JP7197059B2 - Elevator system and inspection terminal - Google Patents

Description

The present disclosure relates to elevator systems and inspection terminals.

DE 10 2005 000 030 A1 describes a device for inspecting ropes. The device described in Patent Literature 1 includes a light projector and a light receiver. A rope is arranged between the projector and the receiver. Laser light emitted from the projector hits the rope. Also, the light receiver receives the laser light emitted from the light projector. The outer shape of the rope is detected based on the signal output from the light receiver.

Japanese Patent Application Laid-Open No. 2008-214037

The device described in Patent Document 1 has the problem that additional equipment such as a light projector and a light receiver is required in order to determine that the rope has deteriorated.

The present disclosure has been made to solve the problems described above. SUMMARY OF THE DISCLOSURE It is an object of the present disclosure to provide an elevator system that can determine when a rope is deteriorating without requiring additional equipment. Another object of the present disclosure is to provide an inspection terminal that can determine that a rope has deteriorated without requiring additional equipment in the elevator system.

An elevator system according to the present disclosure includes a car that moves in a hoistway, a rope that suspends the car, a sheave around which the rope is wound, an electric motor that rotates the sheave, and a car that moves in a specific section of the hoistway. a first calculation means for calculating the amount of rotation of the sheave when moving; a storage means for storing a first reference value, a second reference value and a third reference value; a first reference value, a second reference value; and based on the third reference value, the diameter of the groove of the sheave, and the amount of rotation calculated by the first computing means, the diameter of the portion of the rope that is wound around the sheave when the cage moves in the above section A second calculating means for calculating, and a determining means for determining whether or not the rope is degraded based on the diameter calculated by the second calculating means. The first reference value is a reference value for the diameter of the groove of the sheave. The second reference value is a reference value for the diameter of the portion of the rope. The third reference value is a reference value for the amount of rotation of the sheave when the car moves through the section.

The elevator system according to the present disclosure includes a car that moves in a hoistway that includes a plurality of virtually divided sections, a rope that suspends the car, a sheave around which the rope is wound, and an electric motor that rotates the sheave. and a first calculating means for calculating the rotation amount of the sheave when the car moves through each of the plurality of sections, and the first reference value and the second reference value and the third reference value for each of the plurality of sections. storage means for storing, for each of a plurality of sections, the first reference value, the second reference value and the third reference value for the target section and the diameter of the groove portion of the sheave, and a second calculating means for calculating the diameter of the portion of the rope that is wound around the sheave when the car moves in the target section, based on the amount of rotation of the sheave when the car moves in the target section; and determination means for determining whether the rope is degraded based on the diameter calculated by the second calculation means. The first reference value is a reference value for the diameter of the groove of the sheave. The second reference value for each of the plurality of sections is a reference value for the diameter of the portion of the rope that is wrapped around the sheave as the car moves through each of the plurality of sections. The third reference value for each of the plurality of sections is a reference value for the amount of rotation of the sheave when the car moves in each of the plurality of sections.

An inspection terminal according to the present disclosure is an elevator apparatus that includes a car that moves in a hoistway, a rope that suspends the car, a sheave around which the rope is wound, and an electric motor that rotates the sheave. It is an inspection terminal for inspection. The inspection terminal comprises first computing means for computing the rotation amount of the sheave when the car moves in a specific section of the hoistway, and storage for storing the first reference value, the second reference value, and the third reference value. means, the first reference value, the second reference value, and the third reference value, the diameter of the groove portion of the sheave, and the amount of rotation calculated by the first calculation means, the cage of the rope moves through the above section. a second calculating means for calculating the diameter of the part that is wound around the sheave when moving; and a determining means for determining whether or not the rope is deteriorated based on the diameter calculated by the second calculating means. Prepare. The first reference value is a reference value for the diameter of the groove of the sheave. The second reference value is a reference value for the diameter of the portion of the rope. The third reference value is a reference value for the amount of rotation of the sheave when the car moves through the section.

The inspection terminal according to the present disclosure includes a car that moves in a hoistway that includes a plurality of virtually divided sections, a rope that suspends the car, a sheave around which the rope is wound, and an electric motor that rotates the sheave. and an inspection terminal for inspecting a rope in an elevator apparatus comprising: The inspection terminal comprises first computing means for computing the rotation amount of the sheave when the car moves through each of the plurality of sections, and the first reference value and the second and third reference values for each of the plurality of sections. a storage means for storing a first reference value for each of a plurality of sections, a second reference value and a third reference value for the target section, the diameter of the groove portion of the sheave, and the first calculation means A second calculation for calculating the diameter of the portion of the rope that is wound around the sheave when the car moves in the target section, based on the amount of rotation of the sheave when the car moves in the target section. means, and determination means for determining whether or not the rope is degraded based on the diameter calculated by the second calculation means. The first reference value is a reference value for the diameter of the groove of the sheave. The second reference value for each of the plurality of sections is a reference value for the diameter of the portion of the rope that is wrapped around the sheave as the car moves through each of the plurality of sections. The third reference value for each of the plurality of sections is a reference value for the amount of rotation of the sheave when the car moves in each of the plurality of sections.

For example, in the elevator system according to the present disclosure, the first computing means computes the rotation amount of the sheave when the car moves in a specific section of the hoistway. The second computing means calculates the rope cage based on the first, second and third reference values, the diameter of the groove portion of the sheave, and the amount of rotation computed by the first computing means. Calculate the diameter of the part that is wound around the sheave when moving in the above section. The determining means determines whether the rope is degraded based on the diameter calculated by the second calculating means. The system can determine when a rope is deteriorating without the need for additional equipment.

