US3916957A - Tape drive in weaving machines - Google Patents

Tape drive in weaving machines Download PDF

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Publication number
US3916957A
US3916957A US496907A US49690774A US3916957A US 3916957 A US3916957 A US 3916957A US 496907 A US496907 A US 496907A US 49690774 A US49690774 A US 49690774A US 3916957 A US3916957 A US 3916957A
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United States
Prior art keywords
strip
wheel
weaving machine
machine according
auxiliary
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Expired - Lifetime
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US496907A
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English (en)
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Raymond Dewas
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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
    • D03D47/276—Details or arrangement of sprocket wheels
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18888—Reciprocating to or from oscillating
    • Y10T74/18976—Rack and pinion

Definitions

  • This invention relates to weaving machines with weft supply by spools located outside the shed. These machines comprise, for the insertion of the weft, either a single weft picker, or weft needle, which conducts the weft over the entire width of the shed, or two opposite weft pickers or needles, one of which conducts the weft to the middle of the shed, which weft is taken up and drawn by the other as far as the selvedge.
  • the needles are generally composed of two elements: a flexible strip and a front section, generally rigid, and comprising a needle body and a head, the needle body being fixed along its lower face to the forward portion of the strip.
  • the strip edges are engaged in rectilinear slideways and, for dimensional reasons, the strip passes through a hoop which conducts it inside, to the lower part of the machine.
  • the strip To drive the strip, it is provided with perforations designed to mesh in with the teeth of a drive wheel to which a power source imparts an alternating rotation movement.
  • the drive wheel should, to meet these operating conditions, revolve increasingly fast.
  • An object of this invention is to supply a weaving machine, of the type indicated, which does not offer the drawbacks mentioned.
  • the weaving machine comprising at least an inserter, or weft picker, comprising a flexible strip with perforations for its drive engagment by meshing with a toothed driving wheel designed to be driven along an alternating rotation movement
  • the weaving machine is characterized by the fact that it comprises at least one auxiliary idle wheel, comprising on the one hand means to bear on the face of the strip remote from the driving wheel axis, in the cooperation zone between the strip and the driving wheel, so as to prevent the strip being separated from the driving wheel axis, and on the other hand meshing means provided on its circumference and adapted so that, in said cooperation zone, a rotation movement is imparted to it by that of the driving wheel.
  • the bearing means are composed of at least one revolution surface whose axis is that of the auxiliary wheel and which is continuous or not.
  • This revolution surface is cylindrical or conical depending as to whether the plane of the auxiliary wheel is perpendicular or inclined with respect to the strip plane, respectively.
  • the auxiliary wheels meshing means are composed of teeth which mesh either directly with the top of the driving wheel teeth which pass through the strip, or with the perforations of the strip, itself driven by the driving wheel.
  • auxiliary wheel which cooperates with the strip and is more or less tangent to the driving wheel.
  • auxiliary wheels which cooperate with the strip/on either side of the center of the zone in which the strip cooperates with the driving wheel.
  • FIG. 1 is an elevation, partially in cross-section along line I-I of FIG. 3, showing the driving wheel, the strip and the auxiliary wheel, according to a first embodiment of the invention
  • FIG. 2 is a section along line IIII of FIGVI;
  • FIG. 3 is a plan view of the strip employed in the embodiment shown in FIGS. 1 and 2; t
  • FIG. 4 is an elevation, partially in cross-section along line IVIV of FIG. 6 and partially broken away, show.- ing the driving wheel, the strip and the auxiliary wheel, according to a secondembodiment;
