HK1073870B - Manufacturing method of fleecy inner surface tubular knitted gabric and apparatus - Google Patents

Description

Method and apparatus for producing circular knitted fabric with raised inner surface

Technical Field

The present invention relates to a method and an apparatus for producing a circular knitted fabric with raised inner surface.

Background

The knitted fabric used as the underwear is preferably a pile fabric in order to keep warm. The raising of a knitted fabric is generally carried out after knitting by post-processing. In such a case, the circular knitted fabric is usually cut and hung on a raising machine, and therefore, it is necessary to sew a hem after raising.

On the other hand, a raising machine has also appeared in which a circular knitted fabric can be raised as it is. The raising machine is extremely expensive because it needs 4000-5000 ten thousand yen, so it is not practical.

Therefore, a study has been made on knitting machines to raise the pile simultaneously with knitting. This technology in the japanese country is formed by a series of technologies applied in the personal name of eagle tailboom of weo limited who is the applicant of the present invention (for example, patent document 1, patent document 2, patent document 3, patent document 4, patent document 5, utility model document 1, utility model document 2, utility model document 3, utility model document 4).

(patent document 1)

Japanese patent publication No. 59-14585

(patent document 2)

Japanese patent publication No. 61-22058

(patent document 3)

Japanese patent publication No. 63-39701

(patent document 4)

Japanese examined patent publication (JP-B) No. 3-23663

(patent document 5)

Japanese examined patent publication (Kokoku) No. 3-51812

(Utility model document 1)

Showa 58-42476B

(Utility model document 2)

Showa 59-17912A

(Utility model document 3)

Showa No. 62-6155

(Utility model document 4)

Showa 62-23829

These patents and utility models are directed to B-type and K-type knitting machines for knitting plain knitted fabrics. That is, since the upper part of the cylinder of the knitting machine is opened, a wide connector is attached to the upper surface of the cylinder, and a pile brush is attached to the upper part of the knitted fabric.

However, a circular knitting machine capable of double-side knitting, which is provided with a dial for knitting plain knitting, tuck knitting, loop knitting, rib knitting, and double-side knitted fabric to knit a low rib welt, cannot mount a raising brush on the upper part of the knitted fabric because there is no open space on the upper part of the cylinder of the knitting machine. Therefore, in the case of using a circular knitting machine, it is difficult to simultaneously pile the inner surface on the knitting machine.

In the case of using a double-sided circular knitting machine, as a prior art, a simultaneous raising on the knitting machine is exemplified by the knitting machine described in patent document 6, but in this invention, since a raising mechanism is provided on the outer side at a needle bed gap which is an intersection of a dial and a cylinder, raising is performed on an intermediate layer of a cross section of a knitted fabric, and not only raising on an inward surface is not possible, but also selection of a raising position of a product is not easy. Further, in patent document 7, which relates to the invention of the applicant of the present invention, since the raising means is provided on the outer surface of the cylinder, the inner surface is not raised.

(patent document 6)

Japanese patent laid-open publication No. 52-18969

(patent document 7)

Japanese laid-open patent publication No. 2002-20948

In addition, in the circular knitting machine, since the pile brush is made of a rigid metal, it is impossible to pile a knitted fabric made of synthetic fiber filaments.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a method and an apparatus for knitting a knitted fabric on a circular knitting machine including a device incorporating a transfer jack and a cylinder, and raising only the upper and lower surfaces of a necessary knitted fabric portion.

In order to achieve the above object, the present invention provides a method for producing a circular knitted fabric knitted by a circular knitting machine including a transfer dial device and a cylinder, wherein the knitted fabric knitted by the knitting machine is positioned between a knitted fabric guide provided in the cylinder and a raising brush which is movable forward and backward with respect to the cylinder when the transfer dial device is opened, and an appropriate portion of an inner surface of the knitted fabric is raised while the knitted fabric is knitted.

