EP1201809A2 - Plaque à aiguille pour l'éxécution de coutures surjetées - Google Patents
Plaque à aiguille pour l'éxécution de coutures surjetées Download PDFInfo
- Publication number
- EP1201809A2 EP1201809A2 EP01830615A EP01830615A EP1201809A2 EP 1201809 A2 EP1201809 A2 EP 1201809A2 EP 01830615 A EP01830615 A EP 01830615A EP 01830615 A EP01830615 A EP 01830615A EP 1201809 A2 EP1201809 A2 EP 1201809A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- auxiliary
- tab
- main
- needle plate
- 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.)
- Withdrawn
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B73/00—Casings
- D05B73/04—Lower casings
- D05B73/12—Slides; Needle plates
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B1/00—General types of sewing apparatus or machines without mechanism for lateral movement of the needle or the work or both
- D05B1/08—General types of sewing apparatus or machines without mechanism for lateral movement of the needle or the work or both for making multi-thread seams
- D05B1/18—Seams for protecting or securing edges
- D05B1/20—Overedge seams
Definitions
- the present invention relates to a needle plate for execution of overedging seams comprising the features set forth in the preamble of claim 1.
- the trimming-sewing machines are equipped with a sewing device having a needle carrying a sewing thread provided with a reciprocating movement in a rectilinear direction.
- the needle is set to pass through a needle plate on which the workpiece is designed to move forward.
- Such a device further comprises a lower arm and an upper arm alternately oscillatable around a rotation axis parallel to the feed direction of the workpiece.
- a lower looper carrying a respective interlinking thread is mounted in engagement with the lower arm so that the lower looper is alternately movable following an arched trajectory in a direction substantially perpendicular to the feed direction of the workpiece.
- Mounted on the upper arm is a respective upper looper possibly provided with a respective thread, alternately movable according to an arched trajectory substantially perpendicular to the feed direction of the workpiece.
- Cooperation between the needle, lower looper and upper looper gives rise to the desired overedging seam.
- a first machine usually consisting of a trimming machine carries out a first overedging seam and a second machine disposed in series with the first machine, carries out a second overedging seam superposed on the first seam.
- the first and second machines are connected with each other by a transferring guide by which each cloth workpiece previously worked in the first machine, is sent to the second one.
- the fabric parts forming the workpiece are submitted to a cutting operation to determine a perfect mating of the junction edges of said parts. Simultaneously with the cutting operation and immediately downstream of the region where this operation is carried out, the first machine is set to execute an overedging seam causing assembling of the fabric parts forming the workpiece.
- the cloth workpiece is then moved on along the transferring guide to reach the second machine, at which a further overedging seam is carried out in superposition with the seam executed by the first machine.
- the Applicant has found that known apparatus and techniques for executing junctions between the fabric parts in the manufacture of cloth articles by means of superposed overedging seams are not exempt from drawbacks and can be improved from different points of view mainly as regards the quality of the obtained seams as well as the positioning regularity and accuracy between the stitches of the different seams.
- the interposition between stitches of the different seams is inhomogeneous because the workpiece that has already been submitted to a first overedging operation is transferred from the first machine or trimming machine to the second machine where another overedging seam is carried out.
- the needle plates normally used in association with the device being the object of the above application can be improved mainly as regards the quality of the obtained seam, as well as the quality of the finished product.
- the needle plates normally used with such devices can give rise to formation of uneven and inhomogeneous seams the sewing stitches of which are not alternated with each other in a precise manner and with a constant pitch.
- a needle plate for execution of overedging seams in accordance with the present invention has been generally identified by reference numeral 5.
- the needle plate 5 appears to be advantageously unstable on machines set to carry out overedging seams, in association with a device 1 comprising at least one needle bar 2 alternately movable according to a substantially rectilinear trajectory.
- a device 1 comprising at least one needle bar 2 alternately movable according to a substantially rectilinear trajectory.
- Fastened to the needle bar 2 by appropriate locking means is at least one main needle 3 and at least one auxiliary needle 4 both oriented downwardly and carrying a main sewing thread and an auxiliary sewing thread (not shown), respectively.
