US3739816A - Control apparatus for wave shed forming means - Google Patents

Control apparatus for wave shed forming means Download PDF

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Publication number
US3739816A
US3739816A US00137877A US3739816DA US3739816A US 3739816 A US3739816 A US 3739816A US 00137877 A US00137877 A US 00137877A US 3739816D A US3739816D A US 3739816DA US 3739816 A US3739816 A US 3739816A
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United States
Prior art keywords
arm
lever
shaft
double
pin
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Expired - Lifetime
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US00137877A
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English (en)
Inventor
Z Miks
Z Solik
Z Kramenic
V Vasek
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Vyzkumny Ustav Bavlnarsky AS
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Vyzkumny Ustav Bavlnarsky AS
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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
    • 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
    • D03D47/26—Travelling-wave-shed looms
    • D03D47/262—Shedding, weft insertion or beat-up mechanisms
    • D03D47/267—Shedding mechanisms

Definitions

  • the lever means being adjustable.
  • independent drive means for lifting and lowering every rod are indis pensable, said drive means comprising, e.g. eccentric rotary pins arranged on a common drive shaft traversing the entire width of the wave weaving loom and, usually, double-arm levers insuring the transmission of the rotary movement of the said eccentric pins angularly shifted with respect to one another, and possible angularly shifted cams for the respective shaft rods.
  • Another known apparatus for creating a travellingwave harmoniously repeated shedding movement employs heddles forming the angle of the shed at the end of which the fabric closes, during the deflection of these heddles a shuttle with weft travelling through the shed.
  • the heddles are threaded at least on one wire which is freely flexible and which is gripped at certain intervals by lifting hooks moving forcedly up and down with a phase shift, inducing thewave-like motion of said wire.
  • the reciprocating movement of the lifting hooks is actuated by means of helically threaded control shafts traversing across the looms.
  • the known devices substantially lack the possibility, while some of them preclude it altogether because of their fundamental design factors, of regulating the value of the amplitudes of all wave sheds, to adjust the heights of individual shafts, further to close all shed waves, thus aligning all warp threads in one plane, and last but not least, the possibility of drawing in the warp threads outside the loom, or of exchanging the heddles outside the loom.
  • the present invention avoids all of the abovementioned disadvantages of known devices and methods, while pursuing the aim of creating a simple method of controlling the movement of shaft rods, and while taking fully into consideration the highly important re quirements of weaving technology, so that, for example:
  • the optimum weaving conditions can be adjusted, especially when weaving from different material, by changing the amplitude (height) of the shed wave;
  • all shed waves can be removed, i.e. all warp fell of the just woven can be aligned into one place to enable the warp threads to be machine joined;
  • a part or the entire shedding mechanism can be removed, enabling the warp threads to be more easily drawn in into the eyes of the heddles; this can have a considerable beneficial effect upon the productivity of the weaving loom;
  • the arrangement of secured eccentric pins in the rotary connections of the shedding mechanism permits very precise adjusting of every rod, and consequently also every shaft with respect to one another, in order that the side dead centers of all shafts be identical across the entire width of the warp with respect to the weaving plane;
  • the division of the shedding mechanism into single units facilitates the assembly of the loom, production thereon, and later on also the maintenance of the loom;
  • the presence of one driving cam or one eccentric member in a section serve, in cooperation with a suitable lever means, to actuate all working movements of the shaft rods, and possibly also the movements of the heddles.
  • the countermovement of at least two shaft rods of one section moving in forced opposite directions is actuated by a lever means which is phase shifted with respect to the other sections and reciprocates in accordance with the phase shift; the ratio of arms of the lever means is changeable and the point of tipping-being adjustable; after excluding the cams, while symmetrically limiting the dead center area of the lifting means of shaft rods, the said shaft rods are displaced into alignment.
  • FIG. 1 is a side view of the general embodiment of one section of a first embodiment of the extractable shedding mechanism with a horizontal drive, a control system and mechanism for closing the shed waves;
