EP1201797A1 - Device and method for adjusting the working gap between the tips of the clothing of the flats and the cylinder of a carding machine - Google Patents

Abstract

An assembly sets the working gap between top and bottom carding comb teeth located on a drum sector with a smooth convex sliding surface. The overhead teeth have smooth heads which engage in the fibre slip guides. The components forming the slip guides are supported at a series of discrete points may move back and forth around the drum with respect to these points. The slip guide surfaces move radially to set the working gap between the cap and drum. Also claimed is a process to adjust the working gap.

Description

The present invention relates to an apparatus and a method for adjustment of the working gap between the tips of the cover sets and the tips of the A carding drum set, with the flat bars provided with sets over a partial area of the drum circumference on both sides of the card on respective sliding guides having convexly curved sliding surfaces are guided, the Flat bars have flat heads with sliding surfaces which run along the Sliding guides slide, the sliding guides each formed by a curved part are and the radial position of the sliding surfaces of the sliding guides based on the The axis of rotation of the drum can be changed by changing the position of the parts.

Devices of this type are known in various designs.

For example, the old US patent 528007 from October 23, 1894 describes one Revolving flat card, in which the flat bars provided with flat sets are attached to their Ends are attached to respective endless chains and by means of these endless chains are pulled over slide guides provided on both sides of the card, so that the clothing tips relative to the clothing tips of the drum and in one constant distance from this over a portion of the circumference of the drum be moved and thereby perform the desired carding work. After the move The flat bars are deflected around a pair of sprockets along the slide guides and returned to another sprocket, which also serves as a deflection point, and get back on the sliding guides in this way, so that they are back with the Clothing tips of the drum can perform the desired carding work. Consequently the flat bars always come onto the sliding guide and perform repeatedly Carding with the drum.

At the ends of the flat bars there are so-called lid heads, which Have sliding surfaces on the respective sliding guides on both sides of the Slip card. These sliding surfaces determine with the sliding surfaces of the sliding guides the distance between the tips of the cover sets and the tips of the Drum sets. This distance must be in the manufacture of the card and at The card's re-yarning can be adjusted precisely, taking one nowadays Carding distances, i.e. Clearances between the tips of the lid sets and the Aim for a drum set in the range of about 0.2 mm. Only then is a high quality Carding work possible with high card production.

When setting this carding gap, the sliding guide on the card is after the US-PS 528007 radially adjusted relative to the drum axis of rotation to the desired Carding distance must be observed. For this purpose, the sliding guides are known as Flexbows formed, which means in three different places in the US patent Adjusting rods are attached to the side frame of the card frame. By Adjustment of the threaded rod with left-hand and right-hand thread Adjustment rods can be the three points at which the adjustment rods on the flex bend attack, each radially opposite the card frame and therefore the drum axis be adjusted, whereby it should be understood that the radial adjustment on three points circumferentially distributed the curvature of the flexbends, i.e. the Slideways, is changed slightly, i.e. the flex bends are bent.

After setting the carding distance along the sliding guides, the card can be in Be put into operation. Over time, the tips of the Lid sets and the drum set, so that the carding distance in undesirably enlarged. By this increase in the carding distance to counteract, can also with the old US patent 528007 all Adjustment rods can be adjusted together to the carding distance to the original attributed value.

For this purpose, the adjustment rods are turned away from the flex bend Ends not directly attached to the side frames of the card frame, but on respective arms of angle levers that are rotatable on the side frame of the Card frame are mounted. The other arms of the respective angle levers are connected to each other and with an adjusting wheel via respective connecting rods, so that a common adjustment of the angle lever and thus over the adjustment rods of the respective points of attack of the adjustment rods to the Flex bends are made.

From this you can see that the basic setting by the adjustment rods for everyone Support point of the flexbow is possible independently of the other support points and that afterwards a common adjustment of all support points of the flexbow can be made so that the carding gaps evenly along the Flexbows are adjusted, whereby, as already mentioned, the flexbows for adjustment be slightly bent to the changed curvature.

A change in the setting of the flex arches is not only when the Lid sets or drum sets required, but also after Grinding the drum set or the cover sets.

It is namely known to mount a grinding device on a card and after Interruption of carding work, during the life of the clothing for example, grind twice or three times to remove both the clothing tips Drum set as well as the flat bar sets to give a sharp shape ensures a better quality of carding work.

It is also from various patents, for example EP-A-0 565 486 known to install a grinding device in a card, which is much more common and the card is used during production to ensure that the respective sets remain sharp. This latter possibility has the great advantage that the card is not stopped for grinding the drum and cover sets must be so that the production is not affected. Beyond that ensures that the trimmings always have optimal sharpness and thus always produces a card sliver with uniform and high-quality properties becomes what benefits the subsequent yarn production. Furthermore introduces such grinding system that the sets have a longer life overall exhibit.

Regardless of whether the trimmings are used only a few times during their lifespan greater material removal or more often with less material removal such grinding operations lead to changes in the Carding distance, the possibility of radial adjustment of the flex bends it allows you to always set the carding distance correctly.

Various other suggestions have been made on how to make a radial adjustment who can reach flex arches.

For example, a card was offered by the company SACM in about 1975 adjusting the lids on each side of the machine from a single point by means of two mutually adjacent and mutually displaceable spirals.

With this construction, the outer spiral has the shape on each side of the card an elongated, curved wedge with a small wedge angle, the radial outer surface forms the sliding guide and its radially inner surface on the radial outer surface of the respective inner spiral slides. The inner spirals also show each have the shape of an elongated, curved wedge, but are also open the radially inner side provided with teeth and can thus by means of a Gear pair are rotated about the axis of the drum, so that by the Cooperation of the radially outer surface of the inner spiral with the respective one radially inner surfaces of the outer spirals which slide guides on both sides of the Card can be adjusted at the same time. This allows all lids simultaneously approach the drum of the card or be removed from it. Also it was known with this arrangement, the drum opposite the axis of the curved sliding guide easy to move to "entry" to the lid chain procure, i.e. the carding distance in the area where the flat bars on Approach the beginning of the carding path of the drum, set slightly larger than on End of the carding path when you leave the drum to connect to the To be returned at the beginning of the carding path.

The same proposal was also made new in DE 196 51 894 A1.

DE 29 48 825 A1 is also related to the adjustment of the flex arches a card of great interest. There it is recognized that the carding distance may change in operation, both due to strains caused by Centrifugal forces are caused as well as due to thermal expansion, which occurs at Warm up or cool down the card.

Such strains, i.e. due to centrifugal force or thermal causes, as in DE-A 29 48 825 explains in more detail, especially when commissioning or switching off the Carding problematic. As explained there, the trend tends to increase Production rate of cards on the one hand causes the speed of the Processing elements is increased and on the other hand that the dimensions of the Machine cylinders get bigger, both the diameter and the Working width. Due to the increased speeds and the enlarged dimensions an undesirable deformation of the cylinders, i.e. their caused by centrifugal force Bulging, which gradually increases.

