JP6295189B2 - Elevator equipment - Google Patents

Description

  The present invention relates to an elevator apparatus including a first governor that detects an overspeed during an ascending operation and a second governor that detects an overspeed during a descending operation.

  In recent years, the speed and length of the elevator apparatus have been increased due to the increase in the number of buildings. In such an elevator apparatus, a sudden change in atmospheric pressure occurs due to the raising and lowering of the car, and the passengers become deaf. Gives a feeling of ear closure. Since the human ear is more adaptable to the side where the air pressure decreases, i.e. when the car rises, than the side where the air pressure increases, i.e. when the car descends, the rated speed in the downward direction is lower than the rated speed in the upward direction. There is a need for an elevator device that is set low and reduces the feeling of ear closure. And as such an elevator apparatus, the elevator apparatus described in patent document 1, for example is disclosed.

  Patent Document 1 states that “a speed control rope connected to a lifting body, a sheave that is fixed to a horizontal shaft and wound with a speed control rope, and a rotational speed of the sheave is adjusted so A first speed governor for detecting the speed, and a second speed governor that is connected to the horizontal shaft and the clutch, adjusts the rotational speed of the sheave during the descending operation of the elevating body, and detects the descending overspeed. And the clutch transmits the rotation of the sheave to the rotating body of the second governor during the descending operation of the elevator, and the sheave to the second governor during the ascending operation of the elevator. An elevator apparatus that releases transmission of the rotation of the elevator apparatus, further comprising a rotation prevention mechanism that prevents rotation of the rotating body of the second governor during the ascending operation of the elevating body. " Is described.

International Publication No. 2014/125574

  The elevator apparatus described in Patent Literature 1 can set and detect an overspeed according to the driving direction (traveling direction) of the lifting body. However, the elevator apparatus described in Patent Document 1 has not been sufficiently studied for a failure of a clutch that is a mechanism for transmitting or releasing the rotation of the sheave to the rotating body of the second governor.

  The present invention includes a first speed governor that detects an overspeed during an ascending operation and a second speed governor that detects an overspeed during a descending operation, and secondly rotates the sheave via a clutch. It is an object of the present invention to detect a clutch failure in an elevator apparatus that transmits or releases the governor.

  An elevator apparatus according to one aspect of the present invention includes a speed control rope connected to a lifting body, a sheave fixed to a horizontal shaft and wrapped around the speed control rope, and a speed of the sheave. A first speed governor that detects the overspeed of the lifting body, and a second speed controller that speeds the rotational speed of the sheave during the descending operation of the lifting body and detects the downward speed of the lifting body The horizontal shaft is connected to the second speed governor, the rotation of the sheave is transmitted to the rotating body of the second speed governor during the lowering operation of the lifting body, and the second speed control is performed during the lifting operation of the lifting body. A clutch for releasing transmission of the rotation of the sheave to the rotating body of the machine. In addition, a rotation detection sensor that detects rotation of the horizontal axis and outputs a first detection signal, a rotation detection plate that rotates in synchronization with the rotating body of the second governor, and rotation of the rotation detection plate And a failure detection sensor that outputs a second detection signal accordingly. Furthermore, the control part which receives the 1st detection signal output from the sensor for rotation detection, and receives the 2nd detection signal output from the sensor for failure detection is provided. Then, the control unit determines the rotation / non-rotation of the rotation detection plate using the second detection signal, and determines the clutch from the determination result and the traveling direction of the lifting body calculated based on the first detection signal. The control part which determines normal / abnormal of is provided.

According to the present invention, it is possible to accurately detect the failure of the clutch that transmits or releases the rotation of the sheave to the second governor.
Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

It is sectional drawing which shows the outline of the structural example of the elevator apparatus with which this invention is applied. It is sectional drawing of the speed governor which concerns on 1st Embodiment of the elevator apparatus with which this invention is applied. It is a side view which shows the principal part of the governor shown in FIG. It is a top view of the principal part of the governor shown in FIG. It is a top view which shows the factor of malfunctioning generation | occurrence | production in the principal part of the governor shown in FIG. It is a figure which shows the detection plate speed detection characteristic and encoder speed detection characteristic at the time of the descent | fall operation | movement of the elevator apparatus with which this invention is applied. It is a block diagram which shows the outline of the structural example of the control system of the elevator apparatus with which this invention is applied. It is a flowchart which shows an example of the failure detection processing procedure by the control system of the elevator apparatus with which this invention is applied. It is a top view of the principal part of the speed governor which concerns on 2nd Embodiment of the elevator apparatus with which this invention is applied. It is sectional drawing of the speed governor which concerns on 3rd Embodiment of the elevator apparatus with which this invention is applied.

Hereinafter, an example of an embodiment for carrying out the present invention will be described with reference to the accompanying drawings. The description will be given in the following order. In addition, in each figure, the same code | symbol is attached | subjected to the component which has the substantially same function or structure, and the overlapping description is abbreviate | omitted.
1. First Embodiment (Failure detection device: Example of detecting rotation of a semicircular rotation detection plate)
2. Second embodiment (rotation detection plate: an example in which a semicircular hole is formed in a disk)
3. Third Embodiment (Example in which a clutch is provided on the second roller on the second governor side)

<1. First Embodiment>
The elevator apparatus according to the embodiment of the present invention introduces an electronic safety system using an electronic safety controller 200 (see FIG. 7) described later. In addition, in order to detect the elevator traveling speed, more specifically, the traveling speed (moving speed / lifting speed) of a lifting body called a car, a sheave around which a speed control rope is wound is fixed. A rotation detecting sensor for detecting the rotation of the horizontal axis.

  Before describing the details of the elevator apparatus according to the present embodiment, a specific configuration example of the elevator apparatus to which the present invention is applied will be described below.

