EP2998421A1 - Heald frame coupling and heald frame with the same - Google Patents

Abstract

Described and claimed is a Webschaftkupplung (1) for connecting a weaving shank (11) with a shaft drive, with the following features: a) the Webschaftkupplung (1) comprises two coupling elements (2,3), of which the first (2) with the weaving shank (11) and the second (3) is connectable to the shaft drive b) the coupling elements (2, 3) can be brought into a releasable connection by a relative movement with respect to one another which runs essentially along the direction of movement (z) of the shaft c) at least one of the two coupling elements (2, 3) has a latching element (4) which runs essentially along the direction of movement (z) of the heald frame (11), d) the latching element (4) has a clamping surface (5) which also extends in at least one of the two spatial directions (x, y) running transversely to the direction of movement (z) of the shaft, e) the other coupling element (2,3) has at least one clamping element (8) for engaging the clamping surface (5) as new and inventive is considered that f) the at least one latching element (4) is heterogeneous. In addition, a weaving shank 11 is described and claimed, which has a coupling element (2,3) with such a latching element (4).

Description

Webschaftkupplungen and heald frames are known. Webschaftkupplungen of the generic type provide a connection between weaving shank and Webschaftantrieb. Often this is a bumper, which transmits the power of the weave drive, connected to the heald. The Webschaftkupplungen here are composed of two coupling elements, one of which is assigned to the shaft and the other the shaft drive. Among the requirements of such a Webschaftkupplung counts fast release or connectivity and ensuring a largely backlash-free connection. The EP 0117 826 B1 shows a generic Webschaftkupplung. The heddle associated coupling element has as a basic component a stud, which is fastened with screws on the heald. On the stud a hexagon is hung rotatably. The other - the Webschaftantrieb associated coupling element has a ramp to which the hexagon usually after a vertical downward movement - which corresponds to the downward movement of the weaving shank in operation - can be lowered. The end region of the bumper of the shaft drive is shaped like the mouth of a hexagonal wrench, which opens in the horizontal direction - ie orthogonal to the Webschaftbewegungsrichtung -. The hexagon placed on the ramp can be easily pushed horizontally in this mouth. To close the clutch, it is locked there with a pivoting locking element.

• a) die Kupplungselemente sind durch eine Relativbewegung zueinander, die im Wesentlichen entlang der Bewegungsrichtung (z) des Schaftes verläuft, in eine lösbare Verbindung bringbar,
• b) zumindest eines der beiden Kupplungselemente verfügt über ein Einrastelement, das im Wesentlichen entlang der Bewegungsrichtung (z) des Schaftes verläuft,
• c) das Einrastelement verfügt über eine Spannfläche, die sich auch in zumindest einer der beiden quer zu der der Bewegungsrichtung (z) des Schaftes verlaufenden Raumrichtungen (x,y) erstreckt,
• d) das andere Kupplungselement verfügt über zumindest ein Spannelement zum bevorzugt spielfreien Einrasten der Spannfläche.

Further advanced versions of Webschaftkupplungen be in the pamphlets EP 0 407 335 A1 . DE 196 40 370 C1 . DE 43 43 882 C1 and DE 195 48 848 C1 shown. These documents disclose heald couplings with two coupling elements with the following features:

• a) the coupling elements can be brought into a releasable connection by a relative movement towards one another which runs essentially along the direction of movement (z) of the shaft,
• b) at least one of the two coupling elements has a latching element which runs essentially along the direction of movement (z) of the shaft,
• c) the latching element has a clamping surface which also extends in at least one of the two spatial directions (x, y) extending transversely to the direction of movement (z) of the shaft,
• d) the other coupling element has at least one clamping element for preferably play-free engagement of the clamping surface.

• Oft ist die Verbindung zwischen den Webschaftkupplungen schwer lösbar. Auch beim Zusammenfügen erweisen sich die Kupplungen als schwergängig.

The Webschaftkupplungen shown in the latter documents enjoy a good reputation. However, they also have disadvantages:

• Often the connection between the Webschaftkupplungen is difficult to solve. Even when joining the clutches prove to be stiff.

The object of the present invention is to remedy these disadvantages. The object is solved by the claims 1 and 15.

