JP6847967B2 - Circular comb with combing bar and body - Google Patents

Description

The present invention relates to a circular comb of a combing machine (wool combing machine) for combing woven fibers, the circular comb being configured to be fixed to the shaft of the combing machine, the shaft being rotatable about a axis of rotation.

For example, combs that are configured as circular combs or round combs and are used in combing machines are known to be publicly available, and combing elements are circular combs that are combed in engagement with the fiber tufts of woven fibers. It is placed on the main body. A comb in which the combing element is provided at least along a part of its circumference is called a circular comb. Therefore, the active combing region can be, for example, 78 degrees, 90 degrees, 111 degrees or 137 degrees around the circumference of the contour of the circular comb. Combing elements can be configured, for example, as needles, needle bars, sawtooth wires, combing prongs or especially sawtooth cutouts. These plurality of combing elements are usually pre-assembled to form a combing bar, which are often also referred to as combing segments or comb fittings. Thus, this type of combing bar can include multiple sawtooth cutouts, sawtooth wires or toothed washers with teeth, which are located adjacent to each other in the axial direction, i.e. in the direction of the axis of rotation. Tooth.

In order to obtain good combing results, it is particularly desirable to achieve the minimum radial distance of the tooth tips of the combing needle or combing bar in relation to the nipper unit, which is part of the combing machine. Holds the fiber tuft and combs during combing.

In order to achieve this, the circular comb body is provided with a plurality of combing bars, and the circular comb body is fixed to the roller body or the holding body of the combing machine so that the height can be adjusted in the radial direction. Patent Document 1 (CH 683190 A5). )It is described in. The circular comb body is held by the set screw at a variable distance in the radial direction from the roller body or the holding body. Adjustable mounting causes concave bending of the circular comb, which can lead to variations in tooth tip position.

Patent Document 2 (DE 29720656 U1) and Patent Document 2 in another example of a circular comb having a mounting portion whose height can be adjusted in the radial direction of the circular comb body, in which a plurality of combing bars are provided on the shaft of the combing machine. It is known from 3 (EP 2789716 A1).

In the embodiment described in Patent Document 2, a spacer element configured as a washer is provided between the circular comb body and the shaft. In the example described in Patent Document 3, the circular comb body has a recess on the inside facing the shaft, and a support element is arranged therein to support the circular comb body on the shaft. There is a replaceable spacer element between the base of the recess and the support element, which allows the radial position of the circular comb on the shaft to be set to some extent depending on its thickness.

Some of the known examples of accurate positioning of the tooth tips of a circular comb and close proximity to the nipper unit of the combing machine have elaborate designs, and some of them also have tooth tips within the combing area. The radial end positions of the are quite different from each other.

CH 683190 A5 DE 29720656 U1 EP 2789716 A1

An object of the present invention is to provide a circular comb of the above type whose properties are improved as compared to known conventional examples.

In order to achieve this object, a circular comb corresponding to the feature of claim 1 is provided. The circular comb according to the present invention includes a circular comb body on the outer peripheral side and a plurality of combing bars arranged on the outer peripheral side of the circular comb body, and the combing bar covers the combing circumferential open angle segment as a whole. The circular comb body has a multi-part design and has multiple body segments that are tangentially directly connected to each other, and each of the combing bars is of the body segment. Combined into one, each combing bar is specifically attached directly to the body segment associated with it.

Each combing bar, together with the body segment, forms a subunit in particular. Body segments, in particular tangential to each other, some of which particularly directly carry combing bars, can be particularly interpreted or referred to as fixed bars. In particular, there is a combing circumferential open angle segment in at least the same body segment as the combing bar, which includes a total of six combing bars arranged tangentially to each other, especially over a tangential open angle region of up to 150 degrees. In the embodiment, for example, over the tangential open angle region of about 137 degrees, in the embodiment including a total of five combing bars arranged tangentially to each other behind, for example, over the tangential open angle region of about 111 degrees, they are tangential to each other. In an embodiment with a total of four combing bars arranged in the direction, it extends over, for example, a tangential open angle region of about 90 degrees.

Body segments can be connected to each other, for example in the form of chain links. Further, there are direct tangential connections between the body segments adjacent in the tangential direction, i.e., advantageously, no other connecting means need to be provided between them.

The circular comb body has substantially the basic shape of the circumferential segment of the hollow cylinder in particular, and the cylindrical axis of the hollow cylinder is the longitudinal central axis of the circular comb body that particularly coincides with the rotation axis.

The position or orientation indication used herein refers specifically to the axis of rotation of the shaft or the cylindrical coordinate system defined by this axis of rotation. In this regard, the term "axis direction" refers to the orientation in the direction of the rotation axis, the term "radial direction" refers to the orientation in the direction perpendicular to the rotation axis, and the term "tangential direction" refers to the orientation around the rotation axis. Point to.

It has been found that the tangentially segmented design of the circular body makes it much easier and more accurate to manufacture individual body segments compared to previously used prior art integrated circular comb bodies. It was. Locally detailed production inaccuracies, such as slight deviations or slight twists from a given radial dimension in the integrated circular comb body, feature a combing bar with the circular comb body within the combing machine. This can adversely affect the positioning accuracy of the tooth tips when mounted virtually anywhere within the combing area, not just the location of production inaccuracies. In the worst case, this adverse effect can even be greater at a location farther from the defect than the actual defect due to the leverage effect. Therefore, considerable effort must be made to achieve very high manufacturing accuracy in known integrated circular comb bodies. Nevertheless, the above-mentioned adverse effect on the positioning accuracy of the tooth tip cannot be completely avoided by the conventional integrated circular comb body.

In contrast, the body segment of a circular comb according to the invention can be manufactured much more easily with the precision required due to its small size. In addition, the segmented design prevents locally limited inaccuracies from affecting tooth tip positioning accuracy across the combing area. The error propagation is stopped at the segment boundary.

Moreover, due to its small size, the body segment of the circular comb according to the invention can be mounted on the shaft much more easily and with higher accuracy than the larger integrated circular comb body of the prior art. The lower contact surface of the circular comb abuts the corresponding counter section in the mounted state, which is, for example, a shaft mount (circular) provided directly on the shaft (ie, direct mounting of the circular comb) or placed between them. It is provided on the comb (indirect mounting of the comb) and is preferably divided into segments. The smaller partial contact surfaces of the lower contact surface of the circular comb according to the invention, which are divided into segments, are each to the corresponding counter section above with greater accuracy than the larger integrated contact surface of the prior art integrated circular comb body. Can be mounted or mounted. Each of the body segments is closely fitted to the shaft or shaft mount on its lower partial contact surface, whereby the tooth tips of the respective combing bars are placed at the desired radial position (= combing radius). Guarantee that.

In addition, the contact forces acting on the lower partial contact surfaces of the individual body segments are substantially equal in the mounted state of the circular comb. As a result, the internal stress generated in the molded portion of the body segment, and thus the entire body, is minimized so that the body segment aligns with the counter contact surface in a form that fits snugly on the shaft or shaft mount. Becomes possible.

As a result, due to the segmented design, the circular combs according to the invention can be mounted directly or indirectly on the shaft of the combing machine, for which the tip of the combing bar has an accurate radius, especially everywhere. It is arranged at a position, and particularly preferably has a radial distance from the nipper unit of the combing machine.

The tangential connection of the body segments is advantageous because it can prevent unwanted tangential gaps or spacing between adjacent combing bars in the final assembled state. Therefore, the combing effect remains as intended. In particular, unwanted fluctuations or even interruptions in the combing effect at segment boundaries are prevented.

In particular, the combing bar and body segment can be pre-assembled to advantage before installing the circular comb on the combing machine. The combing bar mounted on the body segment and each body segment now form a pre-assembled subunit of a circular comb, in particular. This pre-assembly facilitates the final assembly of the circular comb at the site of the combing machine.

In addition, the split design of the circular comb body reduces the space required for storing and transporting the circular comb, allowing the main body segments to be closely stacked in a non-mounted state, thus enabling small packaging. Therefore, the circular combs according to the present invention also provide a reduced transport effort.

In addition, the subunit consisting of a body segment and a single combing bar, especially due to its small structural volume, is more than a conventional circular comb body and an overall circular comb consisting of all combing bars placed on it. It is much easier to assemble (partially). The (partially) assembled subunits are then assembled in the field to form the entire circular comb according to the invention when installed within the combing machine. This advantageous subassembly is only possible due to the segmented design of the circular comb body.

