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EP0213962B1 - Verfahren und Vorrichtung zum Verbinden von Vorgarn in Spinnmaschinen - Google Patents

Verfahren und Vorrichtung zum Verbinden von Vorgarn in Spinnmaschinen Download PDF

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Publication number
EP0213962B1
EP0213962B1 EP19860306816 EP86306816A EP0213962B1 EP 0213962 B1 EP0213962 B1 EP 0213962B1 EP 19860306816 EP19860306816 EP 19860306816 EP 86306816 A EP86306816 A EP 86306816A EP 0213962 B1 EP0213962 B1 EP 0213962B1
Authority
EP
European Patent Office
Prior art keywords
roving
bobbin
piecing
head
full
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.)
Expired
Application number
EP19860306816
Other languages
English (en)
French (fr)
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EP0213962A3 (en
EP0213962A2 (de
Inventor
Yoshio Kawasaki
Tatutake Horibe
Kazuo Yamada
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.)
Howa Machinery Ltd
Original Assignee
Howa Machinery 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
Priority claimed from JP19391985A external-priority patent/JP2502969B2/ja
Priority claimed from JP19392085A external-priority patent/JPH0659979B2/ja
Application filed by Howa Machinery Ltd filed Critical Howa Machinery Ltd
Publication of EP0213962A2 publication Critical patent/EP0213962A2/de
Publication of EP0213962A3 publication Critical patent/EP0213962A3/en
Application granted granted Critical
Publication of EP0213962B1 publication Critical patent/EP0213962B1/de
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H9/00—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine
    • D01H9/005—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine for removing empty packages or cans and replacing by completed (full) packages or cans at paying-out stations; also combined with piecing of the roving
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H15/00—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing

Definitions

  • the present invention relates to a roving-piecing method in a spinning frame and a roving-piecing head for use in carrying out said method. More particularly, the present invention relates to a method in which, when the amount of a roving on a bobbin suspended from a bobbin hanger in a spinning frame is reduced, and roving exchange become necessary, the roving of this small bobbin is pieced with a roving of a full bobbin, with which the small bobbin is to be exchanged, and also to a roving-piecing head for use in carrying out this method.
  • the roving on the roving bobbin is only slightly twisted and is very downy, and the roving is broken by only lightly stretching the same. Since mechanical piecing of such a weak roving is difficult, the roving-piecing operation must be manually performed, and this is a hindrance to the enhancement of the labor-saving effect in the roving exchange operation including the roving-piecing operation.
  • EP-A-124,662 discloses a roving-piecing method for use in a roving exchange operation on a spinning frame when the wound diameter of a roving bobbin suspended from a bobbin hanger and from which a roving is withdrawn becomes small, wherein the end of a roving or a rotatably supported full bobbin to be exchanged with the small bobbin is taken out, said end of the roving is held and guided above a trumpet, said end of the roving is piled on the roving of the small bobbin during spinning, the end of the roving of the full bobbin is released, and then the roving of the small bobbin is cut to effect roving-piecing.
  • a secondary object of the present invention is to provide a tool for performing the roving-piecing operation, that is, a roving-piecing head.
  • this invention provides a roving piecing method as disclosed in EP-A-124,662, characterised by moving a sucking opening of an end take-out nozzle to a position opposite to a periphery of the full bobbin, rotating the full bobbin in the rewinding direction, applying a suction force to the end take-out nozzle to suck the free end of the roving into the sucking opening of the end take-out nozzle, moving the sucking opening of the end take-out nozzle to a position over a roving-piecing head to draw out a portion of the roving between the full bobbin and the sucking opening of the moved end take-out nozzle and guide the drawn-out portion of the roving to a roving guide groove of the roving-piecing head, operating a roving holding means to hold the guided portion of the roving in the roving guide groove, moving the roving-piecing head to an upper position away from the trumpet to put a
  • the roving-piecing method preferably comprises the step of hanging the pieced roving withdrawn from the full bobbin on a roving guide.
  • the invention provides a roving-piecing head characterised by comprising a body having a roving guide groove formed in a top end portion thereof, a roving holding lever mounted on the body which is capable of reciprocating across said guide groove and roving holding members arranged on the body on both sides of said guide groove to co-operate with the roving holding lever for holding a roving.
  • the roving-piecing operation in a spinning frame according to the present invention is carried out when the wound diameter of a roving bobbin attached to a bobbin hanger arranged along a row of spindles of the spinning frame is reduced and this small bobbin is exchanged with a full bobbin suspended from a spare bobbin hanger supported on a spare rail arranged above and before a front bobbin hanger of a creel of the spinning frame.
  • the roving-piecing operation is a part of the roving exchange operation in a broad sense, which comprises the operation of exchanging the small bobbin with the full bobbin, the operation of piecing the roving of the full bobbin with the roving of the small bobbin from which the roving is withdrawn, and the related operation of hanging the roving of the full bobbin on a roving guide.
  • the roving exchanger 50 is arranged on both sides of the machine stand of the spinning frame and movable along a row of spindles of the spinning frame.
  • creel pillars 4 of a spinning creel are vertically arranged at appropriate intervals in the longitudinal direction of the machine stand 3 in the central portion of the machine stand 3 of the spinning frame.
  • bobbin hangers l9 and 20 are supported on two front and rear rails ll and l2 supported on the creel pillars 4 by a supporting bracket l8, a supporting bracket l3, and a hanging lever l4.
  • a small bobbin lc and a medium bobbin lb are suspended from the bobbin hangers l9 and 20.
  • the bobbin hangers l9 and 20 are arranged so that they confront each other at every two pitches of the draft zone 5, that is, at every two spindles, as indicated by the positions of the small bobbin lc and medium bobbin lb in Fig. 4.
  • the bobbin hanger l9 of the front rail ll will be called the front bobbin hanger l9
  • the bobbin hanger 20 of the rear rail l2 will be called the rear bobbin hanger 20.
  • a substantially annular roving guide 2 is supported on the creel pillar 4 below the intermediate portion between the front and rear bobbin hangers l9 and 20 by using a supporting lever 9.
  • the roving guide 2 is formed to have an annular shape having an opening 2c and an inwardly projecting ridge 2a on the side confronting the opening 2c, as shown in Fig. 20-(A), and upright nails 2b are formed on both sides adjacent to the opening 2c, as shown in Fig. 20-(B).
  • the nails 2b may be inwardly projected.
  • the ridge 2a serves to separate rovings fed from the front bobbin lc and rear bobbin lb, and the nails 2b serve to hang the roving of the full bobbin on the roving guide after the roving-piecing operation.
  • a spare rail l5 attached to the top end portion of the supporting bracket l3 is laid out along the longitudinal direction of the machine stand before and above the front bobbin hanger l9.
  • the spare rail l5 is formed in a hollow columnar shape having a -shape section in which the lower side is open, and a bobbin carriage l7 is inserted into the spare rail l5 from this opening so that the bobbin carriage l7 can go in and out and can move along the spare rail l5.
  • the bobbin carriage l7 has a spare hanger 24, and as shown in Fig. 3, the full bobbin la is suspended from this bobbin hanger 24, and after the roving exchange operation in a broad sense, described hereinafter, the small bobbin lc can be suspended from the bobbin hanger 24.
  • the roving exchange operation including the roving-piecing operation is carried out between the small bobbin lc of the front bobbin hanger l9 and the full bobbin la of the spare bobbin hanger l5, as shown in Fig. 3.
  • the roving R of the full bobbin la of the front bobbin hanger l9 is fed to a back roller 5a of the draft zone 5 through the roving guide 2 and trumpet 6 and is twisted into a yarn by a spindle 25.
