JP2017018444A - Disposable underwear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disposable underwear which has a short rise, which does not compress the vicinity of a navel of a wearer, which can be stabilized at a wearing position.SOLUTION: A disposable underwear 1 comprises: a belly side member 2 and a back side member 3 which are jointed each other at both joint parts 5a, 5b along both end parts in a girth direction; a crotch member 4 which is stretched to both center parts 2c, 3c of the belly side member 2 and the back side member 3 and is jointed; a waist opening part 6 which is formed by being surrounded by both upper end edges 7, 8 of the belly side member 2 and the back side member 3; and left and right leg opening parts 9a, 9b formed by being surrounded by the belly side member 2, the back side member 3 and the crotch member 4. The disposable underwear is formed to become wider from the waist opening part 6 to the left and right leg opening parts 9a, 9b, and the center part 7a of the upper end edge 7 of the belly side member 2 is lowered relative to the upper end edge 8 of the back side member 3.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a disposable underwear such as a pants-type disposable diaper or a pad holder.

  Conventionally known disposable underwear such as pants-type disposable diapers and pad holders have a long crotch and a waist opening with an elastic member that expands and contracts around the waist when worn by a normal wearer. It is located almost horizontally around the person's navel. For example, in Patent Document 1, when a disposable diaper worn by a person sitting on the floor is viewed from the side, the waist opening is positioned substantially horizontally around the wearer's navel. Diapers are shown.

Japanese Patent No. 3916878

  However, disposable diapers that have a waist opening positioned almost horizontally around the wearer's navel when worn will support the wearing position by tightening the waist opening around the navel without a skeleton. When taking a forward bending posture, the diaper is greatly deformed, and the wearing position tends to shift. When taking such a posture, the diaper may press the wearer's abdomen and cause discomfort. In addition, such disposable diapers have a long rise and are easy to protrude from the pants and skirt. A disposable diaper made of a non-woven fabric is inferior in flexibility and hygroscopicity as compared to cloth underwear, and therefore, when the area covering the wearer is large, the wearing feeling is not good. Such diapers are particularly unsuitable for relatively active adults.

  In order to solve the above problems, an object of the present invention is to provide a disposable diaper that has a short crotch, does not press around the wearer's navel, and has a stable wearing position.

  In order to solve the above-mentioned problem, the disposable underwear of the present invention includes a ventral member and a dorsal member that are joined to each other at both joints along both ends in the waistline direction, and the ventral member and the dorsal member. A crotch member that is bridged and joined to both center portions, a waist opening that is surrounded by both upper edges of the ventral member and the dorsal member, the ventral member, and the dorsal member; Left and right leg openings formed by being surrounded by the crotch member, and extending from the waist opening to the lower left and right leg openings, and a central portion of the upper edge of the ventral member Is lower than the upper edge of the back member.

  The disposable underwear according to one aspect of the present invention includes a waistline elastic member extending in the waistline direction of the abdominal member and the backside member, and a waistline direction from a lower portion of each joint portion of the belly member. And a first elastic member extending upward to the upper edge side.

  The disposable underwear according to another aspect of the present invention is such that the waistline elastic member extending in the waistline direction of the ventral member has higher tension than the waistline elastic member extending in the waistline direction of the back side member. Have.

  In the disposable underwear of still another aspect of the present invention, the non-elastic region for eliminating the tension of the elastic member in the region is formed in a tapered shape having a vertex on the upper edge side in the center of the waist side direction of the ventral member. Is done.

  According to still another aspect of the present invention, the disposable undergarment has a non-elastic region in which the tension of the elastic member in the region disappears is formed in a tapered shape having a vertex on the upper end edge side in the center of the waist side direction of the back side member. Is done.

  In the disposable underwear of still another aspect of the present invention, the crotch member includes at least one pair of ventral connection elastic members, and the ventral end portion of the portion to be joined to the crotch member of the ventral connection member includes: The crotch member overlaps with the region to be joined to the abdomen member, and the back end portion of the abdomen connection member joined to the crotch member overlaps the back member of the crotch member. And does not overlap the area to be joined.

  In the disposable underwear according to still another aspect of the present invention, the lower end edge of the ventral member is a pair of both end lines substantially parallel to the waistline direction and a pair of ascending toward the upper end edge from the both end lines toward the central portion. An inclined line and a center line connecting the both end lines, and a lower end edge of the back member is an end line that is substantially parallel to a waistline direction, and an upper end edge that extends from the both end lines toward the center portion. A pair of inclined lines descending to the opposite side and a central line connecting the both end lines are included.

  The disposable underwear of still another aspect of the present invention is such that the lower end edge of the ventral member is abutted with the lower end edge of the dorsal member in a state where the ventral member and the dorsal member are separated and extended. Match.

  Further details, features and advantages of the present invention will become apparent from the following description of preferred exemplary embodiments described with reference to the drawings.

It is a front view of the disposable underwear of one embodiment of the present invention. It is a rear view of this disposable underwear. It is a figure which shows the cutting planned line for forming the abdominal side member and back side member of this disposable underwear, the elastic member of an expansion | extension state, and an inelastic area | region. It is an expanded view in the state where the elastic member of this disposable underwear was extended. It is a front view in the state where the elastic member of the crotch member of this disposable underwear was extended. FIG. 6 is a schematic cross-sectional view taken along line VI-VI of the crotch member in FIG. 5. It is a front view which shows the state with which this disposable underwear was worn. It is a rear view which shows the state with which this disposable underwear was worn. It is a left view which shows the state with which this disposable underwear was worn. It is an expanded view in the state where the elastic member of the disposable underwear of other embodiments was extended. It is an expanded view in the state where the elastic member of the disposable underwear of other embodiments was extended. It is an expanded view in the state where the elastic member of the disposable underwear of other embodiments was extended.

One exemplary embodiment of the invention is described below.
FIG. 1 is a front view of a pants-type disposable diaper 1 which is a disposable underwear according to this embodiment, and FIG. 2 is a rear view thereof. FIG. 3 is a diagram illustrating a cut line for forming the abdominal member 2 and the dorsal member 3 of the disposable diaper 1, an elastic member in an expanded state, and an inelastic region. FIG. 4 is a development view in a state where each elastic member of the disposable diaper 1 is extended. FIG. 5 is a front view of the disposable diaper 1 with the elastic member of the crotch member 4 extended. FIG. 6 is a schematic cross-sectional view taken along line VI-VI of the crotch member 4 of FIG.
As shown in FIG.1 and FIG.2, the disposable diaper 1 of this embodiment is the abdominal member 2 located in a wearer's abdominal side at the time of wear, the back | dorsal member 3 located in a back | dorsal side, and each of these center A crotch member 4 that is stretched over and joined to the portions 2c and 3c. The ventral member 2 and the dorsal member 3 are both joined portions 5a formed along both end portions 2a, 2b in the waist direction of the belly member 2 and both ends 3a, 3b in the waist direction of the dorsal member 3. 5b are joined together. Positioning joints K1 and K2 are formed below and around the joints 5a and 5b. The waist opening 6 is formed so as to be surrounded by the upper end edge 7 of the ventral member 2 and the upper end edge 8 of the dorsal member 3. The left and right leg openings 9 a and 9 b are formed by being surrounded by the lower end edge 10 of the ventral member 2, the lower end edge 11 of the back member 3, and the left or right edge 4 a or 4 b of the crotch member 4.

  As shown in FIGS. 1 and 2, a waist elastic member 12 extends in the waist direction on the abdominal member 2 and the back member 3. In the left and right leg openings 9a, 9b of the ventral member 2, a first leg elastic member 13 as a first elastic member extends. The elastic members 14 around the second leg extend in the left and right leg openings 9 a and 9 b of the back member 3. The non-elastic regions P1, P2, and P3 are regions in which the tensions of the elastic members 12, 13, and 14 extending in the respective regions are eliminated. Around the waist opening 6 of the abdominal member 2 and the back member 3 and the periphery thereof, waist gathers 15 and 15 are formed. Under the waist gathers 15 and 15 of the abdominal member 2 and the back member 3, waist circumference gathers 16 and 16 are formed. Leg gathers 17 and 17 are formed in the left and right leg openings 9a and 9b of the ventral member 2. Leg gathers 18 and 18 are formed in the left and right leg openings 9a and 9b of the back side member 3, respectively. Crotch gathers 19 and 19 are formed in regions where the left and right leg openings 9a and 9b of the crotch member 4 and the crotch elastic members 25 (that is, 25a, 25b, and 25c) around the crotch member 4 extend.

