EP0937802A2 - Spool carrier for braiding machine - Google Patents

Abstract

The yarn guides (16,17,18) have a body of spring steel wire and make a snap connection with a recessed reinforcement (19,20) on the plastic upper part (7) of the bobbin carrier. The guide can be additionally secured e.g. with a screw.

Description

The invention relates to a coil former Braiding machine that has at least one thread guide.

Coil carriers of a braiding machine are also called bobbins designated. The bobbins are inside the braiding machine guided along curved slideways in one plane so that the threads, yarns or wires of the from Z. B. the bobbin moves the threads left to right, Yarns or wires of the reversed at the same time Alternately tie and stop the bobbin.

Each bobbin or bobbin consists of one Bobbin base, on the underside of which the guide bobbin foot with so-called. Shuttle is located. On the opposite of the bobbin foot The surface of the bobbin base is the so-called coil axis, on the one as a yarn or thread storage serving coil is pluggable. Furthermore, the Bobbin base still structures for the arrangement of thread guides as well as mechanisms for triggering an automatic Exposing the braiding machine, e.g. B. in the event of faults in the yarn or Thread flow.

The yarn drawn off the bobbin runs over thread guides (Wire) or the thread to the so-called braiding point. For education a perfect braid is an even one Thread tension during the running of the braiding machine, so required during the movement of the clapper. Even Thread tension is usually generated in that the drawn yarn or the thread from the bobbin first runs over a fixed thread guide. Under education The thread then runs in a more or less narrow bay via a movable, spring-loaded thread guide and from there finally to a fixed thread guide, from which the thread or yarn leads to the braiding point is.

Due to the thread tension, the yarn or thread runs with not inconsiderable friction over the thread guides, so that these are subject to high wear.

Thread guides are known which, in order to counteract wear, are provided with ceramic thread eyes. A thread end must be threaded through the thread eyes, before the braiding machine can start. Threading is required after changing each coil, but also especially after a thread while the machine is running or yarn is broken. Threading a thread end through closed thread eyes or eyelets from z. B. ceramic material is labor intensive. Therefore it will also open on one side, i.e. slotted eyes or eyes used. These can change while the machine is running solve so that they usually in the designated Brackets of a thread guide are glued in. Also Ceramic thread eyes or eyelets are subject to one Wear and need to be replaced from time to time become, which is made considerably more difficult by gluing. In addition, replacement is also required if a different type of braid on a braiding machine should be produced because there are for every braid again special thread guides adapted to it required.

It should be obvious that with braiding machines with a variety of bobbins or bobbins Retrofitting the thread guide to adapt to each braid to be produced by the necessary Assembly work to be carried out by a specialist are particularly wage-intensive, which has negative effects has the production price of a braid. Longer Assembly times for retrofitting also require one appropriate machine downtime, which is undesirable.

The invention has for its object a bobbin to create a bobbin for a braiding machine, if necessary, its thread guide in the shortest possible time are interchangeable. The interchangeability is recorded of course also replacing worn out ones Thread guide.

This object is achieved in that a Connection between the coil carrier and the respective Thread guide designed as releasable latching if necessary is.

The latching offers the advantage of a quick change connection. The secure hold of the thread guide on Coil carrier is designed accordingly designed, mutually operable Form-locking elements causes, the latching unintentional loosening of the connection once established or bracket prevented. The latching can can of course also be resolved if necessary that then the connection between the coil carrier and the the respective thread guide is immediately canceled. Thread guide can be easily and quickly replaced if necessary.

According to a particularly advantageous further development, that the locking in a resilient way and Way is done. A spring-elastic latching can be if necessary, especially easy to solve again by one Latching, in an advantageous manner Predeterminable spring preload is overcome. This can a thread guide be designed so that it can be used with simple hand-operated tools turned, pulled or onto others Is moved so that the one generating the locking Spring preload is counteracted until the catch is canceled.

A suitable constructive solution provides that each catch is an attachment part located on the bobbin and comprises a connecting part provided on the thread guide, which, overcoming too elastic shape change leading attachment forces, can be locked with the attachment part.

Schnappverbindung" eingehen, mit der der Fadenführer zum einen sicher gehalten aber auch gleichzeitig gegen unbeabsichtigtes Lösen verriegelt ist.Attaching part and connecting part can thus, using appropriate attaching forces, a so-called.

Snap connection "with which the thread guide is held securely on the one hand but is also locked against unintentional loosening at the same time.

