Cloth diaper cover and vertically integrated clothing article

Abstract

A cloth diaper cover (1) used in combination with an absorbent pad or a diaper, said cover having a lengthwise direction, a widthwise direction and a thickness direction which are orthogonal to one another in an opened and extended state, having a main body member (2) and a size adjustment member (10) for adjusting the length of the main body member (2) in the lengthwise direction, and being configured in a manner such that: the size adjustment member (10) has a securing part (11) which is secured to the main body member (2) and an attachment / detachment part (12) which can be attached to and detached from the main body member (2); and the entirety of the securing part (11) is provided in the crotch section, when the two middle regions constitute the crotch section when the cloth diaper cover (1) is divided into four equal parts in the lengthwise direction.

Description

Cloth diaper covers and one-piece top and bottom garments

[0001] The present invention relates to a cloth diaper cover and a one-piece garment.

[0002] "Cloth diaper covers" are known, which are used by attaching an absorbent pad or diaper to the crotch area to absorb excrement such as urine. Patent Document 1 discloses sanitary shorts to be used in conjunction with sanitary napkins. Support shorts are sewn to the outer surface of the rear waistband of the sanitary shorts, and belt loops are provided on the outer surface of the front waistband for passing the joining band of the support shorts through. It is described that the support shorts can therefore press the sanitary shorts and the sanitary napkin together from the outside, stably holding the sanitary napkin in place and preventing menstrual blood leakage.

[0003] Japanese Patent Application Laid-Open No. 2022-201

[0004] The sanitary shorts in Patent Document 1 allow the napkin (absorbent pad or diaper) used in combination to fit snugly against the wearer, thereby preventing leakage of body waste. However, the support shorts are provided all the way from the upper end of the back body (waistband) to the upper end of the front body (waistband), which presses down on the entire sanitary shorts. This causes pressure in areas other than the crotch area where the absorbent pad or diaper should fit snugly, resulting in a decrease in comfort.

[0005] The present invention has been made in consideration of the above-mentioned problems, and its object is to provide a cloth diaper cover and one-piece top and bottom garment that is comfortable to wear while allowing an absorbent pad or diaper to be used in combination with it to fit closely to the crotch area of ​​the wearer.

[0006] The primary invention for achieving the above object is a cloth diaper cover to be used in combination with an absorbent pad or diaper, which, in an unfolded and stretched state, has a longitudinal direction, a width direction, and a thickness direction that are perpendicular to one another, and comprises a main body member and a size adjustment member for adjusting the longitudinal length of the main body member, the size adjustment member having a fixed part fixed to the main body member and a detachable part detachable from the main body member, and when the cloth diaper cover is divided into four equal parts in the longitudinal direction, the two central regions are defined as the crotch region, and the fixed part is entirely located in the crotch region. Other features of the present invention will become apparent from the description of this specification and the accompanying drawings.

[0007] According to the present invention, it is possible to provide a cloth diaper cover and a one-piece top and bottom garment that is comfortable to wear while keeping an absorbent pad or diaper used in combination in close contact with the crotch area of ​​the wearer.

[0008] 9A to 9C are explanatory diagrams of modified examples of the size adjusting member 10. FIG. 9B is an explanatory diagram of a pants-type cloth diaper cover 70. FIG. 9C is an explanatory diagram of a pants-type diaper cover 10. FIG. 9C is an explanatory diagram of a modified example of the size adjusting member 10. FIG. 9C is an explanatory diagram of a pants-type cloth diaper cover 70. FIG. 9C is an explanatory diagram of a pants-type diaper cover 10 ... FIG. 10 is an explanatory diagram of a modified romper 205 in an unfolded and stretched state.

[0009] The present specification and the accompanying drawings make at least the following clear: (Aspect 1) A cloth diaper cover to be used in combination with an absorbent pad or a diaper, which, in an unfolded and stretched state, has a longitudinal direction, a width direction, and a thickness direction that are perpendicular to one another, and which comprises a main body member and a size adjustment member for adjusting the longitudinal length of the main body member, wherein the size adjustment member has a fixed part that is fixed to the main body member and a detachable part that is detachable from the main body member, and wherein, when the cloth diaper cover is divided into four equal parts in the longitudinal direction, the two central regions are defined as the crotch part, and the fixed part is entirely located in the crotch part.

[0010] According to Aspect 1, the size adjustment member can adjust the length of the main body member located in the crotch area of ​​the wearer (the main body member can be pulled while being partially pinched), eliminating slack in the main body member. This allows the absorbent pad or diaper used in combination to fit snugly against the wearer's crotch area (excretory opening). Furthermore, it can prevent areas other than the crotch area, where slack needs to be eliminated, from fitting tighter than necessary to the wearer, improving comfort.

[0011] (Aspect 2) A cloth diaper cover according to aspect 1, wherein the fixed part is fixed to the non-skin side of the main body member, and the detachable part is detachable from the non-skin side of the main body member.

[0012] According to the second aspect, the size adjusting member can be used to easily adjust the looseness of the crotch area after the diaper cover is put on the wearer, thereby making it possible to compensate for any slippage or looseness around the waist when the diaper cover is put on, which also helps to prevent leakage of body excrement.

[0013] (Aspect 3) The cloth diaper cover according to aspect 1 or 2, wherein the size adjusting member is provided across the center of the cloth diaper cover in the longitudinal direction in the unfolded and stretched state.

[0014] According to the third aspect, the size adjustment member can be provided in a region where the main body member is likely to loosen around the crotch area of ​​the wearer. Furthermore, even after the diaper cover is put on the wearer, the size adjustment member can be easily pulled, and looseness in the crotch area can be easily adjusted.

[0015] (Aspect 4) The cloth diaper cover according to any one of Aspects 1 to 3, wherein in the unfolded and extended state, the detachable portion is located closer to the ventral side in the longitudinal direction than the fixed portion.

[0016] According to the fourth aspect, the user can grasp the size adjustment member and pull it toward the abdomen. This makes it easier to adjust the size using the size adjustment member, for example, when a parent or guardian is facing the wearer while putting the diaper cover on. Furthermore, even after the diaper cover is put on the wearer, the size adjustment member can be easily pulled, making it easy to adjust the slack in the crotch area.

[0017] (Aspect 5) The cloth diaper cover according to any one of Aspects 1 to 4, wherein the size adjusting member is provided at the center of the cloth diaper cover in the width direction.

[0018] According to Aspect 5, the slack in the main body member relative to the crotch region of the wearer can be directly eliminated. Furthermore, even after the diaper cover is put on the wearer, the size adjustment member can be easily pulled without getting caught on the wearer's legs, making it easy to adjust the slack in the crotch region.

[0019] (Aspect 6) A cloth diaper cover according to any one of aspects 1 to 5, wherein a hook material is provided on one of the main body member and the detachable portion, and the other of the main body member and the detachable portion can be engaged with the hook material.

[0020] According to Aspect 6, the size adjustment member can be locked simply by abutting the detachable portion against the main body member, and can be detached from the main body member simply by gently pulling on the size adjustment member. Therefore, even after the diaper cover is put on the wearer, the slack in the crotch area can be easily adjusted using the size adjustment member.

[0021] (Aspect 7) The cloth diaper cover according to Aspect 6, wherein the hook member is provided at the attachment / detachment portion.

[0022] According to the seventh aspect, the hook members are less likely to come into contact with the user, which prevents the diaper cover from becoming soft to the touch, and also prevents foreign matter from adhering to the hook members.

[0023] (Aspect 8) A cloth diaper cover according to any one of aspects 1 to 7, wherein, in the unfolded and stretched state, the maximum longitudinal length of the size adjustment member is 13% or more of the longitudinal length at the center of the width of the cloth diaper cover.

[0024] According to the eighth aspect, the size adjusting member occupies a longer length of the diaper cover in the longitudinal direction than when the length of the size adjusting member is less than 13% of the length of the diaper cover, and therefore the slack of the main body member can be adjusted over a wider range in the longitudinal direction of the diaper cover.

[0025] (Aspect 9) A cloth diaper cover according to any one of aspects 1 to 8, wherein, in the unfolded and stretched state, the maximum longitudinal length of the size adjustment member is less than 25% of the longitudinal length at the center of the width of the cloth diaper cover.

[0026] According to the ninth aspect, the position of the crotch portion where slack in the main body member should be eliminated can be adjusted more accurately than when the length of the size adjusting member is 25% or more of the length of the diaper cover.

[0027] (Aspect 10) A cloth diaper cover according to any one of aspects 1 to 9, further comprising a pair of other size adjustment members for adjusting the longitudinal length of the main body member, the pair of other size adjustment members being provided on both sides of the width of the cloth diaper cover.

[0028] According to Aspect 10, the size of the diaper cover (main body member) can be adjusted according to the wearer's body type (leg length). Furthermore, the longitudinal length of the diaper cover can be adjusted with a good balance in the width direction. Therefore, the longitudinal length of the diaper cover can be adjusted in advance using other size adjustment members according to the wearer's body type, and then the diaper cover can be put on the wearer. Furthermore, after the diaper cover is put on, the length of the diaper cover (main body member) can be fine-tuned using the size adjustment members, eliminating looseness in the crotch area and correcting for slippage or looseness around the waist, thereby improving the fit of the diaper cover.

[0029] (Aspect 11) The cloth diaper cover according to Aspect 10, wherein in the unfolded and stretched state, the other size adjusting member is provided closer to the ventral side than the center of the cloth diaper cover in the longitudinal direction.

[0030] According to Aspect 11, it is difficult for other size adjustment members to be positioned under the wearer's body when the wearer is sitting or lying down, which can prevent the wearer from feeling a foreign body sensation, thereby improving the comfort of the diaper cover.

[0031] (Aspect 12) A cloth diaper cover as described in Aspect 10 or 11, wherein, in the unfolded and stretched state, the detachable portion is located on one side of the fixed portion in the longitudinal direction, and the other size adjustment member is located on the one side of the fixed portion in the longitudinal direction.

[0032] According to Aspect 12, the size adjusting member can be engaged with the main body member so as to straddle a portion (e.g., a fold line of the main body member) whose length has been adjusted by another size adjusting member, thereby making it easier to maintain the state in which the length of the main body member has been adjusted to be short even in a portion where no other size adjusting member is located.

[0033] (Aspect 13) A cloth diaper cover according to any one of aspects 10 to 12, wherein the other size adjustment member is a snap button, the snap button has a male button and a female button, and when in an unfolded and stretched state, the region from the center position of the male button in the longitudinal direction to the center position of the female button is defined as a first region, and the region in the longitudinal direction where the fixing portion is located is defined as a second region, the average value of the curvature of the widthwise side edges of the cloth diaper cover in the first region is smaller than the average value of the curvature of the widthwise side edges of the cloth diaper cover in the second region.

