EP2374921A1 - Circular knitting machine Jacquard needle equipped with a return structure - Google Patents
Circular knitting machine Jacquard needle equipped with a return structure Download PDFInfo
- Publication number
- EP2374921A1 EP2374921A1 EP10003725A EP10003725A EP2374921A1 EP 2374921 A1 EP2374921 A1 EP 2374921A1 EP 10003725 A EP10003725 A EP 10003725A EP 10003725 A EP10003725 A EP 10003725A EP 2374921 A1 EP2374921 A1 EP 2374921A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- needle
- jacquard
- return structure
- neck
- force received
- 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.)
- Withdrawn
Links
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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
- D04B15/66—Devices for determining or controlling patterns ; Programme-control arrangements
- D04B15/68—Devices for determining or controlling patterns ; Programme-control arrangements characterised by the knitting instruments used
-
- 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
- D04B15/66—Devices for determining or controlling patterns ; Programme-control arrangements
- D04B15/68—Devices for determining or controlling patterns ; Programme-control arrangements characterised by the knitting instruments used
- D04B15/78—Electrical devices
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
- D04B35/02—Knitting tools or instruments not provided for in group D04B15/00 or D04B27/00
- D04B35/04—Latch needles
Definitions
- the needle selected sheet is driven by the needle-pushing cam in normal conditions so that the knitting needle at the front end of the needle selected sheet hooks and pulls a yarn to form a yarn loop, or at least one needle selected sheet is pushed by the needle selected device to escape from the needle-pushing cam, so that the knitting needle cannot be driven by the needle selected sheet to form the yarn loop.
- the needle selected sheet has the return apparatus that is an elastic plate, an elastic rod or an elastic strut butting the upper needle dial to provide an automatic returning force for the needle butts of the needle selected sheet.
- R.O.C. patent No. 435457 mentioned above has some drawbacks in practice.
- the return apparatus is located on the needle foot of the jacquard needle, this limits the length of the return apparatus, and it also creates a longer movement distance when the jacquard needle is moved downwards.
- the longer movement distance of the return apparatus results in a greater stress it has to withstand. Since the interior space of a circular knitting machine is limited, the thickness of the return apparatus is difficult to increase, thus the lifespan of the return apparatus also is shorter.
- the jacquard needle 2 includes a fulcrum 21, a neck 22, a force received section 24 connected to the neck 22, a needle foot 26 extended from the force received section 24 and the return structure 25.
- the fulcrum 21 is connected with the knitting needle 4.
- the neck 22 is extended from the fulcrum 21.
- the neck 22 is extended upwards to form a shoulder 23 perpendicular to the upper needle dial 5.
- the neck 22 is connected to the force received section 24 through the shoulder 23.
- the force received section 24 is located at a higher horizontal elevation than the neck 22 in the circular knitting machine through the shoulder 23.
- the force received section 24 has a plurality of needle butts 241 depressed by the needle selected sheets 11.
- the force received section 24 also is extended to form the needle foot 26 which is located in a slide track formed on the cam 3 in the normal conditions.
- the return structure 25 is extended from the neck 22 and has a distal end formed a bend end 251 beneath the needle foot 26.
- the return structure 25 is formed at an arch from the neck 22 to the bend end 251.
- the bend end 251 butts an inner wall of the upper needle dial 5.
- the return structure 25 and the force received section 24 are interposed by a retraction gap 27 to provide a movement space for the force received section 24 while depressed by the needle selected sheet 11.
- the shoulder 23 has an arched notch 231 at one end of the retraction gap 27.
- the return structure 25 previously discussed can be an elastic plate, an elastic rod or an elastic strut. While the invention has been described by means of specific embodiments, numerous modifications and variations could be made thereto by those skilled in the art without departing from the scope and spirit of the invention set forth in the claims.
- the present invention provides a significant improvement over the conventional techniques and complies with the patent application requirements, and is submitted for review and granting of the commensurate patent rights.
