DE1254099B - Shooterless loom - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. CL:

D03d

German KL: 86 c -14/15

Number: 1254099

File number: L 40833 VII a / 86 c

Filing date: December 30, 1961

Opened on: November 9, 1967

The invention relates to a shuttleless loom with the shed on both sides long arms arranged grippers, which are inserted in opposite directions in the shed and withdrawn again and insert the weft thread alternately from one side and the other, the weft thread being passed from one gripper to the other in the middle of the fabric will.

Shuttleless looms are used in various ways in the textile industry. With these Looms are not the weft thread through reciprocating shuttle, which the weft bobbin included, registered, but with the help of grippers or projectiles that the weft of a stationary spool. It is also known to pneumatically through a weft thread Enter air flow, with the weft thread is drawn off from a stationary bobbin. However, all these machines have the disadvantage that they are not normal, as is the case with shuttle looms Selvedges are formed, but that complicated edging devices are required.

In a known weaving machine ("weaving mill" by J. Schneider, 1961, pp. 33 and 34, type Ancet-Fayolle) becomes a normal selvedge on the side of the fabric facing the weft bobbin educated. However, an artificial edge, e.g. B. by Dreher, are generated. Apart from the fact that an artificial edge has defects, there is also a for the sale of unwanted uneven edges on the fabric.

Another well-known version ("Textil-Rundschau", 1958, pp. 7 to 14, published German patent application B 5223 VIIa / 86 c and French Patent specification 767137) carries in the weft yarn by means of a projectile. If the weft at the same time is entered into several adjacent webs of fabric, a natural selvedge can be created are not formed at all. Elaborate edge insertion devices, high thread consumption In the edge and bulging edges are the disadvantages of this arrangement.

The above projectiles are also known as grab shooters. They generally exist from relatively small steel shooters who carry a grapple clamp, and become like that otherwise usual web shooters knocked or shot through the shed. The difference to the shuttle is that the shuttle are large and heavy and inside them Shuttleless loom

Applicant:

Lindauer Dornier Society m. B. H.,

Lindau (Lake Constance)

Named as inventor:

Dipl.-Ing. Peter Dornier, Lindau (Lake Constance)

carry the weft bobbin from which the weft is withdrawn. In the case of the grab shooters, on the other hand the weft thread to be inserted is held by a hook clamp on the hook shuttle and withdrawn from a fixed weft bobbin outside of the shed. These grapple shooters are therefore also referred to as coilless contactors. After passing the weft through the Have entered the shed, transported back to the starting point outside of the shed, to be knocked off again from there. In this cycle, of course, there are quite a number required by such gripper shooters in order to achieve a high rate of fire.

The Sulzer weaving machine is an example of such weaving machines with rapier shuttles ("Textil-Rundschau", 1958, pp. 7 to 14). In this machine, the free weft ends remain on the The fabric edge protrudes, so that a special insertion device is required here if an unattractive one The appearance of the fabric edge should be avoided. With the loom according to the announced German patent application B 5223 VII a / 86 c is a thread loop for each coilless shooter formed, the total length of which corresponds to the width of the fabric. The grapple shooter carries with everyone Run through such a loop as the first or second leg of a hairpin-shaped weft thread loop a. With another known device (French patent specification 767 137) it is possible to enter different weft thread sequences with looper guards, namely as hairpin-shaped Loops or as simple weft threads, the free ends of which are on one side of the fabric edge be inserted. All these known devices have the disadvantage mentioned above, namely that the free weft thread ends are inserted into the fabric by special edge insertion devices must be, whereby bulky edges arise.

709 687/111

In the case of weaving machines ("weaving mill" by J. S chnei der, the one arranged on both sides of the fabric edge and for 1961, p. 321 to 323, »Engels-Greiftex-Web- the length of the weft thread ends to be freely inserted machine «) which, in place of grapple gates, with relevant clamping and cutting devices from Looper work, the weft thread is through one of the fabric edge. In this way it is achieved that Gripper inserted approximately to the middle of the fabric and 5 tfwes the non-integrated weft thread there another, from the opposite side, are shorter than the width of the fabric web, so that hand over guided gripper. The gripper did not pick up any thread ends protruding like a brush Weft thread is treading when it is inserted into the weave. Every second one is in the usual way fold cut off within the selvedge and bound the weft, and there is a sufficient cut thread end inserted into the edge, so solid, non-bulky edge. The invention erd that a solid edge is formed on this side. so makes it possible to have a fixed and on both sides The other end of the thread is obtained by the hook from the smooth edge that is not bulky because The bobbin is pulled off and guided to the middle of the fabric, no protruding ends are involved where it must then from the gripper on the other side of the machine. In addition, any loss of yarn is due to the is taken over. The weft thread is then avoided 15 edge. It is advantageous that the pulled completely through the shed. For moving the clamping and cutting device The formation of a selvedge on this side of the fabric is one that can take place during operation. It is through it special device required, through which it is possible to insert a large length of thread at the beginning. Set the protruding thread end in the next compartment so that the thread ends are on the edge of the fabric is placed. survive like a brush. Later, however, can

