Spinning station with pivotable spinning unit

Abstract

The invention relates to a spinning station comprising a drafting unit and a spinning unit for producing a yarn or roving from a supplied sliver, wherein the spinning unit is pivotally arranged on the drafting unit about at least one pivot axis, characterized by at least one cylinder unit which is connected to the drafting unit and the spinning unit and has a lifting cylinder, wherein the cylinder unit is designed such that the spinning unit is pivoted by means of the lifting cylinder from a spinning position to a position pivoted away from the drafting unit and the spinning unit can be pivoted by means of the lifting cylinder from the position pivoted away back to the spinning position and held in the spinning position.

Description

[0001] This invention relates to a spinning station comprising a drafting unit and a spinning unit for producing yarn or roving from a supplied fiber sliver, wherein the spinning unit is pivotally arranged on the drafting unit about at least one pivot axis. The invention also provides an air-jet spinning machine having multiple spinning stations for producing multiple yarns or rovings from a supplied fiber sliver, and a method for operating a spinning station having a drafting unit and a spinning unit for producing yarn or roving from a supplied fiber sliver.

[0002] Spinning machines typically have multiple spinning stations, each of which spins the supplied fiber sliver into yarn or roving.

[0003] The drafting unit is an important component of the spinning station. It is used to uniformly stretch and draw the fiber sliver to the desired yarn fineness before it reaches the spinning unit. Especially in air-jet spinning machines, high-performance drafting units or roller drafting units are commonly used, where the fiber sliver is drafted through several pairs of rollers. After exiting the output roller pair of the drafting unit, which consists of an upper output roller and a lower output roller, the stretched fiber sliver is then fed to the spinning unit.

[0004] Then, in the spinning unit, the stretched fiber sliver is spun into yarn or roving during the spinning process. For example, in the spinning unit of an air-jet spinning machine, this can be an air-jet spinning process. In air-jet spinning, special air-jet spinning nozzles are used, which act on the stretched fiber sliver to cause the sheath fibers to rotate. These air-jet spinning nozzles, also known as vortex nozzles, generate vortices of compressed air that form a fixed sheath around the fiber core composed of rotating fibers.

[0005] To remove dirt and to allow for maintenance and access during splicing, it is necessary to have external access to the transition area between the drafting unit and the spinning unit. To make this transition area accessible from the outside, the spinning station typically has a spinning unit that is pivotally arranged on the drafting unit about a pivot axis.

[0006] To enable the spinning unit to pivot, the drafting unit of such a spinning station typically has a short lifting cylinder. This short lifting cylinder extends from the drafting unit and presses against the spinning unit in such a way that it pushes the spinning unit away from the drafting unit in certain areas. The spinning unit then pivots about the pivot axis to a position away from the pivot, making the transition area between the drafting unit and the spinning unit accessible from the outside. In this position, cleaning, maintenance, splicing, and / or replacement of components of the spinning unit can be performed.

[0007] To pivot the spinning unit back from its pivoted position to the drafting unit, so that the spinning unit rests against the drafting unit and occupies its spinning position, in which it can receive the stretched fiber sliver from the drafting unit for spinning into yarn or roving, in known systems, an independent tension spring acting parallel to the short lifting cylinder is arranged between the drafting and spinning units. This tension spring is tensioned by the pivoting of the spinning unit and pulled back to the drafting unit when the short lifting cylinder is no longer acting on it. The tension spring is designed to be suspended rather than fixed to allow for the removal of the spinning unit.

[0008] A major drawback of these known spinning stations is their complexity and maintenance intensity, as the tension springs are susceptible to unavoidable contamination during operation, and several parts are used to perform simple movements. In this situation, dirt can cause mechanical blockage of the tension springs, which significantly impairs the efficiency and productivity of the spinning station. Furthermore, the short lifting cylinders are expensive, negatively impacting cost efficiency in manufacturing and operating costs during the use of the spinning station.

[0009] The purpose of this invention is to provide a spinning station that is easier to operate and maintain.

