CN111491782A - Apparatus for manufacturing fused-sheet body, method for manufacturing fused-sheet body, and method for suppressing accumulation of resin fumes - Google Patents

Apparatus for manufacturing fused-sheet body, method for manufacturing fused-sheet body, and method for suppressing accumulation of resin fumes Download PDF

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Publication number
CN111491782A
CN111491782A CN201880082895.4A CN201880082895A CN111491782A CN 111491782 A CN111491782 A CN 111491782A CN 201880082895 A CN201880082895 A CN 201880082895A CN 111491782 A CN111491782 A CN 111491782A
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China
Prior art keywords
sheet
support member
laser light
manufacturing
fused
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Granted
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CN201880082895.4A
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Chinese (zh)
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CN111491782B (en
Inventor
熊谷惠介
千叶祥悟
飞田隆广
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Kao Corp
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Kao Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/16—Removal of by-products, e.g. particles or vapours produced during treatment of a workpiece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36—Removing material
    • B23K26/38—Removing material by boring or cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/70—Auxiliary operations or equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area

Abstract

The invention provides a fuse piece stacked body (10), a device (20) for manufacturing a piece fusion bonded body with a sealing edge part, comprising: a1 st support member (21) and a 2 nd support member (26) each having a laser light passage portion; a laser irradiation unit (35) disposed on one of the two support members; and a reflecting member (50) disposed on the other of the two support members. A laser irradiation unit (35) irradiates the laser beam (30) to the sheet stack (10) sandwiched between the two support members via a laser passage unit (27) on the side of one support member. The laser light (30) that has fused the sheet laminate (10) reaches the reflective member (50) through the laser light passage section (261) on the other support member side and is reflected.

Description

Apparatus for manufacturing fused-sheet body, method for manufacturing fused-sheet body, and method for suppressing accumulation of resin fumes
Technical Field
The invention relates to a device for manufacturing a fused sheet body, a method for manufacturing the fused sheet body and a method for inhibiting resin smoke accumulation.
Background
Conventionally, in a process of manufacturing an absorbent article such as a disposable diaper or a sanitary napkin, a joining apparatus is known which performs a sealing process using a laser while continuously conveying a plurality of superposed sheets. In this bonding apparatus, when a laminate of sheets containing a resin material is irradiated with a laser beam to fuse the sheets, a gas containing resin fumes may be generated. Resin fumes are minute solid particles generated by solidification of vapor of solid matter or chemical reaction of gaseous matter. Resin fumes adhere to the components constituting the bonding apparatus, and if they accumulate, there is a concern that these components may be contaminated or the deposits may be transferred to products, thereby causing defective products.
From the viewpoint of removing resin fumes, for example, the present applicant has previously proposed an apparatus for producing a sheet welded body including a support member for supporting a sheet laminated body and a laser irradiation head, in which an air suction portion for sucking air from an opening provided in the support member in a slit shape is disposed so as to face the opening. According to this manufacturing apparatus, the gas generated by the cutting by the laser beam can be sucked by the air suction unit, and the resin fumes can be removed.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2015-85652
Disclosure of Invention
The invention provides a manufacturing device of a sheet welded body, which fuses a sheet laminated body overlapped with a plurality of sheets to manufacture the sheet welded body with a sealing edge part formed by welding the edge parts of the plurality of sheets in an overlapped state. The manufacturing apparatus includes: a1 st support member and a 2 nd support member each having a laser light passage portion through which laser light can pass; a laser irradiation unit disposed on one member side of the 1 st support member and the 2 nd support member; and a reflecting member that is disposed on the other member side of the 1 st supporting member and the 2 nd supporting member and is capable of reflecting the laser beam. The laser irradiation unit irradiates the sheet laminate sandwiched between the 1 st support member and the 2 nd support member with the laser beam passing through the laser beam passage on the one member side, and the laser beam having melted the sheet laminate reaches the reflection member through the laser beam passage on the other member side and is reflected.
The present invention also provides a method for manufacturing a fused-sheet structure, which includes fusing a laminated sheet structure in which a plurality of sheets are laminated, and manufacturing a fused-sheet structure having a sealed edge portion formed by welding the edges of the plurality of sheets in a laminated state, using the apparatus for manufacturing a fused-sheet structure. The method is a method of manufacturing a fused-sheet structure in which the laser beam having melted the sheet stacked structure passes through the laser beam passage portion on one member side of the 1 st support member and the 2 nd support member and reaches the reflection member to be reflected.
Further, the present invention provides a method for suppressing accumulation of resin smoke, which comprises, when a sheet containing a resin material is sandwiched between two members having a laser light passage portion and the sheet is fused by irradiating laser light from one surface side of the sheet, reflecting the laser light having passed through the laser light passage portion by a reflecting member disposed on the other surface side of the sheet, and suppressing accumulation of resin smoke on the members by the reflected light.
Drawings
Fig. 1 is a perspective view schematically showing a pants-type disposable diaper as an example of a fused-sheet structure manufactured according to the present invention.
Fig. 2 is a sectional view schematically showing an I-I section of fig. 1.
Fig. 3 is a plan view schematically showing an unfolded and stretched state of the diaper shown in fig. 1.
Fig. 4 is a perspective view schematically showing a step of manufacturing a diaper continuous body in the step of manufacturing the diaper shown in fig. 1.
Fig. 5 is a perspective view schematically showing a laser type joining apparatus used as an apparatus for manufacturing a pants-type disposable diaper according to an embodiment of the apparatus for manufacturing a fused-sheet material of the present invention.
Fig. 6 is a partially broken and enlarged perspective view showing a part of the apparatus shown in fig. 5 in an enlarged manner.
Fig. 7 is a perspective view (a) showing a processed portion supporting member and a perspective view (b) showing an inter-processed portion supporting member in the apparatus shown in fig. 5.
Fig. 8 is a perspective view schematically showing the 2 nd support member in the apparatus shown in fig. 5.
Fig. 9 is a sectional view II-II (a) and a sectional view III-III (b) in fig. 8.
Fig. 10 is a sectional view schematically showing a structure of a section through the rotation shaft of the first support member 1 in the apparatus shown in fig. 5.
Fig. 11 is a diagram schematically showing the movement of the irradiation point of the laser beam shown in fig. 5.
Fig. 12 is a diagram schematically showing the movement of the reflected light reflected by the reflecting member shown in fig. 9.
Fig. 13 is a schematic view showing an optical path of the laser beam reflected by the reflecting member in the 2 nd supporting member shown in fig. 8.
Fig. 14(a) and (b) are views corresponding to fig. 13 showing another embodiment of the reflecting member of the present invention.
Fig. 15(a) and (b) are views corresponding to fig. 13 showing an embodiment of a reflecting member having a reflection direction adjusting mechanism.
Fig. 16 is a view corresponding to fig. 13 showing another embodiment of the reflecting member having the reflecting direction adjusting mechanism.
Detailed Description
In the technique of patent document 1, the resin fumes are sucked by the air suction unit, but when the gas containing the resin fumes is diffused over a wide range, it is difficult to suck the resin fumes, and the resin fumes may adhere to the components of the bonding apparatus. When resin fumes adhering to the components are accumulated and the deposits increase, there is a concern that the deposits may fall off during production and mix into products.
Accordingly, the present invention relates to an apparatus for manufacturing a fused-sheet bonded body, a method for manufacturing a fused-sheet bonded body, and a method for suppressing accumulation of resin fumes, which can solve the above-described drawbacks of the conventional techniques.
The present invention will be described below based on preferred embodiments of the present invention with reference to the accompanying drawings. In the following embodiments, the present invention will be described by taking, as an example of a sheet welded body as an object to be manufactured by the present invention, a pants-type disposable diaper including an outer package having a pair of side seals, that is, a sheet welded body having sealed edges formed by welding edges of a plurality of sheets in an overlapped state.
A pants-type disposable diaper 1 manufactured according to the present invention is shown in fig. 1 to 3. The diaper 1 includes an absorbent main body 2 and an outer covering 3, the outer covering 3 fixes the absorbent main body 2 disposed on the non-skin-facing surface side of the absorbent main body 2, and left and right side edge portions Aa and Aa in the longitudinal direction X of the outer covering 3 of the front body portion 1F (front side portion 1A) and left and right side edge portions Bb and Bb in the longitudinal direction X of the outer covering 3 of the rear body portion 1R (back side portion 1B) are joined to form a pair of side seal portions 4 and 4, a waist opening portion 8, and a pair of leg opening portions 9 and 9. The outer package 3 forms the outer surface of the diaper 1.
In the diaper 1, as shown in fig. 3, in a plan view in an unfolded and extended state, the longitudinal direction X corresponding to the front-back direction of the wearer and the lateral direction Y orthogonal thereto are provided, and the diaper 1 can be divided into a crotch portion 1C disposed in the crotch portion of the wearer when worn, and a front side portion 1A and a back side portion 1b positioned in front of and behind the longitudinal direction X, and the outer package 3 of the crotch portion 1C is provided with notch portions for forming the leg opening portions 9, 9 at both left and right side edge portions in the longitudinal direction X, and the diaper 1 can be divided into a front body portion 1F and a rear body portion 1R, as shown in fig. 3, with a virtual center line C L extending in the lateral direction Y dividing the diaper 1 into two portions in the longitudinal direction X.
