US3477475A

US3477475A - Weaving loom

Info

Publication number: US3477475A
Application number: US682881A
Authority: US
Inventors: Rudolf H Rossmann; Edgar Strauss
Original assignee: Individual
Current assignee: Ruti Machinery Works Ltd; Maschinenfabrik Rueti AG; U T L Inc
Priority date: 1966-11-22
Filing date: 1967-11-14
Publication date: 1969-11-11
Anticipated expiration: 1986-11-11
Also published as: GB1136690A; DE1710314A1; CS156412B2; DE1710314B2; CH463421A; DE1710314C3; BE706815A

Description

Nov. 11, 1969 5. oss ETAL WEAVING LOOM 4 Sheets-$heet 1 Filed NOV. 14, 1967 Fig.1

R. H. ROSSMANN ET AL 3,477,475

Nov. 11, 1969 WEAVING LOOM 4 Sheets-Sheet 2 Filed Nov. 14, 1967 Nov. 11, 1969 R. H. ROSSMANN ET AL 3,477,475

WEAVING LOOM Filed NOV. 14, 1967 4 Sheets-Sheet 3 Fig. 3

Nov. 11, 1969 R. H. ROSSM-ANN ET AL. 3,477,475

WEAVING LOOM 4 Sheets-Sheet 4 Filed Nov. 14, 196'? NM mm 5 w mm United States Patent US. Cl. 139-12 18 Claims ABSTRACT OF THE DISCLOSURE An arrangement on a weaving loom for the actuation or control of reed dent lamellae which extend through the shed, including a bearing spindle extending perpendicular to the warp threads, the lamellae being arranged along said bearing spindle and being individually pivotal about the spindle, and a guide means for preventing lateral bending of the reed dent lamellae, the guide means lncludmg laminar guide elements arranged between the reed dent lamellae.

The present invention relates to an arrangement on a weaving loom for the actuation or control of reed dents or teeth, which extend through the shed, having a bearing spindle extending parallel to the direction of movement of the shuttle through the shed, said reed teeth being arranged along the length of the spindle and being individually pivotal about the spindle, and means for preventing lateral bending of the reed teeth.

In so-called multiphase weaving, a multiplicity of shuttles travels simultaneously through the shed. Between every two shuttles following one after the other, the shed must be changed and the weft yarn must be beaten up. It is already known to provide reed dents or reed teeth along a spindle extending parallel to the direction of movement of the shuttles, about which said reed teeth are pivotal, the yarn beat up being effected by means of the reed teeth. It is also already known to shape the shuttles in such manner that the reed dents, during their movement in the direction towards the cloth beat-up, press against a side or edge of the shuttles which extends obliquely relatively to the direction of movement of the shuttles, in this way imparting forward movement to the said shuttles.

With this kind of arrangement of reed teeth lamellae, they must be kept thin in the direction of the axis of the spindle. On the other hand, however, they are required, both in respect of their function as reed dents and also in respect of their function as a means for driving the shuttles, to exert a noteworthy force. Particularly in effecting their second function, there is a danger that the lamella-like teeth or reed dens may, when exerting pressure on the oblique shuttle edge, bend in the direction transversely of their longitudinal extension.

This disadvantage is overcome by the present invention. Thus, this invention contemplates an arrangement on a weaving loom in which the reed teeth lamellae are arranged between guide elements of laminar design to prevent lateral bending thereof.

The invention will now be described in greater detail with reference to exemplary embodiments and the accompanying drawings in which:

FIGURE 1 shows an arrangement according to the invention, in its position on the loom, in perspective view;

FIGURE 2 shows the arrangement according to the invention, in an enlarged perspective view of an end portion showing details of construction;

FIGURE 3 shows a section taken along the dot-dash line III-III of FIGURE 2, and

FIGURE 4 shows another embodiment of the arrangement in elevation corresponding to a section that would be taken along the dot-dash line IVIV of FIGURE 2.

In all the figures, like reference numerals designate like elements.

The loom shown in perspective in FIGURE 1 has the warp beam 11. The warp threads 12 extend from the beam over the direction-reversing

rollers

13 and 14 and a warp stop motion 15 and about a shed compensating roller 16. By means of a dobby arrangement (not shown) having substantially horizontal shafts, the warp threads 12 are, immediately after passing the shed compensating roller 16, subjected to shed formation; an open shed being provided at the point of each shuttle 18 and shed shifting taking place between every two adjacent shuttles 18. This position of the material is indicated in the drawings by an appropriate hatching.

