JP2013086930A - Brake diagnostic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To issue an alert when an abnormal condition is detected even before the next scheduled inspection after the inspection by a maintenance stuff.SOLUTION: The brake diagnostic device includes: a motion conversion means that is provided above a plunger of an electromagnetic brake in an elevator hoisting machine and above an excitation coil cover, and converts the vertical strokes of the plunger by the excitation control of the excitation coil into the rotational amount of a rotational motion; a diagnostic means that detects the rotational amount of the rotational motion converted by the motion conversion means, and diagnoses the state of the electromagnetic brake in the elevator hoisting machines on the basis of the detected rotational amount; and an alert issuing means that issues an alert to request maintenance to a predetermined address if the diagnostic means determines that the electromagnetic brake in the elevator hoisting machines is abnormal.

Description

  The present invention relates to an elevator brake diagnostic apparatus.

  The conventional elevator brake diagnosis device has a mechanism that manually rotates the plunger of the electromagnetic brake of the elevator hoist, and the maintenance staff measures the rotational torque when the plunger is rotated with a torque wrench. From the above, the brake state is diagnosed by judging the abnormality of the plunger stroke (for example, Patent Document 1).

JP 2002-265161 A

  In the conventional brake diagnostic system, maintenance personnel check the electromagnetic brake plunger of the elevator hoisting machine on site, so maintenance personnel check on-site, so even if there is an abnormality in the plunger stroke since the previous inspection date. The electromagnetic brake abnormality of the elevator hoisting machine cannot be detected until the next inspection date, and there is a problem that the elevator continues to run while the electromagnetic brake is in an abnormal state.

  In addition, when a conventional brake diagnosis device is to be introduced into an electromagnetic brake of an existing elevator hoisting machine, it is necessary to provide a mechanism for manually rotating a plunger of the electromagnetic brake of the elevator hoisting machine. It was difficult to retrofit.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a brake diagnostic apparatus that can always diagnose the occurrence of an abnormality in the plunger stroke of an electromagnetic brake of an elevator hoisting machine. .

  It is another object of the present invention to provide a brake diagnostic apparatus that can be easily retrofitted to an electromagnetic brake of an existing elevator hoisting machine.

  The brake diagnosis apparatus according to the present invention is provided on the upper part of the plunger of the electromagnetic brake and the upper part of the excitation coil cover of the elevator hoisting machine, and rotates the vertical movement stroke of the plunger by the excitation control of the excitation coil. A motion converting means for converting into a quantity; a diagnostic means for detecting the amount of rotation of the rotary motion converted into the motion converting means and diagnosing the state of the electromagnetic brake of the elevator hoisting machine based on the detected amount of rotation; When the diagnosis means diagnoses that there is an abnormality in the state of the electromagnetic brake of the elevator hoisting machine, there is provided a notification means for issuing a request for maintenance and inspection to a predetermined contact address.

  According to the brake diagnosis apparatus according to the present invention, it is possible to provide a brake diagnosis apparatus that can always diagnose the occurrence of abnormality in the plunger stroke of the electromagnetic brake of the elevator hoisting machine. In addition, the notification of the diagnosis result makes it possible to respond immediately if there is an abnormality without waiting for the next periodic inspection.

  In addition, it is possible to provide a brake diagnostic device that can be easily retrofitted to an electromagnetic brake of an existing elevator hoisting machine.

It is a block diagram which shows an example of the brake diagnostic apparatus which concerns on Embodiment 1 of this invention. It is a block diagram which shows an example of the electromagnetic brake of the brake diagnostic apparatus which concerns on Embodiment 1 of this invention. It is a related figure which shows an example of excitation of the exciting coil of the brake diagnostic apparatus which concerns on Embodiment 1 of this invention, and the up-and-down operation of a plunger. It is an enlarged view which shows one structural example of the plunger which provided the core and protrusion of the brake diagnostic apparatus which concerns on Embodiment 1 of this invention. It is an enlarged view which shows one structural example of the rotational force urging device which provided the notch of the brake diagnostic apparatus which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows an example of the rotational operation produced | generated when the protrusion of the plunger of the brake diagnostic apparatus which concerns on Embodiment 1 of this invention engages with the notch of a rotational force bias device. It is explanatory drawing which shows an example of the structure which provided the imaging means to the diagnostic means of the brake diagnostic apparatus which concerns on Embodiment 1 of this invention. It is explanatory drawing (modification 1) of the rotation angle detection by the image processing of the brake diagnostic apparatus which concerns on Embodiment 1 of this invention. It is explanatory drawing (modification 2) of the rotation angle detection by the image processing of the brake diagnostic apparatus which concerns on Embodiment 1 of this invention. It is an enlarged view which shows the modification of the plunger which provided the core and protrusion of the brake diagnostic apparatus which concerns on Embodiment 1 of this invention. It is an enlarged view which shows the modification of the plunger which provided the core and protrusion of the brake diagnostic apparatus which concerns on Embodiment 1 of this invention. It is an enlarged view which shows the modification of the plunger which provided the notch in the core of the brake diagnostic apparatus which concerns on Embodiment 1 of this invention. It is an enlarged view which shows the modification of the rotational force urging device which provided the protrusion of the brake diagnostic apparatus which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows an example of the rotational operation produced | generated when the notch of the plunger of the brake diagnostic apparatus which concerns on Embodiment 1 of this invention engages with the protrusion of a rotational force bias device. It is explanatory drawing which shows an example of the structure which provided the rotation amount detection means to the diagnostic means of the brake diagnostic apparatus which concerns on Embodiment 2 of this invention.

