EP2804971A2

EP2804971A2 - Web machine with a device for forming additional weft effects

Info

Publication number: EP2804971A2
Application number: EP12810167.2A
Authority: EP
Inventors: Herbert Mueller; Harald Prantl; Gerhard Boegl
Original assignee: Lindauer Dornier GmbH
Current assignee: Lindauer Dornier GmbH
Priority date: 2012-01-20
Filing date: 2012-12-12
Publication date: 2014-11-26
Also published as: DE102012200835B3; WO2013107571A2; CN104040055A; JP2015507707A; WO2013107571A3

Abstract

The invention relates to a web machine (1) with a device for forming additional weft effects (3), comprising multiple guide needles (4) and multiple needle guides (5), in each of which a guide needle (4) is mounted in a vertically movable manner. Furthermore, a slide (6) is provided which is connected to at least one of the needle guides (5), and a slide drive (7) is provided by means of which the slide (6) can be driven in the weft direction (8). The device further has a shedding device (9) and multiple cords (10) which can be driven vertically by the shedding device (9). The cords (10) are connected to the guide needles (4) such that the guide needles (4) can be raised by the cords (10). The invention is characterized in that each guide needle (4) is connected to a respective cord (10).

Description

Weaving machine with a device for forming additional shot effects. Technical field

The present invention relates to a weaving machine with a device for forming additional shot effects.

State of the art

In weaving machines, it is known in the prior art to include additional threads extending in the warp direction in such a way to the weave that certain additional impact effects (embroidery or Brochiereffekte) are achieved. For this purpose, these effect threads are prior to the entry of a weft thread for different cycles of movement of the loom in the weft direction in

brought different positions.

Such a loom, for example, shows the device according to

US 566551. This discloses a loom with a shedding device for driving strings, by the movement of a support beam with guide needles for embroidery threads in the direction of the compartment opening of the loom - that is vertical - is movable up and down. Raising and lowering of the support beam via a pair of stringer attacking cords, which with the

Shedding device are connected.

Furthermore, a slide is present, which has bores which serve for the vertical guidance of the needles. The slide can be driven by a displacement drive in the weft direction. Due to the shedding device, the cords and the support beams, several guide needles are simultaneously in the same

Direction vertically movable.

Also, US 4,429,722 A and JP 54-1 1366 disclose devices for forming added shot effects with groups of guide needles that are vertically movable from a common support frame.

Such a device of this type is also shown in DE 10 2010 007 048 A1. This discloses the rest, a slider which is fixed to the front of a shaft frame and is driven freely programmable in the weft direction with a linear motor. Object of the present invention is to provide a loom with a device with which a plurality of guide needles for forming additional impact effects are vertically movable independently. Description of the invention

The object is achieved by a loom with a device according to the independent claim.

This weaving machine has a device for forming additional weft effects with a plurality of guide needles. The device comprises several

Needle guides, in each of which a guide needle is mounted vertically displaceable. In addition, a slider is present, with at least one of

Needle guides is connected. By a displacement drive, the slider is driven in the weft direction.

For example, it is possible to connect multiple needle guides to a single slider; but it can also be several independent in

Shooting direction drivable slide be present, which are in each case with only one needle guide or with different groups of needle guides in combination.

Furthermore, the weaving machine has a shed forming device with several

Lacing up, which are driven vertically by the shedding device. This can be, for example, a jacquard machine already known to the person skilled in the art, in which harness cords are raised and lowered in pattern-controlled manner in successive cycles of movement of the weaving machine. The guide needles are connected to the strings in such a way that the guide needles can be raised via the cords. The invention is characterized in that each

Guide needle is connected with one string each.

As cords in the context of the present invention, such transmission elements between shedding device and guide pins are called, which can transmit tensile forces and allow lateral displacement of the elements to be driven. With such elements forces can be exerted on the guide pins, by which they are raised and it can be compensated for displacements of the guide pins in the weft direction. For example, monofilaments, thin wires or similar elements can be used. When the strings are lowered by the shedding device, the guide needles at least fall down due to their own weight.

With the described device can be any guide needle for a

Independently of the other guide needles or effect threads, lift or lower the effect thread in a pattern-controlled manner. The user of such a machine is no longer limited to weaving the same pattern across the entire width of a group of guide needles, as each needle can be controlled individually vertically. Particularly advantageous is an embodiment of the loom according to the invention, in which each guide needle is associated with a restoring element which exerts a restoring force on the guide needle, which counteracts the lifting. By this restoring force, the guide needle is moved down when the cord connected to the guide needle is no longer raised by the shedding device, but lowered. This restoring element can be of the type that energy is thereby stored when lifting the guide needle, which is released again when lowering. This higher working frequencies of the device described can be realized.

