EP0481181B1 - Dispositif de pincage pour une machine de peignage - Google Patents

Dispositif de pincage pour une machine de peignage Download PDF

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Publication number
EP0481181B1
EP0481181B1 EP19910113204 EP91113204A EP0481181B1 EP 0481181 B1 EP0481181 B1 EP 0481181B1 EP 19910113204 EP19910113204 EP 19910113204 EP 91113204 A EP91113204 A EP 91113204A EP 0481181 B1 EP0481181 B1 EP 0481181B1
Authority
EP
European Patent Office
Prior art keywords
feed cylinder
nipper
aggregate
feed
cylinder
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.)
Expired - Lifetime
Application number
EP19910113204
Other languages
German (de)
English (en)
Other versions
EP0481181A1 (fr
Inventor
Oliver Wüest
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
Original Assignee
Maschinenfabrik Rieter AG
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Filing date
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Publication of EP0481181A1 publication Critical patent/EP0481181A1/fr
Application granted granted Critical
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G19/00—Combing machines
    • D01G19/06—Details
    • D01G19/14—Drawing-off and delivery apparatus
    • D01G19/16—Nipper mechanisms
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G19/00—Combing machines
    • D01G19/06—Details
    • D01G19/08—Feeding apparatus
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G19/00—Combing machines
    • D01G19/06—Details
    • D01G19/14—Drawing-off and delivery apparatus

