WO2017076722A1 - Circular comb having combing bars and a main body - Google Patents

Abstract

The invention relates to a circular comb (2) for a combing machine for combing textile fibers and can be fastened to a shaft (5) of the combing machine, which shaft can be rotated about an axis of rotation (4). The circular comb comprises a circular-comb main body (6), which has an outer circumferential side (7), and a plurality of combing bars (9), which are arranged on the outer circumferential side (7) of the circular-comb main body (6) and which, in the entirety thereof, cover a combing circumferential angle segment and define a combining region of the circular comb (2). The circular-comb main body (6) is of a multi-part design and comprises a plurality of main-body segments (15, 16, 17) directly connected to each other tangentially, wherein each combing bar (9) is associated with one of the main-body segments (15, 16, 17), and each combing bar (9) is mounted on the main-body segment (15, 16, 17) associated therewith.

Description

 Circular comb with comb bars and basic body

The present patent application claims the benefit of German Patent Application DE 10 2015 221 410.9, the content of which is incorporated herein by reference.

The invention relates to a circular comb for a combing machine for combing textile fibers and for attachment to a rotatable shaft about a rotation axis of the combing machine.

Combs for use in combing machines are e.g. in the form of circular or circular ridges known by public prior use, wherein combing elements are arranged on a circular comb main body, which are in engagement with the tuft of the textile fibers to be combed. A comb provided with combing elements along at least part of its circumference is referred to as a circular comb. The active combing area can be, for example, 78 °, 90 °, 1 1 1 ° or 137 ° of the circumference of a surface line of the circular comb. The combing elements may be e.g. to act on needles, pinstripes, sawtooth wire sections, comb teeth or in particular sawtooth stamped parts. Several of these combing elements are usually preassembled to comb bars, which are sometimes referred to as Kämmsegmente or Kämmgarnur. Such a combing bar can thus be used e.g. several axially, i. in the direction of the axis of rotation, successively arranged Sägezahnstanzteile, Sägezahndrah- tabschnitte or toothed toothed discs have.

In order to obtain a good combing result, it is desirable to have a radial distance of the tooth tips of the combing needles or bolts to a pliers unit which is part of the combing machine and which is later selected. During the assembly of the circular comb into the comber, as precisely as possible and, in particular, as low as possible, adjust the comb to be combated. For this purpose, CH 683 190 A5 describes a radially height-adjustable fastening of a circular comb basic body provided with a plurality of combing bars on a roll or holding body of a combing machine. The circular comb main body is held by means of adjusting screws in a continuously adjustable radial distance from the roll or holding body. It is mentioned that, due to the adjustable holder, a concave bending of the circular comb can result in a corresponding change in position of the tooth tips.

Further embodiments of circular combs with a radially height-adjustable attachment of a circular comb basic body provided with a plurality of combing bars on a shaft of a combing machine are known from DE 297 20 656 U1 and EP 2 789 716 A1. In the embodiment described in DE 297 20 656 Ul a spacer element in the form of a washer between the circular comb main body and the shaft is provided. In the embodiment described in EP 2 789 716 A1, the circular comb main body has on its inner side facing the shaft a recess in which a support element for supporting the circular comb main body is arranged on the shaft. Between the recess bottom and the support element there is an exchangeable distan- zelement, by means of the thickness of which the radial position of the circular comb on the shaft can be adjusted to a certain extent.

The known embodiments for the exact positioning of the tooth tips of a circular comb close to the forceps unit of a combing machine are partly complex in the implementation and also cause that the radial end positions of the tooth tips within the combing partly differ noticeably from each other. The object of the invention is to provide a circular comb of the type described above with respect to the previously known embodiments improved properties.

To solve this problem, a circular comb according to the features of claim 1 is given. The circular comb according to the invention comprises a circular comb basic body with an outer circumferential side, a plurality of combing bars arranged on the outer peripheral side of the circular comb main body, which cover in their entirety a combing peripheral angle segment and define a combing area of the circular comb, the circular comb main body is multi-part and comprises a plurality of tangentially directly interconnected main body segments, each combing one of the Gnmdkörper segments is assigned, and each combing bar on the associated Gnmdkörper segment is in particular directly mounted.

Each combing block forms in particular a subunit with a Gnmdkörper segment. The basic body segments, which are arranged in particular tangentially one behind the other and at least some of which in each case directly support a combing bar in particular, can be understood or referred to as fastening strips in particular. In particular, there are at least as many basic body segments as combing bars. The combing circumferential angle segment extends in particular over a tangential angular range of at most 150 °, in one embodiment with a total of six tangentially successively arranged combing segments. for example, over a tangential angular range of about 137 °, in one embodiment with a total of five tangentially successively arranged Kämmriegeln over a tangential angular range of about 1 1 1 ° and in a configuration with a total of four tangentially arranged behind each other Kämmriegeln eg over a tangential angle range of about 90 °.

The main body segments may be e.g. be linked together like a chain link. In addition, there is a direct tangential connection between tangentially adjacent basic body segments, that is to say advantageously without the interposition of other connecting means.

In particular, the circular comb basic body essentially has the basic shape of a circumferential segment of a hollow cylinder, wherein the cylinder axis of the hollow cylinder is a central longitudinal axis of the circular comb main body that coincides in particular with the axis of rotation.

The location or direction information used here relates in particular to the axis of rotation of the shaft or a cylinder coordinate system determined by this axis of rotation. In this respect, "axially" stands for an orientation in the direction of the axis of rotation, "radial" for an orientation perpendicular to the axis of rotation, and "tangential" for an orientation in the circumferential direction about the axis of rotation leads to the fact that the individual basic body segments can be produced much simpler and more precisely than a previously known and used one-piece circular comb main body. Basic body existing tightly localized manufacturing inaccuracies, such as a slight deviation from the predetermined radial dimensions or a slight twisting, with regard to the achievable in the incorporation of this combing provided Kreiskamm basic body pers in the comber positioning accuracy of

Tooth tips not only affect the place of manufacturing accuracy, but virtually anywhere within the combing area. In the worst case, the negative effect due to the effects of leverage far away from the actual points of failure may even be much greater than at the point of failure itself. Therefore considerable effort has to be made in a known one-piece circular comb main body in order to achieve very high production accuracy , Nevertheless, the described negative effects on the positioning accuracy of the tooth tips in the previously known one-piece circular comb basic bodies can not be completely avoided.

In contrast, a basic body segment of the circular comb according to the invention is much easier to produce with the required accuracy, due to its smaller size. In addition, the segmentation prevents localized inaccuracy throughout the combing area from influencing the positioning accuracy of the tooth tips. The error propagation is stopped at the latest at the segment boundaries. Furthermore, a base body segment of the circular comb according to the invention can also be due to its smaller size much easier to assemble with high precision on the shaft than a known larger one-piece circular comb main body. The lower contact surface, with which the circular comb in the mounted state on its counterpart, for example se directly to the shaft (= direct or immediate assembly of the circular comb) or an intermediate wave mounting body (= indirect or indirect mounting of the circular comb), is applied, is preferably also segmented. The smaller partial contact surfaces of the segmented lower contact surface of the circular comb according to the invention can each be applied and mounted with greater precision on the said counterpart than the larger uninterrupted contact surface of a known one-piece circular comb main body. Each of the base segments fits very well with its lower part contact surface on the shaft or on the shaft mounting body, whereby the tooth tips of the respective Kämmriegels come to rest at the desired radial position (= Kämmradius).

In addition, the bearing forces acting in the assembled state of the circular comb at the lower part contact surfaces of the individual base body segments are approximately equal. It thus forms within the moldings of the base body segments and thus within the body in total no significant residual stress, which in turn favors a good alignment or a good nestling of the base body segments on the mating contact surface of the shaft or shaft mounting body.

Overall, it is thus possible to mount the circular comb according to the invention due to the segmentation of his circular comb basic body directly or indirectly on the shaft of a comber, that the tooth tips of the combing bars are positioned exactly radially everywhere and in particular a required small radial distance to the forceps unit of Comber have. The tangential connection of the main body segments is favorable, as this undesirable tangential gaps or distances between tangentially adjacent Kämmriegeln be avoided in the final assembled state. Thus, the combing action remains as intended. In particular, there is no undesirable change or even interruption of the combing effect at the segment boundaries

In particular, the combing bars and the base body segments can advantageously also be preassembled before the circular comb is installed in the combing machine. The combing bolt placed on the base body segment and the respective base body segment then form, in particular, a preassembled subunit of the circular comb. This pre-assembly facilitates the final assembly of the circular comb on site at the comber.

