JP6393503B2 - Pants-type absorbent article - Google Patents

Description

  The present invention relates to a pants-type absorbent article.

  A disposable diaper formed into a pants shape is generally known by folding an outer member of a diaper into two near the center in the longitudinal direction and welding and joining both side regions. In such a pants-type disposable diaper, the outer member is stretched by joining an elastic member such as a thread rubber to the outer member, thereby providing the outer member with stretchability and good fit when wearing the diaper. I try to get it. In relation to this, in patent document 1, when manufacturing a diaper, the technique which divides | segments an elastic member beforehand in the side area | region of a diaper, and welds to the said area | region after that is disclosed. According to such a diaper, since the stretching force by the elastic member does not act in the side region where welding is performed, and the exterior member does not contract, it becomes easy to form a welded portion having sufficient welding strength.

JP2013-126527A

  In the method of Patent Document 1, since the separated pieces of the elastic member remain in the side region of the diaper, the appearance of the side region may be deteriorated. On the other hand, the elastic member is cut at one place in the diaper end region, and the elastic member is contracted inward in the lateral direction of the diaper, rather than dividing the elastic member, thereby exerting stretchability in the side region. It is conceivable to prevent the elastic member from being left in the region while preventing the elastic member from being left.

  However, in such a method, when the elastic member is cut and contracted, the joint between the exterior member and the elastic member of the diaper is peeled off, and the elastic member may be detached from the diaper. In particular, since a large elastic force acts on the leg elastic member provided along the leg circumference opening of the diaper, there is a high possibility that the leg elastic member is detached from the diaper with a momentum when the leg elastic member contracts.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a pant-type diaper in which a welded portion in a side portion has a good appearance and an elastic member around a leg is not easily detached. There is.

The main invention for achieving the above object is:
A pants-type absorbent article having a longitudinal direction and a transverse direction intersecting the longitudinal direction,
An exterior member having an outer sheet positioned on the wearer's clothes side and an inner sheet superimposed on the outer sheet from the wearer's skin side, wherein the pants-type absorbent article is worn on the stomach side of the wearer An exterior member that is divided into an abdominal side that covers the back, a back side that covers the back side of the wearer, and a crotch that covers the crotch of the wearer,
An absorptive main body which is joined to the inner sheet over the wearer's skin side and absorbs excrement;
It is possible to join the outer sheet and the inner sheet along the lateral direction at the ventral part and the dorsal part, and to impart stretchability along the lateral direction to the exterior member. A plurality of waist elastic members,
In the ventral part and the dorsal part, it is joined between the outer sheet and the inner sheet along the leg-periphery opening of the pants-type absorbent article, and the leg-periphery opening with respect to the exterior member. A plurality of leg-around elastic members capable of providing stretchability along;
With
A welded portion for welding the back side portion and the ventral side portion of the exterior member is formed at both ends in the lateral direction,
The waist elastic member and the leg elastic member are joined so as to intersect each other in the region inside the lateral direction from the welded portion,
The leg-around elastic member is a continuous elastic member, and has a portion joined so as to intersect the waist elastic member, and a portion overlapping the welded portion in the lateral direction,
In the region corresponding to the welded portion in the lateral direction, there is no divided elastic member,
The pants-type absorbent article is characterized in that a stress of the leg-surrounding elastic member in the welded portion is smaller than a stress of the leg-surrounding elastic member in the laterally inner region from the welded portion.
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, the appearance of the welding part in a side part is good, and the underpants type diaper which a leg-holes elastic member cannot separate easily can be provided.

FIG. 1A is a plan view of the disposable diaper 1 in an unfolded state. 1B is a cross-sectional view taken along the line BB in FIG. 1A. It is a schematic perspective view of the diaper 1 shape | molded by the underpants type. It is a figure explaining the structure of the diaper manufacturing apparatus 100 which manufactures the diaper 1. FIG. It is a figure showing the flow of each process performed when manufacturing the diaper 1. It is a figure explaining the mode at the time of the base material of the diaper 1 being conveyed in a conveyance direction. It is a figure explaining the part in which an adhesion | attachment area | region is formed. 7A and 7B are diagrams illustrating the arrangement of the leg-hole elastic member 8L. It is a figure explaining a mode that the base material of the diaper 1 of the folded state is conveyed. It is a figure explaining a mode at the time of an elastic member being cut | disconnected in an elastic member cutting process (S107). It is a figure explaining the seal block. It is a figure explaining the welding part formed in a welding process (S108). It is a figure explaining arrangement | positioning of the leg periphery elastic member 8L and the waist elastic member 8F in the side area vicinity of the diaper 1. FIG. It is a figure which shows the area | region which cut | disconnects the waist elastic member 8F in the center part of the horizontal direction of the diaper 1. FIG.

At least the following matters will become apparent from the description of the present specification and the accompanying drawings.
A pants-type absorbent article having a longitudinal direction and a transverse direction intersecting with the longitudinal direction, the outer sheet positioned on the wearer's clothes side and the inner side superimposed on the outer sheet from the wearer's skin side An exterior member having a sheet, the abdomen side covering the abdomen side of the wearer when wearing the pant-type absorbent article, the back side part covering the back side of the wearer, and the crotch of the wearer The crotch part to be covered, and the exterior member, and the absorbent main body that is overlapped and joined to the inner sheet from the skin side of the wearer, and absorbs excrement, the ventral side part and the back side part, A plurality of waistline elastic members joined between the outer sheet and the inner sheet along the lateral direction and capable of imparting stretchability along the lateral direction to the exterior member; In the side part and the dorsal side part, the pants type A plurality of legs that are joined between the outer sheet and the inner sheet along the leg-periphery opening of the absorptive article and are capable of imparting elasticity to the exterior member along the leg-periphery opening. A circumferential elastic member, and welded portions for welding the back side portion and the abdominal side portion of the exterior member are formed at both ends in the lateral direction, and the waist elastic member and the leg circumference The elastic members are joined so as to intersect each other in the region inside the lateral direction from the welded portion, and the stress of the elastic member around the leg in the welded portion is in the region inside the lateral direction from the welded portion. A pants-type absorbent article, wherein the pants-type absorbent article is smaller than the stress of the leg elastic member.

  According to such a pant-type absorbent article, it is possible to realize a pant-type diaper in which the welded portion in the side portion is good and the leg-around elastic member is not easily detached.

  In this pant-type absorbent article, it is desirable that at least a part of the plurality of leg-hole elastic members intersects two or more different waist-hole elastic members among the plurality of waist-hole elastic members. .

  According to such a pants-type absorbent article, even when the adhesive portion between the outer sheet (inner sheet) and the leg elastic member is peeled off, the leg elastic member is crossed with the waist elastic member. Since the contraction is stopped, the leg-around elastic member is difficult to be detached from the outer sheet (inner sheet).

  In this pant-type absorbent article, all the leg elastic members among the plurality of leg elastic members intersect with two or more different waist elastic members among the plurality of waist elastic members. It is desirable.

  According to such a pants-type absorbent article, even when the adhesive portion between the outer sheet (inner sheet) and the leg elastic member is peeled off, the leg elastic member is crossed with the waist elastic member. Since the contraction is stopped, it becomes difficult for all the leg-hole elastic members to be detached from the outer sheet (inner sheet).

  In such a pants-type absorbent article, the leg elastic member is disposed at a position closer to the inner sheet than the waist elastic member at a location where the leg elastic member and the waist elastic member intersect. It is desirable that

  According to such a pants-type absorbent article, since the leg-around elastic member is disposed at a position away from the non-skin side sheet provided on the non-skin side of the wearer, the non-skin side sheet is the wearer's clothes. The impact generated when rubbing against the leg becomes difficult to be transmitted to the elastic members around the legs. Thereby, the adhesion part of a leg periphery elastic member becomes difficult to peel, and a leg periphery elastic member becomes difficult to detach | leave more.