1 is a diagram showing an example of an elevator system according to Embodiment 1; FIG. It is a figure for demonstrating the function of a control apparatus. 4 is a flowchart showing an operation example of a control device; 4 is a flowchart showing an example of deterioration determination processing in S104; FIG. 4 is a diagram showing a state in which a rope is wound around a sheave. It is a figure which shows the example of a measurement of the diameter D. FIG. 10 is a diagram showing another measurement example of the diameter D; FIG. 4 is a diagram for explaining functions of a computing unit; It is a figure for demonstrating the function of a correction|amendment part. 5 is a flow chart showing an example of obtaining a diameter D; 8 is a flow chart showing another example of acquisition of diameter D; It is a figure which shows the example of the hardware resources of a control apparatus. FIG. 10 is a diagram showing another example of hardware resources of a control device;

A detailed description is given below with reference to the drawings. Duplicate descriptions are appropriately simplified or omitted. In each figure, the same reference numerals denote the same or corresponding parts.

Embodiment 1.
FIG. 1 is a diagram showing an example of an elevator system according to Embodiment 1. FIG. The elevator system shown in FIG. 1 includes an elevator device 1 . Elevator device 1 is connected to information center 3 via network 2 .

Network 2 is, for example, an IP network. An IP network is a communication network using IP (Internet Protocol) as a communication protocol. Network 2 may be a closed network or an open network. Information center 3 manages a large number of elevator devices. The elevator device 1 is an example of an elevator device managed by the information center 3 .

The elevator device 1 has a car 11 and a counterweight 12 . The car 11 moves up and down the hoistway 13 . The counterweight 12 moves up and down the hoistway 13 . Car 11 and counterweight 12 are suspended in hoistway 13 by ropes 14 . The rope 14 is, for example, a wire rope.

The hoist machine 15 comprises a sheave 16, an electric motor 17 and an encoder 18 (not shown in FIG. 1). A rope 14 is wound around a sheave 16 . The electric motor 17 rotates the sheave 16 . That is, the electric motor 17 drives the car 11 . The encoder 18 detects the rotation angle of the sheave 16 . The encoder 18 outputs a signal corresponding to the rotation angle from the reference. The encoder 18 is an example of a detector that detects the rotation angle of the sheave 16 . The hoist 15 is controlled by a control device 19 . The control device 19 can communicate with the information center 3 via the network 2 . The communication function of the control device 19 may be provided as a separate device in the elevator device 1 .

FIG. 1 shows an example in which a hoist 15 and a control device 19 are installed in a machine room 20 above the hoistway 13 . The hoist 15 and the control device 19 may be installed in the hoistway 13 . When the hoisting machine 15 and the control device 19 are installed in the hoistway 13, the hoisting machine 15 and the control device 19 may be installed at the top of the hoistway 13, or may be installed in the pit of the hoistway 13. Also good.

A weighing device 21 is provided in the car 11 . The scale device 21 measures the loaded load of the car 11 . FIG. 1 shows an example in which the scale device 21 is provided below the car 11 . A weighing device 21 may be provided at the end of the rope 14 .

A plate 22 is provided in the hoistway 13 . The plate 22 is arranged according to the height of each landing 23 where the car 11 stops. FIG. 1 shows two vertically adjacent landings 23, for example, the landing 23 on the nth floor and the landing 23 on the (n+1)th floor. In the following, when it is necessary to specify the hall individually, the hall on the nth floor is denoted by reference numeral 23-n. Similarly, when it is necessary to identify the plates individually, reference numeral 22-n is assigned to the plate arranged in line with the height of landing 23-n. For example, the plate 22-5 is arranged according to the height of the landing 23-5 on the fifth floor.

The car 11 is provided with a detector 24 for detecting the plate 22 . Detector 24 is, for example, a photoelectric sensor. FIG. 1 shows an example in which a car 11 is stopped at a landing 23 on a certain floor. The floor of the car 11 is arranged at the same height as the floor of the landing 23 of the floor. If the car 11 is arranged at the height shown in FIG. 1 , the detector 24 detects the plate 22 arranged according to the height of the landing 23 .

The speed governor 25 is a device for forcibly stopping the movement of the car 11 when the speed of the car 11 exceeds a specific speed. The speed governor 25 cuts off power to the hoisting machine 15 to electrically stop the car 11 when the speed of the car 11 exceeds a specific first speed. The speed governor 25 operates an emergency stop (not shown) to mechanically stop the car 11 when the speed of the car 11 exceeds a specific second speed. The second speed is a speed faster than the first speed.

The governor 25 includes a governor wheel 26, a governor rope 27, a connecting member 28, and an encoder 29 (not shown in FIG. 1).

In the example shown in FIG. 1 , the governor wheel 26 is rotatably provided in the machine room 20 . The governor wheel 26 may be provided at the top of the hoistway 13 . The control rope 27 is endless. A governor rope 27 is wound around a governor wheel 26 . The connecting member 28 is provided on the car 11 . The control rope 27 is connected to the car 11 via a connecting member 28 . When the car 11 moves, the control rope 27 moves. When the speed control rope 27 moves, the speed control wheel 26 rotates. The encoder 29 detects the rotation angle of the governor wheel 26 . The encoder 29 outputs a signal corresponding to the rotation angle from the reference.

FIG. 2 is a diagram for explaining the functions of the control device 19. As shown in FIG. As shown in FIG. 2 , the control device 19 includes a storage section 40 , a communication section 41 , an operation control section 42 , a calculation section 43 , an acquisition section 44 , a calculation section 45 and a determination section 46 .

The method of inspecting the rope 14 will now be described in detail, also with reference to FIGS. 3 to 7. FIG. FIG. 3 is a flowchart showing an operation example of the control device 19. As shown in FIG.

In the control device 19, it is determined whether or not a start signal for starting inspection of the rope 14 has been received (S101). For example, inspection of rope 14 is performed by elevator maintenance personnel. A maintenance worker carries a portable terminal 4 and visits a building provided with the elevator device 1. - 特許庁The mobile terminal 4 is, for example, a smart phone. A maintenance worker transmits a start signal from the mobile terminal 4 . As another example, the start signal may be sent from the operating panel 30 provided on the car 11 . The start signal may be sent from the information center 3 . When the communication unit 41 receives the start signal, it is determined as Yes in S101.

If determined as Yes in S<b>101 , the operation control unit 42 starts operation for inspecting the rope 14 . Specifically, the operation control unit 42 stops the car 11 at the landing 23 on the lowest floor (S102). An example in which the car 11 stops at each landing 23 on the 1st to 10th floors will be described below. That is, the lowest floor is the first floor. In S102, the operation control unit 42 stops the car 11 at a position where the detector 24 detects the plate 22-1.

