CN112095180A

CN112095180A - Circular comb for combing machine

Info

Publication number: CN112095180A
Application number: CN202010554222.3A
Authority: CN
Inventors: T.布哈德; C.德拉特瓦
Original assignee: Graf und Cie AG
Current assignee: Graf und Cie AG
Priority date: 2019-06-17
Filing date: 2020-06-17
Publication date: 2020-12-18
Anticipated expiration: 2040-06-17
Also published as: CH716329A1; EP3754055B1; CN112095180B; EP3754055A1

Abstract

The invention relates to a circular comb (7) and a combing head (1) for a combing machine, wherein the circular comb (7) has a combing clothing (13) and a circular comb axis (6), and the circular comb comprises a clothing carrier (10) and at least one circular comb carrier (9). The card clothing carrier (10) is held on the circular comb carrier (9), and the circular comb carrier (9) is fastened to the circular comb shaft (8) by means of a connecting screw (24). A cover plate (25) is attached to each end of the circular comb carrier (9) as seen in the direction of the circular comb axis (6). The insertion track (31) is arranged between the circular comb carrier (9) and the circular comb shaft (8). At least one adjusting device is arranged between the circular comb carrier (9) and the insertion track (31) in each end region (27) of the circular comb carrier (9) in order to adjust the distance (A) between the insertion track (31) and the circular comb carrier (9).

Description

Circular comb for combing machine

Technical Field

The invention relates to a circular comb for a combing machine and to a combing head (combing head) having such a circular comb.

Background

Circular combs of this type are used in combing machines for combing the supplied fibre mass (cotton, wool, etc.), which can be supplied in the form of a cotton fleece (batting web) wound on a sleeve or in the form of individual fibre slivers. In recent years, the bite rate (number of bites/minute) has been remarkably increased, which also results in an increase in productivity.

In practice, a circular comb for a combing machine consists of a circular comb carrier which is provided with a clamping hub by means of which the circular comb carrier is fastened to a driven circular comb shaft for rotation therewith. A clothing carrier is fastened to a part of the circumference of the circular comb carrier, which clothing carrier receives the comb clothing (fastening) combing the ends of a fibre mass (also called fibre tuft) presented by a pair of jaws. In an alternative embodiment, a circular comb carrier is used, which is held directly on the driven circular comb shaft.

The demands on such circular combs have increased, for example, the precision of the components needs to be increased in order to achieve a combing effect that exactly matches the fibrous material to be combed. These requirements make it necessary to improve the setting options of the circular comb in the combing head. In particular, an exact setting of the distance between the enveloping circle of the combed clothing and the circular comb axis contributes to an improved combing process. By means of such an adjustment, the distance between the lower clamping plate of the clamp and the enveloping circle of the combing clothing of the circular comb can be set in order to ensure an optimum combing effect. Such adjustability by using arcuate spacer elements is disclosed and described, for example, in DE 29720656U 1. However, for such arcuate elements, an exact setting option down to the minimum step size is not possible. If, for example, the radius of the enveloping circle of the combed clothing of a circular comb is to be changed, the curved spacer element shown in DE 29720656U 1 is exchanged for another curved spacer element having a different thickness, the outer radius of the spacer element projecting in the direction of the carrier being changed, while the inner radius of the carrier (with the aid of which it rests on the spacer element) is kept constant. This may cause tension between the carrier and the spacer element.

Furthermore, EP 2789716 a1 discloses a circular comb with a carrier which is provided with an inner part which projects towards the shaft and has a recess which is open in the direction of the shaft and extends in the longitudinal direction of the hollow profile, and in which recess a support element is received which is supported via a first support surface on the base of the recess and via a second support surface on the outer circumference of the shaft. A replaceable spacer element is disposed between the support element and the base of the recess. This aims to be able to set the radius of the enveloping circle of the combed clothing precisely by simply inserting a precise spacing element between the body and the support element. However, it is disadvantageous that, depending on the existing spacer elements, the distance between the lower clamping plate of the clamp and the enveloping circle of the comb clothing of the circular comb can only be set in a stepwise manner. In addition, in order to readjust the distance, the circular comb must be removed from the combing device in order to be able to replace the spacer elements.

The solution disclosed in EP 3467166 a1 attempts to remedy the drawbacks of the older design. This proposes to adjust the height of the circular comb by using wedge-shaped elements. Wedge elements are disclosed in various embodiments. In one embodiment, the wedge elements are inserted between the circular comb carrier and the comb segment carrier. The disadvantages of this are: special comb segment carriers must be provided which cannot be used on circular comb carriers without height adjustment. In a further embodiment, wedge-shaped elements are introduced between the circular comb carrier and the circular comb shaft. The disadvantages here are: the shape of the wedge-shaped element must be adapted to the circular comb shaft and vice versa in order to obtain sufficient support. Furthermore, the wedge elements will be guided in the axial direction of the circular comb shaft in order to avoid tilting of the wedge elements and thus jamming or damaging the surface of the circular comb shaft when the wedge elements are displaced for height adjustment.

Disclosure of Invention

It is therefore an object of the present invention to provide a circular comb which allows the distance between the lower clamping plate of the clamp and the enveloping circle of the combed clothing of the circular comb to be set continuously, wherein existing combers can be easily retrofitted without reworking parts of the comber or replacing existing clothing carriers.

