WO2014034520A1 - Stretch layered body fabrication method and device - Google Patents

Stretch layered body fabrication method and device Download PDF

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Publication number
WO2014034520A1
WO2014034520A1 PCT/JP2013/072416 JP2013072416W WO2014034520A1 WO 2014034520 A1 WO2014034520 A1 WO 2014034520A1 JP 2013072416 W JP2013072416 W JP 2013072416W WO 2014034520 A1 WO2014034520 A1 WO 2014034520A1
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WIPO (PCT)
Prior art keywords
conveyor belts
sheet
elastic member
nip
conveyor
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PCT/JP2013/072416
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French (fr)
Japanese (ja)
Inventor
淳也 阪部
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株式会社瑞光
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Application filed by 株式会社瑞光 filed Critical 株式会社瑞光
Priority to CN201380043301.6A priority Critical patent/CN104582649B/en
Priority to JP2014532966A priority patent/JP6180418B2/en
Publication of WO2014034520A1 publication Critical patent/WO2014034520A1/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS 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
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15585—Apparatus or processes for manufacturing of babies' napkins, e.g. diapers
    • A61F13/15593—Apparatus or processes for manufacturing of babies' napkins, e.g. diapers having elastic ribbons fixed thereto; Devices for applying the ribbons

Definitions

  • the present invention relates to a method and apparatus for producing a stretch laminate.
  • Disposable diapers and pants employ a structure in which stretchable laminates are arranged on the side panels and the main body so that the diapers and the like fit the trunk.
  • a spiral elastic member is fed by a conveyor belt between a pair of tapes sandwiched between nip rolls in a direction crossing the tape transport direction, and the elastic member is interposed between the pair of tapes.
  • a method of sandwiching and fixing between the two is known (Patent Document 1).
  • the nip position in the thickness direction of the tape may be shifted from the center of the upper and lower sides of the conveyor.
  • the distance by which the elastic member is conveyed to the nip position is different between the elastic member in contact with the conveying surface on the upper side of the conveyor belt and the elastic member in contact with the conveying surface on the lower side of the conveyor belt.
  • the conveyance distance of the upper elastic member is a linear distance from the winding start position to the nip position.
  • the conveyance distance of the elastic member below the conveyor belt is a value obtained by adding the arc-shaped conveyance distance along the lower nip roll to the linear distance from the winding start position to the contact position with the lower nip roll. For this reason, the time required for the lower elastic member to reach the nip position with respect to the upper elastic member is delayed by the length of the conveying portion on the arc. As a result, the desired arrangement of the elastic members cannot be obtained.
  • an object of the present invention is to make the conveying times of the elastic members conveyed by the two conveying surfaces of the conveyor belt approach the same value.
  • the method of the present invention is a method for producing a stretchable laminate in which at least one linear elastic member extending in the width direction crossing the conveying direction of the sheet is disposed on at least one sheet, and expands and contracts in the width direction.
  • the first set of conveyor belts includes a first conveyor belt disposed on the first nip roll side,
  • the second set of conveyor belts includes a third conveyor belt disposed on the first nip roll side,
  • the first set of conveyor belts includes a second conveyor belt disposed on the second nip roll side,
  • the second set of conveyor belts includes a fourth conveyor belt disposed on the second ni
  • the second and fourth conveyor belts when the nip position is closer to the second and fourth conveyor belts than the first and third conveyor belts, the second and fourth conveyor belts have an average circumferential speed V13 of the first and third conveyor belts. It is operated with the average peripheral speed V24 being smaller, On the other hand, when the nip position is closer to the first and third conveyor belts than the second and fourth conveyor belts, the second and fourth conveyor belts have an average circumferential speed V13 of the first and third conveyor belts. The vehicle is operated with the average peripheral speed V24 being larger.
  • the apparatus is an apparatus for manufacturing a stretchable laminate in which at least one linear elastic member extending in the width direction crossing the sheet conveyance direction is disposed on at least one sheet, and expands and contracts in the width direction.
  • a first set and a second set of conveyor belts spaced apart from each other in the width direction;
  • a spinner for spirally winding the elastic member in a stretched state on the two sets of conveyor belts;
  • a driving device for rotating the two sets of conveyor belts to convey the elastic member in the stretched state toward the downstream in the conveying direction of the conveyor belt;
  • First and second nip rolls that form the stretchable laminate by attaching the elastic member conveyed by the two sets of conveyor belts to the sheet;
  • the first set of conveyor belts includes a first conveyor belt disposed on the first nip roll side,
  • the second set of conveyor belts includes a third conveyor belt disposed on the first nip roll side,
  • the first set of conveyor belts includes a second conveyor belt disposed on the second nip
  • the control device When the nip position is closer to the second and fourth conveyor belts than the first and third conveyor belts, the average circumference of the second and fourth conveyor belts is greater than the average circumferential speed V13 of the first and third conveyor belts. Set the peripheral speed so that the speed V24 is operated in a smaller state, On the other hand, when the nip position is closer to the first and third conveyor belts than the second and fourth conveyor belts, the second and fourth conveyor belts have an average circumferential speed V13 of the first and third conveyor belts. The peripheral speed is set so that the average peripheral speed V24 is operated in a larger state.
  • the average peripheral speed of the conveyor belt on the short conveyance distance side is small, while the average peripheral speed of the conveyor belt on the long conveyance distance side is large. Therefore, even when the nip position is deviated in the sheet thickness direction and the conveyance distance is different for each portion of the elastic member, the time for which the elastic member is conveyed from the winding start position to the nip position tends to be uniform.
  • a part of at least one elastic member and another part includes a part and another part when there is one elastic member, and one elastic member when there are a plurality of elastic members. And another elastic member.
  • a state in which at least one elastic member extends in the width direction across the sheet includes a state in which the elastic member extends in a direction orthogonal to the conveyance direction, and the elastic member is in the conveyance direction. It means to include a state extending in an oblique direction with respect to the direction.
  • FIG. 1 is a schematic perspective view showing a manufacturing apparatus according to the present invention.
  • FIG. 2 is a schematic perspective view showing an upstream portion of the apparatus.
  • FIG. 3 is a side view of a spinner which is a part of the apparatus.
  • FIG. 4 is a schematic perspective view showing a downstream portion of the conveyor of the apparatus.
  • FIG. 5 is a schematic plan view showing an upstream portion of the apparatus.
  • 6A is a conceptual side view showing the apparatus
  • FIG. 6B is an enlarged side view of the stretchable laminate.
  • FIG. 7 is a side view showing a case where the nip position is shifted downward with respect to the conveyor belt.
  • FIG. 8 is a side view showing a case where the nip position is displaced upward with respect to the conveyor belt.
  • FIG. 1 shows an apparatus for manufacturing the stretch laminate W.
  • a linear elastic member F extending in the width direction Y across the transport direction X of the sheet S is sandwiched between the pair of sheets S, S and stretches in the width direction Y.
  • the said elastic laminated body W becomes a side panel of a disposable diaper or pants by being cut
  • the sheet S may be a continuous web continuous in the transport direction X, or a discontinuous web or resin sheet in the transport direction X.
  • the elastic member F is a so-called thread rubber, but may be a belt-like rubber.
  • the manufacturing apparatus includes a spinner 2, a conveyor 1, a cutter C, a pair of first and second nip rolls 41 and 42, and the like.
  • the conveyor 1 includes, for example, four first to fourth conveyor belts 11 to 14 and a driving device 3.
  • the first and second conveyor belts 11 and 12 are arranged close to each other in the vertical direction.
  • the third and fourth conveyor belts 13 and 14 are arranged close to each other in the vertical direction.
  • the first and second conveyor belts 11 and 12 (first set of conveyor belts 1A) and the third and fourth conveyor belts 13 and 14 (second set of conveyor belts 1B) are arranged in the width direction Y of the nip rolls 41 and 42. They are spaced apart from each other.
  • the first set and the second set of conveyor belts 1A and 1B respectively include first and third conveyor belts 11 and 13 disposed on the upper first nip roll 41 side, respectively.
  • the first set and the second set of conveyor belts 1A and 1B respectively include second and fourth conveyor belts 12 and 14 disposed on the lower second nip roll 42 side.
  • the first set of conveyor belts 1A includes the first conveyor belt 11 disposed on the first nip roll 41 side and the second conveyor belt 12 disposed on the second nip roll 42 side.
  • the second set of conveyor belts 1B includes a third conveyor belt 13 disposed on the first nip roll 41 side and a fourth conveyor belt 14 disposed on the second nip roll 42 side.
  • the spinner 2 spirally winds the elastic member F in a stretched state on the two sets of conveyor belts 1A and 1B being driven.
  • the spinner 2 includes a guide pulley 22 in which a cup-shaped main body 20 rotates around a hollow shaft 21 in FIG. 3 and an elastic member F inserted through the hollow shaft 21 is disposed in the main body 20. It is fed out from the tip.
  • the elastic member F is continuously wound spirally around the two sets of conveyor belts 1A and 1B in a state where tension is applied to the elastic member F, that is, in a state where the elastic member F is extended.
  • the driving device 3 rotates the four conveyor belts 11 to 14 in order to convey the stretched elastic member F toward the downstream in the conveying direction X of the conveyor belts 11 to 14. Is for.
  • the elastic member F contacts the upper and lower surfaces of the conveyor belts 11-14.
  • the conveyor belts 11 to 14 in FIG. 2 are configured so that the first part F1 of the elastic member F and the second part F2 of the elastic member F are separated from each other in the thickness direction Z of the sheet S.
  • the elastic member F is supplied between the sheets S and S and the pair of nip rolls 41 and 42. Further, the rotational speeds of the conveyor belts 11 to 14 are controlled so that the first part F1 and the second part F2 of the elastic member F are substantially parallel to or close to the axial direction Y of the nip rolls 41 and 42.
  • the driving device 3 has first to fourth motors M1 to M4.
  • the first and fourth motors M1 and M4 respectively rotate the first and fourth conveyor belts 11 and 14 at a high speed VH ( ⁇ ⁇ ) (where ⁇ is a positive value).
