JP6158901B2 - Partial warping sampling machine - Google Patents

Description

  The present application relates to a partial warping drum and a plurality of transports arranged on an outer periphery of the partial warping drum, which is movable from one axial end of the partial warping drum to the other axial end of the partial warping drum. A partial warping sampler having a surface and a thread guide assembly having at least one thread guide, wherein the thread guide and the partial warping drum are rotatable relative to each other about an axis.

  A partial warp sampling machine of this type is known, for example, from European publication 1930489.

  Partial warping sampling machines are used in the textile industry to produce warp for samples or for commercial use. In order to generate this type of warping, individual yarns are drawn from a spool and wound on the outer circumference of a partial warping drum at one axial end. Here the yarn is placed on a conveying surface which moves away from the individual ends to make room for further yarn to be wound. For winding, the yarn guide is moved around the outer circumference of the partial warping drum, or the yarn guide is held stationary so that the partial warping drum can rotate.

  The yarn in contact with the conveying surface is under a certain degree of tension. This tension leads to a radial force acting on the conveying surface and is very strong, and with the proper efforts the conveying surface can no longer move or is damaged when a significant driving force is applied . As soon as such an event occurs, production must be interrupted and complex maintenance tasks must be performed.

  The present invention is based on the object of providing a partially warped sampling machine that exhibits high productivity.

  This object is achieved with a partially warped sampling machine of the type mentioned at the outset, wherein at least one conveying surface can be displaced axially.

When the conveying surface is displaced in the direction toward the shaft, the circumferential length of the partial warping drum on which the yarn is wound is corrected. This circumferential length is reduced and the yarn is somewhat loosened, the force acting on the yarn is reduced or at least producing a reduced force acting on the conveying surface. The displacement of the transport surface need not be very large. In many cases, displacement movements of 1 mm or less are appropriate because the forces acting on the conveying surface are sufficiently reduced. The displacement of the conveying surface is carried out during operation, i.e. during the winding operation once the yarn has already been wound up.
Therefore, the circumferential length of the partial warping drum determined by the radial position of the individual conveying surfaces is suitable for the conditions used during operation.

  Here, it is preferable that a force acting in a direction away from the shaft acts on the transport surface. In this way, the displacement of the at least one transport surface is automated, that is to say adjusted in an automatic manner. When the force acting on the carrying surface exceeds the force acting in the direction away from the axial direction, caused by the tension, the point acting away from the shaft balances the force generated by the yarn tension. Displace until The force acting away from the shaft is such that the movement of the conveying surface is possible in the desired manner during this balanced state.

  The force is preferably exerted radially on the axis. The displacement movement of the conveying surface is carried out in a radial direction with respect to the axis. Due to the displacement movement, there is thus only a “diameter reduction” of the partial warping drum or a more precise contact position of the position of the partial warping drum, but there is no further modification of the winding geometry caused.

  The displacement of the conveying surface in the direction away from the axis is preferably limited. Therefore, even if the force away from the shaft reaches a certain magnitude, the predetermined position can be determined before the winding operation. Limiting the displacement means that all the conveying surfaces have a predetermined and defined position at the start of the winding operation.

  The plurality of transport surfaces are displaceable in a direction towards the axis, and preferably at least one non-displaceable transport surface is arranged between the two displaceable transport surfaces. In particular, when one displaceable carrying surface is arranged between two displaceable carrying surfaces, i.e. when displaceable carrying surfaces and non-displaceable carrying surfaces are arranged alternately, the yarn There is an advantage that the yarn wound in the circumferential direction does not move due to the displacement movement in the direction toward the axis of the conveying surface so that the tension generated in the belt is reduced. This method produces a high quality warp.

  Preferably, the force generator assembly acts on the conveying surface. The force generator assembly generates a force that acts in a direction away from the axis.

  Here, the force generator assembly preferably has a plurality of force generators distributed in a direction parallel to the axis. These force generators operate independently of each other, the former causing displacement of the conveying surface where the force generated by the yarn tension acts on the conveying surface.