Further, the circular knitting machine is provided with a transfer dial device and a cylinder, and is provided with a transfer dial support mechanism that opens by raising the dial, a raising brush support mechanism that moves the raising brush forward and backward in the cylinder, and a knitting fabric guide that supports the knitting fabric knitted by the knitting machine between the cylinder and the raising brush, and the knitting fabric is knitted and a suitable portion of the inner surface of the knitting fabric is raised.

According to the present invention, when a circular knitted fabric is knitted by a circular knitting machine, raising can be performed while knitting the inner surface thereof. The knitted fabric portion is knitted with a pile structure by a face yarn and a back yarn, and the top of the pile can be raised in the course direction while knitting.

The invention can finish the raising on the knitting machine instead of the conventional raising, so the unit price of the product is low.

The invention can randomly select the raising part of the product and can adapt to the market requirement in time.

Since the circular knitted fabric of the present invention uses the very fine long fibers in the knitting yarn, loop-like pile can be formed without protruding the end faces of the fibers, and therefore, the pile surface has no unevenness, and a soft touch can be maintained, and thus, the circular knitted fabric can be made into a high-grade product. In addition, the unique raised surface also provides the desired effect if turned over to make a product with the raised surface for use as the outer surface.

The circular knitted fabric of the present invention has a soft touch to the skin when used as a towel material due to the use of the aforementioned unique pile and ultra-fine yarn and stretchability.

Drawings

Fig. 1 is a front view including a partially cut-away section of a circular knitting machine showing an embodiment of a circular knitting fabric manufacturing apparatus of the present invention.

Fig. 2(a) is a schematic cross-sectional view and (b) is a plan view of a transfer dial device of a circular knitting machine showing an embodiment of the apparatus for producing a circular knitted fabric of the present invention.

Fig. 3 is a schematic view showing a knitting procedure in tucking a selvage.

Fig. 4 is a schematic diagram showing a transition state.

Fig. 5 is a schematic view showing a state where the dial portion is lifted and the raising brush is inserted into the opening.

Fig. 6 is an enlarged view showing a state where the pile brush is inserted.

Fig. 7(a) is a front view showing a mechanism for supporting the pile brush, and (b) is a side view thereof.

Fig. 8 is a schematic view showing an example of the circular knitted fabric of the present invention.

Fig. 9 is a weave diagram showing tuck knitting which is another embodiment of the circular knitted fabric of the present invention.

Fig. 10 is a weave diagram showing a tuck stitch as another embodiment of the present invention.

Detailed Description

Embodiments of the present invention will be described in detail based on the drawings. Fig. 1 is a front view of a circular knitting machine including a partially cut cross section showing an embodiment of a device for producing a circular knitted fabric of the present invention, and fig. 2 is a schematic cross section showing a state of knitting around a cylinder and a transfer dial of the circular knitting machine and a state of guiding the knitted fabric by a guide cylinder showing an embodiment of the device for producing a circular knitted fabric of the present invention. Fig. 3 is a schematic view showing a state in which the dial portion is lifted and the raising brush is inserted into the opening. FIG. 4 is a view showing a state in which the pile brush is pressed against the circular knitted fabric and the cross section of the upper portion of the cylinder portion. Fig. 5 is a diagram showing details of a mechanism for supporting the pile brush.

In fig. 1, a circular knitting machine having a cylinder and a dial is shown as a circular knitting machine 1. Further, the circular knitting machine can be used for a cylinder knitting machine of a single needle bed such as a small circular knitting machine, and a disc cylinder knitting machine composed of a rib circular knitting machine or a double-sided circular knitting machine. Here, the needle cylinder refers to a cylindrical needle bed, and the dial refers to a transfer dial device provided with a transfer jack. Therefore, although only plain circular knitted fabrics can be knitted by the single-bed knitting machine, rib knitting, double-sided knitting, that is, double-rib knitted fabrics can be knitted by the knitting machine 1 of the present invention.

