Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
  • B66B1/00—Control systems of elevators in general
  • B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
  • B66B1/00—Control systems of elevators in general
  • B66B1/34—Details, e.g. call counting devices, data transmission from car to control system, devices giving information to the control system
  • B66B1/3476—Load weighing or car passenger counting devices
  • B66B1/3484—Load weighing or car passenger counting devices using load cells

Definitions

• the present invention relates to a load suspension device for cable lifts with an integrated load measuring device, in which the weight of the load suspension device and the payload causes the load-proportional deformation of at least one elastic element, at least one sensor detecting this deformation and representing the strength of the deformation and thus the load Generated signal to an elevator control.
• Load measuring devices for load suspension devices of lifts have the task of preventing elevator travel with an impermissibly high load and of providing the elevator control system with information that enables it to react appropriately to call commands by elevator users depending on the current load condition of the load suspension device.
• EP 0 151 949 discloses a load measuring device for an elevator elevator, which is based on the principle that the entire elevator car projects on at least four horizontally from an elevator floor frame
• Bending beams supports that these bending beams experience a load-proportional deflection.
• the deflection of each individual bending beam is recorded using strain gauges. All strain gauges together form a measuring bridge that sends a load-proportional analog signal to the. Elevator control supplies.
• the load measuring device described has some disadvantages.
• the measuring principle requires four bending girders, each equipped with one or two strain gauges, whereby the mechanical tolerances of the bending girders as well as the resistance and attachment tolerances of the strain gauges are to be limited so closely that all four
• Bending sensors with the same loads have the same resistance values. All four or eight strain gauges must be individually connected to a central evaluation circuit, which causes considerable effort. In addition, the four force introduction points between the floor of the elevator car and the bending beams must be adjusted vertically during assembly so that an acceptable force distribution is guaranteed.
• the present invention has for its object to provide a simple and inexpensive load measuring device for load suspension devices of elevators with looping rope drive, which does not have the disadvantages mentioned above.
• the load suspension device according to the invention for cable lifts with an integrated load measuring device has significant advantages.
• the total weight of the load suspension device and thus also the payload is recorded by means of a single sensor, and eccentrically arranged payloads are also correctly recorded with this. This saves costs for further sensors, for their wiring and for their more complicated signal evaluation.
• the elastic element, whose deformation caused by the weight of the load suspension device is detected by the sensor, is part of the support structure with which the rope pulleys are attached to the load handler. As a result, essentially no additional mechanical construction elements and no additional installation space for the load measuring device are required.
• the elastic element the load-dependent deformation of which is detected by a sensor, can be designed for different types of stress, i. H. it can be designed, for example, as a bending beam, as a tension / compression rod, as a torsion bar or, in order to achieve larger deformation paths, as a compression, tension or torsion spring. This allows optimally adapted load measuring devices to be designed for different designs of load suspension devices.
• Advantageous and inexpensive designs of the load suspension device according to the invention with an integrated load measuring device can be achieved by using sensor principles which are adapted to geometric conditions, environmental influences and in particular to accuracy requirements.
• the invention allows the use of a wide variety of sensors for detecting deformation, such as strain gauges, vibrating string sensors, opto-electrical distance or angle sensors and inductive or capacitive distance sensors.
• Load suspension devices or improved deformation measurement options can be the advantages.
• the support structures for the two pulleys can be designed as separate and differently designed units and no mechanical connections between these units are required. Such designs are made possible by the fact that both rope pulleys are always subjected to the same load in the inventive looping arrangement of the support ropes.
• Load suspension devices for larger loads are usually equipped with a support frame.
• load suspension devices for smaller payloads, these can be designed as a self-supporting unit.
• the support structure (s) carrying the rope pulleys and containing the elastic element are advantageously fastened directly to the floor structure of the load-carrying means.
• FIGS. 1 to 3 show schematically the installation situation for a load suspension device according to the invention without a supporting frame with a first variant of the integrated load measuring device.
• 2 shows a load suspension device according to the invention without a support frame with a second variant of the integrated load measuring device.
• FIG 3 shows a load suspension device according to the invention without a support frame with a third variant of the integrated load measuring device.
• 1 shows a load-bearing device 1 without a supporting frame according to the invention with the elevator components that are most important for its function.
• 2 designates two guide rails on which the load-carrying means is guided vertically by means of sliding or roller guide shoes 3.
• This essentially consists of a base frame 4 with base plate 5, a cabin 6 built thereon, the slide or roller guide shoes 3 mentioned, and two rope pulleys 9 fastened to the base frame 4 by means of a support structure 7 via elastic insulation elements 8.
• the support structure 7 consists of a bending beam 7.1 and two pulley supports 7.2.
• a supporting rope 10 can also be seen, which is guided vertically downward from a fixed rope point 11, then horizontally under the rope pulleys 9 of the load-carrying device 1 and then vertically upward to a traction sheave 12 of an elevator drive machine 13.
• the further course of the suspension cable 10 from the traction sheave 12 down to a deflection sheave attached to a balancing weight and from there upward to a second fixed rope point is not shown here.
• a vertical and a horizontal load-proportional rope tensile force acts on each of the two rope pulleys 9.
• the arrows 14 symbolize the on the pulleys 9 and thus on the Support structure 7 acting, resulting from the rope tensile forces of the supporting ropes rope pulley loads.
• a deflection sensor 15 for example a strain gauge sensor, which is not explained in more detail here and which generates a signal corresponding to the strength of the deflection and thus the total weight of the load-bearing means 1 as input for an elevator control.
• the load-carrying means 1 with base frame 4, base plate 5 and cabin 6, which are guided on guide rails 2 by means of a sliding or roller guide shoe 3, can be seen.
• the support structure 7 carrying the cable pulleys 9 essentially consists of a fastening support 17 attached to the base frame 4 via elastic insulation elements i and two cable pulley supports 18.
• the cable pulley support, not shown here, arranged on the right corresponds to the cable pulley supports according to FIG. 1.
• the cable pulley support 18 on the left is articulated by means of a bending element 19 on the mounting bracket 17 and supported by a pressure sensor 16 relative to the latter.
• the articulated attachment of the pulley support 18 could also be achieved with an articulated axis.
• the cable pulley load 14 resulting from the cable tensile forces of the supporting cables causes a load-proportional compressive force on the pressure sensor 16, which also forms the elastic element, and which generates a signal corresponding to the total weight of the load-carrying device 1 as input for an elevator control.
• the pressure sensor can be designed, for example, as a piezoelectric element, as a capacitive sensor or as a strain gauge element.
• 3 shows a third variant of the load suspension device according to the invention with an integrated load measuring device.
• the rope pulley support, not shown here, arranged on the right corresponds to the rope pulley supports according to FIG.
• a stop 23 prevents overloading of the torsion bar 22. The latter is extended beyond the bearing support 20 towards the rear (into the plane of the drawing) and is connected at its rear end to the fastening bracket 17 in a rotationally fixed manner.
• Rope pull forces of the supporting ropes result in rope pulley load 14, via the rope pulley support 21 designed as a pivot lever, causing a load-proportional torque which rotates the torsion bar 22 and causes corresponding load-proportional torsional stresses in the latter.
• the torsion bar In its exposed area, i.e. H.
• the torsion bar is equipped on its surface with a torsion voltage sensor in the form of strain gauges, with the aid of which the torsion voltages and thus the torque are recorded and a signal corresponding to the total weight of the load suspension device 1 as input for a Elevator control can be generated.
• a torsion voltage sensor in the form of strain gauges, with the aid of which the torsion voltages and thus the torque are recorded and a signal corresponding to the total weight of the load suspension device 1 as input for a Elevator control can be generated.
• commercially available torque measuring devices based on other measuring principles can also be used as the torque sensor.

