EP1613803B1 - Sewing or embroidery machine - Google Patents
Sewing or embroidery machine Download PDFInfo
- Publication number
- EP1613803B1 EP1613803B1 EP04721794.8A EP04721794A EP1613803B1 EP 1613803 B1 EP1613803 B1 EP 1613803B1 EP 04721794 A EP04721794 A EP 04721794A EP 1613803 B1 EP1613803 B1 EP 1613803B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gripper
- hook
- sewing
- drive
- bobbin
- 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.)
- Expired - Lifetime
Links
- 238000009958 sewing Methods 0.000 title claims description 48
- 230000002441 reversible effect Effects 0.000 claims 1
- 210000000245 forearm Anatomy 0.000 description 20
- 230000008859 change Effects 0.000 description 17
- 239000000463 material Substances 0.000 description 4
- 230000000007 visual effect Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004091 panning Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B57/00—Loop takers, e.g. loopers
- D05B57/08—Loop takers, e.g. loopers for lock-stitch sewing machines
- D05B57/10—Shuttles
- D05B57/14—Shuttles with rotary hooks
- D05B57/143—Vertical axis type
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B57/00—Loop takers, e.g. loopers
- D05B57/08—Loop takers, e.g. loopers for lock-stitch sewing machines
- D05B57/10—Shuttles
- D05B57/14—Shuttles with rotary hooks
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B59/00—Applications of bobbin-winding or -changing devices; Indicating or control devices associated therewith
- D05B59/04—Devices for changing the bobbin
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B73/00—Casings
Definitions
- the invention relates to a sewing or embroidery machine according to the preamble of patent claim 1.
- the very low supply of bobbin thread in relation to the outside of the sewing machine in any amount of available upper thread forces the operator of a sewing or embroidery machine at short time intervals to remove the bobbin from the gripper in the forearm, flatbed or base of the sewing machine and a full to replace.
- the sewing material has to be lifted from the needle plate to replace the bobbin, and the bobbin is removed from the gripper with little or no visual contact, and the new spool is inserted again later.
- the gripper is pivotable about the main drive shaft, whereby the lying under the throat plate gripper can be made accessible from the side to change the coil. Since the axis of rotation of the gripper and that of the main shaft do not intersect, but cross each other at a distance, the gripper performs a pivoting movement on a much larger radius than is the case with intersecting axes. In a sewing machine with free arm very little space is available in this, which is why this arrangement can not be used there is.
- an automatic bobbin changer for a flatbed sewing machine in which an empty bobbin, together with the bobbin case, is removed from the gripper with a handling device movable on a curved path, fed to a revolver carrying a plurality of bobbins with bobbins, and then a bobbin with a filled bobbin taken over and brought to the gripper, this device can be used exclusively in commercial machines.
- a sewing machine which has a rotatably received in a pivot bearing element main shaft with a coupled via a bevel gear to the end of the main shaft gripper.
- the pivot bearing element is deflected about a vertical axis extending in the sewing machine neck.
- the arrangement of the gripper with the gripper shaft on a pivoting device makes it possible to pivot it for the bobbin change from its poorly accessible working position in an optimally accessible from the outside coil change position.
- the gripper itself remains in a preferred embodiment of the invention, even during the pivoting movement always in meshing, ie positive contact with the drive, so that after the bobbin change the gripper again assumes exactly the same rotational shaft position as before the bobbin change.
- Another advantage of the invention is that after the production of the sewing machine, the adjustment of the gripper with respect to the needle with minimal effort is possible. Also, a readjustment, for example after a machine revision, effortlessly feasible.
- the technical effort for the realization of the pivotal movement of the gripper is extremely small and is essentially limited to a pivot arm which is pivotable about a fixed or rotating axis in the machine housing substantially free of play and carries the gripper.
- the gripper can also be arranged in the direction of sewing behind the needle for household sewing machines, analogous to industrial sewing machines. This arrangement allows a much better stitch quality and stitch stability.
- a much larger gripper ie a gripper into which a much larger bobbin with eg twice the amount of thread can be used to use.
- the inventive pivotable gripper also allows sewing long stitches, eg for stapling. By slightly pivoting away the gripper can not be detected when needle piercing the upper thread and is therefore pulled out of the needle again from the fabric and thus "skipped" a stitch.
- the slight deflection of the gripper which is necessary for this measure, makes it possible to produce in a simpler way than previously excessive stitches, without, for example, the needle bar off the drive and again must be latched.
- FIG. 1 To better illustrate the invention is in figure 1 in a simplified representation of a household sewing machine 1 shown.
