JP2009527433A - Device and winder for guiding yarn - Google Patents

Abstract

  The present invention relates to a device for guiding a traveling yarn and a winder for winding a continuously supplied yarn onto a yarn package. The winder is provided in the form of a pressure roller that is driven by a device for guiding the traveling yarn. The roller forms a rotor of the electric motor by a guide peripheral wall that guides the yarn on the peripheral surface. This electric motor drives the roller. The outer stator that cooperates with the rotor generates a moving magnetic field outside the guide peripheral wall, and the rotor follows this moving magnetic field.

Description

  The present invention is an apparatus for guiding a traveling yarn of the type described in the superordinate conceptual part of claim 1, and is provided with a rotatably supported roller, and the roller is provided on a guide peripheral wall. The present invention relates to a guide type in which yarn is brought into contact with a guide region and the guide peripheral wall can be driven by an electric motor including a rotor and a stator. Furthermore, the present invention is a winding machine of the type described in the high-order concept part of claim 9, that is, a winding machine for winding a continuously supplied yarn onto a yarn package, for accommodating the yarn package. A winding spindle that is rotatably supported and driven, a traverse device for traversing the yarn to be wound in the package axis direction, and two bearings for mounting the traversed yarn on the package And a pressing roller rotatably supported by the motor, and the pressing roller can be driven by an electric motor including a rotor and a stator.

  An apparatus for guiding a traveling yarn serves to guide and transport the yarn by means of a rotatably supported roller in a yarn processing facility. In particular, these devices fulfill functional features such as yarn travel turning, yarn loading due to yarn tension with conveying or braking action, or yarn loading on a rotating package. For this purpose, the yarn is partially or even multiply wound on the roller, so that a force can be transmitted to the yarn according to Eytelweinschen. It is also known to transmit a force to a yarn by clamping the yarn between a roller and a counter roller.

  In particular, a roller driving device for steady operation is not necessary for a roller whose function characteristic “turning” is to be realized. The roller supported by mobility is driven by the traveling yarn. However, the speed difference between the yarn and the surface of the roller peripheral wall after the unsteady process, for example, for increased speed operation after interruption of operation or when the running yarn is absent for a short time In order to keep the thread small and thus protect the thread, an additional drive must be provided. This may be true for partially wound yarns, for multiple wound yarns, or for yarns clamped between a roller and a counter roller.

  An exemplary device for guiding a traveling yarn is a press roller of a winder for winding continuously supplied yarn onto a package. For this purpose, the yarn is first traversed in the transverse direction perpendicular to the yarn traveling direction by a traversing device and guided through a rotating pressing roller. The pressure roller turns the yarn and places the yarn on the same rotating package to be wound up. In this case, a plurality of packages are usually arranged on one common winding spindle in alignment with each other. Thereby, a plurality of yarns can be wound up simultaneously.

  In the winder known from EP-A-086 1800, the package is brought into the rotation necessary for winding by a directly driven winding spindle. In addition, the pressing roller is driven with a small torque by the electric motor. This has the advantage that the pressing roller does not have to be driven only by the circumferential friction force of the yarn on the package. This avoids damage to the uppermost yarn layer due to slip. Furthermore, the electric motor type drive of the pressure roller prevents the rotation speed of the pressure roller from being reduced during package replacement.

  However, this solution has the disadvantage that the pressure roller must be coupled to an additional electric motor. Apart from the installation space occupied by this electric motor, time-consuming means are required for coupling this electric motor to the pressing roller so as to be able to cope with high rotational speeds.

  Indeed, it is known from EP 0 362 636 that the pressure roller is driven by a compact compressed air turbine. However, this requires additional supply of compressed air and laborious control of the pressure roller by pneumatic pressure.

  The object of the present invention is therefore to provide a simple, space-saving and inexpensive means for driving a device for guiding traveling yarns. In particular, it is an object of the present invention to provide a winder having simple, space-saving and inexpensive means for driving a pressure roller.

