CN112292047A

CN112292047A - Socks

Info

Publication number: CN112292047A
Application number: CN201880094502.1A
Authority: CN
Inventors: 水村真奈美; 石井良
Original assignee: Good Product Plan
Current assignee: Good Product Plan
Priority date: 2018-06-08
Filing date: 2018-06-08
Publication date: 2021-01-29
Anticipated expiration: 2038-06-08
Also published as: JPWO2019234905A1; CN112292047B; JP6763099B2; WO2019234905A1; KR20210013172A

Abstract

The invention provides a sock which does not feel local excessive tightening force and has the effect of being not easy to shift and fall off regardless of the thickness of legs. The sock comprises a welt portion, a leg portion, an ankle portion, a heel, a sole portion, a instep portion, and a toe portion, and is formed so that a knitting pattern defined by a lateral extension dimension is constant in the leg portion from below the welt portion to the ankle portion.

Description

Socks

Technical Field

The present invention relates to a sock which does not feel local excessive tightening force and has an effect of preventing slipping-off regardless of individual differences in leg thickness.

Background

The conventional socks often have the problem that the socks are easy to dislocate and fall off. One of the causes of the dislocation and the dropping is that the supporting force of the rubber of the sock mouth portion is insufficient. Generally, it is expected that the slip-off is not easily caused by knitting rubber into the welt portion to enhance the supporting force.

However, such socks have an excessively high tightening force, which not only gives pain to the wearer, but also causes troubles such as a blood circulation disorder due to the fact that the sock opening portion is caught in the skin during wearing. In the case of a sock having a sock opening portion which is not tightly tightened for the sake of comfortable wearing feeling, the sock not having a sock opening portion into which rubber is not knitted does not sink into the skin, but the sock has a weak support force corresponding thereto, and the slip-off is not eliminated.

In addition, in consideration of the fact that the circumferential length of the leg is increased from the ankle to the calf as a cause of the dislocation and falling, patent document 1 discloses a trumpet-shaped sock in which the stitch density (japanese: stitch) of the leg portion and the welt portion is continuously or stepwise increased from the lower end of the leg portion to the upper end of the welt portion to substantially match the shape of the leg portion, and patent document 2 discloses a sock having a more foot-fitting shape which is knitted so that the stitch of the leg portion of the sock is gradually or stepwise decreased from the welt to the heel.

In these conventional techniques, the effect of preventing dislocation and falling off is expected by knitting the legs in stages in accordance with the shape of the human leg, but the dislocation and falling off cannot be prevented in some cases due to individual differences in the shape of the leg. Further, since the knitting shape of the leg portion is complicated, it takes time and labor to program knitting conditions and set and adjust the knitting machine at the time of production, and there is a problem that it is not suitable for mass production.

Documents of the prior art

Patent document

Patent document 1: japanese patent No. 4035964

Patent document 2: utility new case registration No. 3211919

Disclosure of Invention

Problems to be solved by the invention

In view of the above problems, the present invention aims to provide a sock that does not feel local excessive tightening force and is not likely to slip off regardless of the thickness of the foot.

Means for solving the problems

The present invention solves the above-described problems, and provides a sock including a welt portion, a leg portion, an ankle portion, a heel portion, a sole portion, a instep portion, and a toe portion, wherein the sock is formed so that a knitting pattern defined by an extension dimension in a transverse direction is constant in the leg portion from below the welt portion to the ankle portion.

ADVANTAGEOUS EFFECTS OF INVENTION

The socks of the present invention can eliminate blood circulation disturbance and local excessive tightening force during wearing and prevent dislocation and falling off regardless of individual differences in leg thickness.

In addition, since the sock of the present invention can keep the knitting pattern constant in the leg portion from the lower side of the welt portion to the ankle portion, the time required for programming knitting conditions and setting knitting conditions by the knitting machine in production can be significantly reduced, and the time required for adjusting the variation of each knitting machine can be reduced.

In addition, in the sock of the present invention, the tightening force of the leg portion from the lower side of the welt portion to the ankle portion is adjusted, so that the back yarn rubber can be prevented from slipping off without being inserted into the inner side of the leg portion, and therefore, the manufacturing cost can be further reduced.

Drawings

Fig. 1 (a) shows an example of the embodiment of the sock of the present invention, and fig. 1 (b) shows the positions of "a-portion elongation dimension" and "a to d-portions of the knitting pattern" which are control factors for measuring the sock of the present invention.

