Knitting method of terry knitted fabric based on flat knitting machine

Abstract

This invention provides a knitting method for terry fabrics based on a flat knitting machine with excellent knitting efficiency. A path switching cam (17) is set up. In the loop row of terry knitting, SYS1 is used to pull in both the terry yarn and the warp yarn in the cam system on the side that becomes the base of the knitted fabric, while only the terry yarn is pulled in the cam system on the side that forms the loop. Then, SYS2 is used to pull in additional yarn in the cam system on the side that becomes the base of the knitted fabric, and the loop is brushed away in the cam system on the side that forms the loop.

Description

Technical Field

[0001] The invention relates to a method for knitting terry knitted fabric based on a flat knitting machine. Background Art

[0002] Terry knitted fabric refers to the following knitted fabric: the base of the terry knitted fabric is formed by loops based on terry yarn and binding warp threads using the knitting needles of one of the front needle bed (hereinafter referred to as FB) and the back needle bed (hereinafter referred to as BB), and the terry loops composed only of terry yarn are formed on the reverse side of the base using the knitting needles of the other needle bed.

[0003] Patent Document 1 discloses a method for knitting a terry knitted fabric using a flat knitting machine equipped with a sinker device. However, the technical solution described in Patent Document 1 cannot be knitted using a flat knitting machine that does not have a sinker device for pulling out terry yarns.

[0004] Figure 3 A method for knitting a terry knitted fabric using a method different from that of Patent Document 1 is disclosed. This method is an example of knitting a base of a terry knitted fabric in which not only loops formed by terry yarns and binding warps are used but also loops formed by additional yarns are added. This method has the following advantages: by not only loops formed by terry yarns and binding warps are used but also loops formed by additional yarns are added, the loops of the base can be tightened without loosening the terry.

[0005] Figure 3 The figure shows knitting performed by a cam carriage equipped with two cam systems, namely, a leading cam system (SYS1) and a trailing cam system (SYS2). The yarn feed port P is a yarn feed port for the terry yarn 31, and the yarn feed port B is a yarn feed port for the binding warp 33. The terry yarn 31 is allocated to SYS1, and the binding warp 33 is allocated to SYS2.

[0006] In step (1), the knitting needles of FB and BB are advanced and retreated by SYS1 to pull in the terry yarn 31. At this time, the knitting needle of FB is pulled in to such an extent that the old loop formed in the previous row of stitches will not be unstitched from the front end of the knitting needle, and this state is maintained and it is guided to the SYS2 in the next row. By SYS2, the knitting needle of BB is not moved, but only the knitting needle of FB in the above state is advanced and retreated again to bite the binding warp 33. Thus, the knitting needle of FB pulls in both the terry yarn 31 and the binding warp 33 to unstitch the old loop, and the first row of stitches that becomes the base of the terry knitted fabric is formed.

[0007] In step (2), the additional yarn 35 is fed to the knitting needles of FB through the yarn feeder A by SYS1 to form the second row of stitches of the base knitted fabric. The knitting needles of BB are moved forward and backward by SYS2 without feeding the knitting yarn, and the pile loops formed by SYS1 in step (1) are brushed off from the knitting needles. In step (2), either knitting by SYS1 or SYS2 may be performed first. The pile knitted fabric is knitted by repeating the knitting of steps (1) and (2), but due to the standby position of each yarn feeder, an empty row of stitches is generated without knitting shown in step (3) and only the carriage moves, so that the carriage needs to move three rows of stitches to complete one cycle of knitting.

[0008] [Prior art literature]

[0009] [Patent Literature]

[0010] [Patent Document 1] Japanese Patent Publication No. 60-59333 Summary of the invention

[0011] [Problems to be solved by the invention]

[0012] exist Figure 3 In the scheme, it is necessary to adjust or remove the height position of the knitting cam in SYS1 of step (1) so that the knitting needle of FB does not unloop the old loop formed in the previous coil row from the front end of the needle. In addition, in order to weave a terry knitted fabric with additional yarn in two cam systems, the cam carriage needs to move three coil rows, and the productivity becomes extremely low. Assuming that in order to complete the knitting in one coil row of the cam carriage, a cam carriage equipped with at least four cam systems is required. Therefore, a knitting method for knitted fabrics that can be knitted efficiently is required. The object of the present invention is to provide a knitting method for terry knitted fabrics with excellent knitting efficiency.