This object is achieved by a device having the features of the independent claim.

A circular comb for a combing machine is proposed, which has a combing clothing and a circular comb axis and comprises a clothing carrier and at least one circular comb carrier. The card clothing carrier is held on the circular comb carrier, and the circular comb carrier is fastened to the circular comb shaft by means of connecting screws. A cover plate is attached to each end of the circular comb carrier as viewed in the direction of the circular comb axis. The insertion track is arranged between the circular comb carrier and the circular comb shaft. At least two adjusting devices are arranged between the circular comb carrier and the insertion track for adjusting the distance between the circular comb shaft and the circular comb carrier.

Since the lower nipper plate of the nipper is connected to the circular comb shaft, when the distance between the circular comb carrier and the circular comb shaft is adjusted, the distance between the lower nipper plate of the nipper and the enveloping circle of the combed card clothing is also changed.

The insertion rail is in contact with the surface of the circular comb shaft on its side facing away from the circular comb carrier, and the circular comb carrier is connected to the circular comb shaft by means of corresponding connecting elements (e.g., screws or bolts) through the insertion rail. The adjusting device is arranged between the inserting track 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 means and, on the other hand, the adjusting means do not damage the circular comb shaft. Further, a contact surface of the insertion rail, which is in contact with a surface of the circular comb shaft, may be matched with the circular comb shaft. By proper design and material pairing, stick-slip effects can be reduced or even eliminated, resulting in higher setting accuracy. There is also protection against excessive tightening and possible permanent deformation, which may reduce service life and setting accuracy. Advantageously, the entire length of the insertion track is not used for contacting, but rather a certain region around the fastening point of the circular comb carrier is designed as a separate support. By this design, the proposed device can be easily adapted to the conditions in existing systems and the circular comb can be simply switched.

The card clothing carrier has a card clothing contact surface on its side facing away from the circular comb shaft. The comb clothings are fastened to the clothed contact surfaces by suitable means, for example by means of screws, clamps, or by welding or gluing. In this case, a combed clothing consisting of a separate steel wire band (wire strip) attached to the clothing contact surface or a combed clothing consisting of prefabricated combing elements attached to the clothing contact surface is used. The card cloth contact surfaces are arranged in the shape of segments of a circle around the circular comb axis. The circular comb carrier and the card clothing carrier are advantageously formed in one piece with one another. The card cloth contact surface is formed by the outer surface of the circular comb carrier.

At least two adjusting devices between the circular comb carrier and the insertion track are advantageously arranged in each end region of the circular comb carrier. The fact that the adjustment means are arranged at the outer ends of the circular comb allows to easily set the adjustment means from the sides of the circular comb. The circular comb carrier can also be supported more stably on the adjusting devices if the adjusting devices are arranged at a greater distance from each other.

Advantageously, the insertion rail is connected to the circular comb shaft in a force-fitting manner by means of a fastening screw through a through-opening in the circular comb shaft. This design ensures a simple connection between the circular comb shaft and the insertion rail. The insertion track is immovably connected to the circular comb shaft. When readjusting the adjusting device, the connection does not have to be released, which contributes to an improved accuracy of the adjustment.

The insertion rail is preferably connected to the circular comb carrier by means of a mating shoulder screw, the shoulder of which engages into a recess in the clothing carrier and the screw head of which engages into a recess in the insertion rail on the opposite side of the insertion rail to the clothing carrier, and the spring element is arranged between the insertion rail and the screw head of the mating shoulder screw. The spring element does not impede the actuation of the adjusting device. The advantage of the spring element is that there is always a retaining force between the card cloth carrier and the insertion track when the distance between the insertion track and the card cloth carrier changes. This has a particularly positive effect if the distance is reduced. In this case, the card cloth carrier is pulled by the spring element towards the insertion track, and the distance can be adjusted at any time without play. A wave spring with a minimum restoring force of 70N is particularly preferably used as the spring element.

By using mating shoulder screws, the screws can be screwed firmly with their shoulders into the clothing carrier and also result in a positive positioning of the clothing carrier on the insertion track. When changing card clothing carriers, it is not necessary to realign in the direction of the circular comb axis. This is also because the insertion track does not have to change its position on the circular comb axis in order to change the card cloth carrier.

In an alternative embodiment, the circular comb carrier is advantageously connected to the insertion rail in a form-fitting manner by means of a force transmission element, which is designed as a bolt that engages into a recess in the circular comb carrier and into a through-opening of the insertion rail, which bolt has an internal thread, and which bolt is connected to the circular comb shaft by means of a screw in a force-fitting manner through the through-opening in the circular comb shaft. The end face of the bolt facing the circular comb shaft is spaced from the surface of the circular comb shaft by means of a shoulder which projects on the outer surface of the bolt and is supported on the insertion track, and by means of a corresponding length of the bolt portion projecting into the insertion track. As a result, the end surface of the bolt facing the circular comb shaft does not contact the surface of the circular comb shaft. This design allows the insertion rail to be clamped by the circular comb shaft, the bolt parts projecting into the circular comb carrier both allowing the exact positioning of the circular comb carrier and the transmission of the centrifugal forces, acceleration and braking forces acting on the circular comb carrier during the operation of one revolution during the combing process, as well as the necessary transferable torques at the shaft coupling points on the circular comb shaft. This also means that the insertion track is connected to the circular comb shaft, irrespective of the attachment of the circular comb carrier.

