurement means based on the accumulated slip amount by the rope slip amount accumulation means, and sheave repair from the wear degree estimation result by the sheave wear amount estimation means Sieve repair meter that generates a plan and notifies an external device installed at a remote location Includes a notification means, the,
The sheave wear amount estimation means issues a sheave wear amount measurement operation command when the accumulated slip amount reaches a predetermined value before a limit point corresponding to a preset sheave wear amount limit value,
The sheave wear amount measuring means measures the sheave wear amount in accordance with the sheave wear amount measurement operation command.   2. The elevator sheave diagnostic apparatus according to claim 1, wherein the sheave wear amount estimating means includes storage means for storing in advance a correlation value between the integrated slip amount indicating the wear degree characteristic and the sheave wear amount. An elevator sheave diagnostic device characterized by the above.   3. The elevator sheave diagnostic apparatus according to claim 2, wherein the sheave wear amount estimating means corrects the correlation value based on a measurement result of the sheave wear amount by the sheave wear amount measuring means. Sheave diagnostic device.   4. The elevator sheave diagnosis device according to claim 3, wherein the sheave wear amount estimation means starts from a period until the predetermined value of the integrated slip amount is reached based on the corrected correlation value. An elevator sheave diagnostic apparatus characterized in that a remaining life period is estimated by deriving a period until an accumulated slip amount limit point corresponding to a limit value is reached.   5. The elevator sheave diagnostic apparatus according to claim 4, wherein the sheave wear amount estimating means, when reaching a specific value exceeding the predetermined value of the integrated slip amount, based on the corrected correlation value, An elevator sheave diagnosis apparatus for estimating a life reaching time by deriving a period from a specific value to an integrated slip amount limit point corresponding to the sheave wear amount limit value.   6. The elevator sheave diagnosis apparatus according to claim 4, wherein the sheave repair plan notification means notifies the external device of the remaining life period or the life arrival time as the sheave repair plan. Sheave diagnostic device.   6. The elevator sheave diagnostic apparatus according to claim 5, wherein the sheave wear amount estimation means has reached an accumulated slip amount limit point corresponding to the sheave wear amount limit value in the corrected correlation value for the accumulated slip amount. The sheave wear amount measuring operation command is issued again, the sheave wear amount measuring means again measures the sheave wear amount according to the second sheave wear amount measuring operation command, and the sheave wear amount estimating means The correlation value is corrected again based on the measurement result of the sheave wear amount measured again by the sheave wear amount measuring means, and the sheave repair plan notification means is updated based on the corrected correlation value. An elevator sheave diagnostic apparatus characterized by re-notifying the external device of the period or the life reaching timing as the sheave repair plan   2. The elevator sheave diagnosis device according to claim 1, wherein the sheave wear amount measuring means measures the sheave wear amount during low-speed operation of the car where the rope is unlikely to slip. Sheave diagnostic device.

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