JP6830910B2 - Manufacturing method and manufacturing equipment for sheet-shaped members related to absorbent articles - Google Patents

Manufacturing method and manufacturing equipment for sheet-shaped members related to absorbent articles Download PDF

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JP6830910B2
JP6830910B2 JP2017565885A JP2017565885A JP6830910B2 JP 6830910 B2 JP6830910 B2 JP 6830910B2 JP 2017565885 A JP2017565885 A JP 2017565885A JP 2017565885 A JP2017565885 A JP 2017565885A JP 6830910 B2 JP6830910 B2 JP 6830910B2
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二宮 彰秀
彰秀 二宮
正治 冨岡
正治 冨岡
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Uni Charm Corp
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00Bandages or dressings; Absorbent pads
    • A61F13/15Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49Absorbent articles specially adapted to be worn around the waist, e.g. diapers

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Description

本発明は、使い捨ておむつ等の吸収性物品に係るシート状部材の製造方法、及び製造装置に関する。 The present invention relates to a method for manufacturing a sheet-shaped member relating to an absorbent article such as a disposable diaper, and a manufacturing apparatus.

従来、尿などの***物を吸収する吸収性物品の一例として使い捨ておむつがある。そして、かかるおむつの製造には、ホットメルト接着剤等の接着剤で弾性部材が取り付けられて伸縮性が付与されたシート状部材が使用される。 Conventionally, disposable diapers are an example of an absorbent article that absorbs excrement such as urine. Then, in the production of such a diaper, a sheet-like member to which an elastic member is attached with an adhesive such as a hot melt adhesive to impart elasticity is used.

しかし、接着剤で弾性部材を取り付けると、弾性部材の外周面に存在する当該接着剤の硬化に起因して弾性部材の弾性、つまり伸縮性が阻害されたり、シート状部材の柔軟性が阻害される恐れがある。そのため、最近では、接着剤を使用せずに弾性部材をシート状部材に取り付けることが検討されており、その方法の一例として、特許文献1には次のような方法が開示されている。 However, when the elastic member is attached with an adhesive, the elasticity of the elastic member, that is, the elasticity, or the flexibility of the sheet-like member is impaired due to the hardening of the adhesive existing on the outer peripheral surface of the elastic member. There is a risk of Therefore, recently, it has been studied to attach an elastic member to a sheet-shaped member without using an adhesive, and Patent Document 1 discloses the following method as an example of the method.

特表2001−504899号Special table 2001-504899

先ず、図1Aの概略平面図に示すように、搬送方向に連続するシート状部材の連続体31a’において互いに対向する一対の対向面同士の間に搬送方向に連続する弾性部材の連続体35a’を搬送方向に伸長した状態で介挿する。 First, as shown in the schematic plan view of FIG. 1A, in the continuous body 31a'of sheet-like members continuous in the transport direction, the continuous body 35a'of elastic members continuous in the transport direction between a pair of facing surfaces facing each other. Is inserted in a state of being extended in the transport direction.

次に、一対の対向面同士を接合する接合部j’を搬送方向に間隔をあけて複数形成するが、このとき、当該接合部j’を、搬送方向と交差するCD方向において弾性部材の連続体35a’の両側の位置にそれぞれ形成するようにする。 Next, a plurality of joints j'that join the pair of facing surfaces are formed at intervals in the transport direction. At this time, the joints j'are continuously formed in the CD direction that intersects the transport direction. It is formed at positions on both sides of the body 35a'.

そうしたら、シート状部材の連続体31a’を、同連続体31a’における搬送方向の切断対象位置PC’で切断することにより、図1Bに示すように弾性部材35’が取り付けられた単票状のシート状部材31’が生成される。すなわち、この切断に基づいて、切断された弾性部材35’が搬送方向に収縮しつつCD方向に拡大しようとするが、ここで、当該弾性部材35’のCD方向の拡大が、CD方向の両側に位置する接合部j’,j’同士に規制されて、これにより、これら接合部j’,j’で弾性部材35’は、実質的にCD方向に挟圧された状態となる。そして、その結果、当該弾性部材35’がシート状部材31’に取り付けられた状態となる。 Then, the continuous body 31a'of the sheet-shaped member is cut at the cutting target position PC'in the transport direction in the continuous body 31a', so that the elastic member 35'is attached as shown in FIG. 1B. Sheet-shaped member 31'is generated. That is, based on this cutting, the cut elastic member 35'try to expand in the CD direction while contracting in the transport direction, but here, the expansion of the elastic member 35'in the CD direction is performed on both sides in the CD direction. The joint portions j', j'located in the above are restricted to each other, whereby the elastic member 35'is substantially sandwiched in the CD direction by these joint portions j', j'. Then, as a result, the elastic member 35'is attached to the sheet-shaped member 31'.

しかし、かかる弾性部材35’は、上記のような接合部j’,j’同士の挟圧のみに概ね基づいてシート状部材31’に取り付けられている。そのため、その後にシート状部材31’を再伸長等して弾性部材35’を再度伸長した場合に、当該弾性部材35’に作用する上記の挟圧の力が小さくなって接合部j’,j’から弾性部材35’が伸縮方向に滑り得る。そして、仮にその状態で伸長状態を再度緩和すると、滑ってずれた位置のまま弾性部材が接合部j’,j’の挟圧で再度取り付けられてしまって、その結果、シート状部材31’の伸縮性が伸縮方向の全長に亘って略均等な適正状態から、部分的に伸縮性が偏った不適正状態に変化してしまう恐れがある。例えば、シート状部材31’のうちのある部分では伸縮方向の伸縮性が大きいが、ある部分では伸縮性が小さいという具合に、シート状部材31’の伸縮方向の全長に亘って伸縮性が均等に付与できなくなる恐れがある。 However, the elastic member 35'is attached to the sheet-shaped member 31' based on only the pinching pressure between the joint portions j', j'as described above. Therefore, when the elastic member 35'is subsequently re-extended by re-extending the sheet-shaped member 31', the force of the above-mentioned pinching pressure acting on the elastic member 35' becomes smaller, and the joints j', j The elastic member 35'can slide in the expansion / contraction direction. Then, if the extended state is relaxed again in that state, the elastic member is reattached by the pinching pressure of the joints j'and j'while remaining in the slipped and displaced position, and as a result, the sheet-like member 31' There is a risk that the elasticity may change from an appropriate state in which the elasticity is substantially uniform over the entire length in the expansion / contraction direction to an improper state in which the elasticity is partially biased. For example, a part of the sheet-shaped member 31'has a large elasticity in the expansion / contraction direction, but a part has a small elasticity, so that the elasticity is uniform over the entire length of the sheet-like member 31' in the expansion / contraction direction. There is a risk that it cannot be given to.

一方、弾性部材の連続体35a’の搬送方向と直交する断面での形状は、正円ではなく、図1Cのような長手方向を有した形状をなしている場合がある。そのため、この場合には、当該長手方向が、図1DのようにCD方向と直交する方向に向くようにするのではなく、図1EのようにCD方向に向くように弾性部材の連続体35a’の姿勢を変更すれば、接合部j’,j’同士の挟圧を強めることができて、その結果、上記の滑りを抑制可能と考えられる。 On the other hand, the shape of the continuous body 35a'of the elastic member in the cross section orthogonal to the transport direction may not be a perfect circle but may have a shape having a longitudinal direction as shown in FIG. 1C. Therefore, in this case, the continuous body 35a'of the elastic member so that the longitudinal direction faces the CD direction as shown in FIG. 1E, instead of facing the direction orthogonal to the CD direction as shown in FIG. 1D. By changing the posture of, it is possible to increase the pinching pressure between the joints j'and j', and as a result, it is considered that the above slip can be suppressed.

本発明は、上記のような従来の問題に鑑みてなされたものであって、その目的は、弾性部材がシート状部材の接合部から滑ることを抑制することにある。 The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to prevent an elastic member from slipping from a joint portion of a sheet-like member.

上記目的を達成するための主たる発明は、
搬送方向に連続するシート状部材の連続体の互いに対向する一対の対向面同士の間に、前記搬送方向に連続する弾性部材の連続体を介挿した後に、前記シート状部材の連続体を、当該シート状部材の連続体における前記搬送方向の切断対象位置で切断することにより、前記弾性部材が取り付けられた前記シート状部材を製造する方法であって、
前記弾性部材の連続体が軸回りに巻かれてなる非回転の資材コイルから、前記弾性部材の連続体を、前記資材コイルの軸方向に引っ張ることにより、前記弾性部材の連続体を前記搬送方向に繰り出す繰り出し工程と、
前記一対の対向面同士の間に、繰り出された前記弾性部材の連続体を前記搬送方向に伸長した状態で配置する配置工程と、
前記一対の対向面同士を接合する接合部を前記搬送方向に間隔をあけて複数形成する接合部形成工程と、
前記配置工程及び前記接合部形成工程の後で、前記シート状部材の連続体及び前記弾性部材の連続体を、前記切断対象位置で切断することにより、前記シート状部材及び前記弾性部材を生成する切断工程と、を有し、
前記弾性部材の連続体において前記搬送方向と直交する断面での形状は、長手方向と、前記長手方向と交差する方向に前記長手方向よりも長さの短い短手方向と、を有した形状であり、
前記弾性部材の連続体において前記一対の対向面のうちの一方の対向面に対して前記長手方向がなす角度が45°以上の部分を起立状部分とし、前記一方の対向面に対して前記長手方向がなす角度が45°未満の部分を横たわり状部分とした場合に、
前記配置工程では、前記搬送方向の単位長さにおいて前記起立状部分が占める前記搬送方向の長さよりも前記横たわり状部分が占める前記搬送方向の長さの方が長くなるように前記弾性部材の連続体の姿勢を変更しながら、前記一方の対向面に前記弾性部材の連続体を当接し、
前記接合部形成工程では、前記弾性部材の連続体を前記搬送方向に伸長した状態に維持するとともに、前記配置工程で変更後の姿勢に維持しつつ、前記接合部を、前記搬送方向と交差するCD方向において前記弾性部材の連続体の両側の位置にそれぞれ形成し、
前記切断工程の後では、前記搬送方向に収縮しつつ前記CD方向に拡大した前記弾性部材は、前記両側の前記接合部同士で前記CD方向に挟圧されて前記シート状部材に取り付けられていることを特徴とする吸収性物品に係るシート状部材の製造方法である。
また、
搬送方向に連続するシート状部材の連続体の互いに対向する一対の対向面同士の間に、前記搬送方向に連続する弾性部材の連続体を介挿した後に、前記シート状部材の連続体を、当該シート状部材の連続体における前記搬送方向の切断対象位置で切断することにより、前記弾性部材が取り付けられた前記シート状部材を製造する装置であって、
前記弾性部材の連続体が軸回りに巻かれてなる非回転の資材コイルから、前記弾性部材の連続体が、前記資材コイルの軸方向に引っ張られることにより、前記弾性部材の連続体を前記搬送方向に繰り出す繰り出し装置と、
前記一対の対向面同士の間に、繰り出された前記弾性部材の連続体を前記搬送方向に伸長した状態で配置する配置装置と、
前記一対の対向面同士を接合する接合部を前記搬送方向に間隔をあけて複数形成する接合部形成装置と、
前記配置装置及び前記接合部形成装置よりも前記搬送方向の下流側の位置で、前記シート状部材の連続体及び前記弾性部材の連続体を、前記切断対象位置で切断することにより、前記シート状部材及び前記弾性部材を生成する切断装置と、を有し、
前記弾性部材の連続体において前記搬送方向と直交する断面での形状は、長手方向と、前記長手方向と交差する方向に前記長手方向よりも長さの短い短手方向と、を有し、
前記弾性部材の連続体において前記一対の対向面のうちの一方の対向面に対して前記長手方向がなす角度が45°以上の部分を起立状部分とし、前記一方の対向面に対して前記長手方向がなす角度が45°未満の部分を横たわり状部分とした場合に、
前記配置装置は、前記搬送方向の単位長さにおいて前記起立状部分が占める前記搬送方向の長さよりも前記横たわり状部分が占める前記搬送方向の長さの方が長くなるように前記弾性部材の連続体の姿勢を変更しながら、前記一方の対向面に前記弾性部材の連続体を載置し、
前記接合部形成装置は、前記弾性部材の連続体を前記搬送方向に伸長した状態に維持するとともに、前記配置工程で変更後の姿勢に維持しつつ、前記接合部を、前記搬送方向と交差するCD方向において前記弾性部材の連続体の両側の位置にそれぞれ形成し、
前記切断工程よりも前記搬送方向の下流側では、前記搬送方向に収縮しつつ前記CD方向に拡大した前記弾性部材は、前記両側の前記接合部同士で前記CD方向に挟圧されて前記シート状部材に取り付けられていることを特徴とする吸収性物品に係るシート状部材の製造装置である。
本発明の他の特徴については、本明細書及び添付図面の記載により明らかにする。
The main invention for achieving the above object is
After inserting the continuous body of the elastic members continuous in the transport direction between the pair of facing surfaces of the continuous body of the sheet-shaped members continuous in the transport direction, the continuous body of the sheet-like members is inserted. A method of manufacturing the sheet-like member to which the elastic member is attached by cutting at a cutting target position in the transport direction in the continuum of the sheet-like member.
By pulling the continuous body of the elastic member in the axial direction of the material coil from the non-rotating material coil in which the continuous body of the elastic member is wound around the axis, the continuous body of the elastic member is moved in the transport direction. The feeding process and the feeding process
An arrangement step of arranging a continuous body of the elastic members drawn out between the pair of facing surfaces in a state of being extended in the transport direction.
A joint portion forming step of forming a plurality of joint portions for joining the pair of facing surfaces at intervals in the transport direction.
After the arrangement step and the joint forming step, the sheet-shaped member and the elastic member are generated by cutting the continuous body of the sheet-shaped member and the continuous body of the elastic member at the cutting target position. With a cutting process,
The shape of the continuous body of the elastic member in the cross section orthogonal to the transport direction is a shape having a longitudinal direction and a lateral direction having a length shorter than the longitudinal direction in a direction intersecting the longitudinal direction. Yes,
In the continuum of the elastic members, a portion where the angle formed by the longitudinal direction with respect to one of the pair of facing surfaces is 45 ° or more is defined as an upright portion, and the longitudinal portion with respect to the one facing surface. When the part where the angle formed by the direction is less than 45 ° is regarded as the lying part,
In the arrangement step, the elastic member is continuous so that the length in the transport direction occupied by the lying portion is longer than the length in the transport direction occupied by the upright portion in the unit length in the transport direction. While changing the posture of the body, the continuous body of the elastic member is brought into contact with the one facing surface.
In the joint forming step, the continuous body of the elastic members is maintained in a state of being extended in the transport direction, and the joint is intersected with the transport direction while maintaining the posture changed in the arrangement step. Formed at positions on both sides of the continuum of the elastic members in the CD direction, respectively.
After the cutting step, the elastic member that contracts in the transport direction and expands in the CD direction is sandwiched between the joints on both sides in the CD direction and attached to the sheet-like member. This is a method for manufacturing a sheet-like member according to an absorbent article.
Also,
After inserting the continuous body of the elastic members continuous in the transport direction between the pair of facing surfaces of the continuous body of the sheet-shaped members continuous in the transport direction, the continuous body of the sheet-like members is inserted. An apparatus for manufacturing the sheet-shaped member to which the elastic member is attached by cutting at a cutting target position in the transport direction in the continuum of the sheet-shaped member.
The continuous body of the elastic member is conveyed by pulling the continuous body of the elastic member in the axial direction from the non-rotating material coil formed by winding the continuous body of the elastic member around the axis. A feeding device that feeds in the direction and
An arrangement device for arranging a continuous body of the elastic members drawn out between the pair of facing surfaces in a state of being extended in the transport direction.
A joint portion forming device for forming a plurality of joint portions for joining the pair of facing surfaces at intervals in the transport direction.
By cutting the continuum of the sheet-like member and the continuum of the elastic member at the position downstream of the arrangement device and the joint forming device in the transport direction, the sheet-like member is formed. It has a member and a cutting device that produces the elastic member.
The shape of the continuous body of the elastic member in a cross section orthogonal to the transport direction has a longitudinal direction and a lateral direction having a length shorter than the longitudinal direction in a direction intersecting the longitudinal direction.
In the continuum of the elastic members, a portion where the angle formed by the longitudinal direction with respect to one of the pair of facing surfaces is 45 ° or more is defined as an upright portion, and the longitudinal portion with respect to the one facing surface. When the part where the angle formed by the direction is less than 45 ° is regarded as the lying part,
The arrangement device is a continuum of the elastic members so that the length in the transport direction occupied by the lying portion is longer than the length in the transport direction occupied by the upright portion in the unit length in the transport direction. While changing the posture of the body, the continuous body of the elastic member is placed on the one facing surface.
The joint forming device intersects the joint with the transport direction while maintaining the continuous body of the elastic members in a state of being extended in the transport direction and maintaining the posture changed in the arrangement step. Formed at positions on both sides of the continuum of the elastic members in the CD direction, respectively.
On the downstream side in the transport direction from the cutting step, the elastic member that contracts in the transport direction and expands in the CD direction is sandwiched between the joints on both sides in the CD direction to form the sheet. It is an apparatus for manufacturing a sheet-shaped member related to an absorbent article, which is attached to the member.
Other features of the present invention will be clarified by the description in this specification and the accompanying drawings.

本発明によれば、弾性部材がシート状部材の接合部から滑ることを抑制可能となる。 According to the present invention, it is possible to prevent the elastic member from slipping from the joint portion of the sheet-shaped member.

接着剤を用いずに弾性部材35’をシート状部材31’に取り付ける方法の説明図である。It is explanatory drawing of the method of attaching an elastic member 35'to a sheet-like member 31' without using an adhesive. 同説明図である。It is the same explanatory drawing. 弾性部材の連続体35a’の搬送方向と直交する断面での形状が、長手方向を有した形状の一例の説明図である。It is explanatory drawing of an example of the shape which the shape in the cross section orthogonal to the transport direction of the continuum 35a'of an elastic member has a longitudinal direction. 弾性部材の連続体35a’の姿勢の好ましくない例の説明図である。It is explanatory drawing of the unfavorable example of the posture of the continuum 35a'of an elastic member. 同姿勢の好ましい例の説明図である。It is explanatory drawing of the preferable example of the same posture. 吸収性物品の一例としての3ピースタイプのおむつ1の概略斜視図である。It is a schematic perspective view of the 3-piece type diaper 1 as an example of an absorbent article. 展開状態のおむつ1を着用者の肌側から見た概略平面図である。It is a schematic plan view of the diaper 1 in the unfolded state as seen from the skin side of the wearer. 図3中のIVa−IVa断面図、及びIVb−IVb断面図である。FIG. 3 is a sectional view taken along line IVa-IVa and a sectional view taken along line IVb-IVb in FIG. 展開状態の腹側帯部材31を非肌側から見た概略平面図である。It is a schematic plan view which looked at the ventral band member 31 in the unfolded state from the non-skin side. 図6A及び図6Bは、溶着部jが奏する糸ゴム35(45)の取り付け機能の説明図である。6A and 6B are explanatory views of the attachment function of the rubber thread 35 (45) played by the welded portion j. 製造ラインでおむつ1が製造される様子を一部斜視で示す概略平面図である。It is the schematic plan view which shows the state which the diaper 1 is manufactured on a production line by a partial perspective. 図8A、図8B、及び図8Cは、それぞれ、図7中のA部の概略拡大図、B部の概略拡大図、及びC部の概略拡大図である。8A, 8B, and 8C are a schematic enlarged view of a portion A, a schematic enlarged view of a portion B, and a schematic enlarged view of a portion C in FIG. 7, respectively. 第1加工位置PK1でなされる加工処理の説明図であって、同加工処理のメインの装置をなす超音波溶着装置60等をCD方向から見た概略側面図である。It is explanatory drawing of the processing performed at the 1st processing position PK1, and is the schematic side view of the ultrasonic welding apparatus 60 and the like which form the main apparatus of the processing process seen from the CD direction. 図9A中のB−B矢視の概略拡大図である。It is a schematic enlarged view of the arrow BB in FIG. 9A. オーバーエンド解舒方式の繰り出し装置53UWの概略斜視図である。It is a schematic perspective view of the over-end unwinding type feeding device 53UW. 図11Aは、搬送方向と直交する断面での糸ゴムの連続体35aの形状が正円形の場合の説明図であり、図11Bは、同断面での形状が、長手方向を有した形状の一例の説明図である。FIG. 11A is an explanatory view when the shape of the rubber thread continuum 35a in the cross section orthogonal to the transport direction is a perfect circle, and FIG. 11B is an example of the shape in the same cross section having the longitudinal direction. It is explanatory drawing of. 図12Aは、糸ゴムの連続体35aにおける起立状部分35akの定義の説明図であり、図12Bは、同連続体35aにおける横たわり状部分35ayの定義の説明図である。FIG. 12A is an explanatory diagram of the definition of the upright portion 35ak in the continuous body 35a of the rubber thread, and FIG. 12B is an explanatory view of the definition of the horizontal portion 35ay in the continuous body 35a. 糸ゴムの連続体35aにおける捻れ状部分35anを説明するための概略平面図である。It is a schematic plan view for demonstrating the twisted part 35an in the continuum 35a of a rubber thread. 第1糸ゴムの連続体35a1の捻れ状部分35anと第2糸ゴムの連続体35a2の捻れ状部分35anとが搬送方向に関してオーバーラップしていない例の概略平面図である。It is a schematic plan view of the example in which the twisted portion 35an of the continuum 35a1 of the first thread rubber and the twisted portion 35an of the continuum 35a2 of the second thread rubber do not overlap in the transport direction. 捻れ状部分35anの搬送方向の長さの方が、溶着部jの搬送方向の形成ピッチPjよりも大きい例の概略平面図である。FIG. 5 is a schematic plan view of an example in which the length of the twisted portion 35an in the transport direction is larger than the formation pitch Pj of the welded portion j in the transport direction. 捻れ状部分35anとサイドシール部SSとの好ましい位置関係の説明図である。It is explanatory drawing of the preferable positional relationship between a twisted portion 35an and a side seal portion SS.

本明細書及び添付図面の記載により、少なくとも以下の事項が明らかとなる。
搬送方向に連続するシート状部材の連続体の互いに対向する一対の対向面同士の間に、前記搬送方向に連続する弾性部材の連続体を介挿した後に、前記シート状部材の連続体を、当該シート状部材の連続体における前記搬送方向の切断対象位置で切断することにより、前記弾性部材が取り付けられた前記シート状部材を製造する方法であって、
前記弾性部材の連続体が軸回りに巻かれてなる非回転の資材コイルから、前記弾性部材の連続体を、前記資材コイルの軸方向に引っ張ることにより、前記弾性部材の連続体を前記搬送方向に繰り出す繰り出し工程と、
前記一対の対向面同士の間に、繰り出された前記弾性部材の連続体を前記搬送方向に伸長した状態で配置する配置工程と、
前記一対の対向面同士を接合する接合部を前記搬送方向に間隔をあけて複数形成する接合部形成工程と、
前記配置工程及び前記接合部形成工程の後で、前記シート状部材の連続体及び前記弾性部材の連続体を、前記切断対象位置で切断することにより、前記シート状部材及び前記弾性部材を生成する切断工程と、を有し、
前記弾性部材の連続体において前記搬送方向と直交する断面での形状は、長手方向と、前記長手方向と交差する方向に前記長手方向よりも長さの短い短手方向と、を有した形状であり、
前記弾性部材の連続体において前記一対の対向面のうちの一方の対向面に対して前記長手方向がなす角度が45°以上の部分を起立状部分とし、前記一方の対向面に対して前記長手方向がなす角度が45°未満の部分を横たわり状部分とした場合に、
前記配置工程では、前記搬送方向の単位長さにおいて前記起立状部分が占める前記搬送方向の長さよりも前記横たわり状部分が占める前記搬送方向の長さの方が長くなるように前記弾性部材の連続体の姿勢を変更しながら、前記一方の対向面に前記弾性部材の連続体を当接し、
前記接合部形成工程では、前記弾性部材の連続体を前記搬送方向に伸長した状態に維持するとともに、前記配置工程で変更後の姿勢に維持しつつ、前記接合部を、前記搬送方向と交差するCD方向において前記弾性部材の連続体の両側の位置にそれぞれ形成し、
前記切断工程の後では、前記搬送方向に収縮しつつ前記CD方向に拡大した前記弾性部材は、前記両側の前記接合部同士で前記CD方向に挟圧されて前記シート状部材に取り付けられていることを特徴とする吸収性物品に係るシート状部材の製造方法である。
The description of the present specification and the accompanying drawings will clarify at least the following matters.
After inserting the continuous body of the elastic members continuous in the transport direction between the pair of facing surfaces of the continuous body of the sheet-shaped members continuous in the transport direction, the continuous body of the sheet-like members is inserted. A method of manufacturing the sheet-like member to which the elastic member is attached by cutting at a cutting target position in the transport direction in the continuum of the sheet-like member.
By pulling the continuous body of the elastic member in the axial direction of the material coil from the non-rotating material coil in which the continuous body of the elastic member is wound around the axis, the continuous body of the elastic member is moved in the transport direction. The feeding process and the feeding process
An arrangement step of arranging a continuous body of the elastic members drawn out between the pair of facing surfaces in a state of being extended in the transport direction.
A joint portion forming step of forming a plurality of joint portions for joining the pair of facing surfaces at intervals in the transport direction.
After the arrangement step and the joint forming step, the sheet-shaped member and the elastic member are generated by cutting the continuous body of the sheet-shaped member and the continuous body of the elastic member at the cutting target position. With a cutting process,
The shape of the continuous body of the elastic member in the cross section orthogonal to the transport direction is a shape having a longitudinal direction and a lateral direction having a length shorter than the longitudinal direction in a direction intersecting the longitudinal direction. Yes,
In the continuum of the elastic members, a portion where the angle formed by the longitudinal direction with respect to one of the pair of facing surfaces is 45 ° or more is defined as an upright portion, and the longitudinal portion with respect to the one facing surface. When the part where the angle formed by the direction is less than 45 ° is regarded as the lying part,
In the arrangement step, the elastic member is continuous so that the length in the transport direction occupied by the lying portion is longer than the length in the transport direction occupied by the upright portion in the unit length in the transport direction. While changing the posture of the body, the continuous body of the elastic member is brought into contact with the one facing surface.
In the joint forming step, the continuous body of the elastic members is maintained in a state of being extended in the transport direction, and the joint is intersected with the transport direction while maintaining the posture changed in the arrangement step. Formed at positions on both sides of the continuum of the elastic members in the CD direction, respectively.
After the cutting step, the elastic member that contracts in the transport direction and expands in the CD direction is sandwiched between the joints on both sides in the CD direction and attached to the sheet-like member. This is a method for manufacturing a sheet-like member according to an absorbent article.