The use of one O-ring or advantageously two O-rings allows the insertion of the bolt into the circular comb carrier and the insertion track without play. In power transmission, O-rings serve as damping elements which counteract the wear due to the occurring acceleration forces and help reduce the wear on the components by reversing the direction of these occurring forces. The fit between the bolt and the circular comb carrier is advantageously chosen such that the O-ring and the surfaces support each other for maximum service life and power transfer. The support can be produced more easily, since the power transmission no longer has to be absorbed by the frictional connection between the circular comb carrier and the circular comb shaft. In the case of very high acceleration forces, in an alternative embodiment, a transition fit or press fit can be provided between the bolt and the circular comb carrier or the insert rail. In this case, it is advantageous to use different material pairings (such as aluminum and bronze) in order to prevent contact corrosion or fusion.

Advantageously, the adjusting means comprise a plate wedge (flat wedge) arranged between the insertion track and the circular comb carrier, said plate wedge starting from each end of the card cloth carrier in the direction of the circular comb axis and having a continuous cross-sectional taper directed towards the insertion track or the circular comb carrier. The cross-sectional taper changes the distance between the insertion track and the circular comb when the plate wedge is moved in the direction of the circular comb axis. The design of the plate-type wedge is adapted to the shape of the circular comb carrier and the insertion track. Since the plate wedges do not come into contact with the cylinder shaft or the card clothing carrier, the plate wedges can be adapted exactly to the conditions in the cylinder, independently of these components which are usually present.

Each connecting screw of the circular comb carrier preferably engages in the circular comb shaft via an opening provided in the associated plate wedge and a through opening provided in the insertion track. As a result, the connecting screw of the circular comb carrier can also be used for fixing the adjusting device. Depending on the existing design of the circular comb shaft, the connecting screw can be screwed into an internal thread in the circular comb shaft or an internal thread in the circular comb carrier, or into a threaded nut of the circular comb carrier for tensioning the circular comb carrier with the circular comb shaft. Also, guiding the connecting element through the opening of the plate wedge prevents the plate wedge from slipping out to the side during adjustment.

After the connecting screws for fastening the circular comb carrier to the circular comb shaft have been loosened, the adjustment device can be used to easily set the distance between the lower clamping plate and the enveloping circle of the combed clothing on the clothing carrier, without having to remove the circular comb from the combing head when changing the setting. In the installed state, the setting can also be checked directly by measuring the distance between the lower nipper plate and the enveloping circle of the combed clothing on the clothing carrier. For this purpose, the circular comb in the mounted state can be rotated into a measuring position in which the distance can be set and measured. After the setting has been carried out, the circular comb carrier is fixed again by simply tightening the connecting screws for fastening it to the circular comb shaft. The device allows height adjustment in the measuring position without having to pivot the circular comb for adjustment and fixing, or even without having to remove the circular comb from the machine for height adjustment.

Advantageously, the bearing surface of the plate wedge facing the circular comb carrier is integrally formed on a contact surface provided on the insertion track. By aligning the shapes of the insertion rail and the plate wedge at their points of contact, a zero clearance contact of the plate wedge with the surface of the insertion rail is achieved. In addition, the following options exist: incorporating contours (e.g., longitudinal grooves) to obtain guided displacement of the plate wedges along the circular comb axis.

The continuous cross-sectional taper is provided by a bevel of the plate wedge facing the contact surface of the circular comb carrier, the bevel having a wedge angle of 11 degrees or less. The selection of a wedge angle of less than 11 degrees ensures self-locking of the plate wedge. As a result, the plate wedge remains in its position when the connecting screw of the circular comb carrier is tightened with the circular comb shaft. In addition, the angle of the plate wedge is selected so that the static friction condition of the system is not overcome by the screw force. The plate wedge preferably has a wedge angle of 10 degrees.

The contact surface of the plate wedge facing the circular comb carrier is advantageously designed with a convex curvature. The small curvature of the contact surface results in a defined support (theoretical line) of the circular comb carrier on the plate wedge. Furthermore, due to the curvature, the inclination from the left to the right side of the circular comb can be adjusted exactly to the possible inclination of the nippers, so that an optimal combing performance is obtained. If different heights are set on the left and right side, this results in a wire support which, depending on the size of the angle, moves further away from the axis of the connection screw. This causes deformation and height errors when tightening the connection screw. The curvature creates a defined center contact surface regardless of the side-to-side offset. By dividing the curved surface into two parts, the insert rail (which is molded onto the circular comb shaft and is designed as a flat surface on the side facing away from the circular comb shaft) results in significant advantages of the insert rail and the wedge in terms of manufacturing and thus manufacturing costs.

Preferably, each plate wedge is provided with an adjustment screw retained in the associated covering plate, the adjustment screw being arranged with its axis parallel to the axis of the circular comb. Since the adjusting screw is held in the cover plate, the comb carrier can be removed without losing the plate wedge. The plate wedges are removed from the combing head together with the cover plates connected to the circular comb carrier. Furthermore, the axially parallel arrangement of the adjusting screws allows the plate wedges to be adjusted on the end face from the outside of the circular comb. It is not necessary to remove the circular comb or parts thereof for adjustment.

