EP0111071A2 - Linear shed multiphase loom with a weaving rotor - Google Patents

Abstract

Stop combs (3) for the weft threads and shed holding elements (7, 7 ') for the high position of the warp threads (K) containing guide combs (4) are alternately arranged on the weaving rotor in the direction of rotation (P). In the running direction of the warp threads (K) in front of the weaving rotor, a control means is provided for the lateral deflection and optional assignment of each warp thread (K) to a shed holder. Each stop comb (3) and each guide comb (4) alternately contains first and second stop blades (5, 5 ') or first and second guide blades (6, 6'). The second stop and guide lamellae (5 ', 6') each have a recess (17, 18) compared to the first (5, 6) at the points of the lamella combs (3, 4) that first dip into the warp threads (K) when the weaving rotor rotates ) and the lateral deflection of the warp threads (K) by the control means reaches its maximum after immersing the first stop or guide slats (5, 6). This ensures that the warp threads are read in reliably, even at high warp densities, and that no reading errors can occur due to the warp threads jumping over into an adjacent tube.

Description

The invention relates to a row shed weaving machine with a weaving rotor on which, in the direction of rotation, alternately stop combs formed by stop lamellae for the weft threads and guide combs formed by guide lamellas for the warp threads and containment elements for the high shed position of the warp threads are arranged, and with a in the running direction of the warp threads before Webrotor arranged control means for lateral deflection and optional assignment of each warp thread to a shed holder.

In a row shed weaving machine of this type known from US Pat. No. 4,290,458, the stop and guide combs are mutually displaced by half a division of the slats. In connection with the control means for the lateral deflection of the warp threads in the weft direction, this means that each warp thread can be applied from left or right to the assigned slat of the previous slat comb in the direction of rotation of the weaving rotor when it is read into the desired tube of a slat comb. This ensures that each warp yarn is read with certainty into the right tube, which previously lenfachwebmaschinen of the weaving rotors of Jleihenfach- and the rotation Rieten of W _el known Parse could be avoided for the first time. This automatically led to a spread of the field of application intended for row shed looms by expanding it to higher warp densities than was previously the case.

However, as soon as the warp density exceeds a certain value, which is around 30 to 40 warp threads per centimeter, read-in errors can occur again, which are caused by a transfer jumping from warp threads into an adjacent wrong tube. The known row shed weaving machine is now to be improved by the invention in such a way that read-in errors are ruled out even with larger warp densities.

This object is achieved according to the invention in that each stop comb alternately contains first and second stop slats and each guide comb alternately contains first and second guide slats, the second stop and guide slats compared to the first at the points of the slat combs which first enter the warp threads during the rotary movement of the weaving rotor each have a recess, and that the lateral deflection of the warp threads by the control means reaches its maximum after immersing the first stop or guide slats.

As a result of the cut-out at the points mentioned, the tube into which the respective warp thread is to be read is twice as wide as it is without these cut-outs at the moment each lamella comb is immersed in the warp thread coulter, so that each warp thread is sure to get into the double-width tube. In the subsequent period until the second stop or guide slats provided with a recess are immersed, the warp threads are laterally deflected even more strongly by the control means and are laterally applied to the first immersed first stop or guide slats which delimit the double-width tube. As a result, the warp threads are positively guided into the then normal-width tube when the second slats are immersed and are reliably read into it. Reading the warp threads into the double-width tube can be made even easier by arranging the stop and guide combs in a mutually displaced manner, as in US Pat. No. 4,290,458.

• Fig. 1 einen Querschnitt durch einen Webrotor,
• Fig. 2 eine schematische perspektivische Darstellung einiger Lamellen des Webrotors von Fig. 1 mitsamt ihrem Träger, und
• Fig.3,4 je eine schematische Ansicht entgegen der Richtung des Pfeiles P von Fig. 1 zur Funktionserläuterung.

Below we explain the invention with reference to an embodiment and the drawings. Show it:

• 1 shows a cross section through a weaving rotor,
• Fig. 2 is a schematic perspective view of some fins of the weaving rotor of Fig. 1 together with their carrier, and
• Fig. 3.4 each a schematic view opposite to the direction of arrow P of Fig. 1 to explain the function.

1, the weaving rotor of a row shed weaving machine has a hollow roller 1 which extends across the width of the weaving machine and which is supported on its end faces by tubular stubs 2 mounted on the machine frame (not shown). During operation, the weaving rotor rotates in the direction indicated by an arrow P in the figure. The structure and mode of operation of a series shed weaving machine with a weaving rotor are assumed to be known and are not explained in more detail here; in this connection reference is made to US Pat. No. 4,290,458.

