EP0093841A1 - Comb-like lamellae support for weaving machines, in particular for the weaving rotors of multiple longitudinal traversing shed weaving machines, and method of manufacturing them - Google Patents

Abstract

A lamellae comb comprises a carrier or support and lamellae or small plates arranged thereupon which contain lateral projections serving as shed-retaining elements for the warp threads. Each shed-retaining element is formed by a respective projection at the two lamellae enclosing the shed-retaining element. The projections protrude towards each other, conjointly bridge the intermediate space between the lamellae and are mutually offset in the warp direction. Thus, the tube width may be adjusted within wide limits without the lamellae containing the projections having to be exchanged. The lamellae are positioned on the carrier or support by means of racks resiliently supported at the carrier and extending over the weaving or fabric width. The teeth of the racks position the lamellae and have a tooth division or pitch corresponding to the desired tube width of the lamellae. Thus, the lamellae division or pitch does not exhibit any error across the entire weaving width, particularly no summation error, and the lamellae combs can be exactly reproduceably manufactured.

Description

The invention relates to a lamella comb for weaving machines, in particular for the weaving rotor of row shed looms, with lamellae arranged on a carrier and with shed holding elements for the warp threads, which are formed by lateral lamella projections.

In CH patent application No. 1 770 / 82-7 of the applicant of the present application, a lamella comb of this type is described, which can be quickly and easily replaced on the weaving rotor and can be produced with little effort and in a short time, the adaptation to which by changing the article conditional changes in the division of the slats, in other words changes in the warp density, but is still relatively complex.

Because the shed holding elements for the warp threads must bridge the space between adjacent fins, the so-called tube width, each time this tube width is changed, all the fins provided with shed elements must be replaced with those in which the projections are exactly around the new tube width Protruding slats. In addition, a complete set of fins must be purchased and stored for each tube width required for the range of articles in the respective weaving mill.

The invention is intended to improve the lamella comb described at the outset in such a way that it can be adapted to changing warp densities and thus to changing tube widths without the need to replace the lamellae provided with compartment-holding members.

This object is achieved according to the invention in that each compartment holding member is formed by a projection of the two lamellae enclosing the compartment holding member, which protrusions protrude from one another, bridge the gap between these slats together and are offset from one another.

Due to the inventive design of the compartment holding members by two mutually protruding and mutually offset projections, the tube width can be adjusted continuously and arbitrarily between a value corresponding to the height of one of the projections and a value corresponding to the sum of the heights of both projections. In the former case the two projections overlap completely and in the latter case their free end faces are aligned with one another. If, for example, the height of each projection is 0.8 mm and there are two warp threads in each tube, an article spectrum between approximately 20 and 10 warp threads per centimeter can be covered with a single set of fins. If the warp threads are drawn in less densely, for example only one warp thread per tube, the article range is between 20 and 5 warp threads per centimeter.

The invention further relates to a method of manufacture. of the lamella comb described, in which the lamellas are attached to the carrier, positioned with the desired division and then fixed on the carrier.

Since on the weaving rotor of a row shed weaving machine there are always several, generally more than ten, lamella combs of this type, it is necessary that these are as identical as possible and in particular have the same length.

However, it is known from the manufacture of reeds for single-phase weaving machines that they are practically not exactly reproducible, because the slightest error in the thickness of the wire used as a spacer element and the smallest unevenness in the blade teeth have the effect of a sum error, so that "identical" reeds also result a usual width of about 180 cm have differences in the order of millimeters.

The same problem exists with lamellar combs for in-line weaving looms, but there is also the fact that even the most precise gauges are not helpful in their manufacture, because the tube width in the lamella combs known to date is determined by the width of the shed holding elements. Because you can not make the tube narrower than the width of the compartment holding members, because this prevents the compartment holding members. But of course not further, because then the shed retaining elements would no longer bridge the entire tube and the warp threads between the shed retaining element and the adjacent lamella could slip through without the shed retaining element.

