EP2589694A1 - Bobbin holder assembly for insertion into a loop taker housing of a vertical loop taker - Google Patents

Abstract

The inner pot module has a winder case which receives a winder in a state which adapted correctly. An inner pot receives the winder case. An upper surface of a fixed knob is non-rotatably connected to the winder case, and formed on an upper position with respect to a remaining portion of the inner pot.

Description

The invention relates to a filament winding housing assembly for insertion into a gripper housing of a vertical gripper. Furthermore, the invention relates to a vertical gripper with such a filament winding housing assembly and a sewing machine with such a vertical gripper.

A filament winding housing assembly is known from the DE-PS 614 062 , A vertical gripper with one-piece filament winding housing is known from the WO 2007/101548 A1 , Other grippers in which thread winding are housed, are known from the DE-PS 607 034 , of the DE-PS 1 063 017 and the DE 39 11 134 A1 ,

It is an object of the present invention to develop a filament winding housing for a vertical gripper so that the handling of the filament winding housing assembly is improved.

This object is achieved by a filament winding housing assembly with the features specified in claim 1.

It has been recognized that, for example, problems associated with unwanted relative rotation of the filament winding in the filament winding housing can be eliminated if the filament winding is fitted snugly and as possible under interference fit into the filament winding housing. Such unwanted twisting can, if no precautions are taken against it, by a jerky acceleration of the filament winding housing, for example, mediated by a capsule fan, result. The thread winding housing assembly according to the invention has a separately from the other filament winding housing filament winding capsule for receiving the filament winding. The filament winding capsule can be made with very high diameter accuracy, so that the filament winding can be kept under a defined interference fit. As far as the filament winding capsule is secured against rotation in separately executed thread winding housing, not the entire filament winding housing must be made with appropriate dimensional accuracy, which helps reduce manufacturing costs. A vertical gripper is a gripper with a vertical axis of rotation. The filament winding can be designed as a bobbin. The filament winding capsule can be removed together with a partially used filament winding from the assembly and stored. The non-destructive removal option of the yarn package created by means of the filament winding capsule gives, in particular, the possibility of a looper thread color change without unnecessary thread waste. The filament winding housing can completely accommodate the filament winding capsule, that is over its entire axial extent. The filament winding housing, for its part, in turn can be completely accommodated in the gripper housing, ie along its entire axial extent. A ceiling-mounted or mounted on an upper side of the assembly web, which is rotatably connected to the filament winding capsule and raised relative to the other filament winding housing, gives the possibility to take the filament winding capsule for removing the filament winding capsule from the filament winding housing. Due to the cover-side web results without the need to change a handle element only in a grip position, the constant possibility to take the filament winding capsule.

A separate lid according to claim 2 provides the ability to guide a provided by the filament winding looper thread between the top wall and the lid. This makes it possible to provide a resistance during thread withdrawal by clamping the looper thread between the Cover and the top wall of the filament winding capsule. This is particularly advantageous if the thread is unwound from the thread winding in principle without resistance, since then a minimum withdrawal resistance is given for threading over the clamping. The lid may have a guide nose, which further facilitates Fadeneinfädeln.

A rigid assembly according to claim 3 is structurally simple. In particular, the web is not formed in the form of a flap.

A rotation lock according to claim 4 automatically leads to a rotation of the filament winding capsule relative to the filament winding housing. The rotation lock can be formed by an end portion of the web, which projects radially beyond the filament winding capsule and engages in a complementary at least partially recess in the filament winding housing.

A tolerance rotation angle range according to claim 5 facilitates insertion of the filament winding capsule into the filament winding housing.

A Hubsicherung according to claim 6 prevents the filament winding capsule undesirable relative to the filament winding housing in the vertical direction, ie along the gripper axis, relocated. The Hubsicherung can be designed as a bayonet lock. This is of particular advantage in conjunction with the rotation-assurance device having a tolerance angle of rotation range, since then a transfer of the bayonet-type lifting device from a release position into a securing position within the tolerance rotation angle range can be predetermined. Alternatively, the Hubsicherung may be formed by a surmountable latching device, for. B. by a resilient locking component, the filament winding housing or on the Filament winding capsule is fixed and cooperates with the Hubsicherung with a fixed counter-locking component, which is fixed to the filament winding capsule or the filament winding housing. A Hubsicherkraft the resilient locking component can be overcome to remove the filament winding capsule from the filament winding housing. The resilient latching component may be formed by at least one spring segment. The spring segment may be formed by a spring clip. The spring segment may be in a counter-locking component in the form of a circumferential recess, for. B. in the form of a circumferential groove, engage in an inner wall of the filament winding capsule or the filament winding housing. Alternatively or additionally, the Hubsicherung be formed by a magnetic fuse of the filament winding capsule in the filament winding housing.