  The force generator assembly preferably has at least one pressure cylinder. Fluid is supplied to the pressure cylinder so that force is generated. The pressure cylinder is configured as a cylinder that unilaterally applies pressure.

  The pressure cylinder is preferably configured as a pneumatic cylinder. The pneumatic cylinder is supplied with a gaseous pressure medium, for example, pressurized air. The gaseous pressure medium is compressible. The force generated by the pneumatic cylinder and acting away from the axis depends on the force acting on the pneumatic cylinder.

  The pneumatic cylinder is preferably connected to a constant pressure source. This source is, for example, a pressure air network, for example having an operating pressure of 6 bar. In many cases, pressures in this range are readily available.

  Alternatively or additionally, the force generator assembly has a spring assembly. One or more springs are deployed in the spring assembly. This or these springs are compressed when the force generated by the tension of the yarn exceeds the force generated by the spring. Once the spring is compressed, this force increases and an automatic control process occurs again.

  The transport surface is in contact with the support surface, and the support surface can be displaced in a direction toward the axis. When the support surface is displaced in the direction towards the axis, the transport surface is also displaced because the transport surface is driven to the support surface because of the thread being wound. In operation, the conveying surface is guided across the support surface with a certain level of friction. When the support surface is displaced in the direction toward the axis, the force generated by the yarn tension is reduced and the friction between the conveying surface and the support surface is reduced.

  The conveying surface is preferably configured as a conveying belt that rotates around the support profile. This is a relatively simple construction of the transport surface.

  The support surface is preferably displaceable on the support profile. Alternatively, the support profile can also be displaced. As mentioned above, a “shrinkage” of the winding path that causes a reduction in the tension of the wound yarn is achieved by both means.

The invention will now be described in conjunction with the following preferred exemplary embodiments and drawings.
FIG. 1 shows a schematic perspective view of a partially warped sampling machine. FIG. 2 shows the longitudinal section through the transport surface assembly. FIG. 3 shows the detail III from FIG. FIG. 4 shows a top view of the transport surface assembly with respect to FIG. FIG. 5 shows a perspective view of the transport surface assembly.

  The partial warping sampling machine 1 has a partial warping drum 2 connected to a winding drive 3 shown schematically. The winding drive unit 3 can rotate the partial warping drum 2 in the direction of the arrow 4 during the winding operation.

  A number of supply packages are provided on the package spool (not shown in more detail). In the present exemplary embodiment, up to 128 supply packages are deployed in the spool.

  A single thread is withdrawn from each supply package and directed through a thread guide eyelet 5 in the thread guide 6. All the thread guides 6 are combined to form a thread guide assembly 7.

  The yarn guide 6 moves so that the yarn guided by the yarn guide small hole 5 and the yarn guide 6 is guided in the axial direction across the outer periphery of the partial warping drum 2. The yarn guided by the yarn guide hole 5 is placed on the conveyor belts 8a, 8b forming the conveying surface 8. The conveying surface moves in parallel with the axis of the partial warping drum 2 and moves away from the end side where the yarn guide 6 is disposed. If the yarn is not placed on the outer periphery of the partial warping drum 2, the individual yarn guide eyelets 5 are moved in front of the end side of the partial warping drum 2. Yarn that is not needed to produce warp is wound up on a central ribbon (not shown).

  A cross rod 9 arranged between the conveyor belts 8a, 8b is applied in order to form a so-called wreath or sizing separator. Each cross rod 9 has a tip 10 that faces substantially outward in the radial direction at its end opposite the yarn guide assembly 7. Here, the tip 10 is arranged so as not to move on the cross rod 9.

  For the purpose of clarity, the thread guide eyelets 5 are all shown as being in front of the end side of the partial warping drum 2. However, the movement of the yarn guide 6 which moves the yarn guide hole 5 in the axial direction of the partial warping drum, more precisely, the conveyor belt 8, guides the yarn around the outer circumference of the partial warping drum 2. Clearly it is necessary to be done.

