Device for manufacturing stretchable sheet, method for manufacturing stretchable sheet, and wearable article

Abstract

In an apparatus for manufacturing a stretchable sheet, which performs a weakening process for cutting off a portion of an elastic member after forming a continuous stretchable sheet in which a sheet and the elastic member are integrated, a defect in which the joining of the sheet and the elastic member falls off is suppressed. This stretchable sheet manufacturing device is provided with: a forming device for forming a continuous stretchable sheet in which a pair of sheets and an elastic member disposed between the sheets are integrated, the forming device having an anvil roll (210) and an ultrasonic horn; the anvil roller has a first ridge portion (212a) and a second ridge portion (212b), and the ultrasonic horn forms a restriction portion by joining a pair of pieces between the first ridge portion and the ultrasonic horn, and forms a fixing portion by joining the elastic member and the pieces between the ultrasonic horn and the ultrasonic horn. The cutting portion cuts the elastic member of the continuous stretchable sheet body at the restriction portion. In the restricting portion, the sheet bodies and the elastic member are not joined, and the pair of sheet bodies restrict the contraction movement of the elastic member when cutting the elastic member.

Description

Technical Field

[0001] The present invention relates to a manufacturing device for a stretch sheet, a manufacturing method for a stretch sheet, and a wearing article provided with a stretch sheet manufactured using these manufacturing devices and manufacturing methods. Background Art

[0002] As disclosed in Patent Document 1 (Japanese Patent No. 6903810), there is known a wearing article having a stretchable waist member to be worn on the body of a wearer.

[0003] In the manufacture of the waist member of Patent Document 1 (Japanese Patent Publication No. 6903810), a pair of sheets and an elastic member disposed between the pair of sheets are integrated into a continuous stretch sheet body. In the continuous stretch sheet body, the pair of sheets and the elastic member are partially joined. In the manufacture of the waist member, the elastic member is weakened and partially cut in the continuous stretch sheet body for the purpose of joining other members (buckles, absorbent body, etc.) to the specified position of the waist member.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent No. 6903810 Summary of the invention

[0007] Problems to be solved by the invention

[0008] In the above-mentioned weakening treatment, the elastic member in the stretched state is cut. Therefore, during the weakening treatment, the elastic member contracts due to the restoring force. At this time, if the elongation of the elastic member before cutting is high, there is a possibility that the elastic member contracts suddenly due to the restoring force, so that the connection between the sheet body and the elastic member is disconnected, and the weakening treatment affects the area that does not need to be weakened.

[0009] The object of the present invention is to provide a manufacturing device and a manufacturing method for a stretchable sheet, in which a stretchable sheet continuous body is formed with an elastic member arranged between a pair of sheets and a pair of sheets, and even if the stretchable sheet continuous body is weakened by cutting the elastic member, the unfavorable situation of the sheet and the elastic member in the stretchable sheet continuous body being detached from each other can be suppressed. In addition, another object of the present invention is to provide a wearing article, which has a stretchable sheet manufactured by using the manufacturing device and the manufacturing method for the stretchable sheet.

[0010] Means for solving problems

[0011] The manufacturing device of the stretch sheet of the present invention is provided with a forming part and a cutting part. The forming part forms a stretch sheet continuous body which is integrated by a continuous first sheet, a continuous second sheet, and a continuous elastic member arranged between the first sheet and the second sheet. The cutting part cuts the elastic member of the stretch sheet continuous body. The forming part has a first joining member and a second joining member. The first joining member supports the first sheet, the elastic member and the second sheet which are transported in the transport direction. The second joining member sandwiches the first sheet, the elastic member and the second sheet between the first joining member and the second joining member. The first joining member has a first part and a second part on the opposite surface opposite to the second joining member. The second part is arranged adjacent to the first part in the transport direction of the first sheet, the elastic member and the second sheet which are supported and transported by the first joining member. The second joining member forms a limiting part in the stretch sheet continuous body by sandwiching the elastic member, the first sheet and the second sheet between the first part of the first joining member and joining the first sheet and the second sheet. The second joining member sandwiches the elastic member, the first sheet and the second sheet between the second part of the first joining member and joins the elastic member and at least one of the first sheet and the second sheet, thereby forming a fixing portion on the telescopic sheet continuous body. The cutting portion cuts off the elastic member of the telescopic sheet continuous body at the limiting portion of the telescopic sheet continuous body being transported. In the limiting portion of the telescopic sheet continuous body, the first sheet and the second sheet and the elastic member are non-joined. In addition, in the limiting portion of the telescopic sheet continuous body, the contraction movement of the elastic member cut by the cutting portion is limited by the first sheet and the second sheet.

[0012] In another embodiment of the present invention, a manufacturing device for a stretchable sheet body is provided with a forming unit, which forms a stretchable sheet body continuous body formed by integrating a continuous first sheet body, a continuous second sheet body, and a continuous elastic member arranged between the first sheet body and the second sheet body. The forming unit has a first joining member and a second joining member. The first joining member supports the first sheet body, the elastic member, and the second sheet body being transported in the conveying direction. The second joining member sandwiches the first sheet body, the elastic member, and the second sheet body between the first joining member. Two or more second joining members are arranged along the conveying direction. At least the second joining member on the most upstream side of the conveying direction sandwiches the first sheet body, the elastic member, and the second sheet body between the first joining member, and forms a temporary joining portion where the elastic member and at least one of the first sheet body and the second sheet body are temporarily joined. At least the second joining member on the most downstream side of the conveying direction sandwiches the temporary joining portion between the first joining member, and formally joins the elastic member and at least one of the first sheet body and the second sheet body, thereby forming a stretchable sheet body continuous body.

[0013] The manufacturing method of the stretch sheet of the present invention comprises a forming process and a cutting process. In the forming process, a continuous first sheet, a continuous second sheet, and a continuous elastic member arranged between the first sheet and the second sheet are integrated to form a stretch sheet continuous body. In the cutting process, the elastic member of the stretch sheet continuous body is cut. The forming process includes a conveying process, a first forming process, and a second forming process. In the conveying process, the first sheet, the second sheet, and the elastic member are conveyed in a conveying direction in a state where the elastic member is arranged between the first sheet and the second sheet. In the first forming process, the elastic member, the first sheet, and the second sheet are sandwiched between the first joining member and the second joining member that support the first sheet, the elastic member, and the second sheet conveyed in the conveying direction, and the elastic member is joined to at least one of the first sheet and the second sheet, thereby forming a fixing portion in the stretch sheet continuous body. In the second forming process, the elastic member, the first sheet, and the second sheet are sandwiched between the first joining member and the second joining member, and the first sheet and the second sheet are joined, thereby forming a limiting portion in the stretch sheet continuous body. In the cutting process, the elastic member of the stretch sheet body continuum is cut at the limiting portion of the stretch sheet body continuum. The limiting portion of the stretch sheet body continuum is formed at a position adjacent to the fixing portion of the stretch sheet body continuum. In the limiting portion of the stretch sheet body continuum, the first sheet body and the second sheet body and the elastic member are not joined. In the limiting portion of the stretch sheet body continuum, the contraction movement of the elastic member cut in the cutting process is limited by the first sheet body and the second sheet body.

[0014] In another method for manufacturing a stretch sheet of the present invention, there is provided: a forming step, in which a continuous first sheet, a continuous second sheet, and a continuous elastic member arranged between the first sheet and the second sheet are integrated to form a stretch sheet continuous body. The forming step includes a conveying step, a first forming step, and a second forming step. In the conveying step, the first sheet, the second sheet, and the elastic member are conveyed in the conveying direction in a state where the elastic member is arranged between the first sheet and the second sheet. In the first forming step, the elastic member, the first sheet, and the second sheet are sandwiched between a first joining member that supports the first sheet, the elastic member, and the second sheet conveyed in the conveying direction and an upstream second joining member, and a temporary joining portion is formed in which the elastic member and at least one of the first sheet and the second sheet are temporarily joined. In the second forming step, the temporary joining portion is sandwiched between the first joining member and the downstream second joining member arranged on the downstream side of the conveying direction of the upstream second joining member, and the elastic member and at least one of the first sheet and the second sheet are formally joined to form a stretch sheet continuous body.

[0015] The wearing article of the present invention has a stretchable sheet. The stretchable sheet includes at least a first sheet, a second sheet and an elastic member. The elastic member extends in a first direction and is arranged between the first sheet and the second sheet. The stretchable sheet includes a first portion and a second portion in the first direction. The elastic member does not exist in the first portion. In the second portion, the elastic member is joined to at least one of the first sheet and the second sheet. In the first portion, there is a portion in which, in a cross-sectional view cut in a direction orthogonal to the first direction, the maximum gap between the space between the first sheet and the second sheet connected to the space in which the elastic member is arranged in the third portion is smaller than the diameter of the elastic member in a state where no tension is applied.

[0016] Effects of the Invention

[0017] In the manufacturing apparatus of the stretch sheet of the present invention, it is possible to suppress the occurrence of a problem in which the sheet and the elastic member in the stretch sheet become disconnected during the weakening process of cutting the elastic member.

[0018] In the manufacturing device of the stretch sheet body of other examples of the present invention, it is possible to prevent the elastic member from being cut off when the elastic member is joined to at least one of the first sheet body and the second sheet body, and the elastic member is pulled back to the upstream side due to the restoring force, thereby preventing the occurrence of an undesirable situation in which the manufacturing device of the stretch sheet body needs to be stopped in order to reconfigure the elastic member.

[0019] In the method for manufacturing a stretch sheet of the present invention, it is possible to suppress the occurrence of a problem in which the sheet and the elastic member in the stretch sheet become disconnected during the weakening process of cutting the elastic member.

[0020] In the manufacturing method of the stretch sheet body of other examples of the present invention, it is possible to prevent the elastic member from being cut off when the elastic member is joined to at least one of the first sheet body and the second sheet body, and the elastic member is pulled back to the upstream side due to the restoring force, thereby preventing the occurrence of an undesirable situation in which the manufacturing device of the stretch sheet body needs to be stopped in order to reconfigure the elastic member.

[0021] In the wearing article of the present invention, it is possible to suppress the occurrence of a problem in which the elastic member and the sheet piece are fixed and fall off in the second portion of the stretch sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a front view showing a refastenable wearing article of one embodiment of a wearing article having a stretch sheet according to one embodiment of the present invention, in a state when being worn.

[0023] Figure 2 Yes means Figure 1 A rear view of a wearing article in a worn state.

[0024] Figure 3 It means expansion Figure 1 A state of a worn article and an expanded view of the worn article.

[0025] Figure 4 yes Figure 1 An exploded perspective view of a wearing article.

[0026] Figure 5 It means manufacturing Figure 1 A schematic diagram of a manufacturing apparatus for a wearing article including a manufacturing apparatus for a stretch sheet according to an embodiment of the present invention.

[0027] Figure 6 It is a general statement Figure 5 A diagram of a device for forming a continuous stretch sheet body in a manufacturing device for a wearing article.

[0028] Figure 7 Yes Figure 6 A schematic diagram of a forming apparatus in which a portion of the outer peripheral surface of an anvil roller is unfolded into a plane.

[0029] Figure 8 Indicates that the radial direction of the anvil roller is observed by Figure 7 A diagram of a second groove forming portion surrounded by a circle α in FIG. 1 , and a sectional view of the second groove forming portion at an arrow X1 - X1 in the diagram.

[0030] Fig. 9 It indicates that the anvil roller is viewed along its circumference. Figure 7 A diagram of a first groove forming portion surrounded by a circle β in FIG. 1 , and a sectional view of the first groove forming portion at an arrow X2 - X2 in the diagram.

[0031] Fig.10 It indicates that the anvil roller is viewed along its circumference. Figure 7 A diagram of a first groove forming portion surrounded by an ellipse γ in FIG. 1 , and a cross-sectional view of the first groove forming portion at arrow X3 - X3 in the diagram.

[0032] Fig.11 is a schematic representation of Figure 5 FIG. 1 is a diagram of a stretchable sheet continuum formed by a stretchable sheet manufacturing device.

[0033] Fig.12 It means that the continuous body of the stretch sheet is cut in a direction perpendicular to the conveying direction (the waist direction when formed into a wearing article) of the continuous body of the stretch sheet. Fig.11 A partial cross-sectional view of the state of the area shown by B3.

[0034] Fig.13 It means that the continuous body of the stretch sheet is cut in a direction perpendicular to the conveying direction (the waist direction when formed into a wearing article) of the continuous body of the stretch sheet. Fig.11A partial cross-sectional view of the state of the area shown by B1.

