EP2192221B1 - Multiple needle sewing machine - Google Patents

Multiple needle sewing machine Download PDF

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Publication number
EP2192221B1
EP2192221B1 EP08020506.5A EP08020506A EP2192221B1 EP 2192221 B1 EP2192221 B1 EP 2192221B1 EP 08020506 A EP08020506 A EP 08020506A EP 2192221 B1 EP2192221 B1 EP 2192221B1
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EP
European Patent Office
Prior art keywords
needle
sewing
decoupled
gripper
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.)
Active
Application number
EP08020506.5A
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German (de)
French (fr)
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EP2192221A1 (en
Inventor
Klaus Stutznäcker
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.)
Naehmaschinenfabrik Emil Stutznaecker GmbH and Co KG
Original Assignee
Naehmaschinenfabrik Emil Stutznaecker GmbH and Co KG
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.)
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Publication date
Application filed by Naehmaschinenfabrik Emil Stutznaecker GmbH and Co KG filed Critical Naehmaschinenfabrik Emil Stutznaecker GmbH and Co KG
Priority to EP08020506.5A priority Critical patent/EP2192221B1/en
Priority to US12/620,183 priority patent/US8250997B2/en
Priority to CN200910225898.1A priority patent/CN101768841B/en
Publication of EP2192221A1 publication Critical patent/EP2192221A1/en
Application granted granted Critical
Publication of EP2192221B1 publication Critical patent/EP2192221B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B55/00—Needle holders; Needle bars
    • D05B55/10—Needle bars for multiple-needle sewing machines
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B55/00—Needle holders; Needle bars
    • D05B55/14—Needle-bar drives
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B55/00—Needle holders; Needle bars
    • D05B55/14—Needle-bar drives
    • D05B55/16—Needle-bar drives with provision for disengaging individual needle bars
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B69/00—Driving-gear; Control devices
    • D05B69/30—Details