In addition, the segmented design of the circular comb body facilitates only a single combing bar of the circular comb according to the invention installed on the combing machine, without the need for special tools or special removal devices. Can be exchanged for. This has never been possible. This exchange could only be performed by removing the entire circular comb, including all combing bars. The circular comb according to the present invention is configured so that only specific subunits can be removed together with their respective combing bars and replaced with new subunits. The new subunit can be installed, for example, to repair a defective or worn comb bar on the replaced subunit. Alternatively, a subunit with combing bars with different combing characteristics could be installed to adapt the mating and combing behavior of the entire circular comb to the new operating conditions of the combing machine.

Circular combs according to the invention have many advantages over prior art circular combs that have an integral circular comb body with a segmented circular comb body.

The circular comb according to the present invention can be easily attached later to an existing combing machine together with the segmented circular comb body, and the user can enjoy the advantages of the circular comb according to the present invention described above even in the old combing machine. it can.

An advantageous embodiment of the circular comb according to the present invention will be apparent from the features of the claims that are subordinate to claim 1.

In an advantageous embodiment, the body segments are detachably connected to each other. This facilitates assembly and increases the degree of freedom of use.

According to another advantageous embodiment, the body segments are securely connected to each other, especially at least tangentially. This ensures good transmission of force in this direction as a whole within the circular comb body between the body segments.

According to another advantageous embodiment, at least some of the body segments are provided with a connecting projection at the first tangential end and a connecting opening at the second tangential end to allow tangential connection and connect. The protrusions and connecting openings correspond to each other, and the connecting protrusions have an undercut that allows the transmission of tangential force. The connecting projections with undercuts can be configured as webs with a dovetail or circular axial cross section, especially at the tangential web ends, which are preferably formed integrally with their respective body segments. It is a component. This geometry ensures good transmission of this tangential force as a whole within the circular comb body between the body segments.

According to another advantageous embodiment, the tangential connection between two adjacent body segments in the unmounted state allows the relative movement of the adjacent body segments to each other up to 0.3 mm in radius, especially 0.1 mm. Allow up to. When mounting a circular comb on a combing machine, this radial play of the tangential connection between two adjacent body segments is the individual positioning of each body segment on the counter contact surface of the shaft or shaft mount. Therefore, it allows a certain degree of freedom. In particular, the radial position can be slightly changed from one body segment to the next. Therefore, it is advantageous that the body segment is securely fitted to the counter contact surface of the shaft or shaft mount, which has a favorable effect on the radial position of the tooth tips of the combing bar.

According to another advantageous embodiment, all body segments to which the combing bar is mounted are designed to be the same, resulting in reduced manufacturing costs. The body segment requires only one single mold. In the first place, the main body segment has the greatest influence on the radial position of the tooth tip of the combing bar, and therefore the combing radius, and therefore the mold cost should be reduced and manufactured with high precision.

According to another advantageous embodiment, the circular comb body has a body end segment without a combing bar at each of its two tangential ends, the body end segment providing fixing means. Fix the circular comb body to the shaft. When manufacturing the two body end segments needed to mount the body for the first time, there is no need to pay particular attention to the accuracy of the radial dimensions and the shape accuracy of the partial contact surface below it, of the circular comb. It is arranged so as to abut the shaft or the shaft mount in the final assembled state. This lowers manufacturing costs.

According to another advantageous embodiment, the circular comb body has body end segments at each of the two tangential ends to which the combing bar is mounted, and comprises fixing means for fixing the body to the shaft. In this embodiment, the circular comb body can be designed to have a particularly lightweight and advantageous low mass inertia.

According to another advantageous embodiment, at least some of the body segments are provided with spacers that are mounted on the shaft at variable distances in the radial direction. It is not absolutely necessary to install this type of spacer on a circular comb according to the invention to obtain the desired combing radius in the final assembled state, but the situation occurs during installation or assembly, where in particular. Additional measures that are configured as the spacers described above and allow for radial height adjustments are nevertheless useful. This type of situation is to refurbish an existing combing machine, for example, especially in terms of improving combing quality. To achieve this, it is useful to reduce the distance between the tooth tips of the combing machine and the nipper unit, which can be done with spacers.

According to another advantageous embodiment, the circular comb body has an inner peripheral side portion and the spacer is fixed but as at least one washer mounted or abutted on the inner peripheral side portion in a particularly removable manner. It is composed. The washer is a particularly thin, preferably foldable sheet plate. In a possible alternative embodiment, the washer has a tangential extension, which at most is equal to the extension of the body segment with which it abuts. On the other hand, in another preferred alternative embodiment, the washer has a larger tangential extension of each of the body segments. The washer may extend over two or more body segments in particular, but in extreme cases may extend over all body segments. Radial height adjustment with washers works particularly well with circular combs according to the invention, especially with circular combs having an integrated circular comb body. Again, this is due to the segmented design. Normally, the outer diameter of the counter contact surface of the shaft or the shaft mounting body and the inner diameter of the lower contact surface of the circular comb body coincide with each other. The shaft or shaft mount is often a cylindrical segment, at least in the form of a substantially hollow cylindrical cylindrical segment. The outer diameter and the inner diameter often have the same or at least substantially the same size. If washers are placed between the counter contact surface and the lower contact surface for height adjustment, the cylindrical shapes that are configured to contact each other will not fit perfectly. When the washer is combined with a circular comb as in this example, the inner diameter of the inner peripheral side of the circular comb is reduced, and the circular comb with the integrated circular comb body does not come into close contact with the entire counter contact surface. .. In the worst case, there are only two narrow contact areas at the two tangential ends of the circular comb. Between these two contact areas, the integrated circular comb body is not in contact with it. On the other hand, in the circular comb according to the present invention including the segmented circular comb body, the poor contact behavior caused by inserting the washer is avoided. Due to their fairly short extensions in the tangential direction, the individual body segments make virtually complete surface contact with the counter contact surface. This is the case when washers are placed in between. In addition, the segmented design of the circular comb body allows the radial distance of the tooth tips of each combing bar from the nipper unit to be adjusted individually for all combing bars, in this case the desired washer. Thick washers are placed only under each body segment. As mentioned above, adjusting the distance of a particular combing bar is not possible with an integrated circular comb body.

According to another advantageous embodiment, a plurality of washers arranged tangentially and / or radially with respect to each other are provided so as to abut on the inner peripheral side portion. In addition, it is possible that at least some washers have different washer thicknesses. In particular, the individual body segments may be provided with different washers. Preferably, it is also conceivable to place the washer only below one of the tangential ends of the body segment. Each body segment then makes oblique contact with a curved counter contact surface or shaft or shaft mounting surface. In this way, the distance from the nipper unit to the tooth tip (= nipper distance) can be flexibly adjusted, preferably even if it is uneven in the tangential direction (= combing direction). The nipper distance can be configured to increase or decrease the shape of the wedge or to increase the shape of the wedge first and then decrease the shape of the wedge.

According to another advantageous embodiment, the circular comb body has an inner peripheral side portion, and at least some of the main body segments are provided with fixing means for fixing the washer element particularly detachably to the inner peripheral side portion thereof. .. This is another measure that allows the nipper distance to be adjusted individually, especially for individual combing bars. Further, fixing the washer element prevents the washer element from being lost during storage or transportation and / or repositioning during assembly. The latter will result in undesired basic situations and possibly at least locally different nipper distances than originally intended. The fixing means can be configured as a clip in particular. However, other configurations are conceivable as well.

According to another advantageous embodiment, the body segment is made of aluminium, in particular having a tensile strength of up to ^{310 N / mm 2.} Since the body segment has smaller dimensions than the conventional integrated circular comb body, the extrusion mold used in the manufacture is also smaller. Therefore, it is particularly advantageous to use materials with higher tensile strengths up to the above values. Materials with particularly high tensile strength can be used to produce particularly small and / or lightweight body segments without the risk of affecting their mechanical properties. The body segment is particularly extruded and is preferably configured as an extruded profile. The accuracy of the extrusion method, i.e. the dimensional accuracy, is particularly good, so it is placed in a position that is critical to the distance, in other words from the shaft of the combing machine and / or on the body segment from the nipper unit. There is no need to rework the position, which defines the radial distance of the combing bar. Therefore, the body segment, preferably configured as an extruded aluminum element, is ready to be installed and does not require additional rework.

