US3834331A - Machine for automatic assembly of knitted articles - Google Patents

Machine for automatic assembly of knitted articles Download PDF

Info

Publication number
US3834331A
US3834331A US00404759A US40475973A US3834331A US 3834331 A US3834331 A US 3834331A US 00404759 A US00404759 A US 00404759A US 40475973 A US40475973 A US 40475973A US 3834331 A US3834331 A US 3834331A
Authority
US
United States
Prior art keywords
guideway
articles
disc
machine
set forth
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 - Lifetime
Application number
US00404759A
Other languages
English (en)
Inventor
J Raisin
A Bernardot
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.)
Institut Textile de France
Original Assignee
Institut Textile de France
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
Application filed by Institut Textile de France filed Critical Institut Textile de France
Application granted granted Critical
Publication of US3834331A publication Critical patent/US3834331A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B27/00—Work-feeding means
    • D05B27/10—Work-feeding means with rotary circular feed members
    • D05B27/18—Feed cups
    • D05B27/185—Guides or supports for the work presented to the feed cups, e.g. uncurling guides
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B65/00—Devices for severing the needle or lower thread
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
    • D05D2207/00—Use of special elements
    • D05D2207/02—Pneumatic or hydraulic devices
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
    • D05D2305/00—Operations on the work before or after sewing
    • D05D2305/02—Folding
    • D05D2305/04—Folding longitudinally to the sewing direction

