US3562865A - Nipper mechanism for textile combing machines - Google Patents

Nipper mechanism for textile combing machines Download PDF

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Publication number
US3562865A
US3562865A US759347A US3562865DA US3562865A US 3562865 A US3562865 A US 3562865A US 759347 A US759347 A US 759347A US 3562865D A US3562865D A US 3562865DA US 3562865 A US3562865 A US 3562865A
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United States
Prior art keywords
nipper
point
closure
curve
nippers
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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
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US759347A
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English (en)
Inventor
Hansulrich Eichenberger
Peter Schwengeler
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Maschinenfabrik Rieter AG
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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.)
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Publication date
Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
    • E04F11/02—Stairways; Layouts thereof
    • E04F11/104—Treads
    • E04F11/108—Treads of wood or with an upper layer of wood
    • 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F11/00—Stairways, ramps, or like structures; Balustrades; Handrails
    • E04F11/02—Stairways; Layouts thereof
    • E04F11/104—Treads
    • E04F2011/1046—Miscellaneous features of treads not otherwise provided for
    • E04F2011/1047—Miscellaneous features of treads not otherwise provided for with means for eliminating squeak

Definitions

  • the top nipper is pivotally mounted on the bottom nipper and is closed on the bottom nipper by the action of a spring loaded rocker arm.
  • the rocker arm is pivoted at its two ends so that the forward pivot point on the top nipper describes a closure curve by which the nippers are decelerated towards their point of closure during operation of the mechanism.
  • This invention relates to a nipper mechanism for a textile combing machine. More particularly, this invention relates to a nipper mechanism wherein the closing movements of the top and bottom nippers are controlled by a linkage system.
  • Combing machines are best operated with a large number of opening and closing movements in order to obtain a relatively high throughput.
  • conventional types of combing machines for combing textile bers have had oscillating nipper mechanisms Iwhich allow only a limited number of opening and closing movements to be completed during a combing operation. That is, because of the considerable moving mass of the oscillating nippers and of the violent sudden closure at the closing point of the top and bottom nippers of the nipper mechanism, optionally mounted for rotation one above the other, the combing machines have been subjected to considerable vibration and knocking during combing above certain speeds.
  • a known nipper mechanism which is provided with rocking nippers comprises a bottom nipper arranged on nipper arms and connected through an arm to an oscillatable drive shaft for reciprocating said bottom nipper in response to oscillation of the drive shaft and a top nipper being arranged on corresponding nipper arms being pivotably connected to the bottom nipper.
  • the closing movement is imparted to the top nipper through a spring-loaded rocker arm fixed to lCe the machine frame, the arrangement being such that the spring-loaded rocker arm is so mounted as to swing freely about the axis of the oscillating drive shaft by which it is directly supported.
  • the rear pivot of the spring support system coincides with the center of the nipper drive spindle in a structure known kinematically as a four-bar linkage.
  • the front pivot of this spring support system thus describes, during reciprocation, a curve which approaches the closure point of the nippers at a comparatively large angle to the curve which corresponds to the curve described by the front pivot of the spring support system with the nippers permanently closed.
  • the top and bottom nippers when closed have developed a comparatively high speed by the time they reach the closure point, resulting in a sudden, violent closure of the nippers.
  • the invention provides a nipper mechanism for combing machines ⁇ which includes a bottom nipper arranged on nipper arms and reciprocable with a top nipper by means of an arm fixed to an oscillating drive shaft.
  • the top nipper is further arranged on corresponding nipper arms pivotally mounted on the bottom nipper.
  • the closing movement of the top nipper ⁇ with respect to the bottom nipper is imparted through a spring-load rocker arm which is pivotable at two points; the rear pivot point, as seen in the direction in which a fleece is drawn off, being geometrically arranged in such a way that, during reciprocatory rocking movement, the front pivot point describes a closure curve in which the nippers are decelerated towards their point of closure.
  • the nipper mechanism may also have a counterbalance system that is in equilibrium both with the closing movement and with the moving mass of the nippers.
  • FIG. l illustrates a section through a nipper mechanism according to the invention in the open position
  • FIG. 2 illustrates a section through the nipper mechanism of FIG. 1 in the closed position
  • FIG. 3 diagrammatically illustrates a four-bar linkage of the nipper mechanism.
  • the nipper mechanism is arranged on both sides, i.e. to the left and right, of a top nipper 1 and bottom nipper 4.
  • the top nipper 1 is pivotally mounted at point A by a top nipper arm 2 on a bottom nipper arm 3 of the bottom nipper 4.
  • the bottom nipper 4 is pivotably connected at point B through an arm 5 to a crank lever 6 which in turn is fixed on an oscillatable nipper drive shaft 7.
  • the front end of the bottom nipper is, at the front end near the tuft outlet position, pivotably connected at the point C to an arm 9 rockable about a comb segment 15 of a combing cylinder 1S arranged so as to rotate freely on a circular comb shaft 8 as known per se.
  • a spring loaded rocker arm 10 is pivotably connected to each of the top nipper arms 2 (only one is shown) at point D.
