EP1825040A1 - A nose roller assembly - Google Patents

A nose roller assembly

Info

Publication number
EP1825040A1
EP1825040A1 EP05813340A EP05813340A EP1825040A1 EP 1825040 A1 EP1825040 A1 EP 1825040A1 EP 05813340 A EP05813340 A EP 05813340A EP 05813340 A EP05813340 A EP 05813340A EP 1825040 A1 EP1825040 A1 EP 1825040A1
Authority
EP
European Patent Office
Prior art keywords
roller
shaft
nose
assembly
roller assembly
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.)
Withdrawn
Application number
EP05813340A
Other languages
German (de)
French (fr)
Inventor
Cherian Iype
Lakshminaickenpalayam Ramamurthi
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.)
Super Spinning Mills Ltd
Original Assignee
Super Spinning Mills Ltd
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 Super Spinning Mills Ltd filed Critical Super Spinning Mills Ltd
Publication of EP1825040A1 publication Critical patent/EP1825040A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/70—Constructional features of drafting elements
    • D01H5/74—Rollers or roller bearings
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/70—Constructional features of drafting elements
    • D01H5/86—Aprons; Apron supports; Apron tensioning arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor

Definitions

  • the present invention relates to a nose roller assembly. More particularly, but not exclusively, the present invention relates to a nose roller assembly having a roller free to rotate about a shaft and an outer shell which covers the fixing which fixes the shaft to a support.
  • Drafting assemblies for drafting rovings, slivers or strands are known. Such assemblies comprise at least one pair of nose bars which together provide a nip point. Assemblies including such nose bars are suitable only for slow speeds and cannot be used for higher speeds. In other assemblies the nose bars are replaced by nose rollers. These can run at higher speeds but as the width of the nose roller increases its diameter must increase to avoid roller bending, limiting the width of the drafting assembly. In addition, as the width of the drafting assembly increases it becomes increasingly difficult to maintain even pressure between the top and bottom nose rollers without increasing the diameter of the rollers.
  • the present invention provides a nose roller assembly comprising an inner non-rotating shaft; at least one roller co-axial with the shaft and free to rotate about said shaft by means of at least one bearing disposed between the shaft and roller;
  • the support comprises an outer shell portion having a radius of curvature substantially equal to that of the roller and arranged such that the outer shell portion and roller present a substantially continuous surface to an apron passing over the outer -shell portion and roller.
  • the nose roller assembly according to the invention has the advantage that the outer shell and roller provide a substantially continuous surface reducing drag on the apron.
  • a plurality of such nose roller assemblies can be chained together to provide a wide roller assembly without roller bending.
  • the fixing means comprises a rod received within an aperture in the fixing support, one end of the rod abutting the shaft to prevent rotation of the shaft.
  • the rod can be threaded and can be threaded into engagement with the aperture.
  • the assembly comprises a plurality of rollers on the shaft and at least one stiffening support arranged between the roller and the adjacent roller on the shaft.
  • the stiffening support can comprise an outer shell portion having a radius of curvature substantially equal to that of the roller on either side and extending therebetween.
  • the stiffening support can comprise an aperture through which the shaft passes.
  • the nose roller assembly can comprise a plurality of rollers each roller being arranged on an individual shaft .
  • the nose roller assembly can comprise at least one fixing support arranged between one shaft and the adjacent shaft and fixedly connected to one end of the shaft and the opposite end of the adjacent shaft.
  • the nose roller assembly can comprise a fixing support between each roller and the adjacent roller.
  • a carding assembly comprising a nose roller assembly, the nose roller assembly comprising an inner non-rotating , shaft; at least one roller co-axial with the shaft and free to rotate about said shaft by means of at least one bearing disposed between the shaft and roller;
  • the fixing support comprises an outer shell portion having a radius of curvature equal to that of the roller and arranged such that the shell and roller present a substantially continuous surface to an apron passing over the shell and roller.
  • the carding assembly can comprise a plurality of such nose rollers, the nose rollers arranged to provide a nip point.
