EP2703531A1 - Weaving shuttle and weaving method - Google Patents

Abstract

The shuttle has a weft coil and a thread eyelet (14) movably guided relative to the shuttle proportionately parallel to a movement direction (17) of the shuttle below and/or above warp threads. Thread compensation parts i.e. rewinding weft coils, are arranged in or at the shuttle. The thread eyelet is movably held on an arc portion of the shuttle along the movement direction of the shuttle in a loom. A shuttle upper part (18) is movably held in or at a shuttle base part along the movement direction of the shuttle. An independent claim is also included for a weaving method.

Description

The invention relates to a weaver for a loom, in particular for a Schützenbandwebmachine, with a firing spool and a thread eye and a weaving method with such a shuttle.

In the production of woven textiles, a crossing of longitudinal (warp) and transverse threads (weft) is always carried out. For this purpose, a part of the warp threads is raised and lowered another part of the warp threads. Through the resulting gap of the weft thread, perpendicular to the warp threads, passed. By lowering the upper warp threads and lifting the lower warp threads of the registered weft thread is included between the warp threads. By repeated repetition of the process creates a tissue. When lifting or lowering the warp threads, the so-called shed in the area between the warp threads must be free of machine elements. Entry devices for the weft yarn must therefore be completely removed from the shed for each tray change.

For example, in shooter web weaving, this process is solved by moving a so-called web contactor from left to right or vice versa through the shed. The weft thread is stored in the shuttle on the firing spool and exits the thread eye from the shuttle. The shuttle is driven by means of laterally arranged next to the shed drive elements. The shooter is usually guided in sliding guides, which are arranged to the left and right of the shed. The weaver himself is longer than the one to be overcome Gap and thus when crossing the gap - during the so-called weft insertion - always, at least in one, the left and right of the gap arranged guides, in engagement. Usual is a shooter length which is 2.5 times the gap width. Alternatively, the shooter is passed by transfer grippers through the shed.

The traverse path of the shuttle consists of the shooter length in approach position, safety distance to the shed, shed width, exit-side safety distance to shed, length of shooter in end position. A free thread length must be compensated in the first half of the weft insertion. Free weft lengths result from the movement of the shooter towards the tissue. In this case, the distance between the thread eye and the binding point of the weft thread in the fabric already produced is reduced. The free thread length is calculated in a simplified manner from the sum of half the length of the shuttle shooter and the one-sided safety distance of the shuttle from the shed.

The thread lengths which are released during the first half of the picking movement are usually no longer wound up on the weft bobbin, but are stored in the shuttle by means of compensating springs.

The object of the invention is to improve the weaving method or machine parts of the weaving machine, so that tapes can be woven as economically as possible with good quality.

This object is achieved by a shuttle with the characterizing features of claim 1 and by a loom claim 9 and a weaving method according to claim 10.

Advantageous embodiments are specified in the respective subclaims.

A weaver according to the invention has at least one movable element in relation to the other weaver, whose components are usually arranged stationarily on the shuttle. The movability according to the invention is oriented at least partially parallel to the direction of movement of the shuttle under or over the warp threads by means of at least one appropriately designed guide or bearing. A weaving method according to the invention uses such a weaver.

If the weft yarn to compensate for increasing shed widths to a greater extent and release again, this automatism is repealed by the invention, because the weaver according to the invention can align depending on the location with its movable elements so the shed out that the free thread length is shortened. Damage to the weft yarn by abrasion on rigid thread eyes or elements of the Kompesationseinrichtung be reduced. If for too long free thread lengths would no longer be compensated, the invention still allows a further development, since initially free weft length is saved. Undefined thread tension and knot formation or thread breakage can be reduced or occur less frequently. Undefined thread tensions cause irregular fabric edges. Thread compensation requires a lot of space on the shuttle. Thus, simplified shuttle can be constructed if less expensive compensation devices can be used as a result of the invention.

According to an advantageous embodiment of the shuttle according to the invention a shooter base and a rifle upper part are executed. In particular, the rifle upper part is movable relative to the wider rifle base.

According to a further advantageous embodiment of the shuttle according to the invention is a thread compensation device in or on the shuttle arranged, in particular a rewinding shot coil. In particular, because of the invention can be completely dispensed with thread compensation devices or meet the mobility of the elements of the weaver of the function of Fadenkompenasationseinrichtung. However, particularly advantageous embodiments have both a movable element and a thread compensation device. Known systems with self-rewinding weft coils partially come into consideration as a success of the invention, as soon as the free thread length could be reduced.

According to a further advantageous embodiment of the weaver according to the invention, the thread eye, along the direction of movement of the shuttle in the loom, movably received in the shuttle, in particular on a curved portion movable.

The exit point of the weft thread is thus no longer fixed on the shuttle, but can follow the rolling position of the current weft thread on the shuttle and, secondly, the position of the shuttle in the tissue. Particularly advantageously, the movable element is selectively braked or driven.

