JPWO2019234905A1 - socks - Google Patents

Abstract

Providing socks that do not feel excessive tightening force partially and exhibit the effect of preventing slippage regardless of leg thickness. A sock comprising a wear mouth part (11), a leg part (12), an ankle part (13), a heel part (14), a sole part (16), an instep part (15) and a toe part (17), The sock is formed so that the knitting pattern defined by the lateral stretch is constant in the leg part (12) between the bottom of the mouth part (11) and the ankle part (13).

Description

The present invention relates to a sock which has an effect of preventing slipping off regardless of individual differences in leg thickness without feeling excessive tightening force partially.

Conventional socks have always been subject to slippage. One of the causes of slippage is the lack of rubber support at the mouth. Generally, we expect that it will be less likely to slip off by knitting rubber in the mouth and strengthening the support force.

However, such a sock has an excessive tightening force, which not only causes pain to the wearer, but also causes a problem such that the mouth portion of the sock bites into the skin to cause a blood circulation disorder during wearing. There are socks that do not tighten the mouth so that you can feel comfortable wearing against this problem, but socks that do not have rubber woven in the mouth do not bite into the skin, but their support power is weak. , The gap has not been resolved.

Another possible cause of slippage is that the circumference of the leg increases from the ankle to the calf. Therefore, in Patent Document 1, the leg portion and the mouth opening are directed from the lower end of the leg portion toward the upper end of the foot opening. It is disclosed that the stitches are continuously or stepwise increased to form a trumpet shape that substantially matches the shape of the leg legs, and Patent Document 2 discloses that the stitches of the leg portion of the sock are worn. A sock is disclosed which is knitted so as to gradually or gradually decrease from the mouth toward the heel, and which fits better to the shape of the foot.

In these prior arts, by knitting in stages according to the shape of the human leg, it is expected that the legs will fit better and the effect of preventing slippage will be prevented, but slippage cannot be prevented due to individual differences in the shape of the legs. There were cases. In addition, since the knitting shape of the leg portion is complicated, it takes time and effort to program the knitting conditions during production and to set and adjust the knitting machine, which is not suitable for mass production.

Patent No. 4035964 Utility model registration No. 3211919

Therefore, in view of the above problems, an object of the present invention is to provide a sock that does not feel excessive tightening force locally and exhibits an effect of preventing slipping off regardless of the thickness of the leg.

The present invention is to solve the above-mentioned problems, and is a sock including a mouth opening portion, a leg portion, an ankle portion, a heel portion, a sole portion, an instep portion, and a toe portion, and is defined by a lateral extension. The sock is formed so that the knitting pattern is uniform in the leg portion between the lower part of the wearing part and the ankle part.

INDUSTRIAL APPLICABILITY The sock according to the present invention can prevent slippage while eliminating blood circulation disorders and partial excessive tightening force during wearing, regardless of individual differences such as leg thickness.

Further, since the sock according to the present invention can make the knitting pattern constant from the lower part of the sock to the leg part of the ankle part, the knitting condition programming at the time of production and the knitting condition setting of the knitting machine can be performed. The time can be greatly shortened, and the time required for adjusting the variation of each knitting machine can be shortened.

Further, the sock according to the present invention can prevent the slippage by adjusting the tightening force at the leg part of the ankle part from below the mouth opening part without inserting the back thread rubber inside the leg part. Therefore, the manufacturing cost can be further reduced.

(A) Example of embodiment of socks according to the present invention, (b) Positions of a to d portions for measuring "a-part stretch dimension" and "knitting pattern" which are control factors for socks according to the present invention Factorial effect diagram for fluctuation of leg thickness (SN ratio) Figure of factor effect on deviation amount (sensitivity)

The sock of the present invention was devised by parameter design by quality engineering (Taguchi method). Hereinafter, the design procedure of the sock of the present invention will be described based on Examples.

