US3480046A - Driving mechanism for the weft inserters of shuttleless looms - Google Patents

Driving mechanism for the weft inserters of shuttleless looms Download PDF

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Publication number
US3480046A
US3480046A US701343A US3480046DA US3480046A US 3480046 A US3480046 A US 3480046A US 701343 A US701343 A US 701343A US 3480046D A US3480046D A US 3480046DA US 3480046 A US3480046 A US 3480046A
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United States
Prior art keywords
inserter
belt
weft
weft thread
pulleys
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Expired - Lifetime
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US701343A
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English (en)
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Antonio Camarasa Monge
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Individual
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Individual
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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 weft inserter is carried for rectilinear reciprocating movement by a carrier member which slides on a bar. From the same bar, rotatable pulleys are suspended by means of forks arranged at either side of the carrier member. The pulleys carry an endless belt to one run of which the carrier member is fixedly attached. The entire pulley-belt system is reciprocated. During the reciprocating movement, the other run of the belt is held at a fixed point so that the belt moves with respect to the moving system and the weft inserter travels in a rectilinear path double the length of the travel of the system.
  • This invention relates to a system for operating weft thread inserters in shuttle-less looms of the type comprising a rigid rectilinear weft inserter, weft thread gripping means provided at one end of the inserter, and means for transmitting the drive to said elements.
  • the device according to the invention comprises two pulleys of equal diameter situated in the same plane and disposed to rotate freely on individual shafts supported by 3,480,046 Patented Nov. 25, 1969 two forks, one at each extremity of a supporting bar, whereby the said pulleys are connected to one another by an endless belt.
  • This assembly is given a reciprocating rectilinear movement which is produced by any known kinematic system or movement transmitting system, and one section of the endless belt is attached at a point between the two pulleys to a movable element which can slide along a stationary guiding bar and which bears the rigid rectilinear weft thread inserter, while the other section of the endless belt is attached to a fixed point.
  • the assembly of the pulleys and the bar supporting the same is supported by the same guiding bar that carries the movable element which bears the rigid rectilinear weft thread inserter, being attached thereto by means of brackets capable of sliding along said guiding bar. Due to the fact that the endless belt is attached to the fixed point, and due to the displacement of the entire assembly consisting of the two pulleys supported on their bar, said movable element which bears the rigid rectilinear weft thread inserter performs a twofold travel along its guide bar, driving the weft inserter and making it perform a reciprocating movement of double length.
  • the fixed point to which the endless belt is attached is constituted by a member that is capable of being displaced over a short distance along a second stationary guiding bar by the action of a connecting rod controlled by a cam, for the purpose of momentarily counteracting the displacement of the movable element bearing the rigid rectilinear weft thread inserter, and hence counteracting the displacement of this same inserter, keeping it in a static position for a short period of time at the end of its travel; this allows of gripping the weft thread and cutting it according to a precise pre-arranged schedule.
  • FIG. 1 is a diagrammatic front elevation of the stroke length multiplying device of the weft thread inserter in shuttle-less looms, in the position of the commencement of its movement through the shed;
  • FIG. 2 is a diagrammatic front elevation of the same device showing the weft thread inserter advanced to half of its travel through the shed;
  • FIG. 3 is a diagrammatic front elevation of the Same device showing the inserter at the end of its travel through the shed to pick up the weft thread, the broken lines representing the position for the counteraction of the weft thread inserted travel so as to keep it in a static position for a brief period of time during the picking up of the weft thread;
  • FIG. 4 is a diagrammatic front elevation of the device embodying the invention, shown assembled to a shuttleless loom, only fragmentary parts of the loom being illustrated.
  • 1 represents the rectilinear inserter of the weft thread
  • 2 the guiding bar supported at points 3 and 4 on which the movable element 5 slides which bears the weft thread inserter 1; said movable element 5 is attached to the belt 6 at point A.
  • Belt 6 runs between pulleys 8 and 9 of equal diameter, which rotate on the shafts 10 and 11 which are supported by forks 12 and 13 mounted on the ends of the supporting bar 14; pulleys 8 and 9 and belt 6 are kept under tension by the tension spring 15 arranged on the supporting bar 14.
  • the entire assembly is slidingly supported on guiding bar 2 by means of brackets 16 and 17.
  • Point A on the lower run d of belt 6 is equidistant from point A on the upper run e; at said point A, the belt 6 is attached to a block 7 slidingly supported on a short guiding bar 18 which in turn is supported at fixed points 19 and 20; the block 7 is also pivotally connected to the rod 21, which is in turn pivotally connected to the end 22 of a crank 23 which pivots at its other end 24 at a fixed point 25 and is in contact with a cam 26 revolving on a shaft 27.
  • FIG. 4 there are illustrated at 33 frame portions of the loom, at 34 and 35 frame portions of the loom heads and at 36 frame portions of the movement transmission means.
  • these movement transmission means comprise a driving motor 37, a transmission belt 38, a driven pulley 39 and a well known hypocycloidal gear mechanism 40, through which the rotating movement of pulley 39 is transmitted as a rectilinear reciprocating movement to the shaft 10 of pulley 8.
  • any driving means applied to the shaft 11 of pulley 9 or to the shaft 10 of pulley 8 as illustrated in FIG. 4, will drive the entire assembly formed by the supporting bar 14 and pulleys 8 and 9 in a reciprocating movement, and as a result the supporting bar 14 is horizontally displaced in the direction of the arrow B, as seen in FIG. 1.
  • the inserter 1 also begins to pick up the weft thread 32, since belt 6 is attached at point A; pulleys 8 and 9 rotate, and belt 6 runs in the direction of the arrows B, pulling the movable element and inserter 1 with it in the same direction as the entire assembly.
  • the inserter 1 continues on its Way through the shed 28 formed by upper threads 29 and lower threads 30 of the warp, until the fully extended position of inserter 1, as shown in FIG. 3, is reached, in which it has covered the full length of its travel.
  • This total travel length 4a has then been obtained by a displacement 2a of the assembly of supporting bar 14 and pulleys 8 and 9, i.e. the length of travel of inserter 1 is twice as long as the length of travel of the assembly of supporting bar 14 and pulleys 8 and 9.
  • a driving mechanism for straight weft inserters of shuttleless looms comprising a supporting bar, a belt drive arrangement slidably supported on said bar, means imparting to said belt drive arrangement a rectilinear reciprocating movement, said belt drive arrangement including two holders slidably mounted on said bar, shafts supported by said holders, pulleys of equal diameter rotatably mounted on said shafts and situated in the same plane, and an endless belt connecting said pulleys; means carrying said weft inserter, said carrier means being slidably mounted on said bar and fixedly connected between said pulleys to one run of said endless belt; means holding the other run of said endless belt so as to produce a movement of the belt and displacement of said slidable carrier means in addition to the displacement of said carrier means in addition to the displacement of the entire belt drive arrangement and to impart to the weft insertor a corresponding rectilinear reciprocating movement.
  • said holding means comprise a second stationary bar, a member fixedly attached to said other run of the belt and slidably mounted on said second bar, means actuating said member, and a cam cooperating with said actuating means to impart to said member and said belt, at the end of the stroke of the weft inserter, a transistory movement in the direction opposite the direction of movement of the belt drive arrangement, so as to hold the weft inserter carrying means with the weft inserter for a short time in a stationary position.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US701343A 1967-01-31 1968-01-29 Driving mechanism for the weft inserters of shuttleless looms Expired - Lifetime US3480046A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES33678267 1967-01-31