[0035] Fig.14 This is a diagram schematically showing a forming device of a stretch sheet continuous body of a stretch sheet manufacturing device according to Modification A.

[0036] Fig.15 This is a diagram schematically showing a stretch sheet continuous body forming device of a stretch sheet manufacturing device according to Modification C. DETAILED DESCRIPTION

[0037] Hereinafter, embodiments of a stretch sheet manufacturing apparatus, a stretch sheet manufacturing method, and a wearing article including a stretch sheet according to the present invention will be described with reference to the drawings.

[0038] In addition, the following embodiments are only examples of the present invention and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that various changes may be made to the following embodiments without departing from the spirit and scope of the present invention as described in the claims.

[0039] (1) Overview of clothing items

[0040] Reference Figure 1 to Figure 4 , an overview of a wearing article using the stretch sheet of the present invention will be described. Figure 1 This is a front view showing the refastenable wearing article 1 in a state when being worn. Figure 2 It is a rear view showing the wearing article 1 in a state when being worn. Figure 3 It is a development view of the wearing article 1 showing a state where the wearing article 1 is developed. Figure 4 It is an exploded perspective view of the wearing article 1.

[0041] The wearing article 1 is a wearing article having a stretchable waist member 10 which is worn on the body of a wearer and which uses a stretchable sheet manufactured by a stretchable sheet manufacturing device 100 and a stretchable sheet manufacturing method according to an embodiment of the present invention. The waist member 10 uses a stretchable sheet having an elastic member arranged between a pair of sheets. In particular, the wearing article 1 is a wearing article having a waist member 10 using a stretchable sheet having a portion of the elastic member weakened (the elastic member is partially cut).

[0042] The stretch sheet of the present invention is widely used in waist members, cuff members, hem members, etc. of disposable diapers, disposable medical gowns, etc., and its use is not limited.

[0043] In this embodiment, a wearing article 1 as a refastenable diaper is used as an example to describe a wearing article having a stretch sheet of the present invention. In this chapter, the structure / composition of the wearing article 1 is briefly described, and the characteristic structure / composition of the stretch sheet of the present invention is described later. In addition, the wearing article 1 of this embodiment has the same structure / composition as the wearing article disclosed in Patent Document 1 (Japanese Patent No. 6903810) in many parts. Therefore, the detailed description of the wearing article 1 is omitted here unless it is particularly necessary.

[0044] In the following description, the terms waist direction and waist-orthogonal direction are sometimes used to describe directions or positions. The waist direction refers to the direction along the torso of the wearer when the wearer wears the garment 1. The waist-orthogonal direction refers to the direction perpendicular to the waist direction, that is, the direction along the body length direction (height direction) of the wearer when the wearer wears the garment 1.

[0045] like Figure 1 to Figure 4 As shown, the refastenable wearing article 1 of the present embodiment mainly comprises a waist member 10 arranged on the waist of the wearer, and an absorbent body 20 arranged from the back of the wearer through the crotch to the front abdomen.

[0046] like Figure 3 As shown, the waist member 10 includes a waist main body 16 to be arranged on the waist of the wearer and a male fastener 12 attached to the waist main body 16 .

[0047] The waist main body 16 is a member that is worn on the waist of the wearer and can be stretched along the waist direction. The waist main body 16 uses the stretch sheet of the present invention. Figure 4 As shown, the waist body 16 mainly includes: an inner sheet 14, an outer sheet 15, and an elastic member 11 disposed between the inner sheet 14 and the outer sheet 15. One of the inner sheet 14 and the outer sheet 15 is an example of a first sheet piece in the present invention, and the other of the inner sheet 14 and the outer sheet 15 is an example of a second sheet piece in the present invention.

[0048] The inner sheet 14 is, for example, a nonwoven fabric sheet. The inner sheet 14 is a belt-shaped member extending in the waist direction. The inner sheet 14 has an inner surface 16i of the waist main body 16 (see Figure 4 ), the inner surface 16i faces the skin side of the wearer when the wearer wears the wearing article 1. One end of the absorbent body 20 is joined to a portion of the inner sheet 14 corresponding to the absorbent body joining portion 10b described later (a portion of the inner surface 16i of the waist body 16 corresponding to the absorbent body joining portion 10b). In addition, the male hook and loop 12 is joined to a male hook and loop joining portion 10d described later of the inner sheet 14 (a portion of the inner surface 16i of the waist body 16 corresponding to the male hook and loop joining portion 10d).

[0049] The outer sheet 15 is, for example, a nonwoven fabric sheet. The outer sheet 15 is a belt-shaped member extending in the waist direction of the wearing article 1. The outer sheet 15 has an outer surface 16o of the waist main body 16 (see Figure 4 ), the outer surface 16o is arranged on the side opposite to the inner surface 16i of the waist body 16, and when the wearer wears the wearing article 1, the outer surface 16o faces outward (the side opposite to the wearer's skin).

[0050] like Figure 4 As shown, the elastic member 11 is an elastic member that is arranged between the inner sheet 14 and the outer sheet 15 and is stretched in the waist direction. In the manufactured wearing article 1, the elastic member 11 is in an extended state and has a restoring force acting in the direction of contraction in the waist direction. By providing the waist main body 16 with the elastic member 11, when the wearer wears the wearing article 1, the waist main body 16 and the wearer's body can be closely attached by the restoring force of the elastic member 11. The elastic member 11 is formed of a material such as polyurethane, natural rubber, thermoplastic resin, etc. Although not limited, in the present embodiment, the shape of the elastic member 11 is linear. In the present embodiment, a plurality of linear elastic members 11 extending in the waist direction are arranged between the inner sheet 14 and the outer sheet 15 (see Figure 1 to Figure 4 ).

[0051] The elastic member 11 is partially joined to at least one of the inner sheet 14 and the outer sheet 15. Figure 4 As shown in FIG. 1 , the elastic member 11 is a portion facing the inner sheet 14 and is disposed in a region of the waist main body 16 excluding the absorbent body joint 10b and the end 10c described later. Figure 3 as well as Figure 4 As shown, the elastic member 11 is cut by a weakening process in the manufacturing process of the wearing article 1 at the absorbent body joint portion 10b and the end portion 10c of the waist main body 16 described later.

[0052] like Figure 3 As shown, the waist main body 16 in which the inner sheet 14, the outer sheet 15, and the elastic member 11 are integrated includes an absorber joint portion 10b and two side portions 10a arranged on both sides of the absorber joint portion 10b in the waist direction of the wearer.

[0053] The absorber joint 10b is a portion joined to the absorber 20. The absorber joint 10b is the center of the waist main body 16 in the waist direction and is located below the waist main body 16 in the waist-orthogonal direction (located on the lower side when the wearer wears the garment 1 standing upright).

[0054] In the absorbent body joint 10b, the weakening treatment of the elastic member 11 is performed as described above and the elastic member 11 does not exist. Alternatively, in the absorbent body joint 10b, the result of the weakening treatment is that the elastic force of the elastic member 11 does not substantially work. On the other hand, the elastic member 11 is arranged above the waist main body 16 in the waist-orthogonal direction of the absorbent body joint 10b (above the absorbent body joint 10b when the wearer is standing upright wearing the wearing article 1). Therefore, above the waist main body 16 in the waist-orthogonal direction of the absorbent body joint 10b, when the wearer wears the wearing article 1, the waist main body 16 can be made to fit closely to the wearer's body by the elastic force of the elastic member 11.

[0055] The two side portions 10a of the waist main body 16 are portions extending from the position where the absorbent body joint portion 10b exists in the waist direction, toward the direction away from the absorbent body joint portion 10b, toward the end 10c of the side portion 10a. The two end portions 10c are the two end portions of the waist main body 16 in the waist direction. The side portion 10a is a member that covers the left and right sides and the front of the wearer's body when the wearer wears the wearing article 1.

[0056] The two ends 10c of the waist body 16 are respectively connected to the male buckle 12, and the male buckle 12 is used in combination with the female buckle 22 described later to function as a face buckle. More specifically, the male buckle 12 is connected to the end 10c of the waist body 16, that is, the inner surface 16i (the surface of the inner sheet 14 facing the skin side of the wearer) of the waist body 16. The part of the waist body 16 that is connected to the male buckle 12 is called the male buckle connection part 10d.

[0057] The absorbent body 20 is a member for absorbing body fluids such as urine, etc. The absorbent body 20 mainly includes a core body 25 , a surface sheet 24 , a back sheet 26 , female fasteners 22 , leg gathers 31 , and three-dimensional gathers 40 .

[0058] The core 25 includes a nonwoven fabric carrying a highly water-absorbent polymer, and has a function of absorbing body fluids such as urine.

[0059] The top sheet 24 is a member provided on the skin side of the wearer with respect to the core body 25. The top sheet 24 is a sheet-like member composed of one nonwoven fabric, or a sheet-like member formed by overlapping a plurality of nonwoven fabrics in a layered form.

[0060] The inner sheet 26 is a sheet-like member arranged on the side opposite to the skin side of the wearer (outer surface side) with respect to the core 25 in a manner of sandwiching the core 25 between the surface sheet 24. The inner sheet 26 includes a liquid-impermeable sheet 26a made of a nonwoven fabric such as polypropylene or polyethylene and an outer sheet 26b covering the outside thereof. The liquid-impermeable sheet 26a is a member having waterproof properties and inhibiting the passage of body fluids such as urine. A female buckle 22 is installed on the outer surface of the outer sheet 26b (the surface opposite to the skin side of the outer sheet 26b of the wearer), and the female buckle 22 is used in combination with the male buckle 12 of the waist body 16 to function as a face buckle.

[0061] The leg gathers 31 are elastic members arranged at positions corresponding to the thigh roots when the wearer wears the wearing article 1. Figure 3 In the unfolded state as shown, the leg gathers 31 are respectively arranged along the two edges of the liquid-impermeable sheet 26a in the waist direction and in the direction perpendicular to the waist, over the substantially entire liquid-impermeable sheet 26a. Figure 3 In the unfolded state as shown, the leg gathers 31 are arranged between the liquid-impermeable sheet 26a and the top sheet 24 in an extended state in the direction perpendicular to the waistline.

[0062] like Figure 4 As shown, the three-dimensional gathers 40 are provided on the surface facing the skin side of the surface sheet 24. When the wearer wears the garment 1, the three-dimensional gathers 40 and the back, crotch, front abdomen, etc. of the wearer are elastically adhered to each other, thereby preventing body fluids such as urine from flowing out to the outside of the garment 1.

[0063] like Figure 3 as well as Figure 4 As shown in FIG. 1 , the absorbent body 20 is joined to the absorbent body joint 10b of the waist main body 16. When the wearing article 1 is unfolded (before being assembled for wearing), as shown in FIG. Figure 3 As shown, the absorbent body 20 extends from the absorbent body joint 10b in the direction perpendicular to the waist and away from the waist main body 16. When the wearer wears the wearing article 1, the absorbent body 20 is arranged from the back of the wearer through the crotch to the front abdomen. The female hook and loop 22 is attached to the outer surface of the absorbent body 20 on the opposite side of the wearer when the wearer wears the wearing article 1, and on the end of the absorbent body 20 on the far side relative to the absorbent body joint 10b in the direction perpendicular to the waist.

[0064] In the assembled state (the stage of wearing the wearing article), the wearing article 1 is deformed in the following manner: the absorbent body 20 is folded back in such a manner that the surface sheet 24 is arranged on the inside, and the surface of at least the end 10c of the side portion 10a of the waist body 16 on the side where the male buckle 12 is arranged overlaps with the outer sheet 26b of the back sheet 26 of the absorbent body 20. Figure 1 as well as Figure 2 As shown, the male hook and loop fastener 12 of the waist main body 16 is engaged with the female hook and loop fastener 22 of the outer sheet 26b attached to the absorbent body 20. In the state where the male hook and loop fastener 12 and the female hook and loop fastener 22 are engaged, the wearer of the wearing article 1 pushes the waist member 10 of the refastenable wearing article 1 assembled into the shape of underwear, inserts the feet, and puts on the wearing article 1 like underwear.

[0065] (2) Overview of the manufacturing device and method of the stretchable sheet

[0066] Reference Figure 5 , a manufacturing apparatus 1000 for a wearing article 1 including a manufacturing apparatus 100 for a stretch sheet, and a manufacturing method for the wearing article 1 including a manufacturing process of a stretch sheet (stretch sheet continuous body) are described.

