EP2183416A1 - Device for the detection of breaking of a fibre web - Google Patents

Device for the detection of breaking of a fibre web

Info

Publication number
EP2183416A1
EP2183416A1 EP08789664A EP08789664A EP2183416A1 EP 2183416 A1 EP2183416 A1 EP 2183416A1 EP 08789664 A EP08789664 A EP 08789664A EP 08789664 A EP08789664 A EP 08789664A EP 2183416 A1 EP2183416 A1 EP 2183416A1
Authority
EP
European Patent Office
Prior art keywords
detection
web
detection element
area
movement
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
Application number
EP08789664A
Other languages
German (de)
French (fr)
Other versions
EP2183416B1 (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
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 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
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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 .
  • 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 . When 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.
  • 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.
  • Document US 5,023,976 shows a detection device composed of bars bearing sensors, one for each web fed in.
  • Other patent documents show further detection devices, functionally similar to those described above.
  • 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 .
  • figure 1 shows a perspective view of a device according to an embodiment of the present invention
  • figure 2 shows a lateral view of the detection device of figure 1;
  • figure 3 illustrates an overhead view of the detection device in figure 1.
  • figure 4 shows a perspective view of a detection device according to a further embodiment of the present invention
  • figure 5 represents a lateral view of the detection device in figure 4; and [0027] figure 6 illustrates an overhead view of the detection device in figure 4.
  • reference numeral 1 globally denotes a device for the detection of breaking of a fibre web according to the present invention.
  • the device described below with reference to a fibre web, may also be used to detect breaking of a yarn, for example in a roving frame or spinning unit.
  • 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, which 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, which 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 device 1 comprises, in addition, 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 in 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.
  • Below the web rather is the signalling area 24, which the detection element 20 enters by falling when the web breaks . f
  • 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, in addition, 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, made with a plane containing the direction of movement X of the web.
  • the detection element 20 is an essentially spherical body.
  • the device 1 comprises means of detection suitable 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.
  • a detection signal such as a beam of light
  • 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. In other words, the detection element is supported only by the web, without the help of other organs, for example belonging to such means of detection.
  • the dev.ice 1 comprises, in addition, means of positioning suitable to limit the movement of the detection element between the entrance area 10 and the exit area 12.
  • the means of positioning are suitable to 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 140 in the direction of falling Y.
  • said means of positioning are suitable to 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 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)

Abstract

The present invention relates to a device for the detection (1) of breaking of a fibre web comprising a number of spherical detection elements (20) held by rods (140).

