Patent Application
20200022426
The present invention relates to a bottom wear.
Among occupational diseases, low back pain is one of diseases incident to workers during working, and is spreading in various types of occupations. Examples of occupational workers who have a high risk of being attacked by low back pain include those relating to transportation business where workers are engaged in handling heavy weight articles and in long-distance driving and medical workers working for assistance of inpatients and treating emergency patients, and recently, the number of workers relating to services in social welfare facilities for care of the elderly and the like and suffering from low back pain has considerably increased. Further in recent years, personal computers have been spreading into job sites and homes, and a work for operating a mouse and a keyboard for many hours while gazing a display is a new factor of causing low back pain.
The number of occupational workers suffering from low back pain tends to increase as an age becomes older, but only a few people take a measure at an initial stage of low back pain, and there are not a few people who take no step until the low back pain gets worse. In addition, Japan is facing a problem with a decreased working-age population due to low birthrate and longevity, and there is an increasing number of senior workers of 65 years old or older and woman workers in the light of support of a society. Such being the case, importance of maintenance and promotion of health of valuable workers is increasing more than before, and also in case of working uniforms, a viewpoint of keeping health of workers positively becomes important in addition to conventional functions such as safety, easy action and discrimination.
In order to prevent low back pain, it has been considered effective to tighten a waist of a wearer, in particular a portion including an upper part of a pelvis of the wearer with a protection band for lumbago, and increase an abdominal pressure. The purpose of this is to decrease a burden of a waist by forming an abdominal cavity into a shape like a rugby ball to work as a support. However, there is a problem that since such a protection band for lumbago is mostly worn under a wear; and must be worn on a body after taking off the wear, fitting thereof is troublesome and that also when adjusting the fastening of the waist protection band after wearing it, since a degree of the fastening must be adjusted after the wear is taken off or loosened, this work is troublesome.
Thus, a sportswear with protections for lumbago is known in which protections for lumbago can be integrally attached to a sportswear such as sports trousers or the like, and the degree of tightening the protections for lumbago tightness can be easily adjusted (see Patent Document 1). This wear has a configuration in which it is possible to tighten a waist portion of a wearer by protections for lumbago and adjust the degree of tightening without taking off or loosening the wear, and the problem is solved that operations of tightening a waist portion of a wearer by protections for lumbago, etc. are troublesome.
Patent Document 1: Japanese Patent Laid-open Publication No. 10-46409
However, in the sportswear with protections for lumbago as disclosed in Patent Document 1, the protections for lumbago are fixed around the waist of a wear main body. Thus, when a wearer repeatedly makes an expansion and contraction motion of changing the posture from an upright posture to a crouching posture or from a crouching posture to an upright posture over a plurality of times, the waist portion protecting portion may be slid in a wearer's stature direction with respect to a waist portion of the wearer as a portion around the waist of the main wear body is slid in the wearer's stature direction. The sportswear with protections for lumbago as disclosed in Patent Document 1 has a structure in which the protections for lumbago are in direct contact with an underwear worn by the wearer. Thus, the sportswear with protections for lumbago has the problem that when the upper end of the protections for lumbago is unintentionally locked in the underwear worn by the wearer, the underwear is slid in the wearer's stature direction with respect to the waist portion of the wearer as the protections for lumbago are slid in the wearer's stature direction with respect to the waist portion of the wearer, and thus the wearer has an unpleasant feeling.
Thus, the present invention has been made in view of the above-described problems, and an object of the present invention is to provide a bottom wear suitable for use with a protection band for lumbago for tightening a waist portion of a wearer, the bottom wear being capable of suppressing a situation in which an underwear worn by a wearer is slid in a wearer's stature direction with respect to the wearer's waist portion as the posture of the wearer tightened at the waist portion by the protection band for lumbago is changed as described above.
For solving the above-described problems, the present invention discloses the following constitution and more preferable aspects.
1. A bottom wear including a waist-encircling section, wherein
a cylindrical part including a cloth of bottom wear and a planar material different from the cloth, or a cylindrical part including a planar material different from the cloth of bottom wear is present at a back portion of the waist-encircling section and inside the bottom wear,
the cylindrical part is disposed in such a manner that the axis direction of the cylindrical part is substantially parallel to the waist-encircling direction of the waist-encircling section,
the static friction coefficient of the inner surface of a rear portion of the cylindrical part is 0.2 to 1.0, and
the stress of a front portion of the cylindrical part at 10% elongation in the transverse direction of the cylindrical part is 10 N/25 mm or less.
2. The bottom wear according to item 1, wherein the static friction coefficient of the surface of a part of the front portion of the cylindrical part, which is close to a human body, is 0.2 to 1.0.
3. The bottom wear according to either of the above items, wherein the cylindrical part includes a cloth of bottom wear and a planar material different from the cloth, and
the upper part and the lower part of the planar material are each continuously or intermittently connected to the cloth of bottom wear.
4. The bottom wear according to either of the above items, wherein the cylindrical part includes a planar material different from the cloth of bottom wear, and
the upper part and the lower part of the cylindrical part are each continuously or intermittently connected to the cloth of bottom wear.