[0034] According to aspect 13, the side edges of the diaper cover are curved gently in the areas where the snap buttons are provided. Therefore, when fastening the snap buttons, the main body member can be folded in areas where the change in widthwise length is small. This minimizes the difference in the planar shape of the diaper cover before and after fastening the snap buttons. Furthermore, while the male and female components of a hook-and-loop fastener have a high degree of freedom in their engagement positions and may shift, the engagement positions of male and female buttons are uniquely determined. Therefore, the user can fasten the snap buttons without hesitation. Furthermore, because snap buttons are difficult to undo, the adjusted length of the diaper cover is easily maintained.

[0035] (Aspect 14) A cloth diaper cover according to any one of aspects 1 to 13, wherein the size adjustment member is stretchable in the longitudinal direction, and when the longitudinal length of the size adjustment member in its natural state is 100%, the force required to stretch the size adjustment member 120% in the longitudinal direction is 1 N / 25 mm or less.

[0036] According to Aspect 14, the size adjustment member is more easily stretched than when the force required to stretch it is greater than 1 N / 25 mm. This makes it easier for the user to pull the size adjustment member. In addition, the size adjustment member is more likely to follow the wearer's movements, making it less likely for the size adjustment member to come off the main member.

[0037] (Aspect 15) A cloth diaper cover according to any one of aspects 1 to 14, wherein the size adjustment member is stretchable in the longitudinal direction, and when the longitudinal length of the size adjustment member in its natural state is 100%, the force required to stretch the size adjustment member 120% in the longitudinal direction is less than the engaging force between the main body member and the detachable portion.

[0038] According to Aspect 15, the size adjustment member is more stretchable and can more easily follow the wearer's movements than in the reverse case, while the locking force between the main body member and the detachable part is increased, making it more difficult for the detachable part to come off the main body member.

[0039] (Aspect 16) The cloth diaper cover according to any one of aspects 1 to 15, wherein the air permeability in the thickness direction in the crotch area is 10 m ３ / m ２ / min or more, 100m ３ / m ２ / minute or less.

[0040] According to aspect 16, the air permeability is 10 m ３ / m ２ / min, the diaper cover has better breathability, the inside is less likely to get stuffy, and the comfort of wearing it is improved. ３ / m ２ Compared to when the diaper cover is larger than 1 / min, the strength (durability) of the diaper cover when in use is ensured.

[0041] (Embodiment 17) A cloth diaper cover according to any one of embodiments 1 to 16, which does not have a waterproof layer.

[0042] According to Aspect 17, the dehydration effect during washing is improved. Furthermore, the absence of a waterproof layer also improves breathability, allowing air to easily pass through the cloth diaper cover. This makes it easier to dry after washing. Furthermore, the increased breathability prevents the inside of the cloth diaper cover from becoming stuffy. This improves comfort.

[0043] (Embodiment 18) A cloth diaper cover according to any one of embodiments 1 to 17, wherein a pair of fastening portions are provided at both ends in the width direction of at least one of the longitudinal back and ventral portions.

[0044] According to aspect 18, even if the crotch portion of the main body member becomes loose when worn, the looseness can be eliminated by the size adjustment member.

[0045] (Aspect 19) A one-piece garment having an upper main body portion worn on the upper body and a lower main body portion worn on the lower body, which is used in conjunction with an absorbent pad or diaper, wherein the lower main body portion has a longitudinal direction, a width direction, and a thickness direction that are perpendicular to each other when unfolded and stretched, and comprises a main body member and a size adjustment member that adjusts the longitudinal length of the main body member, the size adjustment member having a fixed portion fixed to the main body member and a detachable portion that can be attached and detached to the main body member, and wherein when the area of ​​the main body member that overlaps with the leg openings in the longitudinal direction is divided into four equal parts in the longitudinal direction, the two central areas are defined as the crotch portion, and the entire fixed portion is located in the crotch portion.

[0046] According to Aspect 19, the size adjustment member can adjust the length of the main body member located in the crotch area of ​​the wearer, eliminating slack in the main body member. This allows the absorbent pad or diaper used in combination to fit snugly against the wearer's crotch area (excretory opening). Furthermore, areas other than the crotch area where slack needs to be eliminated can be prevented from fitting too tightly around the wearer, improving comfort.

[0047] First Embodiment In the first embodiment, a tape-type diaper cover for infants will be described as an example of a cloth diaper cover according to the present invention. However, the present invention is not limited to this. For example, the cloth diaper cover according to the present invention can also be used for pants-type diaper covers, or diaper covers with a tape-type design on one side and a pants-type design on the other side (with leg openings). Furthermore, the wearer of the cloth diaper cover of the first embodiment and the second embodiment described below may be a living being such as an adult or an animal. In the following description, the cloth diaper cover will also be simply referred to as a "diaper cover."

[0048] <<Basic Structure of Diaper Cover 1>> Fig. 1 is a plan view of the diaper cover 1 in an unfolded and stretched state, as seen from the skin side. Fig. 2 is a plan view of the diaper cover 1 in an unfolded and stretched state, as seen from the non-skin side. Fig. 3 is a schematic perspective view of the diaper cover 1 in a worn state.

[0049] The "unfolded state" refers to the state in which the diaper cover 1 is unfolded and laid out flat. In the case of a pants-type diaper cover, this refers to the state in which the joints at both sides (sides) of the front and back panels in the width direction are separated and opened, and the diaper cover is laid out flat. The "stretched state" refers to the state in which the diaper cover 1 is stretched without wrinkles. Specifically, this refers to the state in which the dimensions of the material (e.g., fabric) constituting the diaper cover 1 are stretched to the same length as or close to the dimensions of the material (e.g., fabric) alone.

[0050] In the unfolded and stretched state, the diaper cover 1 has a longitudinal direction, a width direction, and a thickness direction that are perpendicular to one another. In the longitudinal direction, the side that contacts the wearer's abdomen is called the "abdominal side," and the side that contacts the wearer's back is called the "dorsal side." In the thickness direction, the side closest to the wearer's skin is called the "skin side," and the opposite side is called the "non-skin side."

[0051] The diaper cover 1 has a main body member 2 and a size adjustment member 10. In an unfolded and extended state, the main body member 2 has a generally hourglass-shaped planar shape with the longitudinal center portion narrowed inward in the width direction. The size adjustment member 10 is a member for adjusting the longitudinal length of the main body member 2.

[0052] In this specification, in the diaper cover 1 in an unfolded and stretched state, the region closer to the ventral side than the longitudinal center CL is referred to as the ventral side portion 1A, and the region closer to the dorsal side than the longitudinal center CL is referred to as the dorsal side portion 1B. The diaper cover 1 is a tape-type (open type) diaper cover. In the unfolded and stretched state, the dorsal side portion 1B is provided with a pair of fastening portions 3 at both widthwise ends. The fastening portions 3 in FIG. 1 are hook members (male members of a hook-and-loop fastener) equipped with a plurality of fastening protrusions. The fastening portions 3 are detachably fastened to the non-skin side of the ventral side portion 1A. The fastening portions 3 may be fastened directly to the fabric constituting the main body member 2, or may be fastened to a female member of a hook-and-loop fastener provided on the ventral side portion 1A. 3, when the diaper cover 1 is worn, the diaper cover 1 is folded in half approximately at the longitudinal center, and then both widthwise ends of the back portion 1B (hereinafter also referred to as "flap portions 4") are folded inward in the widthwise direction, and the fastening portions 3 are fastened to the non-skin-side surfaces of the abdominal portion 1A. As a result, the diaper cover 1 is formed with a waist opening BH that fits around the wearer's waist and a pair of leg openings LH that fit around the wearer's legs.

[0053] The diaper cover 1 (main body member 2) is made of a reusable cloth fabric (sheet member). Examples of the cloth fabric that constitutes the diaper cover 1 include woven fabrics and knitted fabrics. A woven fabric is a fabric constructed in a flat shape by interlacing weft threads at right angles to a number of parallel warp threads, such as a fabric called a "woven fabric." A knitted fabric is a fabric constructed in a flat shape by looping threads and connecting these loops to other loops, such as a fabric called a "knit." The fibers that constitute the cloth fabric are not particularly limited, and examples include natural fibers such as cotton and silk; synthetic fibers such as polyester, polyurethane, nylon, and acrylic; semi-synthetic fibers such as acetate; and recycled fibers such as rayon. These fibers may be used alone or in combination.

[0054] The diaper cover 1 is used in conjunction with an absorbent pad (not shown) that absorbs urine and other excrement. The absorbent pad is attached to the skin-facing side of the diaper cover 1 so that it abuts the wearer's excretory openings (urinary and fecal openings) when worn. The absorbent pad may be reusable by washing, or may be disposable. Although not provided on the diaper cover 1 in FIG. 1 , the skin-facing side of the diaper cover 1 may be provided with a fastening area (e.g., a hook-and-loop fastener) for removably fastening the absorbent pad, or with a mark indicating the attachment position of the absorbent pad.

[0055] As described above, if the diaper cover 1 is made of cloth, it can be washed and reused (reused repeatedly). Using a reusable diaper cover 1 and a reusable absorbent pad can further reduce waste. On the other hand, using a disposable absorbent pad can reduce the number of washes, thereby easing the burden on users and the environmental impact of washing. Using a disposable absorbent pad reduces waste and the environmental impact compared to using tape-type disposable diapers. While the diaper cover 1 also needs to be washed, the number of washes of the diaper cover 1 can be reduced compared to the number of washes of an absorbent pad, which is replaced and washed after each excretion. In other words, using a disposable absorbent pad in combination with the diaper cover 1 reduces waste while limiting the number of washes, thereby reducing the burden on users and the environmental impact of washing. Furthermore, the diaper cover 1 of this embodiment includes a size adjustment member 10 (described later) and other components, allowing the absorbent pad used in combination to fit snugly against the wearer's crotch area. Therefore, excrement is absorbed by the internal absorbent pad, and excrement is less likely to leak onto the diaper cover 1, clothing, bedding, etc., and these are less likely to be soiled, which reduces the number of times the diaper cover needs to be washed, thereby reducing the burden on the user and the environmental impact of washing.

[0056] 1 , the diaper cover 1 in its unfolded and stretched state includes a "ventral stretchable section 21" stretchable in the longitudinal and width directions and located at the longitudinal end of the ventral side and the widthwise center, a "dorsal stretchable section 41" stretchable in the longitudinal and width directions and located at the longitudinal end of the dorsal side and the widthwise center, a low-stretch section 60 extending continuously in the longitudinal direction from a position adjacent to the ventral stretchable section 21 to a position adjacent to the dorsal stretchable section 41, and leg-around stretchable sections 30 stretchable in the longitudinal and width directions and located adjacent to both widthwise ends of the low-stretch section 60. Furthermore, at least a portion of the boundary B1 between the ventral stretchable section 21 and the low-stretchable section 60 is inclined from the longitudinal end to the widthwise center from the ventral side to the dorsal side.

