JPH1143805A - Panty hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain panty hose capable of providing preventing effects on edema or fatigue. SOLUTION: This panty hose is obtained by making parts knitted with two or more different stitch lengths in the same course continuously present and sandwiched between parts knitted with the same stitch length in the same course in the longitudinal direction of a leg part in at least a part of the leg part of the panty hose using a covered elastic yarn. The parts knitted with the same stitch length in the same course are 1-40 courses.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to pantyhose, and more particularly to pantyhose (hereinafter referred to as pantyhose) for preventing edema and fatigue of a leg provided with a pressure difference in a well direction of the leg, that is, a circumferential direction of the leg. .

[0002]

2. Description of the Related Art In recent years, a fit type pantyhose using a covering elastic yarn in which a yarn constituting a leg is a polyurethane elastic yarn as a core yarn and an inelastic yarn such as polyamide is wound around the core yarn has been used in recent years because of its good fit. Has become mainstream. In this fit-type pantyhose, an attempt has been made to improve the fit of each leg by applying a tightening force in accordance with each leg. In addition, products are being developed that aim to prevent leg edema and fatigue by increasing the tightening force.

[0003] Pantyhose having such increased tightening force is used in various fields such as Europe in the field of foot care such as prevention and treatment of varicose veins. The tightening force of the pantyhose on each leg is determined by the elongation of the pantyhose knitted fabric at the pantyhose part corresponding to the leg part. Here, the stretch rate of the pantyhose knitted fabric is determined by the type of yarn constituting the pantyhose, the yarn factor such as denier, and the knitting structure factor.
In the case of using the same yarn and the same knitting structure, it is determined by the stitch length of the pantyhose knitted fabric.

Conventionally, the tightening force according to each part of a pantyhose leg is such that, when the pantyhose knitted fabric has the same yarn and the same knitting structure in the leg part, the pantyhose circular knitting machine is used in accordance with each part of the leg. The knitting is performed by so-called fashioning in which knitting is performed so that the stitch length indicating the drawing-in depth of the knitting needle is changed and the stitch length of the pantyhose knitted fabric is changed. For example, in a general pantyhose, in a leg length direction (course direction) such as a thigh, a calf, and an ankle, the tightening force is the weakest at the thigh, and the tightening force is lower in the order of the thigh, the calf, and the ankle. The stitch length is changed so that it becomes stronger.

[0005] Further, pantyhose in which leg portions are subdivided to have more or less tightening force than the thigh, calf, and ankle portions have also been commercialized. In these parts, the division of each part is limited to a section in the leg length direction (course direction), and the stitches in the leg circumferential direction (well direction) in each part have the same stitch length. The clamping force was the same.

However, the leg circumferential direction (well direction)
If the stitches of the same stitch length are the same and the legs are tightened with the same tightening force, a high tightening force may interfere with blood flow on the skin surface, and on the contrary, it is more likely to cause fatigue and edema there were. In order to obtain a sufficient tightening force without obstructing blood flow on the skin surface, it is necessary to generate a pressure difference in the circumferential direction of the leg (well direction). This is because a pressure difference is created to allow the blood flow on the skin surface to escape at the low pressure portion, and tightened at the high pressure portion to provide sufficient tightening force without obstructing the blood flow on the skin surface. Because it can be done. For this purpose, for example, there is a method of stitching knitted fabrics with different elongation rates.However, in products where the thickness of the fabric is thin, such as pantyhose, and the appearance is transparent and emphasis is placed on the appearance, the strength and appearance of the sewn part should be considered. There's a problem.

[0007] Further, in order to generate a contact pressure difference in the leg circumferential direction (well direction), Japanese Patent Application Laid-Open No. 9-78307 discloses
As described in JP-A-9-78308, loops having different elongation rates in the same course, that is, loops having different stitch lengths may be present. Because of the small pressure difference, it does not obstruct the blood flow on the skin surface, assists the muscle pumping action of the legs, and does not provide pantyhose that prevents edema, fatigue, and thus leg disorders such as varicose veins. .

The leg muscle pumping function is an auxiliary function for returning the venous blood of the leg to the heart, and assists by compressing the blood vessels by utilizing muscle contraction. In order to return venous blood from the leg to the heart, blood pressure alone is not sufficient because it goes against gravity. For this reason, if a long standing operation or the like is performed, edema may occur on the legs, particularly the lower legs, that is, the legs below the calf. The muscle pump action is the above action for preventing this.