[0013]

Methods for solving the problem

[0014] The present invention is a method for knitting terry knitted fabrics based on a flat knitting machine, using a flat knitting machine equipped with at least two cam systems on front and rear cam carriages, respectively, the front and rear cam carriages reciprocating on front and rear needle beds equipped with a plurality of knitting needles, in the cam system on the leading side, terry yarn and binding warp are supplied, and the knitting needles of one of the front and rear needle beds form a first row of coils based on the terry yarn and the binding warp to form a base for the terry knitted fabric, and the knitting needles of the other needle bed form terry loops consisting only of terry yarn on the reverse side of the base, and in the cam system on the trailing side, additional yarn is supplied to form a second row of coils following the first row, and the terry knitted fabric is knitted by repeating the above knitting, wherein,

[0015] In each triangle system, there are:

[0016] A needle raising cam having a rising cam surface for raising the butt of the knitting needle so that the knitting needle can enter; and

[0017] The knitting cam has a first pulling-in surface for lowering the needle butt, and pulls the knitting needle down.

[0018] Furthermore, in each cam system of the cam slide on the side where the loop is formed in the front and rear cam slides, a path switching cam is provided, which has a second pulling-in surface for lowering the needle butt on the leading side of the first pulling-in surface of the loop forming cam and can switch between an active state and an inactive state.

[0019] In the leading cam system, the two yarn feed ports are allocated in such a manner that the terry yarn is allocated to the leading yarn feed port and the binding warp is allocated to the trailing yarn feed port, and in the cam system for forming the terry, the path switching cam is brought into an active state, and the knitting needle bites only the terry yarn and the binding warp, and in the cam system for forming the base of the terry knitted fabric, the knitting needle bites both the terry yarn and the binding warp, thereby forming a first row of stitches that becomes the base of the terry knitted fabric,

[0020] In the cam system on the rear side, a yarn feeding port for the additional yarn is allocated on the rear side corresponding to the continuous row position of the connecting warp thread, and in the cam system on the side that brushes away the loops formed by the cam system on the leading side from the knitting needles, by making the path switching cam active, the knitting needles do not bite the additional yarn but only brush away the loops, and in the cam system on the side that forms the base of the looped fabric, the knitting needles bite the additional yarn, thereby forming a second horizontal row of coils that serves as the base of the looped fabric.

[0021] Preferably, a path switching cam is respectively provided in the front and rear cam systems so that loops can be formed in any of the front and rear cam systems, and loops are formed on the front and back surfaces of the terry knitted fabric by interweaving the horizontal rows of loops for knitting the loops by making the path switching cams of one of the front and rear cam systems active and the horizontal rows of loops for knitting the loops by making the path switching cams of the other of the front and rear cam systems active, thereby forming loops on the front and back surfaces of the terry knitted fabric.

[0022] [Effects of the invention]

[0023] In the present invention, in the course of performing terry knitting, both the terry yarn and the binding warp are pulled in by the cam system on the side that becomes the base of the knitted fabric, but in the cam system on the side that forms the terry, since the path switching cam is in the active state, only the preceding terry yarn is pulled in. As a result, the knitting of the terry yarn and the binding warp can be completed by a single cam system, and the knitting of the additional yarn and the brushing of the terry can also be completed by the subsequent single cam system. Therefore, if a flat knitting machine having at least two cam systems mounted on a cam carriage is used, even when a loop based on the additional yarn is added to the knitting of the terry knitted fabric, the course of knitting of the terry knitted fabric can be performed by a single movement of the cam carriage.

[0024] In addition, if the path switching cams are respectively provided in the front and rear cam systems, loops can be formed in any of the front and rear cam systems. Therefore, a knitted fabric with loops formed on the front and back surfaces (front and back) of the base of the knitted fabric can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a diagram showing the correspondence between the cam system (SYS1) for performing terry knitting and the knitting needles in the embodiment.

[0026] Figure 2 It is a figure which shows the cam system (SYS2) which performs pile knitting in embodiment.

[0027] Figure 3 This is a diagram showing terry knitting using a conventional flat knitting machine.

[0028] [Description of Reference Numerals]

[0029] 1 knitting needle

[0030] 3 Triangle system

[0031] 5-pin body

[0032] 7 Needle jacks

[0033] 7a needle heel

[0034] 9 needle teeth selection

[0035] 9a needle heel

[0036] 11 Needle selection

[0037] 13 Casting triangle

[0038] 13a Ascending triangle

[0039] 15 Circle triangle

[0040] 15a First pull-in surface

[0041] 17 Path Switching Triangle

[0042] 17a Second pull-in surface

[0043] 19 Pin clamp

[0044] 21 Tuck plate

[0045] 23 Path switching plate

[0046] 31 Terry yarn

[0047] 33 Warp Tie

[0048] 35 Additional Yarn

[0049] P, B, A yarn feeding port DETAILED DESCRIPTION

[0050] Hereinafter, embodiments of the present invention will be described based on the drawings.

