EP1540053B1 - Sensor system for a ring spinning machine - Google Patents
Sensor system for a ring spinning machine Download PDFInfo
- Publication number
- EP1540053B1 EP1540053B1 EP03783893.5A EP03783893A EP1540053B1 EP 1540053 B1 EP1540053 B1 EP 1540053B1 EP 03783893 A EP03783893 A EP 03783893A EP 1540053 B1 EP1540053 B1 EP 1540053B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- transmitter
- receiver
- housing
- spinning machine
- 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.)
- Expired - Lifetime
Links
- 238000007378 ring spinning Methods 0.000 title claims description 21
- 238000009987 spinning Methods 0.000 claims description 45
- 230000003287 optical effect Effects 0.000 claims description 12
- 239000004033 plastic Substances 0.000 claims description 6
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Images
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
- D01H1/14—Details
- D01H1/16—Framework; Casings; Coverings ; Removal of heat; Means for generating overpressure of air against infiltration of dust; Ducts for electric cables
-
- 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
- D01H13/1633—Electronic actuators
- D01H13/165—Photo-electric sensing means
Definitions
- the invention relates to a ring spinning machine according to the preamble of claim 1.
- the invention is particularly concerned with the design of components which are intended to enable the realization of the so-called single-spindle sensor.
- Optical sensors are out of the EP-A-480 898 , of the DE-A-2334389 , of the JP 62 78 946 as well as from the US 3,907,440 known
- the JP 62 78 946 describes an optical sensor, which is arranged in a housing made of translucent plastic, for detecting a yarn breakage.
- the US 3,907,440 describes an optical sensor in a housing, wherein lenses are used as light guide elements in the housing.
- the EP-A-480 898 shows in a schematic diagram ( Fig. 1 ) a sensor design which is intended to detect light reflected by the rotor, and two sensor designs ( Fig. 2 or 3), which work by interrupting a light beam by a moving element (eg runners or thread) in a spinning station.
- a moving element eg runners or thread
- the transmitter and receiver heads are the FIG. 1 individually attached to the ring frame. In a ring spinning machine with (today) more than 1000 spinning stations such a procedure is economically excluded.
- FIGS. 4 to 6 of the EP-A-480 898 is an assembly unit for the execution according to FIG. 2 shown in the same font.
- This unit comprises a U-shaped hollow profile, which is to grip the individual sensor heads elastically.
- the heads can be moved along the Profiil to allow the setting of the respective distance from the spinning ring, ie the open profile is not covered and will collect during operation fiber fly and dirt.
- a comparison with the corresponding schematic diagram ( Fig. 2 in EP-A-480 898 But makes immediately clear that the construction after the FIGS. 4 to 6 is not a practicable solution for the realization of this principle is - according to the principle of a light beam on the spinning ring pass by, which due to the dimensions of the elements in the FIGS. 4 to 6 seems impossible.
- the EP-A-480 898 also mentions the DE-A-2334389 as a prior art publication of an optical sensor which may be provided in the form of a light barrier or a reflection head.
- the DE-A-2334389 But not primarily concerned with the sensors, but rather with a speed control for a ring spinning machine.
- An optical sensor is mentioned only as a variant among others and it is already apparent from the schematic diagram ( Fig. 3 ) of such a sensor clear that hardly seriously thought of the realization.
- the claimed solution offers the advantage that the (mutually) geometric relationships of the transmitter and receiver elements of a spinning station predetermined and the final assembly can be facilitated.
- the present invention may be used in combination with the invention EP-A-1052314 and or EP-A-1074645 be used. Certain details of the embodiments in these applications, however, must be adapted for this purpose.
- the ring frame 110 in Fig. 1 has a horizontal support member 113 for a spinning ring 112, further to the inside of the spinning machine towards a support member 111 to which a rail 120 is fixed, which carries a holder 122 and a ring 124 for narrowing the thread balloon.
- each spindle 116 is associated with its cop 118 in a bore 125 of the ring frame 110 depending on a spinning ring 112, a holder 122, and another ring 124.
- a spinning ring 112 is held by a holder 114 on the ring frame 110.
- breakthroughs 126 are present in the support member and provided strips 128, which emanate from the support member 111 below the support member 113.
- the openings 126 allow the discharge of the air flowing along the cops according to arrows 140a, 140b.
- the ring frame after the FIG. 1 is shown merely as an example - the actual construction does not play a significant role in this invention.
- the ring frame 150 in Fig. 2 carries a spinning ring 180, with a runner 190, and ring holder 184.
- the in Fig. 2 shown spinning ring 180 is a so-called "Schrägflanschring" (eg EP-B-528 056 ) educated.
- the invention can also be used with other ring types (eg with the conventional ring cross section after FIG. 1 ) be used.
- a base part 330 is fixed by suitable means (not shown).
- the base part comprises two walls 334, 336 protruding from the ring frame, each wall being provided with an inside bead 338 at the end remote from the ring frame.
- the beads 338 form a snap connection with connecting elements 340, 422 of a holder 344 for a magnetic rotor sensor 346.
- the bracket 344 may be formed of plastic. It also includes a bezel 352 for a signal lamp 348.
- the connecting elements 340, 342 also serve as fastening elements for a signal evaluation unit SA, which is connected by means of conductors 354, 356 to the display 348 and to the sensor 346.
- the bracket 344 therefore also serves as a partial cover for the channel within the socket 330.
- the sensor 346 is preferably designed as a magnetic sensor.
- This design has proven itself technically. However, it has been found that this choice of sensor element has a significant impact on the overall cost and that it is very difficult to offer the end product (1000+ sensors with evaluation electronics, cabling and operator guidance) at a price attractive to the buyer of the ring spinning machine is. Optical sensors can be bought cheaper. As has already been shown in the introduction, there is hitherto no known to the Applicant design with reflection heads as rotor sensors.
- FIG. 3 In the FIG. 3 are parts of four adjacent spindles 116 of a ring spinning machine and a small part of the bearing surface 113 of the ring frame of this machine can be seen.