  • the second and third motors M2 and M3 respectively rotate and drive the second and third conveyor belts 12 and 13 at a low speed VL ( ⁇ ⁇ ) smaller than the high speed VH ( ⁇ ⁇ ). Due to the difference in speed of the conveyor belt, the first part F1 and the second part F2 of the elastic member F at the portion sandwiched between the nip rolls 41 and 42 (FIG. 6) of FIG. It is almost parallel to the axis. 1, 2, and 4, the belts 11 and 14 driven at a high speed VH ( ⁇ ⁇ ) are provided with halftone dots.
  • the nip rolls 41 and 42 (FIG. 6) in FIG. 5 are arranged in the inner space between the first set of conveyor belts 1A and the second set of conveyor belts 1B.
  • the elastic member F is sandwiched between the pair of sheets S at the nip position O and adhered to the sheet S as shown in FIGS.
  • the stretchable laminate W is formed.
  • an adhesive may be applied to the surfaces of the sheet S facing each other, or both the sheets S, S may be welded together.
  • a pair of cutters C, C are disposed downstream of the pair of nip rolls 41, 42 in FIG.
  • the pair of cutters C, C includes two pairs of conveyor belts 1A, 1B, outside the pair of sheets S, S after the elastic member F is sandwiched between the pair of sheets S, S.
  • the elastic member F is cut at a position between 1B. Note that the protruding portion of the cut elastic member F from the sheets S, S is contracted by removing the tension.
  • the stretch laminate W thus generated is cut vertically and horizontally and used as a part of the side panel.
  • This manufacturing apparatus has the control apparatus 5 of FIG. 4, as will be described in detail below.
  • the control device 5 sets the peripheral speeds of the first to fourth conveyor belts 11 to 14 shown in FIG. 4 according to the nip position O where the nip rolls 41 and 42 shown in FIG. That is, the control device 5 controls the servo motors M1 to M4 (an example of the driving device 3) so that the first to fourth conveyor belts 11 to 14 have the set peripheral speed.
  • the nip position O is on the center line 1 ⁇ / b> C between the first and third conveyor belts 11 and 13 and the second and fourth conveyor belts 12 and 14, that is, a pair of nip rolls 41. 42
  • the nip position O to the top surfaces of the first and third conveyor belts 11, 13 and the distance from the nip position O to the top surfaces of the second and fourth conveyor belts 12, 14 are equal to each other.
  • the conveyance distance (distance from the winding start position to the nip position) between the first part F1 and the second part F2 of the member is equal to each other.
  • the first part F1 and the second part F2 are conveyed toward the nip position O at the same average peripheral speed (VH + VL) / 2. That is, the first conveyor belt 11 and the fourth conveyor belt 14 of FIG. 4 are rotated at high speed so that the first conveyor belt 11 and the fourth conveyor belt 14 have a circumferential speed VH, while the second conveyor belt 12 and the third conveyor belt 12 13, the second and third motors M2 and M3 rotate at a low speed so that the peripheral speed VL is reached.
  • the nip position O may be in a state of being misaligned in the thickness direction Z of the sheet S.
  • the elastic member F on the side closer to the nip roll 42 that is, The distance to the nip position O of the second part F2 is shorter than that of the first part F1. Therefore, in this case, the average circumferential speed V24 of the second and fourth conveyor belts 12, 14 is smaller than the average circumferential speed V13 of the first and third conveyor belts 11, 13, so that the operation is performed in a state where the average circumferential speed V24 is smaller. Peripheral speed is set.
  • the peripheral speed of the first conveyor belt 11 in FIG. 4 is VH + ⁇
  • the peripheral speed of the third conveyor belt 13 is VL + ⁇
  • the peripheral speed of the second conveyor belt 12 is VL ⁇
  • the peripheral speed of the fourth conveyor belt 14 is VH.
  • the rotation speed of each of the motors M1 to M4 is controlled by the control device 5 so as to be ⁇ .
  • the elastic member closer to the nip roll 41. F that is, the distance to the nip position O of the first part F1 is shorter than that of the second part F2. Therefore, in this case, the average circumferential speed V24 of the second and fourth conveyor belts 12, 14 is operated in a state where the average circumferential speed V24 of the second and fourth conveyor belts 12, 14 is larger than the average circumferential speed V13 of the first and third conveyor belts 11, 13. Peripheral speed is set.
  • the peripheral speed of the first conveyor belt 11 in FIG. 4 is VH ⁇
  • the peripheral speed of the third conveyor belt 13 is VL ⁇
  • the peripheral speed of the second conveyor belt 12 is VL + ⁇
  • the peripheral speed of the fourth conveyor belt 14 is The rotation speed of each of the motors M1 to M4 is controlled by the control device 5 so that the speed becomes VH + ⁇ .
  • control device 5 may be measured by an operator, and the measured value may be input to the control device 5 (FIG. 4) by the operator, or the shaft sensor 41C or The displacement amount of 42C may be measured, and the measured value may be input from the sensor to the control device 5 (FIG. 4).
  • the control device 5 may store the relationship between the misalignment value, that is, the relationship between the displacement amount and the value ⁇ that increases or decreases the rotational speed of each motor in the storage unit in advance.
  • the operator visually observes only the misalignment direction and inputs the value of the change ⁇ in the peripheral speed to the control device 5 to expand and contract the laminate. While the pitch P of the elastic member F at W is visually inspected, the value of the change ⁇ may be repeatedly input to the control device 5 until the pitch P becomes substantially uniform.
  • the first part F1 and the second part F2 of the elastic member F are conveyed along the upper and lower surfaces of the conveyor belts 11 to 14 while being slightly inclined with respect to the axial direction Y. Thereafter, due to the speed difference between the first and fourth conveyor belts 11 and 14 driven at the high speed VH of FIG. 4 and the second and third conveyor belts 12 and 13 driven at the low speed VL, FIG. As shown, the first part F1 and the second part F2 are supplied between the nip rolls 41 and 42 in FIG. 2 while approaching parallel to the axial direction Y of the nip roll 41. On the other hand, the two sheets S and S are supplied between a pair of nip rolls 41 and 42.
  • the elastic member F is supplied between the two sheets S and S in a state where the first part F1 and the second part F2 of the elastic member F are separated from each other in the transport direction X. At this time, the first part F1 and the second part F2 are supplied between the two sheets S and S while being separated from each other in the thickness direction Z of the sheet S shown in FIG. 6A.
  • the elastic member F is conveyed to the nip position O along the circumferential direction R of the nip rolls 41 and 42. After this conveyance, the elastic member F is sandwiched between the two sheets S and S by the pair of nip rolls 41 and 42, and the elastic member F in FIG. 6B adheres to the two sheets S and S one after another. It is arranged in the state that was done.
  • the elastic member F is sandwiched between the pair of sheets S, S, as shown in FIG. 2, the elastic member is interposed between the first part F1 and the second part F2. F is cut by the cutter C. In this way, the stretchable laminated body W in which the first part F1, the second part, and F2 are alternately arranged in parallel and regularly with a predetermined pitch P is generated.
  • the average circumferential speed V24 of the second and fourth conveyor belts 12, 14 is operated in a state smaller than the average circumferential speed V13 of the first and third conveyor belts 11, 13.
  • the second part F2 having a short transport distance to the nip position O is transported at the speeds VH ⁇ and VL ⁇
  • the first part F1 having a long transport distance to the nip position O is transported at the speeds VH + ⁇ and VL + ⁇ .
  • the average circumferential speed V24 of the second and fourth conveyor belts 12 and 14 is operated in a state higher than the average circumferential speed V13 of the first and third conveyor belts 11 and 13.
  • the first part F1 having a short transport distance to the nip position O is transported at the speeds VH- ⁇ and VL- ⁇
  • the second part F2 having a long transport distance to the nip position O is transported at the speeds VH + ⁇ and VL + ⁇ .
  • the first portion F1 and the second portion F2 are alternately arranged in parallel with each other and regularly arranged at a predetermined pitch P.
  • a stacked body W is generated.
  • the diameters of the upper and lower nip rolls 41 and 42 may be different from each other.
  • the peripheral speed of the conveyor belts 11 to 14 may be set in consideration of the difference in curvature between the nip rolls 41 and 42.
  • the increase / decrease of the peripheral speed is all set to ⁇ ⁇ , but the absolute values of increase / decrease such as + ⁇ 1, ⁇ 2 may be different between the upper and lower conveyor belts, and one of the upper and lower sides is constant. Only the other speed may be increased or decreased at high speed.
  • engagement portions that engage with the elastic member F are provided on the entire circumference of both ends in the axial direction Y of the nip rolls 41 and 42 in FIG. 2 so that the elastic member F can be conveyed without slipping along the outer periphery of the nip roll. May be.
  • the elastic member F may be formed in a band shape.
  • the sheet S may be a belt-like narrow one like a tape.
  • the elastic member F may be sandwiched between other wide sheets.
  • one or both of the sheets S and S may be discontinuous sheets instead of continuous sheets.
  • a plurality of sets of the present manufacturing apparatus may be provided in parallel.
  • the elastic member may be melted and cut, and further, does not need to be cut.
  • the first part and the second part of the elastic member do not need to be parallel to each other, and may be arranged on the sheet while being inclined obliquely.
  • a plurality of elastic member lead-out portions may be provided in the spinner, and a plurality of elastic members may be led out from the spinner.
  • the length in the width direction Y (FIG. 1) of one of the nip rolls is outside the first set of conveyor belts 1A. It may be larger than the length from the side surface to the outer surface of the second set of conveyor belts 1B.
  • the length of the second nip roll 42 in the width direction Y (FIG. 1). May be larger than the length between the outer surfaces of the two conveyor belts 1A, 1B.
  • the width of the sheet S supplied to the second nip roll 42 may be larger than the width between the outer surfaces.
  • a sheet S having the same width as that of the sheet S supplied to the second nip roll 42 may be supplied to the first nip roll 41. That is, even if the sheet S having a width larger than the width between the outer surfaces of the two conveyor belts is supplied to the first nip roll 41 disposed in the inner space between the two conveyor belts 1A and 1B. Good.
  • the sheet S is a soft material such as a non-woven fabric, even if the sheet S is larger than the width between the outer surfaces, the sheet S can be supplied to the first nip roll 41 disposed in the inner space. In this case, both side edges along the conveyance direction X of the sheet S supplied to the first nip roll 41 may be folded in advance before supply.
  • the present invention can be used for manufacturing a stretchable laminate in which a plurality of linear elastic members are arranged on a sheet.