According to a further advantageous embodiment of the shuttle according to the invention, the rifle upper part, along the direction of movement of the shuttle in the loom, is movably received on or in the rifle base.

According to a further advantageous embodiment of the shuttle according to the invention, the shuttle, in particular with its axis of rotation, is guided tangentially to the curved section according to one of the aforementioned advantageous embodiments in the shuttle.

It is of additional advantage if in this way the origin of the weft thread free laying thread length can be laid is. In particular, the tangential guide allows alignment of the thread the exit angle of the weft thread from the thread eye approximated.

According to a further advantageous embodiment of the shuttle according to the invention, the shuttle with respect to the shuttle is stationary mounted with oscillating axis of rotation.

According to a further advantageous embodiment of the shuttle according to the invention, the thread eye is arranged rotatable about an axis oriented at least roughly in the warp direction in a thread eye carriage.

By these measures, the weft less rubs in his guides.

A loom according to the invention is equipped with at least one such shuttle.

A weaving method according to the invention uses such a shuttle.

According to an advantageous embodiment of the weaving method according to the invention for a woven fabric of warp threads and weft threads, the at least one movement of the at least one movable element of the weaver is guided relative to the other weaver, in particular from an entrance layer facing the warp threads on the input side opposite to the direction of movement of the weaver under or over the web Warp threads through to the warp threads on the outlet side facing outlet layer.

According to a further advantageous embodiment of the weaving method according to the invention, the at least one movement of the at least one element movably guided in the shuttle is electromechanically driven or braked. The invention will be explained in more detail with two exemplary embodiments, which are illustrated in FIGS. The same components are the embodiments overarching provided with the same reference numerals. Not all figures are all reference numerals in order to give a better overview.

Fig. 1

ein Schützenoberteil eines erfindungsgemäßen Webschützen gemäß einem ersten Ausführungsbeispiel in einer Seitanansicht mit einem Fadenaugenschlitten in waagerechter Führung,

Fig. 2

das Schützenoberteil aus Fig. 1 in einer perspektivischen Darstellung,

Fig. 3

den Schützenaugenschlitten aus Fig. 1 im Schnitt entlang einer Rotationsachse durch das Zentrum des Fadenauges,

Fig. 4

einen erfindungsgemäßen Webschützen gemäß einem zweiten Ausführungsbeispiel in einer perspektivischen Ansicht mit bogenförmiger Führung für das Fadenauge,

Fig. 5

eine schematisierte Darstellung eines erfindungsgemäßen Webschützen gemäß einem dritten Ausführungsbeispiel mit einer bewegbaren Schussspule in einer mittleren Stellung,

Fig. 6

eine weitere schematisierte Darstellung des Webschützen aus Fig. 5 mit der Schussspule in einer Eintrittsstellung und

Fig. 7

eine weitere schematisierte Darstellung des Webschützen aus Figur 5 mit der Schusspule in einer Austrittsstellung.

Show it:

Fig. 1

a rifle upper part of a shuttle according to the invention according to a first embodiment in a Seitanansicht with a thread eye carriage in a horizontal guide,

Fig. 2

the rifle shell from Fig. 1 in a perspective view,

Fig. 3

the rifleman's sled Fig. 1 in section along a rotation axis through the center of the thread eye,

Fig. 4

a weaver according to the invention according to a second embodiment in a perspective view with arcuate guide for the thread eye,

Fig. 5

1 is a schematic representation of a shuttle according to a third embodiment with a movable shuttle in a middle position,

Fig. 6

another schematic representation of the Web shooter Fig. 5 with the firing coil in an entry position and

Fig. 7

another schematic representation of the Web shooter FIG. 5 with the firing coil in an exit position.

The FIGS. 1 to 3 show extracts a first embodiment of a shuttle 10 according to the invention with straight, horizontal guide 19 for a thread eye carriage 15 with a vertically oriented in a basic position thread eye 14. The shuttle 10 has a more classic

Structure with fixedly connected to each other shooter base (not shown) and Schützenoberteil 18, wherein the guide 19 is carried out in the rifling upper part 18. The shuttle 10 has in the fabric, not shown, during a method according to the invention a direction of movement 17 transverse to warp threads through a shed. The guide 19 is aligned parallel to the direction of movement, so that the thread eye run along or can run or can be delayed against the direction of movement.

Below the guide 19 is a shot coil 12, which stores the weft thread (not shown here). The firing spool 12 has an axis of rotation 12.A oriented parallel to the direction of movement 17 and is rotatably mounted in the upper part of the rifle 18. The weft coil 12 can be braked by means of a spring plate 13, so that the weft thread is not unwound uncontrolled.