- This comprises a base plate 3, a forearm or free arm 5 arranged at a distance therefrom, a machine upper part 7 which is connected to the base plate 3 via a vertical column 11 which contains drive elements such as the motor M and a machine control C. Further, a needle bar 9, a partially cut flap 13, which provides access to a rotating gripper 15 from the operator side, shown on the lower arm 5.
- the gripper 15 with a bobbin case 17, as in a sewing machine 1 according to FIG. 1 is used, shown.
- a needle 19 is located in front of the presser foot rod 18.
- the flap 13 is open, so that from the operating side, ie from the right, the gripper 15 rotatably mounted about a horizontal axis A and the bobbin case 17 inserted therein are visible and accessible , The bobbin lies in the bobbin case 17 and is not visible in the figures.
- a driven bevel gear is shown, which is placed on the end of the main shaft 23 of the sewing machine 1 in the lower arm 5.
- the main shaft 23 is rotated by the drive motor M, which in FIG. 1 schematically represented by a circle, driven.
- the main shaft 23 is rotatably mounted in the lower arm 5.
- a servomotor flanged to the back of the gripper 15 may be (not shown).
- the gripper shaft 27 is rotatably mounted about the axis A.
- a drive bevel gear 29 which meshes with the teeth of the driven bevel gear 21, that is in engagement.
- the gripper carrier 25 is pivotable about a preferably perpendicular to the axis A of the gripper shaft 27 pivot axis B in the direction of the arrows S.
- the pivot axis B falls in the examples according to the FIGS. 2 to 13 with the rotation axis C of the main shaft 23 together.
- the suspension and pivotal mounting of the gripper carrier 25, which may have the shape of a "U" is not shown in detail for the sake of clarity.
- the needle 19 seen in the sewing direction P pierces the side of the gripper front with the spool removal opening into the material to be sewn (the latter not shown).
- This arrangement common in household sewing machines is therefore chosen so that the bobbin case 17 can be removed from the operator's side out of the lower arm 5 without having to remove the sewing material.
- FIG. 3 shows the gripper 15 after pivoting about the axis B in the counterclockwise direction by about 20 °.
- the Bobbin case 17 with the coil 26 therein has already been removed from the gripper 15 in the direction of the arrow Q.
- the gripper 15 together with the drive bevel gear 29 remains in meshing engagement with the output bevel gear 21 on the main shaft 23. This ensures that the rotational position is at any time after pivoting back of the gripper 15 into the working position X (FIG. FIG. 2 ) assumes the position of the gripper 15 with respect to the needle 19 taken before the pivotal movement.
- the pivotal movement of the gripper 15 together with its drive members in the bobbin change position Y can be done by reversing the direction of rotation of the main shaft 23, for example by turning the handwheel 31 or controlled by the electronic control C by the drive motor M. To trigger this pivoting movement, no further technical devices are necessary.
- In the working position X of the gripper 15 and the gripper carrier 25 abuts against a stop 33. It is pressed against the stop 33 by the torque acting on the drive bevel gear 29.
- a suitable locking device (not shown) can ensure the position of the gripper 15 in the working position X.
- the gripper 15 is in turn arranged behind the needle 19 and the drive bevel gear 29 of the gripper shaft 27 is located directly on the back of the gripper 15.
- the gripper 15 and the bobbin case 17 is pivoted out of the cross section of the lower arm 5 and is optimally accessible in the operating area of the sewing machine. 1
- the fifth embodiment according to Fig. 10/11 shows a gripper 15 which oscillates or revolves around a vertically disposed gripper rotation axis A.
- a lid is inserted in the throat plate above the gripper 15, which lid releases an opening in order to lift the spool out of the gripper 15.
- this lid is no longer necessary in the needle plate because the gripper 15 is pivotable about the axis of rotation B of the gripper carrier 25 in the counterclockwise direction by about 280 ° or clockwise by about 80 ° and then easily accessible from the front, as in the first embodiments is.
- a rotating gripper 15 is in the sixth embodiment according to Fig. 12/13 seen. Due to the displacement of the drive bevel gear 29 on the gripper shaft 27 directly to the back of the gripper 15 of the gripper 15 is partially pivoted out of the forearm 5 after pivoting about 280 ° or about 80 °. The bobbin case 17 can thus, without having to reach into the interior of the forearm 5, are detected. Alternatively, a gripper 15 could be used, in which the coil is not located in a bobbin case 17 and thus is directly lifted out of the gripper 15.
- the drive of the gripper 15 and the drive bevel gear 29 on the gripper shaft 27 is no longer directly via a driven bevel gear 21 on the main shaft 23, but the driven bevel gear 21 is parallel to the main shaft 23 and is driven by a toothed belt 35.