  • Reference numeral 7 represents a supporting rod for a top arm (not shown) for supporting a plurality of top rollers of the draft zone 5.
  • the roving on the full bobbin 1a of the front bobbin hanger 19 is consumed and the full bobbin is changed to a medium bobbin, while the roving on the medium bobbin 1b of the rear bobbin hanger 20 is consumed and the medium bobbin is changed to a small bobbin.
  • the front bobbin hanger 19 and rear bobbin hanger 20 are exchanged with each other in the state where the medium bobbin and small bobbin are kept hung therefrom, and as a result, the bobbin arrangement shown in Fig. 3 is produced and, the roving exchange operation including the roving-piecing operation is conducted again.
  • the roving exchange is accomplished by dismounting the bobbin hangers 19 and 20 from the rails 11 and 12 and turning them by 180°.
  • This construction is disclosed in detail in Japanese Examined Patent Publication No. 60-14848 granted to the applicant of the instant application equivalent to EP-A-124,662, but since the present invention is not limited to any particular roving exchange method, detailed explanation is omitted.
  • Supply of the full bobbin to the spare bobbin hanger 24 is accomplished by fitting the full bobbin to the carriage bar 17 at the position in the roving frame and moving the full bobbin together with the carriage bar 17 to a predetermined position on the spare rail 15.
  • the roving exchanger 50 can be moved along the front face of the machine stand of the spinning frame, that is, along the row of the spindles 25.
  • a body 51 of the roving exchanger 50 there are arranged wheels 51a, guide rollers 29 on the side faces of the body 51 confronting the spinning frame, a running motor 21 in the body 21, and a scroll cam 22 co-operating with the running motor 21.
  • a guide rail 28 is attached to a spindle rail 26 of the spinning frame through an attachment bracket 27, and many guide pins 30 are planted on the outer surface of the guide rail 28 at the same intervals as the pitch intervals of the front bobbin hanger l9.
  • the guide roller 29 is rotatable on the guide rail 28, and therefore, by rotating the scroll cam 22 in the state where a guide pin 30 is engaged with the scroll cam 22, the roving exchanger 50 can be moved along the row of spindles of the spinning frame and can be stopped at a predetermined position.
  • the roving exchanger 50 comprises mechanisms for performing roving piecing and roving exchange in a predetermined order and mechanisms for driving these mechanisms. More specifically, in the roving exchanger 50 shown in Fig.
  • the full bobbin exchange head 52 is first described.
  • Six full bobbin exchange pegs 53 are rotatably arranged on a change bar 71 of the full bobbin exchange head 52 (see Fig. 11).
  • the pegs 53 should be moved vertically and also moved forward and backward for moving the full bobbins 1a at the positions shown in Fig. 3 to the positions of the small bobbins 1c by using the pegs 53.
  • the change bar 71 on which the six pegs 53 are arranged is disposed above the lift body 37 of the full bobbin exchange head lift mechanism 31 shown in Fig. 1 through a link mechanism comprising an inner link 75 and an outer link 76 as the main parts.
  • Two chains 36a and 36b parallel to each other in the vertical direction are connected to the lift body 37, and the lift body 37 is moved vertically by vertically moving the chains 36a and 36b by the motor 32 for the full bobbin exchange head lift mechanism arranged in the roving exchanger 50. More specifically, a chain wheel 33a is attached to a shaft 33 of the motor 32 and the rotation of the chain wheel 33a is transmitted to a shaft 34 rotatably supported on the body 51 of the roving exchanger 50 through a chain 33b and a chain wheel 34a.
  • Chain wheels 35a and 35b are attached to both ends of the shaft 34, and one ends of the chains 36a and 36b hung on the chain wheels 35a and 35b are directly connected to the lower portion of the lift body 37 while the other ends of the chains 36a and 36b are connected to the upper portion of the lift body 37 through chain wheels 39a and 39b rotatably arranged in the upper portion of the body 51. Accordingly, the vertical movement of the lift body 37 is attained by the rotation of the shaft 34. Since the lift body 37 is slidably fitted in guide members 38a and 38b arranged vertically on the body 51, accurate movement of the lift body 37 in the vertical direction is assured and maintained.
  • the forward and backward movement of the full bobbin exchange head 52 is performed by a forward and backward movement mechanism for the full bobbin exchange head shown in Fig. 5.
  • a housing 77 is arranged above the lift body 37, and the rotation of a motor 86 within the housing 77 swings an arm 82 through a reduction gear 85 and gears 84 and 83, and this swinging movement is transmitted to a swinging arm 80 through a swinging pin 81 mounted on the top end of the arm 82 and a long hole 80a of a swinging arm 80, with which the sliding pin 81 is engaged.
  • the lower end of the outer link 76 and the swinging arm 80 are secured to a pin 79 pivoted on the housing 77.
  • a drive gear 84 in the direction of the arrow results in the swinging movement of the swinging arm 80 and outer link 76 in the direction of the arrow.
  • One end of a change bar supporting member 72 is connected to the top end of the outer link 76 through a pivot pin 74, and the change bar 71 is secured to the other end of the supporting member 72.
  • a pivot pin 73 is arranged in the intermediate portion of the change bar supporting member 72, and the top end of the inner link 75 is connected to the change bar supporting member 72 through this pivot pin 73.
  • the lower end of the inner link 75 is connected to the housing 77 through a pivot pin 78.
  • the pegs 53 on the change bar 71 are moved forward and backward to and from the spinning frame while maintaining the vertical posture, and they can be moved to the position just below the spare bobbin hanger 24 and to the position just below the front bobbin hanger 19.
  • alternate pegs 53 are independently rotated by 180° to the other pegs 53. This is because the ends of the rovings on full bobbins are smoothly taken out in the present embodiment, as described below.
  • the phase of the position of the presser of the flyer in the front row is different by 180° from the phase of the position of the presser of the flyer in the rear row, and the ends of rovings on full bobbins in the front row are arranged on the opposite side to the ends of rovings on full bobbins in the rear row, that is, apart by 180° from the ends of rovings in the rear row.
  • full bobbins of the front and rear rows doffed in the roving frame are alternately picked up and arranged in a line, and if full bobbins arranged in one line are suspended from the spare rail 15 by using the bobbin carriage 17, as shown in Fig. 10-(A), the ends lae of the rovings 1a of these full bobbins are located at positions opposite by 180° to each other. More specifically, in Fig.
  • the roving ends lae of the six full bobbins are arranged to confront the end take-out nozzles 62, and then the six full bobbins are rotated in the rewinding direction. Note, if the space between two adjacent full bobbins is large, the full bobbins may be simultaneously rotated in the rewinding direction directly without once rotating them in the winding direction. In order to rotate the six full bobbins in the above-mentioned alternate manner, as shown in Figs.
  • the respective pegs 53 are rotatably supported on the change bar 71, and three pegs 53a, 53c, and 53e of these pegs 53 are made rotatable by a belt 163 through pulleys 162a, 162c, and 162e disposed below the pegs 53a, 53c, and 53e, while the other three pegs 53b, 53d, and 53f are similarly made rotatable by a belt 164 through pulleys 162b, 162d, and 162f.
  • Motors 57 and 54 are attached to the change bar 71 to drive the belts 163 and 164 through drive pulleys 57a and 54a.
  • reference numerals 161a through 161i represent guide pulleys for guiding the belts 163 and 164.
  • the motor 54 is rotated counterclockwise in Fig. 11, and for rotating all the full bobbins 1a in the rewinding direction (counterclockwise), the motors 54 and 57 are simultaneously rotated clockwise in Fig. 11.