  • FIG. 2 is a side view of the general embodiment of an alternative extractable shedding mechanism with a vertical drive and a mechanism for closing the shed waves;
  • FIG. 3 is a view in plan of an alternative embodiment of the shedding mechanism according to FIG. 2, the drive mechanism being omitted for clarity of illustration;
  • FIG. 4 schematically illustrates the lifting means of the shaft rods and shows the paths of the heddle eyes
  • FIG. 5 is a view of the cam and its adjacent link of the drive mechanism of one section
  • FIG. 6 is a view in cross-section of a cam and a link of the drive mechanism, the section being taken along line 6-6 of FIG. 5;
  • FIG. 7 is a detailed illustration of a rotatable and shiftable connection of the control system and the lifting means of the shaft rods using a secured eccentric P
  • FIG. 8 is a view in axial section of the rotatable and shiftable connection according to FIG. 7, the section being taken along the line 8-8 of FIG. 7;
  • FIG. 9 is a diagrammatic representation of the device for closing the shed waves in one section
  • FIG. 10 is a fragmentary view in front perspective of a loom incorporating the shedding mechanism shown in FIGS. 1 and 2 of the drawings.
  • the following description relates to one section of the shedding mechanism only, the plurality of other sections in the loom being identical.
  • the shedding device As shown in FIG. 1, the shedding device according to the present invention consists of four main units cooperating with each other: a drive mechanism 1, a lifting means 2, a control system 3, and a device for eliminating the shed waves and bringing all of the warp threads into a single plane.
  • the shedding device has main frames 5.
  • the drive mechanism 1 is formed substantially by a drive shaft 11 which crosses the loom and by earns 12 (one shown) with which the shaft is provided.
  • the cams 12 are angularly displaced with respect to each other with a certain phase shift, and their number corresponds with that of the individual sections of the shedding mechanism, which is further determined by the weaving width of the loom and by the number of cycles of the shed wave.
  • Each of the cams 12 is provided at both sides with a shouldered hub 121 (FIG. 5) which is continuously contacted with the guiding surface 13a of spaced parallel glide members 13, 13' of a horizontally arranged link 15.
  • the link 15 has the shape of a double fork with an inserted roller 14.
  • the ends of the bifurcated lever 15, arranged one above the other, carry cross bars 16 which are adjustable around a pin 17, each bar 16 being provided with a slot 18 through which a fixing bolt 19 extends.
  • a second roller 14 is disposed be tween each pair of these cross bars l6.
  • rollers 14, 14 of the link 15 roll around the cam 12, the shape of which insures a constant distance of the centers of rollers 14, 14' during their continuous rolling around the cam 12, while the connecting line 123 of said centers always intersects the axis of rotation 122 of cam 12.
  • the link 15 is pivotally connected by means of a pin 210 to a lever 21 which forms part of the lifting means 2.
  • the lever 21 has at one end a head 211 (at the top in FIG. 1) and a fork 212 at the other end.
  • the lever 21 is connected to the direct lever lifting means 2 for the rods 25 and 27 of shafts (not illustrated) by means of said head 211.
  • These direct lever lifting means 2 comprise at least one three-arm lever 22 and one double-arm lever 24.
  • the three-arm lever 22 of the lifting means 2 is rotatably connected with the head 211 of the lever 21 and is pivotally mounted on a lower pin 221' of the holder 222 of the section.
  • the second, intermediate arm of the three-arm lever 22 is pivotally connected to the lower end of the rear rod 27 of the shaft; an upper guide arm 28 which is rotatably mounted on the upper pin 221 of the holder 222 of the section is pivotally connected to rod 27.
  • the upper pin 221 also serves as the fulcrum of the adjacent double-arm lever 24.
  • One arm of the double-arm lever 24 is pivotally connected to the front rod 25 of the shaft, rod 25 being pivotally connected at its lower end to a lower guiding arm 26, which is rotatably mounted close to the three-arm lever 22 on the common lower pin 221 of the holder 222 of the section.
  • the second arm of the double-arm lever 24 is pivotally cross-connected by means of a connecting rod 23 back to the third arm of the three-arm lever 22.
  • This entire unit which consists of a holder 222 with a threearm lever 22 and a lower guide arm 26 rotatable on the lower pin 221, and the upper guide arm 28 with the double-arm lever 24 on the upper pin 221, and the front and rear rods 25 and 27 of the shafts, is independently extractable from the frame of the loom.
  • the control system 3 is carried by the cross beam 53.
  • System 3 has its vertical position determined by set screws 301 and is secured in adjusted position by bolts 302.
