WO2021122086A1 - Stichbildungswerkzeug-baugruppe für eine nähanlage sowie nähanlage mit einer derartigen baugruppe - Google Patents
Stichbildungswerkzeug-baugruppe für eine nähanlage sowie nähanlage mit einer derartigen baugruppe Download PDFInfo
- Publication number
- WO2021122086A1 WO2021122086A1 PCT/EP2020/084822 EP2020084822W WO2021122086A1 WO 2021122086 A1 WO2021122086 A1 WO 2021122086A1 EP 2020084822 W EP2020084822 W EP 2020084822W WO 2021122086 A1 WO2021122086 A1 WO 2021122086A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- needle
- sewing
- stitch
- gripper
- forming tool
- Prior art date
Links
- 238000009958 sewing Methods 0.000 title claims abstract description 74
- 239000000463 material Substances 0.000 claims abstract description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011365 complex material Substances 0.000 description 1
- 208000008918 voyeurism Diseases 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B57/00—Loop takers, e.g. loopers
- D05B57/02—Loop takers, e.g. loopers for chain-stitch sewing machines, e.g. oscillating
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B57/00—Loop takers, e.g. loopers
- D05B57/30—Driving-gear for loop takers
- D05B57/32—Driving-gear for loop takers in chain-stitch sewing machines
Definitions
- Stitch-forming tool assembly for a sewing system and sewing system with such an assembly
- the invention relates to a stitch-forming tool assembly for a sewing system for producing a double chainstitch seam.
- the invention also relates to a sewing system with such an assembly.
- a double chain stitch sewing machine is known from DD-PS 1111 02.
- An adjusting device for a sewing machine gripper is known from DE 29 01 582 C2.
- DE-PS 104963 discloses a device for he further of thread loops in double chain stitch machines.
- DE 39 35 779 C1 discloses a gripper disengagement device on a sewing machine.
- US 6,095,069 discloses a double chain stitch sewing machine.
- DE-PS 667052 discloses a sewing needle with a thread cutting edge.
- this object is achieved by a stitch forming tool assembly with the features specified in claim 1.
- DD-PS 1111 02 and DE 29 01 582 C2 show gripper drives from the prior art, which specify such an elliptical evasive movement path and are designed correspondingly complex. A correspondingly complex drive can be dispensed with in the assembly according to the invention.
- the sewing direction is in the assembly according to the invention in the swing plane of motion of the gripper, which is also known as an inline system be.
- the gripper does not perform an evasive movement perpendicular to the oscillating movement plane.
- the stitch-forming tool assembly can be designed so that it does not require a spreader finger to spread open a thread loop and to facilitate threading into the thread loop accordingly.
- a spreader finger which can be omitted here, is known from a chain stitch sewing machine of the Pfaff 5626 type through prior public use.
- a central longitudinal axis of the sewing needle is spaced from a needle tip of the Nähna del. Such a spacing of the sewing needle central longitudinal axis from the needle tip enables an orientation of the sewing needle to the gripper, which simplifies an obstruction-free relative movement of these stitch-forming components during the stitch-forming sequence.
- the needle can also be designed in such a way that it only moves up and down in exactly one direction, that is to say in the needle-pricking direction, so it does not perform any evasive movement relative to the gripper. This applies in particular to the designs according to claims 3 or 4.
- a sewing system has those advantages that have already been explained above with reference to the stitch-forming tool assembly.
- a sewing machine or an automatic sewing machine can listen to the sewing system, for which the stitch-forming tool assembly is a component.
- Part of the sewing system can also be a robot that controls / regulates a sewing head with the stitch-forming tool assembly in several degrees of freedom, so that even more complex material geometries can be provided with defined seams, in particular with three-dimensional seams.
- the sewing system can therefore be a sewing robot whose sewing head can be displaced driven by several degrees of freedom of translation or rotation, or it can be a sewing machine.
