JP2019131947A - Double-row type ring spinning machine having draft device - Google Patents

Abstract

To provide a ring spinning machine with a long draft device, a draft device bottom roller of which is driven to avoid adequately twist.SOLUTION: A double-row type ring spinning machine has a draft device, a bottom roller of which can be driven by a drive device arranged on an end side of the machine and at least one additional auxiliary drive device 28. The auxiliary drive device has one electric motor type drive device 29, one main transmission 30, and two distribution transmissions 31. The two distribution transmissions are allotted to the bottom roller, and each have a fixing device 33. The fixing device is connected to the bottom roller at a support point 38 in a first intermediate space between two working units so as to support the distribution transmission. The distribution transmission is connected to the bottom roller at a drive point 18 in a second intermediate space between two working units so as to transmit a torque.SELECTED DRAWING: Figure 3

Description

  The present invention is a double-row ring spinning machine, comprising a draft device provided on the side of each machine, and the draft devices are arranged one after the other in the traveling direction of the fiber bundle, It has a plurality of draft device bottom rollers rotating at different rotational speeds, and these draft device bottom rollers can be driven by a drive device arranged on the machine end side and at least one additional auxiliary drive device The draft device is a part of a plurality of work units arranged side by side on the side of each machine, and the auxiliary drive device does not increase the pitch of the work unit of the ring spinning machine, or a plurality of The present invention relates to a double row ring spinning machine which is formed so as to be able to be inserted into a ring spinning machine without having to omit one of the working units.

  As is well known, the ring spinning machine of recent years, in which the drafting machine bottom roller of the drafting machine has a large length, is often equipped with 1000 or more working units. There is a problem that the rollers are twisted to different degrees under the action of the applied torque and the different torsional resistances.

  The length from which the draft device bottom roller is prominently generated depends on various factors such as roller diameter, bearing friction, braking by a pulled apron, and the like. These different degrees of twisting have little adverse effect during normal operation of the drafting device, but can lead to draft defects when accelerating and / or decelerating the drafting device bottom roller, for example starting and stopping the drafting device. Often it ends up. That is, depending on whether the twist of one draft device bottom roller occurs first or later, a thin portion or a thick portion is generated in the yarn. This results in quality loss or even yarn breakage during yarn production.

  Thus, various devices have already been proposed which prevent or at least reduce harm to different degrees of twisting in the bottom rollers of large length drafting devices. German Offenlegungsschrift 26 41 434 (DE 26 41 434 A1) describes, for example, different embodiments of such a device.

  In the first embodiment, for example, it is proposed that a draft device driving device is provided on one side of the drafting device of the ring spinning machine, and an auxiliary transmission device is provided on the ring spinning machine side opposite to the draft device driving device. ing. This auxiliary transmission device ensures that the angular position of the draft device bottom roller is maintained even when the draft device is started, stopped or at rest.

  However, in such a configuration, it must be ensured, for example, that the draft ratio change in the main transmission of the draft device at the time of changing the yarn count is performed correspondingly in the auxiliary transmission device. This not only invites a lot of additional work, but also constitutes a dangerous source of failure that can lead to significant damage to the drafting device.

  In another embodiment, it is proposed to install an auxiliary motor that can introduce torque to the draft device bottom roller on the side of the draft device bottom roller opposite to the draft device drive device, instead of the auxiliary transmission device. Yes.

  In connection with the very long ring spinning machine, it is further proposed in the third embodiment to arrange another additional drafting device drive at approximately the longitudinal center of the drafting device. However, such an arrangement of the drafting device drive device in the central region in the longitudinal direction of the drafting device bottom roller has the notable disadvantage that a series of work unit pitches are obstructed at this point. That is, in such an embodiment, not only the structure of the ring spinning machine becomes extremely complicated, but in particular, an apparatus for automatically replacing the roving bobbin and / or the spinning cup has been proposed. In some cases, additional expensive means are also required which are partly laborious.

  German Patent Application No. 10040420 (DE 100 40 420 A1) also describes various embodiments of the draft device unit for a ring spinning machine.

