EP4121588A1 - Appareil et procédé d'assemblage d'une bande annulaire à un article tricoté comprenant un corps - Google Patents

Appareil et procédé d'assemblage d'une bande annulaire à un article tricoté comprenant un corps

Info

Publication number
EP4121588A1
EP4121588A1 EP21709748.4A EP21709748A EP4121588A1 EP 4121588 A1 EP4121588 A1 EP 4121588A1 EP 21709748 A EP21709748 A EP 21709748A EP 4121588 A1 EP4121588 A1 EP 4121588A1
Authority
EP
European Patent Office
Prior art keywords
loading
annular band
loading form
stretching device
around
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.)
Pending
Application number
EP21709748.4A
Other languages
German (de)
English (en)
Inventor
Mirco RUSTIONI
Franco DI VINCENZO
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.)
Golden Lady Co SpA
Original Assignee
Golden Lady Co SpA
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 Golden Lady Co SpA filed Critical Golden Lady Co SpA
Publication of EP4121588A1 publication Critical patent/EP4121588A1/fr
Pending legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B23/00—Sewing apparatus or machines not otherwise provided for
    • D05B23/007—Sewing units for assembling parts of knitted panties or closing the stocking toe part
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B9/00—Circular knitting machines with independently-movable needles
    • D04B9/40—Circular knitting machines with independently-movable needles with provision for transfer of knitted goods from one machine to another
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B33/00—Devices incorporated in sewing machines for supplying or removing the work
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B33/00—Devices incorporated in sewing machines for supplying or removing the work
    • D05B33/006—Feeding workpieces separated from piles, e.g. unstacking
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B33/00—Devices incorporated in sewing machines for supplying or removing the work
    • D05B33/02—Devices incorporated in sewing machines for supplying or removing the work and connected, for synchronous operation, with the work-feeding devices of the sewing machine
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B35/00—Work-feeding or -handling elements not otherwise provided for
    • D05B35/06—Work-feeding or -handling elements not otherwise provided for for attaching bands, ribbons, strips, or tapes or for binding

