BE342332A - - Google Patents

Info

Publication number
BE342332A
BE342332A BE342332DA BE342332A BE 342332 A BE342332 A BE 342332A BE 342332D A BE342332D A BE 342332DA BE 342332 A BE342332 A BE 342332A
Authority
BE
Belgium
Prior art keywords
pulley
load
horizontal plane
point
remains
Prior art date
Application number
Other languages
French (fr)
Publication of BE342332A publication Critical patent/BE342332A/fr

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/06Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs mounted for jibbing or luffing movements
    • B66C23/08Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs mounted for jibbing or luffing movements and adapted to move the loads in predetermined paths
    • B66C23/10Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs mounted for jibbing or luffing movements and adapted to move the loads in predetermined paths the paths being substantially horizontal; Level-luffing jib-cranes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C2700/00Cranes
    • B66C2700/03Cranes with arms or jibs; Multiple cranes
    • B66C2700/0307Cranes in which it is essential that the load is moving horizontally during the luffing movement of the arm or jib

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)

Description

       

   <Desc/Clms Page number 1> 
 



  Grue   p@votante   à relèvement de la flèche sous charge. 



   Les grues-pivotantes à relèvement de la flèche sous charge remportent de plus en plus sur les grues normales actuellement en usage dans les porte. 



   On a déjà proposé de nombreux moyens pour ob- tenir que la charge   d'une   grue reste dans un plan hori- zontal pendant le relèvement de la flécher 
La présente invention a pour objet la disposi- tion à hauteur convenable, sur une charpente, prévue à cet effet, d'une poulie de renvoi sur laquelle passe un câ- ble de levage, la position de la dite poulie étant   ohoi   sie de telle façon que ,sans que la longueur du câble   au**   delà de la poulie augmente, la charge reste dans un plan horizontal pendant le mouvement de relèvement de la flèche 

 <Desc/Clms Page number 2> 

 
Dans les dispositions connues, cette poulie étant   généra.'   lement placée sur le toit de la grue, ou   à   proximité de se toit, et l'effet recherché ne pouvait être obtenu. 



   On voit sur la fig. 1 la flèche de la grue   dési-   gnée, par la lettre de référence 1, portant., en bout, la poulie de renvoi 5 sur laquelle passe le   sable   de levage, 
Le câble de levage qui s'enroule autour du tam- bour 4, passe,   conformément     à   la présente invention, sur la poulie intermédiaire 3 prévus sur la charpente 2. La portion du câble située depuis la poulie 3 jusqu'à la charge   res   tant sensiblement constante, lorsque la flèche 1 se soulève, peur venir en   50 dans   la position indiquée en traits   pont-   tués, la charge reste sensiblement dans un plan horizontal. 

**ATTENTION** fin du champ DESC peut contenir debut de CLMS **.



   <Desc / Clms Page number 1>
 



  P @ voting crane with lifting of the boom under load.



   Loaded boom lift slewing cranes are increasingly popular over the normal door cranes currently in use.



   Numerous means have already been proposed for ensuring that the load of a crane remains in a horizontal plane during the raising of the jib.
The present invention relates to the arrangement at a suitable height, on a frame provided for this purpose, of a return pulley over which a lifting cable passes, the position of said pulley being such. so that, without increasing the length of the cable ** beyond the pulley, the load remains in a horizontal plane during the raising movement of the boom

 <Desc / Clms Page number 2>

 
In the known arrangements, this pulley being general. ' If placed on or near the roof of the crane, the desired effect could not be achieved.



   We see in fig. 1 the jib of the crane designated by the reference letter 1, carrying., At the end, the return pulley 5 over which the lifting sand passes,
The hoisting cable which winds around the drum 4 passes, in accordance with the present invention, over the intermediate pulley 3 provided on the frame 2. The portion of the cable located from the pulley 3 to the load remains substantially constant, when the boom 1 rises, fear to come at 50 in the position indicated in dashed lines, the load remains substantially in a horizontal plane.

** ATTENTION ** end of DESC field can contain start of CLMS **.


    

Claims (1)

Théoriquement, pour résoudre le problème* le point 3 étant supposé fixe, ainsi que le plan horizontal dans lequel doit se déplacer la charge, le lieu géométrie que que devrait décrire la poulie 5 serait une parabole ayant la poulie 3 pour foyer. Comme la flèche 1 pivote autour d'un point, elle décrit un cercle, mais le point 3 est choisi de telle sorte que la parabole soit placée de façon que le cercle lui soit oscillateur, en sorte que l'on peut supposer que la charge reste sensiblement dans un plan horizontal, EMI2.1 REVE'NDICATION la. Theoretically, to solve the problem * point 3 being assumed to be fixed, as well as the horizontal plane in which the load must move, the geometry location that pulley 5 should describe would be a parabola with pulley 3 for focus. As arrow 1 rotates around a point, it describes a circle, but point 3 is chosen so that the parabola is placed so that the circle is oscillating to it, so that we can assume that the load remains substantially in a horizontal plane, EMI2.1 REVE'NDICATION la. Gee à flèche relevable sons charge, dent le or net, pendant le re le Yage, reste dans un plan horizon tal, saraatérieée en ce qux nne poulie intermédiaire est prévue sur une eharpente rapportée sur la grue., en on fi / poiat tel que, par suite de sa position,, le crocheta pene, ...!IA./YYlh . dsat le mouvement du relevage de la flèche, reste dans .... ua plan her1soatall sans que varie c$11tlement la lon Sueur du sable compris entre, la poulie, en 'question et la ll", /.!}f/.lzJ,¯../&1- charge. /""' if:fii.', -, - " ' . -4 ohare* T= ^ ¯ c.....lWwDw-f- -<<Kr **ATTENTION** fin du champ CLMS peut contenir debut de DESC **. Gee with luffing jib its load, tooth the net gold, during the re le Yage, remains in a horizontal plane, saraatérieé in that an intermediate pulley is provided on a frame attached to the crane., In fi / poiat such as , owing to its position, the crocheta pene, ...! IA./YYlh. dsat the movement of the lifting of the jib, remains in .... ua her1soatall plane without varying c $ 11tlement the length of the sand between the pulley, in question and the ll ", /.!ialisf/. lzJ, ¯ ../& 1- charge. / "" 'if: fii.', -, - "'. -4 ohare * T = ^ ¯ c ..... lWwDw-f- - << Kr ** CAUTION ** end of field CLMS may contain start of DESC **.
BE342332D BE342332A (en)

Publications (1)

Publication Number Publication Date
BE342332A true BE342332A (en)

Family

ID=18829

Family Applications (1)

Application Number Title Priority Date Filing Date
BE342332D BE342332A (en)

Country Status (1)

Country Link
BE (1) BE342332A (en)

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