EP2584078B1 - Heald with yarn-friendly yarn eyelet - Google Patents
Heald with yarn-friendly yarn eyelet Download PDFInfo
- Publication number
- EP2584078B1 EP2584078B1 EP11186129.0A EP11186129A EP2584078B1 EP 2584078 B1 EP2584078 B1 EP 2584078B1 EP 11186129 A EP11186129 A EP 11186129A EP 2584078 B1 EP2584078 B1 EP 2584078B1
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- EP
- European Patent Office
- Prior art keywords
- thread
- heald
- warp
- warp thread
- longitudinal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000007704 transition Effects 0.000 claims description 28
- 239000013598 vector Substances 0.000 claims description 12
- 230000001154 acute effect Effects 0.000 claims description 4
- 239000008186 active pharmaceutical agent Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000009941 weaving Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Images
Classifications
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
- D03C9/00—Healds; Heald frames
- D03C9/02—Healds
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
- D03C9/00—Healds; Heald frames
- D03C9/02—Healds
- D03C9/024—Eyelets
Definitions
- the invention relates to a heddle for a weaving shank of a loom.
- Healds are equipped with a large number of strands, each strand has a thread eye through which a warp thread is passed in the position of use of the heald.
- the healds are moved up and down during operation of the loom to form a shed. In the shed, the weft is entered.
- the warp threads and healds are exposed to great loads. However, high accelerations or delays of the healds must not lead to excessive wear or damage to the warp thread and heald.
- US 5,348,055 A describes a heald, which is made of a band-shaped metal part.
- the thread eye is formed by punching an opening in the metal strip. This results in two thread eye limiting and extending in the longitudinal direction of the heddle body webs.
- the webs are bent out of the plane of the metal strip and thus have a distance from each other transversely to the warp direction and transverse to the longitudinal direction. In such a strand edges are formed in the region of the thread eye, which can lead to heavy wear of the warp thread.
- Out DE 43 36 362 C2 goes out a similar heald.
- EP 1 739 215 B1 describes a heddle made of plastic.
- the two the thread eye in the thread longitudinal direction delimiting the thread support surfaces are flat and can be rounded in the outer surfaces of the strand body.
- the distance between the two webs in warp direction and transverse thereto defines the size of the approximately rectangular contoured thread support surfaces.
- the heald is thereby relatively thick in the area of the thread eye.
- Another plastic heald describes EP 2 224 046 B1 ,
- the two thread eye in the longitudinal direction of the strand body limiting thread support surfaces are web-like thin and about as thick as the two thread eye limiting ridges.
- the contact surface for the warp thread is very small.
- Another heddle made of plastic is made CN 2 723 472 Y known. Between the two thread eye limiting and extending in the longitudinal direction of the heddle body webs a curved extending thread support surface is provided.
- the heddle has a heddle body which extends in the longitudinal direction between the two end loops.
- a thread eye for receiving a warp thread is present in the strand body.
- the warp thread passes through the thread eye in a warp direction.
- the direction of extension of the warp thread in the thread eye is to be understood when looking in the longitudinal direction of the warp thread or the associated thread support surface.
- the warp thread is deflected by the heddle in the thread longitudinal direction. Viewed along the entire length of the warp thread, this runs essentially in a warp thread plane which is spanned by the longitudinal direction of the heddle body and the warp thread direction.
- the thread eye is delimited by two longitudinally spaced apart thread support surfaces of the strand body.
- Each thread support surface extends between a first longitudinal side and a second longitudinal side of the heddle body.
- the two longitudinal sides are preferably designed to be stepless and / or edgeless at least following the thread eye.
- Each thread support surface has a first planar surface portion and a second planar surface portion.
- the two surface sections are steplessly and without edges connected to one another via a central curvature section. The two surface sections are thus connected to each other thread-saving by the curvature section. Due to the two surface sections, the inclination of the warp thread on the warp thread entry side or the warp thread exit side of the thread eye can be predetermined by a corresponding inclination of the respective surface section.
- the profile of the thread support surface seen in the warp direction can be adapted to the open shed position of the heald, when the warp thread rests on the respective thread support surface.
- the bearing surface between warp and heald is large, which reduces the local load of the warp. Both the warp of the warp and the weaving of the heald are reduced.
- the curvature of the central curvature section in the warp direction is constant.
- the contour of the curvature section thus follows in the warp direction a constant radius and forms, so to speak, a lateral surface portion of a circular cylinder.
- the curvature ensures that the load of the warp thread in the thread eye is not too large.
- each yarn guide surface is oriented such that its normal vector points in a transverse direction transverse to the warp direction and transversely to the longitudinal direction.
- the thread guide surface thus extends in a plane which is spanned by the warp direction and the longitudinal direction.
- the oriented in warp direction thread guide surfaces serve to thread-gentle guidance of the guided through the thread eye warp thread.
- the longitudinal distance between the two webs measured in the warp direction is at least five times greater than the transverse distance between the two webs in the transverse direction at right angles to the warp direction and measured at right angles to the longitudinal direction.
- the thread support surface located in the area between the webs provides the warp thread in its longitudinal extent a sufficiently large contact surface in order to further reduce local loads on the warp thread.
- the width of the heald on the thread eye can be a maximum of 20% greater than the sum of the thickness of the two webs in the transverse direction at right angles to the warp direction and measured at right angles to the longitudinal direction. As a result, the heald is relatively thin in the transverse direction, whereby the number of healds on the heald can be very large.
- each thread support surface has a first transition section curved in the warp direction between the first longitudinal side of the strand body and the first surface section and / or a second transition section curved in the warp direction between the second longitudinal side of the strand body and the second surface section.
- the curvature of the two transition sections can be of different sizes.
- the curvature of the first and / or the second transition section is constant in the warp direction.
- the first and / or the second transition section pass continuously and without edges into the adjacent flat surface section of the thread support surface and into the adjacent longitudinal side.
- the end of the first side surface adjacent to the first transition portion and / or the end of the second side surface adjacent to the second transition portion preferably includes an acute angle with the warp direction.
- the two ends of the first and second side surfaces extend in particular at the same distance parallel to each other obliquely to the warp direction.
- the adjoining the transition portion end of the respective side surface connects the two webs of the strand body.
- the first side surface and / or the second side surface seen in the longitudinal direction at least in the area adjacent to the thread eye is rotated about an axis parallel to the longitudinal direction, so that the normal vector of the first side surface and / or the second side surface following the respective Thread support surface with the warp direction an acute Includes angle.
- the heald body is rotated in the region of its thread eye in this embodiment about an axis extending parallel to the longitudinal axis, whereby a passage region for the warp thread is formed between the two webs.
- the inclination of the first surface section in the warp direction is adapted to a warp thread entry angle and / or the inclination of the second surface section in the warp direction to a warp thread exit angle in the open position of the associated web.
- the warp thread entry angle is the angle at which the warp thread guided by the thread eye extends in relation to a reference plane extending at right angles to the longitudinal direction towards the heald.
- the warp thread emergence angle is the angle of the warp thread opposite the reference plane under which the warp thread runs from the heald to the selvedge.
- the local load of the warp thread and thus also the local load of the thread support surface of the heald is very low, which minimizes wear.
- the warp thread entry angle and the warp thread exit angle are generally different in size.
- Each web may have on its side opposite the yarn guide surface a flat outer surface, which is preferably aligned parallel to the yarn guide surface.
- the flat outer surfaces may therefore extend parallel to the warp direction, whereby warp threads guided between two adjacent healds of a heddle may slide along the outer surface.
- the heddle body has at its two ends in the longitudinal direction in each case an end eye region, in each of which an end eye of the heddle for attachment a Litzentragschiene is arranged. At least outside these Endösen Schemee the two side surfaces of the Litzen stresses are in a preferred embodiment infinitely and edged designed. This ensures that the heddles can glide along warp threads passing by without tangling with these warp threads.
- the heddle is preferably made of plastic and / or a composite material based on plastic, in particular by a casting method, for example injection molding.
- the heald can be manufactured in one piece seamlessly and seamlessly from a uniform material.
- the thread eye is bounded directly by the strand body. Thread eye inserts, such as a Maillon can be omitted.
