EP0927781A1 - Rollers for guiding elastic filaments in spinning machines - Google Patents
Rollers for guiding elastic filaments in spinning machines Download PDFInfo
- Publication number
- EP0927781A1 EP0927781A1 EP97500181A EP97500181A EP0927781A1 EP 0927781 A1 EP0927781 A1 EP 0927781A1 EP 97500181 A EP97500181 A EP 97500181A EP 97500181 A EP97500181 A EP 97500181A EP 0927781 A1 EP0927781 A1 EP 0927781A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rollers
- roller
- yarn
- elastic filaments
- spinning machines
- 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
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/04—Guides for slivers, rovings, or yarns; Smoothing dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H57/00—Guides for filamentary materials; Supports therefor
- B65H57/14—Pulleys, rollers, or rotary bars
-
- 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 the technology of spinning with elastic filaments and, in particular, to rollers for guiding elastic filaments towards the delivery cylinders of a spinning machine.
- the present invention is intended to solve the above-mentioned problem, achieving good guiding of the yarns on the rollers with self-centering characteristics, that is to say that, if the yarn is deflected to a certain extent owing to inadvertent mechanical action thereon, the roller has means for the self-centering of the yarn, leading it back to the guide groove.
- the present invention provides for the formation of a guide roller in which the yarn-guide groove is connected by its edges, on one side, by means of a respective conical region, to the radially-projecting region or ridge carrying the O-ring for friction against the rollers of the drafting train and, on the other side, to a respective conical region extending along the entire useful length of the roller.
- the roller characteristics mentioned are complemented by the elimination of steps or regions of any kind in which the yarn may become caught.
- the present invention provides for the ridge for contact with the rollers of the drafting train to be formed integrally with the roller itself, that is, with the omission of the O-ring of elastomeric material which is normally used for contact with the drafting train, considerably increasing the efficiency of the roller in the sense of preventing deflection of the yarn.
- the present invention provides for the formation of rollers for guiding elastic filaments during the spinning operation, the rollers having characteristics for self-centering the yarn and preferably comprising a unitary body 1 provided with a central mounting hole 2 and having a yarn-guide groove 3 defined by sides 5 and 6 which define the base 7 which is to receive the yarn.
- the groove is extended at the edges of its sides by respective conical regions having different tapers and indicated 8 and 9, the said cones converging towards the groove 7 which is the region corresponding to the narrowest portions of both cones.
- the conical region 9 extends practically for the entire length between the groove 3 and an end edge 10 of the roller, whereas the conical region 8 extends as far as the ridge 4 which is intended to establish contact with the corresponding roller of the drafting train which is indicated 11 in Figure 2.
- the ridge or radially projecting region 4 has at least one lateral face 24 which is inclined towards the groove 3 and a cylindrical outer region 25 concentric with the axis of symmetry of the roller.
- the other face 26 which delimits the projecting region 4 may also have a certain inclination towards the end of the roller.
- the roller in accordance with the present invention may be formed as shown in Figures 4 to 8 in which the roller 17 has conical regions 18 and 19 adjacent the guide groove 20 and the ridge for contact with the rollers of the drafting train is formed by an elastomer O-ring 21.
- the roller apart from the conical surface 18 linking the edge of the groove and the seat of the O-ring 21, the roller will have a second outer inclined plane 22 Joining the front face 23 to the seat of the O-ring 21.
- the planes 18 and 22 it is advisable for the planes 18 and 22 to be inclined at a small angle to the surface of the O-ring 21 to avoid regions in which the yarns may be caught.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
- Guides For Winding Or Rewinding, Or Guides For Filamentary Materials (AREA)
Abstract
Description
- The present invention relates to the technology of spinning with elastic filaments and, in particular, to rollers for guiding elastic filaments towards the delivery cylinders of a spinning machine.
- At the moment, various devices are known for guiding elastic filaments in spinning machines and the Applicant's own Spanish utility model 9201019, which discloses a head for carrying elastic-yarn guide-rollers having resilient O-rings fitted on their peripheries for establishing contact with the rollers of the drawing train, may be cited in particular.