[0057] Furthermore, the ventral stretchable portion 21 and the dorsal stretchable portion 41 are more stretchable in the width direction than the low-elastic portion 60. In other words, the average value of the force required to stretch the ventral stretchable portion 21 of a unit length in the longitudinal direction to a predetermined length in the width direction, and the average value of the force required to stretch the dorsal stretchable portion 41 of a unit length in the longitudinal direction to a predetermined length in the width direction, are smaller than the average value of the force required to stretch the low-elastic portion 60 of a unit length in the longitudinal direction to a predetermined length in the width direction.

[0058] The ventral stretchable section 21 and the dorsal stretchable section 41 stretch not only in the width direction but also in the length direction, allowing them to easily follow the movement of the wearer's waist. This reduces the feeling of pressure on the wearer's waist, making the diaper cover 1 more comfortable to wear. Furthermore, gaps are less likely to form between the diaper cover 1 and the wearer's waist, preventing leakage of excrement through the waist openings BH. Similarly, the leg stretchable sections 30 also easily fit around the wearer's legs, preventing leakage through the leg openings LH.

[0059] On the other hand, when the diaper cover 1 is worn (e.g., FIG. 3), the low-elasticity portion 60A on the ventral side and the low-elasticity portion 60B on the dorsal side are each pulled outward in the width direction and placed in a taut state. Therefore, the wearer's abdomen and buttocks are supported by the taut low-elasticity portions 60. In particular, the wearer's rounded abdomen (such as the protruding abdomen of an infant) is supported from the crotch side by the low-elasticity portion 60A on the ventral side, so that it is wrapped around the inclined boundary B1. This prevents the diaper cover 1 from shifting position (slipping down) in response to abdominal movement.

[0060] As shown in Figure 1, the low-elasticity sections 60 are generally X-shaped when unfolded. Therefore, when worn (e.g., Figure 3), the ventral and dorsal sections tend to form a continuous ring. This allows the low-elasticity sections 60 to be positioned around the wearer's waist and secured to the wearer's hip bones. This prevents the diaper cover 1 from shifting around the waist. The low-elasticity sections 60 are also kept taut in the widthwise outward and upward directions toward the hip bones, providing support by lifting the abdomen and buttocks.

[0061] One example of a method for differentiating the stretchability of the stretchable portions (21, 30, 41) from the low-stretchable portion 60 is to use fabrics with different stretchability for each portion. The cloth diaper cover 1 can be formed by sewing together the fabric for the stretchable portions (21, 30, 41) and the fabric for the low-stretchable portion 60. Specifically, for woven fabric, a stretchable (easily stretchable) woven fabric can be formed by using highly stretchable yarn (yarn made of elastic fiber) or by changing the yarn density. Because knitted fabric is formed by connecting many loops, deformation of each loop can result in significant stretch with a small force.

[0062] The abdominal stretchable section 21 is stretchable in both the longitudinal and width directions. Specifically, in the region of the abdominal stretchable section 21 where stretchability is primarily exhibited (excluding regions where the fabric is folded over, where seams are formed, where flat elastic is provided, where bias tape is sewn, etc.), the longitudinal and widthwise stretch rates are preferably 120% or more, and more preferably 125% or more. In other words, the longitudinal and widthwise stretch rates of the fabric (stretchable fabric) constituting the abdominal stretchable section 21 are preferably 120% or more, and more preferably 125% or more. The "stretch rate" refers to the ratio (G1 / G0) of the length (G1) after stretching to the length (G0) before stretching when the target area is stretched in the elongation direction (longitudinal or width direction) with a predetermined force. Specifically, a portion of the fabric is cut out as a sample piece from the target area (here, the abdominal stretchable section 21). Alternatively, if the fabric constituting the target area can be prepared, a sample piece is formed from the fabric. The sample piece is rectangular, with a "length in the elongation direction" of 100 mm plus the chuck grip width (approximately 10 mm above and below), and a "width perpendicular to the elongation direction" of 25 mm. However, the size of the sample piece may be appropriately adjusted depending on the size of the target area. Then, using a tensile tester (e.g., Instron Model 5965 or equivalent), the chuck distance is increased at a pulling rate of 100 mm / min, and the elongation percentage is determined when the sample piece is pulled in the elongation direction with a force of 1 N / 25 mm, i.e., a force of 1 N per 25 mm sample width. The initial chuck distance before the test (e.g., 100 mm) corresponds to the length before tension (G0), and the chuck distance when stretched with a predetermined force (1 N / 25 mm) corresponds to the length after tension (G1). Preferably, the elongation is measured for multiple sample pieces (e.g., n=5) and the average value is calculated. The elongation can be calculated similarly for the leg elasticized sections 30 and the back elasticized section 41. The longitudinal elongation of the fabric constituting the leg elasticized sections 30 is preferably 120% or more, and more preferably 125% or more.The widthwise stretch percentage of the fabric constituting the back-side stretchable portion 41 is preferably 120% or more, and more preferably 125% or more. The low-stretch portion 60 may not have widthwise stretchability (the widthwise stretch percentage of the fabric constituting the low-stretch portion 60 may be less than 102%), or may have widthwise stretchability although it is less stretchable and has a lower stretch percentage than the ventral stretchable portion 21.

[0063] However, the diaper cover 1 is not limited to the above, and does not have to have a ventral stretchable section 21 or a dorsal stretchable section 41, and does not have to be made of multiple types of fabric with different stretchability. For example, the diaper cover may be made of a single type of fabric (with a consistent degree of stretchability) and have flat elastic at the edges around the waist and legs.

[0064] <Regarding the size adjusting member 10> Figures 4A and 4B are explanatory diagrams of the adjustment method using the size adjusting member 10. Figure 5 is a plan view showing a portion of the diaper cover 1 in an unfolded and stretched state. Figures 6 and 7 are diagrams showing how the length is adjusted using the snap buttons 50. The left drawings in Figures 6 and 7 are schematic plan views of the diaper cover 1 as seen from the non-skin side, and the right drawings in Figures 6 and 7 are schematic cross-sectional views of the diaper cover 1. Figures 8A and 8B are explanatory diagrams of the fastening position of the size adjusting member 10. Figure 8A is a view as seen from the non-skin side, and Figure 8B is a view as seen from the skin side.

[0065] In this specification, when the diaper cover 1 in an unfolded and stretched state is divided into four equal parts in the longitudinal direction as shown in Figure 2, the first region from the ventral side is referred to as the "ventral end region 1A1." The second region from the ventral side is referred to as the "ventral central region 1A2." The first region from the dorsal side is referred to as the "dorsal end region 1B1." The second region from the dorsal side is referred to as the "dorsal central region 1B2."

[0066] The diaper cover 1 includes a main body member 2 and a size adjustment member 10 for adjusting the longitudinal length of the main body member 2. The size adjustment member 10 includes a fastening portion 11 that is fastened to the non-skin side of the main body member 2 and a detachable portion 12 that is detachable from the non-skin side of the main body member 2. The detachable portion 12 is exemplified by a hook member (e.g., a male member of a hook-and-loop fastener) having a plurality of engaging projections. The fastening portion 11 is exemplified by a portion where the size adjustment member 10 is sewn to the main body member 2. As shown in FIG. 2 , when the diaper cover 1 is in an unfolded and stretched state, if the two central regions (a ventral central region 1A2 and a dorsal central region 1B2) of the diaper cover 1 are defined as the "crotch region" when the diaper cover 1 is divided into four equal parts in the longitudinal direction, the fastening portion 11 is entirely located in the crotch region. In other words, the fastening portion 11 is located in one or both of the ventral central region 1A2 and the dorsal central region 1B2.

[0067] As shown in Fig. 4B, the size adjustment member 10 is a tab member that can be grasped and pulled by a user (such as the wearer or the wearer's guardian). As shown in Fig. 4A, the portion of the size adjustment member 10 closer to the detachable portion 12 than the fixed portion 11 can be separated from the main body member 2, allowing the user to grasp the separated portion. The size adjustment member 10 of this embodiment has a rectangular planar shape and is made of fabric.

[0068] The applicant analyzed the diaper cover 1 in a planar manner while it was being worn and found that the widthwise side edges (edges along the wearer's legs) of the diaper cover 1 required more length than the widthwise central portion (portion that abuts the wearer's crotch area). This is thought to be because the widthwise side edges of the diaper cover 1 are wrapped around the base of the wearer's legs. Therefore, a diaper cover 1 that is formed in a planar manner to fit the length of the wearer's legs is prone to slack in the crotch area when worn.

[0069] The fixing portion 11 of the size adjusting member 10 is provided in the crotch portion (1A2, 1B2) that comes into contact with the crotch portion of the wearer. Therefore, the user can use the size adjusting member 10 to adjust the longitudinal length of the main body member 2 that comes into contact with the crotch portion of the wearer, thereby eliminating slack in the main body member 2.

[0070] Specifically, the user pulls the size adjustment member 10 in the longitudinal direction (the vertical direction of the wearer) and fastens the detachable part 12 at a position closer to the ventral side (waist side) in the longitudinal direction on the non-skin side of the main member 2. By doing so, the main member 2 on the dorsal (rear) side of the fixed part 11 is pulled toward the ventral side, and a portion of the main member 2 is pinched between the fixed part 11 and the detachable part 12, and the longitudinal length of the main member 2 can be adjusted to be shorter.

[0071] By eliminating the slack in the main body member 2 that contacts the crotch area of ​​the wearer, the absorbent pad inside the diaper cover 1 can be tightly fitted to the crotch area (excretory opening) of the wearer, thereby preventing leakage of excrement.

[0072] Furthermore, because the fixed portion 11, which serves as the starting point for pulling the size adjustment member 10, is located in the crotch area, the length of the main body member 2 in the crotch area where slack is desired to be eliminated, can be adjusted. This prevents portions of the main body member 2 other than the crotch area from excessively adhering to the wearer and causing a feeling of pressure on the wearer. For example, the wearer's buttocks and abdomen are rounded. The abdomen, in particular, moves easily with breathing and changes in size with eating, drinking, and excretion. However, with the size adjustment member 10 of this embodiment, the pulling is initiated from the crotch area, preventing a feeling of pressure on the buttocks and abdomen and improving comfort. When the detachable portion 12 is fastened to the crotch area, a feeling of pressure is less likely to be felt. Furthermore, when the detachable portion 12 is fastened to a portion closer to the crotch than the buttocks or abdomen, which move more, the detachable portion 12 is prevented from coming off due to the wearer's movement.

[0073] Furthermore, the size adjustment member 10 is provided on the non-skin side of the main body member 2. Therefore, as shown in FIG. 4B , the wearer can adjust the slack in the crotch area using the size adjustment member 10 while wearing the diaper cover 1. Therefore, the fastening position of the removable portion 12 can be adjusted, and the length of the main body member 2 can be adjusted, depending on the slack of the main body member 2 when actually worn. This prevents the removable portion 12 from being unnecessarily fastened to the waist, which could cause discomfort to the wearer, and improves comfort. Furthermore, since the slack in the crotch area can be adjusted after the diaper cover is worn, it can compensate for any slippage or looseness around the waist during wear, which also helps prevent leakage of body waste. However, the above is not limiting, and the user can also put the diaper cover 1 on the wearer while pinching a portion of the main body member 2 with the size adjustment member 10.

