EP0761858A1 - Needle unit for knitting machine - Google Patents
Needle unit for knitting machine Download PDFInfo
- Publication number
- EP0761858A1 EP0761858A1 EP96113498A EP96113498A EP0761858A1 EP 0761858 A1 EP0761858 A1 EP 0761858A1 EP 96113498 A EP96113498 A EP 96113498A EP 96113498 A EP96113498 A EP 96113498A EP 0761858 A1 EP0761858 A1 EP 0761858A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- jack
- needle
- push
- butt
- resilient piece
- 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
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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
- D04B11/00—Straight-bar knitting machines with fixed needles
Definitions
- This invention relates to a needle unit mainly for use in a weft knitting machine.
- Fig. 6 shows a conventional needle unit which comprises a needle body 72 having a hook 70 and a latch 71 for opening and closing the hook 70, a jack 73 coupled to the bottom of the needle body 72 and provided with a butt 75 on one side thereof, and a presser 74 pressed against one side of the jack 73 and provided with a butt 76 protruding in the same direction as the butt 75.
- This needle unit is inserted in each of a plurality of parallel needle grooves D2 formed in a needle bed B2.
- a carriage C2 is provided so as to move along the needle bed B2 in the direction in which the needle grooves D2 are arranged. It has a reference surface 81 facing the needle bed B2 and having two kinds of cams 82 and 83 adapted to engage the butt 75.
- the cams 82 and 83 differ in the degree of protrusion and the shape of the guide surfaces from each other. That is, the cam 83 protrudes more prominently from the reference surface 81 than the cam 82.
- the carriage C2 is provided with a solenoid 84 adapted to press the butt 76.
- the cam 83 guides the butt 75 to move the needle body 72 up and down together with the jack 73. Due to the different shapes of the cams 82 and 83, the needle body 72 is moved up and down by different degrees at different timings in the state shown in Fig. 7 than in the state shown in Fig. 6.
- An object of this invention is to provide a needle unit which is changeable in movement and which is free of friction loss while the needle body is moving up and down.
- a needle unit for use in a knitting machine comprising a select jack, a push-up jack and a needle body arranged in a needle groove in this order from bottom to top, the push-up jack being adapted to be pushed up by raising the select jack, the needle body having at its bottom a bifurcated portion comprising a support piece and a resilient piece, the push-up jack having its top end slidably inserted between the support piece and the resilient piece, the resilient piece being biased toward the push-up jack, the resilient piece being provided in its inner surface with two recesses having different depths and on its outer surface with a butt, the push-up jack having a protrusion on one side thereof adapted to engage in and out of one of the recesses when the push-up jack slides up and down.
- the needle unit according to this invention is inserted in each of a plurality of parallel needle grooves D1 formed in the needle bed B1 and comprises a select jack 1, a push-up jack 2 and a needle body 3 arranged in this order from bottom to top.
- the select jack 1 has a lower, a middle and an upper butt 4, 5 and 6 at one side thereof.
- the butts 5 of the select jacks 1 in adjacent needle grooves D1 are longitudinally displaced from each other.
- a butt 7 and a protrusion 8 are provided near its bottom end and at its intermediate portion, respectively.
- the needle body 3 has a bifurcated bottom portion comprising a support piece 9 and a resilient piece 10.
- the push-up jack 2 has its top end slidably inserted between the support piece 9 and the resilient piece 10.
- the resilient piece 10 is biased toward the push-up jack 2 and formed with recesses 11 and 12 in the inner surface near its bottom end. As the push-up jack 2 is moved up and down, the protrusion 8 is adapted to engage in the recess 11 or 12.
- the needle body 3 has a butt 13 on the outer surface of the resilient piece 10 near its bottom end and a butt 14 provided slightly over the base of the resilient piece 10 and protruding in the same direction as the butt 13.
- the recess 11 is deeper than the recess 12, so that when the protrusion 8 of the push-up jack 2 is received in the recess 11, the butt 13 protrudes one step from the needle groove D1, and when the protrusion 18 is in the recess 12, the butt 13 will protrude two steps from the needle groove D2.
- the protrusion 8 is not received in either of the recesses 11 and 12, the butt 13 is completely retracted in the needle groove D1.
- the needle body 3 carries at its top end a hook 15 and a latch 16 for opening and closing the hook 15.
- a carriage C1 is provided to move along the needle bed B1 in the direction in which the needle grooves D1 are arranged. It has a reference surface 21 facing the needle bed B1 and having cams 22-38 as shown in Fig. 2.
