CN113584692B

CN113584692B - Method for knitting terry knitted fabric by flat knitting machine

Info

Publication number: CN113584692B
Application number: CN202110474749.XA
Authority: CN
Inventors: 奥野昌生
Original assignee: Shima Seiki Mfg Ltd
Current assignee: Shima Seiki Mfg Ltd
Priority date: 2020-04-30
Filing date: 2021-04-29
Publication date: 2023-02-17
Anticipated expiration: 2041-04-29
Also published as: JP7438011B2; JP2021172934A; CN113584692A

Abstract

The invention provides a knitting method of a terry knitted fabric based on a flat knitting machine. Knitting based on the pile yarns and the binding warp yarns can be completed by a single cam system, thereby efficiently knitting the pile knitted fabric. In a stitch course for loop knitting, a route switching cam (17) is set to an active state in a cam system (3) on the side where a loop is formed, a knitting needle (1) hooks only a loop yarn (31) and a loop yarn (31) in a binding warp (33), and the knitting needle (1) hooks both the loop yarn (31) and the binding warp (33) in the cam system (3) on the side where a base of the loop knitted fabric is formed, thereby knitting the loop knitted fabric on a flat knitting machine.

Description

Method for knitting terry knitted fabric by flat knitting machine

Technical Field

The present invention relates to a method for knitting a pile fabric by a flat knitting machine.

Background

The loop knitted fabric is a knitted fabric in which a base of the loop knitted fabric is formed by stitches based on a loop yarn and tying warps (1247112513a) by a knitting needle of one of a front needle bed (FB) and a rear needle bed (BB), and a loop composed only of the loop yarn is formed by a knitting needle of the other needle bed on the reverse side of the base.

Patent document 1 discloses a method of knitting a pile fabric with a flat knitting machine provided with a sinker device. However, the knitting method of the pile knitted fabric described in patent document 1 cannot be formed in a flat knitting machine which does not have a sinker device for pulling out a pile yarn.

Fig. 2 shows a knitting method of a loop knitted fabric by a method different from patent document 1. This method is performed using a carriage on which 2 cam systems (SYS 1, SYS 2) are mounted. The base of the pile knitted fabric is formed by the knitting needle of FB, and the pile is formed by the knitting needle of BB. 2 yarn feeders P for the lock yarn 31 and 2 yarn feeders B for the binding warp 33 are prepared, the lock yarn 31 is distributed to the preceding cam system (SYS 1), and the binding warp 33 is distributed to the following cam system (SYS 2).

In SYS1, the knitting needles of FB and BB are advanced and retreated to draw the loop yarn 31. At this time, the old loop formed in the previous course is pulled in to such an extent that the old loop does not slip over the front end of the knitting needle, and the knitting needle of FB is guided to the SYS2 of the back row while maintaining this state. In SYS2, the knitting needle of BB is not operated, and only the knitting needle of FB in the above state is again advanced and retreated to hook the warp binder 33. Thereby, the knitting needle of the FB pulls in both the loop yarn 31 and the tying warp 33 to thereby unravel the old loop. Although not shown, the knitting yarn is not fed to the knitting needle of BB but advanced and retreated, and the loop yarn 31 pulled in the SYS1 is separated from the knitting needle to form a loop. The loop knitted fabric is knitted by repeating such knitting.

[ Prior Art document ]

[ patent document ]

[ patent document 1 ] Japanese examined patent publication No. Sho 60-59333

Disclosure of Invention

In the knitting according to the above-described method, in SYS1, it is necessary to adjust the position of the stitch cam or to remove the needle of the FB in order to prevent the old stitch formed in the front course from being dropped from the needle tip. Further, since 2 triangulation systems are required, there is a problem of low productivity and the like.