Attachment parts are in areas of the bobbin or Bobbin arranged in which to attach a thread guide is. Prefabricated attachments can be sent to the corresponding Components of a bobbin or bobbin can be mounted. This is useful for equipping with attachments Lace on the existing top, mostly as a parallel columnar side part running to the coil axis is trained. The top end of the side panel faces mostly a laterally projecting flap part, which serves to support the free end of the coil axis.

To the weight of the partially at high speed clappers led along the curves or slideways reduce, is in the bobbin of the invention provided that the top is essentially a Plastic elements formed assembly is. The Assembly can be made from appropriately shaped Plastic elements exist, which may be required Metal parts can be combined.

It is particularly advantageous in the inventive Provide coil carriers that each attachment part one the corresponding plastic element of the upper part arranged formation is. An assembly process separate Attachments are not required. Natural sliding properties of the Plastic when snapping the thread guide onto the Plastic attachments are advantageously used. This enables the application forces to be overcome decrease with the attachments when they are off Plastic exist, also with appropriate Shapes, such as B. sloping ramp edges, Undercuts and the like can be provided, which attach and lock the thread guides with the Easier attachments.

Secure locking of a snap connection according to the invention between the attachment part of the bobbin and The connecting part of the thread guide is also thereby achieved that the connecting part of the thread guide one has formed as a spring clip foot section with the assigned attachment part in latching Connection seat can be brought. That of a spread or counteracting squeezing of a clip Spring force ensures the secure mounting and locking of the Thread guide on the bobbin.

In addition to the connecting part, each thread guide also points a thread guide section. This is an advantage open on one side, thereby threading one of the Bobbin running yarn or thread essential is facilitated.

Each thread guide is a bent part with particular advantage made of spring steel wire. The spring steel wire can be used Bend advantage so that the thread guide section U-shaped is trained. Also the following curved one Connecting part of the thread guide can be used as a spring clip acting, also approximately U-shaped foot section his. To create the latching snap connection the U-legs can be used as a spring clip trained foot section or elastically spread compress, depending on the design of the shape of the Attachment part.

The also U-shaped curved thread guide section of the Thread guide has the advantage that it is an open Thread guide forms. Between the legs of the curved Leading section can, however, also put closed eyes or eyes, which is a glue not require because the resilient legs of the Thread guide section an inserted eye or used eyelet can hold sufficiently. Of course could, if necessary, also appropriate adhesive bonds or other types of attachment for thread eyes or Thread eyelets can be selected.

It makes sense to have different thread guides ready, which then through the latching or the Snap connection without further ado using the quick change procedure suitable for equipping bobbins or bobbins are. The advantages of an open thread guide in the form of a Bending parts made of spring steel wire can be used with the Abrasion resistance ceramic, but more closed Thread guide eyes or eyelets, combine that as Areas serving the guide section of the thread guide have an abrasion-resistant coating. Such Coating can e.g. B. be a ceramic coating that according to usual procedures, e.g. B. Melting means Heat application is attachable.

To avoid the risk of unintentionally shaking off one Locking or snap connection during the Preventing machine running can be additional Securing elements may be provided. Every security element can e.g. b. be a compression fitting by especially with a bobbin top in the form of a Assembly of plastic elements, simple screws, preferably with self-tapping thread, so attached be that her head a predetermined position of the as Spring clip formed foot portion of the connecting part of the respective thread guide detected and secured.

Fig. 1

eine Ansicht eines kompletten Spulenträgers bzw. Klöppels,

Fig. 2

eine Seitenansicht des Spulenträgers gemäß Fig. mit durch strichpunktierte Linien einge zeichneten Umrissen einer Spule,

Fig. 3

die in Fig. 1 sichtbare Rückseite des Spulenträgers bzw. des Klöppels,

Fig. 4

eine offene Ausführung eines oberen Fadenführers,

Fig. 5

eine geschlossene Ausführung eines oberen Fadenführers mit Fadenauge,

Fig. 6

eine offene Ausführung eines mittleren Fadenführers,

Fig. 7

die geschlossene Ausführung eines mittleren Faden führers,

Fig. 8

ein Ausführungsbeispiel für einen offenen unteren Fadenführer und

Fig. 9

eine geschlossene Ausführung des unteren Fadenführers mit eingesetztem Fadenauge.

An embodiment of the invention, from which further inventive features result, is shown in the drawing. Show it:

Fig. 1

a view of a complete bobbin or bobbin,

Fig. 2

FIG. 2 shows a side view of the coil carrier according to FIG. 1 with outlines of a coil drawn in by dash-dotted lines,

Fig. 3

1 visible back of the bobbin or bobbin,

Fig. 4

an open version of an upper thread guide,

Fig. 5

a closed version of an upper thread guide with thread eye,

Fig. 6

an open version of a medium thread guide,

Fig. 7

the closed version of a medium thread guide,

Fig. 8

an embodiment of an open lower thread guide and

Fig. 9

a closed version of the lower thread guide with inserted thread eye.

