JP6402022B2 - Pants-type disposable diaper manufacturing apparatus and manufacturing method - Google Patents

Description

  The present invention relates to an apparatus for manufacturing a pants-type disposable diaper and a method for manufacturing a pants-type disposable diaper.

  Generally, a pants-type disposable diaper is folded in two so that the back side region and the abdominal side region overlap each other after the absorbent main body is attached to the exterior body, and both side edges of the back side region in the exterior body A pair of side seals are formed by joining both side edges of the ventral region and a pant-type. The pants-type disposable diaper is used so that the side seal part is peeled off at the time of undressing. Regarding the joining of a pair of side seal portions of a pants-type disposable diaper, Patent Document 1 proposes an ultrasonic sealing device.

JP 2014-28492 A

  In a pants-type disposable diaper having a pair of side seal portions manufactured by the ultrasonic sealing device described in Patent Document 1, a plurality of joint portions constituting each side seal portion are arranged in multiple rows in the width direction. Preferably, each side seal portion is formed by arranging a plurality of rows of joint portions in which the joint portions are intermittently arranged in the vertical direction in the width direction. As described above, the side seal portion in which the rows of the joint portions are arranged in multiple rows is difficult to peel off at the time of undressing of the pants-type disposable diaper, and there is a concern that the usability may be lowered as a whole.

  In addition, Patent Document 1 discloses a plurality of joints constituting each side seal part having a slanted shape, but the joint area is widened, and it is difficult to further peel off during undressing. As a result, the feeling of use may be further reduced. In addition, Patent Document 1 discloses a plurality of joints constituting each side seal part and having a shape parallel to the width direction of the diaper. Only the distributed form is disclosed, and after all, it is difficult to peel off at the time of undressing, and there is a possibility that the feeling of use may be lowered as a whole. Here, simply forming each side seal portion having only one row of joint portions in which joint portions parallel to the width direction of the diaper are intermittently arranged in the vertical direction, the seal protrusions forming the joint portions When an anvil having only one row is formed, depending on the arrangement relationship between the seal protrusions constituting the adjacent anvil roll, the ultrasonic horn arranged opposite to the anvil roll may be worn away and stably for a long time. It is difficult to ensure the sealing strength, and the production efficiency is lowered.

  Therefore, this invention is providing the manufacturing apparatus and manufacturing method of the underpants type disposable diaper which can eliminate the fault which the prior art mentioned above has.

  According to the present invention, the both side edges of the ventral region and the back region of the exterior body fixed to the non-skin facing surface side of the vertically long absorbent main body having the liquid-retaining absorbent body are joined to each other. A pant-type disposable diaper manufacturing apparatus in which a pair of side seal parts are formed, wherein each side seal part has a seal part extending in parallel to a lateral direction of the diaper, and a vertical direction of the diaper. The seal portion groups of the pair of side seal portions are arranged in the same pitch, and the seal portion groups of the pair of side seal portions have different phases in the longitudinal direction of the diaper. The manufacturing apparatus includes: an anvil that is driven to rotate; and a press member that sandwiches a continuous body of the exterior body that is disposed and conveyed on the outer peripheral surface of the anvil to form a seal region. Is provided with a plurality of blocks having seal convex portions extending in parallel to the conveying direction of the continuum on the outer peripheral surface and having seal convex portions corresponding to the seal portions arranged at the same pitch in the rotation axis direction, The seal convex portions constituting the seal convex portion group included in the two blocks adjacent to each other in the transport direction are arranged in different phases in the rotation axis direction, and viewed from the transport direction, the anvil An apparatus for producing a pants-type disposable diaper in which the seal convex portions of all the provided blocks are arranged without gaps in the rotation axis direction is provided.

  In addition, the present invention joins the both side edges of the ventral region and the back region of the exterior body fixed to the non-skin facing surface side of the vertically long absorbent main body having the liquid-retaining absorbent body. A pant-type disposable diaper manufacturing method in which a pair of side seal parts is formed, wherein each of the side seal parts includes a seal part extending in parallel to a lateral direction of the diaper. The seal unit groups of one row that are arranged at the same pitch in the vertical direction, and the seal unit groups of the pair of side seal units are different in the phase of the seal unit in the vertical direction of the diaper. In the manufacturing method, the continuous body of the exterior body is overlapped so that both sides of the continuous body of the exterior body overlap in a transport direction while transporting the continuous body of the exterior body, and then the continuous body of the exterior body is sealed. Shape seal area And a separation step of separating the pant-type disposable diaper to form the side seal portion at a substantially central position in the transport direction of the seal region, and the sealing step includes an anvil that is driven to rotate, A pressing member disposed opposite to the outer peripheral surface of the anvil, and the anvil has an outer peripheral surface extending in parallel with the conveying direction, and a seal convex portion corresponding to the seal portion at the same pitch in the rotation axis direction. A plurality of blocks each having a seal convex group arranged in the above, and the seal convex parts constituting the seal convex group included in the two blocks adjacent to each other in the transport direction have different phases in the axial direction. The seal projections of all the blocks provided on the anvil are arranged without gaps in the rotation axis direction as viewed from the transport direction. It is intended to provide a method of manufacturing a pants-type disposable diapers you are.

  ADVANTAGE OF THE INVENTION According to this invention, it is easy to peel off joining of a side seal part at the time of undressing, and it is easy to manufacture the underpants type disposable diaper which improves usability as a whole. In addition, it is possible to stably ensure the sealing strength for a long period of time during production, and the production efficiency is improved.

FIG. 1 is a perspective view showing a pants-type disposable diaper obtained by a manufacturing apparatus according to a preferred embodiment of the present invention. FIG. 2 is a developed plan view showing a state where the pants-type disposable diaper shown in FIG. 1 is developed and extended. FIG. 3 is a schematic view showing an embodiment of a sealing device suitably used in the manufacturing apparatus for the pants-type disposable diaper of the present invention. FIG. 4 is a view showing the arrangement of anvils and press members provided in the sealing device shown in FIG. FIG. 5 is an explanatory diagram for explaining the arrangement relationship of the four rows of seal convex portions 73G included in the two anvils included in the seal device shown in FIG. FIG. 6 is a perspective view schematically showing an example of a process for producing a pants-type disposable diaper according to an embodiment of the present invention. FIG. 7 is a view showing a state in which a sealing region is formed in a continuous body of the exterior body by the sealing device shown in FIG.

Hereinafter, the manufacturing apparatus of the underpants type disposable diaper of this invention is demonstrated, referring drawings based on the preferable embodiment.
First, a pants-type disposable diaper manufactured by the manufacturing apparatus of the present embodiment will be described with reference to FIGS.
A pants-type disposable diaper 1 (hereinafter, also simply referred to as “diaper 1”) shown in FIG. 1 is an exterior body fixed to a non-skin facing surface side of a vertically long absorbent main body 10 having a liquid-retaining absorbent body 4. 11 is a diaper in which a pair of side seal portions S, S is formed by joining both side edges A1, A2 of the ventral region 11 and both side edges B1, B2 of the back region B together. More preferably, as shown in FIG. 2, the diaper 1 includes a liquid-permeable top sheet 2, a liquid-impermeable or water-repellent back sheet 3, and a liquid retaining property disposed between the two sheets 2 and 3. A substantially vertically long absorbent main body 10 having the absorbent body 4 and an exterior body 11 which is disposed on the back sheet 3 side of the absorbent main body 10 and fixes the absorbent main body 10.

In the present specification, the “skin facing surface” is a surface of the diaper 1 or a constituent member thereof (for example, the surface sheet 2) that is directed toward the wearer's skin when worn, and the “non-skin facing surface” It is a surface in the diaper 1 or its constituent member that is directed to the side opposite to the wearer's skin side (clothing side) when worn. In the diaper 1, the vertical direction (X direction in the drawing) matches the direction along the long side of the vertical diaper 1, and the horizontal direction (Y direction in the drawing) matches the width direction of the diaper 1.
Moreover, the diaper 1 is symmetrical with respect to the longitudinal center line CL extending in the longitudinal direction (X direction).

