EP1371763B1 - Yarn-braking device for weaving machines - Google Patents
Yarn-braking device for weaving machines Download PDFInfo
- Publication number
- EP1371763B1 EP1371763B1 EP03010532A EP03010532A EP1371763B1 EP 1371763 B1 EP1371763 B1 EP 1371763B1 EP 03010532 A EP03010532 A EP 03010532A EP 03010532 A EP03010532 A EP 03010532A EP 1371763 B1 EP1371763 B1 EP 1371763B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- yarn
- spindle
- eyelets
- main housing
- braking
- 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.)
- Expired - Lifetime
Links
- 238000009941 weaving Methods 0.000 title claims description 4
- 210000003739 neck Anatomy 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
- D03D47/34—Handling the weft between bulk storage and weft-inserting means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
- B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
- B65H59/20—Co-operating surfaces mounted for relative movement
- B65H59/26—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path
- B65H59/32—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path the surfaces being urged away from each other
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2555/00—Actuating means
- B65H2555/20—Actuating means angular
- B65H2555/23—Actuating means angular magnetic, e.g. rotary solenoids
-
- 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 present invention relates to a yarn-braking device for weaving machines.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Description
- The present invention relates to a yarn-braking device for weaving machines.
- A known braking device, as described in the prior Italian Patent of Industrial Invention No. 01303154 of the same applicant (Ep-A-0 972 734), comprises a triad of stationary, coaxial yarn-guide eyelets, which are passed through by the yarn which, in the span between the eyelets, follows a rectilinear path. A rocking lever is fastened to a U-shaped braking member, which is arranged astride of the middle eyelet for engaging the yarn, during braking, on its free lengths between the middle eyelet and the end eyelets. The lever is linked to the rod of a linear motor which, when operated, causes it to rock. The lever, by deviating the yarn from its rectilinear path, causes it to brake due to friction.
- Although such known device provides an adequate response in terms of reaction to the rapid variations of mechanical tension of the yarn, however it is unsatisfactory from the point of view of its adaptability to different kinds of yarn. In fact, depending on the degree of'dryness" of the yarn, stronger or weaker braking actions can be tolerated.
- Therefore, a main object of the present invention is to provide a yarn-braking device for weaving machines which is adjustable in respect of the kind of yarn, so that stronger or weaker braking actions will be provided depending on the features of the yarn.
- Another object of this invention is to provide such device in such a way that it can be easily and quickly adjusted.
- A further object of this invention is to provide such device in such a way that it can be manufactured cheaply and easily, as well as by means of known processes and equipment, commonly employed in this field.
- The above mentioned objects and advantages, which will better appear below, are achieved by the braking device having the features recited in claim 1, while the dependent claims state other advantageous features.
- The invention will now be described in more detail with reference to a preferred, non-exclusive embodiment, shown by way of non limiting example in the attached drawings, wherein:
- Fig. 1 is a side view of a weft feeder provided with a braking device according to this invention;
- Fig. 2 is a perspective view of the braking device of Fig. 1 during performing, configured for forceful braking actions;
- Fig. 3 is an enlarged side view of the braking device of Fig. 1, configured as in Fig. 2;
- Fig. 4 is a perspective view of the braking device of Fig. 1 during performing, configured for softer braking actions;
- Fig. 5 is an enlarged side view of the braking device of Fig. 1, configured as in Fig. 4.