- the parts 117 are the so-called “separators” which shield as far as possible the environment of a spindle 116 (a "spinning station") from the vicinities of the adjacent spindles 116 ("spinning stations"). Parts of the spinning rings 180 for five spinning positions are also visible in this figure.
- a U-shaped profile 200 is fastened, which like the base part 330 (FIG. Fig. 2 ) forms part of a channel.
- profile 200 is broken away at the left end to show the underlying ring frame.
- the type of attachment is not particularly important because the system to be described is insensitive to minor tolerance errors.
- the attachment of the profile should, however, be carried out such that the upper (free) edge of the profile 200 lies in a plane with the bearing surface 113.
- the profile 200 is open at the top, the channel is therefore closed by cover elements ("sensor carrier") 202 according to the present invention, wherein in the FIG. 3 two cover elements are partially shown.
- Each cover element 202 comprises a cover plate 204, of which one edge strip 206 rests on the bearing surface 113, and two elastic fastening strips 208, 210 which project down into the channel and form a snap connection with the side walls of the profile 200.
- the fastening strip 208 forms the lower part of a wall, which has a stop 207
- the bar 210 forms the lower part of a wall 211, which has a stop 209.
- the stops 207, 209 come into contact with the free edges of the profile 200 and thus define the angular position of the cover plate 204 relative to the support surface 113th
- Each cover plate 204 carries four housings 212, wherein in the FIG. 3 only a housing 212 of the left cover 202 and three housing 212 of the right cover 202 are visible.
- the angular positions of the housing relative to the support surface 113, or relative to the spinning rings n mounted on the support surface, are given by the angular position of the respective cover plate 204.
- the housings 212 are described below with reference to FIGS. 4 to 7 described in more detail, they are all identical, so that the description of one housing applies to all others.
- Each housing 212 includes two side walls 214 and 216 (FIGS. Fig. 4 ) and a roof part 218.
- the housing is designed without bottom, that is, it is completely open to the cavity of the channel.
- the side walls 214, 216 protrude beyond the skirt 206 and are supported in this projecting area (in the "front” of the housing) by a floor 220 (FIG. Fig. 5 ), so that the housing 212 is closed to the outside.
- the "end face” 224 ie the housing wall, which faces a spinning ring 180 associated with this housing, is formed and is made specifically according to the teaching of certain subclaims explained in more detail below. For now, however, the description of the general construction of the housing is completed.
- the "back" of the housing 212 ie the housing wall, which faces the operating lane between two adjacent machines, is formed by a curved wall portion 226, which in the FIG. 4 has been removed to allow the insight into the cavity of the housing.
- the wall 211 is provided with a suspension 228 and two stops 230. Based on these elements, an electronic board 232 according to the FIG. 8 be mounted in a predetermined position relative to the end face 224 of the housing
- the electronic board 232 is similar in the basic concept of the board, which in connection with the EP 1074645 (FIGS. 12 and 13, respectively), ie it comprises a carrier with a computer and conduction path between the computer and other electronic elements of the electronics. Since these elements or lines themselves are not essential to this invention, they have not been shown. However, this board 232 is provided with an opening 234 which can receive the suspension 228 when the board 232 is printed "forward" (toward the face 224). The board 232 should be pressed so far forward that it abuts against the stops 230. The opening 234 and the suspension 228 are constructed such that a certain clamping force arises therebetween when the board 232 is in contact with the stops 230.
- this attachment for the board is by no means essential to the invention.
- the attachment is strong enough to ensure the positioning of the board against vibration (vibration) but still allow the detachment of the board from the housing for the purpose of replacement.
- the attachment of the board could be ensured, for example, that the simple stops 230 are converted into elastic elements which together with the edge portions of the board together form the snap connection.
- the board 232 differs from the boards of the EP-A-107645 in that it is provided with a light emitter element 236 ( Fig. 7 ), a light receiving element 238 ( FIGS. 7 and 8 ) and a light emitting diode LED is equipped as a signal generator for the operation guide. How to get the FIG. 7 can be removed, the transmitter element 236 is received in a designated "pocket” 240 in the front of the housing when the board 232 is in contact with the stops 230, while the receiver element 238 is received in an adjacent "pocket” 242.
- the bags 240, 242 are also in the FIG. 4 visible, noticeable.
- the diode LED is mounted on the other side of the board and faces the wall portion 226.
- Both the transmitter 236 and the receiver 238 have their own (ie a respective "window” 240, 242 associated with this element) (FIG. 4 and FIG. 7 ) is provided in the end face 224.
- These windows 240, 242 are at least selectively "translucent", ie they let through the radiation that should be emitted by the transmitter and collected by the receiver again.
- the term "light” is not limited in this description to the visible electromagnetic vibrations.
- the term here also includes the low-energy radiation, which can also be used in the monitoring of human-operated machines, in particular the areas of the infrared and ultraviolet spectrums which are adjacent to the visible region.
- the transmitter 236 in the embodiment according to the FIGS. 4 to 7 preferably radiates in the infrared range, for example with a wavelength in the order of 850 nm to 950 nm.
- translucent does not necessarily mean absolute transparency here. Some attenuation (absorption) of the radiated energy is allowed, provided the receiver has sufficient sensitivity.
- the material of the window can be chosen such that it produces a filtering effect and therefore selective certain (predetermined by the choice of the transmitter) wavelengths. For example, the material could be chosen to be virtually impermeable to wavelengths outside the infrared range. However, this additional measure is not essential to the invention.
- the wall parts adjacent to the window preferably have a relatively low light transmittance. This applies not only to the side walls 216, 214 and roof part 218, but also to the partition wall 244 between the "pockets", which receive the transmitter 236 and receiver 238. By this measure, a "short circuit" (crosstalk) between the transmitter 236 and the receiver 238 is counteracted.
- the relative permeability of the wall parts need not be accomplished by the choice of material, but may (also) be determined by the wall thickness. Preferably, both measures (selection of the material, and selection of the wall thickness) are used to achieve the required effect.
- the front part of the housing is preferably formed of a single material and conveniently in one piece. The preferred material is a plastic, for example a polycarbonate.
- the windows may have a wall thickness in the range 0.5 to 1.5 mm, while the relatively impermeable wall parts have a much greater thickness.