  According to the invention, this problem is solved by the fact that the guide circumferential wall of the rotatable roller also forms the rotor of the electric motor that drives the roller. The outer peripheral surface of the roller has a guide peripheral wall, which guides the yarn within the guide region. Outside the rotor, the rotor of the electric motor surrounds the rotor. This has the advantage that there is no need to provide an externally arranged electric motor. At the same time, a time-consuming connection between the roller and the externally arranged electric motor, which is suitable for a high rotational speed, is also unnecessary. This solution is suitable not only for the pressure roller mentioned by way of example, but also for another device for guiding the traveling yarn, with the roller being driven with a small drive output. A typical example is an overrunning roller (Ueberlaufrollen) used in combination with Godet, for example.

  In a refinement of the invention, the guiding peripheral wall consists of a conductive material inside and / or outside the guiding region. As a result, the rotating electromagnetic field generated by the stator surrounding the rotor generates an eddy current in the rotor, which also generates an electromagnetic field, which interacts with the rotating electromagnetic field of the stator. The rotor is driven to rotate. This has the advantage that the same material can be used for the rotor that was originally used to manufacture the pressure roller. This makes this configuration very inexpensive.

  In another advantageous variant, the rotor has a plurality of rings or segments of conductive material. Thereby, a higher torque can be achieved compared to the variants listed above.

  In a further advantageous variant of the invention, the rotor consists of a composite material. In this case, at least one component of the composite material is a highly conductive material.

  In yet another particularly advantageous variant, a plurality of conductor tracks are introduced in the rotor. These conductor tracks are connected to each other so as to form a coil. Therefore, the rotor structure corresponds to the rotor of a three-phase AC asynchronous motor.

  In another advantageous embodiment of the invention, the stator of an electric motor with integrated coils extends tangentially over one or more partial segments of the rotor circumference. This is particularly necessary when the rotor extends over the guide area in the axial direction. In this case, the stator does not extend tangentially over the entire circumference of the rotor, but may extend only over one segment.

  In another refinement, the stator coils are arranged in the segments so that the radially acting magnetic force between the rotor and the stator is at least partially offset. This can be the case if the coils are arranged, for example, at least partially facing one another.

  In a further advantageous embodiment, the roller is a winder press roller. The invention is particularly advantageous in this particular pressure roller. This is because in a package driven by a take-up spindle, driving of the pressure roller is only required at start-up and package replacement. Therefore, there is no need for driving optimized for good efficiency.

  It is a further object of the present invention to provide a winder having simple, space-saving and inexpensive means for driving a pressure roller. This problem is solved according to the invention by the fact that the rotatable pressing roller extending over the region between the two bearings also forms the rotor of an electric motor that drives the roller at the same time. Outside the rotor, the rotor of the electric motor surrounds the rotor. Also in this case, there is an advantage that it is not necessary to provide an electric motor arranged outside. At the same time, there is no need for laborious connections suitable for high rotational speeds between the roller and the externally arranged electric motor.

  In yet another particularly advantageous embodiment, the peripheral wall surface of the pressure roller simultaneously forms the rotor of the electric motor. This is particularly advantageous because the peripheral wall surface of the pressing roller provides a pressing function. Thus, no additional elements are required to bring about the function of the electric motor rotor. On the contrary, the existing electromagnetic properties of the peripheral wall surface are utilized, or the peripheral wall surface has additional electromagnetic properties.

  In yet another advantageous embodiment of the invention, the region that produces the function of the rotor of the electric motor extends at least partially over the region of the longitudinal axis of the pressure roller where the pressure roller is in contact with the package. . With such a double use, the length of the pressing roller does not become larger than needed for the pressing function.

  In yet another embodiment of the invention, the rotor is made of a conductive material. As a result, the rotating electromagnetic field generated by the stator surrounding the rotor generates an eddy current, which also generates an electromagnetic field, which is rotated in the stator so that the rotor is driven to rotate. Interact with. This variant has the advantage that the same material can be used for the rotor as was originally used to produce the pressure roller. This makes this embodiment very inexpensive.