- the main needle 3 and auxiliary needle 4 move therefore integrally with the needle bar 2 in a rectilinear reciprocating motion through the needle plate 5 located below the needles and along which a workpiece runs in a sewing direction denoted by arrow "A" in the accompanying figure.
- the main 3 and auxiliary 4 needles lie in a plane transverse to the sewing direction "A" of the workpiece.
- needles 3, 4 lie in a plane substantially oblique to the sewing direction "A” defining an inclination angle " ⁇ " therewith, of an opening included between 1° and 70°, measurable in the lying plane of the needle plate 5.
- Device 1 further comprises at least one lower arm 6 disposed laterally of the needle plate 5 and rigidly connected, by an end 6a thereof, with a lower drive shaft (not shown as known by itself) alternately oscillatable around a longitudinal axis "X" thereof.
- the lower loopers 7, 8 are alternately movable simultaneously with each other, following an arched trajectory in a direction perpendicular to the sewing direction "A" of the workpiece.
- the movement direction of each lower looper 7, 8 intersects the movement direction of the respective needle 3, 4 with which the respective sewing stitch is formed.
- the main lower looper 7 and auxiliary lower looper 8 carry a main interlinking thread and an auxiliary interlinking thread (not shown), respectively, which are intended to be interlinked with the main sewing thread and the auxiliary sewing thread carried by the respective needles 3, 4 to generate, as better clarified in the following, a main seam portion and an auxiliary seam portion superposed on the main seam portion, respectively.
- the device Opposite to the lower support arm 6 and laterally of the needle plate 5, the device further involves an upper support arm 9 connected by an end 9a thereof to a kinematic drive mechanism (not shown as known per se) and provided, at the other end 9b thereof opposite to end 9a, with at least one main upper looper 10 and at least one auxiliary upper looper 11.
- the kinematic drive mechanism sets the upper arm 9 in motion so that both the upper loopers 10, 11 follow a movement trajectory extending astride an edge of the workpiece in a direction substantially transverse to the sewing direction "A" of the workpiece itself.
- the main upper looper 10 and/or the auxiliary upper looper 11 may possibly carry respective interlinking threads designed to form, together with the interlinking threads of the lower loopers 7, 8 and the needles 3, 4, the stitches of the main and auxiliary seam portions to be executed.
- the needle plate 5 has a substantially plate-like structure made up of a first portion 12 which is substantially rectangular and a second portion 13 which is substantially trapezoidal and of one piece construction with the first portion 12 from which it laterally projects in cantilevered fashion, on the opposite side with respect to a primary side 17 substantially parallel to the sewing direction "A" and defined along the perimetral extension of the needle plate 5.
- the needle plate 5 is provided with fastening holes 14a, 14b to be engaged by respective screw-threaded elements not shown.
- the needle plate 5 can be provided with one or more central openings 15 through which one or more feed dogs operate which are part of a feeding device (not shown as known per se) acting on the workpiece to cause moving forward of same in the above-mentioned sewing direction "A".
- central openings 15 disposed in mutual side by side relationship are provided and they have an elongated configuration in a direction parallel to the sewing direction; also provided are two auxiliary openings 16 interposed in parallel between the central openings 15 and the primary side 17.
- the needle plate 5 further has a main slot 21 and an auxiliary slot 22 formed close to the primary side 17.
- the main slot 21 and auxiliary slot 22 are arranged to be operatively passed through by the main needle 3 and auxiliary needle 4 of the above described device, respectively.
- each slot 21, 22 has a substantially L-shaped conformation defined by a first stretch 21a, 22a substantially parallel to the primary side 17 of the needle plate 5 and a second stretch 21b, 22b substantially perpendicular to the first stretch 22a and extending between the first stretch and the primary side 17 so as to break continuity thereof.
- the primary stretch 21a, 22a of each slot 21, 22 has an end portion 21c, 22c opposite to the respective stretch 21b, 22b and designed to be passed through by the respective needle 3, 4.
- the end portions 21c, 22c of slots 21, 22 are disposed mutually in side by side relationship in a direction transverse to the sewing direction "A" and to the primary side 17 of the needle plate 5 in such a manner that the distance between the end portion 21c of the main slot 21 and the primary side 17 is different from the distance between said primary side and the end portion 22c of the auxiliary slot 22.
- slots 21, 22 can also be formed so as to be mutually aligned along a direction substantially parallel to the primary side 17.
