EP0360742A1 - Appareil de formation de lisière pour un métier à tisser - Google Patents
Appareil de formation de lisière pour un métier à tisser Download PDFInfo
- Publication number
- EP0360742A1 EP0360742A1 EP89810662A EP89810662A EP0360742A1 EP 0360742 A1 EP0360742 A1 EP 0360742A1 EP 89810662 A EP89810662 A EP 89810662A EP 89810662 A EP89810662 A EP 89810662A EP 0360742 A1 EP0360742 A1 EP 0360742A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- laying needle
- fabric
- laying
- plane
- needle shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
- D03D47/40—Forming selvedges
- D03D47/48—Forming selvedges by inserting cut end of weft in next shed, e.g. by tucking, by blowing
Definitions
- the invention relates to a last laying device for weaving machines, with a covering device, covered by the fabric formed, at a distance from a tissue plane determined by a section of the fabric web, for a laying needle arranged on a laying needle shaft, which has an end section pivotable in a rotation plane into and out of the shed for inserting an end projecting from the shed in each case of a weft thread attached to the fabric in a stop plane of a reed in a subsequent shed.
- the laying needle shaft carrying the laying needle is slightly inclined to the tissue and is driven by the reed via a crank mechanism.
- the laying needle is formed by a tube which is connected to a suction air system in order to suck in and hold the weft end. Due to the slightly inclined arrangement of the laying needle shaft, the laying needle moves in a plane slightly inclined to the fabric and sticks into the shed from below in order to grasp the weft thread end protruding from the shed and to pull it into the shed during the return movement. Since the laying needles and their drive are below the fabric, they are the Observation practically withdrawn by the operating personnel. They are also difficult to access, making it particularly difficult to set the laying needle precisely with regard to the shed.
- the invention has for its object to provide a strip laying device of the type defined, which is directly observable by the operating personnel and easily accessible for adjustment.
- FIG. 1 shows warp threads 1 located in the high shed and warp threads 2 located in the shed in an edge region 3 of the warp of a weaving machine while a shed 5 is open.
- a weft thread 42 is inserted into the shed 5, which is beaten by a reed 9 onto the fabric 6 formed from the warp threads 1, 2 and the weft threads 42.
- the fabric 6 is guided in the two edge areas of the weaving machine via a spreader 7, which is located below a spreader cover 8.
- the fabric 6 with a nominal width B runs from the spreader covers 8, of which only one is shown in FIG. 1, each with a lateral recess E and is - with a correspondingly reduced width B1 - in a fabric plane 6 'against one not shown breast tree and guided by this against the goods tree of the weaving machine.
- a last laying device 10 which contains a laying needle shaft 12 with a laying needle 13, a drive device 14 for the laying needle shaft 12 and a holding device 15 for grasping and holding the end of the last inserted weft thread 42 protruding from the shed 5.
- the laying needle 13 consists of an approximately hook-shaped band, which is provided at its free end 54 with a thread inlet opening, according to the illustration an eyelet 18, and is fastened on the laying needle shaft 12 by means of a holder 19.
- the laying needle shaft 12 is rotatably supported at one end 20 about its longitudinal axis in a radial-axial bearing 21 of the drive device 14, which lies below the tissue plane 6 '.
- the laying needle shaft 12 runs from the drive device 14 - in addition to the lateral fabric edge 22 and essentially parallel to an imaginary vertical plane V (FIG. 3) determined by this fabric edge 22 - at an acute angle ⁇ to the tissue plane 6 'beyond this in the direction against the shed 5.
- the drive device 14 (FIGS. 2, 3) contains a cam disk 23 which is fastened on a control shaft 24 which forms a right angle ⁇ with the laying needle shaft 12 and which is continuously driven by the main shaft of the weaving machine.
- the cam plate 23 is partially surrounded by a bow-shaped guide part 28 attached to the end 20 of the laying needle shaft 12 and has a control groove 25 into which two drivers 26 and 27 fastened on the guide part 28 engage, which can be designed as sliding blocks.
- the lay needle shaft 12 rotates back and forth about its longitudinal axis with each revolution of the main shaft, whereby the lay needle 13 swivels accordingly and its end section 13c in a plane of rotation 30 between the upper warp threads 1 and into the shed 5 or is led out of this.