Definitions

  • the invention relates to a multi-needle sewing machine, in particular Mehrnadelkettenstichnähmaschine with stitch-forming sewing elements having at least two needles and at least one gripper shaft and gripper hooks arranged thereon, wherein each a needle and a hook hook form a pair of sewing elements and wherein the needles and the hooks are driven such that they Execute chain stitches, in particular double chain stitches, in each case with a needle thread and a looper thread in a sewing material arranged on a sewing material support, preferably in a multilayer configuration.
  • the invention further relates to a method for forming a sewing pattern in a fabric, in particular in multi-layered design, in which by means of a plurality of sewing organs, namely at least one needle and a gripper, at least one needle thread and at least one looper thread connected as a chain stitch, in particular as a double chain stitch become.
  • At least one, preferably a plurality of needles can be adjusted between two positions or be adapted to predetermined sewing tasks in a simple manner ., wherein the needles participate in the sewing process in a first position and in a second position during the sewing process do not pierce the sewing material and that at least the one or the other adjustable between the two positions Needles is associated with a device for knotting the needle thread with the looper thread and / or a cutting device for the looper and / or needle thread.
  • Such a multi-needle chain stitch sewing machine has proven itself in the prior art.
  • EP 0 394 601 A1 a device for locking and releasing one or more embroidery needles in an embroidery machine or a multi-needle embroidery machine, wherein also here the individual needles are pneumatically reciprocated between two positions, so that the needle in one position is not at the embroidery and stitching process participates.
  • this prior art device has the disadvantage that nevertheless the entire mass of the quilting or embroidery needle must be moved even if this needle does not participate in the stitching or embroidery process.
  • a Dahlnadelkettenstichnähmaschine with two needle bars is known, which are each divided into three sections, wherein the sections each have a plurality of needles and both needle bars are driven in the same direction or in opposite directions via a common drive.
  • the needle bars are hereby alternately raised and lowered, so that the needles of a needle bar are dipped into the sewing material for stitching, while the needles of the second needle bar are pulled out of the sewing material.
  • the needles of the two needle bars are involved in the sewing process.
  • the movement of the two needle bars is alternating and synchronized with corresponding gripper bars below a Nähgutauflage.
  • a multi-needle sewing machine In a multi-needle sewing machine according to the invention is thus provided that the individual needles are connected to the oscillating moving drive shaft, the individual needles are decoupled from the drive .. Accordingly, it is no longer necessary in the multi-needle sewing machine according to the invention, all needles together with the needle bar oscillating - and off to move. The needles are driven directly.
  • the drive takes place, for example, via the driven, oscillatingly moving drive shaft and crank drives, which convert the rotational movement of the oscillatingly driven driven drive shaft into a translatory movement of the needles.
  • the oscillating moving drive shaft with the needle via a, in particular designed as a cam drive lever with a receptacle and a connecting rod is connectable, which connecting rod with the recording is coupled and decoupled.
  • the receptacle is provided on the cam and that the connecting rod is formed on the needle or a needle holder with a counterpart which can be latched into the receptacle.
  • the connecting rod is formed on the needle or a needle holder with a counterpart which can be latched into the receptacle.
  • here is also a kinematic reversal in the sense possible that the recording on the connecting rod and the counterpart is arranged on the cam.
  • the connecting rod is at least limited pivotally arranged around the needle, so that the connecting rod in a raised position of the needle can be decoupled from the recording or coupled to the recording. In the coupled position, the connecting rod extends in the longitudinal axis direction of the needle to ensure the greatest possible power transmission to the needle.
  • hydraulic or pneumatic cylinders which act on both sides and are individually controlled.
  • the pneumatic or hydraulic cylinder engage the connecting rod described above, wherein the connecting rod by means of the pneumatic and / or hydraulic cylinder in the direction of the oscillating moving drive shaft, especially the receptacle, displaceable and can be pulled out of this recording.
  • each needle is arranged replaceably in a holder, wherein the holder between the oscillating moving drive shaft and the needle is arranged.
  • the entire drive remains unchanged, so that subsequent adjustment measures are not required.
  • needles are provided with holders, wherein a needle is inserted into an axially aligned bore of the holder and fixed by means of a screw, in particular a grub screw.
  • the holder has a laterally arranged projection, which is fastened in a corresponding receptacle on a translationally movable carrier. In this manner, the holder of the needle can be moved by a movement mimic such that the projection is inserted into the corresponding receptacle and optionally locked.
  • the locking can be done purely mechanically or electromagnetically.
  • the gripper hooks can be decoupled from the gripper shaft. It has proved to be advantageous in each case to decouple the gripper from the gripper shaft, which cooperates with a correspondingly decoupled needle. Of course, there is also the possibility that the gripper hooks are basically driven even when individual needles are not driven. But this results in an additional consumption of looper thread and beyond possibly also the problem that excess looper thread wraps around the hook hook and / or the hook shaft and affects the function of the chain stitch sewing machine.
  • the needle thread is knotted with the looper thread at the end of the finished sewing pattern or, at least, after the last sewing pattern element, but in any case after a last stitch, before the beginning of the next sewing pattern element.
  • the needle and / or hook thread is cut after a last stitch, in particular before the beginning of the next sewing pattern element.
  • the cutting, in particular of the looper thread takes place here with a length which avoids that the looper thread is pulled out of arranged in the hook hook holes.
  • a length of the rapier thread to be cut off is provided on the part of the sewing material, which avoids that the chain stitch opens automatically.
  • the fabric preferably before the beginning of the next Nähmusterelements is moved in the sewing direction to withdraw the needle thread extending from a thread supply, before the needle thread is knotted with the looper thread and / or cut off.
  • An advantageous development of the method according to the invention also provides that a plurality of needles arranged on at least one needle bar are simultaneously coupled or decoupled. By this configuration, different sewing patterns can be sewn in a simple manner.
  • the needles are preferably hydraulically, pneumatically or electromechanically coupled or decoupled.
  • the invention provides that the needles are coupled or decoupled via a programmable controller.
  • the programmable controller runs in analogy to one or more sewing patterns.
  • FIG. 1 a machine frame 1 is shown in cross-section, which is formed from two U-shaped elements 2, which elements 2 are aligned with their legs in alignment with each other, so that a box-shaped machine frame 1 is formed.
  • the drive shafts 3 of the drive 5 oscillate, wherein the oscillating movement of the drive shafts 3 is converted into a translational movement of the needles 6.
  • the needles 6 are arranged in translational about the drive 5 movable brackets 7.
  • the brackets 7 are guided on both sides of the machine frame 1 mounted guide elements 8, wherein each guide element 8 has two legs 9, 10, each having a bore 11 which are arranged coaxially aligned and in which a sliding bearing 12 is attached.
  • Each holder 7 has at one of the needle 6 facing the end of a bore into which a plug-in element 13 is inserted, which is non-positively and / or positively held in the bore 11.
  • Each plug-in element 13 has a receiving bore for the needle 6 and a bore extending transversely to the receiving bore, into which a grub screw 14 is screwed for frictional connection with the needle 6.
  • the holder 7 has a hinge 15 which articulates two members together, wherein the first member 17 has a receptacle 18 for the holder 7 and the second member is formed as a connecting rod 16.
  • the holder 7 is screwed to the receptacle 18, wherein, for example, in the region of the holder 7, an external thread and in the region of the receptacle 18 is an internal thread.
  • the connecting rod 16 has at its free end a cylinder 19 which extends at right angles to the longitudinal axis of the connecting rod 16 with its longitudinal axis.
  • this cylinder 19 the connecting rod 16 with the drive 5, namely the cam 4 is connected.
  • the cam 4 at its end facing away from the drive shaft 3 end a semicircular receptacle 20, whose diameter substantially coincides with the diameter of the cylinder 19.
  • a spring element 21 is arranged on the cam 4, so that the cylinder 19 is clamped between the receptacle 20 and the spring element 21.
  • the spring element 21 is bent away at its free end of the receptacle 20.
  • the oscillating movement of the drive shaft 3 is translationally transmitted to the connecting rod 16 and thus to the holder 7 and the needle 6, so that the holder 7 and the needle 6 connected to the cam 4 connecting rod 16 in the holes 11th the guide member 8 performs guided movement up and down.
  • the leg 10 of the guide element 8 has a right angle to the leg 10 aligned and substantially L-shaped support 22 which carries in the region of its free end a linear motor 23, for example in the form of a pneumatic cylinder with which a sliding element 24 is movable.
  • the sliding element 24 has a direction of movement perpendicular to the longitudinal axis of the holder 7, wherein the sliding element 24 has a projection 25 which engages over the cylinder 19.
  • an undercut receptacle 26 made of a spring steel is arranged on the support 22.
  • the receptacle 26 is designed essentially in the shape of a circular arc section, wherein the diameter of the receptacle 26 substantially coincides with the diameter of the cylinder 19.
  • the 6 connecting rod 16 is moved between a position coupled to the cam 4 above the spring element 21 and a position in which the cylinder 19 is received in the receptacle 26 and consequently not with the cam 4 and thus the oscillating moving Drive shaft 3 is coupled.
  • the movement of the sliding element 24 is in this case carried out via the linear motor 23.
  • a stop 27 is additionally arranged at the free end of the support 22.
  • each needle 6 of each needle row has an oscillatingly moving drive 5 with a cam 4 and a connecting rod 16 and the associated movement device. All cams 4 are rotatably mounted on the drive shaft 3. There is also the possibility between each cam 4 and the drive shaft 3 to arrange a clutch that allows uncoupling or coupling of the individual cams 4 and thus the individual needles 6 with the drive shaft. With these embodiments, each individual or multiple needles 6 can thus be decoupled from the oscillatingly moving drive shaft 3, so that in the formation of a sewing pattern in a sewing material, not shown, the number and arrangement of the sewing pattern forming needles 6 can be controlled individually.
  • a significant advantage of this embodiment is that non-driven needles 6 are not moved during the sewing process, so that only the masses of the driven needles 6 are to be considered. Furthermore, this embodiment enables the shutdown of the machine frame 1, since the drive of the needles 6 takes place directly and not indirectly via the machine frame 1.
  • FIGS. 3 to 5 is a section of the FIGS. 1 and 2 shown device in three operating positions shown.
  • FIG. 3 shows here the decoupled position in which the cylinder 19 is disengaged from the receptacle 20, so that the cam 4 performs oscillating movements by the drive of the drive shaft 3 without the needle 6 is moved translationally in the direction of a Nähgutauflage 33.
  • the FIG. 3 moreover shows a position of the cam 4, in which a coupling or decoupling of the cylinder 19 with the receptacle 20 is possible.
  • the sliding element 24 is displaced in the direction of the linear motor 23, so that the sliding element 24 bears against the stop 27.
  • FIG. 4 shows one with the FIG. 3 coincident position of the cam 4 with extended from the linear motor 23 sliding element 24.
  • the member 16 is pivoted about the connecting rod 15 in the direction of the receptacle 20 and latched there by the spring element 21.
  • the member 16 is coupled via the cylinder 19 with the receptacle 20 of the cam 4, so that in the following the needle 6 is driven in an oscillating manner via the drive shaft 3 and the cam 4 such that the needle 6 is moved translationally in the direction of the fabric support 33 ,
  • a related position of the needle 6, in which the needle 6 engages through a bore 34 in the Nähgutauflage is in FIG. 5 shown.
  • FIGS. 3 to 5 show FIGS. 3 to 5 a gripper shaft 29 arranged thereon a hook hook 28 which is arranged interchangeable in a holder 35 which is rotatably connected to the gripper shaft 29.
  • the gripper hook 28 has a not shown in detail in a knee region cutting element, which is used to cut a thread, not shown, in particular of the needle thread, wherein it is provided that the cutting of the thread is carried out by a further pivotal movement of the hook hook 28.
  • the further pivotal movement of the hook hook 28 is to be understood that in a conventional pivotal movement of the hook hook 28 of the thread can not get into contact with the cutting element, whereas in the further pivotal movement of the thread slips into the cutting element.

