JP2002348068A - Rope diagnosing device of elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rope diagnosing device of an elevator capable of earlier detecting the damage to the cover body of a main rope. SOLUTION: In the rope diagnosing device of the elevator for automatically diagnosing the life of the main rope 3 covered with the cover body formed of a resin or rubber, having wires a part or all of which are conductive a pulley allowing the main rope 3 to be wound thereon, for example, a sheave 1 is connected to one terminal of a power device 101, and the conductive wires of the main rope 3 are connected to the other terminal of the power supply device 101 through a power supply-to-rope end connection wire 22. The device comprises a current detector 20 for detecting a current flowing through a circuit formed of the power supply device 101, the sheave, and the conductive wires of the main rope 3, thereby, when the cover body of the main rope is ruptured, namely, in early stage before the wires are broken, the damage to the cover body can be detected, and the life diagnosing accuracy of the main rope can be increased more than before.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator rope diagnostic apparatus capable of automatically diagnosing the life of a main rope covered with a resin or rubber covering.

[0002]

2. Description of the Related Art In general, an elevator main rope employing a steel wire rope is used when the number of cut wires exceeds a certain percentage of the total number of wires or when the number of worn wires is reduced. When the cross-sectional area of the rope increases and decreases by a certain amount or more compared to the original cross-sectional area, the life is determined by visually detecting the case. However, when the number of elevator ropes is large, or when the stroke of the elevator is long,
Sometimes it took too much time and labor.

On the other hand, resin-coated steel wire ropes and chemical fiber rope elevator main ropes, which have recently been adopted for downsizing of sheaves and downsizing of drive motors, have traction between ropes and sheaves. The coating plays an important role in performance and rope life,
It is indispensable not only to detect wire breakage but also to detect damage to the covering. However, it is difficult to visually detect the disconnection of the main rope because the strand is covered with the covering. Further, it is a fact that it is difficult to visually determine the damage of the coating itself.

[0004] Under these circumstances, as a conventional technique for improving the efficiency of wire breakage detection or damage detection of a sheath, a technique in which a magnetic flaw detection technique is applied to a steel wire rope is disclosed in, for example, Japanese Patent Application Laid-Open No. 2000-2000. No. 241393. In the case where a resin-coated chemical fiber rope is a main rope, a copper wire is buried in the coating, and a coating damage is diagnosed by detecting a cut of the copper wire. It is disclosed in the gazette.

[0005]

According to the first prior art, when the main rope is a steel wire rope, the detection of a reduction in the cross-sectional area due to a broken wire or abrasion of the wire is compared with visual inspection. It is advantageous because it can be automated. However, it is not possible to detect damage to the resin-coated main rope covering.

Further, the second prior art is advantageous as compared with the first prior art because it can be automated as compared with visual observation, but the covering made of resin is completely broken, and the embedded copper wire is further damaged. Until cutting, damage to the coating cannot be detected. Therefore, there is a problem that the accuracy of damage detection of the covering, that is, the rope life diagnosis system is easily deteriorated.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide an elevator rope diagnostic apparatus capable of detecting damage to a main rope covering at an early stage.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an elevator for automatically diagnosing the life of a main rope in which a part or the whole of a wire is conductive and covered with a covering. The above-mentioned rope diagnostic device is characterized in that a detector for detecting an amount of electrical connection between the pulley around which the main rope is wound and a conductive element wire of the main rope is provided.

Further, in an elevator rope diagnostic apparatus for automatically diagnosing the life of a main rope covered with a covering, a part or the whole of a wire is electrically conductive, the pulley around which the main rope is wound is provided. A detector for connecting a conductive wire of the main rope to one terminal of a power supply to the other terminal of the power supply and detecting a current flowing in a circuit formed by the power supply, the pulley, and the conductive wire; It is characterized by having.

[0010] With the above construction, the present invention allows the detector to immediately detect when the main rope covering is broken, when the covering is broken. That is, damage to the coating can be detected early.

[0011]

FIG. 1 is a perspective view of an elevator apparatus provided with a first embodiment of the present invention. This figure 1
Shows a 2: 1 roping elevator system.

As shown in FIG. 1, a main rope 3 is wound around a sheave 1 and a deflector 2 which are drive pulleys provided on an output shaft of a hoist (not shown), and further a car 4 and a counterweight. 5, a rope pulley 33, a thimble rod 34, and an elastic member 35 at both ends, as shown in FIG.
Are connected to the rope end supporting members 8 through the respective members. 32 is a rope clip. In such an elevator mechanism system, the position of the car 4 is controlled up and down by controlling the speed of the hoist by an elevator drive control device (not shown).

In the first embodiment, the main rope 3
Is a steel wire rope covered with a coating made of resin or rubber, and the sheave 1 is made of a conductive material. The principle of detecting damage to the covering of the main rope 3 in the first embodiment will be described with reference to FIG.