(1. Measurement characteristic value)
In order to design a sock that does not easily slip off, it is sufficient to measure how much slippage occurs when the sock is actually worn, but slipping does not occur just by wearing it. Therefore, the exercise (evaluation trial) using an ergometer was introduced, and the amount of deviation [mm] after the exercise was performed for a certain period of time after wearing the ergometer was measured.

(2. Outer factor)
Socks do not slip off immediately after wearing. It is conceivable that it will gradually fall off as time passes after wearing. Further, since the sock's elongation rate varies depending on the thickness of the leg, it is conceivable that the thicker the leg, the more likely the sock's material is to be stretched, and that the sock does not follow the movement of the skin due to exercise and falls off. Therefore, the exercise time [minutes] was adopted as the signal factor M, and the leg thickness [cm] at the mouth part was adopted as the error factor N. Specifically, as the signal factor M, the exercise time of the ergometer was set at two levels (M1:2 [min], M2:4 [min]).

On the other hand, as the error factor N, both legs of three subjects having different leg thicknesses have 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 leg thickness is based on the minimum and maximum circumferences of the lower leg of the "AIST human size database" (520 men and women) published by the National Institute of Advanced Industrial Science and Technology (reference: Makiko Kawauchi. Mochimaru Masaaki, 2005 AIST Human Body Size Database, National Institute of Advanced Industrial Science and Technology H16PRO 287).

(3. Control factor and orthogonal table)
An exemplary embodiment of the sock 1 of the present invention is shown in FIG. This sock 1 is a sock that is knitted using a double cylinder, and is composed of a mouth part 11, a leg part 12, an ankle part 13, a heel part 14, an instep part 15, a sole part 16 and a toe part 17, The mouth part 11 is knitted with a 1×1 woven knitting having front and back stitches arranged for each wale and has a height of about 5 cm, and the leg portion 12 has one wale for the front stitches for every two wales of the front stitch. It is knitted in a ×1 ply knit, and is about 15 cm high and 8.5 cm wide. The knitting method of the sock 1 of the present invention is not limited to this, and any other knitting method may be used as long as it can realize each control factor described later.

As the control factors for designing the sock 1, the polyester thread count (A) for the front thread, the material and count of the cover thread used for the back thread FTY (covering thread) (back thread covering thread count, B), and the back thread rubber count ( C), the number of inserted rubber bands (the number of rubber bands, D), the size of the mouth opening 11 (the size of the part a, E), the knitting pattern (F), the tightening strength (G), the back thread polyurethane count ( H) was selected. In order to confirm the change in the measurement characteristic value with the change in the level of these control factors, an L18 orthogonal table (Table 1) in which one 2-level factor and seven 3-level factors can be set was adopted.

<Control factor A>
As the control factor A, "front yarn polyester count" was adopted. Further, the two levels (A1 to A2) of the control factor A were set as follows. It should be noted that the actual surface yarn does not consist only of the control factor A, and can be used in combination with other synthetic fibers or natural fibers.
Level 1 (A1): 0.9 tex
Level 2 (A2): 1.3 tex

<Control factor B>
"Back yarn covering yarn count" was adopted as the control factor B. The three levels (B1 to B3) of the control factor B were set as follows.
Level 1 (B1): Nylon 30 denier Level 2 (B2): Polyester 75 denier Level 3 (B3): Nylon 140 denier

<Control factor C>
"Back thread rubber count" was adopted as the control factor C. Further, the three levels (C1 to C3) of the control factor C were set as follows.
Level 1 (C1): None Level 2 (C2): No. 90 Level 3 (C3): No. 100

<Control factor D>
As the control factor D, the "number of rubber bands" was adopted. The three levels (D1 to D3) of the control factor D were set as follows.
Level 1 (D1): 5 pieces Level 2 (D2): 7 pieces Level 3 (D3): 9 pieces