Description

"Device for the detection of breaking of a fibre web"
DESCRIPTION
[001] 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 .
[002] It is well-known that the processing of flock fibre to obtain a web is first performed on blow room machines, destined to produce a fibre still in flock form but partially cleansed, destined for processing on the carding machine, which it comes off in the form of a web. [003] 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.
[004] During processing on the machines downline of the carding machine, and especially on the draw frame, the lap winder or combing machine, it is extremely important to immediately detect breaking of the web, so as to promptly stop the machine from running, reunite the sections and resume processing.
[005] In this sector it is therefore extremely important to have a device which detects breaking of the web suitable to immediately detect such breaking, but also suitable to reliably detect such, in other words when the breaking effectively arises.
[006] In fact, 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) .
[007] Numerous detection devices exist which are known of in the art.
[008] For example, 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. [009] 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 . When the web breaks, the ray of light reaches the receiver, which signals the breaking. [0010] 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. [0011] 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. [0012] 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. [0013] Document US 5,023,976 shows a detection device composed of bars bearing sensors, one for each web fed in. [0014] Other patent documents show further detection devices, functionally similar to those described above.
[0015] 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 .
[0016] However the solutions known of today have some drawbacks . [0017] The solutions in which a component is pressed against the web by a spring, give rise to an action resisting the advancement of the web, which translates into undesired drawing of it . The same happens when the device has small rollers supported by the web and by the rotating rollers under it. As is said in the trade "false draws" are generated.
[0018] While the solutions which foresee the use of light sources alone in which interruption of the beam determines a block signal are not very reliable in that the webs, travelling at very high speeds tend to fluctuate, so that it is possible for a beam of light to be interrupted by a fluctuating but intact web. On the other hand, again for such type of devices, it is possible for the web to break but on account of the fluctuations, the broken ends of the section of web upline and downline of the breakage do not intercept the luminous beam so that no blocking signal is generated.
[0019] 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 .
[0020] Such purpose is achieved by a detection device made according to claim 1. The dependent claims describe embodiment variations. [0021] The characteristics and advantages of the detection device according to the present invention will be evident from the description given below, made by way of an indicative and non-limiting example according to the attached figures, wherein:
[0022] figure 1 shows a perspective view of a device according to an embodiment of the present invention;
[0023] figure 2 shows a lateral view of the detection device of figure 1; and
[0024] figure 3 illustrates an overhead view of the detection device in figure 1. ; [0025] figure 4 shows a perspective view of a detection device according to a further embodiment of the present invention;
[0026] figure 5 represents a lateral view of the detection device in figure 4; and [0027] figure 6 illustrates an overhead view of the detection device in figure 4.
[0028] With reference to the attached figures, reference numeral 1 globally denotes a device for the detection of breaking of a fibre web according to the present invention. The device, described below with reference to a fibre web, may also be used to detect breaking of a yarn, for example in a roving frame or spinning unit.
[0029] 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.
[0030] Preferably, 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 . [0031] The frame 2 comprises in addition lateral ends 9a, 9b which define the device transversally. [0032] The device 1 has an entrance area 10, which 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 .
[0033] Furthermore, the device has an exit area 12, which 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.
[0034] From the entrance area 10 towards the exit area 12, the web moves along a direction of movement X, in a direction of advancement.
[0035] The device 1 comprises, in addition, 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 in a breakage. [0036] In other words, 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. [0037] Below the web rather is the signalling area 24, which the detection element 20 enters by falling when the web breaks . f
[0038] 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.
