Classifications

• • D—TEXTILES; PAPER
  • D07—ROPES; CABLES OTHER THAN ELECTRIC
  • D07B—ROPES OR CABLES IN GENERAL
  • D07B1/00—Constructional features of ropes or cables
  • D07B1/14—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable
  • D07B1/145—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable comprising elements for indicating or detecting the rope or cable status
• • 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
  • B66B5/0006—Monitoring devices or performance analysers
  • B66B5/0037—Performance analysers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
  • B66B7/00—Other common features of elevators
  • B66B7/06—Arrangements of ropes or cables
  • B66B7/10—Arrangements of ropes or cables for equalising rope or cable tension
• • 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
  • B66B7/1223—Checking means specially adapted for ropes or cables by analysing electric variables
• • D—TEXTILES; PAPER
  • D07—ROPES; CABLES OTHER THAN ELECTRIC
  • D07B—ROPES OR CABLES IN GENERAL
  • D07B2301/00—Controls
  • D07B2301/25—System input signals, e.g. set points
  • D07B2301/259—Strain or elongation
• • D—TEXTILES; PAPER
  • D07—ROPES; CABLES OTHER THAN ELECTRIC
  • D07B—ROPES OR CABLES IN GENERAL
  • D07B2301/00—Controls
  • D07B2301/55—Sensors
  • D07B2301/5531—Sensors using electric means or elements
  • D07B2301/554—Sensors using electric means or elements for measuring variable resistance