  • Conveyor 1A First set of conveyor belts 1B: Second set of conveyor belts 1C: Center line 11-14: First to fourth conveyor belts 2: Spinner 20: Main body 21: Hollow shaft 22: Pulley 3: Drive Device 41, 42: Nip roll 5: Control device C: Cutter F: Elastic member F1: First part F2: Second part M1: First motor M2: Second motor M3: Third motor M4: Fourth motor N: Method Linear direction (radial direction) O: nip position R: circumferential direction S: sheet T: tangential direction X: transport direction Y: width direction, axial direction Z: thickness direction W: stretchable laminate

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Abstract

Provided is a stretch layered body fabrication method, whereby at least one elastic member (F) is positioned in at least one sheet (S), the method comprising: a step of winding in a spiral shape an elastic member (F) in a state of being spanned upon two conveyor belts (1A, 1B); a step of supplying at least one sheet (S) between a pair of nip rolls (41, 42); a step of supplying the at least one elastic member (F) to the surface of the sheet (S), wherein one portion and another portion of the at least one elastic member (F), being extended in a width direction which traverses the sheet (S), are mutually separated in a conveyance direction; a step of the one portion and the another portion of the elastic member (F) being bonded to the sheet (S) by the pair of nip rolls (41, 42); and a step of setting, according to a nip location in the thickness direction of the sheet (S) whereat the nip rolls (41, 42) make mutual contact via the sheet (S), a circumferential speed of first - fourth conveyor belts (11, 12, 13, 14).

Description

伸縮積層体の製造方法および装置Method and apparatus for manufacturing stretch laminate
　本発明は伸縮積層体の製造方法および装置に関するものである。 The present invention relates to a method and apparatus for producing a stretch laminate.
　使い捨てオムツやパンツにおいてはサイドパネルや本体部に伸縮積層体を配置して前記
オムツ等が胴にフィットする構造を採用している。かかる伸縮積層体の製造方法として、ニップロールで挟まれる一対のテープの間に前記テープの搬送方向に交差する方向に螺線状の弾性部材をコンベヤベルトで送り込み、その弾性部材を前記一対のテープ間で挟んで固定する方法が知られている（特許文献１）。 Disposable diapers and pants employ a structure in which stretchable laminates are arranged on the side panels and the main body so that the diapers and the like fit the trunk. As a method for producing such a stretchable laminate, a spiral elastic member is fed by a conveyor belt between a pair of tapes sandwiched between nip rolls in a direction crossing the tape transport direction, and the elastic member is interposed between the pair of tapes. A method of sandwiching and fixing between the two is known (Patent Document 1).
ＪＰ６３－２４３３０９Ａ（第７図）JP63-243309A (Fig. 7)
　しかし、装置のメンテナンス性を考慮してニップロールをレイアウトした場合に、前記テープの厚さ方向のニップ位置が、コンベアの上下の中心に対し芯ズレした状態となることがある。この場合、弾性部材がニップ位置まで搬送される距離は、コンベヤベルト上側の搬送面に接する弾性部材と、コンベヤベルト下側の搬送面に接する弾性部材とでは互いに異なる。 However, when the nip roll is laid out in consideration of the maintainability of the apparatus, the nip position in the thickness direction of the tape may be shifted from the center of the upper and lower sides of the conveyor. In this case, the distance by which the elastic member is conveyed to the nip position is different between the elastic member in contact with the conveying surface on the upper side of the conveyor belt and the elastic member in contact with the conveying surface on the lower side of the conveyor belt.
　例えば、ニップ位置がコンベヤベルトの上側の搬送面と同一面である場合、上側の弾性部材の搬送距離は、巻き始めの位置からニップ位置までの直線距離となる。一方、コンベヤベルトの下側の弾性部材の搬送距離は、巻き始めの位置から下ニップロールとの接触位置までの直線距離に、当該下ニップロールに沿った円弧状の搬送距離をプラスした値となる。そのため、円弧上の搬送部分の長い分だけ下側の弾性部材が上側の弾性部材に対しニップ位置に到達する時間が遅れる。その結果、弾性部材の所期の配置が得られない。 For example, when the nip position is the same as the upper conveyance surface of the conveyor belt, the conveyance distance of the upper elastic member is a linear distance from the winding start position to the nip position. On the other hand, the conveyance distance of the elastic member below the conveyor belt is a value obtained by adding the arc-shaped conveyance distance along the lower nip roll to the linear distance from the winding start position to the contact position with the lower nip roll. For this reason, the time required for the lower elastic member to reach the nip position with respect to the upper elastic member is delayed by the length of the conveying portion on the arc. As a result, the desired arrangement of the elastic members cannot be obtained.
　したがって、本発明の目的は、コンベヤベルトの２つの搬送面で搬送される弾性部材の搬送時間が互いに同じ値に近づくようにすることである。 Therefore, an object of the present invention is to make the conveying times of the elastic members conveyed by the two conveying surfaces of the conveyor belt approach the same value.
　本発明方法は、少なくとも１枚のシートに前記シートの搬送方向を横切る幅方向に延びる線状の少なくとも１本の弾性部材が配置されて前記幅方向に伸縮する伸縮積層体の製造方法であって、
　互いに前記幅方向に離間した第１組および第２組のコンベヤベルトと、
　前記二組のコンベヤベルトにより搬送される前記弾性部材を前記シートに付着させて前記伸縮積層体を形成する第１および第２のニップロールとを用い、
　前記第１および第２ニップロールのうち少なくとも一方のニップロールが前記二組のコンベヤベルトの間に配置され、
　前記第１組のコンベヤベルトは、前記第１ニップロール側に配置された第１のコンベヤベルトを備え、
　前記第２組のコンベヤベルトは、前記第１ニップロール側に配置された第３のコンベヤベルトを備え、
　前記第１組のコンベヤベルトは、前記第２ニップロール側に配置された第２のコンベヤベルトを備え、
　前記第２組のコンベヤベルトは、前記第２ニップロール側に配置された第４のコンベヤベルトを備え、前記製造方法は、
　前記二組のコンベヤベルトに張架状態で前記弾性部材を螺旋状に巻回する工程と、
　前記少なくとも１枚のシートを前記一対のニップロールの間に供給する工程と、
　前記シートを横切る幅方向に延びた状態の前記少なくとも１本の弾性部材の一部と他部とが前記搬送方向に互いに離間した状態で前記少なくとも１本の弾性部材を前記シートの表面に供給する工程と、
　前記一対のニップロールにより前記弾性部材の前記一部と前記他部を前記シートに付着させる工程と、
　前記両ニップロールが前記シートを介して互いに接する、前記シートの厚さ方向のニップ位置に応じて前記第１～第４コンベヤベルトの周速度を設定する工程とを備える。 The method of the present invention is a method for producing a stretchable laminate in which at least one linear elastic member extending in the width direction crossing the conveying direction of the sheet is disposed on at least one sheet, and expands and contracts in the width direction. ,
A first set and a second set of conveyor belts spaced apart from each other in the width direction;
Using the first and second nip rolls that form the stretchable laminate by attaching the elastic member conveyed by the two sets of conveyor belts to the sheet,
At least one nip roll of the first and second nip rolls is disposed between the two sets of conveyor belts,
The first set of conveyor belts includes a first conveyor belt disposed on the first nip roll side,
The second set of conveyor belts includes a third conveyor belt disposed on the first nip roll side,
The first set of conveyor belts includes a second conveyor belt disposed on the second nip roll side,
The second set of conveyor belts includes a fourth conveyor belt disposed on the second nip roll side, and the manufacturing method includes:
A step of spirally winding the elastic member in a stretched state on the two sets of conveyor belts;
Supplying the at least one sheet between the pair of nip rolls;
The at least one elastic member is supplied to the surface of the sheet in a state in which a part and the other part of the at least one elastic member extending in the width direction across the sheet are separated from each other in the transport direction. Process,
Attaching the part of the elastic member and the other part to the sheet by the pair of nip rolls;
Setting the peripheral speed of the first to fourth conveyor belts in accordance with the nip position in the thickness direction of the sheet where the both nip rolls contact each other via the sheet.
　例えば、前記ニップ位置が第１および第３コンベヤベルトよりも第２および第４コンベヤベルトに近い場合には、第１および第３コンベヤベルトの平均周速度Ｖ１３よりも第２および第４コンベヤベルトの平均周速度Ｖ２４の方が小さい状態で運転され、
　一方、前記ニップ位置が第２および第４コンベヤベルトよりも第１および第３コンベヤベルトに近い場合には、第１および第３コンベヤベルトの平均周速度Ｖ１３よりも第２および第４コンベヤベルトの平均周速度Ｖ２４の方が大きい状態で運転される。 For example, when the nip position is closer to the second and fourth conveyor belts than the first and third conveyor belts, the second and fourth conveyor belts have an average circumferential speed V13 of the first and third conveyor belts. It is operated with the average peripheral speed V24 being smaller,
On the other hand, when the nip position is closer to the first and third conveyor belts than the second and fourth conveyor belts, the second and fourth conveyor belts have an average circumferential speed V13 of the first and third conveyor belts. The vehicle is operated with the average peripheral speed V24 being larger.