Definitions

  • the invention relates to a forceps unit for a combing machine, with a forceps lower part, with which a forceps upper part is movably connected, with a first rotatable feed cylinder, which cooperates with an adjacent second rotatable feed cylinder by pressing means for resiliently pressing against one another.
  • a cotton wool to be combed is fed into the feed cylinder during operation.
  • the feed cylinder is rotated intermittently to move the cotton towards the pinching line of the forceps unit.
  • the feed cylinder which is generally fluted, presses the cotton against an element of the lower part of the tongs in the form of a so-called feed trough.
  • this element there is also a certain amount of friction between this element and the cotton, which entails the risk of fiber shifting in the cotton, especially if you want to work with higher cotton weights or thicker cotton.
  • the downsizing the diameter is again at the expense of the bending stiffness, which means that the clamping force, especially in the case of thicker wadding, cannot be applied uniformly over the entire width of the feed cylinder.
  • the retention force on the fibers located in the clamping point, in particular in the central region of the feed cylinder is too small, so that partially uncombed fibers are also entrained in the tearing process.
  • the object of the invention is to avoid the disadvantages of the known prior art and to design the forceps unit specified at the outset in such a way that fiber displacements in the cotton wool can be avoided even with relatively thick cotton wool and even with a smaller diameter of the feed cylinder, sufficient retention force during the Tear off is present.
  • the aim is to make the diameter of the feed cylinder as small as possible, so that the feed cylinder can be arranged as close as possible to the clamping line of the forceps unit in order to combed out a combed one Fibrous from the cotton lying in the tongs unit to divert this cotton a short distance behind the clamping line and to guide it into the cotton channel between the feed cylinder and the lower part of the tongs.
  • the fiber guidance can thus be improved; fewer uncombed tufts of fibers are torn out of the wadding than at a greater distance from the pinch clamp line to the feed cylinder.
  • the forceps assembly according to the invention is characterized in that the first feed cylinder delimits a cotton-guiding channel with an element of the forceps lower part.
  • the pressing devices can be designed to also press the first-mentioned feed cylinder resiliently against the named element of the lower part of the forceps in order to further improve the fiber guidance (retention of uncombed fibers in the cotton wool).
  • the two feed cylinders can preferably be positively coupled to one another in the operating position so that they always rotate at the same circumferential speeds when the cotton wool is moved.
  • the first mentioned feed cylinder can be positioned between an operating position in which the two feed cylinders are resiliently pressed against one another and a rest position at a distance from the other feed cylinder and from the element mentioned Lower part of the pliers can be moved.
  • the first-mentioned feed cylinder can preferably be held by swivel arms which are pivotally connected to the lower part of the tongs and which can be locked in a position in which the first-mentioned feed cylinder is in its operating position.
  • the lower part of the forceps can carry a cotton wedge which extends into the gap between the two feed cylinders in order to guide the cotton towards the gap between the first mentioned feed cylinder and the mentioned element of the lower part of the forceps.
  • FIG. 1 and 2 schematically show a combing head a circular comb roller 1, a fixed comb 2, a tear-off cylinder pair 3 and a pair of pliers with a lower part 4 of pliers and an upper part 5 of pliers 5 7.
  • the lower jaw frame 6 is articulated at its front end to front supports 8 which can be pivoted about the axis of the circular comb roller 1 and at its rear end to tong pivot arms 9.
  • the upper jaw part 5 essentially consists of upper jaw arms 10 and an upper jaw plate 11 carried by them.
  • the upper jaw arms 10 are pivotally connected to the lower jaw frame 6 about an axis 12.
  • the pliers unit In operation, the pliers unit is moved back and forth between its front end position and a rear end position. In the rear end position, the pliers assembly is closed, between the front edge of the lower pliers plate 7 and the lower edge of the upper pliers plate 11 a fiber beard is clamped by a cotton wool W to be combed, which is combed out by a circular comb segment (not shown) arranged on the rotating circular comb roller 1 . The pliers unit is then moved into its front end position and opened, and the tear-off cylinder pair 3 tears off the combed fiber beard from the cotton wool W lying in the pliers unit.
  • the 1 contains a front feed cylinder 13 and a rear feed cylinder 14, which receive the cotton wool W between them.
  • the two feed cylinders 13 and 14 are rotated intermittently during operation in order to move the cotton wool W gradually in the direction of the clamping line of the forceps unit or to the front edge of the forceps plate 7.
  • the feed cylinders 13 and 14 are resiliently pressed against one another in order to bring about the necessary frictional connection between the cotton wool W and the peripheral surfaces of the feed cylinders. If desired, these circumferential surfaces can also be fluted (at least for the front feed cylinder 13) (not shown).
  • the lower jaw plate 7 carries an attachment 15 which has a cotton wedge 15.1 which extends from below against the gap between the two feed cylinders 13 and 14 in order to deflect the cotton wool W emerging from this gap forward to the front edge of the lower jaw plate 7.
  • the front feed cylinder 13 is adjustable between the operating position shown with solid lines and a threading position indicated with a dash-dotted line. In the threading position, the feed cylinder 13 is at a distance from the rear feed cylinder 14 and from the attachment 15 of the forceps plate 7, so that the beginning of a new cotton wool W can be easily pushed up to the front edge of the forceps plate 7.
  • the front feed cylinder 13 is preferably pressed with a small force against the attachment 15 of the forceps plate 7 in order to hold the cotton wool W while a fiber beard is torn off as described.
  • the feed cylinder 13 has a relatively small diameter, and it presses the cotton wool W as small as possible behind it front edge of the collet plate 7 on the attachment 15. This improves the fiber guidance when tearing; fewer uncombed tufts of fibers are torn from the wadding W.
  • FIG. 2 differs from that of FIG. 1 only in that it also contains a third feed cylinder 16 and an endless conveyor belt 17 running around the second and third feed cylinders 14 and 16, respectively.
  • the second and third feed cylinders and the conveyor belt 17 can be moved when changing the cotton wool W in order to guide the start of a new cotton wool W safely and gently - without deforming the beginning of the cotton wool - onto the attachment 15 of the pliers plate 7.
  • 3 to 9 show schematic side views of the crimper frame 6 and the bearings of the feed cylinders 13 and 14 in some different possible embodiments.
  • the bearings 13.1 of the front feed cylinder are held on both sides of the forceps unit on a swivel arm 21 which is pivotally connected to the forceps frame 6 about an axis 22.
