EP3521498B1 - Procédé et dispositif permettant d'éviter des points placés imprécis sur un fond à broder d'un métier à broder - Google Patents

Procédé et dispositif permettant d'éviter des points placés imprécis sur un fond à broder d'un métier à broder Download PDF

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Publication number
EP3521498B1
EP3521498B1 EP18209074.6A EP18209074A EP3521498B1 EP 3521498 B1 EP3521498 B1 EP 3521498B1 EP 18209074 A EP18209074 A EP 18209074A EP 3521498 B1 EP3521498 B1 EP 3521498B1
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EP
European Patent Office
Prior art keywords
embroidery
holding means
ground
creel
gate
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.)
Active
Application number
EP18209074.6A
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German (de)
English (en)
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EP3521498A1 (fr
Inventor
Franz Lässer
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.)
Laesser AG
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Laesser AG
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Publication of EP3521498A1 publication Critical patent/EP3521498A1/fr
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05C—EMBROIDERING; TUFTING
    • D05C9/00—Appliances for holding or feeding the base fabric in embroidering machines
    • D05C9/08—Appliances for holding or feeding the base fabric in embroidering machines in machines with horizontal needles
    • D05C9/10—Work holders or carriers
    • D05C9/12—Holding or stretching arrangements for the base fabric in embroidery work holders
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05C—EMBROIDERING; TUFTING
    • D05C9/00—Appliances for holding or feeding the base fabric in embroidering machines
    • D05C9/22—Adjusting or registering devices for the base fabric, e.g. for alignment with respect to the needles
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05C—EMBROIDERING; TUFTING
    • D05C13/00—Auxiliary devices incorporated in embroidering machines, not otherwise provided for; Ancillary apparatus for use with embroidering machines
    • D05C13/02—Counting, measuring, indicating, warning, or safety devices