It also explains that another, with the increase in production rate and thus the card work directly related influence in the tendency to is to see the air exchange between the cylinders and the environment Prevention of dust emissions to a large extent, thereby reducing the natural cooling of the working elements is difficult.

DE-A 29 48 825 expresses that the temperature of the participating cylinders increases over the course of time until one Equilibrium temperature is reached, this increase in temperature a Changing the dimensions of the cylinders and in particular an enlargement of the Diameter of the drum causes. Both the influence of centrifugal force and the Influence of the temperature rise do not have an immediate effect when the Machine off, but only after a certain time delay, which is what the Influence of centrifugal force affects at least as long as the acceleration time of the involved elements, e.g. of the drum, is.

The influence of temperature rise until an equilibrium temperature is reached experience has shown that it lasts for much longer operating periods, which last several Hours.

In order to remedy this, DE-A 29 48 825 describes a control method of the employment relationships between two people who are equipped with a high-end set Working elements, such as the drum and the traveling cover one Revolving flat card, described in which one with the dimensions of the drum in a directly related variable is recorded continuously or over time and the carding distance by a suitable control depending on the recorded size is kept at a certain value.

In the concrete solution shown there, the adjustment of the flex arches, i.e. of the slide guides, heated metal rods used, either by means of a a heat supply device for heatable fluids or an electric heater warmed up and therefore caused to expand thermally. Since the Temperature control a relatively precise adjustment of the lengths of each Allows metal rods, the device described there can be high Work accuracy.

Various other suggestions are also known for the radial adjustment of the Flex arches of a card. For example, US Pat. No. 5,625,924 shows a card various options for radial adjustment of the sliding guide, among others this document describes the use of controllable actuators that are extra are controlled to periodically readjust the work elements and the Change of the carding gap due to the wear of the sets or after a Compensate grinding process. It is expressed that the controllable Actuator used in connection with a built-in grinding system and can be controlled. There are different versions of the actuator specified. For example, the use of servo motors or Piezoelectric translators mentioned for performing the adjustment. It will also shown how an eccentric assembly from a controllable Drive mechanism can be used to perform a sensitive adjustment.

For the rest, from WO 93/07314 an adjustment system is known, with several Adjustment devices arranged at respective locations along the sliding guide which extend between the sliding guide and a fixed reference point, wherein each adjustment device also has a locking mode in which a adjustable clamping device is effective for setting once achieved Maintain clamping.

Despite the large number of suggestions already made, these are difficult in practice and complex to implement or expensive to manufacture.

The extent of the adjustment movements at the individual adjustment points of the Flexbow is namely relatively small, with an overall adjustment of more than three to four millimeters is rarely required, and adjustment in increments of approximately 0.01 mm is aimed for. Because of such small steps is easy realize that even small margins in mechanical joints and the like question the accuracy of the adjustment. Also adjustment devices that with thermal expansions require a certain amount Control effort and can be affected by dead play, especially the Setting one movement radially outwards and one movement radially outwards inside requires. The problem arises that temperature measurements are indirect in themselves Measurements are and direct measurements of the carding distance so far as relative have proven inaccurate.

Even with adjustable wedge systems, the manufacturing costs are relatively high, especially narrow tolerances over a wide range must be observed.

The applicant also found that the materials used for the Slideway often have a hysteresis, so that the paths when delivering and Put away are not the same and the accuracy of the adjustment also from this Reason suffers. In some constructions, the frictional forces that occur are so large that the restoring forces due to the tension of the flexbow arise, are too small to precisely ensure a proper provision.

With some materials, plasticity occurs even at low tensions Deformation, which also leads to an inaccuracy of the adjustment. Also the Preloads that can be used when processing the flexbend have a disruptive effect on the accuracy of the setting.

If there are windows in the flex bend that are useful for setting the lid, can the constant course of the carding gap in an undesirable manner to disturb.

a) zum Neueinstellen des Kardierspaltes bei der Herstellung der Karde oder nach einem erneuten Garnieren der Karde, wobei eine jeweilige radiale Verstellung im Bereich von etwa 2 mm an den verschiedenen Verstellpunkten üblich ist, um den Kardierabstand entlang der Gleitführung an allen Punkten einstellen zu können,

b) um eine radiale Verstellung der Gleitführungen zu bewirken, um Abnutzungserscheinungen der Garnituren entgegenzuwirken und den Kardierabstand konstant zu halten, wobei hier eine gleichmässige Verstellung an den jeweiligen Verstellpunkten gewünscht ist, da von einer gleichmässigen Abnutzung auszugehen ist und der einmal richtig eingestellte Kardierabstand nur gleichmässig nachgestellt werden muss,

c) um eine radiale Verstellung der Gleitführungen herbeizuführen, um die Änderung des Kardierabstandes nach dem Schleifen der Garnituren entgegenzuwirken, wobei auch hier nur eine gleichmässige Nachstellung erforderlich ist,

d) um eine radiale Verstellung der Flexbögen vorzunehmen, um die Änderung des Kardierabstandes aufgrund von Fliehkraft bzw. thermischen Dehnungen entgegenzuwirken, wobei auch diese Einstellung als gleichmässige Einstellung zu verstehen ist.

It is therefore known to radially adjust the flex bends or slide guides for the flat bars of a card for various reasons, namely:

a) for re-adjusting the carding gap during the production of the card or after re-garnishing the card, a respective radial adjustment in the range of approximately 2 mm at the various adjustment points being customary in order to be able to set the carding distance along the sliding guide at all points,

b) to bring about a radial adjustment of the sliding guides, to counteract wear and tear of the clothing and to keep the carding distance constant, here a uniform adjustment at the respective adjustment points is desired, since uniform wear can be assumed and the carding distance that has been set correctly is only uniform has to be adjusted

c) in order to bring about a radial adjustment of the sliding guides in order to counteract the change in the carding distance after grinding the sets, again only uniform adjustment being necessary here,

d) to carry out a radial adjustment of the flex bends in order to counteract the change in the carding distance due to centrifugal force or thermal expansions, this setting also being understood as a uniform setting.

The adjustment range for all uniform settings (according to b), c) and d)) is usually in the range of 0.2 to 0.3 mm.

In the case of all previous proposals, the Slideways to achieve the required adjustment of the carding gap, see above that the sliding guide is to be regarded as a flexible part, even if it is partially a has very high rigidity.

In order to effect the adjustment, the individual adjustment devices are opened supported comparatively rigid constructions, such as the side frames of the Card frame or on so-called fixed sheets, which in principle also form part of the Form the side frame of the card frame.

