JP2012188259A - Abnormality detecting device of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an abnormality detecting device of an elevator improved in safety.SOLUTION: The abnormality detecting device of the elevator includes a compensation rope connecting a car with a balancing weight, a compensation sheave having a winding part around which the compensation rope is wound, and a non-contact type sensor. The non-contact type sensor is provided at a position deviated outward in the width direction of the compensation sheave from a normal position where the compensation rope extending from the winding part toward the car lies, and detects the compensation rope laid at the deviated position.

Description

  Embodiments described herein relate generally to an elevator abnormality detection apparatus for detecting an abnormality.

  There are elevator control devices that improve the safety of the elevator by detecting the swing of the governor rope during an earthquake or the like.

JP 2006-124102 A

  In recent years, the number of super high-rise buildings has increased, and there has been a need for improvement in safety not only for the governor rope, but also for the compensation rope and the compensation sheave around which the rope is wound.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an elevator abnormality detection device with improved elevator safety.

  An elevator abnormality detection apparatus according to an embodiment includes a compensation rope in which a carriage and a balance weight are connected, a compensation sheave having a winding portion around which the compensation rope is wound, and the winding sheave from the winding portion. A non-contact type that is provided at a position outside the normal position of the compensation rope extending toward the car in the width direction of the compensation sheave and detects the compensation rope at the off-position. And a sensor.

The front view which showed the elevator to which the abnormality detection apparatus of the elevator concerning 1st Embodiment was applied. The front view which expanded and showed the periphery of the compensation unit of the elevator shown in FIG. The side view of the unit for compensation shown in FIG. FIG. 3 is a top view of the compensation unit shown in FIG. 2. FIG. 5 is a top view showing a state in which compensation ropes cross each other in the compensation unit shown in FIG. 4. The front view which expanded and showed the surroundings of the compensation unit of the elevator to which the abnormality detection apparatus of the elevator concerning 2nd Embodiment was applied. The side view of the unit for compensation shown in FIG. FIG. 7 is a top view of the compensation unit shown in FIG. 6. The front view which expanded and showed the surroundings of the compensation unit of the elevator which applied the abnormality detection apparatus of the elevator concerning 3rd Embodiment. The side view of the unit for compensation shown in FIG. FIG. 10 is a top view of the compensation unit shown in FIG. 9.

  Hereinafter, a first embodiment of an elevator to which an elevator abnormality detection device is applied will be described with reference to FIGS. 1 to 5.

  As shown in FIGS. 1 and 2, the elevator 11 according to the first embodiment includes a hoistway 12, a car 13 that moves up and down in the hoistway 12, and a machine room 14 that is provided above the hoistway 12. A hoisting machine 15 and a control panel 16 provided in the machine room 14, a main rope 18 wound around a main sheave 17 of the hoisting machine 15 and fixed to the car 13 at one end, A counterweight 21 fixed to the end, a deflector sheave 22 provided adjacent to the main sheave 17, a main rail that guides the raising / lowering of the car 13, a counter rail that guides the raising / lowering of the counterweight 21, Compensating rope (commonly known as a compensating rope) in which a tail cord 23 for supplying a control signal and electric power to the car 13 and a car 13 and a counterweight 21 are connected. And Npenropu) 24, compensating unit compensating rope 24 is wound (Compensating unit) includes a 25, a. The compensation rope 24 counterbalances the weight of the main rope 18 due to the change in the position of the car 13, and is opposite to the position to which the main rope 18 is connected. It is provided to connect to.

  As shown in FIGS. 2 and 3, the compensation unit 25 surrounds a compensation sheave (compensating sheave, commonly known as a compensation sheave) 26 around which the compensation rope 24 is directly wound, and the compensation sheave 26. A frame 27 having a “U” cross section and a plurality of first sensors 28 provided on the upper portion of the frame 27 are provided. A load is applied to the compensation unit 25 by a weight or the like below, and a certain tension is applied to the compensation rope 24. The compensating sheave 26 is rotatable around the axis 31. As shown in FIG. 2, in the compensation sheave 26, the lower half (arc-shaped portion) of the circumference is a winding portion 32 around which the compensation rope is actually wound. The first portion 24A and the second portion 24B of the compensating rope 24 extend upward (along the vertical direction) from both ends of the winding portion 32. In the present embodiment, there are two first sensors 28, for example.

