JPH0362809B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION According to German Patent No. 1 192 779, a frictional false-twisting device is known according to the generic concept of claim 1, in which each friction surface is It has one pulley. Just 1
A book drive belt is wrapped around a main warb at its ends, and the main warb is wrapped around one main warb at each end.
It has two upper and lower drive pulleys. This drive belt is then wrapped around a pulley associated with the friction surface, by means of which it moves from the upper circulation plane defined by the upper drive pulley to the downward direction defined by the lower drive pulley. is diverted to the circulation plane. The disadvantage of this drive type is that the false-twisting device has to be configured differently in order to obtain S and Z twists, and the drive belt There is no guarantee that sufficient tension can be generated and maintained.

The same issue was addressed in the Federal Republic of Germany Patent Application Publication No.
This also occurs in the known friction false twisting device according to No. 2928522. This device consists of two endlessly circulating friction belts between which a thread is clamped.
Even in this case, it is effective to make one roller of each roller pair belong to a pulley. No effective belt guidance is disclosed in this known example, which ensures a changeover from S to Z twist without changing the yarn running trajectory and an adjustment of the crossing angle while maintaining sufficient belt tension.

The configuration of the present invention that solves the above problem is as described in claim 1.

The construction of the invention differs from the prior art in that the main weave and the drive pulley are fixedly connected to each other and are independently supported on the tension pulley; and a tensioning pulley bearing are movably guided relative to the main frame of the friction false twisting device approximately perpendicular to the thread running path and are fixed in position in at least two adjustment positions. It lies in what is possible. With this configuration, on the one hand, even if the relative positions of both friction surfaces change, sufficient tension of the drive belt can be obtained, and when switching from S twist to Z twist, the thread running trajectory can be adjusted. The main warb can be placed on the other side of the tangential belt without significantly changing the tangential belt. A further advantage of the invention is that the main warb can be pulled away from the tangential belt in a simple manner for temporary stopping of the friction false-twisting device, without changing the position of the false-twisting device.

In an advantageous embodiment of the invention, the bearing housing for the main turret and the drive pulley preferably rests elastically on a stop that can be moved and fixed in at least two end positions. As a result, the main warb is in frictional contact with the tangential belt at one end position and is pulled away from the tangential belt by a positive engagement at the other end position. This configuration can also be reversed and is advantageous with respect to the tension and elasticity of the tangential belt.

In order to bring the main weave into contact with the tangential belt with the same spring force during S and Z twisting, the support points of the springs acting on the bearings of the main weave are placed on the main frame of the friction false twisting device in two end positions. Can be fixed in position.

Robust and space-saving construction1
In an embodiment, the bearing casing for the main warb and the drive pulley is mounted on the free end of a parallel spring, the other end of which is attached to the main frame of the friction false-twisting device, also advantageously at two locations. It is possible to tighten the This parallel spring consists of two mutually parallel leaf springs, the ends of which are tensioned relative to each other, so that the ends cannot undergo relative movement in the longitudinal direction. As a result, when the free end moves, it always moves parallel to itself.

The tensioned ends of the parallel springs are fixed in position so that when the main warb contacts the tangential belt in S twist and Z twist, the other ends of the parallel springs move by the same amount. As a result, the crimping force and the transmission force are at least approximately the same.

In one embodiment of the invention, the bearing housing of the tension pulley, which is designed as a deflection pulley, is movable freely towards the yarn running track against the force of a force generator, in particular a spring. Therefore, there is no need to specially adjust the position of the bearing casing for the direction change pulley when switching from S twist to Z twist or when adjusting the crossing angle. By the force of a force generator or a spring, this tensioning pulley assumes a position corresponding to the length of the drive belt and creates a sufficient tension of the drive belt. The force generator or spring preferably has a constant force-spring travel curve. This spring is also advantageously designed as a parallel spring, in which case one end of the parallel spring is fixedly tensioned on the main frame of the friction false-twisting device and the other end supports the bearing housing of the tension pulley. This spring or parallel spring support can also be provided at two locations on the frame of the friction false twisting device in order to provide equal belt tension for S and Z twists, respectively.