Such a return element may e.g. a mechanical or pneumatic spring, which is stretched when lifting and relaxed when lowering. However, it may also be provided an additional weight, which increases the weight of the guide needle.

In principle, devices are also conceivable with which the guide needles can be moved downwards again via further transmission elements used between the needle and shedding device, which are used only for the counter-movement.

In a further embodiment, a sleeve is provided as a needle guide, the upper end of which is fastened to the slider. In this way, a mechanically precise guidance of the respective guide needle over the length of the sleeve is possible. At the same time the sleeve is positioned together with the guide needle when moving the slider in the weft direction. With sleeve is presently referred to a tubular or rectangular guide member having openings or passages for the guide needle or the cord at the top and bottom of its longitudinal extent. The arrangement of the return element within such a sleeve leads to a further compact embodiment of the weaving machine according to the invention.

The whole device is exposed to the weaving machine usually fiber fly or other contaminants. For this case, it is expedient to completely close the sleeve except for the openings or passages described above.

According to a further embodiment, a particularly compact and simple structure results from the fact that the slider has bores through which the cords are guided. A particularly favorable embodiment of the weaving machine according to the invention results when a reed is present, the reed teeth form unilaterally open at the top Rietlücken. Thus, the guide needles can be arranged such that when raising or lowering the guide needles the effect threads in the Rietlücken or dive. This way you can add extra

Measures for the management of weft insertion elements - like the

No. 5,665,551 describes avoiding and even weaving machines with pneumatic weft insertion are possible, in which the weft thread is introduced into a reed channel.

In looms according to the prior art, the supply reels for the effect threads are usually arranged in the rear region of the weaving machine. in the

In connection with the arrangements mentioned here, further advantages can result from an arrangement of a thread supply and a thread monitor for the effect threads on the weaving machine in the front region, ie before the cords; For example, in the area above the reed or above the front of the loom loom, which is also easily accessible to the operator.

A particularly simple construction of the weaving machine according to the invention results, for example, from the fact that for the control of the guide needles with the

Effect threads a shedding machine - e.g. a Jacquard machine - is used, which is also set up for the shedding of the ground warp threads.

Due to the pattern-controlled raising and lowering of base warp threads and effect threads by means of the shedding machine, a weaving shed is formed in each movement cycle of the weaving machine into which a weft thread is inserted can. For example, the bond patterns of the additive weft effects may be given electronically or mechanically to the shed machine along with the weave patterns for the base warp yarns. The matching positions of the effect threads in the weft direction are predetermined according to the displacement drive.

However, cases are also conceivable in which the total capacity is e.g. a jacquard machine is required for the patterning of the ground warp threads. In these cases, it is advantageous if, in addition to the shedding device for the control of the guide needles with the effect threads also another shedding device is provided, which is set up only for the shedding of the base warp threads.

The shedding device for the control of the guide needles with the

Effect threads can be smaller in this case. For example, a name jacquard machine may be used which is mounted in front of the harness cords of the jacquard machine for the base warp yarns above the reed. Of course, it is also conceivable to use a shank or eccentric machine for shedding the base warp threads by means of shafts (as for example in DE 10 2010 007 048 A1) and a name jacquard machine for shedding the effect threads with vertical control of each effect thread independently of the other effect threads.

Several effect threads are usually attached to a common slider, so that the positioning in the weft direction for all effect threads of a group takes place together. Of course, several can

According to the invention, slides each having a single guide needle or a group of guide needles in the warp direction are attached to the weaving loom in succession.

Brief Description of the Drawings FIG. 1 Schematic representation of an embodiment of the invention

inventive weaving machine in section,

FIG. 2 shows view AA of the weaving machine according to FIG. 1, FIG. 3 shows a detail of the embodiment according to FIGS. 1 and 2,

FIG. 4 shows an example of additional firing effects in a tissue. Advantageous embodiments of the invention

Figures 1 and 2 show an embodiment of the invention

Weaving machine 1 with a device for the formation of additional weft effects 3. The device comprises a shed forming device 9, which is designed in the manner of a jacquard machine known to those skilled in the art and which is arranged above the loom 1. As transmission elements a plurality of cords 10 are present, which lead from the shedding device 9 vertically downwards. Each of these cords 10 is connected at its lower end to a guide needle 4. The shed forming device 9 designed as a jacquard machine is equipped at its lower end with a plurality of hooks or fastening elements, not shown, to each of which one of the cords 10 is fastened with its upper end.