  As shown in FIG. 3, the abdominal member 2 and the dorsal member 3 of the disposable diaper 1 are composed of an inner sheet 101 located on the wearer side when worn and an outer sheet 102 located on the opposite side of the wearer. The laminated body including the structure bonded together with the waist elastic member 12, the first leg elastic member 13 and the second leg elastic member 14 appropriately disposed in an extended state between the two is attached to the cutting line C. It is formed by cutting along. The lower end edge 10 of the ventral member 2 and the lower end edge 11 of the dorsal member 3 are formed by cutting along a common cutting line C, and match when they are abutted in an extended state.

  The material of the inner sheet 101 and the outer sheet 102 of the disposable diaper 1 is a non-woven fabric made of chemical fibers such as polyethylene, polypropylene, polyester, nylon, rayon, natural fibers such as cotton, cellulose, or combinations thereof. The material is not limited to a nonwoven fabric, but may be a resin film, a tissue, an elastic material, or a laminate thereof, or a sheet formed by appropriately connecting them.

  As shown in FIG. 4, the ventral member 2 in the extended state has a rectangular shape in which a portion excluding both ends of one long side is recessed in a substantially trapezoidal shape. Both end portions 2a and 2b and the upper end edge 7 of the ventral member 2 in the waist circumference direction are linear. The lower end edge 10 of the ventral member 2 includes a pair of both end lines 10a and 10a, a pair of inclined lines 10b and 10b, and a center line 10c. The both end lines 10a and 10a are substantially parallel to the waist direction of the abdominal member 2, and extend from both end portions 2a and 2b to positions slightly beyond the joint portions 5a and 5b. The inclined lines 10b and 10b extend from the both end lines 10a and 10a to the left and right boundaries of the central portion 2c, which is a region overlapping the crotch member 4 of the abdominal member 2, and gradually rise toward the upper edge 7 side. The center line 10c is substantially parallel to the trunk circumference direction, and connects the two inclined lines 10b and 10b.

  As shown in FIG. 4, the extended dorsal member 3 has a rectangular shape in which a portion excluding both ends of one long side protrudes in a substantially trapezoidal shape to the outside. Both end portions 3a, 3b and upper end edge 8 of the back side member 3 in the waist circumference direction are linear. The lower end edge 11 of the back member 3 includes a pair of both end lines 11a and 11a, a pair of inclined lines 11b and 11b, and a center line 11c. Both end lines 11a and 11a are substantially parallel to the trunk direction of the back member 3 and extend from both end portions 3a and 3b to positions slightly beyond the joint portions 5a and 5b. The inclined lines 11b and 11b gradually descend from the both end lines 11a and 11a to the opposite side of the upper edge 8 from the left and right boundaries of the central portion 3c, which is an area overlapping the crotch member 4 of the back member 3 (in FIG. 4). Extends). The center line 11c is substantially parallel to the circumference direction of the trunk, and connects the two inclined lines 11b and 11b.

  As shown in FIG. 4, the length of the abdominal member 2 in the circumferential direction or the horizontal direction, that is, the length of the straight upper edge 7 of the abdominal member 2 is the circumferential direction or the lateral direction of the back side member 3. Is substantially equal to the length of the straight upper edge 8 of the back member 3. Further, the crotch of the abdominal member 2, that is, the distance from the upper end edge 7 to the lower end edge 10 of the abdominal member 2 is the longest in the vicinity of both joint portions 5 a and 5 b, and near the left and right boundaries of the central portion 2 c overlapping the crotch member 4. Is the shortest. The crotch of the dorsal member 3, that is, the distance from the upper end edge 8 to the lower end edge 11 of the dorsal member 3 is the shortest in the vicinity of both joints 5 a and 5 b and the longest in the vicinity of the left and right boundaries of the central part 3 c overlapping the crotch member 4. It becomes. The both ends 2a and 2b of the abdominal member 2, the both ends 3a and 3b of the back member 3, and the joints 5a and 5b of both members are substantially equal. The difference between the rise at the joints 5a and 5b of the ventral member 2 and the rise at the left and right boundaries of the central portion 2c of the ventral member 2, and the rise and dorsal side at the left and right boundaries of the central portion 3c of the dorsal member 3 In the adult disposable disposable diaper, the difference from the rise at the joints 5a and 5b of the member 3 is 3 to 12 cm, and more desirably 5 to 9 cm.

  As shown in FIG. 4, the crotch member 4 is joined to the inner surface sheets 101, 101 of the central portions 2 c, 3 c of the abdominal member 2 and the back member 3. The crotch member 4 is folded in half so that the inner sheet 101 is inside the disposable diaper 1, and both end portions 2 a and 2 b of the abdominal member 2 are overlapped with both end portions 3 a and 3 b of the back member 3. Joined portions 5a and 5b are formed along the overlapped end portions 2a and 3a and 2b and 3b. The joint portions 5a and 5b can be formed by various sealing methods such as adhesion using an adhesive, heat sealing, and ultrasonic sealing. The joint portions 5a and 5b are formed in regions between the upper end edges 7 and 8 of the abdominal side member 2 and the back side member 3 and parallel both end lines 10a, 10b, 11a and 11b of the lower end edge. Therefore, the joining portions 5a and 5b can be formed along the entire vertical length of both end portions 2a, 2b, 3a and 3b and with a sufficient width. The joint portions 5a and 5b are formed intermittently over the entire vertical length of both end portions 2a, 2b, 3a and 3b. In addition, the junction parts 5a and 5b are not restricted to this, You may form continuously over the whole up-and-down length of both ends 2a, 2b, 3a, and 3b.

  As shown in FIG. 4, the lower part of the joint parts 5a and 5b formed along the two ends 2a, 3a and 2b and 3b in the circumference direction of the ventral member 2 and the back member 3 and the periphery thereof are joined. Positioning joints K1, K2 formed so as to overlap a part of the portions 5a, 5b are formed. The positioning joint K1 is not in contact with the ends 2a and 3a, and the positioning joint K2 is not in contact with the ends 2b and 3b. However, the present invention is not limited to this, and the positioning joint may be in contact with each of the end portions. Further, the positioning joint may be formed as a part of the joints 5a and 5b without overlapping the joints 5a and 5b. Further, the positioning joints may be formed around the joints 5a and 5b without overlapping the joints 5a and 5b.

  As shown in FIGS. 3 and 4, the waist elastic member 12, the first leg elastic member 13 as the first elastic member, and the second leg elastic member 14 are all in a group of a plurality of thread-like elastic members. It is a member. Each thread-like elastic member is arranged and bonded as appropriate on the inner sheet 101 or the outer sheet 102 constituting the abdominal member 2 and the dorsal member 3 in a stretched state. Both sheets 101 and 102 are bonded together with each elastic member interposed therebetween.

  As shown in FIGS. 3 and 4, the waistline elastic member 12 includes waistline elastic members 12a, 12b, 12c, 12d, 12e, and 12f. The waistline elastic members 12 a, 12 b, and 12 c are arranged in a state of being stretched in the waistline direction of the ventral member 2. The waistline elastic member 12 a is disposed in the waist opening 6 along the upper end edge 7 of the abdominal member 2 and a region around it. The waistline elastic member 12b is disposed in a region below the waistline elastic member 12a and above the center line 10c of the ventral member 2. The waist elastic member 12c is disposed in a region below the waist elastic member 12b and above both ends of the first leg elastic member 13. As shown in FIG. 3, the waistline elastic member 12 c crosses the cut line C. Therefore, a part of the waistline elastic member 12 c extends around the center line 11 c of the back member 3.

  As shown in FIGS. 3 and 4, the waistline elastic members 12 d, 12 e, and 12 f are arranged in a state of being stretched in the waistline direction of the back side member 3. The waist elastic member 12d is disposed in the waist opening 6 along the upper end edge 8 of the back member 3 and a region around it. The waistline elastic member 12e is disposed below the waistline elastic member 12d, that is, in a region on the lower end edge 11 side. The waistline elastic member 12f is disposed below the waistline elastic member 12e, that is, on the lower end edge 11 side and above the second leg periphery elastic member 14, that is, on the upper end edge 8 side. The vertical length of the region where the waist elastic members 12d, 12e, and 12f of the back side member 3 are arranged, that is, the length in the direction perpendicular to the waist circumference direction, respectively, is the waist elastic member 12a, It is substantially equal to the vertical length of the region where 12b and 12c are arranged.

