EP0703309A1 - Präzisionsnähmaschine, insbesondere zum Ansetzen von gestrickten Borden an Kleidungsstücke oder dgl - Google Patents

Präzisionsnähmaschine, insbesondere zum Ansetzen von gestrickten Borden an Kleidungsstücke oder dgl Download PDF

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Publication number
EP0703309A1
EP0703309A1 EP95115085A EP95115085A EP0703309A1 EP 0703309 A1 EP0703309 A1 EP 0703309A1 EP 95115085 A EP95115085 A EP 95115085A EP 95115085 A EP95115085 A EP 95115085A EP 0703309 A1 EP0703309 A1 EP 0703309A1
Authority
EP
European Patent Office
Prior art keywords
border
stitcher
rollers
traction
traction roller
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.)
Withdrawn
Application number
EP95115085A
Other languages
English (en)
French (fr)
Inventor
Mario Valle
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.)
Conti Complett SpA
Original Assignee
Conti Complett SpA
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 Conti Complett SpA filed Critical Conti Complett SpA
Publication of EP0703309A1 publication Critical patent/EP0703309A1/de
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B27/00—Work-feeding means
    • D05B27/10—Work-feeding means with rotary circular feed members
    • D05B27/14—Work-feeding means with rotary circular feed members rotating discontinuously