According to another advantageous embodiment, the circular comb body comprises tensile fixing means that allow it to be fixed to the shaft, and these tensile fixing means exert a tangential tensile force when fixed to the shaft. It is configured to be added to the body. When a tensile force or load is applied to the circular comb and fixed to the shaft, the circular comb is particularly precise, especially substantial, that meets the design specifications for all tooth tips of the combing bar over the entire combing area. It can be mounted so as to secure an accurate radial position. Applies to circular comb bodies when fixed directly or indirectly to the shaft. The tangential tensile force is extremely important to ensure that the circular comb body presses against the shaft or the counter contact surface of the shaft mount. This counter contact surface can also be referred to as a mounting surface. The more accurate and uniform the comb structure seen as the base, and the more accurate the position of the tip of the tooth that protrudes most distally in the radial direction, the more the combing bar holds the combed textile fibers. It is positioned closer to the nipper unit of the machine and better combing results can be achieved. This is advantageous, even if one of the processing steps or its diameter has a slight tolerance or inaccuracy of only ± 2% and the body segment is still slightly twisted or warped. Does not adversely affect the radial position of the combing bar's tooth tips in its final assembled state. Such twisting or warping as well as diameter tolerances can be compensated for by the tensile forces applied to the circular comb body, and thus the individual body segments. Due to the tangential connection between the body segments, the tangential tensile or tensile load applied to the circular comb body acts evenly on all body segments, with the above-mentioned advantageous effects of all single bodies. It will be the form achieved for the segment. Therefore, the cost required for manufacturing the main body segment can be reduced. Certain production errors can even be compensated for later by applying tangential tension when mounting the circular comb. Therefore, the main body segment can be manufactured at low cost.

According to another advantageous embodiment, the circular comb body has an inner peripheral side portion, and the tensile fixing means has at least one tensile fixing protrusion protruding inward on the inner peripheral side portion, that is, in the direction of the axis of rotation (particularly). At least partially configured to be arranged (radially) or with at least one tensile fixing projection protruding outward (particularly radially) on the outer peripheral side, the latter. Is particularly provided with an undercut, in particular two tensile fixing projections, one of which is preferably located on one of the two tangential ends of the circular comb body. This type of tensile fixing protrusion allows a tensile load to be applied to the circular comb body in a simple form. Preferably, the tensile fixing projections can have contact surfaces arranged at an open angle with respect to the radial direction, so that the applied tensile load also has a tangential component and a radial inwardly oriented directional component.

According to another advantageous embodiment, the fixing means is at least partially configured as at least one fixed contact surface and a surface orthogonal to the fixed contact surface, particularly as a conical surface, preferably as an inner peripheral surface of a conical hole. It is constructed and is inclined or inclined with respect to the rotation axis in the radial direction and with respect to the rotation axis in the tangential direction. In particular, the plane orthogonal to the fixed contact surface forms one opening angle in each of the radial and tangential directions, and the opening angle is greater than 0 degrees and less than 90 degrees, preferably at least 15 degrees and up to 75 degrees. is there. This type of slanted fixed contact surface allows a tensile load to be applied to the circular comb body in a simple form.

In particular, at least some of the fixing means can also be configured as radial through holes in the circular comb body in at least one of its two tangential end regions, with at least some of the through holes on the outer peripheral side. It is configured as a conical seat that extends conically toward it and has a cross-sectional area that accepts the conical screw head of the tensile fixing screw, so that when the tensile fixing screw is mounted, the tangential tensile force is advantageously a circular comb body. Is added again to. Each through hole has a longitudinal axis of the through hole that extends substantially in the radial direction.

According to another advantageous embodiment, at least some of the fixing means are configured as body screw holes into which the tension fixing screws can be screwed, the body screw holes being at least one of the two tangential ends of the circular comb body. It extends from the radial interface, especially into the circular comb body in the shape of a blind hole. This type of body screw hole applies a tensile load to the circular comb body in a simple form.

According to another advantageous embodiment, at least some of the fixing means are configured as at least one receiving lug formed at one of the two tangential ends of the circular comb body, the receiving lug being axially rotating. It has an extending protrusion through hole and a rotatable eccentric clamping rod can be removably inserted into the protrusion through hole. This type of receiving lug can be attached to the circular comb body at low cost. By being composed of elements of an eccentric mechanism, tensile force can be applied to the circular comb body in a simple form.

According to another advantageous embodiment, two outer contact strips extend in the direction of the axis of rotation and are provided on the outer peripheral sides of each of the body segments where the combing bars are combined tangentially apart from each other with respect to the axis of rotation. , The outer contact strip forms a converging bar contact surface with which each combing bar abuts. Further, the inner contact strips extend in the direction of the rotation axis, project radially inward with respect to the rotation axis, and are provided tangentially apart from each other with respect to the rotation axis on the inner peripheral side of each of these body segments. The contact strips form the sole shaft mounting contact surface of each body segment and directly or indirectly contact or connect to the shaft. At least some of the outer contact strips are combined with each one of the inner contact strips to form a pair of strips with them. In addition, each outer and inner contact strip of the pair of strips overlaps at least partially in their tangential extension, and at least two pairs of strips are provided for each body segment to which the combing bar is combined. ing. Circumferential combs can be worn to ensure particularly accurate radial position, which means that the combing bar's entire combing area if these paired contact surfaces are located opposite each other in the radial direction. Contact surfaces with tangential positions and / or positional regions that substantially meet the design requirements of all tooth tips and at least partially match each other are provided on both the inner and outer circumference sides of the body segment. ing. Retains worsted woven fibers, at least in more accurate, uniform and positionally accurate positions of these tooth tips with maximum radial extensions compared to prior art circular comb designs The minimum distance of the combing bar from the nipper unit can be reduced, resulting in improved combing results.

The combing bar is in direct contact with the contact surface formed by the outer contact strips, especially on the outer peripheral side of the body segment. Therefore, these contact surfaces are also referred to as combing bar contact surfaces.

On the inner peripheral side, a contact surface is formed by an inner contact strip that projects particularly in the direction of the axis of rotation. Therefore, the inner contact strip is specifically configured as an inwardly projecting protrusion. At least in the combing area, these inner contact strips are the only and / or particularly single contact surfaces on the inner peripheral side of the circular comb body for mounting the body segment to the shaft. The circular comb body can be in direct contact with or indirectly connected to the shaft using these shaft mounting contact surfaces. These are done by at least one additional mounting element disposed between them, such as a shaft mount, particularly a retaining flange or retainer. Except for the shaft mounting contact surface, there is no further contact between the circular comb body on the one hand and the shaft or additional mounting elements on the other, at least in the combing area. Therefore, the tangential gap between two adjacent inner contact strips is not particularly in contact.

The outer and inner contact strips of the pair of strips are preferably arranged radially opposite to each other. The outer contact strip particularly has at least one outer contact strip partial region, the tangential position and extension thereof coincides with the tangential position and extension of at least one inner contact strip partial region of the inner contact strip. The outer contact strips of the pair of strips and these tangentially overlapping partial regions of the inner contact strips are arranged radially opposite to each other.

Each body segment to which the combing bar is combined is provided with at least 2 pairs of strips of this type, particularly 2 to 10 pairs, preferably 2 to 5 pairs. These body segments have at least two partial regions, especially in the radial direction, with a continuous (non-breaking) component connection between the inner and outer peripheral sides. These partial regions of each body segment and the combing bar combined with it are contiguous, especially in the radial direction, with the component connections, with outer and inner contact strips and inner contact strips on the inner and outer circumferences. Extends to the contact surface formed by. These contact surfaces are oriented in the direction of the shaft. Therefore, the radial connection spacing from the shaft is formed very accurately for each combing bar at at least two positions tangentially separated from each other. This connection interval is initially determined by the radial distance between the contact surfaces, especially on the outer and inner contact strips. Therefore, the connection spacing can be set early during the manufacture of the body segment when manufacturing the outer and inner contact strips. If the provisional body segment still has slight mechanical twists or warpages that occur during one of the manufacturing processes or has slight tolerances or inaccuracies in or to their diameter, eg, up to ± 2%. However, this does not adversely affect the radial position of the tip of the combing bar in the final assembled state of the circular comb. Such twisting or warping can be compensated for for the sole local or single contact of the mounting surface by the internal contact strips, such as diameter tolerances. This advantageous compensation for twisting or warping and / or compensation for diameter tolerances is especially achieved in the form of exposure to appropriate, preferably tangential tension, when the body segment of the circular comb body is mounted indirectly or directly on the shaft. Will be done. As a result, the cost required to manufacture the main body segment can also be reduced. When installing a circular comb, some production inaccuracies may later be compensated. Therefore, the main body segment can be manufactured at low cost.

Since the outer and inner contact strips are attached to the same component, i.e. each body segment, appropriate measures are taken early during the manufacture of the body segment to make each outer contact strip and the pair of strips. It is possible to ensure that the tangential position / extension of the inner contact strips match. At this stage, the cost required to do this is very low, as opposed to the very high position accuracy that can be achieved. In contrast, if the outer and inner contact strips combined with each other are placed in different components, the costs required will be much higher, although this is generally possible. These tangential positions / extensions pose the problem that they cannot be matched to each other until later, for example, the body segment is mounted on the shaft.

