| WO/2023/140346 | MULTI-KNITTED WEARABLE GARMENT |
| JPS5966551 | FLAME-PROOF PILE FABRIC AND PRODUCTION THEREOF |
| US4051697A | 1977-10-04 | |||
| GB1486017A | 1977-09-14 |
| 1. | A method of knitting a high long pile fabric, comprising : a first step of interposing an auxiliary needle between a first dial latch needle and a second dial latch needle to simultaneously knit a loop pile in conjunction with a weft using the first and second dial latch needle, knitting a ground weave using cylinder race cams and dial stitch cams, and moving the loop pile to an upper bed using a first jack needle moving a knife needle to cut the loop pile by a knife needle cam; a second step of simultaneously knitting the loop pile in conjunction with the weft using the first dial latch needle and a third dial latch needle, knitting the ground weave using the cylinder race cams and dial stitch cams, and moving the loop pile to the upper bed using a third jack needle moving the knife needle to cut the loop pile by the knife needle cam; a third step of simultaneously knitting the loop pile in conjunction with the weft using the second dial latch needle and the third dial latch needle, knitting the ground weave using the cylinder race cams and dial stitch cams, and moving the loop pile to the upper bed using a second jack needle moving the knife needle to cut the loop pile by the knife needle cam; and a fourth step of simultaneously knitting the loop pile in conjunction with the weft using the second dial latch needle and a fourth dial latch needle, knitting the ground weave using the cylinder race cams and dial stitch cams, and moving the loop pile to the upper bed using a fourth jack needle moving the knife needle to cut the loop pile by the knife needle cam, the first to fourth steps being repeated. |
| 2. | A device for knitting a high long pile fabric, comprising : jack needles coming into contact with a lower part of a knife needle at upper parts thereof to upwardly push the knife needle to raise the knife needle; knife needle cams including stitch cams and guide cams and cutting loop piles while the loop pile passing therethrough; and dial cams and cylinder cams operated according to an movement order of dial latch needles and the jack needles to continuously knit the loop piles. |
| 3. | The device as set forth in claim 2, wherein the loop piles are 30 to 40 mm in length. |
| 4. | The device as set forth in claim 2 or 3, wherein the loop piles are continuously and repeatedly knitted in an order of D, A, C, and B. |
Background Art Generally, when a pile fabric is knitted by a circular weft knitting machine, a length of a pile constituting the pile fabric is 15 to 16 mm and up to 20 to 25. mm for the cases of a medium pile and a long pile, respectively. Particularly, in the case of a so-called "Boa"pile fabric, it is impossible to produce the desired pile because the length of the pile is reduced when the pile fabric is subjected to a post-process in a grey state.
Accordingly, this pile fabric is mostly knitted using a warp knitting machine such as a raschel warp knitting machine or a French warp knitting machine. Furthermore, a disk type of a loop press plate is provided at an intersection point of an upper cam plate of the circular weft knitting machine in such a way that four butts of needles are moved by cams elevated to different heights in a 1-3-1-2 manner, so that the needles are selectively operated near a side wall of a cylinder of the circular weft knitting machine to continuously knit a loop according to a cam structure of an upper and a lower cam plate of the circular weft knitting machine.
However, the warp knitting machine is disadvantageous in that a long needle cannot be used because a needle bed of a cylinder cam box is relatively short, investments are relatively high, the warp knitting machine is not cost competitive because its productivity is lower than a weft knitting machine such as the circular weft knitting machine, and it is difficult to produce a high long pile because the loop is cut at only a lower belt.
Other disadvantages of the warp knitting machine are that a pile yarn including a relatively short length of a pile is readily shrunk by heat, use of a relatively long knife needle brings about defects in the operation of the warp knitting machine, it is difficult to produce the warp knitting machine because its scale is very large, and productivity is relatively low.
Disclosure of the Invention Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a method of knitting a high long pile fabric, in which super loop piles with a length of 30 to 40 mm are continuously knitted with respect to a basic ground weave, and cut while passing through knife needle cams. At this time, raveling of the loop piles is prevented because a circular weft knitting machine is provided with a loop pile cut press plate, and the pile fabric having an excellent appearance similar to a French structure and a high quality is gained using the circular weft knitting machine, even after a post-process.
Another object of the present invention is to provide a device for knitting the high long pile fabric, in which auxiliary needles are interposed between first and second dial latch needles, second and third dial latch needles, or third and fourth dial latch needles to be located in a clear position, and the dial latch needles are vertically moved by the butts.
Brief Description of the Drawings The above and other objects, features and other
advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. 1 schematically illustrates a dial cam and a cylinder cam of a circular weft knitting machine according to the present invention; FIG. 2A illustrates side views of dial latch needles and auxiliary needles which have butts provided at various positions according to the present invention; FIG. 2B illustrates side views of jack needles which have race butts provided at different positions according to the present invention; FIG. 2C illustrates a side view of a knife needle according to the present invention; FIG. 3 illustrates the construction of a high long pile fabric according to the present invention; and FIG. 4 is a partially enlarged view of the high long pile fabric according to the present invention.