According to the invention, the latching element should be heterogeneous. The term "heterogeneous" in this case includes that the latching element is integrally formed and has zones of its spatial extent, which consist of different materials or material compositions. Such a latching element can be produced, for example, in the sintering process. In the area of the clamping surface of the latching element, the concentration of cemented carbide sintered components such as tungsten carbide is advantageously particularly high. In the region of the tip of the latching element, which protrudes in the direction of movement of the shaft furthest in the direction of the other coupling element, it is advantageous to mix the sintered material increasingly substances that reduce the friction of the outer surface of the latching. These materials include bronze components, but also - as far as the sintering process allows - graphite components.

The addition of softer materials - such as brass - has in the areas of the latching element, in which impacts with other components come about can, its advantages. The latching element is usually exposed to a high tensile load. If the tensile load for the use of certain sintered materials is a problem, larger and especially longer components made of solid material can be brought into the sintering mold in order to absorb the tensile load. These can again consist of metals or carbon or glass.

The term "heterogeneous" also includes in the above context that the latching element is composed of different components. These components may be different or the same from their composition and / or their manufacturing process, wherein the shape of the components may be different. In general, it comes with the use of different components for producing a latching element to form joints between these components. These latching elements are advantageously not in one piece; they can be multi-part.

The production of at least one latching element made of different materials brings a number of advantages. In this way, cost advantages can be achieved compared with production from solid material, in particular homogeneous solid material. Hollow components can be combined with components made of solid material. Solid metal parts can be combined with sintered parts and / or parts made of plastic injection molding.

Often, the tip of the first latching member which cantilevers or points furthest toward the other coupling member, to which the first latching member is not associated, is made of a different material than the clamping surface. Teflon can be used in the manufacture of the component that at least partially defines the tip. This component can also be a plastic injection molded part. It can also be made of sheet metal.

In connection with the term "latching element" is to be mentioned that this usually means an elongated component, which may have over partially rounded corners. As already mentioned show advanced versions of Webschaftkupplungen according to the publications EP 0 407 335 A1 . DE 196 40 370 C1 . DE 43 43 882 C1 and DE 195 48 848 C1 such latching elements. These latching elements are often pivotally articulated in places, wherein the articulation is realized via a bore through which an axle engages. Sometimes there are slip rings and bearing rings, which ensure the pivoting of the latching element about the axis. The latter parts are not part of the "locking element" in the sense of this document. The same applies to the axis. All these components are often in one piece.

The above-mentioned components of the latching element can be fastened by latching connections to another component, often a basic component. The base member is advantageously hinged to another component of its coupling element. This linkage, which often ensures the connection to the heald shaft or its drive, can be permanent but solvable (eg screw connection). For this purpose, the linkage may comprise a bore through which an axle passes. The articulation can thus ensure a pivoting of the latching element.

The basic component of the latching element advantageously also comprises at least one clamping surface. The latching element advantageously comprises U-shaped components. In an advantageous development of this idea, it may be the U-shaped components which are attached to the basic component. For this purpose, they can have additional latching elements. Shoes which can be pushed onto abutment edges of the latching element and / or the "tip" of the latching element (the part of which protrudes in the direction of movement of the shaft furthest in the direction of the other component) may be formed in this way. That the various components of the latching element are not integral, is a development of the invention. The different components or the different zones of the spatial extent of the latch member may be made of different materials having different physical properties. Thus, the tip can have a low adhesion and / or sliding coefficient (eg Teflon). The component comprising the clamping surface is advantageously hard (or harder than the others). Grinding or butting edges can be made of softer materials such as brass or have a higher brass concentration.

Thus, the stop edges of the latching element can be protected by shoes that are attachable or pushed. They can be molded from relatively soft material.

Fig. 1:

Figur 1 zeigt eine Webschaftkupplung mit zwei entkuppelten Kupplungselementen in der Seitenansicht

Fig. 2:

Figur 2 zeigt dieselbe Webschaftkupplung mit zwei eingekuppelten Kupplungselementen in der Seitenansicht, wobei der Webschaft angedeutet ist.