In the present specification, the skin-facing surface is a surface of the pants-type disposable diaper 1 or a component thereof (e.g., an absorbent body) that faces the skin side of the wearer when worn, and the non-skin-facing surface is a surface of the pants-type disposable diaper 1 or a component thereof that faces the opposite side (the clothing side) to the skin side of the wearer when worn. In the diaper 1, the longitudinal direction X coincides with the direction along the long side (longitudinal direction) of the disposable diaper or the absorbent body 2 as a constituent member thereof, and the lateral direction Y coincides with the width direction of the disposable diaper or the absorbent body 2 as a constituent member thereof.
As shown in fig. 3, the absorbent main body 2 has a longitudinal shape relatively long in one direction (longitudinal direction X), and includes a front sheet 2a forming a skin-facing surface, a back sheet 2b forming a non-skin-facing surface, and a liquid-retentive absorbent body 2c disposed between these two sheets, and the absorbent body 2c has a shape long in the same direction as the longitudinal direction X. The longitudinal direction of the absorbent main body 2 is aligned with the longitudinal direction X of the diaper 1 in the unfolded and extended state, and is joined to the central portion of the outer package 3 by a known joining means (adhesive or the like). Here, the unfolded and stretched state means a state in which the side seal is torn to put the diaper in an unfolded state, and the elastic members of the respective portions are stretched to expand the diaper in the unfolded state to a design size (the same size as when the diaper is expanded to a flat shape while completely eliminating the influence of the elastic members).
As shown in fig. 2 and 3, the exterior body 3 includes: an outer sheet 31 forming an outer surface of the diaper 1 (a non-skin-facing surface of the outer package 3); an inner layer sheet 32 disposed on the inner surface side of the outer layer sheet 31 to form the inner surface of the diaper 1 (the skin-facing surface of the outer package 3); and a plurality of thread-like or band-like elastic members 5, 6, 7 fixed between the two sheets 31, 32 with an adhesive. As described above, the exterior body 3 is a sheet laminate having a structure in which a plurality of sheets are stacked. In the diaper 1, the outer package 3 as a sheet laminate includes a plurality of sheets (an outer sheet 31 and an inner sheet 32) and elastic members 5, 6, and 7 as constituent members. In the diaper 1, the outer sheet 31 and the inner sheet 32 are joined together at predetermined positions by an adhesive, heat seal, or the like (not shown).
The outer layer sheet 31 and the inner layer sheet 32 constituting at least a part of the outer package 3 contain 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. Examples of the outer layer sheet 31 and the inner layer sheet 32 constituting the outer casing 3 include a nonwoven fabric, a film, a laminate sheet of a nonwoven fabric and a film, and the like, which are made of a heat-fusible synthetic resin such as polyethylene, polyethylene terephthalate, polypropylene, and the like as a resin material. Examples of the nonwoven fabric include a hot air nonwoven fabric, a hot roll nonwoven fabric, a spunlace nonwoven fabric, a spunbond nonwoven fabric, and a meltblown nonwoven fabric.
As shown in fig. 2, the pair of side seals 4, 4 in the diaper 1 each have a seal edge 41, and the seal edges 41 are formed by joining the edge of the outer cover 3 of the front body portion 1F and the edge of the outer cover 3 of the rear body portion 1R by a continuous linear fusion-bonded portion 40 extending in the longitudinal direction of the side seal 4. The seal edge portion 41 in the diaper 1 is continuously formed over the entire length between the waist opening 8 and the leg openings 9 in each of the side seals 4, 4. The welded portion 40 of the sealing edge 41 is formed by melting and solidifying the constituent resins of a plurality of sheets (the outer layer sheet 31 and the inner layer sheet 32) constituting the outer package 3 in a state where the edges of these sheets are overlapped.
The pants-type disposable diaper 1 having the above-described structure can be produced by a production method having the following steps, as shown in fig. 4. The manufacturing method comprises the following steps: a step of manufacturing a diaper continuous body 10A including the belt-like sheet laminate 10; and a step of cutting the diaper continuous body 10A into individual diapers 1 by fusing using a laser type joining apparatus 20 shown in fig. 5 as one embodiment of the apparatus for manufacturing a fused-sheet joined body of the present invention. The diaper continuous body 10A has a structure in which a plurality of disposable diapers 1 are connected, more specifically, a structure in which precursors of pants-type disposable diapers in which the side seals 4 are not formed are connected in one direction.
The apparatus for manufacturing a sheet welded body according to the present invention is an apparatus for manufacturing a sheet welded body having a sealed edge portion formed by fusing a band-shaped sheet laminate 10 in which a plurality of sheets are stacked at a predetermined pitch in the width direction thereof, and welding the edges of the plurality of sheets in a stacked state.
In the apparatus and manufacturing method of the present embodiment, the continuous outer package body having the structure in which the outer packages 3 of the respective disposable diapers are connected to each other in the advancing direction is a tape-like sheet laminate 10 as an object to be fused, and the diaper continuous body 10A has the following structure: the absorbent main bodies 2 are disposed at intervals in the running direction of the belt-shaped sheet laminate 10 at predetermined intervals. The disposable diaper 1 including the exterior body 3 and the absorbent bodies 2, which are cut short sheet laminates, can be obtained by fusing the absorbent bodies 2 adjacent to each other in the traveling direction of the tape-like sheet laminate 10 in which the absorbent bodies 2 are arranged at intervals by irradiating laser light.
Next, the laser type bonding apparatus 20 will be explained. The laser bonding apparatus 20 is a manufacturing apparatus for manufacturing a fused-sheet structure of the diaper 1 as a fused-sheet structure by fusing the sheet laminate 10 in which a plurality of sheets are stacked. The laser type joining apparatus 20 is shown in fig. 5, and includes: a1 st support member 21 and a 2 nd support member 26 each having a laser light passage portion through which the laser light 30 can pass; a laser irradiation unit 35 disposed on one of the 1 st support member 21 and the 2 nd support member 26; and a reflecting member 50 which is disposed on the other member side of the 1 st supporting member 21 and the 2 nd supporting member 26 and can reflect the laser beam. The 1 st support member 21 and the 2 nd support member 26 sandwich the sheet stacked body 10 between the two support members 21, 26 to support the sheet stacked body 10. The laser irradiation unit 35 irradiates the sheet laminate 10 sandwiched between the 1 st support member 21 and the 2 nd support member 26 with laser light through a laser light passage portion on the support member side where the laser irradiation unit 35 is disposed. The laser beam 30 irradiated from the laser irradiation unit 35 passes through the laser beam passage portion on the side of the support member opposite to the support member on which the laser irradiation unit 35 is disposed, reaches the reflection member 50, and is reflected to the vicinity of the laser beam passage portion.
The respective parts of the laser type joining apparatus 20 of the present embodiment will be explained in detail.
The laser bonding apparatus 20 of the present embodiment includes a cylindrical roller 21 as a1 st supporting member 21, and conveys the sheet stacked body 10 in the rotation direction R by the rotation of the cylindrical roller 21. The 2 nd supporting member 26 moves in the rotation direction R in synchronization with the rotation of the cylindrical roller 21, and presses the sheet stacked body 10 supported on one surface of the cylindrical roller 21, whereby the sheet stacked body 10 is nipped by the cylindrical roller (1 st supporting member) 21 and the 2 nd supporting member 26. The 1 st support member 21 has a1 st surface 21a and a 2 nd surface 21b located on the opposite side thereof, and supports the sheet stacked body 10 on the 1 st surface 21a over the longitudinal direction thereof. The 2 nd support member 26 is disposed so as to face the 1 st surface 21a of the 1 st support member 21 through the sheet laminate 10, and supports the sheet laminate 10 from the opposite side of the 1 st support member 21. Details of the 2 nd support member 26 will be described later.
As described above, in the manufacturing apparatus and the manufacturing method of the present embodiment, since the belt-shaped sheet laminate 10 is an exterior body continuous body constituting a part of the diaper continuous body 10A, the belt-shaped sheet laminate 10 is supported on the 1 st surface 21a as the diaper continuous body 10A in which the absorbent bodies 2 are arranged at intervals, and is conveyed by the cylindrical roller 21.
As shown in fig. 6 and 7, the cylindrical roller 21 includes a plurality of work support members 121 and a plurality of inter-work support members 131 on a circumferential surface portion thereof, the plurality of work support members 121 being provided at intervals in a circumferential direction of the cylindrical roller 21, and the plurality of inter-work support members 131 being fixed between the plurality of work support members 121 in the circumferential direction. More specifically, the processing section support members 121 and the inter-processing section support members 131 are alternately arranged in the circumferential direction of the cylindrical roller 21, and the circumferential surface portion of the cylindrical roller 21 is formed by the processing section support members 121 and the inter-processing section support members 131. The processing section support member 121 and the inter-processing section support member 131 each form a part of the circumferential surface of the cylindrical roller 21, and are each formed of a metal material such as iron, aluminum, stainless steel, or copper, or a material having heat resistance such as ceramic.
The processing unit support member 121 has a1 st support member side opening 27 through which the laser beam 30 irradiated from the 2 nd surface 21b side can pass. The 1 st supporting member side opening 27 is a laser light passage section of the 1 st supporting member 21 of the present invention. The 1 st supporting member side opening 27 is a slit-shaped opening extending in one direction, more specifically, a slit-shaped opening extending in the intersecting direction S intersecting the conveying direction R of the sheet laminate 10 (the rotating direction R of the cylindrical roll 21), has a rectangular shape in plan view, and extends so that the longitudinal direction thereof coincides with the width direction of the belt-shaped sheet laminate 10 and the diaper continuous body 10A, more preferably coincides with the axial length direction parallel to the rotation axis of the cylindrical roll 21.