Next, the operation control unit 42 moves the car 11 to the landing 23 on the top floor (S103). As mentioned above, the top floor is the tenth floor. In S103, the operation control unit 42 stops the car 11 at a position where the detector 24 detects the plate 22-10.

After the car 11 leaves the landing 23-1, the detector 24 detects the plate 22-2 when the car 11 passes through the landing 23-2. After that, when the car 11 passes through the landing 23-3, the detector 24 detects the plate 22-3. Similarly, detector 24 detects plate 22 each time car 11 passes landing 23 .

Then, when the car 11 stops at the landing 23-10 in S103, the process for determining the deterioration state of the rope 14 is started (S104). FIG. 4 is a flowchart showing an example of the deterioration determination process of S104. The deterioration determination process may be started immediately after the car 11 leaves the hall 23-1 in S102.

The hoistway 13 includes a plurality of virtually divided sections. These multiple sections are continuous in the vertical direction. The car 11 moves through the plurality of sections. For example, one section is between two vertically adjacent plates 22 . If the lowest floor is the 1st floor and the highest floor is the 10th floor, the hoistway 13 has nine sections. Hereinafter, the section from plate 22-n to plate 22-(n+1) is denoted as section n.

FIG. 4 shows an example in which a series of processes shown from S202 to S208 are performed for each section. First, n=1 is set in S201. The calculation unit 43 calculates an amount Δθn by which the sheave 16 rotates when the car 11 moves through the section n. For example, when the car 11 travels through section 1, the detector 24 detects plate 22-1 at the starting point of section 1. FIG. The encoder 18 detects the rotation angle θ1 of the sheave 16 when the detector 24 detects the plate 22-1. The calculation unit 43 acquires the rotation angle θ1 detected by the encoder 18 (S202).

Similarly, when car 11 travels through section 1, detector 24 detects plate 22-2 at the end of section 1. FIG. The encoder 18 detects the rotation angle θ2 of the sheave 16 when the detector 24 detects the plate 22-2. The calculation unit 43 acquires the rotation angle θ2 detected by the encoder 18 (S203). Based on the rotation angle θ1 obtained in S202 and the rotation angle θ2 obtained in S203, the calculation unit 43 calculates the rotation amount Δθ1 of the sheave 16 when the car 11 moves in section 1 (S204).

The obtaining unit 44 obtains the diameter D of the groove of the sheave 16 (S205). Note that the midpoint of the diameter D is the point on the rotation axis of the sheave 16 . As an example, the diameter D is actually measured by maintenance personnel. The maintenance worker inputs the measured value of the diameter D from the portable terminal 4 and transmits it to the control device 19 . The acquisition unit 44 acquires the value received from the mobile terminal 4 by the communication unit 41 as the diameter D. FIG.

FIG. 5 is a diagram showing a state in which the rope 14 is wound around the sheave 16. As shown in FIG. In the example shown in FIG. 5, rope 14 does not contact the bottom of the groove formed in sheave 16 . In such a case, diameter D is the diameter of what is considered the bottom of the groove. Further, as shown in FIG. 5, the effective diameter of the sheave 16 is represented by D+d/2+d/2=D+d, where d is the diameter of the rope 14 .

FIG. 6 is a diagram showing an example of measuring the diameter D. FIG. FIG. 6 shows an example in which the detector 31 is pressed against a portion of the groove formed in the sheave 16 where the rope 14 is not wound. In the example shown in FIG. 6, the diameter D is measured based on the distance L1 between the reference plane and the tip of the detector 31. In the example shown in FIG. FIG. 7 is a diagram showing another measurement example of the diameter D. FIG. FIG. 7 shows an example of measuring the protrusion amount L2 of the rope 14 from the reference plane and deriving the diameter D. As shown in FIG.

After the acquisition unit 44 acquires the diameter D, the calculation unit 45 calculates the diameter dn of the rope 14 (S206). A diameter dn is the diameter of a portion of the rope 14 that is wound around the sheave 16 when the car 11 moves through the section n. The computing unit 45 computes the diameter dn using the following equation.

In equation (1), D′ is a reference value for the diameter D of the groove of the sheave 16 . The reference value D′ is pre-stored in the storage unit 40 . In Equation (1), Δθ'n is a reference value for the amount of rotation Δθn of the sheave 16 when the car 11 moves in the section n. The reference value Δθ′n is pre-stored in the storage unit 40 . Regarding the reference value Δθ′n, the value for each section is stored in the storage unit 40 . That is, the storage unit 40 stores the reference value Δθ′1 for the interval 1, the reference value Δθ′2 for the interval 2, the reference value Δθ′3 for the interval 3, . . . , and the reference value Δθ′9 for the interval 9. be done.

In equation (1), d'n is a reference value for the diameter dn of the portion of the rope 14 that is wound around the sheave 16 when the car 11 moves in the section n. The reference value d′n is pre-stored in the storage unit 40 . As for the reference value d′n, the value for each section is stored in the storage unit 40 . That is, the storage unit 40 stores a reference value d'1 for section 1, a reference value d'2 for section 2, a reference value d'3 for section 3, . . . , and a reference value d'9 for section 9. be done.

As an example, each value measured when the elevator device 1 is installed is stored in the storage unit 40 as a reference value D', a reference value Δθ'n, and a reference value d'n. The reference value D' and the reference value d'n may be design values. After that, the reference value D′, the reference value Δθ′n, and the reference value d′n may be updated based on each value measured when the elevator device 1 is repaired.

The effective diameter of the sheave 16 when the car 11 is moving in the section n is D+dn. Therefore, the amount of movement of the car 11 is represented by π(D+dn)×Δθn. When the elevator device 1 is installed and when the rope 14 is inspected, the distance of the section n, that is, the amount of movement of the car 11 does not change. Therefore, the following formula holds. Equation (1) is derived from the following equation.