Abstract
There is disclosed a jacquard needle equipped with a return structure being installed in a circular knitting machine which has a computer needle selected device including plural jacquard needles (2) and plural needle selected sheets (11) on an upper needle dial (5). Each jacquard needle (2) is driven by a cam (3) to move a knitting needle (4). The needle selected sheet (11) depresses the jacquard needle (2) to escape from the cam (3). The jacquard needle (2) includes a fulcrum (21), a neck (22), a force received section (24), a needle foot (26) and a return structure (25). The fulcrum (21) is connected with the knitting needle (4). The needle foot (26) is located in a slide track of the cam (3). The return structure (25) has a bend end (251) at a distal end beneath the needle foot (26). The bend end (251) butts an inner wall of the upper needle dial (5). The force received section (24) transmits the depressing force to bend the return structure (25) to generate a returning elasticity.
Description
- The present invention relates to a circular knitting machine jacquard needle equipped with a return structure and more particularly to a jacquard needle that is driven by a needle selected device in a circular knitting machine to drive a knitting needle in and out.
- A conventional circular knitting machine generally has a needle selected device to form jacquard patterns on the surface of knitting fabrics. Through the needle selected device, a knitting needle can be driven out or in to form a knitted area or an un-knitted area on the fabric. More specifically, the needle selected device includes a plurality of needle selected sheets. Each knitting needle is connected with a jacquard needle. The jacquard needle has a fulcrum latched on the knitting needle and a needle selected section extended from the fulcrum. The needle selected section has a rear end formed a needle foot movable in a track formed by at least one cam. The needle selected section includes a plurality of needle butts. When the needle selected device is moved away from the needle selected sheets, the needle foot can drive the knitting needles outwards to hook and pull a yarn to form a yarn loop according to the track formed by the cam. While the needle selected device drives any one of the needle selected sheets to push the needle butts, the jacquard needle is pushed to escape from the cam, so that the knitting needle cannot be moved out to do knitting. Hence whether a knitting pattern is formed depends on whether the jacquard needle is being pushed by the needle selected device to escape from the cam. The jacquard needle is not driven by the cam, so that the knitting needle cannot be pushed out to do knitting.
- To improve return mechanism of the jacquard needle, Applicant submitted a patent application in 1997 at R.O.C. patent No.
435457 - However, R.O.C. patent No.
435457 - Damage of the jacquard needle creates obvious defects on the knitted fabrics. As the circular knitting machine is quite bulky and consists of a great number of elements, it is difficult to inspect and identify the damaged elements, hence there is still room for improvement in terms of overcoming the wearing and loss problems caused by the return apparatus.
- In view of the problems of the conventional return apparatus that cause severe wearing on the jacquard needles and shorten the life span thereof, the primary object of the present invention is to provide a return structure to push the jacquard needles back without causing heavy wearing and shortening the lifespan thereof.
- The present invention provides a circular knitting machine jacquard needle equipped with a return structure adopted for use on a circular knitting machine. The circular knitting machine includes a plurality of knitting needles which are controlled by a plurality of cams and a plurality of computer needle selected devices. The computer needle selected device includes a plurality of needle selected sheets and a plurality of jacquard needles located on an upper needle dial. The jacquard needles are driven by the cams in normal conditions to drive the knitting needles. The needle selected sheets press the jacquard needles downwards to escape from the cams. Each jacquard needle includes a fulcrum, a neck extended from the fulcrum, a force received section connected to the neck, a needle foot extended from the force received section and a return structure extended from the neck. The jacquard needle is connected with the knitting needle through the fulcrum so that movement of the jacquard needle drives the knitting needle. The force received section has a plurality of needle butts pressed by the needle selected sheets and the needle foot is extended from the force received section. The needle foot is located in a slide track formed on the cam in normal conditions. The return structure has a distal end with a bend end formed thereon beneath the needle foot. The bend end butts an inner wall of the upper needle dial. The return structure and the force received section are interposed by a retraction gap to provide a movement space for the force received section while depressed by the needle selected sheet. The neck transmits the depressed force to bend the return structure and generate an elastic force to rebound the force received section to return back.
- By means of the structural change of the jacquard needle and alteration of connecting position of the return structure, the stress born by the jacquard needle is reduced obviously, and the returning elasticity does not directly apply to the force received section, thus impact of the force received section against the cams during rebounding also is alleviated. As a result, the return function is achieved and the lifespan of the jacquard needles also is longer.
- The foregoing, as well as additional objects, features and advantages of the invention will be more readily apparent from the following detailed description, which proceeds with reference to the accompanying drawings.