  As shown in FIG. 2, the absorbent main body 10 includes an hourglass-shaped absorbent body 4 that is bound inward in the central portion in the longitudinal direction (X direction), the absorbent body 4, the rectangular topsheet 2, and the rectangular shape. The back sheet 3 is integrated into a vertically long shape. As the surface sheet 2, the back surface sheet 3, and the absorber 4, those similar to those conventionally used in this type of diaper can be used. For example, as the top sheet 2, liquid permeable sheets such as various nonwoven fabrics and perforated films subjected to hydrophilic treatment can be used, and as the back sheet 3, a thermoplastic resin film such as a polyethylene film, A liquid-impermeable or water-repellent sheet such as a laminate of the film and the nonwoven fabric can be used. As the absorbent body 4, a core composed of superabsorbent polymer particles and a fiber material is used as a tissue paper ( A material covered with (not shown) can be used. Side cuffs 5 and 5 made of a liquid-resistant or water-repellent and breathable material are arranged on the left and right sides of the absorbent main body 10 along the longitudinal direction (X direction). The side cuff elastic member 51 is arranged in an extended state in the vicinity of the free end portion 5, and when the diaper is worn, the elastic member 51 contracts to form a three-dimensional gather where the side cuff 5 stands.

  As shown in FIG. 2, the exterior body 11 has an hourglass shape in which both side edges are bound inward in the longitudinal direction (X direction) central portion, and defines the outline of the diaper 1. (See FIG. 1). As shown in FIG. 2, the diaper 1 has a ventral region A disposed on the wearer's ventral side and a dorsal region B disposed on the dorsal side when worn in the longitudinal direction (X direction) in the unfolded state. It is divided into a crotch region C located between them. The exterior body 11 is joined to the diaper 1 as shown in FIG. 1 by joining both side edges A1, A2 in the ventral region A and both side edges B1, B2 in the back region B to each other. Side seal portions S, S, a waist opening WO and a pair of leg openings LO, LO are formed. As described above, the pants-type disposable diaper 1 manufactured by the manufacturing apparatus of the present embodiment includes the exterior body 11 having the pair of side seal portions S and S.

  As shown in FIG. 2, the exterior body 11 has a structure in which an outer layer sheet 12 and an inner layer sheet 13 disposed on the inner surface side (absorbent body 10 side) of the outer layer sheet 12 are laminated. The outer layer sheet 12 forms the outer surface of the diaper 1, and the inner layer sheet 13 is disposed on the inner surface side of the outer layer sheet 12 and is partially joined. As shown in FIG. 2, the outer layer sheet 12 is further longitudinally (X direction) than a region where a plurality of waist elastic members 14 described later are sandwiched and fixed by the outer layer sheet 12 and the inner layer sheet 13 in the diaper 1. The extended region is folded back toward the absorbent main body 10 and covers the end of the absorbent main body 10 in the longitudinal direction (X direction). It is fixed via an adhesive (not shown). As the outer layer sheet 12 and the inner layer sheet 13 of the outer package 11, various sheet materials conventionally used for this type of article can be used without particular limitation. When the sheet material is a nonwoven fabric, it is preferably a single-layer sheet or a laminated sheet made of an air-through nonwoven fabric, a heat roll nonwoven fabric, a spunlace nonwoven fabric, a spunbond nonwoven fabric, a melt blown nonwoven fabric, or the like from the viewpoint of flexibility.

  As shown in FIG. 2, the exterior body 11 includes elastic members 14, 15, and 16 between the outer layer sheet 12 and the inner layer sheet 13. The exterior body 11 includes a plurality of waist portion elastic members 14 and a plurality of waistline portion elastic members 15 arranged along the lateral direction (Y direction) in each of the ventral region A and the back region B of the diaper 1. Have. The exterior body 11 has a plurality of leg portion elastic members 16 at the periphery of the leg opening LO. As the elastic members 14, 15, and 16, those obtained by forming a stretchable material such as natural rubber, polyurethane-based resin, and foamed urethane-based resin into a thread shape (thread rubber) or a belt shape (flat rubber) are preferably used.

  The waist elastic member 14 is arranged in a stretched state and fixed to a waist portion located outward from both ends in the longitudinal direction (X direction) of the absorbent main body 10 in the longitudinal direction (X direction) of the diaper 1 in the deployed state. When these contract, a waist gather is formed in the waist.

  The waistline elastic member 15 is provided on the waistline part located inward (in the crotch region C side) from both ends in the longitudinal direction (X direction) of the absorbent main body 10 in the longitudinal direction (X direction) of the diaper 1 in the deployed state. It is arranged and fixed in an extended state, and when these contract, a waistline gather is formed in the waistline part. In the diaper 1 </ b> A, the waistline elastic member 15 in each of the ventral region A and the dorsal region B is cut at a portion overlapping the absorbent main body 10.

  The leg elastic member 16 is arranged and fixed in an extended state from the ventral region A to the crotch region C, and another leg elastic member 16 extends from the dorsal region B to the crotch region C. Leg gathers are formed at the peripheral edge of the leg opening LO by contracting them. In the diaper 1A, the leg elastic members 16, 16 are cut at the center in the lateral direction (Y direction) of the crotch region C and divided into left and right.

  In joining the both side edges A1, A2 of the ventral region A and the both side edges B1, B2 of the back region B, the outer layer sheet 12, the inner layer sheet 13, and the elastic members 14, 15 between these sheets 12, 13 are used. , 16 are bonded to each other by an adhesive such as a hot melt adhesive and a heat seal including a high frequency seal and an ultrasonic seal, and a pair of side seal portions S, S of the diaper 1 is formed. (See FIG. 1). More preferably, the outer layer sheet 12, the inner layer sheet 13, and the elastic members 14, 15, and 16 between the sheets 12, 13 are bonded to each other in the diaper 1. The elastic members 14 are arranged in an extended state between the outer layer sheet 12 and the inner layer sheet 13 at a portion where the pair of side seal portions S, S are formed while being bonded together by an adhesive such as an agent. In order to prevent 15 and 16 from coming off, an adhesive is further applied.

  As shown in FIGS. 1 and 2, each side seal portion S has seal portions 17 extending parallel to the horizontal direction (Y direction) of the diaper arranged at the same pitch P in the vertical direction (X direction) of the diaper. The seal part group 17G has a row of seal part groups 17G, and the seal part groups 17G and 17G of the pair of side seal parts S and S have different phases of the seal part 17 constituting the longitudinal direction (X direction) of the diaper. . Preferably, with respect to the pair of side seal portions S and S provided in the diaper 1 shown in FIG. Arranged to form one row of seal portion groups 17G. Here, one row (the left side) of the seal portion group 17G of the side seal portion S and the other row (the right side) of the seal portion group 17G of the side seal portion S are compared. Pitch P of the plurality of seal portions 17 constituting the seal portion group 17G on the side seal portion S side and pitch of the plurality of seal portions 17 constituting the seal portion group 17G on the other (right side) side seal portion S side P is the same pitch P. More preferably, paying attention to the seal portion 17 closest to the waist opening WO among the plurality of seal portions 17 constituting the seal portion group 17G on the one (left side) side seal portion S side, the seal portion The other seal portions 17 are intermittently arranged at the same pitch P in the vertical direction (X direction) from 17. Further, paying attention to the seal portion 17 closest to the waist opening WO among the plurality of seal portions 17 constituting the seal portion group 17G on the other (right) side seal portion S side, In the direction (X direction), the other seal portions 17 are intermittently arranged at the same pitch P as the pitch P on the side (left side) side seal portion S side.

