Classifications

• • 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
  • D04B15/32—Cam systems or assemblies for operating knitting instruments

Definitions

• the invention relates to a knitting machine with at least one bed with ribs between which knitting means are situated free to move and coupled with needle cams serving to control them, each of them consisting of at least one needle cam section, with needle cams arranged on at least one needle cam carrier arranged at a fixed distance from the bed on at least one carrier of needle cam blocks and fitted with attachment and positioning means for fixing the needle cam sections and for keeping the position of the needle cam sections in relation to the stationary and/or movable part of the needle cam carrier, said attachment and positioning means permitting in the dismantled state of the needle cam carrier to mount and/or to remove the needle cam sections from the front side of the needle cam carrier.
• Knitting machines can be fitted with various needle cam arrangements which can consist each of one or more than one needle cam sections.
• the needle cam sections are mounted fixed or even exchangeably on a needle cam carrier and form on the front side of the needle cam carriers a closed groove-shaped path for the butts of the knitting means, or also the needle cam sections form a needle cam path controlled by the motion of the knitting means.
• a combined solution is also well-known.
• the fixing means of the needle cam sections consist as a rule of holes fitted with threads in the front side of the needle cam carrier and of bolts passing through the holes in the needle cam parts and used to fix the needle cam sections to the needle cam carrier.
• the needle cam sections are analogically fixed to the movable parts of the needle cam carriers so as to permit for instance to adjust the loop length (DE 2245416, DE 3002540, DE 3104298, EP 0348896).
• the movable part of the needle cam carrier is as a rule situated in a tight guiding parallel with the bed.
• the needle cam sections are mounted on the needle cam carrier movable parts adapted to move in the direction parallel to the bed with knitting means or in the direction normal to the bed.
• the shifting of the needle cam sections into the required position will change their action on the knitting means and consequently also the knit structure.
• this invention does not relate to the machines arranged in this way.
• the needle cam sections are freely seated on a sliding guide without the use of attachment means, and their movement in the direction normal to the bed is limited on the one side by the needle cam carrier and on the other side by the bed ribs or by the knitting means (DE 3937390).
• the drawback of this arrangement consists in high requirements placed on the precision, parallelism, and length, of the sliding seat for the needle cam sections which are indispensable to prevent the needle cam sections from getting stuck during their motion in the direction normal to the bed.
• Another drawback of the free seating of the needle cam sections on the needle cam carriers without attachment means consists in the risk that a drop in caution during their assembly can let the needle cam sections fall out of the sliding guide.
• a possible protection of the needle cam sections against falling out by increasing the length of the sliding guide becomes inefficient in some positions of the needle cam carrier, and locking the needle cam sections by springs on the principle of a well-known type of connector increases the production costs.
• the invention intends to eliminate the above drawbacks of the known arrangements of knitting machines with needle cam sections while permitting easy handling of the needle cam block with mounted needle cam sections in any position without the risk for the needle cam section to fall out before the needle cam carrier has been mounted on the machine.
• the goal of the invention has been reached by a knitting machine making use of the fact that during the knitting the needle cam sections are exposed to forces acting in a plane substantially parallel with the front side of the needle cam carrier so that the attachment of the needle cam sections on the needle cam carrier is sufficiently provided for by at least one shifting attachment means arranged substantially parallel to the front side of the needle cam carrier while the fixing of the position of the needle cam sections in relation to the needle cam carrier is provided for by at least one positioning means arranged substantially normal to the front side of the needle cam carrier.
• the shifting attachment means is preferably shaped longitudinally and is inserted by shifting into the passage made in the needle cam sections and in the needle cam carrier.
• the needle cam sections are held in due position in relation to the needle cam carrier by at least one positioning means arranged substantially normal to the front side of the needle cam carrier.
• the needle cam sections are inserted in the positioning means in the direction substantially normal to the front side of the needle cam carrier while at least one shifting attachment means is inserted in the direction parallel with the front side and thus quickly and easily locks the needle cam sections on the needle cam carrier which is then together with the mounted needle cam section in its turn mounted on the machine in a well-known manner. This permits to obtain quick and easy mounting
• Fig. 1 is a radial section through the needle cam system and bed of a circular knitting machine with the arrangement of the needle cam sections according to the invention
