JP2019077062A - Manufacturing device and manufacturing method of sheet fusion body - Google Patents

Abstract

To suppress generation of sheet missing when a sheet laminate is fused and cut.SOLUTION: A manufacturing device 20 of a sheet fusion body has a supporting member 21 for supporting a sheet laminate 10. A pressurization head 26 has: a pair of pressurization members 50a and 50b arranged at a positions corresponding to side part ranges 27a and 27b of an aperture 27 so as to expand in a same direction as a direction of the aperture 27 arranged in the supporting member 21, and pressurizing the sheet laminate 10 to the supporting member 21; and pressurization mechanisms 60a and 60b arranged in back faces of the pressurization members 50a and 50b and adding pressure force each independently to the pressurization members 50a and 50b. The pressurization head 26 is arranged at a position in an outer surface side in the supporting member 21.SELECTED DRAWING: Figure 7

Description

  The present invention relates to an apparatus and a method for producing a sheet fusion product.

  As a conventional technique related to joining of superposed sheets, for example, Patent Document 1 describes a sheet laminate in which a plurality of sheets are superposed, along the circumferential surface of a rotating roll having a laser light transmitting portion on the circumferential surface. A method is disclosed in which the sheet laminate is irradiated with a laser beam from the inside of the rotating roll while being deformed into a shape and conveyed to fuse the sheets in the sheet laminate. In the method described in the document, the sheet laminate is supported on a support member, and the sheet laminate is pressed toward the support member by a pressing member. The pressing member has a circulating endless track and a plurality of pressure members attached to the endless track.

  In Patent Document 2, in the method described in Patent Document 1, in place of the pressing member, a pressure head for pressing the sheet stack toward the support member is used. The pressure head includes a plurality of pressure parts arranged along the width direction of the sheet stack. The plurality of pressing units can individually control the pressing time for pressing the sheet stack. According to the method described in the document, there is an advantage that fusion can be performed successfully even if the number and thickness of the sheets constituting the sheet laminate are different.

JP, 2015-9505, A JP, 2016-64503, A

  In the techniques described in Patent Documents 1 and 2, while conveying the sheet laminate, the sheet laminate is pressed under a pair of positions before and after the longitudinal direction, and fusion and melting are performed at the positions in between It is carried out. Therefore, the sheet laminate is fused in a state where tension is applied along the transport direction. In this case, when the pressing force at the pair of pressing portions, which are positions before and after the portion to be fused, becomes unbalanced, immediately after the fusing and melting, the sheet laminate is pressed from the pressing portion on the weak pressing side. There is a risk of getting out.

  Accordingly, an object of the present invention is to provide an apparatus and a method for producing a sheet fusion product that can eliminate the drawbacks of the above-mentioned prior art.

The present invention is a manufacturing apparatus of a sheet fusion body having a seal edge fused in a state where the edges of a plurality of sheets overlap.
A support member having a first surface and a second surface opposite to the first surface and supporting a band-like sheet laminate on which a plurality of sheets including a resin material is overlapped at least partially on the first surface;
And a laser beam irradiation unit disposed on the second surface side of the support member and having a lens for condensing the laser beam.
The support member has a slit-like opening which is long in the width direction of the sheet laminate, through which laser light emitted from the second surface side can pass.
A pair of pressure members disposed at positions corresponding to side areas of the slit-like opening so as to extend in the same direction as the extending direction of the slit-like opening and pressing the sheet stack toward the support member; And a pressing head having a pressing mechanism disposed on the back surface of the pair of pressing members and independently applying a pressing force to the pressing members, disposed at a position on the first surface side of the support member. An apparatus for producing a sheet fusion-bonded body is provided.

The present invention is also a manufacturing apparatus of a sheet fusion body having a seal edge fused in a state where the edges of a plurality of sheets overlap.
A support member having a first surface and a second surface opposite to the first surface and supporting a band-like sheet laminate on which a plurality of sheets including a resin material is overlapped at least partially on the first surface;
And a laser beam irradiation unit disposed on the second surface side of the support member and having a lens for condensing the laser beam.
The support member has a slit-like opening which is long in the width direction of the sheet laminate, through which laser light emitted from the second surface side can pass.
A pressure head for pressing the sheet stack toward the support member at a position corresponding to the slit-like opening is disposed at a position on the first surface side of the support member.
The support member has a pair of support-side pressing members disposed in the side area of the opening so as to extend in the same direction as the direction in which the slit-like opening extends.
The pair of support-side pressing members provide a manufacturing apparatus of a sheet fusion-bonded body in which application of a pressing force is possible independently of each other.

Furthermore, the present invention is a method for producing a sheet fusion body having a seal edge fused in a state where the edges of a plurality of sheets overlap.
Supporting a band-like sheet laminate in which a plurality of sheets including a resin material is overlapped at least in part on a first surface of a support member having a first surface and a second surface opposite to the first surface;
A lens disposed on the second surface side of the support member and pressing the laser light under a state in which the sheet stack is pressed toward the support member along the width direction by a pressure head; The laser beam is irradiated from the laser beam irradiating portion toward the sheet laminate supported on the first surface of the support member to simultaneously divide the sheet laminate across the width direction. And fusing the edges of the sheet in an overlapping state to produce a sheet fused body having the seal edge,
It is an object of the present invention to provide a method for producing a sheet fused body, wherein pressing in the width direction of the sheet laminate is performed independently at a pair of positions in the longitudinal direction.

  According to the present invention, it is possible to suppress the bias of the pressing force along the conveyance direction of the sheet laminate, and to thereby suppress the occurrence of sheet omission when the sheet laminate is melted and cut.

FIG. 1 is a perspective view schematically showing a pants-type disposable diaper as an example of a sheet fusion-bonded body produced according to the present invention. FIG. 2 is a cross-sectional view schematically showing a cross section taken along line I-I of FIG. FIG. 3 is a plan view schematically showing a developed and stretched state of the diaper shown in FIG. FIG. 4: is a perspective view which shows typically the manufacturing process of the diaper continuous body in the manufacturing process of the diaper shown in FIG. FIG. 5: is one Embodiment of the manufacturing apparatus of the sheet | seat fusion-fusion body of this invention, and is a perspective view which shows typically the laser type joining apparatus used as a manufacturing apparatus of a underpants-type disposable diaper. FIG. 6 is a perspective view showing a pressing portion support member in the apparatus shown in FIG. FIG. 7 is a front view showing a pressure head in the device shown in FIG. FIG. 8 is a side view showing a pressure head in the device shown in FIG. FIG. 9 is an enlarged sectional view of an essential part of a pressure head and a support member in the apparatus shown in FIG. FIG. 10 is a cross-sectional view schematically showing a structure of a cross section passing through the rotation axis of the support member in the device shown in FIG. FIG. 11 is a perspective view showing a pressure state of the sheet laminate using the pressure head in the apparatus shown in FIG. FIG. 12 is an enlarged sectional view of an essential part of the pressurized state shown in FIG. FIGS. 13 (a) and 13 (b) are enlarged cross-sectional views (corresponding to FIG. 9) of principal parts of a pressure head and a support member in another embodiment of the present invention, respectively. Fig.14 (a) and FIG.14 (b) are principal part expanded sectional views which respectively show another embodiment of the press part support member in another embodiment of this invention.

