DE6921205U - WEAVING MACHINE WITH REMOVAL OF WEFT FEEDS FROM FIXED SPOOLS FOR WEAVING TWO FABRIC PATHS, IN PARTICULAR PROTECTED DOUBLE CARPET WEAVING MACHINE - Google Patents

Description

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State of the Art Publications Report GDR patent DAP 56 505 class 86c, group 14/01 GDR patent DWP 60 2 - 6 class 86c, group 14/01 GDR patent DWP 64 254 class 86d, group 5 West German patent 853 279 class 86c _t group 14/05

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List of the reference symbols used

1 and 2 Weft coils 3 and 4th Weft threads 5 and 6th Locking brakes 7th and 8th Governing bodies 9 and 10 Governing bodies 11th and 12th Pull-back lever 13th and 14th Thread guide roses 15th and 16 Driving pin 17th and 18th Thread guiding organs 19th and 20th Thread trimmers 21 and 22nd Grapple protection 23 and 24 Contactor box 25th and 26th NC curves 27 Warp threads 28 Reed 29 Sley 30th Governing body 31 and 32 Brake disc 33 wave 34 Stop pin 35 and 36 camp 37 Bearing block 38 attack 39 Compression spring 40 Knurled nut 41 and 42 Holding part 43 and 44 Shop lanes 45 and 46 Eyelets 47 öffnerbttgel 48 Contactor terminals 49 Angle lever 50 pivot point 51 pull bar 52 pivot point 53 Double lever 54 pull bar

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55 and 73 Double lever 56 pivot point 57 role 58 Shaft shaft 59 Cam 60 hook 61 Tension spring 62 Shooter body 63 Schützenspitze 64 Recess 65 Seesaw 66 camp 67 Terminal top part 68 Catches 69 Clamp lower part 70 Contact surfaces 71 S inlets 72 Clamping surfaces 74 feathers 75 Wedges 76 Recess 77 Recesses

Weaving machine with removal of the weft threads from stationary bobbins for weaving two webs of fabric on top of each other, especially rapier double carpet weaving machine

The invention relates to a weaving machine with removal of the weft threads of stationary bobbins for weaving two webs of fabric on top of each other, in particular rapier double carpet loom in which on there is only one single-cell contactor box on each side of the machine and the two contactor boxes for the purpose of carrying out a cross strike alternately adjust to the shed with the hook guards.

In a known rapier double carpet loom this Art, the inserted weft threads are cut off by cutting devices attached to the edges of the goods The disadvantage here is that this interrupts the connection between the inserted weft threads and the weft thread feeding devices is and therefore the expense of extensive technical means is required to ensure that in the weft threading devices the remaining weft threads and presented to the looper shooters in the tightened state when the weft is inserted. " This leads to undesirable complication of the weft feeding device and thus the weaving process

In the case of looms of a fundamentally different type, namely rapier shuttle looms devices known for single-lane weaving, with regard to the weft thread feed, are for rapier duplexers Pich weaving machines of the type described at the beginning are unsuitable because they have the

> The specific conditions prevailing here not or only inadequately

correspond to the dimensions and on the other hand mostly complicated and expensive in their structure are.

So a loom is known, in which after the entry of the weft thread this tightened by a thread puller in the compartment and after the «removal

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cut the end connected to the weft bobbin at the edge of the fabric for a new one Entry is presented to a sniper. The disadvantage of this The loom is that the process of weft pulling takes place in two stages, namely once the tightening in the shed and after the cutting at the fabric edge, the further retraction of the end connected to the weft spool into the for the subsequent weft entry required end position · The timely and timely execution of these work steps requires extensive control devices for actuating the thread retractor, with the result that these devices are very expensive and their structure is complicated is"

