EP2138621B1 - Sewing machine and spool device for operating such a sewing machine - Google Patents
Sewing machine and spool device for operating such a sewing machine Download PDFInfo
- Publication number
- EP2138621B1 EP2138621B1 EP20090006769 EP09006769A EP2138621B1 EP 2138621 B1 EP2138621 B1 EP 2138621B1 EP 20090006769 EP20090006769 EP 20090006769 EP 09006769 A EP09006769 A EP 09006769A EP 2138621 B1 EP2138621 B1 EP 2138621B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sewing machine
- machine according
- internal thread
- winding device
- winding
- 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.)
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- 238000009958 sewing Methods 0.000 title claims description 30
- 238000004804 winding Methods 0.000 claims description 79
- 230000007480 spreading Effects 0.000 claims description 5
- 238000003892 spreading Methods 0.000 claims description 5
- 230000000295 complement effect Effects 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 2
- 239000011796 hollow space material Substances 0.000 claims 8
- 238000013016 damping Methods 0.000 description 18
- 238000000034 method Methods 0.000 description 10
- 229920001971 elastomer Polymers 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- 239000000806 elastomer Substances 0.000 description 8
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000006263 elastomeric foam Substances 0.000 description 1
- 239000013536 elastomeric material Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012804 iterative process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B43/00—Spool-pin assemblies incorporated in sewing machines
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B59/00—Applications of bobbin-winding or -changing devices; Indicating or control devices associated therewith
Definitions
- the invention relates to a sewing machine according to the preamble of claim 1. Furthermore, the invention relates to a winding device for such a sewing machine.
- a sewing machine of the type mentioned is known by public prior use.
- a defined frictional engagement must be ensured between the coil housing of a coil to be wound up and a winder shaft of the winding device, in order to ensure that the rotating winder shaft takes along the coil housing.
- the bobbin case no longer easily plug on the winder shaft, but tends to tilt or requires an increased Aufsteckkraft.
- the GB 5714 describes a winding device with a friction wheel drive.
- the friction wheel is rotatably connected to a winder shaft, wherein on the friction wheel opposite end of the winder shaft, a coil housing can be plugged.
- the winder shaft has an inner cavity into which a central pin is inserted, which in turn provides for the rotationally fixed connection of the winder shaft with the friction wheel.
- the DE 20 2004 012 028 U1 describes a coil receptacle for a yarn stand with a hollow shaft in which a receiving pin of the Garnurers is accommodated in the manner of a needle bearing.
- a bearing receiver is formed by a threaded pin designed in the manner of a grub screw. This is screwed into an internal thread of the hollow shaft. As a result, a contact point of the bearing of the hollow shaft can be adjusted in height.
- a winder shaft with adjustable outer diameter on the other hand can reconcile the conflicting requirements of easy Aufsteckiana the bobbin on the winder shaft on the one hand and the secure frictional connection between the bobbin case and the winder shaft.
- the Au- ⁇ diameter of the winder shaft can be adjusted by means of the screw-in by spreading the winder shaft so that both conditions, ie Cosmeticsteckiana one hand and secure frictional engagement on the other hand, are met simultaneously.
- a tapered cavity according to claim 2 in particular a tapered internal thread according to claim 3, leads to a Aufsp Dahl angle when screwing the Einschraub stressess in the taper.
- An internal thread according to claim 4 represents a cost-producible variant of an internal thread with decreasing internal thread diameter is particularly favorable, the production of such internal thread with conically tapered threaded portion, when the tapered threaded portion represents the gate portion of a used for producing the internal thread tap.
- a thread according to claim 5 can be produced inexpensively.
- a blind thread according to claim 6 leads to a robust winder shaft.
- the cavity section with an enlarged diameter relative to the bag section can in particular be designed as a bore running transversely through the winder shaft.
- a grub screw according to claim 7 is inexpensive.
- a longitudinal slot according to claim 8 allows an outer diameter enlargement by spreading the winder shaft.
- a conically tapered cavity section according to claim 9 allows interaction with the screw-in without necessarily a conically tapered internal thread section must be present. This simplifies the production of the winder shaft.
- a conical taper and a non-linear taper such as a convex or concave or otherwise curved curvature of the cavity or the internal thread is possible, so that the Aufsp Son GREAT depends in a corresponding manner nonlinearly on the depth of insertion of the screw.
- a guide portion according to claim 10 allows interaction of the screw-in body with the tapered cavity, without an external thread of the screw-in body comes into contact with the tapered cavity. This protects the screw-in body.
- the guide portion may be tapered or otherwise non-linearly tapered.
- An elastomeric body according to claim 11 leads to a Aufsp Dahl Sign during compression of the elastomeric body between the screw-in and a sack end of the thread.
- the cavity can also be configured without a tapered cavity section.
- the Aufsp Gill für Struc then arises solely due to a radial force exerted by the elastomeric body on the surrounding Spulser shaft and which is brought about by a compression of the elastomer body by the screw-in.
- a sewing machine 1 has a housing 2 with an arm 3 and a stand 4.
- a needle bar 5 is driven up and down with a sewing needle 6 via an arm shaft extending in the arm 3.
- a sewing thread is fed via a thread guiding device 7 with a predetermined thread tension.
- the sewing machine 1 has a winding device 8 for winding a yarn package from a yarn roll 9.
- a concernedspulender thread 10 is thereby fed via a boom 11 and yarn guide components of the yarn guide device 7 of the winding device 8.
- FIGS. 2 and 3 show a details of the winding device 8.
- a friction wheel 12 of the winding device 8 is for driving the winding device 8 driven by the arm shaft of the sewing machine 1, as will be explained.
