EP2737117B1 - Dispositif de serrage pour un métier à filer - Google Patents

Dispositif de serrage pour un métier à filer Download PDF

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Publication number
EP2737117B1
EP2737117B1 EP12737186.2A EP12737186A EP2737117B1 EP 2737117 B1 EP2737117 B1 EP 2737117B1 EP 12737186 A EP12737186 A EP 12737186A EP 2737117 B1 EP2737117 B1 EP 2737117B1
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EP
European Patent Office
Prior art keywords
pressure arm
receptacle
axle
axis
suction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP12737186.2A
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German (de)
English (en)
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EP2737117A1 (fr
Inventor
Ludek Malina
Robert Nägeli
Gabriel Schneider
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP2737117A1 publication Critical patent/EP2737117A1/fr
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    • 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
    • D01H5/70—Constructional features of drafting elements
    • D01H5/72—Fibre-condensing guides
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/02—Spinning or twisting machines in which the product is wound-up continuously ring type
    • D01H1/025—Spinning or twisting machines in which the product is wound-up continuously ring type with a condensing device between drafting system and spinning unit
    • 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
    • D01H5/70—Constructional features of drafting elements
    • D01H5/74—Rollers or roller bearings

Definitions

  • the invention relates to a compression unit of a unit mounted at the exit of a drafting unit for compacting a fiber strand supplied by the drafting unit of a spinning machine, the compacting unit comprising a support on which at least one suction drum provided with a suction zone is rotatably mounted on an axle and on which in order to form a nip at the end of the suction zone in each case one, mounted on the carrier pinch roller under the action of a, attached to the carrier pressure element rests.
  • a variety of designs are already known, for compacting (compacting) of the votes of a drafting unit fiber material (fiber strand) downstream of a compacting device.
  • a swirl-generating device is supplied.
  • Such a swirl generating device consists for. Example, in a ring spinning machine from a rotor which rotates on a ring, wherein the yarn produced is wound on a rotating sleeve.
  • compression means are substantially evacuated circumferential, perforated suction drums or circumferential, provided with perforations straps used.
  • compression devices are known, which can also be subsequently added to existing drafting units.
  • a pinch roller is pressed against the respective suction drum via a spring element secured to a support of the assembly to create a nip point for the compressed fiber material downstream of the suction zone before being fed to a subsequent spin-generating device.
  • the proposed attachment of the pinch roller requires special tools and is inflexible. That is, in order to release the nip between the suction drum and the pinch roller, the gland must first be loosened. Only then can the clamping roller be removed from its clamping position.
  • the compacting unit comprises a flexible compacting belt which wraps around a roller, a suction shoe and a deflection bar.
  • the roller looped around by the compacting apron is assigned on the upper side a clamping roller and on the underside a drive roller extending over the length of the machine.
  • the compression unit can be attached following a drafting unit.
  • the drive roller is mounted for this purpose in an extension part, which is attached by screws to a punch of the drafting unit.
  • a loading lever is provided to guide and load the pinch roller.
  • the loading lever is pivotally mounted by means of a bolt at a pivot point in a support piece.
  • the support piece is attached to a support rod extending through all the punches along the machine.
  • the load lever is under the tensile load of a tension spring, which is mounted on the support piece and the loading lever. Due to the structure described, the assembly of pinch roller, load lever and tension spring can not be decoupled together with the compression device of the drafting unit. The conversion of a drafting with compression device to a drafting without compression device therefore proves to be time consuming.
  • This is in contrast to the subject invention an integral part of a drafting unit of a spinning machine, ie the compacting device is not downstream of a drafting unit of a spinning machine.
  • the compacting device is in this case formed by a rotatably mounted screen drum, which is fastened on a rotation axis.
  • the screen drum simultaneously represents the lower roller of the pair of output rollers of the drafting system. That is, in the DE 197 26 694 A1 shown compaction screen drum is an integral part of the drafting unit. Therefore, the compression device can not be easily decoupled from the drafting unit.