  In such a pants-type absorbent article, after the leg elastic member is joined to the inner sheet or the outer sheet, the waist elastic member is joined to the leg elastic member. It is desirable.

  According to such a pants-type absorbent article, since the leg-around elastic member is disposed at a position away from the non-skin side sheet provided on the non-skin side of the wearer, the non-skin side sheet is the wearer's clothes. The impact generated when rubbing against the leg becomes difficult to be transmitted to the elastic members around the legs. Thereby, the adhesion part of a leg periphery elastic member becomes difficult to peel, and a leg periphery elastic member becomes difficult to detach | leave more.

  In such a pants-type absorbent article, it is desirable that an adhesive is applied to at least one of the leg elastic member and the waist elastic member.

  According to such a pant-type absorbent article, the amount of adhesive increases at the intersection of the leg elastic member and the waist elastic member, so that they are more strongly bonded to each other and the leg elastic member is released. Can be difficult. Moreover, since the process of apply | coating an adhesive agent and the process of arrange | positioning an elastic member can be collectively performed when manufacturing a diaper, it becomes easy to simplify a manufacturing process and a manufacturing apparatus.

  In this pant-type absorbent article, it is desirable that at least one of the leg-surround elastic member and the waist elastic member is a stretchable sheet member having a predetermined width.

  According to such a pants-type absorbent article, it is possible to increase the area of the intersecting portion at the portion where the waist elastic member 8 and the leg elastic member intersect. Thereby, since the waist elastic member and the leg elastic member are more firmly fixed, the leg elastic member is less likely to be detached.

  In such a pants-type absorbent article, it is desirable that a part of the waist elastic member has one or more cut portions in the central portion in the lateral direction.

  According to such a pants-type absorbent article, since the lateral expansion and contraction force of the region where the absorbent main body is joined can be weakened, the absorbent main body is prevented from being excessively contracted and narrowing. And it can suppress that excrement leaks outside from the side field of an absorptive main part in the part concerned.

  In this pant-type absorbent article, at least one of the outer sheet and the inner sheet is formed with an adhesive region that joins the elastic members around the legs, and the adhesive region includes the welded portion and the welded portion. It is desirable to have areas that do not overlap in the lateral direction.

  According to such a pants-type absorbent article, the component of the adhesive applied to the adhesion region is less likely to adhere to the welded portion forming apparatus. Thereby, it is suppressed that the frequency | count of a maintenance of a welding part formation apparatus increases, or the continuous manufacture of a diaper is prevented.

=== Embodiment ===
<Basic configuration of diaper 1>
First, a basic configuration of a pants-type disposable diaper (hereinafter also referred to as diaper 1) will be described as an example of the absorbent article handled in the present embodiment. 1A is a plan view of the diaper 1 in an unfolded state, and FIG. 1B is a cross-sectional view taken along the line BB in FIG. 1A. FIG. 2 is a schematic perspective view of the diaper 1 formed into a pants shape.

  As shown in FIGS. 1 and 2, the diaper 1 has a vertical direction, a horizontal direction that intersects the vertical direction, and a thickness direction that intersects the vertical direction and the horizontal direction. And the exterior member 10 which has the outer side sheet 5 located in a wearer's clothes side as the component, and the inner side sheet | seat 7 overlapped and joined to the outer side sheet 5 from the wearer's skin side with respect to the thickness direction. And a liquid-absorbing absorbent main body 3 that is superposed on the inner sheet 7 from the wearer's skin side in the thickness direction and absorbs excrement such as urine. The outer sheet 5 and the inner sheet 7 are each a flexible sheet-like member having elasticity, and is formed of, for example, a nonwoven fabric or the like. Further, as shown in FIG. 1B, the longitudinal length of the outer sheet 5 is longer than the longitudinal length of the inner sheet 7, and the outer sheet 5 is folded back at the longitudinal edge 10e in the unfolded diaper 1. And configured to cover the longitudinal end region of the absorbent main body 3. In the following description, the outer sheet 5 and the inner sheet 7 superimposed on the outer sheet 5 are collectively referred to as an exterior member 10.

  The exterior member 10 has the outer shape of the diaper 1 in the unfolded state, and the planar shape thereof is a substantially hourglass shape (see FIG. 1A). That is, the exterior member 10 (the outer sheet 5 and the inner sheet 7) has a shape in which both end edges in the horizontal direction are recessed inward in the horizontal direction at the center in the vertical direction. Moreover, the exterior member 10 is divided into an abdominal side part 10A that covers the wearer's abdomen, a crotch part 10B that covers the same crotch part, and a back side part 10C that covers the same back part with respect to the vertical direction. And from this unfolded state, it is folded in half with the substantially central position in the vertical direction as the folding position, and the lateral end portion 10ae of the ventral side portion 10A and the lateral end portion 10ce of the back side portion 10C are joined (seal). By doing so, the pants-type diaper 1 is formed in which the waistline opening 1hB and the pair of leg-hole openings 1hL, 1hL as shown in FIG. 2 are formed. The joined lateral end 10ae and lateral end 10ce form a lateral end 10s of the diaper 1 as shown in FIG.

  The absorptive main body 3 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. In addition, the shape of the absorptive main body 3 does not need to be a rectangle as shown in FIG. 1A, and may be a substantially hourglass shape such as the exterior member 10, for example. The absorbent main body 3 absorbs and holds the liquid 3d, and the liquid permeable top sheet 3s that allows the excrement such as urine to pass through while covering the absorbent 3d from the skin side of the wearer, and the same absorption A liquid-impermeable back sheet 3b formed by a film or the like that covers the body 3d from the non-skin side and prevents leakage of liquid from the non-skin side. The absorbent body 3d is formed by molding liquid absorbent fibers such as pulp fibers into a predetermined shape such as a substantially rectangular parallelepiped, and a superabsorbent polymer is mixed therein. The absorber 3d may be covered with a tissue paper. Moreover, you may provide the three-dimensional gather part (leak-proof cuff) which prevents a side leak with respect to each edge of the horizontal direction in the absorptive main body 3, respectively.

  Further, a plurality of elastic members 8B, 8F, 8L,... Made of thread rubber or the like are disposed between the outer sheet 5 and the inner sheet 7 at appropriate positions in the exterior member 10. These elastic members 8B, 8F, 8L... Impart stretchability to the diaper 1. For example, the longitudinal edge portions 10e and 10e of the exterior member 10 (the edge portion 10e forming the waistline opening portion 1hB in the ventral side portion 10A and the edge portion 10e forming the waistline opening portion 1hB in the back side portion 10C) A plurality of waistline elastic members 8B, 8B are respectively provided along the lateral direction. These waistline elastic members 8B, 8B are bonded and fixed to the outer sheet 5 and the inner sheet 7 in a state of being stretched in the lateral direction, whereby the waistline openings corresponding to the respective edge portions 10e, 10e. Elasticity is imparted to the portion 1hB. Similarly, a plurality of waistline elastic members 8F, 8F,... Are also provided in the horizontal direction at positions on the center side in the vertical direction with respect to the arrangement positions of the waistline elastic members 8B. These waist elastic members 8F, 8F... Are partly bonded and fixed to the outer sheet 5 and the inner sheet 7 in a state of being stretched in the lateral direction, whereby the waistline openings 1hB and the longitudinal direction are aligned. The stretchability of the horizontal direction is provided to each part between the center positions.

