EP3754055B1 - Circular comb for a combing machine - Google Patents

Description

The present invention relates to a circular comb for a combing machine and a combing head with such a circular comb.

Such round combs are used for combing machines for combing a submitted fiber mass (cotton, wool, etc.), whereby the fiber mass can be presented in the form of cotton webs wound on sleeves or in the form of individual fiber ribbons. The number of combs (combs / minute) have increased significantly in recent years, which also increases productivity.

The round combs used for the combing machine in practice consist of a round comb carrier which is provided with a clamping hub with which it is fastened in a rotationally fixed manner on a driven round comb shaft. A clothing carrier is attached to a partial circumference of the circular comb carrier, which takes up the combing clothing which combs out the end of the fiber mass (also called tuft) presented by a tong assembly. In an alternative embodiment, round comb supports are used which are held directly on a driven round comb shaft.

The requirements for such a circular comb have been increased, for. B. increased precision of the components is required in order to achieve a combing effect that is precisely tailored to the fiber material to be combed. These requirements make it necessary to improve the adjustment options of the circular comb within a combing head. In particular, a precise setting of a distance between the enveloping circle of the combing clothing and the circular comb axis contributes to improving the combing process. With such an adjustment, the distance between the lower tong plate of the tongs and the enveloping circle of the combing clothing of the circular comb can be adjusted in order to ensure optimal combing. Such adjustability through the use of an arcuate spacer element is z. B. in the DE 297 20 656 U1 shown and described. An exact adjustment option down to the smallest step sizes is, however, with such an arcuate one Element not possible. If, for example, to change the enveloping circle radius of the combing clothing of the round comb, that in the DE 297 20 656 U1 The arcuate spacer element shown is exchanged for another arcuate spacer element with a different thickness, the outer radius of the spacer element protruding in the direction of the carrier changes, while the inner radius of the carrier with which it rests on the spacer element remains constant. This can cause tension between the carrier and the spacer element.

Further reveals the EP 2 789 716 A1 a circular comb with a carrier which is provided with an inner section protruding towards the shaft, which has a recess which is open in the direction of the shaft and extends in the longitudinal direction of the hollow profile, in which a support element is received, which on the one hand extends over a first Support surface is supported on a base surface of the recess and on the other hand via a second support surface on the outer circumference of the shaft. Interchangeable spacer elements are provided between the support element and the base of the recess. This is intended to make it possible to set the radius of the enveloping circle of the combing clothing exactly by simply inserting precise spacer elements between the base body and the support element. However, it is disadvantageous that an adjustment of the distance between the lower tong plate of the tongs and the enveloping circle of the combing set of the round comb can only be changed step by step depending on the spacing elements present. In addition, the circular comb has to be removed from the combing device for a readjustment of the distance in order to be able to exchange the spacer elements.

Through the in the EP 3 467 166 A1 disclosed solution attempted to remedy the disadvantages of older designs. A height adjustment of the circular comb clothing through the use of wedge elements is proposed. The wedge elements are disclosed in various embodiments. In one embodiment, the wedge elements are inserted between the circular comb carrier and a comb segment carrier. The disadvantage here is that special comb segment carriers have to be made available which cannot be used on comb carriers without height adjustment. In a further embodiment, the wedge elements are between the comb carriers and introduced the round comb shaft. The disadvantage here is that the shape of the wedge elements must be adapted to the round comb shaft or vice versa in order to obtain a sufficient support. Furthermore, the wedge elements are to be provided guided in the axial direction of the round comb shaft in order to avoid tilting and thus blocking of the wedge elements or damage to the surface of the round comb shaft when the wedge elements are shifted for the purpose of height adjustment.

The object of the present invention is therefore to create a circular comb which enables the distance between the lower tong plate of the tongs and the enveloping circle of the combing clothing of the circular comb to be continuously adjusted, with easy retrofitting to existing combing machines without reworking or replacement of components of the machines existing clothing carrier is made possible.

The object is achieved by the devices with the features of the independent claim.

A circular comb for a combing machine is proposed, the circular comb having a combing clothing and a circular comb axis, with a clothing carrier and at least one circular comb carrier. The clothing carrier is held on the circular comb carrier and the circular comb carrier is attached to a circular comb shaft with connecting screws. A cover plate is attached to each end of the circular comb support viewed in the direction of the circular comb axis. An insert rail is provided between the circular comb support and the circular comb shaft. At least two adjusting devices are provided between the circular comb carrier and the insert rail for adjusting a distance between the circular comb shaft and the circular comb carrier.

Due to the connection of the lower pliers plate of the pliers with the round comb shaft, the distance between the lower pliers plate of the pliers and the outer circle of the combing assembly changes when the distance between the round comb carrier and the round comb shaft is adjusted.