Furthermore, the adjusting screw is preferably rotatably held in its axial position in the cover plate and an internal thread is provided in the plate wedge, the position of which can be set in the direction of the circular comb axis relative to the circular comb carrier by: the adjustment screw is engaged in an internal thread in the plate wedge by rotating the adjustment screw. Since the axial position of the adjusting screw does not change even during rotation due to the axial fixation, the thread of the adjusting screw (which engages with the internal thread of the plate wedge) is used to axially displace the plate wedge relative to the circular comb axis in accordance with the pitch of the internal thread. Both the plug-in track and the plate wedge do not change their axial position, as a result of which the circular comb carrier and the plug-in track are driven radially apart or brought together as a result of the displacement of the plate wedge. Since the cover plate is fastened to the circular comb carrier, the cover plate moves its position relative to the plate wedge and thus relative to the adjusting screw. Due to this, through openings in the form of slots or correspondingly large holes will advantageously be provided in the cover plate. For example, a retaining ring (also referred to as a retaining ring) may be used to axially secure the set screw. Alternatively, it is also possible to provide a corresponding shape of the passage opening in the cover plate and the adjusting screw in order to achieve an axial retention of the adjusting screw. The insertion of the collar is an easy to assemble and cost-effective design for holding the adjusting screw in its axial position.

The opening in the plate wedge is advantageously designed as a hole, groove or slit which opens out to the side facing away from the end of the clothing carrier. The open slit design allows for easy replacement of the plate wedge without completely separating the circular comb carrier from the insertion track. Also, the design in the form of an open slit prevents the plate wedge from slipping out to the side during adjustment after loosening the connection screw. On the other hand, the advantage of designing the openings as holes or slots is that the plate wedge has a high compact contact surface.

The distance between the insertion track and the circular comb carrier is advantageously between 0 mm and 1.5 mm. It has been found that by using plate wedges, this distance can be adjusted and is also sufficient for the necessary adjustment of the distance between the lower clamping plate of the gripper and the enveloping circle of the combed clothing for the fibrous material to be processed in the combing installation.

At least two adjusting devices are preferably arranged in each end region of the circular comb carrier. The direction of rotation of the circular comb produces an entry side, which, in the case of the entry side, is the part of the combing clothing that first meets the fibre tuft to be combed. The circular comb moves through the fiber tuft as a result of its rotation until it leaves the tuft again on the outlet side of the combing clothing. The combing clothing is arranged together with its enveloping circle, usually concentrically with respect to the circular comb axis. However, it has been shown that 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 the inlet side of the combed clothing advantageously differs from the distance between the clothing carrier and the circular comb carrier on the outlet side of the combed clothing by approximately 0.1 mm to 1.5 mm. The arrangement of two adjusting devices in each end region of the circular comb offers the following possibilities: the distances on the inlet side and the outlet side can be adjusted in different ways, as a result of which the combing process can be optimally matched to the requirements set by the fibrous material to be combed.

A combing head with a circular comb having a clothing carrier with a clothing contact surface and having at least one circular comb carrier and with a counterweight or balancing element (balancing element) is also proposed, and the circular comb carrier and the counterweight or balancing element are arranged relative to one another on a circular comb shaft, the circular comb being designed as described above.

It is advantageous here that the counterweight is held on the circular comb shaft by means of fastening elements for rotation therewith, independently of the circular comb carrier. This allows the circular comb carrier to be replaced without having to remove the weights from the circular comb shaft. This is particularly advantageous when using pre-assembled circular combs which are set for a specific combing process. Once set, the set comprising the circular comb carrier, the card clothing carrier, the adjusting device and the combing card clothing can be easily exchanged.

Drawings

Further advantages of the invention are described in the following examples. In the drawings:

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

figure 2 is a schematic illustration of an embodiment of a circular comb according to the present invention, shown in longitudinal section;

fig. 3 is an enlarged schematic illustration of detail Y according to fig. 2;

fig. 4a is a schematic illustration of an adjustment device;

FIG. 4b is a schematic illustration of a plate wedge in a further embodiment;

fig. 5 is a schematic illustration of a first embodiment of a circular comb according to fig. 2, shown along a viewing angle X;

fig. 6 is a schematic illustration of a second embodiment of a circular comb according to fig. 2, shown along a viewing angle X;

figure 7 is a schematic illustration of a further embodiment of a circular comb according to the present invention, shown in longitudinal section; and

fig. 8 is an enlarged schematic view of detail Z according to fig. 7.