- the friction wheel 12 is formed by an O-ring which is mounted on a spool 13.
- the spool wheel 13 is made of plastic, such as polyurethane, and is designed as an injection molded part.
- An engaging body 14, at the free end of a hook 15 is formed in the in Fig. 2 shown instantaneous position of the winding device 8 is engaged in a receptacle 16 of the spool wheel 13, which thus represents a receiving body for the Einschreibharm 14.
- the rotational movement of the spool gear 13 with the friction wheel 12 and thus a winding movement of the winding device 8 is stopped.
- the engagement body 14 is elastically damped in the engagement position via a damping element 17 on the receiving body 13.
- the damping element 17 is made of an elastomer and is engaged via a locking foot 18 in a complementary thereto detent receiving the Spulenrades 13 and thereby positively connected thereto.
- the damping element 17 creates when braking the spool 13 via the engaged hook 15 a delay path, which is formed by a compression of the damping element 17 during braking of the spool wheel 13. This deceleration path leads to a reduction of the deceleration the winding device 8 during braking and thus to a reduced load on the end of the winding process.
- the engagement body 14 is rigidly connected to a reversing body 19, which has a switching cam with a switching edge 20. Rigid with the Ein WegMI 14 and the Umstelloasa 19 is connected to a trigger lever 21 with a coil-driver surface 22 which rests during winding on a jacket wall of the wound bobbin.
- the engagement body 14, the changeover body 19 and the release lever 21 are pivotable about a common pivot axis 23 which is parallel to a winding axis 25 of the winding device 8 predetermined by a winder shaft 24.
- a free leg of a leaf spring 26 On an outer peripheral wall of the control cam 19 is a free leg of a leaf spring 26 at. An opposite end of the leaf spring 26 is fixed via a return spring 27 to a housing-fixed support body 28 of the winding device 8.
- a coil housing 31 is placed in the coils. The coil housing 31 is attached to the winder shaft 24.
- FIG. 4 and 5 illustrate the beginning of the winding process.
- Fig. 4 shows the rotational position of the coil holder 29 with switched-off bobbin 8, ie before the beginning of the winding process.
- the réellezuspulende on the winder shaft 24 thread 10 is already cut to length with the Abr predominantlymesser 30 and clamped against the coil holder 29, so that the thread 10 at the beginning of rewinding.
- Fig. 5 shows the beginning of the winding process, in which the coil holder 29 has performed about one-fifth of a full turn clockwise.
- Fig. 6 shows details for driving the winding device 8.
- the friction wheel 12 acts for this purpose with an end wall 32 of a toothed belt wheel 33 together, which is part of a belt drive of the sewing machine 1.
- the toothed belt wheel 33 is rotatably connected to the arm shaft 34 of the sewing machine 1.
- Fig. 7 to 12 show in a momentary position sequence the drive of the winding device 8 during the winding process.
- Fig. 7 shows the switched-off winding device 8 before the start of the winding process, ie in the position which also in the Fig. 4 is shown.
- the hook 15 of the Einsch stressess 14 lies over the damping element 17 in the receptacle 16 of the spool wheel 13 in the position Fig. 7 the winding device 8 can not be rotated about the winding axis 25, as this is prevented by the engaged hook 15.
- the storage of the leaf spring 26 can be seen on a connected to the winder shaft 24 bearing body 35.
- the bearing body 35 is in turn connected to the spool wheel 13. In the off position after the Fig.
- Fig. 8 shows a switched-on position of the winding device 8.
- the winding device 8 is switched by pivoting the release lever 21 about the pivot axis 23 such that the hook 15 of the Ein Wegworkss 14th from the receptacle 16 disengages, so that the spool 13 is released from the Einschreibève 14.
- the leaf spring 26 by the switching cam of the Umstell stressess 19 in the Fig. 8 shifted to the top right, so that the leaf spring 26 via the bearing body 35, the spool 13 in the Fig. 8 displaced against the bias of the return spring 27 to the right until the friction wheel 12 comes to rest on the end wall 32 of the toothed belt wheel 33 until the winding device 8 can be driven for winding about the winding axis 25 via the arm shaft 34.
- the thread 10 is wound in the coil housing 31.
- the coil driver surface 22 of the release lever 21 is in contact with the outer jacket wall of the coil formed by the thread 10.
- the release lever 21 is characterized by the growing coiled coil so in the sequence of Fig. 8 to 9 always pivoted clockwise about the pivot axis 23. At the same time pivoting due to the rigid connection and the reversing body 19 and the Eingur stresses 14, as in the Fig. 8 ff. represented.
- Fig. 9 shows an instantaneous position at which the bobbin has practically reached its nominal strength.
- the free end of the leaf spring 26 is applied to the switching cam of the Umstell stressess 19 practically on the switching edge 20.
- Fig. 10 shows a further instantaneous position during the turn-off of the winding device 8.
- the free end of the leaf spring 26 is displaced over the switching edge 20 of the reversing body 19 away.
- the leaf spring 26 can thereby relax, so that the tensile force of the return spring 27 in relation to this opposing clamping force of the leaf spring 26 begins to get stronger.
- the leaf spring 26 presses with its free end against the reversing body 19, so that the pivoting movement of the Umstell stresses 19 and thus also the Einsch stresses 14 in the Fig. 7 to 12 continues in a clockwise direction.
- Fig. 11 shows a momentary position of the winding device 8 just before the hook 15 engages in the receptacle 16 of the spool wheel 13.
