JP2010202391A - Control device of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily detect abnormality of a guide rail from torque change of a motor without requiring any special device. <P>SOLUTION: The control device of the elevator detects a torque instruction value provided for the motor 5 while operating a car 8 is detected by a torque instruction detection part 12 and its variation is detected by a torque instruction variation detection part 13. An abnormality detection part 15 determines that the guide rail of the car 8 is abnormal in the case that the variation of the torque instruction value detected by the torque instruction variation detection part 13 exceeds a threshold value set by an abnormal detection threshold value setting part 14 and reports via a buzzer output part 17 or a display part 18. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an elevator control device that detects an abnormality in an elevator guide rail.

  A pair of guide rails are erected in the elevator hoistway so as to sandwich both sides of the car. The car is supported by the guide rail and moves up and down in the hoistway.

  Normally, a guide rail consists of multiple rail members connected in the up-and-down direction, and if there is a step in the joint of the rail members or if there are scratches or dents, the car will vibrate during travel and make it comfortable to ride. Influence. Therefore, when the guide rail is installed, it is necessary to inspect the level difference of the joint.

  Here, conventionally, there are those disclosed in Patent Documents 1 and 2 as measuring instruments for inspecting the guide rail.

  The measuring device of Patent Document 1 includes a first sensor for detecting a relative distance between a lifting body (car) and a guide rail, and a second sensor for detecting an absolute displacement of the lifting body. The installation accuracy of the guide rail is measured from the detection result of the sensor. The measuring instrument of Patent Document 2 includes a first moving body and a second moving body, and detects displacement when the first moving body and the second moving body are pressed against two joined rail members. By doing so, the joint state of the guide rail is measured.

JP 2006-242808 A Japanese Patent Laid-Open No. 10-53381

  If a measuring device like the said patent documents 1 and 2 is used, the state of a guide rail can be test | inspected correctly. However, since these are special devices, there is a problem that the purchase is expensive. Furthermore, there is a problem that an inspector needs to perform troublesome work such as setting the measuring device on a guide rail to perform an inspection, which takes time and burdens on the inspector.

  The present invention has been made in view of the above points, and provides an elevator control device that can easily detect an abnormality of a guide rail from a change in torque of a motor without requiring a special device. Objective.

  An elevator control apparatus according to the present invention includes a motor for driving a car, a torque command detection means for detecting a torque command value given to the motor during operation of the car, and a detection by the torque command detection means. A torque command change amount detecting means for detecting a change amount of the torque command value, a threshold setting means for setting an abnormality detection threshold for the change amount of the torque command value detected by the torque command change amount detecting means; An abnormality determining unit that determines that there is an abnormality in the guide rail that supports the car when the amount of change in the torque command value exceeds a threshold set by the threshold setting unit, and the guide rail And a notification means for notifying that when an abnormality is detected.

  According to the present invention, it is possible to easily detect an abnormality of the guide rail from a change in the torque of the motor without requiring a special device.

FIG. 1 is a block diagram illustrating a configuration example of an elevator control device according to a first embodiment of the present invention. FIG. 2 is a diagram showing a configuration of a guide rail that supports an elevator car in the embodiment. FIG. 3 is a diagram for explaining the relationship between the running pattern of the car and the torque command, the amount of change in the torque command, and the abnormal time in the embodiment, and shows a normal state. FIG. 4 is a diagram for explaining the relationship between the traveling pattern of the car and the torque command, the amount of change in the torque command, and the abnormal time in the embodiment, and shows a state at the time of abnormality. FIG. 5 is a flowchart showing the processing operation during the diagnostic operation of the elevator in the same embodiment. FIG. 6 is a view showing a configuration of a guide rail that supports a counterweight of the elevator in the same embodiment. FIG. 7 is a diagram showing the relationship between the elevator car and the counter weight in the same embodiment. FIG. 8 is a block diagram showing a configuration example of an elevator control device according to the second embodiment of the present invention. FIG. 9 is a diagram for explaining the relationship between the traveling pattern of the car and the torque command, the amount of change in the torque command, and the abnormal time in the second embodiment. FIG. 10 is a block diagram illustrating a configuration example of an elevator control device according to the third embodiment of the present invention. FIG. 11 is a flowchart showing the processing operation during the diagnostic operation of the elevator in the same embodiment. FIG. 12 is a flowchart showing the processing operation during the elevator inspection operation in the same embodiment. FIG. 13 is a diagram showing an example when the car position and the counter weight position are stored in the abnormality detection position storage unit in the same embodiment. FIG. 14 is a block diagram illustrating a configuration example of an elevator control device according to the fourth embodiment of the present invention. FIG. 15 is a block diagram illustrating a configuration example of an elevator control device according to the fifth embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a block diagram illustrating a configuration example of an elevator control device according to a first embodiment of the present invention.

