US3748872A - Needle bed racking mechanism in a flat knitting machine - Google Patents

Needle bed racking mechanism in a flat knitting machine Download PDF

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Publication number
US3748872A
US3748872A US00219483A US3748872DA US3748872A US 3748872 A US3748872 A US 3748872A US 00219483 A US00219483 A US 00219483A US 3748872D A US3748872D A US 3748872DA US 3748872 A US3748872 A US 3748872A
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United States
Prior art keywords
racking
cam
block
shogging
racking cam
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US00219483A
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English (en)
Inventor
W Hadam
A Muller
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H Stoll GmbH and Co KG
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H Stoll GmbH and Co KG
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Publication date
Application filed by H Stoll GmbH and Co KG filed Critical H Stoll GmbH and Co KG
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Publication of US3748872A publication Critical patent/US3748872A/en
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B7/00—Flat-bed knitting machines with independently-movable needles
    • D04B7/04—Flat-bed knitting machines with independently-movable needles with two sets of needles

Definitions

  • ABSTRACT A racking cam for producing needle bed shogging steps of respectively different extents in a flat knitting machine.
  • a racking cam carrier carries about its periphery a racking carn having a plurality of shogging positions.
  • Each shogging position includes a device for varying the form of the cam at that position.
  • the device may include a block on the periphery of the racking cam carrier and forming a part of the racking cam at each shogging position.
  • This block may be mounted by a connecting structure including an eccentric element such that movement of this eccentric element moves the block in a direction generally parallel to the axis of rotation of the racking cam carrier.
  • This invention relates to a needle bed racking, i.e. shogging, mechanism in a flat knitting machine equipped with a racking cam for producing needle bed shogging steps of respectively different extents.
  • Shogs of the needle bed to required extents are usually effected with the assistance of continuously rotating cam tracks which, for instance, are either formed on the racking carriage by an oblique straight edge or defined by a helical line on a rotatable racking cam carrier.
  • the shogging strokes in such prior mechanisms could be corrected by a variation in the amount of movement of the racking carriage or degree of movement of the rotating cam carrier per shog, for example by driving the carriage or the rotary cam by stepped motors at an appropriate stepdown ratio, or by varying the gradient of the racking cam.
  • each control means may be in the form of a block which is inserted into and is movable relatively to the cam carrier for adjustment through the medium of an eccentric.
  • control blocks are of the same width as a part of the racking cam carrier constituting the actual racking cam, each such block being formed with a groove which extends parallel to the edges of the racking cam and transversely with respect to the direction of shogging of the needle bed and accomodating a bored block member having a hole serving to locate, with a close working fit, an eccentric flange on a central boss which is arranged for turning movement adjustably within the racking cam carrier and is adapted to be secured in position, after an adjustment, by means of a tighting screw.
  • each central boss has a transverse slot in which a screwdriver can be inserted, and the corresponding bored block is provided around the edge of the hole therein with an annular scale designed to indicate the degree of adjustment of the boss.
  • the invention can be used with any type of racking cam carrier, that is to say both a known form of racking straight edge or a known form of rotary racking body.
  • a control block is provided for each needle bed shogging position of the racking cam and this block can be set to a required corrected shogging position independently of the other control blocks and will determine the exact degree of shogging of the needle bed for the racking steps concerned.
  • FIG. 1 is an elevational view, as seen in the axial direction, of a rotatable type racking cam constructed to include the features of the present invention.
  • FIG. 2 is a sectional view taken along line 11-11 of FIG. 1.
  • FIG. 3 is a partial development of the racking cam of FIG. 1 on the racking cam carrier, this development spanning three successive racking steps.
  • FIG. 4 is a detailed sectional view taken along the line IVIV of FIG. 3 and drawn on an enlarged scale.
  • a racking cam carrier which is in the form of a rotatable body known per se.
  • This carrier has a racking cam constituted by a helically-extending edge 12 of a flange 11 on a cam plate 100.
  • the racking cam carrier 10 is mounted on a shaft 30 which extends parallel to the needle bed and constitutes a part of the racking assembly of the machine operable at the dictates of a control mechanism.
  • the flange ll of the cam plate 10a of carrier 10 is provided in and around its periphery with regularly spaced transverse grooves 13 which extend parallel to the direction of racking of the needle bed and correspond in each case to the racking of the needle bed to the extent of one needle.
  • a control block 14 is fitted accurately into each of these transverse grooves 13, each such block being of the same width as the flange 11 and having the same gradient, i.e. angle of obliquity, as the latter relative to the direction of racking.
  • These blocks 14 are each provided with a transverse groove 15 extending parallel to the helical edges 12 of flange 11. Where there are severe inclinations in the racking curve represented by the edges 12 the grooves 15 in the blocks 14 may even be disposed transversely with respect to the rotary axis a of the carrier 10.
