Teasel with a wandering lid

Abstract

Carding machine with a traveling cover (17), comprising at least two traction elements configured to receive a plurality of cover bars (20) in the region of their end faces and to guide them at least along a partial circumference of a drum (4) of the carding machine, wherein the traction elements with the cover bars (20) are guided around two deflection rollers (24, 25) arranged above the side plates (22) of the carding machine, characterized in that a bracket (23) is arranged between each pair of deflection rollers (24, 25), which is configured to receive further guide elements (26, 27, 28, 29, 35) for guiding the traction element, wherein the ends of the bracket (23) are arranged on flanges (24b, 25b) on which the deflection rollers (24, 25) are mounted.

Description

[0001] The invention relates to a carding machine with a traveling cover, comprising at least two traction elements configured to receive a plurality of cover bars in the region of their end faces and to guide them at least along a partial circumference of a drum of the carding machine, wherein the traction elements with the cover bars are guided around two deflection rollers arranged above the side plates of the carding machine, according to the preamble of claim 1.

[0002] German patent DE 2604465 A1 discloses a traveling cover for a carding machine in which the cover bars are arranged on circulating belts or chains and guided in a circuit around a partial circumference of the drum. For this purpose, two guide rollers are arranged at the deflection points of the belt drive. Guide elements or sliding guides are arranged between the guide rollers and are attached to flanges or components. The flanges or components extend from the side plate to the upper sliding guide, thus limiting the available space between the circulating cover bars. The belt or chain is adjusted using a spring balance by measuring the contact force of a cover bar on the flexible arc or sliding guide. This is very imprecise and only provides an indirect indication of the belt or chain tension.

[0003] Aufgabe der Erfindung ist die Weiterbildung eines Wanderdeckels für eine Karde, die eine leichte Zugänglichkeit der Deckelstäbe ermöglicht und die eine reproduzierbare Einstellbarkeit ermöglicht.

[0004] This problem is solved by the features of claim 1. Advantageous embodiments of the invention are specified in the dependent claims.

[0005] The carding machine according to the invention has a traveling cover comprising at least two traction elements designed to receive a plurality of cover bars in the region of their end faces and to guide them at least along a partial circumference of a drum of the carding machine, wherein the traction elements with the cover bars are guided around two deflection rollers which are arranged above the side plates of the carding machine.

[0006] The invention is characterized in that a bracket is arranged between each pair of deflection rollers, which is designed to accommodate further guide elements for guiding the traction element, wherein the ends of the bracket are arranged on flanges on which the deflection rollers are mounted.

[0007] The traction elements can be designed as belts or chains and hold the cover bars at their ends with pins, plastic elements, or other connecting means. The traction elements guide the cover bars along their circumference, at least along a partial circumference of a drum, so that fibers between the cover and drum components are aligned and cleaned within a very narrow gap. The traction elements are guided around two deflection rollers. At one deflection roller, the cover bars are removed from contact with the fibers and the drum and cleaned by suction and a brush before being guided back to the drum at the second deflection roller. At least one roller is equipped with a drive mechanism to power the traction element.By positioning a bracket between each pair of deflection pulleys, designed to accommodate additional guide elements for guiding the traction element, a gap is created between the lower and upper runs of the traction element. This gap can be used for inspecting, removing, or cleaning the cover bars. The space in the area of ​​the side plates is not obstructed by the fastening elements to which the bracket is attached.

[0008] Preferably, the stirrup has a first and a second end located in the area of ​​the deflection pulleys, with the stirrup bridging at least a partial gap between the deflection pulleys in an arc shape. The design of the stirrup as an arc-shaped bridge allows for high stability and considerable design freedom for the space between the upper and lower runs of the traction element.

[0009] In an advantageous embodiment, a first end of the bracket is rotatable, and the second end has a support that rests on an adjustment element. This results in easy mounting of the bracket, which no longer needs to be laboriously mounted and adjusted on the side plate of the carding machine.

[0010] Because the tension of the tensioning cord presses the second end of the bracket onto the adjustment element, active fastening of the bracket at this second end is unnecessary. The tension of the tensioning cord ensures a permanent and precise contact with the adjustment element.

[0011] Preferably, the adjusting element is designed as an eccentric that interacts with the support of the bracket. The tension on the traction element can be adjusted via the eccentric, because depending on the position of the eccentric, the bracket presses more or less against the tension of the traction element.

