JP3192202B2 - Weft knitting method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for knitting a weft knitted fabric having a good texture with less damage to a yarn to be knitted using an industrial knitting machine.

[0002]

2. Description of the Related Art A conventional industrial knitting machine feeds yarn to a knitting needle by operating a yarn feeder with a carriage, and the knitting needle guides a butt of the knitting needle to a cam groove of a cam built in the carriage. Knitting operation to form a loop by catching the yarn supply. The carriage having a built-in cam needs to reciprocate in parallel with the knitting bed surface in order to operate the yarn feeder. Naturally, the cam built in the carriage also reciprocates in parallel with the bed surface.

On the other hand, the knitting needles need to reciprocate at right angles to the bed surface in order to perform a knitting operation for forming a loop by catching the yarn supply. Has the role of converting the operation of the cam moving parallel to the knitting needle into the operation of the knitting needle moving at right angles to the bed. A large impact force is applied between the butt and the cam groove, which is a contact point for the change of the motion direction, and sometimes a trouble such as breakage of the bat or damage to the cam groove may occur. Although this impact force depends on the speed of the carriage, it is structurally determined by the angle of the cam groove with respect to the direction of movement of the cam, that is, the cam angle.

On the other hand, the portion of the cam groove for causing the knitting needle to perform the knitting operation of forming a loop by catching the yarn supply is called a down cam, which is the most important portion in knitting, and the cam angle of the down cam portion is as described above. Generally, it is at most about 50 degrees for a reason or the like. Therefore, depending on the gauge of the knitting machine, generally, a plurality of knitting needles are going to descend for knitting motion along the groove of the lowering cam, and the yarn is simultaneously pulled down by two or three knitting needles. Will be tried. Conventionally, the yarn is knitted in such a manner that the yarn is bent and squeezed between these two or three needles and the sinker portion existing between the needles to finally form a loop. It is a method of knitting a weft knitted fabric by technology.

[0005]

In the case of knitting a weft knitted fabric according to the prior art as described above, the yarn to be fed is bent by a plurality of needles and sinkers and then tightened. In the stage of forming, excessive tension is applied. For this reason, there has been a problem in that the soft hand inherent to the yarn for knitting such as spun yarn is impaired and the hand-knitted hand cannot be obtained by machine knitting.

[0006] In addition, yarns with poor slippage, such as hemp yarns, and yarns that are easily broken, such as weakly twisted yarns, have a problem in that machine knitting tends to cause errors due to yarn breakage. The present invention solves such problems caused by the prior art, and knits a weft knitted fabric having the same texture as hand-knitting without impairing the good texture originally possessed by the yarn, or has conventionally made it difficult to knit the machine. For example, it is an object of the present invention to provide a method of knitting a weft knitted fabric that enables knitting of a thread that is easy to be cut as necessary.

[0007]

In order to solve the above-mentioned problems, the present invention provides a knitting machine having a knitting bed on which a plurality of knitting needles each having an actuator are arranged. This is achieved by knitting the weft knitted fabric in a knitting pattern in which the hook of the next knitting needle catches the supply of yarn after the knitting operation of forming the loop by the second needle catching the yarn supply is completed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. The knitting machine used was a knitting machine described in "Knitting Method of Weft Knitted Fabric" in Japanese Patent Publication No. 01-012855, and the gauge was a 6 gauge machine. The knitted fabric has a flat knitting structure. FIG. 2 is a view of a knitting portion in an embodiment of the knitting method according to the present invention when viewed from above at right angles to the knitting bed surface.

In the knitting method according to the present invention, as shown in FIG. 2, a plurality of knitting needles N arranged on the knitting bed 1 are individually provided with actuators (not shown), and are separately driven. The yarn 3 supplied from the leading end of the knitting 2 is caught by the hook H of each knitting needle to form a loop L to knit a knitted fabric having a flat knitting structure. Yarn feeder represents the position of the hook of the knitting needle before and after when the leading end of the yarn feeder is moved to the left as indicated by arrow comes to the position of the knitting needle N ₃ with a broken line in FIG. The pattern indicated by the broken line 4 is a so-called knitting pattern, and the operation of each knitting needle is controlled by each actuator by a control device (not shown) so that the knitting pattern follows the movement of the yarn feeder. This knitting pattern corresponds to a cam groove pattern according to the prior art using the cam system, and the angle θ shown in the figure also corresponds to a cam angle according to the prior art.

Now, as shown in FIG. 2, the knitting needle No. catches the yarn supply 3 and then lowers the yarn supply 3 to reduce the loop Lo.
Is completely formed, the hook H1 of the next knitting needle N1 has not yet caught the yarn supply 3. Accordingly, the yarn supply 3 is directly supplied to the formation of the loop Lo by the hook Ho of the knitting needle No without being bent halfway after exiting from the tip of the yarn supply port 2. Therefore, sera bent by the hook h1, h2 of the yarn feeding 3 knitting needles n1 or n2 so far knitting Naruhari no as knitting method according to the prior art shown in FIG. 1 to form a complete loop lo <br / It has become possible to form a loop in a state in which the yarn feed is more natural, without being damaged by, for example, receiving large frictional resistance. At this time, the angle θ was about 70 degrees.

In the embodiment , a flat yarn with a very common yarn is used.
An example of knitting structure was described, but other types such as weak twisting
When weaving weak yarn easily, or conversely, for example, metal wire,
When weaving hard-to-bend materials such as carbon fiber
For example, the knitting method of the present invention is very effective.

[0012]

According to the present invention, the following effects are obtained.
During the knitting operation, the yarn supply locked to a certain knitting needle is
Between the knitting needle and the yarn feeder, hook the hook of another knitting needle.
Since the thread is not locked and bent,
Without receiving the sliding resistance from the hook of the knitting needle
The yarn is pulled out in a state close to nature, forming a loop
It becomes possible to do. As a result, knitting according to the prior art
Less knitting after knitting the finished knitted fabric
It always has a plump, hand-knitted texture, and is also machine-knit
Due to the yarn going right and left
It has a very beautiful flat knitting structure with no snake
Knitted fabric can be knitted. Also easy to cut such as weak twisted yarn
When weaving weak yarns or vice versa
When weaving materials that are difficult to bend, such as
Also, the operations of yarn feeding and knitting can be smoothly advanced. Also the yarn feeder
The knitting needles according to the present invention.
Slower to follow the knitting pattern
The hook catches the supply yarn and pulls it down to form a loop
Knitting that is even easier on yarn by reducing the impact force when
I can do it.

[Brief description of the drawings]

FIG. 1 is a diagram showing a relationship between a yarn supplied and a movement of a knitting needle when knitting is performed by a conventional technique using a cam system.

FIG. 2 is a diagram for explaining a relationship between a knitting pattern and yarn supply according to one embodiment of the present invention.

[Explanation of symbols]

1 knitting bed 2 yarn feeder 3 yarns _{n o ~n 6, N 0 ~N} 3 knitting needle _{h 1 ~h 6, H 0 ~H} 2 knitting needle hook

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) D04B 1/00-15/99

Claims (1)

(57) [Claims] 1. A weft knitting machine in which a plurality of knitting needles arranged in a knitting bed are operated by actuators provided for each knitting needle. After the knitting operation of lowering the yarn supply and forming a loop is completed, the knitting needle is operated in a knitting pattern in which the hook of the Nth next knitting needle catches the yarn supply to knit a weft knitted fabric. <br>/> How to knit the knitted fabric.