DE2327160A1 - ROPE CARRIER FOR THE HEAD UNWINDING OF A RAND OF THREAD - Google Patents

Description

PATENT ADVOCATE

DR. HANS ULRICH MAY

D 8 MUNICH 2, OTTOSTRASSEIa

TELEaRAMMEtMAYPATENTMaNCHEN 2327160

TELEPHONE C0S1O 39 38 82

D-12-P-1/1176 Munich, May 28, 1973

Dr.M./se D-12-G-1 / 1176a

BP 3016
DOS. 73943

Dominique Delerue in F-59420 Mouvaux / France

Strand carrier for the head unwinding of a strand of thread.

The invention relates to a strand carrier for the head unwinding of a strand of yarn in the direction of the axis of the strand, which is stretched between two essentially parallel arms rotatable about their axes, which are held in a cantilevered manner on a holder which is essentially perpendicular to them and which is on a chassis between two Positions is pivotable, namely a vertical, for laying the strand, and a horizontal for unwinding the strand, wherein the holder is in the latter position under the arms and at least one arm is held on a slide on the holder and in the The horizontal position of the ¹ holder is approximated to the other arm in order to make it easier to put the strand on, and when the holder is swiveled back down and in its horizontal position it is removed from the other arm in order to keep the strand taut for the entire duration of the unwinding .

309850/0471

When spinning, starting from bobbins, the thread strands are obtained in the form of a cylinder of threads, which are wound on a special machine are, which forms the thread strands around an expandable drum on which the thread with the help of a thread guide is distributed. The thread strands are then stabilized by binding threads (Fitzfäden) and various treatments, such as Shrinking, dyeing or the like, subjected and unwound thereon, to obtain bobbins from treated threads. Increasingly larger and heavier strands of thread are produced to improve productivity and the unwinding must take place at ever greater speeds «

A first type of strand of thread is on the expandable drum formed with a thread guide, which the thread while constantly crossing according to a fixed route, that is, with a fixed Length between two fixed ends, distributed. The strand of thread then consists of successive crossed layers, which only develop in a radial or diametrical direction. This is a common strand of thread as shown in Fig. 2 of the accompanying drawings. As the thread guide on the two The end points of its back and forth movement inevitably run more slowly, the thread strand has beads 21, 22 on its edges. The width of these strands of thread is limited due to the limited running distance of the thread guide.

Another newer type of strand of thread is formed in that the path of the thread guide is slowly and gradually shifted in one direction, around the thread strand in the direction of its To extend the axis, if one denotes an axis that corresponds to the axis of the expandable drum on the the thread strand is formed. This type of strand of thread is in

309850/001

Pig. 1 and is referred to as a section or axial strand, which no longer has beads 21 and 22 and a larger amount of thread contains.

These strands of thread are held between the two arms 1 and 2, which revolves around itself around a line parallel to the axis of the thread strand You can turn the axis in order to tension it and to lay it correctly, with the arms turning around a little and the strand of thread turning behaves in a way like a drive belt. The unwinding takes place but not by turning the strand of thread, so to speak, but by moving the thread from the outside upwards the axis of the thread strand and the axes of the arms 1 and 2 withdraws. For this purpose the arms 1 and 2 are cantilevered <£ on a holder 3 (Fig. 3, 4 and 5} held, and a high unwinding speed is achieved.

To make it easier to lay the strand of thread, it has been around for a long time known, the two arms 1 and 2 at the moment of laying on each other to approach and then to move them away from each other for unwinding «However, when laying the thread strand, the vertical position is of arms 1 and 2 bothersome, and it happens that the strand is bad is launched. A pivotable holder 3 has therefore been provided, who can stand vertically so that arms 1 and 2 are horizontal run and you the strand 18 on an upper horizontal Arm 2 can be placed, which is slightly approximated to the arm 1 to be placed, whereupon the two arms 1 and 2 move away from each other, to tension the strand of thread, and the holder 3 is pivoted back to bring the strand of thread into the unwinding position » It is then an additional pushing apart of arms 1 and 2

S -

possible to tighten the strand of thread strongly - this way it can one strands of thread with a 'large. Treat thread content.

