JPWO2018008080A1 - Elevator rope monitoring device - Google Patents

Abstract

The elevator rope monitoring device includes a control panel provided in the hoistway and a pair of first rope detachment stoppers corresponding to the first pulley, and the rope collides with the pair of first rope detachment stoppers. The control panel further includes a first collision detection sensor for detecting that the rope has been deformed when the first collision detection sensor detects that the rope has collided with both of the ropes against the pair of first rope detachment stoppers. Including a determination unit that determines that the problem has occurred.

Description

  The present invention relates to an elevator rope monitoring apparatus.

  The elevator includes a hoistway that extends vertically and a car that is movably provided in the hoistway. The car is suspended by a rope, and the car is raised and lowered by driving the rope with a hoisting machine.

  For example, Patent Document 1 discloses a technique for detecting the presence of partial deformation in a rope. Specifically, a device that uses a vibration detection sensor, time information, and car position information, detects vibration when a deformed portion of a rope collides with a rope detachment stopper, and detects an existing position of the deformed portion Is disclosed.

Japanese Patent No. 5203339

  However, in the apparatus disclosed in Patent Document 1 described above, it is necessary to run the elevator a plurality of times in order to specify the position of the deformed portion of the rope. Therefore, it is more preferable if the presence of the deformed portion of the rope can be detected in a shorter time.

  The present invention has been made in view of the above, and an object of the present invention is to provide an elevator rope monitoring device capable of detecting a rope break in a short time.

  In order to achieve the above-described object, the present invention is an elevator rope monitoring device including a control panel provided in a hoistway and a pair of first rope stoppers provided corresponding to the first pulleys. And a first collision detection sensor for detecting that a rope has collided with the pair of first rope detachment stoppers, and the control panel is configured to detect the pair of first rope detachment stoppers by the first collision detection sensors. A determination unit that determines that deformation of the rope has occurred when it is detected that the rope has collided with both.

  According to the present invention, the breakage of the rope can be detected in a short time.

It is a conceptual diagram of the elevator to which Embodiment 1 of this invention is applied. 1 is a block diagram conceptually showing an elevator rope monitoring device. It is a figure explaining the collision regarding one pulley. It is a figure which shows the relationship between the collision of the rope to a rope detachment stop, and the output of a sensor. It is a figure regarding the processing flow by the side of a sensor. It is a figure of the same aspect regarding FIG. It is a figure regarding the processing flow by the side of a control panel.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals indicate the same or corresponding parts.

Embodiment 1 FIG.
It is a conceptual diagram of the elevator to which Embodiment 1 of this invention is applied. The elevator includes a car 3, a counterweight 5, a hoisting machine 7, and a control panel 9 in the hoistway 1. In the following description, an elevator without a machine room in which the hoisting machine is arranged in the pit is taken as an example, but the present invention is not limited to this, and the hoisting machine is supported on the upper part of the hoistway. The present invention can be applied to an elevator without a machine room or an elevator having a machine room.

  The car 3 and the counterweight 5 are suspended in the hoistway by the rope 11. A plurality of car suspension wheels 13 are provided at the lower part of the car 3. Further, a weight suspension wheel 15 is provided above the counterweight 5. Further, a plurality of return wheels 17 are provided at a relatively upper portion in the hoistway. The rope 11 is wound around a car suspension wheel 13, a weight suspension wheel 15, a return wheel 17, and a sheave 19 of the hoisting machine 7 as a pulley. As a pulley, it is not limited to this, For example, the object around which the rope 11 was wound, such as a baffle, is widely used as a pulley.

  As an example, in the first embodiment, the car suspension wheel 13, the weight suspension wheel 15, the return wheel 17, and the sheave 19 are each provided with a rope detachment stop 21. The structure and installation mode of the rope detachment prevention may be as known.

  The elevator rope monitoring apparatus includes a control panel 9 and a plurality of rope detachment stoppers 21. As a minimum configuration of the present invention, the elevator rope monitoring device is provided with a pair of rope detachment stoppers provided corresponding to one pulley, but in the first embodiment, the car suspension vehicle 13, Each of the weight suspension wheel 15, the return wheel 17, and the sheave 19 is provided with a pair of rope detachment stoppers 21.

  With reference to FIG. 2, the structure of the elevator rope monitoring apparatus of the first embodiment will be described. First, a plurality of collision detection sensors 23 and a contact output unit 25 are provided on the sensor side.