The shooter base and / or the rifle shell 18 takes often (not shown here) between thread eye 14 and firing coil 12 a thread compensation device, such as springs with eyelets at its free end. The elements of the known thread compensation devices, however, are not in the sense of the invention to be movable against the web-shooter 10. They do not leave at least one point fixed in the shuttle 10, no matter what happens in the weaving process. The mobility of the invention movable elements of the shuttle 10, here the thread eye 14, is characterized in that the element completely leaves its position relative to the shuttle, therefore no longer remains firmly connected to the shuttle at any point. Thus, the thread eye 14 is performed according to the first embodiment as a whole linear.

In Fig. 4 is an inventive Webschütze 10 'according to a second embodiment with a linear on the shooter base 16' mounted Schützenoberteil 18 'shown. The thread eye 14 'is not rotatably guided in an arcuate guide along an arc portion 11'. A passage opening for the weft thread (not shown) through the thread eye 14 'thus has a directed onto the firing coil 12 through passage axis without the thread eye 14' is rotatable in the guide.

In the FIGS. 5 to 7 There is no schematic illustration of a third embodiment of a shuttle 10 "according to the invention, and a movable firing spool 12" with a weft thread 20 is shown inside the shuttle 10 "The movement during the weaving process according to the invention is recorded in three illustrations : Roughly along the direction of movement 17 of the shuttle 10 "following an arcuate path, the shuttle 12" leaves an entry position (FIG. Fig. 6 ) over a middle position ( Fig. 5 ) into an exit position ( Fig. 7 ). The third embodiment can also be understood as a supplement to the second embodiment.

Upon entering the shed the movable elements of the shuttle are therefore all facing the shed. This does not always have to be optimal as far as the deflection angle of the weft thread 20 is concerned. Therefore, the invention also includes method variants in which not all movable elements - if there are several - are positioned facing the shed when entering. At the exit ( Fig. 7 ), the movable elements face the warp yarns of the shed on the exit side. The movable elements thus follow the weaver through the shed but at least in sections move against the direction of movement of the shuttle on or in the shuttle.

Depending on the position, the axis of rotation 12.A "of the firing coil 12" runs tangentially to the curved section in which the thread eye 14 "runs, so that the axis of rotation 12.A" is no longer necessarily aligned parallel to the direction of movement 17.

LIST OF REFERENCE NUMBERS

10, 10 ', 10 "

Webschütze

11 '

arc section

12, 12 "

quill

12.A, 12.A '

axis of rotation

13

spring plate

14, 14 '

thread eye

14.A

axis of rotation

15

Thread eyes slide

16 '

Protect base

17

movement direction

18, 18 '

Protect shell

19

guide

20

weft

Claims (12)

Web contactors (10) for a loom, in particular for a Schützenbandwebmachine, with a Schussspule (12) and a thread eye (14), characterized in that at least one movable element (12, 14) of the weaver (10) against the other weavers (10 ), at least partially parallel to the direction of movement (17) of the weaver (10) under or over warp threads, is movably guided. Web contactors (10) according to claim 1, characterized in that a shooter lower part (16) and a rifle upper part (18) is executed. Web contactor (10) according to one of claims 1 or 2, characterized in that a thread compensation device is arranged in or on the shuttle (10), in particular a rewinding shot coil. Web contactor (10) according to one of the preceding claims, characterized in that the thread eye (14), along the direction of movement (17) of the shuttle (10) in the weaving machine, is movably received in the shuttle (10), in particular on an arc section ( 11) movable. Web contactors (10) according to any one of claims 2 to 4, characterized in that the rifle upper part (18), along the direction of movement (17) of the shuttle (10) in the loom, is movably received on or in the shooter base (16). Web contactor (10) according to one of the preceding claims, characterized in that the firing spool (12), in particular with its axis of rotation (12.A) is guided tangentially to the curved portion according to claim 4, in the shuttle (10). Web contactor (10) according to any one of the preceding claims, characterized in that the weft coil (12) is mounted with respect to the shuttle (10) fixed with oscillating axis of rotation. Web contactor (10) according to one of the preceding claims, characterized in that the thread eye (14) is arranged rotatable about an axis (14.A) aligned at least roughly in the warp direction in a thread eye carriage (15). Weaving machine with a shuttle (10) according to one of the preceding claims. A weaving method using a shuttle (10) according to any one of claims 1 to 8. Weaving method according to claim 10 for a fabric of warp threads and weft threads (20), characterized in that the at least one movement of the at least one movable element (12, 14) of the weaver (10) is guided relative to the other weaver (10), in particular an inlet layer facing the warp threads on the inlet side opposite to the direction of movement (17) of the shuttle (10) under or over the warp threads and into an exit layer facing the warp threads on the exit side. Weaving method according to one of claims 10 or 11, characterized in that the at least one movement of the at least one in the weaver (10) movably guided element (12, 14) is driven electromechanically.

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