As shown in fig. 7(a), the processing unit support member 121 includes: an upper surface a forming a1 st surface 21a of the cylindrical roller 21; a body 122 including a pair of end surfaces c, c located at circumferential ends of the cylindrical roller 21 and a pair of side end surfaces d, d located at ends of the cylindrical roller 21 in the direction of the rotation axis; and a fixing protrusion 123 formed to protrude from the periphery of the lower end portion of the body 122. The main body 122 of the processed portion supporting member 121 has a hollow inside, and a gap in the form of a slit formed by the 2 slit forming members 124, 124 at the upper portion of the hollow becomes the 1 st supporting member side opening 27. That is, the 1 st support member side opening 27 is formed in the upper surface a of the processing unit support member 121. The laser beam 30 can pass through the 1 st supporting member side opening 27. The laser beam 30 irradiated from the laser irradiation unit 35 fuses the sheet laminate 10 supported by the cylindrical roller 21 and the 2 nd support member 26 through the 1 st support member side opening 27.
As shown in fig. 6, the processing unit support member 121 is stretched and fixed between a pair of annular frames 21c (only one is shown) located at both ends of the cylindrical roller 21 in the rotational axial direction. The fixing extensions 123 of the processing unit support member 121 are fixed to the pair of frames 21c at portions located at both ends of the cylindrical roller 21 in the rotation axis direction. As a method of fixing the frame body 21c, any method can be adopted, and for example, a method of placing both end portions of the processing portion support member 121 on an annular flange portion formed on the frame body 21c and fixing them by a fixing member such as a bolt, an adhesive, or fusion bonding; the both end portions of the processing portion support member 121 are fitted and fixed to fitting portions such as annular groove portions formed in the frame body 21c or recessed portions formed at predetermined intervals in the circumferential direction.
On the other hand, as shown in fig. 6 and 7(b), the machining unit support member 121 is fixed to the inter-machining-unit support member 131 by a bolt 140. More specifically, as shown in fig. 7(b), the inter-processing-unit support member 131 is provided with a bolt insertion hole 141, and the bolt 140 is inserted into the bolt insertion hole 141, and the screw thread of the shaft portion 140b is screwed into the screw hole 123a formed in the fixing protrusion 123 of the pair of processing-unit support members 121 located before and after the circumferential direction of the cylindrical roller 21, whereby the inter-processing-unit support member 131 can be fixed between the pair of processing-unit support members 121 of the cylindrical roller 21. Bolt insertion hole 141 preferably has a head housing portion (not shown) so that head 140a of bolt 140 does not protrude from upper surface a of inter-processing-portion support member 131.
As shown in fig. 7(b), the processed inter-section support member 131 has an upper surface a forming the 1 st surface 21a of the cylindrical roller 21, a lower surface b forming the 2 nd surface 21b of the cylindrical roller 21, a pair of end surfaces c, c located at the circumferential end of the cylindrical roller 21, and a pair of side end surfaces d, d located at the end of the cylindrical roller 21 in the rotation axis direction.
The cross-sectional shape of the upper surface a of the processing section supporting member 131 along the circumferential direction of the cylindrical roller 21 is an arc shape of a circle centered on the rotation center line of the cylindrical roller 21.
The upper surface a and the upper surface center portion a1 of the processed portion supporting member 131 are circular arcs of concentric circles centered on the rotation center.
In the present embodiment, the laser irradiation unit 35 is disposed on the 2 nd surface 21b side of the 1 st supporting member 21. The laser irradiation unit 35 may be disposed on the cylindrical roller 21 side as in the present embodiment, or may be disposed on the 2 nd support member 26 side. The laser irradiation unit 35 irradiates the laser beam 30 from the 2 nd surface 21b side of the cylindrical roller 21, and from one surface side of the sheet laminate 10, that is, the opposite side to the surface pressed by the 2 nd support member 26. That is, the sheet laminate 10 is pressed from one surface side thereof by the 2 nd supporting member 26 to sandwich the sheet laminate 10, and the laser beam 30 is irradiated from the other surface side.
The laser irradiation unit 35 is a galvanometer scanner (a device having a mirror attached to a motor shaft) for freely scanning the laser beam 30, and includes: a mechanism for advancing and retreating the laser beam 30 in a direction parallel to the rotation axis of the cylindrical roller 21; a mechanism for moving the position (irradiation point) where the laser beam 30 contacts the sheet laminate 10 of the diaper continuous body 10A supported on the upper surface a of the processing portion supporting member 121 in the circumferential direction R of the cylindrical roller 21; and an adjusting mechanism for keeping the spot diameter of the laser beam 30 constant on the circumferential surface of the cylindrical roller 21. The adjusting mechanism includes a condenser lens. With such a configuration, the laser irradiation unit can move the irradiation point of the laser beam 30 arbitrarily in both the circumferential direction of the cylindrical roller 21 and the direction orthogonal to the circumferential direction.
The 2 nd support member 26 is for pressing the sheet laminate 10 of the diaper continuous body 10A supported in the 1 st support member side opening 27 of the processing portion support member 121 toward the 1 st support member side opening 27, and 1 of the 2 nd support members 26 is provided for 1 of the 1 st support member side openings 27. In the laser joining apparatus 20, a plurality of the 2 nd support members 26 are arranged. Each of the 2 nd support members 26 is disposed on the circumferential surface of the 2 nd cylindrical roller 25, and the 2 nd cylindrical roller 25 has a rotation axis on an extension line of the rotation axis of the cylindrical roller 21 and is disposed adjacent to the cylindrical roller 21. The 2 nd cylindrical roller 25 rotates in synchronization with the cylindrical roller 21. In fig. 5, each of the 2 nd supporting members 26 is attached to the 2 nd cylindrical roller 25 which is a member different from the cylindrical roller 21, but instead of this, each of the 2 nd supporting members 26 may be attached to the cylindrical roller 21.
By rotating the 2 nd cylindrical roller 25 in synchronization with the cylindrical roller 21, the 2 nd supporting members 26 move in the rotation direction R of the cylindrical roller 21 in synchronization with the rotation of the cylindrical roller 21, and can rotate along the circumferential surface of the cylindrical roller 21 in the same direction as the processing portion supporting members 121 constituting the outer circumferential portion of the cylindrical roller 21 at the same speed as the angular speed of the processing portion supporting members 121.
The 2 nd supporting member 26 shown in fig. 8 to 10 has a longitudinal direction X1And a width direction Y orthogonal thereto1Is along the length direction X1Is elongated. The 2 nd support member 26 is disposed in the longitudinal direction X thereof1Perpendicular to the circumferential direction of the cylindrical roller 21, i.e., the conveying direction of the sheet laminate 10, and in the width direction Y thereof1The circumferential direction of the cylindrical roller 21, that is, the conveying direction of the sheet stacked body 10 is the same direction. The 2 nd support member 26 has a main body portion 26A and a pressing portion 26B. Main body part26A has a longitudinal direction X1And a width direction Y orthogonal thereto1From along the length direction X1An elongated block. The main body 26A is arranged in the longitudinal direction X1Has a tip end portion 262a at one end thereof in the longitudinal direction X1Has a rear end 262 b. The rear end portion 262b is connected to the connecting member 263. The body portion 26A has a hollow portion 264 therein. The cross-sectional shape of the hollow portion 264 is a polygon extending along the longitudinal direction X of the body portion 26A1And (4) extending. The hollow portion 264 communicates with the connection member 263 at the position of the rear end portion 262b of the body portion 26A. The laser type joining apparatus 20 of the present embodiment includes a suction device (not shown) that sucks air, and the connection part 263 is connected to the suction device.
As shown in fig. 9 and 8(B), the pressing portion 26B includes a pair of partial pressing members 265, 265 extending from the main body 26A in the longitudinal direction X1The front ends of the extending side walls 26a1 are inclined outward and approach each other. Each local pressing member 265 is in the longitudinal direction X1An elongated plate-like member is formed integrally with the main body 26A. Each partial pressure member 265 extends in the width direction Y1The pressing surface 265A is a chamfered surface having a predetermined thickness and an acute angle formed by chamfering the tip end. The pressing surface 265A is a flat surface. Each of the local pressing members 265 is for locally pressing the sheet laminated body 10 supported on the upper surface a of the processing unit support member 121 by the pressing surface 265A.
The pair of partial pressure members 265, 265 are disposed so as to be inclined from the front ends of the side walls 26A1 of the body portion 26A, and the pair of pressure surfaces 265A, 265A thereof are disposed in the width direction Y1Arranged in a non-contact state with a predetermined interval therebetween and arranged along the longitudinal direction X1Parallel. Thus, a space 265S is provided between the pair of partial pressurizing members 265, 265. The space 265S is along the longitudinal direction X of the 2 nd support member 261And also in the thickness direction of the 2 nd support member 26. The space 265S communicates with the hollow portion 264 provided in the body portion 26A. The space 265S is open at the tip end portions of the pair of partial pressurizing members 265, 265. The opening is used as the 2 nd supporting member sideThe opening 261 functions.
