DE1535397C3 - Method and device for importing and pinching the weft thread in the rapier shuttle of a rapier loom - Google Patents

Description

The invention relates to a method and a device for inserting and clamping the Weft thread, in the rapier shuttle of a rapier weaving machine, in which the new weft thread to be inserted caught by the gripper earlier than it is cut from the tissue, whereby the Connection between the tissue and the supply reel is interrupted.

There are a number of weft insertion methods into the rapier shuttle of rapier weaving machines known. Of these, a tried and tested works in such a way that the cut thread end from the

ίο supply spool through a special mechanism is inserted into the gripper at the time when the gripper is in the rest position (German patent specification 950 839). In another method, the sniper catches himself during of running through the shed at full speed, the end of the weft thread on (German Patent specification 586,631).

Both methods have a number of disadvantages and shortcomings.

«Ο The device for performing the first procedure is especially structurally very complicated and demanding from a manufacturing point of view, because the weft thread, which reaches the point closest to the fabric during the attack, must

As at this point, first by means of a special forceps device caught, then cut off and finally with the whole of the pliers device mentioned be converted into such a position by means of further complicated mechanisms, in which the reliable introduction of the weft thread into the open gripper tongs of the looper protection guaranteed is. -.

It is necessary to open the gripper pliers of the gripper guard and insert the gripper device into it, that holds the weft thread, to push in the gripper device of the hook protection close, open the pliers device of the feeding mechanism and this whole mechanism again to slide back to the fabric bar in order to catch the further inserted weft thread. There must be such a large number of these complicated feed mechanisms that make a very complicated movement execute, exist how kinds of weft threads or weft thread colors are processed.

A major disadvantage of the second method is that the weft thread in the clamping mechanism of the hook protection penetrates at the moment of the beginning of its weft insertion, d. H. to the time when its speed is at its maximum. Since there is only a very short time interval for this clamping process is available, the interception of the weft thread is practically uncontrollable and therefore not fully guaranteed.

It is also known (German patent specification 677 255), the weft thread in the rapier shuttle to be introduced in such a way that the new weft thread to be inserted is caught earlier by the hook shuttle as it is cut from the tissue, creating the connection between the supply spool and the tissue is interrupted. After his flight through the shed, the hook shuttle arrives in the shooting box and holds the inserted weft thread in its front pointed part.

The rotating shuttle box is not mounted on the sley and therefore receives one of the Movement of the sley independent movement. After the gripper protection arrives, the

Shooter box rotated by 180 °, with the inserted weft thread withdrawn by a fairly large length must be, as the gripper shooter before cutting off the registered. Weft is rotated by 180 °. At the end of this rotary movement, the new weft thread to be inserted is in the inclined slot of the grab guard ", threaded in, but without being jammed. ÄÄMEhde der With a rotary movement, the gripper shuttle with the contactor box moves in the direction of the stop position through, namely an axial movement. Then another movement is carried out. Only then is an additional finger the weft is jammed. Up to this point in time, the weft thread slides in the gripping device of the hook protection so that the weft thread can rub off during these sliding movements. With this loom, a very complicated hook protection is necessary.

The invention is based on the disadvantages of the last-mentioned known method to avoid.

The invention consists in a method of the type mentioned in that the reed stop simultaneously with the catching of the new weft thread to be inserted by the hook shuttle he follows.

In this stop position of the sley, the fabric lies completely calmly and firmly against a certain one Place, while it is in known devices during the catching and trapping as a result the elasticity of the threads can easily move to unforeseen places, since outside the stop position the tissue edge migrates due to the elasticity of the tissue. So the invention uses the Stop position in order to carry out the necessary operations when the tissue is stuck. About it In addition, use is made of the fact that the reed is relatively long in this stop position Time is at rest and that shortly before reaching the stop position and shortly after the return movement or the beginning of the return movement, the sley moves at low speed. In The threading can be done in these moments of rest or the low speed of the sley and clamp with particular safety. But this also allows a great deal achieve simpler machine design of the loom.

It is useful here if the rapier shuttle starts moving the reed out of the stop position in the direction of his Gripping projection is rotated. This ensures that the thread is around the gripping projection loops around, whereby a secure attachment of the thread on the hook is achieved.

It is useful if a thread guide lever in the opposite direction during the reed stop the gripping projection is rotated. This places the thread securely behind the gripping projection. This is the second possibility to place the thread safely behind the gripping projection in such a way that he wraps around the gripping projection.

The threading out of the end of the weft thread already inserted advantageously takes place at the same time catching the new weft thread to be inserted.

It is useful if the separation of the end of the inserted weft thread and the beginning of the weft thread to be inserted with the beginning of the backward movement of the reed from the stop position he follows.

This procedure is expedient on a device carried out, in which the thread guide lever in the path of movement of the attached to the sley Shooter box and at such a distance from the sley located in the stop position it is arranged that the spring of the hook shuttle entered in the shuttle box on the thread guide lever comes to sit in the stop position of the sley and is pushed off by the gripping projection of the rapier protection.

It is useful if means for the mutual movement of the incoming in the contactor box Looper protection and the thread guide lever are provided.