- With reference to Fig. 1, a
generic weft feeder 10 comprises amotor housing 12 to which a stationary cylinder 14 is attached. A swivel arm 15, which is operated by a motor housed inmotor housing 12, winds a plurality of yarn loops F on cylinder 14, thereby forming a weft reserve. - A
braking device 20, shown in more detail in Figs. 2-5, is supported at theend 22 of astationary arm 16 projecting frommotor housing 12 parallelly to the axis of cylinder 14. In order to fasten the breaking device toarm 16, theend 22 of the latter is radially bent towards the axis of cylinder 14, and supports ahollow stud 24 on which amain housing 26 ofdevice 20 is clamped. To this purpose,main housing 26 has acylindrical cavity 28, whose diameter matches withstud 24, providing a seat for the stud. The wall ofcylindrical cavity 28 has alongitudinal opening 30, andbraking device 20 is secured onstud 24 by a fastening screw, which is inserted in atangential hole 82 made on an edge of opening 30 and engages a corresponding threaded hole made on the opposite edge. -
Braking device 20 comprises a triad of coaxial yarn-guide eyelets U-shaped braking member 58 which is radially fastened to the drivingshaft 38 of arotary motor 40, and is arranged astride ofmiddle eyelet 34 for engaging yarn F, during braking, in its free lengths betweenmiddle eyelet 34 andend eyelets - According to this invention, a pair of threaded
bushes respective end eyelets spindle 44 which is pivotally supported, about its middle section, on abracket 48 attached tomain housing 26.Middle eyelet 34 is fastened tobracket 48. A pair ofretaining rings 60 are mounted onspindle 44 at the opposite sides ofbracket 48 for axially locking the spindle. The ends of arod 54, which is parallel tospindle 44 and integral withmiddle eyelet 34, engage respective holes made on thenecks end eyelets respective bushes Rod 54 is adapted to guide the translation, while preventing the rotation, ofend eyelets spindle 44 has agroove 50 which is engageable, for adjusting the position of the eyelets, by a screwdriver (not shown). - By operating
spindle 44, the axial distance between the eyelets can be changed, so that the deviation provided by the U-shapedbraking member 58, and consequently the entity of the braking action, will be adjusted. - It has been found in practice that the invention solves the stated object, by providing a weft-yarn breaking device which can be configured for forceful or soft braking actions, depending on the kind of yarn. Moreover, such braking device is easy and quick to adjust, by means of a common screwdriver or another suitable tool, as it will be obvious to the person skilled in the art.
- The embodiment described herein can be modified in different ways within the scope of the present invention, and all the details can be replaced with other technically equivalent elements. For example,
spindle 44 could be provided with a knob for easier adjustment of the device. Moreover, as will be obvious to the person skilled in the art,rod 54 can be replaced with other retaining guides adapted to prevent the rotation of the end eyelets around the axis of the spindle, with respect to the main housing.Rotary motor 40 which operates brakingmember 58 could be replaced with an assembly provided with a linear motor and linkages of the kind described in the above mentioned prior patent. - In practice, the materials used, provided that they are compatible with the specific use, as well as the dimensions and the shapes may be different, depending on the requirements.
Claims (8)
- A yarn-braking device for weaving machines, comprising a main housing (26) supporting a triad of yarn-guide eyelets (32, 34, 36), through which passes a weft yarn (F), and a U-shaped braking member (58) which is fastened to motor means (40) and is arranged astride of the middle eyelet (34) for engaging the yarn (F), during braking, in its free lengths between the middle eyelet (34) and end eyelets (32, 36), thereby causing the yarn (F) to be braked by friction, characterized in that at least one of the end eyelets (32, 36) is held by an axially translatable support which is lockable at a predetermined axial position.
- The device of claim 1, characterized in that both said end eyelets (32, 36) are held by respective axially translatable supports.
- The device of claim 2, characterized in that said axially translatable supports consist of a pair of threaded bushes (42, 46) engaging the opposite counter-threaded ends of a spindle (44) which is pivotally supported on said main housing (26).
- The device of anyone of claims above, characterized in that it comprises retaining guides (54) adapted to guide the translation of the end eyelets (32, 36) about the main housing (26), while preventing their rotation.
- The device of claim 4, characterized in that said retaining guides comprise a rod (54), which is parallel to the spindle (44) and integral with the middle eyelet (34), and whose ends slidably engage respective holes made on the end eyelets (32, 36).
- The device of claim 3, characterized in that said spindle (44) is provided of engaging means on its head, which are engageable by a tool for rotating the spindle (44).
- The device of claim 6, characterized in that said engaging means consist of a groove (50) which is engageable by a screwdriver.