Best Mode for Carrying Out the Invention Reference should now be made to the drawings, in which the same reference numerals are used throughout the different drawings to designate the same or similar components.
FIG. 1 schematically illustrates a dial cam and a cylinder cam of a circular weft knitting machine according
to the present invention, FIG. 2A illustrates side views of dial latch needles and auxiliary needles which have butts provided at different positions according to the present invention, FIG. 2B illustrates side views of jack needles which have race butts provided at different positions according to the present invention, FIG. 2C illustrates a side view of a knife needle according to the present invention, FIG. 3 illustrates the construction of a high long pile fabric according to the present invention, and FIG. 4 is a partially enlarged view of the high long pile fabric according to the present invention.
A method and a device for knitting the high long pile fabric according to the present invention are characterized in that race cams acting as a repeating unit and selectively moving are guided into a cylinder cam (C) over an auxiliary cam and a guide cam on a lower bed 50, and jack needles upwardly push lower parts of knife needles when the jack needles ascend to raise the knife needles to the knife needle cams.
Additionally, dial stitch cams acting as the repeating unit are arranged on a dial cam (D) over an upper bed 40 of the circular weft knitting machine, dial latch needles (DN1, DN2, DN3, and DN4) selectively moving are guided by the dial stitch cams, loop piles are cut by stitch cams and guide cams of the knife needle cams 20, and the knife needles are operated on the upper bed 40 of the circular weft knitting machine so as to prevent the loop
piles from raveling using a loop pile cut press plate 30.
A weft passes through a loop pile (Ll) and a loop (L2) formed by a ground yarn (G) of a ground weave, and another ground yarn (G1) firmly presses the weft to prevent the piles from being deformed or raveled, thus forming one repeating unit, thereby accomplishing one completed structure of the high long pile fabric.
In other words, while the cylinder cam (C) rotates on the lower bed 50, the butts (b') of the jack needles near the guide cams are sequentially operated by the guide cams and race cams, and dial stitch needles, the dial latch needles moving in conjunction with the dial stitch needles, the jack needles, and the knife needles are systematically vertically operated as the repeating unit in the upper bed 40, knife needle cams 20, loop pile cut press plate 30, and dial cam (D) when the jack needles ascend, thereby knitting various and excellent high long pile fabrics. Further, first dial stitch cams 1,2, 3,4 and second dial stitch cams 1', 2', 3', 4', which move the four different dial latch needles (DN1, DN2, DN3, DN4) having the butts (b) located at different positions and act as the repeating unit, are arranged on the dial cam (D) over the upper bed 40. Furthermore, first cylinder race cams 11,12, 13,14 and second cylinder race cams 11', 12', 13', 14', which move the four different jack needles (CNl, CN2, CN3, CN4) having the butts (b') located at different positions and act as the repeating unit, are arranged on the cylinder cam
(C) over the lower bed 50. As well, the knife needle cams 20 (stitch cams, guide cams) moving the knife needles are arranged on the upper bed 40 of the cylinder cam (C).
According to the present invention, the knife needle cams 20 (stitch cams, guide cams) are positioned on the upper bed 50 over the cylinder race cam located at the highest position in the cylinder cam (C) to cut the high long piles with a length of 30 to 40 mm using the knife needle cams 20. A reference numeral 30 denotes a press plate for keeping shapes of the loop piles.
A rib stitch is formed by the dial latch needles (DN1, DN2, DN3, DN4) in the dial cam (D) and the jack needles (CN1, CN2, CN3, CN4) in the cylinder cam (C), thereby forming the weft and the loop piles to firmly knit the high long piles with the ground weave. The auxiliary needles interposed between the two adjacent dial latch needles (DN and DN2) do only a tucking action, and thus do not form the loop piles. Latches are opened by old loops when the dial latch needles (DN1 and DN2) ascend. At this time, the latches in the auxiliary needles are not opened and located in clear positions. Additionally, the old loops are located between the needles and the latches of a yarn feeder are not closed when the needles ascend to a knit position.
Therefore, the loop pile is simultaneously knitted in conjunction with the weft using first and second dial latch needles (DN1 and DN2), a ground weave is knitted using the cylinder race cams 11,12, 13,14 and dial stitch cams
1,2, 3,4, and the loop pile is moved to the upper bed using a first jack needle (CN1) moving the knife needle to cut the loop pile by the knife needle cam. At this time, the raveling of the loop pile is prevented by the loop pile cut press plate 30.