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

Description

Die Erfindung betrifft eine Mehrnadelnähmaschine, insbesondere Vielnadelkettenstichnähmaschine, mit stichbildenden Nähelementen, die mindestens zwei Nadeln sowie mindestens eine Greiferwelle und daran angeordnete Greiferhaken aufweisen, wobei jeweils eine Nadel und ein Greiferhaken ein Nähelementpaar bilden und wobei die Nadeln und die Greiferhaken derart angetrieben sind, dass sie mit jeweils einem Nadelfaden und einem Greiferfaden Kettenstiche, insbesondere Doppelkettenstiche in einem auf einer Nähgutauflage angeordneten Nähgut, vorzugsweise in mehrlagiger Ausgestaltung ausführen. Die Erfindung betrifft ferner ein Verfahren zur Ausbildung eines Nähmusters in einem Nähgut, insbesondere in mehrlagiger Ausführung, bei dem mittels einer Vielzahl von Nähorganen, nämlich jeweils zumindest einer Nadel und eines Greifers, zumindest ein Nadelfaden und zumindest ein Greiferfaden als Kettenstich, insbesondere als Doppelkettenstich verbunden werden. (Siehe z. B. US-A-2005/0178307 ) Aus der EP 1 233 096 B1 ist eine Vielnadelkettenstichnähmaschine mit stichbildenden Nähelementen, die mindestens einen Nadelbalken und daran befestigte Nadeln sowie mindestens eine Greiferwelle umfassen, an welcher Greiferhaken befestigt sind, wobei die Nadeln und die Greiferhaken jeweils ein Nähelementpaar bilden und derart angetrieben sind, dass sie mit jeweils einem Nadelfaden und einem Greiferfaden Kettenstiche, insbesondere Doppelkettenstiche in einem auf einer Nähgutauflage angeordneten Nähgut, vorzugsweise in mehrlagiger Ausgestaltung ausführen. Um mit einer derartigen Vielnadelkettenstichnähmaschine in einfacher Weise zusätzliche und/oder ergänzende Muster in das Nähgut einnähen zu können bzw. diese Vielnadelkettenstichnähmaschine in einfacher Weise an vorbestimmte Nähaufgaben anpassbar auszubilden ist vorgesehen, dass zumindest eine, vorzugsweise eine Vielzahl von Nadeln zwischen zwei Stellungen verstellbar ist bzw. sind, wobei die Nadeln in einer ersten Stellung an dem Nähvorgang teilnehmen und in einer zweiten Stellung während des Nähvorgangs nicht in das Nähgut einstechen und dass zumindest der bzw. den zwischen den beiden Stellungen verstellbaren Nadeln eine Vorrichtung zum Verknoten des Nadelfadens mit dem Greiferfaden und/oder eine Schneidvorrichtung für den Greifer- und/oder Nadelfaden zugeordnet ist. Eine derartige Vielnadelkettenstichnähmaschine hat sich im Stand der Technik bewährt. Da jedoch unabhängig von den hochgestellten Nadeln sämtliche Nadeln und auch der Nadelbalken bei jedem Nähvorgang bewegt werden müssen, so dass auch die Massen der hochgestellten Nadeln bewegt werden müssen und die Anforderung besteht, dass möglichst geringe Massen bewegt werden sollen, besteht der Wunsch nach einer Kettenstichnähmaschine, die gegenüber dieser vorbekannten Vielnadelkettenstichnähmaschine verbessert ist.The invention relates to a multi-needle sewing machine, in particular Mehrnadelkettenstichnähmaschine with stitch-forming sewing elements having at least two needles and at least one gripper shaft and gripper hooks arranged thereon, wherein each a needle and a hook hook form a pair of sewing elements and wherein the needles and the hooks are driven such that they Execute chain stitches, in particular double chain stitches, in each case with a needle thread and a looper thread in a sewing material arranged on a sewing material support, preferably in a multilayer configuration. The invention further relates to a method for forming a sewing pattern in a fabric, in particular in multi-layered design, in which by means of a plurality of sewing organs, namely at least one needle and a gripper, at least one needle thread and at least one looper thread connected as a chain stitch, in particular as a double chain stitch become. (See, for example, US-A-2005/0178307 ) From the EP 1 233 096 B1 is a Vielnadelkettenstichnähmaschine with stitch-forming sewing elements comprising at least one needle bar and attached needles and at least one gripper shaft to which gripper hooks are attached, the needles and the gripper hooks each form a pair of sewing elements and are driven so that they each with a needle thread and a Hook thread chain chain stitches, in particular double chain stitches in a sewing material arranged on a Nähgutauflage, preferably in multi-layered design. In order to be able to sew additional and / or supplementary patterns into the sewing material in such a simple manner by means of such a multi-needle chain stitch sewing machine, it is provided that at least one, preferably a plurality of needles can be adjusted between two positions or be adapted to predetermined sewing tasks in a simple manner ., wherein the needles participate in the sewing process in a first position and in a second position during the sewing process do not pierce the sewing material and that at least the one or the other adjustable between the two positions Needles is associated with a device for knotting the needle thread with the looper thread and / or a cutting device for the looper and / or needle thread. Such a multi-needle chain stitch sewing machine has proven itself in the prior art. However, since all needles and also the needle bar must be moved during each sewing process, so that the masses of the raised needles must be moved and the requirement exists that the smallest possible masses are to be moved, there is a desire for a chain stitch sewing machine, regardless of the raised needles , which is improved over this prior art Vielnabekettenstichnähmaschine.

Weiterhin ist aus der bereits in der Beschreibungseinleitung der voranstehend genannten Druckschrift genannten EP 0 394 601 A1 eine Vorrichtung zum Sperren und zur Freigabe einer oder mehrerer Sticknadeln in einer Stickmaschine oder einer Mehrnadel-Stickmaschine bekannt, wobei auch hier die einzelnen Nadeln pneumatisch zwischen zwei Stellungen hin- und her bewegbar sind, so dass die Nadel in der einen Stellung nicht am Stick- und Steppvorgang teilnimmt. Es ist aber zu erkennen, dass diese vorbekannte Vorrichtung den Nachteil aufweist, dass dennoch die gesamte Masse der Stepp- oder Sticknadel auch dann bewegt werden muss, wenn diese Nadel nicht am Stepp- oder Stickvorgang teilnimmt.Furthermore, from the already mentioned in the introduction to the description of the aforementioned publication EP 0 394 601 A1 a device for locking and releasing one or more embroidery needles in an embroidery machine or a multi-needle embroidery machine, wherein also here the individual needles are pneumatically reciprocated between two positions, so that the needle in one position is not at the embroidery and stitching process participates. However, it can be seen that this prior art device has the disadvantage that nevertheless the entire mass of the quilting or embroidery needle must be moved even if this needle does not participate in the stitching or embroidery process.

Aus der US-A-5 509 365 ist ferner eine Vielnadelkettenstichnähmaschine mit zwei Nadelbalken bekannt, die jeweils in drei Abschnitte unterteilt sind, wobei die Abschnitte jeweils mehrere Nadeln aufweisen und beide Nadelbalken über einen gemeinsamen Antrieb gleichsinnig oder gegenläufig angetrieben sind. Die Nadelbalken werden hierbei alternierend angehoben und abgesenkt, so dass die Nadeln des einen Nadelbalkens zur Stichbildung in das Nähgut eingetaucht sind, während die Nadeln des zweiten Nadelbalkens aus dem Nähgut herausgezogen sind. Die Nadeln der beiden Nadelbalken sind aber am Nähvorgang beteiligt. Die Bewegung der beiden Nadelbalken ist alternierend und mit entsprechenden Greiferbalken unterhalb einer Nähgutauflage synchronisiert.From the US-A-5 509 365 Furthermore, a Vielnadelkettenstichnähmaschine with two needle bars is known, which are each divided into three sections, wherein the sections each have a plurality of needles and both needle bars are driven in the same direction or in opposite directions via a common drive. The needle bars are hereby alternately raised and lowered, so that the needles of a needle bar are dipped into the sewing material for stitching, while the needles of the second needle bar are pulled out of the sewing material. The needles of the two needle bars are involved in the sewing process. The movement of the two needle bars is alternating and synchronized with corresponding gripper bars below a Nähgutauflage.

Ausgehend von dem voranstehend dargestellten Stand der Technik ist es Aufgabe der Erfindung, eine Mehrnadelnähmaschine, insbesondere eine Vielnadelkettenstichnähmaschine derart weiterzubilden, dass die Nachteile des Standes der Technik vermieden werden und dass insbesondere die während des Nähvorgangs zu bewegenden Massen reduziert werden. Es ist ferner Aufgabe der Erfindung, ein gattungsgemäßes Verfahren derart weiterzubilden, dass die Ausbildung eines Nähmusters insbesondere durch eine Verringerung der während des Nähvorgangs zu bewegenden Massen vereinfacht wird.Based on the above-described prior art, it is an object of the invention to develop a multi-needle sewing machine, in particular a Vielnadelkettenstichnähmaschine such that the disadvantages of the prior art are avoided and in particular that to be moved during the sewing masses are reduced. It is a further object of the invention to develop a generic method such that the formation of a sewing pattern is simplified in particular by a reduction in the masses to be moved during the sewing process.