In another advantageous embodiment, exactly two pairs of strips are provided for each body segment to which the combing bar is combined. This ensures mounting and support that is mechanically formed on the shaft for each combing bar. Moreover, this type of body segment can be manufactured at a particularly low cost, because only two dimensions need to comply with high precision requirements.

According to another advantageous embodiment, two pairs of strips configured as multiple pairs of edge strips are provided for each body segment to which the combing bars are combined, and for each of the multiple pairs of edge strips, respectively. The tangential distance edge from the tangential segment edge of the body segment of is particularly smaller than the tangential distance between the two pairs of edge strips. As a result, each combing bar is mechanically mounted and supported on the shaft in a particularly stable manner. Further, the pair of edge strips may be placed exactly on the tangential edge of the bar in each case, in other words they may be directly adjacent to the tangential edge of the bar.

According to another advantageous embodiment, at least one outer contact strip and inner contact strip of the pair of strips are located in the same tangential position in each case and have the same tangential extension. In the case of these preferred pairs of strips, the outer and inner contact strips and the contact surfaces formed on the outer and inner circumferences of the respective body segments are exactly opposite to each other in the radial direction. As a result, the combing bar combined with this body segment is particularly efficiently mounted and supported on the shaft. There is no partial contact surface area without a counter on the opposite circumferential surface.

According to another advantageous embodiment, the protrusion of the inner contact strip has a radial protrusion height of 0.25 mm to 5 mm, particularly 0.5 mm to 2 mm, as measured perpendicular to the axis of rotation. On the one hand, this height is sufficient to compensate for possible mechanical twists or warpage or diameter tolerances of each body segment to be compensated for during assembly, for example by applying a suitable tensile load. However, on the other hand, this is not enough to cause mechanical instability.

According to another advantageous embodiment, the protrusions of the inner contact strip have a radial protrusion height of 0.25 mm to 35 mm, particularly 0.5 mm to 25 mm, as measured perpendicular to the axis of rotation. In this configuration, the mounted body segment is in direct contact with the shaft in particular, preferably having a relatively large radial extension, especially due to the radial distance of the tooth tip from the axis of rotation. Meet the specified specifications. Therefore, the protrusion height can be larger than, for example, 10 mm, and in particular can be a larger value up to tens of mm.

Further, the present invention also relates specifically to a circular comb unit for a combing machine for combing textile fibers, which circular comb unit is fixed to a shaft rotatable around a rotation axis and a shaft according to the invention described above. It is one of the advantageous embodiments of the circular comb according to the present invention described above. In order to secure the circular comb according to the present invention or one of its advantageous embodiments to the shaft, the circular comb unit has at least one mounting surface with which the inner peripheral side portion of the circular comb body abuts. They are arranged concentrically with respect to the axis of rotation.

The mounting surface is a smooth surface (that is, does not have a surface structure), which is particularly in the shape of a cylindrical segment, and is not particularly provided with protrusions or recesses. It may be part of a particular shaft, or in particular part of a fixing mechanism that is at least partially located between the shaft and the circular comb body. Therefore, the circular comb body may be particularly indirectly or directly fixed to the shaft. Further, it is advantageous that the cylindrical segment-shaped mounting surface has high concentricity and / or rotational symmetry with respect to the rotation axis. In particular, the mounting surface complies with DIN ISO 286-1: 1990-11 or its follow-up version EN ISO 286-1: 2010-11 and conforms to standard tolerance grade IT7.

According to another embodiment, the mounting surface may be a surface having a surface structure, which surface has a basic cylindrical segment shape specifically provided with additional protrusions and / or recesses.

The circular comb unit according to the invention has substantially the same advantages as previously described for the circular comb according to the invention and this advantageous embodiment.

Other features, advantages and details of the present invention will become apparent with reference to the drawings from the following description for some embodiments.

FIG. 1 shows an axial front end plan view of an embodiment of a circular comb unit with a circular comb fixed to the shaft by tangential clamping of the combing machine. FIG. 2 shows a sectional plan view of the front end portion in the axial direction of an alternative embodiment of the circular comb together with the segmented circular comb body. FIG. 3 shows a plan view of the axial front end of another embodiment of the circular comb of the circular comb unit of the combing machine, the circular comb being configured to be secured to the shaft by tangential clamping. FIG. 4 shows an axial front end plan view of another embodiment of a circular comb unit of a combing machine with a circular comb including a segmented circular comb body, the circular comb being secured to the shaft by tangential clamping. There is. FIG. 5 shows an axial front end cross-sectional plan view of an embodiment of another fixing mechanism including a tension screw fixing block provided for fixing a circular comb to the shaft by tangential clamping. FIG. 6 is an axial front end cross-sectional plane of an embodiment of another fixing mechanism comprising mounting a conical head screw provided to secure a circular comb to the shaft by tangential clamping. FIG. 7 shows a cross-sectional plan view of the front end portion in the axial direction of an embodiment of another fixing mechanism provided with an eccentric mechanism provided for fixing the circular comb to the shaft by tangential clamping. FIG. 8 shows an axial front end plan view of another embodiment of a circular comb unit with a circular comb in which the circular comb is secured to the shaft by tangential clamping of the combing machine, where the circular comb is a segmented circular comb. Equipped with a main body and washer. FIG. 9 shows a plan view of the axial front end of another embodiment of the combing machine with a circular comb fixed to the shaft by tangential clamping, the circular comb comprising a segmented circular comb body and a plurality of washers. .. FIG. 10 shows an axial front end plan view of an alternative embodiment of a body segment of a circular comb body segmented with a washer element to be mounted.

Hereinafter, examples of the present invention will be described with reference to the drawings. Corresponding components are numbered the same throughout FIGS. 1 to 4. The details of the examples described in more detail in the following paragraphs represent the invention by itself or are part of the subject matter of the invention.

FIG. 1 shows a first embodiment of a circular comb unit 1 of a combing machine for combing woven fibers. The circular comb unit 1 includes a circular comb 2, a fixing mechanism 3, and a shaft 5 that is rotatable around a rotation axis 4. The rotation axis 4 is specifically interpreted as the longitudinal center axis of the circular comb unit. A cylindrical coordinate system is defined in relation to the rotation axis 4, which is the axis direction z oriented along the rotation axis 4, the direction r oriented in the distance direction with respect to the axis 4, and the rotation axis. It has a tangential direction φ extending in the circumferential direction around 4. The circular comb 2 is fixed to the rotating shaft 5 by the fixing mechanism 3. The circular comb 2 includes a circular comb body 6 having an outer peripheral side portion 7 and an inner peripheral side portion 8 and a plurality of combing bars 9, and a total of five combing bars 9 are provided on the outer peripheral side in the illustrated embodiment. Arranged in section 7, the combing bar 9 includes combing teeth 10 that are intended to engage the fiber tufts of the woven fibers in a combed form. The combing bar 9 can be configured differently. In particular, the combing teeth 10 of the combing bar 9 may have different shapes and distances, and may be provided in different numbers.

The tooth tip 11 of the combing tooth 10 has a distance called the combing radius KR from the rotation axis 4. Further, the tooth tip 11 is separated from the lower end edge of the upper nipper 12 by the nipper distance D. Together with the lower nippers 13, the upper nippers 12 form the nipper unit 14 of the combing machine. The nipper unit 14 is used to hold the fiber tufts (not shown) of the woven fabric fibers to be worsted. The more accurate and uniform the nipper distance D over the combing area of the circular comb 2, the smaller the possible distance between the tooth tip 11 and the lower end of the upper nipper 12, which is improved and more consistently achievable. Combing results are obtained. The combing region of the circular comb 2 is formed by the entire combing bar 9, that is, the combing bar 9 as a whole. The entire combing bar 9 covers the combing circumference opening angle segment KS forming the active combing region, and the combing circumference opening angle segment KS can be, for example, a value of 78 degrees, 90 degrees, 111 degrees or 137 degrees, 75. Other values in the range of degrees to 150 degrees are also possible. In the illustrated embodiment, five combing bars 9 are included and the combing circumference opening angle segment KS covers an opening angle range of about 111 degrees. The nipper distance D is particularly in the range of 0.15 mm to 0.9 mm. The circular comb unit 1 and the circular comb 2 combined with the circular comb unit 1 shown in FIG. 1 have at least particularly accurate, uniform and positionally accurate combing radii of these tooth tips 11 of all combing bars 9 having the maximum distance from the rotation axis 4. Distinguished by KR, the circular comb unit 1 and the tooth tips 11 of the other circular comb units described below can be advantageously placed at positions closer to the nipper unit 14 by 0.2 mm than in conventional circular comb units. .. In particular, the nipper distance D is preferably 0.2 mm to 0.3 mm over the entire combing region. Therefore, a very low tolerance value of only about 0.1 mm was advantageously achieved over the entire combing region, which was previously not possible with conventional circular comb units.