  In all embodiments, at least one draft device bottom roller of the plurality of draft device bottom rollers is driven at more than two drive locations along its length. That is, in this known draft device unit, the draft device main drive device is clearly omitted at the end of the draft device bottom roller, and the drive of the draft device bottom roller is distributed and arranged with respect to the draft device bottom roller. It is only done by a plurality of individual drives.

  However, the embodiment described in DE 100 40 420 is not useful and correspondingly not accepted in practice.

  The above also applies at least partly to the embodiment of the ring spinning machine draft device known from WO 2007/057148 (WO 2007/057148 A2). In the same issue, for example, a ring spinning machine equipped with a long draft device is described. The draft device has not only one draft device main drive device arranged on the machine end side but also a plurality of auxiliary drive devices arranged distributed over the length of the draft bottom roller. These auxiliary drive devices or their transmission mechanisms allow the auxiliary drive device to act on the draft device between the work units without having to increase the pitch interval of the work units of the ring spinning machine or omitting the work units. It has a configuration that is narrow enough to make it possible.

  However, the embodiment for the narrow auxiliary drive that can be positioned between the working units of the ring spinning machine disclosed in WO 2007/057148 is very schematic and, in fact, almost understood by those skilled in the art. It is not possible. Also, a ring spinning machine having a draft device equipped with an auxiliary drive device described in the same issue has not been known so far.

  Starting from the prior art described above, the object of the present invention is to provide a ring spinning machine with a long drafting device having a drafting device bottom roller which is driven in such a way that twisting is sufficiently avoided. Provided is a ring spinning machine in which an additional auxiliary drive is formed and positioned so that it is not necessary to increase the pitch of the work units or to omit one of the work units. That is.

  According to the present invention, there is provided a double row ring spinning machine including a draft device provided on the side of each machine, and the draft device is arranged in the traveling direction of the fiber bundle. This is solved by a double row ring spinning machine having a plurality of draft device bottom rollers which are arranged at different rotational speeds. The draft device bottom roller can be driven by a drive device arranged on the machine end side and at least one additional auxiliary drive device. On the side of each machine, a plurality of work units are arranged side by side. Each draft device is part of a work unit. According to the present invention, the auxiliary drive device has one electric motor type drive device, one main transmission device, and two distribution transmission devices. One distribution transmission device of both distribution transmission devices is assigned to one draft device bottom roller of the draft device arranged on one machine side, and the other distribution transmission device is on the other machine side side. Is assigned to one drafting device bottom roller. Each distribution transmission device is provided with a fixing device, which is connected to each draft device bottom roller at a support location in a first intermediate space between the two working units for supporting the distribution transmission device. Has been. Furthermore, the distribution transmission device is connected to each draft device bottom roller at a drive location in a second intermediate space between the two working units, respectively, for torque transmission.

  Advantageous configurations of the invention are the subject of the dependent claims.

  That is, according to the present invention, the support function and the torque transmission function are separated from each other. The drive location is formed so that torque is transmitted. In this place, the support function can be omitted completely or partially based on the fixing device provided. As a result, the connecting portion between the distribution transmission device, the draft device bottom roller, and the drive portion can be formed with a correspondingly narrow width. The support function is assumed by the fixing device. This fixing device guarantees reliable position fixing of the auxiliary drive device during spinning operation in both the radial direction and the axial direction. The fixing device does not need to transmit torque and serves only for support. As a result, the connecting portion between the fixing device and the draft device bottom roller at the support location can be formed with a correspondingly narrow width.

  Therefore, the configuration and arrangement of the auxiliary drive device according to the invention makes it possible to ensure a sufficient twist-free operation of the long draft device bottom roller of the draft device of the ring spinning machine, and thus the ring spinning machine during the spinning process. In addition to ensuring that there is never a negative impact on the operation of the working unit of the present invention, the auxiliary drive unit formed according to the present invention is based on its compact construction and can be used in almost any draft device of a ring spinning machine. It can also be incorporated into the place without any problem. The compact configuration is further achieved by using the driving device and the main transmission in common on both sides of the machine.

  Of course, it is also possible to load a plurality of auxiliary drive devices simultaneously into the drafting device of the ring spinning machine. By using a plurality of auxiliary drive devices, for example, a reduction in the diameter of the draft device bottom roller can be achieved without the risk of increased twisting with adverse consequences.