Definitions

  • the present invention relates to the machines for manufacturing knitted articles, in particular for manufacturing knitted garments, comprising a body, a pair of leg pieces and an annular band, especially an elastic band sewn to the body.
  • body and leg pieces are manufactured in a single knitting process using a circular knitting machine.
  • an elastic band and a knitted article, comprising the body and the leg pieces are manufactured separately, and then sewn together.
  • the knitted article is produced by separately knitting two tubular pieces, which are then partially cut in correspondence of an end thereof and sewn to form the knitted article.
  • Each tubular piece has an elastic edge.
  • the elastic edges of two tubular pieces are cut and then sewn together to form an elastic band that surround the user’ s waist when the garment is worn.
  • the WO-A- 2016/157055 discloses an apparatus facilitating the manual assembling operations.
  • This prior art apparatus comprises a loading form and a stretching device, which are brought in mutual coaxial position and move towards each other, thus bringing the loading form inside a space delimited by the stretching device.
  • this prior art apparatus provides for the following steps.
  • the knitted article is manually loaded onto the form, so that a body portion wraps a side loading surface of the loading form.
  • An annular strip, or band is manually loaded onto the stretching device.
  • the stretching device expands for stretching the annular band.
  • the form, onto which the knitted article has been loaded is inserted inside the annular band.
  • the stretching device is then removed, leaving the annular band adhering around the portion of knitted article surrounding and wrapping the loading form.
  • the prior art apparatus assists the operator only to a limited degree in simplifying some of the assembling operations for joining the annular band and the knitted article.
  • both the annular band and the knitted article shall be turned inside out before being loaded onto the stretching device and the loading form.
  • the annular band and the knitted article are manufactured using a knitting machine, typically a circular knitting machine. Once knitted, they have a right side and a reverse side.
  • both the semi-finished products have the right side facing outwards and the reverse side facing inwards.
  • the finished garment is worn with the right sides of the annular band and of the knitted article comprised of body and leg pieces facing outwards. Sewing shall be performed so the seam is not visible on the right side of the garment, i.e. so that the seam is inside.
  • a method for joining a fabric annular band, comprising a first hem and a second hem, to a knitted article having a body and two leg pieces, the body ending with an open edge intended to be joined to the annular band along the first hem of the annular band.
  • the method comprises the following steps in sequence: a) firstly, an annular band is loaded onto a loading form having an outer loading surface extending around an axis of the loading form, the loading surface being delimited between a first border and a second border.
  • the annular band is loaded onto the loading form so that the first hem of the annular band is near the first border of the loading surface; b) then, a portion of the body of the knitted article is loaded around the loading form on the annular band, with the open edge aligned with the first hem of the annular band; c) afterwards the first hem of the annular band and the open edge of the body are joined together; d) lastly, the knitted article with the annular band sewn thereto is removed from the loading form.
  • this method allows to load the knitted article and the annular band onto the form without the need of turning them inside out with respect to how they are manufactured by the knitting machine.
  • the arrangement and the step sequence is such that the seam between the annular band and the knitted article is located on the reverse side of the finished garment.
  • the step of loading the annular band onto the loading form comprises, in turn, the following steps: inserting a stretching device into the annular band; engaging the annular band with the stretching device and stretching the annular band by means of the stretching device, thus creating a space inside the annular band; moving the stretching device, onto which the stretched annular band is applied, and the loading form towards each other, so that the loading form is placed in the inner space delimited by the annular band; transferring the annular band from the stretching device to the loading form, making the annular band adhere to the loading surface of the loading form; and moving the stretching device away from the loading form.
  • the following additional steps may be also provided: engaging the annular band by an engaging member, which adheres to an outer surface of the annular band at at least two points spaced from each other; lifting the annular band by the engaging member, causing the annular band to open by gravity; inserting a pair of approximately parallel positioning rollers into the annular band; stretching the annular band by moving the positioning rollers away from each other and releasing the annular band from the engaging member; and after having inserted the stretching device into the annular band, between the positioning rollers, transferring the annular band from the pair of positioning rollers to the stretching device.
  • the step of engaging the annular band by the engaging member may comprise the step of making the outer surface of the annular band adhere to an adhesive tape co acting with the engaging member or being part thereof; and the step of releasing the annular band from the engaging member may preferably comprise a step of moving the annular band with respect to the adhesive tape.
  • a step is provided of angularly positioning the annular band on the two positioning rollers. This can be achieved, for example, by synchronously rotating the two positioning rollers and detecting a desired angular position of the annular band by means of a reference mark applied to the annular band and a sensor adapted to detect the mark.
  • an apparatus for joining a fabric annular band, comprising a first hem and a second hem, and a knitted article, having a body and two leg pieces, the body ending with an open edge intended to be joined to the annular band along the first hem of the annular band.
  • the apparatus comprises at least a loading form having an outer loading surface extending around an axis of the loading form, the loading surface being delimited between a first border and a second border.
