JP2011032075A - Elevator device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To quickly and accurately detect the degradation of friction force between a driving pulley and a main cable before affecting the operation of an elevator. <P>SOLUTION: This elevator device includes a passenger car 1, a counterweight 2, the main cable 3 for tying the passenger car 1 to the counterweight 2, the driving pulley 4 for driving the main cable 3, a hoisting machine 5 for driving the driving pulley 4, an elevator control device 21 for controlling the hoisting machine 5 to be rotated, and a slip detecting means 15 for detecting a slip amount between the driving pulley 4 ad the main cable 3. The elevator control device 21 controls the hoisting machine 5 to be rotated in accordance with a preset normal speed pattern during normal operation, and controls the hoisting machine 5 to be rotated in accordance with an elevator diagnosing speed pattern in which a value for the accelerating/decelerating speed of the driving pulley 4 is greater than in the normal speed pattern, during elevator diagnosis, so that the slip detecting means 15 detects the slip amount and diagnoses the existence of degradation of friction force between the driving pulley 4 and the main cable 3 in accordance with the detected slip amount. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an elevator apparatus.

  The conventional elevator apparatus has detected the slip between a drive pulley and a main policy by comparing the speed of a drive pulley and the speed of a main rope (rope) (for example, refer patent document 1).

International Publication No. 2005/115902 Pamphlet

  However, in the case of detecting the occurrence of slippage between the drive pulley and the main rope by running the elevator like a normal operation service and detecting the occurrence of slippage between the drive pulley and the main rope as in the conventional elevator device, Even if the frictional force between the driving pulley and the main rope, that is, the traction ability decreases due to various factors such as the above, it is impossible to detect the decrease until it reaches a state that affects the normal service. There was a problem.

  The present invention has been made to solve such a problem, and is to detect quickly and reliably before a decrease in the frictional force between the driving pulley and the main rope affects the operation of the elevator. The object is to obtain an elevator device that makes possible.

  The present invention includes a car cage, a counterweight, a main rope that connects the car and the counterweight, a driving pulley that drives the main rope, a hoisting machine that drives the driving pulley, and the hoisting An elevator control device that controls the rotation of the machine, and a slip detection means that detects a slip amount between the drive pulley and the main rope, and the elevator control device has a normal The hoisting machine is rotationally controlled based on a speed pattern, and at the time of elevator diagnosis, the hoisting machine is accelerated and decelerated based on the speed pattern for elevator diagnosis in which the acceleration and deceleration of the driving pulley are larger than those of the normal speed pattern. Rotating the upper machine, detecting the slip amount by the slip detection means, and diagnosing the presence or absence of a decrease in frictional force between the drive pulley and the main rope based on the detected slip amount. Characteristic It is an elevator device that.

  The present invention includes a car cage, a counterweight, a main rope that connects the car and the counterweight, a driving pulley that drives the main rope, a hoisting machine that drives the driving pulley, and the hoisting An elevator control device that controls the rotation of the machine, and a slip detection means that detects a slip amount between the drive pulley and the main rope, and the elevator control device has a normal The hoisting machine is rotationally controlled based on a speed pattern, and at the time of elevator diagnosis, the hoisting machine is accelerated and decelerated based on the speed pattern for elevator diagnosis in which the acceleration and deceleration of the driving pulley are larger than those of the normal speed pattern. Rotating the upper machine, detecting the slip amount by the slip detection means, and diagnosing the presence or absence of a decrease in frictional force between the drive pulley and the main rope based on the detected slip amount. Characteristic Since an elevator apparatus, before the reduction in the frictional force between the drive pulley and the main rope exits affect operation of the elevator, can be quickly and reliably detected.