Definitions

  • the present invention relates to a precision stitcher, particularly for applying knitted borders to items of clothing or the like.
  • Stitchers for applying knitted borders to items of clothing with very precise stitches, so as to achieve an effect that is qualitatively comparable with darning, are known.
  • These conventional machines comprise a stitching head that is provided with a needle and is arranged above an ideal working plane, along which the item to be bordered and the border to be applied are fed simultaneously. Below the ideal working plane, at the needle working area, a crochet is provided that cooperates with the needle to form the stitch.
  • a shaped guide is provided wherein the border to be applied is inserted; by passing through said guide, said border is folded so as to straddle the upper and lower sides of the flap of the item of clothing to be bordered, which is fed towards the needle by a wheel or belt arranged laterally adjacent to the feeding path of the border at least directly upstream of the needle working area.
  • a border traction device Downstream of the needle working area, again along the advancement direction of the item to be bordered and of the border to be applied during stitching, a border traction device is provided that is usually composed of two traction rollers arranged respectively below and above the ideal working plane, so that their axes are orientated transversely to the advancement direction to be given to the border to be applied. These two rollers generally have an appropriate knurled contact surface, so as to achieve optimum adhesion to the border that is inserted between the two rollers, and are actuated with an intermittent rotation, in step with the movement of the needle, about their respective axes and with opposite rotation directions, so as to cause the intended advancement of the border during stitching.
  • the actuation of the border traction rollers is fundamental in these machines, since the extent of the advancement of the border, with respect to the actuation rate of the needle, determines the length of the stitch.
  • the length of the stitch In order to achieve an effect that is comparable with darning, the length of the stitch must be substantially equal to the distance between two adjacent stitches of the border to be applied; that is to say, the length of the stitch must be precisely correlated to the fineness of the border to be applied.
  • a device is provided whereby it is possible to vary the rotation angle of the traction rollers to adapt it, in each instance, to the fineness of the border to be applied.
  • the devices for varying the extent of the rotation of the border traction rollers are constituted by manually-actuated mechanical variators that act by varying the extent of the rotation angle transmitted by the main motor to the traction rollers.
  • Another problem is the gradual decrease in precision caused by the inevitable wear of the components of the adjustment device.
  • a principal aim of the present invention is to solve the problems described above by providing a stitcher, particularly for applying knitted borders to items of clothing or the like, that is highly precise in stitch length adjustment.
  • an object of the invention is to provide a stitcher in which it is possible to automatically adjust the length of the stitch as a function of the fineness of the border to be applied.
  • Another object of the invention is to provide a stitcher with a stitch length adjustment device that is more compact than the adjustment devices of currently commercially available machines.
  • a precision stitcher particularly for applying knitted borders to items of clothing or the like, comprising a stitching head provided with a needle and two traction rollers for the border to be applied, said rollers being arranged downstream of the needle working area with respect to the advancement direction of the border to be applied and so that their axes lie transversely to the border advancement direction, and being actuatable with an intermittent rotary motion about their respective axes and with opposite rotation directions to move said border, interposed between said traction rollers, along said advancement direction; characterized in that it comprises at least one step motor actuatable on command and connected to said rollers for their actuation with an intermittent rotary motion about their respective axes.
  • the stitcher according to the invention comprises, in a per se known manner, a stitching head 2 provided with a needle 3 and arranged above an ideal working plane 4, along which the item of clothing to be bordered and the border to be applied, not shown for the sake of simplicity, are fed simultaneously.
  • the stitcher is equipped, in a per se known manner, with a feeder for the item of clothing to be bordered; said feeder can be constituted simply by a wheel, on the perimeter whereof the edge of the item of clothing to be bordered is rested, or can be constituted by a belt or another conveyor element that produces the gradual advancement of the item to be bordered towards the needle 3.
  • rollers for the traction of the border to be applied Downstream of the working area of the needle 3, with respect to the advancement direction given to the item to be bordered and to the border to be applied, there is a pair of rollers for the traction of the border to be applied; said pair is composed of two rollers 5 and 6 that are arranged respectively above and below the working plane 4 and are orientated so that their axes 5a and 6a are mutually parallel and lie transversely to the advancement direction to be given to the border to be applied.
  • the wall of the two rollers 5 and 6, which makes contact with the border to be applied is adequately knurled and/or covered with a material providing excellent adhesion to the border to be applied, so as to effectively avoid accidental slippage of the border with respect to the rollers 5 and 6 during traction.
  • the two rollers 5 and 6 are rotatably actuated about their respective axes 5a and 6a with mutually opposite rotation directions, so as to cause an intermittent advancement of the border to be applied, which is inserted between the rollers, in step with the movement of the needle.
  • rollers 5 and 6 are actuated about their respective axes 5a and 6a by at least one step motor, differently from conventional machines.
  • step motors 7 and 8 which actuate the upper roller 5 and the lower roller 6 respectively.
  • the lower roller 6 is rotatably supported, about its axis 6a by a fixed support 9 directly connected to the supporting structure of the machine, and the output shaft 8a of the step motor 8 is connected to the shaft 10 of the roller 6, which is mounted on the support 9 by virtue of the interposition of bearings 11.
  • the upper roller 5 is instead rotatably supported about its own axis 5a by a movable support 12 pivoted to the fixed support 9 about an axis that is parallel to the axis 5a and 6a of the rollers 5 and 6 so that, by virtue of the oscillation of the movable support 12 with respect to the fixed support 9, it is possible to space the roller 5 from the roller 6 during the insertion of the border to be applied between the rollers 5 and 6.
  • the shaft 13 of the upper roller 5, which is arranged parallel to the shaft 10, is mounted on the movable support 12 by virtue of the interposition of bearings 14 and is connected to the step motor 7 by an intermediate shaft 15, which is parallel to, and spaced from, the shaft 13 and constitutes the pivot for connecting the movable support 12 to the fixed support 9.
  • the intermediate shaft 15 is supported by the fixed support 9 so as to be rotatable about its own axis and supports the movable support 12 so as to be rotatable about the same axis; said movable support 12 in turn supports the shaft 13 of the roller 5.
  • the shaft 15 is connected to the output shaft 7a of the step motor 7, and its rotation is transmitted to the shaft 13 by virtue of a toothed belt 25 that connects a toothed pulley 16, keyed to the intermediate shaft 15, to a toothed pulley 17 keyed to the shaft 13.
  • the movable support 12 is provided with an arm 18, whereon a lever 19 acts; said lever can be actuated to cause the oscillation of the movable support 12 with respect to the fixed support 9 about the axis 15a of the shaft 15, so as to space the upper roller 5 from the lower roller 6.
  • the oscillation of the movable support in the direction that spaces the upper roller 5 from the lower roller 6 is contrasted by a spring 20 connected to the movable support 12 at one end and to the fixed support 9 at the other end.
  • the distance between the upper roller 5 and the lower roller 6, in the maximum mutual approach condition, can be adjusted by means of an adapted setting screw 21 mounted on the movable support 12 and resting on a locator 22 that is fixed to the fixed support 9.
  • the step motors 7 and 8 are actuated by a programmable electronic control device 23 that supervises the operation of the entire machine. In this manner it is possible to program the advancement spaces of the border to be applied according to the fineness range of the borders, so that the electronic control element 23 actuates the step motors 7 and 8 through rotation angles that exactly match the fineness of the border to be applied.
  • stitch length adjustment is completely automated and safely excludes the possibility of errors or of poor precision, allowing to achieve a stitching that can be compared with darning in terms of quality.
  • the stitcher according to the invention fully achieves the intended aim, since it offers high precision in stitch length adjustment, avoiding any manual intervention to adjust the length of the stitch and allowing perfect repeatability of a stitch of preset length.
  • the materials employed, as well as the dimensions, may be any according to the requirements and the state of the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Treatment Of Fiber Materials (AREA)
EP95115085A 1994-09-26 1995-09-25 Präzisionsnähmaschine, insbesondere zum Ansetzen von gestrickten Borden an Kleidungsstücke oder dgl Withdrawn EP0703309A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI941948 1994-09-26
ITMI941948A IT1270014B (it) 1994-09-26 1994-09-26 Macchina cucitrice a punti precisi,particolarmente per l'applicazione di bordi in maglia a capi di abbigliamento o simili.

