FR2673206A1 - MACHINE FOR DISPLAYING A TEXTILE PIECE. - Google Patents

Abstract

a) Machine for unwinding a piece of textile b) Machine characterized in that the unwinding path comprises, - a centering means for aligning the strand of textile leaving the tank on the unwinding path (ZZ), - a twist detector (10) comprising a comb movable in a direction (XX ') transverse to the unwinding path (ZZ) by cooperation with the running textile strand (11), and a means (12) for detecting the position of the comb and providing a detection signal (S), - a drive means (5) in rotation of the rotating bowl (4), - a control unit (13) receiving the detection signal from the twist detector (10) to control the rotation of the bowl (4) in the unwinding direction.

Description

"Machine to untwist a textile piece".

  The present invention relates to a machine for unraveling a textile piece, this machine comprising a rotating bowl receiving a textile piece to be unscrewed and a means of appeal which pulls the piece

  textile through the unscrewing path.

Such a machine is known.

  It should be remembered that twisting of textiles is a problem that occurs systematically in all processes or in all textile processing plants. This problem concerns textiles, whether they are circular textiles or offshore, after free dyeing. OVERFLOW, JET, CBS, TOURNIQUET or other type of dyeing machine In fact, these textiles inherently have a natural tendency to twist. In addition, there is the hydrodynamic effect of the dyebaths. Thus, a jersey mesh piece naturally wiggles more than a piece of coast.

  the effect of a machine which, as indicated below,

  above, may have a tendency to tenderness.

  It is already known to untwist textile pieces For this, we use a rotating bowl that receives the piece and draws the piece on a high height (ten meters) by a means of call such as cylinders The operator who note the appearance of tendrils on this height rotates the rotating vat in the opposite direction of the spin to unravel. The results obtained with such installations are more or less good Added to this is the prohibitive size of these installations which can only be used in very specific cases. However, for the quality of the treatments carried out on the textile parts, would be desirable to be able to unscrew the pieces fairly regularly and to

many workstations.

  Such a possibility is not given by

existing facilities.

  The present invention proposes to create a machine for unraveling textile pieces, which is of an extremely simple design and construction, very compact and can be adapted to multiple processing stations and having a

very important performance.

  To this end, the invention relates to a machine for unraveling a textile part, characterized in that the unraveling path comprises a centering means for aligning the textile strand at the outlet of the vessel to the unscrewing path, a spin detector comprising a comb movable in a direction transverse to the unwinding path by cooperation with the running textile strand, and a means for detecting the position of the comb and providing a detection signal, a means for rotating the rotating bowl, a control unit receiving the detection signal of the spin detector for controlling the

  rotation of the tank in the direction of unscrewing.

  The twister detector comb takes with its "teeth" in the interval of the folds of the textile strand, by a meshing effect between the comb and the tissue The comb can be constituted by a single organ, movable transversely; it can also be constituted by two bodies facing each other and defining an interval traversed by the

textile product.

  The twisting machine according to the invention allows almost immediate detection of a spin or more exactly of a spin primer Indeed, the speed of the detection allows a reaction by servocontrol of pivotal movement of the revolving vessel very quickly. this way there can be a large accumulation of tendrils between the rotating bowl and the detector which allows a

instant wiping.

  As a result, at the level of the spin detector, only a spin primer can appear, and this primer is sufficient, thanks to the great sensitivity of the detector, to control a movement.

corresponding unscrewing.

  Moreover, this very high sensitivity (very short reaction time) of the detector is linked to the multiplier effect obtained by detecting the "screwing" movement of the textile strand in the comb As already explained above, this movement is similar to that of a screw and a rack, the screw being constituted by the textile strand and the rack by the comb This detection is all the more sensitive that the twister detector comb consists of two grooved cylinders forming an interval for the passage of the fabric strand mounted free in translation on their axis and position detector for detecting the translation position of the cylinders to derive the spin detection signal especially if the cylinders are free to rotate on the axes . When the folds of the textile are straight, that is to say in the absence of twisting, the textile strand guided along the path of movement by the centering member passes on the comb without the

move.

  Thanks to the efficiency of the spin detection, it is possible to very significantly reduce the length of the unscrewing path between

the tank and the detector.

  Thus, the machine according to the invention has a very compact construction and very compact, low height since the tendrils of the fabric do not require a great length to be detected but can be directly at a level of

tendril detector.

