CH705892A2 - Embroidery machine Soutache wheels. - Google Patents

Abstract

Embroidery machine with a arranged in front of the stitching plane plurality of rotatably oscillating driven soutache wheels (6), each of which has a recess (9) for the passage of the embroidery needle and at least one further eccentrically arranged recess door the passage of a soutache thread (10) in that at the front of the soutache wheel at least one guide element (18) is arranged, which surrounds the recess for the passage of the soutache thread at least partially and an extended guide for the soutache thread in the direction of its yarn path before passing through the Forming recess in the soutache wheel.

Description

The invention relates to an embroidery machine with soutache wheel and guide elements according to the preamble of patent claim 1.

An embroidery machine with soutache wheels, for example, in the subject of CH 563 486 A5 become known. The disclosure of this document is intended to be fully encompassed by the disclosure of the present invention. In the cited document, the technique of processing ornamental threads using Soutache wheels is shown.

In this embroidery machine, a plurality of rotatably mounted, oscillating driven soutache wheels is arranged in front of the stitching plane. Each Soutache wheel has a first recess for the passage of the embroidery needle and a separate, second eccentric to the axis of rotation arranged recess for the passage of the Soutache thread. The rotation of the soutache wheels is controlled by the program of the embroidery machine.

The soutache threads (for example, in the form of ornamental threads) are fed through the second recess in the soutache wheel to the fabric plane of the stitching machines and placed there. The embroidery needle with the front thread is fed through the first recess of the soutache wheel so that the front thread engages over the soutache thread laid on the fabric level and z. B. by means of a zigzag stitch due to the sliding guide of the fabric frame overlaps, pushes through the fabric and is determined by the back thread. In this way, the soutache thread is fixed by fixing with the embroidery threads on the fabric surface.

However, the invention is not limited to the determination of decorative threads on the fabric surface of an embroidery machine, but it can be set all known threads or thread-like structures, such as. As well as technical threads, where it does not matter that they are threads. It can therefore also non-circular, angular or flat, d. H. band-shaped structures on the surface of the fabric plane of an embroidery machine can be determined by the so-called soutache technique. For this reason, in the following description instead of the narrower term "ornamental thread" the broader term "soutache thread" is used, because the latter term also includes technical threads and thread structures such as braids, strands or wires and band-shaped structures.

Said CH 563486 A 5 discloses a plurality of Soutache wheels, each of which carries an external toothing and which are driven in a oscillating about an axis of rotation movement that meshes on the outer toothing a rack, which is driven to oscillate longitudinally displaceable.

In Soutache wheel remote from the axis of rotation and eccentrically arranged recess for the passage of the Soutache thread is provided by the Soutache wheel. The embroidery needle is guided through the middle recess of the soutache wheel with its front thread. The front thread is trapped beyond the fabric plane in a manner known per se using a guided in a shuttle back thread and set. The soutache thread is accordingly secured by the two embroidery threads on the fabric plane.

In the technique shown in CH 563486 A 5, however, has the disadvantage that the soutache thread can not be tightly passed through the eccentrically arranged in the soutache guide hole or recess. There is a risk that it sags in the form of a loop or a stomach and this undesirably enters the range of motion of the embroidery needle.

This is a case of error to be avoided in any case, because in this case, the embroidery needle with the attached front thread pierces through the bulbous sagging soutache thread through and secured him in a faulty manner on the soutache wheel or in the recess. In this case of error, the embroidery needle with its front thread can no longer pierce through the associated recess in the soutache wheel and is blocked.

Thus, the soutache wheel is blocked itself and the embroidery machine must be stopped to cut the so erroneously set soutache thread again free and start a new embroidery process.

Such errors occur especially when it is - with respect to the basis weight - heavy soutache threads, especially when it comes to technical thread or yarn-like structures, or even bands, where a slack and a Abdominal formation in front of the recess in the soutache wheel is often unavoidable.

The invention is therefore the object of developing an embroidery machine with soutache wheels so that the error described above, namely the unwanted fixing of the soutache thread is avoided by the front thread of the embroidery needle.

For the next object, the invention is characterized by the technical teaching of claim 1.

Feature of the invention, at least one guide element is arranged on the front of the soutache wheel, which surrounds the recess for the passage of the soutache thread at least partially and an extended guide for the soutache thread in the direction of its yarn path before Passage through the recess in the soutache wheel forms.