  • a plurality of loading forms is preferably provided, carried by an equipment transferring them sequentially through a plurality of stations.
  • the equipment may be a carousel, turning around a vertical rotation axis, for instance.
  • the apparatus advantageously comprises a stretching device adapted to receive and to stretch the annular band.
  • the stretching device and the loading form are movable one with respect to the other so as to position the stretching device around the loading surface of the loading form and to release the annular band onto the loading surface of the loading form.
  • a pick-up device is also provided, adapted to take individual annular bands from a storage space and to load them automatically onto the stretching device.
  • Figs.1 A and IB schematically show a garment in the form of tights, comprising an annular band FA and a knitted article M, illustrated before and after having been joined together by the apparatus described herein;
  • Fig.2 shows a plan view of an apparatus according to the invention
  • Figs.3A and 3B are isometric views of the apparatus of Fig.2, where the loading station for loading the annular bands has been omitted;
  • Fig.4 is an isometric view of the annular band loading station
  • Fig.5 is a side view of the annular band loading station
  • Fig.6 is an isometric view of the pick-up device for taking the annular bands, arranged in the loading station;
  • Fig.7 is a side view of the pick-up device of Fig.6;
  • Fig.8 is a front view of the pick-up device of Figs.6 and 7;
  • Figs.8 A and 8B are isometric views, from the top and the bottom, of the rollers of the pick-up device and the respective support slide;
  • Fig.9 is an isometric view of the stretching device and of a pressure member for transferring the annular bands from the stretching device to the loading form;
  • Figs.10, 11 and 12 show an operative sequence of taking an annular band from the storage space by the pick-up device of Figs.6 to 8;
  • Fig.13 is an isometric view of the pick-up device positioned for transferring an annular band to a pair of motorized rollers;
  • Fig.14 is an isometric view of the motorized rollers of Fig.13 in mutual spaced position for preparing the annular band to be transferred onto the stretching device;
  • Figs.15 and 16 are isometric views of operative steps for transferring the annular band from the stretching device to a loading form
  • Figs.17 and 18 are front and rear isometric views of a loading form
  • Fig.19 is an isometric view with some parts cut away, showing the relative position of loading form, stretching device and member during the step of transferring the annular band from the stretching device to the loading form;
  • Fig.20 is an isometric view analogous to that of Fig.17, showing the annular band loaded onto the loading form;
  • Fig.21 is an isometric view of blocking pads for blocking the annular band on the loading form during the step of loading the knitted article;
  • Fig. 22 is an isometric view analogous to that of Fig.21, showing the relative position of pads and loading form, with the annular band loaded onto the loading form;
  • Figs.23 and 24 are isometric views of the knitted article being loaded onto the loading form
  • Fig.25 is a cross-section of the loading form, onto which an annular band and a knitted article are loaded;
  • Figs.26 and 27 are front and rear isometric views of a gripping unit in the sewing station;
  • Fig.28 shows a cross-section of the gripping unit of Figs.26 and 27;
  • Fig.29 is an isometric view of the sewing station with a loading form engaged by the gripping unit;
  • Figs.30(A) to 30(H) show a sequence of the sewing operations
  • Fig.31 is an isometric view of the unloading station where the garment is removed from the loading form.
  • Figs.32(A) to 32(S) show a sequence of the unloading operations for removing the garment from the loading form.
  • FIGs.1 A, IB schematically illustrate a garment, in the form of tights, constituted by a knitted article M and an annular band FA, that are knitted separately and then joined by the apparatus described herein. More in particular, in Fig.lA the annular band FA and the knitted article M are shown separated from each other, before being sewn, whilst in Fig. IB these two components are shown assembled to form the finished garment I.
  • the annular band FA comprises a first hem 01 and a second hem 02.
  • the knitted article M comprises two leg pieces G and a body C.
  • the body ends with an open edge MA, which shall be joined, namely sewn, to one of the two hems of the annular band FA, and in particular to the first hem 01.
  • a garment I is obtained, with a sewing line LC joining the open edge MA of the body G to the hem 01 of the annular band FA.
  • the letters D and R indicate, for both the annular band A and the knitted article M, the right side and the reverse side, i.e. the surface (D) that shall remain outside and the surface (R) that shall remain inside when the garment I is worn.
  • the sewing line LC shall be done so that the seam is inside the garment I.
  • the garment I schematically shown in Fig.l is only an example, and other garments can be manufactured with the method and the apparatus disclosed herein, for example garment with leg pieces significantly shorter than those illustrated in Fig.1.
  • the apparatus 1 for sewing the annular band FA and the knitted article M together comprises two main parts, constituted by a loading station 3 configured to load annular bands onto loading forms, and a moving member 5, onto which more loading forms 7, equal to one another, are arranged and transferred in sequence through the loading station 3 and through further stations for the operations of loading the knitted article, sewing it to the band and unloading the garment.
  • the moving member 5 is configured like a carousel adapted to rotate in stepped fashion around a vertical axis A-A.
  • the loading forms 7 are moved by a different moving member, for example a flexible endless conveyor.
  • the loading station 3 for loading the annular bands is represented only schematically in Fig.2, and has been omitted in Figs.3A, 3B.
  • the details of the loading station 3, as well as the operation thereof, are illustrated in Figs.4 to 16.
  • the loading station 3 comprises a bearing structure 9 arranged radially outside the carousel 5.
  • a storage space 11 is provided on the bearing structure 9 for storing stacks of annular bands FA (Figs.10-13).
  • the stacks are adjacent to one another, to increase the capacity of the storage space 11.
  • On the bearing structure 9 a slide 13 is provided, which carries a pick-up device 15, adapted to take individual annular bands FA from the storage space 11 and to transfer them to a stretching device, described below, which loads the annular bands FA onto the respective loading forms 7.
