EP3206981B1 - Befestigung für einen doffergreifer - Google Patents

Befestigung für einen doffergreifer Download PDF

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Publication number
EP3206981B1
EP3206981B1 EP15775511.7A EP15775511A EP3206981B1 EP 3206981 B1 EP3206981 B1 EP 3206981B1 EP 15775511 A EP15775511 A EP 15775511A EP 3206981 B1 EP3206981 B1 EP 3206981B1
Authority
EP
European Patent Office
Prior art keywords
doffer
gripper
elastic retaining
spring
spring element
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
EP15775511.7A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3206981A1 (de
Inventor
Robert Nägeli
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.)
Maschinenfabrik Rieter AG
Original Assignee
Maschinenfabrik Rieter AG
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 Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Publication of EP3206981A1 publication Critical patent/EP3206981A1/de
Application granted granted Critical
Publication of EP3206981B1 publication Critical patent/EP3206981B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H9/00—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine
    • D01H9/001—Bobbin-taking arrangements
    • D01H9/003—Graspers operating under the action of a fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
    • B65H67/06—Supplying cores, receptacles, or packages to, or transporting from, winding or depositing stations
    • B65H67/068—Supplying or transporting empty cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to a doffer gripper for attachment to a doffer beam, comprising a fastening element, which comprises two spaced apart elastic retaining tabs and arranged between the elastic retaining tabs rigid support member, wherein the two elastic retaining tabs connected at a first end to the fastening element are and are positioned with a second free end in each case via at least one spring element in a rest position.
  • the spinning machines have a doffer device with a doffer bar, which is arranged movably on the spinning machine, for example via a scissors mechanism.
  • a plurality of doffer grippers are arranged on the doffer bar in order to be able to grasp and remove the sleeves together or put them on.
  • the individual doffer grippers are preferably pneumatically actuated and include a pressurizable membrane, which is brought over the sleeves and then engages the sleeves by introducing compressed air.
  • air supply ducts are arranged in the doffer bar, from which the compressed air is led via feeds to the individual membranes of the doffer gripper.
  • the invention now has the object to eliminate this drawback of the known Doffergreifers.
  • the at least one spring element is formed integrally with the free end of the respective elastic retaining tab and the rigid support member.
  • integral means that the spring element is fixedly connected to the free end of the respective elastic retaining tab and the rigid support member.
  • the at least one spring element is made of an elastic plastic. This has the advantage that the elastsiche spring element is molded onto the respective elastic retaining tab and the rigid support member. The fastener, the elastic retaining tabs, the rigid support member and the spring element can thus in one operation from a single Injection molded part are produced. The production costs of the doffing gripper can be further reduced thereby.
  • the at least one spring element in the direction of the free ends of the elastic retaining tabs has a width of 2-10mm.
  • the respective elastic retaining tab has sufficient rigidity in its rest position and is held in this position.
  • the spring element exerts a high spring force on the respective elastic retaining tab when deflected from its rest position. A sufficient clamping action of the elastic retaining tabs on the doffer bar is thus ensured.
  • the at least one spring element in the rest position has a curvature or pre-bend in its longitudinal direction.
  • the longitudinal direction represents the direction in which the spring element exerts a spring force on the elastic retaining tab.
  • the spring element is thereby pre-bent in the rest position, that is, the spring element is in the rest position outside a vertical plane, which runs parallel to the two end faces of the elastic retaining tabs.
  • each one spring element is arranged on one of the two end faces of the respective elastic retaining tab.
  • each one spring element is arranged on one of the two end faces of the respective elastic retaining tab.
  • the two spring elements are each integrally connected via a connecting piece with a side surface of the fastening element.
  • the connector extends in the direction of the free end of the elastic retaining tabs and is integrally connected to the rigid support member and the side surface of the fastener. The connector ensures high stability of the doffer gripper.
  • the side surface of the fastening element has a curvature in its longitudinal direction.
  • the curvature advantageously corresponds to the curvature of the spring element in its rest position.
  • the curvature on the side surface of the fastener has a positive effect on the production of Doffergreifers.
  • Fig. 1 shows a doffer gripper belonging to the prior art 1.
  • the doffer gripper 1 is made of plastic and has a cylindrical receptacle 2 for a coil or bobbin, not shown.
  • a pneumatically adjustable clamping element 3 is arranged in the cylindrical receptacle 2. With the clamping element 3, it is possible to detect the end region of the introduced into the interior of the Doffergreifers 1 coil or bobbin tube from the outside.
  • the doffer gripper 1 comprises a fastening element 5 with two elastic retaining tabs 6a, 6b arranged at a distance from one another.
  • the elastic retaining tabs 6a, 6b are connected to the fastening element 5 with a first end 27a, 27b.
  • the fastening element 5 between the elastic retaining tabs 6a, 6b, a rigid support member 7, in which an air duct 8 for the air supply of the pneumatically adjustable clamping member 3 and a cylindrical cavity 9 for receiving an elastic sealing element 10 are arranged ( Fig.3 and Fig.4 ).