  This makes it possible to effectively adapt such machines to many workstations, either for dry interventions or for wet interventions. Thus, such a stripping machine can be provided in front of a quality control table of the unbleached with a seam station for sealing the knitting and sewing holes end-to-end, in front of a calendering station, in front of a cutting station to open a circular strand and the

put off.

  In the case of wet treatment stations, such a twisting machine can be provided after the centrifugal spinning, upstream of the dryer station, in front of a pre-impregnation station for the headscarf.

the application of primers.

  These are however only a few examples of application of the machine according to the invention. According to another characteristic it comprises, downstream of the twist detector, a pivoting expander rotatably mounted with respect to the running path of the textile strand, for placing the textile strand relative to the means of call, the swivel expander of controlled way to compensate for the possible spin residue downstream of the detector. This expander makes it possible to prepare the textile strand well (in the case of a tubular textile)

  for the receiving means, laying it flat.

  The possible pivoting movement of the expander makes it possible to correct any weak tendon residues, but it is interesting to correct if necessary to perfect the quality of the treatment. According to a particular feature, the expander is constituted by a pivoting assembly comprising a passage through which the textile piece, flat, room in which are placed the expander members. In addition, according to another feature, the swivel expander comprises a movable member formed of a circular ring supported by rollers on a rail being pivotally driven by

a motor.

  Finally, to allow a particularly rapid transfer of the textile piece of the carriage in the tank, the machine comprises a means for feeding the rotating bowl constituted by pallet rollers and the appeal means is constituted

by two vane cylinders.

  The present invention will now be described in more detail with the aid of the accompanying drawings, in which: FIG. 1 is a perspective view of the entire machine to be unscrewed. FIG. 2 is a top view, in detail, of a spin detector according to a mode of

embodiment of the invention.

  FIG. 3 is an axial half-section of

the swivel expander.

  FIG. 4 is a detailed view of

the swivel expander.

  According to FIG. 1, the twisting machine is composed of a feeding means 1 formed for example of two vane rollers which extract the piece of textile 2 from the carriage 3 to transfer it into a

rotating bowl 4.

  The tank can be controlled pivotally about its axis ZZ and in both directions R and R'par

  an unrepresented motor housed in the base 5.

  This axis ZZ, vertical, is at the same time the path of unscrewing, followed by the strand of

  textile in its crossing of the machine.

  The machine also comprises a spin detector consisting of a centering member 6 placed in a fixed position above the tank 4, in the axis ZZ and

a comb 10.

  This centering member 6 is formed of a ring 7 carried by two rods 8 connected to the frame 9 of the

machine.

  The comb 10 cooperates with the folds of the textile strand 11 extracted from the tank 4 to be unscrewed because the folds of the fabric constitute in a way the threads of a screw, and the comb plays the role of a

rack.

  For this, the comb 10 is movable in a direction XX ', transverse, not necessarily

  orthogonal to the ZZ direction (ie

say unaligned on ZZ).

  According to the direction of the twist, that is to say the pitch of the screw thread formed by the fabric swirl, the comb 10, free in translation in the direction XX ', is pushed or moved towards X or X'. position detectors 12 detect this movement or displacement and transmit signals S corresponding to the control unit 13 This unit 13 controls the movement of the tank 4 in the direction of rotation opposite to that of the pitch of the thus detected swirl (and with an identical amplitude or

greater than that of the step).

This results in a twisting

automatic textile strand 11.

  FIG. 2 schematically shows a particular embodiment of such a comb 10, no

detailed in Figure 1.

  Above the detector 10 is a pivoting expander 14 composed of a crew 15 capable of pivoting about the axis ZZ, in both directions of the arrows M and N. This pivoting assembly 15 can execute at most one turn on itself It comprises a light 17 crossed by the textile strand 11 If it is a textile tube it receives rings 18 which cooperate with unrepresented external organs, through the fabric Ce known way in

self will not be detailed.

  The pivoting of the crew 15 is provided by a motor (see FIG. 3) controlled from the control unit 13 receiving control signals from an operator detecting a residual spin.

  at the exit of the swivel expander 14.

  Finally, the unraveling machine comprises a means of call 19 formed by two vane cylinders 21 which pull the textile strand through the machine to supply it, spread and unscrewed, to a means

  reception desk or workstation 22.