At the front of the Soutache wheel a guide member is accordingly arranged in the direction of the embroidery needle, which supports the Soutache thread in the direction of its yarn path before passing through the recess in the Soutache wheel and engages under the guide element fixed or detachable is located on the soutache wheel and directed in the free space in front of the soutache wheel in the direction of the maximum distance of the needle tip from the soutache wheel.

The invention is therefore the attachment of a guide element to support the soutache thread, which is fixed or detachable on the soutache wheel and as close as possible to the recess for the guidance of the soutache thread through the soutache wheel. The guide element supports and supports the soutache thread at a certain support length before it passes into the recess of the soutache wheel and is guided there in a sliding manner.

Characterized the risk of unwanted belly formation and a weight-related sagging of the soutache thread before the recess of the soutache wheel are greatly reduced.

The soutache thread can no longer sag prior to entering the recess of the Soutache wheel, because he supports in this area of the inventive guide element, and is under-handles worn.

The support length for the guide element and thus projecting into the free space in front of the soutache wheel length of the guide element is chosen so that the still arranged in the movement space of the embroidery thread before the soutache wheel thread cutting elements are not affected in their movement and collide with the guide element.

For this reason, the leadership or support length of the guide element is chosen so long that there is still room for the moving in this space to move yarn cutting elements without these collide with the guide element.

The invention is not limited to the arrangement of a single guide element. It can be provided that a plurality of recesses are provided in the soutache wheel for the optional passage of a soutache thread, wherein one can optionally pass the soutache thread through the one or through the other recess.

It is essential that each recess in the soutache wheel is associated with a guide element according to the invention, which supports and carries the soutache thread before entering the recess, and so an undesirable belly formation (sagging of the soutache thread into the area of Recess for the stitch thread in the soutache wheel) prevented.

The design of the guide element can be varied. In the first embodiment, the guide element is designed as a simple flat and approximately plate-shaped wall element, which is arranged detachably (for example attachable or latchable) on the soutache wheel.

In another embodiment, it is provided that such guide elements are also firmly connected to the soutache wheel and form a material integral part with the material of the soutache wheel.

In a preferred embodiment of the present invention, the guide element is designed as a wall element, which preferably extends with its vertical axis approximately parallel to the longitudinal axis of the embroidery needle.

However, the invention is not limited thereto. In another embodiment, it can be provided that the longitudinal axis of the arranged on the soutache wheel guide element forms an angle to the longitudinal axis of the embroidery needle, so as to support the soutache thread even further and to avoid an even stronger abdominal.

Likewise, various forms of the guide element can be provided, wherein the guide element has one or more offsets or conical in the direction of the longitudinal axis (at an angle to the longitudinal axis) of the embroidery needle is formed.

Likewise, it is provided in a development of the invention that the guide element is designed as a cylindrical, oval or rectangular tube or sleeve. The said parts are thus circumferentially closed, while in the other embodiments semi-open (ie non-circumferentially closed) support or guide or support elements are provided.

In a further embodiment it is provided that the guide element is not formed plate-shaped or wall-shaped, but that its outer edges are formed by a wire element. The previous plate or wall-shaped guide element is replaced in this embodiment by a wire element which simulates the peripheral edges of the previous plate or wall-shaped element. Due to the design of the guide element as a wire element a weight saving compared to the previous, full-surface guide elements is given.

Incidentally, the invention is not limited to a single recess in the soutache wheel for guiding the soutache thread in the form of a bore. Instead of a bore and slot-shaped recesses can be provided, which means that the soutache thread could also be designed as a band. The shape of the recess is thus matched to the cross section of the soutache thread, which is to slide with movement play through the recess. The soutache thread can thus have any desired profile shape and the shape of the recess and the guide element arranged on the recess are adapted to this profile shape.

The subject of the present invention results not only from the subject matter of the individual claims, but also from the combination of the individual claims with each other.

All in the documents, including the summary disclosed disclosures and features, in particular the spatial design shown in the drawings, are claimed as essential to the invention, as far as they are new individually or in combination over the prior art.

In the following the invention will be explained in more detail with reference to several execution paths representing drawings. Here are from the drawings and their description further features essential to the invention and advantages of the invention.