Publications (1)

Publication Number Publication Date
EP0703309A1 true EP0703309A1 (de) 1996-03-27

Family

ID=11369596

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95115085A Withdrawn EP0703309A1 (de) 1994-09-26 1995-09-25 Präzisionsnähmaschine, insbesondere zum Ansetzen von gestrickten Borden an Kleidungsstücke oder dgl

Country Status (2)

Country Link
EP (1) EP0703309A1 (de)
IT (1) IT1270014B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0805228A1 (de) * 1996-05-02 1997-11-05 CONTI COMPLETT S.p.A. Präzisionsnähmaschine zum Ansetzen eines schlauchförmigen Bundes an den Rand eines gestrickten oder gewebten Stoffes oder dgl.
EP0882830A1 (de) * 1997-06-03 1998-12-09 CONTI COMPLETT S.p.A. Präzisionsnähmaschine

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4147120A (en) * 1977-09-14 1979-04-03 Union Special Corporation Auxiliary feed mechanism for sewing machines
GB2021164A (en) * 1978-05-19 1979-11-28 Strauss Levi & Co Apparatus for controlling the feeding of workpeices through a work station
US4182248A (en) * 1977-08-08 1980-01-08 Klages Arthur C Fabric puller
US4295435A (en) * 1978-09-12 1981-10-20 Tokyo Juki Industrial Co., Ltd. Cloth feed apparatus
US4303027A (en) * 1978-07-10 1981-12-01 Tokico, Ltd. Cloth feeding apparatus
EP0115264A1 (de) * 1983-01-10 1984-08-08 Exacta S.R.L. Nähmaschine mit Präzisionstransporteinrichtung
DE3516715A1 (de) * 1985-05-09 1986-11-13 Pfaff Industriemaschinen Gmbh, 6750 Kaiserslautern Naehmaschine mit einer vorschubeinrichtung
DE4239674A1 (de) * 1992-10-23 1994-04-28 Lee Sara Corp Verfahren und Vorrichtung zum automatischen Befestigen eines Bundes, Sichtteils und Etiketts an einem Kleidungsstück in einer zweistufigen Nähoperation

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4182248A (en) * 1977-08-08 1980-01-08 Klages Arthur C Fabric puller
US4147120A (en) * 1977-09-14 1979-04-03 Union Special Corporation Auxiliary feed mechanism for sewing machines
GB2021164A (en) * 1978-05-19 1979-11-28 Strauss Levi & Co Apparatus for controlling the feeding of workpeices through a work station
US4303027A (en) * 1978-07-10 1981-12-01 Tokico, Ltd. Cloth feeding apparatus
US4295435A (en) * 1978-09-12 1981-10-20 Tokyo Juki Industrial Co., Ltd. Cloth feed apparatus
EP0115264A1 (de) * 1983-01-10 1984-08-08 Exacta S.R.L. Nähmaschine mit Präzisionstransporteinrichtung
DE3516715A1 (de) * 1985-05-09 1986-11-13 Pfaff Industriemaschinen Gmbh, 6750 Kaiserslautern Naehmaschine mit einer vorschubeinrichtung
DE4239674A1 (de) * 1992-10-23 1994-04-28 Lee Sara Corp Verfahren und Vorrichtung zum automatischen Befestigen eines Bundes, Sichtteils und Etiketts an einem Kleidungsstück in einer zweistufigen Nähoperation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0805228A1 (de) * 1996-05-02 1997-11-05 CONTI COMPLETT S.p.A. Präzisionsnähmaschine zum Ansetzen eines schlauchförmigen Bundes an den Rand eines gestrickten oder gewebten Stoffes oder dgl.
EP0882830A1 (de) * 1997-06-03 1998-12-09 CONTI COMPLETT S.p.A. Präzisionsnähmaschine

Also Published As

Publication number Publication date
ITMI941948A0 (it) 1994-09-26
IT1270014B (it) 1997-04-16
ITMI941948A1 (it) 1996-03-26

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