CN113194899A

CN113194899A - Pant-shaped absorbent article and method of attaching absorbent pad

Info

Publication number: CN113194899A
Application number: CN201980083095.9A
Authority: CN
Inventors: 永井贵仁; 田中杰
Original assignee: Unicharm Corp
Current assignee: Unicharm Corp
Priority date: 2018-12-25
Filing date: 2019-12-24
Publication date: 2021-07-30
Anticipated expiration: 2039-12-24
Also published as: CN113194899B; JP6757396B2; TW202031217A; JP2020099590A; BR112021009576B1; BR112021009576A2; WO2020138058A1; TWI801687B

Abstract

A pants-shaped absorbent article (1) is provided which includes a pair of leakage-preventing wall portions (40) and to which an absorbent pad (100) can be adhered, wherein the leakage-preventing wall portions (40) have a first joint portion (61) connecting opposite surfaces of a skin-side portion (42) and a non-skin-side portion (43) and a pair of second joint portions (62) connecting the non-skin-side portion (43) to an absorbent body (10). When the absorbent pad (100) is adhered to the pant-shaped absorbent article (1) such that the pant-shaped absorbent article (1) and the absorbent pad (100) are aligned centrally in the width direction, a width-direction space (W61) between the inner ends of the first engaging portions (61) has a portion shorter than the width-direction length (W100) of the absorbent pad (100), and a width-direction space (W62) between the inner ends of the second engaging portions (62) has a portion less than or equal to the width-direction length (W100) of the absorbent pad (100).

Description

Pant-shaped absorbent article and method of attaching absorbent pad

Technical Field

The present invention relates to a pant-shaped absorbent article and a method of attaching an absorbent pad.

Background

As a pants-shaped absorbent article, a pants-shaped disposable diaper is known.

For example, patent document 1 discloses a pants-shaped disposable diaper including a main body having an absorbent core and leakage preventing cuffs (leakage preventing walls) extending in a longitudinal direction on the main body and arranged laterally at intervals.

[ list of references ]

[ patent document ]

Patent document 1: japanese patent application laid-open No. 2005-promotion 218876

Disclosure of Invention

[ problem ] to

In recent years, a method of using a pants-shaped disposable diaper has been proposed as follows: a disposable absorbent pad is attached to the inner side of the pants-shaped disposable diaper described in patent document 1, and the absorbent pad is replaced only after the absorption of excrement, thereby reducing the replacement frequency of the pants-shaped disposable diaper. Bringing the pant diaper and the absorbent pad together as described above enables the user (wearer) to reduce the work of changing the diaper or the economic burden. However, in the conventional method, the position of the absorbent pad may shift in the case where the wearer moves his/her body or the like. This causes a problem that excrement leaks from the absorbent pad or fit is deteriorated.

The present invention has been made in view of the above conventional problems, and an aspect of the present invention is to suppress positional deviation of an absorbent pad when a pant-shaped absorbent article is used together with the absorbent pad.

[ solution of problem ]

A main aspect of the present invention for achieving the above-described aspect is a pant-shaped absorbent article having a longitudinal direction, a width direction, and a thickness direction intersecting each other in a developed state, the pant-shaped absorbent article having an absorbent pad attached to a skin side in the thickness direction with respect to an absorbent main body, the pant-shaped absorbent article comprising: an absorption body; a pair of leakage preventing wall portions provided on both sides in a width direction of the absorbent main body, the leakage preventing wall portions being capable of rising toward a skin side in a thickness direction, the pair of leakage preventing wall portions each having a skin-side portion and a non-skin-side portion, the non-skin-side portion being arranged on the non-skin side in the thickness direction with respect to the skin-side portion; a pair of first engaging portions each engaging at least a part of opposing surfaces of the skin-side portion and the non-skin-side portion, the opposing surfaces being constituted by surfaces of the skin-side portion and the non-skin-side portion facing each other; and a pair of second engaging portions each engaging at least a part of the non-skin side portion to the skin side of the absorbent body, in a state where the pant-shaped absorbent article and the absorbent pad are stretched in the longitudinal direction and the width direction, when the absorbent pad is attached to the pant-shaped absorbent article such that the widthwise center of the pant-shaped absorbent article and the widthwise center of the absorbent pad are aligned with each other, in a longitudinal region in which the pair of first engaging portions are arranged, there is a portion in which a widthwise space between inner ends of the pair of first engaging portions is shorter than a widthwise length of the absorbent pad, in the longitudinal region in which the pair of second engaging portions are arranged, there is a portion in which a widthwise space between inner ends of the pair of second engaging portions is shorter than or equal to a widthwise length of the absorbent pad.

Other features of the present invention will be further clarified by the description of the present specification and the accompanying drawings.

[ advantageous effects of the invention ]

According to the present invention, when the pant-shaped absorbent article is used together with the absorbent pad, it is possible to make the positional deviation of the absorbent pad less likely to occur.

Drawings

Fig. 1 is a front view of a pants-shaped disposable diaper 1.

Fig. 2 is a schematic plan view of the diaper 1 in an unfolded and stretched state.

Fig. 3A is a schematic cross-sectional view taken along line a-a in fig. 2.

Fig. 3B is a schematic cross-sectional view taken along line B-B in fig. 2.

Fig. 3C is a schematic cross-sectional view taken along line C-C in fig. 2.

Fig. 4 is a schematic plan view and a schematic cross-sectional view of the absorbent pad 100.

Fig. 5 is a schematic plan view showing a state where the absorbent pad 100 is adhered to the diaper 1 in an unfolded and stretched state.

Fig. 6A is a schematic cross-sectional view taken along line D-D in fig. 5.

Fig. 6B is a schematic cross-sectional view taken along line E-E in fig. 5.