[0067] The stretch sheet manufacturing device 100 constituting a part of the manufacturing device 1000 of the wearing article 1 is a device for forming a stretch sheet continuous body 116 described later. The stretch sheet manufacturing device 100 mainly includes a forming device 200 and a cutting device 300 described later. The characteristic composition and method of the stretch sheet manufacturing device 100 of this embodiment will be described later.

[0068] In addition, the manufacturing apparatus 1000 of the wearing article 1 and the manufacturing method of the wearing article 1 are similar to the manufacturing apparatus and the manufacturing method of the wearing article disclosed in Patent Document 1 (Japanese Patent No. 6903810) in many parts. Therefore, the detailed description of the manufacturing apparatus 1000 of the wearing article 1 and the manufacturing method of the wearing article 1 is omitted here unless it is particularly necessary. In addition, in the following description, the conveying direction of the sheet body etc. in each process is called the MD direction, and the direction orthogonal to it is called the CD direction.

[0069] Figure 5 The steps P1 and P2 are examples of steps for manufacturing a continuous stretch sheet body 116 in which a plurality of waist main bodies 16 are continuous.

[0070] <Process P1>

[0071] like Figure 5 As shown, in step P1, a continuous body 115 (an example of a second sheet) of a plurality of outer sheets 15 is conveyed in the MD direction, and a continuous elastic member 11 in a stretched state is arranged linearly along the MD direction on the continuous body 115. On the continuous body 115, a plurality of continuous elastic members 11 are arranged at intervals in a direction orthogonal to the waist (CD direction). Figure 5As shown, in step P1 , a continuous body 114 (an example of a first sheet body) in which a plurality of inner sheets 14 are continuous is conveyed in the MD direction, and the continuous body 114 is arranged on a continuous body 115 so as to cover the elastic member 11 from above.

[0072] In this way, when the elastic member 11 is arranged between the continuum 115 and the continuum 114 in the stretched state, the forming device 200 as an example of the forming part joins the elastic member 11 to at least one of the continuum 115 and the continuum 114. Here, the forming device 200 joins the elastic member 11 to at least one of the continuum 115 and the continuum 114 by ultrasonic welding. In addition, the joining method used by the forming device 200 may also be welding based on heat sealing. In addition, hereinafter, the continuum in which the continuum 114, the elastic member 11, and the continuum 115 are stacked and integrated by joining is referred to as the stretch sheet body continuum 116.

[0073] The forming device 200 for joining the continuous body 115 and the continuous body 114 and the elastic member 11 will be described later.

[0074] <Process P2>

[0075] In step P2, the elastic member 11 is subjected to a weakening treatment at a position of the stretch sheet body continuous body 116 corresponding to the absorbent body joint portion 10b where the absorbent body 20 is arranged and the male hook-and-loop joint portion 10d where the male hook-and-loop fastener 12 is arranged. The weakening treatment here is a treatment of cutting the elastic member 11 of the stretch sheet body continuous body 116 by the cutting device 300. In addition, the cutting device 300 may be a pleating cutter that cuts the elastic member 11 with a blade, or an embossing roller (hot embossing) device that melts the elastic member 11 by heating and then cuts it.

[0076] <Process P3 to Process P7>

[0077] Steps P3 to P7 are examples of steps for manufacturing the absorbent body 20 .

[0078] In step P3, a top sheet semi-finished product is formed by combining a continuous body of top sheets 24 in which a plurality of top sheets 24 are continuous and a continuous body of three-dimensional gathers 40 in which a plurality of three-dimensional gathers 40 are continuous.

[0079] In step P4 , a continuum of core bodies 25 in which a plurality of core bodies 25 are continuous is formed, and the core body 25 is manufactured using the continuum of core bodies 25 .

[0080] In step P5, a back sheet semi-finished product is formed in which the continuous body of the back sheet 26 and the continuous body of the leg gathers 31 are joined together.

[0081] In step P6, an absorbent body semi-finished product is formed by combining the surface sheet semi-finished product formed in step P3, the core body 25 formed in step P4, and the back sheet semi-finished product formed in step P5.

[0082] In step P7, the absorbent body semi-finished product formed in step P6 is cut to produce individual absorbent bodies 20.

[0083] <Process P8 to Process P11>

[0084] Steps P8 to P11 are examples of steps for assembling the wearing article 1 .

[0085] In step P8, one end of the absorbent body 20 (the end on the side opposite to the female hook and loop 22) reversed by 90 degrees manufactured in step P7 is arranged on the absorbent body joint 10b of each waist body 16 in the stretch sheet body continuous body 116 manufactured in step P2. The absorbent body 20 is joined to the position corresponding to the absorbent body joint 10b of the inner surface 16i of each waist body 16. The joining means may be bonding based on a hot melt adhesive, heat welding based on a heat sealing device, or ultrasonic welding based on an ultrasonic welding device.

[0086] In step P9, the portion of the continuous body 115 of the outer sheet 15 of the stretch sheet continuous body 116 where the elastic member 11 is not arranged and is not covered by the continuous body 114 of the inner sheet 14 (referred to as the extended portion 15c, see Figure 4 ) is folded back. Then, the extension portion 15c is joined to each absorbent body 20 while covering the end portion on the absorbent body joint portion 10b of each absorbent body 20 (the end portion joined to the stretch sheet body continuous body 116). In addition, in step P9, the male hook and loop 12 is joined to the portion corresponding to the male hook and loop joint portion 10d of each waist body 16. In addition, the joining means here can be either bonding based on hot melt adhesive, or welding based on heat sealing or ultrasonic welding.

[0087] In step P10 , the absorbent body 20 is folded in half along the CD direction by the folding device 54 .

[0088] In step P11, the stretch sheet continuous body 116 is cut in the CD direction by the cutter 56 at the middle position of the adjacent absorbers 20 and at the middle position in the MD direction of the male fastener 12. Thus, the stretch sheet continuous body 116 and the plurality of absorbers 20 are separated into each waistline body 16 and each absorber 20 joined thereto.

[0089] In step P12, the side portions 10a arranged on both sides in the MD direction of the waist member 10 are folded back toward the absorbent body joint portion 10b of the waist member 10 so that the male hook and loop 12 at both end portions 10c and the outer surface of the absorbent body 20 face each other. Next, the male hook and loop 12 of the waist member 10 and the female hook and loop 22 of the absorbent body 20 are engaged.

[0090] (3) Forming device of manufacturing device of stretchable sheet body

[0091] Reference Figure 6 to Figure 13 , the forming device 200 of the manufacturing device 100 of the stretch sheet body will be described. Figure 6 This is a diagram schematically showing the forming device 200. Figure 7 It is a schematic diagram showing a part of the outer peripheral surface 211 of the anvil roller 210 of the forming apparatus 200 developed in a planar shape. Figure 8 The anvil roller 210 is viewed along the radial direction. Figure 7 2 is a diagram of the second groove forming portion 216 (a portion of the second protrusion 212 b ) surrounded by a circle α in FIG. 1 , and a cross-sectional view of the second groove forming portion 216 taken along arrow X1 - X1 in the figure.

[0092] Fig. 9 The anvil roller 210 is viewed along the radial direction. Figure 7 2 and 3. A diagram of the first groove forming portion 214 (a portion of the first width direction protrusion 212aa) surrounded by a circle β in FIG. 2 and a cross-sectional view of the first groove forming portion 214 at an arrow X2-X2 in the figure. Fig.10 The anvil roller 210 is viewed along the radial direction. Figure 7 FIG. 214 is a diagram of the first groove forming portion 215 (a portion of the first circumferential protrusion 212ab) surrounded by the ellipse γ in FIG. 215 , and a cross-sectional view of the first groove forming portion 215 at the arrow X3-X3 in the figure. Fig.10 In the drawing of the first groove forming portion 215 , the shortened length of the first groove forming portion 215 in the circumferential direction R of the anvil roller 210 is depicted. Fig.11 1 is a diagram schematically showing a stretch sheet continuous body 116 formed by the stretch sheet manufacturing device 100 (forming device 200 and cutting device 300). Fig.12 The stretch sheet continuous body 116 is cut in a direction perpendicular to the conveying direction D (the waist direction when the stretch sheet continuous body 116 is formed into the wearing article 1). Fig.11 A partial cross-sectional view of the state of the area shown in B3 (third area B3). Fig.13 The stretch sheet continuous body 116 is cut in a direction perpendicular to the conveying direction D (the waist direction when the stretch sheet continuous body 116 is formed into the wearing article 1). Fig.11 A partial cross-sectional view of the state of the region indicated by B1 (first region B1). Figure 6 to Figure 13 The drawings are for explanation purposes only and do not accurately represent the actual dimensions and shapes of the components. Figure 6 to Figure 13 In order to avoid complicating the drawings, some of the reference numerals are omitted.

[0093] The forming device 200 is an example of a forming portion, and the forming device 200 forms a stretchable sheet body continuum 116 which is integrated by a continuum 114, a continuum 115 and an elastic component 11, wherein the continuum 114 is an example of a continuous first sheet body, the continuum 115 is an example of a continuous second sheet body, and the elastic component 11 is a continuous component arranged between the continuum 114 and the continuum 115.

[0094] The forming device 200 mainly includes an anvil roller 210, an introduction device 220 and an ultrasonic horn 230 (see Figure 6 ), the anvil roller 210 is an example of a first bonding member, and the ultrasonic horn 230 is an example of a second bonding member. The ultrasonic horn 230 is vibrated by ultrasonic waves generated by an oscillator (not shown).

[0095] The anvil roller 210 is supported in the conveying direction D (refer to Figure 6 Components of the continuum 114, the elastic component 11 and the continuum 115 being transported (as shown by the arrows in the figure).

[0096] The introduction device 220 guides the elastic member 11 and introduces it into the anvil roller 210. In addition, the continuous body 115 is introduced into the anvil roller 210 at a position upstream of the introduction position of the elastic member 11 in the rotation direction of the anvil roller 210. Furthermore, the continuous body 114 is introduced into the anvil roller 210 at a position downstream of the introduction position of the elastic member 11 in the rotation direction of the anvil roller 210. The anvil roller 210 conveys the pair of continuous bodies 115, 114 and the elastic member 11 in a state in which the elastic member 11 is arranged between the pair of continuous bodies 115, 114.

[0097] The ultrasonic horn 230 sandwiches the continuum 114, the elastic member 11, and the continuum 115 between the anvil roller 210. The ultrasonic horn 230 and the anvil roller 210 cooperate to partially join the pair of continuums 115 and 114 to each other (ultrasonic welding). In addition, the ultrasonic horn 230 and the anvil roller 210 cooperate to partially join at least one of the pair of continuums 115 and 114 to the elastic member 11, so that the elastic member 11 is retained on the pair of continuums 115 and 114. In addition, the second joining member of the present invention is not limited to the ultrasonic horn 230, and may also be a roller with a built-in heater for heat-melting the continuums 115 and 114 to each other or the continuums 115 and 114 to the elastic member 11.

[0098] The anvil roller 210 will be described in more detail.

[0099] like Figure 6 as well as Figure 7 As shown, the anvil roller 210 is a cylindrical member that rotates around an axis, and the anvil roller 210 has a plurality of protrusions 212 protruding radially outward from the anvil roller 210 on the outer peripheral surface 211. The outer peripheral surface 211 of the anvil roller 210 is an example of the opposite surface of the anvil roller 210 as the first bonding member that faces the ultrasonic horn 230 as the second bonding member. The protrusion 212 has a first surface 212f (see Figure 6 ), the first surface 212f is opposite to the ultrasonic horn 230 that performs ultrasonic vibration. Figure 8 to Figure 10 As shown, the first surface 212f protrudes from the outer peripheral surface 211 of the anvil roller 210 to the radially outer side of the anvil roller 210 by a certain height h. The first surface 212f of the protruding strip 212 and the ultrasonic horn 230 that performs ultrasonic vibration sandwich the continuum 115 and the continuum 114 therebetween and pressurize them, thereby ultrasonically welding the continuum 115 and the continuum 114. In addition, even if the continuum 115 and the continuum 114 are conveyed between the anvil roller 210 and the ultrasonic horn 230, these components are not in a pressurized state between the ultrasonic horn 230 and the first surface 212f of the protruding strip 212, and the continuum 115 and the continuum 114 are not ultrasonically welded.