-
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FIG. 1 is a perspective view of the computer needle selected device and knitting needles. -
FIG. 2 is a schematic view of a jacquard needle and a knitting needle in a first condition. -
FIG. 3 is another schematic view of a jacquard needle and a knitting needle in the first condition. -
FIG. 4 is a schematic view of a jacquard needle and a knitting needle in a second condition. -
FIG. 5 is another schematic view of a jacquard needle and a knitting needle in the second condition. - Please refer to
FIGS. 1 ,2 and3 for a circular knitting machine jacquard needle equipped with a return structure according to the invention. The circular knitting machine includes a plurality of computer needle selected device and a plurality ofcams 3 to drive a plurality of knittingneedles 4 in and out to knit yarn loops on a fabric as desired. Operation of the knittingneedles 4 is controlled by the computer needle selected device andcams 3. The computer needle selected device includes a plurality of needle selectedsheets 11 located on a needle selected device body 1 and a plurality ofjacquard needles 2 located on anupper needle dial 5. Eachjacquard needle 2 has one end connected with one knittingneedle 4 to be moved together and the other end is driven by thecam 3 in normal conditions (a first condition) to drive the knittingneedle 4 to move. The needle selectedsheet 11 on the needle selected device body 1 depresses downwards to press the jacquard needle 2 (referring toFIG. 4 ) and push thejacquard needle 2 to escape from thecam 3 to free the control thereof (a second condition), therefore thejacquard needle 2 and knittingneedle 4 stop operating. To enable thejacquard needle 2 to automatically rebound back and return to a track formed on thecam 3 after being depressed by the needle selectedsheet 11, thejacquard needle 2 has areturn structure 25 to provide returning elasticity. Please refer toFIGS. 1 ,2 and3 for the detailed structure of thejacquard needle 2. As shown inFIGS. 2 and3 , thejacquard needle 2 includes a fulcrum 21, aneck 22, a force receivedsection 24 connected to theneck 22, aneedle foot 26 extended from the force receivedsection 24 and thereturn structure 25. Thefulcrum 21 is connected with theknitting needle 4. Theneck 22 is extended from thefulcrum 21. Theneck 22 is extended upwards to form ashoulder 23 perpendicular to theupper needle dial 5. Theneck 22 is connected to the force receivedsection 24 through theshoulder 23. The force receivedsection 24 is located at a higher horizontal elevation than theneck 22 in the circular knitting machine through theshoulder 23. The force receivedsection 24 has a plurality of needle butts 241 depressed by the needle selectedsheets 11. The force receivedsection 24 also is extended to form theneedle foot 26 which is located in a slide track formed on thecam 3 in the normal conditions. Thereturn structure 25 is extended from theneck 22 and has a distal end formed abend end 251 beneath theneedle foot 26. Thereturn structure 25 is formed at an arch from theneck 22 to thebend end 251. Thebend end 251 butts an inner wall of theupper needle dial 5. Moreover, thereturn structure 25 and the force receivedsection 24 are interposed by aretraction gap 27 to provide a movement space for the force receivedsection 24 while depressed by the needle selectedsheet 11. Theshoulder 23 has anarched notch 231 at one end of theretraction gap 27. Referring toFIGS. 4 and5 , the needle selected device body 1 drives the needle selectedsheet 11 downwards to press the needle butts 241 on the force receivedsection 24, the force receivedsection 24 sinks to theretraction gap 27 to make theneedle foot 26 to escape from the track formed on thecam 3 so that thejacquard needle 2 andknitting needle 4 stop moving in and out. Sinking of the force receivedsection 24 transmits the depressing force through theneck 22 to bend thereturn structure 25 to generate an elastic force. When the force receivedsection 24 of thejacquard needle 2 is no longer depressed by the needle selectedsheet 11, the elastic force generated by thereturn structure 25 rebounds the force receivedsection 24 back so that theneedle foot 26 returns to the normal location driven by thecam 3, and thejacquard needle 2 andknitting needle 4 can be driven by thecam 3 to move in and out continuously. - Compared with the conventional return structure, the invention provides many different features: first, the
