JP6993839B2 - Sheet fusion body manufacturing equipment and manufacturing method - Google Patents

Description

The present invention relates to a sheet fusion body manufacturing apparatus and a manufacturing method.

As a conventional technique for joining laminated sheets to each other, for example, in Patent Document 1, a sheet laminate in which a plurality of sheets are stacked is placed along the peripheral surface of a rotating roll having a laser light transmitting portion on the peripheral surface. Described is a method of irradiating the sheet laminated body with a laser beam from the inside of the rotating roll to fuse the sheets in the sheet laminated body while deforming and transporting the sheet laminated body.

In Patent Document 1, the sheet laminate is supported on a support member, pressurized by using a pressurizing head, and the sheet laminate is sandwiched between the pressurizing head and the supporting member, and the state thereof. The above-mentioned laser beam is irradiated below. The pressurizing head includes a pair of local pressurizing members that locally pressurize the sheet laminate and a pair of tension applying members that apply tension to the sheet laminate. The tension applying member is made of a flexible material, and the surface facing the sheet laminate protrudes from the pressure surface of the local pressure member. The tension-applying member is located between the tension-applying members because the pressure-applying surface of the local pressurizing member comes into contact with the sheet laminate prior to pressurizing the sheet laminate and is deformed so as to be separated from each other. Tension is applied to the sheet laminate. By configuring the pressurizing head in this way, the sheet laminate is pressurized by the local pressurizing member under the state where the tension is applied by the tension applying member, so that each sheet constituting the sheet laminate is formed. Will be in close contact with each other, and the sheets will be fused to each other.

Japanese Unexamined Patent Publication No. 2015-85562

The sheet laminate may have the same thickness over the entire area pressurized by the pressurizing head, or may have different thicknesses. When the thickness of the sheet laminate is different in a part of the region pressurized by the pressurizing head, the pressing force by the pressurizing head is different due to the difference in thickness, and a uniform pressing force can be obtained. Sometimes not. As a result, there is a possibility that the sheets in the sheet laminate are not reliably fused to each other.

Therefore, an object of the present invention is to provide a manufacturing apparatus and a manufacturing method for a sheet fused body that can eliminate the drawbacks of the above-mentioned prior art.

The present invention is an apparatus for manufacturing a sheet fused body having a sealed edge fused in a state where the edges of a plurality of sheets are overlapped with each other.
A support member having a first surface and a second surface located on the opposite side thereof, and supporting a strip-shaped sheet laminate having a plurality of sheets containing a resin material at least partially on the first surface.
A laser light irradiation unit arranged on the second surface side of the support member is provided.
The support member has a slit-shaped opening that is long in the width direction of the sheet laminate and allows the laser light emitted from the second surface side to pass through.
A pressure head that pressurizes the sheet laminate toward the support member at a position corresponding to the slit-shaped opening is arranged at a position on the first surface side of the support member.
The pressurizing head extends in the same direction as the extending direction of the slit-shaped opening and pressurizes the sheet laminate toward the support member, and is arranged on the back surface of the pressurizing member. It has a pressurizing mechanism that applies pressurizing force to the pressurizing member.
The pressurizing member is supported by a hinge structure provided in the pressurizing mechanism at a substantially central portion in the extending direction of the pressurizing member, and one end side in the extending direction of the pressurizing member with the hinge structure as a fulcrum. Or the other end side can swing in the pressurizing direction,
The pressurizing member and the pressurizing mechanism are connected by connecting members at positions on one end side and the other end side in the extending direction of the pressurizing member.
The connecting member provides an apparatus for manufacturing a sheet fused body, which is deformable as the pressure member swings.

Further, the present invention is a method for manufacturing a sheet fused body having a sealed edge portion fused in a state where the edges of a plurality of sheets are overlapped with each other.
A strip-shaped sheet laminate in which a plurality of sheets containing at least a resin material are stacked is supported on the first surface of the support member having the first surface and the second surface located on the opposite side thereof.
The support member is pressed from the laser light irradiation unit arranged on the second surface side of the support member under a state in which the sheet laminate is pressurized toward the support member along the width direction of the sheet laminate by the pressurizing head. The sheet laminate supported on the first surface of the sheet is irradiated with a laser beam to divide the sheet laminate in the width direction, and at the same time, the edges of the division are fused in an overlapping state. A step of manufacturing a sheet fusion body having the seal edge portion is provided.
A method for manufacturing a sheet fusion body, in which a pressurizing member in the pressurizing head can be swung and the pressurizing member is tilted according to a thickness along the width direction of the sheet laminate to pressurize the sheet laminate. Is to provide.

According to the present invention, even when the thicknesses of the sheet laminates are partially different, the sheets in the sheet laminates can be reliably fused to each other.

FIG. 1 is a perspective view schematically showing a pants-type disposable diaper as an example of a sheet fusion body manufactured according to the present invention. FIG. 2 is a cross-sectional view schematically showing the cross section taken along the line I-I of FIG. FIG. 3 is a plan view schematically showing the unfolded and stretched state of the diaper shown in FIG. FIG. 4 is a perspective view schematically showing a manufacturing process of a diaper continuum in the diaper manufacturing process shown in FIG. 1. FIG. 5 is a perspective view schematically showing a laser joining device used as a manufacturing device for a pants-type disposable diaper, which is an embodiment of a manufacturing device for a sheet fusion body of the present invention. FIG. 6 is a perspective view showing a pressurizing unit support member in the apparatus shown in FIG. FIG. 7 is a perspective view showing a pressurizing head in the apparatus shown in FIG. FIG. 8 is a side view showing a pressurizing head in the apparatus shown in FIG. FIG. 9 is a cross-sectional view schematically showing the structure of a cross section of the apparatus shown in FIG. 5 that passes through the rotation axis of the support member. FIG. 10 is a perspective view showing a pressurized state of the sheet laminate using the pressurizing head in the apparatus shown in FIG. FIG. 10 is an enlarged view of a main part showing a pressurized state of a sheet laminate using a pressurizing head in the apparatus shown in FIG.

Hereinafter, the present invention will be described based on the preferred embodiment thereof with reference to the drawings. In the following embodiment, as a sheet fusion body, which is an object of manufacture in the present invention, that is, a sheet fusion body having a sealing edge fused in a state where the edges of a plurality of sheets are overlapped, a pair. The present invention will be described by taking as an example a pants-type disposable diaper provided with an exterior body having a side seal portion.