5. The bottom wear according to either of the above items, wherein the planar material is a fabric.
6. A bottom wear with a band which includes the bottom wear set forth in either of the above items, and a protection band for lumbago.
It is possible to provide a bottom wear suitable for use with a protection band for lumbago for tightening a waist portion of a wearer, the bottom wear being capable of suppressing a situation in which an underwear worn by a wearer is slid in a wearer's stature direction (hereinafter, sometimes referred to as “slipping-up”) as is seen when the wearer repeatedly makes a motion of changing the posture from an upright posture to a crouching posture or from a crouching posture to an upright posture over a plurality of times.
The meanings of the terms used in the present invention are as follows
Bottom wear: a wear worn on a lower body, e.g. a skirt or pants such as slacks, jeans, chino pants, cargo pants and shorts.
Waist-encircling section: a part or the whole of a bottom wear which comes into direct or indirect contact with a portion around a body surface at a portion ranging from a lower part of a spinal column to a pelvis of a wearer at the time when the bottom wear is worn. The waist-encircling section may have at least one selected from the group consisting of a waist portion including a belt loop, side pockets, back pockets and front and back fasteners, and a rise portion of trousers.
Back portion: a part of a bottom wear which comes into direct or indirect contact with the back of a wearer.
Cylindrical part: a cylindrical part present on a waist-encircling section and a back portion of a bottom wear. The cylindrical part is present on the front part of the back portion of the bottom wear main body. The cylindrical part is not necessarily required to have a circular cross-section, and may have a hollow cross-section, or a cross-section which can be made hollow. The cylindrical part may be collapsed, or folded into a substantially planar shape. The axial direction of the cylindrical part is also a length direction of the cylindrical part.
Cylindrical part in the first embodiment of the present invention: a cylindrical part including a cloth of bottom wear and a planar material different from the cloth.
Cylindrical part in the second embodiment of the present invention: a cylindrical part including a planar material different from a cloth of bottom wear.
Invention of the first embodiment: an invention having a cylindrical part according to the first embodiment.
Invention of the second embodiment: an invention having a cylindrical part according to the second embodiment.
Rear portion of cylindrical part: the cylindrical part is connected to the bottom wear at the upper part of the rear portion. The rear portion can be divided into two portions by a connecting line and a line with the cylindrical part situated on the lowermost side. Among the above-mentioned portions, the rear portion is a portion far from a wearer. In the first embodiment, the rear portion is a “bottom wear cloth 5 on a back portion in a waist-encircling section” in
Front portion of cylindrical part: the cylindrical part is connected to the bottom wear at the upper part of the rear portion. The rear portion can be divided into two portions by a connecting line and a line with the cylindrical part situated on the lowermost side, and among the above-mentioned portions, the front portion is a portion close to a wearer. In the first embodiment, the front portion is a “front portion 6 of a cylindrical part” in
Front: a frontward direction of a wearer in a bottom wear (symbol 19 in
Rear: a rearward direction of a wearer in a bottom wear (symbol 20 in
Hereinafter, the present invention will be described with reference to the drawings, but the present invention is not limited to the following disclosure.
First, the bottom wear according to the first embodiment will be described.
In addition, the waist-encircling section 2 of the bottom wear 1 according to the first embodiment has a cylindrical part 3 on a back portion 18 thereof. The cylindrical part 3 is disposed in such a manner that the axis direction of the cylindrical part is substantially parallel to a waist-encircling direction 4 of the waist-encircling section.
See
Next,
The upper end of the cylindrical part front portion 6 including the planar material is continuously or intermittently connected to the bottom wear cloth 5 by a locking portion 7 in the waist-encircling direction. Preferably, the upper end of the planar material forming the cylindrical part front portion 6 is connected to the waist-encircling section as in the configuration in
It is to be noted that the present invention is not limited to the configuration shown in
In addition, in
The lower end portion of the planar material can be fixed so as to extend along the inner surface of the cloth of bottom wear. As a result, a waist portion band is neatly inserted into the cylindrical part. In addition, it is possible to suppress uncontrollable movement of the lower end portion of the planar material inside the bottom wear. It is possible to suppress bending of the planar material inside the bottom wear, and therefore a wearer can smoothly insert a protection band for lumbago into the cylindrical part while wearing the bottom wear.
The present invention is not limited to the configuration shown in
In the bottom wear configured to have a cross-section as in
The cloth of bottom wear in the bottom wear according to the first embodiment will now be described. In the bottom wear of this embodiment, the cloth of bottom wear is a cloth other than the planar material forming the cylindrical part front portion, among members forming the bottom wear.
Next,
The waist portion protecting portion 10 of the protection band for lumbago 9 shown in
The waist portion protecting portion may be made of a material being the same as or different from that of the belt portion. Fabric, synthetic leather or the like can be used as the material of the waist portion protecting portion and the belt portion. The material is preferably fabric because the protection band for lumbago can be made selectable. As the material of the above-mentioned fabric, synthetic fibers such as polyethylene terephthalate fiber and polyamide fiber, natural fibers such as cotton fiber, regenerated fibers such as rayon fiber, and the like can be used. In addition, as the material of the above-mentioned fabric, a plurality of the above-described fibers can be used.