Preferably, the pitch P is preferably 0.5 mm or more, more preferably 1.5 mm or more, and preferably 10 mm or less, from the viewpoint of required seal strength when worn and ease of tearing when discarded. More preferably, it is 5 mm or less.
The seal portion 17 is formed in a rectangular shape that is long in the horizontal direction (Y direction), and is preferably 0.1 mm or more, more preferably 0.3 mm or more, preferably in the vertical direction (X direction). 2.5 mm or less, more preferably 2.0 mm or less, with respect to the lateral direction (Y direction), preferably 0.5 mm or more, more preferably 1.5 mm or more, preferably 10 mm or less, more preferably 5. 0 mm or less.
Further, the number of seal portions 17 in the longitudinal direction (X direction) is preferably 3 pieces / 30 mm or more, preferably 6 pieces / 30 mm or more, and 60 pieces / 30 mm or less, more preferably 20 pieces / 30 mm or less. is there.
Further, the tearability of the side seal portion S is caused by the pitch P and the length in the lateral direction (Y direction). The pitch P and the length in the lateral direction (Y direction) are equal or the pitch P is larger. From the viewpoint of ease of breaking.

  As shown in FIG. 1, the seal part 17 and the waist opening part closest to the waist opening part WO among the plurality of seal parts 17 constituting the seal part group 17G on the side seal part S on the one (left side) side. The seal portion 17 and the waist opening portion closest to the waist opening portion WO of the plurality of seal portions 17 constituting the seal portion group 17G on the other (right side) side seal portion S side with the interval T1 with the peripheral edge of the WO. It is different from the distance T2 from the peripheral edge of the WO. The distance T1 and the distance T2 are about 10 mm at the maximum. Here, as described above, the pitches P of the plurality of seal portions 17 constituting the seal portion group 17G are all the same. Therefore, one row (the left side) side seal portion S is compared with one row of the seal portion group 17G and the other (right side) side seal portion S is compared with one row of the seal portion group 17G. The phase in the longitudinal direction (X direction) of the plurality of seal portions 17 constituting the seal portion group 17G on the seal portion S side and the plurality of seal portions 17G constituting the seal portion group 17G on the other (right) side seal portion S side. The phase of the seal portion 17 in the vertical direction (X direction) is different. In other words, when the diaper 1 is viewed in the lateral direction (Y direction), the position of the plurality of seal parts 17 constituting the seal part group 17G on the side seal part S side on one side (left side) and the side on the other side (right side) The positions of the plurality of seal portions 17 constituting the seal portion group 17G on the seal portion S side are different.

Next, a preferred embodiment of the manufacturing apparatus for the pants-type disposable diaper of the present invention will be described with reference to the drawings, taking as an example the case of manufacturing the diaper 1 described above.
FIG. 3 schematically shows an example of the sealing device 7 included in the manufacturing apparatus for the diaper 1. As shown in FIGS. 3 and 4, the sealing device 7 sandwiches between the anvil 71 that is rotationally driven and the continuous body 11 </ b> C of the exterior body 11 that is disposed opposite to the outer peripheral surface of the anvil 71 and is conveyed. And an ultrasonic horn 72 as an example of a press member for forming a seal region.

  As shown in FIG. 3, the anvil 71 is rotatable about a horizontal axis 711 in the diaper 1 manufacturing apparatus, and the anvil 71 has a length in the rotation axis direction (Z direction). The length is longer than the length in the direction orthogonal to the conveyance direction (I direction) of the continuous body 11C of the overlaid exterior body 11 described later. Here, the axial direction (Z direction) of the anvil 71 and the direction orthogonal to the transport direction (I direction) of the continuous body 11C of the exterior body 11 are the same direction.

  As shown in FIG. 3, the anvil 71 has a seal convex portion 73 (see FIG. 5) that extends in parallel with the conveyance direction (I direction) of the continuous body 11 </ b> C of the exterior body 11 and that corresponds to the seal portion 17. A plurality of blocks 74 having seal convex portions 73G arranged at the same pitch in the rotation axis direction (Z direction) are provided. Preferably, each block 74 included in the anvil 71 has two rows of seal convex portions 73 </ b> G in the transport direction (I direction) in the diaper 1 manufacturing apparatus. More preferably, five blocks 74 having such two rows of seal convex portion groups 73 </ b> G are attached to the outer peripheral surface of the anvil 71. Each block 74 is attached in parallel to the rotation axis direction (Z direction), and is arranged at a position spaced equally in the rotation direction (circumferential direction) of the anvil 71. The length of each block 74 in the rotation axis direction (Z direction) is longer than the length in the direction (Z direction) orthogonal to the conveyance direction (I direction) of the continuous body 11C of the stacked exterior body 11 described later. Yes. Each block 74 has a seal convex portion group 73G composed of a plurality of seal convex portions 73 corresponding to the seal portion 17 of the diaper 1 on the surface facing the ultrasonic horn 72, as shown in FIGS. , Has two rows in the transport direction (I direction). As shown in FIG. 5, each seal convex portion group 73 </ b> G is formed by intermittently arranging seal convex portions 73 extending parallel to the transport direction (I direction) at the same pitch in the rotation axis direction (Z direction). ing. Of the two blocks 74, when the upstream block 74 and the downstream block 74 are described separately, the upstream block 74 will be described as the upstream block 74U, and the downstream block 74 will be referred to as the upstream block 74. This will be described as the downstream block 74D. Further, the upstream seal convex portion group 73G of the upstream block 74U is described as a first seal convex portion group 73G1, and the downstream seal convex portion group 73G of the upstream block 74U is described as a second seal convex portion group 73G2. The seal convex portion group 73G on the upstream side of the side block 74D will be described as a third seal convex portion group 73G3, and the seal convex portion group 73G on the downstream side of the downstream block 74D will be described as a fourth seal convex portion group 73G4.

  In the manufacturing apparatus for the diaper 1, the seal convex portion 73 is formed in a rectangular shape that is long in the transport direction (I direction) as shown in FIG. 5, and corresponds to the seal portion 17 of the diaper 1. The pitch of the seal projections 73 intermittently arranged in the rotation axis direction (Z direction) constituting the first seal projection group 73G1, and intermittent in the rotation axis direction (Z direction) constituting the second seal projection group 73G2. The pitch of the seal projections 73 arranged in a row, the pitch of the seal projections 73 arranged intermittently in the rotation axis direction (Z direction) constituting the third seal projection group 73G3, the fourth seal projection group 73G4 The pitch of the seal protrusions 73 that are intermittently arranged in the rotation axis direction (Z direction) that constitutes the same is the same pitch. The pitch of the seal convex portions 73 intermittently arranged in the rotation axis direction (Z direction) corresponds to the pitch P of the seal portions 17 of the diaper 1 intermittently arranged in the diaper vertical direction (X direction). Yes. In the manufacturing apparatus of the diaper 1, the interval between the seal projections 73 adjacent to each other in the rotation axis direction (Z direction) is the rotation axis direction (Z direction) of the seal projection 73 as shown in FIG. 3 times the length of (3).

  Further, the seal protrusions 73 constituting the seal protrusion groups 73G and 73G of the two blocks 74 and 74 adjacent to each other in the transport direction (I direction) are arranged with different phases in the rotation axis direction (Z direction). Has been. As described above, in the manufacturing apparatus for the diaper 1, as shown in FIG. 3, the five blocks 74, 74 are attached to the outer peripheral surface of the anvil 71, and each block 74 has a seal convex group 73G. Are arranged in two rows in the transport direction (I direction). Then, as shown in FIG. 5, the seal protrusions 73 included in the four rows of seal protrusions 73G included in the two blocks 74 and 74 adjacent to each other in the transport direction (I direction) are arranged in the rotation axis direction (Z direction). ) Are arranged in different phases. Preferably, the plurality of seal convex portions 73 constituting the first seal convex portion group 73G1 of the upstream block 74U and the plurality of seal convex portions constituting the second seal convex portion group 73G2 of the upstream block 74U. 73, a plurality of seal convex portions 73 constituting the third seal convex portion group 73G3 of the downstream block 74D, and a plurality of seal convex portions 73 constituting the fourth seal convex portion group 73G4 of the downstream block 74D. The phases are different from each other in the rotation axis direction (Z direction).