- The device of anyone of claims above, characterized in that said motor means are a rotary motor (40) attached to main housing (26), said braking member (58) being radially fastened to the motor shaft (38) of said rotary motor.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT2002TO000489A ITTO20020489A1 (en) | 2002-06-11 | 2002-06-11 | YARN BRAKING DEVICE FOR TEXTILE MACHINES. |
ITTO20020489 | 2002-06-11 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1371763A2 EP1371763A2 (en) | 2003-12-17 |
EP1371763A3 EP1371763A3 (en) | 2004-04-14 |
EP1371763B1 true EP1371763B1 (en) | 2006-08-16 |
Family
ID=27639150
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03010532A Expired - Lifetime EP1371763B1 (en) | 2002-06-11 | 2003-05-10 | Yarn-braking device for weaving machines |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1371763B1 (en) |
CN (1) | CN100455707C (en) |
DE (1) | DE60307544T2 (en) |
IT (1) | ITTO20020489A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102454006A (en) * | 2010-10-29 | 2012-05-16 | 吴江东益纺织有限公司 | Yarn pressing device for water-jet loom |
ITTO20111217A1 (en) | 2011-12-28 | 2013-06-29 | Lgl Electronics Spa | MILLING-PLANE DEVICE FOR FIXED DRUM YARN FEEDERS |
CN107313160A (en) * | 2017-08-22 | 2017-11-03 | 安徽华泰纺织有限公司 | It is exclusively used in the protector of air-jet loom yarn gripper |
CN107938121B (en) * | 2017-12-21 | 2023-08-29 | 吴江君和纺织电器有限公司 | Yarn clamping device, tensioner and textile equipment |
CN113174684B (en) * | 2021-04-28 | 2022-07-12 | 范德威尔(中国)纺织机械有限公司 | Weft brake and control method thereof |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE59105505D1 (en) * | 1990-09-10 | 1995-06-22 | Rueti Ag Maschf | Thread brake for weaving machines. |
BE1005173A3 (en) * | 1991-08-13 | 1993-05-11 | Picanol Nv | Thread brake. |
DE19544202B4 (en) * | 1995-11-28 | 2007-01-04 | Saurer Gmbh & Co. Kg | Method and device for adjusting a yarn tension present in a textile machine according to a rake tensioner |
IT1284077B1 (en) * | 1996-06-27 | 1998-05-08 | Roj Electrotex Nuova Srl | WIRE BRAKING DEVICE FOR TEXTILE MACHINES |
IT1303154B1 (en) * | 1998-07-17 | 2000-10-30 | Lgl Electronics Spa | MODULATED BRAKING DEVICE OF THE WEFT YARN FOR TEXTILE MACHINES. |
NL1011171C1 (en) * | 1999-01-29 | 2000-08-01 | Te Strake Bv | Weaving machine with a walk-in brake. |
DE60017667T2 (en) * | 1999-10-26 | 2005-07-07 | L.G.L. Electronics S.P.A., Gandino | Weft brake, in particular for weaving machines |
ITTO20020460A1 (en) * | 2002-05-30 | 2003-12-01 | Lgl Electronics Spa | YARN BRAKING DEVICE FOR TEXTILE MACHINES. |
-
2002
- 2002-06-11 IT IT2002TO000489A patent/ITTO20020489A1/en unknown
-
2003
- 2003-05-10 DE DE60307544T patent/DE60307544T2/en not_active Expired - Lifetime
- 2003-05-10 EP EP03010532A patent/EP1371763B1/en not_active Expired - Lifetime
- 2003-06-11 CN CNB031425879A patent/CN100455707C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP1371763A3 (en) | 2004-04-14 |
ITTO20020489A1 (en) | 2003-12-11 |
ITTO20020489A0 (en) | 2002-06-11 |
EP1371763A2 (en) | 2003-12-17 |
CN1470696A (en) | 2004-01-28 |
CN100455707C (en) | 2009-01-28 |
DE60307544D1 (en) | 2006-09-28 |
DE60307544T2 (en) | 2007-09-13 |
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