As shown in the formula (1), in S206, the calculation unit 45 calculates the reference value D′, the reference value Δθ′1, and the reference value d′1 stored in the storage unit 40, and the rotation amount calculated in S204. A diameter d1 is calculated based on Δθ1 and the diameter D acquired in S205.

Next, the determination unit 46 determines whether the rope 14 has deteriorated based on the diameter dn calculated by the calculation unit 45 (S207). For example, the storage unit 40 stores a threshold value ThA for determining deterioration. The determination unit 46 compares the diameter d1 calculated in S206 with the threshold value ThA. The determination unit 46 determines that the rope 14 has deteriorated if the diameter d1 calculated in S206 is smaller than the threshold value ThA. If the diameter d1 calculated in S206 is greater than the threshold value ThA, the determination unit 46 does not determine that the rope 14 has deteriorated.

When the deterioration determination of the rope 14 is performed in S207, the inspection result regarding the section n is stored in the storage unit 40 (S208). As an example, the inspection result includes information on the diameter d1 calculated in S206. As another example, the inspection result includes the determination result in S207.

When a series of processes for a certain section ends, it is determined whether or not the series of processes has been performed for all sections (S209). If it is determined as No in S209, 1 is added to n (S210). For example, the value of n is 2. As a result, the series of processes described above is started for section 2 .

That is, in S202, the rotation angle θ2 of the sheave 16 when the detector 24 detects the plate 22-2 is obtained. In S203, the rotation angle θ3 of the sheave 16 when the detector 24 detects the plate 22-3 is acquired. In S<b>204 , the calculation unit 43 calculates the amount of rotation Δθ2 of the sheave 16 when the car 11 moves in the section 2 .

Further, in S206, the calculation unit 45 calculates a , the diameter d2. In S<b>207 , the determination unit 46 determines whether the rope 14 has deteriorated based on the diameter d<b>2 calculated by the calculation unit 45 . For example, the determination unit 46 determines that the rope 14 has deteriorated if the diameter d2 calculated in S206 is smaller than the threshold value ThA. At S<b>208 , the inspection result for section 2 is stored in the storage unit 40 .

Then, calculation of the amount of rotation Δθn, calculation of the diameter dn, determination of deterioration of the rope 14, and recording of inspection results are performed for each of the plurality of virtually divided sections. The above series of processes are performed for all sections, and the deterioration determination process ends when the determination in S209 is Yes.

In the example shown in this embodiment, deterioration of the rope 14 can be determined without requiring additional equipment in the elevator apparatus 1 . Therefore, this elevator system is particularly easy to apply to the existing elevator apparatus 1 .

The more times the rope 14 is bent, the faster it deteriorates. Therefore, deterioration of the rope 14 does not progress uniformly over the entire length. In the example shown in the present embodiment, deterioration of the rope 14 can be determined for each preset section. Therefore, it is possible to easily identify a portion of the rope 14 where deterioration progresses quickly.

In this elevator system, the following operations may be performed after the determination in S209 is Yes.

For example, if it is determined in S207 that the rope 14 is degraded in at least one section, the operation control unit 42 may stop the operation of the car 11 thereafter.

As another example, the elevator system may have the ability to report inspection results. For example, when the communication unit 41 receives the start signal from the mobile terminal 4 in S<b>101 , the communication unit 41 transmits the inspection result to the mobile terminal 4 . As a result, the inspection result is displayed on the display 4a of the mobile terminal 4. FIG. When the communication unit 41 receives the start signal from the operation panel 30 in S<b>101 , the communication unit 41 may transmit the inspection result to the operation panel 30 . As a result, the inspection result is displayed on the display 30a of the operation panel 30. FIG. When the communication unit 41 receives the start signal from the information center 3 via the network 2 , the communication unit 41 may transmit the inspection result to the information center 3 . As a result, the inspection result is displayed on the display 3a provided in the information center 3. FIG.

The test results transmitted by the communication unit 41 may include only the test results of some sections. For example, by transmitting the inspection result, the communication unit 41 causes the display 4a, 3a, or 30a to display the determination result of the determination unit 46 for the portion of the rope 14 having the smallest diameter dn calculated in S206. Also good.

Other features that the elevator system can employ are described below. The elevator system may employ a combination of the following functions.

The control device 19 may further include a computing section 47 . As described above, the diameter dn calculated in S206 is stored in the storage unit 40 in S208. The storage unit 40 accumulates the diameter dn each time an inspection is performed. When the diameter dn is calculated in S206, the calculation unit 47 calculates the time rate of change of the diameter dn based on the diameter dn calculated this time and the diameter dn calculated in the past. For example, if n=1, when the diameter d1 is calculated in S206, the calculation unit 47 calculates the time rate of change of the diameter d1 based on the diameter d1 calculated this time and the diameter d1 calculated last time. do. If n=2, when the diameter d2 is calculated in S206, the calculation unit 47 calculates the time rate of change of the diameter d2 based on the diameter d2 calculated this time and the diameter d2 calculated last time. Similarly, the computing unit 47 computes the time rate of change of the diameter dn for each of the plurality of sections.

FIG. 8 is a diagram for explaining the function of the calculation unit 47. As shown in FIG. FIG. 8 shows the change in the diameter of the rope 14 over time. As shown in FIG. 8, during the period P1 immediately after the use of the rope 14 is started, the initial elongation of the rope 14 occurs, so the time rate of change of the diameter of the rope 14 increases. In a period P2 after the period P1, the time rate of change of the diameter of the rope 14 becomes smaller than the time rate of change in the period P1. Then, in a period P3 after the period P2 has passed, the time rate of change of the diameter of the rope 14 increases again.

The determination unit 46 may determine whether the rope 14 is degraded based on the time rate of change calculated by the calculation unit 47 . For example, the determination unit 46 determines that the rope 14 has deteriorated if the time change rate calculated by the calculation unit 47 is greater than a specific threshold value ThB. In order to prevent determination that the rope 14 is deteriorated during the period P1, the determination unit 46 may perform deterioration determination based on the time rate of change of the diameter only when the rope 14 has been used for a certain period of time or longer. good.

