EP1098025B1 - Barre de casse-fil - Google Patents

Barre de casse-fil Download PDF

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Publication number
EP1098025B1
EP1098025B1 EP00811040A EP00811040A EP1098025B1 EP 1098025 B1 EP1098025 B1 EP 1098025B1 EP 00811040 A EP00811040 A EP 00811040A EP 00811040 A EP00811040 A EP 00811040A EP 1098025 B1 EP1098025 B1 EP 1098025B1
Authority
EP
European Patent Office
Prior art keywords
thread
embroidery
monitor
thread monitor
drop
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
Application number
EP00811040A
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German (de)
English (en)
Other versions
EP1098025A1 (fr
Inventor
Franz Lässer
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.)
Franz Laesser AG
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Franz Laesser AG
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Filing date
Publication date
Application filed by Franz Laesser AG filed Critical Franz Laesser AG
Publication of EP1098025A1 publication Critical patent/EP1098025A1/fr
Application granted granted Critical
Publication of EP1098025B1 publication Critical patent/EP1098025B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05C—EMBROIDERING; TUFTING
    • D05C11/00—Devices for guiding, feeding, handling, or treating the threads in embroidering machines; Machine needles; Operating or control mechanisms therefor
    • D05C11/08—Thread-tensioning arrangements
    • D05C11/14—Stop motions responsive to thread tension or breakage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material
    • B65H63/024—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials
    • B65H63/028—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/38—Thread sheet, e.g. sheet of parallel yarns or wires

Definitions

  • the invention relates to a thread monitor bar with a plurality of Thread monitors for monitoring the thread tension in a variety of embroidery points a Schifflistickmaschine, with an axis on which according to the number of Embroidery points louvers pivotable about the axis are lined up, and which Lamellae each have an eyelet provided for receiving the thread to be monitored exhibit.
  • These slats set one in a pivoting position which triggers a signal electrical contact or interrupt it.
  • a force e.g. gravity or / and a spring force
  • the Thread monitor bar is provided with spacers, which a selected Secure the minimum distance between the slats. It is also one of them Spacers independent switching device for switching the individual on or off Thread monitor provided.
  • the display of the monitoring shows the Thread monitor displayed, the slat makes contact. If there is no Thread tension drops the lamella and touches the second contact from one side. If the thread tension is too high, the electrically insulated spring arm of the lamella is off the on the other side at the second contact. The lamella is now optionally from Thread pressed against the spring force of the spring arm against the first contact.
  • a thread monitor previously used on ship embroidery machines has a thread monitor hook formed from a piece of wire, which is attached to a electrically conductive rod is pivotally mounted. They are alternating Thread monitor hooks and spacer sleeves lined up on the rod.
  • the Thread monitor hook is a two-armed lever, which has an eyelet on its first arm having. The wire is in one at the end of the arm opposite the eyelet certain radius and about a double the diameter of the winding appropriate length wrapped. The second goes on the other side of the winding Arm away from the winding. The winding serves as a sleeve with which the Thread monitor hook, also called lamella, can be pivoted on the ladder bar.
  • One of the lever arms allows contact between the rod and a second Ladder are made.
  • a thread monitor bar is known, which of the above described is similar.
  • the second arm is isolated at its end and is the thread monitor hook at this end of the second arm with a bolt from the Contact manufacturing position raised.
  • the slats or ticks are by means of Spacer sleeves made of non-conductive material at a selected distance from each other held on the ladder bar. Slats and spacers are alternately on the Lined up rod.
  • thread monitor strips have been developed developed, in which one the switching device and the spacers summarized.
  • EP-A-0 894 886 there is in particular a thread monitor bar known, the thread monitor hook alternately with switch parts on a Are arranged with which switch parts the thread monitor hook - and can be switched off.
  • a spring is connected to the switch part.
  • the thread monitor hook has one position and can be moved in one position Contact position connect two conductors as soon as the spring force together with the Gravity is stronger than the force from the thread tension. This will give a signal triggered which on site on a thread monitor support bar with a light emitting diode is shown.
  • Several embroidery points are grouped together and the It is also displayed per group.
  • a disadvantage of these thread monitor strips is that the slats and the Distance-creating parts in between, i.e. the spacer sleeves or switch parts on which Ladder bar can move in the longitudinal direction of the bar. It therefore happens that individual slats are trapped between the distance-creating parts and consequently do not work reliably. This makes a reliable one impossible Displays the embroidery site that is not working or is not working optimally. But this is all the more more important, the higher the working speed of the embroidery machines become.
