EP2730688A1 - Heald, preferably for processing strip material and method for producing the same - Google Patents

Abstract

The heddle (1) has strips (2,3) that form heddle shaft. End eyelets are formed on elements (6,7) in between which thread eye (8) is formed. Securing elements are provided for connecting and securing the elements and strips. The strips are connected at connecting points above and below the thread eye. The connecting points are formed at maximum distance from the thread eye, and the maximum distance is provided to be half as far as the distance between thread eye and respective end eyelet closest to connecting point. An independent claim is included for a method for production of heddle.

Description

Heald, preferably for processing strip material and method of making same.

The subject of the present invention is a heddle preferably for processing strip material and a method for producing the same.

Healds and their manufacturing methods are known. Traditionally, especially threads and wires are interwoven. Especially in recent times, bands are woven with healds. So that's what the EP 1 795 636 B1 with a heddle for tape-shaped warp threads. The heald shown there is optimized especially for the production of technical fabric, as used for example for the production of fiber composite materials.

The EP 1 795 636 B1 shows a strand consisting essentially of two bands, which are arranged parallel and at a distance from each other.

In the space between the bands are spacers and two rod-like components that form the thread eye. The spacers, but not the rod-like components that form the thread eye, have some of fasteners that each engage in a recess in one of the bands. At the two ends of the bands are end loops, so that in the EP 1 795 636 B1 shown heddle has four end eyelets. The aforementioned document makes no detailed information for the preparation of the healds shown.

The in the EP 1 795 636 B1 heald shown is optimized especially for the production of technical fabric, as used for example for the production of fiber composite materials use. When processing expensive materials such as CFRP threads, the price of the strands used plays a rather minor role.

However, other applications for strands for processing tapes could result, above all, in areas of technology which are under greater price pressure than the manufacturers of fiber composite components. One such area is the production of packaging means from tape-like plastic materials from which fabrics are formed. For the production of such packaging materials - such as sacks - above all circular looms are used.

The present invention is therefore based on the object to propose a heald, which can be produced inexpensively and which is equipped with a small width to come in demanding installation positions - as in Rundweben - used.

To achieve the above object, the present invention is a heald according to the aforementioned document EP 1 795 636 B1 and solves the problem with the features of claim 1. A preferred manufacturing method for such a heddle is proposed by the claim 14.

Among the other advantages of the proposed in claim 1 strand is that it has a high strength, even with a low material thickness of the strip material, which reduces the manufacturing cost. Also, the connection points can be produced inexpensively in the sections in which the two bands preferably abut each other with their flat sides. Cohesive bonding methods such as bonding, welding or soldering can be used advantageously here. Other methods, for example, bring about a form fit, such as riveting or stapling offer advantages here. Also conceivable, for example, connection points at which the bands penetrate each other or intersect and lock. The concrete form of the connection points is not limited to any of the mentioned connection methods to certain shapes, such as a round shape, but can take any form adapted to the requirements. Surprisingly, it has proved to be advantageous if the distances between the connection points, which are closest to the thread eye above and below it, and the thread eye itself, are low. By increasing proximity can be, inter alia, the stability of Increase strands. Thus, distances which are less than half, one-third, one-fourth, one-sixth, one-eighth or even one-tenth of the distance between thread eye and end eyelet are advantageous on the respective side of the thread eye. A distance from the thread eye to the end eyelet, which is at least 1.5 times the distance of the thread eye to the connection point, is advantageous.

In this connection, there are also advantages in that the two bands which are spaced apart from each other in the region where the thread eye is inserted into the strand usually have a force (normal force to the plane extending from the strand longitudinal direction and the width direction of the strand) two bands is clamped) exercise, which counteracts the spacing of the bands and with which the thread eye or the at least one component that limits the thread eye, can be clamped between the two bands. This clamping force is greater, the closer the two closest to the thread eye connection points. For the protection of the warp material, however, it is advantageous if the distance of the thread eye to the next connection point is greater than the width of the thread eye. In particular, this protects the side adjacent to the strand passing neighboring arches.

