Device and method for adjusting at least one flexible sheet concentrically with respect to a rotatably mounted clothed drum of a carding machine

Abstract

The present invention relates to a device and a method for adjusting at least one flexible bend (27) concentrically with respect to a rotatably mounted clothed drum (4) of a carding machine, wherein at least one flexible bend (27) for guiding a plurality of revolving card-flat bars (14) of a revolving flat system (17) either side of the drum (4) is in each case adjustably arranged directly or indirectly on a respective side shield (16) by means of a plurality of adjustment points, wherein a means is provided by means of which at least one point of contact can be established between the card clothing (14a) of the card-flat bar (14) and the card clothing (4a) of the drum (4), such that the flexible bend (27) can be adjusted concentrically with respect to the drum (4).

Description

[0001] The invention relates to a device and a method for adjusting at least one flexible bow concentrically to a rotatably mounted garnished drum of a carding machine, wherein at least one flexible bow is arranged on both sides of the drum directly or indirectly on a respective side plate by means of a plurality of adjustment points.

[0002] The carding gap of a card is determined by the distance between the clothing of the rotating flat bars and the clothing of the drum. The flat bars each run on a guide rail or flexible bend by means of sliding elements or pins, which thus form the guideway for the flat bars opposite the drum. The guide rails can be one-piece or two-piece. Two-piece guide rails can have an upper wedge-shaped guide rail and a lower wedge-shaped guide rail. The lower guide rail can be formed integrally with the flexible bend. Since the wedge-shaped guide rails are aligned with their wedges, shifting the guide rails relative to each other results in a different height profile, which changes the distance between the upper guide rail and the drum. The guide rails can in turn be arranged on a flexible bend, which is attached directly or indirectly to both sides of the side plate of the card.The slide bars can also be arranged on the side plate of the card and can be adjusted directly. Using adjustable spindles, the concentricity and distance of the flexible bend, and thus the slide bars, from the drum can be adjusted. In the following, the term "flexible bend" also includes a slide bar that is arranged on the side plate of the card and can be adjusted directly or indirectly.

[0003] Adjusting the flexible bend concentrically to the drum is therefore the first step in setting a constant carding gap. The flexible bend is typically adjusted using distance gauges, by determining the distance at the lateral edge between the flat bar clothing and the drum clothing. This makes it impossible to reconstruct the contour or the entire course of the guideway throughout the flat circuit, as the technician always only refers to the area of a single adjusting spindle. The result of the adjustment therefore depends heavily on the technician's experience.

[0004] Alternatively, a measuring flat was developed according to DE 102014015480 A1, which is installed in the revolving flat system instead of one to three flat bars. This measuring flat rotates with the other flat bars and electronically records its distance from the drum clothing. A graphical evaluation allows the concentricity of the slide rails to the drum to be clearly displayed, allowing the flexible bend and thus the slide rails to be precisely adjusted concentrically to the drum by adjusting the spindles. The disadvantage of this measuring flat is the relatively high cost.

[0005] In the event of a collision between the drum and at least one component, such as the rotating flat bars of a carding machine, the T-CON contact and temperature control system (DE 102006002812 A1) provides automatic shutdown. Opposing components that could collide with each other are electrically insulated, and a voltage is applied to both components. If contact occurs between the components, a short circuit occurs. A digital filter in the machine control system selects and evaluates the number of contacts to prevent immediate shutdown of the carding machine. This system has previously been used to prevent clothing and machine damage. The carding gap between the carding drum and the revolving flats can be adjusted during operation, particularly in the event of temperature changes on the carding machine.

[0006] EP 2743385 B1 varies the present method in that the intensity or contact duration of each short circuit is determined and evaluated along with the number of contacts determined.

[0007] Both documents disclose the adjustment or modification of the existing carding gap after adjusting the flexible bend or slide bar, as soon as contact occurs between the cylinder clothing and a flat clothing. However, an adjustment of the flexible bend or slide bar is not disclosed with these systems.

[0008] The object of the invention is to improve the adjustment of the concentricity of the flexible bow or the sliding bar to the drum on a carding machine.

[0009] This object is achieved by a device and a method according to the preamble of claims 1 and 13 in conjunction with the characterizing features. Advantageous developments of the invention are specified in the dependent claims.