  • the pegs 53 for the full bobbins are rotatably supported on a supporting shaft l66 by bearings attached to the change bar 71, and a fitting portion 166a that can be fitted in a lower hole of the bobbin is formed on the top end of the supporting shaft 166 and a cylindrical bobbin receiver 167 having a flange-like receiving part 167a is vertically movably fitted in the intermediate portion of the supporting shaft 166.
  • the bobbin receiver 167 is urged upward by a spring 167 interposed between the bobbin receiver 167 and a spring receiving plate 168 attached to the base of the supporting shaft 166 to abut against the fitting portion 166a.
  • the receiving part 167a of the bobbin receiver 167 is formed to have a diameter larger than the diameter of the lower hole of the bobbin, so that the bobbin can be supported.
  • the periphery of the cylindrical portion of the bobbin receiver 167 is formed to have an outer diameter equal to or smaller than the diameter of the fitting portion 166a, so that the cylindrical portion of the bobbin receiver 167 can be fitted in the lower hole of the bobbin.
  • the small bobbin exchange head 55 will now be described. Note the small bobbin exchange head 55 should be constructed so that the head 55 can be moved in the vertical direction and forward and backward with respect to the spinning frame.
  • the mechanism for this movement is substantially the same as the movement mechanism for the full bobbin exchange head.
  • small bobbin exchange head lift mechanisms 41a and 41b are arranged on both sides of the full bobbin exchange head lift mechanism 31 to impart vertical movements to three small bobbin pegs 56, respectively.
  • Two chains 46a and 46b and two chains 46c and 46d extending vertically in parallel to each other are connected to lift bodies 47a and 47b of the lift mechanisms 41a and 41b, respectively.
  • the forward-backward movement of the small bobbin exchange head 55 is performed by a mechanism similar to the forward-backward movement mechanism for the full bobbin exchange head 52 described hereinbefore with reference to Fig. 5, so that the pegs 56 can be moved between the stand-by position shown in Fig. 3 and the position just below the spare bobbin hanger 24 or the position just below the front bobbin hanger 19.
  • the structure of the pegs 56 in the small bobbin exchange head 55 is the same as the structure of the pegs 53 for full bobbins shown in Fig. 13.
  • the mechanism for rotating the respective pegs 56 is quite similar to the mechanism for rotating the full bobbin pegs 53, shown in Figs. 11 and 12. It is sufficient if the three pegs 56 of the small bobbin exchange head 55 are always rotated in the same direction. Accordingly, it is sufficient if one belt for driving the pegs 56 and one motor for the belt are arranged for each of the left and right small bobbin exchange heads 55.
  • Cam followers 94 corresponding to the cams 66, 67, and 68 and cam levers 95 for indicating the cam followers 94 are arranged.
  • One end of the cam levers 95 are pivoted on the body 51 of the roving exchanger 50 through pins 96, and operating rods 97, 98, and 99 are rotatably connected to the other ends of the cam levers 95.
  • FIG. 6 only one cam follower 94 and one cam lever 95 are shown, but cam followers and cam levers are disposed for the operating cams 66, 67, and 68, respectively, so that the roving-piecing head operating rod 97, the end take-out nozzle operating rod 98, and the roving hanging plate operating rod 99 can be elongated upward or downward.
  • the rotation of a pair of left and right cam shafts 93 can be accomplished by transmitted the rotation of a motor 87 arranged within the body 51 of the roving exchanger 50 to a chain wheel 90 through a reduction gear 88, a chain wheel 89, and a chain 91 and transmitting the rotation of the chain wheel 90 to the left and right cam shafts 93 through a long intermediate shaft 90a and engaged gears 92a, 92b, and 92c (the gears on the right side are omitted in Fig. 1).
  • the end take-out nozzle 62 and the end take-out nozzle operating mechanism will now be described with reference to Fig. 7.
  • a pair of left and right end take-out nozzle operating mechanisms are arranged symmetrically with each other. In Fig. 1, only the right mechanism is shown and the left mechanism is omitted.
  • the end take-out nozzle 62 is fixedly connected to an end take-out nozzle supporting pipe 139 through a nozzle attachment bracket 138 arranged on the lower end of the nozzle 62, and the roving end of the full bobbin la is taken out from the top end of the end take-out nozzle 62 by sucking air currents reaching both ends of the end take-out nozzle supporting pipe 139 from a blower 23 through a hose 23a.
  • the top end of the end take-out nozzle 62 is moved along a locus 140 shown in Fig. 7 so that the roving taken out is guided to the roving-piecing head 60.
  • a parallel guide 132 having two linear rods 133 is arranged on the body 51 of the roving exchanger 50, and a long hole 129 is formed in an upper portion 128a of a slider 128 and a slide pin 131 mounted on the top end of the lift arm 127 is slidably fitted in this long hole 129, so that if the lift arm 127 is swung in the direction of the arrow, the slider 128 is vertically moved along the parallel guide 132.
  • the right end of the lower portion 128b of the slider 128 rotatably supports one end of the end take-out nozzle supporting pipe 139.
  • a guide plate 134 having a curved guide hole 135 defining the locus of the top end of the end take-out nozzle 62 is arranged on the body 51 of the roving exchanger 50, and a slide pin 136 engaged with the curved guide hole 135 is mounted on one end of a connecting arm 137 and the other end of the connecting arm 137 is integrally connected to the end take-out nozzle supporting pipe 139. Accordingly, when the slider 128 rises, the end take-out nozzle 62 itself rises, and simultaneously, the slide pin 136 is guided along the curved guide hole 135 to rotate the end take-out nozzle 62, with the pipe 139 as the center, and move the top end of the end take-out nozzle 62 along the locus 140.
  • a comb effective for cutting the roving is formed in the interior of the top end of the end take-out nozzle 62, as disclosed in Japanese Examined Patent Publication No. 57-51649.
  • the roving-piecing head 60 and the roving-piecing head operating mechanism will now be described with reference to Fig. 8.
  • a pair of left and right roving-piecing head operating mechanisms are disposed.
  • the roving-piecing head 60 is a device for piling the roving end taken out from the full bobbin by the end take-out nozzle 62 on the roving of the small bobbin while spinning and cutting the roving of the small bobbin.
  • the roving exchanger 50 shown in Fig. l six roving-piecing heads 60 corresponding to the above-mentioned end take-out nozzles 62 are arranged on a roving-piecing head supporting bar 148 (see Fig. 17).
  • the roving-piecing head 60 When the end take-out nozzle 62 sucks the roving end, as shown in Fig. 8, the roving-piecing head 60 is faced downward in the vertical direction from the roving-piecing head supporting bar 148 to avoid interference by the end take-out nozzle 62. To hold the roving end and pile the roving end on the roving of the small bobbin during spinning, the roving-piecing head 60 should be turned counterclockwise or moved to the right in Fig. 8.
  • the roving-piecing head operating mechanism for imparting such a movement to the roving-piecing head 60 is a mechanism for transmitting the downward movement of the roving-piecing head operating rod 97 by the roving-piecing cam 66 of the operating mechanism 65 shown in Fig. 6 to an inner link l46 and an outer link 147, with a time difference, through a swinging arm 141 and turning them clockwise.
  • the inner link 146 and outer link 147 are rotatably supported on the body 51 of the roving exchanger 50 through a pivoting shaft 145, and the inner link 146 and outer link 147 are stretched in the counterclockwise direction by stretching springs 152 and 153, and the inner link 146 is received by a stopper 51h.