As shown in fig. 8 and 9, the 2 nd support member 26 has a slit-shaped 2 nd support member side opening 261 extending in the same direction as the extending direction of the 1 st support member side opening 27 and disposed to face the 1 st support member side opening 27. The 2 nd supporting member side opening 261 is a laser light passage portion of the 2 nd supporting member 26 of the present invention. The 2 nd support member side opening 261 is disposed so as to cover the entire 1 st support member side opening 27 of the processing unit support member 121, and is disposed in contact with the upper surface a of the processing unit support member 121. In this way, the 2 nd supporting member 26 has the 2 nd supporting member side opening 261 extending in the same direction as the extending direction of the 1 st supporting member side opening 27 provided in the processing unit supporting member 121 through which the laser beam 30 can pass.
The laser bonding apparatus 20 of the present embodiment includes a reflecting member 50 capable of reflecting the laser beam 30. To describe in detail, the laser joining apparatus 20 has the reflecting member 50 that reflects the laser beam 30 in the hollow portion 264 of the body portion 26A of the 2 nd support member 26. The reflecting member 50 may be disposed on the opposite side of the laser irradiation unit 35 with the sheet laminate 10 interposed therebetween. That is, if the laser irradiation unit 35 is disposed on the 1 st support member 21 side, the reflection member 50 is disposed on the 2 nd support member 26 side, and if the laser irradiation unit 35 is disposed on the 2 nd support member 26 side, the reflection member 50 is disposed on the 1 st support member 21 side. The reflecting member 50 is preferably provided at the irradiation destination of the laser beam 30 irradiated from the laser irradiation unit 35. That is, the reflecting member 50 is preferably positioned on the irradiation line of the laser light 30.
The reflecting member 50 has a reflecting surface 51, and the reflecting surface 51 is fixed to the bottom of the hollow portion 264 so as to face the 2 nd supporting member side opening 261 side. In a state where the 1 st support member side opening 27 and the 2 nd support member side opening 261 are disposed to face each other, the irradiated laser beam 30 travels into the hollow portion 264 of the 2 nd support member 26 through these openings 27, 261, and is reflected by the reflection surface 51 of the reflection member 50. The laser beam 37 reflected by the reflection surface 51 travels near the 2 nd supporting member side opening 261, that is, near the laser beam passage portion. Here, the vicinity of the laser light passing portion refers to a portion constituting the periphery of the laser light passing portion and a peripheral portion thereof. The vicinity of the laser light passage portion in the present embodiment is an inner wall on the side of the hollow portion 264 constituting a peripheral portion of the 2 nd supporting member side opening 261, and is an inner wall 265B of the pair of partial pressurizing members 265, 265 and an inner wall of the both side walls 26A1 of the body portion 26A. In this way, the reflecting member 50 reflects the laser light 30 to the vicinity of the laser light passing portion of the supporting member on the side where the reflecting member 50 is arranged.
Fig. 10 shows the operation of the 2 nd support member 26 having the above-described structure. Fig. 10 is a view schematically showing a main part of a cross section of laser type joining apparatus 20. The figure is a longitudinal sectional view through the rotation axis of the cylindrical roller 21. As shown in the figure, the 2 nd support member 26 is arranged in the longitudinal direction X thereof1In other words, the support portion 24 having a hinge structure is provided at the rear end portion 262b, which is one end in the extending direction of the 2 nd support member side opening 261 provided in the 2 nd support member 26. The support portion 24 is attached to the 2 nd cylindrical roller 25. The 2 nd support member 26 can swing in a plane passing through the rotation axis of the cylindrical roller 21, for example, in the paper plane in fig. 10, with the support portion 24 as a fulcrum. As shown in fig. 14, the range of the swing motion of the 2 nd support member 26 is as follows: the range from a state in which the pressing surface 265A of the 2 nd supporting member 26 sufficiently separates the circumferential surface of the cylindrical roller 21 without interfering with the diaper continuous body 10A introduced into the circumferential surface of the cylindrical roller 21 (for example, in a state in which the 2 nd supporting member 26 shown on the upper side is orthogonal to the circumferential surface of the cylindrical roller 21 in fig. 10) to a state in which the pressing surface 265A is parallel to the circumferential surface of the cylindrical roller 21 (a state shown on the lower side in fig. 10). In this oscillation range, the 2 nd support member 26 rotates along the circumferential surface of the cylindrical roller 21 and oscillates, and while the rotation is performed, the partial pressing member 265 of the 2 nd support member 26 repeats the contact/separation operation with respect to the 1 st surface 21a of the cylindrical roller 21.
A known mechanism may be applied to cause the 2 nd support member 26 to swing. For example, a cam mechanism, or a cylinder mechanism, or a servo motor can be used.
The diaper continuous body 10A supported by the 1 st surface 21a of the cylindrical roller 21 is cut into individual diapers 1 (see fig. 5) when it is separated from the cylindrical roller 21. The state of each of the 2 nd supporting members 26 differs depending on the position of the 1 st surface 21a of the cylindrical roller 21. When viewed along the circumferential direction of the cylindrical roller 21, the state of the 2 nd support member 26 is roughly divided into: an open state a, a swing process state (pressing process state) B1, a pressing state C, and a swing process state (open process state) B2. The operation of the 2 nd supporting member 26 is an example of the present invention, and it is needless to say that the 2 nd supporting member 26 performs an operation different from this operation to cut the diaper continuous body 10A.
The open state a roughly coincides with the following range: the diaper 1 as a product is separated from the 1 st surface 21a of the cylindrical roller 21 by a gap and extends to a fan-shaped range where the diaper continuous body 10A as a processing object is supported on the 1 st surface 21a of the cylindrical roller 21. The pressurized state C is a range of the fan shape that is located on the opposite side of 180 degrees from the range of the open state a and has a center angle larger than that of the fan shape of the open state a. The oscillation process state occurs during transition from the open state a to the pressurized state C (the pressurized process state B1 of the oscillation process state) when viewed in the circumferential direction of the cylindrical roller 21, and also occurs during transition from the pressurized state C to the open state a (the open process state B2 of the oscillation process state).
The open state a is a state shown in the upper side of fig. 10 described above, and is a fully open state in which the pressing surface 265A of the 2 nd supporting member 26 is fully opened from the circumferential surface of the cylindrical roller 21. By setting the state of the diaper 1 as a product in the open state a at a distance from the cylindrical roller 21 until the diaper continuous body 10A as a processing object is supported on the 1 st surface 21a of the cylindrical roller 21, the diaper 1 as a product can be easily taken out. Further, the diaper continuous body 10A to be processed can be easily introduced onto the 1 st surface 21a of the cylindrical roller 21.
The pressing state C is a state shown in the lower side of fig. 10, and is a state in which the pressing surface 265A of the 2 nd supporting member 26 is parallel to the circumferential surface of the cylindrical roller 21. When the pressurized state B1 transitions to the pressurized state C, the 2 nd supporting member 26 presses the sheet laminate 10 constituting a part of the diaper continuous body 10A supported on the upper surface a of the processing unit supporting member 121 of the cylindrical roller 21 from the 1 st surface 21a, i.e., from the side opposite to the upper surface a of the processing unit supporting member 121, toward the upper surface a side of the processing unit supporting member 121. In the pressurized state C, the sheet laminate 10 supported on the upper surface a of the processing unit support member 121 of the cylindrical roller 21 is reliably pressurized by the 2 nd support member 26, and fusion-cutting by the laser beam 30 is performed in this pressurized state, so that subsequent fusion-bonding can be smoothly performed.
In the swing process state (pressing process state) B1, the 2 nd supporting member 26 in the open state starts to swing, and the pressing surface 265A of the 2 nd supporting member 26 approaches the 1 st surface 21a of the cylindrical roller 21. On the other hand, in the swing process state (opening process state) B2, the 2 nd supporting member 26 in the pressed state starts to swing, and the pressing surface 265A of the 2 nd supporting member 26 is separated from the 1 st surface 21a of the cylindrical roller 21.
As described above, in the laser joining apparatus 20, when focusing attention on the 1 nd 2 nd support member 26, while the 2 nd support member 26 performs the 1-cycle rotational motion along the circumferential surface of the cylindrical roller 21, the operations of the open state a, the swing process state (pressing process state) B1 in which the pressing is performed, the pressing state C, and the swing process state (open process state) B2 in which the pressing is performed are performed in this order as the 1-cycle operation.
Next, a method of manufacturing a single diaper 1 by cutting the diaper continuous body 10A by fusing the sheet laminate 10 of the diaper continuous body 10A at a portion where the absorbent main body 2 is not present while conveying the diaper continuous body 10A by using the laser bonding apparatus 20 will be described.
The diaper continuous body 10A introduced to the outer peripheral portion of the cylindrical roller 21 is conveyed to the region pressed by the 2 nd support member 26 in a state of being supported on the outer peripheral portion of the cylindrical roller 21, and the laser bonding apparatus 20 irradiates the laser 30 from the laser irradiation portion 35 to the sheet laminate 10 located at the 1 st support member side opening 27 (laser passage portion) of the processing portion support member 121 in the region where the absorbent main body 2 does not exist in the diaper continuous body 10A. That is, the laser irradiation unit 35 irradiates the laser beam to the sheet laminate 10 pressed and sandwiched between the processing unit support member 121 and the 2 nd support member 26 through the 1 st support member side opening 27 of the cylindrical roller 21. At this time, the 1 st supporting member side opening 27 is disposed to face the 2 nd supporting member side opening 261. The laser irradiation unit 35 moves the irradiation point of the laser beam 30 in the longitudinal direction of the 1 st support member side opening 27 by moving the irradiation point of the laser beam 30 in the rotation direction of the cylindrical roller 21 and also in the direction parallel to the rotation axis of the cylindrical roller 21 by control of a control unit, not shown. As a result, the sheet laminate 10 is fused at the position of each of the 1 st supporting member side openings 27, and the cut edge portions of the plurality of sheets generated by the fusion are fused to each other, thereby obtaining a single diaper 1 including the side seal 4 having the seal edge portions formed by fusing the cut edge portions of the plurality of sheets in a state of being overlapped with each other.
