SK672001A3 - Leno heddle - Google Patents

Abstract

A leno heddle (18) consists of two basic parts, namely of the metallic doup heddle (1) and plastic lifting heddle (9). Lifting heddle (9) comprised of a pair of lifting shanks (10, 11), in each of said arms in the contact portion (23) the guiding slot (21, 24, 25, 29) is formed which the through guiding orifice (17) of the taper (16) is lead in. The lower portion of the guiding slot (21, 24, 25, 29), adjacent to the lower arm (15) of the shank (10, 11), forms a stop (22) of the taper (20). The guiding slot (21, 24, 25, 29) can be e.g. half-circular, droplet-shaped or triangular. The end hang loops (12, 13) of the shanks (10, 11) of the lifting heddle (9) are formed in a C-shaped hanger (19) with the rounded enlarged termination, and can be once or three times thickened, when compared with the arms (14, 15) of the shanks (10, 11). The doup heddle (1) features the interruption (7, 8) in the lower outer portion of the hanging guide (3).

Description

The invention relates to a bead heald according to the identical preamble of independent claims 1 and 14 of the invention.

BACKGROUND OF THE INVENTION

At present, two methods of weaving bead fabrics are used, namely the so-called fixed weave and bead healds. A bead weave is formed during the basic movements of the weaving machine. The method of binding the beaded fabrics is carried out by a pair of oppositely arranged beaded healds, each beaded heald being made of a plastic traction heald with a pair of lifting rods and a metal half-shell.

The bead heald is described e.g. in Swiss patent no. No. 579,161 and U.S. Pat. Its metal half-shell has the same thickness over its entire length of the shoulders, bridge, eyelet and overhead cable. The suspension guide is formed as a longitudinally closed eye from the outside of each arm. The metal material of the cushion guarantees its good function and durability. The eyelet of the metal half-shell has an optimal shape for guiding one of the warp threads. In the case of a closed pendant arm hinge guide, a perfect hinge of the metal pintle is provided in the support element of the heald shaft. In normal operation, however, occasionally damage to the plastic rod occurs, which must then be replaced under operating conditions, while the closed hinge guide of the armrest arm prevents the rod from being replaced. Each of the two lifting rods of the plastic drawbar consists of an open upper and lower hinge foot, an upper and a lower arm, and an extended haunch. The inlet is provided with a guide hole, the lower end of which is adjacent to the lower arm, forming a stop. In the aforementioned patents, each lifting rod is provided with an extended start in the upper arm and upper hinge with several reinforcing elements that extend the lifetime of the lifting rods, but are more difficult to manufacture.

SUMMARY OF THE INVENTION

Said drawbacks are eliminated or substantially reduced by the bead heald using the features of the preamble of claim 1, so that the bead heald is additionally provided with the features of the characterizing portion of claim 1. In this arrangement, each hoisting rod of the pull heald has a guide notch in the contact portion. it forms a stop to the lower arm, and a through hole opens into the guide recess. The right-hand draw-in recess follows the left-hand drawbar's draw-back recess. Advantages include prolonging the service life of the bead heald, improving the resistance to mechanical stress of the plastic drawbar tow rods, less wear on both warp threads, and easy access to guide the warp thread into the eyelet of the metal quilt, including easier operation. The guide notch contributes to easier guidance of one of the warp yarns, where under the contact portion the plastic material does not break and the warp yarns themselves are not damaged.

Preferred embodiments of the bead heald can be derived from the independent claims.

When the guide notch of the two drawbar healds is semicircular, when the two lift rods are assembled, both semicircular cutouts produce an optimum circular hole that follows the pintle eyelet so that both warp threads do not grip when the metal pithle stops. Also, the production of this opening is easy.

Each traction heald lifting rod may have each of its hinged heel shaped into a C-shaped hinge with a rounded extended end. The hinge increases the mechanical strength of the hinge foot and its rounding reduces the specific pressure load of the hinge foot.

When the guide recess has a drop shape, the manufacture of which is relatively easy, e.g. a semicircular shape with a lower gradual transition portion between the stop and the contact portion of the lower arm, then when the two lifting rods are folded, the two upper semicircular slots predominantly form a circular opening that follows the pintle eye so that the two warp threads do not grip at the stop. The gradual lower transition portion is shaped to move the warp threads on the stop and increases the mechanical resistance of the stop edges against wear during long periods of operation. The use of the droplet shape of the guide slot is intended mainly for finer threads, threads with a lower tex number.