[Configuration of elevator equipment]
FIG. 1 is a cross-sectional view showing an outline of a configuration example of an elevator apparatus to which the present invention is applied.

  In general, an elevator apparatus connects a lifting body (car) 1 and a counterweight 2 with a main rope (main rope) 3 in a hoistway 102 provided in a building 100, and the lifting body 1 is a guide rail 5a. , 5b can be moved up and down. A machine room 101 is provided above the hoistway 102.

  In the machine room 101, a hoisting machine 4 around which the main rope 3 is wound, a control panel 103 for controlling the hoisting machine 4 and the like, a speed governor 10, and the like are arranged. The speed governor 10 includes an endless speed regulating rope 8 that is stretched over the entire travel stroke (lifting stroke) of the lifting body 1 in the hoistway 102. The governing rope 8 is wound around a sheave 9 a installed in the machine room 101 and a sheave 9 b of a governor weight installed at the lower part of the hoistway 102. The sheave 9 a is rotatably attached to the building 100. The sheave 9 a of the speed governor 10 is a rotating body that rotates in conjunction with the traveling of the elevating body 1. The elevating body 1 and the speed control rope 8 are connected by a connecting member 7.

  The lifting body 1 is provided with an emergency stop device 6 that holds the guide rails 5a and 5b with wedges in an emergency to stop the traveling of the lifting body 1, and an operating lever (not shown) that drives the emergency stop device 6. Yes. The operating lever is pivotally supported on the lifting body 1 side and is provided in contact with the speed-control rope 8.

[Configuration of governor]
Next, the structure of the speed governor which concerns on 1st Embodiment of the elevator apparatus with which this invention is applied is demonstrated.

FIG. 2 is a cross-sectional view of the speed governor 10 of the elevator apparatus shown in FIG.
As shown in FIG. 2, a speed control rope 8 disposed in the hoistway 102 and connected to the lifting body 1, a sheave 9 a fixed to the horizontal shaft 12 and wound around the speed control rope 8, The sheave 9a is connected to the first speed governor 13 that regulates the rotational speed of the sheave 9a and detects the overspeed, and the horizontal shaft 12 and the clutch 17. The second speed governor 15 that regulates the rotational speed of the motor and detects the descending overspeed, and the rotary encoder 19 attached to the horizontal shaft 12 are provided. The first speed governor 13 and the second speed governor 15 can adopt the same configuration as that of Patent Document 1 (Japanese Patent Laid-Open No. 2013-151337) as an example.

  For example, the horizontal shaft 12 is supported by frames 11R and 11L provided on a partition wall between the machine room 101 and the hoistway 102 via a bearing. A rotating body 16 of the first governor 13 is fixedly provided near one side end of the horizontal shaft 12, and a rotating body 18 of the second governor 15 is disposed near the other side end of the horizontal shaft 12. It is attached via a clutch 17.

  As the clutch 17, for example, a cam type one-way clutch (force clutch) is used, an inner ring 17 a of the clutch 17 is fixed to the horizontal shaft 12, and an outer ring 17 b is fixed to the rotating body 18. The clutch 17 transmits the rotation of the sheave 9 a to the rotating body 18 of the second governor 15 during the lowering operation of the lifting body 1, and the second governor 15 is transmitted to the second governor 15 during the ascending operation of the lifting body 1. The transmission of the rotation of the sheave 9a is released.

  A rotary encoder 19, which is an example of a speed sensor that electrically measures the traveling speed of the lifting body 1, is attached to the other side end of the horizontal shaft 12. The rotary encoder 19 is an example of a rotation detection sensor, and converts a mechanical displacement amount in the rotation direction of the horizontal shaft 12 into a digital amount. An output signal (first detection signal) of the rotary encoder 19 is supplied to an electronic safety controller 200 (see FIG. 7) described later, which is a control unit provided in the control panel 103.

  In the elevator apparatus according to the present embodiment, the rotary encoder 19 is attached to the sheave 9a. However, the present invention is not limited to this. Similarly to the sheave 9 a, the rotary encoder 19 may be attached to the sheave 9 b of the governor weight that is a rotating body that rotates in conjunction with the traveling of the elevating body 1. However, since the wiring for transmitting the output signal of the rotary encoder 19 to the control panel 103 can be shortened when the rotary encoder 19 is attached to the sheave 9a than when the rotary encoder 19 is attached to the sheave 9b, the influence of noise on the wiring is suppressed. It is advantageous.

  The first speed governor 13 includes a rotating body 16 fixed near one side end of the horizontal shaft 12 and a pendulum (not shown) attached to the rotating body 16 and displaced in accordance with the rotational speed of the rotating body 16. ). When the lifting speed of the lifting body 1 detected by the rotary encoder 19 reaches, for example, 1.3 times the rated speed, the first speed governor 13 moves up and down in the first speed governor 13 by the displacement of the pendulum. The stop switch is turned on. With this configuration, the first speed governor 13 detects that the lifting speed of the lifting body 1 has reached 1.3 times the rated speed.

  The second speed governor 15 is attached to the rotating body 18 via a clutch 17 fixed to the other side end of the horizontal shaft 12, and is attached to the rotating body 18. It has a pendulum (not shown) that is displaced accordingly. In the second speed governor 15, when the lifting speed of the lifting body 1 detected by the rotary encoder 19 reaches 1.3 times the rated speed, for example, the lifting body in the second speed governor 15 is caused by the displacement of the pendulum. The stop switch is turned on. With such a configuration, the second speed governor 15 detects that the lifting speed of the lifting body 1 has reached 1.3 times the rated speed.