- the hook 15 is guided by a spiral guide wall 36 of the spool wheel 13. This ensures that the friction wheel 12 is still in frictional connection with the toothed belt wheel 33 until shortly before the end of the winding process.
- Fig. 12 shows the end of the turn-off, so the position of the winding device 8, which, as regards their drive, the position after Fig. 7 equivalent.
- the only difference is that in the current position after Fig. 12 on the winding device 8 a ready-wound coil in the coil housing 31 is present.
- the damping element 17 leads at the transition between the instantaneous positions after Fig. 11 and 12 This leads to a corresponding braking distance, which provides the damping element 17, reduced braking acceleration of the spool wheel 13 and thus to a correspondingly reduced load on the components of the winding device.
- Fig. 13 shows a further variant of a winding device 8.
- Components that correspond to those described above with reference to the Fig. 1 to 12 have the same reference numbers and will not be discussed again in detail.
- Fig. 14 shows in one too Fig. 7 a similar representation, an enlarged detail of the engaged in the receptacle 16 of the spool 13 hook 15 a variant of the Einsch stressess 14. Dashed lines is indicated in the Fig. 14 a limitation of a damping layer 38, which is applied to the spool wheel 13, that is on the receiving body, in the region of the receptacle 16. The damping layer 38 replaces the damping element 17.
- a corresponding damping layer 39 may also be applied to the hook 15, as in FIG Fig. 14 also indicated by dashed lines.
- the selection of the thicknesses of the damping layers 38 and 39 and the choice of material is dependent on the requirements that are placed on a reduction of the acceleration forces during braking of the spool wheel 13 of the winding device 8.
- the damping element 17 or the damping layers 38, 39 may be made of an elastomer, an elastomeric foam or rubber.
- the damping element 17 can also be used as a resilient element, for example as a leaf spring, be formed. A plastic design of such a resilient element is possible.
- the spool wheel 13 may be provided in total from a correspondingly damping or resilient material, so that the damping element is designed with the spool as a one-piece component.
- Such a one-piece design of the spool wheel 13, which also has the function of the damping element is in the Fig. 12 indicated.
- FIGS. 15 and 16 show two in the installed state of the winding device 8 horizontal longitudinal sections through the winding device 8 in the embodiment of the Fig. 1 to 13 with an expandable winder shaft.
- the winder shaft 24 is hollow with an internal cavity and has a longitudinal slot 40 extending along the winder shaft 24.
- An inner wall of the hollow winder shaft 24 is designed as an internal thread 41.
- the internal thread 41 is designed as a blind thread. At a bag portion 42 of the internal thread 41 is followed by a transverse through the winder shaft 24 bore 43 at.
- the longitudinal slot 40 extends from a free end 44 of the winder shaft 24 up to the level of the bore 43.
- the bore 43 reduces the wall thickness of the slotted winder shaft 24, so that it can be bent or spread in the slotted area.
- the bag section 42 simultaneously constitutes a threaded section of the internal thread 41, which tapers conically with respect to the bore 43.
- the internal thread diameter of the internal thread 41 thus decreases as the distance to the free end 44 of the winder shaft 24 increases.
- the winder shaft 24 has a screw-46, which is stirred as a threaded pin.
- the screw-in 46 has an external thread 47 which is complementary to the internal thread 41 in the parallel threaded portion 45, that is complementary to this internal thread section with maximum internal thread diameter is executed.
- the screw-in body 46 Toward the free end 44, the screw-in body 46 has a contoured recess 48 into which a screwing tool can engage.
- the outer diameter of the winder shaft 24 can be adapted to adapt to an inner diameter of a corresponding receptacle of the bobbin case 31 sensitively, so that the plugged onto the winder shaft 24 coil is on the one hand safely taken by the spinning bobbin winding shaft 24 on the one hand, on the other hand it is ensured that the coil housing 31 can be easily attached to the winder shaft 24.
- the outer diameter of the winder shaft 24 therefore, the frictional engagement of the bobbin case 31 with the winder shaft 24 can be adjusted. The procedure is as follows:
- the winder shaft 24 has a minimum outside diameter, in which it is ensured in each case that the coil housing 31 can be easily attached to the winder shaft 24.
- a frictional engagement between this and the plugged-coil housing 31 for safe entrainment of the bobbin case 31 is still too low.
- the conically tapering threaded portion 42 may be formed by a gate portion of a tap cutting the parallel thread portion 45. This represents a very cost-effective variant for producing the conically tapered threaded portion 42.
- FIGS. 17 and 18 show two further embodiments of an expandable winder shaft 24th
- a conically tapered cavity portion 49 is provided in the execution after Fig. 17 is in place of the conically tapered threaded portion 42.
- This taper cavity portion 49 is located between the parallel threaded portion 45 and the sac cavity portion 43.
- the screw-in body 46 has a guide section 50, which tapers in the screwed-in position of the screw-in body 46 toward the sac cavity section 43.
- the tapered cavity portion of the winder shaft 24 on the one hand and the guide portion 50 of the screw-46 on the other hand are designed without a thread.
- the guide portion 50 comes into contact with the taper cavity portion 49 as soon as the screw-in body 46 is screwed in far enough.
- the guide portion 50 cooperates with further screwing the Einschraub stressess 46 with the tapered cavity portion 49 and spreads the winder shaft 24 adjustable, so that its outer diameter corresponding to what above to execution according to the FIGS. 15 and 16 was executed, adjustable increased.
- a cylindrical elastomeric body 51 is arranged.
- the outer diameter of the elastomeric body 51 is slightly smaller than the inner diameter of the internal thread 41.
