JP6412863B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article.

  Conventionally, as an absorptive article which absorbs excrement, for example, in patent documents 1, in one side of the width direction, a side part of a front waist part (front body) and a side part of a back waist part (back body) are included. A so-called single-open pants-type diaper in which the front waistline portion and the rear waistline portion are not joined on the other side in the width direction is disclosed.

  This single-open pants-type diaper has a front locking part (fastening tape) protruding from the other side in the width direction of the rear waistline part on the open side where the front waistline part and the rear waistline part are not joined. Used by locking to the waistline.

JP 2008-104874 A

  Since the baby who is a wearer has the stomach sticking out forward, the front side (abdominal side) of the worn diaper is likely to slip down due to the protrusion of the baby's stomach. In particular, the diaper with a single-opening pant as disclosed in Patent Document 1 is such that, on the open side, the locking portion is only locked to the front waistline portion, so the lower side of the front side is particularly low on the open side. It is easy to fall off, and the diaper's wearability may deteriorate.

  The present invention has been made in view of the above-mentioned problems, and the object of the present invention is to wear a single-open pant-type diaper while suppressing the downward displacement on the open side when worn. It is to improve the property.

The main invention for achieving the above object is:
A longitudinal direction, a transverse direction intersecting the longitudinal direction, and a longitudinal direction intersecting the longitudinal direction and the transverse direction,
A front waistline portion along the lateral direction;
A rear waistline portion along the lateral direction;
A crotch portion provided between the front waistline portion and the rear waistline portion;
An absorbent article comprising:
An end portion on one side of the rear waistline portion in the lateral direction and an end portion on one side of the front waistline portion in the lateral direction are joined by a first joint portion,
A locking member having a locking portion that can be locked to the front waistline portion when worn is provided at the other end of the rear waistline portion in the lateral direction so as to protrude in the lateral direction.
The other end portion of the rear waistline portion in the lateral direction and the locking member are joined by a second joint portion,
The one side of the front waistline portion has elasticity, and the other side of the front waistline portion does not have elasticity,
In the lateral direction, the front waistline portion is arranged such that an end of the locking portion on the side of the second joint portion is located at an end of the crotch portion on the side opposite to the first joint portion. In the state where the locking part is locked,
Said 2nd junction part is located in the front side rather than the position of said 1st junction part, It is an absorbent article characterized by the above-mentioned.
Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

  ADVANTAGE OF THE INVENTION According to this invention, in a single-opening pants-type diaper, the position shift to the downward side of the open side can be suppressed during wearing, and the wearability can be improved.

It is a schematic perspective view which shows one structural example of the diaper which concerns on embodiment of this invention. It is the schematic plan view which looked at the developed diaper from the skin side of a wearer. 3A is a schematic cross-sectional view of the front waistline portion, FIG. 3B is a schematic cross-sectional view of the back waistline portion, and FIG. 3C is a schematic cross-sectional view of the locking member. It is explanatory drawing explaining the elastic area | region X and the elastic area | region Y. FIG. FIG. 5A is a diagram showing how the diaper is used, FIG. 5B is a diagram of the diaper in a worn state as viewed from the side, and FIG. 5C is a diagram of the diaper in the worn state as viewed from the front. It is explanatory drawing which shows a mode at the time of wearing the diaper which concerns on a comparative example. FIG. 7A is a schematic plan view illustrating an example of the range of the target region and the position of the locking portion when worn, and FIG. 7B is a schematic diagram when the diaper in the state of FIG. 7A is viewed from above. It is a schematic plan view which shows the modification 1 about the range of a target area | region, and the position of the latching | locking part at the time of wear. FIG. 9A is a schematic plan view showing a second modification of the range of the target region and the position of the locking portion when worn, and FIG. 9B is a schematic diagram when the diaper in the state of FIG. 9A is viewed from above. is there.

  At least the following matters will become apparent from the description of the present specification and the accompanying drawings.

  A longitudinal direction, a lateral direction intersecting with the longitudinal direction, a longitudinal direction and a front-rear direction intersecting with the lateral direction, and a front waistline portion along the lateral direction, and a rearward direction along the lateral direction An absorbent article comprising a waistline portion, and a crotch portion provided between the front waistline portion and the rear waistline portion, and an end portion on one side of the rear waistline portion in the lateral direction; One end of the front waistline portion in the lateral direction is joined by a first joint, and the other end of the rear waistline in the lateral direction is connected to the front waistline when worn. A locking member having a locking portion that can be locked to the side is provided so as to protrude in the lateral direction, and the other end of the rear waistline portion in the lateral direction and the locking member are Are joined by two joints, and in the lateral direction, In the state where the locking portion is locked to the front waistline portion so that the end on the second bonding portion side is located at the end of the crotch portion on the side opposite to the first bonding portion, As for the 2nd junction part, the absorptive article located in the front side of the position of the 1st junction part becomes clear.

  According to such an absorbent article, at the time of wearing, since the 2nd joined part is located in the front side (abdominal side) rather than the position of the 1st joined part, the 2nd joined part which has rigidity is below. Therefore, the downward displacement due to the protrusion of the wearer's stomach is suppressed, and the wearability is improved.

  In this absorbent article, it is preferable that the second joint portion is provided along the longitudinal direction at the other end portion of the rear waistline portion.

  According to such an absorbent article, since the second joint portion is provided long along the vertical direction, it functions as a rod that supports the force of shifting downward, and the wearer's stomach The downward displacement due to the bulge can be further suppressed.

  In such an absorbent article, it is desirable that the rigidity of the second joint portion is larger than the rigidity of the front waistline portion.

  According to such an absorbent article, by making the rigidity at the second joint part larger than the rigidity at the front waistline part, the support to the downward displacement of the front waistline part becomes more reliable, and the wearer's stomach The downward displacement due to the bulge can be further suppressed.

  In such an absorbent article, it is preferable that the number of members overlapping in the second joint portion is greater than the number of members overlapping in the front waistline portion.

  According to such an absorbent article, since the number of members overlapping in the second joint portion is larger than the number of members overlapping in the front waistline portion, the second joint portion has a rigidity higher than that of the front waistline portion. Rigidity is increased and support for a downward displacement can be made more reliable without taking a method such as changing to a thicker member.

  In this absorbent article, the rear waistline portion has an elastic region that expands and contracts in the lateral direction at the other end, and the second joint portion of the locking portion in the lateral direction. In the state where the locking portion is locked to the front waistline portion so that the end on the side of the crotch is located at the end of the crotch opposite to the first joint portion, the elastic region is It is desirable to have a part located in front of the position of the 1st joined part.

  According to such an absorbent article, at the time of wearing, the elastic region of the rear waistline portion has a portion located on the front side (abdominal side) with respect to the first joint portion, thereby to the skin side of the wearer. The elastic force acts so as to push it toward the side, and the wearability on the ventral side is improved.

  In this absorbent article, the front waistline portion is between the center of the crotch portion in the lateral direction and the end of the crotch portion in the lateral direction opposite to the first joint portion. The locking portion is provided on the front waistline portion so as to have a target region for locking the locking portion, and the horizontal center of the locking portion is located at the horizontal center of the target region. In the state in which the second joint portion is locked, it is desirable that the second joint portion is located on the inner side of the end of the crotch portion opposite to the first joint portion in the lateral direction.