- the gripper carrier 25 here not only carries the gripper 15 with the drive bevel gear 29, but he also carries the Abtriebskegelrad 21.
- On the main shaft 23 sits a driven pinion 37 which transmits the drive torque to the drive gear 39 via a toothed belt 39.
- the timing belt 35 could also be replaced by an intermediate.
- the drive pinion 39 is rotatably connected to the driven bevel gear 21, which - as the gripper shaft 27 and the drive bevel gear 29 - is mounted on the gripper carrier 25.
- the pivot axis B of the gripper carrier 25 is in turn in the axis of rotation C of the main shaft 23. Since the axis of rotation C of Abreteskegelrads 21 is disposed at a distance a from the axis of rotation B, the gripper 15 now pivots on a much larger circular arc and is after a pivoting movement of about 260 ° or about 100 ° outside the forearm 5 and is therefore optimally accessible.
- a toothed belt 45 transmits from the first sprocket 41, the drive torque of the drive shaft 23 to a second sprocket 43, the rotationally fixed on the Gripper shaft 27 is seated.
- the distance b between the pivot axis B of the gripper carrier 25 to the axis of rotation A of the gripper 15 causes when pivoting the here about a vertical axis A rotating gripper 15 is completely transported out of the forearm 5 and so the optimal accessibility to the bobbin case 17 and Coil allows.
- the pivoting of the gripper 15 can be effected by reversing the direction of rotation of the main shaft 23 in the other embodiments.
- the swinging back is done by reversing the direction of rotation, ie in the normal direction of rotation.
- Ausschwenkière example by a mechanical connection between the flap 13 on the lower arm 5 and the gripper carrier 15 is effected.
- FIGS. 14 and 15 is a possible embodiment of an automatic swinging out of the gripper 15 when opening the flap 13 is shown.
- a the flap 13 with the gripper carrier 25 connecting one-armed lever 47 pivots when opening the flap 13, the gripper 15 simultaneously out of the Umterarm and when closing the flap 13 back.
- FIG. 165 and 17 is such a drive shown.
- An electric motor 53 on whose output shaft a pinion 51 is seated, is in meshing connection with a toothed segment 49 which is fixedly connected to the gripper carrier 25.
- the activation of the electric motor 53 can take place via the machine control C, or a button 55 provided for this purpose on the control panel or by a switch (not visible) connected to the flap 13.
- Bevel gear units have been described in the examples. Other suitable transmissions could be used.
- the operating position X and the change position Y are shown in the figures. However, it is also possible to remove the coil 26 or the bobbin case 17 in an intermediate position or eject and use the full coil 26 in a different angular position. In all embodiments, it is ensured by suitable sensors that with the beginning of the pivoting movement of the gripper carrier 25, the drive of the needle is interrupted.
- the drive of the gripper, at the back of a pinion is mounted directly from a Timing belt connected to the drive.
- the gripper is pivoted with the drive pinion attached thereto and the output pinion on the drive of the machine retains its position.
- the relative movement between the output pinion for the drive belt and the drive pinion is absorbed by an entanglement of the toothed belt (not shown).
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Description
Gegenstand der Erfindung ist eine Näh- oder Stickmaschine gemäss Oberbegriff des Patentanspruchs 1.The invention relates to a sewing or embroidery machine according to the preamble of
Der sehr geringe Vorrat an Unterfaden im Verhältnis zu dem ausserhalb der Nähmaschine in beliebiger Menge verfügbaren Oberfaden zwingt die Bedienungsperson einer Näh- oder Stickmaschine in kurzen zeitlichen Abständen, die Unterfadenspule aus dem Greifer im Unterarm, Flachbett oder Sockel der Nähmaschine zu entnehmen und durch eine volle zu ersetzen. Bei einer Nähmaschine mit um eine vertikale Achse rotierendem oder oszillierendem Greifer muss zum Auswechseln der Unterfadenspule das Nähgut von der Stichplatte abgehoben und die Spule ohne oder mit geringem Sichtkontakt aus dem Greifer herausgelöst und später die neue Spule wieder in diesen eingesetzt werden. Auch bei Greifern, die um eine horizontale Achse rotieren oder oszillieren, setzt das speditive Auswechseln der Spule eine gewisse Fertigkeit voraus, obwohl das Nähgut für den Zugriff zum Greifer weniger störend wirkt als beim erstgenannten Beispiel. Dafür ist jedoch die Sicht auf den Greifer während des Spulenwechselprozesses erschwert. Die engen Raumverhältnisse und der meist sehr kleine Öffnungsquerschnitt im Unterarm, durch welchen mit zwei Fingern die Spulenkapsel mit der darin liegenden Spule aus dem Greifergehäuse herausgehoben werden kann, erschwert zudem den Einsatz von Unterfadenspulen mit einer grösseren Fadenmenge.The very low supply of bobbin thread in relation to the outside of the sewing machine in any amount of available upper thread forces the operator of a sewing or embroidery machine at short time intervals to remove the bobbin from the gripper in the forearm, flatbed or base of the sewing machine and a full to replace. In the case of a sewing machine with a gripper rotating or oscillating about a vertical axis, the sewing material has to be lifted from the needle plate to replace the bobbin, and the bobbin is removed from the gripper with little or no visual contact, and the new spool is inserted again later. Even with grippers that rotate or oscillate about a horizontal axis, the speedy replacement of the spool requires a certain degree of skill, although the material to be sewn less disturbing for access to the gripper than the first example. However, the view of the gripper during the bobbin changing process is more difficult. The narrow space and the usually very small opening cross-section in the forearm, through which the bobbin case with the coil located therein can be lifted out of the hook housing with two fingers, also complicates the use of lower thread bobbins with a larger amount of thread.