- the outer diameter of the elastomeric body 51 is greater than the tapered diameter of the tapered cavity portion 49.
- the cavity of the winder shaft 24 does not taper. Spreading of the winder shaft 24 then occurs solely by the radial force caused by a compression of the elastomer body 51 on the winder shaft 24 surrounding the elastomer body 51.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Description
Die Erfindung betrifft eine Nähmaschine nach dem Oberbegriff des Anspruchs 1. Ferner betrifft die Erfindung eine Spuleinrichtung für eine derartige Nähmaschine.The invention relates to a sewing machine according to the preamble of claim 1. Furthermore, the invention relates to a winding device for such a sewing machine.
Eine Nähmaschine der eingangs genannten Art ist durch offenkundige Vorbenutzung bekannt. Zwischen dem Spulengehäuse einer aufzuwickelnden Spule und einer Spulerwelle der Spuleinrichtung muss ein definierter Reibschluss gewährleistet sein, damit sichergestellt ist, dass die rotierende Spulerwelle das Spulengehäuse mitnimmt. Oftmals lässt sich bei einer Spuleinrichtung, bei der dieser Reibschluss gegeben ist, das Spulengehäuse nicht mehr bequem auf die Spulerwelle aufstecken, sondern neigt zum Verkanten bzw. erfordert eine erhöhte Aufsteckkraft.A sewing machine of the type mentioned is known by public prior use. A defined frictional engagement must be ensured between the coil housing of a coil to be wound up and a winder shaft of the winding device, in order to ensure that the rotating winder shaft takes along the coil housing. Often can be in a winding device in which this frictional engagement is given, the bobbin case no longer easily plug on the winder shaft, but tends to tilt or requires an increased Aufsteckkraft.
Die
Die
Es ist eine Aufgabe der vorliegenden Erfindung, eine Nähmaschine der eingangs genannten Art derart weiterzubilden, dass sich das Spulengehäuse auf die Spulerwelle der Spuleinrichtung bequem aufstecken lässt, ohne dass Abstriche bei einer sicheren reibschlüssigen Verbindung des Spulengehäuses mit der Spulerwelle gemacht werden müssen.It is an object of the present invention, a sewing machine of the type mentioned in such a way that the bobbin case can be easily attached to the winder shaft of the winding device without having to make cuts in a secure frictional connection of the bobbin with the winder shaft.
Diese Aufgabe ist erfindungsgemäß gelöst durch eine Nähmaschine mit den im Anspruch 1 angegebenen Merkmalen.This object is achieved by a sewing machine with the features specified in claim 1.
Erfindungsgemäß wurde erkannt, dass eine Spulerwelle mit einstellbarem Außendurchmesser die widerstreitenden Erfordernisse der leichten Aufsteckbarkeit des Spulengehäuses auf die Spulerwelle einerseits und der sicheren reibschlüssigen Verbindung zwischen dem Spulengehäuse und der Spulerwelle andererseits miteinander in Einklang bringen kann. Der Au-βendurchmesser der Spulerwelle kann mit Hilfe des Einschraubkörpers durch Aufspreizen der Spulerwelle so eingestellt werden, dass beide Bedingungen, also Aufsteckbarkeit einerseits und sicherer Reibschluss andererseits, gleichzeitig erfüllt sind.According to the invention it has been recognized that a winder shaft with adjustable outer diameter on the other hand can reconcile the conflicting requirements of easy Aufsteckbarkeit the bobbin on the winder shaft on the one hand and the secure frictional connection between the bobbin case and the winder shaft. The Au-β diameter of the winder shaft can be adjusted by means of the screw-in by spreading the winder shaft so that both conditions, ie Aufsteckbarkeit one hand and secure frictional engagement on the other hand, are met simultaneously.
Ein sich verjüngender Hohlraum nach Anspruch 2, insbesondere ein sich verjüngendes Innengewinde nach Anspruch 3, führt zu einer Aufspreizwirkung beim Einschrauben des Einschraubkörpers in die Verjüngung.A tapered cavity according to claim 2, in particular a tapered internal thread according to claim 3, leads to a Aufspreizwirkung when screwing the Einschraubkörpers in the taper.
Ein Innengewinde nach Anspruch 4 stellt eine kostengünstig herstellbare Variante eines Innengewindes mit sich verkleinerndem Innengewindedurchmesser dar. Besonders günstig ist die Herstellung eines solchen Innengewindes mit sich konisch verjüngendem Gewindeabschnitt dann, wenn der sich konisch verjüngende Gewindeabschnitt den Anschnittbereich eines zur Herstellung des Innengewindes herangezogenen Gewindebohrers darstellt.An internal thread according to claim 4 represents a cost-producible variant of an internal thread with decreasing internal thread diameter is particularly favorable, the production of such internal thread with conically tapered threaded portion, when the tapered threaded portion represents the gate portion of a used for producing the internal thread tap.
Entsprechend lässt sich ein Gewinde nach Anspruch 5 kostengünstig herstellen.Accordingly, a thread according to
Ein Sackgewinde nach Anspruch 6 führt zu einer robusten Spulerwelle. Der Hohlraumabschnitt mit gegenüber dem Sackabschnitt vergrößertem Durchmesser kann insbesondere als quer durch die Spulerwelle verlaufende Bohrung ausgeführt sein.A blind thread according to
Ein Gewindestift nach Anspruch 7 ist kostengünstig.A grub screw according to claim 7 is inexpensive.
