EP0658507A1 - Procédé pour détecter une réserve de fil dans un dispositif pour emmagasiner et délivrer le fil, et dispositif pour emmagasiner et délivrer le fil - Google Patents

Procédé pour détecter une réserve de fil dans un dispositif pour emmagasiner et délivrer le fil, et dispositif pour emmagasiner et délivrer le fil Download PDF

Info

Publication number
EP0658507A1
EP0658507A1 EP94117383A EP94117383A EP0658507A1 EP 0658507 A1 EP0658507 A1 EP 0658507A1 EP 94117383 A EP94117383 A EP 94117383A EP 94117383 A EP94117383 A EP 94117383A EP 0658507 A1 EP0658507 A1 EP 0658507A1
Authority
EP
European Patent Office
Prior art keywords
storage
thread
scanning
sensors
delivery device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP94117383A
Other languages
German (de)
English (en)
Other versions
EP0658507B1 (fr
Inventor
Rolf Huss
Lars Helge Gottfrid Tholander
Kurt Arne Gunnar Jacobsson
Friedrich Weber
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.)
Memminger IRO GmbH
Iro AB
Original Assignee
Memminger IRO GmbH
Iro AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Memminger IRO GmbH, Iro AB filed Critical Memminger IRO GmbH
Publication of EP0658507A1 publication Critical patent/EP0658507A1/fr
Application granted granted Critical
Publication of EP0658507B1 publication Critical patent/EP0658507B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H51/00—Forwarding filamentary material
    • B65H51/20—Devices for temporarily storing filamentary material during forwarding, e.g. for buffer storage
    • B65H51/22—Reels or cages, e.g. cylindrical, with storing and forwarding surfaces provided by rollers or bars
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/48—Thread-feeding devices
    • D04B15/482—Thread-feeding devices comprising a rotatable or stationary intermediate storage drum from which the thread is axially and intermittently pulled off; Devices which can be switched between positive feed and intermittent feed
    • D04B15/486—Monitoring reserve quantity
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/36—Measuring and cutting the weft
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/36—Measuring and cutting the weft
    • D03D47/361—Drum-type weft feeding devices
    • D03D47/367—Monitoring yarn quantity on the drum
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/48—Thread-feeding devices
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • D04B35/10—Indicating, warning, or safety devices, e.g. stop motions
    • D04B35/12—Indicating, warning, or safety devices, e.g. stop motions responsive to thread consumption