- the cams 24, 28, 35 and 38 are protrudable from the reference surface 21.
- the cams 31 and 32 are variable in the degree of protrusion from the reference surface 21.
- the cam 34 is movable along a guide groove 39 formed in the reference surface 21.
- a solenoid 40 is provided on the portion between the cams 22 and 25 to press each butt 5.
- solid lines, chain lines and two-dot chain lines indicate the paths of butts 4, 6, 7, 13 and 14 when the needle unit performs knitting (forming a loop), tucking and forms no loop, respectively, as the carriage C1 is moved rightwardly with the left cam 24, right cam 28 and cam 38 retracted completely in the reference surface 21 and the cams 31 and 32 protruding to one step lesser degree than the other cams.
- the right cam 23 guides the butt 4 to raise the select jack 1 and thus the push-up jack 2 until the protrusion 8 engages in the recess 11.
- the butt 13 thus protrudes one step from the needle groove D1.
- the butt 4 is guided by the right cam 24 (Fig. 4), so that the select jack 1 rises further, pushing up the push-up jack 2 until the protrusion 8 engages in the recess 12.
- the butt 13 thus protrudes two steps from the needle groove D1.
- the needle body 3 rises together with the push-up jack 2 with its butt 13 guided by the cams 31 and 32.
- the loop formed thus moves down past the latch 16, and a yarn is supplied to the hook 15.
- the butt 5 When no loop is formed, the butt 5 is pushed by the solenoid 40, as shown in Fig. 5, to retract the butt 4 completely into the needle groove D1, so that the select jack 1 and thus the push-up jack 2 do not rise.
- the protrusion 8 does not engage in either of the recesses 11 and 12.
- the carriage C1 thus moves with the butt 13 retracted in the needle groove D1, so that the needle body 3 does not rise from the needle bed B and no yarn is provided to the hook 15. Thus, no loop is formed.
- the left cam 24 and the right cam 28 are protruded from the reference surface 21 with the right cam 24 and the left cam 28 retracted in the reference surface 21.
- the needle body 3 may be divided into a needle member 50 having the hook 15 and the latch 16, and a support member 51 having the support piece 9 and the resilient piece 10. With this arrangement, if the resilient piece 10 is broken, it is necessary to replace only the support member 51. It is thus possible to reduce maintenance cost.
- the support piece 9 and the resilient piece 10 may be separate members so that only the resilient piece 10 can be replaced.
- the resilient piece 10 is coupled to the support piece 9 through a movable joint 52 and is biased by a spring rod 53 toward the push-up jack 2. If the spring rod 53 is broken, it is necessary to replace only the spring rod 53.
- the amount of protrusion of each butt from the needle groove is adjusted by adjusting the distance the select jack is raised to change over the cams to be brought into engagement with the butts and thus to change the movement of the needle unit. jack by engaging the protrusion in one of the recesses. Since no frictional resistance is produced, no large force is needed to raise the needle body.
- the needle body is divided into a needle member and a support member provided with the support piece and the resilient piece, if the resilient piece is broken, it is necessary to replace only the support portion. Repair costs are thus low.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Knitting Machines (AREA)
Abstract
Description
- This invention relates to a needle unit mainly for use in a weft knitting machine.
- Fig. 6 shows a conventional needle unit which comprises a
needle body 72 having ahook 70 and alatch 71 for opening and closing thehook 70, ajack 73 coupled to the bottom of theneedle body 72 and provided with abutt 75 on one side thereof, and apresser 74 pressed against one side of thejack 73 and provided with abutt 76 protruding in the same direction as thebutt 75. This needle unit is inserted in each of a plurality of parallel needle grooves D2 formed in a needle bed B2. - A carriage C2 is provided so as to move along the needle bed B2 in the direction in which the needle grooves D2 are arranged. It has a
reference surface 81 facing the needle bed B2 and having two kinds ofcams butt 75. Thecams cam 83 protrudes more prominently from thereference surface 81 than thecam 82. The carriage C2 is provided with asolenoid 84 adapted to press thebutt 76. - When the carriage C2 is moved in the direction the needle grooves D2 are arranged with the
butt 76 not pressed by thesolenoid 84 as shown in Fig. 6, thebutt 75, which is now protruding from the needle groove D2 to the maximum, is guided by thecam 82, so that theneedle body 72 moves up and down together with thejack 73. - When the carriage C2 is moved with the
butt 76 pushed in one step by thesolenoid 84 as shown in Fig. 7, thecam 83 guides thebutt 75 to move theneedle body 72 up and down together with thejack 73. Due to the different shapes of thecams needle body 72 is moved up and down by different degrees at different timings in the state shown in Fig. 7 than in the state shown in Fig. 6. - When the
butt 76 is pushed in further by thesolenoid 84 until it retracts completely into the needle groove D2, theneedle body 72 will not move up and down because thebutt 75 is not in engagement with either of thecams - By varying the degree of protrusion of the
butt 76 from the needle groove D2 with thesolenoid 84, it is possible to control the movement of the needle unit and thus to form any desired stitch pattern. - One problem with this conventional needle unit is that because the
needle body 72 is moved up and down with thepresser 74 pressed against thejack 73, a lot of energy is needed to move the carriage C2 overcoming the frictional resistance between thejack 73 and thepresser 74. - An object of this invention is to provide a needle unit which is changeable in movement and which is free of friction loss while the needle body is moving up and down.