- the diode LED should radiate visible light, as this element serves as part of the operator guidance.
- the concept of the operator guidance system is already in EP-A-1074645 ( Fig. 8 to 10 ) and the description will not be repeated here.
- Important to this system is a visually detectable signal indicating that an error has occurred at an affected spinning station.
- the housing 212 is also intended to serve as a display means.
- the signal is generated by the illumination of the diode LED.
- the rear wall 226 must therefore be translucent - for visible light.
- the whole rear part the housing 212 to make transparent.
- the alarm or ringing signal issued from a particular spinning station should be detectable by an operator only within a predetermined space around that spinning station - the side walls 214, 216 in the rear of the housing 212 are therefore also substantially radiation-responsive impermeable, emanating from the diode LED.
- the shape of the sidewalls 214, 216, especially in the rear of the housing is selected such that the position of the LED within the housing is such that an operator will not perceive the signal until it enters the predetermined detection field near the spinning station.
- the board 232, the transmitter 236 and the receiver 238 are also in the FIG. 9 shown.
- the housing 212 has been omitted, because it is assumed that the windows 240, 242 behave radiolucent, the partition wall, however, radiopaque.
- the transmitter is provided by the manufacturer, with its own optics, so that this element generates a beam 250 (indicated by dashed lines), which spreads conically, and symmetrically about an axis 251.
- the receiver 238 of course does not produce a beam, but has its associated "Touchpad", which also spreads conically with increasing distance from the receiver and symmetrically about an axis 253 - the conical propagation of this touchpad is in the FIG. 9 indicated by dashed lines with 252. It is first assumed that the axes 251, 253 are mutually parallel with a distance s. The figure does not show the angular position of the axes 251, 253 with respect to the support surface 113 - it is assumed that the axes are parallel to the surface 113.
- a segment of the "surface" of the spinning ring 180 is in the FIG. 9 with F indicated. This segment is located after the FIG. 9 at a distance A from both the transmitter 236 and the receiver 238.
- the axes 251, 253 could be e.g. approach in the direction of the spinning ring and, if necessary, cut at one point on the segment F.
- the distance s should be kept as small as possible without risking the "short circuit" (direct transmission from the transmitter to the receiver).
- the distance A would also have to be kept small.
- the distance A must not be chosen too small by spinning.
- the approach of the housing 212 to the spinning ring 180 could cause a disturbance in the yarn path, further this approach is limited by the need to operate the spinning station.
- a distance A of less than 10 mm is therefore problematic in all cases and is therefore preferably to be avoided.
- this distance is more than 15 mm, it is expedient a distance of 20 mm or more.
- an optimization will fail in many cases because it must be expected that the spinning station conditions will be changed during the lifetime of the sensor system, for example because a conventional spinning ring (112, FIG. Fig. 1 ) by a helical flange ring (190, Fig. 2 ) and / or because a spinning ring of a given diameter is replaced by a spinning ring of a different diameter is replaced.
- the diameter of the spinning ring can be selected in a ring spinning machine for the processing of short staple fibers normally in the range of 35 to 50 mm from the end user.
- the machines that process long staple fibers work with larger ring diameters.
- the radiation-emitting surface of the transmitter 236 should be as close as possible to the window 240 (FIG. Fig. 7 ) without coming into contact with the window 240. There should be no substantial distance between the transmitter 236 and the inner surface T1 (FIG. Fig. 4 ) of the sender bag remain open. It is therefore advantageous to design the surface T1 with a small conicity, so that the transmitter 236 comes into contact with the surface T1 just before it would touch the window. Such a conical course of the surface T1 is shown schematically in FIG FIG. 4 indicated by a dashed circle.
- the light-sensitive surface of the receiver 238 preferably has a slightly greater distance to the overlap area Ü than the distance A of the transmitter 236. This can be ensured by a small distance a (FIG. Fig. 7 ) is left between the light-sensitive surface of the receiver and the window 242. This can also be ensured by the fact that the receiver 238 in contact with a conical surface T2 (indicated schematically by dashed lines, Fig. 4 ) enters the receiving pocket and / or that the receiver 238 with a hood 256 ( Fig. 7 ) which comes into contact with the window 242.
- outer surface refers to the surface located on the outside of the housing 212.
- the “inner surface” lies within the hollow space of the housing 212.
- the curvature of the outer surface may, but need not, be limited to the two lenses (windows) 240, 242 - i. for the transmitter as well as for the receiver - to be the same.
- the housing 212 forms a so-called multifunctional monolithic housing. At least the protective and / or positioning and / or light-bundling functions can be integrated in this monolithic housing, but preferably also the display function, which shows a defective spinning station.
- the display can be designed in such a way that it indicates both a yarn breakage and a spindle which has a wrong speed (eg a creeping spindle, cf. EP-A-1074645 )
- the preferred manufacturing method is to form the plastic cover elements 202 completely in one piece in an injection molding process. This is possible even if the back wall 226 must be formed of a different material than the side walls 214,216 and roof part 218, e.g. to give a certain color of the alarm or call signal. It would, of course, be possible to form individual parts of the cover element separately, each on the basis of an individually optimal method, or of individually optimal (different) materials, and to assemble these parts to produce the element 202.
- the housings 212 could be e.g. be made individually and connected by spacers to form a cover. Such housings could e.g. glued to the spacers.
- FIG. 3A Figure 3 shows schematically in plan another embodiment of the principle of selective delivery of an optical signal for operator assistance.
- the housing 212 it is provided to selectively dispense the optical signal within a limited space in the vicinity of the spinning station. Under certain circumstances, however, it is necessary to emit a signal "wide", wherein the signal generation in the immediate vicinity of the light source is no longer important, because in this space at least one other signal generator is present.
- These requirements apply to the "section lamp”.
- Such a lamp is in the FIG. 3
- This application is not shown, but is in EP-A-1074645 in connection with the FIG. 9 or Figure 13 has been described in the document - see there "lamp SL".
- the concept of the "section” as a unit for the design of the sensor carrier is in EP-A.1052314 been described.
- the section lamp of a given section illuminates when at least one spinning station is within it Section a defect, such as a thread break has.
