EP1749917B1 - System for securing the needle thread after threading - Google Patents
System for securing the needle thread after threading Download PDFInfo
- Publication number
- EP1749917B1 EP1749917B1 EP06405182.4A EP06405182A EP1749917B1 EP 1749917 B1 EP1749917 B1 EP 1749917B1 EP 06405182 A EP06405182 A EP 06405182A EP 1749917 B1 EP1749917 B1 EP 1749917B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hook
- needle
- threading
- eye
- thread
- 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.)
- Not-in-force
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Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B87/00—Needle- or looper- threading devices
- D05B87/02—Needle- or looper- threading devices with mechanical means for moving thread through needle or looper eye
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B53/00—Thread- or cord-laying mechanisms; Thread fingers
Definitions
- the invention relates to a device for securing the upper thread loop after threading according to the preamble of patent claim 1.
- An object of the present invention is to provide a functionally reliable functionally reliable device for securing the upper thread loop after its formation by the Einfädelhaken.
- the wire hanger is after the Threading and the upward driving of the threading hook outside the sewing area and is protected despite its filigree training from damage.
- a support and pivot device 1 is designated. This is held pivotably about a vertical pivot axis in the upper arm of a sewing machine, not shown.
- the swivel device 1 is also in the vertical direction from a raised rest position (no Fig.) In a lowered threading position according to FIGS. 1 to 4 movably mounted.
- a needle with a needle eye, short eye 5 is shown.
- the needle 3 is in the raised position, ie the needle 3 does not dip into a material to be sewn (not shown).
- On the pivoting device 1 is a threading hook, short hook 7, attached. Whose the hook 7 forming front end 9 with the hook throat 10 (FIG.
- a positioning device 11 is shown, which, guided by the needle 3, the hook 7 also positioned laterally exactly in front of the eye 5, regardless of the needle size and whether the needle 3 is perfectly straight or slightly bent.
- the hook 7 and the positioning device 11 are in the example described about a pivot axis S pivotally connected to the pivoting device 1.
- a wire bracket 13 is further attached, which extends obliquely downwards Longitudinal leg 15 and an adjoining transverse to the needle 3 foot leg 17 comprises.
- the foot leg 17 is adjoined by a second longitudinal leg 19 lying parallel to the first longitudinal leg 15.
- the first longitudinal leg 15 may comprise at its upper end an angled connecting or fastening leg 21, with which the wire bow 13 with the pivoting device 1 is connectable.
- the wire hanger 13 or the foot leg 17 can also be fastened laterally to the threading hook 7.
- the type of attachment of the wire bracket 13 to the pivoting device 1 is neither described nor shown. It can be done by welding, gluing, clamping or other means of connection.
- the distance between the two longitudinal legs 15, 19 and the horizontal extension of the foot leg 17 is preferably greater than twice the diameter of the needle 7.
- the foot leg 17 After lowering the carrying and pivoting device 1 in the threading position, in which the hook 7 is exactly aligned in front of the eye 5 of the needle 3 (see. FIGS. 1 and 2 ), the foot leg 17 is located near the eye 5 on the needle 3. During the subsequent passage of the hook 7 through the eye 5 of the needle 3, the wire hanger 13 or its foot leg 17 under the hook 7 from the front hook end 9 away to the rear and panned down. The foot leg 17 always remains springy on the needle 3 fitting.
- the hook 7 After catching the upper thread 23, which has been positioned by suitable, not shown in the figures means before the eye 5 of the needle 3 under the hook 7, the hook 7 returns by the pivotal movement of the support and pivoting device 1 with the thread 23 back in the starting position according to FIGS. 1 and 2 and forms after a further pivoting movement and simultaneous axial raising of the support and pivoting device 1, a thread loop 25, which leads from the eye 5 in the needle 3 obliquely upwards to the hook 7.
- the also when pivoting the support and pivoting device 1 away from the needle 3 wire bracket 13 supports the two legs of the thread loop 25 at a distance from the front end 9 of the hook 7, thus preventing the thread loop 25 from sliding out of the hook 7, without the thread 23 to pinch.
- the sliding out of the upper thread 23 from the hook 7 after looping is prevented by raising the wire bar 13 or its leg 17 with the two legs 23a, 23b of the thread loop 25 with respect to the hook 7 and thus the angle between the thread loop 25 and the hook 7 is substantially reduced.
- the thread loop 25 between the foot leg 17 and the hook throat 10 extends approximately horizontally.
- FIGS. 7a to 7d the process of threading is shown again schematically.
- the hook 7 is spaced from the eye 5.
