Load carrier and drafting device

Abstract

The invention relates to a load carrier for an upper roller of a drafting device of a textile machine, comprising at least one support with a carrier for accommodating at least one upper roller. In order to improve the operation of the drafting device and the corresponding spinning machine, a spring is provided, which is arranged in at least one support and is configured to act on the upper roller in a defined manner in a contact direction of the upper roller away from the load carrier after being arranged on the carrier, the contact direction is a direction in which the upper roller is arranged to be in contact with an assigned lower roller of the drafting device by means of pressure contact for sliver transport, and wherein the carrier and the support are connected to each other by means of a rotary joint so that the upper roller can be moved depending on the load of the spring.

Description

[0001] This invention relates to a load carrier. This invention also relates to a stretching device.

[0002] Drafting devices are known from the prior art. Document WO 2017 / 191515 A1 describes, for example, a drafting device for a textile machine, wherein the drafting device includes at least one roller and at least one corresponding mating roller, between which a fiber sliver can be clamped and guided. Each roller and mating roller has a roller body and a rotation axis, wherein the rotation axis of the roller and / or mating roller is supported only on one side. The roller can be movably supported between a rest position and a loaded position, in which the roller bodies of the roller and mating roller do not contact each other, and in the loaded position, the roller bodies of the roller and mating roller are pressed together. When transitioning from the rest position to the loaded position, the roller can move to an intermediate position in which the roller bodies of the roller and mating roller only contact each other. In this case, it is recommended that the rotation axes of the roller and mating roller be aligned relative to each other in the intermediate position, such that the roller bodies of the roller and mating roller have a common contact area, which, viewed axially from the rotation axis of the roller, is smaller than the contact area in the loaded position. The proposed structure is considered unsatisfactory, especially considering the operation of the drawing device, particularly during maintenance and / or, for example, during changes from one type of fiber strip to another.

[0003] Therefore, a particular object of the present invention is to improve the operation of the drafting device, thereby also improving the operation of the corresponding spinning machine.

[0004] This objective is achieved by a load carrier having the features of claim 1. This objective is achieved by a drawing device having the features of claim 21.

[0005] Further features and details are derived from the dependent claims, the specification, and the drawings. In this case, the features and details described in conjunction with the load carrier also apply to the textile machine, its use, and the method. This is also the reverse in each case, such that disclosures concerning various aspects always refer to or may refer to each other. Advantageous embodiments are the subject of the dependent claims.

[0006] According to one aspect, this objective is achieved in particular by a load carrier having the features of claim 1.

[0007] In the context of this invention, the rollers of the drafting device according to the preferred embodiment are hereinafter understood as upper rollers, which are arranged on a load carrier. The mating rollers of the drafting device, assigned to the rollers to form a pair of rollers in the drafting device, are understood as lower rollers. Thus, in a cross-sectional view of the drafting device along the fiber transport direction, the upper roller appears to be arranged above the pair of rollers in perspective, and the lower roller appears to be arranged below it in perspective. The lower rollers can preferably be arranged in a conventional manner on the lower roller carrier of the drafting device or textile machine.

[0008] According to the invention, a spring is arranged in at least one support and constructed in such a way that, after the roller is placed on the carrier, the position of the roller is loaded in a defined manner in a contact direction away from the load carrier, wherein the contact direction is the direction in which the roller is configured to contact the assigned mating roller of the drafting device for fiber sliver transport by means of pressure contact. Therefore, loading can be performed between the roller and the mating roller, for example for drafting, without having to provide a correspondingly complex and / or expensive structure. This further simplifies the process and reduces resource consumption.

[0009] The term "spring" specifically refers to a load-bearing component designed to generate a specific load between a roller and a mating roller, particularly under the load of a drafting device, where the textile machine can stretch a sliver for spinning from the stretched sliver, splicing via a defined sliver feed device, or perform other operations of the textile machine. This load helps to stretch and / or stabilize the sliver to achieve the desired production parameters of the manufacturing process to be performed by the textile machine. As described herein, springs can be suitably arranged and configured to provide a defined force in a specific direction to limit the load between the roller and the mating roller.

[0010] According to a preferred embodiment, the support can be provided with a spring retainer having at least two tension positions for adjusting the load on the roller cooperating with the spring. Therefore, a simpler and less-maintained mechanical structure can be provided, thereby improving processing.

[0011] Spring retainers are structures, components, and / or assemblies specifically designed to accommodate and secure springs to allow for specific loads. Regarding load carriers, spring retainers can be used to hold springs that apply compressive forces on rollers and through which these compressive forces are applied to assigned mating rollers.

[0012] The tensioning position of the spring, particularly its specific arrangement or configuration on / in the spring retainer, allows the spring to be tensioned so as to apply a specific load, i.e., a compressive force, associated with the clamping force to the mating roller via the thus-tensioned roller. These tensioning positions are preferably selected such that, at the selected tensioning positions, a defined clamping force is generated, assigned to these tensioning positions, to warp or stabilize the fiber sliver in the drafting device as needed, such as for use in a particular manufacturing process. Each clamping position can be assigned a separate clamping force; that is, the clamping forces at each clamping position are preferably different from each other.

[0013] Adjusting the load specifically involves adjusting the clamping force on the clamping line between the adjusting roller and the mating roller to apply the load as needed. This can be achieved by selecting a tensioned position of the spring so that the required force can be transmitted to the mating roller. Precise load setting allows for improved processing of the fiber sliver and avoids potential damage or (incorrect / understretched) tension.

[0014] According to a preferred aspect, the load carrier can have a torsion spring as a spring, wherein one spring arm of the torsion spring can be set between at least two tension positions for tool-free adjustment, and wherein the other spring arm is arranged to introduce spring force onto the carrier, particularly directly. The torsion spring can be adjusted between the tension positions as described above, particularly without tools (i.e., particularly reversibly manufactured back and forth). As a result, operation can be improved, especially because variations in load (and therefore variations in contact pressure between the roller and the mating roller) can be easily accommodated. Alternatively or additionally, the spring can be constructed and arranged as a compression spring to apply compressive force onto the carrier, particularly directly. Therefore, friction points and tolerance effects can be minimized.

[0015] A torsion spring, also known as a torsion spring or leg spring, is a spring capable of rotational movement and adjustable between at least two tension positions. In this case, the torsion spring may preferably have a spring body, such as a helical spring, from which two spring arms or legs can be removed. In the case of a load carrier, the torsion spring can be used as a spring to create a defined load between the roller and the mating roller, particularly depending on the selected tension position.

[0016] According to a preferred embodiment, the support has spring arm supports. The spring arm supports are preferably connected to or integrally formed with the spring retainer. More preferably, the spring retainer with the spring arm supports is integrally formed with the support. The spring arm supports are particularly cavitary components in which at least two, particularly three, and further particularly several supports for the spring arms of the torsion spring can be formed. These supports allow the spring arms of the torsion spring to be adjusted between tension positions assigned to the respective supports. In this case, one spring arm is specifically rotated to a position relative to the main spring body, while another spring arm interacts with a portion of the carrier, for example by engagement or support, so as to load the carrier according to the selected tension position and the resulting tension force, thereby enabling the carrier to be loaded with compressive force to load or press the roller onto the assigned mating roller.

[0017] The spring arm support is specifically parallel to the track arrangement described elsewhere so that the latter can be correspondingly positioned by a calibrator. This enables precise positioning of the torsion spring, particularly in the step of positioning the support relative to the first and second reference structures, thereby improving load adjustment between the roller and the mating roller.

[0018] By using torsion springs as the spring, the operation of the load carrier can be improved because load variations can be easily adapted without the need for special auxiliary devices such as tools. In this case, the torsion spring can be adjusted between clamping positions without tools. This also simplifies operation and reduces the cost of maintenance or roller replacement.

[0019] Alternatively, a compression spring can be provided as the spring. In this case, the compression spring is specifically configured to generate spring compression force in a linear direction, which extends particularly parallel to and coincides with the main expansion direction of the compression spring, thereby pre-tensioning the assigned roller. Specifically, this can be achieved by the interaction of the compression spring with the assigned carrier of the roller via a spring plunger, thereby transmitting pressure to the roller, which is movably (slidably) supported in the tensioning direction. This pressure can be compensated by interaction with a mating structure such as a belt or a mating roller, for example, in the assembled state of the drafting device and the load carrier, where, in this case, the pressure on the fiber strip to be stretched can be increased.

[0020] In a preferred embodiment, the compression spring can be provided in different positions pre-tensioned within a spring retainer, which specifically includes at least one support, to increase, for example, the spring tension to be transmitted to the fiber strip. For this purpose, the compression spring can be configured, for example, as a helical spring, which can be compressed in its main expansion direction. The compression spring can be pre-tensioned accordingly by means of a spring housing of a spring retainer, preferably disposed on at least one support and in which the compression spring body is arranged, having at least two recesses that can be arranged at different heights, wherein these recesses can be exceptionally connected in the spring housing to form, for example, an F-shape or an E-shape. In this case, the compression spring can have an upper portion or be connected to an upper portion, with a guide element protruding in such a way that it is guided in a groove. In this case, the compression spring can be displaced on the upper portion by a compression movement, resulting in the compression spring being compressed or released depending on the direction of displacement. By lateral movement relative to the insertion direction, the guide element can be pushed into the recess (which can also be a groove in the spring housing) to hold the compression spring in a pre-tensioned position. Each recess defines the tensioned position of the spring.

[0021] According to the invention, the carrier and the support are connected to each other via a rotary joint to move the upper roller according to the load of the spring. Therefore, contact pressure can be generated or transmitted accordingly between the roller and the assigned mating roller. Thus, in particular, it is possible to provide a material load that only requires introducing low to very low material loads into the load carrier material, as the rotary joint can transmit the motion accordingly. Therefore, adaptability to newly set loads can be improved when the fiber strip is changed.