Definitions

  • the subject matter of the invention is a method for preventing imprecisely placed stitches on the embroidery ground of an embroidery machine according to the preamble of patent claim 1 and a device for preventing imprecisely placed stitches on the embroidery ground of an embroidery machine according to the preamble of patent claim 4.
  • Modern embroidery machines are able to set 700 stitches per minute in an embroidery base that is stretched on the frame of an embroidery machine. More than 1,000 needles can be arranged on such an embroidery machine, which are distributed at regular intervals over a length of 30 meters or more. Consequently, the embroidery ground, ie a fabric clamped in the creel, is correspondingly long and weighs several kilograms. Due to the movement of the gate with each stitch, at least in one or simultaneously in both directions X and Y, the embroidery ground shifts due to its inertia in the X and/or Y direction in such a way that the length of the stitches set over the entire length of the embroidery ground can be different. In the The changes in length are smallest in the edge areas at the top/bottom and left/right at the ends.
  • This trailing of the embroidery ground can also have a negative effect on the needles if they move transversely to the needle during the puncture of the embroidery ground. Even the smallest stitch length changes can be noticed and the aesthetics of the embroidered workpiece can have a negative effect.
  • an embroidery machine gate with side clamping bars is known.
  • the side tension bars are composed of individual segments and thus make it possible to keep the embroidery ground taut when waving or they prevent the embroidery ground from having to be stretched out again at the side after waving.
  • these known elements cannot prevent the embroidery base from suffering during the embroidering of an embroidery pattern due to the inertia of the mass of the s38tick base caused by the creel movement.
  • a multi-needle head embroidery machine is also known in which the embroidery ground is pressed against the needle hole plate during drilling in order to hold the embroidery ground around the hole to be produced and to prevent it from being drawn into the hole.
  • the presser foot is lifted and the embroidery base can therefore be moved freely.
  • a presser foot is also known, as is also used in household sewing machines or sewing machines in general.
  • the presser foot with a foot with a central opening is used to press the fabric onto the needle plate during insertion of the needles and in particular during retraction of the needle. After the stitch is finished and while the fabric is moving the length of the stitch, the presser foot remains raised and the fabric is during this Time not kept and can consequently move uncontrolled in the x, y and z direction.
  • a thread cutting and clamping device for an embroidery machine is also known.
  • a fabric presser is also disclosed there, which comes to lie between two needles and presses the embroidery base onto the needle hole plate while the needles are being inserted and pulled back.
  • the embroidery ground is not held during the displacement of the embroidery ground by a stitch length and can therefore not follow due to the inertia of the mass of the embroidery ground due to the high speed of the gate movement and consequently uncontrollably offset stitches can be set, which lead to an impairment of the lead embroidery picture.
  • the high number of stitches (for example 720 stitches per minute, ie 12 stitches per second) can lead to vibrations in the Z-direction, ie perpendicular to the surface of the embroidery ground. Since the embroidery ground is not directly on the needle plate, the fabric presser presses the embroidery ground 12 times per second in direction x against the needle plate and releases it again. These movements can also affect the embroidery image. Such undesired movements of the embroidery ground occur to an increased extent when the usual clamping distance of the embroidery ground between the two horizontal winding shafts becomes larger. In order to make embroidery machines even more efficient, embroidery machines with embroidery areas up to 2.8 meters in height without renewed corrugation have become known. In other words, the embroidery ground clamped between the two winding shafts makes due to inertia Movements in the x, y, and z directions increase problems.
  • An object of the present invention is to create a method and a device with which the undesired movements in the X, Y and Z directions can be prevented or at least reduced to an acceptable level invisible to the eye, so that the stitch base is invisible over the entire embroidery area between the winding shafts and the side tension rods can be embroidered with exactly identical stitch lengths.
  • the calming of the embroidery ground or the prevention of the embroidery ground shifting beyond the extent of the gate movement due to its inertia due to the gate movements is remedied by the fact that holding means rigidly connected to the gate are carried along, which act on the embroidery ground and move it in X - and Y-direction with respect to the gate immovable.
  • the embroidery ground also in the Z-direction, i.e. perpendicular to the plane of the fabric, and prevents undesired fluttering.
  • pin cushions are formed on the spaced holding means, the fine needles of which are pushed through or pierced through the embroidery base.
  • the holding means are carried on the already existing gate supports, which are arranged at regular intervals along the embroidery machine in the gate.
  • the pincushion can be extended in the vertical direction (Z-direction) towards the embroidery base and thus hold it in position exactly synchronous to the movements of the creel.
  • the embroidery ground can no longer move horizontally due to the inertia of the mass and, in the case of vertical movements, in the vertical direction relative to the gate. If the pincushion is advanced so far that the embroidery ground is slightly shifted in the Z-direction out of the plane between the winding shafts of the embroidery ground, vibrations in the Z-direction can also be reduced.
  • the pincushion is pulled away from the embroidery ground in the Z-direction until the needles have left the embroidery ground, and is also pivoted about a horizontal pivot axis in order to lie further away from the embroidery ground on the gate support.
  • the holding means could also be pivoted laterally about a vertical axis. However, this is less advantageous since it would reduce the gaps between the gate supports and thus reduce the maximum side travel.
  • the holding means can be mechanically moved into the working position, i.e. perpendicular to the embroidery base, and their pin cushions can be moved out and back in the direction of the embroidery base pneumatically or in some other way.
  • other cushions that have a high coefficient of friction with the embroidery base can also be attached to the holding means in the second embodiment, such as cushions made of rubber, Velcro strips, foam and the like, which prevent the embroidery base from sliding in the X and Y direction.
  • reference numeral 1 denotes a gate tower. This stands on a foundation 25 or on a Schifflibock 3 of the rear carriage, which contains the drive elements for the shuttle (not shown) and for setting the width of the carriage, as well as the drive means for the gate height drive.
  • a rail 5 is fastened to the gate tower 1, on which two or more carriages 7 are mounted so that they can be moved vertically.
  • the carriages 7 carry gate supports 11 fastened in the gate 9 and on the gate 9.
  • the upper winding shaft 13 is arranged in the upper region of the gate 9 and the lower winding shaft 15 is arranged at the lower end and is shown schematically. Between the two winding shafts 13, 15 runs an embroidery base 17 stretched between these winding shafts. This is shown with a dot-dash line.
  • FIG. 1 An upper holding means 19a and a lower holding means 19b can be seen. Between the two holding means 19a and 19b, the shuttle tracks 21, also called Stöckli, are shown schematically without their drives.
  • area A is shown on an enlarged scale in figure 1 shown.
  • the second holding means 19b below the shuttle track 21 is identical to the first-mentioned one and is fastened upside down to the gate support 11 (area B in figure 1 ).
  • a linear drive 29 for example a pneumatic or hydraulic cylinder or a spindle that can be driven by an electric motor, a boom 31 can be pivoted about a pivot axis q from a rest position parallel to the gate support 11 (cf Figures 3 and 4 in a working position perpendicular to it according to figures 1 , 2 , 5 and 6 ).
  • the cantilever 31, which is mounted on the axis q, comprises a support with two parallel cheeks 33, on which a second linear drive arrangement 35 is attached, on the drive rods 37 of which a pin cushion 39 is attached ( Figures 2 to 4 ).
  • the drive rods 37 are mounted in the cheeks 33 in a longitudinally displaceable manner.
  • the pin cushion 39 fixed to the free end of the drive rods 37, comprises a support plate 43 carrying the pins 41. The latter lies at rest, preferably within the volume of the casing 27 between the cheeks 33, so that the needles 41 do not protrude the latter and are protected against damage and do not pose a risk of injury to the operators.
  • the first linear drive 29 is mounted pivotably on a bearing pin 45 .
  • the bearing pin 45 is held by a mounting plate 47 .
  • the mounting plate 47 is fixed to the gate post 11 with screws 49 .
  • a large number of bores for the screws 49 can be provided on the gate supports in order to be able to fasten the holding means 19 at suitable points.
  • a piston rod 51 protrudes from the top of the first linear drive 29.
  • a joint head 53 which engages in a shaft 55, is fastened to it.
  • the shaft 55 is fastened at its ends in the side walls 27' and 27'' forming the casing 27.
  • the casing 27 can consequently be pivoted about the axis q with the first linear drive 29.
  • a bolt 57 is seated on the axis q, at both ends of which a plate 59, for example in the shape of a rhombus, is fastened in a rotationally fixed manner.
  • the plate 59 is screwed at its ends to the side walls 27' and 27'' by screws 61.
  • the rear end of the bolt 57 is connected to the fastening plate 47.
  • the two linear drives 29, 35 are connected by hoses or lines to the associated compressed air sources or electrical switches. The latter are not shown.
  • the needle cushion 39 arranged in the casing 27 is pivoted by an angle of 90° with the first linear drive 29 .
  • the 90° angle is preferably precisely defined by an end stop 63 on the mounting plate 47 . Then the pincushion 39 with the needles 41 on the holding plate 43 is pushed in the Z direction perpendicularly to the embroidery base 17 .
  • the fine needles 41 penetrate the embroidery base 17 and, if desired, can also press it slightly in the Z direction, for example by a few millimeters, to the right in the Z direction. This ensures that the embroidery base 17 does not become detached from the needles 41 during the embroidering as a result of any vibrations of the creel 9 running in the Z direction.
  • the gate 9 with the gate supports 11 fixedly arranged thereon is moved in the X and/or Y direction, i.e. horizontally and vertically, in a conventional manner in order to carry out a correspondingly programmed embroidery on the embroidery base 17 or its stitches and the to allow length between stitches. Since the holding means 19 with the pin cushion 39 now executes exactly the same movement as the gate 9, the embroidery base 17 can no longer move strongly relative to the gate 9 despite high accelerations and decelerations. As a result, the embroidery base 17 is always kept exactly positioned in relation to the gate 9 .
  • a holding means 19 is always arranged above and below the embroidery area on the creel supports, it is ensured that in the embroidery area, here an area running over the entire length of the embroidery machine, can be stabilized.
  • the lower pin cushions 39 When changing from the upper to the lower embroidery area, only the lower pin cushions 39 have to be withdrawn from the embroidery base 17 and the gate 9 has to be shifted by the width of the area to be subsequently embroidered.
  • the needles 41 then move back into the embroidery base 17 and hold it in position during further processing by the embroidery machine.
  • rubber plates, nubs, hook tapes, loop tapes, foam rubber plates or other cushions can also be fastened as retaining elements on the retaining plate 43, which prevent damage to the embroidery base 17, especially with very finely designed embroidery base materials, but still hold it.
  • a suitable telescopic rail or a telescopic tube would also be conceivable, at the end of which the pin cushions 39 are attached. This would eliminate the pivoting movement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Claims (9)