  • Figure 1 shows a known drafting assembly in cross section
  • Figure 2 shows a known nose roller in cross section
  • Figures 3 and 4 show a nose roller according to the invention in cross sectioned and perspective views.
  • FIG. 1 Shown in figure 1 is a known drafting assembly 1 in cross section.
  • the drafting assembly 1 comprises a pair of rear rollers 2,3, and a pair of front rollers 4,5.
  • Upper and lower aprons 6,7 pass around the rear rollers 2,3. Nose bars 8,9 bring the aprons 6,7 together to define a nip point 10.
  • a sliver 11 is drawn between the rear rollers 2,3 and is carried by the aprons 6, 7 the nip point 10. As it exits the nip point 10 the sliver is gripped by the front rollers 4,5.
  • the front rollers 4,5 rotate more rapidly than the rear rollers 2,3 so drafting the sliver.
  • Such an apparatus can also be used for rovings or strands.
  • FIG. 2 Shown in figure 2 is a known nose roller 12.
  • the nose roller 12 comprises a non-rotating shaft 13 fixed to a support 14.
  • a roller 15 is free to rotate about the shaft 15 by means of a bearing.
  • Assemblies including such nose rollers 12 rather than nose bars can run at higher speeds.
  • Such rollers 12 must however be relatively narrow to avoid bending.
  • the nose roller comprises an inner non-rotating shaft 16. Surrounding and co-axial with the shaft 16 is a roller 17. The roller 17 is free to rotate about the shaft 16 by means of a bearing 18.
  • a portion 19 of the shaft 16 extends beyond the roller 17. Abutting this portion 19 is a fixing means 20 comprising a threaded rod 20.
  • the threaded rod 20 is threaded into engagement with a fixing support 21.
  • the threaded rod 20 abuts the shaft 16 preventing its rotation.
  • a further fixing means (not shown) fixes the opposite end of the shaft 16 in place.
  • the nose roller assembly comprises a second inner non- rotating shaft 22 and a second roller 23 which rotates about the second inner shaft 22.
  • the opposite ends of the first and second inner shafts 16,22 abut together.
  • the same fixing means 20 abuts both shafts 16,22 preventing their rotation.
  • a further fixing means (not shown) holds the opposite end of the shaft in place.
  • a portion of the fixing support 21 comprises an outer shell portion 24.
  • the outer face 25 of this portion 24 has the same radius of curvature as the rollers 17,23 and extends between them.
  • the outer shell portion 24 is arranged such that the rollers 17,23 and outer shell portion 24 provide a substantially continuous surface.
  • the shell portion 24 is a relatively small portion of the total length of the nose roller and as such offers relatively little frictional resistance to the apron as it passes over the nose roller assembly.
  • the fixing support is in turn held in a rigid body.
  • FIG 4 shows a portion of a further embodiment of the invention in perspective view.
  • the nose roller assembly of this embodiment comprises a plurality of rollers, only three of which are shown. Each roller is on a different shaft.
  • a fixing support is disposed between each of the shafts. A fixing means within the support abuts against the ends of the adjacent shafts preventing their rotation.
  • the fixing supports each have an outer shell portion. The outer shell portion has substantially the same radius of curvature as the adjacent rollers and extends therebetween.
  • the fixing supports are in turn held in a longer rigid body. In a further embodiment of the invention (not shown) the supports are an integral portion of the longer rigid body.
  • a plurality of rollers are disposed on each shaft.
  • the shaft is fixed to a support at each end.
  • a stiffening support Disposed between each of the rollers is a stiffening support.
  • Each stiffening support has an aperture through which the shaft passes.
  • Each of the stiffening supports comprises further outer shell portions having a radius of curvature substantially equal to the rollers. The further outer shell portions extend between adjacent rollers so producing a substantially continuous surface.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Abstract

A nose roller assembly comprising an inner non-rotating shaft (16, 22); at least one roller (17, 23) co-axial with the shaft(16, 22) and free to rotate about said shaft by means of at least one bearing (18) disposed between the shaft (16, 22) and roller (17, 23); at least one portion of the shaft (19) extending beyond the roller (17, 23) and being fixedly connected to a fixing support (21) a fixing means; characterised in that the fixing support (21) comprises an outer shell portion (24) having a radius of curvature substantially equal to that of the roller (17, 23) and arranged such that the outer shell portion (24) and roller (17, 23) present a substantially continuous surface to an apron passing over the outer shell portion (24) and roller(17, 23).