The side of the insert rail facing away from the circular comb support comes into contact with the surface of the circular comb shaft and the circular comb support is connected through the insert rail to the circular comb shaft via appropriate connecting elements, for example screws or bolts. The adjustment device is arranged between the insert rail and the circular comb carrier, this has the advantage that the distance is adjusted within the circular comb and, on the one hand, the shape or nature of the surface of the circular comb shaft has no influence on the adjusting device and, on the other hand, the circular comb shaft is not damaged by the adjusting device can be. Furthermore, the support surface of the insert rail, which comes to rest on the surface of the circular comb shaft, can be matched to the circular comb shaft. With the correct design and material pairing, the stick-slip effect can be reduced or eliminated, which leads to greater adjustment precision. It also provides protection against excessive tightening and possible permanent deformations, which could reduce the service life and setting precision. It is advantageous if the entire length of the insert rail is not used for the installation, but rather a certain area around the fastening point of the circular comb support is designed as a separate support. With this construction, the proposed device can be easily adapted to the conditions in existing systems and the round combs can be exchanged easily.

The clothing carrier has a clothing support surface on its side facing away from the circular comb shaft. A comb clothing is attached to the clothing support surface using suitable means, for example with screws, clamps, welding or gluing. Combing clothing consisting of individual wire strips applied to the clothing support surface or also combing clothing consisting of prefabricated combing elements which are applied to the clothing support surface are used. The clothing support surface is arranged in the shape of a segment of a circle around the circular comb axis. The circular comb carrier and the clothing carrier are advantageously designed in one piece. The clothing support surface is formed by the outer surface of the circular comb support.

The at least two adjustment devices between the circular comb carrier and the insert rail are advantageously provided in a respective end region of the circular comb carrier. Because the adjustment devices are arranged at the outer ends of the circular comb, the adjustment devices can be easily adjusted from the side of the circular comb. A more stable support of the circular comb carrier on the adjustment devices is also possible if these are provided at a greater distance from one another.

The insert rail is advantageously connected in a force-locking manner through a through opening in the circular comb shaft with the circular comb shaft via a fastening screw. This construction ensures a simple connection between the round comb shaft and the insert rail. The insert rail is immovably connected to the round comb shaft. This connection does not have to be released when the adjustment device is readjusted, which contributes to an improvement in the adjustment accuracy.

The insert rail is preferably connected to the circular comb carrier via a shoulder screw, the shoulder of the shoulder screw engaging in a recess in the fitting carrier and a screw head of the shoulder screw engaging in a recess in the insert rail on a side of the insert rail opposite the fitting carrier and between the insert rail and the screw head a spring element is arranged on the shoulder screw. The actuation of the adjusting device is not hindered by the spring element. The advantage of the spring element is that when the distance between the insert rail and the clothing carrier changes, there is always a cohesive force between the clothing carrier and the insert rail. This has a particularly positive effect when the distance is reduced. In this case, the clothing carrier is drawn towards the insert rail by the spring element and the distance can be adjusted without play at any time. A wave spring which has a minimum restoring force of 70 N is particularly preferably used as the spring element.

By using a shoulder screw, this can on the one hand be screwed firmly into the clothing carrier with its shoulder and on the other hand results in an exact positioning of the clothing carrier on the insert rail. When changing the clothing carrier, no realignment in the direction of the circular comb axis is necessary. This is also because the position of the insert rail on the circular comb axis does not have to be changed for changing the clothing carrier.

In an alternative embodiment, the circular comb carrier is advantageously connected to the insert rail in a form-fitting manner by a force transmission element, the force transmission element being designed as a bolt with an internal thread that engages in a recess in the circular comb carrier and a through opening of the insert rail, and the bolt passes through a through opening in the circular comb shaft is positively connected to the round comb shaft via a screw. An end face of the bolt facing the circular comb shaft is spaced apart from a surface of the circular comb shaft by a shoulder which is pronounced on an outer surface of the bolt and is supported on the insert rail and by a corresponding length of the bolt section protruding into the insert rail. As a result, an end face of the bolt facing the circular comb shaft does not come into contact with a surface of the circular comb shaft. This construction enables the insert rail to be braced with the circular comb shaft, with the bolt section protruding into the circular comb carrier on the one hand enabling the circular comb carrier to be precisely positioned and, on the other hand, the transfer of the centrifugal forces, acceleration and braking forces acting on the circular comb carrier during operation during the combing process on one rotation , as well as the necessary transferable torques at the shaft coupling points on the round comb shaft. The insert rail is also connected to the circular comb shaft independently of the fastening of the circular comb carrier.

The use of an O-ring or advantageously two O-rings enables the bolts to be inserted into the circular comb support and the insert rail without play. In the power transmission, the O-rings act as damping elements, which in the case of the acceleration forces that occur, wear and tear due to a reversal of direction which counteracts the forces that occur and contributes to less wear and tear on the components. The fit between the bolt and the circular comb carrier is advantageously chosen so that the O-ring and the surfaces support one another for maximum service life and power transmission. Since the power transmission no longer has to be absorbed by the frictional connection between the circular comb support and the circular comb shaft, the support can be manufactured more easily. In the case of very high acceleration forces, a transition or press fit can be provided between the bolt and the circular comb support or the insert rail in an alternative embodiment. It is premature to use a different pair of materials, such as aluminum and bronze, in order to prevent contact corrosion or fusing.

