DE836325C - Method and device for the production of fabrics on rapier looms - Google Patents

Description

Method and device for the production of fabrics on rapier looms The invention relates to a method and apparatus for manufacturing contractions on grapple chairs, walhi at least one end that protrudes beyond the edge of the thread from registered in the compartment <° n shotf: iden by means of a device for gripping and holding is temporarily held and a device for carrying out the same.

In the case of aching stools, in which the gunshots are pulled from outside the compartment in 'hand-held bobbins', the thread is inserted into the compartment and cut off a little longer than the width of the tissue requires (1 protruding thread ends are held in place by glue cutting or when detaching from (learn to cleave until they are struck (for the reed and closing of the compartment by glue devices, so-called edge clamps) (Once the fabric is struck, hold on. So that (the end of the weft thread is not torn out of the edge clamp while the reed is struck, the clamping force of the clamping point must be selected to be correspondingly strong.

In the formation of folded edges, the protruding from the fabric The end of the thread is turned into a next subject, these are the strong clamping forces Edge clamp is particularly harmful in light fabrics because the end (lcs weft by the flap either: torn or then warped. Likewise be under Under the influence of this strong tension, the last warp threads are drawn close together and the edge woven in more tightly. As a result, the tissue is already in front of the spreader organs enter. Thereby the function of the spreading organs, which consists in the Hold the fabric wide as far as it will go, so that the reed is parallel to the warp threads emotional. not met for the edge threads. The warp threads of the edges are then through the greater lateral friction caused by Riet is weakened. The so educated Edge is due to the torn off weft ends and the more stressed warp threads for the further equipment of the tissue not only weakened, secreted especially suffers also in terms of appearance.

You have already tried to fold the ends of the weft thread through the Umbilical needle to open the clamping: telleii the edge clamping part. This causes an inaccurate Turning this weft thread ends, the lap thread as a result of its elasticity either jumps out of the clamping point and is not gripped by the folding needle or that <the folded end of the thread forms a loop outside the fabric.

To avoid these disadvantages, the method of the invention exists in that a change in the clamping force used to hold a thread end is carried out during operation. The device consists in (let during effective means of operation to change the one used to hold a thread end Clamping force are provided.

In the drawing are exemplary embodiments of the device for execution of the procedure shown apparently. It shows Fig. I the view of a rapier loom from the goods side, heg. 2 the egg guide for gripping and holding the weft thread with drive and control in two positions.

3 shows the clamping device and the control in their positions before the edge formation, Fig. 4 the position of the clamping device and (read tissue in plan view during the edge formation.

Fig. 5 a further Ausfülirting a Klenimorriclitung, feg. 6 (read Diagranini of the adjustment of the spring force, l'i9. ; a Kleninworrichtung with a Spring finitely adjustable spring force, l # 'ig. 8 a tax correction line, @@ - elche the change in the clamping force changes in some of the threads, U ig. 9 to 13 two Examples of a movable thread clamp resilient in its normal operating position held.

The rapier loom in Fig. I has two side panels i and 2, between those of the non-visible warp beam, the fabric beam 3 with the wound fabric 4, the not shown guide and tensioning devices for chain and geii fa> f, the main drive% i @ elle 5 of the loom with clutch and brake 6 and motor 7 as well as the reed 8 for beating up the weft thread and shafts g for shedding together the drive mechanisms that are inevitably connected to the main shaft 5, not shown the same are arranged. .

The weft thread i o, which is withdrawn from the bobbin ii, is used for Entry into the compartment attached to the shooter 12, the firing device 13 shot down via the weft path 14 in the safety device 1 5 runs. Close to Inside of the devices 13 and 15 is a device 16 for gripping and Holding the weft thread io provided while the control device 17 is the inlet of the shooter 12 in the catch box i5 controlled and in a known manner the timely The main shaft 5 or the loom is brought to a standstill by disengaging and braking, if this entry is delayed or does not take place at all.

After entry of the closing thread io into the compartment move the clamping devices 16 from their rest position into the shooting ball 14 of the shooter i i to grip the weft thread io, to clamp it and during the stop movement to hold by the reed 8 on the fabric 4 while maintaining the thread tension. The weft thread io can be made of vegetable, animal or metallic or other assist man-made material. If necessary, only one clamping device can be used i6, namely the one at the catch box 15, can be provided, on the other hand Division of the fabric 4 into several webs of fabric during its manufacture except between the two clamping devices 16 on both sides of the tissue 4 " two webs of fabric each be arranged.