Die Lösung dieser Aufgabenstellung sieht bei einer gattungsgemäßen Mehrnadelnähmaschine vor, dass die Nadeln mittelbar oder unmittelbar mit einer sich oszillierend bewegenden Antriebswelle verbunden sind und dass zumindest eine, vorzugsweise mehrere Nadel(n) von der sich oszillierend bewegenden Antriebswelle derart stillsetzbar, insbesondere entkoppelbar ist bzw. sind, dass die Nadel(n) in einer von der sich oszillierend bewegenden Antriebswelle stillgesetzten bzw. entkoppelten Stellung während des Nähvorgangs nicht translatorisch in Richtung der Nähgutauflage bewegt ist bzw. sind und somit nicht in das Nähgut einsticht bzw. einstechen.The solution of this problem provides in a generic Mehrnadelnähmaschine that the needles directly or indirectly with a oscillating moving drive shaft are connected and that at least one, preferably a plurality of needle (s) of the oscillating moving drive shaft can be stopped, in particular decoupled or are that the needle (s) in one of the oscillating moving drive shaft stopped or decoupled Position during the sewing process is not translationally moved in the direction of the Nähgutauflage or are and thus not piercing or piercing the fabric.

Seitens des erfindungsgemäßen Verfahrens ist zur Lösung der voranstehenden Aufgabenstellung vorgesehen, dass nach Beendigung eines Stiches, vorzugsweise nach Beendigung eines Nähmusterelementes zumindest eine Nadel aus einer mit einer sich oszillierend bewegenden Antriebswelle gekoppelten in eine von der sich oszillierend bewegenden Antriebswelle entkoppelten Stellung überführt wird, so dass die von der sich oszillierend bewegenden Antriebswelle entkoppelte Nadel zumindest am darauffolgenden Stich, vorzugsweise eines darauffolgenden Nähmusterelementes nicht teilnimmt.On the part of the method according to the invention is provided for solving the above problem that after completion of a stitch, preferably after completion of a sewing pattern element at least one needle is transferred from a coupled with an oscillating moving drive shaft in a decoupled from the oscillating moving drive shaft position, so that the decoupled from the oscillating moving drive shaft needle does not participate at least on the following stitch, preferably a subsequent sewing pattern element.

Bei einer erfindungsgemäßen Mehrnadelnähmaschine ist somit vorgesehen, dassdie einzelnen Nadeln mit der sich oszillierend bewegenden Antriebswelle verbunden sind, wobei die einzelnen Nadeln von dem Antrieb entkoppelbar sind.. Demzufolge ist es bei der erfindungsgemäßen Mehrnadelnähmaschine nicht mehr notwendig, sämtliche Nadeln gemeinsam mit dem Nadelbalken oszillierend auf- und ab zu bewegen. Die Nadeln werden direkt angetrieben. Der Antrieb erfolgt beispielsweise über die angetriebene, sich oszillierend bewegende Antriebswelle und Kurbeltriebe, die die rotatorische Bewegung der sich oszillierend bewegend angetriebenen Antriebswelle in eine translatorische Bewegung der Nadeln umsetzen.In a multi-needle sewing machine according to the invention is thus provided that the individual needles are connected to the oscillating moving drive shaft, the individual needles are decoupled from the drive .. Accordingly, it is no longer necessary in the multi-needle sewing machine according to the invention, all needles together with the needle bar oscillating - and off to move. The needles are driven directly. The drive takes place, for example, via the driven, oscillatingly moving drive shaft and crank drives, which convert the rotational movement of the oscillatingly driven driven drive shaft into a translatory movement of the needles.

Nach einem weiteren Merkmal der Erfindung ist vorgesehen, dass die sich oszillierend bewegende Antriebswelle mit der Nadel über einen, insbesondere als Nocke ausgebildeten Antriebshebel mit einer Aufnahme und ein Pleuel verbindbar ist, welches Pleuel mit der Aufnahme koppel- und entkoppelbar ist. Hierbei ist vorgesehen, dass die Aufnahme an der Nocke vorgesehen ist und dass an der Nadel oder einem Nadelhalter das Pleuel mit einem in die Aufnahme einrastbaren Gegenstück ausgebildet ist. Selbstverständlich ist hier auch eine kinematische Umkehrung in dem Sinne möglich, dass die Aufnahme am Pleuel und das Gegenstück am Nocken angeordnet ist. Das Pleuel ist zumindest begrenzt schwenkbeweglich um die Nadel angeordnet, so dass das Pleuel in einer angehobenen Stellung der Nadel von der Aufnahme entkoppelbar oder mit der Aufnahme koppelbar ist. In gekoppelter Stellung verläuft das Pleuel in Längsachsenrichtung der Nadel, um eine möglichst vollständige Kraftübertragung auf die Nadel sicherzustellen.According to a further feature of the invention it is provided that the oscillating moving drive shaft with the needle via a, in particular designed as a cam drive lever with a receptacle and a connecting rod is connectable, which connecting rod with the recording is coupled and decoupled. In this case, it is provided that the receptacle is provided on the cam and that the connecting rod is formed on the needle or a needle holder with a counterpart which can be latched into the receptacle. Of course, here is also a kinematic reversal in the sense possible that the recording on the connecting rod and the counterpart is arranged on the cam. The connecting rod is at least limited pivotally arranged around the needle, so that the connecting rod in a raised position of the needle can be decoupled from the recording or coupled to the recording. In the coupled position, the connecting rod extends in the longitudinal axis direction of the needle to ensure the greatest possible power transmission to the needle.

Es ist ferner bei einer erfindungsgemäßen Mehrnadelnähmaschine vorgesehen, dass die Nadel(n) pneumatisch oder hydraulisch mit der sich oszillierend bewegenden Antriebswelle koppelbar und/oder von der Antriebswelle entkoppelbar ist bzw. sind. Durch das Koppeln und/oder Entkoppeln der Nadeln besteht somit die Möglichkeit, Hydraulik- oder Pneumatikzylinder zu verwenden, die beidseitig wirken und einzeln ansteuerbar sind. Vorzugsweise greifen die Pneumatik- oder Hydraulikzylinder am voranstehend beschriebenen Pleuel an, wobei das Pleuel mittels des Pneumatik- und/oder Hydraulikzylinders in Richtung auf die sich oszillierend bewegende Antriebswelle, vornehmlich die Aufnahme, verschiebbar und aus dieser Aufnahme herausziehbar ist.It is further provided in a multi-needle sewing machine according to the invention that the Needle (s) pneumatically or hydraulically coupled with the oscillating moving drive shaft and / or can be decoupled from the drive shaft or are. By coupling and / or decoupling of the needles is thus possible to use hydraulic or pneumatic cylinders, which act on both sides and are individually controlled. Preferably, the pneumatic or hydraulic cylinder engage the connecting rod described above, wherein the connecting rod by means of the pneumatic and / or hydraulic cylinder in the direction of the oscillating moving drive shaft, especially the receptacle, displaceable and can be pulled out of this recording.

Es ist nach einem weiteren Merkmal der Erfindung vorgesehen, dass jede Nadel in einer Halterung auswechselbar angeordnet ist, wobei die Halterung zwischen der sich oszillierend bewegenden Antriebswelle und der Nadel angeordnet ist. Bei dieser Ausgestaltung ist es insbesondere von Vorteil, dass bei einem Nadelbruch lediglich die Nadel auszuwechseln ist, wobei der gesamte Antrieb unverändert bleibt, so dass nachfolgende Einstellmaßnahmen nicht erforderlich werden.It is provided according to a further feature of the invention that each needle is arranged replaceably in a holder, wherein the holder between the oscillating moving drive shaft and the needle is arranged. In this embodiment, it is particularly advantageous that in a needle break only the needle is replaced, the entire drive remains unchanged, so that subsequent adjustment measures are not required.