  According to such an absorbent article, at the time of wearing, the second joint portion is located on the inner side in the lateral direction from the end of the crotch portion, that is, the second joint portion is located around the wearer's leg. Since there is not, a 2nd junction part with high rigidity does not touch a wearer's leg directly, and a touch becomes favorable.

=== Embodiment ===
As an example of an absorbent article according to an embodiment of the present invention, a single-open pants-type disposable diaper 1 (hereinafter simply referred to as diaper 1) will be described.

<Configuration of diaper 1>
The structure of the diaper 1 is demonstrated with reference to FIGS.

  Drawing 1 is an outline perspective view showing one example of composition of diaper 1 concerning an embodiment. FIG. 2 is a schematic plan view of the unfolded diaper 1 as viewed from the skin side of the wearer. 3A is a schematic sectional view of the front waistline portion 30, FIG. 3B is a schematic sectional view of the rear waistline portion 20, and FIG. 3C is a schematic sectional view of the locking member 40. FIG. 4 is an explanatory diagram for explaining the elastic region X and the elastic region Y. FIG.

  The diaper 1 is a disposable diaper mainly for newborns, infants and the like, and as shown in FIG. 1, a “vertical direction”, a “horizontal direction” intersecting the vertical direction, a vertical direction and a horizontal direction. And the “front-rear direction” intersecting with Of the longitudinal direction, the torso side of the wearer is referred to as “upper side”, and the inseam side of the wearer is referred to as “lower side”. Among the front and rear directions, the side that becomes the abdomen side of the wearer is referred to as “front side”, and the side that is the back side of the wearer is referred to as “rear side”. Further, in a state where the wearer wears the diaper 1, the side in contact with the wearer's skin is defined as “skin side”, and the opposite side is defined as “non-skin side”. Further, in the following description, the left side in the horizontal direction of the figure is referred to as “one side” and the right side is referred to as “the other side” (see FIGS. 2 and 4).

  The diaper 1 includes an absorbent main body 10 (also referred to as “inseam”) that is disposed in the crotch of the wearer and absorbs excrement, a rear waistline portion 20 that covers the back of the wearer, and the abdomen of the wearer And a front waistline portion 30 for covering. A locking member 40 having a locking portion 41 that can be locked to the front waistline portion 30 when the diaper 1 is worn is provided at the other end of the rear waistline portion 20 so as to protrude in the lateral direction.

  The diaper 1 in the unfolded state shown in FIG. 2 is folded in half with the substantially central position in the vertical direction being the folding position, and the rear waistline portion 20 and the front waistline portion 30 are the first joint portions at one end in the horizontal direction. By joining at 1b, one leg opening 1HL is formed. The rear waistline portion 20 and the front waistline portion 30 are not joined at the other side end in the lateral direction, and the locking portion 41 is locked to the front waistline portion 30, so that An opening 1HL and a waistline opening 1HB are formed.

  That is, the diaper 1 of the present embodiment is a so-called “one piece” in which the rear waistline portion 20 and the front waistline portion 30 are joined and closed on one side in the horizontal direction, and the other side is opened without being joined. Open-type diapers ". Hereinafter, the side (the other side in the horizontal direction) where the rear waistline portion 20 and the front waistline portion 30 are open without being joined is also referred to as the “open side”.

  The rear waistline portion 20 and the front waistline portion 30 have a substantially rectangular planar shape, and the rear waistline portion 20 is fixed to one end portion 10 a in the longitudinal direction of the absorbent main body 10, and the other end in the longitudinal direction of the absorbent main body 10. The front waistline portion 30 is fixed to the portion 10b. That is, the absorbent main body 10 is bridged between the rear waistline portion 20 and the front waistline portion 30, and the rear waistline portion 20 and the front waistline portion 30 are parallel to each other in the longitudinal direction of the absorbent body 10. Is arranged.

  The region of the one end portion 10a in the longitudinal direction of the absorbent main body 10 is a region (first region) where the absorbent main body 10 and the rear waistline portion 20 overlap each other, and is surrounded by A-B-C-D shown in FIG. This is a rectangular area. Moreover, the area | region of the other end part 10b of the longitudinal direction of the absorptive main body 10 is an area | region (2nd area | region) with which the absorptive main body 10 and the front waistline part 30 overlapped, and it is FGH shown in FIG. A rectangular region surrounded by I.

(Absorbent body 10)
The absorptive main body 10 (crotch part) has a substantially rectangular shape in plan view, and is disposed at the center in the lateral direction with its longitudinal direction being along the longitudinal direction of the diaper 1. 2 and 4, a center line AC (indicated by a one-dot chain line) is a center in the lateral direction of the absorbent main body 10.

  The absorbent main body 10 includes an absorbent body 11 that absorbs and holds a liquid, a liquid-permeable surface sheet 12 that allows excretion such as urine to pass through while covering the absorbent body 11 from the skin side of the wearer, and the absorbent body 11. And a liquid-impermeable back sheet 13 that prevents leakage of liquid from the non-skin side while covering from the non-skin side. The absorbent body 11 is formed by molding liquid absorbent fibers such as pulp fibers into a predetermined shape such as a substantially hourglass shape in a plan view as shown in FIG. 2, and a superabsorbent polymer is mixed therein. .

  Further, in order to prevent lateral leakage and improve the fit around the legs, leg gathers that extend and contract along the longitudinal direction of the absorbent main body 10 are located on both sides of the absorbent main body 10 in the lateral direction. LG (leg extension / contraction section) is provided, but for the sake of convenience, illustration is omitted in FIG.

(Rear waistline 20)
As shown in FIG. 3B, the rear waistline portion 20 includes a skin side member 21 positioned on the skin side of the wearer, a non-skin side member 22 positioned on the non-skin side, a skin side member 21, and a non-skin side member 22. A plurality of thread rubbers 23 positioned between the two. The non-skin side member 22 has its upper end folded back toward the skin, and covers the upper end of the skin side member 21 and the upper end of the absorbent main body 10.

  The skin side member 21 and the non-skin side member 22 are flexible sheet members, such as a nonwoven fabric, respectively. The rubber thread 23 is an elastic member that imparts lateral stretchability to the rear waistline portion 20. In the present embodiment, a plurality of thread rubbers 23 arranged at predetermined intervals in the vertical direction are joined between the skin-side member 21 and the non-skin-side member 22 by an adhesive or the like while being stretched in the horizontal direction. .

  A center line RC indicated by a one-dot chain line in FIGS. 2 and 4 indicates the center of the rear waistline portion 20 in the horizontal direction. A first joining region 20j is provided at one end of the rear waistline portion 20, and is joined to a joining region 30j (described later) of the front waistline portion 30 using a predetermined joining means such as heat welding or ultrasonic welding. Thereby, the 1st junction part 1b of the diaper 1 is formed. Further, a second joining region 40j to which the locking member 40 is joined is provided at the other end of the rear waistline portion 20.

