Classifications

• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B7/00—Flat-bed knitting machines with independently-movable needles
  • D04B7/24—Flat-bed knitting machines with independently-movable needles for producing patterned fabrics

Definitions

• the invention relates to a flat knitting machine according to the preamble of claim 1.
• a flat knitting machine with a pulse generator for electronic control in which a sprocket rigidly connected to a pulse disk of a pulse generator is driven with an endless chain synchronously with the movement of the knitting carriage.
• the pulse generator for the electronic control generates pulses corresponding to the needle cycle of the flat knitting machine by means of the pulse disk having a corresponding division.
• DE-OS 2 919 369 also describes an embodiment in which a pinion that is directly and rigidly connected to the slide slides positively on a tooth element.
• this arrangement has advantages over the previously described embodiment, since a good assignment of the number of needles to the needle stroke even with a fine needle pitch and over a long working period long needle beds is guaranteed. In practice, it has been found that this arrangement also has disadvantages.
• the slide and thus also the pinion of the pulse generator which is directly and rigidly connected to the slide is guided by a slide guide and / or running rail.
• the tooth element in which the pinion which is directly and rigidly connected to the slide engages, is arranged on a rail which extends parallel, but laterally and at a distance from the slide guide and / or running rail.
• a rail which extends parallel, but laterally and at a distance from the slide guide and / or running rail.
• the consequence of changing or uneven height spacing between the slide guide and / or the running rail and the tooth element is that the pinion is either pressed too strongly onto the tooth element due to the rigid connection to the slide or is removed from it so far that it no longer rotates becomes.
• the distance between the slide guide rail and tooth element becomes too large, a secure rotation of the pinion corresponding to the needle pitch is no longer guaranteed, so that the needle clock pulses emitted by the pulse generator are not generated or are not generated sufficiently synchronously with the respective needles.
• the invention is therefore based on the object of providing a flat knitting machine with a pulse generator device and a tooth element which runs parallel to the direction of movement of a lock carriage arrangement and which has a secure, synchronous function over a long service life
• the object is achieved in that the clock device is connected to the lock carriage arrangement in a height-adjustable manner.
• the feature of the invention, the timing device and thus the toothed disc not rigidly connected to the lock slide arrangement it is possible to compensate for unavoidable changes in the height distance between the slide guide and / or track and the tooth element over the entire length of the flat knitting machine. In this way, too much pressing of the toothed disc against the tooth element is avoided, as is the case in which the toothed disc is so far apart from the tooth element that it no longer engages and is rotated in the counting element.
• the clock generator arrangement is connected to the lock slide arrangement via a bearing arm and a rotary bearing.
• This embodiment is particularly simple because the constructional and partial effort is low.
• the clock arrangement is connected to the lock slide arrangement via an elastic element.
• the elastic element ensures that the pressure with which the toothed disc on the Teeth element is pressed, regardless of the vertical distance between the slide guide and / or track and tooth element is always constant. This also solves the task set to ensure safe needle-synchronous clock pulse generation and to keep the mechanical load on the toothed washer and tooth element low.
• a spring telescope element, but also a pneumatic element, can preferably be provided as the elastic element.
• the clock generator arrangement has an impeller which runs on a clock generator running rail.
• the weight of the clock device is essentially borne by the impeller.
• the tooth element is advantageously fastened to the clock generator running rail. It is possible to provide the tooth element on both the top and bottom of the clock running track. However, it is particularly advantageous if the tooth element is fastened to the underside of the clock running rail. In connection with the embodiment in which the clock generator arrangement has an impeller which runs on the clock generator running rail, a secure engagement of the toothed disk in the tooth element without mechanical stress or stress is ensured continuously and over the entire length of the knitting machine. It is. Easy to manufacture, to keep the distance between the top of the clock running rail and the underside of the tooth element over the entire length of the flat knitting machine with low tolerance.
• the he inventive feature to connect the clock device height adjustable with the carriage arrangement prevents .. ⁇ that on the one hand the impeller is too far apart from the clock rail when the distance between it and the slide guide and / or running rail is too great, and on the other hand at If the distance between the clock generator rail or tooth element and the slide guide rail is too small, excessive pressure is exerted on the toothed disc and / or on the tooth element.
