WO2019234905A1

WO2019234905A1 - Sock

Info

Publication number: WO2019234905A1
Application number: PCT/JP2018/021990
Authority: WO
Inventors: まなみ水村; 石井　良
Original assignee: 株式会社良品計画
Priority date: 2018-06-08
Filing date: 2018-06-08
Publication date: 2019-12-12
Also published as: CN112292047A; KR20210013172A; JP6763099B2; CN112292047B; JPWO2019234905A1

Abstract

Provided is a sock that exhibits the effect of not being prone to slipping down easily no matter the leg circumference and not making the user feel an excessive tightening force in a certain area. The sock comprises a cuff portion (11), leg portion (12), ankle portion (13), heel portion (14), sole portion (16), dorsum portion (15), and toe portion (17), the sock being formed so that the knitting pattern, which is defined by the extension length in the transverse direction, is constant in the leg portion (12) between the bottom of the cuff portion (11) and the ankle portion (13).

Description

socks

The present invention relates to a sock that has an effect of being difficult to slip off regardless of individual differences in leg thickness without partially feeling excessive tightening force.

Conventional socks are always subject to slippage. One possible cause of slippage is the lack of rubber support at the mouth. In general, we expect that slipping will be less likely by knitting rubber into the mouth and strengthening the support.

However, these socks have excessive tightening force, which not only causes pain to the wearer, but also cause problems such as the mouth part biting into the skin and causing blood circulation problems during wearing. There are some socks that do not tighten the mouth, seeking a comfortable wearing feeling for this problem, but socks without rubber knitted in the mouth do not bite into the skin, but the support force is weak accordingly The gap has not been eliminated.

Another possible cause of slippage is that the circumference of the leg increases from the ankle to the calf, so in Patent Document 1, the leg part and the mouth part are directed from the lower end of the leg part toward the upper end of the mouth part. It is disclosed to increase the degree continuously or stepwise to form a trumpet shape that substantially matches the shape of the leg leg portion, and in Patent Document 2, the stitches of the legs of the socks are worn. There is disclosed a sock that is knitted so as to gradually become smaller or gradually from the mouth toward the buttocks and that fits more with the shape of the foot.

In these prior arts, by knitting step by step according to the shape of the human leg, the leg fits and expects the effect of preventing the slippage, but the slippage cannot be prevented due to individual differences in the shape of the leg. There was a case. In addition, since the knitting shape of the leg portion is complicated, it takes time and labor to program knitting conditions during production and to set and adjust the knitting machine, which is not suitable for mass production. *

Japanese 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 an excessive tightening force partially and exhibits an effect of being difficult to slip off regardless of the leg thickness.

The present invention solves the above-mentioned problems, and is a sock comprising a mouth part, a leg part, an ankle part, a heel part, a sole part, an instep part, and a toe part, and is defined by a lateral extension dimension. The sock is formed so that the knitting pattern is constant in the leg portion between the bottom of the wearer and the ankle.

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

Further, the sock according to the present invention can make the knitting pattern constant from the bottom of the mouth part to the leg part of the ankle part, so that it is necessary to program the knitting conditions during production and to set the knitting conditions of the knitting machine. The time can be greatly shortened, and further, the time required for adjusting the variation of each knitting machine can also be shortened.

In addition, the sock according to the present invention can prevent the slippage of the sock without inserting the back thread rubber inside the leg part by adjusting the tightening force in the leg part of the ankle part from the bottom of the wearing mouth part. Therefore, the manufacturing cost can be further reduced.

(A) Embodiment example of the sock according to the present invention, (b) Positions a to d for measuring the “a-part elongation dimension” and “knitting pattern” which are the control factors of the sock according to the present invention. Factor effect diagram for variation in leg thickness (S / N ratio) Factor effect diagram for sensitivity of deviation

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 is difficult to slip off, it is only necessary to measure how much it slips off when the sock is actually worn, but just wearing it will not cause slippage. Therefore, exercise (evaluation technique) using an ergometer was taken, and the amount of displacement [mm] after the exercise with the ergometer for a certain time after wearing was measured.

(2. Outer factor)
Socks do not fall off immediately after wearing. It is conceivable that the gap gradually falls as time passes after wearing. In addition, since the stretch rate of the socks varies depending on the thickness of the legs, the fabric of the socks tends to be stretched as the person has thick legs, and it is considered that the sock does not follow the skin movement due to exercise and falls. Therefore, the exercise time [min] was adopted as the signal factor M, and the leg thickness [cm] at the mouth portion was adopted as the error factor N. Specifically, as the signal factor M, two levels of ergometer exercise time (M1: 2 [min], M2: 4 [min]) were set.

On the other hand, as the error factor N, the three legs of three subjects with different leg thicknesses are classified into 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 referred to the minimum and maximum circumference of the lower leg from the “AIST Human Body Dimension 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 factors and orthogonal table)
An embodiment of the sock 1 of the present invention is shown in FIG. The sock 1 is a sock comprising 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 knitted using a double cylinder, The mouth part 11 is knitted with a 1 × 1 knitted knitted pattern in which a front and a back are arranged for every 1 wal, and is about 5 cm in height. The leg part 12 is a 1 wal arranged for every 2 wales. It is knitted by × 1 knitting, and has a height of about 15 cm and a width of about 8.5 cm. In addition, the knitting method of the sock 1 of this invention is not limited to this, As long as each control factor mentioned later is realizable, it is good also as another knitting method.