Dieser Nachteil ist allen Nähmaschinen eigen, sowohl den Haushaltnähmaschinen als auch den Industrienähmaschinen, bei denen aus wirtschaftlichen Gründen ohnehin ein schneller Spulenwechsel notwendig ist.This disadvantage is inherent in all sewing machines, both household sewing machines and industrial sewing machines where, for economic reasons, a quick bobbin change is necessary anyway.
Für Industrie- oder Gewerbenähmaschinen sind deshalb bereits automatische Spulen- oder Greiferwechsler-Systeme bekannt geworden.For industrial or business sewing machines automatic coil or gripper changer systems are therefore already known.
Aus der
Aus der
Aus der
Aus der
Aufgabe der vorliegenden Erfindung ist die Schaffung einer Näh- oder Stickmaschine, welche das einfache Auswechseln der leeren Unterfaden-Spule durch eine volle Spule oder einer Spule mit andersfarbigem Faden ohne Einsatz eines aufwendigen Handling-Gerätes ermöglicht. Eine weitere Aufgabe der Erfindung besteht darin, dass die das einfache Auswechseln der Unterfadenspule ermöglichende Vorrichtung innerhalb eines Freiarms einer Haushaltnähmaschine angeordnet werden kann.Object of the present invention is to provide a sewing or embroidery machine, which allows easy replacement of the empty bobbin coil by a full bobbin or a coil with different colored thread without the use of a complex handling device. Another object of the invention is that the device enabling easy replacement of the bobbin can be arranged within a free arm of a household sewing machine.
Gelöst wird diese Aufgabe durch eine Näh- oder Stickmaschine gemäss den Merkmalen des Patentanspruchs 1.This object is achieved by a sewing or embroidery machine according to the features of
Die Anordnung des Greifers mit der Greiferwelle auf einer Schwenkvorrichtung ermöglicht es, diesen für den Spulenwechsel aus seiner schlecht zugänglichen Arbeitsstellung in eine von aussen optimal zugängliche Spulen-Wechselstellung zu verschwenken. Der Greifer selbst bleibt in einer bevorzugten Ausführungsform der Erfindung auch während der Schwenkbewegung stets in kämmendem, d.h. formschlüssigen Kontakt mit dessen Antrieb, so dass nach dem Spulenwechsel der Greifer wieder exakt dieselbe Drehwirikellage einnimmt wie vor dem Spulenwechsel.
Ein weiterer Vorteil der Erfindung besteht darin, dass nach der Herstellung der Nähmaschine die Justierung des Greifers bezüglich der Nadel mit geringstem Aufwand möglich ist. Auch ist eine Nachjustierung, beispielsweise nach einer Maschinenrevision, mühelos durchführbar. Der technische Aufwand für die Realisierung der Schwenkbewegung des Greifers ist äusserst klein und beschränkt sich im wesentlichen auf einen Schwenkarm, der um eine feste oder rotierende Achse im Maschinengehäuse im wesentlichen spielfrei schwenkbar ist und den Greifer trägt.
Durch den Einsatz einer schwenkbaren Greiferlagerung kann auch für Haushaltnähmaschinen, analog zu den Industrienähmaschinen, der Greifer in Nährichtung hinter der Nadel angeordnet werden. Diese Anordnung ermöglicht eine wesentlich bessere Stichqualität und Stichsicherheit. Zusätzlich lässt sich bei dieser Anordnung ein wesentlich grösserer Greifer, d.h. ein Greifer, in den eine wesentlich grössere Unterfadenspule mit z.B. zu doppelter Fadenmenge eingesetzt werden kann, verwenden.The arrangement of the gripper with the gripper shaft on a pivoting device makes it possible to pivot it for the bobbin change from its poorly accessible working position in an optimally accessible from the outside coil change position. The gripper itself remains in a preferred embodiment of the invention, even during the pivoting movement always in meshing, ie positive contact with the drive, so that after the bobbin change the gripper again assumes exactly the same rotational shaft position as before the bobbin change.
