EP0481181A1 - 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
EP0481181A1
EP0481181A1 EP91113204A EP91113204A EP0481181A1 EP 0481181 A1 EP0481181 A1 EP 0481181A1 EP 91113204 A EP91113204 A EP 91113204A EP 91113204 A EP91113204 A EP 91113204A EP 0481181 A1 EP0481181 A1 EP 0481181A1
Authority
EP
European Patent Office
Prior art keywords
feed cylinder
feed
pliers
forceps
nipper
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.)
Granted
Application number
EP91113204A
Other languages
German (de)
English (en)
Other versions
EP0481181B1 (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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP0481181A1 publication Critical patent/EP0481181A1/fr
Application granted granted Critical
Publication of EP0481181B1 publication Critical patent/EP0481181B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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, and with a rotatable feed cylinder which, together with an element of the forceps lower part, delimits a cotton guide channel.
  • 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 clamp line of the forceps unit.
  • the generally fluted feed cylinder 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 object of the invention is to design the forceps unit specified at the outset in such a way that fiber displacements in the wadding can be avoided even with relatively thick wadding, without the diameter of the feed cylinder having to be enlarged for this purpose. Rather, 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 deflect this wool at a short distance behind the clamping line while a combed fiber beard is torn off from the cotton wool lying in the forceps unit and to lead in the mentioned cotton guide channel.
  • the fiber guidance can thus be improved; less 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 tongs unit according to the invention is characterized by a second rotatable feed cylinder arranged adjacent to the feed cylinder and pressing means for resiliently pressing the two feed cylinders against one another.
  • 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 operated between an operating position in which the two feed cylinders are resiliently pressed against one another and a rest position in Distance from the other feed cylinder and from said element of the lower part of the tongs can be moved.
  • the first-mentioned feed cylinder can 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 against the gap between the two feed cylinders in order to direct 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.
  • the lower part 4 of pliers essentially consists of a lower pliers frame 6 and a lower pliers plate carried by the latter 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 part 5 of the pliers 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 unit is closed, between the front edge of the lower pliers plate te 7 and the lower edge of the top 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 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 onto the attachment 15 as close as possible behind the front edge of the forceps plate 7. This improves the fiber guidance when tearing off; fewer uncombed tufts of fibers are torn from the wadding W.
  • FIG. 2 differs from that according to 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 deformation of the cotton wool beginning - onto the attachment 15 of the pliers plate 7.
  • 3 to 9 show schematic side views of the tong 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 out and are by springs 26 forward, ie pressed against the bearings 13.1.
  • the springs 26 resiliently press the rear feed cylinder 14 (Figs. 1, 2) against the front feed cylinder 13.
  • other means for resilient pressing could be used, e.g. 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, at least on one side of the forceps unit, as indicated by broken lines, gear wheels 13.2 or 14.2 which are in engagement with one another (when the feed cylinder 13 is in its operating position).
  • 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 lift the shaft of the feed cylinder 13 slightly upwards against the force of the springs 24.
  • the feed cylinder 13 then presses the cotton wool downward at most with 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 in order to resiliently press the front feed cylinder 13 (FIGS. 1, 2) against the attachment 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) rest only 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. Characterized the front feed cylinder 13 (Fig. 1, 2) is pressed with a greater force against the rear feed cylinder 14 and with a smaller force against the attachment 15 of the collet plate 7.
  • 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 resiliently pressed against the attachment 15 of the collet plate 7 by the springs 24 shown in FIG. 3, but instead by schematically shown as coil springs torsion springs 33 which load the arms 21 in the counterclockwise direction according to FIG. 7. Load them 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 when the tong unit is closed.
  • the upper pliers arm takes the toothed segment 34 in a clockwise direction according to FIG. 8 after a short free travel, so that 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 be brought about by the movement of the upper tong arms 10 when the tong assembly is opened.
  • 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 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 internal teeth 40.1 , which is in engagement with the gear 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 rotates the gear 13.2 in a clockwise direction.
  • 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 pliers 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 assembly.
  • 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)
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 true EP0481181A1 (fr) 1992-04-22
EP0481181B1 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

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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0615009A1 (fr) * 1993-03-12 1994-09-14 Maschinenfabrik Rieter Ag Dispositif de pincage pour ouate
WO2010012113A1 (fr) * 2008-07-31 2010-02-04 Maschinenfabrik Rieter Ag Dispositif de peignage destiné à une matière fibreuse
CN104213259A (zh) * 2013-05-30 2014-12-17 株式会社丰田自动织机 精梳机

Families Citing this family (2)

* 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.
DE19640482A1 (de) * 1996-09-30 1998-04-02 Chemnitzer Spinnereimaschinen Zangenapparat für Kämmaschinen mit Rundkammwalze und lagestabilen Abreißwalzen

Citations (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
DE868865C (de) * 1950-03-21 1953-03-02 Alsacienne Constr Meca Speisevorrichtung fuer Textilmaschinen, insbesondere Kaemmaschinen
FR1305461A (fr) * 1961-07-21 1962-10-05 Schlumberger Cie N Perfectionnement aux dispositifs de sortie de peigneuses rectilignes et machines textiles analogues
DE2538259A1 (de) * 1975-08-28 1977-03-03 Skf Kugellagerfabriken Gmbh Faserband-speiseeinrichtungen fuer offen-end-spinneinheiten

Patent Citations (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
DE868865C (de) * 1950-03-21 1953-03-02 Alsacienne Constr Meca Speisevorrichtung fuer Textilmaschinen, insbesondere Kaemmaschinen
FR1305461A (fr) * 1961-07-21 1962-10-05 Schlumberger Cie N Perfectionnement aux dispositifs de sortie de peigneuses rectilignes et machines textiles analogues
DE2538259A1 (de) * 1975-08-28 1977-03-03 Skf Kugellagerfabriken Gmbh Faserband-speiseeinrichtungen fuer offen-end-spinneinheiten

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0615009A1 (fr) * 1993-03-12 1994-09-14 Maschinenfabrik Rieter Ag Dispositif de pincage pour ouate
CN1043909C (zh) * 1993-03-12 1999-06-30 里特机械公司 棉卷的供入方法及其设备
WO2010012113A1 (fr) * 2008-07-31 2010-02-04 Maschinenfabrik Rieter Ag Dispositif de peignage destiné à une matière fibreuse
CN102112669B (zh) * 2008-07-31 2012-03-21 里特机械公司 用于精梳纤维材料的精梳装置
CN104213259A (zh) * 2013-05-30 2014-12-17 株式会社丰田自动织机 精梳机
CN104213259B (zh) * 2013-05-30 2016-09-21 株式会社丰田自动织机 精梳机

Also Published As

Publication number Publication date
DE59105510D1 (de) 1995-06-22
EP0481181B1 (fr) 1995-05-17
CH681629A5 (fr) 1993-04-30

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