US2867388A - Method of and arrangement for winding the starting end yarn on to pirns in automatic weft pirn winding machines - Google Patents

Method of and arrangement for winding the starting end yarn on to pirns in automatic weft pirn winding machines Download PDF

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Publication number
US2867388A
US2867388A US499486A US49948655A US2867388A US 2867388 A US2867388 A US 2867388A US 499486 A US499486 A US 499486A US 49948655 A US49948655 A US 49948655A US 2867388 A US2867388 A US 2867388A
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United States
Prior art keywords
pirn
yarn
winding
catch hook
empty
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Expired - Lifetime
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US499486A
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English (en)
Inventor
Marx Karl
Staubli Max
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.)
Machinenfabrik Schweiter AG
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Machinenfabrik Schweiter AG
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Publication date
Application filed by Machinenfabrik Schweiter AG filed Critical Machinenfabrik Schweiter AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/10—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers for making packages of specified shapes or on specified types of bobbins, tubes, cores, or formers
    • B65H54/14—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers for making packages of specified shapes or on specified types of bobbins, tubes, cores, or formers on tubes, cores, or formers having generally parallel sides, e.g. cops or packages to be loaded into loom shuttles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the present invention relates to a method of and means for winding yarn or like strand material onto bobbins or pirns in automatic weft pirn winding machines.
  • the yarn is clamped between the head of the newly supplied empty pirn and the driver of the winding machine so as to transfer the thread being wound from the full to the empty pirn while the pirn is changed.
  • the fully wound ejected pirn has a relatively long thread end which, when weaved off in the shuttle, hinders the run of the yarn and may cause faults in the fabric.
  • the present invention aims at eliminating this thread end.
  • the method according to the present invention is carried out by the yarn still engaged by the yarn guide and still connected to the ejected pirn being gripped by a rotating catch hook in such manner as to form a loop which is wound onto the empty pirn, the yarn thereafter being broken off between the finished pirn and the empty pirn and then the yarn is wound in the pirn package of the empty pirn.
  • the method is carried out with the aid of an arrangement including a friction-driven catch hook that rotates during the start of winding and which is brought into range of the yarn by means of a lateral movement parallel to the spindle axis.
  • Fig. 1 shows the pirn driver, an empty pirn clamped in position and an ejected full pirn at the moment of the pirn change, the yarn hook and winding drivearrangement being shown in cross-section;
  • Fig. 2 shows the arrangement according to Fig. 1 at the moment when the catch hook winds the yarn through its loop formation, in two threads on to the empty pirn;
  • Fig. 3 is a diagrammatic view of the catch hook shown on an enlarged scale
  • Fig. 4 is a cross-section of another form of catch hook
  • Figs. 5 to 9 are diagrammatic views of the catch hook v in various positions
  • Fig. 10 shows the collector in the case of a pirn which drops in the upright position
  • Fig. 11 shows a pirn clamp of a weft pirn ejected in upright position
  • Fig. 12 shows the arrangement according to Fig. 1 in conjunction with a collector for the finished pirn and a device for clamping the pirn when the yarn is brokenoff I 2,857,388 Patented Jan. 6, 9
  • Fig. 13 shows the arrangement according to Fig. 12 at the moment when the yarn is broken off
  • Fig. 14 is a view of means designed to swing out the yarn guide during the pirn change
  • Fig. 15 is a top plan view of Fig. 14;
  • Figs. 16 to 25 illustrate various successive positions of an alternative embodiment with catch hook made according to the invention
  • Fig. 16 shows the arrangement after the pirn has been wound
  • Fig. 17 shows the arrangement at the moment when an empty pirn is brought into the clamping position
  • Fig. 18 shows the emptypirn clamped in position
  • Fig. 19 shows the catch hook in its catching position
  • Fig. 20 shows the catch hook in the position in which it has released the loop
  • Fig. 21 shows the path of the empty pirn clamped in position and the thread between the dropped pirn and the thread guide
  • Fig. 22 shows in cross-section the empty pirn clamped in position
  • Fig. 23 shows the catch hook at the moment when it has gripped the thread