  • each control blcok l4 Fitted into the transverse groove 15 of each control blcok l4 is a counter-bored block member 16 having therein a circular hole I6 to accomodate, with a close working fit, an eccentric flange 17 on a central boss 18.
  • This boss 18 is mounted within a hole 19 in the cam plate 10a which latter is formed integrally with the racking cam carrier 10.
  • the inner end of the mounting hole 19 terminates in a co-axial threaded bore 20 in the cam plate 10a, and a tightening screw 21 concentric with the central boss 18 is screwed into the said bore 20.
  • the eccentric flange 17 of boss 18 has formed therein a transverse slot 22 for the insertion of the bit of a screwdriver, and a scale 23, is marked on the block member 16 around the edge of the hole 16' therein accomodating the said flange.
  • the corresponding boss 18 can be turned by a screwdriver inserted into the slot 22.
  • the relevant bored block member 16, together with the block 14 into which it is fitted can be shifted in one or other direction parallel both to the direction of racking of the needle bed and also to the rotational axis a of the cam carrier 10 so that such block 14 will project over one or other of the two edges 12 of the flange ll.
  • Positioning of the slot 22 relatively to the scale marking 23 on block member 16 enables the degree of adjustment of the corresponding control block 14 to be determined and controlled.
  • This shifting of a control block 14 varies the extent of the shog in a racking stage of the needle bed which is determined by the position of the racking cam on which the said block is located. This enables the differing values to be given to the racking stage shogs for the differing shogging stages, one of the control blocks 14 being associated with each such stage.
  • a flat knitting machine having a racking cam means for producing needle bed shogging steps comprising, a racking cam carrier, a racking cam mounted on the racking cam carrier and extending in a generally oblique direction relative to the direction of racking, the racking cam including a plurality of shogging step positions spaced therealong, and control means for varying the extent of shogging at each shogging step position of the racking cam means said control means comprising the construction in which said cam includes a block at each shagging step position, the surface of the block forming the form of the cam at that shogging step position, each block being adjustable relative to the racking cam carrier and independently of the blocks at the other shogging step positions in a direction generally parallel to the direction of racking of the racking cam carrier.
  • each block being mounted on the racking cam carrier by connecting means which includes an eccentric element, the turning of which element adjusts that block in said direction.
  • each such block being formed with a groove which extends parallel to the edges of the racking cam and transversely with respect to the direction of shagging of the needle, a bored member accomodated in said groove and including a hole passing therethrough which locates, with a close working fit, an eccentric flange on a central boss, said eccentric flange constituting the said eccentric element and being arranged for turning movement adjustably within the racking cam carrier to move the bored member and hence the block in said direction to adjust the block.
  • each eccentric flange has a transverse slot adapted to receive a screwdriver or the like for turning it, and its corresponding bored member is provided around the edge of the hole therein with an annular scale designed to indicate the degree of adjustment of the eccentric flange and hence also the degree of adjustment of the block.
  • a racking cam mechanism for use in a flat knitting machine comprising: a racking cam carrier having a racking cam mounted thereon and extending in an oblique direction relative to the direction of racking, said racking cam including a plurality of discrete opposite shogging positions spaced therealong, the racking cam, at each of said positions, including a control means for varying the form of the cam thereat independently of the form of the cam at the other shogging position.
  • said control means comprising the construction in which said cam includes a block at each shogging position, the surface of the block forming the form of a cam at that position, each block being adjustable relative to the racking cam carrier in a direction generally parallel to the direction of racking of the racking cam carrier, each block being the same width, taken in said direction of racking, as the racking cam, each such block being formed with a groove which extends parallel to the edge of the racking cam, a bored member accom' modated in said groove and including a hole passing therethrough which locates, with a close working fit, an eccentric flange on a central boss, said eccentric flange being arranged for turning movement adjustably within the racking cam carrier to move the bored member and hence the block in said direction of racking to adjust the block.
  • a racking cam mechanism including a screw passing through the eccentric flange and central boss and threadedly engaged with respect to the racking cani carrier such that when screwed inwardly with respect to the racking cam carrier it secures in place the eccentric flange and central boss and, hence also the bored member and the said block, each eccentric flange having a transverse slot adapted to receive a screwdriver of the like for turning it, and its corresponding bored member being provided around the edge of the hole therein with an annular scale designed to indicate the degree of adjustment of the eccentric flange, and hence also the degree of adjustment of the block.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
US00219483A 1971-01-20 1972-01-20 Needle bed racking mechanism in a flat knitting machine Expired - Lifetime US3748872A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2102450A DE2102450C3 (de) 1971-01-20 1971-01-20 Einrichtung zum Nadelbettenver satz fur Flachstrickmaschinen