  In the lower end portion of the rear waistline portion 20, on one side in the lateral direction, the slope is inclined obliquely downward from the lateral end 20el on one side in the lateral direction toward the inner side in the lateral direction (the side on which the absorbent main body 10 is disposed). Part 20bl. Further, at the lower end portion of the rear waistline portion 20, a straight line formed on the other side in the horizontal direction from the horizontal end 20er on the other side in the horizontal direction toward the inner side in the horizontal direction and substantially parallel to the lower end 30b of the front waistline portion 30. Part 20bs and an inclined part 20br inclined obliquely downward from the straight part 20bs toward the inner side in the horizontal direction. The inclined portion 20bl on one side in the horizontal direction and the inclined portion 20br on the other side in the horizontal direction are formed symmetrically about the horizontal center line AC of the absorbent main body 10.

  Thus, when the back waistline part 20 has the linear part 20bs formed substantially parallel to the lower end 30b of the front waistline part 30, when the locking part 41 is locked to the front waistline part 30, that is, the diaper 1 Since the lower end 30b of the front waistline portion 30 and the straight portion 20bs of the rear waistline portion 20 can be aligned in the worn state, the appearance of the diaper 1 in the worn state is improved. The horizontal length L2 of the inclined portion 20br on the other side in the horizontal direction is set to be longer than the horizontal length L1 of the inclined portion 20bl on the one side in the horizontal direction (L2> L1). The inclination angle of the inclined portion 20br may be made gentler than the inclination angle of the one inclined portion 20bl.

  The plurality of rubber threads 23 form an elastic region X to improve the fit of the diaper 1. Specifically, at the upper end portion of the rear waistline portion 20, the plurality of thread rubbers 23 are provided continuously from the horizontal end 20el on one side in the horizontal direction to the horizontal end 20er on the other side, and the vertical direction Are arranged at predetermined intervals. In a region overlapping the absorber 11 in the rear waistline portion 20, that is, in a central portion and a lower end portion in the longitudinal direction of the rear waistline portion 20, the lateral direction of the rear waistline portion 20 corresponding to the region where the absorber 11 is disposed. A plurality of thread rubbers 23 are not arranged in the central portion, and are substantially parallel to the left side (one side) region laterally from the absorber 11 and the right side (other side) region lateral to the absorber 11, respectively. A plurality of thread rubbers 23 are provided.

  Here, as shown in FIG. 4, it is provided on the other side in the lateral direction from the lateral inner side (the other side) end of the first bonding region 20j provided on the one side in the lateral direction of the rear waistline portion 20. Of the region up to the inner side (one side) end in the lateral direction of the second joining region 40j, the region where the plurality of rubber threads 23 are disposed is referred to as an elastic region X. In FIG. 4, the elastic region X is indicated by hatching. In FIG. 4, for convenience, hatching of the first bonding region 20j and the second bonding region 40j is omitted.

  As shown in FIGS. 2 and 4, the plurality of rubber threads 23 are arranged up to the lateral ends 20er and 20el on both sides in the lateral direction of the rear waistline portion 20, but the lateral ends of the rear waistline portion 20 are arranged. Since the bonding region 20j and the second bonding region 40j are provided in the respective parts, the first bonding region 20j, the outer side in the lateral direction than the first bonding region 20j, the second bonding region 40j, and the In a portion outside in the lateral direction from the second bonding region 40j, the expansion / contraction force cannot be substantially exhibited. Therefore, the range of the region along the horizontal direction of the elastic region X extends from the inner edge in the horizontal direction of the first bonding region 20j to the inner edge in the horizontal direction of the second bonding region 40j.

  One end Xe1 in the lateral direction of the elastic region X is at the same position as the lateral end on the inner side in the lateral direction of the first bonding region 20j, and the other end Xe2 in the lateral direction of the elastic region X is the second end. It is the same position as the lateral edge inside the joining region 40j in the lateral direction. In some cases, a plurality of thread rubbers 23 are also arranged in a region (inelastic region) other than the elastic region X shown by hatching in FIG. 4. In the inelastic region, the plurality of thread rubbers 23 are arranged. It is made not to express elasticity by being cut.

  As shown in FIG. 4, in the elastic region X, a distance L3 from one end Xe1 in the lateral direction to the center line AC is shorter than a distance L4 from the other end Xe2 in the lateral direction to the center line AC ( L3 <L4). Moreover, as shown in FIG.2 and FIG.4, the horizontal centerline BC has shown the position used as the approximate center of the body in the state in which the wearer put the one leg. In the present embodiment, the center line BC is the same position as the center line RC indicating the center of the rear waistline portion 20 in the horizontal direction. The lateral positions of the center lines RC and BC are different from the central line AC indicating the lateral center of the absorbent main body 10, and only a distance d is located on the right side (the other side) in the lateral direction from the central line AC. The position is shifted.

  In this case, the distance d between the center line RC of the rear waistline portion 20 and the center line AC of the absorbent main body 10 is the distance L4 on the other side in the lateral direction and the distance L3 on the one side in the elastic region X described above. (D <L4-L3). More preferably, the length (2d) that is twice the distance d is less than or equal to the difference between the distance L4 on the other side and the distance L3 on the one side (2d ≦ L4-L3), most preferably This is a case where the length twice the distance d is equal to the difference between the distance L4 on the other side and the distance L3 on the one side (2d = L4−L3).

(Locking member 40)
As shown in FIG. 3C, the locking member 40 includes a skin-side member 401 located on the wearer's skin side, a non-skin-side member 402 located on the non-skin side, a skin-side member 401, and a non-skin-side member 402. And an engaging portion 41 located on the skin side. The non-skin side member 402 has its upper end folded back toward the skin, and covers the upper end of the skin side member 401. The locking member 40 is joined to the second joining region 40j of the rear waistline portion 20 using a predetermined joining means such as heat welding or ultrasonic welding, whereby the second joining portion 2b of the diaper 1 is formed. .

  The skin side member 401 and the non-skin side member 402 are flexible sheet members, such as a nonwoven fabric, respectively. The locking portion 41 is a hook-and-loop fastener that is formed of, for example, polypropylene and has a plurality of locking protrusions (not shown) on the skin side. The locking member 40 is locked to the front waistline portion 30 by hooking the locking projection of the locking portion 41 on a target region 34 (described later) provided on the front waistline portion 30.

  The second joint portion 2b (second joint region 40j) is provided along the longitudinal direction, and the length H2 in the longitudinal direction is the longitudinal direction of the lateral end 20er on the other side in the lateral direction of the rear waistline portion 20. It is longer than half of the length H1 (H2> H1 / 2). In addition, the longitudinal length H1 of the lateral end 20er on the other lateral side of the rear waistline portion 20 is from the lower end of the longitudinal end portion 10a (first region) of the absorbent main body 10 to the other end portion 10b (first portion). Is smaller than half of the length H3 to the lower end of (region 2) (H1 <H3 / 2).

(Front waistline 30)
As shown to FIG. 3A, the front waistline part 30 is the skin side member 31 located in a wearer's skin side, the non-skin side member 32 located in the non-skin side, the skin side member 31, and the non-skin side member 32. And a plurality of thread rubbers 33 positioned between the two. The non-skin side member 32 has its upper end folded back toward the skin, and covers the upper end of the skin side member 31 and the upper end of the absorbent main body 10. Further, the end portion on one side (left side) in the lateral direction of the front waistline portion 30 has a joint region 30j, and the first joint portion 1b is joined to the first joint region 20j of the rear waistline portion 20 by joining. It is formed.