1 to 3 show a pants-type disposable diaper 1 manufactured according to the present invention. The diaper 1 includes an absorbent main body 2 and an exterior body 3 arranged on the non-skin facing surface side of the absorbent main body 2 and fixing the absorbent main body 2, and is provided on the front body F (ventral portion 1A). A pair of left and right side edge portions A1 and A1 along the vertical direction X of the exterior body 3 and left and right side edge portions B1 and B1 along the vertical direction X of the exterior body 3 in the back body R (dorsal side portion 1B) are joined to each other. Side seals 4, 4 and waist openings 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 vertical direction X corresponding to the front-rear direction of the wearer and a horizontal direction Y orthogonal to the vertical direction X in the plan view in the expanded and extended state as shown in FIG. The diaper 1 can be divided into a crotch portion 1C arranged in the crotch portion of the wearer at the time of wearing, and a ventral side portion 1A and a dorsal side portion 1B located in front of and behind the vertical direction X thereof. The exterior body 3 in the inseam 1C is formed with recesses for forming leg openings 9 and 9 at the left and right side edges along the vertical direction X. Further, as shown in FIG. 3, the diaper 1 can be divided into a front body F and a back body R with a virtual center line CL extending in the horizontal direction Y that divides the diaper 1 into two in the vertical direction X as a boundary.

As shown in FIG. 3, the absorbent main body 2 has a vertically long shape that is relatively long in one direction (vertical direction X), and forms a surface sheet 2a that forms a skin facing surface and a non-skin facing surface. The back surface sheet 2b and the liquid-retaining absorber 2c interposed between the two sheets are provided, and the absorber 2c has a long shape in the same direction as the vertical direction X. The absorbent body 2 is joined to the central portion of the exterior body 3 by a known joining means (adhesive or the like) so that the longitudinal direction thereof coincides with the vertical direction X of the diaper 1 in the expanded and extended state.

As shown in FIGS. 2 and 3, the exterior body 3 is arranged on the inner surface side of the outer layer sheet 31 forming the outer surface of the diaper 1 (the non-skin facing surface of the exterior body 3) and the outer layer sheet 31, and is arranged on the inner surface side of the outer layer sheet 31. It is configured to include an inner layer sheet 32 forming an inner surface (skin facing surface of the exterior body 3) and a plurality of thread-like or band-shaped elastic members 5, 6 and 7 fixed between both sheets 31 and 32 with an adhesive. Has been done. As described above, the exterior body 3 is a sheet laminated body having a structure in which a plurality of sheets are stacked. The exterior body 3 which is a sheet laminated body has a plurality of sheets (outer layer sheet 31 and inner layer sheet 32) and elastic members 5, 6 and 7 as constituent members in the diaper 1. Further, in the diaper 1, the outer layer sheet 31 and the inner layer sheet 32 are bonded to each other at a predetermined portion 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 exterior body 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 the resin material. There is. As an example of the outer layer sheet 31 and the inner layer sheet 32 constituting the exterior body 3, the resin material includes a heat-sealing synthetic resin such as polyethylene, polyethylene terephthalate, and polypropylene, and is a non-woven fabric, a film, or a laminated sheet of a non-woven fabric and a film. And so on. Examples of the non-woven fabric include air-through non-woven fabric, heat roll non-woven fabric, spunlace non-woven fabric, spunbond non-woven fabric, melt blown non-woven fabric and the like.

As shown in FIG. 2, in the pair of side seal portions 4 and 4 in the diaper 1, the edge portion of the exterior body 3 in the front body F and the edge portion of the exterior body 3 in the rear body R are the longitudinal portions of the side seal portions 4, respectively. It has a seal edge portion 41 connected by a continuous linear fusion portion 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 seal portions 4 and 4. In the fused portion 40 of the seal edge portion 41, the constituent resins of the plurality of sheets (outer layer sheet 31, inner layer sheet 32) constituting the exterior body 3 are melted and solidified in a state where the edges are overlapped with each other. It is formed.

The side seal portions 4 of the diaper 1 having the above-described configuration differ in the number of sheets constituting the side seal portion 4 when viewed along the longitudinal direction of the diaper 1. Specifically, the region near the waist opening 8 in the side seal portion 4 is composed of a laminated body of eight sheets, while the region near the leg opening 9 is composed of a laminated body of four sheets. There is. The region in between of them may be composed of a laminate of six sheets. As a result, the thickness of the side seal portion 4 along the longitudinal direction of the side seal portion 4 is partially different when viewed along the longitudinal direction of the diaper 1. Specifically, the thickness of the side seal portion 4 along the longitudinal direction of the side seal portion 4 gradually decreases from one end to the other end.

As shown in FIG. 4, the pants-type disposable diaper 1 having the above configuration includes a step of manufacturing a diaper continuous body 10A including a strip-shaped sheet laminate 10 and a sheet fusion body manufacturing apparatus of the present invention. Using the laser joining device 20 shown in FIG. 5, which is one embodiment, the diaper continuum 10A can be manufactured by a manufacturing method including a step of splitting the diaper continuum 10A into individual diapers 1 by fusing. The diaper continuum 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. Has been done.

In the sheet fusion body manufacturing apparatus of the present invention, the strip-shaped sheet laminate 10 in which a plurality of sheets are stacked is fused at a predetermined pitch over the width direction, and the edges of the plurality of sheets are fused. A sheet fused body having a sealed edge portion fused in a state where the portions are overlapped is manufactured. In the apparatus and method of the present embodiment, the exterior body continuous body having the structure in which the exterior bodies 3 of the individual disposable diapers are connected in the flow direction is the strip-shaped sheet laminated body 10 which is the object of fusing, and the diaper is continuous. The body 10A has a structure in which the absorbent main body 2 is intermittently arranged at predetermined intervals in the flow direction on the strip-shaped sheet laminated body 10. Then, the strip-shaped sheet laminated body 10 in which the absorbent main body 2 is intermittently arranged is fused between the absorbent main bodies 2 adjacent to each other in the flow direction by irradiation with a laser beam to shorten the lengthened sheet laminated body. A disposable diaper 1 including an exterior body 3 which is a body and an absorbent body 2 is obtained.

