EP0940488B1 - Yarn-feed device for spinning machine, for throwing or texturing or similar operations - Google Patents

Description

The present invention relates to the technical sector of the manufacture of threads, chemical in particular, and relates more particularly to an improvement brought to the sets known as “deliverers” which make it possible to deliver or to call the wire at a predetermined speed in order to carry out the different processing phases that involves the manufacture of chemical threads, such as for example the phase stretching.

Previous techniques

Different types of proposals have been made to date to deliver threads during their manufacture.

On machines intended to carry out treatments after the phase proper spinning, such as texturing machines, cabling machines, twisting machines, mills, so-called strap-type deliverers are used, with pressure rolls, or capstans, in which the wire to be called or delivered is kept pressed against the surface of a cylinder or drive shaft through a pressing element (roller, roller, belt).

Besides these devices in which the wire to be called or delivered is therefore kept pinched between two surfaces, it has been proposed, in particular to achieve the stretching phase of the chemical threads produced after their actual spinning, to use, as is apparent in particular from FR-A-1 535 468 or from US-A-3,137,033, deliverers consisting of a cylinder or drum, called also "bucket", reference element (55,57) in the aforementioned French patent and (8) in the US patent, this element possibly being heated, in particular by induction and being rotated, associated with a roller or lower finger diameter, and which, in turn, is mounted free in rotation and which is spaced from the aforementioned drum, these elements being references respectively (56,58)) in the French patent and (9) in the US patent.

In these devices, the free rotation finger or roller has an axis inclined relative to the plane containing the axis of the cylinder or drum, forming several turns around these elements.

Such assemblies are particularly suitable when it is desired work at high production speeds, and above all avoid any pressure on the surface of the wires, thus avoiding damaging them.

One of the problems which arises on such delivery assemblies is that of the rotary drive of the drum or bucket which, possibly, can be heating.

The classic solution to achieve such training consists, as well as this is apparent from FR-A-1,535,468, to have a main motor which, by via a mechanical, conventional transmission, communicates speed desired on the rotary drum.

Such a mechanically reliable solution, however, leads to disadvantage, especially when one wishes to intervene on a position of work following a breakage, to stop the whole machine.

To overcome this drawback, it has been proposed, as is apparent in particular from FR-A-2 206 753, to control each deliverer by a motor individual electric, the drum or bucket and the motor rotor being mounted on a common tree.

Such a procedure makes it possible to intervene on a position of the machine, thus avoiding production losses and faults. However, she as a disadvantage of leading to complex solutions, in particular as regards concerns the speed regulation of the motors of each position. Otherwise, as each deliverer is equipped with a motor, this leads to an increase noticeable in the cost price of the machines.

Statement of the invention

Now we have found, and this is what is the subject of the present invention, a improvement made to such types of bucket and deflector deliverers which, on the one hand retains the advantages of training all of the deliverers having to rotate at the same speed via a single motor, while making this training much simpler than transmissions mechanical previously used and, more importantly, allows to intervene in a working position without stopping the operation of the deliverers correspondents of other positions.

In general, the invention therefore relates to a wire deliverer of the type constituted by a bucket or drum driven positively in rotation and a return finger, spaced from the periphery of the aforementioned cup, mounted to rotate freely on a support and whose axis is inclined relative to the plane containing the axis of the bucket, the wire to be called or delivered making a predetermined number of turns around of the aforementioned elements and therefore having a spiral path.

• le godet et le doigt de renvoi sont montés sur un bras articulé par rapport à un support monté fixe sur le bâti de la machine ;
• l'axe supportant le godet est monté sur le bras par l'intermédiaire de paliers et déborde latéralement par rapport à celui-ci et est équipé, à son extrémité libre, d'un galet d'entraínement qui, en position de travail, s'appuie contre un arbre moteur, s'étendant sur toute la longueur de la machine et commun à toutes les positions de travail qu'elle comporte ;
• le bras articulé est associé à des moyens qui, d'une part, maintiennent le galet d'entraínement en appui, avec une pression réglable, contre l'arbre moteur en fonctionnement normal et, d'autre part, sont neutralisés lorsque le bras articulé est écarté dudit arbre d'entraínement.

The deliverer according to the invention is characterized in that:

• the bucket and the return finger are mounted on an arm articulated relative to a support mounted fixed on the frame of the machine;
• the axis supporting the bucket is mounted on the arm by means of bearings and projects laterally with respect thereto and is equipped, at its free end, with a drive roller which, in the working position, s 'presses against a motor shaft, extending over the entire length of the machine and common to all the working positions which it comprises;
• the articulated arm is associated with means which, on the one hand, keep the drive roller in support, with an adjustable pressure, against the motor shaft in normal operation and, on the other hand, are neutralized when the articulated arm is removed from said drive shaft.

According to a simple embodiment, the means ensuring the pressure against the motor shaft are constituted by a spring, one end of which is integral of the bearing supporting the bucket and the other end of which is connected to the fixed support mounted on the machine frame, the pivot axis of the support arm being positioned so that, in the working position, the spring tends to press the bucket drive roller against the motor shaft and, in the raised position, it keep the support arm in a position spaced from said drive shaft.

According to a preferred embodiment, the bucket is associated with conventional heating means, such as electric heating, heating by induction.

The invention and the advantages which it brings will however be better understood thanks to the example of embodiment which follows, given below by way of indication, and non-limiting, and which is illustrated by the attached diagrams.

Brief description of the drawings

The attached figures illustrate in detail the structure and operation of a deliverer produced in accordance with the invention.

Figure 1 is a front elevational view showing the structure of a line of deliverers produced in accordance with the invention, mounted on a machine comprising a plurality of identical working positions arranged side by side, a deliverer being represented in full, and a second partially and the line of the machine which can include a large number of such deliverers.