Additionally or alternatively, such a normal force can be generated by at least one of the bands (or both bands) being in a stressed state in its installed position. This is the case, for example, when the band in question is fully deflected or even elongated in the area between the two connection points which are closest to the thread eye. Then, among other things, the Hooke's law comes into play.

The at least one component engages with a fastening element in at least one of the bands. Often, such a component will engage at least with a fastener in each of the two bands. In an advantageous development, at least one component has fastening elements which engage in the two bands. Such a device may also have more than one fastener which engage in a band. The engagement of a fastener in a band can be designed such that in the band a recess is present that completely breaks the band. The recess may also break the tape only partially or be designed so that "recesses" are made in the band by inwardly projecting material deformations, for example, without tape material is taken away. In this or another way (here, for example, by punching) and fasteners on the band or two bands can be made, which engage in at least one component.

The device is preferably made of a ceramic material, but may also be e.g. be made as a sintered, MIM or injection molded part.

It is advantageous if a fastening element has a contact surface to at least one of the two bands, which serves as a stop and therefore stops the relative movement - here the approach - of tape and fastener at the anchor point.

For multiple fasteners, the contact surface between the fasteners may be. Then it may be advantageous to provide a free cut between the surfaces of the fastening elements and the contact surface in order to ensure the most accurate possible execution of the surfaces can.

It is also possible that there are a plurality of contact surfaces, in particular even if a plurality of fastening elements are provided, which are e.g. can be connected to each other across the free cuts.

There may be riser surfaces which may serve to properly position and retain the thread eye forming members by the normal force of the bands. For this purpose, the rising surfaces have a different angle from the right angle to the contact surface. This angle can be made dull or pointed. The contact surface can also be made only approximately flat or at least have an angle deviating from 90 ° to the center line of the device. The shape of the contact surface may be adapted to the bending line of the band to which it abuts. A formal adaptation to the bending of the bands may be advantageous for all surface areas of the end face.

It has proved to be advantageous to put the thread eye of at least two components that limit the thread eye. Often, the components will have the shape of a bridge. The rounding of at least the parts of the components which come into contact with the threads or band-like warp material is advantageous.

For a variety of reasons, it has proven to be advantageous if the region of the end eyelet remains free of connection points. In this way, the usually flexible tapes can be hung better. It is also advantageous if only one stranded strip is present in at least one region of the end eyelet, preferably in both end eyelet regions. If there are two bands in at least one end loop area, it is possible to make the end loops of the two bands different. Thus, for example, they can be congruently shaped and mirror-inverted or rotated by 180 ° about the tape longitudinal axis to each other. Also, different forms of the end eyelets of the two bands lend themselves to.

• Zusammenbringen zweier Bänder entlang ihrer Flachseiten unter Bildung von zumindest zwei Verbindungspunkten, die die Bänder zumindest in Abschnitten ihrer Fläche (Länge in Litzenerstreckungsrichtung) zusammenfügen,
• Bildung eines Abstandes zwischen den beiden Bändern in dem Teilbereich ihrer Erstreckung in Litzenlängsrichtung, der sich zwischen den zumindest zwei Verbindungspunkten befindet,
• Einbringen von zumindest einem Bauelement, das ein Fadenauge begrenzt, in den beabstandeten Bereich.

For the production of the healds described in this document, the following process features are advantageous:

• Bringing together two bands along their flat sides to form at least two connection points which join the bands at least in sections of their surface (length in the direction of strand extension),
• Forming a distance between the two bands in the portion of their extension in the longitudinal direction of the strand, which is located between the at least two connection points,
• Introducing at least one component which delimits a thread eye into the spaced area.

It is usually beneficial to insert indentations and recesses in the bands before they are brought together and / or joined. In particular, if the bands are designed congruent and / or if they contain recesses in the same places, but these can also be made if the bands already brought together or even already connected. In particular, the "punching through" of recesses is appropriate in this case. Possibly. even a punching through of more than two bands makes sense.