  The brake diagnostic device according to the present invention diagnoses an abnormality in the plunger stroke of the electromagnetic brake of the elevator hoisting machine and notifies the maintenance center or the maintenance staff of the diagnosis result even when the maintenance staff is absent from the site. is there.

  Embodiments (examples) of a brake diagnostic apparatus according to the present invention will be described below with reference to the drawings.

Embodiment 1 FIG.
In the first embodiment of the present invention, the vertical motion of the plunger of the electromagnetic brake is converted into a circular motion of the core, and the stroke of the vertical motion is replaced with the amount of rotation of the circular motion proportional to the stroke, so that the diagnostic means 106 has imaging means. A brake diagnosis apparatus that introduces 61 and issues a warning if there is an abnormality in the amount of rotation detected from image processing of a captured diagnostic image will be described.

  1 is a block diagram showing an example of a brake diagnostic apparatus according to Embodiment 1 of the present invention. In the figure, the electromagnetic brake 10 includes a brake wheel 101, a brake wheel rotation suppressing unit 102, an excitation unit 103, a plunger 104, a motion conversion unit 105, and a diagnosis unit 106. The brake wheel 101 is connected to an elevator hoisting machine (motor) 11 and operates the elevator car 12 by rotating. The brake wheel rotation suppression means 102 stops the rotation by suppressing the rotation of the brake wheel 101. The exciting means (exciting coil) 103 has its exciting force controlled by the energization amount. The plunger 104 moves up and down by the excitation force of the excitation unit 103 and controls the rotation suppression force of the brake wheel rotation suppression unit 102. The motion conversion means 105 converts the vertical movement of the plunger 104 into a rotational momentum (rotation angle) related to the vertical movement amount (stroke). Based on the rotational momentum converted by the motion conversion means 105, the diagnosis means 106 diagnoses whether there is an abnormality in the brake when the elevator stops. When the diagnosis unit 106 diagnoses that there is an abnormality in the brake, the reporting unit 107 issues a maintenance request to a predetermined contact address (maintenance center or maintenance staff) of the elevator. The diagnosis result may be set not only when there is an abnormality, but also when the abnormality is not abnormal, the reporting means 107 periodically reports to a predetermined contact address.

  FIG. 2 is a configuration diagram illustrating an example of an electromagnetic brake of the brake diagnostic apparatus according to Embodiment 1 of the present invention. A structure is demonstrated based on the block diagram which looked at the electromagnetic brake of this brake diagnostic apparatus from the front. Here, illustration of the diagnostic means 106 and the alerting means 107 shown in FIG. 1 is omitted. In the figure, the brake wheel 21 is connected to an elevator hoist (motor, not shown) and rotates. On both sides of the brake wheel 21, there are a brake arm 23 that is biased toward the brake wheel 21 by a push spring 22, and a friction material 24 attached to the brake arm 23. A bolt 25 is attached to the brake arm 23, and the bolt 25 is biased toward the brake lever 26, and the brake lever 26 is biased toward the lower surface of the plunger 27. The plunger 27 moves up and down by the excitation of the excitation coil 28. Details of the motion conversion means 30 provided on the plunger 27 and the excitation coil cover 29 will be described later.

  The brake wheel 21, the plunger 27, and the excitation coil 28 correspond to the brake wheel 101, the plunger 104, and the excitation means (excitation coil) 103 in FIG. Further, the push spring 22, the brake arm 23, the friction material 24, the bolt 25, and the brake lever 26 constitute the brake wheel rotation suppressing means 102 in FIG.

  The basic operation of the electromagnetic brake will be described with reference to FIG. In the figure, when the electromagnetic brake is braked, the exciting coil 28 is not energized, so that the brake arm 23 presses the friction material 24 against the brake wheel 21 by the urging force of the pressing spring 22, and the brake wheel 21 Cannot rotate. At the same time, the plunger 27 is urged from the bolt 25 via the brake lever 26 by the urging force of the push spring 22 to keep its position.

