A circular knitting machine for knitting double-sided yarn-dyed fabrics.

Abstract

Improves the clarity of each color block. [Solution] A circular knitting machine for knitting double-sided yarn-dyed knitted fabric according to one embodiment includes a cylinder, a dial, a cylinder cam group, a dial cam group, at least one yarn feed port, and at least one needle selector. The cylinder includes a plurality of first knitting needles, and the dial includes a plurality of second knitting needles. These first knitting needles knit the front side of the double-sided yarn-dyed knitted fabric, and these second knitting needles knit the back side of the double-sided yarn-dyed knitted fabric. At least one yarn feed port supplies a first color yarn and a second color yarn. Each of these first knitting needles has a first trajectory and a second trajectory. Each of these first knitting needles pulls only the first color yarn in the first trajectory to form a loop, and each of these first knitting needles pulls only the second color yarn in the second trajectory to form a loop. Each of these second knitting needles is guided by the dial cam group, has only one trajectory, and pulls the first color yarn and the second color yarn to form a loop.

Description

Technical Field

[0001] The present invention provides a circular knitting machine, and particularly a circular knitting machine for knitting double-sided pre-dyed knitted fabrics.

Background Art

[0002] Patents such as Patent Documents 1 to 6 disclose inventions of knitting pre-dyed knitted fabrics with a circular knitting machine. However, the front loops of conventional pre-dyed knitted fabrics are formed by both the surface yarn and the ground yarn. It can be understood from this patent that color change is achieved by changing the relative position of the surface yarn and the ground yarn to change the form of the front loop. Although the conventional method can achieve color change, when observing the front loop, only by changing the relative position of the surface yarn and the ground yarn, a color different from the color presentation is still visible (the surface yarn is the color presentation, and the ground yarn is a color different from the color presentation). Therefore, the color presentation of the front loop is not pure, and when observing the entire pre-dyed knitted fabric, there is a problem that the pattern composed of multiple front loops looks blurred.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Patent Document 5

Patent Document 6

Summary of the Invention

Problems to be Solved by the Invention

[0004] The main objective of this invention is to solve the problem that the color of the front loops of conventional yarn-dyed knitted fabrics is not pure because it is easily influenced by a different colored yarn than the colored yarn used in knitting. [Means for solving the problem]

[0005] To achieve the above objective, the present invention provides a circular knitting machine for knitting double-sided yarn-dyed knitted fabric. The circular knitting machine includes a cylinder, a dial, a cylinder cam group, a dial cam group, at least one yarn feed port, and at least one needle selector. The cylinder includes a plurality of first knitting needles guided by the cylinder cam group, the dial includes a plurality of second knitting needles guided by the dial cam group, these first knitting needles knit a plurality of front loops of the double-sided yarn-dyed knitted fabric, these second knitting needles knit a plurality of back loops of the double-sided yarn-dyed knitted fabric, and the at least one yarn feed port feeds a first color yarn and a second color yarn. Each of these first knitting needles has a first trajectory and a second trajectory that partially overlaps the first trajectory, and each of these first knitting needles pulls only the first colored yarn on the first trajectory to form one of the front loops, and each of these first knitting needles pulls only the second colored yarn on the second trajectory to form one of the front loops, and each of these second knitting needles is guided by the dial cam group and has only a single trajectory, and each of these second knitting needles pulls the first colored yarn and the second colored yarn to form one of the back loops. The at least one needle selection device controls these first knitting needles to move along the first trajectory or the second trajectory.

[0006] In one embodiment, each of these first knitting needles has a third trajectory that does not extend and pull either the first or second colored yarn, and at least one needle selection device controls these first knitting needles to move along one of the first, second, and third trajectories.

[0007] In one embodiment, the first trajectory includes a first needle protrusion section, a first needle retraction section following the first needle protrusion section, a holding section following the first needle retraction section, and a loop-forming section following the holding section; the second trajectory includes a first needle protrusion section, a first needle retraction section, a second needle protrusion section following the first needle retraction section, a second needle retraction section following the second needle protrusion section, and a loop-forming section following the second needle retraction section. When each of these second knitting needles is retracted to form a loop, one of these adjacent first knitting needles, which can cooperate to produce a knitting motion, moves in the loop-forming section of the first trajectory or the second trajectory.