Definitions

  • the invention relates to a method according to the preamble of claim 1 and a thread storage and delivery device according to the preamble of claim 5.
  • a thread storage and delivery device for knitting machines known from US-A-4 180 215 has a rotationally drivable storage body with a concavely drawn outline.
  • the storage body has a translucent wall and different peripheral sections, for example longitudinal grooves or longitudinal slots, in order to define small contact surfaces for the thread turns.
  • a light-generating transmitter and a reflection light receiver are arranged in the interior of the storage body. Outside the storage area there is a mirror which reflects the light from the transmitter in the scanning zone to the receiver as long as there are no thread turns in the scanning zone. The transition between reflection and shadowing taking place in the axial direction is detected in order to control the rotary drive of the storage body. The reflection or absorption behavior of the thread turns influences the discrimination of the sensor signals.
  • the invention has for its object to provide a simple and universally applicable to different types of thread storage and delivery devices method and a structurally simple thread storage and delivery device, with which the scanning of the movements of the limit of the thread supply are insensitive to interference and largely independent of the Thread quality or the properties of the thread material is possible.
  • Either the respective control signal is derived in the method from the appearance or disappearance of the simultaneous unequal storage area signals, or control signals are derived from the discrimination between the simultaneous unequal storage area signals and the thread signals which are identical to one another, in each case the very clear difference between the Equality and inequality is evaluated.
  • a control signal can be reliably derived even in the case of thread signals which resemble one of the unequal simultaneous memory area signals.
  • the quality of the scanning result is high, because scanning is not only "axial", but also in the circumferential direction. A disruptive influence of the thread quality is eliminated.
  • the method can be used with rotatable storage bodies (during rotation and at a standstill) and with stationary storage bodies, and is equally advantageous for thread storage and delivery devices for weaving and knitting machines.
  • the sensors precisely determine whether the limit of the thread supply has reached the scanning zone or not.
  • This statement is very reliable and not susceptible to interference and is independent of the thread quality being processed, because thread windings in the scanning zone can never cause unequal signals at the same time.
  • Sampling properties of the two storage area circumferential sections that differ significantly from thread turns can be structurally easily predetermined, for example by constructive measures on the storage area, by different materials, through different distances from the sensors, through auxiliary elements that are structurally integrated in the storage area, through coloring, orders, refinements and the like. It is important here that the sensors scan across and not only point by point.
  • the scanning takes place opto-electronically and without contact. This ensures optimally gentle treatment of even sensitive thread material.
  • a window signal relating to at least one circumferential point or a circumferential region is derived from the rotational movement in a rotationally drivable storage body. It is scanned stroboscopically, so that critical transition regions between the circumferential sections are possibly disregarded with regard to the scanning or evaluation. In order to achieve a scanning result even when the memory body is shut down, the memory body should always be stopped in such a way that a window signal is present in each case.
  • the window signal or the distance between two window signals is used, so to speak, as a trigger for scanning the thread supply, the length of time or angle of rotation range of the window signal being shorter than the time or angle of rotation range over which each circumferential section could be completely scanned.
  • the rotational position sensor can be aligned with a thread-free area of the storage body or its drive shaft.
  • the embodiment according to claim 6 is structurally simple and preferably suitable for thread delivery to a knitting machine.
  • the physical placement of the sensors shields them against the influence of extraneous light and enables their exact alignment and positioning.
  • the embodiment according to claim 8 has three sensors, the circumferential distances of which are selected such that first and second storage area circumferential sections can always be detected simultaneously.
  • rotational position signals are generated as window signals in order to determine when and over which area the storage area circumferential sections are scanned. Furthermore, each rotational position signal can be used to stop the storage body precisely, e.g. by braking the storage body by reversing the direction of the field in an asynchronous motor, or by seeking out the window signal in the crawl gear. Finally, a statement can be made about the speed of rotation, the acceleration or deceleration and the state: rotation or standstill, which can be important for accompanying safety functions.
  • the distance determination of the sensors results in an almost sinusoidal one that can be evaluated favorably Waveform.
  • the longitudinal bars and the spaces or longitudinal grooves themselves form the first and second storage area circumferential sections with clearly different (optical, mechanical and the like) scanning properties.
  • the contact surfaces for the thread turns are optimally small.
  • the scanning properties are very different because the surfaces of the longitudinal bars act like mirrors, while the spaces or the longitudinal grooves, e.g. with an optoelectronic scanning with reflection light, nonexistent or almost nonexistent.
  • the mirrored or chrome-plated and polished surfaces of the longitudinal bars ensure that the thread turns slide easily axially. Furthermore, a feed element can be easily integrated.
  • the discrimination between the thread signals and the memory area signals is carried out in a simple manner, the clearly detectable difference (signal voltage differences, signed or absolute) that can be evaluated in order to generate concise control signals. Since unequal signals appear in the circuit at the same time, regardless of which sensor produces one and which sensor generates the other unequal signal, there is a definite statement regarding the absence of the limit of the thread supply. If there are no simultaneous unequal signals in the logic circuit, then there is a definitive statement for the presence of thread turns in the scanning zone. It is also possible to make a statement about presence of thread in the scanning zone by discriminating between the same thread signals and the unequal signals.
  • the circuit can be integrated in a microprocessor control or regulation for the rotary drive or at least connected to it in order to control or regulate the rotary drive sensitively and to take application-specific parameters into account.
  • the embodiment according to claim 14 with a stationary storage body can be used universally as a weft storage and delivery device for weaving machines.