[0009]

SUMMARY OF THE INVENTION The present invention assists muscle pumping of the legs without inhibiting blood flow on the skin surface, and prevents edema and fatigue, and thus leg disorders such as varicose veins. The purpose is to provide such pantyhose.

[0010]

Means for Solving the Problems The inventors of the present invention have made intensive studies to overcome the above-mentioned drawbacks of the prior art, and as a result, in order to assist the action of the leg muscle pump without inhibiting the blood flow on the skin surface, A pressure difference is provided in the leg circumferential direction (well direction),
It is effective to release the blood flow on the skin surface at the low pressure part, and to assist the leg muscle pumping action at the high pressure part. The part knitted with the same stitch length and the part with two or more different stitch lengths Investigating the positional relationship with the skin, effective compression pressure and compression pressure difference, found that an effect capable of assisting the muscle pumping action of the leg without obstructing blood flow on the skin surface was obtained, and reached the present invention. did.

That is, the present invention relates to a pantyhose using a covering elastic yarn in which a polyurethane elastic yarn is used as a core yarn and a non-elastic yarn is wound around the core yarn, wherein at least a part of the leg has the same course. In the same course sandwiched between 1 to 40 courses knitted with the same stitch length, at least two or more portions knitted with two or more different stitch lengths continuously exist in the leg length direction. A pantyhose, preferably, a portion 1-40 courses in which the same course is knitted with the same stitch length adjacent to a portion knitted with two or more different stitch lengths in the same course. Amax is the maximum stitch length in
When the minimum stitch length is Amin, Amax / Amin is 1.05
A pantyhose characterized by the above, and preferably, a part of 1 to 40 courses in which the same course is knitted with the same stitch length and two or more different stitches in the same course sandwiched therebetween. When the maximum contact pressure in the part knitted by length is Pmax and the minimum contact pressure is Pmin, Pma
x is 20 mmHg or more, and the difference between Pmax and Pmin is 10 mmHg or more.

Hereinafter, the present invention will be described. The leg in the present invention is in a state where the pantyhose is actually worn,
It refers to any part of the foot, the so-called thigh (leg), calf (calf), ankle (ankle), or toe (toe). The stitch length in the present invention means a length necessary to form one stitch, and in FIG. 1 which is a model loop diagram of one embodiment of the pantyhose knitted fabric according to the present invention, a needle Expressed as the sum of the loop and the sinker loop.

In the pantyhose of the present invention, a portion knitted in two or more different stitch lengths in the same course is required in order to provide a pressure difference. Since the tightening force of the pantyhose on each leg is determined by the stretch rate of the pantyhose knitted fabric, if the pantyhose knitted fabric uses the same yarn and has the same knitting structure, it is determined by the stitch length of the pantyhose knitted fabric and within the same course. By knitting with two or more different stitch lengths, it is possible to obtain pantyhose having different tightening forces in the circumferential direction of the leg, that is, different wearing pressures.

In the pantyhose of the present invention, in addition to the above structure, at least two or more portions knitted with two or more different stitch lengths in the same course sandwiched between portions knitted with the same stitch length in the same course A continuous structure is required. There are at least two parts where the same course is knitted with the same stitch length, two parts of the same course are knitted with two or more different stitch lengths, and at least two parts where the same course is knitted with the same stitch length. Structure.

[0015] This is because the pressure difference caused by the knitting of two or more different stitch lengths in the same course is sandwiched between the portions knitted with the same stitch length in the same course, and the difference in the pressure is reduced. This structure is necessary to enlarge and release blood flow on the skin surface, while assisting the muscle pumping action of the legs. If loops with different stitch lengths exist in the same course, a difference in the compression pressure will occur due to the difference in the elongation rate of the loops.However, in actual wear, a loop with a short stitch length is difficult to stretch, so the stitch length is longer than necessary. The loop is stretched, and as a result, the pressure applied to the portion having a large stitch length increases, the pressure applied to the portion having a short stitch length decreases, and the pressure applied to the entire leg portion in the circumferential direction tends to be uniform. Is less likely to occur.