In an advantageous embodiment, the bearing casing for the main warp and the drive pulley and the bearing casing for the tensioning pulley are fastened to the ends of one common parallel spring, the central region of which is connected to the friction false-twisting device. It is fastened to the main frame of the machine, sometimes in two places.

As already explained, the invention is advantageously applied to a friction false-twisting device with two mutually moving endless friction belts as well as a friction false-twisting device with two rotating disks. In a first embodiment (two crossed friction belts), each roller of the pair of rollers, each tensioned with a friction belt, is provided with a pulley that connects the upper and lower circulation planes of the drive belt. It is located almost tangentially between the two. In this case, the friction belt is arranged such that the tangential plane of the friction belt is approximately parallel to the running direction of the tangential belt. In embodiments with two rotating discs, the discs are arranged in a plane perpendicular to the tangential belt.

As disclosed in German Patent Application No. 2928522, it is particularly advantageous if in the two embodiments at least one of the friction belts or one of the bendable discs is pressed onto the respective other friction element. Get effective results.

The inventive bearing type of the main warb and tension pulley makes it possible to change the intersection angle of the two friction belts or discs without having to make adjustments for guiding the drive belt and maintaining the belt tension. . Furthermore, even when switching from S twist to Z twist, the yarn traveling trajectory hardly changes.

Next, the present invention will be specifically explained with reference to the illustrated embodiments.

In the drive system schematically shown in FIG. 1, no false-twisting elements are shown. In one embodiment of the invention, this false-twisting element consists of two disks, which are each connected in a rotationally fixed manner to a pulley 50 and 52 and together with the pulleys 50 and 52, not shown. It is supported in a suitable manner and the thread is clamped in a known manner between the friction surface areas.

In a further embodiment of the invention, two endlessly circulating friction belts are formed as false-twisted elements. The two friction belts are each wrapped under tension around a pair of rollers so as to tighten the thread between their tension sides. One roller of each pair of rollers is non-rotatably connected to and supported by pulleys 50, 52. In both types of friction false twisting devices, the angle between the friction surfaces can be adjusted. This also changes the relative positions of pulleys 50 and 52.

The friction false twisting device is driven by a tangential belt 45 which circulates endlessly in the same direction in the longitudinal direction of the machine and runs tangentially to the main warb. This tangential belt 45 drives the main warb 44 by friction. This main warb 44 is rotatably supported by a bearing casing 46 together with a main belt pulley coaxial therewith, in other words, a drive pulley 47. A deflection pulley, in other words a tension pulley 53, is rotatably supported in a bearing casing 54. One end of an endless drive belt 48 is wrapped around the drive pulley 47, and the other end of the drive belt is wrapped around the tension pulley 53.
The tension side and return side of the drive belt 48 are wound around drive wheels, in other words, pulleys 50 and 52. Bearing casing 46 for the main weave bearing as well as bearing casing 54 for the tension pulley 53
is mounted on the main frame of the friction false twisting device so as to be movable in a direction perpendicular to the running direction of the tangential belt 45 and perpendicular to the thread running track. (See double arrow in Figure 1). This makes it possible, on the one hand, to create sufficient tension in the drive belt 48 and on the other hand, on the main warp 44 in contact with the tangential belt 45.
A change in the position of does not cause a change in the thread running trajectory.

The bearing casing 46 for the main weave bearing is pushed towards the tangential belt 45 by the force of the spring 75 and can be pushed away from the tangential belt 45 by a movable stop 76. be. The bearing housing 54 for the tensioning pulley 53 is pressed towards the tangential belt 45 by a spring 77, which is weaker than the spring 75, so that sufficient tensioning of the drive belt 48 occurs. .

As will be explained in detail later, the bearing casing 4
6 can also be moved towards the tangential belt 45 by means of a stop that can be adjusted and fixed in position. In this case, the contact between the tangential belt 45 and the main weave 44 is brought about by this stop, and the separation of the main weave 44 from the tangential belt 45 is brought about by the spring.

Next, Figure 2a, Figure 2b, Figure 3a, Figure 3b
Two embodiments of the invention will be described with reference to FIGS.

The illustrated frictional false twisting device includes a highly rigid disk 1 and an elastic disk 2. As can be seen from FIG. 4, both discs 1 and 2 are rotatably supported on shafts 3 and 4 supported by bearings 5 and 6, and
0,52, and is driven by the drive device described in FIG. The rigid disk 1 is provided with a friction lining, which can be made of, for example, rubber, vulcanizate, wear-resistant metal, plasma coating, ceramic coating, nickel-diamond coating, etc.

