JPH0146622B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cut pile fabric knitted by a warp knitting machine of a double lattice machine exclusively for cut pile, and particularly to a method for knitting a cut pile fabric knitted using spun single yarn as the pile yarn. It is something.

[Prior art and its problems] Conventionally, cut pile fabrics that are mainly used on the pile surface and are suitable for use as blankets, etc.
The yarn used for the pile is a double yarn or a composite yarn with entwined filaments, etc., and cut pile fabrics that use pure spun single yarn as the pile yarn have never existed. The reason for this is that when regular spun single yarns are used as pile yarns in knitting with the existing double lattice machine dedicated to cut piles, adjacent yarns get entangled with each other near the knitting needles, resulting in yarn breakage, as described below. This is because it will be completely impossible to organize the earth.

In other words, the knitting of the above cut pile fabric is as follows:
This machine mainly uses a double ratchet machine exclusively for cut piles with the structure shown in Fig. 1, in which 1 and 2 are knitting needles on the front and rear needle beds, 3 and 3 are trick plates on the front and rear needle beds, and 4 and 4 are on the front side and knitting needles. Stitch comb on the back side, L1 and L2 are the insertion thread reed and chain thread reed on the front side, L3 is the pile thread reed, L
4.L5 shows the chain thread reed and insertion thread reed on the back side,
The reeds L1, L2 and L4, L5 guide the inserted thread and chain thread to the front and rear needle beds, respectively, to form a ground texture on both the front and back sides, and the reed L in the center
3, the pile yarn is guided to the front and rear needle beds, and the pile yarn is wrapped around the knitting needles 1 and 2 to knit.The pile yarn is cut at the center between the front and back fabrics thus knitted, and then knitted. Later, the cut pile surface is raised to make a blanket or the like.

However, when considering the mechanism of yarn breakage when using spun single yarn in the above knitting, it is found that the pile yarn extends from the needle head to the top through the reed and guide, and the movement of the reed (wrapping movement) The pile yarn is passed over the front and rear knitting needles, and at this time rotation is imparted to the pile yarn above the knitting needles. Moreover, pile yarns are usually arranged at intervals of 2/12" to 2/20", but if the pile yarn is spun yarn, fluff comes out from the yarn, so adjacent yarns always have fluff. Therefore, when each thread rotates due to the above-mentioned wrapping effect, the fluff of the threads is wrapped around each other, causing the threads to pull together, resulting in thread breakage. . Therefore, such a phenomenon does not occur with filament yarns without fluff. Furthermore, the problem of yarn breakage does not occur in the case of spun twin yarns, which are currently commonly used as pile yarns, because spun double yarns require a large torque for twisting and untwisting. The propagation of the associated twist is extremely small, making it difficult for the yarn to rotate.Therefore, even if adjacent yarns touch each other, the yarn does not rotate and breakage due to the phenomenon of fuzz entrainment does not occur.

However, when a Z-twisted single yarn, which is currently commonly used as a spun single yarn, is used as a pile yarn, for example, in knitting a pile fabric as shown in the organization chart in Figure 2, the reed L3 of the pile yarn undergoes a wrapping movement. As shown in Fig. 3, for the knitting needles of front and back needle rows F and B, →→→
It is wrapped and knitted in the order of , and at this time, even if twisting occurs in the untwisting direction of the S twist with respect to the Z twist single yarn due to the rotation accompanying the wrapping action in the knitting needles on the back side and . The twist propagation force is small, and when the pile yarn reed swings back, the yarn tension remains strong due to the relationship with the pile yarn supply position, and the yarn overwraps and moves to the front swing, causing the fluff to come into contact with each other. The extent to which the fluff gets entangled with each other is very small, and at point b, the swing is performed in a straight line, so the yarn does not become loose, and at point d, the longest stroke is taken in the same amount of time, so the yarn is Although there is tension and the yarns do not pull together, the knitting needles on the front side and the
Since the wrapping direction is clockwise, the rotation associated with the wrapping action causes the Z-twist single yarn to become Z-twist, that is, twist in the twisting direction, so that the fluff becomes more entangled with each other, and at the same time, when the yarn tension decreases. As a result of overlapping, the threads loosen slightly at points a and c, causing fluff to become entangled, and as a result, adjacent threads are tightly pulled together and tangled, which is the main cause of thread breakage.

Therefore, the pile yarns of this type of cut pile fabric are actually spun double yarns, which are considerably more expensive than single yarns, resulting in extremely high costs. Therefore, it is a common desire of those involved in the production of cut pile fabrics of this type to be able to use ordinary spun single yarns in order to reduce costs.