Advantageously, the adjustment device comprises flat wedges arranged between the insert rail and the circular comb carrier, which, starting from the respective end of the clothing carrier, have a continuous cross-sectional tapering towards the insert rail or the circular comb carrier in the direction of the circular comb axis. Due to this cross-sectional tapering, the spacing between the insert rail and the circular comb is changed when the flat wedges are shifted in the direction of the circular comb axis. The design of the flat wedges is adapted to the shape of the circular comb support and the insert rail. Since the flat wedges have no contact with the round comb shaft or the clothing carrier, the flat wedges can be adapted exactly to the conditions in the round comb, regardless of these components that usually exist.

The respective connecting screws of the circular comb support preferably engage in the circular comb shaft through an opening provided in the respective flat wedge and a through opening provided in the insert rail. As a result, the connecting screws of the circular comb carrier can also be used to secure the adjustment device. Depending on the existing construction of the round comb shaft, the connecting screws can be screwed into an internal thread in the round comb shaft or an internal thread in the round comb support or in a threaded nut to brace the round comb support with the round comb shaft. Also prevents the Implementation of the connecting element through the opening of the flat wedge a lateral slipping out of the flat wedge during an adjustment.

After loosening the connecting screws for attaching the circular comb carrier to the circular comb shaft, the adjustment device enables the distance between the lower tong plate and the enveloping circle of the comb clothing on the clothing carrier to be easily adjusted without the circular comb having to be removed from the combing head when the setting is changed . A setting can thus also be checked directly in the installed state by measuring the distance between the lower tong plate and the enveloping circle of the comb clothing located on the clothing carrier. For this purpose, the circular comb can be rotated into a measuring position when installed, in which the distance can be set and measured. After the setting has been made, it is secured again by simply tightening the connecting screws to attach the circular comb support to the circular comb shaft. The device enables the height to be adjusted in the measuring position without having to pivot the comb for adjustment and fixation or even having to be removed from the machine for height adjustment.

Advantageously, a contact surface of the flat wedges facing the circular comb carrier is molded onto a contact surface provided on the insert rail. By adapting the shape of the insert rail and flat wedge at the point of their contact, a play-free contact of the flat wedge on the surface of the insert rail is achieved. In addition, there is the option of incorporating profiles, for example longitudinal grooves, of guided displacement of the flat wedges along the circular ridge axis.

The continuous cross-sectional tapering is preferably provided by a bevel of a support surface of the flat wedge facing the circular comb carrier, the bevel having a wedge angle α of 11 degrees or less. Choosing a wedge angle of less than 11 degrees ensures that the flat wedge is self-locking. The flat wedge thus remains in its position when the connecting screws of the circular comb support with the circular comb shaft are tightened. Furthermore, the angle of the flat wedge is chosen so that the static friction conditions of the system are not overcome by the screw force. the flat wedge preferably has a wedge angle of 10 degrees.

The support surface of the flat wedge facing the circular comb carrier is advantageously designed with a convex curvature. The slight curvature of the support surface results in a defined support (theoretical line) of the circular comb support on the flat wedge. Furthermore, an inclined position from left to right of the comb can be precisely adjusted through the curvature in order to adapt precisely to a possible inclined position of the tongs for the best combing performance. If different heights are set on the left and right, this results in a line overlay which, depending on the size of the angle, moves further away from an axis of the connecting screw. This leads to deformations and height errors when tightening the connecting screw. The curvature results in a defined central support surface independent of the left-right offset. The insert rail, which is molded onto the round comb shaft and is designed as a flat surface on the side facing away from the round comb shaft, results in a great advantage in production and thus in manufacturing costs from the insert rail and the wedge by dividing the curved surfaces into two Components.

The respective flat wedge is preferably provided with an adjusting screw held in the respective cover plate, the adjusting screw being arranged with its axis parallel to the circular comb axis. Because the adjusting screw is held in the cover plate, the circular comb support can be removed without losing the flat wedges. The flat wedges are removed from the combing head together with the cover plates that are connected to the circular comb carrier. Furthermore, due to the axially parallel arrangement of the adjusting screw, it is possible to adjust the flat wedges on the face side from outside the circular comb. It is not necessary to remove the circular comb or parts of it for adjustment.

Furthermore, the adjusting screw is preferably held rotatably in its axial position in the cover plate and an internal thread is provided in the flat wedge, whereby the position of the flat wedge relative to the circular comb carrier can be adjusted in the direction of the circular comb axis by engaging the adjusting screw in the internal thread in the flat wedge by turning the adjusting screw. Since the adjusting screw does not change its axial position due to the axial fixation even when turning, the thread of the adjusting screw, which is in engagement with the internal thread of the flat wedge, shifts the flat wedge axially according to the pitch of the internal thread in relation to the circular comb axis. In this case, neither the insert rail nor the flat wedge change their axial position, which has the consequence that the circular comb carrier and the insert rail are radially driven apart or brought together due to the displacement of the flat wedge. Due to the fact that the cover plate is attached to the circular comb carrier, the cover plate shifts in its position relative to the flat wedge and thus the adjusting screw. Because of this, a through opening in the form of an elongated hole or a correspondingly large bore is advantageously provided in the cover plate. For example, a locking ring, also known as a Seeger ring, can be used to axially fix the adjusting screw. Alternatively, a corresponding shape of the passage opening in the cover plate and the adjusting screw can also be provided in order to achieve an axial retention of the adjusting screw. The use of a locking ring is an easy to assemble and inexpensive construction to hold the adjusting screw in its axial position.