  1. Procédé pour éviter des points placés de façon imprécise pendant le processus de brodage, sur un fond à broder (17) maintenu tendu entre deux arbres d'enroulement (13, 15) et deux templets latéraux sur une machine à broder à navettes avec un cantre (9),
    caractérisé en ce que,
    lors du brodage, le fond à broder (17) est fixé avec des moyens de fixation (19) en plusieurs emplacements dans les directions X, Y et Z, avec positionnement exact relativement au cantre (9), au-dessus et/ou en dessous de la zone à broder, entre les arbres d'enroulement (13, 15) et les templets.
  2. Procédé selon la revendication 1, caractérisé en ce que les moyens de fixation (19) traversent le fond à broder (17) pendant le processus de brodage ou le maintiennent en position par frottement par adhérence ou de glissement.
  3. Procédé selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que le fond à broder (17) est dévié dans la direction Z perpendiculairement par rapport au fond à broder (17), avec le moyen de fixation (19).
  4. Dispositif pour l'exécution du procédé selon la revendication 1, comprenant une machine à broder à navettes avec un cantre (9) et avec des supports de cantre (11) disposés dans le cantre (9), deux arbres d'enroulement (13, 15) et deux templets latéraux pour le support d'un fond à broder (17) en le maintenant tendu, caractérisé en ce que
    des moyens de fixation (19) pivotants ou extensibles sont disposés sur les supports de cantre (11), avec lesquels le fond à broder (17) est positionnable de façon non déplaçable par rapport au cantre lors du brodage.
  5. Dispositif selon la revendication 4, caractérisé en ce que les moyens de fixation (19) sont formés contre le fond à broder (17) et pouvant en être éloignés.
  6. Dispositif selon la revendication 5, caractérisé en ce que les moyens de fixation (19) sont articulés de façon pivotante sur les supports de cantre (11).
  7. Dispositif selon l'une quelconque des revendications 4 à 6, caractérisé en ce que des éléments de contact sont formés sur les moyens de fixation (19) pour le contact avec le fond à broder (17).
  8. Dispositif selon la revendication 7, caractérisé en ce que des aiguilles (41), des coussinets auto-agrippants ou en mousse ou un poinçon avec une surface présentant un coefficient de frottement élevé sont utilisés.
  9. Dispositif selon l'une quelconque des revendications 4 à 8, caractérisé en ce que le positionnement moyens de fixation dans la direction Z (19) est effectué par un entraînement linéaire (35).
EP18209074.6A 2018-02-05 2018-11-29 Procédé et dispositif permettant d'éviter des points placés imprécis sur un fond à broder d'un métier à broder Active EP3521498B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH00127/18A CH714623A1 (de) 2018-02-05 2018-02-05 Verfahren und Vorrichtung zur Verhinderung von ungenau auf dem Stickgrund einer Stickmaschine gesetzten Stichen.

