EP4060106A1 - Machine à coudre, ainsi qu'ensemble de mise à niveau pour une machine à coudre - Google Patents

Machine à coudre, ainsi qu'ensemble de mise à niveau pour une machine à coudre Download PDF

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Publication number
EP4060106A1
EP4060106A1 EP22157645.7A EP22157645A EP4060106A1 EP 4060106 A1 EP4060106 A1 EP 4060106A1 EP 22157645 A EP22157645 A EP 22157645A EP 4060106 A1 EP4060106 A1 EP 4060106A1
Authority
EP
European Patent Office
Prior art keywords
sewing
measuring light
sensor
sewing machine
triangulation
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.)
Granted
Application number
EP22157645.7A
Other languages
German (de)
English (en)
Other versions
EP4060106B1 (fr
Inventor
Christian Lehwalder
Gerd Langreck
Sven Pfeiffer
Christoph Heckner
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.)
Duerkopp Adler GmbH
Original Assignee
Duerkopp Adler 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 Duerkopp Adler GmbH filed Critical Duerkopp Adler GmbH
Publication of EP4060106A1 publication Critical patent/EP4060106A1/fr
Application granted granted Critical
Publication of EP4060106B1 publication Critical patent/EP4060106B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B29/00—Pressers; Presser feet
    • D05B29/02—Presser-control devices
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B21/00—Sewing machines with devices for automatically controlling movement of work-carrier relative to stitch-forming mechanism in order to obtain particular configuration of seam, e.g. program-controlled for sewing collars or for attaching pockets
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B19/00—Program-controlled sewing machines
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B29/00—Pressers; Presser feet
    • D05B29/06—Presser feet
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
    • D06H3/00—Inspecting textile materials
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
    • D05D2305/00—Operations on the work before or after sewing
    • D05D2305/32—Measuring