  On the other hand, when the electromagnetic brake is released, the excitation coil 28 is energized so that the plunger 27 is attracted downward, one end of the brake lever 26 contacting the lower end of the plunger 27 is pushed down, and the other end is contacted. The brake arm 23 is biased in a direction away from the brake wheel 21 via the bolt 25, and the pressing of the friction material 24 onto the brake wheel 21 is loosened so that the brake wheel 21 can rotate.

  FIG. 3 is a relationship diagram showing an example of excitation of the excitation coil and vertical movement of the plunger of the brake diagnostic apparatus according to Embodiment 1 of the present invention. In the figure, the left figure shows a state where the exciting coil 28 is not excited. The plunger 27 is in the illustrated position before and after the exciting coil 28 is excited. On the other hand, the right figure shows a state in which the exciting coil 6 is being excited. The plunger 27 is attracted downward by exciting the exciting coil 28, and the amount of movement of the plunger 27 at this time becomes a stroke 41.

  Next, the motion conversion means 30 is provided above the plunger 27 and the excitation coil cover 29 and converts the movement amount (stroke) of the vertical movement of the plunger 27 into a rotational momentum (rotation angle) related to the movement amount. The configuration will be described with reference to FIGS. 4 and 5.

  FIG. 4 is an enlarged view showing a configuration example of a plunger provided with a core and a protrusion of the brake diagnostic apparatus according to Embodiment 1 of the present invention. In the figure, the core 31 is a cylindrical member provided on the extension of the center of the plunger 27. Further, since the core 31 is thinner than the diameter of the plunger 27, the protrusion 32 is provided at two points with a left and right equal length by penetrating the center of the core 31 with a rod-shaped member. The configuration described here is an example, and the protrusion 32 does not penetrate the core 31, and a form in which a member (for example, a screw) is inserted into a hole opened from the outside of the core 31 for each protrusion 32, or the protrusion 32. The form which adhere | attaches the member used as the core 31 and the form which integrally shape | molds a protrusion and a core may be sufficient. If the brake diagnosis device can be introduced at the same time as the installation of the elevator instead of being retrofitted, the core 31 may be integrally formed with the plunger 27 in advance. The core 31 and the protrusion 32 are not limited to members having an equal thickness and a cross section.

  FIG. 5 is an enlarged view showing a configuration example of a rotational force biasing device provided with a notch in the brake diagnostic apparatus according to Embodiment 1 of the present invention. In the figure, the rotational force urging device 33 is provided with a notch 34 that engages two protrusions provided on the upper portion of the plunger 27 with a cylindrical member. In addition, the structure mentioned here is an example, The inside of the rotational force urging device 33 provided with the notch 34 is a cylindrical space because the projection of the plunger is engaged and converted into a rotational motion. The outer shape does not have to be a circle, that is, it does not have to be in the form of the cylindrical rotational force biaser 33 as shown in FIG.

  As described above, the motion converting means 30 includes the core 31 provided on the plunger 27 of the electromagnetic brake of the elevator hoist and the rotational force bias provided on the excitation coil cover 29 so as to surround the core 31. It is set as the structure containing the protrusion 33 provided outward from the core 31, and the notch 34 which engage | engages the protrusion 32 provided inside the rotational force biasing device 33. As shown in FIG.

  Here, the notch 34 provided inside the rotational force urging device 33 is inclined with respect to the vertical movement direction of the plunger 27, thereby obtaining the effect of converting the vertical movement into the rotational movement. For example, an oblique notch that is close to a straight line as shown in FIG. 5 along the inner surface of the rotational force biasing device 33 that is not parallel to the direction of the vertical movement of the plunger 27, or a spiral notch may be used. . The rotational angle of the rotational motion accompanying the up-and-down motion stroke of the plunger 27 and the rotational direction (clockwise or counterclockwise) are defined by the way of providing the notch inclination.

  FIG. 6 is an explanatory diagram showing an example of a rotation operation that is generated when the protrusion of the plunger of the brake diagnostic apparatus according to Embodiment 1 of the present invention is engaged with the notch of the rotational force biasing device. Here, when the plunger 31 provided with the core 31 and the protrusion 32 in FIG. 4 and the rotational force biaser 33 provided with the notch 34 in FIG. 4 are combined and operated so that the protrusion 32 engages with the notch 34. The rotation operation will be described based on an explanatory diagram of the state seen from above. The entrance of the notch 34 and the main body of the plunger 27 on the upper surface of the rotational force biasing device 33 shown in FIG. 4 are not shown.