[0039] 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. [0040] For example, the detection element 20 is an internally hollow body, for example made from non- conductive material, such as a plastic material. [0041] The detection element 20, in addition, is of a suitable geometric shape to facilitate its rolling over the web in transit .
[0042] For example, having defined a transversal direction T as a direction perpendicular to the direction of movement X and to the direction of falling Y, the detection element 20 is a body having a circular transversal cross-section, made with a plane containing the direction of movement X of the web.
[0043] Preferably, the detection element 20 is an essentially spherical body.
[0044] Furthermore, the device 1 comprises means of detection suitable to detect the presence of said detection element 20 in the signalling area 24.
[0045] For example, the means of detection comprise an emitter 30 of a detection signal, such as a beam of light, and a receiver 32. [0046] In conditions of normal functioning, 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.
[0047] The receiver 32, not receiving any detection signal, emits a blocking signal to stop the machine. [0048] In further embodiments, the means of detection comprise two electrically uncoupled electric elements which, when the detection element falls, become electrically connected, thus closing the blocking circuit . [0049] It may be noted however that 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. In other words, the detection element is supported only by the web, without the help of other organs, for example belonging to such means of detection.
[0050] According to a preferred embodiment, the dev.ice 1 comprises, in addition, means of positioning suitable to limit the movement of the detection element between the entrance area 10 and the exit area 12.
[0051] In other words, the means of positioning are suitable to limit the movement of the detection element in the direction of movement X of the web. [0052] For example, 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. [0053] The area of normal functioning 22 and the signalling area 24 are defined between said rods 140 in the direction of falling Y.
[0054] Furthermore, preferably, said means of positioning are suitable to limit the movement of the detection element 20 in the transversal direction T. For example, said rods 40, 140 are spaced along the transversal direction T. [0055] Specifically, 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.
[0056] According to one embodiment, 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) .
[0057] Each detection element 20 is limited in its movement by four rods 40, moving inside the cage formed by these. [0058] In a further embodiment variation, 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) . [0059] Specifically, 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. [0060] Preferably, in addition, the shaped rod 140 has at least one rounded head 144, at least above such indentation .
[0061] For example, 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.
[0062] Advantageously, the shaped heads help the web to slide along and limit the occurrence of undesired winding . [0063] According to a further embodiment, 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 .
[0064] Preferably, the means of cleaning comprise means of suction comprising at least one nozzle 150 connected to a suction device.
[0065] For example, 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.
[0066] According to one embodiment variation, the means of cleaning comprise a blowing mechanism suitable to blow away the residues from the operating area of the detection device. [0067] Preferably, in addition, the device 1 comprises means of guidance suitable to guide the web between the entrance area 10 and the exit area 12.
[0068] For example, 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. For example, the bars 50, 52 are circular cylindrical .
[0069] It may be noted that 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.
[0070] Preferably, in addition, the means of guidance comprise a diverter bar 60, positioned upline of the upline bar 50, extending mainly in a transversal direction T.
[0071] Preferably, the bars 50, 52 are attached to the sides 9a, 9b, while the rods 40, 140 are attached to the bottom wall 4. [0072] Preferably, in addition, 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.
[0073] Innovatively, the detection device according to the present invention makes it possible to overcome the drawbacks of the known state of the art.
[0074] Specifically, the web does not suffer false draws caused by heavy organs supported by it or pressed against it. The web is, therefore, free to run along. [0075] Advantageously, in addition, the spherical elements have an accentuated propensity to roll freely in that they minimise the points of contact with the surrounding means of positioning. [0076] According to a further advantageous aspect, the device makes it possible to limit undesired windings of the web .
[0077] In addition, 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.
[0078] It is clear that a person skilled in the art may make variations and modifications to the device described above so as to satisfy contingent and specific requirements, all moreover contained within the scope of protection as defined by the appended claims.

