EP2316993A1 - Machine pour coudre des pièces tubulaires de tissu en série - Google Patents

Machine pour coudre des pièces tubulaires de tissu en série Download PDF

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Publication number
EP2316993A1
EP2316993A1 EP09425432A EP09425432A EP2316993A1 EP 2316993 A1 EP2316993 A1 EP 2316993A1 EP 09425432 A EP09425432 A EP 09425432A EP 09425432 A EP09425432 A EP 09425432A EP 2316993 A1 EP2316993 A1 EP 2316993A1
Authority
EP
European Patent Office
Prior art keywords
fabric
machine according
movement element
machine
tubular pieces
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.)
Withdrawn
Application number
EP09425432A
Other languages
German (de)
English (en)
Inventor
Alberto Pugi
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.)
Pugi Group Srl
Original Assignee
Pugi Group Srl
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 Pugi Group Srl filed Critical Pugi Group Srl
Priority to EP09425432A priority Critical patent/EP2316993A1/fr
Publication of EP2316993A1 publication Critical patent/EP2316993A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B35/00—Work-feeding or -handling elements not otherwise provided for
    • D05B35/10—Edge guides
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B33/00—Devices incorporated in sewing machines for supplying or removing the work

Definitions

  • This invention relates to a machine for stitching tubular pieces of fabric in series.
  • This invention is advantageously applied for the serial connection of tubular pieces of fabric in preparation for subsequent processing of the pieces, such as, for example, dyeing.
  • piece or “piece of fabric” refers to a length of fabric which may be gathered in rolls or in superposed folds or in any other way which allows its effective storage.
  • Prior art machines for stitching tubular pieces of fabric in series use stitching to connect a final end edge (called the tail) of one piece of fabric to a starting end edge (called the head) of the next tubular piece of fabric.
  • edges are also referred to without distinction as ends.
  • Such machines comprise a conveyor belt positioned transversally to a direction of feed for the pieces of fabric to be joined and on which the final edge and the starting edge of the pieces of fabric to be joined are positioned.
  • the conveyor belt is supported by at least two rollers located in opposite positions and at least one of which is connected to a motor.
  • a sewing machine is positioned along the conveyor belt, on a respective structural track, for stitching said edges together.
  • the edges of the pieces of fabric are positioned on the belt in such a way that they project so that they can be fed to the sewing machine.
  • the conveyor belt supporting rollers are mounted on respective sliding carriages for varying their relative position depending on the diameter of the pieces of fabric to be connected. In that way, the supporting rollers are spaced from each other in such a way that the pieces of fabric to be joined fit perfectly on the conveyor belt and maintain the tension needed for the stitching operation.
  • the pieces of fabric may move in such a way that the stitching is decidedly irregular or defective or even interrupted.
  • the operator must correct the relative position of the pieces of fabric (even relative to the sewing machine position) where necessary and said correction is made manually.
  • the technical purpose which forms the basis of this invention is to propose a machine for stitching tubular pieces of fabric in series which overcomes the above-mentioned disadvantages of the prior art.
  • this invention has for an aim to provide a machine for stitching tubular pieces of fabric in series which can guarantee constant safe conditions for an operator.
  • This invention also has for an aim to propose a machine for stitching tubular pieces of fabric in series which is capable of continuous, precision stitching.
  • the numeral 1 denotes as a whole a machine for stitching tubular pieces of fabric in series.
  • switching tubular pieces of fabric in series refers to the connection of a final end edge BF (or, in other words, a tail edge) of a tubular piece S of fabric to a starting end edge BI (or, in other words, a head edge) of the next tubular piece S of fabric.
  • the tubular pieces S of fabric to be connected may be wound on themselves and housed in a suitable machine 1 receiving compartment (not illustrated).
  • the machine 1 comprises a movement element 2 which acts on the tubular pieces S to be connected and a sewing machine 3 of the known type which is located along the movement element 2 for stitching together the tubular pieces S of fabric along their respective end edges or ends BF, BI.
  • tubular pieces S are fitted on the movement element in such a way that the final end edge or end BF of one tubular piece S of fabric is substantially superposed on the starting end edge or end BI of the next tubular piece S.
  • the movement element 2 imparts to the tubular pieces S a circular movement for feeding the respective final and starting end edges or ends BF, BI to the sewing machine 3 along a feed path "P".
  • the movement element 2 comprises at least one conveyor belt 4 which supports and moves the tubular pieces S to be connected.
  • the movement element 2 comprises a pair of carriages 5 which support the conveyor belt 4 and allow it to move.
  • the carriages 5 are positioned on opposite sides of the sewing machine 3 and form the feed path "P" between them, as described in more detail below.
  • the movement element 2 comprises a single conveyor belt 4 supported by both carriages 5, alongside and close to the sewing machine 3.
  • the conveyor belt 4, supported between the carriages 5, remains straight at least between the carriages 5 and forms the feed path "P" since the tubular pieces S are positioned and moved on the conveyor belt at their final and starting end edges BF, BI.
  • the movement element 2 comprises two conveyor belts 4 which are separate from each other and each connected to a respective carriage 5.
  • each carriage 5 comprises a frame 6 and a supporting body 7 connected to the frame 6 and on which the respective conveyor belt 4 is positioned.
  • tubular pieces S are positioned on top of the two conveyor belts 4 and supported in such a way that they lie suspended between the carriages 5 so that they extend substantially straight between one carriage 5 and the other.
  • Each carriage 5 also comprises a motor 8 which is operatively connected to the respective conveyor belt 4 and positioned on the opposite side of the frame 6 to the supporting body 7.
  • a transmission element 9 transfers motion from the motor 8 to the supporting body 7 and from there to the conveyor belt 4.