The shed formed by the horizontal shafts (not shown) is designated by the reference numeral 17. For the purpose of weaving, there is a multiplicity of shuttles 18 which are moving simultaneously and one after the other through the shed. The shuttles are moved forwards by the dent lamellae 19 (see also FIGURE 2). The lamellae serve also for the beating up of the weft threads inserted against the cloth beat-up 60. The guiding of the shuttles 18 in the shed 17 is effected by means of the warp threads 12. The lamellae 19 are built into the arrangement or apparatus 20 whereof the part 28 is fast on the loom frame 29.

The arrangement 20 is further shown in detail in FIG- URE 2. For producing the movement of the dent lamellae 19, there are two

worm shafts

21 and 22. When the worm shafts 21, 22 rotate, the dent lamellae 19 are pivoted in such manner that each lamella 19 lags behind the one arranged after it by a small amount. In this way the entirety of the lamellae forms a wave movement which propagates from the right (in FIGURE 1) towards the left and by means of which the shuttles 18 are entrained. The woven cloth 23 is wound up on the cloth beam 26 over the take-up roller 24 and the pressing-on roller 25. Reference numeral 27 diagrammatically indicates a templet.

The detailed view given in FIGURE 2 of the arrangement 20 again shows the lamellae 19, the

worms

21 and 22 and the fixed machine element 28. Provided between the individual dent lamellae 19 are, according to the invention, guide elements 30 arranged in such manner that a guide element 30 is arranged on both sides of each dent lamella 19. This is shown by way of example for the dent lamella 19a, wherein the guide element 30a is disposed on one side and the guide element 30b on the other side. The dent lamellae 19 are pivotal about the pivot 48 which is common to all of them. The guide elements 30 are formed with apertures through which

rods

31, 32, 33 and 34 are transversely drawn. These rods serve for retaining the guide elements 30 and connect the entirety thereof to constitute an assembly of guide elements. The individual elements 30 are furthermore retained with precisely predetermined mutual spacing by spacing elements 35. The spacing elements 35 are, in this example, formed by spiral wires, as shown with reference to the rod 31. This rod has the wire spiral 35 wound about it.

The two

worm shafts

21 and 22 are pivotally mounted on the metal element 36. The element 36, on the other hand, is secured by screws 37 (of which only one is shown) in releasable fashion on the machine part 28. The guide elements 30 are formed in the forward and upper portion with a recess 38 by which they may be fitted over the projection 39 on the machine part 28. For securing the guide elements 30 to the part 28 in situ (38, 39) use is made of the rail 40, the entire length of which is not shown and which can be clamped fast by readily releasable winged screws, only one of which, 41, is shown.

In order to secure the guide elements 30, at their rear end, to the machine part 28, an assembly is provided which, in order that it may more readily be understood, is further shown in FIGURE 3 as a section taken along the line III-III of FIGURE 2. The guide elements 30 are, at the position of this cross-section, held together by the rod 34. The spiral wire 42 is provided about the rod as a spacing member. Another rail 44 is secured to the machine part 28 by means of readily releasable wing screws, of which only one screw 43 is shown in FIGURE 2. The rail 44 carries, by means of the screws 45, the carrier members 46, each of which is, for example, shaped as a cube. Formed in each of the elements 46 is a bore and a rod 47 extends through the bores. The guide elements 30, which are disposed at the position of the carrier members 46, are so punched-out that from the rear and from below they extend only as far as the carrier members 46. (As already mentioned, the guide elements 30 are connected by the rods 31 to 34 to form an entire assembly.) The remaining guide elements 30, that is, those positioned between carriers 46, are, however, so dimensioned that they extend over or beyond the zones located laterally of the carriers 46 and thus reach as far as the rail 44 (note FIGURE 4). These elements are therefore also retained by the rod 47 mounted in carriers 46. In this way, the assembly of the guide elements is supported by the rod 47 and the rod is supported by the carriers 46. The carriers 46 are, on the other hand, secured by the screws 45 to the rail 44 and the rail is secured by the wing screws 43 to the fixed machine part 28. The entire arrangement or the assembly of guide elements 30 is thus secured by the screws, in readily releasable manner, to the machine part 28.