  The present invention will be described based on its preferred embodiments with reference to the drawings. In the following embodiment, a pair of sheet fusion bodies, which is an object to be manufactured according to the present invention, has a sealing edge fused in a state where the edges of a plurality of sheets overlap. The present invention will be described by taking a pants-type disposable diaper having an exterior body having a side seal portion as an example.

  1 to 3 show a pants-type disposable diaper 1 manufactured according to the present invention. The diaper 1 includes the absorbent main body 2 and the exterior body 3 disposed on the non-skin facing surface side of the absorbent main body 2 and fixing the absorbent main body 2, and in the front body F (abdominal side 1A) The left and right side edges A1, A1 along the longitudinal direction X of the exterior body 3 and the left and right side edges B1, B1 along the longitudinal direction X of the exterior body 3 at the back body R (back side 1B) are joined together Side seal portions 4, 4, a waist opening 8 and a pair of leg openings 9, 9 are formed. The exterior body 3 forms the outer surface of the diaper 1.

  The diaper 1 has a longitudinal direction X corresponding to the front-rear direction of the wearer and a transverse direction Y orthogonal to the longitudinal direction in a plan view in the unfolded and stretched state as shown in FIG. The diaper 1 can be divided into a crotch portion 1C which is disposed in the crotch portion of the wearer when worn, and a ventral side portion 1A and a dorsal side portion 1B which are positioned in front and rear of the longitudinal direction X thereof. The exterior body 3 in the crotch portion 1C is formed with recessed and recessed portions for forming the leg openings 9 and 9 at the left and right side edge portions along the longitudinal direction X thereof. In addition, as shown in FIG. 3, the diaper 1 can be divided into a front body F and a back body R at the boundary of a virtual center line CL extending in the horizontal direction Y that divides the diaper 1 in the longitudinal direction X.

  As shown in FIG. 3, the absorbent main body 2 has a longitudinally long shape relatively long in one direction (longitudinal direction X), and forms a surface sheet 2 a forming a skin opposing surface and a non-skin opposing surface And a liquid-retaining absorbent 2c interposed between the two sheets, and the absorbent 2c has a shape that is long in the same direction as the longitudinal direction X. The absorbent main body 2 is bonded to the central portion of the exterior body 3 by a known bonding means (adhesive or the like), with the longitudinal direction thereof aligned with the longitudinal direction X of the diaper 1 in the unfolded and stretched state.

  The exterior body 3 is disposed on the inner surface side of the outer layer sheet 31 forming the outer surface (the non-skin facing surface of the exterior body 3) of the diaper 1 as shown in FIGS. An inner layer sheet 32 forming the inner surface (skin facing surface of the exterior body 3), and a plurality of thread-like or strip-like elastic members 5, 6, 7 fixed by an adhesive between the two sheets 31, 32 It is done. Thus, the exterior body 3 is a sheet laminate having a configuration in which a plurality of sheets are stacked. In the diaper 1, the exterior body 3 which is a sheet laminate includes a plurality of sheets (the outer layer sheet 31 and the inner layer sheet 32) and the elastic members 5, 6, 7 as constituent members. Further, in the diaper 1, the outer layer sheet 31 and the inner layer sheet 32 are joined at a predetermined site by an adhesive, a heat seal or the like (not shown).

  At least a part of the outer layer sheet 31 and the inner layer sheet 32 constituting the outer package 3 contains a resin material, and in the diaper 1, the outer layer sheet 31 and the inner layer sheet 32 are formed mainly of a resin material There is. Examples of the outer layer sheet 31 and the inner layer sheet 32 constituting the outer package 3 include a heat-sealable synthetic resin such as polyethylene, polyethylene terephthalate, polypropylene as a resin material, and a nonwoven fabric, a film, and a laminate sheet of nonwoven fabric and film And the like. Examples of the non-woven fabric include an air through non-woven fabric, a heat roll non-woven fabric, a spunlace non-woven fabric, a spunbond non-woven fabric, and a meltblown non-woven fabric.

  As shown in FIG. 2, the pair of side seal parts 4 and 4 in the diaper 1 has the edge of the exterior body 3 in the front body F and the edge of the exterior body 3 in the rear body R It has a sealing edge 41 joined by a continuous linear fusion 40 extending in the direction. The seal edge 41 in the diaper 1 is formed continuously over the entire length between the waist opening 8 and the leg opening 9 in each of the side seals 4, 4. In the fused portion 40 at the seal edge portion 41, the constituent resin of the sheets is melted and solidified in a state where the edge portions of a plurality of sheets (the outer layer sheet 31 and the inner layer sheet 32) constituting the outer package 3 overlap. It is formed.

  The pants-type disposable diaper 1 having the above configuration, as shown in FIG. 4, includes a process of manufacturing a diaper continuous body 10A configured to include a band-like sheet laminate 10, and a manufacturing apparatus of a sheet fusion-bonded body of the present invention. The laser type joining apparatus 20 shown in FIG. 5 which is one embodiment can be manufactured by a manufacturing method including the step of dividing the diaper continuous body 10A into individual diapers 1 by melting. The diaper continuous body 10A has a configuration in which a plurality of disposable diapers 1 are connected, and more specifically, a precursor of a pants-type disposable diaper in which the side seal portion 4 is not formed is connected in one direction. It is done. In order to manufacture the pants-type disposable diaper 1, using the apparatus for manufacturing a pants-type disposable diaper provided with the laser bonding apparatus 20 shown in FIG. 5, which is an embodiment of the apparatus for manufacturing a sheet fusion-bonded body of the present invention it can.

  Thus, the apparatus for manufacturing a fusion-bonded sheet according to the present invention melts and cuts the band-like sheet laminate 10, in which a plurality of sheets are stacked, in the width direction at a predetermined pitch, thereby forming the edges of the plurality of sheets. A sheet fused body having a seal edge fused in a state in which parts overlap is produced. In the apparatus and method of the present embodiment, the continuous exterior body in the configuration in which the exterior bodies 3 of the individual disposable diapers are continuous in the flow direction is the strip sheet laminate 10 that is the target of melting and cutting; The body 10A has a configuration in which the absorbent main body 2 is intermittently arranged in the flow direction at predetermined intervals in the band-like sheet laminate 10. And sheet lamination was shortened by melting the beltlike sheet laminate 10 in which the absorptive main body 2 is intermittently arranged between the absorptive main bodies 2 adjacent to each other in the flow direction by the irradiation of a laser beam. The disposable diaper 1 containing the exterior body 3 which is a body, and the absorptive main body 2 is obtained.