  This elevator includes a motor 5 of a hoisting machine, a sheave 7, a rope 7a, a car 8, a counterweight 9, and the like. The detailed mechanism is not directly related to the present invention, and the description thereof will be omitted.

  The car 8 moves between the floors of the building with the user on it, and one end of the rope 7a is connected. The rope 7a is wound around the sheave 7, and a counterweight 9 is connected to the other end. Thus, as the motor 5 is driven, the car 8 moves in a sliding manner in the direction opposite to the counterweight 9 via the rope 7a.

  Here, as shown in FIG. 2, a pair of guide rails 30a and 30b are erected in the hoistway, and the car 8 is supported by the guide rails 30a and 30b so as to be movable in the elevating direction. The guide rails 30a and 30b are formed by connecting a plurality of rail members in the up and down direction. 31a and 31b in the figure indicate joints of rail members.

  The elevator also includes a speed command unit 1, a speed control unit 2, a current control unit 3, a current detector 4, a speed detection unit 6, and a car position detection unit as components for controlling the moving speed of the car 8. 10. A rope self-weight compensation torque setting unit 11 is provided.

  The speed command unit 1 outputs a speed command value according to a predetermined traveling pattern. The speed detector 6 detects the rotational speed of the motor 5. The speed control unit 2 obtains a deviation between the speed command value from the speed command unit 1 and the speed value detected by the speed detection unit 6, and outputs a torque command value for the motor 5 so that this deviation is eliminated.

  The current control unit 3 determines a current value to be supplied to the motor 5 based on the torque command value output from the speed control unit 2. The current detector 4 detects the supply current value to the motor 5 and feeds it back to the current control unit 3. The current control unit 3 controls the current supplied to the motor 5 so that the current value detected by the current detector 4 becomes a target value.

  The motor 5 is composed of, for example, a three-phase AC motor, and is driven by a three-phase current supplied from the current control unit 3. By driving the motor 5, the car 8 moves up and down in the hoistway through the sheave 7 and the rope 7a.

  In addition, the car position detection unit 10 detects the position of the car 8. As the detection method, for example, there is a method of using an encoder (not shown) that outputs a pulse signal in synchronization with the traveling of the car 8 as the motor 5 is driven.

  The rope self-weight compensation torque setting unit 11 calculates the fluctuation rate of the rope self-weight torque based on the car position information obtained by the car position detection unit 10, and feeds back this to the speed control system as the compensation torque. As a result, a value obtained by adding the compensation torque of the own weight of the rope to the torque command value output from the speed control unit 2 is given to the current control unit 3 as a final torque command.

  In this configuration of the speed control system, in this embodiment, the torque command detection unit 12, the torque command change amount detection unit 13, the abnormality detection threshold setting unit 14, the abnormality determination unit 15, the operation mode selection unit 16, the buzzer An output unit 17 and a display unit 18 are provided.

  The torque command detection unit 12 detects a torque command given to the motor 5. The torque command change amount detection unit 13 detects the change amount per unit time of the torque command detected by the torque command detection unit 12. The abnormality detection threshold value setting unit 14 sets a torque abnormality threshold value with respect to the change amount of the torque command.

  The abnormality determination unit 15 counts the time when the change amount of the torque command detected by the torque command change amount detection unit 13 exceeds the threshold set by the abnormality detection threshold setting unit 14, and based on the counted time Then, it is determined whether or not the guide rails 30a and 30b that support the car 8 are abnormal.

  The operation mode selection unit 16 includes, for example, switches and buttons provided in a machine room and the like, and selects any one of “normal operation mode”, “diagnostic operation mode”, and “inspection operation mode” as the operation mode of the elevator. .

  The “normal operation mode” is a mode in which a normal operation service is performed, and the car 8 is called and driven to the registered floor when the landing call or car call is registered. On the other hand, the “diagnostic operation mode” is a mode for automatically diagnosing the state of the guide rails 30a and 30b, and the “inspection operation mode” is a mode for inspecting abnormal portions detected by the automatic diagnosis. .

  The buzzer output unit 17 and the display unit 18 are used as a notification unit for notifying abnormality of the guide rails 30a and 30b. The buzzer output unit 17 notifies the abnormality by outputting a buzzer sound, and the display unit 18 notifies the abnormality by turning on the LED.

  In such a configuration, normally, the “normal operation mode” is selected by the operation mode selection unit 16, and an appropriate torque command in consideration of the own weight of the rope is given to the current control unit 3, and the current control unit 3 The motor 5 is driven and controlled by the current output from. As the motor 5 is driven, the car 8 travels at a predetermined speed via a rope 7 a wound around the sheave 7.