The elastic disc 2 can be made of a single material or of a composite material. This material must be able to withstand the tensile forces caused by centrifugal forces and be easily deflectable and expandable. For example 0.5
~2 mm thick rubber discs can be used with cord threads embedded within the rubber layer to provide tensile strength.

This elastic disc 2 is pressed from behind by a crimping device 10 and is thereby bulged out towards the thread 14. As a result, the thread 14 is clamped between the annular friction surfaces of the elastic disc 2 and the rigid disc 1. The crimping device 10 includes a cylinder 9,
It consists of a piston 8 that moves inside it. This piston 8 is brought into contact with the disk 2. The cylinder 9 is provided with a compressed air connection (not shown), by means of which the piston 8 is pressed towards the disk 2.

For more information on this, reference is made to German Patent Application No. 2928522.1.

The thread 14 is passed through a thread guide on the entry side (not shown),
It is fed into the friction false twisting device perpendicularly to the plane containing both axes of the discs 1, 2.

The bearings 5 and 6 are movable and adjustable, and the crimping device 1
0 is stationary. As a result, both disks 1, 2 can be adjusted in movement between the two end positions. The position is adjusted in such a way that the distance between the thread and the axis of the bearing 5 is always equal to the distance between the thread and the bearing 6.

The movement of the two discs 1, 2 is adjusted depending on whether S-twisting or Z-twisting is being performed, or to change the ratio between the degree of twisting and the yarn running speed.

It goes without saying that any intermediate position suitable for effecting the desired false twist can be selected between the two end positions of the two discs.

Figures 2a and 2b and Figures 3a and 3
Figure b shows a side view of the frictional false twisting device shown in cross section in Figure 4, and Figures 2a, 3a, and 4 show the positions of the disks 1 and 2 in S twist, and 2b
Figure 3b shows the position of the discs 1, 2 in a Z twist. The illustrated friction false twisting device has a main frame 38 which, as can be seen in FIG. 4, has a U-shaped cross section. This main frame 3
The crimping device 1 mentioned above is attached to one flange of 8.
0 is supported.

Swinging bodies 40 and 41 are rotatably supported on both flanges of the main frame 38 coaxially with respect to the central axis 39 of the crimping device 10 and fixedly supported by nuts 42 and 43. The same rocking body 40, 41
Bearings 5, 6 for the discs 1, 2 are provided at the ends.

The friction false twisting device is driven by a tangential belt 45 which extends in the longitudinal direction of the machine and always circulates in the same direction at a constant speed. In contact with the tangential belt 45 is a main warb 44 of the friction false twisting device, which is connected to the bearing casing 46.
It is rotatably supported on a weave frame with a drive pulley 47 at its shaft end. An endless drive belt 48 is wound around the drive pulley 47 at a winding angle of approximately 180°, and the tension side 49 of the drive belt 48 is connected to the pulley 5 of the disc 2.
0, and the slack side 51 is wrapped around the pulleys 52 of the disc 1 at a winding angle of approximately 180°, and then around the freely rotatable tension pulley 53 at a winding angle of approximately 180°. It is closed forever. Bearing casing 54 is movable in the tension direction indicated by arrow 56. The bearing casing 54 is tensioned by a compression spring 55 in the embodiment shown in FIGS. 3a and 3b and by a lower end 79 of a parallel spring 78 in the embodiment shown in FIGS. 2a and 2b. being pushed in the direction. The compression spring 55 is supported by the main frame 38 via a pin 57. parallel spring 78
The support is provided at points 80 and 81.