[0074] Furthermore, if a portion of the main body member 2 in the crotch area is pinched using only snap buttons, rather than the tab-shaped size adjustment member 10, it is difficult to fasten the snap buttons while the wearer is wearing the diaper cover 1. On the other hand, if the snap buttons are fastened before putting on the diaper cover 1, it is difficult to accurately eliminate the actual slack in the crotch area. Furthermore, the size adjustment member 10 not only pinches a portion of the main body member 2, but can also pull the main body member 2 behind the fixing portion 11. Therefore, the diaper cover 1 and absorbent pad can be more easily fitted to the wearer's crotch area than when the length is adjusted using only snap buttons.

[0075] The position of the size adjustment member 10 on the main body member 2 and the longitudinal length L10 of the size adjustment member 10 are specified as follows. That is, the unfolded and stretched state of the diaper cover 1 is defined as follows. As shown in FIG. 2 , after the main body member 2 is unfolded and stretched, the size adjustment member 10 is unfolded flatly without wrinkles and engaged with the main body member 2 at the attachment / detachment part 12. This state is defined as the unfolded and stretched state of the diaper cover 1. For example, if the size adjustment member 10 includes rubber, this state is defined as the state in which the size adjustment member 10 is stretched to the extent that wrinkles (contraction) caused by the rubber are eliminated. If the size adjustment member 10 does not include rubber and is made of stretchable fabric, this state is defined as the state in which the size adjustment member 10 is simply unfolded flatly (its natural state or a state roughly close to its natural state).

[0076] As shown in Figure 2, when the diaper cover 1 is in an unfolded and stretched state, the size adjustment member 10 is preferably provided across the longitudinal center CL of the diaper cover 1. This allows the size adjustment member 10 to be provided in a region where the main body member 2 is likely to slacken around the wearer's crotch region. Therefore, by using the size adjustment member 10 to eliminate slack in the main body member 2, the absorbent pad can be closely fitted to the wearer's crotch region. Furthermore, by having the size adjustment member 10 straddle the longitudinal center CL of the diaper cover 1, the size adjustment member 10 can be easily pulled, even after the diaper cover 1 has been put on the wearer, allowing for easy adjustment of slack in the crotch region.

[0077] Furthermore, it is preferable that the detachable portion 12 of the size adjusting member 10 is located on the abdominal side in the longitudinal direction relative to the fixed portion 11. In this case, the user can grasp the size adjusting member 10 and pull it toward the abdominal side. The diaper cover 1 is often changed with the parent or guardian and the wearer facing each other. In particular, the tape-type diaper cover 1 is changed while the wearer is lying down.

[0078] Therefore, the above configuration makes it easier to make adjustments using the size adjusting member 10. Specifically, it becomes easier for parents and others to pull the size adjusting member 10, and it becomes easier to determine the fastening position of the detachable part 12. It also becomes easier to put on and take off the detachable part 12. It also becomes easier for the wearer to put on and take off the diaper cover 1 while looking at the size adjusting member 10. Furthermore, even after the diaper cover 1 is put on the wearer, it is easy to pull the size adjusting member 10, and looseness in the crotch area can be easily adjusted. However, conversely to the above, the detachable part 12 may be provided on the back side in the longitudinal direction relative to the fixed part 11.

[0079] The size adjusting member 10 is preferably provided in the widthwise center of the diaper cover 1. Specifically, when the diaper cover 1 is unfolded and stretched, as shown in Fig. 5, the region S10 overlapping with the size adjusting member 10 in the longitudinal direction is divided into thirds by its maximum width WS10, and the widthwise center 10c of the size adjusting member 10 is located within the central region S10c. Preferably, the entire size adjusting member 10 is located within the central region S10c.

[0080] As mentioned above, the widthwise central portion of the diaper cover 1 is more likely to slacken than the widthwise side portions that are wrapped around the base of the wearer's legs. Therefore, by providing the size adjustment member 10 in the widthwise central portion of the diaper cover 1, slack in the main body member 2 relative to the wearer's crotch area can be directly eliminated. This allows the absorbent pad to be closely fitted to the wearer's crotch area. Furthermore, even after the diaper cover 1 is put on the wearer, the size adjustment member 10 can be easily pulled without getting caught on the wearer's legs, making it easy to adjust slack in the crotch area.

[0081] It is also preferable that the main body member 2 and the detachable portion 12 can be engaged with each other by a hook member. That is, it is preferable that a hook member is provided on one of the non-skin side of the main body member 2 and the detachable portion 12, and that the other of the non-skin side of the main body member 2 and the detachable portion 12 can be engaged with the hook member. The hook member is a member having a plurality of engaging projections, and an example of this is the male member of a hook-and-loop fastener.

[0082] By doing so, the size adjustment member 10 can be locked to the main body member 2 simply by abutting the detachable portion 12 against the non-skin side of the main body member 2. Furthermore, the size adjustment member 10 can be detached from the main body member 2 simply by gently pulling on the size adjustment member 10. Therefore, the size adjustment member 10 can be easily attached and detached with little force. Therefore, even after the diaper cover 1 has been put on the wearer, the size adjustment member 10 can be easily attached and detached, and slack in the crotch area can be easily adjusted. The main body member 2 or the detachable portion 12 may have one or more hook members.

[0083] More preferably, a hook member is provided in the removable portion 12. In this embodiment, the male component of the hook-and-loop fastener is provided on the skin side (the surface facing the main body member 2) of the size adjusting member 10 as the removable portion 12. In this case, the hook member is less likely to come into contact with the user, which prevents a decrease in the feel of the diaper cover 1. Furthermore, because the hook member is not exposed, adhesion of foreign matter to the hook member is also prevented.

[0084] Furthermore, the non-skin side of the main body member 2 in this embodiment is formed of a fabric that can be hooked onto the hook material (male component of the hook-and-loop fastener) of the detachable part 12. In this case, the detachable part 12 can be directly hooked onto the fabric that constitutes the main body member 2, increasing the degree of freedom in the hook-and-loop position of the detachable part 12 relative to the main body member 2. Therefore, the hook-and-loop position of the detachable part 12 can be finely adjusted, and looseness in the crotch area of ​​the main body member 2 can be more reliably eliminated.

[0085] Alternatively, the fabric constituting the main body member 2 may be provided with a target member (for example, a female member of a hook-and-loop fastener having a plurality of loop members) that can be engaged with the hook member of the detachable portion 12. In this case, the engaging position of the detachable portion 12 can be freely adjusted as long as it is within the range of the target member. Therefore, looseness in the crotch portion of the main body member 2 can be more reliably eliminated by fine-tuning the engaging position of the detachable portion 12.

[0086] Alternatively, one of the fabric constituting the main body member 2 and the fabric constituting the size adjustment member 10 may be made of a hook material (a fabric provided with a plurality of tiny locking protrusions). In this case, the main body member 2 and the detachable portion 12 are also included in the form in which they can be locked together by a hook material. Specifically, when the fabric constituting the size adjustment member 10 is made of a hook material, the portion of the size adjustment member 10 other than the fixing portion 11 becomes the detachable portion 12. In this case, it is preferable that the main body member 2 be made of a fabric that can be locked together with the fabric of the size adjustment member 10. Conversely to the above, the fabric constituting the main body member 2 may be made of a hook material (a fabric provided with a plurality of tiny locking protrusions). In this case, it is preferable that the size adjustment member 10 be made of a fabric that can be locked together with the fabric of the main body member 2.

[0087] However, without being limited to the above, for example, the detachable portion 12 of the size adjusting member 10 may be one of a male button and a female button that constitute a snap button. In this case, the other side of the snap button may be provided on a part of the non-skin side of the main body member 2. In this case, too, the detachable portion is detachable from the non-skin side of the main body member 2 (the other side of the snap button). In this case, it is preferable to arrange multiple other sides of the snap buttons in a row in the longitudinal direction on the main body member 2. By doing so, the fastening position of the size adjusting member 10 can be adjusted.

[0088] Furthermore, when the diaper cover 1 is in an unfolded and stretched state, it is preferable that the maximum longitudinal length L10 (Figure 2) of the size adjustment member 10 is 13% or more (L10 ≥ La x 13%) of the longitudinal length La (Figure 1) at the width center C of the diaper cover 1.

[0089] By doing so, the length of the size adjusting member 10 in the longitudinal direction of the diaper cover 1 becomes longer than when the length L10 is less than 13% of the length La. Therefore, the slack of the main body member 2 (the longitudinal length of the main body member 2) can be adjusted over a wide range in the longitudinal direction of the diaper cover 1. Specifically, the detachable part 12 can be fastened at a position further away from the fixed part 11 in the longitudinal direction, thereby increasing the length of the main body member 2 that can be gripped between the fixed part 11 and the detachable part 12. However, the length L10 of the size adjusting member 10 is not limited to the above, and it may be less than 13% of the length La of the diaper cover 1.

[0090] Furthermore, when the diaper cover 1 is in an unfolded and stretched state, the maximum longitudinal length L10 of the size adjustment member 10 may be less than 25% of the longitudinal length La at the width center C of the diaper cover 1 (L10 < La x 25%).

[0091] In this case, the position where slack in the main body member 2 needs to be eliminated can be more accurately adjusted compared to when the length L10 is 25% or more of the length La. In other words, the size adjustment member 10 can be used to guide the user to eliminate slack in the main body member 2 in the crotch area. This allows the internal absorbent pad to be more securely attached to the wearer's crotch area. However, the length L10 of the size adjustment member 10 is not limited to the above, and may be 25% or more of the length La of the diaper cover 1.

[0092] 2, it is preferable that the size adjusting member 10 is located within the crotch portion (the ventral central region 1A2 and the dorsal central region 1B2) of the diaper cover 1 when the diaper cover 1 is in an unfolded and extended state. In this case, too, the position where slack in the main body member 2 should be eliminated can be more accurately adjusted. However, this is not limited to the above, and it is sufficient that at least the fixing portion 10 is located in the crotch portion, and the size adjusting member 10 may extend to the ventral end region 1A1 or the dorsal end region 1B1.

[0093] 2, in the unfolded and extended state, the maximum length W10 of the size adjustment member 10 in the width direction is preferably 25 mm or more. This ensures the width of the size adjustment member 10, making it easier for the user to grasp and pull the size adjustment member 10, compared to when the maximum width W10 is less than 25 mm. However, the maximum width W10 of the size adjustment member 10 is not limited to the above and may be smaller than 25 mm.

[0094] As mentioned above, the length L10 and width W10 of the size adjustment member 10 are the lengths when the member is spread out flat without any wrinkles. For example, in the case of a size adjustment member 10 that includes rubber, the lengths are the lengths when the size adjustment member 10 is stretched to the extent that any wrinkles caused by the rubber are eliminated. In the case of a size adjustment member 10 that does not include rubber but is made of stretchable fabric, the lengths are the lengths when the member is in its natural state or nearly in its natural state.