In addition, the segmentation of the circular comb basic body reduces the space required for storage and transport of the circular comb, since the basic body segments can be tightly stacked or sized in the unassembled state. Therefore, a smaller package can be used. In this respect, the circular comb according to the invention also leads to a reduction of logistics costs.

In addition, a subunit of a basic body segment and a single combing bar, in particular due to the smaller volume of construction much easier (partial) mount as an entire circle comb of a known one-piece circular comb base body and all combing bars to be placed thereon. The (partially) assembled subunits are then assembled on site in the comber machine to form the complete circular comb according to the invention. These favorable partial assembly is made possible only by the segmentation of the circular comb basic body.

Furthermore, again due to the segmentation of the circular comb main body in a circular comb according to the invention installed in a combing machine can easily, i. in particular without a special tool or special dismantling device, only a single combing bar can be exchanged. So far this was not possible. An exchange could only be made for the complete circle comb with all comb bars. In the circular comb according to the invention, however, only the subunit can now be dismantled with the relevant combing bar and exchanged for a new subunit. With the new subunit, e.g. a defect or wear in the combing bar of the exchanged subunit can be eliminated. Alternatively, however, it is also possible to install a combing bar with other combing properties with the new subunit in order to specifically adapt the garnish and the combing behavior of the circular comb to a new operating situation of the combing machine in a targeted manner. The circular comb according to the invention with the segmented circular comb basic body thus offers numerous advantages over known circular combs with a one-piece circular comb basic body.

The circular comb according to the invention with the segmented circular comb basic body can be easily retrofitted to existing combers, so that even with such older combing machines can be benefited from the described advantages of the circular comb according to the invention. Advantageous embodiments of the circular comb according to the invention will become apparent from the features of the dependent claims of claim 1.

Favorable is an embodiment in which the main body segments are detachably connected to each other. This facilitates assembly and increases the flexibility of use.

According to a further advantageous embodiment, the base body segments are in particular positively connected to each other at least in the tangential direction. This allows a good power transmission between the main body segments - and within the Kreiskamm- Grundköpers total - in this direction.

According to a further advantageous embodiment, at least some of the basic body segments for tangential connection at a first tangential end are provided with a connection extension and at a second tangential end with a connection opening, wherein the connection extension and the connection opening correspond to each other and the connection extension an undercut to the tangential force - Transmission has. The connection extension provided with an undercut can be embodied, in particular, as a web with a dovetail-shaped or round axial cross-section at the tangential web end, wherein the web is preferably an integrally formed component of the respective base body segment. These geometry shapes allow a very good transmission of force between the main body segments - and within the Kreiskamm basic body in total - in the tangential direction. According to a further advantageous embodiment, the tangential connection between two adjacent basic body segments in the unmontated state permits a relative movement of the adjacent basic body segments relative to one another in the radial direction by up to 0.3 mm, in particular by up to 0.1 mm , This radial play the tangential connection between two adjacent body segments favors in the assembly of the circular comb in the combing machine to a certain extent individual placement of each of the base segments on the mating contact surface of the shaft or shaft mounting body. In particular, the radial position of the base body segment to the base body segment can be changed somewhat. This advantageously achieves a very good nestling of the base body segments on the mating contact surface of the shaft or of the shaft mounting body, which has a favorable effect on the radial position of the tooth tips of the combing bars.

According to a further advantageous embodiment, all basic body segments, on which a combing bar is mounted, designed identical. This results in low production costs. For the main body segments, which particularly affect the radial position of the tooth tips of the combing bars and thus the combing radius and which should therefore be manufactured with particular accuracy, only a single precise shape is required, resulting in low mold costs.

According to a further advantageous embodiment of the circular comb basic body has at its two tangential ends in each case a comb-free base body end segment, which is equipped with fastening means for fixing the circular comb main body on the shaft. The two basic body end segments, which are primarily intended for body assembly, can then be used, in particular, with lower accuracy requirements. conditions with respect to the radial dimensions and the dimensional accuracy of their lower part-contact surface, which is determined in the assembled final state of the circular comb for abutment against the shaft or on the shaft mounting body manufactured. This leads to low production costs.

According to a further advantageous embodiment of the circular comb basic body has at its two tangential ends in each case a basic body end segment on which a combing bar is mounted and which is equipped with fastening means for fixing the base body on the shaft. In this embodiment, the circular comb main body can be constructively designed so that it is particularly lightweight and has an advantageously low inertia.

According to a further advantageous embodiment, at least some of the main body segments are equipped with spacing means for attachment to the shaft which is variable in distance in the radial direction. Although such spacing means are not absolutely necessary in the circular comb according to the invention in order to obtain a desired combing radius in the final assembled state, there may be mounting or mounting situations in which additional measures for radial height adjustment, in particular in the form of the said spacing means, make sense. Such a situation is e.g. the conversion of an existing comber u. a. with the aim to increase the combing quality. For this purpose, it may be useful to measure the distance between the tooth tips and the forceps unit

To reduce the comber, which can be accomplished by means of the spacer means.

According to a further advantageous embodiment, the circular comb main body has an inner peripheral side and the spacing means are as min. at least one firmly on the inner peripheral side, but in particular detachable, mounted or loosely fitting washer performed. The washer is designed in particular as a thin, preferably bendable sheet metal. In one possible variant, the washer has a tangential extent of, in particular, at most that of the main body segment against which it rests. In another preferred variant, however, the washer has a greater tangential extent than each of the main body segments. The washer may extend in the tangential direction, in particular over two or more of the basic body segments, in extreme cases also over all main body segments. The radial height adjustment by means of the washer works particularly well in the circular comb according to the invention, in particular better than in circle combs with one-piece circular comb main body. The reason for this again lies in the segmentation. As a rule, an outer diameter of the often cylindrical segment-shaped counter-contact surface of the shaft or of the shaft mounting body and the inner diameter of the at least substantially hollow-cylindrical segment-shaped lower contact surface of the circular comb main body are adapted to one another. Often, this outer diameter and this inner diameter are the same size or at least approximately the same size. If now a washer is inserted between the mating contact surface and the lower contact surface for height adjustment, the cylindrical surface geometries that are intended for abutment no longer exactly match one another. Assigning the washer as here to the circular comb, is reduced by the insertion of the washer then on the inner peripheral side of the circular comb total resulting inner diameter, so that equipped with a one-piece circular comb main body circular comb is no longer everywhere tight against the mating contact surface. In the worst case, only two narrow contact areas arise at the both tangential ends of the circular comb. In between, however, the one-piece circular comb main body is not on. In contrast, this unfavorable investment behavior resulting from the insertion of a washer does not occur in the circular comb according to the invention with the segmented circular comb main body. Due to their considerably smaller expansion in the tangential direction, the individual base body segments lie substantially fully flat against the mating contact surface even when a washer is inserted. In addition, the segmentation of the circular comb main body enables a comb-bolt-related adaptation of the radial distance of the tooth tips of the respective combing bar to the collet unit by inserting a washer with the desired thickness of the pane only under the relevant base segment. Such an advantageous comb-bar-related distance adjustment is not possible with a one-piece circular comb basic body.

According to a further advantageous embodiment, a plurality of washers arranged tangentially and / or radially one behind the other are applied to the inner circumferential side. Furthermore, it is possible that the washers at least partially have a different slice thickness. In particular, different washers may be present on the individual main body segments. A washer may also be located only below the one tangential end of one of the base body segments. The relevant base body segment then lies obliquely against the curved mating contact surface of the shaft or the shaft mounting surface. Overall, it is thus possible to adapt the distance of the tooth tips to the forceps unit (= forceps spacing) in the tangential direction (= combing direction) to be largely flexible, preferably also inhomogeneous. Thus, the tong distance in the tangential direction, for example wedge-shaped rising or wedge-shaped falling or wedge-shaped rising first and then wedge-shaped falling running.

According to a further advantageous embodiment of the circular comb main body has an inner peripheral side and are at least some of

Basic body segments on the inner peripheral side equipped with fastening means for releasably attaching a particular Unterlegelements. This too is a measure which allows an individual, in particular comb-type adjustment of the tong distance. The attachment of the shim also prevents it from being lost during storage or transport and / or changing position during assembly. The latter would lead to an undesirable padding situation and possibly also at least locally to a different tong distance than actually intended. The fastening means can be designed in particular as clips. Other embodiments are also possible.