Definitions

  • a machine for automatically assembling knitted articles has a guideway to direct the selvedges of articles towards a sewing machine where they will be connected.
  • a selvedge unrolling device upstream of the sewing machine comprises a disc having notches which receive tailor-tacks of the selvedge edges and are swung aside by rotation of the disc to lift the tailor tacks upwardly well clear of the sewing machine needle whereupon the tack escapesfrom the notch and the disc rotates until a fresh notch is presented to the selvedges to be stitched together.
  • the present invention relates to a machine for assembling knitted articles which are provided, along at least one of their borders, with a selvedge forming a roll or curl, and more particularly to a machine intended to effect the assembling automatically.
  • the method has a major drawback in that it is essentially manual from the introduction into the guideway until the arrival at the sewing machine. Movement, and above all positioning, of the articles relative to the machine are manual with the resulting disadvantages of wastage of time, the necessity for experienced personnel, and possible irregularities of assembling.
  • the devices have the disadvantages that the mode of producing the guideways makes introduction and above all positioning of the articles into such guideways difficult as soon as at least one of the articles is itself composed of two knitted pieces which have previously been assembled and thus have an additional localised transverse bulge resulting from the seam of the two pieces.
  • an automatic machine for assembling knitted articles which are provided nearat least one of their selvedges with a roll extending along the direction of movement of said articles, such machine comprising an introduction guideway consisting of two coplanar horizontal blades which define a gap of adjustable spacing; a conveyor associated with the introduction guideway for ensuring movement of said articles along the guideway; means for unrolling the selvedges of articles moved along said guideway, said unrolling means including means for placing the articles under tension; a sewing machine for joining the selvedges of such tensioned ar-Y ticles, thread cutting means; and transfer means for temporarily ensuring advance of articles from said guideway to the sewing machine. while guiding said articles through said selvedge unrolling device.
  • FIG. 1 shows a side elevational view of a machine according to the invention and adapted for assembling articles having an artificial roll incorporated in a selvedge of each article;
  • FIG. 2 shows a top plan view of the machine of FIG.
  • FIG. 3 shows in section one embodiment of the positioning guideway in one of its positions corresponding to a view on the line IIIIII of FIG. 2;
  • FIG. 4 is a view similar to FIG. 3 but shows the guideway in a further position
  • FIG. 5 shows an alternative embodiment of the positioning guideway
  • FIG. 6 shows a partially schematic, perspective view of a machine according to the invention intended for assembling articles whose selvedges have natural bulges;
  • FIG. 7 shows a side elevational view of the selvedge roll unwinding device in the machine of FIG. 6;
  • FIGS. 8 to 11 show vertical sections of the selvedge roll unwinding device viewed along the lines VIII- --VIII, IX-IX, XX and XI-XI, respectively of FIG.
  • FIGS. 12 to 14 show schematically the logic control circuits of the various elements of a machine according to the invention.
  • FIG. 15 shows an assembled knitted article such as a pullover
  • FIG. 16 shows the knitted article of FIG. 15 in one position during the assembly operation
  • FIGS. 17 to 20 are elevational views of a component of the selvedge roll unwinding device, and show the component in various successive working positions.
  • the machine comprises an introduction guideway 1 consisting of two coplanar horizontal blades la and lb mounted on supporting angle irons only one, 1d, of which can be seen in FIG. 1.
  • a rectangular groove 1c intended to receive two knitted articles 2 and 3 to be assembled.
  • One of the major sides of the blade 1a is parallel to one of the major sides of the blades 1b to define a constant width to the groove.
  • the articles 2 and 3 must be provided at their selvedge edges with longitudinal retaining rolls in this case artificial rolls 2a and 3a.
  • the two blades la and lb are each mounted on their supporting angle iron, e.g. 1d, by fixing means which permit the spacing of the said blades and the width of the gap which separates them to be adjusted as afunction of the thickness of the articles 2 and 3 to be assembled.
  • An endless chain 4 passes around two sprockets 5 and 6, one of which, 5, is positioned above the upstream end of the gap 1c of the introduction guideway and the other, 6, of which is placed above the portion of the gap 10 which is just upstream of both an unrolling device 8, 9, 14, 21, 22, and the downstream end of said gap 10.
  • upstream and downstream are referred to in the sense of feed movement of the articles to be assembled.
  • the chain sprockets 5 and 6 are each mounted on a horizontal shaft so as to ensure parallelism, and in the same vertical plane as the chain 4 and the longitudinal axis of the gap of the guideway 1.
  • the outer side of the chain 4 has attached thereto, for example adhesively, at least one shoe 7 intended to come into contact with'those selvedges of the articles 2 and 3 at which the artificial retaining rolls 2a and 3a are formed.
  • the selvedge unwinding device which is positioned directly downstream of the introduction guideway 1 comprises a pair of unrolling shoes 8 and 9 of known kind, such as that currently employed in dished sewing machines for manual assembly of knitted articles, and of a vertical disc 14 of generally circular shape placed partially between the shoes 8, 9. Additionally two brush discs 21 and 22 are provided as will be described in detail below.
  • Each of the shoes 8, 9 is hinged with respect to the chassis, not shown, of the machine on a spindle 10, 11 extending parallel to the edges of the gap 10 of the guideway 1 and at a higher level than the horizontal plane of the guideway.
  • the two shoes are positioned, symmetrically with respect to the vertical plane passing through the longitudinal axis of the gap 10, in such manner as to each have their tips of a shape suitable for unwinding the selvedges of knitted fabric in the downstream extensions of the blades 1a and lb of the introduction guideway.
  • each groove 8a and 9a which is open upwardly and towards the other shoe and is intended to facilitate the guidance of the reinforced selvedge forming the bulges 2a, 3a of the corresponding article 2, 3 between its shoe 8 or 9 and the disc 14 disposed between the two shoes and partially penetrating the downstream end of the gap 1c of the guideway 1.
  • the lower surface of each groove 8a or 9a issituated substantially in the same plane as the upper surface of the blade la or 1b.
  • a horizontal pin 12 directed perpendicularly of the longitudinal axis of the gap 10 passes through the shoe 8, slightly above its groove 80, while a further similar pin traverses the other shoe 9 symmetrically with respect to the vertical plane passing through the longitudinal axis of the gap 1c.
  • the disc 14, partially positioned between the said shoes 8 and 9, is rotatable about a horizontal shaft 15 placed at a higher level than that of the gap 10 and is adjustable vertically, for example by a lever16 articulated to the frame, not shown, of the machine by means of a shaft 17.