On the shell of the Ilohlwalze 1 parallel to its longitudinal axis stop and guide combs 3, 4 are arranged. The stop combs 3 contain first and second stop slats 5, 5 'for striking the inserted weft threads, the guide combs 4 contain first and second guide slats 6, 6' for the warp threads K.

When the weaving rotor rotates in the direction P, the lamella combs 3 and 4 first immerse themselves in the warp threads K at the corners of the first lamellae 5 and 6, which are denoted by 15 and 16. The second slats 5 'and 6' differ from the first slats 5 and 6 in that they each have a cutout 17 or 18 at these points which first dive into the warp threads. These recesses are formed by the fact that, in the case of the second lamellae 5 ', 6', the points first immersed in the warp threads with respect to the corresponding points 15, l6 of the first lamellae 5 and 6 in the direction of rotation P of the weaving rotor by a few, preferably by 2 to 7 Are set back millimeters. According to the illustration, this is achieved in that either the corresponding slat corner is chamfered, as in the second guide slats 6 ', or in the same way as in the second stop slats 5', these slats have a smaller width than the first stop slats, in that the slat edge which is at the front in the direction of rotation P. is set back. The first and second fins 5, 5 'and 6, 6' are arranged alternately within each fin comb 3, 4.

The guide slats 6, 6 'are provided with shed retaining elements for the high shed position of the warp threads K, which are formed by projections 7, 7' projecting laterally from the guide slats. Each first guide plate 6 is provided with a projection 7 and every second guide plate 6 'is provided with a projection 7', which protrude from the guide plates 6, 6 'on different sides and are offset with respect to one another in the warp direction. In each guide comb 4 each tube, that is, the space between adjacent guide fins 6, 6 'is alternately provided for the up or down position of the warp threads K. In each tube provided for the high compartment position, the respective compartment holding member is formed by two projections 7, 7 ′ projecting against each other. Because of the offset of these projections in the warp direction, the tube width can be adjusted between the single and double the value of the laterally protruding height of the projections 7, 7 '.

In the direction of rotation P of the weaving rotor, between each guide and stop comb 4 or 3 at the location of the maximum compartment opening, there is a guide channel F delimited upwards by the projections 7, 7 ', in which the weft insertion takes place. Since in principle any known weft insertion method, for example with rapier shooters, projectile, bar gripper or air, can be used on a row shed loom with the weaving rotor shown and the weaving rotor shown is not restricted to a specific weft insertion method or is specific to this, this will not be discussed in more detail here. For a particularly suitable weft insertion system with air, reference is made to CH Patent Application No. 1 039 / 82-7 by Maschinenfabrik Rüti AG.

The first and second stop plates 5, 5 'of the stop combs 3 on the one hand and the first and second guide plates 6, 6' or guide combs 4 on the other hand are each aligned and the alignment lines of the individual guide plates 6 and 6 'run in the middle of the tube of the stop plates 5 and 5 'and vice versa. The stop plates 5, 5 'of the stop combs 3 are thus along the first and the guide plates 6, 6' of the guide combs 4 are arranged along the second circumferential circles on the hollow roller 1 and both types of circumferential circles are mutually divided by half, that is by one half pipe width shifted. Corresponding first stop lamellae 5, corresponding second stop lamellae 5 ', corresponding first guide lamellae 6 and corresponding second guide lamellae 6' of all lamella combs 3 and 4 are respectively in common planes, that is to say they are in each case in alignment with one another. The hollow roll 1 is on its jacket with a number of swallows parallel to the roll axis corresponding to the number of guide channels F. Tail grooves provided, which is each provided for receiving a common support for a stop and guide comb 3, 4.

According to FIGS. 2 and 2, this carrier consists of two mutually parallel rails 8, 9, of which the rail 9 is provided with a dovetail corresponding to the dovetail groove mentioned. The rail 9 is distributed over its length at intervals of approximately 5 to 10 cm with threaded bores, into each of which a countersunk screw 10 is screwed, which protrudes with one end from the rail 9 and presses against the rail 8. The distance between the two rails 8 and 9 can be adjusted by turning the screws 10.

Each lamella 5, 5 'and 6, 6' has two fastening legs which enclose a mouth 11 and 12, which partially surrounds the rails 8, 9. The mouth 11, 12 of each lamella 5, 5 'or 6, 6' is delimited at the end of each fastening leg by a projection. These projections are provided for snapping on two diagonally opposite edges of the two rails 8 and 9. The width of the mouth 11, 12 and the cross section of the rails 8, 9 are dimensioned such that when the screws 10 are loosened, that is to say when the two rails 8 and 9 are at a small mutual distance from one another, the lamellae 5, 5 'and 6, 6' with their Attachment legs on the rails 8, 9 and then know to be fixed by adjusting the screws 10.