- the invention relates to a heald 10, as schematized in FIG. 1 is illustrated.
- the heddle 10 is in the embodiment of a heddle body 11, which is made of plastic or a composite material based on plastic, for example by a casting method such as injection molding.
- the heddle body 11 extends in a longitudinal direction L and has at its two longitudinal ends in each case an end eye region 12 with an end eye 13.
- the end loops 13 are used to attach the heald 10 to a respective associated Litzentragschiene a heald 14.
- the heddle body 11 has a thread eye 15 approximately centrally between the two end loops 13. Through the thread eye 15 10 a warp thread 16 is passed in the use position of the heald.
- the warp thread 16 extends in the longitudinal direction L in a warp direction F through the thread eye 15 of the heald 10.
- the healds 14 are moved to form a shed in a vertical direction, which corresponds in the position of use of the healds 10 of the longitudinal direction L of the heddle body 11.
- the guided through the thread eyes 15 of the heddles 10 warp threads 16 are thereby deflected out of a horizontal plane up or down.
- the warp threads 16 run starting from a coating tree 19 or starting from part bars to the respective associated heald 10 and enter the thread eye 15 of the heald 10 on the warp thread entry side 20.
- the warp threads 16 run on the warp thread entry side 20 with respect to a horizontal plane at a warp thread entry angle ⁇ inclined towards the thread eye 15.
- the warp thread 16 exits the thread eye 15 with respect to a horizontal plane at a warp thread emergence angle ⁇ and runs to a fabric edge 22 out.
- the warp thread entry angle ⁇ and the Kettfadenaustrittswinkel ⁇ depending on whether the weaving shank 14 is in the upper shed or in the lower compartment be different in size and assume, for example in the upper shed first values ⁇ 1, ⁇ 1 and in the lower shed second values ⁇ 2, ⁇ 2.
- warp thread entry angle ⁇ and the warp thread emergence angle ⁇ also depend on the position of the heald between the fabric edge 22 and the coating beam 19, as indicated by the dashed heald 14 in FIG. 3 is illustrated.
- the warp thread entry angle ⁇ are smaller than the Kettfadenaustrittswinkel ⁇ , since the distance of the heald frames 14 to the coating tree 19 is greater than the distance between the heddle shafts 14 to the fabric edge 22nd
- the stranded body 11 has at least outside its two end eyelet regions 12 a completely edgeless and stepless outer surface. This ensures that between two adjacent healds 10 passed through warp 16 of another heald 14 thread-saving on the heald 10 can slide along without hanging. The risk of excessive wear of the warp threads 16 or a thread breakage is thereby reduced.
- lines drawn on the strand body 11 are merely illustrative of the contour of the strand body 11 and do not represent any edges.
- the thread eye 15 has a special shape. In the longitudinal direction L, the thread eye 15 is bounded by two opposing thread support surfaces 25. The heald 10 supporting heald 14 is located in the upper compartment or in the Lower part, is guided by the thread eye 15 warp 16 on one of the two thread support surfaces 25.
- the thread eye 15 is bounded by two webs 26 arranged at a distance from one another.
- Each web 26 has on its the warp 16, which is performed by the thread eye 15, associated side a flat yarn guide surface 27.
- the thread guide surface 27 of a web 26 extends in a plane which is spanned by the warp direction F and the longitudinal direction L.
- the yarn guide surface 27 of a web 26 connects the two yarn support surfaces 25 of the heald body 11. This creates a yarn eye 15 circumscribed by the two yarn guide surfaces 25 and the two yarn guide surfaces 27 on the webs 26.
- Each web 26 has on its thread guide surface 27 opposite from the thread eye 15 side facing away from a flat outer surface 28.
- the outer surface 28 is parallel to the yarn guide surface 27.
- the thickness d of a web 26 in the transverse direction Q is measured between the yarn guide surface 27 and the outer surface 28 and is for example between 0.4 and 0.5 millimeters.
- the outer surfaces 28 of the webs 26 are part of the outer surface of the heddle body 11 and not limited by steps or edges.
- the two approximately in the warp direction F facing longitudinal edges 29 of each web 26 connect the yarn guide surface 27 and the outer surface 28. They are curved or curved, so that the yarn guide surface 27 and the outer surface 28 over the two longitudinal edges 29 of the web 26 stepless and edged together.
- the two in the warp direction F facing each other longitudinal edges 29 of two webs 26 of a strand body 11 in the embodiment have a constant radius, as in FIG. 5 can be seen.
- the longitudinal edges 29 of the two webs 26 oriented away from the thread eye 15 can have a plurality of radii and / or flattened sections.
- a longitudinal distance DL is present, which corresponds to the clear width between the two webs 26 in warp direction F.
- a transverse distance DQ is measured between the two webs 26 and according to example between the two flat yarn guide surfaces 27, which corresponds to the clear width between the two webs 26 in the transverse direction Q.
- the longitudinal distance DL is at least 5 times and in particular 5 to 7 times greater than the transverse distance DQ.
- the transverse distance DQ can be, for example, 0.15 to 0.2 mm.
- the longitudinal distance DL can be, for example, 1 mm to 1.5 mm.
- the width B of the heddle body 11 in the region of the thread eye 15 is described by the distance of the outer surfaces 28 of the webs 26 measured in the transverse direction Q.
- the width B can be 1.0 to 1.5 mm.
- the width B of the stranded body 11 at the thread eye 15 can be, for example, at most 10% greater than the sum of the thickness d of the two webs 26.
- the thread support surface 25 is divided into several areas. The different areas are in the FIGS. 7 and 8 illustrated.
- Each thread support surface 25 extends between a first side surface 33 and a second side surface 34 of the heddle body 11.
- the two side surfaces 33, 34 are arranged on flat sides of the heddle body 11 remote from each other and merge stepwise and without edges at longitudinal edges 35 of the heddle body 11 above.
- the two side surfaces 33, 34 are always aligned parallel to each other.
- the normal vector NA of the first side surface 33 and the normal vector NA of the second side surface 34 follow a respective end eyelet region 12 in the transverse direction Q.
- the two side surfaces 33, 34 With respect to a longitudinal center plane M of the heddle body 13, the right angles to the transverse direction Q, rotated, so that the normal vector NA of the two side surfaces 33, 34, following the thread eye 15, is oblique to the transverse direction Q and oblique to the warp direction F.
- the normal vector NA includes with the transverse direction Q a rotation angle ⁇ , which may be 15 to 20 degrees, for example.
- the two webs 26 are thus offset relative to the longitudinal center plane M of the heddle body 11 arranged on different sides, whereby the transverse distance DQ between the two webs 26 is formed.
- the end 33a of the first side surface 33 adjoining the thread support surface 25 or the end 34a of the second side surface 34 extending to the thread support surface 25 extends at the angle of rotation ⁇ with respect to the warp direction F and thus obliquely to the warp direction F and also obliquely to the transverse direction Q.
- the distance DS between the two side surfaces 33, 34 of the heddle body 11 adjacent to the thread eye 15 in the direction of the normal vectors NA of the two side surfaces 33, 34 is greater than the thickness d of a web 26. In the embodiment, this distance DS corresponds to the two side surfaces 33, 34 in approximately the diagonal dimension of a web 26. The distance DS between the two Side surfaces 33, 34 is smaller than the longitudinal distance DL between the two webs 26th
- the thread support surface 25 Between the end 33a of the first side surface 33 and the end 34a of the second side surface 34 extends the thread support surface 25.
- This has a first transition portion 40 adjacent to the first side surface 33 and a second transition portion 41 adjacent to the second side surface 34.
- the two transition sections 40, 41 are curved. In the warp direction F, the curvature of the transition sections 40, 41 is constant, for example.
- the heddle body 11 is cut in the region of the thread support surface 25 in a plane which runs parallel to the longitudinal center plane M of the heddle body 11.
- the sectional plane is thus spanned by the warp direction F and the longitudinal direction L.
- the sectional plane extends obliquely to the first side surface 33 and the second side surface 34 following the thread support surface 25.
- the two transition sections 40, 41 a curved, for example circular arc-shaped contour, wherein the circular arc of the first transition section 40 has a first radius r1 and the arc of the second transition portion 41 has a second radius r2.