- the laying needle 13 has a straight section 13a, which merges via a curved section 13b into the essentially circular-arc-shaped end section 13c, which is designed with a radius of curvature R related to the axis of the laying needle shaft 13 (FIG. 6).
- the end section 13c is formed by a band section which is bent in the shape of a cone and which, according to FIG.
- the laying needle 13 corresponds to the lateral surface of an imaginary cone 29, the base of which lies in the plane of rotation 30 and the tip 29b of which lies on the longitudinal axis of the laying needle shaft 12, with respect to the shed 5 the deepest surface line 29a of this cone 29 essentially coincides with a central plane 5a dividing the height of the shed 5 and with a main axis y of the cross section of the end section 31c pivoted into the shed 5 (FIG. 2a). It goes without saying that the laying needle 13 can also be adjusted such that the deepest part of the end section 13c runs above or below the central plane 5a.
- the plane of rotation 30 of the laying needle 13 forms an acute angle ⁇ with a stop plane 31 of the reed 9 running through the stop line 32 and intersects this stop plane 31 according to a straight line 33 which, according to FIG. 2, is perpendicular to the drawing plane, parallel to the stop line 32 of the reed 9, runs.
- a pneumatic rotary control slide 35 is attached to the drive device 14 and is continuously driven by the insertion shaft 24.
- the rotary control slide 35 controls the connection between, on the one hand, a compressed air source (not shown) and, on the other hand, a blowing nozzle 36 and a threading nozzle 37 (FIG. 5) of the holding device 15, such that one nozzle is switched off and the other is switched on.
- Both nozzles 36 and 37 are fastened on a carrier 38 which is moved back and forth in the machine rhythm according to arrow 40 (FIG. 1).
- FIG. 6 shows the weft thread 42 that was last entered and struck by the reed 9 in the stop line 32. Its end 42a, which projects out of the shed 5 (drawn in dashed lines), is held in place by edge warp threads 43. Instead of the edge warp threads 43, a known thread clamp (not shown) can also be provided.
- the carrier 38 with the blowing nozzle 36 and the threading nozzle 37 is moved in a manner not shown from a starting position remote from the reed 9 in the direction of the reed 9 until both nozzles 36 and 37 move on both sides of the end 42a of the weft thread 42 are located.
- the blowing nozzle 36 is switched on by the control slide 35 and the weft thread 42 is cut off with scissors 46.
- the blowing nozzle 36 blows the now free weft end 42b into the switched-off one Threading nozzle 37, whereby the weft 42 is kept taut.
- the laying needle 13 is pivoted into the shed 5 by the laying needle shaft 12, viewed counterclockwise from the drive device 14, through the warp threads 1 located in the high shed, until it swings the eyelet 18 is located between the two nozzles 36 and 37.
- the blowing nozzle 36 is then switched off and the threading nozzle 37 is switched on, which blows the weft end 42b through the eyelet 18 into the blowing nozzle 36; this now holds the weft 42 under tension.
- the weft end 42b is pulled into the shed 5.
- the carrier 38 is returned to its starting position and the threading nozzle 37 is switched off.
- the weft 45 which has meanwhile been registered, is then struck by the reed 9, together with the drawn-in weft end 42b, against the fabric 6 beginning at the stop line 32.
- the weft 45 and the weft end 42b are bound into the fabric 6, the weft end 42b forming part of the fabric bar.
- the laying needle 13 can be adjusted in three directions on the laying needle shaft 12. 2, 3 and 6, the laying needle 13 provided with an elongated hole 52 is fixed by a screw 51 to the holder 19 in the longitudinal direction of the straight section 31a, whereby the height of the end section 13c of the laying needle 13 with respect to the shed 5 can be set.
- the bracket 19 designed as a clamp is fastened by means of a screw 55 on the laying needle shaft 12 so as to be adjustable in the axial direction and in the circumferential direction, as a result of which the distance of the end section 13c from the stop line 32 (FIG. 2) or Starting position of the laying needle tip 54 for the pivoting movement into the shed 5 can be adjusted.
- a holder 49 is fastened on the laying needle shaft 12, on which a groove 53, which is essentially parallel to the deepest sheath line 29a with respect to the shed 5, is designed as a guide track for the laying needle 13.