In addition, the auxiliary needle is interposed between the first dial latch needle and a third dial latch needle (DN1 and DN3) to simultaneously knit the loop pile in conjunction with the weft using the first and third dial latch needles (DNl and DN3), the ground weave is knitted using the cylinder race cams 11,12, 13,14 and dial stitch cams 1,2, 3,4, and the loop pile is moved to the upper bed using a third jack needle (CN3) moving the knife needle to cut the loop pile by the knife needle cam. At this time, the raveling of the loop pile is prevented by the loop pile cut press plate 30.
Further, the auxiliary needle is interposed between the second dial latch needle and the third dial latch needle (DNs and DN3) to simultaneously knit the loop pile in conjunction with the weft using the second dial latch needle and the third dial latch needle (DN2 and DN3), the ground weave is knitted using the cylinder race cams 11,12, 13,14 and dial stitch cams 1,2, 3,4, and the loop pile is moved to the upper bed using a second jack needle (CN2) moving the knife needle to cut the loop pile by the knife needle cam. At this time, the raveling of the loop pile is prevented by the loop pile cut press plate 30.
Furthermore, the auxiliary needle is interposed between the second dial latch needle and a fourth dial latch needle (DN2 and DN4) to simultaneously knit the loop pile in conjunction with the weft using the second dial latch needle and the fourth dial latch needle (DN2 and DN4), the ground weave is knitted using the cylinder race cams 11,12, 13,14 and dial stitch cams 1,2, 3,4, and the loop pile is moved to the upper bed using a fourth jack needle (CN4) moving the knife needle to cut the loop pile by the knife needle cam. At this time, the raveling of the loop pile is prevented by the loop pile cut press plate 30.
When the auxiliary needle (N1) is interposed between the first and second dial latch needles (DN1 and DN2), it only performs a tucking action, and thus the loop piles are not formed. Thereby, the raveling of the high long piles is prevented. The first and third latch needles (DN1 and DN3) are operated in the same way as the first and second latch needles.
In the same way as the above description, the loop piles are formed by the cylinder race cams 11', 12', 13', 14'and the dial stitch cams 1', 2', 3', 4'acting as the repeating unit.
Meanwhile, 16 knife needle cams are arranged on the dial cam, and the number of the knife needle cam on the dial cam depends on its size.
According to the present invention, when the lower parts of the knife needles come into contact with the upper
parts of the jack needles (CN1, CN2, CN3, CN4), that is to say, when the jack needles (CN1, CN2, CN3, CN4) upwardly push the knife needles so as to raise the knife needles, the loop piles are cut while passing through the knife needle cams 20 (stitch cams, guide cams) to form a structure as shown in FIG. 4, thereby the high long piles with the length of about 30 to 40 mm are knitted. The high long piles thus knitted are cut by the loop pile cut press plate 30.
FIG. 3 shows an order of knitting the high long pile fabric according to the present invention, in which the loop piles are repeatedly continuously knitted in an order of D, A, C, and B. As well, there is illustrated a systematic view of the high long pile fabric knitted by the dial stitch cams and cylinder race cams depending on the operation order of the dial latch needles and the jack needles in FIG. 3. In this respect, the operation order of the jack needles (CN1, CN3, CN2, CN4) may be changed by the dial stitch cams and cylinder race cams, thus the system of the high long pile fabric may be changed with its loop shape being unchanged.
With reference to FIG. 4, the weft (Y) passes through the loop pile (LI) and the loop (L2) formed by the ground yarn (G) of the ground weave, and the piles (P) firmly pressed by another ground yarn (G') are cut, thereby accomplishing one completed structure of the high long pile fabric. In FIG. 4, there is illustrated a partially
enlarged view of the high long pile fabric in which the cut piles (P) are arranged so as to show various patterns.
Accordingly, the high long pile fabric includes the high long piles at a surface thereof, and has a smooth, soft surface.
Industrial Applicability As apparent from the above description, the present invention provides a high long pile fabric usefully applied to clothes or toys, which has relatively long piles even after a post-process, thereby ensuring an excellent insulating property and appearance, and having a soft surface.
Furthermore, the present invention is advantageous in that jack needles (CN1, CN2, CN3, CN4) corresponding to dial latch needles (DN1, DN2, DN3, DN4) upwardly push lower parts of knife needles to cut piles by knife needle cams on an upper bed, thus a pile fabric having a pile length of 30 to 40 mm and excellent appearance similar to a French structure, which was conventionally produced by only a warp knitting machine, can be knitted using a circular weft knitting machine, thereby productivity is improved, production costs are reduced, and a high long pile fabric with a high quality is produced in a commercial quantity while raveling of the loop piles is prevented.
The present invention has been described in an
illustrative manner, and it is to be understood that the terminology used is intended to be in the nature of description rather than of limitation. Many modifications and variations of the present invention are possible in light of the above teachings. Therefore, it is to be understood that within the scope of the appended claims, the invention may be practiced otherwise than as specifically described.
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