Description

A NOSE ROLLER ASSEMBLY
The present invention relates to a nose roller assembly. More particularly, but not exclusively, the present invention relates to a nose roller assembly having a roller free to rotate about a shaft and an outer shell which covers the fixing which fixes the shaft to a support.
Drafting assemblies for drafting rovings, slivers or strands are known. Such assemblies comprise at least one pair of nose bars which together provide a nip point. Assemblies including such nose bars are suitable only for slow speeds and cannot be used for higher speeds. In other assemblies the nose bars are replaced by nose rollers. These can run at higher speeds but as the width of the nose roller increases its diameter must increase to avoid roller bending, limiting the width of the drafting assembly. In addition, as the width of the drafting assembly increases it becomes increasingly difficult to maintain even pressure between the top and bottom nose rollers without increasing the diameter of the rollers.
Accordingly in a first aspect the present invention provides a nose roller assembly comprising an inner non-rotating shaft; at least one roller co-axial with the shaft and free to rotate about said shaft by means of at least one bearing disposed between the shaft and roller;
a portion of the shaft extending beyond the roller and being fixedly connected to a fixing support by a fixing means;
characterised in that the support comprises an outer shell portion having a radius of curvature substantially equal to that of the roller and arranged such that the outer shell portion and roller present a substantially continuous surface to an apron passing over the outer -shell portion and roller.
The nose roller assembly according to the invention has the advantage that the outer shell and roller provide a substantially continuous surface reducing drag on the apron. A plurality of such nose roller assemblies can be chained together to provide a wide roller assembly without roller bending.
Preferably the fixing means comprises a rod received within an aperture in the fixing support, one end of the rod abutting the shaft to prevent rotation of the shaft.
The rod can be threaded and can be threaded into engagement with the aperture.
Preferably the assembly comprises a plurality of rollers on the shaft and at least one stiffening support arranged between the roller and the adjacent roller on the shaft.
The stiffening support can comprise an outer shell portion having a radius of curvature substantially equal to that of the roller on either side and extending therebetween.
The stiffening support can comprise an aperture through which the shaft passes.
Alternatively, the nose roller assembly can comprise a plurality of rollers each roller being arranged on an individual shaft . The nose roller assembly can comprise at least one fixing support arranged between one shaft and the adjacent shaft and fixedly connected to one end of the shaft and the opposite end of the adjacent shaft.
The nose roller assembly can comprise a fixing support between each roller and the adjacent roller.
In a further aspect of the invention there is provided a carding assembly comprising a nose roller assembly, the nose roller assembly comprising an inner non-rotating, shaft; at least one roller co-axial with the shaft and free to rotate about said shaft by means of at least one bearing disposed between the shaft and roller;
a portion of the shaft extending beyond the roller and being fixedly connected to a fixing support by a fixing means;
characterised in that the fixing support comprises an outer shell portion having a radius of curvature equal to that of the roller and arranged such that the shell and roller present a substantially continuous surface to an apron passing over the shell and roller.
The carding assembly can comprise a plurality of such nose rollers, the nose rollers arranged to provide a nip point.
The present invention will now be described by way of example only, and not in any limitative sense with reference to the accompanying drawings in which