  Among the waist elastic members 12a, 12b, and 12c of the abdominal member 2, the arrangement intervals of the thread-like elastic members of the constituent elements are the narrowest in the waist elastic member 12a and the second in the waist elastic member 12b. It is narrow and the waist elastic member 12c is the widest. The arrangement intervals of the waist elastic members 12d, 12e, and 12f of the back side member 3 are substantially equal to the arrangement intervals of the waist elastic members 12a, 12b, and 12c of the abdominal member 2, respectively. In the present embodiment, the arrangement intervals of the thread-like elastic members, which are constituent elements of the waistline elastic member 12a, are substantially equal. The same applies to the other waistline elastic members 12b to 12f. The arrangement | positioning space | interval of the waist elastic member 12 is not restricted above, In consideration of the shape of each part of a wearer's body, it can adjust suitably in order to aim at improvement of fit property or an external appearance property.

  In the present embodiment, the waist elastic members 12a to 12c, the first leg elastic member 13 and the second leg elastic member 14 of the ventral member 2 have the same tension and stretch ratio per unit length. On the other hand, the waist elastic members 12d to 12f of the back member 3 have a lower draw ratio than the waist elastic members 12a to 12c of the abdominal member 2. That is, the waist elastic member 12 of the abdominal member 2 has a higher tension than the waist elastic member 12 of the back member 3. The ventral member 2 and the dorsal member 3 have substantially the same length in the waist circumference direction. As shown in FIG. 1, the abdominal member 2 contracts in the waist direction more than the back member 3, and the joint portions 5 a and 5 b appear on the side of the abdominal member 2 of the disposable diaper 1, that is, the front side.

  As a modification of the present embodiment, the tension of the waist elastic member 12 of the ventral member 2 may be increased in the order of 12a, 12b, and 12c. Further, the tension of the waist elastic member 12 of the back member 3 may be increased in the order of 12d, 12e, and 12f. In this way, the tension of the waist elastic member 12 of the abdominal member 2 and the back member 3 decreases from region to region or stepwise from the waist opening 6 toward the lower leg openings 9a, 9b. You may do it. The disposable diaper 1 deformed in this manner is adjusted in more detail so that the waist opening 6 contracts and expands from the waist opening 6 toward the lower leg openings 9a, 9b, to the wearer. The fitting property can be improved. Note that the tension of the waistline elastic member 12 may gradually decrease from the waist opening 2 toward the lower leg openings 9a and 9b not for each region but for each elastic member. In order to make the tension of the elastic member different, the stretching ratio of the elastic member may be different, or elastic members having different elastic moduli may be used.

  As shown in FIGS. 3 and 4, the first leg elastic member 13, which is the first elastic member, does not extend along the lower edge 10 that forms the left and right leg openings 9 a and 9 b of the ventral member 2. Rather, it extends upward from the lower part of the joints 5a, 5b of the abdominal member 2 to the center in the waist circumference direction toward the upper edge 7. The first leg elastic member 13 extends substantially linearly from the lower part of each joint 5a, 5b in a direction toward the center near the lower end of the waist elastic member 12a. The region where the elastic member 13 around the first leg extends and the region overlapping the crotch member 4 of the abdominal member 2 and the region of the leg openings 9a, 9b around it have good fit to the wearer. The central portion of the first leg-hole elastic member 13 has a gentle curved shape. The tension of the first leg elastic member 13 is such that the first leg elastic member 13 extends linearly from the lower part of the left joint part 5a to the lower part of the right joint part 5b. The force which pulls down the center part 7a of this is produced. Thereby, the disposable underwear 1 is such that the central portion 7 a of the upper end edge 7 of the abdominal member 2 is lower than the upper end edge 8 of the dorsal member 3. In addition, although each thread-like elastic member which comprises the 1st leg periphery elastic member 13 is parallel and the arrangement space | interval is substantially equal, it is not restricted to this, It is not necessary to be parallel and the arrangement space | interval is not equal. Also good.

  As shown in FIGS. 3 and 4, the second leg-hole elastic member 14 extends downward from the lower part of the joints 5 a, 5 of the back side member 3 to the center line 11 c to the opposite side to the upper edge 8. ing. The second leg-hole elastic member 14 extends substantially linearly from the lower part of each joint 5a, 5b to the left and right ends of the center line 11c. The region where the elastic member 14 around the second leg of the back member 3 extends has good fit to the wearer. The second leg elastic member 14 intersects with the waist elastic member 12c in the central portion 3c overlapping the crotch member 4 of the back side member 3 and its left and right peripheral regions. As shown in FIG. 3, the second leg-hole elastic member 14 crosses the cut line C. Therefore, a part of the elastic member 14 around the second leg extends in the region of the central portion 2 c of the ventral member 2. The thread-like elastic members constituting the second leg-around elastic member 14 are parallel and have substantially the same arrangement interval. However, the arrangement is not limited to this, and the arrangement intervals are not equal. Also good.

  Each thread-like elastic member constituting the waist elastic member 12, the first leg elastic member 13, and the second leg elastic member 14 is made of a stretchable material such as natural rubber, polyurethane resin, stretchable hot melt or the like. It is formed. The elastic members 12, 13, and 14 are not limited to thread-like elastic members, but may be band-like or sheet-like elastic members. Moreover, you may form the abdominal side member 2 or the back side member 3 whole with raw materials, such as an elastic sheet. When a sheet-like elastic member is used, or when the abdominal member 2 or the entire dorsal member 3 is formed of an elastic sheet, the tension acts in the extending direction of the elastic members 12, 13, and 14. It is necessary to do so.

  3 and 4, inelastic regions P1, P2, and P3 are regions in which the tension of the elastic member in the region is lost. As processing for eliminating the tension of the elastic member, for example, cutting of the elastic member with a large number of convex portions or cutter blades, heat sealing, or the like may be selected as appropriate.

As shown in FIGS. 3 and 4, the non-elastic region P <b> 1 is formed in a triangular shape having a vertex on the upper edge 7 side at the center of the waist side direction of the ventral member 2. The apex of the triangle of the non-elastic region P1 is located on the center line in the waist direction of the ventral member 2 and near the upper end of the region where the waist elastic member 12b is disposed. The base of the triangle of the inelastic region P <b> 1 is located on the center line 10 c of the lower end edge 10. By forming the inelastic region P1, the waistline elastic member 12b is divided at the center, and the closer to the lower edge 10, the longer the portion where the tension disappears.
The shape of the non-elastic region P1 is not limited to a triangular shape, and may be a tapered shape having a vertex on the upper end edge 7 side of the ventral member 2, and may be a parabolic shape, an arc shape, or the like, for example.

As shown in FIGS. 3 and 4, the waist elastic member 12 a of the abdominal member 2 has the longest portion having tension because no inelastic region is formed. The waist elastic member 12b is divided into left and right by the non-elastic region P1, and becomes shorter as the portion having tension is closer to the lower edge 10. The waistline elastic member 12c is divided into left and right by the lower end edge 10, and the portion having tension is shorter than the waistline elastic member 12b and further toward the lower side.
Thus, by forming the non-elastic region P1, the ventral member 2 has the length of the portion having the tension of the waistline elastic member 12 from the waist opening 6 toward the lower leg openings 9a and 9b. Becomes shorter. Therefore, as shown in FIG. 1, the abdominal member 2 has a shape in which the waist opening 6 contracts and gradually widens from the waist opening 6 toward the lower leg openings 9 a and 9 b. The disposable diaper 1 has good fit to a wearer who normally has a body shape that becomes wider from the waist to the base of both legs.

  As shown in FIGS. 1, 3 and 4, the inelastic region P <b> 1 forms a portion where the tension disappears in a triangular shape at the center of the first leg elastic member 13, and the portion having the tension is formed at the center. It is divided. However, there is no inelastic region in the substantially linear portion extending upward from the lower part to the center of the left and right joints 5a and 5b toward the upper edge 7. The portion of the first leg elastic member 13 having the tension divided to the left and right is a tension in a direction in which the portion of the right joint 5b rises substantially linearly from the lower part to the center of the left joint 5a toward the upper edge 7. By pulling with tension in a direction that rises substantially linearly toward the upper edge 7 from the lower part to the center, a force for lowering the central part of the ventral member 2 is generated. Thereby, as shown in FIG. 1, as for the disposable diaper 1, the upper end edge 7 of the abdominal side member 2 is falling rather than the upper end edge 8 of the back side member 3 by making the center part 7a into the lowest position.

  As shown in FIGS. 2 to 4, the non-elastic region P <b> 2 is formed in a substantially rectangular shape having one long side on the central line 11 c of the central portion 3 c of the back member 3. The left-right width of the inelastic region P2 is the same as the width of the base of the triangle of the inelastic region P1. By forming the non-elastic region P2, the tension of the central portion of the waistline elastic member 12c and the part of the second leg periphery elastic member 14 is lost.

