EP3070194B1 - Apparatus for the positioning of pieces of cloth on sewing machines - Google Patents

Apparatus for the positioning of pieces of cloth on sewing machines Download PDF

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Publication number
EP3070194B1
EP3070194B1 EP16161404.5A EP16161404A EP3070194B1 EP 3070194 B1 EP3070194 B1 EP 3070194B1 EP 16161404 A EP16161404 A EP 16161404A EP 3070194 B1 EP3070194 B1 EP 3070194B1
Authority
EP
European Patent Office
Prior art keywords
hook
blade
cartridge
block
slot
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.)
Active
Application number
EP16161404.5A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3070194A1 (en
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
Original Assignee
Vi Be Mac SpA
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Publication date
Application filed by Vi Be Mac SpA filed Critical Vi Be Mac SpA
Publication of EP3070194A1 publication Critical patent/EP3070194A1/en
Application granted granted Critical
Publication of EP3070194B1 publication Critical patent/EP3070194B1/en
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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
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
    • D05D2207/00—Use of special elements
    • D05D2207/02—Pneumatic or hydraulic devices
    • D05D2207/04—Suction or blowing devices

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.
  • an apparatus for the positioning of a cloth piece on a sewing machine comprising a loader with a movable arm comprising, in turn, at least one gripping element.
  • the gripping element comprises a block from which a first hook and a second hook protrude, which are spaced apart and movable relative to each other, so that the first hook and the second hook move away or approach each other; said first hook has a pointed end which faces the half-space opposite to that in which the second hook rests and, likewise, said second hook has a pointed end which faces the half-space opposite to that in which the first hook rests, so that when the gripping element is placed adjacent to the cloth piece, the first hook and the second hook move away from each other and grasp the cloth piece.
  • the gripping of the cloth to be transported is obtained by means of a relative distancing of the two hooks which engage the cloth piece by placing it under tension; thus, it is sufficient that an only hook moves away from the other hook.
  • the first hook may be fixed to a first cartridge movable within a first hollow cylindrical body received in the block, said first cartridge being adapted to be moved in a first direction by a first pressurized fluid.
  • one hook or both hooks may be moved by means of a pneumatic system that sends air under pressure and causes the movable cartridge with the hook fixed on it to be moved inside the corresponding hollow cylinder.
  • the apparatus according to the invention may comprise a first elastic means which is connected to the first cartridge and is adapted to oppose the motion imparted by the first pressurized fluid so as to move the first cartridge in a second direction opposite to the first direction.
  • each hook fixed to the cartridge with the elastic means is forced to position itself in an extreme position of rest.
  • the apparatus may provide a rest position for the hooks. This position is suitably determined without consuming energy from the pneumatic system.
  • a through hole may be formed in an end of the first hollow cylindrical body and is adapted to be passed through by at least one portion of the first cartridge when said first cartridge is moved in the first direction.
  • a hole is formed in the block in which hole the first hollow cylindrical body is fixed in a position adjustable by fixing means.
  • the apparatus may have a symmetrical structure in which also the second hook may be fixed to a second cartridge, movable within a second hollow cylindrical body, said second cartridge being adapted to be moved in a second direction by the first pressurized fluid, said second direction being opposite to the first direction.
  • a second elastic means is comprised and is connected to the second cartridge and is adapted to oppose the motion imparted by the first pressurized fluid so as to move the second cartridge in the first direction. In this way, when the pneumatic system is not activated, both hooks are pushed in opposite directions so as to approach each other.
  • the apparatus according to the invention may comprise a first blade which is movable relative to the block, a first through slot and a second through slot being formed in said first blade so that when the first blade is approached to the block, the first hook and the second hook protrude from the first slot and second slot, respectively, while when the first blade is moved away from the block, the first hook and the second hook are sheltered by said first blade.
  • elastic means may be comprised and are adapted to push the first blade away from the block.
  • a second blade may be comprised and is connected through at least one pin to the first blade, said second blade being adapted to be moved by at least one piston so as to approach the first blade to the block by protruding the first hook and the second hook from the first blade through the first slot and the second slot.
  • the apparatus according to the invention may comprise at least one adjustment screw which is adapted to adjust the minimum distance of the first blade from the block so as to adjust the maximum projection of the first hook and second hook from the first blade through the first slot and the second slot.
  • 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.
  • 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Treatment Of Fiber Materials (AREA)
EP16161404.5A 2015-03-19 2016-03-21 Apparatus for the positioning of pieces of cloth on sewing machines Active EP3070194B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITVR20150043 2015-03-19