A brake leaf spring according to claim 7 allows the specification of a defined looper thread tension. Preferably, a clamping-bearing force of the brake leaf spring on the jacket wall of the filament winding housing is adjustable, for example via an adjusting screw. A separate from the filament winding cap lid can cooperate with a top wall of the filament winding capsule for clamping holding the looper thread when threading in the preloaded brake leaf spring.

The advantages of a vertical gripper according to claim 8 and a sewing machine according to claim 9 correspond to those which have already been explained above with reference to the thread winding housing assembly according to the invention.

Fig. 1

eine teilweise innere Details freigebende Vorderansicht an einer Nähmaschine;

Fig. 2

eine Explosionsdarstellung von Komponenten einer Fadenwickelgehäuse-Baugruppe zum Einsetzen in ein Greifergehäuse eines Vertikalgreifers der Nähmaschine nach Figur 1;

Fig. 3

eine Explosionsdarstellung der Fadenwickelgehäuse-Baugruppe nach Figur 2 mit zusammengesetzter Fadenwickelkapsel zum Aufnehmen eines Fadenwickels;

Fig. 4

eine Aufsicht auf die zusammengesetzte Fadenwickelgehäuse-Baugruppe beim Einsetzen der Fadenwickelkapsel in das Fadenwickelgehäuse;

Fig. 5

einen axialen Längsschnitt durch die Fadenwickelkapsel und das Fadenwickelgehäuse gemäß Linie V-V in Figur 4, wobei ein deckenseitiger Steg, der drehfest mit der Fadenwickelkapsel verbunden ist, ungeschnitten dargestellt und die Fadenwickelkapsel noch nicht vollständig in das Fadenwickelgehäuse eingesetzt dargestellt ist;

Fig. 6

in einer zu Figur 5 ähnlichen Darstellung die Fadenwickelkapsel vollständig eingesetzt in das Fadenwickelgehäuse, wobei eine Bajonett-Hubsicherung noch in einer Freigabestellung vorliegt;

Fig. 7

in einer zu Figur 4 ähnlichen Darstellung die Fadenwickelgehäuse-Baugruppe mit relativ zum Fadenwickelgehäuse innerhalb eines Toleranz-Drehwinkelbereichs verdrehter Fadenwickelkapsel und in einer Hubsicherungsstellung vorliegender Bajonett-Hubsicherung;

Fig. 8

in einer zu den Figuren 5 und 6 ähnlichen Schnittdarstellung gemäß Linie VIII-VIII in Figur 7 die Fadenwickelgehäuse-Baugruppe in der Relativstellung nach Figur 7;

Fig. 9

perspektivisch die zusammengesetzte Fadenwickelgehäuse-Baugruppe inklusive einer Brems-Blattfeder, wobei eine Fadenführung des eingefädelten Greiferfadens veranschaulicht ist;

Fig. 10

in einer zu Figur 3 ähnlichen Darstellung eine weitere Ausführung einer Fadenwickelgehäuse-Baugruppe;

Fig. 11

eine Seitenansicht der Fadenwickel-Baugruppe nach Figur 10;

Fig. 12

einen Schnitt gemäß Linie XII-XII in Figur 11;

Fig. 13

vergrößert einen Schnitt gemäß Linie XIII-XIII in Figur 12.

Embodiments of the invention will be explained in more detail with reference to the drawing. In this show:

Fig. 1

a partial interior detail releasing front view on a sewing machine;

Fig. 2

an exploded view of components of a filament winding housing assembly for insertion into a gripper housing of a vertical gripper of the sewing machine according to FIG. 1 ;

Fig. 3

an exploded view of the filament winding housing assembly after FIG. 2 with composite filament winding capsule for receiving a filament winding;

Fig. 4

a plan view of the composite filament winding housing assembly during insertion of the filament winding capsule in the filament winding housing;

Fig. 5

an axial longitudinal section through the filament winding capsule and the filament winding housing according to line VV in FIG. 4 wherein a cover-side web which is rotatably connected to the filament winding capsule, uncut shown and the filament winding capsule is not yet shown fully inserted into the filament winding housing;

Fig. 6

in one too FIG. 5 similar representation of the filament winding capsule completely inserted into the filament winding housing, wherein a bayonet-Hubsicherung is still in a release position;

