Circular knitting machine and method for knitting double-sided long pile knitted fabric by using the same

Abstract

To provide a circular knitting machine capable of completing a double-sided long pile knitted fabric.SOLUTION: In a circular knitting machine, a horizontal needle bed (21) comprises a plurality of hooking needles (211) and a plurality of cutters (212) provided between the hooking needles (211) at intervals. A sinker bed (22) comprises a plurality of sinkers (221). A vertical needle bed (23) comprises a plurality of cutter-equipped knitting needles (231) and a plurality of crochet needles (232) provided between the cutter-equipped knitting needles (231) at intervals. Before the cutter-equipped knitting needles (231) protrude to incise first pile loops, latch needles (233) included in needles to be used for cutting off yarns among the cutter-equipped knitting needles (231) are completely free of loops, and the needles going to cut off yarns among the cutter-equipped knitting needles (231) have already passed through at least one plain knit cam.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a circular knitting machine and a knitting method thereof, and more particularly to a circular knitting machine for knitting double-sided long pile fabrics and a knitting method thereof. [Background technology]

[0002] Patent Document 1 discloses a double-sided pile knitting fabric in Figure 16. However, this technical solution actually only discloses a circular knitting machine for knitting a single-sided pile knitting fabric, and there are still many matters to be considered when designing the circular knitting machine, apart from adding a yarn cutting structure on another side. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Korean Patent No. KR101457067B1 Summary of the Invention [Problem to be solved by the invention]

[0004] The main object of the present invention is to solve the problem that the conventional circular knitting machine cannot complete double-sided long pile knitted fabrics during knitting. [Means for solving the problem]

[0005] The present invention has been made to achieve the above object, and is a circular knitting machine including a horizontal needle bed, a sinker bed, and a vertical needle bed, the horizontal needle bed including a plurality of hook needles and a plurality of cutters spaced apart between the hook needles, the sinker bed including a plurality of sinkers, and the vertical needle bed including a plurality of knitting needles with cutters and a plurality of crochet hooks spaced apart between the knitting needles with cutters. The circular knitting machine is for knitting double-sided long pile fabric, and the knitting needles with cutters form a base fabric with the hook needles and the crochet hooks, and a first pile loop and a second pile loop connected to the base fabric, and the first pile loop and the second pile loop are cut by the knitting needles with cutters and the cutters, respectively, to form a plurality of long pile loops located on two opposing sides of the base fabric, and before the knitting needles with cutters project to cut the first pile loop, the latch needle included in the knitting needles with cutters that are intended to cut the yarn has the loop completely removed, and the knitting needles with cutters that are intended to cut the yarn have already passed at least one flat knitting cam.

[0006] In one embodiment, each of these cutter needles is associated with a latch needle assembly and a plate.

[0007] In one embodiment, each of these cutter needles includes the latch needle and a cutting edge that has a horizontal height lower than the latch needle, and the latch needle is the head of each of these cutter needles.

[0008] In one embodiment, the hook needles, the cutters, the sinkers, the knitting needles with cutters and the crochet hooks are each guided in their movements by a plurality of cams.

[0009] The present invention also provides a method for knitting a double-sided long pile fabric on a circular knitting machine, the method comprising the steps of: a first loop forming step of feeding two yarns and knitting a base structure formed by one of the two yarns and a first pile loop connected to the base structure with at least one of a plurality of knitting needles with cutters and at least one of a plurality of crochet hooks; a second loop forming step of feeding two yarns and knitting the base structure formed by one of the two yarns and a second pile loop connected to the base structure with at least one of the knitting needles with cutters and at least one of the plurality of hooking needles, the first pile loop and the second pile loop being located on both sides of the base structure; a first yarn cutting step of controlling at least one of the knitting needles with cutters to perform yarn cutting on the first pile loop to form a long pile structure; a second yarn cutting step of controlling one of the plurality of cutters to perform yarn cutting on the second pile loop to form another long pile structure; The first loop forming step is not followed by the first yarn cutting step, and when the knitting needles with cutters project to cut the first pile loop, the latch needle included in the knitting needle with cutters that is to cut the yarn has the loop completely removed, and the knitting needle with cutters that is to cut the yarn has already passed at least one flat knitting cam.

