US3638686A

US3638686A - Carriers for filling insertion in a weaving machine

Info

Publication number: US3638686A
Application number: US91988A
Authority: US
Inventors: Ramon Sole; Othmar Bruhwiler
Original assignee: Georg Fischer AG
Current assignee: Georg Fischer AG
Priority date: 1969-11-27
Filing date: 1970-11-23
Publication date: 1972-02-01
Anticipated expiration: 1989-02-01
Also published as: DE2054788A1; DE2054788B2; CS149942B2; CH502461A; JPS491029B1; FR2072516A5

Abstract

The invention relates to a pair of carriers for filling insertion from a filling supply package positioned outside of the warp shed in a weaving machine, said carriers consisting of an inserting carrier and of a withdrawing carrier, both of which are provided with a thread clamping device or thread end holding means.

Description

United States Sole et a1.

' tent 51 Feb.1,1972

[54] CARRIERS FOR FlLLING HNSERTION 1N A WEAVING MACHINE [72] lnventors: Ramon Sole; Othmar Bruhwller, both of Brugg, Switzerland [73] Assignee: Georg Fischer AG., Aargau,Brugg, Switzerland [22] Filed: Nov. 23, 1970 [21] Appl. No.: 91388 [30} Foreign Application Priority Data Nov. 27, 1969 Switzerland ..17767/69 [52] U.S.Cl ..139/127 R, 139/122N [51} Int. Cl. ..D03d 47/18 [58] Field of Search 139/122-127 [56] References Cited UNITED STATES PATENTS 3,390,707 7/1968 Scherillo ..l39/122 FOREIGN PATENT S OR APPLICATIONS 716,906 10/1966 Italy ..139/122 482,852 1/1970 Switzerland ..l39/122 Primary Examiner-Henry S. J audon Attorney-Rodney C. Southworth 5 ABSTRACT The invention relates to a pair of carriers for filling insertion from a filling supply package positioned outside of the warp shed in a weaving machine, said carriers consisting of an inserting carrier and of a withdrawing carrier, both of which are provided with a thread clamping device or thread end holding means.

5 Claims, 13 Drawing Figures PATENIEU FEB H972 3.638.686

sum 1 or 5 Fig. 1

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ATTORNEY PATENTED EB "9 SHEET '6 [IF 5 Fig. 5a

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ATTORNEY PATENTED FEB 1 I972 SHEET SUFS Fig.9

INVENTORS Ramon Sol Othmcr B'ijhwiler ATTORNEY CARRIERS FOR FILLING INSERTION IN A WEAVING MACHINE BACKGROUND OF THE INVENTION For shuttleless looms with single pick insertion two basic insertion systems are known and used, in both of which the filling yarn is inserted into the warp shed by an inserting carrier and a withdrawing carrier entering the warp shed from opposite sides, meeting each other in the middle of the shed for yarn or pick transfer and thereafter returning to their basic position The one system known as loops insertion, is characterized in that a filling thread leading from a cloth selvage to a yarn supply package is caught by an inserting carrier provided with guiding surfaces and is extended or transported in the form of a loop sliding over the guiding surfaces to the middle of the cloth where it is taken over by or transferred to the meeting withdrawing carrier. Simultaneously with the transfer of the loop, the filling coming from the last pick and connected at the cloth selvage is cut at the selvage, whereupon the withdrawing carrier moving outwards of the shed pulls the cut pick to the opposite cloth edge. With the other system known as tip insertion, the filling thread leading from one cloth selvage to a yarn supply package is caught by an inserting carrier provided with a clamping device whereby the filling thread is cut at the cloth selvage no later than when the inserting carrier enters the shed so that the free filling tip is carried ahead into the shed. In the middle of the cloth the filling tip is transferred to and clamped by the withdrawing carrier which entered the shed from the opposite side of the cloth. On the return of the withdrawing carrier the filling is, again with its tip ahead, pulled out over the other half of the cloth.

Each of these systems has its own field of application within which full use can be made of its particular advantages. The loop insertion system due to its simple configuration of carriers (no clamping devices) is particularly suitable for fibrous yarns of fine and medium counts requiring handling by devices which are self cleaning. A disadvantage of the loop insertion system is, however, that course yarns and slub yarns do not run well over the guiding surfaces of the carriers or through their tension means.