For the threading out, it is useful if a threading out needle is provided, which consists of a

ao a pivotable lever centrally mounted and there is a needle pressed against the weft by a spring, the needle of which is turned away from the weft End presses against the contacts of the parking device in the event of the lack of the weft thread.

In the drawing, the subject matter of the invention is shown on the basis of exemplary embodiments. It shows

F i g. 1 the introducer in elevation at the moment as the grapple shooter in the contactor box comes in,

F i g. 2 the hook shuttle and the thread guide lever at the moment when the weft thread in the Grab protection is introduced,

F i g. 3 to 6 individual phases of weft insertion into the hook shuttle,

Fig. 7 to 9 individual working phases of the gripper, the sley and the fabric in plan.

On the sley 1 of the machine, the reed 2 is attached in the usual way, and on both sides The rotatable shuttle boxes 3, which are provided with a groove 4, are mounted on the sley 1 into which a one-sided gripper shuttle5 runs at the end of its path. This grapple shooter is a hollow body that has a point 6 on one side and a gripping projection on the other? is provided on which the pretensioned flat spring 8 comes to sit. The contactor box 3 obtained by a known type, not shown, after each insertion of the gripper protection a rotary movement of 180 °, by means of which the gripper shooter S moves into the new weft insertion position is brought. The contactor box 3 and the gripper contactors 5 perform a pivoting movement with sley 1, which is also the case on all shuttle looms.

On the immovable side walls 9 of the machine frame is on both sides of the machine A simple thread guide lever 11 is arranged on a pin 10 and is provided with a guide eye 12 is, through which the weft thread 13 is discharged from a cheese 14, which is also on the Machine frame is attached. In addition to the guide lever 11, there are scissors 15 on the pin 10 known type attached by a control mechanism, not shown, by a pull rod 16 is controlled.

On the side walls 9 two-armed pivotable levers 18 are arranged on the pin 17,

5 6

which are controlled by a pull rod 19. When the double-arm lever 18 is subsequently rotated, this strikes are brought onto the contact 24 with a double-armed extending lever 18 around the pin 17, which is provided by the del 20, which is caused to rotate on the pin 21 is. and with a spring 22 in the clockwise position of the parking mechanism, which is twisted around this pin 21 in a known manner. The 5 carries out the shutdown of the loom,
The double-armed threading needle 20 can, at the same time as shortly before the sley 1 reach its stop position, a weft thread monitor's wand, since you reach (Fig. 8), the spring 8 of the upper gripper arm 23 strikes in the usual way with the contacts 24 of the shuttle 5 End of the thread guide lever 11 and 25 of a known parking mechanism together (Fig. 3), whereby on the one hand a pressing of the remote work can be done. ■ i ° of the 8 from the projection 7 and on the other hand the ver

The shed 31 is made in the usual way from a shift of the left end of the penultimate interweaving system upper warp thread 26 and lower warp thread th weft thread 13 over the projection 7 durchge-27 formed, wherein the fabric to be produced 28 leads to, since the guide eye 12 of the. Thread ends Lasts by a conventional temple 29 guide lever 11 in the initial phase of the contact will. 15 tion of the thread guide lever 11 with the spring 8 in

The weft removed from the cheese 14 - in all cases above the end of the projection 7 of the

thread 13 is braked by a brake 30. Gripper protection 5 is located.

The device works as follows: In the end position when the sley 1 is hit

Gripper shooter5 is e.g. from the right to the pushing away of the flat spring8 from

knocked through on the left side, whereby from the cross 20 the projection 7, in which by the train the

bobbin 14 '(Fig. 7), which is on the right side of the spring 22 of the long forearm of the threading needle 20

Loom is located, the weft thread 13 'with the so far between the spring 8 and the front

'is taken, on the one hand clamped between its jump 7 and around the end of the projection

The hook projection 7 and the weft thread end 13 'looped around the pretensioned Flachfeges7

the 8 is clamped and, on the other hand, threads out around the front 25 of this clamp (FIG. 4).

jump 7 is looped around, so that its clamp- In the following moment it comes to the actual

tion in the looper shuttle 5 is absolutely reliable chen insertion of the weft thread 13 between the Fe-

(Fig. 1), even with small dimensions of the gripper 8 and the projection 7 of the gripper guard 5,

Protect 5 and when using a relative what basically by mutual movement of the

weak spring 8. 3 ° guide lever 11 and the hook protection 5

At the moment when the sniper shooter 5 hits the.

