Heddle for a loom, in particular a circular loom
09556544 ยท 2017-01-31
Assignee
Inventors
Cpc classification
International classification
D03D41/00
TEXTILES; PAPER
Abstract
A heddle (10) is provided for weaving strip-shaped warp yarn. Said heddle (10) includes a heddle shaft (12) formed by two shaft parts (13). Said shaft parts (13) are placed on top of each other in a respective end section (15) of the heddle shaft (12) and interconnected. The end eyelets (16) of the heddle (10) are also in said end section (15). To form a yarn eye between both shaft parts (13), two separate warp yarn guiding bodies (20) are placed therebetween. To determine the position of the warp yarn guiding body (20) with respect to the heddle shaft (12), at least one shaft projection (22) is produced by stamping and subsequent bending or embossing each shaft part (13) for each warp yarn guiding body (20). Said shaft projection (22) engages in an associated recess (25) of the warp yarn guiding body (20), and a bonding connection is produced.
Claims
1. A heddle (10) for a loom, the heddle comprising: a heddle shaft (12) having two end sections (15), each end section having a respective end eyelet (16); two separate shaft parts (13) of the heddle shaft extending, at least in sections, spaced-apart from each other, at least two spaced apart warp yarn guiding bodies (20) formed from a single ring element or separate bodies that are arranged between the two shaft parts (13) and delimits a yarn eye (11) for a warp yarn, wherein each shaft part (13) is provided with at least one shaft projection (22) produced by stamping and/or bending and/or embossing, said shaft projection engaging in a respective associated recess (25) on one of the at least two spaced apart warp yarn guiding bodies (20) in order to position the one of the at least two spaced apart warp yarn guiding bodies (20) on the heddle shaft (12) or to fasten it thereto.
2. The heddle as in claim 1, wherein the two shaft parts (13) are strip-shaped.
3. The heddle as in claim 1, wherein individual ones of the at least two spaced apart at least one warp yarn guiding bodies (20) are connected to the two shaft parts (13) in a material-bonded manner.
4. The heddle as in claim 1, wherein the (20) single ring element includes the yarn eye (11), or two of the at least two spaced-apart warp yarn guiding bodies (20) extending in an extension direction (E) of the heddle shaft (12) delimit the yarn eye (11) on one upper side and one lower side.
5. The heddle as in claim 1, wherein the shaft projection (22) is connected to the shaft part (13) without any gaps in a circumferential direction.
6. The heddle: as in claim 1, wherein the shaft projection (22) is formed by a latch (23) that is exposed from the shaft part (13) by stamping.
7. The heddle as in claim 1, wherein at least one of the at least two warp yarn guiding bodies (20) has two sides with one extension (27) on each of both sides, and each extension engaging in a recess (28) on a respective associated shaft part (13).
8. The heddle as in claim 7, wherein each extension (27) transitions without offsets in a guiding surface (21) configured for support of warp yarn, or that a transition surface (27a) extending essentially along an adjacent shaft part (13) inside the yarn eye (11) is provided, said transition surface connecting the guiding surface (21) and the extension (27) without gaps.
9. The heddle as in claim 1, wherein at least one of the at least two warp yarn guiding bodies (20) tapers in an extension direction (E) of the heddle shaft (12) away from the yarn eye (11).
10. The heddle as in claim 9, wherein the at least one of the at least two warp yarn guiding bodies (20) has one lateral surface (26) extending, at least in sections, in an inclined or arcuate manner relative to the extension direction (E).
11. The heddle as in claim 10, wherein the lateral surface (26) has a first surface section (26a) and a second surface section (26b) which form different angles of inclination (1, 2) relative to the extension direction (E).
12. The heddle as in claim 1, wherein at least one of the at least two warp yarn guiding bodies (20) has, in a lateral surface (26) associated with the respective shaft part (13), at least one flow groove (38) for distribution of glue.
13. The heddle as in claim 1, wherein at least one of the at least two warp yarn guiding bodies (20) has a glue reservoir (35) that is open to a lateral surface (26) associated with the respective shaft part (13).
14. The heddle as in claim 13, wherein the recess (25) on the one of the at least two warp yarn guiding bodies (20) acts as the glue reservoir (35).
15. The heddle as in claim 13, wherein the glue reservoir (35) terminates at a filling opening (37) on a rear side (31) of the one of the at least two warp yarn guiding bodies (20), said rear side facing away from a guiding surface (21) configured for the support of warp yarn.
