CZ7917U1 - Leno heddle - Google Patents

Description

Lined heald

Technical field

The invention relates to a leno heald according to the preamble of claim 1 for the protection of the invention.

BACKGROUND OF THE INVENTION

Currently, two methods of weaving leno fabrics are used, the so-called fixed weaving loom and leno healds. During the basic movements of the weaving machine, a leno weave is formed. The method of binding the leno fabrics is carried out by a pair of leno healds arranged opposite one another, each of the leno healds being formed by a plastic pull heald with a pair of lifting rods and a metal halfworm.

A heddle heald is described, for example, in Swiss Patent No. 579,161 and in U.S. Patent No. 5,728,178. 3,990,481. Its metal half-wall has the same thickness over its entire length of the shoulders, bridge, eyelet and suspension guide. The suspension guide is formed as a longitudinal closed eye from the outside of each arm. The metal material of the half-wall guarantees its good function and durability. The eye of the metal half-wall has an optimal shape for guiding one of the warp threads.

In the case of a closed half-wall arm suspension guide, a perfect hinge of the metal half-wall is provided in the support element of the slat. In normal operation, however, occasionally the plastic rod is damaged, which must then be replaced under operating conditions, and the closed hinge guide of the half-wall arm prevents the rod from being replaced.

The essence of the technical solution

These disadvantages are overcome or substantially reduced in a leno heald comprising a metal half-bullet with a loop and a drawstring of plastic. The heald is formed by a pair of lifting rods, each of which has end hinge feet adjoining the arms between which there is a haunch. The half-foam consists of two arms connected by a bridge to the eye and terminated by a suspension guide on the outside of the arms according to this technical solution. The essence of this technical solution consists in that each suspension guide of the half-wall has a break in the lower outer part. This new embodiment of the metal half-wall can also be used for the above-mentioned plastic drawing heald according to this technical solution.

The main advantage of interrupting the suspension half of the metal half-wall is to make it easier to replace the damaged part of the plastic drawing-through, in which the metal half-wall can be re-inserted into the heald shaft after interruption.

BRIEF DESCRIPTION OF THE DRAWINGS

The technical solution is described below in an exemplary embodiment, which is illustrated in the accompanying schematic drawings, in which FIG. 1 is a front elevation of a metal half-purse; FIG. 2 is a side elevational view of FIG. 1; Fig. 5 is a side elevation of Fig. 3 from the leading edge of the haunch, Fig. 6 is a side elevation of Fig. 3 from the outside of the lift rod, Fig. 7 is a front view of the complete leno heald. Fig. 9 is a detail view of the upper hinge foot of the right linkage,

Fig. 10 is a detail of the lower hinge foot of the left linkage; Fig. 11 is a detail of the lower hinge foot of the right linkage;

Examples of technical solution

Tweezer-shaped metal half-board 1 (FIG. 1) made of 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 outside eyelet 5. Each arm 2 3 has at its free end an outside guide 6 arranged in the form of a longitudinal eye. Each suspension guide 6 is provided at its outer lower end with an interruption 7, 8 in the form of a narrow gap. If the suspension guide 6 of the arms 2, 3 of the metal half-wall I is massive, the gap or gap of the interruption 7, 8 can be replaced by a cut-out. The metal half-wall 1 is formed as a whole and has the same thickness over its entire length (FIG. 2).

A heald 9 (Fig. 3) consisting of two lifting rods 10, 11, a right rod 10 and a left rod U · Each lifting rod 10, 11 (Figs. 3, 4, 5, 6) consists of an upper hinge foot 12 at both ends. and on the opposite side from the lower hinge foot 13. The upper hinge foot 12 extends from the upper arm 14. The lower hanger foot 13 extends from the lower arm 15. Right and left lifting rods JO, JJ. have their upper arms 14 spaced apart and widened because they are subjected to greater stress than the two lower arms 15, which are narrower. The lower arms 15 serve as a guide for the lifting rods 10, 11. and therefore can be relatively thin. Roughly in the middle of the lifting rod 10 between the two arms 14, 15 is an enlarged part of the ramp 16 with a guide hole 17. From the side views of the lifting rod 10 (Figs. 5, 6) it is clear that the lifting right rod 10 has the same thickness except the middle part of the haunch 16, which has the greatest thickness, since the middle part is subjected to the maximum load during operation or at the stop of the metal half-wall and the lining heald 18. Each pull rod 9, 11 is formed as a single plastic unit of polyoxymethylene, for example made by injection molding technology.