- Fig. 1 is a very schematic side view of a sewing system in the form of a sewing robot with indicated stitch formation components for generating a double chain stitch seam;
- FIG. 3 is a schematic plan view of the sewing needle and a section of the gripper, seen from direction III in Fig. 2;
- Fig. 1 shows very schematically main components of a sewing system 1, formed as a sewing robot.
- the sewing system 1 has a C-shaped frame 2 with an arm 3, a base plate 4 and a stand 5 which connects the arm 3 to the base plate 4.
- Part of the sewing system 1 can be a drive, not shown, by means of which the frame 2 can be displaced in several degrees of freedom of translation or rotation, for example in three, four, five or six degrees of freedom.
- a drive is known in connection with industrial robots. Accordingly, the sewing system 1 can be performed as a sewing robot.
- FIG. 1 also shows a Cartesian xyz coordinate system to facilitate the arrangement of positional relationships.
- the x-axis ver runs to the Figure 1 perpendicular to the plane of this out.
- the y-axis runs in Fig. 1 to the right parallel to the extension of the arm 3 and the base plate 4.
- the z-axis runs in Fig. 1 upwards pa rallel to the extension of the stand 5.
- the axial directions x, y, z also apply to the following figures.
- Part of the sewing system 1 is a stitch-forming tool assembly 6 for generating a double chain stitch seam 7, for which a pattern is shown in FIG. 2 and in FIGS. 4 and 5.
- a sewing direction runs along the x-direction, that is, perpendicular to the yz-plane given by the C-shape of the frame 2.
- the assembly 6 has a sewing needle 8 which is held by a needle bar 9 th.
- the needle bar 9 and with it the sewing needle 8 can be driven up and down in a needle stitching direction along the z-axis perpendicular to a sewing material not shown in the drawing.
- the sewing needle 8 is designed to guide a needle thread 10, which is also referred to as an upper thread.
- the sewing needle 8 has an eye 11 for this purpose.
- the stitch formation assembly 6 also includes a gripper 12 which, in the side view according to FIGS. 2, 4 and 5, has a hook-shaped design and is carried by a driven gripper carrier 13.
- the gripper 12 has a cranked design.
- a threading section 14 of the looper 12 has a thread passage opening 16, 17 for a looper thread 18, which is also referred to as a lower thread, in the region of a looper tip 15 and at its opposite end.
- the looper 12 is designed to guide the looper thread 18. Due to a not shown drive of the gripper carrier 13, the gripper is also designed for an oscillating movement in an oscillating movement plane which coincides with the xz plane, i.e. on the one hand from the needle stitch direction z and on the other hand from the sewing direction x along the double chain stitch Seam 7 is stretched.
- a trajectory of the gripper lies during the entire double chain stitch, of which snapshots are shown in Figs. 2, 4 and 5, completely in the oscillating Movement plane xz. The gripper 12 therefore does not perform any evasive movement perpendicular to this oscillating movement plane xz.
- the sewing direction x lies accordingly in the oscillating movement plane xz of the gripper 12.
- the sewing unit 1 thus represents an inline system.
- the stitch formation tool assembly 6 does not include a spreader finger.
- Such a spreader finger which is not available here, is known, for example, from prior public use from a Pfaff 5626 chain stitch sewing machine.
- FIG. 3 shows a schematic plan view of the sewing needle 8 and a broken portion of the threading section 14 of the gripper 12.
- a viewing direction in FIG. 3 is along a central longitudinal axis 19 of the sewing needle 8.
- a piercing point of a needle tip 20 through the plane of the drawing in FIG the central longitudinal axis 19 is spaced apart from the needle tip 20 by a distance 5y.
- the sewing needle 8 is therefore not rotationally symmetrical in the area of the needle tip 20, but the needle tip 20 is displaced by the distance 5y with respect to an axis of symmetry of a needle base body, which coincides with the central longitudinal axis 19.
- the needle tip 20 is spaced perpendicular to the oscillating movement plane xz by the distance 5y from the central longitudinal axis 19. If the threading section 14 of the Grei fers 12 passes the needle tip 20 during the stitch formation, the central longitudinal axis 19, as also shown in FIG. 3, lies between the needle tip 20 and the threading section 14 of the gripper 12, that is, between the needle tip 20 and the gripper 12.