  As shown in FIGS. 2 to 4, the non-elastic region P <b> 3 has a substantially triangular shape with the top edge 8 as a vertex at the center of the back side member 3 in the waist circumference direction, and a substantially rectangular shape having the same width as the base of the triangle. Are formed into a home base shape. The apex of the triangular portion of the non-elastic region P3 is located on the center line in the waist circumference direction of the back side member 3 and in the upper part in the region where the waist circumference elastic member 12e is disposed. The base of the triangular portion of the inelastic region P3 is located between the waistline elastic member 12e and the waistline elastic member 12f. The bottom of the rectangular portion of the inelastic region P3 on the lower end edge 11c side is located closer to the lower end edge 11 than the waistline elastic member 12f. The left and right width of the inelastic region P3 is larger than the left and right widths of the inelastic regions P1 and P2. By forming the non-elastic region P3, the waistline elastic member 12e is divided at the center, and the closer to the lower edge 11, the longer the portion where the tension disappears. The waist elastic member 12f has a portion where the tension is lost spread at the center. The shape of the inelastic region P3 is not limited to the home base shape, and may be a tapered shape having a vertex on the upper edge 8 side of the back side member 3.

  As shown in FIGS. 3 and 4, the waist elastic member 12 d of the back member 3 has the longest portion having tension because no inelastic region is formed. The waistline elastic member 12e is divided into left and right by the non-elastic region P3, and becomes shorter as the portion having tension is closer to the lower end edge 11. The waist elastic member 12f is divided into left and right by the non-elastic region P3, and the length of the portion having the tension is the same as the length of the portion having the tension closest to the lower end edge 11 of the waist elastic member 12e. is there. In this way, by forming the non-elastic region P3, the back side member 3 has a length of a portion having tension of the waistline elastic member 12 from the waist opening 6 toward the lower leg openings 9a and 9b. Becomes shorter. Therefore, as shown in FIG. 2, the back side member 3 has a shape in which the waist opening 6 contracts and gradually widens from the waist opening 6 toward the lower leg openings 9 a and 9 b. The disposable diaper 1 has good fit to a wearer who normally has a body shape that becomes wider from the waist to the base of both legs.

  As shown in FIG. 4, the inelastic regions P <b> 1, P <b> 2, and P <b> 3 are inside the absorbent body 20 that is disposed on the crotch member 4 when the crotch member 4 is joined to the abdominal member 2 and the back member 3. It is formed in the position. By the inelastic regions P1, P2, and P3, the tension of the main portion of the elastic member included in the region where the absorber 20 is disposed is eliminated. This suppresses the absorber 20 from being deformed or contracted by the tension of the elastic member.

  As shown in FIG. 1 and FIG. 2, the waist gathers 15 and 15 are the waist opening 6 of the ventral member 2 and the back member 3 and the periphery thereof, and the waist elastic member 12 a or 12 d is disposed. Formed in the region. The waist gathers 15 and 15 appropriately attach the waist opening 6 of the disposable diaper 1 to the wearer to prevent the diaper 1 from sliding down and excrement from the waist opening 6.

  As shown in FIGS. 1 and 2, the waist circumference gathers 16, 16 are located around the waist circumference gathers 15, 15 of the ventral member 2 and the back side member 3, and the waist circumference elastic members 12 b and 12 c, or It is formed in a region where the waist elastic members 12e and 12f are disposed. The waistline gathers 16, 16 allow the abdominal member 2 and the back member 3 of the disposable diaper 1 to be in close contact with the wearer, and the crotch member 4 and the absorbent body 20 are deformed by the non-elastic regions P1, P2, and P3. While being suppressed, it improves the fit of diapers and prevents leakage of excreta.

  As shown in FIG. 1, the leg circumference gathers 17, 17 are formed in the left and right leg openings 9 a, 9 b of the ventral member 2 and the periphery thereof and in the region where the first leg circumference elastic member 13 is disposed. ing. As shown in FIGS. 1 and 2, the leg gathers 18 and 18 are the left and right leg openings 9a and 9b of the back side member 3 and the periphery thereof, and the region where the second leg elastic member 14 is disposed. Is formed. The leg gathers 17, 17 and 18, 18 allow the left and right leg openings 9 a, 9 b of the disposable diaper 1 to be in close contact with the wearer to prevent leakage of excrement etc. from the leg openings 9 a, 9 b.

  As shown in FIG. 4 to FIG. 6, the crotch member 4 includes a crotch sheet 4 that is a crotch member body, an absorbent body 20 in which an absorbent material 21 is wrapped with an upper layer tissue 22a and a lower layer tissue 22b, a top sheet 23, It includes a back sheet 24, a crotch elastic member 25 that is appropriately arranged in a state of being stretched on the crotch sheet 4, and a ventral joint part J <b> 1 and a back joint part J <b> 2.

  As shown in FIG. 4, the crotch sheet 4, which is the main body of the crotch member 4, is bridged between the central part 2 c of the abdominal member 2 and the central part 3 c of the dorsal member 3, and is placed on each inner sheet 101. Be joined. The crotch sheet 4 includes a ventral member 2 that includes a ventral joint portion J1 that is substantially the entire surface overlapping the ventral member 2 and a dorsal joint portion J2 that is approximately the entire surface overlapping the dorsal member 3. And it joins to the back side member 3 with an adhesive agent. The crotch sheet 4 is made of non-woven fabric, but is not limited to this, and the same material as the inner sheet 101 and the outer sheet 102 of the abdominal member 2 and the dorsal member 3 can be used.

  As shown in FIGS. 4 to 6, the crotch sheet 4 has a substantially rectangular shape in which the direction spanning the abdominal member 2 and the back member 3 is the longitudinal direction. The abdominal side edge 4c of the crotch sheet 4 is located between the waistline elastic member 12a and the waistline elastic member 12b of the abdominal side member 2. The back side edge 4d of the crotch seat 4 is located in the upper part in the region of the waist elastic member 12e of the back side member 3. Both end portions in the width direction of the crotch sheet 4 are folded back toward the absorbent body 20, and the folds form left and right side edges 4 a and 4 b of the crotch member 4. The end edges 4 e and 4 f of the folded piece of the crotch sheet 4 are positioned on the left and right outer edges of the maximum width portion of the absorbent body 20 disposed on the crotch sheet 4. However, the present invention is not limited thereto, and the end edges 4e and 4f of the folded piece of the crotch sheet 4 may be positioned on the inner edge of the absorbent body 20. The width of the crotch member 4, that is, the distance between the left and right side edges 4 a and 4 b is wider than the maximum width of the absorbent body 20. In addition, the shape of the crotch sheet | seat 4 is not restricted to substantially rectangular shape, The strip | belt shape whose abdominal side edge or back | dorsal side edge is a curve may be sufficient. The position and size at which the crotch member 4 is joined to the ventral member 2 or the back member 3 are not limited to those described above, and may be appropriately changed according to the size and shape of the diaper.

  As shown in FIGS. 4 to 6, the absorbent body 20 is disposed in the center of the crotch sheet 4. The length of the absorbent body 20 in the longitudinal direction is slightly shorter than the length of the crotch sheet 4 in the longitudinal direction. The length of the absorbent body 20 is preferably the length from the upper end of the wearer's buttocks to the upper end of the sacrum. The maximum width of the absorbent body 20 on the ventral side is preferably matched to the width of the wearer's buttocks. The maximum width on the back side of the absorbent body 20 is the same as the maximum width on the ventral side, but is not limited thereto, and may be larger than the maximum width on the ventral side. The absorber 20 is formed in an hourglass shape, and has a constricted portion 20b having a minimum width between the abdomen wide portion 20a having the maximum width and the back wide portion 20c. The absorbent body 20 is composed of a combination of absorbent paper, cotton-like pulp, a polymer absorbent, and the like, and quickly absorbs liquid materials such as urine and blood and holds them inside.

  As shown in FIG. 6, the absorbent body 20 has a lower layer tissue 22b, an absorbent material 21, and an upper layer tissue 22a laminated in order from the bottom, and a folded piece of the lower layer tissue 22b is laminated on the upper layer tissue 22a. Has a structured. The absorbent material 21 is formed by mixing pulverized pulp and a polymer absorbent material. The upper layer tissue 22 a is absorbent paper that covers the entire top surface of the absorbent material 21. The lower layer tissue 22 b is absorbent paper that covers the entire lower surface of the absorbent material 21.