In order to move the clamping and cutting device on looms working with grippers an evenly bound edge on both will be that the thread length gets shorter and shorter and It is already known to preserve fabric sides - after all, the free thread ends within the weave have become (German patent 374 353), the weft edge remains. Controlling the shift for yarn alternately from the left and from the right as the clamping and cutting devices from the opposite side of the fabric to be entered. In this process, it enables the machine side to be overlying So the weft yarn is fixed alternately by two - while observing the edge on this side at the same time Coils withdrawn. Here we pay attention to both and the clamping and cutting devices Fabric sides formed a uniform edge, with on the other side during the course of the Mader every second shot on each side to be set normally on the machine.

is bound, while the intervening In the drawing is the subject of the invention

Wefts end as free threads, which makes a schematic diagram of an exemplary embodiment The edges have a nice, brush-like appearance. shown. It shows

These protruding thread ends are on the web F i g. 1 a loom with grippers in strong

machine or can hardly be removed afterwards. 35 simplified form,

In a further known weaving machine, FIG. 2, the transfer elements of the left gripper

("Weberei" by J. Schneider, 1961, p. 323 and somewhat enlarged and

324, "System Thoumire"), in which Fig. 3 several phases from the mode of operation of the

both sides are woven, grippers are again in front of the loom.

seen the weft thread in the middle of the weave 40 In the figures are passed to distinguish the simple. During the thread transfer, a thread brake on the corresponding parts on both sides holds the parts on the right-hand weft thread that the weaving machine is pulling off the weft bobbin. At the same time, a line is cut from the machine side,
Scissors guided at the bottom through the bar are the thread from thread reaching devices (Fig. 1)

of the previous shot, to a certain extent, only clamping and cutting devices were drawn from the outer edge inside the fabric. On a frame 14 of the loom. The end of the thread that has now become free is completely attached. Drive elements 9 and 9 'are attached. This pulled through the shed. The cut drive elements move the gripper 7 and T in the end which is not short here and is tied back and forth on the entry side in a manner which is further described in a compartment. This weaving machine does provide edge 50 moving motion. As can be seen from the figure, without a brush-like appearance, however, the transfer points 8, 8 'of the two grippers require special devices for cutting the thread - not in the dot-dashed center of the ends within the fabric edge. It also gets fabric web, but are each in the direction of one in this way a bulky fabric edge. the relevant coil that is in tightening

The invention is based on the object of displacing a 55 a little * outwards. This will shuttleless loom of the type mentioned at the beginning by simply staggered arrangement of the transfer and last-described type to the effect that donors 17 or XT and takers 18 or 18 'improve that by taking advantage of their advantage, achieved on the grippers.

Edges without a brush-like appearance, their disadvantages, in FIG. 2 are the transfer organs of the left

Use of special facilities for Ab- 5o gripper 7 shown somewhat larger. The encoder 17 of the cutting of the thread ends within the tissue gripper 7 is offset from the center of the tissue by the dimension χ edge, avoided by the omission of these devices to the left. To the same degree χ is also to be. According to the invention, the target is thereby displaced to the right by the slave 18. If it is sufficient that the mutually associated transfer interaction of the opposing gripping organs on the grippers from the center of the tissue from 65 fer 7 and T is, for example, as shown in FIG. 1 in each case in the direction from which the corresponding is shown, weft thread inserted from the left to weft insertion takes place, offset by a piece of the transfer point 8 shown in dashed lines, which is greater than half the distance in front of the fabric center transferred. The handover point