  The skin side member 31 and the non-skin side member 32 are flexible sheet members, such as a nonwoven fabric, respectively. The rubber thread 33 is an elastic member that imparts lateral stretchability to the front waistline portion 30. In the present embodiment, a plurality of thread rubbers 33 arranged at predetermined intervals in the vertical direction are joined between the skin-side member 31 and the non-skin-side member 32 by an adhesive or the like while being stretched in the horizontal direction. .

  On the non-skin side surface of the front waistline portion 30, a target region 34 that can be engaged with the locking portion 41 is provided. The target region 34 is formed by, for example, a member that processes the fibers on the surface of the non-woven fabric into a loop shape to easily engage the locking protrusion (hook) of the locking portion 41. The target region 34 and the front waistline portion 30 are not formed as different members, but the target region 34 is formed by processing a partial region of the non-skin side member 32 of the front waistline portion 30. Also good.

  The plurality of thread rubbers 33 improve the fit of the diaper 1 by forming an elastic region Y. The plurality of thread rubbers 33 are provided from the lateral end 30el on one side (left side) in the lateral direction of the front waistline portion 30 to a predetermined position on one side in the lateral direction from the center line AC. On the other hand, the plurality of rubber bands 33 are not provided between the lateral end 30er on the other side (right side) in the lateral direction of the front waistline portion 30 and the center line AC. As shown by the hatched portion in FIG. 4, a plurality of gaps between the lateral inner side edge of the junction region 30j and the lateral side one side (left side) of the target region 34 in the lateral direction one side (left side). A region where the rubber thread 33 is disposed is referred to as an elastic region Y.

  In some cases, a plurality of thread rubbers 33 are also arranged in a region (inelastic region) other than the elastic region Y shown by hatching in FIG. 4. In the inelastic region, the plurality of thread rubbers 33 are arranged. It is made not to express elasticity by being cut.

  As shown in FIG. 2, the distance L6 from the center line AC (the center position in the lateral direction of the absorbent main body 10) to the lateral end 30er on the other side in the lateral direction of the front waistline portion 30 is the centerline AC to the front waistline. It is shorter than the distance L5 to the horizontal end 30el on one side in the horizontal direction of the portion 30 (L6 <L5).

  The distance L6 on the other side of the front waistline portion 30 is shorter than the distance L8 from the lateral end 20er on the other side in the lateral direction of the rear waistline portion 20 to the center line AC (L6 <L8). In the lateral direction, the position of the lateral end 30el on the one side in the lateral direction of the front waistline portion 30 and the position of the lateral end 20el on the one side in the lateral direction of the rear waistline portion 20 are provided at substantially the same position. Therefore, the distance L5 from the lateral end 30el on one side of the front waistline portion 30 to the center line AC and the distance L7 from the lateral end 20el on the lateral side of the rear waistline 20 to the centerline AC are: , The same (L5 = L7). Due to the relationship between the distances L5, L6, L7, and L8, the lateral length of the front waistline portion 30 is shorter than the lateral length of the rear waistline portion 20. In the lateral direction, the lateral end 30er on the other side of the front waistline portion 30 is provided inside the lateral end 20er on the other side of the rear waistline portion 20.

  Further, the distance L6 from the lateral end 30er on the other side of the front waistline portion 30 to the center line AC is longer than the lateral length L9 of the locking member 40 (L6> L9). In addition, the magnitude relationship of the distance (length) L5, L6, L7, L8, L9 in a horizontal direction is in the state which extended the rear waistline part 20 and the front waistline part 30 to the horizontal direction. Here, the “stretched state” refers to a state in which the rear waistline portion 20 and the front waistline portion 30 are stretched in the horizontal direction. More specifically, until the lateral dimension of the rear waistline portion 20 is the same as the lateral dimension of the skin side member 21 and the lateral dimension of the non-skin side member 22 or a length close to these dimensions. The laterally extended state, and the lateral dimensions of the front waistline portion 30 are the same as or close to the lateral dimensions of the skin-side member 31 and the non-skin-side member 32. It means a state where it is stretched in the horizontal direction until it reaches.

<About the usage mode and wearing state of the diaper 1>
Next, the usage mode of the diaper 1 and the wearing state of the diaper 1 will be described with reference to FIGS.

  FIG. 5A is a diagram illustrating a usage mode of the diaper 1, FIG. 5B is a diagram of the diaper 1 in a worn state as viewed from the side, and FIG. 5C is a diagram of the diaper 1 in a worn state as viewed from the front. . FIG. 6 is an explanatory diagram illustrating a state where the locking portion 40 is locked to the front waistline portion 30 when the diaper according to the comparative example is worn. FIG. 7A is a schematic plan view showing an example of the range of the target region 34 and the position of the locking portion 41 when worn, and FIG. 7B is a schematic diagram when the diaper 1 in the state of FIG. 7A is viewed from above. It is. FIG. 8 is a schematic plan view showing a first modification of the range of the target region 34 and the position of the locking portion 41 when worn. FIG. 9A is a schematic plan view showing a second modification of the range of the target region 34 and the position of the locking portion 41 when worn, and FIG. 9B is a view of the diaper 1 in the state of FIG. 9A as viewed from above. It is a schematic diagram.

  As shown in FIG. 5A, the front waistline portion 30 and the rear waistline portion 20 are joined to each other at one end in the lateral direction of the diaper 1 by a first joint 1b to form a leg circumference opening 1HL. . On the other hand, the end portion on the other side in the horizontal direction is in an open state without the front waistline portion 30 and the rear waistline portion 20 being joined. That is, the diaper 1 is in a state where one side in the lateral direction is open.

  When such a diaper 1 is to be worn by a wearer (such as an infant), first, the wearer's leg (right leg) is placed in the leg opening 1HL formed on one side of the diaper 1 in the lateral direction. Then, the one leg is placed at the same position as the wearing state, that is, one leg leg opening 1HL is arranged at the base of the wearer's right leg. Then, the person who is going to wear it presses in the state which pulled the other end part of the front waistline part 30 to the other side of a horizontal direction with one hand. Then, while pulling the locking member 40 (the other side end portion of the rear waistline portion 20) to the other side in the horizontal direction with the other hand (indicated by an arrow in FIG. 5A), it is turned to the front side of the front waistline portion 30, The locking portion 41 is locked to the target region 34 of the front waistline portion 30. As a result, the leg opening 1HL on the other side is formed, and the waist opening 1HB is formed so that the diaper 1 is put on (see FIG. 5C).

  If it is such a wearing method, the leg part opening of the other side will be carried out by making the target part 34 latch the latching | locking part 41 in the state which let the wearer's one leg pass through the leg part opening part 1HL of one side. The part 1HL and the waistline opening 1HB can be formed simultaneously. Therefore, the diaper 1 can be easily worn even when a newborn baby or an infant who is a wearer has his legs fluttered.

