US3610294A - Weft-inserting rod drive for shuttleless looms - Google Patents

Weft-inserting rod drive for shuttleless looms Download PDF

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Publication number
US3610294A
US3610294A US868252*A US3610294DA US3610294A US 3610294 A US3610294 A US 3610294A US 3610294D A US3610294D A US 3610294DA US 3610294 A US3610294 A US 3610294A
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US
United States
Prior art keywords
gear
lay
crank arm
weft
shaft
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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
Application number
US868252*A
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English (en)
Inventor
Heinz Maassen
Hans Dieter Gaidies
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.)
Jean Guesken Maschinenfabrik Eisengiesserei
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Jean Guesken Maschinenfabrik Eisengiesserei
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Publication of US3610294A publication Critical patent/US3610294A/en
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Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/275—Drive mechanisms

Definitions

  • a gear fixed on the lay drives a further gear, by means of a toothed belt.
  • the first gear is connected to a crank arm in which the second gear is rotatably mounted.
  • a lever arm fixedly connected to the second gear is pivotally connected to the weft-inserting rod.
  • the present invention relates to a drive for the weft-inserting rods in shuttleless looms. It was customary heretofore to provide the drive of the weft-inserting rods by means of curvecontrolled lever systems with oscillating lever arms. A particular difficulty always arose in connection with the passage or transfer of the gripper rod drive from stationary driving means to the gripper rods which oscillate together with the reed. It is the object of the present invention to provide a gear system which is as simple as possible and wherein the driving movement is transferred as a rotary movement to the driving elements oscillating with the reed.
  • this object is obtained by means and with the aid of a cycloid gear for the rectilinear guide of the weft-inserting rods which is mounted on the reed, and by means of a dual-crank gear for driving the cycloid gear, which rotates around a locally stationary center of rotation.
  • weft-inserting rods must be disposed outside the shed for a very specific period of time in order to receive the weft yarn or thread. Yet coordinated to this required period of time, according to the sine function, is a curvature with a great amplitude; in other words, the weft-inserting rods must swing out very far toward the sides. In order that a swinging motion or deflection of such an amount and extend be not required, and in order to save space, it is necessary to operate with a nonuniform rotary movement as drive movement for the weft inserting rods.
  • crank gears produce a nonuniform secondary drive movement, they unfortunately also have the disadvantage that a technically usable simple crank gear has, on the one hand, a relatively slow secondary driving speed in a specific angular range within which the weft inserters would have to be disposed outside of the shed, but on the other hand, there is an increased speed in another range which, in the present case, would be effective at the moment when the thread is being transferred in the center of the shed where a slow inserter speed is desirable in order to assure a safe transfer, and this requirement exists also with regard to the other extreme position thereof.
  • a preferred embodiment of the present invention includes a dual-crank gear coupled to a cycloid gear in a rotary angle position such that the slowest rotary speed of the latter is produced in the extended position of the weft-inserting rods, and during the oscillating movement with the reed, the driven shaft of the dual crank gear extends toward both sides through the vertical plane extending through the center of rotation and is parallel to the reed.
  • FIG. 1 is a perspective view of the weft-inserting rod drive according to the present invention for the right-hand side weft-inserting rod of a shuttleless loom;
  • FIG. 2 is a schematic illustration of the moving conditions of the driving elements according to FIG. I.
  • FIG. 3 is a diagram of the weft-inserting rod path as a function of time, and of the position of the operating crank.
  • the numeral 1 indicates the lay or beat-up shaft on which is mounted the arm 2 carrying the lay 3 and the reed '25.
  • the arm 2 is oscillated by the crank 26 on the continuously rotating loom shaft 4.
  • a gear 6 fixed on the shaft 4 drives a toothed belt 7 which connects a gear 8 fixed on the shaft 9, for driving the same.
  • the shaft 9 extends into a gear box 10 fixedly mounted on the loom frame.
  • the output shaft 1] of the gear box 10 is substantially normal to the shaft 9, vertical as shown, and has an arm 12 fixed at one end thereon.