  As shown in FIG. 3, the frame 27 includes, for example, a pair of side plates 33 that face each other and a bottom plate 34 that connects the side plates 33 at the bottom. A compensation sheave 26 is sandwiched between the side plates 33. As shown in FIGS. 2 and 3, the frame 27 has a support portion 35 having an “L” cross section at a position corresponding to a corner portion of the side plate 33 above the side plate 33, and this support portion 35. The first sensor 28 can be fixed to. The support portion 35 is fixed to the side plate 33 by, for example, screwing or welding.

  As shown in FIG. 2, one of the first sensors 28A is provided in the vicinity of the first portion 24A of the compensating rope 24 extending toward the car 13, and the other first sensor 28B is a counterweight. It is provided in the vicinity of the second portion 24B of the compensating rope 24 extending toward the front. That is, as shown in FIG. 4, one of the first sensors 28 </ b> A is provided outside the first portion 24 </ b> A of the compensating rope 24 in the width direction W orthogonal to the height direction of the compensating sheave 26. ing. More specifically, one of the first sensors 28A has a light (from a light projecting unit 28a described later) on the outside of the first portion 24A of the compensating rope 24 at the normal position by several mm to several cm. Beam).

  As shown in FIG. 4, the other 28 </ b> B of the first sensor is provided outside the second portion 24 </ b> B of the compensating rope 24 in the width direction W of the compensating sheave 26. More specifically, the other 28B of the first sensor emits light from a light projecting unit 28a, which will be described later, on the outside of the second portion 24B of the compensating rope 24 at the normal position by several mm to several cm. It is arranged to pass through.

  As shown in FIG. 4, each of the plurality of first sensors 28 includes a non-contact type (non-contact type) sensor. In the present embodiment, each of the first sensors 28 is an optical sensor (photoelectric sensor), and includes, for example, a light projecting unit 28a and a light receiving unit 28b. The first sensor 28 detects an abnormality in the position of the compensating rope 24 when the light (beam) from the light projecting unit 28a is blocked by the compensating rope 24 (see FIG. 5). The first sensor 28 is not limited to the one described above. The first sensor 28 may be, for example, a reflective optical sensor (photoelectric sensor). The first sensor 28 is not limited to an optical sensor. For example, a high-frequency transmission type, magnetic type, or capacitance type proximity switch (proximity sensor), an ultrasonic switch, or the like. Any sensor can be used as long as it is a non-contact type sensor capable of detecting the compensating rope 24 at an abnormal position (displaced position), such as an (ultrasonic sensor).

  Next, the operation of the elevator 11 when the first sensor 28 detects that the compensating rope 24 is in an abnormal position will be described. Here, it is assumed that the building vibrates due to the occurrence of an earthquake or strong wind, and the compensating rope 24 is detached from the compensating sheave 26 (or the compensating ropes 24 cross each other). At this time, as shown in FIG. 5, when at least one of the first sensors 28 detects an abnormality in the position of the compensating rope 24, the control panel 16 immediately moves the car 13 to the nearest floor. The passenger is moved from the car 13 to the landing. And the control panel 16 displays that there was abnormality on the display part of the platform of each floor, and maintains the state of operation stop. In addition, a signal is sent to inform the service center that something is wrong, requesting that a service engineer be dispatched to the site. In this way, in the present embodiment, when the compensation rope 24 is dropped (or when the compensation ropes 24 cross each other), the operation of the elevator 11 is prevented from continuing and the compensation rope 24 is continued. It is possible to prevent further damage to the 24 and the compensating sheave 26.

  According to the first embodiment, the elevator abnormality detection device includes a compensation rope 24 that connects the passenger car 13 and the counterweight 21, and a compensation portion 32 that has the winding portion 32 around which the compensation rope 24 is wound. The sheave 26 and the compensating rope 24 extending from the winding portion 32 toward the car 13 or the counterweight 21 are provided at positions outside the normal position in the width direction W of the compensating sheave 26. And a non-contact type sensor for detecting the compensating rope 24 at a certain position.