To achieve this, the circular comb 2, especially the circular comb body 6, is designed in a special manner. The circular comb body 6 is divided into segments and is composed of a plurality of components configured as body segments 15, 16 and 17. In the illustrated embodiment, the circular comb body 6 has a total of five body segments connected to each other in the tangential direction, that is, three central body segments 15 of the same design and two body ends arranged at the tangential ends. The segments 16 and 17 are provided, and the main body end segments 16 and 17 are provided with tensile fixing protrusions 16a and 17a formed integrally with the segments 16, 17 respectively. Each one of the combing bars 9 is fixed to each of the main body segments 15 to 17. The direct tangential connection between the two body segments 15-17 adjacent to each other is configured as a tangential removable secure connection in each case. Therefore, the main body segments 15 and 16 have a connection protrusion 18 formed integrally with one of their tangential ends, and the main body segments 15 and 17 have a connection opening 19 corresponding to the connection protrusion 18 and are connected. The opening 19 expands inward and is integrally formed with the other end in the tangential direction. A secure connection in the tangential direction is obtained by the undercut 20 of the connecting projection 18, which is configured as a web having an axial cross section that is dovetailed at the web end in the tangential direction, where the undercut 20 is the respective connection opening 19 Engage in the extended part of. In order to form a secure connection in the tangential direction with the adjacent body segment 15 or 17, one connection projection 18 of the body segments 15 and 16 is provided with an undercut to provide an expanded connection opening 19 of the respective body segment 15 or 17. It is inserted in the axial direction. As a result, a connection between body segments 15 to 17, particularly configured in the form of a chain link, is obtained. In the radial direction, the tangential connection between the two adjacent body segments 15-17 in each case has radial play, eg, up to about 0.2 mm. As a result, the relative play value in the radial direction can be moved between adjacent objects of the main body segments 15 to 17 in the non-mounted state of the circular comb 2.

The segmented design of the circular comb body 6 ensures that the circular comb 2 is attached to the shaft 5 with great precision and radial accuracy, with the aim of achieving maximum combing quality, especially with the tip 11 The nipper distance D between the nipper unit 14 and the nipper unit 14 is set very accurately according to the design specifications, for example, a uniform nipper distance D and / or a very small nipper distance D over the entire combing area.

FIG. 2 shows a cross-sectional view of another embodiment of a circular comb 21 having a segmented circular comb body 22. The figure shows only the central body segment 23 of the circular comb body 22 to which the combing bar 9 is mounted. In contrast to the segmented circular comb body 6 shown in FIG. 1, the body segment 23 of the circular comb body 22 is provided with a connecting projection 24 having a slightly different design and a corresponding connection opening 25. .. The connecting protrusion 24 is also provided with an undercut 26, and the connecting opening 25 is widened inward so that the two adjacent main body segments 23, which are the same as the main body segment of the circular comb main body 6, are adjacent to each other. A secure connection in the tangential direction of the circular comb body 22 between them is guaranteed. However, the connecting projection 24 formed at one tangential end of the body segment 23 has a web shape with a circular axial cross section at the tangential web end.

The body segment 23 of the circular comb body 22 has, in particular, a plurality of single contact surfaces towards the combing bar 9 combined with it and towards the mounting surface 27 of the fixing mechanism 3, which implementation of this. In the example, it is multi-part designed in the axial direction.

Each body segment 23 has, in particular, two outer contact strips 28 and 29 on its outer peripheral side portion 7, which extend in the axial direction z and are separated from each other in the tangential direction φ. .. Between the two outer contact strips 28, 29, there is a fixed lug 31 that projects radially along with the recess 30. The outer contact strips 28, 29 form a combing bar contact surface with which the respective combing bars 9 abut. The fixed lug 31 surrounds the corresponding bar holding projection 32 of the combing bar 9.

On the opposite inner peripheral side portions 8, the main body segment 23 is provided with contact strips, that is, inner contact strips 33 and 34. These extend in the axial direction in the direction of the rotation axis 4, project inward in the radial direction, that is, particularly toward the rotation axis 4, and are tangentially separated from each other by the recess 35. The inner contact strips 33, 34 are formed by protrusions on the inner peripheral side portion 8. They are the mounting surface 27 of the fixing mechanism 3 as well as the contact surface of the only body portion 23 provided to be fixed to the shaft 5. Therefore, the inner contact strips 33, 34 are shaft mounting contact surfaces.

Since the fixation mechanism 3 is located in an intermediate position (see also FIG. 1), the inner contact strips 33, 34 are used to form an indirect connection to the shaft 5. In another embodiment, if the fixing mechanism 3 is not provided at all or is provided with a different fixing mechanism, the inner contact strips 33, 34 may be in direct contact with the shaft 5 and may be directly connected to the shaft 5. .. In these alternative embodiments, the peripheral surface of the shaft 5 is the mounting surface and the inner peripheral side portion 8 of the circular comb body is in contact with it.

In the mounted state, a hollow or intermediate space is formed between the inner contact strips 33, 34 by recesses 35 that separate the inner contact strips 33, 34 from each other. This intermediate space does not touch. In this region of the intermediate space, there is no contact between the circular comb body 22 and the mounting surface 27 facing the circular comb body 22.

Each of the two outer contact strips 28, 29 is combined with one of each of the two inner contact strips 33, 34. The outer contact strip 38 and its associated inner contact strip 33 and the outer contact strip 29 and its associated inner contact strip 34 form a pair of strips 36 and 37, respectively. The outer contact strips 28 and the inner contact strips 33 of the pair of strips 36 are arranged opposite to each other. They overlap at least the mating portion at each tangential extension. The same applies to the second pair of outer contact strips 29 and inner contact strips 34 of strip 37. In particular, the circular comb body 22 faces the combing bar 9 between the contact surfaces provided on the outer peripheral side portion 7 and the inner peripheral side portion 8 or toward the mounting surface 27 in each of the strips 36 and 37 pairs of regions. Has a continuous component connection or bridge in the radial direction r. The radial distances d1 and d2 between these outer and inner contact surfaces of the circular comb body 22 can be set and manufactured extremely accurately. This also applies when the circular comb body 22 is anodized and configured as an extruded aluminum shape with a tensile strength of up to ^{310 N / mm 2, as in the illustrated embodiment.} .. Therefore, the segmented circular comb body 22 shown is a component that can be manufactured at low cost, but the strips 36, 37 pairs of outer contact strips 28, 29 and inner contact strips 33 are arranged opposite to each other. , 34 guarantees very accurate radial distances d1, d2. In the illustrated examples, the distances d1 and d2 have values between 5 mm and 10 mm, particularly between 6 mm and 8 mm, preferably about 7 mm, respectively.

The two pairs of strips 36, 37 are configured as a pair of closely arranged edge strips of tangential bar edges 38 or 39, respectively. The tangential distance φ1 from the bar edge 38 to the pair of strips 36 and the tangential distance φ2 from the bar edge 39 to the pair of strips 37 are smaller than the tangential distance φ3 between the two pairs of strips 36, 37 in each case.

As described in the embodiment of the segmented circular comb body 22 and the components abutting the segmented circular comb body 21, in other words the circular comb 21 according to FIG. 2, the contact position between the combing bar 9 and the multipart mounting surface 27 is shown in FIG. The circular comb unit 1 or the circular comb 2 is configured in the same or the same manner.

The same applies to the additional embodiment shown in FIG. 3 of a circular comb unit 40 of a combing machine comprising a circular comb 41 configured to be secured to the shaft 5 by tangential clamping, said circular. The comb 41 also includes a segmented circular comb body 42. The circular comb body 42 has six body segments 43, 44, 45, each with a combing bar 9, the four central body segments 43 are of the same design, and the two tangential body end segments 44, 45 are them. It is provided with a tensile fixing projection 46 or 47 formed integrally with the. The circular comb 41 including the six combing bars 9 is configured such that the combing circumference opening angle segment KS covers an opening angle range of about 137 degrees.

Adjacent pieces of body segments 43-45 are securely directly connected to each other in the tangential direction. This secure connection, which is removable, is provided by hook-shaped connection protrusions 48, 49, which are provided with a particularly undercut formed at the tangential end of the body segments 43-45 and adjacent body segments 43-45. The connecting protrusions 48 and 49 of 45 are engaged with each other. As mentioned above for the segmented circular comb body 6, radial play between adjacent body segments 43-45 is also present at these secure connections.