- the two radii r1, r2 can be different sizes or the same size.
- the described contour of the transition sections 40, 41 is limited to a thread guide area A of the thread eye 15.
- the thread guide region A is to be understood as the region of the thread eye 15 in which the warp thread 16 can move between the webs 26 in the transverse direction Q.
- the yarn guide area A is limited, for example, by the two planes which are defined by the two yarn guide surfaces 27 of the webs 26 ( FIG. 7 ).
- the form of the thread support surface 25 described above and below and its sections is limited in the preferred embodiment to the thread guide area A. Outside this thread guide region A, the thread support surface 25 has a planar and / or convex shape, which in particular is stepless and edgeless and which can deviate from the defined shape in the thread guide region A. Within and outside this thread guide area A concave depressions on the thread support surface 25 are avoided.
- the curvature of at least one of the two transition sections 40, 41 in the warp direction F can not be constant.
- the thread support surface 25 also has a first planar surface portion 42 and a second planar surface portion 43.
- the two surface sections 42, 43 extend in different planes.
- the first surface section 42 extends inclined with respect to a perpendicular to the longitudinal direction L extending reference plane E by a first inclination angle ⁇ 1.
- the first inclination angle ⁇ 1 is constant in the warp direction F.
- the second surface portion 43 is inclined relative to the reference plane E by a second inclination angle ⁇ 2.
- the second inclination angle ⁇ 2 is constant in the warp direction F.
- the first inclination angle ⁇ 1 corresponds to the warp thread entry angle ⁇ and the second inclination angle ⁇ 2 corresponds to the warp thread exit angle ⁇ .
- the warp thread 16 extends tangentially in the direction of the relevant planar surface section 42 or 43, so that it surrounds the transition regions 40, 41. 41 overlaps only with the flat surface portions 42, 43 come into contact.
- a central curvature portion 44 is present, which connects the two flat surface portions 42, 43 steplessly and without edges.
- the curvature section 44 has a constant curvature in the exemplary embodiment.
- the contour of the curvature section 44 is thus formed by a circular arc with a third radius r3.
- the center of the circular arc of the curvature portion 44 is in the embodiment outside a median plane X between the first side surface 33 and the second side surface 34th
- the contour of the thread support surface 25 is therefore asymmetrical with respect to the median plane X between the two side surfaces 33,34. In a modified embodiment, however, the contour can be configured symmetrically with respect to this center plane X.
- the thread support surface 25 is designed to be a total of stepped and edged. Viewed in warp direction F, it has a constant slope or a constant curvature in sections, with tangential transitions being created in each case.
- the contour profile of the thread support surface is defined according to the invention defined in the warp direction F and thus obliquely to the normal vectors NA of the adjoining the thread support surface 25 side surfaces 33, 34 of the heddle body eleventh
- the described curvature or inclination of the thread support surface 25 and its sections 40, 41, 42, 43, 44 is, as mentioned, provided at least in the thread guide region A and may deviate from the thread guide portion A thereof.
- the invention relates to a heald 10 for a heald 14.
- the heald 10 has a heald body 11, which is preferably made of plastic by injection molding.
- a thread eye 15 of the heald 10 serves to pass a warp thread 16 in a warp direction F.
- the thread eye 15 is bounded by two opposing thread support surfaces 25.
- the two thread support surfaces 25 are designed identically.
- Each thread support surface 25 has a first planar surface section 42 and a second planar surface section 43. Seen in the warp direction F, the inclination ⁇ of the two surface sections 42, 43 is constant in each case and preferably of different sizes.
- the inclination ⁇ is measured with respect to a reference plane E, which is horizontally oriented in the operating position of the heald 10.
- the two surface portions 42, 43 are continuously and without edges connected by an intermediate central curvature portion 44, which has viewed from the thread support surface 25 has a convex shape.
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Description
Die Erfindung betrifft eine Weblitze für einen Webschaft einer Webmaschine. Webschäfte werden mit einer großen Anzahl von Litzen bestückt, wobei jede Litze ein Fadenauge aufweist, durch das in Gebrauchslage der Weblitze jeweils ein Kettfaden hindurchgeführt ist. Die Webschäfte werden im Betrieb der Webmaschine auf und ab bewegt, um ein Webfach zu bilden. In das Webfach wird der Schussfaden eingetragen. Die Kettfäden sowie die Weblitzen sind dabei großen Belastungen ausgesetzt. Hohe Beschleunigungen bzw. Verzögerungen der Weblitzen dürfen aber nicht zu übermäßigem Verschleiß oder einer Beschädigung am Kettfaden sowie der Weblitze führen.The invention relates to a heddle for a weaving shank of a loom. Healds are equipped with a large number of strands, each strand has a thread eye through which a warp thread is passed in the position of use of the heald. The healds are moved up and down during operation of the loom to form a shed. In the shed, the weft is entered. The warp threads and healds are exposed to great loads. However, high accelerations or delays of the healds must not lead to excessive wear or damage to the warp thread and heald.
Eine andere Kunststoff-Weblitze beschreibt
Eine weitere Weblitze aus Kunststoff ist aus
Ausgehend von diesem bekannten Stand der Technik kann es als eine Aufgabe der vorliegenden Erfindung angesehen werden eine Weblitze zu schaffen, die den Verschleiß des Kettfadens reduziert.Starting from this known state of the art, it can be regarded as an object of the present invention to provide a heald which reduces the wear of the warp thread.
Diese Aufgabe wird durch eine Weblitze mit den Merkmalen des Patentanspruches 1 gelöst.This object is achieved by a heddle with the features of claim 1.
Erfindungsgemäß weist die Weblitze einen Litzenkörper auf, der sich zwischen den beiden Endösen in Längsrichtung erstreckt. Im Litzenkörper ist ein Fadenauge zur Aufnahme eines Kettfadens vorhanden. Der Kettfaden durchsetzt das Fadenauge in einer Kettfadenrichtung. Unter der Kettfadenrichtung ist die Erstreckungsrichtung des Kettfadens im Fadenauge zu verstehen, wenn man in Längsrichtung auf den Kettfaden bzw. die zugeordnete Fadenauflagefläche blickt. Der Kettfaden wird durch die Weblitze in Fadenlängsrichtung ausgelenkt. In der gesamten Länge des Kettfadens betrachtet verläuft dieser im Wesentlichen in einer Kettfadenebene, die durch die Längsrichtung des Litzenkörpers und die Kettfadenrichtung aufgespannt wird.According to the invention, the heddle has a heddle body which extends in the longitudinal direction between the two end loops. In the strand body, a thread eye for receiving a warp thread is present. The warp thread passes through the thread eye in a warp direction. Under the Kettfadenrichtung the direction of extension of the warp thread in the thread eye is to be understood when looking in the longitudinal direction of the warp thread or the associated thread support surface. The warp thread is deflected by the heddle in the thread longitudinal direction. Viewed along the entire length of the warp thread, this runs essentially in a warp thread plane which is spanned by the longitudinal direction of the heddle body and the warp thread direction.