Specifically, as shown in FIG. 4, the strip-shaped outer layer sheet 31 continuously supplied from the raw fabric roll (not shown) and the strip-shaped outer layer sheet 31 continuously supplied from the raw fabric roll (not shown). The waist 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 gather are stretched between the inner layer sheets 32 to a predetermined elongation rate. Distribute multiple pieces in each state. At this time, the leg elastic member 7 is arranged while forming a predetermined leg circumference pattern via a known swing guide (not shown) that reciprocates in a direction orthogonal to the flow direction of the seat. Further, on the strip-shaped outer layer sheet 31 and the strip-shaped inner layer sheet 32, an adhesive coating machine (FIG. Apply hot melt type adhesive by (not shown). In addition, elastic members such as the waist elastic member 5 and the waistline elastic member 6 are arranged in an extended state so as to straddle the planned formation portion (planned fusing portion) of the side seal portion 4 in both sheets 31 and 32. In this case, it is preferable to apply an adhesive to the portion and its vicinity in order to avoid inconveniences such as significant shrinkage of the elastic member after the division and removal of the elastic member. A hot melt type adhesive is intermittently applied to the waist elastic member 5 and the waist elastic member 6 by an adhesive coating machine (not shown) before being arranged between the sheets 31 and 32. You may.

Then, as shown in FIG. 4, the band-shaped outer layer sheet 31 and the band-shaped outer layer sheet 31 in which the waist elastic member 5, the waistline elastic member 6 and the leg elastic member 7 are sandwiched between the pair of nip rolls 11 and 11 in an extended state. By feeding and pressurizing the inner layer sheet 32, a strip-shaped exterior body 3 in which a plurality of elastic members 5, 6 and 7 are arranged in an extended state is formed between the strip-shaped sheets 31 and 32. Further, in the step of forming the exterior body 3, a plurality of joint portions (not shown) for joining the band-shaped outer layer sheet 31 and the band-shaped inner layer sheet 32 between the two adjacent waist circumference elastic members 6 and 6. Is formed by using a joining means such as a convex roll 12 and a corresponding anvil roll 13.

After that, if necessary, using an elastic member pre-cutting means (not shown), a plurality of waistline elastic members 6 and a plurality of leg elastics are made to correspond to the positions where the absorbent main body 2 described later is arranged. The member 7 is pressed and divided into a plurality of pieces so that the contraction function is not exhibited. Examples of the elastic member precutting means include an elastic member dividing portion used in the method for manufacturing a composite elastic member described in Japanese Patent Application Laid-Open No. 2002-253605.

Next, as shown in FIG. 4, an adhesive such as a hot melt type 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 strip-shaped exterior. It is intermittently supplied and fixed on the inner layer sheet 32 constituting the body 3 (main body fixing step). Then, as shown in FIG. 4, a leg hole LO'is formed inside the annular portion surrounded by the leg portion elastic member 7 in the strip-shaped exterior body 3 in which the absorbent main body 2 is arranged. This leg hole forming step can be carried out by using the same method as the conventional method for manufacturing this kind of article such as a rotary cutter and a laser cutter.

Next, the strip-shaped exterior body 3 is folded in the width direction (direction orthogonal to the transport direction of the exterior body 3). More preferably, as shown in FIG. 4, both side portions 3a and 3a of the strip-shaped exterior body 3 along the transport direction are folded back so as to cover both ends in the longitudinal direction of the absorbent main body 2 so as to cover the longitudinal ends of the absorbent main body 2. After fixing both ends in the direction, the exterior body 3 is folded in half in the width direction together with the absorbent body 2. In this way, the diaper continuous body 10A as the sheet laminated body 10 is obtained.

The diaper continuum 10A thus obtained is supplied to the laser joining device 20. Explaining the laser joining device 20, as shown in FIG. 5, the laser joining device 20 has a first surface 21a facing outward and a second surface 21b located on the opposite side thereof and facing inward. A cylindrical cylinder as a support member for transporting the sheet laminate 10 by rotating in one direction while supporting the strip-shaped sheet laminate 10 on which a plurality of sheets are stacked on the first surface 21a in the longitudinal direction thereof. The roll 21, the laser light irradiation unit 35 arranged on the second surface 21b side of the cylindrical roll 21, and the first surface 21a while moving in the rotation direction K of the cylindrical roll 21 in synchronization with the rotation of the cylindrical roll 21. It is provided with a plurality of pressurizing heads 26 that pressurize the sheet laminate 10 supported by the above from the side facing the first surface 21a toward the first surface 21a side. As described above, in the apparatus and method of the present embodiment, since the strip-shaped sheet laminated body 10 is an exterior body continuous body forming a part of the diaper continuous body 10A, the strip-shaped sheet laminated body 10 is absorbent. The main body 2 is supported on the first surface 21a as a diaper continuous body 10A in which the main body 2 is intermittently arranged, and is conveyed by a cylindrical roll 21. The diaper continuum 10A is turned around 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 is passed through the guide roll 29 to the outside of the device 20. Is sent to.

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

The pressure portion support member 121 has a slit-shaped support member side opening 27 through which the laser beam 30 irradiated from the second surface 21b side can pass. The support member side opening 27 is a slit-shaped 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 its longitudinal direction coincides with the width direction of the strip-shaped sheet laminate 10 and the diaper continuous body 10A, which is more preferable. Extends in a direction parallel to the axial length direction of the axis of rotation 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 pressure portion support member 121 includes an upper surface a forming the first surface 21a of the cylindrical roll 21, a pair of end surfaces c and c located at the circumferential end of the cylindrical roll 21, and a cylindrical roll. A main body portion 122 having a pair of side end faces d and d located at the end portions of the main body portion 122 in the rotation axis direction, and a fixing overhanging portion 123 formed so as to project from the periphery of the lower end portion of the main body portion 122. Have. The main body 122 of the pressurizing portion support member 121 has a cavity inside, and a slit-shaped gap formed in the upper part of the cavity by the two slit forming members 124, 124 is formed with 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 pressure portion support member 121.