16. A method for the production of a heddle (10) for a loom, in particular a circular loom, wherein the heddle (10) has a heddle shaft (12) having two end sections (15), each end section having a respective end eyelet (16) and the heddle shaft has two shaft parts (13) extending, at least in sections, spaced-apart from each other, and wherein the heddle (10) has at least two spaced apart warp yarn guiding bodies (20) formed from a single ring clement or separate bodies that are arranged between the two shaft parts (13) and delimits a yarn eye (11) for a warp yarn, the method comprising: producing at least one shaft projection (22) on each shaft part (13) by stamping and/or bending and/or embossing and connecting the two shaft parts (13) at least in the two end sections (15) of the heddle shaft (12), arranging and/or fastening at least one of the at least two warp yarn guiding bodies (20) between the two shaft parts (13) in such a manner that the at least one shaft projection (22) of each shaft part (13) engages in a respective associated recess (25) on the at least one of the at least two warp yarn guiding bodies (20).
Description
BRIEF DESCRIPTION OF THE DRAWING
(1) Advantageous embodiments of the invention can be inferred from the dependent patent claims as well as from the description. The description is restricted to essential features of the invention. The drawings are to be used for supplementary reference. Hereinafter follows a detailed description of the invention with reference to the appended drawings. They show in
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DETAILED DESCRIPTION
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(12) In all the exemplary embodiments the heddle 10 has a heddle shaft 12 made of two separate, for example, strip-shaped shaft parts 13. Viewed in extension direction E, the shaft parts 13 extend completely between the two free ends 14 of the heddle shaft 12. The free ends 14, respectively, are at an end section 15 of the heddle shaft 12, in which an end eyelet 16 is provided for fastening the heddle 10 to a heddle mounting rail of the heddle shaft. As shown by the first exemplary embodiment 10a of the heddle 10, the end eyelet 16 may be configured as a closed ring, namely as an O-shaped end eyelet 16. Alternatively, the end eyelet 16 may be partially open on a longitudinal side extending in the extension direction E, as a result of which a C-shaped or J-shaped end eyelet is attained.
(13) The two strip-shaped shaft parts are placed in a planar manner directly against each other and connected in a planar manner or at some points in the end sections 15. This connection is preferably accomplished by material bonding, for example by gluing and/or welding. Considering the exemplary embodiment 10a of the heddle 10 shown by
(14) In the preferred embodiments of the heddle 10 described herein, the end eyelets 16 are directly formed by the cutouts in the two strip-shaped shaft parts 13. They can be made of a starting material, for example, when the shaft parts 13 are punched or cut out. In accordance with the example, the shaft parts 13 consist of a metal or a metal alloy. Alternatively, the shaft parts 13 may also consist of a plastic and/or a composite material.
(15) In order to form the yarn eye 11, there is between the two shaft parts 13 at least one warp yarn guiding body 20 that connects the two shaft parts 13 to each other in transverse direction Q. In the exemplary embodiments described herein, the heddle 10 comprises two warp yarn guiding bodies 20 arranged at a distance from each other in the extension direction E, said guiding bodies being configured separately from each other and not being directly interconnected. Each of the two warp yarn guiding bodies 20 has on its side facing the other warp yarn guiding body 20 a guiding surface 21 that acts as the abutment surface for the warp yarn guided through the heddle 10. The guiding surface 21 is convexly curved in warp yarn direction K. The guiding surface 21 is completely straight in transverse direction A between the two shaft parts 13.
(16) In the exemplary embodiments shown here, the two warp yarn guiding bodies 20 are identical for delimiting the yarn eye 11. The heddle 10 is symmetrical to a longitudinal plane that is defined by the warp yarn direction K and the extension direction E.
(17) In modification of the exemplary embodiments described here, it could also be that only one warp yarn guiding body 20 is used, said guiding body binding the yarn eye 11 and enclosing it in the form of a ring. The width of the yarn eye 11 is adapted to the width of the strip-shaped warp yarn that is to be woven, so that the width of the yarn eye 11 measured in transverse direction A is the same or only minimally greater than the width of the strip-shaped warp yarn. As a result of the fact that, in the exemplary embodiment, two separate warp yarn guiding bodies 20 are used and the yarn eye is not delimited in transverse direction Q by one or both warp yarn guiding bodies but by the two shaft parts 12, the dimensions of the heddle 10 in transverse direction Q may be very small. This has the advantage that the density of the warp yarns for the fabric to be produced becomes correspondingly high.