  In yet another variant of the invention, the rotor consists of a composite material. In this case, at least one component of the composite material is a highly conductive material. Thus, it is known from German Patent Application No. 4416184 to form a pressing roller from a fiber reinforced plastic ridge and a thin metal sleeve as an outer peripheral wall. By using a first component with high conductivity, a comparable structure is also possible in the winder according to the invention. The role of the second component is to ensure the breaking strength required at high rotational speeds. This can be said for example in fiber reinforced plastics.

  In yet another advantageous variant, the rotor has a plurality of segments made of a conductive material. As a result, a higher torque can be achieved as compared with the aforementioned variation.

  In a particularly advantageous variant, a plurality of conductor tracks are introduced into the rotor in the form of coils. Thus, the configuration of the rotor corresponds to a three-phase AC asynchronous motor.

  In a further advantageous embodiment of the invention, the stator of the electric motor with integrated coils extends tangentially over one or more partial segments of the rotor circumference. This is particularly necessary when the rotor extends in the axial direction over the area of the pressure roller in contact with the package. In this case, the stator does not extend tangentially over the entire circumference of the rotor, but may extend only over one segment.

  In yet another particularly advantageous refinement, the coils of the stator are arranged in the segments so that the magnetic forces acting radially between the rotor and the stator are at least partially offset. This can be the case if the coils are arranged, for example, at least partially facing one another.

In the following, the invention will be described in detail with reference to the drawings.
FIG. 1 is a cross-sectional view symbolically showing from the side a winder according to the invention, which has a device according to the invention for guiding running yarns,
FIG. 2 is a sectional view of the winder according to the present invention as seen from the front.
FIG. 3 is a diagram showing another embodiment of the winder shown in FIG.
FIG. 4 is a sectional view of a variation of the device for guiding the traveling yarn,
FIG. 5 is a sectional view of another variant of the device for guiding the traveling yarn,
FIG. 6 is a cross-sectional view of yet another variant of the device for guiding the traveling yarn,
FIG. 7 is a cross-sectional view of an apparatus for guiding a traveling yarn having rollers rotatably supported;
FIG. 8 is a cross-sectional view of a variant of the device for guiding the traveling yarn, having a roller rotatably supported.

  FIG. 1 symbolically shows a winding machine according to the invention with a device according to the invention for guiding traveling yarns in the form of a cross section. FIG. 2 shows the winder in a front view. A winder for simultaneously winding two yarn packages is shown. This figure is representative of a winder having one or many yarn packages. Hereinafter, one yarn traveling will be described. The winding of the other yarn running is performed synchronously.

  Yarn 1 is continuously fed to the top yarn guide 2 from equipment (not shown) for forming and processing the yarn. The yarn 1 is traversed by a traversing device 3 in a plane parallel to the rotational axis of the yarn package 8. Subsequently, the yarn 1 is wound up on a rotating yarn package 8 via a device 4 for guiding the traveling yarn. The device 4 has a pressure roller 4.3, which guides the yarn 1 through the guide peripheral wall 4.4 in the guide area 2.5. The yarn package 8 is formed on a winding rod 7 that is tightly attached to the winding spindle 6.1. The take-up spindle 6.1 is driven by the take-up spindle drive 12 such that the yarn pulling force of the yarn 1 is applied substantially by the action of the take-up spindle drive 12.

  In this winder, the winding spindle 6.1 is moved away from the axis of the pressing roller 4.3 by the turntable 11 in order to compensate for the increasing package diameter. Other means for compensating for the increase in diameter are also known. The present invention is not limited to the illustrated means.

  As soon as the yarn package 8 reaches its final diameter, the turntable 11 is further rotated until the winding spindle 6.2, which is also equipped with a winding rod, is located in the region of the pressing roller 4.3.