In view of the above, the present invention was developed as a result of extensive research and consideration, with the aim of making it possible to use relatively inexpensive spun single yarns as pile yarns in knitting cut pile fabrics using a double lattice machine. Yarn breakage is related to the twisting direction of the yarn, the wrapping direction with respect to the knitting needle, and the yarn tension,
It has been found that if the wrapping direction of the front needle bed relative to the knitting needles is counterclockwise, yarn breakage does not occur even in Z-twisted single yarns, and the present invention has been made based on this knowledge.

[Means for Solving the Problems] That is, in the present invention, in order to solve the above problems, a pile yarn consisting of a Z-twisted spun single yarn is knitted with two or more knitting needles on each of the front and rear needle beds using a double ratchet machine. When knitting with the front and back fabrics by sequential wrapping, the wrapping direction of the pile yarn with respect to the knitting needles on the front needle bed is counterclockwise, and it is particularly preferable to use the front side where the underwrapping moves by one stitch. The pile structure is such that the wrapping direction of the needle bed relative to the knitting needles is clockwise, and the left and right sides are opposite to each other.

[Function] According to the method of the present invention as described above, even if a Z-twist spun single yarn is used as the pile yarn, the wrapping direction is counterclockwise at the front side knitting needle portion. The rotation imparted by this wrapping action causes the Z-twisted single yarn to twist in the S-twist direction, that is, in the untwisting direction. Even if they touch each other, the force of the yarns wrapping around each other's fluff is small due to the direction of untwisting, so even if the tension in the yarns is loosened during this wrapping action, the degree to which the two yarns will pull together is very small. This prevents thread breakage.

In addition, in the knitting needle part on the back side, the pile yarn Z is rotated by the wrapping action in the clockwise direction.
The twisted spun single yarn is subjected to a Z twist, that is, a twist in the burning direction, which increases the propagation force of the twist in the yarn and the degree of fuzz entrainment, but the backswing causes overtwisting while the yarn tension remains. , Moreover, does the movement of the pile yarn reed from the back side to the front side knitting needle part result in a linear swing?
Alternatively, the distance of movement becomes long and fast, and the tension of the threads does not loosen, so the degree of entanglement of adjacent threads due to fluff is extremely small, and therefore no thread breakage occurs.

[Example] The organization chart in FIG. 4 shows the decomposed wrapping movement of the insertion yarn reed L1, chain yarn reed L2, pile yarn reed L3 on the front side, and the chain yarn reed L4 and insertion yarn reed L5 on the back side. By rearranging the chain link, the second
The conventional pile structure shown in the figure, that is, a structure in which the wrapping direction with respect to the front knitting needles is clockwise, is created with a structure that is exactly opposite on the left and right, and the wrapping direction is counterclockwise with respect to the front knitting needles. In this knitting structure, a Z-twist spun single yarn of numbers 10 to 16 with a twist coefficient of 45 to 90, preferably 60 to 70 is used as the pile yarn P, and a cut pile exclusive yarn is used. It is organized using a double ratchet machine. In addition, in this case, the reed L
The threading direction of the third class must be a direction that allows the thread to be easily pulled out when overlapping the knitting needles. Therefore, in the present invention, the reed movement is opposite to the conventional one, and the thread is threaded through the threading hole of the reed from right to left. It is necessary to keep it.

As mentioned above, if the knitting structure shown in Fig. 4 is reversed from the conventional one, even if a Z-twist spun single yarn is used as the pile yarn, the front side shown in Fig. 5 showing the wrapping order of the pile yarn reed will be Since the wrapping direction is counterclockwise in the side and knitting needle portions, the rotation imparted by this wrapping action causes the Z-twisted single yarn to become S-twisted, that is, twisted in the untwisting direction. Since the propagation force of the twist in the yarn is small, even if the fluffs of adjacent yarns touch each other, the force of each yarn to wrap the fluffs is small, and therefore the wrapping effect causes points a and c
Even if the tension of the threads is loosened at a point, the extent to which the two threads are pulled together will be very small, and no thread breakage will occur.