A spacing of the two bands in a partial region of their extension in the longitudinal direction of the strand between the at least two connection points can take place after the contacting and even after the formation of the connection points-for example by spot welding. For this purpose, a wedge in the portion of the two bands that are to be spaced, retracted. It is advantageous in this context if the two bands do not rest on each other in the relevant subarea. A gap between the two bands can be ensured by inserting a removable spacer into the spaced area prior to contacting the two bands. The spacer may be removable, but it may also remain as a permanent part of the strand in the spaced area. In this case, it may function as a structural member that limits the thread eye.

As spacers, however, embossing of one or both bands may also function if the embossment is raised relative to the rest of the band surface and faces the other band. In the cases mentioned, the spacer tool - as mentioned usually a wedge - retract into the gap and further widen it.

However, it is also conceivable to design the diameter of the "gap" so that it requires no further spacing by the wedge. In this case, the spacer thus determines the later distance of the two bands in the region of the thread eye. This distance is formed according to this reading of the above "method features" so when bringing together and not thereafter, so that the process characteristics for the latter embodiment do not necessarily follow each other as process steps. However, if you first bring the two bands together in order to then again with a spacing tool (possibly further) to space (see above, the first-mentioned embodiment of Manufacturing method), then follow the above process characteristics as process steps from each other.

In both cases, there is a spaced area (the two bands are spaced apart here) into which the thread eye is introduced in some way. This spaced area extends between the at least two connection points.

Further embodiments of the present invention will become apparent from the dependent claims and the description. The description is limited to essential features of the invention, wherein the individual features are generally used advantageously in all embodiments.

The figures are complementary to use.

The technical features of the individual embodiments can be used in the rule in connection with all embodiments of the invention advantageous.

Fig. 1

Figur 1 zeigt eine perspektivische Ansicht des Fadenaugenbereichs einer Weblitze.

Fig. 2

Figur 2 zeigt die in Figur 1 dargestellte Weblitze in einer Schnittdarstellung

Fig. 3

Figur 3 zeigt einen Endösenabschnitt, der aus zwei deckungsgleichen und gleich (händisch) geformten Bandendabschnitten geformt ist.

Fig. 4

Figur 4 zeigt einen Endösenbereich einer Weblitze, der aus zwei deckungsgleichen Bandendabschnitten besteht, die spiegelbildlich zueinander angeordnet sind.

Fig. 5

Figur 5 zeigt denselben Endösenbereich einer Weblitze wie Figur 4, der ebenfalls aus zwei deckungsgleichen Bandendabschnitten besteht, die spiegelbildlich zueinander angeordnet sind.

Fig. 6

Figur 6 zeigt einen Endösenabschnitt, der aus zwei deckungsgleichen und gleich geformten Bandendabschnitten geformt ist mit einer alternativen Endösenform.

Fig. 7

Figur 7 zeigt eine perspektivische Ansicht des Fadenaugenbereichs eines weiteren Ausführungsbeispiels einer Weblitze.

Fig. 8

Figur 8 zeigt eine perspektivische Gesamtansicht der Litze 1 aus Figur 1

Fig. 9

Figur 9 zeigt den Fadenaugenbereich, der in den Figuren 1, 2 und 8 gezeigten Weblitze in perspektivischer Ansicht.

Fig. 10

Figur 10 zeigt das Band 3 aus Figur 1.

Fig. 11

Figur 11 zeigt ein Bauteil 7 aus Figur 1.

Fig. 12

Figur 12 zeigt ein Bauteil 7 aus Figur 1 in einer Schnittdarstellung.

Fig. 13

Figur 13 zeigt eine alternative Ausführung des Bauteils 6 in einer Schnittdarstellung.

Fig. 14

Figur 14 zeigt einen Schnitt eines Teilbereichs einer weiteren Ausführungsform der Erfindung,

Hereinafter, some selected embodiments of the invention will be explained with reference to the figures.

Fig. 1

FIG. 1 shows a perspective view of the thread eye portion of a heald.