- the needle plate 5 further involves the presence of a main tab 23 and an auxiliary tab 24 formed at the primary side 17 of the needle plate 5 itself and at least partly bounding the respective main 21 and auxiliary 22 slots; said tabs each have an end edge 23a, 24a spaced apart from the end portion 21c, 22c of the corresponding slot 21, 22 and facing away from said slots.
- tabs 23, 24 are substantially aligned along the primary side 17 of the needle plate 5.
- the end edge 23a, 24a of each tab 23, 24 is preferentially in alignment with the end edge 23a, 24a of the other tab 23, 24 along one and the same direction parallel to the sewing direction "A".
- tabs 23, 24 on the needle plate 5 which have end edges 23a, 24a offset with respect to a direction parallel to the sewing direction "A".
- each seam portion is determined by the distance measurable between the end edge 23a, 24a of each tab 23, 24 and the end portion 21c, 22c of the corresponding slot 21, 22.
- each tab 23, 24 should have at least one tail portion 23b, 24b terminating at the second stretch 21b, 22b, of the respective slot 21, 22 and disposed obliquely of the primary side 17 of the needle plate 5 with an inclination converging towards the respective slot 21, 22 away from the end portion 21c, 22c of said slot.
- the tail portion 23b of the main tab 23 is preferably oriented substantially parallel to the tail portion 24b of the auxiliary tab 24.
- the tail portions 23b, 24b may have an inclination degree different from each other, consequently giving rise to different courses in the forward or feed movement of the different seam portions being executed.
- the needle plate 5 further comprises a lead-in portion 25 interposed between the main tab 23 and the auxiliary tab 24 to convey the main seam portion moving forward along the main tab 23, towards and upon the auxiliary tab 24.
- the lead-in portion 25 has a first end 25a disposed at a lower position relative to the main tab 23 and a second end 25b, opposite to the first end 25a, of one piece construction with the auxiliary tab 24 so as to define an inclined plane extending from bottom to top away from the main tab 23, until it becomes coincident with the upper surface of the auxiliary tab 24.
- the lead-in portion is defined by a chamfer extending from the auxiliary tab 24 downwardly towards the main tab 23 to accompany the main seam portion over the needle plate 5 before the main seam portion itself reaches the auxiliary tab 24 where the auxiliary seam portion is made.
- the needle plate 5 further comprises an end portion 26 provided with a further chamfer 27 to cause the superposed seam portions from the auxiliary tab 24 to move forward.
- the cloth workpiece is guided onto the needle plate 5 of the trimming-sewing machine, at which a trimming operation is carried out, immediately upstream of needles 3, 4, on the edge of the workpiece to be sewn.
- a main seam portion is formed by cooperation between the main needle 3, the main lower looper 7 and the main upper looper 10 around the main tab 21, and an auxiliary seam portion is formed by interaction between the auxiliary needle 4, the auxiliary lower looper 8 and the auxiliary upper looper 11 around the auxiliary tab 22.
- the stroke of the main lower looper 7 has the same length as the stroke of the auxiliary lower looper 8 since both loopers are fastened to the same lower support arm 6.
- the auxiliary seam portion prefferably has a border height, i.e. a distance between the sewing stitch and the respective edge of the materials to be joined together, greater than the border height of the main seam portion.
- This difference between the border heights of the seam portions is determined by the offset arrangement of needles 3, 4 relative to the sewing direction "A" which needles act through the respective offset slots 21, 22 of the needle plate 5.
- the main needle 3 since it lies in a plane transverse to the sewing direction "A", the main needle 3 forms a stitch on the workpiece, close to the main slot 21, which is closer to the junction edge of the fabric parts to be joined than the stitch formed by the auxiliary needle 4 at the auxiliary slot 22.
- the lower loopers 7, 8 and upper loopers 10, 11 may be provided to be mutually offset in the respective movement directions, by an extent corresponding to the distance between centres measurable between the needles 3, 4 in a direction normal to the sewing direction "A".
- the main and auxiliary seam portions of the obtained overedging seam each have a series of sewing stitches having a predetermined pitch.