  As described above, the first rated speed or the second rated speed of the lifting body 1 is determined by inserting the lifting body stop switch in the first speed governor 13 or the lifting body stop switch in the second speed governor 15. You can see that it has reached 1.3 times. Specifically, as the first governor 13 and the second governor 15, for example, a flyway saddle governing mechanism as described in JP 2000-327241 A can be used. It is not limited to.

  The elevator apparatus according to the present embodiment sets the rated speed in the descending direction lower than the rated speed in the ascending direction in order to reduce the ear-closed feeling in which the passenger's ears become tight due to a sudden change in atmospheric pressure due to the lifting and lowering of the lifting body 1. It is. In response to this, when the first speed governor 13 for ascending is detected that the elevating speed of the elevating body 1 has reached 1.3 times the rated speed in the ascending direction, the first governor 13 that drives the elevating body 1 The power source of the upper machine 4 and the power source of the control panel 103 that controls the hoisting machine 4 are shut off.

  On the other hand, when the second speed governor 15 for lowering detects that the lifting speed of the lifting body 1 has reached 1.3 times the rated speed in the lowering direction, the hoist 4 that drives the lifting body 1. And the power source of the control panel 103 that controls the hoisting machine 4 are shut off. Further, when the lowering speed of the lifting body reaches 1.4 times the rated speed for some reason, the second speed governor 15 operates the emergency stop device 6 provided on the lifting body 1 to move up and down. The body 1 is mechanically emergency-stopped. That is, when it is detected that the pendulum attached to the rotating body 18 is further displaced, the speed adjusting rope 8 is sandwiched by a mechanism (not shown) to stop the movement of the speed adjusting rope 8. Then, the emergency stop device 6 is operated by an operating lever (not shown) connected to the speed adjusting rope 8 that has stopped moving, and the guide rails 5a and 5b are gripped by the emergency stop device 6 so that the lifting body 1 is moved. Emergency stop mechanically.

  Thus, in order to detect the predetermined overspeed in the upward direction and to detect the predetermined overspeed in the downward direction, the first speed governor 13 for increasing and the second speed governor 15 for decreasing. The speed setting value is set to a different value.

[Configuration of failure detection device]
Next, a configuration for detecting a failure of the clutch 17 provided in the second speed governor 15 of the elevator apparatus to which the present invention is applied will be described.

  As shown in FIG. 2, the elevator apparatus according to the present embodiment is different from the failure detection means based on overspeed monitoring using the rotary encoder 19, and detects a failure of the clutch 17 of the second governor 15. A detection device 30 is provided.

  The failure detection device 30 is arranged so as to face the first roller 20 provided coaxially with the second speed governor 15 on the same virtual plane in the vicinity of the second speed governor 15. A roller 21 and a transmission system 22 such as a belt wound around the first roller 20 and the second roller 21 are provided. Further, the failure detection device 30 includes a rotation detection plate 23 that is attached to the flat portion of the second roller 21 and rotates in synchronization with the second roller 21, and a failure detection sensor 24 that detects the rotation of the rotation detection plate 23. It has.

  The first roller 20 is fixed to the rotating body 18 or the outer ring 17 b of the clutch 17 and rotates together with the rotating body 18. The second roller 21 is rotatably supported by the base 25 via a shaft 25a. The pedestal 25 is fixed to the frame 11L. When the first roller 20 rotates, the rotation of the second roller 21 is transmitted via the transmission system 22 and rotates in synchronization with the first roller 20.

[Arrangement relationship between rotation detection plate 23 and failure detection sensor 24]
Next, the arrangement relationship between the rotation detection plate 23 and the failure detection sensor 24 will be described.
FIG. 3 is a side view showing a main part of the speed governor 10 shown in FIG.
FIG. 4 is a plan view of a main part of the governor 10 shown in FIG.

  As shown in FIG. 3, the failure detection sensor 24 has a U-shaped structure that sandwiches the rotation detection plate 23 with a gap therebetween, and has an output side 24a and an input side 24b at both ends on the open side. The failure detection sensor 24 detects that the rotation detection plate 23 is in a rotating state when, for example, the rotation detection plate 23 blocks a signal from the output side 24a to the input side 24b. The failure detection sensor 24 outputs a digital output signal (second detection signal) at a predetermined cycle (time interval). For example, the output signal is in an on state when a signal is input to the input side 24b, and is in an off state when no signal is input.

  As shown in FIG. 4, the rotation detection plate 23 is a semicircle (an example of a semicircular shape portion). The center of the diameter of the semicircular rotation detection plate 23 is the center of rotation and coincides with the rotation axis of the second roller 21. In the present embodiment, the rotation detection plate 23 is semicircular, but the shape of the circle is not limited to this example. For example, the length of the arc may be a quarter circle that is a quarter of the circle. The shape of the rotation detection plate may be any configuration as long as the signal emitted from the output side 24a of the failure detection sensor 24 can be periodically and repeatedly detected according to the rotation of the rotation detection plate.

  As the failure detection sensor 24, sensors having various configurations can be employed. For example, when the failure detection sensor 24 is configured as a transmissive photoelectric type, the output side 24a is a light projecting unit and the input side 24b is a light receiving unit. Each time the rotation detection plate 23 makes a half rotation (180 ° rotation), the light emitted from the light projecting unit to the light receiving unit is blocked by the rotation detection plate 23, and the signal output from the failure detection sensor 24 is turned on / off. Off switches. The rotation of the rotation detection plate 23 can be detected based on the switching (on / off) of the output signal. When the failure detection sensor 24 is configured as a reflective photoelectric type, a light projecting unit and a light receiving unit are disposed on the input side 24b.

  Further, when the failure detection sensor 24 is configured as a proximity type, the rotation detection plate 23 is configured with a magnetic material, and a magnetic sensor such as a Hall IC is disposed on the input side 24b. When the magnetic sensor on the input side 24b senses the proximity of the rotation detection plate 23 from the change in magnetism, the rotation of the rotation detection plate 23 can be detected.

