EP2183416B1 - Device for the detection of breaking of a fibre web - Google Patents

Device for the detection of breaking of a fibre web Download PDF

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Publication number
EP2183416B1
EP2183416B1 EP08789664.3A EP08789664A EP2183416B1 EP 2183416 B1 EP2183416 B1 EP 2183416B1 EP 08789664 A EP08789664 A EP 08789664A EP 2183416 B1 EP2183416 B1 EP 2183416B1
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EP
European Patent Office
Prior art keywords
web
detection
detection element
area
previous
Prior art date
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Active
Application number
EP08789664.3A
Other languages
German (de)
English (en)
French (fr)
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EP2183416A1 (en
Inventor
Antonello Brandolin
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.)
Marzoli Machines Textile SRL
Original Assignee
Marzoli SpA
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Publication date
Application filed by Marzoli SpA filed Critical Marzoli SpA
Publication of EP2183416A1 publication Critical patent/EP2183416A1/en
Application granted granted Critical
Publication of EP2183416B1 publication Critical patent/EP2183416B1/en
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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
    • D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
    • D01H13/16—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material
    • D01H13/1616—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material characterised by the detector
    • D01H13/1625—Electro-mechanical actuators
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G31/00—Warning or safety devices, e.g. automatic fault detectors, stop motions
    • 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
    • D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
    • D01H13/16—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material
    • D01H13/18—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material stopping supply only
    • D01H13/186—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material stopping supply only guiding or drafting cylinders moving by gravity when a yarn breakage occurs

