EP3754085B1 - Textilmaschine sowie verfahren zum betrieb einer textilmaschine - Google Patents

Textilmaschine sowie verfahren zum betrieb einer textilmaschine Download PDF

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Publication number
EP3754085B1
EP3754085B1 EP20162584.5A EP20162584A EP3754085B1 EP 3754085 B1 EP3754085 B1 EP 3754085B1 EP 20162584 A EP20162584 A EP 20162584A EP 3754085 B1 EP3754085 B1 EP 3754085B1
Authority
EP
European Patent Office
Prior art keywords
bobbin
gripper
holding
sewing machine
transport device
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
EP20162584.5A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3754085A1 (de
Inventor
Hans-Rochus Gross
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.)
Naehmaschinenfabrik Emil Stutznaecker GmbH and Co KG
Original Assignee
Naehmaschinenfabrik Emil Stutznaecker GmbH and Co KG
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Filing date
Publication date
Application filed by Naehmaschinenfabrik Emil Stutznaecker GmbH and Co KG filed Critical Naehmaschinenfabrik Emil Stutznaecker GmbH and Co KG
Publication of EP3754085A1 publication Critical patent/EP3754085A1/de
Application granted granted Critical
Publication of EP3754085B1 publication Critical patent/EP3754085B1/de
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Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B59/00—Applications of bobbin-winding or -changing devices; Indicating or control devices associated therewith
    • D05B59/04—Devices for changing the bobbin

