US20220396900A1 - Top apron cradle for an apron drafting system of a textile machine - Google Patents

Top apron cradle for an apron drafting system of a textile machine Download PDF

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Publication number
US20220396900A1
US20220396900A1 US17/835,255 US202217835255A US2022396900A1 US 20220396900 A1 US20220396900 A1 US 20220396900A1 US 202217835255 A US202217835255 A US 202217835255A US 2022396900 A1 US2022396900 A1 US 2022396900A1
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US
United States
Prior art keywords
apron
receptacle
tensioning element
section
top apron
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.)
Pending
Application number
US17/835,255
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English (en)
Inventor
Chandrassekaran Seshayer
Karoline Guenther
Sarah MEISSNER
Peter EGGERS
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.)
Saurer Spinning Solutions GmbH and Co KG
Original Assignee
Saurer Spinning Solutions GmbH and Co KG
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 Saurer Spinning Solutions GmbH and Co KG filed Critical Saurer Spinning Solutions GmbH and Co KG
Assigned to SAURER SPINNING SOLUTIONS GMBH & CO. KG reassignment SAURER SPINNING SOLUTIONS GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: EGGERS, PETER, GUENTHER, KAROLINE, MEISSNER, Sarah, Seshayer, Chandrassekaran
Publication of US20220396900A1 publication Critical patent/US20220396900A1/en
Pending legal-status Critical Current

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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
    • D01H5/86—Aprons; Apron supports; Apron tensioning arrangements
    • 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
    • D01H5/88—Cradles; Tensors