On the other hand course and slub yarns can easily be inserted with the tip insertion system where the yarn does not have to run over guiding and tensioning surfaces, but is held fast in the carriers. The disadvantage of this system is its tendency to choking or jamming of the links and/or flexible clamping parts when inserting fibrous yarns which give off considerable lint.

However, both systems ideally complement each other and are together in a position to insert a wide range of filling yarn. To use both systems by way of choice on one and the same loom and with a reasonable changeover time has so far not been possible because of the fact that too many control elements for presenting the thread to the inserting carrier and also the thread cutting devices had to be exchanged and that the inserting carriers for the tip insertion system required a virtually vertical presentation of the filling yarn, which is not possible in the same way with the loop insertion system.

SUMMARY OF THE INVENTION The task of the present invention is to create filling insertion members for tip insertion that can be used in a simple manner instead of the filling insertion members for loop insertion, whereby the control elements for loop insertion such as the filling depressor e.g., as per Swiss Pat. No. 464,106, and with slight modification, the multicolor filling control motion e.g., as per Swiss Pat. No. 465,524, and a filling cutting device e.g., as per copending US Patent application Ser. No. 68,859 filed Sept. 2, 1970 (Inventors: Anton Egloff and Oskar Bernath) can be used unchanged, and wherein only the timing of thread clamping, depressing and cutting within the insertion cycle have to be reset.

This also supposes that the filling thread can be presented to the new inserting carrier in what is close to a horizontal position, similarly as for a loop insertion system. In addition a stationary control bar has to be provided to open the withdrawing carrier. This control bar can be fastened by two screws to the tape guide. The changeover from one system to the other requires only a few changes and adjustments and take a fraction ofthe time for a warp change.

The present invention is further characterized in that the inserting carrier is provided at its head with a warp end separating part which is approximately parallel to the reed, the upper edge of which has the shape of a rising, concave thread guide cam face and extends into an open thread groove which is overlapped by a horn, the tip of which projects out towards the reed, whereby the clamping point for the filling yarn is recessed in relation to the thread groove, and in that the withdrawing carrier is provided at its side opposite the reed with a front wall approximately parallel to the reed and having a shoulder that overlaps the tip of a horn which is provided at a movable clamping part that cooperates with a horizontal clamping bottom surface extending from the front wall towards the reed and to which a thread groove for the filling yarn release is joined toward the tip of the carrier.

The drawings show by way of example one configuration of the invention, wherein:

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view ofa filling control motion on a shuttleless loom showing the carriers shortly after the inserting carrier has caught the filling yarn,

FIG. 2 is a plan view of the same arrangement as in FIG. I, but after the transfer of the filling yarn to the withdrawing carrier,

FIG. 3 is a front view of the inserting carrier,

FIG. 4 is a plan view of the inserting carrier of FIG. 3, FIGS. 50, 5b, 5c and 5d are front views of the inserting carrier of FIGS. 3 and 4, in four successive phases during the taking of the filling.

FIG. 6 is a front view of the withdrawing carrier which is designed to cooperate with the inserting carrier of FIGS. 3 and FIG. 7 is a plan view of the withdrawing carrier of FIG. 6,

FIG. 8 is a plan view illustrating the operation of both carriers at filling transfer,

FIG. 9 is a vertical section across the left hand tape guide showing the opening mechanism for the withdrawing carrier, and

FIG. 10 is a section across the inserting carrier along the line XX in FIG. 4.

DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 is a plan view showing a filling control motion of a shuttleless loom with single pick insertion by means of an inserting carrier and a withdrawing carrier functioning according to the tip insertion system. On a girt l of the weaving machine (not shown in great detail) is mounted a control housing 2 with a camshaft 6 borne in two bearings 3. This cam shaft 6 is driven by means (not shown) synchronously with the movements of the reciprocating filling insertion members 4 and is equipped with a plurality of cams 5.