[0010] In the aforementioned type of spinning station, this objective is achieved through the fact that the spinning station includes at least one cylinder unit connected to the drafting unit and the spinning unit, and has a lifting cylinder. The cylinder unit is designed such that the spinning unit pivots relative to the drafting unit from a spinning position to a position pivoting away from the drafting unit by means of the lifting cylinder, and the spinning unit can pivot back from the pivoted position to the spinning position and remain in the spinning position by means of the lifting cylinder. In this way, the pivoting of the spinning unit, i.e., its pivoting away from the drafting unit, and the positioning of the spinning unit, i.e., its pivoting back to the drafting unit and entering the spinning position, can be achieved by means of the cylinder unit, and thus by means of a single unit. This reduces mechanical wear and improves reliability. A separate tension spring can be eliminated, thereby reducing complexity and maintenance intensity. Therefore, integrating these functions into a single unit reduces wear and simplifies maintenance.

[0011] The cylinder unit can be arranged between the drafting unit and the spinning unit in such a way that it acts directly between them. For this purpose, the cylinder unit, particularly the lifting cylinder, can be connected to both the drafting and spinning units via one of its diameter ends. In this configuration, the lifting cylinder can achieve the pivoting movement of the spinning unit by pushing it away from or pulling it towards the drafting unit.

[0012] The drafting unit may have a lower output roller and a support structure. The support structure, particularly the lower roller bracket, can be used to house the lower output roller and / or other rollers of the drafting unit. The spinning unit can be arranged on the support structure in a manner that allows it to pivot about a pivot axis.

[0013] The pivot axis can be transverse to, and in particular orthogonal to, the rotation axis of the lower output roller of the drafting unit.

[0014] In another embodiment of the invention, the lifting cylinder is mounted on the spinning unit, particularly on the retaining plate of the spinning unit. This allows force to be directly transmitted to the spinning unit. Similarly, the lifting cylinder can be stably secured to the spinning unit, particularly via the retaining plate. In this way, more precise and reliable pivoting and positioning of the spinning unit can be achieved. Furthermore, by transmitting force via the retaining plate to the strong and resistant areas of the spinning unit, mechanical stress on other components of the spinning station can be reduced, which can increase the lifespan of the spinning unit.

[0015] Preferably, the lifting cylinder can be pneumatically operated. Therefore, the lifting cylinder and cylinder unit can be integrated into the existing compressed air system of the spinning station. This provides a cost-effective solution because no additional energy is required. Furthermore, the system's response speed can be improved.

[0016] In the preferred design, the lifting cylinder is a pneumatic cylinder. Pneumatic cylinders can be easily integrated into the compressed air system of spinning stations and / or air-jet spinning machines. In this way, the additional energy supply for driving the lifting cylinder can be eliminated.

[0017] The lifting cylinder can have a retracted rest position, which it automatically occupies when not actively operated. In this way, as long as the lifting cylinder is not actively actuated to move the spinning unit to a pivot-away position, it can be ensured that the spinning unit always remains in the spinning position. This increases safety because unwanted movement of the spinning unit away from the drafting unit and the spinning position can be avoided.

[0018] In this regard, it is preferable if the lifting cylinder has an internal return spring. With the aid of the internal return spring, the lifting cylinder can automatically return to its retracted rest position. In this case, the return spring can be permanently preloaded in the direction of the rest position, or it can be preloaded when the lifting cylinder is actuated. Automatic return to the rest position provides greater operational safety and reduces the risk of failure.

[0019] According to the preferred design, the spinning unit has a stop element that abuts against the drafting unit at the spinning position. This makes it possible to maintain a reproducible position of the spinning unit relative to the drafting unit at the spinning position. Therefore, the accuracy and reproducibility of yarn manufacturing can be improved. The stop element also ensures that the spinning unit does not slip during operation, which can improve product quality.

[0020] The stop element can be spaced apart from the cylinder unit along the pivot axis to further increase the mechanical stability of the spinning unit that rests against the drafting unit at the spinning position.

[0021] The cylinder unit is preferably equipped with a tool-free release closure, particularly a bayonet closure, for connecting the lifting cylinder to the drafting unit. This allows for quick and easy installation and removal of the spinning unit, thus greatly simplifying maintenance. The tool-free release closure allows for release of the connection without tools, increasing the flexibility of the handling unit. The bayonet closure also provides a safe and stable connection, maintaining a reliable seal even during intensive operation of the spinning station.