  The collision detection sensor 23 is provided for each pulley, and detects that a rope has collided with a pair of rope detachment stoppers. As described above, one pulley is provided with a pair of rope detachment stoppers 21. The collision detection sensor 23 is provided in such a manner that one sensor unit is assigned to the pair of rope detachment stoppers 21, and includes one sensor unit that detects that a rope has collided with at least one of the pair of rope detachment stoppers 21. Or a pair of sensor units provided in such a manner that one sensor unit is assigned to each rope release stopper 21.

  In the first embodiment, the sensor unit is an acceleration sensor that can detect vibration.

  Detection results from these collision detection sensors 23 are input to the contact output unit 25. When a collision is detected by any of the collision detection sensors 23, the collision detection sensor 23 outputs a contact output to a calculation unit described later. To do.

  On the other hand, as the control panel side, the elevator rope monitoring apparatus according to the first embodiment includes a determination unit 27. The judgment unit 27 receives a contact output from the contact output unit 25 to the effect that there has been a collision as described above. As will be described later, the determination unit 27 determines whether or not the rope strand breaks.

  FIG. 3 is a diagram for explaining a collision related to one pulley. FIG. 4 is a diagram illustrating the relationship between the collision of the rope with the rope detachment stopper and the output of the sensor. As shown in FIG. 3, in any pulley such as a car suspension wheel 13, a weight suspension wheel 15, a return wheel 17, a sheave 19, etc., a rope 11 including a rope deforming portion 11 a that is, for example, a strand breakage, advances Suppose you are. The rope 11 travels as indicated by the arrow R. First, the rope deforming portion 11a passes through one rope slip-off stopper 21 and travels along the bend of the pulley, and further, the other rope slip-off stopper 21 pass.

  Therefore, as shown in FIG. 4, in one pulley, a first collision occurs first, and then a second collision occurs. In other words, the collision between the rope deformable portion 11a and the rope detachment stop 21 occurs twice before the rope deformable portion 11a passes through one pulley. Further, due to these collisions, the collision detection sensor 23 detects two vibrations.

  Next, the operation of the elevator rope monitoring device of the first embodiment configured as described above (a method for detecting the occurrence of rope deformation) will be described. First, as shown in FIG. 5, when vibration data is taken into the contact output unit 25 as a detection result of the collision detection sensor 23 as step S1, the contact output unit 25 detects vibration of the data as step S2. The magnitude or strength is compared with a preset threshold. In the example of the first embodiment, the amplitude of vibration data is compared with a threshold value. And the contact output part 25 performs a contact output as step S3, when the amplitude of the taken-in vibration has exceeded the threshold value.

  The determination unit 27 of the control panel 9 detects that the rope has collided with both of the pair of rope stoppers 21 corresponding to one pulley as a detection result of one collision detection sensor 23 corresponding to one pulley. Sometimes, it is determined that the rope 11 has a rope deforming portion 11a.

  In addition, after the determination part 27 determines that the rope deformation part 11a has occurred, the elevator car 3 may be stopped and an alarm may be issued to the manager or the outside.

  According to the first embodiment described above, the use of a relatively inexpensive sensor and computing means is used, and the occurrence of a rope deforming portion is avoided while avoiding erroneous detection due to vibration that can occur randomly in one run. Can be detected. Moreover, since this detection is completed in one run, the breakage of the rope can be detected in a short time. Moreover, when the foreign material adhering to a rope collides with a rope detachment stop only once, it is not recognized that the rope deformation | transformation part generate | occur | produced. Therefore, as described above, it is possible to detect the breakage of the rope in a short time, and it is possible to determine the presence or absence of a more accurate rope deformed portion. In addition, when the evaluation of vibration includes comparison with a threshold value, vibration that is always generated during normal rope travel is less likely to reduce the detection accuracy of the occurrence of the rope deformed portion.

Embodiment 2. FIG.
Next, a second embodiment of the present invention will be described. The second embodiment is the same as the first embodiment described above except for the contents described below. FIG. 6 is a diagram of the same mode as FIG.

  The elevator rope monitoring apparatus according to the second embodiment includes a calculation unit 129 and a determination unit 127 on the control panel side. Car position information 131, car speed information 133, and pulley information 135 are input to the determination unit 127 in addition to the contact output from the contact output unit 25 indicating that there has been a collision as described above.

  The operation of the elevator rope monitoring apparatus according to the second embodiment (a method for detecting the occurrence of rope deformation) will be described. In FIG. 7, when there is a contact input in the calculation unit 129 as step S4, the car position information 131 is read into the calculation unit 129 as step 5, the car speed information 133 is read as step S6, and the pulley is set as step S7. Information 135 is read. Note that the processing order of these steps S5 to S7 is not limited to the example of FIG.