Furthermore, a loom is known in which the inserted weft thread after it has been released by the rapier shuttle, by means of one attached to the sley and its movement into the front dead center position following withdrawal means withdrawn to the fabric edge of the storage side Shortly before the front dead center position is reached, the compartment falls over, so that a further withdrawal of the inserted weft thread from the shed is no longer possible and the weft thread can be retraced from the weft bobbin occurs · If the front dead center position is reached, the Retraction means the weft thread to a holding device, which for the purpose of creating more favorable conditions in the Schußfadsnklsaaung through the gripper contactors is arranged in a stationary manner at the level of the specialist tip. The transfer of the weft thread requires a precise interaction of the retraction means and the weft thread holding device. Deficiencies in this regard as well as a noticeable deviation from the one to hold the handed over Weft thread required clamping force lead to disturbances in the weaving process » Another disadvantage of this loom is that the phase of the weft thread withdrawal is relatively large here because it over a large part of the sley movement after the front dead center position extends · Maintaining the relationship between sley movement and shed closure is therefore extremely important because of inaccuracies can lead to disruptions in the weaving process

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of the inserted weft thread so that the resulting train the one arranged in front of the shot coil and still under load Thread brake can lead to weft breakage and the weft end on Overhanging fabric edge of the storage side. If the compartment closes too late, it will the length of the set retraction path has been exceeded and there is the danger that the weft thread end is pulled back behind the fabric edge of the deposit side and that this leads to fabric defects * The weft lowering required in preparation for the subsequent weft insertion to capture the weft by the hook shuttle by means of a thread countersink arranged on the sley and automatically controlled also adds to the complexity and complexity this loom at *

It is also known, the inserted weft thread by means of one of to retract a swivel lever controlled by a cam disk the beat rhythm on the swivel lever, the swivel movement of which is adjustable for the purpose of determining the retraction « The insertion of the weft thread into the path of movement of the knocked-off hook protection takes place here in such a way that the fingers are formed Gripping organs one arranged above the contactor box and inevitably controlled device act on the weft thread running between the fabric edge and weft thread guide of the feed device and present them to the clamping devices of the gripper guard «These too The weaving machine has the disadvantage of a too complicated structure «

It is the purpose of the invention, that part of the weaving process in rapier double carpet looms to simplify the type described above, the one between the weft entry and that for the following Weft entries required tightening of the weft threads running from the fabric edges to the weft bobbins "

The object of the invention is to create a rapier shuttle double carpet loom, which with a simple mode of action and an equally

such a structure a secure gripping and clamping of the entries Weft threads guaranteed by the rapier shooters, as well as the withdrawal the weft threads inserted too long and their renewed tightening in the area between the fabric edges of the insertion sides and the weft bobbins made possible without additional driven means

According to the invention this is achieved in that on the entry pages rigidly connected to the sley, FadenfUhrorgane so arranged are that the weft threads can be brought into the upwardly open recesses of the knocked-off gripper sluices that are continuous in the weft direction are that on the sley for the inserted weft threads reacting to the shuttle box change and under the influence of their own weight lowerable retraction levers are arranged that the retraction lever can be brought into their starting position by the contactor box and that by means of the thread guide elements between the fabric edges of the entry pages and the weft threads running through the weft bobbins can be tightened Openings pointing to the shop lanes are attached, whereby the distance between the eyelets and the shop lanes is adjustable According to a further feature of the invention, the retraction levers are on, in with the sley firmly connected bearings loosely rotatable shafts articulated on which to establish a relationship between the Retraction levers and the contactor boxes are rigidly arranged driving pins that correspond to the contactor box movement with the contactor boxes Lateral contact received «The dead weight of the retraction lever acting on the weft threads can be adjusted by changing the load arm · The thread guides of the retraction levers are according to the invention arranged between guide members rigidly attached to the sley and guide members pivotable about the pivot point of the retraction lever, the Distance between the swiveling guide elements and the thread guide eyelets is adjustable · The retraction length of the inserted weft threads is stop pins pivotable around the pivot point of the retraction lever by means of a non-rotating gate and fixed adjustable stops can be determined · Another feature of the invention is that between the Weft bobbins and the return levers on the sley are uncontrolled blocking brakes are arranged «

