EP0137544B1

EP0137544B1 - Perfectioning of curved extension rollers for textile fabric, paper and similar material

Info

Publication number: EP0137544B1
Application number: EP84201291A
Authority: EP
Inventors: Mario Bianco
Original assignee: Individual
Current assignee: Individual
Priority date: 1983-09-12
Filing date: 1984-09-08
Publication date: 1989-12-06
Also published as: DE3480648D1; EP0137544A2; IT1168833B; EP0137544A3; ATE48406T1; IT8367941A0

Abstract

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.

Description

The invention, as a subject, has a curved extension roller for textile fabric, paper and similar material.
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 regulation of the inclination of the roller during it's rotation.
Document BE-A-768516 discloses a curved extention roller for textile fabric, paper and similar material with its extremities fitted rotatably in respective first and second supports in a frame and rotatably driven by a first motor, means being provided for the continuous regulation of the inclination of the roller, the roller comprising a central shaft around which is fitted a revolving external covering which is rotatably driven relative to the shaft by the first motor, the shaft extending beyond the covering at one extremity of the roller and being pivotally connected to one end of a stub shaft rotatably mounted in the first support, the other end of the roller being connected with the first motor through a cardan joint within the second support, a second motor being connected to the other end of the stub shaft in the first support for rotation of the central shaft to provide regulation of the inclination of the roller.
In this device the connection between the covering and the cardan joint is realized by means of gear wheels and cog-belts.
It is easy to understand how the connection of such parts is rather complex and require a very accurate execution in order to obtain a perfect synchronism between the two movements composed of rotation and inclination of the roller; such synchronism and precision of movements are actually necessary to obtain the best results on the fabric, paper of other materials during the passage through the curved rollers.
Furthermore it can be necessary a frequent intervention on the connection for its maintenance or replacement due to lack of precision during the work which compromises the processing.
The aim of this invention is to propose supports provided with means for the regulation 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.
In order to reach such aims and further aims and advantages which will be understood later on, the invention proposes the realization of a curved extension roller for textile fabric, paper and similar material as described on BE-A-768516 and further characterized in that the covering extends beyond the central shaft at the other extremity of the roller and is connected to the cardan joint by means of a pin rotatably mounted in the second support.
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 curved roller and of it's supports according to 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.

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.
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 revolving 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 revolving shaft 25, which inside the box support 23 is connected to the pin 20 of roller 10 by means of a cardanic joint 26.
The shaft 24, extremely 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' ofthe 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 drive with same, angular speed.
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 regulation 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).
In Fig. 1 the roller 10 is interupted for simplicity, 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.
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 advantageous task, according to the invention, to transmit the rotative movement 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-wheels 33 of each roller, and these make rotate the respective hubs 16 in which are pivoted at 15 the pins 11 of each roller. Whereas, the covering rotates 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.

Claims

1. Curved extension roller (10) for textile fabric, paper and similar material with its extremities fitted rotatably in respective first (17) and second (23) supports in a frame (22) and rotatably driven by a first motor (30), means being provided for the continuous regulation of the inclination of the roller, the roller (10) comprising a central shaft (11) around which is fitted a revolving external covering (12) which is rotatably driven relative to the shaft (11) by the first motor (30), the shaft extending beyond the covering (12) at one extremity (14) of the roller (10) and being pivotally connected to one end of a stub shaft (16) rotatably mounted in the first support (17), the other end of the roller (10) being connected with the first motor (30) through a cardan joint (26) within the second support (23), a second motor (35) being connected to the other end of the stub shaft (16) in the first support (17) for rotation of the central shaft (11) to provide regulation of the inclination of the roller characterized in that the covering (12) extends beyond the central shaft (11) at the other extremity of the roller (10) and is connected to the cardan joint (25) by means of a pin (20) rotatably mounted in the second support (23).

2. Curved roller according claim 1 characterized by the fact to be rigidly connected in rotation to other identical rollers (10) parallel to such and fitted to the same framework (22) respectively by means of: a transmission with cog belts (28) wound around the pulley (27) of the supports, to which the coverings (12) of each roller (10) are connected by means of said cardan joint (26) and an endless screw (24) in which are engaged gear wheels (33) of the supports in which are pivoted the central shafts (11) of each roller (10); motor means driving respectively one of these said pulley (27) and the said endless (24).