  • the transmission element 9 comprises a shaft 10 positioned along the frame 6 between the motor 8 and the supporting body 7.
  • the supporting body 7 comprises an upper portion 7a which substantially has the shape of a semicylinder.
  • the edges or ends BF, BI of the tubular pieces S of fabric are rested in contact with said portion.
  • the supporting body 7 also comprises a lower portion 7b substantially having the shape of a parallelepiped.
  • the carriages 5 can move towards and/or away from each other to vary the distance between them and adapt to different diameters of the tubular pieces S.
  • the carriages 5 can move along a straight guide 11.
  • the frame 6 of each carriage 5 is slidably connected to the guide 11.
  • the machine 1 also comprises a positioning device 12 connected to the movement element 2 for holding the edges or ends BF, BI of the tubular pieces S of fabric in such a way that they adhere to the movement element 2. More precisely, in practice, the positioning device 12 is in contact with the movement element 2 in such a way that the tubular pieces S of fabric lie interposed between the movement element 2 and the positioning device 12.
  • the positioning device 12 holds the tubular edges or ends BF, BI in position on the conveyor belts 4, preventing them from coming out as they rotate.
  • the positioning device 12 comprises at least one pair of tensioning elements 13 in contact with the movement element 2.
  • each tensioning element 13 is in contact with a respective carriage 5. More precisely, each tensioning element 13 rests on a respective conveyor belt 4.
  • the feed path "P" is therefore formed between the tensioning elements 13. Moreover, the sewing machine 3 is therefore positioned between the tensioning elements 13.
  • Each tensioning element 13 comprises a respective roller (or wheel) 14 which rests on the movement element 2 and a supporting arm 15 to which the roller 14 is hinged. It should be noticed that each roller 14 applies a contact force against the movement element 2 which holds the tubular edges or ends BF, BI of fabric securely against the movement element 2.
  • Said contact force can be varied and adjusted according to the type of fabric used to make the tubular pieces S.
  • the positioning device 12 comprises an actuator 16 connected to the supporting arm 15 for acting on the roller 14 and generating the contact force.
  • the actuator 16 has a first end connected to the carriage 5 frame 6 and a second end, opposite the first end, connected to a central portion of the supporting arm 15.
  • the actuator 16 may, for example, be hydraulic, pneumatic, electric or of another type.
  • the actuator 16 also has another function.
  • Each tensioning element 13 can move between a first position in which it is raised and distant from the conveyor belt 4, allowing the tubular ends of the pieces S to be positioned on the movement element 2, and a second position in which it is lowered and rests on the movement element 2 in order to keep the tubular ends taut.
  • Each roller 14 has a contact surface 14a acting directly on the tubular ends BF, BI of the pieces S.
  • Said contact surface 14a may be smooth, ridged, knurled or embossed, depending on the application for which the rollers 14 are intended.
  • the contact surface 14a, or the entire roller 14 is made, for example, of metal such as steel or plastic - polymeric material such as rubber.
  • Said plastic - polymeric material may have a degree of hardness which varies according to the type of fabric used to make the tubular pieces S to be connected.
  • the contact surface 14a has a plurality of projections and/or recesses which increase the actual surface area for contact between the roller 14 and the tubular ends BF, BI of the pieces S in such a way as to make the grip more effective.
  • the roller 14 comprises a plurality of needles 17 extending radially away from a cylindrical surface 14b of the roller 14. In that way, it is impossible to unambiguously define a contact surface, since the needles 17 penetrate the tubular pieces S to stably maintain the relative position between them and between the pieces and the conveyor belts 4. As shown in Figures 3 and 3a , the needles 17 are arranged in straight rows along the entire circular extension of the roller 14.
  • each conveyor belt 4 comprises a pierced portion 4a extending along the entire conveyor belt 4.
  • the pierced portion 4a of each conveyor belt 4 is positioned at the respective roller 14 equipped with the needles 17 so that the latter fit in the holes in the pierced portion 4a without damaging the conveyor belt 4 and thus increase the tensioning element 13 grip on the edges or ends BI, BF of the tubular pieces S.
  • each tensioning element 13 comprises two supporting pulleys 18 between which an auxiliary belt 19 extends.
  • the supporting pulleys 18 pivot on a supporting plate 20 which is in turn connected to the supporting arm 15.
  • the auxiliary belt 19 is passed over an intermediate roller 21 to keep the auxiliary belt 19 taut.
  • the supporting pulleys 18 and the intermediate roller 21 are preferably idle. In other words, the auxiliary belt 19 is idle.
  • the positioning device 12 comprises a drive element acting on the auxiliary belt 19 for moving it in such a way that it has the same feed speed as the conveyor belt 4 with which it is coupled.
  • each auxiliary belt 19 at least partly covers the conveyor belt 4.
  • each auxiliary belt 19 covers the conveyor belt 4 at the semicylinder-shaped upper portion 7a of the supporting structure 7.
  • the tensioning elements 13 on the two carriages 5 may have the same shape. Alternatively, the tensioning elements 13 on the two carriages 5 may have different shapes.
  • tubular pieces S are connected, they are sent towards a folding machine (not illustrated) connected downstream of the stitching machine 1 according to this invention.
  • the invention achieves the preset aims.
  • the positioning element guarantees that the position of one tubular piece relative to the other remains unchanged even during the circular movement which feeds the end edges or ends to the sewing machine. Moreover, the position between the tubular pieces and the sewing machine is also stably maintained.
  • the positioning device allows continuous, precise stitching.
  • Said reliability allows a reduction in the width of the end edges intended for stitching, thus limiting possible wasted fabric.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP09425432A 2009-10-29 2009-10-29 Machine pour coudre des pièces tubulaires de tissu en série Withdrawn EP2316993A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09425432A EP2316993A1 (fr) 2009-10-29 2009-10-29 Machine pour coudre des pièces tubulaires de tissu en série