3098 ^ 0/0471 ■■

It happens, however, that the tension of the thread twangs at the moment the pivoting back of the holder 3 is not sufficient, so that the windings of the thread strand shift. It is precisely this disadvantage that is intended to be remedied by the invention »

In addition, if you subject a large strand of thread to a certain tension, the tension on each winding becomes too great if the volume of the strand of thread decreases. This disadvantage is also intended to be eliminated by the invention.

Furthermore, at the end of unwinding, the strand lengthens and the tension of the last windings becomes insufficient because of the limited running distance of the exciting arm. This disadvantage is also eliminated by the invention.

In addition, it happens that the tension from one edge of the thread strand to the other is different, so that the windings do not unwind evenly and at times whole bundles of yarn together are peeled off, which tangle with each other and a thread breakage and interruption of processing. This disadvantage is also intended to be remedied by the invention.

Finally, the holder 3 must during the unwinding and in the course assume a stable position for the weight loss of the strand, what is achieved by a device according to the invention.

More precisely, it is only too well known in the unwinding operation that the windings lying at the lower end of the horizontally running thread strand with a vertical axis always show the tendency to separate in packets and take the windings above them with them, which results in interruptions and thread breaks, Man must therefore try _f this lower part to tension the yarn strand better. Mari achieves this with two cylindrical clamping

poor. 1 and 2, which are arranged parallel to each other, but in the case of a section or axial strand of large dimensions, it is found that if a force is exerted on the lower part of the two arms and 2 to push them apart, the upper parts of these are less than move the lower parts apart as the mechanical parts that support the two arms bend. It follows that the lower part of the thread strand is sufficiently tensioned at the end of the unwinding, but too much at the beginning of the unwinding. -.

In the case of a common strand of thread, this is the overload of the thread more noticeable at the edges of the strand, and since the thread strand is less wide, shorter tensioning arms can be provided so that the bending moment acting on them, lower and consequently the bending is less.

-j

One must therefore provide different devices for the section or axial thread strands and for the usual thread strands, what also happens with the invention.

It is also known to have one of the arms 1 or 2 on a slide 12 to arrange and put it under spring pressure au that the movable Arm slightly towards the end of the unwinding of the strand of thread presses to tension the final windings. However, this spring has no effect whatsoever to tension the at the beginning of the unwinding Strand of thread. This disadvantage is intended to be eliminated by the invention will.

The invention should therefore achieve that the windings of the thread strand during the pivoting of the holder and during do not shift the unwinding and especially the tension of each winding between the beginning and the end of the unwinding is possible.

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Lets slightly changed and since <3 also the actuation of the holder is easy and safe *

In the case of a strand carrier, the given task becomes the one specified at the beginning Type according to the invention by the following combination of features solved:

a) the arm furthest from the holder's joint approaches the other arm by its own weight when lifting the holder »while the arm closest to the joint of the holder momentarily, when the holder is vertical, can move away from the other arm. to tension the strand with a low tensile force, and when the holder is kicked, the holder swivels back into its normal position when the second arm exerts a considerable tensioning effect;

b) the two most distant coat lines of the the two arms together form one that is variable in the course of operation Angle »which, viewed from the holder, opens increasingly and its initial value depending on the type of thread strand treated is different}

c) the clamping of the second arm takes place with a wide range. sen variable elasticity, so that at the booth of the unwinding Displacement is significant and the resilience is low.

d) 'an elastic device. contributes to the holder during to hold the unwinding in a horizontal position.

To prevent unwanted lifting, the holder is automatically locked in a horizontal position, and although an elastic device is used for this purpose, which the holder with a force gradually decreasing in the amount of its folding back pulls upwards, the position of the unstable equilibrium of the holder is slightly in front of its horizontal position. According to

309850/0471

In a preferred embodiment, the slide is from the joint the arm furthest away from the holder to the chassis

v
connected by a gelerik rod with variable effective length, which always strives to lengthen under the action of an elastic force, so that the points of articulation of the articulated rod on the chassis and the slide on the one hand and the points of articulation of the arm on the chassis on the other hand the points of a triangle with two variable sides and a short fixed side, the side formed by the hinge rod going through a smallest length when the three points are in a line, the hinge rod as an elastic rod pushing the holder upwards with a variable force, which in the extent to which the three points of the triangle move in a line decreases as the holder, the arms, and their loads grow by their own weight with a_ as the arm is lowered and the alignment of the three points of the triangle approaches in line variable force to be pulled down, so that the weight just before the holder d he horizontal position assumes a greater force than the lifting force exerted by the elastic joint rod.