<Control factor E>
As the control factor E, "a part elongation" was adopted. The three levels (E1 to E3) of the control factor E were set as follows. The position of the part a is shown in FIG. 1B, and the extension of the part a is defined as La. The term "extension dimension" as used herein means that the both ends of the measurement portion are sandwiched by a sandwiching tool having a diameter of 10 mm, and the dimension is measured when pulled laterally by a force of 3.5 kg. The same applies to the "extension dimension" in the other control factors below.
Level 1 (E1): 23 cm
Level 2 (E2): 25 cm
Level 3 (E3): 27 cm

<Control factor F>
"Knitting pattern" was adopted as the control factor F. Here, the "knitting pattern" is determined by a composite element such as the size of stitches and stitches in knitting, the degree of tension when inserting the rubber when the back thread rubber is present, and the like in the present invention. , Shall be defined by the combination of the stretch dimensions of any part. Specifically, the three levels (F1 to F3) of the control factor F were set as follows. The bottom of the mouth opening 11, the bottom of the mouth opening 11, the midpoint of the ankle portion 13, and the ankle portion 13 are defined as b portion, c portion, and d portion, respectively, and the extension dimensions of each portion are Lb, Lc, and Ld, respectively. As, the knitting pattern is defined by the combination of the stretched dimensions of each part. FIG. 1B shows the positions of the parts b to d.
Level 1 (F1): Stage (L=Lb-Lc=Lc-Ld, 1≦L≦2)
Level 2 (F2): Anomaly (Lb-Lc≧3, Lc-Ld≧1)
Level 3 (F3): constant (Lb=Lc=Ld)
That is, the term “step” here means that the leg portion shape is gradually thinned from the b portion to the d portion at the same diameter reduction rate. In addition, the "irregularity" means that the parts b to c and the parts c to d become thinner with different diameter reduction ratios, and the former diameter reduction ratio is larger than the latter diameter reduction ratio. It means that it is formed. Furthermore, "constant" means that the leg portions are formed in a tubular shape having the same diameter.

<Control factor G>
"Tightening strength" was adopted as the control factor G. The three levels (G1 to G3) of the control factor G were set as follows. The tightening force strength is expressed by changing the extension of each part according to the level of the control factor F.
Level 1 (G1): Strong (Lb≦22, 19≦Lc≦20, 18≦Ld)
Level 2 (G2): Medium (Lb≦24, 20≦Lc≦22, 19≦Ld)
Level 3 (G3): Weak (Lb≦26, 23≦Lc≦24, 22≦Ld)

<Control factor H>
As the control factor H, "counting of back yarn polyurethane" was adopted. Further, the three levels (H1 to H3) of the control factor H were set as follows. This is the count of the core yarn of the back yarn FTY.
Level 1 (H1): 20 denier Level 2 (H2): 30 denier Level 3 (H3): 40 denier

Table 2 shows the control factors assigned and summarized, and Table 3 shows the L18 orthogonal table showing the 18 kinds of experimental conditions (1 to 18) to which these control factors are assigned. In the L18 orthogonal table shown in Table 3, for example, Experiment No. 1 can be shown as follows.
Experiment number 1: A1B1C1D1E1F1G1H1

That is, the sock of Experiment No. 1 shows that the control factors (A to H) are all socks knitted as level 1. Note that the other 17 experimental conditions (Experiment Nos. 2 to 18) can be similarly expressed as AnBnCnDnEnFnGnHn (n=1, 2, 3) with reference to the L18 orthogonal table shown in Table 1.

Under such 18 kinds of experimental conditions, the exercise time of the exercise using the ergometer was changed to 0 minutes, 2 minutes, and 4 minutes, and the deviation amount as the measurement characteristic value at each time was measured. Table 4 shows these measurement results and the SN ratio and sensitivity of each experiment.