  • the clamping roller is rotatably mounted on an axis rotatably mounted on a, about a pivot axis pivotally mounted on the carrier and provided with a spring element pressure arm. Due to the pivotable arrangement, the pinch roller can be easily pivoted from its clamping position into an inoperative position. Equally simple is the pivoting back into an operating position from the non-operating position, wherein the previously set pressure force of the spring element remains constant. Furthermore, it is proposed that the spring element between the pivot axis of the pressure arm and the axis of rotation of the pinch roller is mounted. Thus, a compact design of the pressure arm can be achieved.
  • a stop on the support is provided, which projects into the range of movement of the pressure arm to keep the pressure arm in an over-center position, in which the axis of the pinch roller is adjacent to a plane which passes through the axis of the suction drum and the pivot axis of the pressure arm.
  • Overlying suction drums is provided and each suction drum is associated with a respective pinch roller, wherein the pinch rollers are rotatably mounted on a common pressure arm on a common axis.
  • the pressure arm is provided with a pointing in the direction of the suction drums open, U-shaped receptacle for the axis of the pinch rollers. This makes it possible to transfer the axis of the pinch rollers over the opening of the recording quickly and without special tools in their working position within the recording. Furthermore, it is proposed that the length of the receptacle, seen in the longitudinal direction of the pressure arm, is greater than the diameter of the guided in the recording axis of the pinch rollers and at least one, acted upon by the spring element element in the range of movement of the axis in the longitudinal direction of the recording in the Intake sticks out.
  • the displacement of the axis of the pinch rollers in the longitudinal direction of the receptacle is made possible, wherein it is simultaneously loaded via the protruding into the receiving element with a compressive force by the spring element.
  • the clear width of the receptacle in the region of its opening is smaller than the diameter of the guided in the recording axis of the pinch rollers. This makes it possible to keep the mounted in the recording axis of the pinch rollers in the recording, even if the pinch roller no longer receives back pressure in the swung-out state through the suction drum.
  • the pressure force exerted on the axis of the pinch rollers via the spring-loaded element projecting into the receptacle is smaller than the force which is sufficient to press the axis out of the restricted opening of the receptacle.
  • the pre-assembly of the pressure arm is made possible with the pinch rollers without the pinch rollers fall out of the recording of the pressure arm.
  • at least the receptacle made of an elastic material, for. B. made of a plastic.
  • the material Due to the elasticity of the material (eg plastic), the material returns to its original position in the area of the opening and thus locks the axle in the mounted position in the receptacle.
  • the sum of the maximum excess mass with which the element can project into the receptacle under spring loading and the diameter of the in The axis of the recording of the pinch rollers is greater than the length of the receptacle between an inner end boundary and the region of the opening with reduced clearance.
  • the still acting pressure force in the described forward position is smaller than the force which is necessary to push the axis of the pinch rollers over the restricted position of the opening of the receptacle.
  • the pressure arm is provided with an axis arranged transversely to its longitudinal axis, which projects beyond the pressure arm in its width and the carrier has two opposing guides on which the pressure arm at the transfer is guided in its pivot position.
  • the guides elements are resiliently evasive mounted, which locks the axis of the pressure arm when reaching its pivot position in this position.
  • the resiliently mounted elements can be transferred without special tools in a position to achieve a release of the axis of the pressure arm. Subsequently, this can be easily disassembled on the guides.
  • the pressure arm can be made of plastic and the spring element can be accommodated in an encapsulated space of the pressure arm. This gives a compact and closed unit, in which also the spring element is protected from dirt.
  • FIG. 1 shows a schematic side view of a spinning station 1 a spinning machine (ring spinning machine) with a drafting unit 2, which is provided with an input roller pair 3, 4, a middle roller pair 5, 6 and a pair of output rollers 7, 8.
  • a strap 12, 13 out which are each held around a cage, not shown in detail in its illustrated position.
  • the upper rollers 4, 6, 8 of said pairs of rollers are designed as pressure rollers, which are rotatably mounted on the axes 4a, 6a, 8a on a pivotally mounted pressure lever 10.