Das Fadenauge wird durch zwei in Längsrichtung mit Abstand zueinander angeordnete Fadenauflageflächen des Litzenkörpers begrenzt. Jede Fadenauflagefläche erstreckt sich zwischen einer ersten Längsseite und einer zweiten Längsseite des Litzenkörpers. Die beiden Längsseiten sind zumindest im Anschluss an das Fadenauge vorzugsweise stufenlos und/oder kantenlos ausgestaltet. Jede Fadenauflagefläche weist einen ersten ebenen Flächenabschnitt und einen zweiten ebenen Flächenabschnitt auf. Die beiden Flächenabschnitte sind über einen zentralen Krümmungsabschnitt stufenlos und kantenlos miteinander verbunden. Die beiden Flächenabschnitte werden somit fadenschonend durch den Krümmungsabschnitt miteinander verbunden. Durch die beiden Flächenabschnitte kann die Neigung des Kettfadens auf der Kettfadeneintrittsseite bzw. der Kettfadenaustrittsseite des Fadenauges durch eine entsprechende Neigung des betreffenden Flächenabschnitts vorgegeben werden. Auf diese Weise kann das Profil der Fadenauflagefläche in Kettfadenrichtung gesehen an die Offenfachstellung des Webschafts angepasst werden, wenn der Kettfaden auf der betreffenden Fadenauflagefläche aufliegt. In der Offenfachstellung ist daher die Auflagefläche zwischen Kettfaden und Weblitze groß, was die lokale Belastung des Kettfadens reduziert. Sowohl der Verschleiß des Kettfadens, als auch der Verschleiß der Weblitze sind reduziert.The thread eye is delimited by two longitudinally spaced apart thread support surfaces of the strand body. Each thread support surface extends between a first longitudinal side and a second longitudinal side of the heddle body. The two longitudinal sides are preferably designed to be stepless and / or edgeless at least following the thread eye. Each thread support surface has a first planar surface portion and a second planar surface portion. The two surface sections are steplessly and without edges connected to one another via a central curvature section. The two surface sections are thus connected to each other thread-saving by the curvature section. Due to the two surface sections, the inclination of the warp thread on the warp thread entry side or the warp thread exit side of the thread eye can be predetermined by a corresponding inclination of the respective surface section. In this way, the profile of the thread support surface seen in the warp direction can be adapted to the open shed position of the heald, when the warp thread rests on the respective thread support surface. In the open shed position, therefore, the bearing surface between warp and heald is large, which reduces the local load of the warp. Both the warp of the warp and the weaving of the heald are reduced.
Vorteilhafterweise ist die Krümmung des zentralen Krümmungsabschnitts in Kettfadenrichtung konstant. Die Kontur des Krümmungsabschnitts folgt mithin in Kettfadenrichtung einem konstanten Radius und bildet sozusagen einen Mantelflächenabschnitt eines Kreiszylinders. Die Krümmung stellt sicher, dass die Belastung des Kettfadens im Fadenauge nicht zu groß wird.Advantageously, the curvature of the central curvature section in the warp direction is constant. The contour of the curvature section thus follows in the warp direction a constant radius and forms, so to speak, a lateral surface portion of a circular cylinder. The curvature ensures that the load of the warp thread in the thread eye is not too large.
In Längsrichtung des Litzenkörpers weist dieser zur Begrenzung des Fadenauges zwei Stege auf, die vorzugsweise dieselbe Kontur haben. Bei einem Ausführungsbeispiel ist an jedem Steg auf der der Fadenauflagefläche zugewandten Seite eine ebene Fadenführungsfläche vorgesehen. Insbesondere ist jede Fadenführungsfläche derart orientiert, dass ihr Normalenvektor in eine Querrichtung quer zur Kettfadenrichtung und quer zur Längsrichtung weist. Die Fadenführungsfläche erstreckt sich somit in einer Ebene die durch die Kettfadenrichtung und die Längsrichtung aufgespannt ist. Die in Kettfadenrichtung orientierten Fadenführungsflächen dienen zur fadenschonenden Führung des durch das Fadenauge geführten Kettfadens.In the longitudinal direction of the heddle body, this has two webs for limiting the thread eye, which preferably have the same contour. In one embodiment, a planar thread guide surface is provided on each web on the side facing the thread support surface. In particular, each yarn guide surface is oriented such that its normal vector points in a transverse direction transverse to the warp direction and transversely to the longitudinal direction. The thread guide surface thus extends in a plane which is spanned by the warp direction and the longitudinal direction. The oriented in warp direction thread guide surfaces serve to thread-gentle guidance of the guided through the thread eye warp thread.
Bei einer weiteren bevorzugten Ausführungsform ist der Längsabstand zwischen den beiden Stegen in Kettfadenrichtung gemessen zumindest fünf mal größer als der Querabstand zwischen den beiden Stegen in Querrichtung rechtwinklig zur Kettfadenrichtung und rechtwinklig zur Längsrichtung gemessen. Die im Bereich zwischen den Stegen befindliche Fadenauflagefläche bietet dabei dem Kettfaden in seiner Längserstreckung eine ausreichend große Auflagefläche, um lokale Belastungen des Kettfadens weiter zu reduzieren. Die Breite der Weblitze am Fadenauge kann maximal 20% größer sein als die Summe der Dicke der beiden Stege in Querrichtung rechtwinklig zur Kettfadenrichtung und rechtwinklig zur Längsrichtung gemessen. Dadurch ist die Weblitze in Querrichtung relativ dünn, wodurch die Anzahl der Weblitzen auf dem Webschaft sehr groß sein kann.In a further preferred embodiment, the longitudinal distance between the two webs measured in the warp direction is at least five times greater than the transverse distance between the two webs in the transverse direction at right angles to the warp direction and measured at right angles to the longitudinal direction. The thread support surface located in the area between the webs provides the warp thread in its longitudinal extent a sufficiently large contact surface in order to further reduce local loads on the warp thread. The width of the heald on the thread eye can be a maximum of 20% greater than the sum of the thickness of the two webs in the transverse direction at right angles to the warp direction and measured at right angles to the longitudinal direction. As a result, the heald is relatively thin in the transverse direction, whereby the number of healds on the heald can be very large.
Es ist außerdem vorteilhaft, wenn jede Fadenauflagefläche einen in Kettfadenrichtung gekrümmten ersten Übergangsabschnitt zwischen der ersten Längsseite des Litzenkörpers und dem ersten Flächenabschnitt und/oder einen in Kettfadenrichtung gekrümmten zweiten Übergangsabschnitt zwischen der zweiten Längsseite des Litzenkörpers und dem zweiten Flächenabschnitt aufweist. Dadurch ist ein kantenlos gekrümmter Übergang zwischen der betreffenden Fadenauflagefläche und den beiden Seitenflächen des Litzenkörpers möglich. Die Krümmung der beiden Übergangsabschnitte kann unterschiedlich groß sein. Bei einem bevorzugten Ausführungsbeispiel ist die Krümmung des ersten und/oder des zweiten Übergangsabschnitts in Kettfadenrichtung betrachtet konstant. Der erste und/oder der zweite Übergangsabschnitt gehen insbesondere stufenlos und kantenlos in den benachbarten ebenen Flächenabschnitt der Fadenauflagefläche sowie in die benachbarte Längsseite über.It is also advantageous if each thread support surface has a first transition section curved in the warp direction between the first longitudinal side of the strand body and the first surface section and / or a second transition section curved in the warp direction between the second longitudinal side of the strand body and the second surface section. As a result, an edgeless curved transition between the respective thread support surface and the two side surfaces of the heddle body is possible. The curvature of the two transition sections can be of different sizes. In a preferred embodiment, the curvature of the first and / or the second transition section is constant in the warp direction. In particular, the first and / or the second transition section pass continuously and without edges into the adjacent flat surface section of the thread support surface and into the adjacent longitudinal side.
Das an den ersten Übergangsabschnitt angrenzende Ende der ersten Seitenfläche und/oder das an den zweiten Übergangsabschnitt angrenzende Ende der zweiten Seitenfläche schließt vorzugsweise einen spitzen Winkel mit der Kettfadenrichtung ein. Die beiden Enden der ersten und zweiten Seitenfläche verlaufen insbesondere in gleichem Abstand parallel zueinander schräg zur Kettfadenrichtung. Das an den Übergangsabschnitt angrenzende Ende der betreffenden Seitenfläche verbindet die beiden Stege des Litzenkörpers.The end of the first side surface adjacent to the first transition portion and / or the end of the second side surface adjacent to the second transition portion preferably includes an acute angle with the warp direction. The two ends of the first and second side surfaces extend in particular at the same distance parallel to each other obliquely to the warp direction. The adjoining the transition portion end of the respective side surface connects the two webs of the strand body.