Figure 1 shows a known drafting assembly in cross section; Figure 2 shows a known nose roller in cross section;
Figures 3 and 4 show a nose roller according to the invention in cross sectioned and perspective views.
Shown in figure 1 is a known drafting assembly 1 in cross section. The drafting assembly 1 comprises a pair of rear rollers 2,3, and a pair of front rollers 4,5. Upper and lower aprons 6,7 pass around the rear rollers 2,3. Nose bars 8,9 bring the aprons 6,7 together to define a nip point 10. In use a sliver 11 is drawn between the rear rollers 2,3 and is carried by the aprons 6, 7 the nip point 10. As it exits the nip point 10 the sliver is gripped by the front rollers 4,5. The front rollers 4,5 rotate more rapidly than the rear rollers 2,3 so drafting the sliver. Such an apparatus can also be used for rovings or strands.
Assemblies using such nose bars are only suitable for low speeds. Shown in figure 2 is a known nose roller 12. The nose roller 12 comprises a non-rotating shaft 13 fixed to a support 14. A roller 15 is free to rotate about the shaft 15 by means of a bearing. Assemblies including such nose rollers 12 rather than nose bars can run at higher speeds. Such rollers 12 must however be relatively narrow to avoid bending.
Shown in figure 3 is a nose roller according to the present invention. The nose roller comprises an inner non-rotating shaft 16. Surrounding and co-axial with the shaft 16 is a roller 17. The roller 17 is free to rotate about the shaft 16 by means of a bearing 18.
A portion 19 of the shaft 16 extends beyond the roller 17. Abutting this portion 19 is a fixing means 20 comprising a threaded rod 20. The threaded rod 20 is threaded into engagement with a fixing support 21. The threaded rod 20 abuts the shaft 16 preventing its rotation. A further fixing means (not shown) fixes the opposite end of the shaft 16 in place.
The nose roller assembly comprises a second inner non- rotating shaft 22 and a second roller 23 which rotates about the second inner shaft 22. The opposite ends of the first and second inner shafts 16,22 abut together. The same fixing means 20 abuts both shafts 16,22 preventing their rotation. A further fixing means (not shown) holds the opposite end of the shaft in place.
A portion of the fixing support 21 comprises an outer shell portion 24. The outer face 25 of this portion 24 has the same radius of curvature as the rollers 17,23 and extends between them. The outer shell portion 24 is arranged such that the rollers 17,23 and outer shell portion 24 provide a substantially continuous surface. The shell portion 24 is a relatively small portion of the total length of the nose roller and as such offers relatively little frictional resistance to the apron as it passes over the nose roller assembly. The fixing support is in turn held in a rigid body.
Figure 4 shows a portion of a further embodiment of the invention in perspective view. The nose roller assembly of this embodiment comprises a plurality of rollers, only three of which are shown. Each roller is on a different shaft. A fixing support is disposed between each of the shafts. A fixing means within the support abuts against the ends of the adjacent shafts preventing their rotation. The fixing supports each have an outer shell portion. The outer shell portion has substantially the same radius of curvature as the adjacent rollers and extends therebetween. The fixing supports are in turn held in a longer rigid body. In a further embodiment of the invention (not shown) the supports are an integral portion of the longer rigid body.
In a further embodiment of the invention (not shown) a plurality of rollers are disposed on each shaft. The shaft is fixed to a support at each end. Disposed between each of the rollers is a stiffening support. Each stiffening support has an aperture through which the shaft passes. Each of the stiffening supports comprises further outer shell portions having a radius of curvature substantially equal to the rollers. The further outer shell portions extend between adjacent rollers so producing a substantially continuous surface.