The fusing of the laser 30 will be explained. As shown in fig. 11, the laser irradiation unit 35 irradiates one planned cutting portion 10C of the sheet laminate 10 with the laser beam 30 to cut the sheet laminate 10 in the width direction. A portion indicated by a reference numeral P1 in fig. 11 is an irradiation start portion where laser light is first irradiated to one planned cutting portion 10C, and a portion indicated by a reference numeral P2 is an irradiation end portion where laser light irradiation to one planned cutting portion 10C is ended. The laser irradiation unit 35 irradiates the laser beam 30 so that the irradiation point P of the laser beam on the sheet laminate 10 moves simultaneously in both the transport direction R and the intersecting direction S of the sheet laminate 10, and irradiates the laser beam 30 over a range from the irradiation start point P1 to the irradiation end point P2. Thus, the laser irradiation unit 35 moves the irradiation point P of the laser light in the direction (direction S in the drawing) in which the 1 st support member side opening 27 extends, and irradiates the sheet laminate with the laser light through the 1 st support member side opening 27. As a result, the sheet laminate 10 can be cut in the direction orthogonal to the conveying direction R, and sealing edges formed by heat-welding the cut edges can be formed on both sides of the cut portion.
As described above, the laser beam 30 irradiated from the laser irradiation unit 35 passes through the 1 st support member side opening 27, the sheet stacked body 10, and the 2 nd support member side opening 261, and travels into the hollow portion 264 of the 2 nd support member 26. When the laser beam 30 reaches the reflecting member 50, as shown in fig. 13, the laser beam is reflected by the reflecting surface 51 of the reflecting member 50 to the vicinity of the 2 nd supporting member side opening 261. In this way, in the laser bonding apparatus 20, the laser beam 30 with the sheet stack 10 fused off passes through the 2 nd support member side opening 261 of the 2 nd support member 26, reaches the reflection member 50, and is reflected to the vicinity of the 2 nd support member side opening 261. Hereinafter, the laser light reflected by the reflection surface 51 of the reflection member 50 is also referred to as reflected light 37.
As described above, since at least a part of the sheets 31 and 32 used in the outer package 3 of the diaper 1 contains a resin material, resin smoke is generated when the laminate 10 is fused. The resin fumes diffuse in the hollow portion 264 and adhere to the inner wall of the main body portion 26A forming the hollow portion 264. In particular, the adhesive is likely to adhere to the inner wall in the vicinity of the 2 nd supporting member side opening 261. Hereinafter, the resin fumes adhering to the 2 nd support member 26 and the like are also referred to as adhering resin D. When the adhering resin D is deposited and becomes large, the adhering resin D may fall off during production and may be mixed into a product. This may cause a failure in the fused-sheet product obtained by fusing.
The apparatus of the fused-sheet joint of the present invention reflects the laser beam 30 by the reflecting member 50, and the reflected light 37 is irradiated to the inner wall 265B of the local pressing member 265 (see fig. 13) in the vicinity of the opening 261 on the 2 nd supporting member side. This melts the adhering resin D adhering to the inner wall near the 2 nd support member side opening 261 again, thereby suppressing the deposition of the adhering resin D. During the irradiation of the reflected light 37, the resin fumes generated from the adhering resin D irradiated with the reflected light 37 can be prevented from adhering to the vicinity of the 2 nd supporting member side opening 261 again.
In this way, the apparatus for manufacturing a fused-sheet material according to the present invention can effectively suppress the accumulation of resin fumes generated when fusing is performed by a laser. The same effect can be obtained also when the laser irradiation unit 35 is disposed on the 2 nd support member 26 side and the reflecting member 50 is disposed on the 1 st support member 21 side.
FIG. 12 shows the reflection member 50 in which the inner wall 265B of the partial pressure member 265 extends along the extending direction of the 2 nd supporting member side opening 261A trajectory M2 of light 30 reflection and a trajectory M1 of irradiation of laser light 30. The reflecting member 50 of the present embodiment has a structure in which the supporting member 2 is provided in the longitudinal direction X of the supporting member 261The extended reflection surface 51 reflects the laser beam 30 irradiated along the extending direction of the slit-shaped 1 st supporting member side opening 27 so as to move along the extending direction of the 2 nd supporting member side opening 261, that is, along the intersecting direction S. That is, the reflection portion Q in the range to which the reflected light 37 is irradiated moves in the intersecting direction S.
Further, in a state where the 2 nd supporting member 26 is placed such that the 2 nd supporting member side opening 261 faces the upper side in the vertical direction, the reflecting surface 51 is inclined to the inner wall 265B with respect to the vertical direction. Thereby, the reflecting member 50 irradiates the inner wall 265B of one of the partial pressurizing members 265 with the reflected light 37 (see fig. 13).
Since the resin fumes are generated when the fuse sheet stacked body 10 is blown, it is preferable that the reflecting member 50 reflect the laser beam 30 to a position on the rear side of the blowing position with respect to the traveling direction of the irradiation point of the laser beam 30 in the blowing, from the viewpoint of efficiently suppressing the accumulation of the resin fumes near the blowing portion. As described above, the laser beam 30 is moved and irradiated, but as shown in fig. 12, the reflecting member 50 adjusts the angle of the reflecting surface 51 so that the reflecting portion Q is positioned behind the irradiation point P where the laser beam 30 is melted in the traveling direction T of the irradiation point P, and thereby the reflected light 37 is irradiated to the rear side with respect to the traveling direction of the irradiation point of the laser beam 30. In fig. 12, the sheet laminate 10 is irradiated with the reflected light 37 while moving along the intersecting direction S, which is the longitudinal direction of the 2 nd supporting member-side opening 261, following the irradiation point P that is fused in the intersecting direction S.
In the reflecting member 50 of the present embodiment, the reflecting surface 51 faces the inner wall 265B of one partial pressurizing member 265, but from the viewpoint of more reliably suppressing the accumulation of resin fumes in the vicinity of the 2 nd supporting member-side opening 261, the reflecting member may have a plurality of reflecting surfaces 51a as shown in fig. 14 (a). The width direction Y of the 2 nd supporting member 26 of the reflecting member 50a shown in fig. 14(a)1Has a triangular cross-sectional shape in which a base of the triangle is connectedHave the reflection surfaces 51a, respectively. That is, the reflecting member 50a has two reflecting surfaces 51 a. The two reflecting surfaces 51a face the inner wall 256B of the pair of partial pressurizing members 256 so that the reflected light 37 can be irradiated to the inner wall 256B. Thereby, the reflected light 37 is irradiated to both side portions of the 2 nd supporting member 26 along the 2 nd supporting member side opening 261 [ see fig. 14(a) ].
The reflecting member preferably diffusely reflects the laser light 30, from the viewpoint of easily suppressing the accumulation of resin soot spreading over a wide range. As a reflecting member for diffusely reflecting the laser light 30, as shown in fig. 14(b), a member having a reflecting surface 51b with a rough surface is used. In the reflecting member 50b shown in fig. 14(b), the reflecting surface 51b is in the width direction Y with respect to the 2 nd supporting member 261The parallel plane irradiates the 2 nd supporting member side opening 261 and its vicinity with the reflected light 37. Since the surface of the reflecting surface 51b is not smooth and has fine irregularities, the reflected light 37 is scattered in various directions. This causes the reflected light 37 to irradiate the resin smoke spreading over a wide range.
The reflective surface 51b having a non-smooth surface can be obtained by subjecting the surface to a non-smooth surface treatment by sandblasting or a non-smooth surface treatment by thermal spraying of a metal material or a non-metal material.
The reflecting member 50 preferably has a reflection direction adjusting mechanism that changes the reflection direction when the laser light 30 fusing the sheet stacked body 10 is reflected. The reflection direction is the irradiation direction of the reflected light 37. When the reflection direction adjusting mechanism is provided, the accumulation of the resin fumes can be effectively suppressed by changing the reflection direction according to the accumulation portion of the resin fumes.
Fig. 15(a) and (b) and fig. 16 show reflecting members 50c and 50d as examples of the reflecting member 50 including the reflection direction adjusting mechanism.
The reflecting member 50c shown in fig. 15(a) and (b) has a reflecting surface 51 c. The reflecting surface 51c has a shape elongated in the extending direction of the slit-shaped 2 nd supporting member side opening 261. The reflecting member 50c has an inclination angle adjusting portion 53 as a reflection direction adjusting mechanism that adjusts the inclination angle of the reflecting surface 51 c. The inclination angle adjusting unit 53 changes the inclination angle of the reflecting surface 51c with respect to the irradiation direction of the laser beam 30 incident on the reflecting surface 51 c. Thereby, the reflection direction is changed. Hereinafter, the inclination angle of the reflection surface 51c with respect to the irradiation direction of the laser light 30 is referred to as "inclination angle". As shown in fig. 15(a) and (b), the inclination angle is an angle formed by the irradiation direction and the reflection surface 51 in the cross-sectional shape of the reflection surface 51c along the conveyance direction R.
