TWI580364B - Swimsuit - Google Patents

Description

Swimsuit

The present invention relates to a swimming swimsuit. More preferably, it is a swimsuit for swimming competition.

One of the functions required for a swimsuit or swimming cap is how to reduce the surface frictional resistance of the swimsuit produced in the swimming competition. Various types of swimsuits have been proposed since the prior art, and Patent Document 1 proposes a swimsuit having a striped pattern by embossing. In the patent documents 2 to 4, the applicant proposes a swimsuit in which a stripe pattern formed by embossing, a water-repellent portion, and a non-water-repellent portion are arranged in stripes in the body length direction.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2002-212811

[Patent Document 2] Japanese Patent Laid-Open Publication No. 2000-226709

[Patent Document 3] Japanese Patent Laid-Open Publication No. 2000-314015

[Patent Document 4] Japanese Patent Laid-Open Publication No. 2006-348398

However, the above-mentioned conventional swimsuit has a problem that the surface friction resistance is high, and further improvement is required.

In order to solve the above conventional problems, the present invention provides a swimsuit having a low surface frictional resistance.

The swimsuit of the present invention is composed of a stretchable water-repellent fabric, and includes at least a portion of a stripe pattern in a body length direction, and the stripe pattern includes a concave stripe portion and a convex stripe portion. And the convex stripe portion has an independent recess pattern.

The swimsuit of the present invention includes a stripe pattern in the body length direction, and is subjected to a water repellent treatment, and the stripe pattern includes a concave stripe portion and a convex stripe portion, and the convex stripe portion has an independent recess pattern, thereby providing a surface Swimwear with low frictional resistance.

1‧‧‧Swimwear fabrics

2‧‧‧ recessed stripe

3‧‧‧ convex stripe

4‧‧‧Independent recess pattern

5‧‧‧ Body length direction (length direction)

20, 22‧ ‧ swimsuits

21, 23‧‧‧ striped pattern

31‧‧‧Cylindrical matrix (model)

32‧‧‧Swimwear fabrics

33, 46‧‧‧ front end of the model

34‧‧‧After the model

40‧‧‧Friction resistance measuring device

41‧‧‧Sink

42‧‧‧ water

43‧‧‧ Masking

44‧‧‧ lights

45‧‧‧High speed camera

47‧‧‧Laser points

48‧‧‧1st measuring point

49‧‧‧2nd measuring point

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic plan view of a swimsuit fabric in accordance with an embodiment of the present invention.

2A is an enlarged plan view of the swimsuit fabric of FIG. 1, and FIG. 2B is an enlarged view of the recess pattern of FIG. 2A when the corner of the diamond is rounded.

Figure 3 is a cross-sectional view of the swimsuit fabric of Figure 2 taken along line I-I.

Figure 4 is a schematic top view of the swimsuit.

Figure 5 is a schematic rear view of the swimsuit.

Fig. 6A is a schematic front view of a swimsuit according to another embodiment of the present invention, and Fig. 6B is a schematic rear view of the swimsuit.

Fig. 7A is a side view of a cylindrical substrate for measuring frictional resistance in water according to an embodiment of the present invention, and Fig. 7B is a cross-sectional view taken along line I-I.

Fig. 8 is an explanatory view showing an apparatus for measuring the time during which a cylindrical substrate falls in water according to an embodiment of the present invention.

Fig. 9 is an explanatory view showing a method and an apparatus for measuring the time when a cylindrical substrate falls within a predetermined distance in water according to an embodiment of the present invention.

Fig. 10A is a perspective view showing a state in which a cylindrical base body is unfolded according to an embodiment of the present invention, and Fig. 10B is a plan view showing the case.

The swimsuit of the present invention is formed into a swimsuit by including a stripe pattern in the body length direction and sewing the water-repellent cloth. The stripe pattern of the cloth includes a concave stripe portion and a convex stripe portion, and an independent recess pattern is formed in the convex stripe portion, whereby surface friction resistance can be reduced. That is, the convex stripe portion maintains the state of the cloth structure, but if a minute independent recess pattern is formed here, the surface frictional resistance is lowered. The independent concave pattern is a circle, an ellipse, an oblong, a diamond, a square, or the like. The area of a separate recess pattern is preferably 0.05 to 5 mm ² , and more preferably 0.1 to 4 mm ² . The stripe pattern and the independent recess pattern in the stripe portion of the convex portion are preferably formed on the entire surface of the swimsuit, but may be formed in a part. When it is formed in a part, it is preferably 50% or more, more preferably 70% or more, and still more preferably 90% or more in terms of area ratio.