The bearing casing 46 of the main weave frame is supported on the upper free end of the parallel spring 62 or 78. The parallel spring 62 shown in FIG.
8 can be attached to two locations 60 and 61 on the guide plate 59 of the main frame 38. In the embodiment shown in FIGS. 2a and 2b, the upper end of the parallel spring 78 is fixed at one location. The parallel spring consists of two mutually parallel spring plates 63, the ends of which are fixedly connected to each other, so that when the spring plates 63 are deflected, their ends can only move parallel to each other. Can not. In the operating position, the main warb 44 is brought into contact with the tangential belt 45 by the force of a deflected parallel spring, and on the other hand, in the embodiment of FIGS. 2a and 2b, the tension pulley 53
Automatic adjustment of the position of the drive belt and tension maintenance of the drive belt is provided by the lower end 79 of the parallel spring 78. A lever 64 serves to pull the main warb 44 away from the tangential belt 45. This lever 64 is connected to a pivot center 65 provided on the main frame 38.
It is supported so that it can pivot around the center. The lever 64 is provided with a pin 66.
can slide along the sliding member 67 and be locked within the locking groove 68. In the position shown in FIGS. 2a and 3a, the main warb 44 is pressed against the tangential belt 45 by the force of the parallel springs 62, 78. When the pin 66 is engaged within the locking groove 68, the main worm 44
is pulled away from the tangential belt 45.

For the Z-twist operating conditions shown in FIGS. 2b and 3b, and for the mounting position of the connecting piece 58 shown in FIG.
In the embodiment shown in FIGS. 2a and 2b, the sliding elements 67, 69 are components of a rectangular slide 82 fixed to the main weave frame. It is formed as.
In the Z twist shown in FIG. 3b, the tangential belt 45
In order to pull the main warb 44 away from the ground, in other words to stop the friction false twisting device, a pin 66 is inserted into the bore of the lever 64, which cooperates with the sliding member 69, so that the pin 66 is engaged with the locking groove 70. In order to keep the tension of the drive belt constant, when switching the mounting position of the main weave frame from point 60 to point 61 or vice versa, the pin 57 is pulled out from the hole 71 provided in the main frame 38 and the hole 7 is removed.
The support point of the compression spring 55 can be moved by inserting the pin 57 into the spring 2 or vice versa.

If this compression spring 55 is given a very flat characteristic curve, the force generated by it is independent of the spring stroke within the limits predetermined by the operation.

The functions of the friction false twisting device shown in FIGS. 2a, 2b, 3a, 3b and 4 are as follows.

In the position shown in Figures 2a and 3a, the yarn is S-twisted. In that case, the twisting point, in other words defined by the crimping device 10, is used to tie the yarn to both discs 1, 2.
The point of frictional contact between them can be kept stationary, but by changing the mutual angle of the rocking bodies 40, 41, the movement can be adjusted relative to the disk.
For this purpose, the main frame 38 can be provided with angle brackets, not shown. S
To switch from twisting to Z-twisting, disk 2 is positioned to the right of the yarn and disk 1 to the left of the yarn, as shown in FIGS. 2b and 3b. At the same time, the main warb 44 is brought from a position on the left side of the tangential belt 45 as shown in FIG. 3a to a position on the right side of the tangential belt 45 as shown in FIGS. 2b and 3b. Also in this case, the tangential belt 4
5's running direction cannot be changed. Because of this repositioning of the main warb 44, in the embodiment shown in FIGS. 3a and 3b, the connecting piece 58 is moved from point 66 to point 6.
Can be replaced with 1. In the embodiment shown in Figures 2a and 2b, the parallel spring 78 is supported such that the amount of deflection of the parallel spring is the same in both operating positions (S twist, Z twist). Furthermore, the pin 66 of the lever 64 is used to separate the main warb 44 from the tangential belt 45 and stop the operation of the friction false twister.
from one hole into the hole which cooperates with the sliding member 67 and the locking groove 68 in the embodiment shown in FIGS. 2a and 2b, and into the sliding member 69 in the embodiment shown in FIGS. 3a and 3b. and is replaced into the hole that cooperates with the locking groove 70.

By changing the position of the main warb 44, the circulation direction of the drive belt 48 is changed from the direction shown by the arrow 73 to the direction shown by the arrow 7.
4, and the rotation directions of the disks 1 and 2 are also reversed. In order to maintain tension in the drive belt 48, in the embodiment shown in FIGS. 3a and 3b, the pin 57 of the compression spring 55 is replaced from the hole 71 into the hole 72, as shown in FIGS. 2a and 2b. In the exemplary embodiment, the lower end 79 of the parallel spring 78 is moved from the support point 80 to the support point 81, so that the deflection of the parallel spring remains at least approximately the same.