  At this time, if the distance L3 from one end Xe1 in the lateral direction of the elastic region X to the center line AC of the absorbent main body 10 and the distance L4 from the other end Xe2 to the center line AC are the same length, By pulling the locking member 40, the rear waistline portion 20 extends in the lateral direction, the absorbent body 10 moves to the other side in the lateral direction, and the absorbent main body 10 is displaced from the approximate center of the wearer's body. There was a risk of excretion leaking or making the wearer feel uncomfortable.

  Therefore, in the diaper 1, in anticipation that the lateral center of the absorbent main body 10 is shifted from the approximate center of the wearer's body, the absorbent main body 10 starts from the lateral end Xe1 of the elastic region X. The distance L3 to the center line AC is shorter than the distance L4 from the other end Xe2 in the lateral direction to the center line AC (L3 <L4). Thus, when the locking member 40 is pulled to the other side in the lateral direction and the locking portion 41 is locked to the front waistline portion 30 to be transformed into the diaper 1 in the wearing state, the rear waistline portion 20 extends in the horizontal direction. Then, although the absorbent main body 10 moves to the other side (left leg side) in the lateral direction, since the center line AC approaches the center line BC, the absorbent main body 10 can be brought closer to the center of the wearer's body.

  The diaper 1 has a length different from a distance L3 from one end Xe1 in the lateral direction of the elastic region X to the center line AC of the absorbent main body 10 and a distance L4 from the other end Xe2 to the center line AC. Therefore, the distance L3 on one side is set to a length suitable for the leg opening 1HL corresponding to the size of one leg (in this embodiment, the right leg), and the leg circumference on one side is set. The fitting of the opening 1HL can be improved, and the leg-side opening 1HL of the other leg (the left leg in this embodiment) is adjusted by the locking of the locking part 41 to adjust the other leg. It is also possible to secure the fit of the opening 1HL.

  In the present embodiment, in the front waistline portion 30, a region from one end in the horizontal direction to the center line AC has an elastic region Y along the horizontal direction, and from the other end. The area up to the center line AC does not have an elastic area (does not have elasticity), thereby improving the fit of the diaper 1. Since the region from the other end of the front waistline 30 to the center line AC is a region where the locking portion 41 of the locking member 40 is locked, an elastic member such as the rubber thread 33 is disposed in this region. There is a possibility that the locking is easily released by the expansion and contraction of the elastic member. In order to alleviate this problem, the region from the other end to the center line AC, that is, the region where the locking portion 41 is locked does not have an elastic region. At this time, the target region 34 is disposed in a portion of the front waistline portion 30 where no elastic region is provided.

  Further, in the present embodiment, in the horizontal direction, the distance L5 between the one end and the center line AC of the upper end in the vertical direction of the front waistline 30 is the other side of the vertical upper end of the front waistline 30. Before the rear waistline portion 20 is overlapped in the front-rear direction when it is locked to the front waistline portion 30 by the locking portion 41 on the other side. The region of the waistline portion 30 can be further reduced. Thereby, the discomfort and uncomfortable feeling which arise when the rear waistline part 20 and the front waistline part 30 are piled up during wear can be reduced.

  Furthermore, in the present embodiment, in the lateral direction, the distance d from the center line RC of the rear waistline portion 20 to the center line AC of the absorbent main body 10 is set to the distance between the other end Xe2 of the elastic region X and the center line AC. By making the distance L4 smaller than the difference between the distance L3 between the end Xe1 on one side of the elastic region X and the center line AC (d <L4-L3), the locking portion 41 is locked to the front waistline portion 30. In this case, the possibility that the center of the absorbent main body 10 in the lateral direction (center line AC) and the approximate center of the human body (center line BC) are shifted can be further reduced. In the present embodiment, the center line BC indicating the approximate center position of the human body and the center line RC indicating the lateral center of the rear waistline portion 20 are set at the same position, but the present invention is not limited to this. The position of the center line BC can be adjusted as appropriate depending on the size of the human body, the dimensions of each member, the elastic force of the elastic member, and the position of the center line BC is provided at a position different from the center line RC. Also good.

  As described above, in the diaper 1, in the region where the rear waistline portion 20 and the locking member 40 overlap in the front waistline portion 30, the elastic force of the thread rubber 33 is not exhibited. 33 has the same stretching force, a center line BC indicating the approximate center of the human body and a center line RC indicating the lateral center of the rear waistline portion 20 are provided at the same position, and the distance d When the double length and the difference between the distance L4 and the distance L3 are the same (2d = L4-L3), it is the most ideal that the waistline opening 1HB formed by the rubber threads 23 and 33 can be appropriately fitted. The positional relationship can be different.

  The diaper 1 does not have the thread rubber 33 because the other side of the front waistline portion 30 from the center line AC is locked by the locking portion 41. Moreover, even if it has the thread rubber 33 in this area | region, the elasticity will fall by the latching of the latching | locking part 41, and the elasticity of the other side will become weaker compared with one side during wear. There is a fear. Therefore, in the elastic region X, which is the region where the plurality of thread rubbers 33 are disposed in the rear waistline portion 20, the number of the rubber threads 33 in the elastic region X provided between the one end Xe1 and the center line AC. It is desirable to provide a larger number of thread rubbers 33 in the elastic region X provided between the other end Xe2 and the center line AC. Thereby, the fitting property of the diaper 1 can be improved.

  Furthermore, in the present embodiment, the rear waistline portion 20 has a locking member 40 having a locking portion 41, and the locking member 40 is a second joining region 40 j of the rear waistline portion 20, and It is fixed to the other end portion of the waistline portion 20, and the length H2 of the second joining region 40j in the vertical direction is equal to or more than half the length H1 of the lateral end 20er on the other side of the rear waistline portion 20. By doing so (H2> H1 / 2), when the locking member 40 is pulled and locked to the front waistline portion 30 from the state shown in FIG. 5A, the force that pulled the locking member 40 is applied to the waistline portion 20. It can be applied to more than half of the lateral end 20er on the other side. Accordingly, a uniform force can be applied to the front waistline portion 30, and the risk of damage or deformation of the front waistline portion 30 due to an excessive force being applied to a part of the front waistline portion 30 can be reduced.

  Further, the rear waistline portion 20, the front waistline portion 30, and the absorbent main body 10 are separate bodies, each of which has an inclined portion 20 bl on one side in the lateral direction of the lower end portion of the rear waistline portion 20, and the back waistline portion 20. There is an inclined portion 20br on the other side in the lateral direction of the lower end portion, and the lateral length L2 of the inclined portion 20br may be longer than the lateral length L1 of the inclined portion 20bl (L2>). L1). The lateral length L1 of the inclined portion 20bl on one side is set to a length corresponding to the size of the wearer's leg, and the leg opening 1HL on the one side is fitted to the wearer's leg. . The other-side inclined portion 20br has a lateral length L2 of the other-side inclined portion 20br longer than the lateral length L1 of the one-side inclined portion 20bl, and is locked by the locking portion 41 when worn. May adjust the size of the leg opening 1HB on the other side.