[0095] Furthermore, it is preferable that the engagement force between the non-skin side of the main body member 2 and the removable portion 12 is 0.2 N or more. This makes it more difficult for the removable portion 12 to come off the main body member 2 than when the engagement force is less than 0.2 N. Therefore, even if the wearer of the diaper cover 1 moves, the size adjustment member 10 tends to maintain the slack in the crotch area. However, the engagement force between the non-skin side of the main body member 2 and the removable portion 12 is not limited to the above and may be less than 0.2 N.

[0096] The engagement strength between the non-skin side of the main body member 2 and the removable portion 12 can be measured using a known method. Comparisons can be made using a tensile tester (e.g., Instron Model 5965 or equivalent). First, the entire size adjustment member 10 and a portion of the main body member 2 (slightly larger than the size adjustment member 10) are cut out from the diaper cover 1. Next, the entire removable portion 12 is lightly attached to the non-skin side of the main body member 2. If necessary, a zipper grip may be formed using fabric tape at the tip of the size adjustment member 10 in the longitudinal direction of the diaper cover 1. Next, a 700 g roller is rolled once (one way) over the engaged main body member 2 and size adjustment member 10 (removable portion 12) in the longitudinal direction of the diaper cover 1 to bond the main body member 2 and the removable portion 12. Next, the end of the main body member 2 in the longitudinal direction of the diaper cover 1 and the end of the size adjusting member 10 on the removable portion 12 side (or a gripping portion made of cloth tape) are clamped by the chucks of the tensile tester (the gripping width is about 10 mm). Next, the distance between the chucks is increased in the direction corresponding to the longitudinal direction of the diaper cover 1 at a constant pulling speed (e.g., 300 mm / min) until the removable portion 12 separates from the main body member 2. The maximum tensile load (N) measured during this time is taken as the locking force.

[0097] In addition to the size adjusting member 10, the diaper cover 1 preferably has a pair of other size adjusting members for adjusting the longitudinal length of the main body member 2. The diaper cover 1 of this embodiment has a pair of snap buttons 50 as the pair of other size adjusting members. The pair of snap buttons 50 may be provided on both widthwise sides of the diaper cover 1, as shown in Fig. 6 .

[0098] This allows the longitudinal length of the diaper cover 1 (main body member 2) to be adjusted in a well-balanced manner in the width direction, as shown in Figures 6 and 7 . This allows the size of the diaper cover 1 to be adjusted according to the wearer's body shape (leg circumference). Furthermore, the difference in the planar shape of the diaper cover 1 before and after adjustment with the snap buttons 50 can be reduced. That is, even after fastening the snap buttons 50, the approximately hourglass-shaped planar shape is maintained, allowing the diaper cover 1 to fit the wearer's body nicely. Therefore, the longitudinal length of the diaper cover 1 (main body member 2) can be adjusted in advance using the snap buttons 50 according to the wearer's body shape before the diaper cover 1 is put on the wearer. Furthermore, after putting on the diaper cover 1, the length of the main body member 2 can be fine-tuned using the size adjustment member 10, eliminating looseness in the crotch area and compensating for slippage or looseness around the waist, thereby improving the fit of the diaper cover 1.

[0099] Specifically, the snap button 50 is composed of a male button 51 and a mating female button 52. The pair of male button 51 and female button 52 are spaced apart in the longitudinal direction and are aligned in the width direction. The recesses and protrusions (engagement portions) of the male button 51 and female button 50 are exposed on the non-skin-facing side of the main body member 2. As shown in FIG. 6 , when the snap buttons 50 are unfastened, the overall longitudinal length of the diaper cover 1 and the length L1 from the ventral end to the dorsal end of the leg stretchable portions 30 in the longitudinal direction are long. On the other hand, as shown in FIG. 7 , by fastening the snap button 50 by engaging the longitudinally aligned male button 51 and female button, a portion of the main body member 2 is folded as shown in the right diagram of FIG. 7 . Therefore, the overall length of the diaper cover 1 in the longitudinal direction and the length L2 from the ventral end to the dorsal end of the leg elastic sections 30 in the longitudinal direction are shorter than the lengths shown in FIG.

[0100] By making the size of the diaper cover 1 adjustable to fit the wearer's body shape, gaps (particularly around the leg openings LH) are less likely to form between the wearer and the diaper cover 1, thereby preventing leakage of body waste. Furthermore, the diaper cover 1 can be used for a long period of time, regardless of the wearer's growth. This allows for more effective use of the washable, reusable cloth diaper cover 1.

[0101] However, without being limited to the above, the diaper cover 1 may not have other size adjustment members, or the other size adjustment members may be members other than the snap buttons 50. For example, the other size adjustment members may be male and female members of a hook-and-loop fastener instead of the snap buttons 50. Alternatively, strings or elastic strings may be provided at the folded portions of the fabric constituting the diaper cover 1, and the length of these strings or elastic strings may be adjusted to adjust the longitudinal length of the diaper cover 1. The number of other size adjustment members may also be one or three or more.

[0102] However, the other size adjustment member is preferably a snap button 50. Unlike the size adjustment member 10, which adjusts the slack in the crotch area, the other size adjustment member adjusts the overall length of the diaper cover 1 (main body member 2). Therefore, whether or not to fasten the snap buttons 50 can be determined based on the wearer's body shape (size) before putting the diaper cover 1 on the wearer. The snap buttons 50 can be easily fastened from both sides of the diaper cover 1 before putting the diaper cover 1 on. Furthermore, the snap buttons 50 have a stronger adhesive strength and are less likely to come off than hook-and-loop fasteners. Therefore, even when the wearer moves during putting on the diaper cover 1 (specifically, when pulling the abdominal portion 1A after placing the diaper cover 1 on the wearer's back), the snap buttons 50 are less likely to come off, and the diaper cover 1 is more likely to remain short. Furthermore, when adjusting the length of the diaper cover 1 with elastic bands or the like, irregular folds are formed when the diaper cover 1 is shortened. In contrast, with snap buttons 50 (Figure 7), the contracted portion of the diaper cover 1 is folded, improving the flatness of the inner surface of the diaper cover 1. This makes it easier to place an absorbent pad inside the diaper cover 1. Furthermore, with hook-and-loop fasteners, the male and female components have a high degree of freedom in their engagement positions, which can lead to misalignment and reduced engagement strength, such as only partial engagement. Furthermore, with elastic bands and the like, it is difficult to determine the required length. Furthermore, adjusting the elastic bands on both sides of the width to the same length is also time-consuming. In contrast, with snap buttons, the mating positions of the male and female buttons are clearly defined. This allows users to fasten the snap buttons without hesitation.

[0103] Furthermore, when the diaper cover 1 is in an unfolded and stretched state (FIG. 1), the snap buttons 50 (other size adjustment members) are preferably located closer to the ventral side than the longitudinal center CL of the diaper cover 1. This prevents the snap buttons 50 from being positioned under the wearer's body when sitting or lying down, preventing the wearer from feeling a foreign body sensation. This improves the comfort of the diaper cover 1.

[0104] Furthermore, when the diaper cover 1 is in an unfolded and stretched state, it is preferable that the snap buttons 50 (other size adjustment members) on one widthwise side overlap with the snap buttons 50 on the other widthwise side. Specifically, it is preferable that at least one of the following conditions be satisfied: the male button 51 on one widthwise side overlaps the male button 51 on the other widthwise side in the longitudinal direction, and the female button 52 on one widthwise side overlaps the female button 52 on the other widthwise side. In this way, it is preferable that the snap buttons 50 on both widthwise sides are positioned approximately equal.

[0105] This allows the length of the diaper cover 1 to be shortened so that the pair of snap buttons 50 folds the diaper cover 1 at the same position in the longitudinal direction. This allows the length of the diaper cover 1 to be adjusted in a well-balanced manner in the width direction. This reduces the difference in the planar shape of the diaper cover 1 before and after adjustment with the snap buttons 50, allowing the diaper cover 1 to fit the wearer's body nicely.

[0106] Furthermore, when the diaper cover 1 is in an unfolded and stretched state, when the detachable portion 12 is positioned on the ventral side (one side) in the longitudinal direction relative to the fixed portion 11, it is preferable that the snap button 50 (another size adjustment member) is positioned on the ventral side (one side) in the longitudinal direction relative to the fixed portion 11.

[0107] In the above case, the snap button 50 is provided on the longitudinal side of the size adjustment member 10, i.e., on the side (ventral side) where the attachment / detachment portion 12 is fastened. Therefore, as shown in FIG. 8A , the size adjustment member 10 can be fastened to the main body member 2 so as to straddle the fold line F1 formed on the non-skin side of the diaper cover 1 when the snap button 50 is fastened. On the opposite side of the fold line F1 (skin side), as shown in FIG. 8B , a portion of the main body member 2 is pinched (folded) to form a tab. By fastening the size adjustment member 10 in this manner, the tab is less likely to unfold. In other words, the size adjustment member 10 can prevent the main body member 2 from unfolding at the portion not fastened by the snap button 50. Therefore, the main body member 2 can be easily maintained in a shortened state over a wide width.

[0108] More preferably, the size adjustment member 10 is positioned so as not to overlap the snap buttons 50 in the width direction, but to be offset from the widthwise positions of the snap buttons 50. Specifically, the size adjustment member 10 is preferably provided between a pair of snap buttons 50 provided on both sides of the diaper cover 1 in the width direction. In this way, the size adjustment member 10 can prevent the main body member 2 from opening in the areas not fastened by the snap buttons 50.

[0109] 5, when the diaper cover 1 is in an unfolded and stretched state, the region from the center of the male button 51 to the center of the female button 52 in the longitudinal direction is defined as a first region R1, and the region in the longitudinal direction where the fixing portion 11 of the size adjuster 10 is located is defined as a second region R2. Preferably, the average curvature of the widthwise side edges 1s of the diaper cover 1 (the side edges 1s from p1 to p2) in the first region R1 is smaller than the average curvature of the widthwise side edges 1s of the diaper cover 1 (the side edges 1s from p3 to p4) in the second region R2. If the longitudinal positions of the snap buttons 50 on one side in the width direction are misaligned from those of the snap buttons 50 on the other side, the first region R1 is determined based on the longitudinal position of the snap button 50 on one side in the width direction.

[0110] In other words, it is preferable that the side edge 1s of the diaper cover 1 in the region R1 where the snap buttons 50 are provided bend gently. This allows the main body member 2 to be folded in a region where the change in widthwise length is small when the snap buttons 50 are fastened. This reduces the difference in the planar shape of the diaper cover 1 before and after adjustment with the snap buttons 50, allowing the diaper cover 1 to fit the wearer's body neatly.