  • the lever 16 may be pivoted by any suitable means not shown, for example a pneumatic jack, to enable the lever 16 to perform an angular oscillation such that the vertical spacing between the horizontal shaft 15 and the horizontal plane of the gap 1c can vary from a value which corresponds to the operating position and is clearly smaller than the radius of the disc 14 (i.e., wherethe disc 14 is partially engaged in the gap 1c), to a value somewhat greater than this radius and corresponding to the at rest position where the disc 14 is totally disengaged from the gapv 1c.
  • any suitable means not shown for example a pneumatic jack
  • the disc 14 can be locked in a position such that one of its notches 18 is in the zone of the downstream end of the gap 1c and at a level corresponding to that of the blades 1a, lb by, for example, a spring leaf 19 which engages in a detent 20 disposed in or near thcnext successive notch 18, one such detent being associated with each of the notches 18.
  • each brush disc 21 and'22 are mounted in the same inclined plane so that each is able to rotate on an inclined spindle 21a and 22a coincident with its axes of rotation.
  • These brush discs are disposed symmetrically with respect to the vertical plane of the disc 14, under each of the shoes 8 and 9, in such manner as to be approximately tangent to this vertical plane and that their shafts are parallel to the latter and they are each inclined at an angle of from 30 to 60 with the vertical.
  • the upstream portion of each brush disc 21 and 22 is situated at a level higher than that of the downstream portion of the brush disc.
  • a further, or positioning, guideway 23 is disposed at the exit of the selvedge unrolling device 8, 9, 14, downstream and in the immediate vicinity of the latter, and comprises two substantially rectangular flexible blades 23a and 23b as shown in more detail in the sectional representations of FIGS. 3 and 4.
  • One of the major sides of one of each blade is parallel to that of the other blade and e las mis st ssss es ast 23 and 23lidefine therebetween a rectilinear gap 23g and they are planar when no article is present in the gap 23g.
  • the upper major edges of the two flexible blades 23a and 23b each extend parallel to the axis of the gaps 1c and 23g, and the blades 23a and 23b themselves extend downwardly from those edges to define the semi-planes of a dihedral whose bisector plane is vertical and coincident with the plane of the disc 14.
  • the dihedral included angle is from 60 to
  • Each of the flexible blades 23a and 23b is fixed at its lower part between two rigid plates 23c and 23d or 23e and 23f (FIG. 3).
  • the two lowermost rigid plates 23c and 23e extend over almost all of the width of the respective rectangular blades 23a or 23b and brace the blades 23a and 23b so that the gap 233 is approximately equal to the thickness of the joined together articles 2 and 3, while the horizontal spacing between the upper edges of the lowermost rigid plates 23c and 23e at least equals the thickness increased by twice that between two articles.
  • the spacing between the flexible blades 23a, 23b will of course be increased as the blades deflect apart.
  • conveying and transferring grippers 24 and 25 situated below the level defined by the blades 10 and 1b at either side of the gaps 1c and 23g of the machine are rectilinearly movable along these gaps by the action of means, not shown, from thedownstream end of the introduction guideway 1 to that of the positioning guideway 23, and ensure that the articles are driven to the sewing machine.
  • the sewing machine is for example a whip-stitch machine having notched dishes, schematically indicated by its two dishes 26 and 27, and the assembly operation is completed by a chain-stitch severing device consisting of two pneumatically controlled articulated cutting blades 28 forming scissors positioned at the exit of the sewing machine.
  • the mode of operation of the above described machine is as follows.
  • the two articles 2 and 3 to be assembled, having selvedges which each comprise a guiding and retaining roll 2a and 3a, are manually offered at the upstream end of the introduction guideway 1 and are then introduced over a few centimetres between the blades la and lb so that the rolls 2a and 3a rest on the upper plane of these blades.
  • the selvedges 2a, 3a of the two articles are provided with tacking stitches 29, for example a tailor tack made on a known sewing machine of the stop stitch type.
  • tacking stitches 29 join the selvedges 2a, 3a of the two articles at the ends of the intended seam and optionally also between the ends of the seam at points where the articles themselves are formed by interconnection of two sub units, for example where the bust portion andthe sleeve portion are joined together and also closed along one composite seam.
  • the chain 4 is started manually so that the shoe 7 comes into contact with the selvedges 2a, 3a and entrains the articles 2, 3 to the downstream end of the introduction guideway where the shoe 7 abandons the articles and returns along the upper run of the chain to its starting position.
  • the conveying and transferring claws or grippers 24 and 25 engage the articles 2 and 3 and now drive them from the introduction guideway through the selvedge unrolling device 8, 9, 14, 21, 22, as far as the dishes 26 and 27 of the sewing machine.
  • the articles 2 and 3 trigger a sensor (not shown) which through the intermediary of this actuating means, initiates (d) the closing together of the shoes 8 and 9, (e) closing together of the brushes 21 and 22 and (f) downward movement of the disc 14 between the two articles each of which will now be lightly squeezed or pinched between a shoe 8 or 9 and the disc 14.
  • the articles 2 and 3 enter into the positioning guideway 23 where the guidance rolls 2a and 3a apply themselves to the upper edges of the flexible blades 23a and 23b. They are delivered to and held in this position by the action of the brush discs 21 and 22 which, being driven to rotate by the movement of the articles 2 and 3, exert a vertically downward pull on the two articles.
  • the positioning guideway 23 is positioned such that the upper edges of the blades 23a and 23b are at the same level as the upper rim 26a and 27a of the sewing machine dishes 26 and 27 so that the selvedges of the articles 2 and 3 should be correctly positioned relative to these dishes as the needle 30 works above these dishes.
  • one of the claws actuates a sensor, not shown, which sets the sewing machine in motion thus rotating the dishes and returning the claws 24 and 25 to their starting position. Assembling is then performed by the sewing machine in a known manner.
  • a sensor commands stopping of the machine, actuating of the chain-stitch cutter 28 to separate the articles from the thread in the needle and shuttle of the sewing machine, raising of the disc 14 and moving apart of the unrolling shoes 8 and 9 and of the brush discs 21 and 22.
  • FIG. shows a different embodiment of the positioning guideway 23 in which the expected function of the guideway is to support the articles 2 and 3 while resiliently coping with a localised widening of its gap caused by the presence of a transverse seam 2b on at least one of the articles, without however narrowing the width of the gap through the action of the vertically downward traction exerted on the said articles by the brush discs 21 and 22.