  • the pressure lever 10 is pivotally mounted about an axis 15 and, as shown schematically, acted upon by a spring element F.
  • This spring element can, for. B. also be an air hose.
  • the rollers 4, 6, 8 pressed against the lower rollers 3, 5 and 7 of the roller pairs to form a nip for the fiber material.
  • the roller pairs 3, 5, 7 are (not shown) connected to a drive. Individual drives, as well as other forms of drive (gears, timing belts, etc.) are used.
  • About the driven lower rollers 3, 5, 7, the pressure rollers 4, 6, 8, and the belt 13 are driven via the belt 12 via friction.
  • the peripheral speed of the driven roller 5 is slightly higher than the peripheral speed of the driven roller 3, so that the, the drafting unit 2 supplied fiber material in the form of a sliver L between the input roller pair 3, 4 and the middle roller pair 5, 6 is subjected to a pre-delay.
  • the main distortion of the fiber V arises between the middle roller pair 5, 6 and the pair of output rollers 7, 8, wherein the output roller 7 has a substantially higher peripheral speed than the center roller 5.
  • a pressure lever 10 is assigned to two adjacent drafting unit units 2 (twin drafting unit 2z). Since it is the same or partially mirror-image arranged elements of the adjacent drafting units, or compression devices, the same reference numerals are used for these parts.
  • the drawn out of the output roller pair 7, 8 stretched fiber material V is deflected downward and enters the region of a suction zone Z of a subsequent suction drum 17.
  • the respective suction drum 17 is provided with extending on its circumference perforations or openings ⁇ ( Fig.1f ) Mistake.
  • a stationary mounted suction insert 18 is arranged in each case, which is fastened to a support 20 of a compression unit VM.
  • Designs and arrangements of the absorbent insert are in the not yet published Swiss patent application CH-01992/10 from 26.11.2010 shown.
  • drive elements which are connected to the respective suction drum 17 and occupy a frictional connection in the operating position with the lower roller 7 of the pair of output rollers.
  • the respective suction drum 17 or drive means connected to it lies on the circumference of the driven roller 7 and is driven by the latter via friction.
  • the contact pressure of the suction drum 17 on the lower roller 7 takes place in the example of Fig.1 via a leaf spring 68, which is fastened by screws 69 on the pressure lever 10.
  • the leaf spring exerts a compressive force in the direction of the attached to the carrier 20 essay 60 in the region of its end-mounted web 62, whereby the compression unit is locked in this position. It is also possible to mount the attachment 60 directly in the area of the bearing for the axle 22.
  • the suction drum 17, or two twin drums 2z associated suction drums 17 are rotatably mounted on a carrier 20 of the compression unit VM on a shaft 22 fixed to the carrier.
  • a suction channel SK which communicates with the respective suction insert 18, as shown schematically in FIG Fig.1 will be shown.
  • a machine frame MR of the spinning machine facing the end of the carrier 20, the carrier is provided with a U-shaped end piece 46, in which the suction channel SK opens with an opening S2.
  • the opening S2 is in the position shown an opening SR of a suction tube 50 opposite, which is fixed to the machine frame MR of the spinning machine.
  • a clamping roller 33 is provided for each of the suction drums 17, which rests on the respective suction drum 17 via a pressure load and forms with it a clamping line P.
  • the respective pinch roller 33 is rotatably mounted on an axis 32 which is held in a, provided with an opening 74 guide slot 73 of a U-shaped receptacle AN of a pressure arm 72.
  • the axis 32 is slidably mounted within the guide slot 73 transversely to its longitudinal axis.
  • a plunger 35 which rests on the outer circumference of the axis 32 and is acted upon by a compression spring F2.
  • the opening 38 is mounted approximately centrally at the end of the guide slot 73 and opens into a, substantially closed cavity 54, in which the compression spring F2 is arranged. This supports one end at the closed end of the cavity and lies with the opposite end on a head 36 of the plunger 35.
  • the head 36 has a larger diameter than the clear width of the opening 38. This prevents the ram 35 can slide with its head 36 through the opening 38 out.
  • the distance b1 between the enlarged diameters d1 is slightly larger than the width b of the receptacle AN of the pressure arm 72.
  • a narrowing w is provided in the region of the opening 74 of the guide slot w, which is smaller than the diameter d of the axis 32 and the inner clear Width k of the guide slot 73.
  • the mass k of the guide slot is only slightly larger than the diameter d to allow the displacement of the axis 32 within the guide slot.
  • the material deviates laterally in the region of the opening 74 and returns to its original position after passing through the axle 32.