Fig. 2

FIG. 2 shows the in FIG. 1 illustrated heald in a sectional view

Fig. 3

FIG. 3 shows an end loop portion which is formed from two congruent and equal (manually) shaped Bandendabschnitten.

Fig. 4

FIG. 4 shows an Endösenbereich a heald consisting of two congruent Bandendabschnitten which are arranged in mirror image to each other.

Fig. 5

FIG. 5 shows the same Endösenbereich a heald as FIG. 4 , which also consists of two congruent Bandendabschnitten, which are arranged in mirror image to each other.

Fig. 6

FIG. 6 shows an end loop portion which is formed from two congruent and identically shaped Bandendabschnitten with a alternative end eyelet shape.

Fig. 7

FIG. 7 shows a perspective view of the thread eye portion of another embodiment of a heald.

Fig. 8

FIG. 8 shows an overall perspective view of the strand 1 from FIG. 1

Fig. 9

FIG. 9 shows the thread eye area, which in the FIGS. 1 . 2 and 8th shown heald in perspective view.

Fig. 10

FIG. 10 shows the band 3 FIG. 1 ,

Fig. 11

FIG. 11 shows a component 7 FIG. 1 ,

Fig. 12

FIG. 12 shows a component 7 FIG. 1 in a sectional view.

Fig. 13

FIG. 13 shows an alternative embodiment of the component 6 in a sectional view.

Fig. 14

FIG. 14 shows a section of a portion of a further embodiment of the invention,

The FIGS. 1 and 2 show the spaced portion 4 of an embodiment of a heald according to the invention 1, which is composed of the two bands 2 and 3. The two bands 2, 3 have been provided in the present embodiment, prior to their combination with embossing points 5, which have acted as spacers in the manufacture of the heald 1.

Between the two bands 2 and 3 are two components 6, 7, which limit the thread eye 8 held. In the embodiment shown, the two components 6, 7 have fastening elements 9, 10, which engage in recesses 11, 12 in the two bands 2, 3. In the embodiment shown, the recesses 11, 12 are holes that pass through the bands. However, there are blind holes, the z. B. can come about as imprints or indentations, conceivable.

Also the FIGS. 8, 9 and FIGS. 11, 12 and 13 show an overall view or elements of heald 1 according to FIGS FIGS. 1 and 2 , Based on FIGS. 8 and 9 becomes clear that the two bands 2 and 3 through the two connection points 13 and. 14 are held together. It is also conceivable to connect the two bands by three, four, five or more connection points 13, 14, or to give the connection points a greater extension in the strand longitudinal direction I. In the region of the end eyelets 15 and 16 there are no connection points 13, since these - as already mentioned above - are advantageously positioned in the vicinity of the thread eye 8. Out FIG. 8 also the distances D, A, and B mentioned in the description emerge. D reaches here from the middle of the thread eye 8 to the end of the inner edge of the end eye in the longitudinal direction of the strand I, with which the strand hangs on the mounting rail. A extends from the center of the thread eye 8 in the strand longitudinal direction I to the beginning of the attachment point 13 on the thread eye 8 facing side of the attachment point thirteenth FIG. 8 also shows that the heald is equipped with J-shaped end eyelets. It is possible in this and in all other embodiments of the invention, C-shaped end eyelets instead of the J-shaped end eyelets. The end eyelets 17 of the two bands 2 and 3 are the same shape and aligned in each end eyelet region 15, 16 the same. The FIG. 3 shows a frontal view of the upper Endösenbereich 15 of in FIG. 8 shown heald 1, in which only the front end eye 17 can be seen in the view. The FIGS. 4 and 5 show an end eyelet region 15 in which the end eyelets 17 are shaped the same as in FIG FIG. 3 , However, the orientation of the end eyelets 17 of the two bands 2 and 3 is different: The two end eyelets 17 are rotated along the tape longitudinal axis against each other.