Nut4 of the left rotatable contactor box3 - In Fig. 2 'an embodiment is shown,

is running (Fig. 1), the sley 1 is in the rear, in which the gripper shaker is inserted

ren dead center. zen 5 is, while the guide lever 11 to the

It must be added that the 35 pin 10 is swiveled out _{in the direction S 1 beforehand, where-}

Looper guards 5 the weft 13 from the left through it to insert the weft 13

Cross-wound bobbin 14 has been entered into the shed, which was previously held in the fabric 28

(F i g. 1 and 7), this weft thread 13 on the, behind the projection 7 in front of the

right end is cut off and in full tissue-pressed spring 8.

width is woven into the fabric 28, while this introduction karin is much more advantageous

the left end through the guide eye 12 of the guide during the twisting movement of the gripper protection 5

approximately lever 11 carried out on the brake 30 to the cross-wound coil 180 ° in the rotatable contactor box 3

14 is running. will. In this case the guide lever 11 remains

The double-armed threading needle 20, which is considered immobile. For inserting the weft 13 Weft thread monitor can serve, is located in the 45 between the projection 7 and the pushed away Feser The working phase in front of the weft thread 13 'in FIG. 8 occurs when the rotary movement begins Position between the tissue 26 and the gripper 5. Hook protection 5 (Fig. 4). At the same time, the

At this moment, the sley 1 begins the rotary movement of the rapier protection 5 from its rearward position into the forward position sley 1 from its stop position (FIG. 8) into the to move, d. H. brought back into the 'stop position in which 5 ° rear dead center (Fig. 9), so that the reed 2 the inserted weft thread 13 'on the guide lever 11 at the next moment the fabric (Fig. 8) hits. If the weft thread ceases to act on the spring 8, so that it does not 13 'correctly entered in this movement, suggests more of the Vorspfüfig-4 is pushed away, like this the part that is between the fabric and that that the spring 8 by its own bias in Terminal point between the spring 8 and the front 55 direction to the projection 7 is guided and thereby jump 7 of the hook protection 5. is located on the. the weft 13 between itself and the longer lower arm of the double-armed Ausfädel- projection 7 of the hook protection 5 is stuck. As soon as needle 20 on. During the movement of the sley 1 in which the weft thread is clamped, the scissors cut Stop position begins the mentioned part 15, the woven part of the weft thread 13 on the this Ausfädelnadel around the pin 21 against the 60 fabric strip from (Figure 4), whereby the between the To twist the train of the spring 22, namely in the opposite 'spring 8 and the projection 7 of the gripper protection opposite direction to the clockwise direction, whereby the clamped part that is over the guide eye 12 of the leading out of the guide arm 23 from the guide lever 11 to the brake 30 and to the cross-possible area of action with the contacts' 24 coil 40 runs, separated from the woven part and 25 of the parking mechanism is guaranteed. 65 turns.

If the weft thread 13 'is not inserted correctly, when the sley 1 is moved into the rear one this rotary movement of the threading needle 20 to position according to FIG. 9 is the rotary movement of the

does not cause the pin 21, and the upper arm 23 of the gripper 5 with the rotatable contactor box 3 around

180 - continued until the last in the rear position the sley 1 of the rapier shuttle 5 is rotated by a whole 180 ° (FIG. 5).

Then the gripper 5 is hit from left to right, after the subject change beforehand has taken place (Figs. 5 and 6). . ,

The initial phase of entering the hook protection 5 in the new shed is irfrFTg. 6 shown, from which it can be seen that with this entry it is necessary to wrap the registered weft fa

dens 13 around the lead? of the hook protection 5 comes around, · with this looping considerably the clamping security of the weft thread 13 in the GreiferS increased and the use of the gripper guard 5 and the spring 8 with minimal dimensions and minimal force.

After the gripper 5 has entered the rotatable contactor box 3 on the right-hand side of the The machine repeats the procedure described.

For this purpose 2 sheets of drawings

309 650/136

Claims (8)

Patent claims: 1. Method for inserting and pinching the weft thread in the hook shuttle of a Rapier weaving machine in which the weft thread to be inserted by the rapier shuttle earlier caught as it is cut from the tissue, creating the connection between the Fabric and the supply reel is interrupted, characterized in that the reed stop is simultaneous with the interception of the weft thread to be entered is carried out by the rapier shuttle. 2. The method according to claim 1, characterized in that the gripper shooter with the beginning the backward movement of the reed from the stop position in the direction of its gripping projection is rotated. 3. The method according to claim 1, characterized in that during the reed beat-up a thread guide lever is rotated in the direction against the gripping projection. 4. The method according to claim 1 to 3, characterized in that the threading out of the end of the already inserted weft thread simultaneously with the interception of the new one to be inserted Weft thread takes place. 5. The method according to claim 1 to 4, characterized in that the severing of the end of the inserted weft thread and the beginning of the new weft thread to be inserted with the beginning the backward movement of the reed takes place from the stop position. 6. Device for performing the method according to claim 1 to 5, characterized in that that the thread guide lever (11) fixed in the path of movement of the sley (1) Contactor box (3) and at such a distance from the one in the stop position Sley (1) is arranged that the spring (8) of the rifle box (3) has entered The hook protection (5) on the thread guide lever (11) in the stop position of the sley (1) comes to sit up and is pushed off by the gripping projection (7) of the gripper guard (5). 7. Apparatus according to claim 6, characterized in that means for mutual movement the hook protection (5) which has entered the contactor box (3) and the thread guide lever (11) are provided. 8. Apparatus according to claim 6 and 7, characterized in that a threading needle (20) is provided, which consists of a centrally mounted on a pivotable lever (18) and by a spring (22) against the weft thread (13) pressed needle, the weft thread (13) facing away in the case of the lack of the weft thread (13) against the contacts (24, 25) the parking device presses.