EP1518015B1 - Module for textile machines, especially stitch-forming machines - Google Patents

Description

In knitting machines or other knitting machines modules are often used which hold a group of special tools. Such modules are often mounted as a group in larger numbers on a support, a so-called bar, and perform together a working movement, such as a reciprocating motion. This results in requirements for the modules that have not been solved or not to the full satisfaction. Such modules must precisely hold the individual tools with respect to the bar, other tools needed for cooperation, and with respect to one another. The precision of the positioning of the individual tools is particularly in fine divisions, i. at small tool intervals for the proper functioning of the tools of importance. This also applies to the exact positioning of the tools to Barre and other tools.

If the textile machine is to achieve a high operating speed, it is desirable that the modules have as small a mass as possible in order not to let the acceleration and braking forces become too great during the execution of the reciprocating movement. However, the precise storage of the tools must be maintained with all weight savings. Tools that are summarized in modules in the aforementioned type, for example, so-called closers, guide needles, knives, looper, Reetfinger, hooks and others Tools that are combined on the module to a comb-like structure.

From the DE 19803474 C1 Such a comb-like structure with a plurality of prongs and a manufacturing method for this is known. The tines are arranged parallel and at a distance from each other. They are held with one end between two adhesive tapes glued together and extend away from them.

If such a structure attached to a bar, it may cause problems because of the flexibility of the tapes. In addition, the exact relationship between the individual prongs and the bar over the tapes to convey.

From the DE 19757962 A1 is a package of several, adjacent plate-shaped components known, which are firmly connected. The components have through holes, which are penetrated by a tube. Thus, the components are threaded at a distance from one another on one or more tubes. The tube has been expanded in a subsequent step from the inside, so that the individual components sitting positively and non-positively on the pipe. You are held by it.

In making a package of individual tools, this approach makes it difficult to meet high accuracy requirements, especially when dealing with small tools.

From the DE 19854191 A1 is a package of several flat components known, which are held by rods parallel and spaced from each other. The rods extend through openings of the plate-shaped components and consist of Metal, such as stainless steel or carbon steel. For bonding between the bars and the tools, an adhesive is suggested.

Even with this structure, accuracy problems can arise.

From the DE 44 06 622 A1 is a Lochnadelfassung known whose holder holds a plurality of needle needles in parallel alignment at a distance from each other. The socket is formed according to a first embodiment by a shaped body which consists of a zinc alloy and has a ribbed plate-shaped portion for receiving the ends of the hole needles. The ends of the U-shaped bent needles are fixed here by soldering or gluing.

In another, resulting from this document embodiment, the socket is formed by a one-piece, plate-shaped body made of plastic, which is provided on both sides with ribs at one end, between which the wire-shaped ends of the hole needles are attached.

The production of such a Lochnadelfassung is associated with a not to be underestimated effort.

From the DE 199 20 673 A1 For example, a board segment is known that comprises a group of mesh-forming elements of identical design. These are provided at one end with two spaced holes. The stitch-forming elements are then arranged at a distance parallel to each other, after which in each case a synthetic resin strand is introduced with a dosing into the aligned holes. After curing, the synthetic resin strands keep the mesh-forming elements at a distance. The production The adhesive strands are made by means of an automatic dosing unit whose dosage and travel speed must be precisely set. This setting is critical because it depends largely on the consistency of the resin.

From the DE 42 24 490 C2 For example, a method of making pin-hole modules is known. It is assumed that both the hole needles and the mounting body for the storage of the hole needles on the bar are completely seamless and thus integrally formed of plastic. For this purpose, a clam shell shape is provided, the engraving of which corresponds to the outer contour of the individual perforated needles and their holding bodies. The mold is filled in a casting process with suitable plastic, which forms the module after its solidification.

Plastic puncture needles are really only suitable for a few applications. As a rule, tools made of metal are preferred.