The laser light irradiation unit 35 is a galvano scanner (a device having a mirror on the motor shaft) that freely scans the laser light 30, a mechanism for moving the laser light 30 forward and backward in a direction parallel to the rotation axis of the cylindrical roll 21, and a laser. A mechanism for moving the position (irradiation point) of the light 30 on the first surface 21a of the cylindrical roll 21 where the light 30 hits the sheet laminate 10 of the diaper continuous body 10A in the circumferential direction of the cylindrical roll 21, and the circumference of the cylindrical roll 21. It is provided with an adjusting mechanism or the like that keeps the spot diameter of the laser beam 30 constant on the surface. The adjustment mechanism includes a condenser lens. By having such a configuration, the laser light irradiation unit can arbitrarily move the irradiation point of the laser light 30 in both the circumferential direction of the cylindrical roll 21 and the direction orthogonal to the circumferential direction.

As shown in FIGS. 7 and 8, the pressurizing head 26 has a cylindrical sheet laminate 10, that is, a diaper continuous body 10A, which is an object of fusing, at a position corresponding to the above-mentioned support member side opening 27. It is used to pressurize toward the roll 21. The pressure head 26 is arranged at a position on the first surface 21a side of the cylindrical roll 21. Specifically, the pressurizing head 26 presses the diaper continuum 10A supported on the support member side opening 27 of the pressurizing portion support member 121 toward the support member side opening 27 side. It is used and one pressure head 26 is provided for one support member side opening 27. In the laser type joining device 20 shown in FIG. 5, a plurality of pressure heads 26 are arranged. Each pressure head 26 has a rotation axis on an extension of the rotation axis of the cylinder roll 21, and is arranged on the peripheral surface of the second cylinder roll 25 arranged adjacent to the cylinder roll 21. The second cylindrical roll 25 rotates in synchronization with the cylindrical roll 21. In FIG. 5, each pressurizing head 26 is attached to the second cylindrical roll 25, which is a separate member from the cylindrical roll 21, but instead, each pressurizing head 26 is attached to the cylindrical roll 21. It is also possible to attach it.

When the second cylindrical roll 25 rotates in synchronization with the cylindrical roll 21, each pressure 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 circumference of the cylindrical roll 21 is rotated. It is possible to orbit along the peripheral surface of the cylindrical roll 21 in the same direction as the rotation direction of the pressurizing portion support member 121 constituting the portion and at the same speed as the angular velocity of the pressurizing portion support member 121.

The pressurizing head 26 has _a longitudinal direction X1 and _a width direction Y1 orthogonal to the longitudinal direction X1, and has _a vertically elongated shape along the longitudinal direction X1. _The longitudinal direction X1 of the pressure head 26 is orthogonal to the circumferential direction of the cylindrical roll 21, that is, the transport direction of the sheet laminate ₁₀ , and the width direction Y1 thereof is the circumferential direction of the cylindrical roll 21, that is, the sheet stacking. It is arranged so as to face the same direction as the transport direction of the body 10. The pressurizing head 26 includes a pressurizing member 50, a pressurizing mechanism 60, and an arm portion 70. The arm portion 70 is a member that supports the entire pressurizing head 26, and the rear end region 70A along the longitudinal direction X1 of the arm portion 70 has the pressurizing head 26 on the _first surface 21a of the cylindrical roll 21 as described later. On the other hand, it serves as a fulcrum when performing contact / detachment operation, and is coupled to a support portion 24 of a hinge structure described later.

The pressure member 50 has a pressure member side opening 51 that extends in the same direction as the support member side opening 27 extends and is arranged to face the support member side opening 27. The pressurizing member 50 is a member that actually pressurizes the diaper continuum 10A toward the first surface 21a of the cylindrical roll 21 in the pressurizing head 26. The pressurizing member 50 has a main body portion 50A and a pressurizing portion 50B. The main body portion 50A has a longitudinal direction X ₁ and a width direction Y ₁ orthogonal to the longitudinal direction X ₁ , and is composed of a vertically long block body along the longitudinal direction X 1. The main body 50A has a hollow structure inside. Although not shown, this hollow portion has a polygonal cross _- sectional shape and extends along the longitudinal direction X1 of the main body portion 50A. Further, this hollow portion is connected to an air suction device (not shown).

The pressurizing portion 50B includes a pair of local pressurizing members 51B and 51B that constitute the main body portion 50A and approach each other while inclining outward from the tips of both _side walls 51A extending in the longitudinal direction X1. Each local pressure member 51B has _a vertically long plate shape extending in the longitudinal direction X1 and is integrally formed with the side wall 51A of the main body portion 50A. Each local pressure member 51B has _a predetermined thickness along the width direction Y1, and the tip thereof is chamfered to have an acute angle, and the chamfered surface is the pressure surface 52. .. The pressure surface 52 is a flat surface. Each local pressure member 51B is used to locally press the sheet laminate 10 supported on the upper surface a of the pressure portion support member 121 by the pressure surface 52.

The pair of local pressurizing members 51B and 51B are arranged so as to be inclined so as to approach each other from the tips of both side walls 51A of the main body portion 50A, and the pair of pressurizing surfaces 52 and 52 are spaced apart from _each other in the width direction Y1. They are placed in a non _- contact manner and arranged in parallel along the longitudinal direction X1. Therefore, a space is provided between the pair of local pressure members 51B and 51B. This space extends along the longitudinal direction X1 of the pressurizing member ₅₀ and also extends in the thickness direction of the pressurizing member 50. This space communicates with the hollow portion provided inside the main body portion 50A described above. This space is open at the tips of the pair of local pressurizing members 51B, 51B. This opening functions as the pressure member side opening 51.

The pressure member side opening 51 is arranged so as to abut on the upper surface a of the pressure unit support member 121 so as to cover the entire support member side opening 27 in the pressure unit support member 121. That is, the pressure member side opening 51 extends in the same direction as the support member side opening 27 provided in the pressure member support member 121 extends, and is arranged to face the support member side opening 27.