  Further, among the edge portions in the lateral direction of the exterior member 10, the edge portions 10eL, 10eL forming the leg opening 1hL are respectively provided with a plurality of leg periphery elastic members 8L, 8L,. These leg-around elastic members 8L, 8L,... Are partially fixed to the outer sheet 5 and the inner sheet 7 in a state where they extend along the edges 10eL, 10eL. That is, the leg-hole elastic members 8L, 8L,... Are held by the exterior member 10 in a state of being extended in the vertical direction and the horizontal direction, as shown in FIG. 1A. Thereby, stretchability is imparted to the exterior member 10 along the edge portions 10eL and 10eL forming the leg opening portions 1hL and 1hL. Note that the leg-surrounding elastic member 8L is provided in a state in which the leg-surrounding elastic member 8B is stretched more strongly than the waistline elastic member 8B and the waistline elastic member 8F, thereby exhibiting greater stretchability with respect to the leg-hole opening 1hL. By increasing the stretchability of the leg opening 1hL, the fit around the leg of the wearer is enhanced when the diaper 1 is worn, and a gap is formed between the leg of the wearer and the leg opening 1hL. Suppress. Thereby, it can be made hard to produce problems, such as excretion leaking out of the diaper 1 from the crevice between a wearer's leg and leg opening 1hL.

<Details of diaper 1 structure>
Then, the detailed structure of the diaper 1 which concerns on this embodiment is demonstrated with the manufacturing method of the diaper 1. FIG.

  FIG. 3 is a diagram illustrating the configuration of the diaper manufacturing apparatus 100 that manufactures the diaper 1. Drawing 4 is a figure showing the flow of each process performed when manufacturing diaper 1 by this embodiment. The diaper 1 is continuously manufactured by performing each process represented by S101 to S109 in FIG.

  The diaper manufacturing apparatus 100 (hereinafter also simply referred to as the manufacturing apparatus 100) includes a transport mechanism 101, an adhesive region forming mechanism 110, an elastic member arrangement mechanism 120, an overlapping mechanism 130, an absorbent main body joining mechanism 140, and a folding. It has a mechanism 150 and a cutting / welding mechanism 170 (see FIG. 3).

  The transport mechanism 101 is a mechanism for transporting the base material of the diaper 1 at a predetermined transport speed along a predetermined transport direction. Here, the “base material of the diaper 1” is a belt-like member that is continuously formed in a state where a plurality of outer sheets 5 (or inner sheets 7) as shown in FIG. 1A are connected in the lateral direction. Hereinafter, a band-shaped member in which the outer sheet 5 is continuous in the horizontal direction is referred to as an outer band-shaped member 15, and a band-shaped member in which the inner sheet 7 is continuous in the horizontal direction is referred to as an inner band-shaped member 17. Further, the “conveying direction” is a direction along the lateral direction of the exterior member 10 in FIG. 1A. In addition, a direction that intersects the transport direction (that is, a direction along the longitudinal direction of the exterior member 10) is referred to as a “cross direction”.

  The transport mechanism 101 includes a transport roller 101A that transports the base material in the transport direction and a support roller 101B that supports the transported base material by rotating while sandwiching the base material of the diaper 1 in the thickness direction. It is possible to change the conveyance speed by changing the rotation speed of the conveyance roller 101A. The arrangement and the number of arrangement of the transport roller 101A and the support roller 101B are determined based on the size and shape of the manufacturing apparatus 100. While the outer belt-like member 15 and the inner belt-like member 17 are carried in the carrying direction by the carrying mechanism 101 (S101), the diaper 1 is manufactured by sequentially executing the processes of S102 to S109.

  FIG. 5 is a diagram illustrating a state when the base material of the diaper 1 is transported in the transport direction. FIG. 5 illustrates a state in which the outer band member 15 and the inner band member 17 are conveyed in a state of being overlapped so as to sandwich the elastic members 8B, 8F, and 8L in steps S101 to S104. In the following description, a method in which the elastic members 8B, 8F, 8L and the inner band member 17 are overlapped with the outer band member 15 to be conveyed will be described. The members 15 and the like may be stacked.

  The outer belt-like member 15 is conveyed toward the conveyance direction in a state where the outer sheets 5 adjacent in the conveyance direction (the lateral direction of the diaper 1) are connected at the cutting location CL. The cutting location CL is a position that serves as a reference when the outer sheet 5 is separated from the outer belt-shaped member 15 in a separation step (S109) described later. That is, it is a position that forms a cutting line for cutting the exterior member 10 of the diaper 1 into individual pieces from the belt-shaped member, and is a portion that forms the lateral end portion 10s of the diaper 1 when the diaper 1 is formed into a pants shape (FIG. 2). The cutting points CL are set at an interval (pitch) of P1 in the transport direction. This interval P1 corresponds to the lateral length before contraction of the abdominal side portion 10A and the back side portion 10C of the exterior member 10.

  When the outer band member 15 passes through the adhesive region forming mechanism 110 in the process of being transported in the transport direction by the transport mechanism 101, an adhesive is adhered to a predetermined region. As a result, an adhesive region is formed on the surface of the outer band member 15 (S102). FIG. 6 is a diagram for explaining a portion where an adhesive region is formed, and is an enlarged view of a region A in FIG. In FIG. 6, the elastic members 8B, 8F, and 8L are arranged on the outer belt-like member 15, but the elastic member is arranged in the next step (S103) in the present embodiment, and an adhesion region forming step. It is assumed that the elastic members 8B, 8F, and 8L are not yet arranged when the adhesive is attached to the outer band member 15 in (S102).

  The adhesive region forming mechanism 110 includes an adhesive coating machine (not shown) capable of applying an adhesive to a predetermined region on the outer belt-shaped member 15, and while the outer belt-shaped member 15 is transported in the transport direction. In addition, an adhesive region is formed by applying an adhesive to the region indicated by the shaded portion of FIG. For example, a hot-melt adhesive is used as the adhesive that forms the adhesive region. In the present embodiment, an adhesive is applied to both sides of the cutting direction CL of the lower belt-like member 15 in the conveyance direction, thereby forming a pair of adhesion areas HMA sandwiching the cutting location CL in the conveyance direction. In the example shown in FIG. 6, the shape of the adhesive region HMA is a substantially rectangular shape that extends long along the intersecting direction. The shape and size of the bonding area HMA can be appropriately changed according to the size of the diaper 1 and the type of the base material, but the elastic members 8L and 8F can be firmly bonded and fixed in the bonding area HMA. The size should be as large as possible. Further, the region to which the adhesive is applied is not limited to the wearing region HMA in FIG. Actually, the adhesive is intermittently applied also to the inner region in the conveying direction (that is, the region between the cut portions CL and CL), whereby the elastic members B, 8F, 8L can be bonded and fixed to the outer belt-like member 15.

  In the above description, the adhesive region HMA is formed on the outer belt member 15 side by attaching an adhesive to the outer belt member 15, but the inner region is formed by attaching an adhesive to the inner belt member 17. An adhesive region HMA may be formed on the belt-like member 17 side. Alternatively, the adhesive region HMA may be formed on both the outer belt member 15 and the inner belt member 17 by attaching an adhesive.

  After the bonding area HMA is formed, the elastic members 8B, 8F, and 8L are respectively arranged by the elastic member arrangement mechanism 120 (S103). The elastic member arrangement mechanism 120 is arranged on the downstream side in the conveyance direction of the adhesion region forming mechanism 110, and includes a conveyance direction elastic member arrangement unit 121 that arranges the waist elastic member 8B and the waist elastic member 8F along the conveyance direction, and a leg. A cross direction elastic member arrangement portion 122 that arranges the circumference elastic member 8L along a position where the leg circumference opening 1hL is formed.