Fig. 2 is a factor-effect diagram (SN ratio) showing variation in leg thickness.

Fig. 3 is a graph showing the effect (sensitivity) of factors on the amount of dislocation and detachment.

Detailed Description

The sock of the present invention is proposed by parameter design based on quality engineering (Taguo method). Hereinafter, a process of designing the sock of the present invention will be described based on examples.

Examples

(1. measuring characteristic value)

In order to design the socks which are not easy to dislocate and fall off, the degree of dislocation and fall off of the socks can be measured when the socks are actually worn, but the socks are not dislocated and fall off when the socks are worn. Here, a sport using a dynamometer (evaluation test measurement) was taken, and the dislocation drop amount [ mm ] after the sport using the dynamometer was performed for a certain time after wearing was measured.

(2. external factor)

The socks are not dislocated and fall off immediately after wearing. It is considered that the dislocation gradually comes off with the lapse of time after wearing. Further, since the elongation of the sock is different depending on the thickness of the leg, the thicker the leg, the more easily the cloth of the sock is stretched, and the sock cannot completely follow the movement of the skin due to the exercise and can be dislocated and detached. Here, the movement time [ minute ] is used as the signal factor M, and the leg thickness [ cm ] of the welt portion is used as the error factor N. Specifically, as the signal factor M, the movement time of the dynamometer is set to 2 levels (M1: 2[ min ], M2: 4[ min ]).

On the other hand, as the error factor N, the legs of 3 subjects having legs of different thicknesses were set to 6 levels (N1: 31.4[ cm ], N2: 33.5[ cm ], N3: 34.8[ cm ], N4: 35.0[ cm ]), N5: 38.4[ cm ], N6: 39.1[ cm ]. The thickness of the leg was based on the minimum and maximum circumference of the lower leg in the AIST body size database (520 men and women) published by the institute of Industrial science and technology of independent administration (refer to the database of the human body sizes of riverine true age and Hold pill Ming, 2005AIST body size database, institute of Industrial technology H16PRO 287).

(3. control factor and Quadrature Table)

Fig. 1 shows an embodiment of a sock 1 according to the present invention. The sock 1 is a sock knitted by a double-cylinder hosiery machine (japanese: ダブルシリンダー) and includes a welt portion 11, a leg portion 12, an ankle portion 13, a heel portion 14, an instep portion 15, a sole portion 16, and a toe portion 17, the welt portion 11 is knitted by 1 × 1 rib knitting (japanese: あぜ) in which front needles and back needles are arranged every 1 wale, and has a height of about 5cm, and the leg portion 12 is knitted by 2 × 1 rib knitting in which front needles are arranged every 2 wales and back needles are arranged every 1 wale, and has a height of about 15cm and a width of about 8.5 cm. The knitting method of the sock 1 of the present invention is not limited to this, and other knitting methods may be employed as long as each control factor described later can be realized.

As control factors for designing the sock 1, the surface yarn polyester linear density (a), the material and linear density of the covering yarn used in the back yarn FTY (covering yarn) (back yarn covering yarn density, B), the back yarn rubber linear density (C), the number of insertion of the welt rubber (welt rubber number, D), the extension size of the welt 11 (a portion extension size, E), the knitting pattern (F), the tightening force strength (G), and the back yarn polyurethane linear density (H) were selected. In order to confirm the change in the measurement characteristic value accompanying the level change of these control factors, an L18 orthogonal table (table 1) in which 1 factor of 2 level and 7 factors of 3 level can be set is used.

[ TABLE 1 ]

< control factor A >

The linear density of surface yarn polyester is adopted as a control factor A. The levels of 2(a 1 to a2) as the control factors a were set as follows. In addition, the actual surface yarn is not only established by the control factor a, but may be used in combination with other synthetic fibers and natural fibers.

Level 1(a 1): 0.9tex

Level 2(a 2): 1.3tex

< control factor B >

The density of the back yarn-coated yarn is used as a control factor B. The control factors B are set to 3 levels (B1 to B3) as follows.

Level 1 (B1): nylon 30 denier (denier)

Level 2 (B2): polyester 75 denier

Level 3 (B3): nylon 140 denier

< control factor C >

The linear density of the back thread rubber is adopted as a control factor C. The control factors C were set to 3 levels (C1-C3) as follows.

