WO2005049471A1 - エレベータ用ワイヤロープ探傷装置 - Google Patents
エレベータ用ワイヤロープ探傷装置 Download PDFInfo
- Publication number
- WO2005049471A1 WO2005049471A1 PCT/JP2004/017256 JP2004017256W WO2005049471A1 WO 2005049471 A1 WO2005049471 A1 WO 2005049471A1 JP 2004017256 W JP2004017256 W JP 2004017256W WO 2005049471 A1 WO2005049471 A1 WO 2005049471A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wire rope
- flaw detector
- magnetic sensor
- elevator
- abnormality detection
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/12—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions in case of rope or cable slack
- B66B5/125—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions in case of rope or cable slack electrical
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B7/00—Other common features of elevators
- B66B7/12—Checking, lubricating, or cleaning means for ropes, cables or guides
- B66B7/1207—Checking means
- B66B7/1215—Checking means specially adapted for ropes or cables
- B66B7/123—Checking means specially adapted for ropes or cables by analysing magnetic variables
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
Definitions
- the present invention relates to a wire rope flaw detector for elevators used for maintenance of wire ropes for hanging elevator cars.
- reference numeral 1 denotes a rope to be measured
- reference numeral 2 denotes an abnormality detection unit (hereinafter, referred to as a probe) of the magnetic flaw detector.
- the probe 2 also has a magnet portion 3 for exciting the rope 1 to be measured and a sensor portion 4 for detecting a change in magnetic flux appearing on the surface of the mouthpiece 1.
- the magnet portion 3 has a magnet 5 made of a permanent magnet, a yoke 6 having a rectangular cross section, and two magnetic poles 7 a and 7 b having a U-shaped groove.
- a magnetic field is generated in the yoke 6 in the illustrated direction, and forms a magnetic path inside the rope 1 to be measured via the magnetic poles 7a and 7b.
- the rope 1 to be measured has a portion la such as disconnection or wear
- the magnetic field in the air changes in the portion la due to the leakage magnetic flux (a conceptual diagram is shown in Fig. 8)
- the rope 1 is formed in a U-shape.
- an electromotive force (signal) is generated in the magnetic sensor portion 4, and the signal is output to the processing / display portion 8.
- the maintenance person specifies the most deteriorated portion based on the displayed signal waveform, and determines the intensity of the portion. If such a flaw detector is used, the work of searching for a damaged portion can be saved, and the time required for rope maintenance work can be significantly reduced.
- a magnetically sensitive element may be used as a method other than the force using a coil (not shown).
- a coil like this, the relative speed between the rope 1 to be measured and the probe 2 is necessary, The flaw detection sensitivity is affected by the speed fluctuation, but when a Hall element is used as a detection element, an output proportional to the magnetic flux density can be obtained, and flaw detection sensitivity independent of the relative speed can be obtained.
- the small diameter wire rope refers to a wire rope having a nominal diameter of 4 mm to 8 mm.
- the diameter of the wire constituting the rope is about 0.3 mm to 0.7 mm, and it is possible to observe the disconnection with the naked eye. While reducing the diameter of the wire rope, the number of ropes increases, the wire diameter becomes thinner, and the spacing between the ropes becomes narrower than before, so maintenance work, especially work to search for deteriorated parts and strength The time required for the judgment work increases.
- the thinning of the wire generally reduces the leakage magnetic flux at the damaged portion, thereby lowering the flaw detection sensitivity.
- a ferromagnetic material such as another rope
- the ferromagnetic material is magnetized, and the magnetic sensor of the measured rope is affected to generate a noise signal other than deterioration.
- the present invention has been made in view of such a point, and in an elevator that uses a small-diameter wire rope to save space and energy, an elevator that can improve workability of wire rope maintenance.
- the present invention relates to an elevator wire rope flaw detector for detecting a damaged portion of an elevator wire rope having a nominal diameter of 4 mm to 8 mm, comprising a plurality of abnormality detecting units arranged near the wire rope.
- the detection unit has a first magnetic pole and a second magnetic pole having different polarities, and a U-shaped magnetic sensor disposed between the first magnetic pole and the second magnetic pole.