The opening in the flat wedge is advantageously designed as a bore, an elongated hole or a slot open towards a side facing away from the end of the clothing carrier. A design in the form of an open slot enables a simple exchange of a flat wedge without completely detaching the circular comb support from the insert rail. The design in the form of an open slot also prevents the flat wedge from slipping out to the side during an adjustment after the connecting screws have been loosened. Configuring the opening as a bore or elongated hole, on the other hand, has the advantage that the flat wedge has a larger, compact contact surface.

The distance between the insert rail and the circular comb support is advantageously 0 mm to 1.5 mm. It has been shown that the distance in this area can be adjusted by using flat wedges and is also sufficient for the necessary adjustment of the distance between the lower tong plate of the tongs and the enveloping circle of the combing clothing for the fiber material to be processed in a combing facility.

At least two adjusting devices are preferably provided in a respective end region of the circular comb carrier. The direction of rotation of the circular comb results in an inlet side with which the combing clothing first meets a tuft to be combed. Due to its rotation, the circular comb moves through the tuft until it leaves it again on the outlet side of the combing clothing. As a rule, the combing clothing with its enveloping circle is arranged concentrically to the circular comb shaft. However, it has been shown that advantageously, due to the flow conditions caused by the movement of the circular comb, the distance between the clothing carrier and the circular comb carrier on an inlet side of the combing clothing from the distance between the clothing carrier and the circular comb carrier on an outlet side of the combing clothing is around 0 , Differs from 1 mm to 1.5 mm. By arranging two adjustment devices in the respective end area of the circular comb, it is possible to set the distance on the inlet side and the outlet side differently, so that the combing processes can be optimally matched to the demands made by the fiber material to be combed.

A combing head is also proposed with a circular comb and a counterweight or compensating element, the circular comb having a clothing carrier with a clothing support surface and at least one circular comb carrier and the circular comb carrier with the counterweight or compensating element being mutually arranged on a circular comb shaft, the circular comb being designed as described above is.

It is advantageous here if the counterweight is held non-rotatably on the circular comb shaft with fastening elements, independently of the circular comb carrier. This makes it possible to replace the circular comb carrier without also having to remove the counterweight from the circular comb shaft. This is particularly advantageous when pre-assembled round combs that are adjusted to a specific combing process are used. Once set, kits which include the circular comb carrier, the clothing carrier, the adjustment devices and the comb clothing can be exchanged in a simple manner.

Figur 1

eine schematische Seitenansicht eines Kämmkopfes 1 einer Kämmmaschine nach dem Stand der Technik;

Figur 2

eine schematische Darstellung einer Ausführungsform eines erfindungsgemässen Rundkammes in einem Längsschnitt;

Figur 3

eine vergrösserte schematische Darstellung des Details Y nach der Figur 2;

Figur 4a

eine schematische Darstellung einer Verstelleinrichtung;

Figur 4b

eine schematische Darstellung eines Flachkeils in einer weiteren Ausführungsform;

Figur 5

eine schematische Darstellung einer ersten Ausführungsform des Rundkammes in einer Ansicht X nach der Figur 2;

Figur 6

eine schematische Darstellung einer zweiten Ausführungsform des Rundkammes in einer Ansicht X nach der Figur 2;

Figur 7

eine schematische Darstellung einer weiteren Ausführungsform eines erfindungsgemässen Rundkammes in einem Längsschnitt und

Figur 8

eine vergrösserte schematische Darstellung des Details Z nach der Figur 7.

Further advantages of the invention are described in the following exemplary embodiments. Show it:

Figure 1

a schematic side view of a combing head 1 of a combing machine according to the prior art;

Figure 2

a schematic representation of an embodiment of a circular comb according to the invention in a longitudinal section;

Figure 3

an enlarged schematic representation of the detail Y according to FIG Figure 2 ;

Figure 4a

a schematic representation of an adjustment device;

Figure 4b

a schematic representation of a flat wedge in a further embodiment;

Figure 5

a schematic representation of a first embodiment of the circular comb in a view X according to FIG Figure 2 ;

Figure 6

a schematic representation of a second embodiment of the circular comb in a view X according to FIG Figure 2 ;

Figure 7

a schematic representation of a further embodiment of a circular comb according to the invention in a longitudinal section and

Figure 8

an enlarged schematic representation of the detail Z according to FIG Figure 7 .