The object of the present invention is to provide an apparatus and a method of to provide the type mentioned, which does not or only under the disadvantages mentioned suffers to a lesser extent, a significant simplification in the area of Slideways bring and thereby significant cost savings in manufacturing and ensures the operation of the card, with an exact setting of the Carding gap over the effective range of the overall adjustment should still be possible.

To achieve this object, the invention provides that the Parts forming slide guides are supported at several discrete support points and displaceable relative to the support points around the axis of rotation of the drum are arranged, whereby the sliding surfaces of the sliding guides in the radial direction Adjusting the working gap are movable.

A first concrete way of changing the location of the Realizing parts forming sliding guides consists in each of them as one form elongated, curved wedge and the support points by firmly arranged Realize support lugs.

Thus, similar to the SACM proposal from 1975, the Slideways designed as elongated, curved wedges or spiral, however is on the second wedge cooperating with the wedge-shaped part or the the corresponding spiral is dispensed with in a cost-saving manner. Instead, be on appropriate Support points fixed support lugs are provided. If the as elongated, curved wedge formed sliding guide around the axis of rotation of the drum and is moved relative to the support lugs, so the sliding surface of the sliding guide shifted in the radial direction, making a fine adjustment according to the above points b) to d) mentioned is possible.

Even if the support lugs are fixed, they can be used to ensure a rough setting or a new setting according to point a) initially arranged displaceably in the radial direction relative to the side frame of the card and after performing the rough adjustment, for example by tightening appropriate clamping screws are clamped, then they are for the further operation of the card can no longer be adjusted unless a new one Rough adjustment due to re-garnishing or replacement of the drum or the revolving cover is required. Because a certain rough adjustment anyway must be present and one by means of the invention on two elongated, wedge-shaped and can therefore dispense with relatively expensive parts, the invention is a significant Simplification and cost savings achieved without sacrificing the accuracy of the Attitudes suffers.

The displacement of the elongated, curved wedge around the axis of rotation of the drum around, as with all of the examples below, a corresponding Provide movement, many things can be realized. For example, at one end each elongated, curved part has a controllable piston-in-cylinder arrangement be attached, the piston rod to achieve the required setting can be extended or retracted. Such a piston-in-cylinder arrangement can can also be replaced by a rotating spindle and spindle nut drive, whereby either the spindle or the nut can be driven by a stepper motor to bring about the necessary adjustment. Also can be used to implement the Displacement of the elongated curved wedges a tooth segment on the elongated, curved wedge and be fastened with one, by a stepper motor Comb the driven pinion.

Instead of realizing the support points with fixed support lugs, you can the support points are also formed by stationary, but rotatably arranged rollers be rotatable about respective axes of rotation that are parallel to the axis of rotation of the Extend drum. Such roles, which are available inexpensively in the form of ball bearings have the great advantage that an exact adjustment with proportionally small forces can be achieved because the rollers, for example, on the radial Roll the inner surface of the elongated, curved parts so that there are no essential parts Frictional forces have to be overcome. Even with such an arrangement, the Rollers can first be displaced in the radial direction in order to make a rough adjustment perform. For this, e.g. the stub axles on which the rollers turn are stored, radially displaceable and opposite the side frame of the card can be clamped.

Another possibility is the desired radial adjustment of the sliding surfaces of the Carrying out sliding guides consists of rotating the support points to form helical cams.

This variant offers the possibility of adjusting the respective Helical cams first bring about the desired rough adjustment and then clamp the cams in their respective rotational positions. Then the displacement of the elongated, curved parts around the axis of rotation of the drum and over the support surfaces the cam is used to make a fine adjustment according to points b), c) and d) bring about. To achieve this, the elongated, curved parts must be one Have a wedge shape so that the required radial adjustment along all points the elongated, curved parts.

When moving the elongated, curved parts around the axis of rotation of the drum around, the elongated, curved parts due to the tension of the Drive belt for the flat bars bent slightly when the support surfaces on the Support points do not lie on an arch that corresponds to the arch-like shape of the elongated, corresponds to curved parts. This can occur especially if the Support points can be adjusted to carry out a rough adjustment. Around to make sure that the elongated, curved parts still at all support points are supported, they must be sufficiently flexible that they are among the respective prevailing forces come into contact with all designated support points.

A further development of the variant with rotatable screw-shaped cams exists in equipping the sliding guides with teeth that with teeth of the Combing helical cams, causing a displacement of the sliding guides about the axis of rotation of the drum to a rotation of the helical cams about their respective axes of rotation running parallel to the axis of rotation of the drum and therefore leads to a radial displacement of the sliding surfaces of the sliding guides.

For this version it is not absolutely necessary that the elongated, curved parts are formed as wedges, but they can be constant have radial thickness, since the radial adjustment of the sliding surface due to the Rotation of the screws takes place at the support points. The arrangement can also be taken so that the radial adjustment of the sliding surfaces due to both Rotation of the screws as well due to the displacement of a wedge-shaped elongated part.

In the case of an arrangement with teeth having screws, these can be used for Carry out a rough adjustment according to point a) first in the axial direction be moved so that the teeth of the snails out of engagement with the teeth of the Slideways of the elongated parts get rotated and then engaged again with the Teeth of the elongated parts are brought so that a respective radial adjustment is possible on every helical cam. After that, the postponement of the Sliding guides form elongated parts about the axis of rotation that a common radial adjustment of the sliding surfaces of the sliding guides on all Support points takes place simultaneously.

Another possibility of bringing about the radial adjustment according to the invention is consists of designing each sliding guide so that it Support points correspond, each carrying a step-like ramp, the steps of which depend on the respective rotational position of the part about the axis of rotation of the drum with the Supporting noses forming support points work together to the radial position of the Determine sliding surfaces of the sliding guides.

In this embodiment, the rough adjustment according to point a) is thereby brought about that the part is positioned in the circumferential direction so that the suitable steps with the support points, for example with those provided there Interacting support lugs. A small adjustability of the Support lugs may still be necessary to make the rough adjustment with the desired one Accuracy, a short adjustment path is sufficient to get the necessary bring about gross adjustment.

The fine adjustment according to points b), c) and d) is then carried out Displacement of the elongated parts forming the sliding guides within one Circumferential length, which corresponds to the length of the individual steps.

In this embodiment, the support points could be rotated helical cams are formed, reducing the area of radial Adjustment (fine or coarse adjustment) can be enlarged.

This embodiment does not require a wedge-shaped configuration of the elongated, curved sliding guides, but these can be of constant radial thickness be carried out, they only need to have sufficient flexibility, as above indicated. If the elongated, curved parts are designed as wedges, so can the individual step surfaces of the stepped ramps parts of form circular cylindrical surfaces with a center on the axis of rotation of the drum, since the radial adjustment is then due to the wedge shape of the elongated, curved parts is achieved.