As shown in fig. 1, the circular knitting machine 1 knits the knitting yarn Y supplied from the knitting yarn supply device 2 into a circular knitted fabric by a plurality of knitting needles N and sinkers S provided on a needle cylinder 3. When a circular knitted fabric is knitted into a panty hose, the circular knitted fabric is knitted in the order from a waist portion to a panty portion, leg portions and a toe portion, and the knitting is finished at an opening end portion of a toe tip portion, and the circular knitted fabric is recovered by a material blow-out looper for each leg.

The needle cylinder 3 of the circular knitting machine 1 has knitting needles N and a butt piece J arranged in a groove arranged vertically around the circumference. The bottom leg piece J is moved up and down by the cam 4, so that the knitting needles N arranged in opposition to each other are moved up and down along the groove and slid between an operating position and a non-operating position.

A sinker head 5 is disposed around the cylinder 3 at the upper part of the cylinder 3, and a sinker S is provided on the sinker head 5 so as to be slidable in the radial direction of the cylinder. The sinker S is operated by the cam gear 6.

Above the needle cylinder 3, a transfer dial device 7 is disposed which rotates in synchronization with the needle cylinder 3. The transfer dial device 7 is in the position shown in fig. 1 during normal operation, and is rotated to the inclined position shown in fig. 5 during operation of a raising device described later.

As shown in fig. 1 and 5, the knitted fabric guide 10 is composed of a cylindrical portion 11 arranged concentrically with the needle cylinder 3 and an annular portion 12 extending outward from an upper end of the cylindrical portion 11. The knitted fabric guide 10 supports the pantyhose P knitted by the needle cylinder 3 by the annular portion 12 and guides the pantyhose P to the cylindrical portion 11.

The circular knitting machine 1 is provided at an upper portion thereof with a raising brush 14 attached to a cylinder 15, a cylinder support mechanism 16 for supporting the cylinder 15, and a lever 17 for tilting a dial opening.

Fig. 2 shows a transfer dial device 7 provided at the upper portion of the needle cylinder for the double knitting portion of the inlet port for knitting the pantyhose P. The transfer dial device 7 has radial grooves 1/2 corresponding to the number of knitting needles in the needle cylinder, and two transfer leg pieces 71 are arranged in a set. The leg piece 71 is pushed radially outward by the cam 72 inside and is disposed between the knitting needles N of the cylinder.

The footing piece 71 is composed of a thin steel plate made into the shape shown in fig. 2(a), and the front end is provided with a gap through which the knitting needle N can go in and out and a hook 73 holding the yarn supply.

As shown in fig. 3, to knit the double knitting portion of the inlet of the panty hose P, the knitting needles N are at every other action position. First, every other loop is knitted in the yarn supply of the 1 st course. Then, all knitting needles of the yarn feeding of the 2 nd course are activated to knit. In the yarn feeding of the 3 rd course, the knitting needles are again arranged in every other needle, and every other needle becomes the active position. And the state is continued until the end of the knitting of the welt without the action of the hook of the upper base piece 71 on the needle to enter and exit the retaining loop as it is and then to retreat into the dial device. Further, all knitting needles from the yarn supply of the 4 th course become knitting positions, and knitting of the welt is continued. These are called ruffled selvedges.

As shown in fig. 4, (1) when the toe portion is knitted to a desired length, (2-3) the base piece 71 advances over the knitting needle N in the inactive position in a state where the 3 rd course of yarn-fed loops are held on the hooks. (4) The knitting needle ascends by knitting to enter the front end gap portion of the back leg piece 71, (5) the hook retreats to move the loop held by the back leg piece 71 to the knitting needle, and the loop remains on the needle from the front end thereof. Thus, tubular knitting was performed.

The knitted fabric P is pulled to the inner surface of the cylinder 3 immediately after knitting. Further, since the transfer dial 7 is attached to the upper portion of the knitted fabric, there is no open space in a normal state. Therefore, although the brush cannot be attached to the upper portion of the cylinder 3 in general, the brush can be inserted into the inner surface of the cylinder 3 by adopting a configuration described later in the present invention. A knitted fabric guide 12 which gradually bends as it advances inward is provided adjacent to the inside of the needle cylinder 3. The knitted fabric guide 12 not only guides the knitted fabric P slowly downward, but also sandwiches the knitted fabric P between a pile brush 14 described later, and the pile brush 14 also supports the knitted fabric P against a force pressing the knitted fabric P.