The control movements of the rotating cams 5 are transferred to pushing rods 9, l0, l1 and 12 provided with cam following rollers 7, said pushing rods being horizontally movable in guides in a bar 13. The pushing rod 9 is provided with teeth 14 that mesh with a pinion 15 on a shaft 118 that is borne in bearings 16 and 17. This pinion shaft 18 operatively supports the filling cutting device which as a whole is identified by numetal 19. The end 20 of the shaft 18 extending towards the cloth allows setting the filling cutting device 19 to the required cloth width. The filling cutting device 19 is arranged on the pinion shaft 18 so that its cutter members 21, 22 can move up and down outside the warp ends 23 of a ground cloth, i.e., adjacent to the cloth selvage 24.

The pushing rods 30, ll act via double levers 26 linked in bearings 27 and provided with rollers upon a filling depressor 28, the purpose of which is to bring the filling yarn 29 from an inclined position into a more level or horizontal position to allow the filling yarn to be taken over by an inserting carrier 36 of the filling insertion member 4. The rollers 25 are pressed against the pushing rods 10 and 11, respectively, by traction springs (not shown).

The pushing rod 12 is connected to a rod 33 movable in guides 31 and provided with a pressor 32, said rod being spring loaded by compression spring 34 against the pushing rod 12. The presser 32 acts upon a filling clamp 35 consisting of two flat springs 37 fixed in two studs 36 and ofa counter or backing stud 38.

Furthermore, there are a lay sword 39, a lay 40 with a read 41 and a raceway 42 as support for the warp ends 23 and the flexible type tape filling insertion member 4 running in the tape guide 43.

The filling thread 45 forming the cloth 44 together with the warp ends 23 have free ends 46 at the selvage 24. The cutting of the filling yarn 29 connected with the last beaten-up pick 47, and passing in a loop around the filling cutting device 19, and being held fast in the thread clamping device 48 of the inserting carrier 3i), takes place when the thread clamping point at the carrier has reached the outermost warp ends 23. The filling yarn 29 now leads from the inserting carrier 30 through a filling positioner 50, the filling clamp 35 and a protector shield with eyelet 51 to a filling supply package 52 and is inserted with the thread tip 53 which was cut off from the last beaten-up pick as the leading end of the pick.

FIG. 2 shows the same arrangement at a later moment of the filling insertion cycle, after the filling tip 53 has been trans ferred from the inserting carrier to the withdrawing carrier. Unlike the otherwise identical FIG. 1, this FIG. 2 shows the withdrawing carrier 54 in which the filling is held fast by a thread clamp 55, so that the pick is also pulled out of the shed with its tip or leading end 53 ahead.

FIG. 3, 4 and 10 show the inserting carrier 30. A carrier body 57 firmly connected to a steel tape 4 is provided with a backwall 59 facing the read with a cover surface 60 and with a thread clamping device 48 mounted at the front, which together form a tunnel shaped hollow space 58 for the en trance of the withdrawing carrier. At the head of the carrier the backwall 59 is formed as a warp separating part 61 with a concave guiding cam 62 and an adjacent open thread groove 63. Shown in FIG. 3, the open thread groove 63 is overlapped by a horn 64 pointing to the warp separating part 61 so that any possible loose warp ends 23 cannot get into the thread groove 63.

A clamping bottom member 65 is also fastened to the carrier body 57 by means of screws 66. Cooperating with the clamping bottom member 65 is the clamping piece 69 situated above the clamping bottom member, said clamping piece being freely guided at one end in the hole 67 of the cover surface 60 and at the other end by a stud 68 in a hole of a small lug 70 fixed to the clamping bottom member 65. Pressed into the clamping bottom member 65 is a stud 71 the upper end of which engaging in a hole of the flat spring 73. Centered in another hole of the flat spring 73 is a ball 75 supported by the clamping piece 69. An adjusting screw 76 threaded into the clamping bottom member 65 and positioned between stud 71 and ball 75 allows one to set the clamping pressure between clamping bottom member 65 and clamping piece 69, whereby the clamping force is transmitted at one point from the flat spring 73 via ball 75, securing an advantageous clamping contact. The clamping piece 69 is provided with a flat intake cam face 78 meeting the clamping bottom member 65 at its top surface. The receding back part 81 of the cover surface 60 gives good access from above to the adjusting screw 76 for resetting purposes, while the screw is still sufficiently covered against contact with loose warp ends.