  The pressure roller 4.3 is supported between the two bearings 4.1, 4.2 and extends over at least a partial region between the two bearings 4.1, 4.2. In this partial area, the pressure roller 4.3 has a guiding peripheral wall 4.4. The pressing roller 4.3 is driven by an electric motor. This is necessary to overcome bearing friction without the need for a frictional force to be transmitted between the package surface and the pressure roller. Further, when the take-up spindles 6.1 and 6.2 are replaced by the rotation of the turntable 11, the rotation speed of the pressing roller 4.3 must be kept constant. For this purpose, the pressing roller 4.3 is also the rotor 5.1 of the electric motor 5 formed simultaneously from the rotor (rotor) and the stator (stator) 5.2. The stator 5.2 extends only over a circumferential segment that surrounds the rotor 5.1 for space reasons and has a plurality of electromagnetic coils 5.5. The rotational speed sensor 5.3 detects the rotational speed of the rotor 5.1 and transmits the rotational speed to the control device 5.4. The control device 5.4 processes the sensor signal so that the rotational speed of the rotor 5.1 corresponds to a predetermined target value.

  The coil 5.5 of the stator 5.2 generates an electromagnetic field, which generates an eddy current in the rotor 5.1. In this case, the control device 5.4 controls the electromagnetic coil 5.5 so that an electromagnetic field moving in the circumferential direction is formed. Based on the induced eddy current, the rotor 5.1 follows the moving electromagnetic field by rotation. The electromagnetic coil 5.5 is evenly distributed in the stator 5.2 as seen in the tangential direction or, as shown in FIG. 1, the electromagnetic acting between the rotor 5.1 and the stator 5.2. The tensile forces may be distributed so that they are at least partially compensated for each other.

  The rotor 5.1 is limited to the length region of the guide peripheral wall of the pressing roller 4.3. In this length region, the rotor 5.1 has a conductive material. This material is embedded in the guide peripheral wall of the pressure roller 4.3. The formation of the rotor 5.1 on the guide peripheral wall of the pressing roller 4.3 will be described in detail below.

  FIG. 3 shows another alternative embodiment of the winder according to the invention. The pressure roller 4.3 is extended on one side so that the stator 5.2 is located outside the guide area 4.5 where the pressure roller 4 is in contact with the yarn package 8. As a result, the stator 5.2 is arranged on the side, and the rotor 5.1 can be surrounded all around. On the other hand, this increases the construction length, so that the embodiment shown in FIG. 2 is more advantageous in this respect.

  4 to 6 are cross-sectional views of different embodiments of the rotor 5.1 showing how the rotor 5.1 is formed, for example, in the guide circumferential wall 4.4 of the pressure roller 4.3. It is shown in

  FIG. 4 shows a rotor 5.1 made of a composite material. In this case, the rotor 5.1 is formed of a support component 14, for example a fiber reinforced plastic that absorbs centrifugal forces at high rotational speeds, and a conductor 15 comprising a conductive material 5.6, for example aluminum. Aluminum has good conductivity at a low mass, but is not strong enough for the required rotational speed.

  In the embodiment shown in FIG. 5, the conductor 15 is divided into a plurality of circumferential segments. Thereby, the rotor 5.1 can follow the moving magnetic field of the stator 5.2 better.

  In the embodiment shown in FIG. 6, the conductors 15 are connected to each other by a connection part 16, in which case the conductor 15 forms a short-circuited electromagnetic coil. This structure corresponds to the structure of a three-phase AC asynchronous motor. In this case, the current induced by the moving magnetic field of the stator 5.1 can form a better oriented magnetic field, so that the torque is increased.

  7 and 8 show two variants of the device 4 according to the invention for guiding the traveling yarn. The device has a rotatably supported roller in the form of a godet peripheral wall 17. The godet peripheral wall 17 guides the yarn by contact of the guide peripheral wall 4.4 with the guide region 4.5. In this embodiment, the godet peripheral wall 17 is connected to the shaft 20 by a conical seat fixed by a screw (not shown). The shaft 20 is rotatably supported in a support rod 18 by a bearing 19. Such a form of the bearing is merely selected in this case, and the bearing of the roller on a fixed shaft or any other type of bearing is within the scope of the invention. is there.