  • the plunger 35 already comes to rest on the circumference of the axis 32 and exerts a compressive force on the axis 32 in the direction of the opening 74 of the receptacle AN under the action of the compression spring F2.
  • a distance a is now present, so that the spring force of the spring F2 comes into effect and on the plunger 35 can exert a compressive force on the circumference of the axis 32.
  • this force is less than the force which is necessary to push out the axis 32 over the constriction with the width w from the receptacle AN.
  • the axis 32 of the pinch rollers 33 is held in a stable position in the assembled state, even if no back pressure is generated by the suction drums with which they form a terminal point P in operation.
  • an axis 24 is attached to the pressure arm 72, which projects beyond the width b of the pressure arm 72 with a measure s on both sides.
  • the pressure arm 72 superior axis 24 of the pressure arm is pivotally held in a bearing element 80.
  • the bearing element 80 has two webs T running parallel to one another at a distance b2, between which the pressure arm 72 is arranged and can execute a pivoting movement.
  • the bearing element 80 is fixedly connected to the carrier 20.
  • a guide 81 is provided on the webs T, which have the shape of a longitudinal groove and facing each other.
  • the bolts 85 are bolts 87, which project into the respective guide 81 via an opening 88 in each case.
  • the bolts are each attached to one end of a spring bar 86, the other end of which is attached to the webs T via fastening means 89 on the outside.
  • the bolts are provided with an inclined surface 90, over which they against the spring action of the spring rod 86 through the, in the respective guide 81 moved axis 24 via the respective opening 88 from the range of movement of the axis, or from the Guide 81 are pushed out.
  • the bolts 87 are moved back into the region of the guides 81 under the spring force of the spring bars 86.
  • the return path for the axis 24 is blocked and fixed the axis in its pivoting position. Since the bolts 87 on the opposite side of the inclined surface 90 have a straight surface (which runs approximately parallel to the lateral surface of the axis 24), the disassembly of the pressure arm can be done only with additional handles or tools. This should prevent inadvertent release of the pressure arm from the pivot position.
  • the bars are pushed out of their respective opening 88 by hand or with additional aids, so that the axis 24 can pass through the locking point. After passing this point, the pressure arm on the guides 81 can be easily removed.
  • the nip line P between the suction drum 17 and the pressure roller resting on it, 33 simultaneously forms a so-called "rotation lock gap", from which the fiber is fed in the conveying direction FS in the form of a compressed yarn FK under rotation distribution of a ring spinning device shown schematically.
  • This is provided with a ring 39 and a rotor 40, wherein the yarn is wound on a sleeve 41 to form a coil 42 (Kops).
  • a yarn guide 43 is arranged between the nip line P and the rotor 40.
  • the ring 39 is attached to a ring frame 44, which performs an up and down movement during the spinning process.
  • a suction pipe 75 is attached to both sides of the support 20 and is provided with an opening (not shown). The suction pipe opens into the suction channel SK of the carrier 20th
  • the transfer of the suction drums 17 is shown from an inoperative position to an operating position.
  • the carrier 20 is shown only schematically dash-dotted lines. How out Fig.2 is to be transferred via the guide 52 (which simultaneously forms a stop for the lower pivot position of the compacting unit VM), the carrier 20 is transferred from a representation shown in dashed lines in a mounted first out of service position.
  • the end piece 46 when moving the support in the direction of the suction tube 50, the end piece 46 is pushed in the region of the coupling point KS on the suction pipe 50 by hand until it is seated on the suction pipe and clamped there.
  • Postponing The end piece 46 can now be the support 20, or the entire compression unit VM about the center axis MA of the suction tube 50 in the direction of the pair of output rollers 7, 8 of the drafting unit 2 pivoted about the end piece 46.
  • the suction drum 17 or drive means connected to it comes into contact with the lower roller 7, whereby a drive connection between the driven roller 7 and the suction drum 17 is produced via a frictional connection (friction).
  • the pinch roller 33 is pivoted under the action of the lower roller 7 and the spring F2 in an over-center position, which in Figure 4 is shown. That is, the axis 32 of the pinch roller 33 is now below the level VL in which the axis 22 of the suction drum 17 and the pivot axis 24 of the pressure arm 72 is located.
  • a stop 64 is mounted on the carrier 20 on which the pressure arm 72 comes to rest ( Figure 4 ).
  • the dismantling of the compression unit takes place in the reverse direction.
  • the return of the pinch roller 33 after disassembly into the in Fig.2 shown position can be done manually.