The elastic articulated rod preferably consists of a rod that is hinged to the chassis and can be freely displaced in an opening of the slide Rod and a concentric spiral spring that under. Pressure works and on the one hand on the perimeter of the opening and on the other hand, abuts a stop that can be displaced on the rod.

The slide of the arm closest to the joint of the holder is can be displaced in the direction of the other arm, its displacement movement: being limited by a stop on which it be locked, karasu Conveniently, the shift

this slide can be controlled by a hook.

Depending on the type of strand to be treated, the axes of the arms are diverging, converging or frustoconical with its large base facing the holder. Obviously the axes of the arms flex, but it can be arranged that they yield deliberately and elastically under the tension of the cord.

According to a final characteristic of the invention, the tension of the second arm is achieved with a strongly varying elasticity With the help of two springs arranged on the elastic joint rod, whose effects are superimposed. So you see a strong pen which yields only a little and ensures the tension of the strand at the beginning of unwinding, and a very flexible, weak one Spring before, which ensures the tension of the last windings of the strand at the end of the unwinding.

If it is provided that the axes of the arms 1 and 2 diverge and stretching a strand between these two arms, the axes of these arms pivot and finally take one essentially parallel position. In this way, all parts of the strand are subject to suitable tension in the unwinding position during the entire unwinding process. This training is preferable for section or axial strands.

In the case of normal strands of thread, short arms with diverging ones are used Axes or parallel axes but frustoconical Arms with the large base at the bottom in order to avoid the disadvantages of the upper beads 21.

The use of several springs with different characteristics

to push the arms 1 and 2 apart enables the

'309850/0471

23271BQ - % - -

maintenance of an almost equal tension of the windings int course of the bending, this is how you avoid it

Package-shaped detachment of windings, easy to block the Device-leads. .

Finally, the springs tensioning the strand make it easier to stabilize the holder in a horizontal position during unwinding.

The invention is illustrated by the following description of embodiments shown in the accompanying drawings. Show it:
1 shows a section of the axial strand on the two arms of the strand carrier; -

Figure 2 is a side view of a common strand on both of its Arms in the unfolded position;

Figures 3 * 4 and 5 schematically three types of the erfindungsge · - moderate strand carrier with each diverging, converging and parallel, but conical armsj

Fig. 6, 7 and 8 schematically a first embodiment of the continuous support of the invention, shifts in the mar from the joint of the holder farthest enfernte arm on a slider? 6 shows a view of the strand carrier with the shark standing vertically

ter in the position for placing the Strangesι Fig _o 7 is a view of the strand holder with the holder moved back

and the strand in progress; . 8 shows a view of the strand holder with the holder folded back 'and completely unwound strand;

Figures 9, 10 and 11 schematically show a second embodiment of the strand carrier according to the invention, in which the two arms move on slides and move the slide of the arm closest to the joint of the holder to the other arm

30 98 50/0 47 1

232716Q ^

to diiirqh a stop is limited; '

Pig. 9 shows a view of the strand holder with the holder raised, with the two arms in their position closest to each other enabling the strand to be placed; 1 shows a view of the strand carrier with the holder raised, the arm closest to the joint of the holder being released, and the strand; stretch something zti;

Pig »11 a view of the strand carrier with the holder folded back in-the unwinding position.

With the various Aiasleittttigsformen of the strand carrier according to the invention For the sake of simplicity, similar elements are provided with the same reference numbers:? i.