  Here, if there is a step in the joint between the guide rails 30a and 30b that support the car 8, or there are scratches or dents, the car 8 will vibrate during travel and affect the riding comfort. When inspecting the state of the guide rails 30a and 30b causing such vibration, the “diagnostic operation mode” is selected.

  In the “diagnostic operation mode”, the car 8 is caused to travel at a speed set in advance for diagnostic operation, and the amount of change in torque command during the travel is monitored. In this case, if there is any abnormality in the guide rails 30a and 30b, an extra load is applied to the motor 5, and an impulse disturbance occurs in the torque command according to the load. Therefore, a threshold value is provided for the change amount of the torque command, and when this threshold value is exceeded, it is determined that there is an abnormality in the guide rails 30a and 30b.

  Hereinafter, a method for detecting an abnormality of the guide rails 30a and 30b in the first embodiment will be described in detail.

  3 and 4 are diagrams for explaining the relationship between the traveling pattern of the car and the torque command, the amount of change in the torque command, and the abnormal time in the first embodiment, and FIG. FIG. 4 shows a state at the time of abnormality. 3 and 4, (a) is a traveling pattern of the car speed, (b) is a torque command, (c) is a change amount of the torque command, and (d) is an abnormal time of the change amount of the torque command. ing.

  The abnormality detection of the guide rails 30a and 30b is performed by comparing the torque command output when the car 8 is traveling in a steady state with a threshold value (see FIGS. 3A and 3C). “Steady traveling” refers to a state in which the car 8 is traveling at a constant speed after acceleration. Since the torque basically does not change during the steady running, the abnormality of the guide rails 30a and 30b can be accurately detected by comparing the change amount at that time with the threshold value. Note that during periods other than steady running (during acceleration or deceleration), the torque varies greatly, so it is difficult to accurately detect an abnormality in the guide rails 30a and 30b.

  Here, the threshold set by the abnormality detection threshold setting unit 14 is “dTMLMT0”. This threshold value “dTMLMT0” is set for detecting an abnormality in the guide rails 30a and 30b, and is set lower than a general threshold value for detecting, for example, a torque abnormality caused by a failure of the motor 5 or the like. .

  Specifically, the amount of torque change that occurs when there is a step in the joints 31a, 31b of the guide rails 30a, 30b is repeatedly examined in advance, and the value of “dTMLMT0” is set according to the amount of change. ing.

  When the torque command change amount during the steady running exceeds the threshold value “dTMLMT0”, it is determined that there is some abnormality in the guide rails 30a and 30b. For example, the LED is turned on by the display unit 18 or the buzzer output unit 17 By outputting a sound, the inspector is informed that there is an abnormality in the guide rails 30a and 30b.

  Further, as a countermeasure for erroneous detection due to the influence of noise, the time when the torque command change amount exceeds the threshold “dTMLMT0” is counted. Then, as shown in FIGS. 3C and 3D, if the change amount of the torque command returns to the threshold value “dTMLMT0” or less within the predetermined time “TIM0”, it is determined that it is due to noise, and the count value is set. clear. On the other hand, as shown in FIGS. 4C and 4D, when the state where the change amount of the torque command exceeds the threshold “dTMLMT0” continues for a predetermined time “TIM0” or more, the guide rails 30a and 30b are abnormal. It is determined that there was.

The operation of the first embodiment will be described with reference to FIG.
FIG. 5 is a flowchart showing the processing operation during the diagnostic operation of the elevator in the first embodiment.

  When the “diagnostic operation mode” is selected by the operation mode selection unit 16 (Yes in Step S11), the car 8 moves to the farthest floor (the lowermost floor or the uppermost floor) (Steps S12 and S13). The diagnostic operation is started from (Step S14). In this diagnostic operation, the car 8 is traveled one way or reciprocally at a constant speed (step S15), and the amount of change in torque command during that time is monitored (step S16).

  Here, the threshold value “dTMLMT0” described with reference to FIG. 4 is applied while the car 8 is traveling normally. It can be determined from the speed change that the car 8 is in steady running. That is, when the speed of the car 8 becomes a certain value (other than zero) and there is no speed change for a predetermined period or longer, it can be determined that the car is in steady running.

  During steady running, when the torque command change amount exceeds the threshold “dTMLMT0” (Yes in step S16) and the state continues for a predetermined time “TIM0” (Yes in step S17), the abnormality determination unit 15, it is determined that there is an abnormality in the guide rails 30a and 30b, and a notification to that effect is made through the buzzer output unit 17 or the display unit 18 (step S18). The same process is repeated until the diagnostic operation is completed (step S19).