Bei einer Ausführungsform der erfindungsgemäßen Mehrnadelnähmaschine sind Nadeln mit Halterungen vorgesehen, wobei eine Nadel in eine achsial ausgerichtete Bohrung der Halterung eingeschoben und mittels einer Schraube, insbesondere einer Madenschraube festgestellt ist. Die Halterung weist eine seitlich angeordneten Vorsprung auf, der in eine korrespondierende Aufnahme an einem translatorisch bewegbaren Träger befestigt ist. Derart ausgebildet ist die Halterung der Nadel über eine Bewegungsmimik derart verfahrbar, dass der Vorsprung in die entsprechende Aufnahme eingesteckt und gegebenenfalls verriegelt wird. Die Verriegelung kann hierbei rein mechanisch oder elektromagnetisch erfolgen.In one embodiment of the multi-needle sewing machine according to the invention needles are provided with holders, wherein a needle is inserted into an axially aligned bore of the holder and fixed by means of a screw, in particular a grub screw. The holder has a laterally arranged projection, which is fastened in a corresponding receptacle on a translationally movable carrier. In this manner, the holder of the needle can be moved by a movement mimic such that the projection is inserted into the corresponding receptacle and optionally locked. The locking can be done purely mechanically or electromagnetically.

Eine Alternative zu einem pneumatischen oder hydraulischen Koppeln und/oder Entkoppeln der Nadeln mit der sich oszillierend bewegenden Antriebswelle ist nach einem weiteren Merkmal dadurch gegeben, dass die Nadel(n) elektromechanisch, insbesondere über eine Zahnstange und ein elektromotorisch angetriebenes, mit der Zahnstange kämmendes Ritzel mit der sich oszillierend bewegenden Antriebswelle koppelbar und/oder von dem Antrieb entkoppelbar ist bzw. sind.An alternative to a pneumatic or hydraulic coupling and / or decoupling of the needles with the oscillating moving drive shaft is given according to a further feature in that the needle (s) electromechanical, in particular via a rack and an electric motor driven, meshing with the rack pinion can be coupled with the oscillating moving drive shaft and / or decoupled from the drive or are.

Nach einem weiteren Merkmal der Erfindung ist vorgesehen, dass die Greiferhaken von der Greiferwelle entkoppelbar sind. Hierbei hat es sich als vorteilhaft erwiesen, jeweils den Greifer von der Greiferwelle zu entkoppeln, der mit einer entsprechend entkoppelten Nadel zusammenwirkt. Es besteht natürlich auch die Möglichkeit, dass die Greiferhaken grundsätzlich auch dann angetrieben werden, wenn einzelne Nadeln nicht angetrieben sind. Hierbei entsteht aber ein Mehrverbrauch an Greiferfaden und darüber hinaus gegebenenfalls auch das Problem, dass sich überschüssiger Greiferfaden um die Greiferhaken und/oder die Greiferwelle wickelt und die Funktion der Kettenstichnähmaschine beeinträchtigt.According to a further feature of the invention it is provided that the gripper hooks can be decoupled from the gripper shaft. It has proved to be advantageous in each case to decouple the gripper from the gripper shaft, which cooperates with a correspondingly decoupled needle. Of course, there is also the possibility that the gripper hooks are basically driven even when individual needles are not driven. But this results in an additional consumption of looper thread and beyond possibly also the problem that excess looper thread wraps around the hook hook and / or the hook shaft and affects the function of the chain stitch sewing machine.

Demzufolge ist es nach einem weiteren Merkmal in vorteilhafter Weise vorgesehen, dass die Greiferhaken und die zugehörigen Nadeln entkoppelbar sind.Accordingly, it is provided according to a further feature in an advantageous manner that the gripper hooks and the associated needles can be decoupled.

Seitens des erfindungsgemäßen Verfahrens hat es sich in einer Weiterbildung als vorteilhaft erwiesen, dass der Nadelfaden mit dem Greiferfaden am Ende des fertigen oder zumindest nach Beendigung des letzten Nähmusterelementes, auf jeden Fall aber nach einem letzten Stich, vor dem Beginn des nächsten Nähmusterelements verknotet wird. Alternativ kann vorgesehen sein, dass der Nadel- und/oder Greiferfaden nach einem letzten Stich, insbesondere vor dem Beginn des nächsten Nähmusterelements geschnitten wird bzw. werden. Das Schneiden, insbesondere des Greiferfadens, erfolgt hierbei mit einer Länge, die es vermeidet, dass der Greiferfaden aus in dem Greiferhaken angeordneten Bohrungen herausgezogen wird. Gleichzeitig ist eine Länge des abzuschneidenden Greiferfadens seitens des Nähguts vorzusehen, die es vermeidet, dass sich der Kettenstich selbsttätig öffnet.On the part of the method according to the invention, it has proved to be advantageous in a development that the needle thread is knotted with the looper thread at the end of the finished sewing pattern or, at least, after the last sewing pattern element, but in any case after a last stitch, before the beginning of the next sewing pattern element. Alternatively it can be provided that the needle and / or hook thread is cut after a last stitch, in particular before the beginning of the next sewing pattern element. The cutting, in particular of the looper thread, takes place here with a length which avoids that the looper thread is pulled out of arranged in the hook hook holes. At the same time, a length of the rapier thread to be cut off is provided on the part of the sewing material, which avoids that the chain stitch opens automatically.

Es ist nach einer Weiterbildung des erfindungsgemäßen Verfahrens ferner vorgesehen, dass das Nähgut, vorzugsweise vor dem Beginn des nächsten Nähmusterelements in Nährichtung bewegt wird, um den Nadelfaden verlängernd von einem Fadenvorrat abzuziehen, bevor der Nadelfaden mit dem Greiferfaden verknotet und/oder abgeschnitten wird. Durch diese Vorgehensweise werden die voranstehend dargestellten Forderungen erfüllt.It is further provided according to a development of the method according to the invention, that the fabric, preferably before the beginning of the next Nähmusterelements is moved in the sewing direction to withdraw the needle thread extending from a thread supply, before the needle thread is knotted with the looper thread and / or cut off. By doing so, the above requirements are met.

Eine vorteilhafte Weiterbildung des erfindungsgemäßen Verfahrens sieht darüber hinaus vor, dass mehrere an zumindest einem Nadelbalken angeordnete Nadeln gleichzeitig gekoppelt oder entkoppelt werden. Durch diese Ausgestaltung können unterschiedliche Nähmuster in einfacher Weise genäht werden. Die Nadeln werden vorzugsweise hydraulisch, pneumatisch oder elektromechanisch gekoppelt oder entkoppelt.An advantageous development of the method according to the invention also provides that a plurality of needles arranged on at least one needle bar are simultaneously coupled or decoupled. By this configuration, different sewing patterns can be sewn in a simple manner. The needles are preferably hydraulically, pneumatically or electromechanically coupled or decoupled.

Ferner ist erfindungsgemäß vorgesehen, dass die Nadeln über eine programmierbare Steuerung gekoppelt oder entkoppelt werden. Schließlich sieht eine Weiterbildung der Erfindung vor, dass die programmierbare Steuerung in Analogie zu einem oder mehreren Nähmustern abläuft.Furthermore, the invention provides that the needles are coupled or decoupled via a programmable controller. Finally, a further development of the invention provides that the programmable controller runs in analogy to one or more sewing patterns.

Weitere Merkmale und Vorteile der erfindungsgemäßen Mehrnadelnähmaschine bzw. des erfindungsgemäßen Verfahren ergeben sich aus der nachfolgenden Beschreibung der zugehörigen Zeichnung. In der Zeichnung zeigen:

Figur 1
ein Maschinengestell mit zwei angetriebenen Nadeln im Querschnitt;
Figur 2
einen Abschnitt des Maschinengestells gemäß Figur 1 in Längsansicht;
Figur 3
eine der Nadeln gemäß den Figuren 1 und 2 in entkoppelter Stellung;
Figur 4
die Nadel gemäß Figur 3 in gekoppelter und angehobener Stellung und
Figur 5
die Nadeln gemäß den Figuren 3 und 4 in gekoppelter und abgesenkter Stellung.
Further features and advantages of the multi-needle sewing machine according to the invention and the method according to the invention will become apparent from the following description of the associated drawing. In the drawing show:
FIG. 1
a machine frame with two driven needles in cross section;
FIG. 2
a section of the machine frame according to FIG. 1 in longitudinal view;
FIG. 3
one of the needles according to the FIGS. 1 and 2 in decoupled position;
FIG. 4
the needle according to FIG. 3 in coupled and raised position and
FIG. 5
the needles according to the Figures 3 and 4 in coupled and lowered position.