  • FIG. 5 is a crossssec'tion along line VV of FIG. 4;
  • FIG. 6 is a plan view. of the strip employed in the embodiment shown in FIGS. 4 and 5;
  • FIG. 7 is an elevation, partially in cross-section, showing the strip and the auxiliary wheel, according to a third embodiment, the driving wheel not being shown;
  • FIG. 8 is a cross-section along line VIII-VIII of FIG. 7-
  • FIG. 9 being a crosssection along line IXIX of FIG. 11 and FIG. 10 being a cross-section along line X-X of FIG. 9;
  • FIG. 11 is a plan view of the strip utilized in the embodiment shown in FIGS. 9 and 10;
  • FIG. 12 is an elevation, partially in crosssection, showing the driving wheel, the strip and two auxiliary wheels, according to a fifth embodiment
  • FIG. 13 is a cross-section according to line XIII-XIII of FIG. 12;
  • FIG. 14 shows a modification of FIG. 13 and FIG. 15 and 16 are views similar to FIGS. 12 and 14 and relative to a sixth embodiment.
  • the weaving machine comprises, as is known, at least one inserter l, or weft picker, which includes a flexible strip 2 to which a front rigid section (not shown) is secured.
  • FIG. 9 and 10 are views similar to FIG. 7 and 8 and An alternating movement is imparted to the flexible strip 2 as per the double arrow A (FIGS. 1, 3, 4, 6, 7, 9, ll, 12 and 15); the strip is driven by a driving wheel 3 which is secured on its shaft 6 and to which a corresponding alternating rotation movement is imparted as per the double arrow B (FIGS. 1, 4, 12 and 15).
  • the wheel 3 carries on its circumference teeth 4 which penetrate into perforations 5 made regularly through the strip, in a longitudinal series, at the pitch of the teeth 4.
  • the strip 2 meshes with the wheel 3 in the upper part of the wheel 3, in the embodiments shown.
  • the inserter 1 On its alternating movement, the inserter 1 takes the weft from outside the shed and enters it into the latter, either as far as the other end, or as far as about the middle of the shed.
  • the inserter 1 takes the weft from outside the shed and enters it into the latter, either as far as the other end, or as far as about the middle of the shed.
  • the teeth 4 of wheel 3 exert a force on the strip 2 which offers a vertical component, directed upwards and tending to raise the strip.
  • At least one auxiliary idle wheel is provided, according to the invention, comprising on the one hand means to bear on the upper side of the strip, in the zone of cooperation between the latter and the wheel 3, and on the other hand meshing means on its circumference so that the rotation movement of wheel 3 is imparted to said idle wheel in this cooperation zone.
  • the auxiliary wheel is mounted in an idle manner, as shown schematically by a bearing 7, on a shaft 8.
  • the plane of the auxiliary wheel is either perpendicular to the plane of the strip in the said cooperation zone, in which case its axis is parallel to the strip in this zone and its bearing means are constituted by a cylindrical revolution surface, the axis of which is that of the auxiliary wheel, or inclinedwith respect to the plane of the strip in this zone, in which case its axis is inclined with respect to the strip and its bearing means are constituted by a con ical revolution surface the axis of which is that of the auxiliary wheel.
  • the auxiliary wheel 9 bears on the strip 2 and its movement is imparted to it directly by the driving wheel 3.
  • the strip 3 has aligned perforations 5 designed to mesh with the teeth 4 on the driving wheel 3.
  • the auxiliary wheel 9 has on its circumference cylindrical surface sections 12 separated by the tooth clearings or gaps 10.
  • the axis of shaft 8 is that of the surfaces 12 which are designed to bear on the strip, whilst the tooth clearings are adapted to mesh directly in a drive engagement with the teeth 4 of wheel 3, suitably shaped to extend sufficiently from and over the strip.
  • two side flanges could be provided with the same diameter as the surfaces 12.
  • wheel 3 in its alternating movement ac- :ording to arrow B drives directly, through its teeth 4, 30th the strip and wheel 9, whereas wheel 9 cooperates with the strip only by bearing and rolling substantially without slippage on it in order to prevent the strip being raised with respect to wheel 3.
  • the auxiliary wheel 9 has very low inertia; it :herefore absorbs quite negligeable energy.
  • the auxiliary wheel 9a is also in the plane of wheel 3 and it is driven by the strip 2, while bearing on it by two continuous cylindrical surfaces.