- the pitch of the sewing stitches of the main portion is the same as the pitch of the sewing stitches of the auxiliary portion and each sewing stitch of the auxiliary portion is spaced a predetermined distance from the preceding stitch of the main portion, which distance may for example correspond to half the sewing pitch.
- the present invention solves the problems found in the known art and achieves the intended purposes.
- the device being the object of the invention enables superposed overedging seams to be obtained which have a high accuracy degree in the interposition between the stitches of said seams.
- such a device enables each sewing stitch to be surely spaced from the preceding and following stitches by a desired and planned distance.
- the auxiliary sewing stitches to be coincident with the middle point measurable between the main sewing stitches, such a configuration will not be submitted to any variation during the whole working and will give, as a final result, a precise and homogeneous double overedging seam. This condition is made possible by the vicinity between the elements adapted to make the main seam portion or first seam and the elements adapted to make the auxiliary seam portion or second seam.
- the workpiece is not submitted to long displacements any more, along guides or other similar conveying means bringing it from the region where the first seam takes place to the region where the second seam is executed, but it is directly treated in a single region involving execution of both seams simultaneously.
- the accuracy in interlinking the stitches of the first seam with those of the second seam enables achievement of seams of high quality even on curvilinear stretches or edges of the material, carrying out feeding of the workpiece either manually or automatically.
- a needle plate 5 in accordance with the invention in association with the above-mentioned device 1 enables the quality of the obtained seams to be greatly improved because device 1 is adapted to give the best in terms of functional performance.
- the presence of a tab 23, 24 for each slot 21, 22 causes each of the seam portions to be disengaged from the needle plate in an optimal manner, without causing inhomogeneity in the stitch distribution and/or creasing or puckering of the material.
- the width of the two obtained seam portions can be managed separately and independently of each other.
- a second seam portion of greater or smaller width or border height than the first seam portion or of same width or border height as said first seam portion.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2000MI002339A IT1319249B1 (it) | 2000-10-27 | 2000-10-27 | Placca ago per l'esecuzione di cuciture a punto sopraggitto. |
ITMI202339 | 2000-10-27 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1201809A2 true EP1201809A2 (fr) | 2002-05-02 |
EP1201809A3 EP1201809A3 (fr) | 2002-12-18 |
Family
ID=11446055
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01830615A Withdrawn EP1201809A3 (fr) | 2000-10-27 | 2001-09-28 | Plaque à aiguille pour l'éxécution de coutures surjetées |
Country Status (4)
Country | Link |
---|---|
US (1) | US20020050239A1 (fr) |
EP (1) | EP1201809A3 (fr) |
CN (1) | CN1351208A (fr) |
IT (1) | IT1319249B1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019123140A1 (fr) * | 2017-12-21 | 2019-06-27 | Tor.Mec Ambrosi S.R.L. | Machine à coudre pourvue d'un système modulaire flexible pour la variation des calibres d'aiguille |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101169259B1 (ko) * | 2005-10-27 | 2012-08-02 | 주식회사 썬스타 | 2본침 재봉틀용 침판 |
ITMI20112188A1 (it) * | 2011-11-30 | 2013-05-31 | Santoni & C Spa | Macchina cucitrice e procedimento per cucire tra loro, mediante tale macchina cucitrice, almeno due lembi di tessuto sovrapposti |
CN107385695B (zh) * | 2017-08-29 | 2023-01-24 | 李建刚 | 双面绒面料片双分缝拼接方法及面料片双分缝拼接结构 |
CN109680423B (zh) * | 2018-08-29 | 2024-08-23 | 江苏华佳丝绸股份有限公司 | 一种高效率辅助肩带包边的缝纫机针板 |
CN114411347B (zh) * | 2022-02-19 | 2023-04-07 | 沈阳金杯延锋汽车内饰系统有限公司 | 一次性缝纫底带辅助工装 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1305451A (fr) * | 1960-07-18 | 1962-10-05 | Man Sew Corp | Machine à coudre à piqûres composites |