[0022] In one embodiment of the invention, the closure includes a first closure portion located on the side of the lifting cylinder and a second closure portion disposed on the drafting unit, the first and second closure portions being optionally separable from each other. This allows for easy release of the connection when needed, while ensuring a reliable and load-bearing connection between the cylinder unit and the drafting unit in the connected state. In this way, releasing the closure and replacing the spinning unit can be simplified. When releasing the closure, the second closure portion can remain on the drafting unit, while the first closure portion can be completely released from the drafting unit along with the cylinder unit and the rest of the spinning unit for, for example, replacement.

[0023] According to one embodiment of the invention, the lifting cylinder is connected to the first enclosure portion via a coupling element, particularly a cylindrical one. In this way, the lifting cylinder can be easily and detachably connected to a second enclosure portion arranged on the drawing device side via the coupling element and the first enclosure portion. This facilitates the assembly and disassembly of the cylinder unit.

[0024] The coupling element can form an integral structural unit with the first enclosure portion. By forming the coupling element and the first enclosure portion into an integral structural unit, they can no longer be separated from each other, thereby further increasing the stability of the connection.

[0025] Furthermore, preferably, the coupling element and the first closure portion are formed as a single unit. This construction method reduces weak points in the structure, resulting in higher stability and reliability of the connection. Integrated manufacturing reduces manufacturing costs and improves fitting precision.

[0026] According to a structural design scheme, it is recommended that the coupling element be made of plastic, particularly injection molded. This makes manufacturing cost-effective and easy. In particular, it allows for high precision while achieving lower production costs. Plastic parts are also corrosion-resistant, increasing service life and reducing maintenance costs. Manufacturing the coupling element from plastic materials is possible because when the spinning unit is pivoted and positioned, only a small force must be transmitted via the coupling element and the first closure section to the second closure section and the drafting unit located on the drafting device side.

[0027] In a preferred design, the spinning unit has suction nozzles specifically positioned in the inlet region of the airflow spinning nozzles of the spinning unit. This allows for the suction of yarn during the splicing process. The suction nozzles help avoid interference from yarn residue, improving the efficiency of the spinning process. The suction device can be positioned below the drafting plane of the fiber sliver extending between the lower and upper output rollers of the drafting unit to maximize the effectiveness of the suction.

[0028] In order to solve the above problems, it is recommended to design at least one spinning station in the manner described above in the above-described manner, which combines the advantages described for spinning stations.

[0029] In the method of the type mentioned at the beginning, to address the aforementioned problems, it is suggested that the method include the following steps: the spinning unit pivots relative to the drafting unit about at least one pivot axis from a spinning position to a position pivoting away from the drafting unit by means of a cylinder unit having a lifting cylinder; at least one splicing and / or cleaning step is performed; the spinning unit is pivoted back from the pivoted away position to the spinning position by means of the lifting cylinder; and during spinning, the spinning unit is held in the spinning position by means of the lifting cylinder. This method allows the spinning unit to be positioned effectively and flexibly during operation, thereby improving the productivity and quality of the manufactured yarn or roving.

[0030] The features described in conjunction with the spinning station and / or air-jet spinning machine according to the invention can also be used alone or in combination in this method, achieving the same advantages as already described.

[0031] Furthermore, the cylinder unit can be provided to transmit the forces required for pivoting and returning along the same axis. In this way, the effects of different forces during pivoting from the spinning position to a position away from the pivot and back to the spinning position can be avoided. Bending moments can be avoided. Stress on components can be minimized, extending the service life of the spinning station.

[0032] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings, wherein the embodiments are illustrative and exemplary:

[0033] Figure 1A spinning station according to the prior art is shown;

[0034] Figure 2 shows left and right side views of the spinning station according to the present invention; and

[0035] Figure 3 A plan view of a spinning station according to the invention is shown in Figure 2.

[0036] The same reference numerals are used for elements, parts and structures that have the same function and / or the same type.

[0037] Figure 1 Details of a spinning station 100 according to the prior art, used in a typical spinning machine, are shown. This spinning station 100 includes the basic components required to produce yarn or roving from a supplied sliver of fiber. Specifically, it includes a drafting unit 2 (not shown) that draws the sliver of fiber into the spinning station 100 and a spinning unit 6 that spins the drawn sliver of fiber into yarn or roving. Figure 1 In the figure, spinning unit 6 and other spinning units in the figure are designed as air-jet spinning units.