  More specifically, as shown in FIG. 4, a strip-like outer layer sheet 31 continuously supplied from a raw fabric roll (not shown) and a strip-like shape continuously supplied from a raw fabric roll (not shown). Stretching of the waist portion elastic member 5 forming the waist gather, the waist elastic member 6 forming the waist gather, and the leg elastic member 7 forming the leg gathers between the inner layer sheets 32 to a predetermined elongation rate A plurality of each are distributed in the state. At this time, the leg elastic members 7 are arranged while forming a predetermined leg circumference pattern via a known rocking guide (not shown) which reciprocates in a direction perpendicular to the sheet flow direction. In addition, before putting the band-shaped outer layer sheet 31 and the band-shaped inner layer sheet 32 on one another, an adhesive coating machine (shown in FIG. The hot melt adhesive is applied according to FIG. In addition, elastic members such as the waist elastic member 5 and the waist elastic member 6 are arranged in a stretched state so as to straddle the formation planned portion (fusion cut planned portion) of the side seal portion 4 in both sheets 31 and 32. In such a case, it is preferable to apply an adhesive to the portion and the vicinity thereof in order to avoid disadvantages such as significant shrinkage of the elastic member and detachment of the elastic member after the division. Before being disposed between the two sheets 31 and 32, the waist elastic member 5 and the waist elastic member 6 are intermittently coated with a hot melt adhesive by an adhesive coating machine (not shown). May be

  Then, as shown in FIG. 4, a belt-like outer layer sheet 31 and a belt-like outer layer sheet 31 sandwiching the waist elastic member 5, the waist elastic member 6 and the leg elastic member 7 in a stretched state between the pair of nip rolls 11. By feeding the inner layer sheet 32 and pressurizing it, a band-like outer package 3 in which a plurality of elastic members 5, 6, 7 are arranged in a stretched state is formed between the band-like sheets 31, 32. Further, in the process of forming the outer package 3, a plurality of bonding portions (not shown) for bonding the strip-shaped outer layer sheet 31 and the strip-shaped inner layer sheet 32 between two adjacent waist elastic members 6, 6 Is formed using joining means such as the convex roll 12 and the anvil roll 13 corresponding to this.

  Thereafter, according to need, elastic member pre-cut means (not shown) are used to correspond to the position where the absorbent main body 2 described later is disposed, and a plurality of waist elastic members 6 and a plurality of leg elastics. The member 7 is pressed and divided into a plurality of pieces so that the contraction function is not expressed. As said elastic member precut means, the elastic member division part etc. which are used for the manufacturing method of the compound expansion-contraction member of Unexamined-Japanese-Patent No. 2002-253605 etc. are mentioned, for example.

  Next, as shown in FIG. 4, an adhesive such as a hot melt adhesive is previously applied to the absorbent main body 2 manufactured in another step, and the absorbent main body 2 is rotated 90 degrees to form a belt-like exterior It intermittently supplies and fixes on the inner layer sheet 32 which comprises the body 3 (main body fixing process). Then, as shown in FIG. 4, a leg hole LO ′ is formed inside an annular portion annularly surrounded by the leg elastic member 7 in the band-like exterior body 3 in which the absorbent main body 2 is disposed. This leg hole formation process can be implemented using the method similar to the method in the manufacturing method of articles | goods of this kind conventionally, such as a rotary cutter and a laser cutter.

  Subsequently, the strip-shaped outer package 3 is folded in the width direction (direction orthogonal to the transport direction of the outer package 3). More preferably, as shown in FIG. 4, both sides 3 a, 3 a along the transport direction of the strip-like exterior body 3 are folded back so as to cover the longitudinal direction both ends of the absorbent main body 2. After fixing the direction both ends, the exterior body 3 is folded in two in the width direction together with the absorbent main body 2. Thus, the diaper continuous body 10A as the sheet laminate 10 is obtained.

  The diaper continuous body 10A obtained in this manner is conveyed to the laser bonding apparatus 20 and supplied. The laser bonding apparatus 20 has a first surface 21a facing outward and a second surface 21b opposite to the first surface 21a facing inward, as shown in FIG. A cylindrical cylindrical roll 21 for conveying the sheet laminate 10 by rotating in one direction while supporting a strip-like sheet laminate 10 in which a plurality of sheets are stacked on the first surface 21a in the longitudinal direction; The laser light irradiator 35 disposed on the second surface 21 b side of the cylindrical roll 21 is supported on the first surface 21 a while moving in the rotational direction K of the cylindrical roll 21 in synchronization with the rotation of the cylindrical roll 21. A plurality of pressure heads 26 are provided to press the sheet stack 10 toward the first surface 21 a from the side facing the first surface 21 a. As described above, in the apparatus and method of the present embodiment, since the strip-like sheet laminate 10 is an exterior body continuum forming a part of the diaper continuum 10A, the strip-like sheet laminate 10 has absorbability. As the diaper continuous body 10A in which the main body 2 is intermittently arranged, while supported on the first surface 21a, the main body 2 is conveyed by the cylindrical roll 21. The diaper continuous body 10A is turned by the introduction roll 28 and introduced onto the first surface 21a. Then, in a state where the diaper continuous body 10A is supported on the first surface 21a of the cylindrical roll 21, the diaper continuous body 10A is processed, and the diaper 1 obtained thereby passes through the guide roll 29 and the device 20 is out. Sent to

  The cylindrical roll 21 has, as shown in FIGS. 5 and 6, a plurality of pressing portion support members 121 intermittently provided in the circumferential direction of the cylindrical roll 21 on the circumferential surface thereof. The pressing portion support member 121 forms a part of the peripheral surface portion of the cylindrical roll 21 and is formed of a heat-resistant material such as a metal material such as iron, aluminum, stainless steel or copper, or a ceramic.

  The pressing portion support member 121 has a slit-like support member side opening 27 through which the laser beam 30 emitted from the second surface 21 b can pass. The support member side opening 27 is a slit-like opening extending in a direction intersecting the circumferential direction of the cylindrical roll 21 and is a laser light transmitting portion in the present invention. More specifically, the support member side opening 27 has a rectangular shape in a plan view, and the longitudinal direction thereof is more preferably a direction coincident with the width direction of the strip sheet laminate 10 and the diaper continuous body 10A. In the direction parallel to the axial length direction of the rotation axis of the cylindrical roll 21. A plurality of support member side openings 27 are provided at predetermined intervals in the circumferential direction of the cylindrical roll 21.