- This decentering of the needle tip 20 makes it easier to guide the sewing needle 8 past the threading section 14, in particular when the needle tip 20 is pierced into a loop of the looper thread 18 as shown in FIG. 2.
- the threading section 14 is guided past a Spit zen section of the sewing needle 8 at a very small distance.
- the components 8, 12 can also touch each other here.
- FIG. 2 a support element 21 for the material to be sewn and a presser or transport foot 22 for the material to be sewn is also shown.
- the sewing material is moved between the support element 21 and the foot 22 in the sewing direction x.
- FIG. 4 shows the moment of the formation sequence of the double chain stitch at which the sewing needle 8 has arrived in the area of a bottom dead center.
- the hook tip 15 is in the area of a dead center on the right in FIG. 4 and deflected to such an extent that in the projection according to FIG. 4 it has reached beyond a section 23 of the needle thread 10 guided out of the eye 11.
- Fig. 5 shows the moment of the stitch formation sequence at which the Einfädelab section 14 is threaded into a needle thread loop formed in the needle thread section 23 due to the reversal of the movement of the sewing needle 8, with the looper thread 18 in the area of the thread passage opening 16 of the Threading section 14 through this loop of the Needle thread section 23 is passed through.
- the next piercing cf. Fig.
- the assembly 6 can also be prepared as a conversion kit for a sewing system.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MX2022007375A MX2022007375A (es) | 2019-12-17 | 2020-12-07 | Modulo de herramientas de formacion de puntada para una instalacion de costura asi como instalacion de costura con un modulo de este tipo. |
CA3162024A CA3162024A1 (en) | 2019-12-17 | 2020-12-07 | Stitch-forming tool assembly for a sewing system and sewing system having such an assembly |
US17/785,442 US11952692B2 (en) | 2019-12-17 | 2020-12-07 | Stitch-forming tool assembly for a sewing system and sewing system having such an assembly |
EP20820873.6A EP4077792B1 (de) | 2019-12-17 | 2020-12-07 | Stichbildungswerkzeug-baugruppe für eine nähanlage sowie nähanlage mit einer derartigen baugruppe |
JP2022537610A JP2023507439A (ja) | 2019-12-17 | 2020-12-07 | 縫製装置のためのステッチ形成工具アセンブリ及びこのようなアセンブリを有する縫製装置 |
CN202080088393.XA CN115087772B (zh) | 2019-12-17 | 2020-12-07 | 用于缝纫系统的线迹形成工具组件和具有其的缝纫系统 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019219814.7 | 2019-12-17 | ||
DE102019219814.7A DE102019219814A1 (de) | 2019-12-17 | 2019-12-17 | Stichbildungswerkzeug-Baugruppe für eine Nähanlage sowie Nähanlage mit einer derartigen Baugruppe |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2021122086A1 true WO2021122086A1 (de) | 2021-06-24 |
Family
ID=73748100
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2020/084822 WO2021122086A1 (de) | 2019-12-17 | 2020-12-07 | Stichbildungswerkzeug-baugruppe für eine nähanlage sowie nähanlage mit einer derartigen baugruppe |
Country Status (8)
Country | Link |
---|---|
US (1) | US11952692B2 (de) |
EP (1) | EP4077792B1 (de) |
JP (1) | JP2023507439A (de) |
CN (1) | CN115087772B (de) |
CA (1) | CA3162024A1 (de) |
DE (1) | DE102019219814A1 (de) |
MX (1) | MX2022007375A (de) |