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Finally, it is in the boast of the invention that the gripper shooters Have slider clamps that protect two lengthways of the gripper have staggered inlet openings with downstream clamping surfaces, wherein the Klammenobertail including the catch noses rigidly with one Opener bracket is connected and with this forms a rocker that dorch Spring pressure can be brought into the clamping position of the weft threads rise «For the wedges are in the lower part of the clamp Recesses provided "

The hit of the invention is thus a rapier shuttle double carpet loom have been created, which in a simple way a secure he " gripping and clamping of the weft threads to be inserted guaranteed, as well as the withdrawal of the weft threads inserted too long and their renewed Tightening in the area between the fabric edges of the entry sides and the weft spools without additional driven means enables "

The invention is explained in more detail below using an exemplary embodiment will «show in the accompanying drawings:

1: a partially schematic representation of the rapier shuttle double carpet loom before teeing off,

Fig. 2: a partially schematic representation of the Grelferschützen double carpet loom with weft entry,

3: a partially schematic representation of the rapier shuttle double carpet loom after the weft insertion,

Fig. 4-: a partially schematic representation of the rapier shuttle double carpet loom during the renewed contactor box change,

Fig. 5: a partially schematic representation of the rapier-double carpet loom during the front loading position

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Fig. 6: a view of the weft retraction device on the left Loom side seen from the edge of the goods,

FIG. 7: a side view of the weft thread retraction device according to FIG. 6,

FIG. 8: a side view of the weft thread template for the double shed from FIG seen from the right side of the loom,

9: a control of the thread cutting devices

10: a top view of the gripper guard, Fig. 11: a side view of the gripper guard,

FIG. 12: a sectional view through the gripper protection according to FIG. 11, Fig. 13: a sectional view of the hook protection according to Fig. 10 «

The schematic representations of the rifle run C Fig «1 to 5) show the weft bobbins 1 and 2, the weft threads 3 and 4-, the blocking brakes 5 and 6, the guide elements 7 and 8, as well as 9 and 10, the retraction levers 11 and 12, with the thread guide eyelets 13 and 14, the driving pins 15 and 16, the FadenfUhrorgane 17 and 18, the thread trimming devices 19 and 20, the looper gates 21 and 22, the gate boxes 23 and 24-, the opening cams 25 and 26, the warp threads 27, the reed 28 and finally the sley 29.

Fig. 1 shows the looper gates 21 and 22 in the cut-off position. The weft threads 3 and 4- pass from the weft bobbins 1 and 2, one after the other, the blocking brakes 5 and 6, the guide elements 7 and 8, the thread guide eyelets 13 and 14 - the retraction lever 11 and 12, the guide members 9 and 10, the thread vehicle bodies seen 17 and 18 and reach of unillustrated loom harness from behind the pivotally mounted on the cloth edge thread cutting devices 19 and 20 to the cloth fell · the follower pins 15 and 16 are located at the shuttle box 23 and 2h in "the thread guide loops 13 and Λh form a line with the guide organs 7 and 9 as well as 8 and 10 The blow can take place *

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The snatchers 21 and 22 were knocked off in a cross shot (Fig. 2), At the beginning of the SchUzenflUge took place through the thread guide organs 1? and 18 the transfer of the weft threads 3 and 4 to the rapier shuttles 21 and 22. As a result of the flyby of the grab shooters 21 and 22 on the thread trimmers 19 and 20, the weft threads 3 and 4 stretched around their cutting and were grown by the growth of the tensile forces cut * This was a separation from the previous ones inserted weft threads and the rapier sluices 21 and 22 carry into the warp threads 2? newly formed shed the weft threads 3 and a. The rifle boxes 23 and 24 changed during the sniper flight to the other shed and thus withdrew the attachment from the driving pins 15 and 16 * The tension of the entered at high speed Weft threads 3 and 4 have the effect that the retraction levers 11 and 12 initially remain in their original position «