  In recent years, with the increase in the number of buildings, the moving speed of the car 13 and the ropes has also been increased (for example, several hundred m / min). When an abnormality of the compensation rope 24 is detected by a contact type switch or the like, either the compensation rope 24 itself moving at a high speed or a contact type switch or the like when both are in contact with each other, or Both could be damaged. In addition, the abnormality of the compensating rope 24 may not be detected unless it is dropped or deformed so much as to cause contact with the switch or the like, and the damage may be enlarged before the detection.

  According to the above configuration, since the sensor is configured as a non-contact type, neither the compensation rope 24 nor the sensor is damaged, and an abnormality can be quickly detected. Maintenance costs can be reduced. Further, according to the above configuration, it is sufficient to provide a non-contact type sensor, and it is not necessary to install a bar or the like necessary for a contact type switch or the like, and the apparatus configuration can be simplified and miniaturized.

  The sensor is provided on the upper portion of the frame 27. According to this configuration, since the sensor can be installed with respect to the frame 27 that is normally provided on the compensation sheave 26, a structure for supporting the sensor is not required and the apparatus can be simplified. The space above can be used effectively.

  Next, a second embodiment of the elevator to which the elevator abnormality detection device is applied will be described with reference to FIGS. 6 to 8. The elevator 11 of the second embodiment is different from the first embodiment in that the compensation unit 25 includes the second sensor 41, but the other parts are common. For this reason, a different part from 1st Embodiment is mainly demonstrated, a common code | symbol is attached | subjected about a common location, and description is abbreviate | omitted.

  As shown in FIGS. 6 and 7, the compensation unit 25 includes a compensation sheave 26 around which the compensation rope 24 is directly wound, a “U” -shaped frame 27 surrounding the compensation sheave 26, and a frame 27, a plurality of first sensors 28 and a plurality of second sensors 41 provided on the upper portion of 27. Similar to the first embodiment, the lower half (arc-shaped portion) of the circumference of the compensation sheave 26 is actually a winding portion 32 around which the compensation rope 24 is wound. The first portion 24A and the second portion 24B of the compensating rope 24 extend upward (along the vertical direction) from both ends of the winding portion 32. In the present embodiment, the number of the first sensors 28 is two, for example, and the number of the second sensors 41 is two, for example.

  The frame 27 includes, for example, a pair of side plates 33 that face each other, and a bottom plate 34 that connects the side plates 33 at the bottom. The frame 27 has a support portion 35 at a position corresponding to the corner portion of the side plate 33 above the side plate 33. The support part 35 has mounting parts provided in two stages along the length direction (height direction) of the compensating rope 24. The first sensor 28 can be fixed to the first mounting portion 42 on the lower side. Further, the second sensor 41 can be fixed to the second placement portion 43 on the upper side.

  The first sensor 28 and the second sensor 41 are provided at two locations separated from each other in the length direction of the compensating rope 24. In this embodiment, the sensors are provided at two locations separated from each other in the length direction of the compensation rope 24. However, the sensors may be provided at three or more locations, for example. Further, the support portion 35 in which the first placement portion 42 and the second placement portion 43 are integrated is fixed to the side plate 33 by, for example, screwing or welding.

  As shown in FIG. 6, one first sensor 28 </ b> A is provided in the vicinity of the first portion 24 </ b> A of the compensating rope 24 extending toward the car 13, and the other first sensor 28 </ b> B is a counterweight. 21 is provided in the vicinity of the second portion 24 </ b> B of the compensating rope 24 that extends toward 21. That is, as in the first embodiment shown in FIG. 4, one of the first sensors 28 </ b> A has a first portion 24 </ b> A of the compensating rope 24 in the width direction W orthogonal to the height direction of the compensating sheave 26. It is provided outside. More specifically, one of the first sensors 28 </ b> A emits light (beam) from the light projecting unit 28 a outside the first portion 24 </ b> A of the compensating rope 24 at the normal position by several mm to several cm outside. It is arranged to pass through.

  The other 28B of the first sensor is provided outside the second portion 24B of the compensating rope 24 in the width direction W of the compensating sheave 26. More specifically, the other 28B of the first sensor passes light from the light projecting unit 28a to the outside of the second portion 24B of the compensating rope 24 at the normal position by several mm to several cm. Placed in.