Fig. 7

in one too FIG. 4 similar representation of the filament winding housing assembly with relative to the filament winding housing within a tolerance rotation angle range twisted filament winding capsule and in a Hubsicherungsstellung present bayonet Hubsicherung;

Fig. 8

in one of the FIGS. 5 and 6 similar sectional view according to line VIII-VIII in FIG. 7 the thread winding housing assembly in the relative position to FIG. 7 ;

Fig. 9

in perspective, the composite filament winding housing assembly including a brake leaf spring, wherein a thread guide of the threaded looper thread is illustrated;

Fig. 10

in one too FIG. 3 similar representation of another embodiment of a filament winding housing assembly;

Fig. 11

a side view of the filament winding assembly after FIG. 10 ;

Fig. 12

a section according to line XII-XII in FIG. 11 ;

Fig. 13

enlarges a section according to line XIII-XIII in FIG. 12 ,

A sewing machine 1 has a base plate 2 with a stand 3 extending upwardly therefrom and an angled arm 4. The latter ends in a head 5. In the arm 4, an arm shaft 6 is rotatably mounted, which drives a crank mechanism 7 with a thread lever 8 in the head 5. The crank drive 7 is drivingly connected to a displaceably mounted in the head 5 needle bar 9 in conjunction. The latter has a sewing needle 10 at its lower end. The sewing needle 10 can be moved up and down by the crank mechanism 7. In this case, the sewing needle 10 passes through a movement space. The sewing needle 10 leads in an eye of a coil 12 via a thread tensioning device and the thread lever 8 supplied needle thread 13th

On the base plate 2, a support plate 16 is mounted, on which a workpiece 17 rests. The support plate 16 has a feed gate opening, which is designed for the passage of a feed dog 19. The feed dog 19 has a tap hole 20 for the passage of the sewing needle 10. The feed dog 19 is driven by a arranged below the base plate 2 thrust and lifting gear.

Below the support plate 16, a gripper 21 is arranged, which has a gripper housing 22 with a shell-side hook tip 23. The gripper 21 is a vertical gripper, thus has a vertical axis of rotation 24 which is perpendicular to a support plane of the support plate 16.

The gripper housing 22 is fixedly connected to a shaft which extends co-axially to the axis of rotation 24. This shaft is rotatably mounted in a bearing block 25 screwed to the base plate 2. In this, a drive shaft 26 is also mounted, which is connected to a arranged in the interior of the bearing block 25 gear transmission. The drive shaft 26 is drivingly connected to the arm shaft 6 via a belt drive 27.

Part of the gripper 21 is a thread winding housing assembly 28, which in the FIG. 2 is shown in an exploded view. The FIGS. 2 to 9 show a first embodiment of the filament winding housing assembly 28. The filament winding housing assembly 28 is used in total in the gripper housing 22, which in the Figures 2 ff. is not shown.

The filament winding housing assembly 28 has a filament winding capsule 29 for receiving a filament winding 30, also referred to as a bobbin. The filament winding capsule 29 is received by a filament winding housing 31 of the filament winding housing assembly 28. The filament winding capsule 29 on the one hand and the filament winding housing on the other hand are two separate components of the filament winding housing assembly 28th

The filament winding capsule 29 is open on the bottom side. The filament winding 30 is seated under interference fit in the filament winding capsule 29.

The filament winding housing assembly 28 further has a separate from the filament winding cap 29 cover 32 which rests on a top wall 33 of the filament winding capsule 29. As a ceiling, in each case an upper wall termination of each component described is called. Correspondingly, the bottom is a lower wall termination of the component described in each case.

The FIG. 2 shows a part of a guide of a rapier thread 34, which is withdrawn from the filament winding 30. The looper thread 34 first passes through a central passage opening 35 in the top wall 33 of the filament winding capsule 29, with which a central passage region 36 of a recess 37 formed in the lid 32 from the edge is aligned. On the edge side, the recess 37 has a bent-over thread guide nose 38.

Rotationally fixed to the filament winding capsule 29, a cover-side web 39 is connected, which is designed to be sublime relative to the other filament winding housing 29. The web 39 is placed on the lid 32 and secured thereto by bolts 40, the aligned passage openings in the lid 32 on the one hand and in the top wall 33 of the filament winding capsule 29 pass. The ceiling wall 33 on the one hand and the lid 32 on the other hand continue to have aligned sight openings 41, 42, via which a visual supply control of the thread winding 30 is possible.