Further, the circular comb 41 substitutes and fixes the six combing bars 9 to the main body segments 43 to 45. In the recess 30 between the two outer contact strips 28 and 29 of the plurality of pairs of strips 36, 37 provided to contact adjacent components in this embodiment, the combing bars 9 are oriented tangentially opposite to each other. There are lug holding surfaces 52, 53 that incline with two protruding fixed lugs 50, 51 that abut the corresponding inclined bar holding surfaces 54, 55, so that the combing bar 9 has a body segment 43, 44 or 45, respectively. It is guaranteed to be securely fixed to. The two fixed lugs 50, 51 form a dovetail fixed shape with inclined lug holding surfaces 52, 53 oriented in opposition to them.

In addition to the inner contact strips 33, 34 of the plurality of pairs of strips 36, 37, the body segments 43-45 add one in each case, especially in the area of the fixed lugs 50, 51 protruding from the outer peripheral side surface 7. Has an inner contact strip 56. These additional inner contact strips 56 are optional. They have additional support functions.

FIG. 4 shows another embodiment 57 of the combing machine with a circular comb 58 fixed to the shaft 5 by tangential clamping, the circular comb 58 also comprising a segmented circular comb body 59. The circular comb body 59 has five central body 60s of the same design with a combing bar 9 and two body end segments 61, 62 at its two tangential ends, which comprises the combing bar 9. Each has a tensile fixing projection 63 or 64, which is not provided and is formed integrally with the tensile fixing projection 63 or 64. Adjacent pieces of the main body segments 60 to 62 are directly and securely connected to each other in the tangential direction, and a similar dovetail fixed shape is provided like the segmented circular comb main body 6 according to FIG. ..

The circular combs 2, 21, 41 and 58, in particular the segmented circular comb bodies 6, 2, 42 and 59 provided in each case, make the tooth tips 11 very uniform, i.e. substantially uniform comb radii. It has a KR and is very accurate.

Some possibilities for fixing the circular combs 2, 21, 41, 58 to the shaft by tangential clamping are described below with reference to FIGS. 1, 4 and 5-7.

Circular comb bodies 6, 22, 42, 59, thus fixing the entire circular combs 2, 21, 41, 58 to the shaft 5 and applying tangential tension F1 to the circular comb bodies 6, 22, 42, 59. Tension fixing means are provided on the circular comb bodies 6, 22, 42, and 59. The tension fixing means is configured as tension fixing protrusions 65 and 66 provided on the outer peripheral side portion 7 so as to project outward. The tensile fixing protrusions 65 and 66 are the tensile mounting elements 16a and 17a (FIG. 1) and 46 of the main body side end segments 16 and 17 (FIG. 1), 44 and 45 (FIG. 3) and 61 and 62 (FIG. 4). They are arranged on 47 (FIG. 3), 63, and 64 (FIG. 4), respectively, and are particularly integrally formed with them.

Further, the fixing mechanism 3 is provided to fix the shaft and apply tension. The fixing mechanism 3 includes a plurality of components, and all of these components are not shown in the drawings. In particular, the fixing mechanism 3 has a plurality of holding bodies 67 configured as holding plates arranged in the axial direction of each other, and its narrow side portion has the shape of a cylindrical segment. These narrow sides of all retainers 67 together form the multipart mounting surface 27, and the circular comb bodies 6, 22, 42 and 59 are as described above, i.e. in particular their inner contact strips 33, It is in contact with 34. In the illustrated embodiment, the plate-like retainer 67 is configured as an injection molded or die-cast aluminum component, resulting in lighter weight. The cylindrical segmented narrow side of the retainer 67 forming the mounting surface 27 is manufactured precisely and dimensionally accurately.

Further, the fixing mechanism 3 includes two holding brackets 68 and 70. Both holding brackets 68, 69 are configured in the shape of hooks at their upper ends, and bracket lugs 70 or 71 are formed to engage the respective tensile fixing projections 65 or 66, respectively. Optionally, the bracket lugs 70 or 71 can engage undercuts that may be provided on the tensile fixing projections 65 or 66, respectively. Tension-fixing projections 65-66 may optionally include tilted engagement counter surfaces, with the combined bracket lugs 70 or 71 correspondingly tilted engagement counter surfaces, engagement surfaces and engaging engagements that abut against each other. It has a counter surface. The positions of the holding bracket screws 68 and 69 can be changed by the bracket screws 72 and 73. The exact position, mounting and number of bracket screws 72 and 73, which are the components of the fixing mechanism 3, will vary depending on the application and type of combing machine.

Another component of the fixing mechanism 3 is a counterweight 74 specifically provided on the shaft 5. The counterweight is fixed to the shaft 5 by clamping and / or screw coupling. In another embodiment (not shown), the counterweight may be configured not to form part of the fixing mechanism 3, but may be provided independently of it.

As already mentioned, the positions of the holding brackets 68, 69, especially the bracket lugs 70, 71, add a particularly desired tangential tension F1 to each one of the circular comb bodies 6, 22, 42, 59. Can be changed as The forces applied by the bracket screws 72, 73 to the tensile fixing projections 65, 66 by the bracket lugs 70, 71, respectively, can be preferably continuously adjusted and set to comply with the requirements. When doing so, an adjustable tangential tensile force F1 is added to each one of the circular comb bodies 6, 22, 42 and 59 having its body segments 15-17, 23, 43-45 and 60-62, respectively. Be done. In this form, the tangential tensile force F1 acting on each of the circular comb bodies 6, 22, 42, 59 is countered by the counter holding force F2 oriented in the opposite direction, which has the same absolute value. , Added by mounting holding brackets 68, 69 (not shown). On the one hand, the holding brackets 68, 69 and the tangential tension F1 applied by them ensure that one of the circular comb bodies 6, 22, 42 and 59 is secured to the shaft 5. On the other hand, the tangential tension F1 obtained in connection with the segmented design of the circular comb bodies 6, 22, 42 and 59 is such that each of the body segments 15, 17, 23, 43-45 and 60-62 Only at the positions of the respective body segments 15-17, 23, 43-45 or 60-62 will they be brought into close contact with the mounting surface 27 in individual form so as to be specifically executed. Small deviations between adjacent ones of body segments 15-17, 23, 43-45, 60-62 are tangents between adjacent ones of body segments 15-17, 23, 43-45 and 60-62, respectively. Compensated by radial play of directional secure connections.

Further, the tangential tensile forces F1 acting on each of the body segments 15-17, 23, 43-45 and 60-62 due to their respective circumferential positions and tangential connections are those of the circular comb bodies 6, 22, 42 and 59. Each one can be (slightly) extended in the tangential direction φ, with the annular comb-type main body attachment in each of the body segments 15-17, 23, 43-45 and 60-62. Preferably additionally, the body segments 15-17, 23, especially due to compensation for slight warpage or twist or diameter tolerances generated in the manufacturing process of the body segments 15-17, 23, 43-45 or 60-62. , 43-45 and 60-62 and the mounting surface 27 promote close contact. This compensation is preferably due to inner contact strips 33, 34 arranged on the inner peripheral side portion 8 of the embodiment shown in FIGS. 1 to 4, with body segments 15-17, 23, 43-45 or 60-62. It is particularly effective when the mounting surfaces 27 are not in complete face-to-face contact, but only in single contact with them.

Further, a component connecting portion or a bridge that passes through each of the main body segments 15 to 17, 23, 43 to 45, and 60 and faces the contact surface provided on the outer peripheral side portion 7 in the radial direction r comes into contact with the respective combing bars 9. Therefore, it is provided exactly in the area of the inner contact strips 33, 34 that abut the mounting surface 27, in other words, in the area of the plurality of pairs of strips 36, 37. This allows the (radial) positions of each comb bar 9 and thus all tooth tips 11 to be formed accurately even when exposed to particularly high tensile loads.

These advantageous means described above (ie, in particular, the segmented design of the circular comb bodies 6, 22, 42 and 59, preferably the application of tangential tensile forces, the mounting of the circular comb bodies 6, 22, 42 and 59. A single contact surface with the surface 27, and between the contact surfaces on the outer peripheral side portion 7 and the inner peripheral side portion 8, pass through each of the main body segments 15 to 17, 23, 43 to 45, and 60 in the radial direction. The two component bridges) ensure that the tooth tips 11 have very high position accuracy after actual mounting, i.e. after mounting them on the shaft 5, to comply with theoretical specifications as specified in the design document. It plays an important role in doing so.