In Fig. 1 is a view of a complete bobbin or bobbin of a braiding machine shown in the essentially includes the following components:

The bobbin pedestal 1 with the bobbin foot 2 underneath and the shuttle 3 arranged thereon, the coil axis 4, around which the lower ratchet wheel 5 rotates and its free one End supported and held by means of a flap part 6 becomes.

Parallel to the coil axis 4 is an upper part 7, which is a essential assembly formed from plastic elements is. At the upper free end 7 of the upper part that is Flap part 6 articulated.

The lower area of the upper part 7 consists of parallel aligned guide columns 8.9, z. B. from Round steel. The guide columns 8.9 are on the Bobbin pedestal 1, d. H. they rise from the Bobbin headers and are attached to it by means of a clamping plate 10 and the associated screw connection 11 firmly mounted. On the guide columns 8, 9 is a tension slide 12 guided longitudinally. The cocking slide 12 has one Rod extension 113, which is in a no further here illustrated bore of the plastic side part 13 of the Upper part 7 extends into it. There is a spring in the hole housed, when the cocking slide 12 is deflected and the pretensioning of the cocking slide 12 holds in the lower, extended position shown here.

14 with a locking slide is referred to that on the guide column 8 is guided longitudinally.

In the extended position shown here, the Gate valve 14 with a not visible cam in the teeth 15 of the ratchet wheel 5.

On the upper part 7 there are thread guides, namely a upper thread guide 16, a side or center Thread guide 17 and one seated on the tensioning slide 12 lower thread guide 18.

All thread guides are open and are bent from spring steel wire.

One of one not shown here, on the Spool axis 4 located bobbin running thread runs first through the open U of the thread guide 17 and there to the lower thread guide 18 and then on to upper thread guide 16, from which the thread to not here braided plaice, which runs approximately in the braiding point of the braiding machine.

Due to the thread tension, the bay or loop of the Thread between the thread guides 17, 18, 16 smaller, so that the thread guide 18 is drawn towards the thread guide 17 or 16 becomes. Since the thread guide 18 sits on the cocking slide 12, the cocking slide 12 deflecting him assigned tension spring, as described above, to the side part 13 of the upper part 7 moved. He is approaching the two other thread guides 16 and 17. Let the Thread tension, the released spring force moves the Tension slide 12 with the thread guide 18 down again, until it hits the locking slide 14.

Each thread guide is by means of releasable latching if necessary on the associated component of the upper part 7 of the Coil carrier attached.

Each catch includes one located on the coil carrier Attachment part. That assigned to the upper thread guide 16 Attachment part is designated 19. The attachment for the middle thread guide has the reference number 20. Das Attachment part for the lower thread guide 18 is on Cocking slide 12, which is also made of plastic, educated.

Each attachment is a corresponding plastic element the upper part 7 arranged formation. The Attachment part 19 is formed by groove-shaped recesses in one head-like thickening of the upper free end of the Formed side part 13 of the upper part, on which also the Flap part 6 is articulated. The thread guide 16 is off Spring steel bent so that he cannot continue with one here visible, but still described below Clamping part clamped and approximately form-fitting the groove-shaped recesses can be used.

An attachment part 20 assigned to the thread guide 17 is one approximately bead-shaped thickening 21, which is on the side part 13 is formed. A connecting part of the thread guide 17 is with its foot section designed as a spring clip, the is U-shaped as described below, overcoming leading to elastic shape change Attaching forces pressed onto the attachment part 20 and in groove-shaped undercuts of the bulge-shaped thickening 21 locked.

The lower thread guide 18 is also U-shaped Foot section also in a receiving groove Plastic existing on the slide valve 12 pushed. The The receiving groove is at the end of the cocking slide 12, ie its Stop face to the gate valve 14, open, so that every time the cocking slide 12 to the Locking slide 14 strikes, a renewed placement of the lower thread guide takes place in a locked position, in case it should have come off.

2 shows a side view of the bobbin or Bobbin according to Fig. 1. With dash-dotted lines a yarn bobbin picked up on the bobbin axis 4 in its Outlined outlined.

The same components have the same reference numbers as in Fig. 1 designated. In Fig. 2 it is indicated that additional Securing elements to secure the locking against automatic release can be provided. As Securing element here serves a screw 22 in FIG. 2, the in by arrows and the dash-dotted line indicated direction to the head 19 and is screwed in to the held on it as Spring clip formed foot section of the upper thread guide 16 secure against unintentional loosening. Since the Thread guide 16 is a bent wire part, lies Foot section in a groove-like depression of the attachment part 19, the screw 22 so next to the groove-shaped recess can be screwed in that the head of the Screw 22 the groove, and thus also the foot section of the Thread guide, overlaps and thus the thread guide 16 backs up.

