EP4540451A1 - Installation de couture - Google Patents

Installation de couture

Info

Publication number
EP4540451A1
EP4540451A1 EP23730831.7A EP23730831A EP4540451A1 EP 4540451 A1 EP4540451 A1 EP 4540451A1 EP 23730831 A EP23730831 A EP 23730831A EP 4540451 A1 EP4540451 A1 EP 4540451A1
Authority
EP
European Patent Office
Prior art keywords
sewing
thread
gripper
capsule
looper
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
EP23730831.7A
Other languages
German (de)
English (en)
Inventor
Harald Kallenbach
Stefan Samstag
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.)
Pfaff Industriesysteme und Maschinen GmbH
Original Assignee
Pfaff Industriesysteme und Maschinen GmbH
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 Pfaff Industriesysteme und Maschinen GmbH filed Critical Pfaff Industriesysteme und Maschinen GmbH
Publication of EP4540451A1 publication Critical patent/EP4540451A1/fr
Pending legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B57/00—Loop takers, e.g. loopers
    • D05B57/08—Loop takers, e.g. loopers for lock-stitch sewing machines
    • D05B57/10—Shuttles
    • D05B57/14—Shuttles with rotary hooks
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B19/00—Program-controlled sewing machines
    • D05B19/02—Sewing machines having electronic memory or microprocessor control unit
    • D05B19/12—Sewing machines having electronic memory or microprocessor control unit characterised by control of operation of machine
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B57/00—Loop takers, e.g. loopers
    • D05B57/26—Bobbin holders or casings; Bobbin holder or case guards; Bobbin discharge devices
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B65/00—Devices for severing the needle or lower thread
    • D05B65/02—Devices for severing the needle or lower thread controlled by the sewing mechanisms
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B75/00—Frames, stands, tables, or other furniture adapted to carry sewing machines