The embodiment shown in FIG.
This is the same as the embodiment shown in FIGS. 2b and 2b. Therefore, a description of the drive system will be omitted here. Since the switching type related to the drive system from S-twist to Z-twist is also the same, this explanation will be omitted here. Fifth
The illustrated embodiment differs from the embodiment of FIGS. 2a and 2b in the special shape of the false-twisting element. In the embodiment shown in FIG. 5, this false twisting member consists of endlessly circulating friction belts 83, 84,
3 and 84 tighten the thread 14 between their tension sides. A crimping device, not shown here, is advantageously provided. Regarding this crimping device, reference is made to German Patent Application No. 2928522.1 (Bag, 1133). Both friction belts 83, 84 are tensioned by pairs of rollers 85, 86, 87, 88, respectively. Rollers 85 and 87 of each pair of rollers are driven as described above by drive belt 48 via pulleys 50 and 52, respectively, which are coaxial therewith. Each pair of rollers is supported on a holder 89, 90 with a T-shaped cross section. The holders 89 and 90 are rotatable about mutually coaxial pivot shafts 91 and 92, and can be fixed at arbitrary angular positions. By this,
On the one hand, the ratio between twisting degree and yarn running speed is adjusted,
On the other hand, it is possible to switch from S twist to Z twist.

A special advantage of the frictional false twisting device of this embodiment is that the required angular adjustment of the holders 89, 90 when switching from S to Z twisting or vice versa;
As a result, the pulleys 50, 52
Despite the positional and angular changes, only small changes are required in the drive train. In particular, a very expensive replacement of the drive belt 48 is avoided.

[Brief explanation of drawings]

Fig. 1 is an explanatory schematic perspective view of the drive device used in the friction false twisting device of the present invention, Fig. 2a is a side view showing the first embodiment of the present invention in use with S twist, and Fig. 2b Figure 3a is a side view showing the first embodiment of the present invention used in Z twist, Figure 3a is a side view showing the second embodiment of the present invention in S twist, and Figure 3b is a side view showing the second embodiment of the present invention used in S twist.
The figure is a side view showing the second embodiment in a Z-twisted state, FIG. 4 is a top view with part of FIG. 3a omitted, and FIG. 5 is a portion of the third embodiment of the present invention. FIG. 1, 2... Disc, 3, 4... Shaft, 5, 6... Bearing, 8... Piston, 9... Cylinder, 10...
Crimping device, 14... Thread, 38... Main frame, 3
9... Rotation axis line, 40, 41... Rocking body, 42,
43... Nut, 44... Main worm, 45... Tangential belt, 46... Bearing casing, 47...
...Drive pulley, 48...Drive belt, 50, 52
... Pulley, 53 ... Tension pulley, 54 ... Bearing casing, 55 ... Compression spring, 60, 61 ...
End position, 62... Parallel spring, 75... Spring, 7
6... Stopper, 77... Spring, 78... Parallel spring, 83, 84... Friction belt, 85, 86, 8
7, 88...roller, 89,90...holding body, 9
1,92...Swivel axis.

Claims (1)