Definitions

  • the present invention relates to a top apron cradle for an apron drafting system of a textile machine, in particular a pre-spinning machine such as a roving frame and a spinning machine such as a ring spinning machine or air-spinning machine, with an apron guide unit for circumferentially guiding a top apron wrapped around a top roller of the apron drafting system, with an apron guide section for guiding the top apron, in which case the apron guide section has an entrance section for receiving and guiding the top apron, and a deflection section spaced apart from the entrance section for deflecting the guided top apron, and a top roller bearing unit for bearing the top apron cradle and for positioning the apron guide unit downstream of the top roller in the circumferential direction of the top apron.
  • a pre-spinning machine such as a roving frame and a spinning machine such as a
  • the drafting systems In order to draft the fibre band, the drafting systems generally have a plurality of roller pairs arranged one after the other, which roller pairs, arranged lying on each other, transport the fibre band running clamped between them.
  • a roller pair usually consists of a bottom roller and a top pressure roller adjacent to the bottom roller, one of which is driven and the other is set in rotation via the pressure contact.
  • a draft of the fibre band is achieved in that the circumferential velocity increases from roller pair to roller pair in the transport direction of the fibre band defined by the direction of rotation of the roller pairs, with the different circumferential velocities of the roller pairs immediately following one another in the transport direction determining the drafting ratio.
  • the bottom rollers are each arranged on a carrying device, in particular a drafting system carriage, are arranged one behind the other in the transport direction of the fibre band and form a drafting system bottom section of a drafting system. Since the fibres of the fibre band lose their cohesion in the main drafting zone where the fibre band is drafted with high drafting values, drafting systems configured as apron drafting systems have already been disclosed, in which the fibre band is guided by aprons between the nip lines of the roller pairs immediately succeeding one another.
  • Apron drafting systems are particularly widespread in this context, in which one apron each is guided around a top and bottom roller in the area of the main drafting zone and is deflected by an apron guide unit towards the output roller pair into the return direction, so that the fibre band can be guided between the top and bottom apron.
  • the aprons which are configured as an endless belt are guided further around a tensioning apparatus which keeps the aprons at the pretension required for operation.
  • Tensioning devices of prior art are usually aligned axially to the running direction and thus influence the depth of the guided apron in the running direction, which hinders precise distance adjustments. If devices for adjusting the tension of the apron are not used, this will require a very small tolerance of the apron length to ensure proper operation.
  • the problem addressed by the present invention is one of providing a top apron cradle for an apron drafting system as well as an apron drafting system having such a top apron cradle, in which tolerances in the apron length can be compensated quickly and variably in a simple manner.
  • the present invention solves the problem by a top apron cradle for an apron drafting system of a textile machine with an apron guide unit for circumferentially guiding a top apron looped around a top roller of the apron drafting system, with an apron guide section for guiding the top apron, the apron guide section having an entrance section for receiving the top apron and a deflection section spaced apart from the entrance section for deflecting the guided top apron, and a top roller bearing unit for bearing the top apron cradle and positioning the apron guide unit downstream of the top roller in the circumferential direction of the top apron.
  • the apron guide unit has a receptacle, which is assigned to the entrance section, for a replaceable tensioning element which can be brought into pressure contact with an inner side of the top apron, and the tensioning element, in which case the receptacle and the tensioning element replaceably accommodated in the receptacle for guiding the top apron via the tensioning element and the deflection section are formed at a distance from the area of the apron guide section enclosed by the tensioning element and the deflection section.
  • the present invention solves the problem by an apron drafting system having a drivable first roller pair and a drivable second roller pair for drafting a fibre band, the first and second roller pairs being arranged at a distance from one another in the fibre band transport direction between a top and bottom roller of each roller pair for clamping transport of the fibre band, the first and second roller pairs being drivable at different rotational speeds in the operating condition of the apron drafting system to form a drafting zone located between the clamping lines of the first and second roller pairs, a top apron cradle, which is arranged between the first and second roller pairs and, in the drafting zone, circumferentially guides a top apron having a top roller of the first roller pair looped around it circumferentially along the fibre band transport direction, characterised in that the top apron cradle is a top apron cradle having the above described features.
  • the apron guide unit has a receptacle associated with the entrance section for a replaceable tensioning element that can be brought into pressure contact with an inner side of the top apron, as well as the tensioning element.
  • the receptacle can be integral with the apron guide section in the region of the entrance section or can be formed as a separate component that can be coupled to the entrance section, for example via a support unit, as described in more detail below.
  • the receptacle and the tensioning element replaceably accommodated in the receptacle are formed at a distance from the area of the apron guide section enclosed by the tensioning element and the deflection section.
  • the top apron is guided by the tensioning element while forming an air gap interposed between the tensioning element and the deflection section and between the inner side of the top apron and the opposite surface side of the apron guide section.