このような吸収性物品に係るシート状部材の製造方法によれば、弾性部材がシート状部材の接合部から滑ることを抑制可能である。詳しくは次の通りである。先ず、上記横たわり状部分の上記断面での形状の長手方向は、概ねCD方向を向いている。また、配置工程では、搬送方向の単位長さにおいて起立状部分が占める長さよりも横たわり状部分が占める長さの方が長くなるように弾性部材の連続体の姿勢を変更する。そして、切断工程の後では、接合部同士で弾性部材をCD方向から挟圧した状態になっているが、このときには、上述のように横たわり状部分が搬送方向に長く確保されている。よって、上記接合部同士が弾性部材を横たわり状部分で挟圧する確率が高くなっていて、これにより、同接合部同士が弾性部材を強く挟圧することができる。そして、その結果、接合部から弾性部材が滑ることを抑制可能となる。 According to the method for manufacturing a sheet-shaped member related to such an absorbent article, it is possible to prevent the elastic member from slipping from the joint portion of the sheet-shaped member. The details are as follows. First, the longitudinal direction of the shape of the lying portion in the cross section is generally oriented in the CD direction. Further, in the arrangement step, the posture of the continuous body of the elastic member is changed so that the length occupied by the lying portion is longer than the length occupied by the standing portion in the unit length in the transport direction. Then, after the cutting step, the elastic members are sandwiched between the joints from the CD direction, but at this time, the lying portion is secured long in the transport direction as described above. Therefore, there is a high probability that the joints will hold the elastic member between the lying portions, so that the joints can strongly hold the elastic member. As a result, it is possible to prevent the elastic member from slipping from the joint.

かかる吸収性物品に係るシート状部材の製造方法であって、
前記シート状部材の連続体は、前記搬送方向に連続する第1連続シートと、前記搬送方向に連続する第2連続シートと、を有し、
前記一対の対向面として、前記第1連続シートの一方の面と前記第2連続シートの一方の面とが対向しており、
前記配置工程では、前記搬送方向に沿って回転するロールの外周面に前記第1連続シートが巻き付けられて搬送されているとともに、前記第1連続シートが巻き付いている範囲において前記弾性部材の連続体が前記第1連続シートの前記一方の面に当接することにより、前記弾性部材の連続体も前記ロールの前記外周面に巻き付けられて搬送されており、
前記配置工程では、前記搬送方向に沿って回転するロールの外周面に前記第1連続シートが巻き付けられて搬送されているとともに、前記第1連続シートを介して前記弾性部材の連続体が前記ロールの外周面に巻き付けられて搬送されることにより、前記弾性部材の連続体の前記姿勢が変更されるのが望ましい。
A method for manufacturing a sheet-like member according to such an absorbent article.
The continuous body of the sheet-shaped members includes a first continuous sheet continuous in the transport direction and a second continuous sheet continuous in the transport direction.
As the pair of facing surfaces, one surface of the first continuous sheet and one surface of the second continuous sheet face each other.
In the arrangement step, the first continuous sheet is wound around the outer peripheral surface of the roll that rotates along the transport direction and is conveyed, and the continuous body of the elastic member is in the range in which the first continuous sheet is wound. Is in contact with the one surface of the first continuous sheet, so that the continuous body of the elastic member is also wound around the outer peripheral surface of the roll and conveyed.
In the arrangement step, the first continuous sheet is wound around the outer peripheral surface of the roll that rotates along the transport direction and is conveyed, and the continuous body of the elastic member is conveyed through the first continuous sheet. It is desirable that the posture of the continuum of the elastic members is changed by being wound around the outer peripheral surface of the elastic member and conveyed.

このような吸収性物品に係るシート状部材の製造方法によれば、弾性部材の連続体を上記ロールに巻き付けることで同連続体の姿勢を、横たわり状部分が搬送方向に長くなるように確実に変更可能となる。 According to the method for manufacturing a sheet-shaped member related to such an absorbent article, the continuous body of the elastic member is wound around the roll to ensure that the posture of the continuous body is long so that the lying-shaped portion becomes longer in the transport direction. It can be changed.

かかる吸収性物品に係るシート状部材の製造方法であって、
前記配置工程では、前記弾性部材の連続体は、前記CD方向に間隔をあけて複数本並んで配置され、
前記横たわり状部分は、前記搬送方向の長さが所定長さ以上の長尺横たわり状部分と、前記搬送方向の長さが前記所定長さ未満の短尺横たわり状部分と、を有し、
前記搬送方向に隣り合う前記長尺横たわり状部分同士の間に、前記搬送方向に沿った軸回りに前記弾性部材の連続体が複数回捻れてなる捻れ状部分が形成されるように、前記弾性部材の連続体の前記姿勢は変更されるとともに、前記捻れ状部分は、前記起立状部分と前記短尺横たわり状部分とが前記搬送方向に交互に複数並んだものであり、
前記複数本の弾性部材の連続体のうちの1つの弾性部材の連続体を第1弾性部材の連続体とし、他の1つの弾性部材の連続体を第2弾性部材の連続体とした場合に、
前記第1弾性部材の連続体が有する複数の前記捻れ状部分のうちの少なくとも1つの捻れ状部分と、前記第2弾性部材の連続体が有する複数の前記捻れ状部分のうちで前記第1弾性部材の連続体の前記捻れ状部分に最も近い捻れ状部分とが、前記搬送方向にオーバーラップしないように前記第1弾性部材の連続体の前記姿勢と前記第2弾性部材の連続体の前記姿勢とが変更されるのが望ましい。
A method for manufacturing a sheet-like member according to such an absorbent article.
In the arrangement step, a plurality of the continuous bodies of the elastic members are arranged side by side at intervals in the CD direction.
The horizontal portion has a long horizontal portion having a length in the transport direction of a predetermined length or more and a short horizontal portion having a length in the transport direction of less than the predetermined length.
The elasticity is formed between the long lying portions adjacent to each other in the conveying direction so that a twisted portion formed by twisting the continuum of the elastic members a plurality of times around the axis along the conveying direction is formed. The posture of the continuum of members is changed, and the twisted portion is formed by arranging a plurality of the standing portion and the short lying portion alternately in the transport direction.
When one of the continuums of the plurality of elastic members is the continuum of the first elastic member and the other continuum of the elastic members is the continuum of the second elastic member. ,
The first elasticity among the at least one twisted portion of the plurality of twisted portions of the continuum of the first elastic member and the plurality of twisted portions of the continuum of the second elastic member. The posture of the continuum of the first elastic member and the posture of the continuum of the second elastic member so that the twisted portion closest to the twisted portion of the continuum of the members does not overlap in the transport direction. And should be changed.

このような吸収性物品に係るシート状部材の製造方法によれば、切断工程の後に、搬送方向の同じ位置で、第1弾性部材と第2弾性部材とが、それぞれ対応する接合部から滑ってしまうという不具合を抑制することができる。詳しくは次の通りである。先ず、捻れ状部分は、起立状部分と短尺横たわり状部分とが複数並んで捻れたものであるので、上記断面での形状の長手方向の向きが搬送方向の位置に応じて変化している。そのため、当該捻れ状部分は、搬送方向の長い範囲で長手方向が略CD方向を向いたようなものではない。よって、かかる捻れ状部分は、切断工程の後の上記接合部同士によるCD方向の挟圧が不安定となる部分であり、つまり、第1弾性部材及び第2弾性部材のそれぞれにおいて上記接合部同士から搬送方向に滑り易い部分である。一方、上記製造方法によれば、第1弾性部材の連続体の少なくとも1つの捻れ状部分が、これに最も近い第2弾性部材の連続体の捻れ状部分に対して搬送方向にオーバーラップしないようにする。よって、第1弾性部材と第2弾性部材との間で、滑り易い位置を搬送方向に分散させることができる。そして、これにより、伸縮性の偏りが搬送方向の所定位置で大きく生じてしまうことを抑制可能となる。 According to the method for manufacturing a sheet-like member related to such an absorbent article, after the cutting step, the first elastic member and the second elastic member slip from the corresponding joints at the same position in the transport direction. It is possible to suppress the problem of closing. The details are as follows. First, since the twisted portion is a twisted portion in which a plurality of upright portions and short horizontal portions are arranged side by side, the longitudinal direction of the shape in the cross section changes depending on the position in the transport direction. Therefore, the twisted portion is not such that the longitudinal direction faces the CD direction in a long range in the transport direction. Therefore, the twisted portion is a portion where the pinching pressure in the CD direction between the joint portions after the cutting step becomes unstable, that is, the joint portions in each of the first elastic member and the second elastic member become unstable. It is a slippery part in the transport direction. On the other hand, according to the above manufacturing method, at least one twisted portion of the continuum of the first elastic member does not overlap with the twisted portion of the continuum of the second elastic member closest to the twisted portion in the transport direction. To. Therefore, slippery positions can be dispersed in the transport direction between the first elastic member and the second elastic member. As a result, it is possible to prevent a large deviation in elasticity from occurring at a predetermined position in the transport direction.

かかる吸収性物品に係るシート状部材の製造方法であって、
前記配置工程では、前記弾性部材の連続体は、前記CD方向に間隔をあけて複数本並んで配置され、
前記横たわり状部分は、前記搬送方向の長さが所定長さ以上の長尺横たわり状部分と、前記搬送方向の長さが前記所定長さ未満の短尺横たわり状部分と、を有し、
前記搬送方向に隣り合う前記長尺横たわり状部分同士の間に、前記搬送方向に沿った軸回りに前記弾性部材の連続体が複数回捻れてなる捻れ状部分が形成されるように、前記弾性部材の連続体の前記姿勢は変更されるとともに、前記捻れ状部分は、前記起立状部分と前記短尺横たわり状部分とが前記搬送方向に交互に複数並んだものであり、
前記複数の弾性部材の連続体のうちの1つの弾性部材の連続体を第1弾性部材の連続体とし、他の1つの弾性部材の連続体を第2弾性部材の連続体とした場合に、
前記第1弾性部材の連続体が有する複数の前記捻れ状部分のうちの少なくとも1つの捻れ状部分が、前記第2弾性部材の連続体が有する前記長尺横たわり状部分に前記搬送方向の位置に関して含まれるように、前記第1弾性部材の連続体の前記姿勢と前記第2弾性部材の連続体の前記姿勢とが変更されるのが望ましい。
A method for manufacturing a sheet-like member according to such an absorbent article.
In the arrangement step, a plurality of the continuous bodies of the elastic members are arranged side by side at intervals in the CD direction.
The horizontal portion has a long horizontal portion having a length in the transport direction of a predetermined length or more and a short horizontal portion having a length in the transport direction of less than the predetermined length.
The elasticity is formed between the long lying portions adjacent to each other in the conveying direction so that a twisted portion formed by twisting the continuum of the elastic members a plurality of times around the axis along the conveying direction is formed. The posture of the continuum of members is changed, and the twisted portion is formed by arranging a plurality of the standing portion and the short lying portion alternately in the transport direction.
When one of the continuums of the plurality of elastic members is the continuum of the first elastic member and the other continuum of the elastic members is the continuum of the second elastic member,
At least one twisted portion of the plurality of twisted portions of the continuum of the first elastic member is positioned in the transport direction with respect to the long lying portion of the continuum of the second elastic member. It is desirable that the posture of the continuum of the first elastic member and the posture of the continuum of the second elastic member be changed so as to be included.

このような吸収性物品に係るシート状部材の製造方法によれば、第1弾性部材の連続体の少なくとも1つの捻れ状部分が、第2弾性部材の連続体の横たわり状部分に搬送方向の位置に関して含まれるようにする。よって、第1弾性部材において上記接合部同士から滑り易い部分の搬送方向の位置に、第2弾性部材においては上記接合部同士から滑り難い部分を位置させることができる。そして、これにより、第1弾性部材と第2弾性部材との間で、滑り易い位置を搬送方向に分散させることができる。 According to the method for manufacturing a sheet-shaped member according to such an absorbent article, at least one twisted portion of the continuum of the first elastic member is positioned in the lateral portion of the continuum of the second elastic member in the transport direction. To be included with respect to. Therefore, in the first elastic member, the portion that is slippery from the joints can be positioned in the transport direction, and in the second elastic member, the portion that is not slippery from the joints can be positioned. As a result, slippery positions can be dispersed in the transport direction between the first elastic member and the second elastic member.

かかる吸収性物品に係るシート状部材の製造方法であって、
前記配置工程では、前記弾性部材の連続体は、前記CD方向に間隔をあけて複数本並んで配置され、
前記横たわり状部分は、前記搬送方向の長さが所定長さ以上の長尺横たわり状部分と、前記搬送方向の長さが前記所定長さ未満の短尺横たわり状部分と、を有し、
前記搬送方向に隣り合う前記長尺横たわり状部分同士の間に、前記搬送方向に沿った軸回りに前記弾性部材の連続体が複数回捻れてなる捻れ状部分が形成されるように、前記弾性部材の連続体の前記姿勢は変更されるとともに、前記捻れ状部分は、前記起立状部分と前記短尺横たわり状部分とが前記搬送方向に交互に複数並んだものであり、
前記接合部は、少なくとも前記切断対象位置を含む前記搬送方向の所定範囲において前記搬送方向に所定の形成ピッチで形成され、
前記捻れ状部分の前記搬送方向の長さが、前記接合部の前記形成ピッチより大きいのが望ましい。
A method for manufacturing a sheet-like member according to such an absorbent article.
In the arrangement step, a plurality of the continuous bodies of the elastic members are arranged side by side at intervals in the CD direction.
The horizontal portion has a long horizontal portion having a length in the transport direction of a predetermined length or more and a short horizontal portion having a length in the transport direction of less than the predetermined length.
The elasticity is formed between the long lying portions adjacent to each other in the conveying direction so that a twisted portion formed by twisting the continuum of the elastic members a plurality of times around the axis along the conveying direction is formed. The posture of the continuum of members is changed, and the twisted portion is formed by arranging a plurality of the standing portion and the short lying portion alternately in the transport direction.
The joint is formed at a predetermined formation pitch in the transport direction in a predetermined range in the transport direction including at least the position to be cut.
It is desirable that the length of the twisted portion in the transport direction is larger than the forming pitch of the joint portion.

このような吸収性物品に係るシート状部材の製造方法によれば、捻れ状部分の長さを接合部の形成ピッチよりも大きくしている。よって、かかる捻れ状部分は、少なくとも搬送方向の2カ所の位置の接合部に基づいて取り付けられる。そのため、捻れ状部分において接合部同士の挟圧が弱くなるという不具合を、接合部の数を増やすことで補うことができて、これにより、当該捻れ状部分でも比較的安定して弾性部材をシート状部材に取り付け可能となる。 According to the method for manufacturing a sheet-like member related to such an absorbent article, the length of the twisted portion is made larger than the formation pitch of the joint portion. Therefore, the twisted portion is attached based on the joints at at least two positions in the transport direction. Therefore, the problem that the pinching pressure between the joints becomes weak in the twisted portion can be compensated by increasing the number of joints, whereby the elastic member can be relatively stable even in the twisted portion. It can be attached to a shaped member.

かかる吸収性物品に係るシート状部材の製造方法であって、
前記配置工程では、前記弾性部材の連続体は、前記CD方向に間隔をあけて複数本並んで配置され、
前記横たわり状部分は、前記搬送方向の長さが所定長さ以上の長尺横たわり状部分と、前記搬送方向の長さが前記所定長さ未満の短尺横たわり状部分と、を有し、
前記搬送方向に隣り合う前記長尺横たわり状部分同士の間に、前記搬送方向に沿った軸回りに前記弾性部材の連続体が複数回捻れてなる捻れ状部分が形成されるように、前記弾性部材の連続体の前記姿勢は変更されるとともに、前記捻れ状部分は、前記起立状部分と前記短尺横たわり状部分とが前記搬送方向に交互に複数並んだものであり、
前記吸収性物品は、前記弾性部材が取り付けられて横方向の伸縮性が付与された前記シート状部材と第2シート状部材とを、前記横方向と交差する厚さ方向に重ね合わせた状態で溶着するサイドシール部を、前記横方向の各端部にそれぞれ有し、
前記搬送方向は、前記横方向に沿っており、
前記接合部が形成された前記シート状部材の連続体に、前記搬送方向に連続する前記第2シート状部材の連続体を前記厚さ方向に重ね合わせる重ね合わせ工程と、
前記厚さ方向に重ね合わせられた前記シート状部材の連続体と前記第2シート状部材の連続体とを溶着する前記サイドシール部を、前記搬送方向に所定ピッチで設定された前記切断対象位置の両側にそれぞれ形成するサイドシール部形成工程と、を有し、
前記厚さ方向から見た場合に、前記複数本の弾性部材の連続体のうちの少なくとも1つの弾性部材の連続体に係る前記捻れ状部分に対して前記接合部が設けられるとともに、前記捻れ状部分を前記CD方向に跨ぐように前記サイドシール部が設けられるのが望ましい。
A method for manufacturing a sheet-like member according to such an absorbent article.
In the arrangement step, a plurality of the continuous bodies of the elastic members are arranged side by side at intervals in the CD direction.
The horizontal portion has a long horizontal portion having a length in the transport direction of a predetermined length or more and a short horizontal portion having a length in the transport direction of less than the predetermined length.
The elasticity is formed between the long lying portions adjacent to each other in the conveying direction so that a twisted portion formed by twisting the continuum of the elastic members a plurality of times around the axis along the conveying direction is formed. The posture of the continuum of members is changed, and the twisted portion is formed by arranging a plurality of the standing portion and the short lying portion alternately in the transport direction.
The absorbent article is in a state in which the sheet-like member to which the elastic member is attached and the elasticity in the lateral direction is imparted and the second sheet-like member are overlapped in a thickness direction intersecting the lateral direction. A side seal portion to be welded is provided at each end portion in the lateral direction.
The transport direction is along the lateral direction,
A stacking step of superimposing the continuous body of the second sheet-like member continuous in the transport direction on the continuous body of the sheet-like member on which the joint portion is formed in the thickness direction.
The side seal portion for welding the continuous body of the sheet-shaped members and the continuous body of the second sheet-shaped members superposed in the thickness direction is set at a predetermined pitch in the transport direction. It has a side seal part forming step, which is formed on both sides of the above.
When viewed from the thickness direction, the joint portion is provided with respect to the twisted portion related to the continuum of at least one elastic member among the continuums of the plurality of elastic members, and the twisted shape is provided. It is desirable that the side seal portion is provided so as to straddle the portion in the CD direction.

このような吸収性物品に係るシート状部材の製造方法によれば、捻れ状部分に対して上記接合部が設けられるだけでなく、当該捻れ状部分をCD方向に跨ぐようにサイドシール部も設けられる。よって、接合部同士の挟圧が弱くなりがちな捻れ状部分については、当該挟圧に加えて、サイドシール部によっても捻れ状部分をCD方向に挟圧することができる。そして、これにより、かかる捻れ状部分でも比較的安定して弾性部材をシート状部材に取り付け可能となる。 According to the method for manufacturing a sheet-like member related to such an absorbent article, not only the joint portion is provided for the twisted portion, but also a side seal portion is provided so as to straddle the twisted portion in the CD direction. Be done. Therefore, for the twisted portion where the pinching pressure between the joint portions tends to be weak, the twisted portion can be pinched in the CD direction by the side seal portion in addition to the pinching pressure. As a result, the elastic member can be attached to the sheet-shaped member relatively stably even in such a twisted portion.

また、
搬送方向に連続するシート状部材の連続体の互いに対向する一対の対向面同士の間に、前記搬送方向に連続する弾性部材の連続体を介挿した後に、前記シート状部材の連続体を、当該シート状部材の連続体における前記搬送方向の切断対象位置で切断することにより、前記弾性部材が取り付けられた前記シート状部材を製造する装置であって、
前記弾性部材の連続体が軸回りに巻かれてなる非回転の資材コイルから、前記弾性部材の連続体が、前記資材コイルの軸方向に引っ張られることにより、前記弾性部材の連続体を前記搬送方向に繰り出す繰り出し装置と、
前記一対の対向面同士の間に、繰り出された前記弾性部材の連続体を前記搬送方向に伸長した状態で配置する配置装置と、
前記一対の対向面同士を接合する接合部を前記搬送方向に間隔をあけて複数形成する接合部形成装置と、
前記配置装置及び前記接合部形成装置よりも前記搬送方向の下流側の位置で、前記シート状部材の連続体及び前記弾性部材の連続体を、前記切断対象位置で切断することにより、前記シート状部材及び前記弾性部材を生成する切断装置と、を有し、
前記弾性部材の連続体において前記搬送方向と直交する断面での形状は、長手方向と、前記長手方向と交差する方向に前記長手方向よりも長さの短い短手方向と、を有し、
前記弾性部材の連続体において前記一対の対向面のうちの一方の対向面に対して前記長手方向がなす角度が45°以上の部分を起立状部分とし、前記一方の対向面に対して前記長手方向がなす角度が45°未満の部分を横たわり状部分とした場合に、
前記配置装置は、前記搬送方向の単位長さにおいて前記起立状部分が占める前記搬送方向の長さよりも前記横たわり状部分が占める前記搬送方向の長さの方が長くなるように前記弾性部材の連続体の姿勢を変更しながら、前記一方の対向面に前記弾性部材の連続体を載置し、
前記接合部形成装置は、前記弾性部材の連続体を前記搬送方向に伸長した状態に維持するとともに、前記配置工程で変更後の姿勢に維持しつつ、前記接合部を、前記搬送方向と交差するCD方向において前記弾性部材の連続体の両側の位置にそれぞれ形成し、
前記切断工程よりも前記搬送方向の下流側では、前記搬送方向に収縮しつつ前記CD方向に拡大した前記弾性部材は、前記両側の前記接合部同士で前記CD方向に挟圧されて前記シート状部材に取り付けられていることを特徴とする吸収性物品に係るシート状部材の製造装置である。
Also,
After inserting the continuous body of the elastic members continuous in the transport direction between the pair of facing surfaces of the continuous body of the sheet-shaped members continuous in the transport direction, the continuous body of the sheet-like members is inserted. An apparatus for manufacturing the sheet-like member to which the elastic member is attached by cutting at a cutting target position in the transport direction in the continuum of the sheet-like member.
The continuous body of the elastic member is conveyed by pulling the continuous body of the elastic member in the axial direction from the non-rotating material coil formed by winding the continuous body of the elastic member around the axis. A feeding device that feeds in the direction and
An arrangement device for arranging a continuous body of the elastic members drawn out between the pair of facing surfaces in a state of being extended in the transport direction.
A joint portion forming device for forming a plurality of joint portions for joining the pair of facing surfaces at intervals in the transport direction.
By cutting the continuum of the sheet-like member and the continuum of the elastic member at the position downstream of the arrangement device and the joint forming device in the transport direction, the sheet-like member is formed. It has a member and a cutting device that produces the elastic member.
The shape of the continuous body of the elastic member in a cross section orthogonal to the transport direction has a longitudinal direction and a lateral direction having a length shorter than the longitudinal direction in a direction intersecting the longitudinal direction.
In the continuum of the elastic members, a portion where the angle formed by the longitudinal direction with respect to one of the pair of facing surfaces is 45 ° or more is defined as an upright portion, and the longitudinal portion with respect to the one facing surface. When the part where the angle formed by the direction is less than 45 ° is regarded as the lying part,
The arrangement device is a continuum of the elastic members so that the length in the transport direction occupied by the lying portion is longer than the length in the transport direction occupied by the upright portion in the unit length in the transport direction. While changing the posture of the body, the continuous body of the elastic member is placed on the one facing surface.
The joint forming device intersects the joint with the transport direction while maintaining the continuous body of the elastic members in a state of being extended in the transport direction and maintaining the posture changed in the arrangement step. Formed at positions on both sides of the continuum of the elastic members in the CD direction, respectively.
On the downstream side in the transport direction from the cutting step, the elastic member that contracts in the transport direction and expands in the CD direction is sandwiched between the joints on both sides in the CD direction to form the sheet. It is an apparatus for manufacturing a sheet-shaped member related to an absorbent article, which is attached to the member.