Based on FIGS. 10 to 12 is again the exact function of the recesses 11, 12 and the fasteners 9 and 10 of the embodiment according to the FIGS. 1 and 2 clear. That in the FIGS. 11 and 12 shown component 7 has in each of its end faces 18, two fastening elements 9 and 10 which reach into the recesses 11 and 12 of the bands 2, 3. The fastening elements 9 and 10 are raised relative to the contact surface 19. The contact surface limits the movement of the component 7 to the respective band 2, 3 and thus acts as a stop. Between the contact surface 19 and the upper riser surface 21, a right angle α. From the lower rising surface 22 and the contact surface 19, a (obtuse) angle β is set, which deviates from the right angle. Between the rising surfaces 21 and 22 free cuts 20 are introduced into the component 7.

The design of the fastening elements shown in the aforementioned three figures is particularly advantageous. It should be noted that the surface areas of the end face are not parallel to the in FIG. 12 shown center line 27 of the device 7 are. The angle W1 spanned between the end face of the saturation member 9 and the center line 27 has the smallest deviation from 90 ° toward smaller values. The angles W2 and W3 are further deviated from 90 °, since the component is adapted to the bending line of the band. In this case, the angle W3 is spanned by the end face of the fastening element 10 and the center line 27. The angle W3 extends between the center line 27 and the contact surface 19. In FIG. 7 the area of the thread eye 8 of another heald 1 according to the invention is shown, which illustrates that the recesses 11, 12 and fastening elements 9, 10 can also be designed in another way. In this embodiment, the fastening elements 9, 10 are connected by a web 23 with each other. Accordingly, the recesses 11, 12 are connected by a groove.

In FIG. 13 a modification of the device 7 is shown. The right in the figure, contact surface 19 is here as in section (the drawing plane is here spanned by the Litzenlängsrichtung I and the spatial direction c of the width C of the thread eye 8) arcuate surface without a straight area running.

FIG. 14 shows a section of a portion of another embodiment of the invention, in which the fastening element 25 is part of the band 3. The Befestigungslement engages in a recess 26 of the device 7, which limits a thread eye 8, a. It is advantageous in all embodiments of the invention if there are a plurality of such fastening elements 25. These can also engage in one or more components 6, 7 from both bands 2, 3. LIST OF REFERENCE NUMBERS 1 heald 2 Band, left 3 Band, right 4 spaced area 5 embossing point 6 Component that limits the thread eye up 7 Component that limits the thread eye, below 8th thread eye 9 Fastener, semicircular 10 Fastener, rectangular 11 Recess, semicircular 12 Recess, rectangular 13 Connection point, above 14 Connection point, below 15 End eyelet, above 16 End eyelet area, below 17 End eyelet, J-shaped 18 End face of the component 7 19 contact area 20 Clear cut 21 Rise area, above 22 Rise area, below 23 web 24 heald rod 25 Fastener on the band 3 26 Recess in the component 7 27 Center line of the component 7 α right angle β dull angle A Distance connecting point 13, 14 - thread eye 8 B Endless area that is free of connection points C Width of the thread eye D Distance thread eye 8 - End eyelet 17 W1 Angle between center line and end face W2 Angle between center line and contact surface W3 Angle between center line and end face l Spatial direction in strand longitudinal direction b Direction of space in the width direction of the bands c Direction of space in the direction of the width C of the thread eye. 8

Claims (15)