  • a thread monitor bar which the check marks sit on a first ladder bar and on a second Conductor rod sits an insulating sleeve that encompasses about half of it.
  • the sleeve can be given away in an on or off position around the ladder bar.
  • the On position of the sleeve is the second conductor bar on the part creating the contact side of the check mark is not isolated, so that the check mark is missing Thread tension can make a contact between the two conductor bars.
  • This position is isolated from the position of the sleeve, so that the hanging tick on the Insulation and not against the conductor bar.
  • the end flanges reach up to the first rod and can be snapped into place in the two positions of the sleeve.
  • the End flanges form axial stops for the tick.
  • this ensures reliable operation of the thread monitor achieved that the spacer in the area of the axis two at a selected distance Limiting arms arranged to each other to limit the freedom of movement a single lamella in the longitudinal direction of the axis, and that a single Slat is arranged between the two limiting arms of the spacer. Because one and the same spacer allows a slat to move limited on both sides, this range of motion is constant and cannot change by displacing the spacers. Thanks to the switching device is independent of the spacers, the switching device does not move to move the spacer.
  • the spacer advantageously has however, a dimension directed in the longitudinal direction of the thread monitor bar corresponds at most to the width of a single embroidery site.
  • Each embroidery spot with one Fitting separate spacers has the advantage that the number of embroidery points is arbitrary and the spacers, e.g. if the spring described below is tired, can be replaced individually. In particular, however, are the tool costs and thus the smaller the part, the lower the manufacturing costs for these spacers.
  • the spacer advantageously lies on a carrier profile, so that a Swiveling of the spacer around the axis is prevented, and is on the spacer a spring pressing the lamella against the signal triggering position is arranged.
  • the Spring ensures a more even and compared to a lamella without spring higher force acting against the thread force on the lamella at the same low Slat moment of inertia.
  • the counteracting force of the Thread monitor hook is advantageously between 2 and 7 grams, preferably between 2.5 and 3.5 grams.
  • the thread monitor bar advantageously has an elongated one Carrier profile on which the axis is arranged with holding parts. This makes possible the prefabrication of the bar and the assembly of the finished thread monitor bar on the Embroidery machine. This is also advantageous for the replacement of a thread monitor bar.
  • the spacer is expediently an integrally produced one Injection molded part. Both advantageously cooperate with the same lamella Limiting arms have a slit-like opening with which they snap over the axis are. Such a part can be manufactured cheaply and precisely and is very simple on the axis to arrange. Thanks to the separation of the switching device and the spacer, that is Place the part on the axis with a snap on the axis to ensure it is sufficiently secure Connection.
  • switching parts advantageously have visible surfaces which, in particular, have the carrier profile together, optically different, depending on whether the switching part in is the on or off position. Thanks to the optical effect, the position of the Switching part can be read quickly. An entire area can be surveyed at a glance and be checked for correct circuit. It is an advantage if the Visible surface in one of the positions stands out clearly against its background.
  • a deflection limitation for the slat is advantageously provided, which ensures that the thread in the eyelet is still one even with high thread tension minimal change in direction of at least 10 ° to 15 °.
  • Limiting the The freedom of movement of the slat with respect to pivoting about the axis is expediently achieved by a rod parallel to the axis.
  • a rod parallel to the axis are advantageous about such a rod to guide the threads to be monitored and the rod is such arranged that the hardly tensioned thread in the eyelet a maximum Change direction by an angle of at least 45 ° to a maximum of 90 ° got to.
  • the rod can regardless of whether it forms a stop for the slat or not be provided for the thread guide. Due to this change of direction, which is significantly larger than conventional thread monitors, is the thread monitor more sensitive to voltage differences. Lower tensions in the thread can be measured as with a conventional thread monitor, in which the Change of direction is only up to about 30 degrees.
  • the thread monitor bar is expediently in different sub-areas subdivides which subareas are each connected to an evaluation device, to quickly determine which of the embroidery sites reports an error.
  • a display device is advantageously arranged at each embroidery site. To monitor the thread tension, one is advantageous for each embroidery site Monitoring electronics arranged, which counts the contact signals of a slat and after a predetermined number of contact signals in an uninterrupted sequence triggers a display of the embroidery site at the embroidery site.
  • Central evaluation electronics are advantageously provided and each one is Embroidery point connected to this evaluation electronics, the Evaluation electronics counts the contact signals assigned to each embroidery location and after a selectable or predefined number of contact signals of an embroidery location in the embroidery machine stops in an uninterrupted sequence.
