Classifications

• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01H—SPINNING OR TWISTING
  • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
  • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
  • D01H5/46—Loading arrangements
  • D01H5/50—Loading arrangements using springs
  • D01H5/505—Loading arrangements using springs for top roller arms

Definitions

• the present invention relates to an arrangement for mounting a pressure roller on a load carrier of a drafting system of a textile machine, wherein the arrangement comprises a pressure roller holder for receiving a rotation axis of the pressure roller and a stationary with the pressure roller holder spring element via which the pressure roller holder is connectable to the load carrier.
• a generic arrangement is known for example from DE 38 23 872 A1, wherein the pressure roller holder and the spring element by means of a riveting operation are interconnected.
• the manufacturing process of the described arrangement is therefore relatively complicated.
• DE 10 2005 044 081 A1 proposes that the spring element be inserted into or onto the pressure roller holder. Although this represents a significant improvement of the method described above. Nevertheless, there is still the need to further simplify the connection between pressure roller holder and spring element.
• Object of the present invention is therefore to propose an arrangement for supporting a pressure roller on a load carrier of a drafting system of a textile machine and a method for producing the same, which meets this need.
• the arrangement for supporting a pressure roller is now characterized in that the spring element, by means of which the pressure roller holder is to be connected to the loading arm of a textile machine drafting system at a later time, with the aid of at least one clamping section of the pressure roller holder resting against an outer peripheral area of the spring element clamped and thereby fixed to the pressure roller holder.
• the fixation is therefore no longer using the known riveting, in which the spring element must have a bore for the passage of the rivet body.
• the spring element can be formed, for example, as a flat leaf spring, which are fixed by the clamping section or sections of the pressure roller holder.
• clamping portions which are preferably pressed or pressed after the loose connection of pressure roller holder and spring element in the direction of the outer peripheral portion of the spring element, thus producing a directed in the direction of the spring element holding force, which prevents release of the spring element from the pressure roller holder. While a clamping section with appropriate dimensioning for said fixation may be sufficient, it has been proven to provide at least two clamping sections, both of which exert a holding force in the direction of the spring element.
• spring element and pressure roller holder are initially (for example with the aid of a jig) mutually aligned. prepare.
• the alignment is preferably in the direction of the longitudinal axis of the spring element, which is perpendicular to the axis of rotation of the later of the
• Pressure roller holder held pressure roller runs. If the mutual position of pressure roller holder and spring element now corresponds to the predetermined desired value, then the clamping section or sections is pressed against the outer peripheral region of the spring element. The spring element is finally fixed in exactly the predetermined position relative to the pressure roller holder, so that the subsequent machining of the same can be omitted.
• the spring element at least in the region of the clamping portion has a higher hardness than the pressure roller holder in the region of the clamping portion. This ensures that only the clamping sections are deformed during the clamping process.
• the spring element retains its original shape in the area of the clamping section or sections and can be securely clamped by the retaining element. A subsequent yielding of the spring element and thus a release of the fixation is thereby excluded.
• the spring element has two opposite outer peripheral areas which are each clamped by opposite directions from the clamping sections of the pressure roller holder.
• This type of fixation is particularly stable and easy to implement.
• the spring element only needs to be placed between the two clamping sections and then aligned with respect to the pressure roller holder. Subsequently, the clamping portions, for example by means of a clamping pliers, in the direction of the spring element pressed and hold this in the manner of a vise.
• At least one clamping section extends over at least one third, preferably over at least half, more preferably over at least two thirds, of the longitudinal extent of the pressure roller holder extending parallel to the longitudinal axis of this clamping section.
• the at least one clamping section has a length whose magnitude is greater than the amount of the width of the spring element in the region of the clamping section.
• a ratio of at least 1.5: 1 is preferred.
• a lateral rotation of the spring element relative to the pressure roller holder can be avoided in this way, in particular when the clamping portions extend in the longitudinal direction of the spring element.
• the clamping portion is formed as a flange, by means of which the spring element is caulked to the pressure roller holder.
