EP3070195B1 - Vorrichtung zur positionierung von textilstücken auf nähmaschinen - Google Patents

Vorrichtung zur positionierung von textilstücken auf nähmaschinen Download PDF

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Publication number
EP3070195B1
EP3070195B1 EP16161405.2A EP16161405A EP3070195B1 EP 3070195 B1 EP3070195 B1 EP 3070195B1 EP 16161405 A EP16161405 A EP 16161405A EP 3070195 B1 EP3070195 B1 EP 3070195B1
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EP
European Patent Office
Prior art keywords
plate
abutment element
cloth piece
cloth
piece
Prior art date
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Application number
EP16161405.2A
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English (en)
French (fr)
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EP3070195A1 (de
Inventor
Carlo Guerreschi
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.)
Vi Be Mac SpA
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Vi Be Mac SpA
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Publication date
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Publication of EP3070195A1 publication Critical patent/EP3070195A1/de
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Publication of EP3070195B1 publication Critical patent/EP3070195B1/de
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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
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B33/00—Devices incorporated in sewing machines for supplying or removing the work

Definitions

  • the present invention refers in general to an apparatus for the positioning of pieces of cloth on sewing machines. More particularly, this apparatus is capable of recovering a piece of cloth from a loader, disposing properly said piece of cloth and transporting the piece of cloth on the sewing machine.
  • the sewing machines require that the piece of cloth is disposed in the correct position in order to obtain a precise seam.
  • the automatic sewing machines are usually equipped with appropriate devices that position the piece of cloth correctly.
  • An aim and function of the invention is to obviate the above drawbacks and still others through the realization of an apparatus for the positioning of pieces of cloth on sewing machines.
  • an aim of the invention is to provide an apparatus that is capable of positioning a piece of cloth in a precise fast manner on a sewing machine.
  • Another aim of the invention is to obtain a positioning apparatus for the positioning of a piece of cloth on a sewing machine that do not require specialized operators for the first arrangement of the cloth pieces.
  • the apparatus comprises a plate from whose surface a first abutment element protrudes and on which at least one blowing device is arranged which has a blowing opening flush to the surface of the plate; at least one through opening is formed in the plate, this opening being arranged between the first abutment element and the blowing device, so that once the cloth piece has been arranged on the plate, the cloth piece is sent in abutment on the first abutment element because the cloth piece is moved by the air that is blown on the surface of the plate by the blowing device, the air going out of the plate through the opening.
  • the cloth piece is placed precisely in the desired position from which it is then moved through suitable grippers.
  • the apparatus provides that on the plate, at least one cavity is formed, which is open towards the surface of the plate and is adapted to receive at least one gripper to grasp the cloth piece.
  • one or more grippers which grasp the correctly placed cloth piece does not have to lift said cloth piece which maintain the desired position.
  • cavities may be formed, in particular a first cavity open towards the surface of the plate, and at least one second cavity open towards the surface of the plate and spaced apart from the first cavity, so that a first gripper and a second gripper are received in the first cavity and in the at least one second cavity, respectively.
  • At least two second cavities may be formed in the plate, which are adjacent to each other, so that it is possible to vary the position of the second gripper according to the size of the cloth piece.
  • a second abutment element may protrude from the surface of the plate and develop on a line intersecting the development line of the first abutment element. In this way, when the cloth piece is moving on the plate, it is stopped by the two abutment elements without even barely being able to change its position.
  • the first abutment element and the second abutment element may develop rectilinearly, the straight line on which the first abutment element rests and the straight line on which the second abutment rests being incident to each other. In this way, the cloth piece is moved on the plate and stopped between the two abutment elements.
  • first abutment element and the second abutment element may be perpendicular to each other.
  • At least one through opening may be formed adjacent to the first abutment element, in order to move immediately the cloth piece abutting on the first abutment element.
  • the blowing opening of the at least one blowing device may be orientable on the extension plane of the surface of the plate, in order to be adapted to the shape and the size of the cloth piece to be placed.
  • the apparatus according to the invention may comprise a first blade arranged above the plate so that the cloth piece is kept adjacent to the plate by the first blade even during the translating and correct positioning movement.
  • number 10 denotes an apparatus for the positioning of pieces of cloth on sewing machines, comprising a loader 12, a positioning device 14 and a transport device 16.
  • the loader 12 is adapted to take a cloth piece P from a cart 18 for the transport of cloth pieces and to let the same cloth piece P on a plate 52 included in the positioning device 14.