- the laying needle 13 is provided with a holding arm 13d which is angled with respect to its straight section 13a and which is displaceably mounted in the groove 53 and can be fixed by the screw 51 arranged in the slot 52.
- the distance of the end section 13c of the laying needle 13 from the stop line 32 can be adjusted after loosening a single screw 51, the end section 13c essentially maintaining its height position with respect to the stop line 32 determined by the setting of the holder 49.
- the band-shaped laying needle 13 instead of the band-shaped laying needle 13 described above, it is also possible to use an appropriately designed rod-shaped laying needle 90 (FIG. 2b) or a tubular laying needle 16 (FIG. 2c), the thread inlet opening of which lies in the region of the conical surface of the cone 29 and the end section 13c thereof is adjustable in the manner described with respect to the central plane 5a of the shed 5.
- the tubular laying needle 16 can be connected in a known manner to a suction air system, not shown, and can be provided with a suction opening as the thread inlet opening.
- the function of the strip laying device 10 means that the articulation point of the laying needle 13 on the laying needle shaft 13 lies by an amount equal to X within the nominal width B of the fabric 6.
- This is the embodiment according to FIGS. 1 3 to 3 are possible for a large number of fabrics in which the tissue recess E is so large that the laying needle shaft 12, which is straight in this embodiment, can be guided past the fabric edge 22 without touching it.
- a laying needle shaft 66 with an offset 67 can be provided according to FIG. 7, which is guided around the tissue edge 22.
- the offset 67 is formed in the region of the fabric edge 22 between two straight sections 66a and 66b of the laying needle shaft 66.
- the hollow side 68 of the offset 67 faces the fabric edge 22 and is so deep that when the laying needle shaft 66 is rotated back and forth, it does not touch the fabric edge 22.
- the laying needle shaft 66 can be supported at one end 59 in a radial-axial bearing 60 of a drive device 57 and connected via an annular guide part 65 encompassing the cam plate 23 to a shaft journal 61 which is located in the housing 62 of the drive device 57 is stored.
- rollers 63 and 64 are mounted, which engage as a driver in the control groove 25 of the cam 23.
- the exemplary embodiment according to FIG. 9 shows a separating strip laying device with a common drive device 72 for two strip laying devices 79 and 83 arranged in mirror image to one another.
- the drive device 72 contains a cam disk 74 with a control groove 75, attached to a control shaft 73 of the two drivers 76 are guided.
- the drivers 76 are mounted on a guide part 77, which with the laying needle shaft 78 of the one groin laying device 79 is connected.
- the laying needle shaft 78 is provided with a toothed segment 80 which meshes with a toothed segment 81.
- the toothed segment 81 is attached to the laying needle shaft 82 of the other last laying device 83.
- the laying needle shafts 78 and 82 are each pivoted in the opposite direction.
- the laying needle shafts 78 and 82 are each provided with an offset 84 and 85, respectively, which leads around the fabric edge 86 and 87 of a fabric web 88 and 89, respectively.
- laying needles 90 and 91 are fastened to the holders 19 of the laying needle shafts 78 and 82, the ends 54 of which can be inserted into the shed, as shown, can be hook-shaped or can be provided with an eyelet 18.
- FIG. 10 shows an air jet weaving machine which contains a weft insertion nozzle 101, a catching nozzle 102 and two last laying devices 110 and 111, the control shaft 24 of which is mounted in side parts 105 and 106 of the weaving machine.
- the strip laying devices 110 and 111 each contain a laying needle shaft 166 which is guided around the fabric edge 22 with a bow-shaped offset 167 and which carries a laying needle 113.
- the laying needle shafts 166, the longitudinal axes of which, as in the examples described above, are each inclined at an acute angle ⁇ (FIG.
- 11 and 12 of this weaving machine contains two bar laying devices 110a and 111a which are arranged in mirror image with respect to one another, each with laying needle shafts 166 arranged inclined to the fabric plane 6 'and to the relevant vertical plane V.
- the weft thread 42 entered into the shed 5 is held by thread clamps 104 arranged in the edge regions 3 and between the separating strip laying devices 110a and 111a and severed by the scissors 46.