[0012] Because the bracket is designed to pivot around a pivot point with a defined force at its first end, the tension on the traction element can be easily and precisely adjusted.

[0013] Preferably, a defined force is applied to the second end of the bracket, whereby the pivoted position of the bracket is fixed by clamping the eccentric, which is in contact with the bracket's support. The defined force can be generated, for example, by springs, pneumatic or hydraulic means, or by lever force.

[0014] Because the defined force is generated using a lever and a weight, which can be mounted on the carding machine near the second end of the bracket to adjust the tension of the traction element, the tension on the traction elements can be adjusted simply and reproducibly. The lever and weight can be easily stored inside the carding machine or given to the technicians.

[0015] Preferably, the handle has at least two additional guide rollers for directing the traction element, thereby reducing friction during its deflection. The use of two additional guide rollers, for a total of four per handle, allows for the use of smaller diameter guide rollers, thus increasing the clearance between the upper and lower runs of the traction element.

[0016] The additional guide element on the bracket reduces the tension on the pulling force due to the weight of the cover bars.

[0017] The movable cover according to the invention allows for a large gap between the tensioning element, making it easy to install or remove the cover rods. This gap also allows for inspection of the condition of the cover rods and can be used to clean the movable cover. At the same time, the tensioning element can be reproducibly tensioned using very simple means.

[0018] Further measures improving the invention are described in more detail below, together with a description of a preferred embodiment of the invention, with reference to the figures. The figures show: Fig. 1 a schematic side view of a carding machine with the device according to the invention; Fig. 2. A representation of the traveling cover according to the state of the art; Fig. 3 a representation of the traveling cover according to the invention; Fig. 4. A diagram showing how to tension the straps of the traveling cover; Fig. 4a an enlarged detail view of Fig. 4; Fig. 5 a representation on the reverse side of the hiking cover.

[0019] Fig. Figure 1 shows a carding machine 100 according to the prior art, in which fiber flakes are guided via a chute to a feeding roller 1, a feeding table 2, via several pre-tears 3a, 3b, 3c, to the drum 4 or the tambour. On the drum 4, the fibers of the fiber flakes are parallelized and cleaned by means of stationary and rotating carding elements 20 arranged on a moving cover 17. The resulting fiber web is subsequently conveyed via a take-up roller 5, a take-up roller 6 and several squeeze rollers 7, 8 to a web guide element 9, which forms the fiber web into a fiber ribbon with a hopper 10. This ribbon is then transferred via take-up rollers 11, 12 to a downstream processing machine or a can 15.

[0020] Fig. Figure 2 shows a traveling cover 17 according to the prior art. The traveling cover 17 comprises at least two belts 17a, which are arranged on both sides of the drum 4 and interact with pins arranged on them in the area of ​​the end faces of the cover bars 20. That is, each cover bar 20 is fastened on both sides by means of the pins arranged on its end faces in a belt 17a, which is guided above the side plates 22 and arranged circumferentially. In the following illustrations, only one side of the carding machine is shown, whereby it is clear to those skilled in the art that the traveling cover 17 described here is guided on both sides of the carding machine. Each belt 17a is guided over at least two deflection pulleys 24, 25, wherein the deflection pulleys 24 and 25 are rotatably mounted on bearing elements 24a, 25a. The bearing elements 24a, 25a, in turn, are arranged on the side plates 22 of the carding machine 100.At least one of the deflection pulleys 24 or 25 is coupled to a drive that drives the belts 17a with the travel covers 20 along their travel path. Further deflection pulleys 26, 27 or guides for the belt 17a can be arranged between the deflection pulleys 24, 25. A bracket 23 is arranged on each side of the drum 4 on the side plate 22, on which the two middle deflection pulleys 26, 27 are arranged and rotatably mounted. Each bracket 23 is also arranged on the side plate 22 of the carding machine 100 and is designed to allow adjustment of the belt tension 17a by means of an adjusting device 23a.