1 is an overall configuration diagram of an elevator apparatus according to the present invention. It is the figure which showed the time change of the state quantity when a car carries out a driving | running | working driving | running | working in the normal operation service driving | operation of an elevator with the graph. It is the figure which showed the time change of the state quantity when a car carries out the descent | fall operation | movement in the normal operation service driving | operation of an elevator with the graph. In the traction diagnosis operation for accelerating / decelerating the elevator according to the first embodiment of the present invention, it is a graph showing the time variation of the state quantity when the car is in the ascending operation. In the traction diagnosis operation for accelerating / decelerating the elevator according to the first embodiment of the present invention, it is a graph showing the time change of the state quantity when the car is in a descending operation. It is an operation | movement flowchart of the elevator control apparatus in the traction diagnosis driving | operation of the elevator which concerns on Embodiment 1 of this invention. It is the figure which showed the time change of the state quantity when a car carries out the driving | running | working driving | running | working in the excitation diagnosis driving | operation in the vibration mode of the elevator which concerns on Embodiment 2 of this invention with the graph. It is an operation | movement flowchart of the elevator control apparatus in the case of performing remotely the traction diagnosis driving | operation of the elevator which concerns on Embodiment 3 of this invention. It is an operation | movement flowchart of the elevator control apparatus in the case of performing the traction diagnosis driving | operation of the elevator which concerns on Embodiment 3 of this invention by self-judgment.

First, the configuration and basic operation of the elevator according to the present invention will be described.
FIG. 1 is an overall configuration diagram of an elevator apparatus according to the present invention. The figure shows the configuration viewed from the side in the direction of the car entrance.

  As shown in FIG. 1, in the elevator, a main rope 3 that connects a car 1 and a counterweight 2 is hung on a driving pulley 4, and a hoisting machine 5 is connected to the driving pulley 4. When the elevator control device 21 controls the hoisting machine 5, the driving pulley 4 is rotated by the hoisting machine 5, and the main rope 3 and the main rope 3 are connected by the frictional force between the driving pulley 4 and the main rope 3. The car 1 and the counterweight 2 are caused to travel. During this travel, the elevator control device 21 controls the brake device 6 to release the force for holding the hoisting machine 5 stationary. On the other hand, when stopped, the elevator control device 21 controls the brake device 6 to hold the hoisting machine 5 stationary.

  The governor 7 is a device for detecting that the car 1 has reached a certain speed or more and for emergency stopping the car 1. The hoisting machine encoder 11 is a device that detects the rotation of the hoisting machine 5 and, in addition to the rotation of the hoisting machine 5 itself, indirectly detects the relative car position on the assumption that the traction capability is normal. it can. The governor encoder 12 detects rotation of the governor 7 and detects a relative car position. The landing position sensor 13 is provided at the landing on each floor, and determines whether or not the car 1 is at the landing position on the stop floor of the elevator. The car scale 14 detects the loaded weight of the car 1.

  The slip detection means 15 determines whether or not slip has occurred between the drive pulley 4 and the main rope 3. The configuration of the slip detection means 15 shown in FIG. 1 is an example. In this example, the rotation amount of the drive pulley 4 detected by the hoisting machine encoder 11 is compared with the car position (or movement amount) detected by the governor encoder 12, and the difference between the two is detected as slipping. The transmission is transmitted to the elevator control device 21.

  For example, a hoisting machine encoder 11 can be used as the rotation amount detecting means for detecting the rotation amount of the drive pulley 4. In addition to the governor encoder 12, a landing position sensor 13 can be used as a car position movement amount detection means for detecting the car position or movement amount of the car 1.

  The remote diagnosis device 22 communicates with a remote location, diagnoses via the elevator control device 21, or directly diagnoses the elevator device, and transmits information necessary for state diagnosis to the remote location. Thus, the traction ability can be confirmed by remote operation without direct inspection by the worker.

  FIG. 2 shows a time change graph of the state quantity when the car 1 performs the ascending operation during the normal operation service of the elevator. Here, the normal operation service refers to a state in which the elevator control device 21 has not detected an abnormality and is performing an operation of moving a car to the destination floor with passengers in the car 1. Each graph shows the direction in which the car ascends as positive (same throughout this specification). Further, although the weight of the car 1 varies depending on the loading state in the car, a case will be described below in which the loading weight in the car 1 is heavier than the counterweight 2. When the loading weight of the car 1 is lighter than the counterweight 2, the same explanation can be made by replacing the relationship between the car 1 and the counterweight 2 in the following description.

  The graph (a) represents the change over time of the traveling speed of the car 1. In the figure, the state of speed change is shown in which the state changes from the stop state to the acceleration state, reaches a constant speed v after the speed increases, then decelerates, and stops. v is the traveling speed at the rated capacity of the elevator apparatus.

  Graph (b) represents the time change of the acceleration of the hoisting machine 5. The case of constant acceleration and constant deceleration at the same acceleration / deceleration a1 is illustrated corresponding to the speed change of the graph (a). That is, the acceleration value is a1 during acceleration of the traveling speed of the car 1, and is -a1 during deceleration. At other times (during stopping and traveling at a constant speed v), the acceleration is zero.