[0111] The comparison of the average values ​​of the curvature of the side edges 1s of the diaper cover 1 may be performed visually or based on image data of the unfolded and stretched diaper cover 1. Specifically, regions R1 and R2 are identified in the image data, and image analysis software or the like is used to detect the side edges 1s (edges) of the diaper cover 1 in each region R1 and R2, and the average values ​​of the curvature are calculated and compared based on the edges.

[0112] It is also preferable that the size adjustment member 10 is stretchable in the longitudinal direction. Specifically, when the longitudinal length of the size adjustment member 10 in its natural state (unstretched, unloaded state) is taken as 100%, it is desirable that the force required to stretch the size adjustment member 10 by 120% in the longitudinal direction be 1 N / 25 mm or less.

[0113] This makes it easier for the size adjustment member 10 to stretch than when the force required to stretch it is greater than 1 N / 25 mm. This makes it easier for the user to pull the size adjustment member 10. Furthermore, since the size adjustment member 10 can more easily follow the wearer's movements, the detachable portion 12 of the size adjustment member 10 is less likely to come off the main body member 10.

[0114] Examples of methods for imparting stretchability to the size adjustment member 10 include forming the size adjustment member 10 from a stretchable fabric (for example, the fabric that constitutes the aforementioned ventral stretch portion 21), or attaching rubber that is stretched in the longitudinal direction to the fabric that constitutes the size adjustment member 10.

[0115] The force required to stretch the size adjusting member 10 by 120% can be measured using a tensile tester (e.g., Instron Model 5965 or equivalent). First, the maximum longitudinal length and maximum width length of the size adjusting member 10 in its natural state are measured. Without cutting the size adjusting member 10 out of the diaper cover 1, one chuck of the tensile tester is used to grip the fixed portion 11 of the size adjusting member 10, and the other chuck is used to grip the end of the size adjusting member 10 near the attachment / detachment portion 12 (the gripping margin of the chuck is approximately 10 mm). The distance between the chucks is then increased in the direction corresponding to the longitudinal direction of the diaper cover 1 at a tensile speed of 100 mm / min. The distance between the chucks is increased by 120% (or 130%) of the length of the size adjusting member 10 in its natural state. The tensile load (N) at 120% stretch is then obtained. The tensile load (N) can be compared to 1N / 25mm by converting it to a value for 25mm width (N / 25mm) from the maximum length of the size adjustment member 10 in the width direction of the diaper cover 1 in its natural state.

[0116] Furthermore, when the size adjustment member 10 is stretchable in the longitudinal direction as described above, it is preferable that the following be true: When the longitudinal length of the size adjustment member 10 in its natural state (unstretched, unloaded state) is taken as 100%, the force required to stretch the size adjustment member 10 by 120% in the longitudinal direction is preferably smaller than the locking force between the non-skin side of the main member 2 and the detachable part 12.

[0117] By doing so, the size adjustment member 10 is more stretchable and more easily follows the wearer's movements than in the reverse case, while the retaining force between the main member 2 and the removable portion 12 is increased. This makes it more difficult for the removable portion 12 to come off the main member 2, and the size adjustment member 10 helps to maintain the crotch area in a balanced state. The force (N / 25 mm) required to stretch the size adjustment member 10 by 120% is obtained by converting the tensile load (N) measured by the above-mentioned method into a value for a 25-mm width from the maximum length of the size adjustment member 10 in its natural state in the width direction of the diaper cover 1. The retaining force (N / 25 mm) between the non-skin side of the main member 2 and the removable portion 12 is also obtained by converting the retaining force (N) measured by the above-mentioned method into a value for a 25-mm width from the maximum length of the removable portion 12 in its natural state in the width direction of the diaper cover 1.

[0118] The diaper cover 1 of this embodiment is made of a single layer of fabric, excluding the folded-over end portions. This allows for high air permeability in the thickness direction. Specifically, the crotch area (the ventral central region 1A2 and the dorsal central region 1B2) located under the wearer's crotch when worn has an air permeability of 10 m / s. ３ / m ２ / min or more, 100m ３ / m ２ / min or less is preferable.

[0119] This will increase the air permeability to 10m ３ / m ２ / min, the diaper cover 1 has better breathability and the inside of the diaper cover 1 is less likely to become stuffy. In particular, stuffiness in the crotch area where the absorbent pad absorbs excrement can be suppressed, improving comfort. ３ / m ２ / min or more, the strength (durability) of the diaper cover 1 during use is ensured. For example, the diaper cover 1 is less likely to be damaged even after repeated washing, allowing the diaper cover 1 to be used for a long period of time. However, the diaper cover 1 is not limited to the above, and may have a configuration in which multiple fabrics are layered in the thickness direction, or the breathability may be outside the above range.

[0120] The air permeability can be measured using a KES-F8-AP1 air permeability tester manufactured by Kato Tech Co., Ltd. First, a sample is cut out from the target area of ​​the diaper cover 1, for example, with a size of approximately 100 mm in the longitudinal direction x 100 mm in the transverse direction. Next, the sample is set in the air permeability tester, and the air resistance value is measured. The air resistance value is then calculated as the air permeability (m ３ / m ２ The average value of the air permeability measured for a number of different samples (for example, five samples) is used.

[0121] The diaper cover 1 is also used in combination with an absorbent pad. For this reason, it is preferable that the diaper cover 1 does not have a waterproof layer. This improves the dehydration effect during washing. The absence of a waterproof layer also improves breathability, allowing air to easily pass through the diaper cover 1. This makes it easier for the diaper cover 1 to dry after washing. This further reduces displacement of the diaper cover 1. Furthermore, the diaper cover 1 has good breathability, making it less likely for the inside of the diaper cover 1 to become stuffy. This improves comfort when worn.

[0122] Examples of waterproof layers include fabrics (sheet members) made of non-hydrophilic fibers such as polyethylene (PE), polypropylene (PP), ethylene-vinyl acetate copolymer (EVA), and polyethylene terephthalate (PET), and hydrophilic fabrics that have been treated with a water-repellent coating.

[0123] Furthermore, the diaper cover 1 is preferably tape-type, and a pair of fastening portions 3 are provided at both widthwise ends of at least one of the back-side portion 1B and the ventral-side portion 1A in the longitudinal direction. As described above, the diaper cover 1 of this embodiment has hook-and-loop fastener male members provided as fastening portions 3 on both widthwise ends (skin-facing side) of the back-side portion 1B. Alternatively, one of the widthwise ends of the back-side portion 1B and the widthwise end of the ventral-side portion 1A may be made of a fabric (fastening portion) having a plurality of minute fastening protrusions, and the other may be made of a fabric (fastening portion) that can be fastened to the fabric. In this case, both widthwise ends of the ventral-side portion 1A and the back-side portion 1B can be fastened to each other, thereby forming a waist opening BH.

[0124] In the case of the tape-type (open-type) diaper cover 1 described above, the back section 1B is placed under the sleeping wearer, and then the diaper cover 1 is folded in half approximately in the center, with the ventral section 1A placed against the wearer's abdomen. Therefore, compared to pants-type diaper covers, in which the internal absorbent pad is pulled up to fit snugly against the wearer's crotch area, there is a risk of slack in the crotch area. Even in this case, the size adjustment member 10 can eliminate slack. Therefore, the size adjustment member 10 is more effectively utilized in the case of tape-type diaper covers 1.

[0125] 9A to 9C are explanatory diagrams of modified examples of the size adjustment member 10. The number of size adjustment members 10 is not limited to one, and multiple size adjustment members 10 (two in this case) may be arranged side by side in the width direction as shown in Fig. 9A. In this case, the slack in the crotch area can be finely adjusted depending on the position in the width direction.

[0126] Furthermore, the planar shape of the size adjustment member 10 is not limited to a rectangular shape. For example, as shown in Fig. 9B, it may be a generally triangular shape with a narrow end on the detachable portion 12 side. In this case, the user can easily grasp and pull the narrow end portion. Meanwhile, the thick base portion can be used to pull the rear portion of the size adjustment member 10 over a wide range in the width direction, preventing loosening in the crotch area.

[0127] Furthermore, the size adjustment members 10 do not necessarily have to be provided along the longitudinal direction. For example, as shown in Fig. 9C, two size adjustment members 10 may be provided along a direction inclined relative to the longitudinal direction. In this case, the main body member 2 is pulled in an X-shape, which can prevent slack in the crotch area.

[0128] 10 is an explanatory diagram of a pants-type cloth diaper cover 70. As shown in the figure, a size adjustment member 10 may be provided in the crotch region of the pants-type cloth diaper cover 70. Specifically, when the pants-type cloth diaper cover 70 is unfolded and stretched (not shown), the entire fastening portion 11 of the size adjustment member 10 may be provided in the crotch region, which is the central two regions when the pants-type cloth diaper cover 70 is divided into four equal parts in the longitudinal direction. In this case, too, after the pants-type cloth diaper cover 70 is pulled up and put on, the size adjustment member 10 can be pulled and engaged with the non-skin side of the main member 71 to eliminate slack in the crotch region.

[0129] While the above examples have been described in which the tape-type cloth diaper cover 1 and the pants-type cloth diaper cover 70 are used in combination with absorbent pads, the cloth diaper covers 1, 70 can also be used in combination with diapers. Specifically, examples of diapers include disposable tape-type diapers, disposable pants-type diapers, and disposable diapers with a tape-type design on one side and a pants-type design on the other. When the above cloth diaper covers 1, 70 are used in combination with diapers, the same effects can be obtained as when they are used in combination with absorbent pads.

[0130] Second Embodiment Fig. 11 is a perspective view showing the pants-type diaper cover 100 being worn. Fig. 12 is a schematic plan view of the pants-type diaper cover 100 in a vertically unfolded state, viewed from the skin side. In the first embodiment, a brief-shaped, tape-type or pants-type cloth diaper cover 1, 70 (Figs. 3 and 10) was used as an example of the cloth diaper cover, but the shape of the cloth diaper cover is not limited to this. In the second embodiment, a pants-type diaper cover 100 is used as an example of the cloth diaper cover.

[0131] When worn, the pants-type diaper cover 100 has a vertical direction, a width direction, and a front-to-rear direction that are perpendicular to one another, and is provided with a waist opening BH and a pair of leg openings LH. As shown in Figure 12, when the pants-type diaper cover 100 is unfolded and stretched, it has a longitudinal direction, a width direction, and a thickness direction that are perpendicular to one another. The longitudinal direction corresponds to the vertical direction when worn. In the thickness direction, the inner side closest to the wearer's skin is also referred to as the skin side, and the opposite outer side is also referred to as the non-skin side.

[0132] The pants-type diaper cover 100 includes main body members 110, 120 and a size adjustment member 130. The main body members 110, 120 each include a pants-shaped outer portion 110 and a supporter portion 120. The supporter portion 120 is provided on the inner side (skin side in the thickness direction) of the outer portion 110 and has a support surface (skin side) 120s for supporting an absorbent pad or a diaper. Therefore, the pants-type diaper cover 100 can be used in combination with an absorbent pad or a diaper. The outer portion of the main body member is not limited to a pants-like shape (including a culottes-like shape) and may also be a skirt-like shape. Although the outer portion 110 illustrated in FIG. 11 is shorts, it may also be long pants.