Detailed Description

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

A pant-shaped absorbent article having a longitudinal direction, a width direction, and a thickness direction which intersect with each other in a developed state, the pant-shaped absorbent article having an absorbent pad attached to a skin side in the thickness direction with respect to an absorbent main body, the pant-shaped absorbent article comprising: an absorption body; a pair of leakage preventing wall portions provided on both sides in a width direction of the absorbent main body, the leakage preventing wall portions being capable of rising toward a skin side in a thickness direction, the pair of leakage preventing wall portions each having a skin-side portion and a non-skin-side portion, the non-skin-side portion being arranged on the non-skin side in the thickness direction with respect to the skin-side portion; a pair of first engaging portions each engaging at least a part of opposing surfaces of the skin-side portion and the non-skin-side portion, the opposing surfaces being constituted by surfaces of the skin-side portion and the non-skin-side portion facing each other; and a pair of second engaging portions each engaging at least a part of the non-skin side portion to the skin side of the absorbent body, in a state where the pant-shaped absorbent article and the absorbent pad are stretched in the longitudinal direction and the width direction, when the absorbent pad is attached to the pant-shaped absorbent article such that the widthwise center of the pant-shaped absorbent article and the widthwise center of the absorbent pad are aligned with each other, in a longitudinal region in which the pair of first engaging portions are arranged, there is a portion in which a widthwise space between inner ends of the pair of first engaging portions is shorter than a widthwise length of the absorbent pad, in the longitudinal region in which the pair of second engaging portions are arranged, there is a portion in which a widthwise space between inner ends of the pair of second engaging portions is shorter than or equal to a widthwise length of the absorbent pad.

According to such a pants-shaped absorbent article, at least a part of the widthwise end portion of the absorbent pad can be inserted between the pair of first joint portions (leakage preventing wall portions) and the absorbent main body when the absorbent pad is adhered. Therefore, the movement of the absorbent pad in the thickness direction is restricted by the first engaging portion. Further, the widthwise outer end portions (edges) of the absorbent pad are sandwiched by the pair of second engaging portions from both sides in the width direction. Therefore, the movement of the absorbent pad in the width direction is restricted. This makes it possible to suppress occurrence of positional deviation of the absorbent pad.

In such a pant-shaped absorbent article, it is desirable that the center of the second engaging portion is located on the front side in the longitudinal direction with respect to the center of the pant-shaped absorbent article in the unfolded state.

According to such a pants-shaped absorbent article, the absorbent pad is sandwiched between the second engaging portions from both sides in the width direction in the longitudinal front region where the force of the wearer's legs is likely to act while the absorbent article is worn. In this region, this suppresses the displacement of the absorbent pad in the width direction, and the positional displacement of the absorbent pad is less likely to occur even if the wearer moves the body (legs).

In such a pant-shaped absorbent article, it is desirable that the entirety of the second engaging portion is located on the front side in the longitudinal direction with respect to the center of the pant-shaped absorbent article in the unfolded state.

According to such a pants-shaped absorbent article, it is easier to suppress the positional deviation of the absorbent pad in the front side region in the longitudinal direction. Therefore, even when the wearer walks or moves the legs over a wide range while wearing the pant-shaped absorbent article, the positional displacement of the absorbent pad can be effectively suppressed.

In such a pant-shaped absorbent article, it is desirable that the absorbent main body has an absorbent core having a contracted portion with a small widthwise length in a region between the front end portion and the rear end portion in the longitudinal direction, and the second engaging portion overlaps with the contracted portion in the longitudinal direction and is located outside in the widthwise direction with respect to the absorbent core.

According to such a pants-shaped absorbent article, since the absorbent core is provided with the contracted portion, it is difficult to hinder the movement of the legs of the wearer. Further, by adjusting the positional relationship of the contraction portion and the second engagement portion, the second engagement portion can effectively suppress the positional deviation of the absorbent pad even in the case where the wearer moves the leg over a wide range in the region where the contraction portion is provided.

In such a pants-shaped absorbent article, it is desirable that the first engaging portion is located widthwise inward with respect to the front end of the leakage preventing wall.

According to such a pants-shaped absorbent article, the first joint portion can improve the strength of the leakage preventing wall portion in the region on the inner side in the width direction with respect to the front end of the leakage preventing wall portion. Thus, the widthwise end portion of the absorbent pad can be stably pressed by the leakage preventing wall portion when the absorbent pad is adhered. This makes it easier to suppress the separation of the absorbent pad.

In such a pants-shaped absorbent article, it is desirable that the absorbent pad has a pair of adhesive portions on both sides in the longitudinal direction, and the first engaging portion is located inward in the longitudinal direction with respect to a portion at a position where the pair of adhesive portions contact the pants-shaped absorbent article when the absorbent pad is adhered to the pants-shaped absorbent article.

According to such a pants-shaped absorbent article, the absorbent pad is attached and firmly fixed to the skin side of the pants-shaped absorbent article at both longitudinal ends of the absorbent pad provided with the adhesive portions. Further, the widthwise end portions of the absorbent pad are pressed from the skin side by the first engaging portions (leakage preventing wall portions) in the region between the adhesive portions in the longitudinal direction of the absorbent pad. This makes it possible to suppress occurrence of positional deviation of the entire absorbent pad in the longitudinal direction.

In such a pants-shaped absorbent article, it is desirable that the widthwise space between the inner ends of the pair of leakage preventing wall portions be shorter than the widthwise space between the inner ends of the pair of second engaging portions.

According to such a pants-shaped absorbent article, when the absorbent pad is adhered, both widthwise ends of the absorbent pad are sandwiched in the widthwise direction by the pair of second engaging portions, so that it is possible to be covered from the skin side by the inner ends of the leakage preventing wall portions. This can make it easier to suppress the positional shift of the absorbent pad.

In such a pant-shaped absorbent article, it is desirable that the first engaging portion and the second engaging portion do not have a portion in the longitudinal direction where the first engaging portion and the second engaging portion overlap each other.

According to such a pants-shaped absorbent article, the portion in which the rising height of the leakage preventing wall portion is restricted by the first engaging portion is staggered in the longitudinal direction from the portion in which the rising height of the leakage preventing wall portion is restricted by the second engaging portion. This prevents the rising height of the leakage preventing wall portion from being significantly restricted. This can make it less likely to cause deterioration in fit of the pant-shaped absorbent article, side leakage of excrement, and the like, while suppressing positional deviation of the absorbent pad.

In such a pant-shaped absorbent article, it is desirable to provide a predetermined distance between the outer end of the second engaging portion and the outer end of the leakage preventing wall portion in the width direction.

According to such a pants-shaped absorbent article, a so-called dry edge is formed at the outer end in the width direction of the leakage preventing wall portion. Therefore, when the pant-shaped absorbent article is worn, a soft touch feeling is achieved at the outer end portions of the leakage preventing wall portions which are likely to come into direct contact with the skin (legs) of the wearer, thereby making it possible to suppress the wearer's uncomfortable feeling.