Claims (1)

for the other direction of the weft insertion is with 8 'The operation of the machine is as follows designated. (Fig. 3): The reference numerals are from FIG. 1 A weft thread 2 is taken over by a fixed one and 2. The representation is very strong Coil 1 is withdrawn and initially runs through a simplified. For clamping devices 4 and 5 Thread brake 3, then by a clamping device 4 5, two symbols have been selected, of which About the encoder 17 of the gripper 7 and back to a small circle means that the clamping device one lying outside the fabric edge 23 is opened, and a cross means that the clamping-clamping device 5. The clamping device 4 is closed on device. Furthermore, respectively of the machine and in contrast to only the master and slave clamping device that is in action 5 not laterally displaceable, since io organs of the gripper are drawn in and the others they are not dimensionally omitted for the length of the free thread ends. The direction of movement of the gripper is is blessed. indicated by arrows. When the weft thread 2 is inserted, the thread In F i g. 3, α the weft thread 2 is held at its end by the clamping device 5, while 20 is firmly clamped on the clamping device S. The rend the clamping device 4 is open. The thread 15 donor 17 pulls the weft as it moves forward so it is pulled through to the transfer point 8. thread from the fixed bobbin 1. The transfer of the weft thread to the slave 18 'takes place at the spanning so that the transfer takes place reliably. transfer point 8 with the clamping device 5 closed, after the transfer has taken place, the thread end clamped by the clamping device 5, as mentioned above, is released so that the thread end is released. After the transfer, the clamping device 5 is opened completely to the other side of the tissue and the clamping device is pulled forward. The distance y of the clamping devices 5 direction 4 closed. When the or 5 'goes back from the respective fabric edge 23 or 23', as shown in FIG. 3, b is shown, which is now selected so that it is less than the double taker 18 'the free thread end 20 completely. Dimension of the displacement χ of the transition point 8 from 25 From Fig. 3, c it can be seen that the free thread end 20 drawn smaller from the left through the fabric center, ie in other words, is still within the spirit than the distance between the two transfer fabric edge 23 ' ends. On the entry page is the digits 8 and 8 '. In this way it is achieved that the weft thread is bound at the fabric edge 23 to 21 with the free thread transferred at the transfer point 8. From the right, a second end is already slightly shorter than the remaining fabric width, 30 weft thread 2 ', whose free end 20' so that after it has been pulled through, the thread end is already released from the clamping device S '. does not emerge from the fabric edge 23 '. The transfer of this weft takes place on the To the length of the free thread ends flawless transfer point 8 '. To measure the weft insertion processes and also to be able to adapt the weaving machine to different ones from the right-hand side, the clamping 35 above in FIG. 3, b illustrated processes from the and cutting devices 5, 6 and 5 ', 6' to a, left side. In Fi g. 3, d , the free structural unit end 20 'with its compact dimensions is already combined from the right through the fabric through 10 or 10', which is drawn through suitable and ends at a certain distance in front of the center and can be laterally displaced. In Fig. 1 is for this purpose the left fabric edge 23. This weft thread is tied into the clamping and cutting devices 5, 6 on the right-hand fabric edge 23 'at 21', holding part 10 at 11 on a spindle 12. The encoder 17 is already on again in the forward order, which moves in the frame 14 of the loom and continues to pull the weft thread from is stored and can be adjusted by a handwheel 13 '. the bobbin 1. The transfer takes place again at the spindle 12 is advantageously from the one transfer point 8. In FIG. 3, e another phase is arranged continuously to the other side of the machine. 45 shown for pulling the weft thread. In this way, z. B. the selvedge 23 'after the handover, the clamping device 5 is respected and closed by turning the handwheel 13', and the cutting device 6 cuts the clamping device 5, the distance for the length of the weft thread. The free end 22 of the weft of the free thread ends at the selvedge 23 'of the dimension thread is fully adjustable in a known manner. 50 drawn in a corresponding manner. This also ends within the servants and the clamping and cutting devices 5 ', 6' weaving edge 23 ', as can be seen from FIG. 3, /. On the opposite side of the machine to the rest of the construction, FIG. 3, / still the weft insertion borrowed unit 10 'combined and on one on the right side, already arranged again after heSpindel 12', which now follows from the left handover at the transfer point 8 'of the weft machine side by a handwheel 13 adjusts - 55 thread by the cutting device 6 'is cut off bar. and its free end 22 'is pulled through. Since the clamping F i g. 3, g finally shows the position of the weft threads and cutting devices 5, 6 not on the same on a section of the finished tissue. on Can lie, the released or both sides are formed with a smooth edge cut thread ends of different lengths. 60 no thread ends protrude like a brush. From the The difference is insignificant, but it does not affect the individual phases of FIG. 3 is also clear also to be able to eradicate, the arrangement can emerge in such a way that the transfer points from the be made that the times for opening the tissue center from always in the direction of the down the terminal 5 or the coil located for actuating the cutting pull are offset, device 6 are mutually adjustable in such a way that 65 .. free thread ends of the same length are always obtained, claims: It does not matter whether it is a cut off 1st shuttle-less loom with to both or a released thread. Sides of the shed arranged on long arms