  In the drawing, a scale indicating the position of the protrusion 32 rotated in response to the notch of the rotational force urging device 33 as the plunger 27 moves up and down is drawn on the upper circumference of the rotational force urging device 33. . For example, in the figure seen from the upper surface, when the plunger 27 is not in the excited state, the horizontal state of the protrusion 32 is the normal state. The position of the protrusion 32 at this time is indicated by a scale 51. If the position of the protrusion 32 is the position immediately after the elevator maintenance, a change in the state of the brake accompanying the operation after the elevator maintenance is diagnosed by the position of the protrusion 32, that is, the change in the stroke of the plunger 27. For example, when the position of the rotated protrusion 32 is in a normal range that does not exceed the boundary of the scale 52 as shown in the left figure, the abnormal state where the rotation further exceeds the boundary of the scale 52 as shown in the right figure. Diagnose an abnormal condition (non-normal condition) when entering the range (non-normal condition).

  In addition, you may provide the auxiliary | assistant scale 53 which divided | segmented further finely between the scale 51 and the scale 52 which show a normal range. Similarly to the auxiliary scale 53, an auxiliary scale (not shown) may be provided as appropriate for a portion that enters the abnormal range (non-normal range) from the normal range. Further, the protrusion 32 itself may be colored to improve the visibility by devising different color coding in the normal range and the abnormal range (non-normal range), the thickness of the scale, and the like.

  FIG. 7 is an explanatory diagram showing an example of a configuration in which an imaging unit is provided in the diagnostic unit of the brake diagnostic apparatus according to Embodiment 1 of the present invention. Here, the components from the brake wheel 21 to the brake lever 26 shown in FIG. 2 are not shown.

  In the figure, the imaging means (camera) 61 operates in a state where the projection 32 of the plunger 27 is operated in combination so that the protrusion 32 of the plunger 27 engages with the notch of the rotational force biasing device 33 as shown in FIG. Take a diagnostic image from above. The image recording unit 62 stores a diagnostic image obtained by capturing the position of the protrusion 32 of the plunger 27 with the imaging unit 61 in a state where sufficient elevator maintenance is performed by a maintenance staff as a reference image. The image processing unit 63 measures the position (rotation amount) of the protrusion of the plunger by image processing from the diagnostic image captured by the imaging unit 61 and the reference image stored by the image recording unit 62. The state determination unit 64 diagnoses an abnormal state (non-normal state) when the rotation amount measured by the image processing unit 63 is not within the range of the reference value, and issues a command to notify the notification unit 107. When instructed by the state determination unit 64 to issue a notification, the notification unit 107 issues a notification to a monitoring center or maintenance personnel via a communication unit (not shown).

  The imaging means 61 applies a rotational force to the protrusion 32 of the plunger 27 triggered by a change in a control signal value for operating the exciting coil 28 for exciting the plunger 27 or an elevator hoist (not shown). You may make it image only when it supports.

  Further, the image recording means 62 may not always store only the reference image, but may always record including the diagnostic image, and since there is a limitation on the recording capacity, the diagnostic image after a predetermined time has passed, Or you may make it erase | eliminate the diagnostic image by which abnormality (unnormal) was not detected. Other diagnostic images may be erased when resetting the reference value after maintenance support at the time of periodic maintenance or when an abnormal state (unnormal state) is detected. The diagnostic image may be manually deleted by maintenance personnel at the maintenance site, may be deleted remotely from the maintenance center, and may be backed up to other recording means before deletion. .

  The image processing means 63 may measure the position (rotation amount) of the protrusion 32 from the difference image between the diagnostic image and the reference image to make a diagnosis, or the position of the protrusion from the scale imaged together with the protrusion 32 in each image. (Rotation amount) may be read and diagnosed by the difference between the rotation amounts.

  In addition, the state determination unit 64 diagnoses an abnormal state (non-normal state) when the rotation amount measured by the image processing unit 63 is not within the range of the reference value, but further provides a second reference value, If it is an abnormal state (non-normal state) exceeding the reference value, the elevator operation may be stopped immediately to ensure safety.

  Further, the reporting unit 107 may use either wired communication or wireless communication for reporting to the monitoring center. Moreover, you may utilize a wireless communication for a maintenance vehicle or a maintenance terminal for the notification to a maintenance worker. The notification content may include the detected angle, its evaluation status, and a captured image.