- In the devices mentioned, and in other currently-known devices, there are various problems, particularly in guiding extremely fine yarns which may reach 22 decitex (that is to say, 10,000 metres of filament have a weight of 22 grammes). There are certain problems in spinning with the very fine yarns mentioned, owing to the ease with which the yarns can be displaced and come out of the guide. In fact, in currently-known rollers, when the operators handle the various elements of the machine, for example, to take out empty roving bobbins, to put in place full roving bobbins, etc., they may in many cases inadvertently touch the filament, removing it from the guide, so that the filament may be caught in an incorrect position, giving rise to a faulty yarn which will have to be discarded or which, if a fabric is to be manufactured on the basis thereof, may cause the manufactured fabric to be rejected with consequent economic losses.
- The present invention is intended to solve the above-mentioned problem, achieving good guiding of the yarns on the rollers with self-centering characteristics, that is to say that, if the yarn is deflected to a certain extent owing to inadvertent mechanical action thereon, the roller has means for the self-centering of the yarn, leading it back to the guide groove.
- To achieve its objects, the present invention provides for the formation of a guide roller in which the yarn-guide groove is connected by its edges, on one side, by means of a respective conical region, to the radially-projecting region or ridge carrying the O-ring for friction against the rollers of the drafting train and, on the other side, to a respective conical region extending along the entire useful length of the roller. If the yarn undergoes a certain displacement towards one side or the other, the respective conical regions, which converge towards the edges of the groove, thus lead the yarn back towards the latter, since the very tension of the yarn, acting transverse the axis of the roller, creates a force component which is directed in the direction of the taper and which will displace the deflected yarn back towards the guide groove.
- The roller characteristics mentioned are complemented by the elimination of steps or regions of any kind in which the yarn may become caught. In this respect, the present invention provides for the ridge for contact with the rollers of the drafting train to be formed integrally with the roller itself, that is, with the omission of the O-ring of elastomeric material which is normally used for contact with the drafting train, considerably increasing the efficiency of the roller in the sense of preventing deflection of the yarn.
- For a better understanding, some drawings illustrating a preferred embodiment of the present invention are appended by way of non-limiting example.
- Figure 1 shows schematically a longitudinal section through a roller formed in accordance with the present invention, showing schematically the self-centering effect.
- Figure 2 is an elevational view of a roller according to the present invention in its position of contact with a roller of the drafting train.
- Figure 3 is a partially-sectioned elevational view of an assembly of two rollers mounted on the same shaft and working in combination with the drafting train.
- Figures 4, 5 and 6 are sections taken in the planes indicated through a roller formed in accordance with the present invention.
- Figures 7 and 8 are side and front elevational views of the roller, respectively.
-
- As shown in the drawings, the present invention provides for the formation of rollers for guiding elastic filaments during the spinning operation, the rollers having characteristics for self-centering the yarn and preferably comprising a
unitary body 1 provided with a central mounting hole 2 and having a yarn-guide groove 3 defined bysides 5 and 6 which define thebase 7 which is to receive the yarn. In accordance with the present invention, the groove is extended at the edges of its sides by respective conical regions having different tapers and indicated 8 and 9, the said cones converging towards thegroove 7 which is the region corresponding to the narrowest portions of both cones. Theconical region 9 extends practically for the entire length between the groove 3 and anend edge 10 of the roller, whereas the conical region 8 extends as far as the ridge 4 which is intended to establish contact with the corresponding roller of the drafting train which is indicated 11 in Figure 2. The ridge or radially projecting region 4 has at least onelateral face 24 which is inclined towards the groove 3 and a cylindricalouter region 25 concentric with the axis of symmetry of the roller. Theother face 26 which delimits the projecting region 4 may also have a certain inclination towards the end of the roller. - This arrangement eliminates intermediate steps or regions of any kind in which the yarn may be caught. In fact, as shown in Figure 1, if a yarn 12 is deflected sideways from the
base 7 of the groove by a transverse force, the very tension of the yarn produces a force F1 which, when it acts on the inclined surface 8, is resolved into a force F2 perpendicular to the said surface and a force F3 acting parallel to the surface itself and in a direction such as to compel the yarn 12 to go back to thebase 7 of the groove in a self-centering action which prevents the yarn from coming out. - Thus, as shown in Figure 2, to whatever position the yarn may be deflected sideways, for example, the positions indicated by the
broken lines vectors - In a variant, the roller in accordance with the present invention may be formed as shown in Figures 4 to 8 in which the
roller 17 hasconical regions guide groove 20 and the ridge for contact with the rollers of the drafting train is formed by an elastomer O-ring 21. In this version, apart from theconical surface 18 linking the edge of the groove and the seat of the O-ring 21, the roller will have a second outerinclined plane 22 Joining thefront face 23 to the seat of the O-ring 21. In any case, it is advisable for theplanes ring 21 to avoid regions in which the yarns may be caught.