If the sliding guides are designed with a constant radial thickness, can the step surfaces of the step-shaped ramps to the peripheral surface of the Be inclined so that the inclined shape of the step surfaces for the necessary radial adjustment ensures. A mixed solution is also possible, of course of both a wedge-shaped design of the elongated, curved parts and one inclined position of the step ramps is provided, whereby a pronounced radial Adjustment with a relatively small circumferential movement is possible.

Rotatable support members can also be provided at the support points at least two each, each a different radial distance from the Have support surfaces having the axis of rotation of the respective spacer. By Rotation of the respective support members can gradually radially support the support surfaces be adjusted in order to achieve at least a rough adjustment according to point a). If the axes of rotation of the support members then in a small radial range can be made adjustable, the rough adjustment according to point a) with the desired accuracy. Then the fine radial adjustment is carried out Adjustment of the wedge-shaped elongated, curved sliding guides brought about here.

Another option is to use support members, each at least have two support surfaces, each of which is designed as a curved ramp, wherein the support surfaces merge into each other via respective radial steps.

In this embodiment, the support members for performing the rough Adjustment according to point a) so that the ramp attached in each case the support function takes over and they can then be rotated further or turned back to carry out the rough adjustment according to point a). After that the fine adjustment according to point b) to c) by moving the wedge-shaped elongated, curved sliding guides. Also in this embodiment there is the possibility of the elongated, curved parts with a constant radial Form thickness and the joint rotation of the individual support members Carry out fine adjustment according to point a), b) and c).

Another possibility according to the invention of the radial adjustment of the sliding surfaces To create the sliding guides is that each is a sliding guide forming part as two separate following each other around the axis of rotation of the drum Sections are formed, each at their mutually facing ends are pivotally hinged to a common radially adjustable support and around their respective other distal ends via respective radial adjustable supports are supported.

In other words, the elongated parts that form the sliding guides are each realized in two parts. This makes it possible to separate the lid outlet side from the Lid inlet side to adjust, the adjustment here only by radial Adjustments are made at the respective support points. By dividing the Elongated parts succeed through different radial adjustments on the Adjustment points a good adaptation to the desired cylindrical sliding surfaces reach without having to bend the curved parts.

The common radial adjustment in the middle ensures that none Steps occur in the sliding surface. In order to remedy this further, According to the invention, it is preferably provided that the two separate sections each part overlap in the area of their ends facing each other or mesh.

Another variant according to the invention consists in forming the sliding guides to equip elongated, curved parts with a heating device that the Part can warm up over the entire length, and the elongated part on both Tension ends and this by the occurring due to thermal expansion Deflection change in length and thus the radial position of the sliding surface to change the respective sliding guides. It is particularly cheap with this Embodiment when the ends of the respective parts by respective radial adjustable supports are held, since then a radial adjustment both in the middle as well as at the ends.

A particularly pronounced deflection of the elongated parts can be carried out if they are designed as an elongated bimetal strip.
In such an embodiment, it is particularly favorable if the parts forming the slide guides are each designed as a continuous double wedge and have a greater radial depth in the central longitudinal region than in the respective end regions which are at a distance from one another. In this way it can be ensured that the radial adjustment along each sliding guide remains at least essentially constant. However, it would also be possible to provide the elongated, curved parts with a constant radial dimension over their entire length, as long as the radial adjustment of individual points along the surface of the elongated parts takes place within acceptable limits.
Preferred embodiments of the invention including the method can be found in the patent claims.

Fig. 1

eine schematische Darstellung einer herkömmlichen Karde,

Fig. 2

eine Seitenansicht der Karde der Fig. 1 im Bereich des Wanderdeckels zur näheren Erläuterung der Grundkonstruktion,

Fig. 3

einen schematischen Querschnitt im Bereich des Wanderdeckels einer Karde an der Schnittebene III-III der Fig. 2 gesehen, wobei die Darstellungen der Figuren 1, 2 und 3 in unterschiedlichen Massstäben gezeigt sind,

Fig. 4

eine schematische Seitenansicht einer Gleitführung für eine Karde mit einem darauf gleitenden Deckelkopf, der nach der EP-A-0 753 610 ausgebildet ist,

Fig. 5

eine schematische Seitenansicht einer verstellbaren Gleitführung für eine Karde,

Fig. 6

eine Darstellung ähnlich der Fig. 5, jedoch von einer weiteren erfindungsgemässen Ausführungsform,

Fig. 7

eine weitere Darstellung ähnlich der Figur 5 von einer weiteren Ausführungsform einer erfindungsgemässen Gleitführung für eine Karde,

Fig. 8A

eine Darstellung ähnlich der Fig. 5, jedoch an einer unterschiedlichen erfindungsgemässen Ausführungsform einer Gleitführung für eine Karde,

Fig. 8B

eine vergrösserte Darstellung eines der Abstützglieder der Darstellung gemäss Fig. 8A

Fig. 9A

eine Darstellung ähnlich der Fig. 8A, jedoch mit einer schneckenförmigen Ausbildung der Abstützglieder,

Fig. 9B

eine vergrösserte Darstellung der schneckenförmigen Abstützglieder der Fig. 10a

Fig. 10

eine Seitenansicht einer weiteren erfindungsgemässen Gleitführung einer Karde, die beispielsweise in Zusammenhang mit der Ausführung gemäss Fig. 7, 9 oder 11 gelangen kann,

Fig. 11

eine Darstellung ähnlich der Fig. 5, jedoch von einer noch weiteren erfindungsgemässen Ausführungsform,

Fig. 12A

eine schematische Seitenansicht einer erfindungsgemässen zweigeteilten Gleitführung für eine Karde, wobei die Fig. 12B ein Detail im Bereich der sich überlappenden Enden der zwei Teilen der Gleitführung zeigt,

Fig. 13

eine weitere schematische Seitenansicht einer erfindungsgemässen Gleitführung für eine Karde, bei der die Verstellung der Gleitfläche mittels Wärmezufuhr erreicht wird, und

Fig. 14

eine Seitenansicht einer weiteren erfindungsgemässen Ausführungsform einer Gleitführung für eine Karde, die beispielsweise in der Ausführungsform gemäss Fig. 13 verwendet werden kann.