  The conveyance direction elastic member placement portion 121 is thrown into the outer band member 15 (or the inner band member 17) conveyed in the conveyance direction while extending the waist elastic member 8B and the waist elastic member 8F in the conveyance direction. As shown in FIG. 5, a plurality of waistline elastic members 8B are arranged in a state of extending along the conveying direction in regions of both ends in the cross direction of the outer band member 15 (inner band member 17). At this time, each of the waistline elastic members 8B is arranged so that at least a part of the region overlaps the adhesion region HMA (shaded portion in FIG. 6) formed in S102. Similarly, a plurality of waist elastic members 8F are arranged in a stretched state along the transport direction in a region on the inner side of both ends in the cross direction of the outer band member 15 (inner band member 17). At this time, each waist elastic member 8F is arranged so that at least a part of the area overlaps the adhesion area HMA formed in S102.

  The cross-direction elastic member placement portion 122 is a rock that is thrown into the outer belt member 15 (or the inner belt member 17) conveyed in the conveyance direction in a state where the leg elastic member 8L is extended while reciprocating in the cross direction. It is a moving device. 7A and 7B are diagrams illustrating the arrangement of the leg-hole elastic member 8L. In the example of FIG. 7A, the leg-hole elastic member 8L1 is put in a meandering pattern such as a sine curve in the upper region from the center position in the crossing direction of the outer band member 15. Similarly, the leg-hole elastic member 8L2 is thrown in a meandering pattern such as a sine curve in a region below the center position in the intersecting direction. At this time, the leg-hole elastic members 8L1 and 8L2 are arranged so that at least a part of the area overlaps the adhesion area HMA formed in S102. Further, the leg-surrounding elastic member 8L1 and the leg-surrounding elastic member 8L2 may be arranged so as to intersect each other in a partial region. In the example of FIG. 7B, the leg-surrounding elastic member 8L1 and the leg-surrounding elastic member 8L2 are arranged so as to intersect each other in the vicinity of an intermediate portion between the cutting points CL adjacent to each other in the transport direction.

  By performing the elastic member arranging step (S103), as shown in FIG. 6, the elastic members 8B, 8F, and 8L are arranged on the outer band member 15 (or the inner band member 17), respectively. At this time, the leg elastic member 8L is arranged so as to intersect with a part of the waist elastic member 8F. In FIG. 6, the leg elastic members 8L are arranged so as to intersect with the waist elastic members 8F at several places in the regions on both sides in the conveyance direction of the adhesive region HMA formed on both sides in the conveyance direction of the cut portion CL. Has been. In the configuration of the manufacturing apparatus 100 shown in FIG. 3, the conveyance direction elastic member arrangement unit 121 is provided on the upstream side in the conveyance direction, and the cross direction elastic member arrangement unit 122 is provided on the downstream side in the conveyance direction. The waist elastic member 8F and the leg elastic member 8L are arranged in this order on the outer band member 15 from the non-skin side in the thickness direction. Although details will be described later, by disposing the leg elastic member 8L at a position far from the non-skin side, the adhesion portion of the leg elastic member 8L bonded and fixed to the exterior member 10 can be made difficult to peel off.

  Moreover, the elastic member arrangement | positioning mechanism 120 may be the structure by which the cross direction elastic member arrangement | positioning part 122 is provided in the upstream of a conveyance direction, and the conveyance direction elastic member arrangement | positioning part 121 is provided in the downstream of a conveyance direction. In this case, the leg elastic member 8L is arranged first, and the waist elastic member 8F is arranged on the leg elastic member 8L. That is, the leg-surrounding elastic member 8L is fixed between the base material of the diaper 1 (the outer band-shaped member 15 or the inner band-shaped member 17) and the waistline elastic member 8F.

  In the above description, the adhesive region HMA is formed by attaching an adhesive to a predetermined region of the belt-shaped member to be conveyed. However, the method for forming the adhesive region HMA is not limited to this. For example, an adhesive member is attached to the belt-like member by disposing an elastic member having an adhesive applied to a predetermined region in at least one of the outer belt-like member 15 and the inner belt-like member 17 in a stretched state. An HMA may be formed. That is, the adhesion region forming step (S103) and the elastic member arranging step (S104) may be performed simultaneously. At this time, an adhesive may be applied to at least one of the outer band member 15 and the inner band member 17 and then the adhesive may be further applied to the elastic member side. By applying an adhesive to both the belt-shaped member and the elastic member, the adhesive force of the elastic member in the bonding region HMA can be further improved. Moreover, the diaper 1 can be efficiently manufactured by performing the adhesion region forming step and the elastic member arranging step at the same time. However, it should be noted that when the adhesive is applied to the elastic member, the conveyance direction position of the adhesion region HMA is not shifted. That is, it is necessary to adjust sufficiently so that the area | region which applies an adhesive agent to an elastic member and the position at the time of arrange | positioning an elastic member to a strip | belt-shaped member may not shift | deviate.

  After each elastic member is arranged, the inner band member 17 is overlaid by the overlapping mechanism 130 on the outer band member 15 and the elastic members 8B, 8F, 8L arranged on the outer band member 15 ( S104). And both are adhere | attached in the adhesion | attachment area | region HMA by pressing so that the inner side strip | belt-shaped member 17 may be pressed on the outer side strip | belt-shaped member 15 from thickness direction. Thereby, the elastic members 8B, 8F, and 8L are fixed in a state where the elastic members 8B, 8F, and 8L are sandwiched between the outer band member 15 and the inner band member 17 in the thickness direction, and the exterior member 10 of the diaper 1 is formed. In addition, the length of the outer band member 15 in the cross direction is longer than the length of the inner band member 17 in the cross direction. Therefore, at the time of S <b> 104, the regions at both ends in the cross direction of the outer band member 15 are in a state of protruding from the regions at both ends in the cross direction of the inner band member 17.

  In the elastic member arranging step (S103), the elastic members 8B, 8F, and 8L are arranged in an extended state. Therefore, the elastic members 8B, 8F, and 8L are fixed to the outer band member 15 and the inner band member 17 by being sandwiched between the outer band member 15 and the inner band member 17 in this step (S104), so that the outer member 10 (the outer band member 15 and the inner band member of the diaper 1). Elasticity can be imparted to the member 17). For example, the leg elastic member 8L can impart stretchability along the leg opening 1hL, and the waist elastic member 8B and waist elastic member 8F can impart stretchability along the transport direction.

  Further, after the outer band member 15 and the inner band member 17 are overlapped in the overlapping step (S104), the leg periphery opening 1hL is formed. The leg opening 1hL is opened at a position represented as an edge 10eL of the exterior member 10 in FIG. 1A by using a cutting device (not shown) at a position around the cutting point CL in the transport direction. The leg opening 1hL can be formed at a predetermined timing at the same time as or after the position of the cutting point CL is determined. Moreover, the leg periphery opening part 1hL may be formed with respect to the outer side strip | belt-shaped member 15 and the inner side strip | belt-shaped member 17 in the step before a superimposition process (S104), respectively.

  Then, the absorptive main body 3 is arrange | positioned and joined by the absorptive main body joining mechanism 140 from the skin side of the thickness direction of the inner side strip | belt-shaped member 17 piled up and adhere | attached with the outer side strip | belt-shaped member 15 (S105). The absorbent main body 3 itself may be manufactured separately in an unillustrated absorbent main body production line, and the absorbent main body joining mechanism 140 itself is configured to include the manufacturing section of the absorbent main body 3. It may be. As shown in FIG. 5, the absorbent main body 3 is disposed at a middle position in the conveying direction of the cut portions CL and CL (that is, the central portion in the lateral direction of the exterior member 10) so that the longitudinal direction thereof is along the intersecting direction. And bonded to the surface of the inner belt-like member 17 by an adhesive or the like. In addition, after the absorbent main body 3 is joined, the protruding portion of the end portion in the cross direction of the outer belt-shaped member 15 is bent so as to cover the absorbent main body 3 from the upper side in the thickness direction (see FIG. 1B), and partly Is bonded to the absorbent main body 3 and the inner strip member 17.