Ein Längsschlitz nach Anspruch 8 ermöglicht eine Außendurchmesservergrößerung durch ein Aufspreizen der Spulerwelle. Alternativ ist es möglich, die Spulerwelle aus einem elastomeren Material auszubilden, so dass sich eine Aufspreizwirkung auch ohne einen solchen Längsschlitz ergibt.A longitudinal slot according to
Ein sich konisch verjüngender Hohlraumabschnitt nach Anspruch 9 ermöglicht ein Zusammenwirken mit dem Einschraubkörper, ohne dass zwingend ein sich konisch verjüngender Innengewindeabschnitt vorliegen muss. Dies vereinfacht die Herstellung der Spulerwelle. An Stelle einer konischen Verjüngung ist auch eine nichtlineare Verjüngung, beispielsweise eine konvexe oder konkave oder in sonstiger Weise kurvig gestaltete Verjüngung des Hohlraums oder des Innengewindes möglich, so dass die Aufspreizwirkung in entsprechender Weise nichtlinear von der Einschraubtiefe des Einschraubkörpers abhängt.A conically tapered cavity section according to
Ein Führungsabschnitt nach Anspruch 10 ermöglicht ein Zusammenwirken des Einschraubkörpers mit dem sich verjüngenden Hohlraum, ohne dass ein Außengewinde des Einschraubkörpers mit dem sich verjüngenden Hohlraum in Kontakt kommt. Dies schont den Einschraubkörper. Der Führungsabschnitt kann sich konisch oder in sonstiger Weise nichtlinear verjüngend ausgebildet sein.A guide portion according to
Ein Elastomerkörper nach Anspruch 11 führt zu einer Aufspreizwirkung beim Stauchen des Elastomerkörpers zwischen dem Einschraubkörper und einem Sackende des Gewindes. Prinzipiell kann bei einer derartigen Ausführung mit einem Elastomerkörper der Hohlraum auch ohne einen sich verjüngenden Hohlraumabschnitt ausgestaltet sein. Die Aufspreizwirkung ergibt sich dann alleine aufgrund einer Radialkraft, die der Elastomerkörper auf die ihn umgebende Spulerwelle ausübt und die durch eine Stauchung des Elastomerkörpers durch den Einschraubkörper herbeigeführt wird.An elastomeric body according to
Die Vorteile einer Spuleinrichtung nach Anspruch 12 entsprechen denen, die vorstehend unter Bezugnahme auf die Nähmaschine bereits erläutert wurden.The advantages of a winding device according to
Ausführungsbeispiele der Erfindung werden nachfolgend anhand der Zeichnung näher erläutert. In dieser zeigen:
- Fig. 1
- schematisch eine Vorderansicht einer Nähmaschine mit einer Spuleinrichtung zum Aufwickeln einer Spule von einer Garnrolle;
- Fig. 2
- perspektivisch und vergrößert die Spuleinrichtung der Nähmaschine nach
Fig. 1 ; - Fig. 3
- eine Detailansicht von Komponenten der Spuleinrichtung inklusive eines Einrückkörpers zum Stoppen einer Drehbewegung eines Spulenrades der Spuleinrichtung aus Blickrichtung III in
Fig. 2 ; - Fig. 4
- eine Aufsicht auf die Spuleinrichtung vor Beginn eines Spulvorgangs und nach dem Einklemmen eines aufzuspulenden Fadens unter einem Abreißmesser;
- Fig. 5
- in einer zu
Fig. 4 ähnlichen Darstellung die Spuleinrichtung unmittelbar nach Beginn des Spulvorgangs; - Fig. 6
- eine Aufsicht auf einen Ausschnitt der Nähmaschine nach
Fig. 1 aus Blickrichtung VI in derFig. 1 ; - Fig. 7
- einen Schnitt gemäß Linie VII-VII in
Fig. 6 , der Details zum Antrieb der Spuleinrichtung zeigt; - Fig. 8 bis 12 zu Fig. 7
- ähnliche Ansichten weiterer Momentanstellungen des Antriebs der Spuleinrichtung während des Spulvorgangs;
- Fig. 13
- in einer zu
Fig. 2 ähnlichen Darstellung eine weitere Ausführung einer Spuleinrichtung; - Fig. 14
- eine Ausschnittsvergrößerung eines Hakens eines Einrückkörpers der Spuleinrichtung, eingerückt in ein Spulenrad, in einer zu
Fig. 7 ähnlichen Darstellung zur Erläuterung weiterer Ausführungsvariante der Spuleinrichtung; - Fig. 15
- einen Längsschnitt durch die Spuleinrichtung nach den
Fig. 1 bis 13 in einer Schnittebene parallel zur Zeichenebene nachFig. 6 ; - Fig. 16
- eine Ausschnittsvergrößerung des Details XVI in
Fig. 15 ; - Fig. 17
- in einer zu
Fig. 16 ähnlichen Darstellung eine weitere Ausführung einer Spulerwelle der Spuleinrichtung; und - Fig. 18
- in einer zu
Fig. 16 ähnlichen Darstellung eine weitere Ausführung einer Spulerwelle der Spuleinrichtung.