• the or the clamping portions clamp the spring element in this case not only by one of its peripheral portion inwardly directed holding force. Rather, the spring element of the or the clamping portion (s) is partially overlapped, so that the mutual contact surface is increased.
• the or the clamping portion (s) are thus pressed during the fixing process against the peripheral region of the spring element and additionally deformed such that they partially surround the spring element.
• the spring element is partially covered by the clamping section (s), which partially and for example, on both sides (in relation to the spring element). surrounded on its longitudinal axis).
• the preferably sharp-edged peripheral region of the spring element bite in this case with the or the clamping section (s), so that a secure and long-lasting fixation of the same is ensured.
• the clamping portion comprises a plurality of flanges, which are separated by one or more arranged between the crimping non-crimped portions.
• the already described curling need not be continuous.
• the force acting on the pressure roller holder during beading can be controlled more reliably and is generally lower than in the production of a continuous flange. The risk of damaging the pressure roller holder during the crimping process can thereby be virtually ruled out, even though the spring element is sufficiently strong.
• the arrangement comprises at least two clamping sections which are formed by side walls of the pressure roller holder.
• the side walls in this case preferably extend perpendicular to the later axis of rotation of the pressure roller (which, moreover, is preferably formed as a double roller or pressure roller twin with two roller sections and an axis of rotation connecting the roller sections).
• the upper portions of the side walls may finally be formed as a flange, which surround the spring element in its pressure roller holder associated end portion and thereby fix.
• the side walls preferably in a plan view of the arrangement, extend parallel to the longitudinal axis of the spring element.
• the side walls can be particularly easily removed from Shen are flanged and here form the clamping portions of the invention, which can eventually also run parallel to said longitudinal axis.
• the spring element is fixed in the direction of its longitudinal axis only by the force closure produced by the clamping with respect to the pressure roller holder. Additional retaining elements are not necessary in this case.
• the spring element is thus fixed in this case exclusively by the described clamping operation relative to the pressure roller holder, after which a mutual alignment of both components is carried out.
• the arrangement has a holding element for fixing the axis of rotation of the pressure roller on the pressure roller holder, wherein the holding element is also clamped by means of at least one clamping portion of the pressure roller holder and thereby fixed to the pressure roller holder.
• the holding element may also be present as a leaf spring, which is designed to press the later used axis of rotation of a pressure roller against the pressure roller holder.
• the axis of rotation in this case remains rotatable relative to the pressure roller holder, but is fixed in a direction perpendicular to the axis of rotation direction relative to the pressure roller holder. If the holding element is designed as a spring, the pressure roller can finally be removed from the pressure roller holder manually at any time without the need for special tools.
• the arrangement has a holding element for fixing the axis of rotation of the pressure roller, wherein the holding element or the pressure roller holder has an opening or indentation, in which an extension of the pressure roller holder or of the holding element engages.
• extension and opening (or indentation) finally causes the holding element relative to the pressure roller holder aligned and fixed by positive locking. This will ensure that the holding element always assumes the desired position with respect to the pressure roller holder.
• the holding element as the axis of rotation of the pressure roller partially encompassing (leaf) spring is formed because only the correct position ensures that the pressure roller is held securely even when lifting the load carrier and still by hand from the Pressure roller holder can be removed.
• the inventive method for producing an arrangement for mounting a pressure roller on the load carrier of a textile machine extender is finally characterized by the fact that the spring element, with which the pressure roller holder can be connected to the load carrier, aligned with respect to the pressure roller holder and at an outer peripheral region by means of at least a clamping portion of the pressure roller holder is clamped.
• the fixation of the spring element relative to the pressure roller holder wherein the fixation by the frictional connection between the spring element and the or the adjacent clamping section (s) takes place.
• the method according to the invention allows the positionally accurate alignment between spring element and pressure roller holder.
• both components are initially brought loose with each other.
• the loose connection in this case, the spring element is placed for example via one of its end portions in a recess of the pressure roller holder