  In the above description, the image processing unit 63 has been described as obtaining the rotation angle of the protrusion 32 when the rotation amount of the plunger 27 is image-processed and analyzed. A description will be given of analyzing the amount of rotation (rotation angle) by image processing by dividing the circle on the upper surface of the core 31 into two semicircles by diameter and performing different coloring. When the core 31 is thin and the upper surface circle is small, another disk member may be attached. For example, as shown in FIG. 8, the image processing unit 63 rotates a difference image (right diagram) between a reference image (left diagram) captured immediately after maintenance and a diagnostic image (center diagram) captured during operation. Two fan shapes are extracted, and an angle formed by two radii forming the fan shape is measured as a rotation angle. When the rotation angle is not within the reference value range, the state determination unit 64 determines that the abnormal state (unnormal state) is detected. Can be diagnosed. Alternatively, instead of the rotation angle, the fan-shaped area proportional to the rotation angle may be measured, and when the fan-shaped area is not within the range of the reference value, an abnormal state (non-normal state) may be diagnosed. The sector area may be considered as the number of pixels included in the sector, and an abnormal state (non-normal state) may be diagnosed when the number of pixels included in the sector is not within the range of the reference value. In addition, the difference image between the reference image and the diagnostic image is distributed in a background area with no motion difference and a fan-shaped area with motion difference and non-zero. Therefore, even if the shape of a sector is not strictly recognized, the number of pixels that take a non-zero difference proportional to the area is counted, and if the number of pixels that take a non-zero difference is not within the reference value range, Normal state) can also be diagnosed. At this time, the absolute value of the pixel of the difference image may be binarized with a predetermined threshold, and then the non-difference pixels may be counted, or the pixel whose difference absolute value is not less than the predetermined threshold without binarization May be counted as the number of non-zero difference pixels. The coloring of the circle is not limited to the diameter, and may be divided into two fan-shaped areas by two radii, and is not limited to two colors, but is divided into more areas, for example, three or more fan-shaped areas, Coloring may be performed with two or more colors including two-color alternating coloring divided into even-numbered areas.

  Further, as a second modification, for example, the circle on the upper surface of the core 31 provided on the plunger 27 is colored in a sector area (the area S = 1) whose rotation angle indicates a normal range, and the image processing means 63 is As shown in FIG. 9, by obtaining a differential image (center diagram and right diagram) from which one or two sectors are extracted from the reference image (left diagram) and the diagnostic image, the total area of the sector images of the difference image is rotated. The state from the area S = 0 in the state that is not performed to the area S = 2 that does not exceed the boundary that is determined as an abnormal state (non-normal state) indicated by a broken line is a normal state, and the state that the area S = 2 or more The abnormal state (unnormal state) and the state determination means 64 may diagnose. Here, instead of the total area of the sector of the difference image, the diagnosis may be made with the number of non-difference pixels.

  In the diagnosis based on the fan-shaped difference image extracted from the reference image and the diagnostic image, the scales 51 and 52 and the auxiliary scale 53 described with reference to FIG. 6 are not necessarily provided. When the image is remotely confirmed from the monitoring center, it is an effective index for diagnosing whether the elevator brake is in a normal state or an abnormal state (unnormal state).

  Furthermore, in the brake diagnostic apparatus according to Embodiment 1 of the present invention, the motion converting means for converting the linear motion into the rotational motion by engaging the protrusion 32 of the plunger 27 with the notch 34 of the rotational force biasing device 33. As the configuration of 30, the following form (modified example) may be adopted.

  In other words, the core 31 may be made thicker than the plunger 27 as shown in FIG. At this time, a line corresponding to a radius or a diameter connecting the protrusion 32 and the center of the core 31 may be drawn on the upper surface of the core 31 to improve the visibility equivalent to the protrusion 32. Further, the number of protrusions 32 and the number of notches 34 that are normally provided in the same number are not necessarily two, and may be realized by one or more points.

  Further, if the protrusion 32 is engaged with the notch 34, the protrusion 32 and the core 31 may be provided at a location off the extension line of the center line (axis) of the plunger 27 as shown in FIG. A plurality of protrusions 32 and cores 31 having such a configuration may be provided on the plunger 27.

  Also, in FIG. 4, by providing the left and right protrusions 32 at the same height, two notches 34, for example, two straight or double spiral notches are required as shown in FIG. By arranging the protrusions 32 at different heights and positions according to the notches 34, the number of the notches 34 may be smaller than the number of the protrusions 32.

  Furthermore, the brake diagnosis apparatus has been described so far, which employs the motion conversion means 30 in which the protrusion 31 is provided on the core 31 on the plunger 27 and the notch 34 is provided on the rotational force biaser 33. As shown in FIG. 12, a notch 35 is provided in the core 31 at the top of the plunger 27. As shown in FIG. 13, the notch 35 provided in the core 31 at the top of the plunger 27 is engaged inside the rotational force biasing device 33. A brake diagnosis device that employs the motion conversion means 30 having the inward projection 36 to be provided may be employed. In this case, since the protrusion 36 provided inside the rotational force urging device 33 does not rotate, the scales 51 and 52 and auxiliary scales of FIG. 6 are formed on the upper surface of the core 31 of the rotating plunger 27 as shown in FIG. Scales 54 and 55 corresponding to 53 and an auxiliary scale 56 may be provided to diagnose the rotation angle. Further, the rotation angle may be detected by coloring the upper surface of the core 31 above the plunger 27 as described in FIGS.