  • This function which was fulfilled in the first described article by the flexible blades each of which rested on a rigid plate 23c, 23e and was thus flexible in the sense of gap widening while being braced by the plates 230, 232 in the sense of said gap contracting, is now performed only by the shape given to two flexible blades 23a, 231).
  • the guideway consists of two resilient blades each of which normally has the cross-sectional shape of a surface generated by a horizontal generatrix moving laterally along an arc of curve which lies in a plane perpendicular to said generatrix, the curve being upwardly concave and having a slope tending to the vertical in the vicinity of its upper end and forming an angle of 30 to 60 with the vertical in the vicinity of its lower end.
  • the gap in the guideway is formed between the upper edges'of the blades and the two blades are placed symmetrically with respect to a vertical plane parallel to their generatrices.
  • FIGS. 1 to 4 A further variant of the embodiment of FIGS. 1 to 4 consists in replacingthe two conveying and transferring claws 24 and 25, which here have symmetrical positions, by a single gripper associated with a stationary vertical pressure plate placed parallel to the disc 14 and at a sufficient lateral spacing from the pressure plate for permitting one of the knitted articles to pass.
  • a notch will be provided at the location of that brush disc which is situated to the same side of the disc 14.
  • the single gripper for conveying and transferring will press the two knitted articles against the pressure plate which extends over the entire length of its travel and will entrain them for movement to the sewing machine as has been indicated above.
  • FIG. 6 shows schematically and partially in perspective an assembling machine which is particularly suitable forassembling jersey knit articles or panels.
  • the knitted articles 2 and 3 are provided near at least one of their edges with a reinforced selvedge forming an artificial guidance roll 2a, 3a.
  • this artificial roll is no longer necessary since the natural curl, especially of jersey knit articles, forms a bulge or roll which is sufficiently large for the two knitted articles 2, 3 not to slide vertically between the two horizontal blades la and lb which form part of the introduction guideway 1. Consequently the spacing between the two blades 1a, 1b will be greater than that provided in the case of the machine of FIGS. 1 and 2 and will readily permit passage of the excess thicknesses which may for example result from seams of lateral selvedges.
  • the positioning guideway 23 formed of two resilient blades has been omitted in the present embodiment and the introduction sliderl is extended up to the dishes 26 and 27 of the sewing machine.
  • the assembly comprising the unrolling shoes 8 and 9,
  • the unrolling shoes 8 and 9 are now placed slightly above the upper surface of the guideway l and have been extended at their downstream ends so as to each enable the mounting of two positioning pins 12, 12a in series, the first pin 12 being situated just downstream of the tip 8b or 9b of the respective shoe and on the same level as the upper surface of the tip, while the second pin 12a is situated close to the downstream end of its shoe 8, 9 at a lower level than the pin 12 and near the upper surface of the blades la, 1b of the guideway I.
  • the pins 12 penetrate into the space situated between each shoe and the disc 14 and the pins 12a penetrate into the space between the shoes, and in each case the pins bearing like reference numerals are uncoaxial pairs.
  • the function of the pins 12a is toperfect the positioning, with respect to the needle 30 of the sewing machine (see FIGS. 10 and 11), of the height of thetwo edges or selvedges 2a, 3a which have previously been unrolled on the lengthened tips 8b, 9b of the shoes under the influence of the action of the brush discs 21, 22 (see FIGS. 8 and 9).
  • Each of the brushes has on its periphery a multitude of tufts of bristle 21b and 22b which extend radially and are capable of coming into tangential contact with the corresponding articles or knitted panels 2, 3 when the latter are situated in the zone of the unrolling devices 8, 9, 14, 21, 22.
  • the stiffness of these bristles and/or the spacing of the brush discs 21, 22 is/are chosen such that the traction force exerted by the brush discs 21, 22 in the downward direction is sufficient to ensure unrolling of the selvedge curl and the precise positioning of the selvedges 2a, 3a of the articles 2, 3 without the selvedges being able to escape downwardly out of the guideway 1.
  • the conveying chain 4 includes, in addition to the shoes 7, a contact shoe 40 which is capable of successively cooperating with two pneumatic sensors 41 and 42.
  • the relative positions between the shoes 7 and 40 and the sensors 41 and 42 are such that the first sensor 41 is actuated by the shoe 40 upon arrival of the shoe 7, during its movement from the sprocket 5 to the sprocket 6 on the lower run of the chain 4, in the vicinity of the downstream sprocket 6.
  • the second sensor 42 is later actuated by the same shoe 40 when the shoe 7 has lost all contact with the articles 2 and 3 and is for example situated on the portion of chain which is in contact with the sprocket 6.
  • the first sensor 41 is inserted in a pneumatic control circuit for applying and advancing the grippers 24, 25 (see FIG. 14) whose inoperative or starting position is initially somewhat upstream of the sprocket 6.
  • the second sensor 42 is incorporated in a circuit which controls the stopping and starting of the conveyor chain 4.
  • a third sensor 43 Upstream of the unrolling device 8, 9, 14, 21, 22, in the path of the knitted articles 2, 3 and below the guideway 1 is a third sensor 43 which is also inserted in the pneumatic circuit controlling the application and advance of the grippers 24, 25 but is not actuated until after articles 2 and 3 passing this sensor has moved on and their absence is detected at the location of the sensor 43, as will be explained hereinafter.
  • a fourth sensor 44 called the pre-control sensor is disposed upstream and close to the selvedge unrolling device 8, 9, 14, 21, 22 but downstream of the sensor 43, such that its detection member or feeler 44a is situated at the location of the gap of the slider 1 and can there ascertain the presence or absence of articles 2, 3.
  • This pre-control sensor 44 is mounted in the circuit which controls the setting in motion of the sewing machine 26, 27, 30.
  • a fifth sensor 45 disposed laterally of the gap 10 and below the blade 1a of the guideway 1, for example substantially vertically of the first positioning pin 12.
  • This sensor 45 is arranged to be tripped by the conveying or transferring gripper 24 and is also mounted in the circuit which controls the setting in motion of the sewing machine 26, 27, 30.
  • one of the dishes 26, 27, for example the dish 26, is mounted so as to have its axis of rotation movable relative to that of the other, stationary dish, for example dish 27, so as to move sideways away from the fixed dish 27 when the two articles 2 and 3 to be assembled are introduced between the two dishes 26, 27.
  • the shaft 26b of the dish 26 is mounted by means of ball bearings, not shown, on a bellcrank 50, 51 shown schematically in FIG. 6 as being articulated at the point of its knee on a support 52 through the intermediary of a shaft 53 parallel to the gap 1c of the slider 1.