The guide recess of the two drawbar healds may be triangular, either with the same or different lengths of the two guide edges. The triangular guide cut-out of both drawbar healds represents an extension of the field of application to other types of yarn input material with a medium or higher tex number. The triangular guide slot between the upper guide edge facing the leading edge and the lower guide edge facing the lower arm may have a right or acute angle. The right angle between the two guide edges eliminates the effect of uneven tension in the warp threads. The acute angle between the two guide edges is worthy of threads with different tex numbers in one warp. The triangular guide slot may have an upper guide edge shorter than the lower guide edge, or both guide edges may be equally long. If both leading edges have the same length, the rods are suitable for textured yarns. If the upper guide edge of the guide hole is shorter than the lower edge, the guide cutout simulates a droplet shape.

Gradual rounding of any passage of the draw-in of the drawbar of the rods does not disturb the sharp edges of these passages, thus eliminating the tearing of the fibers or their fiberisation. It also facilitates the sliding of the warp threads from the guide slot and the guide opening.

If the upper and / or lower hinge feet have a thickness one to three times greater than the upper or lower link arms of the drawbar, this is useful and sometimes necessary in the extreme stress of the warp threads.

In a preferred embodiment, both traction heald lifting rods are made of polyoxymethylene - POM. which is self-lubricating and necessary mechanical-physical properties for the given technology of bead weaving.

Said disadvantages of the metal quilt are eliminated or substantially reduced in a bead heald having the properties of the preamble of independent claim 14 (identical to the preamble of independent claim 1) of the present invention, wherein each hinge line of the quilt has a break at the lower outer portion. This new embodiment of the metal half-shell can also be used for the above-mentioned plastic traction heald according to the invention. The main advantage of interrupting the hinge line of the metal half-shell is to facilitate easier replacement of the damaged part of the plastic traction heald, in which the metal half-shell can be re-inserted into the heald shaft after interruption with a new undamaged plastic half-heald.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention is described in detail below with reference to the accompanying drawings, in which: FIG. 1 shows a front view of a metal half-shell, FIG. 2 is a side view of the jovial half-shell of FIG. 1, FIG. Fig. 3 is a front elevation view of a traction heald formed by a pair of lifting rods each having a semicircular guide cut-out; 4 is a front elevation of the right-hand lifting rod of FIG. 3, FIG. 5 is a side view of FIG. 4 from the leading edge of the drawbar, FIG. 6 is a side view of FIG. 4 from the outside of the drawbar, FIG. Fig. 7 is a front elevation view of a bead heald with a semicircular guide cutout of the drawbar heald rods and a half-grid shown in phantom; 8 shows a detail of the upper hinge foot of the left drawbar of FIG. 3, FIG. 9 shows a detail of the upper hinge foot of the right-hand drawbar of FIG. 3, FIG. 10 shows a detail of the lower hinge foot of the left drawbar of FIG. 3, FIG. 11 shows a detail of the lower hanger foot of the right-hand drawbar of FIG. 3, FIG. 12 shows the start-up detail of the right-hand lifting rod of FIG. 3 and FIG. 13 shows a detail of the region of the bead heald in FIG. 7;

Fig. Fig. 14 is a front elevation view of a bead heald with a drop-shaped guide cutout of the drawbar heald rods and a dashed line shown in phantom; 15 shows a side view of the lifting rod of FIG. 14 from the leading edge of the lead-in; FIG. 16 shows a side view of the lifting rod of FIG. 14 from the outside, FIG. 17 shows a detail of the start of the right lifting rod of FIG. 14, FIG. 18 shows a detail of the start of the bead heald of FIG. 14;

Fig. Fig. 19 is a front elevation view of a bead heald with a heald heald, each rod having a triangular guide cutout with identical guide edges, wherein the metal half-shell is shown in dashed lines; 20 is a detail of the start of the right lifting rod of FIG. 19, FIG. 21 shows a detail of the start of the bead heald of FIG. 19;

Fig. Fig. 22 is a front elevation view of a bead heald with a heald heald, each rod having a triangular guide cutout with different long edges and with the metal half-shell shown in phantom; 23 shows a detail of the start of the right lifting rod of FIG. 22 and FIG. 24 is a detail of the bead heald in FIG. 22nd

DETAILED DESCRIPTION OF THE INVENTION

Example 1 (Fig. 1-13)

The metal cushion 1 (Fig. 1) is formed in the form of tweezers from two mutually parallel arms 2, 3, which at one end are connected to both arms 2, 3 by a perpendicularly arranged bridge 4 with an eyelet 5 situated from the outside. Each arm 2, 3 has at its free end an outside guide 6 arranged in the form of f

longitudinal eye. Each hinge line 6 is provided at its outer lower end with a narrow gap 7, 8. Should the suspension guide 6 of the arms 2, 3 of the metal half-shell 1 be massive, the gap or gap of the interruption 7, 8 can be replaced by a cut-out. The metal cushion 1 is formed as a whole and has the same thickness over its entire length (FIG. 2).