The invention is explained in more detail below purely by way of example using exemplary embodiments with reference to the drawing which shows:

Fig. 1

a schematic representation of a conventional card,

Fig. 2

2 shows a side view of the card of FIG. 1 in the area of the revolving cover for a more detailed explanation of the basic construction,

Fig. 3

2 shows a schematic cross section in the region of the revolving cover of a card at the cutting plane III-III of FIG. 2, the representations of FIGS. 1, 2 and 3 being shown on different scales,

Fig. 4

1 shows a schematic side view of a sliding guide for a card with a cover head sliding thereon, which is designed according to EP-A-0 753 610,

Fig. 5

1 shows a schematic side view of an adjustable sliding guide for a card,

Fig. 6

5 shows a representation similar to FIG. 5, but of a further embodiment according to the invention,

Fig. 7

5 shows a further illustration similar to FIG. 5 of a further embodiment of a sliding guide according to the invention for a card,

Figure 8A

5 shows a representation similar to FIG. 5, but with a different embodiment of a sliding guide for a card,

Figure 8B

an enlarged view of one of the support members of the illustration according to FIG. 8A

Figure 9A

8A, but with a helical design of the support members,

Figure 9B

an enlarged view of the helical support members of Fig. 10a

Fig. 10

2 shows a side view of another slide guide according to the invention of a card, which can be used, for example, in connection with the embodiment according to FIGS. 7, 9 or 11,

Fig. 11

5 shows a representation similar to FIG. 5, but of yet another embodiment according to the invention,

Figure 12A

FIG. 12B shows a detail in the region of the overlapping ends of the two parts of the sliding guide, FIG.

Fig. 13

another schematic side view of a sliding guide according to the invention for a card, in which the adjustment of the sliding surface is achieved by means of heat supply, and

Fig. 14

a side view of another embodiment of a sliding guide for a card according to the invention, which can be used for example in the embodiment of FIG. 13.

The fiber material to be carded, made from natural fibers or synthetic fibers or Mixtures of the same can exist in the form of dissolved and purified Flakes fed into the hopper 12 by a breeze or lickerin 14 as Cotton pad taken over, handed over to a drum or drum 16 and parallelized by a revolving cover set 18, which via deflection rollers 20, 22, 24, 26 is driven in the opposite direction to the direction of rotation 28 of the drum 16.

Fibers from the nonwoven fabric located on the drum 16 are then removed from a Removal roller 30 removed and in a manner known per se in one different rollers existing outlet section 32 to a card sliver 34 educated. This card sliver 34 is then from a sliver 36 in one Transport can 38 stored in a cycloidal manner.

Fig. 2 and Fig. 3 show the card of Fig. 1 in the area of the revolving cover set in on a larger scale and in more detail. For illustration purposes only individual flat bars 40 are shown, all of which are designed as a hollow profile Support body 42, which carries the cover set 44, and two end heads 46, which on respective ends of the hollow profile-like support body are attached, for example, that they are inserted into the ends of the hollow profile and by a crushing process that is described in detail in EP-A-627 507, positively with the hollow profile get connected.

The specific preferred embodiment of the lid heads 46 and the one driving them Drive belt 48 is described in EP-A-753 610, the belt 4 of this document can be formed in particular. This training is also in FIG. 4 of the present application in further detail in a schematic, shown in perspective.

The belt 48 is on one side, namely on the inner side in Fig. 2, with teeth 48A equipped with teeth 48B on the toothed disks or gears 20 and 26 engage, only a few teeth 48A and 48B for the sake of illustration are shown, however, it should be understood that the entire inside of the belt 48 includes Teeth 48A and the entire circumference of the gears 20 and 26 with corresponding Teeth 48B is provided. On the outside of the belt 48 there are further beam-like teeth or beams 49, which are arranged in pairs, also here for the sake of clarity only individual pairs 49 are shown and each tooth pair 49 in a corresponding recess or cavity 41 of a respective lid head intervenes as described in EP-A-0 753 610.

It can be seen from Fig. 2 that the endless drive belts, only one of which is on the One side of the card is shown here, the flat bars 40 from an entry point 50 on the right side of the drawing via a carding path along a sliding guide 52, which comprises a flex bend 54, to a discharge point 56 and that the Flat bars 40 then around the drive the drive belt shown Gear 20 deflected and returned to the inlet point 50, wherein the drive belt immediately in front of the entry point 50 around the further gear wheel 26 is deflected and between the two gears 20, 26 by two others Support wheels 22, 24 and a support 58 are supported.

It is understood that an arrangement as shown in Fig. 2 is also on the other Side of the card in a manner known per se, the driven Gears 20 through a common shaft 60 from a corresponding, only schematically illustrated motor 61 are driven with controller 63, whereby the two gears 20 and therefore the two timing belts 48 with the attached to it Tooth pairs 49 attached flat bars 40 rotate synchronously, so that the longitudinal axes the flat bars 40 are always parallel to the drive axis 62 of the drum 16 extend. This parallel position is always when moving with the lid chain maintained. It is also understood that in operation flat bars 40 over the entire length of the drive belt 48 are arranged evenly distributed.

As is described in more detail in EP-A-753 610, the sliding surfaces 64 of FIG Lid heads 46 in the area of the flex sheet 54 in sliding contact therewith and on the one hand because of their own weight and on the other hand because of the Belt tension, which is radially inward in the area of each lid head directed force generates. In other words, on the one hand, because of their Weight and on the other hand to the slide guide 52, i.e. to the sliding surfaces 66 of the Flexbow 54, pressed by the tension in the drive belt 48. hereby the required carding distance A (Fig. 3) between the cover sets 44 and the drum set 68 ensured. Due to the positive intervention of the Beam pairs 49 of the drive belt 48 in the corresponding openings 41 of the Cover heads and due to the synchronized rotation of the drive belt 48 on both sides of the card, the flat bars 40 are synchronized via the two Flexbows 54 moves, the longitudinal axes of the flat bars 40 always parallel to Drum axis are guided.

The positive engagement between the drive belt 48 and the cover heads 46 transmits the tensile forces of the drive belt 48 to the flat bars 40, so that these just along the carding path between the entry point 50 and the exit point 56 be moved.

A special feature of the proposal according to EP-A-753 610 is that in the area of the deflection, the bars of the pairs of bars 49 of the drive belts 48 tend to spread apart and hold the lid heads 46 so that they around the Gears 20, 26 are deflected without the risk that the Flat bars 40 are lost and without additional guides in them Areas are necessary.

However, the flat bars 40 lie loosely on the upper side of the revolving lid 18 the upper run of the drive belt; they can easily be removed from the drive belt 48 can be solved, for example, if they are particularly cleaned or replaced should be. Gravity ensures that the flat bars 40 are in this area do not undesirably separate from the drive belt 48.

As can be seen from the sectional drawing of FIG. 3, the flex arches 54 provide Slideways 52 for the card stock A between the cover sets 44 and the drum set 68 to set, for the sake of illustration only in sections 3 and 4 are shown, the sliding guides in this example with a each recessed, band-shaped guide element 70 made of plastic are equipped, which forms the sliding surface for the lid heads, as in the DE-A-39 07 396 or in EP-A-0 620 296 is described in more detail. Basically can such a recessed element or recessed sections Elements in all versions described in more detail below according to present invention to form the actual sliding surface 66 for the lid heads 46 can be used. However, such an element can also be dispensed with, especially if the cover head is provided with a sliding block or sliding block, that slides on the sliding guide, usually made of metal.