  Next, as step S8, when there is a first collision with a pulley, the calculation unit 129 is based on the information on the pulley with the collision and the car speed information, from the first collision to the second collision. Calculate the collision time interval. The determination unit 27 waits for the calculated collision time interval, and monitors whether there is a contact input indicating the second collision in the pulley in which the first collision occurred during the waiting. . When there is a contact input during standby, an alarm is issued, and when there is no contact input, the first contact input is ignored. That is, the determination unit finally determines the occurrence of the rope deformation when the second collision is within the collision time interval from the first collision.

  In the second embodiment, since the car position information is also obtained, the relationship between the car position at the time of the collision and the part of the rope passing through the pulley that has collided is taken into consideration, and a rope deformed portion is generated in the rope. It is also possible to specify the part that is.

  Also according to the second embodiment, the same effects as those of the first embodiment described above can be obtained.

Embodiment 3 FIG.
Next, a third embodiment of the present invention will be described. In addition, this Embodiment 3 shall be the same as that of Embodiment 1 mentioned above except the content demonstrated below.

  As Embodiment 3, the control panel includes a calculation unit and a determination unit. After the rope collides with both of the pair of rope stoppers corresponding to the first pulley, the speed of the car is changed. After the rope collides with both of the pair of rope stoppers corresponding to the first pulley, the speed of the car is changed, and when the rope collides with both of the pair of rope stoppers corresponding to the second pulley, it is judged. The change between two collision interval times that occur between a pair of rope detents corresponding to the first pulley and two collision interval times that occur between a pair of rope detents corresponding to the second pulley Confirms the occurrence of rope deformation when relying on changes in car speed.

Embodiment 4 FIG.
Next, a fourth embodiment of the present invention will be described. In addition, this Embodiment 4 shall be the same as that of Embodiment 1 mentioned above except the content demonstrated below.

  That is, as Embodiment 4, the control panel includes a calculation unit and a determination unit, and the determination unit is based on the collision interval time actually detected by the collision detection sensor, the pulley information, and the car speed information. By comparing the length with the collision interval time calculated by the calculation unit, the pulley in which the collision has occurred is specified.

Embodiment 5. FIG.
Next, a fifth embodiment of the present invention will be described. In addition, this Embodiment 5 shall be the same as that of any of Embodiment 1-4 mentioned above except the content demonstrated below.

  In the fifth embodiment, each of the collision detection sensors includes a microphone instead of the acceleration sensor. That is, when the rope deforming portion collides with the rope detachment stop, a collision sound is generated. Therefore, the occurrence of the collision is detected by detecting the collision sound.

  Although the contents of the present invention have been specifically described with reference to the preferred embodiments, various modifications can be made by those skilled in the art based on the basic technical idea and teachings of the present invention. It is self-explanatory.

  The invention of the present application includes a combination of part or all of the configurations of any one or more of the embodiments described above with the other embodiments.

  3 car, 9 control panel, 11 rope, 13 car suspension 13 (pulley), 15 weight suspension (pulley), 17 return car (pulley), 19 sheave (pulley), 21 rope stopper, 23 collision detection sensor , 27 Judgment unit 27, 127, 133 Car speed information, 135 pulley information.

Claims (4)

A control panel provided in the hoistway;
An elevator rope monitoring device comprising a pair of first rope slip stoppers provided corresponding to the first pulleys,
A first collision detection sensor for detecting that a rope has collided with the pair of first rope detachment stoppers;
The control panel includes a determination unit that determines that the rope is deformed when the first collision detection sensor detects that the rope has collided with both of the pair of first ropes. Including,
Elevator rope monitoring device. The control panel includes a calculation unit, and when the first collision occurs, the calculation unit determines from the first collision to the second collision based on the information on the pulley that has collided and the car speed information. Calculate the collision time interval,
The determination unit determines the occurrence of deformation of the rope when the second collision is within the collision time interval from the first collision;
The elevator rope monitoring apparatus according to claim 1. A pair of second rope detachment stoppers corresponding to the second pulley;
A second collision detection sensor for detecting that the rope has collided with the pair of second rope stoppers;
After the rope collides with both of the pair of first rope stoppers, the speed of the car is changed, and when the rope collides with both of the ropes with the pair of second rope stoppers, The occurrence of deformation of the rope is determined by the change in the collision interval time related to the pair of first rope detachment prevention and the collision interval time related to the pair of second rope detachment prevention,
The elevator rope monitoring apparatus according to claim 1. A pair of second rope detachment stoppers corresponding to the second pulley;
A second collision detection sensor for detecting that the rope has collided with the pair of second rope stoppers;
The determination unit identifies the pulley in which the collision has occurred from the length of the collision interval time.
The elevator rope monitoring apparatus according to claim 1.

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