Each carrier formed by the rails 8, 9 carries two lamella combs which are displaced relative to one another by half a pitch or tube width, a stop comb 3 with first and second stop lamellae 5, 5 'and a guide comb 4 with first and second guide slats 6, 6 '. Each carrier is fixed in its dovetail groove.

As can be seen in FIG. 1, the geometry of the lamellar combs 3, 4 on the weaving rotor is designed such that when a warp thread K alternately assumes the high or low position in the guide channels F, that is, always between the projections 7, 7 ' of a certain and the next but one guide comb 4 is tensioned, the point of intersection of the warp thread sheets is always in the space between the stop and guide comb 3 or 4 of each pair of lamella combs carried by a common carrier. With large warp densities, i.e. small distances in the weft direction between the slats, this facilitates the shed movement of the warp threads K.

If the warp threads K loop around the weaving rotor in this way and, moreover, as seen in the weft direction, always alternately assume the high or low position within each guide comb 4, then this corresponds to a 1/1 or plain weave. In this case, the warp threads K, due to their tension between the projections 7, 7 'of the different guide combs 4, automatically assume the low position in every second guide channel F. It would therefore not be necessary for this binding to have any special shelf holding devices.

For other bindings, that is to say for all those cases where warp threads K in the pairs of lamella combs which follow one another in the rotational direction of rotation P, the specialist holding members are required for the deep compartment position. According to the illustration, these are formed by an elongated member 13 running parallel to the lamellar combs in the form of a rod or a tube. The organ 13 is in each pair of lamella combs 3, 4 is stored at the point of intersection of the warp thread coulters. According to the illustration, the guide plates 6, 6 ′ are each provided with a recess 14 for holding the organ 13, which preferably extends in one piece over the entire length of the plate combs 3, 4.

FIGS. 3 and 4 show, on the basis of a schematically illustrated processing of a stop comb 3 and a guide comb 4 with the control means for the lateral deflection of the warp threads K, their reading into the slat combs and the function of the second stop and guide slats 5 provided with the cutouts 17 and 18 ', 6'. The two figures represent two different stages of the import process.

It can be seen that the two fin combs 3 and 4 with the fins 5, 5 'and 6, 6' are mutually displaced by half a pitch or tube width. There is a warp thread K in each tube of each of the two lamella combs.

The warp threads K are guided in the direction of the warp threads arranged in front of the weaving rotor shed bars 19 and 20 and run from these to the lamellar combs 3 and 4. Each shed bar 19, 20 leads in each case to the same binding warp threads K, that is to say warp threads, each together in the top - or lie in the sub-compartment. The individual slats 5, 5 ¹ and 6, 6 'are each symbolized by a thick full line, the recesses 17 and 18 on every second stop and guide slats 5' and 6! are not fully extended, but bordered with thin lines.

3 and 4, the guide comb 4 under consideration is fully immersed in the warp threads K, and the stop comb 3 in FIG. 3 begins its immersion movement. Due to the fact that every second stop lamella 5 'is provided with a recess 17, the warp threads K do not have to be read into a normal-width tube A in the first stage of immersion shown in FIG. 3, but can be read into a double-width tube 2A. The same applies to the immersion of the guide combs 4 with the tubes B. It is obvious that the double-width tubes considerably increase the security of the correct reading in of the warp threads K.

For this first stage of the reading (FIG. 3), the shed forming rods 19, 20 designed as toothed racks have been moved by their drive in such a way that the warp threads K assume the positions shown. The warp threads K guided by the shedding rod 19 were moved to the left (arrow C) and the warp threads K guided by the shedding rod 20 were moved to the right (arrow D), in each case into a position where they were certainly in the double-width tubes width 2A can be read.

Until now every second lamella 5 'of the stop comb 3 provided with a recess 17 also dips into the warp threads, a certain period of time passes in which the second stage of the reading takes place. In this second stage (FIG. 4), the shedding bars 19, 20 are moved further by their drive in the previous direction until the warp threads K on the parts which have already been immersed in the region of the points 15 (FIG. 1) of the first delimiting the double-width tube 2A Stop slats 5 rest and assume the position shown in Fig. 4.

Then a small further movement of the shed bars 19, 20 can take place in the previous direction so that the warp threads K also rest securely on the above-mentioned slats 5. Upon further immersion of the stop comb 3, the warp threads K now slide along the first stop slats 5 and are thus positively guided into the correct tube A when the second stop slats 5 'provided with the recesses 17 are inserted, so that any incorrect reading in is definitely ruled out. Before the next following guide comb 4 is immersed, the shedding bars 19, 20 are moved in the opposite direction as before, whereupon the warp threads K are again read in two stages in the manner described.