このような吸収性物品に係るシート状部材の製造装置によれば、前述した製造方法の場合と同様の作用効果を奏することができる。 According to the manufacturing apparatus for the sheet-shaped member related to such an absorbent article, it is possible to obtain the same effects as in the case of the manufacturing method described above.

===本実施形態===
本実施形態の吸収性物品に係るシート状部材の製造方法及び製造装置は、例えば、吸収性物品の一例としての使い捨ておむつ1の製造ラインで使用される。図2は、同おむつ1の一例としての3ピースタイプのおむつ1の概略斜視図である。
=== This embodiment ===
The method and apparatus for manufacturing the sheet-shaped member according to the absorbent article of the present embodiment are used, for example, in the manufacturing line of the disposable diaper 1 as an example of the absorbent article. FIG. 2 is a schematic perspective view of a three-piece type diaper 1 as an example of the diaper 1.

このおむつ1は、図2のような着用前のパンツ型状態において、「縦方向」と、縦方向と直交する「横方向」と、縦方向及び横方向と直交する「前後方向」と、を有している。そして、同おむつ1の着用中に、縦方向は、上下方向を向いていることが多い。そのため、以下では、縦方向のことを「上下方向」とも言う。
なお、上下方向については、上側が、着用者の胴回り側に対応し、下側が、着用者の股下側に対応している。また、前後方向については、前側が着用者の腹側に対応し、後側が着用者の背側に対応している。更に、横方向については、一方側が着用者の左側に対応し、他方側が着用者の右側に対応している。
This diaper 1 has a "vertical direction", a "horizontal direction" orthogonal to the vertical direction, and a "front-back direction" orthogonal to the vertical direction and the horizontal direction in the pants-shaped state before wearing as shown in FIG. Have. Then, while wearing the diaper 1, the vertical direction is often oriented in the vertical direction. Therefore, in the following, the vertical direction is also referred to as "vertical direction".
In the vertical direction, the upper side corresponds to the waistline side of the wearer, and the lower side corresponds to the inseam side of the wearer. In the front-back direction, the front side corresponds to the ventral side of the wearer, and the rear side corresponds to the back side of the wearer. Further, in the lateral direction, one side corresponds to the left side of the wearer and the other side corresponds to the right side of the wearer.

図2のパンツ型状態においては、おむつ1は、横方向に沿った腹側帯部材31と、この腹側帯部材31の後側に位置しつつ、当該腹側帯部材31と共同して、縦方向の上側に胴回り開口BHを形成するための横方向に沿った背側帯部材41と、腹側帯部材31と背側帯部材41との間に設けられた股下部としての吸収性本体10と、を備えている。そして、吸収性本体10は、腹側帯部材31及び背側帯部材41よりも縦方向の下方に突出して位置している。
また、腹側帯部材31における横方向の各端部31e,31eと、対応する背側帯部材41における横方向の各端部41e,41eとは、サイドシール部SSで接合されている。そして、これにより、腹側帯部材31及び背側帯部材41が、吸収性本体10と共同して、下側且つ横方向の両側にそれぞれ脚回り開口LH,LHを一つずつ形成している。
In the pants-type state of FIG. 2, the diaper 1 is located on the ventral band member 31 along the lateral direction and on the rear side of the ventral band member 31, and in cooperation with the ventral band member 31 in the vertical direction. A dorsal band member 41 along the lateral direction for forming a waist circumference opening BH on the upper side, and an absorbent main body 10 as a crotch part provided between the ventral band member 31 and the dorsal band member 41 are provided. There is. The absorbent main body 10 is located so as to project downward in the vertical direction from the ventral band member 31 and the dorsal band member 41.
Further, the lateral end portions 31e and 31e of the ventral band member 31 and the lateral end portions 41e and 41e of the corresponding dorsal band member 41 are joined by the side seal portion SS. As a result, the ventral band member 31 and the dorsal band member 41 form leg circumference openings LH and LH on both the lower side and the lateral side in cooperation with the absorbent body 10.

図3は、展開状態のおむつ1を着用者の肌側から見た概略平面図である。また、図4は、図3中のIVa−IVa断面図であるとともに、同図3中のIVb−IVb断面図でもある。 FIG. 3 is a schematic plan view of the unfolded diaper 1 as viewed from the wearer's skin side. Further, FIG. 4 is a sectional view taken along line IVa-IVa in FIG. 3 as well as a sectional view taken along line IVb-IVb in FIG.

ここで、展開状態とは、図2のパンツ型状態のおむつ1が横方向の両側に有する前述のサイドシール部SSの接合を解くことで、腹側帯部材31と背側帯部材41とを分離するとともに、おむつ1を縦方向に開くことで、おむつ1を平面上に展開した状態のことである。
また、この展開状態においては、おむつ1を構成する各部材の伸縮性が皆無であるという仮想的状態で同おむつ1を示している。例えば、この例では、おむつ1には、同おむつ1に伸縮性を付与する目的で複数の弾性部材17,18,35,45が設けられているが、この展開状態では、かかる弾性部材17,18,35,45の伸縮性(収縮力)が全く無いという仮想的状態で同おむつ1を示している。
Here, the unfolded state means that the ventral band member 31 and the dorsal band member 41 are separated by breaking the joint of the above-mentioned side seal portions SS that the diaper 1 in the pants-shaped state of FIG. 2 has on both sides in the lateral direction. At the same time, by opening the diaper 1 in the vertical direction, the diaper 1 is unfolded on a plane.
Further, in this unfolded state, the diaper 1 is shown in a virtual state in which each member constituting the diaper 1 has no elasticity. For example, in this example, the diaper 1 is provided with a plurality of elastic members 17, 18, 35, 45 for the purpose of imparting elasticity to the diaper 1, but in this unfolded state, the elastic members 17, The diaper 1 is shown in a virtual state where there is no elasticity (contraction force) of 18, 35, 45.

展開状態においては、おむつ1は、互いに直交する三方向として長手方向と横方向と厚さ方向(図3では紙面を貫通する方向)とを有している。なお、長手方向は、前述の縦方向に沿っている。そして、長手方向の一方側が腹側に対応し、他方側が背側に対応している。また、長手方向の外側が、縦方向の上側に対応し、長手方向の内側が、縦方向の下側に対応している。そして、このように長手方向と縦方向とは互いに似通った方向であることから、以下では、説明の都合上、この展開状態においても、長手方向に代えて縦方向を用いて説明することもある。一方、横方向は、前述のパンツ型状態における横方向と同義である。また、厚さ方向については、一方側が、着用者の身体に接する肌側に対応し、他方側が、その逆側の非肌側に対応している。なお、厚さ方向は、前述の前後方向に沿っている。 In the unfolded state, the diaper 1 has a longitudinal direction, a lateral direction, and a thickness direction (direction penetrating the paper surface in FIG. 3) as three directions orthogonal to each other. The longitudinal direction is along the above-mentioned vertical direction. Then, one side in the longitudinal direction corresponds to the ventral side, and the other side corresponds to the dorsal side. Further, the outer side in the longitudinal direction corresponds to the upper side in the vertical direction, and the inner side in the longitudinal direction corresponds to the lower side in the vertical direction. Since the longitudinal direction and the longitudinal direction are similar to each other in this way, for convenience of explanation, the longitudinal direction may be used instead of the longitudinal direction even in this unfolded state. .. On the other hand, the lateral direction is synonymous with the lateral direction in the above-mentioned pants type state. Further, in the thickness direction, one side corresponds to the skin side in contact with the wearer's body, and the other side corresponds to the non-skin side on the opposite side. The thickness direction is along the above-mentioned front-rear direction.

図3の展開状態においては、腹側帯部材31は、横方向に沿って配されており、また、背側帯部材41は、腹側帯部材31と長手方向に所定の間隔をあけた位置で、横方向に沿って配されている。そして、これら腹側帯部材31と背側帯部材41との間に吸収性本体10が長手方向に沿って掛け渡されつつ、同吸収性本体10の長手方向の各端部10ea,10ebが、それぞれ最寄りの各帯部材31,41に接合固定されていて、これにより、その外観形状は、平面視略H型状をなしている。また、この状態から、吸収性本体10における長手方向の所定位置CL1(長手方向におけるおむつ1の中央位置CL1)を折り位置としておむつ1が二つ折りされるとともに、この二つ折りの状態において互いに対向する帯部材31,41の横方向の端部31e,41e同士が前述のサイドシール部SSで接合されると、これら帯部材31,41同士が環状に繋がって、これにより、図2に示すような胴回り開口BH及び一対の脚回り開口LH,LHが形成されたパンツ型のおむつ1となる。 In the deployed state of FIG. 3, the ventral band member 31 is arranged along the lateral direction, and the dorsal band member 41 is laterally spaced from the ventral band member 31 at a predetermined distance in the longitudinal direction. Arranged along the direction. Then, while the absorbent main body 10 is hung between the ventral band member 31 and the dorsal band member 41 along the longitudinal direction, the end portions 10ea and 10eb of the absorbent main body 10 in the longitudinal direction are closest to each other. It is joined and fixed to each of the band members 31 and 41 of the above, whereby the external shape thereof has a substantially H-shape in a plan view. Further, from this state, the diaper 1 is folded in half with the predetermined position CL1 in the longitudinal direction (the center position CL1 of the diaper 1 in the longitudinal direction) in the absorbent body 10 as the folding position, and the diapers 1 face each other in this folded state. When the lateral ends 31e and 41e of the band members 31 and 41 are joined by the side seal portion SS described above, the band members 31 and 41 are connected in an annular shape, thereby as shown in FIG. This is a pants-type diaper 1 in which a waist opening BH and a pair of leg openings LH and LH are formed.

吸収性本体10は、図3の展開状態において平面視略長方形状をなしている。そして、吸収性本体10の長手方向が、おむつ1の長手方向に沿うように配されている。また、図4に示すように、吸収性本体10は、吸収体11と、同吸収体11を肌側から覆って吸収性本体10の肌側面をなす液透過性のトップシート13と、同吸収体11を非肌側から覆って吸収性本体10の非肌側面をなす液不透過性のバックシート15と、を備えている。 The absorbent main body 10 has a substantially rectangular shape in a plan view in the expanded state of FIG. The longitudinal direction of the absorbent body 10 is arranged along the longitudinal direction of the diaper 1. Further, as shown in FIG. 4, the absorbent body 10 is absorbed by the absorbent body 11 and the liquid-permeable top sheet 13 that covers the absorbent body 11 from the skin side to form the skin side surface of the absorbent main body 10. It is provided with a liquid-impermeable back sheet 15 that covers the body 11 from the non-skin side and forms a non-skin side surface of the absorbent main body 10.

吸収体11は、液体吸収性の吸収性コア11cと、同コア11cの外周面を被覆する不図示のコアラップシートと、を有する。吸収性コア11cは、パルプ繊維や高吸収性ポリマー等の液体吸収性素材を所定形状の一例としての平面視略砂時計形状に成形した成形体である。また、コアラップシートには、ティッシュペーパーや不織布等の液透過性シートを使用可能であるが、コアラップシートについては無くても良い。更に、吸収性コア11cの形状は、何等上記の平面視略砂時計形状に限らず、他の形状でも良い。 The absorber 11 has a liquid-absorbing absorbent core 11c and a core wrap sheet (not shown) that covers the outer peripheral surface of the core 11c. The absorbent core 11c is a molded body obtained by molding a liquid absorbent material such as pulp fiber or a highly absorbent polymer into a substantially hourglass shape in a plan view as an example of a predetermined shape. Further, as the core wrap sheet, a liquid permeable sheet such as tissue paper or non-woven fabric can be used, but the core wrap sheet may not be used. Further, the shape of the absorbent core 11c is not limited to the above-mentioned substantially hourglass shape in a plan view, and may be any other shape.

トップシート13は、不織布等の液透過性の柔軟なシートである。また、バックシート15は、液不透過性の柔軟なシートである。そして、同バックシート15の一例としては、ポリエチレンフィルムやポリプロピレンフィルム等の液不透過性の防漏シートと、防漏シートの非肌側に貼り合わされた不織布製の外装シートとを有した二層構造のラミネートシート15が挙げられる。 The top sheet 13 is a liquid-permeable flexible sheet such as a non-woven fabric. Further, the back sheet 15 is a liquid-impermeable and flexible sheet. As an example of the back sheet 15, a two-layer having a liquid-impermeable leak-proof sheet such as a polyethylene film or a polypropylene film and a non-woven fabric exterior sheet bonded to the non-skin side of the leak-proof sheet. A laminated sheet 15 having a structure can be mentioned.

なお、図3に示すように、少なくともバックシート15は、吸収体11から長手方向及び横方向に突出するような平面サイズのシートである。そして、横方向に突出した部分に、それぞれ長手方向に伸縮するレッグギャザーLGが形成されている。すなわち、当該突出した部分には、弾性部材として長手方向に沿った糸ゴム17が長手方向に伸長した状態で固定されていて、これにより、当該部分に伸縮性のレッグギャザーLGが形成されている。 As shown in FIG. 3, at least the back sheet 15 is a flat-sized sheet that protrudes from the absorber 11 in the longitudinal direction and the lateral direction. Then, leg gather LGs that expand and contract in the longitudinal direction are formed in the portions that protrude in the lateral direction. That is, a thread rubber 17 along the longitudinal direction is fixed to the protruding portion as an elastic member in a state of being extended in the longitudinal direction, whereby an elastic leg gather LG is formed in the portion. ..

また、図3及び図4に示すように、吸収性本体10は、横漏れを防止する目的で横方向の各端部に防漏壁部としての立体ギャザーLSG,LSGを有している。すなわち、立体ギャザーLSGとなるシート状部分に弾性部材18として長手方向に沿った糸ゴム18が長手方向に伸長した状態で取り付けられた構成が、吸収性本体10の横方向の各端部に設けられている。 Further, as shown in FIGS. 3 and 4, the absorbent main body 10 has three-dimensional gathers LSG and LSG as leak-proof wall portions at each end in the lateral direction for the purpose of preventing lateral leakage. That is, a configuration in which the elastic member 18 is attached to the sheet-like portion to be the three-dimensional gather LSG in a state in which the thread rubber 18 along the longitudinal direction is extended in the longitudinal direction is provided at each end portion in the lateral direction of the absorbent body 10. Has been done.

図3に示すように、腹側帯部材31は、2枚の不織布32,33を素材とした平面視略矩形形状のシート状部材である。すなわち、図4に示すように、同2枚の不織布32,33同士は、互いに厚さ方向に重ねられた状態にあるとともに、互いに対向する一対の対向面同士が、後述の図5に示すように縦方向(長手方向)及び横方向に離散的に配された複数の溶着部j,j…(接合部に相当)で接合されている。そして、図3に示すように、当該腹側帯部材31は、吸収性本体10よりも横方向の両側に突出するように配されつつ、同吸収性本体10における腹側の端部10eaに非肌側から重ねられて接合されている。 As shown in FIG. 3, the ventral band member 31 is a sheet-like member having a substantially rectangular shape in a plan view made of two non-woven fabrics 32 and 33. That is, as shown in FIG. 4, the two non-woven fabrics 32 and 33 are in a state of being overlapped with each other in the thickness direction, and the pair of facing surfaces facing each other are as shown in FIG. 5 described later. It is joined by a plurality of welded portions j, j ... (corresponding to the joint portion) discretely arranged in the vertical direction (longitudinal direction) and the horizontal direction. Then, as shown in FIG. 3, the ventral band member 31 is arranged so as to protrude on both sides in the lateral direction from the absorbent main body 10, and is non-skinned on the ventral end 10ea of the absorbent main body 10. They are stacked and joined from the side.

また、背側帯部材41も、腹側帯部材31と同様に、2枚の不織布42,43を素材とした平面視略矩形形状のシート状部材である。すなわち、図4に示すように、同2枚の不織布42,43同士は、互いに厚さ方向に重ねられた状態にあるとともに、互いに対向する一対の対向面同士が、図5の腹側帯部材31の場合と同様に、縦方向(長手方向)及び横方向に離散的に配された複数の溶着部j,j…(接合部に相当)で接合されている。そして、図3に示すように、当該背側帯部材41は、吸収性本体10よりも横方向の両側に突出するように配されつつ、同吸収性本体10における背側の端部10ebに非肌側から重ねられて接合されている。 Further, the dorsal band member 41 is also a sheet-like member having a substantially rectangular shape in a plan view, which is made of two non-woven fabrics 42 and 43 as a material, like the ventral band member 31. That is, as shown in FIG. 4, the two non-woven fabrics 42 and 43 are in a state of being overlapped with each other in the thickness direction, and the pair of facing surfaces facing each other are the ventral band members 31 of FIG. Similar to the case of the above case, a plurality of welded portions j, j ... (corresponding to the joint portion) discretely arranged in the vertical direction (longitudinal direction) and the horizontal direction are joined. Then, as shown in FIG. 3, the dorsal band member 41 is arranged so as to protrude on both sides in the lateral direction from the absorbent main body 10, and is non-skinned on the dorsal end 10 eb of the absorbent main body 10. They are stacked and joined from the side.

なお、以下の説明で腹側帯部材31及び背側帯部材41の両者に共通する内容については、両者を代表して腹側帯部材31についてのみ説明し、背側帯部材41については、対応する部材等の符号を括弧書きで示すのみとする。 In the following description, the contents common to both the ventral band member 31 and the dorsal band member 41 will be described only for the ventral band member 31 on behalf of both, and for the dorsal band member 41, the corresponding members and the like will be described. Only the code is shown in parentheses.

また、この例では、腹側帯部材31(41)に係る2枚の不織布32,33(42,43)の何れも、スパンボンド不織布が使用されている。但し、何等これに限らず、SMS(スパンボンド/メルトブローン/スパンボンド)不織布等の別の種類の不織布を用いても良い。また、この例では、不織布の構成繊維として熱可塑性樹脂の代表例のポリプロピレン(PP)の単独繊維を用いているが、何等これに限らない。例えば、ポリエチレン(PE)などの他の熱可塑性樹脂の単独繊維を用いても良いし、更には、PE及びPP等の鞘芯構造を有した複合繊維を用いても良い。 Further, in this example, the spunbonded non-woven fabric is used for each of the two non-woven fabrics 32, 33 (42, 43) related to the ventral band member 31 (41). However, the present invention is not limited to this, and another type of non-woven fabric such as SMS (spanbond / meltblown / spunbond) non-woven fabric may be used. Further, in this example, a polypropylene (PP) single fiber, which is a typical example of a thermoplastic resin, is used as a constituent fiber of the non-woven fabric, but the present invention is not limited to this. For example, a single fiber of another thermoplastic resin such as polyethylene (PE) may be used, or a composite fiber having a sheath core structure such as PE and PP may be used.

図5は、展開状態の腹側帯部材31を非肌側から見た概略平面図である。
同図5に示すように、腹側帯部材31(41)の横方向の各端部31e,31e(41e,41e)には、それぞれ、前述のサイドシール部SSが設けられている。この例では、サイドシール部SSは、互いに同形状の複数の溶着部SSk,SSk…を縦方向に沿った一直線上に並んで有している。そして、各溶着部SSkは、それぞれ、腹側帯部材31の不織布33と背側帯部材41の不織布43とを溶着するものであるとともに、腹側帯部材31に係る2枚の不織布32,33において互いに対向する一対の対向面同士を溶着するものでもあり、また背側帯部材41に係る2枚の不織布42,43において互いに対向する一対の対向面同士を溶着するものでもある。
FIG. 5 is a schematic plan view of the ventral band member 31 in the unfolded state as viewed from the non-skin side.
As shown in FIG. 5, each of the lateral end portions 31e, 31e (41e, 41e) of the ventral band member 31 (41) is provided with the above-mentioned side seal portion SS. In this example, the side seal portions SS have a plurality of welded portions SSK, SSK ... Having the same shape as each other in a straight line along the vertical direction. Each of the welded portions SSk welds the non-woven fabric 33 of the ventral band member 31 and the non-woven fabric 43 of the dorsal band member 41, and faces each other in the two non-woven fabrics 32 and 33 related to the ventral band member 31. It also welds the pair of facing surfaces to each other, and also welds the pair of facing surfaces facing each other in the two non-woven fabrics 42 and 43 related to the dorsal band member 41.

また、同図5に示すように、腹側帯部材31(41)に係る2枚の不織布32,33(42,43)において互いに対向する一対の対向面同士の間には、横方向に沿った弾性部材として複数本の糸ゴム35,35…(45,45…)が縦方向に並んで介挿されつつ、同不織布32,33(42,43)に前述の溶着部j,j…に基づいて取り付けられている。そして、これにより、腹側帯部材31(41)には横方向の伸縮性が付与されている。すなわち、前述の溶着部j,j…は、2枚の不織布32,33(42,43)の一対の対向面同士を接合する機能だけでなく、同2枚の不織布32,33(42,43)に糸ゴム35(45)を取り付ける機能も有している。 Further, as shown in FIG. 5, in the two non-woven fabrics 32, 33 (42, 43) relating to the ventral band member 31 (41), between the pair of facing surfaces facing each other, along the lateral direction. A plurality of rubber threads 35, 35 ... (45, 45 ...) As elastic members are inserted side by side in the vertical direction, and are based on the above-mentioned welded portions j, j ... In the non-woven fabric 32, 33 (42, 43). Is attached. As a result, the ventral band member 31 (41) is provided with elasticity in the lateral direction. That is, the above-mentioned welded portions j, j ... Not only have the function of joining the pair of facing surfaces of the two non-woven fabrics 32, 33 (42, 43), but also the two non-woven fabrics 32, 33 (42, 43). ) Also has a function of attaching the thread rubber 35 (45).

図6A及び図6Bは、かかる溶着部jが奏する後者の機能、すなわち糸ゴム35(45)の取り付け機能の説明図であり、図5中のVI部の概略拡大図である。
図5に示すように、溶着部j,j…は、横方向に沿って配された糸ゴム35(45)毎にそれぞれ設けられている。また、溶着部jは、対応する糸ゴム35の縦方向の両側に対となるように形成されていて、すなわち、縦方向の両側に並ぶ一対の溶着部j,j同士が、溶着部対jPをなしている。そして、かかる溶着部対jPは、横方向に隣り合う溶着部対jPとの間に間隔をあけつつ横方向に並んで複数対形成されている。一方、図6Aに示すように、かかる溶着部対jPをなす一対の溶着部j,j同士は、縦方向に間隔Djをあけて並んでいるが、ここで、かかる間隔Djの大きさは、伸長倍率の目標値まで横方向に伸長した状態での糸ゴム35(45)の縦方向の大きさD35t(D45t)と同寸又はそれよりも若干大きい寸法に設定されている。また、図2のパンツ型状態のおむつ1においては、糸ゴム35(45)は、上記の伸長倍率の伸長状態から緩和されている。よって、同パンツ型状態においては、図6Bに示すように、糸ゴム35(45)は横方向に収縮しつつ縦方向に拡大しようとしているが、ここで、上記の寸法の大小関係に基づいて、糸ゴム35(45)の縦方向の拡大が一対の溶着部j,j同士に規制される。そして、これにより、当該溶着部j,j同士で、糸ゴム35(45)は実質的に縦方向に挟圧された状態となっていて、その結果、当該糸ゴム35(45)が腹側帯部材31(41)に取り付けられた状態となっている。
6A and 6B are explanatory views of the latter function played by the welding portion j, that is, the attachment function of the rubber thread 35 (45), and are schematic enlarged views of the VI portion in FIG.
As shown in FIG. 5, the welded portions j, j ... Are provided for each of the thread rubbers 35 (45) arranged along the lateral direction. Further, the welded portions j are formed so as to be paired on both sides of the corresponding thread rubber 35 in the vertical direction, that is, the pair of welded portions j, j arranged on both sides in the vertical direction are welded portions to jP. Is doing. Then, a plurality of pairs of such welded portions to jP are formed side by side in the lateral direction with a gap between the welded portions to jP adjacent to each other in the lateral direction. On the other hand, as shown in FIG. 6A, the pair of welded portions j, j forming the welded portion vs. jP are arranged with an interval Dj in the vertical direction. Here, the magnitude of the interval Dj is determined. The size is set to be the same as or slightly larger than the vertical size D35t (D45t) of the rubber thread 35 (45) in a state of being stretched in the horizontal direction to the target value of the stretch ratio. Further, in the pants-shaped diaper 1 of FIG. 2, the thread rubber 35 (45) is relaxed from the stretched state of the stretch ratio described above. Therefore, in the same pants type state, as shown in FIG. 6B, the rubber thread 35 (45) tries to expand in the vertical direction while contracting in the horizontal direction, but here, based on the magnitude relationship of the above dimensions. , The vertical expansion of the rubber thread 35 (45) is restricted to the pair of welded portions j, j. As a result, the thread rubber 35 (45) is substantially sandwiched between the welded portions j and j in the vertical direction, and as a result, the thread rubber 35 (45) is placed in the ventral band. It is in a state of being attached to the member 31 (41).