[0008] In one embodiment, the at least one thread feeding port has a first thread feeding hole through which the first colored thread is threaded and a second thread feeding hole through which the second colored thread is threaded, and the virtual plane on which the first thread feeding hole is located intersects with the virtual plane on which the second thread feeding hole is located. [Effects of the Invention]

[0009] The present invention, implemented using the aforementioned technology, has the following features compared to the prior art. In the present invention, each of the first knitting needles has a first trajectory and a second trajectory, and each of the first knitting needles pulls only the first colored yarn in the first trajectory to form one of the front loops, each of the first knitting needles pulls only the second colored yarn in the second trajectory to form one of the front loops, each of the second knitting needles is guided by a dial cam group and has only a single trajectory, and each of the second knitting needles pulls the first colored yarn and the second colored yarn to form one of the back loops. In the front of a double-sided yarn-dyed knitted fabric knitted using the circular knitting machine of the present invention, each of the front loops constituting the front has only a single color yarn, and the coloring is achieved by a single color yarn. Therefore, compared to conventional embodiments of yarn-dyed knitted fabrics in which color plating is obtained by changing the positions of the face yarn and ground yarn, the coloring of each of these front loops in the front of the double-sided yarn-dyed knitted fabric of the present invention is purer, and the clarity of each color block in the front of the double-sided yarn-dyed knitted fabric is improved. [Brief explanation of the drawing]

[0010] [Figure 1] This is a schematic diagram of the structure of one embodiment of the circular knitting machine of the present invention. [Figure 2] This is a schematic diagram of the structure of one embodiment of the double-sided pre-dyed knitted fabric of the present invention. [Figure 3] This is a schematic diagram of the trajectories of each of the first knitting needles of the present invention. [Figure 4] This is a schematic diagram illustrating the case in which the first knitting needle moves along a first trajectory in the present invention. [Figure 5] This is a schematic diagram illustrating the case in which the first knitting needle moves along the second trajectory in the present invention. [Modes for carrying out the invention]

[0011] The technical details of the present invention will be described in detail below with reference to the drawings. Referring to Figure 1, the present invention provides a circular knitting machine 20 comprising a cylinder 21 (also called a lower needle bed), a dial 22 (also called an upper needle bed), a cylinder cam group 23, a dial cam group 24, at least one yarn feed port 25, and at least one needle selector 26. The cylinder 21 comprises a plurality of first knitting needles 211, which are guided by the cylinder cam group 23 and perform the action of catching yarn to form loops, and each of these first knitting needles 211 performs only a single axial reciprocating motion. The dial 22 comprises a plurality of second knitting needles 221, which are guided by the dial cam group 24 and perform the action of catching yarn to form loops, each of these second knitting needles 221 performs only a single axial reciprocating motion, and the direction of the axis of movement of each of these second knitting needles 221 is perpendicular to the direction of the axis of movement of one of these first knitting needles 211. At least one needle sorting device 26 determines the trajectory of these first knitting needles 211 as they move along the cylinder cam group 23.