Definitions

  • the invention relates to a sewing system.
  • EP 2 050 853 A1 discloses a sewing machine and a gripper system for a sewing machine.
  • DE 10 2018 205 835 Al discloses a sewing machine.
  • DE 41 28 336 CI discloses a sewing machine for stationary, large-area sewn material.
  • DE 2 247 050 A discloses a thread feeder for sewing machines, preferably for multi-needle lockstitch machines.
  • a capsule fan known, for example, from DE 100 25 851 CI and DE 32 44 946 CI, so that it can also interact with a very large gripper with a correspondingly large bobbin thread supply.
  • An example of a large gripper is known from DE 20 2013 005 112 Ul.
  • the increased free space for the thread between the hook capsule and the capsule holding component via the capsule lifter reduces thread friction in the sewing material support area on the hook side during sewing. This reduced thread friction enables the use of thick threads with NM 20 or even smaller.
  • Such thick upper or lower threads can then be sewn at a sewing speed of more than 2000 stitches per minute, for example at 2000 stitches per minute, at 2200 stitches per minute, at 2500 stitches per minute or even at 2800 stitches per minute.
  • the sewing lower part can be designed in such a way that a semi-automatic or fully automatic bobbin changing system can be used for the correspondingly automated exchange of the lower thread supply. This further increases the overall effectiveness of the sewing system.
  • the sewing system can be used to produce seams for the automotive industry, for example dashboard, vehicle seat, belt or airbag seams.
  • a C-frame or another frame geometry can be used to hold the sewing upper part and the sewing lower part of the sewing machine of the sewing system.
  • An up and down movement of the needle bar can take place along a z coordinate of a sewing system coordinate system.
  • the upper sewing part can be combined with the lower sewing part and/or the sewing material support plate along the x and/or along the y coordinate
  • Correspondingly controlled drives can be designed to be movable.
  • the sewing system can therefore be designed with a movable sewing machine and/or with a movable material support plate.
  • the sewing machine can be designed with monitoring of a remaining thread quantity for the upper thread and/or the lower thread.
  • the sewing machine can be designed with at least one vibration sensor for monitoring maintenance requirements, in particular of bearings of the sewing system, in particular of the upper sewing part and/or the lower sewing part.
  • the sewing upper part can be designed with a needle cooling system.
  • a thread cutting device leads to a clean seam appearance.
  • a thread cutting device of the type known from EP 2 300 654 Bl can be used.
  • a projection length achieved with the thread cutting device can be 15 mm, but can also be smaller, for example 12 mm or 10 mm.
  • An initial thread and/or an end thread of the seam formed can be cut off.
  • a thread finger can interact with the thread cutting device when cutting thread. After a sewing stop, a corresponding process sequence can include grasping the thread to be cut with the thread finger for thread pulling and subsequently cutting the thread captured after thread pulling with the thread cutting device.
  • An embodiment of the thread cutting device according to claim 3 has proven itself for producing the shortest possible supernatant within a reproducible process sequence.
  • the cutting knife can be guided over a curve or backdrop.
  • a narrow housing head design of the sewing upper part according to claim 4 enables several sewing machines to work together side by side in parallel within the sewing system to process a large sewing field.
  • the width of the housing head of the sewing top can be 280 mm, can be 250 mm and can even be smaller. This width is usually at least 200 mm.
  • Assembly of the upper thread supply according to claim 5 enables a particularly small width of the upper sewing part in the operational version.
  • the upper thread supply can then be designed to be aligned with the housing arm section.
  • a thread tensioning device enables good seam pattern control.
  • the thread tension can be adjusted differently for individual seam sections of a seam to be produced as a whole.
  • a presser foot according to claim 7 allows the sewing process to be adapted to different sewing material conditions.
  • the presser foot adjustment can be possible individually for seam sections of a total seam to be created, so that corresponding section-dependent requirements can be taken into account.
  • Fig. 1 shows schematically main components of a CNC-controlled sewing system with a sewing machine, having an upper sewing part and a sewing lower part interacting with it in a side view;
  • Fig. 2 is a perspective view of a sewing upper part for use in the sewing system according to Fig. 1;
  • Fig. 3 is a perspective view of a sewing base for use in the sewing system according to Fig. 1;
  • FIG. 4 shows a front view of details of the lower sewing part including a controlled, drivable capsule fan
  • FIG. 5 shows a view of the lower sewing part obliquely from above, a gripper capsule of a gripper relative to a capsule holding component in a neutral position;
  • FIG. 6 shows, in a representation similar to FIG. 5, the gripper capsule in a position that is lifted compared to the neutral position due to the action of a capsule ventilator, which is also referred to as the open position;
  • Fig. 7 is a side view of an embodiment of the sewing upper part with a thread finger for pulling back an upper thread after sewing a seam and before thread cutting.
  • a sewing system 1 has a CNC control 2 shown schematically in FIG. 1 and a sewing machine 3.
  • the sewing machine 3 has an upper sewing part 4 and a sewing lower part 5.
  • the sewing system 1 also has a sewing support plate 6, which specifies a sewing material support in a sewing material support level 7.
  • the sewing upper part 4 and the sewing lower part 5 of the sewing machine 3 are mounted on a frame 8 of the sewing machine 3 of the sewing system 1.
  • a Cartesian xyz coordinate system is used below.