  • the guide plane formed by the tensioning element and the deflection section which corresponds to an inside surface section of the feeding top apron, extends at a distance from the surface section of the apron guide section, which is enclosed by the tensioning element and the deflection section in the guiding direction or along the guide plane, respectively.
  • the tensioning element which can generate a uniform tension depending on its configuration due to it being arranged inside the top apron in the operating condition, enables individual adjustment of the apron tension depending on the configuration of the tensioning element. Tolerances in the apron length can be compensated for by selecting the size of the tensioning element, in which case the apron tension can be set with high accuracy.
  • the apron guide section has, at its end forming the deflection section, a further receptacle which is configured for receiving a replaceable deflection element for deflecting the circumferentially guided top apron, as well as the deflection element.
  • a further receptacle which is configured for receiving a replaceable deflection element for deflecting the circumferentially guided top apron, as well as the deflection element.
  • the use of a deflection element formed separately from the apron guide section also enables precise adjustment of the distance between the apron and the downstream output roller pair, which is crucial for a uniform yarn and piecing quality.
  • the deflection element By using the deflection element, the distance can be precisely adjusted in a reproducible manner.
  • the deflection element can form an additional tensioning element by means of which the adjustment of the apron tension can be favourably supported with high precision.
  • the embodiment of the tensioning element and its arrangement on the top apron cradle in the area of the entry section of the apron guide section and the embodiment of the deflection element and its arrangement on the top apron cradle in the area of the deflection section of the apron guide section are basically freely selectable.
  • the receptacle and/or the further receptacle to be formed by two guiding means or guides that are spaced apart for lateral guidance of the top apron, and for the tensioning element or the deflection element to be configured as a guide bar which is arranged in the region between the guiding means and extending in its longitudinal axis direction in the direction of the guiding means until the receptacle or further receptacle, the two guiding means being arranged in particular at a lateral edge of the apron guide section and in particular being integrally formed with that.
  • An alignment of the guide bar to the guiding means which thereby runs transversely to the circumferential direction of the top apron ensures uniform application of the tension applied to the top apron by the guide bar, in which case the transverse alignment of the guide bar to the guiding means guiding the top apron laterally ensures that no forces acting transversely to the circumferential direction of the top apron are applied to the top apron by the guide bar.
  • the transverse alignment effectively prevents twisting of the top apron in the contact area with the guide bar.
  • the tensioning element or the deflection element is accommodated in the respective receptacle or further receptacle perpendicular to the circumferential direction of the top apron, as a result of which compressive forces directed exclusively in the guiding direction are applied to the tensioning element and its receptacle or to the deflection element and its further receptacle.
  • the arrangement of the tensioning element or the deflection element, in particular as a corresponding or individually configured guide bar, can basically be carried out in any way.
  • the tensioning element or the deflection element can be arranged detachably on the top apron cradle in a fixed position so that, depending on the tension to be set on the top apron and/or with reference to the deflection element, differently configured guide bars with different lengths of contact area can be used depending on the distance to be set from the outlet roller in order to achieve optimum alignment of the top apron.
  • the tensioning element and/or the deflection element has at least one retaining pin, the receptacle or the further receptacle being configured to accommodate the retaining pin for interchangeably accommodating the tensioning element or the deflection element, the retaining pin, of which there is at least one, extending transversely to a guide bar of the tensioning element or of the deflection element, which guides the top apron.
  • the tensioning element or the deflection element forms a cross-sectional T-shape in a sectional plane running along the guide bar through the guide bar and the retaining pin.
  • such a cross-sectional shape transitions into a Tr-shape, which allows greater stability than the T-cross section.
  • a support unit associated with the apron guide unit which forms the receptacle for the tensioning element or the further receptacle for the deflection element and on which the tensioning element or deflection element, in particular configured as a guide bar, is detachably arranged, the support unit being supported on the top apron cradle, in particular on the apron guide unit.
  • a support unit to be arranged on the top apron cradle, which is configured to receive the tensioning element or the deflection element in a detachable and thus exchangeable manner.
  • the use of a support unit ensures that it can be adapted to the embodiment of the tensioning element or the deflection element and that it can be easily replaced in order to set the desired apron tension or to adjust the distance from the outlet roller.
  • the support unit accommodating the tensioning element or the deflection element is supported on the top apron cradle at such a point that, in the operating condition of the top apron cradle, reliable contact of the tensioning element or the deflection element with the inner side of the top apron can be ensured and, at the same time, the top apron can be easily replaced if necessary.
  • the support unit is arranged in such a way that the receptacle or the further receptacle is arranged adjacent to the lateral guiding means in the circumferential direction or guiding direction of the top apron.
  • the tensioning element to be mounted or accommodated in the receptacle and/or the deflection element to be mounted or accommodated in the further receptacle in a direction opposite to the apron guide section, i.e. in the direction of the top apron, pretensioned, in particular spring-pretensioned.