The determination unit 46 may determine that the rope 14 has deteriorated when the diameter dn calculated in S206 is smaller than the threshold ThC and the time change rate calculated by the calculation unit 47 is larger than the threshold ThB. The threshold ThC is a value greater than the threshold ThA. Note that even when the control device 19 includes the calculation unit 47, the determination unit 46 determines that the rope 14 is deteriorated if the diameter dn calculated in S206 is smaller than the threshold value ThA.

In the present embodiment, an example of moving the car 11 from the landing 23 on the lowest floor to the landing 23 on the top floor for inspection of the rope 14 has been described. This is an example. The operation control unit 42 may move the car 11 from the landing 23 on the top floor to the landing 23 on the lowest floor for inspection of the rope 14 . The operation control unit 42 may move the car 11 only a part of the plurality of sections for inspection of the rope 14 . For example, the car 11 may be moved from the landing 23-5 to the landing 23-6, and the rope 14 may be inspected only for the section 5. FIG.

In the present embodiment, an example has been described in which the calculation unit 43 calculates the amount of rotation Δθn of the sheave 16 when the car 11 moves upward. This is a good example. In the example shown in this embodiment, the cage 11 and the counterweight 12 are suspended by ropes 14 . The tension of the part of the rope 14 extending from the sheave 16 to the car 11 side and the tension of the part extending to the counterweight 12 side cannot be the same unless the weight of the car 11 and the weight of the counterweight 12 are the same. If there is a difference between the two tensions, the portion of the rope 14 that is sent out from the sheave 16 will expand and contract due to the difference.

In the example shown in this embodiment, the position of car 11 is detected by detector 24 provided in car 11 . Therefore, when the car 11 moves downward, the detector 24 is affected by the expansion and contraction. By calculating the rotation amount Δθn based on the rotation angle θn detected when the car 11 moves upward, the rotation amount Δθn can be calculated without being affected by the expansion and contraction.

In this embodiment, an example in which plate 22 and detector 24 are provided as means for detecting the position of car 11 has been described. As such means, a detector for continuously detecting the absolute position of the car 11 may be provided. As another example, the speed governor 25 may be employed as the means. In such a case, the control device 19 is further provided with an arithmetic unit 48 . The calculation unit 48 calculates the position of the car 11 based on the rotation angle of the governor wheel 26 detected by the encoder 29 . In any example, each of the plurality of sections is specified based on the position detected by the means.

The elevator device 1 may further include a thermo-hygrometer 32 . In such a case, the control device 19 further includes a correction section 49 . A thermohygrometer 32 measures the temperature and humidity of the hoistway 13 . The correction unit 49 corrects the diameter dn calculated by the calculation unit 45 in S206 based on the temperature and humidity measured by the thermohygrometer 32 . Based on the diameter dn corrected by the correction unit 49, the determination unit 46 determines in S207 whether the rope 14 has deteriorated.

FIG. 9 is a diagram for explaining the function of the correction unit 49. As shown in FIG. The solid line shown in FIG. 9 is the same as the solid line shown in FIG. The dashed line shown in FIG. 9 indicates the time change of the diameter of the rope 14 when temperature and humidity are considered. Fibers such as hemp provided at the center of the rope 14 absorb moisture. Therefore, the diameter of the rope 14 increases as the humidity increases. Also, the steel wires included in the rope 14 expand when the temperature rises. Therefore, the diameter of the rope 14 tends to increase as the temperature and humidity increase, and decrease as the temperature and humidity decrease. The correction unit 49 corrects the diameter dn calculated by the calculation unit 45 according to this tendency. By including the correction unit 49 in the control device 19, it is possible to determine deterioration in consideration of temperature and humidity. Therefore, it is possible to further improve the determination accuracy.

In the present embodiment, an example has been described in which the rope 14 is inspected when the elevator apparatus 1 is not normally in service. This is a good example. Inspection of rope 14 may be performed during normal service hours. In such a case, the control device 19 further includes a detection section 50 .

In the normal service, driving is performed to carry passengers to their destination floors. As an example, consider the case where the car 11 stops at the hall 23-1 in S102 and moves to the hall 23-10 in S103 in response to the call registered by the passenger. When the car 11 stops at the landing 23-1 in S102, the door 33 of the car 11 opens. At this time, the load W1 of the car 11 before the door 33 is opened is measured by the weighing device 21 . After that, when the door 33 is closed, the load W2 of the car 11 after the door 33 is closed is measured by the scale device 21 . The detector 50 detects the difference between the load W1 and the load W2.

When the passenger gets off the car 11 at the landing 23-1, the load on the car 11 changes. Similarly, when a passenger gets on the car 11 at the landing 23-1, the load on the car 11 changes. Since the car 11 is suspended by the rope 14, the position of the car 11 changes when the load of the car 11 changes. For this reason, the calculation unit 43 does not need to calculate the rotation amount Δθn when the difference detected by the detection unit 50 exceeds the specific threshold value ThD. That is, when the difference detected by the detection unit 50 exceeds the threshold ThD, the deterioration determination of the rope 14 is not performed. Note that the threshold ThD is stored in the storage unit 40 in advance.

As another example, the control device 19 may further include a correction section 51 in addition to the detection section 50 . As described above, the detector 50 detects the difference between the load W1 and the load W2. The correction unit 51 corrects the rotation amount Δθn calculated by the calculation unit 43 according to the difference detected by the detection unit 50 . For example, when the car 11 moves upward, if the load W1 is greater than the load W2, the correction unit 51 calculates the rotation amount calculated by the calculation unit 43 as a correction value corresponding to the difference detected by the detection unit 50. Add to Δθn. When the car 11 moves upward, if the load W2 is greater than the load W1, the correction unit 51 calculates a correction value corresponding to the difference detected by the detection unit 50 from the amount of rotation Δθn calculated by the calculation unit 43. Subtract.