Definitions

• the present invention relates to a main rope elongation detection device provided at an elepetator in which a car is suspended in a hoistway by a main rope made of a synthetic fiber rope, and detects main rope elongation.
• a car and a counterweight are suspended in a hoistway by a main rope.
• a car buffer and a counterweight buffer are installed at the bottom of the hoistway.
• the distance between the counterweight and the counterweight buffer when the car stops on the top floor is always maintained at the specified value.
• the spacing between the counterweight and the counterweight buffer is reduced due to the aging of the main rope.
• the amount of elongation of the main rope is about twice that of a steel rope.
• the distance between the counterweight and the counterweight buffer is measured during periodic inspections for such main rope elongation. At this time, one maintenance person is operating the elevator and another maintenance person is entering the hoistway bit and measuring. Therefore,
• Japanese Patent Application Laid-Open No. 6-56372 discloses a method in which measurement is performed by one maintenance person. However, with this method, the maintenance staff had to move the car to the top floor and then move to the pit to check the measurement results, which required a lot of work and reduced work efficiency. Disclosure of the invention
• the present invention has been made to solve the above-mentioned problems, and has been made in consideration of the above circumstances.
• An object is to obtain a cable elongation detecting device.
• the main rope elongation detecting device is an elevator in which a car is suspended in a hoistway by a main rope made of a synthetic fiber rope having a synthetic fiber strand and a conductive filament. It is provided to detect the elongation of the main rope, and to determine whether the measured value of the electric resistance measuring device for measuring the electric resistance value of the conductive filament is within a predetermined normal range. And a warning means for issuing a warning when the measured value is determined to be abnormal by the determination means.
• FIG. 1 is a block diagram showing a main rope elongation detection device for an elevator according to Embodiment 1 of the present invention.
• FIG. 2 is a configuration diagram showing a main part of a main rope elongation detection device for an elevator according to a second embodiment of the present invention.
• FIG. 3 is a configuration diagram showing a main part of a main rope elongation detection device at night in accordance with Embodiment 3 of the present invention.
• FIG. 4 is a configuration diagram showing a main part of a main rope elongation detecting device for an electric elevator in accordance with a fourth embodiment of the present invention.
• FIG. 5 is a block diagram showing a main rope elongation detecting device for an elevator according to a fifth embodiment of the present invention.
• FIG. 1 is a configuration diagram showing a main rope elongation detection device for an elevator according to Embodiment 1 of the present invention.
• a car 1 and a counterweight 2 are suspended in a hoistway by a main rope 3 made of synthetic fiber rope.
• the main rope 3 includes a plurality of synthetic fiber strands and a plurality of force-bonding filaments as conductive filaments embedded in at least some of the strands of the synthetic fiber strands over the entire length thereof. Has lament.
• An intermediate portion of the main rope 3 is wound around a drive sheave 5 of a drive device 4 arranged above the hoistway.
• the car 1 and the counterweight 2 are raised and lowered by the driving force of the driving device 4.
• a pair of car suspension wheels 6 around which the main rope 3 is wound are provided at the lower part of the car 1.
• a counterweight suspension wheel 7 around which the main rope 3 is wound is provided at the lower part of the car 1.
• Both ends of the main rope 3 are connected at the top of the hoistway, respectively, to ties 8,9.
• the control panel 10 for controlling the operation of the elevator is provided with an electric resistance measuring device 11 for measuring the electric resistance value of the power filament incorporated in the main cable 3.
• the electric resistance measuring devices 11 are connected to both ends of the filament.
• the control panel 10 has a judging means 12 for judging whether the measured value by the electric resistance measuring device 11 is within a predetermined normal range, and a judging means 12 for judging that the measured value is abnormal.
• an alarm means 13 for issuing an alarm when the alarm is issued.
• the main rope elongation detecting device according to the first embodiment includes an electric resistance measuring device 11, a judging unit 12, and a warning unit 13.
• the electric resistance value of the power filament of the main rope 3 is measured by the electric resistance measuring device 11 when necessary.
• the carbon filaments are arranged along the entire length of the main rope 3, and when the main rope 3 temporarily elongates, they are elongated in the same manner as the main rope 3. That is, when the main rope 3 is elongated, the entire length of the carbon filament is elongated, the cross-sectional area is reduced, and the electric resistance value is increased.
• the value measured by the electric resistance measuring device 11 is monitored by the judging means 12 to judge whether there is any abnormality. If the measured value exceeds the preset normal range, an abnormality detection signal is sent to the alarm means 13 and an alarm is issued by the alarm means 13. Necessary measures such as adjusting the run-by and replacing the main rope 3 are performed by the maintenance personnel who have been alerted.
• FIG. 2 is a configuration diagram showing a main part of a main rope elongation detection device for an elevator in accordance with a second embodiment of the present invention.
• a main rope 3 made of a synthetic fiber rope is composed of a plurality of synthetic fiber strands 31 made of, for example, aramide resin, and at least a part of the strands of the synthetic fiber strands 31 and extending over the entire length thereof.
• the electric resistance measuring device 11 having a plurality of carbon filaments 32 as conductive filaments embedded therein is connected to only one end of the main cable 3.
• two synthetic fiber strands 31 are bundled together by end connectors 33.
• the end filaments 33 are used to electrically connect the filaments 32 electrically in series in pairs.
• the electric resistance measuring device 11 is provided with a plurality of sets of a power supply 35 for applying a voltage to the carbon filament 32 via a resistor 34, a low-pass filter 36 and an A / D converter 37.
• Other configurations are the same as those of the first embodiment.
• the electric resistance measuring device 11 is provided at one end of the main rope 3. Only to be connected, wiring is easy. For this reason, for example, in a one-by-one elevating elevator, the electric resistance measuring device 11 may be connected only to the car side end or the counterweight side end of the main rope 3. Can be simplified. Embodiment 3.
• FIG. 3 is a configuration diagram showing a main part of a main rope elongation detection device for an elevator according to a third embodiment of the present invention.
• 1 electrically total c force one carbon filaments 3 2 connected in series all forces one carbon filaments 3 2 included in the main rope 3 is a plurality of end connector 3 3 of the present is The even number (six in the figure) is provided, and the electric resistance measuring device 11 is connected to only one end of the main cable 3.
• Other configurations are the same as those of the first embodiment.
• the electric resistance measuring device 11 need only be connected to one end of the main rope 3, and wiring is easy. For this reason, for example, 1: 1 roving In the elevator, the electric resistance measuring device 11 may be connected only to the car-side end or the counterweight-side end of the main rope 3, so that the device configuration can be simplified. In addition, since all the carbon filaments 32 of one main rope 3 are electrically connected in series, it is not necessary to measure the electric resistance value of each of the carbon filaments 3 2. The configuration of the measuring device 11 can be simplified. Embodiment 4.
• the power filaments 32 in one main cable 3 are electrically connected in series.However, for example, as shown in FIG. 4, a plurality of main cables 3 are used. However, the force filaments 32 may be electrically connected in series over the plurality of main ropes 3, and the configuration of the electric resistance measuring device 11 can be further simplified.
• Embodiment 5
• FIG. 5 is a block diagram showing a main rope elongation detection device for an elevator according to a fifth embodiment of the present invention.
• signals from an electric resistance measuring device 11, a temperature detecting device 21 and a humidity detecting device 22 are inputted to a CPU 14 of a judging means 12 via input circuits 15 and 16. .
• the temperature detecting device 21 detects the temperature in the hoistway and outputs the information to the judging means 12.
• the humidity detecting device 22 detects the humidity in the hoistway and outputs the information to the determining means 12.
• the determination means 12 is provided with a memory 17 which stores data such as set values to be compared with measured values and correction coefficients for temperature and humidity. If the measured value is determined to be abnormal by the CPU 14, an abnormality detection signal is output to the alarm means 13 via the output circuit 18.
• the initial electric resistance value may be stored in the memory 17 and the abnormality of the elongation amount may be determined by comparing the initial electric resistance value with the measured value. Eliminate the effect of the initial variation of the Bon Filament 3 2 to increase the detection accuracy Can be improved.
• the measured value of the electric resistance value may be stored in the memory 17 and the abnormality of the elongation amount may be determined from the average value of the measured values of a plurality of times. Can be improved.
• the electric resistance of a plurality of carbon filaments 32 was measured for one main rope 3, but by measuring the electric resistance of at least one or more carbon filaments 32, The extension of the main rope 3 can be detected.
• the reliability can be improved by measuring the electric resistance value of the plurality of carbon filaments 32.
• the carbon filament 32 is shown as the conductive filament, but a filament made of another conductive material may be used.
• the main rope elongation detection device is provided in the control panel 10.
• the main rope elongation detection device is disposed on the car 1 and the counterweight 2, and transmits an abnormality detection signal to the control panel 10. It may be sent to.
• the electrical resistance measuring device and the determination means may determine the electrical resistance value as a numerical value and directly determine the electrical resistance value, but measure the voltage when a predetermined current is applied, and determine that the voltage value is within the normal range. By judging whether or not there is, the electric resistance value may be indirectly determined.

Landscapes

• Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
• Maintenance And Inspection Apparatuses For Elevators (AREA)

Priority Applications (4)

Applications Claiming Priority (1)

Publications (1)

Family

ID=11736772

Family Applications (1)

Country Status (4)

Cited By (15)

Families Citing this family (27)

Citations (3)

Family Cites Families (2)

• 2000
  • 2000-12-07 JP JP2002547827A patent/JPWO2002046082A1/ja not_active Withdrawn
  • 2000-12-07 WO PCT/JP2000/008673 patent/WO2002046082A1/ja not_active Application Discontinuation
  • 2000-12-07 EP EP00979984A patent/EP1357073A4/de not_active Withdrawn
  • 2000-12-07 CN CNB008187940A patent/CN1243658C/zh not_active Expired - Fee Related

Patent Citations (3)

Non-Patent Citations (1)

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