ちなみに、上記の伸長倍率とは、糸ゴム35(45)の全長L1を、自然長たる無負荷状態の全長L0の何倍まで伸ばしているかを示す値R(=L1/L0)のことである。そして、前述の伸長倍率の目標値は、例えば1.5倍〜4.0倍から選択される。また、糸ゴム35(45)の繊度としては、例えば、400dtex〜1000dtexを例示できる。 By the way, the above-mentioned elongation ratio is a value R (= L1 / L0) indicating how many times the total length L1 of the thread rubber 35 (45) is extended to the total length L0 in the naturally long no-load state. .. Then, the target value of the elongation ratio described above is selected from, for example, 1.5 times to 4.0 times. Further, as the fineness of the rubber thread 35 (45), for example, 400 dtex to 1000 dtex can be exemplified.

このようなおむつ1は、製造ラインで製造される。図7は、同ラインでおむつ1が製造される様子を一部斜視で示す概略平面図である。また、図8A、図8B、及び図8Cは、それぞれ、図7中のA部の概略拡大図、B部の概略拡大図、及びC部の概略拡大図である。ちなみに、ここでより正しく言えば、図8Cでは、腹側帯部材31に係る連続シート32a,33aではなく、背側帯部材41に係る連続シート42a,43aが見えているはずであるが、説明の便宜上、ここでは、腹側帯部材31に係る連続シート32a,33aが見えているものとして説明する。このことは、後述の図15及び図16でも同様である。 Such a diaper 1 is manufactured on a production line. FIG. 7 is a schematic plan view showing a state in which the diaper 1 is manufactured on the same line with a partial perspective. 8A, 8B, and 8C are a schematic enlarged view of a portion A, a schematic enlarged view of a portion B, and a schematic enlarged view of a portion C in FIG. 7, respectively. By the way, to be more correct here, in FIG. 8C, the continuous sheets 42a, 43a related to the dorsal band member 41 should be visible instead of the continuous sheets 32a, 33a related to the ventral band member 31, but for convenience of explanation. Here, it is assumed that the continuous sheets 32a and 33a related to the ventral band member 31 are visible. This also applies to FIGS. 15 and 16 described later.

同ラインでは、例えば、腹側帯部材31に係る2枚の不織布32,33(シート状部材に相当)が、それぞれ搬送方向に連続した連続シート32a,33a(シート状部材の連続体に相当)の形態で搬送されており、同じく、背側帯部材41に係る2枚の不織布42,43(シート状部材に相当)も、それぞれ搬送方向に連続した連続シート42a,43a(シート状部材の連続体に相当)の形態で搬送されている。そして、各2枚の連続シート32a,33a,42a,43aが、それぞれ、搬送方向に設定された複数の加工位置PK1〜PK5を通過する度に、各加工位置PK1,PK2…に対応した加工処理が、各2枚の連続シート32a,33a,42a,43aに対して行われる。 In the same line, for example, the two non-woven fabrics 32 and 33 (corresponding to the sheet-shaped member) related to the ventral band member 31 are continuous sheets 32a and 33a (corresponding to the continuous body of the sheet-shaped member) which are continuous in the transport direction, respectively. Similarly, the two non-woven fabrics 42 and 43 (corresponding to the sheet-shaped members) related to the back side band member 41 are also conveyed in the form, and the continuous sheets 42a and 43a (in the continuous body of the sheet-shaped members) continuous in the conveying direction, respectively. It is transported in the form of (equivalent). Then, each time each of the two continuous sheets 32a, 33a, 42a, 43a passes through the plurality of processing positions PK1 to PK5 set in the transport direction, the processing processing corresponding to each processing position PK1, PK2 ... Is performed on each of the two continuous sheets 32a, 33a, 42a, 43a.

なお、ここで、連続シート32a,33a,42a,43aの厚さ方向及び搬送方向の両者と直交する方向のことを「CD方向」と定義した場合に、この例では、各2枚の連続シート32a,33a,42a,43a、すなわち腹側帯部材31に係る2枚の連続シート32a,33aと背側帯部材41に係る2枚の連続シート42a,43aとの両者は、互いにCD方向に並んで搬送されている。但し、何等これに限らない。 Here, when the direction orthogonal to both the thickness direction and the transport direction of the continuous sheets 32a, 33a, 42a, 43a is defined as the "CD direction", in this example, two continuous sheets each. 32a, 33a, 42a, 43a, that is, both the two continuous sheets 32a, 33a related to the ventral band member 31 and the two continuous sheets 42a, 43a related to the dorsal band member 41 are conveyed side by side in the CD direction. Has been done. However, it is not limited to this.

また、この例では、上記複数の加工位置として、第1加工位置PK1乃至第5加工位置PK5が、搬送方向の上流から下流へとこの順番で並んで設定されている。そして、各加工位置PK1,PK2…での加工処理は、腹側帯部材31に係る2枚の連続シート32a,33aに対するものと、背側帯部材41に係る2枚の連続シート42a,43aに対するものとで、互いに概ね同じである。
そのため、以下では、共通の内容については、腹側帯部材31と背側帯部材41とで区別せずに説明する。例えば、単に「帯部材31(41)」と言ったり、単に「2枚の連続シート32a,33a(42a,43a)」と言って説明する。なお、その場合には、「連続シート32a,33a(42a,43a)」や「糸ゴム35(45)」、「糸ゴムの連続体35a(45a)」等のように、各部材を示す用語の直後の符号が、腹側帯部材31に係る部材の符号であり、その後に続く括弧書きの符号が、背側帯部材41に係る部材の符号である。
Further, in this example, as the plurality of machining positions, the first machining position PK1 to the fifth machining position PK5 are set in this order from upstream to downstream in the transport direction. Then, the processing at each processing position PK1, PK2 ... Is for the two continuous sheets 32a, 33a related to the ventral band member 31 and for the two continuous sheets 42a, 43a related to the dorsal band member 41. And they are almost the same as each other.
Therefore, in the following, the common contents will be described without distinguishing between the ventral band member 31 and the dorsal band member 41. For example, it may be simply referred to as "band member 31 (41)" or simply referred to as "two continuous sheets 32a, 33a (42a, 43a)". In that case, terms indicating each member such as "continuous sheet 32a, 33a (42a, 43a)", "thread rubber 35 (45)", "thread rubber continuous body 35a (45a)", etc. The code immediately after is the code of the member related to the ventral band member 31, and the code in parentheses following the code is the code of the member related to the dorsal band member 41.

図7に示すように、各帯部材31(41)に係る2枚の連続シート32a,33a(42a,43a)の搬送は、所謂横流れ形態でなされている。すなわち、おむつ1の横方向に相当する方向が、搬送方向を向いた姿勢で2枚の連続シート32a,33a(42a,43a)は搬送されている。そのため、2枚の連続シート32a,33a(42a,43a)には、横方向に隣り合うおむつ1,1同士の間の境界位置PBLが搬送方向に製品ピッチP1で仮想的に設定されている。そして、この製造ラインの終端に位置する第5加工位置PK5において、当該境界位置PBLを切断対象位置PCとして2枚の連続シート32a,33a(42a,43a)を切断することにより、単票状のおむつ1が生成される。 As shown in FIG. 7, the transport of the two continuous sheets 32a, 33a (42a, 43a) pertaining to each band member 31 (41) is performed in a so-called cross flow mode. That is, the two continuous sheets 32a, 33a (42a, 43a) are conveyed in a posture in which the direction corresponding to the lateral direction of the diaper 1 faces the conveying direction. Therefore, on the two continuous sheets 32a, 33a (42a, 43a), the boundary position PBL between the diapers 1, 1 adjacent to each other in the lateral direction is virtually set at the product pitch P1 in the transport direction. Then, at the fifth processing position PK5 located at the end of the production line, the two continuous sheets 32a, 33a (42a, 43a) are cut with the boundary position PBL as the cutting target position PC to form a single sheet. Diaper 1 is generated.

なお、各帯部材31(41)に係る2枚の連続シート32a,33a(42a,43a)の搬送は、ベルトコンベアや搬送ローラー等の適宜な搬送装置(不図示)でなされる。よって、特段の説明が無い限りは、これらの搬送装置により、2枚の連続シート32a,33a(42a,43a)は搬送方向に搬送されているものとする。ベルトコンベアの一例としては、駆動周回する無端ベルトを搬送面として有した通常のベルトコンベアや、無端ベルトの外周面に吸着機能を有したサクションベルトコンベア等を挙げることができる。 The two continuous sheets 32a, 33a (42a, 43a) related to each band member 31 (41) are conveyed by an appropriate transfer device (not shown) such as a belt conveyor or a transfer roller. Therefore, unless otherwise specified, it is assumed that the two continuous sheets 32a, 33a (42a, 43a) are conveyed in the conveying direction by these conveying devices. Examples of the belt conveyor include a normal belt conveyor having a drive-circling endless belt as a transport surface, a suction belt conveyor having a suction function on the outer peripheral surface of the endless belt, and the like.

また、この例では、糸ゴム35,45の伸縮性に比べて各連続シート32a,33a,42a,43aの伸縮性は非常に小さく無視できるレベルにある。そして、各連続シート32a,33a、42a,43aは、第1加工位置PK1から第5加工位置PK5までに亘って、搬送方向に張った状態で搬送される。 Further, in this example, the elasticity of each continuous sheet 32a, 33a, 42a, 43a is very small and negligible as compared with the elasticity of the rubber threads 35 and 45. Then, the continuous sheets 32a, 33a, 42a, 43a are conveyed in a stretched state in the conveying direction from the first processing position PK1 to the fifth processing position PK5.

以下、おむつ1の製造過程について詳説する。
図7に示すように、先ず、各帯部材31(41)に係る2枚の連続シート32a,33a(42a,43a)は、第1加工位置PK1を通過する。そして、その通過の際には、同図7及び図8Aに示すように、2枚の連続シート32a,33a(42a,43a)同士が厚さ方向に重ね合わせられる。また、重ね合わせられる際には、これら2枚の連続シート32a,33a(42a,43a)において互いに対向する一対の対向面32ast,33ast(42ast,43ast)同士の間に、搬送方向に連続する弾性部材の連続体として糸ゴムの連続体35a,35a…(45a,45a…)が、搬送方向に前述の目標の伸長倍率で伸長した状態で、CD方向に複数並んで介挿される(配置工程に相当)。
The manufacturing process of diaper 1 will be described in detail below.
As shown in FIG. 7, first, the two continuous sheets 32a, 33a (42a, 43a) related to each band member 31 (41) pass through the first processing position PK1. Then, when passing through the sheets, as shown in FIGS. 7 and 8A, the two continuous sheets 32a, 33a (42a, 43a) are superposed on each other in the thickness direction. Further, when they are overlapped, the elasticity of the two continuous sheets 32a, 33a (42a, 43a) that are continuous in the transport direction between the pair of facing surfaces 32ast, 33ast (42ast, 43ast) that face each other. A plurality of rubber thread continuums 35a, 35a ... (45a, 45a ...) As a continuum of members are inserted side by side in the CD direction in a state of being stretched in the transport direction at the above-mentioned target elongation ratio (in the arrangement step). Equivalent).

なお、かかる糸ゴムの連続体35a(45a)の一対の対向面32ast,33ast(42ast,43ast)への配置は、後述の図9Aの下流側ニップロール機構54Dでなされ、つまり、同下流側ニップロール機構54Dが、請求項の「配置装置」に相当する。 The thread rubber continuum 35a (45a) is arranged on the pair of facing surfaces 32ast, 33ast (42ast, 43ast) by the downstream nip roll mechanism 54D of FIG. 9A, which will be described later, that is, the downstream nip roll mechanism. 54D corresponds to the "arrangement device" of the claim.

また、この重ね合わせられることと同時又はその直後に、図8Bに示すように、2枚の連続シート32a,33a(42a,43a)同士には、接合部として前述の溶着部j,j…が形成されて、これにより、当該溶着部j,j…で、2枚の連続シート32a,33a(42a,43a)の一対の対向面32ast,33ast(42ast,43ast)同士が接合される(接合部形成工程に相当)。 Further, at the same time as or immediately after the superposition, as shown in FIG. 8B, the two continuous sheets 32a, 33a (42a, 43a) have the above-mentioned welded portions j, j ... As joint portions. The welded portions j, j ... are formed to join the pair of facing surfaces 32ast, 33ast (42ast, 43ast) of the two continuous sheets 32a, 33a (42a, 43a) to each other (joining portion). Corresponds to the forming process).

ここで、前述のように、この製造ラインでは、おむつ1の横方向が搬送方向に沿っており、また、おむつ1の縦方向がCD方向に沿っている。そのため、かかる溶着部jは、糸ゴムの連続体35a(45a)のCD方向の両側に対となるように形成される。すなわち、図8Bに示すように、同連続体35a(45a)のCD方向の両側に並ぶ一対の溶着部j,j同士が、溶着部対jPをなしている。そして、かかる溶着部対jPは、搬送方向に隣り合う溶着部対jPとの間に間隔をあけつつ搬送方向に並んで複数対形成される。 Here, as described above, in this production line, the horizontal direction of the diaper 1 is along the transport direction, and the vertical direction of the diaper 1 is along the CD direction. Therefore, the welded portions j are formed so as to be paired on both sides of the thread rubber continuum 35a (45a) in the CD direction. That is, as shown in FIG. 8B, a pair of welded portions j, j arranged on both sides of the continuum 35a (45a) in the CD direction form a welded portion vs. jP. Then, a plurality of pairs of such welded portions vs. jPs are formed side by side in the transporting direction with a gap between the welding portions vs. jPs adjacent to each other in the transporting direction.

また、かかる溶着部対jPをなす一対の溶着部j,j同士は、図6Aに示すように、CD方向に間隔Djをあけて並んでいるが、ここで、この間隔Djの大きさは、伸長倍率の目標値まで搬送方向に伸長した状態たる第1加工位置PK1での状態の糸ゴムの連続体35a(45a)のCD方向の大きさD35t(D45t)と同寸又はそれよりも若干大きい寸法とされている。
よって、後述の第5加工位置PK5において糸ゴムの連続体35a(45a)が切断されて糸ゴム35(45)の伸長状態が緩和された際には、図6Bに示すように、搬送方向に収縮しつつCD方向に拡大しようとする糸ゴム35(45)を、一対の溶着部j,j同士がCD方向から挟圧して、これにより、当該糸ゴム35(45)が帯部材31(41)の2枚の不織布32,33(42,43)に取り付けられた状態となる。
Further, as shown in FIG. 6A, the pair of welded portions j, j forming the welded portion vs. jP are arranged with an interval Dj in the CD direction. Here, the magnitude of the interval Dj is determined. The size of the rubber thread continuum 35a (45a) in the state of being stretched in the transport direction to the target value of the stretch ratio in the transport direction at the first processing position PK1 is the same size as or slightly larger than the size D35t (D45t) in the CD direction. It is a dimension.
Therefore, when the continuous body 35a (45a) of the thread rubber is cut at the fifth processing position PK5 described later and the stretched state of the thread rubber 35 (45) is relaxed, as shown in FIG. 6B, in the transport direction. A pair of welded portions j and j hold the thread rubber 35 (45) that is shrinking and expanding in the CD direction from the CD direction, whereby the thread rubber 35 (45) becomes a band member 31 (41). ), It is in a state of being attached to the two non-woven fabrics 32, 33 (42, 43).

かかる溶着部jの形成は、例えばヒートシール装置や超音波溶着装置60(接合部形成装置に相当)を用いて行うことができて、この例では、超音波溶着装置60が使用されている。なお、ヒートシール装置(不図示)は、例えば搬送方向に沿って回転しつつ加熱された一対のロールを有する。一方のロールは、各溶着部jに対応した凸部を外周面に有したヒートエンボスロールであり、他方のロールは、上記凸部を平滑な外周面で受けるアンビルロールである。また、超音波溶着装置60の詳細については後述する。 The formation of the welding portion j can be performed using, for example, a heat sealing device or an ultrasonic welding device 60 (corresponding to a joint forming device), and in this example, the ultrasonic welding device 60 is used. The heat sealing device (not shown) has, for example, a pair of rolls heated while rotating along the transport direction. One roll is a heat embossed roll having a convex portion corresponding to each welded portion j on the outer peripheral surface, and the other roll is an anvil roll that receives the convex portion on the smooth outer peripheral surface. The details of the ultrasonic welding device 60 will be described later.

次に、図7に示すように、腹側帯部材31に係る2枚の連続シート32a,33a及び背側帯部材41に係る2枚の連続シート42a,43aの両者は、第2加工位置PK2を通過する。そして、その通過の際には、腹側帯部材31に係る2枚の連続シート32a,33aと背側帯部材41に係る2枚の連続シート42a,43aとの間に、不図示の別工程で生成された単票状の吸収性本体10が掛け渡されて固定され、これにより、略H形状に展開されたおむつ1h,1h…が連続してなる略梯子状のおむつの連続体1hsが形成される。 Next, as shown in FIG. 7, both the two continuous sheets 32a and 33a related to the ventral band member 31 and the two continuous sheets 42a and 43a related to the dorsal band member 41 pass through the second processing position PK2. To do. Then, at the time of passing therethrough, it is generated between the two continuous sheets 32a and 33a related to the ventral band member 31 and the two continuous sheets 42a and 43a related to the dorsal band member 41 in a separate step (not shown). The cut-sheet-shaped absorbent main body 10 is hung and fixed, whereby a continuous body 1hs of a substantially ladder-shaped diaper in which diapers 1h, 1h ... Expanded in a substantially H shape are continuous is formed. To.

かかる吸収性本体10の固定は、例えば不図示の回転ドラム装置を用いて行うことができる。回転ドラム装置は、例えば搬送方向に沿って回転する回転ドラムを有し、同回転ドラムは、外周面に吸収性本体10を離脱可能に保持する複数の保持部を有している。 The fixing of the absorbent main body 10 can be performed by using, for example, a rotating drum device (not shown). The rotary drum device has, for example, a rotary drum that rotates along a transport direction, and the rotary drum has a plurality of holding portions on the outer peripheral surface that removably hold the absorbent main body 10.

次に、かかる略梯子状のおむつの連続体1hsは、第3加工位置PK3を通過する。そして、その通過の際には、吸収性本体10におけるCD方向の所定位置CL1で同本体10を2つ折りして、これにより、腹側帯部材31に係る2枚の連続シート32a,33aと背側帯部材41に係る2枚の連続シート42a,43aとを厚さ方向に重ねた状態にする。 Next, the continuum 1hs of the substantially ladder-shaped diaper passes through the third processing position PK3. Then, at the time of passing through the absorbent main body 10, the main body 10 is folded in half at a predetermined position CL1 in the CD direction in the absorbent main body 10, whereby the two continuous sheets 32a and 33a and the dorsal band related to the ventral band member 31 are folded. The two continuous sheets 42a and 43a related to the member 41 are overlapped in the thickness direction.

かかる2つ折りは、例えば不図示の折り曲げガイド装置を用いて行うことができる。折り曲げガイド装置は、例えば搬送方向の所定位置に配置されたガイド板やガイドローラーを有する。そして、これらガイド板やガイドローラーは、その配置位置を通過する略梯子状のおむつの連続体1hsが2つ折り形状になるように同連続体1hsを案内する。 Such folding in half can be performed using, for example, a bending guide device (not shown). The bending guide device has, for example, a guide plate or a guide roller arranged at a predetermined position in the transport direction. Then, these guide plates and guide rollers guide the continuum 1hs of the substantially ladder-shaped diaper passing through the arrangement position so as to form a folded shape in half.

次に、当該2つ折り状態のおむつの連続体1hsbは、第4加工位置PK4を通過する。そして、その通過の際には、厚さ方向に重ねられた腹側帯部材31に係る2枚の連続シート32a,33aと背側帯部材41に係る2枚の連続シート42a,43aとを、搬送方向における切断対象位置PCの両側の各位置でそれぞれ溶着して一対のサイドシール部SS,SSを形成し、これにより、同おむつの連続体1hsbを二つ折り状態に固定する。そして、その結果、複数のパンツ型のおむつ1,1…が横方向に繋がってなるパンツ型のおむつの連続体1sが生成される。 Next, the diaper continuum 1hsb in the folded state passes through the fourth processing position PK4. Then, at the time of passing through the two continuous sheets 32a, 33a related to the ventral band member 31 and the two continuous sheets 42a, 43a related to the dorsal band member 41, which are stacked in the thickness direction, are conveyed in the transport direction. A pair of side seal portions SS and SS are formed by welding at each position on both sides of the cutting target position PC in the above diaper, thereby fixing the continuous body 1hsb of the same diaper in a folded state. Then, as a result, a continuous body 1s of pants-type diapers in which a plurality of pants-type diapers 1, 1 ... Are connected in the lateral direction is generated.

ここで、図8Cに示すように、サイドシール部SSは、複数の溶着部SSk,SSk…をCD方向(縦方向)に並んで有している。そして、各溶着部SSkは、それぞれ、腹側帯部材31の連続シート33aと背側帯部材41の連続シート43aとを溶着するものであるとともに、腹側帯部材31の連続シート32a,33aの一対の対向面32ast,33ast同士を溶着するものでもあり、また背側帯部材41の連続シート42a,43aの一対の対向面42ast,43ast同士を溶着するものでもある(図7)。 Here, as shown in FIG. 8C, the side seal portion SS has a plurality of welded portions SSK, SSK ... Arranged in the CD direction (vertical direction). Each of the welded portions SSK welds the continuous sheet 33a of the ventral band member 31 and the continuous sheet 43a of the dorsal band member 41, and the continuous sheets 32a and 33a of the ventral band member 31 face each other. The surfaces 32ast and 33ast are welded to each other, and the pair of facing surfaces 42ast and 43ast of the continuous sheets 42a and 43a of the dorsal band member 41 are welded to each other (FIG. 7).

また、この図8Cの例では、各溶着部SSkの平面形状は、搬送方向たる縦方向よりもCD方向たる横方向に長い横長の矩形形状となっている。但し、何等これに限らない。例えば、平行四辺形状や長円形状でも良いし、これら以外の形状でも良い。また、この例では、各溶着部SSkの長手方向が、搬送方向たる横方向に沿っているが、何等これに限らない。すなわち、各溶着部SSkの長手方向が、CD方向たる縦方向に沿っていても良いし、或いは、横方向及び縦方向の両者と交差する方向を向いていても良い。 Further, in the example of FIG. 8C, the planar shape of each welded portion SSK is a horizontally long rectangular shape that is longer in the horizontal direction in the CD direction than in the vertical direction in the transport direction. However, it is not limited to this. For example, it may be a parallel quadrilateral shape, an oval shape, or a shape other than these. Further, in this example, the longitudinal direction of each welded portion SSK is along the lateral direction which is the transport direction, but the present invention is not limited to this. That is, the longitudinal direction of each welded portion SSK may be along the vertical direction, which is the CD direction, or may be oriented so as to intersect both the horizontal direction and the vertical direction.

かかるサイドシール部SSの形成は、例えば不図示のヒートシール装置を用いて行うことができる。ヒートシール装置は、例えば搬送方向に沿って回転しつつ加熱された一対のロールを有する。一方のロールは、サイドシール部SSの各溶着部SSkに対応した凸部を外周面に有したヒートエンボスロールであり、他方のロールは、上記凸部を平滑な外周面で受けるアンビルロールである。なお、場合によっては、後述する図9Aの超音波溶着装置60と略同構成の溶着装置で上記のサイドシール部SSを形成しても良い。 The formation of the side seal portion SS can be performed by using, for example, a heat seal device (not shown). The heat seal device has, for example, a pair of rolls that are heated while rotating along the transport direction. One roll is a heat embossed roll having a convex portion corresponding to each welding portion SSK of the side seal portion SS on the outer peripheral surface, and the other roll is an anvil roll that receives the convex portion on the smooth outer peripheral surface. .. In some cases, the side seal portion SS may be formed by a welding device having substantially the same configuration as the ultrasonic welding device 60 of FIG. 9A described later.