Further, after the deterioration determination process is finished, the operation control unit 42 may perform an operation to stop the car 11 at a specific confirmation position. The confirmation position is a position for maintenance personnel to visually confirm a specific portion of the rope 14 from above the car 11 . For example, if the hoist 15 is arranged at the top of the hoistway 13 , maintenance personnel may not be able to see the portion of the rope 14 that is wound around the sheave 16 . In such a case, the maintenance worker transmits, for example, a confirmation signal for starting the operation from the mobile terminal 4 .

As an example, consider a case where it is determined in S207 that the rope 14 is degraded when n=3 in the degradation determination process. In this case, when the communication unit 41 receives the confirmation signal, the operation control unit 42 makes the portion of the rope 14 that is wound around the sheave 16 when the car 11 moves in the section 3 visible from above the car 11. , causes the car 11 to stop. The operation control unit 42 may stop the car 11 so that the portion of the rope 14 having the smallest diameter dn calculated by the calculation unit 45 can be seen from above the car 11 . This allows maintenance personnel to easily check the deterioration state of the rope 14 . The confirmation position may be a position for visually recognizing a specific portion of the rope 14 from the pit of the hoistway 13 .

In the present embodiment, an example has been described in which the acquisition unit 44 acquires the diameter D as a value actually measured by maintenance personnel. The acquisition unit 44 may acquire a value other than the actual measurement value as the diameter D by maintenance personnel. As an example, a specific out-of-service section is set above the stop position of the car 11 on the top floor or below the stop position of the car 11 on the bottom floor. The out-of-service section is a section in which the car 11 does not move in the normal service.

FIG. 10 is a flow chart showing an example of obtaining the diameter D. FIG. The operation control unit 42 causes the car 11 to move to the out-of-service section (S301). In the following description, the out-of-service section is expressed as section 0 (n=0). Next, the computing unit 43 computes the amount of rotation Δθ0 of the sheave 16 when the car 11 moves through the non-service section (S302). Any method may be used to detect the position of the car 11 .

Next, the acquiring unit 44 acquires the diameter D of the groove of the sheave 16 by the following equation (S303). Equation (3) is derived from Equation (2) as well as Equation (1)

As noted above, D' is a reference value for the diameter D of the groove of sheave 16 . In Equation (3), Δθ′0 is a reference value for the amount of rotation Δθ0 of the sheave 16 when the car 11 moves in the non-service section. The reference value Δθ′0 is pre-stored in the storage unit 40 . In Equation (3), d'0 is a reference value for the diameter d0 of the portion of the rope 14 that is wound around the sheave 16 when the car 11 moves in the out-of-service section. The reference value d′0 is pre-stored in the storage unit 40 .

As described above, in normal service, the car 11 does not move in the out-of-service section. Therefore, the portion of the rope 14 that is wound around the sheave 16 when the car 11 moves in the non-service section is hardly degraded compared to other portions. Therefore, the acquisition unit 44 sets d0=d'0 in the equation (3). That is, in S303, the acquisition unit 44 obtains the diameter based on the reference value D′, the reference value Δθ′0, and the reference value d′0 stored in the storage unit 40 and the rotation amount Δθ0 calculated in S302. Compute D. Based on the diameter D obtained by the obtaining unit 44, the calculation unit 45 calculates the diameter dn of the rope 14 in S206.

FIG. 11 is a flow chart showing another example of obtaining the diameter D. FIG. In the example shown in FIG. 11 , the control device 19 further includes a calculation section 52 and a specification section 53 . As described above, when the determination in S101 is Yes, the car 11 moves from the landing 23-1 on the lowest floor to the landing 23-10 on the highest floor. When the car 11 stops at the landing 23-10, first, n is set to 1 in S401. Similar to S204, the computing unit 43 computes the amount of rotation Δθn of the sheave 16 when the car 11 moves in the section n (S402). If n=1, the calculation unit 43 calculates the rotation amount Δθ1.

Next, the calculation unit 52 calculates the rate of increase of the amount of rotation Δθn calculated in S401 from the reference value Δθ'n (S403). If n=1, the calculation unit 52 calculates the rate of increase of the rotation amount Δθ1 from the reference value Δθ′1 in S403. When the increase rate has been calculated for a certain section, it is determined whether or not the increase rate has been calculated for all sections (S404). If it is determined as No in S404, 1 is added to n (S405). For example, the value of n is 2. As a result, the rate of increase of the rotation amount Δθ2 from the reference value Δθ′2 is calculated in S403. Then, an increase rate is calculated in S403 for each of the plurality of sections.

If it is determined as Yes in S404, the identifying unit 53 identifies the section with the smallest increase rate calculated in S403 from among the plurality of sections as the reference section (S406). In the following description, the reference section specified by the specifying unit 53 is denoted as section m (n=m). After the reference section is specified by the specifying unit 53, the acquiring unit 44 acquires the diameter D of the groove of the sheave 16 by the following equation (S407). Equation (4) is derived from Equation (2) as well as Equation (3).

In Equation (4), Δθ′m is a reference value for the amount of rotation Δθm of the sheave 16 when the car 11 moves in the reference section. In equation (4), d'm is a reference value for the diameter dm of the portion of the rope 14 that is wound around the sheave 16 when the car 11 moves in the reference section.

The portion of the rope 14 that is wound around the sheave 16 when the car 11 moves in the reference section is the portion that has undergone the least deterioration. Therefore, the acquisition unit 44 sets dm=d'm in Equation (4). That is, FIG. 11 shows an example of obtaining the diameter D of the groove portion of the sheave 16 by using the portion of the rope 14 where deterioration has progressed the least. In S407, the acquisition unit 44 obtains the diameter based on the reference value D′, the reference value Δθ′m, and the reference value d′m stored in the storage unit 40 and the rotation amount Δθm calculated by the calculation unit 43. Compute D. Based on the diameter D obtained by the obtaining unit 44, the calculation unit 45 calculates the diameter dn of the rope 14 in S206.

As another example, the obtaining unit 44 may calculate the wear amount of the groove portion of the sheave 16 based on the cumulative number of rotations of the sheave 16 and obtain the diameter D from the calculation result. The accumulated number of revolutions of the sheave 16 from the time of installation or repair of the elevator device 1 is stored in the storage unit 40 . The acquiring unit 44 may consider the tension of the rope 14, the shape of the groove, and the like when calculating the wear amount of the groove of the sheave 16 .