  Similarly, as shown in FIG. 6, one of the second sensors 41 </ b> A is provided in the vicinity of the first portion 24 </ b> A of the compensating rope 24 extending toward the car 13, and the other 41 </ b> B of the second sensor is The compensating rope 24 extending toward the counterweight 21 is provided in the vicinity of the second portion 24B. As shown in FIG. 8, one of the second sensors 41 </ b> A is provided outside the first portion 24 </ b> A of the compensating rope 24 in the width direction W of the compensating sheave 26. That is, one side 41A of the second sensor is arranged to pass light from the light projecting unit 41a on the outside of the first portion 24A of the compensating rope 24 at the normal position by several mm to several cm. .

  Further, the other 41 </ b> B of the second sensor is provided outside the second portion 24 </ b> B of the compensating rope 24 in the width direction W of the compensating sheave 26. In other words, the other 41B of the second sensor is arranged to pass light from the light projecting portion 41a on the outside of the second portion 24B of the compensating rope 24 at the normal position by several mm to several cm. The

  Each of the plurality of first sensors 28 and the plurality of second sensors 41 is a non-contact type (non-contact type) sensor. In the present embodiment, each of the first sensor 28 and the second sensor 41 is an optical sensor (photoelectric sensor), and includes, for example, light projecting units 28a and 41a and light receiving units 28b and 41b. The first sensor 28 and the second sensor 41 detect an abnormality in the position of the compensating rope 24 when the light (beam) from the light projecting units 28 a and 41 a is blocked by the compensating rope 24. The first sensor 28 and the second sensor 41 are not limited to this, and similarly to the first embodiment, a reflection type optical sensor (photoelectric sensor), a high-frequency transmission type, a magnetic type, or Any type of non-contact type, such as a capacitive proximity switch (proximity sensor) or an ultrasonic switch (ultrasonic sensor) may be used.

  Next, the operation of the elevator 11 when the first sensor 28 and the second sensor 41 detect that the compensating rope 24 is in an abnormal position will be described.

  For example, it is assumed that the compensation rope 24 is disengaged from the compensation sheave 26 (or the compensation ropes 24 intersect each other) due to an earthquake or a building vibrated by a strong wind. At this time, for example, if an abnormality in the position of the compensation rope 24 is detected by both the first sensor 28 and the second sensor 41, the control panel 16 causes the compensation rope 24 to move from the compensation sheave 26. It is determined that they are separated or the compensating ropes 24 cross each other. On the other hand, when an abnormality in the position of the compensation rope 24 is detected only in one of the first sensor 28 and the second sensor 41, dust that has fallen in the hoistway 12 or the compensation rope 24 is detected. It is determined that this is a false detection due to a slight shaking.

  Then, an abnormality was detected by both the first sensor 28 and the second sensor 41, and it was determined that the compensation rope 24 was removed from the compensation sheave 26 (or the compensation ropes 24 crossed each other). In this case, the control panel 16 immediately moves the car 13 to the nearest floor and moves the passenger from the car 13 to the landing. Then, the control panel 16 displays the abnormality on the display section of the landing on each floor, maintains the operation stop state and issues a signal notifying the service center that there is an abnormality, Request to dispatch an engineer.

  According to the second embodiment, the sensors are provided in at least two places separated in the length direction of the compensating rope 24. According to this configuration, even though the compensation rope 24 is not actually detached from the compensation sheave 26, so-called erroneous detection in which an abnormality is erroneously detected can be prevented, and detection accuracy can be improved. Further, when the position of a long object such as the compensating rope 24 changes, it is possible to detect an abnormal position at two points separated in the length direction. This is particularly useful for improving the accuracy of detecting a rope abnormality.

  Next, a third embodiment of an elevator to which the elevator abnormality detection device is applied will be described with reference to FIGS. 9 to 11. The elevator 11 of the third embodiment is different from the first embodiment in that the compensation unit 25 includes a third sensor 51, but the other parts are common. For this reason, a different part from 1st Embodiment is mainly demonstrated, a common code | symbol is attached | subjected about a common location, and description is abbreviate | omitted.