During the operation of the loom, the

worm shafts

21, 22 are rotated. In this way, the dent lamellae 19 which, as shown in FIGURE 2, bear permanently at one contact point in each case against the

worm shafts

21, 22, are so guided by the shafts that they carry out a pivoting movement about their bearing spindle 48. In this manner, they carry out, in their entirety, a wave-like movement which, in FIGURES l and 2, travels from the right towards the left. By corresponding shaping of the shuttles 18, in particular by giving the said shuttles a rear edge extending obliquely towards the right in the upward direction, the shuttles are displaced towards the left by the wave-like movement of the dent lamellae, meanwhile receiving from the entirety of warp threads 12 a form of guiding by which they remain Within the shed. At the uppermost point of the movement of the dent lamellae 19, they beat up the threads emerging out of the shuttles against the cloth edge 60 (FIGURE 1). For the sake of clarity, neither the shed nor the shuttles have been shown in FIGURE 2.

Thus, since the dent lamellae 19 are required to produce the movement of the shuttles 18 towards the left, there is a danger that they may be bent. In order to prevent this possibility of bending, according to the invention the guide elements 30 are provided. By appropriate selection of the

spacing elements

35 and 42 and of the spacing elements (not shown) about the

rods

32 and 33, the result is achieved that the spacing between the adjacent guide elements 30 is greater by a minimum amount than the thickness of the dent lamellae 19. In this way, the free movability of the lamellae 19 is maintained and they are protected against lateral bending. If, as shown in this embodiment of the invention, each dent lamella 19 is disposed between two guide elements 30, then the supplementary advantage is achieved that the adjacent lamellae are not able to adhere together. With adhesion of this kind, there is a danger that lamellae may, during their movement, draw with or entrain the adjacent lamellae and in this way detrimentally influence the accuracy of the wave movement of the lamellae 19 and therewith the calm movement of the shuttle 18.

In order to build up the assembly formed from the guide elments 30 and the dent lamellae 19 on the machine, the guide elements 30 are first connected with the rail 44 by the screw 45. Then, the slots 38 are pushed over the projection 39. In this position, the assembly may be suspended from the projection 39, in which case it would not be in the horizontal position shown but would hang downwardly. For the purpose of securing the assembly, it is then pressed against the fixed machine part 28 at the position of the rail 44. In this way, the wing screws 43 may then be inserted. As a further step, the rail 40 is placed in position and is secured to the fixed part 28 by the wing screws 41. By these means, the ends of the guide elements 30, located above the slot 38, are clamped fast between the projection 39 and the rail '40. In this way, a simple mode of securing the assembly formed from the guide elements 30 and the dent lamellae 19 is achieved. This mode of securing has above all the advantage that the assembly can readily be built up and readily dismantled. The dimantling is effected in the reverse sequence relatively to the assembly sequence just described.

The following procedure is used for the insertion of the individual dent lamellae 19: 'First, positioning rods are pushed through the

apertures

50, 51 and 52. Then, the dent lamellae 19 are pushed in between the guide elements and are so pressed-on that they bear against the

rods

50, 51 and 52. In this way, the apertures in the lamellae 19 are positioned in a straight line for the hearing spindle 48, so that the bearing spindle 48 can be drawn through. Then, the

positioning rods

50, 51 and 52 can be taken out.

For the insertion of a wire spiral 35 serving as a spacer element, the spiral 35 is pressed-in at the position of the corresponding rod, for example the rod 31, between the guide elements 30. The rod 31 is pushed forwardly somewhat and, simultaneously with the further pushingforward of the rod 31, the spiral 35 is pressed in further between the elements 30. Correction of the spiral 35 parallel to the edges of the guide elements 30 is therefore quite readily possible. The same applies also to the rod 34 and to the wire spiral 42 shown in FIGURE 3, and also to the remaining spacers and

rods

32 and 33.

As already mentioned, it is the purpose of the guide elements 30 to prevent the bending of the dent lamellae 19. In order to prevent such bending still more satisfactorily, FIGURE 4 shows a further embodiment of the guide elements 30. This figure constitutes an elevational view corresponding to a cross'section of the embodiment at the position of the dot-dash line IVIV of FIGURE 2. In FIGURE 4, the dent lamellae 19 is shown in full lines in its yarn beating-up position. It is pressed into this position by the

worm shafts

21, 22. Shown in broken lines is the dent lamella 19, constituting the other extreme position of the dent lamella 19. FIGURE 4 shows furthermore the already-described metal part 36 for retaining the

worm shafts

21 and 22, a screw for securing the block 36 on the machine part 28, one of the wing screws 41 and 43 for securing the rail 40 or 44, one of the screws 45 carrying the carrier 46 with the rod 47, the

rods

31, 32, 33 and 34 for retaining the guide elements 30, the bearing spindle 48 for the dent lamellae 19, and also the

positioning apertures

50, 51 and 52. This figure also shows the shed 17, a shuttle 18 traveling therein, the cloth beat-up 60 and the cloth 23.