- the rotation planes 30 of the laying needles 113 - in contrast to the embodiments according to FIGS. 1 and 7 - do not run parallel to the stop line 32, but rather cut them outside the shed 5 in one, as can be seen in particular from FIG. 12
- Intersection point which in the illustrated embodiment essentially corresponds to the position of the thread inlet opening formed at the end 54 of the correspondingly set laying needle 113, which it assumes in the thread transfer position of the laying needle 113 shown in full lines.
- the ends of the sections of the weft thread 42 held by the thread clamps 104 can be grasped essentially by the stop line 32 in the illustrated embodiment - hook-shaped in the illustrated embodiment - so that further guide means are not required for the weft thread end to be gripped.
- the ends of the weft thread 42 are inserted into the following shed 5 by the laying needles 113 which are each moved against their dash-dotted position.
- the strip laying device according to the invention is not limited to use on air jet weaving machines. Corresponding devices can also be used on other types of weaving machines, e.g. on rapier weaving machines or projectile weaving machines. An embodiment is also possible in which the drive device of the strip laying device is covered by a substantially vertically extending fabric section.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH3550/88 | 1988-09-23 | ||
CH355088 | 1988-09-23 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0360742A1 true EP0360742A1 (fr) | 1990-03-28 |
EP0360742B1 EP0360742B1 (fr) | 1992-02-05 |
Family
ID=4258408
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19890810662 Expired - Lifetime EP0360742B1 (fr) | 1988-09-23 | 1989-09-05 | Appareil de formation de lisière pour un métier à tisser |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0360742B1 (fr) |
DE (1) | DE58900815D1 (fr) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE63002C (de) * | J. H. CLIBRAN, Altrincham, County of Chester, und G. BROWNING, Lower Broughton, Salford, County of Lancaster, England | Vorrichtung zur Bildung innerer Leisten beim gleichzeitigen Weben mehrerer Gewebe mit einem Schützen | ||
US2906296A (en) * | 1956-07-19 | 1959-09-29 | Ancet Victor Marie Joseph | Shuttleless weaving looms |
US3443602A (en) * | 1966-04-15 | 1969-05-13 | Ruti Machinery Work Ltd | Device and method for producing a selvedge |
DE2036401A1 (de) * | 1969-07-22 | 1971-04-29 | Wsesojusnyj nautschno lssledowatels kij Institut ljochkowo i textilnowo ma schinostojenija SSSR, Moskau | Leistenbildende Einrichtung der Web maschine |
FR2249984A1 (fr) * | 1973-11-06 | 1975-05-30 | Nuovo Pignone Spa | |
AT378790B (de) * | 1983-06-14 | 1985-09-25 | Saurer Ag Adolph | Webmaschine, insbesondere frottierwebmaschine |
-
1989
- 1989-09-05 EP EP19890810662 patent/EP0360742B1/fr not_active Expired - Lifetime
- 1989-09-05 DE DE8989810662T patent/DE58900815D1/de not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE63002C (de) * | J. H. CLIBRAN, Altrincham, County of Chester, und G. BROWNING, Lower Broughton, Salford, County of Lancaster, England | Vorrichtung zur Bildung innerer Leisten beim gleichzeitigen Weben mehrerer Gewebe mit einem Schützen | ||
US2906296A (en) * | 1956-07-19 | 1959-09-29 | Ancet Victor Marie Joseph | Shuttleless weaving looms |
US3443602A (en) * | 1966-04-15 | 1969-05-13 | Ruti Machinery Work Ltd | Device and method for producing a selvedge |
DE2036401A1 (de) * | 1969-07-22 | 1971-04-29 | Wsesojusnyj nautschno lssledowatels kij Institut ljochkowo i textilnowo ma schinostojenija SSSR, Moskau | Leistenbildende Einrichtung der Web maschine |
FR2249984A1 (fr) * | 1973-11-06 | 1975-05-30 | Nuovo Pignone Spa | |
AT378790B (de) * | 1983-06-14 | 1985-09-25 | Saurer Ag Adolph | Webmaschine, insbesondere frottierwebmaschine |
Also Published As
Publication number | Publication date |
---|---|
DE58900815D1 (de) | 1992-03-19 |
EP0360742B1 (fr) | 1992-02-05 |
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