[0012] Referring also to Figure 2, the circular knitting machine 20 of the present invention is used to knit a double-sided yarn-dyed knitted fabric 40, the front 41 of the double-sided yarn-dyed knitted fabric 40 can produce a change in color by loops, and the double-sided yarn-dyed knitted fabric 40 includes a plurality of front loops 42 and a plurality of back loops 43. In the present invention, these first knitting needles 211 of the cylinder 21 form these front loops 42 of the double-sided yarn-dyed knitted fabric 40, and these second knitting needles 221 of the dial 22 form these back loops 43 of the double-sided yarn-dyed knitted fabric 40. At least one yarn feed port 25 feeds a first color yarn 44 and a second color yarn 45, and the colors of the first color yarn 44 and the second color yarn 45 may be different. In this invention, when multiple yarn feeding ports 25 are arranged, each of the multiple yarn feeding ports 25 supplies two colored yarns (for example, a first colored yarn 44 and a second colored yarn 45), and the colors of the yarns supplied by the multiple yarn feeding ports 25 are not necessarily the same. In one embodiment, one of two adjacent yarn feeding ports 25 can supply two different colored yarns, and the other adjacent port can supply two other colored yarns that are different in color from the aforementioned two colored yarns. This makes it possible to create a four-color variation on the front of the double-sided yarn-dyed knitted fabric 40. Referring also to Figures 3 to 5, in this invention, the cylinder cam group 23 allows these first knitting needles 211 to move in multiple trajectories, and in this invention, each of these first knitting needles 211 has a first trajectory 31 and a second trajectory 32, with the second trajectory 32 partially overlapping with the first trajectory 31. Both the first trajectory 31 and the second trajectory 32 include the action of catching the yarn and forming a loop. Each of these first knitting needles 211 pulls only the first colored yarn 44 in the first trajectory 31 to form one of these front loops 42, and each of these first knitting needles 211 pulls only the second colored yarn 45 in the second trajectory 32 to form one of these front loops 42. These second knitting needles 221 are guided by the dial cam group 24 and have only a single trajectory, and each of these second knitting needles 221 pulls the first colored yarn 44 and the second colored yarn 45 as it moves, and forms a loop using the first colored yarn 44 and the second colored yarn 45 simultaneously.As can be seen from the above, each of these front loops 42 of the double-sided yarn-dyed knit fabric 40 contains only a single color yarn (first color yarn 44 or second color yarn 45), and each of these back loops 43 contains two color yarns (i.e., the first color yarn 44 and the second color yarn 45) fed by the same yarn feeding port 25. Furthermore, in the front of the double-sided yarn-dyed knit fabric 40 knitted with the circular knitting machine 20 of the present invention, each of these front loops 42 constituting the front has only a single color yarn (first color yarn 44 or second color yarn 45), and the coloring is done by a single color yarn. Therefore, compared to conventional embodiments of yarn-dyed knit fabrics in which color plating is obtained by changing the positions of the face yarn and ground yarn, the coloring of each of these front loops 42 on the front of the double-sided yarn-dyed knit fabric 40 of the present invention is purer, and the clarity of each color block on the front of the double-sided yarn-dyed knit fabric 40 is improved.

[0013] Referring to Figures 3 to 5, the first trajectory 31 and the second trajectory 32 will be described further. In one embodiment, the first trajectory 31 includes a first needle protrusion section 331, a first needle retraction section 332 following the first needle protrusion section 331, a holding section 333 following the first needle retraction section 332, and a loop-forming section 334 following the holding section 333. Furthermore, one of these first knitting needles 211 moves along the first trajectory 31, pulling the first colored yarn 44 as it moves into the first needle retraction section 332, and then enters the holding section 333. The first colored yarn 44 remains pulled by the hook of one of these first knitting needles 211 until that needle moves into the loop-forming section 334 of the first trajectory 31. On the other hand, before describing the second trajectory 32, it should be understood that although the second colored yarn 45 and the first colored yarn 44 are supplied from the same yarn feed port 25, their pulling positions are different because the inclination of the second colored yarn 45 and the inclination of the first colored yarn 44 are different. Continuing with the description of the second trajectory 32, in this embodiment, the second trajectory 32 includes a first needle protrusion section 331, a first needle retraction section 332 following the first needle protrusion section 331, a second needle protrusion section 335 following the first needle retraction section 332, a second needle retraction section 336 following the second needle protrusion section 335, and a loop-forming section 334 following the second needle retraction section 336. The second trajectory 32 and the first trajectory 31 overlap in the first needle protrusion section 331 and the first needle retraction section 332. When one of these first knitting needles 211 moves along the second trajectory 32, it similarly pulls the first colored yarn 44 in the first needle retraction section 332. However, as one of these first knitting needles 211 enters the second needle protrusion section 335, the pull on the first colored yarn 44 is released. When one of these first knitting needles 211 enters the second needle retraction section 336, it pulls the second colored yarn 45 and knits using the second colored yarn 45 in the loop formation section 334.Thus, when each of these second knitting needles 221 is retracted to form a loop, one of these adjacent first knitting needles 211 that can cooperate to cause a knitting operation moves in the loop forming section 334 of the first trajectory 31 or the second trajectory 32.