In addition, when a value other than the actual measurement value by maintenance personnel is adopted as the diameter D, when it is determined in S207 that the rope 14 is deteriorated in all of the plurality of sections, the determination unit 46 It may be determined that the wear of the groove portion of the wheel 16 is progressing.

In this embodiment, an example in which the control device 19 of the elevator device 1 has the function of inspecting the rope 14 has been described. The rope 14 inspection function may be provided in another inspection terminal. For example, the units indicated by reference numerals 40 to 53 may be provided in the mobile terminal 4. FIG. Each unit indicated by reference numerals 40 to 53 may be provided in a server (not shown) of the information center 3. FIG.

In the present embodiment, each part indicated by reference numerals 40 to 53 indicates the function of the control device 19. FIG. FIG. 12 is a diagram showing an example of hardware resources of the control device 19. As shown in FIG. The control device 19 includes, as hardware resources, a processing circuit 60 including a processor 61 and a memory 62, for example. A function of the storage unit 40 is realized by the memory 62 . A semiconductor memory or the like can be used as the memory 62 . The control device 19 implements the functions of the respective units indicated by reference numerals 41 to 53 by causing the processor 61 to execute programs stored in the memory 62 .

FIG. 13 is a diagram showing another example of hardware resources of the control device 19. As shown in FIG. In the example shown in FIG. 13, controller 19 comprises processing circuitry 60 including, for example, processor 61 , memory 62 and dedicated hardware 63 . FIG. 13 shows an example in which a part of the functions of the control device 19 are implemented by dedicated hardware 63 . All the functions of the control device 19 may be realized by dedicated hardware 63 . Dedicated hardware 63 can be a single circuit, multiple circuits, programmed processors, parallel programmed processors, ASICs, FPGAs, or combinations thereof.

The hardware resources of the inspection device are the same as the example shown in FIG. 12 or 13 . For example, the inspection apparatus includes, as hardware resources, a processing circuit including a processor and a memory. The inspection apparatus realizes the functions of the respective units indicated by reference numerals 41 to 53 by executing the programs stored in the memory by the processor. As hardware resources, the inspection apparatus may include processing circuitry including a processor, memory, and dedicated hardware. A part or all of the functions of the inspection device may be realized by dedicated hardware.

Elevator systems according to the present disclosure are applicable to systems in which the car is suspended by ropes.

1 elevator device 2 network 3 information center 3a indicator 4 portable terminal 4a indicator 11 car 12 counterweight 13 hoistway 14 rope 15 hoisting machine 16 sheave 17 electric motor 18 Encoder 19 Control device 20 Machine room 21 Scale device 22 Plate 23 Platform 24 Detector 25 Governor 26 Governor 27 Governor rope 28 Connecting member 29 Encoder 30 Operation panel 30a indicator, 31 detector, 32 thermo-hygrometer, 33 door, 40 storage unit, 41 communication unit, 42 operation control unit, 43 calculation unit, 44 acquisition unit, 45 calculation unit, 46 determination unit, 47 calculation unit, 48 Calculation unit 49 correction unit 50 detection unit 51 correction unit 52 calculation unit 53 identification unit 60 processing circuit 61 processor 62 memory 63 dedicated hardware

Claims (23)