  • the rod cage design creates the required peripheral sections and allows the integration of a feed element.
  • the desired thread size can be set.
  • the embodiment according to claim 17 is inexpensive, compact and reliable.
  • the circumferential sections are designed with scanning properties that are as different as possible.
  • the embodiment according to claim 19 is not susceptible to interference.
  • the speed information is used for the safety monitoring in order to avoid faulty goods if no thread is delivered despite a work signal indicating the readiness to work. If, for example, the thread tension on the inlet side exceeds the torque of the rotary drive, then the rotary drive is no longer able to drive the storage body and provide sufficient thread in the thread supply. The machine is then switched off. A predetermined period of time from the occurrence of the working signal and the absence of the signal chain is necessary in order to ensure the normal start-up of the storage body from standstill or its acceleration, as can occur in normal operation.
  • the speed information can also be used to switch off when the thread supply is overfilled due to inoperable sensors. The maximum speed of the rotary drive is monitored over a predetermined period of time within which the limit of the thread supply can normally reach the detection zone and be detected. If this does not happen, after adding a time of e.g. 50% off the machine at this time.
  • the storage body is braked to a standstill when the relationship between the rotational speed and the thread consumption rate, for example after the consumption rate has dropped rapidly to zero, so that the withdrawal point of the thread no longer rotates. This would result in the thread running out an unwanted twist.
  • the brake prevents the storage body from overrun due to inertia. In the case of an asynchronous motor in a rotary drive, this could also be controlled electrically by reversing the field direction (electric motor brake).
  • a thread storage and delivery device F has a drum-shaped storage body 1 with a storage area 2 for a thread supply 5 made of thread turns 6 of a thread Y.
  • the storage body 1 can be driven to rotate about an axis 3 (arrow 4) and can be stopped.
  • the thread Y is fed tangentially to the storage body 1 and drawn off axially (varying thread length delivery to a knitting machine).
  • the movement of the lower limit of the thread supply 5 is scanned with a scanning device 7 for the presence or absence in a scanning zone 12 (shown for simplicity as a dash-dotted line), e.g. to generate drive control signals for a rotary drive, not shown in FIG. 1, of the storage body 1, which drives the storage body approximately in adaptation to the thread consumption.
  • the storage area 2 has at least two peripheral sections 8, 9 with different scanning properties A, B for two sensors SA, SB, which are arranged approximately in the circumferential direction and are spaced such that they can be aligned simultaneously on both circumferential sections 8, 9.
  • These are, for example, opto-electronic sensors SA, SB, each of which consists of a light source 10 (infrared light) and a receiver 11 (photodiode) responsive to reflection light.
  • the different scanning properties A, B of the peripheral sections 8, 9 can be predetermined by: high-contrast different colors, different light reflection or absorption, different distances from the sensors and the like. When using optoelectronic sensors with sharp imaging of the scanning zone 12, different patterns can be used justify the respective scanning properties A, B in the peripheral sections 8, 9.
  • rotary drive sets the storage body 1 only in e.g. a rotational position X still, in which the sensors SA, SB are aligned with the peripheral sections 8, 9.
  • any number of first and second, approximately equally wide circumferential sections 8, 9 are regularly alternately distributed over the circumference of the storage area and at least three sensors S are aligned with one another approximately in the circumferential direction and are spaced such that regardless of the rotational position of the storage body 1, a sensor is always simultaneously aligned with a first and a second circumferential section 8, 9.
  • the storage body 1 can stop in any rotational position.
  • FIG. 1 shows the sensor signals generated in the operating position in which the thread supply 5 is at a distance from the scanning zone 12.
  • the sensors SA, SB generate signals when A and B pass through X, one with a high signal level and one with a low signal level, the signal difference of which is d1.
  • the storage body 1 stops in the rotational position X, then the scanning results in continuous storage area signals A, B with the signal difference d1 (differential voltage).
  • the two discontinuous memory area signals or (with the memory body 1 stationary) the two continuous memory area signals A, B occur during the scanning (with the memory body 1 rotating), the thread supply 5 has not reached the scanning zone 12.
  • the rotary drive must be switched on, kept switched on or accelerated.
  • the sensors SA, SB In the rotational position X of the storage body 1, the sensors SA, SB then generate the same continuous thread signals Y (one double line in the diagram of FIG. 2 with a measurable difference d2).
  • the double line shown higher in the diagram represents thread signals for a thread with a scanning characteristic similar to that the circumferential section 8, while the lower double line shows the thread signals for a thread Y which has the scanning characteristic B of the circumferential section 9.
  • the rotary drive is decelerated or stopped, whereby it stops in the rotational position X.
  • the scanning is continued when the memory body is at a standstill, the thread signals which are identical to one another continue to be present. If thread is consumed, then the peripheral sections 8, 9 are exposed in the scanning zone 12.
  • the sensors SA, SB simultaneously generate unequal continuous storage area signals (diagram of FIG. 1). The rotary drive is switched on.
  • the storage body 1 is arranged stationary on a housing 13.
  • the rotary drive 15 is contained in the housing 13 and drives a winding element 14 for the purpose of forming the thread supply 5.
  • a feed device not shown, conveys the thread supply 5 or the thread windings 6 in the axial direction.
  • the thread Y is withdrawn overhead from the thread supply 5.
  • the scanning device 7 is aligned with the scanning zone 12 with two sensors SA, SB.
  • the storage area 2 has circumferentially offset circumferential sections 8, 9 with mutually different scanning properties A, B.
  • the sensors SA, SB are circumferentially spaced such that each sensor SA, SB is on a peripheral portion 8, 9 is aligned.
  • the limit of the thread supply 5 has the scanning zone in FIG. 3 12 not yet reached.
  • the memory area signals generated by the sensors SA, SB are indicated as horizontal lines with different signal levels (difference d1).
  • the rotary drive 15 is or remains switched on in order to feed thread Y until it covers the peripheral sections 8, 9 in the scanning zone 12. Assuming that the scanning properties of the thread supply 5 are approximately in the middle between the scanning properties A and B, the sensors SA, SB then generate the same thread signals (dashed double line). From this it is deduced that the rotary drive 15 is to be stopped. The continued scanning confirms the standstill as long as no change (no consumption) takes place. If thread Y is consumed, the peripheral sections 8, 9 are released again. The unequal memory area signals are present. The rotary drive 15 is switched on again, possibly with a certain delay.