- the moving on a trajectory foot leg 17 of the wire bracket 13 (the latter in the FIGS. 7a to 7d omitted for better clarity) is already slightly springy on the needle 3.
- the foot leg 17 is retained by the needle 3, he remains essentially at the in Figure 7a position ( FIG. 7b ).
- the needle thread 23 is already in the hook throat 10. It may be inserted by hand or fed by other suitable means.
- FIG. 7c the threading hook 7 has moved back through the eye 5 and pulled the thread 23 as a thread loop 25 through the eye 5.
- the leg 17 of the foot has been released from the needle 3 during retraction of the hook 7 and now supports the thread loop 25 from below.
- the foot leg 17 also moves upwards and supports the thread loop 25 in such a way that, for the time being, it can not fall out of the hook throat 10. The latter takes place only at the end of the upward movement of the support and pivoting device 1, before it enters the rest position.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Description
Gegenstand der Erfindung ist eine Vorrichtung zum Sichern der Oberfadenschlaufe nach dem Einfädeln gemäss Oberbegriff des Patentanspruchs 1.The invention relates to a device for securing the upper thread loop after threading according to the preamble of
Seit Jahrzehnten sind handbetätigte oder vollautomatisch arbeitende Einfädelvorrichtungen zum Einfädeln des Oberfadens einer Nähmaschine durch das Öhr der Nähnadel bekannt. Beim Einfädeln wird der Oberfaden mittels eines Einfädel- oder Fanghakens, welcher durch das Öhr der Nadel geführt wird, gefangen und eine Schlaufe hinter dem Nadelöhr gebildet. Diese Fadenschlaufe kann später von Hand erfasst und das lose Ende durchs Öhr gezogen werden. Bei dieser Manipulation besteht latent die Gefahr, dass beim Erfassen der verhältnismässig kurzen, das Nadelöhr überragenden Schlaufe oder durch eine Bewegung des Fadenhebels, die Schlaufe wieder aus dem Nadelöhr herausgezogen wird und dadurch der Einfädelvorgang wiederholt werden muss.For decades, manually operated or fully automatic threading devices for threading the upper thread of a sewing machine through the eye of the sewing needle are known. When threading the upper thread is caught by means of a threading or fishing hook, which is guided through the eye of the needle, and formed a loop behind the needle eye. This thread loop can later be grasped by hand and the loose end pulled through the eye. In this manipulation there is a latent danger that upon detection of the relatively short, the needle eye superior loop or by a movement of the thread lever, the loop is pulled out of the needle eye again and thus the threading must be repeated.
Um dies zu verhindern, ist aus der
Eine Aufgabe der vorliegenden Erfindung ist die Schaffung einer technisch einfach aufgebauten funktionssicheren Vorrichtung zum Sichern der Oberfadenschlaufe nach deren Bildung durch den Einfädelhaken.An object of the present invention is to provide a functionally reliable functionally reliable device for securing the upper thread loop after its formation by the Einfädelhaken.
Gelöst wird diese Aufgabe durch eine Vorrichtung mit den Merkmalen des Patentanspruchs 1. Vorteilhafte Ausgestaltungen der Vorrichtung sind in den abhängigen Ansprüchen umschrieben.This object is achieved by a device having the features of
Es gelingt mit einem an der Trag- und Schwenkvorrichtung für den Einfädelhaken befestigten Drahtbügel ohne Zuhilfenahme einer Kulisse, die Fadenschlaufe während deren Bildung durch den Einfädelhaken zu sichern, d.h. ein Abwerfen der Fadenschlaufe vor deren vollständigen Ausbildung zu verhindern. Der Drahtbügel liegt nach dem Einfädelvorgang und dem Nach-oben-Fahren des Einfädelhakens ausserhalb des Nähbereichs und ist trotz seiner filigranen Ausbildung geschützt vor Beschädigung.It succeeds with a fixed to the support and pivoting device for the threading hooks without the aid of a backdrop to secure the loop of thread during their formation by the threading hook, ie to prevent a dropping of the loop of thread before their complete training. The wire hanger is after the Threading and the upward driving of the threading hook outside the sewing area and is protected despite its filigree training from damage.