- Fig. 1
- schematically a front view of a sewing machine with a winding device for winding a spool of a spool of thread;
- Fig. 2
- in perspective and increases the winding device of the sewing machine
Fig. 1 ; - Fig. 3
- a detailed view of components of the winding device including an engagement body for stopping a rotational movement of a spool of the winding device from the direction of view III in
Fig. 2 ; - Fig. 4
- a plan view of the winding device before the beginning of a winding operation and after clamping a aufzuspulenden thread under a tear-off;
- Fig. 5
- in one too
Fig. 4 similar illustration, the winding device immediately after the beginning of the winding process; - Fig. 6
- a top view of a section of the sewing machine after
Fig. 1 from viewing direction VI in theFig. 1 ; - Fig. 7
- a section according to line VII-VII in
Fig. 6 showing details of the drive of the winding device; - 8 to 12 to Fig. 7
- similar views of further instantaneous positions of the drive of the winding device during the winding process;
- Fig. 13
- in one too
Fig. 2 similar representation of a further embodiment of a winding device; - Fig. 14
- an enlarged detail of a hook of an engagement body of the winding device, engaged in a spool, in one to
Fig. 7 similar representation for explaining another embodiment of the winding device; - Fig. 15
- a longitudinal section through the winding device after the
Fig. 1 to 13 in a section plane parallel to the drawing planeFig. 6 ; - Fig. 16
- a detail enlargement of the detail XVI in
Fig. 15 ; - Fig. 17
- in one too
Fig. 16 a similar embodiment, a further embodiment of a winder shaft of the winding device; and - Fig. 18
- in one too
Fig. 16 a similar embodiment, a further embodiment of a winder shaft of the winding device.
Eine Nähmaschine 1 hat ein Gehäuse 2 mit einem Arm 3 und einem Ständer 4. Über eine im Arm 3 verlaufende Armwelle wird eine Nadelstange 5 mit einer Nähnadel 6 auf- und abgehend angetrieben. Ein Nähfaden wird über eine Fadenführungseinrichtung 7 mit vorgegebener Fadenspannung zugeführt.A sewing machine 1 has a housing 2 with an arm 3 and a stand 4. A
Die Nähmaschine 1 hat eine Spuleinrichtung 8 zum Aufwickeln einer Fadenspule von einer Garnrolle 9. Ein aufzuspulender Faden 10 wird dabei über einen Ausleger 11 und Fadenführungskomponenten der Fadenführungseinrichtung 7 der Spuleinrichtung 8 zugeführt.The sewing machine 1 has a winding
Ein Einrückkörper 14, an dessen freien Ende ein Haken 15 ausgebildet ist, ist in der in
Der Einrückkörper 14 liegt in der Einrückstellung über ein Dämpfungselement 17 elastisch gedämpft am Aufnahmekörper 13 an. Das Dämpfungselement 17 ist aus einem Elastomer gefertigt und ist über einen Rastfuß 18 in eine hierzu komplementäre Rastaufnahme des Spulenrades 13 eingerastet und hierdurch formschlüssig mit diesem verbunden. Das Dämpfungselement 17 schafft beim Abbremsen des Spulenrades 13 über den eingerückten Haken 15 einen Verzögerungsweg, der über eine Komprimierung des Dämpfungselementes 17 beim Bremsen des Spulenrades 13 gebildet wird. Dieser Verzögerungsweg führt zu einer Reduktion des Bremsbeschleunigung der Spuleinrichtung 8 beim Abbremsen und damit zu einer reduzierten Kräftebelastung beim Beenden des Spulvorgangs.The
Der Einrückkörper 14 ist starr mit einem Umstellkörper 19 verbunden, der einen Schaltnocken mit einer Schaltkante 20 aufweist. Starr mit dem Einrückkörper 14 und dem Umstellkörper 19 verbunden ist ein Auslösehebel 21 mit einer Spulen-Mitnehmerfläche 22, die beim Spulvorgang an einer Mantelwand der gewickelten Fadenspule anliegt. Der Einrückkörper 14, der Umstellkörper 19 und der Auslösehebel 21 sind um eine gemeinsame Schwenkachse 23 verschwenkbar, die parallel zu einer von einer Spulerwelle 24 vorgegebenen Spulachse 25 der Spuleinrichtung 8 liegt.The
An einer äußeren Umfangswand des Schaltnockens 19 liegt ein freier Schenkel einer Blattfeder 26 an. Ein gegenüberliegendes Ende der Blattfeder 26 ist über eine Rückzugsfeder 27 an einem gehäusefesten Tragkörper 28 der Spuleinrichtung 8 festgelegt.On an outer peripheral wall of the
Eine sich in Umfangsrichtung um die Spulerwelle 24 herum erstreckende Spulenaufnahme 29 liegt drehbar in dem Tragkörper 28. In einer Umfangsposition der Spulenaufnahme 29 ist ein Abreißmesser 30 zum Einklemmen des aufzuspulenden Fadens 10 angeordnet. Auf die Spulerwelle 24 ist beim Spulen ein Spulengehäuse 31 aufgesetzt. Das Spulengehäuse 31 ist auf die Spulerwelle 24 aufgesteckt.A
Nun wird der Faden 10 im Spulengehäuse 31 aufgespult. Hierbei steht die Spulen-Mitnehmerfläche 22 des Auslösehebels 21 mit der durch den Faden 10 gebildeten äußeren Mantelwand der Spule in Kontakt. Der Auslösehebel 21 wird durch die im Umfang wachsende aufgewickelte Spule also in der Sequenz der
Das Dämpfungselement 17 führt beim Übergang zwischen den Momentanpositionen nach den
Bei der Ausführung nach
Alternativ oder zusätzlich kann auch auf dem Haken 15 eine entsprechende Dämpfungsschicht 39 aufgebracht sein, wie in der