[0022] Rotary joints are particularly important components of load carriers, supporting the carrier on supports for rotatable movement and allowing rollers to move relative to assigned mating rollers, depending on a load carried by a spring. Rotary joints enable roller positioning without introducing significant material loads into another component of the load carrier. Therefore, adaptability to newly set loads can be improved when the fiber strip is changed.

[0023] In a load-bearing carrier, material load occurs when the components of the load-bearing carrier must absorb forces to hold or move a roller in a desired position. Rotary joints can help reduce or avoid this material load because the transmission of motion and force can occur through the rotary joint. Therefore, the operation and durability of the load-bearing carrier can be improved.

[0024] According to a preferred embodiment, the load carrier can be further developed from the first and second reference structures, as described below. Therefore, operation can be improved and insertion of the fiber strip can be facilitated.

[0025] A first reference structure can be constructed and arranged on the load carrier, and a second reference structure can be constructed and arranged on at least one support. In this case, the first and second reference structures are constructed and arranged such that when at least one support is arranged near the first reference structure, the position of at least one support relative to the load carrier, and thus relative to the drawing device, defines the position of at least one support. This allows for more precise positioning and adjustment of the support position, thereby allowing for more precise positioning and adjustment of the upper roller position, since the removal of the load carrier can be avoided, resulting in further improvements in operation.

[0026] The term "reference structure" specifically refers to the contact surface or defined arrangement of the load carrier or support, which can be used to define the position and distance of the support for the roller relative to the first and second reference structures. Therefore, the first reference structure on the load carrier forms the starting point for positioning the roller in the drafting unit, enabling accurate and precise positioning of the support, thereby positioning the upper roller. In this case, it is particularly advantageous to avoid the need to remove the load carrier in order to set the spacing between the rollers of the drafting unit in a defined manner by means of a sliding scale or another (mechanical) measuring device.

[0027] In general, both the reference structure and the spring offer the possibility of improving the handling of the load carrier of the rollers in the drafting unit of a textile machine, as they allow for precise positioning and effective load distribution between the rollers and the mating rollers. In a preferred embodiment, the reference structure and the spring can be provided without corresponding other components, but they can also be complementary, especially when they are present simultaneously, because they allow for the application of an appropriate load at the correct spatial position in the drafting unit along the fiber sliver transport direction, enabling the setting of parameters for the manufacturing process, such as the fiber sliver used to manufacture yarn.

[0028] The roller can be, in particular, a circular body (cylinder, cone, especially a cut cone), which can be used in drafting devices to warp fiber slivers. The roller's structure particularly features a roller body with a rotational axis and may also include bearings at one or more locations, by means of which the roller can be rotatably arranged on a carrier, wherein the carrier is configured to arrange the roller on a load carrier. In this case, a support can be constructed and arranged to house at least a portion of the carrier containing the roller. This allows the roller to be arranged on a load carrier.

[0029] The load carrier can preferably be constructed and arranged to transfer it from an open state (e.g., maintenance state) to a closed state (e.g., force-applied state, such as a load state). To enter the maintenance state, the load carrier can or has been at least partially or completely moved to open the drafting device, allowing access to the mating rollers and the load carrier's rollers. In a preferred contact state that can be taken between the open and closed states, the drafting device can indeed be closed, but if necessary, the rollers and mating rollers only contact each other, i.e., specifically placed only on top of each other, not pressed together. This contact state is advantageous for checking the alignment of the rollers and mating rollers relative to each other. Furthermore, especially in the event of a workstation stop or machine stoppage, the upper roller can be protected, as it could potentially be harmfully pressed into the structure of the assigned lower roller in the loaded state. In particular, only in the loaded state (also known as the drafting state) can the forces required for the active operation of the textile machine be applied between the rollers and mating rollers to enable stretching in the drafting device. This loaded state can also be referred to as the operating state.

[0030] In the load carrier according to the preferred embodiment, the roller, and more preferably in the drafting device according to the preferred embodiment, the mating roller, can also be supported on both sides of the assigned support by two laterally projecting carriers (shafts), in other words, projecting laterally from the support. Alternatively, a continuous carrier or a continuous carrier shaft can be provided. In a preferred embodiment, rollers supported only on one side can also be provided, these rollers being guided on at least one bearing to rotate on their carrier with a rotation axis, wherein their carrier is received only on one side by the support of the load carrier. The rotation axis of the roller, also called the axis of rotation, is specifically arranged in such a way that it is collinear with the rotation axis of the roller body of the corresponding assigned mating roller. In other preferred embodiments, the rotation axes of the roller and the mating roller can be at an angle relative to each other, which can be selected in a defined manner according to the requirements of the fiber sliver to be transported and stretched.

[0031] When a fiber sliver in the loading position of the drafting device is guided between a roller and its mating roller, as is the case during drafting device operation, the respective rollers apply a compressive force to the fiber sliver in the form of a clamping force, wherein the applied force extends perpendicular to its axis of rotation. However, this clamping force may be non-constant due to the flexural elasticity of the axis of rotation, the clearance between the roller and the axis of rotation, and / or the clearance between the axis of rotation and the corresponding bearing, and may affect both the drafting results and the fiber sliver transport results. This can be adjusted accordingly by the load acting on the roller, since the load and therefore the clamping force can be adjusted accordingly, as described elsewhere.

[0032] According to another preferred aspect, a first reference structure may be provided having at least one, particularly milled, reference surface as a stop, and a second reference structure may have at least one, particularly milled, reference mating surface as a mating stop. Therefore, operation can be improved, and roller adjustment can be facilitated, as described in more detail herein.

[0033] The reference surface or reference mating surface, particularly the surface in or on the load carrier or support, is preferably formed by machining (e.g., milling) so that it can be used as a reference for the support arrangement. In this case, at least one support can be configured to have a carrier for accommodating at least one upper roller, thereby enabling the roller to be arranged on the load carrier, wherein the roller can occupy the position required in the fiber sliver transport direction.

[0034] The stop or mating stop is an exemplary particular form of reference structure, particularly a reference surface. The stop or mating stop is specifically used for surfaces or components capable of establishing a connection between a portion of the load carrier and at least one support, and more preferably between at least one support and another, so as to form a defined positioning of the support to be positioned, thereby forming a defined positioning of the corresponding carrier of the roller, and thus forming a defined positioning of the corresponding roller itself. The support can preferably be arranged on the load carrier in such a way that it is arranged on or relative to the stop or mating stop in order to hold the roller in the desired position, and more preferably fixed there in a precise position (in which case the roller remains rotatably movable, only its position relative to the load carrier is fixed).

[0035] According to a preferred embodiment, the reference surface and the reference mating surface are configured to define the positioning of at least one support by mutual contact when the at least one support is arranged. Alternatively or additionally, the reference surface and the reference mating surface are configured to define the positioning of at least one support by inserting a calibration element when the at least one support is arranged, wherein the calibration element is configured to be arranged between and in contact with the reference surface and the reference mating surface to adjust the position of at least one support relative to the load carrier in a defined manner.

[0036] According to a preferred aspect, at least one calibration element can be assigned to the load carrier to define and adjust the distance between the two supports relative to each other and / or the distance between at least one support and the first reference structure as needed, thereby defining and adjusting the position of the roller in the drafting device. This improves operation and facilitates fiber sliver replacement.

[0037] The calibration element, in particular an insert with a defined thickness, can be arranged between a reference structure and adjacent supports and / or supports of a carrier for a roller on a load-bearing surface, thereby defining the relative position of the supports with respect to the reference structure, particularly being configured as a reference surface. The calibration element can have different thicknesses to allow for different distances (and corresponding combinations are possible if used individually), depending on the relative position of the roller with respect to the reference structure required for a particular application. The calibration element can preferably have a thickness between 20 mm and 5 mm, wherein the thickness can also be further preferably in the range of 15 mm and 7 mm. In other preferred embodiments, calibration elements with a thickness between 12 mm and 9 mm can be used.

[0038] According to a preferred embodiment, one of the first and second reference structures is configured as a protrusion, wherein an end-side protrusion surface facing the fiber sliver transport direction or opposite to the fiber sliver transport direction forms a reference surface or a reference mating surface, and the other of the first and second reference structures forms a groove congruent to the protrusion to receive the protrusion, wherein the end-side groove surface points in the direction of the protrusion surface and correspondingly forms a reference mating surface or a reference surface. The reference surface and the reference mating surface are also preferably configured to contact each other to position at least one support or insert a calibration element, wherein the calibration element is configured to be arranged between and in contact with the reference surface and the reference mating surface to adjust the position of at least one support relative to the load carrier in a defined manner. Therefore, operation can be further improved, and fiber sliver replacement can be further facilitated.

[0039] Furthermore, according to a preferred embodiment, at least two supports can be provided, wherein each support includes a second reference structure as described herein, and one of the two supports includes another second reference structure or a first reference structure as described elsewhere. In one of the at least two supports, the second reference structure is constructed and arranged to define the position of one support relative to the load carrier when the first reference structure is arranged adjacent to the load carrier, and the second reference structure is constructed and arranged in the other of the at least two supports to define the position of the other support relative to the already positioned support or relative to the load carrier when the other support is arranged adjacent to the first reference structure or another second reference structure of the already positioned support. Therefore, the principle of positioning supports by means of reference structures can also be used to position other supports, resulting in further improved operation and further facilitating fiber strip replacement. In particular, the reference structures are preferably arranged and constructed on the opposite ends of the supports. Therefore, the reference structures of two supports to be arranged adjacent to each other can be arranged relative to each other in a simple manner so that precise positioning can be performed in a simplified manner, as described elsewhere.