- the section lamp of the affected section should be clearly visible from the end of the machine, even if the affected section is in the middle of the machine.
- the light output of the source should therefore be utilized as efficiently as possible in the preferred directions.
- One solution to this problem is in the FIG. 3A shown.
- reference numeral 280 refers to the free front wall of the profile 200 - cf. FIG. 3 - With an inner surface IF and outer surface AF.
- the front wall 280 of the profile or profile piece is provided with a continuous, circular hole 281 which receives the button-like body 282.
- a circuit board P with a light-emitting diode 283, which can be excited by means of suitable conductor connections on the board P to light up.
- This diode 283 represents the light source for the respective section lamp.
- the body 282 consists of a disc-shaped head portion 284 and a cylindrical trunk 285.
- the body 282 is preferably formed in one piece, and in the preferred embodiment of a translucent plastic.
- the stem 285 is pushed through the hole 281 until the head portion 284 abuts against the outer surface AF of the wall 280.
- the face 286 of the stem 285 then stands near the diode 283 and conducts virtually all light emanating from the diode into the stem 285.
- the cylindrical outer surface of the stem 285 now acts inwardly as a mirror, so that the light entering via the end surface 286 is transmitted in the longitudinal direction of the stem into the head portion 284.
- the head portion 284 is hollowed out by a cone-shaped excavation 287.
- the base of the excavation 287 lies in the plane of the free-standing surface of the head portion and the apex lies in the plane of the surface which is in contact with the surface AF.
- the cone-shaped surface in turn forms a mirror, which deflects the light emerging from the trunk 286 through approximately 90 °, so that this light is now forwarded approximately parallel to the surface AF.
- the light can pass the body 282 over the cylindrical Leaving surface 289 of the head part and is thus well visible in the longitudinal direction of the machine, but hardly in the longitudinal direction of the trunk 285th
- the invention is not limited to the details of the embodiment according to the FIG. 3A limited.
- the geometry of the body 282 may be adjusted to the light wavelength or refractive index of the material to achieve the desired effects.
- the invention therefore provides in this aspect, a housing part for a visual display.
- This housing part comprises a translucent portion (e.g., stem 285) formed for light transmission in a first direction (e.g., in the longitudinal direction of the elongate portion).
- This direction leads to a reflecting surface (e.g., the cone-shaped surface 287) which can bend the light from the first direction in a second, preferred direction.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Description
Die Erfindung betrifft eine Ringspinnmaschine nach dem Oberbegriff des Anspruchs 1. Die Erfindung befasst sich insbesondere mit der Gestaltung von Komponenten, welche die Realisierung der sogenannten Einzelspindelsensorik ermöglichen sollen.The invention relates to a ring spinning machine according to the preamble of
Ein Überblick über die grundsätzlich bekannten Lösungen für die Sensorik in der Ringspinnmaschine ist aus dem Fachartikel "
Optische Sensoren sind aus der
Die
Die
Die
Gemäß der Beschreibung der
In den
Die
Es ist die Aufgabe dieser Erfindung, Komponenten vorzuschlagen, welche die Verwendung eines sogenannten Reflexionskopfes in der Einzelspindelsensorik einer Ringspinnmaschine ermöglichen.It is the object of this invention to propose components which enable the use of a so-called reflection head in the single-spindle sensor system of a ring spinning machine.
Die Aufgabe ist durch die kennzeichnenden Merkmale des Anspruches 1 gelöst.The object is solved by the characterizing features of
Die beanspruchte Lösung bietet den Vorteil, dass die (gegenseitig) geometrischen Verhältnisse der Sender- und Empfängerelemente einer Spinnstelle vorbestimmt und die Endmontage dadurch erleichtert werden können.The claimed solution offers the advantage that the (mutually) geometric relationships of the transmitter and receiver elements of a spinning station predetermined and the final assembly can be facilitated.
Die vorliegende Erfindung kann in Kombination mit der Erfindung gemäss
Im folgenden werden Ausführungen der Erfindung anhand der Figuren im einzelnen beschrieben. Es zeigen:
- Fig. 1
- einen Querschnitt durch einen Ringrahmen mit den umgebenden Teilen einer Ringspinnmaschine gemäss
DE-A-195 42 802 - Fig. 2
- eine Kopie der Figur 11 aus der
EP-A-1074645 - Fig. 3
- schematisch eine perspektivische Darstellung einer Lösung gemäss der vorliegenden Erfindung, wobei Teile weggebrochen wurden, um die darunter liegenden Teile darstellen zu können;
- Fig. 3a
- eine Modifikation der Anordnung nach
Figur 3 ; - Fig. 4
- ein Detail (ein Gehäuse) aus der
Figur 3 betrachtet in Richtung des Pfeils P (Fig. 3 ), wobei ein Teil vom Gehäuse weggelassen worden ist, um den Hohlraum innerhalb des Gehäuses zu zeigen; - Fig. 5
- das Gehäuse der
Figur 4 von unten betrachtet; - Fig. 6
- das Gehäuse der
Figur 4 bzw. 5 von der Seite betrachtet; - Fig. 7
- im Querschnitt ein Detail aus der
Figur 4 in der Ebene VII-VII; - Fig. 8
- schematisch eine Elektronikplatine in Seitenansicht;
- Fig. 9
- schematisch die Geometrie des optischen Systems;
- Fig. 10
- verschiedene Varianten (
Fig. 10A bis 10D ) einer Linsenoptik für ein Gehäuse nach denFiguren 4 bis 7 .