  As shown in FIG. 6, the crotch member 4 has a crotch sheet 4, a back sheet 24, an absorbent body 20, and a top sheet 23 stacked in order from the bottom, and a folded piece of the crotch sheet 4 is placed on the top sheet 23. It has a stacked and bonded structure. The top sheet 23 is a sheet member that covers the entire top surface of the absorbent body 20, and is disposed on the inner side of the disposable diaper 1 on the side that touches the wearer's skin. The top sheet 23 is formed of a liquid permeable material such as a nonwoven fabric, and transmits urine, blood, etc. discharged into the diaper 1 and sends it to the absorber 20. The back sheet 24 is a sheet member that covers the entire lower surface of the absorbent body 20, and is fixed on the crotch sheet 4. The back sheet 24 is formed of, for example, a liquid-impermeable material such as a polyethylene film, and a liquid material that has permeated through the top sheet 23 and a liquid material that the absorber 20 has not absorbed can leak to the crotch sheet 4 and the outside. To prevent.

  As shown in FIGS. 4 to 6, the crotch elastic member 25 includes a crotch side edge elastic member 25a, an abdominal side connection elastic member 25b, and a crotch bottom elastic member 25c. All of the crotch elastic members 25 are arranged in a state of being stretched in the longitudinal direction of the crotch sheet 4. A portion indicated by a broken line of each crotch elastic member 25 is a portion where each crotch elastic member 25 in an expanded state is joined to the crotch sheet 4 with an adhesive or the like and has a tension. The crotch elastic member 25 has higher tension than the waist elastic member 12, the first leg elastic member 13, and the second leg elastic member 14. Of the crotch elastic member 25, the ventral connection elastic member 25b has the highest tension.

  As shown in FIGS. 4 to 6, the crotch side edge elastic member 25 a is joined between the crotch sheet 4 and the left and right folded pieces. The crotch side edge elastic members 25a are arranged one by one at the folds that are the left and right end portions 4a and 4b of the crotch member 4, and one by one closer to the center. The portions of the crotch side edge elastic member 25a having the tension are the abdominal side joint portion J1 that is overlapped and joined to the abdominal side member 2, and the back side joint portion J2 that is overlapped and joined to the back side member 3. There is a gap between them. In other words, the crotch side edge elastic member 25a is not connected to the abdominal side joint portion J1 and the abdominal side member 2, and is not connected to the back side joint portion J2 and the back side member 3. When the disposable diaper 1 is worn, the part having the tension of the crotch side edge elastic member 25a has the abdomen end located near the wearer's pubic bone, and the dorsal end is the wearer's pubic bone. It is preferably located near the sciatica.

As shown in FIGS. 4 to 6, the ventral connection elastic member 25 b is joined between the crotch sheet 4 and the back sheet 24 with an adhesive or the like. One ventral-side connecting elastic member 25b is disposed on the center side of the left and right crotch side edge elastic members 25a. The ventral connection elastic member 25 b extends in the longitudinal direction of the crotch member 4 along the left and right outer edges of the maximum width portion 20 a on the ventral side of the absorbent body 20. The abdomen end of the portion having the tension of the abdomen connection elastic member 25b is in a position overlapping the abdomen joint J1 of the crotch member 4. When the crotch member 4 is joined to the ventral member 2 at the ventral junction J1, the ventral connection elastic member 25b is connected to the ventral member 2. The end on the back side of the ventral connection elastic member 25 b does not overlap the back side joint J <b> 2 of the crotch member 4 and is not connected to the back side member 3. The back side end portion of the ventral side connection elastic member 25b is closer to the ventral side joint portion J1 than the back side end portion of the crotch side edge elastic member 25a. When the disposable diaper 1 is worn, the portion having the tension of the ventral connection elastic member 25b is such that the ventral end is located at the upper part of the wearer's buttocks and the dorsal end is the wearer's sciatic bone It is preferably located in the vicinity.
As shown in FIG. 1, the tension of the abdominal connection elastic member 25 b connected to the abdominal member 2 works in a direction transverse to the waist elastic member 12 and the first leg elastic member 13 of the abdominal member 2. Thus, since the abdominal member 2 is pulled toward the crotch member 4, the central portion 7a of the upper end edge 7 of the abdominal member 2 is pulled down.

  When the disposable diaper 1 is worn by the wearer, the pair of abdominal connection elastic members 25b, 25b of the crotch member 4 are connected to the abdomen member 2, and the abdomen member 2 and the crotch member 4 attract each other. High fit for the wearer. A pair of abdominal side connection elastic members 25b and 25b are located in both the outer edges of the maximum width part of the abdominal side of absorber 20, and are located in the both outsides of a wearer's buttocks. The left and right side portions of the crotch member 4 are joined together along the longitudinal direction of the crotch side edge elastic member 25a and the abdominal side connection elastic member 25b to form a gather. The left and right side portions where the gathers of the crotch member 4 are formed rise like the side walls due to the tension of the abdominal connection elastic member 25b connected to the abdominal member 2, and exhibit the function of a three-dimensional gather. Since the crotch side edge elastic member 25a is not connected to the abdominal member 2 or the back member 3, the width of the crotch member 4 can be expanded and contracted according to the body shape and movement of the wearer. In this way, the crotch member 4 has a three-dimensional shape that covers the side and bottom surfaces of the portion from the wearer's stomach side to the crotch, and has high fit. The crotch member 4 maintains a three-dimensional shape by the tension of the crotch side edge elastic member 25a and the abdominal side connection elastic member 25b, and can prevent leakage of excrement from the left and right side edges 4a and 4b of the crotch member 4.

  As shown in FIG. 4, the portion joined to the back side member 3 of the crotch member 4 has a width wider than the maximum width on the back side of the absorbent body 20. In addition, although the maximum width on the back side of the absorbent body 20 of the present embodiment is the same as the maximum width on the abdominal side, it is not limited thereto, and may be larger than the maximum width on the abdominal side. Since the crotch elastic member 25 is not connected to the back side member 3, even if the crotch elastic member 25 contracts due to the movement of the wearer, the portion of the crotch member 4 connected to the back side member 3 does not move. Thus, the disposable diaper 1 can be used to cover the wearer's buttocks with a wide width on the back side of the crotch member 4.

  As shown in FIGS. 4 to 6, the crotch bottom elastic member 25 c is joined between the crotch sheet 4 and the back sheet 24. The crotch bottom elastic members 25c are arranged one by one on the center side of the abdomen connection elastic members 25b and 25b. The portion having the tension of the crotch bottom elastic member 25 c is preferably arranged in accordance with the shape of the absorbent body disposed on the crotch member 4. When the absorbent body 20 has an hourglass shape, the crotch bottom elastic member 25c is formed on the left and right side edges of the constricted part 20b, which is the minimum width part of the absorbent body 20, and the outer edge of the maximum width part on the stomach side of the absorbent body 20. It arrange | positions so that it may not overlap with the absorber 20 in the clearance gap area between a certain abdominal side connection elastic member 25b. The crotch bottom elastic member 25c forms a gather in the gap area to prevent the bottom portion of the crotch member 4 from becoming duck and fit the wearer. Moreover, the shape of the bottom part of the crotch member 4 is stabilized. The crotch bottom elastic member 25c is not limited to one on each side, and a plurality of crotch bottom elastic members 25c may be formed. When the difference between the maximum width and the minimum width on the ventral side of the absorbent body 20 is small and the gap area is small, the crotch bottom elastic member 25c may be omitted.

In the present embodiment, the crotch side edge elastic member 25a has two left and right portions, the abdominal side connection elastic member 25b has one left and right, and the crotch bottom elastic member 25c has one left and one right, but this is not limitative. .
Like the waist elastic member 12, the first leg elastic member 13, and the second leg elastic member 14, the crotch elastic member 25 is a thread-like elastic material such as natural rubber, polyurethane resin, and elastic hot melt. Formed by material. Further, not only a thread-like elastic member but also a band-like or sheet-like elastic member can be used. Moreover, you may form the whole area | region where the crotch part gathers 19 are formed with raw materials, such as an elastic sheet. When a sheet-like elastic member is used, or when the entire area where the crotch part gather 19 is formed is formed of an elastic sheet, the tension acts in the direction in which each thread-like crotch elastic member 25 extends. It is necessary to do so.

  FIGS. 7, 8, and 9 are a front view, a rear view, and a left side view, respectively, showing a state in which the disposable diaper 1 of the present embodiment is worn. Dashed line AA is a horizontal line around the wearer's navel. Dashed line B is a line from the wearer's iliac crest to the superior anterior iliac spine. A broken line ZZ is a center line in the vertical direction of the wearer.