Another advantage of the invention is that after the production of the sewing machine, the adjustment of the gripper with respect to the needle with minimal effort is possible. Also, a readjustment, for example after a machine revision, effortlessly feasible. The technical effort for the realization of the pivotal movement of the gripper is extremely small and is essentially limited to a pivot arm which is pivotable about a fixed or rotating axis in the machine housing substantially free of play and carries the gripper.
Through the use of a pivoting gripper bearing, the gripper can also be arranged in the direction of sewing behind the needle for household sewing machines, analogous to industrial sewing machines. This arrangement allows a much better stitch quality and stitch stability. In addition, in this arrangement, a much larger gripper, ie a gripper into which a much larger bobbin with eg twice the amount of thread can be used to use.
Der erfindungsgemässe schwenkbare Greifer ermöglicht weiter das Nähen langer Stiche, z.B. zum Heften. Durch geringfügiges Wegschwenken des Greifers kann beim Einstich der Nadel der Oberfaden nicht erfasst werden und wird folglich von der Nadel wieder aus dem Nähgut herausgezogen und auf diese Weise ein Stich "übersprungen". Die geringfügige Auslenkung des Greifers, die für diese Massnahme notwendig ist, erlaubt es, auf einfachere Weise als bisher überlange Stiche zu erzeugen, ohne dass dazu beispielsweise die Nadelstange vom Antrieb aus- und wieder eingeklinkt werden muss.The inventive pivotable gripper also allows sewing long stitches, eg for stapling. By slightly pivoting away the gripper can not be detected when needle piercing the upper thread and is therefore pulled out of the needle again from the fabric and thus "skipped" a stitch. The slight deflection of the gripper, which is necessary for this measure, makes it possible to produce in a simpler way than previously excessive stitches, without, for example, the needle bar off the drive and again must be latched.
Anhand illustrierter Ausführungsbeispiele wird die Erfindung näher erläutert. Es zeigen
Figur 1- eine Ansicht einer Haushalt-Nähmaschine mit einem Freiarm von der Bedienerseite mit teilweise aufgeschnittener Klappe am Unterarm,
- Figur 2
- einen Vertikalschnitt durch den Unterarm in der Nähebene Schnitt E-E mit einem umlaufenden Greifer mit horizontaler Drehachse in Arbeitsstellung, Transporteur weggelassen,
Figur 3- einen Querschnitt durch den Unterarm mit dem Greifer in
Figur 2 in Spulenwechselstellung Y, - Figur 4
- einen Querschnitt durch den Unterarm mit einem hinter der Nadel (in der Figur links der Nadel) liegenden Greifer mit horizontaler Drehachse,
Figur 5- einen Querschnitt durch den Unterarm mit dem Greifer in
Figur 4 in Spulenwechselstellung Y, - Figur 6
- einen Vertikalschnitt durch den Unterarm in der Nähebene mit einem umlaufenden Greifer mit horizontaler Drehachse in Arbeitsstellung in einer weiteren Ausgestaltung der Erfindung,
Figur 7- einen Querschnitt durch den Unterarm mit dem Greifer in
Figur 6 in Spulenwechselstellung Y, - Figur 8
- einen Querschnitt durch den Unterarm mit einem hinter der Nadel liegenden Greifer mit horizontaler Drehachse in einer weiteren Ausgestaltung der Erfindung,
Figur 9- einen Querschnitt durch den Unterarm mit dem Greifer in
Figur 8 in Spulenwechselstellung Y, - Figur 10
- einen Vertikalschnitt durch den Unterarm in der Nähebene mit einem in Arbeitsstellung um eine vertikale Achse umlaufenden Greifer,
Figur 11- einen Querschnitt durch den Unterarm mit dem Greifer in
Figur 10 in Spulenwechselstellung Y, jedoch ist das Antriebskegelrad hinter dem Greiferträger angeordnet, - Figur 12
- eine weitere Ausgestaltung der Greiferlagerung gemäss
Figur 10 in Arbeitsstellung, Figur 13- einen Querschnitt durch den Unterarm mit dem Greifer in
Figur 12 in Spulenwechselstellung Y, - Figur 14
- eine weitere Ausgestaltung der Erfindung mit um eine vertikale Achse umlaufendem Greifer mit Riemenantrieb,
Figur 15- einen Querschnitt durch den Unterarm mit dem Greifer in
Figur 14 in Spulenwechselstellung Y, - Figur 16
- eine Aufsicht auf einen umlaufenden Greifer mit vertikaler Drehachse und Riemenantrieb,
Figur 17- einen Horizontal-Querschnitt durch den Unterarm mit dem Greifer in
Figur 16 in Spulenwechselstellung Y.