[0133] 12, the "opened state" of the pants-type diaper cover 100 is a state in which both widthwise side portions of the pants-type diaper cover 100 are separated and the pants-type diaper cover 100 is opened flat in the front-to-back direction (up-and-down direction). If the widthwise side portions of the pants-type diaper cover 100 are releasably engaged by engaging portions, the pants-type diaper cover 100 is separated by removing the engaging portions. If the side portions are sewn together, the side portions are cut with scissors or the like to separate the pants-type diaper cover 100.

[0134] The "stretched state" of the pants-type diaper cover 100 refers to the state in which the pants-type diaper cover 100 is stretched without wrinkles. For portions made of stretchable fabric, this refers to a state in which the diaper cover 100 is unfolded without any load and wrinkles are eliminated. For portions of the fabric with elastic members attached, this refers to a state in which the fabric is stretched to remove any wrinkles caused by the elastic members, i.e., until the dimensions of the fabric match or are close to the dimensions of the fabric itself. However, if the outer portion 110, which is pants-shaped, is sewn three-dimensionally and has portions that cannot be unfolded flat (e.g., leg openings), a portion of the outer portion 110 may be loose. Furthermore, even if the supporter portion 120 and the outer portion 110 have different vertical (longitudinal) lengths, with the supporter portion 120 being shorter, the outer portion 110 is stretched in the longitudinal direction to prevent slack. However, if the supporter part 120 has low longitudinal stretchability, the outer part 110 and the supporter part 120 are stretched in the longitudinal direction until the stretchability of the supporter part 120 reaches its limit, and at this time, part of the outer part 110 may be loose. Furthermore, although not shown, in the case of a skirt-type cloth diaper cover (the outer part has a skirt shape), the state in which the supporter part is stretched in the longitudinal direction is considered to be the stretched state of the skirt-type diaper cover.

[0135] A cloth diaper cover with a trouser- or skirt-shaped outer part 110 is easier to use as loungewear or going out wear than the briefs-shaped cloth diaper cover 1, 70 of the first embodiment. This means that there is no need to wear additional clothing on the outside of the trouser-type diaper cover 100, simplifying the donning process and facilitating the changing of absorbent pads and diapers.

[0136] Furthermore, the main body members 110, 120 can be unfolded in the front-to-rear direction at both widthwise side portions. As shown in Figure 11, the outer portion 110 has engagement portions 113, 114 on both widthwise sides that allow the front body portion 111 and the back body portion 112 to overlap and detachably engage with each other. Examples of engagement portions include hook-and-loop fasteners (113) and snap buttons (114), but are not particularly limited thereto.

[0137] On the other hand, the supporter part 120 has both widthwise sides, front and rear, that are not connected together even when worn. In the unfolded state, the supporter part 120 has a shape where the longitudinal center is narrowed inward in the widthwise direction (a so-called hourglass shape). However, like the outer part 110, the supporter part 120 may also be configured so that both widthwise sides are removable, or may have a boxer shape with long sides.

[0138] With the pants-type diaper cover 100, the diaper cover is put on by placing an absorbent pad on the unfolded supporter part 120 (support surface 120s), placing the pants-type diaper cover 100 under the back of a wearer lying on their back, folding it in half, and engaging the engaging parts 113, 114. Alternatively, the pants-type diaper cover 100 can be put on by placing it under the back of a wearer lying on their back.

[0139] The size adjustment member 130 has a fixed part 131 that is fixed to the supporter part 120 (non-skin side), which is a part of the main body member, and a detachable part 132 that is detachable from the supporter part 120 (non-skin side), which is also a part of the main body member. The size adjustment member 130 is sewn to the supporter part 120 at the fixed part 131 or adhered with an adhesive.

[0140] Furthermore, when the pants-type diaper cover 100 is in an unfolded and stretched state (Figure 12), if the two central regions (R102, R103) of the pants-type diaper cover 100 (cloth diaper cover) are divided into four equal parts in the longitudinal direction, the entire fixing portion 131 is located in the crotch portion (R102, R103).

[0141] As described above, the user can pull the size adjustment member 130 in the longitudinal direction (the vertical direction of the wearer) to engage the detachable portion 132 at a position on the non-skin side of the supporter portion 120 that is closer to the ventral side in the longitudinal direction (opposite the fixed portion 131). Therefore, the user can pull the supporter portion 120, which is closer to the back (rear) side of the fixed portion 131, toward the ventral side, while pinching a portion of the supporter portion 120 between the fixed portion 131 and the detachable portion 132. In other words, the size adjustment member 130 allows the longitudinal length of the supporter portion 120 (main body member) that supports the absorbent pad or diaper to be adjusted. This eliminates slack in the portion of the supporter portion 120 that abuts the wearer's crotch area, allowing the absorbent pad or diaper to fit snugly against the wearer's crotch area and reducing leakage of body waste. Furthermore, this prevents areas other than the crotch area from fitting too tightly to the wearer, improving comfort.

[0142] The size adjusting member 130 of the second embodiment may have the same features (configuration, arrangement, length, etc.) as the size adjusting member 10 of the first embodiment, but a detailed description of the common features will be omitted. For example, the size adjusting member 130 may be provided in the widthwise center of the pants-type diaper cover 100, straddling the longitudinal center CL of the pants-type diaper cover 100. The detachable portion 132 may be provided closer to the ventral side than the fixed portion 131, and may include a hook member or the size adjusting member 130 may be stretchable in the longitudinal direction. The size adjusting member 10 of the modified first embodiment ( FIGS. 9A to 9C ) may also be used in the pants-type diaper cover 100. Although not shown, the supporter portion 120 may be provided with the snap buttons 50 (other size adjusting member) of the first embodiment.

[0143] Furthermore, the outer portions 110 are expandable in the front-to-rear direction at their widthwise side portions. Therefore, even after the pants-type diaper cover 100 is worn, the size adjustment members 130 can be easily pulled and the length of the supporter portions 120 can be easily adjusted by removing the engaging portions 114 at the hem and opening the front body portion 111 and the back body portion 112. Note that the outer portions 110 are not limited to being expandable on both widthwise side portions, and only one widthwise side portion may be expandable, which also makes it easier to pull the size adjustment members 130. However, this is not limited to the above, and both widthwise side portions of the outer portions may be inseparably connected.

[0144] Third Embodiment In the third embodiment, a romper for infants will be described as an example of the "one-piece top and bottom garment" according to the present invention. The wearer of the one-piece top and bottom garment is not limited to children (infants, etc.), but may also be an adult. In the following description, the one-piece top and bottom garment will also be referred to as a "romper." Fig. 13 is a perspective view showing the romper 200 being worn. Fig. 14 is an explanatory diagram of the romper 200 in an unfolded and stretched state. Fig. 14 shows a plan view of the romper 200 as seen from the skin side and a cross-sectional view of the area around the size adjustment member 230.

[0145] The romper 200 includes an upper main body portion 210 worn on the upper body and a lower main body portion 220 worn on the lower body. The lower main body portion 220 has a longitudinal direction, a width direction, and a thickness direction that are perpendicular to each other when unfolded and stretched. The lower main body portion 220 also includes main body members 221 and 222 and a size adjustment member 230. The main body members 221 and 222 each include a briefs-shaped outer portion 221 and a supporter portion 222. The supporter portion 222 is located on the inner side (skin side in the thickness direction) of the outer portion 221 and has a support surface (skin side) 222s for supporting an absorbent pad or diaper. Therefore, the romper 200 can be used in combination with an absorbent pad or diaper. The shape of the outer portion 221 is not limited to a briefs-like shape, and may be, for example, a trousers-like or skirt-like shape.

[0146] The "unfolded state" of the lower main body portion 220 refers to a state in which both widthwise sides of the lower main body portion 220 are separated and opened in a planar manner in the front-to-back direction (up-and-down direction), similar to the pants-type diaper cover 100 of the second embodiment. Similarly, the "stretched state" of the lower main body portion 220 refers to a state in which the lower main body portion 220 is stretched without wrinkles, similar to the pants-type diaper cover 100 of the second embodiment. Although not shown, if the outer portion has a pants-like shape or the like and is sewn three-dimensionally, portions that cannot be unfolded in a planar manner may be loose. Furthermore, even if the longitudinal length of the supporter portion 222 is shorter than that of the outer portion 221, the outer portion 221 is stretched in the longitudinal direction so as not to slacken. However, if the supporter portion 222 has low longitudinal stretchability, the outer portion 221 and the supporter portion 222 are stretched in the longitudinal direction until the stretchability of the supporter portion 222 reaches its limit, and a portion of the outer portion 221 may be loose.

[0147] The upper body portion 210 has a sleeveless running shirt shape and includes a neck opening NH and a pair of arm openings AH. The upper body portion 210 can be unfolded in the front-to-back direction at both widthwise side portions (armpits), with the front body portion 211 and the back body portion 212 unfolding side by side in the up-down direction. Each armpit portion of the front body portion 211 and the back body portion 212 is provided with an engagement portion 201 (e.g., a snap button) that detachably engages the armpit portions. However, the shape of the upper body portion 210 is not limited to a running shirt shape and may be, for example, a shape with sleeves.

[0148] The lower main body portion 220 is integrated with the upper main body portion 210 at the rear in the front-to-rear direction. Furthermore, an engagement portion 202 (e.g., a snap button) that detachably engages the hem of the front body portion 211 of the upper main body portion 210 with the lower main body portion 220 prevents the upper main body portion 210 from rolling up. The outer portion 221 of the lower main body portion 220 is deployable in the front-to-rear direction at both widthwise sides. In the deployed state, the outer portion 221 has a shape in which the longitudinal center is narrowed inward in the widthwise direction (a so-called hourglass shape). Furthermore, engagement portions 203 (e.g., a hook-and-loop fastener) are provided at both widthwise ends of the waist portion of the outer portion 221 to detachably engage the front waist portion with the rear waist portion.

[0149] Even when the supporter part 222 is worn, both widthwise sides of the front and rear parts are not connected. In the unfolded state, the supporter part 222 has a shape in which the longitudinal center part is narrowed inward in the widthwise direction (a so-called hourglass shape).

[0150] When putting on the romper 200, the user places an absorbent pad on the supporter portion 222 (support surface 222s) of the romper 200 in the unfolded state (FIG. 14) and lies the wearer on their back on the romper 200. Then, the user passes the wearer's head through the neck opening NH of the upper main body portion 210, folds the front body portion 211 downward, and engages the engaging portion 201. Next, the user folds the lower main body portion 220 in half and engages the engaging portion 203, thereby completing the donning process. Alternatively, the romper 200 can be put on by having a wearer wearing a diaper lie on their back on the unfolded romper 200.

