Lower clothing

Abstract

To provide a lower garment such as work trousers suitable for use with a lumbar protection belt that tightens the wearer's waist, which has a cylindrical part on the back of the waist area and on the inside of the lower garment, and which can be attached integrally with the lumbar protection belt, and which does not require much time for the wearer to completely fasten the lumbar protection belt on the cylindrical part. The means for solving the problem is a lower garment having a waist circumference, and a tubular section on the back side of the waist circumference and inside the lower garment, which is made up of a lower garment body fabric and a sheet-like object different from the fabric, or made up of a sheet-like object different from the lower garment body fabric, The tubular portion is arranged so that its axial direction is approximately parallel to the waist circumference of the waist area, and has one slit approximately in the center of the front part of the tubular portion, and the slit is arranged so that its longitudinal direction is approximately parallel to the height direction of the wearer, and the ratio (W2 / W1) of the width (W1) of the tubular portion to the longitudinal width (W2) of the slit is 0.70 to 1.00. [Selection diagram] Figure 6

Description

Technical Field

[0001] The present invention relates to bottom wear.

Background Art

[0002] Among occupational diseases, low back pain is one of the diseases that workers are likely to develop during work, and it is spreading and occurring in various occupations. Workers at high risk of developing low back pain include transportation industry operators engaged in heavy object handling and long-distance driving, and medical workers who need to assist inpatients and respond to emergency patients. Recently, however, the number of cases of low back pain among workers in social welfare facilities such as elderly care has increased significantly.

[0003] Such low back pain tends to increase as workers get older, but there are few people who take measures especially in the early stage, and there are not a few people who do nothing until the symptoms of low back pain progress. In addition, the declining birthrate and aging population are progressing mainly in developed countries, and we are facing the problem of a decrease in the working-age population. Also, in terms of supporting society, the number of working seniors and working women aged 65 and over is increasing. Under these circumstances, maintaining and promoting the health of precious workers has become even more important than ever. In occupational clothing as well, in addition to the conventional functions of safety, ease of movement, and identifiability, the perspective of more actively protecting the health of workers has become important.

[0004] Conventionally, for preventing low back pain, it has been effective to tighten a lumbar protection belt around the wearer's waist, particularly at a position including the upper part of the wearer's pelvis, and increase abdominal pressure. This is because the abdominal cavity acts as a pillar like a rugby ball to reduce the burden on the waist. However, most of these lumbar protection belts are worn under clothes and are troublesome because they must be attached to the body after taking off the clothes. Also, when adjusting the tightness of the waist after attaching the lumbar protection belt to the body, this operation is troublesome because the clothes must be taken off or loosened before adjusting the tightness.

[0005] Therefore, there is known an undergarment having a cylindrical portion on the back surface of the waist circumference portion and inside the undergarment, such as work pants, to which a waist protection belt can be integrally attached (see Patent Document 1). In this undergarment, even when a wearer whose waist is tightened by a waist protection belt repeatedly performs a stretching and contracting motion of changing from an upright posture to a squatting posture or from a squatting posture to an upright posture a plurality of times, the underwear worn by the wearer slides in the longitudinal direction of the wearer's body with respect to the waist of the wearer along with the slide of the waist protection belt in the longitudinal direction of the wearer's body with respect to the waist of the wearer, and it is configured to be able to suppress this, and it solves the problem that the wearer feels uncomfortable with the repeated change of the posture as described above.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] However, according to the inventors' findings, in the undergarment disclosed in Patent Document 1 that can be integrally provided with a waist protector, when attaching a waist protection belt (hereinafter sometimes simply referred to as a "belt") to the cylindrical part, the structure is such that the waist protection belt is inserted through an opening arranged at one end of the two ends of the cylindrical part. This waist protection belt insertion operation has the problem that troubles such as the end of the waist protection belt getting caught on the inner side surface of the cylindrical part during the process, resulting in the waist protection belt getting clogged inside the cylindrical part, and it tends to be a time-consuming and laborious operation. Furthermore, workers in the transportation industry, medical workers, and workers in social welfare facilities such as elderly care, who are occupational workers with a high risk of developing low back pain as described above, often perform this waist protection belt insertion operation in a limited changing space. Also, since multiple people often change clothes at the same time, it is difficult to secure sufficient space for one person, and they try to quickly finish changing clothes in order to create space for others to change. Therefore, in the method of inserting the belt through an opening arranged at one end of the two ends of the cylindrical part (that is, the method of inserting one end of the belt through one opening of the cylindrical part and inserting it through to the other opening of the cylindrical part to attach the belt), there is a possibility that the belt gets clogged in the middle of the cylindrical part or the belt gets folded inside the cylindrical part. And in that case, the operator needs to put a hand inside the cylindrical part through the other opening of the cylindrical part to pull out the belt. However, even when pulling out the belt by putting a hand through the other opening of the cylindrical part in this way, if the distance for inserting the belt (hereinafter sometimes referred to as the "belt insertion distance"), such as from one opening of the cylindrical part to the other opening, is long, it is also difficult to put a hand to the clogged part of the belt. Due to the above-mentioned inconveniences, in the undergarment disclosed in Patent Document 1 that has to adopt the method of inserting the belt through an opening arranged at one end of the two ends of the cylindrical part, there is a problem that it takes time for the wearer to complete attaching the waist protection belt to the cylindrical part.

Means for Solving the Problems

[0008] In order to solve the above problems, the present invention discloses the following configurations and more preferable aspects. 1. An undergarment having a waist circumference portion, wherein a cylindrical portion composed of an undergarment body fabric and a surface material different from the fabric or composed of a surface material different from the undergarment body fabric is provided on the back portion of the waist circumference portion and inside the undergarment. The cylindrical portion is arranged such that its axial direction is parallel to the waist circumference direction of the waist circumference portion. The cylindrical portion has only one slit that satisfies the following conditions (1) and (2). The slit is provided at the front portion of the cylindrical portion and substantially at the center in the longitudinal direction of the cylindrical portion. An undergarment. (1) The slit is provided such that the longitudinal direction of the slit is substantially orthogonal to the waist circumference direction. (2) The ratio (W2 / W1) of the width (W1) of the cylindrical portion in the direction orthogonal to the waist circumference direction to the width (W2) in the longitudinal direction of the slit is 0.70 to 0.98 is. 2. The undergarment, wherein the static friction coefficient of the inner surface of the rear portion of the cylindrical portion is 0.2 to 1.0, and the stress at 10% elongation in the width direction of the cylindrical portion of the front portion of the cylindrical portion is 10 N / 25 mm or less. 3. Any of the above undergarments, wherein the static friction coefficient of the surface of the portion of the front portion of the cylindrical portion far from the human body is 0.2 to 1.0. 4. Any of the above undergarments, wherein the static friction coefficient of the surface of the portion of the front portion of the cylindrical portion close to the human body is 0.2 to 1.0. 5. The undergarment according to any one of 1 to 4 above, wherein the cylindrical portion is composed of an undergarment body fabric and a surface material different from the fabric, and the upper and lower portions of the surface material are continuously or intermittently connected to the undergarment body fabric, respectively. 6. The undergarment according to any one of 1 to 4 above, wherein the cylindrical portion is composed of a surface material different from the undergarment body fabric, and the upper and lower portions of the cylindrical portion are continuously or intermittently connected to the undergarment body fabric, respectively. 7. Any of the above undergarments, wherein the surface material is a fabric. 、 8 . The slit is an elliptical slit. The above 1 to 7any of the following garments, and, 9 . A garment with a belt, comprising the undergarment according to any one of the above and a waist protection belt. Here, the substantially central portion in the longitudinal direction of the tubular portion refers to a part of the tubular portion located in the middle when the tubular portion is divided into three equal parts in the longitudinal direction. Also, the longitudinal direction being substantially orthogonal to the waist circumference direction means that the acute angle formed by the longitudinal direction and the direction orthogonal to the waist circumference direction is 0 to 15 degrees.

Advantages of the Invention

[0009] An undergarment having a tubular portion on the back surface of the waist circumference portion and inside the undergarment, which can be integrally provided with a waist protection belt suitable for wearing a waist protection belt that tightens the waist of the wearer, and can quickly complete the operation of wearing the waist protection belt on the tubular portion by the wearer.

Brief Description of the Drawings

[0010]

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Embodiments for Carrying Out the Invention

[0011] The meanings of the terms used in the present invention are as follows.

[0012] Lower garment: Clothing worn on the lower body, such as trousers like slacks, jeans, chino pants, cargo pants, and semi-length pants, skirts, and one-piece suits.

[0013] Waist circumference part: A part of the lower garment that directly or indirectly contacts the body surface around the part of the wearer's body from the lower part of the spine to the pelvis when the lower garment is worn, which may be part or all of the lower garment. This waist circumference part may have one or more selected from the group consisting of belt loops, side pockets, back pockets, the waist part including front and back fasteners, and the upper thigh part of the trousers.

[0014] Back part: A part of the lower garment that directly or indirectly contacts the back of the wearer.

[0015] Tubular part: A tubular part in the waist circumference part and the back part of the lower garment. It is in the front part of the back part of the lower garment body. It does not necessarily have a circular cross-section, and it may have a hollow or potentially hollow cross-section, and may be crushed or folded into a substantially planar shape. The axial direction of the tubular part is also the length direction of the tubular part.

[0016] The tubular part in the first embodiment of the present invention: A tubular part composed of the lower garment body fabric and a planar material different from the fabric.

[0017] The tubular part in the second embodiment of the present invention: A tubular part composed of a planar material different from the lower garment body fabric.

[0018] The invention of the first embodiment: An invention having the tubular part of the first embodiment.

[0019] Invention of the second embodiment: An invention having a cylindrical portion of the second embodiment.

[0020] Rear portion of the cylindrical portion: The cylindrical portion can be divided into two parts by a line formed by the upper end and the lower end in the direction of the wearer's height of the cylindrical portion. Among them, the part farther from the wearer. In the first embodiment, in FIG. 3, "the lower garment body fabric 5 on the back at the waist circumference portion". In the second embodiment, in FIG. 9, "the rear portion 15' of the cylindrical portion". Hereinafter, it may be referred to as the "rear portion of the cylindrical portion".

[0021] Front portion of the cylindrical portion: The cylindrical portion can be divided into two parts by a line formed by the upper end and the lower end in the direction of the wearer's height of the cylindrical portion. Among them, the part closer to the wearer. In the first embodiment, in FIG. 3, "the front portion 6 of the cylindrical portion". In the second embodiment, in FIG. 9, "the front portion 15 of the cylindrical portion". Hereinafter, it may be referred to as the "front portion of the cylindrical portion". Front: The direction in front of the wearer in the lower garment (reference numeral 19 in FIG. 12). Rear: The direction behind the wearer in the lower garment (reference numeral 20 in FIG. 12).

[0022] Hereinafter, the present invention will be described with reference to the drawings, but the present invention is not limited only to the following disclosure.

[0023] First, the lower garment of the first embodiment will be described.

[0024] FIG. 1 is a front and top view showing a part of a lower garment as an example of the first embodiment, and FIG. 2 is a right side view of the lower garment shown in FIG. 1. The lower garment 1 of the present invention has a waist circumference portion 2 around it.

[0025] Further, the waist circumference portion 2 of the lower garment 1 of the first embodiment has a cylindrical portion 3 at its back portion 18. Further, this cylindrical portion 3 is arranged such that its axial direction is substantially parallel to the waist circumference direction 4 of the waist circumference portion.

[0026] Then, refer to FIG. 6. Inside this cylindrical portion 3, a waist protection belt 9 can be inserted into the cylindrical portion 3.

[0027] Next, FIG. 3 is a cross-sectional view taken along the line A-A' of the lower garment shown in FIG. 1. As shown in FIG. 3, the tubular portion 3 in FIG. 1 is composed of the lower garment fabric 5 at the waist circumference and located at the back and a planar material that constitutes the front portion 6 of the tubular portion. The planar material is disposed inside the lower garment. The lower garment fabric 5 forms the rear portion of the tubular portion as referred to in the present invention. Also, a planar material is used for the front portion 6 of the tubular portion. As a result, the tubular portion 3 is formed from the lower garment body fabric and a planar material different from the fabric.

[0028] And, the upper end of the front portion 6 of the tubular portion formed of the planar material is continuously or intermittently connected to the lower garment fabric 5 in the waist circumferential direction by the locking portion 7. The fact that the upper end of the planar material that constitutes the front portion 6 of the tubular portion is connected to the waist circumference as in the form of FIG. 3 is preferable because it can prevent the wearer's toes or the like from getting caught between the planar material and the lower garment fabric 5 when wearing the lower garment of the present embodiment.

[0029] However, it is not limited to the form shown in FIG. 3. A form in which a portion slightly below the upper end of the planar material (a portion located below the upper end of the planar material) is connected, that is, a form in which the upper end of the planar material protrudes above the locking portion may also be acceptable.

[0030] Also, in FIG. 3, the lower end of the planar material that constitutes the front portion 6 of the tubular portion is intermittently connected in the waist circumferential direction to the lower garment fabric 5 at the waist circumference and located at the back by the locking portion 8. The reason why it is preferable to connect at the lower end is as follows.