Further, there is set forth a pant-shaped absorbent article having a longitudinal direction, a width direction and a thickness direction intersecting each other in a developed state, the pant-shaped absorbent article having an absorbent pad affixed to a skin side in the thickness direction with respect to an absorbent main body, the pant-shaped absorbent article comprising: an absorption body; a pair of leakage preventing wall portions provided on both sides in a width direction of the absorbent main body, the leakage preventing wall portions being capable of rising toward a skin side in a thickness direction, the pair of leakage preventing wall portions each having a skin-side portion and a non-skin-side portion, the non-skin-side portion being arranged on the non-skin side in the thickness direction with respect to the skin-side portion; a pair of first engaging portions each engaging at least a part of opposing surfaces of the skin-side portion and the non-skin-side portion, the opposing surfaces being constituted by surfaces of the skin-side portion and the non-skin-side portion facing each other; and a pair of second engaging portions each engaging at least a part of the non-skin side portion to the skin side of the absorbent main body, when the absorbent pad is adhered to the pant-shaped absorbent article in a state where the pant-shaped absorbent article and the absorbent pad are stretched in the longitudinal direction and the width direction such that the width-direction center of the pant-shaped absorbent article and the width-direction center of the absorbent pad are aligned with each other, at least a part of each of two width-direction ends of the absorbent pad is sandwiched between the first engaging portion and the absorbent main body in the thickness direction, and two width-direction edges of the absorbent pad are in contact with the second engaging portions in the width direction.

According to such a pants-shaped absorbent article, at least a part of the widthwise end portion of the absorbent pad can be inserted between the pair of first engaging portions (leakage preventing wall portions) and the absorbent main body when the absorbent pad is adhered. Therefore, the movement of the absorbent pad in the thickness direction is restricted by the first engaging portion. Further, the widthwise outer ends (edges) of the absorbent pad are sandwiched by the pair of second engaging portions from both sides in the width direction. Therefore, the movement of the absorbent pad in the width direction is restricted. This makes it possible to suppress occurrence of positional deviation of the absorbent pad.

Further, a method of adhering an absorbent pad to a pant-shaped absorbent article having a longitudinal direction, a width direction and a thickness direction intersecting each other in a developed state on a skin side with respect to a thickness direction of an absorbent main body is set forth, the pant-shaped absorbent article comprising: an absorption body; a pair of leakage preventing wall portions provided on both sides in a width direction of the absorbent main body, the leakage preventing wall portions being capable of rising toward a skin side in a thickness direction, the pair of leakage preventing wall portions each having a skin-side portion and a non-skin-side portion, the non-skin-side portion being arranged on the non-skin side in the thickness direction with respect to the skin-side portion; a pair of first engaging portions each engaging at least a part of opposing surfaces of the skin-side portion and the non-skin-side portion, the opposing surfaces being constituted by surfaces of the skin-side portion and the non-skin-side portion facing each other; and a pair of second connecting portions each joining at least a part of the non-skin side portion to the skin side of the absorbent body, the method comprising: sandwiching at least a part of the thickness direction of each of the two width direction end portions of the absorbent pad between the first engaging portion and the absorbent body when the absorbent pad is adhered to the pant-shaped absorbent article such that the width direction center of the pant-shaped absorbent article and the width direction center of the absorbent pad are aligned with each other; and both widthwise edges of the absorbent pad are brought into contact with the second bonding portions in the widthwise direction.

According to this method of adhering the absorbent pad, at least part of the widthwise end portion of the absorbent pad can be inserted between the pair of first joint portions (leakage preventing wall portions) and the absorbent main body at the time of adhering the absorbent pad. Therefore, the movement of the absorbent pad in the thickness direction is restricted by the first engaging portion. Further, the widthwise outer ends (edges) of the absorbent pad are sandwiched by the pair of second joining portions from both sides in the width direction. Therefore, the movement of the absorbent pad in the width direction is restricted. This makes it possible to suppress occurrence of positional deviation of the absorbent pad.

Examples

Hereinafter, as an example of the pants-shaped absorbent article of the present invention, an example using a pants-shaped disposable diaper 1 for adults (hereinafter also simply referred to as "diaper 1") will be described. However, the diaper 1 according to the invention may also be used as a pants-shaped disposable diaper for infants, sanitary pants or the like.

Structure of pants-shaped disposable diaper 1

Fig. 1 is a front view of a pants-shaped disposable diaper 1 (diaper 1). Fig. 2 is a schematic plan view of the diaper 1 in an unfolded and stretched state. Fig. 3A is a schematic cross-sectional view taken along line a-a in fig. 2. Fig. 3B is a schematic cross-sectional view taken along line B-B in fig. 2. Fig. 3C is a schematic cross-sectional view taken along line C-C in fig. 2. It should be noted that the "stretched state" refers to a state in which each constituent member of the diaper 1 is stretched to eliminate wrinkles. Specifically, the stretched state refers to a state in which the diaper 1 is stretched such that the dimensions of the constituent members (e.g., the sheet member 14 described later, etc.) of the diaper 1 coincide with or are close to their own dimensions.

In the state of the pants-shaped state of fig. 1, the diaper 1 has a vertical direction, a lateral direction, and a front-rear direction which intersect each other, and has a waist opening BH and a pair of leg openings LH formed therein. The upper side in the vertical direction corresponds to the waist opening BH side, and the lower side corresponds to the crotch side. Further, the front side in the front-rear direction corresponds to the ventral side of the wearer, and the rear side corresponds to the dorsal side of the wearer. Further, in the developed state as shown in fig. 2, the diaper 1 has a longitudinal direction, a width direction, and a thickness direction which intersect each other. Hereinafter, one side in the longitudinal direction in such an expanded state is also referred to as "front side", and the other side in the longitudinal direction is also referred to as "back side". It should be noted that the width direction in the unfolded state is the same as the transverse direction in the pant-shaped state. The longitudinal direction in the unfolded state is a direction along the vertical direction in the pant-shaped state. Further, as shown in fig. 3A and 3B, the thickness direction is a direction in which materials constituting the diaper 1 overlap. In the thickness direction, a side in contact with the wearer is defined as a skin side, and a side opposite to the skin side is defined as a non-skin side.

The diaper 1 has an absorbent main body 10, a front waist portion 20 and a rear waist portion 30. In the diaper 1 in a pant-like state, an absorbent body 10 (an absorbent core 11 described later) is arranged in a vertical direction and bent in a front-rear direction at a vertical lower end portion. The front waist portion 20 is joined from the non-skin side to the front upper end portion in the front-rear direction of the absorbent main body 10. And, the rear waist portion 30 joins the rear upper end portion in the front-rear direction of the absorbent main body 10 from the non-skin side.