Figure 1 shows a schematic side view of a combing head 1 of a combing machine according to the prior art. In known combing machines, for. B. eight such combing heads 1 arranged side by side. The combing head 1, of which only a part of the elements is shown, has a nipper unit, which via the Pivot arms 3 and 4 about the tong shaft 5 and the round comb axis 6 is mounted pivotably back and forth in the frame of the comber. The tong shaft 5 is driven by a drive, not shown in detail, in order to give the tong assembly a back and forth movement. In the circular comb axis 6, the circular comb shaft 8 is arranged, on which a circular comb 7 is fastened in a rotationally fixed manner. The circular comb shaft 8 with its circular comb axis 6 is also driven continuously or discontinuously in the direction of rotation 23 by a drive (not shown). In the known solution shown, the circular comb 7 fastened below the nipper unit on the circular comb shaft 8 consists of two circular comb carriers 9 fixedly spaced from one another in the direction of the circular comb axis 6 and attached to the circular comb shaft 6, on the outer circumference of which a clothing carrier 10 on the one hand and a counterweight 11 is fastened on the other. The fastening of the counterweight 11 takes place, as shown schematically, by means of the screws 12, by means of which the counterweight 11 is fastened to the circular comb supports 9. The clothing carrier 10 is also firmly connected to the circular comb carriers 9 via connecting elements 24, which are shown schematically. Above the clothing carrier 10, which, like the counterweight 11, extends over the entire length L (see Figure 4 ) of the circular comb 7, a combing set 13 is attached. In known combing machines, the circumferential angle of the combing clothing 13 is 90 to 130 degrees and is also referred to as the "combing angle".

The tong assembly is formed from a tong frame 14 to which a lower tong plate 15 and an upper tong plate 16 are attached. In the embodiment shown, the tong assembly is closed, with the tuft 17 protruding from the clamping point of the tong assembly being grasped by the combing clothing 13 and combed out. The combing out is essentially determined by the distance C between the lower pincer plate 15 and an enveloping circle 2 of the combing clothing 13. Also in the tong frame 14, a feed roller 18 is rotatably mounted above the lower tong plate 15, which z. B. is driven stepwise by a ratchet drive, not shown. Via this feed roller 18, a wadding 19 (or individual slivers) fed to the combing device 1 is fed to the clamping point of the tong assembly. After the tuft 17 has been combed out, the tong assembly is pivoted in the direction of a subsequent pair of tear-off rollers 20. During this pivoting process, the tong assembly opens and the combed-out end of the wadding 19 or the tuft 17 is placed on the end of a previously formed fiber fleece 21 and, under the action of the clamping point of the tear-off rollers 20, is soldered to it and transported away in the conveying direction 22.

Figure 2 shows a schematic representation of an embodiment of a circular comb according to the invention in a longitudinal section. The circular comb is shown along a circular comb axis 6, the circular comb axis 6 at the same time being the longitudinal axis of the circular comb shaft 8 on which the circular comb is held non-rotatably by a circular comb carrier 9. The circular comb is shown by way of example in an embodiment in which the circular comb carrier 9 and a clothing carrier are shown in one piece, the circular comb carrier 9 having a clothing support surface 41 on a side facing away from the circular comb shaft 8. The combing clothing is held in the form of individual clothing wires or combing elements (not shown) on the clothing support surface 41.

In the embodiment shown, the circular comb carrier 9 is designed as a profile that extends over the entire length of the circular comb, with an insert rail 31 being provided between the circular comb carrier 9 and the circular comb shaft 8. The circular comb carrier 9 is braced with connecting screws 24 on the circular comb shaft 8 via an adjusting device and the insert rail 31. For this purpose, the insert rail 31 is provided with supports 32 which are integrally formed on the surface of the circular comb shaft 8 and which are provided at least in the area of the connecting screws 24. The adjustment device comprises a flat wedge 28, which is provided with an opening 30 for the passage of the connecting screws 24. The flat wedge 28 has an obliquely arranged support surface 42 for the contact of the circular comb carrier 9. For the non-rotatable mounting of the circular comb carrier 9 on the circular comb shaft 8, the connecting screws 24 are passed through the circular comb shaft 8. In the embodiment shown, however, a force transmission element 35 is provided for the transmission of the acceleration forces between the circular comb carrier 9 and the circular comb shaft 8, which is fastened to the circular comb shaft 8 with a clamping screw 36.

An adjusting device is inserted between the insert rail 31 and the circular comb carrier 9 in an end region 27 of the circular comb carrier 9. The adjusting device serves to set a distance A between the circular comb carrier 9 and the insert rail 31. A cover plate 25 is also fastened with screws 26 at the respective end of the circular comb carrier 9. The adjustment device comprises a flat wedge 28, which is inserted between the insert rail 31 and the circular comb carrier 9, and an adjusting screw 29 for moving the flat wedge 29 in the direction of the circular comb axis 6. A cover plate 25 is also attached to the respective end of the circular comb carrier 9 with screws 26. The cover plate 25 serves on the one hand as protection against contamination and on the other hand for the rotatable mounting of the adjusting screw 29. The adjusting screw 29 is held in the direction of the circular comb axis 6 in the cover plate 25, for example by a locking ring 44 (see Figure 4a ) which is fastened to the adjusting screw 29 on the side of the cover plate 25 opposite the screw head of the adjusting screw 29. The adjusting screw 29 engages in an internal thread in the flat wedge 28, whereby when the adjusting screw 29 is rotated, the flat wedge 28 is displaced in the direction of the circular comb axis 6 while the insert rail 31 and the circular comb carrier 9 are held in place. The spacing A of the insert rail 31 and the circular comb carrier 9 is changed, the extent of the change depending on the thread pitch of the adjusting screw 29 and a wedge angle a provided on the flat wedge 28.