次に、図7に示すように、かかるパンツ型のおむつの連続体1sは、第5加工位置PK5を通過する。そして、その通過の際には、一対のサイドシール部SS,SS同士の間に位置する上記切断対象位置PCで同連続体1sを切断し(切断工程に相当)、これにより、おむつ1が製造される。 Next, as shown in FIG. 7, the pants-type diaper continuum 1s passes through the fifth processing position PK5. Then, at the time of passing through, the continuum 1s is cut by the cutting target position PC located between the pair of side seal portions SS and SS (corresponding to the cutting step), whereby the diaper 1 is manufactured. Will be done.

なお、この切断の際には、腹側帯部材31及び背側帯部材41に係る各2枚の連続シート32a,33a(42a,43a)及び各糸ゴムの連続体35a,35a…(45a,45a…)が上記切断対象位置PCで切断される。そして、これにより起こる糸ゴム35(45)の伸長状態の緩和を通して溶着部対jPの一対の溶着部j,j同士の挟圧で糸ゴム35(45)が各帯部材31,41に取り付けられるが、これについては、第1加工位置PK1の説明で述べた通りである。 At the time of this cutting, the two continuous sheets 32a, 33a (42a, 43a) related to the ventral band member 31 and the dorsal band member 41 and the continuous bodies 35a, 35a ... (45a, 45a ... ) Is cut at the cutting target position PC. Then, through the relaxation of the stretched state of the thread rubber 35 (45) caused by this, the thread rubber 35 (45) is attached to the band members 31, 41 by the pinching pressure between the pair of welded portions j, j of the welded portion vs. jP. However, this is as described in the explanation of the first processing position PK1.

かかる切断は、例えば不図示のカッター装置を用いて行うことができる。カッター装置は、例えば搬送方向に沿って回転する一対のロールを有する。そして、一方のロールは、外周面にカッター刃を有するカッターロールであり、他方のロールは、上記カッター刃を外周面で受けるアンビルロールである。 Such cutting can be performed using, for example, a cutter device (not shown). The cutter device has, for example, a pair of rolls that rotate along the transport direction. One roll is a cutter roll having a cutter blade on the outer peripheral surface, and the other roll is an anvil roll that receives the cutter blade on the outer peripheral surface.

以上、第1加工位置PK1乃至第5加工位置PK5でなされる各加工処理について説明したが、本実施形態では、第1加工位置PK1でなされる加工処理について幾つかの工夫をしている。また、第2加工位置PK2乃至第5加工位置PK5でなされる各加工処理については概ね周知のものである。そのため、以下では、第1加工位置PK1でなされる加工処理についてのみ詳説し、第2加工位置PK2乃至第5加工位置PK5の各加工処理については詳説しない。
また、前述したように第1加工位置PK1での加工処理は、腹側帯部材31に係る部材32a,33a,35aに対するものと、背側帯部材41に係る部材42a,43a,45aに対するものとで互いに概ね同じである。そのため、以下では、これら両者を代表して、腹側帯部材31に係る部材32a,33a,35aに対する加工処理についてのみ説明し、背側帯部材41については、その説明を省略する。また、以下では、腹側帯部材31の連続シート32a,33aのうちの一方の連続シート32a及び他方の連続シート33aのことを、それぞれ「第1連続シート32a」及び「第2連続シート33a」とも言う。
The processing performed at the first processing position PK1 to the fifth processing position PK5 has been described above, but in the present embodiment, some measures are taken for the processing processing performed at the first processing position PK1. Further, each processing process performed at the second processing position PK2 to the fifth processing position PK5 is generally well known. Therefore, in the following, only the processing performed at the first processing position PK1 will be described in detail, and each processing processing at the second processing position PK2 to the fifth processing position PK5 will not be described in detail.
Further, as described above, the processing at the first processing position PK1 is performed on the members 32a, 33a, 35a related to the ventral band member 31 and the members 42a, 43a, 45a related to the dorsal band member 41. It is almost the same. Therefore, in the following, on behalf of both of these, only the processing of the members 32a, 33a, 35a related to the ventral band member 31 will be described, and the description of the dorsal band member 41 will be omitted. Further, in the following, one continuous sheet 32a and the other continuous sheet 33a of the continuous sheets 32a and 33a of the ventral band member 31 will be referred to as "first continuous sheet 32a" and "second continuous sheet 33a", respectively. To tell.

図9Aは、第1加工位置PK1でなされる加工処理の説明図である。すなわち、同加工処理のメインの装置をなす超音波溶着装置60をCD方向から見た概略側面図である。また、図9Bは、図9A中のB−B矢視の概略拡大図である。 FIG. 9A is an explanatory diagram of the machining process performed at the first machining position PK1. That is, it is a schematic side view of the ultrasonic welding device 60 which is the main device of the processing process as viewed from the CD direction. Further, FIG. 9B is a schematic enlarged view of the arrow BB in FIG. 9A.

図9Aに示すように、第1加工位置PK1には、第1連続シート32aを搬送方向に沿って搬送する搬送機構51と、第2連続シート33aを搬送方向に沿って搬送する搬送機構52と、糸ゴムの連続体35aを搬送方向に沿って搬送する搬送機構53と、が、それぞれ、超音波溶着装置60よりも搬送方向の上流側の各位置に配されている。 As shown in FIG. 9A, at the first processing position PK1, a transport mechanism 51 for transporting the first continuous sheet 32a along the transport direction and a transport mechanism 52 for transporting the second continuous sheet 33a along the transport direction. , A transport mechanism 53 for transporting the continuous body 35a of the rubber thread along the transport direction is arranged at each position on the upstream side of the ultrasonic welding device 60 in the transport direction.

第1連続シート32aの搬送機構51及び第2連続シート33aの搬送機構52は、どちらもCD方向に沿った回転軸回りに回転する搬送ローラー51R,52Rと、対応する各搬送ローラー51R,52Rを駆動回転する駆動源としての不図示のサーボモータと、を有する。そして、これにより、搬送ローラー51Rは、搬送方向に沿って駆動回転して第1連続シート32aを超音波溶着装置60へと送り、また、搬送ローラー52Rも、搬送方向に沿って駆動回転して第2連続シート33aを超音波溶着装置60へと送る。 The transport mechanism 51 of the first continuous sheet 32a and the transport mechanism 52 of the second continuous sheet 33a both include transport rollers 51R and 52R that rotate around a rotation axis along the CD direction and corresponding transport rollers 51R and 52R. It has a servomotor (not shown) as a drive source for driving and rotating. As a result, the transport roller 51R is driven and rotated along the transport direction to feed the first continuous sheet 32a to the ultrasonic welding device 60, and the transport roller 52R is also driven and rotated along the transport direction. The second continuous sheet 33a is sent to the ultrasonic welding device 60.

一方、糸ゴムの連続体35aの搬送機構53は、糸ゴムの連続体35aを資材コイル35aCから繰り出す繰り出し装置53UWと、繰り出された糸ゴムの連続体35aの張力値(N)を所定の目標値に調整するテンションコントローラー53TCと、当該張力値を調整後の糸ゴムの連続体35aを伸長倍率の目標値まで伸長する伸長装置54と、を有する。 On the other hand, the transport mechanism 53 of the thread rubber continuum 35a sets a predetermined target of the tension value (N) of the thread rubber continuum 35a and the feeding device 53UW that feeds the thread rubber continuum 35a from the material coil 35aC. It has a tension controller 53TC that adjusts the tension value, and an extension device 54 that extends the tension value-adjusted rubber thread continuum 35a to a target value of the extension ratio.

なお、述のように第1連続シート32aと第2連続シート33aとの間には、CD方向に並んで複数の糸ゴムの連続体35a,35a…が介挿される。また、各糸ゴムの連続体35aは、互いの伸長倍率の目標値が異なっている。そのため、上記の搬送機構53は、糸ゴムの連続体35a,35a…毎にそれぞれ設けられている。但し、伸長倍率の目標値が同じ糸ゴムの連続体35a,35a同士であれば、搬送機構53のうちの伸長装置54については共用しても良い。また、搬送機構53の構成は、何れも概ね同じである。そのため、以下では、代表して1つの搬送機構53の構成53UW,53TC,54について説明する。 As described above, a plurality of thread rubber continuums 35a, 35a ... Are inserted between the first continuous sheet 32a and the second continuous sheet 33a so as to be arranged in the CD direction. Further, the continuous bodies 35a of the rubber threads have different target values of the elongation ratios of each other. Therefore, the above-mentioned transport mechanism 53 is provided for each of the thread rubber continuums 35a, 35a .... However, if the target values of the extension ratios are the same thread rubber continuums 35a and 35a, the extension device 54 of the transfer mechanism 53 may be shared. Further, the configurations of the transport mechanism 53 are substantially the same. Therefore, in the following, the configurations 53UW, 53TC, 54 of one transport mechanism 53 will be described as a representative.

図10の概略斜視図に示すように、繰り出し装置53UWは、オーバーエンド解舒方式の繰り出し装置である。また、資材コイル35aCは、糸ゴムの連続体35aを、軸としての円筒状の紙管35aCsに巻いたものである。そして、同紙管35aCsが、繰り出し装置53UWの非回転の支持軸53sに回転不能且つ互いに同軸に取り付けられるとともに、資材コイル35aCの軸方向に糸ゴムの連続体35aが引っ張られることにより、非回転の資材コイル35aCから糸ゴムの連続体35aが、定位置に配されたリング状案内部材53Rの貫通孔53Rhを通るような搬送ルートで繰り出される。そして、その結果、同連続体35aがテンションコントローラー53TCへと搬送される。 As shown in the schematic perspective view of FIG. 10, the feeding device 53UW is an over-end unwinding type feeding device. Further, the material coil 35aC is a continuous body of rubber thread 35a wound around a cylindrical paper tube 35aCs as a shaft. Then, the paper tube 35aCs is non-rotatably attached to the non-rotating support shaft 53s of the feeding device 53UW and is coaxially attached to each other, and the continuous body 35a of the rubber thread is pulled in the axial direction of the material coil 35aC to cause non-rotation. The continuous body 35a of the rubber thread is delivered from the material coil 35aC by a transport route that passes through the through hole 53Rh of the ring-shaped guide member 53R arranged at a fixed position. Then, as a result, the continuum 35a is conveyed to the tension controller 53TC.

なお、かかる糸ゴムの連続体35aが繰り出される際には、上記のように資材コイル35aCは軸回りに回転しない。そのため、繰り出し中の先行の資材コイル35aCの糸ゴムの連続体35aの尾端部35aeeに、予め後行の資材コイル35aCの糸ゴムの連続体35aの先端部35aesを接続しておけば、先行の資材コイル35aCの糸ゴムの連続体35aが途切れる際に、繰り出しを止めることなく円滑に、先行の資材コイル35aCから後行の資材コイル35aCへと繰り出しの変更を行うことができる。 When the continuous body 35a of the rubber thread is unwound, the material coil 35aC does not rotate about the axis as described above. Therefore, if the tip portion 35aes of the thread rubber continuum 35a of the trailing material coil 35aC is connected in advance to the tail end portion 35aee of the thread rubber continuum 35a of the preceding material coil 35aC during feeding, the preceding portion 35aes can be connected. When the continuous body 35a of the thread rubber of the material coil 35aC of No. 1 is interrupted, the feeding can be smoothly changed from the preceding material coil 35aC to the succeeding material coil 35aC without stopping the feeding.

また、かかる繰り出し装置53UWから糸ゴムの連続体35aを繰り出す際には、繰り出し位置PTO(糸ゴムの連続体35aが資材コイル35aCの外周面から離れる位置)が資材コイル35aCの外周面上を周方向に沿って一方向に移動する。そのため、糸ゴムの連続体35aは、その繰り出しに伴って、繰り出し位置PTOが外周面を一回りする度に一回転だけ捻られることになる。なお、このことは、後で関係する。 Further, when the continuous body 35a of the thread rubber is fed out from the feeding device 53UW, the feeding position PTO (the position where the continuous body 35a of the thread rubber is separated from the outer peripheral surface of the material coil 35aC) goes around the outer peripheral surface of the material coil 35aC. Move in one direction along the direction. Therefore, the continuous body 35a of the rubber thread is twisted by one rotation each time the feeding position PTO goes around the outer peripheral surface with the feeding. This will be relevant later.

図9Aに示すように、テンションコントローラー53TCは、搬送方向の上流から搬送される糸ゴムの連続体35aが巻き付けられるローラー53TCRと、ローラー53TCRの下流側に配置されたテンションセンサー53TCSと、コンピュータやシーケンサー等の制御部(不図示)と、を有する。ローラー53TCRは、駆動源としての不図示のサーボモータで駆動回転する。また、テンションセンサー53TCSは、搬送方向の計測対象位置での糸ゴムの連続体35aの張力値(N)を計測する。そして、制御部は、計測された張力値が目標値となるように、上記のサーボモータを制御する。例えば、張力値が目標値より大きい場合には、ローラー53TCRの回転数(rpm)が増加するようにサーボモータを制御する一方、逆の場合には、ローラー53TCRの回転数が減少するように同モータを制御する。そして、これにより、張力値が目標値となるように調整される。 As shown in FIG. 9A, the tension controller 53TC includes a roller 53TCR around which the thread rubber continuum 35a transported from the upstream in the transport direction is wound, a tension sensor 53TCS arranged on the downstream side of the roller 53TCR, and a computer or sequencer. Etc. (not shown). The roller 53TCR is driven and rotated by a servomotor (not shown) as a drive source. Further, the tension sensor 53TCS measures the tension value (N) of the continuous body 35a of the rubber thread at the measurement target position in the transport direction. Then, the control unit controls the servomotor so that the measured tension value becomes the target value. For example, when the tension value is larger than the target value, the servomotor is controlled so that the rotation speed (rpm) of the roller 53TCR increases, and in the opposite case, the rotation speed of the roller 53TCR decreases. Control the motor. Then, as a result, the tension value is adjusted to be the target value.

伸長装置54は、搬送方向の所定位置に配された上流側ニップロール機構54Uと、同上流側ニップロール機構54Uの下流側に配された下流側ニップロール機構54Dと、を有する。どちらのニップロール機構54U,54Dも、駆動回転する上下一対のニップロール54Ru,54Rdを有し、一対のニップロール54Ru,54Rd同士は、糸ゴムの連続体35aを若干挟圧しながら、駆動源としての不図示のサーボモータで駆動回転する。また、上流側ニップロール機構54Uの一対のニップロール54Ru,54Rdは、下流側ニップロール機構54Dの一対のニップロール54Ru,54Rdの周速値(mpm)よりも小さい周速値(mpm)で回転する。そして、これにより、糸ゴムの連続体35aは伸長される。より具体的に言えば、前者54Uのニップロール54Ru,54Rdは、後者54Dのニップロール54Ru,54Rdの周速値の伸長倍率の目標値分の1の周速値で回転し、これにより、同糸ゴムの連続体35aがこれらニップロール機構54U,54D同士の間を通過中に、同連続体35aは上記目標値まで伸長される。
また、下流側ニップロール機構54Dのニップロール54Ru,54Rdの周速値(mpm)は、超音波溶着装置60のアンビルロール61aの周速値(mpm)と連動するように調整され、これにより、互いの周速値が概ね同値となるように制御される。よって、アンビルロール61a上での伸長倍率の大きさは、伸長装置54で付与された伸長倍率の大きさに維持される。
The stretching device 54 includes an upstream nip roll mechanism 54U arranged at a predetermined position in the transport direction and a downstream nip roll mechanism 54D arranged on the downstream side of the upstream nip roll mechanism 54U. Both of the nip roll mechanisms 54U and 54D have a pair of upper and lower nip rolls 54Ru and 54Rd that rotate by driving, and the pair of nip rolls 54Ru and 54Rd do not show as a driving source while slightly pressing the continuous body 35a of the rubber thread. It is driven and rotated by the servo motor of. Further, the pair of nip rolls 54Ru and 54Rd of the upstream side nip roll mechanism 54U rotate at a peripheral speed value (mpm) smaller than the peripheral speed value (mpm) of the pair of nip rolls 54Ru and 54Rd of the downstream side nip roll mechanism 54D. As a result, the thread rubber continuum 35a is stretched. More specifically, the former 54U nip rolls 54Ru and 54Rd rotate at a peripheral speed value that is 1/1 of the target value of the extension ratio of the peripheral speed value of the latter 54D nip rolls 54Ru and 54Rd. While the continuum 35a of the above is passing between the nip roll mechanisms 54U and 54D, the continuum 35a is extended to the above target value.
Further, the peripheral speed values (mpm) of the nip rolls 54Ru and 54Rd of the downstream nip roll mechanism 54D are adjusted so as to be interlocked with the peripheral speed values (mpm) of the anvil roll 61a of the ultrasonic welding device 60, whereby each other The peripheral speed values are controlled to be approximately the same. Therefore, the magnitude of the elongation ratio on the anvil roll 61a is maintained at the magnitude of the elongation ratio given by the extension device 54.

超音波溶着装置60は、搬送方向に沿って回転するアンビルロール61a(ロールに相当)と、アンビルロール61aの回転方向Dc61aの所定位置P61hに配置されたホーン61hと、を有する。 The ultrasonic welding device 60 has an anvil roll 61a (corresponding to a roll) that rotates along the transport direction, and a horn 61h that is arranged at a predetermined position P61h in the rotation direction Dc61a of the anvil roll 61a.

ホーン61hは、適宜な支持部材61sによって上記所定位置P61hに概ね移動不能に位置するように支持されている。また、同ホーン61hは、アンビルロール61aの外周面61asに対向して配された平らな振動面61hsを有する。そして、同面61hsは、上記外周面61asとの間の間隔を拡縮する方向に振動する。振動の周波数は例えば20kHz〜35kHzの所定値であり、また、振幅は例えば1ミクロン〜30ミクロンの所定値である。よって、振動面61hsは超音波振動して、これにより、同面61hsと外周面61asとの間を通過する両シート32a,33aを超音波溶着する。すなわち、両シート32a,33aに前述の溶着部jを形成する。ちなみに、かかる振動の発生は、ホーン61hに接続された不図示のコンバータのピエゾ素子に上記周波数の電気信号を入力すること等で行われる。 The horn 61h is supported by an appropriate support member 61s so as to be substantially immovable at the predetermined position P61h. Further, the horn 61h has a flat vibration surface 61hs arranged so as to face the outer peripheral surface 61as of the anvil roll 61a. Then, the same surface 61hs vibrates in a direction of expanding or contracting the distance between the same surface 61hs and the outer peripheral surface 61as. The frequency of vibration is, for example, a predetermined value of 20 kHz to 35 kHz, and the amplitude is, for example, a predetermined value of 1 micron to 30 micron. Therefore, the vibrating surface 61hs is ultrasonically vibrated, whereby both sheets 32a and 33a passing between the same surface 61hs and the outer peripheral surface 61as are ultrasonically welded. That is, the above-mentioned welded portion j is formed on both the sheets 32a and 33a. Incidentally, the generation of such vibration is performed by inputting an electric signal having the above frequency to the piezo element of the converter (not shown) connected to the horn 61h.

アンビルロール61aは、軸受けなどの適宜な不図示の支持部材によって、CD方向に沿った回転軸回りに回転可能に支持されている。そして、同ロール61aは、駆動源としてのサーボモータ(不図示)から駆動力を付与されて駆動回転する。また、同ロール61aには、上述の搬送ローラー51Rから送られる第1連続シート32aと、上述の搬送ローラー52Rから送られる第2連続シート33aと、上述の伸長装置54の下流側ニップロール機構54Dから送られる糸ゴムの連続体35aとの三者が、それぞれ、同ロール61aの外周面61asに概ね相対滑り無く巻き付いている。よって、アンビルロール61aが駆動回転することにより、アンビルロール61aの周速値と同じ搬送速度値で、第1連続シート32a、第2連続シート33a、及び糸ゴムの連続体35aの三者は、同ロール61aの外周面61asに沿って搬送される。すなわち、同外周面61asに沿って曲がった搬送経路でこれら両連続シート32a,33a及び糸ゴムの連続体35aは搬送される。 The anvil roll 61a is rotatably supported around a rotation axis along the CD direction by an appropriate support member (not shown) such as a bearing. Then, the roll 61a is driven and rotated by applying a driving force from a servomotor (not shown) as a driving source. Further, the roll 61a is provided with the first continuous sheet 32a sent from the above-mentioned transport roller 51R, the second continuous sheet 33a sent from the above-mentioned transport roller 52R, and the downstream nip roll mechanism 54D of the above-mentioned extension device 54. The three elements of the rubber thread continuum 35a to be fed are wound around the outer peripheral surface 61as of the roll 61a without any relative slippage. Therefore, as the anvil roll 61a is driven and rotated, the first continuous sheet 32a, the second continuous sheet 33a, and the continuous body 35a of the rubber thread have the same transport speed value as the peripheral speed value of the anvil roll 61a. It is conveyed along the outer peripheral surface 61as of the roll 61a. That is, both the continuous sheets 32a and 33a and the continuous body 35a of the rubber thread are conveyed by the conveying path curved along the outer peripheral surface 61as.

ここで、前述の第1連続シート32aの搬送ローラー51Rの周速値(mpm)及び第2連続シート33aの搬送ローラー52Rの周速値(mpm)は、それぞれ、当該アンビルロール61aの周速値(mpm)と概ね同値である。よって、第1連続シート32a及び第2連続シート33aについては、概ね伸長せずに、しかも弛まない程度に張った状態でアンビルロール61aに巻き付く。一方、糸ゴムの連続体35aの下流側ニップロール機構54Dの一対のニップロール54Ru,54Rdの周速値(mpm)も、アンビルロール61aの周速値(mpm)と概ね同値であるが、ここで、当該一対のニップロール54Ru,54Rdの位置では、糸ゴムの連続体35aは、既に伸長倍率の目標値まで伸長された状態にある。よって、同連続体35aは当該目標値まで伸長された状態でアンビルロール61aに巻き付いて、同ロール61aの回転によって連続シート32a,33aと一緒に搬送されていく。 Here, the peripheral speed value (mpm) of the transport roller 51R of the first continuous sheet 32a and the peripheral speed value (mpm) of the transport roller 52R of the second continuous sheet 33a are the peripheral speed values of the anvil roll 61a, respectively. It is almost the same value as (mpm). Therefore, the first continuous sheet 32a and the second continuous sheet 33a are wound around the anvil roll 61a in a state of being stretched to such an extent that they do not stretch and do not loosen. On the other hand, the peripheral speed values (mpm) of the pair of nip rolls 54Ru and 54Rd of the downstream nip roll mechanism 54D of the thread rubber continuum 35a are also substantially the same as the peripheral speed values (mpm) of the anvil roll 61a. At the positions of the pair of nip rolls 54Ru and 54Rd, the rubber thread continuum 35a is already stretched to the target value of the stretch ratio. Therefore, the continuous body 35a is wound around the anvil roll 61a in a state of being extended to the target value, and is conveyed together with the continuous sheets 32a and 33a by the rotation of the roll 61a.

また、この例では、アンビルロール61aに巻き付く順番は、第1連続シート32aが最初に巻き付き、次に糸ゴムの連続体35aが巻き付き、最後に第2連続シート33aが巻き付く。そして、これにより、これら三者は、アンビルロール61aの外周面61as上において第1連続シート32aと第2連続シート33aとの間に糸ゴムの連続体35aが介挿された状態にされる。 Further, in this example, in the order of winding around the anvil roll 61a, the first continuous sheet 32a is wound first, then the continuous body 35a of the rubber thread is wound, and finally the second continuous sheet 33a is wound. As a result, these three parties are brought into a state in which the continuous body 35a of the rubber thread is inserted between the first continuous sheet 32a and the second continuous sheet 33a on the outer peripheral surface 61as of the anvil roll 61a.