Landscapes

• Engineering & Computer Science (AREA)
• Automation & Control Theory (AREA)
• Mechanical Engineering (AREA)
• Computer Networks & Wireless Communication (AREA)
• Maintenance And Inspection Apparatuses For Elevators (AREA)
• Elevator Control (AREA)
• Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
• Cage And Drive Apparatuses For Elevators (AREA)
• Force Measurement Appropriate To Specific Purposes (AREA)
• Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
• Forklifts And Lifting Vehicles (AREA)
• Grinding Of Cylindrical And Plane Surfaces (AREA)

Priority Applications (11)

Applications Claiming Priority (2)

Related Child Applications (1)

Publications (1)

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ID=8174674

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Cited By (8)

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Citations (2)

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• 2001
  • 2001-04-26 CA CA2406896A patent/CA2406896C/en not_active Expired - Lifetime
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  • 2001-04-26 HK HK03104981.0A patent/HK1055590B/zh not_active IP Right Cessation
  • 2001-04-26 MX MXPA02010660A patent/MXPA02010660A/es active IP Right Grant
  • 2001-04-26 ES ES01921103T patent/ES2401773T3/es not_active Expired - Lifetime
  • 2001-04-26 SK SK1476-2002A patent/SK286344B6/sk not_active IP Right Cessation
  • 2001-04-26 AU AU48217/01A patent/AU784531B2/en not_active Ceased
  • 2001-04-26 PL PL358217A patent/PL205025B1/pl unknown
  • 2001-04-26 JP JP2001580789A patent/JP5044079B2/ja not_active Expired - Fee Related
  • 2001-04-26 KR KR1020027014675A patent/KR20030003269A/ko not_active Ceased
  • 2001-04-26 EP EP01921103A patent/EP1278694B1/de not_active Expired - Lifetime
  • 2001-04-26 CZ CZ20023840A patent/CZ298166B6/cs not_active IP Right Cessation
  • 2001-04-26 WO PCT/CH2001/000265 patent/WO2001083350A1/de not_active Ceased
  • 2001-04-26 BR BRPI0110436-5A patent/BR0110436B1/pt not_active IP Right Cessation
  • 2001-04-26 HU HU0300349A patent/HU226605B1/hu not_active IP Right Cessation
  • 2001-04-26 CN CNB018089119A patent/CN1218864C/zh not_active Expired - Fee Related
• 2002
  • 2002-10-28 ZA ZA200208701A patent/ZA200208701B/en unknown
  • 2002-10-30 US US10/283,782 patent/US6715587B2/en not_active Expired - Lifetime
  • 2002-11-01 NO NO20025257A patent/NO322985B1/no unknown

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