  In this case, the motion conversion means 30 includes a core 31 provided above the plunger 27 of the electromagnetic brake of the elevator hoist and a rotational force provided so as to surround the core 31 above the excitation coil cover 29. The urging device 33 includes a protrusion 36 provided inside the rotational force urging device 33 and a notch 35 that engages the protrusion 36 provided on the outer periphery of the core 31.

  Thus, according to the brake diagnosis apparatus according to the first embodiment of the present invention, the plunger is provided on the upper part of the plunger of the electromagnetic brake of the elevator hoist and the upper part of the excitation coil cover, and is controlled by the excitation control of the excitation coil. The motion conversion means for converting the stroke of the vertical motion of the motor into the rotation amount of the rotary motion, the rotation amount of the rotary motion converted to the motion conversion means is detected, and the electromagnetic brake of the elevator hoisting machine is detected based on the detected rotation amount Diagnostic means for diagnosing the state of the vehicle, and reporting means for issuing a maintenance check request to a predetermined contact when the diagnostic means diagnoses that there is an abnormality in the state of the electromagnetic brake of the elevator hoist Furthermore, the diagnostic means picks up the image of the rotational movement converted by the movement conversion means from above, and the imaging means picks up the image after maintenance of the electromagnetic brake of the elevator hoist. Image recording means for recording a quasi-image, image processing means for detecting the amount of rotation by performing image processing based on the reference image recorded by the image recording means and the diagnostic image captured by the imaging means during operation of the elevator, The state determination means for diagnosing the state of the electromagnetic brake of the elevator hoisting machine based on the rotation amount detected by the image processing means is included, so that occurrence of an abnormality in the plunger stroke of the electromagnetic brake of the elevator hoisting machine It is possible to provide a brake diagnostic device that can always diagnose the above.

  Moreover, according to the brake diagnostic apparatus which concerns on Embodiment 1 of this invention, the brake diagnostic apparatus which can be easily retrofitted also to the electromagnetic brake of the existing elevator hoisting machine can be provided.

Embodiment 2. FIG.
In the first embodiment of the present invention described above, the vertical motion of the plunger of the electromagnetic brake is converted into a circular motion of the core, and the stroke of the vertical motion is replaced with the amount of rotation of the circular motion proportional to the stroke. Although the brake diagnosis apparatus has been described in which an imaging unit is introduced and an abnormality is detected in the rotation amount detected from the image processing of the captured diagnostic image, in Embodiment 2 of the present invention, the rotation amount is included in the diagnosis unit. A case will be described in which detection means (for example, a rotary encoder) is introduced, and if there is an abnormality in the rotation amount based on the measured value of the detected current or voltage, a notification is issued.

  FIG. 15 is a view in which a rotation amount detecting means 71 is provided on the upper part of the rotational force biasing device 33. Here, the components from the brake wheel 21 to the brake lever 26 shown in FIG. 2 are not shown.

  In the figure, the rotation amount detection means 71 (rotary encoder) is a current or voltage proportional to the rotation amount, which is the amount of rotation converted by the motion conversion means 30 provided on the plunger 27 and the excitation coil cover 29. Detect as measured value. The measured value storage means 72 stores, as a reference value, a measured value of current or voltage that is proportional to the rotation amount in the normal state immediately after maintenance detected by the rotation amount detection means 71. The state determination means 73 compares the measured value of the current or voltage proportional to the rotation amount detected by the rotation amount detection means 71 during the elevator operation with the reference value stored in the measurement value storage means 72, and the difference is predetermined. If it is greater than or equal to the value, it is determined as abnormal (non-normal), and an instruction is issued to the reporting means 107. When instructed by the state determination unit 64 to issue a notification, the notification unit 107 issues a notification to a monitoring center or maintenance personnel via a communication unit (not shown).

  The rotation amount detecting means 71 is provided on the upper part of the motion converting means 30 and is connected to the core 31 of the extended plunger 27, and the rotation angle of the core 31 is measured as a measured value of current or voltage proportional to the rotation amount. Detect the size.