On a side of the circular comb shaft 8 opposite the circular comb carrier 9, a compensating element 33 is fastened to the circular comb shaft 8 with fastening elements 34. The compensating element 33 serves to achieve an almost unbalance-free rotation of the circular comb shaft 8 in spite of a combing set on one side. Due to the separate attachment of the compensating element 33 to the circular comb shaft, the circular comb carrier 9 can be exchanged without having to remove the compensating element 33. The insert rail 31 and the force transmission element 35 can also remain on the circular comb shaft 8. As a result, a simple and exact positioning of the circular comb carrier 8 is given regardless of its attachment.

Figure 3 shows an enlarged schematic representation of the detail Y according to FIG Figure 2 with a force transmission element 35. The force transmission element 35 in the form of a cylindrical bolt 38 is provided with a shoulder 37 in the area between the circular comb support 9 and the insert rail 31. This shoulder 37 is pulled by the tensioning screw 36 against the insert rail 31, whereby the insert rail 31 is tensioned on the comb shaft 8. The circular comb carrier 9 is provided with a recess 39 corresponding to the force transmission element 35 at the corresponding point on the circular comb axis 6. In the exemplary embodiment shown, the recess 39 is designed as a cylindrical bore. The bolt 38 engages in the recess 39 on one side of the shoulder 37 and in a through opening in the insert rail 31 on the other side of the shoulder 37.

The bolt 38 is equipped with an O-ring 40 on both sides of the shoulder 37. The O-rings 40 ensure that the bolt 38 is guided in a form-fitting manner free of play in the recess 39 of the circular comb carrier 9 and in the bore of the insert rail 31. Due to the transmission of the acceleration forces through the bolt 38, which allows a radial movement of the circular comb carrier 9, the circular comb carrier 9 can be adjusted in its distance from the insert rail 31. There is no need for the bolt 38 to come to rest on the surface of the circular comb shaft 8 without play, since the insert rail 31 via the shoulder 37 on the bolt 38 with its supports 32 (see FIG Figure 2 ) is pressed against the surface of the round comb shaft 8. The distance C (see Figure 1 ) can be set between the enveloping circle 2 of the comb clothing 13 and the lower tong plate 15 and does not result automatically from the overall height of the circular comb carrier 9.

Figure 4a shows a schematic representation of an adjustment device. The adjustment device comprises a flat wedge 28, which has an inclined support surface 42, and an adjusting screw 29 which engages in an internal thread in the flat wedge 28. Also shown is the opening 30 in the flat wedge 28 for the passage of the connecting screw 24 (see Figure 2 ). The adjusting screw is held on the cover plate 25, on the side of the cover plate 25 facing away from the flat wedge 28 by the screw head the adjusting screw 29 and on the other side by a locking ring 44. In the cover plate 25 a passage in the form of an elongated hole is provided. With the cover plate 25 stationary, the flat wedge 28 is moved in the direction of the axis of the adjusting screw 29 by turning the adjusting screw 29.

Figure 4b shows a schematic representation of a flat wedge 28 in a further embodiment. A curved support surface 43 is provided.

Figure 5 a schematic representation of a first embodiment of the circular comb in a view X according to FIG Figure 2 . The circular comb essentially comprises a circular comb carrier 9, a clothing carrier and a comb clothing attached to it (not shown), wherein in the embodiment shown the circular comb carrier 9 comprises the clothing carrier due to a one-piece construction. A compensating element 33 is arranged on a side of the circular comb shaft 8 opposite the circular comb carrier 9 and is fastened to the circular comb shaft 8 with fastening elements 34. Through the circular comb shaft 8, the circular comb carrier 9 is braced with the compensating element 33 via cross-connecting screws 24 on the circular comb shaft 8. Between the circular comb carrier 9 and the circular comb shaft 8, an insert rail 31 is attached, which is brought into contact with its supports 32 on the surface of the circular comb shaft 8. In addition, between the circular comb carrier 9 and the insert rail 31 is an adjusting device according to the Figure 2 used, the adjusting device comprising a flat wedge 28 and an adjusting screw 29. A cover plate 25 (shown in dashed lines), in which the adjusting screw 29 is held, is attached to the circular comb carrier 9. The adjustment device is used to set a distance A between the circular comb carrier 9 and the insert rail 31.

Figure 6 shows a schematic representation of a second embodiment of the circular comb in a view X according to FIG Figure 2 . The circular comb essentially comprises a circular comb carrier 9, a clothing carrier and a comb clothing attached to it (not shown), wherein in the embodiment shown the circular comb carrier 9 comprises the clothing carrier due to a one-piece construction. A compensating element 33 is arranged on a side of the circular comb shaft 8 opposite the circular comb carrier 9 and fastened to the circular comb shaft 8 with fastening elements 34. Through the circular comb shaft 8, the circular comb carrier 9 is braced with the compensating element 33 via cross-connecting screws 24 on the circular comb shaft 8. Between the circular comb carrier 9 and the circular comb shaft 8, an insert rail 31 is attached, which is brought into contact with its supports 32 on the surface of the circular comb shaft 8. In addition, between the circular comb carrier 30 and the insert rail 31 adjusting devices according to the Figure 2 used, the adjusting devices comprising flat wedges 28 and adjusting screws 29. A cover plate 25 (shown in dashed lines), in which the adjusting screws 29 are held, is attached to the circular comb carrier 9. The adjustment devices serve to set a distance A between the circular comb carrier 9 and the insert rail 31.