Bei einer bevorzugten Ausführungsform ist die erste Seitenfläche und/oder die zweite Seitenfläche in Längsrichtung gesehen zumindest im Bereich angrenzend an das Fadenauge um eine Achse parallel zur Längsrichtung gedreht, so dass der Normalenvektor der ersten Seitenfläche und/oder der zweiten Seitenfläche im Anschluss an die jeweilige Fadenauflagefläche mit der Kettfadenrichtung einen spitzen Winkel einschließt. Der Litzenkörper ist im Bereich seines Fadenauges bei dieser Ausführung um eine parallel zur Längsrichtung verlaufende Achse gedreht, wodurch zwischen den beiden Stegen ein Durchgangsbereich für den Kettfaden gebildet ist.In a preferred embodiment, the first side surface and / or the second side surface seen in the longitudinal direction at least in the area adjacent to the thread eye is rotated about an axis parallel to the longitudinal direction, so that the normal vector of the first side surface and / or the second side surface following the respective Thread support surface with the warp direction an acute Includes angle. The heald body is rotated in the region of its thread eye in this embodiment about an axis extending parallel to the longitudinal axis, whereby a passage region for the warp thread is formed between the two webs.
Es ist vorteilhaft, wenn die Neigung des ersten Flächenabschnitts in Kettfadenrichtung an einen Kettfadeneintrittswinkel und/oder die Neigung des zweiten Flächenabschnitts in Kettfadenrichtung an einen Kettfadenaustrittswinkel in der Offenstellung des zugeordneten Webschafts angepasst ist. Der Kettfadeneintrittswinkel ist der Winkel, unter dem der durch das Fadenauge geführte Kettfaden gegenüber einer rechtwinkelig zur Längsrichtung verlaufenden Bezugsebene zur Weblitze hin verläuft. Der Kettfadenaustrittswinkel ist der Winkel des Kettfadens gegenüber der Bezugsebene, unter dem der Kettfaden von der Weblitze zur Webkante hin verläuft. Bei dieser Ausgestaltung ist die lokale Belastung des Kettfadens und mithin auch die lokale Belastung der Fadenauflagefläche der Weblitze sehr gering, was den Verschleiß minimiert. Der Kettfadeneintrittswinkel und der Kettfadenaustrittswinkel sind in der Regel unterschiedlich groß.It is advantageous if the inclination of the first surface section in the warp direction is adapted to a warp thread entry angle and / or the inclination of the second surface section in the warp direction to a warp thread exit angle in the open position of the associated web. The warp thread entry angle is the angle at which the warp thread guided by the thread eye extends in relation to a reference plane extending at right angles to the longitudinal direction towards the heald. The warp thread emergence angle is the angle of the warp thread opposite the reference plane under which the warp thread runs from the heald to the selvedge. In this embodiment, the local load of the warp thread and thus also the local load of the thread support surface of the heald is very low, which minimizes wear. The warp thread entry angle and the warp thread exit angle are generally different in size.
Jeder Steg kann an seiner der Fadenführungsfläche entgegengesetzten Seite eine ebene Außenfläche aufweisen, die vorzugsweise parallel zur Fadenführungsfläche ausgerichtet ist. Die ebenen Außenflächen können sich daher parallel zur Kettfadenrichtung erstrecken, wodurch zwischen zwei benachbarten Weblitzen eines Webschafts hindurchgeführte Kettfäden an der Außenfläche entlang gleiten können.Each web may have on its side opposite the yarn guide surface a flat outer surface, which is preferably aligned parallel to the yarn guide surface. The flat outer surfaces may therefore extend parallel to the warp direction, whereby warp threads guided between two adjacent healds of a heddle may slide along the outer surface.
Der Litzenkörper weist an seinen beiden in Längsrichtung befindlichen Enden jeweils einen Endösenbereich auf, in dem jeweils eine Endöse der Weblitze zur Befestigung an einer Litzentragschiene angeordnet ist. Zumindest außerhalb dieser Endösenbereiche sind die beiden Seitenflächen des Litzenkörpers bei einer bevorzugten Ausführungsform stufenlos und kantenlos ausgestaltet. Dadurch ist sichergestellt, dass die Weblitzen an daran vorbeigeführten Kettfäden entlang gleiten können, ohne sich mit diesen Kettfäden zu verhaken.The heddle body has at its two ends in the longitudinal direction in each case an end eye region, in each of which an end eye of the heddle for attachment a Litzentragschiene is arranged. At least outside these Endösenbereiche the two side surfaces of the Litzenkörpers are in a preferred embodiment infinitely and edged designed. This ensures that the heddles can glide along warp threads passing by without tangling with these warp threads.
Die Weblitze ist vorzugsweise aus Kunststoff und/oder einem Verbundwerkstoff auf Kunststoffbasis hergestellt, insbesondere durch ein Gießverfahren, beispielsweise Spritzgießen. Die Weblitze kann naht- und fügestellenfrei aus einem einheitlichen Material einstückig hergestellt sein. Vorzugsweise wird das Fadenauge unmittelbar vom Litzenkörper begrenzt. Fadenaugeneinsätze, wie etwa ein Maillon können entfallen.The heddle is preferably made of plastic and / or a composite material based on plastic, in particular by a casting method, for example injection molding. The heald can be manufactured in one piece seamlessly and seamlessly from a uniform material. Preferably, the thread eye is bounded directly by the strand body. Thread eye inserts, such as a Maillon can be omitted.
Vorteilhafte Ausgestaltungen der erfindungsgemäßen Weblitze ergeben sich aus den abhängigen Patentansprüchen sowie der Beschreibung. Die Beschreibung beschränkt sich auf wesentliche Merkmale der Erfindung sowie sonstiger Gegebenheiten. Die Zeichnung ist ergänzend heranzuziehen. Nachfolgend wird die Erfindung anhand von Ausführungsbeispielen unter Bezugnahme auf die Zeichnung erläutert. Es zeigen:
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Figur 1 eine schematische Darstellung einer Weblitze in einer Seitenansicht in Querrichtung quer zur Kettfadenrichtung und zur Längsrichtung des Litzenkörpers gesehen, -
Figur 2 eine schematische Prinzipdarstellung des Kettfadenverlaufs durch zwei beispielhaft dargestellte Webschäfte in einer perspektivischen Ansicht, -
Figur 3 den Kettfadenverlauf gemäßFigur 2 in einer schematischen Seitenansicht, -
Figur 4 eine perspektivische Darstellung eines das Fadenauge aufweisenden Abschnitts eines Ausführungsbeispiels einer Weblitze, -
Figur 5 das Schnittbild der Weblitze ausFigur 4 gemäß der Schnittlinie V-V inFigur 4 , -
Figur 6 das Fadenauge der Weblitze gemäß derFiguren 4 und5 in vergrößerter Darstellung, -
Figur 7 eine schematische Prinzipdarstellung der Fadenauflagefläche der Weblitze mit Blick in Längsrichtung und -
Figur 8 eine geschnittene Teildarstellung durch den Litzenkörper im Bereich einer Fadenauflagefläche, wobei die Schnittebene in Kettfadenrichtung und in Längsrichtung ausgerichtet ist.
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FIG. 1 a schematic representation of a heald seen in a lateral view in the transverse direction transverse to the warp direction and the longitudinal direction of the strand body, -
FIG. 2 2 shows a schematic basic illustration of the warp thread course through two healds, shown by way of example, in a perspective view, -
FIG. 3 the warp thread according toFIG. 2 in a schematic side view, -
FIG. 4 3 is a perspective view of a thread eye portion of an embodiment of a heald, -
FIG. 5 the sectional view of the healdFIG. 4 according to the section line VV inFIG. 4 . -
FIG. 6 the thread eye of the heald according toFIGS. 4 and5 in an enlarged view, -
FIG. 7 a schematic diagram of the thread support surface of the heald with a view in the longitudinal direction and -
FIG. 8 a sectional partial view through the heald body in the region of a thread support surface, wherein the cutting plane is aligned in the warp direction and in the longitudinal direction.