[0010] The device according to the invention for adjusting at least one flexible arch concentrically to a rotatably mounted garnished drum of a carding machine has at least one flexible arch each for guiding a plurality of rotating flat bars of a revolving flat system on both sides of the drum, wherein the flexible arches are arranged directly or indirectly on a respective side plate by means of a plurality of adjustment points.

[0011] The invention is characterized in that a means is provided with which at least one contact between the clothing of the flat bar and the clothing of the drum can be determined, so that a flexible arch can be adjusted concentrically to the drum.

[0012] The contact between the flat bar clothing and the drum clothing allows a single flexible bend or both flexible bends to be adjusted concentrically to the drum simultaneously or sequentially. A limited adjustment of the slide bar in the area of the flexible bend adjustment points can be used to create a constant distance or even contact between the flat bar clothing and the drum clothing. If the flat bars only run on one upper side of the flexible bend, the flexible bend can be aligned concentrically to the drum using the flexible bend adjustment points. The flexible bend is adjusted concentrically to the drum via the flexible bend adjustment points. The carding gap is adjusted via the slide bar or the flexible bend adjustment points.

[0013] Preferably, the means for determining the at least one contact between the clothing of the flat bar and the clothing of the drum can be designed as a resistance measuring device. The resistance measuring device can indirectly determine a constant distance by determining the electrical resistance between the clothings. The electrical resistance at the clothings is changed by adjusting the adjusting spindle.

[0014] Alternatively, the contacts between the flat bar assembly and the drum assembly can be determined using an electrical contact measurement. This involves electrically isolating the flat bar assembly and the drum assembly, applying a voltage to both components, and establishing at least one short circuit between the two components. The T-CON contact and temperature control system is used for this purpose, detecting the contacts and assigning them to a location.

[0015] In a first variant, a classic flat bar can be used to adjust the flexible bends, the clothing of which lies flat against the flat bar across the entire working width. It must be assumed that the first contact does not necessarily occur in an edge area of the drum, but can also occur in the middle area of the drum. In this case, the drum must be stationary, which is not necessarily the case with the other variants below, but can be useful due to possible collisions and clothing wear. If the first contact occurs, for example, in the middle area of the drum, the flexible bends can be adjusted on both sides in this position using an adjusting spindle until the number of contacts has expanded across the drum width or flat bar length and has reached or can be determined as far as the edge area.This process can be repeated in the area of each adjusting spindle, so that the flexible sheet is adjusted concentrically to the drum over the flat travel. The carding gap can then be adjusted by adjusting the slide bars and, for example, readjusted depending on the temperature.

[0016] In a further variant, the at least one flat bar can be designed to accommodate a spacer at least at one lateral edge region, which is designed to locally remove or space the clothing at a defined distance from the flat bar. By determining the contacts between the clothing of the flat bar and the clothing of the drum, the setting points of the flexible arch can be adjusted concentrically to the drum. Since only individual contacts occur between the clothing in the area of the setting points of the flexible arch, this method is suitable for both resistance measurement and determination by electrical contacts.

[0017] The adjustment points can be designed as manually or motor-driven adjusting spindles arranged on the side plate. The lateral edge area is the area of the flat bar where the sliding elements or pins protrude laterally from the profile of the flat bar. For a flat bar length of 100 to 130 cm, the spacer is designed so that the clothing is locally spaced or removed from the base area of the flat bar by a defined distance of approximately 1 to 5 cm at the lateral edge area, for example, 0.2 to 0.5 mm, and after this 1 to 5 cm, it rests flatly against the rest of the flat bar.

[0018] Because the teeth or tips of the clothings of the flat bar and drum only touch in the edge area, a concentric distance or radius of the flexible bend arranged on both sides of the drum can be adjusted so that the flat bar can be aligned absolutely parallel to the drum or the drum axis. The clothings are therefore not subject to wear because only the teeth or tips arranged on the sides touch briefly to make the adjustment. This means that after adjustment all the flat bars are moved parallel to the drum so that no lateral fiber fly can occur and the carding quality is consistent across the drum width. After adjusting the flexible bend the spacers are removed again or the integrated spacers are moved back to zero so that the clothing lies flat against the flat bar again.

[0019] Preferably, the clothing of the flat bar is arranged detachably at least at one lateral edge area of the flat bar. This detachable arrangement allows the use of a standard flat bar that is already in the card. For this purpose, the clothing is advantageously magnetically attached to the flat bar.