  As described above, according to the first embodiment, the change amount of the torque command is monitored, and it is determined that there is some abnormality in the guide rails 30a and 30b when the state exceeding the threshold value continues for a predetermined time or more. Therefore, even if the inspector does not directly inspect the guide rails 30a and 30b using a special device, it is possible to easily detect the presence or absence of an abnormality and cope with it.

  In the first embodiment described above, only the guide rails 30a and 30b that support the car 8 are focused on and the abnormality of the guide rails 30a and 30b is detected from the torque change.

  However, actually, as shown in FIG. 6, a pair of guide rails 32 a and 32 b are also provided for the counterweight 9. The guide rails 32a and 32b are formed by connecting a plurality of rail members in the ascending / descending direction, similarly to the guide rails 30a and 30b of the car 8. 33a and 33b in the figure indicate joints of rail members.

  In this case, as the car 8 moves, the counterweight 9 is also supported by the guide rails 32a and 32b and moves up and down. Therefore, there is a possibility that the counterweight 9 has a cause on the guide rails 32a and 32b side when the change amount of the torque command exceeds the threshold “dTMLMT0”.

  Here, as shown in FIG. 7, the positions of the car 8 and the counterweight 9 are in a relative relationship. Therefore, when the change amount of the torque command exceeds the threshold value, the position of the counterweight 9 corresponding to the position of the car 8 at that time is stored, and the guide rails 32a and 32b provided on the counterweight 9 side are stored. It is preferable to check.

  A specific position when an abnormality is detected will be described in detail in a third embodiment to be described later.

(Second Embodiment)
Next, a second embodiment of the present invention will be described.

  In the second embodiment, the amount of change in the compensation torque corresponding to the weight of the rope is reflected in the threshold setting for abnormality detection.

  FIG. 8 is a block diagram showing a configuration example of an elevator control device according to the second embodiment of the present invention. In FIG. 8, the same components as those in FIG. 1 in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The rope self-weight compensation torque setting unit 11 calculates the fluctuation rate of the rope self-weight torque based on the car position information obtained by the car position detection unit 10, and feeds back this to the speed control system as the compensation torque. Further, in the second embodiment, the rope self-weight compensation torque set by the rope self-weight compensation torque setting unit 11 is output to the abnormality detection threshold setting unit 14.

  Hereinafter, a method for detecting an abnormality of the guide rails 30a and 30b in the second embodiment will be described in detail.

  FIG. 9 is a diagram for explaining the relationship between the traveling pattern of the car and the torque command, the amount of change in the torque command, and the abnormal time in the second embodiment. In FIG. 9, (a) represents a traveling pattern of the car speed, (b) represents a torque command, (c) represents a change amount of the torque command, and (d) represents an abnormal time of the change amount of the torque command.

  It has been found that in a compensator type elevator, the torque fluctuates while having a certain inclination while the car 8 is traveling. The compensator type elevator is an elevator in which a compen- sion rope (abbreviation of compensating rope) is not attached to the car 8. The compensation rope is a rope for eliminating the imbalance of the weight of the rope 7 a that suspends the car 8.

  That is, when the car 8 is on the uppermost floor and when it is on the lowermost floor, the length of the hanging rope 7a differs between the car 8 side and the counterweight 9 side. In order to eliminate the unbalance at this time, a compen- sion rope is hung and connected to the lower part of the car 8 and the lower part of the counterweight 9. Therefore, in such an elevator without a compen- sion rope, the load on the rope 7a varies depending on the position of the car 8, so that the torque necessary for driving the motor 5 also varies.

  In this case, in the configuration of the first embodiment, even if the torque change so large as to feel the vibration of the car 8 does not occur during traveling, it is pulled to the abnormality detection threshold value dTMLMT0 due to the fluctuation of the torque command value depending on the car position. There is a possibility of hanging.

  Therefore, in the second embodiment, the inclination of torque during traveling is obtained, and the value of the abnormality detection threshold “dTMLMT0” is corrected to prevent erroneous detection due to a torque change due to the car position in a normal state.

  The torque variation that is a problem here is rope self-weight compensation torque that attempts to compensate for the rope self-weight that varies mainly depending on the car position. When this rope self-weight compensation torque is represented by TmCMP, the proportionality constant is represented by Gc, the car position detected by the car position detector 10 is represented by POS [m], and the intermediate position of the hoistway is represented by MID_POS [m], 1) It can be expressed by a linear function as shown in the equation.