Figure _# 3 shows the position of the gripper shuttle 21 and 22 after completion of weft insertion and entry into the shuttle box 23 and 24. The gripper shuttle 21 and 22 are withdrawn from the sheds and are by passing the Öffnerkurven 25 and 26 clamped by them weft yarns 3 and 4 released * The result was. that the tension imparted to the weft threads 3 and 4 by the weft insertion dropped to a great extent, so that the dead weight of the retraction levers 11 and 12 predominated and these swiveled out under their influence until the driving pins 15 and 16 came into contact with the contactor boxes 23 and 24 * The FadenfUhrungsöseη 13 and 14 followed this pivoting movement, which resulted in an increased demand for weft thread material between the guide elements 7 and 9 as well as 8 and 10 * The tension of the blocking brakes 5 and 6 prevented that this additional demand was covered by pulling off the weft bobbins 1 and 2 * The weft ends of the weft threads 3 and 4 protruding on the depositing sides of the fabric were therefore withdrawn to the edge of the fabric in question.

The new beginning of the contactor box change is shown in Fig * 4, The change takes place within this loom rotation for the second time, around the contactor boxes 23 and 24 during 180 ° more crank angle for the blow distribution to bring the required starting position according to Fig * 1 * at the same time are transmitted via the contactor boxes 23 and 24

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receiving pins 15 and 16, the retraction levers 11 and 12 and their thread guide eyelets 13 and 14 raised «The thread trimmers 19 and 20 pivot upwards. Fig. 5 shows the sley 29 in its front position · The sley 29 is stopped · Its movement following, the thread guides 17 and 18 brought them through running weft threads 3 and 4 behind the upwardly pivoted Thread trimmers 19 and 20, which were then lowered · The contactor box change continues and so does the lifting the retraction lever 11 and 12, whereby the weft threads 3 and 4 sag between the guide elements 7 and 9 and 8 and 10. After completion To change the contactor box, the retraction levers 11 and 12 are raised again by means of the driver pins 15 and 16 that the thread guide eyelets 13 and 14 are in line with the guide elements 7 and 9 as well as 8 and 10 are located. When the sley decreases 29 the distance between the thread guide members 17 and 18 which are moved with them increases to the edge of the goods in question, whereby an additional requirement of weft thread material occurs, the cover by tightening the between the Guide organs 7 and 9 as well as 8 and 10 sagging weft threads 3 and 4 takes place «The weft threads 3 and 4 lie on the cutting edges of the thread cutting devices 19 and 20. This position corresponds to that in FIG Fig. 1 shown, only the gripper gates 21 and 22 are reversed in their position.

An exemplary embodiment for the weft thread retraction is shown in FIGS. 6 and 7 shown «

Since the means for this are the same on both sides of the loom, only the device on the left-hand side of the loom is shown «All parts are directly or indirectly connected to the sley 29 connected «The weft thread 3 coming from the weft bobbin 1, not shown here, passes the guide element 30, the brake plates 31 and 32 of the blocking brake 5 »that which is preferably arranged on the shaft 33 Guide element 7, the thread guide eyelet 13 of the retraction lever 11 as well as the guide element 9 and runs to the thread guide element, not shown here 17 · The device is in the position shown in Fig. 1 «This position is entered until the time of the release of the Maintain weft thread 3 «After its release, the swivels

Retraction lever 11 in the manner already described in FIG. 3 downward. This pivoting movement can be limited as shown in FIG., After which the driver pin 15 rest on the lowered Contactor box 23 receives. This is done more advantageously, however, as shown in the exemplary embodiment, namely by the retraction lever 11 and the driver pin 15 resting with its free end on the contactor box 23 and the stop pin 34 rotatably with the in the Bearings 35 and 36 of the bearing block 37 rotatable shaft 33 is connected « If the retraction lever 11 now pivots downward, the stop pin 34 follows this movement until it is fastened to the bearing block 37 adjustable stop 38 meets, whereby the end position of the retraction lever 11 and thus the retraction length is determined. The one between the Guide organs 7 and 9, the additional requirement of weft thread material that has now arisen is, as already described in FIG. 3, by withdrawing the entered Weft thread 3 covered up to the edge of the goods, since the braking plates 31 and 32, which are loaded by the tension of the compression spring 39, brake the weft thread 3 and thus prevent it from being pulled off the weft bobbin 1. The on the weft thread 3 acting braking force is greater than the force that occurs when the weft thread 3 is withdrawn due to its friction on the warp threads 27 in the thread guide member 17, guide element 9 and in the thread guide eyelet 13 is created and acts in the opposite direction to the weft reel 1 · On the other hand, it is chosen so that in the case of the weft entry to overcome the static friction occurring between the braking plates 31 and 32 and the weft thread 3 is less than the tensile strength of the weft thread 3. The tension of the compression spring 39 and thus the Braking force is regulated by the knurled nut 40