In the diaper 1 in the unfolded state of fig. 2, the front waist section 20 and the rear waist section 30 are arranged such that their long-side directions are along the lateral direction of the diaper 1. Further, one longitudinal side (front) end of the absorbent main body 10 is disposed in the widthwise central portion of the front waist portion 20, and the other longitudinal side (rear) end of the absorbent main body is disposed in the widthwise central portion of the rear waist portion 30. In the unfolded state of fig. 2, the absorbent main body 10 is folded once at substantially the longitudinal center, and both lateral side portions of the front waist section 20 and both lateral side portions of the rear waist section 30 are joined by welding or the like, thereby forming the diaper 1 in a pants-shaped state.

The absorption body 10 has side elastic members 41 on both lateral side portions, and the side elastic members 41 are stretched in the longitudinal direction (the vertical direction of the diaper 1). Further, the absorbent main body 10 includes a pair of leakage preventing wall portions 40 extending in the longitudinal direction on both lateral side portions.

Due to the side elastic member 41, the leakage preventing wall portion 40 can be raised toward the skin side.

Further, the absorption body 10 includes: an absorbent core 11 for absorbing excrement liquid; a liquid-permeable skin-side sheet 12 disposed on the skin side of the wearer with respect to the absorbent core 11; a liquid-impermeable, non-skin-side sheet 13 disposed on the non-skin side with respect to the absorbent core 11; and a sheet member 14. The skin-side sheet 12 is folded back toward the non-skin side at both lateral side portions to enclose the absorbent core 11. The sheet member 14 is arranged on the non-skin side with respect to the non-skin side sheet 13, and forms the leakage preventing wall portion 40 on the skin side with respect to the skin side sheet 12.

The absorbent core 11 is made by forming liquid-absorbent fibers, such as pulp fibers containing Super Absorbent Polymers (SAP), into a predetermined shape. The absorbent core 11 of the present embodiment has a substantially hourglass shape in plan view, but the shape is not limited thereto. For example, the shape of the absorbent core 11 may be a rectangular shape in plan view. Further, the absorbent core 11 may be covered by a liquid permeable core wrap sheet 15.

The front waist portion 20 and the rear waist portion 30 have inner sheets 21 and 31, outer sheets 22 and 32 arranged on the non-skin side with respect to the inner sheets 21 and 31, and waist

elastic members

23 and 33, respectively. The waist elastic members 23(33) are arranged side by side in the vertical direction between the inner sheet 21(31) and the outer sheet 22(32) and fixed in a state stretched in the transverse direction. Thus, the front and

rear waist portions

20, 30 fit around the waist of the wearer. Further, a cover sheet may be provided to cover the upper end of the absorption body 10 from the skin side.

In the unfolded and stretched state of fig. 2, the front waist portion 20 has a rectangular shape in plan view. The rear waist portion 30 has an overlapping portion 30A and an extending portion 30B. The overlapping portion 30A overlaps the front waist portion 20 in the front-rear direction, and the extending portion 30B extends downward beyond the front waist portion 20. The overlapping portion 30A has a rectangular shape in plan view, and the extending portion 30B has an inverted trapezoidal shape in plan view. The buttocks of the wearer may be covered by the extension 30B. On the other hand, the front waist portion 20 has a short length in the vertical direction compared to the rear waist portion 30, and the front waist portion 20 does not extend to the crotch side. Therefore, during walking or the like, the lifting movement of the leg lifted in the front side direction is not hindered, and the wearer can walk more easily.

Further, in the extension portion 30B of the rear waist portion 30, an extension portion elastic member 35 is provided along the lower end of the extension portion 30B. The extension elastic members 35 are fixed between the inner sheet 31 and the outer sheet 32 in a stretched state, similarly to the waist elastic members 33. The extension elastic member 35 makes the extension 30B fit to the buttocks of the wearer, and suppresses the curl of the extension 30B.

The leakage preventing wall portion 40

The pair of leakage preventing wall portions 40 are each formed integrally with the absorbent main body 10 by folding the sheet member 14 constituting the exterior of the absorbent main body 10. However, each leakage preventing wall portion 40 may be formed of a different member from the absorption body 10. The leakage preventing wall portion 40 is formed by a sheet member 14 which is folded from the widthwise outer side to the inner side at a folding line f1 shown in fig. 3 and folded back from the widthwise inner side to the outer side at a folding line f 2. Hereinafter, the portion of the leakage preventing wall portion 40 that is folded back from the width direction inner side toward the thickness direction outer side at the folding line f2 and is located on the skin side in the thickness direction will also be referred to as "skin-side portion 42". Also, a portion located on the non-skin side in the thickness direction with respect to the skin-side portion 42 will also be referred to as a "non-skin-side portion 43". Further, the widthwise outer end of the skin-side portion 42 is defined as a tip 42a of the leakage preventing wall portion 40.

As shown in fig. 3A to 3C, the leakage preventing wall portion 40 of the present embodiment has a layered structure including two layers in which the sheet member 14 is folded and overlapped in the thickness direction. Further, four side elastic members 41A (41) are provided side by side in the lateral direction between the two layers of sheet members 14 constituting the skin-side portion 42. The four side elastic members 41A are disposed near the outer ends (intermediate ends 42a) in the width direction. Further, two side elastic members 41B (41) are arranged side by side in the lateral direction between the two layers of sheets 14 constituting the non-skin side portion 43. The two side elastic members 41B are disposed near the inner ends in the width direction. However, the arrangement or number of the side

elastic members

41A and 41B is not limited thereto.

A pair of front end fixing portions 51 are fixed to the front end portions of the leakage preventing wall portion 40 in the longitudinal direction so as not to rise toward the skin side of the absorption body 10; the pair of front end fixing sections 51 are made of an adhesive material such as a hot melt adhesive. As shown in fig. 3A, the front end portion fixing portions 51 each have a skin side fixing portion 511 and a non-skin side fixing portion 512; the skin-side fixing portion 511 fixes a part of the leakage preventing wall portion 40 between the skin-side portion 42 and the non-skin-side portion 43 with an adhesive or the like, and the non-skin-side fixing portion 512 fixes a part of the leakage preventing wall portion 40 between the non-skin-side portion 43 and the skin-side sheet 12 with an adhesive or the like.