The reclining angle adjusting portion 53 shown in fig. 15(a) and (b) has a pivot shaft 53a that is long in the extending direction of the 2 nd supporting member side opening portion 261, and is rotatable about the pivot shaft 53 a. The inclination angle adjusting unit 53 is provided on a surface of the reflection surface 51c opposite to the surface on which the laser beam 30 is reflected, and rotatably supports the reflection surface 51c by the opposite surface. For example, in the inclination angle adjusting unit 53 shown in fig. 15(a), the reflecting surface 51c is supported at the inclination angle θ 1, and the reflecting surface 51c reflects the laser beam 30 toward one of the inner walls 265B (265B1) of the pair of local pressing members 265, 265. On the other hand, when the inclination angle adjustment unit 53 is rotated to support the reflection surface 51c at the inclination angle θ 2, the reflection surface 51c reflects the laser beam 30 toward the other (265B2) of the inner walls 265B of the pair of partial pressurization members 265, 265.
The reflecting member 50d shown in fig. 16 has a reflecting portion 54 in the circumferential direction of the cross-sectional shape along the conveying direction R, and the reflecting portion 54 includes a plurality of reflecting surfaces 51d and 51e that reflect the laser beam 30 in different directions. The reflection portion 54 has a plurality of convex portions 52 in the circumferential direction of the cross-sectional shape, and two side wall portions formed at the tops of the convex portions 52 are respectively formed as reflection surfaces 51d, 51 e. The two reflection surfaces 51d, 51e forming the top of each convex portion are referred to as a1 st reflection surface 51d and a 2 nd reflection surface 51 e. That is, the reflection portion 54 has the 1 st reflection surfaces 51d and the 2 nd reflection surfaces 51e alternately arranged in the circumferential direction of the cross-sectional shape. Each of the reflecting surfaces 51d and 51e has a shape elongated in the extending direction of the slit-shaped second supporting member side opening 261.
The reflecting member 50d includes a turning portion 55 for turning or rotating the reflecting portion 54 as a reflection direction adjusting mechanism. The rotating portion 55 is formed with a rotating shaft capable of rotating the reflecting portion 54 at substantially the center of the cross-sectional shape along the conveying direction R of the reflecting portion 54. The 1 st and 2 nd reflecting surfaces 51d and 51e have different inclination angles with respect to the radial direction of the reflecting portion 54. By rotating or rotating the reflection unit 54 by the rotation unit 55, the main reflection surface of the laser beam 30 is alternately changed between the 1 st reflection surface 51d and the 2 nd reflection surface 51 e. Specifically, when the reflection surface of the reflected laser beam 30 changes from the 1 st reflection surface 51d forming the top of the 1 convex portion 52 to the 2 nd reflection surface 51e due to the rotation or revolution of the reflection portion 54, the reflection surface sequentially changes from the 1 st reflection surface 51d of the other convex portion adjacent to the convex portion 52 to the 2 nd reflection surface 51 e. This allows the laser light to be reflected in a wide range and without omission in the vicinity of the laser light passage portion.
The reflection direction adjustment mechanism shown in fig. 15 and 16 can be controlled automatically or manually. For example, the reflection direction may be set to be automatically changed according to the number of times the laminated body 10 is cut by the laser light 30. The timing of changing the reflection direction may be set to a timing other than the time of fusing by the laser beam 30 or the time of fusing by the laser beam 30. As such a reflection direction adjustment mechanism, for example, a cam mechanism, a cylinder mechanism, a servo motor, and the like can be used.
The reflecting surface 51 of the reflecting member 50 is a plane mirror as shown in fig. 9(b), and may be a plane mirror in the longitudinal direction X1A curved mirror curved in a manner having a certain curvature. When the reflecting surface 51 is a curved mirror, the reflected light 37 is collected, and therefore the adhering resin D can be effectively removed.
Further, the suction holes 132 are provided in the upper surface a, which is the supporting surface of the supporting sheet laminate 10 of the inter-processing-section supporting member 131 of the laser bonding apparatus 20, so that the sheet laminate 10 supported by the inter-processing-section supporting member 131 is not displaced in the circumferential direction of the cylindrical roll 21 when the pressure is applied by the 2 nd supporting member 26. Each suction hole 132 is connected to an external suction device, not shown, via an air passage provided in the inter-processing-section support member 131 and a suction ring provided on a side surface of the cylindrical roll 21. Further, the suction device is also connected to suck the inside of the hollow portion 264 of the 2 nd support member 26, and resin fumes generated in the hollow portion 264 by fusion can be removed more effectively.
An example of the method for producing the diaper continuous body 10A will be described with reference to fig. 4.
In the method of manufacturing the diaper continuous body 10A shown in fig. 4, a plurality of waist elastic members 5 forming waist gathers, a plurality of waist elastic members 6 forming waist gathers, and a plurality of leg elastic members 7 forming leg gathers are arranged in an extended state after being extended at a predetermined extension rate between a belt-shaped outer sheet 31 continuously supplied from a stock roll (not shown) and a belt-shaped inner sheet 32 continuously supplied from a stock roll (not shown). At this time, the leg elastic members 7 are disposed via a known swing guide (not shown) that reciprocates orthogonally to the sheet running direction while forming a predetermined leg hole pattern. Further, before the belt-shaped outer layer sheet 31 and the belt-shaped inner layer sheet 32 are superposed on each other, a hot-melt adhesive is applied to a predetermined portion of the facing surface of either or both of the two sheets 31 and 32 by an adhesive applicator (not shown). In addition, when the elastic members such as the waist elastic member 5 and the waistline elastic member 6 are disposed in an extended state so as to straddle the formation planned portion (the portion planned to be fused by the laser) of the side seal portions 4 of the two sheets 31 and 32, it is preferable to apply an adhesive agent to the portion and the vicinity thereof in advance in order to avoid problems such as large contraction of the elastic members after the cutting and detachment of the elastic members. The hot melt adhesive may be applied at intervals by an adhesive applicator (not shown) before the waist elastic member 5 and the waistline elastic member 6 are disposed between the two sheets 31, 32.
As shown in fig. 4, the belt-shaped outer sheet 31 and the belt-shaped inner sheet 32, which sandwich the waist elastic member 5, the waistline elastic member 6, and the leg elastic members 7 in an extended state, are fed between the pair of nip rollers 11, 11 and pressed, thereby forming the belt-shaped outer package 3 in which the plurality of elastic members 5, 6, 7 are disposed in an extended state between the belt-shaped sheets 31, 32. In the step of forming the outer package 3, a plurality of joint portions (not shown) for joining the belt-shaped outer layer sheet 31 and the belt-shaped inner layer sheet 32 to each other are formed between the adjacent 2 waist elastic members 6, 6 by using a joining means such as the spur roller 12 and the anvil roller 13 corresponding thereto.
Then, as necessary, the plurality of waist elastic members 6 and the plurality of leg elastic members 7 are pressed and cut into a plurality of pieces so as not to exhibit the contraction function in accordance with the position where the absorbent body 2 is disposed as described below by using an elastic member precut mechanism (not shown). Examples of the elastic member pre-cutting mechanism include an elastic member cutting unit used in the method for manufacturing a composite stretchable member described in japanese patent application laid-open No. 2002-253605.
Next, as shown in fig. 4, an adhesive such as a hot melt adhesive is applied in advance to the absorbent body 2 produced in the other step, and the absorbent body 2 is rotated by 90 degrees and supplied to the inner layer sheet 32 constituting the belt-like outer body 3 at intervals and fixed (body fixing step). thereafter, as shown in fig. 4, a leg hole L O' is formed inside the annular portion annularly surrounded by the leg elastic member 7 in the belt-like outer body 3 in which the absorbent body 2 is arranged.
Next, the belt-shaped package 3 is folded in the width direction (direction orthogonal to the conveying direction of the package 3). More preferably, as shown in fig. 4, both side portions 3a, 3a of the belt-like outer package 3 in the transport direction are folded back so as to cover both longitudinal end portions of the absorbent main body 2 and to fix both longitudinal end portions of the absorbent main body 2, and then the outer package 3 is folded in two in the width direction together with the absorbent main body 2. The diaper continuous body 10A is obtained in this manner. In the diaper continuous body 10A, the continuous body 3C portion of the outer covering 3 excluding the absorbent main body 2 corresponds to the belt-like sheet laminate 10.
In this way, a pants-type disposable diaper 1 having an outer package 3 as a "sheet welded body having sealed edges formed by welding edge portions of a plurality of sheets in a superposed state" is continuously manufactured, by irradiating the diaper continuous body 10A manufactured as described above with a laser beam using the laser type joining apparatus 20, fusing the sheet laminated body 10 constituting a part of the diaper continuous body 10A in the width direction at a predetermined pitch, thereby cutting the diaper continuous body into individual diapers 1, and welding the cut edge portions of the plurality of sheets 31 and 32 generated by the cutting to each other to form a pair of side seal portions 4 and 4 as sealed edge portions.