In Figur 1 ist ein Maschinengestell 1 im Querschnitt dargestellt, das aus zwei U-förmigen Elementen 2 ausgebildet ist, welche Elemente 2 mit ihren Schenkeln fluchtend zueinander ausgerichtet sind, so dass sich ein kastenförmiges Maschinengestell 1 bildet. Oberhalb des Maschinengestells 1 verlaufen parallel zur Längsrichtung des Nadelbalkens 1 gerichtete Antriebswellen 3, die drehfest mit Nocken 4 verbunden sind, wobei die Nocken 4 und die Antriebswellen 3 einen Antrieb 5 für Nadeln 6 bilden. Die Antriebswellen 3 des Antriebs 5 bewegen sich oszillierend, wobei die oszillierende Bewegung der Antriebswellen 3 in eine translatorische Bewegung der Nadeln 6 umgesetzt wird.In FIG. 1 a machine frame 1 is shown in cross-section, which is formed from two U-shaped elements 2, which elements 2 are aligned with their legs in alignment with each other, so that a box-shaped machine frame 1 is formed. Above the machine frame 1 directed parallel to the longitudinal direction of the needle bar 1 directed drive shafts 3, which are rotatably connected to cam 4, wherein the cams 4 and the drive shafts 3 form a drive 5 for needles 6. The drive shafts 3 of the drive 5 oscillate, wherein the oscillating movement of the drive shafts 3 is converted into a translational movement of the needles 6.

Die Nadeln 6 sind in translatorisch über den Antrieb 5 bewegbaren Halterungen 7 angeordnet. Die Halterungen 7 sind an beidseitig des Maschinengestells 1 befestigten Führungselementen 8 geführt, wobei jedes Führungselement 8 zwei Schenkel 9, 10 mit jeweils einer Bohrung 11 aufweist, die koaxial fluchtend angeordnet sind und in denen ein Gleitlager 12 befestigt ist. Jede Halterung 7 weist an einem der Nadel 6 zugewandten Ende eine Bohrung auf, in die ein Steckelement 13 eingesteckt ist, welches kraft- und/oder formschlüssig in der Bohrung 11 gehalten ist. Jedes Steckelement 13 hat eine Aufnahmebohrung für die Nadel 6 und eine quer zur Aufnahmebohrung verlaufende Bohrung, in die eine Madenschraube 14 zur reibschlüssigen Verbindung mit der Nadel 6 eingeschraubt ist.The needles 6 are arranged in translational about the drive 5 movable brackets 7. The brackets 7 are guided on both sides of the machine frame 1 mounted guide elements 8, wherein each guide element 8 has two legs 9, 10, each having a bore 11 which are arranged coaxially aligned and in which a sliding bearing 12 is attached. Each holder 7 has at one of the needle 6 facing the end of a bore into which a plug-in element 13 is inserted, which is non-positively and / or positively held in the bore 11. Each plug-in element 13 has a receiving bore for the needle 6 and a bore extending transversely to the receiving bore, into which a grub screw 14 is screwed for frictional connection with the needle 6.

An dem der Bohrung zur Aufnahme des Steckelements 13 gegenüberliegenden Ende weist die Halterung 7 ein Gelenk 15 auf, welches zwei Glieder gelenkig miteinander verbindet, wobei das erste Glied 17 eine Aufnahme 18 für die Halterung 7 hat und das zweite Glied als Pleuel 16 ausgebildet ist. Vorzugsweise ist die Halterung 7 mit der Aufnahme 18 verschraubt, wobei sich beispielsweise im Bereich der Halterung 7 ein Außengewinde und im Bereich der Aufnahme 18 ein Innengewinde eignet.At the opposite end of the bore for receiving the plug-in element 13, the holder 7 has a hinge 15 which articulates two members together, wherein the first member 17 has a receptacle 18 for the holder 7 and the second member is formed as a connecting rod 16. Preferably, the holder 7 is screwed to the receptacle 18, wherein, for example, in the region of the holder 7, an external thread and in the region of the receptacle 18 is an internal thread.

Das Pleuel 16 weist an seinem freien Ende einen Zylinder 19 auf, der mit seiner Längsachse rechtwinklig zur Längsachse des Pleuels 16 verläuft. Über diesen Zylinder 19ist das Pleuel 16 mit dem Antrieb 5, nämlich der Nocke 4 verbunden.The connecting rod 16 has at its free end a cylinder 19 which extends at right angles to the longitudinal axis of the connecting rod 16 with its longitudinal axis. About this cylinder 19, the connecting rod 16 with the drive 5, namely the cam 4 is connected.

Zu diesem Zweck weist die Nocke 4 an ihrem von der Antriebswelle 3 abgewandten Ende eine halbkreisförmige Aufnahme 20 auf, deren Durchmesser mit dem Durchmesser des Zylinders 19 im Wesentlichen übereinstimmt. Unterhalb der Aufnahme 20 ist an der Nocke 4 ein Federelement 21 angeordnet, so dass der Zylinder 19 zwischen der Aufnahme 20 und dem Federelement 21 klemmend gehalten ist. Das Federelement 21 ist an seinem freien Ende von der Aufnahme 20 weg abgebogen.For this purpose, the cam 4 at its end facing away from the drive shaft 3 end a semicircular receptacle 20, whose diameter substantially coincides with the diameter of the cylinder 19. Below the receptacle 20, a spring element 21 is arranged on the cam 4, so that the cylinder 19 is clamped between the receptacle 20 and the spring element 21. The spring element 21 is bent away at its free end of the receptacle 20.

Über die Nocke 4 wird die oszillierende Bewegung der Antriebswelle 3 translatorisch auf das Pleuel 16 und somit auf die Halterung 7 und die Nadel 6 übertragen, so dass die Halterung 7 und die Nadel 6 bei mit der Nocke 4 verbundenem Pleuel 16 eine in den Bohrungen 11 des Führungselements 8 geführte Bewegung auf und ab ausführt.About the cam 4, the oscillating movement of the drive shaft 3 is translationally transmitted to the connecting rod 16 and thus to the holder 7 and the needle 6, so that the holder 7 and the needle 6 connected to the cam 4 connecting rod 16 in the holes 11th the guide member 8 performs guided movement up and down.

Der Schenkel 10 des Führungselements 8 weist eine rechtwinklig zum Schenkel 10 ausgerichtete und im Wesentlichen L-förmig ausgebildete Stütze 22 auf, die im Bereich ihres freien Endes einen Linearmotor 23, beispielsweise in Form eines Pneumatikzylinders trägt, mit dem ein Schiebeelement 24 bewegbar ist. Das Schiebeelement 24 weist eine Bewegungsrichtung rechtwinklig zur Längsachse der Halterung 7 auf, wobei das Schiebeelement 24 einen Vorsprung 25 aufweist, der den Zylinder 19 übergreift.The leg 10 of the guide element 8 has a right angle to the leg 10 aligned and substantially L-shaped support 22 which carries in the region of its free end a linear motor 23, for example in the form of a pneumatic cylinder with which a sliding element 24 is movable. The sliding element 24 has a direction of movement perpendicular to the longitudinal axis of the holder 7, wherein the sliding element 24 has a projection 25 which engages over the cylinder 19.