The width of the stripe portion of the concave portion and the stripe portion of the convex portion is preferably 3 to 15 mm each, more preferably For each 5~12mm. As long as it is in this range, the surface frictional resistance becomes low. The width of the concave stripe portion and the convex stripe portion may be the same or different, but it is preferable that the width of the concave stripe portion is narrower. Further, it is preferable that the bottom of the independent concave pattern is shallower than the bottom of the concave stripe portion. Thereby, the surface frictional resistance can be further reduced.

The independent recess pattern is preferably rectangular and arranged diagonally along the body length direction. The rectangle is preferably a diamond shape. It is especially preferable to arrange the elongated diamond shape (diamond pattern) along the body length direction. The angle of the diamond is preferably rounded in shape. Thereby, the surface frictional resistance can be further reduced. Further, the independent recess pattern may be elliptical or oblong, and the long axis may be arranged along the body length direction. Thereby, the surface frictional resistance can be further reduced.

The above-described independent recess pattern is preferably regularly arranged. Thereby, it is possible to prevent turbulent flow and further reduce the surface frictional resistance. Further, the concave stripe portion and the independent recessed portion pattern are preferably formed by embossing. Accurate patterns can be imparted by embossing.

In the present invention, the cloth may be either a woven fabric or a knitted fabric. As an example, there is a knitted fabric having ductility in both the longitudinal and transverse directions by interlacing a synthetic fiber multifilament yarn with a spandex. Further, as the knitted fabric form, a single-sided circular knitted fabric as a circular knitted fabric, a double-sided circular knitted fabric, a tricot warp knitting as a warp knitted fabric, and Raschel can be used. Any one of the warp knitting, but it is better for the Tsukult warp in terms of the ease of the movement, the thinness of the fabric, and the like.

In the case where a stronger supporting force is required, as a material form, it is more preferable to use a composite yarn obtained by coating a spandex elastic fiber with a synthetic fiber multifilament yarn for a warp and weft woven fabric.

The fineness of the spandex fiber is preferably 22 decitex or more and 156 decitex or less. Further, the spandex fibers used may be well known, for example, may be used. "ROICA" of Asahi Kasei Fiber Co., Ltd. or "LYCRA" of TORAY OPELONTEX Co., Ltd., etc. Depending on the type of spandex, the stress is different, so it is preferable to appropriately select it depending on the area of use. However, in the case of a swimsuit, since it is used in a swimming pool, it is preferable to use Spencex which is excellent in chlorine resistance, such as "ROICA SP" or "LYCRA 176B", "LYCRA 254B", "LYCRA 909B". Elastic fibers are preferred.

The synthetic fiber multifilament yarn is preferably a synthetic fiber such as a polyamide fiber or a polyester fiber in terms of strength or workability. The fiber form and cross-sectional shape of the synthetic fiber are not particularly limited. However, in order to form a fabric having high ductility, it is preferable to perform crimping by a well-known method, and to provide a smooth surface. It is preferred to use straight raw silk.

The elongation of the above-mentioned expanded fabric in the longitudinal direction and the transverse direction is preferably 30 to 250%, and more preferably 60 to 180, as measured by the JIS L1096 A cutting strip method (17.7 N (1.8 kg) load, 5 cm width). %. As long as the ductility is in the above range, it has moderate stretchability and is easy to wear, and is suitable for sportswear materials including swimwear.

In the case of the above-mentioned stretched fabric in the case of the woven fabric, it is preferably a plain weave fabric, a twill weave, etc., and in the case of a knitted fabric, it is preferably a lacquer knitting, a raschel knitting or the like. The above-mentioned stretched fabric can be used for one part of the swimsuit, and can also be used for all.

The swimwear swimsuit is preferably made in a style that is about 10% to 40% smaller than the human body. If so, it can be worn on the human body in a fit.