  Further, when the failure detection sensor 24 is a displacement type, for example, a detection member that contacts the rotation detection plate 23 is provided, and the displacement of the distance is detected by the presence or absence of contact between the detection member and the rotation detection plate 23, The rotation of the rotation detection plate 23 can be detected.

  In FIG. 4, a detection point 26 of the failure detection sensor 24 is a position where the rotation detection plate 23 is actually detected, and is arranged at a point where signal input / output is performed or on the input side 24b or the like. It corresponds to the center of the sensor. For example, in the photoelectric failure detection sensor 24, the detection point 26 corresponds to the optical axis L of the light emitted from the light projecting unit or the center of the light receiving surface of the light receiving unit. The contact type failure detection sensor 24 corresponds to a contact point between a detection member (not shown) and the rotation detection plate 23.

  The electronic safety controller 200 (see FIG. 7) provided in the electronic safety system detects the rotation of the rotation detection plate 23 fixed to the second roller 21 rotating in synchronization with the rotation of the second governor 15 for failure detection. Monitoring is performed using the sensor 24. The electronic safety controller 200 detects normality / abnormality of the clutch 17 using the output signal (second detection signal) of the failure detection sensor 24 and the output signal (first detection signal) of the rotary encoder 19. .

  By the way, such a failure detection method using the rotation detection plate 23 and the failure detection sensor 24 has high reliability, but the output signal of the failure detection sensor 24 is unstable depending on the stop position of the elevator 1. become.

FIG. 5 is a plan view showing the cause of malfunction in the main part of the governor 10 shown in FIG.
Here, as shown in FIG. 5, it is assumed that the end of the rotation detection plate 23 is stopped in the vicinity of the detection point 26 of the failure detection sensor 24. In the state shown in FIG. 5, when vibration of the lifting body 1 or the like is applied to the second roller 21, the rotation detection plate 23 shakes, and a signal emitted from the output side 24 a of the failure detection sensor 24 is used as the rotation detection plate 23. May occur intermittently (hereinafter referred to as “intermittent shielding phenomenon”). When this intermittent shielding phenomenon occurs, the failure detection sensor 24 may detect that the rotation detection plate 23 is rotating. Therefore, it is desirable that the failure detection device 30 can detect an abnormality including the intermittent shielding phenomenon.

[Detection plate speed detection characteristics and encoder speed detection characteristics]
FIG. 6 is a diagram showing a detection plate speed detection characteristic and an encoder speed detection characteristic during the descending operation of the elevator apparatus to which the present invention is applied. In FIG. 6, the horizontal axis represents the moving distance (m) in the descending direction of the lifting body 1, and the vertical axis represents the traveling speed (m / min).

  In FIG. 6, the detection plate speed detection characteristic 27 indicates the relationship between the traveling speed and the moving distance of the lifting body 1 calculated based on the signal output by the failure detection sensor 24 according to the rotation of the rotation detection plate 23. It is shown. The encoder speed detection characteristic 28 indicates the relationship between the traveling speed and the moving distance of the lifting body 1 calculated based on the encoder signal output from the rotary encoder 19.

  As the rotation detection plate 23 rotates, the detection point 26 of the failure detection sensor 24 relatively moves on the rotation detection plate 23, and its locus becomes an arc. The length (movement distance L0) of the semicircular arc 23C that is the locus of the detection point 26 is determined by the distance r (see FIG. 5) from the rotation center of the rotation detection plate 23 to the detection point 26 of the failure detection sensor 24. . Then, from the length of the arc 23C, the diameters of the second roller 21 and the first roller 20, and the like, the number of rotations of the first roller 20 when the rotation detection plate 23 makes a half rotation (180 degree rotation) can be known. The moving distance of the rope 8 (elevating body 1) is obtained. Thus, the length of the arc 23C (movement distance L0) is known, and in the detection plate speed detection characteristic 27, the travel speed is updated every time the lifting body 1 moves a distance corresponding to the movement distance L0.

  As shown in FIG. 6, when the traveling speed of the lifting body 1 is low, the difference (difference d) between the detection plate speed detection characteristic 27 and the encoder speed detection characteristic 28 is large. On the other hand, since the on / off switching of the output signal output from the failure detection sensor 24 frequently occurs as the traveling speed of the elevating body 1 increases, the detection plate speed detection characteristic 27, the encoder speed detection characteristic 28, It can be seen that the detection error is reduced and the detection accuracy is increased. Therefore, it is desirable that the above-described failure detection by the failure detection device 30 is performed at a timing when the traveling speed by the encoder speed detection characteristic 28 is a desired value, for example, 200 m / min. However, it is possible to determine whether the clutch 17 is normal or abnormal by setting other travel speeds in the region 29 having a predetermined width around the desired travel speed as well as the desired travel speed value. Alternatively, an arbitrary traveling speed smaller than the traveling speed described above may be set.

[Control system configuration]
The configuration of the control system of the elevator apparatus to which the present invention is applied will be described.

FIG. 7 is a block diagram showing an outline of a configuration example of a control system of an elevator apparatus to which the present invention is applied.
As shown in FIG. 7, the present control system is configured around an electronic safety controller 200 that is a control unit responsible for overall control of the elevator apparatus to which the present invention is applied. As the electronic safety controller 200, for example, a microcomputer can be used. The electronic safety controller 200 receives the output signal (encoder signal) of the rotary encoder 19 and the output signal of the failure detection sensor 24.

  The rotary encoder 19 is an example of a speed sensor used to electrically measure the traveling speed of the elevating body 1 and outputs an encoder signal obtained by converting a mechanical displacement amount in the rotation direction of the horizontal shaft 12 into a digital amount. To do. This encoder signal includes information on the rotational speed and direction of the horizontal shaft 12.