If the short stitch length portion is positively stretched and worn by devising a way of wearing, a contact pressure difference based on the original stitch length is generated, but the contraction force of the short stitch length portion is reduced. Because it is high, gaps occur due to exercise such as walking,
As a result, the loop having a long stitch length is elongated, and the same phenomenon as described above occurs, so that a difference in the applied pressure hardly occurs. However, if a portion knitted with two or more stitch lengths is sandwiched by a portion knitted with the same stitch length, a portion knitted with two or more stitch lengths is constrained by a portion knitted with the same stitch length. For this reason, unnecessarily stretching of the loop having a long stitch length is suppressed, and the stretching rate of each portion approaches the original stretching rate of the loop, so that the pressure difference increases.

In this case, the portion knitted in the same course with two or more different stitch lengths is continuous for one or more courses, preferably 20 to 600 courses, more preferably 50 to 300 courses. Means the part that exists. If the portion of the same course knitted with two or more different stitch lengths exceeds 600 courses, the portion knitted with the same stitch length in the same course cannot sufficiently serve as a constraint point, and therefore, the pressure difference Becomes insufficient,
The effect of assisting the muscle pumping action of the legs cannot be obtained without inhibiting the blood flow on the skin surface.

Further, the pantyhose of the present invention is characterized in that the same course described above sandwiches a portion knitted with two or more different stitch lengths. It is characterized by being. When the part of the same course existing as a constraint point and knitted with the same stitch length exceeds 40 courses, the circumference of the leg is uniformly tightened in the same manner as normal pantyhose, obstructing blood flow on the skin surface, and the desired effect Can not be obtained.

Further, in a portion where the same course is knitted with two or more different stitch lengths, the ratio of different stitch lengths in the same course, that is, the ratio of the shortest stitch length to the longest stitch length is 1.05 or more. It is desirable that Generally, the tightening force of the pantyhose on each leg is determined by the stitch length if the thread is the same, the knitting structure factor is removed, and the type of yarn that composes the pantyhose, the yarn factor such as denier, and the knitting structure factor are removed. Is done. Therefore, the tightening force of the conventional pantyhose in which all stitches in the same course have the same stitch length is the same in the leg circumferential direction, and the tightening force decreases as the stitch length increases.

On the other hand, in the case of the pantyhose of the present invention,
The tightening force of the pantyhose on the leg should be 2 in the same course.
It differs for each stitch portion having more than one kind of different stitch length, and the fastening force is determined by the stitch length and the number of stitches of each stitch portion. For example, in a portion where the same course is knitted with two or more different stitch lengths, the pressure applied to a stitch portion having a long stitch length is lower than that applied to a stitch portion having a short stitch length. The greater the difference in stitch length, the greater the difference in the contact pressure. The difference between the two stitch lengths, when the stitch length of the shorter stitch length is 1,
If it is larger than 1, a pressure difference will occur.

However, in order to capture the difference in the wearing pressure as a measured value, it is necessary that the stitch length ratio is 1: 1.05 or more, and that the human body feels the difference in the wearing pressure when worn, and that the difference in the effects such as being less tired is felt. , A stitch length ratio difference of 1: 1.1 or more is preferable. If the stitch length ratio is less than this, a difference in the contact pressure occurs, but the difference is slightly reduced. Furthermore, the arrangement of the pressure difference caused by the difference in stitch length in the stitch portion having two or more different stitch lengths in the same course on the human leg is not particularly limited, but does not inhibit blood flow on the skin surface, It is desirable to arrange the muscle pump to work effectively.

That is, in the case of a leg, generally, the front surface of the leg is at low compression pressure (portion knitted with a long stitch length), and the portion where the muscle at the rear surface of the leg is present has high compression pressure (short stitch length). (A knitted part). For example, in a calf part, a low pressure portion (a portion knitted with a long stitch length) is disposed on the front surface, and a high pressure portion (a portion knitted with a short stitch length) is disposed on the rear surface. The shin allows the blood flow on the skin surface to escape, while the calf at the back can assist the muscle pump.

Loops other than the loop having the shortest stitch length in the same course in a portion where the same course is knitted with two or more different stitch lengths are arranged in a diamond shape or a triangle in a continuous course direction in this portion. Is preferred. The rhombus here refers to a rhombus in which one of two lines connecting the vertices of a rectangle is parallel to the well direction.
The triangle is a triangle whose one side is parallel to the well direction.