Definitions

  • the invention relates to a sewing machine.
  • the invention also relates to a retrofit kit for a sewing machine.
  • a sewing machine in particular with components for detecting the thickness of the sewing material, is known from EP 1 777 331 B1 , the EP 1 479 809 B1 , the DE 3 724 506 C2 , the DE 20 2018 103 728 U1 , the DE 10 2010 063 068 A1 , the DE 10 2018 109 675 A1 , DE 10 2019 113 412 A1 , the DE 10 2019 116 580 A1 , the US 2011/0 226 170 A1 , the CN 103 866 496 A and the JP H05-269 285 A1 .
  • a triangulation sensor makes it possible to very precisely detect the thickness of the sewing material. This can be used for a variety of control tasks for sewing machine parameters and for sequential control of sewing processes.
  • An orientation of the triangulation plane to the sewing direction according to claim 2 enables a particularly compact beam guidance of the measuring light, which is not obstructed by sewing machine components.
  • the ratio A/B can be at most 1/8, at most 1/10, at most 1/12, at most 1/15 and also at most 1/20.
  • the distance ratio A/B is regularly greater than 1/100.
  • An embodiment according to claim 4 enables a hold-down foot lifting height to be adapted to a sewing material thickness measured with the thickness sensor.
  • the triangulation sensor can be in signal connection with a needle bar drive and/or with a foot lifting drive for a feed foot and/or for a presser foot of the sewing machine.
  • an automatic locating stitch function can be implemented, via which a needle tip is positioned just above the surface of the material to be sewn, for example, for exact locating of a puncture point.
  • a signal connection with the foot lift drive can be used to automatically specify a foot lift height, in particular when there is a change in material thickness in the course of the seam, for example for the adapted “climbing” of the feed foot and/or the presser foot. This results in an advantageously quiet sewing machine operation even with changing sewing material thicknesses.
  • An embodiment according to claim 5 enables an adaptation of a sewing material transport to the thickness of the sewing material measured by the thickness sensor.
  • the sewing material transport device can have a transport foot. This can be an upper transport and/or a lower transport. Alternatively or additionally, the material transport device can also have a needle transport.
  • a control device enables processing of sensor data and corresponding control of machine and/or process parameters.
  • the control device can also have a regulating function and compare stored target values with actual values measured by sensors and, depending on the result of the comparison, output control signals to machine components.
  • the assembly body can have at least one or also a plurality of adjustment screws, via which an adjustment in a corresponding number of degrees of freedom is made possible.
  • a sewing machine 1 has a top feed 2 and a C-shaped body 3.
  • the sewing machine 1 has a base 4 and an upper arm 5.
  • a post 6 connects the base 4 to the arm 5.
  • Inside the arm 5 is mounted and driven by an invisible arm shaft. From the rotation of the arm shaft, an up and down movement of a needle bar 8 with a sewing needle 9 and a movement of the top feed device 2 with a feed foot 10 are derived by mechanical coupling.
  • FIG. 1 shows the upper transport device 2 in a hold-down position for a thick fabric 11 to be sewn, which is also referred to as sewing material.
  • a presser foot 13 of the sewing machine 1 is used to hold down the fabric 11 in a stitch formation area 12.
  • the presser foot 13 is also referred to as a material hold-down foot.
  • the top feed device 2 has a movable linkage for the driven displacement of the presser foot 13 and the feed foot 10.
  • the presser foot 13 and the feed foot 10 contribute to the release of the fabric 11 for the top feed of this by alternately lifting from a hold-down position to a raised position.
  • the position of the presser foot 13 and the feed foot 10 in the raised position is set in the sewing machine 1 via a motor-driven adjusting wheel 14.
  • the adjusting wheel 14 is connected via a signal line 15 to a central control device 16 of the sewing machine 1 in signal connection.
  • the sewing machine 1 defines the stitch formation area 12.
  • the stitch formation area 12 also includes sections adjacent to a sewing needle piercing axis, in which an influencing of the sewn material 11 by the holding down the presser foot 13 on the one hand and holding down the transport foot 10 on the other hand.
  • the upper transport device 2 represents a sewing material transport device for transporting the sewing material 11 along the sewing direction 17.
  • a Cartesian xyz coordinate system is used below to facilitate the description of positional relationships.
  • the sewing direction 17 runs along the y-direction.
  • the x-direction runs along the arm 5 of the sewing machine.
  • the z-direction runs upwards parallel to the needle 9.
  • the needle 9 belongs to the stitch-forming tools for forming a seam in the sewn material 11, a gripper not shown in the drawing.
  • the latter is arranged below a needle plate 18, which in turn is part of a support plate 19 for the sewing material 11 on the base plate 4.
  • a thickness sensor 21 of the sewing machine 1 (see also FIG 2 and 3 ).
  • a distance between the detection area 20 and the stitch formation area 12 along the sewing direction y can be in the range between 5 mm and 100 mm and in particular in the range between 40 mm and 80 mm, for example in the range between 60 mm and 70 mm.
  • the thickness sensor 21 is designed as a triangulation sensor with a light source 22 for the measuring light 23 and a detector 24 for the measuring light 23 .