Figure 7 shows a schematic representation of a further embodiment of a circular comb according to the invention in a longitudinal section. The circular comb is shown along a circular comb axis 6, the circular comb axis 6 at the same time being the longitudinal axis of the circular comb shaft 8 on which the circular comb is held non-rotatably by a circular comb carrier 9. The circular comb is shown by way of example in an embodiment in which the circular comb carrier 9 and a clothing carrier are shown in one piece, the circular comb carrier 9 having a clothing support surface 41 on a side facing away from the circular comb shaft 8. The combing clothing is held in the form of individual clothing wires or combing elements (not shown) on the clothing support surface 41.

In the embodiment shown, the circular comb carrier 9 is designed as a profile that extends over the entire length of the circular comb, with an insert rail 31 being provided between the circular comb carrier 9 and the circular comb shaft 8. The circular comb carrier 9 is braced with connecting screws 24 on the circular comb shaft 8 via an adjusting device and the insert rail 31. An adjusting device is inserted between the insert rail 31 and the circular comb carrier 9 in an end region 27 of the circular comb carrier 9. The adjusting device serves to set a distance A between the circular comb carrier 9 and the insert rail 31. A cover plate 25 is also fastened with screws 26 at the respective end of the circular comb carrier 9. The adjusting device comprises a flat wedge 28, which is inserted between the insert rail 31 and the circular comb carrier 9, and an adjusting screw 29 for moving the flat wedge 28 in the direction of the circular comb axis 6.

On a side of the circular comb shaft 8 opposite the circular comb carrier 9, a compensating element 33 is fastened to the circular comb shaft 8 with fastening elements 34. The compensating element 33 serves to achieve an almost unbalance-free rotation of the circular comb shaft 8 in spite of a combing set on one side. Due to the separate attachment of the compensating element 33 to the circular comb shaft, the circular comb carrier 9 can be exchanged without having to remove the compensating element 33. The insert rail 31, which is braced on the circular comb shaft 8 with fastening screws 45, can also remain on the circular comb shaft 8. Furthermore, the circular comb carrier 9 and the insert rail 31 are connected to one another via shoulder screws 46 and are pressed against one another by a spring element 47. The shoulder screws 46 provide a simple and exact positioning of the circular comb carrier 8 regardless of its attachment.

Figure 8 shows an enlarged schematic representation of the detail Z according to FIG Figure 7 . The illustration shows the connection between the circular comb support 9 and the insert rail 31 with a fitting shoulder screw 46 and a spring element 47, shown here as a wave spring 47. The fitting shoulder screw 46 is inserted into a recess 50 of the insert rail 31 and screwed into the circular comb support 9. The shoulder 48 of the shoulder screw 46 fits into a recess in the circular comb carrier 9 and forms a fit D with this recess Insert rail 31 must take place opposite the round comb shaft. The wave spring 47 is inserted between the screw head 49 of the shoulder screw 46 and the insert rail 31 and, with its spring force, presses the insert rail 31 against the circular comb carrier 9.

If the connecting screw 24 is now loosened in order to adjust the distance A and, by turning the adjusting screw 29, the flat wedge 28 against the If cover plate 26 is pulled, distance A should decrease (see Figure 7 ). Due to the action of the wave spring 47, the circular comb carrier 9 is constantly drawn to the insert rail 31 until it is in contact with the flat wedge 28 and a play-free adjustment of the distance A succeeds even by a few fractions of a millimeter without any external action on the circular comb carrier 9 must become.

The present invention is not limited to the illustrated and described exemplary embodiments. Modifications and combinations of features within the scope of the patent claims are possible, even if these are shown and described in different exemplary embodiments.

List of reference symbols

1

Combing head

2

Enveloping circle of the comb clothing

3

Swivel arm

4th

Swivel arm

5

Pincer shaft

6th

Round comb axis

7th

Round comb

8th

Round comb shaft

9

Round comb carrier

10

Clothing carrier

11

Counterweight

12th

Screws

13th

Combing clothing

14th

Pliers frame

15th

Lower tong plate

16

Upper tong plate

17th

Whiskers

18th

Feed roller

19th

Cotton wool

20th

Tear-off roller pair

21

Conveying direction

22nd

Non-woven fabric

23

Direction of rotation round comb

24

Connecting screw

25th

Cover plate

26th

screw

27

End area circular comb beam

28

Flat wedge

29

Adjusting screw

30th

Opening in the flat wedge

31

Insert rail

32

In stock

33

Compensation element

34

Fastener

35

Power transmission element

36

Clamping screw

37

shoulder

38

bolt

39

deepening

40

O-ring

41

Clothing support surface

42

Support surface

43

Arched support surface

44

Circlip

45

Insert rail fastening screw

46

Shoulder screw

47

Spring element

48

shoulder

49

Screw head

50

deepening

A.

Distance between the insert rail and the circular comb support

C.

Distance between the lower tong plate and the combing gear

D.