  More preferably, the distance T3 between the seal projection 73 on the most front side of the plurality of seal projections 73 constituting the first seal projection group 73G1 and the edge on the front side of the upstream block 74U, the first The distance T4 between the frontmost seal convex part 73 of the plurality of seal convex parts 73 constituting the second seal convex part group 73G2 and the front edge of the upstream block 74U, the third seal convex part group 73G3 Among the plurality of seal convex portions 73 constituting the gap T5 between the frontmost seal convex portion 73 and the front side edge of the downstream block 74D, and a plurality of the fourth seal convex portion group 73G4. An interval T5 between the seal convex portion 73 closest to the seal convex portion 73 and the front edge of the downstream block 74D is different from each other. As described above, the pitches of the plurality of seal projections 73 constituting the seal projection group 73G are all the same. Therefore, as shown in FIG. 5, when viewed in the transport direction (I direction), the positions of the plurality of seal convex portions 73 constituting the first seal convex portion group 73G1 and the second seal convex portion group 73G2 are configured. The positions of the plurality of seal projections 73, the positions of the plurality of seal projections 73 constituting the third seal projection group 73G3, and the plurality of seal projections 73 constituting the fourth seal projection group 73G4 The position is different.

  Further, when the entire seal convex portion group 73G of the block 74 is viewed from the conveyance direction (I direction), the seal convex portions 73 included in all the blocks 74 provided in the anvil 71 are arranged without gaps in the rotation axis direction. And in the manufacturing apparatus of the diaper 1, as shown in FIG. 4, the seal convex part 73 which the seal convex part group 73G of 4 rows which the two blocks 74 and 74 which adjoin the conveyance direction (I direction) have has. It is arranged without a gap in the direction of the rotation axis. Preferably, a plurality of seal convex portions 73 constituting the first seal convex portion group 73G1 of the upstream block 74U, a plurality of seal convex portions 73 constituting the second seal convex portion group 73G2 of the upstream block 74U, The plurality of seal convex portions 73 constituting the third seal convex portion group 73G3 of the downstream block 74D and the plurality of seal convex portions 73 constituting the fourth seal convex portion group 73G4 of the downstream block 74D are conveyed in the conveying direction. When viewed from (I direction), all the seal protrusions 73 provided on the anvil 71 are the seal protrusions 73 of the first seal protrusion group 73G1, the seal protrusions 73 of the second seal protrusion group 73G2, The seal convex part 73 of the third seal convex part group 73G3 and the seal convex part 73 of the fourth seal convex part group 73G4 are arranged without gaps without gaps, and extend in the rotation axis direction (Z direction). Continuous line So as to form, it is continuous.

  In the manufacturing apparatus of the diaper 1, as shown in FIG. 5, when attention is paid to any one seal convex portion 73a constituting one seal convex portion group 73G (for example, the first seal convex portion group 73G1), the conveyance is performed. As viewed from the direction (I direction), the positions of both ends 73a1 and 73a2 in the rotational axis direction (Z direction) of the arbitrary seal convex portion 73a, and adjacent to the arbitrary seal convex portion 73a in the rotational axis direction (Z direction) The positions of the ends 73b1 and 73c1 of the seal convex portions 73b and 73c constituting another matching seal convex portion group (second seal convex portion group 73G2 and fourth seal convex portion group 73G4) coincide with each other. Preferably, when viewed from the conveying direction (I direction), the position of the distal end 73a1 in the rotation axis direction (Z direction) of any seal convex portion 73a and the rotation axis direction (Z The position of the end 73b1 on the back side of the seal convex portion 73b constituting another seal convex portion group (second seal convex portion group 73G2) adjacent to the direction) coincides with the rotation of the arbitrary seal convex portion 73a. The position of the distal end 73a2 in the axial direction (Z direction) and another seal convex portion group (fourth seal convex portion group 73G4) adjacent to the arbitrary seal convex portion 73a in the rotational axis direction (Z direction) are configured. The position of the end 73c1 on the near side of the seal projection 73c to be matched is the same. In other words, as described above, in the diaper 1 manufacturing apparatus, the interval between the seal projections 73 and 73 adjacent in the rotation axis direction (Z direction) is the rotation of the seal projection 73 as shown in FIG. This is the length in the axial direction (Z direction). Accordingly, when viewed from the conveyance direction (I direction), the second seal convex portion group 73G2 is disposed between the seal convex portions 73 and 73 adjacent to each other in the rotation axis direction (Z direction) constituting the first seal convex portion group 73G1. 1 seal convex part 73, one seal convex part 73 of the 3rd seal convex part group 73G3, and one seal convex part 73 of the 4th seal convex part group 73G4, and there is no gap in the direction of a rotation axis, and They are perfectly matched without overlapping.

  Moreover, in the manufacturing apparatus of the diaper 1, the anvil 71 is provided with the suction hole (not shown) which hold | maintains the continuous body 11C of the laminated | stacked exterior body 11 mentioned later on this outer peripheral surface on this outer peripheral surface. The suction hole (not shown) is connected to a suction machine (not shown) arranged outside the sealing device 7, and the suction machine (not shown) is sucked by a control means (not shown) provided in the sealing device 7. Is controlled.

  As shown in FIG. 3, the ultrasonic horn 72, which is an example of a press member, is disposed to face a block 74 attached to the outer peripheral surface of the anvil 71. In the manufacturing apparatus of the diaper 1, one ultrasonic horn 72 is arranged facing the outer peripheral surface of the anvil 71 including the five blocks 74, but a plurality of ultrasonic horns 72 may be arranged. The ultrasonic horn 72 is formed by fixing a horn portion 721 to a converter 723 via a booster 722. The length of the horn portion 721 in the rotation axis direction (Z direction) is substantially the same as the length of each block 74 in the rotation axis direction (Z direction). It is longer than the length in the direction (Z direction) orthogonal to the transport direction (I direction). The overlapped continuous body 11 </ b> C of the exterior body 11 is sandwiched between the seal convex part 73 of the block 74 on the outer peripheral surface of the anvil 71 and the horn part 721 of the ultrasonic horn 72, and the sandwiched part is from the converter 723 to the booster 722. Is sealed by the ultrasonic vibration transmitted to the horn part 721 via the, thereby forming a seal region ST. Further, the surface of the horn portion 721 facing the anvil 71 has all the seal convexities of the first seal convex portion group 73G1, the second seal convex portion group 73G2, the third seal convex portion group 73G3, and the fourth seal convex portion group 73G4. It has a flat shape so that it can be clamped with the portion 73.

  In the manufacturing apparatus of the diaper 1, the sealing device 7 includes a suction nozzle 75 at a position downstream of the ultrasonic horn 72 as shown in FIG. Preferably, a suction nozzle 75 is provided at a position downstream of the conveying direction (I direction) in the horn portion 721 of each ultrasonic horn 72. The suction nozzle 75 is connected to a suction machine (not shown) arranged outside the sealing device 7, and the suction force of the suction machine (not shown) is controlled by control means (not shown) provided in the sealing device 7. ing. Accordingly, fiber scraps constituting the exterior body 11 that easily adhere to the horn portion 721 can be sucked by the suction nozzle 75 and removed outside the sealing device 7.

An embodiment of a manufacturing method for manufacturing the pants-type disposable diaper 1 using the manufacturing apparatus having the sealing device 7 described above will be described.
The manufacturing method of the diaper 1 is overlapped after the continuous body 11C of the exterior body 11 is overlapped so that both side portions 11S and 11S in the transport direction (I direction) of the continuous body 11C of the exterior body 11 overlap. A sealing step of sealing the continuous body 11C of the outer package 11 to form a seal region ST is provided. The sealing step is performed using the above-described anvil 71 that is rotationally driven and the above-described ultrasonic horn 72 that is disposed to face the outer peripheral surface of the anvil 71. Moreover, the manufacturing method of the diaper 1 is equipped with the isolation | separation process which isolate | separates in the conveyance direction (I direction) of the seal | sticker area | region ST, and forms the side seal part S of the underpants type disposable diaper 1. FIG. The manufacturing method of the diaper 1 of this embodiment is a manufacturing method of a so-called cross-flow type pants-type disposable diaper as shown in FIG. Hereinafter, the manufacturing method of the diaper 1 of this embodiment is demonstrated suitably.

