SE468433B

SE468433B - Method and device for achieving constant hook spacing

Info

Publication number: SE468433B
Application number: SE8803105A
Authority: SE
Inventors: B Hellberg
Original assignee: Ffv Aerotech Ab
Priority date: 1988-09-05
Filing date: 1988-09-05
Publication date: 1993-01-18
Also published as: SE8803105L; SE8803105D0

Abstract

A method and device for achieving constant hook spacing between at least one lift mechanism hook 7 with hoisting cable 5 and at least one cable hook 3 with lift cable 2 in a lift mechanism when an angular change is imparted to the lift mechanism in relation to the cable extent, in which the hoisting cable 5 belonging to the lift mechanism hook 7 is made to unroll/roll up against a pulley wheel 6 in the shape of the sector of a circle and in which the lift cable 2 belonging to the cable hook 3 is made to roll up/unroll against a cable wheel. <IMAGE>

Description

, _ - s den till linkroken anslutna hisslinan över brytskivan. Detta åstadkom- mes genom att hissdonskroken är infäst med två linor som löper mot en cirkelsektor med samma radie som hisslinans brytskiva. , _ - s the elevator rope connected to the link hook over the break plate. This is achieved by the elevator hook being fastened with two ropes running towards a circular sector with the same radius as the breaking rope of the elevator rope.

KORT BESKRIVNING AV RITNINGEN: Uppfinningen kommer nu att närmare beskrivas genom utföringsexempel där hänvisningar till ritningsfiguren görs med hjälp av sifferhänvis- ningar.BRIEF DESCRIPTION OF THE DRAWING: The invention will now be described in more detail by means of exemplary embodiments where references to the drawing figure are made by means of numerical references.

Figuren visar uppfinningen vid två lägen av hissdonets arm.The figure shows the invention at two positions of the elevator arm.

BESKRIVNING AV UPPFINNINGEN: Ett hissdon, typ vinsch, är försett med en arm 1 med ett linhjul ro- terbart lagrad i armens yttre ände. Från hissdonets lintrumma (ej visad) löper hisslinan 2 genom armen 1 över linhjulet vidare till en linkrok 3. ' Vid hissdonets arm 1 är vidare två fastsättningsanordningar 4 anordna- de på vardera sidan om armen 1 för att sätta fast ändarna av tvâ lyft- linor 5. Lyftlinorna 5 löper över var sin brytskiva 6 vidare till en hissdonskrok 7 vid vilken lyftlinornas andra ändar är fastsatta. Varje brytskiva 6 är cirkelsektorformad och monterad vid armen l så att dess tänkta cirkelcentrum sammanfaller med linhjulets centrum. Dessutom är linhjulets radie och brytskivornas 6 tänkta radier lika. De för linor- na 5,2 anpassade spåren i brytskivan (6) och linhjulet uppvisar härvid samma tvärsnittsprofil.DESCRIPTION OF THE INVENTION: An elevator, type winch, is provided with an arm 1 with a pulley rotatably mounted in the outer end of the arm. From the rope drum of the elevator (not shown) the elevator rope 2 runs through the arm 1 over the rope wheel further to a rope hook 3. At the arm 1 of the elevator there are further two fastening devices 4 arranged on each side of the arm 1 for securing the ends of two lifting ropes. 5. The lifting ropes 5 each run over their breaking plate 6 further to an elevator hook 7 to which the other ends of the lifting ropes are attached. Each breaking disc 6 is circular sector-shaped and mounted at the arm 1 so that its imaginary center of the circle coincides with the center of the pulley. In addition, the radius of the pulley and the imaginary radii of the breaking discs 6 are equal. The grooves in the break plate (6) and adapted to the ropes 5.2 and the rope wheel have the same cross-sectional profile.

Vid normal användning av hissdonet används hissdonskroken 7 med dess anslutna linor 5 för att hänga upp hissdonet med, varvid de till hiss- donskroken anslutna lyftlinornas 5 längd väljs beroende av hissdonets önskade arbetshöjd. Linkroken 3 används således för att krokas fast i lasten.In normal use of the elevator, the elevator hook 7 with its connected ropes 5 is used to hang the elevator with, the length of the lifting ropes 5 connected to the elevator hook being selected depending on the desired working height of the elevator. The link hook 3 is thus used to be hooked to the load.

När en last hissas med hissdonet rullar hisslinan 2 över linhjulet i armen och in i hissdonet där det lindas upp på lintrumman. Hissdonet är härvid upphängt i hissdonskroken 7 vid en för operatören lämplig höjd. Upphissningen av lasten antas stanna så att avståndet mellan hissdonskroken 7 och linkroken 3 är L när armen 1 befinner sig i läge 3 A (se fig.). När armens 1 läge ändras till läge B åstaåkâmmes4eÛ'§v- rullning X av lyftlinorna 5 från brytskivorna 6. Samtidigt åstadkommes en párullning X av hisslinan 2 till linhjulet. Krokavståndet påverkas således inte eftersom LA=LA-X+X-LB.When a load is hoisted with the hoist, the hoist rope 2 rolls over the rope wheel in the arm and into the hoist where it is wound up on the rope drum. The elevator is suspended in the elevator hook 7 at a height suitable for the operator. The lifting of the load is assumed to stop so that the distance between the hoist hook 7 and the link hook 3 is L when the arm 1 is in position 3 A (see fig.). When the position of the arm 1 is changed to position B, roll-up X of the lifting ropes 5 from the breaking discs 6 is performed. The hook distance is thus not affected because LA = LA-X + X-LB.

Innom ramen för de efterföljande patentkraven kan utföringsformerna variera. Linorna kan arrangeras på annat sätt än det här visade. Kom- l binationerna en lyftlina, en hisslina och två lyftlinor, två hisslinor är tänkbar.Within the scope of the appended claims, the embodiments may vary. The ropes can be arranged in a different way than shown here. The combinations one lifting rope, one elevator rope and two lifting ropes, two elevator ropes are conceivable.

Claims

Patent claim

A method of achieving a constant hook distance with at least one hoist hook (7) with lift (5) and at least one hook (3) with hoist (2) of a hoist, when the hoist is subjected to an angular change in relation to the extension, k It is indicated that the lift (5) to the hoist hook (7) is caused to unscrew / pull against a circular sector-shaped break plate (6) at the same time as the lift (2) to the hook (3) is caused to push against the ring with an equally large ruin.

Device for achieving constant hook spacing between at least one elevator hook (7) with lift (5) and at least one hook (3) with lift (2) of an elevator, when the elevator is subjected to an angle change in relation to the extension, The lift (5) to the elevator hook (7) rubs / pâruiïar a circular sector-shaped break plate (6) at the same time as the lift (2) to the hook-in (3) with an equally large ruïining pâru11ar / avru11ar a 1inhju1 and that the row wheel and 1ï.

Device according to claim 2, characterized in that the elevator hook (7) is fastened to two elevator ropes (5) which each extend over their respective break plate (6) and are fastened with fastening devices (4) to the elevator device.

4. Device according to claim 2 or 3, characterized in that the breaking discs (6) are arranged so that the imaginary circle center of the discs coincides with the axis around the wall in which the housing is mounted in the elevator.

Device according to claim 4, characterized in that the grooves in the housing and the break plate (6) have the same cross-sectional profile.