Die Erfindung betrifft eine Weblitze 10, wie sie schematisiert in
Die Webschäfte 14 werden zur Bildung eines Webfachs in einer Vertikalrichtung bewegt, die in Gebrauchslage der Weblitzen 10 der Längsrichtung L des Litzenkörpers 11 entspricht. Die durch die Fadenaugen 15 der Weblitzen 10 geführten Kettfäden 16 werden dabei aus einer horizontalen Ebene heraus nach oben oder nach unten ausgelenkt. Die Kettfäden 16 verlaufen ausgehend von einem Streichbaum 19 oder ausgehend von Teilstäben zur jeweils zugeordneten Weblitze 10 hin und treten auf der Kettfadeneintrittsseite 20 in das Fadenauge 15 der Weblitze 10 ein. In der Offenfachstellung verlaufen die Kettfäden 16 auf der Kettfadeneintrittsseite 20 gegenüber einer Horizontalebene unter einem Kettfadeneintrittswinkel α geneigt zum Fadenauge 15 hin. Auf der der Kettfadeneintrittsseite 20 entgegengesetzten Kettfadenaustrittsseite 21 tritt der Kettfaden 16 gegenüber einer horizontalen Ebene unter einem Kettfadenaustrittswinkel β aus dem Fadenauge 15 aus und verläuft zu einer Gewebekante 22 hin. Wie dies in
Der Litzenkörper 11 weist zumindest außerhalb seiner beiden Endösenbereiche 12 eine vollständig kantenlose und stufenlose Außenfläche auf. Dadurch ist sichergestellt, dass zwischen zwei benachbarten Weblitzen 10 hindurchgeführte Kettfäden 16 eines anderen Webschafts 14 fadenschonend an der Weblitze 10 entlang gleiten können ohne hängen zu bleiben. Die Gefahr eines übermäßigen Verschleißes der Kettfäden 16 bzw. eines Fadenbruchs ist dadurch reduziert. Die in
Zur fadenschonenden Aufnahme des Kettfadens 16 weist das Fadenauge 15 eine besondere Gestalt auf. In Längsrichtung L ist das Fadenauge 15 durch zwei einander gegenüberliegende Fadenauflageflächen 25 begrenzt. Befindet sich der die Weblitze 10 tragende Webschaft 14 im Oberfach oder im Unterfach, liegt der durch das Fadenauge 15 geführte Kettfaden 16 auf einer der beiden Fadenauflageflächen 25 auf.For thread-saving recording of the
In einer Querrichtung Q rechtwinklig zur Kettfadenrichtung F und rechtwinklig zur Längsrichtung L ist das Fadenauge 15 durch zwei mit Abstand zueinander angeordnete Stege 26 begrenzt. Jeder Steg 26 weist auf seiner dem Kettfaden 16, der durch das Fadenauge 15 durchgeführt ist, zugeordneten Seite eine ebene Fadenführungsfläche 27 auf. Die Fadenführungsfläche 27 eines Steges 26 erstreckt sich in einer Ebene, die durch die Kettfadenrichtung F sowie die Längsrichtung L aufgespannt ist. Der Normalenvektor NF einer Fadenführungsfläche 27 zeigt in Querrichtung Q. Die Fadenführungsfläche 27 eines Steges 26 verbindet die beiden Fadenauflageflächen 25 des Litzenkörpers 11. Dadurch entsteht ein durch die beiden Fadenauflageflächen 25 sowie die beiden Fadenführungsflächen 27 an den Stegen 26 ringsumlaufend begrenztes Fadenauge 15.In a transverse direction Q at right angles to the warp direction F and at right angles to the longitudinal direction L, the
Jeder Steg 26 weist auf seiner der Fadenführungsfläche 27 entgegengesetzten vom Fadenauge 15 abgewandten Seite eine ebene Außenfläche 28 auf. Die Außenfläche 28 verläuft parallel zur Fadenführungsfläche 27. Die Dicke d eines Stegs 26 in Querrichtung Q wird zwischen der Fadenführungsfläche 27 und der Außenfläche 28 gemessen und beträgt beispielsweise zwischen 0,4 und 0,5 Millimetern. Die Außenflächen 28 der Stege 26 sind Bestandteil der Außenfläche des Litzenkörpers 11 und nicht durch Stufen oder Kanten begrenzt.Each
Die beiden in etwa in Kettfadenrichtung F weisenden Längskanten 29 jedes Steges 26 verbinden die Fadenführungsfläche 27 und die Außenfläche 28. Sie sind gekrümmt bzw. gewölbt ausgeführt, so dass die Fadenführungsfläche 27 und die Außenfläche 28 über die beiden Längskanten 29 des Steges 26 stufenlos und kantenlos miteinander verbunden sind. Die beiden in Kettfadenrichtung F einander zugewandten Längskanten 29 zweier Stege 26 eines Litzenkörpers 11 weisen beim Ausführungsbeispiel einen konstanten Radius auf, wie dies in
Zwischen den beiden ein Fadenauge 15 begrenzenden Stegen 26 ist ein Längsabstand DL vorhanden, der der lichten Weite zwischen den beiden Stegen 26 in Kettfadenrichtung F entspricht. In Querrichtung Q wird zwischen den beiden Stegen 26 und beispielsgemäß zwischen den beiden ebenen Fadenführungsflächen 27 ein Querabstand DQ gemessen, der der lichten Weite zwischen den beiden Stegen 26 in Querrichtung Q entspricht. Der Längsabstand DL ist zumindest 5 mal und insbesondere 5 bis 7 mal größer als der Querabstand DQ. Der Querabstand DQ kann beispielsweise 0,15 bis 0,2 mm betragen. Der Längsabstand DL kann beispielsweise 1 mm bis 1,5 mm betragen. Die Breite B des Litzenkörpers 11 im Bereich des Fadenauges 15 ist durch den Abstand der Außenflächen 28 der Stege 26 gemessen in Querrichtung Q beschrieben. Bei dem hier dargestellten Ausführungsbeispiel kann die Breite B 1,0 bis 1,5 mm betragen. Die Breite B des Litzenkörpers 11 am Fadenauge 15 kann beispielsweise maximal 10% größer sein als die Summe der Dicke d der beiden Stege 26.Between the two a
Die Fadenauflagefläche 25 ist in mehrere Bereiche unterteilt. Die verschiedenen Bereiche sind in den
Aufgrund dieser Ausrichtung der Längsseiten 33, 34 des Litzenkörpers 11 im Bereich des Fadenauges 15 erstreckt sich das an die Fadenauflagefläche 25 angrenzende Ende 33a der ersten Seitenfläche 33 bzw. das an die Fadenauflagefläche 25 Ende 34a der zweiten Seitenfläche 34 unter dem Drehwinkel γ gegenüber der Kettfadenrichtung F und mithin schräg zur Kettfadenrichtung F und auch schräg zur Querrichtung Q.Due to this alignment of the
Der Abstand DS zwischen den beiden Seitenflächen 33, 34 des Litzenkörpers 11 angrenzend an das Fadenauge 15 in Richtung der Normalenvektoren NA der beiden Seitenflächen 33, 34 gemessen, ist größer als die Dicke d eines Steges 26. Beim Ausführungsbeispiel entspricht dieser Abstand DS der beiden Seitenflächen 33, 34 in etwa der Diagonalabmessung eines Stegs 26. Der Abstand DS zwischen den beiden Seitenflächen 33, 34 ist kleiner als der Längsabstand DL zwischen den beiden Stegen 26.The distance DS between the two
Zwischen dem Ende 33a der ersten Seitenfläche 33 und dem Ende 34a der zweiten Seitenfläche 34 verläuft die Fadenauflagefläche 25. Diese weist einen ersten Übergangsabschnitt 40 angrenzend an die erste Seitenfläche 33 und einen zweiten Übergangsabschnitt 41 angrenzend an die zweite Seitenfläche 34 auf. Die beiden Übergangsabschnitte 40, 41 sind gekrümmt ausgeführt. In Kettfadenrichtung F ist die Krümmung der Übergangsabschnitte 40, 41 beispielsgemäß konstant. In
Die beschriebene Kontur der Übergangsabschnitte 40, 41 ist auf einen Fadenführungsbereich A des Fadenauges 15 beschränkt. Unter dem Fadenführungsbereich A ist der Bereich des Fadenauges 15 zu verstehen, in dem sich der Kettfaden 16 zwischen den Stegen 26 in Querrichtung Q bewegen kann. Der Fadenführungsbereich A ist beispielsgemäß durch die beiden Ebenen begrenzt, die von den beiden Fadenführungsflächen 27 der Stege 26 definiert sind (
Bei einer abgewandelten Ausführungsform kann die Krümmung zumindest eines der beiden Übergangsabschnitte 40, 41 in Kettfadenrichtung F nicht konstant sein.In a modified embodiment, the curvature of at least one of the two
