EP2688831A1 - Winde mit gutem griff zum handhaben von lasten - Google Patents

Winde mit gutem griff zum handhaben von lasten

Info

Publication number
EP2688831A1
EP2688831A1 EP12702579.9A EP12702579A EP2688831A1 EP 2688831 A1 EP2688831 A1 EP 2688831A1 EP 12702579 A EP12702579 A EP 12702579A EP 2688831 A1 EP2688831 A1 EP 2688831A1
Authority
EP
European Patent Office
Prior art keywords
wheel
pulley
axis
winch
groove
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP12702579.9A
Other languages
English (en)
French (fr)
Other versions
EP2688831B1 (de
Inventor
Myrtil OUVRARD
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fixator
Original Assignee
Fixator
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fixator filed Critical Fixator
Publication of EP2688831A1 publication Critical patent/EP2688831A1/de
Application granted granted Critical
Publication of EP2688831B1 publication Critical patent/EP2688831B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/54—Safety gear
    • B66D1/58—Safety gear responsive to excess of load
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/60—Rope, cable, or chain winding mechanisms; Capstans adapted for special purposes
    • B66D1/74—Capstans
    • B66D1/7415—Friction drives, e.g. pulleys, having a cable winding angle of less than 360 degrees
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • B66D3/18—Power-operated hoists