  • the critical is in operation Number in both the monitoring electronics and the evaluation electronics same, e.g. three. To set the machine, the number at Evaluation electronics increased to the individual embroidery site and their To be able to check the monitoring electronics without the machine constantly shutting down and has to be started again.
  • the central evaluation electronics can also only the error messages for the individual sections of the thread monitor bar assigned to count. This has the rare disadvantage of being central Evaluation electronics though the machine due to a number of each other immediately following error messages, but these from different Embroidery sites come from the same section and therefore no single embroidery site Indicates error.
  • the advantage of this simplified version is that the data is analog can be transmitted using conventional evaluation electronics can be and significantly fewer lines between monitoring electronics and Evaluation electronics are needed as if each embroidery site with the central Evaluation electronics is connected. The number of lines can be limited also by digitizing the error impulses through the monitoring electronics and a data bus transmitting these error pulses can be reached.
  • the data is transmitted digitally, it is advantageous to use a Provide a code identifying the embroidery site.
  • the Error message supplemented with a code that identifies the type of error. Because namely with the monitoring electronics during the specific monitoring time, i.e. within a time window in a cycle, constantly absent signal is detected is the expression that no error has occurred in this cycle.
  • a constant The present signal means no thread tension in the front thread, so usually Thread break in the needle thread. Occur in the time window a predetermined number of signals , between which the signal is absent, this indicates a lack of thread tension in the Hind thread, usually as a result of thread breakage in the boat thread.
  • a single digital monitoring electronics can be provided for embroidery sites.
  • the evaluation electronics can also in the Monitoring electronics to be integrated at the embroidery site.
  • the slats point each have an eyelet provided for receiving the thread to be monitored.
  • In a signal triggering swivel position of a slat is an electrical by the slat Contact established or interrupted.
  • the Thread monitor bar is equipped with spacers, which have a selected distance secure between the slats, one independent of the spacers Switching device for individual switching on or off of the thread monitor is provided.
  • a thread monitor bar is advantageous for each lamella Spacers independent switching part on the thread monitor bar, in particular on the axis supporting beam profile, articulated.
  • the pivoting movement of the switching part causes a striking, different optical effect on the switching part arranged visible area.
  • the switching part interacts with the lamella and is by hand in an on position that allows the slat to move freely and an off position keeping the slat away from the signal triggering position pivotable.
  • the visible surface of the switching part acts in these two positions differently. Due to the independence of the switching part and spacer the latter is not moved by the actuation of the switch part and not along the axis postponed.
  • a deflection limit for the slat is advantageously provided, which ensures that the thread in the eyelet has a minimal change of direction from 10 to 15 ° is subject, or there is a rod parallel to the axis, over which the to be monitored Threads are arranged in such a way that the thread in the eyelet one Change of direction is subject to a maximum angle of at least 45 to 90 °.
  • each slat is assigned a switching part, which switching part with the Slat cooperates and in a full freedom of movement of the slat On position and an off position that keeps the slat away from the signal-triggering position can be brought, and that the switching part a visible surface of a selected Widths and a length corresponding approximately to the width of the embroidery site, which visible surface either in the on or off position of the switching part on one selected, visible point approximately perpendicular to one when monitoring the Thread monitor usual viewing direction is arranged and in terms of color and / or the brightness of the surface is in contrast to its background, especially to the carrier profile, and in the other position of the switching part of the visible point is shifted and / or with respect to the viewing direction in one stands at a significantly different angle.
  • a method for monitoring the thread tension in a variety of Embroidery points of a Schiffli embroidery machine in which the with a thread monitor Distinguished presence and absence of thread tension in the needle thread and Depending on the thread tension, an electrical contact or error signal is emitted is assigned to the embroidery site
  • Monitoring electronics monitor the error signals of this embroidery site and from the Monitoring electronics detected errors with an indication of the faulty indicates the working embroidery location is characterized in that the monitoring electronics the error signals of her assigned embroidery site counts and after a certain or selectable number of Error signals in an uninterrupted row the incorrect work of the embroidery site indicates.
  • individual, random error pulses are not displayed, but only the repetitive error.
  • the error signals are also advantageous to a central one Evaluation electronics supplied, and if necessary displayed centrally.
  • the central one Evaluation electronics can thus react to the errors that occur.