An exemplary embodiment for the weft thread template from the right side of the loom 8 shows. The thin illustration shows the sley 29 and the quiver devices at store stop, while the strongly drawn lines, their position at the moment of grasping the weft threads 3 and 4 through the grab gates 21 and 22, i.e. shortly before the rear shop position « identify · The folded parts 41 and 42 of the thread threading organs 17 and 18 are rigidly connected to the sley 29 «You are each at the compartment entrance arranged in such a way that the openings attached to them and directed towards the store lanes 43 and 44 and the weft threads 3 and leading eyelets 45 and 46 between the opening bracket 4? and Schüta-

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clamp 48 of the gripper sluices knocked off in the upper or lower compartment 21 and 22 step · The ones coming from the weft feeders Weft threads 3 and 4 run into the eyelets 45 and 46 from above to the edges of goods

From the representation it can also be seen how the weft thread 4 behind the thread cutting device 20 running around its cutting edge and arrives at the eyelet 46 · Analogously, this is also done on the left loom side

Fig. 9 shows the control of the thread trimming devices 19 and 20, Such a device is arranged on each loom side. The illustration, which relates to the left loom side, applies to the right side accordingly «On the angle lever 49 with the fixed in the machine frame recorded pivot point 50, which is in excavated Position located thread trimmer 20 attached · At the other end of the angle lever 49, the pull rod 51 is articulated, the in turn movable with the double lever 53 rotatably mounted in 52 is connected · The tie rod 54 provides the articulated connection between the double levers 53 and 55 «The double lever 55 with its fulcrum 56 has a hollow 57, which is in contact with the shaft 58 arranged on the shaft Cam plate 59 asked “The tension spring 61, which is attached to the hooks 60 and double levers 53 attached to the machine frame, ensures that the tension spring 61 constant contact of roller 57 on cam 59 The shaft shaft 58 rotates in relation to the crankshaft, not shown, 3: 1 · The cam disk 59 is designed so that after each crank rotation the thread cutting device 20 is lowered into the cutting position ζ Fig. 5) when the sley 29 is stopped The gripper shuttle shown in FIGS. 10 to 13 has a shuttle body 62 with shuttle tips 63 'on the base of the recess 64, which is open at the top, are intended to accommodate the rocker 65 serving bearing 66 attached. One arm of the rocker 65 is used as an opening bracket 47 while the other arm is symmetrical and in both The upper clamp part 67 with the catching noses 68 carries the shooter running directions. The upper clamp part 67 forms with the on the main body of the shooter 62 fastened the lower part of the terminal 69 the contactor terminal 48

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surfaces 70 of the lower clamp part 69 and the catches 68 of the upper clamp part 6? result in the longitudinal direction of the gripper sliding against each other offset inlet openings 71 for the weft threads 3 and 4, with downstream clamping surfaces 72 and 73. The fixed with the rocker 65 The connected upper terminal part 67 is under the tension of the springs 74 on the lower part of the clamp 69. The upper clamp part 67 is provided with two staggered in the longitudinal direction of the gripper guard Wedges 75 provided, which rise in the weft threading direction and the Increase the clamping effect on the weft threads 3 and 4 * The lifting of the shooters clamp 48 takes place through the opening cam 25 and 26 (Fig. 3), which press down the opening bracket 47 against the pressure of the springs 74, whereby The upper clamp part 67 lifts off the lower clamp part 69 via the rocker 65. The main body of the shooter 62 is designed so that between Opening bracket 47 and contactor terminal 48 have a recess 76 over the entire Length of the hook protection results in which the thread guide members 17 and 18 when the grab shooters 21 and 22 fly by and the Weft threads 3 and 4 put the contactor clamps 48 (Fig. 8), for the The wedges 75 are accommodated in the lower part of the clamp 69, recesses 77 are provided «