Claims (5)
- Rollers for guiding elastic filaments in spinning machines, of the type comprising a unitary body which can be fitted on a carrying shaft and which has a peripheral yarn-guide groove as well as a radially-projecting lateral region for establishing tangential contact with the rollers of the drafting train, characterized by respective conical regions extending from the edges of the yarn-guide groove, and inclined so as to converge towards the groove, one of these conical surfaces extending as far as an end edge of the roller and the other being connected to the base of the radially-projecting region for establishing contact with the rollers of the drafting train.
- Rollers for guiding elastic filaments in spinning machines according to Claim 1, characterized in that the radially-projecting region for contact with the rollers of the drafting train forms a single piece with the roller itself and at least one of its lateral faces is inclined towards the yarn-guide groove.
- Rollers for guiding elastic filaments in spinning machines according to Claim 2, characterized in that the radially-projecting region for establishing contact with a roller of the drafting train has an externally cylindrical shape concentric with the axis of symmetry of the roller.
- Rollers for guiding elastic filaments in spinning machines according to Claim 1, characterized in that the radially-projecting region for contact with the rollers of the drafting train has a contact O-ring delimited by respective faces, of which one is inclined towards the yarn-guide groove and the other is inclined towards the corresponding end of the roller.
- Rollers for guiding elastic filaments in spinning machines according to Claim 4, characterized in that the lateral faces delimiting the region in which the O-ring is fitted are inclined at small angle to the outer surface of the latter.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19970500181 EP0927781B1 (en) | 1997-10-30 | 1997-10-30 | Rollers for guiding elastic filaments in spinning machines |
DE1997605230 DE69705230T2 (en) | 1997-10-30 | 1997-10-30 | Rolls for guiding elastic threads in spinning machines |
ES97500181T ES2159383T3 (en) | 1997-10-30 | 1997-10-30 | ROLLERS FOR THE GUIDANCE OF ELASTIC FILAMENTS IN SPINNING MACHINES. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19970500181 EP0927781B1 (en) | 1997-10-30 | 1997-10-30 | Rollers for guiding elastic filaments in spinning machines |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0927781A1 true EP0927781A1 (en) | 1999-07-07 |
EP0927781B1 EP0927781B1 (en) | 2001-06-13 |
Family
ID=8230098
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19970500181 Expired - Lifetime EP0927781B1 (en) | 1997-10-30 | 1997-10-30 | Rollers for guiding elastic filaments in spinning machines |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0927781B1 (en) |
DE (1) | DE69705230T2 (en) |
ES (1) | ES2159383T3 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2261093A1 (en) * | 2005-08-05 | 2006-11-01 | Pinter, S.A. | Guide device for core yarns applied in corespun yarns |
CN111424345A (en) * | 2020-03-31 | 2020-07-17 | 成都翔宇致远文化传播有限公司 | Spinning method of point-crossing positioning and threading textile machinery |
CN113245472A (en) * | 2021-04-25 | 2021-08-13 | 嘉兴东方钢帘线有限公司 | Device with twisting, bending and straightening functions |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE9113140U1 (en) * | 1991-10-22 | 1991-12-12 | SIPRA Patententwicklungs- und Beteiligungsgesellschaft mbH, 7470 Albstadt | Device for guiding a thread or the like. |
EP0628508A1 (en) * | 1993-06-07 | 1994-12-14 | Murase, Teiichi | A yarning machine |
-
1997
- 1997-10-30 DE DE1997605230 patent/DE69705230T2/en not_active Expired - Lifetime
- 1997-10-30 ES ES97500181T patent/ES2159383T3/en not_active Expired - Lifetime
- 1997-10-30 EP EP19970500181 patent/EP0927781B1/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE9113140U1 (en) * | 1991-10-22 | 1991-12-12 | SIPRA Patententwicklungs- und Beteiligungsgesellschaft mbH, 7470 Albstadt | Device for guiding a thread or the like. |