Definitions

  • the invention relates to a sewing machine, preferably a lockstitch sewing machine, with a gripper that is rotatable about an axis of rotation and has a receptacle, a bobbin that provides a bobbin thread and can be inserted into the receptacle, in particular with a bobbin case or a bobbin case, and a device for Feeding the spool into the receptacle, the spool being rotatably arranged in the receptacle.
  • the invention relates to a method for operating a sewing machine, preferably a lockstitch sewing machine, wherein a bobbin thread is provided during operation of the sewing machine, which bobbin is arranged rotatably in a receptacle of a gripper, and wherein the bobbin is fed to the receptacle by means of a device or taken from the recording.
  • the EP 1 751 339 B1 relates to a device on sewing or embroidery machines for changing the bobbin for the looper thread.
  • the bobbin is received in a conventional manner in a bobbin case.
  • This bobbin case is inserted into a receptacle in the gripper.
  • the gripper has an axial pin which has an incision at its free end. This incision can be reached from behind by a locking slide of the bobbin case, so that the bobbin case is then held on the gripper.
  • the locking slide of the bobbin is actuated in a known manner by a bobbin case flap.
  • a transport device is provided structurally separate from this holding device for the bobbin case. This has a mechanism to open the bobbin case flap and thus release the bobbin case from the holder in the gripper.
  • the transport device is designed to be translationally movable.
  • the DE 100 28 231 B4 takes up the idea of a magnetic holder for the bobbin case.
  • the bobbin case has a magnet centrally on its outward-facing wall which cooperates with the free end of a pin present in the receptacle in the gripper. This arrangement forms the holding means for the bobbin case.
  • a transport device with which the bobbin case can be transported out of the receptacle in the gripper is provided structurally separate from this. This transport device can be moved in a translatory manner and also has a magnet whose force exerted on the bobbin case is greater than the magnetic force developed between the pin and the magnet of the bobbin.
  • the DE 10 2012 108 412 A1 finally discloses a sewing machine.
  • This has a gripper that is driven by a hollow shaft.
  • a piston is movably supported in the axial direction in the hollow shaft.
  • the piston has an electromagnet which can interact with permanent magnets arranged on the bobbin cases.
  • the piston conveys a bobbin case from a magazine through the hollow shaft to the gripper.
  • the electromagnet on the piston is energized in such a way that it generates an attractive magnetic field.
  • the electromagnet is energized in such a way that the permanent magnet of the bobbin case and the electromagnet of the piston repel each other. In this way, the bobbin case is held in the hook while sewing.
  • U.S. 5,718,181 A a further sewing machine which has a gripper which is rotatable about an axis of rotation and which has a receptacle. Furthermore, a bobbin is provided which provides a lower thread and can be inserted into the receptacle, in particular with a bobbin case or a bobbin housing.
  • This known sewing machine has a device for feeding the bobbin into the receptacle on, wherein the coil is rotatably arranged in the receptacle.
  • these coil feed devices are arranged on a U-shaped frame which is mounted rotatably about a pivot point.
  • the invention proposes a sewing machine with the features of claim 1.
  • the invention provides that the device for feeding the bobbin for receiving in the gripper has two holding and transport devices, each of which can be moved alternately between two positions and the bobbin with bobbin thread from one first position outside the gripper into a second position in the gripper or without a bobbin thread from the second position in the gripper into the first position outside the gripper.
  • the design of the device with two holding and transport devices makes it possible, in a first step, to use a holding and transport device to insert a filled bobbin, i.e. a bobbin with a wound bobbin thread, into the corresponding holder of the gripper.
  • the holding and transport device is designed for transporting the bobbin and also for holding the bobbin in the gripper, provided that the holding and transport device has, for example, the so-called glasses, which are plate-shaped and the gripper when inserted Covers the bobbin so that the bobbin cannot fall out of the gripper.
  • the bobbin is usually arranged in a bobbin case which can be inserted into the gripper together with the bobbin.
  • the sewing machine according to the invention in such a way that the gripper and the bobbin case form an integral component, a bobbin case with the bobbin arranged therein being inserted into the bobbin case. In this case, the holding and transport device transports the bobbin case with the bobbin arranged therein.
  • the second holding and transport device can be equipped with a filled bobbin (or bobbin case).
  • the sewing machine is stopped and the holding and transport device swivels back from its position with the bobbin secured in the gripper to the position outside the gripper, so that the emptied bobbin is replaced by a new, filled bobbin can.
  • the second holding and transport device with a filled bobbin moves from the first position outside the gripper to the second position in the gripper and secures the filled bobbin in the gripper so that the sewing work can be continued with the sewing machine.
  • the main advantage of the sewing machine according to the invention is that only a short downtime is required for changing the bobbin.
  • the empty bobbins can be changed during the operation of the sewing machine, provided that empty bobbins are transferred by a holding and transport device into a position in which the bobbins can be removed without problems and without risk, if necessary with a bobbin case or a bobbin case the sewing machine continues to work on the basis of a bobbin with bobbin thread inserted into the hook.
  • a bobbin or a bobbin case with a bobbin cannot only be changed when the bobbin has no thread at all, but also when there is still a residual amount of thread on the bobbin.
  • the holding and transport device receives the bobbin together with a bobbin case in a receptacle and in the second position closes the gripper with the bobbin inserted leaving a gap.
  • This is the embodiment with the so-called glasses, which cover the gripper when the bobbin case and bobbin are inserted and hold the bobbin case in a rotationally fixed manner relative to the gripper, while the bobbin is rotatably mounted in the bobbin case.
  • An upper thread loop slips through the gap, which is guided by the hook and the bobbin case.
  • each holding and transport device has a carrier arm which is arranged on a frame so that it can pivot about an axis of rotation.
  • Each support arm is pivotably arranged on the frame.
  • Each support arm preferably has a drive, for example a pneumatically or hydraulically driven linear motor.
  • rotary drives are also conceivable.
  • a first support arm is U-shaped with two legs and a web connecting the legs and that a second support arm can be passed between the legs of the first support arm.
  • the movement of the two holding and transport devices can be superimposed in such a way that the transfer of a holding and transport device with a bobbin with a bobbin from the first position outside the gripper to the second position in the gripper can already be carried out if the second holding and transport device is transferred from the second position in the gripper to the first position outside the gripper. This can significantly reduce the downtimes of the sewing machine.