[0010] In one embodiment, the method includes performing the first loop forming step, the second loop forming step, the first yarn cutting step, and the second yarn cutting step in this order. Effect of the Invention

[0011] The present invention as embodied above has the following features compared to the prior art: Before the knitting needles with cutters project to cut the first pile loop, the loops have been completely removed from the latch needles included in the knitting needles with cutters that are to cut the yarn, and the latch needles have already passed at least one flat knitting cam, thereby avoiding problems such as fabric floating and unstable loop formation that arise when two processes are performed successively when knitting on a circular knitting machine. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a perspective view of a partial structure of a circular knitting machine according to the present invention. [Diagram 2] FIG. 2 is a schematic cross-sectional view of the structure of a circular knitting machine of the present invention. [Diagram 3] FIG. 3 is an exploded schematic view of a knitting needle with a cutter according to the present invention. [Figure 4] FIG. 4 is a schematic diagram of the structure of a double-sided long pile knitted fabric. [Diagram 5] FIG. 5 is a schematic cross-sectional view of the structure of a circular knitting machine of the present invention. [Figure 6] FIG. 6 is a schematic diagram of the structure of a non-cut pile knit fabric of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, the present invention will be described in detail and its technical content with reference to the drawings. 1 and 2, the present invention provides a circular knitting machine 20 including a horizontal needle bed 21, a sinker bed 22, and a vertical needle bed 23. The horizontal needle bed 21 is located on a dial 24 of the circular knitting machine 20, the sinker bed 22 is located on a sinker ring 25 of the circular knitting machine 20, and the vertical needle bed 23 is located on a cylinder 26 of the circular knitting machine 20. The horizontal needle bed 21 includes a plurality of hook needles 211 and a plurality of cutters 212 spaced apart between the hook needles 211, the sinker bed 22 includes a plurality of sinkers 221, and the vertical needle bed 23 includes a plurality of knitting needles with cutters 231 and a plurality of crochet hooks 232 spaced apart between the knitting needles with cutters 231. None of these hook needles 211 and these crochet hooks 232 have a latch needle structure, and each of these knitting needles with cutters 231 includes a latch needle 233 and a cutting edge 234, and the horizontal height of the cutting edge 234 is lower than that of the latch needle 233, and the latch needle 233 is the head of each of these knitting needles with cutters 231. Also, referring to FIG. 3, in one embodiment, each of these knitting needles with cutters 231 is combined with a latch needle assembly 235 and a plate 236. Furthermore, the latch needle assembly 235 and the plate 236 each have an assembly groove 237 and an assembly bump 238, so that the latch needle assembly 235 and the plate 236 are located on the same axis.

[0014] In addition, the hook needles 211, the cutters 212, the sinkers 221, the knitting needles with cutters 231, and the crochet hooks 232 are guided by a plurality of cams 27 to perform protruding or retracting motions. As shown in FIG. 5, the cams 27 include at least one flat knitting cam 271 and at least one knitting cam 272. Taking the knitting needles with cutters 231 as an example, when each of the knitting needles with cutters 231 passes through at least one flat knitting cam 271, it is in a flat knitting state (also called a yarn over state) with a rail design on at least one flat knitting cam 271. When each of the knitting needles with cutters 231 passes through at least one knitting cam 272, protruding and retracting motions occur with a rail design on at least one knitting cam 272.

[0015] Still referring to FIG. 1, the circular knitting machine 20 further includes a plurality of yarn feeders 28 for feeding at least one yarn for knitting.

[0016] Furthermore, as shown in FIG. 4, the circular knitting machine 20 is for knitting a double-sided long pile fabric 30. The double-sided long pile fabric 30 includes a base structure 31 and two long pile structures 32 which are connected to the base structure 31 and located on two opposing sides of the base structure 31, and each of the two long pile structures 32 includes a plurality of cut piles 321, and the length of these cut piles 321 is 3.5 mm to 15 mm.

[0017] Also, referring to Figs. 2 to 6, the present invention provides a method for knitting a double-sided long pile knitted fabric 30 on a circular knitting machine 20, the method comprising: a first loop forming step of feeding two yarns and knitting a base structure 31 formed by one of the two yarns and a first pile loop 322 connected to the base structure 31 with at least one of the knitting needles 231 with cutters and at least one of the crochet hooks 232; a second loop forming step in which two yarns are fed and a base structure 31 formed by one of the two yarns and a second pile loop 323 connected to the base structure 31 are knitted with at least one of the knitting needles with cutters 231 and at least one of the crochet hooks 232, the second pile loop 323 and the first pile loop 322 being located on both sides of the base structure 31 as shown in FIG. 6; a first yarn cutting step of controlling at least one of the cutter-equipped knitting needles 231 to perform yarn cutting on the first pile loops 322 to form the cut piles 321; and a second yarn cutting step of controlling one of the cutters 212 to perform yarn cutting on the second pile loops 323 to form the cut piles 321.