  After the absorbent main body 3 is joined, the folding mechanism 150 folds the inner band member 17 at the center in the crossing direction so as to be inside the outer band member 15 (S106). Drawing 8 is a figure explaining signs that the substrate of diaper 1 of the folded state is conveyed after the process of S105. As shown in the figure, by folding at the central portion in the cross direction, the abdomen side portion 10A and the back side portion 10C of the diaper 1 are overlapped in the thickness direction, and the pants-type base material is connected in the transport direction. . In this step, the belt-like member and the absorbent main body 3 are simply folded and overlapped, and the abdominal side portion 10A and the back side portion 10C are not joined to each other.

  Subsequently, the elastic member is cut at the cut portion CL with respect to the outer band member 15 and the inner band member 17 in a superposed state (S107). The elastic member is cut using a cutting / welding mechanism 170. In the present embodiment, the cutting / welding mechanism 170 also performs the next step of welding (S108) and the separation of the base material (S109), but the respective steps may be performed by separate apparatuses.

  As shown in FIG. 3, the cutting / welding mechanism 170 includes an anvil roll 71, a precut roll 72, a seal roll 73, and a cutter roll 74. The anvil roll 71 is a drum-like rotating body, and has a suction mechanism (not shown) on its peripheral surface, and rotates in a state where the outer belt-like member 15 and the inner belt-like member 17 are fixed to the peripheral surface by suction. The members 15 and 17 are conveyed in the rotation direction. A plurality of anvil blocks 711 are provided on the peripheral surface of the anvil roll 71. The anvil block 711 is a member that is long in the axial direction of the anvil roll 71 (corresponding to the crossing direction described above). The pre-cut roll 72 is a rotating body arranged at a position facing the anvil roll 71, and cuts an elastic member fixed in an extended state to the outer band member 15 and the inner band member 17 in advance before welding ( Used when pre-cut). A cutter block 721 is provided on the peripheral surface of the pre-cut roll 72 along the axial direction (corresponding to the crossing direction). Then, when the pre-cut roll 72 rotates in the opposite direction while the anvil roll 71 rotates, the anvil block 711 and the cutter block 721 provided on the peripheral surface of the anvil roll 71 have a positional relationship in which they are periodically opposed. . In the present embodiment, the positional relationship in which the anvil block 711 and the cutter block 721 face each other in accordance with the timing at which the belt-like members 15 and 17 are conveyed by a pitch P1 between two adjacent cutting points CL and CL in the conveyance direction. It is adjusted to become. The cutter block 721 is provided with a cutter portion along the axial direction (corresponding to the intersecting direction), and at the timing when the cutter portion and the anvil block 711 of the anvil roll 71 face each other and come into contact with the base material, The elastic members 8B, 8F, and 8L can be cut at the same time.

  FIG. 9 is a diagram for explaining a state when the elastic member is cut in the elastic member cutting step (S107), and represents a region corresponding to FIG. In FIG. 9, when the elastic member is cut along the cut portion CL, the elastic members 8B, 8F, and 8L arranged in the extended state are transported from the cut portion (cut portion CL) to the cut portion CL. It shrinks toward the bonding area HMA formed on both sides in the direction. This operation is also called “cutback” of the elastic member.

  In the region between the cut portion CL and the bonding region HMA, the elastic members 8B, 8F, and 8L are not bonded to the outer band member 15 and the inner band member 17, so that the elastic members 8B, 8F, and 8L are cut back. At this time, basically, the outer band member 15 and the inner band member 17 do not contract, and only the elastic members 8B, 8F, and 8L contract in the transport direction. Then, the cut-back elastic members 8B, 8F, and 8L contract toward the bonding area HMA from the cut portion CL, and stop at a position where the end of the elastic member slightly protrudes from the conveyance direction end of the bonding area HMA (FIG. 9). In the present embodiment, in the next welding step (S108), a plurality of welded portions sl are intermittently formed along the crossing direction in the region between the cut portion CL and the adhesion region HMA (see FIG. 11), and elastically The protruding portion of the member is held between the welded portions sl and sl adjacent to each other in the intersecting direction. That is, some elastic members 8B, 8F, and 8L may exist in the region where the welded portion sl is formed. And if the elastic force by elastic member 8B, 8F, 8L acts on the area | region in which the welding part sl is formed, a wrinkle will generate | occur | produce in the outer side belt-like member 15 and the inner side belt-like member 17 in that area | region, and a welding part can be formed normally. There is a risk of disappearing. However, by cutting back the elastic members 8B, 8F, and 8L, the stress of the elastic members 8B, 8F, and 8L in the region where the welded portion sl is formed is more inward in the transport direction than the region where the welded portion sl is formed. It becomes smaller than the stress of the elastic members 8B, 8F, 8L in the region. That is, in the region where the welded portion sl is formed between the cut portion CL and the bonding region HMA, the elastic force due to the elastic members 8B, 8F, and 8L hardly acts on the outer belt member 15 and the inner belt member 17. . Thereby, when welding is performed in the side region of the diaper 1 (lateral end portion 10s in FIG. 2), sufficient welding strength can be easily ensured. Moreover, since it becomes difficult to generate | occur | produce a wrinkle in the said area | region, the appearance of the diaper 1 becomes good and the touch in the side area | region of the diaper 1 becomes smooth.

  Further, as described above, in the present embodiment, the plurality of elastic members 8B, 8F, 8L are each cut at one place at the cutting place CL. That is, the elastic member is not cut at a plurality of locations in the transport direction, but is cut at one location in the transport direction. More specifically, each of the plurality of elastic members is cut at one place between a pair of adhesion regions HMA formed on both sides of the cutting place CL in the conveying direction. And the cut | disconnected elastic member cuts back and shrink | contracts to the edge part vicinity of the adhesion | attachment area | region HMA. Therefore, the problem that a plurality of divided elastic member pieces remain as foreign matters in the side region of the diaper 1 or the cut elastic member protrudes from the side region of the diaper 1 is less likely to occur. Further, when welding is performed in the next step, it is possible to prevent the welded strength from being sufficiently obtained due to the divided elastic member adhering to the welding surface.

  After the elastic members 8B, 8F, and 8L are cut (pre-cut), the abdomen portion 10A and the dorsal portion 10C in a superposed state are welded in a predetermined region (S108). The welding is performed by heat welding (heat sealing) or ultrasonic welding (sonic sealing). In the following, a case where heat welding is performed using the seal roll 73 provided in the cutting / welding mechanism 170 will be described, but ultrasonic welding may be performed.

  The seal roll 73 is a rotating body that is disposed at a position facing the anvil roll 71 on the downstream side in the transport direction (rotation direction) of the pre-cut roll 72 and has a circumferential surface along the axial direction (corresponding to the crossing direction). A seal block 731 is provided. And when the seal roll 73 rotates in the opposite direction while the anvil roll 71 rotates, the anvil block 711 and the seal block 731 described above are in a positional relationship in which they periodically face each other. In FIG. 3, the seal blocks 731 are provided at positions where the circumferential direction of the seal roll 73 is equally divided into four, but the number of the seal blocks 731 is not limited to four.