According to a further advantageous embodiment, the main body segments are made of aluminum with a tensile strength of in particular up to 310 N / mm ² . Due to the smaller compared to a known one-piece circular comb main body dimensions of the main body segments also used for the production (extrusion) shape is smaller. As a result, it is advantageously possible to use a material with a higher tensile strength of, in particular, up to the stated value. The use of a material having a higher tensile strength makes it possible, in particular, to produce particularly small and / or lightweight main body segments, without sacrificing mechanical properties. The main body segments are in particular extruded and preferably as aluminum Extruded profiles executed. In this case, the accuracy or dimensional accuracy of the extrusion process is particularly so good that a post-processing of the distance-critical points, ie the locations for the radial distance of the arranged on the base segment Kämmriegels of the shaft and / or of the nipper unit of the combing machine are not necessary. The preferably embodied as aluminum extrusion components Gnmdkörper segments are thus advantageously ready for post-processing ready. According to a further advantageous embodiment of the circular comb basic body is equipped with Zugbefestigungsmitteln for its attachment to the shaft and these Zugbefestigungsmittel are adapted to apply the circular comb main body in the mounted state on the shaft with a tangential tensile force. The circular comb can be fitted with particularly exact and within the entire combing area in particular substantially exactly the respective constructive desired radial position of all tooth tips of the combing bolts when the circular comb main body in its (direct or indirect) attachment to the shaft with a tensile force or tensile stress is charged. A tangential tensile force contributes significantly to the fact that the circular comb main body is pressed against the mating contact surface of the shaft or of the shaft mounting body. This Gegenkontaktiläche can also be referred to as a mounting surface. The more accurate, uniform and compared to the underlying circular comb construction position shaker is the location of at least the radially outermost tooth tips, the closer the combing bars can be placed on the combing textile fibers holding forceps unit of the comber and the better the achievable Kämmergebnis , Even if the main body segments due to one of the manufacturing steps still a minor mechanical distortion or distortion or its diameter should have a slight tolerance or inaccuracy of, for example, up to ± 2%, this advantageously has no negative impact on the ultimately resulting in the assembled state of the circular comb Radia- len positions of the tooth tips of the combing bars. Such distortions or tensions can be compensated as well as diameter tolerances due to the Zugkraftbeaufschlagung the circular comb base body and thus also the individual body segments. Due to the tangential connection between the main body segments acts on the circular comb main body acted upon tangential tensile force or tensile stress on each of the main body segments and unfolds in each of the basic body segments described advantageous effect. As a result, the effort in the production of the body segments can be reduced. Certain manufacturing inaccuracies can also be compensated later by the application of a tangential tensile force during assembly of the circular comb. The basic body segments can be manufactured reasonably priced.

According to a further advantageous embodiment of the circular comb basic body has an inner peripheral side and the Zugbefestigungsmittel are at least partially on the inner peripheral side (in particular radially) inward, ie towards the axis of rotation, or on the outer ßenumfangsseite (in particular radially) outwardly projecting and in particular provided with an undercut Zugbefestigungsvorprung, in particular two Zugbefestigungsvorsprünge are present, one of which is preferably arranged at one of the two tangential ends of the circular comb main body. Such Zugbefestigungsvorsprünge allow in a simple manner an application of the circular comb main body with a tensile stress. Preferably the Zugbefestigungsvorsprung can be equipped with a radial direction oblique contact or contact surface, so that the applied tensile stress has both a tangential and a radially inwardly oriented direction component.

According to a further advantageous embodiment, the fastening means are at least partially formed as at least one fastening contact surface, and extends a surface normal of particular as a Ke gelgelgelfläche, preferably as an inner peripheral surface of a tapered bore, formed Befestigungsanlagefläche both with respect to the axis of rotation radial direction as well as related to the axis of rotation tangential direction obliquely or tilted. In particular, the surface normal of the attachment abutment surface with the radial and tangential directions respectively includes an angle from the open angle region

] 0 °; 90 ° [and preferably from the angular range [15 °; 75 °]. Such an oblique or tilted extending mounting surface allows in a simple manner an application of the circular comb main body with a tensile stress. In particular, the fastening means may be at least partially formed as a radially extending through holes in the circular comb main body at least one of its two tangential end portions, wherein at least a portion of the through holes each have a conically widening to the outer peripheral side Bohrungsquerschnittsflä che in the form of a conical seat for receiving a conical screw head a Zugbefestigungsschraube has, so that when mounted Zugbefestigungsschrauben turn advantageously also a tangential tensile force on the circular comb basic body results. Every through hole In particular, each has a substantially through-hole longitudinal axis extending in the radial direction.

According to a further advantageous embodiment, the fastening means are at least partially formed as base threaded holes for screwing Zugbefestigungsschrauben, wherein the base threaded bores starting from a radial boundary surface on at least one of the two tangential ends of the circular comb main body in particular as blind holes in the circular comb main body extend into it. Such Grundköφer threaded holes allow in a simple way an admission of the circular comb main body with a tensile stress.

According to a further advantageous embodiment, the fastening means are at least partially formed as at least one integrally formed on one of the two tangential ends of the circular comb main body receiving lug with an extending in the direction of the rotation axis eyelet passage opening for releasably passing a rotatable eccentric tension rod. Such a receiving eye can be attached to the circular comb main body without much effort. As part of an eccentric mechanism, it also allows in a simple way the Zugkraftbeaufschlagung the circular comb main body.

According to a further advantageous embodiment, at least two outer contact strips running axially in the direction of the axis of rotation and tangentially spaced from one another with respect to the axis of rotation are present on the outer circumferential side of each of the basic body segments, which are assigned a combing bar, the combing bar contact surfaces which the respective combing bolt rests form. Furthermore, at one Inner circumferential side of each of these body segments axially in the direction of the axis of rotation extending radially with respect to the axis of rotation inwardly projecting and tangentially with respect to the axis of rotation spaced inner contact strip present, the only Wel- lenmontage contact surfaces of the respective main body segment to direct or indirect attachment or connection with the wave. In this case, at least some of the outer contact strips are each assigned to one of the inner contact strips and each form a pair of strips with this. Furthermore, the outer contact strip and the inner contact strip of each of the pairs of strips at least partially overlap in their tangential extent, and at least two pairs of strips are present per basic body segment to which a combing bar is assigned. The circular comb can be fitted with particularly exact and within the entire combing area, in particular substantially exactly the respective constructively desired radial position of all tooth tips of the combing bars, if on the inner and on the outer circumferential side of the main body segments couples with in particular radially opposed contact surfaces, which preferably have at least partially matching tangential positions and / or positional areas are present. The more accurate, uniform and, compared to the underlying circular comb construction, the position of at least the radially outermost tooth tips, the closer the combing bars can be placed to a combing machine holding the textile fibers of the combing machine and the better the result is. achievable combing result.

On the outer circumferential side of the basic body segments, the combing bars lie on the contact surfaces formed by the outer contact strips. special immediately. Therefore, these contact surfaces are also referred to as combing-bar contact surfaces.

On the inner peripheral side, the contact surfaces are formed by the inner contact strips, which protrude in particular in the direction of the axis of rotation. At least within the combing area, these inner contact strips on the inner peripheral side of the circular comb main body form the only, and / or especially exclusive, contact surfaces for mounting the main body segments on the shaft. In this case, the circular comb main body can rest either directly on the shaft with these shaft mounting contact surfaces or by means of at least one additional mounting component arranged therebetween, such as, for example by means of a shaft mounting body, in particular a retaining flange or holding body, only indirectly communicate with the shaft. Apart from the shaft mounting contact surfaces no further contact between the circular comb main body on the one hand and the shaft or an additional mounting component on the other hand, at least within the Kämmbereichs. The tangential spaces between two adjacent inner contact strips are thus in particular contact-free.

The outer contact strip and the inner contact strip of a pair of strips are preferably radially opposite each other. In particular, the outer contact strip has at least one outer contact strip subarea which, in its tangential position and extent, coincides with at least one inner contact strip subarea of the inner contact strip. These mutually tangentially overlapping portions of the outer and inner contact strips of a pair of strips are radially opposite each other. At least two, in particular two to ten, preferably two to five, of such strip pairs are present per basic body segment to which a combing bar is assigned. Within such basic body segments, at least two partial regions with in the radial direction in particular continuous (uninterrupted) material connection between the inner and the outer peripheral side are present. These subregions with in particular a continuous material connection in the radial direction open on the inner and the outer peripheral side into the contact surfaces of the respective main body segment formed by the outer contact and inner contact strips to the associated combing bar or in the direction of the shaft. Thus, a radial connection distance to the shaft at at least two tangentially spaced locations is determined very precisely for each combing bolt. This connection distance is determined in particular by the radial distance between the contact surfaces on the outer and inner contact strips significantly. It can thus be adjusted already during the manufacture of the base body segments by the production of the outer and inner contact strips. Even if the main body segments due to one of the manufacturing steps still a slight mechanical distortion or distortion or their diameter should have a slight tolerance or inaccuracy of, for example, up to ± 2%, this advantageously has no negative impact on the final in the assembled state of Circular comb resulting radial positions of the tooth tips of the combing bolts. Such twisting or tension as well as diameter tolerances can be compensated by means of the inner contact strips due to the contacting of a mounting surface only in regions or singularly. This favorable distortion or stress compensation and / or the compensation of diameter tolerances can be achieved or can be achieved in particular thereby. chen that the basic body segments of the circular comb basic body in the (direct or indirect) attachment to the shaft with a suitable, preferably tangential, tensile stress is applied. Also in this respect, the effort in the production of the body segments can be reduced. Certain production inaccuracies can also be compensated later in the assembly of the circular comb. The basic body segments can therefore be manufactured inexpensively.