Anhand eines illustrierten Ausführungsbeispiels wird die Erfindung näher erläutert. Es zeigen:
Figur 1- einen Vertikalschnitt durch die Schwenkvorrichtung mit dem Einfädelhaken unmittelbar vor Beginn des Einfädelvorgangs,
- Figur 2
- eine perspektivische Ansicht der Einfädelvorrichtung und der Nadel unmittelbar vor dem Einfädelvorgang,
Figur 3- einen Vertikalschnitt durch die Schwenkvorrichtung mit dem Einfädelhaken nach dem Fangen des Oberfadens,
- Figur 4
- eine perspektivische Ansicht der Einfädelvorrichtung und der Nadel nach dem Fangen des Oberfadens,
Figur 5- einen Vertikalschnitt durch die Einfädelvorrichtung mit ausgezogener Oberfadenschlaufe,
- Figur 6
- eine perspektivische Darstellung der Einfädelvorrichtung mit ausgezogener Oberfadenschlaufe und
- Figuren 7a bis 7d
- vier sich folgende Hakenstellungen während des Einfädelns des Oberfadens.
- FIG. 1
- a vertical section through the pivoting device with the threading hook immediately before the beginning of the threading process,
- FIG. 2
- a perspective view of the threading device and the needle immediately before the threading,
- FIG. 3
- a vertical section through the pivoting device with the Einfädelhaken after catching the upper thread,
- FIG. 4
- a perspective view of the threading device and the needle after catching the upper thread,
- FIG. 5
- a vertical section through the threading device with undressed needle thread loop,
- FIG. 6
- a perspective view of the threading device with undressed needle thread loop and
- FIGS. 7a to 7d
- four following hook positions during the Threading the upper thread.
Mit Bezugszeichen 1 ist eine Trag- und Schwenkvorrichtung 1 bezeichnet. Diese ist im Oberarm einer nicht dargestellten Nähmaschine um eine vertikale Schwenkachse schwenkbar gehalten. Die Schwenkvorrichtung 1 ist zudem in vertikaler Richtung aus einer angehobenen Ruhestellung (keine Abb.) in eine abgesenkte Einfädelstellung gemäss
An der Schwenkvorrichtung 1 ist weiter ein Drahtbügel 13 befestigt, der einen schräg nach unten verlaufenden Längsschenkel 15 und einen daran anschliessenden quer zur Nadel 3 verlaufenden Fussschenkel 17 umfasst. Im dargestellten Beispiel schliesst an den Fussschenkel 17 ein parallel zum ersten Längsschenkel 15 liegender zweiter Längsschenkel 19 an. Der erste Längsschenkel 15 kann an seinem oberen Ende einen abgewinkelten Anschluss- oder Befestigungsschenkel 21 umfassen, mit dem der Drahtbügel 13 mit der Schwenkvorrichtung 1 verbindbar ist. Alternativ kann der Drahtbügel 13 bzw. der Fussschenkel 17 auch seitlich des Einfädelhakens 7 befestigt sein. Die Art der Befestigung des Drahtbügels 13 an der Schwenkvorrichtung 1 ist weder beschrieben noch dargestellt. Sie kann durch Schweissen, Kleben, Klemmen oder andere Verbindungsmittel erfolgen. Der Abstand der beiden Längsschenkel 15,19 bzw. die horizontale Ausdehnung des Fussschenkels 17 ist vorzugsweise grösser als der doppelte Durchmesser der Nadel 7.With
On the
Nachfolgend wird die Funktionsweise der Vorrichtung näher erläutert. Nach dem Absenken der Trag- und Schwenkvorrichtung 1 in die Einfädelposition, in welcher der Haken 7 exakt ausgerichtet vor dem Öhr 5 der Nadel 3 liegt (vgl.
Sobald die Trag- und Schwenkvorrichtung 1 mit der daran hängenden Fadenschlaufe 25 noch weiter nach oben gegen die Ruhestellung verfahren wird (vgl.
Ist die Zugkraft zu gering, bleibt die Fadenschlaufe 25 bis in die Ruhestellung im Haken 7 hängen. Die Fadenschlaufe 25 kann nun mit zwei Fingern vom Haken 7 gezogen werden oder es kann direkt angenäht werden, ohne die Fadenschlaufe 25 von Hand aus dem Haken 7 zu ziehen. Ist das Fadenende 23b vor dem Einlegen des Fadens 23 in den Haken 7 sehr kurz oder wird sehr kurz geschnitten, kann die Fadenschlaufe 25 beim Hochfahren des Einfädlers ausgezogen werden. Meist bleibt auch dann das Fadenende 23b im Haken 7 hängen und es kann trotzdem direkt angenäht werden.As soon as the carrying and swiveling
If the tensile force is too low, the
In den
In
In
Claims (5)
- A device for securing the needle thread loop (25) after threading the needle thread (23) into the eye (5) of the needle (3) of a sewing machine, having a wire bracket (13) fastened to the support and pivot device (1) for a threading hook (7), said wire bracket comprising a foot leg extending approximately transversely to the needle (3) which lies in a vertical position,
characterized in that
the wire bracket (13) is arranged with respect to the threading hook (7) such that its foot leg (17) is spaced apart from and below the threading hook (7), such that the needle thread loop (25) pulled through the eye (5) of the needle (3) is supported from below by the foot leg (17) between the eye (5) of the needle (3) and the threading hook (7) and thereby is prevented from sliding out of the groove (10) of the threading hook (7). - The device according to claim 1, characterized in that the foot leg (17) is arranged such as to be able to be pivoted on a trajectory at a distance from and around the front end (9) of the threading hook (7).