Further, it is preferable that the waist portion protecting portion is provided with bones for stabilizing a position of a spinal column. Here, the material of the bone is preferably a metal, a resin or the like which has a relatively high bending stress. Examples of the shape include a spiral shape and a strip shape.
In addition, the waist portion protecting portion may be provided with a slip prevention member (not shown).
When in a state in which the protection band for lumbago is attached to the bottom wear of the present invention, the first fixing member and the second fixing member of the protection band for lumbago are joined together in front of the wearer, the pressure on the waist portion of the wearer can be increased. It is preferable that at least one of the first fixing member and the second fixing member is long in the longitudinal direction of the protection band for lumbago because the adjustable range of the pressure on the waist portion of the wearer can be expanded. Further, for the purpose of expanding the adjustable range of the pressure on the waist of the wearer, an auxiliary belt composed of band-shaped flat rubber or the like may be provided.
Here, it is preferable to use a hook-and-loop fastener as a material for the first fixing member and the second fixing member of the protection band for lumbago so that the first fixing member and the second fixing member are mutually locked. In this case, the type of hook-and-loop fastener is not particularly limited, but when considering that pilling occurs in the cloth of bottom wear due to damage to the cloth of bottom wear, it is preferable to use a hook-and-loop fastener of mushroom type in which the tip portion of a protrusion portion of a male surface is rounded.
Further, when the male surface and the female surface of the hook-and-loop fastener used for the protection band for lumbago are locked, the shear strength is preferably 4.0 N/cm2 or more, more preferably 8.0 N/cm2 or more for preventing detachment of the locking portion of the protection band for lumbago at the time of wearing the protection band for lumbago. On the other hand, the shear strength is preferably 12.0 N/cm2 or less for maintaining comfort at the time of taking on or taking off the protection band for lumbago. When a hook-and-loop fastener having a shearing strength in the above-mentioned range is used for the protection band for lumbago, the force with which the two overlapping end portions attract each other is moderate, so that further excellent waist portion wearability is exhibited.
See
In addition, the planar material forming the cylindrical part front portion 6 in
Here, the material of the planar material is not particularly limited, but a fabric is preferable because it is excellent in versatility. In particular, a woven fabric or a knitted fabric is more preferable. Examples of the fiber used for the fabric may include synthetic fibers and natural fibers, and a plurality of fibers may be used. When considering washing resistance and versatility of original yarn/weaving and knitting design, it is preferable that synthetic fiber such as polyester fiber or nylon fiber is used alone, or synthetic fiber such as polyester fiber or nylon fiber and at least one selected from the group consisting of polyurethane fiber, rayon fiber, acrylic fiber and cotton fiber are used in combination.
As described above, the planar material of the cylindrical part front portion (symbol 6 in
(I) Woven fabrics composed of fiber obtained by mixing elastic fiber (such as polyurethane fiber) with natural fiber such as silk or wool fiber, regenerated fiber such as rayon fiber, synthetic fiber such as acrylic fiber or polyester fibers, or the like.
(II) Knitted fabrics composed of fiber obtained by mixing elastic fiber (such as polyurethane fiber) with natural fiber such as silk or wool fiber, regenerated fiber such as rayon fiber, synthetic fiber such as acrylic fiber or polyester fibers, or the like.
(III) Woven fabrics in which elastic fiber is not used, but multifilaments of composite fiber obtained by bonding two polyester resins, one of which is a polyester resin mainly composed of polytrimethylene terephthalate (PTT) and the other of which is a polyester resin mainly composed of polyethylene terephthalate, side by side along the fiber length are used as at least one of a warp yarn and a weft yarn.
(IV) Knitted fabrics in which elastic fiber is not used, but multifilaments of composite fiber obtained by bonding two polyester resins, one of which is a polyester resin mainly composed of polytrimethylene terephthalate (PTT) and the other of which is a polyester resin mainly composed of polyethylene terephthalate, side by side along the fiber length are used.
(V) Power net.
Here, the power net refers to a fine net-like cloth produced from nylon fiber or the like and elastic fiber (e.g. polyurethane fiber). The power net may be a relatively thin cloth having an areal weight of about 100 g/m2, and the cylindrical body front portion 6 (i.e. planar material) is preferably a power net because it is excellent in elongation and kickback performance, and capable of making the cylindrical part compact while securing the function of the cylindrical part provided on the back portion of the bottom wear.