  Based on the compact configuration of the auxiliary drive device, it is further guaranteed that the spindle unit of the ring spinning machine need not be increased and the work unit need not be omitted even when the auxiliary drive device is installed.

  According to the present invention, the auxiliary drive device is connected to one draft device bottom roller among the plurality of draft device bottom rollers via the distribution transmission device, and in this case, the drive energy is transmitted at the drive location. As well as being able to absorb the reaction torque of the transmitted energy, it is fixed in position by a fixing device.

  According to a preferred embodiment of the present invention, each fixing device is attached to each drafting device bottom roller at another supporting point in a third intermediate space between the two working units for supporting the distribution transmission. It is connected. The distribution of the support force to the two support points is in line with the intention of the narrow configuration of the connection between the fixing device and the draft device bottom roller. Preferably, the drive point is located in the middle between the two support points. Thereby, the support location is arranged symmetrically with respect to the drive location. This provides not only optimal support but also optimal torque transmission. The load applied to the drive location is surely reduced by the support force.

  Preferably, the auxiliary driving device is connected to the intermediate bottom roller of the drafting device of the ring spinning machine. The connection of the auxiliary drive device to the intermediate bottom roller of the drafting device is highly recommended, especially because the drafting device apron is moved by the intermediate bottom roller. The draft apron must overcome a relatively high resistance when sliding through the turning edge of the apron retainer. This leads to a relatively high torsional load of the draft device bottom roller.

  However, it is equally recommended to connect the auxiliary drive to one of the other drafting device bottom rollers of the ring spinning machine drafting device. In an alternative embodiment, the auxiliary drive device may be connected, for example, to an inlet bottom roller or an outlet bottom roller of a ring spinning machine draft device.

  Furthermore, as a matter of course, it is also possible to connect one auxiliary drive device to each of the draft device bottom rollers of the draft device of the ring spinning machine. It can also be extremely advantageous to use a plurality of auxiliary drive devices simultaneously for each draft device bottom roller.

  In another advantageous embodiment, it is further proposed that the main transmission device and the distribution transmission device are each connected via a cross joint, which is preferably covered by a housing. . The arrangement of such a cross joint between the main transmission device and the distribution transmission device has the advantage that it is not necessary to adjust the direction of the distribution transmission device with respect to the main transmission device, especially when the distribution transmission device is replaced. Have. Furthermore, the accessory housing prevents the cross joint from being prematurely damaged by environmental conditions common in the spinning mill. In other words, the housing reliably protects the cross joint against floating fibers (Verflugung) and / or dust (Verstaubung). This has a very advantageous effect on the functionality and lifetime of the cross joint.

  The rotational speed of such a draft device bottom roller assisted by the auxiliary drive device is set by the main drive device of the draft device, and the rotational speeds of the various draft device bottom rollers are generally very different, It is necessary for each of the distribution transmission devices to work at an appropriate reduction ratio.

  Therefore, in an advantageous embodiment, the distribution transmission has a transmission reduction ratio that is adjusted in accordance with the rotational speed of the corresponding draft device bottom roller. Therefore, by selecting a distribution transmission device having an appropriate transmission device reduction ratio, the auxiliary drive device can easily be accurately adapted to the rotational speed of the draft device bottom roller to be assisted.

  Each draft device bottom roller may have a shaft pinion at a drive location for transmitting torque from the distribution transmission device to each draft device bottom roller. This shaft pinion can be formed as a gear machined into a draft device bottom roller, which meshes with the gear of the distribution transmission. Torque can be transmitted without problems. However, no axial support is provided at the drive location. Radial support is only to a limited extent. Axial and radial support is provided by the fixing device according to the invention.

  Furthermore, in an advantageous embodiment, the fixing device for the auxiliary drive device has a locking element fixed to the housing of the distribution transmission, and this locking element is located at the end of the locking device at the end. It is specified that a bearing support for connection to each draft device bottom roller is provided. Each of the bearing supports preferably includes a rotation bearing. A sliding bearing or a rolling bearing can be used as the bearing for rotation. Via the locking element of the fixing device and the bearing support, the distribution transmission device is reliably connected to the corresponding draft device bottom roller of the draft device.