  The graph (c) represents the time change of the output torque of the hoisting machine 5. Since the elevator apparatus has a weight imbalance between the car 1 and the counterweight 2, the hoisting machine 5 outputs a torque component that cancels the unbalanced weight in order to keep the car 1 stationary. There is a need to. The offset torque is shown as Tq, and the torque required for car acceleration / deceleration is shown as ΔTq1. That is, the torque value becomes Tq + ΔTq1 during acceleration of the traveling speed of the car 1, and Tq−ΔTq1 during deceleration. At other times (during stop and traveling at a constant speed v), the torque value is Tq.

  Graph (d) shows a change in tension of main rope 3. In the graph (d), T1 indicates the tension of the main rope 3 connecting the driving pulley 4 and the car 1. Further, t1 indicates the tension of the main rope 3 that connects the driving pulley 4 and the counterweight 2. In the graph (d), the maximum value and the minimum value of the tension T1 at the time of the car operation are shown as T1max and T1min, respectively, and the maximum value and the minimum value of the tension t1 are shown as t1max and t1min, respectively. That is, during acceleration of the traveling speed of the car 1, the tension T1 becomes the maximum value T1max, while the tension t1 becomes the minimum value T1min. Conversely, during deceleration of the traveling speed of the car 1, the tension T1 becomes the minimum value T1min, and the tension t1 becomes the maximum value t1max.

  FIG. 3 shows a time change graph of the state quantity when the car 1 descends while the elevator is operating normally. The parameter definition shown in each graph is the same as in FIG. Note that the graphs (a) to (d) in FIG. 3 are merely opposite to those in the graphs in FIGS. 2 (a) to (d), and thus detailed description thereof is omitted here.

  Here, the traction ability which becomes a problem is demonstrated. The general formula for traction capability is shown below (Formula 1).

  Here, among the main ropes 3 sandwiching the drive pulley 4, the higher tension is Ta and the lower tension is Tb (hereinafter, generally, Ta / Tb is the tension ratio). k is a coefficient generally corresponding to the groove shape of the drive pulley 4, μ is a coefficient of friction between the drive pulley 4 and the main rope 3, and θ is an angle at which the main rope 3 is wound around the drive pulley 4. The right side of Expression 1 (exp (k × μ × θ)) indicates the traction capability, and when the tension ratio (Ta / Tb) on the left side is larger than the right side (that is, Ta / Tb> exp (k × (μ × θ)), slip occurs (reference: for example, Mechanical Engineering Handbook (Basic) A3 Mechanics / Mechanical Mechanics [Edited by the Japan Society of Mechanical Engineers], Page: A3-35, Date of issue: June 30, 1986 (See second print)).

  As is apparent from the graphs of FIGS. 2 (d) and 3 (d), in traveling in the normal service service assumed in this example, in ascending traveling (FIG. 2 (d)), traveling downward (see FIG. 3). In (d)), during deceleration, the tension ratio becomes T1max / t1min, and the value is maximized.

  Therefore, in the prior art, as long as the traction ability is inspected by checking the presence or absence of slipping by traveling according to the same driving pattern as the basic service, slipping occurs when a tension ratio of T1max / t1min or more occurs. It was not possible to confirm whether or not the traction occurred, and it was not possible to detect at an early stage that the traction capability gradually declined due to aging or the like before it affected the service. Moreover, since the main rope 3 part which can exhibit the traction capability in the state where the tension ratio is maximized is extremely limited, the entire main rope 3 cannot be inspected.

  Therefore, in the present invention, the hoisting machine 5 is driven by a speed change pattern in which the acceleration and deceleration of the drive pulley 4 are set to values larger than those at the time of normal service, and the presence or absence of slip is detected during driving. The size of the friction force between the driving pulley 4 and the main rope 3 is judged according to the size, and it is detected at an early stage before the service is affected that the traction ability is reduced. We propose an elevator system that enables inspection of The embodiment is shown below.

Embodiment 1 FIG.
The configuration of the elevator device in the present embodiment is the same as the configuration in which only the remote diagnosis device 22 is excluded from the configuration in FIG. 1 described above. Therefore, description of the configuration is omitted here.