In Fig. 2 the weft thread is already in the through the warp threads 18 formed Facli entered. The clamping device 16 connected to the drive rod ig connected and manufactured in one piece with the same in the exemplary embodiment is, with its clamping point, which consists of the foot part 2o and the movable clamping jaw 21 consists, from the dotted rest position I straight out into the position 1I in the Rifle railway brought.

The camshaft 22, which is positively driven by the main shaft 5 of the weaving machine, has a cam disk 23 which cooperates with the cam roller 24 of the angle lever 25. This rotates around the fixed pin 26 and presses by means of the control cam 27 on the guide needle 28 of the movable clamping jaw 21 with such force that the force of the springs 29 and 30 is overcome and the clamping point 20, 21 is kept open for gripping the weft thread. The driver 31, against which the compression spring 29 is supported, is firmly connected to the guide pin 28. The driver 31 has a fork-shaped stop 32 which comprises the guide needle 33 for the spring 30 , which is supported against the collar 34 and presses it against the stop 32 in the position shown. The spring force of the spring 29 is smaller than the force of the spring 30 when the sener terminal point 20, 2 t, z. 13. a third of the the same. The second cam 35 drives the lever 36 via the Nocketll-olle 37. The 1-leg 36 rotates do doll festoll 7apfell38 and is handle 39 with (leg Aiitriellsstange i9 firmly connected, welclic @ in (leg Viihrung 4o slides so that the Klemniv (direction i (@ an almost straight line \ vegtinr; leads out. With a strong tension spring 41 Will (lic I lcbel = 5 uu (l 36 with their drive rolls 24, 37 f; st against the cam disks 23, 35 pressed. Zuni spreading the gun .I at the : @ nschlagstv # lle tightly iri, as is well known, the broad 42 with (learn cover .13. I> ie @ \ irkungs \ veise is the following: DieWelle22 turns in the direction (go arrow and lift well. iiaclirlc-ni der Sclitli.) fa (leti to into compartment 18 a is, by means of (ki- cam track 44 the control iiocl <cii 27 from position III to position IV an, so (l.ti.i (-r dic l @ e (lerll 29, 30 releases, under their Force the lic \ veglirlie cheek 21 (i lap thread io before deal 1. (ia @ isen (los 1 # a (lens to voni Schützen 12 l) z \ #, -. \ -oi- (lein Alishnei (len clamped so that the ini Schulafa @ len in v @> rlian: lene Spantiting received read i1it. Then ittft (roll 37 on the cam track IS and it hangs (move lever 36 to the right, whereby the Kleninn'orrichtung i6 in the rest position 1 reached. [) he Schtißfadeii io reached on I? Ti (le (los Fadens i S an Lind can now of the offer > z posted wei-rleti. This position is in l @ ig. 3 shown. SO> ll now ('as @al (le t (@ (' des weft thread in (read ti @ icliste subject tone-steered, so will be through Change (put Scli: ifte 9 (read compartment 18 changed. I'in ntni for (las L "inlaying the thread end ioa die change the small force used to hold, becomes (put angle love 25 out of its position IV they returned to (Stelltilig 111th This suppresses now the stitches (ick: ti 46 (you needle 33 down. As a result, the collar 3.1 is separated from the stop 32 fetched "ritt (she 1 # e (ler 30 turned off. The Small force is thus applied to the force of the spring 29 and (lauer -auf (#iti Vicrtel (leg maximum decreased. Therefore, there is no risk to (read tissue .I resp. whose kailte (read I? nde loa (los Schußfa.dens io, how i11 Fig.4 shown. from the Z'inlegeriadel47 into the compartment turned over \ ver (1 <-ii. The weft thread end 1oa is dalr (-i from (lein hook. @ 8 of VinL @ gnadel .4; recorded, which in the well-known \ @cise zwatigslöig, z. B. from the Wave 22, aligetrielreil, in Sinlie (los double arrows Ilin and empty swings. Because the end of the thread ioa titin spawns atis (leg clamping device 16 out- Zielicil reads, aims (put hook 48 the thread io from (lay Klennnstclle 20. 21, without (sat warp threads on Edge are pulled together, and lays (read Vadenende to ('uni ins hach. The Klenunvorriclitung toi now remains in the in Fig. 2 dotted rest position I to a this year closing (Ien io in (las compartment i8 is entered. The clamping device 49 (Fig. 5) asked besides (leg 1) ritckfe (Ici- 5 (i, which via (lcn driver 31 die Kleniml (holds acke 21 closed, a tension spring 51, which is attached to the neck 32 and to the \ 'Iitliellmer 52 of the needle 53. The needle 53 is supported with its collar 5+ against the rod i9.