An embodiment of a partial warping sampling machine in which the partial warping drum 2 rotates is shown in FIG.
However, the present invention is equally applicable to a partial warp sampling machine in which the partial warp drum 2 is fixed and the yarn guide assembly 7 rotates with respect to the partial warp drum 2 when the warp is wound.

In both cases, there is an axis X about which the partial warping drum 2 or the yarn guide assembly 7 rotates.
In each case, the conveyor belts 8a, 8b are components of the yarn transport unit as shown in FIGS.

The yarn carrying unit has a support profile 12 which is fixed to the outer circumference of the partial warping drum 2 by means of a plurality of base supports 13.
The support profile 12 has a support surface 14 by which the force generator assembly 15 is supported on the base wall 16.

FIG. 3 shows two possible embodiments of the force generator 17 of the force generator assembly 15. The individual force generators 17 are used selectively or together.
A first embodiment of the force generator 17 is a pressure cylinder 18 that can be configured as a unilaterally acting pressure cylinder. The pressure cylinder 18 is preferably a pneumatic cylinder, and its working chamber 19 is connected to a constant pressure source 20. The pressure source 20 is a network of factory pressure air, for example, and air with a constant pressure of 6 bar is used.

  The pressure cylinder 18 has a piston 21 that moves maximum to the upper end wall 22 of the pressure cylinder 18. The top wall 22 thus forms a restriction of movement. The upper end wall 22 restricts the displacement movement of the support surface 14 where the support surface 14 is separated from the axis X, and thus restricts the corresponding displacement movement of the conveyor belt 8a in contact with the support surface 14.

  An alternative embodiment of the force generator 17 is formed by the spring assembly 23. The spring assembly 23 includes one spring 24 or a plurality of springs. In the relaxed state, the spring 24 has a predetermined length, and the maximum displacement of the conveyor belt 8a that is separated from the outer periphery of the partial warping drum 2 by the predetermined length is determined simultaneously.

As can be seen from FIGS. 2 and 4, the corresponding force generators 17 are arranged to be distributed across the longitudinal direction of the yarn carrying fixture 11.
In other words, one end of the conveyor belt 8 is guided to the yarn carrying installation portion 11 by the tension roller 25, and the other end is guided by the drive wheel 26. The drive wheel 26 is driven by a drive unit 27 so that the conveyor belt 8a forms a conveying surface 8 here, together with its upper leader, on the side of the partial warping drum 2 on which the yarn guide assembly 7 is arranged. Move away from.

The force generator 17 has a direction of force that is directed radially relative to the axis X of the partial warping drum or the axis X of the yarn winding.
In one alternative embodiment (not shown in more detail), the entire support profile 12 can also be supported on the outer circumference of the partial warping drum 2 by individual force generators 17.

  As seen in FIG. 1, the plurality of conveyor belts 8 a and 8 b are arranged on the outer periphery of the partial warping drum 2. Only every other conveyor belt 8a can be displaced in the direction towards the axis of the partial warping drum 2. Thus, one conveyor belt 8b that remains fixed in the radial direction is arranged between two displaceable conveyor belts 8a. As explained below, for this reason, when the displaceable conveyor belt 8a is displaced radially inward, movement of the yarn wound on the conveyor belts 8a, 8b in the outer circumferential direction is avoided.

  During the generation of the sample warp, the yarn is wound on the outer circumference of the partial warping drum 2 with the help of the yarn guide assembly 7, where it is placed on the conveyor belts 8a, 8b. Once a so-called “tape”, ie a predetermined number of yarns wound at the same time, is completed, the conveyor belts 8a, 8b are connected to the radially outward leader, ie the conveying surface 8, at the end on which the yarn guide assembly 7 is placed. Moved away from the club side.

  However, the yarn in contact with the conveyor belts 8a, 8b receives a certain level of tension. This tension produces a force that is directed radially inward. This force urges each conveyor belt 8a, 8b, more precisely the upper leader of the conveyor belt 8, ie the conveying surface, to the support surface 14. For this reason, frictional forces are generated that increase with tension and the number of yarns that are wound up. This frictional force is so great that the drive unit 27 can no longer move the conveyor belts 8a, 8b.

