WO2010055843A1 - 吸収性物品の製造方法及び吸収性物品の製造装置 - Google Patents
吸収性物品の製造方法及び吸収性物品の製造装置 Download PDFInfo
- Publication number
- WO2010055843A1 WO2010055843A1 PCT/JP2009/069171 JP2009069171W WO2010055843A1 WO 2010055843 A1 WO2010055843 A1 WO 2010055843A1 JP 2009069171 W JP2009069171 W JP 2009069171W WO 2010055843 A1 WO2010055843 A1 WO 2010055843A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- web
- arm member
- absorbent article
- elastic member
- manufacturing
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B39/00—Layout of apparatus or plants, e.g. modular laminating systems
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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
- A61F13/15609—Apparatus or processes for manufacturing of babies' napkins, e.g. diapers having elastic ribbons fixed thereto; Devices for applying the ribbons the ribbons being applied in an irregular path
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G17/00—Conveyors having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyors in which the chains form the load-carrying surface
- B65G17/30—Details; Auxiliary devices
- B65G17/46—Means for holding or retaining the loads in fixed position on the load-carriers, e.g. magnetic
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
Definitions
- the present invention relates to an absorbent article manufacturing method and an absorbent article manufacturing apparatus in which a thread-like elastic member is arranged in at least a part of a front waistline region, a rear waistline region, and a crotch region in a cross direction that intersects a predetermined direction. .
- the front and rear waist area, the back waist area, and the crotch area of the absorbent article are expanded and contracted.
- a method of disposing a thread-like elastic member (rubber) having properties is widely used.
- elastic members are arranged in a corrugated shape on a web in which constituent parts of the absorbent article such as a back sheet and an absorbent sheet are continuous. That is, by arranging the thread-like elastic member in a waveform on the cross-flow type web arranged along the crossing direction (CD direction) in which the longitudinal direction of the absorbent article intersects the web conveyance direction (MD direction), An absorptive article provided with gathers according to the shape of a crotch region can be manufactured continuously.
- CD direction crossing direction
- MD direction web conveyance direction
- the web is fed at a predetermined cycle while the elastic member is fed from the tip of the arm member directly connected to the rotation shaft of the servo motor.
- a method of swinging in the width direction is known (for example, Patent Document 1). If an arm member directly connected to such a servo motor is used, the servo motor can be rotated at a high speed, and the production speed of the absorbent article is improved.
- the conventional method for manufacturing absorbent articles described above has the following problems. That is, the size of the absorbent article to be manufactured is increased. For example, in the case of a disposable diaper for adults, it is necessary to make the arm member longer than a disposable diaper for infants. There has been a problem that it becomes difficult to rotate the servo motor at a desired speed.
- the present invention has been made in view of such circumstances, and a method for manufacturing an absorbent article that can improve the production speed while reliably reducing breakage of the arm member and can cope with various sizes. And it aims at provision of the manufacturing apparatus of an absorbent article.
- the present invention has the following features.
- the first feature of the present invention is that a crotch region located between a front waistline region (front waistline region 10), a back waistline region (rear waistline region 20), and the front waistline region and the back waistline region.
- a web for example, second web 7B
- a motor having a shaft (rotating shaft 211), an arm member (arm member 220) for guiding the elastic member to a predetermined position in the intersecting direction on the web, the rotating shaft, and the A reduction gear (provided between the base end portion (base end portion 221) of the arm member and decelerating the rotation speed (V 3 ) of the arm member rather than the rotation speed (V 2 ) of the rotation shaft.
- a reduction gear 230 provided between the base end portion (base end portion 221) of the arm member and decelerating the rotation speed (V 3 ) of the arm member rather than the rotation speed (V 2 ) of the rotation shaft.
- an absorbent article manufacturing method and an absorbent article manufacturing apparatus capable of improving the production speed while reliably reducing breakage of an arm member and adapting to various sizes. Can do.
- FIG. 1 is a perspective view showing an absorbent article according to the present embodiment.
- Drawing 2 is a figure for explaining a part of manufacturing method of an absorptive article concerning this embodiment.