[0020] In an advantageous alternative embodiment, the clothing can be designed to be attached to the flat bar by means of segmented clamps or clips. Even with this alternative embodiment, the clothing can be locally removed or spaced apart from the flat bar at a defined distance in the edge area.

[0021] As an alternative to these two embodiments, the flat bar can be designed as a reference flat bar, in which the clothing is arranged at a lateral edge region with a varied distance from the drum, which protrudes from the plane of the remaining clothing arrangement.

[0022] Preferably, the spacer can be designed as a separate shim that can be inserted or plugged between the clothing and the flat bar. This allows the use of a flat bar located in the card, in which, for example, a feeler gauge is inserted locally in the lateral edge area.

[0023] In another embodiment, the spacer can be integrated into the flat bar. Pneumatic or hydraulic cushions can be used for this purpose, which can be activated manually or automatically only for the adjustment process. This, of course, also requires that the clothing can be removed from the flat bar, albeit to a limited extent, in the lateral edge area.

[0024] Another advantage is that the spacer can be designed as a pressure or screw element that removes the clothing from the flat bar to adjust the setting points. The pressure or screw elements can be integrated into the flat bar and limited to a defined setting dimension.

[0025] In an advantageous embodiment, two flat bars are used to adjust the flexible sheet, with the first flat bar being designed to accommodate a spacer at a lateral edge region, and the second flat bar being designed to accommodate a spacer at a lateral edge region opposite the edge region of the first flat bar. This allows the flexible sheets, which are arranged on the side plate on both sides of the drum, to be adjusted simultaneously.

[0026] Another advantage of the carding machine is its control system, which is designed to store the contact points between the flat bar clothing and the drum clothing according to the location of the contact and to display them visually. This can be done at any number of points along the guide rail. This automatically creates documentation of the carding machine's settings for the technician and the customer.

[0027] With the method according to the invention for adjusting at least one flexible arch concentrically to a rotatably mounted clothed drum of a carding machine, in which at least one flexible arch is arranged on both sides of the drum directly or indirectly on a side plate in each case by means of a plurality of adjustment points, at least one flat bar with its clothing is moved into contact with the clothing of the drum, so that at least one flexible arch can be adjusted concentrically to the drum in the area of its adjustment points.

[0028] Preferably, the contacts are determined by resistance measurement. Using an ohmmeter, the electrical resistance between the drum and flat bar fittings can be used to adjust the concentricity of the flexible bends to the drum. If the resistance changes, the distance between the components also changes. The adjusting spindle is then adjusted until the electrical resistance is the same at all adjustment points.

[0029] Alternatively, the contacts can be determined by means of an electrical short circuit, whereby at least the flat bar assemblies and the drum assembly are electrically insulated, and a voltage is applied to both components. For this purpose, the T-CON contact and temperature control system is used, which detects the contacts and assigns them to a location.

[0030] Preferably, the clothing on at least one flat bar is positioned at a defined distance from the flat bar at an edge region. This allows the adjustment points of the flexible sheet to be set concentrically to the drum by determining the contacts at the edge region of the clothing of the flat bar and the clothing of the drum.

[0031] By ensuring that the teeth or tips of the flat bar and drum clothings only touch at the edges, a concentric distance or radius of the flexible bend arranged on both sides of the drum can be adjusted so that the flat bar can be aligned absolutely parallel to the drum or drum axis. The clothings are thus not subject to wear, as only the teeth or tips arranged on the sides briefly touch to make the adjustment. This means that after adjustment, all flat bars are moved parallel to the drum, preventing lateral fiber fly and ensuring consistent carding quality across the drum width.

[0032] Preferably, the contacts are determined over a course of a partial circumference of the drum, whereby the contacts are stored in a control system and displayed visually.

[0033] Further measures improving the invention are presented in more detail below, together with the description of a preferred embodiment of the invention with reference to the figures. Although the embodiment relates to a carding machine, the components described here can also be parts of a carding machine.

[0034] They show: Figure 1 shows a schematic side view of a carding machine with the device according to the invention; Figure 2 shows a perspective view of the slide bar; Figure 3 shows a schematic view of a side plate with the slide bar and the revolving flat system; Figure 4 shows a schematic view of the drum with one of two modified flat bars; Figure 5 shows a further embodiment of the Figure 4 .