With respect to close contact between each one of the circular comb bodies 6, 22, 42, 59 and the mounting surface 27, the tensile load or tension F1 is advantageous for each one of the circular comb bodies 6, 22, 42, 59 in the inner diameter direction. It provides an inwardly acting contact force that pulls the fixing lugs 31, 50, 51 inward, respectively, and presses against the corresponding bar holding projections 32 or the corresponding bar holding surfaces 54, 55 of the respective coining bars 9. Will be. The forces applied by the fixing lugs 31 and 50, 51 to the bar holding projections 32 and the bar holding surfaces 54, 55, respectively, are preferably large enough to provide the reinforcing bar 9 to one of each of the circular comb bodies 6, 22, 42, 59. Ensure that other separate fixing means such as fixing strips and / or screws to be fixed can be omitted. This provides mounting and cost advantages. This aspect also represents a distinct invention in its own right.

Other embodiments allow the corresponding tangential tensile load to be applied to the circular comb body, which is illustrated in FIGS. 5-7.

FIG. 5 shows a cross-sectional view of the circular comb unit 75, which includes the circular comb 76 along with the segmented circular comb body 77. This figure shows only one tangential end region of the circular comb 76, which is provided with tensile fixing means for fixing the segmented circular comb body 77 to the shaft by tangential clamping. ing. These tensile fixing means have a different design than the tensile fixing means of the circular combs 2, 21, 41 and 58.

The tension bearing 80 is arranged at the tangential body edge 78 shown in FIG. 5 of the circular comb body 77 or the body end segment 79 thereof. At least one main body screw hole 81 is provided, which extends in the form of a blind hole from the radial interface of the tangential main body edge 78 into the constituent material of the main body end segment 79. The at least one main body screw hole 81 is a means for pulling and fixing the circular comb main body 77. In this embodiment, the corresponding tension fixing counter means of the fixing mechanism 3a is configured as at least one tension fixing screw 84 inserted into the tension screw fixing block 82 and the passage hole 83 provided in the tension screw fixing block 82. .. The tension screw fixing block 82 extends radially outward from the mounting surface 27 of the holder 67 outside the combing region. It is attached to the retainer 67 in a suitable form.

The circular comb main body 77 can be exposed to a desired tangential tensile load or tensile force F1 by slightly screwing the tensile fixing screw 84 into the main body screw hole 81.

FIG. 6 shows a cross-sectional view of another circular comb unit 85, which includes the circular comb 86 along with the segmented circular comb body 87. Again, this figure shows only the area surrounding one tangential end of the circular comb 86, which is provided with tensile fixing means for fixing the circular comb body 87 to the shaft 5 by tangential clamping. ..

Here, a plurality of fixing mechanisms 3b provided for fixing the circular comb body 87 to the shaft 5 are arranged so as to overlap each other in the axial direction so as to allow the tensile fixing screws 89 to be screwed. Each of the tensile fixing screws 89 has a conical head 90, with a retainer 67 having an axial thickness sufficient to accommodate the screw holes 88.

In the body end segment 91 of the circular comb body 87, a through hole 92 is provided in the region of the body edge 78 in the tangential direction, which expands in a conical shape toward the outer peripheral side portion 7 and is conical at least in this outer region. It has the form of a locus. In any case, the circular comb body 87 is partially fixed to the mounting surface 27 of the holder 67 by a tensile fixing screw 89 screwed into the screw hole 88 in the final state of being inserted into the passage hole 92 and assembled.

In an alternative (partial) fixation not shown in FIG. 6, where the circular comb body 87 is fixed to the retainer 67 at, for example, another tangential end of the circular comb body 87, the tensile fixing screw 89 is not screwed in. , The axis of the screw hole 88 does not match the axis of each of the passage holes 92 combined with it, but rather has a small tangential deviation. The axis of each screw hole 88 is arranged at a tangential distance slightly larger than the combing region of the axis of the passage hole 92 corresponding to the screw hole 88. In the fully mounted state, the tensile fixing screw 89 is screwed in and this tangential offset no longer exists. Due to the slight tangential elongation of the circular comb body 87 caused by the tensile force, the axis of the screw hole 88 substantially coincides with the axis of each of the passage holes 92 combined with it.

In the final assembled state, the conical head 90 of the tensile fixing screw 89 is placed in the conical portion of the passage hole 92. When the tensile fixing screw 89 is screwed into the screw hole 88, the position of the conical head 90 of the tensile fixing screw 89 in the conical pedestal of the passage hole 92 becomes deeper, and the tangential tensile load or tensile force applied to the circular comb main body 87. F1 becomes large, and the former is extended in the tangential direction as described above.

In other words, the inner peripheral surface of the conical region of the passage hole 92 forms a fixed contact surface extending at an opening angle with respect to the radial direction r and the tangential direction φ, respectively. Therefore, the outer peripheral surface of the conical head 90 of the tension fixing screw 89 is a fixed counter contact surface extending at an opening angle with respect to the radial direction r and the tangential direction φ. Therefore, these surfaces act as tensile fixing means and tensile fixing counter means, and apply a tangential tensile force F1 to the circular comb body 87.

FIG. 7 shows a cross-sectional view of another circular comb unit 93, which includes the circular comb 94 along with the segmented circular comb body 95. Again, this figure shows only the area around one tangential end of the circular comb 94 to secure the circular comb body 95 to the shaft 5 by tangential clamping.

An eccentric mechanism is provided on the tangential body edge 78 of the circular comb body 95 to fix the former by applying a tensile force. The eccentric mechanism is a part of the fixing mechanism 3c. The plurality of receiving lugs 97 are arranged axially with each other on the main body edge 78 of the circular comb main body 95 or the main body end segment 96 thereof in a form integrally molded with them. Therefore, the eccentric end 98 of the holding bracket 99 facing the main body edge 78 in the assembled state is arranged on the holding bracket 99 in the axial direction with each other in the form of being integrally formed, and has a plurality of receiving counter lugs 100. In the mounted state, the receiving lug 97 and the receiving counter lug 100 are arranged so as to mesh with each other. The receiving lug 97 of the main body end segment 96 and the receiving counter lug 100 of the eccentric end 98 are alternately arranged in the axial direction.

Each of the receiving lugs 97 has a lug through opening 101, while each of the receiving counter lugs 100 has a counter lug through opening 102. In the mounted state, the lug penetrating opening 101 and the counter lug penetrating opening 102 overlap at least partially. During assembly, the eccentric clamping rod 103 passes through the lug penetrating opening 101 and the counter lug penetrating opening 102 at its lateral position where it does not exert a clamping action. The eccentric clamping rod 103 is moved to its vertical position to impart clamping action by rotating around its longitudinal axis, allowing the circular comb body 95 and the holding bracket 99 to move or pull towards each other, thus. The degree of overlap of the lug penetration opening 101 and the counter lug penetration opening 102 increases. When doing so, the circular comb body 95 is exposed to tangential tension F1, which is actually very high in this embodiment. Therefore, the receiving lug 97 of the circular comb body 95 also functions as a tensile fixing means, and is configured to apply a tangential tensile force F1 to the circular comb body 95 when mounted on the shaft 5. Corresponding tensile fixing counter means that interact with the tensile fixing means are provided to achieve the same purpose. The tension-fixing counter means is particularly configured as an eccentric end 98 composed of a receiving counter lug 100 and an eccentric clamping rod 103, and is removable and rotatably inserted around its longitudinal axis.

To remove the circular comb 94, the eccentric clamping rod 103 is initially rotated back to a lateral position that does not exert a clamping action, so that the circular comb body 95 is no longer exposed to tensile loads. The eccentric clamping rod 103 can then be easily removed from the lug penetration opening 101 and the counter lug penetration opening 102. After loosening and / or removing all other fixing means, the holding bracket 99 and the circular comb 94 can be moved again.

Other embodiments of fixing the circular comb or the circular comb body to the shaft 5 by tangential clamping are also generally considered. In particular, it is possible to provide a combination of the fixed alternatives described above.

FIG. 8 shows another embodiment illustrating the circular comb unit 104 of the combing machine with the circular comb 105 fixed to the shaft 5 by tangential clamping. The circular comb unit 104 has a design similar to that of the circular comb unit 57 according to FIG. The essential difference is that the washer 106 is provided, which is loosely inserted between the inner peripheral side 8 of the segmented circular comb body 59 and the mounting surface 27 of the retainer 67 and the nipper distance. Adjust D. The washer 106 is configured as a sheet metal plate having a plate thickness that can be selected particularly according to the desired nipper distance D and is part of the circular comb 105. In the illustrated embodiment, the washer 106 has a plate thickness, in other words, a washer thickness of about 1 mm. The sheet metal plate is flexible and bendable, allowing it to fit the contours of the cylindrical segment shape of the (multipart) mounting surface 27. The washer 106 extends at least over the entire combing region, and thus over the tangential and axial regions covered by all central body segments 60 of the circular comb body 59. In the embodiment shown in FIG. 8, the washer 106 also extends over the tangential and axial regions covered by the body end segments 61, 62. Due to the segmented design of the circular comb body 59, the washer 106 can be easily inserted, especially between the body segments 60-62 and their bases, without compromising contact accuracy, which is the mounting surface in this embodiment. A washer that comes into contact with 27. For the body segments 60-62 caused by inserting the washer 106, the increase in the outer diameter of the contact surface is compensated by the connection between the adjacent ones of the body segments 60-62, which has tangential, especially radial play. .. In the mounted state, the main body segments 60 to 62 are closely fitted to the washer 106.