As described above, the static friction coefficient of the inner surface 22 of the cylindrical part rear portion (the bottom wear cloth 5 on the back portion in the waist-encircling section in
The cloth of bottom wear is formed into a woven fabric or a knitted fabric, and it is possible to adjust the static friction coefficient according to the irregular state of the surface of this cloth and the kind of yarn forming the cloth. For the woven fabric, the static friction coefficient is small in the case of a plain weave having a small number of irregularities on the surface, and conversely, the static friction coefficient is large in the case of a twill weave in which oblique ridges appear on the woven fabric surface, and a satin weave in which oblique ridges do not appear, but tissue points are arranged at regular intervals. In addition, the static friction coefficient is generally increased by providing a pile on the surface of the cloth or raising the surface. For the knitted fabric, weft knitting or warp knitting may be performed, and the static friction coefficient can be adjusted according to the density of the knitted fabric. However, warp knitting is preferable because even when the stitch is cut, a run hardly occurs, resulting in enhancement of durability. The static friction coefficient can also be adjusted according to the shape of the yarn to be used for the woven or knitted fabric. For example, since the irregularities on the fiber surface of a filament yarn is smaller as compared to a spun yarn, the static friction coefficient of a cloth using the filament yarn can be reduced. In addition, the static friction coefficient can also be adjusted according to the material of the yarn. For example, polytetrafluoroethylene fiber (PTFE fiber) itself has a low static friction coefficient, and conversely, rubber or a polyurethane yarn itself has a high static friction coefficient. By using such a yarn for a part or the whole of the cloth, the static friction coefficient as a cloth can be adjusted. Further, the static friction coefficients of the surface and the back surface of the cloth can be set to different values. When on one surface of a double-side knitted structure (tricot), a knit loop is formed with only an elastic yarn to form a warp knitted fabric, and on the other surface, a knit loop is formed by use of an elastic yarn and an inelastic yarn in combination to form a warp knitted fabric, a high friction coefficient is developed for the surface on which the knit loop is formed with only an elastic yarn.
In addition, the static friction coefficient of an outer surface 23 of the cylindrical part front portion (i.e. a surface of the cylindrical part, which is close to the human body) is preferably 0.2 to 1.0. In addition, as a method for adjusting the static friction coefficient, the static friction coefficient is adjusted according to irregularities on the surface of the woven or knitted structure, and the shape and type of a yarn as in the method for adjusting the static friction coefficient of the inner surface of the bottom wear cloth 5 on the back portion in the waist-encircling section.
Since the static friction coefficient of the outer surface of the cylindrical part front portion is 0.2 to 1.0, the present invention more remarkably exhibits an effect of suppressing a situation in which an underwear worn by a wearer is slid in a wearer's stature direction with respect to a waist portion of the wearer as the wearer makes a motion.
Subsequently, a bottom wear having a cylindrical part according to the second embodiment will be described below.
The cylindrical part according to the second embodiment includes a planar material different from a cloth of bottom wear.
See
In the bottom wear of the second embodiment, the static friction coefficient of the inner surface (surface denoted by symbol 22 in
In the second embodiment, the material of the planar material forming the cylindrical part is not particularly limited, but is preferably a fabric. As materials having a static friction coefficient as described above and a stress at elongation as described above, those described in the first embodiment can be used. Examples of the method for forming the cylindrical part include a method in which a fabric is folded, and the upper parts are connected; a method in which two or more fabrics are stitched together; and a method in which a circular knitted fabric is used as such to form a cylindrical shape. The material may be used as such to form the cylindrical part.
The cylindrical part formed by the cylindrical part front portion 15 and rear portion 15′ is continuously or intermittently connected to the bottom wear cloth 5 at the upper end by the locking portion 16 in the waist-encircling direction. Preferably, the upper end of the cylindrical material is connected to the waist-encircling section because it is possible to suppress a situation in which the toe or the like of a wearer is caught between the cylindrical material and the bottom wear cloth 5 at the time of wearing the bottom wear of the present invention.
It is to be noted that the present invention is not limited to the configuration shown in
In addition, in
The lower end portion of the cylindrical part can be fixed so as to extend along the inner surface of the cloth of bottom wear. As a result, a waist portion band is neatly inserted into the cylindrical part. In addition, it is possible to suppress uncontrollable movement of the lower end portion of the cylindrical part inside the bottom wear. It is possible to suppress bending of the cylindrical part inside the bottom wear, and therefore a wearer can smoothly insert a protection band for lumbago into the cylindrical part while wearing the bottom wear.
The present invention is not limited to the configuration shown in
In the bottom wear configured to have a cross-section as in
Here, examples of the intermittent or continuous locking portion include the means described in the first embodiment.
In addition, in the second embodiment as well as the first embodiment, the static friction coefficient of the outer surface of the cylindrical part front portion (i.e. a surface of the cylindrical part, which is close to the human body) is preferably 0.2 to 1.0. That is, in this embodiment, the static friction coefficient of a surface of the planar material forming the front portion of the cylindrical part, which is close to the human body, is preferably 0.2 or more and 1.0 or less. Here, the surface of the planar material forming the cylindrical part, which is close to the human body, is a surface of the cylindrical part front portion 15, which may be in contact with the body of the wearer or an underwear worn by the wearer, at the time of wearing the bottom wear shown in
The effect of the bottom wear of the second embodiment as well as the bottom wear of the first embodiment in which the static friction coefficient and the stress at elongation are each a specific range will be described. The static friction coefficient of the inner surface of the cylindrical part rear portion of the waist-encircling section provided in the bottom wear is 0.2 to 1.0, and the stress of the cylindrical part front portion at 10% elongation is 10 N/25 mm or less. Since the bottom wear of the present invention has the above-mentioned characteristics, occurrence of a phenomenon is suppressed in which the underwear of the wearer is pulled upward as the wearer makes a motion such as bending and stretching. A supposed mechanism in which the above-described effect is exhibited may be as follows.