Detailed Description

Fig. 1 is a schematic side view of a combing head 1 of a combing machine according to the prior art. In the known combing machine, for example, eight such combing heads 1 are arranged adjacent to each other. The combing head 1 (of which only some are shown) has a clamping unit which is mounted in the frame of the combing machine so as to be able to be pivoted to and fro about a clamping jaw axis 5 and a circular comb axis 6 by means of pivot arms 3 and 4. The jaw shaft 5 is driven by a driver (not shown in more detail) in order to impart a reciprocating movement to the jaw unit. A circular comb shaft 8 is arranged in the circular comb axis 6, on which the circular comb 7 is fastened for rotation therewith. The circular comb shaft 8 together with its circular comb axis 6 is likewise driven continuously or discontinuously by a drive (not shown) in the direction of rotation 23. In the known solution shown, the circular comb 7 fastened to the circular comb shaft 8 below the clamping unit consists of two circular comb carriers 9 fastened to the circular comb shaft 6 so as to be fixedly spaced apart from one another in the direction of the circular comb axis 6 and to whose outer circumference a clothing carrier 10 is fastened on one side and a counterweight 11 is fastened on the other side. As schematically shown, the counterweight 11 is fastened by means of screws 12, by means of which the counterweight 11 is fastened to the circular comb carrier 9. The clothing carrier 10 is likewise firmly connected to the circular comb carrier 9 via schematically illustrated connecting elements 24. The combing clothing 13 is fastened above the clothing carrier 10, which, like the counterweight 11, extends over the entire length L of the circular comb 7 (see fig. 4). 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 clamping unit is formed by a clamping frame 14, to which a lower clamping plate 15 and an upper clamping plate 16 are fastened. In the embodiment shown, the nipper unit is closed and the fibre tuft 17 protruding from the nip (nip) of the nipper unit is gripped and combed by the combed clothing 13. Combing is essentially determined by the distance C between the lower nipper plate 15 and the enveloping circle 2 of the combed clothing 13. Also in the jaw frame 14, a feed roller 18 is rotatably mounted above the lower jaw plate 15, which feed roller is driven in a stepwise manner, for example by a ratchet drive (not shown). Via this feed roller 18, the batt 19 (or individual sliver) fed to the combing device 1 is fed to the nip of the nipper unit. After combing the fibre tuft 17, the nipper unit is pivoted in the direction of a downstream pair of separating rollers 20. During this pivoting process, the gripper unit opens and the combed end of the batt 19 or the fibre tuft 17 rests on the end of the previously formed nonwoven 21 and is joined (solder) to it under the action of the nip of the separating roller 20 and is transported away in the conveying direction 22.

Fig. 2 shows a schematic illustration of an embodiment of a circular comb according to the invention in longitudinal section. The circular comb is shown along a circular comb axis 6, which circular comb axis 6 is also the longitudinal axis of a circular comb shaft 8, on which the circular comb is held by means of a circular comb carrier 9 for rotation therewith. In the embodiment in which the circular comb carrier 9 and the card clothing carrier are shown as one piece, the circular comb is shown by way of example, the circular comb carrier 9 having a card clothing contact surface 41 on the side facing away from the circular comb shaft 8. The combed clothing is held (not shown) on the clothing contact surface 41 in the form of individual clothing wires or combing elements.

In the exemplary embodiment shown, the circular comb carrier 9 is designed as a continuous profile over the entire length of the circular comb, and the insertion track 31 is arranged between the circular comb carrier 9 and the circular comb shaft 8. The circular comb carrier 9 is clamped to the circular comb shaft 8 by means of the connecting screws 24 via the adjusting device and the insertion rail 31. For this purpose, the insertion track 31 is provided with supports 32 which are molded onto the surface of the circular comb shaft 8 and are provided at least in the region of the connecting screws 24. The adjustment means comprise a plate wedge 28 provided with an opening 30 for the passage of the connection screw 24. The plate-type wedges 28 have inclined contact surfaces 42 for abutting the circular comb carrier 9. A connecting screw 24 is guided through the circular comb shaft 8 in order to hold the circular comb carrier 9 on the circular comb shaft 8 for rotation therewith. However, in the embodiment shown, a force transmission element 35 is provided for transmitting acceleration forces between the circular comb carrier 9 and the circular comb shaft 8, which force transmission element is fastened to the circular comb shaft 8 by means of a clamping screw 36.

The adjusting device is inserted between the insertion track 31 and the circular comb carrier 9 in the end region 27 of the circular comb carrier 9. The adjustment means are used to set the distance a between the circular comb carrier 9 and the insertion track 31. A cover plate 25 is also fastened to each end of the circular comb carrier 9 by means of screws 26. The adjusting device comprises: a plate-type wedge 28 interposed between the insertion track 31 and the circular comb carrier 9; and an adjusting screw 29 for moving the plate wedge 29 in the direction of the circular comb axis 6. A cover plate 25 is also fastened to each end of the circular comb carrier 9 by means of screws 26. The cover plate 25 serves both as a contamination prevention member and for rotatably holding the adjustment screw 29. The adjusting screw 29 is held firmly in the covering plate 25 in the direction of the circular comb axis 6, for example by means of a collar 44 (see fig. 4 a) which is attached to the adjusting screw 29 on the side of the covering plate 25 opposite to the screw head of the adjusting screw 29. The adjusting screw 29 engages in an internal thread in the plate-shaped wedge 28, whereby the plate-shaped wedge 28 is displaced in the direction of the circular comb axis 6 when the adjusting screw 29 is rotated, while the insertion track 31 and the circular comb carrier 9 remain in place. The insertion track 31 and the circular comb carrier 9 are thus changed in their spacing a to an extent which depends on the pitch of the adjusting screw 29 and the wedge angle α provided on the plate wedge 28.