[0031] The lower end portion of the planar material can be fixed along the inner surface of the lower garment body fabric. As a result, when the waist protection belt is passed through the inside of the tubular portion, it fits well. Also, it is possible to prevent the lower end portion of the planar material from moving freely inside the lower garment. Since it is possible to prevent the planar material from bending inside the lower garment, the wearer can pass the waist protection belt through the tubular portion even while wearing the lower garment.

[0032] It is not limited to the form shown in FIG. 3. A portion slightly above the lower end of the planar object (a portion located above the lower end of the planar object) may be in a connected form, that is, a form in which the lower end of the fabric protrudes below the locking portion.

[0033] In the undergarment having a cross-section as shown in FIG. 3 in the present invention, the locking portions 7 and 8 are formed by sewing, and the upper and lower portions of the fabric (planar object) are intermittently connected to the undergarment fabric on the back at the waist circumference portion in the waist circumference direction, respectively. This connection does not necessarily have to be intermittent and may be continuous. This connection is preferably made at the upper and lower ends of the planar object that constitutes the cylindrical portion. Here, examples of the intermittent locking portion include those obtained by locking with sewing, adhesives, heat fusion, hook-and-loop fasteners, buttons, etc. On the other hand, examples of the continuous locking portion include those obtained by sewing or heat fusion. In addition to ordinary straight sewing, circular sewing such as flat seam sewing, double-needle sewing, and triple-needle sewing is more preferable from the viewpoint of making the touch on the human body smooth. Further, the form example of the intermittent locking portion is not limited to that provided in the undergarment of the present embodiment shown in FIG. 1. For example, it may be a locking portion provided with only one point at each of the lower ends of both ends of the cylindrical portion in the axial direction of the cylindrical portion.

[0034] Also, only one slit 25 is arranged at the center of the front portion 6 of the cylindrical portion shown in FIGS. 1 and 3, and this slit 25 is provided such that its longitudinal direction is substantially orthogonal to the waist circumference direction. If there is no such slit 25, it becomes a cylindrical portion as shown in FIG. 22. In the structure of the cylindrical portion shown in FIG. 22, when wearing the waist protection belt, the operator inserts one end of the belt through the opening arranged at one end of the cylindrical portion and inserts it toward the other opening of the cylindrical portion to wear the belt. In such a wearing method, the belt may get clogged in the middle of the cylindrical portion or the belt may be folded inside the cylindrical portion. And in that case, the operator needs to put his hand inside the cylindrical portion from the other opening of the cylindrical portion and pull out the belt. However, even when pulling out the belt by putting the hand inside the cylindrical portion from the other opening in this way, if the insertion distance of the belt is long, such as from one opening of the cylindrical portion to the other opening, it tends to be difficult to put the hand up to the clogged part of the belt. Because of the above-mentioned inconveniences, in the undergarment configured to adopt the method of inserting the belt from the opening arranged at one end of both ends of the cylindrical portion, there is a problem that it takes time for the wearer to complete the attachment of the waist protection belt to the cylindrical portion. However, by providing the above-mentioned slit 25, the waist protection belt can be easily attached to the undergarment according to the procedures shown in FIGS. 23, 24, and 25.

[0035] Specifically, first, insert one end of the waist protection belt, either left or right, from the center of the back into the cylindrical part (Fig. 24). Then, pass the other end of the waist protection belt to the side opposite to the tip of the cylindrical part (Fig. 25), making it possible to wear the waist protection belt and significantly shortening the time for the waist protection belt insertion operation. And as shown in Fig. 1, only one slit 25 is provided in the cylindrical part. The reason for limiting the number of slits 25 to one is as follows. The slit in the undergarment of the first embodiment is arranged for the purpose of simplifying the operation of inserting the waist protection belt through this slit and inserting the waist protection belt into the cylindrical part. Therefore, if the number of these slits is two or more (for example, two slits A and B), when passing the waist protection belt from slit A into the cylindrical part, the tip of the waist protection belt will get caught in slit B, making it difficult for the belt to enter smoothly from slit A. Instead, the effort increases, and the effect of installing the slit in the front part of the cylindrical part cannot be fully obtained. Furthermore, it can be said that the more the number of slits increases, the more effort is required as described above, and the effect of installing the slit in the front part of the cylindrical part becomes smaller. For the reasons described above, the number of slits installed in the front part of the cylindrical part is limited to one.

[0036] Also, in the present embodiment, the slit is provided at the front portion of the cylindrical portion and substantially at the center in the longitudinal direction of the cylindrical portion. Here, it is preferable that the slit is arranged only at the front portion of the cylindrical portion. By arranging the slit only at the front portion of the cylindrical portion, that is, by not having a slit at the rear portion of the cylindrical portion, it is possible to avoid the exposure of the waist protection belt from the appearance of the waist circumference when the waist protection belt is attached to the cylindrical portion. And in such underwear, when worn, since the snagging on protrusions or the like outside the underwear of the waist protection belt is suppressed, the wearer can work safely. The reason for setting the installation position of the slit at the front portion of the cylindrical portion and substantially at the center in the longitudinal direction of the cylindrical portion is as follows. As described above, the slit in the underwear of the first embodiment is arranged for the purpose of facilitating the operation of inserting the waist protection belt through this slit and inserting the waist protection belt into the cylindrical portion. Therefore, if this slit is installed at a location extremely close to either one of the two ends of the front portion of the cylindrical portion, the ease of operation will be almost the same as the case of inserting the waist protection belt from either one of the two ends of the conventional cylindrical portion, and the effect of installing the slit in the front portion of the cylindrical portion will be extremely reduced. For the above reasons, it is preferable that the slit 25 is arranged at the front portion of the cylindrical portion and at the central portion in the longitudinal direction of the cylindrical portion. However, as long as it does not significantly affect the workability of attaching the waist protection belt to the underwear, the position of the slit 25 in the cylindrical portion may be a position closer to one end side of the cylindrical portion from the central portion in the longitudinal direction of the cylindrical portion. The substantially central portion in the longitudinal direction of the cylindrical portion refers to a part of the cylindrical portion located in the middle when the cylindrical portion is divided into three equal parts in the longitudinal direction.

[0037] For the above reasons, only one slit is provided at substantially the center of the front portion of the cylindrical portion in the underwear of the first embodiment.

[0038] Furthermore, the cylindrical portion is provided with only one slit that satisfies the following conditions (1) and (2). (1) The slit is provided such that the longitudinal direction of the slit is substantially orthogonal to the waist circumference direction. (2) The ratio (W2 / W1) of the width (W1) of the cylindrical portion in the direction orthogonal to the waist circumference direction and the width (W2) of the slit in the longitudinal direction of the slit is 0.70 to 1.00.

[0039] The slit is provided such that the longitudinal direction of the slit is substantially orthogonal to the waist circumference direction. Note that the longitudinal direction being substantially orthogonal to the waist circumference direction means the case where the acute angle formed by the longitudinal direction and the direction orthogonal to the waist circumference direction is 0 to 15 degrees. By arranging the slit in this way, the insertion direction of the waist protection belt into the cylindrical portion becomes substantially parallel to the longitudinal direction of the cylindrical portion, and the wearing operation of the waist protection belt becomes simple. Here, there is no particular restriction on the shape of the slit. For example, a substantially elliptical slit as shown in FIGS. 1 and 24 can be mentioned. Also, this slit may be simply a cut in the center of the planar material in the front portion of the cylindrical portion, or may be sewn after the edge of the slit opening is sandwiched and bordered by the fabric. Among these forms, it is preferable that the slit is such that the edge of the slit opening is reinforced, such as being sewn after the edge of the slit opening is sandwiched and bordered by the fabric. In a slit in which the edge of the slit opening is reinforced, it is possible to suppress damage such as wear of the edge of the slit opening due to friction between the edge of the slit opening and the waist protection belt. It is particularly preferable that the entire circumference of the edge of the slit opening is reinforced. Furthermore, the fabric used for bordering the edge of the slit opening is preferably an elastic fabric in order to facilitate the insertion and removal of the waist protection belt, and examples of the material for obtaining this elastic fabric include the same materials as the material of the planar material in the front portion of the cylindrical portion described later.

[0040] Furthermore, as shown in FIG. 1, when the width of the cylindrical portion is W1 and the longitudinal width of the slit is W2, the ratio (W2 / W1) of W2 to W1 is 0.70 to 1.00. Here, on the premise that, from the viewpoint of making the retention of the waist protection belt by the undergarment excellent, it is more preferable that the width of the waist protection portion provided in the waist protection belt in a direction substantially parallel to the wearer's height direction is approximated to the width of the cylindrical portion in a direction substantially parallel to the wearer's height direction. Note that the direction substantially parallel to the wearer's height direction is also a direction substantially parallel to the vertical direction and is a direction parallel to direction I described later. Hereinafter, it may be referred to as the substantially vertical direction.

[0041] Therefore, in order to make the retention of the waist protection belt by the lower garment excellent, it is normal for the wearer of the lower garment to adopt a waist protection belt to be worn on the lower garment, in which the width of the waist protection part provided in this waist protection belt in the substantially vertical direction is approximated to the width of the tubular part of the lower garment in the substantially vertical direction. And in this case, when the ratio (W2 / W1) of W1 and W2 is 0.70 or more, while maintaining the form stability of the front part of the tubular part, the work of inserting and removing the waist protection belt into and out of the tubular part becomes easy, and as the waist protection belt to be worn on the lower garment, a waist protection belt provided with a waist protection part having a sufficiently large width in the substantially vertical direction can be adopted (although details will be described later, a waist protection belt having a width of 5 to 20 cm in the substantially vertical direction and provided with a waist protection part having a sufficiently large width tends to exhibit excellent waist protection performance). Further, by setting the ratio (W2 / W1) of W1 and W2 to 1.00 or less, the deformation of the tubular part when inserting and removing the waist protection belt from the tubular part can be minimized, and the form stability of the entire tubular part can be maintained. From these points, in order to ensure a slit width sufficient for inserting and removing the waist protection belt while maintaining the form stability of the front part of the tubular part, the ratio (W2 / W1) of W1 and W2 is within the above range. Also, from the above viewpoints, it is more preferable that the ratio (W2 / W1) of W1 and W2 is 0.80 or more, while on the other hand, it is more preferable that it is 0.98 or less. Note that W1 refers to the value of the maximum width among the widths of the tubular part in the direction orthogonal to the waist circumference direction in the part of the tubular part where the slit is provided, and W2 refers to the value of the maximum width among the widths in the longitudinal direction of the slit.

[0042] Also, when the width in the direction orthogonal to the longitudinal direction of the slit is W3, it is preferable that this W3 is 0.5 cm or more and 3 cm or less. When W3 is 0.5 cm or more, the overall rigidity of the waist protection belt is high, and even for a waist protection belt that is difficult to bend significantly, it becomes easier to attach the waist protection belt to the tubular portion. Specifically, after inserting one end of the waist protection belt through the slit provided in the tubular portion, when inserting the other end of the waist protection belt into the slit, it is necessary to bend significantly the portion of the waist protection belt that extends out of the tubular portion. However, the larger W3 is, the smaller the degree of bending of the portion of the waist protection belt that extends out of the tubular portion can be. As a result, it becomes easier to attach the waist protection belt to the tubular portion. On the other hand, when W3 is 3 cm or less, the fixing of the waist protection belt to the undergarment by the tubular portion becomes stronger. Specifically, the smaller W3 is, the smaller the portion of the waist protection belt that is not covered by the tubular portion of the waist protection belt attached to the undergarment by the slit provided in the tubular portion becomes, and the waist protection belt is more firmly fixed to the undergarment by the tubular portion. Note that W3 refers to the value of the maximum width among the widths in the direction orthogonal to the longitudinal direction of the slit.

[0043] Here, the undergarment body fabric of the undergarment in the first embodiment will be described. In the undergarment of this embodiment, the undergarment body fabric is the fabric other than the planar fabric that constitutes the front portion of the tubular portion among the members that constitute the undergarment. FIG. 13 is an external view of the undergarment shown in FIG. 1. In FIG. 13, although it is a portion that cannot be seen, the planar fabric that constitutes the front portion 6 of the tubular portion is shown by a dashed line, and the undergarment body fabric 24 is shown by a solid line.

[0044] Also, FIG. 12 is a cross-sectional view taken along the line E-E' of the undergarment shown in FIG. 2. In the embodiment of the undergarment of the present invention shown in FIG. 1, a tubular portion composed of the undergarment fabric 5 at the waist circumference portion on the back and the planar fabric that constitutes the front portion 6 of the tubular portion is formed at the back portion 18 at the waist circumference portion. Further, the space inside the tubular portion, that is, the space between the undergarment fabric 5 at the waist circumference portion on the back and the front portion 6 of the tubular portion is the space 21 for arranging the waist protection belt. In the state of the undergarment with a belt where the belt is attached, the waist protection portion of the waist protection belt is stored in this space 21 for arranging the waist protection belt.

[0045] Next, FIG. 4 is a front view showing one side of a waist protection belt that can be worn on the lower garments of both the first and second embodiments. FIG. 5 is a rear view of the waist protection belt. This waist protection belt 9 has a waist protection part 10, belt parts 11 arranged on the left and right of the waist protection part 10, a first fixing member 12 arranged at one end of the waist protection belt, a second fixing member 13 arranged at the other end of the waist protection belt, and a bone 14 arranged at the center of the waist protection part 10.