- The device according to any one of claims 1 or 2, characterized in that the wire bracket (13) is fastened above or beside the threading hook (7).
- The device according to claim 3, characterized in that the foot leg (17) of the wire bracket (13) is in front of the hook grove (10) of the threading hook (7) in the position of rest and after the formation of the needle thread loop (25).
- The device according to any one of claims 1 to 4, characterized in that the foot leg (17) is held on one side or both sides by the wire bracket (13).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH12482005 | 2005-07-25 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1749917A1 EP1749917A1 (en) | 2007-02-07 |
EP1749917B1 true EP1749917B1 (en) | 2013-09-25 |
Family
ID=37496666
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06405182.4A Not-in-force EP1749917B1 (en) | 2005-07-25 | 2006-04-27 | System for securing the needle thread after threading |
Country Status (2)
Country | Link |
---|---|
US (1) | US7293513B2 (en) |
EP (1) | EP1749917B1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1763603A1 (en) * | 2004-07-05 | 2007-03-21 | Inbro Co., Ltd | Needle threading machine |
WO2011038532A1 (en) * | 2009-09-29 | 2011-04-07 | 吴渭水 | Fast threading machine needle apparatus |
US10303658B2 (en) * | 2013-11-25 | 2019-05-28 | Dropbox, Inc. | Generating and sharing metadata for indexing synchronized content items |
JP6386241B2 (en) | 2014-03-11 | 2018-09-05 | 蛇の目ミシン工業株式会社 | Sewing machine with threading device |
US20160364426A1 (en) * | 2015-06-11 | 2016-12-15 | Sap Se | Maintenance of tags assigned to artifacts |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2530768A (en) * | 1949-09-26 | 1950-11-21 | Hickey James | Needle threader |
US4649843A (en) * | 1984-07-19 | 1987-03-17 | Tokyo Juki Industrial Co., Ltd | Sewing machine |
JPH03141986A (en) * | 1989-10-27 | 1991-06-17 | Brother Ind Ltd | Thread inserting device for sewing machine |
CH683849A5 (en) * | 1990-05-03 | 1994-05-31 | Mefina Sa | Device to have a handle of a thread through the eye of a sewing needle and sewing machine equipped with such a device. |
US5474796A (en) * | 1991-09-04 | 1995-12-12 | Protogene Laboratories, Inc. | Method and apparatus for conducting an array of chemical reactions on a support surface |
US6017696A (en) * | 1993-11-01 | 2000-01-25 | Nanogen, Inc. | Methods for electronic stringency control for molecular biological analysis and diagnostics |
US6051380A (en) * | 1993-11-01 | 2000-04-18 | Nanogen, Inc. | Methods and procedures for molecular biological analysis and diagnostics |
US6068818A (en) * | 1993-11-01 | 2000-05-30 | Nanogen, Inc. | Multicomponent devices for molecular biological analysis and diagnostics |
JP3335491B2 (en) * | 1994-12-26 | 2002-10-15 | ブラザー工業株式会社 | Sewing machine threading device |
US6001311A (en) * | 1997-02-05 | 1999-12-14 | Protogene Laboratories, Inc. | Apparatus for diverse chemical synthesis using two-dimensional array |
EP1256648B1 (en) * | 2001-04-30 | 2007-03-07 | Fritz Gegauf AG | Device for inserting a needle thread through the eye of a sewing machine needle |
JP4039099B2 (en) * | 2002-03-28 | 2008-01-30 | ブラザー工業株式会社 | sewing machine |
JP4272008B2 (en) * | 2003-07-31 | 2009-06-03 | 蛇の目ミシン工業株式会社 | Sewing machine threading device and sewing machine equipped with threading device |
-
2006
- 2006-04-27 EP EP06405182.4A patent/EP1749917B1/en not_active Not-in-force
- 2006-06-21 US US11/425,590 patent/US7293513B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
EP1749917A1 (en) | 2007-02-07 |
US7293513B2 (en) | 2007-11-13 |
US20070017424A1 (en) | 2007-01-25 |
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