The drawing heald 9 (Fig. 3) is formed by two lifting rods 10. 11. The right rod 10 and the left rod 11. Each lifting rod K), 11 (Figs. 3, 4, 5, 6) consists of an upper hinge at both ends. the upper hinge foot 12 and the lower hinge foot 13. The upper hinge foot 12 extends to the upper arm 14, the lower hinge foot 13 to the lower arm 15. Both the right and left lifting arms 11, 11 have their upper arms 14 spaced apart and widened because they are subjected to greater stress than both lower arms 15 which are narrower. The lower arms 15 serve as a guide for the lifting rods 10, 11 and can therefore be relatively thin. Roughly in the middle of the lifting rod 10 between the two arms 14, 15 is an enlarged part of the lead-in 16 with a guide hole Γ7. From the side views of the hoisting rod 10 (Figs. 5, 6), it is evident that the right hoisting rod 10 has the same thickness over its entire length, excluding the middle portion of the haunch 16 that has the greatest thickness because it is exposed to maximum load during operation or Each lifting rod 10, 11 of the drawing heald 9 is formed as a single plastic unit of polyoxymethylene, made, for example, by injection molding technology.

The basic functional parts, the metal half-shell 1 and the lifting rods 10, 11 of the traction heald 9 (FIG. 7) represent the complete arrangement of the bead heald 18.

Both the upper and lower hinge feet 12, 13 are provided at their ends with a hinge 19 formed into a rounded rounded end (Figs. 8, 9, 10, 11) in the shape of the letter C.

Each lead 16 (FIGS. 12, 13) of the rods 10, 11 is provided with a leading edge 20 for guiding the correct direction of one of the warp threads and a semicircular guide slot 21 for guiding the other warp thread. The lower part of the guide slot 21 forms a stop 22, which is the bearing surface for the eyelet 5 with the bridge 4 of the metal half-shell 1. The semicircular guide slot 21 is arranged roughly in the middle of the contact portion 23 of the lead-in 16 and has a semicircular shape. 23 of the rods 10, 11 form a circular opening. The warp thread guide hole 17 (FIGS. 5, 7) is shaped from the side view of the lifting rod as a deep long groove (FIG. 5) along the entire length of the inner leading edge 16, the adjacent leading edge 20 and its contact portion 23 including a semicircular guide The guide opening 17 from this long deep groove only extends from the outer lateral side of the right drawbar 10 (FIG. 6) as a follow-up groove in the region of the lower part of the haunch 16 corresponding roughly to the region adjacent to the stressed semicircular. Similarly, the left drawbar 11 of the tractive heald 9 is shaped. Below the run-in 16, the two narrow lower arms 15 of the draw rods 11, 11 of the tractive heald 9 are arranged side by side so that their adjacent side edges shift one after the other.

Into the guide opening 17 of the semicircular guide recess 21 of the haunches 16 of the two hoisting rods 11, 11, a metal cushion 1 is inserted above the point of contact thereof, in such a way that each eyelet 9 has one eyelet 5. 16 of the heald 9 and in the gap between the upper arms 14 of the two rods 10, 11 can move freely upwards and downwards. If one of the two healds 9 is lifted, the half-shell J is raised simultaneously.

The basic principle of weaving of pearl fabrics is a system of warp and weft threads. The warp yarn guide is carried out by guiding one of the two warp yarns into the eyelet 5 of the metal quilt 1 and then loosely between the respective pairs of hoisting rods 10, 11 of the traction sheave 9 the other of the warp yarns. When the warp threads are exchanged, friction occurs and is transmitted to the contact points of the bead heald 18. The bead heaters 18 with the semicircular guide slot 21 and stop 22 reduce this friction, especially in the area of the start 16, since the fiber is in contact with the eyelet 5 of the metal. Due to the shape of the semicircular guide notch 21 with the stop 22, the contact portion 23 of the leading edge 20 and the chosen plastic material, this most stressed part of the two lifting rods 10, 11 of the truss 9 is more mechanically resistant and extends its service life. In the absence of a guide notch where the warp threads contacted directly with the plastic part at the end 16, there was a considerable edge sharpness, edge cutting and damage to the contact points of the start plastic 16 and the fiber.