- FIG. 3 is a perspective view showing the elastic member mounting apparatus according to the present embodiment.
- FIG. 4 is a top view (a view of arrow A in FIG. 3) showing the elastic member mounting device according to the present embodiment.
- FIG. 5 is a side view (viewed in the direction of arrow B in FIG. 3) showing the elastic member mounting device according to the present embodiment.
- FIG. 6 is a perspective view showing the swing guide mechanism according to the present embodiment.
- FIG. 7 is a side view showing the swing guide mechanism according to the present embodiment.
- FIG. 8 is a perspective view showing a swing guide mechanism 120A according to a modified example.
- FIG. 1 is a perspective view showing an absorbent article according to the present embodiment.
- the absorbent article 1 is a disposable diaper for adults.
- the absorbent article 1 includes a liquid-permeable surface sheet 2 that is in contact with the skin of a wear target (hereinafter referred to as a wearer), a back sheet 3 provided outside the surface sheet 2, and a surface sheet. 2 and the back sheet 3, and is generally constituted by an absorber 4 that absorbs excrement from the wearer.
- a wear target hereinafter referred to as a wearer
- a back sheet 3 provided outside the surface sheet 2
- a surface sheet. 2 and the back sheet 3 and is generally constituted by an absorber 4 that absorbs excrement from the wearer.
- a liquid-impermeable waterproof sheet (not shown) is provided between the back sheet 3 and the absorber 4. That is, the absorber 4 is provided between the top sheet 2 and the waterproof sheet.
- a nonwoven fabric or an open plastic film is used for the top sheet 2.
- a nonwoven fabric is used for the back sheet 3.
- the absorber 4 pulverized pulp, a mixture of pulverized pulp and superabsorbent polymer particles, or the like is used.
- the waterproof sheet plastic, nonwoven fabric, a mixed sheet of a plastic film and nonwoven fabric, or the like is used.
- the absorbent article 1 has a front waistline region 10 corresponding to the wearer's front waistline, a rear waistline region 20 corresponding to the wearer's back waistline, and a crotch region 30 corresponding to the wearer's inseam.
- the front waistline region 10 and the back waistline region 20 are integrated by the joint 40.
- a waist gather 5 made of elastic thread-like rubber or the like is provided at the periphery of the front waistline region 10 and the back waistline region 20, a waist gather 5 made of elastic thread-like rubber or the like is provided.
- the waist gathers 5 are configured by a front waist gather 5a located in the front waistline region 10 and a rear waist gather 5b located in the rear waistline region 20.
- a waistline opening region 50 is formed between the front waist gather 5a and the rear waist gather 5b.
- the front waistline region 10 and the back waistline region 20 have elasticity in the transport direction MD (MD direction) of the first web 7A constituting the top sheet 2 and the second web 7B (see FIG. 2) constituting the back sheet 3. is doing.
- the front waistline region 10 and the back waistline region 20 may have elasticity in the transport direction MD by providing the waist gathers 5, and the front waistline region 10 and the back waistline region 20 themselves have elasticity. It may have elasticity in conveyance direction MD by being formed with a sheet.
- the crotch region 30 is provided between the front waistline region 10 and the back waistline region 20. On both sides of the crotch region 30 are provided leg gathers 6 made of elastic rubber thread or the like.
- the leg gather 6 is configured by a front leg gather 6a located near the front waistline region 10 and a rear leg gather 6b located near the rear waistline region 20.
- Leg opening areas 60 are formed between the front leg gather 6 a and the rear leg gather 6 b and on both sides of the crotch area 30.
- the crotch region 30 has elasticity in the cross direction CD (CD direction) that intersects the conveyance direction MD.
- the crotch region 30 may be stretchable in the cross direction CD by providing the leg gathers 6, and the crotch region 30 itself is formed of a stretchable sheet in the cross direction CD. It may have elasticity.
- Drawing 2 is a figure for explaining a part of manufacturing method of an absorptive article concerning this embodiment.