Claims

1. Device for the detection (1) of breaking of a fibre web suitable to detect breaking of the web, comprising:
- an entrance area (10) , which the web coming out of- devices upline of said detection device goes into;
- an exit area (12) , which the web comes out of, directed towards a device downline of said detection device, the web in transit from the entrance area to the exit area defining a direction of movement X) ; - a detection element (20) , freely-moving so as to be suitable to move by falling, in a direction of falling
(Y) , from an area of normal functioning (22) , when the web is intact, to a signalling area (24) when the web breaks, a transversal direction (T) being defined as a perpendicular direction to the direction of movement and the direction of falling;
- means of detection suitable to detect the presence of said detection element in the signalling area; wherein the detection element has such a weight as to be supported in said normal functioning area exclusively by the web in transit.
2. Device according to claim 1 , wherein the means of detection are positioned at such a height as to be structurally disengaged from the detection element when said detection element is supported by the intact web.
3. Device according to claim 1 or 2 , wherein said means of detection comprise an emitter (30) suitable to emit a detection signal and a receiver (32) suitable to receive said detection signal, wherein the detection element is at least partially opaque to said detection signal.
4. Device according to claim 3 , wherein the detection element is made in plastic material and said emitter is suitable to emit a luminous beam as a detection signal.
5. Device according to any of the previous claims, wherein the detection element is an internally hollow body.
6. Device according to any of the previous claims , wherein the detection element is made in electrically non-conductive material.
7. Device according to claim 6, wherein said material is a plastic material.
8. Device according to any of the previous claims , wherein the detection element is a body with a circular transversal cross-section, made with a plane containing said direction of movement of the web.
9. Device according to claim 7 , wherein the detection element is an essentially spherical body.
10. Device according to any of the previous claims, comprising, in addition - means of positioning suitable to limit the movement of the detection element between the entrance area and the exit area.
11. Device according to claim 10, wherein said means of positioning comprises a number of rods (40,140), extending mainly in the falling direction (Y) of the detection element (20) , between which the area of normal - functioning and the signalling area are defined in the direction of movement.
12. Device according to claim 10 or 11, wherein the means of positioning are suitable, in addition, to limit the movement of the detection element in said transversal direction (T) .
13. Device according to claim 12 , wherein said means of positioning comprise a number of rods (40,140), extending mainly in the falling direction of the detection element, spaced along the transversal direction.
14. Device according to claim 11, wherein the rods (140) are shaped and have at least one concave side (142) such as to partially accommodate the detection element (20) to limit its movement.
15. Device according to claim 14, wherein the shaped rod (140) has at least one rounded head (144) , at least above the indentation.
16. Device according to any of the previous claims, comprising, in addition, means of guidance suitable to guide the web between the entrance area and the exit area.
17. Device according to claim 16, comprising a bar upline (50) and a bar downline (52) , extending mainly in a transversal direction (T) , spaced along the direction of movement (X) .
18. Device according to claim 17, wherein a plane tangent to the external surface of said bars defines the plane of movement of the web, said signalling area being defined below the tangent plane, in the falling direction of the detection element .
19. Device according to claims 17 or 18, wherein said means of guidance comprise, in addition, a diverter bar
(60) , positioned upline of the upline bar, extending mainly in a transversal direction.
20. Device according to any of the previous claims, comprising a frame (2) to support the components of the device, which can be joined in a detachable manner to a machine, to mount the detection device to said machine.
21. Device according to any of the previous claims, comprising a number of detection elements, positioned alongside each other transversally.
22. Device according to any of the previous claims, comprising means of cleaning suitable to free the operating area of the means of detection from the residues of the web running along.
23. Device according to claim 22, wherein the means of cleaning comprise means of suction comprising a nozzle (150) connected to a suction device.
24. Draw frame comprising at least one device for the detection of breaking of a fibre web made according to any of the claims from 1 to 23.
25. Lap winder comprising at least one device for the the detection of breaking of a fibre web made according to any of the claims from 1 to 23.
26. Combing machine comprising at least one device for the detection of breaking of a fibre web made according to any of the claims from 1 to 23.
27. Roving frame or spinning unit comprising at least one device for the detection of breaking of a fibre web made according to any of the claims from 1 to 23.
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 (en) 2007-09-03 2007-09-03 DEVICE FOR DETECTION OF THE BREAKAGE OF A FIBER RIBBON
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 true EP2183416A1 (en) 2010-05-12
EP2183416B1 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 (en)
CN (1) CN101827963B (en)
BR (1) BRPI0816300B1 (en)
IT (1) ITBS20070131A1 (en)
WO (1) WO2009031090A1 (en)

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Publication number Priority date Publication date Assignee Title
US1589648A (en) * 1923-05-19 1926-06-22 Charles W Hubbard Stop motion
FR1288818A (en) * 1961-02-14 1962-03-30 Alsacienne Constr Meca Textile Machine Drill Bit
CH478264A (en) * 1966-08-09 1969-09-15 Luwa Ag Method for monitoring the roving on wing spinning machines
ES168927Y (en) * 1971-05-14 1972-05-01 Riera Masot DEVICE FOR-MECHAS.
JPS5412571Y2 (en) * 1973-02-28 1979-06-01
US4095062A (en) * 1976-09-03 1978-06-13 Platt Saco Lowell Limited Stop-motion apparatus
CN2043976U (en) * 1988-09-10 1989-09-06 史品山 Infrared digital display auto-controller for end breaking
US5429157A (en) * 1993-09-07 1995-07-04 Plemons; G. Dale Blade type drop wire
CN2405215Y (en) * 2000-02-03 2000-11-08 山西经纬合力机械制造公司总厂 Photoelectric detecting means for combing machine
CN2851299Y (en) * 2005-10-20 2006-12-27 青岛环球集团股份有限公司 Infrared synchronous monitor for broken sliver of drawing frame

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009031090A1 *

Also Published As

Publication number Publication date
CN101827963A (en) 2010-09-08
BRPI0816300A2 (en) 2015-11-24
BRPI0816300B1 (en) 2017-12-12
CN101827963B (en) 2012-02-15
ITBS20070131A1 (en) 2009-03-04
EP2183416B1 (en) 2014-03-26
WO2009031090A1 (en) 2009-03-12

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