US4831947A (en) * | 1987-02-19 | 1989-05-23 | Union Special G.M.B.H | Two-needle overedge sewing machine with apparatus for sewing in thread chain |
GB2272228A (en) * | 1992-11-10 | 1994-05-11 | Pegasus Sewing Machine Mfg Co | Needle plate for a sewing machine for piping |
US6070541A (en) * | 1996-10-17 | 2000-06-06 | Juki Corporation | Overedge sewing machine with movable needle plate parts |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1041698A (en) * | 1912-08-01 | 1912-10-15 | Willcox & Gibbs Sewing Machine | Looper mechanism for sewing-machines. |
US3342150A (en) * | 1964-02-12 | 1967-09-19 | Pfaff Ag G M | Upper and lower border deflecting means for overedge sewing machines |
DE8713500U1 (de) * | 1987-09-29 | 1987-12-03 | Pfaff Industriemaschinen Gmbh, 6750 Kaiserslautern | Doppelkettenstichnähmaschine mit Greifer und Greiferfadenspreizer |
-
2000
- 2000-10-27 IT IT2000MI002339A patent/IT1319249B1/it active
-
2001
- 2001-09-28 EP EP01830615A patent/EP1201809A3/fr not_active Withdrawn
- 2001-10-25 US US09/983,669 patent/US20020050239A1/en not_active Abandoned
- 2001-10-26 CN CN01137542A patent/CN1351208A/zh active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1305451A (fr) * | 1960-07-18 | 1962-10-05 | Man Sew Corp | Machine à coudre à piqûres composites |
US4831947A (en) * | 1987-02-19 | 1989-05-23 | Union Special G.M.B.H | Two-needle overedge sewing machine with apparatus for sewing in thread chain |
GB2272228A (en) * | 1992-11-10 | 1994-05-11 | Pegasus Sewing Machine Mfg Co | Needle plate for a sewing machine for piping |
US6070541A (en) * | 1996-10-17 | 2000-06-06 | Juki Corporation | Overedge sewing machine with movable needle plate parts |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019123140A1 (fr) * | 2017-12-21 | 2019-06-27 | Tor.Mec Ambrosi S.R.L. | Machine à coudre pourvue d'un système modulaire flexible pour la variation des calibres d'aiguille |
Also Published As
Publication number | Publication date |
---|---|
CN1351208A (zh) | 2002-05-29 |
ITMI20002339A1 (it) | 2002-04-27 |
IT1319249B1 (it) | 2003-09-26 |
EP1201809A3 (fr) | 2002-12-18 |
US20020050239A1 (en) | 2002-05-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
RU2091524C1 (ru) | Трубчатое вязаное изделие | |
US5383414A (en) | Apparatus for making a three needle stitch with cover thread | |
EP1201809A2 (fr) | Plaque à aiguille pour l'éxécution de coutures surjetées | |
US3340834A (en) | Method of and apparatus for knitting and linking articles of wear | |
CN111850848B (zh) | 用于将针织品与衣领缝连的缝连机 | |
US4117792A (en) | Overedge stitch formation | |
US4175499A (en) | Method and apparatus for forming an overedge stitch | |
CN1177961C (zh) | 缝纫机 | |
TWI729090B (zh) | 縫紉機 | |
US4022139A (en) | Tacker guide and method | |
US4526113A (en) | Method and apparatus for manufacturing pantyhose | |
KR20220112918A (ko) | 복수의 바늘을 구비하는 재봉기 | |
US3922980A (en) | Chain stitch sewing machine | |
US597663A (en) | Stitch-slacking device for sewing-machines | |
US1127067A (en) | Chain-stitch sewing-machine. | |
US2940406A (en) | Two thread chain stitch sewing machine | |
US4536891A (en) | Method and apparatus for manufacturing pantyhose | |
JPS6125754Y2 (fr) | ||
US20220364286A1 (en) | Thread positioner of double chain stitch and sewing machine having thread positioner | |
US689343A (en) | Bar-stitch attachment for sewing-machines. | |
WO2023047539A1 (fr) | Machine à coudre et procédé de couture | |
US6213038B1 (en) | Needle plate for a two needle interlock sewing machine | |
US583387A (en) | Union | |
US1399406A (en) | Fabric-guiding device for sewing-machines | |
EA040520B1 (ru) | Кеттельная машина, содержащая направляющую для правильного расположения одинарного ворота и детали трикотажного изделия по отношению друг к другу |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR |
|
AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
AKX | Designation fees paid | ||
REG | Reference to a national code |
Ref country code: DE Ref legal event code: 8566 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20030619 |