Definitions

  • the present invention relates to a device for the detection of breaking of a fibre web, which can be used in machinery used for processing webs.
  • the web then undergoes further processing, downline from carding, for example in a draw frame, a lap winder or combing machine, for the main purpose of obtaining a cleaner web with as regular a gauge as possible and well paralleled fibres.
  • machine downtime affects both production costs and the quality of the web, especially the repeatability of the desired production features of the web (degree of cleanliness, regularity of the gauge).
  • document CH 383228 shows a machine receiving two webs from two cans and a device for the detection of breaking formed by a fixed cylinder and a mobile cylinder, which holds the web against the fixed cylinder by means of a spring.
  • the breaking of the web causes contact between the cylinders, closing a circuit which signals the breakage.
  • Document DE 1 172 167 shows a detection device formed by a light emitter and a receiver.
  • the beam emitted is interrupted by the web when intact.
  • the web breaks, the ray of light reaches the receiver, which signals the breaking.
  • Document GB 886,525 shows a lever identification device, wherein the yarn, when intact, keeps a hinged lever in a raised position, against gravity. Following breaking of the yarn, the lever rotates, striking against a plate, which blocks the machine.
  • Document US 3,330,007 shows a pile-operated detection device, composed of a frame and a lever, separated electrically from the frame when the web is intact. Following breaking of the web, the web continually fed by the rollers upline piles up under the lever, raising it and putting it in contact with the frame. The blocking circuit is thus closed.
  • Document JP-59-168138 shows a detection device comprising optic fibres and a receiver. When the yarn breaks, the beam of light emitted by the fibres is collected by the receiver, which sends a blocking signal.
  • a further known detection device comprises a plurality of small, freely moving rollers lying on the web, supported by rotating cylinders placed below the web. When one of the webs breaks, the relative roller falls onto the cylinder below it, closing the blocking circuit.
  • the aim of the present invention is to create a detection device which overcomes the drawbacks spoken of with reference to the known art, at the same time satisfying the aforesaid requirements.
  • reference numeral 1 globally denotes a device for the detection of breaking of a fibre web according to the present invention.
  • the detection device 1 comprises a frame 2, to which the components of the device are connected, which can be joined to a machine for mounting the said device to the machine.
  • the frame 2 comprises a flat bottom wall 4, a side wall 6, joined to the bottom wall 4 and jutting out from it, for example perpendicularly, and an exit wall 8, joined to the lateral wall and inclined so as to be practically parallel to the bottom wall.
  • the frame 2 comprises in addition lateral ends 9a, 9b which define the device transversally.
  • the device 1 has an entrance area 10, where the web goes into after coming out of processing by other devices or machinery upline of the detection device, for example from a carding machine.
  • the device has an exit area 12, where the web comes out of before being directed towards further processing, performed by further devices or machines downline of the detection device 1, for example to the draft unit of a draw frame.
  • the web moves along a direction of movement X, in a direction of advancement.
  • the device 1 comprises at least one detection element 20, free to move so as to be suitable to move by falling, in a falling direction Y, from an area of normal functioning 22, when the web is intact, to a signalling area 24, when the web incurs a breakage.
  • the detection element 20 is supported by the web in transit between the entrance area 10 and the exit area 12, so as to remain in the area of normal functioning 22, above the web itself.
  • the detection element 20 is of such a weight as to be supported in the normal functioning area 22 solely by the web in transit.
  • the detection element 20 in fact, is sufficiently light to be supported by the web itself in transit, without the assistance of rotating rollers below the web itself.
  • the detection element 20 is an internally hollow body, for example made from non-conductive material, such as a plastic material.
  • the detection element 20 is of a suitable geometric shape to facilitate its rolling over the web in transit.
  • the detection element 20 is a body having a circular transversal cross-section.
  • the detection element 20 is an essentially spherical body.
  • the device 1 comprises means of detection to detect the presence of said detection element 20 in the signalling area 24.
  • the means of detection comprise an emitter 30 of a detection signal, such as a beam of light, and a receiver 32.
  • the signal emitted by the emitter 30 reaches the receiver 32 undisturbed; when, following breaking of the web, the detection element 20 loses its support and falls into the signalling area 24, this obstructs the passage of the signal from the emitter to the receiver, in that it is made in such a form, size and material as to be opaque to said signal.
  • the receiver 32 not receiving any detection signal, emits a blocking signal to stop the machine.
  • the means of detection comprise two electrically uncoupled electric elements which, when the detection element falls, become electrically connected, thus closing the blocking circuit.
  • the means of detection are positioned at a height such as to be disengaged structurally from the detection element 20 when said detection element is supported by the.intact web.
  • the detection element is supported only by the web, without the help of other organs, for example belonging to such means of detection.
  • the device 1 comprises, in addition, means of positioning to limit the movement of the detection element between the entrance area 10 and the exit area 12.
  • the means of positioning limit the movement of the detection element in the direction of movement X of the web.
  • Said means of positioning comprise a number of rods 40, 140 extending mainly along the falling direction Y of the detection element 20, arranged so as to form a cage for the detection elements.
  • the area of normal functioning 22 and the signalling area 24 are defined between said rods 40, 140 in the direction of falling Y.
  • said means of positioning limit the movement of the detection element 20 in the transversal direction T.
  • Said rods 40, 140 are spaced along the transversal direction T.
  • said rods 40, 140 are sized and spaced so as to prevent the passage of the detection element 20 between them, and also, preferably, to prevent contact between one detection element and the one transversally alongside it.
  • the means of positioning comprise two rows of rods 40 spaced along the direction of movement X of the web, wherein each row has rods spaced out in the transversal direction T ( figures 1 to 3 ).
  • Each detection element 20 is limited in its movement by four rods 40, moving inside the cage formed by these.
  • the means of positioning comprise shaped rods 140 which have at least one concave side 142 such as to accommodate the detection element 20 partially to limit its movement ( figures 4 to 6 ).
  • the shaped rod 140 has a normal cross-section, obtained with a plane perpendicular to the direction of falling Y of the detection element 20, having a concave indentation on the side of the detection element, forming said concave side 142.
  • the shaped rod 140 has at least one rounded head 144, at least above such indentation.
  • the shaped rod 140 has a cross-section in the shape of an "8", with two heads 144 at the extremities, joined by a neck 146 thinner than the heads, which makes the concave side 142.
  • the shaped heads help the web to slide along and limit the occurrence of undesired winding.
  • the device 1 comprises means of cleaning suitable to free the operating area of the detection device from any residues which may have detached from the web while running through.
  • the means of cleaning comprise means of suction comprising at least one nozzle 150 connected to a suction device.
  • the nozzle 150 is positioned on the bottom 4 of the frame 2 of the device 1, in the transversal band occupied by the rods 40, 140, preferably in line with the optic eye of the detection device.
  • the means of cleaning comprise a blowing mechanism suitable to blow away the residues from the operating area of the detection device.
  • the device 1 comprises means of guidance suitable to guide the web between the entrance area 10 and the exit area 12.
  • the means of guidance comprise a bar upline 50 and a bar downline 52 extending mainly in a transversal direction T, spaced along the direction of movement X.
  • the bars 50, 52 are circular cylindrical.
  • a plane tangent to the external surface of said bars 50, 52 defines a plane of movement of the web and that the signalling area 24 is defined below the tangent plane, in the direction of falling Y of the detection element 20.
  • the means of guidance comprise a diverter bar 60, positioned upline of the upline bar 50, extending mainly in a transversal direction T.
  • the bars 50, 52 are attached to the sides 9a, 9b, while the rods 40, 140 are attached to the bottom wall 4.
  • the device 1 comprises a number of detection elements 20, positioned alongside each other transversally, each element being destined to be supported by its respective web.
  • the detection device according to the present invention makes it possible to overcome the drawbacks of the known state of the art.
  • the web does not suffer from false draws caused by heavy organs supported by it or pressed against it.
  • the web is, therefore, free to run along.
  • the spherical elements have an accentuated propensity to roll freely in that they minimise the points of contact with the surrounding means of positioning.
  • the device makes it possible to limit undesired windings of the web.
  • the device satisfies the requisites highlighted previously, in that it detects breaking only when this actually happens, in that the fluctuations of the web in transit do not influence the means of detection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP08789664.3A 2007-09-03 2008-09-01 Device for the detection of breaking of a fibre web Active EP2183416B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBS20070131 ITBS20070131A1 (it) 2007-09-03 2007-09-03 Dispositivo di rilevazione della rottura di un nastro di fibra
PCT/IB2008/053532 WO2009031090A1 (en) 2007-09-03 2008-09-01 Device for the detection of breaking of a fibre web