As control factors for designing the sock 1, the surface yarn polyester count (A), the material and count of the cover yarn used for the back yarn FTY (covering yarn) (back yarn covering yarn count, B), the back yarn rubber count ( C), number of inserted rubbers (number of rubbers, D), stretched size of the mouthpiece 11 (a portion stretched size, E), knitting pattern (F), tightening strength (G), back yarn polyurethane count ( H) was 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 one 2-level factor and seven three-level factors can be set was adopted.

<Control factor A>
As the control factor A, “surface polyester count” was adopted. The two levels (A1 to A2) in the control factor A were set as follows. In addition, an actual surface yarn does not consist only of the control factor A, and it 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>
As the control factor B, “back yarn covering yarn count” was adopted. The three levels (B1 to B3) in 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 rubber count” was adopted as the control factor C. Further, three levels (C1 to C3) in the control factor C were set as follows.
Level 1 (C1): None Level 2 (C2): 90th Level 3 (C3): 100th

<Control factor D>
“Number of mouth rubbers” was adopted as the control factor D. Further, three levels (D1 to D3) in the control factor D were set as follows.
Level 1 (D1): 5 Level 2 (D2): 7 Level 3 (D3): 9

<Control factor E>
As the control factor E, “a-part elongation dimension” was adopted. Further, three levels (E1 to E3) in the control factor E were set as follows. FIG. 1B shows the position of the a part, and the a part extension dimension is defined as La. Here, the “elongation dimension” refers to the measurement of the dimension when the measurement part is sandwiched between both ends with a 10 mm diameter clamp and pulled laterally with a force of 3.5 kg. The same applies to the “elongation dimension” in the other control factors described below.
Level 1 (E1): 23 cm
Level 2 (E2): 25 cm
Level 3 (E3): 27cm

<Control factor F>
“Knitting pattern” was adopted as the control factor F. Here, the “knitting pattern” is determined by a combination of factors such as the size of stitches and stitches in knitting, the tension applied when rubber is inserted when there is a backing thread rubber, and in the present invention , And defined by a combination of elongation dimensions of arbitrary portions. Specifically, the three levels (F1 to F3) in the control factor F were set as follows. The bottom part of the mouth part 11, the middle part of the ankle part 13, the bottom part of the ankle part 13, and the ankle part 13 are b part, c part, and d part, respectively, and the extension dimensions of each part are Lb, Lc, Ld, respectively. A knitting pattern is defined by a combination of stretch 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, here, “step” means that the leg shape is formed so as to gradually become narrower at the same diameter reduction rate from the b portion to the d portion. In addition, the “anomaly” means that from the b portion to the c portion and from the c portion to the d portion are thinned at 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 portion shape is formed in a cylindrical shape having the same diameter.

<Control factor G>
As the control factor G, “tightening strength” was adopted. Further, the three levels (G1 to G3) in the control factor G were set as follows. The strength of tightening force is expressed by changing the elongation dimension 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, “back yarn polyurethane count” was adopted. The three levels (H1 to H3) in 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 a summary of the assignment of the control factors, and Table 3 shows an L18 orthogonal table, which is a table showing the 18 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 with the experiment number 1 indicates that the control factors (A to H) are all knitted as level 1. The other 17 experimental conditions (experiment numbers 2 to 18) can be similarly expressed as AnBnCnDnEnFnGnHn (n = 1, 2, 3) with reference to the L18 orthogonal table shown in Table 1.

In 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 amount of deviation as a 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 determined (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 the variation in the measurement result. Further, the sensitivity in FIG. 3 indicates that the lower the value, the smaller the amount of deviation drop. Each level will be discussed with reference to FIGS.

In the control factor A, the SN ratio is higher in “level 2 (A2): 1.3 tex”, and the sensitivity is lower in “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): 0.9 tex”, which has a low sensitivity, as the control factor A. However, it can be seen that the influence is small when compared with the influence degree of the control factor related to the difficulty of slippage, which will be described later. From this, it can be seen that polyester was used as the material for the surface yarn in this experiment, but even if only natural fibers were used, there was no significant effect on slippage.

In the control factor B, the SN ratio of “Level 2 (B2): Polyester 75 denier” is high, but the sensitivity is also high. This can be considered that the thicker the thread used for the back thread, the greater the amount of slipping off regardless of the leg thickness. On the other hand, “Level 1 (B1): Nylon 30 denier” and “Level 3 (B3): Nylon 140 denier” have the same SN ratio, but “Level 1 (B1): Nylon 30 denier” has a lower sensitivity. . Therefore, it was found that the yarn used for covering the back yarn should be fine.

Control factor C has a high S / N ratio of “Level 1 (C1): None”, but the sensitivity is extremely high. It can be considered that if there is no backing thread rubber, “the amount of slippage is large regardless of the thickness of the legs”. 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 turned out that it is better to insert the back thread rubber.