The device is zms. Unwinding either a section or axial strand 18 (FIG. 1) or a diametrical, conventional strand 181 (FIG. 2) is determined. The axial strand 18 has the shape of a spindle, while the diametrical tray 181 has the aforementioned beads 21 and 22. The strands 18 xxnä 181 are stretched between the arms 1 and 2, which are cylindrical or conical bodies of revolution which can rotate around themselves on ball bearing axles, as is known. The arms 1 and 2 are held essentially parallel to one another on a holder 3 perpendicular to them. The holder 3 can assume two positions, namely vertical (Figures 6, 9, 10) or horizontal (Figures 7 "» 8 ₉ 11) in that it swings around a joint 4, the horizontal axis of which with a ^: chassis 5, the The axis of the always movable arm 2 is held on a slide 11 which can be displaced along the holder 3. In the embodiment of Figures 6, 7 and 8, the axis of the arm 1 is rigidly attached to the holder 3. At the embodiment of Figures 9, 10 and 11 is the axis of the ar-

309850/047 1

mes 1 attached to a slide 12 which can be moved along the holder 3 The displacement of the slides 11 and 12 on the holder 3 is facilitated by any known devices, in the present case pairs of rollers 23 are provided for this.

The displacement of the slide 11 along the holder 3 is through an elastic joint rod 7 controlled, which is connected to a joint 6 on Chassis is hinged and with the slide 11 by one with this firmly connected foot 24 is connected »the one hole 10 has through which the rod 7 passes and in which it is displaceable is. A stop 8 is provided on the rod 7, and concentric spiral springs 9 and 20 are on the rod 7 between the stop 8 and the foot 9 clamped. The spring 9 has a low Spring force and great compressibility, the spring 20 a low Compressibility and great spring force. The spring 9 is much longer than the spring 20. The stop 8 is adjustable in any position along the rod 7 and can in this position through an adjusting screw 25 can be blocked.

To control the displacement of the slide 12 on the holder 3 A hook 14 articulated at point 16 on the slide 12 is used, the end 15 of which can be attached to the pin 13 »the hook 14, 15 is directed so that it is normally attached to the pin 13 in the horizontal position of the holder 3. The end is 15 designed to be effective in both directions, i.e. the hook 14 can prevent the slide 12 from approaching the hinge 4 prevent, but in any case prevents the slide 12 from moving away from this joint to beyond a position that the Engagement of the end 15 on the pin 13 corresponds. Actually works the hook 14 like a rigid connection against an increase in the distance between the arm 1 and the axis 4, on the other hand like a

309850/047 1

Fold-away stop in the direction of the approach of the arm 1 to the axis 4.

The joint 6 of the rod 7 on the chassis 5, the bore 10 of the foot 24 in which the rod 7 moves, and the joint 4 of the shark. * ters 3 on the chassis 5 form the tips of a triangle, the sides of which between the joint 4 and the bore 10 on the one hand and the Joint 6 and the bore 10 on the other hand have variable lengths and positions, while the one between the joints 4 and 6 short side is fixed. Geometrically speaking, the side lying between the joint 6 and the bore 10 runs through a side smallest length if bore 10 and joints 4 and 6 in lying in a line - mechanically speaking, the elastic one works Rod 7 under pressure, which always pushes the foot 24 upwards and always strives to lift the holder 3 upwards, at least if the points 4, 6, 10 are not in a line, which is excluded by the construction of the strand carrier. Man recognizes that the springs 9 and 20 are not just one of the arm 2 of the Axis 4 exert pushing away force when you fold back the holder 3, but also counter to the folding back of the holder 3 downwards work «. I r »sequence of the relative positions of points 4, 6 and 10 takes in the course of folding back the holder 3 downwards however, the force component pushing the holder 3 upward continuously to the extent that the holder 3 descends. In the limit, this component would be zero, namely if the three points 4, 6 and 10 would be in a line. On the other hand, it is timed when the holder is folded back 3, the moment exerted by the weight of the various elements and the string 18 progressively increases, and the relative ones Positions of the joints 4 and 6 and the spring forces of the springs 2O and 9 are determined so that the holder 3 has an unstable equilibrium weight

position passes through shortly before it is shown in Figures 7, 8, 11 horizontal position reached * As a result, the holder 3 is always in its horizontal position due to the weight pressed and there is no risk of it being pulled by the thread 17 is raised in the course of unwinding.

The spring 9 presses practically continuously against the foot 24 »during the Spring 20 comes into contact with him as soon as the holder 3 is vertical stands and at the moment when the strand carrier in a strand horizontal position. The spring 20 only no longer touches the foot 24 when the holder 3 is in the horizontal position and the Fadenstrahg is completely unwound or during the unwinding of the last winding of the same.