  • the drive ratio is such that the arm 12 rotates about the axis of the shaft 11 at a speed corresponding to the angular velocity of the shaft 4.
  • An adjustable link 13 pivotally connects the other end of the arm 12 to a pivot 27 adjacent one end of an oscillating arm 14. Adjacent the other end of the am 14 there is fixedly mounted a stub shaft 15.
  • the stub shaft 15 passes through a suitable opening on the lay 3, and has one end of an arm 16 fixed thereon.
  • the arm 16 and a gear 18, which is fixedly secured to lay 3 and through which the stub shaft 15 passes, are components of the cycloid gear which partakes of the motion of the lay 3.
  • the cycloid gear further includes an arm 17 fixed at one end on the pivot 21 at the other end of the arm 16. The other end of the arm 17 is pivotally connected at 28 to the weft-inserting rod 5.;On the pivot 21 there is also fixedly mounted a gear 19 which is connected by a suitable toothed belt 20 to the gear 18.
  • arms 14 and 16 are fixed on shaft 15 which is rotatably mounted in the lay 3, to which, in turn, gear 18 is fixedly attached.
  • Arm 17 is fixedly mounted on pivot 21 which is rotatably mounted in arm 16 and has gear 19 fixed thereto. Arm 17 is also pivotally connected to the weft-inserting rod 5.
  • FIG. 2 shows diagrammatically the elements of the structure shown in FIG. 1, and the lines representing the elements have the same numerals as the corresponding elements.
  • the crank arm 12 rotates about the axis of the shaft 11 as indicated by the arrow A.
  • Crank arms I2, 13 and 14 and cycloid gears 16, 17, 18 and 19 are shown in the position wherein the right-hand weft-inserting rod is in approximately its outermost position as shown in FIG. 1.
  • the rotation of the crank arm 12 imparts a rotatable movement to the crank arm 14.
  • This crank arm 14 rotates the crank arm 16 and, as a result, the gear 18, stationary with respect to lay 3, drives by means of the belt 20, the gear 19, the pivot 21 and the crank arm 17, whereby the gear 19 rotates in a direction opposite that of the gear 18.
  • the movement of the weft-inserting rod 5 is slowest at the points in FIGS. 1 and 2 when the weft-inserting rod is withdrawn from the shed, or is about to be inserted in the shed.
  • the motion speeds up and then slows as the weft inserter approaches the middle of the shed for transfer of the weft to to other weft inserters.
  • the center of the fabric is indicated by the symbol M, and the selvage is indicated by the symbol K.
  • the positions of the weft rod tip or eye are also shown in FIG. 3 with respect to the angle of rotation of the crankshaft 4, and of the shaft 11 and crank arm 12.
  • the full line portion of the curve represents the motion of the weft-inserting rods as actually obtained by use of the drive described herein.
  • a sine curve is shown in dashed lines which corresponds to an angular rotation of 120 during which the weft rods are outside the shed.
  • the lay 3 were to remain stationary, the angular velocity of the crank arm 14 and of the arm 16 within the range of the laterally extended position of the rods 5, would be less than the angular velocity of the crank arm 12 with respect to the center of rotation of the shaft 11. Otherwise, the crank arm 14 would cause the angular velocity of the arm 16 at the time of transfer of the weft to be greater than that of the crank arm 12. This would be a less favorable condition for the transfer of the weft than in the case of the uniform drive of the cycloid gear 18 at the constant speed of the crank arm 12. From the position shown in FIG. 2, the lay 3 moves slightly forward in the direction of the arrow C before the weft is cast on or picked up by the inserter rods 5.
  • a rectilinear driving means for weft-inserting rods in shuttleless looms including a reciprocating lay, a continuously rotating stub shaft rotatably mounted in the lay, a first gear fixed on said lay and traversed by said stub shaft, a crank arm fixed on one end of said stub shaft, a second gear rotatably mounted on said crank arm, a lever arm connected to said second gear, said lever arm being pivotally connected to a weft-inserting rod, a driving connection between said first and second gears having a ratio of 2:1, a loom shaft, a continuously rotating shaft driven from the loom shaft and rotating about a stationary axis which is in a plane substantially parallel with the axis of said stub shaft, said lay moving the axis of said stub shaft relative to said stationary axis, a second crank arm on said stub shaft, a crank am on said driven shaft and a link connecting said last-mentioned crank arm with said second crank arm.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US868252*A 1967-01-11 1969-05-19 Weft-inserting rod drive for shuttleless looms Expired - Lifetime US3610294A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEG0048958 1967-01-11

Publications (1)

Publication Number Publication Date
US3610294A true US3610294A (en) 1971-10-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
US868252*A Expired - Lifetime US3610294A (en) 1967-01-11 1969-05-19 Weft-inserting rod drive for shuttleless looms