[0021] A suction device 30 is also arranged on a bearing element 25a, with which dirt and fiber residues are extracted from the covers of the carding bars. Next to the suction device 30, a cleaning device in the form of a rotating brush (not further specified) is arranged on the bracket 23. The covers 20 run between the deflection rollers 24 and 25 on the drum 4 over a slide rail 18, which is arranged on a flexible arch 21. The flexible arch 21 is adjustable on the side plate by means of an adjusting spindle 19. The slide rail 18 can be configured to be concentric with the drum and adjustable in distance to the flexible arch 21. The carding gap between the drum 4 and the covers 20 can be adjusted by adjusting the flexible arch 21 and the slide rail 18. In the exemplary embodiment of the Fig. In the area of ​​the drum 4 or the visible side panel 22, the cover bars 20 move counterclockwise against the direction of rotation of the drum 4, guided here by the slide rail 18. After being deflected around the deflection pulley 25, the cover bars 20 are moved to the right by the belt 17a in this illustration. The tension of the belt 17a is generated exclusively by the bracket 23, which is adjustable at a central position on the side panel 22. The contour of the bracket 23 corresponds to the triangular shape of an inverted clothes hanger, with the adjusting device 23a attached to the side panel 22 at one central corner (the hanger's suspension point), and the deflection pulleys 26 and 27 rotatably mounted at the other two corners.The arrangement and contour of the bracket 23 has the disadvantage of the complex adjustment of the belt tension and the poor accessibility in the traveling cover 17 between the cover bars 20.

[0022] After Fig. 3. The traveling cover 17 according to the invention is guided on each side of the carding machine 100 between the deflection rollers 24 and 25 by at least two further deflection rollers 26, 27, which are arranged on a curved bracket 23. The bracket 23 spans the upper run of the belt 17a, which is not located in the area of ​​the drum 4. The bracket 23 is attached to two flanges 24b, 25b, which are arranged on the bearing elements 24a, 25a. The bracket 23 is rotatably mounted at one end on a first flange 25b about the pivot point 31. The second end of the bracket 23 rests loosely on a second flange 24b with a support 23b on an adjusting element arranged on the second flange 24b and is pressed against the support 23b by the tension of the belt 17a. The bracket 23 thus has the shape of a bridge, which arches over the distance between the flanges 24b, 25b.Between the bracket 23 and the side plate 22 above the drum 4, a space accessible from both sides of the drum 4 is created, which can be used for cleaning or for inspecting or removing individual cover bars 20. Advantageously, the upper surface of the bracket 23 is convex and the lower surface of the bracket 23 is concave, in order to ensure sufficient stability on the one hand, and to make the space between the bracket 23 and the side plate 22 above the drum 4 as large as possible on the other.

[0023] In an advantageous embodiment, four deflection rollers 26, 27, 28, 29 are arranged on each bracket 23, which ensure sufficient guidance for each belt 17a.

[0024] The exemplary embodiment of the Fig. 4 and Fig. Figure 4a shows the arrangement of the bracket 23 between the flanges 25b and 24b without the belt 17a and without the cover rods 20. The bracket 23 is rotatably attached at one end to the flange 25b via the pivot point 31. The second end of the bracket 23 rests with its support 23b on an adjusting element, which in this embodiment is designed as a rotatable eccentric 32. A pivot point 24c is arranged on the second flange 24b, to which a two-armed lever 33 can be attached for adjusting the sliding cover 17. The lever 33 has a short lever arm on one side of the pivot point 24c, which interacts with the other side of the bracket 23. A longer lever arm of the lever 33 is arranged on the side facing away from the pivot point 24c of the bracket 23 and is designed to accommodate a weight 34.The weight 34, in conjunction with the two-armed lever 33, exerts a force on the second end of the bracket 23 against the belt 17a, thereby tensioning it with a reproducible force. To maintain the tension, the eccentric 32 is rotated into contact with the support 23b of the bracket 23 and locked in place. The belt 17a for the traveling cover 17 can thus be tensioned reproducibly on each side of the carding machine 100. After the belt is adjusted, the lever 33 with the weight 34 is removed. Instead of the version with the lever 33 and the weight 34, any other predefined force applied to the second end of the bracket 23 is suitable for generating a reproducible tension on the belt 17a, for example, a spring assembly or a pneumatic or hydraulic tensioning element.