The state shown in fig. 5 shows a state in which the transfer dial device 7 is lifted obliquely upward by the dial lifting mechanism 17. The dial raising mechanism 17 is pivotally supported at one end by a rotary shaft provided on a frame of the apparatus main body, and is configured to be raised by being driven by an air cylinder or the like. A raising brush 14 is attached to the tip of the cylinder 15, and extends and contracts in the arrow direction to sandwich the knitted fabric P between the knitting fabric guide 12 and press the knitted fabric P to raise the knitted fabric. During which knitting of the knitted fabric is continued with the needle cylinder 3.

Fig. 6 shows a state in which the air cylinder 15 is extended to nip the knitted fabric P between the knitted fabric guide 12 and raise the transfer dial 7. During this time, knitting by the transfer dial device 7 cannot be performed, but knitting by the needle cylinder 3 continues. The raising effect is better when the raising brush 14 is located obliquely above the needle cylinder 3 relatively near during this time. Further, the case where the air cylinder 15 enters toward the center of the transfer dial device 7 and the case where it enters from an eccentric position are possible.

Fig. 7 shows the support state of the cylinder 15. The cylinder support mechanism 16 is formed with elongated holes in both the base portion and the cylinder support portion, and is configured to support the cylinder 15 in a vertically and longitudinally adjustable manner by screws 25 and 26 slidably engaged in the elongated holes.

The cylinder 15 can be positioned more accurately by forming the base provided with the guide groove and the table-like member sliding in correspondence thereto, in addition to the long hole. Furthermore, by adding a support mechanism that can be rotated as needed, not only the contact position of the raising brush 14 with respect to the knitted fabric can be adjusted, but also the contact angle can be adjusted. Instead of using a cylinder, the raising brush 14 may be attached to a shaft forming a rack and moved in and out by a pinion gear provided with a drive mechanism.

Since the pile brush 14 is in contact with the surface of the knitted fabric P in a loaded manner, it is necessary to obtain a non-patchy pile by taking into consideration the non-entanglement of the knitted fabric. The pile brush 14 of the present embodiment may use, for example, reinforced nylon, metal, a wire brush, sandpaper, or the like. In particular, it is preferable to use a brush having a diameter for contacting the soft knitted fabric 120.4 to 0.5 nylon fibers, and the tips are uniformly aligned as corners.

Further, although the yarn feeding ports for plain knitting as the yarn feeding ports for knitting yarns and the yarn feeding ports for pile knitting are arranged so as to face each other, a combination of the two ports may be adopted.

The knitting method of the panti-hose will be explained. The knitting is started from the inlet, but as described above, the inlet is knitted by the face yarn and the back yarn to form a tubular knitting. Therefore, knitting is performed by both the needle cylinder 3 and the transfer dial device 7. This state is a state in which the transfer dial device 7 is closed, as shown in fig. 1. The pile brush 14 is in the retracted position. If knitting of this part is finished, normal knitting only by the needle cylinder 3 is continuously performed. In this case, in a state where the transfer dial device 7 is lifted by the dial lifting mechanism 17 so that the dial 7 is opened obliquely upward, the raising brush 14 is advanced by the air cylinder 15, and as shown in fig. 5 and 6, the raising brush 14 enters the needle cylinder 3, and, for example, the pants portion or the leg and toe portions are raised. Since the pile brush 14 can be freely selected to enter and exit if the transfer dial device 7 is opened, the pile portion can be freely selected. Further, since the opening and closing of the transfer dial 7 can be freely selected, the selection of the knitting portion of the needle cylinder 3 and the knitting portion of the needle cylinder 3 can be freely selected by using the transfer dial 7 in combination.