Similarly, the leakage preventing wall portion 40 has a pair of rear end fixing portions 52 fixed in the rear end portion in the longitudinal direction so as not to be raised toward the skin side of the absorption body 10; the pair of rear end fixing portions 52 is made of an adhesive material such as a hot melt adhesive. Therefore, a portion of the sheet member 14 between the front end fixing portion 51 and the rear end fixing portion 52 in the longitudinal direction becomes a portion where the leakage preventing wall portion 40 can be raised.

Further, in each of the pair of leakage preventing wall portions 40, the non-skin-side surface of the skin-side portion 42 and the skin-side surface of the non-skin-side portion 43 face each other, and the opposite surfaces are joined to each other in a partial area by a corresponding one of the pair of first joining portions 61. Each of the first engaging portions 61 is formed by applying an adhesive material such as a hot melt adhesive in the longitudinal direction at the widthwise inner end portion of the leakage preventing wall portion 40 (see fig. 2 and 3B). The first engaging portion 61 engages the opposite surfaces of the skin-side portion 42 and the non-skin-side portion 43, and therefore the skin-side portion 42 of the leakage preventing wall portion 40 is likely to maintain a flat surface (curved surface) shape and fit the wearer's body in surface-to-surface contact when the diaper 1 is put on.

Further, in each of the pair of leakage preventing wall portions 40, a partial area of the non-skin-side surface of the non-skin-side portion 43 is joined to the skin side (skin-side sheet 12) of the absorbent main body 10 by a corresponding one of the pair of second joining portions 62. As shown in fig. 2, each of the second bonding portions 62 is formed by applying an adhesive material (such as a hot melt adhesive) in an area between the two

first bonding portions

61 and 61; the two first engaging

portions

61 and 61 are arranged on the front side and the rear side in the longitudinal direction, respectively (see fig. 2 and 3C). In the region where the second joint portion 62 is provided, the height at which the leakage preventing wall portion 40 can rise toward the skin side when the diaper 1 is put on is limited as compared with the region where the second joint portion 62 is not provided. Therefore, in the region where the second engaging portion 62 is provided, the distance between the wearer's body and the absorption body 10 becomes short, so that it becomes easier to maintain the fitting of the absorption body 10 to the wearer's body.

Absorbent pad 100

Subsequently, an absorbent pad 100 that can be used with the diaper 1 will be described. The absorbent pad 100 has a function of absorbing excrement such as urine, and may be detachably adhered to the skin side of the absorbent main body 10 of the diaper 1.

Fig. 4 is a schematic plan view of the absorbent pad 100 and a schematic diagram showing a cross section thereof. As shown in fig. 4, the absorbent pad 100 is an absorbent article having a substantially rectangular shape in plan view, with its long side direction defined as the longitudinal direction and the short side direction defined as the width direction. The longitudinal direction and the width direction of the absorbent pad 100 are the same as those of the diaper 1 in fig. 2. Further, the absorbent pad 100 has a thickness direction orthogonal to the longitudinal direction and the width direction. However, the shape of the absorbent pad 100 is not limited to a rectangular shape. The widthwise length (width) of the absorbent pad 100 may be different at a predetermined position in the longitudinal direction.

The absorbent pad 100 has substantially the same configuration as the absorbent main body 10 of the diaper 1, except that the absorbent pad 100 does not have a portion corresponding to the leakage preventing wall portion 40. In fig. 4, the absorbent pad 100 includes: a liquid-absorbing absorbent body 111 that absorbs excretory fluid; a skin-side liquid-permeable skin-side sheet 112 arranged in the thickness direction with respect to the absorber 111; a liquid-impermeable non-skin side sheet 113 disposed on the non-skin side in the thickness direction with respect to the absorbent body 111; and a sheet member 114. The absorbent body 111, the skin-side sheet 112, the non-skin-side sheet 113, and the sheet member 114 have substantially the same configurations as the absorbent core 11, the skin-side sheet 12, the non-skin-side sheet 13, and the sheet member 14 of the absorbent main body 10, respectively, and therefore, the description thereof will be omitted. It should be noted that, although not shown in fig. 4, the following configuration is acceptable: the leakage preventing wall portions corresponding to the leakage preventing wall portions 40 of the diaper 1 are provided in the absorbent pad 100 by a sheet 114 or other member.

Further, on the non-skin-side surface in the thickness direction of the absorbent pad 100, adhesive portions 115 are provided at both longitudinal ends. The adhesive portion 115 is an area to which an adhesive material such as a hot melt adhesive is applied. When the absorbent pad 100 is used in a state of being adhered to the diaper 1, adhering the adhesive portion 115 to the skin-side surface of the diaper 1 suppresses positional deviation of the absorbent pad 100 with respect to the diaper 1. It should be noted that, in a case where the absorbent pad 100 is not yet used, the adhesive portion 115 is desirably covered with a protective sheet (not shown) from the non-skin side, thereby preventing the adhesive property of the adhesive portion 115 from disappearing.

Method for adhering absorbent pad 100

Fig. 5 is a schematic plan view showing a state where the absorbent pad 100 is adhered to the diaper 1 in a developed stretched state. Fig. 6A is a schematic cross-sectional view taken along line D-D in fig. 5. Fig. 6B is a schematic cross-sectional view taken along line E-E in fig. 5. It should be noted that fig. 5 shows a state in which the absorbent pad 100 is adhered to the diaper 1 such that the widthwise center of the diaper 1 and the widthwise center of the absorbent pad 100 are aligned with each other.

When the absorbent pad 100 is adhered to the diaper 1, first, the absorbent pad 100 is disposed on the skin side of the absorbent main body 10 of the diaper 1 such that the widthwise central positions of the absorbent pad 100 and the diaper 1 are aligned with each other. Further, the adhesive portions 115 provided at both end portions in the longitudinal direction are adhered to the skin side of the diaper 1 (the absorption body 10) and fixed so that the position of the absorbent pad 100 is not shifted in the longitudinal direction of the diaper 1.