• the orientation of the spring element relative to the pressure roller holder in this case, the correct alignment is of particular importance, in particular in the longitudinal direction of the spring element, since only by a correct alignment in the longitudinal direction can it be ensured that the pressure roller in the later drafting system faces exactly the correspondingly assigned counter-roller.
• the inventive device After the corresponding alignment (the spring element is thus displaceable in the longitudinal direction relative to the pressure roller holder before the fixing), the inventive device finally takes place. suitable clamping process.
• the or the clamping portions of the pressure roller holder are pressed against an outer peripheral portion of the spring element, so that there is a frictional connection between the spring element and the or the clamping portions of the pressure roller holder.
• the spring element is finally fixed in its exact nominal position and can only be solved with a force not occurring in normal operation of the drafting of the pressure roller holder.
• the clamping section is produced by crimping at least one side wall of the pressure roller holder.
• at least a portion of the pressure roller holder (preferably the end portions of its two extending in the longitudinal direction of the spring element side walls) wrapped around the said peripheral region of the spring element during the clamping operation and finally caulked with the spring element.
• the clamping portions which preferably lie opposite one another with respect to the spring element, thus engage around the spring element in its end region assigned to the pressure roller holder and thus ensure the desired mutual fixation of both components.
• the pressure rollers holder can be designed basically in several parts. It is of course conceivable that the one-piece design, the pressure roller holder should in principle in the region of the clamping portions or a lower hardness should have as the spring element (to prevent bending thereof during clamping).
• the pressure roller holder is brought into contact with a holding element before the clamping of the spring element, which subsequently fixes the axis of rotation of the pressure roller, and that the holding element subsequently likewise clamped with the aid of at least one clamping section of the pressure roller holder and thereby fixed on the pressure roller holder becomes.
• Spring element and retaining element can in this case be fixed by the same or the same clamping section (s). So it is conceivable the retaining element is placed between the pressure roller holder and the spring element. Retaining element and spring element are preferably placed in this case on the pressure roller holder, aligned and finally clamped. If the clamping takes place by crimping corresponding sections of the pressure roller holder, these sections finally press the spring element against the holding element and both components together against the pressure roller holder. As a result, all elements are fixed relative to each other.
• the retaining element is inserted before the clamping of the spring element between the pressure roller holder and the spring element.
• the holding element and the spring element can finally be clamped by at least one common clamping portion and thereby fixed to the pressure roller holder.
• the fixation of said components is thus uniform, so that only a clamping operation is necessary.
• the fixation is preferably carried out in this case by pressing two of the spring element adjacent side wall portions of the pressure roller holder to the spring element.
• FIG. 1 shows a partially sectioned side view of a fixed to a load carrier of a drafting arrangement for supporting a pressure roller according to the prior art
• FIG. 2 shows a partial plan view of the arrangement from FIG. 1,
• FIG. 3 shows a side view of a detail of an arrangement according to the invention and a section along the sectional area BB 'in FIG. 4,
• FIG. 4 shows plan views of an arrangement according to the invention before and after the clamping of the spring element,
• FIG. 5 shows a partial cross section of an arrangement according to the invention before and after the clamping of the spring element (sectional profile along the sectional area A-A 'in FIG. 3),
• Figure 6 shows an alternative embodiment of the arrangement shown in Figure 5 before and after the clamping of the spring element
• Figure 7 is a plan view of an arrangement according to the invention after the clamping of the spring element.
• Figure 1 shows a partially sectioned arrangement for mounting a pressure roller 1 of a drafting system of a textile machine (for example, a ring spinning machine).
• the arrangement comprises a pressure roller holder 3 with a downwardly open recess in which the axis of rotation 4 of the pressure roller 1 is held by means of a holding element 10 (eg a correspondingly bent leaf spring).
• the pressure roller 1 is, for example, a pair of rollers, i. H. around a roller with two roller sections 21 connected via a rotation axis 4.
• a spring element 5 which may also be formed as a leaf spring
• the spring element 5 ensures that the pressure roller 1 rests against a counter-roller 20 with a certain bearing force.
• the counter-roller 20 may have a plurality of roller sections 21.