Heald (1) preferably for processing strip-like warp material, comprising: at least two bands (2, 3) forming the strand shank (24), - At least one component (6, 7) which limits a thread eye (8) at least two end eyelets (17) characterized, in that the at least one component (6, 7) has at least one fastening element (9, 10) which engages (9, 10) in a recess (11, 12) in the first of the two bands, and / or that at least one of the two strips (2, 3) has at least one fastening element (25) which engages in at least one component (6, 7), - That the two bands (2,3), which form the Litzenschaft (24), above and below the Fadenauges (8) at least in sections at connection points (13, 14) abut each other, - And that at least the first connection point (13) above the thread eye or at least the first connection point (14) below the thread eye (8) has a distance (A) from the thread eye (8), which is less than half of the distance (D ) between the thread eye (8) and the connection point (13, 14) respectively proximal end eyelet (17). Heald according to the preceding claim
characterized in that
the distance (A) at least the first connection point (13) above the thread eye (8) or at least the first connection point (14) below the thread eye (8) of the thread eye (8), is less than a third, but preferably less than a sixth of the distance (D) between the thread eye (8) and the connecting point (13, 14) respectively proximal end eyelet (17). Heald heald according to one of the two preceding claims
characterized in that
the distance (A), the two first connecting points (13, 14) to the thread eye (8), is less than half, but preferably less than one third of the distance (D) between the thread eye (8) and the respective connection point (13, 14) nearest end eyelet (17). Heald according to one of the preceding claims
characterized in that
the at least one component (6, 7) which delimits the thread eye (8) is held inter alia by a normal force to the strand longitudinal direction (L) between the two strips (2, 3). Heald according to the preceding claim
characterized in that
At least one of the two bands (2, 3) in its installed position in the heald (1) is in a mechanically strained state in the region between the two first connection points (13, 14). Heald according to one of the preceding claims
characterized in that
the at least one component (6, 7) which delimits the thread eye (8) engages with a fastening element (9, 10) in at least one of the two bands (2, 3) and moreover at least one contact surface (19) to the at least a band, which is a movement of the at least one Device (6, 7) in the direction of the at least one band (2,3) in the installed position of the at least one component (6, 7) is opposite. Heald according to one of the preceding claims
marked by
at least two components (6, 7) which delimit the thread eye (8) and which each have at least one fastening element (9, 10) which engages (9, 10) in at least one of the two bands (2, 3). Heald heald according to one of the two preceding claims
characterized,
in that the at least one component (6, 7) delimiting the thread eye (8) engages with at least two fastening elements (9, 10) in at least one of the two bands (2, 3)
and that the at least one contact surface (19) to the at least one band (2, 3), the movement of the at least one component (6, 7) in the direction of the at least one band (2, 3) in the installed position of the at least one Device (6, 7) opposes, between these two fastening elements (9, 10) is pronounced. Heald according to the preceding claim
characterized,
in that the at least one contact surface (19) runs substantially parallel to the surface of the one band (2, 3) to which it has contact (19),
that the two fastening elements (9, 10) relative to the at least one contact surface (19) are raised,
in that at least one fastening element (9, 10) increases along a rise surface with respect to the at least one contact surface (19) and that the contact surface (19) and the rise surface (22) of the at least one fastening element (9, 10) enclose an angle (β). which deviates from the right angle. Heald according to the preceding claim
characterized,
in that the rising surface (22) of the at least one fastening element (10) is located on the side of the fastening element (10) facing the thread eye (8). Heald according to one of the preceding claims
characterized in that
at least the region (15, 16) of an end eye (17) is free of connection points (13, 14). Heald according to the preceding claim
characterized in that
at least one region (15, 16) of an end eye (17) which is free of connection points (13, 14) has a length (B) which is at least a quarter of the distance between the thread eye (8) and the respective end eye (8). 17) corresponds. Heald according to one of the preceding claims
characterized,
that at least both bands (2, 3) extend into the region of an end eye (17)
and that the two bands (2, 3) in the region of the end eyelet are not congruent - preferably mirror-inverted - aligned or even differently shaped. Method for producing a heald with at least the following method features: - bringing together two strips (2, 3) along their flat sides to form at least two connecting points (13, 14) which join the strips (2, 3) at least in sections of their surface, - Forming a distance between the two bands in the portion of their extension in the longitudinal direction of the strand (L), which is located between the at least two connection points (13, 14), - Introducing at least one component (6, 7) which limits a thread eye (8) in the spaced area (4). Process according to the preceding claim
characterized in that
the method feature of bringing together the two bands (2, 3), the introduction of indentations, embossments (5) and / or recesses (11, 12) precedes.

Images