  • the pivoting shaft 145 is supported rotatably and slightly movably in the longitudinal direction (in the left-right direction in Fig. 1) by a pair of left and right supporting members 51e secured to the body 51, and the lower end of the inner link 146 is freely fitted on the pivoting shaft 145, and the lower end of the outer link 147 is secured to the pivoting shaft 145.
  • a sector gear 144 is secured to the end portion of the pivoting shaft 145 and this sector gear 144 is engaged with a gear 141a integrated with the swinging arm 141.
  • a pin 151 is mounted on the upper end of the outer link 147 and is engaged with a long hole 150a of a connecting link 150.
  • the top end of the inner link 146 rotatably supports a pin 149 planted integrally on the end face of a roving-piecing head supporting bar 148, and the upper end of the connecting link 150 is secured to the pin 149, so that the roving-piecing head supporting bar 148 can be turned, with the pin 149 as the center, by the swinging movement of the connecting link 150.
  • the swinging arm 141 is turned counterclockwise, with the pin 143 as the center, and the outer link 147 is swung clockwise against the stretching force of the spring 153 through the sector gear 144 and pivoting shaft 145 to press the pin 151 on the top end of the outer link 147 to the right and turn the connecting pin 150 counterclockwise, with the pin 149 as the center.
  • the roving-piecing head supporting bar 148 is turned counterclockwise together with the roving-piecing head 60. This turning movement continues from the position of the connecting link 150 shown in Fig.
  • the roving-piecing head 60 is substantially at the horizontal posture.
  • the roving-piecing head operating rod 97 is moved downward and the outer link 147 is further turned clockwise, the pin 151 abuts against the lower end of the long hole 150a, and then the pin 149 is drawn to the right by the connecting link 150 and the inner link 146 is turned with the shaft 145 as the center. Accordingly, the roving-piecing head 60 disposed in the horizontal direction is advanced to the roving R from the small bobbin 1c during spinning along the locus 154.
  • the arrangement position of the full bobbin is deviated from the position of the draft zone 5 by 1/2 spindle pitch, as shown in Fig. 4. Therefore, when the end of the roving of the full bobbin is taken out and this roving is held on the roving-piecing head 60 and moved to the draft zone 5, the roving-piecing head 60 should be laterally moved by 1/2 spindle pitch toward the draft zone 5 in which the roving of the small bobbin is introduced.
  • a roving-piecing head lateral movement mechanism 61 is disposed to move the pivoting shaft 145.
  • This roving-piecing head lateral movement mechanism 61 has a reduction gear-provided motor 217 secured to the body 51, a worm 218 to be rotated by this motor 217, and an arm 155 having a worm wheel to be engaged with the worm 218 and being swung with a pin 155a as the center.
  • the rod 145 is moved selectively to the right or the left in Fig. 1.
  • FIG. 14 is a plan view showing an example of the roving-piecing head
  • Fig. 15 is a side view thereof.
  • the roving-piecing head 60 shown in Figs. 14 and 15 comprises a roving-piecing head body 171 having a roving guide groove 173 formed on the top end portion thereof and a roving holding lever 174 capable of reciprocating across the roving guide groove 173 in the plane parallel to the upper surface of the body 171.
  • the body 171 is secured to a roving-piecing head supporting bar 148 having a ⁇ -shaped section.
  • the roving holding lever 174 is rotatably supported near the center thereof by a pivot pin 178 secured to the body 171.
  • a roving holding lever operating bar 182 is slidably arranged on the roving-piecing head supporting bar 148, and an operating member 181 having on the top end thereof an opening for containing a pin 179 therein is secured to the operating lever 182.
  • Nip pieces 176 and 177 having roving holding faces 176a and 177a confronting both roving holding side faces 175a and 175b of a roving holding portion 175 on the top end of the roving holding lever 174 are secured to the upper surface of the body 171 on both sides of the roving guide grooves 173.
  • a triangular roving guide opening 172 is formed on the top end of the body 171 to guide the roving to the roving guide groove 173, and the opening of a nozzle 183 for jetting air fed through a conduit 184 to the inner portion of the roving guide groove 173 downward is formed on one side face of the roving guide opening 172.
  • FIG 14-(A) shows the position of the roving holding lever 174 where the operating lever 182 is moved to the right and the roving (not shown) of the small bobbin is held between the roving holding face 175a of the roving holding lever 174 and the roving holding face 177a of the nip piece 177, and the position of the roving holding lever 174 in the stand-by state for guiding the roving of the full bobbin to the roving guide groove 173.
  • the roving-piecing head 60 is located at the vertical posture described hereinbefore with reference to Fig. 8, the roving extending between the full bobbin 1c and the end take-out nozzle 62 is guided into the roving guide groove 173 through the roving guide opening 172, and if the roving holding lever 174 turns the roving holding portion 174 to the right as shown in Fig. 14-(C), the roving is held by the roving holding lever 174 and the nip piece 176.
  • the roving-piecing head 60 is moved from the vertical position to the horizontal position, the roving extending from the end take-out nozzle 62 is cut in a brush tip-like shape downstream of the holding point of the roving holding lever 174.
  • the brush tip-like roving end to be piled on the roving of the small bobbin during spinning is formed in the roving guide groove 173. If this movement from the vertical position to the horizontal position is repeated, single filaments entangled at the end of the roving are removed and the brush tip-like shape becomes uniform.
  • the roving-piecing head 60 is brought close to the roving R of the small bobbin during spinning along the locus indicated by a solid line 154 in Fig. 8 and simultaneously, the roving-piecing head 60 is laterally moved to the right or the left in Fig. 1 by 1/2 spindle pitch by the roving-piecing head lateral movement mechanism 61, whereby the roving R of the small bobbin during spinning is guided into the roving guide groove 173 and the end of the roving of the full bobbin is piled on the roving R of the small bobbin. Then, as shown in Fig.
  • the roving holding portion 175 of the roving holding lever 174 is turned to the left and moved to the neutral position, whereby the end of the roving of the full bobbin is introduced into the trumpet 6 in the state piled on the roving R of the small bobbin while being guided by the roving R. Then, at the point when the roving end of the full bobbin is guided into the back roller 5a of the draft zone 5, as shown in Fig.
  • the roving holding portion 175 is turned to the left to the utmost, and the roving R of the small bobbin is held between the left holding face 175a of the roving holding portion 175 of the roving holding lever 174 and the holding face 177a of the left nip piece 177. Since the roving on the downstream side of the roving-piecing head is inserted toward the draft zone 5, the pieced portion of the roving is travelled downward and since the roving R located upstream of the pieced portion is held by the roving holding lever 174 and the left nip piece 177, the roving R is pulled and cut to complete the roving-piecing operation. Then, the roving holding lever 174 is turned to the neutral position and the roving R is released from holding.
  • FIG. l9 The sliding movement of an operating bar l82 for the turning movement of the roving holding lever l74 will now be described with reference to Fig. l9.
  • operating members l82 for six roving-piecing heads 60 are secured to the operating bar l82 contained in the roving-piecing head supporting bar l48.
  • Plungers of four operating bar sliding solenoids l85 secured to the roving-piecing head supporting bar l48 are connected to the operating bar l82 through L-shaped members l88, pins 200 and holes l86.
  • the shapes of the holes l86 with which the pins 200 are engaged are such that the holes l86a and l86b corresponding to the solenoids l85a and l85d are long holes elongated in the direction of the movement of the operating bar l82, and the holes l86b and l86c corresponding to the solenoids l85b and l85c are long holes elongated in the direction orthogonal to the direction of the movement of the operating bar l82. As shown in Fig.