Level 1 (C1): none (i.e. not using rubber, same as the following)

Level 2 (C2): no. 90 (i.e. the density of 90 pieces can be placed in parallel in each inch, the same applies below)

Level 3 (C3): number 100 (i.e. density of 100 pieces per inch of length can be placed side by side, the same applies below)

< control factor D >

The number of the rubber at the welt of the sock is used as a control factor D. The 3 levels (D1 to D3) as the control factors D are set as follows.

Level 1 (D1): 5 root of Chinese goldthread

Level 2 (D2): 7 root of Chinese goldthread

Level 3 (D3): 9 pieces of

< control factor E >

The "a-portion elongation" is adopted as the control factor E. The levels of 3 (E1 to E3) as the control factors E are set as follows. Fig. 1 (b) shows the position of the part a, and the elongated dimension of the part a is defined as La. The "elongation" herein means a dimension when both ends of the measurement portion were clamped by a jig having a diameter of 10mm and the measurement portion was stretched in the transverse direction with a force of 3.5 kg. The same applies to the "elongation size" among other control factors below.

Level 1 (E1): 23cm

Level 2 (E2): 25cm

Level 3 (E3): 27cm

< control factor F >

The "weave pattern" is used as the control factor F. Here, the "knitting pattern" is determined by a composite factor such as stitch density and stitch size in knitting, and by the application of tension when inserting rubber in the case of back side yarn rubber, and is defined by a combination of the elongation of any portion in the present invention. Specifically, 3 levels (F1 to F3) as the control factors F are set as follows. The knitting pattern is defined by the combination of the elongation dimensions of the respective portions, i.e., the portion b, the portion c, and the portion d at the point below the welt portion 11, and in the middle of the ankle portion 13, and the portion 3 of the ankle portion 13, and the elongation dimensions of the respective portions Lb, Lc, and Ld. Fig. 1 (b) shows the positions of the b-d parts.

Level 1 (F1): stage (L & ltlb & gt-Lc & ltlc & gt-Ld & ltl & gt, 1 & ltl & lt, 2)

Level 2 (F2): irregular (Lb-Lc is more than or equal to 3, Lc-Ld is more than or equal to 1)

Level 3 (F3): fixed (Lb ═ Lc ═ Ld)

That is, the term "step" as used herein means that the leg shape is formed so as to be tapered from the b portion to the d portion at the same diameter reduction rate. The term "irregular" means that the leg shape is tapered at different diameters from the b portion to the c portion and from the c portion to the d portion, and the former diameter is formed to be larger than the latter diameter. "constant" means that the leg portions are formed in a cylindrical shape having the same diameter.

< control factor G >

The "tightening force intensity" is used as the control factor G. The 3 levels (G1 to G3) as the control factors G are set as follows. The elongation of each part is changed in accordance with the level of the control factor F to express the tightening force strength.

Level 1 (G1): strong (Lb is less than or equal to 22, Lc is less than or equal to 20 and is less than or equal to 19 and is less than or equal to 18 and Ld)

Level 2 (G2): middle (Lb is less than or equal to 24, Lc is less than or equal to 20 and less than or equal to 22, Ld is less than or equal to 19)

Level 3 (G3): weak (Lb is less than or equal to 26, Lc is less than or equal to 24 and is less than or equal to 23, and Ld is less than or equal to 22)

< control factor H >

The linear density of the back side yarn polyurethane is used as a control factor H. The control factors H are set to 3 levels (H1 to H3) as follows. In addition, this is the linear density of the core filament of the back face filament FTY.

Level 1 (H1): 20 denier

Level 2 (H2): 30 denier

Level 3 (H3): 40 denier

The results of the above control factors being distributed and summarized are shown in table 2, and the L18 orthogonal table, which is a table showing 18 kinds of experimental conditions (1 to 18) in which the control factors are distributed, is shown in table 3. In the orthogonal L18 table shown in table 3, for example, experiment No. 1 can be as follows.

Experiment number 1: A1B1C1D1E1F1G1H1

[ TABLE 2 ]

[ TABLE 3 ]

That is, the sock of experiment number 1 indicates that all the control factors (a to H) were knitted at level 1. Similarly, the other 17 experimental conditions (experiment numbers 2 to 18) can be expressed as AnBnCnDnEnFnGnHn (n is 1, 2, and 3) by referring to the orthogonal L18 table shown in table 1.