From the US Pat. No. 3,823,581 A is a module known with tools that are held in slots of a module body. The module also includes a clamping piece, which is tightened by screws on the base body, thereby pressing on the lying in the slots shafts of the tools.

On this basis, it is an object of the invention to provide a module for textile machines, which meets high accuracy requirements, has a low weight and is to produce in a rational manner.

• Das erfindungsgemäße Modul weist mehrere Werkzeuge auf, die jeweils einen Funktionsabschnitt und einen Halteabschnitt aufweisen. Der Halteabschnitt dient der Positionierung des Werkzeugs an einem Halter, d.h. beispielsweise einer Barre. Er weist wenigstens eine Ausnehmung auf, die von einem Kunststoffkörper durchsetzt ist. Dieser bindet alle Werkzeuge zu einem Modul zusammen, der nur im Ganzen gehandhabt werden kann. Eine metallische Verbindung zwischen den Halteabschnitten besteht nicht. Es besteht auch sonst keine metallische Verbindung zwischen den Werkzeugen. Der Kunststoffkörper weist ein wesentlich geringeres Gewicht auf als ein entsprechender alternativ verwendbarer Metallkörper. Außerdem kann er die einzelnen Werkzeuge dauerhaft und präzise in Bezug aufeinander halten. Indem er die Ausnehmung des Halteabschnitts durchgreift lässt sich ein Formschluss erzielen, so dass das einzelne Werkzeug nicht ausschließlich auf die Haftung zwischen Kunststoff und Metall angewiesen ist, wenn die Werkzeuge aus Metall bestehen.

This object is achieved by the module having the features of patent claim 1:

• The module according to the invention has a plurality of tools, each having a functional portion and a holding portion. The holding section serves to position the tool on a holder, ie for example a bar. He has at least one recess which is penetrated by a plastic body. This combines all the tools into a module that can only be handled as a whole. A metallic connection between the holding sections does not exist. There is otherwise no metallic connection between the tools. The plastic body has a much lower weight than a corresponding alternatively usable metal body. In addition, he can keep the individual tools permanently and precisely in relation to each other. By passing through the recess of the holding portion can achieve a positive connection, so that the individual tool is not dependent solely on the adhesion between plastic and metal when the tools are made of metal.

The holding section of a tool preferably has at least one contact surface which is exposed. This contact surface (s) can (can) be used to position the module on a bar. The tools are thus directly, ie stored without interposition of any other elements on the bar, so that with precise formation of the bar and precise training of the individual tools, a precise positioning of the tools is achieved on the bar. This is especially true when the contact surfaces of the tools lie in a common plane. This can be achieved, for example, in that all the tools are aligned parallel to one another and aligned with one another and at a distance from one another.

The holding portion and the functional portion of each tool are preferably integrally connected with each other. For example, the tools may be stampings or other metal parts. The one-piece design of the tools avoids accuracy problems in the relative positioning of the holding section and functional section.

In a preferred embodiment, the tools are interconnected exclusively via the plastic body. It lacks any other means of connection. This creates a simple structure and the possibility of simple production.

The plastic body is preferably in positive engagement with the tools as well as alternatively or additionally in cohesive connection. This can be achieved by providing the holding section with one or more recesses located substantially in its central area. The plastic body penetrates this recess and, in so doing, it engages over the edge of the recess, holding the plastic body in a positive and cohesive manner. The plastic body can be produced as an injection molded body. In this case, the injection mold may be formed so that the individual tools, especially at their storage sections in the injection mold remain immovable until the plastic body is completed. It can thus achieve a very accurate positioning of the tools. This applies in particular if the plastic body does not reach the outer edge of the holding sections, so that the entire or almost the entire edge of the holding sections remains free. Here, the holding sections can be taken and positioned during the production of the plastic body. Alternatively, it may be enough to grasp and hold the holding portions at least at two opposite points of their edge.