一方、図9A及び図9Bに示すように、かかるアンビルロール61aの外周面61asには、前述の接合部j,j…に対応するように複数の凸部61at,61at…が突出形成されている。そして、糸ゴムの連続体35aが介挿された第1及び第2連続シート32a,33aが、アンビルロール61aの回転に基づいてホーン61hの配置位置P61hを通過する際には、ホーン61hの振動面61hsから超音波振動エネルギーが当該両シート32a,33aに投入される。よって、同両シート32a,33aの一対の対向面32ast,33astは、図9Bに示すように凸部61atに対応する位置で部分的に発熱して溶融し、その結果、前述したような複数の溶着部j,j…が非連続に分散した接合パターンで両シート32a,33aの一対の対向面32ast,33ast同士が接合される。そして、かかる溶着部jで接合された第1連続シート32aと第2連続シート33aとは互いの間に糸ゴムの連続体35aが介挿された状態で、搬送方向の下流にある前述の第2加工位置PK2へと送出される。 On the other hand, as shown in FIGS. 9A and 9B, a plurality of convex portions 61at, 61at ... Are formed so as to correspond to the above-mentioned joint portions j, j ... On the outer peripheral surface 61as of the anvil roll 61a. .. Then, when the first and second continuous sheets 32a and 33a inserted with the continuous body 35a of the thread rubber pass through the arrangement position P61h of the horn 61h based on the rotation of the anvil roll 61a, the vibration of the horn 61h Ultrasonic vibration energy is applied to both sheets 32a and 33a from the surface 61hs. Therefore, as shown in FIG. 9B, the pair of facing surfaces 32ast and 33ast of both sheets 32a and 33a partially generate heat and melt at the positions corresponding to the convex portions 61at, and as a result, a plurality of the above-mentioned sheets as described above. The pair of facing surfaces 32ast, 33ast of both sheets 32a, 33a are joined to each other in a joining pattern in which the welded portions j, j ... Are dispersed discontinuously. Then, the first continuous sheet 32a and the second continuous sheet 33a joined by the welding portion j are in a state where the continuous body 35a of the rubber thread is inserted between the first continuous sheet 32a and the second continuous sheet 33a, and the above-mentioned first continuous sheet is downstream in the transport direction. 2 It is sent to the processing position PK2.

ところで、図6A及び図6Bを参照して前述したように、各糸ゴム35は、上記の溶着部j,j同士の挟圧のみに概ね基づいて腹側帯部材31に取り付けられている。そのため、腹側帯部材31を再伸長等して糸ゴム35を再度伸長した場合に、当該糸ゴム35に作用する上記の挟圧の力が小さくなって、同糸ゴム35は、溶着部j,jから伸縮方向たる横方向に滑り得る。そして、仮にその状態で伸長状態を再度緩和すると、滑ってずれた位置のまま、糸ゴム35が溶着部j,j同士の挟圧で再度取り付けられてしまって、その結果、腹側帯部材31の伸縮性が横方向の全長に亘って略均等な適正状態から、部分的に伸縮性が偏った不適正状態に変化してしまう恐れがある。 By the way, as described above with reference to FIGS. 6A and 6B, each rubber thread 35 is attached to the ventral band member 31 based solely on the pinching pressure between the welded portions j and j. Therefore, when the thread rubber 35 is stretched again by re-stretching the ventral band member 31 or the like, the force of the above-mentioned pinching pressure acting on the thread rubber 35 becomes small, and the thread rubber 35 becomes the welded portion j. It can slide laterally from j in the expansion and contraction direction. Then, if the stretched state is relaxed again in that state, the thread rubber 35 is reattached by the pinching pressure between the welded portions j and j while remaining in the slipped and displaced position, and as a result, the ventral band member 31 There is a risk that the elasticity may change from an appropriate state in which the elasticity is substantially uniform over the entire length in the lateral direction to an inappropriate state in which the elasticity is partially biased.

この点につき、仮に、糸ゴムの連続体35aの搬送方向と直交する断面での形状が、図11Aのような正円形ではなく、図11Bのような長手方向(最も長さの長い方向のこと)及び短手方向(長手方向と交差する方向において長手方向よりも長さの短い方向のことであり、最も長さの短い方向のこと)を有した形状の場合には、後述の所定の工夫をすることにより、上記の滑りを抑制可能である。そして、この点につき、この例では、スパンデックスSPDを用いた糸ゴムの連続体35aが使用されている。すなわち、同図11Bに示すように、かかる糸ゴムの連続体35aは、溶融紡糸して生成した複数のスパンテックス(弾性繊維)SPD,SPD…を自己溶着で束ねたものであるが、これらスパンデックスSPD,SPD…の配列等に基づいて、連続体35aの上記断面での形状は、長円や長方形等の長手方向を有した扁平形状となっている。よって、本実施形態でも所定の工夫をしていて、これにより、上記の溶着部j,jからの滑りを抑制している。 Regarding this point, it is assumed that the shape of the continuous body 35a of the rubber thread in the cross section orthogonal to the transport direction is not a perfect circle as shown in FIG. 11A, but a longitudinal direction (the direction having the longest length) as shown in FIG. 11B. ) And the lateral direction (the direction that intersects the longitudinal direction and has a shorter length than the longitudinal direction, and the direction that has the shortest length), the predetermined device described later. By doing so, the above slippage can be suppressed. In this regard, in this example, a rubber thread continuum 35a using spandex SPD is used. That is, as shown in FIG. 11B, the continuum 35a of the rubber thread is a bundle of a plurality of spantex (elastic fiber) SPDs, SPDs, etc. produced by melt spinning, which are self-welded. Based on the arrangement of SPDs, SPDs, etc., the shape of the continuum 35a in the above cross section is a flat shape having a longitudinal direction such as an oval or a rectangle. Therefore, even in the present embodiment, a predetermined device is devised, thereby suppressing slippage from the welded portions j and j.

ちなみに、スパンデックスSPDを用いた糸ゴムの連続体35aの上記断面での形状が、図11Bのような長手方向を有した扁平形状になる理由については、次のようなことが考えられる。先ず、同連続体35aは、上述のように溶融紡糸して生成した複数のスパンデックスSPD,SPD…を自己溶着で束ねたものであるが、ここで、この連続体35aが資材コイル35aCの状態に紙管35aCsに巻き取られる際には、巻き取り方向に張力が作用した状態で巻き取られる。また、巻き取り済みの資材コイル35aCの状態においても、同連続体35aには、上記張力に起因して資材コイル35aCの半径方向の内方を向いた巻き締め力が作用している。よって、この巻き締め力により、同資材コイル35aCの半径方向に同連続体35aが潰れるように、複数のスパンデックスSPD,SPD…が再配列等して固定されてしまい、その結果、上記断面での形状が、長円や略長方形等の長手方向を有した扁平形状になってしまうものと考えられる。 Incidentally, the reason why the shape of the continuous body 35a of the rubber thread using the spandex SPD in the cross section becomes a flat shape having a longitudinal direction as shown in FIG. 11B can be considered as follows. First, the continuum 35a is a bundle of a plurality of spandex SPDs, SPDs, etc. produced by melt spinning as described above by self-welding. Here, the continuum 35a is in the state of the material coil 35aC. When it is wound around the paper tube 35aCs, it is wound in a state where tension is applied in the winding direction. Further, even in the state of the material coil 35aC that has already been wound up, a winding force that is directed inward in the radial direction of the material coil 35aC acts on the continuum 35a due to the above tension. Therefore, due to this winding force, the plurality of spandex SPDs, SPDs ... Are rearranged and fixed so that the continuum 35a is crushed in the radial direction of the material coil 35aC, and as a result, in the above cross section. It is considered that the shape becomes a flat shape having a longitudinal direction such as an oval or a substantially rectangular shape.

以下、溶着部j,jからの糸ゴム35の滑りを抑制するための工夫について説明する。
一般に、糸ゴムの連続体35aの上記断面での長手方向は、搬送方向の位置に応じて色々な方向を向き得るが、先ず、この向きについて次のように定義する。すなわち、図12Aに示すように、連続シート32aの上記対向面32astに当接する糸ゴムの連続体35aのうちで同面32astに対して上記長手方向がなす角度θが45°以上の部分を「起立状部分35ak」と定義し、図12Bに示すように、同対向面32astに対して同長手方向がなす角度θが45°未満の部分を「横たわり状部分35ay」と定義する。
Hereinafter, a device for suppressing the slippage of the rubber thread 35 from the welded portions j and j will be described.
In general, the longitudinal direction of the rubber thread continuum 35a in the cross section may be oriented in various directions depending on the position in the transport direction. First, this orientation is defined as follows. That is, as shown in FIG. 12A, the portion of the continuous body 35a of the rubber thread that abuts on the facing surface 32ast of the continuous sheet 32a and the angle θ formed by the longitudinal direction with respect to the same surface 32ast is 45 ° or more. An upright portion 35ak is defined, and as shown in FIG. 12B, a portion where the angle θ formed by the longitudinal direction with respect to the facing surface 32ast is less than 45 ° is defined as a “lying portion 35ay”.

すると、この定義では、後者の横たわり状部分35ayの方が、前者の起立状部分35akよりもCD方向に大きくなるが、そうすると、同糸ゴムの連続体35aが切断されて糸ゴム35の伸長状態が緩和された際に起こるべき溶着部j,j同士によるCD方向の挟圧は、起立状部分35akよりも横たわり状部分35ayの方が強くなる。 Then, in this definition, the latter lying portion 35ay is larger in the CD direction than the former standing portion 35ak, but then the continuum 35a of the same thread rubber is cut and the thread rubber 35 is in an extended state. The pinching pressure between the welded portions j and j in the CD direction, which should occur when the is relaxed, is stronger in the lying portion 35ay than in the standing portion 35ak.

そこで、本実施形態では、上記工夫として、同連続シート32aへの糸ゴムの連続体35aの当接に伴って同連続体35aの姿勢を変更することにより、搬送方向の単位長さにおいて起立状部分35akが占める搬送方向の長さよりも横たわり状部分35ayが占める搬送方向の長さの方を長くしている。すなわち、基本的に、横たわり状部分35ayの長さができる限り長くなるように、同連続体35aの姿勢を変更している。そして、この変更後の姿勢を維持しながら、溶着部j,jを、CD方向において糸ゴムの連続体35aの両側の位置にそれぞれ形成している。 Therefore, in the present embodiment, as the above-mentioned device, the posture of the continuous body 35a is changed according to the contact of the continuous body 35a of the rubber thread with the continuous sheet 32a, so that the continuous body 35a stands upright in the unit length in the transport direction. The length in the transport direction occupied by the lying portion 35ay is longer than the length in the transport direction occupied by the portion 35ak. That is, basically, the posture of the continuum 35a is changed so that the length of the lying portion 35ay is as long as possible. Then, while maintaining the changed posture, the welded portions j and j are formed at positions on both sides of the thread rubber continuum 35a in the CD direction, respectively.

よって、第5加工位置PK5の上記切断工程の後の時点、すなわち溶着部j,j同士で糸ゴム35をCD方向から挟圧した状態の時には、上述の如く横たわり状部分35ayが搬送方向に長く確保された状態になる。すると、上記溶着部j,j同士が糸ゴム35を横たわり状部分35ayで挟圧する確率が高くなって、これにより、溶着部j,j同士で糸ゴム35を強く挟圧する確率が高くなる。そして、その結果、溶着部j,jからの糸ゴム35の滑りを抑制可能となる。 Therefore, at the time after the cutting step of the fifth processing position PK5, that is, when the thread rubber 35 is sandwiched between the welded portions j and j from the CD direction, the lying portion 35ay becomes longer in the conveying direction as described above. It will be in a secured state. Then, the probability that the welded portions j and j hold the thread rubber 35 between the lying portions 35ay increases, and thus the probability that the welded portions j and j strongly hold the thread rubber 35 between the welded portions j and j increases. As a result, the slip of the rubber thread 35 from the welded portions j and j can be suppressed.

なお、ここで望ましくは、糸ゴムの連続体35aの単位長さを「1」とした場合に、横たわり状部分35ayの長さを0.7以上にすると良く、より望ましくは0.8以上、より一層望ましくは0.9以上にすると良い。そして、このようにしていれば、上記の確率をより一層高めることができる。 Here, it is desirable that the length of the lying portion 35ay is 0.7 or more, more preferably 0.8 or more, when the unit length of the continuous rubber thread 35a is "1". Even more preferably, it should be 0.9 or more. Then, if this is done, the above probability can be further increased.

また、このような糸ゴムの連続体35aの姿勢の変更の実現は、アンビルロール61aの外周面61as上においてなすことができる。すなわち、この例では、図9Aに示すように、アンビルロール61aの外周面61asには連続シート32aが所定の巻き付き角度θ32aで巻き付いているが、当該巻き付き角度θ32aで巻き付いている範囲において同連続シート32aの上記対向面32astに対して、更に糸ゴムの連続体35aを所定の巻き付き角度θ35aで巻き付けて同面32astに当接させている。 Further, such a change in the posture of the rubber thread continuum 35a can be realized on the outer peripheral surface 61as of the anvil roll 61a. That is, in this example, as shown in FIG. 9A, the continuous sheet 32a is wound around the outer peripheral surface 61as of the anvil roll 61a at a predetermined winding angle θ32a, but the continuous sheet is wound within the range of winding at the winding angle θ32a. A continuous body 35a of rubber thread is further wound around the facing surface 32ast of 32a at a predetermined winding angle θ35a to be brought into contact with the same surface 32ast.

すると、この巻き付けられた状態で回転方向Dc61aに搬送される過程でも、糸ゴムの連続体35aが伸長状態にあることから、その張力に基づいて、上述の横たわり状部分35ayが増えるように糸ゴムの連続体35aの姿勢が変更される。そして、その姿勢が維持されたまま、更に糸ゴムの連続体35aを覆うように連続シート33aが合流して、連続シート32a,33a同士の間に糸ゴムの連続体35aが介挿された状態になる。そして最後に、この状態のまま、前述のホーン61hの位置P61hを通過して、当該通過時に、連続シート32a,33a同士に溶着部jが形成される。 Then, even in the process of being conveyed in the rotational direction Dc61a in this wound state, since the continuous body 35a of the thread rubber is in the stretched state, the thread rubber is increased so as to increase the above-mentioned lying portion 35ay based on the tension. The posture of the continuum 35a is changed. Then, while the posture is maintained, the continuous sheets 33a are joined so as to cover the continuous sheet 33a of the thread rubber, and the continuous body 35a of the thread rubber is inserted between the continuous sheets 32a and 33a. become. Finally, in this state, the horn 61h passes through the position P61h, and at the time of passing, the welding portions j are formed between the continuous sheets 32a and 33a.

ちなみに、上記の巻き付き角度θ35aは、例えば20°〜270°の範囲から選択され、望ましくは45°〜210°の範囲、より望ましくは60°〜180°の範囲から選択される。 By the way, the wrapping angle θ35a is selected from, for example, a range of 20 ° to 270 °, preferably from a range of 45 ° to 210 °, and more preferably from a range of 60 ° to 180 °.

ところで、この例のように糸ゴムの連続体35aの繰り出しがオーバーエンド解舒方式である場合には、図10を参照して前述したように資材コイル35aCからの繰り出しによって糸ゴムの連続体35aが捻られる。すなわち、資材コイル35aCの外周面での繰り出し位置PTOが周方向に一回転する度に、糸ゴムの連続体35aは、搬送方向に沿った軸回りに一回だけ捻られる。一方、上述のようにアンビルロール61a上では、基本的に横たわり状部分35ayになるように糸ゴムの連続体35aの姿勢は、規制されている。 By the way, when the extension of the thread rubber continuum 35a is the over-end unwinding method as in this example, the thread rubber continuum 35a is extended from the material coil 35aC as described above with reference to FIG. Is twisted. That is, each time the feeding position PTO on the outer peripheral surface of the material coil 35aC makes one rotation in the circumferential direction, the continuous body 35a of the rubber thread is twisted only once about the axis along the conveying direction. On the other hand, as described above, on the anvil roll 61a, the posture of the thread rubber continuum 35a is regulated so as to basically form a lying portion 35ay.

そのため、上述の捻れは、図9Aの繰り出し装置53UWとアンビルロール61aとの間の位置に蓄積されていくが、どこかの時点で同連続体35aの弾性ねじれ変形の限界がきて、それ以上の蓄積が困難になると、蓄積されていた捻れが、一気に搬送方向の下流側へとアンビルロール61aを越えて流れていき、これにより、捻れの蓄積がほぼ皆無の状態まで解消される。すると、以降の繰り出しによって、また上記位置に捻れが蓄積されていき、更にどこかの時点で蓄積された捻れが一気に下流側へ流れるということを繰り返す。 Therefore, the above-mentioned twist is accumulated at the position between the feeding device 53UW and the anvil roll 61a in FIG. 9A, but at some point, the limit of elastic torsional deformation of the continuum 35a is reached, and the twist is more than that. When the accumulation becomes difficult, the accumulated twists flow to the downstream side in the transport direction at once over the anvil roll 61a, whereby the accumulation of twists is eliminated to a state where there is almost no accumulation. Then, the twists are accumulated at the above-mentioned position by the subsequent feeding, and the twists accumulated at some point flow to the downstream side at a stretch.

ここで、糸ゴムの連続体35aのうちで上記のように下流側へと一気に流れていく上記捻れの部分を「捻れ状部分35an」と言う場合に、この捻れ状部分35anは捻れているので、横たわり状部分35ayと起立状部分35akとを有している。
図13は、かかる捻れ状部分35anを平面視で示す概略説明図である。同図13に示すように、横たわり状部分35ayは、更に2種類に大別される。つまり、搬送方向の長さが所定長さ以上の長尺横たわり状部分35ayLと、同方向の長さが所定長さ未満の短尺横たわり状部分35aySと、に大別される。上記の所定長さの一例としては5mmを例示できる。そして、捻れ状部分35anは、短尺横たわり状部分35atSと起立状部分35akとを交互に並んだ状態で有している。また、捻れ状部分35anの搬送方向の両側には、長尺横たわり状部分35ayL,35ayLがそれぞれ位置していて、つまり、搬送方向に隣り合う長尺横たわり状部分35ayL,35ayL同士の間に捻れ状部分35anが位置している。更に、この例では、このような捻れ状部分35anを有した糸ゴムの連続体35a,35a…は、図8Bに示すように、CD方向に間隔をあけて複数本並んで配置されている。
Here, when the twisted portion of the thread rubber continuum 35a that flows to the downstream side at once as described above is referred to as a "twisted portion 35an", the twisted portion 35an is twisted. It has a lying portion 35ay and an upright portion 35ak.
FIG. 13 is a schematic explanatory view showing the twisted portion 35an in a plan view. As shown in FIG. 13, the lying portion 35ay is further roughly classified into two types. That is, it is roughly classified into a long horizontal portion 35ayL having a length in the transport direction of a predetermined length or more and a short horizontal portion 35ayS having a length in the same direction of less than a predetermined length. As an example of the above-mentioned predetermined length, 5 mm can be exemplified. The twisted portion 35an has a short lying portion 35atS and an upright portion 35ak alternately arranged side by side. Further, long horizontal portions 35ayL and 35ayL are located on both sides of the twisted portion 35an in the transport direction, that is, twisted between the long horizontal portions 35ayL and 35ayL adjacent to each other in the transport direction. Part 35an is located. Further, in this example, a plurality of thread rubber continuums 35a, 35a ... Having such a twisted portion 35an are arranged side by side at intervals in the CD direction, as shown in FIG. 8B.

そして、これら複数本の糸ゴムの連続体35a,35a…のうちの1つの糸ゴムの連続体35aを「第1糸ゴムの連続体35a1」(第1弾性部材の連続体に相当)と言い、他の1つの糸ゴムの連続体35aを「第2糸ゴムの連続体35a2」(第2弾性部材の連続体に相当)と言った場合に、望ましくは、図14に示すように、第1糸ゴムの連続体35a1が有する複数の捻れ状部分35an,35an…のうちの少なくとも1つの捻れ状部分35anと、第2糸ゴムの連続体35a2が有する複数の捻れ状部分35an,35an…のうちで第1糸ゴムの連続体35a1の上記捻れ状部分35anに最も近い捻れ状部分35anとが、搬送方向にオーバーラップしないように第1糸ゴムの連続体35a1の姿勢と第2糸ゴムの連続体35a2の姿勢とを変更すると良い。 Then, the continuous body 35a of one of the plurality of rubber thread rubbers 35a, 35a ... Is referred to as "the continuous body 35a1 of the first thread rubber" (corresponding to the continuous body of the first elastic member). , When the other one rubber thread continuous body 35a is referred to as "second thread rubber continuous body 35a2" (corresponding to the continuous body of the second elastic member), preferably, as shown in FIG. At least one twisted portion 35an of the plurality of twisted portions 35an, 35an ... Of the one-thread rubber continuum 35a1, and the plurality of twisted portions 35an, 35an ... Of the plurality of twisted portions 35a2 of the second thread rubber continuum 35a2. The posture of the first rubber continuum 35a1 and the posture of the second rubber so that the twisted portion 35an closest to the twisted portion 35an of the first rubber continuum 35a1 does not overlap in the transport direction. It is preferable to change the posture of the continuum 35a2.

このようにしていれば、第5加工位置PK5の切断工程の後に、搬送方向の互いに同じ位置で第1糸ゴム35と第2糸ゴム35とが、それぞれ対応する溶着部j,jから滑ってしまって伸縮性の偏りが大きく顕在化してしまうという不具合を抑制することができる。詳しくは次の通りである。 In this way, after the cutting step of the fifth processing position PK5, the first thread rubber 35 and the second thread rubber 35 slide from the corresponding welding portions j and j at the same positions in the transport direction. It is possible to suppress the problem that the bias of elasticity becomes large and becomes apparent. The details are as follows.

先ず、図13を参照して前述したように、捻れ状部分35anは、起立状部分35akと短尺横たわり状部分35aySとが複数並んで捻れたものであるので、上記断面での形状の長手方向の向きは、搬送方向の位置に応じて変化している。すなわち、当該捻れ状部分35anは、搬送方向の長い範囲に亘って上記断面の長手方向が略CD方向を向いた類いのものではない。
そのため、かかる捻れ状部分35anは、上記切断工程の後で起こるべき上記溶着部j,j同士のCD方向の挟圧が比較的弱くなる部分であり、これにより、第1糸ゴム35及び第2糸ゴム35のそれぞれにおいて上記溶着部j,j同士から搬送方向に比較的滑り易い部分である。
First, as described above with reference to FIG. 13, since the twisted portion 35an is a twisted portion in which a plurality of standing portions 35ak and short horizontal portions 35ayS are arranged side by side, the twisted portion 35an is twisted in the longitudinal direction of the shape in the cross section. The orientation changes depending on the position in the transport direction. That is, the twisted portion 35an is not of the type in which the longitudinal direction of the cross section faces the CD direction over a long range in the transport direction.
Therefore, the twisted portion 35an is a portion where the pinching pressure between the welded portions j and j in the CD direction, which should occur after the cutting step, is relatively weak, whereby the first rubber thread 35 and the second thread rubber 35 and the second thread rubber 35an. Each of the rubber threads 35 is a portion that is relatively slippery in the transport direction from the welded portions j and j.

他方、この点につき、当該図14の例では、第1糸ゴムの連続体35a1の少なくとも1つの捻れ状部分35anが、これに最も近い第2糸ゴムの連続体35a2の捻れ状部分35anに対して搬送方向にオーバーラップしないようにしている。よって、第1糸ゴム35と第2糸ゴム35との間で、滑り易い位置を搬送方向に分散させることができる。そして、これにより、伸縮性の偏りが、搬送方向の所定位置、つまりおむつ1の横方向の所定位置で大きく生じてしまうことを抑制可能となる。 On the other hand, regarding this point, in the example of FIG. 14, at least one twisted portion 35an of the first thread rubber continuum 35a1 is relative to the twisted portion 35an of the second thread rubber continuum 35a2 closest thereto. It is designed so that it does not overlap in the transport direction. Therefore, the slippery position can be dispersed in the transport direction between the first thread rubber 35 and the second thread rubber 35. As a result, it is possible to prevent a large deviation in elasticity from occurring at a predetermined position in the transport direction, that is, at a predetermined position in the lateral direction of the diaper 1.

なお、このことは、次のように言い換えることができる。すなわち、「第1糸ゴムの連続体35a1が有する複数の捻れ状部分35an,35an…のうちの少なくとも1つの捻れ状部分35anが、第2糸ゴムの連続体35aが有する長尺横たわり状部分35ayLに搬送方向の位置に関して含まれている」と言うこともできる。 This can be rephrased as follows. That is, "at least one twisted portion 35an of the plurality of twisted portions 35an, 35an ... Of the continuous body 35a1 of the first thread rubber is a long horizontal portion 35ayL of the continuous body 35a of the second thread rubber. Is included with respect to the position in the transport direction. "

このように第1糸ゴムの連続体35a1の捻れ状部分35anと第2糸ゴムの連続体35a2の捻れ状部分35anとが搬送方向にオーバーラップしないようにすることの実現は、例えば次のようにしてなすことができる。
先ず、図10を参照して前述のように、繰り出し位置PTOが資材コイル35aCの外周面を一周する度に糸ゴムの連続体35a1,35a2は一回捻られることから、捻られるピッチは、そのときの外周面の周長と概ね一致する。また、捻られるピッチに応じて、上述の捻れの蓄積が変化し、結果、捻れ状部分35anの発生タイミングも変化する。
In this way, the realization of preventing the twisted portion 35an of the continuous body 35a1 of the first thread rubber and the twisted portion 35an of the continuous body 35a2 of the second thread rubber from overlapping in the transport direction is realized, for example, as follows. Can be done.
First, as described above with reference to FIG. 10, since the thread rubber continuums 35a1 and 35a2 are twisted once each time the feeding position PTO goes around the outer peripheral surface of the material coil 35aC, the twisting pitch is the same. It is almost the same as the circumference of the outer peripheral surface. Further, the accumulation of the above-mentioned twist changes according to the twisted pitch, and as a result, the generation timing of the twisted portion 35an also changes.