That is, when the wearer wears an underwear with a protection band for lumbago, and the wearer's waist portion is tightened with the protection band for lumbago, the protection band for lumbago firmly adheres to the waist portion of the wearer while the underwear worn by the wearer is interposed between the protection band for lumbago and the waist portion. In this state, the static friction coefficient of the inner surface of the cylindrical part rear portion of the waist-encircling section provided in the bottom wear of the present invention is as small as 0.2 or more and 1.0 or less, and therefore the protection band for lumbago moves upward while being moderately slid upward in the cylindrical part in conformity to upward movement of the waist-encircling section of the bottom wear with a motion of the wearer such as bending and, stretching. The cylindrical part front portion moderately extends upward, and the protection band for lumbago conforms to the motion while maintaining an appropriate position, e.g. a position fit to the pelvis. When the wearer then returns from the stretching state to the standing posture, the belt moves to an original position while being moderately slid downward in the cylindrical part, and the cylindrical part front portion is shrunk to return to an original size. When the human body bends, the abdominal circumference becomes larger, leading to an increase in pressure on the protection band for lumbago. The point is the movement of the protection band for lumbago when the wearer returns from the bending state to the standing posture. When the human body returns from the bending state to the standing posture, the abdominal circumference becomes smaller from the large state. At that time, the human body is getting thinner as going from the waist portion to the waistline. When a bottom wear having no cylindrical part is worn after a protection band for lumbago is attached, the protection band for lumbago rises toward the waistline, and remains as it is.
However, when the protection band for lumbago extends through the cylindrical part of the bottom wear, and the static friction coefficient and stress of each portion of the cylindrical part is within the above-described range, the waist-encircling section of the bottom wear returns to an original position. In addition, the protection band for lumbago acts to return to the original position while being moderately pulled in the direction I and slid in the cylindrical part, the protection band for lumbago hardly rises and remains as it is.
In the second embodiment as well as the first embodiment, the static friction coefficient of the inner surface of the cylindrical part rear portion provided in the bottom wear of the present invention is 0.2 to 1.0 as described above. Since the static friction coefficient of the inner surface of the cylindrical part rear portion is 1.0 or less, it is possible to suppress a situation in which the protection band for lumbago moves in conformity to the movement of the waist-encircling section of the bottom wear. On the other hand, since the static friction coefficient of the inner surface of the cylindrical part rear portion is 0.2 or more, the following effect is exhibited. That is, it is possible to suppress a situation in which the protection band for lumbago excessively moves excessively independently of the waist-encircling section of the bottom wear, and the position of the protection band for lumbago is deviated from a position suitable for protection of the waist portion. The static friction coefficient is preferably 0.3 or more, more preferably 0.4 or more because the above-described effect can be further improved. In addition, the static friction coefficient is more preferably 0.8 or less, still more preferably 0.6 or less because the above-described effect can be further improved.
The static friction coefficient of a surface of a portion of the cylindrical part front portion, which is far from the human body (i.e. a surface of the cylindrical part front portion) on a side opposite to a surface on the wearer side) has substantially no influence on the effect of the present invention: i.e. suppressing a situation in which the underwear worn by the wearer is slid in the wearer's stature direction with respect to the waist portion of the wearer. The mechanism thereof may be as follows. That is, in order to obtain the effect of the present invention, it is necessary that the waist portion protecting portion of the protection band for lumbago and the cylindrical part rear portion be easily slid relatively in the wearer's stature direction as the wearer makes a bending-and-stretching motion. Here, when the wearer wears the bottom wear of the present invention and the protection band for lumbago, the cylindrical part front portion is pressed against the waist portion of the wearer by the waist portion protecting portion of the protection band for lumbago. Thus, even if the static friction coefficient of the surface of the cylindrical part front portion, which is far from the human body, and the waist portion protecting portion is low, the waist portion protecting portion of the protection band for lumbago is hardly slid with respect to the cylindrical part front portion because the cylindrical part front portion is pressed against the waist portion of the wearer by the waist portion protecting portion of the protection band for lumbago. Therefore, it is considered that the waist portion protecting portion of the protection band for lumbago firmly adheres to the waist portion of the wearer, and as a result, the waist portion protecting portion of the protection band for lumbago and the cylindrical part rear portion is easily slid relatively in the wearer's stature direction as the wearer makes a bending-and-stretching motion. When the static friction coefficient of the surface of the cylindrical part front portion, which is far from the human body, and the waist portion protecting portion is high, the waist portion protecting portion of the protection band for lumbago more firmly adheres to the waist portion of the wearer, and therefore in this case, the waist portion protecting portion of the protection band for lumbago and the cylindrical part rear portion is easily slid relatively in the wearer's stature direction as the wearer makes a bending-and-stretching motion.