- the bottom radius of the sensor is 2 mm or more and 5 mm or less, and the difference between the bottom radius of the magnetic sensor and the nominal diameter 1Z2 of the wire rope is 1.5 mm or less, and the U-shaped magnetic sensor at the adjacent abnormality detection section
- a wire rope flaw detector for elevators characterized in that the distance between the side walls is 2 mm or more in plan view.
- the present invention is the wire rope flaw detector for elevators, characterized in that the adjacent abnormality detectors are displaced in the longitudinal direction of the wire rope.
- the present invention further includes a filter for filtering each signal output from the magnetic sensors of the plurality of abnormality detection units to remove noise other than a signal indicating deterioration of the measured wire rope,
- a filter for filtering each signal output from the magnetic sensors of the plurality of abnormality detection units to remove noise other than a signal indicating deterioration of the measured wire rope.
- the present invention further comprises means for removing a signal below a threshold value for each signal from which the magnetic sensor forces of a plurality of abnormality detection units are also output, and after removing a signal below a threshold value.
- This is a wire rope flaw detector for elevators, characterized in that all signals are added together.
- the present invention is the wire rope flaw detector for elevators, further comprising a fixture for holding and attaching each abnormality detection section to a hoistway or a predetermined location in a machine room.
- the present invention is the wire rope flaw detector for elevators, wherein the fixture for holding the abnormality detecting section is installed near the hoist.
- the abnormality is detected at a position where the side surface of the wire rope in contact with the groove surface of the drive sheave of the hoist and the bottom portion of the magnetic sensor of the abnormality detection unit are opposed to each other.
- a wire rope flaw detector for elevators characterized in that the wire rope flaw detector holds the parts.
- the present invention is the wire rope flaw detector for elevators, further comprising a fixture for holding and attaching the abnormality detecting section to the car.
- the present invention is characterized in that an analog signal is output from a plurality of abnormality detecting units, analog signals are output, and after converting this analog signal into a digital signal, the digital signal is stored. Device.
- the present invention is the wire rope flaw detector for elevators, further comprising a device for displaying a signal obtained by adding the signals output by the magnetic sensors of the plurality of abnormality detectors.
- the present invention is the elevator wire rope flaw detector, wherein the U-shaped magnetic sensor covers at least a half or more of the wire rope.
- the present invention in an elevator using a small-diameter wire rope having a nominal diameter of 4 mm to 8 mm, highly reliable flaw detection can be performed on the wire rope in a minimum space. Also, in an elevator with a structure with a large number of wire ropes, the time required for damage inspection can be significantly reduced. For this reason, downtime for maintenance can be reduced, and service time can be improved. Further, according to the flaw detection device of the present invention, especially in an elevator without a machine room, the inspector can collect signals outside the hoistway, so that safety is improved.
- FIG. 1 is a schematic perspective view showing a wire rope flaw detector for elevators according to the present invention.
- FIG. 2 is a side view of a single probe of an elevator wire rope flaw detector.
- FIG. 3A is a diagram showing a magnetic sensor.
- FIG. 3B is a diagram showing a magnetic sensor.
- FIG. 3C is a diagram showing a magnetic sensor.
- FIG. 4A is an explanatory diagram showing a signal flow of the wire rope flaw detector for elevators according to the present invention.
- FIG. 4B is an explanatory diagram showing a signal flow of the wire rope flaw detector for elevators according to the present invention.
- FIG. 5 is a schematic view showing a method for holding the magnetic flaw detector of the present invention in a hoistway.
- FIG. 6 is a schematic view showing a method for holding the magnetic flaw detector of the present invention in a hoistway.
- FIG. 7 is a diagram showing a conventional magnetic flaw detector used for an elevator.
- FIG. 8 is a conceptual diagram of magnetic flux leakage in a deteriorated rope.
- FIG. 1 to 6 show an embodiment of an elevator wire rope flaw detector according to the present invention.
- the elevator wire rope flaw detector according to the present invention is applied to an elevator which mainly uses a small-diameter wire rope to save space and energy, and has a nominal diameter of the wire rope. Is 4 mm to 8 mm.