Subsequently, both width-direction end portions 100er of the absorbent pad 100 are inserted into the space between the non-skin-side portion 43 of the pair of leakage preventing wall portions 40 and the skin-side surface of the absorbent main body 10. That is, as shown in fig. 6A, the width direction end 100er of the absorbent pad 100 is sandwiched between the first joining portion 61 and the absorbent main body 10 (skin-side sheet 12) in the thickness direction. In the present embodiment, in the longitudinal region in which the pair of first engaging portions 61 are arranged, there is a portion in which the width-direction space W61 between the inner ends 61ei of the first engaging portions 61 is shorter than the width-direction length (width) W100 of the absorbent pad 100 (W61 < W100). This makes it possible for at least a part of the widthwise end portion 100er of the absorbent pad 100 to be in a state of being sandwiched between the first engaging portion 61 and the absorbent main body 10 in the thickness direction. Therefore, the movement of the absorbent pad 100 in the thickness direction is restricted by the leakage preventing wall portions 40 (first engaging portions 61) of the diaper 1, so that the separation of the absorbent pad 100 from the diaper 1 toward the skin side in the thickness direction is suppressed.

It should be noted that, in the present embodiment, since the skin-side portion 42 and the non-skin-side portion 43 of the leakage preventing wall portion 40 are joined to each other by the first joining portion 61, the leakage preventing wall portion 40 becomes high in the region where the first joining portion 61 is provided. Further, the widthwise end 100er of the absorbent pad 100 may push the side elastic member 41 toward the skin side in the thickness direction due to the tensile force generated by the side elastic member 41 arranged at the position overlapping the first joining portion 61 in the thickness direction. Therefore, the movement of the absorbent pad 100 in the thickness direction in the region where the first joining portion 61 is provided can be reliably suppressed.

Finally, the position of the absorbent pad 100 is fixed such that the absorbent pad 100 is sandwiched between the pair of second engaging portions 62 of the leakage preventing wall portion 40 from both sides in the width direction. That is, as shown in fig. 6B, the widthwise outer end 100eo of the absorbent pad 100 (i.e., the widthwise edge of the absorbent pad 100) is in contact with the inner ends 62ei of the pair of second engaging portions 62 in the width direction. In the present embodiment, in the region of the longitudinal direction in which the second engaging portions 62 are arranged, there is a portion in which the width-direction space W62 between the inner end portions 62ei of the pair of second engaging portions 62 is equal to or shorter than the width-direction length (width) W100 of the absorbent pad 100(W62 ≦ W100). Thus, at least some portions of the widthwise outer ends 100eo of the absorbent pad 100 can be brought into contact with the widthwise inner ends 62ei of the second joining portions 62. Therefore, the movement of the absorbent pad 100 in the width direction is restricted by the second engaging portion 62, thereby making it possible to suppress the displacement of the absorbent pad 100 in the width direction.

It should be noted that in the case where the width W100 of the absorbent pad 100 is longer than the space W62 in the width direction of the pair of second joining portions 62, portions of the width-direction end portions 100er of the absorbent pad 100 are compressed and crushed in the width direction as shown in fig. 6B. That is, by the pair of second engaging portions 62, a state is caused in which the absorbent pad 100 is compressed from both sides in the width direction. In this case, the movement of the absorbent pad 100 in the width direction is more likely to be restricted, thereby making it more likely to suppress positional deviation.

Attaching the absorbent pad 100 as described above restricts the movement of the absorbent pad 100 in each of the longitudinal direction, the width direction, and the thickness direction of the diaper 1. Therefore, even if the wearer moves his/her body, positional deviation of the absorbent pad 100 is difficult to occur, making it possible to suppress leakage of excrement and/or a decrease in fit. It should be noted that, in a state where the absorbent pad 100 is adhered to the diaper 1, the front end portion fixing portion 51 and the rear end portion fixing portion 52 are provided on both outer sides of the absorbent pad 100 in the longitudinal direction, respectively, as shown in fig. 5. Therefore, even in the case where the adhesive portion 115 is not provided in the absorbent pad 100, the movement of the absorbent pad 100 in the longitudinal direction is restricted by the front end portion fixing portion 51 and the rear end portion fixing portion 52, so that it is possible to suppress the positional deviation in the longitudinal direction.

Further, as shown in fig. 5, the center CL62 of the second joint part 62 is located on the front side with respect to the center CL of the diaper 1 in the longitudinal direction of the diaper 1 in the developed state. That is, the second engaging portion 62 is provided in the front side of the diaper 1. The region on the front side in the longitudinal direction is a region sandwiched between the legs (groin) of the wearer when the diaper 1 is worn, and is a region where the absorbent pad 100 adhered to the diaper 1 may be positionally displaced due to a force acting on each leg when the wearer moves the leg forward during walking or the like. In contrast, in the diaper 1 of the present embodiment, the absorbent pad 100 is sandwiched between the second joint sections 62 provided in the regions where the force from both legs is likely to act, from both sides in the width direction. In this region, this suppresses the displacement of the absorbent pad 100 in the width direction (lateral direction).

Further, in the present embodiment, the second joint part 62 is located on the front side (ventral side) in the longitudinal direction as a whole with respect to the center CL of the diaper 1. In other words, the rear end 62eb of the second joint portion in this direction is located on the front side with respect to the center CL of the diaper 1. This makes it easier to further suppress the widthwise shift of the absorbent pad 100 in the region on the front side in the longitudinal direction. Therefore, even in the case where the wearer walks or widely moves the legs while wearing the diaper 1, it is possible to effectively suppress the positional deviation of the absorbent pad 100 adhered to the diaper 1.

Further, the absorbent core 11 of the diaper 1 has a "contracted portion 11 c" which is contracted in the width direction in a region between the front end portion 11f and the rear end portion 11b in the longitudinal direction (see fig. 5). That is, the widthwise length (width) W11c of the contracted portion 11c becomes narrower than the maximum value of the widthwise length (width) W11f (W11b) of the longitudinal front end portion 11f (rear end portion 11b) of the absorbent body 11. As described above, the absorbent core 11 is made of liquid-absorbent fibers and therefore has higher rigidity than other portions (e.g., the skin-side sheet 12 and the like) of the absorbent main body 10. Therefore, narrowing the width W11c in a region near the longitudinal direction center CL (i.e., the crotch of the wearer) will make it difficult for both widthwise ends of the high-rigidity absorbent core 11 to come into contact with the groin of the wearer. This facilitates movement of the legs and is less likely to cause discomfort to the wearer.