  • Two or more brackets 30 arranged to form a rigid unit on the cross beam 53 carry two shafts 31 and 41 parallel with the cam shaft 11.
  • Shaft 31, which is fixed, is provided with a set of bell cranks 32 which can be turned individually; the number of cranks 32 is the same as the number of lifting means 2.
  • the generally vertical arm of bell crank 32 carries an eccentric pin 34 with a fixing bolt 35.
  • a slide 33 is loosely joumalled so that it can be shifted to project into the fork 212 of the lever 21, serving as its tipping point.
  • disc 321 At the outer end of the other am of the bell crank 32a disc 321 is rotatably mounted, disc 321 being gripped by the open edge of the surfaces 421, 420 (FIG. 9) of the functional part of a segment 42, which is arranged on a rotatable shaft 41.
  • the profile bars 452 and 462 of the device 4 for closing the shed waves are fixedly secured to the respective rotatable shafts 451, 46 1. Said bars are disposed across the loor'n'in the area of the dead centers of individual heads 211 of the levers 21, that is to say, in the area of the dead centers of the lifting means 2, e.g. the threearm levers 22.
  • the described shedding device is arranged between sidewall members 51 which are connected to each other by cross beams 52, 53.
  • the shedding device is accommodated on rollers 54, 54', thus permitting the entire shedding device to be extracted out of its guiding means (not shown) on the inner confronting sides of the said sidewalls 51.
  • the described apparatus operates as follows:
  • FIG. 1 Before the beginning of the working (weaving) process the individual elements of the shedding device are in a position illustrated in FIG. 1, where there is shown an embodiment with a horizontal drive.
  • the bell crank 32 of the control system 3 is held by the segment 42 of the device 4 for closing the shed waves, while its disc 321 is held in a position in which the axis of the eccentric pin 34 lies in the level of the axis V passing through the axes of the pins 221, 221 of the holder of the section 222.
  • the heads 221 of the lever means 21 form, in the horizontal direction, a wave line corresponding with the angle of turning of each cam 12 of the drive 1.
  • This horizontal wave line is transformed into a vertical wave line by the lifting means 2, determining the position of individual shaft rods, e.g. 25.
  • the shaft rods 27 are moved through the same distance from the axis of symmetry of said wave line, but in the opposite direction.
  • the process goes on as follows:
  • the head 211 of the lever means 21 moves from the left to the right, and thus tips the three-arm lever 22 around the pin 221 of the holder 222 in a counterclockwise direction, i.e. the shaft rod 27 moves upwards, controlled by the guide lever 28, supported exactly over the three-arm lever 22.
  • its second arm transmits the movement to the double-arm lever 24 mounted on the common upper pin 221 of the holder of the section 222. Consequently, the shaft rod 25 connected with the double-arm lever 24 performs the movement downwards, turning the lower guide lever 26 counterclockwise around the lower pin 221' of the holder of the section 222, Le. opposite the direction of rotation of the three-arm lever' 22.
  • the bolts 302 of the control system 3 are loosened.
  • the entire system of bell cranks 32 is then moved as required, including the segments 42, on the brackets 30 in the vertical direction.
  • the slides 33 enter deeper into the forks 212 of the lever 21.
  • the distance of the head 21 1 from the pin 210 of the lever 21 is constant, as is also the stroke of the link 15, but the distance between the pin 210 and the eccentric pin 34 has decreased, whereas the length of the path of the moving head 211 of the lever 21 has increased, thereby increasing the height of the shed wave.
  • the function of the device 4 for closing the shed waves comprises two operations dependent upon each other.
  • FIG. 9 first of all the fixed fulcrum of the lever 21 formed by the eccentric pin 34 of the slide 33 is eliminated by turning the shaft 41 with the arranged set of segments 42 by pulling the chain 44 by chain control means (not shown) in the direction X from the position given by the axis Y to the position of the axis X
  • the discs 321 are released from the grip of the open wedge of the segments 42.
  • the spring 47 is tensioned and under simultaneous turning of the sprockets 45, 46 the thus actuated movement is transmitted to the shafts 451, 461 of the profile bars 452, 462.
  • the tension of the spring 47 results in its movement in the direction Y.
  • the profile bars 452, 462 turn from the position of the axes X to the position of the axes Y, thus increasing the space between the profile bars 452, 462 to the original width.
  • the chain 44, turning the sprocket 43 of the shaft 41 tips the segments 42 from the position X to the position Y Owing to the curvature 420 of the segments 42, the pressure in the upwards direction effects the discs 321 of the bell cranks 32 forming the lower half-waves of the shedding wave.