Das Dämpfungselement 17 oder die Dämpfungsschichten 38, 39 können aus einem Elastomer, einem Elastomerschaum oder aus Gummi gefertigt sein. Das Dämpfungselement 17 kann auch als federndes Element, beispielsweise als Blattfeder, ausgebildet sein. Auch eine Kunststoffgestaltung eines derartigen federnden Elements ist möglich. Schließlich kann das Spulenrad 13 insgesamt aus einem entsprechend dämpfenden bzw. federnden Material bereitgestellt sein, so dass das Dämpfungselement mit dem Spulenrad als einstückiges Bauteil ausgeführt ist. Eine derartige einstückige Ausgestaltung des Spulenrades 13, das gleichzeitig die Funktion des Dämpfungselementes hat, ist in der
Das Innengewinde 41 ist als Sackgewinde ausgeführt. An einen Sackabschnitt 42 des Innengewindes 41 schließt sich eine quer durch die Spulerwelle 24 verlaufende Bohrung 43 an. Der Längsschlitz 40 erstreckt sich von einem freien Ende 44 der Spulerwelle 24 bis auf Höhe der Bohrung 43. Die Bohrung 43 verkleinert die Wandstärke der geschlitzten Spulerwelle 24, so dass diese im geschlitzten Bereich aufgebogen bzw. aufgespreizt werden kann.The
Der Sackabschnitt 42 stellt gleichzeitig einen sich konisch zur Bohrung 43 hin verjüngenden Gewindeabschnitt des Innengewindes 41 dar. Der Innengewindedurchmesser des Innengewindes 41 verkleinert sich also mit zunehmendem Abstand zum freien Ende 44 der Spulerwelle 24.The
An den sich konisch verjüngenden Gewindeabschnitt 42 schließt sich ein paralleler Gewindeabschnitt 45 des Innengewindes 41 an, in dem sich der Innengewindedurchmesser bis zum freien Ende 44 hin nicht ändert.At the conically tapered threaded
Die Spulerwelle 24 hat einen Einschraubkörper 46, der als Gewindestift ausgerührt ist. Der Einschraubkörper 46 hat ein Außengewinde 47, das komplementär zu dem Innengewinde 41 im parallelen Gewindeabschnitt 45, also komplementär zu diesem Innengewindeabschnitt mit maximalem Innengewindedurchmesser ausgeführt ist.The
Zum freien Ende 44 hin hat der Einschraubkörper 46 eine konturierte Ausnehmung 48, in die ein Schraubwerkzeug eingreifen kann.Toward the
Mit Hilfe des Einschraubkörpers 46 kann der Außendurchmesser der Spulerwelle 24 zum Anpassen an einen Innendurchmesser einer entsprechenden Aufnahme des Spulengehäuses 31 feinfühlig angepasst werden, so dass die auf die Spulerwelle 24 aufgesteckte Spule durch die beim Spulen sich drehende Spulerwelle 24 einerseits sicher mitgenommen wird, andererseits aber sichergestellt ist, dass das Spulengehäuse 31 bequem auf die Spulerwelle 24 aufgesteckt werden kann. Über die Einstellung des Außendurchmessers der Spulerwelle 24 lässt sich also das reibschlüssige Zusammenwirken des Spulengehäuses 31 mit der Spulerwelle 24 einstellen. Hierzu wird folgendermaßen vorgegangen:With the help of the
Solange der Einschraubkörper 46 ausschließlich in dem parallelen Gewindeabschnitt 45 des Innengewindes 41 eingeschraubt ist, hat die Spulerwelle 24 einen minimalen Außendurchmesser, bei dem in jedem Fall gewährleistet ist, dass sich das Spulengehäuse 31 bequem auf die Spulerwelle 24 aufstecken lässt. In der Regel ist bei diesem minimalen Außendurchmesser der Spulerwelle 24 ein Reibschluss zwischen dieser und dem aufgesteckten Spulengehäuse 31 zur sicheren Mitnahme des Spulengehäuses 31 noch zu gering. Nun wird der Einschraubkörper 46 in einem iterativen Prozess in den sich konisch verjüngenden Gewindeabschnitt 42 eingeschraubt, wobei das Schraubwerkzeug vom freien Ende der Spulerwelle 24 her durch die hohle Spulerwelle 24 bis zur Ausnehmung 48 geführt wird.As long as the screw-in
Bei jedem Schraubvorgang des Einschraubkörpers 46 in den sich konisch verjüngenden Gewindeabschnitt 42 drückt der Einschraubkörper 46 die Wände, die die Spulerwelle 24 bilden, ein Stück weiter auseinander, so dass der Außendurchmesser der Spulerwelle 24 sich jeweils um ein Inkrement vergrößert. Hierzu verbreitert sich der Längsschlitz 40 zum freien Ende 44 der Spulerwelle 24 hin. Nach jedem inkrementalen Einschrauben des Einschraubkörpers 46 in den sich verjüngenden Gewindeabschnitt 42 wird getestet, ob der Reibschluss zwischen dem dann aufgesteckten Spulengehäuse 31 und der Spulerwelle 24 zum sicheren Mitnehmen des Spulengehäuses 31 ausreicht. Das Einschrauben des Einschraubkörpers 46 wird beendet, wenn diese Voraussetzung erfüllt ist.With each screwing of the screw-46 in the conically tapered threaded
Der sich konisch verjüngende Gewindeabschnitt 42 kann durch einen Anschnittbereich eines den parallelen Gewindeabschnitt 45 schneidenden Gewindebohrers ausgeformt sein. Dies stellt eine sehr kostengünstige Variante zur Herstellung des sich konisch verjüngenden Gewindeabschnitts 42 dar.The conically tapering threaded
Bei der Ausführung nach
Bei der Ausführung nach
Bei einer ansonsten der Ausführung nach
Claims (12)
- Sewing machine (1) comprising- a stand (4);- an arm (3) with an arm shaft (34) which is drivably connected to a needle bar (5);- a driven winding device (8) for winding a spool off a reel of yarn (9);- with the winding device (8) comprising a winding shaft (24) for attachment of a spool housing (31);characterized in that the winding shaft (24) comprises:- an inner hollow space which comprises an internal thread (41);- a spreading screw-in body (46) having an external thread which is complementary to the internal thread (41) for adjusting an external diameter of the winding shaft (24).