  • the bearings 13.1 are adjusted between the operating position shown with a solid line and the rest position or threading position shown with a broken line.
  • the arms 21 are held by pivotable locking levers 23, which each press on the arms 21 via a spring 24.
  • the springs 24 resiliently press the front feed cylinder 13 (FIG. 1, 2) carried by the arms 21 against the attachment 15 of the pliers plate 7.
  • the bearings 14.1 of the rear feed cylinder are in each case in a guide connected to the pliers frame 6 on both sides of the pliers assembly 25 guided and are pressed forward by springs 26, ie against the bearings 13.1.
  • the springs 26 press the rear feed cylinder 14 (FIGS. 1, 2) resiliently against the front feed cylinder 13.
  • other devices for resilient pressing could also be used, for example hydraulic or pneumatic cylinders.
  • the two feed cylinders 13 and 14 are preferably positively coupled to one another so that they rotate at the same peripheral speeds.
  • the shafts of the two feed cylinders carry gears 13.2 or 14.2, which are in engagement with one another (when the feed cylinder 13 is in its operating position) on at least one side of the forceps unit, as indicated by broken lines.
  • the front feed cylinder 13 is preferably driven, preferably from a gear 27, which lies in front of the gear 13.2 and engages with this (or another gear carried by the shaft of the feed cylinder 13).
  • Such an arrangement has the advantage that during the movement of the cotton wool, the driving force exerted by the gear 27 on the shaft of the feed cylinder 13 and the reaction force exerted by the gear 14.2 on the gear 13.2 tend to counteract the shaft of the feed cylinder 13 against the force of the springs 24 lift something up.
  • the feed cylinder 13 then presses the cotton wool downward at most with a reduced force, so that the friction of the cotton wool on the attachment 15 of the pliers plate 7 is correspondingly reduced or eliminated.
  • the embodiment according to FIG. 4 differs from that according to FIG. 3 in that the bearings 13.1 of the front feed cylinder are not immovably connected to the swivel arms 21, but are guided displaceably in guides 28 carried by the swivel arms 21.
  • the bearings 13.1 are pressed down by springs 29 with respect to the swivel arms 21, around the front feed cylinder 13 (FIGS. 1, 2) to press resiliently against the top 15 of the collet plate 7.
  • the swivel arms 21 are locked in the operating position shown by means not shown.
  • the springs 29 could of course be replaced by hydraulic or pneumatic cylinders if desired. But they could also be left out entirely; the front feed cylinder 13 would then (in the operating position of the swivel arms 21) only rest on the cotton wool under its own weight.
  • the embodiment according to FIG. 5 differs from that according to FIG. 4 in that the swivel arms 21 are omitted.
  • the bearings 13.1 with the springs 29 are guided displaceably in guides 30 connected to the collet frame 6.
  • the guides 30 could be divided.
  • the embodiment according to FIG. 6 again has the swivel arms 21, which are locked in the operating position shown by means not shown.
  • the bearings 14.1 of the rear feed cylinder are held immovably in the tongs frame 6.
  • the swivel arms 21 carry guides 31 in which the bearings 13.1 of the front feed cylinder are held so as to be radially displaceable in all directions.
  • Tension springs 32 act on the bearings 13.1, which are each anchored to a shoulder 21.1 of the swivel arm 21 and pull the bearings 13.1 obliquely backwards and downwards.
  • the front feed cylinder 13 (FIGS. 1, 2) is pressed against the rear feed cylinder 14 with a greater force and against the attachment 15 of the collet plate 7 with a smaller force.
  • FIG. 7 corresponds to that according to FIG. 3 with the difference that the front feed cylinder 13 carried by the arms 21 is not pressed resiliently against the attachment 15 of the collet plate 7 by the springs 24 shown in FIG. 3, but instead by schematically shown as spiral springs torsion springs 33 which load the arms 21 in the counterclockwise direction according to FIG. 7. This Load counterclockwise as shown in Fig. 7.
  • These torsion springs could of course also be torsion spring bars arranged in the pivot axis 22.
  • the arrangement of the drive gear 27 in front of the gear 13.2 may not be possible.
  • the toothed segment 34 is expediently moved with the upper jaw arms 10.
  • it can be pivoted about an axis which is coaxial with the pivot axis 6 (FIG. 1) of the upper tong arms 10 and at the same time also with the pivot axis 22 of the arms 21.
  • the toothed segment 34 is connected to the adjacent upper tong arm by a pin-slot coupling, for example to a pin 35 carried by the upper tong arm 10, which extends into a slot 36 in the toothed segment 34.
  • the upper tong arm 10 is shown in FIG. 8 in the position with the tong assembly closed.
  • the gearwheel 14.2 is rotated counterclockwise.
  • the gears 13.2 and 14.2 each contain a freewheel (not shown) so that they do not turn the feed cylinders 13 and 14 backwards when the forceps unit is closed.
  • the bearings 13.1 of the front feed cylinder are guided in guides 28 as described with reference to FIG. 4 and are pressed down by springs 29 in order to press the front feed cylinder 13 (FIGS. 1, 2) resiliently against the attachment 15 of the collet plate 7.
  • a reduction in the pressure forces exerted on the shaft of the feed cylinder 13 is desirable during the movement of the cotton wool.
  • This reduction can also occur with the movement of the upper jaw arms 10 can be effected when opening the pliers unit.
  • the upper jaw arms 10 can be coupled to the bearings 13.1 of the front feed cylinder via a device 38, which exerts a tensile force on the bearing 13.1 during the opening movement of the upper jaw arm and thus counteracts the compressive force of the spring 29.
  • This device 38 consists, for example, of a cylinder articulated on the upper tong arm 10 and a piston rod articulated on the bearing 13.1, which carries a piston which is displaceable in the cylinder.
  • the interior of the cylinder is connected to the surroundings by a flow restrictor, so that a negative pressure prevails in the cylinder as long as the interior of the cylinder increases due to the opening movement of the upper tong arm.
  • Fig 9 schematically shows an embodiment which differs from the embodiment according to FIG. 8 in that the toothed segment 34 is replaced by a segment 40 which has an internal toothing 40.1 which is in engagement with the toothed wheel 13.2.
  • the segment 40 can be pivoted again, for example, about the axis 22 coaxial with the pivot axis 6 (FIG. 1) of the upper tong arms 10 and connected to the adjacent upper tong arm 10 by a pin-slot coupling.
  • the upper clamp arm 10 carries a pin 35 which extends into a slot 41 in the segment 40.
  • the upper forceps arm 10 takes the segment 40 in a clockwise direction according to FIG. 9 after an empty travel given by the slot 41, so that the internal toothing 40.1 moves the gear 13.2 in a clockwise direction turns.
  • the gears 13.2 and 14.2 each contain a freewheel so that they do not turn the feed cylinders 13 and 14 backwards when the forceps unit is closed.
  • a gear 13.2, a gear 14.2 and a segment 40 with internal teeth 40.1 can be arranged on both sides of the pliers unit.
  • the toothing 40.1 of the (or each) segment 40 could also engage with another gearwheel carried by the shaft of the front feed cylinder 13 instead of the (respective) gearwheel 13.2.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Claims (9)