  • the x-axis runs perpendicular to the plane of the drawing.
  • the y-axis runs horizontally to the right in FIG.
  • the z-axis runs vertically upwards in FIG.
  • the frame 8 is roughly C-shaped so that a usable sewing surface in the xy plane can have a large extent, particularly along the y direction, which can be larger than 1000 mm x 1000 mm.
  • the material support plate 6 When sewing, the material support plate 6 is displaced relative to the upper sewing part 4 on the one hand and to the lower sewing part 5 on the other hand along the x-direction and/or along the y-direction.
  • this relative displacement can be such that the frame 8 of the sewing machine 3 moves relative to the sewing material support plate 6, i.e. the sewing material support plate 6 is fixed, or that the sewing material support plate 6 moves to the then fixed frame 8 emotional.
  • both the frame 8 and the sewing material support plate 6 can move relative to one another along the x-direction and/or along the y-direction.
  • Fig. 2 shows details of the sewing upper part 4.
  • the sewing upper part 4 has a needle bar 9 which can be moved up and down in a controlled manner along the z direction. Depending on the design of the sewing upper part 4, the needle bar 9 can be used to guide a needle bar held there Sewing needle not shown in FIG. 2 can be cooled.
  • the sewing upper part 4 has an upper thread guide for guiding an upper thread from an upper thread supply 10 in the form of a thread spool towards the needle bar 9. The upper thread is along this upper thread guide in FIG.
  • This upper thread guide includes a thread clamp 11, which is controlled via a clamp drive 12, which can be pneumatic, and which is arranged near the needle bar 9.
  • a thread break sensor 13 can be arranged, which can be designed as an optical sensor. Such a thread break sensor 13 can be used to monitor whether the needle bar 9 is still being fed with upper thread.
  • the upper thread guide also includes a thread lever 14 and a thread tension regulating device 15, with which the thread tension of the upper thread can be specified.
  • a thread tension sensor 16 can be arranged in the area of the thread lever 14, via which the thread tension of the upper thread can be monitored.
  • the movement of the needle bar 9 and the thread lever 14 is driven in a controlled manner via a sewing drive motor 17.
  • a position of sewing tools of the sewing machine 3 can be approached manually via a handwheel 18 of the upper sewing part 4.
  • An axis of rotation of the handwheel 18 runs parallel to the x direction, i.e. perpendicular to a C plane (yz plane) of the frame 8 and also perpendicular to the extension of an arm shaft (extension along the y direction) of the upper sewing part 4, of which Rotary movement of the drive of the needle bar 9 and the thread lever 14 is derived.
  • the sewing upper part 4 can also be equipped with a presser foot, which is not shown in FIG. Such a presser foot is held on a presser foot bar 19.
  • An adjusting drive 20, which is designed as a servo motor or as a pneumatic drive, is used to adjust the height of the presser foot bar 19 along the z-direction.
  • a pneumatic fan drive 21 can be provided to suspend the presser foot bar 19.
  • Another monitoring sensor 22 of the upper sewing part 4 monitors a “top dead center” position of the needle bar 9.
  • the monitoring sensor 22 can therefore be designed as an optical sensor.
  • a vibration sensor 23 To monitor the storage condition of the sewing upper part 4, it can have a vibration sensor 23. As soon as vibrations of the sewing upper part 4 detected by the vibration sensor 23 exceed a tolerance value, a signal can be output to prepare for maintenance of the sewing machine 3.
  • the upper sewing part 4 To monitor a lubricant fill level, in particular an oil fill level, for lubricating moving parts of the upper sewing part 4, the upper sewing part 4 has a fill level sensor 24.
  • An upper thread fill level sensor 25 which can be an optical sensor, is used to monitor the fill level of the upper thread supply 10.
  • the upper thread supply 10 is mounted on a housing head 26 of the upper sewing part 4. This mounting position of the upper thread supply 10 is in an extension of a housing arm section 27 of the upper sewing part 4, which extends along the y-direction and which ends in the housing head 26.
  • the needle bar 9 and the presser foot bar 19 are guided in the housing head 26.
  • the housing head 26 in an operating version including the upper thread supply 10 can have a width in the x dimension, i.e. parallel to the sewing material support plane 7 and perpendicular to the extension dimension y of the housing arm section 27, which is at most 300 mm and can be, for example, 280 mm or 250 mm.
  • the upper thread supply 10 can also be mounted on the frame 8 or arranged next to the housing head 26, as shown in FIGS. 1 and 7.
  • the sewing system 1 also includes a reading device 28, shown schematically in FIG. 2, for an upper thread type, which is provided with the upper thread supply 10.
  • the reading device 28 can be a barcode reader.
  • Fig. 3 shows an embodiment of the sewing lower part 5 of the sewing machine 3 of the sewing system 1.
  • the sewing lower part 5 interacts with the sewing upper part 4 to form seams.
  • the sewing lower part 5 has a controlled, rotatable gripper 30 with a lower thread supply in a gripper spool 31, which is housed in a gripper capsule 32.
  • the gripper 30 has one Gripper tip, which interacts with the sewing needle attached to the needle bar 9 of the upper sewing part 4 to form stitches or seams. In this way, a lockstitch, in particular a double lockstitch, can be created.
  • the gripper 30 can be rotated about an axis of rotation 33 running parallel to the y-axis. This axis of rotation 33 runs parallel to the sewing material support 7, i.e. parallel to the xy plane.
  • the receptacle in the hook capsule 32 for the hook bobbin 31 with the bobbin thread supply has an outer diameter, measured perpendicular to the axis of rotation 33, which is larger than 30 mm.
  • a holding web 34 (compare FIGS. 5 and 6) is arranged as a capsule holding component, which is firmly connected to a frame 35 of the sewing lower part 5.