  • the central evaluation electronics counts the error signals to the error location, i.e. preferably assigned to the embroidery site or a group of embroidery sites and stops the running of the embroidery machine after a selectable number of in one uninterrupted series of error signals assigned in this way.
  • the error signals in the monitoring electronics are advantageous digitized, provided with an embroidery point address and sent to the evaluation electronics directed. But it can also work with analog electronics.
  • the Embroidery location address enables the error signals to be counted based on the error location and can be fed to the evaluation electronics with a data bus.
  • the information transfer is advantageous on both sides, so that the Monitoring electronics can receive commands from the evaluation electronics. Thereby can the monitoring electronics at the command of the central evaluation electronics Embroidery point by opening a valve, which moves a shift rod, too switch off.
  • the monitoring electronics expediently monitors the Error signals from a thread monitor only during a predetermined period of time within the machine cycle, a so-called time window.
  • a time window a time window of the monitoring electronics at least two different error signals distinguished, namely in particular a constant in the predetermined period and an interrupted error signal.
  • These error signals are expediently from the monitoring electronics for forwarding with different codes characterized so that at least one rear thread break from a front thread break can be distinguished.
  • Figures 1 to 3 show a first embodiment of a Thread monitor strip.
  • the carrier profile 11 that can be attached to the embroidery machine is made of Made of aluminum and has a front, perpendicular to an average Viewing direction aligned, angled visible side 13. Behind Profile designs 15 ', 17', 19 'and 21' designed to snap or insert described below with the reference numbers of the profile formations corresponding reference numerals parts, namely holding parts 15, switching part 17, board 19 and cover 21.
  • the holding part 15 is made of plastic and has two feet 23 for Entry into the rail 17 ', a nose 25 for simultaneous entry into the groove 17' and a washer to be aligned when retracting perpendicular to the direction of the last the holding disc 27 is a snap opening 29 'for receiving the axis 29 and one second snap opening 31 'formed for receiving the rod 31.
  • a first jack 19 " on the holding part 15 is used to snap the board 19.
  • the axis 29 serves to receive the lamellae 33 a sleeve 35 is formed by means of a winding of the lamellar wire.
  • a sleeve 35 is formed by means of a winding of the lamellar wire.
  • the cages 43 for the bushings 35 can also be plugged onto the axle Slats 33.
  • the cages 43 have two limiting arms 45, which have a web 47 are connected and have spacer bolts 49 in the extension of the web.
  • the Limiting arms 45 can be plugged onto the axis 29 with recesses 48.
  • the jetty 47 is used to bridge the distance between the bush 35 allowed Limiting arms 45.
  • the spacer bolts 49 ensure a minimum distance between the limiting arms 45 in the area between two lamellae 33 the limiting arm is designed as a spring 50 (see also FIG. 3). This works with the Contact arm 41 of the slat 33 together and presses it against the following described second conductors 61 or 77.
  • the switching parts 17 which are independent of the cages 43 are L-shaped in cross section, two-dimensional structures with one which can be snapped into the groove 17 'on one longitudinal edge Tube 51 formed.
  • the tube 51 has a length which is approximately that Corresponds to the embroidery site width, so that for each embroidery site a separate switching part 17 is inserted into the Groove 17 'can be inserted.
  • the L-shaped bent surface 53 is somewhat shorter than the tube 51 is formed.
  • the opening 31 'in the holding part 15 has a further and a narrower one Area on.
  • the rod 31 can in the longitudinal direction in the wider area of the Openings 31 'are inserted and by snapping into the narrow area of the Opening 31 'are clamped therein.
  • This rod 31 serves as a thread guide and Swing limit for the lamella 33.
  • the thread 65 then runs first from the Thread roller (not shown) coming through the eyelet 39, over the rod 31 and on over the cover 21 to the needle (not shown).
  • a plate 19 is arranged behind the lamellae 33 in the direction of thread travel.
  • the circuit board carries monitoring electronics 55 (FIG. 3) for each embroidery site via plug contacts 57 with a power supply and a central Evaluation electronics 71 is connected.
  • At the monitoring electronics 55 is with everyone Embroidery point a display LEDs 59 connected.
  • On the board 19 is also at each embroidery point S1 ... S8 attached a contact head 61, which on the one hand Forms contact surface against which the contact arm 41 of the lamella 33 can strike, and on the other hand, is connected to the monitoring electronics 55.
  • the board 19 is with a cover 21, which has openings 63. These openings 63 sit when the thread monitor bar is assembled above the light emitting diodes 59.