- FIG. 1
- a view of a household sewing machine with a free arm from the operator side with partially cut flap on the forearm,
- FIG. 2
- a vertical section through the lower arm in the plane EE cut with a rotating gripper with horizontal axis of rotation in working position, transporter omitted,
- FIG. 3
- a cross section through the forearm with the gripper in
FIG. 2 in bobbin change position Y, - FIG. 4
- a cross section through the forearm with a behind the needle (in the figure to the left of the needle) lying gripper with a horizontal axis of rotation,
- FIG. 5
- a cross section through the forearm with the gripper in
FIG. 4 in bobbin change position Y, - FIG. 6
- a vertical section through the forearm in the proximate plane with a rotating gripper with horizontal axis of rotation in working position in a further embodiment of the invention,
- FIG. 7
- a cross section through the forearm with the gripper in
FIG. 6 in bobbin change position Y, - FIG. 8
- a cross section through the forearm with a behind the needle gripper with horizontal axis of rotation in a further embodiment of the invention,
- FIG. 9
- a cross section through the forearm with the gripper in
FIG. 8 in bobbin change position Y, - FIG. 10
- a vertical section through the forearm in the proximal plane with a in the working position about a vertical axis rotating gripper,
- FIG. 11
- a cross section through the forearm with the gripper in
FIG. 10 in bobbin change position Y, but the drive bevel gear is arranged behind the gripper carrier, - FIG. 12
- a further embodiment of the gripper storage according to
FIG. 10 in working position, - FIG. 13
- a cross section through the forearm with the gripper in
FIG. 12 in bobbin change position Y, - FIG. 14
- a further embodiment of the invention with around a vertical axis rotating gripper belt drive,
- FIG. 15
- a cross section through the forearm with the gripper in
FIG. 14 in bobbin change position Y, - FIG. 16
- a view of a rotating gripper with vertical axis of rotation and belt drive,
- FIG. 17
- a horizontal cross section through the forearm with the gripper in
FIG. 16 in bobbin change position Y.
Zur besseren Veranschaulichung der Erfindung wird in
In der vergrösserten Darstellung eines vertikalen Schnittes entlang Linie E-E in
Auf einem Greiferträger 25 ist die Greiferwelle 27 um die Achse A drehbar gelagert. Am Ende der Greiferwelle 27 sitzt ein Antriebskegelrad 29, welches mit den Zähnen des Abtriebskegelrades 21 kämmt, d.h. in Eingriff steht. Der Greiferträger 25 ist um eine zur Achse A der Greiferwelle 27 vorzugsweise rechtwinklig verlaufende Schwenkachse B in Richtung der Pfeile S schwenkbar. Die Schwenkachse B fällt in den Beispielen gemäss den
In the enlarged view of a vertical section along line EE in
On a
Im ersten Beispiel gemäss den
Im zweiten Ausführungsbeispiel gemäss den
Im dritten Ausführungsbeispiel gemäss den
Eine wesentliche Verbesserung der Zugänglichkeit des Greifers 15 und damit der Spulenkapsel 17 ergibt sich im vierten Ausführungsbeispiel gemäss den
Dort ist der Greifer 15 wiederum hinter der Nadel 19 angeordnet und das Antriebskegelrad 29 der Greiferwelle 27 liegt direkt an der Rückseite des Greifers 15. Bei der Schwenkung des Greiferträgers 25 um die Schwenkachse B, die in allen bisherigen Fällen mit der Drehachse C der Hauptwelle 23 der Nähmaschine 1 zusammenfällt, wird der Greifer 15 und die darin liegende Spulenkapsel 17 aus dem Querschnitt des Unterarm 5 herausgeschwenkt und liegt optimal zugänglich im Bedienungsbereich der Nähmaschine 1.There, the
Das fünfte Ausführungsbeispiel gemäss
Gerade bei diesem Greifertyp ist dadurch eine wesentliche Spulenvergrösserung möglich, da bei der Spulenentnahme keine Behinderung mehr durch Transporteur, Stichplatte oder Nähfuss gegeben ist.In this gripper type in particular, this makes it possible to significantly increase the size of the coil, since in the case of the removal of the coil, there is no longer any obstruction due to the feed dog, throat plate or presser foot.