Fig. 3:

Figur 3 zeigt eine Explosionsskizze des webschaftseitigen Kupplungselements

Fig. 4:

Figur 4 zeigt eine Explosionsskizze des Einrastelements des webschaftseitigen Kupplungselements

Fig. 5:

Figur 5 zeigt eine Skizze einer Kappe eines Einrastelements

Fig. 6:

Figur 6 zeigt einen Querschnitt eines Anschlagschuhs eines Einrastelements

Fig. 7:

Figur 7 zeigt eine perspektivische Ansicht eines Anschlagschuhs eines Einrastelements

Fig. 8:

Figur 8 zeigt eine Explosionsskizze einer zweiten leicht abgewandelten Ausführungsform eines webschaftseitigen Kupplungselementes

Fig. 9:

Figur 9 zeigt das Grundbauteil des Einrastelements des zweiten Ausführungsbeispiels des webschaftseitigen Kupplungselementes in der Vorderansicht

Fig. 10:

Figur 10 zeigt die Kappe des Einrastelements des zweiten Ausführungsbeispiels des webschaftseitigen Kupplungselementes in perspektivischer Ansicht

Fig. 11:

Figur 11 zeigt das Einrastelement eines dritten Ausführungsbeispiels des webschaftseitigen Kupplungselementes in der Vorderansicht

In the following, the present invention will be explained in more detail by exemplary embodiments with reference to FIGS. The featured features of each Embodiments can be transferred in an advantageous manner to the invention in its most general form.

Fig. 1:

FIG. 1 shows a Webschaftkupplung with two uncoupled coupling elements in the side view

Fig. 2:

FIG. 2 shows the same Webschaftkupplung with two coupled coupling elements in the side view, wherein the weaving shank is indicated.

3:

FIG. 3 shows an exploded view of the webschaftseitigen coupling element

4:

FIG. 4 shows an exploded view of the latching element of the webschaftseitigen coupling element

Fig. 5:

FIG. 5 shows a sketch of a cap of a latching element

Fig. 6:

FIG. 6 shows a cross section of a stop shoe of a latching element

Fig. 7:

FIG. 7 shows a perspective view of a stop shoe of a latching element

Fig. 8:

FIG. 8 shows an exploded view of a second slightly modified embodiment of a webschaftseitigen coupling element

Fig. 9:

FIG. 9 shows the basic component of the latching element of the second embodiment of the webschaftseitigen coupling element in front view

Fig. 10:

FIG. 10 shows the cap of the latching element of the second embodiment of the webschaftseitigen coupling element in a perspective view

Fig. 11:

FIG. 11 shows the latch member of a third embodiment of the webschaftseitigen coupling element in front view

FIG. 1 shows a Webschaftkupplung 1 with a webschaftseitigen 2 and a drive-side coupling element 3 in the uncoupled state. The webschaftseitige coupling element 2 is equipped with a latching element 4, which has inter alia on the clamping surface 5 and the articulation. 6 pivotally hinged to other components of the web-side drive element 2.

Of the drive-side coupling element 3, the base plate 7, the locking lug 8, the guide rod 9 and the shaft rod 10 are shown in the figures. Normally, such a (female) coupling element 3 also has a second base plate, which would, however, deny the observer of the figures insight into the interior of the drive-side coupling element 3. For this reason, has been dispensed with the representation of such a plate.

In FIG. 2 the same coupling 1 is shown, wherein the coupling elements have been offset by a relative movement along the direction of movement of the heald shaft 11 in its engaged state. During the relative movement, the latching element 4 has slid along the right flank of the guide rod 9 in the direction of its end position. Upon reaching the end or locking position of the two coupling elements 2 and 3, the pivotable about the articulation 12 locking lug 8 determines the webschaftseitige coupling element 2 by blocking the clamping surface 5 of the latching element 4. In order to cause the necessary pivotal movement or to hold the latching nose in its blocking end position, it requires a spring force which is applied by a spring, not shown. In FIG. 2 is also the heald shaft 11 partially and schematically shown, which is attached to the rest 13 of the drive-side coupling element 2. Often screws serve this attachment.