return structure 25 of the invention is not directly connected to the force receivedsection 24 but connected to theneck 22, and the force receivedsection 24 is connected to theneck 22 through theshoulder 23, hence the force receivedsection 24 and thereturn structure 25 are connected to theneck 22 like a bifurcated fork so that the downward pressure of the force receivedsection 24 and the elasticity of thereturn structure 25 can be buffered through theneck 22 without directly applying to thereturn structure 25 or force receivedsection 24. Thereturn structure 25 is connected to theneck 22 and thebend end 251 is extended beneath theneedle foot 26, hence the length of thereturn structure 25 is obviously increased in an arched manner. As a result, stress occurred to thereturn structure 25 resulted from depressing or releasing the elasticity is much lower, and the lifespan also is longer. The aforesaid feature can alleviate the pressure and elasticity to prevent theneedle foot 26 from hitting thecam 3 during returning and avoid damage. Moreover, with thearched notch 231 formed on theshoulder 23 towards theretraction gap 27, the inner edge of thearched notch 231 can disperse the received force during sinking of the force receivedsection 24 to mitigate metal fatigue of theshoulder 23 orneck 22 after used for a long-term period of time. In short, thejacquard needle 2 of the invention provides the force receivedsection 24,return structure 25,neck 22 andshoulder 23 to obviously reduce stress after long time of use. Not only theneedle foot 26 is equipped with return function, wearing of thereturn structure 25 can be avoided to enhance the lifespan of thejacquard needle 2. - The
return structure 25 previously discussed can be an elastic plate, an elastic rod or an elastic strut. While the invention has been described by means of specific embodiments, numerous modifications and variations could be made thereto by those skilled in the art without departing from the scope and spirit of the invention set forth in the claims. - In summary there is disclosed a jacquard needle equipped with a return structure being installed in a circular knitting machine which has a computer needle selected device including plural jacquard needles 2 and plural needle selected
sheets 11 on anupper needle dial 5. Eachjacquard needle 2 is driven by acam 3 to move aknitting needle 4. The needle selectedsheet 11 depresses thejacquard needle 2 to escape from thecam 3. Thejacquard needle 2 includes a fulcrum 21, aneck 22, a force receivedsection 24, aneedle foot 26 and areturn structure 25. Thefulcrum 21 is connected with theknitting needle 4. Theneedle foot 26 is located in a slide track of thecam 3. Thereturn structure 25 has abend end 251 at a distal end beneath theneedle foot 26. Thebend end 251 butts an inner wall of theupper needle dial 5. The force receivedsection 24 transmits the depressing force to bend thereturn structure 25 to generate a returning elasticity. - In summation of the above description, the present invention provides a significant improvement over the conventional techniques and complies with the patent application requirements, and is submitted for review and granting of the commensurate patent rights.
Claims (5)
- A circular knitting machine jacquard needle equipped with a return structure installed in a circular knitting machine which includes a plurality of knitting needles (4) controlled by a plurality of cams (3) and a plurality of computer needle selected device which includes a plurality of needle selected sheets (11) and a plurality of jacquard needles (2) located on an upper needle dial (5); the jacquard needles (2) are driven by the cams (3) in normal conditions to move the knitting needles (4), the needle selected sheets (11) being movable downwards to depress the jacquard needles (2) to escape from the cams (3), each of the jacquard needles (2) characterized by:a fulcrum (21) connected with the knitting needle (4);a neck (22) extended from the fulcrum (21);a force received section (24) which is connected to the neck (22) and includes a plurality of needle butts (241) depressed by the needle selected sheets (11);a needle foot (26) which is extended from the force received section (24) and located in a slide track formed on the cam (3) in normal conditions; anda return structure (25) which is extended from the neck (22) and includes a bend end (251) at a distal end beneath the needle foot (26) to butt an inner wall of the upper needle dial (5), and spaced from the force received section (24) by a retraction gap (27) to form a movement space while the force received section (24) is depressed by the needle selected sheet (11), the return structure (25) being bendable upon receiving a depressing force through the neck (22) to generate an elastic force to rebound the force received section (24) back.
- The circular knitting machine jacquard needle equipped with a return structure of claim 1, wherein the return structure (25) is formed in an arched manner and extended from the neck (22) to the bend end (251).
- The circular knitting machine jacquard needle equipped with a return structure of claim 1 or 2, wherein the neck (22) is connected to the force received section (24) through a shoulder (23) which is extended upwards from the neck (22) such that the force received section (24) is at a higher horizontal elevation than the neck (22) in the circular knitting machine.