Further, the second joint portion 62 of the diaper 1 is arranged overlapping the contracted portion 11c in the longitudinal direction and is located outside in the width direction with respect to the absorbent core 11. The region overlapping the contraction portion 11c in the longitudinal direction and located outside with respect to the absorbent body 11 in the width direction is a region sandwiched between the legs of the wearer when the diaper 1 is worn, and thus may receive a compression force in the width direction and be deformed. Therefore, in the case where the absorbent pad 100 is used together, there is a risk that positional deviation of the absorbent pad 100 may occur in the respective regions. In contrast, in the present embodiment, the second joining portion 62 is provided in the respective regions, whereby the movement in the lateral direction of the absorbent pad 100 can be suppressed. That is, when the contracted portion 11c is provided in the absorbent core 11, the movement of the wearer's leg is less likely to be hindered. Also, even in the case where the wearer moves the legs, adjusting the positional relationship between the contraction part 11c and the second engagement part 62 can suppress the positional deviation of the absorbent pad 100.

Further, the first engaging portion 61 is located inward in the width direction with respect to the tip 42a of the leakage preventing wall portion 40 (skin-side portion 42). The region of the widthwise inner end portion in the skin-side portion 42 is a region where the widthwise end portion 100er of the absorbent pad 100 is pressed from the skin side when the absorbent pad 100 is adhered to the diaper 1 (see fig. 6A). Thus, in the vicinity of the inner end (i.e., the region inward in the width direction with respect to the tip 42a), the skin-side portion 42 and the non-skin-side portion 43 are joined to each other by the first joining portion 61, thereby increasing the strength of the leakage preventing wall portion 40. This makes it possible to stably press the absorbent pad 100. This can make it easier to suppress separation of the absorbent pad 100 from the diaper 1.

Further, as shown in fig. 5, the first engaging portion 61 is located inward in the longitudinal direction with respect to portions of the

adhesive portions

115 and 115 provided at both end portions of the absorbent pad 100 which are in contact with the diaper when the absorbent pad 100 is adhered to the diaper 1. That is, in the longitudinal direction, the first engaging portion 61 is positioned in the region between the pair of

adhesive portions

115 and 115 in the front end portion and the rear end portion of the absorbent pad 100, respectively. When the absorbent pad 100 is adhered to the diaper 1, the absorbent pad 100 is adhered and fixed to the skin side of the diaper 1 in the portion of the absorbent pad 100 where the adhesive portion 115 is provided. On the other hand, in the area between the bonded

portions

115, 115 in the longitudinal direction of the absorbent pad 100, the absorbent pad 100 is not adhered to the diaper 1, and there is a risk of positional deviation. Thus, in the present embodiment, the first engaging portion 61 is provided in the region between the

adhesive portions

115 and 115, whereby the widthwise end portion 100er of the absorbent pad 100 is pressed from the skin side by the leakage preventing wall portion 40 in the region as shown in fig. 6A. Therefore, even in the region of the absorbent pad 100 where the adhesive portion 115 is not provided, the positional shift or separation of the absorbent pad 100 can be suppressed. That is, it is possible to suppress occurrence of positional deviation of the entire absorbent pad 100.

Further, in the diaper 1, as shown in fig. 6B, the widthwise space W40 between the inner end portions 40ei of the pair of leakage preventing wall portions 40 is shorter than the widthwise space W62 between the inner end portions 62ei of the pair of second joining portions 62 (W40< W62). With this configuration, at the time of adhering the absorbent pad 100, both widthwise end portions 100er, 100er of the absorbent pad 100 are sandwiched in the widthwise direction by the pair of second engaging portions 62, so that it is possible to be covered from the skin side by the inner ends 40ei of the leakage preventing wall portions 40. This can make it easier to suppress the positional deviation of the absorbent pad 100.

Further, the first engaging portion 61 and the second engaging portion 62 do not have a portion where the first engaging portion 61 and the second engaging portion 62 overlap with each other in the longitudinal direction. That is, the first engaging portion 61 and the second engaging portion 62 are provided at positions shifted from each other in the longitudinal direction. In the leakage preventing wall section 40 of the present embodiment, since the skin-side portion 42 and the non-skin-side portion 43 are joined to each other at the portion where the first joining portion 61 is provided, the rising height thereof is restricted. Further, since the non-skin-side portion 43 is joined to the absorbent main body 10 (the skin-side sheet 12) at a portion where the second joining portion 62 is provided, the rise height is restricted. Therefore, in the case where the first engaging portion 61 and the second engaging portion 62 are formed at the same position in the longitudinal direction, the rising height of the leakage preventing wall portion 40 at that position is doubly restricted, causing the following risk: when the diaper 1 is put on, the fit may deteriorate or side leakage of excrement may occur. In contrast, in the present embodiment, the first engaging portion 61 and the second engaging portion 62 are not provided so as to overlap each other in the longitudinal direction, and this prevents the rise height of the leakage preventing wall portion 40 from being restricted significantly. This makes it possible to suppress deterioration of fit, side leakage of excrement, and the like.

Further, a predetermined distance d is provided between the outer end 62eo of the second engaging portion 62 and the outer end 40eo of the leakage preventing wall portion 40 in the width direction. That is, the outer ends 40eo of the leakage preventing wall portions 40 in the width direction do not have the adhesive forming the second joint portions 62, thereby forming so-called dry edges. The outer end portions 40eo of the leakage preventing wall portions 40 are portions which are highly likely to come into direct contact with the wearer's skin (legs) when the diaper 1 is worn. Therefore, the outer end portion 40eo is formed as a dry edge so that the feeling when worn is soft, so that the uncomfortable feeling of the wearer can be suppressed.

OTHER EMBODIMENTS

So far, the embodiments of the present invention have been described, but the above embodiments are for facilitating understanding of the present invention and are not intended to limit the explanation of the present invention. Further, the present invention may be modified or improved within the scope of the gist of the present invention, and equivalents thereof are also encompassed in the present invention, of course.

In the above embodiments, the diaper in which the front waist portion 20 and the rear waist portion 30 are separate members is described. However, a configuration is possible in which an inseam portion is provided between the front waist portion 20 and the rear waist portion 30 and the front waist portion 20 and the rear waist portion 30 are a single continuous member.

In the above-described embodiment, the various joint portions (such as the first joint portion 61 and the second joint portion 62) provided in the leakage preventing wall portion 40 are formed by adhesive means (such as using an adhesive material). But the method of forming the joint portion is not limited thereto. For example, the joining may be performed by crimping such as embossing.