  • the reference number 17 indicates a guide, along which the slide 13 is movable according to the double arrow P3. The movement according to fl3 allows taking annular bands FA from one or the other of more stacks P arranged in the storage space 11 and transferring the individual bands FA, taken by the pick-up device, to the stretching device.
  • a second guide 19 is fastened, along which a stretching device 21 and a pressure member 23 are movable, independently of each other, according to the double arrows f21 and f23. Furthermore, the stretching device 21 is rotatable around a vertical axis (D-D, see Fig.19), orthogonal to the horizontal guide 19, as schematically represented in Figs.5, 9, 15 and 16 by the double arrow f21x. Details of the stretching device 21 and of the pressure member 23 will be described below. [0028] The pick-up device 15 is shown in details in Figs.4, 6, 7, 8, 8A and 8B.
  • the pick-up device 15 comprises an engaging member 25, adapted to engage individual annular bands FA from the storage space 11, and a pair of motorized positioning rollers 27, which receive the annular bands FA from the engaging member 25 and transfer them to the stretching device 21 as described below.
  • the positioning rollers 27 are adapted to rotate in concordant direction, each around the respective horizontal axis B-B.
  • each positioning roller 27 is driven into rotation by a respective motor, for example typically an electronically controlled electric motor, indicated with the reference number 29.
  • the two positioning rollers 27 are movable along the direction f27x so as to move towards and away from each other, thus changing the mutual center-to-center distance.
  • the rollers 27 are also movable according to the double arrow f27y parallel to the guide 17.
  • the movement according to f27y may be independent of the movement according to P3 of the slide 13, if the rollers 27 are supported independently of the slide 13.
  • the rollers 27 may be for example supported by a slide 31 movable according to f27y along a guide 33 integral to the guide 17 and parallel thereto.
  • the slide 31 carries a guide 35 orthogonal to the guide 33, on which support carriages 37 slide, supporting the rollers 27 and the respective motors 29, to allow the rollers 27 to move according to f27x.
  • the movement of the rollers 27 and of the respective carriages 37 and motors 29 according to f27x is imparted, symmetrically for the two rollers 27, by a pair of linear actuators 38, for example pneumatic cylinder-piston actuators.
  • an actuator is also carried, controlling the movement according to f27x of the carriages 37 and of the respective positioning rollers 27.
  • the slide 31 moves forwards and backwards along the direction fl3 together with the slide 13.
  • the slide 31 also moves according to the double arrow f27y with respect to the slide 13, so that the positioning rollers 27 can translate parallel to the guides 17 and 33 with respect to the slide 13, for purposes that will be explained below.
  • the reference number 39 indicates an actuator controlling the movement according to f27y of the rollers 27, and of the slide 31 carrying them, with respect to the slide 13.
  • the engaging member 25 is carried by the slide 13 and is therefore movable according to the double arrow P3.
  • the engaging member 25 comprises a head 41, vertically movable according to the double arrow f41 by means of a mechanism with rack 41 and pinion 45, wherein the pinion 45 is rotated by an actuator, for example an electric motor 47.
  • the head 43 carries an unwinding reel 51 and a rewinding reel 53 for respectively unwinding and rewinding an adhesive tape 55.
  • the reference number 49 indicates a motor driving the rewinding reel 53 into rotation.
  • the path of the adhesive tape 55 extends around two lower guide rollers 57 of small dimensions.
  • the segment of adhesive tape 55 comprised between the lower guide rollers 57 is used to engage by adhesion the first annular band FA positioned on one of the stacks P stored in the storage space 11, as it will be described with reference to the sequence of Figs.10, 11 and 12.
  • the stretching device 21 and the pressure member 23 mentioned above are illustrated in detail in Figs.9, 15 and 16, where the adjacent members have been removed for the sake of clarity of representation.
  • the unit formed by the stretching device 21 and the pressure member 23 is shown in Figs.9 and 16 from the side of the carousel 5, whilst in Fig.15 it is shown from the opposite side, i.e. from the side of the positioning rollers 27.
  • the stretching device 21 comprises a ring 59, to which stretching elements 61 are fastened.
  • the stretching elements are in the form of fingers 61, connected to the ring 59 through pivoting levers 63.
  • the fingers 61 are arranged in close position.
  • the fingers 61 take a position of maximum reciprocal closeness and are arranged near an axis of the stretching device 21, i.e. an axis of the ring 59.
  • the fingers 61 are moved apart to a mutually spaced position (Figs.9, 15, 16) for stretching an annular band FA arranged on the stretching device 21.
  • the movement of the fingers 59 towards and away from one another is controlled by an actuator 65 (Fig.9) of the stretching device 21.
  • the pressure member 23 comprises a ring 67 that can take a position coaxial with the ring 59 of the stretching device 21.
  • the ring 67 of the pressure member 23 carries a plurality of pushing elements or pads 69 circumferentially arranged around an axis of the ring 67 and radially movable, for example controlled by a plurality of pneumatic cylinder-piston actuators 71 or in other way.
  • an actuator 71 is provided for each pad 69.
  • the loading station 3 described above is used to load individual annular bands FA onto each of the seven loading forms 7 mounted on the carousel 5.
  • the loading forms 7 are preferably equal to one another and one of them is shown alone in Figs.17 and 18.
  • the loading form 7 has a substantially circular extension around a central rotation axis C-C.
  • Each loading form 7 has a disc-shaped portion, from which a preferably approximately cylindrical side wall extends, which externally defines an outer surface 75, also referred to as loading surface 75.
  • the cylindrical wall 73 is interrupted, in two diametrically opposite points, by a pair of recesses or openings 77, which interrupt the loading surface 75.
  • the loading surface 75 has a first border 75.1 and a second border 75.2.
  • the loading form 7 is supported idle, for example through suitable support bearings, on a suction tube 79.
  • the suction tube 79 is fastened to the carousel 5 through a respective upright 81.