  1. Agrégat de pinces pour une peigneuse, avec une partie inférieure de pince (4) avec laquelle une partie supérieure de pince (5) est reliée d'une manière mobile, avec un premier cylindre alimentaire rotatif (13) qui agit conjointement avec un deuxième cylindre alimentaire rotatif (14) voisin, à l'aide de dispositifs d'application de pression (24, 26; 29, 26; 32; 33, 26) exerçant une pression élastique d'un cylindre contre l'autre,
    caractérisé par le fait que
    le premier cylindre alimentaire (13) délimite un canal de guidage de nappe, par un élément (15) de la partie inférieure de pince (4).
  2. Agrégat de pinces selon revendication 1,
    caractérisé par le fait que
    les dispositifs d'application de pression (24, 26; 29, 26; 32; 33, 26) sont réalisés pour presser le cylindre alimentaire (13) cité en premer, également d'une manière élastique, contre ledit élément (15) de la partie inférieure de pince (4).
  3. Agrégat de pinces selon revendication 1 ou 2,
    caractérisé par le fait que
    les deux cylindres alimentaires (13, 14) sont accouplés ensemble d'une manière mécanique.
  4. Agrégat de pinces selon revendication 3,
    caractérisé par le fait que
    le cylindre alimentaire (13) cité en premier peut être entraîné.
  5. Agrégat de pinces selon revendication 4,
    caractérisé par le fait que
    le cylindre alimentaire (13) cité en premier peut être entraîné par une denture d'au moins un élément mobile (27; 40), denture qui est située sur le coté du cylindre alimentaire (13) cité en premier qui est opposé au deuxième cylindre alimentaire (14).
  6. Agrégat de pinces selon revendication 5,
    caractérisé par le fait que
    les deux cylindres alimentaires (13, 14) portent des roues dentées (13.2, 14.2) qui sont en prise l'une avec l'autre, et que l'élément mobile possédant la denture est un pignon d'entraînement (27) qui est situé sur le côté du cylindre alimentaire (13) cité en premier qui est opposé au deuxième cylindre alimentaire (14).
  7. Agrégat de pinces selon l'une des revendications 1 a 6,
    caractérisé par le fait que
    le cylindre alimentaire (13) cité en premier est maintenu par des bras oscillants (21) qui sont reliés d'une manière oscillante avec la partie inférieure de pince (4).
  8. Agrégat de pinces selon l'une des revendications 1 à 7,
    caractérisé par le fait que
    la partie inférieure de pince (4) possède une cale de guidage de nappe (15.1) qui s'étend dans le creux situé entre les deux cylindres alimentaires (13, 14).
  9. Agrégat de pinces selon l'une des revendications 1 à 8,
    caractérisé par
    un troisième cylindre alimentaire rotatif (16), et une bande sans fin de transport (17) circulant autour du deuxième et du troisième cylindre alimentaire (14, 16).
EP19910113204 1990-08-20 1991-08-06 Dispositif de pincage pour une machine de peignage Expired - Lifetime EP0481181B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2695/90 1990-08-20
CH269590A CH681629A5 (fr) 1990-08-20 1990-08-20