The pressurizing head 26 has a pressurizing mechanism 60 on the back surface of the pressurizing member 50 described above, that is, on the surface opposite to the surface on which the pressurizing member side opening 51 is formed. The pressurizing mechanism 60 is used to apply a pressurizing force to the pressurizing member 50 in a state where the pressurizing head 26 pressurizes the diaper continuum 10A. For this purpose, the pressurizing mechanism 60 includes a pressure applying means 61. Examples of the pressure applying means 61 include, but are not limited to, springs and cylinders. 7 and 8 show a form in which a spring is used as the pressure applying means 61. The spring as the pressure applying means 61 is supported by the support rod 62. One end of the support rod 62 is fixed to the support plate 63. The support plate 63 is located between the pressurizing mechanism 60 and the pressurizing member 50, and forms a part of the pressurizing mechanism 60. The other end side of the support rod 62 penetrates the arm portion 70. The spring as the pressure applying means 61 is urged by the support plate 63 and the arm portion 70, and the urged state is maintained by the fixture 64 attached to the support rod 62. Further, for the purpose of stabilizing the urging state of the spring as the pressure applying means 61, the support plate 63 and the arm portion 70 are supported by a pair of guide members 65, 65, and the spring can be smoothly expanded and contracted. It has become like. The pair of guide members 65, 65 sandwich the support rod 62 and are arranged at _front and rear positions along the longitudinal direction X1. One end of the guide member 65 is fixed to the support plate 63, while the other end of the guide member 65 can slide in a through hole (not shown) provided in the arm portion 70.

The support plate 63 in the pressurizing mechanism 60 is provided with a hinge structure 66 on the facing surface 63A with the pressurizing member 50. The hinge structure 66 is provided at a substantially central portion in the extending direction of the pressurizing member ₅₀ , that is, in the direction along the longitudinal direction X1. The pressurizing member 50 is supported by the hinge structure 66. As a result, the pressurizing member 50 can swing like a seesaw in front of or behind the hinge structure 66 with the hinge structure 66 as a fulcrum. Here, the _front and the rear are directions along the longitudinal direction X1 with the hinge structure 66 interposed therebetween. That is, the pressurizing member 50 can swing in the pressurizing direction on one end side or the rear end side in the extending direction of the pressurizing member 50 with the hinge structure 66 as a fulcrum.

The pressurizing member 50 and the pressurizing mechanism 60 are connected by a pair of connecting members 67a and 67b at positions on one end side and the other end side in the extending direction of the pressurizing member 50 with the hinge structure 66 interposed therebetween. As the connecting members 67a and 67b, for example, elastically deformable members are preferable, and for example, a spring can be used, but the connecting members are not limited to this. _The connecting members 67a and 67b are arranged at positions substantially equidistant in the longitudinal direction X1 with the hinge structure 66 interposed therebetween. The connecting members 67a and 67b are pressurized by the protrusion 68 provided on the surface facing the pressure member 50 in the support plate 63 and the protrusion 53 provided on the surface facing the support plate 63 in the pressure member 50. It is fixed and urged between the member 50 and the pressurizing mechanism 60. As described above, the pressurizing member 50 is swingable like a seesaw, whereas the connecting members 67a and 67b are deformable as the pressurizing member 50 swings like a seesaw. In the illustrated embodiment, since the connecting members 67a and 67b use springs that are elastically deformable, the connecting members 67a and 67b are elastically deformed as the pressurizing member 50 swings like a seesaw. ..

FIG. 9 shows how the pressure head 26 having the above configuration is operated. FIG. 9 schematically shows a main part of the cross section of the laser type joining device 20. The figure is a vertical cross-sectional view passing through the rotation axis of the cylindrical roll 21. As shown in the figure, the arm portion 70 of the pressurizing head 26 is a rear end in the longitudinal direction X ₁ , in other words, the extension direction of the pressurizing member side opening 51 provided in the pressurizing head 26. The end region 70A is coupled to the support portion 24 of the hinge structure. The support portion 24 is attached to the second cylindrical roll 25. The pressurizing head 26 is capable of swinging in a plane passing through the rotation axis of the cylindrical roll 21, for example, in the paper surface in FIG. 9, with the support portion 24 as a fulcrum. As shown in FIG. 9, the range in which the pressure head 26 swings is such that the pressure surface 52 of the pressure head 26 is sufficiently separated from the peripheral surface of the cylindrical roll 21 and introduced into the peripheral surface of the cylindrical roll 21. The pressure surface 52 is the peripheral surface of the cylindrical roll 21 from a state in which the pressure head 26 shown on the upper side is orthogonal to the peripheral surface of the cylindrical roll 21 in the state of not interfering with the diaper continuous body 10A (for example, in FIG. 9). It is the range up to the state parallel to (the state shown on the lower side in FIG. 9). Within this swing range, the pressurizing head 26 swings while orbiting along the peripheral surface of the cylindrical roll 21, and while the pressurizing head 26 orbits, the pressurizing head 26 is the first of the cylindrical rolls 21. The contact / detachment operation is repeated with respect to the surface 21a.

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

Instead of swinging the pressurizing head 26, another motion is performed to rotate the pressurizing head 26 while the pressurizing head 26 orbits along the peripheral surface of the cylindrical roll 21. It is also possible to perform a contact / separation operation with respect to the first surface 21a of the roll 21. For example, the pressurizing head 26 can be configured to be able to reciprocate along the radial direction of the cylindrical roll 21. By doing so, while the pressurizing head 26 orbits along the peripheral surface of the cylindrical roll 21, the pressurizing head 26 reciprocates along the radial direction of the cylindrical roll 21, thereby applying the pressure. The pressure head 26 repeats the contact / detachment operation with respect to the first surface 21a of the cylindrical roll 21. The means for reciprocating the pressurizing head 26 is the same as the means for swinging the pressurizing head 26, and for example, a cam mechanism, a cylinder mechanism, or a servomotor may be used.

10 and 11 show a state in which the diaper continuum 10A is fused to produce a pants-type disposable diaper as a sheet fusion body. The diaper continuum 10A differs in the number of sheets constituting the diaper side seal portion formation planned area 4A when viewed along the direction _Y2 orthogonal to the transport direction. Specifically, the number of sheets constituting the area near the waist opening planned area 8A in the side seal forming planned area 4A constitutes the area near the leg opening forming planned area 9A in the side seal forming planned area 4A. It is more than the number of sheets to be used. As a result, the thickness of the _side seal portion planned formation area 4A along the extending direction Y2 of the planned area 4A is partially different. Specifically, the thickness of the planned _side seal portion formation area 4A along the extending direction Y2 of the planned area 4A is stepwise from the waist opening planned formation area 8A side toward the leg opening forming planned area 9A side. Has decreased to.

