EP0748888A1 - Détecteur de position annulaire, notamment pour des machines à tricoter circulaires pour la production de bas - Google Patents

Détecteur de position annulaire, notamment pour des machines à tricoter circulaires pour la production de bas Download PDF

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Publication number
EP0748888A1
EP0748888A1 EP96108430A EP96108430A EP0748888A1 EP 0748888 A1 EP0748888 A1 EP 0748888A1 EP 96108430 A EP96108430 A EP 96108430A EP 96108430 A EP96108430 A EP 96108430A EP 0748888 A1 EP0748888 A1 EP 0748888A1
Authority
EP
European Patent Office
Prior art keywords
ring
machine
rigidly coupled
position transducer
transducer
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
EP96108430A
Other languages
German (de)
English (en)
Other versions
EP0748888B1 (fr
Inventor
Paolo Salucci
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.)
Macchine Tessili Circolari MATEC SpA
Original Assignee
Macchine Tessili Circolari MATEC SpA
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 Macchine Tessili Circolari MATEC SpA filed Critical Macchine Tessili Circolari MATEC SpA
Publication of EP0748888A1 publication Critical patent/EP0748888A1/fr
Application granted granted Critical
Publication of EP0748888B1 publication Critical patent/EP0748888B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D04B15/94—Driving-gear not otherwise provided for
    • D04B15/99—Driving-gear not otherwise provided for electrically controlled

Definitions

  • the present invention relates to an annular position transducer, particularly for a circular knitting machine for manufacturing stockings, a device of the type known by the English term "encoder”.
  • the cycle for producing the stocking is entirely supervised by a unit equipped with a programmable microprocessor; the synchronization between the mechanical part and the electronic part of the machine is entrusted to an encoder, which has the task of checking the position of the needle cylinder in the course of time.
  • the encoder of a commercial type, is installed by means of a coupling at the end of a shaft the axis whereof is different from the axis of the cylinder and is connected kinematically to the cylinder support.
  • a poorly accurate encoder is provided by keying a toothed disk directly on the cylinder support and reading it with one or more optical sensors that are rigidly coupled to a fixed support of the machine; however, this solution has the drawback that it cannot achieve high precision and resolution levels, since fragile and delicate optical components would be located in a region where dirt accumulates: furthermore, maintenance or repair operations as well as tunings of the machine are usually performed in these regions, and one would end up having simultaneous access to components that are mutually incompatible: large and heavy parts, with possibly heavy-duty assembly and disassembly equipment, and small and delicate parts (encoder disks with a resolution of up to 2000 divisions per turn) which require extreme cleanliness, caution, and precision during assembly and disassembly.
  • a principal aim of the present invention is to obviate the above-mentioned drawbacks of known devices, i.e., to provide an annular position transducer, particularly for a circular knitting machine for manufacturing stockings, that can be mounted so that it is axially aligned with the cylinder, allows easy access to the machine for maintenance, has very high precision and resolution, and the delicate components whereof are placed in a protected and easily accessible position.
  • an object of the present invention is to achieve the above aim with a structure that is simple, relatively easy to execute in practice, safe in use, effective in operation, and has a relatively low cost.
  • the present annular position transducer particularly for a circular knitting machine for manufacturing stockings, characterized in that it is constituted by two strong complementary rings having a large diameter that are connected one another by an antifriction bearing and between which an annular chamber is formed; in that the first ring is provided with means for fixing to the rotatable cylinder support of the machine and the second ring is fixed to the fixed supporting frame of the machine; and in that a disk provided with notches is rigidly coupled to the first ring and a module for optically reading the notches is rigidly coupled to the second ring.
  • the reference numeral 1 generally designates an annular position transducer, particularly for a circular knitting machine 2 for manufacturing stockings according to the invention.
  • the circular machine 2 is of a known type and has a fixed support 3, a fixed supporting plate 4, a cylinder 5 for the needles 6, a rotating cylinder support 7, a tube 8 for the passage of the stocking 9, and a lower perforated tube 10 for the passage of the stocking, which is known as an "antitwist"; the support 3 supports the cylinder support 7 by means of bearings 11 and flanges 12.
  • the transducer according to the invention is constituted by two strong and complementary rings 13 and 14 having a large diameter (even more than 70 millimeters) and connected one another by an antifriction bearing 15 that is advantageously of the self-lubricating type with rolling balls.
  • An annular space 16 remains between the rings 13 and 14 and is closed at the bottom by a fixed cover 17.
  • the first ring 13 is provided with means for fixing it to the rotating cylinder support; said means are constituted by a tab 18, an elastic ring 19, a threaded lower ring 20, and a washer 21; the second ring 14 can be rigidly coupled, by means of screws referenced by the axis 22, to the cover 17 and is connected to the fixed supporting frame of the machine by means of a radial arm 23 for adjusting the angular position (adjustment can occur, for example, by fixing the arm to an arc-shaped slot by means of a bolt).
  • a tube 24 is packed together with the rotating ring 13, and a disk 25 is rigidly coupled to said tube; said disk is affected by a plurality of notches (up to two thousand), and a module 26 for optically reading the notches is fixed to the cover; said module is installed in a seat 27 of the second ring 14 and has an optical reading beam the axis whereof is referenced by the line R; the electrical connections of the module 26 exit from a lower tube 28 of the cover.
  • the transducer according to the invention can be arranged above or below the motor and advantageously has a strong structure and delicate optical components which are in a position in which they are protected against impacts and dirt (the entire transducer can be removed as a single, sturdy block, and access to the delicate components can occur after the block has been removed from the machine and taken to an appropriate environment).
  • the first rotating ring 13 might also be formed directly on one of the bases of the rotor of the hollow motor for the actuation of the machine, becoming monolithic with said rotor.
  • a toothed pulley 30 for a toothed transmission belt 31, or a transmission gear that meshes with a driving gear can be rigidly coupled to the first ring 13, for example by means of perimetric screws 29.
  • the transducer allows to directly detect the angular positions of the cylinder with a structure that is rigidly coupled to the cylinder support and therefore without errors due to the mechanical transfer of information.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Treatment Of Fiber Materials (AREA)
EP96108430A 1995-06-13 1996-05-28 Détecteur de position annulaire, notamment pour des machines à tricoter circulaires pour la production de bas Expired - Lifetime EP0748888B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT95BO000298A IT1279945B1 (it) 1995-06-13 1995-06-13 Trasduttore di posizione anulare, particolarmente per macchina circolare per calzetteria
ITBO950298 1995-06-13