In addition, in the knitting needle portions on the back side, the rotation imparted by the wrapping action in the clockwise direction around these knitting needle portions causes the Z twist in the direction of twisting of the Z twist spun single yarn, which is a pile yarn. Twisting occurs, and as a result, the propagation force of the twist in the yarn and the degree of entanglement and entanglement of the fluff increase, but overlapping occurs where the yarn tension becomes strong, and moreover, the moving distance of ~d becomes ~a, ~c Since the speed of the thread is approximately twice that of , and it moves in the same time as a and c between them, the speed of the thread is doubled. Since the yarn reaches the needle, the degree of entanglement of adjacent yarns due to fluff at point d is extremely small, and the swing of the pile reed from one knitting needle to another is linear, and the tension in the yarn is relaxed. Therefore, even at point b, the extent to which adjacent threads pull against each other is extremely small, and therefore knitting can be carried out without fear of thread breakage. Then, the pile yarn is raised in the center between the front and back textures thus knitted to obtain a product such as a blanket.

Also, in the same manner as above, by rearranging the chain links, the wrapping direction with respect to the front side knitting needles is in the counterclockwise direction, which is opposite to the conventional structure where the wrapping direction is clockwise with respect to the front side knitting needles. so that it is in the wrapping direction,
A cut pile fabric having a knitting structure as shown in FIG. 6, in which the pile yarn is sequentially wrapped around each knitting needle over three stitches in each of the front and rear, was knitted using a Z-twisted spun single yarn as the pile yarn.

In this case, the wrapping movement of the reed L3 of the pile yarn is performed in the order shown in Figure 7, but in the same way as above, the front side knitting needle portion rotates against the Z-twisted single yarn by the rotation imparted by the wrapping action. Since twisting occurs in the heat-reducing direction of the S twist, the force that causes the fluff of adjacent yarns to wrap around each other, that is, the degree to which the two yarns pull together, is small and yarn breakage does not occur. Although twisting occurs in the twisting direction of the twisted single yarn, the movement of the reed toward the front side is linear or long and fast, and the tension of the yarn does not loosen, so there is no possibility of entanglement or pulling due to the fluff of adjacent yarns. The degree of friction is small and thread breakage does not occur.

[Effects of the Invention] As described above, the present invention has a knitting structure in which the wrapping direction of the front needle bed with respect to the knitting needles is counterclockwise, that is, for example, with respect to a pile structure in which the wrapping direction of the front needle bed with respect to the knitting needles is clockwise. Because the left and right sides are knitted with opposite structures, the wrapping effect of any of the knitting needles on the front and rear needle beds is excessive, as mentioned above, even though the very common Z-twist spun single yarn is used as the pile yarn. It is possible to knit cut-pile fabric without intertwining of yarns or yarn breakage, which hinders knitting. Moreover, with the existing double lattice machine, only simple changes such as rearranging chains and links are required. It is possible to organize and implement the system. Moreover, the cut pile fabric knitted in this way is comparable to conventional products using spun twin yarns. Therefore, according to the present invention, a cut pile fabric using ordinary Z-twist inexpensive spun single yarn as the pile yarn can be easily produced and provided at low cost by warp knitting.

[Brief explanation of drawings]

Figure 1 is a side view of the main parts of a double lattice machine specializing in cut piles, Figure 2 is a knitting structure diagram showing the wrapping state of each yarn in a conventional cut pile fabric, and Figure 3 is a diagram showing the front and rear knitting needles of the same as above. FIG. 4 is a schematic plan view showing the wrapping order of pile yarns; FIG. 4 is a knitting structure diagram showing the wrapping state of each yarn of the cut pile fabric according to the present invention in an exploded manner corresponding to FIG. 2;
Fig. 5 is a schematic plan view showing the wrapping order of the pile yarns for the knitting needles in the previous figure, Fig. 6 is a knitting organization diagram showing the wrapping state of the threads of the cut pile fabric of another embodiment in an exploded manner, and Fig. 7 is FIG. 3 is a schematic plan view showing the wrapping order of pile yarns for the knitting needles shown in the previous figure. P... Pile thread, L1, L5... Inserted thread reed, L2,
L4...Chain thread reed, L3...Pile thread reed.

Claims (1)

[Scope of Claims] 1. When a pile yarn consisting of a Z-twisted spun single yarn is sequentially wrapped around two or more knitting needles on each of the front and rear needle beds using a double lattice machine and knitted together with the front and rear fabric, the knitting needles on the front needle bed A method for knitting cut pile fabric by warp knitting, characterized by knitting in a knitting structure in which the wrapping direction of the pile yarn is in a counterclockwise direction. 2. The knitting structure according to claim 1, wherein the left and right sides of the knitting structure are opposite to the pile structure in which the wrapping direction with respect to the knitting needles of the front needle bed in which the underwrapping moves by one stitch is in a clockwise direction. A method of knitting cut pile fabric using warp knitting.