  • the movement transmitted by the slide 33 on the fork 212 of the levers 21 adjusts the said fork at the level V.
  • the levers 21 which have been tipped around the pin 210 actuates the stroke of one half of the shaft rods 25, 27 (the upper shed) by means of the respective levers of the lifting means 2.
  • the discs 321 of the bell cranks 32 forming the upper halfwave of the shedding wave-line bear consecutively against the function surface 421 of the segment 42.
  • the pressure resulting from this contact which is transmitted by the lever 21 on the transmission mechanism 2, brings about the movement of the remaining half of the shaft rods 25, 27 (the lower shed).
  • the discs 321 are gripped by the wedge of the function parts 420, 421 of the segments 42; the position of the eccentric pins 34 is thus secured on level V and the loom is prepared for switching on.
  • FIG. 2 there is there shown an embodiment of the present invention with a so-called vertical drive. Except for the control system 3 of FIG. 1, the embodiment of FIG. 2 is substantially identical therewith.
  • the arrangement of lifting means 2 in FIG. 2 is the same as in FIG. 1, only the sidewalls 55 of FIG. 2 have been changed.
  • a vertically movable link 151 has been also mounted on can 12 in the same way, while at the end with which it meshes with the horizontal arm of the three-arm lever 22 it is provided with an open groove 152 which is directed, in the central position of the stroke of the link 151, towards the turning point of said three-arm lever 22.
  • Every link is provided with a slot 153 with a transverse pin 416 which is connected, by means of at least two connecting bars 415, with the sleeves 414 of at least two eccentric members 411 arranged on a common shaft 410.
  • the eccentric members 411 are further provided with fixed fingers 412, which are connected with one another by means of the rod 413.
  • the vertical movement of the link 151 is derived from the cam 12 on the shaft 11 directly on the three-arm lever 22 of a transmission mechanism 2 as above-described.
  • the lifting means 2 In order to closing the shed waves, the lifting means 2 must be disconnected from the drive mechanism 1.
  • the eccentric member 411 rotates in the sleeve 412.
  • the resultant horizontal force of their movement is transmitted by the connecting bars 415 on the transverse rod 416 in the grooves 153 of the links 151.
  • the deflection oflinks 151 from the vertical position sets in, and the pins 155 of the three-arm levers 22 move out of engagement with the forks 152 of the links 151.
  • the simultaneous opening of the shed waves is performed by turning the shaft 410 with the eccentric members 411 from the position Z to the position 2,.
  • the connecting rods 415 attract the links 151 from the tipped position into the vertical position by means of the transversal rod 416.
  • the pins on the three-arm levers 22, which have been arranged into a vertical wave-line are drawn to the narrowed part of the fork 152 by means of the movement of the links 151 and through the cooperation of the broadened forks 152 of the links 151.
  • the shaft rods 25 and 27 assume positions corresponding with the position of the earns 12 of the shaft 11 of the drive mechanism 1. The entire transmission system is then able to reproduce the movement determined by the drive mechanism 1.
  • an apparatus for controlling the movement of shaft rods being arranged in a frame and divided into sections extending across the loom, each section comprising an upper one-armed guiding lever mounted on an upper pin in the frame, an upper double-arm lever swingably mounted on the upper pm,
  • a front shaft rod jointly connected to one arm of the upper double-arm lever and to the lower onearmed guiding lever
  • a double-arm driving lever one arm of which being jointly connected by means of a head to the third arm of the three-arm lever
  • Apparatus according to claim 1 comprising a fork on the second arm of the double-arm driving lever
  • Apparatus according to claim 1 comprising a drive shaft extending across all the sections of the apparatus,
  • cam disposed on the drive shaft and displaced with respect to cams of other sections. with a certain phase shift, said cam being provided with a shouldered hub on both of its sides,
  • each of the cross bars being provided with a slot through which a fixing bolt extends.
  • the frame comprises two sidewall members connected to each other by cross beams and equipped with rollers and separably mounted in the loom.
  • Apparatus according to claim 8 comprising a pin on the third arm of the three-arm lever, said last-named pin engaging a groove in the link.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US00137877A 1970-04-28 1971-04-27 Control apparatus for wave shed forming means Expired - Lifetime US3739816A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS2941A CS150377B1 (es) 1970-04-28 1970-04-28