- Fig. 1
- a cross section through a ring frame with the surrounding parts of a ring spinning machine according
DE-A-195 42 802 - Fig. 2
- a copy of Figure 11 from the
EP-A-1074645 - Fig. 3
- schematically a perspective view of a solution according to the present invention, wherein parts have been broken away to represent the underlying parts can;
- Fig. 3a
- a modification of the arrangement according to
FIG. 3 ; - Fig. 4
- a detail (a housing) from the
FIG. 3 considered in the direction of the arrow P (Fig. 3 a part of which has been omitted from the housing to show the cavity within the housing; - Fig. 5
- the case of the
FIG. 4 viewed from below; - Fig. 6
- the case of the
FIG. 4 or 5 viewed from the side; - Fig. 7
- in cross section a detail from the
FIG. 4 at level VII-VII; - Fig. 8
- schematically an electronic board in side view;
- Fig. 9
- schematically the geometry of the optical system;
- Fig. 10
- different variations (
10A to 10D ) a lens optic for a housing after theFIGS. 4 to 7 ,
Es wird vorerst kurz auf die Konstruktion des Ringrahmens einer Ringspinnmaschine und die Lösung gemäss
Der Ringrahmen 110 in
Der Ringrahmen 150 in
Die Verbindungselemente 340, 342 dienen auch als Befestigungselemente für eine Signalauswertungseinheit SA, die mittels Leiter 354,356 mit der Anzeige 348 und mit dem Sensor 346 verbunden ist. Die Halterung 344 dient deshalb auch als eine Teilabdeckung für den Kanal innerhalb des Sockels 330.The connecting
Gemäss
In der
An der Vorderseite 156 (nur links sichtbar) des Ringrahmens ist ein U-förmiges Profil 200 befestigt, das wie der Sockelteil 330 (
Jedes Abdeckelement 202 umfasst eine Abdeckplatte 204, wovon eine Randleiste 206 auf der Auflagefläche 113 aufliegt, und zwei elastische Befestigungsleisten 208,210 die nach unten in den Kanal hineinragen und mit den Seitenwänden des Profils 200 eine Schnappverbindung bilden. Die Befestigungsleiste 208 bildet die untere Partie einer Wand, welche einen Anschlag 207 aufweist, und die Leiste 210 bildet die untere Partie einer Wand 211, welche einen Anschlag 209 aufweist. Die Anschläge 207, 209 treten in Berührung mit den freien Kanten des Profils 200 und definieren somit die Winkelstellung der Abdeckplatte 204 gegenüber der Auflagefläche 113.Each
Jede Abdeckplatte 204 trägt vier Gehäuse 212, wobei in der
Jedes Gehäuse 212 umfasst zwei Seitenwände 214 bzw. 216 (
Die "Rückseite" des Gehäuses 212, d.h. die Gehäusewand, welche der Bedienungsgasse zwischen zwei benachbarten Maschinen gegenübersteht, ist durch einen gebogenen Wandteil 226 gebildet, der in der
Die Elektronikplatine 232 ist im Grundkonzept der Platine ähnlich, die im Zusammenhang mit der
Die Platine 232 unterscheidet sich von den Platinen der
Es werden verschiedene Lichtsender-/Empfängerelemente am Markt angeboten und sie werden normalerweise mit je einer eigenen Optik zur Bündelung der ausgestrahlten bzw. einfallenden Lichtstrahlungen versehen. Es ist möglich, dass ein Sender-/Empfängerelementenpaar gefunden werden kann, welches ausser Lichtdurchlässigkeit keine speziellen Anforderungen an die Stirnseite 224 stellt. Diese glückliche Konstellation ist aber unwahrscheinlich, wie eine Betrachtung der breiteren Problematik im Zusammen hang mit der vorgesehenen Anwendung in der Ringspinnmaschine zeigen wird. Diese breitere Problematik ist hier nur stichwortartig wiedergegeben:
- Spinnringdurchmesser variabel
- Ringmaterial bzw. -oberflächenbeschaffenheit variabel
- Läufermaterial bzw. -oberflächenbeschaffenheit variabel
- Läuferform bzw. Stellung (Geometrie) gegenüber dem Ring variabel
- Läufergeschwindigkeit variabel
- Minimalabstand zwischen dem Spinnring und dem Gehäuse wichtig (Bedienung der Spinnstelle bzw. - unter Umständen - Störung der Läuferbewegung, falls der Abstand zu klein ist)
- Lichtverhältnisse variabel (Tageslicht/Beleuchtung, Beschattung der Spinnstelle ....)
- Alterung der Komponenten
- Verschmutzung (Ablagerungen, Verflugung ...)
- Spinning ring diameter variable
- Ring material or surface texture variable
- Runner material or surface texture variable
- Runner shape or position (geometry) relative to the ring variable
- Rotor speed variable
- Minimum distance between the spinning ring and the housing important (operation of the spinning station or - under certain circumstances - disturbance of the rotor movement, if the distance is too small)
- Lighting conditions variable (daylight / lighting, shading of the spinning station ....)
- Aging of the components
- Pollution (deposits, flight ...)
Es stellte auch keine wirtschaftliche Lösung dar, das System individuell auf jede einzelne Anwendungsmöglichkeit anzupassen, insbesondere nicht, weil die Anpassungsarbeiten meistens von den Endbenutzern durchgeführt werden müssten, was dem Anbieter einen Marktnachteil eintragen würde.
Es ist deshalb nicht erfindungswesentlich, aber sehr vorteilhaft, in der Stirnseite selbst eine Optik vorzusehen, welche die Flexibilität der Lösung gegenüber unkontrollierbare Änderungen in der Umgebung begünstigt. Die Gestaltung der Stirnseite soll daher als nächster Punkt erläutert werden.Nor was it an economical solution to adapt the system individually to each individual application, in particular not because the customization work would have to be done mostly by the end users, which would put the provider in a market disadvantage.
It is therefore not essential to the invention, but very advantageous to provide in the front page itself an appearance that favors the flexibility of the solution to uncontrollable changes in the environment. The design of the front page should therefore be explained as the next point.