Die Fadenauflagefläche 25 weist außerdem einen ersten ebenen Flächenabschnitt 42 und einen zweiten ebenen Flächenabschnitt 43 auf. Die beiden Flächenabschnitte 42, 43 erstrecken sich in unterschiedlichen Ebenen. Der erste Flächenabschnitt 42 verläuft gegenüber einer sich rechtwinkelig zur Längsrichtung L erstreckenden Bezugsebene E um einen ersten Neigungswinkel δ1 geneigt. Der erste Neigungswinkel δ1 ist in Kettfadenrichtung F konstant. Der zweite Flächenabschnitt 43 verläuft gegenüber der Bezugsebene E um einen zweiten Neigungswinkel δ2 geneigt. Der zweite Neigungswinkel δ2 ist in Kettfadenrichtung F konstant. Der erste Neigungswinkel δ1 entspricht dem Kettfadeneintrittswinkel α und der zweite Neigungswinkel δ2 entspricht dem Kettfadenaustrittswinkelβ. Befindet sich die Weblitze 10 in einem Webschaft 14 in der Offenfachstellung, so liegt der Kettfaden an den beiden Flächenabschnitten 42, 43 an und wird insbesondere durch die beiden Übergangsbereiche 40, 41 nicht beaufschlagt. Gegenüber der gekrümmten Oberfläche der Übergangsbereiche 40, 41 erstreckt sich der Kettfaden 16 tangential in Richtung des betreffenden ebenen Flächenabschnitts 42 bzw. 43, so dass er die Übergangsbereiche 40, 41 übergreift erst mit den ebenen Flächenabschnitten 42, 43 in Kontakt gelangt.The
Zwischen den beiden ebenen Flächenabschnitten 42, 43 ist ein zentraler Krümmungsabschnitt 44 vorhanden, der die beiden ebenen Flächenabschnitte 42, 43 stufenlos und kantenlos miteinander verbindet. In Kettfadenrichtung F weist der Krümmungsabschnitt 44 beim Ausführungsbeispiel eine konstante Krümmung auf. Im Schnittbild nach
Die Kontur der Fadenauflagefläche 25 ist daher gegenüber der Mittelebene X zwischen den beiden Seitenflächen 33,34 unsymmetrisch. Bei einer abgewandelten Ausführung kann die Kontur jedoch bezüglich dieser Mittelebene X aus symmetrisch ausgestaltet sein.The contour of the
Die Fadenauflagefläche 25 ist insgesamt stufen- und kantenlos ausgeführt. In Kettfadenrichtung F betrachtet weist sie abschnittsweise eine konstante Neigung oder eine konstante Krümmung auf, wobei jeweils tangentiale Übergänge geschaffen sind. Das Konturprofil der Fadenauflagefläche ist erfindungsgemäß in Kettfadenrichtung F definiert vorgegeben und somit schräg zu den Normalenvektoren NA der sich an die Fadenauflagefläche 25 anschließenden Seitenflächen 33, 34 des Litzenkörpers 11.The
Die beschriebene Krümmung oder Neigung der Fadenauflagefläche 25 und ihrer Abschnitte 40, 41, 42, 43, 44 ist wie erwähnt zumindest im Fadenführungsbereich A vorgesehen und kann außerhalb des Fadenführungsbereichs A davon abweichen.The described curvature or inclination of the
Die Erfindung betrifft eine Weblitze 10 für einen Webschaft 14. Die Weblitze 10 weist einen Litzenkörper 11 auf, der vorzugsweise aus Kunststoff durch Spritzgießen hergestellt ist. Ein Fadenauge 15 der Weblitze 10 dient zur Durchführung eines Kettfadens 16 in einer Kettfadenrichtung F. In Längsrichtung L des Litzenkörpers 11 gesehen ist das Fadenauge 15 durch zwei einander gegenüberliegende Fadenauflageflächen 25 begrenzt. Die beiden Fadenauflageflächen 25 sind identisch gestaltet. Jede Fadenauflagefläche 25 weist einen ersten ebenen Flächenabschnitt 42 sowie einen zweiten ebenen Flächenabschnitt 43 auf. In Kettfadenrichtung F gesehen ist die Neigung δ der beiden Flächenabschnitte 42, 43 jeweils konstant und vorzugsweise unterschiedlich groß. Die Neigung δ wird gegenüber einer Bezugsebene E gemessen, die in Gebrauchslage der Weblitze 10 horizontal orientiert ist. Die beiden Flächenabschnitte 42, 43 werden stufenlos und kantenlos durch einen dazwischen liegenden zentralen Krümmungsabschnitt 44 miteinander verbunden, der mit Blick auf die Fadenauflagefläche 25 gesehen eine konvexe Form aufweist.The invention relates to a
- 1010
- Weblitzeheald
- 1111
- Litzenkörperheald
- 1212
- EndösenbereichEndösenbereich
- 1313
- Endöseend loop
- 1414
- Webschaftheald
- 1515
- Fadenaugethread eye
- 1616
- Kettfadenwarp
- 1919
- Streichbaumback rest
- 2020
- KettfadeneintrittsseiteKettfadeneintrittsseite
- 2121
- KettfadenaustrittsseiteKettfadenaustrittsseite
- 2222
- Gewebekanteselvedge
- 2525
- FadenauflageflächeThread bearing surface
- 2626
- Stegweb
- 2727
- FadenführungsflächeThread guide surface
- 2828
- Außenflächeouter surface
- 2929
- Längskante des StegsLongitudinal edge of the bridge
- 3333
- erste Seitenflächefirst side surface
- 33a33a
- Ende der ersten SeitenflächeEnd of the first side surface
- 3434
- zweite Seitenflächesecond side surface
- 34a34a
- Ende der zweiten SeitenflächeEnd of the second side surface
- 3535
- Längskante des LitzenkörpersLongitudinal edge of the strand body
- 4040
- erster Übergangsabschnittfirst transitional section
- 4141
- zweiter Übergangsabschnittsecond transitional section
- 4242
- erster Flächenabschnittfirst area section
- 4343
- zweiter Flächenabschnittsecond surface section
- 4444
- Krümmungsabschnittcurved section
- αα
- KettfadeneintrittswinkelKettfadeneintrittswinkel
- α1α1
- erster Wert des Kettfadeneintrittswinkelsfirst value of the warp thread entry angle
- α2α2
- zweiter Wert des Kettfadeneintrittswinkelssecond value of the warp thread entry angle
- ββ
- KettfadenaustrittswinkelKettfadenaustrittswinkel
- β1β1
- erster Wert des Kettfadenaustrittswinkelsfirst value of Kettfadenaustrittswinkels
- β2β2
- zweiter Wert des Kettfadenaustrittswinkelssecond value of Kettfadenaustrittswinkels
- γγ
- Drehwinkelangle of rotation
- δ1δ1
- erster Neigungswinkelfirst inclination angle
- δ2δ2
- zweiter Neigungswinkelsecond inclination angle
- BB
- Breite des LitzenkörpersWidth of the strand body
- dd
- Dicke des StegsThickness of the bridge
- DLDL
- Längsabstandlongitudinal distance
- DQDQ
- Querabstandtransverse distance
- DSDS
- Abstand zwischen den SeitenflächenDistance between the side surfaces
- Ee
- Bezugsebenereference plane
- FF
- Kettfadenrichtungwarp
- LL
- Längsrichtunglongitudinal direction
- MM
- LängsmittelebeneLongitudinal center plane
- NAN / A
- Normalenvektor der SeitenflächenNormal vector of the side surfaces
- NFNF
- Normalenvektor der FadenführungsflächenNormal vector of thread guide surfaces
- r1r1
- erster Radiusfirst radius
- r2r2
- zweiter Radiussecond radius
- r3r3
- dritter Radiusthird radius
- Querrichtungtransversely
- XX
- Mittelebenemidplane
Claims (15)
- Heald (10) for a heald frame (14),
with a heald body (11), which extends in a longitudinal direction (L) and which has a thread eyelet (15) that serves to receive a warp thread (16), which passes through the thread eyelet (15) in a warp thread direction (F),
wherein the thread eyelet (15) is delimited by two thread supporting surfaces (25) spaced from one another in the longitudinal direction (L) on the heald body (11), and which extend respectively between a first longitudinal side (33) and a second longitudinal side (34) of the heald body (11),
characterised in that each thread supporting surface (25) has a first plane surface section (42) and a second plane surface section (43), which are connected to one another without steps and without edges by means of a curvature section (44). - Heald (10) according to claim 1, characterised in that the curvature (1/r3) of the central curvature section (44) is constant in the warp thread direction (F).