According to this embodiment of the invention, the additional guide elements 54 are provided. They are, as can be seen in the figure, disposed on the side of the shed 17 positioned opposite the bearing spindle 48 and extend directly up to the position adopted by the outer warp threads when the shed is open. Guide elements 54 are connected by means of a connecting member 63 with the guide elements 30 present on the inner side of the shed 17, Le. in each case one inner element 30 and one outer element 54 are manufactured from a single piece of material, preferably from a single fiat piece of material. Due to the shape provided by the parts 30, 63 and 54, the result is achieved that the dent lamellae 19 are guided also on the outer side of the shed 17. The edge 49 is advantageously so designed that it takes up its position in the immediate vicinity of the rear warp threads of the open shed 17. In this way, a supplementary guide for the shuttles 18 is achieved, by means of which any possibility of the shuttle 18 moving out of the shed is a rearward direction is avoided. Analogously, it is of course advisable to dispose the edges 55 of theguide elements 54 as near as possible to the position obtained with the shed 17 open of the forward warp threads, in order that travel-out of the shuttle 18 in the forward direction (i.e. to the left as viewed in FIGURE 4) may be avoided.

Advantageous materials for the guide elements 30 are hard-rolled aluminum sheet, plastic coated metal sheet or plastic plates reinforced with fabric or glass fibres. The elements 30 are advantageously punched-out in a single working step.

According to a further form of embodiment, only the guide elements 54 are provided. In this case, there are formed in the elements 54 apertures (shown in broken lines at their ends) through which rods 61 and 62 are pushed in the manner already described for the rods 31 to 34. The elements 54 are retained with prior-described mutual spacing from each other by spacing elements in order that the free mobility of the lamellae 19 between the elements 54 may be assured. The assembly thus formed can be joined to the loom frame in readily releasable manner. In the case of this form of embodiment, neither the connecting member 63 nor the elements 30 are provided. With this arrangement, the dent lamellae 19 are held with mutual spacing by means of spacing discs attached on the bearing spindle 48.

Yet a further embodiment of the invention comprises a form of design whereby the greater part of the guide elements is shaped in the manner of the elements 30 shown in FIGURE 2. Individual guide elements, which are arranged with predetermined regular spacing, have however additionally the connecting member 63 shown in FIGURE 4 and the second element 54 carried thereby. With this further embodiment, there are provided over the length of 'a shuttle at least three and on the average approximately five such guide elements of the latter type. These elements, which have the shape corresponding to the parts 30, 63 and 54, are inserted with the predetermined spacing between the guide elements having the shape of part 30 only. In this form of the embodiment, with the guide elements delimiting the shed on both sides, the result is achieved that travel-out of the shuttle in a forward direction out of the shed is avoided without thereby hindering the view of the shuttles traveling through the shed.

When an assembly of guide elements 30 has been formed, after the drawing-through of the

rods

31, 32, 33 and 34 and after the insertion of the spiral spacing elements 35, 42 (FIGURE 2), it is possible that the guide elements 30 may exhibit a degree of looseness. In order to eliminate such looseness, the points about the

spiral spacing member

35, 42 or the entire lower surface of the assembly of guide elements 30 are embedded in a hardenable composition. An advantageous method of carrying this into effect consists in dipping the assembly to a certain degree, for example approximately 2 mm., in a hardenable material, using a tank. As this is done, probably due to capillary effect, there accumulates about the

spirals

35 and 42 somewhat more of the hardenable material than Epoxide resin has been found to be suitable as the hardenable composition.

While the novel features of the invention have been shown and described and are pointed out in the appended claims, it is to be understood that various omissions, substitutions and changes in construction and arrangement of the features shown and described may be made by those skilled in the art without departing from the spirit and scope of the invention.