On the side of the circular comb shaft 8 opposite to the circular comb carrier 9, a balancing element 33 is fastened to the circular comb shaft 8 by means of a fastening element 34. The balancing element 33 is also used to achieve a virtually unbalanced rotation of the circular comb shaft 8 despite the presence of the combing clothing on one side. Since the balance element 33 is separately fastened to the circular comb shaft, the circular comb carrier 9 can be replaced without having to remove the balance element 33. The insertion track 31 and the force transmission element 35 can also be held on the circular comb shaft 8. This provides a simple and exact positioning of the circular comb carrier 8, irrespective of its attachment.

Fig. 3 is an enlarged schematic illustration of a detail Y with a force transmission element 35 according to fig. 2. The force transmission element 35 in the form of a cylindrical bolt 38 is provided with a shoulder 37 in the region between the circular comb carrier 9 and the insertion rail 31. This shoulder 37 is pulled against the insertion rail 31 by the clamping screw 36, as a result of which the insertion rail 31 is clamped on the circular comb shaft 8. The circular comb carrier 9 is provided with a recess 39 corresponding to the force transmission element 35 at a corresponding point on the circular comb axis 6. In the embodiment shown, the recess 39 is designed as a cylindrical bore. The bolt 38 engages in the recess 39 in one side of the shoulder 37 and in a through opening in the insertion rail 31 on the other side of the shoulder 37.

The bolt 38 is provided with an O-ring 40 on each side of the shoulder 37. The O-ring 40 ensures that the bolt 38 is guided in a play-free, form-fitting manner in the recess 39 of the circular comb carrier 9 and in the hole of the insertion rail 31. Since the acceleration force is transmitted by the bolts 38, which allows the circular comb carrier 9 to move radially, the distance of the circular comb carrier 9 from the insertion track 31 can be set. The bolt 38 does not necessarily contact the surface of the circular comb shaft 8 with a clearance, because the support 32 inserted into the rail 31 is pressed against the surface of the circular comb shaft 8 via the shoulder 37 on the bolt 38 (see fig. 2). Correspondingly, the distance C (see fig. 1) between the enveloping circle 2 of the combed clothing 13 and the lower nipper plate 15 can be set and is not automatically generated by the height of the circular comb carrier 9.

Fig. 4a is a schematic illustration of an adjustment device. The adjusting device comprises: plate wedges 28 having inclined contact surfaces 42; and an adjusting screw 29 which engages in an internal thread in the plate wedge 28. Also shown is an opening 30 in plate wedge 28 for passage of a coupling screw 24 (see FIG. 2). The adjusting screw is held on the cover plate 25 by means of the screw head of the adjusting screw 29 on the side of the cover plate 25 facing away from the plate wedge 28 and on the other side by means of the retaining ring 44 on the cover plate 25. An opening in the form of a slot is provided in the cover plate 25. When the cover plate 25 is fixed, the plate wedge 28 is moved in the direction of the axis of the adjustment screw 29 by rotating the adjustment screw 29.

Fig. 4b is a schematic illustration of a plate wedge 28 in a further embodiment. An arched contact surface 43 is provided.

Fig. 5 is a schematic illustration of a first embodiment of a circular comb according to fig. 2, shown along a viewing angle X. The circular comb basically comprises a circular comb carrier 9, a card clothing carrier and a combed card clothing (not shown) fastened to the card clothing carrier; in the embodiment shown, the circular comb carrier 9 comprises a card cloth carrier due to the one-piece design. The balancing element 33 is arranged on the opposite side of the circular comb shaft 8 from the circular comb carrier 9 and is fastened to the circular comb shaft 8 by means of a fastening element 34. By means of the circular comb shaft 8, the circular comb carrier 9 together with the balancing element 33 is clamped to the circular comb shaft 8 by means of a through-type connecting screw 24. An insertion track 31 is provided between the circular comb carrier 9 and the circular comb shaft 8, and a support 32 of the insertion track is in contact with a surface of the circular comb shaft 8. In addition, an adjusting device according to fig. 2 is inserted between the circular comb carrier 9 and the insertion track 31, said adjusting device comprising a plate-shaped wedge 28 and an adjusting screw 29. A cover plate 25 (shown in phantom) is attached to the circular comb carrier 9, in which a set screw 29 is retained. The adjustment means are used to set the distance a between the circular comb carrier 9 and the insertion track 31.

Fig. 6 is a schematic illustration of a second embodiment of a circular comb according to fig. 2, shown along a viewing angle X. The circular comb basically comprises a circular comb carrier 9, a card clothing carrier and a combed card clothing (not shown) fastened to the card clothing carrier; in the embodiment shown, the circular comb carrier 9 comprises a card cloth carrier due to the one-piece design. The balancing element 33 is arranged on the opposite side of the circular comb shaft 8 from the circular comb carrier 9 and is fastened to the circular comb shaft 8 by means of a fastening element 34. By means of the circular comb shaft 8, the circular comb carrier 9 together with the balancing element 33 is clamped to the circular comb shaft 8 by means of a through-type connecting screw 24. An insertion track 31 is provided between the circular comb carrier 9 and the circular comb shaft 8, and a support 32 of the insertion track is in contact with a surface of the circular comb shaft 8. In addition, an adjusting device according to fig. 2 is inserted between the circular comb carrier 30 and the insertion track 31, said adjusting device comprising a plate-shaped wedge 28 and an adjusting screw 29. A cover plate 25 (shown in phantom) is attached to the circular comb carrier 9, in which a set screw 29 is retained. The adjustment means are used to set the distance a between the circular comb carrier 9 and the insertion track 31.