[0025] Fig.Figure 5 shows the guide for a belt from the rear of the bracket 23, without the belt and without the cover bars. The deflection pulleys 24 and 25 are visible; at least one of these is coupled to a drive and deflects and guides the belt in the area of ​​the drum. In this embodiment, four deflection pulleys 26, 27, 28, 29 are arranged on the bracket 23. A further guide element 35 for the belt 17a is arranged on the bracket 23 between pulleys 26, 28 and pulleys 27, 29. Another guide element 35 is arranged on the flange 24b, which extends between deflection pulley 24 and deflection pulley 26 on the bracket 23. The flange 25b also has a guide element 35, which extends from deflection pulley 25 to deflection pulley 27.By means of the guide elements 35, which in this embodiment are designed as simple angles, the belt 17a with the cover rods 20 arranged on it can be guided on a straight path between the deflection rollers, without the weight of the cover rods 20 causing any additional tension in the belt 17a.

[0026] The device according to the invention enables easy and reproducible adjustment of the belt tension on the traveling cover 17, whereby the design and arrangement of the bracket 23 creates a large free space within the traveling cover, thus simplifying cleaning work or the replacement and inspection of cover bars 20.

[0027] The invention is not limited in its implementation to the preferred embodiment described above. Rather, a number of variants are conceivable, which utilize the solution presented even in fundamentally different designs. All features and / or advantages arising from the claims, the description, or the drawings, including design details or spatial arrangements, can be essential to the invention, both individually and in various combinations. Reference sign 100 cardoons 1 feed roller 2 Dining table 3a, 3b, 3c Tear-off 4 drums 5 customers 6 Take-off roller 7 Squeeze roller 8 crushing roller 9 fleece guiding element 10 funnels 11. Take-off roller 12. Take-off roller 13 Carding element 15 cans 17 traveling covers 17a Belt 18 sliding rails 19 adjusting spindle 20 lid rods 21 flexible bows 22 Side panel 23 irons 23a Adjustment device 23b edition 24 pulley 24a Bearing element 24b flange 24c pivot point 25 pulley 25a Bearing element 25b flange 26 Pulley 27 Pulley 28 Pulley 29 Pulley 30 Extraction 31 Pivot point 32 eccentrics 33 levers 34 Weight 35 Guide element QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 2604465 A1

[0002]

Claims

[1] Carding machine with a traveling cover (17) comprising at least two traction elements configured to receive a plurality of cover bars (20) in the region of their end faces and to guide them at least along a partial circumference of a drum (4) of the carding machine, wherein the traction elements with the cover bars (20) are guided around two deflection rollers (24, 25) arranged above the side plates (22) of the carding machine, characterized by , that between each pair of deflection rollers (24, 25) a bracket (23) is arranged which is designed to accommodate further guide elements (26, 27, 28, 29, 35) for guiding the traction element, wherein the ends of the bracket (23) are arranged on flanges (24b, 25b) on which the deflection rollers (24, 25) are mounted. [2] Carding according to claim 1, characterized by, that the bracket (23) has a first and a second end which are arranged in the area of ​​the deflection rollers (25, 26), wherein the bracket (23) bridges at least a partial distance between the deflection rollers (24, 25) in an arc shape. [3] Carding according to claim 1 or 2, characterized by , that a first end of the bracket (23) is rotatable and the second end has a support (23b) which rests on an adjustment element. [4] Carding according to claim 3, characterized by , that the second end of the lever (23) is pressed against the adjusting element by the tension of the traction element. [5] Carding according to claim 3 or 4, characterized by , that the adjusting element is designed as an eccentric (32) which interacts with the support (23b) of the bracket (23). [6] Carding according to claim 1, characterized by, that the stirrup (23) is designed to be pivoted with its first end about a pivot point (31) with a defined force in order to adjust the tension of the traction element. [7] Carding according to claim 6, characterized by , that the defined force is introduced at the second end of the bracket (23), whereby the pivoted position of the bracket (23) is fixed by clamping the eccentric (32) which is in contact with the support (23b) of the bracket (23). [8] Carding according to claim 6, characterized by , that the defined force is generated with a lever (33) and a weight (34) which can be mounted on the carding machine to adjust the tension of the traction element in the area of ​​the second end of the bracket (23). [9] Carding according to any one of the preceding claims, characterized by that the bracket (23) has at least two further deflection pulleys (26, 27) for guiding the traction element. [10] Carding according to claim 9, characterized by, that between the deflection rollers (26, 27) two further deflection rollers (28, 29) and / or a guide element (35) are arranged on the bracket.

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