  • the holding web 34 is in engagement with a holding recess 36 of the gripper capsule 32 in such a way that the gripper capsule 32 does not rotate when the gripper 30 rotates about the axis of rotation 33.
  • the holding recess 36 is more extensive than the holding web 34, so that in this circumferential direction, depending on the circumferential position of the holding recess 36 relative to the retaining web 34, there are gaps, i.e. a free space.
  • the sewing lower part 5 has a controlled, drivable capsule lifter 37 (see FIG. 4) for displacing the gripper capsule 32 in the circumferential direction about the axis of rotation 33 between a neutral position, which is shown in FIG. 5, and a lifted position, which is shown in FIG 6 is shown.
  • a lever tip of the capsule fan 37 cooperates with a counter surface of the gripper capsule 32 to displace the gripper capsule 32 in the circumferential direction.
  • the rotary drive of the gripper 30 and also the drive of the capsule fan 37 are derived from a sewing drive 38 of the sewing lower part 5.
  • a stitch length when forming a seam can be between 2 mm and 10 mm.
  • the sewing lower part 5 in turn has a lower thread fill level sensor 39, a monitoring sensor 40 for monitoring an initialization position of a hook tip of the gripper 30, a vibration sensor 41 for monitoring a bearing condition of bearings of the sewing lower part 5 and a lubricant fill level sensor 42, which in its Structure and their mode of operation correspond to the sensors that have already been explained above with reference to the sewing upper part 4.
  • the operating speed can be, for example, 2200, 2400 or even 2500 stitches per minute and can even be higher.
  • the upper thread and/or the lower thread can be a polyamide thread and/or a nylon thread.
  • the upper thread and the lower thread can have different colors.
  • the gripper 30 is attached to the frame 35 of the sewing lower part 5 in such a way that a particularly automatic changing system for changing the gripper spool 31, i.e. the lower thread supply, is possible.
  • the sewing system 1 can be used to produce seams for the automotive industry, for example dashboard, vehicle seat, belt or airbag seams.
  • the sewing lower part 5 also has a thread cutting device 44, components of which are shown in FIGS. 5 and 6.
  • the thread cutting device 44 is used to cut off thread ends of the upper thread or the lower thread that protrude over a seam formed with the sewing machine 3. After cutting by the thread cutting device 44, cut thread ends remain with a protruding length beyond the formed seam of a maximum of 15 mm. This projection length can also be smaller, for example 12 mm or 10 mm be.
  • the thread ends can be a starting thread or an ending thread of the seam.
  • the thread cutting device 44 has a cutting knife 45, the thread catch hook and the cutting edge of which are covered by a counter knife 46 of the thread cutting device 44 in FIGS. 5 and 6.
  • the cutting knife 45 is shown in a cutting position in FIG. 5 and in a neutral position in FIG. 6.
  • the cutting knife 45 is pivoted about a pivot axis running parallel to the z-axis in the direction of the thread path in the area of the holding recess 36, with the thread catch hook capturing the thread or threads to be cut.
  • the detected thread or threads are cut off between the cutting edge of the cutting knife 45 and the counter knife 46.
  • a knife drive is used to drive the cutting knife 45 in a controlled manner, which acts on a drive shaft 47, see FIG. 3, which is a double-acting pneumatic cylinder.
  • the movement of the cutting knife 45 is guided via a curve or backdrop not shown in the drawing.
  • the sewing machine 3 also has a thread finger device 48 with a thread finger 49 (see FIG. 7), which interacts with the thread cutting device 44 for thread cutting.
  • Fig. 7 shows an embodiment of such a thread finger device 48.
  • the thread finger 49 can be moved between the neutral position according to FIG. 7 and a pneumatic drive. a cutting preparation position. In the cutting preparation position, after the sewing machine 3 has stopped sewing, the thread finger 49 pulls the thread to be cut back into a position in which it can be grasped by the cutting knife 45. After this retraction of the thread to be cut via the thread finger 49, the thread is then cut by the thread cutting device 44.
  • the sewing system 1 can also have several pairs, each consisting of an upper sewing part 4 and a sewing lower part 5 that interacts with it to form a seam, i.e. several sewing machines in the manner of the sewing machine 3 explained above.
  • These several sewing machines can each be attached to an assigned frame Type of frame 8 must be mounted.
  • the different frames 8 of these several sewing machines 3 can be displaced relative to one another via individually controllable displacement drives along the x-direction and/or along the y-direction. Particularly in the case of very large sewing fields to be sewn, several sewing machines 3 can then process the sewing field in parallel. This parallel processing is controlled via the CNC control 2 of the sewing system 1.
  • Both a thread tension adjustment via the thread tension control 15 and a foot height adjustment of the presser foot via the adjusting drive 20 can be individually adjusted for each seam section using the CNC control 2.
  • This can take into account different sewing requirements depending on the section, for example a section-dependent stitching of different numbers of layers of sewn material and/or different sewn material thicknesses and/or different stitch geometries.
  • the CNC control 2 is in signal connection with the various drives and the sensors of the sewing system 1, which were explained above.
  • the sewing system 1 has a corresponding data bus system. Signal transmission can take place via real-time Ethernet.
  • An example of this is the Ether CAT protocol.
  • Signal data is forwarded via such an Ethernet system to a production control system of the sewing system 1 for production control, which is also known as a Manufacturing Execution System (MES).
  • MES Manufacturing Execution System