Figure 7 is a schematic illustration of a further embodiment of a circular comb according to the present invention, shown in longitudinal section. The circular comb is shown along a circular comb axis 6, which circular comb axis 6 is also the longitudinal axis of a circular comb shaft 8, on which the circular comb is held by means of a circular comb carrier 9 for rotation therewith. In the embodiment in which the circular comb carrier 9 and the card clothing carrier are shown as one piece, the circular comb is shown by way of example, the circular comb carrier 9 having a card clothing contact surface 41 on the side facing away from the circular comb shaft 8. The combed clothing is held (not shown) on the clothing contact surface 41 in the form of individual clothing wires or combing elements.

In the exemplary embodiment shown, the circular comb carrier 9 is designed as a continuous profile over the entire length of the circular comb, and the insertion track 31 is arranged between the circular comb carrier 9 and the circular comb shaft 8. The circular comb carrier 9 is clamped to the circular comb shaft 8 by means of the connecting screws 24 via the adjusting device and the insertion rail 31. The adjusting device is inserted between the insertion track 31 and the circular comb carrier 9 in the end region 27 of the circular comb carrier 9. The adjustment means are used to set the distance a between the circular comb carrier 9 and the insertion track 31. A cover plate 25 is also fastened to each end of the circular comb carrier 9 by means of screws 26. The adjusting device comprises: a plate-type wedge 28 interposed between the insertion track 31 and the circular comb carrier 9; and an adjusting screw 29 for moving the plate wedge 29 in the direction of the circular comb axis 6.

On the side of the circular comb shaft 8 opposite to the circular comb carrier 9, a balancing element 33 is fastened to the circular comb shaft 8 by means of a fastening element 34. The balancing element 33 is also used to achieve a virtually unbalanced rotation of the circular comb shaft 8 despite the presence of the combing clothing on one side. Since the balance element 33 is separately fastened to the circular comb shaft, the circular comb carrier 9 can be replaced without having to remove the balance element 33. The insertion track 31 can also be held on the circular comb shaft 8, which insertion track is clamped to the circular comb shaft 8 by means of a fastening screw 45. Furthermore, the circular comb carrier 9 and the insertion rail 31 are connected to one another by means of mating shoulder screws 46 and are pressed against one another by spring elements 47. The mating shoulder screws 46 provide a simple and exact positioning of the circular comb carrier 8 regardless of its attachment.

Fig. 8 is an enlarged schematic view of detail Z according to fig. 7. The illustration shows the connection between the circular comb carrier 9 and the insertion rail 31 by means of a mating shoulder screw 46 and a spring element 47, here illustrated as a wave spring 47. The mating shoulder screw 46 is inserted into the recess 50 of the insertion rail 31 and screwed into the circular comb carrier 9. The fitting shoulder screw 46 is fitted with its shoulder 48 into the recess of the circular comb carrier 9 and forms a fitting portion D with the recess. The advantage of the fitting D is that the circular comb carrier 9 is automatically positioned relative to the insertion track 31 and therefore the insertion track 31 has to be set once relative to the circular comb axis. The wave spring 47 is inserted between the screw head 49 of the mating shoulder screw 46 and the insertion rail 31, and presses the insertion rail 31 against the circular comb carrier 9 using its spring force.

If the connecting screw 24 is now loosened so that the distance a is adjusted and the plate wedge 28 is pulled against the cover plate 26 by rotating the adjusting screw 29, the distance a should be reduced (see fig. 7). Due to the action of the wave spring 47, the circular comb carrier 9 is continuously pulled upwards against the insertion track 31 until it abuts the plate wedge 28, and the distance a can be adjusted without play even by a fraction of a millimeter without acting on the circular comb carrier 9 from the outside.

The invention is not limited to the embodiments shown and described. Within the scope of the claims, modifications are possible and combinations of features are possible even though these features are shown and described in different embodiments.

List of reference numerals

1 combing head

2 enveloping circle of combed card clothing

3 pivoting arm

4 pivoting arm

5 Clamp shaft

6 round comb axis

7 round comb

8 round comb shaft

9 round comb carrier

10-card clothing carrier

11 balance weight

12 screw

13 combed card clothing

14 clamp frame

15 lower clamping plate

16 upper clamping plate

17 fiber cluster

18 feed roll

19 Cotton batting

20 a pair of separation rollers

21 direction of conveyance

22 nonwoven fabric

Direction of rotation of 23 circular comb

24 connecting screw

25 overlay plate

26 screw

27 end region of circular comb carrier

28 plate wedge

29 adjusting screw

30 openings in plate wedges

31 insert rail

32 support piece

33 balance element

34 fastening element

35 power transmission element

36 clamping screw

37 shoulder

38 bolt

39 depression

40O-ring

41 card clothing contact surface

42 contact surface

43 arcuate contact surface

44 retainer ring

45 fastening screw inserted into rail

46 cooperating shoulder screw

47 spring element

48 shoulder

49 screw head

50 recessed part

A distance between the insertion track and the circular comb carrier

Distance between the nipper and the card clothing under C

D fitting part

The wedge angle alpha.