  • the solenoid l85d is energized to move the pin 200d in the direction indicated by arrow D, whereby the operating bar l82 is moved in the direction indicated by arrow X2.
  • the solenoid l85a is energized to keep the plunger l89 of the solenoid l85a in the attracted and sunk state. Accordingly, the pin 200a abuts to the right end of the long hole l86a and the operating bar l82 is set at the neutral position.
  • the solenoid l85b is energized to draw back the plunger l89, whereby the pin 200b is moved in the direction indicated by arrow B and the operating bar l82 is moved in the direction indicated by arrow X3.
  • the reciprocative turning movement of the roving holding lever l74 in the roving-piecing head 60 is attained according to a predetermined plan.
  • FIG. l6 Another example of the roving-piecing head 60 is shown in Fig. l6. As is seen from the side view of Fig. l6-(B), this roving-piecing head 60a is different from the roving-piecing head 60 shown in Fig. l5 in that a lever l74a for the roving of the full bobbin and a lever l74b for the roving R being withdrawn from the small bobbin are used as the roving holding lever.
  • an operating bar l82a for the roving of the full bobbin and an operating bar l82b for the roving R are disposed as the operating bar, and the roving R is cut upstream of the portion to be piled and the end of the roving of the full bobbin is piled on the roving R of the small bobbin, and the roving-piecing operation is performed in the same manner as in the case of the roving-piecing head 60 shown in Figs. l4 and l5.
  • FIG. l7 and l8 Still another example of the roving-piecing head 60 is shown in Figs. l7 and l8.
  • This roving-piecing head 60b is characterized in that a roving guide member 20l is arranged below the body l7l.
  • a Y-shaped roving guide groove 203 that can communicate with the roving guide groove l73 of the body l7l is formed on the top end portion of the roving guide member 20l, and the rear end portion of the roving guide member 20l is swingably pivoted on a projection l7la of the body l7l through a pivoting pin 205.
  • a compression spring 206 is arranged between the portion 20la of the roving guide member 20l in the rear of the pivoting pin 205 and the roving-piecing head supporting bar l48 to urge the roving guide member 20l and cause it to abut against the body l7l.
  • a cam plate 204 is secured to the side portion of the roving guide member 20l on the side of the guide groove 203.
  • the protruding end of the roving is contained in the roving guide groove 203 and the roving end of the full bobbin is piled on the roving R of the small bobbin.
  • the protruding roving end of the full bobbin protrudes below the roving guide groove, the protruding roving end is bent or curved by abutment against the trumpet 6 and is not inserted or is inserted in the state where filaments of the roving are bent or curved, and yarn breakage often occurs.
  • the roving end of the full bobbin is contained in the roving guide groove and is piled on the roving of the small bobbin in this state, the roving-piecing operation can be assured.
  • the roving of the small bobbin during spinning is cut by holding the roving between the roving holding lever l74 and the nip piece l77 and pulling and cutting the roving by the back roller 5a.
  • the reciprocating movement of the roving holding lever l74 across the roving guide groove l73 may be accomplished by parallel movement caused by fixing the roving holding lever l74 to the operating bar l82.
  • roving holding levers l74 of a plurality of roving-piecing heads 60 are operated by one operating bar l82, in each roving-piecing head 60, in order to properly hold the roving, it is preferably a spring is interposed between the roving holding lever l74 and the operating bar l82.
  • the roving hanging plate operating mechanism will now be described with reference to Fig. 9.
  • a pair of left and right roving hanging plate operating mechanisms are symmetrically disposed.
  • the roving hanging plate 58 is a plate for hanging the roving of the full bobbin, in which piecing is completed, on the roving guide 2.
  • the roving hanging plate 58 should be moved along the locus 116 shown in Fig. 9.
  • the roving hanging plate 58 is formed as one plate extending in the longitudinal direction of the roving exchanger 50.
  • the downward movement of the roving hanging plate operating rod 95 by the roving hanging cam 68 of the operating mechanism 65 is converted to the movement of the roving hanging plate along an intended locus through the link mechanism comprising inner and outer links l0l and l02 in combination.
  • a sector gear l04 is pivoted on the body 5l through a pin l09, and by the downward movement of the roving hanging plate operating rod 95, the sector gear l04 is turned clockwise, with the pin l09 as the center, resulting in a counterclockwise turning of a sector gear l05.
  • This sector gear l05 is fixed to a shaft ll2 rotatably and slidably supported in the longitudinal direction by a supporting member l03 attached to the body 5l, and the top end of the inner link l0l is secured to the shaft ll2.
  • the lower end of the inner link l0l is rotatably pivoted on a pin ll4a planted in a connecting ring l07 and a pin ll5 planted in the rear end of a supporting bar l08.
  • a shaft ll7 is supported on the supporting member l03 rotatably and movably in the axial direction, and one end of the connecting link l06 is rotatably fixed to the shaft ll7 and the other end of the connecting link l06 is rotatably fixed to the shaft ll2, so that the movement of the shaft ll2 in the axial direction is transmitted to the shaft ll7.
  • the top end of the outer link l02 is fixed to the shaft ll7 and the lower end of the outer link l02 is connected to the connecting pin l07 through a pin ll3.
  • a small gear ll4 is wedged to the pin ll4a planted in the connecting link l07 and a small gear ll5 is wedged to the pin ll5a planted in the supporting lever l08, so that the small gears ll4 and ll5 are engaged with each other.
  • the roving hanging plate 58 is hung on and fixed to the top ends of both the supporting levers l08 (see Fig. l).
  • Six V-shaped guiding notches are arranged on the top end side of the roving hanging plate to regulate the position of the roving in the left-right direction when the roving of the full bobbin, in which piecing is completed, is guided to the roving guide 2, though these notches are not shown in the drawings.
  • both of the inner and outer links l0l and l02 are turned counterclockwise, and when the inner link l0l is brought close to the swinging end thereof, because of the relationship among the connecting lengths of the inner and outer links l0l and l02 and the connecting link l07, the connecting link l07 is turned counterclockwise with the pin ll4a as the fulcrum.
  • the connecting pin l07 By this counterclockwise turning of the connecting pin l07, the small gear ll5 engaged with the small gear ll4 is turned clockwise. Accordingly, the top end of the roving hanging plate 58 is moved along the locus ll6 shown in Fig.
  • the roving hanging plate 58 is inclined toward the machine stand above the roving guide 2 to guide the roving of the full bobbin into the roving guide 2.
  • the mechanism for the lateral movement of the roving hanging plate 58 will now be described.
  • the roving hanging plate 58 is moved, for example, by 20 mm, to hang the roving of the full bobbin on the nail 2b of the roving guide 2 shown in Fig. 20, and this movement is accomplished by the mechanism 59 for the lateral movement of the roving hanging plate shown in Fig. l.
  • the mechanism 59 for the lateral movement of the roving hanging plate comprises a reduction gear-provided motor ll7 secured to the body 5l, a worm ll8 rotated through a gear ll7a by the motor ll7 and an arm ll9 having on one end thereof a worm wheel engaged with the worm ll8, which is selectively swung to the right or the left in Fig. l, with a pin ll9a as the center, to laterally move a shaft of the roving hanging plate operating mechanism.
  • a reduction gear-provided motor ll7 secured to the body 5l a worm ll8 rotated through a gear ll7a by the motor ll7 and an arm ll9 having on one end thereof a worm wheel engaged with the worm ll8, which is selectively swung to the right or the left in Fig. l, with a pin ll9a as the center, to laterally move a shaft of the roving hanging plate operating mechanism.