  First, as shown in FIG. 6, a strip-shaped outer layer sheet 12 continuously supplied from an original fabric roll (not shown), and a strip-shaped inner layer sheet 13 continuously supplied from an original fabric roll (not shown) The waist elastic member 14 that forms the waist gather, the waist elastic member 15 that forms the waist gather, and the leg elastic member 16 that forms the leg gather are each stretched in a stretched state. Distribute several. At this time, in this embodiment, the hot melt adhesive is continuously or intermittently applied to the waist elastic member 14 and the waist elastic member 15 via an adhesive application machine (not shown). The leg elastic member 16 is disposed while forming a predetermined leg-circumferential pattern via a known swing guide (not shown) that reciprocates perpendicular to the sheet flow direction. In addition, the belt-like outer layer sheet 12 and the belt-like inner layer sheet 13 are hot-melted with an adhesive coating machine (not shown) on one or both opposing surfaces of both sheets before they are overlapped. A mold adhesive is applied, and in this embodiment, a region including a region corresponding to a seal region ST described later (a region wider than the length of the seal region ST in the transport direction) and an absorbent main body described later A hot-melt adhesive is added intermittently to an area corresponding to a portion where 10 is disposed by an adhesive coating machine (not shown).

  And as shown in FIG. 6, between the pair of nip rolls 9, 9, a belt-shaped outer layer sheet 12 in which a waist elastic member 14, a waistline elastic member 15 and a leg elastic member 16 are sandwiched in an expanded state, and a belt-shaped outer layer sheet 12 By feeding and pressurizing the inner layer sheet 13, a continuous body 11 </ b> C of the exterior body 11 in which a plurality of elastic members 14, 15, 16 are arranged in an expanded state between the belt-like sheets 12, 13 is formed (of the exterior body 11 Continuum forming step). Thereafter, in the present embodiment, a plurality of waistline elastic members 15 and a plurality of leg elastic portions are used by using elastic member precut means (not shown) so as to correspond to positions where the absorbent main body 10 described later is disposed. The member 16 is pressed and divided into a plurality of pieces so that the contraction function is not expressed. Examples of the elastic member precut means (not shown) include an elastic member dividing portion used in the method for manufacturing a composite elastic member described in JP-A-2002-253605.

  Next, as shown in FIG. 6, an adhesive such as a hot-melt adhesive is applied in advance to the absorbent main body 10 manufactured in a separate process, rotated 90 degrees, and on the inner layer sheet 13 of the continuous body of the exterior body 11. It is intermittently supplied and fixed to form a diaper 1 continuous body (a continuous body of worn articles) 100 (arrangement step of absorbent main body). Hereinafter, the continuous body in which the absorbent main body 10 is fixed to the continuous body 11 </ b> C of the exterior body 11 is also referred to as the continuous body 100 of the diaper 1. Note that the hot melt adhesive for fixing may be applied to the position where the absorbent main body 10 is arranged in the inner layer sheet 13 instead of the absorbent main body 10 and supplied and fixed.

  Next, as shown in FIG. 6, a leg hole LO ′ is formed inside the annular portion surrounded by the leg elastic member 16 in the continuous body 11 </ b> C of the exterior body 11 in which the absorbent main body 10 is disposed (legs). Hole formation process). The leg hole forming step is conventionally performed using a method similar to the method in the manufacturing method of this type of article such as a rotary cutter and a laser cutter. In this embodiment, the leg hole forming step is provided after the absorbent body arranging step, but the leg hole forming step may be provided immediately before the absorbent main body 10 arranging step.

  Next, as shown in FIG. 6, overlapping is performed so that both side portions 11 </ b> S and 11 </ b> S in the transport direction (I direction) of the continuous body 11 </ b> C of the exterior body 11 overlap (overlapping process). In the superimposing step of the present embodiment, after the both end portions 11S and 11S of the continuous body 11C of the exterior body 11 are folded so that both ends in the longitudinal direction (X direction) of the absorbent main body 10 are folded, the exterior The continuous body 11C of the body 11 and the absorbent main body 10 are folded in two.

  Next, the seal region ST is formed in the continuous body 11C of the overlaid exterior body 11 by using the sealing device 7 included in the manufacturing apparatus (sealing process). In the sealing process of this embodiment, as shown in FIG. 3, between the above-described anvil 71 that is rotationally driven included in the sealing device 7 and the above-described ultrasonic horn 72 that is disposed opposite to the outer peripheral surface of the anvil 71. Then, the continuous body 11C of the packaged outer body 11 is conveyed. In addition, the continuous body 11C of the outer body 11 is held on the outer peripheral surface by a suction machine (not shown) of the anvil 71, and the anvil 71 rotates to make the tension in the transport direction of the continuous body 11C of the outer body 11 constant. However, the continuous body 11C (the continuous body 100 of the diaper 1) of the exterior body 11 is conveyed.

  Then, as shown in FIG. 4, the overlapped continuous body 11 </ b> C (the continuous body 100 of the diaper 1) is joined to the two rows of seal convex portions 73 and 73 of the block 74 of the anvil 71 and the ultrasonic horn 72. The outer layer sheet 12 and the inner layer sheet 13 of the sandwiched part are sealed by ultrasonic vibration transmitted from the converter 723 to the horn part 721 via the booster 722, and the sealing region ST is sealed. Form (see FIG. 7). More preferably, as shown in FIG. 6 and FIG. 7, the absorbent main bodies 10, 10 adjacent to each other in the transport direction (I direction) in the continuous body 11 </ b> C (the continuous body 100 of the diaper 1) of the packaged outer body 11. A plurality of seal convex portions 73 constituting the first seal convex portion group 73G1 of the upstream block 74U included in the anvil 71 and a second seal convex portion group 73G2 of the upstream block 74U are provided at every other central portion. The upstream seal region ST1 is formed by sandwiching between a plurality of seal convex portions 73 and the horn portion 721 of the ultrasonic horn 72 and sealing by ultrasonic vibration.

  Next, the anvil 71 is rotated, and the continuous body 11C of the exterior body 11 (the continuous body 100 of the diaper 1) is transported while the tension in the transport direction of the continuous body 11C of the exterior body 11 is constant. 6 and 7, the absorption adjacent to the transport direction (I direction) in the continuous body 11C (the continuous body 100 of the diaper 1) of the overlapped outer package 11 except for the upstream seal region ST1. A plurality of seal convex portions 73 constituting a third seal convex portion group 73G3 of the downstream block 74D provided in the anvil 71 and a fourth seal convex portion group of the downstream block 74D at the substantially central portion between the sex main bodies 10, 10. The plurality of seal convex portions 73 constituting 73G4 and the horn portion 721 of the ultrasonic horn 72 are sandwiched and sealed by ultrasonic vibration to form the downstream seal region ST2. The upstream-side seal region ST1 and the downstream-side seal region ST2 are formed at substantially the center of the absorbent main bodies 10 and 10 adjacent to each other in the transport direction (I direction) in the continuous body 11C (the continuous body 100 of the diaper 1) of the exterior body 11. Are alternately formed.

