EP0363016A2 - Handwebstuhl - Google Patents

Handwebstuhl Download PDF

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Publication number
EP0363016A2
EP0363016A2 EP89309042A EP89309042A EP0363016A2 EP 0363016 A2 EP0363016 A2 EP 0363016A2 EP 89309042 A EP89309042 A EP 89309042A EP 89309042 A EP89309042 A EP 89309042A EP 0363016 A2 EP0363016 A2 EP 0363016A2
Authority
EP
European Patent Office
Prior art keywords
rapier
reed
weft yarn
shaft
weaving loom
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
Application number
EP89309042A
Other languages
English (en)
French (fr)
Other versions
EP0363016A3 (de
EP0363016B1 (de
Inventor
John Dalton Griffith
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Griffith Textile Machines Ltd
Original Assignee
Griffith Textile Machines Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Griffith Textile Machines Ltd filed Critical Griffith Textile Machines Ltd
Publication of EP0363016A2 publication Critical patent/EP0363016A2/de
Publication of EP0363016A3 publication Critical patent/EP0363016A3/de
Application granted granted Critical
Publication of EP0363016B1 publication Critical patent/EP0363016B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D29/00—Hand looms
    • 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
    • D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick

Definitions

  • the present invention relates to weaving looms.
  • the invention relates to a weaving loom which is compact, light in weight and which is capable of being programmed to produce a variety of patterns by suitable choice of weft yarn selection and/or warp shed sequences.
  • a weaving loom comprising a reed, a flexible rapier capable of reciprocating movement through a warp shed between a first position at one side of the warp shed and a second position at the opposite side of the warp shed, said rapier having a rapier head adapted to grip a weft yarn when the rapier is at the first position, to draw the weft yarn through the warp shed and to release the weft yarn when the rapier is at the second position, wherein the reed is adapted to define a tunnel with the warp shed such that said rapier can be guided entirely by the tunnel as the rapier moves between said first and second positions.
  • a weaving loom including a reed mounted on an oscillatable reed shaft, and a rapier for drawing weft yarn through a warp shed, the rapier having a rapier head mounted on the end of an elongate drive member which is capable of reciprocating the head through the warp shed, drive means for oscillating the reed shaft such that during said insertion and retraction strokes the reed is spaced from the fell to enable unhindered travel of the rapier head and such that the reed is advanced to urge the rapier toward the fell when the rapier is at its fuly inserted position such that the rapier head is positively located for co-operation with weft yarn guide means for collection of weft yarn.
  • a weaving loom according to the invention has the advantage that it enables the rapier to move through the warp unrestrained by any guide member projecting through the warp.
  • a rapier loom with a single rapier does not have to be positioned acurately in the warp shed; it merely has to pass through the shed. Consequently the provision of guides which project into the warp shed is not required.
  • the weaving loom is a single rapier weaving loom.
  • the weaving loom is particularly suited for being manually driven and able to weave fabrics up to about one metre in width.
  • the loom 10 includes a frame having a pair of end walls 14, 16 spaced apart and secured to one another by cross-members 18, 19 located at the front of the loom and cross-members 20, 22 located toward the rear of the loom.
  • the end walls 14, 16 are preferably made from a metal sheet.
  • the loom 10 includes a main drive shaft 25 which is rotatably mounted in the end walls 14, 16.
  • the drive shaft 25 extends beyond end wall 14 and has a sprocket 25 a mounted thereon.
  • the Sprocket 25 a drives a plurality of cams 26 via a chain 27.
  • the cams 26 operate levers 26 a for raising and lowering the heald frames 30 in a conventional manner via cables 30 a .
  • the opposite end of the main drive shaft 25 projects beyond the end wall 16 and has a flywheel 28 mounted thereon (see Figure 2.)
  • a reed shaft 40 is rotatably mounted at opposite ends in end walls 14, 16.
  • the reed shaft 40 projects beyond end wall 14 and has a crank arm 46 mounted thereon.
  • the crank arm 46 has a pair of pawls 47, 48 extending therefrom, pawl 47 being arranged to drive a weft yarn selection mechanism 50 and pawl 48 being arranged to index a toothed disc 53.
  • the loom includes a fabric tension take down roller 52 which has a toothed pulley 52 a fixed thereto.
  • a toothed belt 54 is trailed about the pulley of the toothed disc 53 and pulley 52 a so that indexing of disc 53 causes an indexing movement of the take down roller 52.
  • Woven fabric W extends from the fabric tension take down roller 52 over a guide shaft 58 to be wrapped onto a take-off roller 59.
  • the roller 59 is located at either end in a cradle 59 a formed on the side of respective end walls 14, 16 and is supported at each end by a belt 60 which is trained about roller 52.
  • the opposite end of the reed shaft 40 projects beyond each wall 16 and has bolted thereto a support bar 60 which extends longitudinally from the shaft 40.
  • the support bar 60 has an arm 61 projecting laterally therefrom and is connected via a push rod 62 to a lever 63.
  • the lever 63 extends from a shaft 64 which is rotatably mounted in a frame 65 secured to end wall 16.
  • a bell crank 67 is secured to the shaft 64 and one arm 67 a of the bell crank is connected via a push rod 69 to the flywheel 28.
  • Such oscillation of shaft 64 causes the reed shaft 40 to oscillate as determined by the lever 63 and push rod 62.
  • Lever 63 and push rod 62 can be set so that the reed moves rapidly from the front to the rear, and then moves forward and back a small amount from the rear before returning to the front.
