JP5981587B1 - Hoisting machine system with break diagnosis device - Google Patents

Abstract

There is no need to bring in a breakage diagnosis device, and a breakage diagnosis of a rope can be easily performed in a short time by remote control. A hoisting machine with a breakage diagnosing device includes a hoisting machine, an additional sheave, and a breakage diagnosing device that is provided in at least one of the hoisting machine and the additional sheave. 20 and a control unit 13 that drives and controls the hoisting machine 11 and the breakage diagnostic device 20. The breakage diagnosing device 20 diagnoses the breakage of the main rope 14 by detecting the magnetic body 21 in contact with the main rope 14, the magnetizing portion 22 that magnetizes the magnetic body 21, and the leakage flux of the magnetic flux generated in the main rope 14. And a detection unit 23 for sending a detection signal to the control unit 13. At least the magnetic body 21 of the fracture diagnosis device 20 is built in the drive sheave 16 or the additional sheave 12. [Selection] Figure 2

Description

  The present embodiment relates to a hoisting machine system with a break diagnosis device.

  Conventionally, as an apparatus for diagnosing breakage of a main rope in an elevator apparatus, for example, an apparatus described in Patent Document 1 is known. When performing maintenance management, an operator attaches such a device to a sheave of an elevator device. This makes it possible to diagnose rope damage in situ using the leakage flux method.

JP 2010-111456 A

  However, when using the apparatus described in Patent Document 1, an operator must bring a breakage diagnostic instrument to the site and install it. In this way, when an operator brings a diagnostic device to the site, for example, only during maintenance management several times a year, the state of the rope breakage will be diagnosed, and there is a risk that the strand breaks if the rope breakage progresses quickly There is. In addition, the time taken to bring the breakage diagnostic device and perform the diagnostic work becomes long, and the elevator cannot be used during that time.

  The present embodiment has been made in consideration of such points, and it is not necessary to bring in a breakage diagnosis device, and with a breakage diagnosis device that can easily perform a breakage diagnosis of a rope in a short time by remote control. An object is to provide a hoisting machine system.

The present embodiment includes a hoisting machine having a drive sheave on which a main rope is stretched,
An additional sheave spanned by the main rope;
A breakage diagnosing device provided on at least one of the drive sheave and the additional sheave to diagnose breakage of the main rope;
A control unit for driving and controlling the hoisting machine and the breakage diagnostic device,
The breakage diagnostic device detects and detects a breakage of the main rope by detecting a magnetic body in contact with the main rope, a magnetizing portion for magnetizing the magnetic body, and a leakage magnetic flux generated in the main rope. A detection unit that sends a signal to the control unit,
At least the magnetic body of the breakage diagnosis device is built in the drive sheave or the additional sheave.

FIG. 1 is an overall view of an elevator apparatus including the present embodiment. FIG. 2 is a perspective view of a hoisting machine system with a breakage diagnosis device according to the present embodiment. FIG. 3 is a view of the drive sheave provided with the fracture diagnostic device as seen from the direction A in FIG. FIG. 4 is a flowchart showing the operation of the hoisting machine system with a breakage diagnosis device in the present embodiment.

  Hereinafter, this embodiment will be described with reference to the drawings. In the drawings attached to the present specification, for the sake of illustration and ease of understanding, the scale, the vertical / horizontal dimension ratio, and the like are appropriately changed and exaggerated from those of the actual product.

First, an elevator apparatus 1 incorporating a hoisting machine system 10 with a breakage diagnosis device according to the present invention will be described with reference to FIG.
As shown in FIG. 1, an elevator apparatus 1 is connected to a car 3 that moves up and down in a hoistway 2, and a main rope 14 that spans the hoisting machine 11 and an additional sheave 12. 2 and a counterweight 4 that moves up and down in the interior.

Among these, the hoisting machine 11 has a drive sheave 16 over which the main rope 14 is stretched, and the breakage diagnostic device 20 for diagnosing the breakage of the main rope 14 is provided on the drive sheave 16 of the hoisting machine 11. . The hoisting machine 11 and the breakage diagnosis device 20 are driven and controlled by the control unit 13.
Among these components, the hoisting machine 11 that shakes the drive sheave 16, the breakage diagnosis device 20, and the control unit 13 constitute the hoisting machine system 10 with a breakage diagnosis device according to the present invention.

  Further, the control unit 13 is connected to the hoisting machine 11 by a cable 15, and the control unit 13 can be remotely operated from a management room (not shown) separated from the elevator apparatus 1.

Next, the fracture diagnosing device 20 will be described with reference to FIG. As shown in FIG. 3, the fracture diagnosing device 20 is in contact with the main rope 14, and the drive sheave 16 made of a magnetic material, the magnetized portion 22 that magnetizes the drive sheave 16, and the leakage flux of the magnetic flux generated in the main rope 14. And a detecting unit 23 for diagnosing the breakage of the main rope 14 and sending a detection signal to the control unit 13.
Among these, the drive sheave 16 is made of a magnetic material, for example, a steel material as described above, and functions as the magnetic body 21 that is magnetized by the magnetizing unit 22. Thus, since the drive sheave 16 functions as a magnetic body made of a magnetic material, the magnetic body 21 is built in the entire drive sheave 16. Note that a part of the drive sheave 16 may be made of a magnetic material, and the magnetic body 21 may be built in a part of the drive sheave 16.
In addition, the magnetizing unit 22 includes a plurality of, for example, four permanent magnets incorporated in the drive sheave 16, and each permanent magnet 22 forms a constant magnetic field along the circumferential direction of the drive sheave 16, for example, The drive sheave 16 is incorporated at equal intervals along the circumferential direction.
As described above, the permanent magnets constituting the magnetic body 21 and the magnetized portion 22 are both built in or incorporated in the drive sheave 16, but not limited thereto, at least only the magnetic body 21 is in the drive sheave 16. The magnetizing portion 22 may be composed of an electromagnet disposed outside the drive sheave 16.
Furthermore, the detection unit 23 for detecting the leakage flux of the magnetic flux generated in the main rope 14 is arranged outside the main rope 14 spanned over the drive sheave 16, but the detection unit 23 is not limited to this. May be incorporated into the drive sheave 16.