In the 18 kinds of experimental conditions, the movement time of the movement using the dynamometer was changed to 0 minute, 2 minutes, and 4 minutes, and the dislocation drop amount was measured as the measurement characteristic value at each time. The measurement results and the SN ratio and sensitivity of each experiment are shown in table 4.

[ TABLE 4 ]

(evaluation of measurement characteristic value)

Based on the data in table 4, the SN ratio and the sensitivity for each level of each control factor are obtained (table 5), and factor effect diagrams (fig. 2 and 3) are created for each control factor. Fig. 2 shows that the higher the value of the SN ratio, the less the deviation of the measurement result. Fig. 3 shows that the lower the sensitivity value, the smaller the amount of dislocation drop. Each level is examined with reference to fig. 2 and 3.

[ TABLE 5 ]

In control factor a, "level 2(a 2): 1.3tex "has a relatively high SN ratio," level 1 (A1): the sensitivity of 0.9tex "is lower. However, since there is no large difference between the SN ratios of level 1 and level 2, the control factor a is selected to be "level 1(a 1): 0.9tex is not easy to dislocate and fall off, and the effect is better. However, the influence is smaller than the influence of control factors related to the difficulty of dislocation and detachment described later. From this, it is understood that in the present experiment, polyester was used as a material for the surface yarn, but even if only natural fibers were used, the difficulty of dislocation and falling was not greatly affected.

In control factor B "level 2 (B2): polyester 75 denier "has a relatively high SN ratio, but also a relatively high sensitivity. This is considered to be because the thicker the yarn used for the back yarn is, the more the amount of dislocation and drop is increased regardless of the thickness of the legs. On the other hand, "level 1 (B1): nylon 30 denier "and" level 3 (B3): the SN ratio of nylon 140 denier "is the same, but" level 1 (B1): the sensitivity of nylon 30 denier "decreases. From this, it is found that the filaments used for the covering of the back filaments are preferably thin in terms of linear density.

In control factor C "level 1 (C1): "none" has a relatively high SN, but the sensitivity also becomes extremely high. This is considered to be "the amount of displacement and falling off is large regardless of the thickness of the foot" if the back face yarn rubber is not present. On the other hand, "level 2 (C2): no. 90 "," level 3 (C3): "No. 100" has a low SN ratio but a low sensitivity as compared with level 1. From this, it was found that the back thread insertion rubber was excellent.

In the control factor D, there is no large difference in SN ratio at each level, and it is found that it is preferable to increase the number of welt rubbers because the sensitivity is lowered by increasing the number of welt rubbers.

In control factor E "level 2 (E2): 25cm "has the lowest SN ratio and higher sensitivity, and" level 1 (E1): 23cm "has the highest SN ratio and the lowest sensitivity, and therefore, it is preferable that the elongation of the welt is as small as possible.

In the control factor F, there is no great difference in the SN ratio at each level, "level 3 (F3): since the sensitivity is lowest, it is found that the knitting pattern can be made constant without changing the knitting pattern so as to match the leg shape, and the leg portion can be formed in a constant tubular shape.

In control factor G "level 1 (G1): the "strong SN ratio" is high, and the sensitivity is the lowest, so it is known that the tightening force strength is as strong as possible.

In the control factor H, there is no great difference in the SN ratio at each level, "level 1 (H1): the sensitivity of 20 denier "is the lowest, so it is known that it is desirable to make the core material of the FTY for the back side filaments as thin as possible.

The control factors a, B, and H are control factors relating to the "thread thickness" of the front and back threads, but it is known that any one of them is preferably thin. This can be thought of as the filaments fitting more easily over the legs.

As described above, the optimal conditions for producing socks that are robust to differences in leg thickness and are not easily dislocated and detached are A1B1C2D3E1F3G1H 1. However, when the sock is manufactured by the combination, the tightening force is considered to be too strong for a person with a thickness from the ankle to the calf.