  The guide peripheral wall 4.4 has the rotor 5.1 outside the guide region 4.5 as shown in FIG. 7, or the rotor 5.1 in the guide region 4.5 as shown in FIG. have. This rotor 5.1 cooperates with a stator 5.2 as an electric motor 5 which is arranged outside the guide peripheral wall 4.4 and at a distance from the guide peripheral wall 4.4. Therefore, the guide peripheral wall 4.4 constitutes the rotor 5.1 in the region of the free end of the godet peripheral wall 17 formed in a pot shape. Hereinafter, this region is referred to as “rotor 5.1”. In this case, the term “rotor” is simultaneously associated with the guiding peripheral wall 4.4. To be precise, the region 5.1 of the guide peripheral wall 4.4 gives the guide peripheral wall 4.4 the properties of a rotor.

  The rotor 5.1 may be made of a conductive material 5.6, ideally the same material as the rest of the guide peripheral wall 4.4. Alternatively, however, the rotor 5.1 may comprise an electrically conductive material distributed in an annular or segmented manner or may consist of a composite material having electrically conductive components. The conductive component may consist of conductor tracks that are interconnected to form a coil.

  The stator 5.2, which is arranged on the outside with a gap, has an electromagnetic coil 5.5. The electromagnetic coil 5.5 generates a rotating electromagnetic field that drives the rotor. In this case, the stator 5.2 completely surrounds the rotor 5.1 as shown in FIG. 7 or only partially surrounds the rotor 5.1 in the form of segments as shown in FIG. You can leave. The latter variant has the advantage that the yarn traveling through the guide region 4.5 can travel in the winding and unwinding directions with respect to the guide circumferential wall 4.4 without rubbing the stator 5.2. .

  Further, in order to allow the yarn to be placed on the guide peripheral wall 4.4 at the time of starting, the stator can be formed so as to be able to turn away from the stator.

  The present invention is not limited to the embodiment shown in FIGS. Basically, an individual thread or a plurality of threads are guided in order to form on the guide peripheral wall a rotor which forms an electric motor in cooperation with the stator, which is held at a distance from the rollers. And all rollers for processing are suitable. The present invention thus enables a completely new structure of the roller which allows a particularly compact mechanical structure. In this case, it is possible to drive the roller continuously or at a specified time interval. In particular, the structural separation between the rotor and the stator of the electric motor allows a high degree of freedom for driving the rollers. That is, the stator can be made movable, so that on the one hand the spacing between the rotor and the stator can be adjusted, and on the other hand a complete interruption of the drive can be carried out, whereby the yarn application. The attaching process or the maintenance work on the roller becomes possible.

1 is a cross-sectional view symbolically showing from the side a winding machine according to the invention with a device according to the invention for guiding a running yarn. It is sectional drawing which looked at the winder by this invention from the front. It is a figure which shows another Example of the winding machine shown in FIG. It is sectional drawing of the modification of the apparatus for guiding the thread | yarn to drive | work. FIG. 6 is a cross-sectional view of another variant of the device for guiding the traveling yarn. FIG. 6 is a cross-sectional view of yet another variation of a device for guiding a traveling yarn. FIG. 3 is a cross-sectional view of an apparatus for guiding a traveling yarn having a roller supported rotatably. FIG. 6 is a cross-sectional view of a variation of the device for guiding a traveling yarn with a rotatably supported roller.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Yarn 2 Top yarn guide 3 Traverse device 4 Device for guiding traveling yarn 4.1 Bearing 4.2 Bearing 4.3 Press roller 4.4 Guide peripheral wall 4.5 Guide area 5 Electric motor 5.1 Rotor 5.2 Stator 5.3 Speed sensor 5.4 Control device 5.5 Electromagnetic coil 5.6 Conductive material 6.1 Winding spindle 6.2 Winding spindle 7 Winding rod 8 Thread package 9 Cage 10 Bearing DESCRIPTION OF SYMBOLS 11 Turntable 12 Winding spindle drive device 13 Housing 14 Support component 15 Conductor 16 Connection part 17 Godet peripheral wall 18 Supporting rod 19 Bearing 20 Shaft