The lamella comb according to the invention, in which each compartment holding element is formed by two protruding projections, now makes it possible for the first time to produce a lamella comb in which the pipe width is not determined by the height of the compartment holding elements.

The invention is intended to provide a production method for such a lamella comb in which the sum error mentioned no longer occurs, that is to say the lamella comb can be reproduced exactly.

This object is achieved according to the invention in that the lamellae on the carrier with the aid of a parallel positioned to the carrier organ, which organ is provided with guide means for the slats, the division of the guide means corresponding to the desired division of the slats.

By using the above-mentioned organ with the guide means for the lamellae, the division of which corresponds to the desired division of the lamellae, any type of spacer elements arranged between the lamellae can be dispensed with, as a result of which the above-mentioned sum error is excluded a priori. If, for example, the organ is in the form of a rod and the guide means are formed by grooves, then at the most there can be an error caused by the machine tool used to produce the grooves. In any case, this would be negligibly small and, in addition, the same size for all rod-like organs machined on the same machine tool, so that the organs and thus the lamellar combs are exactly the same in this worst case.

• Fig. 1 eine stirnseitige Ansicht eines Trägers mit zwei Lamellenkämmen in vergrössertem Massstab, ,
• Fig. 2 eine Ansicht in Richtung des Pfeiles II von Fig. l, und
• Fig. 3 eine schematische perspektivische Darstellung des Trägers von Fig. 1 mit drei darauf zu montierenden Lamellen.

The invention is explained in more detail below using an exemplary embodiment and the drawings. Show it:

• 1 is an end view of a carrier with two lamellar combs on an enlarged scale,
• Fig. 2 is a view in the direction of arrow II of Fig. 1, and
• Fig. 3 is a schematic perspective view of the carrier of Fig. 1 with three slats to be mounted thereon.

The figures show a lamella comb for the weaving rotor of a row shed weaving machine, which consists of a carrier 1, a stop comb 2 and a guide comb 3, both combs being shifted by half a pitch. 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. In this patent, the mutual displacement of the two combs 2 and 3 by half a division is described in detail.

Since in principle any known weft insertion system can be used on a row shed weaving machine and the lamella comb shown in the figures is not limited to a specific weft insertion system or is specific for this, this will not be discussed either. For a particularly suitable weft insertion system with air, reference is made to CH patent application 1 039 / 82-7 by the applicant of the present application.

According to the figures, the stop comb 2 consists of stop slats 4 for striking the weft threads and the guide comb 3 consists of guide slats 5 for the warp threads. The guide lamellae 5 are provided with shed retaining elements which fix the, high or low position of the warp threads and hold the warp threads in their high or low position over their entire wrap angle on the weaving rotor.

In Fig. 2, in which the individual fins are drawn exaggerated thick, the tube between two adjacent guide fins 5 is designated B and that between two adjacent stop fins 4 is designated C and one can see the mutual displacement of the two fin combs 2 and 3 (Fig. 1) with the slats 4 or 5 by one half pipe width. As shown, there are two warp threads K in each tube of each of the two lamella combs, in the tube B between two guide lamellae 5 both warp threads K are located together either in the up or down position, in the tube C between two stop lamellae 4 there is a warp thread K in each case in the high and the other in the low position. This representation corresponds to a double-stitch plain weave.

The compartment-holding members for the warp threads K are formed by projections projecting laterally from the guide lamellae 5. Each guide plate 5 is provided with a first projection 6 or 6 'serving as a compartment holding element for the high position and with a second projection 7 or 7' serving as a compartment holding element for the low position. The first projection 6, 6 'is formed by a bent part on one edge of the guide slats 5, the second projection 7, 7' is formed in that a kind of window is punched out of the guide slats 5 on three edges and bent around its fourth edge is. Since the compartment-holding members for the up and down compartments are always arranged in different tubes, the first and second projections 6, 6 'and 7, 7' respectively project away from the guide plates 5 on different sides.