  • the reference number 83 indicates a stop device for stopping the loading form 7 to prevent it from rotating around the axis C-C with respect to the suction tube 79.
  • the suction tube 79 has an upper connection 85 internally provided with a perforated sheet or a mesh filter 87.
  • the structure of the loading form 7 and the way in which it is supported idle on the lower end of the tube 79 may be better understood from the isometric view and partial cross-section of Fig.19.
  • an annular band FA is taken by the pick-up device 15 from the storage space 11.
  • the pick-up device 15 is positioned by the slide 13 above the stack P, from which the annular band FA shall be taken.
  • the pick-up device is positioned by keeping the head 41 of the engaging member 15 lifted (Fig.10).
  • the head 41 is lowered until the adhesive tape 55 is pressed by the guide rollers 57 against the upper surface of the annular band FA (Fig.11). In this way, the adhesive tape 55 is pressed by the guide rollers 57 against the outer surface of the annular band FA, making this surface adhere to the adhesive tape 55 in two points spaced from each other.
  • the head 41 is then lifted (Fig.12).
  • the annular band FA adhering to the adhesive tape 55, is lifted together with the head 41 of the engaging member 25 and opens by gravity, thus taking an approximately circular arrangement.
  • the positioning rollers 27 are inserted into the annular band FA, as shown in Fig-13.
  • the positioning rollers 27 are moved away from each another according to the double arrow f27x, for stretching the annular band FA as shown in Fig.14.
  • the two positioning rollers 27 are made rotate in concordant direction by the motors 29, the annular band FA starts to move according to the arrow indicated in Fig.14.
  • the movement may be in clockwise or counterclockwise direction, indifferently.
  • the purpose of this movement is angularly to position the annular band FA with respect to the positioning rollers 27.
  • a mark MX (Fig.14) may be provided, detectable by a sensor 89 (Figs.8 and 13).
  • the movement of the positioning rollers 27 is stopped when the mark MX is in the desired position, detected by the sensor 89, which generates a signal for stopping the motors 29.
  • the achieved angular position allows loading the annular band FA onto the loading form 7 in correct position for the subsequent sewing to the knitted article M.
  • the stretching device 21 is initially in the position where the fingers 61 are retracted, i.e. adjacent to one another in the position of maximum closeness to the axis of the stretching device 21, as shown in Fig.14.
  • the fingers 61 enlarge and the positioning rollers 27 move towards each other again. Consequently, the annular band FA is transferred onto the fingers 61 of the stretching device 21 and is kept in stretched position, being arranged according to a polygonal extension, as shown in Fig.15.
  • the stretching device 21 is spaced from the pressure member 23, which can be positioned around one of the loading forms 7 that, in the meantime, has been brought by the carousel 5 in alignment with the loading station 3.
  • the stretching device 21 In addition to rotating by 180° around the diameter vertical axis D-D, the stretching device 21 is moved towards the pressure member 23, moving along the guide 19, until reaching the position shown in Fig.16.
  • the radial position of the fingers 61 is such that they can enter the space defined inside the ring 67 of the pressure member 23 without interfering therewith.
  • the stretching device 21, the pressure member 23 and the annular band FA are in the position shown in Fig.16.
  • the loading form 7 has been omitted for the sake of clarity of representation.
  • the final position is such that the annular band FA, engaged by the fingers 61 of the stretching device 21, is around the loading surface 75 of the loading form 7, as shown in the cut-away isometric view of Fig.19.
  • the pushing elements or pads 69 are moved by the actuators 71 radially inwards, i.e. towards the axis of the loading form 7, coinciding in this position to the axis of the stretching device 21 and to the axis of the pressure member 23.
  • the pads 69 have been brought to abut against the loading surface 75 of the loading form 7, and press the annular band FA against the loading surface 75, the stretching device 21 moves away from the pressure member 23 and from the loading form 7, thus removing the fingers 61 and allowing the annular band FA, which is made of elastic or stretch fabric, to adhere completely to the loading surface 75 of the loading form 7.
  • the pressure of the pads 69 against the surface 75 of the loading form 7 is sufficient to hold the annular band FA, preventing it from being removed together with the fingers 61 of the stretching device 21. To this end, suitable friction coefficients are adopted for the surface 75 and the pads 69.
  • FIG.20 shows the loading form 7 with the annular band FA loaded thereonto and kept on the loading surface 75 due to the elasticity effect of the same annular band.
  • the loading station 91 for loading the knitted article M will be described below with specific reference to Figs.21 to 25.
  • a suction duct 93 is associated with the loading station 91 for loading the knitted article M; the suction duct 93 has a vertical segment coaxial with the axis A-A of the carousel 5, a horizontal segment and a second vertical segment ending with a suction mouth 95 that interfaces with the connection 85 of each loading form 7 that is in turn in the loading station 91. In this way, it is possible to generate a suction through the loading form 7.
  • the suction duct 93 rotates by an angle around the rotation axis A-A of the carousel 5, so as to follow each loading form 7 for a given angle of the circular trajectory thereof.
  • the angle corresponds, in general, to the angular distance between two consecutive stations of the machine.
  • the suction duct 93 interfaces with the suction tube 79 of each loading form 7, that in turn shall achieve the loading station 91, before having achieved the angular position where the knitted article M is loaded onto the loading form 7.
  • This angular position is illustrated in the plan view of Fig.2 and indicated with the reference number 91.
  • the suction duct 93 rotates in counterclockwise direction, for example, up to the position of the loading form 7 arranged directly upstream of the form that in Fig.2 is shown in the loading station 91, i.e. up to the position 90 shown in Fig.2.
  • a blocking pad 97 is associated, radially movable under the control of an actuator 99, for example a cylinder-piston actuator, having the function of blocking the annular band FA that has been previously loaded onto the loading form 7, thus preventing the band from accidentally moving whilst the knitted article M is loaded.