Fig. 3 shows again a rear view of the bobbin. The same components are again the same Designated reference numbers.

Fig. 4 shows the upper thread guide 16, as a bent wire part in open design.

The thread guide 16 has a thread guide section 23 which merges into a connecting part 24. The connecting part 24 is with the appropriately trained attachment part on Coil carrier, e.g. B. the attachment part 19, can be locked by it form-fitting and under clamping effect in accordance with Attachment part 19 existing groove-shaped depressions can be placed is. As already described, the screw 22 serves as additional securing of the foot section of the Connecting part 24 of the thread guide 16th

Fig. 5 shows an embodiment for a closed Thread guide 16, the guide portion 23 as an eyelet is formed, in which a closed thread guide eye 25 can be used. The insertion can be done by gluing be secured.

Fig. 6 shows an embodiment of the middle thread guide 17 in an open version.

Fig. 6 illustrates how by means of appropriate bending a spring steel wire the connecting part of the Thread guide 17 to a U-shaped spring clip trained foot portion is formed with a assigned attachment part, in particular attachment part 20, in locking connection seat can be brought. The Thread guide section is also U-shaped here trained and again designated 23.

In Fig. 7, the middle thread guide 17 is in a closed Execution shown. The Thread guide section 23 here again consists of a correspondingly curved eyelet in which an eye 25, z. B. from ceramic material, pressed or glued.

Fig. 8 shows a lower thread guide 18 in the open Execution. It is clearly recognizable as a U-shaped one Spring clip bent foot section of the Connecting part 24 and here also U-shaped curved thread guide section 23.

Fig. 9 shows the lower thread guide 18 in a closed Execution. In the thread guide section 23 is a Eye 25 inserted. The connection between the Bobbin holder and the respective thread guide is how described above, designed as a latch, the 4 to 9 is selected such that through the training as bent parts made of spring steel wire there is a spring-elastic latching, the one Rapid replacement of the thread guides enables. Fig. 4 to Fig. 9 illustrates that a bobbin of a braiding machine quickly from z. B. an open version of the thread guides on the closed version can be changed.

Are the foot sections made of spring steel wire always with bent in the same shape, variations of the thread guide sections be bent so that there are coil carriers with any designs and combinations of Equip thread guides in no time and in particular can also be converted.

Claims (14)

Bobbin of a braiding machine, which has at least one thread guide,
characterized,
that a connection between the bobbin and the respective thread guide (16, 17, 18) is designed as a releasable latching if necessary. Coil carrier according to claim 1, characterized in that the locking is resilient. Coil carrier according to claims 1 and 2, characterized in that that each latching one on the bobbin located attachment part (19, 20) and one on the thread guide (16,17,18) existing connecting part (24), which overcoming too elastic a change in shape leading attaching forces with the attaching part (20) can be locked. Coil carrier according to one of claims 1 to 3, characterized characterized in that it has an upper part (7) which has at least one attachment part (19, 20). Coil carrier according to claim 4, characterized in that the upper part (7) consists essentially of plastic elements formed assembly is. Coil carrier according to claim 5, characterized in that each attachment part (19, 20) on the corresponding one Plastic element of the upper part (7) arranged Formation is. Coil carrier according to one of claims 1 to 6, characterized characterized in that the connecting part (24) of the Thread guide (16,17,18) one as a spring clip trained foot portion which with the assigned attachment part (19, 20) in latching Connection seat can be brought. Coil carrier according to one of the preceding claims, characterized in that each thread guide (16, 17, 18) a thread guide section open on one side (23) having. Coil carrier according to one of claims 1 to 8, characterized characterized in that each thread guide (16,17,18) a Bending part is made of spring steel wire. Coil carrier according to one of the preceding claims, characterized in that the one-sided open Guide section (23) of the thread guide (16,17,18) as Holder for closed thread eyes that can be used in it (25) is formed. Coil carrier according to one of claims 1 to 10, characterized characterized in that serving as a guide section (23) Areas of the thread guide (16,17,18) an abrasion-resistant Have coating. Coil carrier according to claim 11, characterized in that the coating is a ceramic coating. Coil carrier according to one of the preceding claims, characterized in that additional Securing elements to secure the locking against automatic release are provided. Coil carrier according to claim 13, characterized in that that each securing element is a clamping screw (22).

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