US3557845A - Guiding device for picked weft threads - Google Patents

Guiding device for picked weft threads Download PDF

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Publication number
US3557845A
US3557845A US839452A US3557845DA US3557845A US 3557845 A US3557845 A US 3557845A US 839452 A US839452 A US 839452A US 3557845D A US3557845D A US 3557845DA US 3557845 A US3557845 A US 3557845A
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Prior art keywords
guide
guide members
aligned
guiding device
openings
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Expired - Lifetime
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US839452A
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English (en)
Inventor
Vladimir Svaty
Jiri Libansky
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Elitex Zavody Textilniho
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Elitex Zavody Textilniho
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    • 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

Definitions

  • the present invention relates to a guiding device for guiding picked wefts, particularly suited for a pneumatic loom in which the weft is picked and inserted into a warp shed by a stream of air.
  • Known pneumatic looms have the disadvantage that the stream of air blown through the warp shed does not have sufficient power to carry an entrained weft thread a very great distance.
  • the friction encountered by the stream of air in the surrounding air causes turbulence so that the stream widens, its flow velocity drops, and the flow of air in the stream becomes irregular.
  • the picked weft thread is frequently caught by a warp yarn, and the weft is not inserted through the whole width of the warp shed.
  • the length of an inserted weft thread cannot be greater than 0.5 meters.
  • Another object of the invention is to increase the length of a weft thread which can be picked by an air stream of predetermined velocity.
  • Another object of the invention is to provide a small and compact guiding device for picked weft threads which is movable between a picking position located in a warp shed, and a beating position located outside of the warp shed so that the reed can beat up the picked and inserted weft thread.
  • Another object of the invention is to provide a guide passage for a picked weft which is substantially closed in peripheral direction so that the weft thread cannot laterally escape.
  • the present invention provides a guiding device for picked weft threads, particularly for weft threads picked by a stream of air produced by a noule in a pneumatic loom.
  • One embodiment of the guiding device comprises a row of first guide members and a row of second guide members alternating with the first guide members, and each guide member being formed with a guide opening and with an outlet gap for the guide opening.
  • the first and second guide members have a picking position in which the guide openings are aligned and form a passage for a picked weft, while the outlet gap of each guide member is crossed by portions of the respective adjacent guide member.
  • the passage through which the weft is picked is substantially closed about the periphery thereof, and an escape of the picked weft thread through the outlet gaps is not possible.
  • a row of first guide members has first guide portions formed with first guide openings aligned along an axis, and having first end portions forming first aligned outlet gaps for the first guide openings, respectively; a row of second guide members alternating with the first guide members and having second guide portions formed with second guide openings along an axis. and having second end portions forming second aligned outlet gaps for the second guide openings; and operating means for moving the first and second guide members between a picking position located between warp threads, and beating positions located outside of the warp shed.
  • the first and second guide portions are aligned in a warp shed along the coinciding axes while the first and second outlet gaps are angularly spaced from each other about the coinciding axes, and the guide portions extend across the outlet gaps of adjacent guide members.
  • the first and second guide openings form in the warp shed a passage for a picked weft, and the passage is substantially closed about the periphery due to the angular staggering of the outlet gaps.
  • the first and second guide portions are located spaced from each other and outside of the warp shed, while the picked weft thread remains in the warp shed after passing through the first aligned outlet gaps, and then through the second aligned outlet gaps when the second outlet gaps cross the warp threads on which the picked weft thread lies.
  • the operating means comprise slay means supporting the second guide members, and linkage means connecting the first guide members with the slay means for moving the first guide members in timed relation with the second guide members between the picking and beating positions.