When loops other than the loop having the shortest stitch length in the same course are arranged in a rhombus or a triangle, a portion in the same course adjacent to the apex or base in the course direction is knitted with the same stitch length. The binding force at
This is because a contact pressure difference is likely to occur. In the pantyhose of the present invention, the maximum stitch length in a portion of 1 to 40 courses in which the same course is knitted with the same stitch length in the same course adjacent to a portion knitted with two or more different stitch lengths in the same course is Amax,
When the minimum stitch length is Amin, Amax / Amin is 1.05
It is preferably at least, and more preferably at least 1.1. This is to provide a large pressure difference.

With respect to the arrangement of loops having stitch lengths of Amax and Amin, a portion knitted with two or more different stitch lengths and a portion knitted with the same stitch length adjacent to a course having a long loop length and a large number of loops Is preferably Amax, and a portion knitted with two or more different stitch lengths and having the same stitch length adjacent to a course having a long stitch length and a small number of loops is preferably Amin.

In a course having a large number of loops with a long stitch length, a low compression pressure is applied due to a large elongation ratio.
It is preferable that the stretch rate is smaller and the compression pressure is higher in a course with a small number of loops having a long stitch length than in a course with many loops having a long stitch length. Preferably, the long part is Amin.

Further, the pantyhose of the present invention comprises a portion of 1 to 40 courses knitted in the same course with the same stitch length and a portion knitted in the same course with two or more different stitch lengths. The maximum pressure is Pmax and the minimum pressure is Pm
When in, Pmax is 20mmHg or more, and Pmax and Pmin
Is preferably 10 mmHg or more. here,
The measurement of the contact pressures Pmax and Pmin is performed by the following method.

Extend the pantyhose legs to 80 cm and
Mark every cm. If the length of the leg of the pantyhose in the unstretched state is 80 cm or more, the length of the leg is set to 8
Divide equally and mark each position. 10cm in diameter,
Set the pantyhose in a 5 mm thick acrylic cylinder in an extended state so that the distance between marks is 10 cm, check the stitch length with the naked eye, and knit the same course in two or more different stitch lengths, And in the part of the 1-40 course where the same course adjacent to it was knitted with the same stitch length,
The maximum pressure Pmax and the minimum pressure Pmin are measured using an air-pack type pressure gauge (a clothing pressure measuring device manufactured by AIMI, model 3037).

The extension to 80 cm corresponds to the extension value when wearing a pantyhose of the crotch from the toe of the standard human body and the M-size mannequin. The circumference of 10 cm in diameter corresponds to the circumference of the calf of a standard human body. First, the fact that the maximum contact pressure Pmax obtained by the measurement is 20 mmHg or more means that the leg muscle pump is supported with sufficient tightening force for prevention or treatment of leg edema and fatigue, varicose veins, and the like. is necessary. At a compression pressure of less than 20 mmHg, the tightening force is insufficient, and the auxiliary effect of the muscle pump on the leg is reduced, and it is difficult to obtain effects such as prevention and treatment of edema, fatigue, and varicose veins.

It is necessary that the difference between the applied pressure, that is, the difference between the maximum applied pressure Pmax and the minimum applied pressure Pmin obtained by the measurement is 10 mmHg or more, in order to release the blood flow on the skin surface. When the pressure difference is less than 10 mmHg, the blood flow on the skin surface is hindered due to the high pressure on the skin as in the conventional product in which the whole is uniformly tightened, or the muscle pump is low due to the low pressure on the whole. The effect of edema, fatigue, and prevention and treatment of varicose veins is hardly obtained.

The maximum contact pressure Pmax is not particularly limited to 20 mmHg or more. For example, the minimum stitch length in a course having two or more different stitch lengths in the same course may be reduced, or the polyurethane elastic fiber may be used. You may use a thing with strong power, a thick denier, for example, 40 denier or more. In addition, the portion that causes a difference in the compression pressure in the leg circumferential direction is not particularly limited, but it is not necessary to dispose it on the entire leg as long as the above conditions are satisfied. Necessary portions, such as a calf and an arch, etc. It may be partially implemented.