As shown in FIG. 2, all the main ropes 3 are connected to the main ropes 3 via power / rope-end connecting wires 22.
Are connected to one terminal of the power supply device 101, and the other terminal of the power supply device 101 and the sheave 1 are connected to each other.
A circuit is formed by connecting the slip ring 24, the sheave shaft 23, and the power / sheave connection wire 21. As a result, when the sheath of the main rope 3 is damaged and the bare wire comes into contact with the sheave 1, the circuit is closed by a path shown by a dotted line in FIG. Flows. By detecting this current with an ammeter, that is, a current detector, and comparing it with a reference value, it is possible to determine damage to the coating. This determination will be described below with reference to FIG. In addition, in FIG. 2, 30 has shown the main rope 3 which does not produce damage to a covering.

As shown in FIG. 1, sheave 1 and main rope 3
Of the electrical connection state between the element and the element, for example, the diagnostic control unit 1
00, the current value detected by the current detector 20 is
The output of the reference value generator 102 is compared with the comparator 103 to determine the degree of damage to the coating of the main rope 3 by the determiner 104. In this determination, when it is determined that the rope replacement time is approaching due to the damage of the covering or that it is time to replace the rope, the alarm 105 can notify the elevator maintenance staff or the administrator. Further, the diagnostic control unit 100 outputs a car position signal output unit 106 and a car position detector 1 provided in an elevator drive control device (not shown) so as to output the car position simultaneously with the generation of the damage determination of the covering.
07, a data output unit 108. This allows
Because the location of the damage to the car and the car position are linked,
The damaged position of the coating can be accurately known. In addition, the damage determination data of these coverings and the car position data associated therewith are stored in, for example, a memory in the diagnostic control unit 100 or an elevator drive control device, and can be reproduced at any time, so that the main rope can be reproduced. In addition to knowing the aging of the coating of No. 3, it can be used for predicting the life of the coating.

In the first embodiment, the connection between the wire included in the main rope 3 at the rope end and the connection wire 22 between the power supply and the rope end is performed, for example, as shown in FIG.
This may be performed via the rope end / wire connecting member 25 adhered to the rope end where the coating has been peeled off, and when the stripped portion is arranged inside the rope socket 33, FIG. As shown, the conductive thimble rod 34
Alternatively, the power / rope end connection electric wire 22 may be connected via a thimble rod / electric wire connection member 26.

Although the covering is peeled off in FIGS. 3 and 4, the inside of the rope end / wire connecting member 25 or the rope socket 33 may have a structure capable of breaking through the rope covering.

Further, in this embodiment, the current is detected as the detection of the electric machine connection state quantity, and the damage of the covering of the main rope 3 is determined according to the current value. However, the present invention is not limited to this. Alternatively, a detector for detecting the resistance value or the potential difference at the end of the sheave rope may be provided, and the determination may be made in accordance with the detection value detected by the detector. In addition, the pulley is not limited to the sheave 1 which is a driving pulley, and any pulley around which the main rope can be wound may be used.

Next, a second embodiment of the present invention is shown in FIG. Only different points from the first embodiment of FIG. 1 will be described. The difference from the first embodiment shown in FIG. 1 is that a current detector 20 is provided for each of the power supply / rope end connection wires 22, and the output of each of these current detectors 20 and the output of the reference value generator 102 are Is provided in the comparator 103 for individually comparing. With this configuration, it is possible to detect the main ropes 3 one by one, and it is possible to identify the main ropes 3 whose coatings are damaged.

FIG. 6 shows a third embodiment of the present invention. Only different points from the first embodiment of FIG. 1 will be described. The difference from the first embodiment of FIG. 1 is that the output of the damage determination of the covering of the determiner 104 included in the diagnostic control unit 100 and the output of the car position detector 107 associated therewith are
The point is that an automatic rope maintenance operation device 109 for automatically operating the elevator is provided so that the damaged portion of the coating of the main rope 3 is located at a position where it is easy to perform maintenance and inspection. Thereby, the inspection of the covering of the main rope 3 at the time of maintenance inspection is labor-saving. The above-mentioned automatic operation is performed at the time of maintenance and inspection. However, if it is determined that the rope covering damage is large and immediate inspection is necessary, the elevator can be automatically stopped after the passenger is dropped off. . At this time,
It is convenient to notify the elevator maintenance inspector or manager by the alarm 105.

In each of the above-described embodiments, the steel wire rope covered with the covering is used as the main rope 3. However, the present invention is not limited to this. It may be a rope in which a conductive element made of carbon fiber or the like is embedded, or a chemical fiber rope in which the conductive element is embedded.