TmCMP = Gc × (POS−MID_POS) (1)
Further, assuming that the sampling period of the torque change amount is Ts and the speed at the time of steady running of the car 8 detected by the speed detector 6 is Ve, the compensation torque “TmCMP0” of the rope weight in one processing period is It can be expressed by a linear function as shown in equation (2).

TmCMP0 = Gc × Ve × Ts (2)
That is, in the second embodiment, as shown in the above equation (2), the speed at the time of steady running is sampled in units of a predetermined time so as to obtain the variation in compensation torque at each sampling point.

  Such a calculation process is performed by the rope self-weight compensation torque setting unit 11 and the compensation torque “TmCMP0” is given to the abnormality detection threshold setting unit 14. Accordingly, as shown in FIG. 9C, the abnormality detection threshold value setting unit 14 sets the abnormality detection threshold value “dTMLMT1” with “TmCMP0” as a reference. In this case, “dTMLMT1” = “dTMLMT0−TmCMP0”.

  Since the subsequent movements are as described in the first embodiment, the description thereof is omitted here.

  As described above, according to the second embodiment, it is an elevator having a high fluctuation rate of the rope weight compensation torque by setting the abnormality detection threshold in consideration of the rope weight compensation torque according to the car position. In addition, the abnormality of the guide rails 30a and 30b can be detected with high accuracy from the torque change.

(Third embodiment)
Next, a third embodiment of the present invention will be described.

  In the first and second embodiments, when the guide rails 30a and 30b are detected from the torque change, only that fact is notified. In the third embodiment, the position where the abnormality is detected is the car position. This is specifically stored in association with the.

  FIG. 10 is a block diagram illustrating a configuration example of an elevator control device according to the third embodiment of the present invention. In FIG. 10, the same reference numerals are given to the same parts as those in FIG. 1 in the first embodiment, and the description thereof will be omitted.

  10 is different from the configuration of FIG. 1 in that an abnormality detection position storage unit 19 is added. The abnormality detection position storage unit 19 stores the abnormality associated with the position of the car 8 detected by the car position detection unit 10 when the abnormality determination unit 15 detects an abnormality in the guide rails 30a and 30b. That is, the abnormality detection position storage unit 19 manages the position where the abnormality is detected by the car position.

  That is, in the first or second embodiment, when the abnormality determination unit 15 detects an abnormality in the guide rails 30a and 30b, the inspector outputs the LED on the display unit 18 or the buzzer output unit 17. The number of buzzer sounds and the approximate position can be found. However, when the inspector actually checks the cause of the abnormality such as the level difference between the joints 31a and 31b of the guide rails 30a and 30b, the scratches or the dents on the rails, the inspector gets on the car 8 and in the “inspection operation mode”. In order to work while moving 8, it is necessary to inform the specific position.

  Therefore, in the third embodiment, when the abnormality determination unit 15 detects an abnormality in the guide rails 30a and 30b, the abnormality detection signal is sent to the car position detection unit 10 to detect the car position at that time. The car position detected by the unit 10 is stored in the abnormality detection position storage unit 19 as position information for abnormality detection.

  When the car 8 travels in the “inspection operation mode”, the car position detected by the car position detection unit 10 matches the car position stored in the abnormality detection position storage unit 19 or within a specified range (for example, When the error is within ± 15 cm, the abnormality detection position storage unit 19 sends an output command to the buzzer output unit 17 or the display unit 18 to notify the inspector who is inspecting the abnormality detection position. To.

The operation of the third embodiment will be described with reference to FIG. 11 and FIG.
FIG. 11 is a flowchart showing the processing operation during the diagnostic operation of the elevator in the third embodiment.

  When the “diagnostic operation mode” is selected by the operation mode selection unit 16 (Yes in step S21), the car 8 moves to the farthest floor (the lowermost floor or the uppermost floor) (steps S22 and S23). The diagnostic operation is started from (Step S24). In this diagnostic operation, the car 8 is traveled one way or reciprocally at a constant speed (step S25), and the amount of change in torque command during that time is monitored (step S26).

  Here, during steady running, the amount of change in the torque command exceeds the threshold “dTMLMT1” calculated by the rope self-weight compensation torque setting unit 11 and taking into account the compensation torque “TmCMP0” (Yes in step S26), and the state is When the operation continues for a predetermined time “TIM0” or more (Yes in step S27), the abnormality determination unit 15 determines that there is an abnormality in the guide rails 30a and 30b, and a notification to that effect is sent through the buzzer output unit 17 or the display unit 18. This is done (step S28).

  At this time, the position of the car 8 is detected by the car position detection unit 10 (step S29), and the position is stored in the abnormality detection position storage unit 19 as position information of the abnormality detection (step S30). The same process is repeated until the diagnosis operation is completed (step S29).