  The failure detection sensor 24 outputs an output signal according to the presence or absence of the rotation detection plate 23 between the output side 24a and the input side 24b, that is, an output signal according to the rotation state of the rotation detection plate 23.

  In FIG. 7, regarding the electronic safety controller 200, each function of the electronic safety controller 200 is shown as a block diagram and shown as a functional block diagram. The electronic safety controller 200 includes a speed information processing unit 201, a rotation detection counter 202, a non-rotation detection counter 203, a rotation determination unit 204, and a failure determination unit 205. The electronic safety controller 200 includes a memory 206. The memory 206 is a non-volatile memory, and is configured using, for example, a semiconductor memory capable of writing and reading data.

  The speed information processing unit 201 calculates the traveling speed and the traveling direction of the lifting body 1 based on the information about the rotational speed and the rotational direction of the horizontal shaft 12 included in the encoder signal of the rotary encoder 19. Further, the speed information processing unit 201 performs a process of receiving an output signal of the failure detection sensor 24 at a predetermined cycle, and detects rotation / non-rotation of the rotation detection plate 23 based on the output signal. In the present specification, non-rotation means a state in which the rotation detection plate 23 is stopped or is rotating extremely slowly. When the rotation detection plate 23 is in such a state, no change appears in the reception signal (on / off state) of the failure detection sensor 24, and therefore it is detected as non-rotation. Information about the rotation of the rotation detection plate 23 is supplied to the rotation detection counter 202, and information about the non-rotation is supplied to the non-rotation detection counter 203. Further, the speed information processing unit 201 calculates the traveling speed of the lifting body 1 based on the encoder signal of the rotary encoder 19.

  The speed information processing unit 201 compares the current (latest) traveling speed of the lifting body 1 calculated based on the output signal of the failure detection sensor 24 with the traveling speed of the lifting body 1 calculated last time. When the current traveling speed is different from the previously calculated traveling speed, it is determined that the rotation detection plate 23 is rotating. Here, the previous travel speed is a past travel speed obtained in a state before the half rotation from the state of the rotation detection plate 23 where the current (latest) travel speed is calculated. In the following description, the “current traveling speed” of the lifting body 1 may be referred to as “current traveling speed”.

  Further, the speed information processing unit 201 calculates the traveling speed of the lifting body 1 calculated this time based on the output signal of the failure detection sensor 24 and the traveling speed of the lifting body 1 calculated based on the encoder signal of the rotary encoder 19. It is determined whether the difference is less than or equal to a predetermined threshold value. The determination result is supplied to the rotation detection counter 202 or the non-rotation detection counter 203.

  In the electronic safety controller 200, the speed information processing unit 201 calculates the traveling speed of the elevator 1 based on each of the encoder signal of the rotary encoder 19 and the output signal of the failure detection sensor 24. I can't. A speed information processing unit for the rotary encoder 19 and a speed information processing unit for the failure detection sensor 24 may be provided separately.

  When rotation information is supplied from the speed information processing unit 201, the rotation detection counter 202 increases the count value by 1 (counts up) and supplies the count value to the rotation determination unit 204. The rotation detection counter 202 is reset when the count value becomes a predetermined value (for example, 8) or more.

  When non-rotation information is supplied from the speed information processing unit 201, the non-rotation detection counter 203 increases the count value by 1 (counts up) and supplies the count value to the rotation determination unit 204. The non-rotation detection counter 203 is reset when the count value becomes a predetermined value (for example, 8) or more. The rotation detection counter 202 and the non-rotation detection counter 203 also reset their own detection counter when the other detection counter performs a reset operation.

  The rotation determination unit 204 determines whether the rotation detection plate 23 is rotated or not rotated based on whether or not the count value of either the rotation detection counter 202 or the non-rotation detection counter 203 is less than a predetermined value (for example, 8). judge. The determination result is supplied to the failure determination unit 205. The above-described reset operation of the rotation detection counter 202 and the non-rotation detection counter 203 may be performed by the rotation determination unit 204 outputting a reset command.

  The failure determination unit 205 is based on the determination result about the rotation or non-rotation of the rotation detection plate 23 supplied from the rotation determination unit 204 and the traveling direction information of the elevator 1 supplied from the speed information processing unit 201. Then, it is determined whether the clutch 17 is normal or abnormal. Specifically, the failure determination unit 205 determines that the clutch 17 is in the case where the elevating body 1 is raised and the rotation detection plate 23 is rotating, or the elevating body 1 is lowered and the rotation detection plate 23 is not rotating. Judged to be abnormal. Further, the failure determination unit 205 indicates that the clutch 17 is normal when the elevating body 1 is raised and the rotation detection plate 23 is not rotated, or when the elevating body 1 is lowered and the rotation detection plate 23 is rotating. Is determined. The determination result is supplied to the control panel 103.

  The functional units 201 to 205 of the electronic safety controller 200 described above can be realized by software by the processor interpreting and executing a program that realizes each function. At this time, information such as programs, tables, and files for realizing each function is recorded in the memory 206, a recording device such as a hard disk or SSD (Solid State Drive), or a recording medium such as an IC card, SD card, or DVD. can do. Moreover, about each said function parts 201-205 etc., those parts or all can also be implement | achieved by hardware, for example by designing with an integrated circuit.