Country Status (6)

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US (1) US3610294A (de)
BE (1) BE709231A (de)
DE (1) DE1710249B1 (de)
ES (1) ES348113A1 (de)
FR (1) FR1564534A (de)
GB (1) GB1219642A (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3735783A (en) * 1970-10-26 1973-05-29 F Gabler Drive means for weft inserting apparatus for a loom
US3884275A (en) * 1972-11-13 1975-05-20 Anselmo Bolea Camprubi Devices for the actuation of lances in looms without shuttles
US3951178A (en) * 1974-12-13 1976-04-20 Cox Foundry And Machine Co. Shuttleless loom
US3955603A (en) * 1973-08-23 1976-05-11 Societe Alsacienne De Constructions Mecaniques De Mulhouse Looms provided with means for making movement thereof uniform
US3972355A (en) * 1975-06-13 1976-08-03 Cox Foundry & Machine Company Weft inserting driving means for a shuttleless loom
US3999580A (en) * 1975-06-26 1976-12-28 Cox Foundry & Machine Company Weft inserting rapier guide mechanism for a shuttleless loom
US4041991A (en) * 1975-06-24 1977-08-16 Control Drug, Inc. Weaving machine with external weft supply
US4984609A (en) * 1986-11-28 1991-01-15 N.V. Michel Van De Wiele Planetary gripper bar drive with adjustable crank and lever arm lengths

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2844852C2 (de) * 1978-10-14 1986-01-23 Jean Güsken GmbH & Co KG, 4060 Viersen Greiferstangenantrieb für Webmaschinen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1957024A (en) * 1931-05-17 1934-05-01 Emil Jaeger Weft mechanism for positive motion looms
US3335760A (en) * 1964-06-26 1967-08-15 Scheffel Walter Gripper looms
US3386477A (en) * 1965-03-27 1968-06-04 Durand Marcel Hydraulic drive means for the weft inserting means in needle loom

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE872327C (de) * 1950-07-13 1953-03-30 Raymond Dewas Antriebsvorrichtung fuer koetzerlose Eintragnadeln von Webstuehlen
DE918560C (de) * 1952-12-04 1954-09-30 Otto Jansen Einrichtung zum Hinundherbwegen der den Rutenschlitten bewegenden Doppelkurbel an Rutenwebstuehlen
FR1341916A (fr) * 1962-12-20 1963-11-02 Jean Guesken Maschinenfabrik E Dispositif d'entraînement de tissu pour métiers sans navette et métier pourvu d'un dispositif conforme au précédent

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1957024A (en) * 1931-05-17 1934-05-01 Emil Jaeger Weft mechanism for positive motion looms
US3335760A (en) * 1964-06-26 1967-08-15 Scheffel Walter Gripper looms
US3386477A (en) * 1965-03-27 1968-06-04 Durand Marcel Hydraulic drive means for the weft inserting means in needle loom

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3735783A (en) * 1970-10-26 1973-05-29 F Gabler Drive means for weft inserting apparatus for a loom
US3884275A (en) * 1972-11-13 1975-05-20 Anselmo Bolea Camprubi Devices for the actuation of lances in looms without shuttles
US3955603A (en) * 1973-08-23 1976-05-11 Societe Alsacienne De Constructions Mecaniques De Mulhouse Looms provided with means for making movement thereof uniform
US3951178A (en) * 1974-12-13 1976-04-20 Cox Foundry And Machine Co. Shuttleless loom
US3972355A (en) * 1975-06-13 1976-08-03 Cox Foundry & Machine Company Weft inserting driving means for a shuttleless loom
US4041991A (en) * 1975-06-24 1977-08-16 Control Drug, Inc. Weaving machine with external weft supply
US3999580A (en) * 1975-06-26 1976-12-28 Cox Foundry & Machine Company Weft inserting rapier guide mechanism for a shuttleless loom
US4984609A (en) * 1986-11-28 1991-01-15 N.V. Michel Van De Wiele Planetary gripper bar drive with adjustable crank and lever arm lengths

Also Published As

Publication number Publication date
ES348113A1 (es) 1969-03-01
GB1219642A (en) 1971-01-20
DE1710249B1 (de) 1972-05-31
BE709231A (de) 1968-05-16
FR1564534A (de) 1969-04-25

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