  • Figure 5 shows how this is done.
  • the pivot 80 at the end of lever 63 moves from a position 80, past 80 a to 80 b .
  • This causes the arm 61 to move from position 61 (reed at front) to 61 a (reed at rear) and then to 61 b (reed moved slightly forward again) before returning via the same route.
  • rapier drive mechanism 70 which drives a rapier 72 ( Figure 3) across the warp sheet.
  • the rapier 72 is connected to the end of a flexible drive strip 73, formed for instance from a suitable plastics material, which includes a series of regularly spaced apertures 74.
  • the drive strip 73 is trained about a toothed drive wheel 76 which has regularly spaced projections 78 formed on its periphery for engagement in the regularly spaced apertures 74 of the drive strip.
  • a toothed drive belt 80 is trained about a drive pulley 82 attached to the drive wheel 76 and an idler pulley 83 rotatably mounted on the support bar 60.
  • a clamp head 86 is secured to the lower run of the drive belt 80 and is connected via a push rod 88 to the other arm 67 b of the bell crank 67.
  • the rapier drive mechanism 70 is driven simultaneously with oscillation of the reed shaft 40. Since the rapier drive strip 73 is driven via a toothed wheel 76 which is itself driven by a toothed drive belt 80 the movement of the rapier 72 is synchronised with movement of the reed shaft 40.
  • the reed 90 is attached to a reed support plate 91 which extends along the reed shaft 40.
  • a guide channel 93 is secured at one end to the reed support plate 91 and is attached at its other end to a support plate 94 at a location adjacent to the toothed drive wheel 76.
  • the guide channel 93 provides support and guidance for the drive strip 73 between the drive wheel 76 and its entry into the shed.
  • a support sleeve 96 is secured to the support plate 94 and to a drive strip support plate 97 which is secured to the reed shaft 40.
  • the support plate 97 includes a flange 98 on which is mounted a guide channel 99 for guiding movement of the drive strip 73.
  • the movement of the reed shaft 40 is arranged so as to provide as much clearance as possible during insertion and retraction of the rapier 72. Accordingly for the majority of the duration of movement of the rapier 72 the reed 90 is located at a rearward position.
  • the reed 90 is advanced to an intermediate forward position whereat it urges the rapier drive strip 73 against the fell.
  • the weft yarn 100 from the previous pick extends from the weave through a weft yarn guide eye 101.
  • a combined guide and knife device 103 is provided which is movable between a lower position and a raised position.
  • the guide and knife device 103 includes an angled support plate 106 having a substantially vertical arm 106 a to which a knife blade 107 is attached.
  • the plate 106 has a substantially horizontal arm 106 b which is hingedly attached to part of the loom from LF.
  • the support plate 106 has an upper edge 108 which engages the weft yarn 100 as it is moved to its upper position.
  • Such movement causes the weft yarn 100 to wrap about the underside of the rapier 72 so that when the rapier 72 begins to retract the weft yarn 100 is trapped between the spring wire 110 and the body of the rapier 72.
  • Raising and lowering of the support plate 106 is effected by a push rod 150 which is operated upon by a cam (not shown) mounted on the main drive shaft.
  • the rapier 72 begins to retract further the weft yarn 100 between the rapier and the weave is pulled taught across the knife blade 107 and is cut thereby. In addition as the rapier 72 begins to retract the reed 90 is also retracted toward its rearward position.
  • the reed 90 When the rapier 72 is near to emergence from the rapier insertion side of the weave, the reed 90 beings to advance. As the rapier 72 emerges the upper portion of the spring wire 110 engages a cam block 120 mounted on the reed 90 which causes the lower portion of the spring wire to move away from the body of the rapier and thereby release the weft yarn. As the rapier 72 continues to retract the reed 90 advances to beat-up.
  • a pair of cutters 130 are provided for trimming the edges of the weave.
  • the cutters 130 are mounted on a fabric guide bar 132 and include a static blade 133 and a movable blade 134 which is biased to an open position and closed by a roller 135 being engaged by the reed 90 when it is moved to its beat-up position.
  • the weft yarn selection mechanism 50 preferably comprises a series of laterally spaced rods 200 inter-­connected to form a continuous belt.
  • the belt is supported on a roller 202.
  • the pawl 47 is arranged to successively engage each rod 200 so that during each weaving cycle the belt is advanced by one rod spacing.
  • Each rod 200 carries a cam wheel 205 which, dependent upon its axial position along its associated rod engages with a weft yarn guide arm 210 (only one of which is shown for clarity).
  • a guide arm 210 When a guide arm 210 is engaged by a cam wheel 205 it is raised to an upper feed position whereat it presents weft yarn to the rapier 70.
  • each guide arm 210 is located at a lower stowed position whereat weft yarn guided thereby is not presented to the rapier 70.
  • the main drive shaft 25 is rotatably driven in the embodiment illustrated by means of a manually operated drive means 180 in the form of a continuous chain 181 entrained about a sprocket wheel 182 mounted on the drive shaft 25 and a drive sprocket wheel 183 rotatably mounted on a frame 185.
  • the drive sprocket wheel 183 is rotated by means of a pedal crank assembly 175.
  • the frame 185 preferably extends upwardly to support a seat (not shown) for an operative.
  • a motorised drive means may be incorporated for rotating the main drive shaft 25.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP19890309042 1988-09-07 1989-09-06 Handwebstuhl Expired - Lifetime EP0363016B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB888820952A GB8820952D0 (en) 1988-09-07 1988-09-07 Weaving loom
GB8820952 1988-09-07