Due to the fact that the outer and the inner contact strips are attached to the same component, namely the respective main body segment, the coincidence of the tangential position / extent of the associated outer and inner contact strips of each of the pairs of strips can already be during the production of the main body Segments are ensured. At this stage, this is associated with comparatively little effort despite the achievable very high positional fidelity. In contrast, a higher cost would be incurred if - which would also be possible in principle - the associated outer and the inner contact strips are attached to different components and the coincidence of the tangential position / extent only at a later stage, e.g. only during assembly of the body segments on the shaft, is ensured.

A further embodiment is expedient in which exactly two pairs of strips are present per basic body segment to which a combing bar is assigned. As a result, a mechanically defined bearing and support for the shaft are available for each combing bar. In addition, such a basic body segment is particularly inexpensive to manufacture, since then only two dimensions high accuracy requirements are to be met. According to a further advantageous embodiment, each per base body segment, which is associated with a combing bar, each two pairs of edge strips formed as pairs, wherein each of the Randstreifenpaare a tangential distance from a tangential segment edge of the relevant Grundkörper- segment is in particular smaller than a tangential distance between the two edge strip pairs. This results in a mechanically particularly stable storage and support to the shaft for each combing bar. In addition, the edge strip pairs can in particular also be arranged in each case exactly at the tangential bolt edge, ie directly adjacent to the tangential bolt edge.

According to a further advantageous embodiment, the outer contact strips and the inner contact strips are each arranged tangentially at the same position at least in one of the strip pairs and have the same tangential extent. In such preferred pairs of strips, the mutually associated outer and inner contact strips and also formed by them on the outer and inner peripheral surface of the respective Grundkörper- segment contact surfaces are exactly opposite each other radially, whereby for this basic body segment associated combing a particularly efficient storage and support results towards the wave. There are no contact surface portions which lack a counterpart on the opposite peripheral surface.

According to a further advantageous embodiment, the projections of the inner contact strips have a perpendicular to the axis of rotation measured radial projection height of between 0.25 mm and 5 mm, in particular of between 0.5 mm and 2 mm. On the one hand, this height is high enough that any mechanical distortions or distortions or diameter tolerances of the relevant base body segment during assembly, for example be balanced by a corresponding tensile load, and on the other hand not so high that mechanical instabilities occur. According to a further advantageous embodiment, the projections of the inner contact strips have a radial projection height, measured perpendicular to the axis of rotation, of between 0.25 mm and 35 mm, in particular between 0.5 mm and 25 mm. In this embodiment, the base body segments are in the assembled state in particular directly on the shaft and then preferably have a relatively large radial extent, in particular to comply with the specifications for the radial distance of the tooth tips of the axis of rotation. In this respect, the projection height can assume larger values of, for example, more than 10 mm and in particular of up to a few 10 mm.

In particular, the invention also relates to a circular comb unit for a combing machine for combing textile fibers, this circular comb unit comprising a shaft rotatable about an axis of rotation and a circular comb according to the invention described above or one of the favorable embodiments of this circular comb according to the invention also described above. The circular comb unit has at least one mounting surface arranged concentric with the axis of rotation for fastening the circular comb or its favorable configurations on the shaft, against which the circular comb main body rests with its inner peripheral side. In particular, the mounting surface can be a smooth (ie, not provided with a surface structuring) cylinder-segment-shaped surface, which is in particular free of projections or depressions. It may either be part of the shaft or, in particular, part of an at least partially between the shaft and the circular comb. Body be placed fastening mechanism. In this respect, the attachment of the circular comb basic body to the shaft can thus be configured, in particular, indirectly or directly. Moreover, it is favorable if the cylinder-segment-shaped mounting surface has a high concentricity and / or rotational symmetry with respect to the axis of rotation. In particular, the mounting surface satisfies the basic tolerance level IT7 according to the standard DIN ISO 286-1: 1990-1 1 or according to the successor version EN ISO 286-1: 2010-1 1. According to an alternative embodiment, the mounting surface can also be provided with a surface structuring Be surface, which has a cylinder segment basic shape, which in particular has additional projections and / or depressions.

The circular comb unit according to the invention has substantially the same advantages which have already been described above in connection with the circular comb according to the invention and its favorable embodiments.

Further features, advantages and details of the invention will become apparent from the following description of exemplary embodiments with reference to the drawing. It shows:

1 shows an exemplary embodiment of a circular comb unit of a combing machine with a circular comb fixed tangentially to a shaft comprising a segmented circular comb main body in a plan view of an axial end face,

Fig. 2 shows a detail of an alternative embodiment of a

Circular comb with a segmented circular comb main body in a plan view of an axial end face, a further embodiment of a tangible braced on a shaft circular comb of a circular comb unit of a comber comprising a segmented circular comb main body in a plan view of an axial end face

Fig. 4 shows another embodiment of a circular comb unit of a

Combing machine with a circular comb fixed tangentially to a shaft comprising a segmented circular comb main body in a plan view of an axial end face,

5 shows an exemplary embodiment of another fastening mechanism provided for tangentially tensioning the circular comb on the shaft with a tension-bolt anchoring block in a sectional representation of a plan view of an axial end face,

Fig. 6 shows an embodiment of another for tangentially tensioned attachment of the circular comb on the shaft provided fastening mechanism with a conical head screw assembly in one

Sectional view of a plan view of an axial end face,

Fig. 7 shows an embodiment of another for tangentially tensioned attachment of the circular comb on the shaft provided fastening mechanism with an eccentric mechanism part in a

Sectional view of a plan view of an axial end face,

8 shows a further embodiment of a circular comb unit of a

Combing machine with a tangentially clamped on a shaft fixed circular comb comprising a segmented circular comb base body and a washer in a plan view of an axial end face, Fig. 9 shows a further embodiment of a circular comb unit a

Combing machine with a tangentially braced on a shaft mounted circular comb comprising a segmented circular comb main body and a plurality of washers in a plan view of an axial end face, and

10 shows an embodiment of an alternative embodiment of a

Basic body segment of a segmented circular comb main body with a plugged in lower element in a plan view of an axial end face.

Corresponding parts are provided in FIGS. 1 to 10 with the same reference numerals. Also details of the embodiments explained in more detail below may constitute an invention in itself or be part of an inventive subject matter.

In Fig. 1, a first embodiment of a circular comb unit 1 of a combing machine for combing textile fibers is shown. The circular comb unit 1 comprises a circular comb 2, a fastening mechanism 3 and a shaft 5 rotatable about an axis of rotation 4. The axis of rotation 4 can also be understood in particular as the central longitudinal axis of the circular comb unit 1. With reference to the axis of rotation 4, a cylindrical coordinate system is provided with an axial direction z oriented along the axis of rotation 4, with a direction r oriented in the direction of distance from the axis of rotation 4, and with a tangential direction circumferentially about the axis of rotation 4 Direction φ defined. The circular comb 2 is fixed on the rotatable shaft 5 by means of the fixing mechanism 3. The circular comb 2 comprises a circular comb basic body 6 with an outer circumferential side 7 and an inner peripheral side 8 and a plurality of combing bars 9 with comb teeth 10 arranged on the outer circumferential side 7 in the exemplary embodiment shown and intended for meshing engagement with the fiber tuft of the textile fibers. The combing bars 9 can be constructed differently. In particular, the comb teeth 10 of the combing bars 9 can have different shapes and spacings and be present in different numbers.