3 also shows that each slide guide 52 also has a radially inner one Support 72, which is often called a fixed arch, each radially inner Support 72 fixed to the associated side frame 74 of the card is connected or is integrally formed therewith, for example in the form of a respective casting. The side frames 74 of the card also carry the axis of rotation 62 of the drum (not shown in Fig. 3) and also form a radial guide for the Flex arches 54 (not shown).

Between each radially inner support 72 and the flex bends associated therewith 54 are - as can be seen from FIGS. 2 and 3 - five in this example in the Length-adjustable devices 76, which for example consist of an inner, with External thread provided part 78 and an outer, as a threaded sleeve with inner thread formed part 80. By rotating the inner part 78 compared to the outer part 80, the length of the respective setting device 76 can be adjusted in each case and thus a radial adjustment of the flex bend 54 in Area of the respective support point. This allows the Curvature of the respective flexible flex bends 54 to the curvature of the drum are adjusted and the radial position of the sliding surface 66 of the respective flex bends 54 be set so that the carding distance A over the entire length of the Carding path and remains constant over the entire width of the drum or - if desired - has the desired course along the carding path.

In the following description, parts that are described so far Parts correspond, identified by the same reference numerals, but around the Basic numbers 100, 200 etc. increased to make a clear decision. It it goes without saying that the previous description also applies to parts that are the same last last digits, so that this description will not be repeated got to. That means the following description focuses on the different characteristics.

5 shows a side view of a first variant of a sliding guide according to the invention 152, which is designed as an elongated curved wedge, at its right end 153 has a larger radial dimension than at its left end 155, the Sliding guide 152 has a constant wedge angle over its entire length. The Wedge 152 is supported in this example at three support points 157, all of which are fixed arranged support lugs 159 are formed, each with two clamping screws 161 are firmly screwed to the side frame of the card.

At the right end of the slide guide 152 there is an adjustment device in the form a piston-cylinder unit 163, the cylinder at one end 165 on the side wall the card is supported and the piston rod 167 at the right end 153 of the Slideway 152 is articulated. The adjusting device 163 is for shifting the Sliding guide 152 about the axis of rotation 175 of the drum in accordance with the double arrow 196 designed.

By shifting according to the double arrow 169, the radial position of the Surface of the slide guide 152 between the two indicated positions 171 and 173 can be changed.

To carry out the rough adjustment according to point a) above, the Clamping screws 161 are loosened and the support lugs 159 correspond to the Arrows 181 are moved in the radial direction. After tightening the Clamping screws 161, the card can then be put into operation and any Fine adjustments required in operation according to points b), c) and d) above by sliding the slide guide 152 in accordance with the double arrow 169 be brought about. Although here a piston-cylinder unit 163 for the adjustment is shown, this representation is only representative of several different Ways to understand. For example, the adjustment device can be act a threaded spindle and an adjusting nut driven by a stepper motor or a linear electric drive or a pneumatic one Driving means. Furthermore, a tooth segment on the Slideway 152 are attached and with the pinion of a drivable stepper motor Comb to implement the adjustment according to the double arrow 169.

The embodiment according to FIG. 6 is very similar to the embodiment according to FIG. 5, which is why the same parts are designated with corresponding reference numerals here, but here with the basic number 200 in order to distinguish it from the execution according to Fig. 5 bring about. It goes without saying that the description provided for FIG. 5 also applies to correspondingly numbered parts of FIG. 6, unless otherwise is expressly said, this convention also for others Embodiments apply in which other basic numbers are used. The Support points in the embodiment according to FIG. 6 are here by means of rotatable rollers 275 defined, which can be designed for example as ball bearings. Each roll 275 is in both directions about an axis of rotation 277 designed as a stub shaft rotatably arranged according to the double arrow 279. Each stub axle is 277 corresponding to the double arrow 281 opposite the side frame of the card radial slidably arranged to the rough adjustment according to point a) above bring about. If the rough adjustment has been carried out, the Slide guide 252 moved by displacement according to the double arrow 269 to the fine due to the wedge-shaped design of the sliding guide 252 Realize adjustment according to point a), c) and d). You can tell that the Axle stub 277 axes of rotation for the rotatable rollers 275, which are parallel to the Axis of rotation 275 of the drum.

7 are on the underside of the sliding guide 352 to the individual support points 357 respective step-like ramps 383 provided with Support members 359 having supporting lugs are supported. These support members 359 are made somewhat narrower in this embodiment than in the embodiment 5, but they are also via clamping screws 361 on the side frame Carding clamped adjustable. After carrying out a rough adjustment Change in the radial position of the support lugs 359 according to the double arrows 381 and then tightening the clamping screws 361, the sliding guide 352 to carry out a fine adjustment according to points b), c) and d) above be moved according to the double arrow 369. The three serve step-like surfaces of the step-like ramp 383 as alternative possibilities of the Position the sliding guide 352 for the rough adjustment according to point a) above. The individual areas of the steps, such as 385, lie on a cylindrical Surface concentric to the axis of rotation 375 of the drum. That means that at Shift in the direction of the double arrow alone the wedge shape of the sliding guide 352 for the required radial displacement of the surface of the wedge between the locations 371 and 373. However, it would also be possible to use the individual faces like 385 a position inclined to the peripheral surface of the drum and the Slideway 352 as a cylinder part 652 with at least substantially constant radial Realize thickness according to FIG. 10. With such an arrangement, then radial adjustment solely by means of the step-shaped ramps 363. Also one Mixed solution possible with both the step ramps 383 inclined support surfaces have and the sliding guide 352 is wedge-shaped, so that both parts for the radial displacement of the sliding surface of the sliding guide 352 upon displacement are responsible according to the double arrow 369.

Fig. 8 shows an embodiment which is in principle similar to Fig. 7, only here Support members 483 uses the rotary axes realized as respective stub axles 477 are rotatably arranged. Each support member 483 has in this Embodiment four different support surfaces 485 (see also FIG. 8B) on the over their entire length the same radial distance from the mental Have axis of rotation 489 of the support members. The support members 483 can thus Carry out the rough adjustment according to point a) about the axis of rotation 489, i.e. around the stub axle 477 can be rotated to a position where the appropriate support surface 485 is used. After that, you can carry out the rough rough Adjustment according to point a) also the stub axle 477 of the support members 483 corresponding to the double arrow 481 with respect to the axis of rotation 475 of the drum radially be moved.

Due to the wedge-shaped design of the sliding guide 452, this is done by displacement the sliding guide 452 according to the double arrow 469, the required radial Adjustment of the sliding surface of the sliding guide between positions 471 and 473. The support members 483 can either remain fixed or accordingly the double arrow 485 according to the rotatable rollers after the Embodiment according to FIG. 6 and thereby the friction forces that occur significantly reduce.