[0040] In this case, at least one calibration element may also be provided, which is assigned to the load carrier and configured to be arranged between and in contact with the reference structures (either the first and second reference structures or the two second reference structures) of the two supports to be arranged adjacently, so as to set the position of one support relative to another adjacent already positioned support or relative to the load carrier in a defined manner as described above.

[0041] The above concept preferably allows for the arrangement of multiple supports relative to each other within the load carrier through an initial orientation on a first reference structure of the load carrier. In this case, this preferably forms a reference point for all supports. In a preferred embodiment, supports for the (first) roller to be inserted, particularly the upper output roller, can be arranged on the load carrier in such a way that they present a defined relative position with respect to the first reference structure. According to a preferred embodiment, it can, for example, rest against the first reference structure, which can preferably be configured as a reference surface. The supports can preferably be formed as a single component, particularly as a component formed of several parts, to accommodate the carrier, and more preferably to accommodate a spring, as described in more detail below, and to incorporate them into the component.

[0042] According to a preferred embodiment, at least one groove extending along the fiber sliver transport direction of the drawing device can be formed in the load carrier and laterally defined by a track, wherein, after occupying the defined position, at least one support can be fixed to the load carrier along the fiber sliver transport direction by means of at least one groove and track.

[0043] The track is preferably disposed within the load carrier and configured to accommodate supports thereon, and more preferably, to accommodate corresponding calibrators on the load carrier together with them. In this case, the calibrators may be clamped specifically between two supports (as corresponding components) or clamped separately between at least one support and the load carrier. In this case, the track can serve as a fixing structure, allowing the rollers to be fixed in position relative to each other, for example, by screwing the supports from above the load carrier to a specific relative position. This facilitates the insertion and replacement of the fiber sliver, as only one opening needs to be made in the load carrier (corresponding to the drafting device), and the roller carrying its carrier can then be removed so that it can be replaced with a new or other roller carrying its carrier. In this case, the positioning can be changed accordingly, especially if this is necessary or desired. Otherwise, positioning can be achieved via the track, such that positioning is maintained relative to a reference structure. The track can be aligned to have a specific longitudinal direction so that the rollers can be arranged in a specific sequence along the fiber sliver transport direction. This arrangement helps improve the handling of the load carrier and facilitates fiber sliver replacement.

[0044] According to a preferred aspect, the load carrier may have a compression member for positioning the carrier (and thus the roller itself) of the roller to be arranged. The compression member may be configured, preferably constructed and arranged in at least one support, such that it positions the carrier on the support, particularly locking the carrier on the support, and further particularly by engaging a groove formed on the carrier. Thus, the roller can be handled more easily, and the carrier can be replaced with the roller more easily.

[0045] The compression element is, in particular, a component that can preferably be designed to position the carrier of the roller to be arranged and hold it in a specific relative position (particularly understood as a spaced position relative to the support). The compression element is preferably arranged on the load carrier, more preferably on the support, so as to lock the carrier of the roller so that the roller can be held in the desired position (particularly understood as a spaced position relative to the support).

[0046] In the context of this invention, "demand-based" should be understood as a synonym for "based on requirements," "appropriate," "demand-oriented," "expected," or "corresponding." For example, this includes measures that can be identified, defined, and selected, etc., to achieve appropriate, demand-oriented, and expected goals or results.

[0047] To position the compressor within the support, a groove can be formed on the carrier into which the compressor engages, thereby locking the carrier onto the support that houses it. Locking can occur, for example, along the longitudinal axis of the carrier, which is parallel to the axis of rotation of the roller supported by the carrier. When a force, such as compressive or tensile force, is applied to the carrier in the direction of the longitudinal axis, the compressor can be pushed back, thus overcoming the locking force that holds the carrier in place by the compressor, allowing the carrier to be removed by the roller, particularly without tools.

[0048] The compression component enables simple operation and facilitates carrier replacement with rollers, as the rollers can be positioned and locked in the appropriate location on the support, for example, along the longitudinal axis of the carrier, without the need for additional tools, especially measuring devices or measuring instruments.

[0049] The compression element can be, for example, a coupling element for engaging a groove of a carrier, which is pre-tensioned in the support along the longitudinal axis of the carrier under a defined spring pressure, such that the carrier can be interchangeably arranged in the support.

[0050] The compression mechanism allows the carrier to be removed from the support or load carrier without tools, thereby removing the roller. This improves operation, particularly by simplifying roller changes, such as in cases of wear or changes in the spinning process, for example, because different fiber slivers make different roller properties seem appropriate.

[0051] In this context, "toolless" specifically refers to the possibility of removing or positioning the rollers without the need for auxiliary devices such as special tools. In particular, it eliminates the need for screwdrivers, cordless screwdrivers, gauges, pliers, or similar tools.

[0052] Removing at least one roller from the support by means of a carrier specifically means providing a structure in which the carrier of the roller can be easily removed from a particular position without the need for additional auxiliary devices, such as tools. This makes simple and quick replacement of at least one roller possible, especially when wear has occurred or when the spinning method needs to be changed. In this case, removal can be carried out, for example, by pulling the carrier, without the need for separate auxiliary devices, such as tools, to overcome, for example, the locking forces described elsewhere.

[0053] According to a preferred embodiment, the load carrier has a locking device configured and arranged to move the load carrier between a closed state (as described elsewhere) and an open state (as described elsewhere), particularly by pivoting about a retainer, and to lock the load carrier onto the drafting device or textile machine in the closed state, wherein the locking device is located downstream of the last support or upstream of the first support in the fiber sliver transport direction. Therefore, this structure can be strengthened to limit and constrain the relative movement of the upper and lower rollers. Thus, the fiber sliver stretch can be improved. Furthermore, the adjustment area of ​​the load carrier for adjusting the load on the upper roller can remain freely accessible, at least in the closed state, and more preferably in the open state, because these areas are not covered or hidden by the locking device.

[0054] In this case, the locking device can preferably be configured as a lever with a handle, wherein the handle can be connected to the gripper by the lever, such that the gripper contacts the mating part by pivoting or pushing motion in order to lock the load carrier. As a result, in the drawing device with the load carrier, the upper roller and the lower roller can be locked in their relative positions to each other.

[0055] Specifically, the upper roller is arranged relative to the assigned lower roller so that it can be positioned higher relative to the bottom surface of the spinning machine. Therefore, the load carrier supporting the upper roller allows it to move away from the lower roller. For this purpose, the locking device can be opened, thereby releasing the locking of the load arm and thus releasing the locking of the upper roller relative to the lower roller. The load arm can then be pivoted away from the lower roller, particularly at least partially in the height direction, to interrupt the combination of the upper and lower rollers, thereby, for example, reaching and removing the fiber sliver to be stretched between them and / or inserting the fiber sliver and / or, for example, performing prescribed maintenance measures on one of the load carriers or its components.

[0056] The locked state can be understood as one state, and the unlocked state as another. Similarly, the open state can be understood as another state when the loading arm pivots to a position allowing access to the gap between the upper and lower rollers. In this case, the pivoting movement can specifically be about a retainer (e.g., a rod) that connects the load carrier, its base, and / or its load arm to the spinning machine. In a preferred embodiment, the retainer can be screwed onto the spinning machine. In other preferred embodiments, the latter can be welded to the spinning machine or otherwise reversibly or irreversibly connected.

[0057] According to a preferred embodiment, the locking device is located downstream of the last support in the fiber sliver transport direction. The last support may be a support for carrying the upper output roller. The upper output roller is used to output the fiber sliver from the drafting device in its maximum stretched form according to a suitable given setting, so that it can be further processed in the spinning machine. A pair of output rollers may in particular be a combination of an upper output roller and a lower output roller. In this case, in the operating state, the upper output roller or output roller pair may serve as the last roller or the last pair of rollers in the drafting device, contributing to the stretching of the fiber sliver along the fiber sliver transport direction.

[0058] According to another preferred embodiment, the locking device is located upstream of the first support in the fiber sliver transport direction. The first support may be a support for carrying the upper input roller. The upper input roller is used to receive the fiber sliver from the fiber sliver feed device and / or pre-compressor and guide it to the drafting area of ​​the drafting device. A pair of input rollers may particularly be a combination of an upper input roller and a lower input roller. In this case, it may be particularly provided that, in the operating state, the input roller or input roller pair along the fiber sliver transport direction is a first roller or first roller pair, which can contribute to the stretching in the drafting device.

[0059] The upstream arrangement of the locking device allows for some basic flexibility in the relative positioning of the structure between the upper and lower rollers. This is particularly true because the locking device is closer to the pivoting area, such as around the retainer, than in other preferred embodiments. In other words, the area between the locking device and the upper output roller can be fixed less rigidly in this case.

[0060] The downstream arrangement of the locking device allows the structure to experience increased and fundamental structural stiffness in its relative positioning between the upper and lower rollers. This is particularly true because the locking device allows for locking at the outer end of the load carrier to achieve reliable retention. In other words, in this case, the area between the locking device and the output roller can be rigidly fixed because the locking device is arranged on the load arm downstream of the roller along the fiber sliver transport direction.

[0061] According to a preferred embodiment, the load carrier has a base pivotable about a retainer of the load carrier and a load arm connected to the base, wherein at least one support can be positioned on the load arm, and more preferably fixed on the load arm, as described elsewhere by way of example.

[0062] Preferably, the matrix has support points on the retainer to allow the matrix to pivot about the retainer. The support points are configured to define a pivoting region for the load carrier, thereby enabling the load carrier to pivot about the retainer. This facilitates further structural reinforcement of the load carrier. In this case, the amount of material used can be increased compared to other preferred embodiments. In this case, the support points can be configured as part of the matrix of the load carrier. The support points can particularly function as rotary joints to allow the load carrier to pivot about its retainer on the spinning machine.