Publications (1)

Publication Number Publication Date
US3480046A true US3480046A (en) 1969-11-25

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Family Applications (1)

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US701343A Expired - Lifetime US3480046A (en) 1967-01-31 1968-01-29 Driving mechanism for the weft inserters of shuttleless looms

Country Status (7)

Country Link
US (1) US3480046A (fr)
JP (1) JPS504792B1 (fr)
BE (1) BE708545A (fr)
CH (1) CH468490A (fr)
DE (1) DE1710233A1 (fr)
FR (1) FR1551820A (fr)
GB (1) GB1202613A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3633632A (en) * 1969-12-08 1972-01-11 Monsanto Co Circular weaving apparatus product and process
US3884275A (en) * 1972-11-13 1975-05-20 Anselmo Bolea Camprubi Devices for the actuation of lances in looms without shuttles
US5573523A (en) * 1995-02-09 1996-11-12 Whalen; Johanna B. Flushable sanitary mini-pad

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1060759B (de) * 1958-01-11 1959-07-02 Max Ernst Als Flugzeug, Rakete od. dgl. ausgebildetes Kinderspielzeug
EP0021720A1 (fr) * 1979-07-03 1981-01-07 Bonas Machine Company Limited Dispositif d'insertion de la trame

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2066532A (en) * 1936-03-18 1937-01-05 Mohawk Carpet Mills Inc Loom
US3335760A (en) * 1964-06-26 1967-08-15 Scheffel Walter Gripper looms

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2066532A (en) * 1936-03-18 1937-01-05 Mohawk Carpet Mills Inc Loom
US3335760A (en) * 1964-06-26 1967-08-15 Scheffel Walter Gripper looms

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3633632A (en) * 1969-12-08 1972-01-11 Monsanto Co Circular weaving apparatus product and process
US3884275A (en) * 1972-11-13 1975-05-20 Anselmo Bolea Camprubi Devices for the actuation of lances in looms without shuttles
US5573523A (en) * 1995-02-09 1996-11-12 Whalen; Johanna B. Flushable sanitary mini-pad

Also Published As

Publication number Publication date
GB1202613A (en) 1970-08-19
CH468490A (de) 1969-02-15
BE708545A (fr) 1968-05-02
DE1710233A1 (de) 1971-10-14
FR1551820A (fr) 1968-12-27
JPS504792B1 (fr) 1975-02-24

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