　本発明装置は、少なくとも１枚のシートに前記シートの搬送方向を横切る幅方向に延びる線状の少なくとも１本の弾性部材が配置されて前記幅方向に伸縮する伸縮積層体の製造装置であって、
　互いに前記幅方向に離間した第１組および第２組のコンベヤベルトと、
　前記二組のコンベヤベルトに張架状態で前記弾性部材を螺旋状に巻回するスピンナと、
　前記張架状態の前記弾性部材を前記コンベヤベルトの搬送方向の下流に向かって搬送するために前記二組のコンベヤベルトを回転させる駆動装置と、
　前記二組のコンベヤベルトにより搬送される前記弾性部材を前記シートに付着させて前記伸縮積層体を形成する第１および第２のニップロールとを備え、
　前記第１組のコンベヤベルトは、前記第１ニップロール側に配置された第１のコンベヤベルトを備え、
　前記第２組のコンベヤベルトは、前記第１ニップロール側に配置された第３のコンベヤベルトを備え、
　前記第１組のコンベヤベルトは、前記第２ニップロール側に配置された第２のコンベヤベルトを備え、
　前記第２組のコンベヤベルトは、前記第２ニップロール側に配置された第４のコンベヤベルトを備え、
　ここにおいて、前記両ニップロールが前記シートを介して互いに接する、前記シートの厚さ方向のニップ位置に応じて前記第１～第４コンベヤベルトの周速度を設定する制御装置を備える。 The apparatus according to the present invention is an apparatus for manufacturing a stretchable laminate in which at least one linear elastic member extending in the width direction crossing the sheet conveyance direction is disposed on at least one sheet, and expands and contracts in the width direction. ,
A first set and a second set of conveyor belts spaced apart from each other in the width direction;
A spinner for spirally winding the elastic member in a stretched state on the two sets of conveyor belts;
A driving device for rotating the two sets of conveyor belts to convey the elastic member in the stretched state toward the downstream in the conveying direction of the conveyor belt;
First and second nip rolls that form the stretchable laminate by attaching the elastic member conveyed by the two sets of conveyor belts to the sheet;
The first set of conveyor belts includes a first conveyor belt disposed on the first nip roll side,
The second set of conveyor belts includes a third conveyor belt disposed on the first nip roll side,
The first set of conveyor belts includes a second conveyor belt disposed on the second nip roll side,
The second set of conveyor belts includes a fourth conveyor belt disposed on the second nip roll side,
Here, a control device is provided for setting the peripheral speeds of the first to fourth conveyor belts in accordance with the nip position in the thickness direction of the sheet where the nip rolls are in contact with each other via the sheet.
　例えば、前記制御装置は、
　前記ニップ位置が第１および第３コンベヤベルトよりも第２および第４コンベヤベルトに近い場合には、第１および第３コンベヤベルトの平均周速度Ｖ１３よりも第２および第４コンベヤベルトの平均周速度Ｖ２４の方が小さい状態で運転されるように前記周速度を設定し、
　一方、前記ニップ位置が第２および第４コンベヤベルトよりも第１および第３コンベヤベルトに近い場合には、第１および第３コンベヤベルトの平均周速度Ｖ１３よりも第２および第４コンベヤベルトの平均周速度Ｖ２４の方が大きい状態で運転されるように前記周速度を設定する。 For example, the control device
When the nip position is closer to the second and fourth conveyor belts than the first and third conveyor belts, the average circumference of the second and fourth conveyor belts is greater than the average circumferential speed V13 of the first and third conveyor belts. Set the peripheral speed so that the speed V24 is operated in a smaller state,
On the other hand, when the nip position is closer to the first and third conveyor belts than the second and fourth conveyor belts, the second and fourth conveyor belts have an average circumferential speed V13 of the first and third conveyor belts. The peripheral speed is set so that the average peripheral speed V24 is operated in a larger state.
　本発明によれば、搬送距離の短い側のコンベヤベルトの平均周速度が小さく、一方、搬送距離の長い側のコンベヤベルトの平均周速度が大きい。したがって、ニップ位置がシートの厚さ方向にズレて弾性部材の部位ごとに搬送距離が互いに異なっていても、弾性部材が巻き始めの位置から前記ニップ位置まで搬送される時間は均一になり易い。 According to the present invention, the average peripheral speed of the conveyor belt on the short conveyance distance side is small, while the average peripheral speed of the conveyor belt on the long conveyance distance side is large. Therefore, even when the nip position is deviated in the sheet thickness direction and the conveyance distance is different for each portion of the elastic member, the time for which the elastic member is conveyed from the winding start position to the nip position tends to be uniform.
　「少なくとも１本の弾性部材の一部と他部」の文言は、弾性部材が１本である場合の一部と他部を含むと共に、前記弾性部材が複数本である場合に１つの弾性部材と別の弾性部材を含むことを意味する。
　また、「少なくとも１本の弾性部材が前記シートを横切る幅方向に延びた状態」の文言は、弾性部材が前記搬送方向に対して直交方向に延びた状態を含むと共に、前記弾性部材が前記搬送方向に対して斜め方向に延びた状態を含むことを意味する。 The phrase “a part of at least one elastic member and another part” includes a part and another part when there is one elastic member, and one elastic member when there are a plurality of elastic members. And another elastic member.
Further, the phrase “a state in which at least one elastic member extends in the width direction across the sheet” includes a state in which the elastic member extends in a direction orthogonal to the conveyance direction, and the elastic member is in the conveyance direction. It means to include a state extending in an oblique direction with respect to the direction.
図１は本発明にかかる製造装置を示す概略斜視図である。FIG. 1 is a schematic perspective view showing a manufacturing apparatus according to the present invention. 図２は同装置の上流部分を示す概略斜視図である。FIG. 2 is a schematic perspective view showing an upstream portion of the apparatus. 図３は同装置の一部であるスピンナの側面図である。FIG. 3 is a side view of a spinner which is a part of the apparatus. 図４は同装置のコンベヤの下流部分示す概略斜視図である。FIG. 4 is a schematic perspective view showing a downstream portion of the conveyor of the apparatus. 図５は同装置の上流部分を示す概略平面図である。FIG. 5 is a schematic plan view showing an upstream portion of the apparatus. 図６Ａは同装置を示す概念的な側面図、図６Ｂは伸縮積層体の拡大側面図である。6A is a conceptual side view showing the apparatus, and FIG. 6B is an enlarged side view of the stretchable laminate. 図７はニップ位置がコンベヤベルトに対し下方に位置ズレした場合を示す側面図である。FIG. 7 is a side view showing a case where the nip position is shifted downward with respect to the conveyor belt. 図８はニップ位置がコンベヤベルトに対し上方に位置ズレした場合を示す側面図である。FIG. 8 is a side view showing a case where the nip position is displaced upward with respect to the conveyor belt.
　本発明は、添付の書類を参考にした以下の好的な実施例の説明からより明瞭に理解されるであろう。しかしながら、実施例および図面は単なる図示および説明のためのものであり、本発明の範囲を定めるために利用されるべきものではない。本発明の範囲は請求の範囲のみによって定まる。添付図面において、複数の図面における同一の部品番号は、同一または相当部分を示す。 The present invention will be understood more clearly from the following description of preferred embodiments with reference to the accompanying documents. However, the examples and figures are for illustration and description only and should not be used to define the scope of the present invention. The scope of the present invention is defined only by the claims. In the accompanying drawings, the same part numbers in a plurality of drawings indicate the same or corresponding parts.
　以下、本発明の一実施例が図面にしたがって説明される。
　図１は伸縮積層体Ｗの製造装置を示す。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows an apparatus for manufacturing the stretch laminate W.
　本実施例の伸縮積層体Ｗは一対のシートＳ，Ｓの間に前記シートＳの搬送方向Ｘを横切る幅方向Ｙに延びる線状の弾性部材Ｆが挟まれて前記幅方向Ｙに伸縮する。なお、前記伸縮積層体Ｗは、例えば切断されることで使い捨てオムツやパンツのサイドパネルとなる。 In the stretchable laminated body W of the present embodiment, a linear elastic member F extending in the width direction Y across the transport direction X of the sheet S is sandwiched between the pair of sheets S, S and stretches in the width direction Y. In addition, the said elastic laminated body W becomes a side panel of a disposable diaper or pants by being cut | disconnected, for example.
　前記シートＳとしては搬送方向Ｘに連続する連続ウエブであってもよいし、搬送方向Ｘに不連続のウエブや樹脂シートであってもよい。本実施例の場合、前記弾性部材Ｆは、いわゆる糸ゴムであるが、帯状のゴムであってもよい。 The sheet S may be a continuous web continuous in the transport direction X, or a discontinuous web or resin sheet in the transport direction X. In the case of the present embodiment, the elastic member F is a so-called thread rubber, but may be a belt-like rubber.
　本製造装置はスピンナ２、コンベヤ１、カッタＣ、一対の第１および第２ニップロール４１，４２などを備える。前記コンベヤ１は、例えば４本の第１～第４のコンベヤベルト１１～１４および駆動装置３を備える。 The manufacturing apparatus includes a spinner 2, a conveyor 1, a cutter C, a pair of first and second nip rolls 41 and 42, and the like. The conveyor 1 includes, for example, four first to fourth conveyor belts 11 to 14 and a driving device 3.
　図２に明示するように、前記第１および第２コンベヤベルト１１,１２は上下に互いに接近して配置されている。また、第３および第４コンベヤベルト１３，１４は上下に互いに接近して配置されている。前記第１および２第コンベヤベルト１１,１２（第１組のコンベヤベルト１Ａ）と第３および第４コンベヤベルト１３，１４（第２組のコンベヤベルト１Ｂ）はニップロール４１，４２の幅方向Ｙに互いに離間して配置されている。 As clearly shown in FIG. 2, the first and second conveyor belts 11 and 12 are arranged close to each other in the vertical direction. The third and fourth conveyor belts 13 and 14 are arranged close to each other in the vertical direction. The first and second conveyor belts 11 and 12 (first set of conveyor belts 1A) and the third and fourth conveyor belts 13 and 14 (second set of conveyor belts 1B) are arranged in the width direction Y of the nip rolls 41 and 42. They are spaced apart from each other.
　前記第１組および第２組のコンベヤベルト１Ａ，１Ｂは、それぞれ、前記上側の第１ニップロール４１側に配置された第１および第３のコンベヤベルト１１，１３を備える。一方、前記第１組および第２組のコンベヤベルト１Ａ，１Ｂは、それぞれ、前記下側の第２ニップロール４２側に配置された第２および第４のコンベヤベルト１２，１４を備える。 The first set and the second set of conveyor belts 1A and 1B respectively include first and third conveyor belts 11 and 13 disposed on the upper first nip roll 41 side, respectively. On the other hand, the first set and the second set of conveyor belts 1A and 1B respectively include second and fourth conveyor belts 12 and 14 disposed on the lower second nip roll 42 side.
　すなわち、第１組のコンベヤベルト１Ａは、第１ニップロール４１側に配置された第１コンベヤベルト１１と、第２ニップロール４２側に配置された第２コンベヤベルト１２とを備える。一方、第２組のコンベヤベルト１Ｂは、第１ニップロール４１側に配置された第３コンベヤベルト１３と、第２ニップロール４２側に配置された第４コンベヤベルト１４とを備える。 That is, the first set of conveyor belts 1A includes the first conveyor belt 11 disposed on the first nip roll 41 side and the second conveyor belt 12 disposed on the second nip roll 42 side. On the other hand, the second set of conveyor belts 1B includes a third conveyor belt 13 disposed on the first nip roll 41 side and a fourth conveyor belt 14 disposed on the second nip roll 42 side.