  • the thread monitor bar is assembled. It's for the purpose Clarity not all parts with reference numbers.
  • a lamella 33 sits on the axis 29.
  • the bush 35 of the lamella 33 sits on the axis 29 between the limiting arms 45 of a cage 43.
  • One arm 37 of the lamella 33 with the eyelet 39 is bent and extends an angle descriptive over the switching part 17 and the visible side 13 of the carrier profile 11 in the thread running direction in front of the carrier profile 11.
  • the second arm or contact arm 41 is against the contact head by the spring 50 61 pressed.
  • a threaded thread 65 runs through the eyelet 39, over the rod 31 to Needle.
  • the contact arm 41 is now from the contact head 61 away. Only if the thread tension is too low, e.g. if the thread breaks, too much Rear thread, oversized front thread 65 etc. is a contact between the axis 29 and the contact head 61 produced and an electrical signal generated in this However, signal is only used by the monitoring electronics when it is in certain time windows occurs. If the front thread is loose outside of this time window, so the contact caused by this does not give any indication of insufficient tension in the Front thread 65.
  • the monitoring electronics 55 therefore only counts those in FIGS Time windows occurring signals. Three signals occur in a continuous series of consecutive time slots in which no signals should appear, shows the Monitoring electronics the embroidery point (e.g. S8) with an illuminated LED (59).
  • the signals not only reach the monitoring electronics 55 of the respective embroidery site S1 to S8, but also via connecting lines 69 in the central evaluation electronics 71.
  • This counts the signals assigned to the sections and switches off the machine if e.g. three signals in one continuous row occur.
  • the embroidery machine will be selectable number of signals in a sequence and usually the corresponding embroidery site is displayed.
  • the evaluation electronics 71 shows on one Display 73 also shows the area in which the faulty embroidery site is located.
  • Monitoring electronics 55 are checked. To check the Monitoring electronics is a slat 33 by hand against the Thread tension blocked, so that three signals in one sequence from the monitoring electronics be counted. This causes the display LED 59 to light up, without stopping the machine.
  • the function of the switching part 17 can also be clearly seen from FIG turning the switching part 17 in the groove 17 'first reaches the corner 75 of the L-shaped one Body, then the entire visible surface 53 into the pivoting range of the lamella 33. As a result, the lamella is pivoted and the contact arm 41 is removed from the contact head 61 moved away. A slat switched off in this way can therefore no longer trigger signals.
  • the thread monitor is switched off in this way, the visible surface 53 of the Contact body 17 from an area directly in front of the visible surface 13 of the carrier bar 11 in an area in front of the cages 43 made of the same plastic material. Optical therefore, the absence of the contrasting to the visible surface 13 of the support bar 11 falls Visible surface 53 of the switching part 17 immediately.
  • every third needle is not used and therefore switched off Pattern, which form the visible surfaces 53 and 13, the correctness of the Thread monitor switching can be surveyed immediately.
  • FIG 4 shows a simplified embodiment of the Thread monitor bar, in which only one contact rail 77 instead of the board 19th is inserted. Otherwise, the parts and their function are identical, which is why only the most important with reference numbers according to the first embodiment are designated.
  • the contact rail 77 is so much in the middle area Bent lamella that its surface in the contact area with the contact arm 41 in an equal distance from the axis 29 or from the board holder 19 ', 19 " defined level, as the contact head 61 in the circuit board 19 does. This deformation the contact rail 77 gives it great rigidity.
  • FIG. 5 the same exemplary embodiment clearly shows that the Slats 33 each between the two limiting arms 45 of the cages 43 on the Axis 29 sit.
  • the cages 43 have a web 47 with a flat outer surface, which in the cage 43 inserted into the bar in flat contact on a surface Carrier profile 11 is present.
  • the two adjoining surfaces are directed in this way and positioned to obstruct rotation of the cage about axis 29 or is impossible, so that the spring force and the vibrating slats in operation Cage 43 are unable to twist.
  • the slats 33 are first threaded onto the axis 29 and the holding parts 15 and switching part 17 into the carrier strip 11 snapped. Then the axis 29 is snapped into the holding parts 15. Now they can Cages 43 around the sleeves 35 from above parallel to the contact surface on the web 47 clicked onto the axis 29 and then the rod 31 snapped into the holding parts 15 become. Finally, depending on the embodiment, a contact rail 77 or a Board 19 and a cover 21 suspended in the carrier profile 11 and the holding parts 15 become.