[0035] Fig. 1shows a carding machine 100 according to the prior art, in which fiber flakes are guided via a shaft to a feed roller 1, a feed table 2, via several licker-in rollers 3a, 3b, 3c, to the drum 4 or the reel tambour. On the drum 4, the fibers of the fiber flakes are parallelized and cleaned by means of stationary carding elements 20, suction hoods and separating knives and by means of rotating carding elements arranged on a revolving flat system 17, which are designed as flat bars 14. The resulting fiber web is then conveyed via a doffer 5, a doffer roller 6 and several squeeze rollers 7, 8 to a web guide element 9, which forms the fiber web with a funnel 10 into a fiber sliver, which is transferred via take-off rollers 11, 12 to a downstream processing machine or a can 15.The adjustment of the flat bars 14 to the drum 4 (carding gap) is carried out via a flexible arch or sliding strips 18 (not shown here), which have wedge-shaped elements aligned against one another.

[0036] The following description refers to the adjustment of the concentricity of the flexible bend or the slide bar 18 to the drum 4. Depending on the design of the card, the flexible bend can have a slide bar 18 with a constant cross-section, on which the flat bar 14 slides along its flat travel. Alternatively, the slide bar 18 can also consist of two wedge-shaped slide bars 18a, 18b arranged opposite one another, with the upper slide bar 18a being displaceably arranged on the lower slide bar 18b, so that the outer radius of the slide bar 18 changes with a displacement. In both variants, the slide bar 18 is arranged and fastened on the flexible bend 27 or in an upwardly open groove in the flexible bend. The lower slide bar 18b can be formed integrally with the flexible bend 27. Depending on the design of the card, the flat bars 14 can also slide along a coated upper side of the flexible bend 27.

[0037] In a first embodiment, the concentricity of the flexible bend 27 is determined using a resistance measuring device without a separate electrical voltage having to be applied to the components.

[0038] For a second embodiment, the clothing 14a with the associated flat bar 14 can be electrically conductive, but arranged in an electrically insulated manner within the card 100. For this purpose, the clothing 14a is arranged in an electrically conductive foundation for the flat bars 14 of the revolving flat system 17. The flat bars 14 are guided in an electrically insulated manner on the slide rail 18, with the electrical contact for the contact and temperature control T-CON being guided and transmitted via the clothing 14a into the foundation via the outer sliding elements or the pins into the contact and temperature control T-CON. This is not necessary for the first embodiment.

[0039] The Figures 2 and3show the principle of the slide bar 18, which can consist of an upper movable wedge-shaped slide bar 18a and a lower fixed wedge-shaped slide bar 18b. Independently of this described embodiment, a one-piece slide bar 18 can also be arranged on the flexible bend 27. The lower fixed wedge-shaped slide bar 18b is arranged in a fixed position on or in an upwardly open groove of the flexible bend 27 and is therefore not visible. In this example, the slide bar 18 for the revolving flat system 17 is shown. The flexible bend 27 is usually connected in a directly or indirectly adjustably manner to the side plate 16 of the card 100, so that each card 100 has at least one one-piece or multi-piece flexible bend 27 on both sides of the drum 4. The lower slide bar 18b can be arranged on the flexible bend 27 in a fixed position or in one piece with it.The upper slide bar 18a is slidably arranged on the lower slide bar 18b, with a gear 21a, which at least partially penetrates the lower slide bar 18b, displacing the upper slide bar 18a around its circumference. The radius of the flexible arch 27 and the slide bar 18 arranged thereon must be set concentrically to the radius of the drum 4, since the flat bars 14 are guided against the direction of rotation of the drum 4 on their flat travel and should always maintain the same distance from the drum 4 (carding gap). The revolving flats 14 slide on the upper side of the upper slide bar 18a with their sliding elements or pins 14b, which are guided and moved at a distance from one another via a belt 24. The sliding elements or pins 14b can interact with the contact arch 23 of a contact element 22, which can be arranged, for example, laterally on the slide bar 18 or on the flexible arch 27.Alternatively, the flat bar 14 can also be directly connected to a contact arch 23, for example via a sliding contact. The electrical contact during calibration thus takes place via the tips of the clothings 14a, via an electrically conductive foundation of the flat bar 14 into the pins 14b, which are electrically connected to the foundation, and into the contact arch 23. This exemplary embodiment shows the arrangement of, for example, four contact elements 22 on the slide bar 18, so that the location of the contact between the clothing 14a of a flat bar 14 and the clothing 4a of the drum 4 can be located very precisely. The contact elements 22 with their contact arches 23 are in turn electrically connected to the control system of the carding machine 100.In order to adapt the radius of the slide bar 18 concentrically to the radius of the drum 4 and / or to adjust the basic distance between the upper side of the slide bar 18 and the drum 4, the flexible arch 27 has a plurality of adjusting spindles 19 which can be adjusted manually or by motor. In this exemplary embodiment, six adjusting spindles 19 and two further adjustment points are provided at the ends of the flexible arch 27, with which the flexible arch 27 can be adjusted on each side of the card 100. As already mentioned, the adjustment of the upper slide bar 18a on the lower slide bar 18b takes place with a gear 21a which is driven by a drive 21. The drive 21 can be designed as a motor-gear combination, for example as a stepper motor with externally arranged sensors or as a servo motor with integrated sensors. By adjusting orWhen the upper slide bar 18a is displaced on the lower slide bar 18b, the wedge shape simultaneously translates the movement, in that a large distance is covered on the circumference of the lower slide bar 18b, which only causes a small change in the radius.