  • Fig. 24 shows the catch hook after releasing the loop
  • Fig. 25 is a section taken along line 2525 of Fig. 23.
  • a rod 3 which is caused to reciprocate by a' cam disk 6 via the roller 7, the lever 8, the guide rod 9 and the set collar 11 which is provided with a bolt 15).
  • a housing 13 secured to the front end of the rod 3 by means of the screw 14 is a housing 13.
  • a ball-bearing outer race 15 Arranged in the housing 13 is a ball-bearing outer race 15 and a rotatable ball-bearing inner race 16 which has a gear rim 17.
  • the gear rim 17 is engaged by a gear wheel 18 arranged on the spindle 19 which is driven by the friction wheel 2% when the latter comes into contact'with the pirn driver head 1.
  • the transmission ratio is such that the ball-bearing inner race 16 runs more slowly than, but in the same direction of rotation as, the pirn driver head 1.
  • a catch hook 22 Secured to the ball-bearing inner race 16 is a catch hook 22 which is illustrated in Fig. 3 and will be described in detail hereinafter.
  • Fig. 1 illustrates a position of the various parts of an embodiment of the invention in which the pirn 2 is completely empty and the yarn F is still stretched between the yarn guide 23. and the full pirn S which has been ejected into the collecting box 24.
  • Fig.- 5 further illustrates this position.
  • the yarn F lies on the empty pirn 2 and forms an angle 8 with the radial line '25.
  • the catching slit 22a of the catch hook also forms an angle [5 with the radial line and is so shaped and constructed that the said slit is brought parallel to theryarn section F whereby the yarn catches and engages the slit.
  • the yarn is now carried along by the hook 22, as can be seen from Fig. 6. After half a revolution (Fig. 7) a loop F has already formed so that at the same time the yarn section F leading to the full and ejected pirn S and the yarn section F leading from the yarn guide23 to the empty pirn 2 are wound round the empty pirn.
  • the yarn section F is no longer on the left side of the pirn, but on the right side.
  • the angle of the catch hook no longer corresponds to the position of the yarn section F so that the catch hook due to its particular shape slides away under the yarn section F without being able to take the latter with ita result which is also aided by the facets of the corners 22b and pirn diameter.
  • the catch hook is formed of two parts,.3t and 31, part 31 being elastic so that the yarn can be clamped beneath ituntil it is pulled out as a result ,of the advance.
  • Figs. and 11 illustrate the same device as Figs. 1 to 9, but with the difference that the pirn-2 drops into an upright roller container.
  • the pirn ishere held by means of the cock spring 33, swivellably mounted on the bolt 35, while the yarn is broken oif.
  • the pin 34 on the housing 13 presses against the spring arm 33a, whereby the spring arm 33b is forced against the pirn :
  • Fig 12 shows the finished pirn S, which has dropped 'from the pirn driver 1 and the counter stop 40, with its front part in the hopper 41 and with its piston 2a resting on the plate 42.
  • the housing 13a with the race 16 and the catchhook 22 which, as in Fig. 1, are secured to the rod 3, are shown in withdrawn position.
  • the housing 13a has an arm 13b in which the threaded bolt 44 is screwed and tightened by means of the lock nut 45.
  • the front end of the bolt 44 has no thread, it is rounded and corresponds in diameter to the bore 2b of the pirn tube 2.
  • Rotatably arranged on the threaded bolt 44 and designed as a threaded nut is the bush 46. which has on its front end a driving disk 47 made of rubber or similar material.
  • Mounted on the bush 46 is a torsion spring 48, one end of which is connected to the bush 46 and the other to the arm 13b.
  • the torsion spring 48 is so coiled that it tends to tighten the bush 46 on the threaded bolt 44 in the direction 'of the arm 13!].
  • the housing 13a moves to the left so as to grip the yarn F with the catch hook '22 and to bring it up to the pirn tube 2.
  • the threaded bolt 44 penetrates the bore 2b of the pirn tube and, by means of the driving disk 47, presses the pirn S point first into the hopper 41. During this :movement, thepirn is raised from the plate 42, but it can still rotate.
  • the yarn feeler roller 50 and the yarn guide 51 are, as can be seen “from Figs. 14 and 15,. secured to a swivel arm 52 which is mounted by means of the bolt 53 on the yarn guide 4 slide 54 which moves along the shaft '55 and the rpd 56.
  • the bolt 53' is provided with a twisted tongue 57.
  • Two bolts 58 are secured to the housing arm 13c.
  • the following alternative arrangement differs from the one described in that the catch hook is directly coupled to the driving spindle by axial displacement and is brought into the range of the thread still stretched between the thread guide and the ejected full pirn, which catch grips the thread and, forming a loop, Winds it round the empty pirn, whereupon the loop is released by the withdrawal of the catch hook and the latter is decoupled from the driving spindle.
