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
  • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
  • B65H63/003—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to winding of yarns around rotating cylinders
• • 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

Definitions

• the invention relates to a device for monitoring rotating parts of machines and systems for the production, processing and processing of monofilaments, yarns, wires, tapes, webs and the like for emerging windings or casseroles with a surface arranged opposite the surface of the rotating part.
• sensor consisting of a transmitter and a receiver.
• Under wires are, for example, metal wires, z. B. paper tapes or those made of textile fabrics, plastic or metal foils and webs of paper webs, webs of textile fabrics or knitted fabrics, nonwovens, plastic or metal foils or the like.
• yarns are wound onto cylindrical tubes in certain production stages. These sleeves on the winding machines and systems are usually driven according to the friction principle. So-called friction, drive or delivery rollers are used for the drive, which are touched by the sleeves to be driven along a surface line.
• the yarn to be wound onto the tube runs - viewed in the direction of yarn travel - in front of the roller / tube contact point with a specific wrap angle over the roller. If there is a break in the yarn or - if it is a filament yarn - individual filaments of the yarn, the end of the yarn lying on the roller in front of the roller / sleeve contact point or the filament ends lying on the roller in front of the roller / sleeve contact point in most cases on the roller.
• Devices which detect the build-up or formation of windings on rotating parts of, for example, winding machines and systems and report such a fault by passing on a signal and / or bring the relevant winding unit, machine or system to a standstill.
• These devices work mechanically; there are movably arranged sensors in the form of levers, rulers. Rails or the like are used, which are usually parallel to the axis of the rotating part and have a certain distance from the surface thereof. The dimension of this distance is u. a. due to the dimensions of the sensors, the type of attachment and the possibility of aligning the sensors, the operability of the machine and the consideration of the accident prevention regulations. However, this also stipulates that the resulting roll must reach a certain thickness on the surface of the rotating part before it comes into contact with the sensor.
• the mechanically working sensor When the winding is built up, the mechanically working sensor is first touched by the growing winding and then travels a certain distance with the increase in the diameter of the winding, at the end of which a switch connected to the sensor responds, which generates a signal.
• This monitoring device works on the principle of changing the intensity (in the sense of a weakening or amplification) of the (light) beam to be received by the receiver;
• contamination of the transmitter output and / or the receiver input and / or the roller surface, but also light from an external light source, can lead to a change in the intensity of the light beam with the result of an incorrect switching.
• DE-C-885 908 also describes the use of contactless transmitting and receiving devices to prevent the undesirable Known winding of threads on rotating rollers.
• the signal triggered during the winding formation is also caused here by a change in the intensity of the light beam falling on the photocell (cf. US Pat. No. 4,188,545) due to a change in the degree of reflection or absorption of the surface of the monitored roller.
• Certain requirements are placed on the degree of reflection or absorption of the roller surface and also of the threads.
• contamination of the transmitter output and / or the receiver input, as well as light from an external light source can also lead to a change in the intensity of the light beam, so that incorrect switching is possible.
• FR-A-1 391 183 also describes the use of a contactless transmitting and receiving device, however, this involves monitoring a linear movement or the standstill of a linearly moving part.
• FR-A-1 391 183 exemplifies the use for controlling the movement of a textile machine; this could be the movement of a ring bench on a twisting or draw twisting machine, in which the point in time at which the standstill at the reversal points or the position of the reversal point is monitored.
• the device according to FR-A-1 391 183 would also be suitable for determining unintentional stoppages of the ring bench within the lifting movement, but not for determining an unintentional wrap of a rotating machine part by, for example, B. yarns, wires and webs.
• the invention has for its object to provide a device for monitoring rotating parts for emerging windings or casseroles of the type mentioned, with the resulting windings or casseroles on rotating parts can be reliably detected, while at the same time being based on a high level of interference immunity should be placed.
• the thickness of the roll on this roller was measured. Only a few game layers could be determined, the total thickness of which was less than 0.5 mm.
• the surface of the rotating parts is designed so that markings are formed. These markings must of course be designed in such a way that they also meet the technological requirements, which relate, among other things, to the surface shape and roughness and the wear.
• the marking of the rotating parts can e.g. B. done by dividing their surface into zones of different brightness or into zones of different reflectance. This can be distinguished, for example, by coloring surface parts, by applying or inserting surface parts made of materials other than the base material from which the surface of the rotating part is made Liche execution of the surface structure and / or different execution of the surface roughness and / or different execution of the form accomplish.
• switching elements z. B. relays can be used.
• the design can be such that the sensor is working in the visible light range and the markings have a different brightness compared to the rest of the surface of the rotating part or that the sensor is working in the ultraviolet radiation (UV) range and the markings are opposite have a different UV reflectance on the remaining surface of the rotating part or that the sensor is working in the area of ultrasound (US) and the markings have a different US reflectance compared to the remaining surface of the rotating part.
• the sensor can also be a pneumatic one, the markings having a different shape from the rest of the surface of the rotating part.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Quality & Reliability (AREA)
• Treatment Of Fiber Materials (AREA)
• Filamentary Materials, Packages, And Safety Devices Therefor (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=6201337

Family Applications (1)

Country Status (4)

Families Citing this family (18)

Family Cites Families (20)

• 1983
  • 1983-06-11 DE DE3321261A patent/DE3321261C2/de not_active Expired
  • 1983-10-26 EP EP83110662A patent/EP0128240B1/de not_active Expired
  • 1983-10-26 DE DE8383110662T patent/DE3368584D1/de not_active Expired
  • 1983-10-28 US US06/546,406 patent/US4609915A/en not_active Expired - Fee Related
• 1984
  • 1984-04-05 JP JP59066821A patent/JPS602573A/ja active Granted

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