The clamping force of the spring 5o is indicated by P o in FIG. 6. The feather 51 is tensioned accordingly by pressing down the needle 53 by means of the control cam: I6 the size of the spring stroke k. At hl the spring force of the spring is 51 pl, at Spring \ veg h_ the force of spring 5i increases. The clamping force of the clamping point 2o, 21 is reduced to size R for lt, and to R2 for h2. The power of Zu, gfoder 51 is less than or at most equal to the force for the largest spring stroke h the compression spring 5o, so that the clamping force at the clamping point differs from the maximum until o can be set to any intermediate value. This is very easy Fabrics of particular advantage. To set a certain force of the spring 51 To be able to, only the control cam .16 needs to be adjusted transversely to the rod i9 will.

The clamping device 55 (Fig. 7) has only one compression spring 56, which over the i @ itnehmer; 7 keeps the movable jaw 21 closed. The spring 56 supports now not against the foot part = o of the clamping device 55, but against the fork 58, which is firmly connected to the needle 59, which by means of the against the viewer imagining head 6o from the control rail 61 to reinforce the clamping force is raised.

The clamping device is in position 1I in the rifle track for gripping the lap thread io. The control cam 62 goes from the position III in the position IN 'and is attached to the angle lever 25 (Fig.2). Simultaneously the control rail 61 also moves upward from position III to position 1V, in that the rail z. B. on one of the arm 25 parallel arm 25a of the angle lever is attached. As a result, the head 6o is raised and the spring 56 is tightened. When the clamping device 55 is withdrawn from position II into the rest position I slide my head. 6o along the rail 61 and remains raised and the clamping jaw 21 heavier burdened. The Head 6o lowered to reduce the clamping force by (inserting control rail 61 in (she goes down position III.

To achieve special effects in the fabric, different threads are sometimes used, which, entered in the shed, have different tension. The clamping devices 16, 19, 55 can then, for example, have a different clamping force for holding a thread than for holding another thread. In order to be able to change the clamping force, as shown in FIG 64 present, of which the cam 63 causes the opening of the clamping jaw 21 before gripping this lap thread io after each lap entry by pressing down the guide needle 27 to open the clamp 20, 21, while the control cam 64 is driven so that it applies the clamping force (put the clamping point on only some of the weft threads, e.g. with every other weft insertion, reduced in each case, and on the other part of the weft threads allows the full clamping force to exist.

Any other order would also be possible and by special design of the drive for the control cam 64 to be achieved. This would be possible because the camshaft 22 (Fig. 2) for the clamping device 16 only per two or more weft entries makes a full turn and to control the control cams 63 and 6.1 with each a lever angle cooperates. The cam 23 (FIG. 2) would then be used for Drive the lever for the control cam 63 with several control lines 44 as many as the number of weft entries per revolution of the camshaft 22 would be in any case, so that the control cam 63 with each weft insertion is effective. Another cam disk on the shaft 22 would then by means of a second angle lever control the control cam 64.

If the clamping force only had to be reduced for one thread, would have this cam disc only has one cam, if this were the case with more threads, like this a corresponding number of cams would be determined in advance according to the Gewel> enitister Places provided.

While in all examples the process cam track .14 ° (Fig. 2) to Reduce the clamping force was arranged so that this reduction only after Stop of the weft thread by the reed 8 and the change of subject was effected, can this reduction also take place before the beating to a weft thread ini To give tissue a different tension compared to the next or the one after that. In this case, only the trailing edge 44 ° is opposite to the cam clip, eil> e 23 to move the leading edge 44 towards.

Instead of both ends of a thread, 1> one thread end can also be used the clamping force can be reduced.

In the example according to FIGS. 9 to 1 i, the clamping device consists of two legs 112, 113, approximately perpendicular to one another. The thread clamp 112, 113 is attached to the drive rod i9 by means of the bearing journal i i-1. The leg 113 has a recess 116 and a stop pin on its shaft 121 equipped. The spring retaining bolt i 18 is through the recess 116 attached to actuator stem i9. The torsion spring i 19 is held on bolt i 18, one end of which presses on the pin 121 and thereby the thread clamp i 12, 113 in their normal, fixed by the stop between recess 116 and bolt i 18 Operating position to operating rod i9 holds. The further training of the clamping device is otherwise the same as in the example Fig. 2 to .t.