[0063] According to a preferred embodiment, the matrix providing the load carrier may have a pre-compressor. The matrix may preferably be constructed and arranged to house, in particular, at least a portion of, the pre-compressor, wherein the pre-compressor is configured to pre-compress the fiber sliver to an upper roller initially arranged on the load carrier in the fiber sliver transport direction. Thus, the pre-compressor can be connected to the matrix at a predetermined location.

[0064] Furthermore, it is preferable to provide a retainer constructed and arranged to form a permanent fixed portion of the pre-compressor. In this case, the retainer can be provided together with the matrix to form at least one fiber sliver supply portion of the pre-compressor. Thus, the pre-compressor can be connected to the structure at a predetermined location.

[0065] According to a preferred embodiment, a pre-compressor can be provided having a pivotable portion. This latter portion can be constructed and arranged on the substrate of the load carrier in such a way that, during transition to the open state, it moves with the substrate during movement about the retainer, and, in the closed, particularly locked state, forms a pre-compressor with a permanently fixed portion of the pre-compressor so that the fiber sliver can be guided through the permanently fixed portion into the pivotable portion of the pre-compressor to transfer the fiber sliver to the input roller downstream along the fiber sliver transport direction in a pre-compressed manner. By combining the pivotable portion of the pre-compressor with the substrate, the permanently fixed portion of the pre-compressor is combined with the retainer, and the fiber sliver can be clamped, particularly when the two portions move relative to each other. Therefore, when maintenance work, for example, must be performed on the load carrier or drafting device, slippage of the fiber sliver from the pre-compressor can be reliably prevented.

[0066] Furthermore, the pre-compressor may preferably have an extension. This nozzle may be specifically configured as a sliver nozzle with an inner diameter particularly narrower than the remaining upstream guide structure of the pre-compressor. Thus, the sliver can be transported and further compacted in a defined manner. The extension may extend beyond the area of ​​the pre-compressor formed in another component. This other component may be a component such as a load carrier, load arm, the base of the load arm, and / or a bearing. In other words, the extension in the sliver transport direction forms the final component of the pre-compressor. In this way, the sliver can be guided, particularly in the direction of the input roller, and in this way, vibration and / or lateral movement of the sliver can be reduced in particular.

[0067] The extension can be in the form of a hollow body, such as a tubular structure, and can be, for example, cylindrical. This improves guidance and provides protection against external influences. Alternatively or in sections, the extension may also preferably be formed to open to one side, particularly to the top. In this way, the pre-compressor or extension can be accessed or observed. Furthermore, the extension may preferably have an inner diameter that gradually tapers in the fiber sliver transport direction to allow for further pre-compression of the fiber sliver as needed. The tapering section can be continuous or segmented.

[0068] Furthermore, the extension can preferably be arranged on the pre-compressor so that it can be replaced without tools. This allows for the use of different compressor diameters for different fiber materials in a simple manner without replacing the entire pre-compressor. For example, the extension and / or pre-compressor can have locking and / or clamp connections for arranging and securing the extension to the pre-compressor.

[0069] According to another independent aspect, the drawing device may have at least one load carrier, as described elsewhere. Therefore, the advantages, features, and effects listed in this regard can be used to describe the drawing device, as already explained elsewhere.

[0070] As described elsewhere, a drafting device is specifically a device used to stretch or warp a supplied sliver of fiber. It may also be referred to as a roll mill, and in particular consists of at least two pairs of rolls, each pair having a corresponding roll and a mating roll. According to this separate aspect, a drafting device is a drafting device for a textile machine, used to prepare the supplied sliver of fiber in a prescribed manner before, for example, by means of a device of the textile machine located downstream of the drafting device, it is processed into yarn.

[0071] According to another independent aspect, a textile machine may have at least one load carrier as described elsewhere and / or at least one drafting device as described elsewhere. Therefore, the advantages, features, and effects listed in this regard can be used to describe textile machines already explained elsewhere.

[0072] A textile machine is a machine used to process or process raw materials to manufacture textiles. Textile machines are preferably roving frames, such as carding machines or flywheels, or spinning machines, such as air-jet spinning machines or ring spinning machines. Each spinning machine has a drafting device that has a load carrier for processing the fiber sliver. Typically, a textile machine can be a machine that includes a drafting device with an upper roller for processing the fiber sliver.

[0073] Depending on the individual aspects, the advantages and effects can be achieved and / or realized by using load carriers and / or drafting devices and / or textile machines, particularly by means of features, such as those described in relation to the various aspects and those already described elsewhere in this regard.

[0074] When using a load carrier as described elsewhere and / or a drafting device as described elsewhere and / or a textile machine as described elsewhere, the sliver can be guided in the pre-compressor in the closed state—particularly relative to the drafting device and / or load carrier—to supply it to the input rollers of the drafting device. In the open state—particularly with respect to the drafting device and / or load carrier—the sliver can be clamped by transferring the pivotable portion of the pre-compressor relative to the fixed portion of the pre-compressor to the open state, particularly between the permanently fixed portion and the pivotable portion.

[0075] According to another independent aspect, a method for replacing at least one roller can be designed. This method may include the step of transferring a load carrier from a closed state, as described elsewhere, to an open state, as described elsewhere. This method may include the step of removing at least one roller by moving the carrier axially relative to the support relative to the axis of the carrier to remove the carrier from the support. This method may include the step of replacing the roller and / or the carrier. This method may include the step of arranging the carrier (via a new roller / via another roller) on the support. Therefore, the advantages, features, and effects listed in this regard can be used to describe methods already explained elsewhere.

[0076] The use of load carriers, as described elsewhere, specifically involves applying mechanical force to rollers to generate or change tension in the fiber sliver. Load carriers are used, for example, in textile machines, as described elsewhere, to warp the fiber sliver before yarn production.

[0077] As described elsewhere, the use of a drafting device specifically involves applying mechanical force on rollers to stretch or warp the fiber sliver. A drafting device is used, for example, in one of the aforementioned textile machines to warp the fiber sliver before yarn production.

[0078] As described elsewhere, the uses of textile machines specifically include the use of textile machines for producing rovings or yarns. This may include the use of one of the textile machines described elsewhere. For this purpose, the textile machine is equipped with a load carrier and / or a drafting device to enable the corresponding process steps.

[0079] According to another independent aspect, as described herein, a method for positioning at least one support on a load carrier having a carrier for receiving an upper roller can be provided. The method includes the step of arranging at least one support on the load carrier, and the subsequent step of positioning at least one support relative to the load carrier adjacent to a first reference structure, wherein positioning is performed by contacting a second reference structure with the first reference structure or by using a calibration element inserted between the first and second reference structures. Therefore, the advantages, features, and effects listed in this regard can be used to describe methods already explained elsewhere.

[0080] Preferably, the method may include a subsequent step of securing at least one support to the load carrier by means of a fastening device configured and arranged to secure the support to the load carrier. As a result, permissible positioning of at least one support can be achieved.

[0081] Furthermore, preferably, the method may include the step of arranging at least one additional support on the load carrier, and the subsequent step of positioning at least one additional support relative to the load carrier near the already positioned support, wherein positioning is performed using a calibrator inserted between the corresponding second reference structure of the already positioned support and the at least one additional support positioned adjacent to it. As a result, all supports of the load carrier can be positioned on the load carrier relative to the first reference structure, and further preferably secured to the load carrier by means of assigned fastening devices. Therefore, the advantages, features, and effects listed in this respect can be used to describe methods already explained elsewhere.

[0082] One positioning method is specifically a method in which one or more supports are positioned at specific locations on a load carrier relative to each other or relative to the load carrier. This can be achieved by using calibration elements that can be inserted or removed between reference structures.

[0083] As an alternative to or supplement to the insertion step, the removal of the calibrator step specifically involves adding calibrators between reference structures as an alternative to or supplement to the removal, in order to improve the positioning of the support. Through this step, the position of the support can be adjusted and precisely as needed, thereby ultimately adjusting and regulating the position of the roller in the fiber sliver transport direction to meet certain requirements or optimize the behavior of the drafting device during operation.

[0084] According to another independent aspect, a method for loading a roller relative to a mating roller can be designed. This method may include the step of adjusting the spring between at least two tensioned positions in a spring retainer, as described elsewhere. Therefore, the advantages, features, and effects listed in this regard can be used to describe methods already explained elsewhere.

[0085] The method of loading a roller relative to a mating roller can be a method of applying a specific force to the roller so as to press the roller against the mating roller with a desired compressive force, thereby generating a specific clamping force between them, which can be transmitted to the fiber sliver running between them. This method can be achieved by using a spring that can be adjusted between at least two tension positions.

[0086] By adjusting the springs between these tension positions, the clamping force that the roller can apply can be adjusted to achieve a certain load. Therefore, this method allows for adjustment of the clamping force between the roller and the mating roller, and can help ensure perfect operation of the drafting unit or textile machine, and can achieve improved product quality.

[0087] The step of adjusting the spring between at least two tension positions in the spring retainer can be performed accordingly by moving the spring from one tension position to the desired tension position, as described elsewhere as an example.