  • the cloth piece P is arranged in the desired position by means of the positioning device 14 and is grasped from here by the pliers 78, 84 of the transport device 16 to be brought in the correct position on the sewing machine.
  • the loader 12 as shown in detail in Figures 2 and 3 , includes a base support 20 on which the cloth piece cart 18 as well as a lifting device 22 are placed.
  • the cloth piece cart 18 comprises a base tray 19 to which a handle 21 is fixed.
  • a first lateral side 23 and a second lateral side 25 are attached to the base tray 19. Both lateral sides have vertical rods.
  • the cloth pieces P are received between the first lateral side 23 and the second lateral side 25.
  • the position of both lateral sides is adjustable so that it is possible to accommodate cloth pieces P having different shapes and sizes.
  • the lifting device 22 comprises a bottom 24 fixed to the base support 20 and comprising a slide 26 on which a movable base 28 can slide, the movable base 28 being moved by a first actuator 27 having a rod 30.
  • a vertical structure 32 is fixed to the movable base 28.
  • An arm 34 can be moved vertically along the vertical structure 32 by means of a second actuator 71.
  • the arm 34 spreads out in two ends which are provided with a gripping element 36, respectively.
  • the gripping element 36 comprises a block 37 from which a first pair of hooks, and precisely a first hook 40 and a second hook 42, protrude, as well as a second pair of hooks, also defined first hook 40 and second hook 42 protrude, as shown in Figure 5b .
  • the first hook 40 and the second hook 42 of both pairs of hooks and of both gripping elements 36 are spaced apart and movable relative to each other so that the first hook 40 and the second hook 42 can move away from each other or approach each other.
  • Each first hook 40 has a pointed end which points towards the half-space opposite to that in which the corresponding second hook 42 rests and, in the same way, each second hook 42 has a pointed end which points towards the half-space opposite to that in which the corresponding first hook 40 rests so that when the gripping element is placed adjacent to the cloth piece P, the first hook 40 and the second hook 42 move away from each other and grasp the cloth piece P.
  • a first blade 33 and a second blade 43 are arranged on the lower face and the upper face of the block 37, respectively. These blades are connected to each other at a fixed distance by means of pins 35 and are movable relative to the same block 37.
  • the distance between the first blade 33 and the second blade 43 is greater than the thickness of the block 37 so that according to two different configurations, the first blade 33 or the second blade 43 can move away from the block 37.
  • the first blade 33 when the two pistons 31 are not actuated, the first blade 33 is in a lowered position as it appears from Figures 5a, 6a, 7a e 8 because the first blade 33 is pushed by the springs which are coaxial to the pins 35. In this way, the first blade 33 prevents the hooks 40, 42 from coming in contact with the cloth piece P accidentally.
  • adjustment screws 55 are also received in the block 37.
  • the adjustment screws 55 are contrasted in their motion of screwing by cup springs 57 which enable to adjust the minimum distance possible between the first blade 33 and the lower face of the block 37.
  • cup springs 57 which enable to adjust the minimum distance possible between the first blade 33 and the lower face of the block 37.
  • the maximum projection of the hooks 40, 42 outwards the position being adjustable according to the type of fabric to grab.
  • the first hook 40 and the second hook 42 are close together while when they are put in contact with the cloth piece P in order to grab it, they are moved away from each other so as to engage the fabric.
  • the first hook 40 is fixed to a first cartridge 48 which is movable between two limit positions in a first hollow cylinder 38; in particular, the first cartridge 48 is formed by two cylinders having different diameters and the cylinder having the smaller diameter is received in a first spring 50 which counteracts the movement in a direction of the same first cartridge 48.
  • the second hook 42 is fixed to a second cartridge 46 which is movable between two limit positions in a second hollow cylinder 51; in particular, also the second cartridge 46 is formed by two cylinders having different diameters and the cylinder having the smaller diameter is received in a second spring 49 which counteracts the movement in a direction of the same second cartridge 46.
  • Two through-holes 37 are formed in the block 37. Each of the two through-holes receives a first hollow cylinder 38 with the first cartridge on which the first hook 40 is fixed, and a second hollow cylinder 51 with the second cartridge on which the second hook 42 is fixed.
  • the first hollow cylinder 38 and the second hollow cylinder 51 are fixed in the block 37 at a distance between them by means of a first grain 39 and a second grain 53, respectively, and are disposed in a symmetric position so that the first spring 50 and the second spring 49 are facing outward.
  • the space between the first hollow cylinder 38 and the second hollow cylinder 51, inside each through-hole, is put into communication through a passage element 41 and appropriate ducts, not shown in the figures, with the pneumatic system.
  • the positioning device 14 shown individually in Figure 10 , comprises a plate 52 having an essentially rectangular shape to which a first abutment element 54 and a second abutment element 56 are fixed which rise in a direction perpendicular to the plate 52 and are disposed on edges of a long side and a short side of the plate 52, respectively.
  • blowing devices 60 are arranged on the plate 52.
  • the blowing devices 60 have a swiveling blowing opening 62, respectively, and are connected to the pneumatic system of the apparatus.
  • the three blowing devices 60 are used to blow air on the surface of the plate 52.
