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(11) | EP 0 137 544 A2 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Perfectioning of curved extension rollers for textile fabric, paper and similar material |
| (57) In a group consisting of a plurality of curved extension rollers, each roller is
filled revolving with its extremities on respective supports of a frame, in corrispondance
of which are provided means for the drag in rotation and for the regolation of the
inclination of same rollers; each roller is constituted of a central shaft, around
which is fitted a revolving, external covering; the shaft is extending further on
one extremity of the roller and pivots on one of the supports, whereas the covering
is extending further the other extremity of the roller and is connected through a
cardan joint with the other support; a transmission with cog belts wound around the
pulley of the first support connects rigidly the rollers between them and a motor
on one side, whereas a endless screw, motorized, in which are engaged cog-wheels of
the second support connects between the rollers on the other side. |
[0001] The invention, as a subject, has a curved extension roller for textile fabric, paper and similar material.
[0002] More in particular the invention refers to the supports on the extremity of the curved rollers provided with means for the drag in rotation and for the continuous regulation of the inclination of same rollers. Each one of the two supports on the extremity of the curved rollers accomplishes a task; one of them provides the means for the motorized drag in rotation of the roller, whereas the other provides means, also motorized or by manual control, for the continuous regolation of the inclination of the roller during it's rotation.
[0003] Actually, the means of drag in rotation are constituted by a coupling of conical cog-vheels between the extremity of the roller and it's support; the latter is keyed on:a pinion connected to the pinions of the other rollers of the group by means of a chain which receives it's drive from a motor.
[0004] The means for the regolation of inclination, on the other hand, are constituted by a fork, to which is connected the other idle extremity of the roller, keyed on a pinion, which also is connected with the pinions of the other rollers by means of a chain, and which carries a mouving female thread along a endless screw driven by a motor.
[0005] It is easy to understand how both of these parts are rather complex and require a very accurate execution in order to obtain a perfect synchronism between the two mouvements composed of rotation and inclination of the roller; such syn chronism and precision of mouvements are actually necessary 1 to obtain the best results on the fabric, paper or other materials during the passage through the curved rollers.
[0006] Actually it is rather frequent that an intervention on the supports is necessary for their maintenance or repla cement due to lack of precision during the work which com promises the processing.
[0007] The aim of this invention is to propose supports provided with means for the drag in rotation and for the regolation of the inclination of the rollers of more simple realization which does not require particular processing of precision and therefore are not subject to wear or damage, nor require periodical maintenance.
[0008] In order to reach such aims and further aims and advan tages which will be understand later on, the invention propo ses the realization of a curved extension roller for textile fabric, paper and similar.material which is fitted revolving with it's extremities on respective supports of a frame, in corrispondance of which are provided means for the drag in rotation and for the continuous regolation of the inclination of the roller, characterized by the fact that the roller is constituted of a central shaft, around which is fitted a revolving, external covering; the shaft is extending further on one extremity of the roller and pivots on the said first supports; the covering is extending further the other extremity of the roller and is connected through a cardan joint with the second support; being forseen motor means for the drag in rotation of said supports.
[0009] Follows now, the description of the object of the invention, making reference to the enclosed drawings of which:
Fig. 1 is the frontal, partially dissected view of a cur ved roller and of it's supports according the invention;
Fig. 2 and 3 are respectively views according the arrows A and B of the roller of Fig. 1 and of the ones fitted with such on one group.
[0010] Usually on an extension group are fitted in parallel two or more curved rollers which are of the same type and by means of same type of supports and drive for the drag in rotation and for the regulation of the inclination, connected between them.
[0011] In Fig. 1, therefore, only one of these curved rollers and respective supports are illustrated. This curved roller 10 is constituted by a central shaft 11 on which is fitted a revol ving the covering 12, by means of ball-bearings 13. The central shaft 11 extends with an extremity 14 of the covering 12 and pivots in 15 to a hub 16 which is fitted revolving in a support 17, by means of ball bearings 18. The other extremity of the shaft 11 terminates inside the covering 12, which is screwed into a bush 19, of which a pin 20 fitted revolving in a bush 21, joint to the framework 22 which carries this group and to a box support 23 on the outside of the framework 22. In the support 23, by means of ball bearing 24, there is inserted a revol ving shaft 25, which inside the box support 23 is connected to the pin 20 of roller 10 by means of a cardanic joint 26.