  • an actuator 99 for example a cylinder-piston actuator
  • the blocking pad 97 is movable around the axis A-A integrally with the suction duct 93, so as to follow the reciprocating rotation movement of the duct from the neutral station 90 to the loading station 91 for loading the knitted article M.
  • the rotation movement around the axis A-A is imparted to the suction duct 93 and the blocking pad 97 by a linear actuator, for example a cylinder-piston actuator 101.
  • a linear actuator 101 is provided for bringing every time the duct 93 from the loading station 91 to the neutral station 90 again.
  • Fig.22 shows the action of the blocking pad when it is activated.
  • the blocking pad presses against the first border 75.1 of the loading surface 75 keeping by friction the annular band FA in the correct position on the loading form 7.
  • the suction mouth 95 has been lowered by an actuator 103 until to co-act with the connection 85 of the suction tube 79 associated with the loading form 7 that is in the loading station 91.
  • the lifting and lowering movement of the suction mouth 95 allows selectively to interface the suction duct 93 with the suction tube 79 and to release the suction duct 93 from the suction tube 79 to allow the respective loading form 7 to move up to the following station.
  • the loading form 7 has a central suction port 105 connected to the suction tube 79 and the suction duct 93.
  • the operator inserts the leg pieces G of the knitted article M into the central suction port 105 and makes the whole knitted article M enter into the suction tube 79, except for the body C.
  • the grid or mesh filter 87 prevents the knitted article M from exiting from the side which rotates integrally with the loading form 7 together with the carousel 5.
  • FIG.25 shows a cross-section of the loading form 7 in the loading station 91 with the annular band FA and the knitted article M loaded onto the loading form 7.
  • the cross-section has been cut away according to a vertical plane containing the axis C-C of the loading form 7.
  • a gripping unit 109 is provided, which co-acts with the loading form 7 that is in turn positioned in the sewing station 107.
  • the function of the gripping unit 109 is to engage the loading form 7 and to rotate it, keeping the knitted article M and the annular band FA in position on the loading form during sewing.
  • the rotation movement of the loading form 7 allows to sew, through a sewing machine 111, the hem 01 of the annular band FA along the open edge MA of the knitted article M.
  • the gripping unit 109 comprises a dragging head 113, supported rotatable on a bearing structure 115.
  • E-E indicates the horizontal rotation axis of the dragging head 113.
  • the dragging head 113 comprises a plurality of sectors or pliers 117 arranged around the rotation axis E-E and activated by actuators 119, for example pneumatic cylinder-piston actuators, moving the pliers 117 in radial direction towards the axis E- E.
  • the dragging head 113 is supported idle through bearings 121 and is driven into rotation by a motor 123 through a belt 125, to rotate around the axis E-E (see in particular Fig.28).
  • a rotating joint 127 is provided to pneumatically feed the actuators 119 when the dragging head 113 rotates.
  • the dragging head is provided with a movement in radial direction with respect to the axis A-A according to the double arrow fl 13, controlled by an actuator 131 that controls the movement of a slide 133, on which the dragging head 113 and the respective motor 123 are supported.
  • FIG.30(A) the loading form 7 with the annular band FA and the knitted article M has been aligned with the dragging head 113 in the sewing station 107.
  • the sewing machine 111 is in front of the dragging head 113.
  • the dragging head 113 is moved radially towards the rotation axis A-A of the carousel 5 until the pliers 117 surround the loading form 7 and the sewing machine 111 is translated radially outwards and moved towards the loading form 7, see Fig.30(B).
  • Fig.30(C) a further radial inward movement of the dragging head 113 is shown, for making the annular band FA and the body of the knitted article M slide towards the axis A-A so as to increase, if necessary, the fabric portion of the annular band FA and of the knitted article M projecting from the first border 75.1 of the loading surface for facilitating sewing.
  • the sewing machine 111 is also further moved towards the loading form 7.
  • FIG.30(E) shows the relative position of the various members in the sewing station 107 during sewing. Sewing is performed by rotating the dragging head 113 around the axis E-E by means of the motor 123.
  • the dragging head 113 drives the loading form 7, with the annular band FA and the knitted article M loaded thereon, into rotation with respect to the sewing machine 111.
  • the machine 111 performs sewing.
  • the loading form 7, that up to now has been prevented from rotating by the actuator 83 may be freed to rotate idle around the axis of the same loading form.
  • Fig.30(F) the sewing machine moves away to allow cutting the chain and rotating and correctly phasing the loading form 7 for the subsequent operations.
  • Fig.30(G) the pliers 117 of the dragging head 113 open, after the loading form 7 has been locked again by the actuator 83to prevent rotation thereof.
  • Fig.31 is an isometric view of the unloading station 135 with a loading form 7 positioned therein.
  • Fig.32(B) is a view according to a vertical plane containing the rotation axis A-A of the carousel 5.
  • Fig.32(A) shows a view according to a plane orthogonal to the plane of the view of Fig.32(B), with some components of the unloading station 135 omitted for the sake of simplicity of representation.
  • the sequence shown in Figs.32(A)-32(S) shows the operations performed in the unloading station 135 and will be described below.
  • the unloading station 135 comprises a bearing structure 137, on which members are carried, which are intended to engage the garment I loaded onto the loading form 7 and comprising the annular band FA and the knitted article M, and to remove the garment I from the loading form 7.
  • two removing members 139 are mounted for removing the knitted article M with the elastic band FA sewn thereto.
  • the two removing members are constituted by, or comprise, respective two pairs of unloading fingers 139.
  • reference number 139 will specifically indicate the two pairs of unloading fingers.
  • These pairs are movable with respect to each other in horizontal direction and are part of two removing members, to move towards and away from each other.