  • the measuring light detector 24 is designed in such a way that it detects the measuring light 23′ reflected and/or scattered by the sewing material 11 in the detection area 20, as shown schematically in FIG figure 1 clarified.
  • the thickness sensor 21 is designed in such a way that a direct incidence of the measuring light 23 in the detector 24, ie without intermediate reflection and/or scattering, is not possible.
  • the light source 22 can be a laser, in particular a semiconductor laser.
  • the light spot size on the detection area 20 of the measuring light 23 can be in the range between 0.5 mm and 3 mm and can be in the range between 1 mm and 2 mm, for example.
  • the measuring light detector 24 can be a CCD array or a CCD line.
  • a source center 25 of the light source 22, a center Z of the detection area 20 and a detector center 26 of the measuring light detector 24 precisely define a triangulation plane of the triangulation sensor 21.
  • This triangulation plane runs parallel to the xz plane.
  • the sewing direction 17 is perpendicular to this xz triangulation plane.
  • the three points 25, Z and 26, which define the xz triangulation plane, lie in the corners of an isosceles triangle which is a good approximation and has two longer legs B and one shorter leg A, as will be explained in more detail below.
  • the angle at which the spatially resolving measuring light detector 24 sees a light spot from the light source 22 on the material to be sewn 11 in the detection area 20 changes.
  • the thickness of the material to be sewn 11 is calculated as the distance between an upper side of the material to be sewn 11 and the needle plate 18 from the measured angular value, which was determined using the thickness sensor 21 , and is stored, for example, in a memory of the central control device 16 of the sewing machine 1 .
  • a distance A between light source 22 and measuring light detector 24, i.e. the shorter leg of the above-mentioned isosceles triangle for defining the triangulation plane, is less than one-fifth of a distance B between light source 22 and/or measuring light detector 24 on the one hand and the detection area 20 (with sewing material thickness 0) on the other hand, ie less than one fifth of the longer side of the mentioned isosceles triangle.
  • a ratio A/B of these two distances can be less than 1/5 and can be, for example, 1/8, 1/10 or even less. This A/B ratio is regularly greater than 1/100.
  • the distance B can range between 80 mm and 200 mm.
  • the thickness sensor 21 may be part of an aftermarket kit for the sewing machine 1 in which the thickness sensor 11 was not originally part of the standard equipment.
  • the retrofit kit also includes a mounting body 40 for mounting the thickness sensor 21 on a user-side head section of the arm 5 of the sewing machine 1.
  • the mounting body 40 is designed by means of at least one adjustment screw 42 so that the triangulation sensor 21 mounted on the head section 41 is opposite the head section 41 is adjustable.
  • Foreign body detection can also take place via the thickness sensor 21 . Fingers of an operator in particular can be detected by the thickness sensor 21 when entering the stitch formation area 12 from the front. Error detection or quality control during production is also possible via the thickness sensor 21 .
  • the thickness sensor 21 can be part of preventing error repetition (pokayoke mode of the sewing machine 1). In particular, an additional process control during operation of the sewing machine can be carried out in this way.
  • the thickness sensor 21 can also be designed in such a way that it detects a crease in the sewing material in the edge area of a sewing material, depending on which a specific sewing material process step is then initiated.
  • the thickness sensor 21 can also be used to detect other types of markings on the sewing material will. Also, for example, marking components that are connected to the sewn material, such as clips, can be detected via the thickness sensor 21.
  • the thickness sensor 21 can have a measuring cycle time which is at most 5 ms and which is in the range between 0.1 ms and 5 ms, for example in the range of 3 ms.
  • An accuracy of the sewing material thickness measurement can be better than 200 ⁇ m with the thickness sensor 21 and can be in the range of 100 ⁇ m or 50 ⁇ m.
  • the central control device 16 can have a memory in which thickness progression measurement curves are stored for specific sewn product variants, which specify target values that can be compared with actual values via the thickness sensor 21 during ongoing measurement operation. If the deviation is too great, an error signal can then be output via the thickness sensor 21 and the control device 16 .
  • Current measured values of the thickness sensor 21 can also be processed as part of a sliding averaging in the control device 16 and stored as a short-term average value in the form of a target value, which in turn is compared with later current actual values of the thickness sensor 21. This can also be used for error detection.
  • the signal connection with the stitch length adjustment wheel 36 and a corresponding stitch length specification can be used to take measured values from the thickness sensor 21 to adjust a stitch length up to an edge of the sewing material 11 .
  • a fan height for the feet 10, 13 can also be adjusted, adapted to a measured value for the thickness of the sewing material, which is detected by the thickness sensor 21.
  • the needle 9 can then automatically be placed directly above the material thickness measured by the thickness sensor 21 .
  • an automatic guide stitch function can be implemented.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP22157645.7A 2021-03-16 2022-02-21 Machine à coudre Active EP4060106B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202021101337.0U DE202021101337U1 (de) 2021-03-16 2021-03-16 Nähmaschine sowie Nachrüst-Bausatz für eine Nähmaschine