  • the arm 10 consists of a rod 12 pivoted at point D on the rear end of the nipper arm 2 of the top nipper 1 and at point E on a link 13 which may be in the form of a forked lever. Additionally at the point E the rod 12 is arranged slidably (not shown) in the direction of its longitudinal axis.
  • the rod 12 is kept in its end position at the point E by an elastic pressure member 11 which is at its front end xedly mounted on the rod 12 and at its rear end supported on the link 13 pressing the rod 12 off from the link 13.
  • Pivoted to the link 13 at point F is a crank lever 14 which in turn is fixed to the nipper drive spindle 7 in which point B represents the center.
  • a counterbalance 17 is rotatably supported on the link 13 through an arm 16 at point G.
  • the counterbalance 17 is so arranged as to pivot about the point I with its center of gravity H and is connected to the nipper drive spindle 7 through an arm 18 having a front pivot K and a rear pivot L and through a crank lever 19.
  • the link 13 establishes a connection between the nipper drive spindle 7 and the spring-loaded rocker arm 10 and between the top nipper 1 and the counterbalance 17.
  • a reciprocating movement generated by the nipper drive spindle 7 through the cranks levers 14 and 6 and transmitted by means of the link 13 and arm to the nipper assembly displaces the center of gravity M of the nipper assembly (which does not coincide with the pivot D) in the opposite direction to the corresponding movement of the center of gravity H of the counterbalance 17 to which the reciprocating movement generated by the nipper drive spindle 7 is transmitted by way of the crank lever 19 and the arm 18.
  • the nipper mechanism incorporates in addition to the structure known kinematically as a fourbar linkage, with the displaceable pivots C and B and the xed points and another structure known kinematically as a four-bar linkage with the diplaceable pivots F and G and the xed pivots and
  • the latter fourbar linkage is connected to the rst four-bar linkage through the nipper drive spindle 7 and is in the form of a parallel crank drive, for example, consisting of the arm 16, the crank lever 14 and the link 13.
  • the coupling curve Kk generated by the reciprocation of the rear pivot E may have a trend which is governed by the choice, adapted to the circumstances prevailing, of the geometric arrangement of the rear pivot E in regard to the spindle center and the front pivot D, and may, for example, show a trend between E and In the case of the front pivot D of the spring-loaded rocker arm 10, the coupling curve of such follows a closure curve path Ks, which leads to closure of the nippers.
  • the coupling curve Kk is thus the deciding factor in the movement of the pivot D along the path of the closure curve Ks which approaches a curve Kt which the pivot D would describe if the nippers were permanently closed, and meets the curve Kt at an intersection which is the nipper closure-point N.
  • point D moves at decreasing speed towards the nipper closure point N in accordance with the decreasing gradient of the closure curve Ks during reciprocation of the link 13 in accordance with the coupling curve Kk, and may then move beyond point N on the curve Kt in order, after reaching a dead position O, to return to its end position in the opposite direction via point N.
  • the angle at which the closure curve Ks and the curve Kt intersect towards the point N at which the nippers close determines whether closure is violent or smooth and corresponds to the angle formed by the tangent applied to the closure curve Ks and the curve Kt at the closure 4 point N of the nippers.
  • This angle formed by the two tangents preferably amounts to 15 at the most.
  • displaceable pivot point G will move along a path P in accordance with the coupling curve Kk and since the nipper drive spindle 7 simultaneously drives the link 13 and the counterbalance 17 through the arm 18, the counterbalance 17 will be rotated about point I in an oppositely directed movement to front pivot point D and hence oppositely to the oscillation of the top nipper 1.
  • the nipper mechanism is shown in FIG. 1 in the open position at the point of reversal corresponding to point D in FIG. 3 and thus represents one extreme of the movement of the nipper assembly swinging back and forth in equilibrium with the counterbalance 17.
  • the nipper assembly and counterbalance 17 are at the greatest distance apart from one another and are kept in balance by way of the nipper drive spindle 7.
  • FIG. 2 and the nipper mechanism is shown in its closed position at the rear point of reversal corresponding to point O in FIG. 3, and thus represents another extreme of the movement of the nipper assembly swinging back and forth in equilibrium with the counterbalance 17.
  • Nipper assembly, and counterbalance 17 are at the narrowest distance apart from one another and are kept in balance by way of the nipper drive spindle 7.
  • FIG. 3 Another extreme of the movement of the nipper assembly swinging back and forth in equilibrium with the counterbalance 7 is shown in FIG. 3 in which the position of the top nipper at the closure point N and the corresponding position of the counterbalance 17 are shown in chain lines.
  • a nipper mechanism for textile combing machines comprising an oscillatable drive shaft
  • bottom nipper arms having a bottom nipper thereon;
  • first means securing said bottom nipper arms to said drive shaft for reciprocating said bottom nipper in response to oscillation of said drive shaft;
  • top nipper arms pivotably connected to said bottom nipper arms and including a top nipper at one end for reciprocation with said bottom nipper;
  • a spring-loaded rocker arm pivotably connected at one end to said top nipper arms
  • a counterbalance for the moving mass of said nippers connected to said link means whereby during reciprocatory rocking movement the arrangement of the rocker arm with said link means connected with said counterbalance allows the pivot point of said rocker arm with said top nipper arms to move on a closure curve by which said nippers are decelerated towards each other upon closure and said nippers close in a gentle manner.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Textile Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Steps, Ramps, And Handrails (AREA)
US759347A 1967-09-27 1968-09-12 Nipper mechanism for textile combing machines Expired - Lifetime US3562865A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEM0075683 1967-09-27