  • the fingers are movable along a crossbar 141 carried by the bearing structure 137, to which guides 142 are fastened for the sliding of carriages 143, onto which the two pairs of fingers 139 are mounted.
  • Actuators 145 for example pneumatic cylinder-piston actuators, control the movement of the two carriages 143 towards and away from each other, and therefore the movement of the two pairs of fingers 139 in direction P39.
  • a pad 147 is hinged, co-acting with the respective pair of fingers 139.
  • Each pad is controlled by an actuator 149, for example a pneumatic cylinder-piston actuator, carried by the respective carriage 143, to push against the pair of fingers 139 or to move away therefrom.
  • the crossbar 141 is carried by a slide 151 movable along a guide 153.
  • the double arrow fl 51 indicates the movement of the slide 151 in a direction orthogonal to the crossbar 141 and radial with respect to the rotation axis A-A of the carousel 5.
  • the movement of the slide 151 is controlled by a motor 155 fastened to the bearing structure 137.
  • On the bearing structure 137 a pair of unloading rollers 157 is carried, which are parallel to each other and have horizontal axes.
  • the unloading rollers 157 are supported by a crossbar 159 carried by a vertical column 161 with axis F-F.
  • FIG.32(A) and 32(B) show two views of the unloading station 135 and of the loading form 7 positioned thereinside.
  • the mechanical structures associate with the loading form 7 have been omitted, as well as the unloading rollers 157 and the respective bearing structure.
  • the fingers 139 and the pads 147 are in spread apart position and outside the loading form 7, i.e. in a position of greater distance from the axis A-A than the loading form 7. This spaced position allows inserting the loading form 7 into the unloading station 135.
  • the slide 151 is translated towards the rotation axis A-A of the carousel 5 up to bring the fingers 139 and the pads 147 in a position comprised between the loading form 7 and the rotation axis A-A of the carousel 5, i.e. behind the loading form 7, as shown in Fig.32(C).
  • the carriages 143 move towards each other, thus moving the two pairs of fingers 139 towards each other, whilst the pads 147 are in spaced position with respect to the respective fingers 139.
  • the fingers 139 are positioned inside a cylindrical surface constituting an ideal extension of the loading surface 75 of the loading form 7, whilst the pads 147 are outside this cylindrical surface.
  • Fig.32(E) the slide 153 is translated in opposite direction, until to bring the fingers 139 inside the cylindrical wall 73 of the loading form 7, whilst the pads 147 are positioned laterally outside the cylindrical wall 73.
  • the angular position of the loading form 7 is such that the recesses 77 are aligned with the fingers 139. This allows the fingers 139 to move away from one another through a symmetrical movement of the carriages 143. With this movement, the fingers 139 pass through the recesses or openings 77 and move externally to the cylindrical wall 73 and to the loading surface 75, as shown in Fig.32(F).
  • the pads 147 are still spaced from the fingers 139. This stretching movement of the pairs of fingers 139 make the annular band FA and the body C of the knitted article M stretch on the fingers 139 and partially move away from the loading surface 75 of the loading form 7.
  • the pads 147 are activated by the actuators 149 and pushed against the fingers 139, so that the garment I, formed by the annular band FA and by the knitted article M, is pinched against the two pairs of fingers 139. [0080] At this point, as the fingers 139 and the pads 147 are outside the loading form
  • the slide 151 can be radially translated outwards moving away from the rotation axis A-A of the carousel 5, up to the position shown in Figs. 32(H) and 32(1), spaced from the loading form 7.
  • the garment I is thus unloaded from the loading surface 75 of the loading form 7, whilst the annular band FA and the body C of the knitted article M remain engaged by the fingers 139, pressed against the fingers by the pads 147.
  • the leg pieces G are still inside the suction tube 79.
  • a rod 165 supported rotatably on the bearing structure 133.
  • the rod 165 can rotate around a horizontal axis (arrow fl 65 in Fig.32(J)) controlled by an actuator, for example a pneumatic cylinder-piston actuator 167, to move from a vertical position (Figs.32(A)-32(I)) to a horizontal position
  • an actuator for example a pneumatic cylinder-piston actuator 167
  • Figs.32(N), 32(0) and 32(P) show a further movement of the slide 151, following which the annular band FA and the body C of the knitted article M are brought onto the unloading rollers 157.
  • the pads 147 and the fingers 139 can free the garment I, which is thus transferred to the unloading rollers 157. Unloading is performed by moving the pads 147 away from the fingers 139 and making the fingers rotate around respective vertical axes.
  • Fig.32(Q) the garment I has been transferred onto the unloading rollers 157.
  • the fingers 139 and the pads 147 are moved away from the unloading rollers 157 through a movement towards the rotation axis A-A of the carousel 5, as shown in Fig.32(R), and the unloading rollers 157 rotate around the axis F-F, see Fig. 32(S), so as to present the garment to an operator or to transfer it to conveyors (not shown), which transport it to subsequent processing stations, for example for closing the toe of the leg pieces G.
  • actuator head of the engaging member 25 rack pinion electric motor for moving the head 41 motor for the adhesive tape unwinding reel rewinding reel adhesive tape small guide rollers for guiding the adhesive tape 55 ring of the stretching device 21 fingers of the stretching device 21 levers of the fingers 61 actuator of the stretching device 21 ring of the pressure member 23 pads actuators of the pads 69 cylindrical wall of the loading form 7 loading surface first border of the loading surface second border of the loading surface recesses or openings of the wall 73 suction tube upright supporting the form and the suction tube stop actuator for stopping the rotation of the loading form 7 connection of the suction tube 79 mesh filter sensor reading the band FA neutral station loading station for loading the knitted article M onto the loading form 7 suction duct suction mouth blocking pad actuator of the blocking pad 97 actuator activating the rotation of the suction duct 93 actuator of the suction mouth central suction port of the loading form 7 sewing station gripping unit sewing machine dragging head structure supporting the dragging head 113 pliers or movable sectors of the dragging head 113 actuators of the