Claims

1. A nose roller assembly comprising an inner non-rotating shaft; at least one roller co-axial with the shaft and free to rotate about said shaft by means of at least one bearing disposed between the shaft and roller;
a portion of the shaft extending beyond the roller and being fixedly connected to a fixing support by a fixing means;
characterised in that the fixing support comprises an outer shell portion having a radius of curvature substantially equal to that of the roller and arranged such that the outer shell portion and roller present a substantially continuous surface to an apron passing over the outer shell portion and roller.
2. A nose roller assembly as claimed in claim 1 wherein the fixing means comprises a rod received within an aperture in the fixing support, one end of the rod abutting the shaft to prevent rotation of the shaft.
3. A nose roller assembly as claimed in claim 2, wherein the rod is threaded and is threaded into engagement with the aperture.
4. A nose roller assembly as claimed in any one of claims 1 to 3, comprising a plurality of rollers on the shaft and at least one stiffening support arranged between a roller and the adjacent roller on the shaft.
5. A nose roller assembly as claimed in claim 4, comprising a stiffening support between each roller and the adjacent roller on the shaft.
6. A nose roller assembly as claimed in either of claims 4 or 5, wherein the stiffening support comprises an outer shell portion having a radius of curvature substantially equal to that of the roller on either side and extending therebetween.
7. A nose roller assembly as claimed in any of claim 4 to 6 wherein the stiffening support comprises an aperture through which the shaft passes.
8. A nose roller assembly as claimed in any one of claims 1 to 3 , comprising a plurality of rollers each roller being arranged on an individual shaft .
9. A nose roller assembly as claimed in claim 8 comprising at least one fixing support arranged between one shaft and the adjacent shaft and fixedly connected to one end of the shaft and the opposite end of the adjacent shaft.
10. A nose roller assembly as claimed in claim 9 comprising a fixing support between each roller and the adjacent roller.
11. A carding assembly comprising a nose roller as claimed in any one of claims 1 to 10.
12. A carding assembly as claimed in claim 9, comprising a pair of nose rollers as claimed in any one of claims 1 to 10, the nose rollers arranged to provide a nip point.
13. A nose roller assembly substantially as hereinbefore described.
14 . A nose roller assembly substantially as hereinbefore described with reference to the drawings .
EP05813340A 2004-12-14 2005-11-16 A nose roller assembly Withdrawn EP1825040A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0427284A GB2421295B (en) 2004-12-14 2004-12-14 A sectioned nose roller assembly
PCT/GB2005/004426 WO2006064177A1 (en) 2004-12-14 2005-11-16 A nose roller assembly

Publications (1)

Publication Number Publication Date
EP1825040A1 true EP1825040A1 (en) 2007-08-29

Family

ID=34073643

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05813340A Withdrawn EP1825040A1 (en) 2004-12-14 2005-11-16 A nose roller assembly

Country Status (4)

Country Link
EP (1) EP1825040A1 (en)
CN (1) CN101072904B (en)
GB (1) GB2421295B (en)
WO (1) WO2006064177A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017089058A (en) * 2015-11-11 2017-05-25 村田機械株式会社 Tensor bar, draft machine and spinning machine

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2853743A (en) * 1955-01-24 1958-09-30 Russell Mfg Company Inc Top roll unit for fiber attenuating apparatus
GB1184787A (en) * 1960-11-20 1970-03-18 Mackie & Sons Ltd J Improvements relating to Textile Drafting Apparatus
GB1184784A (en) * 1966-03-07 1970-03-18 Nailsea Engineering Company Lt Cleaning Particulate Filters
DE2004483A1 (en) * 1970-01-31 1971-09-30
US4901517A (en) * 1989-07-17 1990-02-20 Monsanto Company Apparatus for the drafting section of ring spinning frames
CN2152810Y (en) * 1993-01-09 1994-01-12 无锡县西漳纺织机件厂 Double-short apron drafting assembly for spinning machine
JP3438584B2 (en) * 1998-05-08 2003-08-18 株式会社豊田自動織機 Top apron cradle in spinning machine
DE10311827A1 (en) * 2003-03-13 2004-09-23 Wilhelm Stahlecker Gmbh Twin-belt sliver drawing unit, for a spinner, has a deflection projection extending into the spinning zone without contact with the lower belt deflection roller
DE10321893A1 (en) * 2003-05-07 2004-12-02 Spindelfabrik Süssen Schurr, Stahlecker & Grill GmbH Upper belt cage for spinning assembly has a main shell with an interchangeable belt reverse-guide attached to the shell
SE526914C2 (en) * 2003-12-02 2005-11-15 Skf Ab A segmented roller for an extruder

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006064177A1 *

Also Published As

Publication number Publication date
CN101072904A (en) 2007-11-14
GB0427284D0 (en) 2005-01-12
CN101072904B (en) 2010-05-05
WO2006064177A1 (en) 2006-06-22
GB2421295A (en) 2006-06-21
GB2421295B (en) 2009-11-25

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