  • the rotary drive 15 (electric motor) with a shaft 16 is mounted in the housing 13, which positions the scanning device 7 in alignment with the storage surface 2 with a housing part , on which the storage body 1 designed as a rod cage is fastened.
  • It consists of longitudinal rods R with intermediate spaces Z (see FIG. 5), the rods R and the spaces Z being of equal width and alternating. Instead of continuous gaps Z, open longitudinal grooves can be formed on the outside.
  • the rods R and the intermediate spaces Z and the longitudinal grooves form first and second circumferential sections 8 and 9 with scanning properties which are clearly different from one another for the sensors S of the scanning device 7.
  • There are three Sensors S are spaced apart in the circumferential direction in such a way that at least one first circumferential section 8 and at least one second circumferential section 9 are scanned by at least one sensor S.
  • a spoke star or spoke ring 19 is provided as the feed element V, the spokes 18 of which penetrate the spaces Z and lead to a rotary bearing 17 on the shaft 16.
  • the pivot bearing 17 and the spoke star 19 are inclined relative to the axis 3 of the storage body 1. Since the rotary bearing 17 is arranged on a sleeve 17a which is held in a rotationally fixed manner with respect to the shaft 16, the spoke star 19 moves the thread supply 5 to the scanning zone 12 during the rotating movement of the storage body 1.
  • the thread storage and delivery device F according to FIG. 4 is used, for example, for thread delivery to a knitting machine.
  • the thread is pulled off overhead and axially.
  • the scanning device 7 can if necessary be adjusted in the direction of an arrow 19 in order to change the thread supply size.
  • the scanning device 7 is linked via a circuit L to a control device C for the rotary drive 15 which - as explained - feeds as much thread Y to the thread supply 5 by rotating the storage body 1 as is necessary to maintain the thread supply size during consumption.
  • the three sensors S are housed together in a housing 30 which is anchored to the housing 13.
  • Cover disks 31 shield the sensors S against impurities.
  • Fig. 5 are five rods R or first peripheral sections 8 with the intermediate second circumferential sections 9 (spaces Z or longitudinal grooves) shown in a development.
  • the scanning zone 12 with the three sensors S is located just outside the thread supply 5.
  • the distances a and b seen in the circumferential direction between adjacent sensors are matched to the circumferential widths a1 and b1 of the circumferential sections 8 and 9 in such a way that in each rotational position of the storage body 1 at least one sensor S scans a first circumferential section 8 and at the same time at least one further sensor S scans a second circumferential section 9.
  • the distances a and b are slightly larger than the distances a1 and b1.
  • a and b could also be smaller than a1, b1. If the peripheral sections 8 and 9 are of different widths, it may be necessary to arrange the sensors at certain intermediate distances in order to meet the aforementioned condition. In the case of three sensors and longitudinal rods R of equal width and spaces Z, the distance between two sensors is expediently 2/3 of the width of a longitudinal rod R or an even multiple thereof.
  • the peripheral sections 8, 9 in FIG. 5 have different scanning properties A, B.
  • the sensors S When the storage body is rotated in the direction of arrow 4, the sensors S generate the storage area signal chains 20, 21 and 22 shown in FIG. 6.
  • Each signal chain 20, 21, 22 consists of successive high and low signal levels 27, 28. They are in each rotational position of the storage body two unequal storage area signals present at the same time.
  • In the rotational position X in FIG. 6 there is a low signal level 28 in the signal chain 20, a high signal level 27 in the signal chain 21 and a low signal level 28 in the signal chain 22. From the If at least two unequal storage area signal levels 27, 28 occur simultaneously, the absence of the thread supply 5 in the scanning zone 12 is indicated.
  • the peripheral sections 8, 9 are covered.
  • the sensors S generate the continuous thread signal chains 24, 25 and 26 shown in FIG. 7 with the signal level 29.
  • the rotary drive is stopped or decelerated.
  • the scan continues.
  • the circumferential sections 8, 9 are released again in the scanning zone 12 when the thread is consumed, the unequal storage area signal levels are again present, from which a control signal for switching on or accelerating the rotary drive is derived.
  • Fig. 9 is a block diagram of a circuit L (Fig. 4).
  • the sensors S are connected in parallel to inverting gates 32, 33, 34.
  • the signal of each sensor S is fed via a loop 38 to the output of gate 32, 33, 34 and is present at the input of a downstream gate 39, 40 and 41, respectively.
  • the outputs of the gates 32, 33, 34 are connected via lines 56, 55, 57 to second inputs of the gates 39, 40, 41.
  • Bypass loops 42 lead from lines 55, 56, 57 to the respective outputs of gates 39, 40, 41, loops 42 containing identically designed resistors.
  • the outputs of the gates 39, 40, 41 are connected to the first inputs of further gates 43, 44, 45.
  • To the Second inputs of the gates 43, 44, 45 are connected via a line 54 to a reference voltage which is derived from the voltage supply 36 via a gate 53 and is also present at the outputs of the gates 43, 44, 45 via loops 46.
  • the outputs of the gates 43, 44, 45 are brought together via parallel diodes 47 in a node 48 which is connected to the control side of a transistor 49.
  • a capacitor 58 for smoothing the signals is provided in parallel with node 48.
  • the transistor 49 controls an opto-coupler 50, from which current control elements 51, 52 in supply lines of the rotary drive (not shown) are controlled.
  • circuit L when simultaneous, mutually unequal memory area signals are present, inter alia by the cross-connection by means of lines 55, 56, 57, a specific control signal is generated at node 48, while when the same thread signals are present, either no or another control signal is formed at node 48.
  • the level changes occurring in the signal chains 21, 22, 23 during the rotational movement of the memory body 1 are compensated for in the logic circuit.
  • the transistor 49 switches on, so that the rotary drive is supplied with voltage via the optocoupler 50 and the control elements 51, 52. If the same thread signals are present, then the transistor 49 interrupts the voltage supply to the optocoupler 50, so that the control elements 51, 52 interrupt or modulate the power supply.
  • each signal level is compared with every other signal level and the respective difference with its sign determined. If all differences lie or at least one of the evaluable difference values lies above a predetermined threshold value, then the rotary drive is energized.
  • the signals of the three sensors S are processed in a different way by comparing the largest signal level with the smallest signal level and determining this difference. If the difference is above a threshold value, the rotary drive is energized.
  • the necessary different scanning properties A, B result from the different light reflection of the longitudinal bars R, 8 and the spaces Z or the longitudinal grooves 9.