To use the strand carrier of Figures 6, 7 and 8 one lifts the holder 3 and lays the strand 18 on the arm 2. Of course At the same time, the strand wraps itself around the arm 1. The holder 3 remains stable in the vertical position because it strikes against a stop 19 and is held by the elastic rod 7. It also bears the weight of arms 1 and 2 and of the strand 18 to hold the holder 3 in this vertical position. One must therefore exert a pressure by hand in order to to put him back in the horizontal position, where he for the reasons given above after exceeding his unstable equilibrium position remains pressed against the chassis 5. In the course of folding down the holder 3, the spring 20 is compressed and sets the strand 18 under tensile stress from the start of the folding back. The strand is therefore ready for unwinding, which is done by pulling off the thread 17 upwards (FIG. 7). At the end of The arms 1 and 2 move away under the action of the unwinding

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Spring 20 and especially the spring 9 from each other, which during the Unwinding the last turns of the strand is effective to maintain a suitable tension tan the same.

The one in the figures. 6 and 8 has a small disadvantage at the beginning of the folding back of the holder 3, during the time _r when the arm 1 is not yet in contact with the strand . This disadvantage is eliminated by the additional device described below and shown in FIGS. 9 to 11. .

In this embodiment of the strand carrier it is provided that the arm 1 is held displaceably on a slide 12, similar to the slide 11 on the holder 3. Me displacement of the slide 12 is in the now. described manner controlled by the hook 14, 15t 16 and the pin 13 * When the holder is in a horizontal position and the unwinding of the strand is finished, the end 15 of the hook engages over the pin 13. ^ fenn the holder 3 is now lifted In order to bring the arms 1 and 2 into a horizontal position, the end 15 remains in engagement on the pin 13 (Pig · 9) · The arm 2 is now approached to the axis 4 so that the two arms 1 and 2 are so far apart are approximated as possible. One can now easily lay the strand 18, which simply rests on the arm 2, while it has practically no contact with the arm 1. Before the holder 3 is folded back, the hook 14 is raised so that its end 15 is released from the pin 13. At this moment, the arm 1 and its slide 12 move under the effect of their own weight downwards, so that the arm 1 comes into contact with the strand 18 and tensions it slightly, so that any displacement

309850/047 1

thereof is prevented on the arms 1 and 2 in the folding of the holder 3 * The slight tension of the strand allows the _/ other, to place it properly on the arms, especially the edges of the strand velche as a result of the preceding treatments for bending inwards incline · In the course of the last folding back movement (Fig. 11), the arm 2 moves away from the joint 4 and pulls on the cord 18, which in turn pulls on the arm 1, which takes the slide 12 and the hook 14 with it, the end 15 of which over the Pin 13 falls. The arm 1 is thus fixed immovably, and the tension can act with the desired force, so that the same result as above is obtained, but prevents any disorder of the strand as a result of its displacement along the arms 1 and 2 ve.

The invention is not limited to the exemplary embodiments described and shown limited, but you can also get the same result with other embodiments. What is special about In the examples shown above, the stop 8 is provided between the bore 10n and the hinge axis 6, while the springs 20 and 9 to work under pressure. You can stop 8 beyond the Arrange hole 10, in which case the springs 20 and 9 work under tension. Furthermore, in the example shown is the movable one Arm 2 is the one furthest away from joint 4 * However, arm 1 which is closest to joint 4 can also be used is, train movable by the rod 4 by another Replaced rod, which causes a similar connection.

30 9S5Q / QU1

Claims (10)