[0038] In the transition region between drafting unit 2 and spinning unit 6, spinning unit 6 can pivot away from drafting unit 2. In this case, Figure 1 In the diagram, spinning unit 6 pivots counterclockwise, so that it is no longer flush with drafting unit 2, but only in the region of the pivot axis.

[0039] In this configuration, the drafting unit 2 has a short lifting cylinder 200 mounted on its support structure. The short lifting cylinder 200 is used to push the spinning unit 6 away from the drafting unit 2, making the transition area between these units accessible. This is important for maintenance and cleaning.

[0040] This is achieved by extending the short lifting cylinder 200 and pressing it against the stop 300 integrated in the spinning unit 6. In this case, the short lifting cylinder 200 rests only against the stop 300 and is neither connected to the stop nor to the spinning unit 6. Therefore, if the short lifting cylinder 200 retracts again, the spinning unit 6 initially remains in the pivoted, away position.

[0041] A tension spring 400 is also installed between the drafting unit 2 and the spinning unit 6. When the spinning unit 6 pivots to a pivot-away position (not shown), the tension spring 400 is tensioned. When the short lifting cylinder 200 retracts, it ensures that the spinning unit 6 returns to its original spinning position.

[0042] Figure 1The arrangement shown does indeed make the transition area between the drafting unit 2 and the spinning unit 6 accessible, which is essential for cleaning and maintenance. However, this function is mechanically complex because it requires a short lifting cylinder 200 and a tension spring 400 to achieve the desired movement.

[0043] This increases the complexity and maintenance intensity of the existing spinning station 100, as multiple components susceptible to contamination and mechanical blockage must be used. Furthermore, the short lifting cylinder 200 is an expensive component, which impairs the economic efficiency of the spinning station 100.

[0044] Furthermore, the short lifting cylinder 200 and the tension spring 400 are transversely spaced from each other along the pivot axis A. Therefore, they apply forces to the spinning unit 6 and the drafting unit 2 along different axes. Thus, when the spinning unit 6 pivots from the drafting unit 2 via the short lifting cylinder 200, the force acts along a different axis than during the spinning unit's positioning, i.e., when it pivots back to the spinning position at the drafting unit 2 via the tension spring 400. This results in uneven stress and may introduce bending moments, which, in the long run, could lead to mechanical damage to the connection between the spinning unit 6 and the drafting unit 2.

[0045] Figure 2a and Figure 2b A preferred embodiment of the spinning station 1 according to the invention is shown in partial side views, one being a left-side view and the other a right-side view. Figure 2 shows only a portion of the spinning station 1. The drafting unit 2 and the spinning unit 6 can be seen.

[0046] The drawing unit 2 is used to prepare the yarn by uniformly stretching the fiber strip to achieve the desired yarn fineness.

[0047] Figure 2a The lower roller bracket 3, a component of the drafting unit 2, is shown. The lower roller bracket 3 serves as a support structure, housing and rotatably supporting the various rollers of the drafting unit 2. Its robust structure ensures that the rollers remain precisely aligned during operation, which is crucial for the uniform processing of the fiber sliver. The design of the lower roller bracket 3 effectively disperses the mechanical stress generated during the stretching process, thereby extending the service life of the entire unit.

[0048] In the roller pair of drafting unit 2, only a few bottom rollers, also known as lower rollers, are shown in the figure. The drafting plane of the fiber sliver extends above these lower rollers and below the upper rollers (not shown) in drafting unit 2. In this drafting plane, the fiber sliver passes through and is stretched by the roller pair. Figure 2a In the middle, the fiber strip passes through the stretching unit 2 from right to left.

[0049] The lower drafting roller 5 is another component of the drafting unit 2, such as... Figure 2aAs shown. This roller, together with other roller pairs, helps to refine and homogenize the fiber sliver by guiding it through the drafting unit. The lower drafting roller 5 can be designed to apply uniform pressure to the fiber sliver, thereby carefully aligning and stretching the fibers to the desired fineness. Its positioning and function in conjunction with the lower roller support 3 ensure that the fiber sliver is optimally prepared for transition to the spinning unit 6.