  FIG. 12 is a flowchart showing a processing operation during an elevator inspection operation in the third embodiment.

  When the “inspection operation mode” is selected by the operation mode selection unit 16 (step S31), the car 8 moves at a low speed in the upward or downward direction (step S32).

  Here, when the abnormality detection position is stored in the abnormality detection position storage unit 19 (Yes in step S33), the car position detection unit 10 detects the current car position as the car 8 moves. (Step S34) is compared with the abnormality detection position stored in the abnormality detection position storage unit 19 (Step S35). As a result, when the current car position coincides with the abnormality detection position or falls within the specified range (Yes in step S35), an LED is turned on by the display unit 18 or a buzzer output unit 17 outputs a buzzer sound. It is notified that the car 8 has reached the abnormality detection position (step S36).

  As described above, according to the third embodiment, the information on the car position when the abnormality of the guide rails 30a and 30b is detected is stored, and when the car 8 is inspected, the LED at the corresponding position is stored. A lighting or buzzer sound is output. Therefore, when the inspector gets on the car 8 and inspects the guide rails 30a and 30b, the abnormal part can be easily found only by moving the car 8.

  Here, the “inspection operation mode” has been described as an example. However, even when the car 8 is operating normally in the “normal operation mode”, the car 8 is stored in the abnormality detection position storage unit 19 as described above. Notification may be made when the stored abnormality detection position is reached.

  In addition, as described in the first embodiment, since guide rails 32a and 32b are actually provided for the counterweight 9 (see FIG. 7), when an abnormality is detected from a torque change, , I do not know which guide rail of the car 8 or the counterweight 9 is the cause.

  Therefore, when an abnormality is detected by the abnormality determination unit 15, in addition to the position of the car 8 at that time, the position of the counterweight 9 is also stored in the abnormality detection position storage unit 19 as information of the abnormality detection position. And In this case, since the position of the counterweight 9 is in a relative relationship with the position of the car 8, it can be easily obtained by calculation.

  FIG. 13 shows an example when the car position and the counter weight position are stored in the abnormality detection position storage unit 19. P11 and P12 in the figure are the position information of the car 8 detected in the “diagnostic operation mode”, and P21 and P22 are the position information of the counterweight 9 corresponding to the car position. When the distance from the lowest floor to the highest floor of the car 8 is L, P21 = L−P11 and P22 = L−P12.

  As a result, in the “inspection operation mode”, in addition to P11 and P12, when the car 8 comes to a position corresponding to P21 and P22, LED lighting or a buzzer sound is output. Therefore, even if there is an abnormality in the guide rails 32a and 32b provided on the counterweight 9 side, the abnormal part can be easily found and inspected.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described.

  In the fourth embodiment, the car 8 is automatically moved to the abnormality detection position stored in the abnormality detection position storage unit 19.

  FIG. 14 is a block diagram illustrating a configuration example of an elevator control device according to the fourth embodiment of the present invention. In FIG. 14, the same components as those in FIG. 10 in the third embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  14 is different from the configuration of FIG. 10 in that an automatic movement mode selection unit 20 is added. The automatic movement mode selection unit 20 is provided in the machine room together with, for example, the operation mode selection unit 16 and includes a switch, a button, and the like, and selects “automatic movement mode” as the operation mode of the elevator. The “automatic movement mode” is a mode for automatically moving the car 8 to the abnormality detection position stored in the abnormality detection position storage unit 19.

  In the example of FIG. 14, the operation mode selection unit 16 and the automatic movement mode selection unit 20 are provided separately, but each mode can be arbitrarily selected including the “automatic movement mode” in the operation mode selection unit 16. Anyway.

  In such a configuration, when an abnormality is detected in the guide rails 30a and 30b due to the movement of the car 8 in the “diagnostic operation mode”, that fact is notified by an LED display or a buzzer sound, and the abnormality detection position memory is stored. The position of the car 8 at that time is stored in the unit 19 as an abnormality detection position. In the “inspection operation mode”, when the car 8 comes to the abnormality detection position stored in the abnormality detection position storage unit 19, the fact is notified by an LED display or a buzzer sound.

  Here, in the fourth embodiment, the car 8 can be automatically moved to the abnormality detection position stored in the abnormality detection position storage unit 19 in order to further increase the work efficiency. Specifically, when the worker selects the “automatic movement mode” with the automatic movement mode selection unit 20, information on the car position stored as the abnormality detection position in the abnormality detection position storage unit 19 is given to the speed command unit 1. . As a result, the speed command unit 1 outputs a speed command for moving the car 8 at a predetermined speed to the abnormality detection position to the speed control unit 2. In this case, since a worker under inspection is on the car 8, the car 8 is moved slowly at a low speed.