If the shooter 12 moves late against the catcher box 15, then according to FIG. As a result, the clamping jaws 20, 21 are held back, while the drive rod 19 inevitably has to move further in the direction of arrow 35 to its left end position (FIG. 9), since the loom is still in operation. The thread clamp 112, 113 pivots on the pin 114 in the counterclockwise direction, with its leg 1 13 moving upwards and tensioning the torsion spring iig. Since the shooter 12 has not reached the catch box 15 in time, the control device 17 (FIG. I) will respond and bring the loom to a standstill before the reed 8 begins its working movement. Nevertheless, the control device 17 (Fig. I) does not respond to the timely passage of the shooter 12 in front of the clamping device 20, 21 advancing into his firing path 14, but to the delayed entry of the shooter 12 into the trap box 15, i.e. only at a later point in time, the drive rod i9 can complete its movement in the direction of arrow 35. Thanks to the thread clamp i 12, 113 movably attached to the drive rod i9, the collision between the shooter 12 and the clamping jaws 20, 21 cannot lead to any damage to these parts because the thread clamp 112, 113 swings elastically.

In the embodiment according to FIGS. 12 and 13, the drive rod is i9 equipped with an angled leg 138, which is equipped with a stop! 139 is provided. The thread clamp 141 is rotatable by means of the screw bolt 140 fixed to the actuator stem i9. A torsion spring 1.12 is arranged on the bolt 140, whose extended end part rests against the clamp 141 and the same against the stop 139 pushes into the normal operating position directed transversely to the drive rod i9. These Torsion spring 142 is dimensioned so strong that it is affected by the movement of the drive rod 19 caused the mass effects of the thread clamp, which can be pivoted counterclockwise 141 overcomes and holds the same on the stop 139. Through the foot part 2o of the thread clamp 141 and the leg 145 through the guide pins 28 and 33, which the Actuate the clamping jaw 21 in the same way as in the exemplary embodiment according to FIGS.

The advantage of this small thread line i41 is its brevity of the leg i45, whereby a reduction in the size of the pivotable clamping mass can be achieved is. Occurs as a result of late entry of the shooter 12 into the trap box 15, a collision with the thread clamp 141 advancing into the weft path 14 is generated this collision only has small acceleration forces, because the mass to be pivoted the thread clamp 141 is small, which largely protects the sensitive Clamping jaws 20, 21 can be achieved.

Claims (1)

PATENT CLAIMS: i. Process for the production of fabrics on gripper looms, wherein at least one end of weft threads inserted into the shed projecting beyond the fabric edge is temporarily held by means of a device for gripping and holding, characterized in that lietric-lies vorgeiiotunieti. 2. \ -trfalireti according to claim i, characterized in that the Kletnnikraft is only changed for part of the registered weft threads. that a change in the clamping force is carried out while a thread is being held is reduced at the latest during the laying 5. Device for carrying out the process according to claim i h marked, claß effective means for changing the clamping force used to hold a thread end are provided during operation. 6. Apparatus according to claim 5 with a spring-loaded member clamping the thread, characterized in that (1a1.9 a control member influencing the spring force is provided for changing the clamping force. 7 Apparatus according to claim 5, characterized in that (leave at least two springs To generate the clamping force, the clamping element 1> elastic, which are independently controlled from one another. That is, the device according to claim 7, characterized by control means which switch off the effect of at least one spring on the clamping element 5, thereby ketitiz (icliti ° t, (let a spring with a weak spring force (read the clamping element constantly loaded, while another. Spring with a strong spring force (read the clamping element via a stop connected to the organ can load. Io. Device according to claim 5, characterized in that a spring with a strong spring force (the clamping element is constantly loaded and a further spring is provided whose spring force t acts in a direction opposite to that of the first spring on the clamping member and the tension of which can be changed by control means. t t. Apparatus according to claim 10, characterized in that the first spring is designed as a compression spring, the second as a tension spring. 12. The device according to claim 6, characterized in that "eketinz @ iclinet. That (read the organ holding the thread is movably attached to its drive element and held in its normal operating position relative to this organ by flexible means. 13. The device according to claim 12, characterized in that 14. Device according to claim 12, characterized in that the drive member has a stop against which the member clamping the thread rests in its normal operating position with respect to its drive member as a result of the action of a spring and from which stop the moving thread clamp removed when it encounters an obstacle against the action of this spring. 15. Device according to claim 12, characterized in that the drive element is designed as a rod and is provided with an articulation point at which the element clamping the thread is rotatably mounted Device according to Claim 12, characterized in that that the member clamping the thread is arranged transversely to the drive member. 17. The device according to claim 12, characterized in that the organ clamping the thread has two legs, one of which has a clamping jaw at its end and the other leg rests on the drive rod via a spring. 18. The device according to claim 17, characterized in that the spring is designed as a torsion spring which holds the organ clamping the thread in its operating position with respect to its drive rod. 19. The device according to claim 14, characterized in that the spring (142) acts on the leg (141), which is equipped with a clamping jaw (2o), of the organ clamping the thread (to). 2o. Device according to claim 1g, characterized in that the leg equipped with a clamping jaw is supported in its normal position against a stop on the drive member.