  The measured value storage means 72 does not store only a reference value that is a measured value of current or voltage proportional to the rotation amount in a normal state immediately after maintenance, but always stores a current or voltage proportional to the diagnosed rotation amount. The measured value may be recorded, and the recording capacity may be limited, so the measured value of current or voltage proportional to the recorded amount of rotation after a predetermined time has elapsed, or abnormal (unnormal) The measured value of the current or voltage proportional to the rotation amount that has not been detected may be deleted without being recorded. At the time of resetting the reference value after maintenance maintenance at the time of periodic maintenance or detection of an abnormal state (non-normal state), other recorded measurement values of current or voltage proportional to the recorded rotation amount may be deleted. The measured value of current or voltage proportional to the recorded amount of rotation may be deleted manually by maintenance personnel at the maintenance site, or may be deleted remotely from the maintenance center. You may make it back up to the recording means.

  Further, the state determination unit 73 compares the measured value of the current or voltage detected by the rotation amount detection unit 71 with the reference value stored by the measurement value storage unit 72, and if the difference is equal to or greater than a predetermined value, an abnormality is detected. Diagnose the condition (unnormal condition), but if a second predetermined value is provided and if the abnormal condition exceeds the second predetermined value (non-normal condition), the elevator operation is stopped immediately for safety. It may be ensured.

  The measurement value storage means 72 may store a table that refers to the rotation amount (rotation angle) from the magnitude of the current or voltage, and may convert the rotation amount into a rotation amount and store the state determination means 73. The abnormal state (non-normal state) may be diagnosed from the difference between the rotation amount stored in the measured value storage means 72 and the rotation amount converted from the current or voltage detected by the rotation amount detection means 71. .

  As described above, according to the brake diagnosis apparatus according to the second embodiment of the present invention, the plunger is provided on the upper part of the plunger of the electromagnetic brake of the elevator hoist and the upper part of the excitation coil cover, and is controlled by the excitation control of the excitation coil. The motion conversion means for converting the stroke of the vertical motion of the motor into the rotation amount of the rotary motion, the rotation amount of the rotary motion converted to the motion conversion means is detected, and the electromagnetic brake of the elevator hoisting machine is detected based on the detected rotation amount Diagnostic means for diagnosing the state of the vehicle, and reporting means for issuing a maintenance check request to a predetermined contact when the diagnostic means diagnoses that there is an abnormality in the state of the electromagnetic brake of the elevator hoist Further, the diagnosis means includes a rotation amount detection means for detecting the magnitude of the rotation amount of the rotational motion converted by the motion conversion means as a measured value of a current or voltage proportional to the rotation amount. Measurement value storage means for storing the measured value of the current or voltage detected by the rotation amount detection means after maintenance of the electromagnetic brake of the elevator hoist as a reference value, and the reference value recorded by the measurement value storage means and during operation of the elevator The state determination means for diagnosing the state of the electromagnetic brake of the elevator hoisting machine based on the measured value of the current or voltage detected by the rotation amount detecting means is included. It is possible to provide a brake diagnostic apparatus that can always diagnose occurrence of a jar stroke abnormality.

  Moreover, according to the brake diagnostic apparatus according to the second embodiment of the present invention, it is easy to retrofit the electromagnetic brake of an existing elevator hoisting machine as in the brake diagnostic apparatus according to the first embodiment of the present invention. A brake diagnostic device can be provided.

  As described above, according to the brake diagnosis apparatus of the present invention, the plunger is provided on the upper part of the plunger of the electromagnetic brake and the upper part of the excitation coil cover of the elevator hoisting machine. The motion conversion means for converting the stroke into the rotation amount of the rotary motion, and the rotation amount of the rotary motion converted into the motion conversion means are detected, and the state of the electromagnetic brake of the elevator hoisting machine is diagnosed based on the detected rotation amount And when the diagnosis means diagnoses that there is an abnormality in the state of the electromagnetic brake of the elevator hoisting machine, it is provided with a notification means for issuing a request for maintenance inspection to a predetermined contact. It is possible to provide a brake diagnostic device capable of always diagnosing the occurrence of a plunger stroke abnormality of an electromagnetic brake of an elevator hoist.

  Moreover, according to the brake diagnostic apparatus which concerns on this invention, the brake diagnostic apparatus which can be easily retrofitted also to the electromagnetic brake of the existing elevator hoisting machine can be provided.

  In addition, according to the brake diagnostic device of the present invention, if there is an abnormality due to the notification of the diagnostic result, it becomes possible to perform immediate maintenance without waiting and waiting for the next periodic inspection. , Quality of maintenance work and service can be improved. In addition, by introducing this brake diagnostic device, it is possible to flexibly adjust the interval between periodic inspections by maintenance personnel while maintaining the safety of elevator operation and the quality of maintenance work.

  In addition, according to the brake diagnosis apparatus according to the present invention, the occurrence state of the plunger stroke of the electromagnetic brake of the elevator hoisting machine can be grasped in advance through constant diagnosis, so detailed planning and narrowing down of maintenance items and processes can be performed. This is effective in reducing the time and efficiency of regular maintenance work by maintenance personnel. In addition, by installing this brake diagnostic device, the number of maintenance personnel can be increased with the same number of maintenance personnel as before installation, or the same number of elevator maintenance as before the introduction can be handled with fewer maintenance personnel. Will be able to.