  Further, in the present embodiment, the rear waistline portion 20, the front waistline portion 30, and the absorbent main body 10 are separate bodies, and are superimposed on the rear waistline portion 20 on the rear side in the front-rear direction of the absorbent main body 10. One end portion 10a is provided, and the other end portion 10b superimposed on the front waistline portion 30 is provided on the front side in the front-rear direction of the absorbent main body 10, and the other end portion 10b extends from the lower end of the one end portion 10a. The length H1 of the lateral end 20er on the other side of the rear waistline portion 20 is smaller than half of the length H3 of the absorbent main body 10 to the lower end (H3 / 2> H1). The length H3 of the absorbent main body 10 from the lower end of the one end portion 10a to the lower end of the other end portion 10b can be made relatively long, and each leg opening 1HL can be provided with a length corresponding to the size of the leg. In addition, by shortening the length of the other end 20e of the rear waistline portion 20, it becomes easier to transmit the force that pulled the locking member 40 to the rear waistline portion 20 during locking, so it is more worn It becomes easy to let you.

  Further, in the present embodiment, in the lateral direction, the elastic region X at the upper end of the rear waistline portion 20 is continuously provided at least from one end to the other end of the absorbent main body 10, so that the locking portion When 41 is locked to the front waistline portion 30, it is possible to reduce the possibility that the center of the absorbent main body 10 in the lateral direction (center line AC) and the center of the wearer's crotch (center line BC) will shift. .

(Regarding the positional deviation of the overlap between the front waistline portion 30 and the back waistline portion 20)
Next, the positional shift of the overlapping portion between the end portion 300 on the other side in the lateral direction of the front waistline portion 30 and the end portion 200 on the other side in the lateral direction of the rear waistline portion 20 will be described with reference to FIG.

  FIG. 6 is an explanatory diagram showing a state when a diaper according to a comparative example is worn.

  In the diaper shown in FIG. 6, in the state where the front waistline portion 30 and the back waistline portion 20 are extended in the lateral direction, the other side from the center position (center line AC) of the absorbent body 10 in the lateral direction of the front waistline portion 30. The distance L6 to the lateral end 30er on the side is a distance L8 (see FIG. 2) from the center position (center line AC) of the absorbent main body 10 to the lateral end 20er on the other side in the lateral direction of the rear waistline portion 20. Or longer than the distance L8 (L6 ≧ L8). In this case, when the diaper is worn, a region of an overlapping portion between the end 300 on the other side in the lateral direction of the front waistline 30 and the other side in the lateral direction of the rear waistline 20 becomes large.

  In the single-open pants-type diaper, on the other side (open side) in the lateral direction, the locking portion 41 is only locked to the target region 34 of the front waistline portion 30. The portion on the other side in the lateral direction from the stop portion (the portion overlapping the lateral end of the rear waistline portion 20) is not fixed to the rear waistline portion 20. For example, when a sleeping baby (wearer) flutters his / her legs, the rear waistline follows the movement of the baby's legs on the other side in the lateral direction of the front waistline 30 located on the skin side. A portion overlapping the end portion 200 on the other side in the horizontal direction of the portion 20 (region including the end portion 300) is liable to cause a positional shift in the vertical direction (see FIG. 6). In addition, when the sleeping baby moves in the horizontal direction by turning over or the like, the end 300 on the other side in the horizontal direction of the front waistline portion 30 is easily rounded toward the one side in the horizontal direction. Further, the larger the region of the portion overlapping the other end of the rear waistline portion 20 in the lateral direction on the other side in the lateral direction of the front waistline portion 30 is, the easier it is to cause the above-described misalignment in the overlapping portion. In addition, the deviation width when the positional deviation occurs is increased. In addition, in FIG. 6, the state (position) of the front waistline part 30 before causing a position shift is shown with the dashed-two dotted line.

  However, in the diaper 1, as described above, in the state where the front waistline portion 30 and the rear waistline portion 20 are extended in the lateral direction, the position of the center of the absorbent main body 10 in the lateral direction of the front waistline portion 30 (center line AC ) To the other lateral end 30er is shorter than the distance L8 from the center position (center line AC) of the absorbent main body 10 to the other lateral end 20er in the lateral direction of the rear waistline portion 20. Since (L6 <L8) (see FIG. 2), when the diaper 1 is worn, the region of the overlapping portion between the other end 300 in the lateral direction of the front waistline 30 and the other lateral side of the rear waistline 20 is Get smaller. Thereby, it is possible to make it difficult to cause the above-described positional shift. Further, even if a positional deviation occurs, the deviation width can be reduced. For this reason, fitting property can be made favorable when the diaper 1 is worn.

  Next, FIGS. 5 to 9 show the locking position of the locking portion 41, the position of the elastic region X in the locked state (wearing state), and the position of the second joint 2b in the locked state (wearing state). The description will be given with reference.

(Locking position of the locking part 41)
First, the locking position of the locking part 41 will be described.

  7A and 7B, when the diaper 1 is put on the wearer, the locking portion 41 is in front so that the lateral center 41C of the locking portion 41 is positioned at the lateral center 34C of the target region 34. Locked to the waistline 30.

  FIG. 8 shows a state in which the locking portion 41 is locked so that the waistline opening 1HB is narrower than in the case shown in FIGS. 7A and 7B. Since the target area 34 is also provided in an area on one side of the center line AC, the locking portion 41 can be locked at a position shifted to one side of the center line AC. As a result, the overlapping portion of the rear waistline portion 20 and the front waistline portion 30 becomes large, and the waistline opening 1HB can be made smaller accordingly, so that it is possible for a wearer (such as an infant) with a small waistline size. A good fit can be given.

  7 to 9, the entire area of the locking portion 41 is positioned so as to overlap the target area 34. However, when the locking is performed, the entire area of the locking portion 41 is not necessarily the same as the target area 34. It is not necessary to overlap, and it is sufficient that at least some areas overlap each other. However, it is desirable that the entire region of the locking portion 41 overlaps the target region 34 because the larger the area of the overlapping portion of the locking portion 41 and the target region 34, the stronger the engagement between the both.

  9A and 9B show a state in which the locking portion 41 is locked so that the waistline opening 1HB is widened, contrary to FIG. 9A and 9B, in the lateral direction, the end 41er on the second joint portion 2b side of the locking portion 41 is on the other side in the lateral direction of the absorbent main body 10 (the side opposite to the first joint portion 1b side). The locking portion 41 is locked to the front waistline portion 30 so as to be positioned at the lateral end 10er. Thereby, since the overlap part of the back waistline part 20 and the front waistline part 30 becomes small, and it becomes possible to form the waistline opening part 1HB large by that much, a wearer (infant etc.) with a large waistline size can be used. A good fit can be given.

  However, with the locking position shown in FIG. 9A and FIG. 9B as a reference locking position, the end 41er on the second joint 2b side of the locking part 41 is in the locking position or in a lateral direction from the locking position. It is desirable that the locking portion 41 is locked to the front waistline portion 30 so as to be located inside. For example, consider a case where the locking portion 41 is locked to the front waistline portion 30 in a state where the locking portion 41 protrudes from the lower end of the front waistline portion 30. If the end 512 on the second joint portion 2b side of the locking portion 41 is positioned on the outer side in the lateral direction with respect to the lateral end 10er on the other side of the absorbent main body 10, the locking portion 41 having rigidity is provided. The protruding portion may touch the wearer's leg and damage the wearer's skin. On the other hand, when the end 41er on the second joint portion 2b side of the locking portion 41 is located on the inner side in the lateral direction with respect to the reference locking position or the reference locking position, the locking portion 41 is provided. Since the protruding portion overlaps the absorbent main body 10, it can be avoided that the protruding portion touches the wearer's leg.