  • the wheel 9a has teeth 100 on its circumference, at the pitch of the perforations 5 of the strip and teeth 4 of wheel 3.
  • the teeth 10a mesh with perforations 11a of the strip, alternating with the perforations 5 and located on the same longitudinal line as they.
  • the teeth of one wheel are offset by onehalf pitch as compared to those of the other and enter without contact into the tooth clearings of this other wheel.
  • the bearing surfaces are formed of two flanges 12a whose axis is that of shaft 8.
  • the flanges 12a are located apart and spaced axially from the teeth 10a to bear on the strip 2 along to longitudinal bands located on either side of the line of perforations 5, 11a.
  • the diameter of the flanges 12a, the diameter of the pitch circle of wheel 9a and the distance between the axes of wheels 3, 9a are calculated so that, when the strip is tangent to the flanges, the teeth 10a mesh correctly with the perforations 11a of the strip.
  • wheel 3 in its alternating rotation movement according to arrow B, imparts an alternating movement according to arrow A to the strip.
  • wheel 9a is driven pratically without slippage by the strip on which it bears constantly by its flanges 12a.
  • the strip is thus maintained on wheel 3 in its correct meshing position and, owing to the fact that wheel 9a is coupled to wheel 3 by the strip, it does not rub against it.
  • the auxiliary wheel 9b differs from wheel 9a of FIGS. 4 and 5 only by the arrangement of the bearing surfaces on the strip.
  • the continuous flanges 12a of FIGS. 4 and 5 are deleted and replaced by shoulder pairs 12b which extend transversaly to the teeth 10b, similarly to the teeth 10a of wheel 9a, and which are radially inwardly offset in relation to teeth [Oh so as to bear on the upper side of the strip while the teeth 10b mesh with perforations 11a.
  • the auxiliary wheel is still in the plane of wheel 3 and contains two series of teeth 10c arranged symmetrically in relation to the median plane of the wheel (FIG. 10).
  • the strip has to symmetrical series of perforations He.
  • the tooth clearings form cylindrical surface sections 12c designed to bear on the strip. Between the two series of teeth 100, the wheel 90 has a groove 13 forthe passage of the drive wheels (not shown) tooth tops without contact.
  • auxiliary wheel has a cylindrical surface over its entire circumference from which teeth 10c project to pass throughthe drive wheel's (not shown) tooth tips.
  • the cylindrical surface 12c is drilled with blind holes 14 for the passage of the drive wheels (not shown) tooth tops.
  • the teeth 10c and hence the strips auxiliary perforations are located in the plane .of the holes 14 or offset in relation to this plane. In the firstcase, use is made of the strip of FIG.
  • FIGS. 12 and 16 Two embodiments have been shown on FIGS. 12 and 16 in which two auxiliary wheels are employed instead of the single auxiliary wheel9-9c on FIGS. 1 to 11.
  • two identical auxiliary wheels 9d are, provided with their circumference fitted with teeth 10d to mesh with the perforations 5 of the strip 2 which in this case is that of FIG. 3, these perforations being also used for the strip cooperation with the drive wheel 3.
  • the teeth 10d extend from the outer surface 12d of the wheel 9d, said surface 12d being adapted to bear. on the strip.
  • the auxiliary wheels 9d are offset with respect tothe center of the cooperation zone of the strip 2 and the drive wheel 3. The position of the auxiliary wheel axes is chosen so that teeth 10d pass at close proximity of teeth 4 of driving wheel 3, whatever the diameter of said auxiliary wheels may be.
  • the diameter of the wheels 9d can be chosen in such a manner that the contours of these wheels do not overlap. However with wheels of low diameter, the contact surface with the strip is very small and meshing is imperfect. For this reason, as shown in FIG. 12, the wheels 9d have a large diameter and their contours overlap. For their mounting and operation, they are inclined on either side of the median vertical longitudinal plane of strip 2 (FIG. 13), or offset axially in relation to this plane (FIG. 14). In the first case (FIG. 13), the bearing surfaces 12d are conical and teeth 10d occupy substantially all the width of perforations 5. In the second case (FIG.