The same applies to the additional embodiment shown in FIG. 9 along with the circular comb 108 in which the circular comb unit 107 of the combing machine is fixed to the shaft 5 by tangential clamping. Here, in order to adjust the nipper distance D, the plurality of washers 109, 110, 111 having different plate thicknesses are tangential to each other between the inner peripheral side portion 8 of the segmented circular comb main body 59 and the mounting surface 27. It is loosely inserted in the form of being placed in. The washer 109 has a plate thickness of, for example, about 1 mm, the washer 110 has a plate thickness of, for example, about 0.6 mm, and the washer 111 has a plate thickness of, for example, about 0.3 mm. Choosing different plate thicknesses can result in the nipper distance D being very accurately adapted to the requirements.

It is possible to set a uniform nipper distance D over the entire combing area, and as an alternative, it is also possible to set a nipper distance D that has a specific contour in the combing area and that fluctuates in the tangential direction in particular. is there. The washers 109-111 inserted therein can cover the entire body segment 60-62, particularly both the inner contact strips 33, 34 (eg, viewed in the rotational direction DR of the shaft 5 or circular comb 108). See the body end segment 62 and its adjacent first central body segment 60 and fourth central body segment 60), or only partially, i.e. specifically one of the two inner contact strips 33, 34. (See, for example, the second, third, and fifth body segments 60 when viewed in rotational DR) can be covered. It is also possible not to provide any washers 109-111 under some of the body segments 60-62 (see, eg, body end segment 61). Due to the segmented design of the circular comb body 59, the individual body segments 60-62 can be very flexible and individually adapted to their respective washer arrangements when in contact with their underlying counter counterparts. it can. Here, the washers 109 to 111 are also a part of the circular comb 108 in this case as well.

According to another embodiment (not shown), a plurality of washers may be stacked up and down in the radial direction.

It is also conceivable that instead of the loosely inserted washers 106 and 109-111, a different configuration is a washer element fixed to the inner peripheral side portion 8. Corresponding embodiments are illustrated in FIG. This figure shows a washer element 114 provided on the inner circumferential side portion 8 together with the main body segment 112 of the segmented circular comb main body 113. Apart from the washer element 114, the circular comb body 113 essentially corresponds to the circular comb body 22 according to FIG. The main body segment 112 has inclined contact surfaces 115 and 116 that serve as fixing means for fixing the washer element 114, and the inclined contact surface 116 is a fixing slot 117 formed on the inner peripheral side portion 8 of the main body segment 12. Formed by the inner wall. The washer element 114 has an upwardly projecting bracket element 118, 119 that abuts the contact surfaces 115, 116 in the assembled state, whereby the washer element 114 is fixed to the body segment 112 in a particularly clipped form. The above fixing is particularly detachable. It is also generally conceivable to provide other configurations in which the washer element is detachably mounted on the inner peripheral side portion 8 of the body segment.

Claims (15)

A circular comb for a combing machine for combing woven fibers, the circular comb being mounted on a shaft (5) of the combing machine, the shaft being rotatable around a rotation axis (4).
a) A circular comb body (6, 22, 42, 59, 77, 87, 95, 113) and an outer peripheral side portion (7) are provided.
b) A combination of a plurality of combing bars (9) arranged on the outer peripheral side portion (7) of the circular comb body (6, 22, 42, 59, 77, 87, 95, 113) as a whole is a combing circle. Prepared to cover the circumferential open angle segment (KS) and form a combing region of circular combs (2, 21, 41, 58, 76, 86, 94, 105, 108).
c) The circular comb bodies (6, 22, 42, 59, 77, 87, 95, 113) have multiple body segments (15-17, 23, 43-45, 15-17, 23, 43-45, which are directly connected tangentially to each other in a multipart design. 60-62, 79, 91, 96, 112), each combing bar (9) of the body segment (15-17, 23, 43-45, 60-62, 79, 91, 96, 112) Each combed bar (9) is attached to the body segment (15-17, 23, 43-45, 60-62, 79, 91, 96, 112) to be combined into one.
d) The circular comb body (6, 42, 59, 77, 87, 95) is a tensile fixing means (16a, 17a, 65, 66, 46, 47, 65, which allows it to be fixed to the shaft (5). 66, 63-66, 81, 92, 97), and these tensile fixing means (16a, 17a, 65, 66, 46, 47, 65, 66, 63-66, 81, 92, 97) are shafts (16a, 63-66, 81, 92, 97). A circular comb characterized in that it is configured to apply a tangential tensile force (F1) to the circular comb body (6, 42, 59, 77, 87, 95) when fixed to 5). The circular comb according to claim 1, wherein the body segments (15-17, 23, 43-45, 60-62, 79, 91, 96, 112) are detachably connected to each other. Claim 1 or claim 2 is characterized in that the main body segments (15-17, 23, 43-45, 60-62, 79, 91, 96, 112) are securely connected to each other in the tangential direction. The circular comb described. To allow tangential connection, at least some of the body segments (15, 23, 60, 112) are at the connecting projections (18, 24) at the first tangential end and at the second tangential end. The connection openings (19, 25) are provided, the connection projections (18, 24) and the connection openings (19, 25) correspond to each other, and the connection projections (18, 24) are for tangential force transmission. The circular comb according to any one of claims 1 to 3, wherein the circular comb has an undercut (20, 26). In the non-mounted state, the tangential connections between two adjacent body segments (15-17, 23, 43-45, 60-62, 79, 91, 96, 112) are 0.3 mm radial to each other, especially Claims 1 to claim that allow relative movement of adjacent body segments (15-17, 23, 43-45, 60-62, 79, 91, 96, 112) up to 0.1 mm. Item 4. The circular comb according to any one of the items. The circular comb according to any one of claims 1 to 5, wherein all the main body segments (60) to which the combing bar (9) is mounted have the same design. The circular comb body (59) has its own body end segment (61, 62) at each of its two tangential ends, and the body end segment does not include a combing bar (9). The circular comb according to any one of claims 1 to 6, further comprising fixing means (63 to 66) for fixing the circular comb body (59) to the shaft (5). The circular comb body (6, 42, 77, 87, 95) is equipped with a combing bar (9) and is a fixing means (6, 42, 77, 87, 95) for fixing the circular comb body (6, 42, 77, 87, 95) to the shaft (5). Each body end segment (16, 17, 44, 45) at each of its tangential ends comprising 16a, 17a, 65, 66, 46, 47, 65, 66, 63-66, 81, 92, 97). , 79, 91, 96). The circular comb according to any one of claims 1 to 5. At least some of the body segments (60-62, 112) are provided with spacers (106, 109-111, 114) to allow them to be secured to the shaft (5) at a variable distance in the radial direction. The circular comb according to any one of claims 1 to 8. The circular comb body (59) has an inner peripheral side portion (8), and the spacer is securely mounted or loosely abutted on the inner peripheral side portion (8) at least one washer (106, 109-111). 9. The circular comb according to claim 9, wherein the circular comb is configured as. The circular comb according to claim 10, wherein a plurality of washers (109 to 111) arranged tangentially and / or radially with respect to each other are provided so as to abut on the inner peripheral side portion (8). The circular comb according to claim 11, wherein at least some of the washers (109 to 111) have different washer thicknesses. The circular comb body (113) has an inner peripheral side portion (8), and at least some of the main body segments (112) are provided with fixing means (115, 116, 117) on the inner peripheral side portion (8). The circular comb according to any one of claims 1 to 12, wherein the washer element (114) can be fixed. The body segments (15-17, 23, 43-45, 60-62, 79, 91, 96, 112) are made of aluminum, in particular having a tensile strength of up to ^{300 N / mm 2.} The circular comb according to any one of claims 1 to 13. The circular comb body (6, 42, 59) has an inner peripheral side portion (8), and at least some of the tensile fixing means are outward from the outer peripheral side portion (7) or from the inner peripheral side portion (8). It is configured as at least one tensile fixing protrusion (65, 66) projecting inward, and in particular, two tensile fixing protrusions (65, 66) are preferably one of each of the circular comb body (6, 42, 59). The circular comb according to any one of claims 1 to 14 , wherein the circular comb is provided so as to be arranged at one of the two tangential ends of the above.

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