Sowohl für den Sender 236 wie auch für den Empfänger 238 ist ein eigenes (d. h. ein jeweiliges, diesem Element zugeordnetes) "Fenster" 240, 242 (
Gemäss gewisser Definitionen (siehe Dubbel) befasst sich die Lichtmesstechnik mit-"sichtbarer Strahlung im Wellenlängenbereich λ = 380 nm (blau) bis 780 nm (rot)". Der Begriff "Licht" ist aber in dieser Beschreibung nicht auf die sichtbaren elektromagnetischen Schwingungen eingeschränkt. Der Begriff umfasst hier auch die niederenergetischen Strahlungen, die sich ebenfalls in der Überwachung der von Menschen bedienten Maschinen einsetzen lassen, insbesondere die dem sichtbaren Bereich benachbarten Bereiche der Infrarot- und Ultraviolettspektren. Der Sender 236 in der Ausführung gemäss den
Der Begriff "lichtdurchlässig" bedeutet hier aber nicht unbedingt absolute Transparenz. Eine gewisse Dämpfung (Absorption) der ausgestrahlten Energie ist zulässig, sofern der Empfänger eine ausreichende Sensitivität ausweist. Das Material des Fensters kann derart gewählt werden, dass es eine Filterwirkung erzeugt und daher selektiv gewisse (durch die Wahl des Senders vorbestimmte) Wellenlängen durchlässt. Das Material könnte z.B. derart gewählt werden, dass es für Wellenlängen ausserhalb des Infrarotbereiches praktisch undurchlässig ist. Diese zusätzliche Massnahme ist aber nicht erfindungswesentlich.The term "translucent" does not necessarily mean absolute transparency here. Some attenuation (absorption) of the radiated energy is allowed, provided the receiver has sufficient sensitivity. The material of the window can be chosen such that it produces a filtering effect and therefore selective certain (predetermined by the choice of the transmitter) wavelengths. For example, the material could be chosen to be virtually impermeable to wavelengths outside the infrared range. However, this additional measure is not essential to the invention.
Die den Fenster benachbarten Wandteile weisen auf jeden Fall vorzugsweise eine relativ niedrige Lichtdurchlässigkeit auf. Dies gilt nicht nur für die Seitenwände 216, 214 und Dachteil 218, sondern auch für die Trennwand 244 zwischen den "Taschen", weeche den Sender 236 und Empfänger 238 aufnehmen. Durch diese Massnahme wird einem "Kurzschluss" (Crosstalk) zwischen dem Sender 236 und dem Empfänger 238 entgegengewirkt. Die relative Durchlässigkeit der Wandteile muss nicht durch die Auswahl des Materials bewerkstelligt, sondern kann (auch) durch die Wanddicke bestimmt werden. Vorzugsweise werden beide Massnahmen (Auswahl des Materials, sowie Auswahl der Wanddicke) benutzt, um die erforderliche Wirkung zu erzielen. Der Vorderteil vom Gehäuse wird bevorzugt aus einem einzigen Material und zweckmässigerweise in einem Stück gebildet. Das bevorzugte Material ist ein Kunststoff, beispielsweise ein Polycarbonat. Die Fenster können eine Wanddicke im Bereich 0,5 bis 1,5 mm aufweisen, während die relativ undurchlässigen Wandteile eine wesentlich grössere Dicke haben.In any case, the wall parts adjacent to the window preferably have a relatively low light transmittance. This applies not only to the
Die Diode LED soll sichtbares Licht ausstrahlen, da dieses Element als ein Teil der Bedienerführung dient. Das Konzept des Bedienerführungssystems ist schon in
In der Ausführung gemäss der
Anhand der
Ein Segment der "Oberfläche" des Spinnringes 180 ist in der
Beim Betrachten dieses Diagramms könnte man auf den Gedanken kommen, diese Geometrie zu "optimieren". Die Achsen 251, 253 könnten sich z.B. in Richtung Spinnring annähern und allenfalls an einem Punkt auf dem Segment F schneiden. Der Abstand s sollte möglichst klein gehalten werden, ohne den "Kurzschluss" (direkte Übertragung vom Sender an den Empfänger) zu riskieren. Der Abstand A müsste auch klein gehalten werden.Looking at this diagram, one might think of "optimizing" this geometry. The axes 251, 253 could be e.g. approach in the direction of the spinning ring and, if necessary, cut at one point on the segment F. The distance s should be kept as small as possible without risking the "short circuit" (direct transmission from the transmitter to the receiver). The distance A would also have to be kept small.
Diesen Optimierungsversuchen sind aber Grenzen gesetzt. Der Abstand A darf nicht spinntechnisch zu klein gewählt werden. Erstens könnte die Annäherung des Gehäuses 212 zum Spinnring 180 eine Störung im Fadenlauf verursachen, weiter ist diese Annäherung durch die Notwendigkeit, die Spinnstelle bedienen zu können, begrenzt. Ein Abstand A von weniger als 10 mm ist daher in allen Fällen problematisch und ist daher vorzugsweise zu vermeiden. Vorzugsweise beträgt dieser Abstand mehr als 15 mm, zweckmässig ist ein Abstand von 20 mm oder mehr. Mit zunehmendem Abstand A nimmt aber die Bedeutung der Winkelstellung der Achsen 251, 253 gegenüber der Auflagefläche 113 zu. Je grösser der Abstand A gewählt wird, desto genauer muss diese Winkelstellung bestimmt werden, um zu vermeiden, dass der Strahl 250 entweder auf der Fläche 113 vor dem Spinnring fällt oder sich oberhalb vom Spinn ring im Bereich des Fadenballons nutzlos ausbreitet.But there are limits to these optimization attempts. The distance A must not be chosen too small by spinning. First, the approach of the
Eine Optimierung wird aber in vielen Fällen scheitern, weil damit gerechnet werden muss, dass die Spinnstellenverhältnisse während der Lebensdauer der Sensorik geändert werden, z.B. weil ein konventioneller Spinnring (112,
Die strahlungsemittierende Fläche des Senders 236 sollte möglichst nah zum Fenster 240 (
Die lichtsensitive Fläche des Empfängers 238 weist vorzugsweise einen etwas grösseren Abstand zum Überlappungsgebiet Ü auf, als der Abstand A des Senders 236. Dies kann dadurch gewährleistet werden, dass ein kleiner Abstand a (
Um die Lichtausbeute zu erhöhen, kann das Fenster 242 und/oder das Fenster 240 als eine Linse gestaltet werden. Verschiedene Linsen sind möglich, wobei die
- Fig. 10A
- - Aussenfläche konvex; die Innenfläche liegt in einer Ebene (Plano-Konvexe Linse);
- Fig. 10B
- - Aussenfläche konvex, Innenfläche ebenfalls konvex;
- Fig. 10C
- - Aussenfläche konkav, Innenfläche ebenfalls konkav;
- Fig. 10D
- - Aussenfläche konkav, Innenfläche liegt in einer Ebene (Plano-Konkave Linse).