[0151] The size adjustment member 230 has a fixed portion 231 fixed to the supporter portion 222 (non-skin side) which is a part of the main body member, and a detachable portion 232 which is detachable from the supporter portion 222 (non-skin side) which is also a part of the main body member. The size adjustment member 230 is sewn to the supporter portion 222 at the fixed portion 231 or adhered with an adhesive to the supporter portion 222. In addition, when the region RLh which overlaps with the leg openings in the main body members 221, 222 in the unfolded and stretched state of the lower main body portion 220 is divided into four equal parts in the longitudinal direction, and the two central regions R202, R203 are defined as the crotch portion, the entire fixed portion 231 is provided in the crotch portion (R202, R203).

[0152] The region RLh is a region that longitudinally overlaps with the portion that forms the leg openings LH when the garment is worn (FIG. 13). In the case of the romper 200 shown in FIG. 14, the region RLh corresponds to the region that longitudinally overlaps with the portion of the main body members 221, 222 that is located on the crotch side of the waist portion where the engagement portion 203 is provided.

[0153] As described above, the user can pull the size adjustment member 230 in the longitudinal direction (the vertical direction of the wearer) to engage the detachable portion 232 at a position on the non-skin side of the supporter portion 222 that is closer to the ventral side in the longitudinal direction (opposite the fixed portion 231). Therefore, the user can pull the supporter portion 222, which is closer to the back (rear) side of the fixed portion 231, toward the ventral side, while pinching a portion of the supporter portion 222 between the fixed portion 231 and the detachable portion 232. In other words, the size adjustment member 230 allows the longitudinal length of the supporter portion 222 (main body member) that supports the absorbent pad or diaper to be adjusted. Furthermore, it eliminates slack in the portion of the supporter portion 222 that abuts the wearer's crotch area, allowing the absorbent pad or diaper to fit snugly against the wearer's crotch area and reducing leakage of body waste. Furthermore, it prevents areas other than the crotch area from fitting too tightly to the wearer, improving comfort.

[0154] FIG. 15 is an explanatory diagram of a modified romper 205 in an unfolded and stretched state. FIG. 15 shows a plan view of the romper 205 from the non-skin side and a cross-sectional view of the periphery of the size adjustment member 230. Components common to the romper 200 and the modified romper 205 are designated by the same reference numerals and will not be described further. The lower main body portion 220 of the modified romper 205 does not have a supporter portion. Therefore, the fixed portion 231 of the size adjustment member 230 is fixed to the outer portion 221 (non-skin side), and the detachable portion 232 is detachably attached to the outer portion 221 (non-skin side). Furthermore, the entire fixed portion 231 is provided in the crotch area, which is the two central regions R202 and R203 when the region RLh longitudinally overlapping the leg openings in the main body member (outer portion 221) is divided into four equal parts in the longitudinal direction. In this case, the size adjusting member 230 can adjust the longitudinal length of the outer portion 221 that supports the absorbent pad or the diaper, thereby eliminating slack in the crotch portion of the outer portion 221.

[0155] Furthermore, even in the rompers 200 (FIG. 14) having the supporter parts 222, the size adjustment members 230 may be provided on the non-skin side of the outer parts 221. By exposing the size adjustment members 230, it becomes easier to adjust the size using the size adjustment members 230 even after the rompers have been worn.

[0156] The size adjustment member 230 of the third embodiment can have the same features (configuration, arrangement, length, etc.) as the size adjustment member 10 of the first embodiment, but a detailed description of the common features will be omitted. For example, the detachable portion 232 may be located closer to the abdomen than the fixed portion 231, and the detachable portion 232 may be provided with a hook material, or the size adjustment member 230 may be stretchable in the longitudinal direction. Furthermore, the size adjustment member 230 may straddle the longitudinal center CL of the region RLh that longitudinally overlaps with the leg openings, or may be provided in the center of the width of the lower main body portion 220. Furthermore, the size adjustment member 10 of the modified example of the first embodiment ( FIGS. 9A to 9C ) can also be used in the romper 200. Furthermore, although not shown, the snap buttons 50 (other size adjustment members) of the first embodiment may be provided on the supporter portion 222 or the outer portion 221.

[0157] Furthermore, while the example illustrated here is of a one-piece garment in which both the upper main body portion 210 and the lower main body portion 220 are expandable in the front-to-back direction, this is not limiting. For example, the widthwise central portion of the upper main body portion may be detachably separated, allowing the upper main body portion to expand in the left-to-right direction. It is also preferable that at least one of the upper main body portion 210 and the lower main body portion 220 be expandable in the front-to-back direction or the left-to-right direction, thereby improving ease of wearing the one-piece garment. For example, only one widthwise side portion of the lower main body portion may be expandable in the front-to-back direction, or both widthwise side portions of the lower main body portion may be inseparably connected.

[0158] The above-described embodiments are intended to facilitate understanding of the present invention and are not intended to limit the present invention. The present invention may be modified or improved without departing from the spirit thereof, and it goes without saying that the present invention includes equivalents thereof.

[0159] REFERENCE SIGNS LIST 1 (Tape-type) cloth diaper cover, 2 Main body member, 3 Fastening portion, 4 Flap portion, 10 Size adjustment member, 11 Fixed portion, 12 Detachable portion, 21 Abdominal stretchable portion, 30 Leg stretchable portion, 41 Dorsal stretchable portion, 50 Snap button (other size adjustment member), 51 Male button, 52 Female button, 60 Low-stretch portion, 70 (Pants-type) cloth diaper cover, 71 Main body member, 100 Pants-type diaper cover (cloth diaper cover), 113 Engagement portion, 114 Engagement portion, 110 Outer portion (main body member), 120 Supporter portion (main body member), 130 Size adjustment member, 131 Fixed portion, 132 Detachable portion, 200 Rompers (one-piece top and bottom garment), 201-203 Engagement portion, 205 Rompers (top and bottom integrated garment), 210 Upper body portion, 220 Lower body portion, 221 Outer portion (main body member), 222 Supporter portion (main body member), 230 Size adjustment member, 231 Fixing portion, 232 Detachable portion,

Claims

1. A cloth diaper cover to be used in conjunction with an absorbent pad or diaper, which, in an unfolded and stretched state, has a longitudinal direction, a width direction, and a thickness direction that are perpendicular to one another, and which comprises a main body member and a size adjustment member for adjusting the longitudinal length of the main body member, wherein the size adjustment member has a fixed part that is fixed to the main body member and a detachable part that is detachable from the main body member, and wherein, when the cloth diaper cover is divided into four equal parts in the longitudinal direction, the two central regions are defined as the crotch part, and the entire fixed part is located in the crotch part.

2. A cloth diaper cover according to claim 1, wherein the fixed part is fixed to the non-skin side of the main body member, and the detachable part is detachable from the non-skin side of the main body member.

3. A cloth diaper cover as claimed in claim 1 or 2, characterized in that, in the unfolded and stretched state, the size adjustment member is arranged across the centre of the cloth diaper cover in the longitudinal direction.

4. A cloth diaper cover as claimed in claim 1 or 2, characterized in that in the unfolded and extended state, the detachable part is located on the ventral side in the longitudinal direction relative to the fixed part.

5. A cloth diaper cover according to claim 1 or 2, characterized in that the size adjustment member is provided at the center of the width of the cloth diaper cover.

6. A cloth diaper cover as claimed in claim 1 or 2, characterized in that a hook material is provided on one of the main body member and the detachable part, and the other of the main body member and the detachable part can be fastened to the hook material.

7. The cloth diaper cover according to claim 6, wherein the hook member is provided at the attachment / detachment portion.

8. A cloth diaper cover as claimed in claim 1 or 2, characterized in that, in the unfolded and stretched state, the maximum longitudinal length of the size adjustment member is 13% or more of the longitudinal length of the cloth diaper cover at the centre of the width direction.

9. A cloth diaper cover as claimed in claim 1 or 2, characterized in that, in the unfolded and stretched state, the maximum longitudinal length of the size adjustment member is less than 25% of the longitudinal length of the cloth diaper cover at the centre in the width direction.

10. A cloth diaper cover as claimed in claim 1 or 2, characterized in that it has a pair of other size adjustment members for adjusting the longitudinal length of the main body member, and the pair of other size adjustment members are provided on both sides of the cloth diaper cover in the width direction.

11. A cloth diaper cover as claimed in claim 10, characterized in that, in the unfolded and stretched state, the other size adjustment member is provided on the abdominal side of the longitudinal center of the cloth diaper cover.

12. A cloth diaper cover as described in claim 10, characterized in that, in the unfolded and extended state, the detachable part is located on one side of the fixed part in the longitudinal direction, and the other size adjustment member is located on the one side of the fixed part in the longitudinal direction.

13. A cloth diaper cover as claimed in claim 10, wherein the other size adjustment members are snap buttons, the snap buttons have male and female buttons, and in an unfolded and stretched state, when the region from the center of the male button to the center of the female button in the longitudinal direction is defined as a first region, and the region in which the fixing part is located in the longitudinal direction is defined as a second region, the average value of the curvature of the widthwise side edges of the cloth diaper cover in the first region is smaller than the average value of the curvature of the widthwise side edges of the cloth diaper cover in the second region.

14. A cloth diaper cover as claimed in claim 1 or 2, characterized in that the size adjustment member is stretchable in the longitudinal direction, and when the length of the size adjustment member in its natural state in the longitudinal direction is 100%, the force required to stretch the size adjustment member 120% in the longitudinal direction is 1 N / 25 mm or less.

15. A cloth diaper cover as claimed in claim 1 or 2, wherein the size adjustment member is stretchable in the longitudinal direction, and when the longitudinal length of the size adjustment member in its natural state is 100%, the force required to stretch the size adjustment member by 120% in the longitudinal direction is smaller than the engaging force between the main body member and the detachable part.

16. The cloth diaper cover according to claim 1 or 2, wherein the air permeability in the thickness direction in the crotch area is 10 m / s. ３ / m ２ / min or more, 100m ３ / m ２ / minute or less.

17. A cloth diaper cover according to claim 1 or 2, characterized in that it does not have a waterproof layer.

18. A cloth diaper cover as claimed in claim 1 or 2, characterized in that a pair of fastening portions are provided at both ends in the width direction of at least one of the back side portion and the ventral side portion in the longitudinal direction.

19. A one-piece garment for use in conjunction with an absorbent pad or diaper, comprising an upper main body portion worn on the upper body and a lower main body portion worn on the lower body, wherein the lower main body portion, when unfolded and stretched, has a longitudinal direction, a width direction, and a thickness direction that are perpendicular to one another, and comprises a main body member and a size adjustment member for adjusting the longitudinal length of the main body member, wherein the size adjustment member has a fixed part fixed to the main body member and a detachable part detachable from the main body member, and wherein when the area of ​​the main body member that overlaps with the leg openings in the longitudinal direction is divided into four equal parts in the longitudinal direction, the two central areas are defined as the crotch area, and the fixed part is entirely located in the crotch area.

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