The tooth tips 1 1 of the comb teeth 10 have a rotation axis 4 called a combing radius KR distance. In addition, the tooth tips 1 1 spaced by a forceps distance D from a lower edge of a top nipper 12. The upper nipper 12 together with a lower nipper 13, a forceps unit 14 of the combing machine. By means of this forceps unit 14 of (not shown) tuft of the textile fibers to be combed is maintained. The more accurate and uniform the forceps distance D within the entire combing area of the circular comb 2, the closer the tooth tips 11 can be moved to the lower edge of the upper forceps 12 and the better and more constant is the combing result that can then be achieved. The combing area of the circular comb 2 is defined by the entirety of the combing bars 9. The entirety of the combing bars 9 cover a combing circumferential angle segment KS which forms the active combing area and can assume, for example, a value of 78 °, 90 °, 11 ° or 137 °, but also other values in the range between 75 ° and 150 ° , In the embodiment shown with five combing bars 9, the combing circumferential angle segment KS covers an angular range of approximately 11.1 °. The tong distance D moves in particular in the area between 0.15 mm and 0.9 mm. The circular comb unit 1 shown in FIG. 1 and the associated circular comb 2 are distinguished by a particularly exact, uniform and position-scattering combing radius KR at least of the tooth tips 1 1 of all combing bars 9 removed furthest from the axis of rotation 4, so that these tooth tips 1 1 contribute The circular comb unit 1 and in the case of the further circular comb units described below can advantageously be placed closer to the tong unit 14, in particular by up to 0.2 mm, compared to conventional circular comb units. In particular, the tong distance D is between 0.2 mm and 0.3 mm, and preferably within the entire combing area. Accordingly, a very low tolerance value of only about 0.1 mm is advantageously given over the combing area as a whole, which could not previously be achieved with conventional circular comb units. To achieve this, the circular comb 2 and in particular its circular comb main body 6 are designed in a special way. The circular comb main body 6 is segmented and consists of several components in the form of main body segments 15, 16 and 17 together. In the embodiment shown, the circular comb main body 6 comprises a total of five tangentially interconnected basic body segments, namely the three central identical basic body segments 15 and the two disposed at the tangential ends Grundkörper- end segments 16 and 17, each with an integrally formed Zugbefestigungsansatz 16a or 17a are provided. On each of the basic body segments 15 to 17 each one of the combing latch 9 is attached. The preferably direct tangential connection between two mutually adjacent of the main body segments 15 to 17 is in each case releasably and positively designed in the tangential direction. Thus, the main body segments 15 and 16 have at their one tangential end each because an integrally formed connection extension 18 and the base body segments 15 and 17 at their other tangential end in each case corresponding to a connection extension 18 in the interior widening connection opening 19. The tangential positive connection results from an engaging in the expansion of the respective connection opening 19 undercut The undercut connection extension 18 of one of the main body segments 15 and 16 is to form the tangential positive connection with its adjacent base body segment 15 or 17 in its widening connection opening 19 axially inserted. This results in a particular chain link-like connection of the base body segments 15 to 17. In the radial direction, the tangential interlocking connections between each two mutually adjacent of the main body segments 15 to 17 a radial clearance of eg up to about 0.2 mm. As a result, in the uninstalled state of the circular comb 2, a radial relative movement between adjacent one of the base body segments 15 to 17 is made possible by the stated value of the radial play.

Due to the segmentation of the circular comb main body 6, a very accurate and radial position-true mounting of the circular comb 2 on the shaft 5 is possible, so that in particular the forceps distance D between the tooth tips 1 1 and the forceps unit 14 very accurately according to the design-related requirements, eg a uniform tongs distance D in the entire combing area and / or a very low tongs distance D with the aim of the highest possible combing quality is achieved. FIG. 2 shows a section of a further exemplary embodiment of a circular comb 21 with a segmented circular comb main body 22. Of the circular comb main body 22 only a central body segments 23, on which a combing bar 9 is mounted, is shown. In contrast to the segmented circular comb basic body 6 according to FIG. 1, the basic body segments 23 of the circular comb main body 22 are equipped with connection projections 24 configured somewhat differently and with corresponding other connecting openings 25. Although the connection extension 24 has an undercut 26 and also the connection opening 25 in the interior of a widening, so that even in the circular comb main body 22 as in the circular comb main body 6 is a tangential positive connection between two adjacent the base segments 23 given or at least can be produced. However, the connecting extension 24 formed on a tangential end on the base body segment 23 has the shape of a web with a round axial cross section at the tangential web end.

The main body segments 23 of the circular comb basic body 22 have respective defined and in particular singular contact surfaces both with respect to their associated combing bar 9 and to a mounting surface 27 of the fastening mechanism 3 (in this case in the axial direction).

Each main body segment 23 has on its outer circumferential side 7, inter alia, two outer contact strips 28 and 29, which extend in the axial direction z and are spaced apart in the tangential direction φ. Between the two outer contact strips 28 and 29 is a recess 30 with a radially projecting mounting lug 31. The outer contact strips 28 and 29 form Kämmriegel contact surfaces, in which the concerned combing latch 9 is applied. The fastening lug 31 engages around a corresponding latch holding projection 32 of the combing bolt 9.

On the opposite inner circumferential side 8, the main body segment 23 is also provided with contact strips, namely with the inner contact strips 33 and 34. The latter also extend axially in the direction of the axis of rotation 4, jump radially inwards, i. So in particular in the direction of the axis of rotation 4, before and are tangentially separated by a recess 35 from each other. The inner contact strips 33, 34 are formed by projections on the inner peripheral side 8. They represent the only contact surfaces of the base body segment 23 to the mounting surface 27 of the fastening mechanism 3 provided for attachment to the shaft 5. In this respect, these inner contact strips 33, 34 form shaft mounting contact surfaces.

Since the fastening mechanism 3 (see also FIG. 1) is interposed, the inner contact strips 33, 34 are indirectly connected to the shaft 5. In other embodiments, which are realized without a fastening mechanism 3 or have a different fastening mechanism, the Inner contact strip 33, 34 but also lie directly on the shaft 5 and thus form a direct connection with the same. In these alternative embodiments, then forms the peripheral surface of the shaft 5, the mounting surface on which the circular comb main body with its inner peripheral side 8 is applied.

In the assembled state between the inner contact strips 33, 34 due to the recess 35, a hollow or gap formed, which separates the inner contact strips 33, 34 from each other. This gap is non-contact. In the area of this gap there is no contact between see the circular comb base body 22 and the opposite mounting surface 27th

Each of the two outer contact strips 28, 29 is in each case assigned to one of the two inner contact strips 33, 34. The outer contact strip 28 and the associated inner contact strip 33 and the outer contact strip 29 and the associated inner contact strip 34 each form a pair of strips 36 and 37. The outer contact strip 28 and the associated inner contact strip 33 of the strip pair 36 are opposite each other. They overlap at least partially in their respective tangential extent. The same applies to the outer contact strip 29 and the inner contact strip 34 of the second pair of strips 37. In particular, the circular comb main body 22 in the region of the pairs of strips 36, 37 each in the radial direction r continuous material connection or bridge between see the on the outer peripheral side 7 and The radial distances di and d ₂ between these outer and inner contact surfaces of the circular comb base body 22 can be set and finished very accurately. This also applies if the circular comb main body 22, as in the exemplary embodiment shown, is designed as an aluminum extruded profile, which is anodized for curing purposes, inter alia, and has a tensile strength of up to 310 N / mm ² . Thus, the segmented circular comb main body 22 shown is an inexpensive to manufacture component, but at the same time with the opposing outer contact strips 28, 29 and inner contact strips 33, 34 of the strip pairs 36, 37 on highly accurate radial distance dimensions di, d ₂ has. In the embodiment shown, the distance dimensions di, d ₂ each have a value of between 5 mm and 10 mm, in particular between 6 mm and 8 mm and preferably of about 7 mm. The two strip pairs 36, 37 are each an edge strip pair, which is arranged in each case close to a tangential latch edge 38 or 39. The tangential distance φι of the pair of strips 36 from the rim edge 38 and the tangential distance φ ₂ of the pair of strips 37 from the locking edge 39 are each smaller than a tangential distance φ ₃ between the two pairs of strips 36, 37.

The contacting of the segmented circular comb basic body 22 with the adjoining components, ie the combing bars 9 and the multipart mounting surface 27 explained here on the exemplary embodiment of the circular comb 21 according to FIG. 2, are in the same or similar manner in the circular comb unit 1 or the circular comb 2 realized according to FIG. 1. The same also applies to the further embodiment shown in FIG. 3 of a circular comb unit 40 of a combing machine with a tangentially braced on the shaft 5 fastened circular comb 41, which also includes a segmented circular comb main body 42. The latter has six basic body segments 43, 44 and 45 each equipped with a combing bar 9, of which the four central basic body segments 43 are identical and provide the two tangential basic body end segments 44 and 45 respectively with an integrally formed tensile attachment lug 46 and 47 are. In the six comb comb 9 comprehensive circular comb 41 covers the comb-circumferential angle segment KS an angular range of about 137 °.

Adjacent the main body segments 43 to 45 are in turn connected tangentially directly and positively with each other. This likewise releasable form-locking connection is in the segmented circular comb basic body. realized by 42 at the tangential ends of the base body segments 43 to 45 integrally formed hook-shaped and in particular undercut connecting lugs 48 and 49, wherein the connecting lugs 48 and 49 adjacent the main body segments 43 to 45 engage each other. Also in these form-fitting connections described in connection with the segmented circular comb main body 6 radial clearance between adjacent the main body segments 43 to 45 is present.