  • the bobbin is rotatably arranged in a bobbin case and that the gripper is formed in one piece with the bobbin housing, into which the bobbin and bobbin case can be inserted.
  • the holding and transport devices have connection means for coupling to a bobbin or bobbin case, each connection means being designed to be switchable between a configuration that couples the bobbin or bobbin case and a configuration that releases the bobbin or bobbin case.
  • These connecting means prevent the coil from falling out of the holding and transport devices during the movement thereof.
  • the connecting means are released when the respective first or second position of a holding and transport device is reached, which simplifies removal of an empty bobbin and replacement of a bobbin filled with a bobbin thread.
  • a holding magnet is not switched off in the position in which the bobbin cases can be replaced manually.
  • a bobbin case must be pulled off against the magnetic force of the holding magnet.
  • the connecting means is a magnetic, pneumatic and / or mechanical connecting means.
  • the object is achieved by the features of claim 7 .
  • two holding and transport devices of the device are moved alternately between two positions and a bobbin with bobbin thread is transferred from a first position outside the gripper to a second position in the gripper and that a bobbin is previously transferred from the second position in the gripper to the first position outside of the gripper without a bobbin thread.
  • a holding and transport device is equipped with a bobbin having a bobbin thread and then moved into a position in which the bobbin is arranged within the gripper, so that the bobbin thread corresponds to the sewing process can be withdrawn from the bobbin and processed during sewing.
  • a second holding and transport device is located in a first position outside the gripper during the sewing process and can be equipped with a bobbin with bobbin thread. If the bobbin thread from the bobbin inside the hook is now used up by the sewing process, it is necessary that a new bobbin thread is made available in the hook.
  • the holding and transport device with the bobbin in the gripper is transferred from this position to the first position, while subsequently or simultaneously the holding and transport device with the previously inserted bobbin with bobbin thread is transferred from the first position to the second position in which the bobbin with bobbin thread is arranged in the hook.
  • the empty bobbin can then be removed from the first holding and transport device and replaced with a new bobbin filled with bobbin thread, so that this holding and transport device is prepared to be transferred to the second position again in a next step, in which the bobbin with bobbin thread is arranged in the hook.
  • a bobbin or a bobbin case with a bobbin cannot only be changed when the bobbin has no thread at all, but also when there is still a residual amount of thread on the bobbin.
  • each holding and transport device is pivoted about an axis aligned transversely to the axis of rotation of the gripper and the bobbin is arranged exchangeably on the holding and transport device, the bobbin case at least during the movement of the holding and transport device between the first and the second position with the Holding and transport device is connected standing in mechanical contact.
  • FIGs 1a to 6b an embodiment of a device 1 for feeding a bobbin 2 into the receptacle 3 of a gripper 4 of a sewing machine (not shown in detail) is shown.
  • the Figures 1a to 6b show the device 1 in different positions during the course of a method for operating a sewing machine, with a bobbin thread being provided by the bobbin 2 during operation of the sewing machine, which bobbin 2 is rotatably arranged in the receptacle 3 of the hook 4.
  • the device 1 consists of a support frame 5 and two holding and transport devices 6, 7 arranged thereon.
  • the support frame 5 is U-shaped in cross section and accordingly has two legs 8 and a web 9 connecting the legs 8. Overall, the support frame 5 is box-shaped and not closer to one illustrated sewing machine screwed.
  • the holding and transport device 6 is attached to the support frame 5 such that it can pivot about an axis of rotation 10.
  • the holding and transport device 7 is also arranged on the support frame 5 so as to be pivotable about an axis of rotation 11, the axes of rotation 10 and 11 running parallel to one another and being arranged one above the other in the carrier frame 5.
  • Both holding and transport devices 6, 7 are provided to each receive a reel 2 and alternately feed it to the receptacle 3 or to remove a reel 2 from the receptacle 3.
  • a first position is shown in such a way that the holding and transport device 6 has so-called glasses 12 at the end, which can be connected to a bobbin case 13, the connection between bobbin case 13 and glasses 12 being made, for example, magnetically.
  • the glasses 12 are plate-shaped and cover the receptacle 3 in the gripper 4 as long as the holding and transport device 6, 7 is pivoted into the second position.
  • the bobbin case 13 is, among other things, in the Figures 2a and 2b to be recognized and serves to accommodate a bobbin 2, the bobbin 2 being rotatably mounted relative to the bobbin case 13.
  • the bobbin case 13 is non-rotatably connected to the glasses 12.
  • FIGS. 1a and 1b show the holding and transport device 7 in its second position in such a way that the bobbin 2 is inserted into the receptacle 3 of the gripper 4, so that during the sewing process and the associated rotary drive of the gripper 4, the lower or Bobbin thread can be used for sewing.
  • the holding and transport device 6 is moved into the first position so that a bobbin case 13 with a bobbin 2 arranged therein can be placed on the glasses 12 and connected to it, as shown in FIG Figures 2a and 2b is shown.
  • the holding and transport device 6 is according to the Figures 2a and 2b provided with a bobbin 2 having a bobbin thread and thus provided for a subsequent processing step.
  • the holding and transport device 7 is pivoted downwards so that the gripper 4 is prepared for receiving a new reel 2 which is arranged on the glasses 12 of the holding and transport device 7.
  • the holding and transport device 6 is pivoted in such a way that the bobbin case 13 with the bobbin 2, which is arranged on the glasses 12 of the holding and transport device 6, is pivoted into the receptacle 3 of the gripper 4.
  • the bobbin case 13 can be removed from the glasses 12 on the holding and transport device 7, as shown in FIG Figures 5a and 5b is shown.
  • the empty bobbin 2 is according to the Figures 6a and 6b replaced by a new bobbin 2 filled with the bobbin thread in a bobbin case 13.
  • the sewing machine is stopped and the bobbin case 13 is pivoted out of the receptacle 3 by moving the holding and transport device 6 into the first position .
  • the holding and transport device 7 with the prepared bobbin case 13 and a bobbin 2 filled with a bobbin thread is then alternately pivoted into the receptacle 3 of the gripper 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP20162584.5A 2019-06-18 2020-03-12 Textilmaschine sowie verfahren zum betrieb einer textilmaschine Active EP3754085B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019116511.3A DE102019116511A1 (de) 2019-06-18 2019-06-18 Textilmaschine sowie Verfahren zum Betrieb einer Textilmaschine