　前記スピンナ２は、駆動中の前記二組のコンベヤベルト１Ａ，１Ｂに張架状態で前記弾性部材Ｆを螺旋状に巻回する。たとえば、前記スピンナ２はカップ状の本体２０が図３の中空軸２１の回りに回転し、前記中空軸２１内を挿通された弾性部材Ｆが前記本体２０内に配置した案内用の滑車２２の先端から繰り出される。 The spinner 2 spirally winds the elastic member F in a stretched state on the two sets of conveyor belts 1A and 1B being driven. For example, the spinner 2 includes a guide pulley 22 in which a cup-shaped main body 20 rotates around a hollow shaft 21 in FIG. 3 and an elastic member F inserted through the hollow shaft 21 is disposed in the main body 20. It is fed out from the tip.
　一方、図２の各コンベヤベルト１１～１４の外側面がシートＳの搬送方向Ｘの下流に向かって回転している。そのため、弾性部材Ｆに張力が働いた状態、つまり弾性部材Ｆが伸張した状態で弾性部材Ｆは二組のコンベヤベルト１Ａ，１Ｂに螺旋状に連続的に巻回される。 On the other hand, the outer side surfaces of the conveyor belts 11 to 14 shown in FIG. Therefore, the elastic member F is continuously wound spirally around the two sets of conveyor belts 1A and 1B in a state where tension is applied to the elastic member F, that is, in a state where the elastic member F is extended.
　図１において、前記駆動装置３は、前記張架状態の弾性部材Ｆを前記コンベヤベルト１１～１４の搬送方向Ｘの下流に向かって搬送するために前記４本のコンベヤベルト１１～１４を回転させるためのものである。本実施例の場合、図５に示すように、弾性部材Ｆはコンベヤベルト１１～１４の上面および下面に接する。図２の前記コンベヤベルト１１～１４は、前記弾性部材Ｆの第１部Ｆ１と前記弾性部材Ｆの第２部Ｆ２とが前記シートＳの厚さ方向Ｚに互いに離間した状態で、前記２枚のシートＳ，Ｓおよび一対のニップロール４１，４２の間に前記弾性部材Ｆを供給する。また、弾性部材Ｆの第１部Ｆ１および第２部Ｆ２がニップロール４１，４２の軸方向Ｙと略平行になるように又は平行に近づくように、前記コンベヤベルト１１～１４の回転速度が制御される。 In FIG. 1, the driving device 3 rotates the four conveyor belts 11 to 14 in order to convey the stretched elastic member F toward the downstream in the conveying direction X of the conveyor belts 11 to 14. Is for. In the case of the present embodiment, as shown in FIG. 5, the elastic member F contacts the upper and lower surfaces of the conveyor belts 11-14. The conveyor belts 11 to 14 in FIG. 2 are configured so that the first part F1 of the elastic member F and the second part F2 of the elastic member F are separated from each other in the thickness direction Z of the sheet S. The elastic member F is supplied between the sheets S and S and the pair of nip rolls 41 and 42. Further, the rotational speeds of the conveyor belts 11 to 14 are controlled so that the first part F1 and the second part F2 of the elastic member F are substantially parallel to or close to the axial direction Y of the nip rolls 41 and 42. The
　図４において、前記駆動装置３は第１～第４モータＭ１～Ｍ４を有する。前記第１および第４モータＭ１，Ｍ４は、それぞれ、第１および第４コンベヤベルト１１,１４を高速度ＶＨ（±Δ）で回転駆動させる（但し、Δは正の値）。一方、前記第２および第３モータＭ２，Ｍ３は、それぞれ、第２および第３コンベヤベルト１２，１３を高速度ＶＨ（±Δ）よりも小さい低速度ＶＬ（±Δ）で回転駆動させる。このコンベヤベルトの速度差により、図５の前記ニップロール４１，４２（図６）に挟まれる部位の弾性部材Ｆの前記第１部Ｆ１と第２部Ｆ２とがニップロール４１，４２（図６）の軸心に略平行になる。
　なお、図１、図２および図４において、高速度ＶＨ（±Δ）で駆動されるベルト１１，１４には網点が施されている。 In FIG. 4, the driving device 3 has first to fourth motors M1 to M4. The first and fourth motors M1 and M4 respectively rotate the first and fourth conveyor belts 11 and 14 at a high speed VH (± Δ) (where Δ is a positive value). On the other hand, the second and third motors M2 and M3 respectively rotate and drive the second and third conveyor belts 12 and 13 at a low speed VL (± Δ) smaller than the high speed VH (± Δ). Due to the difference in speed of the conveyor belt, the first part F1 and the second part F2 of the elastic member F at the portion sandwiched between the nip rolls 41 and 42 (FIG. 6) of FIG. It is almost parallel to the axis.
1, 2, and 4, the belts 11 and 14 driven at a high speed VH (± Δ) are provided with halftone dots.
　図５の前記ニップロール４１，４２（図６）は、前記第１組のコンベヤベルト１Ａと第２組のコンベヤベルト１Ｂの間の内側の空間において、図６Ａの一対の前記シートＳを前記二組のコンベヤベルト１Ａ，１Ｂ間に導入し、図６Ａ～図８に示すように、ニップ位置Ｏにおいて前記弾性部材Ｆを前記一対のシートＳの間で挟むと共に前記シートＳに付着させて図２の前記伸縮積層体Ｗを形成する。なお、前記シートＳに弾性部材Ｆを付着させる方法としては、シートＳの互いに対面する表面に接着剤が塗布されてもよいし、あるいは、両シートＳ，Ｓが互いに溶着されてもよい。 The nip rolls 41 and 42 (FIG. 6) in FIG. 5 are arranged in the inner space between the first set of conveyor belts 1A and the second set of conveyor belts 1B. As shown in FIGS. 6A to 8, the elastic member F is sandwiched between the pair of sheets S at the nip position O and adhered to the sheet S as shown in FIGS. The stretchable laminate W is formed. As a method for attaching the elastic member F to the sheet S, an adhesive may be applied to the surfaces of the sheet S facing each other, or both the sheets S, S may be welded together.
　図２の前記一対のニップロール４１，４２の下流には一対のカッタＣ，Ｃが配置されている。前記一対のカッタＣ，Ｃは、前記弾性部材Ｆが前記一対のシートＳ，Ｓの間に挟まれた後に、前記一対のシートＳ，Ｓよりも外側において、かつ、二組のコンベヤベルト１Ａ，１Ｂの間の位置において前記弾性部材Ｆを切断する。
　なお、切断された弾性部材ＦのシートＳ，Ｓから、はみ出している部分は張力が取り除かれて縮む。 A pair of cutters C, C are disposed downstream of the pair of nip rolls 41, 42 in FIG. The pair of cutters C, C includes two pairs of conveyor belts 1A, 1B, outside the pair of sheets S, S after the elastic member F is sandwiched between the pair of sheets S, S. The elastic member F is cut at a position between 1B.
Note that the protruding portion of the cut elastic member F from the sheets S, S is contracted by removing the tension.
　こうして生成された伸縮積層体Ｗは、縦横に切断されて、前記サイドパネルなど一部として用いられる。 The stretch laminate W thus generated is cut vertically and horizontally and used as a part of the side panel.
　つぎに、本発明の要部について説明される。
　本製造装置は、以下に詳細に説明するように、図４の制御装置５を有する。この制御装置５は図６の前記両ニップロール４１，４２が前記シートＳを介して接するニップ位置Ｏに応じて図４の前記第１～第４のコンベヤベルト１１～１４の周速度を設定する。すなわち、制御装置５は第１～第４のコンベヤベルト１１～１４が前記設定された周速度となるように各サーボモータＭ１～Ｍ４（駆動装置３の一例）を制御する。 Next, the main part of the present invention will be described.
This manufacturing apparatus has the control apparatus 5 of FIG. 4, as will be described in detail below. The control device 5 sets the peripheral speeds of the first to fourth conveyor belts 11 to 14 shown in FIG. 4 according to the nip position O where the nip rolls 41 and 42 shown in FIG. That is, the control device 5 controls the servo motors M1 to M4 (an example of the driving device 3) so that the first to fourth conveyor belts 11 to 14 have the set peripheral speed.
　図６に示すように、ニップ位置Ｏが第１および第３コンベヤベルト１１，１３と第２および第４コンベヤベルト１２，１４との間のセンターライン１Ｃ上にある場合、つまり、一対のニップロール４１，４２のニップ位置Ｏから第１および第３コンベヤベルト１１，１３の上面までの距離と、前記ニップ位置Ｏから第２および第４コンベヤベルト１２，１４の上面までの距離が互いに等しい場合、弾性部材の第１部Ｆ１と第２部Ｆ２との搬送距離（巻き始めの位置からニップ位置までの距離）は互いに等しい。 As shown in FIG. 6, when the nip position O is on the center line 1 </ b> C between the first and third conveyor belts 11 and 13 and the second and fourth conveyor belts 12 and 14, that is, a pair of nip rolls 41. 42, the nip position O to the top surfaces of the first and third conveyor belts 11, 13 and the distance from the nip position O to the top surfaces of the second and fourth conveyor belts 12, 14 are equal to each other. The conveyance distance (distance from the winding start position to the nip position) between the first part F1 and the second part F2 of the member is equal to each other.
　したがって、この場合、第１部Ｆ１と第２部Ｆ２とは互いに等しい平均周速度（ＶＨ＋ＶＬ）／２でニップ位置Ｏに向かって搬送される。すなわち、図４の第１コンベヤベルト１１および第４コンベヤベルト１４は周速度ＶＨとなるように第１および第４モータＭ１，Ｍ４が高速回転し、一方、第２コンベヤベルト１２および第３コンベヤベルト１３は周速度ＶＬとなるように第２および第３モータＭ２，Ｍ３が低速回転する。 Therefore, in this case, the first part F1 and the second part F2 are conveyed toward the nip position O at the same average peripheral speed (VH + VL) / 2. That is, the first conveyor belt 11 and the fourth conveyor belt 14 of FIG. 4 are rotated at high speed so that the first conveyor belt 11 and the fourth conveyor belt 14 have a circumferential speed VH, while the second conveyor belt 12 and the third conveyor belt 12 13, the second and third motors M2 and M3 rotate at a low speed so that the peripheral speed VL is reached.