  The ring spinning machine preferably has a plurality of roller stands, and the draft device bottom roller is supported on these roller stands, and the auxiliary drive device is preferably disposed between two adjacent roller stands. Has been.

  Furthermore, the fixing device comprises a tensioning element and / or a pressing element that connects the fixing device to adjacent roller stands. In other words, this pulling element and / or the pressing element ensures that a force that can ultimately damage the distribution transmission device is not introduced into the fixing device. The tension element and / or the pressing element preferably receives an axial force.

  Furthermore, in an advantageous embodiment, it is specified that the electric motor type drive device of the auxiliary drive device is formed as an asynchronous motor. Such asynchronous motors constitute a useful drive unit that is frequently used in the textile machinery industry. This drive unit can also be obtained relatively inexpensively as a mass production component by an appropriate specialist.

  The present invention will be described in detail below based on the embodiments shown in the drawings.

It is a side view of a double row type ring spinning machine provided with a long draft device in which at least one draft device bottom roller of a plurality of draft device bottom rollers has an auxiliary drive device. It is a schematic plan view of a draft device in which an auxiliary drive device is connected to an intermediate bottom roller of a draft device of a double row ring spinning machine. FIG. 3 is a plan view of an auxiliary drive device formed in accordance with the present invention with a distribution transmission connected to an intermediate bottom roller of a drafting device of a ring spinning machine. FIG. 4 is a perspective view of an auxiliary driving device formed according to the present invention shown in FIG. 3.

  FIG. 1 shows a double row ring spinning machine 1 in a side view. The ring spinning machine 1 is provided with a number of identical work units 2 in a region on the side in the machine longitudinal direction.

  As is well known, these work units 2 are each a device arranged at a fixed position, for example, a draft device 3, a spindle rail 4, and a device supported so as to be movable in the vertical direction, such as a ring rail 11, a balloon. It has a limiting ring 12 and a thread guide 13.

  Further, the work unit 2 of the ring spinning machine 1 generally includes a creel 14. A roving bobbin 15, a so-called “flyer bobbin” is suspended from the creel 14. The roving bobbin 15 is processed by the work unit 2 to form a spinning cup. The spinning tube of the spinning cup rotates with the spindle 5 arranged on the spindle rail 4 during the spinning process. As is apparent, the ring spinning machine 1 further has a so-called “cup changer 6”. The cup changing device 6 has gripping devices 7 arranged on the gripper rails 8 respectively. With this gripping device 7, the completed spinning cup can be transferred to the transfer device 9 corresponding to the machine length, and a new empty tube can be transferred to the spindle 5 of the spindle rail 4.

  Furthermore, the ring spinning machine 1 is provided with suction passages 16 on both sides in the machine longitudinal direction, as is well known. A so-called “roller stand 10” is attached to the suction passage 16. Draft device bottom rollers 21, 22 and 23 of the draft device 3 are supported on the roller stand 10 via a support carriage 17.

  In the present embodiment, the draft device 3 has three draft device bottom rollers, that is, an entrance bottom roller 21, an intermediate bottom roller 22, and an exit bottom roller 23, as will be apparent particularly based on FIG. ing. The corresponding draft device top roller 24 is supported by the support / loading arm 19 in the conventional manner. The support / loading arm 19 is attached to a support tube 20 with limited movement. The support tube 20 itself is fixed to the roller stand 10. Further, two parallel support / stabilization tubes 25 extending in the machine longitudinal direction extend through the roller stand 10.

  FIG. 2 shows a very schematic plan view of the draft device 3 of the double row ring spinning machine 1.