In addition, in the second embodiment as well as the first embodiment, the static friction coefficient of a surface of the cylindrical part front portion, which is close to the human body, i.e. a surface of the cylindrical part front portion on the wearer side, in the bottom wear of the present invention, is preferably 0.2 to 1.0. The underwear worn by the wearer at this surface is in contact with the cylindrical part front portion, but since the static friction coefficient is 1.0 or less, it possible to suppress a situation in which the bottom wear conforms to the movement of the underwear. On the other hand, when the positional relationship between the underwear and the bottom wear excessively smoothly moves, the wearer may feel uncomfortable. Therefore, the static friction coefficient of this surface is preferably 0.2 or more. The static friction coefficient is more preferably 0.3 or more, still more preferably 0.4 or more because the above-mentioned effect can be further improved. In addition, the static friction coefficient is more preferably 0.8 or less, still more preferably 0.6 or less because the above-described effect can be further improved.
In the second embodiment as well as the first embodiment, the stress of the cylindrical part front portion is 10 N/25 mm or less at 10% elongation in the direction I in the bottom wear of the present invention. Since the stress of the cylindrical part front portion is 10 N/25 mm or less at 10% elongation in the direction I, it is possible to extremely effectively suppress a situation in which the underwear worn by the wearer moves in conformity to the waist-encircling section of the bottom wear as described above. The stress of the cylindrical part front portion is preferably 1 N/25 mm or less at 10% elongation in the direction I because the above-described effect is extremely remarkably exhibited. Here, the direction I of the cylindrical part refers to a direction parallel to the wearer's stature direction or the upper part of the waist-encircling section of the bottom wear. In addition, the lower limit of the stress of the cylindrical part front portion at 10% elongation in the direction I is not particularly limited, but when the cylindrical part front portion is excessively extended, the portion does not completely return to an original length, and strain is apt to remain, so that creases or a feeling of stiffness around the waist may occur. From the viewpoint of the recovery rate from such a condition, the stress of the cylindrical part front portion is preferably 0.2 N/25 mm or more.
In the bottom wear of the first embodiment, the cloth of bottom wear is a cylindrical part rear portion. Preferably, the planar material of the front portion forming the cylindrical part is continuously or intermittently connected to the cloth of bottom wear at the upper part. This connection is established preferably at the upper end in the transverse direction of the cylindrical part, or in the vicinity thereof. The upper part of the planar material means a portion including the upper end of the planar material and a portion situated below the upper end of the planar material. It is desirable that the planar material of the cylindrical part front portion be continuously or intermittently connected to the cloth of bottom wear at the lower part. This connection is established preferably at the lower end in the transverse direction of the cylindrical part, or in the vicinity thereof. The lower part of the planar material means a portion including the lower end of the planar material and a portion situated above the lower end of the planar material. When the cloth of bottom wear is used for about a half of the cylindrical part, it is possible to form a compact cylindrical part as compared to the bottom wear of the second embodiment.
On the other hand, in the bottom wear of the second embodiment, a planar material other than the cloth of bottom wear is used. Preferably, the planar material is continuously or intermittently connected to the cloth of bottom wear at the upper part of the cylindrical part. This connection is established preferably at the upper end in the transverse direction of the cylindrical part, or in the vicinity thereof. The upper part of the planar material means a portion including the upper end of the planar material and a portion situated below the upper end of the planar material. Further, it is desirable that the planar material be continuously or intermittently connected to the back portion of the waist-encircling section in the waist-encircling direction at the lower part of the cylindrical part. This connection is established preferably at the lower end in the transverse direction of the cylindrical part, or in the vicinity thereof. The lower part of the planar material means a portion including the lower end of the planar material and a portion situated above the lower end of the planar material. In this way, the cylindrical part is suspended at the upper part of the cylindrical part, and the lower part of the cylindrical part is partially connected, so that at the time when the protection band for lumbago is inserted into the bottom wear, the silhouette of the appearance from behind is clearly seen.
Hereinafter, the present invention will be described in further detail by way of examples.
The static friction coefficient of a fabric sample was measured in accordance with Inclination Method in JIS P 8147: 1994 3.2. Three test pieces each having a width of 25 mm and a length of 130 mm were prepared. Next, one of the three test pieces was attached to a weight of 872 g in a slip inclination angle measuring apparatus. On the other hand, a friction target having a width of 120 mm and a length of 200 mm was attached to the slip inclination angle measuring apparatus, and the weight with the test piece was placed in such a manner that the measurement surface of the test piece was in contact with the friction target, and the lengthwise direction of the test piece was coincide with the sliding direction of the slip inclination angle measuring apparatus. The degree of inclination was increased under the condition of an inclination angle of 3°/second, the inclination angle at the time when the weight fell down was read, and the tangent (tan θ) of the inclination angle was defined as a static friction coefficient. For the other two test pieces, the static friction coefficient was measured in the same manner as described above, and an average of the measured values of the static friction coefficients of the three test pieces was defined as a static friction coefficient of the fabric sample. Here, the test piece is sampled in such a manner that the lengthwise direction of the test piece is identical to the direction I of the cylindrical part front portion. In addition, as the friction target, standard cotton (No. 3-1: manufactured by Japanese Standards Association) is used, and the direction of the fabric of this standard cotton may be a warp direction or weft direction.