(18) At least one shaft projection 22 exists on each shaft part 13 for each of the warp yarn guiding bodies 20. The shaft projection 22 of the first exemplary embodiment 10a of the heddle 10 can be recognized in
(19) In
(20) A recess 25 is provided on each warp yarn guiding body 20, into which recess at least one associate shaft projection 22 may engage. In the first exemplary embodiment 10, each shaft projection 22 is associated with a separate recess 25. Alternatively, it is also possible for several shaft projections 23 to engage in one recess 25 when several shaft projections 22 are provided on each shaft part 13 for fastening or positioning the warp yarn guiding bodies 20, as is the case, for example, in the exemplary embodiment according to
(21) The warp yarn guiding body 20 of the first exemplary embodiment 10a of the heddle 10 thus has two recesses 25, each being arranged on opposite sides in transverse direction A. Each recess is open toward one side surface 26 of the warp yarn guiding body 20. Each lateral surface 26 of the warp yarn guiding body 20 is associated with a shaft part 13 and abuts at least partially against said shaft part.
(22) The shape or the contour of the recess 25 may be selected depending on the shape and contour of the shaft projection 22. In the first exemplary embodiment 10a of the heddle 10, the respective recess 25 does not match the dimensions of the shaft projection 22. The dimensions of the recess 25, in accordance with the example, are greater in one or two spatial directions than the dimensions of the shaft projection 22. The width of the recess 25 measured in warp yarn direction K may correspond to the width of the shaft projection 22. The width of the shaft projection 22 is less than the width of the strip-shaped shaft part 13 measured in warp yarn direction K. In this first exemplary embodiment 10a, the recess 25 has the approximate contour of a parallel epiped.
(23) In the first exemplary embodiment 10a of the heddle 10, each warp yarn guiding body 20 has on its lateral surfaces an extension 27 extending in transverse direction Q. This extension 27 engages in a recess 28 on the shaft part 13 that, for example, is configured as a recess without opening. The recess 28 may be formed by cutting out the latch 23 and bending it inward. In doing so, it is possible thatwhen the latch 23 is being exposedto cut out or punch out a region that belongs to the recess 28 in order to enlarge the recess 28 adjoining the free end 23a of the latch 23. The length of the extension 27 corresponds to at most the thickness of the shaft part 13always measured in transverse direction Q, so that the extension 27 does not project from the recess 28 of the shaft part 13 on the outside 12a of the heddle shaft 12 facing away from the yarn eye 11. This extension may be flush with the shaft part 13 as is illustrated, in particular, by
(24) Considering the exemplary embodiment, the width of the extension 27 and the width of the recess 28each measured in warp yarn direction Kcorrespond to each other. In particular, this width may also be identical to the width of the shaft projection 22 or the latch 23. The extension 27 has at least one and, in accordance with the example, two specifically parallel flat sides 29 that are provided on opposite sides of the extension 37 in warp yarn direction K and that, preferably, abut against a respective edge of the recess 28. In this manner, the warp yarn guiding body 20 is secured against rotation and is arranged, defined in its orientation, on the shaft part 23.
(25) In a few of the embodiments described herein, the extension 27 transitions without offsets and edges into the guiding surface 21. Adjoining the guiding surface 21, the extension 27 is therefore curved in warp yarn direction K, consistent with the guiding surface 21. As a result of this, the guiding surface 21 is extended, as it were, without offsets and edges into the recess 28 due to the extension 27. Alternatively thereto, it is possible in all embodiments for a transition surface 27a extending essentially along the adjacent shaft part 13 to exist inside the yarn eye 11, said transition surface 21 connecting the guiding surface 21 and the extension 27 without gaps (
(26) Measured in transverse direction Q, the width of the warp yarn guiding body 20 decreases from the guiding surface 21 in extension direction E. Thus the warp yarn guiding body 20 tapers from the yarn eye 11 in the direction toward the end eyelet 16. In the first exemplary embodiment 10a of the heddle 10, the lateral surfaces 26 of the warp yarn guiding body 20 are inclined at an angle relative to extension direction E. In accordance with the example, the lateral surfaces 26 do not exhibit a uniformly consistent inclination but have a first surface section 26a and a second surface section 26b. The two surface sections 26a and 26b directly adjoin each other. The first surface section 26a subtends a first angle of inclination 1 with a parallel relative to extension direction E, and the second surface section 26b subtends a second angle of inclination 2 different therefrom. The second angle of inclination 2 is larger than the angle of inclination 1. The second surface section 26b directly adjoins the rear side 31 of the warp yarn guiding body 20 opposite the guiding surface 21. The first surface section 26a extends from the second surface section 26b to the surface section 21. Both surface sections 26a, 26b are divided by the recess 25 and the extension 27, respectively, into spaced apart partial regions, wherein, in accordance with the example, the extension 27 is arranged between the two partial areas of the first surface section 26a. In accordance with the example, the extension 27 directly adjoins the recess 25.