The laser light irradiated from the laser irradiation unit 35 is a laser light having a wavelength that is absorbed by a sheet constituting the sheet laminate 10 as a workpiece and causes the sheet to generate heat. Here, the "sheet constituting the sheet laminate 10" is not limited to a sheet constituting a surface which is in contact with one surface of the sheet laminate 10, for example, the 1 st surface 21a of the cylindrical roll 21, and any sheet may be used as long as it constitutes the sheet laminate 10. The wavelength at which the laser light irradiated to the sheet laminate 10 is absorbed by each sheet constituting the sheet laminate 10 and then causes the sheet to generate heat is determined by the relationship between the material of the sheet and the wavelength of the laser light used. When the sheet constituting the sheet laminate 10 is a nonwoven fabric or film made of a synthetic resin commonly used for the production of absorbent articles (sanitary products) such as disposable diapers and sanitary napkins, it is preferable to use CO as the laser beam2A laser, a YAG laser, a L D laser (semiconductor laser), a YVO4 laser, a fiber laser, and the like, when the sheet constituting the sheet laminate 10 contains polyethylene, polyethylene terephthalate, polypropylene, or the like as a synthetic resin, a wavelength at which the sheet can generate heat well after being absorbed by the sheet is, for example, preferably 8.0 μm or more and 15 μm or less, and particularly preferably CO in a laser device with high power is used2An oscillation wavelength of the laser light is 9.0 μm or more and 11.0 μm or less. The spot diameter of the laser beam, the laser power, and the like can be appropriately rotated in consideration of the material, thickness, and the like of the sheets constituting the sheet laminate 10.
According to the present invention, there is also provided a method for suppressing accumulation of resin fumes. That is, there is also provided a method of suppressing accumulation of resin smoke in the vicinity of a laser light passage portion in a member having the laser light passage portion by reflecting laser light having passed through the laser light passage portion by a reflecting member disposed on the other surface side of the sheet when the sheet containing a resin material is conveyed while being sandwiched between two members and the sheet is fused by irradiating the sheet with laser light from one surface side thereof. The method of suppressing the accumulation of the resin fumes described herein is not limited to the case of suppressing the resin fumes from adhering, and may be used for removing the resin fumes after adhering. The "laser light passage portion in the member" is not limited to the 1 st supporting member side opening 27 in the above embodiment, and includes the 2 nd supporting member side opening 261.
Although the present invention has been described above based on preferred embodiments of the present invention, the apparatus and method for manufacturing a fused-sheet bonded body according to the present invention are not limited to the above-described embodiments, and can be modified as appropriate.
For example, the support member of the present embodiment is a cylindrical roller, but other forms such as an endless belt may be used instead.
Further, although the reflecting member 50 of the present embodiment is provided in the hollow portion 264 of the 2 nd supporting member 26, the reflecting member is not limited to this as long as it is provided at a position where the laser light passing through the 1 st supporting member side opening 27 and the 2 nd supporting member side opening 261 can be reflected to the vicinity of the 2 nd supporting member side opening 261. For example, in a configuration in which the 2 nd support member 26 does not have the hollow portion 264, by providing the reflecting member 50 on the laser irradiation line on the opposite side of the support sheet laminated body of the 2 nd support member 26, the deposition of the adhering resin D in the vicinity of the 2 nd support member side opening 261 can be suppressed. In this manner, the reflecting member 50 may be provided as a member separate from the 1 st supporting member 21 or the 2 nd supporting member 26.
In the present embodiment, the laser irradiation unit 35 is disposed on the 1 st support member 21 side and the reflection member 50 is disposed on the 2 nd support member 26 side, but the reflection member 50 may be disposed on the 1 st support member 21 side and the laser irradiation unit 35 may be disposed on the 2 nd support member 26 side as long as the deposition of resin fumes near the laser light passage portion (the 1 st support member side opening 27 and the 2 nd support member side opening 261) can be suppressed by the reflected light obtained by reflecting the laser light irradiated from the laser irradiation unit 35 by the reflection member 50.
Although the laser bonding apparatus 20 of the present embodiment performs fusing while conveying the sheet stack 10, fusing may be performed in a state where the sheet stack 10 is left standing. For example, the sheet stacked body 10 may be fused in a state where the conveyance of the sheet stacked body 10 is temporarily stopped.
The sheet welded body to be manufactured is not limited to a pants-type disposable diaper, and any article such as a diaper cover not including an absorbent body can be manufactured.
The embodiment of the present invention further discloses an apparatus for manufacturing a fused-sheet bonded body, a method for manufacturing a fused-sheet bonded body, and a method for suppressing accumulation of resin fumes, which are described below.
<1>
An apparatus for manufacturing a sheet welded body by fusing a sheet laminate in which a plurality of sheets are stacked, and manufacturing the sheet welded body having a sealing edge portion formed by welding edge portions of the plurality of sheets in a stacked state, the apparatus comprising:
a1 st support member and a 2 nd support member each having a laser light passage portion through which laser light can pass;
a laser irradiation unit disposed on one member side of the 1 st support member and the 2 nd support member; and
a reflecting member disposed on the other member side of the 1 st supporting member and the 2 nd supporting member and capable of reflecting the laser beam,
the laser irradiation unit irradiates the sheet laminate sandwiched between the 1 st support member and the 2 nd support member with the laser beam through a laser passage portion on the one member side,
the laser light that has melted the sheet stacked body is reflected by reaching the reflecting member through the laser light passage portion on the other member side.
<2>
The apparatus for manufacturing a fused-sheet structure according to the above <1>, wherein the laser beam fusing the sheet laminate passes through the laser beam passage portion on the other member side, reaches the reflecting member, and is reflected to the vicinity of the laser beam passage portion,
the vicinity of the laser light passage portion is a portion constituting a peripheral edge of the laser light passage portion and a peripheral portion thereof.
<3>
The apparatus for manufacturing a fused-sheet-welded body according to the above <1> or <2>, wherein the laser-light passing portions of the 1 st supporting member and the 2 nd supporting member are slit-shaped openings extending in one direction,
the laser irradiation section irradiates the sheet stacked body with the laser light through the laser light passage section while moving an irradiation point of the laser light in the one direction,
the reflecting member reflects the laser beam to a position behind a fusing position in a traveling direction of an irradiation point of the laser beam when fusing.
<4>
The apparatus for manufacturing a fused-sheet-welded body according to any one of the above <1> to <3>, wherein one of the 1 st supporting member and the 2 nd supporting member is a cylindrical roller,
the other of the 1 st support member and the 2 nd support member has a support portion of a hinge structure at one end thereof,
the other member is configured to be swingable in a plane passing through a rotation shaft of the cylindrical roller.
<5>
The apparatus for manufacturing a fused-sheet structure according to any one of the above <1> to <4>, wherein the other of the 1 st supporting member and the 2 nd supporting member further comprises a cam mechanism, a cylinder mechanism or a servo motor, and the other member is configured to be capable of swinging.
<6>
The apparatus for manufacturing a fused-sheet structure according to any one of the above <1> to <5>, wherein one of the 1 st support member and the 2 nd support member is disposed so as to face the other of the 1 st support member and the 2 nd support member with the sheet stack interposed therebetween.
<7>
The apparatus for manufacturing a fused-sheet structure according to any one of the above <1> to <6>, wherein the other of the 1 st support member and the 2 nd support member has a vertically long main body portion having a longitudinal direction and a width direction orthogonal to the longitudinal direction, and a pressing portion,
the body portion has a hollow portion inside thereof, and a cross section of the hollow portion along the width direction is polygonal in shape and extends in the length direction.
<8>
The apparatus for manufacturing a fused-sheet-welded body according to the above <7>, wherein a connecting member is connected to one end portion in a longitudinal direction of the main body,
the hollow portion communicates with the connecting member at the position of the end portion of the body portion.
<9>
The apparatus for manufacturing a fused-sheet-welded body according to the above <8>, wherein the connecting member is connected to a suction device for sucking air.
<10>
The apparatus for manufacturing a fused-splice body according to any one of the above <7> to <9>, wherein the laser-light passing portions of the 1 st supporting member and the 2 nd supporting member are slit-shaped openings extending in one direction,
the laser light having melted the sheet stacked body passes through the laser light passing portion on the other member side, reaches the reflecting member, and is reflected to the vicinity of the laser light passing portion,
the vicinity of the laser light passage portion is an inner wall of the hollow portion side of a portion constituting a peripheral edge of the opening portion on the side of the other of the 1 st support member and the 2 nd support member.
<11>
The apparatus for manufacturing a fusion-bonded body according to any one of the above <1> to <10>, wherein the reflecting member reflects the laser beam in a plurality of directions.
<12>
The apparatus for manufacturing a fusion-bonded body according to any one of the above <1> to <11>, wherein the reflecting member diffusely reflects the laser light.
<13>
The apparatus for manufacturing a fusion-bonded body according to any one of the above <1> to <12>, wherein the reflecting member includes a reflection direction adjusting mechanism that changes a reflection direction when the laser light fusing the sheet stacked body is reflected.
<14>
The apparatus for manufacturing a fusion-bonded body according to the above <13>, wherein the reflecting member has a reflecting surface that reflects the laser beam,
the reflection direction adjustment mechanism changes the inclination of the reflection surface with respect to the irradiation direction of the laser beam to change the reflection direction of the laser beam.
<15>
The apparatus for manufacturing a fusion-bonded body according to any one of the above <1> to <14>, wherein the reflecting member has a reflecting surface that reflects the laser beam,
the reflection surface is disposed so as to face the laser light passage portion side of the other member.
<16>
The apparatus for manufacturing a fused-sheet structure according to the above <13>, wherein the reflecting member has a reflecting portion including a plurality of reflecting surfaces that reflect the laser beam in different directions,
the reflection direction adjustment mechanism rotates the reflection unit to change the reflection direction of the laser beam.