  As shown in FIGS. 9 and 10, the compensation unit 25 includes a compensation sheave 26 around which the compensation rope 24 is directly wound, a frame 27 having a “U” -shaped cross section surrounding the periphery of the compensation sheave 26, and a frame 27, and a plurality of third sensors 51 provided at intermediate positions in the height direction of the frame 27 (or the compensation sheave 26). . The lower half (arc-shaped part) of the circumference of the compensation sheave 26 is a winding part 32 around which the compensation rope 24 is actually wound. The first portion 24A and the second portion 24B of the compensating rope 24 extend upward (along the vertical direction) from both ends of the winding portion 32. In the present embodiment, there are two first sensors 28, for example, and there are two third sensors 51, for example.

  The frame 27 has a support portion 35 having an L-shaped cross section at a position corresponding to a corner portion of the side plate 33 at an upper portion of the side plate 33, and the first sensor 28 is fixed to the support portion 35. Can do. The support portion 35 is fixed to the side plate 33 by, for example, screwing or welding. As shown in FIG. 9, each of the side plates 33 of the frame 27 is provided with a through hole 52 through which light from a light projecting portion 51a of a third sensor 51 described later passes.

  The frame 27 has a second support portion 54 having an L-shaped cross section at a position along the side portion 53 that defines a part of the outer periphery of the frame 27 at an intermediate position in the height direction. The second support portion 54 is located below the support portion 35, and the third sensor 51 can be fixed to the second support portion 54. Each of the two third sensors 51 is disposed below each of the first sensors 28.

  As shown in FIG. 9, one of the first sensors 28A is provided in the vicinity of the first portion 24A of the compensating rope 24 extending toward the car 13, and the other first sensor 28B is a counterweight. 21 is provided in the vicinity of the second portion 24 </ b> B of the compensating rope 24 that extends toward 21. As shown in FIG. 11, one first sensor 28 </ b> A is provided outside the first portion 24 </ b> A of the compensating rope 24 in the width direction W perpendicular to the height direction of the compensating sheave 26. . One of the first sensors 28 </ b> A is arranged to pass light from the light projecting unit 28 a outside the first portion 24 </ b> A of the compensation rope 24 at the normal position by several mm to several cm.

  The other 28B of the first sensor is provided outside the second portion 24B of the compensating rope 24 in the width direction W of the compensating sheave 26. The other 28B of the first sensor is arranged to pass light from the light projecting unit 28a on the outside of the first portion 24A of the compensating rope 24 at the normal position by several mm to several cm.

  As shown in FIG. 9, one of the third sensors 51A is provided in the vicinity of one end 32A of the winding portion 32 from which the first portion 24A of the compensating rope 24 is fed, and the third sensor The other 51B is provided in the vicinity of the other end portion 32B of the winding portion 32 from which the second portion 24B of the compensating rope 24 is fed. Similarly to the one shown in FIG. 11, one of the third sensors 51 </ b> A is provided outside the first portion 24 </ b> A of the compensating rope 24 in the width direction W of the compensating sheave 26. In other words, one of the third sensors 51A is arranged to pass light from the light projecting unit 51a on the outside of the first portion 24A of the compensating rope 24 at the normal position by several mm to several cm. The

  The other 51 </ b> B of the third sensor is provided outside the second portion 24 </ b> B of the compensating rope 24 in the width direction W of the compensating sheave 26. In other words, the other 51B of the third sensor is arranged to pass light from the light projecting portion 51a on the outside of the second portion 24B of the compensating rope 24 at the normal position by several mm to several cm. The

  Each of the first sensor 28 and the third sensor 51 is configured as a non-contact type (non-contact type) sensor. In the present embodiment, each of the first sensor 28 and the third sensor 51 is an optical sensor (photoelectric sensor), and includes, for example, light projecting units 28a and 51a and light receiving units 28b and 51b. The first sensor 28 and the third sensor 51 detect an abnormality in the position of the compensating rope 24 when the light (beam) from the light projecting units 28 a and 51 a is blocked by the compensating rope 24.

  Each of the first sensor 28 and the third sensor 51 is not limited to the above, and for example, a reflection type optical sensor (photoelectric sensor), a high-frequency transmission type, a magnetic type, or a capacitance type Any non-contact type sensor such as a proximity switch (proximity sensor) or an ultrasonic switch (ultrasonic sensor) may be used.