  • the bearing surfaces 14d are cylindrical and teeth 10d are located near the facing radial faces of the auxiliary wheels and have an axial width so adapted that they engage only a lateral portion of the contour of the perforations 5, as shown by the crosssection and the break-away of FIG. 14.
  • two auxiliary wheels 92 are mounted in facing relationship on either sides of the median vertical plane of the strip, their axes being very nearer than the axes in FIG. 12.
  • teeth l0e which mesh, as shown in FIG. 16, with lateral perforations lle of the strip 2 which is similar to that of FIG. 11.
  • Teeth We extend from a cylindrical surface 12e bearing on the strip 2. Inwardly from the cylindrical surface l2e are provided recesses l4e for the passage of the driving wheel tooth tops without contact.
  • the strip is shown in FIG. 15 in crosssection successively in the planes of the teeth 10e and 4 of wheels 92 and 3.
  • the strip in FIG. 6 could be employed but with making the perforations 11a wider and with arranging the auxiliary wheels in a manner similar to that in FIGS. 13 and 14.
  • shaft 8 is an eccentric shaft whose rotation 6. enables the position of the auxiliary wheel that it carries to bevariedf a It results from"the above that; whatever the embodiment adopted, the auxiliary wheel is driven in synchronis m with the drive wheel and' the strip and that the slippage between the auxiliarywheel and the strip is pratically non-existarit.
  • the auxiliary wheel is subjected to a high speed alternating movement and to frequent reversals of direction, and as it transmits no torque, it is arranged so that it hasaslow as possible an inertia moa ment with respect to its axis.
  • it is composed oflight material, itis hollowed outto a maximum, and, preferably, given a diameter less than that .of-the drive wheel 3.
  • FIG. 12 It is also possible to provide one auxiliary wheel ac cording to FIG. 1, bordered by two auxiliary wheels according to FIG. 12 but with a diameter sufficiently little so that their teeth are in the same plane, the central wheel being inclined on one side of the longitudinal median vertical plane of the strip 2 and the two other wheels being inclined on the other side of said plane.
  • a guide for a weft inserting control tape comprising at least one inserter having a flexible strip with perforations, a driving wheel adapted to be rotated by a reciprotating movement and having teeth meshing with said perforations, whereby a cooperation zone is formed between the strip, and the wheel and an auxiliary idle wheel having means engaging an outer surface of said strip in said zone to prevent a separation of the strip from said driving wheel, as well as meshing means carried upon the circumference of the idle wheel to cause said driving wheel to impart a rotary movement to said idle wheel.
  • auxiliary wheel meshing means is composed of teeth arranged to mesh directly in a driving engagement with the teeth of the driving wheel which extend beyond the strip.
  • auxiliary wheel meshing means is composed of teeth with the pitch of the perforations of the strip and teeth of the driving wheel and arranged to mesh in a driving engagement with auxiliary perforations of the strip these auxiliary perforations alternating with the perforations of the strip which mesh with the teeth of the drive wheel and being offset laterally or not with respect to the strip perforations meshing with the driving wheel.
  • bearing means are composed of at least one revolution surface whose axis is that of the auxiliary wheel.
  • bearing means are composed of at least one continuous flange.
  • bearing means are composed of a number of separate surfaces.
  • bearing means have recesses for the passage of the tops of the teeth of the driving wheel.
  • auxiliary wheel is single and located in the driving wheel plane.
  • Weaving machine comprising two auxiliary wheels which are offset with respect to the driving wheel plane and whose contours overlap, said auxiliary wheels being arranged to cooperate with the strip on either sides of the center of the said cooperation zone.
  • Weaving machine according to claim 10 comprising two auxiliary wheels which are in the driving wheel plane and which are provided with teeth adapted to mesh with the strip perforations meshing with the driving wheel teeth.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US496907A 1973-08-13 1974-08-12 Tape drive in weaving machines Expired - Lifetime US3916957A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU68217A LU68217A1 (enrdf_load_stackoverflow) 1973-08-13 1973-08-13