The circular comb 41 also has an alternative attachment of the six combing bars 9 on the Grundkörper- segments 43 to 45. In the recess 30 between the two outer contact strips 28 and 29 of the present in this embodiment for abutment with the adjacent components strip pairs 36, 37 are two projecting fastening lugs 50, 51 with tangentially oppositely oriented oblique Nasenhalteilächen 52, 53 which abut corresponding oblique Riegelhalte- surfaces 54, 55 of the respective Kämmriegels 9 and fix the combing bar 9 so securely on the respective main body segment 43, 44 or 45. The two fastening lugs 50, 51 form with their oppositely oriented oblique nose-throat surfaces 52, 53 a dovetail-like fastening geometry.

The main body segments 43 to 45 have on their inner circumferential side 8 in addition to the inner contact strips 33, 34 of the pairs of strips 36, 37 in particular straight in the region of protruding on the outer peripheral side 7 mounting lugs 50, 51 each have a further inner contact strip 56. These further inner contact strip 56th are optional. They cause an additional support function. FIG. 4 shows a further exemplary embodiment of a circular comb unit 57 of a combing machine with a circular comb 58 fixed tangentially to the shaft 5 and also comprising a segmented circular comb main body 59. The latter has five each equipped with a combing bar 9 central identical body segments 60 and at its two tangential ends two basic body end segments 61 and 62, which are not provided with Kämmriegeln, but each have an integrally formed Zugbefestigungsansatz 63 and 64 respectively. Neighboring the base body segments 60 to 62 are in turn tangentially directly and positively connected to each other, wherein a similar dovetail-shaped connection geometry is provided as in the segmented circular comb main body 6 of FIG. 1st

By means of the circular combs 2, 21, 41 and 58, the tooth tips 1 1 can be very uniform, in particular due to the respectively provided segmented circular comb main body 6, 22, 42 and 59, i. with substantially the same combing radius KR, and position very precisely.

In the following, with reference to FIGS. 1, 4 and 5 to 7, various possibilities for tangentially tensioned fixation of the circular combs 2, 21, 41 and 58 on the shaft 5 are explained.

For attachment of the circular comb main body 6, 22, 42 and 59 and thus also the circular combs 2, 21, 41 and 58 total on the shaft 5 and for acting on the circular comb main body 6, 22, 42 and 59 with a tangential tensile force Fi the circular comb basic body 6, 22, 42 and 59 equipped with Zugbefestigungsmitteln. The latter are formed as outwardly projecting on the outer peripheral side 7 Zugbefestigungsvorsprünge 65 and 66. The tension fastening projections 65 and 66 are respectively at the tension attachment lugs 16a and 17a (Figure 1), 46 and 47 (Figure 3) and 63 and 64 (Figure 4) of the body end segments 16 and 17 (Figures 1), 44 and 45 (Figure 3) and 61 and 62 (FIG. 4) and in particular integrally molded components thereof.

Furthermore, the attachment mechanism 3 is provided for shaft attachment and Zugkraftbeaufschlagung. It comprises several components, not all of which are shown in the figures. In particular, the attachment mechanism 3 has a plurality of holder bodies 67, which are arranged axially one behind the other and are designed as holding plates, whose narrow side has the shape of a cylinder segment. These narrow sides of all holding body 67 together form the multi-part mounting surface 27, on which the Kreiskamm- Grundkörp he 6, 22, 42 and 59 in the manner described above, in particular with their inner contact strips 33, 34 rest. The plate-shaped holding body 67 are executed in the embodiments shown as aluminum injection-molded or aluminum die-cast components, resulting in a low weight results. The mounting surface 27 forming cylinder segment-shaped narrow sides of the holding body 67 are made precisely and dimensionally stable.

In addition, the mounting mechanism 3 includes two retaining clips 68 and 69. Both retaining clips 68 and 69 extend at their upper end hook-shaped, whereby a clip nose 70 and 71 is formed, which engages the respective Zugbefestigungsvorsprung 65 and 66 respectively. Optionally, the clip nose 70 or 71 can also engage in an undercut which may be present on the pull fastening projection 65 or 66. Also optionally may be present on the Zugbefestigungsvorsprung 65 or 66, an oblique engagement surface and at the associated clip nose 70 and 71 a corresponding thereto also oblique engagement counter surface, the abut each other. The retaining clips 68 and 69 can be displaced by means of clamping screws 72 and 73 in their position. The exact positioning, mounting and number of the staple screws 72 and 73, which are also components of the attachment mechanism 3, may vary depending on the application and the type of combing machine.

As a further component of the fastening mechanism 3, in particular, a counterweight 74 attached to the shaft 5 is provided. The attachment to the shaft 5 by means of a clamping and / or screw connection not shown in detail. In another embodiment, not shown, the counterweight can not be part of the attachment mechanism 3, but be provided independently.

As already mentioned, the positions of the retaining clips 68 and 69 and in particular those of the clip tabs 70 and 71 can be changed, in particular so that the desired tangential tensile force Fi is exerted on the respective circular comb main body 6, 22, 42 and 59. By means of the clamping screws 72 and 73, the forces by means of which the clamping lugs 70 and 71 on the Zugbefestigungsvorsprung 65 and 66 attacks or pulls, preferably continuously changed and adjusted according to the desired specifications. As a result, the respective circular comb basic body 6, 22, 42 and 59, including its basic body segments 15-17, 23, 43-45 and 60-62, is subjected to an adjustable tangential tensile stress. A tangential tensile force Fi acting on the circular comb basic body 6, 22, 42 and 59 in question is opposed by an opposing holding force F _{2 of} equal magnitude and applied by the bearing (not shown) of the retaining clips 68 and 69. By means of the retaining clips 68 and 69 and the tangential tensile force Fi applied by them, the meeting the circular comb basic body 6, 22, 42 and 59 on the one hand securely fixed to the shaft 5. On the other hand causes the applied tangential tensile force Fi in conjunction with the segmentation of the circular comb basic body 6, 22, 42 and 59, that each of the main body segments 15-17, 23, 43-45 and 60-62 according to the particular exclusively at the location of the relevant base body segment 15-17, 23, 43-45 and 60-62 prevailing conditions individually conforms to the mounting surface 27. Small deviations between adjacent base body segments 15-17, 23, 43-45 and 60-62 are caused by the existing radial clearance of the tangential positive connection between adjacent base body segments 15-17, 23, 43-45 and 60-62 balanced.

Furthermore, the tangential tensile force Fi equally acting at each circumferential position and due to the tangential connection within each of the body segments 15-17, 23, 43-45 and 60-62 results in (slight) elongation of the respective one of the circular comb main body 6, 22, 42 and 59 in the tangential direction φ, which preferably favors a close nestling of the base body segments 15-17, 23, 43-45 and 60-62 to the mounting surface 27, in particular by any unintentional resulting in the course of the manufacturing process Tension or twist or diameter tolerances of the base body segments 15-17, 23, 43-45 and 60-62 be compensated. This compensation is particularly efficient when the base body segments 15-17, 23, 43-45 and 60-62 preferably not over the entire surface, but as in the embodiments of FIG. 1 to 4 only singular means of arranged on its inner peripheral side 8 inner contact strip 33, 34 bears against the mounting surface 27. It is also favorable that in the area of the inner contact strips 33, 34, ie in the region of the pairs of strips 36, 37, which are in the radial direction r within each of the main body segments 15-17, 23, 43-45 or in the radial direction 60 continuous material connections or bridges to the provided on the outer peripheral side 7 contact surfaces to the respective combing bar 9 are present. As a result, the (radial) position of each Kämmriegels 9 and thus all the tooth tips 1 1 is also well defined and especially for a large applied tensile stress.

These described advantageous measures (ie in particular segmentation of the circular comb main body 6, 22, 42 and 59, and preferably loading with tangential tensile force, singular abutment surfaces of the circular comb basic body 6, 22, 42 and 59 on the mounting surface 27 and within each of the basic body Segments 15-17, 23, 43-45 and 60 two radially continuous material bridges between the contact surfaces on the outer peripheral side 7 and on the inner peripheral side 8) contribute significantly to at least in that the tooth tips 1 1 compared with the theoretical specifications of the construction documents the practical implementation see, so after mounting on the shaft 5, have a very high positional fidelity.