The basic functional parts, the metal half-worm J and the lifting rods 10, 11 of the heald 9 (FIG. 7) represent the complete arrangement of the leno heald J8.

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

Each lead 16 (FIGS. 12, 13) of the tie 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 cutout 21 for guiding the other warp thread. The lower portion of the guide slot 20 forms a stop 22, which is a bearing surface for the eyelet 5 with the bridge 4 of the metal half-wall J. The guide slot 2 is arranged roughly in the middle of the contact edge 23 of the lead. rods 10, JJ. forms a circular opening. The warp thread guide hole 17 (FIGS. 5, 7) is shaped from the side view of the hoist rod 10 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 the leading The guide hole 17 of this long deep groove extends from the outside of the right-hand tie rod 10 (FIG. 6) only as a connecting groove in the region of the lower part of the inlet 16 corresponding roughly to the area adjacent to the stressed guide slot 2J with the stop 22 Similarly, the left rod JJ is shaped. The healds 9 are located below the run-in J6. the tension healds 9 are arranged side by side so that their adjacent side edges shift one after the other during the stroke.

Into the guide opening 7 of the guide cutout 20 of the two lifting rods 11, 11, a metal half-wall J is inserted above the point of contact thereof, so that one eyelet 5 is inserted in each drawing-head 9. healds 9, and in the gap between the upper arms J4 of both rods 10, 11. it can move freely up and down. If one of the two healds 9 is raised, the half-wall J.

-2GB 7917 Ul

The basic principle of weaving of leno fabrics is a system of warp and weft threads. The warp yarn guidance is carried out by guiding one of the two warp yarns into the loop 5 of the metal half-wall I and then loosely between the respective pairs of the healds 10, 11 of the heald 9 to guide the other of the warp yarns. Friction threads 18 with a guide semicircular guide cut-out 21 and a stop 22 reduce this friction, especially in the area of the lead-in 16, since the thread or thread is in contact with the metal 5 Due to the shape of the guide slot 21 with the stop 22, the contact portion 23 of the leading edge 20 and the chosen plastics material, this most stressed part of the two lifting rods 10, 11 of the pulling heald 9 is more mechanically resistant and extends its service life. In the absence of this guide cut-out 21, in which the warp yarns were in direct contact with the plastic part, considerable edge burring, cutting through the edges and damage to the contact points of the plastic of the leading-in 16 and the thread or thread occurred.

The weaving healds 18 are hinged in the weaving blade by means of the hinged feet 12, 13. During the weaving itself, the shackle leaves 12 are replaced, and the two hinged feet 12, 13 are relatively stressed. is reduced due to the extended hinge 19 of the hinge feet 12, 13 and the rounding of the hinge 19. When replacing damaged hitches 10, 11 of the heald 9 used to date, their hinge feet 12, 13 were frequently broken. measures.

With existing weaving, for example, 500 weaving healds 18 arranged in a weave in the weaving machine, normal wear of the individual weaving healds 18, as well as extreme wear of e.g. Up to now, when replacing very damaged plastic lifting rods 10, 11, the metal halfworm 1 has first been destroyed by cutting off its suspension guide 6, and the metal halfworm 1 has been removed from the sheet and then the damaged plastic lifting rods 10, 11 of the heald 9 have been removed. By splitting the suspension guide 6, the entire metal half-wall 1 has been destroyed. The new proposed technical solution of the metal half-wall 1 with the interruption 7, 8 of the suspension guide 6 makes it possible to remove the damaged plastic drawing heald 9 without any damage and without its destruction, and the metal half-wall 1 s is possible after replacing the plastic lifting rods. by interruption 7, 8 of the suspension guide 6 to be reused in the new leno heald 18.

The present metal half-wall 1 can be used for any other suitable type of plastic drawing heald 9, provided the functional formation of the leno heald 18 as a whole is a condition.

The exemplary embodiment does not limit the further possibilities of realizing the leno heald within the scope and spirit of the claims of the present invention.

Industrial applicability

The solution is intended for weaving of leno fabrics and their derivatives, including lacing of regions in the production of conventional fabrics, on pneumatic, needle and crepe weaving machines.

Claims (1)

PROTECTION REQUIREMENTS A lining heald, comprising a metal half-wall with a loop and a drawstring of plastic, the half-wall comprising two legs connected by a bridge to the loop and terminated by a suspension 5, the guide heald being formed by a pair of lifting rods, each having end hinge feet adjoining the shoulders between which there is a haunch, characterized in that each hinge guide (6) of the arms (2, 3) is metal The half-wafers (1) have breaks (7, 8) in the lower outer part.