[0046] The waist protection part 10 of the waist protection belt 9 shown in FIGS. 4 and 5 is in the shape of a belt with a large width. Such a large width is suitable for arranging the bone. Different from what is shown in the figures, the waist protection part may have the same width as the belt part or may be narrower than the belt part. The width (back width) of the waist protection part in the longitudinal direction of the wearer's body is preferably 5 to 20 cm. By setting the back width to 5 cm or more, it is possible to prevent the tightening pressure on the wearer's waist from concentrating on the narrow part, making the pressure relatively high and excessively compressing blood vessels and the like. Also, in the positioning when arranging the waist protection part, it is possible to reduce the burden of making the upper part of the pelvis covered by the waist protection part. By setting the back width to 20 cm or less, it is possible to further reduce the discomfort during long-term wearing. Considering these points, in order to minimize movement restriction while ensuring long-term wearing and workability, it is preferable that the back width of the waist protection part is within the above range. Also, from the above viewpoints, the back width is more preferably 8 cm or more, while more preferably 15 cm or less.

[0047] The waist protection part may be made of the same material as the belt part or a different material. As the material for the waist protection part and the belt part, fabrics, synthetic leather, etc. can be used. For the reason that the waist protection belt can be made washable, the above material is preferably a fabric. Further, as the material of the above fabric, synthetic fibers such as polyethylene terephthalate fibers and polyamide fibers, natural fibers such as cotton, and regenerated fibers such as rayon can be used. Also, a plurality of the above fibers can be used as the material of the above fabric.

[0048] Also, the waist protection part preferably includes a bone to stabilize the position of the spine. Here, the material of the bone is preferably one with relatively high bending stress, such as metal and resin. Examples of its shape include a spiral shape, a strip-shaped bone having a longitudinal direction in the wearer's height direction, and a plate-shaped one covering the waist protection part in a plane. Also, the strip-shaped bone and the plate-shaped bone may be used in combination.

[0049] Also, although not shown, the waist protection part may be provided with an anti-slip member.

[0050] And in a state where the above waist protection belt is worn on the undergarment of the present invention, by joining the first fixing member and the second fixing member provided in this waist protection belt in front of the wearer, the pressure on the wearer's waist can be increased. Since the adjustment range of the pressure on the wearer's waist can be increased, at least one of the first fixing member and the second fixing member is preferably long in at least the longitudinal direction of the waist protection belt. Further, for the purpose of increasing the width of adjusting the pressure on the wearer's waist, an auxiliary belt made of a strip-shaped flat rubber or the like may be provided.

[0051] Here, it is preferable to use a hook-and-loop fastener as the material for the first fixing member and the second fixing member provided in this waist protection belt in order to lock them to each other. Although there are no particular restrictions on the type of hook-and-loop fastener in that case, considering that pilling may occur on the lower body fabric by damaging the lower body fabric, it is preferable to use a mushroom-shaped hook-and-loop fastener in which the tip of the male protrusion is rounded.

[0052] FIG. 6 is a front and top view showing a state in which the waist protection belt shown in FIG. 4 is worn on the lower body of FIG. 1. FIG. 7 is a cross-sectional view taken along line B-B' of the lower body of FIG. 6 and the waist protection belt attached thereto. In this embodiment, inside the cylindrical portion 3, the waist protection belt 9 is inserted and arranged such that the longitudinal direction of the waist protection belt 9 is substantially parallel to the axial direction of the cylindrical portion 3, and the side of the waist protection belt on which the bone is provided (hereinafter, this surface of the waist protection belt may be referred to as "surface A of the waist protection belt") faces the wearer side when the lower body is worn. And, the right end portion of the waist protection belt is arranged in a state of protruding from the cylindrical portion outside the cylindrical portion on the right side of the cylindrical portion 3 shown in FIG. 6. Further, the left end portion of the waist protection belt is arranged in a state of protruding from the cylindrical portion outside the cylindrical portion on the left side of the cylindrical portion 3. Further, the waist protection portion provided in this waist protection belt is covered by the cylindrical portion, and the inner surface of the rear portion of the cylindrical portion is in contact with the surface on the opposite side of surface A of the waist protection belt (hereinafter, this surface of the waist protection belt may be referred to as surface B of the waist protection belt). That is, surface B of the waist protection belt is in contact with the inner surface of the lower body fabric at the waist circumference portion of the lower body fabric and on the back.

[0053] Please refer to FIG. 3. In the lower body of the first embodiment, the lower body fabric 5 at the waist circumference portion and on the back corresponds to the rear portion of the cylindrical portion. Then, it is preferable that the coefficient of static friction of its inner surface 22 is 0.2 to 1.0.

[0054] In addition, the stress at 10% elongation in the width direction of the planar material (hereinafter sometimes referred to as direction I) that constitutes the front portion 6 of the cylindrical portion in Fig. 3 is 10 N / 25 mm or less. Here, direction I is also a direction substantially parallel to the height direction of the wearer when wearing the lower garment.

[0055] Here, the material of the planar material is not particularly limited, but a fabric is preferred for reasons of excellent versatility. Among them, a woven fabric or a knitted fabric is more preferred. Further, as the fibers used for the fabric, synthetic fibers and natural fibers can be mentioned, and a plurality of fibers may be used. Considering washability and the versatility of the raw yarn and knitting design, synthetic fibers such as polyester fibers and nylon fibers are preferably used alone, or a synthetic fiber such as a polyester fiber or a nylon fiber is combined with one or more selected from the group consisting of polyurethane fibers, rayon fibers, acrylic fibers, and cotton fibers and used in combination.

[0056] As described above, it is preferable that the stress at 10% elongation in the width direction of the planar material of the front portion of the cylindrical portion (reference numeral 6 in Fig. 7), that is, direction I, is 10 N / 25 mm or less. The fabric that can be used to achieve this is a woven fabric using elastic yarns for both the warp and weft or for either the warp or the weft, or a knitted fabric that is easier to stretch than a woven fabric. In the knitted fabric, it can be obtained by appropriately adjusting the blending ratio of elastic yarns and non-elastic yarns. Specifically, the following are examples of fabrics with a stress at 10% elongation in direction I of 10 N / 25 mm or less. (I) A woven fabric composed of fibers in which elastic fibers (such as polyurethane fibers) are mixed with natural fibers such as silk and wool, regenerated fibers such as rayon, and synthetic fibers such as acrylic fibers and polyester fibers. (II) A knitted fabric composed of fibers in which elastic fibers (such as polyurethane fibers) are mixed with natural fibers such as silk and wool, regenerated fibers such as rayon, and synthetic fibers such as acrylic fibers and polyester fibers. (III) A fabric using multifilaments of composite fibers, in which two types of polyester resins, one mainly composed of polytrimethylene terephthalate (PTT) and the other mainly composed of polyethylene terephthalate, are side-by-side bonded along the fiber length without using elastic fibers, for at least one of the warp and weft. (IV) A knitted fabric using multifilaments of composite fibers, in which two types of polyester resins, one mainly composed of polytrimethylene terephthalate (PTT) and the other mainly composed of polyethylene terephthalate, are side-by-side bonded along the fiber length without using elastic fibers. (V) Power net.

[0057] Here, the power net refers to a fine-mesh net-like fabric made from nylon fibers and elastic fibers (e.g., polyurethane fibers). It has a basis weight of about 100 g / m 2 and is a relatively thin fabric that can stretch well and has excellent kickback properties. For the reason that it can ensure the function of the tubular part provided in the back part of the undergarment and can realize this tubular part compactly, the front part 6 of the tubular part (i.e., the planar object) is preferably made of power net.

[0058] As described above, it is preferable that the static friction coefficient of the inner surface 22 of the rear part of the tubular part (in Fig. 7, it corresponds to the undergarment fabric 5 at the waist circumference part and on the back) is 0.2 or more and 1.0 or less. The reason for selecting this static friction coefficient will be described later. Here, the following are exemplified as means for setting the static friction coefficient of the inner surface 22 of the rear part of the tubular part to 0.2 - 1.0.

[0059] The lower body fabric is made of woven or knitted fabric, and the coefficient of static friction can be adjusted according to the uneven state of the surface of this fabric and the type of yarn that makes up this fabric. In woven fabrics, the coefficient of static friction is small in plain weaves with less surface unevenness, and conversely, the coefficient of static friction is large in twill weaves where diagonal ridges appear on the fabric surface or in satin weaves where diagonal ridges do not appear but the weave points are arranged at regular intervals. Also, generally, providing pile on the surface of the fabric or raising the surface fluff increases the coefficient of static friction. In knitted fabrics, either weft knitting or warp knitting may be used, and the coefficient of static friction can be adjusted according to the coarseness and density of the knitted fabric. However, from the viewpoint that even if the knitting is cut, runs are less likely to occur and as a result the durability is increased, warp knitting is preferred. The coefficient of static friction can also be adjusted according to the shape of the yarn used for the woven or knitted fabric. For example, since filament yarns have less unevenness on the fiber surface compared to spun yarns, the coefficient of static friction of the fabric using this yarn can be made smaller. Also, the coefficient of static friction can be adjusted according to the material of the yarn. For example, polytetrafluoroethylene fibers (PTFE fibers) themselves have a low coefficient of static friction, while conversely, rubber and polyurethane yarns themselves have a high coefficient of static friction. By using such yarns for part or all of the fabric, the coefficient of static friction of the fabric can be adjusted. Also, the coefficient of static friction can be made different values for the front and back surfaces of the fabric. One side of a double-sided knitting structure (tricot) forms knit loops only with elastic yarns to form a warp knitted fabric, and the other side forms knit loops by using a combination of elastic and non-elastic yarns to form a warp knitted fabric. Thus, a high coefficient of static friction is exhibited for the surface formed with knit loops only with elastic yarns.

[0060] Furthermore, the surface 27 of the portion of the front part of the cylindrical part that is far from the human body (that is, the surface on the opposite side of the surface on the wearer side of the front part of the cylindrical part) is also preferably 0.2 to 1.0. Also, as a method for adjusting the coefficient of static friction, examples include adjusting it according to the unevenness of the surface of the knitting or weaving structure, the shape and type of the yarn, in the same manner as the method for adjusting the coefficient of static friction of the inner surface of the lower body fabric 5 at the waist circumference part on the back. When the coefficient of static friction of the surface of the portion of the front part of the cylindrical part that is far from the human body is 0.2 to 1.0, the effect of simplifying the operation of inserting the waist protection belt in the lower garment of the first embodiment becomes more remarkable.

[0061] Further, the static friction coefficient of the outer surface 23 of the front portion of the cylindrical portion (i.e., the surface of the portion of the cylindrical portion close to the human body) is preferably 0.2 to 1.0. Also, as a method for adjusting the static friction coefficient, it can be adjusted by the unevenness of the surface of the knitting or weaving structure, the shape and type of the yarn, in the same manner as the method for adjusting the static friction coefficient of the inner surface of the undergarment fabric 5 on the back at the waist circumference portion. When the static friction coefficient of the outer surface of the front portion of the cylindrical portion is 0.2 to 0.1, it is possible to suppress the slide in the height direction of the wearer's waist of the undergarment worn by the wearer accompanying the movement of the wearer, and the comfort of the wearer can be improved.

[0062] Subsequently, the undergarment having the cylindrical portion of the second embodiment will be described below.

[0063] The cylindrical portion of the second embodiment is composed of a surface material different from the undergarment body fabric.

[0064] FIG. 8 is a view of the undergarment of the second embodiment as seen from the front and above. FIG. 9 is a cross-sectional view taken along the line C-C' of the undergarment shown in FIG. 8. Also in this embodiment, as shown in FIG. 8, the undergarment 1 has a waist circumference portion 2, and a cylindrical portion 3 is provided on the back of the waist circumference portion 2. Further, the axial direction of this cylindrical portion 3 is substantially parallel to the waist circumference direction of the waist circumference portion. The cylindrical portion of the second embodiment is composed of a surface material different from the undergarment body fabric, and is composed of, for example, a cylindrical portion front portion 15 and a cylindrical portion rear portion 15' as shown in FIG. 9. The upper end and the lower end of the cylindrical portion are connected to the undergarment fabric on the back at the waist circumference portion of the undergarment body fabric by a locking portion 16 and a locking portion 17, respectively.