In a method of knitting a pile fabric by a flat knitting machine according to the present invention, a pile yarn and a binding warp yarn are supplied to a flat knitting machine equipped with a carriage that reciprocates on front and rear needle beds on which a plurality of knitting needles are arranged, a base of the pile fabric is formed by a knitting needle of one needle bed with a loop based on the pile yarn and the binding warp yarn, and a pile constituted only by the pile yarn is formed on a reverse side of the base by a knitting needle of the other needle bed, thereby knitting the pile fabric,

a needle raising cam and a yarn bending cam are provided in a cam system mounted on the front and rear sides of a carriage,

the needle raising cam has a raising cam surface for raising a butt provided to the knitting needle to let the knitting needle enter,

the sinking cam has a 1 st draw-down surface for lowering the butt to draw down the knitting needle,

and the front side yarn feeder is distributed with terry yarn, the rear side yarn feeder is distributed with binding warp yarn,

in the cam system on at least one side where the loop is formed, a route switching cam is provided which has a 2 nd pulling-down surface for lowering the butt on a preceding side of the 1 st pulling-down surface of the stitch cam and is capable of switching between an active state and an inactive state,

in the course where the loop knitting is performed,

in the cam system on the side of forming the loop, the route switching cam is made to be in an active state and the knitting needle hooks only the loop yarn of the loop yarn and the binding warp, and in the cam system on the side of forming the base of the loop knitted fabric, the knitting needle hooks both the loop yarn and the binding warp.

In order to form the pile on both the front and rear cam systems, route switching cams are provided on the front and rear cam systems, respectively, and a course for performing pile knitting by bringing the route switching cam of one of the front and rear cam systems into an active state and a course for performing pile knitting by bringing the route switching cam of the other of the front and rear cam systems into an active state are mixed and knitted, thereby forming the pile on the front and back surfaces of the pile knitted fabric.

[ Effect of the invention ]

In the present invention, in a course for loop knitting, both the loop yarn and the binding warp yarn can be pulled in the cam system on the side to be the base of the knitted fabric, but in the cam system on the side to form the loop, only the preceding loop yarn is pulled in because the course switching cam is in an active state. As a result, knitting by the pile yarns and the binding warp yarns can be completed by the single cam system, and the pile knitted fabric can be efficiently knitted.

Since the route switching cams are provided in the front and rear cam systems, the loop can be formed in both the front and rear cam systems. Therefore, a knitted fabric having loops formed on the front and back surfaces (front and back) of the base of the knitted fabric can be obtained.

Drawings

Fig. 1 is a schematic explanatory view showing a correspondence relationship between knitting needles and a cam system for performing the loop knitting according to the embodiment.

Fig. 2 is a diagram showing conventional pile knitting by a flat knitting machine.

[ Mark Specification ]

1. Knitting needle

3. Triangular system

5. Needle body

7. Needle jack 7a butt

9. Needle selection bottom leg sheet 9a butt

11. Needle selection piece

13. Rising cam surface of needle raising cam 13a

15. Draw-down surface 1 of the stitch cam 15a

17. Route switching cam 17a No. 2 pull-down surface

19. Floating line pressing sheet

21. Tucking preforming

23. Route switching sheeting

31. Loop yarn

33. Binding warp

P, G yarn feeding port

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Hereinafter, an example using a two-bed flat knitting machine will be described in the embodiment. The flat knitting machine includes a needle bed on which a plurality of knitting needles 1 are arranged, a carriage on which a cam system 3 for driving the knitting needles 1 is mounted, and a plurality of yarn feeders for feeding knitting yarns to the needle bed. The cams mounted on the cam system 3, the driving method of the presser, the structure of the needle bed, the needle selecting method of the knitting needles, and the like are the same as those of the known flat knitting machine disclosed in japanese patent No. 5057996 and the like, and therefore, the description thereof is omitted. In the present embodiment, the following triangle system 3 is taken as an example: the path switching cams described later are provided in the front and rear cam systems 3, respectively, so that the pile can be formed on the front and back surfaces (front and rear surfaces) of the base of the pile knitted fabric.

Fig. 1 is a schematic explanatory view showing a correspondence relationship between a knitting needle 1 and a cam system 3. The knitting needle 1 includes a needle body 5, a needle jack 7, a needle selection jack 9, and a selector 11. The needle jack 7 is provided with a butt 7a for forward and backward operation of the knitting needle 1, and the select jack 9 is provided with a butt 9a for selecting positions a, H, and B. In the figure, the select jack 9 is selected at the intermediate H position.