[0040] Figure 4shows a representation of a section of a flat bar 14 and a drum 4 with a view from the can 15 to the opened card 100. A first flat bar 14 is provided with a spacer 26 which is inserted on one side of the flat bar 14 under the clothing 14a or its foundation. For this purpose, the clothing 14a can be detached from the flat bar 14 in the area of the sliding elements or the pins 14b on the flat bar 14. Advantageously, the clothing 14a can be magnetically attached to the flat bar 14. Alternatively, on at least two flat bars, the attachment (clips, clamps) of the clothing to the flat bar 14 can be segmented in the area of the pins, so that the attachment at the edge area is detachable. Of course, two prepared flat bars can also be prepared and inserted into the revolving flat system 17 and exchanged again after the flexible arches 27 have been adjusted.In a first embodiment, the spacer 26 can be designed, for example, as a shim plate having defined dimensions, as is the case with a feeler gauge plate. The thickness of the spacer 26 can be, for example, 0.2 mm. This value is used in this example. Figure 4the clothing 14a is positioned on its left side in the illustration closer to the clothing 4a of the drum 4, so that the tips of the clothings 4a, 14a touch or almost touch at a single point. On the right side, the clothing 14a of the flat bar 14 is attached to it unchanged and thus has a distance of 0.2 mm to the clothing of the drum 4. On the left side, a precise point of contact is established by the clothing 14a of the flat bar 14 being moved into contact with the clothing 4a of the drum 4 in the area of an adjusting spindle 19. A second flat bar, which is arranged directly next to the first flat bar on the revolving flat system 17, can be provided on the right side with a spacer 26 between the clothing 14a and the flat bar 14. Since both flat bars are next to each other, they are now positioned in the area of a first adjusting spindle 19.Presumably, only one flat bar with its clothing on one side of the card will be in contact with or touching the clothing of the drum. Therefore, the adjusting spindle 19 on the side where the clothings are not touching must be adjusted. Whether there is contact can be determined using a resistance meter or the T-CON contact and temperature control. If both flat bars, with their respective "lowered" clothing, once on the left side and once on the right side, are in contact with the clothing 4a of the drum 4, it can be assumed, after removing both spacers 26, that the flat bar 14 is arranged absolutely parallel to the drum 4 and that the flexible bends 27 on both sides of the card are thus at the same distance from the drum axis. The flat bars 14 still equipped with the spacer 26 are now moved to the other five adjusting spindles 19, and the process is repeated in each case.This method allows the flexible bend 27 to be precisely adjusted on each side of the card. The use of the resistance measuring device or the T-CON contact and temperature control system enables objective determination of contact between the clothings 14a of the flat bar 14 and the clothing 4a of the drum, thus no longer relying on the subjective experience of the fitter.

[0041] In the embodiment of the Figure 5 The spacer 26 is designed as a pressure element that can be actuated hydraulically or pneumatically. The pressure element is embedded in the base area of the flat bar 14 and can be moved out of the plane of the base area such that the clothing 14a is removed at a defined distance from the flat bar 14. For this purpose, the pressure element can be controlled manually or automatically.