In an alternative embodiment, one or more open-edged recesses are provided for the plastic body. This embodiment has the advantage that the plastic body can be manufactured separately, wherein the holding portions of the individual tools are then inserted, for example, in preformed slots of the plastic body. The continuous part of the plastic body passes into the recess and forms the connection between the tools. It is advantageous if two provided on mutually opposite edges of the holding portion recesses form the receptacles for plastic body. In this way, a compact module is obtained.

In a further modified embodiment, the plastic body may have a contact surface. This can be advantageous if the special plastic properties, which are for example in its internal damping or its elasticity, between the bar and the tools to be effective. It is also possible to combine the contact surfaces of the holding portions with the contact surface of the plastic body, so that the holding portions lie at one point even on the bar, while they rest indirectly elsewhere on the plastic body on the bar.

The plastic body may be constructed of a thermoplastic, of a thermosetting plastic, of a single- or multi-component plastic and of a fiber-reinforced plastic. This depends on the desired manufacturing process and on the result to be achieved.

• Figur 1 ein erfindungsgemäßes Modul in perspektivischer, schematisierter Darstellung,
• Figur 2 das Modul nach Figur 1 in ausschnittsweiser Draufsicht,
• Figur 3 das Modul nach Figur 2, geschnitten entlang der Linie III-III,
• Figur 4 eine abgewandelte Ausführungsform des Moduls in ausschnittsweiser Draufsicht,
• Figur 5 das Modul nach Figur 4, geschnitten entlang der Linie V-V,
• Figur 6 eine weitere abgewandelte Ausführungsform des Moduls in ausschnittsweiser Draufsicht und
• Figur 7 das Modul nach Figur 6, geschnitten entlang der Linie VII-VII.

Further details of advantageous embodiments of the invention will become apparent from the drawings, the description and dependent claims. In the drawings, embodiments of the invention are illustrated. Show it:

• FIG. 1 an inventive module in a perspective, schematic representation,
• FIG. 2 the module after FIG. 1 in a sectional plan view,
• FIG. 3 the module after FIG. 2 , cut along the line III-III,
• FIG. 4 a modified embodiment of the module in a sectional plan view,
• FIG. 5 the module after FIG. 4 , cut along the line VV,
• FIG. 6 a further modified embodiment of the module in a sectional plan view and
• FIG. 7 the module after FIG. 6 , cut along the line VII-VII.

In FIG. 1 Figure 1 illustrates a module 1 intended for use in a stitch forming machine. It has several tools 2. Each individual tool 2a, 2b, 2c, 2d, 2e, 2f, 2g, 2h, 2i is precisely positioned with respect to the other tools 2. The tools 2 are in the in FIG. 1 specified embodiment normally open. However, it may also be in detail to knife, looper, Reetfinger, hooks, guide needles or other tools, as they are needed in textile machines, provided that they perform a common working movement in constant relative position.

The tools 2 are identical to each other and have a plate-like basic shape. They are laterally aligned with each other in the module and held parallel to each other at a distance, so that they define a comb-like functional area 3 to these a holding portion 4 connects, which is used to attach the module 1 to a corresponding support, such as a bar of a stitch-forming machine , serves. The tools 2 each have a finger-like functional section 5a, 5b, 5c, 5d, 5e, 5f, 5g, 5h, 5i and a holding section 6a, 6b, 6c, 6d, 6e, 6f, 6g, 6h, 6i. The functional portions 5 are integrally connected to the holding portions 6, respectively. For example, the tools 2 are formed by stampings.

The holding sections 6 are connected to each other via a plastic body 7, which connects the tools 2 inextricably linked. The plastic body 7 is designed so that it passes through all the holding sections 6, wherein it leaves the edge 8a, 8b, 8c, 8d, 8e, 8f, 8g, 8h, 8i but at least partially free, ie not reached. As a result, the narrow edges 8a, 8b, 8c, 8d, 8e, 8f, 8g, 8h, 8i form contact surfaces for positioning the tools of a module on a bar. The contact surfaces lie in a common plane and thus together form the (subdivided) contact surface of the holding region 4.