- According to this invention, there is provided a needle unit for use in a knitting machine comprising a select jack, a push-up jack and a needle body arranged in a needle groove in this order from bottom to top, the push-up jack being adapted to be pushed up by raising the select jack, the needle body having at its bottom a bifurcated portion comprising a support piece and a resilient piece, the push-up jack having its top end slidably inserted between the support piece and the resilient piece, the resilient piece being biased toward the push-up jack, the resilient piece being provided in its inner surface with two recesses having different depths and on its outer surface with a butt, the push-up jack having a protrusion on one side thereof adapted to engage in and out of one of the recesses when the push-up jack slides up and down.
- Other features and objects of the present invention will become apparent from the following description made with reference to the accompanying drawings, in which:
-
- Fig. 1 is a partial vertical sectional side view of a first embodiment of the needle unit according to this invention, as mounted in a knitting machine;
- Fig. 2 is a sectional view taken along line II-II of Fig. 1;
- Fig. 3 is a sectional view taken along line III-III of Fig. 2;
- Fig. 4 is a sectional view taken along line IV-IV of Fig. 2;
- Fig. 5 is a sectional view taken along line V-V of Fig. 2;
- Fig. 6 is a partial vertical sectional side view of a conventional needle unit as mounted in a knitting machine;
- Fig. 7 shows its operational state;
- Fig. 8 shows its another operational state;
- Fig. 9 is a partial side view of a second embodiment of the needle unit according to this invention;
- Fig. 10 is a partial side view of a third embodiment; and
- Fig. 11 is a similar view of a fourth embodiment.
- Embodiments of this invention are described with reference to the accompanying drawings.
- Referring to Fig. 1, the needle unit according to this invention is inserted in each of a plurality of parallel needle grooves D1 formed in the needle bed B1 and comprises a
select jack 1, a push-up jack 2 and aneedle body 3 arranged in this order from bottom to top. - The
select jack 1 has a lower, a middle and anupper butt butts 5 of theselect jacks 1 in adjacent needle grooves D1 are longitudinally displaced from each other. - On one side of the push-
up jack 2, abutt 7 and aprotrusion 8 are provided near its bottom end and at its intermediate portion, respectively. - The
needle body 3 has a bifurcated bottom portion comprising asupport piece 9 and aresilient piece 10. The push-up jack 2 has its top end slidably inserted between thesupport piece 9 and theresilient piece 10. Theresilient piece 10 is biased toward the push-up jack 2 and formed withrecesses up jack 2 is moved up and down, theprotrusion 8 is adapted to engage in therecess - The
needle body 3 has abutt 13 on the outer surface of theresilient piece 10 near its bottom end and abutt 14 provided slightly over the base of theresilient piece 10 and protruding in the same direction as thebutt 13. Therecess 11 is deeper than therecess 12, so that when theprotrusion 8 of the push-up jack 2 is received in therecess 11, thebutt 13 protrudes one step from the needle groove D1, and when the protrusion 18 is in therecess 12, thebutt 13 will protrude two steps from the needle groove D2. When theprotrusion 8 is not received in either of therecesses butt 13 is completely retracted in the needle groove D1. Theneedle body 3 carries at its top end ahook 15 and alatch 16 for opening and closing thehook 15. - A carriage C1 is provided to move along the needle bed B1 in the direction in which the needle grooves D1 are arranged. It has a
reference surface 21 facing the needle bed B1 and having cams 22-38 as shown in Fig. 2. Thecams reference surface 21. Thecams reference surface 21. Thecam 34 is movable along aguide groove 39 formed in thereference surface 21. Asolenoid 40 is provided on the portion between thecams butt 5. - In Fig. 2, solid lines, chain lines and two-dot chain lines indicate the paths of
butts left cam 24,right cam 28 andcam 38 retracted completely in thereference surface 21 and thecams - In the case of knitting, as shown in Fig. 3, the