(5. selection of optimum conditions)

The control factors mainly related to the tightening force are the "back thread rubber linear density" of the control factor C and the "tightening force intensity" of the control factor G. Here, levels of these control factors C and G were changed, and a plurality of optimum conditions (table 6, experiment numbers 1 to 6) were selected so as not to excessively increase the tightening force. Selection of control factor C "level 2 (C2): in the case of No. 90 ", the control factor G is selected to be" weak "in which SN is relatively high, so that the tightening force at the time of actual wearing does not become excessively strong. When the optimum condition is selected, the SN ratio between the optimum condition and the standard condition and the estimated value of the sensitivity (estimated value in table 7) are obtained, and based on the evaluation result of the measurement characteristic value, the SN ratio is set to be equal to or higher than the standard condition and the sensitivity is sufficiently lower than the standard condition.

[ TABLE 6 ]

Select "level 1(C1) among control factors C: if not, the cost of the back thread rubber portion can be reduced. In this case, by selecting the control factor G as "level 1 (G1)" which is high in SN ratio and lowest in sensitivity: strong "and can form socks which are not easy to shift and drop even if no back silk rubber is provided. The control factor a is not a factor that greatly affects the tightening force, and thus an arbitrary level can be selected.

(6. confirmation experiment)

The results of the experiments for confirming the optimum conditions of the socks which are less likely to be dislocated and detached and have appropriate tightening force are shown in table 7. In addition, as a result of subjective evaluation of the socks combined in these ways, the tightening force was evaluated not to be excessively large. Further, the combination as a standard condition herein is A2B2C1D2E2F1G2H3 (table 6, standard).

[ TABLE 7 ]

As a result of the confirmation experiment, it was found that the sensitivity of the optimum condition was significantly lower than that of the standard condition in any combination, and the displacement and falling off were significantly less likely. In addition, the SN ratio in the confirmation test under the standard condition is relatively high, which means "the amount of dislocation and drop is large regardless of the thickness of the foot".

(7. conclusion)

The following conclusions were drawn based on the above confirmation experiments and the like.

(1) The knitting pattern of the portions b to d is preferably constant, rather than being complicated knitting such as stepwise changing the stitch density and the stitch size, or changing the tension of the back yarn rubber. That is, the respective elongation dimensions of the b, c, and d parts are equal to each other (Lleg, Lb, Lc, Ld), and preferably in the range of 18 to 26cm, and more preferably in the range of 20 to 24 cm.

(2) When a rubber thread (back thread rubber) is inserted inside the leg portion, the tightening force strength is preferably "weak". In the case where the back side thread rubber is not added, the tightening force strength of the b to d portions is preferably set to "strong". Here, if the tightening force strength is "weak" or "strong" in terms of the extension dimension of the leg portion, the following range is preferable.

Weak: lleg is more than or equal to 22cm and less than or equal to 26cm

Strong: lleg is more than or equal to 18cm and less than or equal to 22cm

(3) The FTY used for the back side wire is preferably a thin wire used as a whole regardless of the material. Specifically, the sheath yarn preferably has a denier of 75 or less and the core yarn preferably has a denier of 30 or less.

(4) The sock portion needs an appropriate tightening force, and therefore, the elongation is preferably set to 25cm or less, more preferably 23cm, without increasing the size. Further, the welt rubber is preferably inserted into the upper end of the welt portion, and the number of the welt rubber is preferably as large as possible, and is preferably 7 or more.

Industrial applicability of the invention

According to the present invention, since the knitting pattern can be made constant in the leg portion from the lower side of the welt portion to the ankle portion, the time required for programming knitting conditions and setting knitting conditions of the knitting machine during production can be significantly reduced, the time required for adjusting the deviation of each knitting machine can be shortened, and the present invention has industrial applicability contributing to mass production and the like.

Description of the reference numerals

1. A sock; 11. a sock opening part; 12. a leg portion; 13. an ankle portion; 14. a heel portion; 15. a instep portion; 16. the foot bottom; 17. a toe portion.

Claims

1. A sock comprises a sock opening part, a leg part, an ankle part, a heel part, a sole part, a instep part and a toe part, and is characterized in that,

the sock is formed so that a knitting pattern defined by a lateral extension dimension is constant in a leg portion from a lower side of a welt portion to an ankle portion.

2. A sock according to claim 1,

the extension size of the leg in the transverse direction is in the range of 18-26 cm.

3. A sock according to claim 1 or 2,

the leg has a tightening force strength in the range of 18 to 22cm in the extension dimension of the leg, and the leg does not have a back-side thread rubber.

4. A sock according to claim 1 or 2,

the leg has a tightening force strength in the range of 22-26 cm in the extension dimension of the leg, and the leg has a back thread rubber.