  As described above, in the fourth embodiment, since the car 8 can be automatically moved to the abnormality detection position, it is possible to increase work efficiency when an operator checks an abnormal part.

  As described above, when the inspection including the abnormality of the guide rails 32a and 32b of the counterweight 9 is performed, the position of the counterweight 9 corresponding to the car position where the abnormality is detected is also stored as the abnormality detection position. Stored in the unit 19 (see FIG. 13). Accordingly, when the “automatic movement mode” is selected, the car 8 moves to both the position where the abnormality is detected and the position of the counterweight 9 corresponding to the car position.

(Fifth embodiment)
Next, a fifth embodiment of the present invention will be described.

  In the fifth embodiment, when an abnormality of the guide rail is detected, it can be confirmed whether or not the cause is a joint.

  FIG. 15 is a block diagram illustrating a configuration example of an elevator control device according to the fifth embodiment of the present invention. In FIG. 15, the same parts as those in FIG. 14 in the fourth embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  15 is different from the configuration of FIG. 14 in that a joint position storage unit 21 and a comparison unit 22 are added. The joint position storage unit 21 stores position information of the joints 31a and 31b of the rail members constituting the guide rails 30a and 30b of the car 8. The comparison unit 22 is stored in the car position and seam position storage unit 21 detected by the car position detection unit 10 when the change amount of the torque command exceeds the threshold value and the abnormality of the guide rails 30a and 30b is detected. The position information of the joints 31a and 31b is compared, and a notification attribute is attached to the car position according to the comparison result, and the abnormality detection position storage unit 19 stores the notification attribute.

  In such a configuration, when the abnormality of the guide rails 30a and 30b is detected by the movement of the car 8 in the “diagnostic operation mode”, the position of the car 8 detected by the car position detection unit 10 is set as the abnormality detection position. It is stored in the abnormality detection position storage unit 19.

  At that time, in the fourth embodiment, the car position detected by the car position detection unit 10 and the position information of the joints 31a and 31b stored in the joint position storage unit 21 are compared by the comparison unit 22, and an abnormality is detected. It is determined whether the cause of the detection is due to the joints 31a and 31b or not.

That is, now, when the length of each rail member constituting the guide rails 30a and 30b is uniform and d [m], and the total length of the guide rails 30a and 30b that need to be installed is L [m],
L = α × d + β (3)
It becomes. Α is an integral number of rail members of d [m], and if L [m] cannot be divided by d [m], another rail member having a length of d [m] or less is required. Become. Let this length be β [m].

  Here, when the guide rails 30a and 30b are installed, if the rail member having the length β [m] is the endmost and uppermost floor side, the position X [ m] can be expressed as follows.

X (m) = m × d (m = 1, 2, 3..., Α) (4)
Further, if the rail member having the length β [m] is the endmost and the lowermost floor side, the position X [m] of the joints 31a and 31b of the guide rails 30a and 30b can be expressed as follows.

X (n) = n × d + β (n = 0, 1, 2,..., Α) (5)
Depending on the installation method of the guide rails 30a and 30b, the position information of the joints 31a and 31b of the guide rails 30a and 30b is obtained by the above formula (4) or (5) and stored in the joint position storage unit 21. .

  Then, the car position detected by the abnormality detection position storage unit 19 is compared with the position information of the joints 31a and 31b stored in the joint position storage unit 21, and they match or are within a specified range (for example, within about ± 10 cm). If so, it is determined that there is an abnormality in the joints 31a and 31b. If they do not match within the specified range, it is determined that there is an abnormality other than the joints 31a and 31b.

  Here, when the car position when the abnormality is detected is stored in the abnormality detection position storage unit 19, the result of the comparison unit 22 is reflected. That is, when it is determined that there is an abnormality in the joints 31a and 31b, a notification attribute to that effect is added and stored in the abnormality detection position storage unit 19. When an output command is sent from the abnormality detection position storage unit 19 to the display unit 18 and the buzzer output unit 17, it is possible to determine whether the abnormality is a seam abnormality or other abnormality based on the notification attribute.

  For example, in the case of a seam abnormality, the output command is flickered, and the LED display or buzzer sound is output intermittently, so that the inspector is informed of the cause of the abnormality.

  As described above, according to the fifth embodiment, when the abnormality of the guide rails 30a and 30b is notified, it is possible to distinguish and notify whether or not the cause is the joints 31a and 31b. This is convenient when it is desired to check the presence or absence of a step between the joints 31a and 31b of 30a and 30b.