  • the first and second guide members preferably have arms with confronting recesses for receiving warp threads extend ing between adjacent first and second guide members in the picking position. It is advantageous to provide the arms of first and second adjacent guide members with wedge-shaped cross sections disposed in opposite directions so that sufficient space for a warp thread is left between the arms of adjacent guide members.
  • FIG. 1 is a fragmentary elevation, partially in section, illustrating a pneumatic loom provided with the guiding device of the invention in a position in which a weft is picked;
  • FIG. 2 is an elevation, partially in section, illustrating another operational position of the guiding device after picking of a weft thread and before the beating up of the picked weft thread;
  • FIG. 3 is a fragmentary front elevation, partially in section, and illustrating the apparatus of FIG. 1 as viewed in the direction of the arrow III;
  • FIG. 4 is a fragmentary sectional view taken along line rv-rv in FIG. 1;
  • FIG. 5a is a fragmentary horizontal sectional view illustrating modified guide members in the picking position, and on an enlarged scale
  • FIG. Sb is a fragmentary horizontal sectional view corresponding to FIG. 5a but illustrating a different position of the guide members.
  • a rockable slay has arms 2 mounted for angular movement on a shaft 1, and a batten 7 secured to the upper ends of arms 2 by screws 4.
  • a reed 8 is mounted on batten 7 by means of screws 3a, and a pivot 6 connects at least one arm 2 with a link driven by a cam follower from an eccentric cam on a cam shaft, not shown, so that slay 2, 7 'rocks with the reed 8 between the rear position substantially shown in FIG.
  • the batten 7 has a row of slots 10 into which a series of guide members 9 is inserted and adhesively attached by an epoxy glue so that the guide member 9 fonns a comblike structure.
  • Each guide member 9 has a guide portion 12 forming a guide opening 12a which is connected with an outlet gap 14 formed by the two ends of guide portion 12, the end portion 16 being longer and projecting upward. All guide openings 12a are aligned along an axis, and the outlet gaps 14 are also aligned.
  • the passage formed by the guide 1212 a is located in the warp shed aligned with the noule 30, as best seen in FIG.
  • a row of guide members 11 alternates with guide members 9, as best seen in FIG. 2.
  • Guide members 11 have arms 11a with hubs fixedly secured to a shaft 3 which is mounted for turning movement on the batten 7 and passes through openings 3a in guide members 9.
  • guide portions 13 are provided which form central guide openings 13 a aligned along an axis.
  • An outlet gap connects each guide opening 13a with the outside of guide portion 13.
  • guide portions 13 and 12 of guide members 11 and 9 are aligned, so that the axes of the guide openings 13a and 12a coincide, and the alternating guide openings 12a and 1311 form a guide passage.
  • the outlet gaps 14 and 15 are ang'ularly staggered in the picking position, outlet gaps 14 being substantially vertical, and outlet gaps 15 being substantially horizontal. Consequently, in the picking position of FIG.
  • each guide portion 13 extend across the outlet gaps 14 of adjacent guide members 9
  • parts of guide portions 12 extend across outlet gaps 15 of adjacent guide members 11 so that the guide passage 29 formed by alternating guide openings 12a and 13a is substantially closed, and a stream of air blown out of nozzle 30 in axial direction of the aligned guide openings 12a and 13a, blows a weft thread 32 through the guide passage while being confined in the same since the outlet gaps are substantially closed.
  • a lever arm 17 is secured to shaft 3 and turns with the same and with all guide members 11.
  • a link 19 is connected by pivot 18 with lever 17 and by pivot 20 with the arm 21 of an angular lever which is mounted on a stationary shaft 22 and has another arm 23 connected by a pivot 24 to a link 25 connected by a pivot 26 with the slay 2.
  • the slay 2, 7 In the position shown in FIGS. 1, the slay 2, 7 is near the rear dead center position, and due to the construction of the linkage 17 to 26, the guide portions 12, 13 and the guide openings 12a, Ba are aligned along an axis with the air nozzle 30 to which a weft thread 32 is supplied through a central axial duct, as shown in FIG. 3. Pressure air is supplied through tube 31 to nozzle 30, and the weft thread 32 is blown through the passage formed by guide openings 12a and 13a.
  • outlet gaps 15 and 13 are crossed by parts of the adjacent guide portions, of the respective adjacent guide members, no substantial air losses occur through the outlet gaps, and the full force of the stream of air is effective to carry the entrained weft thread across the loom and through the entire width of the warp shed.
  • the aligned outlet gaps 15 in the guide portions 13 trail in the direction of movement of guide portion 13, the weft thread remains in passage formed by the row of guide openings 12a formed in guide portions 12 of guide members 9, and easily passes through the aligned outlet gaps 15 which together form an outlet channel for the portion of weft thread 32 which was during the picking located also in the guide openings 13a.
  • the aligned guide openings 12a and 13a are substantially peripherally closed by adjacent guide portions to form a passage for the stream of air picking the weft thread