[0100] like Figure 7 As shown, the protrusions 212 are arranged to be separated from each other in the circumferential direction R of the anvil roller 210. One or more grooves G extending in the circumferential direction R of the anvil roller 210 are formed on the first surface 212f of each protrusion 212. In other words, the grooves G extend along the conveying direction D of the continuum 114, the elastic member 11, and the continuum 115 supported and conveyed by the anvil roller 210. The grooves G are grooves in which the continuum 114, the elastic member 11, and the continuum 115 supported and conveyed by the anvil roller 210 and the elastic member 11 are embedded. Figure 7 As shown, the grooves G provided on the first surface 212f of each protrusion 212 and the grooves G provided on the protrusion 212 adjacent to each other along the circumferential direction R of the anvil roller 210 are arranged in a straight line. Therefore, each elastic member 11 introduced into the anvil roller 210 by the introduction device 220 is guided to the grooves G arranged in a straight line and conveyed along the circumferential direction R of the anvil roller 210.

[0101] The protrusion 212 includes a first protrusion 212a and a second protrusion 212b. The first protrusion 212a is an example of a first part in the claims, and the second protrusion 212b is an example of a second part in the claims. The first protrusion 212a includes a first widthwise protrusion 212aa and a first circumferential protrusion 212ab.

[0102] The second protrusion 212b is provided in the region where the first protrusion 212a is not provided in the circumferential direction R of the anvil roller 210. Specifically, in the circumferential direction R of the anvil roller 210, the second protrusion 212b is arranged adjacent to the region where the first protrusion 212a is provided on both sides of the region where the first protrusion 212a is provided (see Figure 7 In other words, in the conveying direction D of the continuum 114, the elastic member 11, and the continuum 115 supported and conveyed by the anvil roller 210, the second protrusion 212b and the upstream and downstream sides of the first protrusion 212a are arranged adjacent to each other (see Figure 7 ).

[0103] like Figure 7 As shown in FIG. 1 , the second protrusion 212b, which is a part of the protrusion 212, extends along the width direction S of the anvil roller 210 (the CD direction orthogonal to the MD direction in which the continuum 114, 115 and the elastic member 11 are conveyed). In other words, the second protrusion 212b extends along a generatrix parallel to the axial direction of the anvil roller 210. The second protrusion 212b is adjacent to the upstream and downstream sides of the first protrusion 212a in the conveying direction D, and two of each are arranged (see FIG. 1 ). Figure 7 However, the number of the second protrusions 212b is an example, and the second protrusions 212b may be adjacent to the upstream and downstream sides of the first protrusions 212a in the conveying direction D, and one or more second protrusions 212b may be respectively arranged. Figure 7 As shown, a plurality of grooves G are formed on the second protrusion portion 212 b extending in the width direction S. The plurality of grooves G are separated from each other in the width direction S of the anvil roller 210 and extend in the circumferential direction R of the anvil roller 210 .

[0104] like Figure 7 As shown, the first circumferential protrusion 212ab as a part of the protrusion 212 extends along the circumferential direction R (MD direction in which the continuum 114, 115 and the elastic member 11 are conveyed) of the anvil roller 210. The first circumferential protrusion 212ab extending in the circumferential direction R is formed with a groove G extending in the circumferential direction R of the anvil roller 210. In addition, the first circumferential protrusion 212ab may be divided into a plurality of parts in the circumferential direction R of the anvil roller 210 instead of extending long in the circumferential direction R of the anvil roller 210.

[0105] In addition, if Figure 7As shown, the first width-direction protrusion 212aa, which is a part of the protrusion 212, extends along the width direction S of the anvil roller 210 (the CD direction orthogonal to the MD direction in which the continuum 114, 115 and the elastic member 11 are conveyed). In other words, the first width-direction protrusion 212aa extends along a generatrix parallel to the axial direction of the anvil roller 210. The first width-direction protrusion 212aa is adjacent to the upstream and downstream sides of the first circumferential protrusion 212ab in the conveying direction D (between the first circumferential protrusion 212ab and the second protrusion 212b), and one is arranged on each side (refer to Figure 7 ). However, the number of the first width-direction protrusions 212aa is an example, and the first width-direction protrusions 212aa may be adjacent to the upstream and downstream sides of the conveying direction D and the first circumferential protrusions 212ab, and two or more of them may be arranged respectively. In other examples, the first width-direction protrusions 212aa may be omitted. A plurality of grooves G are formed on the first width-direction protrusions 212aa extending along the width direction S, and the plurality of grooves G are separated from each other in the width direction S of the anvil roller 210 and extend in the circumferential direction R of the anvil roller 210.

[0106] In addition, if Figure 7 As shown, the grooves G provided on the first protrusion 212a and the second protrusion 212b and the grooves G provided on the first protrusion 212a or the second protrusion 212b adjacent to each other in the circumferential direction R of the anvil roller 210 are arranged in a straight line.

[0107] The formation of the stretch sheet continuous body 116 by the forming device 200 will be described.

[0108] In the forming device 200, when the continuous body 114, the elastic member 11, and the continuous body 115 are conveyed along the conveying direction D, the continuous body 115 and the elastic member 11 enter the groove G (arranged at the same position in the width direction S) of the plurality of protrusions 212 arranged along the circumferential direction R of the anvil roller 210. In other words, the forming device 200 conveys the continuous body 114, the elastic member 11, and the continuous body 115 in the conveying direction D in a state where the continuous body 115 and the elastic member 11 enter the groove G. In addition, although it is assumed here that the continuous body 115 and the elastic member 11 enter the groove G, it is not limited to this, and the continuous body 114 and the elastic member 11 may also enter the groove G (in other words, in the forming device 200, the continuous body 114, the elastic member 11, and the continuous body 115 may also be conveyed in a state where the continuous body 114 side is arranged on the inner side).

[0109] The continuum 114 and the continuum 115 are conveyed along the outer peripheral surface 211 of the anvil roller 210 with the elastic member 11 sandwiched therebetween, and when the continuum 114, the elastic member 11, and the continuum 115 pass between the ultrasonic horn 230 and the protrusion 212, the ultrasonic horn 230 and the protrusion 212 of the anvil roller 210 sandwich the continuum 114, the elastic member 11, and the continuum 115 therebetween. In addition, at this time, the ultrasonic horn 230 performs ultrasonic vibration.

[0110] As a result, the continuum 114 and the continuum 115 which are sandwiched and pressurized between the ultrasonic horn 230 and the first surface 212f of the protrusion 212 of the anvil roller 210 are joined (ultrasonic welding).

[0111] In addition, when the continuum 114, the elastic member 11 and the continuum 115 pass between the ultrasonic horn 230 and the protrusion 212, the ultrasonic horn 230 performs ultrasonic vibration, and the elastic member 11 is pressed by the groove surface of the groove G of the protrusion 212 of the ultrasonic horn 230 and the anvil roller 210 between the ultrasonic horn 230 and the bottom surface of the groove G of the protrusion 212 of the anvil roller 210 through the continuum 114 and the continuum 115, and the continuum 114 and the continuum 115 and the elastic member 11 are joined (ultrasonic welding).

[0112] In addition, the protrusion 212 of the anvil roller 210 includes the first protrusion 212a and the second protrusion 212b as described above. Moreover, between the ultrasonic horn 230 and the first protrusion 212a, the continuous body 114 and the continuous body 115 are not joined to the elastic member 11, and between the ultrasonic horn 230 and the second protrusion 212b, at least one of the continuous body 114 and the continuous body 115 is joined to the elastic member 11. The details are described below.

[0113] The first protrusion 212a is a portion that contacts the portion that becomes the male hook-and-loop fastener joint 10d and the outer sheet 15 around it when the stretch sheet continuous body 116 formed by the forming device 200 is used to manufacture the wearing article 1. The first protrusion 212a forms the restriction portion 116b (see FIG. 1 ) on the stretch sheet continuous body 116 by sandwiching the continuous body 114, the elastic member 11, and the continuous body 115 between the ultrasonic horn 230 and joining the continuous body 114 and the continuous body 115. Fig. 9 as well as Fig.10More specifically, the first protrusion 212a sandwiches the continuum 114 and the continuum 115 between the first surface 212f and the ultrasonic horn 230 and presses them to join the continuum 114 and the continuum 115, thereby forming the restriction portion 116b in the stretch sheet body continuum 116.

[0114] In the limiting portion 116b, the continuous bodies 114 and 115 are not joined to the elastic member 11. In addition, when the elastic member 11 is cut by the cutting device 300, the limiting portion 116b limits the contraction movement of the elastic member 11 cut by the cutting device 300 through the continuous bodies 114 and 115. In addition, the fact that the continuous bodies 114 and 115 limit the contraction movement of the elastic member 11 does not mean that the continuous bodies 114 and 115 do not allow the elastic member 11 to contract (the elastic member 11 does not contract), but means that the continuous bodies 114 and 115 limit (suppress) the tendency of the contraction movement of the elastic member 11. In other words, compared with the case where the limiting portion 116b does not exist, the elastic member 11 cut by the cutting device 300 contracts slowly due to the existence of the limiting portion 116b.

[0115] In order to limit the contraction movement of the elastic member 11 by the limiting portion 116b, specifically, in the limiting portion 116b, the elastic member 11 is in a state of being compressed by the continuous body 114 and the continuous body 115. In other words, in the limiting portion 116b of the expansion sheet body continuous body 116, there is a space surrounded by the continuous body 114 and the continuous body 115 in which the elastic member 11 is arranged, but in this space, there is a portion where the maximum gap formed between the continuous body 114 and the continuous body 115 is smaller than the diameter of the elastic member 11 in a state where no tension is applied.

[0116] Next, the second protrusion 212b is a portion of the outer sheet 15 on the side of the absorbent body joint 10b in the waist direction through the male hook-and-loop joint 10d when the stretch sheet continuous body 116 formed by the forming device 200 is manufactured. The second protrusion 212b sandwiches the continuous body 114, the elastic member 11, and the continuous body 115 between the ultrasonic horn 230, and joins at least one of the continuous body 114 and the continuous body 115 to the elastic member 11, thereby forming a fixing portion 116a on the stretch sheet continuous body 116. In addition, in the fixing portion 116a of the present embodiment, both the continuous body 114 and the continuous body 115 are joined to the elastic member 11.

[0117] In order to form such a restricting portion 116 b and a fixing portion 116 a in the stretch sheet continuous body 116 , the first protrusion portion 212 a and the second protrusion portion 212 b preferably have the following composition, respectively.

[0118] The second protrusion 212b has a Figure 7 The plurality of second groove forming portions 216 (see FIG. 1 ) extending in the circumferential direction R of the anvil roller 210 compared to other portions of the second protrusion 212b are drawn within the circle α in FIG. Figure 8 The plurality of second groove forming portions 216 are arranged at intervals from each other in the width direction S of the anvil roller 210 .

[0119] The second groove 216a (groove G) is formed on the first surface 212f of the second groove forming portion 216, into which the continuous body 115 and the elastic member 11 enter among the continuous body 114, the elastic member 11, and the continuous body 115 conveyed along the conveying direction D (see Figure 8 ). Although there is no restriction on the shape, Figure 8 As shown in FIG. 2 , the second groove 216a is a V-shaped groove. In addition, the depth of the second groove 216a is smaller than the sum of the diameter of the elastic member 11 conveyed under tension in the forming device 200 and the thickness of the continuous body 115 (first sum value). As a result, Figure 8 As shown in the cross-sectional view of FIG, the elastic member 11 conveyed in the second groove 216a of the second groove forming portion 216 is at least partially in a state of flying out from the second groove 216a to the radially outer side of the anvil roller 210. Therefore, when the continuous body 114, the elastic member 11, and the continuous body 115 are sandwiched between the second groove forming portion 216 of the second protrusion 212b and the ultrasonic horn 230, the elastic member 11 is pressurized between the ultrasonic horn 230 and the second groove forming portion 216 via the continuous body 114 and the continuous body 115, so that the continuous body 114 and the continuous body 115 and the elastic member 11 are bonded.

[0120] The first width direction protrusion 212aa has a Figure 7 The first groove forming portions 214 are drawn within the circle β in FIG. 1 and extend in the circumferential direction R of the anvil roller 210 compared to other portions of the first width direction protrusion 212aa. The first groove forming portions 214 are arranged at intervals from each other in the width direction S of the anvil roller 210. The first width direction protrusion 212aa has a first groove forming portion 214 of the shape described below at least at a position corresponding to the first circumferential direction protrusion 212ab in the width direction S of the anvil roller 210.