  Next, the operation of the elevator 11 when the first sensor 28 and the third sensor 51 detect that the compensating rope 24 is in an abnormal position will be described.

  For example, it is assumed that the building vibrates due to the occurrence of an earthquake or a strong wind, and the compensating rope 24 is detached from the compensating sheave 26 (or the compensating ropes 24 cross each other). At this time, unlike the second embodiment, when an abnormality in the position of the compensation rope 24 is detected in at least one of the first sensor 28 and the third sensor 51, the control panel 16 detects the compensation sheave 26. It is determined that the compensating ropes 24 are disengaged from each other or that the compensating ropes 24 intersect each other. In particular, when an abnormality is detected by the third sensor 51, fallen objects such as dust falling in the hoistway 12 are sandwiched between the compensation sheave 26 and the compensation rope 24, and the compensation rope 24 It is determined that there is a high possibility that part of the rope is raised or the compensating rope 24 is detached from the groove 26 </ b> A of the compensating sheave 26 and overlaps the other compensating rope 24.

  Then, the control panel 16 immediately moves the car 13 to the nearest floor and moves the passenger from the car 13 to the landing. In addition, the control panel 16 displays a signal indicating that there is an abnormality on the display section of the landing on each floor to maintain the operation stop state, and also issues a signal notifying the service center that there is an abnormality, so that a service engineer is sent to the site. Request to be dispatched.

  According to the third embodiment, the sensor is provided in the vicinity of the end portions 32 </ b> A and 32 </ b> B of the winding portion 32. According to this configuration, for example, it is possible to detect the abnormality of the elevator 11 more precisely, for example, to detect the trapping of dust or the like between the compensation sheave 26 and the compensation rope 24, and the nature of the abnormality that has occurred in the elevator 11. Can be grasped at the service center to some extent before the service engineer arrives.

  The elevator 11 of the present invention is not limited to the above embodiment. That is, in each of the above-described embodiments, one first sensor 28 is disposed so as to allow light from the light projecting unit 28a to pass outside the compensating rope 24 at the normal position by several mm to several cm. However, for example, a plurality of first sensors 28 may be arranged at the same location by changing the distance from the compensating rope 24. According to this, it is possible to detect a detailed situation at the time of failure, or the degree of failure, for example, by detecting an initial deformation or dropout, or by detecting a large deformation or dropout. Of course, various modifications can be made without departing from the scope of the invention.

DESCRIPTION OF SYMBOLS 11 ... Elevator, 13 ... Ride car, 21 ... Balance weight, 24 ... Compensation rope, 24A ... First part, 24B ... Second part, 26 ... Compensation sheave, 27 ... Frame, 28 ... First sensor 32 ... A winding part, 32A ... One end part, 32B ... The other end part, 41 ... 2nd sensor, 51 ... 3rd sensor

Claims (8)

Compensation rope connecting the car and the balance weight,
A compensating sheave having a winding portion around which the compensating rope is wound;
The compensating rope that is provided at a position outside the normal position in the width direction of the compensating sheave from the normal position of the compensating rope that extends from the winding portion toward the car, and is in the detached position. A non-contact sensor to detect,
An elevator abnormality detection device comprising: Comprising a frame surrounding the compensation sheave;
The elevator abnormality detection device according to claim 1, wherein the sensor is provided on an upper portion of the frame.   The elevator abnormality detection device according to claim 2, wherein the sensor is provided in at least two places separated in the length direction of the compensating rope.   The elevator abnormality detection device according to claim 2, wherein the sensor is provided in the vicinity of an end of the winding portion. Compensation rope connecting the car and the balance weight,
A compensating sheave having a winding portion around which the compensating rope is wound;
The compensation rope that is provided at a position outside the normal position of the compensation rope extending from the winding portion toward the counterweight in the width direction of the compensation sheave, and is in the detached position A non-contact sensor to detect,
An elevator abnormality detection device comprising: Comprising a frame surrounding the compensation sheave;
The elevator abnormality detection device according to claim 5, wherein the sensor is provided on an upper portion of the frame.   The elevator abnormality detection device according to claim 6, wherein the sensor is provided in at least two places separated in a length direction of the compensation rope.   The elevator abnormality detection device according to claim 7, wherein the sensor is provided in the vicinity of an end portion of the winding portion.

Images