[Fault detection procedure]
FIG. 8 is a flowchart showing an example of a failure detection processing procedure by the control system of the elevator apparatus to which the present invention is applied.
The failure detection process shown in FIG. 8 is realized by the processor (microcomputer) of the electronic safety controller 200 reading and executing a program stored in the memory 206. As a precondition of this flowchart, transmission of the rotation of the sheave 9a to the rotating body 18 of the second speed governor 15 is released during the ascending operation of the elevator apparatus at normal time, and the rotation detection plate 23 is in a stopped state. Further, during the descent operation, the rotation of the sheave 9a is transmitted to the rotating body 18 of the second speed governor 15 via the clutch 17, and the rotation detection plate 23 rotates.

  When the elevator apparatus is operated and the control panel 103 starts traveling of the elevator body 1 (step S1), first, the speed information processing unit 201 first calculates the traveling speed calculated from the encoder signal of the rotary encoder 19 (hereinafter referred to as “rotary encoder 19”). It is determined whether or not a predetermined threshold value, for example, 200 m / min, has been reached (step S2). Then, when the speed detection value of the rotary encoder 19 has reached 200 m / min (YES in step S2), the speed information processing unit 201 proceeds to the process in step S3. If the speed detection value of the rotary encoder 19 has not reached 200 m / min (NO in step S2), the determination process in this step is continued until the speed detection value of the rotary encoder 19 reaches a predetermined threshold value. To do.

  Next, the speed information processing unit 201 determines whether or not a speed detection value using the rotation detection plate 23 is generated (step S3). That is, the speed information processing unit 201 performs processing for receiving the output signal of the failure detection sensor 24 at a predetermined cycle, and based on the output signal of the failure detection sensor 24, the traveling speed (hereinafter referred to as “speed by the rotation detection plate 23). It is determined whether or not “detected value” is calculated. Here, when the traveling speed cannot be calculated, the speed information processing unit 201 determines that the rotation detection plate 23 is not rotating (NO in Step S3), and counts up the non-rotation detection counter 203 (Step S3). S4). On the other hand, when the traveling speed can be calculated, the speed information processing unit 201 determines that the rotation detection plate 23 is rotating (YES in step S3), and proceeds to step S7.

  Thereafter, the rotation determination unit 204 determines whether or not the count value of the non-rotation detection counter 203 is less than a predetermined value, for example, 8 times (step S5), and if it is less than 8 times (YES in step S5), the step again Returning to S3, the same processing is repeated. On the other hand, when the count value of the non-rotation detection counter 203 is 8 times or more (NO in step S5), the rotation determination unit 204 determines that the rotation detection plate 23 does not rotate (step S6).

  When the speed detection value by the rotation detection plate 23 can be calculated in the determination process of step S3 (YES in step S3), the speed information processing unit 201 detects the current (current) speed detection value by the rotation detection plate 23. Is different from the speed detection value of the previous time (before half rotation) (step S7). As a result, when the current speed detection value is different from the previous speed detection value (YES in step S7), the speed information processing unit 201 proceeds to step S8, and the current speed detection value and the previous speed detection are detected. If the values are the same, the process returns to step S3 and the same processing is repeated (NO in step S7).

  If the current speed detection value and the previous speed detection value are different in the determination process of step S7 (YES in step S7), the speed information processing unit 201 determines the speed detection value of the rotary encoder 19 and the rotation detection plate. It is determined whether or not the difference from the speed detection value by 23 (difference d in FIG. 6) is equal to or smaller than a predetermined threshold value (step S8). The predetermined threshold is, for example, 30 m / min. If the difference d between the two is 30 m / min or less (YES in step S8), the speed information processing unit 201 increments the rotation detection counter 202 (step S9). On the other hand, when the difference d between the two exceeds 30 m / min (NO in step S8), the speed information processing unit 201 proceeds to step S4 and increments the non-rotation detection counter 203.

  Next, the rotation determination unit 204 determines whether or not the count value of the rotation detection counter 202 is less than a predetermined value, for example, 8 times (step S10), and if it is less than 8 times (YES in step S10), the step again Returning to S3, the same processing is repeated. On the other hand, when the count value of the rotation detection counter 202 is 8 times or more (NO in step S10), the rotation determination unit 204 determines that the rotation detection plate 23 is rotating (step S11).

  Thereafter, in response to the determination result of step S6 or step S11, the failure determination unit 205 determines whether the speed information processing unit 201 is based on the traveling direction information of the lifting body 1 calculated based on the encoder signal of the rotary encoder 19. 1 traveling direction is determined (step S12).

  Then, the failure determination unit 205 determines that the failure determination unit 205 is in the case where the lifting body 1 is raised and the rotation detection plate 23 is not rotated, or the lifting body 1 is lowered and the rotation detection plate 23 is rotating. The failure detection process is terminated assuming that the clutch 17 is normal. The failure determination unit 205 indicates that the clutch 17 is abnormal when the lifting body 1 is raised and the rotation detection plate 23 is rotating, or when the lifting body 1 is lowered and the rotation detection plate 23 is not rotating. And the determination result is output to the control panel 103. In response to the determination result that the clutch 17 is abnormal, the control panel 103 (electronic safety system) performs appropriate control such as stopping the elevator 1 at the nearest floor.

  As described above, in the elevator apparatus according to the first embodiment, whether or not the rotation detection plate 23 that rotates in synchronization with the rotating body 18 of the second governor 15 of the failure detection apparatus 30 is rotating. Judgment is made. Based on the rotation / non-rotation determination result and information on the traveling direction of the lifting body 1 calculated based on the encoder signal of the rotary encoder 19, the normal / abnormal clutch is determined. Thereby, the intermittent shielding phenomenon due to the vibration of the lifting body 1 and the like described in FIG. 6 is excluded, and the normal / normal state of the clutch 17 that transmits or releases the rotation to the rotating body 18 of the second governor 15. Abnormality, that is, failure of the clutch 17 can be accurately detected.