Definitions

  • the present invention relates to an adhesion winch for handling loads.
  • a winch comprising at least one frame, a pulley mounted on said frame, said pulley comprising an axis and a wheel threaded on said axis, said wheel, said grooved wheel, being provided with an external peripheral groove for receiving a cable, means for rotating said wheel and holding means by support, able to exert a bearing force towards the bottom of the groove of the wheel, for support by support cable inside the groove of the wheel.
  • the adhesion winches have the characteristic of being able to be used with a cable of great length because of the principle of retention by adhesion of the cable inside a groove a ique of the pulley, the width of the throat corresponding substantially to the diameter of the cable to be received in the groove, so that the cable has only one winding turn around said pulley.
  • Such adhesion winches are more particularly used for access to the facades of buildings, access to work areas in elevator shafts, wells, silo strict. They have the following advantages over other winches:
  • the winch can accompany the load.
  • the winch with adhesion presents, in its zone of fixing to the material to equip, at least one force sensor.
  • This force sensor may be for example in the form of a spring disposed in the winch attachment zone equipment to equip.
  • the measuring means to avoid an overload are dedicated to the winch equipped
  • the measuring means to prevent overloading impose a predetermined fixing of the winch on the equipment to be equipped
  • the measuring means to avoid overload are generally very sensitive, and are, therefore, difficult to adjust and lack precision.
  • An object of the present invention is therefore to provide an adhesion winch of the aforementioned type, the design of the means for detecting an overload makes it possible to dispense with a particular attachment of the winch equipment to equip.
  • Another object of the present invention is to provide an adhesion winch whose design means for detecting an overload allows a reliable and reproducible measurement.
  • Another object of the present invention is to provide an adhesion winch whose design makes it possible to limit the wear of said overload detection means in time.
  • the subject of the invention is an adhesion winch for handling loads, said winch comprising at least one frame, a pulley mounted on said frame, said pulley comprising an axle and a wheel threaded onto said axle, said wheel.
  • said grooved wheel being provided with an external peripheral groove for receiving a cable, means for driving in rotation of said wheel and means for holding by support, able to exert a bearing force in the direction the bottom of the groove of the wheel, for a support by supporting the cable inside the groove of the wheel, characterized in that the axis, called a torque axis, about which the pulley wheel is rotatably mounted, is equipped with means for measuring at least one magnitude representative of the at least radial forces or loads exerted on said axis and in that that the winch comprises a monitoring unit able to communicate with said measuring means, said monitoring unit being equipped with means for processing said at least one quantity measured by said measuring means and means for transmitting a signal of alerting and / or controlling means for rotating the pulley wheel according to said at least one measured quantity.
  • the integration of the measuring means of at least one representative magnitude of the at least radial forces or loads exerted on said axis, inside the axis able to deform, in particular to bend, under the action of the weight load, allows to have reliable measuring means, compact and independent of the method of attachment of the winch equipment to equip.
  • the drive means for rotating the wheel of the pulley comprise at least one motor, preferably a geared motor, a driving member adapted to be driven in displacement by said motor, and a driven member disposed on the wheel of the pulley and engaged with said driving member, and, the driving member means for driving the pulley wheel in rotation and the means for holding by support for holding the cable inside the groove of the wheel of the pulley are arranged diametrically opposite around said wheel of the pulley.
  • the member driving means for driving the wheel of the pulley comprises at least one rotary pinion and the driven member of the means for driving the pulley wheel in rotation is a set circumferential toothing, preferably at the top of one of the flanks of the groove of the pulley wheel.
  • the support holding means for holding the cable inside the groove of the wheel of the pulley comprise at least one lifter equipped with two bearings inserted at least partially inside the groove of the wheel and mounted to rotation about an axis parallel to the axis of rotation of the wheel of the pulley, said spreader being equipped with a pivoting lever loaded by spring tending to bias said bearings bearing against the bottom of the groove.
  • the rudder with its two bearings is therefore positioned on a diametral lle of the wheel of the pulley passing through the axis of the wheel and the driving member means for driving the wheel in rotation.
  • the axis, around which the wheel of the pulley is mounted to rotate is an axis mounted on the frame, fixed at one of its ends, and free at its other end. The axis can thus flex under the action of the load.
  • the monitoring unit comprises input means of a threshold value, called overload
  • said processing means of said at least one measured quantity comprise means for comparing said at least one quantity measured by said measuring means with said overload threshold value
  • said means for transmitting an alert signal and / or for controlling the means for rotating the wheel are configured to emit an alert signal and / or stop in operation of the means for driving the wheel in the direction of a rise of the load, when the value of said at least one measured quantity is greater than at the predetermined overload threshold value.
  • threshold values can be defined to perform other actions: stop when laying the load on the ground (lack of load on the axis), stop when locking inside the winch (sudden change in the stress on the axis) ...
  • the axis, around which the pulley wheel is rotatably mounted is provided with an axial bore inside which are housed the measuring means of at least one representative of the magnitude of the forces or loads at least radial exerted on the axis.
  • FIG. 1 represents a partial view in section of a tril according to the invention, the monitoring unit and the motor having been omitted;
  • Figure 2 shows a side view of a winch according to the invention
  • FIG. 3 represents a front view of a winch according to the invention, part of the frame having been omitted, and
  • Figure 4 shows a perspective view of the axis about which the wheel of the pulley is rotatably mounted.
  • the winch 1, object of the invention is an adhesion winch for handling loads. These loads can be varied and varied and include a platform for the elevation of people.
  • This winch 1 comprises at least one frame 2, and a pulley 3 mounted on said frame 2.
  • Said pulley 3 comprises an axis 4 and a wheel 5 threaded onto said axis 4.
  • This wheel 5 is provided with a circular external peripheral groove 6 for receiving a cable 20.
  • This groove 6 comprises a bottom and two flanges.
  • the winch 1 further comprises means 7 for rotating said wheel 5 about the axis 4 and means 15 for holding by support, able to exert a bearing force towards the bottom of the groove 6 of the wheel 5, for a support by supporting the cable inside the groove 6 of the wheel 5.
  • the cable 20 is equipped at one of its ends, generally with hooking means to the load. It can also be fixed at one of its ends, in a fixed manner in elevation, and be coupled, via the frame 2 of the winch 1, to an element to be driven uphill and downhill, such as a platform .