- Fig. 10A
- - outer surface convex; the inner surface lies in one plane (plano-convex lens);
- Fig. 10B
- - convex outer surface, inner surface also convex;
- Fig. 10C
- - concave outer surface, inner surface also concave;
- Fig. 10D
- - The outer surface is concave, the inner surface lies in one plane (Plano-concave lens).
Das Wort "Aussenfläche" bezieht sich auf die Fläche, die sich auf der Aussenseite des Gehäuses 212 befindet. Die "Innenfläche" liegt innerhalb des Holhlraumes vom Gehäuse 212. Die Krümmung der Aussenfläche kann, muss aber nicht, für die beiden Linsen (Fenster) 240, 242 - d.h. für den Sender sowie für den Empfänger - gleich sein.The word "outer surface" refers to the surface located on the outside of the
Diese Beispiele sind nicht als ausschliessliche Auswahl zu verstehen, sondern sie sollten die Breite der möglichen Auswahl illustrieren. Die optimale Form für eine gegebene Anwendung sollte empirisch ermittelt werden. Durch die Ausnutzung dieser Möglichkeit kann der maximal mögliche Abstand A für sonst gegebene Verhältnisse erhöht werden, ohne unter eine Läufer-Erkennungsschwelle der Sensorik zu fallen. Eine weitere Möglichkeit besteht darin, eine Linse in das Gehäuse 212 einzubauen. Dies erforderte aber die Bildung einer Linsenfassung im Gehäuse 212 und die Montagearbeit zum Anbringen der Linse in diese Fassung, was durch das Integrieren der Linse in die Gehäusestruktur selbst vermieden werden kann.These examples should not be taken as an exclusive choice, but should illustrate the breadth of possible choices. The optimal shape for a given application should be determined empirically. By exploiting this possibility, the maximum possible distance A for otherwise given conditions can be increased without falling below a rotor detection threshold of the sensor system. Another option is to install a lens in the
In der bevorzugten Ausführung bildet das Gehäuse 212 ein sogenanntes multifunktional monolithisches Gehäuse. Es können zumindest die Schutz- und/oder Positionierungs- und/oder lichtbündelnden Funktionen in diesem monolithischen Gehäuse integriert werden, vorzugsweise aber auch die Anzeigefunktion, welche eine defekte Spinnstelle zeigt. Die Anzeige kann derart gestaltet werden, dass sie sowohl einen Fadenbruch, wie auch eine Spindel anzeigt, die mit einer falschen Drehzahl (z.B. eine Schleichspindel, vgl.
Das bevorzugte Herstellungsverfahren besteht darin, die Abdeckelemente 202 aus Kunststoff komplett aus einem Stück in einem Spritzgussverfahren zu bilden. Dies ist auch dann möglich, wenn die Rückwand 226 aus einem anderen Material als die Seitenwände 214,216 und Dachteil 218 gebildet werden muss, z.B. um eine bestimmte Farbe des Alarm- bzw. Rufsignals zu ergeben. Es wäre natürlich möglich, einzelne Teile des Abdeckelements separat, je anhand eines individuell optimalen Verfahrens, bzw. aus individuell optimalen (verschiedenen) Materialien, zu bilden, und diese Teile zur Herstellung des Elementes 202 zusammenzufügen. Die Gehäuse 212 könnten z.B. individuell hergestellt werden und durch Zwischenstücke zur Bildung eines Abdeckelementes verbunden werden. Derartige Gehäuse könnten z.B. mit den Zwischenstücken verklebt werden.The preferred manufacturing method is to form the
Gemäss dem in
In der
Der Körper 282 besteht aus einer scheibenförmigen Kopfpartie 284 und einem zylindrischen Stamm 285. Der Körper 282 ist vorzugsweise aus einem Stück gebildet und zwar in der bevorzugten Ausführung aus einem lichtdurchlässigen Kunststoff. Der Stamm 285 wird durch das Loch 281 geschoben, bis die Kopfpartie 284 gegen die Aussenfläche AF der Wand 280 stösst. Die Stirnfläche 286 vom Stamm 285 steht dann in der Nähe der Diode 283 und leitet praktisch alles, von der Diode ausgehendes Licht in den Stamm 285 hinein. Die zylindrische Aussenfläche vom Stamm 285 wirkt nun nach innen als ein Spiegel, so dass das über die Stirnfläche 286 eintretendes Licht in die Längsrichtung des Stamms bis in die Kopfpartie 284 weitergeleitet wird.The
Die Kopfpartie 284 ist durch eine konusförmige Ausgrabung 287 ausgehöhlt. Die Basis der Ausgrabung 287 liegt in der Ebene der freistehenden Fläche der Kopfpartie und die Spitze liegt in der Ebene der Fläche, welche in Berührung mit der Fläche AF steht. Die konusförmige Fläche bildet wiederum ein Spiegel, welcher das aus dem Stamm 286 austretende Licht durch ca. 90° abbiegt, so dass dieses Licht nun ungefähr parallel zur Fläche AF weitergeleitet wird. Das Licht kann den Körper 282 über die zylindrische Fläche 289 der Kopfpartie verlassen und wird damit in die Längsrichtung der Maschine gut sichtbar, dafür aber kaum in der Längsrichtung des Stamms 285.The
Die Erfindung ist nicht auf die Einzelheiten der Ausführung gemäss der
Die Erfindung sieht daher in diesem Aspekt ein Gehäuseteil für eine optische Anzeige vor. Dieser Gehäuseteil umfasst eine lichtdurchlässige Partie (z.B. den Stamm 285), die für die Lichttransmission in eine erste Richtung (z.B. in die Längsrichtung der länglichen Partie) gebildet ist. Diese Richtung führt auf eine Reflexionsfläche (z.B. die konusförmige Fläche 287), welche das Licht aus der ersten Richtung in eine zweite, bevorzugte Richtung biegen kann.The invention therefore provides in this aspect, a housing part for a visual display. This housing part comprises a translucent portion (e.g., stem 285) formed for light transmission in a first direction (e.g., in the longitudinal direction of the elongate portion). This direction leads to a reflecting surface (e.g., the cone-shaped surface 287) which can bend the light from the first direction in a second, preferred direction.