Publications (2)

Publication Number Publication Date
EP3521498A1 EP3521498A1 (fr) 2019-08-07
EP3521498B1 true EP3521498B1 (fr) 2022-09-14

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Application Number Title Priority Date Filing Date
EP18209074.6A Active EP3521498B1 (fr) 2018-02-05 2018-11-29 Procédé et dispositif permettant d'éviter des points placés imprécis sur un fond à broder d'un métier à broder

Country Status (4)

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EP (1) EP3521498B1 (fr)
KR (1) KR20190095090A (fr)
CH (1) CH714623A1 (fr)
TW (1) TW201934835A (fr)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH48455A (de) * 1909-08-14 1910-10-17 Carl Aberer Neuerung an Schiffchenstickmaschinen
JPS61103484A (ja) * 1984-10-25 1986-05-21 松下　良一 クツシヨン，ソツフア用キルテングの布押え装置
ATE236283T1 (de) * 1997-10-27 2003-04-15 Laesser Franz Ag Stickmaschinengatter mit seitenspannleisten
US7143705B2 (en) * 2002-03-06 2006-12-05 L & P Property Management Company Multiple horizontal needle quilting machine and method
DE102008035434B4 (de) * 2008-07-29 2015-02-05 Saurer Ag Stoffdrücker einer Stickmaschine
CH702068A1 (de) * 2009-10-26 2011-04-29 Laesser Ag Mehrkopf-Mehrnadel-Stickmaschine und Spannrahmen dafür.
CH703065A1 (de) * 2010-04-23 2011-10-31 Laesser Ag Stickmaschine und Verfahren zum Betreiben einer Stickmaschine.
JP6143327B2 (ja) * 2013-02-01 2017-06-07 蛇の目ミシン工業株式会社 刺繍用布押さえ
CH712727A1 (de) * 2016-07-21 2018-01-31 Lässer Ag Stickmaschine, insbesondere Schiffchenstickmaschine.
CN206385332U (zh) * 2016-11-08 2017-08-08 浙江百翔科技有限公司 一体化手套机

Also Published As

Publication number Publication date
TW201934835A (zh) 2019-09-01
CH714623A1 (de) 2019-08-15
EP3521498A1 (fr) 2019-08-07
KR20190095090A (ko) 2019-08-14

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