The stress at 10% elongation of the fabric sample was measured using Autograph AG-50kNG manufactured by Shimadzu Corporation. Specifically, five test pieces each having a width of 25 mm and a length of 220 mm were prepared. Next, one of the five test pieces was attached to the above-described measuring equipment at a chuck distance of 100 mm, and pulled at a tensile speed of 300 mm/min until the test piece was broken. The other four test pieces were subjected to the same treatment as described above, and the stress of each of the five test pieces at 10% elongation was measured. The “stress at 10% elongation” mentioned here is an average of the elongation stresses of the five fabrics at an elongation of 10% as measured by the above-described method. Here, the test piece is sampled in such a manner that the lengthwise direction of the test piece is identical to the direction I of the cylindrical part front portion.
The maximum shear strength of the protection band for lumbago at the time of fastening a hook-and-loop fastener was measured in accordance with JIS 3416 using Autograph AG-50kNG manufactured by Shimadzu Corporation. Specifically, five test pieces obtained by cutting both ends of the protection band for lumbago to a length of 150 mm, one of five test pieces for each of a male surface and a female surface were then bonded in such a manner that the test piece overlapped only at a portion where the male surface of the hook-and-loop fastener was placed at the end, and the test piece was attached to the above-described measuring equipment at a chuck distance of 110 mm, and pulled at a tensile speed of 300 mm/min until the fasetened surfaces of the test piece were separated. The other four test pieces were subjected to the same treatment as described above, and the maximum strength was measured for each of the five test pieces, and divided by the value of the fastening area to calculate a maximum strength per area. The “shear strength” mentioned here is an average of the values of the maximum intensity per area of five pieces measured by the above-described method.
Twenty subjects wore bottom wears of the examples and the comparative examples over the underwear. The protection band for lumbago was inserted into the bottom wear, and then adjusted so that each subject felt a moderate abdominal pressure at the waist portion (pelvic position). Thereafter, the wearer repeatedly made a standing posture and a crouching posture ten times, and grade evaluation was performed for ease of displacement of the protection band for lumbago in the questionnaire on the basis of the following criteria.
1: considerably displaced
2: displaced
3: not so much noticeably displaced
4: hardly displaced
5: not displaced at all
Tables 1 to 3 show the number of subjects who gave any of evaluation points 3 to 5 among 20 subjects. When the number of such subjects is 10 or more, the sample may be rated as having a rising suppression property.
A flat abrasion tester manufactured by DAIEI KAGAKU SEIKI MFG. co., ltd. was used. Two fabrics to be used for the cloth of bottom wear were samples with a width of 40 mm and a length of 250 mm in the longitudinal direction and the transverse direction under a load of 200 g, and flat abrasion treatment was performed (30 times) with the obtained sample and a hook-and-loop (male) to be used for the locking portion of the protection band for lumbago. For each of the samples after the above-described flat abrasion treatment, grade visual evaluation was performed on the basis of the following criteria in accordance with the visual evaluation method in a pilling test as specified in JIS L1076 (2012).
1: dense surface fluffing and/or gross considerable pilling
2: evident surface fluffing and/or evident pilling
3: moderate surface fluffing and/or moderate pilling
4: slight surface fluffing and/or partially formed pill
5: no change).
Here, when the grade was intermediate between two grades, an intermediate grade was given. For example, when “dense surface luffing” (corresponding to evaluation point 1) and “evident fluffing” (corresponding to evaluation point 2) are observed, a grade 1-2 is given. In addition, the “pilling property” refers to one with the lowest numerical value among the grade evaluation results for two samples in the longitudinal and lateral directions.
Polyethylene terephthalate yarns of 167 dtex and spun yarns with 65% of polyester and 35% of cotton were used as warp threads, and polyethylene terephthalate yarns of 167 dtex were used as weft threads to weave a warp double twill fabric at a warp density of 154 threads/2.54 cm and a weft density of 64 threads/2.54 cm, thereby obtaining a cloth A for cloth of bottom wear with 90% of polyester and 10% of cotton.
Subsequently, nylon yarns of 78 dtex and polyurethane elastic fiber of 310 dtex were used to knit a fabric, thereby obtaining a power net cloth with 82% of nylon and 18% of polyurethane (hereinafter, the power net cloth is referred to as a “cloth D”).
The cloth A for cloth of bottom wear bottom was used as a cloth of bottom wear to prepare a bottom wear having an appearance as shown in
Nylon yarns of 44 dtex and polyurethane elastic fiber of 44 dtex were used to knit a tricot, thereby obtaining a tricot cloth with 70% of nylon and 30% of polyurethane (hereinafter, the tricot cloth is referred to as a “cloth E”). The same cloth A as used for the bottom wear in Example 1, and the cloth E were used to prepare a bottom wear having an appearance as shown in
PTFE fiber of 3.3 dtex was used as warp threads to prepare a twill fabric with 100% of PTFE (areal weight: 522 g/m2), and the fabric was defined as a cloth B for cloth of bottom wear. The cloth B was used as the bottom wear cloth on the back portion in the waist-encircling section of the cloth of bottom wear, and the cloth A was used for other portions of the cloth of bottom wear to prepare a cloth of bottom wear. Further, the same cloth A as used in Example 1 was used to prepare a bottom wear having an appearance as shown in
PPT composite fiber of 84 dtex and spun yarns with 100% of cotton were used to knit a tricot at 28 G, thereby obtaining a tricot cloth (hereinafter, the tricot cloth is referred to as a “cloth F”). A cloth of bottom wear was prepared in the same manner as in Example 1 using the same cloth A as used in Example 1, and further, the cloth F was used to prepare a bottom wear having an appearance as shown in
A knit cloth with 100% of cotton, which was subjected to silicon dot processing with a diameter of 1 mm at intervals of 1 mm (the static friction coefficient of a surface subjected to silicon dot processing is 0.91) was defined as a cloth C. The cloth C was used as the bottom wear cloth on the back portion in the waist-encircling section of the cloth of bottom wear, and the cloth A was used for other portions of the cloth of bottom wear to prepare a cloth of bottom wear. Further, the same cloth D as used in Example 1 was used to prepare a bottom wear having an appearance as shown in
A cloth of bottom wear was prepared using the same cloth A as used in Example 1, and further, the same cloth D as used in Example 1 was used to prepare a cylindrical part, thereby preparing a bottom wear having an appearance as shown in
In a 30 gauge double tricot knitting machine, polyurethane elastic yarns of 33 decitex were prepared for a front reed, a nylon original yarns of 22 dtex/7 filaments were prepared for a back reed, and a warp knitted fabric having knitted structures at both sides and an elastic yarn content of 53% was knitted in the following structure.