  Here, as shown in FIG. 5, the sealing device 7 used in the sealing process of the present embodiment relates to the anvil 71, and the seal convex portion group provided with the two blocks 74 and 74 adjacent in the transport direction (I direction). The seal convex portions 73 constituting 73G are arranged with different phases in the rotation axis direction (Z direction). As described above, in the manufacturing apparatus for the diaper 1, the seal projections 73 included in the four rows of seal projections 73G included in the two blocks 74 and 74 adjacent to each other in the transport direction (I direction) are the rotation axes. The phases are different from each other in the direction (Z direction). Preferably, in the sealing device 7, a plurality of seal convex portions 73 constituting the first seal convex portion group 73G1 of the upstream block 74U and a plurality of second seal convex portions 73G2 of the upstream block 74U are included. The plurality of seal protrusions 73, the plurality of seal protrusions 73 constituting the third seal protrusion portion group 73G3 included in the downstream block 74D, and the plurality of seals included in the fourth seal protrusion group 73G4 included in the downstream block 74D. The convex portions 73 are arranged with phases different from each other in the rotation axis direction (Z direction). As shown in FIG. 5, a plurality of seal convex portions 73 are continuously arranged when the entire seal convex portion group 73 </ b> G of the block 74 is viewed from the conveyance direction (I direction). Preferably, in the sealing device 7, a plurality of seal convex portions 73 constituting the first seal convex portion group 73G1 of the upstream block 74U and a plurality of seals constituting the second seal convex portion group 73G2 of the upstream block 74U. The convex portion 73, the plurality of seal convex portions 73 constituting the third seal convex portion group 73G3 of the downstream block 74D, and the plurality of seal convex portions 73 constituting the fourth seal convex portion group 73G4 of the downstream block 74D. When viewed from the transport direction (I direction), the seal convex portion 73 of the first seal convex portion group 73G1, the seal convex portion 73 of the second seal convex portion group 73G2, and the seal convex portion of the third seal convex portion group 73G3. 73 and the seal protrusions 73 of the fourth seal protrusion group 73G4 are arranged without gaps without gaps, and continuously so as to form a virtual continuous line extending in the rotation axis direction (Z direction). Yes. Thus, as viewed from the transport direction (I direction), the plurality of seal protrusions 73 are arranged without gaps in the direction of the rotation axis, so that the plurality of seals of the block 74 included in the anvil 71 is provided. When the ultrasonic horn 72 is focused when sandwiched between the convex portion 73 and the horn portion 721 of the ultrasonic horn 72 and sealed by ultrasonic vibration, the facing surface of the horn portion 721 with the anvil 71 is It abuts on the seal convex portion 73 of the block 74 without any gap in the axial direction (Z direction). Accordingly, the rotation of the anvil 71 is unlikely to cause wear on the horn portion 721 of the ultrasonic horn 72, and the seal strength can be secured stably for a long period of time, thereby improving the production efficiency.

  In particular, as shown in FIG. 5, the sealing device 7 used in the sealing process of the present embodiment is an arbitrary one constituting one seal convex portion group 73G (for example, the first seal convex portion group 73G1) with respect to the anvil 71. When paying attention to the two seal projections 73a, the positions of both ends 73a1 and 73a2 in the axial direction (Z direction) of any seal projection 73a and any seal projection as viewed from the transport direction (I direction) Positions of ends 73b1 and 73c1 of seal convex portions 73b and 73c constituting another seal convex portion group (second seal convex portion group 73G2 and fourth seal convex portion group 73G4) adjacent to 73a in the axial direction (Z direction) And are consistent. For this reason, the horn portion 721 of the ultrasonic horn 72 is unlikely to be worn further, and the seal strength can be secured stably for a long period of time, and the production efficiency is further improved.

  Further, as shown in FIG. 4, the sealing device 7 used in the sealing process of the present embodiment includes a suction nozzle 75 at a position downstream of the ultrasonic horn 72. Therefore, the adhesive debris that is easily attached to the horn portion 721 of the ultrasonic horn 72 can be sucked by the suction nozzle 75 and removed from the production line. In this way, the sealing device 7 is very easy to maintain and the production efficiency is improved.

  Thereafter, the pants-type disposable diaper 1 having the side seal portion S is formed by being cut off at the seal region ST (upstream seal region ST1 and downstream seal region ST2) (separation step). In the separation step, the anvil 71 is rotated to make the tension in the transport direction of the continuous body 11C of the exterior body 11 constant, and the continuous body 11C of the exterior body 11 (the continuous body 100 of the diaper 1) is replaced with a cutter blade (not shown). ) And a receiving block (not shown) disposed on the outer peripheral surface of the anvil 71. Then, the cutter blade (not shown) and the receiving block (not shown) seal the first seal convex portion group 73G1 of the upstream block 74U, in other words, the substantially central position in the transport direction (I direction) in the upstream seal region ST1. One row of seals separated along the axial direction (Z direction) at a position between the two rows of seal portion groups 17G formed by the convex portions 73 and the seal convex portions 73 of the second seal convex portion group 73G2. One side seal part S of the pants-type disposable diaper 1 having the group 17G is formed. Then, by rotating the anvil 71, two rows of seal portion groups 17G formed by the seal convex portions 73 of the third seal convex portion group 73G3 and the seal convex portions 73 of the fourth seal convex portion group 73G4 of the downstream block 74D. The pants-type disposable diaper 1 having a pair of side seal portions S, S each having a single row of seal portion groups 17G is formed by cutting along the axial direction (Z direction).

  Here, regarding the upstream block 74U and the downstream block 74D, as shown in FIG. 5, the plurality of seal protrusions 73 constituting the first seal protrusion group 73G1 are viewed in the transport direction (I direction). Position, positions of the plurality of seal projections 73 constituting the second seal projection group 73G2, positions of the plurality of seal projections 73 constituting the third seal projection group 73G3, and fourth seal projections The positions of the plurality of seal convex portions 73 constituting the group 73G4 are different. And the seal convex part 73 extended in parallel with a conveyance direction (I direction) respond | corresponds to the seal part 17 of the diaper 1. FIG. Therefore, the seal part groups 17G and 17G included in the pair of side seal parts S and S of the disposable diaper 1 to be manufactured are configured so that the phases of the seal parts 17 constituting the diaper are different in the longitudinal direction (X direction). Become.

  As shown in FIG. 1, the disposable diaper 1 manufactured as described above has each side seal portion S having a seal portion 17 extending in parallel to the lateral direction (Y direction) of the diaper. Each side seal portion S has a row of seal portion groups 17G in which the seal portions 17 are arranged at the same pitch in the longitudinal direction (X direction) of the diaper. Therefore, it is easy to peel off the joining of the side seal portion S at the time of undressing. Moreover, the phase of the seal part 17 which comprises the seal part groups 17G and 17G which a pair of side seal part S and S has differs in the vertical direction (X direction) of a diaper. Therefore, the side seal portion S is not easily torn during wearing, and the side seal portion S is easily peeled off during undressing. Therefore, the diaper 1 has an improved usability as a whole.

  According to the manufacturing apparatus including the sealing device 7 of the present embodiment and the manufacturing method of the present embodiment using the manufacturing apparatus, the disposable diaper 1 having the above-described effects can be continuously manufactured with high production efficiency. .

As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment.
For example, as shown in FIG. 5, the sealing device 7 included in the manufacturing apparatus of the present embodiment described above is an arbitrary one that forms one seal convex portion group 73G (for example, the first seal convex portion group 73G1) with respect to the anvil 71. When attention is paid to the two seal projections 73a, the positions of both ends 73a1 and 73a2 in the rotation axis direction (Z direction) of the arbitrary seal projection 73a and any seal projection as viewed from the transport direction (I direction) Ends 73b1 and 73c1 of seal convex portions 73b and 73c constituting another seal convex portion group (second seal convex portion group 73G2 and fourth seal convex portion group 73G4) adjacent to the portion 73a in the rotation axis direction (Z direction) Matches the position of. That is, when viewed from the conveyance direction (I direction), the second seal convex portion group 73G2 is disposed between the seal convex portions 73 and 73 adjacent to each other in the rotation axis direction (Z direction) constituting the first seal convex portion group 73G1. The one seal convex portion 73, the one seal convex portion 73 of the third seal convex portion group 73G3, and the one seal convex portion 73 of the fourth seal convex portion group 73G4 are completely aligned with no gap. It is arranged. However, when the entire seal convex portion group 73G of the block 74 is viewed from the conveyance direction (I direction), the gaps are formed so that the plurality of seal convex portions 73 form a virtual continuous line extending in the rotation axis direction (Z direction). As long as they are arranged, the seal convex part 73 of the first seal convex part group 73G1, the seal convex part 73 of the second seal convex part group 73G2, and the third seal convex part when viewed from the transport direction (I direction) There may be an overlap between the seal projection 73 of the group 73G3 and the seal projection 73 of the fourth seal projection group 73G4.