The shedding devices 9, which are mentioned here, are machines with which elements on the loom 1 for each cycle of movement of the loom 1 with respect to the shed in an upper or a lower position can be brought. This happens as a function of an electronically or mechanically predetermined weave pattern. With this arrangement, it becomes possible to bring each of the guide pins 4 into an upper or lower position independently of the other guide pins 4 with respect to the shed.

On the device, a plurality of needle guides 5 are still present, in each of which a guide needle 4 is mounted vertically displaceable. The needle guides 5 are formed in the present example as sleeves 12, whose upper end is connected to a slide 6. In the present case, two groups of guide needles 4 and needle guides 5 are provided, each associated with a common slide 6. Each of the two slides 6 is connected to a displacement drive 7, by which each of the slide 6 is driven independently of the other in the weft direction 8. In this way, the two groups of guide needles 4 can be brought independently of each other in the weft direction 8 in different positions on the loom 1.

Of course, the device can also be used only with a single slider 6 or with more than two slides 6 or groups of guide needles. 4 be equipped. That depends on what kind of bonus effect 3 is intended.

The lowering of the guide pins 4 is done in the embodiment of Figures 1 and 2 by means of return elements 1 1, each individual

Guiding needle 4 are assigned. These return elements 1 1 are of the type that a restoring force is exerted on the guide needle 4, which pushes them down when the associated cord 10 is moved by a downward movement of the associated hook of the jacquard machine 9 down.

Details of the return elements 1 1 according to the present embodiment is shown in FIG. 3.

It can be seen that each guide needles 4 is guided in each case in a sleeve 12 and connected at its upper end with the associated cord 10. The sleeve 12 is fixed to the underside of the respective slider 6. The slider 6 has holes 14 through which one of the cords 10 is passed from the upper end of the guide needle 4 to the underside of the jacquard machine 9. The sleeve 12 includes in the present example, a compression spring 13, the lower end, for example, via a spring plate with each guided in the sleeve 12

Guiding needle 4 is connected. The spring 13 is pressed together when the cord 10 is pulled upwards by the jacquard machine 9. In this case, the guide needle 4 is raised. The associated effect thread 18 is positioned in an upper position with respect to the shed.

The slider 6, the sleeve 13 and the element for linear guidance and support of the slider 6 are designed so that the linear guidance and support of the slider 6 is ensured and that in pulling force on the cord 10, a lifting of the slider 6 is prevented upwards , The sleeve 13 has in the present

Example, a collar, which absorbs the tensile forces. Of course, it is also conceivable interlocking overlapping profiles of the slider 6 and the element for linear guidance and support of the slider or other means familiar to the expert for these purposes, such as prismatic guides.

As soon as the jacquard machine 9 lowers one or more cords 10 according to the predetermined weave pattern, the respective spring 13 presses the associated one

Guide needle 4 down. As a result, this comes in relation to the shed in a lower position. Through the eyelets of the guide needles 4 are effect threads 18 out, which are not shown in the figure 2 and 3, however. After changing the position of the guide needle 4 in a lower position finds a weft insertion on the loom 1 by means of the weft insertion element 2 instead. In the present example, the weft insertion element 2 is a gripper bar which carries a thread clamp at the tip. The weft thread thus lies in the tissue above the effect threads 18, which have been brought into the lower position before the weft insertion.

The effect thread 18 is subtracted in the example according to Figures 1 and 2 of a thread supply 19 and a thread monitor 21 of the respective

Guiding needle 4 supplied. The arrangement and the range of motion of the

Slide 6 in the weft direction 8, and the design of the leadership of the slide 6 are made so that the supply of the effect threads 18 is not hindered by the slide 6 or its leadership. Each slider 6 is connected to a displacement drive 7. The displacement drives 7 are arranged in the present example on the right side of the loom 1. Only one of them is visible in FIG. The execution of the displacement drive 7 and its

Control takes place in the present example via a linear motor which is connected to the machine control, not shown. Such an arrangement is familiar to the person skilled in the art, e.g. from DE 10 2010 007 048 A1.

If the fabric pattern provides that one or more effect threads 18 in the next cycle of the weaving machine 1 in the weft direction 8 at another location below the weft thread to be inserted in the tissue to lie, all guide pins 4 are raised and the associated

Displacement drive 7 driven in the weft direction 8. The associated with the drive slide 6 and the associated group of guide pins 4 is placed in the weft direction 8 in the correct position and then those guide pins 4 are lowered by the jacquard 9 whose effect threads 18 are to be brought down according to weave pattern.