- Sewing machine according to claim 1, characterized in that the internal diameter of the inner hollow space of the winding shaft (24) reduces with increasing distance from the free end (44) of the winding shaft (24).
- Sewing machine according to claim 2, characterized in that the internal thread diameter of the internal thread (41) reduces with increasing distance from the free end (44) of the winding shaft (24).
- Sewing machine according to claim 3, characterized in that the internal thread (41) comprises a conically tapering threaded portion (42).
- Sewing machine according to claim 4, characterized in that the conically tapering threaded portion (42) adjoins a parallel threaded portion (45) in which the internal thread diameter does not change.
- Sewing machine according to one of claims 1 to 5, characterized in that the internal thread (41) is a blind thread, with a hollow space portion (43) of the winding shaft (24) adjoining a blind portion (42) of the internal thread (41), the hollow space portion (43) having an increased diameter in relation to the blind portion (42).
- Sewing machine according to one of claims 1 to 6, characterized in that the screw-in body (46) is formed by a threaded pin.
- Sewing machine according to one of claims 1 to 7, characterized in that the winding shaft (42) comprises at least one longitudinal slit (40).
- Sewing machine according to one of claims 2 to 8, characterized in that the inner hollow space comprises a conically tapering hollow space portion (49).
- Sewing machine according to claim 9, characterized in that the screw-in body (46) comprises a guide portion (50) which interacts with the tapering hollow space portion (49).
- Sewing machine according to one of claims 1 to 10, characterized by an elastomeric body (51) between a blind portion (42) of the hollow space portion (49) and the screw-in body (46).
- Winding device for a sewing machine according to one of claims 1 to 11.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200820008324 DE202008008324U1 (en) | 2008-06-20 | 2008-06-20 | Sewing machine and winding device for such a sewing machine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2138621A1 EP2138621A1 (en) | 2009-12-30 |
EP2138621B1 true EP2138621B1 (en) | 2012-08-15 |
Family
ID=41078067
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20090006769 Active EP2138621B1 (en) | 2008-06-20 | 2009-05-20 | Sewing machine and spool device for operating such a sewing machine |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2138621B1 (en) |
JP (1) | JP2010000348A (en) |
KR (1) | KR101532096B1 (en) |
CN (1) | CN101608383B (en) |
DE (1) | DE202008008324U1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018210997A1 (en) | 2018-07-04 | 2020-01-09 | Dürkopp Adler AG | Winding device for a sewing machine |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114059241B (en) * | 2020-11-27 | 2023-01-24 | 林泽贤 | Sewing bobbin winder |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB191001070A (en) * | 1910-01-15 | 1910-12-31 | William Kennedy | Attachment for Reels of Cotton and other Thread. |
GB191313878A (en) * | 1913-06-16 | 1913-09-04 | John Luke Walsh | Improvements connected with the Unwinding of Thread from Spools, Bobbins and the like. |
GB191505714A (en) | 1915-04-16 | 1915-07-22 | Wallace Fairweather | Sewing Machine Bobbin-winder. |
CH512621A (en) * | 1970-02-06 | 1971-09-15 | Gegauf Fritz Ag | Releasable winding device for sewing machines |
DE2501513A1 (en) * | 1975-01-16 | 1976-07-22 | Christ Jun Martin | Coupling device for head and shaft of laboratory centrifuge - has expandable connector piece engaging with hole in centrifuge head |
GB9928523D0 (en) | 1999-12-02 | 2000-02-02 | Dawe Peter J | Transaction system |
GB0001070D0 (en) | 2000-01-18 | 2000-03-08 | Whitby Graham | Method for manufacturing apertured sheet of photoresistive material |
GB0013878D0 (en) | 2000-06-07 | 2000-08-02 | Mellikof Keiran | Mobile soundproofed booth |
DE202004012028U1 (en) | 2004-07-31 | 2004-09-30 | Schlemann, Hans Dieter | Bobbin holder for industrial sewing machine includes hollow freely rotating shaft for side unwinding of yarn |
-
2008
- 2008-06-20 DE DE200820008324 patent/DE202008008324U1/en not_active Expired - Lifetime
-
2009
- 2009-05-20 EP EP20090006769 patent/EP2138621B1/en active Active
- 2009-06-04 JP JP2009134987A patent/JP2010000348A/en active Pending
- 2009-06-18 KR KR1020090054261A patent/KR101532096B1/en active IP Right Grant
- 2009-06-19 CN CN 200910150414 patent/CN101608383B/en active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018210997A1 (en) | 2018-07-04 | 2020-01-09 | Dürkopp Adler AG | Winding device for a sewing machine |
DE102018210997B4 (en) | 2018-07-04 | 2023-06-15 | Dürkopp Adler AG | Winding device for a sewing machine |
Also Published As
Publication number | Publication date |
---|---|
DE202008008324U1 (en) | 2009-11-12 |
JP2010000348A (en) | 2010-01-07 |
KR20090132524A (en) | 2009-12-30 |
CN101608383A (en) | 2009-12-23 |
EP2138621A1 (en) | 2009-12-30 |
KR101532096B1 (en) | 2015-06-26 |
CN101608383B (en) | 2013-04-10 |
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