[0050] The lower output roller 4 is located at the end of the drafting unit 2 facing the spinning unit 6. Together with the upper output roller (not shown), it forms an output roller pair that guides the fiber sliver out of the drafting unit 2 after the stretching operation. The lower output roller 4 is specifically designed to deliver the stretched fiber sliver at a constant speed and uniform tension, providing an optimal foundation for subsequent spinning processes. Its precise support and connection with the lower roller support 3 ensures high operational reliability and accuracy.

[0051] Spinning unit 6 is adjacent to drafting unit 2. Spinning unit 6 is shown in its spinning position, where it is substantially flush with drafting unit 2. This spinning unit does not pivot about pivot axis A, which is located in the transition region between spinning unit 6 and drafting unit 2.

[0052] The spinning unit 6 is pivotally arranged on the drafting unit 2 about a pivot axis A, which allows the spinning unit 6 to pivot away from the drafting unit 2 for maintenance and / or cleaning. Figure 2a In the diagram, the spinning unit 6 pivots counterclockwise along the pivoting motion S shown, so that it is no longer flush with the drafting unit 2, but only in the region of the pivoting axis A.

[0053] Spinning unit 6 receives the stretched fiber sliver from drafting unit 2 in its inlet region 8. As shown in the illustrated embodiment, spinning unit 6 can be configured as an air-jet spinning unit. It then includes an air-jet spinning nozzle 7, which rotates the stretched fiber sliver by airflow, thereby forming a sheath of rotating fibers around a fiber core. Through this step, the desired strength of the yarn or roving is obtained.

[0054] Furthermore, the suction nozzle 9 is arranged in the inlet region 8 of the airflow spinning nozzle 7. This helps to remove yarn residue and avoid interference during the spinning process. When the spinning unit 6 pivots, the suction nozzle 9 can also pivot, so that, especially in steps that occur when the spinning unit 6 is in a pivoted and away position, fiber slivers can be drawn out in the region of the lower output roller 4 during splicing.

[0055] like Figure 2b As shown, the end of the suction nozzle 9 can be arranged in such a way that it is positioned below the drafting plane of the fiber sliver at the spinning position of the spinning unit 6. Therefore, even during the spinning process, the suction nozzle 9 can suction out loose fiber sliver residue and counteract contamination of the spinning unit 6.

[0056] Both the airflow spinning nozzle 7 and the suction nozzle 9 are mounted on the base bracket 10 of the spinning unit 6. This base bracket 10 can serve as a stable base for the entire spinning unit 6, especially in… Figure 3 As can be seen, the base bracket ensures that all components of the spinning unit 6 are securely and firmly assembled, improving the precision and reliability of the spinning station 1. The base bracket 10 is designed to evenly distribute the stresses that occur during operation, thereby increasing the service life of the spinning station 1.

[0057] In this configuration, the base bracket 10 can be pivotally arranged on the lower roller bracket 3 of the drafting unit 2 about the pivot axis A. By pivoting the base bracket 10, the entire spinning unit 6, particularly the air-flow spinning nozzle 7 and / or the suction nozzle 9, can pivot about the pivot axis A in this manner.

[0058] The central element that distinguishes the spinning station 1 according to the invention from the prior art is the cylinder unit 11. This cylinder unit is connected to the drafting unit 2 and the spinning unit 6. In this way, the cylinder unit 11 can be effectively connected between the spinning unit 6 and the drafting unit 2. This configuration allows the spinning unit 6 to be moved from the spinning position shown in the figure to a pivoted, away position and back by means of the cylinder unit 11.

[0059] Cylinder unit 11 includes lifting cylinder 12. (See Figure 2 and...) Figure 3 As shown, the lifting cylinder 12 can be pneumatically operated and is configured as a pneumatic cylinder. This lifting cylinder 12 can be economically and efficiently integrated into the existing compressed air system of the spinning station 1 or the air-jet spinning machine, eliminating the need to reserve a separate drive source for the cylinder unit 11, particularly the lifting cylinder 12.