In the present embodiment, a reed 15 is provided, the reed teeth 16 form upwardly open Rietlücken 17. When lowering the effect threads 18 in a lower position, the effect threads 18 dive into the Rietlücken 17 a. This makes it possible to move the guide needles 4 in one plane, which lies behind the reed 15 in its rest position, during the weft insertion.

The weaving machine 1 according to the embodiment according to FIGS. 1 and 2 furthermore has shed forming elements 22 for the base warp threads 20. These shedding elements 22 are formed in a known manner by healds, which are connected at the upper end via harness cords with the hooks of the jacquard machine 9. The lower end of the healds is connected to tension springs, which pull the healds down when is lowered by the jacquard machine 9 of the respective hooks.

The upper position of the eyelets of the guide needles 4 is set so that the effect threads 18 in the displacement in the weft direction 8 above the

Base warp threads 20 are moved, which are in the upper position of the shed formed by the warp threads 20 shed. The base warp threads 20 are from a warp beam in the rear of the loom 1 via a

Warp thread monitor led into the area of the compartment picture elements for the base warp threads 20. The finished fabric is after the stop and setting the

Weft threads wound in the front region of the loom 1.

FIG. 4 shows a section of a fabric with additional weft effects 3, as can be produced with the loom 1 according to the invention. The

Additional firing effects 3 in this section are generated by three effect threads 18. Of these three effect threads 18, the two lying on the left in the tissue are connected to a first slider 6 and are positioned by this simultaneously in the weft direction 8. The third, located in the fabric right effect thread 18 is connected to a second slider 6 which is driven in relation to the first slider 6 in the opposite direction. The two leftward effect threads 18 show different auxiliary shot effects 3 from each other, since they are formed by guide needles 4 that have been moved vertically independently of each other. reference numeral

1 weaving machine

2 weft insertion element

3 extra shot effect

4 guide needle

5 needle guide

6 slides

7 displacement drive

8 weft direction

9 Shedding device

10 string

1 1 return element

12 sleeve

13 spring

14 hole

15 reed

16 reed teeth

17 Rietlücken

18 effect thread

19 thread stock

20 basic warp threads

21 thread monitor for effect threads

22 Shedding element for base warp threads

Claims

claims

1 . Weaving machine (1) with a device for the formation of additional weft effects (3) with a plurality of guide needles (4) and with a plurality of needle guides (5), in each of which a guide needle (4) is mounted vertically displaceable and with a slide (6), with at least one of the needle guides (5) is connected and with a displacement drive (7) through which the slide (6) in the weft direction (8) can be driven, and with a shedding device (9) and with a plurality of strings (10) through which Shedding device (9) are driven vertically and are connected to the guide needles (4) in such a way that on the cords (10) the guide needles (4) can be raised, characterized in that each

Guide needle (4) is connected to a respective cord (10).

2. Weaving machine according to claim 1, characterized in that each

Guide needle (4) is assigned a return element (1 1), which exerts a restoring force on the guide needle (4), which counteracts the lifting.

3. loom according to claim 1 or 2, characterized in that the needle guide (5) is designed as a sleeve (12) which is fixed to the slider (6).

4. loom according to claim 3, characterized in that the

Resetting element (1 1) within the sleeve (12) is arranged.

5. Weaving machine according to one of the preceding claims, characterized

characterized in that the return element (1 1) is designed as a spring (13).

6. Weaving machine according to one of the preceding claims, characterized

in that the slide (6) has bores (14) through which the cords (10) are guided.

7. Weaving machine according to one of the preceding claims, characterized

characterized in that a reed (15) is present, the reed teeth (16) form unilaterally upwardly open Rietlücken (17) and that the guide needles (4) are arranged such that when raising or lowering of the guide pins (4) of the guide needles (4) guided effect threads (18) in the Rietlücken (17) on or emersion.

8. Weaving machine according to one of the preceding claims, characterized

in that a thread supply (19) and a thread monitor (21) for effect threads (18) are arranged on the loom (1) in the area in front of the lines (10).

9. loom according to one of the preceding claims, characterized

in that the shed-forming device (9) is also set up for shedding the base warp threads (20).

10. Weaving machine according to one of claims 1 to 8, characterized in that a further shedding device is provided, which is set up only for the shedding of the base warp threads (20).