  • various operating mechanisms are arranged in the roving exchanger.
  • movements of the end take-out nozzle, roving-piecing head, roving hanging plate, full bobbin exchange head, and small bobbin exchange head are performed in a predetermined order.
  • the motors of the above-mentioned various operating mechanisms are operated in a predetermined order based on instructions from a controller 300 arranged in the body 5l of the roving exchanger 50, whereby exchange between the full bobbin and the small bobbin is performed and the roving of the full bobbin is pieced with the roving of the small bobbin during spinning.
  • the construction and function of the controller are well-known. Accordingly, a detailed description of the controller is omitted.
  • the roving exchange operation in a broad sense, that is, roving exchange and roving piecing between the full bobbin and the small bobbin, which is performed by using the roving exchanger 50 having the above-mentioned structure will now be described.
  • the bobbin suspended from the front bobbin hanger l9 of the creel of the spinning frame becomes a small bobbin lc and the bobbin suspended from the rear bobbin hanger 20 becomes a medium bobbin lb
  • the guide roller 29 of the roving exchanger 50 is placed on the guide rail 28 and the roving exchanger 50 is brought close to the spinning frame.
  • the roving exchanger 50 is travelled along the front face of the spinning frame by driving the scroll cam 22 by the driving motor 2l, and is stopped at the position where six small bobbins lc are located at the set positions. At this position, a series of roving exchange and roving-piecing operations are carried out in sequence. These operations will now be described with reference to Fig. 2l.
  • the amount of the roving left on the small bobbin lc is small and roving exchange is necessary [Fig. 2l-(l)].
  • the full bobbin exchange head 52 located below the full bobbin la suspended from the bobbin hanger 24 of the spare rail l5 is elevated by the lift mechanism 3l, and the peg 53 of the full bobbin exchange head 52 is fitted with the lower portion of the full bobbin la and the full bobbin la is taken out from the bobbin hanger 24.
  • the full bobbin exchange head 52 having the full bobbin la placed thereon is brought down and returned to the original position shown in Fig. 2l-(l).
  • the end take-out nozzle 62 is elevated by the end take-out nozzle operating mechanism, and the end take-out nozzle 62 is stopped at the position where the sucking opening of the end take-out nozzle 62 is located at the position corresponding to the height of the roving end of the dropped full bobbin la [Fig. 2l-(3)].
  • the motor 54 of the peg rotating mechanism contained in the full bobbin exchange head 52 is rotated counterclockwise, when seen from above, and alternate full bobbins having the roving end on the side opposite to the end take-out nozzle 62 are rotated by l80° in the winding direction to move the roving ends of these full bobbins toward the end take-out nozzle 62.
  • the motors 54 and 57 are rotated clockwise to rotate the six full bobbins in the rewinding direction, and the sucking force of the blower 23 acts on the end take-out nozzle 62.
  • the suction opening of the end take-out nozzle 62 sucks the roving end of the corresponding full bobbin la to take out the roving end of the full bobbin la [Fig. 2l-(4)]. While the rotation of the full bobbin and suction by the end take-out nozzle 62 are continued, the end take-out nozzle 62 is brought down and returned to the original position, and the taken-out roving is inserted into the roving guide groove l73 of the roving-piecing head 60 [Fig. 2l-(5)].
  • the solenoid l85c of the roving-piecing head 60 is energized to actuate the roving holding lever l74 to hold the roving of the full bobbin between the roving holding portion l75 and the nip piece l76. Simultaneously, the roving-piecing head, which has been kept at the downwardly vertical posture, is set at the substantially horizontal posture by the roving-piecing head operating mechanism.
  • the roving of the full bobbin la is caught by the comb attached to the interior of the top end of the end take-out nozzle 62 and is cut between the holding point in the roving-piecing head 60 and the end take-out nozzle 62 to form a roving end [Fig. 2l-(6)].
  • the roving-piecing head 60 holding the roving of the full bobbin having the formed roving end is advanced toward the draft zone 5 of the spinning frame by the roving-piecing head operating mechanism.
  • the advance of the roving-piecing head 60 is once stopped and the roving-piecing head 60 is laterally moved by l/2 spindle pitch toward the trumpet 6 in which the roving of the small bobbin is guided (to the right in Fig. 4) by the roving-piecing head lateral movement mechanism 6l and set at a position in the longitudinal direction of the spinning frame, which corresponds to the trumpet 6 located upstream of the draft zone 5 of the spinning frame. Then, the advance is conducted and the roving end of the full bobbin reaches above the trumpet 6. Where the roving-piecing head 60b is used, the state shown in Fig. l8 is brought about.
  • the roving of the small bobbin during spinning is introduced into the roving guide groove l73 of the roving-piecing head 60 and is piled on the roving of the full bobbin.
  • the full bobbin is rotated counterclockwise by the peg rotation mechanism of the full bobbin exchange head 52 to unwind the roving and prevent breakage of the roving by the advance of the roving-piecing head 69.
  • the roving hanging plate 58 is slightly elevated by the roving hanging plate operating mechanism.
  • the solenoids l85a and l86b of the roving-piecing head 60 are energized and the roving holding lever l74 is turned to the neutral position to release the holding of the roving of the full bobbin, and the released roving of the full bobbin la is guided by the roving of the small bobbin during spinning and inserted into the trumpet 6 together with the roving of the small bobbin.
  • the solenoid l85b of the roving-piecing head 60 is energized, the roving holding lever l74 is further turned and the roving of the small bobbin is held between the roving holding portion l75 and the nip piece l77. Since the roving of the small bobbin is held by the roving-piecing head 60, the roving is drafted and cut between the roving-piecing head 60 and the back roller 5a [Fig. 2l-(7)].
  • the full bobbin la in which roving piecing has been completed is elevated again close to the spare bobbin hanger 24 by the full bobbin exchange head 52 to an extent such that the full bobbin la is not attached to the spare bobbin hanger 24, and is then stopped.
  • the full bobbin la is rotated counterclockwise by the peg rotation mechanism of the full bobbin exchange head 52 to unwind the roving and prevent breakage of the roving by the raising of the full bobbin la.
  • the roving hanging plate 58 is elevated again to the point near the roving guide 2 to hold the slack in the unwound roving of the full bobbin la.
  • the solenoids l85a and l85d of the roving-piecing head 60 are energized to move the roving holding lever l74 to the neutral position, whereby the roving of the small bobbin is released from holding by the roving holding lever l74, and simultaneously, the roving-piecing head is retreated and stopped at the position where the roving of the full bobbin la is taken out from the roving-piecing head 60 [Fig. 2l-(8)].
  • the small bobbin exchange head 55 is advanced to the position just below the small bobbin of the front row of the creel by the forward-backward movement mechanism and lift mechanism, and the small bobbin exchange head 55 is elevated to take out the small bobbin lc from the front bobbin hanger l9 [Fig. 2l-(9)].
  • the small bobbin exchange head 55 having the small bobbin placed thereon is dropped [Fig. 2l-(l0] and is retreated and returned to the original position [Fig. 2l-(ll)].
  • the small bobbin is rotated clockwise, seen from above, by the peg rotation mechanism contained in the small bobbin exchange head to wind the cut roving.
  • the full bobbin exchange head 52 When the small bobbin exchange head 55 is returned to the original position, the full bobbin exchange head 52 is dropped and returned to the original position. At this point, the full bobbin la is rotated clockwise in an appropriate quantity by the peg rotation mechanism of the full bobbin exchange head 52 to wind the roving and maintain appropriate slack in the roving produced by dropping the full bobbin exchange head 52.