  As described above, when the inspection including the abnormality of the guide rails 32a and 32b of the counterweight 9 is performed, the position of the counterweight 9 corresponding to the car position where the abnormality is detected is also stored as the abnormality detection position. Stored in the unit 19 (see FIG. 13).

  At this time, in addition to the information on the joint positions of the guide rails 30a and 30b of the car 8, the information on the joint positions of the guide rails 32a and 32b of the counterweight 9 can be stored in the joint position storage unit 21. For example, by comparing the stored position information with the counter weight position corresponding to the car position where the abnormality is detected, it can be determined whether the cause of the abnormality is the joints 33a and 33b. If it is determined that the joint is abnormal, a notification attribute to that effect is added to the counter weight position (P21, P22 in FIG. 13) and stored in the abnormality detection position storage unit 19, and the guide rail abnormality of the car 8 is detected. LED display or buzzer sound output is performed in distinction.

  In each of the above embodiments, the LED is turned on by the display unit 18. However, a message for notifying abnormality may be displayed. Further, the buzzer output unit 17 is not limited to outputting a buzzer sound, and may be configured to output a sound for notifying abnormality.

  In short, the present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the components without departing from the scope of the invention in the implementation stage. Moreover, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

  DESCRIPTION OF SYMBOLS 1 ... Speed command part, 2 ... Speed control part, 3 ... Current control part, 4 ... Current detector, 5 ... Motor, 6 ... Speed detection part, 7 ... Sheave, 7a ... Rope, 8 ... Ride car, 9 ... Counter Weight 10, car position detection unit 11, rope self-weight compensation torque setting unit 12 torque command detection unit 13 torque command change amount detection unit 14 abnormality detection threshold setting unit 15 abnormality determination unit 16 Operation mode selection unit, 17 ... buzzer output unit, 18 ... display unit, 19 ... abnormality detection position storage unit, 20 ... automatic movement mode selection unit, 21 ... joint position storage unit, 22 ... comparison unit, 30a, 30b ... car Guide rails, 31a, 31b, joints, 32a, 32b, counterweight guide rails, 33a, 33b, joints.

Claims (7)

A motor for driving the car,
Torque command detecting means for detecting a torque command value given to the motor during operation of the car;
Torque command change amount detection means for detecting a change amount of the torque command value detected by the torque command detection means;
Threshold setting means for setting an abnormality detection threshold for the change amount of the torque command value detected by the torque command change amount detection means;
An abnormality determination unit that determines that there is an abnormality in the guide rail that supports the car when the amount of change in the torque command value exceeds a threshold set by the threshold setting unit;
An elevator control apparatus, comprising: a notification means for notifying that when the abnormality of the guide rail is detected by the abnormality determination means.   The abnormality determination means has an abnormality in the guide rail that supports the car when a state in which the amount of change in the torque command value exceeds the threshold set by the threshold setting means continues for a preset time. The elevator control device according to claim 1, wherein: Car position detecting means for detecting the position of the car;
Compensation torque setting means for setting a compensation torque for compensating the own weight of the rope based on the car position information detected by the car position detection means,
The elevator control apparatus according to claim 1, wherein the threshold value setting means sets a threshold value for abnormality detection in consideration of the compensation torque set by the compensation torque setting means. Car position detecting means for detecting the position of the car;
Storage means for storing the position of the car detected by the car position detection means as an abnormality detection position when an abnormality of the guide rail is detected by the abnormality determination means;
2. The elevator control apparatus according to claim 1, wherein the notifying means notifies that the car has come to an abnormality detection position stored in the storage means during operation of the car. Car position detecting means for detecting the position of the car;
An abnormality detection position storage means for storing the position of the car detected by the car position detection means as an abnormality detection position when an abnormality of the guide rail is detected by the abnormality determination means;
2. The elevator control apparatus according to claim 1, wherein the car is moved to an abnormality detection position stored in the storage means in accordance with selection of a specific operation mode. Car position detecting means for detecting the position of the car;
First storage means for storing the position of the car detected by the car position detection means as an abnormality detection position when an abnormality of the guide rail is detected by the abnormality determination means;
Second storage means for storing position information of the joint of the guide rail;
The abnormality detection position stored in the first storage means and the position information of the guide rail joint stored in the second storage means are compared to determine whether the cause of the abnormality is the guide rail joint. Comparing means for
2. The elevator control device according to claim 1, wherein when the comparison means determines that the cause of the abnormality is a joint of the guide rail, the notification means distinguishes from the abnormality other than the joint. .   The notifying means performs abnormality notification by emitting light or outputting a buzzer sound. When the comparing means determines that the cause of the abnormality is a joint of the guide rail, the light emitting body. The elevator control device according to claim 6, wherein the flashing light or the buzzer sound is intermittently output.

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