[0088] Other advantages, features, and details of the invention will become apparent from the following description, in which exemplary embodiments are described in detail with reference to the accompanying drawings. Within the scope of the invention, the features mentioned in the claims and in the specification can be applied individually or in any combination. An illustrative illustration shows:

[0089] Figure 1 An illustration shows an embodiment of a load carrier having an upper roller;

[0090] Figure 2 It shows Figure 1 A top view of the implementation method;

[0091] Figure 3A It shows the way Figure 2 A cross-sectional view of the implementation method described above;

[0092] Figure 3B A side view of the upper roller is shown, indicating a sectional view;

[0093] Figure 4 It shows Figure 2 A top view of the implementation method, indicating the adjustment range;

[0094] Figure 5A An illustration shows an embodiment of a load carrier having an upper roller;

[0095] Figure 5B A side view shows the... Figure 5A A diagram illustrating an embodiment of the load carrier of the upper roller;

[0096] Figure 5C It shows that by according to Figure 5A and5B A cross-sectional view of the implementation method;

[0097] Figure 6A It shows that according to Figure 5A and 5B A side view of an embodiment of a load carrier having an upper roller in the closed position;

[0098] Figure 6B It shows that according to Figure 5A and 5B A side view of an embodiment having a load carrier with an upper roller in the open position; and

[0099] Figure 7 It shows that according to Figures 5A to 6B A simplified lower view of an embodiment of a load carrier having an upper roller.

[0100] Elements and structures that have the same function and / or are of the same type are indicated by the same reference numerals.

[0101] Figure 1 A schematic diagram of an embodiment of a load carrier 16 having a plurality of upper rollers 20 is shown. In the illustrated embodiment, the load carrier 16 is specifically configured to arrange four upper rollers 20, wherein the first upper roller 20, arranged in the fiber sliver transport direction (not shown) in the arrangement direction of the upper rollers 20, forms an upper output roller 21 for introducing the supplied fiber sliver (not shown) into the drafting region of the drafting device 10. The last upper roller 20, arranged in the fiber sliver transport direction in the arrangement direction of the upper rollers 20, in this embodiment being the fourth upper roller 20, forms an output roller 23 for discharging the fiber sliver from the drafting device 10. In this embodiment, the upper rollers 20 are passively driven. In other words, in the operating state of the drafting device 10, the driving of the upper rollers 20 is achieved by a lower roller (not shown) assigned to and in rotational contact with the upper rollers 20, which is particularly driven individually. According to another embodiment, at least one of the upper rollers 20 may also be driven, particularly individually, to assist the fiber sliver transport in a defined manner in the fiber sliver transport direction or opposite to the fiber sliver transport direction when needed. In this way, a movement can be initiated to guide the fiber sliver from the pre-compressor 70 to introduce the fiber sliver into the area of ​​the drafting device 10 between the lower rollers in a pre-compressed manner, and if desired, between at least one belt (not shown) and the assigned upper roller 20 (a belt may also be provided here, but is not shown in detail for clarity) to stretch the fiber sliver in a defined manner.

[0102] The upper roller 20, and correspondingly, also includes the upper input roller 21 and / or the upper output roller 23, which in each case can be arranged on the assigned support 39 via the carrier 38 so that the upper roller 20 can be connected to and arranged on the load carrier 16.

[0103] A suction device 36 can be arranged on the upper output roller 23 and, in this embodiment, the upper belt roller 22 located upstream of the upper output roller 23. Fiber residue can be sucked away through the suction device 36 via a hose 34 and a funnel element 34A (only one funnel element 34A on the upper belt roller 23 is shown for clarity). One end of the corresponding funnel element 34A is connected to the allocated hose 34, and the other end preferably has a profile congruent to the outer peripheral surface of the allocated upper roller 20, for partially or completely covering the outer peripheral surface. The suction device 36 can be clamped, particularly by means of a clamping device 92, onto a carrier 38, on which the upper belt roller 22 or the upper output roller 23 can be arranged. For this purpose, the clamping device 92 can include a holding device 91, which is configured to hold the funnel element 34A at a distance defined from the outer peripheral surface of the upper roller 20. Furthermore, the clamping device 92 has a clamping element 93 for clamping onto the carrier 38. The clamping device 92 can be configured in a more preferred manner to retain the belt cage 22A. Figure 2 The belt is arranged between the upper belt roller 22 and the upper output roller 23 so that, in the operating state of the drafting device 10 or the load carrier 16, the belt rotates in a conventional manner around the upper belt roller 22 and the belt cage 22A in order to process the supplied fiber strip in a conventional manner.

[0104] The load carrier 16 specifically features a base 30, which can be manually, either manually or automatically, by a service robot (not shown) transferred from an operating or stretching state to a loading state via a handle 32. In this state, the upper roller 20 can form a clamping force with the assigned lower roller, and can also be designated as a closed, locked state Z1, in which the clamping force can be lost. For maintenance of the drawing device 10, the base 30 can be transferred to an open state Z2 as a maintenance state. Figure 6B The open state is characterized by the upper roller 20 of the load carrier 16 being spaced apart from the correspondingly assigned lower roller. The maintenance state defines one of several possible open states. In this case, the substrate 30 can be secured to the textile machine via the retainer 28, wherein the substrate 30 can be rotatably arranged on the retainer 28 about the longitudinal axis L of the retainer 28. Figure 2In this configuration, the handle 32 can be configured as part of the locking device 31, wherein pivoting movement can be performed via a lever 35, which can be rotatably supported on the connector 60, so that a clamp 33 (also referred to as a clamping device) disposed on or formed therewith the lever 35 locks into locking contact with a corresponding portion of the textile machine or retainer 28, thereby locking the load carrier 16 of the upper roller 20 relative to the lower roller, from an open state Z2 or a locked-off state Z1 deviating from the open state, corresponding to an operating state, a stretched state, or a loaded state. Thus, the handle 32 allows the load carrier 16 to pivot as needed between the open state Z2 or between the open state and the locked state Z1. In this configuration, according to a preferred embodiment, a further state can be provided to enable demand-based actions on the load carrier 16. For example, in the opening direction of the load carrier 16, another open state following the open state Z2 can be provided to improve access to the underside of the load carrier 16. Furthermore, a further open state can preferably be provided between positions Z2 and Z1, which is sufficient, for example, to handle the spring 24. Furthermore, a further closed state can be provided between state positions Z1 and Z2, wherein in this further closed state, the compressive force of the upper roller 20 on the assigned lower roller is less than that in the closed state Z1, where the spring position is the same. This other closed state can be, for example, the loading state described above.

[0105] The load carrier 16 has a load arm 76 projecting from the base 30. Particularly for each of the four upper rollers 20, in this preferred embodiment, a support 39 is arranged on each side to accommodate one of the upper rollers 20. The support 39 may be configured to accommodate two upper rollers 20 in an alternative preferred manner (not shown). The base 30 and the load arm 76 are preferably formed as a single unit from the same material, but alternatively, they may preferably be formed from multiple parts, and more preferably from different materials.

[0106] Near the matrix 30, a pre-compressor 70 is arranged on the retainer 28 in such a way that the fiber sliver to be supplied to the drafting device 10 is directionally fed into the clamping area of ​​a pair of input rollers of the drafting device 10. The pre-compressor 70 is clamped on the retainer 28, or can slide onto the retainer 28, or can be fastened to the retainer 28 by means of a support fastening device. The pre-compressor 70 has a funnel-shaped inlet whose opening width gradually tapers in the direction of the drafting device 10, for compressing the fiber sliver to the funnel outlet 78. In the fiber sliver transport direction, a fiber sliver feed device 79 is located downstream of the funnel outlet 78 so as to guide the pre-compressed fiber sliver in the direction of the upper input roller 21. According to this embodiment, the fiber sliver feed device 79 is integrally formed with the funnel 77.

[0107] According to this preferred embodiment, the support 39 has a spring arm support 49 for receiving the spring 24, wherein the spring arm support 49 is connected to a spring retainer 42 for holding the spring 24. Furthermore, the support 39 includes a carrier retainer 54 for holding a carrier 38 that carries the upper roller 20. The carrier 38 can be designed to carry one or two upper rollers 20. The carrier retainer 54 is connected to the spring retainer 42 via a rotary joint 55. The rotary joint 55 can be constructed and designed in a conventional manner. Essentially, the rotary joint 55 allows the carrier retainer 54 to rotate about an axis parallel to the axis of the carrier 38 or the upper roller 20. The rotary joint 55 can preferably be formed by a connector pin protruding into a pin opening, wherein the connector pin is disposed on the carrier retainer 54 or the spring retainer 42, and the pin opening is correspondingly disposed on the spring retainer 42 or the carrier retainer 54 for mutual engagement. According to one embodiment, the connector pin may be formed by a connector rod 56, the ends of which protrude beyond the receiving channel in the carrier retainer 54 at both sides, so that they can be received by corresponding assigned pin openings arranged outside the receiving channel and in the spring retainer 42.

[0108] Furthermore, the reference structure 61 may preferably be constructed and / or arranged in or on the load carrier 16, particularly on the load arm 76, so that when the support 39 is arranged on the load carrier 16 or the load arm 76, it defines the position of at least one of the upper rollers 20 (here, the upper input roller 21, the upper belt roller 22, and the upper output roller 23 are also referenced, unless otherwise explicitly designed or excluded unless due to the technical logic of a person skilled in the art) relative to the load carrier 16 or the load arm 76, and thus relative to the position of the drawing device 10. This is in Figure 4 and Figure 7 The corresponding text is shown below. Figure 4 It shows Figure 1 Figure 3 shows a schematic top view of the load carrier 16, and... Figure 7 An embodiment according to another embodiment is shown. Figures 5A to 6B The diagram shows a simplified schematic representation of the load carrier 16 from below; the top view does not fully show the components. The reference structure 61 may have a reference surface 62, which can be constructed and arranged such that the support 39 with the corresponding upper roller 20 can be positioned relative to this reference surface 62. This can be achieved, in particular, by providing fixed and defined end positions on the load carrier 16 or load arm 76 for the support 39 of the first or last upper roller 20 in the arrangement direction of the upper roller 20. A corresponding reference structure 61 can be assigned to this end position, which can accordingly serve as a positioning reference for the upper roller 20, carrier 38, or support 39. In this case, the reference structure 61 can be constructed as a reference surface 62 against which adjacent supports 39 to be arranged can abut, either directly or indirectly, via at least one calibrator (not shown). Figure 1and Figure 2 As shown, when the support 39 is correctly or desiredly positioned in the fiber sliver transport direction, the screw 74 can be tightened to lock the desired positioning of the support 39 relative to the track 25. Since the corresponding load carrier 16 "carries" its own reference structure 61 in this case, the drafting device 10 can be adjusted according to the usage requirements without the need for measurement using tools such as sliding calipers.