  Next, the operation will be described. FIG. 4 shows a time change graph of the state quantity when the car is in the ascending operation during the traction diagnosis operation for accelerating / decelerating the elevator in the first embodiment.

  4 (a) to 4 (d) show a temporal change in a speed pattern and a related state quantity for detecting a decrease in traction capability. Therefore, as a matter of course, these graphs are different from those in the normal operation service shown in FIG. The parameter definitions shown in these graphs are the same as those in FIG. However, when there is a difference in the size of the same kind of state quantity, the additional symbol is set to 2 (example: a2, ΔTq2, T2, t2, etc.).

  In the speed pattern for detecting a decrease in traction capability in the present embodiment, first, as shown in FIG. 4B, the acceleration / deceleration is larger than a1 that is the acceleration / deceleration at the time of normal operation service. The value is changed to a2 (a1 <a2). The acceleration / deceleration speed a1 at the time of the normal operation service is changed according to the installation location and the needs of the user, but is usually about 0.1G. Also, in general ordinary elevator equipment, from the viewpoint of improving the ride comfort of the user, it is not operated at the limit acceleration that the system can demonstrate, so it is only adjusted during driving to check the traction capacity. It is possible to increase the speed. As a result, as shown in FIG. 4C, the value of the output torque of the hoisting machine 5 also increases, the torque value becomes Tq + ΔTq2 during acceleration of the traveling speed of the car 1, and Tq−ΔTq2 during deceleration. (ΔTq1 <ΔTq2). Further, as shown in FIG. 4D, the tension of the main rope 3 connecting the driving pulley 4 and the car 1 becomes T2 (T2 <T1), and the tension of the main rope 3 connecting the driving pulley 4 and the counterweight 2 is increased. The tension is t2 (t2 <t1). In addition, the maximum value and the minimum value of the tension T2 during the car operation are T2max and T2min (T1max <T2max, T2min <T1min), and the maximum value and the minimum value of the tension t2 are t2max and t2min (t1max <t2min). t2max, t2min <t1min). As a result, in the speed pattern of the normal service, it was possible to confirm only whether or not slipping occurred at the tension ratio at T1max / t1min, whereas it was possible to confirm up to the tension ratio T2max / t2min (T1max / t1min < T2max / t2min).

  Here, the hoisting machine 5 is rotated so that the rotational speed of the drive pulley 4 follows the changed speed pattern, and a2 can be freely changed as necessary, so that it is necessary according to the traction ability to be confirmed. It is possible to generate a simple tension ratio.

  Second, in the speed pattern for detecting a decrease in traction capability in the present embodiment, as shown in FIG. 4A, the speed pattern repeats acceleration and deceleration a plurality of times. In this way, by repeating acceleration and deceleration, the main rope 3 portion that exhibits the traction ability in a state where the tension ratio is maximized can be widened. With regard to this repeated pattern, by combining a plurality of patterns such as shifting the travel start position, it is possible to confirm the presence or absence of traction capability in a state where the tension ratio is maximized in the entire area of the main measure 3.

  FIG. 4 shows the change in the state quantity according to the speed pattern during the ascending operation in the present embodiment, whereas FIG. 5 shows the speed pattern during the descending operation. Compared with the change from the maximum value to the minimum value of the tension of the main rope 3 in FIGS. 2 and 3, the width of the change in the tension in FIGS. 4 and 5 from the maximum value to the minimum value becomes large, and T2min and t2max There may also be an event where the magnitude relationship changes. However, the traction capability is confirmed in the relationship between the tension T2max and the t2min exhibiting the maximum tension ratio, and the above description holds true even if the magnitude relationship between the T2min and the t2max changes.

  4 and 5, each speed pattern repeats acceleration and deceleration below the speed v. This is because the elevator generally stops when the safety device operates at a speed higher than the rated speed by a predetermined amount or more. Therefore, a repetitive pattern at a rated speed v or less is selected as a pattern for inspecting the safety device so that it does not operate over a wide range of long main ropes. As long as the acceleration / deceleration is selected and the same effect can be obtained, other patterns can be implemented.