  In addition, in the sealing device 7 included in the manufacturing apparatus of the present embodiment described above, each block 74 includes two rows of seal convex portions 73G, but may be one row. Even in such a case, the seal convex portions 73 included in the seal convex portion group 73G provided in the two blocks 74 and 74 adjacent to each other in the transport direction (I direction) are arranged in different phases in the axial direction. As seen from above, the plurality of seal projections 73 are arranged without gaps in the direction of the rotation axis.

Further, as shown in FIG. 4, the sealing device 7 included in the manufacturing apparatus of the present embodiment described above includes four rows of seal convex portions 73 </ b> G included in the two blocks 74 and 74 adjacent to each other in the transport direction (I direction). The seal projections 73 are arranged without gaps in the rotation axis direction, but are not limited to the two blocks 74 and 74 adjacent to each other in the transport direction (I direction), but all the blocks 74 ( In the sealing device 7, it is only necessary that the seal projections 73 of the five blocks 74) are arranged without any gap in the direction of the rotation axis.
Further, the anvil 71 provided in the sealing device 7 may have a shape other than the roll shape, and may be any shape as long as the shape is rotatable.

Moreover, although the sealing apparatus 7 with which the manufacturing apparatus of this embodiment mentioned above was using the ultrasonic horn as a press member, if it is heat-sealing, it will not be restricted to an ultrasonic wave.
Further, in the pants-type disposable diaper manufactured by the manufacturing apparatus of the above-described embodiment, the exterior body 11 is configured by an integral sheet from the ventral region to the dorsal region. Is divided into a ventral region exterior body located on the back side and a back side region exterior body located on the back side, and the absorbent main body 10 is bridged over the ventral region exterior body and the back side region exterior body. It may be a fixed configuration. In this case, the “both side portions 11S and 11S in the transport direction (I direction) of the continuous body 11C of the exterior body 11” disposed so as to overlap in the above-described overlapping step refers to one side portion of the ventral region exterior body. And corresponding to one side of the dorsal region exterior body.

  The following pants-type disposable diaper manufacturing apparatus is disclosed with respect to the embodiment described above.

<1>
A pair of side seals by joining the both side edges of the ventral region and the back region of the exterior body fixed to the non-skin facing surface side of the vertically long absorbent main body having a liquid-retaining absorbent body together A pants-type disposable diaper manufacturing apparatus in which a part is formed,
With respect to the pants-type disposable diaper, each of the side seal portions includes a group of seal portions in which seal portions extending in parallel to the lateral direction of the diaper are arranged at the same pitch in the longitudinal direction of the diaper, The seal part groups that the seal part has are different in the longitudinal direction of the diaper, and the phase of the seal part constituting the diaper is different,
The manufacturing apparatus includes an anvil that is driven to rotate, and a press member that sandwiches a continuous body of the exterior body that is disposed to be opposed to the outer peripheral surface of the anvil and forms a seal region with the anvil.
The anvil includes a plurality of blocks having seal convex portions on the outer peripheral surface extending in parallel with the conveying direction of the continuous body and seal convex portions corresponding to the seal portions arranged at the same pitch in the rotation axis direction. ,
The seal convex portions constituting the seal convex portion group included in the two blocks adjacent to each other in the transport direction are arranged with different phases in the rotation axis direction,
The manufacturing apparatus of the underpants type disposable diaper which sees from the said conveyance direction, and the said seal convex part which all the said blocks with which the said anvil was equipped is distribute | arranged without the clearance gap in the said rotating shaft direction.

<2>
Each of the blocks included in the anvil has two rows of the seal projection group in the transport direction,
The seal projections of the four rows of seal projections of the two blocks adjacent to each other in the transport direction are arranged with different phases in the axial direction,
The pants-type disposable according to <1>, wherein the seal convex portions of the four rows of seal convex portions of the two blocks are arranged without gaps in the rotation axis direction as viewed from the transport direction. Diaper manufacturing equipment.
<3>
The apparatus for manufacturing a pants-type disposable diaper according to <2>, wherein an interval between the seal projections adjacent in the rotation axis direction is three times the length of the seal projection in the rotation axis direction.
<4>
When paying attention to any one of the seal convex portions constituting one seal convex portion group, the positions of both ends of the arbitrary seal convex portions in the rotational axis direction, as viewed from the rotational conveyance direction, The position of the end of the seal projection in the rotation axis direction of the seal projection that constitutes another seal projection group adjacent to the arbitrary seal projection in the rotation axis direction is the same <1> to The manufacturing apparatus of the underpants type disposable diaper any one of <3>.
<5>
The manufacturing apparatus of the underpants type disposable diaper any one of said <1>-<4> provided with the suction nozzle in the position of the downstream of the said press member.
<6>
The said seal convex part is a manufacturing apparatus of the underpants type disposable diaper any one of said <1>-<5> currently formed in the rectangular shape long in the said conveyance direction.
<7>
Any one of the above <1> to <6>, wherein the seal convex portion group is formed by intermittently arranging the seal convex portions extending parallel to the transport direction at the same pitch in the rotation axis direction. The manufacturing apparatus of the underpants type disposable diaper described in 1.

<8>
The pants-type disposable diaper includes a vertically long absorbent main body and an exterior body that fixes the absorbent main body.
The pants according to any one of <1> to <7>, wherein the anvil has a length in a rotation axis direction longer than a length in a direction orthogonal to a conveyance direction of the continuous body of the exterior body. Type disposable diaper manufacturing equipment.
<9>
The pants-type disposable diaper includes a vertically long absorbent main body and an exterior body that fixes the absorbent main body.
The length of the said rotation axis direction of the said block is longer than the length of the direction orthogonal to the conveyance direction of the continuous body of an exterior body, The underpants type disposable as described in any one of said <1>-<8> Diaper manufacturing equipment.
<10>
The pants-type disposable diaper includes a vertically long absorbent main body and an exterior body that fixes the absorbent main body.
The press member is an ultrasonic horn, and the ultrasonic horn is formed by fixing a horn portion to a converter via a booster,
The length of the horn portion in the direction of the rotation axis is substantially the same as the length of the block in the direction of the rotation axis, and is longer than the length in the direction perpendicular to the transport direction of the continuous body of the exterior body. The manufacturing apparatus of the underpants type disposable diaper any one of said <1>-<9>.
<11>
In the seal part group, the longitudinal pitch P of the pants-type disposable diaper between the seal parts is 0.5 mm or more, preferably 1.5 mm or more, and 10 mm or less, preferably 5 mm or less. 1>-<10> The manufacturing apparatus of the underpants type disposable diaper any one of.
<12>
The seal portion is formed in a rectangular shape that is long in the lateral direction,
With respect to the longitudinal direction of the seal part, it is 0.1 mm or more, preferably 0.3 mm or more, 2.5 mm or less, preferably 2.0 mm or less, according to any one of the above items <1> to <11>. Pants-type disposable diaper manufacturing equipment.
<13>
The seal portion is formed in a rectangular shape that is long in the lateral direction,
The underpants type according to any one of the above items <1> to <12>, which is 0.5 mm or more, preferably 1.5 mm or more, and 10 mm or less, preferably 5.0 mm or less with respect to the lateral direction of the seal portion. Disposable diaper manufacturing equipment.
<14>
<1> to <13>, wherein the seal portions are 3/30 mm or more, preferably 6/30 mm or more, and 60/30 mm or less, preferably 20/30 mm or less in the longitudinal direction. The manufacturing apparatus of the underpants type disposable diaper any one of these.
<15>
The pants-type disposable diaper according to any one of the above items <1> to <14>, wherein the pitch P is equal in length in the lateral direction of the seal portion, or the pitch P is larger than the length in the lateral direction of the seal portion. Manufacturing equipment.