[0060] When the lifting cylinder 12 is activated, it moves along its longitudinal axis L in the direction of the drafting unit 2. This causes the cylinder unit 11, connected to the spinning unit 6 and the drafting unit 2, to push the spinning unit 6 away from the drafting unit 2. The spinning unit 6 then pivots about the pivot axis A in a pivoting motion S, such that the airflow spinning nozzle 7 is spaced apart from the drafting unit 2, and allows external access to the inlet area 8. In this pivoted, away position, the drafting unit 2 and the spinning unit 6 can be cleaned and / or one or more splicing steps can be performed.

[0061] To pivot the spinning unit 6 back to the spinning position, the lifting cylinder 12 is pulled in. This reduces the length of the cylinder unit 11 along the longitudinal axis L. However, since the cylinder unit 11 is connected to both the drafting unit 2 and the spinning unit 6, the spinning unit 6 can then pivot back to the spinning position without the need for a tension spring separate from the cylinder unit 11. This reduces the number of parts required for pivoting and the associated wear. Furthermore, this simplifies the maintenance of the spinning station 1.

[0062] In the spinning station 1 according to the invention, force transmission between the drafting unit 2 and the spinning unit 6 can occur when the spinning unit 6 pivots from the spinning position to the pivot-away position, and when the spinning unit 6 pivots back to the spinning position from the pivot-away position along the same axis, particularly along the longitudinal axis L of the lifting cylinder 12. This prevents the occurrence of bending moments.

[0063] Since the cylinder unit 11 is connected to the drafting unit 2 and the spinning unit 6, as long as the lifting cylinder 12 is not actively actuated, i.e. extended, it can also stably hold the spinning unit 6 in the spinning position by means of the lifting cylinder 12.

[0064] As shown in the embodiment, the lifting cylinder 12 can be configured such that it has an automatically occupied retracted rest position. In this way, the spinning station 1 can be in the normal position, with the lifting cylinder 12 in the rest position, holding the spinning unit 6 in the spinning position. Therefore, if the cylinder unit 11 is not actively actuated, the spinning unit 6 will remain in the spinning position. In particular, this can be achieved by the lifting cylinder 12 having an internal return spring, which is not shown in the figure, and which automatically moves the lifting cylinder 12 to the retracted rest position if it is not actively actuated.

[0065] The spinning unit 6 has a retaining plate 13 for fastening the cylinder unit 11. The lifting cylinder 12 is fastened to the retaining plate 13. Through the retaining plate 13, force can be transmitted directly from the lifting cylinder 12 to the spinning unit 6 so as to pivot the spinning unit 6.

[0066] The arrangement of the device according to the invention shown in the figure enables more efficient and easier-to-maintain operation of the spinning station 1. By integrating the pivoting and positioning functions into the cylinder unit 11, additional components such as tension springs can be eliminated. This can significantly reduce the complexity and maintenance intensity of the spinning station.

[0067] Figure 2a and Figure 3 A stop element 18 is shown for the spinning unit 6, which abuts against the drafting unit 2 at the spinning position. The stop element 18 can help to repeatably and stably position the spinning unit 6 on the drafting unit 2.

[0068] like Figure 3As shown, the stop element 18 can be offset along the pivot axis A, specifically parallel to the cylinder unit 11. This positioning allows the spinning unit 6 to rest securely and stably against another point on the drafting unit 2 when it is in its spinning position. In this way, the stop element 18 helps ensure that the spinning unit 6 does not slip during operation of the spinning station 1, which improves product quality and minimizes mechanical stress.

[0069] The following will refer to Figure 3 The structure and arrangement of the components are further described in the plan view of the spinning station 1 according to the present invention.

[0070] This view clearly shows the spinning unit 6 in the spinning position relative to the drafting unit 2. The inlet region 8 is arranged in such a way that it can directly receive the stretched fiber sliver from the lower output roller 4 and guide it into the airflow spinning nozzle 7, where the fiber sliver is then spun into yarn or roving.

[0071] The retaining plate 13, which securely fastens the lifting cylinder 12 to the spinning unit 6, is clearly visible. In this design, the retaining plate 13 is L-shaped and is mounted on the base bracket 10 of the spinning unit 6. This structure allows force to be transmitted directly from the lifting cylinder 12 to the base bracket 10 via the retaining plate 13, which improves the stability of the entire unit. Most of the retaining plate 13 extends parallel to the longitudinal axis L of the lifting cylinder 12.