- the elevator wire rope flaw detector includes a plurality of abnormality detecting sections (single probes) 9, each of which has a first magnetic pole having a different polarity. It has a magnetic pole 10a and a second magnetic pole 10b, and a U-shaped magnetic sensor 11 arranged between the first magnetic pole 10a and the second magnetic pole 10b.
- the first magnetic pole 10a is an N pole
- the second magnetic pole 10b is an S pole.
- the wire rope 1 is measured in a state where the wire rope 1 is fitted to the first and second magnetic poles 10 a and 10 b of the unitary probe 9 and the magnetic sensor 11. Since the wire rope 1 to be measured is under tension load during maintenance work, changing the arrangement of the wire rope 1 according to the structure of the single probe 9 is a time-consuming operation, and places an unnecessary burden on the wire rope 1. This causes difficulties such as giving. Therefore, by using the small single probe 9 according to the present invention, it is possible to contribute to realizing a space-saving rope layout in an elevator.
- the U-shaped magnetic sensor 11 covers at least half the circumference of the wire rope 1.
- the plurality of single probes 9 are arranged in two rows in the upper row 12 and three rows in the lower row 13, each being arranged in parallel. That is, the five single probes 9 are arranged stepwise (displaced) in the longitudinal direction of the wire rope 1, and the flaw detection of the five wire ropes 1 can be performed simultaneously.
- Each single probe 9 is composed of a magnet part 14 (see FIG. 2) for exciting the wire rope 1 and a magnetic sensor 11 for detecting a leakage magnetic flux.
- Figure 2 shows a side view of the single probe 9.
- reference numerals 15a and 15b denote permanent magnets having polarities in the illustrated direction.
- the magnetic poles 10a and 10b are made of a ferromagnetic material having a U-shaped groove into which the wire rope 1 to be fitted is fitted, and are adjacent to the permanent magnets 15a and 15b.
- Reference numeral 16 represents a magnetic path. It is a yoke that also has a ferromagnetic material strength to form.
- the magnet portion 14 includes permanent magnets 15a and 15b, magnetic poles 10a and 10b, and a yoke 16, and forms a magnetic path including the wire rope 1 to be measured in the direction of the arrow in the figure.
- the magnetic sensor 11 includes a coil 17 and a base 18 that also holds a non-magnetic material force for holding the coil 17 near the side surface of the rope to be measured.
- Reference numeral 19 shown in FIG. 3 is a magnetic shielding plate provided on the magnetic sensor 11 to prevent noise due to magnetic flux leaking from the adjacent wire rope 1 (the magnetic shielding plate 19 is omitted from FIG. 1 because it is complicated). I am).
- FIGS. 3 (a), (b), and (c) are shown in FIGS. 3 (a), (b), and (c).
- Fig. 3 (a) is a diagram showing a magnetic sensor
- Fig. 3 (b) is a cross-sectional view taken along the line X-X in Fig. 3 (a)
- Fig. 3 (c) is an enlarged view of section A in Fig. 3 (b). It is.
- the flaw detection of the elevator wire port 1 having a nominal diameter of 8 mm to 8 mm was performed, and the U-shaped bottom radius r force of the magnetic sensor 11 was 2 mm or more and 5 mm or less.
- the difference between the U-shaped bottom radius r and the nominal diameter 1Z2 (i.e., r) of the wire rope 1 is 1.5.
- a sliding member 20 having practically non-magnetic force is provided between the magnetic sensor 11 and the wire rope 1 to be measured. It is desirable from the viewpoint of flaw detection sensitivity to dispose the sliding member 20 between the magnetic sensor 11 having the above dimensions and the wire rope 1 to be measured.
- the elevator wire rope flaw detector of the present invention has a single probe 9 that is small and capable of highly reliable flaw detection, and corresponds to five wire ropes 1. The features and effects described do not depend on the number.
- FIG. 4 (a) shows one of the features of signal processing including signal display of the flaw detector of the present invention.
- reference numeral 21 is a probe portion composed of a plurality of single probes 9 according to the present invention.