<16>
A pair of side seals by joining the both side edges of the ventral region and the back region of the exterior body fixed to the non-skin facing surface side of the vertically long absorbent main body having a liquid-retaining absorbent body together A method for manufacturing a pants-type disposable diaper in which a part is formed,
With respect to the pants-type disposable diaper, each of the side seal portions includes a group of seal portions in which seal portions extending in parallel to the lateral direction of the diaper are arranged at the same pitch in the longitudinal direction of the diaper, The seal part groups that the seal part has are different in the longitudinal direction of the diaper, and the phase of the seal part that constitutes the
In the manufacturing method, while the continuous body of the exterior body is transported and overlapped so that both side portions in the transport direction of the continuous body of the exterior body overlap each other, the overlapped continuous body of the exterior body is sealed and sealed A sealing step to form a region;
A separation step of forming the side seal portion of the pants-type disposable diaper by separating at a substantially central position in the transport direction of the seal region,
The sealing step is performed using an anvil that is rotationally driven and a press member that is disposed opposite to the outer peripheral surface of the anvil.
The anvil comprises a plurality of blocks having seal convex portions on the outer peripheral surface extending in parallel with the transport direction and having seal convex portions corresponding to the seal portions arranged at the same pitch in the rotation axis direction,
The seal convex portions constituting the seal convex portion group included in the two blocks adjacent to each other in the transport direction are arranged with different phases in the axial direction,
The manufacturing method of the underpants type disposable diaper which the said seal convex part which all the said blocks with which the said anvil was equipped has distribute | arranged without the clearance gap seeing from the said conveyance direction.

<17>
The pants-type disposable diaper according to <16>, wherein the seal projection group is formed by intermittently arranging the seal projections extending in parallel with the transport direction at the same pitch in the rotation axis direction. Production method.
<18>
The manufacture of the pants-type disposable diaper according to <16> or <17>, wherein the anvil has an axial length longer than a length in a direction orthogonal to a conveyance direction of the continuous body of the exterior body. Method.
<19>
The underpants type according to any one of <16> to <18>, wherein a length of the block in the rotation axis direction is longer than a length in a direction orthogonal to the transport direction of the continuous body of the exterior body. A manufacturing method for disposable diapers.

<20>
The press member is an ultrasonic horn, and the ultrasonic horn is formed by fixing a horn portion to a converter via a booster,
The length of the horn portion in the direction of the rotation axis is substantially the same as the length of the block in the direction of the rotation axis, and the length in the direction perpendicular to the transport direction of the continuous body of the overlaid body The manufacturing method of the underpants type disposable diaper any one of said <16>-<19> which is also long.
<21>
In the seal part group, the longitudinal pitch P of the pants-type disposable diaper between the seal parts is 0.5 mm or more, preferably 1.5 mm or more, and 10 mm or less, preferably 5 mm or less. The manufacturing method of the underpants type disposable diaper any one of 16>-<20>.
<22>
The seal portion is formed in a rectangular shape that is long in the lateral direction,
With respect to the longitudinal direction of the seal part, it is 0.1 mm or more, preferably 0.3 mm or more, 2.5 mm or less, preferably 2.0 mm or less, according to any one of the above items <16> to <21>. A manufacturing method for pants-type disposable diapers.
<23>
The seal portion is formed in a rectangular shape that is long in the lateral direction,
The pants type according to any one of <16> to <22>, wherein the horizontal direction of the seal portion is 0.5 mm or more, preferably 1.5 mm or more, 10 mm or less, preferably 5.0 mm or less. A manufacturing method for disposable diapers.
<24>
<16> to <23>, wherein the seal portions are 3/30 mm or more, preferably 6/30 mm or more, and 60/30 mm or less, preferably 20/30 mm or less in the longitudinal direction. The manufacturing method of the underpants type disposable diaper any one of these.
<25>
The pants-type disposable diaper according to any one of <16> to <24>, wherein the pitch P and the length of the seal portion in the lateral direction are equal, or the pitch P is greater than the length of the seal portion in the lateral direction. Manufacturing method.

DESCRIPTION OF SYMBOLS 1 Pants type disposable diaper S Side seal part WO Waist opening LO Leg opening 2 Top sheet 3 Back sheet 4 Absorber 5 Side cuff 10 Absorbent main body 11 Exterior body 12 Outer sheet 13 Inner sheet 14,15,16 Elastic member 17 Sealing part 17G Sealing part group 7 Sealing device 71 Anvil 711 Shaft center 72 Ultrasonic horn (press member)
721 Horn part 722 Booster 723 Converter 73 Seal convex part 73G Seal convex part group 74 Block 75 Suction nozzle

Claims (5)

A pair of side seals by joining the both side edges of the ventral region and the back region of the exterior body fixed to the non-skin facing surface side of the vertically long absorbent main body having a liquid-retaining absorbent body together A pants-type disposable diaper manufacturing apparatus in which a part is formed,
With respect to the pants-type disposable diaper, each of the side seal portions includes a group of seal portions in which seal portions extending in parallel to the lateral direction of the diaper are arranged at the same pitch in the longitudinal direction of the diaper, The seal part groups that the seal part has are different in the longitudinal direction of the diaper, and the phase of the seal part constituting the diaper is different,
The manufacturing apparatus includes an anvil that is driven to rotate, and a press member that sandwiches a continuous body of the exterior body that is disposed to be opposed to the outer peripheral surface of the anvil and forms a seal region with the anvil.
The anvil includes a plurality of blocks having seal convex portions on the outer peripheral surface extending in parallel with the conveying direction of the continuous body and seal convex portions corresponding to the seal portions arranged at the same pitch in the rotation axis direction. ,
The seal convex portions constituting the seal convex portion group included in the two blocks adjacent to each other in the transport direction are arranged with different phases in the rotation axis direction,
The manufacturing apparatus of the underpants type disposable diaper which sees from the said conveyance direction, and the said seal convex part which all the said blocks with which the said anvil was equipped is distribute | arranged without the clearance gap in the rotating shaft direction. Each of the blocks included in the anvil has two rows of the seal projection group in the transport direction,
The seal projections of the four rows of seal projections of the two blocks adjacent to each other in the transport direction are arranged with different phases in the axial direction,
2. The pants-type disposable diaper according to claim 1, wherein when viewed from the transport direction, the seal convex portions of the four rows of seal convex portions of the two blocks are arranged without a gap in the rotation axis direction. manufacturing device.   When paying attention to any one of the seal protrusions constituting one seal protrusion group, the positions of both ends of the arbitrary seal protrusions in the rotation axis direction, as viewed from the transport direction, 3. The pants according to claim 1, wherein a position of a terminal end of the seal convex portion constituting another seal convex portion group adjacent to the seal convex portion in the rotational axis direction coincides with the position of the end of the seal convex portion in the rotational axis direction. Type disposable diaper manufacturing equipment.   The manufacturing apparatus of the underpants type disposable diaper of any one of Claims 1-3 provided with the suction nozzle in the position of the downstream of the said press member. A pair of side seals by joining the both side edges of the ventral region and the back region of the exterior body fixed to the non-skin facing surface side of the vertically long absorbent main body having a liquid-retaining absorbent body together A method for manufacturing a pants-type disposable diaper in which a part is formed,
With respect to the pants-type disposable diaper, each of the side seal portions includes a group of seal portions in which seal portions extending in parallel to the lateral direction of the diaper are arranged at the same pitch in the longitudinal direction of the diaper, The seal part groups that the seal part has are different in the longitudinal direction of the diaper, and the phase of the seal part constituting the diaper is different,
In the manufacturing method, while the continuous body of the exterior body is transported and overlapped so that both side portions in the transport direction of the continuous body of the exterior body overlap each other, the overlapped continuous body of the exterior body is sealed and sealed A sealing step to form a region;
A separation step of forming the side seal portion of the pants-type disposable diaper by separating at a substantially central position in the transport direction of the seal region,
The sealing step is performed using an anvil that is rotationally driven and a press member that is disposed opposite to the outer peripheral surface of the anvil.
The anvil comprises a plurality of blocks having seal convex portions on the outer peripheral surface extending in parallel with the transport direction and having seal convex portions corresponding to the seal portions arranged at the same pitch in the rotation axis direction,
The seal convex portions constituting the seal convex portion group included in the two blocks adjacent to each other in the transport direction are arranged with different phases in the axial direction,
The manufacturing method of the underpants type disposable diaper which the said seal convex part which all the said blocks with which the said anvil was equipped has distribute | arranged without the clearance gap seeing from the said conveyance direction.

Images