  Such a double-row ring spinning machine 1 has one draft device 3 arranged side by side in each region on both sides in the machine longitudinal direction. The draft device 3 has one inlet bottom roller 21, one intermediate bottom roller 22, and one outlet bottom roller 23 on the side in the machine longitudinal direction. These draft device bottom rollers 21, 22, and 23 are rotatably supported by a plurality of roller stands 10 via a support carriage 17 (not shown in FIG. 2) as is conventional. These roller stands 10 are arranged at regular intervals along the ring spinning machine 1. The rotary drive of the draft device bottom rollers 21, 22, and 23 is performed by a main drive device 26 disposed on the machine start end side and a synchronous drive device 27 disposed on the machine end side opposite to the ring spinning machine 1. . Further, as shown in FIG. 2, the auxiliary drive device 28 formed according to the present invention is installed in the intermediate region M of the ring spinning machine 1 having the length L. The auxiliary drive device 28 is connected to the intermediate bottom roller 22 of the draft device 3 in this embodiment.

  As shown in the figure, the auxiliary drive device 28, which will be described in detail below with reference to FIGS. 3 and 4, includes one electric motor type drive device 29, one main transmission device 30, and two distribution transmission devices 31. have. Both distribution transmission devices 31 are connected to a support portion 38 of the intermediate bottom roller 22 of the draft device 3 by a fixing device 33.

  In FIG. 3, the auxiliary drive device 28 formed according to the present invention, interposed between the two roller stands 10 of the ring spinning machine 1, is shown in a plan view with an enlarged dimension.

  As can be seen, the auxiliary drive 28 has an electric motor drive 29, preferably an asynchronous motor. This electric motor type drive device 29 is connected to a main transmission device 30 which is preferably formed as a gear transmission. Two distribution transmission devices 31 are connected to the main transmission device 30 through cross joints 32, respectively. Both distribution transmission devices 31 themselves are connected to one intermediate bottom roller 22 of the draft device 3 at the drive point 18. That is, the gear transmission of the distribution transmission 31 acts on each of the correspondingly arranged gears arranged on the intermediate bottom roller 22, and transmits the torque generated by the auxiliary drive device 28 to the intermediate bottom roller 22. To do.

  As is apparent, a fixing device 33 is installed in the housing 34 of the distribution transmission device 31. The locking elements 35 of the fixing device 33 are each provided with a bearing support 36 on the end side. A rotating bearing, that is, a sliding bearing or a roller bearing is disposed in the bearing support 36, and the corresponding intermediate bottom roller 22 of the draft device 3 rotates in the rotating bearing. As a result, the bearing for rotation forms the support portion 38.

  In order to be able to compensate for the axial moment that occurs during operation, the fixing device 33 further comprises a tension element and / or a pressing element 37. The fixing device 33 is connected to the adjacent roller stand 10 via the tension element and / or the pressing element 37.

  FIG. 4 shows a perspective view of the auxiliary drive device 28 formed in accordance with the present invention.

  As can be seen from FIG. 3, the auxiliary drive 28 has an electric motor drive 29, preferably an asynchronous motor. The electric motor type driving device 29 is connected to the main transmission device 30. The main transmission device 30 itself is connected to two distribution transmission devices 31 via a cross joint 32. Both distribution transmission devices 31 are respectively connected to the intermediate bottom roller 22 of the draft device 3 of the ring spinning machine 1. That is, the torque applied by the electric motor type driving device 29 is transmitted to the intermediate bottom roller 22 of the draft device 3 through the main transmission device 30 and the distribution transmission device 31.

  In order to protect the distribution transmission 31 and thus the auxiliary drive device 28 against harmful overall axial forces, the distribution transmission 31 further comprises a fixing device 33, respectively. That is, the lock element 35 is disposed in the housing 34 of the distribution transmission device 31. The locking elements 35 themselves each have a bearing support 36 on the end side. A rotation bearing is disposed in the bearing support 36. The intermediate bottom roller 22 of the corresponding draft device 3 is supported in each of the rotation bearings. In order to compensate for the axial moment, the fastening device 33 further comprises a tension element and / or a pressing element 37. The fixing device 33 is connected to the adjacent roller stand 10 via the tension element and / or the pressing element 37.