[0065] Also, only one slit 26 is arranged at approximately the center of the front part 15 of the cylindrical part shown in FIGS. 8 and 9, and this slit 26 is installed such that its longitudinal direction is substantially orthogonal to the waist circumference direction. If there is no such slit 26, it will be a cylindrical part as shown in FIG. 22. In such a structure of the cylindrical part, when wearing the waist protection belt, one end of the belt is inserted through one opening of the cylindrical part and then inserted through the other opening of the cylindrical part to wear the belt. In such a wearing method, there is a possibility that the belt may get clogged in the middle or the belt may bend inside the cylindrical part. In that case, the operator needs to put a hand inside the cylindrical part from the other opening of the cylindrical part and pull out the belt. However, even when pulling out the belt by putting a hand through the other opening of the cylindrical part like this, if the insertion distance of the belt is long, such as from one opening of the cylindrical part to the other opening, it tends to be difficult to reach the clogged part of the belt with a hand. Because of the various inconveniences as described above, in the undergarment configured to adopt the method of inserting the belt from the opening arranged at one end of both ends of the cylindrical part, there is a problem that it takes time for the wearer to complete the attachment of the waist protection belt to the cylindrical part. However, by providing the above slit 26, the waist protection belt can be easily attached to the undergarment according to the procedures shown in FIGS. 23, 24, and 25. Specifically, first, insert one end of the waist protection belt from the center of the back to either the left or right end into the cylindrical part (FIG. 24), and then pass the other end of the waist protection belt through the cylindrical part on the opposite side from the previous one (FIG. 25), making it possible to wear the waist protection belt and significantly shortening the time for the waist protection belt insertion operation. And as shown in FIG. 8, only one slit 26 is provided in the cylindrical part. The reason for limiting the number of slits 26 to one is as follows. The slit in the undergarment of the second embodiment is arranged for the purpose of simplifying the operation of inserting the waist protection belt through this slit and inserting the waist protection belt into the cylindrical part.Therefore, if the number of these slits is two or more (for example, two slits, slit A and slit B), when passing the waist protection belt through slit A into the cylindrical portion, the tip of the waist protection belt will get caught on slit B, making it difficult for the belt to enter smoothly from slit A. Instead, it will increase the labor, and the effect of installing the slit in the front portion of the cylindrical portion cannot be fully obtained. Furthermore, the more the number of slits increases, the more labor is increased as described above, and it can be said that the effect of installing the slit in the front portion of the cylindrical portion becomes smaller. For the reasons described above, the number of slits installed in the front portion of the cylindrical portion is limited to one.

[0066] Also, the slit is provided in the front portion of the cylindrical portion and substantially at the central portion in the longitudinal direction of the cylindrical portion. The reasons for setting the installation position of the slit at the front portion of the cylindrical portion and substantially at the central portion in the longitudinal direction of the cylindrical portion are as follows. First, since the installation position of the slit is at the front portion of the cylindrical portion, it is possible to attach and detach the waist protection belt to and from the cylindrical portion even while wearing underwear, and the attachment and detachment of the waist protection belt is simpler than when the slit is provided at the rear portion of the cylindrical portion. Also, as described above, the slit in the underwear of the second embodiment is arranged for the purpose of facilitating the operation of inserting the waist protection belt through this slit and inserting the waist protection belt into the cylindrical portion. Therefore, if this slit is installed at a location extremely close to either one of the two ends of the front portion of the cylindrical portion, the ease of operation will be almost the same as when inserting the waist protection belt from either one of the two ends of the conventional cylindrical portion, and the effect of installing the slit in the front portion of the cylindrical portion will be extremely reduced. For the reasons described above, it is preferable that slit 26 is arranged at the front portion of the cylindrical portion and at the central portion in the longitudinal direction of the cylindrical portion. However, as long as it does not significantly affect the workability of attaching the waist protection belt to the underwear, the position of the slit 26 in the cylindrical portion may be a position closer to one end side of the cylindrical portion from the central portion in the longitudinal direction of the cylindrical portion. The substantially central portion in the longitudinal direction of the cylindrical portion refers to a part of the cylindrical portion located in the middle when the cylindrical portion is divided into three equal parts in the longitudinal direction.

[0067] For the above reasons, only one slit is provided in the substantially central portion of the front part of the cylindrical part in the undergarment of the second embodiment.

[0068] Furthermore, the cylindrical part is provided with only one slit that satisfies the following conditions (1) and (2). (1) The slit is provided such that the longitudinal direction of the slit is substantially orthogonal to the waist circumference direction. (2) The ratio (W2 / W1) of the width (W1) of the cylindrical part in the direction orthogonal to the waist circumference direction to the width (W2) of the slit in the longitudinal direction of the slit is 0.70 to 1.00.

[0069] The slit is provided such that the longitudinal direction of the slit is substantially orthogonal to the waist circumference direction. Note that the longitudinal direction being substantially orthogonal to the waist circumference direction means that the acute angle formed by the longitudinal direction and the direction orthogonal to the waist circumference direction is 0 to 15 degrees. By arranging the slit in this way, the insertion direction of the waist protection belt into the cylindrical part becomes substantially parallel to the longitudinal direction of the cylindrical part, and the wearing operation of the waist protection belt becomes simple. Here, there is no particular restriction on the shape of the slit. For example, a substantially elliptical slit as shown in FIGS. 8 and 24 can be mentioned. Also, this slit may be simply a cut made in the center of the planar material of the front part of the cylindrical part, or it may be a slit whose edge of the opening is sandwiched with a fabric and hemmed and sewn. Since the waist protection belt is inserted and removed through this slit many times, from the viewpoint of enhancing the durability of the slit, it is more preferable to sandwich the edge of the opening of the slit with a fabric, hem it, and sew it. Furthermore, the fabric used for hemming the edge of this slit is preferably an elastic fabric in order to facilitate the insertion and removal of the waist protection belt. Examples of the material for obtaining this elastic fabric include the same materials as the planar material of the front part of the cylindrical part described in the first embodiment.

[0070] Furthermore, it is preferable that the slit is only present in the front portion of the cylindrical part. Since the slit is only present in the front portion of the cylindrical part, when inserting the waist protection belt through the slit, it is possible to prevent the waist protection belt from accidentally getting between the rear portion of the cylindrical part and the lower body fabric, which would otherwise increase the effort required to re-extract the waist protection belt and re-insert it into the slit. Therefore, a smooth insertion operation of the waist protection belt becomes possible. For the above reasons, having the slit only in the front portion of the cylindrical part makes the waist protection belt attachment operation simpler compared to the case where the slit is also present in the rear portion of the cylindrical part as shown in Fig. 20. From the perspective of making the operation simpler, it is preferable that the slit is only present in the front portion of the cylindrical part.

[0071] Furthermore, as shown in FIG. 8, also in the undergarment of the second embodiment, when the width of the tubular portion is W1 and the longitudinal width of the slit is W2, the ratio (W2 / W1) of W2 to W1 is 0.70 to 1.00. Here, on the premise that the retention of the waist protection belt by the undergarment is excellent, from the viewpoint that the width of the waist protection portion provided in the waist protection belt in a direction substantially parallel to the wearer's height direction (that is, a direction substantially parallel to the vertical direction, a direction parallel to the aforementioned direction I, and sometimes referred to as a substantially vertical direction) is preferably approximated to the width of the tubular portion in the direction substantially parallel to the wearer's height direction. Therefore, in order to make the retention of the waist protection belt by the undergarment excellent, it is normal for the wearer of the undergarment to adopt a waist protection belt to be worn on the undergarment, in which the width of the waist protection portion provided in the waist protection belt in the substantially vertical direction is approximated to the width of the tubular portion of the undergarment in the substantially vertical direction. And in this case, when the ratio (W2 / W1) of W2 to W1 is 0.70 or more, it becomes easy to take in and out the waist protection belt into and out of the tubular portion while maintaining the form stability of the front portion of the tubular portion, and as the waist protection belt to be worn on the undergarment, a waist protection belt provided with a waist protection portion having a sufficiently large width in the substantially vertical direction can be adopted. As described above, a waist protection belt having a width of 5 to 20 cm in the substantially vertical direction and a sufficiently large width waist protection portion tends to exhibit excellent waist protection performance. Also, by setting the ratio (W2 / W1) of W2 to W1 to 1.00 or less, the deformation of the tubular portion when taking in and out the waist protection belt from the tubular portion can be minimized, and the form stability of the entire tubular portion can be maintained. Based on these points, in order to ensure a slit width sufficient for taking in and out the waist protection belt while maintaining the form stability of the front portion of the tubular portion, the ratio (W2 / W1) of W2 to W1 is within the above range. Also, from the above viewpoint, the ratio (W2 / W1) of W2 to W1 is more preferably 0.80 or more, while more preferably 0.98 or less. Note that W1 refers to the maximum value of the width of the tubular portion in the direction orthogonal to the waist circumference direction in the portion of the tubular portion where the slit is provided, and W2 refers to the longitudinal width of the slit. Also, when the width in the direction orthogonal to the longitudinal direction of the slit is W3, it is preferable that this W3 is 0.5 cm or more and 3 cm or less. When W3 is 0.5 cm or more, the overall rigidity of the waist protection belt is high, and even for a waist protection belt that is difficult to bend significantly, it becomes easy to attach the waist protection belt to the tubular portion. Specifically, after inserting one end of the waist protection belt through the slit provided in the tubular portion, when inserting the other end of the waist protection belt into the slit, it is necessary to bend significantly the portion of the waist protection belt that extends out of the tubular portion. However, the larger W3 is, the smaller the degree of bending of the portion of the waist protection belt that extends out of the tubular portion becomes, and as a result, it becomes easy to attach the waist protection belt to the tubular portion. On the other hand, when W3 is 3 cm or less, the fixing of the waist protection belt to the undergarment by the tubular portion becomes stronger. Specifically, the smaller W3 is, the smaller the portion of the waist protection belt that is not covered by the tubular portion of the waist protection belt attached to the undergarment by the slit provided in the tubular portion becomes, and the waist protection belt is more firmly fixed to the undergarment by the tubular portion. Note that W3 refers to the maximum width among the widths in the direction orthogonal to the longitudinal direction of the slit.

[0072] FIG. 14 is an external view of the undergarment of the second embodiment shown in FIG. 8. In FIG. 14, although it is a portion that cannot be seen, a cloth 15 having a tubular shape is shown by a dashed line, and the undergarment body fabric 24 is shown by a solid line. And FIG. 10 is a front and top view showing a state in which the waist protection belt shown in FIGS. 4 and 5 is attached to the undergarment shown in FIG. 8 which is the second embodiment. FIG. 11 is a cross-sectional view taken along the line D-D' of the undergarment shown in FIG. 10 with the waist protection belt attached.

[0073] Please refer to Fig. 10. In the second embodiment, a waist protection belt 9 is inserted and arranged inside the cylindrical portion 3. The longitudinal direction of the waist protection belt 9 is substantially parallel to the axial direction of the cylindrical portion 3, and the surface A of the waist protection belt faces the wearer side when the undergarment is worn. The right end of the waist protection belt on the right side of the cylindrical portion 3 is arranged in a state of protruding from the cylindrical portion, and the left end of the waist protection belt is arranged in a state of protruding from the cylindrical portion outside the left side of the cylindrical portion. Also, the waist protection portion provided in the waist protection belt is covered by the cylindrical portion, and the inner surface of the rear portion of the cylindrical portion can be in contact with the surface B of the waist protection belt. That is, the surface B of the waist protection belt can be in contact with the surface on the opposite side of the surface in contact with the inner surface of the undergarment fabric at the waist circumference of the undergarment body fabric of the cylindrical fabric 15 at the back.

[0074] Also in the undergarment of the second embodiment, it is preferable that the coefficient of static friction of the inner surface (the surface denoted by reference numeral 22 in Fig. 9) of the rear portion of the cylindrical portion is 0.2 to 1.0. The reason for selecting this coefficient of static friction will be described later. And the stress at 10% elongation in the width direction (direction I) of the front portion of the cylindrical portion is preferably 10 N / 25 mm or less.

[0075] Also in the undergarment of the second embodiment, the material of the surface material constituting the cylindrical portion is not particularly limited, but a preferable one is fabric. As the material having such a coefficient of static friction and the stress at the time of elongation, those described in the first embodiment can be used. In addition to the method of folding the fabric and joining the upper portion, the method of sewing two or more pieces of fabric together, or using a circular knitted fabric as it is to form a cylindrical shape can be used. It may be used as it is to form the cylindrical portion.

[0076] Furthermore, the surface 27 of the portion of the front part of the cylindrical part that is far from the human body (i.e., the surface on the opposite side of the surface on the wearer side of the front part of the cylindrical part) is also preferably 0.2 to 1.0. As a method for adjusting the coefficient of static friction, it can be adjusted by the unevenness of the surface of the knitting or weaving structure, the shape and type of the yarn, in the same manner as the method for adjusting the coefficient of static friction of the inner surface of the undergarment fabric 5 on the back at the waist circumference part in the first embodiment. When the coefficient of static friction of the surface of the portion of the front part of the cylindrical part that is far from the human body is 0.2 to 1.0, the effect of simplifying the operation of inserting the waist protection belt in the undergarment of the second embodiment becomes more remarkable.

[0077] Also, the coefficient of static friction of the outer surface 23 of the front part of the cylindrical part (i.e., the surface of the portion of the cylindrical part close to the human body) is preferably 0.2 to 1.0. As a method for adjusting the coefficient of static friction, it can be adjusted by the unevenness of the surface of the knitting or weaving structure, the shape and type of the yarn, in the same manner as the method for adjusting the coefficient of static friction of the inner surface of the undergarment fabric 5 on the back at the waist circumference part in the first embodiment. When the coefficient of static friction of the outer surface of the front part of the cylindrical part is 0.2 to 0.1, it is possible to suppress the slide in the longitudinal direction of the wearer's body of the undergarment worn by the wearer along with the movement of the wearer, and the comfort of the wearer can be made good.