  FIG. 6 shows an operation flowchart when the elevator control device 21 performs a diagnostic operation. After the diagnosis operation is started by the operation of the maintenance staff, the elevator control device 21 performs the diagnosis operation by operating the elevator with the speed pattern shown in FIG. 4 and / or FIG. 5 (STEP 1). Then, the amount of slip (slip magnitude) when performing diagnostic driving is determined (STEP 2). As a method of obtaining the slip amount (STEP 2), for example, the amount of rotation of the hoisting machine 5 detected by the hoisting machine encoder 11 and the amount of movement of the car position detected by the governor encoder 12 are compared, The difference can be detected as a slip. Alternatively, a sensor that detects slippage may be provided between the main rope 3 and the drive pulley 4 to directly detect the slip that occurs between the main rope 3 and the drive pulley 4. Next, it is determined whether or not the traction capability is sufficient from the slip amount obtained in STEP 2 (STEP 3). As a method of determining whether or not the traction capability is sufficient (STEP 3), for example, when there is no difference between the rotation amount and the movement amount in STEP 2 described above, or the friction coefficient of the main measure 3 Considering characteristics such as the groove coefficient of the drive pulley 4, it is determined that the traction capability is sufficient when the difference between the two is within a predetermined range that can be normally generated. Next, the determination result (diagnosis result) of the presence or absence of traction capability is displayed (STEP 4), and the diagnosis operation is completed. The judgment result display (STEP 4) displays at least information on whether or not there is sufficient traction capability so that maintenance personnel can confirm, and if necessary, display the slip amount together. Also good.

  By this procedure, traction inspection operation by acceleration / deceleration can be performed, and a decrease in traction capability can be detected.

  As described above, in the present embodiment, the car 1, the counterweight 2, the main rope 3 that connects the car 1 and the counterweight 2, the drive pulley 4 that drives the main rope 3, and the drive A normal operation service comprising a hoisting machine 5 that drives the pulley 4, an elevator control device 21 that controls the rotation of the hoisting machine 5, and slip detection means that detects slipping between the driving pulley 4 and the main rope 3. The hoisting machine 5 is driven by a speed change pattern having acceleration and deceleration of the drive pulley larger than the time, and the slip is detected by the slip detection means at the time of the drive, and the drive pulley 4 and the main pulley are detected by the detected magnitude of the slip. Since the magnitude of the frictional force with the cable 3 is determined, it can be detected promptly and reliably before the decrease in traction capability affects the operation service of the elevator.

Embodiment 2. FIG.
In the first embodiment described above, the inspection operation is performed with a predetermined acceleration / deceleration pattern, thereby increasing the value of the tension ratio to be maximized and repeating the acceleration / deceleration at the acceleration / deceleration. It was shown that the range of the position of the cord 3 can be widened. However, in order to accelerate and decelerate the overall inertia including the car 1 and the counterweight 2 at a high acceleration, a corresponding capacity is required for the hoist 5 and the like. Therefore, in the present embodiment, an inspection method for generating a high tension ratio even when the hoisting machine 5 or the like does not have such a high capability will be described below. In addition, the structure of the elevator apparatus in this Embodiment is the same structure as the structure except except only the remote diagnostic apparatus 22 from the structure of the above-mentioned FIG.

  Specifically, as the inspection method, a speed change pattern having the same frequency as the resonance frequency of the elevator apparatus is given as a torque drive command for the hoisting machine 5 to accelerate and decelerate the car 1 and the counterweight 2. Compared to the high tension ratio. As the resonance frequency at this time, it is desirable to select a vibration mode in a direction in which the tension ratio increases. In particular, in the present embodiment, the main pulley 3 is considered as a spring element, and the driving pulley 4 is set in a vibration mode in which only the hoisting machine 5 is excited without exciting the car 1 and the counterweight 2. By oscillating, the tension ratio increases.

  The vibration frequency ω of the driving pulley 4 in the vibration mode is calculated by the following calculation formula (Formula 2).

  Here, J is the inertial mass of the entire drive pulley 4 including the rotor of the hoisting machine 5, and is converted into a translational component based on the effective diameter of the drive pulley 4. k1 is the spring coefficient of the main rope 3 from the car 1 to the drive pulley 4, and K2 is the spring coefficient of the main rope 3 from the counterweight 2 to the drive pulley 4. The spring coefficient is the ratio of the increase in tension to the amount of extension of the main rope 3. In addition, if there is a damping spring or a pulley that changes the direction of the main rope 3 between the car 1 etc. and the main rope 3, and if it affects the system resonance frequency, k1 and k2 will affect the spring stiffness. Need to be considered. Furthermore, since the main rope 3 has a spring coefficient that varies depending on its length, ideally, it is desirable that k1 and k2 are determined according to the car position to give a vibration cycle. However, even if the resonance frequency is determined with k1 and k2 as average values corresponding to the respective positions, the resonance component can be excited, and a larger tension ratio than that in the normal acceleration / deceleration in the first embodiment. Is obtained.