In each of the above embodiments, the present invention is applied to a 2: 1 roping elevator. However, the present invention is applicable regardless of the type of roping. Moreover, the present invention can be applied to an elevator in which the hoist and the sheave are installed in a hoistway, regardless of the installation location.

Further, in each of the above-described embodiments, the diagnosis control unit 100 may be built in an elevator drive control device (not shown), or may be a separate type that can be carried at the time of maintenance and inspection. In any case, a part may be formed by microcomputer software, or all may be formed by hardware. When incorporated in the elevator drive control device, the automatic operation of the car 4 can be performed to a position where maintenance and inspection of the damaged portion of the covering of the main rope 3 can be easily performed, so that the rope inspection work is further reduced in labor.

Further, since the main rope 3 is made of a steel wire, a conductive element wire is also disposed on the outermost layer. However, as described above, a chemical fiber rope in which the conductive element element is embedded is used. In this case, it is convenient to arrange the conductive element wires in a layer between the other element wires made of chemical fibers and the covering.

[0025]

According to the present invention, when the covering of the main rope is broken by the detector, that is, at an early stage before the wire breaks, the damage of the covering can be detected. The service life diagnosis system can be improved compared to the conventional system, and the service life of the rope can be diagnosed.

Further, the present invention is configured such that the present invention is incorporated in the elevator drive control device, so that automatic operation can be realized up to a position where maintenance and inspection of a damaged portion of the main rope can be easily performed, and furthermore, the life of the main rope can be diagnosed. Labor can be saved.

[Brief description of the drawings]

FIG. 1 is a perspective view of an elevator apparatus provided with a first embodiment of the present invention.

FIG. 2 is an explanatory diagram illustrating a principle of detecting the life of a coating of a main rope according to the first embodiment of the present invention.

FIG. 3 is a perspective view showing a connection configuration of a rope end included in the first embodiment of the present invention.

FIG. 4 is a perspective view showing another example of the connection configuration of the rope ends included in the first embodiment of the present invention.

FIG. 5 is a perspective view of an elevator apparatus provided with a second embodiment of the present invention.

FIG. 6 is a perspective view of an elevator apparatus provided with a third embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Sheave, 2 ... Warp wheel, 3 ... Main rope, 4 ... Car, 5 ... Balance weight, 6 ... Car pulley, 7 ... Balance weight pulley, 8 ... Rope end support member, 20 ... Current detector, 21 ...
Connection wire between power supply and sheave, 22 Connection wire between power supply and rope end, 23 Sheave shaft, 24 Slip ring, 25
Rope end / wire connection member, 26: thimble rod / wire connection member, 33: rope socket, 34: thimble rod, 35: elastic member, 100: diagnostic control unit, 101: power supply device, 102: reference value generator, 103 ... Comparator, 10
4: Judgment device, 105: alarm device, 106: car position signal output device, 107: car position detector, 108: data output device, 109: rope maintenance automatic driving device.

 ────────────────────────────────────────────────── ─── Continued from the front page (72) Inventor Hiromi Inaba 7-1-1, Omika-cho, Hitachi City, Ibaraki Prefecture F-term in Hitachi Research Laboratory, Hitachi Ltd. 3F304 BA09 3F305 BB02 BC36

Claims (7)

[Claims] 1. A part or whole of a strand is conductive,
In an elevator rope diagnostic device for automatically diagnosing the life of a main rope covered with a coating, an electric connection state quantity between a pulley around which the main rope is wound and a conductive element wire of the main rope is determined. An elevator rope diagnostic device comprising a detector for detecting. 2. A part or whole of a strand is conductive,
An elevator rope diagnostic apparatus for automatically diagnosing the life of a main rope covered with a coating, wherein a pulley around which the main rope is wound is connected to one terminal of a power supply, and a conductive element wire of the main rope is connected to the power supply. A detector connected to the other terminal of the elevator and detecting a current flowing in a circuit formed by the power supply, the pulley, and the conductive element wire. 3. The alarm according to claim 1, wherein an alarm is issued in accordance with a result of comparison between an output of the detector and an output of a reference value generator, and an elevator car according to the result of comparison. An elevator rope diagnostic device comprising a car position detector for detecting a position and a data output device for outputting the detected car position. 4. The elevator rope diagnostic apparatus according to claim 1, wherein the conductive element wire includes at least one of a steel wire, a copper wire, and a carbon fiber. 5. The elevator according to claim 1, wherein the conductive wire is disposed on an outermost layer of the rope or a layer between the covering and another wire. Rope diagnostic device. 6. An elevator rope diagnosis according to claim 3, further comprising an automatic rope maintenance device for controlling an elevator car position in accordance with the comparison result and an output of the car position detector. apparatus. 7. The elevator rope diagnostic apparatus according to claim 1, wherein the elevator rope diagnostic apparatus is incorporated in an elevator drive control device that controls the elevation of the car.