[0051] In the embodiment, an example of a flat knitting machine using two needle beds is described. The flat knitting machine is provided with two cam systems 3 and a plurality of yarn feed ports on the front and rear cam carriages, respectively, and the front and rear cam carriages reciprocate on the FB·BB equipped with a plurality of knitting needles 1. It should be noted that the driving method of the cam and the pressing plate mounted on the cam system 3, the structure of the needle bed, the needle selection method of the knitting needle, etc. are the same as those of the well-known flat knitting machine disclosed in Japanese Patent Gazette No. 5057996, etc., and therefore the description is omitted. In addition, in the present embodiment, an example is adopted in which the path switching cams described later are respectively provided on the front and rear cam systems 3.

[0052] Figure 1 SYS1 and SYS2 have the same configuration. The knitting needle 1 has a needle body 5, a needle jack 7, a needle selection tooth 9, and a needle selection jack 11. The needle jack 7 is provided with a needle butt 7a for the advance and retreat operation of the knitting needle 1, and the needle selection tooth 9 is provided with a needle butt 9a for selecting the A, H, and B positions. In the figure, the needle selection tooth 9 is selected to the middle H position.

[0053] The cam system 3 is a cam system that can perform knitting, tucking, and floating (non-knitting), but it can also be a composite cam system that can transfer stitches. The figure shows the state of SYS1 when the cam system 3 moves to the left and knits. The cam system 3 has multiple cams that act on the butt 7a and multiple pressure plates that act on the butt 9a. The needle raising cam 13 arranged in the center and the knitting cams 15, 15 and the path switching cams 17, 17 arranged on the left and right sandwiched therebetween act on the butt 7a.

[0054] The needle raising cam 13 has a rising cam surface 13a that acts on the needle butt 7a to raise the knitting needle 1 to the loop position. The loop forming cam 15 has a first pull-in surface 15a that lowers the needle butt 7a. In normal knitting such as loop forming and tucking, the needle butt 7a is directly guided by the first pull-in surface 15a of the loop forming cam 15 through the path switching cam 17 and passes through the pull-in path (normal path). In the case of terry knitting, the needle butt 7a passes through the normal path in the cam system 3 on the side of the base of the knitted fabric that does not form terry.

[0055] The needle receiving presser 19 is arranged at the B position which is the initial position of needle selection, and presses the needle selection teeth 9 which are not selected so that the knitting needles 1 do not knit. The tucking presser 21 is arranged at the A position, and the path switching pressers 23 are arranged on the left and right of the tucking presser 21. The path switching cam 17 functions so that the knitting needles 1 bite the terry yarn 31 but not the binding warp 33, and is arranged on the upper side of the first pulling-in surface 15a of the knitting cam 15. The path switching cam 17 has a second pulling-in surface 17a which lowers the needle butt 7a.

[0056] The path switching cam 17 is set to be about half the thickness of the stitch forming cam 15 and the needle raising cam 13, and the amount of pressure on the needle butt 9a by the path switching pressing plate 23 is configured to be about half the amount of pressure on the needle receiving pressing plate 19 and the stitch collecting pressing plate 21 (a half-height pressing plate). In this case, since the needle butt 9a of the needle selection tooth 9 is pressed halfway by the path switching pressing plate 23, the needle butt 7a of the needle jack 7 also sinks halfway. As a result, the needle butt 7a passes through without being affected by the path switching cam 17 and is pulled in by the first pulling-in surface 15a of the stitch forming cam 15.

[0057] The path switching plate 23 is driven by a driving mechanism such as a solenoid, and is configured to be able to swing between an inactive position that is raised as shown on the left side of the figure and an active position (H position) that is lowered as shown on the right side of the figure. Alternatively, the path switching plate 23 may be configured to be able to switch between the active position and the inactive position by controlling the emergence and retraction of the path switching plate 23 using a driving unit such as a solenoid. With regard to the yarn feed port, the leading yarn feed port P for supplying the terry yarn 31 and the trailing yarn feed port B for supplying the binding warp 33 are moved while being maintained at the positions shown in the figure relative to the cam system.