[0012] The shaft 24, extremally of support 23, carries a keyed pulley 27. As one can see in fig. 2, considering that the group is composed of three parallel rollers 10, a cog belt 28 connects the pulley 27' of the intermedium roller with the pulley 27 of an external roller, whereas a second belt 29 connects the pulley 27' of the intermedium roller with the pulley 27" of the other external roller. The latter receives the revolving drive, which he transmits to the other rollers 10, from a motor 30 through a belt 31. It is obvious that this system of transmission, illustrated in fig. 2, is only simplifying and also schematic, but certainly not limiting, as such may be realized in many other practical ways of a kind destinated to transmit from a motor to the three pulleys of the rollers, a simultaneous, revolving dri ve with same, angular speed.
[0013] The hub 16 which is fitted revolving in support 17, joint to the framework 22, carries keyed-on, on his extremity 32, a gear - wheel 33. As one can see in fig. 3, always considering that the group consists of three rollers, as in fig. 2, and not observing now the transmission means of the revolving drive of fig. 2 of side A of the framework 22, but rather the means of regolation of the inclination put-on side B of the framework 22, one can observe as every hub 16 of each roller carries keyed-on an identical gear wheel 33 and all of them are engaged with an endless screw 34 which is driven in rotation by a motor 35, by means of opportune gears (not illustrated).
[0014] In Fig. 1 the roller 10 is interupted for semplicity, but one can observe that he has a quite strong curve. Roller 10 has to revolve and at the same time has to be inclinable in order to vary his angle-shot to the fabric, or paper or other material which passes through the various rollers of the group.
[0015] The motor and transmission devices of Fig. 2 and of the left support in Fig. 1, are destinated to put in rotation the roller 10. As a matter of fact the motor 30 puts in rotation the pulley 27, 27' and 27", which by means of the cardan joint 26 turn the pin 20 and with the latter the covering 12 of the roller 10. The cardanic joint 26 has the very adavantageous task, according to the invention, to transmit the rotative mouvement at any angle of inclination of roller 10 in respect to the horizontal passer-by axes of shaft 25. The motor and transmission devices of fig. 3 as well as the right support in fig. 1, have the task to allow continuously the inclination of roller 10 during it's rotation as previously described. As a matter of fact, the motor 35 puts into rotation the screw 34, which at it's turn, makes rotate simultaneously the cog-vheels 33 of each roller, and these make rotate the respective hubs 16 in which are pivo ted at 15 the pins 11 of each roller. Whereas, the covering ro tates at it's exterior, the curved shaft 11 can be inclined at any angle and therefore one realizes such combination of motion in rotative sense (external) and angolar sense (total) typical for such curved extension rollers.
1) Curved extension roller for textile fabric, paper and similar material, fitted
revolving with its extremities on respective supports of a frame, in corrispondance
of which are provided means for the drag in rotation and for the continuous regolation
of inclination of the roller, characterized by the fact that the roller is constituted
of a central shaft, around which is fitted a revolving, external covering; the shaft
is extending further on one extremity of the roller and pivots in said first support;
the covering is extending further the other extremity of the roller and is connected
through a cardan joint with the second support; motor means are forseen to drag in
rotation said supports.
2) Curved roller according claim 1 characterized by the fact to be rigidly connected
in rotation to other identical rollers parallel to such and fitted to the same framework
respectively by means of: a transmission with cog belts wound around the pulley of
the supports, of which the coverings of each roller are connected by means of said
cardan joint, and an endless screw in which are engaged cog - wheels of the supports
in which are pivoted the central shafts of each roller; motor means driving respectively
are of these said pulleys and the said endless screw.
3) Curved roller according the preceding claims as above described and illustrated
with reference to the enclosed drawings.