  • the horizontal arm of this bellcrank 50, 51 carries at its free end an adjustable stop screw 54 capable of triggering a sixth sensor 46, called the holding sensor, also connected in the circuit controlling the setting in motion of the sewing machine 26, 27, 30.
  • the bellcrank 50, 51 can thus pivot in a vertical plane perpendicular to that of the disc 14, with its arms 50, 51 swinging in the direction of the arrows F F or F F
  • the sensor 46 is additionally connected in the circuit which controls the positioning of the shoes 8, 9 of the disc 14 and the brushes 21, 22.
  • the rod 24a for advancing the transport claw 24 comprises, at a suitable location, an end-of-advancetravel abutment 24b positioned to contact the actuating member 47a of a seventh sensor 47 connected in the circuit controlling the jack which displaces the grippers 24, 25 and which triggers stopping of the advancing movement (arrow F and return movement (arrow F of said grippers when they reach a position in register with the dishes 26, 27, in which position the articles 2, 3 will already have become nipped between the notched portions 26a, 27a of the dishes 26, 27 and the abutment 24b simultaneously bears on the actuating member 47a of the sensor 47.
  • the initial return travel of the grippers 24, 25 is interrupted when they reach the waiting position under the detection member 44a of the sensor 44 which is at the level of the gap 1c and just upstream of the disc 14.
  • Application of the grippers 24, 25 at the rear end of the articles 2 and 3 and also their renewed advance towards the sewing machine 26, 27, 30 are both controlled by the third sensor 43 once it detects departure of the articles 2, 3 from its vicinity.
  • Two further sensors 48, 49 connected in series in the control circuit of the sewing machine each respond to one of the two seaming threads and stop the said machine when either thread breaks.
  • FIGS. 12, 13 and 14 which illustrate schematically the fluid logic circuits of the control systems, a vent port is represented throughout by a hollow arrowhead A and mains pressure by a solid arrowhead A.
  • NON used for gates 61, 82 and 88 throughout this Specification denotes an exclusive OR gate which has two inputs and one output and will provide an output signal only when one alone of its input or balanced input signals will not give rise to an output signal while the term NON gate used for gates 65, 75, 80 and 86 denotes a simple NON gate with one input and one output which will not give rise to any output signal if there exists an input signal.
  • AND gate used in this Specification denotes a well-known AND gate which has two inputs and one output and gives rise to an output signal only when the two inputs are fed simultaneously.
  • OR gate used throughout this Specification denotes an inclusive OR gate which has two inputs and one output and gives rise to an output signal when at least one of its inputs if fed.
  • FIG. 12 shows the logic circuit controlling the jack 28a which actuates the chain-stitch cutter 28.
  • This circuit includes the pneumatic sensor 46 which is actuated as the dish 26 swings aside and feeds on the one hand via a line 61a, a first input of a NON gate 61 and, on the other hand via a line 62a a pneumatic resistance 62 and a pneumatic condenser 63 mounted in series with said resistance, a second input of the same NON gate 61 the output of which feeds a first input 64a of a pilot valve or pneumatic distributor 64.
  • the distributor 64 ensures supply of mains pressure air, from a supply 77, to the jack 28a.
  • the output of the NON gate 61 is additionally connected to one input of a second NON gate 65 the output of which feeds, in the absence of an input signal from the NON gate 61, the second input 64! of the distributor 64 and thus cancels the mains supply to the jack 28a and therefore commands actuation, i.e., clos ing, of the chain-stitch cutter 28.
  • FIG. 13 shows the pneumatic control circuits of, on the one hand, a clutch capable of connecting a constantly rotating drive motor to both the shaft integral with the fixed dish 27 of the sewing machine 26, 27, 30, and the shaft actuating the needle 30 and, on the other hand, a number of actuating jacks associated with the disc 14, the shoe 8 and 9 and the brush discs 21, 22 and among which only one jack 70, that associated with the disc 14, has been shown in FIG. 13.
  • the output of the AND gate 72 is connected on the one hand to a first input 74a of a pilot valve or distributor 74 and on the other hand, via a pilot pressure fed NON gate 75, to the second input 74b of that distributor 74.
  • the mains source of compressed air schematically indicated at 77, can effect engagement or disengagement of the clutch.
  • the output of the pneumatic sensor 46 is also connected to one of the two inputs of a third AND gate 78 whose other input is fed from the output of sensor 44.
  • the output of this AND gate 78 is on the one hand directly connected to the first control input 79a of a further pilot valve or distributor 79 and on the other hand, via a NON gate 80, to the second input 79b of the same distributor 79.
  • This distributor 79 communicates a mains source of compressed air, again schematically shown at 77, to the jack 70 controlling the disc 14 (and the shoes 8, 9 and the brush discs 21, 22) such that: this jack 70 is energized to actuate and hold in operation the disc 14 (and the shoes and brush discs) when the input 79a is directly supplied by the AND gate 78; or that the said jack 70 is vented to atmosphere and the disc 14 raised and the shoes 8, 9 and brush discs 21, 22 moved aside under the influence of return springs, not shown, when the input 79b is supplied.
  • FIG. 14 shows the pneumatic control circuit of the transfer gripper or grippers 24, 25.
  • the forward movement of the gripper 24 (and also that of the gripper 25) in the direction of the arrow F is triggered when the shoe 40 of chain 4 actuates the sensor 41 whose output pulse is connected to one of the inputs of an OR gate 81.
  • the output of this OR gate 81 is connected to one of the inputs of a first NON gate 82.
  • the NON gate When it receives a signal at its input fed from the OR gate 81, the NON gate directs via its output one (83a) of the two inputs 83a, 83b of a further pneumatic distributor or pilot valve 83 such that a pulse of mains compressed air from supply 77 is delivered to the rear chamber of the actuating jack 240 of the gripper 24 via, on the one hand, a holding valve or pneumatic diode 84 opening towards the rear chamber and, on the other hand, a pneumatic resistance 85 mounted in parallel with said valve 84.
  • the continued advance of the gripper 24 is ensured by the sensor 43 which in response to arrival of the article feeds the input of a signal inverting, second NON gate 86 the output of which is directly connected to a first input and additionally, via a pneumatic resistance 87, to the second input of a third NON gate 88 whose output is connected to the second input of the OR gate 81.
  • the advance of the gripper 24 thus proceeds until the gripper reaches the dishes 26, 27 and is interrupted when the sensor 47 is actuated by the end-of-travel abutment 24b.
  • the output of this sensor 47 is connected on the one hand to the second input of the NON gate 82 and also to the second input 83b of the distributor 83.