Hereinafter, the description will be made using the drawings. In the following figures, the same symbols denote the same items. 1 is a schematic plan view of a swimsuit fabric 1 in accordance with an embodiment of the present invention. The swimsuit fabric 1 includes a stripe pattern along the body length direction (length direction) 5, and the stripe pattern includes a concave pattern The partial stripe portion 2 and the convex stripe portion 3 are formed with independent recess pattern 4 in the convex stripe portion 3. 2A is an enlarged plan view of the swimsuit fabric of FIG. 1. The recess pattern 4 is formed by a diamond pattern along the body length direction (length direction) 5. Fig. 2B is an enlarged view of the concave pattern of Fig. 2A when the corner of the diamond is inlaid into a circular shape.

Figure 3 is a cross-sectional view of the swimsuit fabric of Figure 2 taken along line I-I. In this example, the bottom of the independent recess pattern 4 is shallower than the bottom of the recess stripe portion 2.

Fig. 4 is a schematic front view of a swimsuit for women according to an embodiment of the present invention, and Fig. 5 is a schematic rear view of the swimsuit. The swimsuit 20 includes a stripe pattern 21 composed of a concave stripe portion and a convex stripe portion (the illustration of the independent recessed portion pattern in the convex portion stripe portion is omitted).

Fig. 6A is a schematic front view of a male swimsuit according to another embodiment of the present invention, and Fig. 6B is a schematic rear view of the swimsuit. The swimsuit 22 includes a stripe pattern 23 composed of a concave stripe portion and a convex stripe portion (the illustration of the independent recess pattern in the convex stripe portion is omitted).

[Examples]

Hereinafter, the present invention will be specifically described by way of examples. Furthermore, the present invention is not limited to the following examples.

<elongation rate>

The measurement was carried out in accordance with JIS L1096 A cutting strip method. The width of the test piece was set to 5 cm, and the nip interval was set to 20 cm. The initial load was set to correspond to the load applied to the gravity of the length of 1 m in width of the test piece. The stretching speed was set to 20 cm/min. The elongation (%) at a load of 17.7 N (1.8 kg) was measured. Elongation indicates ductility.

<Friction resistance in water>

The measurement method and apparatus shown in Figs. 7 to 9 were used. Fig. 7A is a side view of a cylindrical substrate (model) used for the measurement, and Fig. 7B is a cross-sectional view taken along line II of Fig. 7A. The front end 33 of the cylindrical base body (model) 31 has a spherical shape, and the rear end 34 has a tapered shape. A cloth sample 39 of the swimsuit is attached to the cylindrical portion 32. In the mounting system, the cloth sample 39 is wound around the cylindrical portion 32, pressed by the cylindrical jigs 38a and 38b, and inserted into the front end portion 33 and the rear end portion 34. The area of the cloth sample 39 attached to the cylindrical portion 32 is about 0.016 mm ² . A weight 35 is inserted into the lower portion of the cylindrical portion 32. Further, a hollow portion (tube) 36 is inserted into the shaft portion of the cylindrical base body (model) 31 in advance, and the wire 37 is inserted therein as shown in Figs. The cylindrical base body (model) 31 has a weight in water of 0.3 N in a state in which the swimsuit cloth is attached, and a volume of 1.2 × 10 ^-3 m ³ . The whole is made of resin. The diameter of the hollow portion 36 is set to 2.3 mm. The model 31 has a diameter of 30 mm, a length of 300 mm, and a portion of the cloth to be mounted is 200 mm. The quality is uniform: 88g including the sample of the cloth to be installed, and the weight is added to the inside of the substrate in consideration of the buoyancy of the cloth and the model, and the weight in the water becomes 0.3N.

Fig. 8 is an explanatory view showing a device 40 for measuring the time during which the cylindrical substrate falls in water. Water 42 is added to the transparent water tank 41 made of an acrylic resin or the like in advance. The shielding sheet 43 is attached to the inside of the water tank 41, the lamp 44 is disposed on the rear side, and the high speed camera 45 is disposed on the front side. The water tank 11 is made of a transparent acrylic resin, and has a height (H) of 1.7 m, a width (L) and a depth of 0.22 m, respectively, and the high-speed camera 15 is disposed at a position of 4.25 m from the water tank and a height of 0.85 m from the ground. . The shooting speed of the high speed camera 15 is set to 1900 fps. In this state, the cylindrical base body (model) 31 is gently dropped from above the water tank. The cylindrical base (model) 31 falls along the line 37.