  • the roving hanging plate 56 is fully elevated, the roving hanging plate 58 is laterally moved by the roving hanging plate lateral movement mechanism 59 to hang the roving of the full bobbin la on the roving guide 2 arranged in the spinning frame. Simultaneously, the roving-piecing head 60 is retreated and returned to the original position.
  • the retreat of the roving-piecing head 60 is stopped, and the roving-piecing head 60 is laterally moved and returned to the position corresponding to the bobbin on the creel with respect to the longitudinal direction of the spinning frame [Fig. 2l-(l2)].
  • the roving-piecing head 60 which has completed the retreat is returned to the vertical state from the horizontal state [Fig. 2l-(l3)].
  • the full bobbin exchange head 52 is advanced to the position just below the front bobbin hanger l9 and is elevated to attach the full bobbin la to the bobbin hanger l9.
  • the full bobbin la is rotated clockwise in an appropriate quantity by the peg rotation mechanism of the full bobbin exchange head 52 to maintain the appropriate slack in the roving produced by advance and retreat of the full bobbin exchange head 52.
  • the small bobbin exchange head 55 is advanced to the point just below the spare bobbin hanger 24 of the spare rail l5 and is elevated to attach the small bobbin to the bobbin hanger 24.
  • the roving hanging plate 58 is dropped, laterally moved to a midway point and returned to the original position [Fig. 2l-(l4)].
  • the small bobbin exchange head 55 is dropped, retreated, and returned to the original position [Fig. 2l-(l5)].
  • the roving exchange 50 is laterally moved by a distance corresponding to six bobbins of the front bobbin hanger l9, and is then stopped.
  • the roving exchange operation is repeated from one end of the spinning frame to the other end.
  • the roving exchange and roving-piecing operations may be also performed according to the following procedures by the roving exchanger 50.
  • the full bobbin exchange head 52 is elevated to attach the full bobbin la to the peg 53 [Fig. 2l-(2)] and the small bobbin exchange head 55 is advanced and elevated to take out the small bobbin lc from the front bobbin hanger and then returned to the original position.
  • the roving of the small bobbin lc is spun out.
  • the full bobbin exchange head 52 is brought down, and after the roving end is taken out from the full bobbin la, as described hereinbefore, the roving end is held by the roving-piecing head 60 and is guided above the trumpet to effect roving piecing.
  • the full bobbin la is suspended on the front bobbin hanger l9, and after the roving suspended from the roving guide 2 is wound, the small bobbin lc is suspended on the spare bobbin hanger 24 of the spare rail.
  • the small bobbin lc should be rotated counterclockwise to produce an appropriate amount of slack so that the spun roving between the small bobbin lc and the roving guide 2 does not interfere with the full bobbin la located in the front of the small bobbin lc, and the unwinding rotation of the small bobbin lc should be continued at a speed corresponding to the quantity of the roving until the roving-piecing operation is terminated.
  • the roving-piecing head 60 since the roving-piecing head 60 is arranged so that it confronts the center of the full bobbin la, midway in the advancing movement, the roving-piecing head 60 is laterally moved by l/2 spindle pitch to confront the trumpet 6. This lateral movement by l/2 spindle pitch is carried out in such a manner that, in one spinning frame, if the roving-piecing head 60 is first moved laterally to the left, at the time of subsequent roving exchange, the roving-piecing head 60 is moved laterally to the right.
  • the roving-piecing head 60 is guided to the position above the trumpet 6 on the side where the roving is spun out from the small bobbin lc. If the roving exchanger is designed so that the roving-piecing head 60 and the end take-out nozzle 62 can be laterally moved by one spindle pitch and the end of the roving of the full bobbin la can be taken out at the position corresponding to the trumpet 6, the lateral movement of the roving-piecing head 60 midway in the advancing movement need not to be performed.
  • the roving-piecing head 60 and end take-out nozzle 62 are moved to the position confronting the trumpet 6 to which the roving of the small bobbin lc is inserted. Furthermore, when the end take-out nozzle 62 is arranged at the position confronting the trumpet 6 and the roving-piecing head 60 is located so that it can be moved by one spindle pitch, the lateral movement of the roving-piecing head midway in the advancing movement and no lateral movement of the roving-piecing head 60 are effected alternately.
  • the roving of the small bobbin during spinning is cut by holding the roving between the roving holding lever 174 and the nip piece 177 and stretching and breaking the roving by the back roller 5a.
  • this modification does not deviate from the scope of the present invention.
  • the reciprocative movement of the roving holding lever across the roving guide groove 173 may be replaced by the parallel movement while securing the roving holding lever 174 to the operating bar 182.
  • a spring is interposed between the roving holding lever l74 and the operating bar l82.
  • roving-piecing can be accomplished by a simple operation in a short time during the operation of the spinning frame, and automation of the roving-piecing operation can be attained. Furthermore, by automatically performing the operation of hanging the roving of the full bobbin, in which roving piecing has been completed, on the roving guide, complete automation of roving-piecing and roving exchange can be attained. Moreover, if the roving-piecing head of the present invention is used for carrying out the above-mentioned roving-piecing method, roving-piecing can be assured.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Claims (7)

  1. Verfahren zum Verbinden von Vorgarn in einem Vorgarnaustauscharbeitsgang auf einer Spinnmaschine, wenn der aufgewickelte Durchmesser einer Vorgarnspule (1c), die an einer Hängespulenvorrichtung (19) aufgehängt ist und von welcher ein Vorgarn (R) abgezogen wird, klein wird, wobei das Ende eines Vorgarns oder eine drehbar gelagerte, gegen die kleine Spule auszuwechselnde volle Spule (1a) herausgenommen wird, das Ende des Vorgarns oberhalb eines Spinntrichters (6) gehalten und geführt wird und das Ende des Vorgarns auf das Vorgarn der kleinen Spule während des Spinnens abgelegt wird, das Ende des Vorgarns der vollen Spule freigegeben wird, und dann das Vorgarn der kleinen Spule abgeschnitten wird, um ein Vorgarnverbinden durchzuführen, dadurch gekennzeichnet, daß eine Saugöffnung einer Endentnahmedüse (62) in eine Stellung gegenüber eines Umfangs der vollen Spule (1a) bewegt wird, die volle Spule (1a) in die Umspulrichtung gedreht wird, das freie Ende des Vorgarns in die Saugöffnung der Endentnahmedüse (62) gesaugt wird, die Saugöffnung der Endentnahmedüse (62) in eine Stellung oberhalb eines Vorgarnverbindungskopfs (60) bewegt wird, um einen Teil des Vorgarns zwischen der vollen Spule (1a) und der Saugöffnung der bewegten Endentnahmedüse (62) herauszuziehen und den herausgezogenen Teil des Vorgarns zu einer Vorgarnführungsnut (173) des Vorgarnverbindungskopfs (60) zu führen, eine Vorgarnhalteeinrichtung (174) betätigt wird, um den geführten Teil des Vorgarns in der Vorgarnführungsnut (173) zu halten, den Vorgarnverbindungskopf (60) in eine obere Stellung weg von dem Spinntrichter zu bewegen, um ein von der kleinen Spule (1c) abgezogenes Vorgarn (R) in die Vorgarnführungsnut (173) des Vorgarnverbindungskopfs (60) zu legen und es mit dem Teil des Vorgarns der vollen Spule (1a) in der Vorgarnführungsnut (173) abzulegen, wobei die Halterung des Vorgarns der vollen Spule in dem Vorgarnverbindungskopf (60) freigegeben wird, sodaß das freie Ende des Vorgarns der vollen Spule (1a) in eine Streckzone (5) vorgeschoben werden kann, wobei sich das Vorgarn (R) der kleinen Spule (1c) vor dem Abschneiden des Vorgarns (T) der kleinen Spule (1c) in einer Stellung oberhalb des Spinntrichters (6) befindet, wodurch das freie Ende der vollen Spule (1a) automatisch mit dem Vorgarn (R) der kleinen Spule verbunden wird.
  2. Vorgarnverbindungsverfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Vorgarn (R) der kleinen Spule (1c) oberhalb des abgelegten Teils gehalten wird, um zu bewirken, daß das Vorgarn der kleinen Spule (1c) während des Spinnens bricht.
  3. Vorgarnverbindungsverfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das verbundene Vorgarn, das von der vollen Spule (1a) abgezogen ist, auf eine Vorgarnführung (2) gehängt wird.
  4. Vorgarnverbindungsverfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das von der vollen Spule abgezogene, verbundene Vorgarn oberhalb der Vorgarnführung (2) geführt wird und dann seitwärts bewegt wird, um das Vorgarn auf die Vorgarnführung (2) zu hängen.
  5. Vorgarnverbindungskopf (6) dadurch gekennzeichnet, daß er einen Körper (171) aufweist, der eine in dem oberen Endteil des Körpers ausgebildete Vorgarnführungsnut (173), einen auf dem Körper (171) angebrachten Vorgarnhaltehebel (174), welcher sich über die Führungsnut (173) hin- und herbewegen kann und Vorgarnhalteelemente (176,177) aufweist, die auf dem Körper (171) auf beiden Seiten der Führungsnut (173) angeordnet sind, um mit dem Vorgarnhaltehebel (174) zum Halten eines Vorgarns zusammenzuwirken.
  6. Vorgarnverbindungskopf nach Anspruch 5, dadurch gekennzeichnet, daß der Vorgarnverbindungskopf (60b) ein Vorgarnführungselement (201), welches eine Vorgarnführungsnut (173) des Körpers (171 und eine Nockenplatte aufweist, die schwenkend drehbar von dem Körper (171) sein kann, aufweist, und der Vorgarnverbindungskopf (60b) außerdem eine Feder (206) aufweist, die angeordnet ist, um zu bewirken, daß das Vorgarnführungsglied gegen den Körper (171) stößt.
  7. Vorgarnverbindungsverfahren nach einem der Ansprüche 1 bis 4, das mit einem Vorgarnverbindungskopf nach Anspruch 5 oder 6 durchgeführt wird.
EP19860306816 1985-09-04 1986-09-03 Verfahren und Vorrichtung zum Verbinden von Vorgarn in Spinnmaschinen Expired EP0213962B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP193919/85 1985-09-04
JP193920/85 1985-09-04
JP19391985A JP2502969B2 (ja) 1985-09-04 1985-09-04 精紡機における篠継方法
JP19392085A JPH0659979B2 (ja) 1985-09-04 1985-09-04 篠継ヘツド

Publications (3)

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EP0213962A2 EP0213962A2 (de) 1987-03-11
EP0213962A3 EP0213962A3 (en) 1987-11-04
EP0213962B1 true EP0213962B1 (de) 1991-09-04

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EP19860306816 Expired EP0213962B1 (de) 1985-09-04 1986-09-03 Verfahren und Vorrichtung zum Verbinden von Vorgarn in Spinnmaschinen

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EP (1) EP0213962B1 (de)
DE (1) DE3681233D1 (de)

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CS277008B6 (en) * 1987-06-24 1992-11-18 Schubert & Salzer Maschinen Apparatus for stable fiber sliver automatic feeding
IT1218670B (it) * 1987-08-10 1990-04-19 Gaudino Di P Gaudino E C Sas O Dispositivo per il cambio automatico delle cannelle in un filatoio per fibre tessili
DE3734275A1 (de) * 1987-10-09 1989-04-20 Zinser Textilmaschinen Gmbh Verfahren und vorrichtung zum einwechseln von vollen vorgarnspulen
DE3734264A1 (de) * 1987-10-09 1989-04-20 Zinser Textilmaschinen Gmbh Verfahren und vorrichtung zum automatischen wechseln von vorgarnspulen an einer ringspinnmaschine
IT1222899B (it) † 1987-10-13 1990-09-12 Marzoli & C Spa Impianto a struttura perfezionata per l'alimentazione di filatoi con spole cariche da sostituire a spole esaurite in modo casuale
IT1213855B (it) * 1987-12-02 1990-01-05 Gualchierani System Attrezzatura per il rifornimento di filatoi con materiale in bobine
JPH07122177B2 (ja) * 1987-12-10 1995-12-25 豊和工業株式会社 篠交換システムにおける精紡機の運転制御装置
IT1220877B (it) * 1988-04-27 1990-06-21 Enzo Scaglia Procedimento di trasporto bobine con stoppino pre posizionato
JP2584002B2 (ja) * 1988-09-21 1997-02-19 株式会社豊田自動織機製作所 紡機の自動スライバ継ぎ方法
DE3911764A1 (de) * 1989-04-11 1990-10-18 Zinser Textilmaschinen Gmbh Vorgarnspulenwechselwagen
DE3911765A1 (de) * 1989-04-11 1990-10-18 Zinser Textilmaschinen Gmbh Vorgarnspulenwechselwagen
DE69024444T2 (de) * 1989-09-28 1997-03-20 Rieter Ag Maschf Handhabung von Luntenspulen bzw. Lunten an einer Spinnmaschine
US5279105A (en) * 1990-01-31 1994-01-18 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Roving chip collecting system for roving bobbin replacing apparatus
KR930002007B1 (ko) * 1990-01-31 1993-03-20 가부시기가이샤 도요다지도우 쇽기세이사꾸쇼 조사(組絲) 교체기(交替機)의 집면(集綿)장치
US5343689A (en) * 1990-03-22 1994-09-06 Howa Machinery, Ltd. Method and apparatus for synchronously piecing roving for a continuous feeding thereof to a ring spinning frame
JP2784078B2 (ja) * 1990-03-22 1998-08-06 豊和工業株式会社 精紡機における一斉篠継方法と装置
DE4014732A1 (de) * 1990-05-08 1991-11-14 Rieter Ag Maschf Verfahren zum einbringen einer neuen lunte im anschluss an eine abgetrennte lunte bei ringspinnmaschinen und ringspinnmaschine zur ausfuehrung des verfahrens
DE4023626C2 (de) * 1990-07-25 1994-02-03 Zinser Textilmaschinen Gmbh Vorrichtung zum Übergeben eines Vorgarnanfangs einer neuen Vorgarnspule an ein Streckwerk einer Spinnmaschine
DE4024358A1 (de) * 1990-08-01 1992-02-13 Zinser Textilmaschinen Gmbh Verfahren und vorrichtung zum wechseln von wenigstens einer vollen vorgarnspule an einer spinnmaschine
WO1992007980A1 (de) * 1990-11-02 1992-05-14 Maschinenfabrik Rieter Ag Automatisierung der gatterbeschickung für spinn- bzw. zwirnmaschinen
CH683699A5 (de) * 1990-11-02 1994-04-29 Rieter Ag Maschf Verfahren und Einrichtung zur Handhabung von Vorgarnspulen an einer Feinspinnmaschine.
JPH04201946A (ja) * 1990-11-29 1992-07-22 Howa Mach Ltd 精紡機用クリール

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EP0213962A3 (en) 1987-11-04
EP0213962A2 (de) 1987-03-11
DE3681233D1 (de) 1991-10-10

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