  • the distributor 83 when the sensor 47 is actuated the distributor 83 will be actuated to give priority to the position in which it enables the front chamber of the command jack 240 to be supplied to drive the gripper 24 in the return direction, this supply being simultaneously effected via a pneumatic diode or holding valve 89 opening toward the said front chamber and also a pneumatic resistance 90 mounted in parallel with this holding valve 89.
  • the pneumatic resistances 85 and 90 formed for example as adjustable throttles permit the advancing and retreating speeds of the gripper 24 to be varied.
  • the retreating movement (arrow F FIG. 6) is interrupted for a first time when the sensor 43 senses departure of the articles upon losing contact as they enter into the selvedge unrolling device 8, 9, 14, 21, 22.
  • the gripper 24 is situated just level with the vertical marginal zone at the rear of the-articles 2, 3.
  • the loss of an output signal at the sensor 43 restores priority to the signal consequently applied at the input 83a of the distributor 83 so that the gripper 24 is applied to the rear end of the articles 2, 3 and accompanies them during the travel of their rear ends to the dishes 26, 27 where the sensor 47 again commands retreat of the gripper 24.
  • FIGS. 15 and 16 show a textile article the assembly of which involves joining together two articles or textile panels 2, 3 such as can be efiected by the machines described above.
  • this textile article is a pullover having cuff ribbings 92, 93 and a waist ribbing 94 as well as panels which comprise the front and back of the chest 95 and also the sleeves 96, 97.
  • the upper or shoulder ends of the sleeves have been sewn to the openings 98 provided for this purpose on the chest panel 95.
  • the edge ribbings 92, 93, 94 are knitted in a rib interlacing, for example either in 1 and 1 rib or in 2 and 2 rib, which will not curl at the selvedge.
  • the chest panels 95 and the sleeves 96, 97 are knitted in thinner jersey than the rib-knit parts and curl along the selvedges 99. It is especially along these selvedges 99 that the chest 95 and the sleeves 96, 97 are to be assembled, following the broken line 100 indicated as a dotted line in FIG. 15.
  • This shape of the notch 18 is such that its bottom 18a is slightly above the guideway 1 while downstream of and close to the vertical plane passing through the shaft 15 of the disc 14 when the notch 18 occupiesits receiving position (FIG. 17) where the nose 18b defining the mouth of the notch and the bottom of the notch are situated substantially at the same level somewhat above the guideway 1.
  • the bottom 18a of the notch is situated at a radial spacing from the axis of the disc which is approximately equal to that between the upper surface of the introduction guideway 1 and the shaft 15 of the disc 14 in the working position of the disc, it is apparent that from this receiving position of the notch onward the notch bottom 18a executes only a very slight descending movement when the disc 14 is made to rotate in clockwise direction under the influence of the tacking stitch 29 moving with the articles in the direction of the arrow F
  • the notch 18 is, at either side of the bottom 18a, defined by curves 18c, 18d which between them form an acute angle, and that the curve 18d which is situated at the same side of the notch as is the shaft 15 of the disc is comparable to a tangent of a circle having the shaft 15 as its centre and a radius at least a few millimetres smaller than the spacing of the guideway 1 from the shaft axis, the joining stitch 29 is never pushed downwards during the rotation of the disc 14.
  • the edge 18c, situated at the side of the periphery of the disc 14 curves slightly towards the outside, and the nose 18b which rejoins said edge 180 is located on the tangent of a circle centered on the shaft 15 and having as its radius the distance between said shaft 15 and guideway 1 and having as its point of tangency with that circle that point which is situated vertically below the shaft 15 when the notch 18 occupies its receiving position such as the one indicated in FIG. 17.
  • the notch 18 comprises a mouth extending approximately in a radial direction of the disc and a retreating portion following the mouth and stretching approximately parallel to the periphery of the disc and defining the bottom of the notch. It is clear that as the disc 14 rotates clockwise through the FIG.
  • FIG. 19 and FIG. 20 positions the tacking stitch 29 will be lifted as soon as it passes the vertical plane through the axis of shaft 15 and cannot liberate itself from the notch 18 (FIG. 20) until after having performed an ascending movement (FIG. 19) during the course of its displacement along the direction of arrow F
  • the tacking stitch 29 virtually maintains its raised position from the time when it leaves the notch 18 until it enters the sewing machine 26, 27, 30 where it remains well above the dishes 26, 27. It has thus been ensured that the seam at the under-arm region 101 satisfactorily holds the two selvedges despite the natural hollow normally present at this place.
  • the two articles 2 and 3 whose selvedges each form a natural roll 2a and 3a are manually presented to the upstream end of the introduction guideway 1 and are then introduced over a few centimetres between the blades 1a and 1b in such a manner that the rolled portions 2a and 3a rest on the upper plane of the blades la and lb.
  • tacks 29 have earlier been made with a known form of sewing machine of the stop stitch type.
  • the chain 4 is manually set in motion, so that the shoe 7 comes into contact with the rolled portions 2a, 3a of the articles 2, 3, and applies the rolls 2a, 3a against the upper surfaces of the guideway blades 1a, 1b and drives them, and thus the articles 2, 3, to a position upstream of the selvedge unrolling device comprising the disc 14 and unrolling shoes where the shoe 7 releases the articles 2, 3 and the chain 4 continues its movement to return the shoe 7 to its starting point of departure.
  • the transfer grippers 24 and 25, which are caused to grip on the articles and are set in motion in the direction of the arrow F by the actuation of the sensor 41 responsive to the shoe 40, then entrain the articles 2 and 3 through the selvedge unrolling device 8, 9, 14, 21, 22 towards and up to the dishes 26 and 27 of the sewing machine.
  • the sensor 44 will merely be tripped by the presence of the articles to prepare for the approach of the shoes 8 and 9 and of the brush discs 21 and 22 to their operative positions and for the descent of the disc 14 between the two articles, these movements being executed only at the instant when the articles 2 and 3 penetrate between the dishes 26 and 27, to move the dish 26 in the direction of the arrow F and cause the screw 54 to trip the sensor 46 linked to the sensor 44 as shown in FIG. 13.
  • the chain-stitch cutter 28 will, as shown in FIG. 12, be actuated simultaneously by the sensor 44.
  • the selvedges are led to the tips 8b, 9b of the shoes 8 and 9 and are unrolled by the shape given to each tip, and the edge-to-edge positioning of the selvedges is obtained by the passage under the pins 12 and 12a.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US00404759A 1973-10-08 1973-10-09 Machine for automatic assembly of knitted articles Expired - Lifetime US3834331A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT69959/73A IT996792B (it) 1973-10-08 1973-10-08 Macchina automatica per l assemblag gio degli articoli di maglieria