[Scope of Claims] 1. A friction false twisting device for texturing synthetic yarn, comprising: (1.1) two endlessly circulating friction surfaces having a tightening plane substantially tangential to the friction surfaces; (1.2) Both friction surfaces are connected to one pulley 5.
(1.3) The friction false-twisting device has a main warb 44 which circulates endlessly in the longitudinal direction of the machine for driving the friction false-twisting device. (1.4) a drive pulley 47 rotated by the main weave 44 and a tensioning The pulley 53 is supported in two planes of rotation approximately perpendicular to the axis of rotation of the main warb and in each case approximately 180° by the terminal loops of the endless drive belt 48.
The tension side and slack side of the drive belt 48 are respectively wrapped around the pulleys 50 and 5.
(1.5) A bearing casing 46 for the bearing of the main worm 44 and the drive pulley 47 connected thereto in a relatively non-rotatable manner, and a bearing casing 46 for the tension pulley 53. and a bearing casing 54 are movable independently relative to each other in a direction approximately perpendicular to the yarn running path and are fixable in at least two end positions. 2. The bearing casing 46 for the main weave 44 and the drive pulley 47 rests on a stop 76 whose movement can be adjusted in the direction of the yarn running track and which can be fixed in at least two end positions. The friction false twisting device described. 3. Frictional false-twisting device according to claim 2, wherein the bearing casing 46 for the main warb 44 and the drive pulley 47 is spring-loaded towards the stopper 76. 4. The support point of the spring for the bearing casing 46 is located on the main frame 38 of the friction false twisting device.
4. A friction false twisting device according to claim 3, which can be fixed in position in two end positions 60, 61. 5 The bearing casing 46 for the main warb 44 and the drive pulley 47 is attached to one free end of a parallel spring 63, the other end of which is fixedly tensioned to the main frame 38 of the friction false-twisting device. A friction false twisting device according to claim 1. 6 Tension pulley 53 formed as a direction change pulley
2. A friction false twisting device as claimed in claim 1, in which the bearing casing 54 of is pressed by a force generator in a direction away from the yarn running track so as to tension the drive belt 48. 7. The frictional false-twisting device according to claim 6, wherein the support portion 57 of the spring 55 provided on the main frame 38 of the frictional false-twisting device can be fixed in position at at least two positions 71, 72. 8. The bearing casing 54 for the tensioning pulley 53 is fixed to the free end of a parallel spring, the other end of which is fixedly tensioned to the main frame 38 of the friction false-twisting device. The friction false twisting device according to scope 6. 9 The bearing casing 46 for the main warb 44 and the drive pulley 47 and the bearing casing 54 for the tension pulley 53 have one common parallel spring 78
9. A friction false-twisting device as claimed in claim 8, in which the parallel springs 78 are fixedly tensioned in their central region to the main frame 38 of the friction false-twisting device. 10. The friction false twisting device according to claim 5, wherein the support points of the parallel springs 63, 78 can be fixed in at least two end positions 60, 61; 80, 81. 11 The friction surface of the friction false-twisting device consists of two endlessly circulating friction belts 83, 84, each of which is tensioned by a pair of rollers 85-88 and approximately parallel to the drive belt. The pulleys 50, 5 intersect the thread running track at an adjustable angle of intersection in parallel clamping planes, and the upper or lower roller of each pair of rollers when viewed from the thread running track
2. The friction false twisting device according to claim 1, which supports 2. 12 At least one of the friction belts is provided with a tapepet-shaped crimping device that slides on the back side of the friction surface of the friction belt.
12. The friction false twisting device according to claim 11, wherein the friction false twisting device is elastically pressed toward the yarn running track and the other friction surface within a prescribed tightening range. 13 Each roller pair has one holder 89,
90, each holder is rotatable around mutually coaxial pivot axes 91, 92 perpendicular to the tightening plane, and is fixed at an angular position symmetrical with respect to the thread running path. A friction false twisting device according to claim 11, which is possible. 14 The pivot shafts 91 and 92 of the holding bodies 89 and 90
13. A friction false twisting device according to claim 12, wherein the crimping device is located coaxially with respect to the tapepet-shaped crimping device. 15 The friction surface consists of the adjacent surfaces of two rotating discs 1 and 2, and the discs 1 and 2 clamp the thread in a limited tightening range, and the friction surface The same discs 1, 2 are supported so as to intersect with the yarn running path at an adjustable angle of intersection in a tightening plane substantially perpendicular to the thread running path, and each disc 1,
2 has the pulleys 50, 5 on the side opposite to the tightening plane.
2. The friction false twisting device according to claim 1, which supports 2. 16. The friction temporary according to claim 15, wherein the distance between the axes of both discs 1 and 2 is adjustable so that both discs are fixed in position at a plurality of positions symmetrically with respect to the yarn running track. Twisting device. 17. The friction false twisting device according to claim 16, wherein the disc bearings are each fixed to one rocking body 40, 41 in order to change the distance between the axes. 18. At least one of the discs 2 is made of a bendable flexible material and is pressed elastically from the back side by a tapepet-shaped crimping device 10 towards the thread running track and the other friction surface. The friction false twisting device according to scope 15. 19 The rocking bodies 40, 41 for disc bearings
18. The friction false twisting device according to claim 17, wherein the pivot axis 39 of the crimping device 10 is coaxial with the crimping device 10.