- the manufacturing method of an absorbent article includes at least a component mounting step, a leg periphery forming step, a folding step, a joining step, and a cutting step.
- the liquid-impermeable 1st web 7A which comprises the surface sheet 2 and the liquid-impermeable 2nd which comprises the back surface sheet 3 with a conveyance apparatus (for example, belt conveyor apparatus) not shown.
- a step of transporting the web 7B and the third web 7C made of the same material as the second web 7B and constituting the back sheet 3 in the transport direction MD (predetermined direction) is included.
- the elastic member 5 ′ constituting the stretched waist gathers 5 is linearly placed at positions corresponding to the front waistline region 10 and the back waistline region 20 in the second web 7B.
- the elastic member 5a ′ constituting the front waist gather 5a and the elastic member 5b ′ constituting the rear waist gather 5b are placed at positions corresponding to the front waistline region 10 and the rear waistline region 20 in the second web 7B.
- the waist gathers 5 (the front waist gathers 5a and the back waist gathers 5b) are formed in the position corresponding to the front waistline area
- the third web 7C is placed on the second web 7B.
- the elastic members 6 ′ constituting the leg gathers 6 in the stretched state are arranged at a position corresponding to the crotch region 30 in the second web 7B and the third web 7C while swinging in the cross direction CD at a predetermined cycle.
- the And the elastic member 6 ' will be in the state pinched
- the second web 7B and the third web 7C with the elastic member 6 'sandwiched between them are pressed by an upper press roll 130A and a lower press roll 130B, which will be described later.
- the elastic member 6a 'constituting the front leg gather 6a and the elastic member 6b' constituting the rear leg gather 6b are a large annular portion 6c and a small annular portion whose size in the intersecting direction CD is smaller than that of the large annular portion 6c. 6d.
- the elastic member 6a ′ ′ is not fixed to the web at the predetermined position. Since the elastic member 6a 'is disposed in an extended state, the elastic member 6a' contracts at a portion that is not fixed to the web, and changes from a predetermined arrangement shape to a substantially linear shape. Thus, the small annular portion 6d is formed.
- the small annular portion 6d can be formed in the same manner.
- the waterproof sheet (not shown) and the absorbent body 4 are placed on the second web 7B and the third web 7C in a state of sandwiching the elastic member 6 ′ so as to be arranged at regular intervals in the transport direction MD.
- the waterproof sheet may be placed on the second web 7B and the third web 7C in a state of being bonded to the absorbent body 4 in advance, and placed on the second web 7B and the third web 7C separately from the absorbent body 4. May be placed.
- the 1st web 7A which comprises the surface sheet 2 overlaps on the 2nd web 7B and the 3rd web 7C in which the component which comprises the absorbent article 1 was mounted.
- the first to fourth orders are not necessarily required and can be changed as appropriate.
- leg circumference forming process S2 In the leg circumference forming process S2, on the second web 7B and the first web 7A (hereinafter referred to as the composite web 7) sandwiching the component parts after the component part process S1, the macro annular portion By cutting off the inner peripheral side of 6c, a leg opening region 60 (so-called leg hole) is formed.
- the predetermined region 40A corresponding to the joining portion 40 of the absorbent article 1 is joined by ultrasonic treatment or heat treatment after the folding step S3.
- the predetermined area 40A indicates both sides of the conveyance direction MD of the virtual line SL indicating the planned cutting position extending in the intersecting direction CD.
- FIG. 3 is a perspective view showing the elastic member mounting apparatus according to the present embodiment.
- FIG. 4 is a top view (a view of arrow A in FIG. 3) showing the elastic member mounting device according to the present embodiment.
- FIG. 5 is a side view (viewed in the direction of arrow B in FIG. 3) showing the elastic member mounting device according to the present embodiment.
- the elastic member mounting apparatus 100 includes the second web 7B and the third web 7C while swinging the elastic member 6 ′ constituting the leg gather 6 in the intersecting direction CD at a predetermined cycle. Place between. That is, the elastic member attachment device 100 arranges the leg gathers 6 (the front leg gather 6a and the rear leg gather 6b) by arranging the elastic member 6 ′ in a curved shape between the second web 7B and the third web 7C. Form.