List of reference numerals

1a diaper (pant-shaped absorbent article),

10 an absorbent main body of a disposable diaper for absorbing,

11-an absorbent core for use in a sanitary article,

11c, 11f front end, 11b rear end,

12 a skin-side sheet, 13 a non-skin-side sheet,

14 sheet members, 15 core wrap sheets,

a front waist portion 20, an inner sheet 21, an outer sheet 22,

23 a waist elastic member which is provided with a waist elastic member,

30 rear waist portion, 30A overlapping portion, 30B extending portion,

31 an inner sheet, 32 an outer sheet,

33 waist elastic members, 35 extension elastic members,

40 leakproof wall portions, an inner end of 40ei, an outer end of 40eo,

a 41-side elastic member (elastic member), 41A, 41B-side elastic members (elastic members),

42 skin-side portion, 42a distal end,

43 the non-skin-side portion of the skin,

51 a front end fixing portion, 511 a skin side fixing portion, 512 a non-skin side fixing portion,

52 a rear end portion fixing portion of the rear end portion,

61 the first, 61ei inner end,

62 second engagement portion, 62ei inner end, 62eo outer end, 62eb rear end,

100 absorbent pad, 100er end (width direction), 100eo outer end (width direction),

111 an absorber, 112 a skin side sheet, 113 a non-skin side sheet,

114 sheet member, 115 adhesive portion,

a W61 space (first engaging portion), a W62 space (second engaging portion),

W100 length (width direction).

Claims

1. A pants-shaped absorbent article having a longitudinal direction, a width direction and a thickness direction intersecting each other in a developed state,

the pant-shaped absorbent article has the absorbent pad attached to the skin side in the thickness direction with respect to the absorbent main body,

the pant-shaped absorbent article comprises:

an absorption body;

a pair of leakage preventing wall portions provided on both sides of the absorbent main body in the width direction, the leakage preventing wall portions being able to rise toward the skin side in the thickness direction, the pair of leakage preventing wall portions each having a skin-side portion and a non-skin-side portion, the non-skin-side portion being arranged on the non-skin side in the thickness direction with respect to the skin-side portion;

a pair of first engaging portions, each engaging at least a portion of opposing surfaces of the skin-side portion and the non-skin-side portion, the opposing surfaces being constituted by surfaces of the skin-side portion and the non-skin-side portion that face each other; and

a pair of second engaging portions each engaging at least a part of the non-skin side portion to the skin side of the absorbent body,

in a state where the pant-shaped absorbent article and the absorbent pad are stretched in the longitudinal direction and the width direction, when the absorbent pad is adhered to the pant-shaped absorbent article such that the widthwise center of the pant-shaped absorbent article and the widthwise center of the absorbent pad are aligned with each other,

in a longitudinal region in which the pair of first engaging portions are arranged, there is a portion in which a widthwise space between inner ends of the pair of first engaging portions is shorter than a widthwise length of the absorbent pad,

in the longitudinal region in which the pair of second engaging portions are arranged, there is a portion in which a widthwise space between inner ends of the pair of second engaging portions is shorter than or equal to a widthwise length of the absorbent pad.

2. The pant-shaped absorbent article of claim 1, wherein

The center of the second engaging portion is located on the front side in the longitudinal direction with respect to the center of the pant-shaped absorbent article in the unfolded state.

3. The pant-shaped absorbent article of claim 1 or 2, wherein

The entire second engaging portion is located on the front side in the longitudinal direction with respect to the center of the pant-shaped absorbent article in the unfolded state.

4. The pant-shaped absorbent article according to any of claims 1 to 3, wherein

The absorption body has an absorption core which is provided with,

the absorbent core has a contracted portion having a small width-directional length in a region between the front end portion and the rear end portion in the longitudinal direction, an

The second joint portion overlaps the contracted portion in the longitudinal direction and is located outside in the width direction with respect to the absorbent core.

5. The pant-shaped absorbent article as claimed in any of claims 1 to 4, wherein

The first engaging portion is located inward in the width direction with respect to the distal end of the leakage preventing wall.

6. The pant-shaped absorbent article according to any of claims 1 to 5, wherein

The absorbent pad has a pair of adhesive portions on both sides in the longitudinal direction, an

The first engaging portion is located inward in the longitudinal direction with respect to a position where the pair of adhesive portions come into contact with the pant-shaped absorbent article when the absorbent pad is adhered to the pant-shaped absorbent article.

7. The pant-shaped absorbent article according to any of claims 1 to 6, wherein

A widthwise space between inner ends of the pair of leakage preventing wall portions is shorter than a widthwise space between inner ends of the pair of second engaging portions.

8. The pant-shaped absorbent article according to any of claims 1 to 7, wherein

The first engaging portion and the second engaging portion do not have a portion where the first engaging portion and the second engaging portion overlap with each other in the longitudinal direction.

9. The pant-shaped absorbent article according to any of claims 1 to 8, wherein

A predetermined distance is provided between an outer end of the second engaging portion and an outer end of the leakage preventing wall portion in the width direction.

10. A pants-shaped absorbent article having a longitudinal direction, a width direction and a thickness direction which intersect with each other in a developed state,

the pant-shaped absorbent article comprises:

the absorption body;

at least a part of each of two widthwise end portions of the absorbent pad is sandwiched between the first joint portion and the absorbent body in the thickness direction, and

both widthwise edges of the absorbent pad are in contact with the second bonding portions in the widthwise direction.

11. A method of adhering an absorbent pad to a pant-shaped absorbent article on the skin side with respect to the thickness direction of the absorbent body,

the pant-shaped absorbent article has a longitudinal direction, a width direction and a thickness direction which cross each other in an unfolded state,

the pant-shaped absorbent article comprises:

an absorption body;

a pair of leakage preventing wall portions provided on both sides of the absorbent main body in the width direction, the leakage preventing wall portions being able to rise toward the skin side in the thickness direction, the pair of leakage preventing wall portions each having a skin-side portion and a non-skin-side portion arranged on the non-skin side in the thickness direction with respect to the skin-side portion;

the method comprises the following steps:

when the absorbent pad is attached to the pant-shaped absorbent article such that the widthwise center of the pant-shaped absorbent article and the widthwise center of the absorbent pad are aligned with each other,

sandwiching at least a part of each of two widthwise end portions of the absorbent pad between the first engaging portion and the absorbent body in the thickness direction; and

both widthwise edges of the absorbent pad are brought into contact with the second engaging portion in the widthwise direction.