  An example of traveling with a torque pattern including the resonance frequency will be described with reference to FIG. The parameter definitions shown in the graphs (a) to (d) in FIG. 7 are the same as those in FIG. However, if there is a difference in the size of the same kind of state quantity, the additional symbol is set to 3 (example: a3, ΔTq3, T3, t3, etc.). In addition, the example of FIG. 7 has shown the time change of the state quantity in case a car carries out a driving | running operation.

  Focusing on the graph (c), it can be seen that a resonance component is added to the torque during running at the rated speed as compared with FIG. 2 (c). As a result, vibration in a predetermined mode is excited. Since the vibration of the car speed 1 and the counterweight 2 gives torque vibration at a frequency that is difficult to be excited, the car speed does not show much vibration (see graph (a)). Further, in this vibration mode, the tension vibrations are in opposite phases at T3 and t3, and the main pulley 3 connecting the driving pulley 4 and the car 1 is extended to increase the tension T3, so that the driving pulley 4 and the counterweight are increased. Since the main rope 3 connecting 2 is contracted and the tension t3 is reduced, the maximum tension ratio can be ideally set to T3max / t3min, and generation of a large tension ratio can be expected.

  In this way, the major difference between the speed patterns in FIG. 2 and FIG. 7 is that in FIG. 2, the rated speed travel is performed at a constant speed v between acceleration and deceleration, whereas in FIG. Is a speed pattern in which the hoisting machine 5 is driven in a vibration manner with a predetermined vibration width centered on the constant speed v, not between the constant speed v and between acceleration and deceleration. It is.

  In the present embodiment, the vibration component torque is not added at the time of acceleration / deceleration, but it may be added at the time of acceleration / deceleration, or may be vibrated in a stopped state. In addition, there is concern that the safety device may detect an excessive speed and stop when the car speed is touched by vibration. On the other hand, an excessive speed can be prevented by performing an excitation operation at a speed lower than the rated speed.

  As described above, in the present embodiment, the same effects as those of the first embodiment described above can be obtained, and the traction diagnosis can be performed by vibrating the drive pulley 4 by the hoisting machine 5. In this case, the hoisting machine 5 is vibrated at a frequency that generates a resonance vibration mode in which the tension ratio of the main rope 3 is maximized, and the magnitude of the frictional force between the driving pulley 4 and the main rope 3 is determined. Therefore, in this vibration mode, the vibration of the tension is in an opposite phase between T3 and t3, and the main pulley 3 connecting the driving pulley 4 and the car 1 is extended to increase the tension T3. 4 and the balance weight 2 are contracted and the tension t3 is reduced, so that the maximum tension ratio can be ideally set to T3max / t3min, and the generation of a large tension ratio can be expected. can get. Thereby, even in the hoisting machine 5 that does not have a high capacity, a high tension ratio can be generated and the traction inspection can be performed.

Embodiment 3 FIG.
In the present embodiment, an embodiment is described in which a traction diagnosis is performed by communication from a remote place, so that a worker can confirm by a remote operation without performing a direct inspection.

  The elevator apparatus according to the present embodiment includes a remote diagnosis apparatus 22 as shown in FIG. Other configurations and operations are the same as those in the first embodiment or the second embodiment described above, and thus description thereof is omitted here. The remote diagnosis device 22 performs communication between a remote monitoring system installed in a remote place that supervises elevator maintenance such as a maintenance center and the elevator device, and performs a diagnostic operation on the elevator device according to an instruction from the remote monitoring system. It is a device for making it.