  As shown in FIG. 6, the pressing portion support member 121 has an upper surface a forming the first surface 21 a of the cylindrical roll 21, and a pair of end faces c and c located at the end of the cylindrical roll 21 in the circumferential direction. A main body 122 provided with a pair of side end faces d, d located at the end in the rotational axis direction 21 and a fixing extension 123 formed so as to project from the periphery of the lower end of the main body 122; Have. The main body portion 122 of the pressing portion support member 121 has a cavity inside, and a slit-like gap formed in the upper part of the cavity by the two slit forming members 124 and 124 corresponds to the support member side opening 27 It has become. That is, the support member side opening 27 is formed on the upper surface a of the pressing portion support member 121.

  The laser beam irradiation unit 35 is a galvano scanner (a device having a mirror attached to a motor shaft) for freely scanning the laser beam 30, a mechanism for advancing and retracting the laser beam 30 in a direction parallel to the rotation axis of the cylindrical roll 21, laser A mechanism for moving the position (irradiation point) of the continuous sheet 10 of the diaper continuous body 10A supported by the light 30 on the first surface 21a of the cylindrical roll 21 in the circumferential direction of the cylindrical roll 21 and the circumference of the cylindrical roll 21 The adjustment mechanism etc. which make the spot diameter of the laser beam 30 constant on a surface are provided. The adjustment mechanism includes a condenser lens. By having such a configuration, the laser beam irradiation unit can arbitrarily move the irradiation point of the laser beam 30 in the circumferential direction of the cylindrical roll 21 and in both directions orthogonal to the circumferential direction.

  As shown in FIGS. 7 and 8, the pressure head 26 is a cylindrical sheet laminate 10 that is an object of melting cut, that is, the diaper continuous body 10A at a position corresponding to the above-described support member side opening 27. It is used to press against the roll 21. The pressure head 26 is disposed at a position on the first surface 21 a side of the cylindrical roll 21. In detail, the pressing head 26 presses the diaper continuous body 10A supported on the support member side opening 27 of the pressing portion support member 121 described above toward the support member side opening 27 One pressure head 26 is provided for each support member side opening 27 used. In the laser bonding apparatus 20 shown in FIG. 5, a plurality of pressure heads 26 are disposed. Each pressing head 26 has a rotation axis on the extension of the rotation axis of the cylindrical roll 21 and is disposed on the circumferential surface of the second cylindrical roll 25 disposed adjacent to the cylindrical roll 21. The second cylindrical roll 25 rotates in synchronization with the cylindrical roll 21. In FIG. 5, each pressing head 26 is attached to the second cylindrical roller 25 which is a separate member from the cylindrical roller 21, but instead, each pressing head 26 is attached to the cylindrical roller 21. It is also possible to attach.

  By rotating the second cylindrical roll 25 in synchronization with the cylindrical roll 21, each pressing head 26 moves in the rotational direction of the cylindrical roll 21 in synchronization with the rotation of the cylindrical roll 21, and the outer periphery of the cylindrical roll 21 It can be circulated along the circumferential surface of the cylindrical roll 21 in the same direction as the rotational direction of the pressing portion support member 121 constituting the portion and at the same speed as the angular velocity of the pressing portion support member 121.

As shown in FIGS. 7 and 8, the pressure head 26 has a width direction Y ₁ perpendicular longitudinal X ₁ and therewith, has a vertically long shape along a longitudinal direction X _1. Pressure head 26 has its longitudinal direction X ₁ is, the circumferential direction of the cylindrical roll 21, i.e. perpendicular to the conveying direction of the sheet laminate 10, and a width direction Y ₁ is, the circumferential direction of the cylindrical roll 21, i.e. the sheet stack It is arranged to face in the same direction as the transport direction of the body 10. The pressure head 26 includes a pair of pressure members 50 a and 50 b, pressure mechanisms 60 a and 60 b, and an arm 70. The arm 70 is a member for supporting the entire pressure head 26, and the rear end area 70 A along the longitudinal direction X ₁ of the arm 70 has the pressure head 26 on the first surface 21 a of the cylindrical roll 21 as described later. The fulcrum serves as a fulcrum when moving in and out, and is coupled to a support portion 24 of a hinge structure described later.

  The pressure members 50a and 50b form a pair, and the two are assembled to constitute the main body 50A. The main body portion 50A configured by the pressure members 50a and 50b forms the pressure member side opening 51 between the pressure members 50a and 50b. The pressing member side opening 51 extends in the same direction as the extending direction of the supporting member side opening 27 and is disposed to face the supporting member side opening 27. The pressure members 50 a and 50 b are members that actually press the diaper continuous body 10 A toward the first surface 21 a of the cylindrical roll 21 in the pressure head 26.

The body portion 50A has a longitudinal direction X _1, same as the width direction Y ₁ orthogonal, its interior is in a hollow structure. The hollow portion, the shape of its cross section is of polygonal shape, and extends in the longitudinal direction X ₁ of the main body portion 50A. Also, the hollow portion is connected to an air suction device (not shown). As a result, the pressure head 26 is configured to be able to suck air from the outside to the inside of the pressure head 26 between the pair of pressure members 50 a and 50 b. By adopting such a configuration, there is an advantage that smoke and decomposition products generated at the time of melting and cutting the sheet laminate can be efficiently removed. When a pair of pressure members 50a and 50b disposed apart from each other sucks air from the outside of the pressure head 26 from the viewpoint of more effectively removing smoke and the like by suction. Preferably, a cover (not shown) for preventing air from leaking from the gap between the pressure members 50a and 50b is disposed in the gap between the pressure members 50a and 50b.

Pressure member 50a, 50b in the longitudinal direction _X side walls 150a extending _1, a pair of mutually approaching while inclined from the tip of 150b local pressure member 151a, and a 151b. Each local pressure member 151a, 151b is of a vertically long plate extending in the longitudinal direction _{X 1,} side walls 150a, are 150b integrally formed. Each local pressure member 151a, 151b in the width direction Y ₁ to along has a predetermined thickness, and an acute angle the tip is chamfered, the chamfered by formed face pressure face 52a , 52b. The pressing surfaces 52a and 52b are flat surfaces. Each of the local pressure members 151a and 151b is used to locally press the sheet stack 10 supported on the upper surface a of the pressure part support member 121 by the pressure surfaces 52a and 52b.

A pair of local pressure member 151a, 151b is the side walls 150a, arranged inclined from the distal end of 150b so as to approach each other, the pair of pressing surfaces 52a, 52b is, at predetermined intervals in the width direction _{Y 1} Non are arranged in contact, they are arranged parallel to the longitudinal direction X _1. Therefore, a space is provided between the pair of local pressure members 151a and 151b. This space, extends along the longitudinal direction X ₁ of the main body portion 50A, but also extends in the thickness direction of the main body portion 50A. This space is in communication with the hollow portion provided inside the above-described main body portion 50A. This space is open at the tip of the pair of local pressure members 151a and 151b. This opening functions as the pressure member side opening 51 described above.