WO (1) | WO2021122086A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019219814A1 (de) * | 2019-12-17 | 2021-06-17 | Pfaff Industriesysteme Und Maschinen Gmbh | Stichbildungswerkzeug-Baugruppe für eine Nähanlage sowie Nähanlage mit einer derartigen Baugruppe |
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DE104963C (de) | 1897-05-18 | 1899-08-19 | The Singer Manucfacturing Company | Einrichtung zum Erweitern der Fadenschlingen bei Doppelkettenstich-Nähmaschinen |
DE667052C (de) | 1938-11-03 | Johann Eisenhofer | Naehnadel mit Fadenschneidkante | |
DD111102A1 (de) | 1974-01-09 | 1975-01-20 | ||
DE2901582C2 (de) | 1978-02-13 | 1983-01-05 | Union Special Corp., Chicago, Ill. | Einstellvorrichtung für den auf einer elliptischen Bahn oszillierenden Greifer einer Nähmaschine |
DE3935779C1 (de) | 1989-10-27 | 1990-11-29 | Union Special Gmbh, 7000 Stuttgart, De | |
US6095069A (en) | 1994-11-23 | 2000-08-01 | Tadzhibaev; Zarif Sharifovich | Double-thread chain-stitch sewing machine |
EP1943382A2 (de) * | 2005-09-09 | 2008-07-16 | L&P Property Management Company | Horizontale stepmaschine mit mehreren nadeln sowie verfahren |
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DE2650352C2 (de) | 1976-11-03 | 1978-12-07 | Pfaff Industriemaschinen Gmbh, 6750 Kaiserslautern | Nähmaschine mit einem oberhalb der Stichbildestelle angeordneten Greifer |
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DE102019219814A1 (de) * | 2019-12-17 | 2021-06-17 | Pfaff Industriesysteme Und Maschinen Gmbh | Stichbildungswerkzeug-Baugruppe für eine Nähanlage sowie Nähanlage mit einer derartigen Baugruppe |
-
2019
- 2019-12-17 DE DE102019219814.7A patent/DE102019219814A1/de active Pending
-
2020
- 2020-12-07 CN CN202080088393.XA patent/CN115087772B/zh active Active
- 2020-12-07 WO PCT/EP2020/084822 patent/WO2021122086A1/de active Application Filing
- 2020-12-07 US US17/785,442 patent/US11952692B2/en active Active
- 2020-12-07 EP EP20820873.6A patent/EP4077792B1/de active Active
- 2020-12-07 MX MX2022007375A patent/MX2022007375A/es unknown
- 2020-12-07 CA CA3162024A patent/CA3162024A1/en active Pending
- 2020-12-07 JP JP2022537610A patent/JP2023507439A/ja active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE667052C (de) | 1938-11-03 | Johann Eisenhofer | Naehnadel mit Fadenschneidkante | |
DE104963C (de) | 1897-05-18 | 1899-08-19 | The Singer Manucfacturing Company | Einrichtung zum Erweitern der Fadenschlingen bei Doppelkettenstich-Nähmaschinen |
DD111102A1 (de) | 1974-01-09 | 1975-01-20 | ||
DE2901582C2 (de) | 1978-02-13 | 1983-01-05 | Union Special Corp., Chicago, Ill. | Einstellvorrichtung für den auf einer elliptischen Bahn oszillierenden Greifer einer Nähmaschine |
DE3935779C1 (de) | 1989-10-27 | 1990-11-29 | Union Special Gmbh, 7000 Stuttgart, De | |
US6095069A (en) | 1994-11-23 | 2000-08-01 | Tadzhibaev; Zarif Sharifovich | Double-thread chain-stitch sewing machine |
EP1943382A2 (de) * | 2005-09-09 | 2008-07-16 | L&P Property Management Company | Horizontale stepmaschine mit mehreren nadeln sowie verfahren |
Also Published As
Publication number | Publication date |
---|---|
US20230013197A1 (en) | 2023-01-19 |
EP4077792A1 (de) | 2022-10-26 |
US11952692B2 (en) | 2024-04-09 |
JP2023507439A (ja) | 2023-02-22 |
CN115087772A (zh) | 2022-09-20 |
EP4077792B1 (de) | 2024-10-23 |
DE102019219814A1 (de) | 2021-06-17 |
CN115087772B (zh) | 2024-01-26 |
MX2022007375A (es) | 2022-07-12 |
CA3162024A1 (en) | 2021-06-24 |
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