  • the air is conveyed toward the first abutment element 54 and the second abutment element 56 so as to go out through the slots 58.
  • a cloth piece P arranged casually on the plate 52 as shown in Figure 11 , is sent in abutment against the first abutment element 54 and the second abutment element 56 so as to be positioned accurately with respect to the transport device 16 which intervenes later.
  • the plate 52 is also provided with a first oblong hollow 64 arranged adjacent to the second abutment element 56, and three second oblong hollows 66 which are closer to one another but are spaced apart from and parallel to the first hollow 64.
  • the first hollow 64 and one of the three second hollows 66 are used to receive the lower parts of eventual pliers of the transport device 16, so that the lower parts of these eventual pliers are disposed under the cloth piece P to be grasped, without lifting the cloth piece.
  • the transport device 16 comprises a support 68 which extends vertically from the base support 20.
  • An actuator 70 is fixed perpendicular to the support 68.
  • a body 74 is fixed to a rod 72 of the actuator 70.
  • the body 74 is provided with a movable rack bar 76 which is movable relative to the same body 74 as visible in Figure 18 .
  • First pliers 78 are fixed to an end of the rack bar 76 and comprise an upper rod 80 and a lower rod 82, the lower rod 82 being movable in a vertical direction relative to the upper rod 80.
  • Second pliers 84 are fixed to the same rack bar 76 and are spaced apart from the first pliers 78.
  • the second pliers 84 correspond to the first pliers 78.
  • the second pliers 84 comprise an upper rod 86 and a lower rod 88, the lower rod 88 being movable in a vertical direction relative to the upper rod 86.
  • the second pliers 84 may be fixed in different positions at a variable distance from the pliers 78, depending on the width of the cloth piece P to be transported.
  • the apparatus 10 When the apparatus 10 is in its resting phase, that is the pneumatic system is off, the apparatus 10 has the gripping elements 36 with their first hooks 40 and their second hooks 42 close to one another and, in any case, all the hooks are covered by the first blades 33 which are pushed downwards by the springs of the pins 35. This ensures optimal safety conditions because the operator is thus prevented from touching the hooks.
  • the loader 12 lowers the arm 34 on approaching the two gripping elements 36 to the first cloth piece P put at the top.
  • the two gripping elements 36 are disposed adjacent to the top cloth piece P.
  • the pistons 31 are actuated by lifting the second blades 43 so as to approach the first blades to the blocks 37 of the two gripping elements 36.
  • first hooks 40 and the second hooks 42 protrude from the slots 45, 47 and are positioned closer to one another because the pneumatic system does not supply air under pressure through the passage element 41 yet.
  • the pneumatic system supplies air between the first cartridge 48 and the second cartridge 46 so as to push them towards the outside of the block 37.
  • first hook 40 and the second hook 42 move away from each other and, through this movement, the hooks grab the cloth piece P.
  • the arm 34 is lifted, as shown in Figure 2 , by operating the actuator 71 in the vertical structure 32.
  • the arm 34 together with the cloth piece P, advances towards the positioning device 14 by operating the actuator 27 the rod 30 of which displaces the movable base 28 on the slide 26.
  • air is supplied to the three blowing devices 60 so as to blow air on the surface of the plate 52 in predetermined directions by orienting the same blowing devices 60 and relative blowing openings 62.
  • the air is conveyed to the first abutment element 54 and the second abutment element 56 so as to go out through the slots 58.
  • the air jet creates a vacuum on the plate 52 so that the cloth piece P abuts on the one side against the first abutment element 54 and on the other side against the second abutment element 56.
  • the cloth piece P is arranged in the correct position without any deformation or wrinkling because the vacuum obtained on the plate 52 ensures that the same cloth piece P is disposed completely adjacent to the same plate 52.
  • the first blade 33 is lowered thanks to the action of the springs of the pins 35 without actuating the pistons 31 by means of the pneumatic system. In this way, the hooks 40, 42 are totally hidden between the first blade 33 and the block 37.
  • the cloth piece P is positioned accurately with respect to the transport device that intervenes later.
  • the first pliers 78 and the second pliers 84 are approached to the positioning device 14, the upper rod 80 and the lower rod 82 of the first pliers 78, as well as the upper rod 86 and the lower rod 88 of the second pliers being spaced apart.
  • the lower rod 82 of the first pliers 78 is received in the first hollow 64 while the lower rod 88 of the second pliers 84 is received in one of the three second hollows 66, depending on the fixing position of the same second pliers 84 to the rack bar 76.
  • each lower rod is approached to the respective upper rod so as to grip the cloth piece P, as shown in Figure 16 .
  • the first pliers 78 and the second pliers 84 with the cloth piece P are moved away from the positioning device 14 thanks to the displacement of the body 74 obtained by operating the actuator 70.
  • the rack bar 76 is extracted from the body 74 to laterally translate the cloth piece P and to bring the same to the base of a sewing machine, not shown in the figures.
  • the perfect positioning of the cloth piece P, due to the displacement caused by the positioning device 14, is controlled by using a laser control system 90 that verifies the correct alignment of the cloth piece P by projecting a line on the cloth piece P itself.
  • a technician of the sector can provide changes or variants that are to be considered as included in the scope of protection of the present invention.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Claims (10)