FIGS. 9A and 9B show an embodiment that is similar in principle, but only arrive here support members 583 for use, which are in the form of stepped, helical cams available.

Here too, the appropriate adjustment can be made for the rough adjustment according to point a) Support surface 585 can be selected, in addition, the ramp-like shape of the individual support surfaces 585 makes it possible by rotating the respective Support members 583 within the angular range of a support surface 585 (approx 90 ° in the present illustration), this rough setting according to point a) very much to bring about exactly. Thereafter, the support members 583 are in their respective Rotational positions clamped and the fine adjustment according to points b), c) and d) The sliding guide 552 is moved in accordance with the double arrow 569. For this purpose, the sliding guide 552 also has the shape of a elongated wedge on, so that by moving according to the double arrow 569 the radial outer surface of the sliding guide 552 between the areas 571 and 573 can be moved.

Alternatively, the slide guide 652 according to FIG. 10 can be used. If this takes place, the linear adjustment device 563 is dispensed with and respective rotations of the helical cams 583 corresponding to the Double arrow 587 used to fine-tune according to items b), c) and d) bring about.

In the embodiment according to FIG. 11, there are also helical cams as support members 783 for use, which also here around respective stub axles 777 are rotatably arranged. Here, the surface of each is helical Cam 783 provided with teeth 789, which in Fig. 11 only over a short range of Cam surface of the helical cams are shown, however, in practice preferably over the entire cam surface of the helical cams are provided. These teeth 789 mesh with corresponding ones on the radially inner one Side of the sliding guide 752 provided teeth 791, there only in sections are provided, but, if desired, be present over the entire length can.

By moving the sliding guide 752 in accordance with the double arrow 769 the adjusting device 763 takes place due to the positive intermeshing engagement between teeth 791 of sliding guide 752 and teeth 789 of helical cams 783, a rotation of the helical cams around an axis of rotation defined by the stub shaft 777 corresponding to the double arrow 787 with the result that the outer surface of the sliding guide 752 between the radial positions 771 and 773 is adjusted.

In the embodiment according to FIG. 11, the sliding guide 752 is in the form of a wedge Slideway shown, but it can also correspond to the sliding guide 652 Fig. 10 are formed if they have the required teeth, as here 791 is shown.

To carry out the rough adjustment, the arrangement is preferably such that the helical support members 783 can be moved in the axial direction of the stub axle 777 until the teeth 789 are no longer in meshing engagement with the flex bend 752.
The worm-shaped support members can then be rotated about the axis of rotation of the stub shaft 777 and brought back into engagement with the teeth 791 of the sliding guide 752 by axial displacement. As a result, the rough adjustment according to point a) is carried out. The fine adjustment according to points b), c) and d) is then carried out by moving the sliding guide 752 according to the double arrow 769, which leads to a rotation of the support members according to the double arrows 789.

In the embodiment of FIGS. 12A and 12B, each slide guide 852 becomes two separate sections 852a and 9 following one another about the axis of rotation of the drum 852b formed, each at their mutually facing ends 853a and 853b pivotable on a common radially adjustable support 893 at 895 are articulated. Sections 852a and 852b are at their respective other distal ends 855a and 855b via respective radially adjustable Outriggers 897a and 897b supported. The two separate sections 852a and 852b are in the region of their mutually facing ends 853a and 853b formed overlapping or interlocking.

The arrangement can be such that at least one for each section additional, radially adjustable support is provided (not shown), but between the common support 893 and that at the end of a respective section 852a and 852b located support 897a and 897b is provided.

With this arrangement, the working gap at the lid inlet can be different Working gap can be set at the card's lid outlet. The overlapping Arrangement in the area of the two ends 853a and 853b together with the one there common support 893 and the common adjustment option ensures that a smooth transition from section 852b to section 852a always takes place.

In a further alternative embodiment according to FIG. 13, these are the Sliding guides 952 forming elongated, curved parts each with a Heating device 999 equipped to heat the part over the entire length can. Each elongated part is clamped at both ends and bends due to the change in length due to thermal expansion, whereby the radial position of the sliding surface of the respective sliding guides 952 depending on the Heat supply is changeable. The heat input is determined by the controller 1001 which is equipped with a temperature sensor 1003 to determine when the sliding guide the desired temperature and therefore the desired degree of Deflection has reached. If necessary, the controller 1001 can be used as a regulation be formed.

Instead of the ends 953 and 955 of the sliding guide on fixed supports they can be supported by respective radially adjustable supports such as 959 being held. By radial displacement of the supports 959 in accordance with the Double arrow 981 while heating the sliding guide 952 can this Accept the desired radial position. The middle support 959 'only serves here the determination of the starting position of the sliding guide 952, but is also displaceable according to the double arrow 981.

Each part 952 can, if desired, be formed as an elongated bimetal strip which results in a pronounced bend at lower temperatures of the sliding guides is achievable.

In this embodiment, the parts forming the slide guides 952 can each are formed as a continuous double wedge, as shown in FIG. 14 at 952 ', i.e. so that the sliding guide has a greater radial depth in the central longitudinal region has than in the respective end regions distant from each other. This training ensures that the sliding guides when bending due to the generation of heat Experience uniform radial adjustment over its entire length. Alternatively the parts forming the sliding guides can each have a constant radial dimension over their entire length, as shown at 652 in FIG. 10.

Claims (28)