In the place where the maximum contact pressure Pmax is developed in the pantyhose, a loop portion having a short stitch length in a portion knitted with two or more different stitch lengths in the same course or a loop portion having the same stitch length in the same course. A loop portion having a short stitch length is preferable, and it is more preferable that only a loop portion having a short stitch length within a portion knitted with two or more different stitch lengths in the same course develops the maximum pressure Pmax. As for the minimum contact pressure Pmin, a loop portion having a long stitch length in a portion where the same course is knitted with two or more different stitch lengths is preferable.

Although the fashioning for controlling the overall pressure distribution of the pantyhose in the present invention is not particularly limited, the thigh portion has a long stitch length and a low knitting pressure, and the calf portion, that is, from the ankle to below the knee. It is preferable to shorten the stitch length and increase the knitting pressure. If the thigh is tightened more than necessary, there is a high possibility that the blood flow of the entire leg is obstructed.

The pantyhose of the present invention is currently manufactured using a circular knitting machine provided with a device capable of changing the stitch length in the same course by moving the knitting cam up and down. In a general circular knitting machine, a plurality of vertical grooves are engraved in a cylinder that rotates around its axis, and one needle is set in each of the grooves. Moves along the groove. Each of the needles has at least one protruding portion (bat) radially with respect to the cylinder, and the bat runs up and down formed by a plurality of cams provided beside the needle. Traveling along the road raises and lowers the needle. When the needle is raised at the point where the yarn is supplied, the supplied yarn is caught by the needle, and when the needle is lowered, the caught yarn passes through the previously formed stitch of the previous course to form a new stitch. It is formed.

The cam at the position where the yarn is supplied is located above the supply position of the yarn, and a cam that raises the needle to a height at which the needle can catch the yarn supplied by the yarn guiding device; It is a pair of cams, which are located at the lower part of the position and a needle lowering cam for lowering the needle after catching the thread and passing through the previously formed stitch of the previous course to form a new stitch.

In general, knitting is performed in a circular knitting machine for pantyhose, in which knitting is performed by changing the stitching depth of the knitting needle in the course direction, that is, fashioning, in which a cylinder, that is, the entire needle is moved to the pair of cams. It is performed by changing the drawing-in depth of the knitting needle by moving it in the axial direction. On the other hand, the pantyhose of the present invention is obtained from a circular knitting machine in which the above-mentioned needle down cam is arbitrarily moved in the same course, and the needle down cam is moved at least once in the same course to thereby lower the needle down. A stitch portion having a stitch length corresponding to the distance (generally 1.00 mm or less) that the needle lowering cam has moved while the needle passes over the cam at the original position of the cam and at the position moved once or more is formed. It is obtained by doing. Therefore, by controlling the time that the needle passes through the cam at the position where the needle lowering cam has moved, the needle lowering cam moves between any wells of 1 well or more and less than the number of knitting machine needles. A stitch portion having a stitch length according to the distance can be set. In addition, since it is possible to arbitrarily move the needle down cam and return it to the original position in the same course, two or more stitch portions having different stitch lengths may be used alone in the same course. , Can be alternately repeated or arbitrarily provided.

Further, since the needle lowering cam operates independently of the cylinder, even if fashioning is performed,
For the stitch length of the stitch corresponding to the frequency of each course,
It is possible to set the moving distance of the needle down cam, and it is possible to provide stitch portions having arbitrary different stitch lengths in the same course. From the above, it is possible to create an arbitrary stitch area having a different stitch length in the course and the well direction by knitting a stitch portion having a different stitch length of an arbitrary well number that is not less than 1 well and less than the number of needles of a knitting machine. Can be.

The stitch length is determined according to the moving distance of the needle down cam. When the needle down cam moves to the lower position with respect to the needle head, the stitch length is determined according to the distance before the needle down cam moves. A stitch portion having a longer stitch length than the stitch in the same course knitted at the original position of the stitch is obtained. The knitting machine
It is not particularly limited as long as it is a circular knitting machine provided with a device for changing the stitch length in the same course, but in the case of pantyhose, the number of needles is 300 to 600, and the diameter of the shuttle (diameter of the shuttle) is 3 inches to 5 inches are preferred.

The knitting structure used for the leg in the present invention is a knit,
The organization is formed by a combination of tack and welt, and is not particularly limited. The thread use and knitting structure of the stitch portion in the same course or the course and the well in any of the stitch ranges in both the well directions are not particularly limited, but the wearing pressure difference can be provided even with the same yarn use and the same knitting structure. Because of one of the advantages of the present invention, it is preferable to use the same yarn and the same knitting structure.