The cam system 3 in fig. 1 is a cam system capable of performing stitch formation, tucking, and floating, but may be a composite cam system capable of performing stitch transfer. The figure shows a state in which the cam system 3 travels leftward and performs knitting. The cam system 3 includes a plurality of cams that act on the butt 7a and a plurality of tablets that act on the butt 9a. The raising cam 13 arranged at the center, and the

stitch cams

15, 15 and the

course switching cams

17, 17 provided on the left and right across the raising cam 13 act on the butt 7a.

The needle raising cam 13 includes a raising cam surface 13a that acts on the butt 7a to raise the knitting needle 1 to the knitting position. The sinking cam 15 includes a 1 st pulling-down surface 15a for lowering the butt 7a. In normal knitting such as stitch forming and tucking, the butt 7a is guided by the 1 st pulling-down surface 15a of the stitch cam 15 to pass through the pull-in course (normal course) without stopping while passing through the course switching cam 17. In the case of performing the loop knitting, the butt 7a is passed through a normal course in the cam system 3 knitting the side to be the base of the knitted fabric where no loop is formed.

The float presser 19 is arranged at a position B which is an initial position for needle selection, and presses the select jack 9 which is not selected to make the knitting needle 1 knit. The tucker presser 21 is disposed at a position a, and route switching pressers 23 are provided on the left and right thereof. The course switching cam 17 is operated so that the knitting needle 1 hooks the pile yarn 31 but does not hook the binder warp 33, and is disposed above the 1 st pulling-down surface 15a of the stitch cam 15. The course switching cam 17 includes a 2 nd drawing-down surface 17a that lowers the butt 7a on the leading side of the 1 st drawing-down surface 15a.

The stitch switching cam 17 is formed to have a thickness of about half of the stitch cams 15 and the raising cams 13, and the pressing amount of the stitch switching presser 23 against the butt 9a is about half of the float presser 21 and the tuck presser 21 (half-height presser). In this case, the butt 9a of the select jack 9 is pushed by half by the route switching presser 23, and therefore the butt 7a of the needle jack 7 also sinks by half. As a result, the butt 7a passes without being affected by the stitch switching cam 17 and is pulled in by the 1 st pulling-down surface 15a of the stitch cam 15.

The route switching sheet 23 is driven by a driving means such as a solenoid, and is configured to be swingable between a raised inoperative position shown on the left side of the drawing and a lowered operative position (H position) shown on the right side of the drawing. Instead of the above, the route switching cam 17 may be controlled by a driving means such as a solenoid to be switchable between the operating position and the non-operating position. In this case, the route switching sheet 23 does not need to be provided. Regarding the yarn feeder, the preceding yarn feeder P for supplying the lock yarn 31 and the succeeding yarn feeder B for supplying the binding warp 33 are moved while being held at the positions shown in the drawing with respect to the triangular system.

A method of knitting a terry knitted fabric using the flat knitting machine including the cam system 3 described above will be described below. In the following example, the base of the terry knitted fabric is formed by the knitting needle of FB, and the terry is formed by the knitting needle of BB.

As shown in fig. 1, when the cam system 3 travels leftward, in the cam system 3 of the FB forming the base of the loop knitted fabric, the butt 9a of the select jack 9 of the knitting needle 1 is set at the H position, the preceding-side route switching presser 23 is set at the inactive position, and the succeeding-side route switching presser 23 is set at the H position. On the other hand, in the cam system (not shown) for forming the BB of the pile, the knitting needle 1 is disposed at the H position, and the route switching presser 23 on both the preceding side and the succeeding side is disposed at the raised inactive position.

In the I position, the butt 9a of the needle selection jack 9 selected in the H position of the FB, BB is not acted by any presser, and therefore the knitting needle 1 enters up to the knitting position and can hook the pile yarn 31 with the hook. However, in the subsequent position II, in the cam system 3 forming the FB of the base of the knitted fabric, the butt 9a receives the pressing action of the course switching presser 23, and therefore the knitting needle 1 is not subjected to the action of the 2 nd pull-down face 17a of the course switching cam 17 over and over. As a result, the knitting needle 1 can hook the binding warp 33 supplied from the succeeding feeder B with the hook while keeping the same position as the I position. Then, the yarn is pulled down by the 1 st pulling-down surface 15a of the subsequent stitch cam 15 to form a stitch by both the bind-off yarn 31 and the binding warp 33. On the other hand, in the cam system 3 for forming the BB of the loop, since the course switching presser 23 is located at the inactive position, the butt 9a is pulled down along the 2 nd pulling-down face 17a of the stitch switching cam 17, and then is further pulled down by the 1 st pulling-down face 15a of the stitch cam 15. That is, the knitting needle 1 is pulled down before being fed with the tying warp 33, and therefore, only the loop yarn 31 is hooked by the knitting needle 1.