[0121] In the first groove forming portion 214, a first groove 214a (groove G) is formed in which the continuous body 115 and the elastic member 11 enter among the continuous body 114, the elastic member 11, and the continuous body 115 conveyed along the conveying direction D. Although the shape is not limited, Fig. 9 As shown, the first groove 214a is a U-shaped groove.

[0122] In addition, the depth of the first groove 214a is greater than the sum of the diameter of the elastic member 11 conveyed in the forming device 200 under the tension and the thickness of the continuous body 115 (first sum value). As a result, the elastic member 11 conveyed in the first groove 214a of the first groove forming portion 214 is entirely contained in the first groove 214a. Therefore, when the continuous body 114, the elastic member 11, and the continuous body 115 are sandwiched between the first groove forming portion 214 of the first width-direction protrusion 212aa and the ultrasonic horn 230, the elastic member 11 is not pressurized between the ultrasonic horn 230 and the bottom surface of the first groove 214a of the first groove forming portion 214, and the continuous body 114 and the continuous body 115 are not bonded to the elastic member 11. When the continuum 114, the elastic member 11, and the continuum 115 are sandwiched between the first groove forming portion 214 of the first width direction protrusion 212aa and the ultrasonic horn 230, only the continuum 114 and the continuum 115 are joined between the first surface 212f of the first width direction protrusion 212aa and the ultrasonic horn 230.

[0123] Furthermore, the depth of the first groove 214a is preferably smaller than the sum of the diameter of the elastic member 11 in a state without tension and the thickness of the continuous body 115 (a second sum value). As a result, when the elastic member 11 is partially cut as described later and the elastic member 11 is to be restored to its original state (a state of natural length without tension) by a restoring force, the elastic member 11 is pressed by the continuous body 114 and the continuous body 115, so that the contraction movement of the elastic member 11 is limited by the friction force of at least one of the elastic member 11 and the continuous body 114 and the continuous body 115.

[0124] In addition, preferably, the width of the first groove 214a (the dimension of the anvil roller 210 in the width direction S) is greater than the sum of twice the diameter of the elastic member 11 and the thickness of the continuum 115 transported along the transport direction D by the forming device 200 (a third total value), and is less than the sum of twice the diameter of the elastic member 11 and the thickness of the continuum 115 in a state without tension (a fourth total value).

[0125] As a result, when the elastic member 11 is partially cut as described later, and the elastic member 11 is restored to its original state (the state of natural length without tension) by the restoring force, the diameter of the elastic member 11 becomes larger than when it is stretched. Therefore, the elastic member 11 is in a state where pressure is applied by the continuous body 114 and the continuous body 115, and the contraction movement of the elastic member 11 is limited by the friction force of at least one of the elastic member 11 and the continuous body 114 and the continuous body 115.

[0126] The first circumferential protrusion 212ab has a Figure 7 The first groove forming portion 215 (see FIG. 1 ) which is drawn within the ellipse γ in FIG. 1 and projects radially outward from the anvil roller 210 to the same height h as the first widthwise protrusion 212aa. Fig.10 ). Although the first groove forming portion 215 is different from the first groove forming portion 214 in that it extends longer in the circumferential direction R of the anvil roller 210 than the first groove forming portion 214, the cross-sectional shape of the first groove 215a formed in the first groove forming portion 215 is the same as that of the first groove 214a (refer to Fig.10 ). In addition, the first groove 215a and the first groove 214a achieve the same purpose. Here, the detailed description of the first groove forming portion 215 and the first groove 215a is omitted.

[0127] In addition, the cutting device 300 cuts the elastic member 11 of the stretch sheet body continuum 116 at the limiting portion 116b formed by the first protrusion 212a (the first circumferential protrusion 212ab and the first circumferential protrusion 212ab) along the CD direction orthogonal to the MD direction of the stretch sheet body continuum 116. Although not limited, here, the cutting device 300 cuts the elastic member 11 of the stretch sheet body continuum 116 at the central portion of the limiting portion 116b formed by the first protrusion 212a (the first circumferential protrusion 212ab and the first circumferential protrusion 212ab) in the waist direction (in the MD direction of the stretch sheet body continuum 116). By cutting the elastic member 11 at this position, the elastic member 11 moves toward the fixing portion 116a adjacent to the limiting portion 116b at a relatively low speed while its contraction movement is limited by the limiting portion 116b, thereby forming one of the male hook and loop joints 10d of the waist body 16 manufactured by the stretch sheet continuum 116 transported on the downstream side of the transport direction D than the cutting position, and one of the male hook and loop joints 10d of the waist body 16 manufactured by the stretch sheet continuum 116 transported on the upstream side of the transport direction D than the cutting position.

[0128] Fig.11 The elastic member 11 is partially cut by the cutting device 300, and the stretch sheet continuous body 116 having the absorbent body joint part 10b and the male hook and loop joint part 10d is formed.

[0129] As a result of setting the limiting portion 116b, the male buckle joint portion 10d of the stretch sheet body continuum 116 and its surroundings form the first area B1 that is the first part in the claims and the third area B3 that is the third part in the claims when the stretch sheet body is applied to the waist body 16. In addition, as a result of setting the fixing portion 116a, around the stretch sheet body continuum 116, when the stretch sheet body is applied to the waist body 16, the second area B2 that is the second part in the claims is formed in the stretch sheet body continuum 116.

[0130] The first area B1 is a portion where the elastic member 11 does not exist as a result of the contraction of the elastic member 11. In the second area B2, the elastic member 11 is joined to at least one (here both) of the continuous body 114 and the continuous body 115, which corresponds to the fixed portion 116a of the stretch sheet continuous body 116. The third area B3 is a portion arranged between the first area B1 and the second area B2.

[0131] Moreover, if Fig.13 As shown, in the first region B1, in a cross-sectional view cut along a direction perpendicular to the waist direction (roughly the first direction in which the elastic member 11 extends) (i.e., a cross-sectional view cut along a direction perpendicular to the conveying direction D of the stretch sheet continuous body 116), there is a maximum gap between the inner sheet 14 and the outer sheet 15 connected to the space in which the elastic member 11 is arranged in the second region B2, which is smaller than the (natural length) of the elastic member 11 in a state without tension ( Fig.13 The diameter of the part (depicted by a two-dot chain line). And / or, Fig.12 As shown, in the third region B3, there exists: in the cross-sectional view cut along the direction orthogonal to the waist direction, the maximum gap between the inner sheet 14 and the outer sheet 15 connected to the space provided with the elastic member 11 in the second region B2 is smaller than the (natural length) of the elastic member 11 in the state without tension ( Fig.12 The portion of the diameter (depicted by a double-dashed line).

[0132] The effect obtained by the presence of the first area B1 or the third area B3 will be described.

[0133] Here, in at least one of the first area B1 and the third area B3, the maximum gap between the inner sheet 14 and the outer sheet 15 connected to the space in the second area B2 where the elastic member 11 is arranged (referred to as the elastic member arrangement space here) is smaller than the diameter of the elastic member 11 (natural length) in the state without tension.

[0134] Therefore, in the manufacturing process of the stretch sheet, when the cutting device 300 cuts off the elastic member 11 and the first area B1 changes from a space for configuring the elastic member 11 to a state in which the elastic member 11 is contracted and does not exist, a sliding friction force is generated between at least one of the inner sheet 14 (continuum 114) and the outer sheet 15 (continuum 115) and the elastic member 11, thereby reducing the contraction speed of the elastic member 11.

[0135] In addition, similarly, when the cutting device 300 cuts off the elastic member 11 and the third area B3 changes from a space for configuring the elastic member 11 to a state in which the elastic member 11 is contracted and does not exist, a sliding friction force is generated between at least one of the inner sheet 14 (continuum 114) and the outer sheet 15 (continuum 115) and the elastic member 11, thereby reducing the contraction speed of the elastic member 11.

[0136] (4) Features

[0137] (4-1)

[0138] The manufacturing device 100 of the stretch sheet body of the present embodiment includes: a forming device 200 as an example of a forming unit and a cutting device 300 as an example of a cutting unit. The forming device 200 forms a stretch sheet body continuum 116 which is integrated with a continuous continuum 114, a continuous continuum 115 and a continuous elastic member 11 arranged between the continuum 114 and the continuum 115. The cutting device 300 cuts the elastic member 11 of the stretch sheet body continuum 116. The forming device 200 has an anvil roller 220 as an example of a first joining member and an ultrasonic horn 230 as an example of a second joining member. The anvil roller 210 supports the continuum 114, the elastic member 11 and the continuum 115 conveyed in the conveying direction D. The ultrasonic horn 230 sandwiches the continuum 114, the elastic member 11 and the continuum 115 between the anvil roller 210 and the ultrasonic horn 230. The anvil roller 210 has a first protrusion 212a as an example of a first portion and a second protrusion 212b as an example of a second portion on an outer peripheral surface 211 as an example of an opposing surface to the ultrasonic horn 230 as a second joining member. The second protrusion 212b is arranged adjacent to the first protrusion 212a in the conveying direction D. The ultrasonic horn 230 sandwiches the elastic member 11, the continuous body 114, and the continuous body 115 between the first protrusion 212a of the anvil roller 210, and joins the continuous body 114 and the continuous body 115, thereby forming a restriction portion 116b on the stretch sheet continuous body 116. The ultrasonic horn 230 sandwiches the elastic member 11, the continuum 114, and the continuum 115 between the second protrusion 212b of the anvil roller 210, and joins the elastic member 11 and at least one of the continuum 114 and the continuum 115, thereby forming a fixing portion 116a on the expansion sheet body continuum 116. The cutting device 300 cuts the elastic member 11 of the expansion sheet body continuum 116 at the limiting portion 116b of the expansion sheet body continuum 116 being conveyed. In the limiting portion 116b of the expansion sheet body continuum 116, the continuum 114 and the continuum 115 and the elastic member 11 are not joined. In addition, in the limiting portion 116b of the expansion sheet body continuum 116, the contraction movement of the elastic member 11 cut by the cutting device 300 is limited by the continuum 114 and the continuum 115.

[0139] In the manufacturing apparatus 100 of the wearing article 1, it is possible to suppress the occurrence of a problem in which the sheet body and the elastic member 11 in the stretch sheet continuous body 116 become disconnected when the weakening process of cutting the elastic member 11 occurs.

[0140] (4-2)

[0141] In the manufacturing apparatus 100 of the wearing article 1 of the preferred embodiment, the first protrusion 212a of the anvil roller 210 includes first groove forming portions 214 and 215, and the second protrusion 212b of the anvil roller 210 includes a second groove forming portion 216. The first groove forming portions 214 and 215 are formed with first grooves 214a and 215a extending along the conveying direction D into which the elastic member 11 and the continuous body 115 conveyed in the conveying direction D enter. The second groove forming portion 216 is formed with a second groove 216a extending along the conveying direction D into which the elastic member 11 and the continuous body 115 conveyed in the conveying direction D enter. The depth of the first grooves 214a and 215a is greater than a first total value which is a total of the diameter of the elastic member 11 conveyed in the conveying direction D and the thickness of the continuous body 115 in the forming apparatus 200. The depth of the second groove 216a is greater than the first total value.

[0142] In the manufacturing apparatus 100 of the wearing article 1, the elastic member 11 and the continuous body 114 or 115 are joined at the restriction portion 116b, and the elastic force of the elastic member 11 remains in the portion where the stretch sheet continuous body 116 is to be weakened.

[0143] (4-3)

[0144] In the manufacturing apparatus 100 of the wearing article 1 of the preferred embodiment, the depth of the first grooves 214a and 215a is smaller than the second total value which is the total of the diameter of the elastic member 11 and the thickness of the continuous body 115 in a state where no tension is applied.

[0145] In the manufacturing device 100 of the wearing article 1, when the elastic member 11 is cut, the rapid contraction movement of the elastic member 11 is restricted by the continuous body 114 and the continuous body 115, thereby preventing the undesirable situation of the continuous body 114 and / or the continuous body 115 and the elastic member 11 from coming off in the fixing portion 116a.

[0146] (4-4)

[0147] In the manufacturing apparatus 100 of the wearing article 1 of the preferred embodiment, the width of the first grooves 214a and 215a in the width direction S of the anvil roller 210 is larger than the third total value which is the sum of twice the diameter of the elastic member 11 and the thickness of the continuous body 115 conveyed in the conveying direction D in the forming apparatus 200. The width of the first grooves 214a and 215a in the width direction of the anvil roller 210 is smaller than the fourth total value which is the sum of twice the diameter of the elastic member 11 and the thickness of the continuous body 115 in a state where no tension is applied.