• the tooth element is a toothed belt.
• racks are also possible.
• the tooth element is advantageously made of a wear-resistant plastic. Due to the good machinability, such elements can be manufactured inexpensively and precisely.
• a particularly advantageous embodiment of the invention also consists in clamping a toothed belt between the clock generator running rail and a counter rail, leaving a strip area free for rolling off the toothed pulley.
• Fig. 1 is a schematic representation of a h he execution orm
• Fig. 2 shows the embodiment shown in Figure 1
• a lock carriage arrangement 19 with a carriage 1 above one Needle bed 2 guided and held on a slide guide and / or running rail 3.
• the carriage 1 is connected via a carriage arm 4 to a driver part 5 which, as can be seen from FIG. 2, is fastened to a drive toothed belt 7 via a clamping plate 6.
• a timing device 10 is connected to the driver part 5 via an articulated arm 11 and an articulation 8 having an articulated shaft 9.
• the clock device 10 is attached to the end of the articulated arm 11 facing away from the joint 8.
• the clock device 10 has an impeller 12 with an impeller axis 13 and a toothed disc 14 with a toothed disc axis l ⁇ .
• the distance between the impeller axis 13 and the toothed disc axis 14 is fixed and constant.
• a clock running track 16 is rigidly fastened, on which the running wheel 12 rolls, and which carries a substantial part of the weight of the clocking device 10.
• a toothed belt 17 is fastened in that it is clamped over the entire length by means of a counter rail 18 between the latter and the clock running rail 16 on a strip area facing away from the clock device 10 and is thus fastened.
• On The strip area 20 closer to the clock device 10 is exposed for the engagement of the toothed disk 14.
• the lock slide arrangement 19 is moved back and forth over the needle bed 2 by means of the drive toothed belt 7. Since the clock device 10 is also connected via the joint 8 to the driver part ⁇ and thus to the drive * toothed belt 7, the clock device 10 is also moved during the reciprocating movement of the carriage 1. The impeller 12 rolls on the top of the clock running track 16. At the same time, the toothed disk 14 of the clocking device 10 is rotated, since the clock disk 14 is in engagement with the free strip area 20 of the toothed belt 17.
• the mode of operation of the clock generator 10 is not the subject of the present invention and also represents a general state of the art, a detailed description of the same and its mode of operation is dispensed with in this context.
• the clock generator unit has, for example, an angle encoder, which generates needle clock pulses in a needle-synchronized manner, which are provided to an electronic control circuit of the flat knitting machine for control purposes.
• an angle encoder which generates needle clock pulses in a needle-synchronized manner, which are provided to an electronic control circuit of the flat knitting machine for control purposes.
• a wide variety of types and embodiments can be selected as clock devices.
• the timing device 10 can be changed in height with respect to the lock slide arrangement 19 in that a swivel joint 8 is provided, on which an articulated arm 11 is rotatably mounted, on the " end of which is remote from the swivel joint 8, the timing device assembly 10 is fastened. Due to the fact that the timing device 10 in this way height adjustable with the lock carriage arrangement is connected, the vertical distance between the slide guide and / or running rail 3 and the toothed belt 17 is not critical. This means that even if the slide guide and / or running rail 3 does not have a constant distance from the tooth element 17 over the entire length of the flat knitting machine, a safe and reliable function of the timing device 10 is ensured.
• the toothed disk 14 is decoupled in height from the lock slide arrangement and thus from the slide guide and / or slide rail 3.
• the turntable 14 therefore engages securely and evenly with its teeth in the toothed belt 17. There is also no risk that the turntable 14 is pressed too hard on the toothed belt 17, which would result in higher wear and storage problems.
• the task can also be solved by an elastic element, such as a spring telescopic element or a pneumatic element.
• an elastic element such as a spring telescopic element or a pneumatic element.
• the clock device 10 is fastened on the upper part of a pneumatic or spring telescopic element rigidly attached in the direction of slide travel, so that the clock unit 10 and thus the toothed disk 14 are at a different height distance between
• Lock slide assembly 19 or slide guide and / or track 3 on the one hand and toothed belt 17 on the other hand can adapt.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Knitting Machines (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6373997

Family Applications (1)

Country Status (3)

Families Citing this family (2)

Family Cites Families (4)

• 1989
  • 1989-02-14 DE DE19893904306 patent/DE3904306A1/de active Granted
• 1990
  • 1990-01-05 EP EP19900901580 patent/EP0458793A1/de not_active Withdrawn
  • 1990-01-05 WO PCT/EP1990/000021 patent/WO1990009476A1/de not_active Application Discontinuation

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events