  As shown in FIGS. 8, 9A, and 9B, the engaging portion 41 is engaged with the front waistline portion 30 so that the lateral center 41C of the engaging portion 41 is positioned at the lateral center 34C of the target region 34. It is not always necessary to stop.

(Position of elastic region X in the locked state)
Next, the position of the elastic region X in a state where the locking portion 41 is locked to the front waistline portion 30 (a wearing state of the diaper 1) will be described.

  As shown in FIGS. 9A and 9B, in the state where the locking portion 41 is locked at the reference locking position, the elastic region X is the end 300 on the other side in the lateral direction of the front waistline portion 30 in the lateral direction. And has an overlapping portion (indicated by a thick broken line in FIG. 9B) with the end portion 300 on the other side in the lateral direction of the front waistline portion 30. Even when the locking portion 41 is locked inward in the lateral direction from the reference locking position (see FIGS. 7A, 7B, and 8), the elastic region X is the front waistline portion 30 in the lateral direction. It is located on the non-skin side of the other end portion 300 in the lateral direction and has an overlapping portion (shown by a thick broken line in FIG. 7B) with the other end portion 300 in the lateral direction of the front waistline portion 30. Yes.

  As shown in FIG. 6, when the other end portion 200 in the lateral direction of the rear waistline portion 20 does not have the elastic region X, as described above, the baby as the wearer flaps his / her leg. When laying or turning over, the other end portion 300 in the lateral direction of the front waistline portion 30 and the other end portion 200 in the lateral direction of the rear waistline portion 20 slide on each other, resulting in a positional shift in the overlapping portion. Is likely to occur. However, in the diaper 1, the end portion 300 on the other side in the lateral direction of the front waistline portion 30 is pressed against the wearer's skin by the elastic force of the elastic region X, so the overlapping portion of the front waistline portion 30 and the back waistline portion 20 The position shift in can be suppressed and the fit at the time of wearing of the diaper 1 can be made favorable.

  In the present embodiment, the other end 300 in the lateral direction of the front waistline portion 30 does not have stretchability (does not have the elastic region Y), so that the elastic force of the elastic region X acts. When this is done, the end 300 on the other side in the lateral direction of the front waistline 30 is pressed flat against the wearer's skin, so that an uncomfortable feeling on the skin is suppressed and the touch is improved.

  In the present embodiment, the longitudinal length H5 of the elastic region X is longer than the longitudinal length H4 of the end portion 200 on the other side in the lateral direction of the front waistline portion 30 (H5> H4). In the longitudinal direction, the end portion 200 on the other side in the lateral direction of the front waistline portion 30 can be covered with the elastic region X, and the entire longitudinal region of the end portion 200 on the other side in the lateral direction of the front waistline portion 30 is elastic. The force acts, and it is possible to further suppress the positional deviation in the overlapping portion between the front waistline portion 30 and the rear waistline portion 20.

  In the present embodiment, the locking portion 41 is locked at the reference locking position (see FIG. 9A) and is locked at a position inside the lateral direction from the reference locking position. In FIG. 7A and FIG. 8, the elastic region X includes a portion located on the front side of the first joint portion 1 b, including a portion overlapping the other end portion 300 in the lateral direction of the front waistline portion 30. ing. Thereby, also in the open side of the diaper 1, the elastic force by the elastic area | region X acts and it can improve fitting property.

(Position of the second joint 2b in the locked state)
Next, the position of the 2nd junction part 2b in the state (Wearing state of the diaper 1) in which the latching | locking part 41 is latched by the front waistline part 30 is demonstrated.

  In a state where the locking portion 41 is locked at the reference locking position (see FIG. 9A) and a state where the locking portion 41 is locked at a position laterally inside the reference locking position (see FIGS. 7A and 8), The 2nd junction part 2b is located in the front side rather than the position of the 1st junction part 1b (refer to Drawing 7B and Drawing 9B).

  As shown in FIG. 5B, a baby who is a wearer often has a stomach protruding forward, and the front waistline portion 30 receives a downward force due to the protrusion of the wearer's stomach (FIG. 5B and FIG. 5B). (See arrow shown in 5C). Since the front waistline part and the rear waistline part are joined together and the joint part having rigidity is often located on both sides of the wearer at the time of wearing, the front waistline part is formed of a soft nonwoven fabric or the like. It is easy to slide down and easily shift.

  However, in the diaper 1, as described above, the second joint portion 2b having rigidity is located on the front side (abdominal side) of the first joint portion 1b located on the wearer's right flank. The bulge of the wearer's stomach can be supported by 1b (see FIG. 5C). Thereby, the position shift to the downward direction of the front waistline part 30 by the protrusion of a wearer's stomach is suppressed, and the wearing property of the diaper 1 becomes favorable.

  In this embodiment, the 2nd junction part 2b is provided along the vertical direction in the edge part 200 of the other side of the horizontal direction of the back waistline part 20, and is provided in the vertical direction rather than the case where it is provided partially. Since it is provided for a long time, it functions as a “support bar” that supports the protrusion of the wearer's stomach, and further suppresses the downward displacement of the front waistline portion 2 due to the protrusion of the wearer's stomach. it can.

  In the present embodiment, the number of the overlapping members (4) in the second joint portion 2b is larger than the number of the overlapping members (2) in the front waistline portion 30 (see FIGS. 3A and 3C). ). Thus, by making the rigidity in the 2nd junction part 2b larger than the rigidity in the front waistline part 30, it becomes possible to support the protrusion of a wearer's stomach more reliably by the 2nd junction part 2b. Here, as a rigidity value of the 2nd junction part 2b and the front waistline part 30, the value which divided the value measured by the Gurley bending resistance by the length of a sample piece can be illustrated, for example. The Gurley bending resistance can be measured according to JIS-L1096 using a No. 311 Gurley-type flexibility tester manufactured by Yasuda Seiki Seisakusho.

  Note that the rigidity of the second joint portion 2b does not necessarily need to be greater than the rigidity of the front waistline portion 30 by increasing the number of members of the second joint portion 2b than the number of members of the front waistline portion 30. However, the rigidity can be increased without taking a method such as changing to a thick member.

  Further, in the present embodiment, the distance L6 from the center position (center line AC) of the absorbent main body 10 in the lateral direction of the front waistline portion 30 to the lateral end 30er on the other side is the lateral direction of the locking member 40. Since the length is longer than the length L9 (L6> L9) (see FIG. 2), the lateral end of the locking member 40 (the end opposite to the second joint portion 2b) is positioned at the center line AC. When the locking portion 41 is locked to the front waistline portion 30, the second joint portion 2 b overlaps with the end portion 300 on the other side in the lateral direction of the front waistline portion 30, so that the highly rigid second joint portion 2 b is worn. The touch can be improved without directly touching the person's skin.