Ferner ist an der Stütze 22 eine hinterschnitten ausgebildete Aufnahme 26 aus einem Federstahl angeordnet. Die Aufnahme 26 ist im Wesentlichen kreisbogenabschnittförmig ausgebildet, wobei der Durchmesser der Aufnahme 26 im Wesentlichen mit dem Durchmesser des Zylinders 19 übereinstimmt.Further, an undercut receptacle 26 made of a spring steel is arranged on the support 22. The receptacle 26 is designed essentially in the shape of a circular arc section, wherein the diameter of the receptacle 26 substantially coincides with the diameter of the cylinder 19.

Mittels des Schiebeelements 24 wird das 6 Pleuel 16 zwischen einer mit dem Nocken 4 gekoppelten Stellung oberhalb des Federelements 21 und einer Stellung bewegt, in der der Zylinder 19 in die Aufnahme 26 aufgenommen ist und folglich nicht mit der Nocke 4 und damit der sich oszillierend bewegenden Antriebswelle 3 gekoppelt ist. Die Bewegung des Schiebeelements 24 wird hierbei über den Linearmotor 23 ausgeführt. Zur Begrenzung des Verschiebewegs ist ergänzend ein Anschlag 27 am freien Ende der Stütze 22 angeordnet.By means of the sliding element 24, the 6 connecting rod 16 is moved between a position coupled to the cam 4 above the spring element 21 and a position in which the cylinder 19 is received in the receptacle 26 and consequently not with the cam 4 and thus the oscillating moving Drive shaft 3 is coupled. The movement of the sliding element 24 is in this case carried out via the linear motor 23. To limit the displacement of a stop 27 is additionally arranged at the free end of the support 22.

Bei der voranstehend beschriebenen Ausführungsform weist jede Nadel 6 einer jeden Nadelreihe einen sich oszillierend bewegenden Antrieb 5 mit einer Nocke 4 und einem Pleuel 16 sowie der zugehörigen Bewegungseinrichtung auf. Alle Nocken 4 sind drehfest auf der Antriebswelle 3 angeordnet. Es besteht auch die Möglichkeit zwischen jedem Nocken 4 und der Antriebswelle 3 eine Kupplung anzuordnen, die ein Entkuppeln oder Kuppeln der einzelnen Nocken 4 und damit der einzelnen Nadeln 6 mit der Antriebswelle ermöglicht. Mit diesen Ausgestaltungen kann somit jede einzelne oder mehrere Nadeln 6 von der sich oszillierend bewegenden Antriebswelle 3 entkoppelt werden, so dass bei der Ausbildung eines Nähmusters in einem nicht näher dargestellten Nähgut die Anzahl und die Anordnung der das Nähmuster ausbildenden Nadeln 6 individuell gesteuert werden kann. Wesentlicher Vorteil dieser Ausgestaltung ist, dass nicht angetriebene Nadeln 6 während des Nähvorgangs nicht bewegt werden, so dass lediglich die Massen der angetriebenen Nadeln 6 zu berücksichtigen sind. Desweiteren ermöglicht diese Ausgestaltung die Stillsetzung des Maschinengestells 1, da der Antrieb der Nadeln 6 unmittelbar und nicht mittelbar über das Maschinengestell 1 erfolgt.In the embodiment described above, each needle 6 of each needle row has an oscillatingly moving drive 5 with a cam 4 and a connecting rod 16 and the associated movement device. All cams 4 are rotatably mounted on the drive shaft 3. There is also the possibility between each cam 4 and the drive shaft 3 to arrange a clutch that allows uncoupling or coupling of the individual cams 4 and thus the individual needles 6 with the drive shaft. With these embodiments, each individual or multiple needles 6 can thus be decoupled from the oscillatingly moving drive shaft 3, so that in the formation of a sewing pattern in a sewing material, not shown, the number and arrangement of the sewing pattern forming needles 6 can be controlled individually. A significant advantage of this embodiment is that non-driven needles 6 are not moved during the sewing process, so that only the masses of the driven needles 6 are to be considered. Furthermore, this embodiment enables the shutdown of the machine frame 1, since the drive of the needles 6 takes place directly and not indirectly via the machine frame 1.

In den Figuren 3 bis 5 ist ein Abschnitt der in den Figuren 1 und 2 dargestellten Vorrichtung in drei Betriebspositionen gezeigt. Figur 3 zeigt hierbei die entkoppelte Stellung, in der der Zylinder 19 aus der Aufnahme 20 ausgerastet ist, so dass die Nocke 4 oszillierende Bewegungen durch den Antrieb der Antriebswelle 3 ausführt, ohne dass die Nadel 6 translatorisch in Richtung einer Nähgutauflage 33 bewegt wird. Die Figur 3 zeigt darüber hinaus eine Stellung der Nocke 4, in der ein Kuppeln bzw. Entkuppeln des Zylinders 19 mit der Aufnahme 20 möglich ist. In der entkoppelten Stellung gemäß Figur 3 ist das Schiebeelement 24 in Richtung des linearen Motors 23 verschoben, so dass das Schiebeelement 24 am Anschlag 27 anliegt.In the FIGS. 3 to 5 is a section of the FIGS. 1 and 2 shown device in three operating positions shown. FIG. 3 shows here the decoupled position in which the cylinder 19 is disengaged from the receptacle 20, so that the cam 4 performs oscillating movements by the drive of the drive shaft 3 without the needle 6 is moved translationally in the direction of a Nähgutauflage 33. The FIG. 3 moreover shows a position of the cam 4, in which a coupling or decoupling of the cylinder 19 with the receptacle 20 is possible. In the decoupled position according to FIG. 3 the sliding element 24 is displaced in the direction of the linear motor 23, so that the sliding element 24 bears against the stop 27.

Die Figur 4 zeigt eine mit der Figur 3 übereinstimmende Stellung der Nocke 4 bei aus dem Linearmotor 23 ausgefahrenem Schiebeelement 24. Durch die translatorische Bewegung des Schiebeelements 24 wird das Glied 16 um das Pleuel 15 in Richtung auf die Aufnahme 20 verschwenkt und dort durch das Federelement 21 verrastet. Hierdurch wird das Glied 16 über den Zylinder 19 mit der Aufnahme 20 der Nocke 4 gekoppelt, so dass im folgenden die Nadel 6 über die Antriebswelle 3 und die Nocke 4 oszillierend derart angetrieben wird, dass die Nadel 6 translatorisch in Richtung der Nähgutauflage 33 bewegt wird. Eine diesbezügliche Position der Nadel 6, bei der die Nadel 6 eine Bohrung 34 in der Nähgutauflage durchgreift ist in Figur 5 dargestellt.The FIG. 4 shows one with the FIG. 3 coincident position of the cam 4 with extended from the linear motor 23 sliding element 24. By the translational movement of the sliding element 24, the member 16 is pivoted about the connecting rod 15 in the direction of the receptacle 20 and latched there by the spring element 21. As a result, the member 16 is coupled via the cylinder 19 with the receptacle 20 of the cam 4, so that in the following the needle 6 is driven in an oscillating manner via the drive shaft 3 and the cam 4 such that the needle 6 is moved translationally in the direction of the fabric support 33 , A related position of the needle 6, in which the needle 6 engages through a bore 34 in the Nähgutauflage is in FIG. 5 shown.