Eine noch bessere Zugänglichkeit des um eine vertikale Welle A umlaufenden Greifers 15 ist im sechsten Ausführungsbeispiel Gemäss
In der siebten Ausgestaltung der Erfindung gemäss den
Im achten nicht erfindungsgemässen Ausführungsbeispiel gemäss den
Der Abstand b zwischen der Schwenkachse B des Greiferträgers 25 zur Drehachse A des Greifers 15 bewirkt, dass beim Schwenken der hier um eine vertikal liegende Achse A drehende Greifer 15 vollständig aus dem Unterarm 5 herausbefördert wird und so die optimale Zugänglichkeit zur Spulenkapsel 17 bzw. zur Spule ermöglicht.In the eighth non-inventive embodiment according to the
The distance b between the pivot axis B of the
Wie beim ersten Ausführungsbeispiel kann auch bei den übrigen Ausführungsbeispielen das Ausschwenken des Greifers 15 durch eine Drehrichtungsumkehr der Hauptwelle 23 bewirkt werden. Das Zurückschwenken erfolgt durch erneute Drehrichtungsumkehr, d.h. in die normale Drehrichtung.
Selbstverständlich ist es auch denkbar, dass die Ausschwenkbewegung beispielsweise durch eine mechanische Verbindung zwischen der Klappe 13 am Unterarm 5 und dem Greiferträger 15 bewirkt wird. In den
Weiter ist es möglich, die Schwenkbewegung des Greiferträgers 25 durch einen Elektroantrieb auszuführen. In den Figuren 165 und
Of course, it is also conceivable that the Ausschwenkbewegung example, by a mechanical connection between the
Further, it is possible to perform the pivoting movement of the
In den Beispielen wurden Kegelradgetriebe beschrieben. Es könnten auch andere geeignete Getriebe eingesetzt werden. Im weiteren sind in den Figuren jeweils die Betriebsstellung X und die Wechselstellung Y dargestellt. Es ist allerdings auch möglich, die Spule 26 oder die Spulenkapsel 17 in einer Zwischenstellung zu entnehmen oder auszuwerfen und die volle Spule 26 in einer anderen Winkelstellung einzusetzen.
In allen Ausführungsbeispielen wird durch geeignete Sensoren sichergestellt, dass mit dem Beginn der Schwenkbewegung des Greiferträgers 25 der Antrieb der Nadel unterbrochen wird.Bevel gear units have been described in the examples. Other suitable transmissions could be used. In addition, the operating position X and the change position Y are shown in the figures. However, it is also possible to remove the
In all embodiments, it is ensured by suitable sensors that with the beginning of the pivoting movement of the
In einer weiteren, nicht dargestellten Ausführungsform der Erfindung erfolgt der Antrieb des Greifers, an dessen Rücken ein Zahnritzel befestigt ist, direkt von einem Zahnriemen, der mit dem Antrieb verbunden ist. Beim Schwenken wird nur der Greifer mit dem daran befestigten Antriebsritzel geschwenkt und das Abtriebsritzel auf dem Antrieb der Maschine behält seine Position inne. Die Relativbewegung zwischen dem Abtriebsritzel für den Antriebsriemen und dem Antriebsritzel wird durch eine Verschränkung des Zahnriemens aufgenommen (keine Abbildung).In a further, not shown embodiment of the invention, the drive of the gripper, at the back of a pinion is mounted directly from a Timing belt connected to the drive. When panning only the gripper is pivoted with the drive pinion attached thereto and the output pinion on the drive of the machine retains its position. The relative movement between the output pinion for the drive belt and the drive pinion is absorbed by an entanglement of the toothed belt (not shown).
Claims (7)
- A sewing or embroidery machine comprising a hook (15) which oscillates or rotates on a hook rotational axis (A), which can be driven by a drive (M) of the sewing machine (1) and which can be pivoted under the needle (19) about a pivot axis (B) from the working position (X) into at least one bobbin changing position (Y) which is located at a distance from the working position (X) and which is easily accessible from outside, wherein the rotational axis (A) of the hook (15) and the rotational axis of a driving gear (21) intersect at a point both in the working position (X) and in the bobbin changing position (Y), wherein the driving gear (21) is mounted on one end of a main shaft (23) of the sewing machine in a lower arm (5), characterized in that the pivot axis (B) coincides with the rotational axis (C) of the main shaft (23).
- The sewing or embroidery machine according to Claim 1, characterized in that the drive connection (29) of the hook shaft (27) located between the hook (15) and the drive (M) is maintained during the pivoting movement of the hook (15) from the working position (X) into the at least one bobbin changing position (Y).