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

Claims (13)

  1. Unité de compression (VM) d'une unité de construction, montée à la sortie d'une unité d'étirage (2), pour comprimer une structure fibreuse, délivrée par l'unité d'étirage (2) d'une machine à filer, l'unité de compression (VM) comportant un support (20) sur lequel au moins un tambour d'aspiration (17), pourvu d'une zone d'aspiration (Z), est monté à rotation sur un axe (22) et sur lequel un rouleau de pincement (33), monté sur le support (20), est appliqué, sous l'action d'un élément de pression (F2) monté sur le support, à l'extrémité de la zone d'aspiration (Z) pour former une ligne de pincement (P), caractérisé en ce que le rouleau de pincement (33) est monté, à rotation sur un axe (32), sur un bras de pression (72) pourvu d'un élément élastique (F2) et monté sur le support (20) de manière à pivoter sur un axe de pivotement (24).
  2. Dispositif selon la revendication 1, caractérisé en ce que l'élément élastique (F2) est monté entre l'axe de pivotement (24) du bras de pression (72) et l'axe de rotation (32) du rouleau de pincement (33).
  3. Dispositif selon l'une des revendications 1 à 2 caractérisé en ce qu'il est prévu sur le support (20) une butée (64) qui fait saillie dans la zone de mouvement du bras de pression (72) pour maintenir le bras de pression dans une position de point mort supérieur dans laquelle l'axe (32) du rouleau de pincement (33) est situé à côté d'un niveau (VL) qui passe par l'axe (22) du tambour d'aspiration (17) et l'axe de pivotement (24) du bras de pression (72).
  4. Dispositif selon l'une des revendications 1 à 2, caractérisé en ce que l'unité de compression (VM) est pourvue avec deux tambours d'aspiration (17) coaxialement opposés et en ce que chaque tambour d'aspiration est associé un rouleau de pincement (33), les rouleaux de pincement étant montés sur un bras de pression commun (72) à rotation sur un axe commun (32).
  5. Dispositif selon la revendication 4, caractérisé en ce que le bras de pression (72) est pourvu d'un logement (AN) en forme de U qui est ouvert en direction des tambours d'aspiration (17) et qui est destiné à l'axe (32) des rouleaux de pincement (33).
  6. Dispositif selon la revendication 5, caractérisé en ce que la longueur (la) du logement (AN), vue dans la direction longitudinale du bras de pression (72), est supérieure au diamètre (d) du l'axe (32), guidé dans le logement, des rouleaux de pincement (33) et en ce qu'au moins un élément (35, 36), est sollicité par l'élément de pression (F2), fait saillie dans le logement dans la zone de mouvement de l'axe (32) dans la direction longitudinale du logement (AN).
  7. Dispositif selon la revendication 6, caractérisé en ce que la largeur intérieure (w) du logement (AN), au niveau de son ouverture (74), est inférieure au diamètre (d) de l'axe (32), guidé dans le logement, des rouleaux de pincement (33).
  8. Dispositif selon la revendication 7, caractérisé en ce que le logement (AN) en un matériau élastique, par exemple en matière plastique.
  9. Dispositif selon l'une des revendications 7 à 8, caractérisé en ce que la somme de l'étendue de projection maximale, avec laquelle l'élément (35) peut faire saillie dans le logement (AN) sous contrainte élastique, et du diamètre (d) l'axe (32), situé dans le logement, des rouleaux de pincement (33) est supérieur à la longueur (la) du logement entre une limite d'extrémité intérieure et la zone de l'ouverture (74) de largeur intérieure réduite (w).
  10. Dispositif selon l'une des revendications 1 à 5, caractérisé en ce que le bras de pression (72) est pourvu d'un axe (24) qui est disposé transversalement à sa direction longitudinale et qui fait saillie du bras de pression dans sa largeur (b1) et en ce que le support (20) comporte deux guides (81) opposés l'un à l'autre qui permettent de guider le bras de pression (72) lors du transfert dans sa position de pivotement.
  11. Dispositif selon la revendication 10, caractérisé en ce que des éléments (87) sont montés de manière à être déviés élastiquement au niveau des guides (81), lesquels éléments bloquent l'axe (24) du bras de pression dans sa position de pivotement lorsque celle-ci est atteinte.
  12. Dispositif selon la revendication 11, caractérisé en ce que, pour démonter le bras de pression (72), les éléments (87), montés élastiquement, peuvent être transférés dans une position dans laquelle ils annulent le blocage de l'axe (24) et libère le démontage de l'axe par le biais des guides (81).
  13. Dispositif selon l'une des revendications 1 à 12, caractérisé en ce que le bras de pression (72) est formé à parti d'une matière plastique et l'élément élastique (F2) est logé dans un espace confiné (54) du bras de pression (72).
EP12737186.2A 2011-07-25 2012-06-29 Dispositif de serrage pour un métier à filer Active EP2737117B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH01242/11A CH705308A1 (de) 2011-07-25 2011-07-25 Verdichtungsvorrichtung für eine Spinnmaschine.
PCT/CH2012/000143 WO2013013329A1 (fr) 2011-07-25 2012-06-29 Dispositif de serrage pour un métier à filer