  • the same support rail 11 with identically designed and arranged Slats 33, cages 43, holding parts 15, axis 29 and rod 31 can also be used for a third Design variants according to Figures 6 to 8 can be used.
  • This third The exemplary embodiment has electronics arranged on a circuit board 79 for Monitoring the thread tension and switching the entire embroidery site.
  • board 79 is placed parallel to the thread running direction.
  • Below the Board 79 are those for controlling the embroidery site and monitoring the Thread monitor necessary circuits arranged (not shown), above is at each embroidery site a switch 81 for switching the embroidery site on and off and one LED 59 to indicate when the embroidery site is working incorrectly.
  • the Contact heads 61 are formed by commercially available screws with nuts. You can therefore easy to replace when they are worn out.
  • Control lines go to the valves at each embroidery point from the circuits a pneumatic system with which a shift rod is moved.
  • a shift rod As a result, the needles, drills, and large thread guides become from your drive elements suspended and thereby shut down.
  • Thread monitor switched off.
  • the thread monitor has in this embodiment therefore the switching parts 17 which can be pivoted by hand are not open.
  • the slat arm 37 is by a shift lever, not shown, which by the mentioned Shift rod is moved, automatically raised or lowered.
  • This shift lever can also be designed such that visible surfaces on the shift levers together form an optical pattern, which the switch positions of the thread monitor immediately reveals.
  • shoes 83 are provided, on which the carrier rail can be placed and to which the circuit board 79 can be fastened.
  • the shoes 83 encompass the carrier rail 11 and clamp them in a groove in the shoe.
  • the clamping screw 85 for Clamping the groove is through an opening 87 in the board accessible. This enables the carrier rail 11 to be replaced with all of them Thread monitors without dismantling the board 79 or individual parts of the Thread monitor strip.
  • FIG. 9 A basic illustration of the monitoring electronics is shown in FIG. 9 shown.
  • the signal given by switch 41 is on two lines 89 and 91 split.
  • One line 89 leads to the evaluation electronics 71
  • Evaluation electronics can be conventional electronics for thread monitors, such as they e.g. is available from the company Alge under the name ARGUS thread monitor. This displays the errors machine section by section on a screen 73.
  • Of the Evaluation electronics is taken over line 97 of the work cycle, which the Defines the time window in which the signals must be recorded.
  • the Monitoring electronics are e.g. three shift registers 99, 101, 103 connected in series intended.
  • a thread monitor bar accordingly has e.g. in a Carrier strip 11 holding parts 15, on which an axis 29 and a rod 31 is attached. Slats 33 and cages 43 are lined up on the axis 29. Each cage 43 closes the Bushing 35 of a lamella 33 on both sides with a limiting arm 45. On the cage 43 is a spring element 50 is arranged which de lamella 33 against the thread tension Contact position presses. Spacer bolts 49 determine the distance between the Limiting arms 45 of adjacent cages 43.
  • a switching device for switching on and off Switching off the thread monitor is independent of the cages 43 pivotable switching part 17 is provided.
  • the switching parts 17 form in an advantageous Design with a visible surface 53 a pattern against the background of the visible surface 13 on the support bar 11.
  • the switching position of the optical pattern Thread monitor can be checked quickly.
  • a thread guide is created with a rod 31, by which the sensitivity of the slats 33 increases and a Deflection limit for the slats 33 is reached.
  • Thread tension error cause contacts between the lamellae and a contact element, which on Electronics is connected.
  • An evaluation electronics counts the triggered thereby Signals and provides the machine after a definable number of signals in one continuously row.
  • a monitoring electronics shows the malfunctioning Embroidery site after a similar series of errors with a lighting diode 59 on.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Quality & Reliability (AREA)
  • Sewing Machines And Sewing (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Coating With Molten Metal (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Claims (16)

  1. Rampe de casse-fil munie d'une pluralité de casse-fil destinés à contrôler la tension du fil dans une pluralité de zones de broderie (S1, S2 ... S8) d'une machine à broder Cornély, comprenant un axe (29), sur lequel sont montées des lamelles (33), dont le nombre est fonction du nombre de zones de broderie et qui peuvent pivoter autour de l'axe,
    a) lesquelles lamelles (33)
    comportent chacune un oeillet (39) destiné à recevoir le fil (65) à contrôler,
    établissent ou interrompent un contact électrique dans une position de pivotement déclenchant un signal,
    et peuvent être retirées de leur position déclenchant le signal par la tension du fil (65) à contrôler,
    b) comprenant des écarteurs (43) destinés à maintenir une distance choisie entre les lamelles (33),
    c) un élément de commutation (17), indépendant des écarteurs (43), étant prévu pour connecter ou déconnecter séparément les casse-fil,
    caractérisée en ce que
    d) l'écarteur (43), dans la zone de l'axe (29), est muni de deux bras de délimitation (45), disposés à une distance choisie l'un de l'autre et destinés à délimiter la liberté de mouvement d'une seule lamelle (33) dans le sens longitudinal de l'axe (29), et
    e) en ce qu'une seule lamelle (33) est disposée entre les deux bras de délimitation (45) de l'écarteur (43).