[0078] And the cylindrical part composed of the front part 15 and the rear part 15' of the cylindrical part is continuously or intermittently connected to the undergarment fabric 5 at the upper end by the locking part 16 in the waist circumference direction. It is preferable that the upper end of the cylindrical part is connected to the waist circumference part because it can prevent the wearer's toenails or the like from getting caught between the cylindrical part and the undergarment fabric 5 when wearing the undergarment of this embodiment.

[0079] However, it is not limited to the form shown in FIG. 9. A form in which a portion slightly below the upper end of the planar object (a portion located below the upper end of the planar object) is connected, that is, a form in which the upper end of the planar object protrudes above the locking part may also be acceptable.

[0080] Also, in Fig. 9, the lower end of the cylindrical part is intermittently connected in the waist circumference direction to the undergarment fabric 5 on the back at the waist circumference part by the locking part 17. The reason why it is preferable to connect at the lower end is as follows.

[0081] The lower end part of the cylindrical part can be fixed along the inner surface of the undergarment fabric. As a result, when the waist protection belt is passed through the inside of the cylindrical part, it fits well. Also, it is possible to prevent the lower end part of the cylindrical part from moving freely inside the undergarment. Since it is possible to prevent the cylindrical part from bending inside the undergarment, the wearer can pass the waist protection belt through the cylindrical part even while wearing the undergarment.

[0082] It is not limited to the form shown in Fig. 9. A form in which a part slightly above the lower end of the planar object (a part located above the lower end of the planar object) is connected, that is, a form in which the lower end of the fabric protrudes below the locking part may also be acceptable.

[0083] In the undergarment having a cross-section as shown in Fig. 9 in the present invention, the cylindrical part is connected to the undergarment fabric on the back by the locking part 16 and the locking part 17. However, the upper end or the lower end of the fabric may be continuously connected to this undergarment fabric.

[0084] Here, examples of the intermittent or continuous locking part include the means described in the first embodiment.

[0085] In addition, in common with the first embodiment and the second embodiment, only one slit is arranged at substantially the central portion of the front part of the cylindrical portion, and this slit is provided such that its longitudinal direction is orthogonal to the waist circumference direction. By providing such a slit, the insertion direction of the waist protection belt into the cylindrical portion becomes substantially parallel to the longitudinal direction of the cylindrical portion, and the operation of attaching the waist protection belt to the cylindrical portion becomes simple. Here, there is no particular restriction on the shape of the slit. For example, a substantially elliptical slit as shown in FIGS. 1 and 8 can be mentioned. Further, this slit may be simply a cut made in the center of the planar material at the front part of the cylindrical portion, or may be one in which the edges of the slit opening are sandwiched with a fabric and hemmed and sewn. Since the waist protection belt is inserted and removed through this slit many times, from the viewpoint of enhancing the durability of the slit, it is more preferable to sandwich the edges of the slit opening with a fabric, hem them, and sew them. Furthermore, the fabric used for hemming the edges of this slit is preferably an elastic fabric in order to simplify the insertion and removal of the waist protection belt, and examples of the material for obtaining this elastic fabric are the same as those of the material of the planar material at the front part of the cylindrical portion described above.

[0086] And as shown in FIGS. 1 and 8, only one slit is provided at the front part of the cylindrical portion and at the central portion in the longitudinal direction of the cylindrical portion. The reason for limiting the number of slits to one is as follows. The slit in the undergarment of the present embodiment is arranged for the purpose of inserting the waist protection belt through this slit and simplifying the operation of inserting the waist protection belt into the cylindrical portion. Therefore, if the number of these slits is two or more (for example, two slits A and B), when passing the waist protection belt from slit A into the cylindrical portion, the tip of the waist protection belt will be caught by slit B, making it difficult for the belt to enter smoothly from slit A, and instead, the labor will increase and the effect of providing the slit at the front part of the cylindrical portion will not be sufficiently obtained. Furthermore, it can be said that as the number of slits increases, the labor as described above increases, and the effect of providing the slit at the front part of the cylindrical portion becomes smaller. For the reasons described above, the number of slits provided at the front part of the cylindrical portion is limited to one.

[0087] Also, the reason for setting the slit at the front part of the cylindrical part and the central part in the longitudinal direction of the cylindrical part is as follows. As described above, the slit in the undergarment of the present invention is arranged for the purpose of facilitating the operation of inserting the waist protection belt through this slit and inserting the waist protection belt into the cylindrical part. Therefore, if this slit is installed at a position extremely close to either one of the two ends of the front part of the cylindrical part, the ease of operation will be almost the same as when inserting the waist protection belt from either one of the two ends of the conventional cylindrical part, and the effect of installing the slit in the front part of the cylindrical part will be extremely reduced. For the above reasons, it is preferable that the slit is arranged at the front part of the cylindrical part and the central part in the longitudinal direction of the cylindrical part. However, as long as it does not have a significant adverse effect on the workability of attaching the waist protection belt to the undergarment, the position of the slit in the cylindrical part may be a position closer to one end side of the cylindrical part from the central part in the longitudinal direction of the cylindrical part. Here, the position of the slit where it does not have a significant impact on the workability of attaching the waist protection belt to the undergarment is referred to as the substantially central part in the longitudinal direction of the cylindrical part. The substantially central part in the longitudinal direction of the cylindrical part refers to a part of the cylindrical part located in the middle when the cylindrical part is divided into three equal parts in the longitudinal direction. For the above reasons, only one slit is provided at the substantially central part of the front part of the cylindrical part in the undergarment of the present invention.

[0088] Furthermore, in common with the first embodiment and the second embodiment, when the width of the cylindrical portion is W1 and the longitudinal width of the slit is W2, the ratio (W2 / W1) of W2 to W1 is 0.70 to 1.00. Here, on the premise that, from the viewpoint of making the holding performance of the waist protection belt by the undergarment excellent, it is more preferable that the width of the waist protection portion provided in the waist protection belt in a direction substantially parallel to the wearer's height direction (that is, a direction substantially parallel to the vertical direction and parallel to the aforementioned direction I) is approximated to the width of the cylindrical portion in the direction substantially parallel to the wearer's height direction. Therefore, in order to make the holding performance of the waist protection belt by the undergarment excellent, it is normal for the wearer of the undergarment to adopt a waist protection belt to be worn on the undergarment, in which the width of the waist protection portion provided in the waist protection belt in the substantially vertical direction is approximated to the width of the cylindrical portion of the undergarment in the substantially vertical direction. And in this case, when the ratio (W2 / W1) of W2 to W1 is 0.70 or more, it becomes easy to take in and out the waist protection belt into and out of the cylindrical portion while maintaining the morphological stability of the front portion of the cylindrical portion, and as the waist protection belt to be worn on the undergarment, a waist protection belt provided with a waist protection portion having a sufficiently large width in the substantially vertical direction can be adopted (as described above, a waist protection belt having a width of 5 to 20 cm in the substantially vertical direction and provided with a waist protection portion having a sufficiently large width tends to exhibit excellent waist protection performance). Also, by setting the ratio (W2 / W1) of W2 to W1 to 1.00 or less, the deformation of the cylindrical portion when taking in and out the waist protection belt from the cylindrical portion can be minimized, and the morphological stability of the entire cylindrical portion can be maintained. Based on these points, in order to ensure a slit width sufficient for taking in and out the waist protection belt while maintaining the morphological stability of the front portion of the cylindrical portion, the ratio (W2 / W1) of W2 to W1 is within the above range. Also, from the above viewpoints, it is more preferable that the ratio (W2 / W1) of W2 to W1 is 0.80 or more, while it is more preferable that it is 0.98 or less. Note that W1 refers to the value of the maximum width among the widths of the cylindrical portion in the direction perpendicular to the waist circumference direction in the front portion of the cylindrical portion where the slit is provided.

[0089] Also, when the width in the direction orthogonal to the longitudinal direction of the slit is W3, it is preferable that this W3 is 0.5 cm or more and 3 cm or less. When W3 is 0.5 cm or more, the overall rigidity of the waist protection belt is high, and even for a waist protection belt that is difficult to bend significantly, it becomes easier to attach the waist protection belt to the tubular portion. Specifically, after inserting one end of the waist protection belt through the slit provided in the tubular portion, when inserting the other end of the waist protection belt into the slit, it is necessary to bend significantly the portion of the waist protection belt protruding from the tubular portion. However, the larger W3 is, the smaller the bending of the portion of the waist protection belt protruding from the tubular portion becomes, and as a result, it becomes easier to attach the waist protection belt to the tubular portion. On the other hand, when W3 is 3 cm or less, the fixing of the waist protection belt to the undergarment by the tubular portion becomes stronger. Specifically, the smaller W3 is, the smaller the portion of the waist protection belt not covered by the tubular portion worn on the undergarment by the slit provided in the tubular portion becomes, and the waist protection belt is more firmly fixed to the undergarment by the tubular portion. Note that W3 refers to the value of the maximum width among the widths in the direction orthogonal to the longitudinal direction of the slit.

[0090] Also, in common to the first embodiment and the second embodiment, it is preferable that the static friction coefficient of the outer surface of the front portion of the tubular portion (that is, the surface of the portion of the tubular portion close to the human body) is 0.2 to 1.0. That is, in this embodiment, it is preferable that the static friction coefficient of the surface of the surface object constituting the front portion of the tubular portion close to the human body is 0.2 or more and 1.0 or less. Here, the surface of the surface object constituting the tubular portion closer to the human body is, for example, in the undergarment shown in FIGS. 10 and 11, the surface of the front portion 15 of the tubular portion that can come into contact with the body of the wearer or the undergarments worn by the wearer when the undergarment is worn. Note that the means for adjusting the static friction coefficient of the fabric is as described above. When the static friction coefficient of the surface of the front portion of the tubular portion close to the human body is 0.2 to 1.0, the effect of suppressing the sliding in the height direction of the wearer's body of the undergarment worn by the wearer accompanying the movement of the wearer becomes more remarkable.

[0091] The effects of the inner thigh garment according to the first embodiment and the inner thigh garment according to the second embodiment, which are common in that the coefficient of static friction and the stress at elongation are within a specific range, will be described. The coefficient of static friction of the inner surface of the rear part of the cylindrical part of the waist circumference part of the inner thigh garment is preferably 0.2 to 1.0, and the stress at 10% elongation of the front part of this cylindrical part is preferably 10 N / 25 mm or less. And by having the above characteristics, the inner thigh garment of the present invention simplifies the operation of attaching the waist protection belt to the cylindrical part. The assumed mechanism for achieving the above effects is considered as follows.

[0092] That is, when attaching the waist protection belt to the cylindrical part, one end of the belt part of the waist protection belt is inserted through the slit provided at the center of the front part of the cylindrical part indicated by reference numeral 25 in FIG. 1 and reference numeral 26 in FIG. 8, and when it is inserted up to near the center of the waist protection part (FIG. 24), the waist protection belt is inserted into the slit provided at the center of the front part of the cylindrical part in the same manner from the other end of the belt part, and the waist protection belt is attached to the cylindrical part (FIG. 25). At that time, the inner surface of the rear part of the cylindrical part comes into contact with surface B of the waist protection belt. And in this operation, since the coefficient of static friction of the inner surface of the rear part of the cylindrical part of the waist circumference part of the inner thigh garment of the present invention is as small as 0.2 or more and 1.0 or less, the waist protection belt moves smoothly without getting caught in the cylindrical part, and the attachment operation becomes simple. Further, when the front part of the cylindrical part extends upward appropriately, especially when inserting both ends of the waist protection belt from the same slit, the elasticity of the front part of the cylindrical part can widen the opening of the slit slightly, leading to a smoother insertion operation.

[0093] In common with the first embodiment and the second embodiment, as described above, the coefficient of static friction of the inner surface of the rear portion of the cylindrical portion provided in the lower garment of the present invention is preferably 0.2 to 1.0. When the coefficient of static friction of the inner surface of the rear portion of the cylindrical portion is 1.0 or less, the waist protection belt can be smoothly inserted into the cylindrical portion without being caught. On the other hand, when the coefficient of static friction of the inner surface of the rear portion of the cylindrical portion is 0.2 or more, there is also the following effect. That is, it is possible to suppress the waist protection belt from moving excessively in the cylindrical portion at the waist circumference portion of the lower garment and making the operation of inserting the waist protection belt into the cylindrical portion difficult. Since the above effects can be made more excellent, this coefficient of static friction is preferably 0.3 or more, and more preferably 0.4 or more. Also, since the above effects can be made more excellent, this coefficient of static friction is more preferably 0.8 or less, and even more preferably 0.6 or less.

[0094] In common with the first embodiment and the second embodiment, in the lower garment of the present invention, the stress at 10% elongation in direction I of the front portion of the cylindrical portion is preferably 10 N / 25 mm or less. When the stress at 10% elongation in direction I of the front portion of the cylindrical portion is 10 N / 25 mm or less, when inserting the waist protection belt from the slit at the approximate center of the cylindrical portion, the elasticity of the cylindrical portion causes the opening of the slit to slightly widen, making it easier to insert the waist protection belt, as described above. For the reason that the above effect becomes extremely remarkable, the stress at 10% elongation in direction I of the front portion of the cylindrical portion is more preferably 1 N / 25 mm or less. Here, direction I of the cylindrical portion refers to the direction parallel to the height direction of the wearer. Also, the lower limit of the stress at 10% elongation in direction I of the front portion of the cylindrical portion is not particularly limited, but if it elongates too much, it will not completely return to the original length, and wrinkles and a feeling of stiffness around the waist are likely to remain in the fabric. From the viewpoint of such a recovery rate, it is more preferably 0.2 N / 25 mm or more.

