US3331401A - Bobbin change device for weft replenishing looms - Google Patents

Bobbin change device for weft replenishing looms Download PDF

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Publication number
US3331401A
US3331401A US585974A US58597466A US3331401A US 3331401 A US3331401 A US 3331401A US 585974 A US585974 A US 585974A US 58597466 A US58597466 A US 58597466A US 3331401 A US3331401 A US 3331401A
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Prior art keywords
bobbin
transfer
weft
magazine
transfer members
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Expired - Lifetime
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US585974A
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English (en)
Inventor
Wirz August
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Saurer AG
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Adolph Saurer AG
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D45/00—Looms with automatic weft replenishment
    • D03D45/20—Changing bobbins, cops or other loom components carried by the shuttle

Definitions

  • ABSTRACT F THE DISCLOSURE Bobbin transfer mechanism for weft replenishing function in a weft replenishing loom comprising suction manifold means common to all bobbin transfer members and a weft bunch stripper which responds to the downward displacement of the ltransfer members for automatic operation.
  • This invention is a continuation-impart of application Ser. No. 395,700, tiled Sept. l1, 1964, now abandoned, and relates to looms, and more particularly to automatic ⁇ bobbin change mechanisms for weft replenishing looms, and weft bunch removing devices associated with said bobbin change mechanism.
  • Weft replenishing looms which include a stationary bobbin magazine having a number of compartments, each containing bobbins of a specific group disposed adjacent to one another, and a corresponding number of bobbin transfer members which are moved automatically from their normal position into a transfer position common to all transfer members and disposed above the shuttle to which a bobbin is to be transferred.
  • the weft bunch disposed at the tip of the bobbin must be stripped off, and the art is replete with disclosures of weft bunch removing devices, none of which, however, has been completely successful.
  • the invention contemplates providing each bobbin transfer member of the kind designed to be displaced into a transfer position common to all such members, with a weft bunch stripping device and with a conduit, the orifice of which can be operatively connected with a suction manifold common to all bobbin transfer members, the weft bunch stripping device being set in operation on downward displacement of the bobbin transfer member.
  • FIG. l is a schematic representation of an assembly, according to the invention, in vertical section along line n--a in FIG. 2;
  • FIG. 2 is a plan view of section of the assembly shown in FIG. l, with certain parts omitted for clarity, the upper part of FIG. 2 being a plan View section along line c-c-c-c, the lower part a plan view section along line b-b-b-b in FIG. l;
  • FIG. 3 is a showing similar to that of FIG. 1 illustrating,
  • FIG. 4 is a plan view of the assembly shown in FlG. 3 with parts omitted for clarity;
  • FIG. 5 is a section along lines e-e in FIG. 2;
  • FIG. 6 is a detail shown in FIGS. 2 and 4 on the rig-ht, drawn to a larger scale;
  • FIG. 7 is an end view looking at the device of FIG. 1 from the left, including additional parts;
  • FIG. 8 is a vertical section, on a larger scale, taken along line f-f in FIG. 3 including some parts not shown in FIG. 3 and excluding some parts shown thereon.
  • the bobbin magazine 1 comprises two walls 2 and 3 and provided in the walls sets of radially opposed grooves 2 and 3 which form compartments A, B, C, D. Individual groups of bobbins 4 are accommodated in the compartments A, B, C, and D (FIG. 8) which are disposed adjacent to one another in the magazine 1. As seen in FIG. 5, the lower part of the wall is wedge-shaped.
  • a head plate 5 faces the larger peripheral wall 2 of magazine 1 and is provided with curved guide slots 6, 7, 8 and 9 (see FIGS. 2, 4, and 7), their number corresponding to the number of compartments in the magazine. As they extend downwardly, the slots converge toward the vertical center plane of plate 5.
  • an oblong slide 10 has pins 11 and 12 that engage the curved slots 6, 7, 8 and 9, the upper pins 11 being attached to draw springs 13 which aim to keep the respective slides 10 in the upper terminal or rest position. Slide 10 is actuated by means of pin 11 on commencement of the bobbin change.
  • the general arrangement of the curved slots is as shown in U.S. Patent No. 2,836,202 and the actuation of the pin 11 takes place through a pushing rod by means of a lever system which is explained in this patent and will be repeated as follows:
  • a guide rod 72 is connected with a pirn feeler device (not shown) provided for the shuttles.
  • the guide rod 72 controlls a ball crank lever 73 :having arms 73a and 73b which is pivotally supported on a xed bolt 74 to assist in controlling a pushing rod 75 pivoted to the upper arm 731; of bell crank lever 73.
  • the pushing rod 75 is also connected, by a guide rod 76, with the upper arm of a bell crank lever 77 which is pivotally supported on a fixed bolt 78 and the second arm of which is connected with a control rod 79 whose movements are governed by the control for the vertical displacements of the shuttle box (drop box).
  • FIGS. 2, 4 and 7 for the movement of the pins and also to FIGS. 7 and 8 for the illustration of the shuttle F with the transfer ⁇ position of the bobbin shown in FIG. 8 at a location above the shuttle F.
  • each bobbin compartment in Ithe magazine has its own transfer member and the present illustration in FIGS. 2, 4 and 8 labels the four compartments A, B, C and D respectively, whereby the positions Vcompartment C and in the position IV the pin 3 I, II, III, 1V of the pushing rod 75 and the positions I, II, III, IV of the bell crank lever 77 (FIG. 7) correspond to the compartments A,B, C, D (FIG. 8).
  • the pushing rod 75 and the bell crank lever 77 are placed in ythe position marked I, the pushing rod 75 will Vactuate before a bobbin change, the pin 11 of the slide 10 belonging to compartment A, in the position II the pin 11 of the slide 10 belonging to compartment B, in the position III the pin 11 of the slide 10 belonging to 11 of slide 10 belonging to compartment D.