  • the axis 4 called the dynamometric axis, around which the pulley wheel 3 is rotatably mounted, is equipped with means 1 1 for measuring at least one magnitude representative of the forces or loads at the less radial exerted on said axis 4, and the winch 1 comprises a monitoring unit 1 2, able to communicate with said measuring means 1 1, said monitoring unit being equipped with means 13 for processing said at least one quantity measured by said measuring means 11 and means 14 for transmitting an alert signal and / or for controlling the means 7 for rotating the wheel 5 of the pulley 3 according to said at least one measured quantity .
  • the means 7 for rotating the wheel 5 of the pulley 3 comprise at least one motor 10, a driving member 8 adapted to be rotated by said motor, and a driven member 9 disposed on the wheel 5 of the pulley 3, and engaged with said member 8 leading.
  • the member 8 driving means 7 for driving in rotation of the wheel 5 of the pulley and the support holding means 15 for holding the cable 20 inside the groove 6 of the wheel 5 of the pulley 3 are positioned diagonally opposite each other around said wheel 5 of the pulley 3.
  • the driving member 8 is a rotational pinion centrally recessed to be threaded onto the motor shaft of the geared motor 10 and is rotated by the latter.
  • the axis of rotation of the pinion is parallel to the axis of rotation of the axis 4 of the wheel.
  • This pinion meshes with a circumferential toothing disposed at the top of one of the flanks of the groove 6 of the wheel 5 of the pulley 3, and forming the member 9 led means 7 for driving in rotation the wheel 5 of the pulley 3.
  • the support holding means 15, for holding the cable 20 inside the groove 6 of the wheel 5 of the pulley 3, comprise at least one spreader 16 equipped with two bearings 17 inserted at least partially inside the groove 6 of the wheel 5 and mounted to rotate about an axis parallel to the axis of rotation of the wheel 5 of the pulley 3.
  • Said spreader 16 is equipped with a pivoting lever 18 loaded by spring 19 tending to urge said bearings 17 against the bottom of the groove 6.
  • the gear / gear meshing zone is thus arranged around the wheel 5 of the pulley 3 in a diametrically opposite manner with respect to the assembly formed by the rudder 16 and the bearings 17.
  • the spring 19 of the lever 18 which tends to act on the lever 18 in the direction of bearing of the bearings 17 against the bottom of the groove extends between the lever 1 8 and frame 2.
  • This spring 19 is formed of a plurality of spring washers, also called Belleville washers.
  • the frame 2 here is formed of two flanges which are disposed on either side of the wheel 5 of the pulley 3, in particular the faces of the wheel 5, each flange being hollowed out centrally to allow said flanges to be threaded onto axis 4 of the wheel 5 of the pulley 3.
  • the axis 4, around which the wheel 5 of the pulley 3 is rotatably mounted is an axis 4 mounted on the frame 2, fixed at one of its ends, and free at its other end, to facilitate a deformation of said axis 4.
  • One of the ends of the axis 4 is thus introduced into a recess of the flange and pinned or keyed inside said recess so as to be mounted fixed in translation and in rotation on said frame, while the other end of the axis 4 is simply introduced into a recess of the flange and mounted freely in rotation and in translation inside said recess to allow deformation, in particular a deflection under load of said axis when it undergoes a radial force via the wheel of the pulley 3.
  • This shaft 4 is further equipped on the outside with ball bearings interposed between axle and wheel hub to allow free rotation of the wheel 5 on said axle 4.
  • the axis 4, around which the pulley wheel 5 is rotatably mounted. is provided with an axial bore inside which are housed the means 1 1 for measuring at least one magnitude representative of the at least radial forces or loads exerted on the axis.
  • the means 1 1 for measuring at least one magnitude representative of the at least radial forces or loads exerted on the axis comprise at least one strain gauge or deformation gauge.
  • These measuring means 1 1 further comprise means for acquiring the voltage across the gauge, said voltage being proportional to the force acting on the axis.
  • these measuring means may comprise four resistors including a strain gauge, arranged for form a Wheatstone bridge. The bridge is powered by an electric current. When a force is applied, the electrical resistance of a strain gauge is modified by the deformation. This resistance is measured by the balancing of the bridge and one can thus determine the force undergone by said axis.
  • the value of said at least one magnitude representative of the at least radial forces or loads exerted on said axis, measured by said measuring means, is transmitted to the monitoring unit 12.
  • the axis 4 is equipped at its end with a connector to the monitoring unit 12.
  • This surveillance unit 12 is housed in a housing which also encloses the motor 10 of means 7 for driving the wheel in rotation, this housing abutting the flanges of the frame 2 described above as illustrated in FIG. 2.
  • This monitoring unit 12 is equipped with means 1 3 for processing said at least one quantity measured by said measuring means 11, and means 14 for transmitting an alert signal and / or command means 7. driving in rotation of the wheel 5 of the pulley 4 according to said at least one measured quantity.
  • the monitoring unit 12 comprises input means of a threshold value, called overload. These input means are formed, for example, by a display equipping said housing. The operator selects using the display the desired overload threshold value.
  • the means 13 for processing at least one measured variable such as a microprocessor, comprise means for comparing said at least one quantity measured by said measuring means 1 1 with the overload value.
  • the means 14 for transmitting an alert signal and / or for controlling the means 7 driving in rotation of the wheel 5 are configured to emit an alert signal and / or stop in operation means 7 for rotating the wheel 5 in the direction of a rise of the load, when the value of said at least one measured variable is greater than the predetermined overload threshold value.
  • These means 14 for transmitting an alert signal may be formed by a flashing of the display or by an alarm device emitting an audible or visual signal.
  • the monitoring unit 12 comprises input means of a threshold value, said load setting.
  • Said means 13 for processing at least one of the steps of the first alarm clock 2 comprising means for comparing said at least one quantity measured by said measuring means with said value. threshold for laying the load.
  • the average means 1 em ission of an alert signal and / or control means 7 for driving in rotation of the wheel, the unit 12 monitoring, are configured to emit an alert signal and / or stopping in operation the means 7 for driving the wheel in the direction of a descent of the load when the value of said at least one measured quantity is less than the predetermined threshold value for laying the charge.
  • the display can therefore also allow entry by an operator of a threshold value of the load and can flash in case of an alert.
  • the operation of such an adhesion winch is similar to a conventional grip winch with respect to the raising and lowering of the load by means of the cable 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pulleys (AREA)
EP12702579.9A 2011-03-23 2012-01-03 Reibungswinde zur handhabung von lasten Active EP2688831B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1152422A FR2973021B1 (fr) 2011-03-23 2011-03-23 Treuil a adherence pour la manutention de charges
PCT/FR2012/050009 WO2012127137A1 (fr) 2011-03-23 2012-01-03 Treuil a adherence pour la manutention de charges