The bead healds 18 are hinged in the weaving sheet by means of the hinge feet 12,

13. During the weaving itself, the shackle leaves are interchanged, and both hinge feet 12, 13 are subjected to a relatively high load. The specific pressure load during the rapid upward and downward movement of the metal cushion 1 decreases due to the expanded hinge 19 of the hinge feet 12, 13 and 19. When replacing damaged hitches of the traction heald 9 used so far, their hinged shoes often broke off. The modification with hinge 19 eliminates this problem to a considerable extent.

In an existing weaving process, where in a weaving machine, e.g. The 500 bead healds 18 arranged one behind the other in the sheet, during normal operation, wear of the individual bead healds 18 and also extreme wear of e.g. Pair of plastic lifting rods 10. 11. Extraction heald 9. So far, the replacement of very damaged plastic lifting rods 10, 11 has been done so that the metal has first been destroyed. · · ··· · · · · · · · · · · · · · · · · · · · The half-shell 1 by cutting its suspension line 6, then removed it. from the sheet, the metal cushion 1 and then the damaged plastic lifting rods 10, 11 of the traction heald 9. By splitting the suspension guide 6, the entire metal cushion 1 has been destroyed. The new proposed solution of the metal quilt 1 with the break 7, 8 of the suspension guide 6 makes it possible to remove the damaged plastic traction heald 9 without any damage and without its destruction and after replacing the plastic lifting rods 10, 11 of the trunnion 9 , 8 of the overhead guide 6 to be reused in the new bead heald 18.

Example 2 (Figs. 14-18)

The bead heald 18 shown in FIG. 14 corresponds to the previous exemplary embodiment, including its function, except that the traction heald 9 has hinge feet 12, 13 shaped on both lifting rods 10, 11 (FIGS. 15, 16) such that they have approximately two times greater thickness relative to Another difference is that each lead 16 (Figs. 17, 18) of the draw bars 10, 11 is provided with a drop-like guide slot 24 with a lower gradual portion to guide the second warp thread. The lower portion of the droplet guide cutout 24 forms a stop 22, which is a bearing surface for the eyelet 5 with the bridge 4 of the metal half-shell 1. The droplet guide cutout 24 is arranged roughly in the middle of the contact portion 23 of the lead-in 16. The drop-like guide cut-out 24, which is arranged in a mirror-image relationship to each other, forms a predominantly circular opening with a lower gradual transition when both contact portions of the rods 10, 11 contact. The droplet guide cutout 24 has no sharp edges and the transitions 28 between the guide cutout 24 and the contact portions 23 of the lead-in 16 are rounded.

This bead heald 18 is suitable for bead weaving polypropylene fibers. In the case of beaded weaving of polypropylene fibers, an extreme tension has arisen during processing on a weaving machine, and it has commonly happened that the hinge feet 12, 13 have cracked at the same thickness with the arms 14, 15 of the draw bars 10, 11 and thus the binder ceases to function.

Example 3 (Figs. 19-21)

Both the function and the embodiment of the bead heald 18 shown in FIG. 19 is identical to the previous embodiment, except for the triangular guide cutout 25 of the draw bars 10, U. In this case, the triangular guide cutout 25 (FIGS. 20, 21) is shaped like an isosceles triangle so that the angle between the two identical guide edges 26, 27. an upper guide edge 26 facing the contact portion of the portion 23 below the upper arm 14 and a lower guide edge 27 facing the contact portion 23 above the lower

Λ / the arm 15 is a right angle 90. The two guide edges 26, 27 have the same length. By contacting the two mirrored triangular guide slits 25 of the draw bars 10, 11, a regular diamond with equally long sides is formed. A bead heald 18 of this type is suitable for weaving fine fibers with the tex number 34 or less.

Example 4 (Figs. 22-24)

The embodiment of the bead heald 18 shown in FIG. 22 in this alternative embodiment is identical to the preceding exemplary embodiment except for the triangular guide cutout 29 of the drawbar healds 10, 11, which is shaped to an irregular triangle (FIGS. 23, 24) so that the angle between the two guide edges 26, 27 and the upper guide edge 26 facing the contact portion 23 towards the leading edge 20 and the lower guide edge 27 facing the contact portion 23 of the lower arm 15 is sharp

A f less than 90 degrees. The two guide edges 26, 27 have different lengths. The upper guide edge 26 is shorter than the lower edge 27. Upon contact of the two triangular guide slits 25 arranged in mirror-image relationship to each other, a regular rhomboid is formed with equally long opposite sides. This bead heald solution is suitable for textured fibers.