The tangential tensile stress or tensile force Fi leads in connection with the close nestling of the respective circular comb base body 6, 22, 42 and 59 on the mounting surface 27, advantageously also on the respective circular comb body 6, 22, 42 and 59 acting radially inwardly directed contact force, so that in particular the attachment lugs 31 and 50, 51 pulled inward and against the corresponding latch retaining projection 32 and against the corresponding latch retaining surfaces 54, 55 of the respective Kämmriegels 9 are pressed. The force exerted by the fastening lugs 31 or 50, 51 on the bolt holding projection 32 or on the bolt holding surfaces 54, 55 can preferably be so great that separate other fastening means, such as fastening strips and / or screws, for fastening the combing bolts 9 on the relevant of the circular comb basic body 6, 22, 42 and 59 can be omitted. This results in assembly and cost advantages. This aspect in itself represents its own invention.

FIGS. 5 to 7 show other exemplary embodiments for acting on a circular comb main body with a corresponding tangential tensile stress. FIG. 5 shows a section of a circular comb unit 75, which contains a circular comb 76 with a segmented circular comb main body 77. Shown is only the region of the one tangential end of the circular comb 76, in which tensile fastening means for tangentially tensioned fixation of the segmented circular comb main body 77 on the shaft 5 are present. These Zugbefestigungsmittel are designed differently than those of the circular combs 2, 21, 41 and 58th

At the tangential basic body edge 78 of the circular comb main body 77 or its main body end segment 79 shown in FIG. 5, a tension member 80 is placed. There is at least one Grundköφer threaded hole 81 which extends from the radial boundary surface on this tangential body edge 78 as a blind hole in the material of the Grundkörper- end segment 79. This at least one base threaded hole 81 provides a Zugbefestigungsmittel the circular comb main body As a corresponding pull-fastening countermeasure, in this embodiment, the fixing mechanism 3a comprises a pull-bolt anchoring block 82 and at least one pull-fixing screw 84 inserted through a through-hole 83 provided in the draw-bolt anchoring block 82. The pull-screw anchoring block 82 extends outside of the combing area Mounting surface 27 of the holding body 67 radially outward. It is suitably attached to the holding body 67. The circular comb main body 77 can be acted upon by more or less wide screwing the Zugbefestigungsschraube 84 in the main body threaded bore 81 with the desired tangential tensile stress or tensile force Fi. FIG. 6 shows a section of a further circular comb unit 85, which contains a circular comb 86 with a segmented circular comb main body 87. Shown again is only the tensile fastening means for tangentially tensioned fixation of the circular comb main body 87 on the shaft 5 comprehensive area around the one tangential end of the circular comb 86th

The fastening mechanism 3b provided for fastening the circular comb basic body 87 on the shaft 5 here has a holding body 67 with a sufficient axial thickness to accommodate a plurality of threaded bores 88 placed axially one behind the other for screwing in tensioning screws 89 each having a conical head 90 ,

In the main body end segment 91 of the circular comb basic body 87, through holes 92 are provided in the region of the tangential basic body edge 78 present, which widen conically towards the outer peripheral side 7 and at least in this outer region have the shape of a conical seat. The circular comb main body 87 is in the final assembled state at least in part by means of the inserted through the through holes 92 and screwed into the threaded holes 88 Zugbefestigungsschrauben 89 attached to the mounting surface 27 of the holding body 67.

In a (not shown in Fig. 6) otherwise (partial) fixation of the circular comb main body 87 on the holding body 67, for example, at the other tangential end of the circular comb main body 87, and at the same time not screwed Zugbefestigungsschrauben 89 aligned the axes of the threaded holes 88 not with the axes of the respective associated through holes 92. Rather, there is a small tangential offset. The axis of each of the threaded bores 88 is located tangentially farther away from the combing area than the axis of the through bore 92 corresponding to this threaded bore 88. In the fully assembled state with the tension fastening screws 89 screwed in, this tangential offset no longer exists. Due to a tensile force-related slight tangential stretching of the circular comb main body 87, the axes of the threaded bores 88 are then aligned substantially with those of the respectively associated through bores 92.

The conical heads 90 of the Zugbefestigungsschrauben 89 sit in the final assembled state in the conical portion of the through holes 92. The further the Zugbefestigungsschrauben 89 are screwed into the threaded holes 88, the deeper are the conical heads 90 of the Zugbefestigungsschrauben 89 within the conical seats of the through holes 92 and the greater is the tangential tension or Pulling force Fi, which is thereby exerted on the circular comb main body 87 and causes its aforementioned tangential extension.

The inner circumferential surface of the conical region of the through-bores 92 thus form in each case obliquely with respect to the radial direction r and also with respect to the tangential direction φ extending fastening contact surfaces. Accordingly, the outer peripheral surfaces of the conical heads 90 of the tension fastening screws 89 are attachment abutment surfaces which are also oblique with respect to the radial direction r and to the tangential direction φ. These surfaces thus constitute tensile fastening means and tensile fastening counteracting means for acting on the circular comb basic body 87 with the tangential tensile force Fi. FIG. 7 shows a section of a further circular comb unit 93 which contains a circular comb 94 with a segmented circular comb main body 95. Shown again is only the Zugbefestigungsmittel for tangentially tensioned fixation of the circular comb base body 95 on the shaft 5 comprehensive area around the one tangential end of the circular comb 94th

At the tangential body edge 78 of the circular comb main body 95 to its zugkraftbeaufschlagter attachment an eccentric mechanism is present. The eccentric mechanism is a part of the attachment mechanism 3c. At the base body edge 78 of the circular comb basic body 95 or its basic body end segment 96 a plurality of axially arranged in succession receiving eyelets 97 are integrally formed. Correspondingly, an eccentric end section 98 of a retaining clip 99 facing the base body edge 78 has a plurality of likewise integrally formed on the retaining clip 99 and connected axially one behind the other. the molded receptacle opposite 100 on. In the assembled state, the receiving eyelets 97 and the receiving counter-100 are arranged interlocked. In the axial direction, one of the receiving eyelets 97 of the main body end segment 96 alternates with one of the receiving eyelets 100 of the eccentric end section 98.

The eyelets 97 each have an eyelet passage opening 101, the receiving eyelets 100 each have a counter eyelet passage opening 102. When assembled, the eyelet passage openings 101 and the eyelet passage openings 102 at least partially overlap. For mounting, an eccentric tensioning rod 103 in its non-exciting transverse position is inserted through the eyelet passage openings 101 and the counter-eyelet passage openings 102. By a corresponding rotational movement about its longitudinal axis, the eccentric tensioning rod 103 is brought into its exciting longitudinal position, whereby the circular comb main body 95 and the retaining clip 99 are moved toward one another or pulled toward one another, and the degree of overlap of the eyelet passage openings 101 and the counter-loop Through openings 102 is increased. In this case, the circular comb main body 95 is subjected to the tangential tensile force Fi (which in this embodiment is also very high). The circular comb basic body 95 thus also has tensile fastening means with the receiving eyelets 97, which are designed to act on the circular comb main body 95 in the state mounted on the shaft 5 with a tangential tensile force Fi. For the same purpose, corresponding tensile fastening counteracting means cooperating with these tension fastening means are present. The latter are, in particular, the eccentric end section 98 with the receiving counter 100 and the eccentric tension rod 103 which is rotatable about its longitudinal axis and is detachably inserted. To disassemble the circular comb 94 of the eccentric tension rod 103 is first rotated back into its non-exciting transverse position, whereby the tensile load in the circular comb main body 95 disappears. The eccentric tension rod 103 can then be easily pulled out of the eye through-holes 101 and the counter-eye through holes 102. After loosening and / or removing any other fastening means, the retaining clip 99 and then also the circular comb 94 can be removed.

In principle, other embodiments for the tangentially tensioned attachment of a circular comb or its circular comb main body to the shaft 5 are conceivable. In particular, combinations of the fastening variants explained above are possible.

FIG. 8 shows a further exemplary embodiment of a circular comb unit 104 of a combing machine with a circular comb 105 fixed tangentially braced on the shaft 5. Circular comb unit 104 has a similar construction to circular comb unit 57 according to FIG. 4. The essential difference consists in a washer 106 which is loosely disposed between inner circumferential surface 8 of segmented circular comb main body 59 and mounting surface 27 of holding body 67 for adapting the Pliers distance D is inserted. The washer 106, which is designed in particular as a metal sheet with a selectable plate thickness corresponding to the desired adaptation of the tong distance D, is a component of the circular comb 105. In the example shown, the washer 106 has a plate thickness of approximately 1 mm. The metal sheet is flexible and bendable, so that it adapts to the cylinder-segment-shaped contour of the (multi-part) mounting surface 27. The washer 106 extends at least over the entire combing area and thus over the tangential and axial area encompassed by all central basic body segments 60 of the circular comb main body 59. In the exemplary embodiment shown in FIG. 8, the washer 106 even extends beyond the tangential and axial areas covered by the main body end segments 61, 62. Due to the segmentation of the circular comb main body 59, the insertion of the washer 106 is readily and in particular without sacrificing the accuracy of the body segments 60-62 on its base - here the resting on the mounting surface 27 washer 106. The with the insertion the washer 106 associated enlargement of the outer diameter of the abutment surface for the base body segments 60-62 is balanced due to the tangential and in particular a radial play connection between adjacent the body segments 60-62. The base body segments 60-62 closely conform to the washer 106 when assembled.