  As shown in FIG. 9, the pressing member side opening 51 is disposed so as to abut on the upper surface a of the pressing portion supporting member 121 so as to cover the entire supporting member side opening 27 of the pressing portion supporting member 121. Be done. That is, the pressing member side opening 51 extends in the same direction as the extending direction of the supporting member side opening 27 provided in the pressing portion supporting member 121 and is disposed to face the supporting member side opening 27. As a result, the pressing surfaces 52a and 52b of the pressing members 50a and 50b are disposed at positions corresponding to the side regions 27a and 27b of the opening 27 so as to extend in the same direction as the direction in which the support member side opening 27 extends. It will be done.

  As shown in FIGS. 7 and 8, the pressure head 26 is the back surface of the main body 50A including the pressure members 50a and 50b described above, that is, the side opposite to the surface on which the pressure member side opening 51 is formed. The pressure mechanisms 60 a and 60 b are provided on the surface of The pressing mechanisms 60a and 60b are used to apply a pressing force to the pressing members 50a and 50b in a state where the pressing head 26 presses the diaper continuous body 10A. The pressing mechanisms 60a and 60b are in pairs. The pressure mechanisms 60a and 60b are assembled in pairs with the pressure members 50a and 50b described above. That is, the pressure mechanism 60a is assembled to the pressure member 50a, and the pressure mechanism 60b is assembled to the pressure member 50b. Each pressurizing mechanism 60a, 60b is provided with pressure applying means 61a, 61b. Examples of the pressure applying means 61a, 61b include, but not limited to, a spring and a cylinder. In FIG. 7 and FIG. 8, the form which used the spring as pressure provision means 61a, 61b is shown. The springs as the pressure applying means 61 a and 61 b are supported by the support rod 62. One end of the support rod 62 is fixed to the pressing members 50a and 50b. The other end of the support rod 62 passes through the arm 70, and the other end is fixed by a fixing device 63. The support rod 62 can slide in the through hole provided in the arm 70. The springs as the pressure applying means 61a and 61b are biased by the pressing members 50a and 50b and the arm 70, and the biased state is maintained by the fixture 63 attached to the support rod 62. It is done. Therefore, each pressing mechanism 60a, 60b can apply a pressing force independently to the pressing members 50a, 50b assembled in pairs.

A mode showing the operation of the pressure head 26 having the above configuration is shown in FIG. FIG. 10 schematically shows the main part of the cross section of the laser bonding apparatus 20. As shown in FIG. The figure is a longitudinal cross-sectional view which passes along the rotating shaft of the cylindrical roll 21. As shown in FIG. As shown in the figure, the arm 70 of the pressure head 26 has one end in the longitudinal direction X ₁ , in other words, one end of the pressure member side opening 51 provided in the pressure head 26. The end zone 70A is coupled to the support 24 of the hinge structure. The support portion 24 is attached to the second cylindrical roll 25. The pressing head 26 is capable of oscillating in a plane passing through the rotation axis of the cylindrical roll 21, for example, in the plane of the drawing in FIG. 10, with the support portion 24 as a fulcrum. As shown in FIG. 10, the pressure surfaces 52a and 52b of the pressure head 26 are sufficiently separated from the circumferential surface of the cylindrical roll 21 as shown in FIG. The pressing surfaces 52a and 52b are cylindrical rolls from the state where they do not interfere with the diaper continuous body 10A introduced to the machine (for example, in FIG. 10, the pressing head 26 shown on the upper side is orthogonal to the circumferential surface of the cylindrical It is a range to the state (state shown on the lower side in FIG. 10) parallel to the circumferential surface of 21. Within this swinging range, the pressure head 26 swings along the circumferential surface of the cylindrical roll 21 while swinging, and while the pressure head 26 is rotating, the pressure head 26 is the first of the cylindrical rolls 21. The contact and separation operation is repeated on the surface 21a.

  In order to swing the pressing head 26, known means may be appropriately used. For example, a cam mechanism, a cylinder mechanism, or a servomotor can be used.

  Instead of swinging movement of the pressure head 26, another movement is carried out so that while the pressure head 26 orbits along the circumferential surface of the cylindrical roll 21, the pressure head 26 is The first surface 21 a of the roll 21 can also be moved in contact with or separated from the first surface 21 a. For example, the pressure head 26 can be configured to be capable of reciprocating movement along the radial direction of the cylindrical roll 21. By doing this, while the pressure head 26 circulates along the circumferential surface of the cylindrical roll 21, the pressure head 26 reciprocates along the radial direction of the cylindrical roll 21, whereby the pressure is applied. The pressure head 26 repeats contact and separation operations with the first surface 21 a of the cylindrical roll 21. The means for causing the pressure head 26 to reciprocate is similar to the means for causing the pressure head 26 to oscillate, and for example, a cam mechanism, a cylinder mechanism, or a servomotor may be used.

  FIGS. 11 and 12 show that the diaper continuous body 10A is melted and cut to manufacture a pants-type disposable diaper as a sheet fusion-bonded body. As shown in these figures, the band-like sheet laminate 10 which is an object of melt cutting, that is, the diaper continuous body 10A, is conveyed by the pressing portion supporting member 121 in the cylindrical roll 21 and the pressure in the pressing head 26. It is pinched by members 50a and 50b, and is pressurized along the width direction (direction orthogonal to the paper surface in FIG. 12) of the diaper continuous body 10A. This pressurization is performed at a pair of positions along the longitudinal direction of the sheet stack 10, that is, the transport direction. Specifically, as shown in FIG. 12, it is performed in the side regions 27a and 27b of the support member side opening 27 in the cylindrical roll 21. In this case, the pressing members 50a and 50b are independently and independently applied with pressure by the pressing mechanisms 60a and 60b which are independent members as described above. Therefore, in the diaper continuous bodies 10A in each side area 27a, 27b, so-called "one-piece hit" which is a phenomenon in which one of them is strongly pressed and the other is weakly pressed hardly occurs. As a result, even if the diaper continuous body 10A is irradiated with the laser light 30 and the irradiation site is melted down, the end portion of the fused diaper continuous body 10A is the pressing portion supporting member 121 and the pressing members 50a and 50b. Thus, the diaper continuous body 10A can be effectively prevented from coming off between the two.