[0109] According to the preferred embodiment, such as Figure 4 and Figure 7 As shown, the reference structure 61 is configured as a protrusion in the load arm 76, particularly integrally formed with the load arm 76, and more preferably milled. Alternatively, the reference structure 61 may be arranged and fastened to the load arm 76. Furthermore, alternatively, the reference structure 61 may be arranged and fastened to the base 30, or may be integrally formed with the base 30. The reference structure 61 has a reference surface 62, which, according to this embodiment, serves as a contact surface of the support 39 of the upper output roller 23. The support 39 also preferably has a reference mating surface 63, which is arranged and configured to abut against the reference surface 62. More preferably, the reference mating surface 63 is assigned to a reference mating structure, which is formed by, in particular, milled grooves. Both the reference mating surface 63 and the reference surface 62 point in the possible displacement direction of the support 39, which extends along the fiber sliver transport direction. According to this embodiment, the reference surface 62 and the reference mating surface 63 are formed by protrusions and grooves, wherein the protrusions are formed on the load carrier 16 and the grooves are formed on the support 39. It should be understood that, according to the embodiment not shown, a groove may be formed on the load carrier 16 and correspondingly, equal protrusions may be formed on the support 39, without deviating from the described concept of relative positioning.

[0110] Precise positioning of the upper output roller 23 on the load arm 76 can be achieved by shifting the support 39 for the upper output roller 23 until the reference mating surface 63 abuts against the reference surface 62. After this positioning, the support 39 can be secured in place by means of screws 74. Additional supports 39 for the upper belt roller 22, upper roller 20, and upper input roller 21 can be positioned in the same manner, wherein it must be taken into account that the upper roller 20 adjacent to the positioned upper roller 20 and next in the arrangement sequence must be positioned. The supports 39 for these upper rollers 20 can also have reference surfaces 62 and / or reference mating surfaces 63 so that the calibration piece can be inserted as described above. In particular, the supports 39 for the drafting device 10 are constructed to be identical, more preferably identical, resulting in the drafting device 10 being assembled in a simplified manner. In this regard, it is preferable that each support 39 has a reference mating surface 63 on its end faces that are opposite to each other and point along the fiber transport direction. Alternatively, at least one support 39 may be provided with a reference mating surface 63 on an end face, for example, facing the fiber sliver transport direction, and a reference structure 61, particularly a reference surface 62, on an end face away from that end face, which, for example, is correspondingly facing the fiber sliver transport direction. Alternatively, the latter arrangement may also be provided in reverse or interchangeably.

[0111] Figure 4 It shows Figure 2The top view of the embodiment indicates the possible adjustment range using calibrators. In this case, since the thickness of the calibrator is, for example, between 20 mm and 5 mm, and more preferably between 15 mm and 7 mm, a corresponding distance can be set between the supports 39. In other embodiments, calibrators with a thickness, for example, between 12 mm and 9 mm, can be used. In this case, the calibrators can be offset from each other in steps of 5 mm, particularly in steps of 2 mm, and even more particularly in steps of 1 mm, resulting in fine-tuning of the positioning of the respective supports 39. In this configuration, for the upper roller 20 supported upstream of the upper output roller 23 along the fiber sliver transport direction, specifically for a total of three adjustment zones, each upper roller 20 may provide an adjustment zone for an adjustable distance 68 along the fiber sliver transport direction and an adjustable distance 68 for the input field width allocated to the upper input roller 21 according to this embodiment; an adjustable distance 66 for the first intermediate field width allocated to the upper roller 20 supported downstream of the upper input roller 21 in the fiber sliver transport direction according to this embodiment; and an adjustable distance 64 for the second intermediate field width allocated to the upper belt roller 22 according to this embodiment. Although the adjustable distance for the output field width allocated to the upper output roller 23 is not shown, such an adjustable distance may also be provided according to an embodiment not shown. For this purpose, for example, a calibration member may be abutted against the reference structure 61 or reference surface 62, with the support 39 of the upper output roller 23 contacting and thus positioning it, and the support 39 subsequently secured by screws 74.

[0112] Alternatively or additionally, the spring 24 may be arranged in the spring retainer 42 by means of a support 39 on the load carrier 16, and constructed in such a way that, after the upper roller 20 is arranged on the support 39, the position of the upper roller 20 is loaded in a defined manner relative to the mating roller in a stretched state. The spring 24 may be in the form of a torsion spring 90, as shown here as an example. Figure 1 , 2 Figures 3A and 4 specifically illustrate the position of the second spring arm 48 of spring 24 in the delivery state F0 of the load carrier 16, as an example for a better overview. Therefore, spring 24 is not tensioned here to save its tension upon delivery. As an example of adjustment, particularly in… Figure 3B The adjustment of the second spring arm 48 in position F1 is shown. In this case, those skilled in the art will understand that the corresponding positions F1, F2, and F3 can be selected as needed, for example, depending on the application, and these positions F1, F2, and F3 each define the tension position of the spring 24. For clarity, in Figure 3B The figure only shows the F0 position, but not in detail. The F0 position may correspond, for example, to the position of the second spring arm 48 in the vertical direction, as shown in the figure.

[0113] like Figure 3B As shown and described in this respect, three different configurations of the spring 24 can be specifically arranged in the spring arm support 49 of the spring retainer 42 for the spring 24, particularly the torsion spring 90, which is shown here in a cross-sectional view with dashed lines, located inside. For better understanding, in Figure 3A The image uses small arrows as examples to illustrate the direction of observation. For example... Figure 2 As shown in the top view, three spring arm supports can be specifically provided, in which a second spring arm 48 can be arranged to apply tension to the spring 24. In this case, the further the second spring arm 48 is from the position F0 in the supplied state in positions F1 to F3, the stronger the tension of the spring 24 can become. The boundary between the spring arm supports 49 for the spring 24 can prevent the spring 24 from sliding from one of the tensioned positions F1, F2, F3 or the starting position F0 to another position. According to this embodiment, the boundary is configured as a separating web between adjacent spring arm supports. Therefore, in the top or bottom view, the corresponding spring arm support 49 has a U-shape. In contrast, the spring arm support 49 can also be C-shaped or other shapes, as long as the spring arm support 49 can accommodate and remove the spring arm.

[0114] The torsion spring 90 has a first spring arm 44 through which a load can be transferred to the operably connected upper roller 20. For this purpose, according to this embodiment, the support 39 is configured as a joint such that the spring retainer 42 is rotatably connected via a rotary joint 55 to a carrier retainer 54 for holding the carrier 38, wherein the first spring arm 44 is operably connected to the carrier retainer 54, or alternatively to the carrier 38, so that the upper roller 20 can be pressed against either the mating roller or the lower roller (not shown). In this case, the first spring arm 44 can abut against the carrier retainer 54 or the carrier 38 with a spring compression force corresponding to the selected tension positions F1, F2, F3. The spring retainer 42 is configured to retain the spring body 43 of the torsion spring 90.

[0115] Figure 3A It shows the way Figure 1 Perspective side view and Figure 2 The diagram shows a schematic cross-sectional view of the embodiment, taken from a top view. Specifically, it can be seen that the support 39 has a spring retainer 42, in which the spring body 43 of the spring 24 or torsion spring 90 is arranged. In this case, the first spring arm 44 is arranged in the movable portion 40 of the carrier retainer 54, which can be moved via the joint connection 55, as... Figure 1As shown, the tension or spring tension force introduced by the tension positions F1, F2, F3 of the second spring arm 48 is released again by at least partial release of the tension or spring tension force through the tension of the first spring arm 44. As a result, a defined load can be formed on the upper roller 20 so that a defined clamping force can be formed with the assigned lower roller (not shown). The carrier 38 is arranged in the support 39 and can be pushed into the support 39 until the contact area 41. In this case, the compression member 46 provided with the support 39 can engage in the groove 47 on the carrier 38 to lock it. As a result, the upper roller 20, which is rotatably supported in the bearing 52 on the carrier 38, can be arranged at a defined distance relative to the support 39. The bearing 52 can be a conventional roller bearing. In this case, in particular, the load carrier 16 and its support 39 form their own respective reference system so that external measurements and / or tools can be omitted. In this configuration, it is possible to overcome the locking force of the compression member 46 when stretched in the stretching direction 50, which is parallel to the longitudinal axis of the carrier 38. As a result, the upper roller 20 can be removed from the support 39 along with the carrier 38, particularly without the use of tools. For this purpose, particularly according to the preferred embodiment, the compression member 46 can be held in the support 39 in a spring-pre-tensioned manner.

[0116] To facilitate operation of the spring 24 from the upper side of the load arm 76, the load arm 76 specifically includes first and second recesses 57, 58, through which the support 39 can be fixed to the load arm 76 on one hand, and the spring 24, supported by the support 39, can be operated from the upper side of the load arm 76 on the other hand. Operation of the spring 24 is achieved through the first recess 57, through which the spring arm support 49 protrudes. According to this preferred embodiment, the first recess 57 is formed by an elongated hole in the load arm 76. The size of the elongated hole allows the spring arm support 49 to protrude and be guided along the elongated hole. A second recess 58 is arranged parallel to and adjacent to the first recess 57, wherein the second recess 58 is also constructed as an elongated hole. Thus, a track 25 is formed between the first and second recesses 57, 58. Through the second recess 58, the corresponding support 39 can be secured in a desired position by a fastening device such as a screw 74. The screw 74 can also be operated from the upper side of the load arm 76.