Claims

1. A circular comb (7) for a combing machine, the circular comb (7) having a combing clothing (13) and a circular comb axis (6), the circular comb (7) 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 to 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),it is characterized in that: an insertion track (31) is arranged between the circular comb carrier (9) and the circular comb shaft (8); and at least two adjusting devices are arranged atBetween the circular comb carrier (9) and the insertion track (31) for adjusting the distance (A) between the insertion track (31) and the circular comb carrier (9).

2. Circular comb (7) according to claim 1,it is characterized in that: the at least two adjusting devices between the circular comb carrier (9) and the insertion track (31) are arranged in each end region (27) of the circular comb carrier (9).

3. Circular comb (7) according to claim 1 or claim 2,it is characterized in that: the circular comb carrier (9) and the card clothing carrier (10) are formed in one piece with each other.

4. Circular comb (7) according to any of the preceding claims,it is characterized in that: the insertion rail (31) is connected to the circular comb shaft (8) in a force-fitting manner by means of a fastening screw (45) through a through-opening in the circular comb shaft (8).

5. Circular comb (7) according to claim 4,it is characterized in that: the insertion rail (3) is connected to the circular comb carrier (9) by means of a mating shoulder screw (46), a shoulder (48) of the mating shoulder screw (46) engages into a recess in the clothing carrier (9) and a screw head (49) of the mating shoulder screw (46) engages into a recess (50) in the insertion rail (3) on the opposite side of the insertion rail (3) from the clothing carrier (9), and a spring element (47) is arranged between the insertion rail (3) and the screw head (49) of the mating shoulder screw (46).

6. Circular comb (7) according to any of claims 1 to 3,it is characterized in that: the circular comb carrier (9) is connected to the insertion track (31) in a form-fitting manner by means of a force transmission element (35), wherein the force transmission element (35) is designed to be connectedA bolt which engages in a recess (39) in the circular comb carrier (9) and in a through-opening of the insertion track (31), which bolt has an internal thread and is connected by means of a clamping screw (36) with a force-fitting manner to the circular comb shaft (8) through the through-opening in the circular comb shaft (8), and the end face of which bolt facing the circular comb shaft (8) is spaced apart from the surface of the circular comb shaft (8) by means of a shoulder (37) which projects on the outer surface of the bolt and bears on the insertion track (31) and by means of a corresponding length of the bolt portion which projects into the insertion track (31).

7. Circular comb (7) according to any of the preceding claims,it is characterized in that: the adjusting device comprises a plate-shaped wedge (28) arranged between the insertion track (31) and the circular comb carrier (9), starting from each end of the circular comb carrier (9) in the direction of the circular comb axis (6), with a continuous cross-sectional taper directed towards the insertion track (31) or the circular comb carrier (9).

8. Circular comb (7) according to claim 7,it is characterized in that: the insertion track (31) is provided with an offset support (32) in the region of the plate wedge (28) for resting against the circular comb shaft (8).

9. Circular comb (7) according to claim 7 or claim 8,it is characterized in that: each of the connecting screws (24) of the circular comb carrier (10) preferably penetrates an opening (30) provided in the associated plate wedge (32) and a through opening provided in the insertion track (31).

10. Circular comb (7) according to any of claims 7 to 9,it is characterized in that: the bearing surfaces of the plate-type wedges (28) facing the insertion rail (31) are molded to be arrangedOn a contact surface on the insertion track (31).

11. Circular comb (7) according to any of claims 7 to 10,it is characterized in that: the continuous cross-sectional taper is provided by an inclined surface of the plate wedge (28) facing a contact surface (42, 43) of the circular comb carrier (9), the inclined surface having a wedge angle (a) of 11 degrees or less.

12. Circular comb (7) according to claim 10,it is characterized in that: the contact surface (43) of the plate-type wedge (28) facing the circular comb carrier (9) is designed to have a convex curvature.

13. Circular comb (7) according to any of claims 7 to 12,it is characterized in that: each plate wedge (28) is preferably provided with an adjusting screw (29) held in the associated covering plate (25), said adjusting screw (29) being arranged with its axis parallel to the circular comb axis (6).

14. Circular comb (7) according to claim 13,it is 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 plate wedge (28), the position of the plate wedge (28) being settable relative to the circular comb carrier (9) in the direction of the circular comb axis (6) by: -engaging the adjustment screw (29) in the internal thread in the plate wedge (28) by rotating the adjustment screw (29).

15. A combing head (1) having a circular comb (7) and a balancing element (33), the circular comb (7) having a clothing carrier (10) with a clothing contact surface (41) and having at least one circular comb carrier (9), and the circular comb carrier (9) and the balancing element (33) being arranged relative to one another on a circular comb shaft (8), andand the clothing carrier (10) is fastened to the circular comb carrier (9) by means of a connecting element or the circular comb carrier (9) is formed in one piece with the clothing carrier (10),it is characterized in that In that: the circular comb (7) is designed as claimed in one of the preceding claims.