[0148] In the manufacturing apparatus 100 of the wearing article 1, it is possible to suppress the first grooves 214a and 215a from obstructing the conveyance of the elastic member 11 or the continuous body 115. On the other hand, in the manufacturing apparatus 100 of the wearing article 1, when the elastic member 11 is cut by the cutting device 300, the rapid contraction movement of the elastic member 11 is restricted by the continuous body 114 and the continuous body 115, thereby suppressing the occurrence of a defect that the continuous body 114 and / or the continuous body 115 and the elastic member 11 are disconnected in the fixing portion 116a.

[0149] (4-5)

[0150] The manufacturing method of the wearing article 1 of the present embodiment includes a forming step and a cutting step. In the forming step, the continuous continuous body 114, the continuous continuous body 115 and the continuous elastic member 11 arranged between the continuous body 114 and the continuous body 115 are integrated to form a stretch sheet continuous body 116. In the cutting step, the elastic member 11 of the stretch sheet continuous body 116 is cut. The forming step includes a conveying step, a first forming step and a second forming step. In the conveying step, the continuous body 114, the continuous body 115 and the elastic member 11 are conveyed in the conveying direction D in a state where the elastic member 11 is arranged between the continuous body 114 and the continuous body 115. In the first forming step, the elastic member 11, the continuous body 114, and the continuous body 115 are sandwiched between the anvil roller 210 as an example of a first bonding member and the ultrasonic horn 230 as an example of a second bonding member that support the continuous body 114, the elastic member 11, and the continuous body 115 conveyed in the conveying direction D, and the elastic member 11 and at least one of the continuous body 114 and the continuous body 115 are bonded, thereby forming the fixed portion 116a in the stretch sheet continuous body 116. In the second forming step, the elastic member 11, the continuous body 114, and the continuous body 115 are sandwiched between the anvil roller 210 and the ultrasonic horn 230, and the continuous body 114 and the continuous body 115 are bonded, thereby forming the limiting portion 116b in the stretch sheet continuous body 116. The limiting portion 116b of the stretch sheet continuous body 116 is formed at a position adjacent to the fixing portion 116a of the stretch sheet continuous body 116. In the cutting process, the elastic member 11 of the stretch sheet continuous body 116 is cut at the limiting portion 116b of the stretch sheet continuous body 116. In the limiting portion 116b of the stretch sheet continuous body 116, the continuous bodies 114 and 115 are not joined to the elastic member 11. In addition, in the limiting portion 116b of the stretch sheet continuous body 116, the contraction movement of the elastic member 11 cut in the cutting process is limited by the continuous bodies 114 and 115.

[0151] In the manufacturing method of the wearing article 1, it is possible to suppress the occurrence of a problem in which the sheet body and the elastic member 11 in the stretch sheet continuous body 116 become disconnected when the weakening process of cutting the elastic member 11 occurs.

[0152] (4-6)

[0153] The wearing article 1 of the present embodiment is a wearing article having a stretch sheet. In particular, in the wearing article 1, the stretch sheet manufactured by the stretch sheet manufacturing device 100 is applied to the waist member 10 arranged on the waist of the wearer. The stretch sheet applied to the waist member 10 includes at least an inner sheet 14, an outer sheet 15 and an elastic member 11. The elastic member 11 extends in a first direction (here, along the waist direction of the user's body) and is arranged between the inner sheet 14 and the outer sheet 15. The stretch sheet applied to the waist member 10 includes a first part (first area B1) and a second part (second area B2) in the first direction. The elastic member 11 does not exist in the first area B1. In the second area B2, the elastic member 11 is bonded to at least one of the inner sheet 14 and the outer sheet 15. In the first area B1, there exists: in the cross-sectional view cut in the direction orthogonal to the first direction, the maximum gap between the inner sheet 14 and the outer sheet 15 which are connected to the space in the third area B3 where the elastic member 11 is arranged is smaller than the diameter of the elastic member 11 (natural length) in the state without tension.

[0154] In the wearing article 1, by having the above-mentioned composition, the contraction movement of the elastic member 11 can be restricted in the first region B1 by the inner sheet 14 and the outer sheet 15. Therefore, in the wearing article 1 of the present invention, the occurrence of the inconvenience of the elastic member 11 and the sheet piece being fixed to the waist member falling off in the second region B2 can be suppressed.

[0155] (4-7)

[0156] In the wearing article 1 of the present embodiment, the stretch sheet body applied to the waist member 10 includes a third portion (third region B3) disposed between the first region B1 and the second region B2 in the first direction (here, the waist direction along the waist of the wearer). In the third region B3, there is a portion where the maximum gap between the space between the inner sheet body 14 and the outer sheet body 15 connected to the space where the elastic member 11 is disposed in the second region B2 in a cross-sectional view cut in a direction orthogonal to the first direction is smaller than the diameter of the elastic member 11 (natural length) in a state where no tension is applied.

[0157] In the wearing article 1, by having the above-mentioned composition, the contraction movement of the elastic member 11 can be restricted in the third region B3 by the inner sheet 14 and the outer sheet 15. Therefore, in the wearing article 1 of the present invention, the occurrence of the inconvenience of the elastic member 11 and the sheet piece being fixed and falling off in the second region B2 of the waist member can be suppressed.

[0158] (5) Modification

[0159] Modifications of the above-described embodiment will be described.

[0160] (5-1) Modification A

[0161] Reference Fig.14 , a forming device 200A of the stretch sheet continuous body 116 of the stretch sheet manufacturing device 100 according to Modification A will be described. Fig.14 This is a diagram schematically showing the forming apparatus 200A.

[0162] In addition, since the forming apparatus 200A has many similarities with the forming apparatus 200 of the above-mentioned embodiment, the differences between the forming apparatus 200A and the forming apparatus 200 will be mainly described here.

[0163] The main difference between the composition of the forming device 200A and the forming device 200 is that the forming device 200A has two or more second joining members arranged along the conveying direction D. In particular, in the present embodiment, in addition to the ultrasonic horn 230 (the second joining member on the most upstream side), the forming device 200A also has an ultrasonic horn 230A (the second joining member on the most downstream side) arranged on the downstream side of the ultrasonic horn 230 in the conveying direction D. The ultrasonic horn 230 and the ultrasonic horn 230A both sandwich the continuum 114, the continuum 115, and the elastic member 11 conveyed in the conveying direction D between the anvil roller 210 as the first joining member, and join the continuum 114 and the continuum 115, and perform joining of the elastic member 11 and at least one of the continuum 114 and the continuum 115. The ultrasonic horn 230 and the ultrasonic horn 230A may be, for example, as follows Fig.14 The horn depicted for ultrasonic welding may also be a roller with a built-in heater.

[0164] The ultrasonic horn 230A as an example of the second bonding member on the most downstream side is arranged downstream of the ultrasonic horn 230 as an example of the second bonding member on the most upstream side in the conveying direction D of the continuous body 114, the elastic member 11, and the continuous body 115. Fig.14 In the circumferential direction of the anvil roller 210, the relative position of the ultrasonic horn 230A and the anvil roller 210 and the relative position of the ultrasonic horn 230 and the anvil roller 210 are arranged at an interval of 180°. However, Fig.14This is just an example of the configuration of the ultrasonic horn 230 and the ultrasonic horn 230A. In the circumferential direction of the anvil roller 210, the relative positions of the ultrasonic horn 230A and the anvil roller 210, and the angle between the relative positions of the ultrasonic horn 230 and the anvil roller 210 can be less than 180° or greater than 180°.

[0165] The main functional difference between forming device 200A and forming device 200 is that forming device 200A is carried out in two stages, namely: the stage of temporary joining of the continuum 114 and the continuum 115, and the joining of the elastic member 11 and at least one of the continuum 114 and the continuum 115 using an ultrasonic horn 230, and the stage of formal joining using an ultrasonic horn 230A.

[0166] First, the reason why welding is performed in two stages is described.

[0167] When the elastic member 11 is joined to at least one of the continuous body 114 and the continuous body 115, the strength of the elastic member 11 is reduced due to heat, and the elastic member 11 may be cut. If the elastic member 11 is cut, the elastic member 11 returns to the upstream side in the conveying direction due to the restoring force of the elastic member 11. Since the elastic member 11 is re-arranged between the continuous body 114 and the continuous body 115, it is sometimes necessary to stop the operation of the manufacturing device 100.

[0168] Therefore, here, first, the elastic member 11 is temporarily joined between the continuous body 114 and the continuous body 115 under the condition that the elastic member 11 is unlikely to be cut, and then the elastic member 11 is firmly joined (formally joined) by welding between the continuous body 114 and the continuous body 115. With this configuration, even if the elastic member 11 is cut during the formal joining, the elastic member 11 can be prevented from moving to the upstream side in the conveying direction at the location where the elastic member 11 is temporarily joined between the continuous body 114 and the continuous body 115.

[0169] In addition, here, temporary bonding refers to a state in which the joined components are bonded to each other so that they can be peeled off. In other words, temporary bonding refers to a weak bonding state in which the materials are not damaged when the joined components are peeled off. In addition, here, formal bonding refers to a state in which the joined components are bonded to each other so that they cannot be peeled off. In other words, formal bonding refers to a strong bonding state in which the materials of at least one of the peeled components will be damaged if the joined components are peeled off.

[0170] In order to achieve the two-stage bonding, the sealing strength between the ultrasonic horn 230A and the anvil roller 210 is set to be greater than the sealing strength between the ultrasonic horn 230 and the anvil roller 210 .

[0171] For example, the ultrasonic horn 230 on the most upstream side in the conveying direction D sandwiches the continuum 114, the elastic member 11, and the continuum 115 between the anvil roller 210 with a relatively weak pressure (first pressure), and forms a temporary joint portion where the elastic member 11 and at least one of the continuum 114 and the continuum 115 are temporarily joined by ultrasonic welding. On the other hand, the ultrasonic horn 230A on the most downstream side in the conveying direction D sandwiches the temporary joint portion between the anvil roller 210 with a relatively strong pressure (second pressure greater than the first pressure), and formally joins the elastic member 11 and at least one of the continuum 114 and the continuum 115 by ultrasonic welding. Although the numerical values ​​are not limited, for example, the first pressure is 700 to 800 N, and the second pressure is 1250 N.

[0172] In addition, when the ultrasonic horn 230 and the ultrasonic horn 230A are rollers with built-in heaters, the force for sandwiching the continuum 114, the elastic member 11, and the continuum 115 between the ultrasonic horns 230, 230A and the anvil roller 210 is set to be constant, and the temperature of the heater can be set lower in the ultrasonic horn 230 and higher in the ultrasonic horn 230A.

[0173] In addition, in the forming apparatus 200A, the stretch sheet continuous body obtained by the main joining using the ultrasonic horn 230A may be the same as the stretch sheet continuous body 116 described in the above embodiment.

[0174] However, the features of the forming device 200A are also useful in manufacturing a continuous stretch sheet body that does not have the fixing portion 116a and the limiting portion 116b described in the above embodiment. In other words, even if the forming device 200A does not have the first protrusion portion 212a and the second protrusion portion 212b, the features of the forming device 200A are also useful.

[0175] A method for manufacturing the stretch sheet in the forming apparatus 200A will be described.

[0176] The manufacturing method of the stretch sheet body includes a forming step, in which a continuous body 114 as an example of a continuous first sheet body, a continuous body 115 as an example of a continuous second sheet body, and a continuous elastic member 11 disposed between the continuous body 114 and the continuous body 115 are integrated to form a stretch sheet body continuous body 116. The forming step includes a conveying step, a first forming step, and a second forming step.

[0177] In the conveying step, the continuous body 114 , the continuous body 115 , and the elastic member 11 are conveyed in the conveying direction in a state where the elastic member 11 is disposed between the continuous body 114 and the continuous body 115 .

[0178] In the first forming process, the elastic member 11, the continuum 114, and the continuum 115 are sandwiched between the anvil roller 210 as an example of a first joining member that supports the continuum 114, the elastic member 11, and the continuum 115 being transported in the conveying direction D, and the ultrasonic horn 230 as an example of an upstream second joining member, and a temporary joining portion is formed in which the elastic member 11 and at least one of the continuum 114 and the continuum 115 are temporarily joined.

[0179] In the second forming step, the elastic member 11 and at least one of the continuous bodies 114 and 115 are formally joined by sandwiching a provisional joining portion between the anvil roller 210 and an ultrasonic horn 230A as an example of a downstream second joining member, thereby forming the stretch sheet continuous body 116 .