Publications (2)

Publication Number Publication Date
EP2688831A1 true EP2688831A1 (de) 2014-01-29
EP2688831B1 EP2688831B1 (de) 2014-11-12

Family

ID=45563428

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12702579.9A Active EP2688831B1 (de) 2011-03-23 2012-01-03 Reibungswinde zur handhabung von lasten

Country Status (4)

Country Link
US (1) US9284171B2 (de)
EP (1) EP2688831B1 (de)
FR (1) FR2973021B1 (de)
WO (1) WO2012127137A1 (de)

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AU2016201502A1 (en) * 2015-12-23 2017-07-13 Gi Therapies Pty Ltd Methods of treatment of gastro-motility dysfunction
US11528897B1 (en) * 2019-06-19 2022-12-20 BlueBite Tension measuring system that determine tension on a fishing line
IT202100003911A1 (it) * 2021-02-19 2021-05-19 Mpn S R L Argano a fune passante elettromeccanico

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Also Published As

Publication number Publication date
US9284171B2 (en) 2016-03-15
FR2973021A1 (fr) 2012-09-28
FR2973021B1 (fr) 2013-04-05
EP2688831B1 (de) 2014-11-12
US20140014887A1 (en) 2014-01-16
WO2012127137A1 (fr) 2012-09-27

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