[0072] At the other end, the lifting cylinder 12 is connected to the coupling element 17 of the cylinder unit 11.

[0073] The coupling element 17, which serves as the connection between the lifting cylinder 12 and the closure 14, is also visible. This cylindrical coupling element 17 is designed to reinforce the connection structure and extend the lifting cylinder 12.

[0074] The coupling element 17 connects the lifting cylinder 12 to the closure 14. In this case, it ensures a smooth transmission of force between the lifting cylinder 12 and the first closure portion 15. To save unnecessary weight and material costs, the coupling element 17 can be made of plastic.

[0075] The tool-free releasable closure 14 of the cylinder unit 11 connects it, along with the lifting cylinder 12 arranged on the spinning unit side, to the drafting unit 2. In this case, the closure 14 allows for easy connection and disconnection of the lifting cylinder 12 from the drafting unit 2.

[0076] The closure 14 includes a first closure portion 15 disposed on the coupling element 17 and a second closure portion 16 disposed on the drafting unit 2. These closure portions 15, 16 are optionally detachable from each other, which makes it possible to replace the spinning unit 6. In this case, the optional detachable connection allows the lifting cylinder 12 to be quickly and tool-free decoupled from the drafting unit 2.

[0077] In Figure 2 to Figure 3 In the specific embodiment shown, the closure 14 is configured as a bayonet closure. In this case of a bayonet closure 14, the two closure portions 15, 16 are provided with bayonet connecting elements. In this case, the second closure portion 16 may have, for example, a nose-like protrusion through which it can be inserted into a groove in the first closure portion 15. By rotating the first closure portion 15 relative to the second closure portion 16, the two closure portions 15, 16 can be fastened to each other without tools. Similarly, the two closure portions 15, 16 can also be separated from each other without tools to open the closure 14. However, the closure 14 can also be configured as another type of releasable closure 14.

[0078] To replace the spinning unit 6, the closure 14 can be released, and then the spinning unit 6 can be pulled out of the drafting unit 2 along the pivot axis A. In this case, only the second closure portion 16 remains on the drafting unit 2, while the remaining components of the cylinder unit 11 are removed along with the spinning unit 6. The ability to quickly and easily assemble and disassemble the spinning unit 6 contributes to the flexibility and efficiency of the entire spinning process. In this way, defective spinning units 6 can be quickly replaced without the need for tool insertion.

[0079] As shown in the design, the coupling element 17 and the first enclosure portion 15 can be formed as a single unit. This provides additional stability and prevents the coupling element 17 from separating from the first enclosure portion 15 during operation.

[0080] Since the coupling element 17 is made of plastic, preferably by injection molding, the first closure portion 15 integrally formed therewith is also made of plastic.

[0081] The coupling element 17 and the first closure portion 15 can be manufactured as continuous elements in a common injection molding process. This allows for precise manufacturing and corrosion resistance, thereby extending the service life of the connection and reducing maintenance costs.

[0082] In the same way, the second closure portion 16 can also be made of plastic, especially injection molded.

[0083] A significant advantage of the structure of the spinning station 1 and the air-jet spinning machine according to the invention is the reduction in complexity and maintenance intensity, as additional components such as the tension springs required to date can be eliminated. The use of the pneumatic lifting cylinder 12 enables precise control and positioning of the spinning unit 6, which improves reproducibility.

[0084] The word "may" specifically indicates an optional feature of the invention. Therefore, there are also several improvements and / or embodiments of the invention that supplement or alternatively have the aforementioned corresponding features.

[0085] If necessary, isolated features may also be extracted from the combination of features disclosed herein, and these features may be decoupled from any structural and / or functional associations, and combined with other features to define the subject matter of the claims.