The web 39 and thus also the lid 32 and the filament winding capsule 29 is secured against rotation with respect to the filament winding housing 31 via a rotation lock. To this rotation assurance includes one on the filament winding capsule 29 and the lid 32 at the edge protruding end portion 43 of the web 39, which engages in an edge-side recess 44 in an upper edge portion of the filament winding housing 31. The recess 44 has in the circumferential direction about the axis of rotation 24 a greater extent than the end portion 43, so that a relative rotation of the filament winding capsule 29 relative to the filament winding housing 31 by a tolerance rotational angle range is possible.

The filament winding capsule 29 is secured relative to the filament winding housing 31 against undesired vertical relative displacement, ie against undesired displacement along the axis of rotation 24, by means of a lifting device. The latter is designed as a bayonet lock. For this purpose, the filament winding capsule 29 has an L-shaped bayonet recess 45 (FIG. Fig. 5, 6 ), which is executed from below in a lateral wall 46 of the filament winding capsule 29. For bayonet-Hubsicherung further includes a bayonet guide body 47 ( Fig. 5, 6 ) in the form of a bolt, which is driven into a receiving opening 48 in a jacket wall 49 of the filament winding housing 31.

The FIGS. 4 to 6 show the situation when inserting the filament winding capsule 29 into the filament winding housing 31. Here, the filament winding capsule 29 is positioned relative to the filament winding housing 31 in a rotational position, which is within the tolerance rotational angle range of the rotation lock 43, 44 and in which an insertion of the bayonet guide body 47 in the bayonet recess 45 is possible. FIG. 5 shows the situation during the insertion of the bayonet guide body 47 in the bayonet recess 45 and FIG. 6 the situation in which the bayonet guide body 47 has reached a bottom of the bayonet recess 45 in the same peripheral relative position of the filament winding capsule 29 to the filament winding housing 31.

The FIGS. 7 and 8 show a securing position of the bayonet-Hubsicherung 45, 47, which after a rotation of the filament winding capsule 29 relative to the filament winding housing 31 in a clockwise direction (see directional arrow 50 in the FIG. 7 ) is reached. In this securing position, the bayonet guide body 47 has reached one end of the bayonet recess 45 (cf. FIG. 8 ). In this securing position, a relative displacement of the filament winding capsule 29 to the filament winding housing 31 along the gripper axis of rotation 24 is not possible.

The securing position is within the tolerance rotation angle range of the rotation lock 43, 44th

FIG. 9 shows a guide of the looper thread 34 when inserted into the filament winding housing 31 Fadenwickelkapsel 29. The looper thread 34 extends a distance between the lid 32 and the top wall 33 of the filament winding capsule 29 whereby a first, low guide resistance of the looper thread guide is given. The threading of the rapier thread 34 between the lid 32 and the top wall 33 of the filament winding capsule 29 is facilitated by the thread guide nose 38. The lid 22 is resilient, so that the looper thread 34 when threading in a Brake leaf spring 51 by finger pressure, as in the FIG. 9 shown, between the ceiling wall 33 and the lid 32 can be clamped. Threading the loosely coming from the thread winding 30 looper thread 34 in the preloaded brake leaf spring 51 would be at most difficult possible without such a clamping.

Subsequently, the looper thread 34 is guided to the outside of the thread winding housing jacket wall 49 and thereby passes through a clamping region of the brake leaf spring 51, which rests externally on the wound winding housing jacket wall 49. The looper thread 34 is thus guided between the brake leaf spring 51 and the thread winding housing jacket wall 49. A guide resistance of the guide of the rapier thread 34, which depends on the clamping force of the brake leaf spring 51 on the thread winding housing jacket wall 49, can be specified via a set screw 52.

After the clamping area by the brake leaf spring 51, the looper thread 34 passes through a guide groove 53 in a cover-side collar portion 54 of the filament winding housing 31 and is free from, for example, by a user, as in the FIG. 9 indicated schematically.

The guide groove 53 on the one hand and a Gegenführungsnut 55 in the end portion 43 of the web 39 on the other hand form a guide opening for the looper thread 34 in alignment with each other, for example, in the supervision FIG. 7 is visible.

Based on FIGS. 10 to 13 In the following, another embodiment of a filament winding housing assembly 56 will be described. Components corresponding to those described above with reference to the filament winding housing assembly 28 after the FIGS. 2 to 9 have already been described, bear the same reference numbers and will not be discussed again in detail.