• Fig. 2 a detail of the arrangement of the shifting attachment means and of the needle cam sections
• Fig. 3a a view of the front side of the needle cam carrier with mounted needle cam sections held by the flat elastic shifting attachment means and held in due position by positioning means
• Fig. 3b a cross section A-A through the needle cam carrier with mounted needle cam sections and with the shifting attachment means inserted into the passage made by pins in the needle cam sections and in the movable part of the needle cam carrier
• Fig. 1 is a radial section through the needle cam system and bed of a circular knitting machine with the arrangement of the needle cam sections according to the invention
• Fig. 2 a detail of the arrangement of the shifting attachment means and of the needle cam sections
• Fig. 3a a view of the front side of the needle cam carrier with mounted needle cam sections held by the flat elastic shifting attachment means and held in due position by
• FIG. 4 a longitudinal section A through the needle cam carrier with mounted needle cam sections held in due position by the positioning means and attached to the needle cam carrier by a shifting attachment means circular-shaped in section
• Fig. 4b a cross section A-A through the needle cam carrier with the needle cam sections arranged as shown in Fig. 4a
• Fig. 5a a broken- out longitudinal section through the needle cam carrier with the needle cam sections and with the shifting attachment means in the passage, consisting of projections on the needle cam sections and on the needle cam carrier, for the shifting attachment means
• Fig. 5b a cross section A-A through the needle cam carrier with the needle cam sections arranged as shown in Fig. 5a, Fig.
• FIG. 6a a broken-out longitudinal section through the needle cam carrier with the needle cam sections and with the shifting attachment means in the passage for the shifting attachment means consisting of parts of a T-shaped groove
• FIG. 6b a cross section A-A through the needle cam carrier with the needle cam sections arranged as shown in Fig. 6a
• Fig. 7a a view of a part of the needle cam carrier with a mounted needle cam section rotatably mounted on the positioning means consisting of a pin and with the shifting attachment means adapted to be inserted from the lateral side of the needle cam carrier
• Fig. 7b a longitudinal section A-A through the arrangement shown in Fig. 7a with the positioning means situated on the moving and on the stationary part of the needle cam carrier
• Fig. 7a a broken-out longitudinal section through the needle cam carrier with the needle cam sections and with the shifting attachment means in the passage for the shifting attachment means consisting of parts of a T-shaped groove
• Fig. 6b a cross section A-A through the needle cam carrier with the
• FIG. 8a a needle cam carrier with the needle cam sections mounted on the movable part of the needle cam carrier
• Fig. 8b a cross section through the arrangement shown in Fig. 8a
• Fig. 9 a needle cam carrier with mounted stationary needle cam sections position-determined by a groove provided in the stationary part of the needle cam carrier
• Fig. 9a a cross section B-B through the arrangement shown in Fig. 9, Fig. 9b an oblique section A-A through the arrangement shown in Fig. 9 in the direction normal to the shifting direction of the obliquely shifting attachment means
• Fig. 9c a detail of the arrangement shown in Fig. 9 with the positioning means made as a pin entering the groove provided on the movable part of the needle cam carrier
• Fig. 9c a detail of the arrangement shown in Fig. 9 with the positioning means made as a pin entering the groove provided on the movable part of the needle cam carrier
• FIG. 10 a detail of the needle cam carrier with a mounted stationary needle cam section and with an obliquely moving needle cam section with a positioning guide arranged on the stationary needle cam section, Fig. 10a a cross section A-A through the arrangement shown in Fig. 10, Fig. 10b a longitudinal section B-B through the arrangement shown in Fig. 10 in the area of the obliquely shifting needle cam section,
• Fig. 11 a detail of the needle cam carrier with the mounted stationary needle cam section position-determined by positioning means situated on the stationary needle cam section and held in position by attachment means provided on the stationary needle cam section, Fig. 11 a an oblique section A-A through the arrangement shown in Fig. 11 in the direction normal to the direction of the motion of the obliquely moving needle cam section, and Fig. 11b a longitudinal section B-B through the arrangement shown in Fig. 11 in the direction of the axis of the movable part of the needle cam carrier.
• Fig. 1 in a cross section as a needle cam system in the area of a circular cylindrical needle bed 6 showing the details required for explaining the principle of the invention.
• the machine carries a needle cam section block carrier 1 having fixed thereto with screws 13 at least one stationary part 2 of the needle cam carrier in which there is arranged in a guide parallel with ribs 6a of the needle bed 6 a movable part 3 of the needle cam carrier fitted with positioning means 20 arranged substantially normal to a front side 2 ⁇ of the needle cam carrier.
• the positioning means 20 hold needle cam sections 4 in due position in the direction parallel with the ribs 6a of the needle bed 6.
• Side walls 22 of the movable part 3 of the needle cam carrier hold the needle cam sections 4 in due position in the sense of rotation of the needle bed 6 rotating in a well-known manner and moving in the direction normal to the plane of representation of Fig. 1.