Overall, it can be said that the (generic) heald clutches 1 in question produce a detachable connection between heald frames 11 and their drives, wherein the force of the drives is usually imparted to the coupling 1 via a shaft rod 10. It is customary in this case that the web-side coupling element 2 carries the male latching element 4, while the drive-side coupling element 3 takes over the female part. However, this role distribution could be reversed using the present invention.

FIG. 3 shows an exploded view of the webschaftseitigen coupling element 2. From this sketch it can be seen that the side plates 14 are attached to the aforementioned support 13. The large bore of these side plates 14 carries the linkage 6 of the aforementioned latching element 4. For this purpose, the attacks Axle pin 15, inter alia, through this hole. In the assembled state, the end of the axle pin 15 is moved by the nut 16. The pivoting of the latching element 4 is ensured by the sliding ring 17 and the bearing ring 18. As already mentioned in the introductory description, the two last-mentioned parts 17 and 18 and the components 15 and 16 of the axle do not belong to the latching element 4 and, for the purposes of the present document, they are not components thereof 4.

The latching element 4 decays in the explosion sketch ( FIG. 3 ) in the base member 20, the stop shoes 21 and the cap 22, which also in FIG. 4 is shown. In FIG. 4 is also to be seen that also in FIG. 5 shown cap 22 has latching elements 23 which can engage in the recesses 24 in the latch member 4 to fix the cap 22. The cap 22 and the stop shoes 21 (see also FIGS. 6 and 7 ) have a U-shaped profile that allows them to grip around parts of the latch member 4 and optionally clamp these parts. As far as the components are held only by snapping and / or by the restoring force of the U-shaped cross sections on the base member 20, they can also be replaced quickly. In addition or as an alternative, however, these components can also be glued, soldered, screwed or welded to the base component.

The stop shoes 21 can be pushed onto the stop edges 26 of the latching element 4. They are preferably made of soft materials such as brass. In general, it is advantageous if the basic component 20 of the latching element comprises both the clamping surface 5 and the bore 25 for receiving the articulation 6 (see also FIG FIG. 9 ).

FIG. 8 shows an exploded view of another embodiment of a webschaftseitigen coupling element 2, in which almost all components with the in ua

FIG. 3 shown embodiment are identical. However, the cap 22 has no latching elements 23 and there is no recess 24 provided for latching such elements, but the recess 27 is the weight savings.

The anchoring of the cap 22 (see also FIG. 10 ) on the base member 20 can therefore be made with gluing or welding. Such a cap 22 may be made of plastic and preferably produced by plastic injection molding.

Here also Teflon can be used. Caps 22 can also be made of sheet metal.

FIG. 11 shows the one-piece latching element 4 of a third embodiment of the invention in side view. This entry element 4 was manufactured in the sintering process. However, the concentration of the sintered material was changed zone by zone. In the area of the stop edge 26 of the latching element 4 a particularly large amount of brass was admixed. In the area of the edges of the bore 25, a lot of bronze was added. In the region of the zone at the tip of the latching element, lubricious materials such as bronze or carbon were added to the sintered material. In the area of the clamping surface 5 sintered components, which form carbide, such as tungsten carbide were added. The above-mentioned zones of the spatial extent of the latching element 4 were shown as thick lines. LIST OF REFERENCE NUMBERS 1 Webschaftkupplung 2 Webschaftseitiges coupling element 3 drive-side coupling element 4 latching 5 Clamping surface of the latching element 6 Linkage of the latching element 7 Base plate of the drive-side coupling element 8th Latch of the drive-side coupling element 9 Guide rod of the drive-side coupling element 10 Shaft rod of the drive-side coupling element 11 heald 12 Linkage of the locking lug of the drive-side coupling element 13 Edition of the webschaftseitigen coupling element 14 Side plates of the webschaftseitigen coupling element 15 axle pin 16 Mother of the axle pin 17 sliding ring 18 bearing ring 19 Zone at the top of the latch 20 Basic component of the latching element 21 Stop shoe of the latching element 22 Cap of the latching element 23 Rastelelement the cap of the latching element 24 Recess for engaging the Rastelelements 25 Bore for the articulation of the latching element 26 Stop edge of the latching element 27 Recess of the latching element (for weight reduction) z Direction of movement of the weave shaft x, y Other (orthogonal) spatial directions of a legal system