  As shown in FIGS. 1 and 7, the disposable diaper 1 according to this embodiment is configured so that the elastic member 13 around the first leg of the abdominal member 2 is on the upper edge 7 side from both joints 5a and 5b to the center in the waist circumference direction. It extends substantially linearly. The first leg elastic member 13 is longer than the waist elastic member 12. Although the first leg-hole elastic member 13 is divided at the center by the non-elastic region P1, the portions extending substantially linearly toward the upper edge 7 from the respective joint portions 5a and 5b to the center in the trunk-circumference direction are formed. By pulling each other, the central portion 7a of the upper end edge 7 of the ventral member 2 is pulled down. Further, the ventral connection elastic member 25 b of the crotch member 4 is connected to the ventral member 2 and pulls down the central portion 7 a of the upper end edge 7 of the ventral member 2. On the other hand, since the tension in the waist direction by the waist elastic member 12 is acting on the abdominal member 2, the central portion 7a of the upper end edge 7 of the abdominal member 2 is suppressed from falling. Further, the non-elastic region P1 shortens the length of the portion having the tension of the waistline elastic member 12 from the waist opening 6 toward the lower leg openings 9a and 9b, and the tension of the waistline elastic member 12 is reduced. Since it weakens, it helps that the center part 7a of the upper end edge 7 of the ventral member 2 is pulled down. Further, since the tension of the waist elastic member 12 of the abdominal member 2 is stronger than the tension of the waist elastic member 13 of the back member 3, the belly member 2 contracts in the waist direction more than the back member 3, The upper portions of the joint portions 5a and 5b along the both ends in the circumferential direction of the disposable diaper 1 are drawn toward the central side of the abdominal member 2, and the central portion 7a of the upper edge 7 of the abdominal member 2 is pulled down. To encourage. The upper end edge 7 of the ventral member 2 is lowered to such a position where the functions of the first leg elastic member 13, the ventral connection elastic member 25b, the waist elastic member 12, and the non-elastic region P1 are balanced, and such a position. It stabilizes at. Thereby, as shown in FIG.1 and FIG.7, as for the disposable diaper 1, the upper end edge 7 of the abdominal side member 2 is lower than the upper end edge 8 of the back side member 3 by making the center part 7a into the lowest part. In this embodiment, the upper end edge of the abdominal member 2 of the disposable diaper 1 using all of the first leg elastic member 13, the ventral connection elastic member 25b, the waist elastic member 12, and the non-elastic region P1. 7 has achieved that the central portion 7a of the back side member 3 is lowered from the upper end edge 8 of the back side member 3, but not limited thereto, the first leg elastic member 13, the ventral connection elastic member 25b, the waist elastic member 12, Alternatively, the non-elastic region P1 may be used alone or in combination as appropriate.

  As shown in FIGS. 7 and 9, when the disposable diaper 1 is worn, the upper end edge 7 of the ventral member 2 is below the navel line A of the wearer. The upper edge 7 of the ventral member 2 descends from the joints 5a and 5b according to the angle of the line B passing through the upper anterior iliac spine from the wearer's iliac crest, and the central portion 7a of the upper edge 7 is The lowest part. Thereby, since the waist circumference elastic member 12 of the abdominal member 2 does not pass the circumference of the navel, the disposable diaper 1 does not press the circumference of the navel. Moreover, since the waist opening part 6 is hung on the iliac crest and the disposable diaper 1 stops, a wearing position is stabilized. Moreover, since the leg-holes elastic member 13 is easy to return to the original position by hitting the leg which the wearer moved, the wearing position of the disposable diaper 1 is stabilized. The disposable diaper 1 does not protrude from the trousers or the skirt because the crotch, particularly the abdomen's crotch, is short. Moreover, since the area which covers a wearer's belly side is small, the disposable diaper 1 has a good wearing feeling, and can be manufactured with few materials.

  As shown in FIGS. 1 and 2, the non-elastic region P <b> 1 having a substantially triangular shape having a vertex on the upper end edge 7 side of the abdominal side member 2, and the substantially home base tapered on the upper end edge 8 side of the back side member 3. The inelastic region P3 having a shape shortens the length of the portion having the tension of the waist elastic member 12 from the waist opening 6 toward the lower leg openings 9a and 9b. The tension in the surrounding direction is weakened. Therefore, the ventral member 2 and the dorsal member 3 have a shape in which the waist opening 6 contracts and widens from the waist opening 6 toward the lower leg openings 9a and 9b. Thereby, as shown in FIG.7 and FIG.8, the disposable diaper 1 fits well into the body shape which becomes wide toward a base of both legs from a waist circumference of a wearer, and even if a wearer takes a sitting position or a forward bending posture. The lowering of the waist opening 6 is suppressed. Moreover, as shown in the rear view of FIG. 8, when the disposable diaper 1 is worn by the wearer, the dorsal member 3 has an upper edge 8 that is substantially below the horizontal line AA around the navel of the wearer. It is located horizontally and covers the wearer's pelvis.

  As shown in FIG. 9, when the disposable diaper 1 is worn, it is surrounded by the upper edge 7 of the abdominal member 2 and the upper edge 8 of the dorsal member 3 with respect to the horizontal line AA around the wearer's navel. The formed waist opening 6 is an oblique line in which the central portion 7a of the upper edge 7 of the ventral member 2 is lowered in accordance with the angle of the line B passing from the iliac crest to the upper anterior iliac spine. . Further, the waist elastic member 12 of the abdominal member 2 has a higher tension than the waist elastic member 12 of the back member 3, so that the wearer's vertical center line ZZ is The joint 5b between the ventral member 2 and the dorsal member 3 is an oblique line with the upper end on the ventral side and the lower end on the dorsal side. Further, the upper and lower lengths, that is, the crotch is short near the boundary between the abdominal member 2 and the crotch member 4, and the upper and lower lengths, that is, the crotch of the central portion of the back side member 3 are long. 3, the leg opening 9b formed by the lower end edge 11 is an oblique line. Thus, the disposable diaper 1 is worn obliquely with respect to the wearer's center line ZZ, shortening the rise of the abdominal member 2, while increasing the rise of the dorsal member 3, Both of the crests can be made as long as necessary, sufficient and without waste.

Next, the manufacturing method of the disposable diaper 1 of this embodiment is demonstrated.
As shown in FIG. 3, first, the elastic members 12, 13, and 14 are appropriately disposed and bonded to the inner sheet 101 or the outer sheet 102. At this time, an adhesive or the like may be applied to the surface of each thread-like elastic member, or an adhesive may be applied to the surface of the inner sheet 101 and the outer sheet 102 between the elastic members by spray coating or the like. Good. Each thread-like elastic member is joined to the inner surface sheet 101 and the outer surface sheet 102 in a state where the elastic members are stretched according to necessary tension. Next, the inner sheet 101 and the outer sheet 102 are bonded to each other with the elastic members 12, 13, 14 interposed therebetween to form a laminate. Next, the laminated body is processed to eliminate the tension of a part of the elastic member 12, 13, or 14 to form the non-elastic regions P1, P2, P3. As processing for eliminating the tension of the elastic member, for example, cutting of the elastic member with a large number of convex portions or cutter blades, heat sealing, or the like may be selected as appropriate. Next, the laminate is cut along a cutting line C, and is cut into the abdominal member 2 and the back member 3.

  Next, as shown in FIG. 4, the interval between the ventral member 2 and the dorsal member 3 is increased. Next, one end of the crotch member 4 is joined to the ventral member 2 and the other end is joined to the back member 3 by an adhesive such as hot melt. Thereby, the disposable underwear 1 in a stretched state is formed as shown in FIG. Next, the crotch member 4 is folded in two so that the inner sheet 101 of the abdominal member 2 and the back member 3 is inside, and the abdominal member 2 and the back member 3 are overlapped. Next, joint portions 5a and 5b are formed by heat sealing, ultrasonic sealing, adhesive (hot melt) or the like along both ends of the overlapped belly member 2 and back member 3, and the belly member 2 and the back member 3 are joined. Furthermore, when the laminated body is a laminated body in which the ventral member 2 and the back member 3 are continuous in the same direction in the flow direction, the laminated body is cut along the joint portions 5a and 5b. In this way, the disposable diaper 1 is manufactured. In addition, before forming the junction part along the both ends of the abdominal member 2 and the back member 3, the abdominal member as a part of the junction part, overlapping with the part of the junction part, or around the junction part It may be added to form positioning joints K1 and K2 that partially join 2 and the back member 3 together.

  As described above, according to the present embodiment, it is possible to provide a disposable diaper 1 that has a short rise, does not press around the wearer's navel, has a stable wearing position, and saves resources.