Publications (3)

Publication Number Publication Date
EP0363016A2 true EP0363016A2 (de) 1990-04-11
EP0363016A3 EP0363016A3 (de) 1991-08-14
EP0363016B1 EP0363016B1 (de) 1995-05-17

Family

ID=10643176

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890309042 Expired - Lifetime EP0363016B1 (de) 1988-09-07 1989-09-06 Handwebstuhl

Country Status (4)

Country Link
EP (1) EP0363016B1 (de)
DE (1) DE68922683D1 (de)
GB (1) GB8820952D0 (de)
IN (1) IN176606B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114875556A (zh) * 2022-06-16 2022-08-09 安徽恒益纺织科技有限公司 一种复合材料纺织布制造设备

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2465744A (en) * 2008-11-04 2010-06-02 John Dalton Griffith Rapier loom drive mechanism
KR101222404B1 (ko) 2012-07-10 2013-02-05 (주) 미도랜드 노면포장재 제조용 친환경 직조기
CN114990764A (zh) * 2022-05-11 2022-09-02 梁源照 一种剑杆织机及其剑杆带防磨损装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH577575A5 (en) * 1973-02-19 1976-07-15 Sparling Robert O Rapier loom - in which weft threads are carried on vertical flexible tapes with reed and finger supports
AT368200B (de) * 1980-05-28 1982-09-27 Saurer Ag Adolph Antriebsvorrichtung fuer das antriebszahnrad des traegerbandes fuer den schussfadengreifer an schuetzenlosen webmaschinen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE161060C (de) *

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH577575A5 (en) * 1973-02-19 1976-07-15 Sparling Robert O Rapier loom - in which weft threads are carried on vertical flexible tapes with reed and finger supports
AT368200B (de) * 1980-05-28 1982-09-27 Saurer Ag Adolph Antriebsvorrichtung fuer das antriebszahnrad des traegerbandes fuer den schussfadengreifer an schuetzenlosen webmaschinen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
INDUSTRIE TEXTILE, no. 1101, June 1980, pages 539-540, Paris, FR; J. PILISI: "Le tissage à bras contemporain" *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114875556A (zh) * 2022-06-16 2022-08-09 安徽恒益纺织科技有限公司 一种复合材料纺织布制造设备

Also Published As

Publication number Publication date
DE68922683D1 (de) 1995-06-22
EP0363016A3 (de) 1991-08-14
GB8820952D0 (en) 1988-10-05
IN176606B (de) 1996-08-03
EP0363016B1 (de) 1995-05-17

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