In this way, when the planned side seal portion formation area 4A having a partially different thickness is pressurized by using the pressurizing head 26, if the direction of the pressurizing surface 52 is set parallel to the peripheral surface of the cylindrical roll 21, the side is sided. Of the area 4A where the seal portion is planned to be formed, the region having a large thickness is strongly pressurized, and the region having a small thickness is weakly pressurized. That is, the pressure applied by the pressurizing head 26 acts unevenly on the side seal portion formation planned area 4A. As a result, the adhesion between the sheets constituting the planned side seal portion formation area 4A becomes non-uniform, and due to this, the laser beam 30 does not successfully fusing, and the side seal has sufficient strength. Part 4 may not be formed. On the other hand, according to the present embodiment, since the pressurizing member 50 in the pressurizing head 26 can swing like a seesaw with the hinge structure 66 as a fulcrum, the extending direction Y ₂ of the planned side seal portion forming area 4A. The pressure member 50 can be tilted according to the thickness along the line to pressurize the side seal portion formation planned area 4A. Moreover, a pressurizing mechanism 60 is provided on the back surface of the pressurizing member 50, and the pressurizing mechanism 60 controls the pressurizing force in the pressurization by the entire pressurizing head 26. It is possible to more reliably incline the pressure member 50 according to the thickness along the extending direction Y ₂ . As a result, a uniform pressing force can be applied over the entire area of the extending direction Y ₂ of the side seal portion planned formation region 4A. As a result, the adhesion between the sheets constituting the planned side seal portion formation area 4A becomes good, and due to this, the fusing by the laser beam 30 is successfully performed, and the side seal portion having sufficient strength. 4 is formed.

From the viewpoint of further enhancing the above advantages according to the present embodiment, the connecting members 67a and 67b in the pressurizing head 26 can be deformed with a force smaller than the pressing force applied by the pressurizing mechanism 60. Is preferable. By doing so, when the pressure is applied by the pressure head 26, the connecting members 67a and 67b are deformed and the pressure member 50 is like a seesaw before the spring provided in the pressure mechanism 60 is elastically deformed. It swings to and tilts according to the thickness of the planned side seal portion formation area 4A. Due to this, non-uniformity of the pressure distribution in the planned side seal portion formation region 4A due to the deformation of the connecting members 67a and 67b is effectively prevented, and each of the side seal portion planned formation regions 4A is formed. The adhesion between the sheets is further improved. In this case, it is sufficient that at least one of the two connecting members 67a and 67b can be deformed with a force smaller than the pressing force applied by the pressurizing mechanism 60, and preferably both of the two connecting members 67a and 67b. However, it can be deformed with a force smaller than the pressing force applied by the pressurizing mechanism 60.

The above-mentioned "pressurizing force applied by the pressurizing mechanism 60" is a force for compressing the side seal portion formation planned area 4A, for example, a reaction force against deformation of the spring and a compressive force applied by the cylinder. Is. Further, "the connecting members 67a and 67b can be deformed with a force smaller than the pressing force applied by the pressurizing mechanism 60" means that the side seal portion formed by the deformation of the connecting members 67a and 67b is formed. It means that the pressing force applied to the planned area 4A is smaller than the pressing force applied by the pressurizing mechanism 60. By making the connecting members 67a and 67b deformable with a force smaller than the pressing force applied by the pressurizing mechanism 60, the influence of the pressing force by the connecting members 67a and 67b is affected by the side seal. Since it is smaller than the force for compressing the planned portion formation region 4A, there is an advantage that the distribution of the pressing force is unlikely to be uneven.

The pressurizing head 26 is provided with a pair of connecting members 67a located in front of the hinge structure 66 and a connecting member 67b located rearward. The forces required for their deformation may be the same or different. By making the forces required for deformation of both connecting members 67a and 67b different, elastic deformation force corresponding to the thickness of the planned side seal portion forming area 4A is applied to each connecting member 67a and 67b, and the side seal portion planned forming area 4A is applied. A more uniform pressing force can be applied over the entire area of the extending direction Y ₂ .

While the planned area 4A for forming the side seal portion in the diaper continuous body 10A is pressurized by the pressure head 26, the planned area 4A is irradiated with the laser beam 30 to stack the sheets constituting a part of the diaper continuous body 10A. The body 10 is divided into individual diapers 1 by fusing in the width direction at a predetermined pitch, and at the same time, the cut edges of a plurality of sheets generated by the division are fused to form a sealing edge. A pair of side seal portions 4, 4 are formed. By doing so, a pants-type disposable diaper 1 having an exterior body 3 as a "sheet fusion body having a sealed edge fused in a state where the edges of a plurality of sheets are overlapped" is continuously manufactured. do.

As described above, according to the present invention, the pressurizing head 26 has the pressurizing member 50 and the pressurizing mechanism 60 separately, and the roles of both are separated, so that the thickness of the sheet laminate is partially increased. Even if they are different, the sheets in the laminated sheet can be reliably fused to each other. Other points not particularly described with respect to the present invention, for example, details of the contact / detachment operation of the pressurizing head 26, are described in, for example, Japanese Patent Application Laid-Open Nos. 2015-85652 and 2017-70464 according to the previous application of the present application. And the matters described in JP-A-2017-104288 and the like are appropriately applied.

Although the present invention has been described above based on the preferred embodiment thereof, the present invention is not limited to the above embodiment. For example, in the above-mentioned laser type joining device 20, the peripheral surface portion of the cylindrical roll 21 is a support member, the rotating shaft is on an extension line of the rotating shaft of the cylindrical roll 21, and the rotating shaft is arranged adjacent to the cylindrical roll 21. Although each pressure head 26 is provided on the peripheral surface of the second cylindrical roll 25, a laser type joining device provided with a flat plate-shaped member may be used instead.

Further, although the embodiment relates to a pants-type disposable diaper as an example of a sheet fusion body, the present invention can be similarly applied to the production of other forms of a sheet fusion body.