A car traveling in a hoistway,
a rope for suspending the basket;
a sheave around which the rope is wound;
an electric motor for rotating the sheave;
a first computing means for computing an amount of rotation of the sheave when the car moves in a specific section of the hoistway;
storage means for storing a first reference value, a second reference value, and a third reference value;
Based on the first reference value, the second reference value, the third reference value, the diameter of the groove portion of the sheave, and the amount of rotation calculated by the first calculation means, the cage of the rope is calculated. a second calculating means for calculating the diameter of the portion that is wound around the sheave when moving through the section;
determination means for determining whether the rope is degraded based on the diameter calculated by the second calculation means;
with
The first reference value is a reference value for the diameter of the groove of the sheave,
the second reference value is a reference value for the diameter of the portion of the rope;
The elevator system, wherein the third reference value is a reference value for the amount of rotation of the sheave when the car moves in the section. Further comprising a third computing means for computing the time rate of change of the diameter computed by the second computing means,
2. The elevator system according to claim 1, wherein said determination means determines whether said rope is degraded based on the time rate of change calculated by said third calculation means. Further comprising a detection means for detecting the position of the car,
3. The elevator system according to claim 1, wherein said section is specified based on the position detected by said detection means. A car that moves through a hoistway that includes a plurality of virtually divided sections,
a rope for suspending the basket;
a sheave around which the rope is wound;
an electric motor for rotating the sheave;
a first calculation means for calculating the amount of rotation of the sheave when the car moves through each of the plurality of sections;
storage means for storing a first reference value and a second reference value and a third reference value for each of the plurality of intervals;
For each of the plurality of sections, the first reference value, the second reference value and the third reference value for the target section, the diameter of the groove portion of the sheave, and the and calculating the diameter of the portion of the rope that is wound around the sheave when the car moves in the target section, based on the amount of rotation of the sheave when the car moves in the target section. a second computing means;
determination means for determining whether the rope is degraded based on the diameter calculated by the second calculation means;
with
The first reference value is a reference value for the diameter of the groove of the sheave,
The second reference value for each of the plurality of sections is a reference value for the diameter of a portion of the rope that is wound around the sheave when the car moves in each of the plurality of sections,
The elevator system, wherein the third reference value for each of the plurality of sections is a reference value for the amount of rotation of the sheave when the car moves in each of the plurality of sections. Further comprising a third computing means for computing the time rate of change of the diameter computed by the second computing means for each of the plurality of sections,
5. The elevator system according to claim 4, wherein said determining means determines whether said rope is degraded based on the time change rate calculated by said third calculating means. Further comprising a detection means for detecting the position of the car,
6. The elevator system according to claim 4, wherein each of said plurality of sections is specified based on the position detected by said detection means. 7. The apparatus according to any one of claims 4 to 6, further comprising a display for displaying the judgment result of said judging means for the portion of said rope having the smallest diameter calculated by said second calculating means. elevator system. further comprising acquisition means;
The first computing means computes the amount of rotation of the sheave when the car moves in a specific out-of-service section,
The storage means stores a second reference value and a third reference value for the out-of-service section,
The obtaining means obtains the first reference value, the second reference value and the third reference value for the out-of-service section, and the time when the car travels in the out-of-service section calculated by the first calculating means. obtaining the diameter of the groove of the sheave based on the amount of rotation of the sheave of
8. The elevator system according to any one of claims 4 to 7, wherein the out-of-service section is above the stop position on the top floor or below the stop position on the bottom floor. fourth computing means for computing an increase rate from the third reference value of the amount of rotation computed by the first computing means for each of the plurality of intervals;
a specifying means for specifying, as a reference section, a section having the smallest increase rate calculated by the fourth calculating means from among the plurality of sections;
The amount of rotation of the sheave when the car moves through the reference section, which is calculated by the first calculating means using the first reference value, the second reference value and the third reference value for the reference section. an acquisition means for acquiring the diameter of the groove of the sheave based on
8. An elevator system according to any one of claims 4 to 7, further comprising: 8. The apparatus according to any one of claims 1 to 7, further comprising acquisition means for calculating the amount of wear of the groove of the sheave based on the cumulative number of rotations of the sheave and acquiring the diameter of the groove of the sheave. The elevator system as described in . 11. The elevator system according to any one of claims 1 to 10, wherein said first computing means computes the amount of rotation of said sheave when said car moves upward. Further comprising a weighing device for measuring the load of the car,
The first computing means determines if the difference between the payload measured by the weighing device before the door of the car is opened and the payload measured by the weighing device after the door is closed exceeds a specific threshold. 12. The elevator system according to any one of claims 1 to 11, wherein even if the car moves after the door is closed, the amount of rotation of the sheave is not calculated. a weighing device for measuring the load of the car;
detection means for detecting the difference between the payload measured by the weighing device before the car door is opened and the payload measured by the weighing device after the door is closed;
a first correcting means for correcting the amount of rotation calculated by the first calculating means according to the difference detected by the detecting means;
12. An elevator system according to any preceding claim, further comprising: a thermohygrometer for measuring the temperature and humidity of the hoistway;
a second correcting means for correcting the diameter calculated by the second calculating means based on the temperature and humidity measured by the thermohygrometer;
14. An elevator system according to any preceding claim, further comprising: The detection means is
A plate arranged according to the height of the landing where the car stops;
a detector provided in the cage for detecting the plate;
The elevator system according to claim 3 or claim 6, comprising: 7. An elevator system according to claim 3 or 6, wherein said detection means comprises a detector for continuously detecting the absolute position of said car. The detection means is
a speed control rope connected to the car;
a governor wheel around which the governor rope is wound;
an encoder that detects the rotation angle of the governor wheel;
fifth computing means for computing the position of the car based on the rotation angle detected by the encoder;
The elevator system according to claim 3 or claim 6, comprising: Further comprising operation control means for stopping the car at a specific confirmation position when the determination means determines that the rope is degraded,
4. The elevator system according to any one of claims 1 to 3, wherein the confirmation position is set in advance as a position for visually recognizing the portion of the rope from the pit of the hoistway or from above the car. Further comprising an operation control means for stopping the car at a specific confirmation position,
The confirmation position is set in advance as a position for visually recognizing the portion of the rope having the smallest diameter calculated by the second calculation means from the pit of the hoistway or above the car. Item 7. The elevator system according to any one of Item 6. 18. The elevator system according to any one of claims 1 to 17, further comprising operation control means for suspending operation of the car when the determination means determines that the rope is deteriorated. operation control means for moving the car and causing the first calculation means to calculate the amount of rotation of the sheave when a specific start signal is received from the information center via the network;
a communication means for transmitting the determination result by the determination means to the information center;
18. An elevator system according to any preceding claim, further comprising: A car traveling in a hoistway,
a rope for suspending the basket;
a sheave around which the rope is wound;
an electric motor for rotating the sheave;
, an inspection terminal for inspecting the rope,
a first computing means for computing an amount of rotation of the sheave when the car moves in a specific section of the hoistway;
storage means for storing a first reference value, a second reference value, and a third reference value;
Based on the first reference value, the second reference value, the third reference value, the diameter of the groove portion of the sheave, and the amount of rotation calculated by the first calculation means, the cage of the rope is calculated. a second calculating means for calculating the diameter of the portion that is wound around the sheave when moving through the section;
determination means for determining whether the rope is degraded based on the diameter calculated by the second calculation means;
with
The first reference value is a reference value for the diameter of the groove of the sheave,
the second reference value is a reference value for the diameter of the portion of the rope;
The inspection terminal, wherein the third reference value is a reference value for the amount of rotation of the sheave when the car moves in the section. A car that moves through a hoistway that includes a plurality of virtually divided sections,
a rope for suspending the basket;
a sheave around which the rope is wound;
an electric motor for rotating the sheave;
, an inspection terminal for inspecting the rope,
a first calculation means for calculating the amount of rotation of the sheave when the car moves through each of the plurality of sections;
storage means for storing a first reference value and a second reference value and a third reference value for each of the plurality of intervals;
For each of the plurality of sections, the first reference value, the second reference value and the third reference value for the target section, the diameter of the groove portion of the sheave, and the and calculating the diameter of the portion of the rope that is wound around the sheave when the car moves in the target section, based on the amount of rotation of the sheave when the car moves in the target section. a second computing means;
determination means for determining whether the rope is degraded based on the diameter calculated by the second calculation means;
with
The first reference value is a reference value for the diameter of the groove of the sheave,
The second reference value for each of the plurality of sections is a reference value for the diameter of a portion of the rope that is wound around the sheave when the car moves in each of the plurality of sections,
The inspection terminal, wherein the third reference value for each of the plurality of sections is a reference value for the amount of rotation of the sheave when the car moves in each of the plurality of sections.

Images