Publications (1)

Publication Number Publication Date
US3834331A true US3834331A (en) 1974-09-10

Family

ID=37434158

Family Applications (1)

Application Number Title Priority Date Filing Date
US00404759A Expired - Lifetime US3834331A (en) 1973-10-08 1973-10-09 Machine for automatic assembly of knitted articles

Country Status (6)

Country Link
US (1) US3834331A (fr)
BE (1) BE805759A (fr)
DE (1) DE2350439C2 (fr)
FR (2) FR2202520A5 (fr)
GB (1) GB1440495A (fr)
IT (1) IT996792B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4359956A (en) * 1978-11-11 1982-11-23 Tomotake Nakahira Apparatus for toe closure of hosiery
FR2601971A1 (fr) * 1986-07-28 1988-01-29 Conti Complett Spa Type de point de surjet ainsi que procede et dispositif pour la production de ce point.
FR2616161A1 (fr) * 1987-06-02 1988-12-09 Sotexi Machine permettant de realiser la couture de deux panneaux tricotes comportant un bord cote et un long en jersey
US4846085A (en) * 1986-12-19 1989-07-11 Asahi Kasei Kogyo Kabushiki Kaisha Method for linking knitted fabric pieces and apparatus thereof
US4957051A (en) * 1988-04-11 1990-09-18 Takatori Corporation Automatic fitting apparatus for hose part of half made pantyhose
EP0636729A2 (fr) * 1993-07-30 1995-02-01 CONTI COMPLETT S.p.A. Procédé pour la fabrication d'articles de bonneterie et machines à tricoter et à coudre
WO2018094402A1 (fr) * 2016-11-21 2018-05-24 Nike Innovate C.V. Machine à coudre de rassemblement et procédé

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2326353A1 (fr) * 1975-10-03 1977-04-29 Inst Textile De France Installation pour le transfert d'articles a une machine automatique d'assemblage munie d'une glissiere d'introduction
IT227454Y1 (it) * 1992-01-29 1997-12-15 Rosso Ind Spa Convogliatore guida-calze per rimagliatrici munito di mezzi per la re- golazione veloce dell'apertura tra i bordi affacciati delle rispettive
DE4300091A1 (de) * 1993-01-06 1994-07-07 Malimo Maschinenbau Verfahren und Vorrichtung zum Verbinden zweier textiler Flächengebilde
CN109853164A (zh) * 2019-02-01 2019-06-07 詹镇远 一种用于狭小空间内部的自动剪线机构

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2669952A (en) * 1950-05-24 1954-02-23 James L Getaz Method and apparatus for sewing the loops at the toe of circular knit hose
US2948240A (en) * 1959-04-06 1960-08-09 Prestige Inc Looping machine and method
US3340834A (en) * 1963-04-09 1967-09-12 Rosso Giuseppe Method of and apparatus for knitting and linking articles of wear
US3487797A (en) * 1966-10-28 1970-01-06 Achille Peloggio Device for blind feeding of articles of hosiery to linking machines