  FIG. 10 is a diagram illustrating the seal block 731. The seal block 731 includes convex portions 732 arranged in the transport direction (rotation direction). A plurality of rectangular portions 732 a protruding in the thickness direction are intermittently arranged in the convex portion 732 along the crossing direction (axial direction). When the rectangular part 732a faces the anvil block 711 of the anvil roll 71 and contacts the base material, the rectangular part 732a is heated by heating the base part with the heated rectangular part 732a and the anvil block 711. It is possible to heat-weld (heat-seal) the region corresponding to the arrangement. Note that the shape of the rectangular portion 732a is not limited to the example shown in FIG. 10, and is not necessarily rectangular. For example, it may be a triangle or a circle. Further, the number of the rectangular portions 732a can be appropriately changed according to the width of the welding range and the welding conditions.

  FIG. 11 is a diagram illustrating a welded portion formed in the welding step (S108), and represents a region corresponding to FIG. While the outer belt-like member 15 and the inner belt-like member 17 are conveyed along the peripheral surface of the anvil roll 71, the anvil block 711 and the seal block 731 face each other in a predetermined region including the cutting point CL. Welding is performed at the timing to form a welded portion sl as shown in FIG.

  The welded portion sl is formed based on the shape of the convex portion 732 of the seal block 731 described above. Specifically, a plurality of rectangular welded portions sl are intermittently formed along the crossing direction on both sides of the cutting location CL in the conveying direction. As described above, the elastic member 8B, 8F, 8L has a very small stress in the region between the cut portion CL and the bonding region HMA by cutting the elastic member in advance in step S107 and cutting it back. The stretch force is hardly applied to the belt-like member 15 and the inner belt-like member 17. For this reason, even if welding is performed in the region, problems such as shrinkage of the welded portion due to the influence of the elastic member hardly occur, and sufficient welding strength can be easily secured. Moreover, since the welding part does not shrink in the side region of the diaper 1, the appearance of the diaper 1 as a whole is improved.

  The welded portion sl of the present embodiment is formed so as not to overlap with the adhesion region HMA in at least a partial region in the transport direction. And when the welding part sl and the adhesion | attachment area | region HMA overlap in a conveyance direction, it is desirable that the said overlap part is as small as possible. If the welded portion sl is formed so as to overlap the entire region of the adhesive region HMA, there is a risk that the weld strength of the welded portion sl may not be sufficiently obtained due to the oil content of the hot melt adhesive forming the adhesive region HMA. Because there is. Further, the hot melt adhesive adheres to the seal block 731 (ultrasonic horn in the case of performing ultrasonic welding), so that the number of times of maintenance of the cutting / welding mechanism 170 is increased or continuous production of the diaper 1 is hindered. Problems may occur. For this reason, in the present embodiment, the adhesive region HMA and the welded portion sl are overlapped only for a part of the region, and are not overlapped in most part, so that the welded portion sl can obtain a sufficient weld strength. . In the case of FIG. 11, only the region of the welding direction sl end in the conveyance direction (end far from the cutting location) and the region of the adhesion region HMA in the conveyance direction (end closer to the cutting location) overlap. I am doing so.

  Note that the welded portion sl and the bonding area HMA are overlapped in a partial area in the transport direction because the elastic member 8B bonded to the outer band member 15 and the inner band member 17 in the bonding area HMA, This is for fixing 8F and 8L more firmly. For example, the elastic members 8B, 8F, and 8L are bonded to the outer belt-like member 15 and the inner belt-like member 17 in the bonding region HMA by forming the welded portion sl on the part of the bonding region HMA. Thus, the elastic members 8B, 8F, and 8L are separated from the bonding region HMA because they are sandwiched and held between the outer band member 15 and the inner band member 17 pressed in the thickness direction by the welded portion sl. It becomes difficult.

  After the welding of the ventral portion 10A and the dorsal portion 10C is completed, the exterior member 10 is separated from the strip members (the outer strip member 15 and the inner strip member 17) along the cut portion CL (S109). Separation from the belt-shaped member is performed using the cutter roll 74 of the cutting / welding mechanism 170. The cutter roll 74 is a rotating body that is disposed at a position facing the anvil roll 71 on the downstream side in the transport direction of the seal roll 73, and the circumferential surface thereof is along the axial direction of the cutter roll 74 (corresponding to the intersecting direction). A cutter block 741 is provided. And while the anvil roll 71 rotates, the cutter roll 74 rotates in the opposite direction, so that the anvil block 711 and the cutter block 741 are in a positional relationship that periodically faces each other. The cutter block 741 is provided with a cutter portion (not shown) along the axial direction (cross direction). When the cutter portion and the anvil block 711 of the anvil roll 71 face each other and come into contact with the base material, It is possible to cut the material in the cross direction. By cutting along the cut portion CL, the exterior member 10 (the outer sheet 5 and the inner sheet 7) formed into a pants shape is separated from the outer band member 15 and the inner band member 17. Then, the separated portion becomes the lateral end portion 10s of the diaper 1 (that is, the side region of the diaper 1).

  The separated exterior member 10 (the outer sheet 5 and the inner sheet 7) is conveyed while being adsorbed to the anvil roll 71, and is discharged as the diaper 1 to the outside of the diaper manufacturing apparatus 100. The diaper 1 is manufactured by the above process.

<About the arrangement of elastic members around the legs>
In the above-described elastic member cutting step (S107), the elastic members 8B, 8F, and 8L are bonded at the bonding region HMA due to an impact when the elastic members 8B, 8F, and 8L are cut back and contracted inward in the conveyance direction (that is, in the lateral center of the diaper 1) There is a case where the elastic member that has been peeled off is detached from the outer band member 15 and the inner band member 17. This phenomenon is also called “rubber loss”. When rubber omission occurs, stretchability is lost in the portion, and the fit when the diaper 1 is worn may be deteriorated. In particular, if the fit of the leg opening 1hL is poor when the diaper 1 is worn, a gap is likely to be formed between the wearer's leg and the leg opening 1hL, and excrement is generated outside the diaper 1 from the gap. Problems such as leakage may occur. Therefore, it is important to suppress separation (rubber omission) of the leg-around elastic member 8L in the pants-type diaper.

  In the diaper 1 of the present embodiment, a structure in which the leg elastic member 8L is arranged to intersect with the plurality of waist elastic members 8F in the elastic member arrangement step (S103), thereby easily preventing the leg elastic members 8L from being detached. It has become. FIG. 12 is a diagram for explaining the arrangement of the leg elastic members 8L and the waist elastic members 8F in the vicinity of the side region of the diaper 1 (that is, in the vicinity of the cut portion CL), and is an enlarged view of the region D in FIG. is there. This will be specifically described below with reference to FIG.

  In FIG. 12, three leg-hole elastic members 8La, 8Lb, and 8Lc are arranged along the leg-hole opening 1hL. Further, three waist elastic members 8Fa, 8Fb, 8Fc are arranged along the transport direction. Then, the leg-hole elastic members 8La to 8Lc are regions in the transport direction with respect to the welded portions sl formed at both ends in the transport direction of the diaper 1 (in the example of FIG. 12, further inside the transport direction than the adhesive region HMA). In the region, the waist elastic members 8Fa to 8Fc intersect with each other. Specifically, the leg elastic member 8La intersects with the waist elastic member 8Fa at c1, and intersects with the waist elastic member 8Fb at c2. That is, one leg elastic member 8L intersects with the two waist elastic members 8F and is joined to each other at two intersecting portions. Similarly, the leg elastic members 8Lb are joined to each other by intersecting with the three waist elastic members 8F at c3, c4, and c5, and the leg elastic members 8Lc are connected to the three waists at c6, c7, and c8. They are joined to each other by crossing the rotating elastic member 8F.