  2. Rampe de casse-fil selon la revendication 1, caractérisée en ce que les écarteurs (43), considérés dans le sens longitudinal de la rampe de casse-fil, ont une dimension qui correspond, au maximum, pratiquement à la largeur d'une seule zone de broderie (S1, S2 ... S8).
  3. Rampe de casse-fil selon la revendication 1 ou 2, caractérisée en ce que la rampe de casse-fil comporte un profilé de support (11) allongé, sur lequel est agencé l'axe (29) avec des éléments de support (15).
  4. Rampe de casse-fil selon la revendication 3, caractérisée en ce que l'écarteur (43) est en appui contre le profilé de support (11) pour empêcher un pivotement de l'écarteur autour de l'axe, et un ressort (50), qui pousse la lamelle (33) vers la position déclenchant le signal, est agencé sur l'écarteur.
  5. Rampe de casse-fil selon l'une quelconque des revendications 1 à 4, caractérisée en ce que l'écarteur (43) est une pièce moulée par injection en une seule partie.
  6. Rampe de casse-fil selon l'une quelconque des revendications 1 à 5, caractérisée en ce qu'au moins l'un des deux bras de délimitation (45), coopérant avec les mêmes lamelles (33), comporte un orifice (48) en forme de fente, par lequel il est encliqueté sur l'axe (29).
  7. Rampe de casse-fil selon l'une quelconque des revendications 1 à 6, caractérisée en ce que, sur la rampe de casse-fil, en particulier sur le profilé de support (11), sont articulés des éléments de commutation (17), qui coopèrent avec les lamelles (33) et qui peuvent être amenés dans une position de connexion débloquant les lamelles (33) et dans une position de déconnexion par laquelle les lamelles (33) sont maintenues écartées de la position déclenchant le signal.
  8. Rampe de casse-fil selon la revendication 7, caractérisée en ce que les éléments de commutation (17) ont des faces visibles qui, en particulier conjointement avec le profilé de support (11), ont des aspects différents selon que l'élément de commutation (17) est en position de connexion ou en position de déconnexion.
  9. Rampe de casse-fil selon l'une quelconque des revendications 1 à 8, caractérisée en ce qu'il est prévu une butée de débattement pour les lamelles (33), qui garantit que le fil (65) subit dans l'oeillet (39) une variation de direction d'au moins 10° à 15°.
  10. Rampe de casse-fil selon l'une quelconque des revendications 1 à 9, caractérisée en ce qu'une barre est disposée perpendiculairement à la direction du fil, de telle sorte que le fil guidé au-dessus de cette barre subit dans l'oeillet une variation de direction selon un angle maximum de 45 à 90° au moins.
  11. Rampe de casse-fil selon l'une quelconque des revendications 1 à 10, caractérisée en ce qu'un voyant de contrôle (59) est disposé dans chaque zone de broderie (S1, S2 ... S8) et en ce qu'un composant électronique de contrôle (55) est associé à chaque zone de broderie (S1, S2 ... S8), lequel, après un nombre prédéfini de signaux de contact émis successivement sans interruption, actionne dans la zone de broderie un voyant de contrôle de la zone de broderie (S1, S2 ... S8).
  12. Procédé de contrôle de la tension du fil dans une pluralité de zones de broderie (S1, S2 ... S8) d'une machine à broder Cornély, dans lequel un casse-fil détecte la présence ou l'absence de tension du fil (65) et, en fonction de la présence ou de l'absence de tension du fil, un signal de contact électrique est émis et un composant électronique de contrôle (55), associé à la zone de broderie (S1, S2 ... S8), surveille les signaux de contact de cette zone de broderie (S1, S2 ... S8) et chaque erreur détectée par le composant électronique de contrôle (55) est signalée par un voyant de contrôle (59) dans la zone de broderie (S1, S2 ... S8) fonctionnant de manière incorrecte, caractérisé en ce que le composant électronique de contrôle (55) compte les signaux de contact d'une zone de broderie (S1, S2 ... S8) qui lui est associée et, après un nombre défini ou sélectionnable de signaux de contact émis successivement sans interruption, signale la zone de broderie (S1, S2 ... S8) fonctionnant incorrectement.