Each compartment-holding member is formed by two first or second projections 6, 6 'or 7, 7' arranged on the guide fins 5 delimiting the respective tube. The two projections, each forming a compartment-holding member, project against one another (FIGS. 2, 3) and are offset with respect to one another in the warp direction, which corresponds approximately to the direction of arrow II in FIG. 1. The aforementioned lamella comb 3 is thus composed of two types of guide lamella 5: From guide lamellae 5 with a first projection 6 against the weft direction A and with a second projection 7 in the weft direction A and from guide lamellae 5 with a first projection 6 'in the weft direction A and with a second projection 7' against the weft direction A.

The formation of the compartment holding members by two mutually protruding and mutually offset projections 6, 6 'or 7, 7' enables the use of a single set of fins for different pipe widths by reducing the pipe width by moving the guide fins 5 from a minimum value, in which the projections 6, 7; 6 ', 7' of one guide lamella 5 each abut the adjacent guide lamella 5 with its free end face, that is to say they overlap to a minimum value, up to a minimum value at which the said end faces are aligned with one another or the projections 6, 7; 6 ', 7' just overlap.

The carrier 1 for the lamellar combs 2, 3 (FIG. 1) consists, as shown, of two parallel rails 8 and 9, which extend over the weaving width, one of which is provided with a dovetail 10. The dovetail 10 is provided for insertion into a corresponding groove on the casing of the weaving rotor (not shown). The rail 8 carrying the dovetail 10 is distributed over its length at intervals of approximately 3 to 10 cm with threaded bores 11, into each of which a countersunk screw 12 is screwed, which projects with one end out of the rail 8 and against the rail 9 presses. By turning the screws 12, the distance between the two rails 8 and 9 and thus the cross section of the carrier 1 can be adjusted.

Each lamella 4 and 5 has two fastening legs 13 or 14 which enclose a mouth 15 and 16 which partially surrounds the rails 8 and 9. The mouth 15, 16 of each lamella 4 and 5 is delimited at the end of each fastening leg 13 and 14 by a projection 17 and 18, respectively. The projections 17 and 18 are provided for latching on two diagonally opposite edges of the two rails 8 and 9. The width of the mouth 15 and 16 and the cross section of the rails 8 and 9 are dimensioned such that when the screws 12 are loosened, that is to say when the two rails 8 and 9 are at a small mutual distance from one another, the slats 4, 5 with the fastening legs 13 and 14, respectively, over the Rails 8, 9 inserted and can then be fixed by adjusting the screws 12. The inner edge of one fastening leg 13 or 14, which runs perpendicular to the screws 12, is of the same length as the corresponding dimension of the rail 9 and the inner edge of the other fastening leg 13 or 14, which runs parallel to the screws 12, is longer than the sum of the corresponding dimensions of the two Rails 8 and 9.

Each carrier 1 formed by the rails 8, 9 carries two lamella combs 2 and 3 (FIG. 1) displaced relative to one another by a half pitch or tube width B or C with stop lamellae 4 or guide lamellae 5. The fastening legs 13 and 14 of the two lamella types are like this oriented that the fastening legs parallel to the screws 12 of one type of lamella encompass the rails 8, 9 on one side and the same fastening legs of the other type of lamella encompass the rails 8, 9 on the other side wall thereof.

The lamella combs are produced in such a way that the individual lamellae 4 and 5 are placed on a pair of rails 8, 9 with a length corresponding to the length of the loom rotor outside the weaving machine. The screws 12 are loosened so far that they can be easily attached. As can be seen from FIGS. 2 and 3, a stop plate 4 and a guide plate 5 are alternately attached, in the latter alternately a guide plate 5 with projections 6, 7 and one with projections 6 ', 7'.

As soon as the slats 4 and 5 are slid onto the rails 8 and 9 over a length corresponding approximately to the distance between two adjacent screws 12, the screw 12 in question is tightened, as a result of which the slats 4, 5 are clamped on the rails 8, 9. In this way, the slats can be plugged in continuously and the slat combs can be continuously fixed.