  Further, in the present embodiment, as shown in FIGS. 7A and 7B, the locking portion 41 is positioned around the front waist so that the lateral center 41C of the locking portion 41 is positioned at the lateral center 34C of the target region 34. In the state of being locked to the portion 30, the second joint portion 2b is positioned on the inner side of the lateral end 10er on the other side in the lateral direction of the absorbent main body 10, and is not positioned around the wearer's leg, and therefore has rigidity. 2 It becomes difficult for the joint part 2b to touch a wearer's leg (skin) directly, and the touch becomes favorable when the diaper 1 is worn.

=== Others ===
The above-described embodiments are for facilitating the understanding of the present invention, and are not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and it is needless to say that the present invention includes equivalents thereof.

  Although various aspects have been described in the above embodiment, at least in the lateral direction, the end 41er on the second joint portion 2b side (elastic region X side) of the locking portion 41 is in the lateral direction of the absorbent main body 10. In a state where the locking portion 41 is locked to the front waistline portion 30 so as to be positioned at the other side lateral end 10er, the elastic region X is the non-skin of the other end portion 300 of the front waistline portion 30 in the lateral direction. It suffices if it is located on the side and has an overlapping portion with the end portion 300 on the other side of the front waistline portion 30. Accordingly, the elastic region X in the portion other than the overlapping portion may be provided only at the upper end portion of the rear waistline portion 20, for example.

  In the above-described embodiment, the target region 34 is located at the front waistline portion 30 from the lateral center position (center line AC) of the absorbent body 10 to the lateral end 10er on the other side of the absorbent body 10 in the lateral direction. However, the present invention is not limited to this, and the allowable range of the locking position of the locking portion 41 (the range inside the position of the lateral end 10er on the other side of the absorbent main body 10) is set. There is no particular limitation on the size of the target region 34 as long as it is provided so as to satisfy.

  In the above-described embodiment, the elastic regions X and Y are formed by the plurality of thread rubbers 23 and 33 that can be expanded and contracted in the lateral direction. However, the present invention is not limited thereto, and for example, the front waistline portion 30 and the rear waistline portion 20 are formed. The elastic regions X and Y may be formed of a stretchable nonwoven fabric that can be stretched in the lateral direction.

  In said embodiment, although what was called a 3 piece type disposable diaper 1 was illustrated as an example of an absorbent article, it is not restricted to this at all. For example, a two-piece type disposable diaper having an exterior sheet in which a rear waistline part and a front waistline part are integrated through a crotch as a first part and an absorbent main body fixed to the skin side surface of the exterior sheet as a second part. There may be.

  In the above embodiment, an example has been described in which the target region 34 has a loop, the locking portion 41 has a hook, and the hook 41 is locked to the target region 34 by hooking the hook into the loop. However, the configurations of the target region 34 and the locking portion 41 are not limited to the above-described examples. For example, an adhesive member is provided on at least one surface of the target region 34 and the locking portion 41, and both are locked by sticking the adhesive member to the other surface. May be.

  In the above embodiment, the state in which the locking member 40 protrudes laterally from the rear waistline portion 20 when worn is described, but the locking member 40 is folded in a state in which the disposable diaper 1 is manufactured. Alternatively, the locking member 40 may be temporarily connected to the front waistline portion 30 by a perforation or the like.

  In said embodiment, although it was decided that the area | region which overlaps with the absorber 11 about the back waistline part 20 and the front waistline part 30 did not provide the rubber threads 23 and 33, it is not restricted to this. You may provide the thread rubbers 23 and 33 in the area | region which overlaps with the absorber 11. FIG. By not providing the thread rubbers 23 and 33 in the region overlapping with the absorbent body 11, the possibility that the absorbent body 11 is deformed by the expansion and contraction of the thread rubbers 23 and 33 can be reduced. On the other hand, by providing the thread rubbers 23 and 33 in the region overlapping with the absorbent body 11, the absorbent main body 10 can be fitted more by the stretching force.

  In the above embodiment, the lateral positions of the center lines RC and BC are shifted by the distance d to the right side (the other side) in the lateral direction from the lateral position of the center line AC. The horizontal position of BC and the horizontal position of the center line AC may be the same. That is, the absorbent main body 10 is positioned between the front waistline portion 30 and the rear waistline portion 20 so that the position of the center of the rear waistline portion 20 in the horizontal direction is the same as the position of the center of the absorbent body 10 in the horizontal direction. It may be bridged.

1 ... Diaper (absorbent article)
1b ... 1st junction part 2b ... 2nd junction part 10 ... Absorbent body (crotch part)
20 ... Rear waistline portion 30 ... Front waistline portion 34 ... Target region 40 ... Locking member 41 ... Locking portion 200, 300 ... End X, Y on the other side ... Elastic region

Claims (6)

A longitudinal direction, a transverse direction intersecting the longitudinal direction, and a longitudinal direction intersecting the longitudinal direction and the transverse direction,
A front waistline portion along the lateral direction;
A rear waistline portion along the lateral direction;
A crotch portion provided between the front waistline portion and the rear waistline portion;
An absorbent article comprising:
An end portion on one side of the rear waistline portion in the lateral direction and an end portion on one side of the front waistline portion in the lateral direction are joined by a first joint portion,
A locking member having a locking portion that can be locked to the front waistline portion when worn is provided at the other end of the rear waistline portion in the lateral direction so as to protrude in the lateral direction.
The other end portion of the rear waistline portion in the lateral direction and the locking member are joined by a second joint portion,
The one side of the front waistline portion has elasticity, and the other side of the front waistline portion does not have elasticity,
In the lateral direction, the front waistline portion is arranged such that an end of the locking portion on the side of the second joint portion is located at an end of the crotch portion on the side opposite to the first joint portion. In the state where the locking part is locked,
The said 2nd junction part is located in the front side rather than the position of the said 1st junction part, The absorbent article characterized by the above-mentioned. The absorbent article according to claim 1,
The said 2nd junction part is provided along the said vertical direction in the edge part of the said other side of the said back waist part, The absorbent article characterized by the above-mentioned. The absorbent article according to claim 1 or 2,
The absorptive article, wherein rigidity in the 2nd joined part is larger than rigidity in the front waist part. The absorbent article according to claim 3,
The absorbent article, wherein the number of members overlapping in the second joint portion is greater than the number of members overlapping in the front waistline portion. The absorbent article according to any one of claims 1 to 4,
The rear waistline portion has an elastic region that expands and contracts in the lateral direction at the other end.
In the lateral direction, the front waistline portion is arranged such that an end of the locking portion on the side of the second joint portion is located at an end of the crotch portion on the side opposite to the first joint portion. In the state where the locking part is locked,
The said elastic area | region has a part located in the front side rather than the position of a said 1st junction part, Absorbent article characterized by the above-mentioned. An absorbent article according to any one of claims 1 to 5,
The front waistline portion is for locking the locking portion between a center of the crotch portion in the lateral direction and an end opposite to the first joint portion in the lateral direction of the crotch portion. Having a target area,
In the state where the locking portion is locked to the front waistline portion so that the horizontal center of the locking portion is located at the horizontal center of the target region,
The said 2nd junction part is located in the inner side rather than the edge of the said crotch part on the opposite side to the said 1st junction part in the said horizontal direction.

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