(4. Evaluation of measurement characteristic values)
Based on the data in Table 4, the SN ratio and sensitivity for each level of each control factor were obtained (Table 5), and a factor effect diagram was created for each control factor (Figs. 2 and 3). The SN ratio in FIG. 2 indicates that the higher the value, the less variation in the measurement result. Further, the sensitivity of FIG. 3 indicates that the lower the value, the smaller the deviation amount. Each level will be considered with reference to FIGS. 2 and 3.

For the control factor A, the SN ratio is high at “level 2 (A2):1.3 tex” and the sensitivity is low at “level 1 (A1):0.9 tex”. However, since there is no great difference in the SN ratio between Level 1 and Level 2, it is more effective to select “Level 1 (A1): 0.9tex” with low sensitivity as the control factor A so that the shift is less likely to occur. However, when compared with the degree of influence of a control factor relating to the difficulty of slipping off, which will be described later, it can be seen that the influence is small. From this, it can be seen that although polyester was used as the material for the surface yarn in this experiment, even if only natural fiber is used, it does not have a great influence on the difficulty of slipping.

In the control factor B, the SN ratio of "Level 2 (B2): Polyester 75 denier" is high, but the sensitivity is also high. It can be considered that the thicker the thread used for the back thread, the greater the amount of slippage regardless of the thickness of the leg. On the other hand, "Level 1 (B1): Nylon 30 denier" and "Level 3 (B3): Nylon 140 denier" have similar SN ratios, but "Level 1 (B1): Nylon 30 denier" has low sensitivity. .. Therefore, it was found that the yarn used for covering the back yarn should have a thin count.

The control factor C has a high SN ratio of "level 1 (C1): none", but the sensitivity is also extremely high. This can be considered to be “there is a large amount of slippage regardless of the thickness of the legs” without the rubber thread on the back. On the other hand, “Level 2 (C2): No. 90” and “Level 3 (C3): No. 100” have lower SN ratios than Level 1, but the sensitivity is low. From this, it was found that it was better to insert the back thread rubber.

It was found that the control factor D does not have a large difference in the SN ratio at each level, and the sensitivity decreases as the number of rubber bands increases, so that it is better to increase the number of rubber bands.

In control factor E, "Level 2 (E2): 25 cm" has the lowest SN ratio and high sensitivity, and "Level 1 (E1): 23 cm" has the highest SN ratio and the lowest sensitivity, so wear it as much as possible. It turns out that the smaller the stretch of the mouth is, the better.

In the control factor F, there is no big difference in the SN ratio at each level, and the sensitivity of "Level 3 (F3): constant" is the lowest, so the knitting pattern can be adjusted without changing the knitting pattern by force. It was found that the effect can be exerted by forming the leg part in a constant tubular shape with constant.

With the control factor G, the SN ratio of "level 1 (G1): strong" is high and the sensitivity is the lowest. Therefore, it was found that the tightening force strength should be as strong as possible.

With the control factor H, there is no big difference in the SN ratio at each level, and the sensitivity of "level 1 (H1): 20 denier" is the lowest, so it is preferable that the FTY core material used for the back yarn is as thin as possible. Do you get it.

The control factors A, B, and H are control factors related to the "thread thickness" of the front yarn and the back yarn, but it has been found that the thinner one is the best. It is thought that this is because thin threads tend to follow the legs more easily.

From the above, A1B1C2D3E1F3G1H1 was the optimal condition for making socks that are highly robust against differences in leg thickness and that are resistant to slippage. However, when socks are made with this combination, it is considered that the tightening force is too strong for a person with a thick ankle to calf circumference.

(5. Selection of optimum conditions)
The control factors mainly related to the tightening force are the "back thread rubber count" of the control factor C and the "tightening force strength" of the control factor G. Therefore, the levels of these control factors C and G were changed, and a plurality of optimum conditions were selected so that the tightening force would not become too strong (Table 6, Experiment Nos. 1 to 6). When the control factor C “level 2 (C2): No. 90” is selected, the control factor G selects “weak” with a high SN ratio, so that the tightening force during actual wearing may not be too strong. Disappear. In selecting the optimum condition, the SN ratio of the optimum condition and the standard condition and the estimated value of the sensitivity are obtained (Table 7, estimated value), and the SN ratio is the standard condition based on the evaluation result of the measurement characteristic value described above. The sensitivity was set to be about the same or higher and the sensitivity was sufficiently lower than the standard condition.