Publications (2)

Publication Number Publication Date
EP2737117A1 EP2737117A1 (fr) 2014-06-04
EP2737117B1 true EP2737117B1 (fr) 2016-04-27

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EP12737186.2A Active EP2737117B1 (fr) 2011-07-25 2012-06-29 Dispositif de serrage pour un métier à filer

Country Status (6)

Country Link
US (1) US9347151B2 (fr)
EP (1) EP2737117B1 (fr)
JP (1) JP6080847B2 (fr)
CN (1) CN103781952B (fr)
CH (1) CH705308A1 (fr)
WO (1) WO2013013329A1 (fr)

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CH706258A2 (de) * 2012-03-21 2013-09-30 Rieter Ag Maschf Tragelement für eine Verdichtungsvorrichtung.
CH709312A1 (de) * 2014-02-27 2015-08-28 Rieter Ag Maschf Verdichtungsvorrichtung mit Saugtrommel.
CN105821534B (zh) * 2016-04-20 2018-11-02 嘉兴学院 一种吸入式纺纱的纤维集聚方法、吸入式纺纱生头方法和装置
CH713916A1 (de) 2017-06-23 2018-12-28 Rieter Ag Maschf Verdichtungsvorrichtung für eine Spinnmaschine.

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US20140157551A1 (en) 2014-06-12
WO2013013329A1 (fr) 2013-01-31
JP2014521844A (ja) 2014-08-28
CN103781952B (zh) 2017-05-24
US9347151B2 (en) 2016-05-24
JP6080847B2 (ja) 2017-02-15
CH705308A1 (de) 2013-01-31
EP2737117A1 (fr) 2014-06-04

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