  DESCRIPTION OF SYMBOLS 10 Electromagnetic brake, 11 Elevator hoisting machine (motor), 12 Elevator (cage), 21 Brake wheel, 22 Push spring, 23 Brake arm, 24 Friction material, 25 Bolt, 26 Brake lever, 27 Plunger, 28 Excitation coil, 29 Excitation coil cover, 30 motion conversion means, 31 cores, 32, 36 protrusions, 33 rotational force energizer, 34, 35 notch, 41 plunger stroke, 51, 52, 54, 55 scale, 53, 56 auxiliary scale 61 imaging means (camera) 62 image recording means 63 image processing means 64 state determination means 71 rotation amount detection means (rotary encoder) 72 rotation amount storage means 73 state determination means 101 brake wheel 102 brake Wheel rotation suppression means, 103 excitation means, 1 4 the plunger, 105 motion converting means, 106 diagnostic means, 107 alarm means.

Claims (10)

A motion converting means provided on the upper part of the plunger of the electromagnetic brake of the elevator hoist and the upper part of the excitation coil cover, and for converting the stroke of the vertical movement of the plunger by the excitation control of the excitation coil into the rotation amount of the rotary movement;
Diagnosing means for detecting the amount of rotation of the rotary motion converted to the motion converting means, and diagnosing the state of the electromagnetic brake of the elevator hoisting machine based on the detected amount of rotation;
A brake diagnostic apparatus comprising: a reporting unit that issues a request for maintenance and inspection to a predetermined contact when the diagnostic unit diagnoses that there is an abnormality in the electromagnetic brake state of the elevator hoist. The motion conversion means includes
A core provided on the plunger top of the electromagnetic brake of the elevator hoist;
A rotational force energizer provided to surround the core at the top of the excitation coil cover;
A protrusion provided outward from the core;
The brake diagnostic device according to claim 1, further comprising a notch that engages the protrusion provided inside the rotational force urging device. The motion conversion means includes
A core provided on an upper part of a plunger of an electromagnetic brake of the elevator hoisting machine;
A rotational force energizer provided to surround the core at the top of the excitation coil cover;
A protrusion provided on the inside of the rotational force biasing device;
The brake diagnostic apparatus according to claim 1, further comprising a notch that engages the protrusion provided on an outer periphery of the core. The diagnostic means includes
Imaging means for imaging the rotational motion converted by the motion conversion means from above;
Image recording means for recording a reference image captured by the imaging means after maintenance of the electromagnetic brake of the elevator hoist;
Image processing means for detecting the amount of rotation by performing image processing based on a reference image recorded by the image recording means and a diagnostic image captured by the imaging means during operation of an elevator;
The state determination means for diagnosing the state of the electromagnetic brake of the elevator hoisting machine based on the rotation amount detected by the image processing means. Brake diagnostic device. The imaging means takes an image of a circle colored in two colors centered on a rotational axis of the rotational movement provided on the upper surface of the core, with two radii as a boundary, from above,
The brake diagnosis apparatus according to claim 4, wherein the image processing unit detects the rotation amount based on a difference image between the reference image and the diagnostic image. The image processing means detects an area of a sector area of the difference image that is proportional to the rotation amount,
6. The brake diagnosis apparatus according to claim 5, wherein the state determination unit diagnoses a state of an electromagnetic brake of the elevator hoisting machine based on an area of a sector area of the difference image.   The brake diagnosis apparatus according to claim 6, wherein the image processing unit detects the area of the sector area of the difference image as the number of pixels in the sector area of the difference image.   The brake diagnosis apparatus according to claim 7, wherein the image processing unit detects the number of pixels in the sector area of the difference image as the number of non-zero pixels in the difference image.   9. The reporting means attaches a diagnostic image when the diagnostic means diagnoses that there is an abnormality in the electromagnetic brake state of the elevator hoist at the time of reporting. The brake diagnostic apparatus in any one of. The diagnostic means includes
Rotation amount detection means for detecting the amount of rotation of the rotational motion converted by the motion conversion means as a measured value of current or voltage proportional to the rotation amount, and detection of the rotation amount after maintenance of the electromagnetic brake of the elevator hoist A measured value storage means for storing the measured value of the current or voltage detected by the means as a reference value;
State determination for diagnosing the state of electromagnetic brake of the elevator hoisting machine based on the reference value recorded by the measured value storage means and the measured value of current or voltage detected by the rotation amount detecting means during operation of the elevator 4. The brake diagnosis apparatus according to claim 1, further comprising: means.

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