　ところで、前述のように、装置のメンテナンス性を考慮してニップロール４１，４２をレイアウトした場合に、前記ニップ位置ＯはシートＳの厚さ方向Ｚに芯ズレした状態となる場合がある。 Incidentally, as described above, when the nip rolls 41 and 42 are laid out in consideration of the maintainability of the apparatus, the nip position O may be in a state of being misaligned in the thickness direction Z of the sheet S.
　図７に示すように、前記ニップ位置Ｏが第１および第３コンベヤベルト１１，１３よりも第２および第４コンベヤベルト１２，１４に近い場合には、ニップロール４２に近い側の弾性部材Ｆつまり第２部Ｆ２のニップ位置Ｏまでの距離は第１部Ｆ１のそれに比べ短い。したがって、この場合は、第１および第３コンベヤベルト１１，１３の平均周速度Ｖ１３よりも第２および第４コンベヤベルト１２，１４の平均周速度Ｖ２４の方が小さい状態で運転されるように前記周速度が設定される。 As shown in FIG. 7, when the nip position O is closer to the second and fourth conveyor belts 12 and 14 than the first and third conveyor belts 11 and 13, the elastic member F on the side closer to the nip roll 42, that is, The distance to the nip position O of the second part F2 is shorter than that of the first part F1. Therefore, in this case, the average circumferential speed V24 of the second and fourth conveyor belts 12, 14 is smaller than the average circumferential speed V13 of the first and third conveyor belts 11, 13, so that the operation is performed in a state where the average circumferential speed V24 is smaller. Peripheral speed is set.
　たとえば、図４の第１コンベヤベルト１１の周速度はＶＨ＋Δ、第３コンベヤベルト１３の周速度はＶＬ＋Δ、第２コンベヤベルト１２の周速度はＶＬ－Δ、第４コンベヤベルト１４の周速度はＶＨ－Δとなるように各モータＭ１～Ｍ４の回転速度が制御装置５により制御される。 For example, the peripheral speed of the first conveyor belt 11 in FIG. 4 is VH + Δ, the peripheral speed of the third conveyor belt 13 is VL + Δ, the peripheral speed of the second conveyor belt 12 is VL−Δ, and the peripheral speed of the fourth conveyor belt 14 is VH. The rotation speed of each of the motors M1 to M4 is controlled by the control device 5 so as to be −Δ.
　一方、図８に示すように、前記ニップ位置Ｏが第２および第４コンベヤベルト１２，１４よりも第１および第３コンベヤベルト１１，１３に近い場合には、ニップロール４１に近い側の弾性部材Ｆつまり第１部Ｆ１のニップ位置Ｏまでの距離は第２部Ｆ２のそれに比べ短い。したがって、この場合は、第１および第３コンベヤベルト１１，１３の平均周速度Ｖ１３よりも第２および第４コンベヤベルト１２，１４の平均周速度Ｖ２４の方が大きい状態で運転されるように前記周速度が設定される。 On the other hand, as shown in FIG. 8, when the nip position O is closer to the first and third conveyor belts 11 and 13 than to the second and fourth conveyor belts 12 and 14, the elastic member closer to the nip roll 41. F, that is, the distance to the nip position O of the first part F1 is shorter than that of the second part F2. Therefore, in this case, the average circumferential speed V24 of the second and fourth conveyor belts 12, 14 is operated in a state where the average circumferential speed V24 of the second and fourth conveyor belts 12, 14 is larger than the average circumferential speed V13 of the first and third conveyor belts 11, 13. Peripheral speed is set.
　たとえば、図４の第１コンベヤベルト１１の周速度はＶＨ－Δ、第３コンベヤベルト１３の周速度はＶＬ－Δ、第２コンベヤベルト１２の周速度はＶＬ＋Δ、第４のコンベヤベルト１４の周速度はＶＨ＋Δとなるように各モータＭ１～Ｍ４の回転速度が制御装置５により制御される。 For example, the peripheral speed of the first conveyor belt 11 in FIG. 4 is VH−Δ, the peripheral speed of the third conveyor belt 13 is VL−Δ, the peripheral speed of the second conveyor belt 12 is VL + Δ, and the peripheral speed of the fourth conveyor belt 14 is The rotation speed of each of the motors M1 to M4 is controlled by the control device 5 so that the speed becomes VH + Δ.
　図６の前記ニップ位置Ｏの芯ズレの値（変位量）はオペレータが計測し、その計測値がオペレータにより制御装置５（図４）に入力されてもよいし、変位センサで軸芯４１Ｃ又は４２Ｃの変位量を計測し、その計測値が前記センサから制御装置５（図４）に入力されてもよい。この場合、制御装置５（図４）は芯ズレの値、つまり変位量と各モータの回転速度を増加減する値Δとの関係を予め記憶部に記憶しておいてもよい。 6 may be measured by an operator, and the measured value may be input to the control device 5 (FIG. 4) by the operator, or the shaft sensor 41C or The displacement amount of 42C may be measured, and the measured value may be input from the sensor to the control device 5 (FIG. 4). In this case, the control device 5 (FIG. 4) may store the relationship between the misalignment value, that is, the relationship between the displacement amount and the value Δ that increases or decreases the rotational speed of each motor in the storage unit in advance.
　また、前記ニップ位置Ｏの芯ズレの値は計測せずに、オペレータが目視で芯ズレの方向のみを見て、前記周速度の変化量Δの値を制御装置５に入力し、伸縮積層体Ｗにおける弾性部材ＦのピッチＰを目視で検査しながら、前記ピッチＰが概ね均一になるまで前記変化量Δの値を制御装置５に繰り返し入力してもよい。 Further, without measuring the value of the misalignment at the nip position O, the operator visually observes only the misalignment direction and inputs the value of the change Δ in the peripheral speed to the control device 5 to expand and contract the laminate. While the pitch P of the elastic member F at W is visually inspected, the value of the change Δ may be repeatedly input to the control device 5 until the pitch P becomes substantially uniform.
　つぎに、製造方法が説明される。まず、図６のように、ニップ位置Ｏが上下のコンベヤベルトのセンタライン１Ｃ上に配置されている場合について説明される。 Next, the manufacturing method will be described. First, as shown in FIG. 6, a case where the nip position O is arranged on the center line 1C of the upper and lower conveyor belts will be described.
　図１のコンベヤベルト１１～１４が駆動装置３により回転駆動されている状態で、スピンナ２から弾性部材Ｆが繰り出され、弾性部材Ｆがコンベヤベルト１１～１４の周りに張設状態で巻き付けられる。これにより、弾性部材Ｆはコンベヤベルト１１～１４の周りに螺旋状に巻き付けられながら、搬送方向Ｘの下流に向かって搬送される。 In a state where the conveyor belts 11 to 14 in FIG. 1 are rotationally driven by the driving device 3, the elastic member F is fed out from the spinner 2, and the elastic member F is wound around the conveyor belts 11 to 14 in a stretched state. As a result, the elastic member F is conveyed downstream in the conveying direction X while being spirally wound around the conveyor belts 11 to 14.
　すなわち、弾性部材Ｆの第１部Ｆ１と第２部Ｆ２は、軸方向Ｙに対して若干傾いた状態で、コンベヤベルト１１～１４の上面と下面に沿って搬送される。その後、図４の高速度ＶＨで駆動される第１および第４コンベヤベルト１１，１４と、低速度ＶＬで駆動される第２および第３コンベヤベルト１２，１３との速度差により、図５に示すように、第１部Ｆ１と第２部Ｆ２とがニップロール４１の軸方向Ｙに平行に近づきながら図２のニップロール４１，４２間に供給される。
　一方、前記２枚のシートＳ，Ｓが一対のニップロール４１，４２間に供給される。 That is, the first part F1 and the second part F2 of the elastic member F are conveyed along the upper and lower surfaces of the conveyor belts 11 to 14 while being slightly inclined with respect to the axial direction Y. Thereafter, due to the speed difference between the first and fourth conveyor belts 11 and 14 driven at the high speed VH of FIG. 4 and the second and third conveyor belts 12 and 13 driven at the low speed VL, FIG. As shown, the first part F1 and the second part F2 are supplied between the nip rolls 41 and 42 in FIG. 2 while approaching parallel to the axial direction Y of the nip roll 41.
On the other hand, the two sheets S and S are supplied between a pair of nip rolls 41 and 42.
　すなわち、前記弾性部材Ｆの第１部Ｆ１と第２部Ｆ２とが前記搬送方向Ｘに互いに離間した状態で前記弾性部材Ｆが前記２枚のシートＳ，Ｓの間に供給される。この際、前記第１部Ｆ１と第２部Ｆ２とは図６Ａに示す前記シートＳの厚さ方向Ｚに互いに離間した状態で前記２枚のシートＳ，Ｓの間に供給される。 That is, the elastic member F is supplied between the two sheets S and S in a state where the first part F1 and the second part F2 of the elastic member F are separated from each other in the transport direction X. At this time, the first part F1 and the second part F2 are supplied between the two sheets S and S while being separated from each other in the thickness direction Z of the sheet S shown in FIG. 6A.
　その後、弾性部材Ｆはニップロール４１，４２の周方向Ｒに沿ってニップ位置Ｏまで搬送される。この搬送後、前記一対のニップロール４１，４２により前記弾性部材Ｆが前記２枚のシートＳ，Ｓの間に挟まれて、図６Ｂの弾性部材Ｆが次々に２枚のシートＳ，Ｓに接着された状態で配置される。 Thereafter, the elastic member F is conveyed to the nip position O along the circumferential direction R of the nip rolls 41 and 42. After this conveyance, the elastic member F is sandwiched between the two sheets S and S by the pair of nip rolls 41 and 42, and the elastic member F in FIG. 6B adheres to the two sheets S and S one after another. It is arranged in the state that was done.
　前記配置後、つまり、前記弾性部材Ｆが前記一対のシートＳ，Ｓの間に挟まれた後に、図２に示すように、前記第１部Ｆ１と第２部Ｆ２との間で前記弾性部材ＦがカッタＣにより切断される。
　こうして、第１部Ｆ１と第２部とＦ２とが交互に互いに平行に、かつ、所定のピッチＰで規則正しく配置された伸縮積層体Ｗが生成される。 After the arrangement, that is, after the elastic member F is sandwiched between the pair of sheets S, S, as shown in FIG. 2, the elastic member is interposed between the first part F1 and the second part F2. F is cut by the cutter C.