  13. Procédé selon la revendication 12, caractérisé en ce que les signaux de contact sont, en plus, acheminés vers un composant électronique d'analyse (71) centralisé et sont éventuellement signalés de manière centralisée.
  14. Procédé selon la revendication 13, caractérisé en ce que le composant électronique d'analyse (71) central compte les signaux de contact associés à une zone d'erreur, à savoir de préférence la zone de broderie (S1, S2 ... S8), ou un groupe de zones de broderie (S1, S2 ... S8) et, après un nombre sélectionnable de signaux de contact émis successivement sans interruption et ainsi comptés, interrompt le fonctionnement de la machine à broder.
  15. Procédé selon la revendication 13 ou 14, caractérisé en ce que les signaux de contact sont numérisés dans le composant électronique de contrôle (55), sont munis d'une adresse de zone de broderie et sont acheminés vers le composant électronique d'analyse (71).
  16. Procédé selon l'une quelconque des revendications 13 à 15, caractérisé en ce que le composant électronique de contrôle (55) capte des instructions émises par le composant électronique d'analyse (71) et, en fonction de l'instruction du composant électronique d'analyse (71), active ou désactive la zone de broderie (S1, S2 ... S8).
EP00811040A 1999-11-05 2000-11-06 Barre de casse-fil Expired - Lifetime EP1098025B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH203299 1999-11-05
CH203299 1999-11-05

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EP1098025A1 EP1098025A1 (fr) 2001-05-09
EP1098025B1 true EP1098025B1 (fr) 2003-07-09

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AT (1) ATE244785T1 (fr)
DE (1) DE50002819D1 (fr)

Cited By (1)

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CN108016935A (zh) * 2017-11-27 2018-05-11 海宁市盛祥线业有限公司 一种纱线收卷装置

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CN103487841B (zh) * 2013-09-04 2016-06-29 成都瑞克西自动化技术有限公司 结头断带感应装置
CH708828A1 (de) * 2013-11-08 2015-05-15 Lässer Ag Vorrichtung zur Überwachung des Schifflifadens auf einer Gross- oder Klein-Schifflistickmaschine.
ES2524841B1 (es) * 2014-07-25 2015-07-06 M. Prat S.C.P. Dispositivo detector, tensor y guiador de filamento
DE102015011682A1 (de) * 2015-09-05 2017-03-09 Saurer Ag Schiffchenstickmaschine mit verbesserter Erkennung des Schiffchenfadenbruchs

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CH597080A5 (en) * 1975-10-01 1978-03-31 Saurer Ag Adolph Contactor for electric or electronic thread monitor
GB2046317A (en) * 1979-04-10 1980-11-12 Spencer Wright Ind Inc Yarn detectors
CH646476A5 (en) * 1980-06-27 1984-11-30 Schmid Arthur Ag Thread-monitoring device
CH658477A5 (de) * 1983-03-21 1986-11-14 Saurer Ag Adolph Nadelfadenwaechter fuer stickmaschinen.
SE517299C2 (sv) * 1995-10-06 2002-05-21 Eltex Sweden Ab Anordning för generering av en elektrisk signal i motsvarighet till anspänning och/eller rörelse av en tråd.
EP0894886A1 (fr) * 1997-07-31 1999-02-03 Franz Lässer AG Procédé de surveillance de la tension du fil, détecteur de casse-fil et barre de casse-fil

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108016935A (zh) * 2017-11-27 2018-05-11 海宁市盛祥线业有限公司 一种纱线收卷装置
CN108928673A (zh) * 2017-11-27 2018-12-04 海宁市盛祥线业有限公司 一种改进的纱线收卷装置
CN108016935B (zh) * 2017-11-27 2019-11-12 桐乡市云雀纺织有限公司 一种纱线收卷装置
CN108928673B (zh) * 2017-11-27 2019-11-15 桐乡市云雀纺织有限公司 一种改进的纱线收卷装置

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DE50002819D1 (de) 2003-08-14
EP1098025A1 (fr) 2001-05-09
ATE244785T1 (de) 2003-07-15

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