FIGS. 5a, 5b, 5c and 5d show front views of the inserting carrier in four phases a to (1 during filling takeover or pickup. FIG. 5a shows the inserting carrier 30 running in toward the filling 29 leading from the cloth selvage 44 to a filling positioner 50. The filling 29 is first contacted by the concave guiding cam 62 by which, even if the filling is sagging, it is centered until the yarn tension in the filling 29 is increased by the forward movement of the inserting carrier 30 in direction of the arrow 82, so that the filling is safely guided into the thread in take opening 80, FIG. 4. Here the filling depressor 28 has not yet contacted the filling 29.

Now going on to the next phase in FIG. 5b, the filling depressor 28 has reached its bottom center position. Thereby the filling 29 is pulled down and into the open thread groove 63.

In FIG. 5c the filling depressor 28 is on its withdrawing movement. By the inclination of the thread groove 63 the filling 29 is guided to the bottom of groove end 84.

FIG. 5d shows the entrance of filling 29 into the intake cam 78, FIG. 3, of the clamping piece 69. By the continuing forward movement of the inserting carrier 30 in the direction of arrow 82, the bottom groove end 84 takes a position in relation to the cloth selvage 24 which brings the yarn pan 85 directly in front of the intake cam 78 of the clamping piece. The yarn part 85 will thereafter enter up to the thread clamping point 79. When the tip of the filling is thus held in the clamping device of the inserting carrier 30, the cut takes place near the cloth selvage 24, however, for simplicity of illustration, the cutter is not shown here.

FIG. 6 is a front view and FIG. 7 a plan view of the withdrawing carrier 54. A steel tape 4 is fixed to the carrier body 87 which has in its U-shaped recess 88, open at the top, a clamping piece 90 pivotably mounted on axis 89, consisting of an opener part 91 and of a clamping lever part 92 with a horn 93. At the place of the tip 95 of the horn 93, the front wall 94, facing away from the reed, of the U-shaped section 88 is provided with a shoulder 96 projecting beyond the tip 95 and leading to the same plane formed by the surface of the horizontal clamping bottom 97 which is mounted under the hook 93 on the inside of the wall 94. Adjacent to the clamping bottom 97 there is a cross notch 98 in the front wall 94 matching exactly with a notch 99 at the lower side of the horn 93. Front wall 94 and horn 93 extend towards the carrier tip 100 of the front wall. The tapered intake section 101 at the bottom of the horn 93 together with the clamping bottom 97 form the thread clamping device of the withdrawing carrier 54. By depressing the opener part 91 against a built-in spring 102, the intake section 101 can be lifted off the clamping bottom, whereby the clamping effect is cancelled and a clamped thread runs at once into the

notches

98, 99 whereby it is released.

A spring plate 107 having a nose 108 bent toward the carrier tip 100 is fastened to the front wall 94 by means ofa plate and screws 106. The nose 108 forces the thread end 53 of a filling yarn 29 clamped between clamping bottom 97 and horn 93 to take a hair pin shape, which causes an increased clamping effect and, particularly when using stiff yarn, makes it possible to clamp it securely.

FIG. 8 illustrates the filling transfer from the inserting to the withdrawing carrier. The filling 29 presented by the inserting carrier 30 in an angular configuration 110 formed over the groove end 84 and the thread clamping point 79 is inserted into the withdrawing carrier between horn 93 and shoulder 96. On pulling out the withdrawing carrier 54 from the inserting carrier 30, the filling yarn 29 runs under the horn 93, FIG. 7, where it is clamped and pulled out of the thread clamping point 79 of the inserting carrier 30. Of particular importance is the angle 110 of the presented filling 29 as only this position and condition guarantees that the tip 95 is covered (seen in the direction of the warp ends) by the front wall 94 or the shoulder 96, and that the filling is safely inserted without harm to the warp.