Before the fins 4, 5 are fixed, they have to be positioned on the rails 8, 9 with exact observance of their mutual spacing, the pipe width or pitch. This positioning is carried out with the aid of rod-like organs which are arranged parallel to the support 1 and are provided with guide means for the slats, the division of the guide means corresponding to the desired division of the slats. These organs are preferably formed by racks, the teeth of which have the desired division and a triangular or trapezoidal profile. These racks can form part of a teaching and can be clamped together with the carrier 1 in such a way that the racks are positioned with respect to the carrier 1 such that the slats 4 and 5, when they are plugged onto the carrier 1, are straight with their in Fig. 1 are engaged with their rack upper outer edge. The slats 4 and 5 positioned in this way can then. are glued to the rails 8, 9 by a suitable adhesive which is soluble in heat or a liquid. If the division of the lamellar combs is to be changed, the adhesive connection can be released by exposure to heat or the solvent.

Another example of the arrangement of the toothed racks is shown in the figures, namely they are embedded in the carrier 1. As shown, the rod 9 is provided with two parallel longitudinal grooves 19 and 20 on its outer surface adjacent to the inner edge of the fastening leg 13 or 14 running perpendicular to the screws 12, and the rod 8 has a longitudinal groove 21 on each of its two side surfaces lying parallel to the screws 12. 22 on. Each of the grooves 19 to 22 is provided for receiving a rack 23 to 26 extending over the entire length of the carrier 1 and thus over the weaving width and between the bottom of each groove 19 to 22 and its rack 23 to 26 there is an elastic insert, as shown a rubber cord 27 to 30 of about 2 mm in diameter is arranged.

For each lamella comb 2, 3 (Fig. 1), a pair of racks 23, 26 and 24, 25 is provided, in which the lamellae 4 or 5 are each guided in the region of their two projections 17 and 18. On the inner edge of their inner leg running perpendicular to the screws 12, the lamellae 4, 5 each have a gradation 31 or 32, with which they grip around the toothed rack 24 or 23 assigned to the other lamella 5 or 4 from the outside and therefore not in Contact with the toothing projecting outwards from the carrier 1.

The depth of the grooves 19 to 22, the height of the toothed racks 23 to 26 and the height of their toothing and the thickness of the rubber cords 27 to 30 are coordinated with one another in such a way that the teeth of the toothed racks before the slats 4, 5 are fitted onto the carrier 1 slightly protrude the side surfaces of the rails 8, 9 provided with grooves 19 to 22. As a result, the slats 4, 5 are pushed against the pressure of the rubber cords 27 to 30 and these press the toothing of the toothed racks 23 to 26 fully against and between the slats 4, 5, as a result of which they are always securely positioned.

Due to the fact that the racks 23 to 26 extend over the entire weaving width, the slats 4, 5 are positioned without any sum error, i.e. incorrect influences due to deviations in the thickness or flatness of the lamellae 4, 5 cannot add up. An error could only affect the machine tool on which the toothing was produced. But on the one hand this is very unlikely and on the other hand it is still without influence, because such an error would be the same for all racks 23 to 26 of a production lot.

If the tube width has to be changed when changing the article, then the racks 23 to 26 only need to be replaced. The fins 5 with the compartment holding members can be adapted to the new pipe width within wide limits because of the overlapping projections 6, 6 'and 7, 7', the fins 4 also only need to be repositioned. Of course, the projections 6, 6 '; 7,7 'not necessarily in the warp direction, but could also be offset with respect to one another in the radial direction with respect to the weaving rotor. In this case, the projections 6, 6 'or 7, 7' would lie one above the other.