  • the alternative embodiment is therefore characterized by the fact that the driving spindle and the catch hook axially displaceable in respect of the latter have coupling means which, when the catch hook is displaced, are positively connected for the purpose of driving the catch hook directly by means of the driving spindle.
  • the driving spindle 63 is mounted by means of a ball bearing 62 in the housing 61 of a winding machine, not described in detail, which housing has a guide bush 61a.
  • the bush 64 Arranged on the driving spindle 63 isthe bush 64 which has a gear rim 65 with which the drive wheel 66 of the spindle 67 engages.
  • the bush 64 has a collar.68 in which a holder 69 engages which is arranged on thedisplaceable rod 69a.
  • the driving spindle'63 is horizontally displaceable by means of the rod 6% and the holder 69, the ball-bearing 62 being shifted in the guide bush 61a.
  • the pirn 79 is mounted at one endin the countersupport 72 and at the other in the driver head 63a. iffhe counter support 72 is mounted in theball-bearin'g74 and can rotate freely.
  • a bush 76 concentric to the guide bush 61a and provided With'thfi catchhook 76a. isrotatably mounted by means' of bearing balls "77 injthe sliding bush 78. The latter has a shoulder 78a with which it is connected to the rod 79 mounted in thehous: ing 61 so that it is horizontally displaceable.
  • Theibush 76 has an inward facing head or flange 76b which serves as coupling member and, by acting together with the'rubber ring 63b arranged on the driver 63a, is coupled' ata given moment with thesaid driver (Fig. 19), whereupon the catch hook 76a-is rotated at the same speed as the driver 63a.
  • the bush 78 covers the catch hook'76a but has a notch 78d, the depth of which corresponds to the height of the catch hook 76a (see Fig. 25).
  • Fig. 17 the driver 63a is held in a withdrawn position by the rod 69a.
  • An empty pirn 70a is introduced in known manner with the aid of a lever 73 (-Fig. 21) between the counter support 72 (Fig. 16) and the driver head 63a.
  • the thread F of the dropped pirn 70to the yarn guide is still taut and is laid against the newly inserted empty pirn 70a, as can be seen from Fig. 21.
  • a loop is thus formed which winds round the empty shaft of the pirn 70a, the dropped pirn being easily raised and rota-ting so as to release sufficient thread for the formation of the loop.
  • This movement of the pirn is limited by a stop, the thread breaking when the stop is reached.
  • the groove 78d (Fig. 25) is so bevelled that the thread section P, which now runs on to the right side of the pirn shaft 70a and bears on the edge 7% at P (Fig. 25) can no longer be gripped by the catch hook 76a.
  • the catch hook 76a and the bevelled surface 782 are so adjusted to one another that the latter does not pull the thread P out of the catch hook.
  • the bush 78 with the bush 76 is withdrawn to its starting position (Fig. 16) by the rod 79.
  • the loop is thus released from the catch hook 76a and the rotation of the bush 76 is interrupted because the head 76b ceases to be in contact with the rubber ring 63b.
  • both the loop and the now broken end F (Fig. 24) are wound on to the pirn.
  • a device for winding yarn and like strand material onto an empty pirn in a winding machine in which a portion of said yarn extends from a yarn guide to a full pirn; comprising a first rotatable and displaceable element for drivingly engaging said empty pirn to impart to same a predetermined rotational speed, a second rotatable element provided with a catch hook and arranged for coaxial displacement to said first rotatable element, respective means on said elements coupling said elements with each other upon relative axial displacement of one element to the other, and means intermittently displacing said elements relative to each other, whereby said catch hook is moved toward said yarn guide and within the range of said yarn portion, said catch hook being shaped and constructed, so that it first entrains said yarn portion from one side of the diameter of said empty pirn for transfer to the opposite side of said empty pirn and then releases a yarn loop formed thereby, said rotatable elements upon engagement of said coupling means rotating together, said predetermined rotational speed being greater than that at which
  • said second rotatable element being in the form of a bush concentrically arranged to said first rotatable element, said catch hook being carried within said bush.
  • a device said bush being provided in its front end face with a groove, the depth of said groove corresponding to the distance of said catch hook from said front end face.
  • a device wherein said respective coupling means of said elements are formed by a rubber ring disposed on the surface of said first element and by a flange provided at the rear end face of said bush.