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US3916957A true US3916957A (en) 1975-11-04

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ID=19727438

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Application Number Title Priority Date Filing Date
US496907A Expired - Lifetime US3916957A (en) 1973-08-13 1974-08-12 Tape drive in weaving machines

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US (1) US3916957A (enrdf_load_stackoverflow)
JP (1) JPS50105966A (enrdf_load_stackoverflow)
BE (1) BE818676A (enrdf_load_stackoverflow)
BR (1) BR7406550D0 (enrdf_load_stackoverflow)
DE (1) DE2438717C3 (enrdf_load_stackoverflow)
ES (1) ES429162A1 (enrdf_load_stackoverflow)
FR (1) FR2240971B1 (enrdf_load_stackoverflow)
GB (1) GB1428594A (enrdf_load_stackoverflow)
IT (1) IT1019835B (enrdf_load_stackoverflow)
LU (1) LU68217A1 (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4100941A (en) * 1975-05-06 1978-07-18 Northrop Weaving Machinery Limited Rapier looms
EP0095137A3 (en) * 1982-05-25 1984-02-22 VAMATEX S.p.A. Arrangement for controlling the movement of the weft conveying grippers in shuttleless looms
US4977932A (en) * 1988-09-08 1990-12-18 Vamatex S.P.A. Edge guide for weft gripper belt
US20100116851A1 (en) * 2008-11-07 2010-05-13 Hilti Aktiengesellschaft Squeeze-out dispenser

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60177978U (ja) * 1984-04-28 1985-11-26 株式会社豊田自動織機製作所 レピア織機における緯入れ装置
US5097873A (en) * 1987-04-03 1992-03-24 Textilma Ag Gripper loom with a flexible fitting thread insertion band

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3364954A (en) * 1964-10-03 1968-01-23 Dornier Gmbh Lindauer Shuttleless loom
US3682204A (en) * 1969-06-02 1972-08-08 Raymond Dewas Weaving looms with external weft reserve
US3717182A (en) * 1970-05-18 1973-02-20 R Sparling Rapier loom

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3364954A (en) * 1964-10-03 1968-01-23 Dornier Gmbh Lindauer Shuttleless loom
US3682204A (en) * 1969-06-02 1972-08-08 Raymond Dewas Weaving looms with external weft reserve
US3717182A (en) * 1970-05-18 1973-02-20 R Sparling Rapier loom

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4100941A (en) * 1975-05-06 1978-07-18 Northrop Weaving Machinery Limited Rapier looms
EP0095137A3 (en) * 1982-05-25 1984-02-22 VAMATEX S.p.A. Arrangement for controlling the movement of the weft conveying grippers in shuttleless looms
US4977932A (en) * 1988-09-08 1990-12-18 Vamatex S.P.A. Edge guide for weft gripper belt
US20100116851A1 (en) * 2008-11-07 2010-05-13 Hilti Aktiengesellschaft Squeeze-out dispenser
US9878345B2 (en) * 2008-11-07 2018-01-30 Hilti Aktiengesellschaft Squeeze-out dispenser

Also Published As

Publication number Publication date
FR2240971A1 (enrdf_load_stackoverflow) 1975-03-14
GB1428594A (en) 1976-03-17
DE2438717B2 (de) 1977-12-22
IT1019835B (it) 1977-11-30
LU68217A1 (enrdf_load_stackoverflow) 1975-05-21
BR7406550D0 (pt) 1975-05-27
BE818676A (fr) 1975-02-10
JPS50105966A (enrdf_load_stackoverflow) 1975-08-21
DE2438717A1 (de) 1975-02-27
ES429162A1 (es) 1976-09-01
DE2438717C3 (de) 1978-08-10
FR2240971B1 (enrdf_load_stackoverflow) 1978-06-16

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