そのため、繰り出し中の互いの第1糸ゴムの連続体35a1の資材コイル35aCの外径寸法と第2糸ゴムの連続体35a2の資材コイル35aCの外径寸法とを同時に比較した場合に、互いの外径寸法が一致しないように一方の資材コイル35aCの外径寸法を調整すれば良い。すなわち、そのようにすれば、繰り出しに伴って糸ゴムの連続体35a1,35a2が捻られるピッチを、第1糸ゴムの連続体35a1と第2糸ゴムの連続体35a2との間で互いに相違させることができる。そして、これにより、前述の捻れの蓄積の限界となるタイミングを、第1糸ゴムの連続体35a1の資材コイル35aCと第2糸ゴムの連続体35a2の資材コイル35aCとの間で互いに相違させることができて、その結果、第1糸ゴムの連続体35a1の捻れ状部分35anと第2糸ゴムの連続体35a2の捻れ状部分35anとが搬送方向にオーバーラップしないようにすることができる。
なお、図8Bでは表現できていないが、この例では、腹側帯部材31の連続シート32a,33aに設けられる全ての糸ゴムの連続体35a,35a…が、上記の第1糸ゴムの連続体35a1に該当している。但し、何等これに限らない。例えば、腹側帯部材31に係る全ての糸ゴムの連続体35a,35a…のうちの少なくとも1つ、望ましくは3分の1以上、より望ましくは半数以上、より一層望ましくは3分の2以上の糸ゴムの連続体35aが上述の第1糸ゴムの連続体35a1に該当していれば、少なくともその該当の糸ゴムの連続体35aについては上記の作用効果を奏することができる。そのため、腹側帯部材31に係る全ての糸ゴムの連続体35aの中に、第1糸ゴムの連続体35a1に該当しない糸ゴムの連続体35aが存在していても構わない。
Therefore, when the outer diameter dimension of the material coil 35aC of the continuous body 35a1 of the first thread rubber and the outer diameter dimension of the material coil 35aC of the continuous body 35a2 of the second thread rubber are compared at the same time, they are mutually fed. The outer diameter of one of the material coils 35aC may be adjusted so that the outer diameters do not match. That is, in this way, the pitch at which the thread rubber continuums 35a1 and 35a2 are twisted with the feeding is made different between the first thread rubber continuum 35a1 and the second thread rubber continuum 35a2. be able to. As a result, the timing at which the above-mentioned twist accumulation limit is reached is made different between the material coil 35aC of the first thread rubber continuum 35a1 and the material coil 35aC of the second thread rubber continuum 35a2. As a result, the twisted portion 35an of the continuous body 35a1 of the first thread rubber and the twisted portion 35an of the continuous body 35a2 of the second thread rubber can be prevented from overlapping in the transport direction.
Although not represented in FIG. 8B, in this example, all the thread rubber continuums 35a, 35a ... Provided on the continuous sheets 32a, 33a of the ventral band member 31 are the above-mentioned first thread rubber continuums. It corresponds to 35a1. However, it is not limited to this. For example, at least one of all the rubber thread continuums 35a, 35a ... Concerning the ventral band member 31, preferably one-third or more, more preferably half or more, and even more preferably two-thirds or more. If the thread rubber continuum 35a corresponds to the above-mentioned first thread rubber continuum 35a1, at least the corresponding thread rubber continuum 35a can exert the above-mentioned action and effect. Therefore, the thread rubber continuum 35a that does not correspond to the first thread rubber continuum 35a1 may be present in all the thread rubber continuums 35a related to the ventral band member 31.

また、この例では、図8Bに示すように、腹側帯部材31に係る連続シート32a,33aに設けられる全ての糸ゴムの連続体35a,35a…について、溶着部jは、少なくとも切断対象位置PCを含む搬送方向の所定範囲において搬送方向に所定の形成ピッチPjで形成されている。正確には、この図8Bの例では、搬送方向の全範囲に亘って溶着部jは、搬送方向に上記形成ピッチPjで形成されているが、このような場合に、望ましくは、図15に示すように、捻れ状部分35anの搬送方向の長さL35anが、溶着部jの形成ピッチPjより大きいと良い。 Further, in this example, as shown in FIG. 8B, the welded portion j is at least the cutting target position PC for all the thread rubber continuums 35a, 35a ... Provided on the continuous sheets 32a, 33a related to the ventral band member 31. It is formed at a predetermined formation pitch Pj in the transport direction in a predetermined range in the transport direction including. To be precise, in the example of FIG. 8B, the welded portion j is formed at the formation pitch Pj in the transport direction over the entire range in the transport direction. In such a case, preferably, FIG. 15 shows. As shown, it is preferable that the length L35an of the twisted portion 35an in the transport direction is larger than the formation pitch Pj of the welded portion j.

そして、このようになっていれば、同図15に示すように、かかる捻れ状部分35anは、少なくとも搬送方向の2カ所の位置の溶着部j,jに基づいて取り付けられる。よって、捻れ状部分35anにおいて溶着部j,j同士の挟圧が弱くなるという不具合を、溶着部jの数を増やすことで補うことができて、これにより、当該捻れ状部分35anでも比較的安定して糸ゴム35を腹側帯部材31に取り付け可能となる。 If this is the case, as shown in FIG. 15, the twisted portion 35an is attached based on the welded portions j and j at at least two positions in the transport direction. Therefore, the problem that the pinching pressure between the welded portions j and j becomes weak in the twisted portion 35an can be compensated by increasing the number of the welded portions j, whereby the twisted portion 35an is also relatively stable. Then, the thread rubber 35 can be attached to the ventral band member 31.

図16は、かかる捻れ状部分35anとサイドシール部SSとの好ましい位置関係の説明図である。なお、同図16には、図7のおむつの連続体1sにおける切断対象位置PCの近傍部分を拡大して示している。また、図16では、図を見易くする目的で、本来点線で示すべき糸ゴムの連続体35aを、実線で示している。そして、このことは、前述の図15でも同様である。
この図16の例では、第4加工位置PK4と第5加工位置PK5との間の位置においておむつの連続体1sを厚さ方向の腹側帯部材31側から見た場合に、腹側帯部材31に係る連続シート32a,33aに設けられた全ての糸ゴムの連続体35a,35a…のうちの少なくとも1つの連続体35aの捻れ状部分35anに対して溶着部対jPたる一対の溶着部j,jが設けられている。また、これに加えて、捻れ状部分35anをCD方向に跨ぐようにサイドシール部SSが設けられている。詳しくは、サイドシール部SSは、複数の溶着部SSk,SSk…をCD方向に並んで有しているが、このうちの少なくとも1つの溶着部SSkが、捻れ状部分35anをCD方向に跨ぐように同部分35anに重なって設けられている。
FIG. 16 is an explanatory view of a preferable positional relationship between the twisted portion 35an and the side seal portion SS. Note that FIG. 16 shows an enlarged portion of the vicinity of the cutting target position PC in the diaper continuum 1s of FIG. Further, in FIG. 16, the continuum 35a of the rubber thread, which should be originally shown by the dotted line, is shown by a solid line for the purpose of making the figure easier to see. And this is the same in FIG. 15 mentioned above.
In the example of FIG. 16, when the diaper continuum 1s is viewed from the ventral band member 31 side in the thickness direction at a position between the fourth processing position PK4 and the fifth processing position PK5, the ventral band member 31 A pair of welded portions j, j which are welded portions vs. jP with respect to the twisted portion 35an of at least one continuous body 35a of all the thread rubber continuums 35a, 35a ... Provided on the continuous sheets 32a, 33a. Is provided. Further, in addition to this, a side seal portion SS is provided so as to straddle the twisted portion 35an in the CD direction. Specifically, the side seal portion SS has a plurality of welded portions SSK, SSK ... Arranged in the CD direction, so that at least one welded portion SSK straddles the twisted portion 35an in the CD direction. It is provided so as to overlap the same portion 35an.

よって、溶着部j,j同士の挟圧が弱くなりがちな捻れ状部分35anについては、当該挟圧に加えて、サイドシール部SSの溶着部SSkによっても捻れ状部分35aをCD方向に挟圧することができる。そして、これにより、かかる捻れ状部分35aでも比較的安定して糸ゴム35を腹側帯部材31に取り付け可能となる。なお、このようなことの実現は、溶着部jとサイドシール部SSの溶着部SSkとの間の搬送方向の距離を、捻れ状部分35anの搬送方向の長さより小さくすることでなすことができる。すなわち、第1加工位置PK1に配された前述のヒートシール装置又は超音波シール装置のロールの外周面の凸部の配置パターンの設定及び第4加工位置PK4に配された前述のヒートシール装置又は超音波シール装置のロールの外周面の凸部の配置パターンの設定でなすことができる。 Therefore, for the twisted portion 35an in which the pinching pressure between the welded portions j and j tends to be weak, the twisted portion 35a is pinched in the CD direction by the welded portion SSK of the side seal portion SS in addition to the pinching pressure. be able to. As a result, the rubber thread 35 can be attached to the ventral band member 31 relatively stably even in the twisted portion 35a. It should be noted that such a thing can be realized by making the distance in the transport direction between the welded portion j and the welded portion SSk of the side seal portion SS smaller than the length in the transport direction of the twisted portion 35an. .. That is, the setting of the arrangement pattern of the convex portion on the outer peripheral surface of the roll of the above-mentioned heat sealing device or ultrasonic sealing device arranged at the first processing position PK1 and the above-mentioned heat sealing device or the above-mentioned heat sealing device arranged at the fourth processing position PK4. This can be done by setting the arrangement pattern of the convex portion on the outer peripheral surface of the roll of the ultrasonic sealing device.

===その他の実施の形態===
以上、本発明の実施形態について説明したが、上記の実施形態は、本発明の理解を容易にするためのものであり、本発明を限定して解釈するためのものではない。また、本発明は、その趣旨を逸脱することなく、変更や改良され得るとともに、本発明にはその等価物が含まれるのはいうまでもない。例えば、以下に示すような変形が可能である。
=== Other embodiments ===
Although the embodiments of the present invention have been described above, the above-described embodiments are for facilitating the understanding of the present invention, and are not for limiting the interpretation of the present invention. Further, it is needless to say that the present invention can be changed or improved without departing from the spirit thereof, and the present invention includes an equivalent thereof. For example, the following modifications are possible.

上述の実施形態では、図5に示すように一対の対向面32ast,33ast(42ast,43ast)同士を接合する接合部の一例として溶着部jを例示したが、何等これに限らない。例えば、接合部を接着剤で形成しても良く、その場合には、一対の対向面32ast,33ast(42ast,43ast)のうちの少なくとも一方の対向面において接合部が形成されるべき形成対象位置に選択的に接着剤が塗布されることになる。 In the above-described embodiment, as shown in FIG. 5, the welded portion j is illustrated as an example of the joint portion for joining the pair of facing surfaces 32ast, 33ast (42ast, 43ast) to each other, but the welding portion j is not limited thereto. For example, the joint portion may be formed with an adhesive, and in that case, the formation target position where the joint portion should be formed on at least one of the pair of facing surfaces 32ast, 33ast (42ast, 43ast). The adhesive will be selectively applied to.

上述の実施形態では、図5に示すように腹側帯部材31の2枚の不織布32,33に対して、弾性部材たる糸ゴム35を、本発明の方法で取り付けていたが、何等これに限らない。例えば、図3の立体ギャザーLSGを形成する目的で、同立体ギャザーLSG用のシート状部分に対して縦方向に沿った弾性部材18を取り付ける際に、本発明の方法を用いても良いし、又は吸収性本体10においてレッグギャザーLGとなる部分に対して糸ゴム等の弾性部材17を取り付ける際に、本発明の方法を用いても良い。 In the above-described embodiment, as shown in FIG. 5, the elastic member thread rubber 35 is attached to the two non-woven fabrics 32 and 33 of the ventral band member 31 by the method of the present invention, but the present invention is limited to this. Absent. For example, for the purpose of forming the three-dimensional gather LSG of FIG. 3, the method of the present invention may be used when attaching the elastic member 18 along the vertical direction to the sheet-like portion for the three-dimensional gather LSG. Alternatively, the method of the present invention may be used when attaching the elastic member 17 such as rubber thread to the portion of the absorbent body 10 that becomes the leg gather LG.

上述の実施形態では、図7に示すようにシート状部材の連続体の一例として2枚の連続シート32a,33a(42a,43a)を有した構成を例示したが、何等これに限らない。例えば、シート状部材の連続体が1枚の連続シートでも良い。そして、この場合には、当該1枚の連続シートをCD方向の所定位置で折り返すことによって一対の対向面を形成し、当該一対の対向面同士の間に糸ゴムの連続体35a(45a)を介挿することになる。 In the above-described embodiment, as shown in FIG. 7, a configuration having two continuous sheets 32a, 33a (42a, 43a) is illustrated as an example of a continuous body of sheet-like members, but the present invention is not limited to this. For example, a continuous sheet of one sheet-like member may be used. Then, in this case, a pair of facing surfaces is formed by folding back the one continuous sheet at a predetermined position in the CD direction, and a continuous body 35a (45a) of rubber threads is placed between the pair of facing surfaces. It will be inserted.

上述の実施形態では、図5に示すように、腹側帯部材31に設けられた全ての糸ゴム35,35…が、横方向の略全長に亘って連続して配されていたが、何等これに限らない。例えば、全ての糸ゴム35,35…のうちの幾つかの糸ゴム35が、例えば横方向の中央位置において非連続になっていても良い。なお、このことは、背側帯部材41の糸ゴム45,45…についても同様である。 In the above-described embodiment, as shown in FIG. 5, all the rubber threads 35, 35 ... Provided to the ventral band member 31 are continuously arranged over a substantially overall length in the lateral direction. Not limited to. For example, some of the rubber threads 35, 35 ... May be discontinuous at the center position in the lateral direction, for example. The same applies to the thread rubbers 45, 45 ... Of the dorsal band member 41.

上述の実施形態では、図3に示すように、吸収性物品の一例として3ピースタイプの使い捨ておむつ1を例示したが、何等これに限らない。例えば、2ピースタイプの使い捨ておむつに使用されるシート状部材に糸ゴム等の弾性部材を取り付ける際に、本発明の方法を用いても良い。ちなみに、2ピースタイプの使い捨ておむつとは、腹側部と股下部と背側部とを有した二層構造の外装シートを第1部品として有し、同外装シートの肌側面に固定される吸収性本体10を第2部品として有するタイプのおむつのことである。また、所謂テープ式の使い捨ておむつに使用されるシート状部材に糸ゴム等の弾性部材を取り付ける際に、本発明の方法を用いても良い。ちなみに、テープ式の使い捨ておむつとは、着用者の胴部を腹側から覆う腹側部と、同胴部を背側から覆う背側部とを有し、腹側部と背側部とを連結するのに、ファスニングテープを用いるタイプのおむつのことである。更に言えば、吸収性物品についても、何等上記の使い捨ておむつ1に限らない。すなわち、上述したような弾性部材が取り付けられたシート状部材を用いる吸収性物品であれば、本発明の方法を適用可能である。そのため、この吸収性物品の概念には、尿取りパッドや生理用ナプキンも含まれる。 In the above-described embodiment, as shown in FIG. 3, a 3-piece type disposable diaper 1 is illustrated as an example of the absorbent article, but the present invention is not limited to this. For example, the method of the present invention may be used when attaching an elastic member such as rubber thread to a sheet-shaped member used for a two-piece type disposable diaper. By the way, the two-piece type disposable diaper has a two-layered exterior sheet having a ventral side, an inseam and a back side as the first component, and is fixed to the skin side surface of the exterior sheet. This is a type of diaper that has a sex body 10 as a second component. Further, the method of the present invention may be used when attaching an elastic member such as rubber thread to a sheet-like member used for a so-called tape-type disposable diaper. By the way, the tape-type disposable diaper has a ventral portion that covers the wearer's torso from the ventral side and a dorsal portion that covers the same torso from the dorsal side. It is a type of diaper that uses a fastening tape to connect. Furthermore, the absorbent article is not limited to the above-mentioned disposable diaper 1. That is, the method of the present invention can be applied to an absorbent article using a sheet-like member to which an elastic member as described above is attached. Therefore, this concept of absorbent articles also includes urine absorbing pads and sanitary napkins.

上述の実施形態では、図6に示すように、接合部として平面視略正方形の溶着部jを例示したが、溶着部jの形状は何等これに限らない。例えば円形でも良いし、長方形や長円形状等の長手方向を有した形状でも良い。なお、後者の長手方向を有した形状の場合には、当該長手方向は、搬送方向(横方向)に沿っていても良いし、CD方向(縦方向)に沿っていても良いし、搬送方向及びCD方向の両者と交差する方向に沿っていても良い。 In the above-described embodiment, as shown in FIG. 6, the welded portion j having a substantially square plane view is illustrated as the joint portion, but the shape of the welded portion j is not limited to this. For example, it may be circular, or may have a shape having a longitudinal direction such as a rectangle or an oval shape. In the case of the latter shape having a longitudinal direction, the longitudinal direction may be along the transport direction (horizontal direction), along the CD direction (vertical direction), or in the transport direction. And may be along a direction intersecting both of the CD directions.

上述の実施形態では、図5に示すように、各溶着部j,j…は、横方向及び縦方向(長手方向)で規定される所謂格子状配置で設けられていた。すなわち、各溶着部j,j…は、横方向に沿った仮想直線と縦方向に沿った仮想直線との交点にそれぞれ設けられていたが、何等これに限らない。例えば、上記の交点から横方向のずれた位置に各溶着部j,j…が設けられることで、これら溶着部j,j…が所謂千鳥配置で設けられていても良い。また、同図5では、これら溶着部j,j…は、縦方向に沿って並んで配置されていたが、何等これに限らない。例えば、縦方向及び横方向の両者と交差する斜め方向に並んで配置されていても良い。 In the above-described embodiment, as shown in FIG. 5, the welded portions j, j ... Are provided in a so-called grid-like arrangement defined in the horizontal direction and the vertical direction (longitudinal direction). That is, the welded portions j, j ... Are provided at the intersections of the virtual straight line along the horizontal direction and the virtual straight line along the vertical direction, respectively, but the present invention is not limited to this. For example, by providing the welding portions j, j ... At positions laterally displaced from the above intersection, these welding portions j, j ... may be provided in a so-called staggered arrangement. Further, in FIG. 5, these welded portions j, j ... Are arranged side by side in the vertical direction, but the present invention is not limited to this. For example, they may be arranged side by side in an oblique direction intersecting both the vertical direction and the horizontal direction.

上述の実施形態では、図5に示すように、縦方向(CD方向)に隣り合う溶着部対jP,jP同士の間には、溶着部jが設けられていなかったが、何等これに限らない。例えば、これら溶着部対jP,jP同士の間に1つ以上の溶着部jを設けても良い。なお、かかる溶着部jは、糸ゴム35(45)の不織布32,33(42,43)への取り付けには寄与せず、不織布32,33(42,43)同士の接合にのみ寄与するものである。 In the above-described embodiment, as shown in FIG. 5, the welded portion j is not provided between the welded portions adjacent to each other in the vertical direction (CD direction) and the jPs and jPs, but the present invention is not limited to this. .. For example, one or more welded portions j may be provided between the welded portions and jP and jP. The welded portion j does not contribute to the attachment of the rubber thread 35 (45) to the non-woven fabrics 32, 33 (42, 43), but only to the bonding of the non-woven fabrics 32, 33 (42, 43). Is.

上述の実施形態では、図9Aの超音波溶着装置60のホーン61hは非回転であったが、何等これに限らない。例えば、CD方向に沿った回転軸回りに回転するローラー状のホーンを使用しても良い。なお、この場合には、ローラー状のホーンが、その回転半径方向に所定の周波数で膨張収縮を繰り返すことにより、同ホーンの外周面が、超音波振動する振動面として機能することになる。 In the above-described embodiment, the horn 61h of the ultrasonic welding device 60 of FIG. 9A is non-rotating, but the present invention is not limited to this. For example, a roller-shaped horn that rotates around a rotation axis along the CD direction may be used. In this case, the roller-shaped horn repeatedly expands and contracts at a predetermined frequency in the radial direction of its rotation, so that the outer peripheral surface of the horn functions as a vibration surface that ultrasonically vibrates.

上述の実施形態では、第5加工位置PK5の切断工程での切断に基づいて、搬送方向に収縮しつつCD方向に拡大しようとする糸ゴム35(45)を、両側の溶着部j,j同士でCD方向に挟圧し、これにより、当該糸ゴム35(45)を2枚の不織布32,33(42,43)に取り付けていたが、何等これに限らない。すなわち、切断工程よりも前の段階で2枚の不織布32,33(42,43)に係る連続シート32a,33a(42a,43a)の一対の対向面32ast,33ast(42ast,43ast)に介挿された糸ゴムの連続体35a(45a)の伸長状態を緩和して同連続体35a(45a)を搬送方向に収縮することにより、同連続体35a(45a)を両側の溶着部j,j同士でCD方向に挟圧して取り付けても良い。例えば、図7のパンツ型のおむつの連続体1sにおいて糸ゴムの連続体35a(45a)の伸長状態を緩和して同連続体35a(45a)を搬送方向に収縮することにより、同連続体35a(45a)を両側の溶着部j,j同士でCD方向に挟圧して取り付けても良い。そして、しかる後に切断工程でパンツ型のおむつの連続体1sを切断して、おむつ1を生成しても良い。 In the above-described embodiment, based on the cutting in the cutting step of the fifth processing position PK5, the thread rubber 35 (45) that tries to expand in the CD direction while contracting in the transport direction is formed between the welded portions j and j on both sides. The rubber thread 35 (45) was attached to the two non-woven fabrics 32, 33 (42, 43) by sandwiching the rubber thread 35 (45) in the CD direction, but the present invention is not limited to this. That is, it is inserted into the pair of facing surfaces 32ast, 33ast (42ast, 43ast) of the continuous sheets 32a, 33a (42a, 43a) pertaining to the two non-woven fabrics 32, 33 (42, 43) in the stage prior to the cutting step. By relaxing the stretched state of the continuous body 35a (45a) of the rubber thread and contracting the continuous body 35a (45a) in the transport direction, the continuous body 35a (45a) is welded to each other on both sides. It may be attached by sandwiching it in the CD direction. For example, in the pants-type diaper continuum 1s of FIG. 7, the stretched state of the thread rubber continuum 35a (45a) is relaxed and the continuum 35a (45a) is contracted in the transport direction, whereby the continuum 35a (45a) is contracted. (45a) may be attached by sandwiching the welded portions j and j on both sides in the CD direction. Then, after that, the pants-shaped diaper continuum 1s may be cut in the cutting step to generate the diaper 1.