Publications (2)

Publication Number Publication Date
EP2183416A1 EP2183416A1 (en) 2010-05-12
EP2183416B1 true EP2183416B1 (en) 2014-03-26

Family

ID=40174790

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08789664.3A Active EP2183416B1 (en) 2007-09-03 2008-09-01 Device for the detection of breaking of a fibre web

Country Status (5)

Country Link
EP (1) EP2183416B1 (it)
CN (1) CN101827963B (it)
BR (1) BRPI0816300B1 (it)
IT (1) ITBS20070131A1 (it)
WO (1) WO2009031090A1 (it)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49127507U (it) * 1973-02-28 1974-11-01

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1589648A (en) * 1923-05-19 1926-06-22 Charles W Hubbard Stop motion
FR1288818A (fr) * 1961-02-14 1962-03-30 Alsacienne Constr Meca Casse-mèche de machine textile
CH478264A (de) * 1966-08-09 1969-09-15 Luwa Ag Verfahren zur Überwachung des Luntenlaufes an Flügelspinnmaschinen
ES168927Y (es) * 1971-05-14 1972-05-01 Riera Masot Dispositivo para-mechas.
US4095062A (en) * 1976-09-03 1978-06-13 Platt Saco Lowell Limited Stop-motion apparatus
CN2043976U (zh) * 1988-09-10 1989-09-06 史品山 红外式数字显示断纱(线)自动控制器
US5429157A (en) * 1993-09-07 1995-07-04 Plemons; G. Dale Blade type drop wire
CN2405215Y (zh) * 2000-02-03 2000-11-08 山西经纬合力机械制造公司总厂 用于一种精梳机的光电检测装置
CN2851299Y (zh) * 2005-10-20 2006-12-27 青岛环球集团股份有限公司 并条机断条红外线同步监控器

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49127507U (it) * 1973-02-28 1974-11-01

Also Published As

Publication number Publication date
WO2009031090A1 (en) 2009-03-12
CN101827963B (zh) 2012-02-15
EP2183416A1 (en) 2010-05-12
ITBS20070131A1 (it) 2009-03-04
CN101827963A (zh) 2010-09-08
BRPI0816300B1 (pt) 2017-12-12
BRPI0816300A2 (pt) 2015-11-24

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