Claims (9)
- Ring spinning machine with a Sensor system per spinning position, which is secured to the ring frame, for scanning the state of a spinning position, wherein the sensor system contains a light beam transmitter (236) and a light beam receiver (238) for the absorption of light which is emitted by the transmitter (236) and reflected by a part (254, Fig. 9) in the spinning position,
characterised in that
the transmitter (236) and the receiver (238) are carried by a common carrier (212), and the carrier (212) is designed as a common housing for both elements, the transmitter and receiver, and several carriers (212) are connected by Intermediate parts (204) to form one installation unit (202), whereas the installation unit (202) is formed from one piece and designed as cover element of a longitudinal carrier part (200), which carrier part (200) is in form of a channel, and the installation unit (202) is located onto the carrier part (200) with fastening means (208, 210), and the housing (212) is designed with at least one, at least selective, light-permeable window (240 and 242 respectively) for the light beam of the transmitter and/or for the light which is to be absorbed by the receiver, and the carrier (212) is provided with securing means (228) for the releasable securing of the transmitter and the receiver respectively, whereas the securing means (228) are arranged in such a way that they hold the transmitter (236) and the receiver (238) respectively in a predetermined position in relation to the window(s) (240 and 242 respectively) allocated to this element. - Ring spinning machine according to Claim 1, characterised in that the housing (212) is designed with in each case one, at least selective, light-permeable window (240, 242) for the light beam of the transmitter and for the light which Is to be absorbed by the receiver.
- Ring spinning machine according to Claim 1 or 2, characterised in that the light-permeable window (240 or 242 respectively), or at least one of the light-permeable windows (240, 242), is designed as an optical lens.
- Ring spinning machine according to Claims 2 and 3, characterised in that both light-permeable windows (240, 242) are designed as individual optical lenses.
- Ring spinning machine according to Claim 1 or 2, characterised In that the carrier (212) is provided with a holding element for at least one optical lens.
- Ring spinning machine according to Claim 1, characterised In that the carrier (212) is formed from plastic.
- Ring spinning machine according to one of the foregoing Claims, characterised in that the carrier (212) is designed to carry a signal generator (LED) for the generation of a visually perceivable signal.
- Ring spinning machine according to one of the foregoing Claims, wherein the carrier contains a securing part (204, 208, 210) and several housing parts (212), which are formed from one piece, whereby each housing part (212) is provided with suitable mountings (T1, T2) for accommodating the transmitter (236) and the receiver (238) respectively.
- Ring spinning machine according to Claim 8, characterised in that each housing part (212) exhibits at least one, at least selectively light-permeable window (240, 242).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH13902002 | 2002-08-13 | ||
CH13902002 | 2002-08-13 | ||
PCT/CH2003/000543 WO2004015179A1 (en) | 2002-08-13 | 2003-08-12 | Sensor system for a ring spinning machine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1540053A1 EP1540053A1 (en) | 2005-06-15 |
EP1540053B1 true EP1540053B1 (en) | 2014-04-30 |
Family
ID=31501646
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03783893.5A Expired - Lifetime EP1540053B1 (en) | 2002-08-13 | 2003-08-12 | Sensor system for a ring spinning machine |
Country Status (6)
Country | Link |
---|---|
US (1) | US20060232778A1 (en) |
EP (1) | EP1540053B1 (en) |
JP (1) | JP2005535794A (en) |
CN (1) | CN1688756B (en) |
AU (1) | AU2003249831A1 (en) |
WO (1) | WO2004015179A1 (en) |
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US20100224112A1 (en) * | 2009-03-05 | 2010-09-09 | Jerome Kahn | Automatic sizing of embroidery |
CN102534896B (en) * | 2012-01-13 | 2014-06-04 | 顾金华 | Yarn twisting broken end detecting method for spinning machine |
JP5796558B2 (en) * | 2012-09-05 | 2015-10-21 | 株式会社豊田自動織機 | Spinning yarn detection device |
CN102995188A (en) * | 2012-11-30 | 2013-03-27 | 宁波瑞能电子科技有限公司 | Broken yarn detection mechanism |
DE102013011921A1 (en) * | 2013-07-17 | 2015-01-22 | Saurer Germany Gmbh & Co. Kg | Ring spinning machine with a sensor for detecting the movement of the ring traveler |
DE102015002528A1 (en) * | 2015-03-02 | 2016-09-08 | Detlef Görgens | Textile machine with trusses made of mineral casting |
JP7287751B2 (en) | 2017-04-11 | 2023-06-06 | 株式会社豊田自動織機 | Illegal doffing detection device for ring spinning machine |
CZ201888A3 (en) | 2018-02-22 | 2019-09-04 | Rieter Cz S.R.O. | Method of controlling an optical element at a workstation of a textile machine, in particular a yarn manufacturing machine and a textile machine |
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-
2003
- 2003-08-12 EP EP03783893.5A patent/EP1540053B1/en not_active Expired - Lifetime
- 2003-08-12 US US10/524,522 patent/US20060232778A1/en not_active Abandoned
- 2003-08-12 WO PCT/CH2003/000543 patent/WO2004015179A1/en active Application Filing
- 2003-08-12 CN CN038241633A patent/CN1688756B/en not_active Expired - Fee Related
- 2003-08-12 AU AU2003249831A patent/AU2003249831A1/en not_active Abandoned
- 2003-08-12 JP JP2004526569A patent/JP2005535794A/en active Pending
Also Published As
Publication number | Publication date |
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WO2004015179A1 (en) | 2004-02-19 |
US20060232778A1 (en) | 2006-10-19 |
CN1688756A (en) | 2005-10-26 |
AU2003249831A1 (en) | 2004-02-25 |
EP1540053A1 (en) | 2005-06-15 |
CN1688756B (en) | 2010-05-12 |
JP2005535794A (en) | 2005-11-24 |
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