Instead of the bayonet-Hubsicherung the execution after the FIGS. 2 to 9 the filament winding housing assembly 56 has a snap-stroke safety device by a catchable latching device. This locking-Hubsicherung is formed by a resilient latching component in the form of spring segments. In the execution of the FIGS. 10 to 13 These spring segments are designed as spring clips 57, 58. The ends of the spring clips 57, 58 are each held in radially extending through holes 59 in an outer circumferential collar 60 of the filament winding housing 31 of the filament winding housing assembly 56. Central portions 61 of the spring clip 57, 58 between the two end portions extend in regions in an inner circumferential groove 62 in the thread winding housing shell wall 49. In relaxed spring clips 57, 58 are the central portions 61 in regions over these circumferential grooves 62 on. When inserted filament winding capsule 29 in the filament winding housing 31 of the filament winding housing assembly 56 engage these protruding portions of the central portions 61 of the spring clip 57, 58 in an outer circumferential groove 63 in the filament winding shell wall 46 a. A bottom-side profile portion 64 of this outer circumferential groove 63 is chamfered, as the sectional view to FIG. 13 clarified. This chamfer ensures that a Hubsicherungskraft the spring clip 57, 58 for removing the filament winding capsule 29 from the filament winding housing 31 can be overcome.

The spring clips 57, 58 constitute a latching component of the snap-in safety device, which is fixed to the filament winding housing 31 of the filament winding housing assembly 56. The outer circumferential groove 63 constitutes a counter-latching component the locking-Hubsicherung, which is fixed to the filament winding capsule 29.

The locking-Hubsicherung prevents unwanted stroke displacement of the filament winding capsule 29 relative to the filament winding housing 31 along the axis of rotation 24th

The gripper 21 with the gripper tip 23 rotates clockwise during sewing operation of the sewing machine 1 as seen from above, while the filament winding housing 31 is held non-rotatably by the engagement of a retaining finger 65 formed therein in a groove formed on the underside of the platen 16. In this case, the hook tip 23 detects the needle thread 13 in the area below the stitch hole 20 and takes there during about half a turn around the filament winding housing 31 a loop of the needle thread 13.

After about half a revolution, the hook tip 23 releases the received needle thread loop.

With the progressive rotation of the arm shaft 6, the retraction of the released needle thread loop by the action of the now upwardly moving thread lever 8. The free end of hanging out of the filament winding housing 31 portion of the hook thread 34 is detected and through the stitch hole 20 to form a knot in pulled up the fabric 17.

As an alternative or additional Hubsicherung the filament winding capsule 29 relative to the filament winding housing 31, a magnetic security provided be, in which the thread winding capsule 29 is held by a magnetic force in the filament winding housing 31.

Claims (9)

Filament winding housing assembly (28; 56) for insertion into a gripper housing (22) of a vertical gripper (21) - with a filament winding capsule (29) for accurately fitting a filament winding (30) - With one as the thread winding capsule (29) separate component running thread winding housing (31) for receiving the filament winding capsule (29). - With a rotatably connected to the filament winding capsule (29) connected to the ceiling-side web (39) which is raised relative to the other filament winding housing (31). Filament winding housing assembly according to claim 1, characterized by one of the filament winding capsule (29) separate cover (32) which rests on a top wall (33) of the filament winding capsule (29). Filament winding housing assembly according to claim 1 or 2, characterized in that the web (39) is mounted in total rigidly on the filament winding capsule (29). Filament winding housing assembly according to one of claims 1 to 3, characterized in that the web (39) against rotation of the filament winding housing (31) via a rotation lock (43, 44) is secured against rotation. Filament winding housing assembly according to claim 4, characterized in that the rotation lock (43, 44) is designed such that a relative rotation of the filament winding capsule (29) relative to the filament winding housing (31) by a tolerance rotation angle range is possible. Filament winding housing assembly according to one of claims 1 to 5, characterized in that the filament winding capsule (29) opposite the filament winding housing (31) against undesired vertical relative displacement by a Hubsicherung (45, 47, 57, 58, 63) is secured. Filament winding housing assembly according to one of claims 1 to 6, characterized by a brake leaf spring (51) on the outside on a jacket wall (49) of the filament winding housing (31) for clamping guidance of a through the filament winding (30) provided rapier thread (34) between the brake leaf spring (51) and the thread winding housing jacket wall (49) rests. Vertical gripper with a thread winding housing assembly according to one of claims 1 to 7 and with a gripper housing (22). Sewing machine with a vertical gripper (21) according to claim 8.

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