  From the viewpoint of making the above-mentioned effect more reliable, as shown in FIG. 13 (a), the pressurizing members 50a and 50b under pressure of the diaper continuous body (not shown) by the pressure head 26, It is preferable to have the convex part 53 which can be fitted in the recessed part 125 provided in the pressure part supporting member 121 which comprises the 1st surface 21a in the cylindrical roll 21. As shown in FIG. Alternatively, as shown in FIG. 13 (b), the pressurizing members 50 a and 50 b constitute the first surface 21 a of the cylindrical roll 21 under the pressure applied to the diaper continuous body (not shown) by the pressurizing head 26. It is preferable to have the recessed part 54 which can be fitted in the convex part 126 provided in the pressurizing part support member 121. As shown in FIG. By adopting such a configuration, when the sheet stack 10 is gripped by both the pressing portion support member 121 and the pressing members 50a and 50b, the convex portion 53 and the concave portion 125 may be fitted, or Or the convex part 126 and the recessed part 54 fit, and the diaper continuous body 10A is hold | gripped more reliably.

  By the operation as described above, the sheet laminate 10 constituting a part of the diaper continuous body 10A is divided into individual diapers 1 by melting it in the width direction at a predetermined pitch, and at the same time it is generated by the division. The cut edges of the plurality of sheets are fused to form a pair of side seal portions 4 as seal edges. By doing so, the pants-type disposable diaper 1 having the exterior body 3 as "a sheet fused body having a seal edge fused in a state where the edges of a plurality of sheets overlap" is continuously manufactured. Do.

  As described above, according to the present invention, since the pressurization along the width direction of the sheet laminate 10 is independently performed at a pair of positions along the longitudinal direction, the pressing portion support member 121 and the pressing member 50 a , 50b can reliably hold the sheet stack 10. In addition, for points that are not particularly described in relation to the present invention, for example, details of the contact / separation operation of the pressure head 26, etc., for example, JP-A-2015-85652 and JP-A-2017-70464 pertaining to the prior application of the present application. The matters described in JP-A-2017-104288, etc. are applied as appropriate.

  14 (a) and (b) show another embodiment of the present invention. In addition, the description regarding embodiment mentioned previously applies suitably about the point which does not demonstrate in particular regarding embodiment shown to these figures. In FIGS. 14A and 14B, the same members as those in FIGS. 1 to 13 are denoted by the same reference numerals. In the embodiment shown in FIGS. 14 (a) and 14 (b), the pressure part support member 121 of the cylindrical roll 21 is extended in the same direction as the direction in which the slit-like support member side opening 27 extends. The side regions 27a and 27b of the portion 27 have a pair of support-side pressing members 127a and 127b. The support-side pressing members 127a and 127b are assembled in a pair with the support-side pressing members 127a and 127b, and the radial direction of the cylindrical roll 21 (Z direction in FIGS. 14A and 14B). In each case, stretchable elasticity is independently provided. The support-side pressing mechanisms 128a and 128b shown in FIG. 14A are composed of springs. On the other hand, the support-side pressing mechanisms 128a and 128b shown in FIG. 14 (b) are made of a rubber elastic material. The degree of elasticity of the support-side pressing mechanisms 128a and 128b can be adjusted by the spring constant and the initial deflection amount if it is a spring, and if it is a rubber elastic body, its thickness and type It can be adjusted by selection.

  According to the present embodiment, the diaper continuous body 10A located in each side area 27a, 27b is sandwiched between the support side pressing members 127a, 127b and the pressure head, and the width direction of the diaper continuous body 10A ( Since the support-side pressing members 127a and 127b independently press the diaper continuous body 10A in the state of being pressed along the direction perpendicular to the paper surface in FIGS. 14 (a) and 14 (b), the support-side pressing is performed. Grasping by both the pressure members 127a and 127b and the pressure head 26 is reliably performed, and the diaper continuous body 10A is effectively prevented from coming off between the both. In order to further ensure this effect, a pair of pressing members (not shown) which are portions of the pressing head 26 facing the support-side pressing members 127a and 127b respectively are diaper continuous bodies independently. It is preferable that a pressure can be applied to 10A. For example, it is preferable to use the pressing members 50a and 50b shown in FIG. 7 and FIG. However, as long as the support-side pressing members 127a and 127b are adopted, the present invention can be applied even if the pair of pressing members in the pressing head 26 can not independently apply the pressing force to the diaper continuous body 10A. The effect of

  Although the present invention has been described above based on its preferred embodiments, the present invention is not limited to the embodiments. For example, in the above-described laser bonding apparatus 20, the circumferential surface portion of the cylindrical roll 21 serves as a support member, and has a rotational axis on the extension of the rotational axis of the cylindrical roll 21 and is disposed adjacent to the cylindrical roll 21. Each pressing head 26 is provided on the circumferential surface of the second cylindrical roll 25. However, instead of this, a laser bonding apparatus having a flat member may be used.

  Moreover, although the said embodiment concerns on the underpants-type disposable diaper as an example of a sheet | seat fusion body, this invention is applicable similarly to manufacture of the sheet | seat fusion body of another form.

  With respect to the above-described embodiment, the present invention further discloses the following apparatus and method for producing a sheet fusion product.

<1>
What is claimed is: 1. A manufacturing apparatus of a sheet fusion body having a seal edge fused in a state where the edges of a plurality of sheets overlap.
A support member having a first surface and a second surface opposite to the first surface and supporting a band-like sheet laminate on which a plurality of sheets including a resin material is overlapped at least partially on the first surface;
And a laser beam irradiation unit disposed on the second surface side of the support member and having a lens for condensing the laser beam.
The support member has a slit-like opening which is long in the width direction of the sheet laminate, through which laser light emitted from the second surface side can pass.
A pair of pressure members disposed at positions corresponding to side areas of the slit-like opening so as to extend in the same direction as the extending direction of the slit-like opening and pressing the sheet stack toward the support member; And a pressing head having a pressing mechanism disposed on the back surface of the pair of pressing members and independently applying a pressing force to the pressing members, disposed at a position on the first surface side of the support member. , Sheet fusion body manufacturing equipment.

<2>
The manufacturing apparatus of the sheet fusion body as described in said <1> in which the said pressurization member is equipped with a spring or a cylinder.
<3>
The pressure member is a pair of two,
The sheet fusion as described in the above <1> or <2>, wherein the pair of pressure members has a longitudinal direction and a width direction perpendicular thereto, and the inside is hollow. Body manufacturing equipment.
<4>
The apparatus for manufacturing a sheet fusion-bonded body according to <3>, wherein the pair of pressing members includes a pair of local pressing members that approach each other while inclining from tips of both longitudinally extending side walls.
<5>
What is claimed is: 1. A manufacturing apparatus of a sheet fusion body having a seal edge fused in a state where the edges of a plurality of sheets overlap.
A support member having a first surface and a second surface opposite to the first surface and supporting a band-like sheet laminate on which a plurality of sheets including a resin material is overlapped at least partially on the first surface;
And a laser beam irradiation unit disposed on the second surface side of the support member and having a lens for condensing the laser beam.
The support member has a slit-like opening which is long in the width direction of the sheet laminate, through which laser light emitted from the second surface side can pass.
A pressure head for pressing the sheet stack toward the support member at a position corresponding to the slit-like opening is disposed at a position on the first surface side of the support member.
The support member has a pair of support-side pressing members disposed in the side area of the opening so as to extend in the same direction as the direction in which the slit-like opening extends.
The apparatus for manufacturing a sheet fusion-bonded body, wherein the pair of support-side pressing members are capable of independently applying a pressing force.
<6>
The manufacturing apparatus of the sheet fusion body according to <5>, wherein the support-side pressing member is provided with elasticity by a spring or a rubber elastic body.