  • each compartment A, B, YC and D there is thus arranged the associated transfer member 14, which on the left has a pin 15 terminating in a spherical head 16, the head 16 engaging a tubular portion 17 of the slide 1t) which is correlated with this transfer member 14.
  • the bobbin compartment of the bobbin transfer members 14 is elastically closed at its bottom side by means of leaftype springs S (FIG. 8).
  • the bobbin transfer member 14 extends through slide guide 1S to a rod 19 which, by means of a U-shaped portion 20, a portion 21 and pin 22, is mounted in the fixed support 23.
  • Slide guide 18 is provided with a conduit 25 which terminates in an orifice 26.
  • the support 23 at the top mounts a pin 24 (FIGS. 1, 2, 3 and 4).
  • a two-armed lever 27, 28 is mounted for rocking displacement on bolt 24.
  • the two-armed lever 27, V28 is connected, on the one hand, through rod 29 with the stripping slide 30 guided on the slide guide 18 and, on the other hand, through connecting piece 31, with a lever 32 mounted on portion 21.
  • Stripping slide 30 is provided with the pivotally mounted stripping jaws 50 carrying pins 49. Springs 51 tend to pull the stripping jaws 50 together.
  • conduits 35 and 36 From an air pump 70 two conduits 35 and 36 lead to a control valve 37 from which a conduit 38 extends to the sucking device for change of thread, while conduit 39 leads to the injector'A 40.
  • Suction pipe 41 terminates underneath the orifice 26 of conduit 25.
  • Conduit 42 extends to a collector 71 as shown in FIG. 1 and FIG. 3.
  • the control valve 37 is operated on commencement of the bobbin transfer, via rod 45, lever 46 and slide 47.
  • the device of the invention operates as follows:
  • valve 37 is adjusted to permit the pump to convey air through conduit 38 as well as conduit 39.
  • bobbin transferrmember 14 ' is displaced through pin 11 Iby means of a pushing rod in a manner known in the yart :and shown in FIG. 7, into its transfer position, the valve 37 is adjusted so thatv the air volume deriving from both forward and return strokes of the pump is conveyed to the injector 40 which is located on conduit 42 (FIG. 3);
  • the particular bobbin 4 selected for the transfer has been inserted in the correlatedtransfer member 14, and this member 14 is disposed in the transfer position common to all the transfer members and locatedY above the shuttle to which the bobbin is to be transferred.
  • 60 denotes the hammer provided to eject the exchange bobbins 4.
  • the hammer is controlled by the bobbin feeler dev-ice in a manner known in the art.
  • the hammer 66 is pivotally mounted on a fixed bolt;61.
  • F denotes a shuttle and G an empty bobbin still in the shuttle but about to be replaced by a full replacement bobbin.
  • a unit 63 comprises shaft 64 and pawl unit 65 and the shaft 64 pivotally supports a two-armed top pawl 65 which is influenced by a draw spring 62. This spring ⁇ tends to keep the pawl 65 in Va position where its longer arm extends into the path of any bobbin emerging from the respective compartment for the purpose of preventing the bottom bobbin 4 from issuing from the compartment prematurely.
  • FIG. 7 shows how a bobbin transfer from the position below the compartment into a transfer position common to vall transfer members loc-ated above the shuttle which is to receive the bobbin.
  • a weaving operation uses ya bobbin 4 deriving from compartment D (FIG. 8) and -the control rod 79 is in its lowermost position which it assumed in the course of the preceding transfer operation, where the two arms of the bell crank lever 77 take up the position marked IV in FIG. 7.
  • the bobbin change is initiated in such a known manner that the changer aggregate causes the respective shuttle box to move into that position where the shuttleshed is in transfer position with respect to the corresponding bobbin.
  • the control rod 79 is automatically displaced upwardly until Vthe bell crank lever 77 assumes the position indicated by I, I in FIG. 7, whereby the pushing rod 75, controlled by the guide r-od 76, is in its turn moved into its I position.
  • the feeler device initiates the exchange of bobbins by causing the guide rod 72 to displace the bell crank lever 73 clockwise.
  • the pushing rod 75 linked to the bell crank lever 73, pushes the slide 10 correlated w-ith compartment A downward on plate 5, counteracting spring 13 on the pin 11 with the result that the bottom bobbin 4 in the'bobbin transfer member below compart- Y v by means of the hammer 611, into the shuttle F whereupon the hammer 60 returns to the initial, rest position.
  • the feeler device moves the guide rod,72'(to the right in FIG.
  • a weft replenishing loom of the type having a shuttle, a stationary bobbin magazine and said magazine enclosing a plurality of compartments which contain a series of bobbins, the separate bobbins of said series being distinguished from one another by color and by material, each series being disposed adjacent one another in said magazine, the improvement consisting ⁇ of a bobbin transfer assembly having a number of transfer members corresponding to the number of said magazine compartments, each of said bobbin transfer members being displaced downwardly and sidewardly to a transfer position above the shuttle which is the same position for all of said transfer members, a weft bunch removing device arranged on each of said bobbin transfer members, a conduit in each of said transfer members, suction means, an orifice at the end of each said conduit, a suction pipe on said suction means, means for registering and pneumatically connecting one of said oriices with said suction pipe, and means responsive to the downward displacement of said transfer members and adapted to actuate said weft bunch
  • suction means include a vacuum pump, an injector on said pump and an adjustable control valve interposed between said pump and said injector, said control valve synchronizing the air volume from said pump to said injector at the commencement of a bobbin change.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
US585974A 1963-09-20 1966-10-11 Bobbin change device for weft replenishing looms Expired - Lifetime US3331401A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1163463A CH411738A (de) 1963-09-20 1963-09-20 Schussspulen-Auswechselvorrichtung