  In the elastic member cutting step (S107), when the leg elastic members 8La to 8Lc are cut at the cut portion CL, the leg elastic members 8La to 8Lc that are fixed in an extended state along the leg opening 1hL are: Shrink (cut back) from the cut portion CL toward the bonding region HMA. At this time, if the adhesive force in the adhesive region HMA is insufficient, the above-mentioned “rubber drop” occurs, and the leg-hole elastic members 8La to 8Lc try to contract further inward in the transport direction beyond the adhesive region HMA. . However, in the present embodiment, since the leg elastic member 8L and the waist elastic member 8F are joined to each other at the intersection, contraction of the leg elastic member 8L is suppressed by the waist elastic member 8F. For example, even if rubber loss occurs in the leg-surrounding elastic member 8La in FIG. 12, the leg-surrounding elastic member 8La is suppressed from being contracted by the waist elastic member 8Fb at c2, and further contracted by the waist elastic member 8Fa at c1. It is suppressed. Similarly, the contraction of the leg elastic member 8Lb is suppressed at three positions c5, c4, and c3, and the contraction of the leg elastic member 8Lc is suppressed at three positions c8, c7, and c6. As described above, in the present embodiment, the leg elastic member 8L intersects with a plurality of different waist elastic members 8F to suppress contraction, and the leg elastic member 8L is prevented from being detached from the diaper 1. At this time, as the number of crossing points increases, the leg elastic member 8L is less likely to be detached. In this embodiment, all the leg elastic members 8L (8La to 8Lc in FIG. 12) each have a plurality of waist elastics. Since the member 8F (8Fa to 8Fc in FIG. 12) intersects with the member 8F, the leg-around elastic member 8L is easily prevented from being detached.

  In particular, when an adhesive is applied to the elastic member itself, the amount of the adhesive increases at a location where the elastic members intersect with each other, so that a higher detachment suppression effect can be obtained. For example, in c1 where the leg elastic member 8La and the waist elastic member 8Fa intersect, the adhesive applied to the leg elastic member 8La and the adhesive applied to the waist elastic member 8Fa Since it exists, the amount of the adhesive is partially increased, and it becomes easy to firmly fix each other. Thereby, each elastic member can be made harder to separate.

  At the same time, the waist elastic member 8F can be hardly separated. For example, since the waist elastic member 8Fa intersects with the leg elastic member 8L at three locations c1, c3, and c6, contraction in the transport direction is suppressed at the intersection. Accordingly, it is easy to suppress the separation of the waist elastic member 8Fa.

  Further, by disposing the leg elastic member 8L closer to the skin side in the thickness direction than the waist elastic member 8F, it is possible to further suppress the separation of the leg elastic member 8L. When the diaper 1 is worn, the outer sheet 5 (outer belt-like member 15) arranged on the non-skin side comes into contact with the wearer's clothes (see FIG. 1B). Therefore, when the outer sheet 5, the leg elastic member 8 </ b> L, and the waist elastic member 8 </ b> F are arranged in this order from the non-skin side in the thickness direction, an impact generated when the outer sheet 5 rubs against the wearer's clothes. It is directly transmitted to the leg-surrounding elastic member 8L, and the leg-surrounding elastic member 8L may be easily peeled off from the adhesion region. On the other hand, even when the outer sheet 5, the waist elastic member 8F, and the leg elastic member 8L are arranged in order from the non-skin side in the thickness direction, even when the outer sheet 5 rubs against the wearer's clothes, Since the impact is transmitted to the leg-surrounding elastic member 8L via the waistline elastic member 8F, the leg-surrounding elastic member 8L can be made difficult to peel off by reducing the impact. That is, by disposing the leg-surrounding elastic member 8L as far as possible from the wearer's clothes (non-skin side), it is easy to suppress the leg-surrounding elastic member 8L from detaching from the diaper 1.

  Further, in the elastic member arranging step (S103), by changing the order in which the waist elastic member 8F and the leg elastic member 8L are arranged on the outer belt member 15 (or the inner belt member 17), the leg elastic member is changed. 8L separation can be easily suppressed. Specifically, after the leg elastic member 8L is arranged first with respect to the outer band member 15 (or the inner band member 17), the waist elastic member 8F is arranged so as to intersect the leg elastic member 8L. And glue. In this case, the leg-hole elastic member 8L is fixed in a state of being sandwiched between the outer belt-like member 15 (or the inner belt-like member 17) and the waist-hole elastic member 8F in the thickness direction. That is, the waist elastic member 8F fixes the leg elastic member 8L against the surface of the belt-like member. Thereafter, in the overlapping step (S104), the outer belt-shaped member 15 and the inner belt-shaped member 17 are stacked and bonded together, whereby the leg-hole elastic member 8L can be more firmly fixed. Thereby, it becomes easy to suppress that the leg-around elastic member 8L is detached from the diaper 1.

=== Other Embodiments ===
As mentioned above, although embodiment of this invention was described, said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. Further, the present invention can be changed or improved without departing from the gist thereof, and needless to say, the present invention includes equivalents thereof. For example, the following modifications are possible.

  In the above-described embodiment, the elastic member is disposed on the outer base material (for example, the outer belt member 15) to be transported, and then the inner base material (for example, the inner belt member 17) is overlapped and joined. Although the exterior member was formed, the procedure for forming the exterior member is not limited to this. For example, it may be a system in which the outer base material and the inner base material are transported in parallel so that they face each other, and an elastic member is disposed between them. Anyway, what is necessary is just the structure in which the exterior member by which the elastic member of the state extended | stretched so that it might be inserted | pinched between the 1st base material and the 2nd base material was arrange | positioned was formed.

  In the above-described embodiment, by using the cutting / welding mechanism 170, the elastic member cutting step (S107), the welding step (S108), and the substrate separating step (S109) are performed as a series of operations. The steps may be performed separately. For example, the anvil roll 71 of the cutting / welding mechanism 170 is divided into a first anvil roll and a second anvil roll, and the elastic member cutting step (S107) while the belt-like base material is conveyed by the first anvil roll. And the welding step (S108), and then the separation step (S109) is carried out while being conveyed by the second anvil roll, or only the welding step (S108) is carried out by the anvil roll, and the separation step. (S109) may be configured such that a separate cutting device is prepared and performed independently. Moreover, it is good also as another structure according to the installation place and conditions of a manufacturing line, and the order of each process implemented in a diaper manufacturing process may be changed partially.

  In the above-described embodiment, the elastic members 8B, 8F, and 8L arranged in the region where the welded portion sl is formed in the elastic member cutting step (S107) are cut (pre-cut), but are arranged in other portions. The elastic member may be cut.

  For example, the elastic members 8B, 8F, and 8L may be cut at the cutting point CL, and the waist elastic member 8F may be cut in the central region of the diaper 1 in the lateral direction. Specifically, a plurality of waist elastic members 8F may be cut at an intermediate portion between two cutting locations CL adjacent in the transport direction and between two adhesive areas HCM adjacent in the transport direction. . FIG. 13 is a diagram illustrating a region where the waist elastic member 8F is cut in the central portion of the diaper 1 in the horizontal direction. In FIG. 13, a portion where the waist elastic member 8 </ b> F is cut is indicated by a hatched portion as a region 1 </ b> A. The region 1A is a region having a portion overlapping with a region where the absorbent main body 3 is to be joined. When a shrinkage force in the conveying direction (lateral direction of the diaper 1) by the waist elastic member 8F acts on this region, the absorbent main body 3 also contracts in the lateral direction and the width becomes narrow. The area where the main body 3 covers the wearer's body is reduced. Then, the absorptive main body 3 may not be able to absorb excrement, and excrement may leak from the both ends of the lateral direction to the outside of the diaper 1. Therefore, at least a part of the plurality of waist elastic members 8F arranged in the region 1A of FIG. 13 is cut so that the stretch force by the waist elastic members 8F is less likely to act in the region. Thereby, the excessive shrinkage | contraction to the horizontal direction of the absorptive main body 3 can be suppressed, and it can suppress that excrement leaks from the horizontal direction both ends of the absorptive main body 3 at the time of wear of the diaper 1. FIG. When the waist elastic member 8F is cut in the region 1A of FIG. 13, each waist elastic member 8F may be cut at one place in the horizontal direction or divided at a plurality of positions in the horizontal direction. There may be. In other words, at least a part of the waist elastic member 8 </ b> F has one or more cut portions in the central region of the diaper 1 in the lateral direction.