(Second Embodiment)
Next, a disposable underwear according to another embodiment of the present invention will be described.
FIG. 10 is a development view of the disposable diaper 30 according to the present embodiment with the elastic member extended. Constituent elements having the same structure and function as those of the above-described embodiment are denoted by the same reference numerals, or redundant descriptions are omitted as appropriate. The disposable diaper 30 of the present embodiment is the same as the disposable diaper 1 of the above-described embodiment except that the shapes of the inelastic regions P31, P32, and P33 are different.

  Unlike the disposable diaper 1 of the above-described embodiment, the disposable diaper 30 of the present embodiment has the apex of the triangle of the non-elastic region P31 located at the lower part of the center of the elastic member 13 around the first leg. The upper part of the center of each of the surrounding elastic member 13 and the waist elastic member 12b is not divided. Further, the widths of the inelastic regions P31, P32, and P33 extend beyond the maximum width portion of the absorbent body 20 to the vicinity of the left and right end edges 4a and 4b of the crotch member 4. Further, the apex of the triangular portion of the home base-shaped inelastic region P33 is formed so as to protrude beyond the absorbent body 20 and the ventral end edge 4d of the crotch member 4.

  In the disposable diaper 30, since the upper part of the center of the first leg elastic member 13 is not divided by the non-elastic region P31, the tension of the first leg elastic member 13 which is not divided is the first leg elastic member 13. Since it works so that it may extend linearly from the lower part of the left joint part 5a to the lower part of the right joint part 5b, the force which pulls down the center part of the abdominal member 2 becomes stronger than the non-elastic area P1 of the disposable diaper 1. On the other hand, there is also a waist elastic member 12b that is not divided by the non-elastic region P31. By appropriately adjusting the balance between the two, in the disposable diaper 30, the central portion 7 a of the upper end edge 7 of the abdominal member 2 is lowered from the upper end edge 8 of the dorsal member 3.

  Compared with the disposable diaper 1, the disposable diaper 30 has the widths of the non-elastic regions P31, P32 and P33 extending beyond the maximum width portion of the absorbent body 20 to the vicinity of the left and right end edges 4a and 4b of the crotch member 4. . The tension of all the elastic members 14 around the second leg extending in the region overlapping the crotch member 4 of the abdominal member 2 is eliminated by the non-elastic region P31, so that the connection portion between the abdominal member 2 and the crotch member 4 is reduced. Generation of wrinkles can be suppressed. Moreover, since the tension | tensile_strength of most elastic members of the central line 11C vicinity of the back side member 3 is lose | disappeared by the non-elastic area | region P32, the part connected to the back side member 3 of the crotch member 4 shrinks in a waistline direction. Is suppressed, and the wearer's buttocks can be covered widely. In addition, since the most elastic effects of the waist elastic members 12e and 12f extending to the portion overlapping the back side member 3 of the crotch member 4 are lost by the non-elastic region P33, the crotch member 4 and the absorbent body 20 are contracted. Suppressing or deforming can be suppressed.

  The disposable diaper 30 is formed so that the apex of the triangular portion of the non-elastic region P33 protrudes beyond the absorbent body 20 and the ventral end edge 4d of the crotch member 4, so that the waist elastic of the back member 3 is elastic. The left and right widths and vertical ranges of the portions where the tension of the members 12e and 12f is lost are increased. For this reason, the back side member 3 increases in the degree that the tension of the waist elastic member 12 becomes weaker from the waist opening 6 toward the leg openings 9a and 9b. It becomes easier to have a shape that widens from 6 toward the leg openings 9a, 9b.

  In the disposable diaper 1 and the disposable diaper 30, the central line 10c and the central line 11c in the region where the crotch member 4 of the abdominal member 2 and the dorsal member 3 overlap each other are straight lines parallel to the waistline direction. The center line 10c of the ventral member 2 is formed in a curved shape that gently protrudes toward the upper edge 7 and the center line 11c of the dorsal member 3 coincides with the center line 10c when abutting. In this way, the back member 3 may be formed in a curved shape that gently protrudes on the opposite side to the upper end edge 8. The disposable diaper 30 and the modified example described above can be manufactured by the same manufacturing method as the disposable diaper 1 described above.

(Third embodiment)
Next, a disposable underwear according to still another embodiment of the present invention will be described.
FIG. 11 is a development view of the disposable diaper 60 of the present embodiment in a state where the elastic member is extended. Constituent elements having the same structure and function as the disposable diaper 1 of the above-described embodiment are given the same reference numerals, or redundant descriptions are omitted as appropriate. The disposable diaper 60 of this embodiment differs in the shape of the lower end edge 66 of the abdominal side member 62 and the lower end edge 67 of the back side member 63 compared with the disposable diaper 1 of above-mentioned embodiment, The waist circumference of the abdominal side member 62 The number of components of the elastic member 12 is different, the first leg elastic member 68 and the second leg elastic member 69 are different, and the shapes of the inelastic regions P61, P62, and P63 are different.

  As shown in FIG. 11, the disposable diaper 60 of this embodiment is provided with the abdominal side member 62, the back side member 63, and the crotch member 4, and the abdominal side member 62 and the back side member 63 are joined by both joining parts 5a and 5b. Is done. A waist opening 6 is formed surrounded by the upper end edge 7 of the ventral member 62 and the upper end edge 8 of the dorsal member 63. The lower end edge 66 of the ventral member 62, the lower end edge 67 of the dorsal member 63, and the crotch Left and right leg openings are formed surrounded by the left edge 4a or the right edge 4b of the member 4. The waist elastic member 12 extends to the ventral member 62 and the back member 63, and the first leg elastic member 68 extends to the left and right leg openings of the ventral member 62. Elastic members 69 around the second leg extend in the left and right leg openings. The crotch member 4 includes an absorber 20, a crotch elastic member 25, and the like.

  In the disposable diaper 60 of the present embodiment, the lower end edge 66 of the abdominal member 62 gradually rises from a pair of substantially parallel both end lines 66a, 66a and from the both end lines 66a, 66a to the left and right end portions 4a, 4b of the crotch member 4. Of the disposable diaper 1 in that it comprises a pair of inclined lines 66b, 66b, a substantially parallel central line 66c, and curved lines 66d, 66d that gently curve and descend from the inclined lines 66b, 66b to the central line 66c. It differs from the lower end edge 10 of the ventral member 2. In the disposable diaper 60, the inclination of the inclined lines 66b and 66b is steeper than that of the disposable diaper 1. The crotch at the intersection of the curved lines 66d, 66d and the left and right ends 4a, 4b of the crotch member 4, that is, the distance between the upper edge 7 and the lower edge 66 is shorter than that of the disposable diaper 1. Therefore, the disposable diaper 60 is easy to move the wearer's leg when worn.

  The disposable diaper 60 has a first leg elastic member 68 extending from the joints 5a and 5b of the abdominal member 62 to the lower center of the waist elastic member 12a and extending above the crotch member 4, so that the disposable diaper It extends to a position closer to the upper end edge 7 than the elastic member 13 around the first leg. The arrangement | positioning space | interval of each thread-like elastic member which comprises the 1st leg periphery elastic member 68 is wider than the thing of the disposable diaper 1. FIG. Further, the first leg elastic member 68 has a non-elastic region P61 formed only at the lower end thereof. Therefore, the tension | tensile_strength which works so that the 1st leg periphery elastic member 68 may extend linearly from the lower part of the left junction part 5a to the lower part of the right junction part 5b is stronger than the disposable diaper 1 and the disposable diaper 30 of each embodiment mentioned above. Therefore, the force which pulls down the center part 7a of the upper end edge 7 of the abdominal side member 62 becomes still stronger.

  On the other hand, in the disposable diaper 60, the number of thread-like elastic members constituting the waist elastic members 12b and 12c of the abdominal member 62 is smaller than that of the disposable diaper 1 one by one. Therefore, the tension of the waist elastic member 12 of the abdominal member 62 is weaker than that of the disposable diaper 1. Therefore, compared to the disposable diaper 1 and the disposable diaper 30, the disposable diaper 60 can be configured such that the central portion 7 a of the upper end edge 7 of the abdominal member 62 is lower than the upper end edge 8 of the dorsal member 63. The disposable diaper 60 can be manufactured by the same manufacturing method as the disposable diaper 1 described above.