  • the doffer gripper 1 via the elastic retaining tabs 6a, 6b disengaged and releasably attachable to the doffer bar 4.
  • the doffer bar 4 has on its surface an upper and a lower latching groove 11a, 11b, which extends in the longitudinal direction of the doffer bar 4.
  • the two locking grooves 11a, 11b each have a profile of mutually parallel lugs 12a, 12b, in which the elastically deformable retaining tabs 6a, 6b engage with their free end 13a, 13b.
  • About the two locking grooves 11 a, 11 b is a plurality of doffer grippers 1 side by side releasably and latched to the doffer bar 4 attachable.
  • the holding or clamping action of the elastic retaining tabs 6a, 6b in the respective latching groove 11a, 11b is increased or supported by a replaceable steel spring 14a, 14b latched underneath the elastic retaining tab 6a, 6b.
  • the steel spring 14a, 14b is designed U-shaped. With its first leg 15a, 15b, the steel spring 14a, 14b rests on the rigid support element 7. With its second leg 16a, 16b, the steel spring 14a, 14b positions the free end 13a, 13b of the elastic retaining tab 6a, 6b in a rest position (FIG. Fig.2 and Figure 3 ).
  • the elastic retaining tabs 6a, 6b are compressed in the direction of the rigid support element 7, ie the elastic retaining tabs 6a, 6b are deflected out of their rest position.
  • the steel spring 14a, 14b is stretched.
  • the elastic retaining tabs 6a, 6b are released again, ie the force applied externally to the elastic retaining tabs 6a, 6b is removed.
  • the free end 13a, 13b of the elastic retaining tab 6a, 6b by the restoring force of the steel spring 14a, 14b against the lugs 12a, 12b of the locking groove 11a, 11b pressed ( Figure 4 ).
  • the stiffness or the clamping effect of the elastic retaining tabs 6a, 6b can thus be adjusted to the desired value via the steel spring 14a, 14b.
  • a major disadvantage of the doffer gripper 1 described is that the doffer gripper 1 due to the additional steel spring 14a, 14b has a complex structure, whereby the production costs of the doffer gripper 1 are relatively high.
  • FIG. 5 1 shows a perspective view of a doffer gripper 1 according to the invention.
  • the doffer gripper 1 is like the known doffer gripper (FIG. Fig.1 ) made of plastic and has a cylindrical receptacle 2 for a coil, not shown, or bobbin tube.
  • a pneumatically adjustable clamping element 3 is arranged in the cylindrical receptacle 2. With the clamping element 3, it is possible to detect the end region of the introduced into the interior of the Doffergreifers 1 coil or bobbin tube from the outside.
  • the doffer gripper 1 For fastening the doffer gripper 1 to a doffer bar 4, the doffer gripper 1, like the known doffer gripper, comprises a fastening element 5 with two elastic retaining tabs 6a, 6b arranged at a distance from one another.
  • the elastic retaining tabs 6a, 6b are connected to the fastening element 5 with a first end 27a, 27b.
  • a rigid support element 7 is arranged on the fastening element 5, in which an air duct 8 for the air supply of the pneumatically adjustable clamping element 3 and a cylindrical cavity 9 for receiving an elastic sealing element 10 are arranged ( Figure 7 ).
  • the doffer gripper 1 is like the well-known doffer gripper ( Figure 4 ) via the elastic retaining tabs 6 a, 6 b disengaged and releasably attachable to the doffer bar 4.
  • the doffer gripper 1 in contrast to the known doffer gripper on no additional steel springs.
  • a spring element 18a, 18b made of plastic is arranged in the embodiment of the doffer gripper 1 according to the invention at the two end faces 17a, 17b of the elastic retaining tabs 6a, 6b.
  • the doffer gripper 1 thus has four spring elements ( Figure 7 ).
  • the spring element 18a, 18b is integrally connected to the free end 13a, 13b of the elastic retaining tab 6a, 6b and a connecting piece 19.
  • the connecting piece 19 is part of the rigid support element 7 and extends in the direction of the free end 13a, 13b of the elastic retaining tabs 6a, 6b.
  • the connecting piece 19 is integrally connected to a side surface 20 of the fastening element 5.
  • the spring elements 18a, 18b are thus firmly integrated into the fastening element 5 and position the free end 13a, 13b of the elastic retaining tab 6a, 6b in a rest position.
  • the spring element 18a, 18b has a width 21 of 5 mm in the direction of the free end 13a, 13b of the elastic retaining tabs 6a, 6b.
  • a free gap 22 remains between the spring element 18a, 18b and the side surface 20 of the fastening element 5.
  • the spring element 18a, 18b has in its rest position in its longitudinal direction a curvature 23 or pre-bend (FIG. Figure 7 ).
  • the side surface 20 of the fastener 5 has a curvature 24 which is formed to match the curvature 23 of the spring element 18a, 18b.
  • the elastic holding straps 6a, 6b are compressed in the direction of the rigid support element 7, ie the elastic holding straps 6a, 6b are deflected out of their rest position (dashed line 25a, 25b in FIG Figure 7 ).
  • the spring elements 18a, 18b according to the dashed line 26a, 26b in Figure 7 further bent or stretched.
  • the elastic retaining tabs 6a, 6b are released again, ie the force applied externally to the elastic retaining tabs 6a, 6b is removed again.
  • the free end 13a, 13b of the elastic retaining tabs 6a, 6b pressed by the restoring force of the spring elements 18a, 18b against the lugs 12a, 12b of the locking groove 11a, 11b.
  • the stiffness or the clamping action of the elastic retaining tabs 6a, 6b can thus be adjusted to the desired value via the spring elements 18a, 18b made of plastic by means of a corresponding geometric design.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Clamps And Clips (AREA)
  • Buckles (AREA)
EP15775511.7A 2014-10-16 2015-09-29 Befestigung für einen doffergreifer Active EP3206981B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH01585/14A CH710261A1 (de) 2014-10-16 2014-10-16 Befestigung für einen Doffergreifer.
PCT/IB2015/057440 WO2016059496A1 (de) 2014-10-16 2015-09-29 Befestigung für einen doffergreifer