Publications (2)

Publication Number Publication Date
EP3754085A1 EP3754085A1 (de) 2020-12-23
EP3754085B1 true EP3754085B1 (de) 2021-06-23

Family

ID=70008256

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20162584.5A Active EP3754085B1 (de) 2019-06-18 2020-03-12 Textilmaschine sowie verfahren zum betrieb einer textilmaschine

Country Status (3)

Country Link
EP (1) EP3754085B1 (zh)
CN (1) CN111575928B (zh)
DE (1) DE102019116511A1 (zh)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH332443A (de) * 1953-04-09 1958-09-15 Messerschmitt Ag Greifer für Nähmaschinen
US5143004A (en) * 1987-11-25 1992-09-01 Mardix Bar Cochva Sewing apparatus including automatic bobbin reloading
KR100385795B1 (ko) * 1995-01-18 2003-08-21 쥬키 가부시키가이샤 보빈교환기
DE10028231B4 (de) * 2000-05-27 2004-11-04 Philipp Moll Einrichtung an Näh- oder Stickmaschinen zum Wechseln der Spule für den Greiferfaden
DE102004018935B4 (de) * 2004-04-16 2008-01-03 Philipp Moll Einrichtung an Näh- oder Stickmaschinen zum Wechseln der Spule für den Greiferfaden
DE102012108412A1 (de) * 2012-09-10 2014-04-10 Sekip Surget Einrichtung zum Wechseln der Unterfadenspule
CN103643413B (zh) * 2013-11-29 2014-09-24 宁波舒普机电科技有限公司 一种更换缝纫机底梭的方法
DE102015106886B3 (de) * 2015-05-04 2016-06-23 Nähmaschinenfabrik Emil Stutznäcker GmbH & Co. KG Nähmaschine sowie Verfahren zum Betrieb einer Nähmaschine
JP6148699B2 (ja) * 2015-07-27 2017-06-14 木下精密工業株式会社 自動ボビン交換装置
DE102016005166A1 (de) * 2016-04-30 2017-11-02 Pfaff Industriesysteme Und Maschinen Gmbh Nähmaschine mit einer Spulenkapselwechseleinrichtung

Also Published As

Publication number Publication date
DE102019116511A1 (de) 2020-12-24
CN111575928B (zh) 2021-11-02
CN111575928A (zh) 2020-08-25
EP3754085A1 (de) 2020-12-23

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