right cam 23 guides thebutt 4 to raise theselect jack 1 and thus the push-up jack 2 until theprotrusion 8 engages in therecess 11. Thebutt 13 thus protrudes one step from the needle groove D1. As the carriage C1 moves further right, thebutt 4 is guided by the right cam 24 (Fig. 4), so that theselect jack 1 rises further, pushing up the push-up jack 2 until theprotrusion 8 engages in therecess 12. Thebutt 13 thus protrudes two steps from the needle groove D1. - As the carriage C1 moves further right, the
needle body 3 rises together with the push-up jack 2 with itsbutt 13 guided by thecams latch 16, and a yarn is supplied to thehook 15. - The
butt 13 is then guided by thecams 35 and 34, so that theneedle body 3 and the push-up jack 2 descend, disengaging theprotrusion 8 from therecesses - In the case of tucking, the carriage C1 is moved in the state shown in Fig. 3, with the
butt 13 guided by thecam 30, so that theneedle body 3 rises together with the push-up jack 2. Although a yarn is supplied to thehook 15, the loop formed will not come off thelatch 16 because theneedle body 3 does not rise so high relative to the needle bed B1 as when knitting. - When no loop is formed, the
butt 5 is pushed by thesolenoid 40, as shown in Fig. 5, to retract thebutt 4 completely into the needle groove D1, so that theselect jack 1 and thus the push-up jack 2 do not rise. Theprotrusion 8 does not engage in either of therecesses butt 13 retracted in the needle groove D1, so that theneedle body 3 does not rise from the needle bed B and no yarn is provided to thehook 15. Thus, no loop is formed. - In order for the needle unit to perform the same function as above when the carriage C1 is moved leftwardly, the
left cam 24 and theright cam 28 are protruded from thereference surface 21 with theright cam 24 and theleft cam 28 retracted in thereference surface 21. - By selectively protruding or retracting the
cams 35 and 38, by varying the degrees of protrusion of thecams reference surface 21, by varying the and 32 from thereference surface 21, by varying the position of thecam 34, and by changing the operating timing of thesolenoid 40, it is possible to change the movement of the needle unit and thus to form different stitch patterns. - As shown in Fig. 9, the
needle body 3 may be divided into aneedle member 50 having thehook 15 and thelatch 16, and asupport member 51 having thesupport piece 9 and theresilient piece 10. With this arrangement, if theresilient piece 10 is broken, it is necessary to replace only thesupport member 51. It is thus possible to reduce maintenance cost. - As shown in Fig. 10, the
support piece 9 and theresilient piece 10 may be separate members so that only theresilient piece 10 can be replaced. In the arrangement of Fig. 11, theresilient piece 10 is coupled to thesupport piece 9 through a movable joint 52 and is biased by aspring rod 53 toward the push-upjack 2. If thespring rod 53 is broken, it is necessary to replace only thespring rod 53. - According to this invention, the amount of protrusion of each butt from the needle groove is adjusted by adjusting the distance the select jack is raised to change over the cams to be brought into engagement with the butts and thus to change the movement of the needle unit.
jack by engaging the protrusion in one of the recesses. Since no frictional resistance is produced, no large force is needed to raise the needle body. - It is not necessary to provide the carriage with any additional mechanisms such as cams for guiding the push-up jack, so that the knitting machine can be manufactured at low cost.
- In the arrangement in which the needle body is divided into a needle member and a support member provided with the support piece and the resilient piece, if the resilient piece is broken, it is necessary to replace only the support portion. Repair costs are thus low.
Claims (2)
- A needle unit for use in a knitting machine comprising a select jack, a push-up jack and a needle body arranged in a needle groove in this order from bottom to top, said push-up jack being adapted to be pushed up by raising said select jack, said needle body having at its bottom a bifurcated portion comprising a support piece and a resilient piece, said push-up jack having its top end slidably inserted between said support piece and said resilient piece, said resilient piece being biased toward said push-up jack, said resilient piece being provided in its inner surface with two recesses having different depths and on its outer surface with a butt, said push-up jack having a protrusion on one side thereof adapted to engage in and out of one of said recesses when said push-up jack slides up and down.