- the elastic member mounting apparatus 100 includes at least a web feeding mechanism (not shown), a gather feeding mechanism (not shown), an adhesive application mechanism 110, a swing guide mechanism 120 (guide arm portion), and a press roll mechanism 130. Prepare.
- the web feeding mechanism sequentially feeds the web from the original fabric.
- the web feeding mechanism includes an upper web feeding mechanism that sequentially feeds the third web 7C from the third web original fabric 7C ′, and a lower web feeding that sequentially feeds the second web 7B from the second web original fabric 7B ′.
- the gather feeding mechanism sequentially feeds the elastic members 6 ′ constituting the leg gathers 6 from the original fabric.
- the gather feeding mechanism includes a front gather feeding mechanism that sequentially feeds elastic members 6a ′ constituting the front leg gathers 6a from an original fabric (not shown) and an elastic member 6b ′ constituting the rear leg gathers 6b.
- a rear gather feeding mechanism that sequentially feeds from the opposite side (not shown).
- the front gather feeding mechanism and the rear gather feeding mechanism include feed rolls 150A and 150B that rotate about a rotation axis (not shown) along the intersecting direction CD, and a dividing roll that separates the elastic members 6a ′ and 6b ′.
- the leg gathers 6 are sequentially fed out toward the press roll mechanism 130 via 151A and 151B.
- the adhesive application mechanism is a spray-type device that applies an adhesive (for example, a hot melt adhesive) to the web.
- the adhesive application mechanism 110 includes an upper adhesive application mechanism 110A that applies an adhesive to the third web 7C, and a lower adhesive application mechanism 110B that applies an adhesive to the second web 7B. .
- the upper adhesive application mechanism 110A applies an adhesive to the surface excluding the central portion of the third web 7C.
- the lower adhesive application mechanism 110B applies an adhesive to the entire surface of the second web 7B.
- the swing guide mechanism 120 swings the elastic member 6 ′ constituting the leg gather 6 in the intersecting direction CD at a predetermined cycle.
- the swing guide mechanism 120 includes a first swing guide mechanism 200A that swings the elastic member 6a ′ constituting the front leg gather 6a, and a second swing that swings the elastic member 6b ′ constituting the rear leg gather 6b. And a guide mechanism 200B. Details of the swing guide mechanism 120 will be described later.
- the press roll mechanism 130 presses the second web 7B and the third web 7C in a state where the elastic member 6 'is sandwiched between the second web 7B and the third web 7C.
- the press roll mechanism 130 includes an upper press roll 130A in contact with the third web 7C and a lower press roll 130B in contact with the second web 7B.
- the upper press roll 130A rotates around the rotation shaft 131A along the cross direction CD.
- the lower press roll 130B rotates around the rotation axis 131B along the intersecting direction CD.
- the elastic member 6 ′ is guided by the swing guide mechanism 120 to the place where the upper press roll 130 ⁇ / b> A and the lower press roll 130 ⁇ / b> B are closest to each other.
- FIG. 6 is a perspective view showing the swing guide mechanism according to the present embodiment.
- FIG. 7 is a side view showing the swing guide mechanism according to the present embodiment.
- the first swing guide mechanism 200A and the second swing guide mechanism 200B have basically the same configuration except that the length of an arm member 220 described later is different. Therefore, the first swing guide mechanism 200A and the second swing guide mechanism 200B will be collectively described as the swing guide mechanism 120.
- the swing guide mechanism 120 has the elastic member 6 ′ in the cross direction CD between the motor 210 having the rotation shaft 211 and the second web 7B and the third web 7C.
- the arm member 220 guides to a predetermined position, and the speed reducer 230 provided between the rotating shaft 211 and the base end 221 of the arm member 220.