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US3739816A true US3739816A (en) 1973-06-19

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US (1) US3739816A (es)
JP (1) JPS5236185B1 (es)
AT (1) AT310690B (es)
CA (1) CA940418A (es)
CH (1) CH530493A (es)
CS (1) CS150377B1 (es)
DE (1) DE2119882C3 (es)
ES (1) ES390953A1 (es)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3831638A (en) * 1971-09-15 1974-08-27 A Rotenburg Shedding mechanism for looms
US3866634A (en) * 1973-05-05 1975-02-18 Zinovy Yakovlevich Rutkevich Shedding motion for loom
US3900050A (en) * 1973-02-02 1975-08-19 Rueti Ag Maschf Reed dent arrangement
US4071053A (en) * 1975-10-03 1978-01-31 Nuovo Pignone S.P.A. Device for the formation of the shed in a multished loom
US4448220A (en) * 1980-12-23 1984-05-15 Aktiengesellschaft Adolph Saurer Method for operating a two-phase gripper loom and two-phase gripper loom for performance of the method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CS189122B1 (en) * 1973-10-24 1979-04-30 Zdenek Kramenic Apparatus for controlling heddle frame liftrod motion in travelling wave shedding looms

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2592820A (en) * 1945-12-12 1952-04-15 Sulzer Ag Harness control
US2841184A (en) * 1956-01-06 1958-07-01 Magee Carpet Co Heddle control mechanism for looms
DE1072569B (de) * 1959-12-31 Durkoppwerke Aktiengesellschaft, Bielefeld Flachwebmaschine mit horizontalem Kettenfadenverl'auf sowie mit längs der Webbreite als Wanderwelle fortschreitender Fachbildung
US3307592A (en) * 1965-08-16 1967-03-07 Draper Corp Loom shedding mechanism
US3460582A (en) * 1966-09-14 1969-08-12 Hindle Son & Co Ltd Loom dobbies

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1072569B (de) * 1959-12-31 Durkoppwerke Aktiengesellschaft, Bielefeld Flachwebmaschine mit horizontalem Kettenfadenverl'auf sowie mit längs der Webbreite als Wanderwelle fortschreitender Fachbildung
US2592820A (en) * 1945-12-12 1952-04-15 Sulzer Ag Harness control
US2841184A (en) * 1956-01-06 1958-07-01 Magee Carpet Co Heddle control mechanism for looms
US3307592A (en) * 1965-08-16 1967-03-07 Draper Corp Loom shedding mechanism
US3460582A (en) * 1966-09-14 1969-08-12 Hindle Son & Co Ltd Loom dobbies

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3831638A (en) * 1971-09-15 1974-08-27 A Rotenburg Shedding mechanism for looms
US3900050A (en) * 1973-02-02 1975-08-19 Rueti Ag Maschf Reed dent arrangement
US3866634A (en) * 1973-05-05 1975-02-18 Zinovy Yakovlevich Rutkevich Shedding motion for loom
US4071053A (en) * 1975-10-03 1978-01-31 Nuovo Pignone S.P.A. Device for the formation of the shed in a multished loom
US4448220A (en) * 1980-12-23 1984-05-15 Aktiengesellschaft Adolph Saurer Method for operating a two-phase gripper loom and two-phase gripper loom for performance of the method

Also Published As

Publication number Publication date
ES390953A1 (es) 1974-04-01
CS150377B1 (es) 1973-09-04
JPS5236185B1 (es) 1977-09-13
DE2119882B2 (de) 1978-03-30
DE2119882C3 (de) 1978-11-23
DE2119882A1 (de) 1971-11-18
AT310690B (de) 1973-10-10
CH530493A (de) 1972-11-15
CA940418A (en) 1974-01-22

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