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Sewing Machines And Sewing (AREA)

Abstract

L'invention concerne une installation de couture (1) comprenant une unité de commande CNC (2) et une machine à coudre (3). Cette machine à coudre comprend une plaque de support (6) pour article à coudre, une partie supérieure de couture (4) et une partie inférieure de couture (5). La partie inférieure de couture comprend un crochet rotatif pouvant être entraîné en rotation de manière commandée et une réserve de fil inférieur dans un boîtier de canette. Le crochet rotatif est monté rotatif autour d'un axe qui s'étend parallèlement au support d'article à coudre. Le crochet rotatif présente un diamètre d'au moins 30 mm. Un composant de maintien de boîtier de canette disposé dans la zone du support d'article à coudre est en contact avec le boîtier de canette de sorte qu'il n'entraîne pas le boîtier de canette lors de la rotation du crochet rotatif. La partie inférieure de couture comporte un moyen de ventilation de boîtier de canette pouvant être entraîné de manière commandée pour déplacer le boîtier de canette entre une position neutre et une position ventilée dans laquelle un espace formé pour un fil entre le boîtier de canette et le composant de maintien de boîtier de canette est supérieur par rapport à la position neutre. Il en résulte une installation de couture pouvant être utilisée pour la production de masse, même en cas d'utilisation de fils épais, avec un rendement global élevée de l'installation.
EP23730831.7A 2022-06-17 2023-06-13 Installation de couture Pending EP4540451A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022206102.0A DE102022206102A1 (de) 2022-06-17 2022-06-17 Nähanlage
PCT/EP2023/065759 WO2023242171A1 (fr) 2022-06-17 2023-06-13 Installation de couture

Publications (1)

Publication Number Publication Date
EP4540451A1 true EP4540451A1 (fr) 2025-04-23

Family

ID=86771421

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23730831.7A Pending EP4540451A1 (fr) 2022-06-17 2023-06-13 Installation de couture

Country Status (6)

Country Link
US (1) US20250283260A1 (fr)
EP (1) EP4540451A1 (fr)
CN (1) CN119630846A (fr)
CA (1) CA3257932A1 (fr)
DE (1) DE102022206102A1 (fr)
WO (1) WO2023242171A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022206102A1 (de) 2022-06-17 2023-12-28 Pfaff Industriesysteme Und Maschinen Gmbh Nähanlage

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49117151A (fr) * 1973-03-11 1974-11-08

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JP4455175B2 (ja) 2004-06-08 2010-04-21 Ｊｕｋｉ株式会社 ミシンの水平釜のオープナー
JP2007301299A (ja) * 2006-05-15 2007-11-22 Tokai Ind Sewing Mach Co Ltd 多頭刺繍ミシン
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Also Published As

Publication number Publication date
CN119630846A (zh) 2025-03-14
CA3257932A1 (fr) 2025-04-08
US20250283260A1 (en) 2025-09-11
DE102022206102A1 (de) 2023-12-28
WO2023242171A1 (fr) 2023-12-21

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