Publications (2)

Publication Number Publication Date
EP3206981A1 EP3206981A1 (de) 2017-08-23
EP3206981B1 true EP3206981B1 (de) 2018-09-05

Family

ID=54256800

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15775511.7A Active EP3206981B1 (de) 2014-10-16 2015-09-29 Befestigung für einen doffergreifer

Country Status (4)

Country Link
EP (1) EP3206981B1 (zh)
CN (1) CN106795659B (zh)
CH (1) CH710261A1 (zh)
WO (1) WO2016059496A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH715389A1 (de) 2018-09-27 2020-03-31 Rieter Ag Maschf Greifer zum Greifen einer Spule oder Spulenhülse.
CN110438605A (zh) * 2019-09-10 2019-11-12 江阴市华方智能纺机装备有限公司 一种新型细纱机抓管器

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5172540A (en) * 1987-08-18 1992-12-22 Rieter Machine Works, Ltd. Apparatus for changing bobbin tubes and tube gripper therefor
JPS6452827A (en) * 1987-08-18 1989-02-28 Rieter Ag Maschf Bobbin replacing apparatus in fiber machine such as ring fine spinning frame
DE4037312C2 (de) * 1990-11-23 1994-03-10 Zinser Textilmaschinen Gmbh Vorrichtung zum Greifen einer leeren Hülse oder einer vollen Spule
DE4122780A1 (de) * 1991-07-10 1993-01-14 Zinser Textilmaschinen Gmbh Aussengreifer zum greifen von fasergarntraegern an spinn- oder zwirnmaschinen
CN2873813Y (zh) * 2006-01-04 2007-02-28 东台纺织机械有限责任公司 细纱机集体落纱装置的握纱器
CN200992611Y (zh) * 2007-01-05 2007-12-19 铜陵市松宝机械有限公司 用于细纱机的抓管器
CN201010733Y (zh) * 2007-03-22 2008-01-23 铜陵市精特机械有限责任公司 一种气缸式抓管装置
DE102010027904A1 (de) * 2010-04-19 2011-10-20 Hilti Aktiengesellschaft Befestigungsvorrichtung für Anbauteile an Montageschienen
CN102477599A (zh) * 2010-11-30 2012-05-30 青岛云龙纺织机械有限公司 细纱机自动落纱机械臂装置
WO2012125360A2 (en) * 2011-03-17 2012-09-20 A. Raymond Et Cie Smart material actuated fasteners
DE102011111905A1 (de) * 2011-08-30 2013-02-28 Daimler Ag Bauteil aus mindestens zwei Profilelementen
DE102012104667A1 (de) * 2012-05-30 2013-12-05 Maschinenfabrik Rieter Ag Vorrichtung zum gemeinsamen Wechseln einer Mehrzahl von Hülsen an einer Textilmaschine mit einem Greiferbalken
CN103741287A (zh) * 2013-11-29 2014-04-23 吴江市大业丝绸整理有限公司 一种落纱机拨纱装置

Also Published As

Publication number Publication date
CN106795659B (zh) 2019-05-17
WO2016059496A1 (de) 2016-04-21
CN106795659A (zh) 2017-05-31
EP3206981A1 (de) 2017-08-23
CH710261A1 (de) 2016-04-29

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