[0086] List of reference numerals

[0087] 1 Spinning Station

[0088] 2 drawing units

[0089] 3 Lower Roller Supports

[0090] 4 lower output rollers

[0091] 5 Lower drawing rolls

[0092] 6 spinning units

[0093] 7. Airflow spinning nozzle

[0094] 8 entrance areas

[0095] 9 suction nozzles

[0096] 10 base brackets

[0097] 11-cylinder unit

[0098] 12 lifting cylinders

[0099] 13 retaining plate

[0100] 14 closures

[0101] 15 First sealing part

[0102] 16 Second sealing part

[0103] 17 Coupling Elements

[0104] 18 Stopping elements

[0105] 100 Spinning Station

[0106] 200 lifting cylinder

[0107] 300 blocks

[0108] 400 tension spring

[0109] A pivot axis

[0110] S pivoting motion

[0111] L longitudinal axis

Claims

1. A spinning station (1) comprising a drafting unit (2) and a spinning unit (6) for producing yarn or roving from a supplied fiber sliver, wherein, The spinning unit (6) is pivotally arranged on the drafting unit (2) about at least one pivot axis (A), characterized in that at least one cylinder unit (11) is connected to the drafting unit (2) and the spinning unit (6) and has a lifting cylinder (12), wherein the cylinder unit (11) is designed such that the spinning unit (6) pivots relative to the drafting unit (2) from a spinning position to a position pivoting away from the drafting unit (2) by means of the lifting cylinder (12), and the spinning unit (6) is able to pivot back to the spinning position from the pivoted position by means of the lifting cylinder (12) and remain in the spinning position.

2. The spinning station (1) according to claim 1, characterized in that, The lifting cylinder (12) is disposed on the spinning unit (6), and in particular on the retaining plate (13) of the spinning unit (6).

3. The spinning station (1) according to any one of claims 1 or 2, characterized in that, The lifting cylinder (12) is pneumatically operated.

4. The spinning station (1) according to any one of claims 1 to 3, characterized in that, The lifting cylinder (12) has a retracted rest position, which it automatically occupies when not actively operated.

5. The spinning station (1) according to claim 4, characterized in that, The lifting cylinder (12) has an internal return spring.

6. The spinning station (1) according to any one of claims 1 to 5, characterized in that, The spinning unit (6) has a stop element (18), and the spinning unit (6) abuts against the drafting unit (2) at the spinning position by means of the stop element.

7. The spinning station (1) according to any one of claims 1 to 6, characterized in that, The cylinder unit (11) includes a tool-free releasable closure (14), particularly a bayonet closure (14), for connecting the lifting cylinder (12) to the stretching unit (2).

8. The spinning station (1) according to claim 7, characterized in that, The closure (14) includes a first closure portion (15) located on the side of the lifting cylinder and a second closure portion (16) disposed on the stretching unit (2), the first closure portion and the second closure portion being optionally separable from each other.

9. The spinning station (1) according to claim 8, characterized in that, The lifting cylinder (12) is connected to the first enclosure portion (15) via a particularly cylindrical coupling element (17).

10. The spinning station (1) according to claim 9, characterized in that, The coupling element (17) and the first enclosure portion (15) are integrally formed with each other.

11. The spinning station (1) according to claim 10, characterized in that, The coupling element (17) is made of plastic, particularly injection molded.

12. The spinning station (1) according to any one of claims 1 to 11, characterized in that, The spinning unit (6) has a suction nozzle (9) which is specifically arranged in the inlet region (8) of the airflow spinning nozzle (7) of the spinning unit (6).

13. An air-jet spinning machine having multiple spinning stations (1) for producing multiple yarns or rovings from a supplied fiber sliver, characterized in that... At least one spinning station (1) according to any one of claims 1 to 12.

14. A method for operating a spinning station (1), the spinning station having a drafting unit (2) and a spinning unit (6) for producing yarn or roving from a supplied fiber sliver, the method comprising the steps of: - The spinning unit (6) pivots relative to the drafting unit (2) about at least one pivot axis (A) from the spinning position to a position pivoting away from the drafting unit (2) by means of a cylinder unit (11) having a lifting cylinder (12); - Perform at least one splicing and / or cleaning step; -The spinning unit (6) is pivoted back to the spinning position from the pivoted away position by means of the lifting cylinder (12); - During the spinning process, the spinning unit (6) is held in the spinning position by the lifting cylinder (12).

15. The method according to claim 14, characterized in that, The cylinder unit (11) transmits the force required for pivoting and rewinding along the same axis (L).

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