In the control factor D, there was no great difference in the SN ratio at each level, and it was found that increasing the number of gums lowers the sensitivity, so it is better to increase the number of gums.

For 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. It turned out that the smaller the size of the mouth, the better.

In the control factor F, there is no great difference in the S / N ratio at each level, and the sensitivity of “Level 3 (F3): constant” is the lowest. Therefore, the knitting pattern can be changed without changing the knitting pattern to force the leg shape. It was found that the effect can be exhibited by forming the leg part into a constant cylindrical shape with a constant.

The control factor G has a high SN ratio of “Level 1 (G1): Strong” and the lowest sensitivity. Therefore, it was found that the tightening strength should be as strong as possible.

In the control factor H, there is no great difference in the SN ratio at each level, and the sensitivity of “Level 1 (H1): 20 denier” is the lowest. Therefore, it is preferable that the core material of FTY used for the back thread is as thin as possible I understood.

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 optimal. This may be because thin threads are easier to follow along the legs.

From the above, A1B1C2D3E1F3G1H1 was the optimum condition for creating a sock that is highly robust with respect to the difference in the thickness of the legs and is difficult to slip off. However, when making socks with this combination, it is possible that the tightening force is too strong for people with thick ankles to calves.

(5. Selection of optimum conditions)
The control factors mainly related to the tightening force are the “backing rubber count” of the control factor C and the “tightening strength” of the control factor G. Accordingly, 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 numbers 1 to 6). When selecting the control factor C “level 2 (C2): 90”, the control factor G selects “weak” with a high S / N ratio, so that the tightening force at the time of actual wearing becomes too strong. Disappear. In selecting the optimum conditions, the SN ratios and sensitivity estimates of the optimum conditions and the standard conditions are obtained (Table 7, estimated values), and based on the evaluation results of the measurement characteristic values described above, the SN ratio is determined according to the standard conditions. The sensitivity was set to be about the same or higher and the sensitivity was sufficiently lower than the standard conditions.

If “Level 1 (C1): None” is selected as the control factor C, the cost of the back rubber can be reduced. In that case, by selecting “level 1 (G1): strong” having the highest S / N ratio and the lowest sensitivity, the control factor G can be a sock that is unlikely to slip off even without the back 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 on the optimal conditions of socks that are less likely to slip and have a moderate tightening force. As a result of subjective evaluation, these combinations of socks are evaluated as having too tight tightening force. In addition, the combination as the standard condition here is A2B2C1D2E2F1G2H3 (Table 6, standard).

As a result of the confirmation experiment, it was found that the sensitivity of the optimum condition was remarkably lower than that of the standard condition in any of the combinations, and it was clearly difficult to lose the deviation. Note that the S / N ratio of the confirmation experiment is higher under the standard condition, which means that “the amount of displacement drop 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 in the parts b to d are constant rather than complicated knitting such as changing the stitches, the size of the stitches, the tension of the back thread rubber, and the like step by step. That is, the stretch dimensions in the b part, the c part, and the d part 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 to set the tightening strength to “weak”. When the back rubber is not inserted, it is desirable to set the tightening strength of the parts b to d to “strong”. In addition, when the tightening force strength “weak” and “strong” are expressed in terms of the elongation of the leg portion, the following ranges are preferable.
Weak: 22cm ≦ Lleg ≦ 26cm
Strong: 18cm ≦ Lleg ≦ 22cm
(3) The FTY used for the back thread is preferably a thin thread as a whole regardless of the material. Specifically, covering yarn is preferably 75 denier or less, and core yarn is 30 denier or less.
(4) Since the wearing mouth portion needs an appropriate tightening force, the stretch dimension is not increased and is preferably 25 cm or less, more preferably 23 cm. Further, it is preferable to insert a mouth rubber at the upper end of the wearing mouth portion to increase the number as much as possible, and 7 or more are desirable.

According to the present invention, since the knitting pattern can be made constant in the leg portion of the ankle from the bottom of the wear mouth, the time required for programming the knitting conditions during production and setting the knitting conditions of the knitting machine is greatly increased. In addition, the time required for adjusting the variation of each knitting machine can be shortened, and the present invention has industrial applicability such as contributing to mass production.

1 ... ... Socks 11 ... ... Wearing mouth part 12 ... ... Leg part 13 ... ... Ankle part 14 ... ... Butt part 15 ... ... Instep part 16 ... ... Sole part 17 ... ... Toe part

Claims

A sock consisting of a mouth part, a leg part, an ankle part, a heel part, a sole part, an instep part, and a toe part, and a knitting pattern defined by a lateral extension dimension is formed from the bottom of the mouth part to the ankle part. Socks that are formed so as to be constant at the legs between them.
The sock according to claim 1, wherein the leg portion has a lateral extension in a range of 18 to 26 cm.
3. The tightening force strength at the leg portion is in the range of 18 to 22 cm as an extension dimension of the leg portion, and the leg portion does not have a back thread rubber. socks.
3. The sock according to claim 1, wherein the tightening strength at the leg part is in the range of 22 to 26 cm in terms of the extension of the leg part, and the leg part has a back rubber.