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09425432A EP2316993A1 (fr) 2009-10-29 2009-10-29 Machine pour coudre des pièces tubulaires de tissu en série

Publications (1)

Publication Number Publication Date
EP2316993A1 true EP2316993A1 (fr) 2011-05-04

Family

ID=42112215

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09425432A Withdrawn EP2316993A1 (fr) 2009-10-29 2009-10-29 Machine pour coudre des pièces tubulaires de tissu en série

Country Status (1)

Country Link
EP (1) EP2316993A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201900003877A1 (it) * 2019-03-18 2020-09-18 Pugi Group S R L Macchina perfezionata per la cucitura in serie di spezzoni tubolari.

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB502223A (fr) * 1937-04-30 1939-03-14 Georg Spiess
DE936715C (de) * 1950-12-10 1955-12-22 Linde Eismasch Ag Verfahren zum Reinigen von Gasen durch Tiefkuehlung
DE2006238A1 (en) * 1970-02-12 1971-08-19 Texmato Gesellschaft für Automatisierung in der Textilindustrie GmbH & Co, 4500 Osnabrück Seaming textile sheets
JPS61130149A (ja) * 1984-11-28 1986-06-18 Ricoh Co Ltd 製本装置
DE3920439A1 (de) * 1988-09-15 1990-03-22 Trikotex Veb Vorrichtung zum automatischen vernaehen von gestrickschlauch
DE4230163A1 (de) * 1991-09-11 1993-03-18 Yamato Sewing Machine Mfg Verfahren und vorrichtung zum steuern der randposition eines textilstuecks
US5370072A (en) * 1993-09-17 1994-12-06 Union Special Corporation Automatic alignment of material and positioning at the stitch forming location
WO2000050685A1 (fr) * 1999-02-23 2000-08-31 Texma S.R.L. Machine de couture automatique d'extremites de pieces de tissu tubulaires

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB502223A (fr) * 1937-04-30 1939-03-14 Georg Spiess
DE936715C (de) * 1950-12-10 1955-12-22 Linde Eismasch Ag Verfahren zum Reinigen von Gasen durch Tiefkuehlung
DE2006238A1 (en) * 1970-02-12 1971-08-19 Texmato Gesellschaft für Automatisierung in der Textilindustrie GmbH & Co, 4500 Osnabrück Seaming textile sheets
JPS61130149A (ja) * 1984-11-28 1986-06-18 Ricoh Co Ltd 製本装置
DE3920439A1 (de) * 1988-09-15 1990-03-22 Trikotex Veb Vorrichtung zum automatischen vernaehen von gestrickschlauch
DE4230163A1 (de) * 1991-09-11 1993-03-18 Yamato Sewing Machine Mfg Verfahren und vorrichtung zum steuern der randposition eines textilstuecks
US5370072A (en) * 1993-09-17 1994-12-06 Union Special Corporation Automatic alignment of material and positioning at the stitch forming location
WO2000050685A1 (fr) * 1999-02-23 2000-08-31 Texma S.R.L. Machine de couture automatique d'extremites de pieces de tissu tubulaires

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201900003877A1 (it) * 2019-03-18 2020-09-18 Pugi Group S R L Macchina perfezionata per la cucitura in serie di spezzoni tubolari.

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