- the signals generated by the magnetic sensor 11 of each single probe 9 are sent to the signal processing section 22 via the terminals T1 to T5 of the magnetic sensor 11.
- Each signal is amplified in the signal processing section 22 (an amplifier is not shown), and after being subjected to processing such as filtering as required, digital signals are converted by AZD conversion.
- the signals can be easily stored in the storage device (memory) 24 by digital numerical values.
- deterioration in transmission and recording after the signal processing section 22 can be reduced, and a widely used device such as a personal computer can be used as a signal display means.
- all signals from the single probe 9 are sent to one display unit 25, for example, a personal computer, and are simultaneously displayed on the screen. Since all the wire ropes 1 used in the elevator are fitted to each of the single probes 9, all the ropes can be detected by one scan, and furthermore, one screen is displayed. Since all signals are displayed, flaw detection work time is greatly reduced.
- the reason why the sum of the signals can be obtained is as follows. That is, as a feature of the deterioration of the wire rope 1 in the elevator structure, there is a tendency that the portion of the wire rope 1 that is wound by the hoisting machine when the car is stopped at a specific floor is severely damaged with respect to the entire length of the wire rope 1. Power is also. Also, by displaying the sum of the signals, it is easy to narrow down the signals to be observed and to determine a deteriorated portion. However, in such a configuration, it is conceivable that the noise included in each signal is added and the signal indicating deterioration becomes unclear. Before generating the sum of the signals as shown in Fig. 4 (b), filtering or removing signals of a level that does not affect the strength can prevent such signal ambiguity. it can.
- the signal storage device 24 is shown as being integrated with the signal display portion 25, but the storage device 24 is integrated with the signal processing portion 22, and the AZD converter 23 It may be provided immediately after.
- FIGS. 4 (a) and 4 (b) it is not necessary to connect the signal flow with the wiring shown by the arrows between the devices.
- the storage device 24 provided immediately after the AZD converter 23, Alternatively, a removable nonvolatile memory may be used. In this case, the storage device 24 can be detached from the signal processing portion 22 after the signal is collected and connected to the display portion 25. Further, since the display portion is structurally separate, a portion necessary for flaw detection work can be obtained. Can be reduced in size.
- FIGS. 5 and 6 show an example of an elevator without a machine room using a small-diameter wire rope.
- reference numeral 26 denotes a car
- reference numeral 27 denotes a counterweight
- reference numeral 28 denotes a hoisting machine fixed in the hoistway, for example, at the top of the hoistway
- reference numeral 30 denotes a small number of the present flaw detector. Both also show the probe part.
- the probe portion 30 including the plurality of single probes 9 is arranged and fixed by the fixture 30a such that the bottom of the U-shaped magnetic sensor 11 is pressed against the wire rope 1 to be measured in the direction of the arrow in FIG. . That is, the probe part 30 is fixed to the vicinity of the hoisting machine 28 such that the side surface of the wire rope 1 to be measured that contacts the groove bottom of the drive sheave of the hoisting machine 28 contacts the bottom of the U-shaped magnetic sensor 11. Fixed by 30a.
- the reason for determining the mounting direction and the installation position as described above is as follows. This is because, in general, among the damages of the wire rope 1, the damage caused by the drive sheave surely detects a part of the wire rope 1 where the wire rope 1 is deteriorated, which is wound on the hoisting machine 28.
- FIGS. 5 and 6 scanning of the wire rope 1 to be measured, that is, sampling of signals, is performed after the elevator is started up in a check operation or the like.
- Elevator wire rope according to the present invention The flaw detection device can be held in the hoistway as shown in the figure, so that the flaw detection work can be lifted and lowered. It can be carried out off-road, which contributes to the improvement of safety especially in elevators without a machine room.