With respect to the above-described embodiment, the present invention further discloses the following sheet fusion body manufacturing apparatus and manufacturing method.
<1>
A sheet fused body manufacturing device having a sealed edge fused in a state where the edges of a plurality of sheets are overlapped with each other.
A support member having a first surface and a second surface located on the opposite side thereof, and supporting a strip-shaped sheet laminate having a plurality of sheets containing a resin material at least partially on the first surface.
A laser light irradiation unit arranged on the second surface side of the support member is provided.
The support member has a slit-shaped opening that is long in the width direction of the sheet laminate and allows the laser light emitted from the second surface side to pass through.
A pressure head that pressurizes the sheet laminate toward the support member at a position corresponding to the slit-shaped opening is arranged at a position on the first surface side of the support member.
The pressurizing head extends in the same direction as the extending direction of the slit-shaped opening and pressurizes the sheet laminate toward the support member, and is arranged on the back surface of the pressurizing member. It has a pressurizing mechanism that applies pressurizing force to the pressurizing member.
The pressurizing member is supported by a hinge structure provided in the pressurizing mechanism at a substantially central portion in the extending direction of the pressurizing member, and one end side in the extending direction of the pressurizing member with the hinge structure as a fulcrum. Or the other end side can swing in the pressurizing direction,
The pressurizing member and the pressurizing mechanism are connected by connecting members at positions on one end side and the other end side in the extending direction of the pressurizing member.
The connecting member is a device for manufacturing a sheet fusion body, which is deformable as the pressure member swings.

<2>
The apparatus for manufacturing a sheet fused body according to <1>, wherein the connecting member can be deformed with a force smaller than the pressing force applied by the pressurizing mechanism.
<3>
The apparatus for manufacturing a sheet fused body according to the above <1> or <2>, wherein the connecting member is a spring.
<4>
The connecting member located on one end side in the extending direction of the pressurizing member and the connecting member located on the other end side in the extending direction of the pressurizing member differ in the force required for deformation. > To the sheet fused body manufacturing apparatus according to any one of <3>.
<5>
The apparatus for manufacturing a sheet fused body according to any one of <1> to <4>, wherein the pressurizing mechanism includes a spring or a cylinder.
<6>
The support member comprises a cylinder that has a first surface facing outward and a second surface facing inward and is rotatable in one direction.
A plurality of slit-shaped openings extending in a direction parallel to the axial length direction of the rotation axis of the cylinder are provided on the peripheral surface of the cylinder at predetermined intervals in the circumferential direction of the cylinder.
The pressurizing head can orbit along the peripheral 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 pressurizing head repeats the contact / detachment operation with respect to the first surface of the support member while the pressurizing head orbits along the peripheral surface of the support member. <1> Or the apparatus for manufacturing a sheet fused body according to any one of <5>.

<7>
The pressurizing head can swing in a plane passing through the rotation axis of the support member with one end in the extending direction of the slit-shaped opening as a fulcrum, whereby the pressurizing head can move. The device for manufacturing a sheet fused body according to <6>, which is configured to perform contact / detachment operation with respect to the first surface of the support member.
<8>
The pressurizing head is capable of reciprocating along the radial direction of the support member, whereby the pressurizing head moves in contact with and detaches from the first surface of the support member. The apparatus for manufacturing a sheet fused body according to <6>.
<9>
The <1> to <8. > The apparatus for manufacturing a sheet fused body according to any one of 1.
<10>
The pressurizing member has a main body portion and a pressurizing portion.
The apparatus for manufacturing a sheet fused body according to any one of <1> to <9>, wherein the main body has a hollow structure inside.
<11>
The sheet fusion according to <10>, wherein the pressurizing portion comprises a pair of local pressurizing members that constitute the main body portion and approach each other while inclining outward from the tips of both side walls extending in the longitudinal direction. Body manufacturing equipment.

<12>
The apparatus for manufacturing a sheet fusion body according to any one of <1> to <11>, wherein the connecting member is arranged at positions substantially equidistant in the longitudinal direction with the hinge structure interposed therebetween.
<13>
A method for manufacturing a sheet fused body having a sealed edge fused in a state where the edges of a plurality of sheets are overlapped with each other.
A strip-shaped sheet laminate in which a plurality of sheets containing at least a resin material are stacked is supported on the first surface of the support member having the first surface and the second surface located on the opposite side thereof.
The support member is pressed from the laser light irradiation unit arranged on the second surface side of the support member under a state in which the sheet laminate is pressurized toward the support member along the width direction of the sheet laminate by the pressurizing head. The sheet laminate supported on the first surface of the sheet is irradiated with a laser beam to divide the sheet laminate in the width direction, and at the same time, the edges of the division are fused in an overlapping state. A step of manufacturing a sheet fusion body having the seal edge portion is provided.
A method for manufacturing a sheet fusion body, in which a pressurizing member in the pressurizing head can be swung and the pressurizing member is tilted according to a thickness along the width direction of the sheet laminate to pressurize the sheet laminate. ..
<14>
The pressurizing member is supported by a hinge structure provided in the pressurizing mechanism of the pressurizing head at a substantially central portion in the extending direction of the pressurizing member.
The pressurizing member and the pressurizing mechanism are sandwiched by the hinge structure and are connected by a pair of connecting members at positions on one end side and the other end side in the extending direction of the pressurizing member.
The method for manufacturing a sheet fusion body according to <13>, wherein the connecting member is deformed with a force smaller than the pressing force applied by the pressurizing mechanism.
<15>
The method for manufacturing a sheet fusion body according to <14>, wherein a spring is used as the connecting member and elastically deformed as the pressure member swings.
<16>
The method for manufacturing a sheet fused body according to <14> or <15>, wherein the pair of connecting members are elastically deformed as the pressure member swings, using members having different forces required for deformation.

<17>
The method for manufacturing a sheet fusion body according to any one of <14> to <16>, wherein the pressurizing mechanism includes a spring or a cylinder to pressurize the sheet laminate.
<18>
The support member comprises a cylinder that has a first surface facing outward and a second surface facing inward and is rotatable in one direction.
A plurality of slit-shaped openings extending in a direction parallel to the axial length direction of the rotation axis of the cylinder are provided on the peripheral surface of the cylinder at predetermined intervals in the circumferential direction of the cylinder.
The pressurizing head can orbit along the peripheral 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 above-mentioned <13> to any one of <17>, wherein the contact / detachment operation with respect to the first surface of the support member is repeatedly performed while the pressurizing head orbits along the peripheral surface of the support member. A method for manufacturing a sheet fusion body.
<19>
The pressurizing head makes a swinging motion in a plane passing through the rotation axis of the support member with one end in the extending direction of the slit-shaped opening as a fulcrum, whereby the pressurizing head of the support member. The method for manufacturing a sheet fused body according to <18>, wherein the sheet fused body is brought into contact with and separated from the first surface.
<20>
The above <18> or <19>, wherein the pressure head is reciprocated along the radial direction of the support member to cause the pressure head to move in contact with and detach from the first surface of the support member. A method for manufacturing a sheet fused body.