[0180] Finally, the features of the manufacturing apparatus 100 for the wearing article 1 including the forming apparatus 200A will be described.

[0181] The manufacturing device 100 of the wearing article 1 includes a forming device 200A as an example of a forming unit, wherein the forming unit forms a stretch sheet body continuous body 116 which is formed by integrating a continuous body 114 as an example of a continuous first sheet body, a continuous body 115 as an example of a continuous second sheet body, and a continuous elastic member 11 arranged between the continuous body 114 and the continuous body 115. The forming device 200A has an anvil roller 220 as an example of a first joining member and ultrasonic horns 230, 230A as an example of a second joining member. The anvil roller 210 supports the continuous body 114, the elastic member 11, and the continuous body 115 conveyed in the conveying direction D. Two or more (two in the present embodiment) second joining members are arranged along the conveying direction D. The ultrasonic horns 230, 230A of the second joining member sandwich the continuous body 114, the elastic member 11, and the continuous body 115 between the anvil roller 210. At least the ultrasonic horn 230 on the most upstream side in the conveying direction D sandwiches the continuum 114, the elastic member 11, and the continuum 115 between the anvil roller 210, and forms a temporary joint portion where the elastic member 11 and at least one of the continuum 114 and the continuum 115 are temporarily joined. The ultrasonic horn 230A sandwiches the temporary joint portion between the anvil roller 210, and formally joins the elastic member 11 and at least one of the continuum 114 and the continuum 115, thereby forming the stretch sheet body continuum 116.

[0182] In the manufacturing device 100, it is possible to prevent the elastic member 11 from being cut when the elastic member 11 is joined to at least one of the continuum 114 and the continuum 115, and the elastic member 11 is pulled back to the upstream side due to the restoring force, thereby preventing the manufacturing device 100 from stopping the wearable article 1 in order to reconfigure the elastic member 11.

[0183] In addition, here, the case where there are two second joining members is described as an example, but three or more second joining members may be arranged along the conveying direction D. In this case, at least the second joining member on the most upstream side is used for forming the temporary joining portion, and at least the second joining member on the most downstream side is used for formal joining of the elastic member and at least one of the first sheet body and the second sheet body.

[0184] (5-2) Modification B

[0185] In Modification A, the elastic member 11 and at least one of the continuous body 114 and the continuous body 115 are joined at the temporary joining portion. However, the elastic member 11 and at least one of the continuous body 114 and the continuous body 115 may not be joined at the temporary joining portion.

[0186] Specifically, in the temporary joining portion, only the continuous body 114 and the continuous body 115 may be joined by welding or the like, and the elastic member 11 and the continuous body 114 and the continuous body 115 may not be joined. Even in this form, even if the elastic member 11 is cut during the formal joining, when the elastic member 11 is cut and recovers its natural length, the diameter of the elastic member 11 increases, so that the elastic member 11 can be sandwiched at the joining portion of the continuous body 114 and the continuous body 115, thereby suppressing the occurrence of the elastic member 11 shrinking and moving to the upstream side in the conveying direction.

[0187] (5-3) Modification C

[0188] In the forming device 200A of Modification A, the ultrasonic horn 230 and the ultrasonic horn 230A are arranged for one anvil roller 210 as the first bonding member, but the composition of the forming device is not limited to this. The forming device may have two or more first bonding members arranged along the conveying direction D.

[0189] For example, Fig.15 As shown, in addition to the anvil roller 210 disposed on the most upstream side of the conveying direction D, the forming device 200B may also include an anvil roller 210A disposed on the most downstream side of the conveying direction D. Moreover, in the forming device 200B, the ultrasonic horn 230 sandwiches the continuum 114, the elastic member 11, and the continuum 115 between the anvil roller 210, and forms a temporary joint portion where the elastic member 11 and at least one of the continuum 114 and the continuum 115 are temporarily joined. In addition, in the forming device 200B, the ultrasonic horn 230A sandwiches the temporary joint portion between the anvil roller 210A, and formally joins the elastic member 11 and at least one of the continuum 114 and the continuum 115, thereby forming the stretch sheet body continuum 116.

[0190] In this case, the forming device 200B is preferably designed so that the anvil roller 210 and the anvil roller 210A have the same pattern of protrusions 212 on the outer peripheral surface 211, and the continuous body 115 contacts the same (corresponding) position of the anvil roller 210 and the anvil roller 210A. Specifically, the forming device 200B is preferably designed so that if a certain part of the continuous body 115 contacts the first protrusion 212a of the anvil roller 210, the part of the continuous body 115 also contacts the first protrusion 212a at the anvil roller 210A.

[0191] (5-4) Modification D

[0192] In the above embodiment, the first bonding member is described as an anvil roller, but the first bonding member is not limited to a roller. Figure 7 The illustrated flat plate-shaped member has a protrusion 212 on the surface facing the second joining member.

[0193] Finally, the technical ideas that can be grasped from the above-mentioned embodiments are reviewed below.

[0194] The manufacturing device of the stretch sheet of the first aspect is provided with a forming part and a cutting part. The forming part forms a stretch sheet continuous body which is integrated by a continuous first sheet, a continuous second sheet, and a continuous elastic member arranged between the first sheet and the second sheet. The cutting part cuts the elastic member of the stretch sheet continuous body. The forming part has a first joining member and a second joining member. The first joining member supports the first sheet, the elastic member and the second sheet which are transported in the transport direction. The second joining member sandwiches the first sheet, the elastic member and the second sheet between the first joining member and the second joining member. The first joining member has a first part and a second part on the opposite surface opposite to the second joining member. The second part is arranged adjacent to the first part in the transport direction of the first sheet, the elastic member and the second sheet which are supported and transported by the first joining member. The second joining member forms a limiting part on the stretch sheet continuous body by sandwiching the elastic member, the first sheet and the second sheet between the first part of the first joining member and joining the first sheet and the second sheet. The second joining member sandwiches the elastic member, the first sheet and the second sheet between the second part of the first joining member and joins the elastic member and at least one of the first sheet and the second sheet, thereby forming a fixing portion on the telescopic sheet continuous body. The cutting portion cuts off the elastic member of the telescopic sheet continuous body at the limiting portion of the telescopic sheet continuous body being transported. In the limiting portion of the telescopic sheet continuous body, the first sheet and the second sheet and the elastic member are non-joined. In addition, in the limiting portion of the telescopic sheet continuous body, the contraction movement of the elastic member cut by the cutting portion is limited by the first sheet and the second sheet.

[0195] In the stretch sheet manufacturing apparatus of the first aspect, it is possible to suppress the occurrence of a problem in which the sheet body and the elastic member in the stretch sheet continuous body become disconnected during the weakening process of cutting the elastic member.

[0196] The manufacturing device of the telescopic sheet body of the second aspect is based on the manufacturing device of the telescopic sheet body of the first aspect, wherein the first part of the first joining member includes a first groove forming part, and the second part of the first joining member includes a second groove forming part. In the first groove forming part, a first groove extending in the conveying direction is formed, into which the elastic member conveyed in the conveying direction and the second sheet body enter. In the second groove forming part, a second groove extending in the conveying direction is formed, into which the elastic member conveyed in the conveying direction and the second sheet body enter. The depth of the first groove is greater than the sum of the diameter of the elastic member conveyed in the conveying direction in the forming part and the thickness of the second sheet body, i.e., the first total value. The depth of the second groove is less than the first total value.

[0197] In the stretch sheet manufacturing apparatus according to the second aspect, the elastic member and the first sheet or the second sheet are joined at the restriction portion, and the elastic force of the elastic member is prevented from remaining in the portion to be weakened of the stretch sheet continuous body.

[0198] The stretch sheet manufacturing apparatus according to a third aspect is the stretch sheet manufacturing apparatus according to the second aspect, wherein the depth of the first groove is smaller than a second total value which is a total of a diameter of the elastic member in a state without tension and a thickness of the second sheet.

[0199] In the manufacturing device of the stretch sheet of the third aspect, when the elastic member is cut, the first sheet and the second sheet are used to limit the rapid contraction movement of the elastic member, thereby preventing the first sheet and / or the second sheet from coming loose from the elastic member in the fixing portion.

[0200] The manufacturing device of the stretch sheet body of the fourth aspect is based on the manufacturing device of the stretch sheet body of the second aspect or the third aspect, and the width of the first groove in the width direction of the first joining member is greater than the sum of the diameter of the elastic member conveyed in the conveying direction in the forming portion and twice the thickness of the second sheet body, that is, the third total value. The width of the first groove in the width direction of the first joining member is less than the sum of the diameter of the elastic member in a state without tension and twice the thickness of the second sheet body, that is, the fourth total value.

[0201] In the manufacturing device of the stretchable sheet body of the fourth aspect, the first groove can prevent the transport of the elastic member or the second sheet body from being blocked. On the other hand, in the manufacturing device of the stretchable sheet body of the fourth aspect, when the elastic member is cut by the cutting portion, the first sheet body and the second sheet body are used to limit the rapid contraction movement of the elastic member, thereby preventing the first sheet body and / or the second sheet body from coming off from the engagement with the elastic member in the fixing portion.

[0202] In the manufacturing device of the stretch sheet of the wearing article of the fifth aspect, there is a forming unit, which forms a stretch sheet continuous body integrated with a continuous first sheet, a continuous second sheet, and a continuous elastic member arranged between the first sheet and the second sheet. The forming unit has a first joining member and a second joining member. The first joining member supports the first sheet, the elastic member and the second sheet to be transported in the conveying direction. Two or more second joining members are arranged along the conveying direction. At least the second joining member on the most upstream side of the conveying direction sandwiches the first sheet, the elastic member and the second sheet between the first joining member, and forms a temporary joining portion where the elastic member and at least one of the first sheet and the second sheet are temporarily joined. At least the second joining member on the most downstream side of the conveying direction sandwiches the temporary joining portion between the first joining member, and formally joins the elastic member and at least one of the first sheet and the second sheet, thereby forming a stretch sheet continuous body.

[0203] In the manufacturing device of the stretch sheet body of the fifth aspect, it is possible to prevent the elastic member from being cut off when the elastic member is joined to at least one of the first sheet body and the second sheet body, and the elastic member is pulled back to the upstream side due to the restoring force, thereby preventing the occurrence of an undesirable situation in which the manufacturing device of the stretch sheet body needs to be stopped in order to reconfigure the elastic member.

[0204] The manufacturing device of the stretch sheet body of the sixth aspect is based on the manufacturing device of the stretch sheet body of the fifth aspect, wherein the first joining member includes at least two of the first joining member on the most upstream side of the conveying direction and the first joining member on the most downstream side of the conveying direction. The second joining member on the most upstream side sandwiches the first sheet body, the elastic member and the second sheet body between the first joining member on the most upstream side, and forms a temporary joining portion where the elastic member and at least one of the first sheet body and the second sheet body are temporarily joined. The second joining member on the most downstream side sandwiches the temporary joining portion between the first joining member on the most downstream side, and formally joins the elastic member and at least one of the first sheet body and the second sheet body, thereby forming a stretch sheet body continuum.

[0205] The manufacturing method of the stretch sheet of the seventh aspect comprises a forming process and a cutting process. In the forming process, a continuous first sheet, a continuous second sheet, and a continuous elastic member arranged between the first sheet and the second sheet are integrated to form a stretch sheet continuous body. In the cutting process, the elastic member of the stretch sheet continuous body is cut. The forming process includes a conveying process, a first forming process, and a second forming process. In the conveying process, the first sheet, the second sheet, and the elastic member are conveyed in the conveying direction in a state where the elastic member is arranged between the first sheet and the second sheet. In the first forming process, the elastic member, the first sheet, and the second sheet are sandwiched between the first joining member and the second joining member that support the first sheet, the elastic member, and the second sheet conveyed in the conveying direction, and the elastic member is joined to at least one of the first sheet and the second sheet, thereby forming a fixing portion in the stretch sheet continuous body. In the second forming process, the elastic member, the first sheet, and the second sheet are sandwiched between the first joining member and the second joining member, and the first sheet and the second sheet are joined, thereby forming a limiting portion in the stretch sheet continuous body. In the cutting process, the elastic member of the stretch sheet body continuum is cut at the limiting portion of the stretch sheet body continuum. The limiting portion of the stretch sheet body continuum is formed at a position adjacent to the fixing portion of the stretch sheet body continuum. In the limiting portion of the stretch sheet body continuum, the first sheet body and the second sheet body and the elastic member are not joined. In the limiting portion of the stretch sheet body continuum, the contraction movement of the elastic member cut in the cutting process is limited by the first sheet body and the second sheet body.