The structure of the holding portion 4 is in particular from the FIGS. 2 and 3 out. In FIG. 2 the plastic body 7 and the tool 2a, 2b and 2c are illustrated. As can be seen, the edges 8a, 8b, 8c lie in the common plane E, to, as FIG. 3 illustrated to abut a flat surface 9 of a schematically indicated bar 11. The same applies to areas of the edges 8a, 8b, 8c on the long narrow sides of the holding sections 6. These are also arranged in a respective common plane and are located on contact surfaces 12, 14 of the bar 11 at. The approximately rectangular in side view holding portion 6a has a preferably also approximately rectangular central recess 15 in the form of an elongated opening which is surrounded by an edge 16. This includes with the outer edge 8a a strip 17 preferably a constant width.

The plastic body 7 extends through the recess 15 and engages over the edge 16 of the opening 15 in each case on both flat sides. The strip 17 is thereby approximately half sunk into the plastic body 7. As in particular from FIG. 2 can be seen between adjacent holding portions 6a, 6b groove-like spaces 18. The plastic body 7 has an approximately rectangular cross section, so that the gap 18 extends along the entire edge 8 of the holding portion 6a and 6b. This applies to all other holding sections 6 accordingly.

If the holding area 4, how FIG. 3 schematically illustrated, arranged in a bar 11 and clamped, the positioning of the holding portion 4 and thus of the module 1 by the almost linear contact of the respective edges 8a, 8b, 8c, 8d, 8e, 8f, 8g, 8h, 8i at the contact surfaces 9, 12, 14 reached. This results in high surface pressures resulting in a high positioning safety. If necessary, one or more projections may be provided on the abutment surfaces 9, 12, 14 be, which engage in the intermediate spaces 18, to effect a lateral positioning of the module 1.

The FIGS. 4 and 5 illustrate a modified embodiment of the module 1. As far as no separate explanations are given below, this module agrees with the module Figure 1 to 3 match. Reference is made to the above description with reference to the same reference numerals.

In contrast to the module described above, the module according to the FIGS. 4 and 5 in its holding portion 4 on a plastic body 7, which comprises the holding portions 6 not at a central opening but at its respective edge 8a, 8b, 8c, 8d, 8e, 8f, 8g, 8h, 8i. The plastic body 7 extends to the contact surfaces 12, 14, ie its outer surfaces 21, 22 are aligned with edge portions 23, 24, 25, 26 of the holding sections 6. Between the arranged on the long narrow sides of the holding cuts 6 edge portions 23, 24 and 25, 26 are each recesses 27, 28 provided in the form of indentations, which may for example have a rectangular outline and are open-edged. The recesses 27, 28 are filled by corresponding parts of the plastic body 7, which otherwise covers the flat sides of the holding portions 6 substantially. On the narrow side, interspaces 18 can again remain between the holding sections 6 in order to favor the positioning in the bar 11. As in the above embodiment, the holding portions 6 are held in the plastic body 7 both positive and cohesively by the adhesion between the base material of the plastic body 7 and the metal of the holding portions 6. If necessary, the plastic body 7 can also protrude beyond the planes defined by the edge sections 23, 24 and 25, 26, so that it does not touch the contact surfaces 12, 14. However, it can also be very slightly, for example, a few hundredths of a millimeter over these defined by the edge portions 23, 24 and 25, 26 levels protruding to support a resilient clamping action thanks to its inherent elasticity.

Instead of a single compact plastic body 7, two partial bodies 7a, 7b may also be provided which, for example, abut one another at a center line 29, are connected to one another or here define a gap with one another. The plastic body 7a, 7b may be prefabricated and attached to the holding sections 6 in an assembly process. A fixation can be done by heat, by adhesive or by friction.