  Furthermore, in the first embodiment, there is a process for increasing the accuracy of determination of rotation / non-rotation of the rotation detection plate 23. For example, by comparing the speed detection value of the rotation detection plate 23 with the speed detection value of the rotary encoder 19, the detection accuracy of rotation / non-rotation of the rotation detection plate 23 can be increased. In particular, as shown in FIG. 6, when the speed detection value by the rotation detection plate 23 is low, an error in the speed detection value by the rotation detection plate 23 increases because the difference from the speed detection value of the rotary encoder 19 is large. . Therefore, a predetermined threshold value (for example, 200 m / min) is set such that the difference between the speed detection value by the rotation detection plate 23 and the speed detection value of the rotary encoder 19 is small (see step S2). When the speed detection value by the rotary encoder 19 reaches this threshold value, the comparison between the two is started, so that the detection accuracy of rotation / non-rotation of the rotation detection plate 23 is improved. In addition, although the process of step S2 is a desirable form, it can be abbreviate | omitted.

  In the first embodiment, the rotation detection counter 202 (non-rotation detection counter 203) is counted up eight times to improve the determination accuracy (see steps S5 and S10). Even if noise is mixed into the output signal output from the failure detection sensor 24 in step S3 and the speed detection value detected by the rotation detection plate 23 is erroneously detected, the speed detection value changes as the determination is repeated. It is possible to prevent the determination that “rotating”. Therefore, it is possible to prevent erroneous detection of the rotation of the rotation detection plate 23 in the end. In addition, although the process of step S4, S5, S9, S10 is a desirable form, it can be abbreviate | omitted.

  Further, in the first embodiment, it is determined whether or not the current speed detection value by the rotation detection plate 23 is different from the previous (half rotation) speed detection value (see step S7). With such a configuration, the rotation / non-rotation detection accuracy of the rotation detection plate 23 can be improved. In addition, although the process of step S7 is a desirable form, it can be abbreviate | omitted.

  Furthermore, in the first embodiment, it is determined whether or not the difference between the speed detection value of the rotary encoder 19 and the speed detection value of the rotation detection plate 23 is equal to or less than a predetermined threshold value (see step S8). ). With such a configuration, the rotation / non-rotation detection accuracy of the rotation detection plate 23 can be improved. In addition, although the process of step S8 is a desirable form, it can be abbreviate | omitted.

  Generally, a rotary encoder is expensive. If the rotation detection plate 23 and the failure detection sensor 24 are replaced with a rotary encoder, two rotary encoders are provided on the second speed governor 15 side together with the rotary encoder 19 and the cost increases. However, in the present embodiment, by using the rotation detection plate 23 and the failure detection sensor 24, the failure of the clutch 17 can be detected with an inexpensive configuration while suppressing an increase in cost.

<2. Second Embodiment>
Next, another example of the rotation detection plate used in the failure detection apparatus for an elevator apparatus to which the present invention is applied will be described.

FIG. 9 is a plan view of a main part of the governor 10 according to the second embodiment of the elevator apparatus to which the present invention is applied.
The rotation detection plate 31 according to the present embodiment has a disc-shaped main body 32, and a semicircular hole 33 (an example of a semicircular portion) is formed in a part of the main body 32. The rotation center of the rotation detection plate 31 coincides with the rotation axis of the second roller 21.

  With such a configuration, the position (hole) of the main body 32 that passes between the output side 24a and the input side 24b of the failure detection sensor 24 every time the rotation detection plate 31 makes a half rotation (180 degree rotation). The part 33 and the other part) are switched. Therefore, even when the rotation detection plate 31 is used, as in the case of the rotation detection plate 23, each time the rotation detection plate 31 rotates halfway, the signal output from the failure detection sensor 24 is switched on / off. Further, the distance r from the rotation center of the rotation detection plate 23 to the detection point 26 of the failure detection sensor 24 can be the same as that of the rotation detection plate 23 and the failure detection sensor 24 shown in FIG. Therefore, also in the present embodiment, the length of the semicircular arc (movement distance L0) that is the locus of the detection point 26 on the rotation detection plate 23 is determined by the distance r.

  As described above, according to the second embodiment, as in the case of the rotation detection plate 23 (see FIG. 4), the output signal of the failure detection sensor 24 every time the rotation detection plate 31 makes a half rotation. Is switched on / off. Further, the shape of the main body 32 of the rotation detection plate 31 is a disk shape, and there is no corner at the outer peripheral end. Therefore, the safety when the rotation detection plate 31 rotates is improved.

  In the present embodiment, the number of holes formed in the rotation detection plate 31 is one, but two or more holes may be formed. The number and shape of the holes formed in the rotation detection plate may be any configuration as long as the signal emitted from the output side 24a of the failure detection sensor 24 can be periodically and repeatedly detected according to the rotation of the rotation detection plate.

<3. Third Embodiment>
FIG. 10 is a cross-sectional view of a speed governor 10 according to a third embodiment of an elevator apparatus to which the present invention is applied.
As shown in FIG. 10, in the failure detection device 30 </ b> A provided on the second speed governor 15 side, the clutch 41 is disposed between the shaft 25 a of the base 25 and the second roller 21. As the clutch 41, for example, a cam type one-way clutch (cam clutch) is used. The outer ring 41 b of the clutch 41 is fixed to the second roller 21, and the inner ring 41 a of the clutch 41 is fixed to the shaft 25 a of the base 25.

  The clutch 41 transmits the rotation of the transmission system 22 to the second roller 21 during the lowering operation of the lifting body 1 and releases the transmission of the rotation of the transmission system 22 to the second roller 21 during the lifting operation of the lifting body 1. . That is, the clutch 41 allows the second roller 21 to rotate in the same direction as the transmission system 22, that is, the first roller 20 during the lowering operation of the lifting body 1, and the second roller 21 is opposite during the lifting operation of the lifting body 1. Do not rotate in the direction.