Furthermore, the driving sheave 16 rotation position detector 30 is provided for detecting a rotational position of the drive sheave 16. The rotational position detector 30 detects the rotational position of the drive sheave 16 and sends this rotational position signal to the control unit 13. Further, the control unit 13 specifies a breakage point of the main rope 14 based on the rotation position signal that specifies the position of the main rope 14 from the rotation position detector 30 and the breakage detection signal from the detection unit 23.

  Next, the operation of the present embodiment having such a configuration will be described with reference to the flowchart of FIG.

(Step S1)
First, an operator in the management room operates the control unit 13 by remote control. At this time, the control unit 13 instructs the hoisting machine 11 and the breakage diagnosis device 20 to start breakage diagnosis of the main rope 14.

(Step S2)
Next, when a break diagnosis start is instructed from the control unit 13, the hoisting machine 11 performs driving to wind up the main rope 14 so that the car 3 reciprocates once in the hoistway 2 from a predetermined position. In the breakage diagnostic device 20, the main body 14 that passes through the magnetic body 21 and the drive sheave 16 magnetized by the magnetizing unit 22 is magnetized, and therefore when the magnetized main rope 14 is run at a low speed, the hoisting machine 11 A voltage corresponding to the time change of the leakage magnetic flux of the curved main rope 14 is generated in the detection unit 23, and thereby the detection unit 23 detects the leakage magnetic flux. Also, the rotational position detector 30 is activated to generate a rotational position signal that identifies the location of the main rope 14 being diagnosed.

(Step S 3)
The numerical data of the leakage magnetic flux detected by the detection unit 23 and the rotation position signal of the rotation position detector 30 are sent to the control unit 13 via the cable 15. A remotely operated worker can check this numerical data at any time.

(Step S4)
The control unit 13 always determines whether the numerical data of the leakage magnetic flux sent from the detection unit 23 via the cable 15 is equal to or less than a predetermined value. If all the numerical data are less than or equal to the specified value, the control unit 13 determines that there is no breakage in the main rope 14 and the breakage diagnosis ends.

(Step S5)
When the numerical data of the leakage magnetic flux sent from the detection unit 23 reaches a numerical value larger than a specified value, the control unit 13 determines that the main rope 14 is broken and determines the position from the rotational position signal from the rotational position detector 30. Is identified. In this case, the control unit 13 activates an internal protection circuit, and stops driving the hoisting machine 11 after the break diagnosis is completed. Moreover, the control part 13 notifies that the main rope 14 has a fracture | rupture and the location to the operator who is operating remotely.

  As described above, in the present embodiment, the breakage diagnosis device 20 and the rotation position detector 30 provided in the hoisting machine 11 can reliably diagnose breakage of the main rope 14. According to the present embodiment as described above, it is not necessary to bring the breakage diagnosing device to the hoisting machine side by side, and the breakage diagnosing device 20 provided in the hoisting machine 11 can be used to diagnose the breakage of the main rope 14 by remote control. It can be done easily in a short time.

  Note that various modifications can be made to the above-described embodiment.

  For example, in the present embodiment, an example in which only the magnetic body 21 is incorporated in the drive sheave 16 and the breakage diagnosis device 20 and the rotational position detector 30 are provided in the hoisting machine 11 has been described. The diagnostic device 20 and the rotational position detector 30 may be provided in the additional sheave 12 instead of the hoisting machine 11, and the breakage diagnostic device 20 and the rotational position detector 30 are provided in the hoisting machine 11 and the additional sheave 12, respectively. May be.

DESCRIPTION OF SYMBOLS 1 Elevator apparatus 2 Hoistway 3 Car 4 Counterweight 10 Hoisting machine system with a break diagnosis device 11 Hoisting machine 12 Additional sheave 13 Control part 14 Main rope 15 Cable 16 Drive sheave 20 Break diagnosis machine 21 Magnetic body 22 Magnetization part 23 Detector 30 Rotation position detector

Claims (4)

A hoisting machine having a drive sheave spanned by a main rope;
An additional sheave spanned by the main rope;
A breakage diagnosing device provided on at least one of the drive sheave and the additional sheave to diagnose breakage of the main rope;
A control unit for driving and controlling the hoisting machine and the breakage diagnostic device,
The breakage diagnostic device detects and detects a breakage of the main rope by detecting a magnetic body in contact with the main rope, a magnetizing portion for magnetizing the magnetic body, and a leakage magnetic flux generated in the main rope. A detection unit that sends a signal to the control unit,
The magnetic body and the magnetized portion are built in the drive sheave or the additional sheave and are located inside the main rope, and the detection unit is provided outside the drive sheave and the additional sheave and is outside the main rope. It located, hoist system with broken diagnoser.   A rotational position detector is provided in the drive sheave or the additional sheave, and the control unit specifies a breakage point of the main rope by a rotational position signal from the rotational position detector and a detection signal from the detection unit. The hoisting machine system with a breakage diagnosis device according to claim 1.   The hoisting machine system with a breakage diagnosing device according to claim 1 or 2, wherein the control unit stops driving the hoisting machine when a detection signal from the detection unit becomes equal to or greater than a predetermined value.   The hoisting machine system with a breakage diagnosis device according to claim 1, wherein the control unit can be remotely operated.

Images