FIG. 9 shows a section across the left hand tape guide with the opening mechanism for the withdrawing carrier. When the withdrawing carrier 54 leaves the cloth 44, the clamping effect of the taking carrier 54 or the clamping piece 90 upon the filling 29 is to be cancelled to allow the filing tip to be released by the withdrawing carrier. For this purpose an angle shaped bracket 112, onto which a stationary opener cam 114 is clamped by means of screw 113, is mounted on the left hand tape guide 43 by means of screws [11. Toward the end position of the withdrawing carrier, the opener cam 114 presses against the opener part 91 of the withdrawing carrier 54 to release the filling.

The pair of carriers as heretofore described allows a filling yarn insertion by tip insertion, by simple change of carriers and without doing more than making adjustments of the filling control devices in a loom otherwise equipped and operable for the loop insertion system. The possibility of damaging loose warp ends is excluded with both carriers in that the horn 64 of the insertion carrier and the horn 93 of the withdrawing carrier are overlapped. This overlapping is in turn possible due to the oblique position of the filling in the carrier.

This disclosure of a preferred embodiment of the invention is to be interpreted as illustrative of one form the invention may take and modifications will readily occur to those skilled in the art. The invention is not to be restricted except by the scope of the appended claims wherein the novel features desired to be protected by Letters Patent are set forth We claim:

I. A pair of carriers for the filling insertion from a supply package positioned outside of the warp shed on a weaving machine, said pair of carriers consisting of an inserting carrier and a withdrawing carrier each being provided with a thread clamping means, characterized in that, the inserting carrier (30) is provided at its head with a warp end separating part (61) extending virtually parallel to the reed (41) of the weaving machine, the upper edge (62) of the warp separating part having the shape of a rising, concave thread guide cam face which terminates in an open thread groove (63) extending downwardly and which is overlapped by a horn (64) running out toward the reed, clamping means (48) and (69) having a clamping point (79) for the filling yarn (29) which is setback and substantially on a level with the terminal portion of thread groove (63), and further in that the withdrawing carrier (54) on its side facing away from the reed is provided with a front wall (94) disposed virtually parallel to the reed, a clamping piece cooperating with a horizontal clamping bottom member (97), said member (97) extending from the front wall (94) toward the reed, a notch (98) for releasing the filling positioned adjacent to the carrier tip (100) and the clamping bottom member (97), said clamping piece (90) having adjacent the carrier tip a horn (93) and the front wall having a shoulder (96) overlapping the horn (93).

2. A pair of carriers as defined in claim 1, wherein a clamping piece (69) in the inserting carrier (30) extending in the direction of filling insertion is loosely guided at both ends.

3. A pair of carriers as defined in claim 2, wherein, the clamping piece (69) is depressed by a flat spring (73) via a ball (75) centered in a hole.

4. A pair of carriers as defined in claim I, wherein, the front wall (94) of the withdrawing carrier is provided with a spring plate (107) with a longitudinally disposed, angularly shaped nose (108).

5. A pair of carriers as defined in claim 4, wherein, the horn (93) together with the clamping bottom (97) form a U-shaped profile.

Claims

1. A pair of carriers for the filling insertion from a supply package positioned outside of the warp shed on a weaving machine, said pair of carriers consisting of an inserting carrier and a withdrawing carrier each being provided with a thread clamping means, characterized in that, the inserting carrier (30) is provided at its head with a warp end separating part (61) extending virtually parallel to the reed (41) of the weaving machine, the upper edge (62) of the warp separating part having the shape of a rising, concave thread guide cam face which terminates in an open thread groove (63) extending downwardly and which is overlapped by a horn (64) running out toward the reed, clamping means (48) and (69) having a clamping point (79) for the filling yarn (29) which is set back and substantially on a level with the terminal portion of thread groove (63), and further in that the withdrawing carrier (54) on its side facing away from the reed is provided with a front wall (94) disposed virtually parallel to the reed, a clamping piece (90) cooperating with a horizontal clamping bottom member (97), said member (97) extending from the front wall (94) toward the reed, a notch (98) for releasing the filling positioned adjacent to the carrier tip (100) and the clamping bottom Member (97), said clamping piece (90) having adjacent the carrier tip a horn (93) and the front wall having a shoulder (96) overlapping the horn (93).

4. A pair of carriers as defined in claim 1, wherein, the front wall (94) of the withdrawing carrier is provided with a spring plate (107) with a longitudinally disposed, angularly shaped nose (108).