[0095] In common with the first embodiment and the second embodiment, in the lower garment of the present invention, The coefficient of static friction of the surface of the front part of the tubular part that is far from the human body (i.e., the surface on the opposite side of the surface on the wearer side of the front part of the tubular part) is also preferably 0.2 to 1.0. That is, when inserting the waist protection belt into the tubular part, the surface of the front part of the tubular part that is far from the human body will come into contact with the surface on the wearer side of the waist protection belt (i.e., surface A of the waist protection belt). Therefore, for the same reason as described above, regarding the coefficient of static friction of the surface of the front part of the tubular part that is far from the human body, being 1.0 or less allows the waist protection belt to be smoothly inserted into the tubular part without getting caught. On the other hand, by the coefficient of static friction of the inner surface of the rear part of the tubular part being 0.2 or more, it is possible to suppress the waist protection belt from moving excessively in the tubular part at the waist circumference part of the undergarment and making the operation of inserting the waist protection belt into the tubular part difficult. Since the above effects can be made more excellent, this coefficient of static friction is preferably 0.3 or more, and more preferably 0.4 or more. Also, since the above effects can be made more excellent, this coefficient of static friction is more preferably 0.8 or less, and even more preferably 0.6 or less.

[0096] Also, in common to the first embodiment and the second embodiment, in the undergarment of the present invention, the coefficient of static friction of the surface of the front part of the tubular part that is close to the human body, i.e., the surface on the wearer side of the front part of the tubular part, is preferably 0.2 to 1.0. In particular, when wearing the undergarment with the waist protection belt attached to the undergarment of the present invention, the undergarment worn by the wearer of this surface and this front part of the tubular part come into strong contact. However, by the coefficient of static friction being 1.0 or less, it is possible to suppress the undergarment from following the movement of the underclothes. On the other hand, if the positional relationship between the underclothes and the undergarment moves without much resistance, a sense of discomfort may be felt. Therefore, the coefficient of static friction of this surface is preferably 0.2 or more. Since these effects can be made more excellent, the coefficient of static friction of this surface is more preferably 0.3 or more, and even more preferably 0.4 or more. Also, since the above effects can be made more excellent, the coefficient of static friction of this surface is more preferably 0.8 or less, and even more preferably 0.6 or less.

[0097] In the undergarment of the first embodiment, the undergarment body fabric forms the rear part of the tubular part. It is preferable that the planar material of the front part constituting the tubular part is connected to the undergarment body fabric continuously or intermittently at the upper part. This connection is preferably at or near the upper end in the width direction in the substantially vertical direction of the tubular part. Here, the upper part of the planar material means a part including the upper end of the planar material and the part located below the upper end of the planar material. It is desirable that the planar material of the front part of the tubular part is also connected to the undergarment body fabric continuously or intermittently at the lower part. This connection is preferably at or near the lower end in the width direction of the tubular part. Here, the lower part of the planar material means a part including the lower end of the planar material and the part located above the lower end of the planar material. By using the undergarment body fabric for about half of the tubular part, a more compact tubular part can be formed compared to the undergarment of the second embodiment.

[0098] On the other hand, in the undergarment of the second embodiment, a planar material other than the undergarment body fabric is used. It is preferable that it is connected to the undergarment body fabric continuously or intermittently at the upper part of the tubular part. This connection is preferably at or near the upper end in the width direction in the substantially vertical direction of the tubular part. Here, the upper part of the planar material means a part including the upper end of the planar material and the part located below the upper end of the planar material. Further, it is also desirable that it is connected to the rear part of the waist part continuously or intermittently in the circumferential direction of the waist at the lower part of the planar material. This connection is preferably at or near the lower end in the width direction of the tubular part. Here, the lower part of the planar material means a part including the lower end of the planar material and the part located above the lower end of the planar material. By suspending the tubular part from the upper part of the tubular part and partially connecting the lower part of the tubular part in this way, when the waist protection belt is inserted into the undergarment, the silhouette from the back looks neat.

[0099] When wearing the undergarment of the present invention, a waist protection belt can be inserted into the tubular portion, and by locking the right end and the left end of the waist protection belt, an appropriate abdominal pressure can be adjusted to be felt at the waist (pelvic position). Here, there are no particular restrictions on the appearance of the undergarment according to the present invention, and the locking portions of the right end and the left end of this waist protection belt may be visible or hidden from the outside of the wearer. Examples of the appearance of the undergarment with a structure in which the locking portions of the right end and the left end of the waist protection belt are visible include those shown in FIGS. 6 and 10. On the other hand, as an example of the appearance of the undergarment with a structure in which the locking portions of the right end and the left end of the waist protection belt are hidden, the undergarment shown in FIG. 15 is mentioned, and the appearance when the waist protection belt is worn on this undergarment is shown in FIG. 16. Thus, a structure in which the waist protection belt is completely locked inside the undergarment and completely stored inside the undergarment may also be used. Further, as an example of the undergarment with a structure that partially hides the waist protection belt, the undergarment shown in FIG. 17 is mentioned, and the appearance when the waist protection belt is worn on this undergarment is shown in FIG. 18. In this way, by locking the covering cloth 28 provided on the front of the undergarment to the front of the undergarment with buttons or the like indicated by reference numeral 29 in FIG. 17, a structure in which the waist protection belt can be partially hidden may also be used. Furthermore, in the undergarment shown in FIG. 17, as shown in FIG. 19, it is also possible to wear it with the locking portions of the right end and the left end of the waist protection belt exposed to the front without hiding them, and depending on the usage scenario and the intention of the wearer, the waist protection belt can be partially hidden or exposed to the front without hiding it. By having such a structure in which the appearance of the undergarment when the waist protection belt is worn can be selected according to the usage scenario and the intention of the wearer, it becomes possible to meet various needs of the wearer with one pattern.

Embodiment

[0100] Hereinafter, the present invention will be described in more detail with reference to embodiments.

[0101] (Measurement method) (Coefficient of static friction) The coefficient of static friction of the fabric sample was measured in accordance with JIS P8147:1994 3.2 Inclination Method. Three test pieces with a width of 25 mm and a length of 130 mm were prepared. Next, one of these three test pieces was attached to the 872 g weight of the sliding inclination angle measuring device. On the other hand, a friction body with a width of 120 mm × length of 200 mm was attached to the sliding inclination angle measuring device, and the weight with the test piece attached was placed on the friction body so that the measuring surface of the test piece was in contact with the friction body, and the length direction of the test piece was aligned with the sliding direction of the sliding inclination angle measuring device. The degree of inclination was increased under the condition of an inclination angle of 3° / second, and the inclination angle when the weight fell was read, and the tangent (tanθ) of the inclination angle was taken as the coefficient of static friction. The coefficient of static friction was also measured for the other two test pieces in the same manner as above, and the average value of the measured values of the coefficient of static friction for the three pieces was taken as the coefficient of static friction of the fabric sample. Here, the test pieces were sampled so that the length direction of the test piece was the same as direction I of the front part of the cylindrical portion. Also, the friction body used was standard cotton (No. 3-1: manufactured by the Japan Standards Association, Inc.), and the direction of the fabric of this standard cotton may be warp or weft.

[0102] (Stress at 10% elongation) The stress at 10% elongation of the fabric sample was measured using an autograph AG-50kNG manufactured by Shimadzu Corporation. Specifically, five test pieces cut to 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 measuring instrument at a chuck distance of 100 mm and pulled at a pulling speed of 300 mm / min until the test piece broke. The same was done for the other four test pieces, and the stress at 10% elongation was measured for each of the five test pieces. Here, the "stress at 10% elongation" refers to the average value of the elongation stress when the elongation of the five fabrics measured by the above method is 10%. Here, the test pieces were sampled so that the length direction of the test piece was the same as direction I of the front part of the cylindrical portion.

[0103] (Evaluation method) (Time required for waist protection belt wearing operation) Twenty subjects measured the time (seconds) required to wear the lumbar protection belt on the undergarments of the examples and comparative examples using a stopwatch. Each of the twenty subjects was asked to perform the task of wearing the lumbar protection belt three times, and the average of the required time (seconds) for each was calculated. The average for the twenty subjects was taken as the time required for the lumbar protection belt wearing task.

[0104] (Example) (Example 1) A 167 dtex polyethylene terephthalate yarn and a spun yarn of 65% polyester and 35% cotton (by mass ratio) were used for the warp, and a 167 dtex polyethylene terephthalate yarn was used for the weft. The fabric was woven into a double warp twill weave with a warp density of 154 threads / 2.54 cm and a weft density of 64 threads / 2.54 cm to obtain Fabric A for the undergarment body made of 90% polyester and 10% cotton.

[0105] Subsequently, it was knitted using a 78 dtex nylon yarn and a 310 dtex polyurethane elastic fiber to obtain a power net fabric of 82% nylon and 18% polyurethane (hereinafter, this power net fabric is referred to as Fabric D).

[0106] The fabric A for the lower body fabric was used for the lower body fabric, and a lower garment with the appearance shown in FIGS. 1 and 2 and the internal structure shown in FIG. 3 was created. That is, the fabric at the rear part of the cylindrical part in FIG. 3 is the lower body fabric at the waist circumference part of the lower body fabric made of fabric A and located at the back, and the fabric (surface material) at the front part of the cylindrical part is fabric D. Also, only one slit as shown in FIG. 1 was provided at the central part of the front part of the cylindrical part, and the cylindrical part was created such that the ratio (W2 / W1) of the width (W1) of the cylindrical part to the longitudinal width (W2) of the slit was 0.88. Further, the slit is sewn after the edge of the opening of the slit is sandwiched and edged with fabric. Then, a waist protection belt in the form shown in FIGS. 4 and 5 was created, and a molded magic (registered trademark) (manufactured by Kuraray Fastening Co., Ltd.), which is an extrusion molding type as the male surface of the hook-and-loop fastener, and a ring fastener (manufactured by Seiho Co., Ltd.) as the female surface were used for its locking part, and this was designated as the waist protection belt 1. The waist protection belt 1 was attached to the lower garment as shown in FIG. 6 to the above-mentioned cylindrical part, and the time taken at that time was measured. The physical properties of the fabric constituting the cylindrical part and the evaluation results of the lower garment are shown in Table 1.

[0107] (Example 2) A lower body fabric was created using the same fabric A as that used in Example 1, and further, a cylindrical part was created using the same fabric D as that used in Example 1, and a lower garment with the appearance shown in FIGS. 1 and 2 and the internal structure shown in FIG. 3 was created. That is, the fabric at the rear part of the cylindrical part in FIG. 3 is the lower body fabric at the waist circumference part of the lower body fabric made of fabric A and located at the back, and the fabric (surface material) at the front part of the cylindrical part is fabric D. Also, one slit as shown in FIG. 1 was provided at the central part of the front part of the cylindrical part, and the cylindrical part was created such that the ratio (W2 / W1) of the width (W1) of the cylindrical part to the longitudinal width (W2) of the slit was 0.94. The waist protection belt 1 in the form shown in FIGS. 4 and 5 was attached to the lower garment as shown in FIG. 6 to the above-mentioned cylindrical part, and the time taken at that time was measured. The physical properties of the fabric constituting the cylindrical part and the evaluation results of the lower garment are shown in Table 1.

[0108] (Example 3) The lower body fabric was created using the same fabric A as that used in Example 1. Further, the cylindrical part was created using the same fabric D as that used in Example 1, and a lower garment with the appearance shown in FIGS. 1 and 2 and the internal structure shown in FIG. 3 was created. That is, the fabric of the rear part of the cylindrical part in FIG. 3 is the lower garment fabric at the waist circumference part of the lower body fabric composed of fabric A and is located at the back. The fabric (surface material) of the front part of the cylindrical part is fabric D. Also, one slit as shown in FIG. 1 was provided in the central part of the front part of the cylindrical part, and the cylindrical part was created such that the ratio (W2 / W1) of the width (W1) of the cylindrical part to the longitudinal width (W2) of the slit was 0.75. The waist protection belt 1 in the form shown in FIGS. 4 and 5 was attached to the lower garment as shown in FIG. 6 on the above cylindrical part, and the time taken at that time was measured. The physical properties of the fabric constituting the cylindrical part and the evaluation results of the lower garment are shown in Table 1.

[0109] (Example 4) The lower body fabric was created using the same fabric A as that used in Example 1. Further, the cylindrical part was created using the same fabric D as that used in Example 1, and a lower garment with the appearance shown in FIGS. 1 and 2 and the internal structure shown in FIG. 3 was created. That is, the fabric of the rear part of the cylindrical part in FIG. 3 is the lower garment fabric at the waist circumference part of the lower body fabric composed of fabric A and is located at the back. The fabric (surface material) of the front part of the cylindrical part is fabric D. Also, one slit as shown in FIG. 1 was provided in the central part of the front part of the cylindrical part, and the cylindrical part was created such that the ratio (W2 / W1) of the width (W1) of the cylindrical part to the longitudinal width (W2) of the slit was 0.96. The waist protection belt 1 in the form shown in FIGS. 4 and 5 was attached to the lower garment as shown in FIG. 6 on the above cylindrical part, and the time taken at that time was measured. The physical properties of the fabric constituting the cylindrical part and the evaluation results of the lower garment are shown in Table 1.