• Bei dem Modul 1 nach den Figuren 6 und 7 sind die Ausnehmungen 27, 28 so verbreitert, dass die Randabschnitte 23, 26 der Halteabschnitte 6 entfallen. Es verbleiben die Randabschnitte 24, 25, die in direkter Anlage mit den Anlageflächen 12, 14 stehen. Außerdem stehen die Halteabschnitte 6 mit ihrer Schmalseite in direkter Anlage mit der Anlagefläche 9. Somit liegen die Halteabschnitte 6 wie bei allen vorstehend beschriebenen Ausführungsformen an drei Seiten des Haltebereichs 4 frei zu Tage und zwar an den beiden einander gegenüber liegenden Flachseiten des Halteabschnitts 4 sowie an der von den Werkzeugen 2 abliegenden Schmalseite. Darüber hinaus erstreckt sich der Kunststoffkörper 7 durch die Ausnehmungen 27, 28, wobei an dem Kunststoffkörper 7 Anlageflächen 31, 32 ausgebildet sind, die die Randabschnitte 23, 26 des Moduls 1 nach Figur 5 ersetzen. Die Anlageflächen 31, 32 sind an den Flachseiten des Haltebereichs 4 in unmittelbarer Nachbarschaft zu dessen Schmalseite angeordnet. Die Anlageflächen 31, 32 stehen etwas über den übrigen Kunststoffkörper 7 über. Wird beispielsweise ein zähelastischer Kunststoff gewählt, der inhärente Feder- und Dämpfungseigenschaften aufweist, kann das Modul 1 auf diese Weise durch direkte Metall/Metall-Anlage zwischen den Halteabschnitte 6 und der Barre 1 präzise gelagert werden. Durch die dem Kunststoff inhärente Nachgiebigkeit, die durch die Ausbildung der Anlageflächen 31, 32 als schmale Streifen in besonderem Maße genutzt werden kann, ergibt sich darüber hinaus eine hohe Toleranzunempfindlichkeit des Moduls 1 gegenüber der Barre 11. Wird der Kunststoff als nachgiebig angesehen, bilden die Randabschnitte 24, 25 und der Rand 8 im oberen schmalseitigen Endbereich des Haltebereichs 4, eine Dreipunktanlage.

Another embodiment of the invention is in the FIGS. 6 and 7 illustrated. While the positioning of the module 1 on the bar 11 in the embodiments described above takes place exclusively by direct contact between the holding sections 6 and the contact surfaces 9, 12, 14, a different principle is chosen in the embodiment described above:

• In the module 1 after the FIGS. 6 and 7 are the recesses 27, 28 widened so that the edge portions 23, 26 of the holding sections 6 omitted. There remain the edge portions 24, 25, which are in direct contact with the contact surfaces 12, 14. In addition, the holding sections 6 are free with their narrow side in direct contact with the contact surface 9. Thus, the holding sections 6 as in all the embodiments described above on three sides of the holding portion 4 to day and on the two opposite flat sides of the holding portion 4 and the off the tools 2 narrow side. In addition, the plastic body 7 extends through the recesses 27, 28, wherein on the plastic body 7 contact surfaces 31, 32 are formed, the edge portions 23, 26 of the module 1 after FIG. 5 replace. The contact surfaces 31, 32 are arranged on the flat sides of the holding region 4 in the immediate vicinity of its narrow side. The contact surfaces 31, 32 are slightly above the remaining plastic body 7. For example, if a tough elastic plastic is chosen, which has inherent spring and damping properties, the module 1 can be precisely stored in this way by direct metal / metal system between the holding sections 6 and the Barre 1. Due to the plastic inherent resilience, which can be used by the formation of the contact surfaces 31, 32 as a narrow strip to a particular extent, there is also a high tolerance insensitivity of the module 1 against the Barre 11. If the plastic considered compliant, form the Edge portions 24, 25 and the edge 8 in the upper narrow-side end portion of the holding portion 4, a three-point system.