<7>
Under pressure by the pressure head,
The pressing member has a protrusion that can be fitted into a recess provided on the first surface of the support member, or the pressing member is provided on the first surface of the support member The manufacturing apparatus of the sheet fusion body as described in any one of said <1> thru | or <6> which has the recessed part which can be fitted to a part.
<8>
The pressure head according to any one of <1> to <7>, wherein air suction can be performed from the outside to the inside of the pressure head through the space between the pair of pressure members. Equipment for manufacturing sheet fusion bodies.
<9>
A pair of the pressure members are disposed apart from each other,
A cover for preventing air from leaking from the gap between the pressing members when the air is sucked from the outside to the inside of the pressing head is disposed in the gap between the pressing members. The manufacturing apparatus of the sheet fusion body as described in 8>.
<10>
The support member comprises a cylinder having a first surface facing outward and a second surface facing inward, and rotatable in one direction;
A plurality of slit-like openings extending in unison with the direction parallel to the axial direction of the axis of rotation of the cylinder are provided on the circumferential surface of the cylinder at predetermined intervals in the circumferential direction of the cylinder,
The pressure head can orbit along the circumferential surface of the support member in the same direction as the rotation direction of the support member and at the same speed as the angular velocity of the support member.
The pressure head is configured to repeat contact and separation operations with respect to the first surface of the support member while the pressure head circulates along the circumferential surface of the support member. The manufacturing apparatus of the sheet fusion body as described in any one of <9>.
<11>
The pressure head is capable of oscillating in a plane passing through the rotation axis of the support member, with one end of the slit-like opening in the extending direction as a fulcrum, whereby the pressure head is The manufacturing apparatus of the sheet fusion body as described in said <10> which carries out contact / separation operation with respect to the 1st surface of the said supporting member.

<12>
The pressure head is capable of reciprocating along the radial direction of the support member, whereby the pressure head is moved in contact with and separated from the first surface of the support member. The manufacturing apparatus of the sheet fusion body as described in said <10>.
<13>
The apparatus according to any one of <1> to <12>;
It is used to manufacture a pants-type disposable diaper having an outer package having a pair of side seals as a sheet fusion body having a seal edge fused in a state where the edges of a plurality of sheets overlap. Equipment for manufacturing pants-type disposable diapers.
<14>
And an outer package forming an outer surface of the diaper, wherein left and right side edges along the longitudinal direction of the outer package in the front body and left and right edges along the vertical direction of the outer package in the rear body are joined A pair of side seal portions, a waist opening portion and a pair of leg opening portions, and the exterior body is located on the non-skin contact surface side of the absorbent main body to fix the absorbent main body The manufacturing apparatus of the underpants-type disposable diaper as described in said <13> used for manufacturing a type | mold disposable diaper.
<15>
The absorbent main body manufactured in a separate step is intermittently supplied and fixed on an inner layer sheet constituting the band-like outer package, and then a leg hole is formed in the outer package,
Then, the band-shaped outer package is folded in a direction orthogonal to the transport direction of the outer package, thereby obtaining a diaper continuous body;
Subsequently, a laser type bonding apparatus is used with respect to the said diaper continuous body, a laser beam is irradiated, a pair of said side seal part is formed, and the underpants type disposable diaper which comprises the exterior body which has a pair of this side seal part. The manufacturing apparatus of the underpants-type disposable diaper as described in said <13> or <14> which manufactures 1 continuously.
<16>
What is claimed is: 1. A method for producing a sheet fused body having a seal edge fused in a state where the edges of a plurality of sheets overlap.
Supporting a band-like sheet laminate in which a plurality of sheets including a resin material is overlapped at least in part on a first surface of a support member having a first surface and a second surface opposite to the first surface;
A lens disposed on the second surface side of the support member and pressing the laser light under a state in which the sheet stack is pressed toward the support member along the width direction by a pressure head; The laser beam is irradiated from the laser beam irradiating portion toward the sheet laminate supported on the first surface of the support member to simultaneously divide the sheet laminate across the width direction. And fusing the edges of the sheet in an overlapping state to produce a sheet fused body having the seal edge,
The manufacturing method of a sheet fusion body which performs independently pressurization in the cross direction of the above-mentioned sheet layered product in a pair of positions in alignment with the longitudinal direction.

<17>
The support member is a cylindrical roll, and has a slit-like opening extending in a direction intersecting the circumferential direction of the cylindrical roll.
The pressure head is disposed at a position corresponding to a side area of the opening so as to extend in the same direction as the direction in which the opening extends, and a pair of pressing members press the sheet stack toward the support member. Having a pressure member,
The method according to <16>, wherein pressing by the pair of pressing members is performed independently at positions corresponding to the side regions in the sheet laminate.
<18>
The support member is a cylindrical roll, and has a slit-like opening extending in a direction intersecting the circumferential direction of the cylindrical roll.
The cylindrical roll has a pair of support-side pressing members in the side area of the opening so as to extend in the same direction as the direction in which the opening extends.
The manufacturing method of the sheet fusion body as described in said <16> which performs independently the pressurization by a pair of said support body side pressurization member in the position corresponding to the said side area in the said sheet laminated body, respectively.
<19>
The <17> or <17> in which the convex portion or the concave portion provided on the pressure member is fitted to the concave portion or the convex portion provided on the first surface of the support member under the pressure state by the pressure head. The manufacturing method of the sheet fusion body as described in any one of 18>.
<20>
The method according to any one of <17> to <19>, wherein air is sucked from the outside to the inside of the pressure head through the space between the pair of pressure members.
<21>
The method according to any one of <16> to <20>.
A pant-type disposable diaper for producing a pant-type disposable diaper having an outer package having a pair of side seal portions as a sheet fusion body having a seal edge fused in a state where the edges of a plurality of sheets overlap Manufacturing method.

<22>
And an outer package forming an outer surface of the diaper, wherein left and right side edges along the longitudinal direction of the outer package in the front body and left and right edges along the vertical direction of the outer package in the rear body are joined A pair of side seal portions, a waist opening portion and a pair of leg opening portions, and the exterior body is located on the non-skin contact surface side of the absorbent main body to fix the absorbent main body Method of manufacturing the pants-type disposable diaper according to <21>, which is used for producing a disposable diaper, wherein the band-like outer package is held in a pressurized state, and the side seal is irradiated with a laser beam. The manufacturing method of the underpants-type disposable diaper which forms a part.