[0034] In the drawings: <Tb> FIG. 1: <sep> section through the front side of an embroidery machine in the area of an embroidery point with representation of an undesired position of the soutache thread (prior art) <Tb> FIG. 2: <sep> The modified embodiment with respect to FIG. 1 using the guide element according to the invention with the same sectional representation and the same reference numerals as FIG. 1. <Tb> FIG. 3: <sep> An embodiment of the soutache thread modified from FIG. 2. <Tb> FIG. 4-FIG. 6: <sep> Various sectional views of embodiments of guide elements. <Tb> FIG. 7: <sep> Perspective view of another embodiment of a guide element in tube form. <Tb> FIG. 8: <sep> The perspective view of a guide element as a guide wall. <Tb> FIG. 9: <sep> The perspective view with a further embodiment of a guide element. <Tb> FIG. 10: <sep> The perspective view of supporting the soutache thread in stitch formation using the embroidery needle. <Tb> FIG. 11: <sep> Perspective front view on several embroidery machine embroidery positions showing the base plate and different soutache wheels and guide elements attached thereto. <Tb> FIG. 12: <sep> Perspective view of another embodiment of a soutache wheel with wire-shaped guide elements.

For the prior art representation of Fig. 1 reference numerals are used, which are also used in the later drawings. Therefore, all in the Fig. 1 mentioned reference numerals and parts are also part of the invention.

1, an embroidery point is formed by an embroidery needle 3, which consists essentially of a needle eye 5 and a tip 4, wherein the embroidery needle 3 is fed in the direction of arrow 12 to the fabric 1, which is arranged vertically in the stitching plane 2 is.

In the illustrated position, the tip 4 of the embroidery needle 3 has reached its maximum retracted position, so that in this position there is a distance 17 to the stitching plane 2, which is maximum.

In the technique described in CH 563 486 A5, a soutache wheel 6 is arranged in front of the stitching plane 2, which is rotatably mounted in the base plate 27 according to FIG. 11 about the axis of rotation 8 and which via a rack drive not shown in detail (see FIG. 11) is offset in oscillating rotational movements. As an exemplary embodiment, it is shown that the soutache wheel has a toothing 7 arranged on the outer circumference, in which the toothed rack 26 according to FIG. 11 engages there meshes and drives it in an oscillating manner.

Of course, the invention is not limited to the outer rack drive. It can also internal rack drives are used with internal teeth for the oscillating drive of Soutache wheels 6. Similarly, cables or toothed belts or perforated steel belts can be used for the oscillating drive.

The soutache thread 10 is fed in the direction of arrow 11. It is important in the embodiment shown that the soutache thread 10 is fed under undesired formation of a stomach 13 by a recess 9 arranged eccentrically in the soutache wheel 6 in the direction of the fabric 1 and should be fixed there by means of the front thread 25 according to FIG ,

The Soutache wheel 6 should be arranged as close as possible in front of the stitching plane 2. A typical distance 16 according to the invention is preferably 3.5 mm.

Further, the prior art and the invention show that the resulting between the front of the Soutache wheel 6 and the maximum retracted position of the embroidery needle 3 distance 15 is relatively large, so that in this way the unwanted belly formation of the Soutache thread 10 is done ,

The embroidery needle 3 occurs in the invention by the way by a larger recess 14 formed by the soutache wheel, wherein the size of this recess is made relatively large only for weight saving reasons. It would also be sufficient a simple bore, as shown in the CH 563 463 A5.

The invention is based on the finding that the distance 15 (that is, the unprotected sag length of the soutache thread 10) should be shortened in order to avoid the belly 13.

Here is the invention of Fig. 2ein, the present invention using the same parts as in Figure 1 and the same description now in addition to the front of the Soutache wheel 6 next to the recess 9 for the implementation of the Soutache thread 10 in the soutache Wheel 6, a guide member 18 is used, which is formed in the embodiment shown as a guide wall.

Thus, the soutache thread 10 is decisively shortened in the direction of its free sag length and the belly 13 is shortened in an only slightly sagging thread guide 13, wherein at the same time the previously given distance 15 has been transferred to the now greatly shortened distance 15.

This means that the soutache thread 10 is supported and supported to a considerable degree in the recess 9 on the soutache wheel 10 and in this case experiences only a very short sag length 15, so that the undesired belly formation is avoided.