<21>
The method for manufacturing a sheet fusion body according to any one of <13> to <20>, which comprises a step of transporting the sheet laminate while being supported by the first surface of the support member.
<22>
The method for manufacturing a sheet fused body according to any one of <13> to <21>, which uses the sheet laminated body having a different number of laminated sheets when viewed along a direction orthogonal to the transporting direction. ..

1 Pants-type disposable diaper (sheet fusion body)
2 Absorbent body 3 Exterior body 31 Outer layer sheet 32 Inner layer sheet 4 Side seal part 40 Fusion part 41 Seal edge part 5, 6, 7 Elastic member 10 Sheet laminate 10A Diaper continuum 20 Laser type joining device (sheet fusion body) Manufacturing equipment)
21 Cylindrical roll 121 Pressurizing part support member 27 Slit-shaped support member side opening (laser light transmitting part)
30 Laser light 35 Laser light irradiation part 50 Pressurizing member 52 Pressurizing surface 60 Pressurizing mechanism 61 Pressure applying means 62 Support rod 63 Support plate 64 Fixture 65 Guide member 66 Hinge structure 67a, 67b Connecting member 70 Arm

Claims (10)

A sheet fused body manufacturing device having a sealed edge fused in a state where the edges of a plurality of sheets are overlapped with each other.
A support member having a first surface and a second surface located on the opposite side thereof, and supporting a strip-shaped sheet laminate having a plurality of sheets containing a resin material at least partially on the first surface.
A laser light irradiation unit arranged on the second surface side of the support member is provided.
The support member has a slit-shaped opening that is long in the width direction of the sheet laminate and allows the laser light emitted from the second surface side to pass through.
A pressure head that pressurizes the sheet laminate toward the support member at a position corresponding to the slit-shaped opening is arranged at a position on the first surface side of the support member.
The pressurizing head extends in the same direction as the extending direction of the slit-shaped opening and pressurizes the sheet laminate toward the support member, and is arranged on the back surface of the pressurizing member. It has a pressurizing mechanism that applies pressurizing force to the pressurizing member.
The pressurizing member is supported by a hinge structure provided in the pressurizing mechanism at a substantially central portion in the extending direction of the pressurizing member, and one end side in the extending direction of the pressurizing member with the hinge structure as a fulcrum. Or the other end side can swing in the pressurizing direction,
The pressurizing member and the pressurizing mechanism are connected by connecting members at positions on one end side and the other end side in the extending direction of the pressurizing member.
The connecting member is deformable as the pressurizing member swings.
The connecting member located on one end side in the extending direction of the pressurizing member and the connecting member located on the other end side in the extending direction of the pressurizing member differ in the force required for deformation. Body manufacturing equipment. The apparatus for manufacturing a sheet fused body according to claim 1, wherein the connecting member can be deformed with a force smaller than the pressing force applied by the pressurizing mechanism. The apparatus for manufacturing a seat fusion body according to claim 1 or 2, wherein the connecting member is a spring. The apparatus for manufacturing a sheet fusion body according to any one of claims 1 to 3 , wherein the pressurizing mechanism includes a spring or a cylinder. The support member comprises a cylinder that has a first surface facing outward and a second surface facing inward and is rotatable in one direction.
A plurality of slit-shaped openings extending in a direction parallel to the axial length direction of the rotation axis of the cylinder are provided on the peripheral surface of the cylinder at predetermined intervals in the circumferential direction of the cylinder.
The pressurizing head can orbit along the peripheral 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.
Claim 1 to the pressurizing head is such that while the pressurizing head orbits along the peripheral surface of the support member, the pressurizing head repeats the contact / detachment operation with respect to the first surface of the support member. 4. The apparatus for manufacturing a sheet fused body according to any one of 4. The pressurizing head can swing in a plane passing through the rotation axis of the support member with one end in the extending direction of the slit-shaped opening as a fulcrum, whereby the pressurizing head can move. The apparatus for manufacturing a sheet fused body according to claim 5 , wherein the support member is brought into contact with and separated from the first surface. The pressurizing head is capable of reciprocating along the radial direction of the support member, whereby the pressurizing head moves in contact with and detaches from the first surface of the support member. The apparatus for manufacturing a sheet fused body according to claim 5 . A method for manufacturing a sheet fused body having a sealed edge fused in a state where the edges of a plurality of sheets are overlapped with each other.
A strip-shaped sheet laminate in which a plurality of sheets containing at least a resin material are stacked is supported on the first surface of the support member having the first surface and the second surface located on the opposite side thereof.
The support member is pressed from the laser light irradiation unit arranged on the second surface side of the support member under a state in which the sheet laminate is pressurized toward the support member along the width direction of the sheet laminate by the pressurizing head. The sheet laminate supported on the first surface of the sheet is irradiated with a laser beam to divide the sheet laminate in the width direction, and at the same time, the edges of the division are fused in an overlapping state. A step of manufacturing a sheet fusion body having the seal edge portion is provided.
The pressure head extends in the same direction as the extending direction of the slit-shaped opening provided in the support member, which is long in the width direction of the sheet laminate, and the sheet laminate is directed toward the support member. It has a pressurizing member for pressurizing and a pressurizing mechanism arranged on the back surface of the pressurizing member and applying a pressing force to the pressurizing member.
The pressurizing member is supported by a hinge structure provided in the pressurizing mechanism at a substantially central portion in the extending direction of the pressurizing member, and one end side in the extending direction of the pressurizing member with the hinge structure as a fulcrum. Or the other end side can swing in the pressurizing direction,
The pressurizing member and the pressurizing mechanism are connected by connecting members at positions on one end side and the other end side in the extending direction of the pressurizing member.
The connecting member is deformable as the pressurizing member swings.
The connecting member located on one end side in the extending direction of the pressurizing member and the connecting member located on the other end side in the extending direction of the pressurizing member differ in the force required for deformation.
A method for manufacturing a sheet fused body, in which the pressure member is tilted according to the thickness along the width direction of the sheet laminate to pressurize the sheet laminate. The method for manufacturing a sheet fused body according to claim 8 , further comprising a step of transporting the sheet laminated body while supporting the support member on the first surface. The method for manufacturing a sheet fused body according to claim 8 or 9 , wherein the sheet laminated bodies having a different number of laminated sheets when viewed along a direction orthogonal to the transporting direction are used.

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