1 Pants type disposable diaper (sheet fusion body)
DESCRIPTION OF SYMBOLS 2 Absorbable main body 3 Outer package 31 Outer layer sheet 32 Inner layer sheet 4 Side seal part 40 Fused part 41 Seal edge 5, 6, 7 Elastic member 10 Sheet laminated body 10A Diaper continuum 20 Laser type joining device (sheet fused body Production equipment)
21 Cylindrical roll 121 Pressurizing portion support member 27 Slit-like support member side opening portion (laser light transmitting portion)
Reference Signs List 30 laser beam 35 laser beam irradiating unit 50a, 50b pressing members 52a, 52b pressing surfaces 60a, 60b pressing mechanisms 61a, 61b pressure applying means 62 support bar 63 fixing tool 70 arm portion

Claims (14)

What is claimed is: 1. A manufacturing apparatus of a sheet fusion body having a seal edge fused in a state where the edges of a plurality of sheets overlap.
A support member having a first surface and a second surface opposite to the first surface and supporting a band-like sheet laminate on which a plurality of sheets including a resin material is overlapped at least partially on the first surface;
And a laser beam irradiation unit disposed on the second surface side of the support member and having a lens for condensing the laser beam.
The support member has a slit-like opening which is long in the width direction of the sheet laminate, through which laser light emitted from the second surface side can pass.
A pair of pressure members disposed at positions corresponding to side areas of the slit-like opening so as to extend in the same direction as the extending direction of the slit-like opening and pressing the sheet stack toward the support member; And a pressing head having a pressing mechanism disposed on the back surface of the pair of pressing members and independently applying a pressing force to the pressing members, disposed at a position on the first surface side of the support member. , Sheet fusion body manufacturing equipment.   The manufacturing apparatus of the sheet fusion body according to claim 1, wherein the pressing member comprises a spring or a cylinder. What is claimed is: 1. A manufacturing apparatus of a sheet fusion body having a seal edge fused in a state where the edges of a plurality of sheets overlap.
A support member having a first surface and a second surface opposite to the first surface and supporting a band-like sheet laminate on which a plurality of sheets including a resin material is overlapped at least partially on the first surface;
And a laser beam irradiation unit disposed on the second surface side of the support member and having a lens for condensing the laser beam.
The support member has a slit-like opening which is long in the width direction of the sheet laminate, through which laser light emitted from the second surface side can pass.
A pressure head for pressing the sheet stack toward the support member at a position corresponding to the slit-like opening is disposed at a position on the first surface side of the support member.
The support member has a pair of support-side pressing members disposed in the side area of the opening so as to extend in the same direction as the direction in which the slit-like opening extends.
The apparatus for manufacturing a sheet fusion-bonded body, wherein the pair of support-side pressing members are capable of independently applying a pressing force.   The manufacturing apparatus of the sheet fusion body according to claim 3, wherein the support side pressing member is provided with elasticity by a spring or a rubber elastic body. Under pressure by the pressure head,
The pressing member has a protrusion that can be fitted into a recess provided on the first surface of the support member, or the pressing member is provided on the first surface of the support member The manufacturing apparatus of the sheet fusion body as described in any one of the Claims 1 thru | or 4 which have a recessed part which can be fitted to a part.   The sheet melter according to any one of claims 1 to 5, wherein the pressure head is configured to be capable of sucking air from the outside to the inside of the pressure head through the space between the pair of pressure members. Equipment for manufacturing the garment. A pair of the pressure members are disposed apart from each other,
A cover for preventing air from leaking from the gap between the pressing members when the air is sucked from the outside to the inside of the pressing head is disposed in the gap between the pressing members. The manufacturing apparatus of the sheet fusion body as described in 6. What is claimed is: 1. A method for producing a sheet fused body having a seal edge fused in a state where the edges of a plurality of sheets overlap.
Supporting a band-like sheet laminate in which a plurality of sheets including a resin material is overlapped at least in part on a first surface of a support member having a first surface and a second surface opposite to the first surface;
A lens disposed on the second surface side of the support member and pressing the laser light under a state in which the sheet stack is pressed toward the support member along the width direction by a pressure head; The laser beam is irradiated from the laser beam irradiating portion toward the sheet laminate supported on the first surface of the support member to simultaneously divide the sheet laminate across the width direction. And fusing the edges of the sheet in an overlapping state to produce a sheet fused body having the seal edge,
The manufacturing method of a sheet fusion body which performs independently pressurization in the cross direction of the above-mentioned sheet layered product in a pair of positions in alignment with the longitudinal direction. The support member is a cylindrical roll, and has a slit-like opening extending in a direction intersecting the circumferential direction of the cylindrical roll.
The pressure head is disposed at a position corresponding to a side area of the opening so as to extend in the same direction as the direction in which the opening extends, and a pair of pressing members press the sheet stack toward the support member. Having a pressure member,
The method according to claim 8, wherein pressing by the pair of pressing members is performed independently at positions corresponding to the side regions in the sheet laminate. The support member is a cylindrical roll, and has a slit-like opening extending in a direction intersecting the circumferential direction of the cylindrical roll.
The cylindrical roll has a pair of support-side pressing members in the side area of the opening so as to extend in the same direction as the direction in which the opening extends.
The method according to claim 8, wherein pressing by the pair of support-side pressing members is performed independently at positions corresponding to the side regions in the sheet laminate.   The protrusion or the recess provided on the pressing member is fitted to the recess or the protrusion provided on the first surface of the support member under the pressure applied by the pressure head. The manufacturing method of the sheet fusion body as described.   The method for manufacturing a sheet fusion body according to any one of claims 9 to 11, wherein air is sucked from the outside to the inside of the pressure head through the space between the pair of pressure members. A manufacturing method according to any one of claims 8 to 12, comprising:
A pant-type disposable diaper for producing a pant-type disposable diaper having an outer package having a pair of side seal portions as a sheet fusion body having a seal edge fused in a state where the edges of a plurality of sheets overlap Manufacturing method.   And an outer package forming an outer surface of the diaper, wherein left and right side edges along the longitudinal direction of the outer package in the front body and left and right edges along the vertical direction of the outer package in the rear body are joined A pair of side seal portions, a waist opening portion and a pair of leg opening portions, and the exterior body is located on the non-skin contact surface side of the absorbent main body to fix the absorbent main body The method of manufacturing a pants-type disposable diaper according to claim 13, which is used to manufacture a type-type disposable diaper, wherein the band-like outer package is held in a pressurized state, and the side seal portion is irradiated with a laser beam. Of manufacturing a pants-type disposable diaper to form

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