[0117] Figure 5A A schematic diagram of another embodiment of the load carrier 16 having an upper roller 20 is shown. Here, a special discussion will be held regarding... Figures 1 to 4 The differences are compared to the embodiments shown and described in this regard. In this case, spring 24 may be in the form of compression spring 80. Spring 24 or compression spring 80 may be arranged to pretension at least one assigned upper roller 20 via linear tension transmission, as... Figure 5C The example is shown and described in this regard. Figure 5BA schematic perspective side view shows the... Figure 5A The illustration shows an embodiment of the load carrier 16 of the upper roller 20. In this case, the design of the alternative locking device 31 becomes more apparent. For clarity, the suction device 36 and the retainer for the hose 34 and funnel element 34A, as well as the hose 34, are not shown in any alternative arrangement, but can be implemented in the same manner as in the embodiment described above.

[0118] According to this embodiment, the load carrier 16 is designed as two parts, including a base 30 and a load arm 76 fixed to the base 30. As shown, the fixing can be achieved specifically by screw connection. Alternatively, the load arm 76 can be fastened to the base 30 by means of other conventional fastening types in a force-locking, form-locking, and / or material-locking manner.

[0119] The load arm 76 according to this embodiment has a locking device 31, which functions similarly to that described above. Therefore, by moving the locking device 31, for example by actuation on the handle 32, it can be locked by engaging the corresponding mating structure (not shown) with the gripper 33. The locking device 31 allows for release, particularly by movement of the handle 32 in another direction, so as to move the upper roller 20 and the lower roller apart to state Z2, such as... Figure 6B The middle section shows and describes in this regard. Movement on the handle 32, to which the lever 35 to which the handle 32 can be connected, can disengage the clamp 33 from engagement with the mating member, thereby releasing the locking device 31 and thus releasing the load carrier 16 or load arm 76. As a result, the load carrier 16, and therefore the drafting device 10, can be opened, wherein the load arm 76, particularly by pivoting the base 30 having the load arm 76 about the retainer 28 of the textile machine, wherein the retainer 28 can form a bearing 37, which can move in a manner that moves the upper roller 20 and the lower roller away from each other. Thus, in the exemplary embodiment shown, the upper roller 20 is lifted from the lower roller.

[0120] and Figures 1 to 4 Contrary to the exemplary embodiments shown and described, the locking device 31 is closer to the upper output roller 23 than to the upper input roller 21, particularly at the free end of the load arm 76. For this purpose, the free end of the load arm 76 may have a retainer 28 for rotatably receiving the lever 35, wherein the retainer 28 is connected to the lever 35 via a joint 60, allowing the lever 35 to move relative to the load arm 76 about the joint axis. This end-side arrangement facilitates more reliable locking of the load arm 76, resulting in a particularly rigid structure, which, for example... Figures 1 to 4 Compared to the previous implementation, this method more firmly fixes the relative positions of the upper roller 20 and the lower roller relative to each other.

[0121] According to this preferred embodiment, the substrate 30 can be specifically provided with a reinforcing structure, for example, by forming more material. Alternatively or additionally, a bearing 19 can be formed around a bearing 37 engaged around the retainer 28, which can represent a material reinforcement of the substrate 30, and the substrate 30 can also be moved when the load arm 76 pivots. As described elsewhere, a pivotable portion 72 of the pre-compressor 70 can be formed in a part of the bearing 19, particularly as part of the substrate 30 of the load carrier 16. It can have a sliver nozzle 75 as an extension 73 of the pre-compressor 70. The sliver nozzle 75 can be arranged on the pre-compressor 70 such that it can be replaced non-destructively without tools, for example by locking and / or clamping. Thus, the pre-compressor 70 can have an opening into which the tip of the sliver nozzle 75 can be inserted in a locking engagement. For this purpose, a locking lug can be formed at the tip of the sliver nozzle 75, and after insertion into the opening on the side of the pre-compressor 70 opposite to the roller 20, the locking lug engages around the edge of the opening. Interchangeability allows the use of fiber sliver nozzles 75 of different sizes, which can be adapted to the fiber sliver to be processed and / or the yarn produced therefrom.

[0122] According to this preferred embodiment, the pre-compressor 70 also accommodates a permanent fixing portion 71, which is formed in a part of the retainer 28. In other words, the retainer 28 has a fiber sliver guiding portion formed at the location where the pre-compressor 70 is arranged, which constitutes the permanent fixing portion 71, and the fiber sliver guiding portion forms a functional part of the pre-compressor 70 when the pre-compressor 70 is arranged on the retainer 28. In this embodiment, the permanent fixing portion 71 or the fiber sliver guiding portion is designed as a groove and is on a predetermined surface portion of the retainer 28. In this way, reliable guidance of the fiber sliver from a spinning tank (not shown) arranged below the load carrier 16 can be ensured. The groove shape can be designed and adapted according to the fiber sliver feeding device.

[0123] When the substrate 30 moves together with the pre-compressor 70 around the retainer 28 in the direction of state Z2, the permanent fixing portion 71 or the fiber guide portion does not move together, thereby causing relative movement of the opening of the pre-compressor 70 relative to the permanent fixing portion 71, so that the fiber guide on the pre-compressor 70 is clamped in the open state of the load carrier 16, thereby reliably preventing the fiber from slipping out when measured on the drawing device 10.

[0124] Figure 5C It shows the way Figure 5A and 5B A cross-sectional view of the implementation method. As according to... Figures 1 to 4In an alternative implementation, a compression spring 80 is shown as spring 24 instead of torsion spring 90 to allow adjustment of the pretension of upper roller 20 relative to lower roller. For this purpose, for example, a helical spring body 82 can be arranged in spring housing 84 to press a compression plunger 86 against carrier 38, thereby pressing the upper roller 20, arranged on carrier 38, downward onto a corresponding mating roller, such as the lower roller, or, if necessary, a belt inserted in the case of a pair of belt rollers. In this case, the compression force can be transmitted accordingly via rotary joint 55, as described elsewhere. Spring housing 84 can be arranged in spring retainer 88. In particular, upper spring portion 85 is constructed and arranged to be guided within spring housing 84, wherein a guide (not shown) is constructed to be guided in a recess 87 of spring housing 84, such that different pretensions of compression spring 80 can be selected, for example, via a first tension position F1 or a second tension position F2. In this configuration, when the helical spring body 82 is compressed or decompressed, the guide device can be guided in a vertical track arranged on the cutting plane as the upper spring portion 85 is pushed downwards or moved outwards. By rotational movement (or lateral movement in other preferred embodiments), the guide device can be moved into a horizontal groove to select and determine the corresponding first tension position F1 or second tension position F2. In this configuration, the release position, preferably represented by F0, is when the helical spring body 82 is released to its maximum extent and the upper spring portion 85 is thus deflected upwards to its maximum extent.

[0125] Furthermore, the compression plunger 86 according to this embodiment can engage with a recess in a groove such as the carrier 38 to axially fix the carrier 38 within the support 39 without using the compression member 46 as described above, thereby achieving the same advantages as described above with respect to the compression member 46. This also allows for a simpler design of the support 39. Furthermore, in the preferred position F0, the compressive force of the compression spring 80 can be provided in such a way that the removal of the carrier 38 is simplified by overcoming the small residual compression spring force. Of course, the carrier 38 can also be removed in the tensioned positions F1 and F2, but this requires overcoming the tension of the corresponding compression spring force.

[0126] Figure 6A A side view of an exemplary embodiment of the load carrier 16 is shown, which has Figure 5A and 5B The upper roller 20 is in the closed position, especially the locked position, corresponding to the closed and locked state Z1. Figure 6B It shows having Figure 5A and 5BA schematic side view of an exemplary embodiment of the load carrier 16 of the upper roller 20, in the open position Z2, is shown. This is achieved by the pivoting of the load arm 76 together with the base 30 and the bearing 19, and the resulting rotation of the bearing 37 around the retainer 28. In the closed, locked state Z1, the pivotable portion 72, together with the permanently fixed portion 71, forms a substantially linear guide structure for guiding the pre-compressor 70 of the fiber sliver, enabling the guidance of the fiber sliver, particularly the pre-compressed fiber sliver. In this case, pre-compression can be achieved by the pre-compressor 70 forming a tapered guide structure along the fiber sliver transport direction; in other words, the opening width of the pre-compressor 70 decreases continuously or gradually along the fiber sliver transport direction.

[0127] The opening of the load carrier 16, or its movement in the direction of state Z2 or generally to the open position, allows for an angular position between the permanently fixed portion 71 and the pivotable portion 72. The pivotable portion 72 may be at least partially formed in at least one component, such as the bearing 19 (exemplary case here), the base 30, or the load arm 76. The tilted position causes the fiber sliver guided by the pre-compressor 70 to be clamped, thereby preventing the fiber sliver from slipping out of the pre-compressor 70.

[0128] As also exemplarily shown, the extension 73, particularly configured as a sliver nozzle 75, can be configured to guide the sliver from the rest of the pre-compressor 70 to extend the sliver's guidance in the direction of the drafting device 10 in the operating position (closed and locked state Z1) and to stabilize the sliver, especially during movement toward the drafting device 10. Furthermore, this makes it possible to orient the sliver in the direction of the first upper roller 20 or the input roller 21. As shown, the sliver nozzle 75 can preferably have an opening width that gradually tapers along the sliver transport direction to allow for further compression of the sliver in a defined manner according to a selected opening diameter of the sliver nozzle 75.

[0129] 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.

[0130] 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.