Fig. 9 is an explanatory view showing a method and an apparatus for measuring the time when a cylindrical substrate falls within a predetermined distance in water according to an embodiment of the present invention. First, the rear end of the cylindrical base body (model) 31 is disposed on the water surface, and the lower side of the front end 46 is set to be 200 mm below the laser spot 47, and the lower side of the laser spot 47 is set to the first measurement point 48. , the first measurement point 48 The lower side of 100 mm is set as the second measurement point 49. The laser spot 47 is formed by opening a mask 43 as shown in FIG. In this state, the cylindrical base body (model) 31 is gently dropped, and when the front end 46 passes the laser spot 47, high-speed photography of the high-speed camera is started, and the measurement falls from the first measurement point 48 to the second measurement point 49. Time. Each sample was measured 10 times, and the average value thereof was used. The acceleration is obtained by the following calculation formula (number 1).

(where k ₁ is the falling distance (mm) of the laser spot 47 to the first measuring point 48 of FIG. 9 , and t ₁ is the passing time (seconds) of the laser spot 47 to the first measuring point 48 of FIG. 9 , k ₂ is the distance (mm) from the first measurement point 48 to the second measurement point 49, and t ₂ is the passage time (second) from the first measurement point 48 to the second measurement point 49. In the case of this example, k ₁ is set. 100mm, k _{2 is} set to 200mm)

The frictional resistance coefficient C _f of the swimsuit fabric in water is calculated by the following formula (number 2) (number 3). The measurement accuracy of the frictional resistance coefficient C _f is as high as 0.001.

Where W is gravity and W=mg (m is the mass of the cylindrical matrix (kg), g is the gravitational acceleration (m/s ² )), B is buoyancy and B = ρ _w gV (the density of ρ _w water) (kg/m ³ ), volume of V-based cylindrical substrate (m ³ )), D-line resistance and D=C _f ×(1/2)×ρu ² A (density of ρ-type water, u-system drop speed , A type of swimsuit fabric surface area)

Fig. 10A is a perspective view of the cylindrical base body when it is unfolded, and Fig. 10B is a plan view of the case. In order to attach the cloth sample, the cloth is wound around the cylindrical portion 32, pressed by the cylindrical jigs 38a and 38b, and the front end portion 33 and the rear end portion 34 are inserted.

(Example 1)

<Use of Yarn>

Polyester multifilament raw silk (44 decitex) and spandex elastic fiber ("LYCRA 254B" 44 decitex) were used.

<Knitted fabric>

Knitted fabrics of half tricots were woven using a 32-gauge turkey warp knitting machine. The knitted fabric is dyed and water-repellent. The water repellent treatment is fixed to the woven fabric using a known fluorine-based water repellent treatment agent. Then embossing is performed. The embossing process roll temperature was set to 220 ° C, the line pressure was set to 5500 kgf, and the roll speed was set to about 6 to 10 m/min. The mass per unit area (weight per unit area) of the knitted fabric was 230 g/m ² . The friction resistance value obtained by measuring the knitted fabric from the measuring apparatus of Figs. 7 to 9 was 0.078. The dimensions in Figure 2 are as follows.

The total length of the concave stripe portion and the convex stripe portion is a1: 16 mm

The width of the concave stripe portion 2 is a2: 7 mm

The width of the convex stripe portion 3 is a3: 9 mm

The length a4, a6 of the ends of the convex stripe portion 3 to the end of the recess diamond pattern 4: 1 mm each

The width of the concave diamond pattern 4 is a5:1 mm

The length of the concave diamond pattern 4 a7: 1.14mm

The interval between the longitudinal direction of the concave diamond pattern 4 is a8: 2.3 mm

Depth of the concave stripe portion 2: about 0.05 mm

Depth of diamond pattern 4: about 0.03mm

Knitted fabric thickness: 0.60mm

The elongation of the knitted fabric was 134% in the machine direction (body length direction) and 123% in the transverse direction.

<Swimwear>

The swimsuit for swimming competition shown in Figs. 4 to 6 was sewn using the obtained knitted fabric. The swimsuit was subjected to a wearing test, and as a result, it was confirmed that the swimsuit was as follows: the ductility was high and it was easy to wear, and the adhesion to the human skin was also better, and the water flow resistance was also lowered, which was suitable for swimming competition.

(Example 2)

<Use of Yarn>

Coated yarn: nylon filament raw silk (fineness 33 decitex, number of filaments 10), core yarn: "LYCRA 176B" (fineness 44 decitex), single covered yarn (SCY).