Publications (1)

Publication Number Publication Date
US3562865A true US3562865A (en) 1971-02-16

Family

ID=7316511

Family Applications (1)

Application Number Title Priority Date Filing Date
US759347A Expired - Lifetime US3562865A (en) 1967-09-27 1968-09-12 Nipper mechanism for textile combing machines

Country Status (5)

Country Link
US (1) US3562865A (fr)
CH (1) CH471910A (fr)
DE (2) DE1683291A1 (fr)
FR (1) FR1562179A (fr)
GB (1) GB1222436A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008104315A1 (fr) * 2007-03-01 2008-09-04 Oerlikon Textile Gmbh & Co. Kg Peigneuse comportant un mécanisme de pince oscillant
CN101041913B (zh) * 2006-03-22 2010-09-01 里特机械公司 精梳机钳板轴上的质量补偿
EP2400048A3 (fr) * 2010-06-22 2015-01-21 Kabushiki Kaisha Toyota Jidoshokki Peigneuse

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD138999B1 (de) * 1978-10-24 1980-11-26 Manfred Welker Flachkaemmaschine
JPS6215330A (ja) * 1985-07-13 1987-01-23 Hara Shiyokuki Seisakusho:Kk コ−マのニツパフレ−ムの揺動方法および装置
DE8713770U1 (de) * 1987-10-14 1987-12-03 Bierwirth, Horst, 3509 Morschen Profil zur Renovierung einer Treppenstufe
DE4216485A1 (de) * 1992-05-19 1993-11-25 Rieter Ag Maschf Kämmaschine
JPH0734332A (ja) * 1993-07-21 1995-02-03 Hara Shiyokuki Seisakusho:Kk コーマにおけるニッパフレームの揺動方法及び装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101041913B (zh) * 2006-03-22 2010-09-01 里特机械公司 精梳机钳板轴上的质量补偿
WO2008104315A1 (fr) * 2007-03-01 2008-09-04 Oerlikon Textile Gmbh & Co. Kg Peigneuse comportant un mécanisme de pince oscillant
EP2400048A3 (fr) * 2010-06-22 2015-01-21 Kabushiki Kaisha Toyota Jidoshokki Peigneuse

Also Published As

Publication number Publication date
DE1683291A1 (de) 1969-11-06
CH471910A (de) 1969-04-30
DE1685574A1 (de) 1971-08-12
DE1685574C3 (de) 1975-12-18
DE1685574B2 (de) 1975-05-15
FR1562179A (fr) 1969-02-24
GB1222436A (en) 1971-02-10

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