The two stages of reading in the warp threads K can run in a continuous process and merge into one another, but they can also be carried out discontinuously, that is to say in two separate steps. It is essential that _{s is} read into a double-wide type in a sort of presorting during the first stage and then into the final, normal-width tube during the second stage, with the warp threads K being positively guided into the tube in the second stage.

If, in contrast to FIGS. 3 and 4, not just one but two warp threads were present in each tube, which would correspond to a double-stitch plain weave, then these two warp threads K could be guided in two different shed forming rods. These would then be moved in opposite directions, so that in the second stage of reading in, the described positive guidance on the fins delimiting the tube is ensured.

The invention is not limited to the arrangement of two lamellar combs 3, 4 shown on a common carrier, and of course each stop and guide comb 3, 4 could be arranged on the hollow roller 1 in a suitable manner. Likewise, the shape of the organ 13 (FIG. 1) is arbitrary within wide limits; for example, the compartment holding members for the low compartment position could also be formed by projections on the stop or guide slats. In any case, however, it is advantageous if these shed retaining elements are arranged at the point of intersection of the warp thread sheets. The location of this crossing point can also vary and depends on the selected geometry. The crossing point could also lie within the stop or guide combs 3 or 4. In this case, the relevant stop or guide lamellae 5 or 6 would have a corresponding bore through which the organ 13 would have been pushed, or they would be provided at the corresponding point with projections serving as a specialist organ for the lowering of the warp threads.

Likewise, it is not absolutely necessary that the stop and guide combs 3, 4 are mutually displaced by half a division, because up to a certain value of the warp density the warp threads can be read into the double-width tubes without this displacement. The mutual displacement has the advantage, however, that even in the first stage of the reading-in there is a kind of positive guidance of the warp threads in that they can be brought to the side against the fins that delimit the tube in the previously immersed fin comb. If one already deflected the warp threads K sideways so far in the first stage that they get into their final tube with certainty, then with large warp densities, warp threads K could jump into an adjacent wrong tube. This danger is eliminated by the cut-out on every second lamella, since this ensures reliable reading into a double-width tube even with a slight lateral deflection of the warp threads.

Claims (10)

1. Row shed weaving machine with a weaving rotor on which, in the direction of rotation, alternately stop combs formed by stop lamellae for the weft threads and guide combs formed by guide lamellas for the warp threads and shed retaining elements for the high position of the warp threads are arranged, and arranged in front of the weaving rotor in the running direction of the warp threads Control means for the lateral deflection and optional assignment of each warp thread to a shed holding element, characterized in that each stop comb (3) alternately first and second stop plates (5, 5 ') and each guide comb (4) alternately first and second guide plates (6, 6') contains, the second stop and guide lamellae (5 ', 6') with respect to the first (5, 6) at the points (15, 16) of the lamella combs which first immerse in the warp threads (K) during the rotary movement of the weaving rotor (17, 18), and that the lateral deflection of the warp threads by the control mitit tel (19, 20) reaches its maximum after immersing the first stop or guide slats. 2. Row shed loom according to claim 1, characterized in that the depth of each recess (17, 18) is a few, preferably two to seven millimeters. 3. Row shed weaving machine according to claim 2, characterized in that the cutouts are formed by a bevel (18) of the point of every second lamella (6 ') which first dips into the warp threads (K). 4. Row shed loom according to claim 2, characterized in that the recesses (17) are formed in that the foremost edge in the direction of rotation (P) of the weaving rotor of each second lamella (5 ') is set back. 5. Row shed weaving machine according to claims 3 and 4, characterized in that every second stop lamella (5 ') of each first stop comb (3) one through a recessed front edge (17) and every second guide lamella (6') of each guide comb (4) one through has a bevel (18) formed recess. 6. Row shed weaving machine according to claim 2, characterized in that corresponding second stop lamellae (5 ') of all stop combs (3) are aligned with one another and are arranged in common planes lying transversely to the longitudinal axis of the weaving rotor. 7. Row shed weaving machine according to claim 6, characterized in that corresponding second guide lamellae (6 ') of all guide combs (4) are aligned with one another and are arranged in common planes lying transversely to the longitudinal axis of the weaving rotor. 8. Row shed weaving machine according to claim 7, characterized in that the second stop lamellae (5 ') of the stop combs (3) and the second guide lamellae (6') of the guide combs (4) common planes are shifted against each other, the shift preferably half the division (A, B) of the lamella combs. 9. row shed loom according to claim 2 or 8, characterized in that the lateral deflection of the warp threads (K) is controlled by the control means (19, 20) so that the warp threads after immersing the first stop or guide slats (5, 6) and come into contact laterally with the first mentioned slats before the second stop or guide slats (5 ', 6') are immersed. 10. Row shed weaving machine according to claim 9, characterized in that the warp threads (K) experience an additional lateral deflection after their lateral contact with the first stop or guide slats (5, 6).

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