Publications (2)

Publication Number Publication Date
EP4060106A1 true EP4060106A1 (fr) 2022-09-21
EP4060106B1 EP4060106B1 (fr) 2024-04-17

Family

ID=80628712

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22157645.7A Active EP4060106B1 (fr) 2021-03-16 2022-02-21 Machine à coudre

Country Status (5)

Country Link
EP (1) EP4060106B1 (fr)
KR (1) KR20220002279U (fr)
CN (1) CN217809934U (fr)
DE (1) DE202021101337U1 (fr)
TW (1) TWM643929U (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN121737931A (zh) * 2024-09-27 2026-03-27 杰克科技股份有限公司 一种布料过梗检测缝制装置及方法

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3724506C2 (fr) 1987-07-24 1993-05-13 Duerkopp Adler Ag, 4800 Bielefeld, De
JPH05269285A (ja) 1992-03-24 1993-10-19 Juki Corp 布端または布段検出器
EP1479809B1 (fr) 2003-05-22 2006-12-13 Dürkopp Adler Aktiengesellschaft Machine à coudre avec un capteur de mesure de l'épaisseur du tissu
EP1777331A1 (fr) 2005-10-18 2007-04-25 Dürkopp Adler Aktiengesellschaft Machine à coudre
US20110226170A1 (en) 2010-03-19 2011-09-22 Brother Kogyo Kabushiki Kaisha Sewing machine and non-transitory computer-readable medium storing sewing machine control program
DE102010063068A1 (de) 2010-03-31 2011-10-06 Lear Corporation Nähmschine und ein Betriebsverfahren
CN103866496A (zh) 2014-03-31 2014-06-18 新杰克缝纫机股份有限公司 缝纫机用缝料检测装置及压脚高度自动调节系统
DE102018109675A1 (de) 2017-04-21 2018-10-25 Juki Corporation Nähmaschine und Nähverfahren
DE202018103728U1 (de) 2018-06-29 2019-10-09 Vorwerk & Co. Interholding Gmbh Nähmaschine für den häuslichen Gebrauch
DE102019113412A1 (de) 2018-05-21 2019-11-21 Juki Corporation Nähsystem und Vorrichtung zum dreidimensionalen Messen
DE102019116580A1 (de) 2018-06-20 2019-12-24 Juki Corporation Nähmaschine und Nähverfahren

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3724506C2 (fr) 1987-07-24 1993-05-13 Duerkopp Adler Ag, 4800 Bielefeld, De
JPH05269285A (ja) 1992-03-24 1993-10-19 Juki Corp 布端または布段検出器
EP1479809B1 (fr) 2003-05-22 2006-12-13 Dürkopp Adler Aktiengesellschaft Machine à coudre avec un capteur de mesure de l'épaisseur du tissu
EP1777331A1 (fr) 2005-10-18 2007-04-25 Dürkopp Adler Aktiengesellschaft Machine à coudre
EP1777331B1 (fr) 2005-10-18 2008-01-23 Dürkopp Adler Aktiengesellschaft Machine à coudre
US20110226170A1 (en) 2010-03-19 2011-09-22 Brother Kogyo Kabushiki Kaisha Sewing machine and non-transitory computer-readable medium storing sewing machine control program
DE102010063068A1 (de) 2010-03-31 2011-10-06 Lear Corporation Nähmschine und ein Betriebsverfahren
CN103866496A (zh) 2014-03-31 2014-06-18 新杰克缝纫机股份有限公司 缝纫机用缝料检测装置及压脚高度自动调节系统
DE102018109675A1 (de) 2017-04-21 2018-10-25 Juki Corporation Nähmaschine und Nähverfahren
DE102019113412A1 (de) 2018-05-21 2019-11-21 Juki Corporation Nähsystem und Vorrichtung zum dreidimensionalen Messen
DE102019116580A1 (de) 2018-06-20 2019-12-24 Juki Corporation Nähmaschine und Nähverfahren
DE202018103728U1 (de) 2018-06-29 2019-10-09 Vorwerk & Co. Interholding Gmbh Nähmaschine für den häuslichen Gebrauch

Also Published As

Publication number Publication date
EP4060106B1 (fr) 2024-04-17
KR20220002279U (ko) 2022-09-23
DE202021101337U1 (de) 2022-06-20
TWM643929U (zh) 2023-07-21
CN217809934U (zh) 2022-11-15

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