  Moreover, in FIG. 13, the area | region 1A is set only to the ventral | abdominal side part 10A which is an abdominal side of the cross direction (vertical direction of the diaper 1). This is because the urine excreted on the ventral side when the diaper 1 is worn is more likely to spread laterally than the feces excreted on the dorsal side, so that the width of the abdominal side of the absorbent main body 3 is not contracted. This is to suppress urine leakage. In this way, by cutting the waist elastic member 8F on the ventral side of the diaper 1, it becomes easy to suppress leakage of urine from the absorbent main body 3 while keeping the fit of the waistline portion moderate. However, an area equivalent to the abdominal area 1A may be set in the dorsal side portion 10C, and the waist elastic member 8F on the dorsal side may be cut. In this case, shrinkage in the lateral direction of the absorbent main body 3 can be suppressed also on the back side. In addition to the waist elastic member 8F, a part of the leg elastic member 8L may be cut in the central region in the lateral direction. That is, the leg-hole elastic member 8L may be cut at a portion (crotch portion 10B) indicated by the region 1B in FIG. Thereby, while suppressing the shrinkage | contraction of the absorptive main body 3 in the crotch part 10B of the diaper 1, fit property can be adjusted.

  Note that the cutting of the elastic members 8B, 8F, and 8L at the cutting location CL and the cutting of the elastic members at other portions may be performed in the same process or in different processes.

  In the above-mentioned embodiment, although the nonwoven fabric was illustrated as a raw material of the outer sheet | seat 5 and the inner sheet | seat 7, these raw materials are not restricted to a nonwoven fabric at all. For example, a woven fabric or a sheet member other than the woven fabric may be used.

  In the above-described embodiment, the rubber thread is exemplified as the elastic member 8, but the present invention is not limited to this. For example, a belt-like rubber may be used as the elastic member 8, or a belt-like non-woven fabric having elasticity or a belt-like resin film having elasticity. For example, at least one of the waist elastic member 8F and the leg elastic member 8L may be formed of an elastic sheet member (band member) having a predetermined width. In this case, the area of the intersecting portion can be widened at locations where the waist elastic member 8F and the leg elastic member 8L intersect (for example, c1 to c8 in FIG. 12). As a result, since the waist elastic member 8F and the leg elastic member 8L are more firmly fixed, it is easier to suppress the leg elastic member 8L from being detached from the diaper 1.

1 diapers (absorbent articles),
1hB waistline opening, 1hL leg opening,
3 Absorbent body, 3b Back sheet, 3d Absorber, 3s Top sheet,
5 outer sheet, 7 inner sheet,
8B waist elastic member,
8F, 8Fa, 8Fb, 8Fc waist elastic member,
8L, 8La, 8Lb, 8Lc, 8L1, 8L2 leg elastic member,
10 exterior member,
10A ventral side, 10ae lateral end,
10B Inseam,
10C dorsal side, 10ce lateral end,
10e edge, 10eL edge, 10s lateral edge,
15 outer belt member, 17 inner belt member,
100 diaper manufacturing equipment,
101 transport mechanism, 101A transport roller, 101B support roller,
110 Adhesive region forming mechanism,
120 elastic member arrangement mechanism,
121 conveyance direction elastic member arrangement part, 122 cross direction elastic member arrangement part,
130 superposition mechanism,
140 Absorbent body joining mechanism,
150 folding mechanism,
170 Cutting / welding mechanism,
71 anvil roll, 711 anvil block,
72 pre-cut rolls, 721 cutter blocks,
73 seal roll, 731 seal block, 732 convex part, 732a rectangular part,
74 Cutter roll, 741 Cutter block,
CL cutting point,
HMA bonding area,
sl welding part

Claims (9)

A pants-type absorbent article having a longitudinal direction and a transverse direction intersecting the longitudinal direction,
An exterior member having an outer sheet positioned on the wearer's clothes side and an inner sheet superimposed on the outer sheet from the wearer's skin side, wherein the pants-type absorbent article is worn on the stomach side of the wearer An exterior member that is divided into an abdominal side that covers the back, a back side that covers the back side of the wearer, and a crotch that covers the crotch of the wearer,
An absorptive main body which is joined to the inner sheet over the wearer's skin side and absorbs excrement;
It is possible to join the outer sheet and the inner sheet along the lateral direction at the ventral part and the dorsal part, and to impart stretchability along the lateral direction to the exterior member. A plurality of waist elastic members,
In the ventral part and the dorsal part, it is joined between the outer sheet and the inner sheet along the leg-periphery opening of the pants-type absorbent article, and the leg-periphery opening with respect to the exterior member. A plurality of leg-around elastic members capable of providing stretchability along;
With
A welded portion for welding the back side portion and the ventral side portion of the exterior member is formed at both ends in the lateral direction,
The waist elastic member and the leg elastic member are joined so as to intersect each other in the region inside the lateral direction from the welded portion,
The leg-around elastic member is a continuous elastic member, and has a portion joined so as to intersect the waist elastic member, and a portion overlapping the welded portion in the lateral direction,
In the region corresponding to the welded portion in the lateral direction, there is no divided elastic member,
The underpants type absorbent article, wherein a stress of the leg-surrounding elastic member in the welded portion is smaller than a stress of the leg-surrounding elastic member in the laterally inner region from the welded portion. The pant-type absorbent article according to claim 1,
A pants-type absorbent article, wherein at least a part of the plurality of leg-around elastic members intersects with two or more different waist-around elastic members among the plurality of waist-around elastic members. The pant-type absorbent article according to claim 1,
All of the leg elastic members among the plurality of leg elastic members intersect with two or more different waist elastic members among the plurality of waist elastic members. Goods. The pant-type absorbent article according to any one of claims 1 to 3,
In the place where the leg elastic member and the waist elastic member intersect,
The pants-type absorbent article, wherein the leg elastic member is disposed at a position closer to the inner sheet than the waist elastic member. The pant-type absorbent article according to any one of claims 1 to 4,
The pants-type absorbent article, wherein the waist elastic member is joined to the leg elastic member after the leg elastic member is joined to the inner sheet or the outer sheet. . The pant-type absorbent article according to any one of claims 1 to 5,
An underpants-type absorbent article, wherein an adhesive is applied to at least one of the leg-surround elastic member and the waist elastic member. The pant-type absorbent article according to any one of claims 1 to 6,
At least one of the leg elastic member and the waist elastic member is a stretchable sheet member having a predetermined width. The pant-type absorbent article according to any one of claims 1 to 7,
A part of the waist elastic member has one or more cut portions at the central portion in the lateral direction. The pant-type absorbent article according to any one of claims 1 to 8,
At least one of the outer sheet and the inner sheet is formed with an adhesive region that joins the leg elastic member,
The pants-type absorbent article, wherein the adhesive region has a region that does not overlap the welded portion in the lateral direction.

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