- The circular knitting machine jacquard needle equipped with a return structure of claim 3, wherein the shoulder (23) includes an arched notch (231) at one end of the retraction gap (27) to reduce stress.
- The circular knitting machine jacquard needle equipped with a return structure of one of the preceding claims, wherein the return structure (25) is selectively an elastic plate, an elastic rod or an elastic strut.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10003725A EP2374921A1 (en) | 2010-04-07 | 2010-04-07 | Circular knitting machine Jacquard needle equipped with a return structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10003725A EP2374921A1 (en) | 2010-04-07 | 2010-04-07 | Circular knitting machine Jacquard needle equipped with a return structure |
Publications (1)
Publication Number | Publication Date |
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EP2374921A1 true EP2374921A1 (en) | 2011-10-12 |
Family
ID=42262006
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10003725A Withdrawn EP2374921A1 (en) | 2010-04-07 | 2010-04-07 | Circular knitting machine Jacquard needle equipped with a return structure |
Country Status (1)
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EP (1) | EP2374921A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102677382A (en) * | 2012-06-11 | 2012-09-19 | 绍兴豪宇精密机械科技有限公司 | Computer circular knitting machine with partitioned pressing needle and embedded jacquard weave structure |
CN109371556A (en) * | 2018-12-06 | 2019-02-22 | 黄灿华 | A kind of two-sided circular knitting machine dials selecting mechanism |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02244565A (en) | 1989-03-17 | 1990-09-28 | Asahi Chem Ind Co Ltd | Nonaqueous battery |
GB2329907A (en) * | 1997-10-05 | 1999-04-07 | Sipra Patent Beteiligung | Selector jack for a knitting machine |
US6023948A (en) * | 1997-05-14 | 2000-02-15 | Groz Beckert Kg | Knitting tool, such as a selector sinker or a needle, having an integral control spring |
US6082142A (en) * | 1995-11-07 | 2000-07-04 | Hans Ruster Gmbh & Co. | Sinker for selection and control of loop-forming movements of knitting implements of a knitting machine |
US6089047A (en) * | 1999-09-10 | 2000-07-18 | Pai Lung Machinery Mill Co., Ltd. | Inner pile jacquard mechanism for a double-loop towel circular knitting machine |
US6962065B2 (en) * | 2003-05-09 | 2005-11-08 | Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh | Knitting machine, in particular circular knitting machine, and control jack suitable for same |
CN101570914A (en) * | 2009-05-31 | 2009-11-04 | 冯加林 | Knitting needle combination applicable to electromagnetic needle selection |
-
2010
- 2010-04-07 EP EP10003725A patent/EP2374921A1/en not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02244565A (en) | 1989-03-17 | 1990-09-28 | Asahi Chem Ind Co Ltd | Nonaqueous battery |
US6082142A (en) * | 1995-11-07 | 2000-07-04 | Hans Ruster Gmbh & Co. | Sinker for selection and control of loop-forming movements of knitting implements of a knitting machine |
US6023948A (en) * | 1997-05-14 | 2000-02-15 | Groz Beckert Kg | Knitting tool, such as a selector sinker or a needle, having an integral control spring |
GB2329907A (en) * | 1997-10-05 | 1999-04-07 | Sipra Patent Beteiligung | Selector jack for a knitting machine |
US6089047A (en) * | 1999-09-10 | 2000-07-18 | Pai Lung Machinery Mill Co., Ltd. | Inner pile jacquard mechanism for a double-loop towel circular knitting machine |
US6962065B2 (en) * | 2003-05-09 | 2005-11-08 | Sipra Patententwicklungs- Und Beteiligungsgesellschaft Mbh | Knitting machine, in particular circular knitting machine, and control jack suitable for same |
CN101570914A (en) * | 2009-05-31 | 2009-11-04 | 冯加林 | Knitting needle combination applicable to electromagnetic needle selection |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102677382A (en) * | 2012-06-11 | 2012-09-19 | 绍兴豪宇精密机械科技有限公司 | Computer circular knitting machine with partitioned pressing needle and embedded jacquard weave structure |
CN109371556A (en) * | 2018-12-06 | 2019-02-22 | 黄灿华 | A kind of two-sided circular knitting machine dials selecting mechanism |
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