Abstract

La présente invention concerne un procédé d'assemblage d'une bande annulaire de tissu (FA) et d'un article tricoté (M) ayant un corps et deux pièces de jambe comprenant une étape consistant à charger la bande annulaire sur une forme de chargement (7) avec une surface de chargement. La bande annulaire est chargée sur la forme de chargement de telle sorte que le premier ourlet de la bande annulaire se trouve à proximité du premier bord de la surface de chargement. Ensuite, une partie du corps de l'article tricoté (M) est chargé autour de la forme de chargement (7) au-dessus de la bande annulaire (FA), le bord ouvert du corps étant aligné avec le premier ourlet (O1) de la bande annulaire (FA). Enfin, le premier ourlet (O1) de la bande annulaire (FA) et le bord ouvert du corps sont assemblés l'un à l'autre et le vêtement comprenant l'article tricoté avec la bande annulaire cousue à celui-ci est retiré de la forme de chargement (7).
EP21709748.4A 2020-03-16 2021-03-10 Appareil et procédé d'assemblage d'une bande annulaire à un article tricoté comprenant un corps Pending EP4121588A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102020000005536A IT202000005536A1 (it) 2020-03-16 2020-03-16 Apparato e metodo per unire tra loro una fascia anulare e un manufatto tessile comprendente un corpino
PCT/EP2021/056117 WO2021185659A1 (fr) 2020-03-16 2021-03-10 Appareil et procédé d'assemblage d'une bande annulaire à un article tricoté comprenant un corps

Publications (1)

Publication Number Publication Date
EP4121588A1 true EP4121588A1 (fr) 2023-01-25

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ID=70978344

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21709748.4A Pending EP4121588A1 (fr) 2020-03-16 2021-03-10 Appareil et procédé d'assemblage d'une bande annulaire à un article tricoté comprenant un corps

Country Status (5)

Country Link
EP (1) EP4121588A1 (fr)
JP (1) JP2023517719A (fr)
CN (1) CN115443355A (fr)
IT (1) IT202000005536A1 (fr)
WO (1) WO2021185659A1 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5743202A (en) * 1993-10-04 1998-04-28 Atlanta Attachment Company Elastic waistband attachment system
US5562060A (en) * 1993-10-04 1996-10-08 Atlanta Attachment Company Waist band attachment system
US5570648A (en) * 1994-12-13 1996-11-05 Design Technology Corporation Waist band-forming apparatus and method
US6055921A (en) * 1998-02-19 2000-05-02 Atlanta Attachment Company Waistband attachment system
DE202007011790U1 (de) * 2007-08-23 2009-01-02 Dürkopp Adler AG Nähautomat
JP5142771B2 (ja) * 2008-03-12 2013-02-13 Ｊｕｋｉ株式会社 ベルトループの供給装置
ITFI20130247A1 (it) * 2013-10-17 2015-04-18 Nerino Grassi "metodo e macchina per la produzione di un indumento a maglia con corpino e gambali, e relativo prodotto ottenuto"
PL3277874T3 (pl) 2015-04-03 2019-07-31 Santoni S.P.A. Sposób i urządzenie do mocowania paska tkaninowego na wyrobie dzianinowym

Also Published As

Publication number Publication date
CN115443355A (zh) 2022-12-06
IT202000005536A1 (it) 2021-09-16
WO2021185659A1 (fr) 2021-09-23
JP2023517719A (ja) 2023-04-26

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