  • the outer surfaces of the longitudinal bars R are expediently mirrored or chromed and polished in order to allow the thread turns 6 to slide easily and to ensure a strong reflection.
  • a light-absorbing background can be provided in the spaces Z or longitudinal grooves 9 or behind. All types of sensors can be used as sensors which are capable of generating two different signal levels when the first and second peripheral sections 8, 9 are scanned.
  • infrared sensors D7, D8, D9 and receivers T1, T2, T3, which are constantly supplied with current, are connected as sensors S via load resistors to downstream operational amplifiers 59, 60, 61, the amplifying effect of which is determined by the coupling of further resistors.
  • the outputs of operational amplifiers 59, 60, 61 are e.g. Crossovers 62, 69, 70, connected to a diode network D1, D2, D3 and D4, D5, D6 and a central load resistor R2.
  • the useful signal at the load resistor R2 is tapped using operational amplifiers 65, 66 in order to subsequently generate a useful signal amplitude using an amplifier 67 in a differential circuit.
  • the amplifiers 65, 66, 67 form an electrometer subtractor.
  • a subsequent low-pass filter is provided in front of an amplifier 68, which forms an adjustable comparator, which controls the rotary drive on the output side or supplies a control device (not shown) for the rotary drive.
  • a line or speed detector 64 is applied to line 62 via a line 63, which provides information on the speed or state of "rotation or standstill” or also on the rotational position of the storage body from the frequency of the output signal change of amplifier 59.
  • the statement can be used for further control or monitoring functions, eg for rotary actuators, or for fault detection.
  • the circuits L in FIGS. 12 and 9 only represent possibilities. Similar or identical functions can be achieved in the same or similar way with differently grouped or linked electronic components or with a microprocessor control device.
  • a thread storage and delivery device with a rotatable storage body 1 In a thread storage and delivery device with a rotatable storage body 1, according to FIGS. 10 and 11, the storage area defining, regularly successive longitudinal bars R, 8 and spaces Z, B are provided.
  • the scanning zone 12 there are two sensors S spaced a in the circumferential direction. a corresponds to half the distance a1 of two longitudinal bars R, 8.
  • the thread supply is conveyed downwards by means of the feed element V (spokes 19).
  • a rotary position sensor S T is additionally arranged above the feed element V and is axially aligned with one of the sensors S.
  • the rotational position sensor S T could, however, also be provided in a different position or, if necessary, scan the shaft of the storage body.
  • the gaps Z form in the scanning area of the rotational position sensor S T symmetrically narrowed extensions 9 ', so that there are circumferentially spaced, scannable memory body sections whose circumferential dimensions are smaller than the circumferential dimensions of the gaps Z.
  • the high signal levels 27' in the signal chain 22 'of the rotational position sensor S T used simultaneously, and only sample as in a strobe light, the signal chains 20, 21 and 24, 25 of the sensors S, when a high signal level 27 'of the rotary position sensor ST is applied.
  • the signal or level transitions at the transitions from the spaces Z to the rods R are scanned more densely. This principle is also expedient in the case of three sensors S (see FIGS.
  • the signal chain 22 ' can be evaluated as a current statement regarding the rotational speed, deceleration and acceleration and for standstill or for running and for further control or monitoring tasks or also for speed control of the rotary drive.
  • the window or pivot position signals (signal level 27 'in FIG. 11) should be shorter in time than and within the storage area signal levels 27, 28.
  • a working signal (device ON) is generated as usual for a working thread storage and delivery device F. Due to thread consumption, since the thread supply on the storage area is reduced, the rotary drive should run or accelerate. If the thread tension on the feed side of the storage body increases so that it exceeds the torque of the rotary drive, the latter is blocked. This would lead to a malfunction in the operation of the device and the knitting machines. Since each signal chain 20, 21, 22, 22 'represents the speed of rotation of the storage body and only occurs when the storage body is rotating, this requirement is taken into account as the reason for the shutdown.
  • a machine stop switch with a time keeping function which is based on the Working signal of the thread storage and delivery device F responds and waits a predetermined time period when the working signal is present, whether a signal chain occurs or information about the rotary movement can be tapped. If this information is not available for longer than the predetermined period of time, the machine is switched off because the proper supply to the knitting machine is at risk.
  • Each of the above-mentioned signal chains can also be used for quality assurance of the knitted goods, the information contained in the signal chain being compared with information about the thread consumption rate. If the thread consumption rate drops at the moment while the storage body is still rotating at high speed, then the thread take-off point will rotate and the thread will be twisted due to the overhead take-off. This twisting is undesirable.
  • An evaluation and comparison circuit which is coupled to the control device of the rotary drive and receives information about the current consumption rate and also monitors the respective signal chain, determines the relationship between the speed of rotation of the storage body and the thread consumption rate. If the thread consumption rate falls while the storage body is still rotating rapidly, then the storage body is stopped immediately with this circuit, if necessary by switching a brake, in order to avoid the harmful twisting.
  • a safety function is carried out when the storage area is overfilled.
  • the rotational speed of the storage body which is tapped from one of the aforementioned signal chains, is examined for its maximum value. Will the maximum rotation speed determined, it is then waited over a predetermined period of time whether the sensors respond and report the thread supply in the scanning zone. The length of time is chosen so that the thread supply had to reach the scanning zone even with maximum consumption. If the sensors do not respond within the time period, then an additional time of approx. 50% of this time is waited before the machine is switched off because the absence of the sensor signals at the end of the time period indicates that the sensors are not working properly and the memory area is overflowing is.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)
  • Filamentary Materials, Packages, And Safety Devices Therefor (AREA)
  • Looms (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
  • Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
EP94117383A 1993-12-17 1994-11-03 Procédé pour détecter une réserve de fil dans un dispositif pour emmagasiner et délivrer le fil, et dispositif pour emmagasiner et délivrer le fil Expired - Lifetime EP0658507B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9304257A SE502175C2 (sv) 1993-12-17 1993-12-17 Förfarande och anordning för fastställande av trådmagasinets variation på en fournissör
SE9304257 1993-12-17