Publications (2)

Publication Number Publication Date
EP3070194A1 EP3070194A1 (en) 2016-09-21
EP3070194B1 true EP3070194B1 (en) 2017-11-29

Family

ID=53177843

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16161404.5A Active EP3070194B1 (en) 2015-03-19 2016-03-21 Apparatus for the positioning of pieces of cloth on sewing machines

Country Status (7)

Country Link
EP (1) EP3070194B1 (ru)
CN (1) CN105986374B (ru)
BR (1) BR102016005873B1 (ru)
ES (1) ES2652438T3 (ru)
MX (1) MX356407B (ru)
RU (1) RU2662659C2 (ru)
TW (1) TWI725017B (ru)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109594321B (zh) * 2017-09-30 2020-10-13 杰克缝纫机股份有限公司 一种用于裁片上料的定位指示装置
CN109097916A (zh) * 2018-10-23 2018-12-28 杰克缝纫机股份有限公司 一种移料设备及自动缝制系统

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Publication number Priority date Publication date Assignee Title
CH405899A (de) * 1962-02-21 1966-01-15 Trikotfabriken J Schiesser Ag Vorrichtung zum Ergreifen und Abgeben von Gebilden mit mindestens einem Flächenteil aus einem anstechbaren Stoff
US3291480A (en) * 1964-06-03 1966-12-13 Haddad Manuel Fabric sheet feeding device
IT1096663B (it) * 1978-06-15 1985-08-26 Rockwell Rimoldi Spa Apparecchiatura per applicare un elastico ad anello su un indumento tubolare
JPS61106194A (ja) * 1984-10-31 1986-05-24 ジューキ株式会社 布把持装置
JPH06238079A (ja) * 1992-12-14 1994-08-30 Yoshida Kogyo Kk <Ykk> 布片ピックアップ装置及び布片ピックアップ方法
CN2143626Y (zh) * 1992-12-29 1993-10-13 中卫发展中心 缝制周边辅具爪头装置
CN1037538C (zh) * 1993-05-21 1998-02-25 健荣纺织股份有限公司 清洁布自动包边制法及装置
JPH06329288A (ja) * 1993-05-24 1994-11-29 Kawasaki Steel Corp 繊維シートの分離方法およびその装置
CN1109524A (zh) * 1994-02-28 1995-10-04 财团法人金属工业研究发展中心 尖齿式的布料抓取机构
KR100996440B1 (ko) * 2010-09-09 2010-11-24 한국뉴매틱(주) 핀-타입 그리퍼 장치
CN104178940B (zh) * 2014-08-15 2016-05-04 上海富山精密机械科技有限公司 一种全自动取送料缝纫机的拿取布料装置

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Also Published As

Publication number Publication date
RU2016106968A3 (ru) 2018-05-31
TWI725017B (zh) 2021-04-21
CN105986374A (zh) 2016-10-05
BR102016005873B1 (pt) 2022-04-12
TW201634777A (zh) 2016-10-01
BR102016005873A2 (pt) 2016-09-20
RU2662659C2 (ru) 2018-07-26
CN105986374B (zh) 2020-12-11
EP3070194A1 (en) 2016-09-21
MX356407B (es) 2018-05-28
ES2652438T3 (es) 2018-02-02
RU2016106968A (ru) 2017-08-29
MX2016003439A (es) 2016-09-19

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