  • a pretensioned contact of the tensioning element or the deflection element on an inner side of the top apron ensures that the latter can be pretensioned in a particularly uniform manner and that fluctuations occurring during operation can be compensated for by the pretension, in particular spring-pretension, so that a particularly trouble-free operation of an apron drafting system equipped with the top apron cradle can be ensured.
  • a spring unit is provided assigned to the receptacle and/or the further receptacle.
  • the spring unit can further preferably be arranged in the receptacle or the further receptacle.
  • the spring unit makes it possible, if necessary, to replace the tensioning element or the deflection element while maintaining a pretension created by the spring unit, thereby making it possible to adapt quickly to different top aprons in a simple and convenient manner. It is particularly advantageous for the spring unit to be configured to adjust the pretension acting on the tensioning element or the deflection element.
  • the possibility of adjusting the pretension makes it possible to make adjustments to the apron length and the apron tension to be achieved or the distance from the downstream outlet roller in a particularly precise and convenient manner, without it being absolutely necessary to replace the tensioning element or the deflection element for the desired adjustment.
  • the receptacle and/or the further receptacle to be configured for interchangeably accommodating at least one adapter element, in which case the adapter element, of which there is at least one, can be coupled to the tensioning element and/or to the deflection element in order to change or adapt the position of the tensioning element and/or of the deflection element relative to the apron surface section in the coupled and accommodated condition.
  • the apron tension can be individually adjusted using different adapter elements.
  • the selected apron tension can thus be easily determined by exchanging the differently configured adapter elements.
  • the adapter elements can be slotted so that they can be placed on the tensioning element or on the deflection element or on an associated retaining pin and easily removed again if required.
  • an apron drafting arrangement is proposed for a textile machine such as a pre-spinning machine, in particular for a roving frame, or a spinning machine, in particular for a ring spinning or air-spinning machine, having a first drivable roller pair and a second drivable roller pair for drafting a fibre band, the first and second roller pairs being arranged at a distance from one another in the fibre band transport direction between a top and bottom roller of each roller pair for the clamping transport of the fibre band, the first and second roller pairs being drivable at different rotational speeds in the operating condition of the apron drafting system to form a drafting zone lying between the nip lines of the first and second roller pairs, and with a top apron cradle arranged between the first and second roller pairs, the top apron cradle in the drafting zone guiding a top apron having a top roller of the first roller pair looped around it circum
  • FIG. 1 is a perspective view of a top apron cradle
  • FIG. 2 a illustrates a first embodiment of an adapter element
  • FIG. 2 b illustrates a second embodiment of an adapter element
  • FIG. 2 c illustrates an third embodiment of an adapter element.
  • FIG. 1 shows a perspective view of a top apron cradle 1 of an apron drafting system not shown here, according to an embodiment example.
  • the top apron cradle 1 has two top roller bearing units 2 at a distance from one another, which are connected to a base carrier 9 of an apron guide unit 4 .
  • the apron guide unit 4 has an apron guide section 11 which is laterally bounded by bar-like guiding means 5 which, in an operating condition of the top apron cradle 1 , bounds a lateral running path of an endless top apron which is not shown here.
  • the top apron is guided over the top roller 3 in the direction of the apron guide section 11 .
  • the apron guide section 11 has an entrance section 11 a and a deflection section 6 spaced apart from the latter.
  • the deflection section 6 has a bar-shaped deflection element 6 a which the top apron is guided around.
  • the deflection element 6 a is held in a replaceable manner in a further receptacle which is not shown.
  • the deflection element 6 a is configured as a guide bar.
  • the distance from a downstream top roller of an output roller pair, which is not shown, of the apron drafting system can be variably adjusted in the fibre band transport direction.
  • a tensioning element 7 in the form of a guide bar extends between the guiding means 5 and is detachably connected to the guiding means 5 .
  • the tensioning element 7 rests against an inner side of the top apron and causes the apron pretension via its contact area.
  • the tensioning element 7 is interchangeably held in receptacles 10 , the receptacles 10 being formed by the guiding means 5 according to this preferred embodiment example.
  • the receptacle can be part of a support unit associated with the apron guide unit 4 , on which the tensioning element 7 is detachably arranged, the support unit being supported on the top apron cradle 1 .
  • the receptacle can be arranged adjacent or next to the guiding means 5 in the guiding direction.
  • the apron tension as well as the distance from the outlet roller can be changed by the arrangement of different adapter elements 8 a , 8 b , 8 c (see FIGS. 2 a to 2 c ) correspondingly on the tensioning element 7 or the deflection element 6 a , in which case the respective adapter element 8 a , 8 b , 8 c can be accommodated by the receptacle 10 or the further receptacle.
  • the adapter elements 8 a , 8 b , 8 c when in the accommodated status and coupled to the tensioning element 7 or the deflection element 6 a , cause a change in position of the same relative to the apron surface section 11 and thus, depending on the adapter element 8 a , 8 b , 8 c used or its embodiment, the apron tension or the distance to the outlet roller, correspondingly.
  • the adapter elements 8 a , 8 b , 8 c can be detachably connected to the tensioning element 7 and/or the deflection element 6 a , allowing them to be pushed on and thus easily removed from the element if required.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US17/835,255 2021-06-10 2022-06-08 Top apron cradle for an apron drafting system of a textile machine Pending US20220396900A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU102828A LU102828B1 (de) 2021-06-10 2021-06-10 Oberriemchenhalter für ein Riemchenstreckwerk einer Textilmaschine
LU102828 2021-06-10