[0042] Alternatively, a screw is shown at the same location as a spacer 26, which can at least partially penetrate the base area of the flat bar 14 and can, for example, be arranged in the fastening for the pins 14. By screwing in the screw by a defined amount, the clothing 14a can also be removed from the flat bar 14. The screw can be prepared in such a way that only a certain number of turns are possible in order to precisely define the distance between the clothing and the flat bar. Instead of the screw, a bayonet or snap-in closure can also be installed, with which the defined distance between the clothing 14a and the flat bar 14 can be achieved with, for example, a 30° rotation. Of course, the two flat bars can also be designed as a reference flat bar and used only for the alignment process of the flexible arches.The reference flat bars are then replaced with conventional flat bars in the card.

[0043] The visual or graphic display of the contour of the flexible arch 27 is achieved by the flat bars 14, equipped with spacers 26, traveling over the entire arch of the drum 4 by means of a flat drive, and establishing contact between the clothings at any desired number of points. Recording the flat travel (contact across the arch of the drum) enables the machine control system to graphically represent the guideway (flexible arch and thus the slide rail) in relation to the drum surface. The course of the graphic thus corresponds to the contour of the flexible arch(s).

[0044] By means of the method according to the invention and the associated device, the flexible arches 27 arranged on both sides of the drum 4 on the side plates 16 can be adjusted such that the flat bars 14 are moved absolutely parallel to the drum 4 or to the drum axis.

[0045] The thing with the Figures 4 and 5The method described is based on two flat bars, each of which is moved into contact on an opposite side with an increased distance between the clothing and the flat bar only in the edge area of the drum. The method can also be implemented with a single flat bar by first moving the flat bar 14, which is supported by a spacer 26 or spacer element in the area of an end face between the clothing 14a and the flat bar 14, along one side of the flexible bend 27 on the card. After the first flexible bend 27 has been adjusted, the flat bar is rotated by 180° in the revolving flat system 17 and the second flexible bend 27 can be adjusted. These two methods for adjusting the flexible bend 27 have the advantage that one or two existing flat bars 14 of the card can be used.

[0046] In an alternative embodiment, a single flat bar 14 can be used to simultaneously adjust both flexible arches 27, in which this flat bar 14 has a divided clothing that is electrically insulated from one another. The clothing is preferably divided in the center of the flat bar 14, so that a separate electrical contact can be established on both sides of the flat bar 14 between a part of the clothing and an edge region of the drum 4. Spacers 26 or distance elements are inserted between the flat bar 14 and the clothing 14a at both end faces, so that both flexible arches 27 can be adjusted simultaneously.

[0047] With the methods described above, the flexible arches 27 can be adjusted based on a targeted contact or a resistance measurement between the clothing 14a of a flat bar 14 and an edge region of the drum clothing.

[0048] Alternatively, a single flat bar 14, the clothing 14a of which lies flat against the flat bar 14 across the entire working width and is not supported by spacers 26 in the edge area, can be used to adjust the flexible arches 27. It can be assumed that the first contact does not necessarily occur in an edge area of the drum 4, but can also occur in a central area of the drum 4. In this case, the drum 4 must be stationary, which is not necessarily the case with the other methods described above, but can be useful due to possible collisions and clothing wear. If a first contact occurs, for example, in the central area of the drum 4, the flexible arches 27 can be adjusted on both sides in this position of an adjusting spindle 19 until the number of contacts has expanded across the drum width or flat bar length and has reached or can be determined as far as the edge area.This process can be repeated in the area of each adjusting spindle 19, so that the flexible sheet 27 is adjusted concentrically to the drum 4 over the flat travel. Subsequently, the carding gap is adjusted by adjusting the slide bars 18 and, for example, readjusted depending on the temperature.