[0110] (Example 5) Using the same fabric A as that used in Example 1, the lower body fabric was created. Further, using the same fabric D as that used in Example 1, the tubular part was created, and a lower garment with the appearance shown in FIGS. 1 and 2 and the internal structure shown in FIG. 3 was created. That is, the fabric at the rear part of the tubular part in FIG. 3 is the lower garment fabric at the waist circumference part of the lower body fabric made of fabric A and located at the back, and the fabric (surface material) at the front part of the tubular part is fabric D. Also, one slit as shown in FIG. 1 was provided at the central part of the front part of the tubular part, and the tubular part was created such that the ratio (W2 / W1) of the width (W1) of the tubular part to the longitudinal width (W2) of the slit was 1.00. The waist protection belt 1 in the form shown in FIGS. 4 and 5 was attached to the lower garment as shown in FIG. 6 to the tubular part, and the time taken at that time was measured. The physical properties of the fabric constituting the tubular part and the evaluation results of the lower garment are shown in Table 1.

[0111] (Example 6) A tricot was knitted using 44 dtex nylon yarn and 44 dtex polyurethane elastic fiber to obtain a tricot fabric (hereinafter, this tricot fabric is referred to as fabric E) with 70% nylon and 30% polyurethane (by mass ratio). Using the same fabric A as that used in the lower garment of Example 1 and fabric E, a lower garment with the appearance shown in FIGS. 1 and 2 and the internal structure shown in FIG. 3 was created. That is, the fabric at the rear part of the tubular part in FIG. 3 is the lower garment fabric at the waist circumference part of the lower body fabric made of fabric A and located at the back, and the fabric (surface material) at the front part of the tubular part is fabric E. Also, one slit as shown in FIG. 1 was provided at the central part of the front part of the tubular part, and the tubular part was created such that the ratio (W2 / W1) of the width (W1) of the tubular part to the longitudinal width (W2) of the slit was 0.88. The waist protection belt 1 in the form shown in FIGS. 4 and 5 was attached to the lower garment as shown in FIG. 6 to the tubular part, and the time taken at that time was measured. The physical properties of the fabric constituting the tubular part and the evaluation results of the lower garment are shown in Table 2.

[0112] (Example 7) Using 3.3 dtex PTFE fiber for the warp and weft, a 100% PTFE twill fabric (areal density 522 g / m 2It was created and designated as fabric B for the lower body fabric. This fabric B was used for the lower body fabric at the waist circumference part of the lower body fabric on the back, and the same fabric A as that used in Example 1 was used for the other parts of the lower body fabric, and a lower body with the appearance shown in FIGS. 1 and 2 and the internal structure shown in FIG. 3 was created. That is, the fabric at the rear part of the cylindrical part in FIG. 3 is the lower body fabric at the waist circumference part of the lower body fabric composed of fabric B on the back, and the fabric (surface material) at the front part of the cylindrical part is the same fabric D as that used in Example 1. Also, one slit as shown in FIG. 1 was provided at the central part of the front part of the cylindrical part, and the cylindrical part was created such that the ratio (W2 / W1) of the width (W1) of the cylindrical part to the longitudinal width (W2) of the slit was 0.88. The waist protection belt 1 in the form shown in FIGS. 4 and 5 was attached to the lower body as shown in FIG. 6, and the time taken at that time was measured. The physical properties of the fabric constituting the cylindrical part and the evaluation results of the lower body are shown in Table 2.

[0113] (Example 8) A tricot was knitted at 28 gauge using 84 dtex PPT composite fiber and 100% cotton spun yarn to obtain a tricot fabric (hereinafter, this tricot fabric is referred to as fabric F). Using the same fabric A as that used for the lower body in Example 1 and fabric F, a lower body with the appearance shown in FIGS. 1 and 2 and the internal structure shown in FIG. 3 was created. That is, the fabric at the rear part of the cylindrical part in FIG. 3 is the lower body fabric at the waist circumference part of the lower body fabric composed of fabric A on the back, and the fabric (surface material) at the front part of the cylindrical part is fabric F. Also, one slit as shown in FIG. 1 was provided at the central part of the front part of the cylindrical part, and the cylindrical part was created such that the ratio (W2 / W1) of the width (W1) of the cylindrical part to the longitudinal width (W2) of the slit was 0.88. The waist protection belt 1 in the form shown in FIGS. 4 and 5 was attached to the lower body as shown in FIG. 6, and the time taken at that time was measured. The physical properties of the fabric constituting the cylindrical part and the evaluation results of the lower body are shown in Table 2.

[0114] (Example 9) A 100% cotton knitted fabric with silicon dots of 1 mm diameter processed at 1 mm intervals (the coefficient of static friction of the silicon dot processed surface is 0.91) was used as fabric C. This fabric C was used for the lower body fabric at the waist circumference part on the back of the lower body fabric, and the same fabric A as used in Example 1 was used for the other parts of the lower body fabric, and undergarments with the appearance shown in FIGS. 1 and 2 and the inside shown in FIG. 3 were created. That is, the fabric at the rear part of the cylindrical part in FIG. 3 is the lower body fabric at the waist circumference part on the back of the lower body fabric composed of fabric C, and the fabric (surface material) at the front part of the cylindrical part is the same fabric D as used in Example 1. Also, one slit as shown in FIG. 1 was provided at the central part of the front part of the cylindrical part, and the cylindrical part was created so that the ratio (W2 / W1) of the width (W1) of the cylindrical part to the longitudinal width (W2) of the slit was 0.88. The waist protection belt 1 in the form shown in FIGS. 4 and 5 was attached to the undergarment as shown in FIG. 6 to the above cylindrical part, and the time taken at that time was measured. The physical properties of the fabric constituting the cylindrical part and the evaluation results of the undergarment are shown in Table 2.

[0115] (Example 10) An underbody fabric was created using the same fabric A as used in Example 1, and further, a cylindrical part was created using the same fabric D as used in Example 1, and an undergarment with the appearance shown in FIGS. 8 and 2 and the inside shown in FIG. 9 was created. The cylindrical part was made by folding back the same fabric D as in Example 1 at the lower part as shown in FIG. 9 to the underbody fabric, and sewing and fixing the upper part thereof over the entire circumference of the back of the waist circumference part and the lower part thereof partially to the back of the waist circumference part. The fabric at the rear part of the cylindrical part in FIG. 9 is fabric D, and the fabric (surface material) at the front part of the cylindrical part is also fabric D. Also, one slit as shown in FIG. 8 was provided at the central part of the front part of the cylindrical part, and the cylindrical part was created so that the ratio (W2 / W1) of the width (W1) of the cylindrical part to the longitudinal width (W2) of the slit was 0.88. The waist protection belt 1 in the form shown in FIGS. 4 and 5 was attached to the undergarment as shown in FIG. 10 to the above cylindrical part, and the time taken at that time was measured. The physical properties of the fabric constituting the cylindrical part and the evaluation results of the undergarment are shown in Table 2.

[0116] (Example 11) The lower body fabric was created using the same fabric A as that used in Example 1, and further, the cylindrical part was created using the same fabric E as that used in Example 6, and a lower garment in the form shown in FIGS. 8 and 2 on the outside and FIG. 9 on the inside was created. The cylindrical part is made by folding back the same fabric E as in Example 1 at the lower part as shown in FIG. 9 onto the lower body fabric, with its upper part spanning the entire circumference of the back of the waist part and its lower part sewn and fastened partially to the back of the waist part. The fabric of the rear part of the cylindrical part in FIG. 9 is fabric E, and the fabric (facing) of the front part of the cylindrical part is also fabric E. Also, a slit as shown in FIG. 8 was provided at the central part of the front part of the cylindrical part, and the cylindrical part was created such that the ratio (W2 / W1) of the width (W1) of the cylindrical part to the longitudinal width (W2) of the slit was 0.88. The waist protection belt 1 in the form shown in FIGS. 4 and 5 was attached to the lower garment as shown in FIG. 10 to the above cylindrical part, and the time taken at that time was measured. The physical properties of the fabric constituting the cylindrical part and the evaluation results of the lower garment are shown in Table 2.

[0117] (Example 12) The lower body fabric was created using the same fabric A as that used in Example 1, and further, the cylindrical part was created using the same fabric F as that used in Example 8, and a lower garment in the form shown in FIGS. 8 and 2 on the outside and FIG. 9 on the inside was created. The cylindrical part is made by folding back the same fabric F as in Example 1 at the lower part as shown in FIG. 9 onto the lower body fabric, with its upper part spanning the entire circumference of the back of the waist part and its lower part sewn and fastened partially to the back of the waist part. The fabric of the rear part of the cylindrical part in FIG. 9 is fabric F, and the fabric (facing) of the front part of the cylindrical part is also fabric F. Also, one slit as shown in FIG. 8 was provided at the central part of the front part of the cylindrical part, and the cylindrical part was created such that the ratio (W2 / W1) of the width (W1) of the cylindrical part to the longitudinal width (W2) of the slit was 0.88. The waist protection belt 1 in the form shown in FIGS. 4 and 5 was attached to the lower garment as shown in FIG. 10 to the above cylindrical part, and the time taken at that time was measured. The physical properties of the fabric constituting the cylindrical part and the evaluation results of the lower garment are shown in Table 3.

[0118] (Example 13) Using a 30-gauge double jersey knitting machine, 33 dtex polyurethane elastic yarn was prepared on the front needle bed, and 22 dtex / 7 filament nylon raw yarn was prepared on the back needle bed. A warp knitted fabric with a polyurethane elastic yarn content of 53% in a double-sided knitting structure was knitted in the following pattern. Front needle bed: 1-0 / 1-2 / 2-3 / 2-1 / / Back needle bed: 2-3 / 1-1 / 1-0 / 2-2 / / In this way, one side of the double-sided knitting structure forms knit loops only with elastic yarn to form the warp knitted fabric, and the other side forms knit loops by using a combination of elastic yarn and non-elastic yarn to form the warp knitted fabric. A tricot fabric (hereinafter referred to as fabric G) with different static friction coefficients on the front and back, with a static friction coefficient of 0.60 on the front and 0.39 on the back, was obtained.

[0119] An undergarment body fabric was made using the same fabric A as used in Example 1. Further, a tubular part was made using the above-mentioned fabric G, and an undergarment with the appearance shown in Figs. 8 and 2 and the interior shown in Fig. 9 was made. The tubular part is made by folding fabric G downward as shown in Fig. 9 and sewing it to the undergarment body fabric, with its upper part spanning the entire circumference of the back of the waist part and its lower part partially sewn and fastened to the back of the waist part. Due to the characteristics of the fabric, the surface with a static friction coefficient of 0.39 of fabric G is arranged on the inner surface of the rear part of the tubular part, and the surface with a static friction coefficient of 0.60 of fabric G is arranged on the outer surface (the surface close to the human body) of the front part of the tubular part. Also, one slit as shown in Fig. 8 was provided in the central part of the front part of the tubular part, and the tubular part was made such that the ratio (W2 / W1) of the width (W1) of the tubular part to the longitudinal width (W2) of the slit is 0.88. The waist protection belt 1 in the form shown in Figs. 4 and 5 was attached to the undergarment as shown in Fig. 10 on the above-mentioned tubular part, and the time taken at that time was measured. The physical properties of the fabric constituting the tubular part and the evaluation results of the undergarment are shown in Table 3.

[0120] (Example 14) The lower body fabric was created using the same fabric A as that used in Example 1, and further, the cylindrical part was created using the same fabric G as that used in Example 13. An undergarment with the appearance shown in FIGS. 8 and 2 and the internal structure shown in FIG. 9 was created. However, due to the reverse arrangement of the front and back of fabric G and the characteristics of the fabric, the surface with a static friction coefficient of 0.60 of fabric G is arranged on the inner surface of the rear part of the cylindrical part, and the surface with a static friction coefficient of 0.39 of fabric G is arranged on the outer surface (the surface close to the human body) of the front part of the cylindrical part. Also, one slit as shown in FIG. 8 was provided at the central part of the front part of the cylindrical part, and the cylindrical part was created such that the ratio (W2 / W1) of the width (W1) of the cylindrical part to the longitudinal width (W2) of the slit is 0.88. The waist protection belt 1 in the form shown in FIGS. 4 and 5 was attached to the undergarment as shown in FIG. 10 on the above cylindrical part, and the time taken at that time was measured. Table 3 shows the physical properties of the fabric constituting the cylindrical part and the evaluation results of the undergarment.