[0058] Hereinafter, a description will be given of knitting of a terry knitted fabric by a flat knitting machine equipped with the above-mentioned cam system 3. It is assumed that the base of the terry knitted fabric is formed by the knitting needles of FB, and the terry loops are formed by the knitting needles of BB.

[0059] Figure 1The state of SYS1 for forming the base (first course) of the terry knitted fabric when the cam carriage moves to the left is shown. The butt 7a of the selection tooth of the knitting needle 1 is set at the H position, the path switching pressure plate 23 on the leading side is set at the inactive position, and the path switching pressure plate 23 on the trailing side is set at the H position. On the other hand, in the cam system (not shown) for forming the BB of the terry, the knitting needle 1 is set at the H position, and the path switching pressure plate 23 is set at the inactive position where it rises regardless of the leading or trailing movement.

[0060] At the I position, the needle butt 9a of the needle selection teeth 9 of the FB and BB to the H position is not affected by any pressure plate, so the knitting needle 1 can enter the stitching position and bite the terry yarn 31 with the needle hook. However, at the next II position, in the cam system 3 of FB that forms the base of the knitted fabric, the needle butt 9a is pressed by the path switching pressure plate 23, so the knitting needle 1 is not affected by the second pull-in surface 17a of the path switching cam 17 and passes directly. As a result, the knitting needle 1 can maintain a state substantially the same as that of the I position, and the binding warp 33 fed from the rear yarn feed port B can also be bitten by the needle hook. After that, the first pull-in surface 15a of the subsequent stitch forming cam 15 is pulled down, and the first coil row that becomes the base of the terry knitted fabric is formed by both the terry yarn 31 and the binding warp 33.

[0061] On the other hand, in the cam system 3 for forming the BB of the pile, since the path switching plate 23 is in the inactive position, the needle butt 9a is further pulled down by the first pulling-in surface 15a of the stitch forming cam 15 after being pulled down along the second pulling-in surface 17a of the path switching cam 17. That is, the knitting needle 1 is pulled down before the binding warp 33 is supplied, so that only the pile yarn 31 is hooked on the knitting needle 1.

[0062] Figure 2 The state of SYS2, which forms the base (second row of stitches) of a terry knitted fabric, is shown. SYS2 is in the same state as SYS1 except that a yarn feed port A for the additional yarn 35 is allocated on the rear side corresponding to the continuous row position of the binding warp 33 in SYS1. That is, at the I position, the butt 9a of the needle selection tooth 9 selected to the H position of FB and BB is not affected by any pressure plate, so the knitting needle 1 enters the stitch forming position. However, at the next II position, the butt 9a of FB, which forms the base of the knitted fabric, is pressed by the path switching pressure plate 23 and passes directly without being affected by the second pulling-in surface 17a of the path switching cam 17. As a result, the knitting needle 1 maintains a height substantially the same as that at the I position, so after the additional yarn 35 from the yarn feed port A is bitten by the needle hook, it is pulled down by the first pulling-in surface 15a to form the second row of stitches that become the base of the terry knitted fabric.

[0063] On the other hand, since the path switching plate 23 is in the inactive position, the needle butt 9a is further pulled down by the first pulling surface 15a after being pulled down along the second pulling surface 17a of the stitch switching cam 17. That is, the knitting needle 1 is pulled down before receiving the supply of the additional yarn 35, so the pile loop formed by SYS1 is brushed off from the knitting needle.

[0064] In order to perform such an operation, two cam systems are used, SYS1 performs knitting based on the terry yarn 31 and the binding warp 33, SYS2 does not feed yarn to the knitting needle 1 of BB that has the terry hooked, but advances and retreats, removes the terry from the knitting needle 1, and knits the knitting needle 1 of FB with the additional yarn 35 in a row, so that the knitting can be completed by one movement (one row) of the cam carriage. By repeating such knitting, it is possible to knit a terry knitted fabric (single-sided terry) having terry on the back side of the base of the knitted fabric with greatly improved productivity compared with the past.

[0065] The path switching cams 17 may be provided in the front and rear cam systems 3, respectively, so that loops can be formed in both the front and rear cam systems 3. By interweaving and knitting the loops knitted by making the path switching cams 17 of one of the front and rear cam systems 3 active and the loops knitted by making the path switching cams 17 of the other front and rear cam systems 3 active in each row of the movement of the cam carriage, a loop knitted fabric having loops on both the front and back sides of the base of the knitted fabric (double-sided loops) can be knitted.