Figure 2 is a side view of Figure 1 showing in more detail the positioning of the various elements constituting the deliverer in accordance with the invention, in position sent on a drive shaft common to a line of issuers.

Figure 3 is a top view of Figure 2.

Figure 4 is a cross section through the plane XX and X1 of the Figure 2, showing in detail how the bucket can be heated and above all the structure of the articulated support arm and the return means allowing ensure the support of the drive roller against the motor shaft.

Way of realizing the invention

Referring to the attached diagrams, the deliverer according to the invention, designated by the general reference (1), is of the type constituted by a bucket or drum (2), driven positively in rotation and which is associated with a return finger (3). This return finger (3) is spaced from the periphery of the cup (2) and is mounted free in rotation on a support (4). The finger (3) is mounted on the support (4) by through a bearing (5) so that its axis is inclined relative to the plane containing the axis of the bucket (2) so that the wire (F) to be called or delivered makes a number of predetermined turns around a bucket (2) / finger (3) assembly having a spiral route.

According to the invention, the cup (2) and the finger (3) are mounted at the end of an arm, designated by the general reference (6) which is articulated by compared to a support (7) mounted, meanwhile, on the machine frame. So simple, the articulated arm (6) consists of a U-shaped profile (see Figure 1) the side walls (6a, 6b) of which support a bearing (27) inside which is mounted a shaft (8), free to rotate relative to said arm (6) by through bearings (9a, 9b).

The support (4) of the return finger (3) is, for its part, mounted directly on the upper face of the arm (6).

The articulation of the arm (6) on the machine frame is obtained by two bearings (10a, 10b) provided laterally on the support (7) by means of two axes (11a, 11b).

The shaft (8) projects laterally on either side of the arm (6) and supports, at one of its ends, the bucket (2) and at its other end a roller drive (12) preferably comprising a peripheral coating (13) in rubber for example.

This roller (12), in the working position, shown in FIGS. 1, 2 and 3, is supported by a motor shaft which extends over the entire length of the machine and which is common to all the work positions it contains.

If the machine requires, for each working position, several deliverers there will therefore be as many drive shafts as there are series of deliverers.

The motor shaft (13) is constructed so that it has zones large diameter (14) against which the drive rollers (12) bear separated by a recessed area (15) allowing therefore to have a clearance of the bucket (12) relative to the surface of said drive shaft.

Furthermore, this tree (13) can, as is more particularly apparent Figures 1 and 2, be constituted by a continuous axis (15) on which are mounted a succession of cylindrical elements intended to form the parts (13) and the surfaces support (14).

Finally, the articulated arm (6) is associated with means which allow a hand, maintaining the drive roller (12) in support, with an adjustable pressure, against the motor shaft in normal operation and, on the other hand, ensure also maintaining the articulated arms in a position separated from said shaft when you want to intervene on a position.

According to a simple embodiment, illustrated in FIG. 4, means ensuring the pressure against the motor shaft consist essentially of a spring (17), arranged inside the arm between the walls (6a, 6b) and one of which end is integral with the bearing (27) supporting the bucket (2) and the roller drive (12), and the other end of which is connected to the support fixed (7) integral with the frame and, in this case, via a pin (18) which can slide in lateral lights (19a, 19b) provided on the faces side (7) of the support.

Thanks to such a structure and positioning of the pivot axis (11a, 11b) of the support arm, the spring tends to press the drive roller (13) of the bucket (2) against the motor shaft in the working position and, in the raised, the support arm is also maintained by the action of the spring (17).

Finally, as illustrated in Figure 4, the bucket is preferably associated with induction heating means, or electric heating conventional resistance, the connections of which pass inside the arm (6).

Such a design of deliverers has very many advantages by compared to the previous solutions by the fact that one obtains a synchronization perfect speeds of the deliverers that the machine comprises, and that it is possible to intervene in a working position by simple disengaging by raising the arm support (6).

Claims (3)

1. A thread delivery device (1) for a textile spinning, throwing, texturing or suchlike machine, consisting of a bowl or drum (2) driven positively in rotation and of a guide finger (3) which is spaced from the periphery of the abovementioned bowl (2) and is mounted freely in terms of rotation on a support (4) and the axis of which is inclined relative to the plane containing the axis of the bowl (2), the thread to be taken up or to be delivered executing a number of predetermined revolutions around the abovementioned elements in a spiral run, wherein:

   the bowl (2) and the guide finger (3) are mounted on an arm (6) articulated relative to a support (7) mounted on the frame of the machine;

   the shaft (8) supporting the bowl (2) is mounted on the arm by means of bearings (9a,9b) and projects laterally relative to said arm and, at its free end, is equipped with a drive roller (12) which, in the working position, bears against a drive shaft extending over the entire length of the machine and common to all the workstations which the latter comprises ;

   the articulated arm (6) is associated with means which, on the one hand, hold the drive roller (12) in bearing contact, with adjustable pressure, against the drive shaft during normal operation and, on the other hand, are neutralized when the articulated arm is moved away from said drive shaft.
2. The delivery as claimed in claim 1, wherein the means ensuring pressure against the drive shaft consist of a spring (17), one end of which is integral with the bearing (27) supporting the bowl (2) and the other end of which is connected to the fixed support mounted on the frame of the machine, the pivot axis of the supporting arm (6) being positioned in such a way that, in the working position, the spring (17) tends to lay the drive roller of the bowl against the drive shaft and, in the raised position, said spring holds the supporting arm in the position moved away from said drive shaft.
3. The delivery as claimed in one of claims 1 and 2, wherein the bowl (2) is associated with heating means.

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