(27) As shown by
(28) Referring to the preferred exemplary embodiments described herein, the warp yarn guiding bodies 20 are connected to the shaft parts 13 in a bonding manner. To accomplish this, the warp yarn guiding body 20 comprises a glue reservoir 35 that is open to the respective lateral surface 26. In the first exemplary embodiment 10a of the heddle 10 as in
(29) In the exemplary embodiment 10a of the heddle 10 of
(30) Whereas the extension 27 measured in warp yarn direction K in the warp yarn guiding bodies 20 represented in
(31) The recess 25 or the glue reservoir 35 has the shape of a conical segment in the exemplary embodiment of
(32) In all the exemplary embodiments the glue reservoir has an orifice 36 on the rear side 31. This orifice 36 on the rear side 31 represents the filling opening 37 for the glue. The glue can be filled when the warp yarn guiding body 20 is positioned, or temporarily held, in place by the shaft projections 22 between the two shaft parts 13. In doing so, the shaft projection 22 is connected in the recess 25 to the warp yarn guiding body 20 in a material-bonded manner.
(33) In order to be able to also achieve a bonding connection between the warp yarn guiding body 20 and the shaft parts 13 outside the recess 25, the exemplary embodiment shown in
(34) Also, in the warp yarn guiding body 20 shown by
(35) Different from the exemplary embodiment shown by
(36) Considering the first exemplary embodiment 10a of the heddle 10 described in conjunction with
(37) In the exemplary embodiment shown in
(38) The warp yarn guiding bodies 20 have a cylindrical form in the second exemplary embodiment 10b of the heddle 10, as well as in the third exemplary embodiment 10c of the heddle 10. In doing so, the guiding surface 21 on each warp yarn guiding body 20 is formed by a section of the cylindrical surface. The shape and configuration of the recess 25 or recesses 25 of each warp yarn guiding body 20 can principally be selected as desired. Whereas in the second exemplary embodiment 10b of the heddle 10 a single cylindrical recess 25 is provided on each warp yarn guiding body 20, each warp yarn guiding body 20 in the third exemplary embodiment 10c of the heddle 10 has a prism-shaped or pyramid-shaped recess 25 in each lateral surface 26 that also may act as glue reservoirs 35.
(39) The fourth exemplary embodiment 10d of the heddle 10 is schematically illustrated by
(40) As in the fourth exemplary embodiment 10d of the heddle 10, the warp yarn bodies 20 have a guiding surface 21 extending in a curve in warp yarn direction K. This guiding surface is provided on a guiding section 42 of the warp yarn guiding body 20. The guiding section 42 extends between the two shaft parts 13. A yarn eye 11 is formed between the two guiding sections 42 of the two warp yarn guiding bodies 20.
(41) Each warp yarn guiding body 20 has two limbs 43 extending transversely from the guiding section 42, said limbs having the side surface 26 of the warp yarn guiding body 20. Each limb 43 is associated with a shaft part 13 and abuts against said shaft part. The warp yarn guiding body 20 thus is U-shaped.
(42) The invention relates to a heddle 10 which is provided and designed, in particular for weaving strip-shaped warp yarn. Said heddle 10 comprises a heddle shaft 12 which is formed by two shaft parts 13. Said shaft parts 13 are directly placed next to each other in a respective end section 15 of the heddle shaft 12 and interconnected. The end eyelets 16 of the heddle 10 are also in said end section 15. In order to form a yarn eye 11 between both shaft parts 13, two separate warp yarn guiding bodies 20 are placed between the shaft parts 13. In order to determine the position of the warp yarn guiding body 20 with respect to the heddle shaft 12, at least one shaft projection 22 is produced by stamping and subsequent bending or by embossing, on each shaft part 13 for each warp yarn guiding body 20. Said shaft projection 22 engages in an associate recess 25 of the warp yarn guiding body 20, and a bonding connection, preferably in the recess 25 between the shaft projection 22 and the warp yarn guiding body 20 is produced.
LIST OF REFERENCE SIGNS
(43) 10 Heddle 10a First exemplary embodiment of the heddle 10b Second exemplary embodiment of the heddle 10c Third exemplary embodiment of the heddle 10d Fourth exemplary embodiment of the heddle 11 Yarn eye 12 Heddle shaft 12a Outside of the heddle shaft 13 Shaft part 14 Free end of the heddle shaft 15 End section 16 End eyelet 20 Warp yarn guiding body 21 Guiding surface 22 Shaft projection 23 Latch 23a Free end of the latch 23b Stationary end of the latch 25 Recess 26 Lateral surface of the warp yarn guiding body 27 Extension 27a Transition surface 28 Cutout 29 Flat side 30 Inside of the shaft part 31 Rear side of the warp yarn guiding body 35 Glue reservoir 36 Orifice 37 Filling opening 38 Flow groove 40 Concavity 41 Tube piece 42 Guiding section 43 Limb 1 First angle of inclination 2 Second angle of inclination E Direction of extension K Warp yarn direction Q Transverse direction