- A needle unit as claimed in claim 1 wherein said needle body is divided into a needle member and a support member having said support piece and said resilient piece.
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22994695 | 1995-09-07 | ||
JP22994695 | 1995-09-07 | ||
JP229946/95 | 1995-09-07 | ||
JP18495696 | 1996-07-15 | ||
JP8184956A JP2747280B2 (en) | 1995-09-07 | 1996-07-15 | Needle unit for knitting machine |
JP184956/96 | 1996-07-15 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0761858A1 true EP0761858A1 (en) | 1997-03-12 |
EP0761858B1 EP0761858B1 (en) | 2000-06-28 |
Family
ID=26502813
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96113498A Expired - Lifetime EP0761858B1 (en) | 1995-09-07 | 1996-08-22 | Needle unit for knitting machine |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0761858B1 (en) |
JP (1) | JP2747280B2 (en) |
KR (1) | KR100244077B1 (en) |
CN (1) | CN1062042C (en) |
DE (1) | DE69609024T2 (en) |
ES (1) | ES2149410T3 (en) |
TW (1) | TW312245U (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100494538C (en) * | 2005-07-13 | 2009-06-03 | 冯加林 | Knitting needle and auxiliary needle combination having more than two section needle pressing density |
DE102010026016B4 (en) * | 2010-07-03 | 2012-04-26 | H. Stoll Gmbh & Co. Kg | Flat knitting machine |
DE102010056425B3 (en) * | 2010-12-28 | 2012-04-05 | H. Stoll Gmbh & Co. Kg | Knitting machine has needle bed and needle channels, in which insert parts, particularly knitting needles are longitudinally displaceably mounted |
CN102011264A (en) * | 2011-01-13 | 2011-04-13 | 常州德贝机械有限公司 | Knitting needle and needle plate component of computerized flat knitter |
CA2925149C (en) * | 2015-05-25 | 2022-10-04 | Xiamen Institute Of Rare Earth Materials | Extractant and method for extracting and separating yttrium |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4637227A (en) * | 1985-07-19 | 1987-01-20 | Shima Idea Center Co., Ltd. | Flat knitting machine having compound needles |
WO1990004669A1 (en) * | 1988-10-28 | 1990-05-03 | Universal Maschinenfabrik Dr. Rudolf Schieber Gmbh & Co. Kg | Flat-bed knitting machine |
EP0407872A2 (en) * | 1989-07-10 | 1991-01-16 | MEC-MOR S.r.l. | Knitting machine with needle control device for the knitting of pattern stitches |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3523989C1 (en) * | 1985-07-04 | 1987-01-02 | Schieber Universal Maschf | Flat knitting machine |
-
1996
- 1996-07-15 JP JP8184956A patent/JP2747280B2/en not_active Expired - Lifetime
- 1996-08-12 TW TW086203124U patent/TW312245U/en unknown
- 1996-08-22 EP EP96113498A patent/EP0761858B1/en not_active Expired - Lifetime
- 1996-08-22 DE DE69609024T patent/DE69609024T2/en not_active Expired - Fee Related
- 1996-08-22 ES ES96113498T patent/ES2149410T3/en not_active Expired - Lifetime
- 1996-09-06 KR KR1019960038567A patent/KR100244077B1/en not_active IP Right Cessation
- 1996-09-06 CN CN96112905A patent/CN1062042C/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4637227A (en) * | 1985-07-19 | 1987-01-20 | Shima Idea Center Co., Ltd. | Flat knitting machine having compound needles |
WO1990004669A1 (en) * | 1988-10-28 | 1990-05-03 | Universal Maschinenfabrik Dr. Rudolf Schieber Gmbh & Co. Kg | Flat-bed knitting machine |
EP0407872A2 (en) * | 1989-07-10 | 1991-01-16 | MEC-MOR S.r.l. | Knitting machine with needle control device for the knitting of pattern stitches |
Also Published As
Publication number | Publication date |
---|---|
DE69609024T2 (en) | 2001-03-08 |
JPH09132842A (en) | 1997-05-20 |
TW312245U (en) | 1997-08-01 |
CN1062042C (en) | 2001-02-14 |
KR100244077B1 (en) | 2000-04-01 |
DE69609024D1 (en) | 2000-08-03 |
JP2747280B2 (en) | 1998-05-06 |
KR970015823A (en) | 1997-04-28 |
CN1153836A (en) | 1997-07-09 |
EP0761858B1 (en) | 2000-06-28 |
ES2149410T3 (en) | 2000-11-01 |
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