• the counter-roller 20 in the form of a driven cylinder, the preferably extends over several of the arrangements according to the invention and is thus associated with a plurality of pressure rollers 1.
• the pressure roller 1 and the counter-roller 20 finally serve to guide a fiber composite 22, which is also shown schematically in FIG.
• the spring element 5 itself is connected to the load carrier 2, for example via a carriage 19, the position of which can be adjusted by releasing a screw fixing 16 fixing the carriage 19 by displacing the carriage 19 in the direction of the double arrow shown in FIG.
• the rovfix ist 16 penetrates this z. B. a slot 17 of the load carrier second
• the spring element 5 can only be suspended in the carriage 19, wherein this can have a support element 15 for fixing the position, which engages in a corresponding opening 23 of the spring element 5.
• the support on the side facing away from the support member 15 of the spring element 5 can finally take place via an indicated in Figure 1 Appendix 14.
• FIGS. 3 to 5 A possible embodiment of an arrangement according to the invention for supporting a pressure roller 1 on a load carrier 2 of a drafting system of a textile machine can be seen from the synopsis of FIGS. 3 to 5 (the right-hand representation in FIG. 3 corresponds to a section along the sectional surface BB 'in FIG. 4) Representation in Figure 5 corresponds to a section along the sectional area AA 'in Figure 3, the left view in Figure 5 shows the arrangement according to the right representation in Figure 5 before the clamping process according to the invention).
• the fixing of the spring element 5 and also of the holding element 10 takes place by crimping the two side walls 8 of the pressure roller holder 3.
• the crimp 7 causes a frictional connection between the pressure roller holder 3 and the spring element 5, which in turn between the Pressure roller holder 3 and the spring element 5 is placed and is also indirectly fixed by the flange 7, which in turn presses the spring element 5 against the holding member 10 and the holding member 10 against the pressure roller holder 3.
• the pressure roller holder 3 is preferably made of a material (eg aluminum), which is softer than the spring element 5 (which consists for example of spring steel), at least in the region in which the flange 7 is to be formed.
• FIG. 5 A comparison of the figures shown in Figure 5 shows how the inventive arrangement can be assembled (see also the right-hand illustration in Figure 3).
• the holding member 10 is placed on the pressure roller holder 3.
• the latter can have an extension 12 (or another bulge) (eg in the form of a centering mandrel) which, when the holding element 10 is placed in an opening 11 (or Indentation) of the same engages.
• an extension 12 or another bulge
• the holding element 10 is placed in an opening 11 (or Indentation) of the same engages.
• the side walls 8 extending parallel to the longitudinal axis 9 of the spring element 5 are preferably pressed in their upper regions adjacent to the spring element 5 in the direction of the spring element 5.
• the said areas finally nestle tightly against the spring element 5, with clamping sections 6 in the form of the flanges 7 shown in FIGS. 3 to 5.
• the clamping portions 6 "bite" this downright with the preferably sharp-edged outer edges of the spring element 5, so that the fixation of the same would be possible only by entry of a high external force, which is not recorded in normal operation of the drafting system.
• the clamping operation is a certain amount of space 13 (see left illustration in Figure 6).
• the individual components must also be guided laterally during clamping in order to prevent the individual elements from rotating one another.
• a corresponding free space 13 can also be provided in the case of the arrangement shown in FIG. Likewise, the free space 13 in FIG. 6 can be dispensed with.
• FIG. 7 shows a plan view of a further embodiment of an arrangement according to the invention.
• the two extending in the region of the side walls 8 of the pressure roller holder 3 clamping portions 6 are not formed as a continuous flanges 7. Rather, each clamping section 6 has in each case a plurality of crimped and non-crimped sections.
• the advantage of such an embodiment lies in the fact that for the beading of the individual sections a lesser force entry is necessary than in Case of the variant shown in Figure 4. The risk that the crimping operation also leads to a deformation of the pressure roller holder 3 is minimized in this case.
• the number of crimped and not crimped portions is not limited to the number shown in FIG. So more or less flared sections per terminal section 6 are quite possible.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Textile Engineering (AREA)
• Spinning Or Twisting Of Yarns (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=48741142

Family Applications (1)

Country Status (5)

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• 2012
  • 2012-07-03 DE DE102012105898.9A patent/DE102012105898A1/de not_active Withdrawn
• 2013
  • 2013-07-01 CN CN201380035407.1A patent/CN104471127A/zh active Pending
  • 2013-07-01 IN IN739DEN2015 patent/IN2015DN00739A/en unknown
  • 2013-07-01 WO PCT/EP2013/063820 patent/WO2014005990A1/de not_active Ceased
  • 2013-07-01 EP EP13732942.1A patent/EP2870282A1/de not_active Withdrawn

Non-Patent Citations (1)

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