What is claimed is:

1. An arrangement on a weaving loom for the actuation of reed dent lamellae that extend through a shed formed by warp threads on the loom comprising a bearing spindle extending perpendicular to the warp threads, a plurality of reed dent lamellae arranged along the length of the bearing spindle and individually pivotable about said spindle, each of said reed dent lamellae having a narrow elongated body with an opening at one end through which said spindle extends and being of a suflicient length that its other end extends permanently through the shed of warp threads, means for pivoting said reed dent lamellae about said spindle in such a manner that the lamellae act to drive a plurality of shuttles through the shed and to beat up the weft thread inserted by said shuttles, the forces imparting the pivotal movement to said reed dent lamellae and the forces driving the shuttles through the shed acting on each of said lamellae at an angle to said elongated body, and guide means including laminar guide elements arranged between the reed dent lamellae for preventing lateral bending of said reed dent lamellae, each of said guide elements extending at least from a position adjacent to the means imparting pivotal movement to the reed dent lamellae to a position immediately adjacent the shed formed by said warp threads.

2. The arrangement of claim 1 in which each dent lamella is arranged between two guide elements.

3. The arrangement of claim 1 in which the bearing spindle extends parallel to the direction of the movement of the shuttle and is mounted in the guide elements.

4. The arrangement of claim 1 in which the guide elements are combined together to form an assembly by rods extending transversely through the guide elements, and are retained with predetermined reciprocal spacing by spacer members surrounding said rods.

5. The arrangement of claim 4 in which the spacer members are formed by spiral wires wound around the rods.

6. The arrangement of claim 4 in which at least a portion of the guide elements is coupled with securing members extending transversely thereof and the said securing members are secured by means of a readily releasable con necting means to the frame of the loom.

7. The arrangement of claim 1 in which the guide elements extend from the bearing spindle directly up to the position adopted, when the shed is open, by the inner warp threads, said inner warp threads being those adjacent to the bearing spindle.

8. The arrangement of claim 1 in which the guide elements extend over the ends of the reed dent lamellae positioned opposite the shed relatively to the bearing spindle.

9. The arrangement of claim 1 in which the reed dent lamellae extend over the shed in the direction away from the bearing spindle and the guide elements are disposed on the side of the shed opposite the bearing spindle.

10. The arrangement of claim 9 in which the guide elements extend directly up to the position adopted by the outer warp threads when the shed is open.

11. The arrangement of claim 1 in which at least individual guide elements have portions that extend on both sides of the shed and are joined together by connecting means extending through the shed between the warp threads.

12. The arrangement of claim 11 in which the guide elements having portions extending on both sides of the shed are distributed with regular spacing along the shed, the number of the last mentioned guide elements being so calculated that at least three of them are provided over a distance equal to the length of a shuttle.

13. The arrangement of claim 1 in which said guide elements have apertures for the passing-through of positioning rods and the lamellae have bearing bores for securing said bearing spindle, the apertures on said guide elements being so arranged that when the reed dent lamellae are disposed on the positioning rods, the lamellae take up, with their hearing bores, a position at the position of the bearing spindle.

14. The arrangement of claim 1 material.

15. The arrangement of claim 1 in which the guide elements consist of plastic plates reinforced with fibers.

' 16. The arrangement of claim 1 in which the guide elements are made from a stamped piece of material.

17. The arrangement of claim 1 in which the guide elements are maintained with mutual spacing by a hardenable material applied between them.

18. The arrangement of claim 17 in which the hardenable material is provided, to a predetermined depth, be-

in which the guide tween the guide elements, at least along one lateral face,

determined by identically-positioned edges of the guide elements of an assembly formed by the guide elements.

References Cited UNITED STATES PATENTS OTHER REFERENCES German printed application, Rossmann 1,162,294.

JAMES KEE CHI, Primary Examiner US. Cl. X.R. 139188 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3, 77, 7? Dated November 11, 1969 Inventor(s) Rudolf H. Rossman and Edgar Strauss It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column 1, line 58, the word "dens" should read --dents--. Column 5, line 12, the word "is", first occurrence, should be changed to --in--. Column 7, line 1 before "material" insert --elements are made of hard-rolled aluminum sheet--.

SIGNED AND SEALER WU AM Mum," mull. .m- Alufing Offier flomissioner of Patents ORM PO-IOSO (10-69) USCOMM-DC scan-Pan Q U S GOVERNNENY PRINTING OFFICE IQ. O-SiG-SSI