[0066] In addition, the knitting method of the present application can also be applied to the knitting of a tubular knitted fabric based on a terry loop with a needle. When the terry loop is formed on the inside of the tubular knitted fabric, the knitting is performed in the same manner as the above-mentioned knitting method, and each of the front and rear knitted fabrics can be knitted by one movement (one row of stitches) of the cam carriage. When the terry loop is formed on the outside of the tubular knitted fabric, a cam carriage having a composite cam system with four units that can also transfer stitches is used, and each of the front and rear knitted fabrics can be knitted by one movement (one row of stitches) of the cam carriage.

Claims

1. A knitting method for terry knitted fabric based on a flat knitting machine, A flat knitting machine is used in which front and rear cam carriages are provided with at least two cam systems, including a leading cam system, i.e., a leading cam system, and a trailing cam system, i.e., a trailing cam system, respectively. The front and rear cam carriages reciprocate on front and rear needle beds (FB, BB) provided with a plurality of knitting needles (1). Assume that the leading side cam system and the trailing side cam system of one of the front and rear cam carriages are the first leading side cam system and the first trailing side cam system, respectively, and the leading side cam system and the trailing side cam system of the other front and rear cam carriages are the second leading side cam system and the second trailing side cam system, respectively. The first leading cam system and the second leading cam system supply a terry yarn (31) and a binding warp thread (33), and the knitting needles (1) of one of the front and rear needle beds form a first row of loops that serve as a base for a terry knitted fabric from loops based on the terry yarn (31) and the binding warp thread (33). The knitting needles (1) of the other of the front and rear needle beds form loops consisting of only the terry yarn (31) on the reverse side of the base. The first trailing cam system and the second trailing cam system supply an additional yarn (35) to form a second row of loops that follows the first row of loops. The terry knitted fabric is knitted by repeating the above knitting. The method for knitting a terry knitted fabric based on a flat knitting machine is characterized in that: In each triangle system, there are: A needle raising triangle (13) having a rising triangle surface (13a) for raising the butt (7a) of the knitting needle (1) so that the knitting needle (1) can enter; and The knitting cam (15) has a first pulling-in surface (15a) for lowering the needle butt (7a), thereby pulling the knitting needle (1) down. Furthermore, in the leading side cam system of the cam slide on the side where the loop is formed in the front and rear cam slides, i.e., the second leading side cam system, a path switching cam (17) is provided. The path switching cam (17) has a second pulling-in surface (17a) for lowering the needle butt (7a) on the leading side of the first pulling-in surface (15a) of the loop forming cam (15) and can switch between an active state and an inactive state. In the first leading side triangle system and the second leading side triangle system, The two yarn feed ports (P, B) are allocated in such a manner that the terry yarn (31) is allocated to the leading yarn feed port (P) and the binding warp thread (33) is allocated to the trailing yarn feed port (B), and in the leading cam system for forming the terry, i.e., the second leading cam system, the path switching cam (17) is activated, and the knitting needle (1) only bites the terry yarn (31) and the binding warp thread (33). In the leading cam system for forming the base of the terry knitted fabric, i.e., the first leading cam system, the knitting needle (1) bites both the terry yarn (31) and the binding warp thread (33), thereby forming a first row of stitches that becomes the base of the terry knitted fabric. In the first rear side triangle system and the second rear side triangle system, A yarn feed port (A) for the additional yarn (35) is allocated on the rear side corresponding to the continuous position of the connecting warp thread (33), and in the cam system on the side where the loops formed by the second leading side cam system are brushed away from the knitting needle (1), that is, the second rear side cam system, by making the path switching cam (17) active, the knitting needle (1) does not bite the additional yarn (35) but only brushes away the loops, and in the rear side cam system on the side where the base of the looped terry knitted fabric is formed, that is, the first rear side cam system, the knitting needle (1) bites the additional yarn (35), thereby forming a second horizontal row of coils that serves as the base of the looped terry knitted fabric.

2. The knitting method of terry knitted fabric based on a flat knitting machine according to claim 1, characterized in that: A path switching cam (17) is provided in the first leading side cam system and the second leading side cam system respectively so that loops can be formed in any of the front and rear leading side cam systems, and loops are formed on the front and back sides of the loop knitted fabric by interlacing and knitting the horizontal rows of loops knitted by making the path switching cam (17) of the first leading side cam system active and the horizontal rows of loops knitted by making the path switching cam (17) of the second leading side cam system active.

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