Claims (17)

  An apparatus for guiding a traveling yarn, which is provided with rollers (4.3, 17) that are rotatably supported, and the rollers (4.3, 17) are guided circumferential walls (4.4). ) In the guide area (4.5), and the guide peripheral wall (4.4) is an electric motor (5) comprising a rotor (5.1) and a stator (5.2). In the type that can be driven by the guide peripheral wall (4.4) simultaneously forms the rotor (5.1) of the electric motor (5), the stator (5.2) of the electric motor (5). Is held outside the roller (4.3, 17) and at a distance from the rotor, the device for guiding the traveling yarn.   Said guide peripheral wall (4.4) is electrically conductive material (5.6) at least in predetermined longitudinal sections outside or inside the guide region (4.5) to form a rotor (5.1). The device of claim 1, comprising:   3. The device according to claim 2, wherein the electrically conductive material (5.6) is arranged in an annular or segmented uniform distribution over the entire circumference of the guiding peripheral wall (4.4).   Device according to claim 2 or 3, wherein the guiding peripheral wall (4.4) consists of a composite material having at least one conductive component (15).   The guide peripheral wall (4.4) has a coiled conductor path (15), and the conductor path (15) is interconnected by a connecting portion (16) so as to form a coil. 4. An apparatus according to claim 2 or 3.   Over one or more partial segments of the circumferential wall circumference so that the stator (5.2) is located opposite to the rotor section of the guiding circumferential wall (4.4) by means of an electrical coil (5.5) 6. A device as claimed in any one of the preceding claims, which extends.   The coil (5.5) is formed and operable so that the magnetic force acting radially between the rotor (5.1) and the stator (5.2) is at least partially offset The device of claim 6, wherein   The device according to claim 1, wherein the roller is formed in the winder as a pressure roller (4.3).   A winding machine for winding a continuously supplied yarn (1) onto a yarn package (8), which is rotatably supported and driven to receive the yarn package (8). 6.1), a traverse device (3) for traversing the yarn (1) to be wound in the package axial direction, and a traversing yarn (1) for mounting on the package (8) A pressure roller (4.3) rotatably supported by two bearings (4.1, 4.2), the pressure roller (4.3) being a rotor (5.1) And the stator (5.2), which can be driven by an electric motor (5), the pressure roller (4.3) is moved between the bearings (4.1, 4.2) at the same time. It also constitutes the rotor (5.1) of the electric motor (5) and the stator ( .2) is outside the pressing roller (4.3), and the winding machine, characterized in that it is held at a distance from the push pressure roller (4.3).   Winding machine according to claim 9, wherein the guide peripheral wall (4.4) of the pressing roller (4.3) simultaneously forms the rotor (5.1) of the electric motor (5).   The rotor (5.1) extends at least partially over a longitudinal section of the pressure roller (4.3) where the pressure roller (4.3) is in contact with the yarn package (8). The winder according to 9 or 10.   Winder according to any one of claims 9 to 11, wherein the rotor (5.1) is made of a conductive material (5.6).   12. Winder according to claim 9, wherein the rotor (5.1) consists of a composite material having at least one conductive component (15).   12. The rotor according to any one of claims 9 to 11, wherein the rotor (5.1) has a plurality of segments distributed along the circumferential surface, made of a conductive material (5.6). Winder.   The rotor (5.1) has a coiled conductor track (15), the conductor track (15) interconnected to form a coil by a connection (16). Item 12. The winder according to any one of Items 9 to 11.   Winding according to any one of claims 9 to 15, wherein the stator (5.2) extends over one or more partial segments of the rotor circumferential surface by means of an electrical coil (5.5). Machine.   The electric coil (5.5) is formed and operated so that the radially acting magnetic force between the rotor (5.1) and the stator (5.2) is at least partially offset. The winder according to claim 16, which is possible.

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