Front reed: 1-0/1-2/2-3/2-1//
Back reed: 2-3/1-1/1-0/2-2//
Next, the obtained warp knitted fabric was scoured. In this way, a tricot cloth having different static friction coefficients on the front and the back (hereinafter, this tricot cloth is referred to as a cloth G). In the tricot cloth, a knit loop was formed with only an elastic yarn to form a warp knitted fabric on one surface of the double knitted structure, a knit loop was formed by use of an elastic yarn and an inelastic yarn in combination to form a warp knitted fabric on the other surface, and the surface and the back surface had static friction coefficients of 0.60 and 0.39, respectively.
A cloth of bottom wear was prepared using the same cloth A as used in Example 1, and further, the cloth G was used to prepare a bottom wear having an appearance as shown in
A cloth of bottom wear was prepared using the same cloth A as used in Example 1, and further, a cylindrical part was prepared in the same manner as in Example 7 using the same cloth G as used for the bottom wear in Example 7. However, the cloth is reversed in the front and the back, and in accordance with the characteristics of the cloth, a surface of the cloth C, which has a static friction coefficient of 0.60, is disposed on the inner surface of the cylindrical part rear portion, and a surface of the cloth G, which has a static friction coefficient of 0.39, is disposed on the outer surface of the cylindrical part front portion. The protection band for lumbago 1 shown in
A cloth of bottom wear was prepared using the same cloth A as used in Example 1, and further, the cloth D used in Example 1 was used to prepare a cylindrical part in the same manner as in Example 7, thereby preparing a bottom wear having an appearance as shown in
A cloth of bottom wear was prepared using the same cloth A as used in Example 1, and further, the cloth D used in Example 1 was used to prepare a cylindrical part in the same manner as in Example 7, thereby preparing a bottom wear having an appearance as shown in
The same cloth A as used in Example 1 was used to prepare a bottom wear according to the prior art, which had no cylindrical part. The wearer was made to wear the protection band for lumbago 1 with the configuration shown in
A cloth of bottom wear was prepared using the same cloth A as used in Example 1, and further, the cloth A was used as the planar material of the cylindrical part front portion to prepare a bottom wear having an appearance as shown in
Three anti-slipping tapes having a length of 14 cm and a width of 25 mm and having two high friction bands continuously disposed from one end portion to the other end portion in the longitudinal direction (800 A manufactured by Ando Tape Co., Ltd.; surface to which a large number of elastic yarns are exposed, has a static friction coefficient of 1.07) were prepared. To the back portion of the waist-encircling section of the same cloth of bottom wear as used in Example 1, these anti-slipping tapes were stitched and bonded at total three positions: the central part of the back portion of the waist-encircling section and portions at a distance of 8 cm on the left and the right from the central part. The longitudinal direction of the anti-slipping tape was made substantially parallel to the vertical direction. This cloth of bottom wear and the same cloth D as used in Example 1 were used to prepare a bottom wear having an appearance as shown in
A cloth of bottom wear was prepared using the cloth A used in Example 1, and the same cloth D as used in Example 1 was used as a planar material of a cylindrical part front portion. In addition, on the surface of a portion (cloth D) of the cylindrical part front portion, which was close to the human body, the anti-slipping tape used in Comparative Example 3 was stitched and bonded at total three positions: the central part of the cloth D (planar material) and portions at a distance of 8 cm on the left and the right from the central part, in such a manner that the longitudinal direction of the anti-slipping tape was substantially parallel to the direction I. Here, a bottom wear having an appearance as shown in
| Number | Date | Country | Kind |
|---|---|---|---|
| 2016-195517 | Oct 2016 | JP | national |
This is the U.S. National Phase application of PCT/JP2017/035807, filed Oct. 2, 2017, which claims priority to Japanese Patent Application No. JP2016-195517, filed Oct. 3, 2016, the disclosures of these applications being incorporated herein by reference in their entireties for all purposes.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2017/035807 | 10/2/2017 | WO | 00 |