[0049] The invention is not limited in its implementation to the preferred embodiment described above. Rather, a number of variants are conceivable, which utilize the presented solution even in fundamentally different embodiments. All features and / or advantages apparent from the claims, the description, or the drawings, including structural details or spatial arrangements, may be essential to the invention both individually and in a wide variety of combinations. Reference symbol

[0050] 100 carding machines 1 Feed roller 2 Feed table 3a, 3b, 3c Licker-in 4 Drum 4a Clothing 5 Doffer 6 Doffer roller 7 Squeeze roller 8 Squeeze roller 9 Fleece guide element 10 Funnel 11 Take-off rollers 12 Take-off rollers 13 Frame 14 Flat bar 14a Clothing 14b Pin 15 Can 16 Side plate 17 Revolving flat system 18 Slide bars 18a Upper slide bar 18b Lower slide bar 19 Adjusting spindle 20 Fixed carding element 21 Drive 21a Gear 22 Contact element 23 Contact bend 24 Belt 25 Deflection wheels 26 Spacer 27 Flexible bend T-CON contact and temperature control

Claims

1. A device for adjusting at least one flexible bend (27) concentrically to a rotatably mounted clothed drum (4) of a card, wherein at least one respective flexible bend (27) for guiding a plurality of circulating flat bars (14) of a revolving card flat system (17) is by means of several adjusting points adjustably arranged on both sides of the drum (4) directly or indirectly at one respective lateral shield (16), characterized in that a means is provided with which at least one contact can be determined between the clothing (14a) of the flat bar (14) and the clothing (4a) of the drum (4), so that a flexible bend (27) is concentrically adjustable with regard to the drum (4), wherein at least one flat bar (14) is formed for accommodating a spacer (26) at least at one lateral border area, which spacer is formed for displacing the clothing (14a) away from the flat bar (14), locally limited in a defined distance, or to distance the same.

2. The device according to claim 1, characterized in that the means for determining the at least one contact between the clothing (14a) of the flat bar (14) and the clothing (4a) of the drum (4) is formed as a resistance-measuring instrument.

3. The device according to claim 1, characterized in that the means for determining the at least one contact between the clothing (14a) of the flat bar (14) and the clothing (4a) of the drum (4) is formed as an electric contact measuring, in which measurement the clothing (14a) with the flat bar (14) as well as the clothing (4a) with the drum (4) are electrically insulated and voltage is applied to both components, and at least one short-circuit can be realized via the contact of both components.

4. The device according to claim 1, characterized in that the clothing (14a) of the flat bar (14) is releasably disposed at least at one lateral border area of the flat bar (14).

5. The device according to claim 4, characterized in that the clothing (14a) is formed for fastening to the flat bar (14) magnetically or by means of segmented clamps or clips.

6. The device according to claim 2, characterized in that the spacer (26) is formed as a separate shim.

7. The device according to claim 2, characterized in that the spacer (26) is incorporated into the flat bar (14).

8. The device according to claim 5, characterized in that the spacer is formed as a pressure or screw element, which can move the clothing (14a) away from the flat bar (14) for adjusting the adjusting points.

9. The device according to any of the preceding claims, characterized in that the flat bar (14) includes a split clothing (14a), wherein the clothing parts are disposed electrically insulated from each other at the flat bar (14).

10. The device according to claim 1, characterized in that two flat bars (14) are used for adjusting the flexible bend (27), wherein the first flat bar (14) is formed for accommodating a spacer (26) at a lateral border area, and the second flat bar (14) is formed for accommodating a spacer (26) at a lateral border area, which is opposite the border area of the first flat bar (14).

11. The device according to any of the preceding claims, characterized in that the card has a control, which is formed for storing the contacts between the clothing (14a) of the flat bars (14) and the clothing (4a) of the drum (4) according to the location of the contact and for visually illustrating them.

12. A method for adjusting at least one flexible bend (27) concentrically to a rotatably mounted clothed drum (4) of a card, wherein at least one respective flexible bend (27) is disposed on both sides of the drum (4) directly or indirectly at one respective lateral shield (16) and adjustably by means of several adjusting points, characterized in that at least one flat bar (14) with the clothing (14a) thereof approaches as far as to contact the clothing (4a) of the drum (4), so that at least one flexible bend (27) is adjustable in the area of the adjusting points thereof concentrically to the drum (4).

13. The method according to claim 12, characterized in that the at least one contact can be determined by means of resistance measurement.

14. The method according to claim 12, characterized in that the at least one contact can be determined by an electric short-circuit, wherein at least the clothings (14a) of the flat bars (14) and the clothing (4a) of the drum (4) are electrically insulated and electric voltage is applied to both components.

15. The method according to any of the claims 12 to 14, characterized in that determining the contacts over a course of a partial circumference of the drum (4) is stored in a control and can be visually illustrated.

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