Ergänzend zeigen die Figuren 3 bis 5 eine Greiferwelle 29 einen daran angeordneten Greiferhaken 28, der auswechselbar in einer Halterung 35 angeordnet ist, die drehfest mit der Greiferwelle 29 verbunden ist. Der Greiferhaken 28 hat in einem Kniebereich ein nicht näher dargestelltes Schneidelement, welches dem Schneiden eines nicht näher dargestellten Fadens, insbesondere des Nadelfadens dient, wobei vorgesehen ist, dass das Schneiden des Fadens durch eine weitergehende Schwenkbewegung des Greiferhakens 28 ausgeführt wird. Die weitergehende Schwenkbewegung des Greiferhakens 28 ist dahingehend zu verstehen, dass bei einer üblichen Schwenkbewegung des Greiferhakens 28 der Faden nicht in Kontakt mit dem Schneidelement gelangen kann, wohingegen bei der weitergehenden Schwenkbewegung der Faden in das Schneidelement rutscht. Bezugszeichenliste 1 Maschinengestell 26 Aufnahme 2 Element 27 Anschlag 3 Antriebswelle 28 Greiferhaken 4 Nocke 29 Greiferwelle 5 Antrieb 30 Aufnahme 6 Nadel 31 Träger 7 Halterung 32 Vorsprung 8 Führungselement 33 Nähgutauflage 9 Schenkel 34 Bohrung 10 Schenkel 35 Halterung 11 Bohrung 12 Gleitlager 13 Steckelement 14 Madenschraube 15 Gelenk 16 Pleuel 17 Glied 18 Aufnahme 19 Zylinder 20 Aufnahme 21 Federelement 22 Stütze 23 Linearmotor 24 Schiebeelement 25 Vorsprung In addition, the show FIGS. 3 to 5 a gripper shaft 29 arranged thereon a hook hook 28 which is arranged interchangeable in a holder 35 which is rotatably connected to the gripper shaft 29. The gripper hook 28 has a not shown in detail in a knee region cutting element, which is used to cut a thread, not shown, in particular of the needle thread, wherein it is provided that the cutting of the thread is carried out by a further pivotal movement of the hook hook 28. The further pivotal movement of the hook hook 28 is to be understood that in a conventional pivotal movement of the hook hook 28 of the thread can not get into contact with the cutting element, whereas in the further pivotal movement of the thread slips into the cutting element. <B><u> REFERENCE LIST </ u></b> 1 machine frame 26 admission 2 element 27 attack 3 drive shaft 28 looper 4 cam 29 gripper shaft 5 drive 30 admission 6 needle 31 carrier 7 bracket 32 head Start 8th guide element 33 sewing material 9 leg 34 drilling 10 leg 35 bracket 11 drilling 12 bearings 13 plug-in element 14 grub screw 15 joint 16 pleuel 17 element 18 admission 19 cylinder 20 admission 21 spring element 22 support 23 linear motor 24 sliding element 25 head Start

Claims (16)

  1. A multiple needle sewing machine, in particular a multiple needle chain stitch sewing machine, comprising stitch forming sewing elements which at least comprise two needles as well as at least one gripper shaft with gripper hooks mounted thereon, wherein respectively one needle and one gripper hook form a sewing element pair and wherein the needles and the gripper hooks are driven such that they respectively use one needle thread and one gripper thread for producing chain stitches, in particular double chain stitches in a sewing fabric placed on a sewing fabric support, the sewing fabric being preferably of a multilayer design,
    characterized in
    that the needles (6) are indirectly or directly connected to a drive shaft (3) which moves in an oscillating manner and that at least one, preferably several needles (6) cam be moved from a position coupled to the drive shaft (3) which moves in an oscillating manner into a position decoupled from the drive shaft, such that the needle(s) (6) moved into the decoupled position is/are not moved translationally into the direction of the sewing fabric support (33) during the sewing operation and does/do thus not prick into the sewing fabric.
  2. A multiple needle sewing machine according to claim 1,
    characterized in
    that the drive shaft (3) which moves in a rotatory oscillating manner can be connected to the needle (6) by means of a drive lever, which is in particular formed as a cam (4) and has a receiver (20), and a connecting rod (16), which connecting rod (16) can be coupled with or decoupled from the receiver (20).
  3. A multiple needle sewing machine according to claim 1,
    characterized in
    that the needle(s) (6) can be pneumatically or hydraulically coupled with and/or decoupled from the drive (5) which moves in an oscillating manner.
  4. A multiple needle sewing machine according to claim 1,
    characterized in
    that each needle (6) is located in a holder (7) in a replaceable manner, wherein the holder (7) is arranged between the drive shaft (3) which moves in a rotatory oscillating manner and the needle (6).
  5. A multiple needle sewing machine according to claim 4,
    characterized in
    that the holder (7) is located in a machine frame (1) in a translationally moveable manner.
  6. A multiple needle sewing machine according to claim 1,
    characterized in
    that the needle(s) (6) can be electromechanically coupled with or decoupled from the drive shaft (3), which moves in a rotatory oscillating manner, in particular by means of a gear rack and an electromotively driven pinion which intermeshes with the gear rack.
  7. A multiple needle sewing machine according to claim 1,
    characterized in
    that the gripper hooks can be decoupled from the gripper shaft.
  8. A multiple needle sewing machine according to claim 7,
    characterized in
    that the gripper hooks and the associated needles (6) can be decoupled from each other.
  9. A method for forming a sewing pattern in a sewing fabric, in particular a sewing fabric having a multilayer design, in which at least one sewing thread and at least one gripper thread are connected to each other as a chain stitch, in particular a double chain stitch, by means of a plurality of sewing members, namely respectively a needle and a gripper,
    characterized in
    that after having completed a stitch, preferably after having completed a sewing pattern element, at least one needle is transferred from a position coupled with a drive shaft (3) which moves in a rotatory oscillating manner into a position decoupled from the drive shaft (3) which moves in a rotatory oscillating manner, such that the needle decoupled from the drive shaft (3) which moves in a rotatory oscillating manner does at least not take an active part in the following stitch, preferably a following sewing pattern element.
  10. A method according to claim 9,
    characterized in
    that the needle thread will be knotted with the gripper thread after a last stitch, in particular before starting the next sewing pattern element.
  11. A method according to claim 9,
    characterized in
    that the needle and/or gripper thread(s) will be cut after a last stitch, in particular before starting the next sewing pattern element.
  12. A method according to claim 9,
    characterized in
    that the sewing fabric is moved into the sewing direction preferably before starting the next sewing pattern element, in order to unroll the needle thread in a lengthening manner from a thread stock, before the needle thread will be knotted with and/or cut from the gripper thread.
  13. A method according to claim 9,
    characterized in
    that several needles arranged on at least one needle board are simultaneously coupled or decoupled.
  14. A method according to claim 9,
    characterized in
    that the needle(s) is/are hydraulically, pneumatically or electromechanically coupled or decoupled.
  15. A method according to claim 9,
    characterized in
    that the needle(s) is/are coupled or decoupled via a programmable controller.
  16. A method according to claim 15,
    characterized in
    that the programmable controller proceeds in analogy with one or more sewing patterns.
EP08020506.5A 2008-11-26 2008-11-26 Multiple needle sewing machine Active EP2192221B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP08020506.5A EP2192221B1 (en) 2008-11-26 2008-11-26 Multiple needle sewing machine
US12/620,183 US8250997B2 (en) 2008-11-26 2009-11-17 Multiple needle sewing machine
CN200910225898.1A CN101768841B (en) 2008-11-26 2009-11-26 Multiple needle sewing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08020506.5A EP2192221B1 (en) 2008-11-26 2008-11-26 Multiple needle sewing machine

Publications (2)

Publication Number Publication Date
EP2192221A1 EP2192221A1 (en) 2010-06-02
EP2192221B1 true EP2192221B1 (en) 2017-04-05

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EP (1) EP2192221B1 (en)
CN (1) CN101768841B (en)

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US9809912B2 (en) * 2014-10-16 2017-11-07 Handi Quilter, Inc. Vibration reduction mechanism for a sewing machine
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Also Published As

Publication number Publication date
CN101768841B (en) 2014-05-28
US20100126396A1 (en) 2010-05-27
US8250997B2 (en) 2012-08-28
CN101768841A (en) 2010-07-07
EP2192221A1 (en) 2010-06-02

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