Publications (1)

Publication Number Publication Date
US3748872A true US3748872A (en) 1973-07-31

Family

ID=5796342

Family Applications (1)

Application Number Title Priority Date Filing Date
US00219483A Expired - Lifetime US3748872A (en) 1971-01-20 1972-01-20 Needle bed racking mechanism in a flat knitting machine

Country Status (7)

Country Link
US (1) US3748872A (enExample)
JP (1) JPS5225462B1 (enExample)
CH (1) CH526660A (enExample)
DE (1) DE2102450C3 (enExample)
FR (1) FR2122881A5 (enExample)
GB (1) GB1320477A (enExample)
IT (1) IT943998B (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4022033A (en) * 1975-03-26 1977-05-10 Universal Maschinenfabrik Dr. Rudolf Schieber Kg Shift device for the needle bed of a straight knitting machine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6056822B2 (ja) * 1979-07-12 1985-12-12 株式会社島アイデア・センタ− 横編機におけるラツキング装置
US4616558A (en) * 1984-11-01 1986-10-14 Total Air, Inc. Gaseous fluid distribution devices

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US943921A (en) * 1909-12-21 Dubied & Cie Sa E Racking device for flat-bed knitting-machines.
US2110915A (en) * 1936-07-27 1938-03-15 Raymond S Nogler Knitting machine
CH217747A (de) * 1940-10-24 1941-11-15 Trueby & Flamm Strickmaschine mit verstellbarem Nadelbett.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US943921A (en) * 1909-12-21 Dubied & Cie Sa E Racking device for flat-bed knitting-machines.
US2110915A (en) * 1936-07-27 1938-03-15 Raymond S Nogler Knitting machine
CH217747A (de) * 1940-10-24 1941-11-15 Trueby & Flamm Strickmaschine mit verstellbarem Nadelbett.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4022033A (en) * 1975-03-26 1977-05-10 Universal Maschinenfabrik Dr. Rudolf Schieber Kg Shift device for the needle bed of a straight knitting machine

Also Published As

Publication number Publication date
FR2122881A5 (enExample) 1972-09-01
DE2102450B2 (de) 1973-02-15
CH526660A (de) 1972-08-15
JPS5225462B1 (enExample) 1977-07-07
GB1320477A (en) 1973-06-13
DE2102450C3 (de) 1973-09-13
IT943998B (it) 1973-04-10
DE2102450A1 (de) 1972-08-10

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