  Friction is reduced by the force generator assembly 15 automatically and in an automatically controlled manner. Once the force resulting from the tension of the wound yarn exceeds the force of the force generator 17, the displaceable conveyor belt 8a with the support surface 14 is displaced radially inward, i.e. of the partial warping drum 2. Displace towards the axis. For this reason, the radius of the polygon defined by the conveyor belts 8a, 8b is somewhat reduced and at the same time the circumference of this polygon is also reduced. The wound yarn is thus somewhat relaxed. Yarn tension is low. Accordingly, this reduces the force acting on the conveyor belts 8a, 8b, and thus reduces the friction between the conveyor belts 8a, 8b and the support surface 14. When the further yarn is wound up, the force increases again, and when the force again exceeds the force of the force generator 17, the support surface 14 with the displaceable conveyor belt 8a is again displaced radially inward. , The yarn is relaxed again.

  However, the displacement movement of the conveyor belt 8a is very small here. Such displacement movement is 1 mm or less than 1 mm. The packaging configuration formed by the wound yarn is not compromised for this reason.

  Since not every conveyor belt 8a, 8b but preferably only every other conveyor belt 8a can be displaced in the radial direction, the assignment of the conveyor belts 8a, 8b in the outer circumferential direction is such that the conveyor belts that can be displaced in the radial direction. The movement of the yarn in contact with the conveyor belts 8a and 8b in the outer peripheral direction is not humidified as in the case of the radial displacement. Therefore, the yarn wound up in the outer peripheral direction does not move with respect to the conveyor belts 8a and 8b.

Claims (15)

Partial warping drum (2) and one end in the axial direction of the partial warping drum (2) to the other end of the partial warping drum (2) disposed on the outer periphery of the partial warping drum (2) A plurality of conveying surfaces (8) movable in a direction and a yarn guide assembly (7) having at least one yarn guide (6), wherein the yarn guide (6) and the partial warping drum (2); Are partially warped sampling machines (1) that are rotatable relative to each other about an axis (X),
Partial warping sampling machine (1), wherein at least one of said transport surfaces (8) is displaceable in a direction towards axis (X).   The partial warp sampling machine (1) according to claim 1, wherein a force acting in a direction away from the axis (X) is exerted on the transport surface (8).   The partial warp sampling machine (1) according to claim 2, wherein the force acts to be radial with respect to the axis (X).   The partial warp sampling machine (1) according to any one of claims 1 to 3, wherein the displacement of the conveying surface (8) in a direction away from the axis (X) is limited.   5. The system according to claim 1, wherein the plurality of transport surfaces are displaceable towards the axis (X) and at least one non-displaceable transport surface is arranged between two displaceable transport surfaces. Partial warping sampling machine (1).   The partial warp sampling machine (1) according to any of the preceding claims, wherein a force generator assembly (15) acts on the conveying surface (8).   The partial warp sampling machine (1) according to claim 6, wherein the force generator assembly (15) comprises a plurality of force generators (17) distributed in a direction parallel to the axis (X).   The partial warp sampling machine (1) according to claim 6 or 7, wherein the force generator assembly (15) comprises at least one pressure cylinder (18).   The partial warp sampling machine (1) according to claim 8, wherein the pressure cylinder (18) is configured as a pneumatic cylinder.   The partial warp sampling machine (1) according to claim 9, wherein the pneumatic cylinder is connected to a constant pressure source (20).   The partial warp sampling machine (1) according to any of claims 6 to 10, wherein the force generator assembly (15) comprises a spring assembly (23).   12. Partial warping sampling according to any of the preceding claims, wherein the transport surface (8) is in contact with a support surface (14), the support surface (14) being displaceable towards an axis (X). Machine (1).   13. The partial warp sampling machine (1) according to claim 12, wherein the conveying surface (8) is configured as a conveyor belt (8a) rotating around a support profile (12).   The partial warp sampling machine (1) according to claim 13, wherein the support surface (14) is displaceable on the support profile (12). 14. The partial warp sampling machine (1) according to claim 13 , wherein the support profile (12) is displaceable.

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