Publications (2)

Publication Number Publication Date
EP0748888A1 true EP0748888A1 (fr) 1996-12-18
EP0748888B1 EP0748888B1 (fr) 2002-02-06

Family

ID=11340670

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96108430A Expired - Lifetime EP0748888B1 (fr) 1995-06-13 1996-05-28 Détecteur de position annulaire, notamment pour des machines à tricoter circulaires pour la production de bas

Country Status (3)

Country Link
EP (1) EP0748888B1 (fr)
DE (1) DE69619026T2 (fr)
IT (1) IT1279945B1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101545173B (zh) * 2009-01-20 2011-03-30 张乐武 行星式滚动轴承系统
CN101824700B (zh) * 2010-05-14 2012-03-07 绍兴金昊机械制造有限公司 一种电脑无缝针织内衣机针盘自由悬置可调锁紧装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2266889A1 (fr) * 1974-04-03 1975-10-31 Quick Rotan Becker & Notz Kg
US3996772A (en) * 1970-05-30 1976-12-14 Firma Franz Morat Gmbh Method and device for the electronic control of knitting machines knitting pattern goods
DE3942719A1 (de) * 1988-12-23 1990-06-28 Mitsubishi Electric Corp Stellungserfassungs-vorrichtung
EP0541838A1 (fr) * 1991-11-12 1993-05-19 S.F.I.M. DI LONATI CAV. FRANCESCO & C. SOCIETA' IN ACCOMANDITA SEMPLICE Métier à tricoter circulaire pour la fabrication de chaussettes, bas et leurs pareils

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3996772A (en) * 1970-05-30 1976-12-14 Firma Franz Morat Gmbh Method and device for the electronic control of knitting machines knitting pattern goods
FR2266889A1 (fr) * 1974-04-03 1975-10-31 Quick Rotan Becker & Notz Kg
DE3942719A1 (de) * 1988-12-23 1990-06-28 Mitsubishi Electric Corp Stellungserfassungs-vorrichtung
EP0541838A1 (fr) * 1991-11-12 1993-05-19 S.F.I.M. DI LONATI CAV. FRANCESCO & C. SOCIETA' IN ACCOMANDITA SEMPLICE Métier à tricoter circulaire pour la fabrication de chaussettes, bas et leurs pareils

Also Published As

Publication number Publication date
ITBO950298A0 (it) 1995-06-13
DE69619026T2 (de) 2002-07-18
IT1279945B1 (it) 1997-12-23
EP0748888B1 (fr) 2002-02-06
DE69619026D1 (de) 2002-03-21
ITBO950298A1 (it) 1996-12-13

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