Publications (2)

Publication Number Publication Date
EP0658507A1 true EP0658507A1 (fr) 1995-06-21
EP0658507B1 EP0658507B1 (fr) 1998-02-25

Family

ID=20392187

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94117383A Expired - Lifetime EP0658507B1 (fr) 1993-12-17 1994-11-03 Procédé pour détecter une réserve de fil dans un dispositif pour emmagasiner et délivrer le fil, et dispositif pour emmagasiner et délivrer le fil

Country Status (14)

Country Link
US (1) US5765399A (fr)
EP (1) EP0658507B1 (fr)
JP (1) JP2859440B2 (fr)
KR (1) KR100345614B1 (fr)
CN (1) CN1132774C (fr)
BR (1) BR9408326A (fr)
CZ (1) CZ285707B6 (fr)
DE (1) DE59405305D1 (fr)
ES (1) ES2114647T3 (fr)
RU (1) RU2125965C1 (fr)
SE (1) SE502175C2 (fr)
TR (1) TR28288A (fr)
UA (1) UA29491C2 (fr)
WO (1) WO1995016628A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996035834A1 (fr) * 1995-05-08 1996-11-14 Heinrich Fabschitz Appareil de regulation de la vitesse de rotation d'une unite d'entrainement d'un tambour de devidoir de fil
WO2009124592A1 (fr) * 2008-04-10 2009-10-15 Memminger-Iro Gmbh Détecteur de fil optique insensible à la lumière ambiante

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19545891A1 (de) * 1995-12-08 1997-06-12 Memminger Iro Gmbh Verfahren zum Überwachen der Abtastverhältnisse beim Steuern einer Fadenliefervorrichtung
GB2308137B (en) * 1995-12-16 1999-08-11 Memminger Iro Gmbh Method for surveying the detection conditions for controlling a yarn feeding d evice
IT1292277B1 (it) * 1997-04-24 1999-01-29 Lgl Electronics Spa Tastatore ottico perfezionato per la sorveglianza della riserva di filato negli apparecchi alimentatori di trama ed apparecchio
SE9703369D0 (sv) * 1997-09-16 1997-09-16 Iro Ab Verfahren zum zwischenspeichern von faden und liefergerät
CN1069710C (zh) * 1998-08-31 2001-08-15 慈溪市太阳纺织器材有限公司 织机专用的储纬器及其纱线供给方法
DE19859274A1 (de) * 1998-12-22 2000-06-29 Schlafhorst & Co W Vorrichtung zur Erkennung von Fremdstoffen in strangförmigen textilen Material
DE10014623A1 (de) * 2000-03-24 2001-09-27 Iro Patent Ag Baar Verfahren zum Steuern eines Webmaschinen-Fadenliefergeräts
CN102146612B (zh) * 2010-02-09 2013-05-08 典洋针织机械股份有限公司 电磁离合的储纱器装置及其纱线检测方法
IT1402928B1 (it) * 2010-12-13 2013-09-27 Roj S R L Porgitrama per telaio tessile
JP6267580B2 (ja) * 2014-05-14 2018-01-24 Ｔｍｔマシナリー株式会社 糸巻取装置及びマーキング形成方法
ITMI20150031U1 (it) * 2015-02-12 2016-08-12 Btsr Int Spa Alimentatore di filo, del tipo a tamburo rotante con rilevamento della densita' di filo presente su di esso
JP2021001038A (ja) * 2019-06-19 2021-01-07 村田機械株式会社 摩耗判断システム及び繊維機械システム