Publications (1)

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US3331401A true US3331401A (en) 1967-07-18

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US585974A Expired - Lifetime US3331401A (en) 1963-09-20 1966-10-11 Bobbin change device for weft replenishing looms

Country Status (6)

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US (1) US3331401A (de)
AT (1) AT250264B (de)
BE (1) BE652883A (de)
CH (1) CH411738A (de)
DE (1) DE1535286B1 (de)
GB (1) GB1033236A (de)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2845957A (en) * 1956-10-15 1958-08-05 Draper Corp Automatic bobbin replenishing loom
US2872948A (en) * 1956-08-31 1959-02-10 Draper Corp Automatic bobbin replenishing loom
US2954058A (en) * 1958-08-20 1960-09-27 Draper Corp Filling bunch extractor
US2956593A (en) * 1957-08-15 1960-10-18 Fischer Ag Georg Automatic charging device for pirn changing apparatus
US3010488A (en) * 1959-03-24 1961-11-28 Draper Corp Replenishing mechanism for looms
US3067778A (en) * 1959-09-11 1962-12-11 Rueti Ag Maschf Braking device for thread for an automatic loom
US3101099A (en) * 1961-02-06 1963-08-20 Crompton & Knowles Corp Weft bunch remover
FR1337693A (fr) * 1962-10-30 1963-09-13 Saurer Ag Adolph Dispositif d'enlèvement par dépression de la couronne de fil en réserve sur une canette à introduire dans une navette
US3108619A (en) * 1960-11-15 1963-10-29 Rueti Ag Maschf Pirn bunch removing and holding means

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE624421A (de) *
DE1131605B (de) * 1954-10-06 1962-06-14 Saurer Ag Adolph Schussspulen-Auswechselvorrichtung fuer Wechselwebstuehle
GB1175929A (en) * 1967-11-04 1970-01-01 Harilaos Theochari Hadjikokolo Transportation Apparatus for Bulk Liquids

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2872948A (en) * 1956-08-31 1959-02-10 Draper Corp Automatic bobbin replenishing loom
US2845957A (en) * 1956-10-15 1958-08-05 Draper Corp Automatic bobbin replenishing loom
US2956593A (en) * 1957-08-15 1960-10-18 Fischer Ag Georg Automatic charging device for pirn changing apparatus
US2954058A (en) * 1958-08-20 1960-09-27 Draper Corp Filling bunch extractor
US3010488A (en) * 1959-03-24 1961-11-28 Draper Corp Replenishing mechanism for looms
US3067778A (en) * 1959-09-11 1962-12-11 Rueti Ag Maschf Braking device for thread for an automatic loom
US3108619A (en) * 1960-11-15 1963-10-29 Rueti Ag Maschf Pirn bunch removing and holding means
US3101099A (en) * 1961-02-06 1963-08-20 Crompton & Knowles Corp Weft bunch remover
FR1337693A (fr) * 1962-10-30 1963-09-13 Saurer Ag Adolph Dispositif d'enlèvement par dépression de la couronne de fil en réserve sur une canette à introduire dans une navette

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Publication number Publication date
GB1033236A (en) 1966-06-22
BE652883A (de) 1964-12-31
DE1535286B1 (de) 1969-09-11
CH411738A (de) 1966-04-15
AT250264B (de) 1966-11-10

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