If “level 1 (C1): none” is selected for the control factor C, the cost of the back thread rubber can be reduced. In that case, by selecting "level 1 (G1): strong", which has the highest SN ratio and the lowest sensitivity, the control factor G can be made into a sock that does not easily slip off without the back thread rubber. Further, since the control factor A is not a factor that greatly affects the tightening force, either level may be selected.

(6. Confirmation experiment)
Table 7 shows the results of a confirmation experiment conducted on the optimum conditions of socks in which slippage is unlikely to occur and tightening force is appropriate. As a result of subjective evaluation, the socks of these combinations are evaluated not to have too tight a tightening force. The combination used as the standard condition here is A2B2C1D2E2F1G2H3 (Table 6, standard).

As a result of confirmation experiments, it was found that in any combination, the sensitivity of the optimum condition was significantly lower than that of the standard condition, and it was apparently difficult to drop the deviation. It should be noted that the standard condition has a higher SN ratio in the confirmation experiment, but this means that "the deviation amount is large regardless of the leg thickness".

(7. Conclusion)
The following conclusions were made based on the above confirmation experiments.
(1) It is preferable that the knitting patterns of the b to d portions be constant rather than complicated knitting such as gradually changing the stitch size, stitch size, or tension of the back thread rubber. That is, the elongations in the b portion, the c portion, and the d portion are equal to each other (Lleg=Lb=Lc=Ld), preferably in the range of 18 to 26 cm, 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, it is preferable that the tightening force is "weak". When the back thread rubber is not inserted, it is desirable to set the tightening force strength of parts b to d to "strong". Here, when the tightening force strength “weak” and “strong” are expressed by the extension dimension of the leg portion, the following range is preferable.
Weak: 22 cm ≤ Lleg ≤ 26 cm
Strength: 18 cm ≤ Lleg ≤ 22 cm
(3) It is preferable that the FTY used for the back yarn is a thin yarn as a whole, regardless of the material. Specifically, the covering yarn is preferably 75 denier or less, and the core yarn is preferably 30 denier or less.
(4) Since a proper tightening force is required at the mouth part, it is preferable not to increase the elongation dimension so that it is 25 cm or less, more preferably 23 cm. Further, it is preferable to insert a rubber band at the upper end of the shoe opening so as to increase the number as much as possible, preferably 7 or more.

According to the present invention, since the knitting pattern can be made constant from the lower part of the wearing part to the leg part of the ankle part, the time required for programming the knitting conditions during production and setting the knitting conditions of the knitting machine can be greatly reduced. In addition to being able to reduce the time required for adjusting the variation of each knitting machine, it has industrial applicability such as contributing to mass production.

1 Socks 11 Socks 12 Legs 13 Legs 14 Ankles 14 Heels 15 …Insteps 16 …Sole 17 …Toes

Claims (4)

A sock consisting of an opening, legs, ankles, heels, soles, insteps, and toes, and a knitting pattern defined by the lateral stretch extends from the bottom of the opening to the ankle. A sock that is formed so that it is constant in the legs between. The sock according to claim 1, wherein the lateral extension of the leg portion is in the range of 18 to 26 cm. The tightening force strength in the leg portion is in the range of 18 to 22 cm in terms of extension of the leg portion, and the leg portion does not have a back thread rubber. socks. The sock according to claim 1 or 2, wherein the tightening strength of the leg portion is in the range of 22 to 26 cm in terms of extension of the leg portion, and the leg portion has a back thread rubber.

Images