- the probe part 30 may be attached to the car 26 with the fixture 30a. By attaching the probe portion 30 to the car 26, power can be supplied from the car 26, and mounting work can be performed at an arbitrary car position.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04818978A EP1676806A4 (en) | 2003-11-21 | 2004-11-19 | WIRE SENSOR DETECTOR FOR LIFT |
US10/579,796 US20070090834A1 (en) | 2003-11-21 | 2004-11-19 | Wire rope flaw detector for elevator |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003392788A JP2005154042A (ja) | 2003-11-21 | 2003-11-21 | エレベータ用ワイヤロープ探傷装置 |
JP2003-392788 | 2003-11-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005049471A1 true WO2005049471A1 (ja) | 2005-06-02 |
Family
ID=34616466
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/017256 WO2005049471A1 (ja) | 2003-11-21 | 2004-11-19 | エレベータ用ワイヤロープ探傷装置 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20070090834A1 (ja) |
EP (1) | EP1676806A4 (ja) |
JP (1) | JP2005154042A (ja) |
CN (1) | CN1882493A (ja) |
TW (1) | TWI261570B (ja) |
WO (1) | WO2005049471A1 (ja) |
Cited By (1)
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JP2022155849A (ja) * | 2021-03-31 | 2022-10-14 | フジテック株式会社 | エレベータ用ロープテスタ |
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JP5023112B2 (ja) * | 2009-07-31 | 2012-09-12 | 株式会社日立製作所 | エレベーター |
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JP2002333431A (ja) * | 2001-05-10 | 2002-11-22 | Hitachi Building Systems Co Ltd | ワイヤロープ診断測定装置 |
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DE69233065D1 (de) * | 1991-06-11 | 2003-06-26 | Newt Holdings Ltd | Sonde |
US5828213A (en) * | 1996-10-21 | 1998-10-27 | Hickman; Jack R. | Method and apparatus for magnetically sampling the uniformity of an elongate object |
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JP2002139349A (ja) * | 2000-11-06 | 2002-05-17 | Sony Corp | 位置検出装置および方法、サーボ装置およびサーボ方法並びにモータ |
US20020104715A1 (en) * | 2001-02-07 | 2002-08-08 | Vlad Zaharia | Strategic placement of an elevator inspection device based upon system and component arrangement arrangement |
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2003
- 2003-11-21 JP JP2003392788A patent/JP2005154042A/ja active Pending
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2004
- 2004-11-19 WO PCT/JP2004/017256 patent/WO2005049471A1/ja not_active Application Discontinuation
- 2004-11-19 EP EP04818978A patent/EP1676806A4/en not_active Withdrawn
- 2004-11-19 TW TW093135669A patent/TWI261570B/zh not_active IP Right Cessation
- 2004-11-19 CN CN200480033728.9A patent/CN1882493A/zh active Pending
- 2004-11-19 US US10/579,796 patent/US20070090834A1/en not_active Abandoned
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JPS56148052A (en) * | 1980-04-21 | 1981-11-17 | Hitachi Elevator Eng & Serv Co Ltd | Electromagnetic flaw detector for continuous magnetic material |
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JP2000344441A (ja) * | 1999-06-04 | 2000-12-12 | Hitachi Building Systems Co Ltd | ロープ探傷装置の保持装置 |
JP2002181792A (ja) * | 2000-12-15 | 2002-06-26 | Hitachi Building Systems Co Ltd | ワイヤーロープの損傷検出装置 |
JP2002333431A (ja) * | 2001-05-10 | 2002-11-22 | Hitachi Building Systems Co Ltd | ワイヤロープ診断測定装置 |
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JP2003221176A (ja) * | 2002-01-09 | 2003-08-05 | Kone Corp | エレベータ |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2022155849A (ja) * | 2021-03-31 | 2022-10-14 | フジテック株式会社 | エレベータ用ロープテスタ |
JP7185857B2 (ja) | 2021-03-31 | 2022-12-08 | フジテック株式会社 | エレベータ用ロープテスタ |
Also Published As
Publication number | Publication date |
---|---|
EP1676806A4 (en) | 2008-02-27 |
JP2005154042A (ja) | 2005-06-16 |
US20070090834A1 (en) | 2007-04-26 |
TWI261570B (en) | 2006-09-11 |
CN1882493A (zh) | 2006-12-20 |
EP1676806A1 (en) | 2006-07-05 |
TW200526506A (en) | 2005-08-16 |
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