EP0628508A1 (en) * | 1993-06-07 | 1994-12-14 | Murase, Teiichi | A yarning machine |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2261093A1 (en) * | 2005-08-05 | 2006-11-01 | Pinter, S.A. | Guide device for core yarns applied in corespun yarns |
EP1749909A3 (en) * | 2005-08-05 | 2009-12-30 | Pinter, S.A. | Guide device for core yarns applied in corespun yarns |
CN111424345A (en) * | 2020-03-31 | 2020-07-17 | 成都翔宇致远文化传播有限公司 | Spinning method of point-crossing positioning and threading textile machinery |
CN111424345B (en) * | 2020-03-31 | 2021-08-31 | 江苏新诚誉纺织科技有限公司 | Spinning method of point-crossing positioning and threading textile machinery |
CN113245472A (en) * | 2021-04-25 | 2021-08-13 | 嘉兴东方钢帘线有限公司 | Device with twisting, bending and straightening functions |
Also Published As
Publication number | Publication date |
---|---|
DE69705230T2 (en) | 2002-04-25 |
EP0927781B1 (en) | 2001-06-13 |
DE69705230D1 (en) | 2001-07-19 |
ES2159383T3 (en) | 2001-10-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6073314A (en) | Device for condensing a drafted fiber strand | |
EP0927781B1 (en) | Rollers for guiding elastic filaments in spinning machines | |
US2492778A (en) | Yarn twisting apparatus and method | |
US3491526A (en) | Yarn severing arrangement for textile spindles | |
US5996181A (en) | Apparatus for bundling a drafted roving | |
JPS5848662B2 (en) | tufting needle | |
US4682634A (en) | Lifting beam for shed forming device in a weaving loom | |
US6082089A (en) | Arrangement for condensing a drafted fiber strand | |
GB2169927A (en) | A thread delivery device for textile machinery | |
US3327466A (en) | Center-of-gravity spindle device | |
JPS6328939A (en) | Circular loom | |
US2536618A (en) | Spindle for use in textile machines | |
FR2466541A1 (en) | Jacquard double-roller unit - has plug-socket side walls to clip together and hold the deflection rollers | |
US6568042B2 (en) | Unit for condensing a bundle of textile fibres drafted in a spinning machine | |
CN101503837A (en) | Guide apron for double apron-drafting system and double apron-drafting system | |
US4538328A (en) | Device for interrupting feed of a roving to a drawing frame | |
US5016323A (en) | High-draft drafting device for a flyerless spinning process | |
US5513503A (en) | Strand guiding device for circular knitting machines | |
US5806570A (en) | Weft band guide pin arrangement in a gripper weaving machine | |
KR101403802B1 (en) | Method for selecting deflection rail of a roller drafting apparatus for spinning machine | |
EP1749908A2 (en) | Tensioner for condensing bags | |
US3782660A (en) | Textile spindle | |
US3374757A (en) | Shuttle race cleaner | |
CN220617942U (en) | Yarn feeding device | |
US6568040B2 (en) | Unit for condensing a bundle of textile fibres drafted in a spinning machine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19980721 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE ES IT |
|
AKX | Designation fees paid |
Free format text: DE ES IT |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
17Q | First examination report despatched |
Effective date: 20001017 |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE ES IT |
|
REF | Corresponds to: |
Ref document number: 69705230 Country of ref document: DE Date of ref document: 20010719 |
|
ITF | It: translation for a ep patent filed |
Owner name: SOCIETA' ITALIANA BREVETTI S.P.A. |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2159383 Country of ref document: ES Kind code of ref document: T3 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IT Payment date: 20090527 Year of fee payment: 13 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20090810 Year of fee payment: 13 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20090615 Year of fee payment: 13 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 69705230 Country of ref document: DE Effective date: 20110502 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20111118 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20101030 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20101031 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20110502 |