In the illustrated embodiment, the guide member 18 is formed as a wall element which is adapted as possible to the shape of the recess 9 and at least the lower edge of the recess 9 in the direction of the free space in front of the Soutache wheel in the direction of the longitudinal axis of the embroidery needle. 3 extended to allow effective support of the soutache thread 10.

FIG. 3 shows, as a further exemplary embodiment, that according to FIG. 2, it is not necessary for the solution to direct the vertical axis of the guide element 18 according to FIG. 2 exactly parallel to the longitudinal axis of the embroidery needle 3.

3 shows, however, that it is also possible to direct the vertical axis of a guide element 18a obliquely upwards in order to achieve even better support of the soutache thread to avoid belly formation.

Figs. 4-6 show further embodiments of such guide elements 18b, 18c, 18d.

In Fig. 4 it is shown that the guide member 18 b may have a front-side bend 19, while in Fig. 5dargestellt is that the end 20 of the guide member 18 c is rounded to avoid damage to the soutache thread 10 and in Incidentally, the entire guide member 18c is directed obliquely upward.

In Fig. 6 it is shown that in a modification to the representations of FIG. 5, an obliquely upwardly directed element may be provided with a front bend 21. From this, the guide element 18d is formed.

In Fig. 7-9 various other embodiments of such guide elements are shown. It can be seen that in the exemplary embodiment according to FIG. 7, the guide element completely surrounds the respective recess 9 for the passage of the soutache thread 10, resulting in a tubular guide element 22, 23.

Accordingly, two different choices for the implementation of the soutache thread are given. It can be passed either through the recess 9 or through the recess 9a. Likewise, it would be possible to feed two different soutache threads simultaneously through a respective recess 9, 9a.

In Fig. 8 it is shown that the guide member 24 may be formed as a wall member which only partially surrounds the one or both recesses 9, 9a, so that the soutache thread supported only on its underside by the wall-shaped guide member 24 and is carried, but in all other areas freely through the recess 9, 9a can be passed.

Fig. 9 shows in a further modification that in addition to the recess 9 formed as a bore hole-shaped recess 9b may be provided so that through this slot-shaped recess 9b a soutache thread in the form of a band can be passed.

9illustrates that through the one recess 9, an approximately round profiled soutache thread 10 can be passed and through the recess 9b a band-shaped soutache thread, both elements can also be supplied simultaneously.

9 shows the embodiment of FIG. 9, the formation of the wall element 24, which in accordance with Fig. 9 only partially (only on the underside) surrounding the respective recess 9, 9b.

Of course, it is also possible in addition to this graphic representation that the wall element 24 continues upward, so as to enclose both recesses 9, 9b in its entirety, so that the wall element 24 circumferentially closed the respective recesses 9 and / or 9a and / or 9b encloses.

This also applies to all other embodiments shown here.

In Fig. 10 is still shown how the embroidery needle 3 passes under the leadership of the front thread 25 through the needle eye 5 through the recess 14 in the Soutache wheel 6 and then (not shown in the drawing) passes through the fabric 1.

11 shows various embodiments of soutache wheels, which have already been explained with reference to FIGS. 7-9 and illustrate that also a plurality of different soutache wheels 6a, 6b, 6c-as shown in FIGS. 7-9, simultaneously and in parallel via a common rack 26 in the direction of arrows 28 can be driven to oscillate.

Here, the rack 16 is slidably mounted in a base plate 27 and is driven by a rack drive, not shown. Incidentally, FIG. 11 also shows that the soutache thread 10 is fed via a guide tube 30 (see FIG. 2) and the guide tube 30 supports the soutache thread 10.

Fig. 12 shows, as a further embodiment for the formation of guide elements on a soutache wheel 6, that all previously described guide elements 18, 22-24, 30, 32 may also be formed in a wire shape. It can be a round wire or another, arbitrarily profiled wire. As a result, only the peripheral edges of the previously fully formed guide elements are modeled by the wire used, resulting in a significant weight savings. As an exemplary embodiment, two different guide elements 32 and 32a in the form of wire elements are shown in FIG.

It is important in the present invention, therefore, that at the front of the Soutache yarn in the direction of the maximum retracted end of the embroidery needle 3 for the soutache thread supporting guide length 29 is ensured in the direction of the soutache wheel, the one prevents undesirable belly formation of the soutache thread 10 before the inlet through the soutache wheel and therefore causes the soutache thread 10 to sag only slightly (see reference numeral 13 in FIG. 2).