<woven fabric>

An expanded woven fabric was made using the above yarn. Using a sword looms, the longitudinal density: 180 / 2.54 cm, the lateral density: 178 / 2.54 cm, the weight per unit area (weight per unit area) was 135 g / m ² , and the thickness per unit area was 0.28 mm. The fabric structure was set to be plain weave. The woven fabric was subjected to water repellent processing and embossing in the same manner as in the first embodiment. The woven fabric had an elongation of 56.2% in the warp direction and 51.9% in the weft direction. Further, the frictional resistance coefficient was 0.077. The swimsuit for swimming competition shown in Figs. 4 to 6 was sewn using the obtained knitted fabric. The swimsuit was subjected to a wearing test, and as a result, it was confirmed that the swimsuit was as follows: the ductility was high and it was easy to wear, and the adhesion to the human skin was also better, and the water flow resistance was also lowered, which was suitable for swimming competition.

(Comparative Example 1)

A knitted fabric was produced in the same manner as in Example 1 except that the concave diamond pattern 4 was not produced. The obtained knitted fabric had a frictional resistance coefficient of 0.081. The swimsuit for swimming competition shown in Figs. 4 to 6 was sewn using the obtained knitted fabric. The swimsuit was subjected to a wearing test, and as a result, the water flow resistance was higher than that of Example 1.

(Comparative Example 2)

A woven fabric was produced in the same manner as in Example 2 except that the concave diamond pattern 4 was not produced. The friction coefficient of the obtained woven fabric was 0.079. The swimsuit for swimming competition shown in Figs. 4 to 6 was sewn using the obtained knitted fabric. The swimsuit was subjected to a wearing test, and as a result, the water flow resistance was higher than that of Example 2.

[Industrial availability]

In addition to swimsuits, the swimsuits of the present invention can also be used for marathon or trail running tights, tight pants, shirts, skating suits, ski suits, jumpsuits, rhythmic suits, soccer uniforms, baseball uniforms, mountaineering clothes, and the like. A garment or a protective garment such as a sportswear or sports underwear, a garment having a supporting function, and the like are exemplified for preferred use.

1‧‧‧Swimwear fabrics

2‧‧‧ recessed stripe

3‧‧‧ convex stripe

4‧‧‧Independent recess pattern

5‧‧‧ Body length direction (length direction)

Claims (13)

A swimsuit comprising a stretchable water-repellent fabric, wherein at least a portion includes a stripe pattern in a body length direction, and the stripe pattern includes a concave stripe portion and a convex stripe portion. And the convex stripe portion has an independent recess pattern. The swimsuit of claim 1, wherein the bottom of the independent recess pattern is shallower than the bottom of the recessed portion of the recess. The swimsuit of claim 1, wherein the independent recess pattern is rectangular and arranged diagonally along the body length direction. The swimsuit of claim 1, wherein the independent recess pattern is elliptical or oblong, and the long axis is disposed along the length direction of the body. The swimsuit of claim 1 is wherein the above-mentioned independent recess pattern is regularly arranged. The swimsuit of claim 1, wherein the concave stripe portion and the independent recessed portion pattern are embossed patterns. For example, in the swimsuit of claim 1, the area of one of the above independent recess patterns is 0.05 to 5 mm ² . The swimsuit according to claim 1, wherein the stripe pattern and the independent recess pattern in the stripe portion of the convex portion are formed on the entire surface of the swimsuit or in an area ratio of 50% or more. The swimsuit of claim 1, wherein the width of the concave stripe portion and the convex stripe portion is 3 to 15 mm. The swimsuit of claim 1, wherein the fabric of the swimsuit is extensible in both the longitudinal and transverse directions by interlacing the synthetic multifilament yarn with the spandex elastic fiber. Knitted fabric. For example, in the swimsuit of claim 1, the cloth of the above swimsuit is a composite yarn obtained by coating a spandex elastic fiber with a synthetic fiber multifilament yarn for a warp and weft woven fabric. The swimsuit of claim 1, wherein the fabric of the swimsuit has ductility and is elongated in the longitudinal direction and the transverse direction by a JIS L1096 A method (17.7 N (1.8 kg) load, 5 cm width). The rate is 30~250%. For example, the swimsuit of the first application of the patent scope, wherein the swimsuit is a swimsuit for swimming competition, is made in a style of about 10% to 40% smaller than the human body.