  1. Vorrichtung (10) für die Positionierung eines Stoffstücks (P) an einer Nähmaschine, mit einer Positionier-Einrichtung (14), die eine Platte (52) umfasst, von deren Oberfläche ein erstes Anschlagelement (54) vorsteht und auf der mindestens eine Blaseinrichtung (60) angeordnet ist, die eine Blasöffnung (62) aufweist, die bündig zur Oberfläche der Platte (52) ist; mindestens eine durchgehende Öffnung (58) in der Platte (52) ausgebildet ist, dadurch gekennzeichnet, dass diese Öffnung zwischen dem ersten Anschlagelement (54) und der Blaseinrichtung (60) derart angeordnet ist, dass nachdem das Stoffstück (P) auf der Platte (52) angeordnet worden ist, kommt das Stoffstück (P) in Kontakt mit dem ersten Anschlagelement (54), weil das Stoffstück (P) durch die auf der Oberfläche der Platte (52) geblasene Luft von der Blaseinrichtung (60) bewegt wird, wobei die Luft aus der Platte (52) durch die Öffnung (58) tritt.
  2. Vorrichtung (10) nach Anspruch 1, wobei auf der Platte (52) zumindest ein Hohlraum (64; 66) gebildet wird, der in Richtung der Oberfläche der Platte (52) offen ist (52) und angepasst ist mindestens eine Zange (82; 86) zu aufnehmen, um das Stoffstück (P) zu greifen.
  3. Vorrichtung (10) nach Anspruch 2, wobei auf der Platte (52) ein erster Hohlraum (64) gebildet wird, die in Richtung der Oberfläche der Platte (52) offen ist, und mindestens ein zweiter Hohlraum (66) gebildet wird, die in Richtung der Oberfläche der Platte (52) offen ist und getrennt von dem ersten Hohlraum (64) derart angeordnet ist, dass eine erste Zange (82) und eine zweite Zange (86) im ersten Hohlraum (64) und zumindest im zweiten Hohlraum (66), wahlweise aufgenommen sind.
  4. Vorrichtung (10) nach Anspruch 3, wobei mindestens zwei zweite Hohlräume (66) in der Platte (52) ausgebildet sind, die zueinander benachbart sind.
  5. Vorrichtung (10) nach einem der vorhergehenden Ansprüche, wobei ein zweites Anschlagelement (56) aus der Oberfläche der Platte (52) vorsteht un sich auf einer Linie erstreckt, die die Entwicklungslinie des ersten Anschlagelements (54) schneidet.
  6. Vorrichtung (10) nach dem vorhergehenden Anspruch, wobei das erste Anschlagelement (54) und das zweite Anschlagelement (56) sich geradlinig erstrecken, wobei die gerade Linie auf der das erste Anschlagelement (54) ruht und die gerade Linie auf der das zweite Anschlag (56) ruht, sich zueinander schneiden.
  7. Vorrichtung (10) nach dem vorhergehenden Anspruch, wobei das erste Anschlagelement (54) und das zweite Anschlagelement (56) senkrecht zueinander liegen.
  8. Vorrichtung (10) nach einem der vorhergehenden Ansprüche, wobei zumindest eine durchgehende Öffnung (58) neben dem ersten Anschlagelement (54) ausgebildet ist.
  9. Vorrichtung (10) nach einem der vorhergehenden Ansprüche, wobei die Blasöffnung (62) der mindestens einen Blaseinrichtung (60) auf der Erstreckungsebene der Oberfläche der Platte (52) ausrichtbar ist.
  10. Vorrichtung (10) nach einem der vorhergehenden Ansprüche, wobei eine erste Klinge (33) oberhalb der Platte (52) derart aufgenommen und angeordnet ist, dass das Stoffstück (P) an der Platte (52) durch die erste Klinge (33) gehalten wird.
EP16161405.2A 2015-03-19 2016-03-21 Vorrichtung zur positionierung von textilstücken auf nähmaschinen Active EP3070195B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITVR20150044 2015-03-19