The determination of the guide length 29, i. E. the choice of how far the guide element 18, 22-24, 30, 32 may protrude with its supporting length in the free space 31, resulting from the free space 31 yet arranged further elements such. B. thread cutting knife and the like.

These may not collide with the front of the guide element 18, 22 - 24, 30, 32, therefore, the guide length 29 of the respective guide element 18, 22 - 24, 30, 32 limited by the fact that in this free space 31 even more Elements must be arranged freely movable.

In any case, it is crucial that the length of the sag, due to the distance 15 according to FIG. 1, has been decisively shortened into the length 15, thereby preventing an abdominal formation of a stomach 13 of the soutache thread 10.

drawing Legend

[0070] <Tb> 1 <sep> Fabric <Tb> 2 'sep> Stick level <Tb> 3 <sep> embroidery needle <tb> 4 <sep> top (of 3) <Tb> 5 <sep> bottleneck <tb> 6 <sep> soutache wheel a, b, c <Tb> 7 <sep> Gear <Tb> 8 <sep> axis of rotation <tb> 9 <sep> recess (for 10) a, b <Tb> 10 <sep> Soutache thread <Tb> 11 <sep> arrow <Tb> 12 <sep> arrow <tb> 13 <sep> belly (out of 10) 13 <tb> 14 <sep> recess (for 3) <tb> 15 <sep> distance (slack length) 15 <tb> 16 <sep> distance (from 6 to 2) <tb> 17 <sep> distance (needle distance max.) <tb> 18 <sep> Guide element a, b, c, d <Tb> 19 <sep> bend <Tb> 20 <sep> End <Tb> 21 <sep> bend <tb> 22 <sep> guide element (pipe) <Tb> 23 <sep> ...... (pipe) <Tb> 24 <sep> ...... (wall) <Tb> 25 <sep> Front thread <Tb> 26 <sep> rack <Tb> 27 <sep> base plate <Tb> 28 <sep> arrow <Tb> 29 <sep> guide length <Tb> 30 <sep> guide tube <tb> 31 <sep> free space <tb> 32 <sep> Guide element 32a (wire-shaped)

Claims (10)

1. embroidery machine with a front of the stitching plane (2) arranged plurality of rotatably oscillating driven soutache wheels (6), each of which has a recess (14) for the passage of the embroidery needle (3) and at least one further eccentrically arranged recess (9) for the passage of a soutache thread (10), characterized in that at the front of the Soutache wheel (6) at least one guide element (18, 22-24, 30, 32) is arranged, which the recess (9) for at least partially surrounds the passage of the soutache thread and forms an elongated guide for the soutache thread in the direction of its yarn path before passing through the recess (9) in the soutache wheel (6). 2. Embroidery machine according to claim 1, characterized in that the guide element (18, 22-24, 30, 32) in the free space in front of the Soutache wheel (6) in the direction of the needle tip (4) before the soutache wheel ( 6) is directed. 3. Embroidery machine according to claim 1 or 2, characterized in that the guide element (18, 22-24, 30, 32) is fixedly connected to the soutache wheel (6). 4. The embroidery machine according to claim 1 or 2, characterized in that the guide element (18, 22-24, 30, 32) is releasably and / or interchangeably connected to the soutache wheel (6). 5. Embroidery machine according to one of claims 1 to 4, characterized in that on or in the soutache wheel (6) one or more recesses (9, 9a, 9b) for the implementation of the or the soutache threads (6) each associated Guide elements (18, 22-24, 30, 32) are arranged. 6. Embroidery machine according to one of claims 1 to 5, characterized in that the guide element is formed as a flat, plate-shaped wall element. 7. Embroidery machine according to one of claims 1 to 6, characterized in that the guide element is tubular or sleeve-shaped. 8. embroidery machine according to one of claims 1 to 7, characterized in that the guide element (32, 32a) is formed wire-shaped. 9. embroidery machine according to one of claims 1 to 8, characterized in that the guide element (18, 22-24, 30, 32) is conical in the direction of the longitudinal axis (at an angle to the longitudinal axis) of the embroidery needle (3). 10. embroidery machine according to one of claims 1 to 9, characterized in that the shape of the soutache thread (6) associated recess (9, 9a, 9b) in the soutache wheel (6) the profile of the Soutache thread (6) is adjusted.