In this way, the stretchable laminated body W in which the first part F1, the second part, and F2 are alternately arranged in parallel and regularly with a predetermined pitch P is generated.
　つぎに、図７のように、ニップ位置Ｏが下方の第２および第４コンベヤベルト１２，１４に近い側に芯ズレしている場合について説明する。この場合、第１および第３コンベヤベルト１１，１３の平均周速度Ｖ１３よりも第２および第４コンベヤベルト１２，１４の平均周速度Ｖ２４の方が小さい状態で運転される。 Next, the case where the nip position O is misaligned to the side close to the second and fourth conveyor belts 12 and 14 below as shown in FIG. 7 will be described. In this case, the average circumferential speed V24 of the second and fourth conveyor belts 12, 14 is operated in a state smaller than the average circumferential speed V13 of the first and third conveyor belts 11, 13.
　そのため、ニップ位置Ｏまでの搬送距離が短い第２部Ｆ２が速度ＶＨ－ΔおよびＶＬ－Δで搬送され、ニップ位置Ｏまでの搬送距離が長い第１部Ｆ１が速度ＶＨ＋ΔおよびＶＬ＋Δで搬送される。
　なお、この場合のその他の方法（工程）は前記図６の場合と同様であり、その説明を省略する。 Therefore, the second part F2 having a short transport distance to the nip position O is transported at the speeds VH−Δ and VL−Δ, and the first part F1 having a long transport distance to the nip position O is transported at the speeds VH + Δ and VL + Δ. .
Note that the other methods (steps) in this case are the same as those in the case of FIG.
　つぎに、図８のように、ニップ位置Ｏが上方の第１および第３コンベヤベルト１１，１３に近い側に芯ズレしている場合について説明する。この場合、第１および第３コンベヤベルト１１，１３の平均周速度Ｖ１３よりも第２および第４コンベヤベルト１２，１４の平均周速度Ｖ２４の方が大きい状態で運転される。 Next, the case where the nip position O is misaligned to the side closer to the upper first and third conveyor belts 11 and 13 as shown in FIG. 8 will be described. In this case, the average circumferential speed V24 of the second and fourth conveyor belts 12 and 14 is operated in a state higher than the average circumferential speed V13 of the first and third conveyor belts 11 and 13.
　そのため、ニップ位置Ｏまでの搬送距離が短い第１部Ｆ１が速度ＶＨ－ΔおよびＶＬ－Δで搬送され、ニップ位置Ｏまでの搬送距離が長い第２部Ｆ２が速度ＶＨ＋ΔおよびＶＬ＋Δで搬送される。
　なお、この場合のその他の方法（工程）は前記図６の場合と同様であり、その説明を省略する。 Therefore, the first part F1 having a short transport distance to the nip position O is transported at the speeds VH-Δ and VL-Δ, and the second part F2 having a long transport distance to the nip position O is transported at the speeds VH + Δ and VL + Δ. .
Note that the other methods (steps) in this case are the same as those in the case of FIG.
　こうして、ニップ位置Ｏがセンタライン１Ｃに対して上下に芯ズレしていても、第１部Ｆ１と第２部Ｆ２とが交互に互いに平行に、かつ、所定のピッチＰで規則正しく配置された伸縮積層体Ｗが生成される。 Thus, even if the nip position O is vertically misaligned with respect to the center line 1C, the first portion F1 and the second portion F2 are alternately arranged in parallel with each other and regularly arranged at a predetermined pitch P. A stacked body W is generated.
　ところで、上下のニップロール４１，４２の直径は互いに相違していてもよい。その場合、ニップロール４１，４２同士の曲率の相違を加味して、コンベヤベルト１１～１４の周速度を設定してもよい。 By the way, the diameters of the upper and lower nip rolls 41 and 42 may be different from each other. In that case, the peripheral speed of the conveyor belts 11 to 14 may be set in consideration of the difference in curvature between the nip rolls 41 and 42.
　また、前記実施例では、周速度の増加減を全て±Δとしたが、＋Δ１，－Δ２のように増加減する絶対値を上下のコンベヤベルトで異ならせてもよいし、上下の一方を一定速にして他方のみを増減させてもよい。 In the above embodiment, the increase / decrease of the peripheral speed is all set to ± Δ, but the absolute values of increase / decrease such as + Δ1, −Δ2 may be different between the upper and lower conveyor belts, and one of the upper and lower sides is constant. Only the other speed may be increased or decreased at high speed.
　また、図２のニップロール４１，４２の軸方向Ｙの両端の全周に弾性部材Ｆに係合する係合部を設けて弾性部材Ｆがニップロールの外周に沿ってスリップすることなく搬送できるようにしてもよい。 In addition, engagement portions that engage with the elastic member F are provided on the entire circumference of both ends in the axial direction Y of the nip rolls 41 and 42 in FIG. 2 so that the elastic member F can be conveyed without slipping along the outer periphery of the nip roll. May be.
　なお、シートＳが１枚である場合などにおいて、弾性部材Ｆが帯状に形成されたものであってもよい。 In addition, when the sheet S is one sheet, the elastic member F may be formed in a band shape.
　また、前記ＪＰ６３－２４３３０９Ａに開示されているように、前記シートＳはテープのように帯状の幅の狭いものであってもよい。この場合、帯状の一対のシート（テープ）で弾性部材Ｆを挟んだ後に、別の幅広のシートで弾性部材Ｆを挟んでもよい。 Further, as disclosed in JP63-243309A, the sheet S may be a belt-like narrow one like a tape. In this case, after the elastic member F is sandwiched between a pair of belt-like sheets (tapes), the elastic member F may be sandwiched between other wide sheets.
　以上のとおり、図面を参照しながら好適な実施例を説明したが、当業者であれば本明細書を見て、自明な範囲で種々の変更および修正を容易に想定するであろう。 As described above, the preferred embodiments have been described with reference to the drawings. However, those skilled in the art will readily consider various changes and modifications within the obvious range by looking at the present specification.
　たとえば、シートＳ，Ｓの一方又は両方が連続シートではなく、不連続シートであってもよい。また、本製造装置が並列に複数組設けられていてもよい。
　また、サイドパネルではなく、いわゆるオムツの吸収性本体等に適用されてもよい。
　また、弾性部材は溶断されて切断されてもよいし、更に、切断される必要もない。
　また、弾性部材の第１部および第２部は互いに平行にされる必要はなく、斜めに傾いたままシートに配置されてもよい。
　また、スピンナに弾性部材の導出部を複数個設け、スピンナから複数本の弾性部材が導出されてもよい。 For example, one or both of the sheets S and S may be discontinuous sheets instead of continuous sheets. Further, a plurality of sets of the present manufacturing apparatus may be provided in parallel.
Moreover, you may apply to the absorptive main body of what is called a diaper instead of a side panel.
Further, the elastic member may be melted and cut, and further, does not need to be cut.
Further, the first part and the second part of the elastic member do not need to be parallel to each other, and may be arranged on the sheet while being inclined obliquely.
Further, a plurality of elastic member lead-out portions may be provided in the spinner, and a plurality of elastic members may be led out from the spinner.
　また、ニップ位置Ｏがコンベヤベルト１Ａ，１Ｂよりも上方または下方に芯ズレしている場合、いずれか一方のニップロールの幅方向Ｙ（図１）の長さは第１組のコンベヤベルト１Ａの外側面から第２組のコンベヤベルト１Ｂの外側面までの長さよりも大きくてもよい。 When the nip position O is misaligned above or below the conveyor belts 1A and 1B, the length in the width direction Y (FIG. 1) of one of the nip rolls is outside the first set of conveyor belts 1A. It may be larger than the length from the side surface to the outer surface of the second set of conveyor belts 1B.
　たとえば、図７に示すように、ニップ位置Ｏが第２および第４コンベヤベルト１２，１４の下面よりも下方に位置している場合、第２ニップロール４２の幅方向Ｙ（図１）の長さは前記両コンベヤベルト１Ａ，１Ｂの外側面同士の間の長さよりも大きくてもよい。この場合、該第２ニップロール４２に供給されるシートＳの幅は前記外側面同士の間の幅よりも大きくてもよい。 For example, as shown in FIG. 7, when the nip position O is positioned below the lower surfaces of the second and fourth conveyor belts 12, 14, the length of the second nip roll 42 in the width direction Y (FIG. 1). May be larger than the length between the outer surfaces of the two conveyor belts 1A, 1B. In this case, the width of the sheet S supplied to the second nip roll 42 may be larger than the width between the outer surfaces.
　更に、前記第２ニップロール４２に供給されるシートＳの幅と同じ幅を有するシートＳを第１ニップロール４１に供給してもよい。すなわち、両コンベヤベルト１Ａ，１Ｂの間の内側の空間に配置された前記第１ニップロール４１に対し、前記両コンベヤベルトの外側面同士の間の幅よりも大きい幅のシートＳが供給されてもよい。一般的に、シートＳは不織布などの柔らかい素材であるため、シートＳが前記外側面同士間の幅よりも大きくても、前記内側の空間に配置された第１ニップロール４１に供給され得る。なお、この場合、前記第１ニップロール４１に供給されるシートＳの搬送方向Ｘに沿った両側縁を供給前に予め折り畳んでもよい。 Furthermore, a sheet S having the same width as that of the sheet S supplied to the second nip roll 42 may be supplied to the first nip roll 41. That is, even if the sheet S having a width larger than the width between the outer surfaces of the two conveyor belts is supplied to the first nip roll 41 disposed in the inner space between the two conveyor belts 1A and 1B. Good. In general, since the sheet S is a soft material such as a non-woven fabric, even if the sheet S is larger than the width between the outer surfaces, the sheet S can be supplied to the first nip roll 41 disposed in the inner space. In this case, both side edges along the conveyance direction X of the sheet S supplied to the first nip roll 41 may be folded in advance before supply.
　したがって、以上のような変更および修正は、請求の範囲から定まる本発明の範囲内のものと解釈される。 Therefore, the above changes and modifications are interpreted as being within the scope of the present invention defined by the claims.
　本発明はシートに線状の弾性部材が複数本配置された伸縮積層体の製造に利用できる。 The present invention can be used for manufacturing a stretchable laminate in which a plurality of linear elastic members are arranged on a sheet.