Claims (15)

Webschaftkupplung (1) for connecting a weaving shank (11) with a shaft drive, with the following features: a) the Webschaftkupplung (1) comprises two coupling elements (2,3), of which the first (2) with the weaving shank (11) and the second (3) is connectable to the shaft drive, b) the coupling elements (2, 3) can be brought into a releasable connection by a relative movement with respect to one another which runs essentially along the direction of movement (z) of the shaft, c) at least one of the two coupling elements (2, 3) has a latching element (4) which runs essentially along the direction of movement (z) of the heald (11), d) the latching element (4) has a clamping surface (5) which also extends in at least one of the two spatial directions (x, y) running transversely to the direction of movement (z) of the shaft, e) the other coupling element (2, 3) has at least one clamping element (8) for engaging the clamping surface (5), characterized in that f) the at least one latching element (4) is heterogeneous. Webschaftkupplung (1) according to the preceding claim
characterized in that
the at least one latching element (4) is integrally formed, but has zones that have different material compositions. Webschaftkupplung (1) according to the preceding claim
characterized in that
the at least one latching element (4) is composed of different components (21, 22). Webschaftkupplung (1) according to the preceding claim
characterized in that
the coupling elements (2,3) can be brought together by a rectilinear relative movement in a releasable connection. Webschaftkupplung (1) according to any one of the preceding claims
characterized in that
the at least one latching element (4) is hook-shaped. Webschaftkupplung (1) according to any one of the preceding claims
characterized,
that the clamping surface (5) of the at least one latching element (4) is part of a first component (2),
while the tip of the latching element, which protrudes in the direction of movement (z) of the shaft furthest in the direction of the other coupling element (3), contains components of a second component (22). Webschaftkupplung according to any one of the preceding claims
characterized in that
the latching element comprises the following components: a) components with recesses (24) for engaging detent elements (23), b) components with locking elements (23). Webschaftkupplung according to any one of the preceding claims
characterized in that
the latching element (4) has a base component (20) which has the clamping surface (5) and at least one receptacle (25) for the articulation (6) on at least one other component (14) of the coupling element (2) to which it is assigned; contains. Webschaftkupplung (1) according to the preceding claim
characterized in that
it is the articulation (6) is a pivotable linkage. Webschaftkupplung according to the preceding claim
characterized in that
the latching element (4) contains a bore (25) for receiving the linkage (6). Webschaftkupplung according to any one of the preceding claims
characterized in that
the latching element (4) has components (21, 22) with a preferably U-shaped profile which can be plugged or pushed onto other components (20) of the latching element. Webschaftkupplung (1) according to any one of the preceding claims
characterized in that
the latching element (4) has components (20, 21, 22) with the following properties: • different hardness • different coefficients of adhesion and / or sliding friction • different density Webschaftkupplung according to the two preceding claims
characterized in that The latching element (4) has at least one component (21, 22) with a preferably U-shaped profile, • which are plugged or pushed onto another component (20), • wherein the plugged-on component (21,22) made of a softer material than the other component, preferably a soft metal material such Brass, is made. Webschaftkupplung (1) according to the two preceding claims
characterized, • that the latching element (4) has a component (21, 22) which contains a material with a low coefficient of friction, preferably Teflon • and that the component (21,22) at least partially on top of clip (4), which is in the engaged state of the Webschaftkupplung (1) faces the coupling element (3), which does not have the latch member (4). Weaving shank (1) to which at least one coupling element (2) with the following features is attached: a) the at least one coupling element (2) is in a releasable connection to the second coupling element (3) by a relative movement to another coupling element (3) which extends substantially along the direction of movement (z) of the shank (11) in the weaving machine ), b) the at least one coupling element (2) has a latching element (4) extending substantially along the direction of movement (z) of the shaft (11), c) the latching element (4) has a clamping surface (5) which also extends in at least one of the two spatial directions (x, y) running transversely to the direction of movement (z) of the shaft, d) wherein the clamping surface (5) allows a clamping of the latching element (4) in the other coupling element (3) with a clamping element (8), characterized in that e) the at least one latching element (4) is heterogeneous.

Images