  • the outlet gaps 15 and 14 are no longer closed, so that the outlet gaps are open, and the weft thread can be first moved removed from guide portions 13 and then from guide portions 12, as described above.
  • the slay 2 and '13 are located below the warp shed 28, the .pro-
  • the warp threads of the lower warp 28 extend between the arms 1 1a and 9a of guide members Hand 9, and in order to provide more room for the warp threads, the lateral faces of arms 9a and 11a have recesses 36 and 37 disposed to receive the lower warp threads, as best seen in FIGS. 1 and 3.
  • the arms 9a and 11a are spaced from each other when the guide portions 13 and 14 are aligned, so that different portions of the lower warp threads engage arms 11a and 9a, and clamping of warp threads is reliably prevented.
  • the arms 90 and 110 have wedge-shaped cross sections disposed in opposite directions so that gaps having a substantially uniform width S1 are formed by adjacent arms 9a and 11a through which the warp threads can pass in the picking position shown in FIG. 5a. 1n the position of FIG. Sb,corresponding to the position of FIG. 2, the space between adjacent arms 9a and 11a is increased to the larger distance 52 which is the advantage of the wedge-shaped cross section.
  • Guiding device for picked weft threads comprising, in combination, a row of first guide members, and a row of second guide members alternately arranged relative to said first guide members, each said guide member being fonned with a guide opening and with an outlet gap communicating with said guide opening, said first and second guide members having a picking position in which said guide openings are aligned to form a passage for a picked weft while the outlet gap of each guide member is crossed by portions of the respective adjacent guide members so that said passage is substantially closed along said periphery thereof.
  • Guiding device as claimed in claim 1 comprising a pneumatic nozzle aligned with said guide openings and for blowing a weft thread through said guide passage while said first and second guide members are in said picking position.
  • Guiding device as claimed in claim 1 wherein said passage of aligned guide openings is located in a warp shed; with said guide members alternately passing between adjacent warp threads when said picked weft thread is received therethrough; and comprising means for moving said rows of first and second guide members successively out of said warp shed so that said first and second guide members release the picked weft thread through said outlet gaps into the warp shed.
  • Guiding device for picked weft threads comprising, in combination, a row of first guide members having first guide portions formed with first guide openings aligned along an axis, and having first end portions forming first aligned outlet gaps for said first guide openings, respectively; a row of second guide members alternately arranged relative to said first guide members and having second guide portions formed with second guide openings aligned along an axis, and having second end portions forming second aligned outlet gaps for said second guide openings; and operating means for moving said first and second guide members between a picking position located between warp threads, inwhich picking position said first and second guide portions are aligned in a warp shed along said axes which coincide, while said first and second outlet gaps are angularly spaced from each other about said coinciding axes and said guide portions extend across said outlet gaps of adjacent guide members, respectively, whereby said first and second guide openings form in said warp shed a passage for a picked weft substantially closed about the periphery thereof, and beating positions in which
  • said operating means comprise rockable slay means supporting said second guide members for movement between said picking and beating positions, and linkage means connecting said first guide members with said slay means for moving said first guide members in timed relation with said second guide members between said picking and beating positions so that first said first guide members and then said second guide members assume said beating positions thereof located outside of the warp shed.
  • said linkage means include a shaft turnably mounted on said slay means and fixedly supporting said first guide members, said second guide members having aligned openings through which said shaft passes, and a linkage connecting said shaft with said slay means and including at least one stationary pivot so that said shaft with said first guide members turns relative to said second guide members during movement of said slay means.
  • first and second guide members have arms, respectively, at whose ends said first and second guide portions are located, respectively; and wherein said arms have recesses for receiving warp threads extending between adjacent arms of said first and second guide members in said picking position.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US839452A 1968-07-04 1969-07-07 Guiding device for picked weft threads Expired - Lifetime US3557845A (en)