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7205205U (de) * 1972-06-08 Liersch A Nähautomat für das mustergerechte Zusammennähen von Strickware
DE1758466U (de) * 1957-01-14 1957-12-19 Louis Bahner Elbeo Werke G M B Vorrichtung zum wechselseitigen entlueften der seitenteile des warenzufuehrungsapparates an strumpfnaehmaschinen.
FR1388433A (fr) * 1963-04-09 1965-02-05 Giuseppe Rosso Procédé et machine pour tricoter et fermer des articles de vêtement, en particulier des bas et articles ou bas conformes à ceux ainsi obtenus
US3469545A (en) * 1967-06-14 1969-09-30 Union Special Machine Co Conveyor sewing unit with shiftable top feed belt and work loading arrangement
CH520807A (it) * 1970-02-17 1972-03-31 Rosso Pietro & C S N C E Calzi Procedimento per la formazione e il fissaggio di collaretti a dei pezzi di tessuto a maglia, con l'impiego di una macchina rimagliatrice, e macchina rimagliatrice per l'attuazione del procedimento stesso

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2669952A (en) * 1950-05-24 1954-02-23 James L Getaz Method and apparatus for sewing the loops at the toe of circular knit hose
US2948240A (en) * 1959-04-06 1960-08-09 Prestige Inc Looping machine and method
US3340834A (en) * 1963-04-09 1967-09-12 Rosso Giuseppe Method of and apparatus for knitting and linking articles of wear
US3487797A (en) * 1966-10-28 1970-01-06 Achille Peloggio Device for blind feeding of articles of hosiery to linking machines

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4359956A (en) * 1978-11-11 1982-11-23 Tomotake Nakahira Apparatus for toe closure of hosiery
FR2601971A1 (fr) * 1986-07-28 1988-01-29 Conti Complett Spa Type de point de surjet ainsi que procede et dispositif pour la production de ce point.
US4846085A (en) * 1986-12-19 1989-07-11 Asahi Kasei Kogyo Kabushiki Kaisha Method for linking knitted fabric pieces and apparatus thereof
FR2616161A1 (fr) * 1987-06-02 1988-12-09 Sotexi Machine permettant de realiser la couture de deux panneaux tricotes comportant un bord cote et un long en jersey
US4957051A (en) * 1988-04-11 1990-09-18 Takatori Corporation Automatic fitting apparatus for hose part of half made pantyhose
EP0636729A2 (fr) * 1993-07-30 1995-02-01 CONTI COMPLETT S.p.A. Procédé pour la fabrication d'articles de bonneterie et machines à tricoter et à coudre
EP0636729A3 (fr) * 1993-07-30 1995-04-19 Conti Complett Spa Procédé pour la fabrication d'articles de bonneterie et machines à tricoter et à coudre.
US5555832A (en) * 1993-07-30 1996-09-17 Conti Complett S.P.A. Apparatus for manufacturing hosiery items and knitting and stitching machines
WO2018094402A1 (fr) * 2016-11-21 2018-05-24 Nike Innovate C.V. Machine à coudre de rassemblement et procédé
US11111617B2 (en) 2016-11-21 2021-09-07 Nike, Inc. Gathering sewing machine and method
US11702781B2 (en) 2016-11-21 2023-07-18 Nike, Inc. Gathering sewing machine and method

Also Published As

Publication number Publication date
DE2350439A1 (de) 1974-04-25
DE2350439C2 (de) 1984-02-23
FR2202520A5 (fr) 1974-05-03
FR2247101A5 (fr) 1975-05-02
BE805759A (fr) 1974-02-01
IT996792B (it) 1975-12-10
GB1440495A (en) 1976-06-23

Similar Documents

Publication Publication Date Title
US3871309A (en) Shirt front assembly, method and apparatus
US3834331A (en) Machine for automatic assembly of knitted articles
US3204590A (en) Conveyor seamer sewing machine
US3797423A (en) Fabric turnover, mating and sewing device
US5108017A (en) Sleeve flip over device
US4887858A (en) Device with adhesive for the holding of thin textile articles
KR870001272B1 (ko) 직물 소재의 재봉을 위한 방법 및 장치
JPS61502476A (ja) タオルの整列、切断、および縁縫い装置
US3469545A (en) Conveyor sewing unit with shiftable top feed belt and work loading arrangement
US3544098A (en) Methods and apparatus for automatically transferring and registering fabric workpieces
US5390614A (en) Method and apparatus for automatically attaching a collarette display and label to a garment body by using a two step sewing operation
EP0159507B1 (fr) Dispositif de tirage d'un article cousu de grande longueur hors du point de couture
EP0187815A1 (fr) Systeme d'alignement, de coupe et de bordage de serviette.
US3670679A (en) Cuff making method
US4541353A (en) Dual-chain sewing machine
US4538534A (en) Apparatus and method for processing hosiery blanks
EP0878573A2 (fr) Dispositif pour la mise sur une forme de bas
JPH02269805A (ja) スライドフアスナ部分を持つ布条片をズボン前部に取付ける方法及びこの方法を実施する縫い付け装置
US4315471A (en) Workpiece guide for sewing machines
US4173191A (en) Sewing unit with sectionwise shiftable clamping device
US3973506A (en) Method and apparatus for making shirt cuffs
US4036156A (en) Device for sewing together plies of material adjusted to equal lengths
CN107687050B (zh) 一种裤子的制作方法
US3099234A (en) Manufacture of baglike structures
US4034690A (en) Apparatus and method for forming belt loops