Regarding the structure, type and denier of the yarn used for the leg in the present invention, the yarn structure is determined by the fitting pressure difference in the circumferential direction of the leg, that is, the tightening, because of the fitting force. Because the difference in force becomes even clearer, it is particularly limited except that it is a fit type that uses a covering elastic yarn as a knitting yarn, with polyurethane elastic yarn as the core yarn and inelastic yarn wrapped around it. Not something. The covering elastic yarn is a single covering elastic yarn in which a polyurethane elastic yarn is covered as a core yarn and an inelastic yarn is covered around the core yarn, and a double covering elastic yarn in which an inelastic yarn is covered twice around the single covering elastic yarn. Either thread may be used.

The fit type includes a covering elastic yarn,
The mainstream is a cross-knit pantyhose made by alternately knitting filament yarns such as polyamide, which are both yarns, and a Zocki pantyhose made of 100% covering elastic yarn. In any case, the elastic fiber is 3 denier to 240 denier.
In order to obtain a sufficient pressure for obtaining the effect, polyurethane fibers of 40 to 140 denier are preferably used, and polyamide fibers or polyester of 3 to 70 denier, preferably 5 to 50 denier are used for the covering yarn. Fibers, filament yarns such as natural or regenerated cellulose fibers, crimped yarns such as wooly processed yarns, mixed fiber yarns, and spun yarns are used. In the case of mixed knitting pantyhose, the material of the yarn and the denier are not particularly limited.
Denier to 150 denier, preferably 5 to 100 denier, polyamide fibers, polyester fibers, filament yarns such as natural or regenerated cellulose fibers, crimped yarns such as wooly processed yarns, mixed fiber yarns, and spun yarns are used.

As described above, according to the present invention, in addition to the proper pressure in the length direction of the leg, the difference in the pressure in the circumferential direction of the leg is provided, and the position of placement on the human leg is optimized, whereby the blood on the skin surface is adjusted. The muscle pump can be assisted without obstructing the flow to provide pantyhose effective for reducing fatigue, reducing edema, and preventing varicose veins.

[0043]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to examples and comparative examples. In addition, the evaluation of the obtained product was performed by the following method. (Measurement of compression pressure) Extend the leg of the pantyhose to 80 cm,
Mark by cm. If the length of the leg of the pantyhose in the unstretched state is 80 cm or more, the length of the leg is set to 8
Divide equally and mark each position.

A pantyhose was set on an acrylic cylinder having a diameter of 10 cm and a thickness of 5 mm in an extended state so that the distance between marks was 10 cm. If the stitch length is different due to the difference in stitch length, the stitch length is checked with the naked eye, and the same course is knitted with two or more different stitch lengths in the same course and in the same course adjacent to it. Organized 1
In the part of the 40 courses, the maximum pressure Pmax and the minimum pressure Pmin are measured by using an air pack type pressure gauge (a clothing pressure measuring device manufactured by AIMI, model 3037). (Sensory evaluation) Fit, wear comfort, and fatigue after exercise when the wearer actually wears and stands still and exercises (repeating the platform for 5 minutes three times with a 1-minute break). Was subjected to a sensory test.

The number of panelists is 10 and 5 for each item.
Grading was performed. Regarding fit and wearing comfort, "very good" is 5, "good" is 4, "neither" is 3, "somewhat poor" is 2, "bad" is 1, and fatigue is 5 "Not tired", 4 "Not hard to be tired", 3 "Neither"
2 "I make you feel tired"
Was set to 1, and the average of 10 persons was set as the evaluation value.

In addition, upon wearing, the part where low pressure is applied due to the difference in stitch length is placed on the front of the leg, and the part where high pressure is applied is placed on the back of the leg. The direction at the time of wearing was not stipulated for those having no difference in the contact pressure.

[0047]

Examples 1 to 6 While denaturing a 40-denier polyurethane elastic yarn by 3.2 times, using an 8-denier and 4-filament nylon 66 yarn as a covering yarn, the number of ply twists was 2100 T / M using a normal covering machine. , Number of twists 1700T
/ M gave a double covered yarn. Using this double covered yarn, 400 needles, hook diameter 4 inch
With a circular knitting machine for pantyhose, in which the needle down cam moves arbitrarily, the leg portions were knitted with a sheeting structure to produce pantyhose.
In addition, the degree was set to the fashioning of the pantyhose of the standard size. 40 needles in all parts in the leg length direction
As shown in Tables 1 and 2, the needle down cams were knitted 0.6 mm lower than the other positions of the course, and knitted to obtain the pantyhose of Examples 1 to 6. After that, dye in the usual way,
Finished and set the template to make the product.