Claims (18)

1.Lamellar comb for weaving machines, in particular for the weaving rotor of row shed looms, with slats arranged on a support and with shed holding elements for the warp threads, which are formed by lateral slat projections, characterized in that each shed holding element is each provided with a projection (6, 6 '; 7 , 7 ') of the two lamellae (5) enclosing the compartment holding element, which protrusions protrude against one another, jointly bridge the space between these lamellae and are offset from one another. 2. lamella comb according to claim 1, characterized in that the projections (6, 6 '; 7, 7') are offset from one another in the warp direction. 3. lamella comb according to claim 2, characterized in that the alignment lines of the free end faces of the projections (6, 7; 6 ', 7') overlap each other. 4. lamella comb according to claim 3, characterized in that the projections (7, 7 ') are designed in the manner of an approximately rectangular window sash which is folded out of the lamellae (5) and is punched out on three edges and bent over its fourth edge. 5. slat comb according to one of claims 1 to 4, characterized in that on the carrier (1) of the slats (5: a positioning member is arranged which has guide means for the slats, the division of the desired division (B, C) of the slats corresponds. 6. lamella comb according to claim 5, the support of which is formed by two parallel rails extending over the weaving width, characterized in that the positioning member is formed by a rod (23, 26) mounted in a rail (8, 9) and extends over the weaving width is and the guide means are groove-like. 7. lamella comb according to claim 6, characterized in that the rod (23 to 26) is designed as a toothed rack with teeth extending transversely to the longitudinal direction of the rod, which teeth form the said guide means and are provided for engagement with the lamellae (5). 8. lamella comb according to claim 7, characterized in that the toothed rack (23 to 26) with its toothing is pressed elastically against a fastening part (14) of the lamellae (5). 9. lamellar comb according to claim 8, characterized in that the rack (23 to 26) in a corresponding longitudinal groove (19 to 22) of the rail (8, 9) is mounted and slightly overhangs the rail with its toothing in the idle state, and that between a rubber cord (27 to 30) is arranged at the bottom of the groove and the toothed rack. 10. A lamellar comb according to claim 9, the lamellae of which have two muzzle-like, perpendicular to each other fastening legs and the carrier has a rectangular cross-section, characterized in that in each rail (8, 9) a rack (23 to 26) is provided , wherein each rack of this pair is in engagement with a respective attachment leg (14) of the slats (5). 11. lamellar comb according to claim 10, characterized in that the two rails (8, 9) of the pair with the fastening legs (14) in the region of the end thereof engage and are approximately diagonally opposite one another on the carrier (1). 12. slat comb according to claim 11, with two rows of slats displaced against each other, one row being provided with compartment-holding members for the warp threads and the other row serving to stop the weft threads, characterized in that one for each row of slats (3, 2) A pair of racks (24, 25; 23, 26) is provided, the two pairs with their toothings being displaced relative to one another in accordance with the mutual displacement of the two rows of lamellae, and in that the two pairs are opposite each other on one of the two diagonals of the support (1). 13. The method for producing the lamella comb according to claim 1, in which the slats are placed on the carrier, positioned with the desired division and then fixed on the carrier, characterized in that the lamellae (4, 5) on the carrier (1 ) positioned with the help of an organ arranged parallel to the carrier, which organ is provided with guide means for the lamellae, the division of the guide means corresponding to the desired division (B, C) of the lamellae. 14. The method according to claim 13, characterized in that as the organ for the positioning of the slats (4, 5) for each row (2, 3) of slats a rack extending over the weaving width (23 to 26) used and the toothing used as a guide means for the slats, wherein the toothed rack is pressed elastically with its toothing against an edge of the slats. 15. The method according to claim 14, characterized in that the rack is anchored in a mounting frame in which the carrier (1) is also held and that this anchoring is carried out in such a way that the rack with the outer edge of the slats (4 , 5) is engaged. 16. The method according to claim 15, characterized in that the lamellae (4, 5) in their position positioned by the rack on the carrier (1) fixed by a heat or solvent-releasable fastener and removed after the fixing the rack. 17. The method according to claim 14, characterized in that the toothed rack (23 to 26) is mounted on the carrier (1) in such a way that it engages with an inner edge of the lamellae (4, 5) resting on the carrier. 18. The method according to claim 17, wherein the slats are fixed on the carrier by adjusting its cross section, characterized in that the racks (23 to 26) are left after the fixing of the slats on the carrier (1), the racks in this position are still in engagement with the slats (4, 5).

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