[0206] In the method for manufacturing the stretch sheet according to the seventh aspect, it is possible to suppress the occurrence of a problem in which the sheet body and the elastic member in the stretch sheet continuous body become disconnected during the weakening process of cutting the elastic member.

[0207] In the manufacturing method of the stretch sheet of the eighth aspect, there is provided: a forming step, integrating a continuous first sheet, a continuous second sheet, and a continuous elastic member arranged between the first sheet and the second sheet, thereby forming a stretch sheet continuous body. The forming step includes a conveying step, a first forming step, and a second forming step. In the conveying step, the first sheet, the second sheet, and the elastic member are conveyed in the conveying direction in a state where the elastic member is arranged between the first sheet and the second sheet. In the first forming step, the elastic member, the first sheet, and the second sheet are sandwiched between a first joining member supporting the first sheet, the elastic member, and the second sheet conveyed in the conveying direction and an upstream second joining member, and a temporary joining portion is formed where the elastic member and at least one of the first sheet and the second sheet are temporarily joined. In the second forming step, the temporary joining portion is sandwiched between the first joining member and the downstream second joining member arranged on the downstream side of the conveying direction of the upstream second joining member, and the elastic member and at least one of the first sheet and the second sheet are formally joined, thereby forming a stretch sheet continuous body.

[0208] In the manufacturing method of the stretch sheet body of the eighth aspect, it is possible to prevent the elastic member from being cut off when the elastic member is joined to at least one of the first sheet body and the second sheet body, and the elastic member is pulled back to the upstream side due to the restoring force, thereby preventing the occurrence of an undesirable situation in which the manufacturing device of the stretch sheet body needs to be stopped in order to reconfigure the elastic member.

[0209] The wearing article of the ninth aspect has a stretchable sheet. The stretchable sheet includes at least a first sheet, a second sheet and an elastic member. The elastic member extends in a first direction and is arranged between the first sheet and the second sheet. The stretchable sheet includes a first part and a second part in the first direction. There is no elastic member in the first part. In the second part, the elastic member is joined to at least one of the first sheet and the second sheet. In the first part, there is a part in which, in a cross-sectional view cut in a direction orthogonal to the first direction, the maximum gap between the space between the first sheet and the second sheet connected to the space in which the elastic member is arranged in the third part is smaller than the diameter of the elastic member in a state where no tension is applied.

[0210] In the wearing article of the ninth aspect, by having the above-mentioned composition, the first sheet piece and the second sheet piece can limit the contraction movement of the elastic member in the first portion. Therefore, in the wearing article of the present invention, it is possible to suppress the occurrence of the inconvenience of the elastic member and the sheet piece being fixed to the second portion of the waist member falling off.

[0211] The wearing article of the tenth aspect is the wearing article of the ninth aspect, wherein the stretch sheet body further includes a third portion, the third portion being arranged between the first portion and the second portion in the first direction. In the third portion, there is a portion in which the maximum gap between the space between the first sheet body piece and the second sheet body piece, which is connected to the space in which the elastic member is arranged in the second portion in a cross-sectional view cut in a direction perpendicular to the first direction, is smaller than the diameter of the elastic member in a state where no tension is applied.

[0212] In the wearing article of the tenth aspect, by having the above-mentioned composition, the shrinkage movement of the elastic member can be restricted by the first sheet piece and the second sheet piece in the third portion. Therefore, in the wearing article of the present invention, the occurrence of the inconvenience of the elastic member and the sheet piece being fixed to the second portion of the waist member falling off can be suppressed.

[0213] Explanation of symbols

[0214] 1. Wearing items

[0215] 10 waist member (expansion sheet body)

[0216] 11 Elastic components

[0217] 14 Inner sheet (first sheet)

[0218] 15 Outer sheet (second sheet)

[0219] 100 Manufacturing device for telescopic sheet

[0220] 114 Continuum (First Sheet)

[0221] 115 continuum (second piece)

[0222] 116 telescopic sheet continuum

[0223] 116a Fixed part

[0224] 116b Restriction

[0225] 200 forming device (forming unit)

[0226] 210 Anvil roller (first joining member, first joining member on the most upstream side)

[0227] 210A Anvil roller (first joining member, first joining member on the most downstream side)

[0228] 211 outer surface (opposite surface)

[0229] 212a first protrusion (first part)

[0230] 212b second protrusion (second part)

[0231] 214 first groove forming portion

[0232] 214a first slot

[0233] 215 first groove forming portion

[0234] 215a First slot

[0235] 216 second groove forming portion

[0236] 216a Second slot

[0237] 230 Ultrasonic horn (second joining member, upstream second joining portion)

[0238] 230A ultrasonic horn (second joining member, downstream second joining portion)

[0239] 300 cutting device (cutting part)

[0240] B1 Area 1 (Part 1)

[0241] B2 Second Area (Second Part)

[0242] B3 Third Area (Part 3)

[0243] D. Transport direction

[0244] S width direction.

Claims

1. A manufacturing device for a telescopic sheet, comprising: A forming part, forming a stretch sheet body continuous body formed by integrating a continuous first sheet body, a continuous second sheet body, and a continuous elastic member disposed between the first sheet body and the second sheet body; A cutting portion for cutting the elastic member of the continuous body of the stretchable sheet; The forming portion includes: a first joining member that supports the first sheet body, the elastic member, and the second sheet body that are conveyed in a conveying direction; a second joining member sandwiching the first sheet, the elastic member and the second sheet with the first joining member; The first joining member has a first portion and a second portion disposed adjacent to the first portion in the conveying direction on a surface opposite to the second joining member; The second joining member sandwiches the elastic member, the first sheet body, and the second sheet body between the second joining member and the first portion of the first joining member, and joins the first sheet body and the second sheet body, thereby forming a restriction portion in the stretch sheet body continuous body. The second joining member further sandwiches the elastic member, the first sheet body, and the second sheet body between the second part of the first joining member and joins the elastic member and at least one of the first sheet body and the second sheet body, thereby forming a fixing portion on the stretchable sheet body continuous body; The cutting unit cuts the elastic member of the stretch sheet continuous body at the limiting portion of the stretch sheet continuous body being conveyed; In the restricting portion, the first sheet body and the second sheet body are not joined to the elastic member, and the contraction movement of the elastic member cut by the cutting portion is restricted by the first sheet body and the second sheet body.

2. The manufacturing device of the telescopic sheet according to claim 1, The first portion includes a first groove forming portion, the first groove forming portion forming a first groove extending along the conveying direction into which the elastic member conveyed in the conveying direction and the second sheet enter; The second portion includes a second groove forming portion, the second groove forming portion forming a second groove extending along the conveying direction into which the elastic member conveyed in the conveying direction and the second sheet enter; The depth of the first groove is greater than a first total value which is a total of a diameter of the elastic member conveyed in the conveying direction in the forming portion and a thickness of the second sheet; The depth of the second groove is smaller than the first total value.

3. The manufacturing device of the telescopic sheet according to claim 2, The depth of the first groove is smaller than a second total value which is a total of a diameter of the elastic member and a thickness of the second sheet body in a state where no tension is applied.

4. The manufacturing device of the stretchable sheet according to claim 2 or 3, the width of the first groove in the width direction of the first engaging member, is larger than a third total value which is a total of two times the diameter of the elastic member conveyed in the conveying direction in the forming section and the thickness of the second sheet body, and The value is smaller than a fourth total value which is a sum of a diameter of the elastic member in a state where no tension is applied and twice the thickness of the second sheet body.

5. A manufacturing device for a stretchable sheet, comprising: a forming unit for forming a stretchable sheet continuous body formed by integrating a continuous first sheet, a continuous second sheet, and a continuous elastic member disposed between the first sheet and the second sheet; The forming portion has: a first joint member supporting the first sheet, the elastic member, and the second sheet that are transported in a transport direction; a second joining member sandwiching the first sheet, the elastic member, and the second sheet between the first joining member and the first joining member, and two or more second joining members are arranged along the conveying direction; The first sheet, the elastic member, and the second sheet are sandwiched between at least the second joining member and the first joining member on the most upstream side in the conveying direction, and a temporary joining portion is formed in which the elastic member and at least one of the first sheet and the second sheet are temporarily joined; At least the second joining member on the most downstream side in the conveying direction sandwiches the temporarily joined portion with the first joining member and formally joins the elastic member to at least one of the first sheet and the second sheet, thereby forming the stretch sheet continuous body.

6. The manufacturing device of the stretchable sheet according to claim 5, The first joining member includes at least the first joining member on the most upstream side in the conveying direction and the first joining member on the most downstream side in the conveying direction; The second joining member on the most upstream side sandwiches the first sheet, the elastic member and the second sheet between the second joining member on the most upstream side, and forms the temporary joining portion where the elastic member and at least one of the first sheet and the second sheet are temporarily joined; The second joining member on the most downstream side sandwiches the temporary joining portion with the first joining member on the most downstream side, and formally joins the elastic member to at least one of the first sheet body and the second sheet body, thereby forming the stretch sheet body continuous body.

7. A method for manufacturing a telescopic sheet, comprising: a forming step of integrating a continuous first sheet, a continuous second sheet, and a continuous elastic member disposed between the first sheet and the second sheet to form a continuous stretch sheet; A cutting step of cutting the elastic member of the continuous body of the stretchable sheet; The forming process includes: A conveying step of conveying the first sheet, the second sheet, and the elastic member in a conveying direction in a state where the elastic member is disposed between the first sheet and the second sheet; A first forming step includes sandwiching the elastic member, the first sheet, and the second sheet between a first joining member and a second joining member that support the first sheet, the elastic member, and the second sheet being conveyed in the conveying direction, and joining the elastic member to at least one of the first sheet and the second sheet, thereby forming a fixing portion in the stretchable sheet continuous body; A second forming step is to sandwich the elastic member, the first sheet body, and the second sheet body between the first joining member and the second joining member, and join the first sheet body and the second sheet body, thereby forming a restriction portion at a position of the stretch sheet body continuous body adjacent to the fixing portion; In the cutting step, the elastic member of the stretch sheet continuous body is cut at the limiting portion of the stretch sheet continuous body; In the restricting portion, the first sheet body and the second sheet body are not joined to the elastic member, and the contraction movement of the elastic member cut in the cutting step is restricted by the first sheet body and the second sheet body.

8. A method for manufacturing a stretchable sheet, comprising: a forming step of integrating a continuous first sheet, a continuous second sheet, and a continuous elastic member disposed between the first sheet and the second sheet to form a stretchable sheet continuous body; The forming process includes: A conveying step of conveying the first sheet, the second sheet, and the elastic member in a conveying direction in a state where the elastic member is disposed between the first sheet and the second sheet; A first forming step includes sandwiching the elastic member, the first sheet, and the second sheet between a first joining member supporting the first sheet, the elastic member, and the second sheet being conveyed in the conveying direction and a second joining member on an upstream side, thereby forming a temporary joining portion where the elastic member and at least one of the first sheet and the second sheet are temporarily joined; In the second forming step, the temporary joining portion is sandwiched between the first joining member and the downstream second joining member arranged on the downstream side of the conveying direction of the upstream second joining member, and the elastic member and at least one of the first sheet body and the second sheet body are formally joined to form the stretch sheet body continuum.

9. Wearing articles with stretchable panels, The telescopic sheet body at least comprises: A first body piece, a second body piece, and an elastic member extending in a first direction and disposed between the first body piece and the second body piece; The telescopic sheet body includes in the first direction: The first portion of the elastic member is absent; a second portion of the elastic member joined to at least one of the first body piece and the second body piece; In the first part, there exists a part in which, in a cross-sectional view cut in a direction perpendicular to the first direction, the maximum gap between the first sheet piece and the second sheet piece connected to the space in which the elastic member is arranged in the second part is smaller than the diameter of the elastic member in a state without tension.

10. The wearing article according to claim 9, The telescopic sheet further comprises a third portion, and the third portion is arranged between the first portion and the second portion in the first direction; In the third portion, there exists a portion in which, in a cross-sectional view cut in a direction perpendicular to the first direction, the maximum gap between the first sheet piece and the second sheet piece connected to the space in which the elastic member is arranged in the second portion is smaller than the diameter of the elastic member in a state where no tension is applied.

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