Publications (2)

Publication Number Publication Date
EP0481181A1 EP0481181A1 (fr) 1992-04-22
EP0481181B1 true EP0481181B1 (fr) 1995-05-17

Family

ID=4239510

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910113204 Expired - Lifetime EP0481181B1 (fr) 1990-08-20 1991-08-06 Dispositif de pincage pour une machine de peignage

Country Status (3)

Country Link
EP (1) EP0481181B1 (fr)
CH (1) CH681629A5 (fr)
DE (1) DE59105510D1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH685563A5 (de) * 1992-07-14 1995-08-15 Rieter Ag Maschf Zangenaggregat für eine Kämmaschine.
CH686675A5 (de) * 1993-03-12 1996-05-31 Rieter Ag Maschf Klemmstelle fuer Watte.
DE19640482A1 (de) * 1996-09-30 1998-04-02 Chemnitzer Spinnereimaschinen Zangenapparat für Kämmaschinen mit Rundkammwalze und lagestabilen Abreißwalzen
CH699286A2 (de) * 2008-07-31 2010-02-15 Rieter Ag Maschf Kämmvorrichtung zum Kämmen eines Fasermaterials.
JP5853994B2 (ja) * 2013-05-30 2016-02-09 株式会社豊田自動織機 コーマ

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE243062C (fr) *
DE491671C (de) * 1927-03-01 1930-02-13 John William Nasmith Flachkaemmaschine
FR1014903A (fr) * 1950-03-21 1952-08-25 Alsacienne Constr Meca Dispositif d'alimentation de machines textiles, en particulier de peigneuses
FR1305461A (fr) * 1961-07-21 1962-10-05 Schlumberger Cie N Perfectionnement aux dispositifs de sortie de peigneuses rectilignes et machines textiles analogues
DE2538259B2 (de) * 1975-08-28 1977-12-08 Skf Kugellagerfabriken Gmbh, 8720 Schweinfurt Faserband-speiseeinrichtungen fuer offen-end-spinneinheiten

Also Published As

Publication number Publication date
DE59105510D1 (de) 1995-06-22
CH681629A5 (fr) 1993-04-30
EP0481181A1 (fr) 1992-04-22

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