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH393218A (de) * 1962-01-19 1965-05-31 Siemens Ag Uberwachungseinrichtung für Spulen, insbesondere für Webstühle
GB1168905A (en) * 1967-03-22 1969-10-29 Rosen Karl I J A Yarn Storing Device
DE1937058B1 (de) * 1969-07-21 1971-03-25 Rosen Karl I J Textil-,insbesondere Strickmaschine,zum Verarbeiten geoelten oder paraffinierten Fadens
DE2221655B2 (de) * 1972-05-03 1977-08-04 Rosen, Karl Isac Joel, Dr, Ulncehamn (Schweden) Fadenspeicher- und liefervorrichtung
US4180215A (en) * 1977-09-29 1979-12-25 Sipra Patententwicklungs- Und Beteiligunsgesellschaft Mbh Thread storage and supply arrangement for textile machines
US4325520A (en) * 1978-01-31 1982-04-20 Sulzer Brothers Limited Apparatus for storing filamentary material
EP0174039A2 (fr) * 1984-09-04 1986-03-12 Picanol N.V. Variateur de vitesse pour un fournisseur de trame dans les métiers à tisser
EP0192851A2 (fr) * 1985-02-23 1986-09-03 SOBREVIN Société de brevets industriels-Etablissement Dispositif fournisseur de fil

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3864442D1 (de) * 1987-04-24 1991-10-02 Sulzer Ag Schussfadenspeicher mit automatischer fadenabmessung fuer webmaschine.
US5377922A (en) * 1990-06-06 1995-01-03 Iro Ab Sensing and/or analysis system for thread feeder
US5211347A (en) * 1990-06-29 1993-05-18 Sobrevin Societe De Brevets Industriels-Etablissement Thread feed device
SE511091C2 (sv) * 1993-04-21 1999-08-02 Sipra Patent Beteiligung Garnmatare för textilmaskiner

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH393218A (de) * 1962-01-19 1965-05-31 Siemens Ag Uberwachungseinrichtung für Spulen, insbesondere für Webstühle
GB1168905A (en) * 1967-03-22 1969-10-29 Rosen Karl I J A Yarn Storing Device
DE1937058B1 (de) * 1969-07-21 1971-03-25 Rosen Karl I J Textil-,insbesondere Strickmaschine,zum Verarbeiten geoelten oder paraffinierten Fadens
DE2221655B2 (de) * 1972-05-03 1977-08-04 Rosen, Karl Isac Joel, Dr, Ulncehamn (Schweden) Fadenspeicher- und liefervorrichtung
US4180215A (en) * 1977-09-29 1979-12-25 Sipra Patententwicklungs- Und Beteiligunsgesellschaft Mbh Thread storage and supply arrangement for textile machines
US4325520A (en) * 1978-01-31 1982-04-20 Sulzer Brothers Limited Apparatus for storing filamentary material
EP0174039A2 (fr) * 1984-09-04 1986-03-12 Picanol N.V. Variateur de vitesse pour un fournisseur de trame dans les métiers à tisser
EP0192851A2 (fr) * 1985-02-23 1986-09-03 SOBREVIN Société de brevets industriels-Etablissement Dispositif fournisseur de fil

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996035834A1 (fr) * 1995-05-08 1996-11-14 Heinrich Fabschitz Appareil de regulation de la vitesse de rotation d'une unite d'entrainement d'un tambour de devidoir de fil
US5894744A (en) * 1995-05-08 1999-04-20 Fabschitz; Heinrich Speed control apparatus for yarn winding storage drum
WO2009124592A1 (fr) * 2008-04-10 2009-10-15 Memminger-Iro Gmbh Détecteur de fil optique insensible à la lumière ambiante