DESCRIPTION OF SYMBOLS 1 Ring spinning machine 2 Working unit 3 Draft device 4 Spindle rail 5 Spindle 6 Cup changer 7 Gripping device 8 Gripper rail 9 Conveying device 10 Roller stand 11 Ring rail 12 Balloon restricting ring 13 Thread guide 14 Creel 15 Coarse yarn bobbin 16 Suction passage DESCRIPTION OF SYMBOLS 17 Support carriage 18 Drive location 19 Support / weight arm 20 Support pipe 21 Entrance bottom roller 22 Intermediate bottom roller 23 Exit bottom roller 24 Draft device top roller 25 Support / stabilizing tube 26 Main drive device 27 Synchronous drive device 28 Auxiliary drive device 29 Electric Motor type driving device 30 Main transmission device 31 Distribution transmission device 32 Cross joint 33 Fixing device 34 Housing 35 Locking element 36 Bearing support 37 Tension element and / or pressing element 38 Supporting point M Middle area of drafting machine of ring spinning machine L Machine length

Claims (10)

The double row ring spinning machine (1) includes a draft device (3) provided on the side of each machine, and the draft device (3) is arranged in the traveling direction of the fiber bundle. It has a plurality of draft device bottom rollers (21, 22, 23) arranged at different rotational speeds, and the draft device bottom rollers (21, 22, 23) are arranged on the machine end side. Drive unit (26, 27) and at least one additional auxiliary drive unit (28), and a plurality of work units (2) are arranged side by side on each machine side, In the double row ring spinning machine (1), the draft device (3) is a part of the work unit (2).
The auxiliary drive device (28) has one electric motor type drive device (29), one main transmission device (30), and two distribution transmission devices (31). One distribution transmission device of the devices (31) is assigned to one draft device bottom roller (21, 22, 23) of the draft device (3) disposed on one side of the machine, The other distribution transmission device (31) is assigned to one draft device bottom roller (21, 22, 23) of the draft device (3) disposed on the side of the other machine, and the distribution transmission The devices (31) are each provided with a fixing device (33), the fixing device (33) being a first intermediate space between two working units for supporting the distribution transmission device (31). Support points (3 ) Are connected to the respective draft device bottom rollers (21, 22, 23), and the distribution transmission device (31) is connected between the two work units (2) for torque transmission. A double row ring spinning machine (1), characterized in that it is connected to each of the draft device bottom rollers (21, 22, 23) at a drive point (18) in an intermediate space of two.   Each said fixing device (33) is connected to each said draft device bottom at another support point (38) in a third intermediate space between two working units for supporting said distribution gearing (31). 2. A ring spinning machine (1) according to claim 1, characterized in that it is connected to rollers (21, 22, 23).   3. A ring spinning machine (1) according to claim 2, characterized in that the drive point (18) is located in the middle between both said support points (38).   The main transmission device (30) is connected to the distribution transmission device (31) via a cross joint (32), respectively, and the cross joint (32) is preferably covered by a housing. The ring spinning machine (1) according to any one of claims 1 to 3.   The distribution transmission device (31) has a transmission gear reduction ratio adjusted according to the rotational speed of the corresponding draft device bottom roller (21, 22, 23), respectively. The ring spinning machine (1) according to any one of 1 to 4.   Each of the draft device bottom rollers (21, 22, 23) has a shaft pinion for transmitting the torque from the distribution transmission device (31) to each of the draft device bottom rollers at the drive point (18). The ring spinning machine (1) according to any one of claims 1 to 5, characterized in that it has a ring spinning machine (1).   The fixing device (33) has a locking element (35) fixed to a housing (34) of the distribution transmission device (31), and the locking element (35) is arranged on the end side, respectively. 2. A bearing support (36) for connecting (33) to each of said draft device bottom rollers (21, 22, 23) at said support location (38). The ring spinning machine (1) according to any one of 6 to 6.   The ring spinning machine (1) according to claim 7, characterized in that a bearing for rotation is arranged in the bearing support (36).   The ring spinning machine (1) has a plurality of roller stands (10), and the draft device bottom rollers (21, 22, 23) are supported on the roller stands (10), and the auxiliary drive 9. A ring spinning machine (1) according to any one of the preceding claims, characterized in that the device (28) is arranged between two adjacent roller stands.   The fixing device (33) comprises a tension element and / or a pressing element (37) connecting the fixing device (33) to the roller stands (10) adjacent to each other. 9. A ring spinning machine (1) according to item 9.