  The control unit 13 manages and controls the different parts of the machine by lines L 1, L 2, L 3, L 4 connected respectively to the feed means 1, to the motor of the tank 4, to the swivel expander 14 and by means of call 19 Spin detection signals, S, are transmitted by

  the sensors 12 to the unit 13 by the line L 5.

  According to the embodiment of FIG. 2, the comb 10 of FIG. 1 consists of two cylinders 101, 102 provided at their periphery with grooves

  103 straight lines, for example of different depths.

  The cylinders are free to rotate and especially free in translation on axes 104, 105, parallel mounted in bearings 106, 107 carried by supports 108, 109 connected by springs of

recall 110, 111.

  At each of their ends, the cylinders 101, 102 are provided with detection rings 112, 113, 114, 115, for example a metal ring (the bodies of the cylinders 101, 102 being made of plastic) to cooperate with sensors 116, 117, 118, 119 detecting the presence or absence of a ring and consequently the position in translation of the cylinders

101, 102 on the axes 104, 105.

  However, this position is related to the spin of the fabric due to the effect of rack / screw between the folds of the fabric and the grooves (or teeth) of the cylinders

101, 102.

  FIG. 2 shows the interval 120 between the two cylinders, through which the strand of

textile, as well as the ZZ axis.

  The rolls 101, 102 are pushed into the positions represented in the figure by a slight excess of unscrewing. As soon as a spin primer appears, this results in a relative translation of the rolls 101, 102 in the direction of the arrows C, D,

  movement that is detected as indicated above.

  above. FIG. 3 is an axial half section of the swivel expander 14 showing the moving element 16 formed of a circular ring 130 supported by rollers 131, 132 on a rail 133. The ring 130 also cooperates with a pivoting detector 134 and a motor 135 with a driving roller 136, in particular

a brake motor.

  This FIG. 3 also shows the shape of one of the warheads 137 cooperating with a ring placed at

  inside the tubular textile strand.

  FIG. 4 shows in section two warheads 137,

the ring 138 and the fabric 11.

Claims (8)

R E V E N D I C A T IONS   1) Machine for unraveling a textile piece, comprising a rotating bowl receiving the textile piece to be unscrewed and a means of appeal for pulling the textile piece on a detouring path towards a receiving means, characterized in that the unscrewing path comprises a centering means for aligning the textile strand at the bowl outlet on the stripping path (ZZ), a spin detector (10) comprising a comb movable in a direction (XX ') transverse to the stripping path (ZZ ) by cooperation with the traveling textile strand (11), and a detecting means (12) for the comb position and providing a detection signal (S), a drive means (5) for rotating the vessel rotating (4), a control unit (13) receiving the detection signal of the spin detector (10) for controlling the rotation of the tank (4) in the direction of the deviation. 2) machine for unraveling a textile part according to claim 1, characterized in that it comprises, downstream of the auger detector (10), a pivoting expander (14) rotatably mounted relative to the running path (ZZ) of the textile strand (11), for placing the textile strand (11) with respect to the means of call (19, 204), this expander (14) pivoting in a controlled manner (13) to compensate for the residue   possible spin downstream of the detector (10).   3) machine according to claim 1, characterized in that the twister detector comb (10) consists of two cylinders (101, 102) with grooves (103) forming a gap (120) for the passage of the strand of textile (11), (ZZ) mounted free in translation on their axis (104, 105) and position detector (116 119) for detecting the translation position of the cylinders (101, 102) in order to deduce the detection signal ( S) twisting.   4 ') devrill machine according to claim 3, characterized in that the cylinders (101, 102) are mounted rotatably on their axis.    ) devrill machine according to claim 3, characterized in that the two axes (104, 105) of the cylinders (101, 102) are drawn one   against the other by springs (110, 111).   6) devriller machine according to claim 2, characterized in that the expander is constituted by a pivoting assembly comprising a passage (17) traversed by the textile piece (11), flat, room in which are placed the organs of enlarger (138, 137).   7) devriller machine according to claim 2, characterized in that the pivoting expander (14) comprises a movable element (16) formed of a circular ring (130) supported by rollers (131, 132) on a rail (133) being driven pivoting by a motor (135).   8) devrill machine according to claim 1, characterized in that it comprises a means (1) for feeding the rotating bowl (4)   consisting of vane cylinders.   9) devrill machine according to claim 1, characterized in that the means of call (19) is constituted by two cylinders to pallets (20, 21). 10)   Machine according to claim 1, characterized in that the centering member (6) is formed of a ring (7) fixed, centered on the unscrewing path.