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Claims (8)

Protection claims: 1. Loom with removal of the weft threads from stationary bobbins for Weaving two lengths of fabric on top of each other, in particular. in which there is only one single-cell contactor box on each side of the machine and the two are mutually exclusive Set the shuttle boxes alternately on the shed for the purpose of performing a cross stitch with the rapier shuttle, thereby characterized in that thread guide members (17; 18) rigidly connected to the sley (29) are arranged on the entry sides in such a way that that the weft threads (3 J 4) in the upwardly open and in .Schußrichtung continuous recesses (76) of the rapier guards (21; 22) can be brought that on the sley (29) for the registered Weft threads (3 »4) reacting to the change of the shooting box and retraction levers (11; 12) which can be lowered under the influence of their own mass are arranged so that the retraction levers (11; 12) through the Contactor boxes (23; 24) can be brought into their starting position and that by means of the thread guide members (17; 18) between the fabric edges the insertion sides and the weft bobbins (1; 2) running weft threads (3.4) can be tightened « 2 »Loom according to claim 1, characterized in that the thread guide elements (17; 18) consist of holding parts (41; 42) on which Eyes (45; 46) with their openings on the shop lanes (43; 44) pointing, are attached, the distance between the eyelets (45; 46) and the shutters (43; 44) being adjustable, 3 · Loom according to claim 1, characterized in that the retraction lever (11; 12) are articulated to loosely rotatable shafts (33) in bearings (35; 36) fixedly connected to the sley, on which to create a dependency relationship between the retraction levers (11; 12) and the contactor boxes (? 3} 24) drive pins (15 »16) are rigidly arranged, corresponding to the contactor box movement with the contactor box (23; 24) temporarily received contact 4, loom according to claim 1 and 3, characterized in that the on the weft threads (3; 4) acting dead weight of the retraction lever (11; 12) can be adjusted by changing the load arm. 69212 -13- 5. Loom according to claim 1 and 3 »characterized in that the FadenfUhrungsösen (13; 14) of the retraction lever (11; 12) between rigid Leitorgaaen (9; 10) attached to the sley and around the pivot point the retraction lever (11; 12) pivotable guide elements (7; 8) are arranged and the distance between the pivotable guide elements (7 »8) and whose thread guide eyelets (13; 14) are adjustable 6. Loom according to claim 1 and 3 to 4 _t, characterized in that the retraction length of the inserted weft threads (3 »4) by means of non-rotatable about the pivot point of the retraction lever (11; ^ 2) pivotable stop pins (34) and stationary adjustable stops (38) is determinable " 7. Loom according to claim 1, characterized in that between the weft bobbins (1; 2) and the retraction levers (11; 12) on the sley (29) uncontrolled blocking brakes (5; 6) are arranged « 8. Loom according to claim 1, characterized in that the rapier shuttles (21; 22) contactor terminals (48) have two in the longitudinal direction of the grab guard offset inlet openings (71) «i * having ordered clamping surfaces (72; 73), wherein the clamp upper part (67) including the catching noses (68) is rigidly connected to the opening bracket (4?) And a rocker (65) which can be brought into the clamping position by spring pressure 9 · Loom according to claim 1 and 8, characterized in that the Terminal upper part (6?) With two mutually offset in the longitudinal direction the looper gates (21; 22) are provided with wedges (75) which rise in the drawing-in direction of the weft threads (3; 4) * 10 · Weaving machine according to claims 1, 8 and 9, characterized in that im Clamp lower part (69) for which wedges (75) recesses (77) are provided « -14-