• a passage 24 consisting of pins 18 and 19 alternately arranged on the movable part 3 of the needle cam carrier and on the needle cam sections 4 carries inserted therein a shifting attachment means 5 made in a preferred embodiment as a flat member elastic in the direction normal to its longitudinal axis and elastically deflected by the pins 18 in the direction towards, and by the pins 19 away from, the front side 21 of the needle cam carrier while being inserted into the passage 4.
• the shifting attachment means 5 is particularly advantageous in that, due to its transversal elasticity, it holds (presses) the needle cam sections 4 onto the front side 21 of the needle cam carrier with a defined force not preventing the movement of the needle cam sections 4 along the side wall 21 of the stationary part 2 of the needle cam carrier for instance when adjusting the stitch length by means of an adjusting screw 10 whose taper section 23 serves as a stop for the movable part 3 of the needle cam carrier pressed onto it by a value defining spring 11..
• the value defining spring 11 moves the movable part 3 of the needle cam carrier in parallel with the ribs 6a upwards to a cover sheet 16.
• the taper section 23 of the adjusting screw 10 moves the movable part 3 of the needle cam carrier in the opposite direction, i.e., downwards.
• the needle cam carrier is at this stage protected against falling out of the guide by a pin 15 and the range of motion is limited from the upper side of the movable part 3 of the needle cam carrier by the cover sheet 16, and from the lower side of the movable part 3 of the needle cam carrier, by a defining cube 12 seated in the stationary part 2 of the needle cam carrier.
• the position of the needle cam carrier is defined by a positioning pin 14 inserted in a groove acting as a guide of the movable part 3 of the needle cam carrier situated in the stationary part 2 of the needle cam carrier.
• the position of the movable part 3 of the needle cam carrier can be adjusted in another suitable manner, for instance by replacing the adjusting screw by a cylindrical pin equipped on its front side with a spiral-shaped groove cooperating with a pin situated on the movable part
• Fig. 2 shows in detail the attachment of the needle cam sections 4 by means of the elastic shifting attachment means 5.
• Fig. 3a shows the needle cam carrier in arrangement shown in Fig. 1 as viewed from the front side 21 of the needle cam carrier with the mounted needle cam sections 4.
• Fig. 3b shows a cross section through the arrangement of the needle cam carrier of Fig. 1 with the stationary part 2 and with the movable part 3 of the needle cam carrier with the installed needle cam section 4, and the pin 19 arranged in the needle cam section 4 and making a part of the passage 24 for the flat shifting attachment means 5.
• Figs. 4a and 4b show respectively a longitudinal and a cross section of another arrangement according to the invention in which the shifting attachment means 5 consists of a wire circular in cross section and the passage 24 for the shifting attachment means consists of orifices alternately provided in the needle cam sections
• the adjustment of the movable part 3 of the needle cam carrier is in the shown example of embodiment made as a cylindrical stop pin 25 having at its front a spiral-shaped groove adapted to receive an adjusting pin 26 situated on the movable part 3 of the needle cam carrier.
• Figs. 5a, 5b, 6a, 6b show other embodiments of the passage 24 for the shifting attachment means 5.
• the passage 24 for the shifting attachment means 5 consists of projections 27, 28, alternately arranged on the needle cam carrier and on the needle cam sections 4 and so bent that their end arms are oriented in opposite directions.
• Figs 6a, 6b show respectively a longitudinal and a cross section through an arrangement in which the needle cam carrier and the needle cam sections are alternately equipped with T-shaped grooves 29 and 30 making up the passage 24 for the shifting attachment means 5.
• each of these two examples of embodiment preferably uses a flat and elastic shifting attachment means 5.
• the passage 24 for the shifting attachment means 5 can consist of a suitable combination of suitable projections, suitable groove sections of suitable profile such as T-profile, suitable pins, etc.
• Figs. 7a, 7b show the needle cam section 4 with positioning means consisting of a pin 31 situated in the stationary part 2 of the needle cam carrier and of a pin 32 inserted into the movable part 3_of the needle cam carrier made as an adjusting (setting) pin 25 with a groove on its front side.
• the embodiment of the passage 24 for the shifting attachment means 5 which is inserted from the lateral side of the needle cam carrier is shown in Fig. 7b and consists of the projections 27, 28 alternately arranged on the needle cam carrier and on the needle cam section 4.
• the shifting attachment means 5 holds the needle cam section 4 rotatably mounted on the pin 3 . on the front side 21 of the needle cam carrier. Due to its spiral-shaped groove, the rotation of the adjusting (setting) pin 25_is transmitted in a way on the pin 32 and via the latter on the needle cam section 4 whose position, and consequently the stitch length of the knitwear, can be adjusted in this manner.
• Fig. 8a shows in front view another example of embodiment of the invention, and Fig. 8b, a cross section through it.
• each needle cam consists of a stationary needle cam section 40 and of a moving needle cam section 41 situated next to it.