1 使い捨ておむつ(吸収性物品)、
1hs 略梯子状のおむつの連続体、
1hsb 2つ折り状態のおむつの連続体、
1s パンツ型のおむつの連続体、
10 吸収性本体、10ea 端部、10eb 端部、
11 吸収体、11c 吸収性コア、
13 トップシート、15 バックシート、
17 糸ゴム(弾性部材)、18 糸ゴム(弾性部材)、
31 腹側帯部材、31e 端部、
32 不織布、32a 第1連続シート、
32ast 対向面、
33 不織布、33a 第2連続シート、
33ast 対向面、
35 糸ゴム(弾性部材)、35a 糸ゴムの連続体(弾性部材の連続体)、
35aes 先端部、35aee 尾端部、
35ak 起立状部分、35ay 横たわり状部分、
35ayL 長尺横たわり状部分、35ayS 短尺横たわり状部分、
35an 捻れ状部分、
35a1 第1糸ゴムの連続体(第1弾性部材の連続体)、
35a2 第2糸ゴムの連続体(第2弾性部材の連続体)、
35aC 資材コイル、35aCs 紙管、
41 背側帯部材、41e 端部、
42 不織布、42a 連続シート、42ast 対向面、
43 不織布、43a 連続シート、43ast 対向面、
45 糸ゴム(弾性部材)、45a 糸ゴムの連続体(弾性部材の連続体)、
j 溶着部(接合部)、jP 溶着部対、
51 搬送機構、51R 搬送ローラー、
52 搬送機構、52R 搬送ローラー、
53 搬送機構、53R リング状案内部材、53Rh 貫通孔、
53TC テンションコントローラー、
53TCR ローラー、53TCS テンションセンサー、
53UW 繰り出し装置、53s 支持軸、
54 伸長装置、54D 下流側ニップロール機構(配置装置)、
54U 上流側ニップロール機構、
54Ru ニップロール、54Rd ニップロール、
60 超音波溶着装置(接合部形成装置)、61a アンビルロール、
61a アンビルロール(ロール)、61as 外周面、61at 凸部、
61h ホーン、61hs 振動面、61s 支持部材、
BH 胴回り開口、LH 脚回り開口、
LG レッグギャザー、LSG 立体ギャザー、
j 溶着部(接合部)、jP 溶着部対、
SS サイドシール部、SSk 溶着部、
SPD スパンデックス、
CL1 中央位置(所定位置)、
PC 切断対象位置、PBL 境界位置、
P61h 配置位置、
PK1 第1加工位置、PK2 第2加工位置、PK3 第3加工位置、
PK4 第4加工位置、PK5 第5加工位置、
PTO 繰り出し位置、
1 Disposable diapers (absorbent articles),
1hs Approximately ladder-shaped diaper continuum,
1hsb Folded diaper continuum,
1s pants-type diaper continuum,
10 Absorbent body, 10ea end, 10eb end,
11 absorber, 11c absorbent core,
13 top sheet, 15 back sheet,
17 thread rubber (elastic member), 18 thread rubber (elastic member),
31 ventral band member, 31e end,
32 non-woven fabric, 32a first continuous sheet,
32ast facing surface,
33 non-woven fabric, 33a second continuous sheet,
33ast facing surface,
35 thread rubber (elastic member), 35a thread rubber continuum (elastic member continuum),
35aes tip, 35aee tail,
35ak upright part, 35ay lying part,
35ayL long lying part, 35ayS short lying part,
35an twisted part,
35a1 First thread rubber continuum (first elastic member continuum),
35a2 Second thread rubber continuum (second elastic member continuum),
35aC material coil, 35aCs paper tube,
41 Dorsal band member, 41e end,
42 non-woven fabric, 42a continuous sheet, 42ast facing surface,
43 non-woven fabric, 43a continuous sheet, 43ast facing surface,
45 thread rubber (elastic member), 45a thread rubber continuum (elastic member continuum),
j Welding part (joint), jP Welding part pair,
51 transport mechanism, 51R transport roller,
52 transport mechanism, 52R transport roller,
53 transport mechanism, 53R ring-shaped guide member, 53Rh through hole,
53TC tension controller,
53TCR roller, 53TCS tension sensor,
53UW feeding device, 53s support shaft,
54 extension device, 54D downstream nip roll mechanism (arrangement device),
54U upstream nip roll mechanism,
54Ru Nip Roll, 54Rd Nip Roll,
60 Ultrasonic welding device (joint forming device), 61a anvil roll,
61a anvil roll (roll), 61as outer peripheral surface, 61at convex part,
61h horn, 61hs vibrating surface, 61s support member,
BH waist opening, LH leg opening,
LG leg gathers, LG three-dimensional gathers,
j Welding part (joint), jP Welding part pair,
SS side seal part, SSK welded part,
SPD spandex,
CL1 center position (predetermined position),
PC disconnection target position, PBL boundary position,
P61h placement position,
PK1 1st machining position, PK2 2nd machining position, PK3 3rd machining position,
PK4 4th processing position, PK5 5th processing position,
PTO feeding position,

Claims (7)

搬送方向に連続するシート状部材の連続体の互いに対向する一対の対向面同士の間に、前記搬送方向に連続する弾性部材の連続体を介挿した後に、前記シート状部材の連続体を、当該シート状部材の連続体における前記搬送方向の切断対象位置で切断することにより、前記弾性部材が取り付けられた前記シート状部材を製造する方法であって、
前記弾性部材の連続体が軸回りに巻かれてなる非回転の資材コイルから、前記弾性部材の連続体を、前記資材コイルの軸方向に引っ張ることにより、前記弾性部材の連続体を前記搬送方向に繰り出す繰り出し工程と、
前記一対の対向面同士の間に、繰り出された前記弾性部材の連続体を前記搬送方向に伸長した状態で配置する配置工程と、
前記一対の対向面同士を接合する接合部を前記搬送方向に間隔をあけて複数形成する接合部形成工程と、
前記配置工程及び前記接合部形成工程の後で、前記シート状部材の連続体及び前記弾性部材の連続体を、前記切断対象位置で切断することにより、前記シート状部材及び前記弾性部材を生成する切断工程と、を有し、
前記弾性部材の連続体において前記搬送方向と直交する断面での形状は、長手方向と、前記長手方向と交差する方向に前記長手方向よりも長さの短い短手方向と、を有した形状であり、
前記弾性部材の連続体において前記一対の対向面のうちの一方の対向面に対して前記長手方向がなす角度が45°以上の部分を起立状部分とし、前記一方の対向面に対して前記長手方向がなす角度が45°未満の部分を横たわり状部分とした場合に、
前記配置工程では、前記搬送方向の単位長さにおいて前記起立状部分が占める前記搬送方向の長さよりも前記横たわり状部分が占める前記搬送方向の長さの方が長くなるように前記弾性部材の連続体の姿勢を変更しながら、前記一方の対向面に前記弾性部材の連続体を当接し、
前記接合部形成工程では、前記弾性部材の連続体を前記搬送方向に伸長した状態に維持するとともに、前記配置工程で変更後の姿勢に維持しつつ、前記接合部を、前記搬送方向と交差するCD方向において前記弾性部材の連続体の両側の位置にそれぞれ形成し、
前記切断工程の後では、前記搬送方向に収縮しつつ前記CD方向に拡大した前記弾性部材は、前記両側の前記接合部同士で前記CD方向に挟圧されて前記シート状部材に取り付けられていることを特徴とする吸収性物品に係るシート状部材の製造方法。
After inserting the continuous body of the elastic members continuous in the transport direction between the pair of facing surfaces of the continuous body of the sheet-shaped members continuous in the transport direction, the continuous body of the sheet-like members is inserted. A method of manufacturing the sheet-like member to which the elastic member is attached by cutting at a cutting target position in the transport direction in the continuum of the sheet-like member.
By pulling the continuous body of the elastic member in the axial direction of the material coil from the non-rotating material coil in which the continuous body of the elastic member is wound around the axis, the continuous body of the elastic member is moved in the transport direction. The feeding process and the feeding process
An arrangement step of arranging a continuous body of the elastic members drawn out between the pair of facing surfaces in a state of being extended in the transport direction.
A joint portion forming step of forming a plurality of joint portions for joining the pair of facing surfaces at intervals in the transport direction.
After the arrangement step and the joint forming step, the sheet-shaped member and the elastic member are generated by cutting the continuous body of the sheet-shaped member and the continuous body of the elastic member at the cutting target position. With a cutting process,
The shape of the continuous body of the elastic member in the cross section orthogonal to the transport direction is a shape having a longitudinal direction and a lateral direction having a length shorter than the longitudinal direction in a direction intersecting the longitudinal direction. Yes,
In the continuum of the elastic members, a portion where the angle formed by the longitudinal direction with respect to one of the pair of facing surfaces is 45 ° or more is defined as an upright portion, and the longitudinal portion with respect to the one facing surface. When the part where the angle formed by the direction is less than 45 ° is regarded as the lying part,
In the arrangement step, the elastic member is continuous so that the length in the transport direction occupied by the lying portion is longer than the length in the transport direction occupied by the upright portion in the unit length in the transport direction. While changing the posture of the body, the continuous body of the elastic member is brought into contact with the one facing surface.
In the joint forming step, the continuous body of the elastic members is maintained in a state of being extended in the transport direction, and the joint is intersected with the transport direction while maintaining the posture changed in the arrangement step. Formed at positions on both sides of the continuum of the elastic members in the CD direction, respectively.
After the cutting step, the elastic member that contracts in the transport direction and expands in the CD direction is sandwiched between the joints on both sides in the CD direction and attached to the sheet-like member. A method for manufacturing a sheet-like member according to an absorbent article.
請求項1に記載の吸収性物品に係るシート状部材の製造方法であって、
前記シート状部材の連続体は、前記搬送方向に連続する第1連続シートと、前記搬送方向に連続する第2連続シートと、を有し、
前記一対の対向面として、前記第1連続シートの一方の面と前記第2連続シートの一方の面とが対向しており、
前記配置工程では、前記搬送方向に沿って回転するロールの外周面に前記第1連続シートが巻き付けられて搬送されているとともに、前記第1連続シートが巻き付いている範囲において前記弾性部材の連続体が前記第1連続シートの前記一方の面に当接することにより、前記弾性部材の連続体も前記ロールの前記外周面に巻き付けられて搬送されており、
前記配置工程では、前記搬送方向に沿って回転するロールの外周面に前記第1連続シートが巻き付けられて搬送されているとともに、前記第1連続シートを介して前記弾性部材の連続体が前記ロールの外周面に巻き付けられて搬送されることにより、前記弾性部材の連続体の前記姿勢が変更されることを特徴とする吸収性物品に係るシート状部材の製造方法。
The method for manufacturing a sheet-like member according to an absorbent article according to claim 1.
The continuous body of the sheet-shaped members includes a first continuous sheet continuous in the transport direction and a second continuous sheet continuous in the transport direction.
As the pair of facing surfaces, one surface of the first continuous sheet and one surface of the second continuous sheet face each other.
In the arrangement step, the first continuous sheet is wound around the outer peripheral surface of the roll that rotates along the transport direction and is conveyed, and the continuous body of the elastic member is in the range in which the first continuous sheet is wound. Is in contact with the one surface of the first continuous sheet, so that the continuous body of the elastic member is also wound around the outer peripheral surface of the roll and conveyed.
In the arrangement step, the first continuous sheet is wound around the outer peripheral surface of the roll that rotates along the transport direction and is conveyed, and the continuous body of the elastic member is conveyed through the first continuous sheet. A method for manufacturing a sheet-like member according to an absorbent article, wherein the posture of a continuum of elastic members is changed by being wound around the outer peripheral surface of the elastic member and conveyed.
請求項1又は2に記載の吸収性物品に係るシート状部材の製造方法であって、
前記配置工程では、前記弾性部材の連続体は、前記CD方向に間隔をあけて複数本並んで配置され、
前記横たわり状部分は、前記搬送方向の長さが所定長さ以上の長尺横たわり状部分と、前記搬送方向の長さが前記所定長さ未満の短尺横たわり状部分と、を有し、
前記搬送方向に隣り合う前記長尺横たわり状部分同士の間に、前記搬送方向に沿った軸回りに前記弾性部材の連続体が複数回捻れてなる捻れ状部分が形成されるように、前記弾性部材の連続体の前記姿勢は変更されるとともに、前記捻れ状部分は、前記起立状部分と前記短尺横たわり状部分とが前記搬送方向に交互に複数並んだものであり、
前記複数本の弾性部材の連続体のうちの1つの弾性部材の連続体を第1弾性部材の連続体とし、他の1つの弾性部材の連続体を第2弾性部材の連続体とした場合に、
前記第1弾性部材の連続体が有する複数の前記捻れ状部分のうちの少なくとも1つの捻れ状部分と、前記第2弾性部材の連続体が有する複数の前記捻れ状部分のうちで前記第1弾性部材の連続体の前記捻れ状部分に最も近い捻れ状部分とが、前記搬送方向にオーバーラップしないように前記第1弾性部材の連続体の前記姿勢と前記第2弾性部材の連続体の前記姿勢とが変更されることを特徴とする吸収性物品に係るシート状部材の製造方法。
A method for manufacturing a sheet-like member according to an absorbent article according to claim 1 or 2.
In the arrangement step, a plurality of the continuous bodies of the elastic members are arranged side by side at intervals in the CD direction.
The horizontal portion has a long horizontal portion having a length in the transport direction of a predetermined length or more and a short horizontal portion having a length in the transport direction of less than the predetermined length.
The elasticity is formed between the long lying portions adjacent to each other in the conveying direction so that a twisted portion formed by twisting the continuum of the elastic members a plurality of times around the axis along the conveying direction is formed. The posture of the continuum of members is changed, and the twisted portion is formed by arranging a plurality of the standing portion and the short lying portion alternately in the transport direction.
When one of the continuums of the plurality of elastic members is the continuum of the first elastic member and the other continuum of the elastic members is the continuum of the second elastic member. ,
The first elasticity among the at least one twisted portion of the plurality of twisted portions of the continuum of the first elastic member and the plurality of twisted portions of the continuum of the second elastic member. The posture of the continuum of the first elastic member and the posture of the continuum of the second elastic member so that the twisted portion closest to the twisted portion of the continuum of the members does not overlap in the transport direction. A method for manufacturing a sheet-like member according to an absorbent article, which is characterized in that
請求項1乃至3の何れかに記載の吸収性物品に係るシート状部材の製造方法であって、
前記配置工程では、前記弾性部材の連続体は、前記CD方向に間隔をあけて複数本並んで配置され、
前記横たわり状部分は、前記搬送方向の長さが所定長さ以上の長尺横たわり状部分と、前記搬送方向の長さが前記所定長さ未満の短尺横たわり状部分と、を有し、
前記搬送方向に隣り合う前記長尺横たわり状部分同士の間に、前記搬送方向に沿った軸回りに前記弾性部材の連続体が複数回捻れてなる捻れ状部分が形成されるように、前記弾性部材の連続体の前記姿勢は変更されるとともに、前記捻れ状部分は、前記起立状部分と前記短尺横たわり状部分とが前記搬送方向に交互に複数並んだものであり、
前記複数の弾性部材の連続体のうちの1つの弾性部材の連続体を第1弾性部材の連続体とし、他の1つの弾性部材の連続体を第2弾性部材の連続体とした場合に、
前記第1弾性部材の連続体が有する複数の前記捻れ状部分のうちの少なくとも1つの捻れ状部分が、前記第2弾性部材の連続体が有する前記長尺横たわり状部分に前記搬送方向の位置に関して含まれるように、前記第1弾性部材の連続体の前記姿勢と前記第2弾性部材の連続体の前記姿勢とが変更されることを特徴とする吸収性物品に係るシート状部材の製造方法。
A method for manufacturing a sheet-like member according to an absorbent article according to any one of claims 1 to 3.
In the arrangement step, a plurality of the continuous bodies of the elastic members are arranged side by side at intervals in the CD direction.
The horizontal portion has a long horizontal portion having a length in the transport direction of a predetermined length or more and a short horizontal portion having a length in the transport direction of less than the predetermined length.
The elasticity is formed between the long lying portions adjacent to each other in the conveying direction so that a twisted portion formed by twisting the continuum of the elastic members a plurality of times around the axis along the conveying direction is formed. The posture of the continuum of members is changed, and the twisted portion is formed by arranging a plurality of the standing portion and the short lying portion alternately in the transport direction.
When one of the continuums of the plurality of elastic members is the continuum of the first elastic member and the other continuum of the elastic members is the continuum of the second elastic member,
At least one twisted portion of the plurality of twisted portions of the continuum of the first elastic member is positioned in the transport direction with respect to the long lying portion of the continuum of the second elastic member. A method for manufacturing a sheet-like member according to an absorbent article, wherein the posture of the continuum of the first elastic member and the posture of the continuum of the second elastic member are changed so as to be included.
請求項1乃至4の何れかに記載の吸収性物品に係るシート状部材の製造方法であって、
前記配置工程では、前記弾性部材の連続体は、前記CD方向に間隔をあけて複数本並んで配置され、
前記横たわり状部分は、前記搬送方向の長さが所定長さ以上の長尺横たわり状部分と、前記搬送方向の長さが前記所定長さ未満の短尺横たわり状部分と、を有し、
前記搬送方向に隣り合う前記長尺横たわり状部分同士の間に、前記搬送方向に沿った軸回りに前記弾性部材の連続体が複数回捻れてなる捻れ状部分が形成されるように、前記弾性部材の連続体の前記姿勢は変更されるとともに、前記捻れ状部分は、前記起立状部分と前記短尺横たわり状部分とが前記搬送方向に交互に複数並んだものであり、
前記接合部は、少なくとも前記切断対象位置を含む前記搬送方向の所定範囲において前記搬送方向に所定の形成ピッチで形成され、
前記捻れ状部分の前記搬送方向の長さが、前記接合部の前記形成ピッチより大きいことを特徴とする吸収性物品に係るシート状部材の製造方法。
A method for manufacturing a sheet-like member according to an absorbent article according to any one of claims 1 to 4.
In the arrangement step, a plurality of the continuous bodies of the elastic members are arranged side by side at intervals in the CD direction.
The horizontal portion has a long horizontal portion having a length in the transport direction of a predetermined length or more and a short horizontal portion having a length in the transport direction of less than the predetermined length.
The elasticity is formed between the long lying portions adjacent to each other in the conveying direction so that a twisted portion formed by twisting the continuum of the elastic members a plurality of times around the axis along the conveying direction is formed. The posture of the continuum of members is changed, and the twisted portion is formed by arranging a plurality of the standing portion and the short lying portion alternately in the transport direction.
The joint is formed at a predetermined formation pitch in the transport direction in a predetermined range in the transport direction including at least the position to be cut.
A method for manufacturing a sheet-like member according to an absorbent article, wherein the length of the twisted portion in the transport direction is larger than the forming pitch of the joint portion.
請求項1又は2に記載の吸収性物品に係るシート状部材の製造方法であって、
前記配置工程では、前記弾性部材の連続体は、前記CD方向に間隔をあけて複数本並んで配置され、
前記横たわり状部分は、前記搬送方向の長さが所定長さ以上の長尺横たわり状部分と、前記搬送方向の長さが前記所定長さ未満の短尺横たわり状部分と、を有し、
前記搬送方向に隣り合う前記長尺横たわり状部分同士の間に、前記搬送方向に沿った軸回りに前記弾性部材の連続体が複数回捻れてなる捻れ状部分が形成されるように、前記弾性部材の連続体の前記姿勢は変更されるとともに、前記捻れ状部分は、前記起立状部分と前記短尺横たわり状部分とが前記搬送方向に交互に複数並んだものであり、
前記吸収性物品は、前記弾性部材が取り付けられて横方向の伸縮性が付与された前記シート状部材と第2シート状部材とを、前記横方向と交差する厚さ方向に重ね合わせた状態で溶着するサイドシール部を、前記横方向の各端部にそれぞれ有し、
前記搬送方向は、前記横方向に沿っており、
前記接合部が形成された前記シート状部材の連続体に、前記搬送方向に連続する前記第2シート状部材の連続体を前記厚さ方向に重ね合わせる重ね合わせ工程と、
前記厚さ方向に重ね合わせられた前記シート状部材の連続体と前記第2シート状部材の連続体とを溶着する前記サイドシール部を、前記搬送方向に所定ピッチで設定された前記切断対象位置の両側にそれぞれ形成するサイドシール部形成工程と、を有し、
前記厚さ方向から見た場合に、前記複数本の弾性部材の連続体のうちの少なくとも1つの弾性部材の連続体に係る前記捻れ状部分に対して前記接合部が設けられるとともに、前記捻れ状部分を前記CD方向に跨ぐように前記サイドシール部が設けられることを特徴とする吸収性物品に係るシート状部材の製造方法。
A method for manufacturing a sheet-like member according to an absorbent article according to claim 1 or 2.
In the arrangement step, a plurality of the continuous bodies of the elastic members are arranged side by side at intervals in the CD direction.
The horizontal portion has a long horizontal portion having a length in the transport direction of a predetermined length or more and a short horizontal portion having a length in the transport direction of less than the predetermined length.
The elasticity is formed between the long lying portions adjacent to each other in the conveying direction so that a twisted portion formed by twisting the continuum of the elastic members a plurality of times around the axis along the conveying direction is formed. The posture of the continuum of members is changed, and the twisted portion is formed by arranging a plurality of the standing portion and the short lying portion alternately in the transport direction.
The absorbent article is in a state in which the sheet-like member to which the elastic member is attached and the elasticity in the lateral direction is imparted and the second sheet-like member are overlapped in a thickness direction intersecting the lateral direction. A side seal portion to be welded is provided at each end portion in the lateral direction.
The transport direction is along the lateral direction,
A stacking step of superimposing the continuous body of the second sheet-shaped member continuous in the transport direction on the continuous body of the sheet-shaped member on which the joint portion is formed in the thickness direction.
The side seal portion for welding the continuous body of the sheet-shaped members and the continuous body of the second sheet-shaped members superposed in the thickness direction is set at a predetermined pitch in the transport direction. It has a side seal part forming step, which is formed on both sides of the above.
When viewed from the thickness direction, the joint portion is provided with respect to the twisted portion of the continuum of at least one elastic member among the continuums of the plurality of elastic members, and the twisted shape is provided. A method for manufacturing a sheet-like member according to an absorbent article, wherein the side seal portion is provided so as to straddle the portion in the CD direction.
搬送方向に連続するシート状部材の連続体の互いに対向する一対の対向面同士の間に、前記搬送方向に連続する弾性部材の連続体を介挿した後に、前記シート状部材の連続体を、当該シート状部材の連続体における前記搬送方向の切断対象位置で切断することにより、前記弾性部材が取り付けられた前記シート状部材を製造する装置であって、
前記弾性部材の連続体が軸回りに巻かれてなる非回転の資材コイルから、前記弾性部材の連続体が、前記資材コイルの軸方向に引っ張られることにより、前記弾性部材の連続体を前記搬送方向に繰り出す繰り出し装置と、
前記一対の対向面同士の間に、繰り出された前記弾性部材の連続体を前記搬送方向に伸長した状態で配置する配置装置と、
前記一対の対向面同士を接合する接合部を前記搬送方向に間隔をあけて複数形成する接合部形成装置と、
前記配置装置及び前記接合部形成装置よりも前記搬送方向の下流側の位置で、前記シート状部材の連続体及び前記弾性部材の連続体を、前記切断対象位置で切断することにより、前記シート状部材及び前記弾性部材を生成する切断装置と、を有し、
前記弾性部材の連続体において前記搬送方向と直交する断面での形状は、長手方向と、前記長手方向と交差する方向に前記長手方向よりも長さの短い短手方向と、を有し、
前記弾性部材の連続体において前記一対の対向面のうちの一方の対向面に対して前記長手方向がなす角度が45°以上の部分を起立状部分とし、前記一方の対向面に対して前記長手方向がなす角度が45°未満の部分を横たわり状部分とした場合に、
前記配置装置は、前記搬送方向の単位長さにおいて前記起立状部分が占める前記搬送方向の長さよりも前記横たわり状部分が占める前記搬送方向の長さの方が長くなるように前記弾性部材の連続体の姿勢を変更しながら、前記一方の対向面に前記弾性部材の連続体を載置し、
前記接合部形成装置は、前記弾性部材の連続体を前記搬送方向に伸長した状態に維持するとともに、前記配置工程で変更後の姿勢に維持しつつ、前記接合部を、前記搬送方向と交差するCD方向において前記弾性部材の連続体の両側の位置にそれぞれ形成し、
前記切断工程よりも前記搬送方向の下流側では、前記搬送方向に収縮しつつ前記CD方向に拡大した前記弾性部材は、前記両側の前記接合部同士で前記CD方向に挟圧されて前記シート状部材に取り付けられていることを特徴とする吸収性物品に係るシート状部材の製造装置。
After inserting the continuous body of the elastic members continuous in the transport direction between the pair of facing surfaces of the continuous body of the sheet-shaped members continuous in the transport direction, the continuous body of the sheet-like members is inserted. An apparatus for manufacturing the sheet-shaped member to which the elastic member is attached by cutting at a cutting target position in the transport direction in the continuum of the sheet-shaped member.
The continuous body of the elastic member is conveyed by pulling the continuous body of the elastic member in the axial direction from the non-rotating material coil formed by winding the continuous body of the elastic member around the axis. A feeding device that feeds in the direction and
An arrangement device for arranging a continuous body of the elastic members drawn out between the pair of facing surfaces in a state of being extended in the transport direction.
A joint portion forming device for forming a plurality of joint portions for joining the pair of facing surfaces at intervals in the transport direction.
By cutting the continuum of the sheet-like member and the continuum of the elastic member at the position downstream of the arrangement device and the joint forming device in the transport direction, the sheet-like member is formed. It has a member and a cutting device that produces the elastic member.
The shape of the continuous body of the elastic member in a cross section orthogonal to the transport direction has a longitudinal direction and a lateral direction having a length shorter than the longitudinal direction in a direction intersecting the longitudinal direction.
In the continuum of the elastic members, a portion where the angle formed by the longitudinal direction with respect to one of the pair of facing surfaces is 45 ° or more is defined as an upright portion, and the longitudinal portion with respect to the one facing surface. When the part where the angle formed by the direction is less than 45 ° is regarded as the lying part,
The arrangement device is a continuum of the elastic members so that the length in the transport direction occupied by the lying portion is longer than the length in the transport direction occupied by the upright portion in the unit length in the transport direction. While changing the posture of the body, the continuous body of the elastic member is placed on the one facing surface.
The joint forming device intersects the joint with the transport direction while maintaining the continuous body of the elastic members in a state of being extended in the transport direction and maintaining the posture changed in the arrangement step. Formed at positions on both sides of the continuum of the elastic members in the CD direction, respectively.
On the downstream side in the transport direction from the cutting step, the elastic member that contracts in the transport direction and expands in the CD direction is sandwiched between the joints on both sides in the CD direction to form the sheet. An apparatus for manufacturing a sheet-shaped member according to an absorbent article, which is attached to the member.
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