Device for adjusting the working gap (A) between the tips of the cover sets (44) and the tips of the drum set (68) of a card, the cover rods (40) provided with sets (44) covering a partial area of the drum circumference on both sides of the card ( 10) on respective convexly curved sliding surfaces having sliding guides (152; 252, 352; 452; 552; 652; 752) are guided, the flat bars having sliding heads having sliding surfaces (46) which slide along the sliding guides, the sliding guides each by a curved one Are formed and the radial position of the sliding surfaces of the sliding guides in relation to the axis of rotation of the drum (175; 275; 375; 475; 575; 675; 775) can be changed by changing the position of the parts,
characterized in that the parts forming the slide guides (152; 252, 352; 452; 552; 652; 752) are each supported at a plurality of discrete support points (157; 257; 357; 457; 557; 757) and opposite the support points about the axis of rotation of the drum (175; 275; 375; 475; 575; 675; 775) are slidably arranged, whereby the sliding surfaces of the slide guides can be moved in the radial direction for setting the working gap (A) (between 171 and 173; 271 and 273; 371 and 373; 471 and 473; 571 and 573; 771 and 773). Device according to claim 1,
characterized in that the parts forming the slide guides (152) are each formed as an elongated, curved wedge and in that the support points (157) are formed by fixedly arranged support lugs (159). Device according to claim 1,
characterized in that the parts forming the slide guides (252) are each formed as an elongated, curved wedge and in that the support points are formed by stationary, but rotatably arranged rollers (273) which are rotatable about respective axes of rotation (277) which are parallel to the Extend the axis of rotation (275) of the drum. Device according to claim 1,
characterized in that the support points (557; 757) are formed by rotatable screw-shaped cams (583; 783). Device according to claim 4,
characterized in that the parts forming the sliding guides (552; 752) are each formed as an elongated, curved wedge. Device according to claim 4,
characterized in that the parts forming the sliding guides (652) each have a constant radial dimension over their entire length. Device according to claim 4, 5 or 6,
characterized in that the slide guides (752) are equipped with teeth (791) which mesh with teeth (789) of the helical cams (783), whereby a displacement (769) of the slide guides (752) about the axis of rotation of the drum (775) leads to a rotation of the helical cams around their respective axes of rotation (777) running parallel to the axis of rotation of the drum (775) and therefore to a radial displacement of the sliding surfaces of the sliding guides (752). Device according to claim 1,
characterized in that the parts forming the sliding guides (352) each carry a step-like ramp (383) at points corresponding to the support points (357), the steps (385) of which depend on the respective rotational position of the part about the axis of rotation (375) of the drum interact with the support lugs (359) forming the support points (357) in order to determine the radial position of the sliding surfaces of the slide guides (between 371 and 373. Device according to claim 8,
characterized in that the parts forming the sliding guides each have a constant radial dimension over their entire length. Device according to claim 9,
characterized in that the support points are formed by rotatable screw-shaped cams. Device according to claim 8 or 9,
characterized in that the surfaces of the steps (385) are inclined to the peripheral surface of the drum. Device according to claim 1,
characterized in that rotatable support members (483) are provided at the support points (457), each support member having at least two (485) support surfaces each having a different radial distance from the axis of rotation (489) of the respective support member (483). Device according to claim 12,
characterized in that each slide guide (452) is designed as an elongated, curved wedge. Device according to claim 13
characterized in that each sliding guide has a constant radial dimension over its entire length. Device according to claim 1,
characterized in that rotatable support members (583) are provided at the support points (557), each support member having at least two support surfaces (585), each of which is designed as a curved ramp, the support surfaces (585) via respective radial steps (ΔR) merge. Device according to claim 14 or 15,
characterized in that one or more devices are provided to enable the rotatable support members (483; 583) to be rotated into the respective desired rotational positions. Device according to one of the preceding claims,
characterized in that means (163; 263; 363; 463; 563; 763) are provided for displacing the parts forming the sliding guides about the axis of rotation of the drum. Device according to one of the preceding claims,
characterized in that from three to twenty preferably three to six support points (157; 257; 357; 457; 557; 757) are provided for each sliding guide (152; 252; 352; 452; 552; 752). Device for adjusting the working gap (A) between the tips of the cover sets (44) and the tips of the drum set (68) of a card, the flat bars (40) provided with sets (44) covering a portion of the drum circumference on both sides of the card ( 10) on respective convexly curved sliding surfaces having sliding guides (152; 252, 352; 452; 552; 652; 752) are guided, the flat bars having sliding heads having sliding surfaces (46) which slide along the sliding guides, the sliding guides each by a curved one Are formed and the radial position of the sliding surfaces of the sliding guides in relation to the axis of rotation of the drum (175; 275; 375; 475; 575; 675; 775) can be changed by changing the position of the parts,
characterized in that each part forming a sliding guide is designed as two separate sections which follow one another around the axis of rotation of the drum and which are each pivotably articulated on their mutually facing ends to a common radially adjustable support and about their respective other distal ends via respective ones radially adjustable supports are supported. Device according to claim 19,
characterized in that the two separate sections of each part overlap or interlock in the region of their mutually facing ends. Device according to claim 19 or 20,
characterized in that for each section at least one further radially adjustable support is provided, which is provided between the common support and the support located at the end of each section. Device for adjusting the working gap (A) between the tips of the cover sets (44) and the tips of the drum set (68) of a card, the flat bars (40) provided with sets (44) covering a portion of the drum circumference on both sides of the card ( 10) on respective convexly curved sliding surfaces having sliding guides (152; 252, 352; 452; 552; 652; 752) are guided, the flat bars having sliding heads having sliding surfaces (46) which slide along the sliding guides, the sliding guides each by a curved one Are formed and the radial position of the sliding surfaces of the sliding guides in relation to the axis of rotation of the drum (175; 275; 375; 475; 575; 675; 775) can be changed by changing the position of the parts,
characterized in that the elongated, curved parts forming the sliding guides (952) are each equipped with a heating device (999) which is able to heat the part over the entire length, that each elongated part is clamped at both ends (953,955) and by the change in length occurring due to thermal expansion deflects, and thus the radial position of the sliding surface of the respective sliding guides can be changed. Device according to claim 22,
characterized in that the ends (953, 955) of the respective parts (952) are held by respective radially adjustable supports. Device according to claim 22 or 23,
characterized in that each part is designed as an elongated bimetal strip. Device according to claim 22, 23 or 24,
characterized in that the parts (952 ') forming the sliding guides are each designed as a continuous double wedge and have a greater radial depth in the central longitudinal region than in the respective end regions which are at a distance from one another. Device according to claim 22, 23 or 24,
characterized in that the parts forming the slide guides (952) each have a constant radial dimension over their entire length. Method for adjusting the working gap (A) between the tips of the cover sets (44) and the tips of the drum set (68) of a card, the flat bars (40) provided with sets (44) covering a partial area of the drum circumference on both sides of the card ( 10) on respective convexly curved sliding surfaces having sliding guides (152; 252, 352; 452; 552; 652; 752) are guided, the flat bars having sliding heads having sliding surfaces (46) which slide along the sliding guides, the sliding guides each by a curved one Are formed and the radial position of the sliding surfaces of the sliding guides in relation to the axis of rotation of the drum (175; 275; 375; 475; 575; 675; 775) can be changed by changing the position of the parts,
characterized in that the parts forming the slide guides (152; 252, 352; 452; 552; 652; 752) are each supported at a plurality of discrete support points (157; 257; 357; 457; 557; 757) and opposite the support points about the axis of rotation the drum (175; 275; 375; 475; 575; 675; 775) around to move the sliding surfaces of the sliding guides in the radial direction to adjust the working gap. The method of claim 27
characterized in that the support members (159; 273; 359; 483; 583; 783) provided at the support points (157; 257; 357; 457; 557; 757) are set to carry out a readjustment and the displacement (169; 269; 369 ; 469; 569; 769) of the slide guides (152; 252, 352; 452; 552; 652; 752) around the axis of rotation of the drum (175; 275; 375; 475; 575; 675; 775) for performing a fine adjustment with a uniform radial adjustment of the sliding surfaces of the sliding guides is made.

Images