Although the present invention can raise the fabric during knitting, the fabric can be raised by moving the fabric relative to the knitted fabric during knitting even if the raising brush 14 as the raising means is not provided with a driving means for raising the fabric. However, in order to raise the pile more efficiently, raising can be performed more efficiently if a mechanism for rotating the raising brush 14 is added. After the raising operation is completed, the raising brush 14 is retracted, the transfer dial 7 is closed, and the knitted fabric completed in knitting is discharged from the material blow-out port 20 through the suction pipe 19.

Fig. 8 is a structure diagram showing a plating knitted fabric composition in which a back yarn B is added to a face yarn a in an example of a circular knitted fabric knitted with pile using the apparatus of the present invention. As described above, the circular knitted fabric of the present invention is manufactured by bringing the raising brush 14 into contact with the inner surface of the knitted fabric P on the knitting machine 1 to raise the inner surface of the knitted fabric P simultaneously with the knitting.

The knitting yarn Y becomes the toe of the links on the both back side of the inner surface, and the pile brush comes into contact with the pile 30, so that the circular knitted fabric 12 of the present invention becomes the single-sided pile 30. At this time, various yarns to be described later are selected and used for the knitting yarns Y in the wales so as to facilitate the raising 30.

The following is a description of the knitting yarn using the aforementioned apparatus and method. As shown in fig. 8, when the back yarn B is raised, particularly since the influence of the raising is large, the selection thereof becomes more important.

In order to carry out such napping, it is essential in the present invention to use long fibers, i.e., filaments. Examples of the knitting yarns used to obtain this pile are as follows. For example, as the nylon yarn for raising, a false twist yarn of an extremely fine filament such as a false twist 50D/225F is used. As a result, the surface fiber is soft as in the case of using short fibers. A knitted fabric having a good touch which cannot be achieved by using a fiber shorter than the above fiber can be produced. As an example, 25 long fiber bundles were split into 9 parts using 50 denier yarns consisting of 225 filaments. Further, rayon yarn, polyester filament, or the like may be used.

On the other hand, the face yarn is exemplified by a single-layer covered yarn in which a spandex elastic fiber yarn is used as a core yarn and a natural fiber or a wool-like nylon yarn is covered.

The covering yarn is composed of 10D-30D core yarn and 50D/24F wool-like nylon yarn wound on the periphery of the core yarn.

Alternatively, the spandex elastic fiber yarn may be heat-treated in consideration of the 2 nd transition point temperature in a state where the yarn is wound into a loop by a false twister or a stuffer box, and the yarn may be determined in consideration of the texture required for the knitted fabric.

As shown in fig. 9 and 10, in the case of the circular knitted fabric of the present invention, even if the circular knitted fabric is a tuck-stitch knitter, the inner surface of the knitted fabric P knitted on the knitting machine 1 can be knitted while raising the inner surface of the knitted fabric P by bringing the raising brush 14 into contact with the inner surface.

Although it is necessary to avoid this as much as possible if the end faces of the fibers of the raised portion protrude during raising, the skin feel is poor, but it is necessary to form the raised portion in a loop shape so as not to protrude the end faces of the fibers. When the loop-like pile is formed, the touch feeling of the skin is remarkably improved. Furthermore, no spots in the pile can be made.

Claims (3)

1. A method for producing a circular knitted fabric by a circular knitting machine having a transfer dial device and a cylinder, characterized in that the knitted fabric knitted by the knitting machine is positioned between a knitted fabric guide provided in the cylinder and a raising brush which is movable forward and backward with respect to the cylinder when the transfer dial device is opened, and an appropriate portion of the inner surface of the knitted fabric is raised while knitting the knitted fabric.

2. A circular knitting machine having a transfer dial device and a cylinder, characterized by comprising a transfer dial support mechanism for lifting the dial and opening it, a raising brush support mechanism for advancing and retreating the raising brush in the cylinder, and a knitting fabric guide for supporting the knitting fabric knitted by the knitting machine between the cylinder and the raising brush.

3. The apparatus for producing a circular knitted fabric according to claim 2, wherein the raising brush support mechanism is capable of adjusting a contact position and a contact angle of the raising brush with respect to the knitted fabric.