The same also applies to the further embodiment shown in FIG. 9 of a circular comb unit 107 of a combing machine with a circular comb 108 fixed tangentially to the shaft 5. Here, in order to adapt the tong distance D between the inner peripheral side 8 of the segmented circular comb main body 59 and the mounting surface 27 of the holding body 67 a plurality of tangentially successively arranged washers 109, 1 10 and 1 1 1 loosely inserted with different sheet thicknesses. The washer 109 has a sheet thickness of, for example, about 1 mm, the washer 1 10, for example, about 0.6 mm and the washer 1 1 1, for example, about 0.3 mm. By choosing different sheet thicknesses, the resulting tong distance D can be adjusted very accurately according to the desired specifications. It is possible to set a uniform pliers distance D in the entire combing area, but also to set a pliers distance D. changing in the combing area with a specific profile, especially in the tangential direction. The inserted washers 109-1 1 1 can completely replace the main body segments 60-62 ie, in particular on both inner contact strips 33, 34 (see, for example, the main body end segment 62 and the adjoining first central main body segment 60 and the fourth central body segment 60 seen in the direction of rotation DR of the shaft 5 and of the circular comb 108, respectively), or only in part, ie in particular only on one of the two inner contact strips 33, 34 (see, for example, seen in the direction of rotation DR second, third and fifth central body segment 60), capture. Under some of the basic body segments 60-62, none of the washers 109-1 1 1 can also be located (see, for example, the main body end segment 61). Due to the segmentation of the circular comb basic body 59, the individual body segments 60-62 can, as they nestle against their lower counterpart, be largely flexibly or individually adapted to the respective washer constellation. The washers 109-1 1 1 are here in turn to be understood as constituents of the circular comb 108.

According to a further embodiment, not shown, several washers may be stacked in the radial direction one above the other.

Instead of loosely inserted washers 106 and 109-1 1 1, another embodiment with attached to the inner peripheral side 8 shims is possible. A corresponding embodiment is shown in FIG. Shown is a basic body segment 1 12 of a segmented circular comb main body 1 13 with a lower part element 1 attached to the inner circumferential side 8. Apart from the latter, As a fastening means for fixing the Unterlegelements 1 14 on the base body segment 1 12 has the base body segment 1 12 inclined Anlageilächen 1 15 and 1 16, of the latter is formed by an inner wall of a on the inner peripheral side 8 of the main body segment 1 12 introduced mounting slot 1 17. The Unterlegelement 1 14 has upwardly projecting clamp lugs 1 18, 1 19, which abut in the assembled state of the Anlageilächen 1 15 and 1 16, so that the shim 1 12 is attached in particular like a clip on the base body segment 1 12. The attachment is designed in particular detachable. In principle, other embodiments for the releasable fixing of a shim on the inner peripheral side 8 of a base body segment are possible.

Claims

claims

1. circular comb for a comber for combing textile fibers and for attachment to a about a rotation axis (4) rotatable shaft (5) of the comber comprising

 a) a circular comb main body (6; 22; 42; 59; 77; 87; 95; 1 13) having an outer peripheral side (7),

 b) a plurality of combing bars (9) arranged on the outer circumferential side (7) of the circular comb main body (6; 22; 42; 59; 77; 87; 95; 1 13), which in their entirety cover a combing circumferential angle segment (KS) and define a combing area of the circular comb (2; 21; 41; 58; 76; 86; 94; 105; 108), wherein

 c) the circular comb main body (6; 22; 42; 59; 77; 87; 95; 1 13) has a plurality of parts and a plurality of tangentially directly interconnected main body segments (15-17; 23; 43-45; 60-62; 79; 91; 96; 1 12), wherein each combing bar (9) is associated with one of the basic body segments (15-17; 23; 43-45; 60-62; 79; 91; 96; 1 12), and each combing bar (9) is mounted on the base body segment (15-17; 23; 43-45; 60-62; 79; 91; 96; 1 12) associated therewith.

2. circular comb according to claim 1, characterized in that the

 Base segments (15-17; 23; 43-45; 60-62; 79; 91; 96; 1 12) are releasably connected together.

Circular comb according to claim 1 or 2, characterized in that the base body segments (15-17; 23; 43-45; 60-62; 79; 91; 96; 1 12) are positively connected with one another in the tangential direction. Circular comb according to one of the preceding claims, characterized in that at least some of the base body segments (15; 23; 60; 1 12) for tangential connection at a first tangential end with a connection extension (18; 24) and at a second tangential end wherein the connection extension (18; 24) and the connection opening (19; 25) correspond to one another and the connection extension (18; 24) has an undercut (20; 26) for tangential force transmission.

Circular comb according to one of the preceding claims, characterized in that the tangential connection between two adjacent body segments (15-17; 23; 43-45; 60-62; 79; 91; 96; 1 12) in the unmounted state, a relative movement of adjacent main body segments (15-17; 23; 43-45; 60-62; 79; 91; 96; 1 12) against each other in the radial direction by up to 0.3 mm, in particular by up to 0, 1 mm permits.

Circular comb according to one of the preceding claims, characterized in that all base body segments (60) on which a combing bar (9) is mounted, are designed identical.

Circular comb according to one of the preceding claims, characterized in that the circular comb main body (59) has at its two tangential ends in each case a kämmriegelfreies main body end segment (61, 62), with fastening means (63-66) for attachment of the circular comb main body (59) on the shaft (5) is equipped.

8. Circular comb according to one of claims 1 to 5, characterized in that the circular comb main body (6; 42; 77; 87; 95) at its two tangential ends in each case a basic body end segment (16, 17; 44, 45; 79 91; 96) on which a combing bar (9) is mounted and which is provided with fixing means (16a, 17a, 65, 66; 46, 47, 65, 66; 81; 92; 97) for securing the circular comb base body (9; 6; 42; 77; 87; 95) on the shaft (5).

9. Circular comb according to one of the preceding claims, characterized in that at least some of the base body segments (60- 62; 1 12) with spacing means (106; 109-1 1 1; 1 14) for distance-variable mounting in the radial direction on the shaft (5) are equipped.

10. circular comb according to claim 9, characterized in that the

Circular comb main body (59) has an inner peripheral side (8) and the spacer means as at least one on the inner peripheral side (8) fixedly mounted or loosely fitting washer (106, 109-1 1 1) are executed.

1 1. Circular comb according to claim 10, characterized in that at the

Inner peripheral side (8) lie tangentially and / or radially successively arranged washers (109-1 1 1).

12. Circular comb according to claim 1 1, characterized in that the

Washers (109-1 1 1) at least partially have a different slice thickness.

13. Circular comb according to one of the preceding claims, characterized in that the circular comb main body (1 13) an inner circumference Fangsseite (8) and at least some of the base body segments (1 12) on the inner peripheral side (8) with fastening means (1 15, 1 16, 1 17) for attaching a shim (1 14) are equipped.

14. Circular comb according to one of the preceding claims, characterized in that the base body segments (15-17; 23; 43-45; 60- 62; 79; 91; 96; 1 12) made of aluminum with a tensile strength of up to 310 N / mm ^{2 are} made.

15. Circular comb according to one of the preceding claims, characterized in that the circular comb main body (6; 42; 59; 77; 87; 95) with Zugbefestigungsmitteln (16a, 17a, 65, 66; 46, 47, 65, 66; 63 - 66; 81; 92; 97) for its attachment to the shaft (5) is equipped and these Zugbefestigungsmittel (16a, 17a, 65, 66; 46, 47, 65, 66; 63- 66; 81; 92; 97) are designed to the circular comb main body (6;

42; 59; 77; 87; 95) in the mounted on the shaft (5) state with a tangential tensile force (Fi) to apply.

16. Circular comb according to claim 15, characterized in that the circular comb main body (6; 42; 59) has an inner circumferential side (8) and the Zugbefestigungsmittel at least partially as at least one on the outer peripheral side (7) to the outside or on the inner peripheral side (8 In particular, two Zugbefestigungsvorsprünge (65, 66) are present, of which in each case one preferably at one of the two tangential ends of the circular comb base body (6; 42; 59) is arranged.