Claims Strand carrier for unwinding a thread strand upwards in the direction of the axis of the strand, which is stretched between two substantially parallel arms which rotate about their axes and are cantilevered on a holder which is substantially perpendicular to them and which on a chassis between a perpendicular Position for placing the strand and a horizontal position for unwinding is pivotable, the holder is in the unwinding position under the arms, in the vertical position of the holder at least one of the arms, which is held on a slide on the holder, is the other Arm approaches in order to facilitate the laying of the strand, and at the beginning of the retraction of the holder downwards and in its horizontal position away from the other arm in order to keep the strand taut for the entire duration of the unwinding, characterized in that a.) the arm furthest away from the joint (4) of the holder (3) (2) when the holder is swiveled up, it approaches the other arm (1) by its own weight, while that of the joint (4) of the holder nearest arm (1) can temporarily move away from the other arm (2) in the vertical position of the holder, to the To apply a low tensile stress to strand (18), and returns to its normal position when the holder is folded back, when the other arm {2) is under considerable tension ausuTbtj b) the two furthest apart in the line of the two arms - (1 ,, ^) with each other a j course of the trieiaes changeable * Jmke% Ibilden, who see from the falter Jaer -ge- -fly-JH see increasingly opens and one according to the nature of the treated Thread strand has different initial value c) the second arm (2) the thread strand (18) with a very different one elastic tensile stress applied, so that at the end of the development the shift outwards is considerable and the tensile stress is low; d) an elastic device (9, 20) contributes to the holder (3) to hold in the horizontal position during unwinding. 2. strand carrier according to claim 1, characterized in that an automatic locking of the holder (3) in, the horizontal Position is provided. 3 «strand carrier according to claim 2, characterized in that as an automatic Locking the holder in the horizontal position, an elastic device (7 to 9, 20, 24) is used, which the Holder pushes upwards with a force that continuously decreases in the amount of the folding back downwards, while it is in the direction of the lowering of the holder acting moment, which results from the weight of the holder, the arms and the strand, with the approach of the Halters to the horizontal increases, and shortly before softening this horizontal position is the position of unstable equilibrium. 4. strand carrier according to claim 3, characterized in that the slide (11) of the joint (4) of the holder (3) furthest away Arm (2) with the chassis (5) by an elastic articulated rod (7) of variable length, which always strives to to extend, is connected so that the hinge points (6, 10) of the toggle rod (?) on the chassis (5) and slide (11, 24) on the one hand and the hinge point (4) of the holder on the chassis on the other 309850 / 047T the tips of a triangle with two mutable sides and one short fixed side, whereby the joint rod (7) formed side goes through a smallest length when the three Tips lie in a line, and the elastic rod (7) presses the holder (3) upwards with a force which is variable and as it approximates the alignment of the three peaks of the triangle in a line decreases, while the holder (3) the Anne (1, 2) and her loads due to the heavy weight with a changeable, as the holder is pivoted downwards and the force grows, the more you pull yourself down approaching the alignment of the three points of the triangle in a line, the effect of gravity just before reaching the horizontal position of the holder (3) is greater than the opposite Lifting force of the elastic rod (7) is " 5. strand carrier according to claim 4 »characterized in that the elastic joint rod (7) consists of a rod which is articulated on the chassis (5) and _{slides freely in a bore (10) of the slide (it) r} and one concentric to the rod , carries spiral spring (9, 20) working under pressure, which is supported on the one hand at the start of the opening (10) and on the other hand on a lockable stop (8) which can be displaced on the rod. 6. strand carrier according to claim 5, characterized in that the Displacement of the slide (12) of the hinge point (4) of the holder (3) closest arm (1) in the direction of the other arm (2) is limited by a stop (13 to 16) on which the slide is lockable. 7. strand carrier according to claim 6, characterized in that the Displacement of the slide (12) of the hinge point (4) of the holder 309850/0471 (3) nearest arm (1) through a hook (14 «15)» with a pin (13) on the holder (3) cooperates, is controllable. 8. strand carrier according to one of claims 1 to 7 »characterized in that that the axes of the arms (T, 2) diverge. 9 * strand carrier according to one of claims 1 to 7 »characterized in that the axes of the arms (1, 2) converge. 10. strand carrier according to one of claims 1 to 7 _S, characterized in that the arms (1 _r 2% frustoconical with their large base ■ are formed on the side of the holder 11 · Cord carrier according to one of Claims 8 to 10, characterized in that the axes of the arms (1 ₉ 2) are elastically flexible under the effect of the tensile stress of the cord (18). 12 * strand carrier according to one of claims 4 to 11, characterized in that the arm (2) furthest away from the hinge axis (4) of the holder (3) from the other arm (1) by the springs ( _9S 20) of the elastic Articulated rod (7) is elastically pushed away, the elastic force acting very differently, since two springs are arranged with an overlapping effect, namely a spring (20) with high spring force and low spring travel, which ensures the tension of the strand at the beginning of unwinding , and a spring (S) with low spring force and large spring deflection, which ensures the tension of the last windings of the strand at the end of unwinding.