Landscapes

  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
  • Winding Filamentary Materials (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US499486A 1954-04-08 1955-04-05 Method of and arrangement for winding the starting end yarn on to pirns in automatic weft pirn winding machines Expired - Lifetime US2867388A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH803646X 1954-04-08

Publications (1)

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US2867388A true US2867388A (en) 1959-01-06

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US499486A Expired - Lifetime US2867388A (en) 1954-04-08 1955-04-05 Method of and arrangement for winding the starting end yarn on to pirns in automatic weft pirn winding machines

Country Status (5)

Country Link
US (1) US2867388A (enrdf_load_stackoverflow)
BE (1) BE537214A (enrdf_load_stackoverflow)
CH (1) CH325412A (enrdf_load_stackoverflow)
DE (1) DE1063944B (enrdf_load_stackoverflow)
GB (1) GB803646A (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1143746B (de) * 1959-05-11 1963-02-14 Halstenbach & Co Vorrichtung zum Anspulen bei Spulautomaten
GB1069612A (en) * 1964-02-28 1967-05-24 Eizaburo Negishi Method of producing a package on a bobbin and apparatus for catching an end of a feed yarn on a bobbin in a pirn winder and like winders

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB505947A (en) * 1937-10-28 1939-05-19 Schaerer Nussbaumer & Co Improvements in or relating to yarn winding machines
US2614771A (en) * 1949-02-14 1952-10-21 Universal Winding Co Bobbin with strand end attaching means
US2692089A (en) * 1952-12-29 1954-10-19 Schaerer Maschf Method and apparatus for automatically initiating the winding operation of winding machines

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH187399A (de) * 1936-05-28 1936-11-15 Schaerer Nussbaumer & Co Einrichtung zur Einleitung des Wicklungsvorganges an Spulmaschinen, bei denen der Arbeitsstelle jeweils eine leere Spule zubewegt wird.
FR51985E (fr) * 1938-09-21 1943-06-01 Universal Winding Co Perfectionnements aux machines à bobiner du fil ou aux machines analogues
NL63821C (enrdf_load_stackoverflow) * 1946-07-01

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB505947A (en) * 1937-10-28 1939-05-19 Schaerer Nussbaumer & Co Improvements in or relating to yarn winding machines
US2614771A (en) * 1949-02-14 1952-10-21 Universal Winding Co Bobbin with strand end attaching means
US2692089A (en) * 1952-12-29 1954-10-19 Schaerer Maschf Method and apparatus for automatically initiating the winding operation of winding machines

Also Published As

Publication number Publication date
GB803646A (en) 1958-10-29
DE1063944B (de) 1959-08-20
BE537214A (enrdf_load_stackoverflow)
CH325412A (de) 1957-11-15

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