As in the embodiment described above, the plastic body 7 may be integrally formed or consist of two parts which are pushed from the long narrow sides of the holding portions 6 ago on this. The fixation can be cohesively by adhesive or by friction. The latter has the advantage of demountability.

Further advantageous embodiments and modifications are possible. For example, the edge 8 of the module after FIGS. 2 and 3 be provided with one or more recesses to reduce the contact area between the edge 8 and the abutment surfaces 9, 12, 14 Moreover, the holding portions 6 of the embodiments can after FIGS. 4 to 7 be provided with openings through which the plastic body 7 extends. This allows an even more intimate connection between the plastic and the tools 2 can be achieved.

A module for textile machines has a plurality of tools 2 with holding sections 6. These are taken in a plastic body 7, the or the holding portions 6 at one or more recesses 15, 27, 28 or. It serves for the correct fixing of the tools 2 in relation to each other. The positioning of the tools 2 with respect to a bar 11, however, takes place by direct contact between the holding sections 6 and the bar 11. By filling the existing between the holding sections gap-shaped spaces with plastic is a compact, but easier holding area 4 for the module. 1 receive.

LIST OF REFERENCE NUMBERS

1

module

2

Tools

2a to 2i

Tool

3

functional area

4

holding area

5

functional sections

5a to 5i

function section

6

holding portions

6a to 6i

holding section

7, 7a, 7b

Plastic body

8a to 8i

edge

9

contact surface

11

bar

12, 14

contact surface

15

recess

16

edge

17

strip

18

gap

21, 22

exterior surfaces

23, 24, 25, 26

edge sections

27, 28

recesses

29

center line

31, 32

contact surfaces

e

level

Claims (18)

1. Module (1) for textile machines, in particular stitch-forming machines,
   with a plurality of metal tools (2), which have function sections (5) and holding sections (6),
   wherein the holding sections (6) respectively have at least one recess (15, 27, 28), through which a plastic body (7) passes,
   characterised in that
   the plastic body (7) is an injection moulding, which passes through the recess (15, 27, 28) and engages over its edge.
2. Module according to claim 1, characterised in that the holding section (6a) of at least one tool (2a) has at least one abutment surface (8a), which lies freely exposed.
3. Module according to claim 1, characterised in that the tools (2) are held parallel to one another, in alignment with one another and spaced from one another.
4. Module according to claim 1, characterised in that the tools (2) are configured uniformly.
5. Module according to claim 1, characterised in that the holding sections (6) and the function sections (5) are respectively connected to one another in one piece.
6. Module according to claim 1, characterised in that the tools (2) are connected to one another by the plastic body (7).
7. Module according to claim 1, characterised in that the tools (2) are connected to one another solely by means of the plastic body (7).
8. Module according to claim 1, characterised in that the plastic body (7) engages positively with the tools (2).
9. Module according to claim 1, characterised in that the plastic body (7) is integrally connected to the tools (2).
10. Module according to claim 1, characterised in that the recess (15, 27, 28) respectively provided in the holding sections (6) passes centrally through the holding sections (6).
11. Module according to claim 10, characterised in that the recess (15) has a closed edge (16) adjoining its entire periphery.
12. Module according to claim 1, characterised in that the recess (27, 28) is open-edged.
13. Module according to claim 1, characterised in that open-edged recesses (27, 28) are configured on two opposite sides of the holding section (6).
14. Module according to claim 1, characterised in that the plastic body (7) fills the entire recess (15) and projects over its edge (16), but at least in some locations does not reach the outer periphery of the holding section (6).
15. Module according to claim 1, characterised in that the plastic body (7) projects beyond the holding sections (6) of the tools (2) at least at one location.
16. Module according to claim 1, characterised in that at least one abutment surface (31) is configured on the plastic body (7).
17. Module according to claim 1, characterised in that abutment surfaces (24, 25, 31, 32) are configured both on the holding sections (6) and on the plastic body (7).
18. Module according to claim 1, characterised in that the plastic body (7) is made from a fibre-reinforced plastic.

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