[0131] List of reference numerals

[0132] 10. Drawing device; 37. Bearing

[0133] 16 Load carrier 38 Carrier

[0134] 19 bearings, 39 supports

[0135] 20 Upper roller 40 Moving part

[0136] 21 Upper input roller 41 contact area

[0137] 22 Upper belt roller 42 Spring retainer

[0138] 23 Upper output roller 43 Spring body

[0139] 24 Springs 44 First Spring Arm

[0140] 25 Tracks 46 Compression Parts

[0141] 28 Retainer 47 Slot

[0142] 30 Load carrier base 48 Second spring arm

[0143] 31 Locking device 49 Spring arm support

[0144] 32 Handle 50 Extension direction

[0145] 33 Clamping device 52 Bearing

[0146] 34 Hose 54 Carrier Holder

[0147] 34A funnel element 55 rotary joint

[0148] 35 Lever 56 Connecting rod

[0149] 36 Suction device 57 First groove

[0150] 58 Second groove 80 Compression spring

[0151] 60 connector 82 helical spring body

[0152] 61A First Reference Structure 84 Spring Housing

[0153] 61B Second Reference Structure 85 Upper Spring Section

[0154] 62 Reference surface 86 Compression plunger

[0155] 63 Reference mating surface 87 Groove

[0156] 64 Adjustable distance of the second intermediate field width 88 Spring retainer

[0157] 66 Adjustable distance of the first intermediate field width 90 Torsion spring

[0158] 68 Adjustable distance for input field width 91 Holding device

[0159] 70 Pre-compressor 92 Clamping device

[0160] 71 Permanent fixed part of the pre-compressor 93 Clamping element

[0161] 72. Pivotable part F0 of the pre-compressor in a relaxed state.

[0162] 73 Pre-compressor extension F1 First tension position

[0163] 74 Screw F2 Second tension position

[0164] 75 Fiber sliver nozzle F3 Third tension position

[0165] 76 Load arm L longitudinal axis of the retainer

[0166] 77 Funnel Z1 Closed / Locked State

[0167] 78. Funnel outlet Z2 is open.

[0168] 79 Fiber Sliver Feeding Device

Claims

1. Load carrier (16) for an upper roller (20) of a drafting device (10) of a textile machine, comprising at least one carrier (38) for accommodating at least one of the upper rollers (20), characterized by a spring (24), which is arranged in the at least one carrier (39) and is configured to load the upper roller (20) in a defined manner in a contact direction of the upper roller (20) away from the load carrier (16) after being arranged on the carrier (38), wherein the contact direction is the direction in which the upper roller (20) is arranged to be brought into contact with an assigned lower roller of the drafting device (10) by means of pressure for fiber strip transport, wherein the carrier (38) and the carrier (39) are connected to one another by a rotary joint (55) in order to be able to move the upper roller (20) in accordance with the load of the spring (24).

2. The load carrier (16) according to claim 1, characterized in that The carrier (39) has a spring holder (42, 88) with at least two clamping positions (Fl, F2, F3) for adjusting the load of the upper roller (20) in accordance with the clamping positions.

3. The load carrier (16) according to claim 2, characterised in that, The spring (24) is a torsion spring (90), wherein a spring arm (48) can be arranged in an adjustable manner between the at least two clamping positions (Fl, F2, F3), and wherein the other spring arm (44) is arranged to exert a spring force, in particular directly, onto the carrier (38).

4. The load carrier (16) according to claim 3, characterised in that The carrier (39) has a spring arm carrier (49) which is in particular connected to the spring holder (42) or is integrally configured, wherein the spring arm carrier (49) has a cavity in which at least two seats for the one spring arm (48) of the torsion spring (90) are formed, wherein the at least two seats are each assigned one of the clamping positions (Fl, F2, F3).

5. The load carrier (16) according to claim 1 or 2, characterized in that The spring (24) is a compression spring (80), which is configured and arranged to exert a compression force, in particular directly, on the carrier (38).

6. The load carrier (16) according to claim 5, characterized in that The carrier (39) comprises a spring holder (88), which is configured to hold the compression spring (80) in at least two clamping positions (Fl, F2) along a compression direction of the compression spring (80).

7. The load carrier (16) according to any one of the preceding claims, characterised in that, A first reference structure (61A) on the load carrier (16) and a second reference structure (61B) on the at least one carrier (39), wherein the first reference structure (61A) and the second reference structure (61B) are configured and arranged to define a position of the at least one carrier (39) relative to the load carrier (16) when the at least one carrier (39) is arranged adjacent to the first reference structure (61A).

8. The load carrier (16) according to claim 7, characterized in that The first reference structure (61A) has at least one, in particular milled, reference surface (62) as a stop and the second reference structure (61B) has at least one, in particular milled, reference counter surface (63) as a counter stop.

9. The load carrier (16) according to claim 8, characterized in that The reference surface (62) and the reference counter surface (63) are configured to define the positioning of the at least one support (39) by the mutual contact of the reference surface (62) and the reference counter surface (63) when arranging the at least one support (39) and / or to define the positioning of the at least one support (39) by inserting a calibration piece when arranging the at least one support (39), wherein the calibration piece is configured to be arranged between and in contact with the reference surface (62) and the reference counter surface (63) in order to adjust the position of the at least one support (39) relative to the load carrier (16) in a defined manner.

10. The load carrier (16) according to claim 7 or 8, characterized in that One of the first and second reference structures (61A, 61B) is configured as a protrusion, wherein an end side protrusion surface facing in the direction of the fibre strand transport or opposite to the direction of the fibre strand transport forms the reference surface (62) or the reference counter surface (63), and the other of the first and second reference structures (61A, 61B) forms a recess for accommodating the protrusion which is congruent to the protrusion, wherein an end side recess surface points in the direction of the protrusion surface and accordingly forms the reference counter surface (63) and the reference surface (62), respectively, wherein the reference surface (62) and the reference counter surface (63) are in particular configured to be in contact with each other to position the at least one support (39) or to insert a calibration piece, wherein the calibration piece is configured to be arranged between and in contact with the reference surface (62) and the reference counter surface (63) in order to adjust the position of the at least one support (39) relative to the load carrier (16) in a defined manner.

11. Load carrier (16) according to any one of the preceding claims, characterized in that At least two supports (39), wherein each of the supports (39) has a second reference structure (61B) and one of the two supports (39) has a further second reference structure (61B) or a first reference structure (61A), wherein the second reference structure (61B) is formed and arranged at one of the at least two supports (39) to define the position of the one support (39) relative to the load carrier (16) when the one support (39) is arranged adjacent to the first reference structure (61A), and the second reference structure (61B) is configured and arranged at one of the at least two supports (39) to define the position of the other support (39) relative to the already positioned one support (39) or relative to the load carrier (16) when the other support (39) is arranged adjacent to the first reference structure (61A) or the further second reference structure (61B) of the already positioned one support (39).

12. The load carrier (16) according to claim 11, characterized in that, At least one calibration element is assigned to the load carrier (16) and is configured to be arranged between and in contact with the reference structures (61A, 61B) of two adjacently arranged supports (39) in order to adjust the position of one support (39) relative to the other adjacently positioned support (39) or relative to the load carrier (16) in a defined manner.

13. Load carrier (16) according to any one of the preceding claims, characterized in that At least one recess (57) extends in the direction of fibre strip transport of the drafting device (10) and is laterally delimited by a rail (25), wherein, after assuming a defined position, the at least one support (39) can be fixed to the load carrier (16) in the direction of fibre strip transport by means of the at least one recess (57) and the rail (25).

14. The load carrier (16) according to any one of the preceding claims, characterised in that, A compression element (46) is configured and arranged in the support (39) in such a way that it positions, in particular latches, the carrier (38) on the support (39), further in particular by engaging in a groove (47) of the carrier (38).

15. The load carrier (16) according to any one of the preceding claims, characterised in that, The load carrier (16) has a locking device (31) which is configured and arranged to move the load carrier (16) between a closed state (Z1) and an open state (Z2), in particular by a pivoting movement about a holder (28), and to lock the load carrier (16) in the closed state (Z1) on the drafting device (10) or on the textile machine, wherein the locking device (31) is located downstream of a last support (39) or upstream of a first support (39) in the direction of fibre strip transport.

16. Load carrier (16) according to any one of the preceding claims, characterized in that The load carrier (16) has a base body (30) which is pivotable about a holder (28) of the load carrier (16) and a load arm (76) which is connected to the base body (30), wherein the at least one support (39) can be positioned on the load arm (76).

17. The load carrier (16) according to claim 16, characterized in that The base body (30) is configured and arranged to accommodate, in particular to form, at least a part of a pre-compressor (70), wherein the pre-compressor (70) is configured to supply the fibre strip in a pre-compressed manner to the upper roller (20) which is arranged first in the direction of fibre strip transport on the load carrier (16).

18. The load carrier (16) according to claim 17, characterized in that The load carrier (16) is arranged on a holder (28) which forms a permanently fixed part (71) of the pre-compressor (70).

19. The load carrier (16) according to claim 18, characterized in that The pre-compressor (70) has a pivotable part (72) which is formed and arranged on the base body (30) of the load carrier (16) in order to move together with the base body (30) when transitioning into the open state (Z2) and to form the pre-compressor (70) on the load carrier (16) in its entirety with the permanently fixed part (71) of the pre-compressor (70) in the closed state (Z1) in order to guide the fibre strip unhindered through the permanently fixed part (71) into the pivotable part (72) of the pre-compressor (70).

20. Load carrier (16) according to any one of the preceding claims 16-19, characterized in that, The pre-compressor (70) has an extension (73), in particular a fiber strand nozzle (75), which forms a last component of the pre-compressor (70) in the fiber strand transport direction.

21. Drafting device (10) comprising at least one load carrier (16) according to any one of the preceding claims.

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