　１：コンベヤ　１Ａ：第１組のコンベヤベルト　１Ｂ：第２組のコンベヤベルト
　１Ｃ：センタライン　１１～１４：第１～第４コンベヤベルト
　２：スピンナ　２０：本体　２１：中空軸　２２：滑車
　３：駆動装置
　４１，４２：ニップロール
　５：制御装置
　Ｃ：カッタ
　Ｆ：弾性部材　Ｆ１：第１部　Ｆ２：第２部
　Ｍ１：第１モータ　Ｍ２：第２モータ　Ｍ３：第３モータ　Ｍ４：第４モータ
　Ｎ：法線方向（径方向）
　Ｏ：ニップ位置
　Ｒ：周方向
　Ｓ：シート
　Ｔ：接線方向
　Ｘ：搬送方向　Ｙ：幅方向，軸方向　Ｚ：厚さ方向
　Ｗ：伸縮積層体
　                                                                               1: Conveyor 1A: First set of conveyor belts 1B: Second set of conveyor belts 1C: Center line 11-14: First to fourth conveyor belts 2: Spinner 20: Main body 21: Hollow shaft 22: Pulley 3: Drive Device 41, 42: Nip roll 5: Control device C: Cutter F: Elastic member F1: First part F2: Second part M1: First motor M2: Second motor M3: Third motor M4: Fourth motor N: Method Linear direction (radial direction)
O: nip position R: circumferential direction S: sheet T: tangential direction X: transport direction Y: width direction, axial direction Z: thickness direction W: stretchable laminate

Claims (4)

  1. 　少なくとも１枚のシートに前記シートの搬送方向を横切る幅方向に延びる線状の少なくとも１本の弾性部材が配置されて前記幅方向に伸縮する伸縮積層体の製造方法であって、
    　互いに前記幅方向に離間した第１組および第２組のコンベヤベルトと、
    　前記二組のコンベヤベルトにより搬送される前記弾性部材を前記シートに付着させて前記伸縮積層体を形成する第１および第２のニップロールとを用い、
    　前記第１および第２ニップロールのうち少なくとも一方のニップロールが前記二組のコンベヤベルトの間に配置され、
    　前記第１組および第２組のコンベヤベルトは、それぞれ、前記第１ニップロール側に配置された第１および第３のコンベヤベルトを備え、
    　前記第１組および第２組のコンベヤベルトは、それぞれ、前記第２ニップロール側に配置された第２および第４のコンベヤベルトを備え、前記製造方法は、
    　前記二組のコンベヤベルトに張架状態で前記弾性部材を螺旋状に巻回する工程と、
    　前記少なくとも１枚のシートを前記一対のニップロールの間に供給する工程と、
    　前記シートを横切る幅方向に延びた状態の前記少なくとも１本の弾性部材の一部と他部とが前記搬送方向に互いに離間した状態で前記少なくとも１本の弾性部材を前記シートの表面に供給する工程と、
    　前記一対のニップロールにより前記弾性部材の前記一部と前記他部を前記シートに付着させる工程と、
    　前記両ニップロールが前記シートを介して互いに接する、前記シートの厚さ方向のニップ位置に応じて前記第１～第４コンベヤベルトの周速度を設定する工程とを備える。     A method for producing a stretchable laminate in which at least one linear elastic member extending in the width direction crossing the conveying direction of the sheet is disposed on at least one sheet and expands and contracts in the width direction,
    A first set and a second set of conveyor belts spaced apart from each other in the width direction;
    Using the first and second nip rolls that form the stretchable laminate by attaching the elastic member conveyed by the two sets of conveyor belts to the sheet,
    At least one nip roll of the first and second nip rolls is disposed between the two sets of conveyor belts,
    The first set and the second set of conveyor belts respectively include first and third conveyor belts disposed on the first nip roll side,
    Each of the first set and the second set of conveyor belts includes second and fourth conveyor belts arranged on the second nip roll side, and the manufacturing method includes:
    A step of spirally winding the elastic member in a stretched state on the two sets of conveyor belts;
    Supplying the at least one sheet between the pair of nip rolls;
    The at least one elastic member is supplied to the surface of the sheet in a state in which a part and the other part of the at least one elastic member extending in the width direction across the sheet are separated from each other in the transport direction. Process,
    Attaching the part of the elastic member and the other part to the sheet by the pair of nip rolls;
    Setting the peripheral speed of the first to fourth conveyor belts in accordance with the nip position in the thickness direction of the sheet where the both nip rolls contact each other via the sheet.
  2. 　請求項１の方法おいて、前記ニップ位置が第１および第３コンベヤベルトよりも第２および第４コンベヤベルトに近い場合には、第１および第３コンベヤベルトの平均周速度Ｖ１３よりも第２および第４コンベヤベルトの平均周速度Ｖ２４の方が小さい状態で運転され、
    　一方、前記ニップ位置が第２および第４コンベヤベルトよりも第１および第３コンベヤベルトに近い場合には、第１および第３コンベヤベルトの平均周速度Ｖ１３よりも第２および第４コンベヤベルトの平均周速度Ｖ２４の方が大きい状態で運転される。     2. The method of claim 1, wherein when the nip position is closer to the second and fourth conveyor belts than the first and third conveyor belts, the second peripheral speed is greater than the average peripheral speed V13 of the first and third conveyor belts. And the average peripheral speed V24 of the fourth conveyor belt is operated in a smaller state,
    On the other hand, when the nip position is closer to the first and third conveyor belts than the second and fourth conveyor belts, the second and fourth conveyor belts have an average circumferential speed V13 of the first and third conveyor belts. The vehicle is operated with the average peripheral speed V24 being larger.
  3. 　少なくとも１枚のシートに前記シートの搬送方向を横切る幅方向に延びる線状の少なくとも１本の弾性部材が配置されて前記幅方向に伸縮する伸縮積層体の製造装置であって、
    　互いに前記幅方向に離間した第１組および第２組のコンベヤベルトと、
    　前記二組のコンベヤベルトに張架状態で前記弾性部材を螺旋状に巻回するスピンナと、
    　前記張架状態の前記弾性部材を前記コンベヤベルトの搬送方向の下流に向かって搬送するために前記二組のコンベヤベルトを回転させる駆動装置と、
    　前記二組のコンベヤベルトにより搬送される前記弾性部材を前記シートに付着させて前記伸縮積層体を形成する第１および第２のニップロールとを備え、
    　前記第１および第２ニップロールのうち少なくとも一方のニップロールが前記二組のコンベヤベルトの間に配置され、
    　前記第１組および第２組のコンベヤベルトは、それぞれ、前記第１ニップロール側に配置された第１および第３のコンベヤベルトを備え、
    　前記第１組および第２組のコンベヤベルトは、それぞれ、前記第２ニップロール側に配置された第２および第４のコンベヤベルトを備え、
    　ここにおいて、前記両ニップロールが前記シートを介して互いに接する、前記シートの厚さ方向のニップ位置に応じて前記第１～第４コンベヤベルトの周速度を設定する制御装置を備える。     An apparatus for producing a stretchable laminate in which at least one linear elastic member extending in a width direction crossing the conveying direction of the sheet is disposed on at least one sheet and expands and contracts in the width direction,
    A first set and a second set of conveyor belts spaced apart from each other in the width direction;
    A spinner for spirally winding the elastic member in a stretched state on the two sets of conveyor belts;
    A driving device for rotating the two sets of conveyor belts to convey the elastic member in the stretched state toward the downstream in the conveying direction of the conveyor belt;
    First and second nip rolls that form the stretchable laminate by attaching the elastic member conveyed by the two sets of conveyor belts to the sheet;
    At least one nip roll of the first and second nip rolls is disposed between the two sets of conveyor belts,
    The first set and the second set of conveyor belts respectively include first and third conveyor belts disposed on the first nip roll side,
    The first set and the second set of conveyor belts respectively include second and fourth conveyor belts disposed on the second nip roll side,
    Here, a control device is provided for setting the peripheral speeds of the first to fourth conveyor belts in accordance with the nip position in the thickness direction of the sheet where the nip rolls are in contact with each other via the sheet.
  4. 　請求項３の製造装置において、前記制御装置は、
    　前記ニップ位置が第１および第３コンベヤベルトよりも第２および第４コンベヤベルトに近い場合には、第１および第３コンベヤベルトの平均周速度Ｖ１３よりも第２および第４コンベヤベルトの平均周速度Ｖ２４の方が小さい状態で運転されるように前記周速度を設定し、
    　一方、前記ニップ位置が第２および第４コンベヤベルトよりも第１および第３コンベヤベルトに近い場合には、第１および第３コンベヤベルトの平均周速度Ｖ１３よりも第２および第４コンベヤベルトの平均周速度Ｖ２４の方が大きい状態で運転されるように前記周速度を設定する。
    　
    　                                                                                   4. The manufacturing apparatus according to claim 3, wherein the control device includes:
    When the nip position is closer to the second and fourth conveyor belts than the first and third conveyor belts, the average circumference of the second and fourth conveyor belts is greater than the average circumferential speed V13 of the first and third conveyor belts. Set the peripheral speed so that the speed V24 is operated in a smaller state,
    On the other hand, when the nip position is closer to the first and third conveyor belts than the second and fourth conveyor belts, the second and fourth conveyor belts have an average circumferential speed V13 of the first and third conveyor belts. The peripheral speed is set so that the average peripheral speed V24 is operated in a larger state.

PCT/JP2013/072416 2012-08-31 2013-08-22 Stretch layered body fabrication method and device WO2014034520A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011127240A (en) * 2009-12-16 2011-06-30 Oji Nepia Co Ltd Absorptive article, and method and apparatus for producing elastic sheet usable therefor
JP2012120762A (en) * 2010-12-10 2012-06-28 Kao Corp Method for manufacturing stretchable sheet
JP2012120610A (en) * 2010-12-07 2012-06-28 Kao Corp Device for producing stretchable sheet

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011127240A (en) * 2009-12-16 2011-06-30 Oji Nepia Co Ltd Absorptive article, and method and apparatus for producing elastic sheet usable therefor
JP2012120610A (en) * 2010-12-07 2012-06-28 Kao Corp Device for producing stretchable sheet
JP2012120762A (en) * 2010-12-10 2012-06-28 Kao Corp Method for manufacturing stretchable sheet

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