Table 5 shows the obtained product performance results.

[0049]

Examples 7 to 9 While elongating a 70-denier polyurethane elastic yarn 3.9 times, using a 14-denier, 5-filament nylon 66 yarn as a covering yarn, the number of twists was 2,000 T / M with a normal covering machine. , Number of twists 1700
Double covered yarn was obtained by T / M. A pantyhose was prepared and evaluated in the same manner as in Example 1 except that the double covered yarn was used. Table 3 shows the method of the needle down cam.
Table 5 shows the obtained product performance results.

[0050]

Comparative Example 1 A pantyhose was prepared and evaluated in the same manner as in Example 1 except that the needle lowering cam was knitted at the normal position in all the foot portions. Table 4 shows the method of the needle down cam, and Table 5 shows the obtained product performance results.

[0051]

[Comparative Example 2] The needle down cam lowering range in which knitting is performed by lowering the needle down cam by 0.6 mm is performed for 200 wells out of 400 needles over the entire course in the length direction of the leg, and the remaining 200 wells are used. A pantyhose was prepared and evaluated in the same manner as in Example 1 except that knitting was performed at a normal time. Table 4 shows the method of the needle down cam, and Table 5 shows the obtained product performance results.

[0052]

Comparative Example 3 15 denier polyurethane elastic yarn was used.
A single covered yarn was obtained with a twisting number of 1600 T / M using a normal covering machine using 10 denier and 4 filament nylon 66 yarn as the covering yarn while elongating 8 times. A pantyhose was prepared and evaluated in the same manner as in Example 1 except that this single covered yarn was used. Table 4 shows the method of the needle down cam, and Table 5 shows the obtained product performance results.

As is apparent from the results of the measurement of the wearing pressure and the evaluation of wearing, the present invention has a high-compressing portion of the calf portion which can assist the muscle pump, and provides a difference in the wearing pressure in the circumferential direction of the leg portion. Wearing with the front side on the low pressure side and the rear side on the high pressure side makes it easy to exercise and does not hinder the blood flow in the legs, so that it was possible to reduce fatigue when ending exercise.

[0054]

[Table 1]

[0055]

[Table 2]

[0056]

[Table 3]

[0057]

[Table 4]

[0058]

[Table 5]

[0059]

According to the pantyhose of the present invention, the pressure difference is provided not only in the length direction of the leg but also in the circumferential direction of the leg, and the blood flow on the skin surface is inhibited by optimizing the arrangement position on the human leg. Without a muscle pump, it is extremely effective in reducing fatigue, edema and preventing varicose veins.

[Brief description of the drawings]

FIG. 1 is a model loop diagram of one embodiment of a pantyhose knitted fabric according to the present invention. The stitch length referred to in the present invention is indicated by oblique lines.

[Explanation of symbols]

 1: Leg length direction (course direction) 2: Leg circumferential direction (well direction)

Claims (3)

[Claims] 1. A pantyhose using a covering elastic yarn in which a polyurethane elastic yarn is used as a core yarn and a non-elastic yarn is wound therearound, wherein at least a part of a leg has the same stitch length in the same course. In the same course sandwiched between the knitted 1 to 40 course portions, at least two or more portions knitted with two or more different stitch lengths continuously exist in the length direction of the leg. Characterized pantyhose. 2. A maximum stitch length in a 1-40 course where the same course is knitted with the same stitch length adjacent to a portion knitted with two or more different stitch lengths in the same course is Amax, and a minimum stitch is The pantyhose according to claim 1, wherein Amax / Amin is 1.05 or more when the length is Amin. 3. The maximum contact pressure in a portion of 1 to 40 courses knitted with the same stitch length in the same course and in a portion knitted with two or more different stitch lengths in the same course sandwiched between them. When Pmax and the minimum contact pressure are Pmin, Pmax is 2
2. The pantyhose according to claim 1, wherein the difference between Pmax and Pmin is 10 mmHg or more at 0 mmHg or more.