  As described above, according to the third embodiment, during the ascending operation of the lifting / lowering body 1, the clutch 41 prevents the rotation of the rotating body 18 of the second speed governor 15 to prevent erroneous detection. Reliability can be improved. Other than that, there exists an effect similar to 1st Embodiment. Further, this embodiment may be combined with the second embodiment.

  Furthermore, the present invention is not limited to the embodiments described above, and various other application examples and modifications can of course be taken without departing from the gist of the present invention described in the claims. It is.

  For example, the above-described embodiments are detailed and specific descriptions of the configuration of the apparatus and the system in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described. Absent. A part of the configuration of an embodiment can be replaced with the configuration of another embodiment. Further, the configuration of another embodiment can be added to the configuration of one embodiment. Moreover, it is also possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  Further, the control lines and information lines indicate what is considered necessary for the explanation, and not all the control lines and information lines on the product are necessarily shown. Actually, it may be considered that almost all the components are connected to each other.

  Further, in this specification, the processing steps describing time-series processing are not limited to processing performed in time series according to the described order, but are not necessarily performed in time series, either in parallel or individually. The processing (for example, parallel processing or object processing) is also included.

  DESCRIPTION OF SYMBOLS 1 ... Elevating body, 7 ... Connecting member, 8 ... Speed control rope, 9a, 9b ... Sheave, 10 ... Speed governor, 12 ... Horizontal axis, 13 ... First speed governor, 15 ... Second speed control Speed machine, 17 ... clutch, 18 ... rotating body, 19 ... rotary encoder (rotation detection sensor), 20 ... first roller, 21 ... second roller, 22 ... transmission system, 23, 31 ... rotation detection plate, 23C ... Arc: 24 ... Sensor for detecting failure, 24a ... Output side, 24b ... Input side, 27 ... Encoder speed detection characteristic, 28 ... Detection plate speed detection characteristic, 29 ... Area, 32 ... Main body, 33 ... Hole, 41 ... Clutch 101 ... Machine room, 102 ... Hoistway, 103 ... Control panel, 200 ... Electronic safety controller (control unit), 201 ... Speed information processing unit, 202 ... Rotation detection counter, 203 ... Non-rotation detection counter, 204 ... Rotation determination unit, 205 ... Failure determination unit, 206 ... Memory

Claims (7)

A speed control rope connected to the lifting body;
A sheave fixed to a horizontal shaft and wrapped around the speed-control rope;
A first governor that regulates the rotational speed of the sheave and detects the overspeed of the lifting body;
A second governor that regulates the rotational speed of the sheave during the descent operation of the elevating body and detects the descent overspeed of the elevating body;
The horizontal shaft and the second speed governor are connected, and the rotation of the sheave is transmitted to the rotating body of the second speed governor during the lowering operation of the lifting body, and during the lifting operation of the lifting body A clutch for releasing transmission of rotation of the sheave to the rotating body of the second governor;
A rotation detection sensor that detects rotation of the horizontal axis and outputs a first detection signal;
A rotation detection plate that rotates in synchronization with the rotating body of the second governor;
A failure detection sensor that outputs a second detection signal in accordance with the rotation of the rotation detection plate;
A controller that receives the first detection signal output from the rotation detection sensor and receives the second detection signal output from the failure detection sensor;
The control unit determines rotation / non-rotation of the rotation detection plate using the second detection signal, and the traveling direction of the lifting body calculated based on the determination result and the first detection signal elevator device you judge the normality / abnormality of said clutch from a. Wherein the control unit, the lifting member is raised and the rotation detection plate is rotated, or wherein when the lifting member is lowered and the rotation detection plate is not rotating, it is determined that the clutch is abnormal, the lifting body rise and the rotation detection plate is not rotated, or the elevator apparatus according to claim 1 determines that the lift body is lowered and the rotation detection plate when the rotation is normally the clutch. When the first traveling speed of the elevating body calculated based on the first detection signal output from the rotation detection sensor is greater than or equal to a predetermined threshold value, the control unit The elevator apparatus according to claim 2, wherein a rotation / non-rotation determination of the rotation detection plate is performed using the detection signal. Further, if the second traveling speed of the lifting body can be calculated based on the second detection signal output from the failure detection sensor, the rotation that counts up as the rotation detection plate is rotating A detection counter;
A non-rotation detection counter that counts up as the rotation detection plate is not rotating when the second traveling speed of the elevating body cannot be calculated ,
Wherein the control unit, the count value of the rotation detection counter is judged to the rotation detection plate is equal to or greater than the predetermined value is rotating, when the count value of the non-rotation detection counter is equal to or greater than a predetermined value The elevator apparatus according to claim 2, wherein the rotation detection plate is determined to be non-rotating. The controller is configured to calculate the second traveling speed of the lifting body calculated based on the second detection signal output from the failure detection sensor, and the second traveling speed of the lifting body calculated last time. comparing the running speed, when the current time of the second speed and the calculated pre-times the second running speed differs, in claim 2 judges that the rotation detection plate is rotating The elevator apparatus as described. Wherein the control unit is configured and now from the failure detecting sensor of the lifting body based on the output the second detection signal times the second running speed, the output from the rotation detecting sensor of the first It is determined whether or not a difference from the first traveling speed of the elevating body based on the detection signal is equal to or less than a predetermined threshold value. The elevator apparatus according to claim 4 or 5, wherein it is determined that the rotation detection plate is non-rotating when the predetermined threshold value is exceeded. The elevator apparatus according to claim 1, wherein the rotation detection plate has a semicircular portion, and the failure detection sensor outputs the second detection signal by detecting the presence or absence of the semicircular portion.

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