[0018] Furthermore, in the process of knitting the double-sided long pile fabric 30 by the method using the circular knitting machine 20 of the present invention, before the knitting needles 231 with cutters are pushed out to cut the first pile loop 322 (i.e., before the first yarn cutting step is entered), the latch needles 233 included in the knitting needles 231 with cutters that are to cut the yarn have completely removed the loops, and the knitting needles 231 with cutters that are to cut the yarn have already passed at least one flat knitting cam 271. In other words, the first loop forming step is not directly connected to the first yarn cutting step, and there is a preparation time between the two steps, which may be adjusted according to the implementation, but the preparation time is at least the time it takes for the knitting needles 231 with cutters that are to cut the yarn to completely pass one flat knitting cam 271, as shown in Figure 5. This avoids problems such as fabric floating and unstable loop formation that arise from two steps being performed consecutively when knitting using the circular knitting machine 20.

[0019] Furthermore, in one embodiment, the method of the present invention includes performing the first loop forming step, the second loop forming step, the first yarn cutting step, and the second yarn cutting step in this order. [Explanation of symbols]

[0020] 20 Circular knitting machine 21 Horizontal needle bed 211 Hooking needle 212 Cutter 22 Sinker Bed 221 Sinker 23 Vertical Needle Bed 231 Knitting needle with cutter 232 Crochet Hook 233 Latch Needle 234 Cutting edge 235 Latch Needle Assembly 236 Plate 237 Assembly groove 238 Assembly bump 24 Dial 25 Sinker Ring 26 cylinders 27 Cam 271 Flat knitting cam 272 Knitting Cam 28 Yarn feeder 30 Double-sided long pile knitting 31 Basic organization 32 Long pile structure 321 Cut pile 322 1st pile loop 323 2nd pile loop

Claims

1. A circular knitting machine, comprising: a horizontal needle bed having a plurality of hook needles and a plurality of cutters spaced apart between the hook needles; a sinker bed having a plurality of sinkers; a vertical needle bed having a plurality of cutter-equipped knitting needles and a plurality of crochet hooks spaced apart between the cutter-equipped knitting needles; the circular knitting machine is for knitting a double-sided long pile fabric, and the knitting needles with cutters form a base structure with the hook needles and the crochet hooks, and a first pile loop and a second pile loop connected to the base structure, the first pile loop and the second pile loop are cut by the knitting needles with cutters and the cutters, respectively, to form a plurality of long pile structures located on two opposing sides of the base structure, and before the knitting needles with cutters project to cut the first pile loop, the latch needle included in the knitting needles with cutters that are intended to cut the yarn has the loop completely removed, and the knitting needles with cutters that are intended to cut the yarn have already passed at least one flat knitting cam.

2. 2. A circular knitting machine according to claim 1, characterized in that each of these knitting needles with cutters is associated with a latch needle assembly and a plate.

3. 3. The circular knitting machine according to claim 1, wherein each of the knitting needles with cutters includes the latch needle and a cutting blade having a horizontal height lower than that of the latch needle, and the latch needle is a head of each of the knitting needles with cutters.

4. 4. The circular knitting machine according to claim 3, characterized in that said hook needles, said cutters, said sinkers, said knitting needles with cutters and said crochet hooks are each guided and operated by a plurality of cams.

5. 3. A circular knitting machine according to claim 1, characterized in that the hook needles, the cutters, the sinkers, the knitting needles with cutters and the crochet hooks are each guided and operated by a plurality of cams.

6. A method for knitting a double-sided long pile fabric on a circular knitting machine, comprising the steps of: a first loop forming step of feeding two yarns and knitting, with at least one of a plurality of knitting needles with cutters and at least one of a plurality of crochet hooks, a base structure formed by one of the two yarns and a first pile loop connected to the base structure; a second loop forming step of feeding two yarns and knitting the base structure formed by one of the two yarns and a second pile loop connected to the base structure with at least one of the knitting needles with cutters and at least one of the plurality of hooking needles, the first pile loop and the second pile loop being located on both sides of the base structure; a first yarn cutting step of controlling at least one of the knitting needles with cutters to perform yarn cutting on the first pile loops to form a long pile structure; a second yarn cutting step of controlling one of the plurality of cutters to perform yarn cutting on the second pile loops to form another long pile structure; The method for knitting a double-sided long pile fabric on a circular knitting machine is characterized in that the first loop forming step is not followed by the first yarn cutting step, and when the knitting needles with cutters project to cut the first pile loop, the latch needle included in the knitting needle with cutters that is intended to cut the yarn has the loop completely removed, and the knitting needle with cutters that is intended to cut the yarn has already passed at least one flat knitting cam.

7. 7. The method for knitting a double-sided long pile fabric with a circular knitting machine according to claim 6, wherein the first loop forming step, the second loop forming step, the first yarn cutting step, and the second yarn cutting step are carried out in this order.

Images