- Heald (10) according to claim 1 or 2, characterised in that the thread eyelet (15) is additionally delimited by two webs (26), which extend in the longitudinal direction (L) of the heald body (11) and which respectively have a plane thread guide surface (27).
- Heald (10) according to claim 3, characterised in that the normal vector (NF) of the thread guide surface (27) is oriented in transverse direction (Q) transversely to warp thread direction (F) and transversely to the longitudinal direction (L).
- Heald (10) according to claim 3 or 4, characterised in that the longitudinal spacing (DL) of the two webs (26) viewed in warp thread direction (F) is at least five times larger than the transverse spacing (DQ) of the two webs (26) measured in transverse direction (Q) at right angles to the warp thread direction (F) and to the longitudinal direction (L).
- Heald (10) according to one of claims 2 to 5, characterised in that the width (B) of the heald (10) at the thread eyelet (15) is at maximum 20% larger than the sum of the thickness of the two webs (26) measured in transverse direction (Q) at right angles to the warp thread direction (F) and to the longitudinal direction (L).
- Heald (10) according to one of the preceding claims, characterised in that each thread supporting surface (25) has a first transition section (40) curved in warp thread direction (F) between the first longitudinal side (33) and the first surface section (42) and/or a second transition section (41) curved in warp thread direction (F) between the second longitudinal side (34) and the second surface section (43).
- Heald (10) according to claim 7, characterised in that an end (33a) of the first side face (33) adjoining the first transition section (40) and/or an end (34a) of the second side face (34) adjoining the second transition section (41) encloses an acute angle with the warp thread direction (F).
- Heald (10) according to claim 7 or 8, characterised in that the curvature (1/r1) of the first transition section (40) and/or the curvature (1/r2) of the second transition section (41) in warp thread direction (F) is constant at least in a thread guide region (A), in which the warp thread (16) can move in transverse direction (Q) in the thread eyelet (15) between the webs (26).
- Heald (10) according to one of the preceding claims, characterised in that the normal vector (NA) of the first side face (33) and/or the second side face (34) adjoining the respective thread supporting surface (25) encloses an acute angle with the warp thread direction (F).
- Heald (10) according to one of the preceding claims, characterised in that the inclination (δ1) of the first surface section (42) is adapted to the warp thread entry angle (α) and/or the inclination (δ2) of the second surface section (43) is adapted to the warp thread exit angle (β) in the open shed position of the associated heald frame (14).
- Heald (10) according to one of the preceding claims, characterised in that on its side opposite the thread guide surface (27) each web (26) has a plane outer surface (28), which is aligned parallel to the thread guide surface (27).
- Heald (10) according to one of the preceding claims, characterised in that the first side face (33) and/or the second side face (34) is configured without steps and without edges at least outside the end eyelet regions (12).
- Heald (10) according to one of the preceding claims, characterised in that the thread eyelet (15) is delimited directly by the heald body (11).
- Heald (10) according to one of the preceding claims, characterised in that it is a plastic heald.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11186129.0A EP2584078B1 (en) | 2011-10-21 | 2011-10-21 | Heald with yarn-friendly yarn eyelet |
JP2012224441A JP6126767B2 (en) | 2011-10-21 | 2012-10-09 | Held with warp-friendly eyes |
KR1020120115269A KR101997537B1 (en) | 2011-10-21 | 2012-10-17 | Healds with thread-friendly thread eye |
TW101138555A TWI583837B (en) | 2011-10-21 | 2012-10-19 | Healds with thread-friendly thread eye |
CN201210558533.2A CN103184610B (en) | 2011-10-21 | 2012-10-19 | There is the heald of the guide eye of yarn friendly |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11186129.0A EP2584078B1 (en) | 2011-10-21 | 2011-10-21 | Heald with yarn-friendly yarn eyelet |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2584078A1 EP2584078A1 (en) | 2013-04-24 |
EP2584078B1 true EP2584078B1 (en) | 2015-08-26 |
Family
ID=45002602
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11186129.0A Active EP2584078B1 (en) | 2011-10-21 | 2011-10-21 | Heald with yarn-friendly yarn eyelet |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2584078B1 (en) |
JP (1) | JP6126767B2 (en) |
KR (1) | KR101997537B1 (en) |
CN (1) | CN103184610B (en) |
TW (1) | TWI583837B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2530502A (en) | 2014-09-23 | 2016-03-30 | Nec Corp | Communication system |
EP3067447B1 (en) * | 2015-03-13 | 2018-08-08 | Groz-Beckert KG | Heald, preferably for processing tape-shaped warp material and method of producing a heald |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3960182A (en) * | 1975-04-07 | 1976-06-01 | Staeubli, Ltd. | Heddles for weaving machines having heddle frame bars for several heddles, which bars are moved by a shed-forming device |
JPS5757097Y2 (en) * | 1978-08-03 | 1982-12-08 | ||
CH631755A5 (en) * | 1978-09-26 | 1982-08-31 | Braecker Ag | FABRIC. |
US5348055A (en) | 1993-05-06 | 1994-09-20 | Steel Heddle Mfg. Co. | Heddle eyelet structure |
DE4336362C1 (en) | 1993-10-25 | 1994-10-13 | Grob & Co Ag | Thread eyelet for a heald |
JPH09183570A (en) * | 1996-01-05 | 1997-07-15 | Hour Spindle Kk | Yarn guide of yarn twisting spindle |
JP2001303384A (en) * | 2000-04-24 | 2001-10-31 | Mitsubishi Rayon Co Ltd | Heald and method for producing reinforced fiber fabric using the same |
CN2723472Y (en) | 2005-01-11 | 2005-09-07 | 余日善 | Plastic bristle for textile machine and its processing mold |
DE102005030632B4 (en) * | 2005-07-01 | 2009-07-30 | Groz-Beckert Kg | Thread-saving heald |
CN1952234A (en) * | 2005-10-19 | 2007-04-25 | 江南大学 | Method for weaving thin flat fabric by using low-twist coarse yarn |
EP1795635B1 (en) * | 2005-12-08 | 2008-09-17 | Groz-Beckert KG | Heald for warp yarns having a band shape |
JP2008045255A (en) * | 2006-08-21 | 2008-02-28 | Sakai Ovex Co Ltd | Heald and apparatus for producing fabric |
BE1018304A3 (en) * | 2008-10-13 | 2010-08-03 | Wiele Michel Van De Nv | HEVEL. |
EP2224046B1 (en) * | 2009-02-26 | 2011-08-31 | Groz-Beckert KG | Plastic heald |
BE1018732A3 (en) * | 2009-04-24 | 2011-07-05 | Wiele Michel Van De Nv | THREE-DIMENSIONAL LEVEL. |
-
2011
- 2011-10-21 EP EP11186129.0A patent/EP2584078B1/en active Active
-
2012
- 2012-10-09 JP JP2012224441A patent/JP6126767B2/en active Active
- 2012-10-17 KR KR1020120115269A patent/KR101997537B1/en active IP Right Grant
- 2012-10-19 TW TW101138555A patent/TWI583837B/en active
- 2012-10-19 CN CN201210558533.2A patent/CN103184610B/en active Active
Also Published As
Publication number | Publication date |
---|---|
TW201333291A (en) | 2013-08-16 |
EP2584078A1 (en) | 2013-04-24 |
KR101997537B1 (en) | 2019-07-09 |
CN103184610A (en) | 2013-07-03 |
JP6126767B2 (en) | 2017-05-10 |
TWI583837B (en) | 2017-05-21 |
CN103184610B (en) | 2015-11-25 |
JP2013087410A (en) | 2013-05-13 |
KR20130044157A (en) | 2013-05-02 |
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