[0014] Referring also to FIG. 3, in one embodiment, each of these first knitting needles 211 has a third trajectory 34, and when each of these first knitting needles 211 moves along the third trajectory 34, it does not protrude to pull either the first color yarn 44 or the second color yarn 45. In this embodiment, at least one needle selecting device 26 controls these first knitting needles 211 to move along one of the first trajectory 31, the second trajectory 32, and the third trajectory 34. The reason for providing the third trajectory 34 is as follows. When implementing the front side of the double-sided pre-dyed knitted fabric 40 with four colors, since each of the plurality of yarn feeding ports 25 provides only two of those colors, when the yarn supplied by the yarn feeding port 25 is not used in the current knitting, at least one of these first knitting needles 211 corresponding to the yarn feeding port 25 does not currently perform a loop forming operation (i.e., does not protrude the needle and moves along the third trajectory 34).

[0015] Referring to FIG. 4, at least one yarn feeding port 25 has a first yarn feeding hole 251 and a second yarn feeding hole 252. The first color yarn 44 is threaded through the first yarn feeding hole 251, and the second color yarn 45 is threaded through the second yarn feeding hole 252. The virtual plane 253 where the first yarn feeding hole 251 is located intersects with the virtual plane 254 where the second yarn feeding hole 252 is located. Since the positions of the first yarn feeding hole 251 and the second yarn feeding hole 252 are different, the paths of the first color yarn 44 and the second color yarn 45 do not overlap.

Explanation of Reference Numerals

[0016] 20 Circular knitting machine 21 Cylinder 211 First knitting needle 22 Dial 221 Second knitting needle 23 Cylinder cam group 24 Dial cam group 25 thread feed port 251 First thread feeding hole 252 Second thread feeding hole 253, 254 Virtual plane 26 Needle selection device 31. The First Trajectory 32 The Second Trajectory 331 First needle protrusion section 332 First needle pull-in section 333 Holding interval 334 Loop-forming section 335 Second needle protrusion section 336 Second needle pull-in section 34 The Third Trajectory 40 Double-sided yarn-dyed knitting 41 Front 42 Front Loop 43 Reverse loop 44 First colored thread 45. Second colored thread

Claims

1. In a circular knitting machine for knitting a double-sided yarn-dyed knit fabric, the machine includes a cylinder, a dial, a cylinder cam group, a dial cam group, and at least one yarn feed port, the cylinder includes a plurality of first knitting needles guided by the cylinder cam group, the dial includes a plurality of second knitting needles guided by the dial cam group, these first knitting needles knit a plurality of front loops of a double-sided yarn-dyed knit fabric, these second knitting needles knit a plurality of back loops of the double-sided yarn-dyed knit fabric, and the at least one yarn feed port supplies a first color yarn and a second color yarn. Each of these first knitting needles has a first trajectory and a second trajectory that partially overlaps the first trajectory, and each of these first knitting needles pulls only the first colored yarn in the first trajectory to form one of the front loops, and each of these first knitting needles pulls only the second colored yarn in the second trajectory to form one of the front loops, and each of these second knitting needles is guided by the dial cam group and has only a single trajectory, and each of these second knitting needles pulls the first colored yarn and the second colored yarn to form one of the back loops, and the circular knitting machine has at least one needle selection device that controls the movement of these first knitting needles along the first trajectory or the second trajectory. A circular knitting machine characterized by the following features.

2. Each of these first knitting needles has a third trajectory that is not extended to pull either the first or second colored yarn, and the at least one needle selection device controls the first knitting needles to move along one of the first, second, and third trajectories, as described in claim 1, a circular knitting machine for knitting double-sided yarn-dyed knit fabric.

3. A circular knitting machine for knitting double-sided yarn-dyed knitted fabric according to claim 1 or 2, wherein the first trajectory includes a first needle protrusion section, a first needle retraction section following the first needle protrusion section, a holding section following the first needle retraction section, and a loop-forming section following the holding section, and the second trajectory includes a first needle protrusion section, a first needle retraction section, a second needle protrusion section following the first needle retraction section, a second needle retraction section following the second needle protrusion section, and the loop-forming section following the second needle retraction section, and when each of these second knitting needles is retracted to form a loop, one of these adjacent first knitting needles that can cooperate to produce a knitting operation moves in the loop-forming section of the first trajectory or the second trajectory.

4. The circular knitting machine for knitting double-sided yarn-dyed knitted fabric according to claim 3, wherein the at least one yarn feeding port has a first yarn feeding hole through which the first colored yarn is drilled and a second yarn feeding hole through which the second colored yarn is drilled, and the virtual plane on which the first yarn feeding hole is located intersects with the virtual plane on which the second yarn feeding hole is located.

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