Publications (2)

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EP3070195A1 EP3070195A1 (de) 2016-09-21
EP3070195B1 true EP3070195B1 (de) 2017-11-29

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ES (1) ES2652439T3 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106835520B (zh) * 2017-02-17 2022-03-29 广东溢达纺织有限公司 对边装置
CN107513816A (zh) * 2017-09-27 2017-12-26 唐志君 一种服装百变万用模板框
CN108457008B (zh) * 2018-03-28 2021-05-25 杰克缝纫机股份有限公司 一种门襟卷缝机
JP7224154B2 (ja) * 2018-11-22 2023-02-17 Juki株式会社 被縫製物搬送装置
CN109594217B (zh) * 2018-12-13 2021-04-13 杰克缝纫机股份有限公司 一种缝纫设备上的吹气送料装置
CN112680889A (zh) * 2019-10-17 2021-04-20 阿里巴巴集团控股有限公司 缝纫设备及方法
CN111764054A (zh) * 2020-06-19 2020-10-13 宁波舒普机电股份有限公司 一种罗纹下摆包缝机的托料安装结构

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GB1237355A (en) * 1969-01-22 1971-06-30 Jacobs Machine Corp Improvements in or relating to alignment beds
US3656744A (en) * 1970-03-13 1972-04-18 Usm Corp Sheet registering mechanism
JPS6087148A (ja) * 1983-10-20 1985-05-16 Maaberuto Assoc Kk 布地位置決め装置
US4800830A (en) * 1988-03-02 1989-01-31 Union Special Corporation Hemmer seamer assembly

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ES2652439T3 (es) 2018-02-02
EP3070195A1 (de) 2016-09-21

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