Publications (1)

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US20220396900A1 true US20220396900A1 (en) 2022-12-15

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ID=77127026

Family Applications (1)

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US17/835,255 Pending US20220396900A1 (en) 2021-06-10 2022-06-08 Top apron cradle for an apron drafting system of a textile machine

Country Status (5)

Country Link
US (1) US20220396900A1 (enrdf_load_stackoverflow)
EP (1) EP4101955B1 (enrdf_load_stackoverflow)
JP (1) JP2022189783A (enrdf_load_stackoverflow)
CN (1) CN115467059B (enrdf_load_stackoverflow)
LU (1) LU102828B1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20240199370A1 (en) * 2022-12-20 2024-06-20 Saurer Spinning Solutions Gmbh & Co. Kg Device for positioning a roller or for tensioning a belt, drawing device, spinning unit and spinning machine comprising such a device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2686938A (en) * 1949-02-02 1954-08-24 Noguera
US2777168A (en) * 1951-08-09 1957-01-15 Noguera
US3386136A (en) * 1964-05-08 1968-06-04 Deering Milliken Res Corp Drafting system
EP3744881A1 (de) * 2019-05-31 2020-12-02 Maschinenfabrik Rieter AG Käfig für ein druckwalzenpaar eines streckwerks

Family Cites Families (11)

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Publication number Priority date Publication date Assignee Title
CH300542A (de) * 1952-03-06 1954-08-15 Suddeutsche Spindelwerke Zinse Zweiriemchenstreckwerk mit zapfenlosen Oberwalzen für Textilmaschinen.
DE6805009U (de) * 1968-11-02 1969-04-03 Zinser Textilmaschinen Gmbh Doppelriemchenstreckwerk
JPS5787074U (enrdf_load_stackoverflow) * 1980-11-18 1982-05-28
DE102005005382A1 (de) * 2005-02-05 2006-08-10 Texparts Gmbh Oberwalzenträger für Streckwerke an Spinnmaschinen
DE102007003158A1 (de) * 2007-01-18 2008-07-24 Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh Streckwerks-Anordnung
DE102007054318A1 (de) * 2007-10-31 2009-05-07 Wilhelm Stahlecker Gmbh Streckwerk mit zwei Führungsriemchen
DE102009030367A1 (de) * 2009-06-25 2010-12-30 Oerlikon Textile Components Gmbh Oberriemchenhalter für Streckwerke von Spinnereimaschinen
DE102014110950A1 (de) * 2014-08-01 2016-02-04 Deutsche Institute Für Textil- Und Faserforschung Denkendorf Walzenstreckanordnung einer Arbeitsstelle einer stapelfaserverarbeitenden Textilmaschine sowie damit ausgestattete Textilmaschine
EP3461938B1 (en) * 2017-09-29 2021-09-29 Pinter Caipo, S.A.U. Cradle assembly for a drafting device of a spinning machine
DE102019110881A1 (de) * 2019-04-26 2020-10-29 Saurer Intelligent Technology AG Riemchenstreckwerk
CN110184693A (zh) * 2019-06-05 2019-08-30 广众纺机科技(东莞)有限公司 一种曲线牵伸系统以及具有该曲线牵伸系统的细纱机

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2686938A (en) * 1949-02-02 1954-08-24 Noguera
US2777168A (en) * 1951-08-09 1957-01-15 Noguera
US3386136A (en) * 1964-05-08 1968-06-04 Deering Milliken Res Corp Drafting system
EP3744881A1 (de) * 2019-05-31 2020-12-02 Maschinenfabrik Rieter AG Käfig für ein druckwalzenpaar eines streckwerks

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20240199370A1 (en) * 2022-12-20 2024-06-20 Saurer Spinning Solutions Gmbh & Co. Kg Device for positioning a roller or for tensioning a belt, drawing device, spinning unit and spinning machine comprising such a device

Also Published As

Publication number Publication date
CN115467059A (zh) 2022-12-13
LU102828B1 (de) 2022-12-12
EP4101955A1 (de) 2022-12-14
EP4101955B1 (de) 2024-06-05
JP2022189783A (ja) 2022-12-22
CN115467059B (zh) 2024-09-24

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