[0121] (Example 15) The lower body fabric was created using the same fabric A as that used in Example 1, and further, the cylindrical part was created using the same fabric D as that used in Example 1. An undergarment with the appearance shown in FIGS. 20 and 2 and the internal structure shown in FIG. 9 was created. The cylindrical part was made by folding back the same fabric D as in Example 1 at the lower part as shown in FIG. 9 onto the lower body fabric, with its upper part spanning the entire circumference of the back of the waist part and its lower part being sewn and fixed partially to the back of the waist part. The fabric of the rear part of the cylindrical part in FIG. 9 is fabric D, and the fabric (the facing material) of the front part of the cylindrical part is also fabric D. Also, as shown in FIG. 20, the cylindrical part is divided into two equal parts with a 1 cm interval in the center, and the width (W1) of the cylindrical part is equal to the longitudinal width (W2) of the divided part 30 of the cylindrical part, and a cylindrical part with (W2 / W1) being 1.00 was created. The waist protection belt 1 in the form shown in FIGS. 4 and 5 was attached to the undergarment on the above cylindrical part, and the time taken at that time was measured. Table 3 shows the physical properties of the fabric constituting the cylindrical part and the evaluation results of the undergarment.

[0122] (Example 16) Using the same fabric A as that used in Example 1, the lower body fabric was created. Further, using the same fabric A as that used in Example 1, the tubular part was created, and a lower garment with the appearance shown in FIGS. 1 and 2 and the internal structure shown in FIG. 3 was created. That is, the fabric at the rear part of the tubular part in FIG. 3 is the lower garment fabric at the waist circumference part of the lower body fabric made of fabric A and located at the back, and the fabric (surface material) at the front part of the tubular part is also fabric A. Also, one slit as shown in FIG. 1 was provided at the central part of the front part of the tubular part, and the tubular part was created such that the ratio (W2 / W1) of the width (W1) of the tubular part to the longitudinal width (W2) of the slit was 0.88. The waist protection belt 1 in the form shown in FIGS. 4 and 5 was attached to the lower garment as shown in FIG. 6 on the above tubular part, and the time taken at that time was measured. The physical properties of the fabric constituting the tubular part and the evaluation results of the lower garment are shown in Table 3.

[0123] (Example 17) Three non-slip tapes were prepared, which were cloth tapes with a length of 14 cm and a width of 25 mm and had two high-friction bodies continuously arranged from one end to the other end in the longitudinal direction (the static friction coefficient of the surface with a large exposure of 800A elastic yarn manufactured by Ando Tape is 1.07). These non-slip tapes were sewn at three locations in total, namely, at the central part of the back of the waist circumference part of the lower body fabric made of fabric A in the same manner as that used in Example 1 and at positions 8 cm to the left and right from the central part of the back of this waist circumference part. The longitudinal direction of the non-slip tape was made substantially parallel to direction I. Using this lower body fabric and the same fabric D as that used in Example 1, a lower garment with the appearance shown in FIGS. 1 and 2 and the internal structure shown in FIG. 3 was created. The fabric at the rear part of the tubular part in FIG. 3 is the fabric A to which three non-slip tapes are sewn, and the fabric (surface material) at the front part of the tubular part is the same fabric D as in Example 1. Also, one slit as shown in FIG. 1 was provided at the central part of the front part of the tubular part, and the tubular part was created such that the ratio (W2 / W1) of the width (W1) of the tubular part to the longitudinal width (W2) of the slit was 0.88. The waist protection belt 1 in the form shown in FIGS. 4 and 5 was attached to the lower garment as shown in FIG. 6 on the above tubular part, and the time taken at that time was measured. The physical properties of the fabric constituting the tubular part and the evaluation results of the lower garment are shown in Table 3.

[0124] (Comparative Example 1) An undergarment body fabric was created using the same fabric A as that used in Example 1. Further, a tubular portion was created using the same fabric D as that used in Example 1, and an undergarment with the appearance shown in FIGS. 22 and 2 and the internal structure shown in FIG. 9 was created. The tubular portion was made by folding the same fabric D as in Example 1 at the lower part as shown in FIG. 9 and sewing it to the undergarment body fabric. The upper part was sewn and fastened around the entire circumference of the back of the waist part, and the lower part was partially sewn to the back of the waist part. The fabric of the rear part of the tubular portion in FIG. 9 is fabric D, and the fabric (surface material) of the front part of the tubular portion is also fabric D. Also, no slit was provided in the front part of the tubular portion. The waist protection belt 1 in the form shown in FIGS. 4 and 5 was attached to the undergarment, and the time taken for this was measured. Table 4 shows the physical properties of the fabric constituting the tubular portion and the evaluation results of the undergarment.

[0125] The time required for the waist protection belt insertion operation was 25 seconds, and it took time to attach the waist protection belt to the undergarment. As described above, in the undergarment with the structure shown in FIG. 22, it is necessary to insert the waist protection belt from one opening of the tubular portion to the other opening. It is considered that the reason for the time-consuming attachment operation is that the insertion distance of the belt is long.

[0126] (Comparative Example 2) The lower body fabric was created using the same fabric A as that used in Example 1. Further, the cylindrical part was created using the same fabric D as that used in Example 1, and a lower garment with the appearance shown in FIGS. 21 and 2 and the internal structure shown in FIG. 9 was created. The cylindrical part was made by folding back the same fabric D as in Example 1 at the lower part as shown in FIG. 9 onto the lower body fabric, sewing and fixing its upper part over the entire circumference of the back of the waist part, and its lower part partially to the back of the waist part. The fabric of the rear part of the cylindrical part in FIG. 9 is fabric D, and the fabric (surface material) of the front part of the cylindrical part is also fabric D. Also, as shown in FIG. 21, the cylindrical part is provided with two slits. That is, the slits of the cylindrical part continue to the rear part of the cylindrical part, and it has two cylindrical part dividing parts 30 which are one form of the slits. A cylindrical part was created in which the width (W1) of the cylindrical part is equal to the longitudinal width (W2) of the cylindrical part dividing part 30, and (W2 / W1) is 1.00. The waist protection belt 1 in the form shown in FIGS. 4 and 5 was attached to the lower garment, and the time taken for this was measured. Table 4 shows the physical properties of the fabric constituting the cylindrical part and the evaluation results of the lower garment.

[0127] The time required for the waist protection belt insertion operation was 24 seconds, and it took time to attach the waist protection belt to the lower garment. In the lower garment with the structure shown in FIG. 21, the slits of the cylindrical part continue to the rear part of the cylindrical part, and further, it has two cylindrical part dividing parts 30 which are one form of the slits. Therefore, it is necessary to insert the belt through four openings, namely the cylindrical part opening C, the cylindrical part opening D, the cylindrical part opening E, and the cylindrical part opening F, which increases the labor. Further, since each cylindrical part opening can move freely, even when passing the waist support belt through one cylindrical part opening, it is considered that the factor is that it takes labor such as widening the opening by hand when inserting the belt through the other cylindrical part openings.

[0128] (Comparative Example 3) The lower body fabric was created using the same fabric A as that used in Example 1. Further, the cylindrical part was created using the same fabric D as that used in Example 1, and a lower garment with the appearance shown in FIGS. 8 and 2 and the interior shown in FIG. 9 was created. The cylindrical part was made by folding the same fabric D as in Example 1 downward as shown in FIG. 9 and sewing and fixing it to the lower body fabric. The upper part was sewn and fixed across the entire circumference of the back of the waist part, and the lower part was partially sewn and fixed to the back of the waist part. The fabric of the rear part of the cylindrical part in FIG. 9 is fabric D, and the fabric (surface material) of the front part of the cylindrical part is also fabric D. Further, one slit as shown in FIG. 8 was provided in the central part of the front part of the cylindrical part, and the cylindrical part was created such that the ratio (W2 / W1) of the width (W1) of the cylindrical part to the longitudinal width (W2) of the slit was 0.68. The waist protection belt 1 in the form shown in FIGS. 4 and 5 was attached to the lower garment as shown in FIG. 10, and the time taken for this was measured. Table 4 shows the physical properties of the fabric constituting the cylindrical part and the evaluation results of the lower garment.

[0129] The time required for the waist protection belt insertion operation was 21 seconds, and it took time to attach the waist protection belt to the lower garment. In the lower garment with a structure where the ratio (W2 / W1) of the width (W1) of the cylindrical part to the longitudinal width (W2) of the slit is 0.68, the width (W1) of the cylindrical part was not sufficient for the back width of the waist protection belt, and it is considered that the reason was that labor such as manually widening the opening was required when inserting the belt.

[0130] (Comparative Example 4) The lower body fabric was created using the same fabric A as that used in Example 1. Further, the cylindrical part was created using the same fabric D as that used in Example 1, and a lower garment with the appearance shown in FIGS. 1 and 2 and the internal structure shown in FIG. 3 was created. That is, the fabric in the rear part of the cylindrical part in FIG. 3 is the lower garment fabric at the waist circumference part of the lower body fabric composed of fabric A and located at the back, and the fabric (surface material) in the front part of the cylindrical part is fabric D. Also, one slit as shown in FIG. 1 was provided at the center of the front part of the cylindrical part, and the cylindrical part was created such that the ratio (W2 / W1) of the width (W1) of the cylindrical part to the longitudinal width (W2) of the slit was 0.68. The waist protection belt 1 in the form shown in FIGS. 4 and 5 was attached to the lower garment as shown in FIG. 6 to the above-mentioned cylindrical part, and the time taken at that time was measured. The physical properties of the fabric constituting the cylindrical part and the evaluation results of the lower garment are shown in Table 4.

[0131] The time required for the waist protection belt insertion work was 21 seconds, and it took time to attach the waist protection belt to the lower garment. In the lower garment with a structure where the ratio (W2 / W1) of the width (W1) of the cylindrical part to the longitudinal width (W2) of the slit is 0.68, the width (W1) of the cylindrical part is not sufficient for the back width of the waist protection belt, and it is considered that the reason is that labor such as manually widening the opening for inserting the belt occurred.

[0132]

Table 1

[0133]

Table 2

[0134]

Table 3

[0135]

Table 4

Explanation of Signs

[0136] 1: Lower garment 2: Waist circumference part 3: Tubular part 4: Waist circumference direction 5: Lower garment fabric at the back in the waist circumference part 6: Front part of the tubular part 7: Locking part 8: Locking part 9: Waist protection belt 10: Waist protection part 11: Belt part 12: First fixing part 13: Second fixing part 14: Bone 15: Front part of the tubular part 15’: Rear part of the tubular part 16: Locking part 17: Locking part 18: Back part 19: Front 20: Rear 21: Space for arranging the waist protection belt 22: Inner surface of the rear part of the tubular part 23: Outer surface of the front part of the tubular part 24: Lower garment body fabric 25: Slit 26: Slit 27: Surface of the part of the front part of the tubular part far from the human body 28: Cover cloth for the front of the lower garment 29: Button 30: Tubular part dividing part 31: Tubular part opening A 32: Tubular part opening B 33: Tubular part opening C 34: Tubular part opening D 35: Tubular part opening E 36: Tubular part opening F I: Width direction of the tubular part

Claims

**Claim 1** An undergarment having a waist circumference portion, wherein a tubular portion composed of an undergarment body fabric and a surface material different from the fabric or composed of a surface material different from the undergarment body fabric is provided on the back portion of the waist circumference portion and inside the undergarment. The tubular portion is arranged such that its axial direction is parallel to the waist circumference direction of the waist circumference portion. The tubular portion has only one slit that satisfies the following conditions (1) and (2). The slit is provided at the front portion of the tubular portion and substantially at the center in the longitudinal direction of the tubular portion. **(1)** The slit is provided such that the longitudinal direction of the slit is substantially orthogonal to the waist circumference direction. **(2)** The ratio (W2 / W1) of the width (W1) of the tubular portion in the direction orthogonal to the waist circumference direction and the width (W2) of the slit in the longitudinal direction is 0.70 to 0.

98. Here, the substantially central portion in the longitudinal direction of the tubular portion refers to a part of the tubular portion located in the middle when the tubular portion is divided into three equal parts in the longitudinal direction. Also, the longitudinal direction being substantially orthogonal to the waist circumference direction means that the acute angle formed by the longitudinal direction and the direction orthogonal to the waist circumference direction is 0 to 15 degrees. **Claim 2** The undergarment according to claim 1, wherein the static friction coefficient of the inner surface of the rear portion of the tubular portion is 0.2 to 1.0, and the stress at 10% elongation in the width direction of the tubular portion of the front portion of the tubular portion is 10 N / 25 mm or less. **Claim 3** The undergarment according to claim 1 or 2, wherein the static friction coefficient of the surface of the portion of the front portion of the tubular portion far from the human body is 0.2 to 1.

0. **Claim 4** The undergarment according to any one of claims 1 to 3, wherein the static friction coefficient of the surface of the portion of the front portion of the tubular portion close to the human body is 0.2 to 1.

0. **Claim 5** The undergarment according to any one of claims 1 to 4, wherein the tubular portion is composed of an undergarment body fabric and a surface material different from the fabric, and the upper and lower portions of the surface material are continuously or intermittently connected to the undergarment body fabric, respectively. **Claim 6** The undergarment according to any one of claims 1 to 4, wherein the tubular portion is composed of a surface material different from the undergarment body fabric, and the upper and lower portions of the tubular portion are continuously or intermittently connected to the undergarment body fabric, respectively. **Claim 7** The undergarment according to any one of claims 1 to 6, wherein the surface material is a fabric. **Claim 8** The undergarment according to any one of claims 1 to 7, wherein the slit is an elliptical slit. **Claim 9** An undergarment with a belt, comprising the undergarment according to any one of claims 1 to 8 and a waist protection belt.

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