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CS491368 1968-07-04

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DE (1) DE1932836A1 (de)
FR (1) FR2012314A1 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3796236A (en) * 1971-12-09 1974-03-12 Schlafhorst & Co W Weft thread inserting means
US3926226A (en) * 1973-04-10 1975-12-16 Saurer Ag Adolph Guide member support and device for beating up weft yarn in the shed of a loom
JPS5246174A (en) * 1975-07-17 1977-04-12 Elitex Zavody Textilniho Device for inserting weft in jet loom
DE3010249A1 (de) * 1979-03-17 1980-09-25 Toyoda Automatic Loom Works Vorrichtung zum fuehren eines schussfadens in einem jet-webstuhl
US4438790A (en) * 1980-03-27 1984-03-27 Ruti Machinery Works Ltd. Apparatus for guiding a fluid medium driven weft thread in the shed of a loom and use of the apparatus at a multiple longitudinal traversing shed loom
US4485850A (en) * 1981-03-11 1984-12-04 Tsudakoma Kogyo Kabushiki Kaisha Auxiliary device for weft insertion on an air jet loom
US5358083A (en) * 1993-11-17 1994-10-25 Molton Ku Trunk case
CN102634912A (zh) * 2012-03-30 2012-08-15 青岛天一集团红旗纺织机械有限公司 用于喷气织机的开筘引纬辅助机构

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2437296C2 (de) * 1974-08-02 1982-11-04 Norbert 5000 Köln Brabeck Hohlprofilleiste
JPS5319073U (de) * 1976-07-14 1978-02-18
JPS5418955A (en) * 1977-04-26 1979-02-13 Scheffel Walter Weaving machine with warping apparatus
DE2901311C2 (de) * 1979-01-15 1984-07-19 Walter 8832 Weissenburg Scheffel Webmaschine mit Schußeintrag durch ein strömendes Medium
EP0019647B1 (de) * 1979-06-01 1983-04-27 GebràœDer Sulzer Aktiengesellschaft Zahnelement zur Führung des Schusseintrags-Luftstrahles bei einer Düsenwebmaschine
EP0039741A1 (de) * 1980-05-08 1981-11-18 Walter Scheffel Webmaschine mit Schusseintrag durch ein strömendes Medium
US4357963A (en) * 1980-05-16 1982-11-09 Walter Scheffel Loom with weft picking by a flowing medium

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US741749A (en) * 1902-05-02 1903-10-20 Crompton & Knowles Loom Works Loom for weaving short wefts.
US3203452A (en) * 1962-08-24 1965-08-31 Sdruzeni Podniku Textilniko St Weft confining comb for pneumatic looms
US3399701A (en) * 1964-11-03 1968-09-03 Strake Maschf Nv Reed for a loom

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US741749A (en) * 1902-05-02 1903-10-20 Crompton & Knowles Loom Works Loom for weaving short wefts.
US3203452A (en) * 1962-08-24 1965-08-31 Sdruzeni Podniku Textilniko St Weft confining comb for pneumatic looms
US3399701A (en) * 1964-11-03 1968-09-03 Strake Maschf Nv Reed for a loom

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3796236A (en) * 1971-12-09 1974-03-12 Schlafhorst & Co W Weft thread inserting means
US3926226A (en) * 1973-04-10 1975-12-16 Saurer Ag Adolph Guide member support and device for beating up weft yarn in the shed of a loom
JPS5246174A (en) * 1975-07-17 1977-04-12 Elitex Zavody Textilniho Device for inserting weft in jet loom
JPS5732141B2 (de) * 1975-07-17 1982-07-09
DE3010249A1 (de) * 1979-03-17 1980-09-25 Toyoda Automatic Loom Works Vorrichtung zum fuehren eines schussfadens in einem jet-webstuhl
US4438790A (en) * 1980-03-27 1984-03-27 Ruti Machinery Works Ltd. Apparatus for guiding a fluid medium driven weft thread in the shed of a loom and use of the apparatus at a multiple longitudinal traversing shed loom
US4485850A (en) * 1981-03-11 1984-12-04 Tsudakoma Kogyo Kabushiki Kaisha Auxiliary device for weft insertion on an air jet loom
US5358083A (en) * 1993-11-17 1994-10-25 Molton Ku Trunk case
CN102634912A (zh) * 2012-03-30 2012-08-15 青岛天一集团红旗纺织机械有限公司 用于喷气织机的开筘引纬辅助机构

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Publication number Publication date
DE1932836A1 (de) 1970-01-15
FR2012314A1 (de) 1970-03-20

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