<17>
The apparatus for manufacturing a fused-sheet structure according to the above <16>, wherein the reflection direction adjustment mechanism is a cam mechanism, a cylinder mechanism, or a servo motor.
<18>
The apparatus for manufacturing a fused-sheet-joined body according to the above <16> or <17>, wherein the reflection direction adjustment mechanism has a rotating portion constituting a rotating shaft capable of rotating the reflection portion,
the angles of inclination of the reflection surfaces adjacent in the direction of rotation of the rotating portion with respect to the diameter direction of the reflecting portion are different from each other.
<19>
The apparatus for manufacturing a fused-sheet structure according to any one of the above <14> to <18>, wherein the surface of the reflecting surface is rough and non-smooth, and the surface has fine irregularities.
<20>
The apparatus for manufacturing a fused-sheet structure according to any one of the above <14> to <19>, wherein the reflecting surface is subjected to sandblasting or non-smooth surface treatment by thermal spraying of a metal material or a non-metal material.
<21>
The apparatus for manufacturing a fused-sheet structure according to any one of the above <14> to <20>, wherein the reflecting surface is curved so as to have a certain curvature in one direction.
<22>
A method of manufacturing a fused-sheet structure, which comprises fusing a laminate of a plurality of sheets stacked together by using the apparatus for manufacturing a fused-sheet structure of any one of the items <1> to <21> to manufacture a fused-sheet structure having a sealing edge portion formed by welding the edge portions of the plurality of sheets in a stacked state,
the laser light having melted the sheet stacked body passes through the laser light passing portion on one member side of the 1 st support member and the 2 nd support member, reaches the reflection member, and is reflected.
<23>
A method for suppressing accumulation of resin smoke, wherein when a sheet containing a resin material is sandwiched between two members having a laser light passage portion and the sheet is fused by irradiating the sheet with a laser light from one surface side thereof, the laser light having passed through the laser light passage portion is reflected by a reflecting member disposed on the other surface side of the sheet, and the accumulation of resin smoke on the members is suppressed by the reflected light.
Industrial applicability of the invention
According to the apparatus for manufacturing a fused-sheet bonded body, the method for manufacturing a fused-sheet bonded body, and the method for suppressing accumulation of resin fumes of the present invention, accumulation of resin fumes generated when fusing is performed by laser can be effectively suppressed.

Claims (23)

1. An apparatus for manufacturing a sheet welded body by fusing a sheet laminate in which a plurality of sheets are stacked, and manufacturing the sheet welded body having a sealing edge portion formed by welding edge portions of the plurality of sheets in a stacked state, the apparatus comprising:
a1 st support member and a 2 nd support member each having a laser light passage portion through which laser light can pass;
a laser irradiation unit disposed on one member side of the 1 st support member and the 2 nd support member; and
a reflecting member disposed on the other member side of the 1 st supporting member and the 2 nd supporting member and capable of reflecting the laser beam,
the laser irradiation unit irradiates the sheet laminate sandwiched between the 1 st support member and the 2 nd support member with the laser beam through a laser beam passage portion on the one member side,
the laser light that has melted the sheet stacked body is reflected by reaching the reflecting member through the laser light passage portion on the other member side.
2. The apparatus for manufacturing a fused-sheet body according to claim 1, wherein:
the laser light having melted the sheet stacked body passes through the laser light passing portion on the other member side, reaches the reflecting member, and is reflected to the vicinity of the laser light passing portion,
the vicinity of the laser light passage portion is a portion constituting a peripheral edge of the laser light passage portion and a peripheral portion thereof.
3. The apparatus for manufacturing a fused-sheet body according to claim 1 or 2, wherein:
the laser beam passing portions of the 1 st support member and the 2 nd support member are slit-shaped openings extending in one direction,
the laser irradiation section irradiates the sheet stacked body with the laser light through the laser light passage section while moving an irradiation point of the laser light in the one direction,
the reflecting member reflects the laser beam to a position behind a fusing position in a traveling direction of an irradiation point of the laser beam when fusing.
4. The apparatus for manufacturing a fused-sheet structure according to any one of claims 1 to 3, wherein:
one of the 1 st supporting member and the 2 nd supporting member is a cylindrical roller,
the other of the 1 st support member and the 2 nd support member has a support portion of a hinge structure at one end thereof,
the other member is configured to be swingable in a plane passing through a rotation shaft of the cylindrical roller.
5. The apparatus for manufacturing a fused-sheet structure according to any one of claims 1 to 4, wherein:
the other of the 1 st support member and the 2 nd support member further includes a cam mechanism, a cylinder mechanism, or a servo motor, and is configured to be capable of swinging the other member.
6. The apparatus for manufacturing a fused-sheet structure according to any one of claims 1 to 5, wherein:
one of the 1 st support member and the 2 nd support member is disposed so as to face the other of the 1 st support member and the 2 nd support member with the sheet laminate interposed therebetween.
7. The apparatus for manufacturing a fused-sheet structure according to any one of claims 1 to 6, wherein:
the other of the 1 st support member and the 2 nd support member has a vertically long main body portion having a longitudinal direction and a width direction orthogonal to the longitudinal direction, and a pressing portion,
the body portion has a hollow portion inside thereof, and a cross section of the hollow portion along the width direction is polygonal in shape and extends in the length direction.
8. The apparatus for manufacturing a fused-sheet body according to claim 7, wherein:
a connecting member is connected to one end portion of the body portion in the longitudinal direction,
the hollow portion communicates with the connecting member at the position of the end portion of the body portion.
9. The apparatus for manufacturing a fused-sheet body according to claim 8, wherein:
the connecting part is connected with a suction device for sucking air.
10. The apparatus for manufacturing a fused-sheet structure according to any one of claims 7 to 9, wherein:
the laser beam passing portions of the 1 st support member and the 2 nd support member are slit-shaped openings extending in one direction,
the laser light having melted the sheet stacked body passes through the laser light passing portion on the other member side, reaches the reflecting member, and is reflected to the vicinity of the laser light passing portion,
the vicinity of the laser light passage portion is an inner wall of the hollow portion side of a portion constituting a peripheral edge of the opening portion on the side of the other of the 1 st support member and the 2 nd support member.
11. The apparatus for manufacturing a fused-sheet structure according to any one of claims 1 to 10, wherein:
the reflecting member reflects the laser light in a plurality of directions.
12. The apparatus for manufacturing a fused-sheet structure according to any one of claims 1 to 11, wherein:
the reflecting member diffusely reflects the laser light.
13. The apparatus for manufacturing a fused-sheet structure according to any one of claims 1 to 12, wherein:
the reflection member includes a reflection direction adjustment mechanism that changes a reflection direction when the laser light fusing the sheet stacked body is reflected.
14. The apparatus for manufacturing a fused-sheet body according to claim 13, wherein:
the reflecting member has a reflecting surface that reflects the laser light,
the reflection direction adjustment mechanism changes the inclination of the reflection surface with respect to the irradiation direction of the laser beam to change the reflection direction of the laser beam.
15. The apparatus for manufacturing a fused-sheet structure according to any one of claims 1 to 14, wherein:
the reflecting member has a reflecting surface that reflects the laser light,
the reflection surface is disposed so as to face the laser light passage portion side of the other member.
16. The apparatus for manufacturing a fused-sheet body according to claim 13, wherein:
the reflecting member has a reflecting portion including a plurality of reflecting surfaces that reflect the laser light in different directions,
the reflection direction adjustment mechanism rotates the reflection unit to change the reflection direction of the laser beam.
17. The apparatus for manufacturing a fused-sheet body according to claim 16, wherein:
the reflection direction adjusting mechanism is a cam mechanism, a cylinder mechanism or a servo motor.
18. The apparatus for manufacturing a fused-sheet body according to claim 16 or 17, wherein:
the reflection direction adjustment mechanism has a rotating portion that constitutes a rotating shaft that can rotate the reflection portion,
the angles of inclination of the reflection surfaces adjacent in the direction of rotation of the rotating portion with respect to the diameter direction of the reflecting portion are different from each other.
19. The apparatus for manufacturing a fused-sheet structure according to any one of claims 14 to 18, wherein:
the reflecting surface has a rough and non-smooth surface and has fine irregularities on the surface.
20. The apparatus for manufacturing a fused-sheet structure according to any one of claims 14 to 19, wherein:
the reflecting surface is subjected to a sandblasting treatment or a non-smooth surface treatment by thermal spraying of a metal material or a non-metal material.
21. The apparatus for manufacturing a fused-sheet structure according to any one of claims 14 to 20, wherein:
the reflecting surface is curved with a curvature in one direction.
22. A method for manufacturing an sheet fusion bonded body, characterized in that:
a fused-sheet structure having a sealing edge portion formed by fusing a laminated sheet structure in which a plurality of sheets are laminated together by using the apparatus for manufacturing a fused-sheet structure according to any one of claims 1 to 21,
the laser light having melted the sheet stacked body passes through the laser light passing portion on one member side of the 1 st support member and the 2 nd support member, reaches the reflection member, and is reflected.
23. A method of inhibiting build-up of resin fumes, comprising:
when a sheet containing a resin material is sandwiched between two members having laser light passing portions, and the sheet is fused by irradiating the sheet with laser light from one surface side thereof, the laser light having passed through the laser light passing portions is reflected by a reflecting member disposed on the other surface side of the sheet, and accumulation of resin fumes on the members is suppressed by the reflected light.
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