• the stationary needle cam sections 40, held by the shifting attachment means 5, are situated on the stationary part 2 of the needle cam carrier and are held in position, on the one hand, by pins 33 inserted into a groove
• the moving needle cam sections 41. are in the arrangement shown in Figs. 8a, 8b attached and positioned on the movable part 3 of the needle cam carrier similarly to the needle cam sections 4 of the example of embodiment shown in Fig. 1.
• the knit structure can be modified by the exchange of the stationary needle cam sections while the moving needle cam sections 4 are used to adjust the stitch length, so that the exchange of the moving needle cam sections 4 will change the course of the clearing as may be required by the knitting technology (technique).
• FIG. 9, 9a, 9b Another preferred embodiment, shown in Figs. 9, 9a, 9b, uses obliquely shifting moving needle cam sections 37 position-determined by an obliquely positioned groove 370 situated in the front side 21 of the needle cam carrier and receiving a projection 35 situated at the rear side of said obliquely moving shifting needle cam section 37, and the positioning means 20 made as projections on the front side of the movable part 3 of the needle cam carrier.
• the movement of the movable part 3 in the direction of its longitudinal axis displaces the obliquely shifting needle cam section 37 in the direction of the axis of the groove 370.
• Fig. 9c where the positioning means consists of a pin 36 inserted into a groove 360 provided on the movable part 3 of the needle cam section in the direction normal to the longitudinal axis of the movable part 3 of the needle cam carrier.
• This arrangement serves to an easy exchangeability of the obliquely shifting moving needle cam sections 37 and to their joint adjustment, for instance in the well-known multirace knitting machines with the oblique shifting of the needle cam sections forming sinker cams.
• Figs. 9c where the positioning means consists of a pin 36 inserted into a groove 360 provided on the movable part 3 of the needle cam section in the direction normal to the longitudinal axis of the movable part 3 of the needle cam carrier.
• the obliquely shifting moving needle cam sections are positioned by a positioning guide 373 arranged on stationary needle cam sections 40 positioned on the stationary part 2 of the needle cam carrier by positioning means 20 and by the pin 33 situated on the stationary needle cam section 40 inserted into the groove 330 provided on the front side of the stationary part 2 of the needle cam carrier.
• the obliquely shifting needle cam section is positioned by projections 374 on its rear side inserted into a corresponding groove 375 located in the movable part of the needle cam carrier. The longitudinal movement of the movable part 3 results in the oblique movement of the needle cam sections in the direction of the positioning guide 373.
• the moving obliquely shifting needle cam sections 37 are held by means of their holding projections 371 and holding means 372 arranged in the form of a recess on the rear side of the stationary needle cam sections 40 parallel with the positioning guide 373 situated on the stationary needle cam sections 40 and used to set the position of the moving needle cam sections in relation to the stationary part 2 of the needle cam carriers.
• the positioning of the moving obliquely shifting needle cam sections 37 in relation to the movable part 3 of the needle cam carrier is provided for by a projection
• the projection 38 can be substituted with a pin seated in the needle cam section 37 and inserted into the groove 39.
• the stationary needle cam sections 40 used to hold the moving obliquely shifting needle cam sections 37 are in their turn preferably held by a single shifting attachment means 5 arranged in one of the above described variants.
• the positioning guide 373 can be arranged also in a not represented prismatic shape and then substitutes both the holding means 372 for holding and the positioning of the moving obliquely shifting needle cam sections 37.
• the positioning and holding of the stationary needle cam sections can be provided for by a part analogical to the arrangement of the movable part of the needle cam carrier of Fig. 1 , solidly connected with the stationary part 2 of the needle cam carrier.
• the relative arrangement of the positioning means on the needle cam sections and on the needle cam carrier can be opposite to that described above, so that for instance the projection on the needle cam section inserted into the groove on the needle cam carrier can be replaced by the projection on the needle cam carrier inserted into the groove on the needle cam section.
• the pin situated on the needle cam section can be replaced by the pin situated on the needle cam carrier inserted into the groove or into a hole made in the needle cam section.

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

Applications Claiming Priority (3)

Publications (1)

Family

ID=5472936

Family Applications (1)

Country Status (5)

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• 2000
  • 2000-12-29 CZ CZ20004931A patent/CZ291017B6/cs not_active IP Right Cessation
• 2001
  • 2001-12-19 EP EP01272602A patent/EP1354089A1/en not_active Withdrawn
  • 2001-12-19 WO PCT/CZ2001/000076 patent/WO2002053818A1/en not_active Application Discontinuation
  • 2001-12-19 CN CNB018215297A patent/CN100422416C/zh not_active Expired - Fee Related
  • 2001-12-28 TW TW90132717A patent/TW548357B/zh not_active IP Right Cessation

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