FIG. 8 shows an operation flow of the remote diagnosis device 22.
The remote diagnostic device 22 enters this operation flow in response to a diagnostic operation request from a remote monitoring system installed in a remote place such as a maintenance center. First, the elevator apparatus prepares for the start of traction diagnosis operation (STEP 11). As preparations, it is determined whether the sensors necessary for diagnostic operation and the hoisting machine 5 are operable, or notifying the passenger that the diagnosis is to be performed and confirming that there are no passengers in the car 1. Do. The presence / absence of passengers in the car 1 may be determined from the weight in the car 1 by the car scale 14, or a detection sensor for detecting a person is provided in the car 1 separately. May be. After preparation (STEP 11), it is determined whether or not traction diagnostic operation is possible (STEP 12). If diagnostic operation is not possible, that fact is notified to the remote monitoring system of the maintenance center (STEP 13) . If the diagnosis operation is possible, the traction diagnosis operation is performed (STEP 14), the slip amount is confirmed (STEP 15), and the traction is determined (STEP 16). Note that the processing of STEPs 14 to 16 corresponds to the processing of STEPs 1 to 3 in FIG. 6, so that reference will be made to that and description thereof will be omitted here. After executing the traction determination, the traction diagnosis result is notified to the remote monitoring system of the maintenance center (STEP 17).

  After the notification in the case where the diagnostic operation in STEP13 cannot be performed or the notification of the traction diagnosis result in STEP17, it is determined whether or not the normal operation service can be continued (STEP18). If it is determined that the service is possible, it returns to the normal operation service. On the other hand, if it is determined that the service is not possible, it notifies the maintenance center's remote monitoring system (STEP 19) and stops the elevator service. (STEP20).

  In the present embodiment, the diagnostic operation is performed in response to a diagnostic operation request through communication from a remote monitoring system installed in a remote place. However, the present invention is not limited to this, and even when there is no instruction from the remote monitoring system. The remote diagnosis device 22 may periodically perform diagnosis operation by self-judgment and transmit the diagnosis result to the remote monitoring system.

  In addition, although a communication device having a communication function is used as an example of the remote diagnosis device 22, the present invention is not limited to this, and a configuration in which the communication function is excluded and the diagnosis device is simply used may be employed. In this case, although the diagnosis result cannot be obtained unless the user goes to the site where the elevator apparatus is installed, the effect of automatically detecting the decrease in traction and stopping the service can be obtained. A specific operation flow in this case is shown in FIG. The configuration of the flow is the one excluding the operations (STEPs 13, 17, and 19) related to the communication shown in FIG.

  As described above, in the present embodiment, the same effects as those of the first or second embodiment can be obtained, and further, a remote diagnosis apparatus that receives an instruction from a remote monitoring system installed in a remote place 22 is provided so that the traction diagnosis is performed in accordance with the instruction, so that the operator can confirm it by remote operation without directly inspecting. Even if there is no instruction from a remote place, if the remote diagnosis device 22 makes a traction diagnosis periodically by self-judgment, the labor can be saved and the worker can directly inspect. And the effect that the diagnosis result can be confirmed at a remote place is obtained.

  In the first to third embodiments, when the hoisting machine 5 is accelerated or decelerated, it may not be possible to obtain a necessary output in terms of quick response or the like only with the torque driving ability. In such a case, the braking force by the brake device 6 may be used or used together.

  1 car, 2 counterweight, 3 main rope, 4 drive pulley, 5 hoisting machine, 6 brake device, 7 speed governor, 11 hoisting machine encoder, 12 speed governor encoder, 13 landing position sensor, 14 ride Car balance, 15 slip detection means, 21 elevator control device, 22 remote diagnosis device.

Claims (3)

The car,
A counterweight,
A main rope connecting the ride car and the counterweight;
A driving pulley for driving the main rope;
A hoist that drives the drive pulley;
An elevator control device for controlling rotation of the hoist;
Slip detecting means for detecting the amount of slip between the drive pulley and the main rope,
The elevator control device
During normal operation, the hoisting machine is rotationally controlled based on a preset normal speed pattern,
At the time of elevator diagnosis, the hoisting machine is rotationally controlled on the basis of a speed pattern for elevator diagnosis in which the acceleration and deceleration of the drive pulley are larger than those of the normal speed pattern, and the slip detection means performs the above An elevator apparatus characterized by detecting a slip amount and diagnosing the presence or absence of a decrease in frictional force between the drive pulley and the main rope based on the detected slip amount.   The elevator apparatus according to claim 1, wherein the hoisting machine vibrates the driving pulley when the driving pulley is driven.   Connected to a remote monitoring system installed at a remote location, receives a diagnostic operation request from the remote monitoring system, and diagnoses the presence or absence of a decrease in frictional force in the elevator control device according to the diagnostic operation request The elevator apparatus according to claim 1, further comprising a remote diagnosis apparatus for instructing

Images