The exemplary embodiments do not limit other variants and possibilities of the bead heald 18, and in particular the shaping of the guide slits 21, 24, 25, 29 within the scope and spirit of the claims of the present invention.

Industrial usability

The solution is intended for binding of beaded fabrics and their derivates, including tying of regions in the production of common fabrics on pneumatic, needle and twine weaving machines.

h

1. Bead heald, comprising a metal half-hearth with an eyelet and a draw heald of plastic;

Claims (14)

the cushion is formed by two arms connected by a bridge to the end eyelet and terminated by a suspension guide on the outer sides of the arms, while the drawbar is formed by a pair of lifting rods, each of which has end hinged feet connected to the arms , under which a contact portion is situated, characterized in that each rod (10, 11) has a guide cut-out (21, 24, 25, 29) in the contact portion (23) of the inlet (20), into which a through bore leads (17) of the lead-in (16) and whose lower part facing the lower arm (15) of the drawbar (10, 11) forms the lead-in stop (22), the guide notch (21) of the right drawbar (10) following the guide notch ( 21) the left drawbar (11) of the traction heald (9). n Bead heald according to claim 1, characterized in that the guide cut-out (21) of the two rods (10, 11) is semicircular. Bead heald according to a suitable combination of claims 1 and 2, characterized in that each drawbar (10, 11) of the tractive heald (9) has each of its hinge feet (12, 13) shaped into a C-shaped hinge (19) with rounded extended ending. n Bead heald according to claim 1, characterized in that each guide cut-out (24) of the two rods (10, 11) has a drop shape. n Bead heald according to claim 4, characterized in that the droplet guide slot (24) has a semicircular shape with a gradual transition between the stop (22) and the contact portion (23) of the lower arm (15). n Bead heald according to claim 1, characterized in that each guide cut-out (25, 29) of the two rods (10, 11) is triangular. n Bead heald according to claim 6, characterized in that the triangular guide cut-out (25, 29) has, between the upper guide edge (26) facing the leading edge (20) and the lower guide edge (27) facing the lower arm (15). right angle. 8th Bead heald according to claim 6, characterized in that the triangular guide slot and the lower guide edge (27) facing the lower arm (15) are at an acute angle. (25, 29) has an upper leading edge (26) facing the leading edge (20) of the leading edge (20). Bead heald according to claim 6, characterized in that the triangular guide slot (25) has an upper guide edge (26) facing the upper arm (14) of the drawbar (10, 11) of the same length as the lower guide edge (27) facing to the lower arm (15) of the drawbar (10, 11), Bead heald according to claim 6, characterized in that the triangular guide slot (29) has an upper guide edge (26) facing the upper arm (14) of the drawbar (10, 11) shorter than the lower guide edge (27) facing the the lower arm (15) of the drawbar (10, 11). Bead heald according to claim 4 or 6, characterized in that the passages (28) between the guide slot (24, 25, 29) and adjacent contact parts (23) and any transitions between the guide edges (26, 27) or the stop ( 22) of the guide slot (24, 25, 29) are rounded. and Bead heald according to claim 1, characterized in that the upper hinge foot (12) and / or the lower hinge foot (13) have a thickness relative to the upper arm (14) or lower arm (15) of the draw bars (10, 11). times to three times larger. Bead heald according to a suitable combination of claims 1 to 5 or 6 to 12, characterized in that the two lifting rods (10, 11) of the tractive heald (9) are made of polyoxymethylene - POM. the cushion consists of two arms connected by a bridge with an end eyelet and terminated by a suspension guide on the outside of the arms, the drawbar being formed by a pair of lifting rods, each of which has end hinging feet adjoining the arms with a lead and a leading edge a contact portion, characterized in that each suspension guide (6) of the arms (2, 3) of the metal half-shell (1) has a break (7, 8) in the lower outer part. · · • · · • · • • · • • · • · • ···· • · · • • • · ···· • · · ·· e ·· · Fig. 5 Fig. 4 Fig. 6 I ·· Λ · • • ·· • · · · • • · · • · • • • * · ···· • · • · · _ * • · • • • • ···· • • • · ·· · · · ·· · λ Fig. 3 Fig. 7 • · e · · · · · · ···· · · ····· ·· ·, ··. • ···· · · j • ·· • • · · • · • · • · • • · • • • ....... • ·· · · · · · Fig. 14 · ♦ ♦ • · · · · • • • • • • • · • • • ·· • • · · · · · Fig. 24 Fig. 21