Also Published As

Publication number Publication date
UA29491C2 (uk) 2000-11-15
DE59405305D1 (de) 1998-04-02
KR100345614B1 (ko) 2002-11-30
EP0658507B1 (fr) 1998-02-25
CZ285707B6 (cs) 1999-10-13
SE9304257D0 (sv) 1993-12-17
RU2125965C1 (ru) 1999-02-10
BR9408326A (pt) 1997-08-19
US5765399A (en) 1998-06-16
KR970700131A (ko) 1997-01-08
CZ150196A3 (en) 1996-09-11
ES2114647T3 (es) 1998-06-01
WO1995016628A1 (fr) 1995-06-22
CN1137782A (zh) 1996-12-11
CN1132774C (zh) 2003-12-31
TR28288A (tr) 1996-04-24
JPH09507047A (ja) 1997-07-15
JP2859440B2 (ja) 1999-02-17
SE9304257L (sv) 1995-06-18
SE502175C2 (sv) 1995-09-04

Similar Documents

Publication Publication Date Title
DE3247545C2 (fr)
EP0658507B1 (fr) Procédé pour détecter une réserve de fil dans un dispositif pour emmagasiner et délivrer le fil, et dispositif pour emmagasiner et délivrer le fil
EP0530492B1 (fr) Procédé pour la détection de défauts d'un produit textile en bande
EP1143236B1 (fr) Procédé et dispositif de détection optique d'impurtés, en particulier de fibres, dans des fils à coudre défilants
CH644647A5 (de) Verfahren zur ueberwachung eines webstuhls und vorrichtung zur durchfuehrung des verfahrens.
DE3824034C1 (fr)
DE4116638C2 (de) Vorrichtung zur Feststellung einer bestimmten Restmenge an Spulenfaden
CH663402A5 (de) Verfahren zum bestimmen der auf eine kreuzspule mit reibantrieb durch eine nutentrommel aufgewickelten garnlaenge.
EP0308609A2 (fr) Dispositif d'alimentation du fil pour des machines textiles à consommation de fil temporairement différent, notamment our des machines à tricoter
DE3800717A1 (de) Naehmaschine mit einem fadenwaechter
EP0868382B1 (fr) Procede de surveillance des conditions d'exploration pendant l'operation de commande d'un fournisseur de fil
EP0837829B1 (fr) Detecteur optoelectronique et dispositif de mesure et d'amenee de fil de trame
DE2533754A1 (de) Verfahren und vorrichtung zum verarbeiten von straengen
DE69510159T2 (de) Vorrichtung und Verfahren zur Überwachung der Fadenreserve in Schussfadenliefervorrichtungen
DE3133494C2 (de) Opto-elektronische Überwachungsvorrichtung
DE1535051C3 (de) Steuervorrichtung an Spinn- und Zwirnmaschinen zum Steuern der Hubumkehr einer Ring- oder Spindelbank
DE3731379C2 (fr)
DE69611723T2 (de) Vorrichtung zum regeln der drehgeschwindigkeit einer antriebseinheit für eine fadenwickel- und speichertrommel
EP0380923B1 (fr) Machine textile, en particulier métier à filer
DE2428898C3 (de) Überwachungsvorrichtung für fehlerhafte Nadeln an Maschinen zur Herstellung von Maschenware
DE60107934T2 (de) Verfahren zum fühlen und zählen von wicklungen einer speichertrommel und vorrichtung zur herstellung des verfahrens
DE69209026T2 (de) Vorrichtung zum Messen der Dicke eines Blattproduktes
DE2059418A1 (de) Vorrichtung zum Steuern von Maschinen zum Verarbeiten von Materialstraengen
DE60013683T2 (de) Verfahren und Vorrichtung zur Steuerung von Rotationssignale des Fadenzuführungsrohr in Fadenliefervorrichtungen für Webmaschinen
DE19517757A1 (de) Ringspinnmaschine mit einer Einrichtung zum Verhindern des Drehens der Spindeln

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19950303

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE CH DE ES FR GB IT LI NL SE

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 19970402

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE CH DE ES FR GB IT LI NL SE

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19980226

REF Corresponds to:

Ref document number: 59405305

Country of ref document: DE

Date of ref document: 19980402

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: BOVARD AG PATENTANWAELTE

ET Fr: translation filed
ITF It: translation for a ep patent filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2114647

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20011127

Year of fee payment: 8

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030601

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20030601

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20031120

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20031124

Year of fee payment: 10

Ref country code: BE

Payment date: 20031124

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20041119

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041130

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041130

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041130

BERE Be: lapsed

Owner name: *MEMMINGER-IRO G.M.B.H.

Effective date: 20041130

Owner name: *IRO A.B.

Effective date: 20041130

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050729

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20051104

EUG Se: european patent has lapsed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20061218

Year of fee payment: 13

BERE Be: lapsed

Owner name: *MEMMINGER-IRO G.M.B.H.

Effective date: 20041130

Owner name: *IRO A.B.

Effective date: 20041130

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20071129

Year of fee payment: 14

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20071103

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20071103

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20081104

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20081104

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20131126

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20131126

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 59405305

Country of ref document: DE

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 59405305

Country of ref document: DE