Due to this operation, knitting by the pile yarn 31 and the binding warp 33 can be performed by the single cam system 3. Then, the knitting needle 1 with the loop BB hooked thereon is advanced and retreated without feeding the knitting yarn, and the loop yarn is separated from the knitting needle 1. By repeating such knitting, a loop knitted fabric (single-sided loop) having loops on the back side of the base of the knitted fabric can be knitted. A terry knitted fabric (double-sided pile) having piles on both the front and back sides of the base of the knitted fabric can also be knitted by switching the knitting system 3 for forming piles back and forth for each course and knitting the knitted fabric.

In the above description, the single-color loop fabric is knitted by 2 knitting yarns of the loop yarn and the binding warp, but if two different loop yarns of two colors and two yarn feeders are prepared and knitted, the two-color loop fabric can be knitted. In this case, the 2 nd loop yarn can be used as the binding warp yarn in the triangle system for forming the 1 st loop, and the 1 st loop yarn can be used as the binding warp yarn in the triangle system for forming the 2 nd loop. The binding warp as used herein refers to a yarn that forms a stitch by pulling a loop yarn together with a knitting needle, and may be a different type of yarn from the loop yarn or the same type of yarn. In the above-described embodiment, the example of the cam system in which the route switching cams are provided at the front and rear sides, respectively, is shown, but in the case of knitting a loop knitted fabric in which a loop is formed only on one of the front and rear sides of the base of the knitted fabric, the route switching cam may be provided only on one of the front and rear cam systems.

Claims

1. A method of knitting a pile fabric by a flat knitting machine, in which a pile yarn (31) and a tying warp (33) are supplied to the flat knitting machine provided with a carriage that reciprocates on front and rear needle beds on which a plurality of knitting needles (1) are arranged, a base of the pile fabric is formed by a loop based on the pile yarn (31) and the tying warp (33) with the knitting needle (1) of one needle bed, and a pile constituted only by the pile yarn is formed on the reverse side of the base with the knitting needle of the other needle bed, thereby knitting the pile fabric, characterized in that,

a needle raising cam (13) and a stitch cam (15) are provided in a cam system (3) mounted on the front and rear sides of a carriage,

the needle raising cam (13) has a raising cam surface (13 a) for raising a butt (7 a) provided to the knitting needle (1) and causes the knitting needle (1) to enter,

the stitch cam (15) has a 1 st draw-down surface (15 a) for lowering the butt (7 a) and draws down the knitting needle (1),

further, a pile yarn (31) is distributed to the front side yarn feeder (P), a binding warp (33) is distributed to the rear side yarn feeder (G),

in the cam system (3) of the cam system (3) at least forming one side of the terry, a route switching cam (17) is provided, the route switching cam (17) has a 2 nd drawing surface (17 a) for lowering the butt (7 a) at a leading side of the 1 st drawing surface (15 a) of the stitch cam (15), and can be switched between an active state and an inactive state,

in the course where the loop knitting is performed,

in the cam system (3) on the side of forming a pile, the course switching cam (17) is made to be in an active state, and the knitting needle (1) hooks only the pile yarn (31) of the pile yarn (31) and the binding warp (33), and in the cam system (3) on the side of forming the base of the pile knitted fabric, the knitting needle (1) hooks both the pile yarn (31) and the binding warp (33).

2. The method of knitting a pile fabric based on a weft knitting machine according to claim 1,

in order to form terry loops on both the front and rear cam systems (3), route switching cams (17) are provided on each of the front and rear cam systems (3), and the course of terry knitting is performed by mixedly knitting the course of terry knitting with the route switching cam (17) of one of the front and rear cam systems (3) in an active state and the course of terry knitting with the route switching cam (17) of the other of the front and rear cam systems (3) in an active state, thereby forming terry loops on the front and back surfaces of the terry knitted fabric.