(Fourth embodiment)
Next, a disposable underwear according to still another embodiment of the present invention will be described.
FIG. 12 is a development view of the disposable diaper 70 of the present embodiment in a state where the elastic member is extended. Constituent elements having the same structure and function as the disposable diaper 1 of the above-described embodiment are given the same reference numerals, or redundant descriptions are omitted as appropriate. As shown in FIG. 4, the disposable diaper 1 according to the embodiment described above has a shape in which the abdominal member 2 in an extended state is rectangular and one long side is recessed in a substantially trapezoidal shape inside. On the other hand, as shown in FIG. 12, in the disposable diaper 70 of the present embodiment, the ventral member 72 has a substantially rectangular shape.

  As shown in FIG. 12, the disposable diaper 70 of the present embodiment includes an abdominal member 72, a back member 3, and a crotch member 4. The ventral member 72 and the dorsal member 3 are joined at both joints 5a and 5b. A waist opening 6 is formed surrounded by the upper edge 7 of the abdominal member 72 and the upper edge 8 of the back member 3. Left and right leg openings are formed by being surrounded by the lower end edge 76 of the abdominal side member 72, the lower end edge 11 of the back side member 3, and the left and right side edges 4 a and 4 b of the crotch member 4. A waist elastic member 12 extends on the abdominal member 72 and the back member 3, and a second leg elastic member 79 extends on the left and right leg openings of the back member 3. The crotch member 4 includes an absorber 20, a crotch elastic member 75, and the like.

  The first elastic member 78 in the disposable diaper 70 does not extend to the left and right leg openings of the abdominal member 72, but is on the upper edge 7 side from each joint 5a, 5b of the abdominal member 72 to the center in the waistline direction. Ascend to and extend. The first elastic member 78 is raised above the crotch member 4 of the abdominal member 72, and a part of the first elastic member 78 is divided by a non-elastic region P71 having a taper shape having a vertex on the upper edge 7 side. It has only been done. Since the tension | tensile_strength of the 1st elastic member 78 which is not divided | segmented works so that the 1st elastic member 78 may extend linearly from the lower part of the left junction part 5a to the lower part of the right junction part 5b, the disposable diaper 70 is a ventral member. The force to pull down the central portion 7 a of the upper end edge 7 of 72 is stronger than that of the disposable diaper 1. Therefore, in the disposable diaper 70, the central portion 7 a of the upper end edge 7 of the abdominal member 72 can be further lowered than the upper end edge 8 of the dorsal member 3.

  The disposable diaper 70 is a taper-shaped home base-shaped non-elastic region P71 having a vertex on the upper end edge 7 side of the ventral member 72, a rectangular inelastic region P72, and the upper end edge 8 side of the dorsal member 3 A non-elastic region P73 having a home base shape, which is a tapered shape having an apex, is wider than the maximum width of the absorbent body 20 and extends to the vicinity of the left and right end edges 4a, 4b of the crotch member 4. The left and right widths of the portions where the tension of the waist elastic member 12 of the back side member 3 of the abdominal side member 72 and the back side member 3 is eliminated by the non-elastic regions P71 and P73 are larger than those of the disposable diaper 1. Accordingly, the disposable diaper 70 can be formed such that the abdominal member 72 and the dorsal member 3 further expand from the waist opening 6 toward the lower leg openings 9a, 9b.

  In the disposable diaper 70, the waist elastic member 12 c of the abdominal member 72 extends to lower end edges 76 that form the left and right leg openings of the abdominal member 72. An elastic member 79 around the second leg extends on the lower end edge 11 forming the left and right leg openings of the back side member 3. Of the left and right side edges 4 a and 4 b of the crotch member 4, the length of the portion forming the left and right leg openings of the crotch member 4 is shorter than the length of the portion of the disposable underwear 1. Accordingly, the crotch elastic member 75 of the crotch member 4 of the disposable diaper 70 is also short. The left and right leg openings formed by being surrounded by the abdominal member 72, the dorsal member 3, and the crotch member 4 are smaller than those of the disposable diaper 1. The disposable diaper 70 has a possibility that it is difficult to move the leg, but the adhesion is increased, and the large area of the abdominal member 72 is combined, and thus the prevention of leakage of excrement and the like is improved.

  Each of the above-described embodiments and modifications can be combined as appropriate, but detailed description thereof will be omitted. Further, the present invention is not limited to the embodiments and modifications described above. For example, the disposable undergarment according to the present invention may be a pad holder that has no absorbent body inside the crotch member and is used with an absorbent pad provided with the absorbent body.

  INDUSTRIAL APPLICABILITY The present invention is useful for commercializing a pants-type disposable diaper or pad holder that has a short crotch, does not press around the navel, and has a stable wearing position.

DESCRIPTION OF SYMBOLS 1,30,60,70 Disposable underwear 2,62,72 Abdominal side member 2c Center part 3,63 Back side member 3c Center part 4 Crotch member 5a, 5b Joint part 6 Waist opening part 7 Upper end edge of abdominal side member 7a Abdomen The center part of the upper end edge of the side member 8 The upper end edge of the back side member 9a, 9b The left and right leg openings 10, 66, 76 The lower end edge of the abdominal side member 11, 67 The lower end edge of the back side member 12 The waist elastic member 13, 68, 78 First elastic member (elastic member around the first leg)
14, 69, 79 Second leg elastic member 25b, 75b Ventral connecting elastic member P1, P2, P3, P31, P32, P33, P61, P62, P63, P71, P72, P73 Inelastic region

In the disposable underwear according to still another aspect of the present invention, the lower end edge of the ventral member is a pair of both end lines substantially parallel to the waistline direction and a pair of ascending toward the upper end edge from the both end lines toward the central portion. and the inclined line, and a central line connecting between the inclined lines, the lower edge of the back side member, said upper edge in accordance with both end line substantially parallel to the waist direction, from the opposite ends lines toward the central portion A pair of inclined lines descending to the opposite side and a central line connecting the inclined lines are included.

In order to solve the above-mentioned problem, the disposable underwear of the present invention includes a ventral member and a dorsal member that are joined to each other at both joints along both ends in the waistline direction, and the ventral member and the dorsal member. A crotch member that is bridged and joined to both central portions; a waist opening that is surrounded by both upper edges of the ventral member and the dorsal member; the ventral member and the dorsal member; Left and right leg openings formed surrounded by the crotch member, waist elastic members extending in the waist direction of the belly member and the back member, and the joints of the belly member A first elastic member extending upward toward the upper edge from the lower part of the waist part to the center in the waist direction, and extending from the waist opening toward the lower left and right leg openings, The center of the upper edge of the side member is lowered from the upper edge of the back member. .

Claims (8)

A ventral member and a back member that are joined together at both joints along both ends in the waistline direction;
A crotch member that is bridged and joined to both central portions of the ventral member and the dorsal member;
A waist opening formed surrounded by both upper edges of the ventral member and the dorsal member;
The left and right leg openings formed by being surrounded by the ventral member, the dorsal member and the crotch member,
It is a shape that widens from the waist opening toward the lower left and right leg openings,
A disposable underwear, wherein a central portion of an upper end edge of the ventral member is lowered from an upper end edge of the back member. A waistline elastic member extending in a direction around each waist of the ventral member and the backside member;
The disposable underwear according to claim 1, further comprising a first elastic member extending upward from the lower portion of each joint portion of the ventral member to the center in the waist direction toward the upper edge.   The waist elastic member extending in the waist direction of the abdomen member has a higher tension than the waist elastic member extending in the waist direction of the back member. Disposable underwear.   The non-elastic region in which the tension of the elastic member in the region disappears is formed in a tapered shape having a vertex on the upper edge side in the center of the waist side direction of the ventral member. Disposable underwear.   5. The non-elastic region in which the tension of the elastic member in the region disappears is formed in a tapered shape having an apex on the upper edge side in the center of the waist side direction of the back member. Disposable underwear.   The crotch member includes at least a pair of ventral connection elastic members, and a ventral end portion of a portion joined to the crotch member of the ventral connection elastic member is overlapped with the ventral member of the crotch member. And the back end portion of the portion to be joined to the crotch member of the ventral connection elastic member does not overlap with the region to be joined to the back side member of the crotch member. The disposable underwear of Claim 1 characterized by these. The lower end edge of the abdomen side member includes both end lines that are substantially parallel to the waistline direction, a pair of inclined lines that rise toward the upper end edge side from the both end lines toward the center, and a center line that connects the end lines. Including
The lower end edge of the dorsal member includes both end lines substantially parallel to the waistline direction, a pair of inclined lines descending to the opposite side from the upper end edge as it goes from the both end lines to the long recess, and between the both end lines. The disposable underwear according to claim 1, further comprising a connecting central line.   The lower end edge of the abdominal member coincides with the lower end edge of the dorsal member in a state where the abdominal member and the dorsal member are separated and extended. Disposable underwear according to 1.

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