- The sewing or embroidery machine according to any one of Claims 1 to 2, characterized in that the hook (15) is supported so that it can rotate on a hook carrier (25) and can pivot with the hook carrier (25) on the pivot axis (B).
- The sewing or embroidery machine according to Claim 3, characterized in that the driving bevel gear (29) is arranged on the hook shaft (27) of the hook directly on the hook rear side in front of the pivot axis (B) or behind the pivot axis (B) and behind the hook carrier (25).
- The sewing or embroidery machine according to Claim 4, characterized in that a bobbin ejection position is formed between the working position (X) and the bobbin changing position (Y).
- The sewing or embroidery machine according to any one of Claims 3 to 5, characterized in that for pivoting the hook carrier (25), a lever (47) is arranged which connects the hook carrier (25) to the flap (13), or an electric motor (53) is provided in driving connection with the hook carrier (25) or the main shaft (23).
- The sewing or embroidery machine according to any one of Claims 3 to 6, characterized in that the rotational direction of the drive motor (M) of the sewing machine (1) is reversible for pivoting the hook carrier (25).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH6672003 | 2003-04-11 | ||
PCT/CH2004/000168 WO2004090216A1 (en) | 2003-04-11 | 2004-03-19 | Sewing or embroidery machine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1613803A1 EP1613803A1 (en) | 2006-01-11 |
EP1613803B1 true EP1613803B1 (en) | 2016-07-13 |
Family
ID=33136760
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04721794.8A Expired - Lifetime EP1613803B1 (en) | 2003-04-11 | 2004-03-19 | Sewing or embroidery machine |
Country Status (4)
Country | Link |
---|---|
US (1) | US7234403B2 (en) |
EP (1) | EP1613803B1 (en) |
JP (1) | JP5039380B2 (en) |
WO (1) | WO2004090216A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITVR20110070A1 (en) * | 2011-04-07 | 2012-10-08 | Vi Be Mac Spa | SEWING MACHINE WITH DEVICE FOR SHIFT CHANGE |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49127756A (en) * | 1973-04-14 | 1974-12-06 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US862033A (en) * | 1905-01-05 | 1907-07-30 | Edwin J Toof | Interchangeable lock and chain stitch sewing-machine. |
GB378271A (en) | 1931-11-04 | 1932-08-11 | Wallace Cranston Fairweather | Sewing machines |
US1941083A (en) * | 1930-11-15 | 1933-12-26 | Singer Mfg Co | Sewing machine |
DE581186C (en) * | 1931-10-25 | 1933-07-22 | Kochs Adler Ag | Device for holding the bobbin case of an eyeglass gripper sewing machine |
US3031989A (en) * | 1958-08-05 | 1962-05-01 | Anker Phoenix Nahmaschinen Ag | Sewing machine with ring supported bobbin |
CH538562A (en) * | 1971-07-20 | 1973-06-30 | Necchi Spa | Flat base of a sewing machine in which a hook-eyeglass unit is housed |
US4223617A (en) * | 1979-03-02 | 1980-09-23 | Kochs Adler Ag | Looptaker arrangement in sewing devices |
US5400730A (en) * | 1991-08-14 | 1995-03-28 | Moll Automatische Naehsystems Gmbh I.G. | Sewing device having a detachably mounted looper block for bobbin changing |
EP0829565A1 (en) * | 1996-09-16 | 1998-03-18 | Kinoshita Precision Industrial Co., Ltd. | A thread exchanger device for sewing machine |
DE19653296C1 (en) * | 1996-12-20 | 1998-04-02 | Zsk Stickmasch Gmbh | Sewing machine with exchangeable loopers |
BRPI0411150A (en) * | 2003-05-20 | 2006-07-11 | Martin J Rotter | flexibly heavy duty multi-head sewing machine with automatic bobbin loader |
-
2003
- 2003-03-19 US US10/552,123 patent/US7234403B2/en not_active Expired - Lifetime
-
2004
- 2004-03-19 EP EP04721794.8A patent/EP1613803B1/en not_active Expired - Lifetime
- 2004-03-19 WO PCT/CH2004/000168 patent/WO2004090216A1/en active Application Filing
- 2004-03-19 JP JP2006504156A patent/JP5039380B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49127756A (en) * | 1973-04-14 | 1974-12-06 |
Also Published As
Publication number | Publication date |
---|---|
US20070144420A9 (en) | 2007-06-28 |
JP2006522621A (en) | 2006-10-05 |
EP1613803A1 (en) | 2006-01-11 |
WO2004090216A1 (en) | 2004-10-21 |
US20060180065A1 (en) | 2006-08-17 |
JP5039380B2 (en) | 2012-10-03 |
US7234403B2 (en) | 2007-06-26 |
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