Fit

α

Wedge angle

Claims (15)

1. Circular comb (7) for a comber, the circular comb (7) having a comb clothing (13) and a circular-comb axis (6), comprising a clothing carrier (10) and at least one circular-comb carrier (9), the clothing carrier (10) being held on the circular-comb carrier (9) and the circular-comb carrier (9) being fastened on a circular-comb shaft (8) by means of connecting screws (24), and a cover plate (25) being attached to each end of the circular-comb carrier (9) as seen in the direction of the circular-comb axis (6), characterized in that an insert rail (31) is provided between the circular-comb carrier (9) and the circular-comb shaft (8) and in that at least two adjusting devices are provided between the circular-comb carrier (9) and the insert rail (31) for adjusting a distance (A) between the insert rail (31) and the circular-comb carrier (9).
2. Circular comb (7) according to claim 1, characterized in that the at least two adjusting devices between the circular-comb carrier (9) and the insert rail (31) are provided in each end region (27) of the circular-comb carrier (9).
3. Circular comb (7) according to either claim 1 or claim 2, characterized in that the circular-comb carrier (9) and the clothing carrier (10) are integral with one another.
4. Circular comb (7) according to any of the preceding claims, characterized in that the insert rail (31) is non-positively connected to the circular-comb shaft (8) through a through-opening in the circular-comb shaft (8) by means of a fastening screw (45).
5. Circular comb (7) according to claim 4, characterized in that the insert rail (3) is connected to the circular-comb carrier (9) by means of a fit shoulder screw (46), the shoulder (48) of the fit shoulder screw (46) engaging into a recess in the clothing carrier (9) and a screw head (49) of the fit shoulder screw (46) engaging into a recess (50) in the insert rail (3) on a side of the insert rail (3) opposite the clothing carrier (9) and a spring element (47) being arranged between the insert rail (3) and the screw head (49) of the fit shoulder screw (46).
6. Circular comb (7) according to any of claims 1 to 3, characterized in that the circular-comb carrier (9) is form-fittingly connected to the insert rail (31) by means of a force transmission element (35), the force transmission element (35) being designed as a bolt engaging into a recess (39) in the circular-comb carrier (9) and into a through-opening of the insert rail (31), the bolt having an internal thread, and the bolt being non-positively connected to the circular-comb shaft (8) through a through-opening in the circular-comb shaft (8) by means of a clamping screw (36), an end face of the bolt facing the circular-comb shaft (8) being spaced apart from a surface of the circular-comb shaft (8) by means of a shoulder (37) which is prominent on an outer surface of the bolt and which is supported on the insert rail (31), and by means of a corresponding length of the bolt portion that projects into the insert rail (31).
7. Circular comb (7) according to any of the preceding claims, characterized in that the adjusting devices comprise flat wedges (28) arranged between the insert rail (31) and the circular-comb carrier (9), which flat wedges, starting from each end of the circular-comb carrier (9) in the direction of the circular-comb axis (6), have a continuous cross-sectional taper directed against the insert rail (31) or the circular-comb carrier (9).
8. Circular comb (7) according to claim 7, characterized in that the insert rail (31) is provided with offset supports (32) in the region of the flat wedges (28) for resting against the circular-comb shaft (8).
9. Circular comb (7) according to either claim 7 or claim 8, characterized in that each of the connecting screws (24) of the circular-comb carrier (10) preferably penetrate through an opening (30) provided in the relevant flat wedge (32) and a through-opening provided in the insert rail (31).
10. Circular comb (7) according to any of claims 7 to 9, characterized in that a bearing surface of the flat wedges (28) facing the insert rail (31) is molded onto a contact surface provided on the insert rail (31).
11. Circular comb (7) according to any of claims 7 to 10, characterized in that the continuous cross-sectional taper is provided by a slope of a contact surface (42, 43) of the flat wedge (28) facing the circular-comb carrier (9), the slope having a wedge angle (a) of 11 degrees or less.
12. Circular comb (7) according to claim 10, characterized in that the contact surface (43) of the flat wedge (28) facing the circular-comb carrier (9) is designed having a convex curvature.
13. Circular comb (7) according to any of claims 7 to 12, characterized in that each flat wedge (28) is preferably provided with an adjusting screw (29) held in the relevant cover plate (25), the adjusting screw (29) being arranged with its axis parallel to the circular-comb axis (6).
14. Circular comb (7) according to claim 13, characterized in that the adjusting screw (29) is rotatably held in its axial position in the cover plate (25) and an internal thread is provided in the flat wedge (28), it being possible to set the position of the flat wedge (28) with respect to the circular-comb carrier (9) in the direction of the circular-comb axis (6) by the adjusting screw (29) engaging in the internal thread in the flat wedge (28) by rotating the adjusting screw (29).
15. Combing head (1) having a circular comb (7) and a compensating element (33), the circular comb (7) having a clothing carrier (10) with a clothing contact surface (41) and at least one circular-comb carrier (9) and the circular-comb carrier (9) with the compensating element (33) being arranged on a circular-comb shaft (8) with respect to one another and the clothing carrier (10) being fastened to the circular-comb carrier (9) by means of connecting elements or the circular-comb carrier (9) being integral with the clothing carrier (10), characterized in that the circular comb (7) is designed according to any of the preceding claims.

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