- the motor 210 is a program that allows the elastic member 6 ′ to have a predetermined expansion ratio and arranges the elastic member 6 ′ in a desired layout according to the web conveyance speed (V 1 ). It is comprised by the servomotor which operate
- the program for operating the motor 210 of the first swing guide mechanism 200A is different from the program for operating the motor 210 of the second swing guide mechanism 200B. That is, the predetermined expansion ratio and layout in the front leg gather 6a are different from the predetermined expansion ratio and layout in the rear leg gather 6b.
- the motor 210 is attached to the base plate 213 via the bracket 212 (see FIG. 4).
- the motor 210 is movable on the base plate 213 in the cross direction CD as necessary.
- the arm member 220 has a tapered plate shape from the base end portion 221 to the tip end portion 222.
- the arm member 220 is preferably disposed horizontally (see FIG. 5).
- the arm member 220 is formed using a metal steel plate.
- the arm member 220 is formed using a stainless steel plate.
- the distal end portion 222 of the arm member 220 is bent toward the side opposite to the side where the motor 210 is located with respect to the arm member 220.
- An insertion hole 223 through which the leg gather 6 is inserted is formed at the distal end portion 222 of the arm member 220.
- the length of the arm member 220 is different between the first swing guide mechanism 200A and the second swing guide mechanism 200B.
- the length L2 of the arm member 220 of the second swing guide mechanism 200B is longer than the length L1 of the arm member 220 of the first swing guide mechanism 200A.
- the distance from the press roll mechanism 130 of the front end portion 222 of the first swing guide mechanism 200A and the second swing guide mechanism 200B is equal. Therefore, the relationship between the distance D1 and the distance D2 described above is D2> D1.
- the length L1 of the arm member 220 of the first swing guide mechanism 200A is 450 mm (see FIGS. 5 to 7).
- the length L2 of the arm member 220 of the second swing guide mechanism 200B is 600 mm (see FIGS. 5 to 7).
- the length of the arm member 220 is the length from the distal end portion 222 of the arm member 220 to the rotating shaft of the arm member 220.
- the weight of the arm member 220 of the first swing guide mechanism 200A is 300 g.
- the weight of the arm member 220 of the second swing guide mechanism 200B is 400 g.
- the amplitude SW1 along the cross direction CD of the distal end portion 222 of the arm member 220 of the first swing guide mechanism 200A is 200 mm (see FIGS. 4 and 6).
- the amplitude SW2 along the intersecting direction CD of the distal end portion 222 of the arm member 220 of the second swing guide mechanism 200B is 350 mm (see FIGS. 4 and 6).
- the reducer 230 decelerates the rotation speed (V 3 ) of the arm member 220 rather than the rotation speed (V 2 ) of the rotation shaft 211 of the motor 210.
- the speed reducer 230 is configured such that the rotation speed (V 3 ) of the distal end portion 222 of the arm member 220 from which the leg gathers 6 are fed out with respect to the rotation speed (V 2 ) of the rotation shaft 211 of the motor 210. Is reduced to 1 / S. S is 1 to 8, and is a natural number.
- the reduction gear 230 is constituted by a planetary gear mechanism (so-called planetary gear structure). That is, as shown in FIG. 7, the speed reducer 230 includes a sun gear 231 positioned at the center and a plurality of planetary gears 232 that revolve around the sun gear 231 and rotate.
- the reduction gear 230 is directly connected to the rotating shaft 211 of the motor 210 and the base end 221 of the arm member 220, respectively.
- the sun gear 231 is directly connected to the rotation shaft 211 of the motor 210.
- the central axis of the plate 232 b connected to the rotation shaft 232 a of the plurality of planetary gears 232 (that is, the revolution axis of the planetary gear 232) is directly connected to the base end portion 221 of the arm member 220. That is, the rotation shaft 233 of the speed reducer 230 (that is, the revolution shaft of the planetary gear 232) and the rotation shaft 211 of the motor 210 are located on the same axis.
- the third web 7C is fed from the third web original fabric 7C 'by the upper web feeding mechanism, and the traveling direction is changed by the roller 140A.
- An adhesive is applied to the surface of the third web 7C, whose traveling direction is changed, facing the second web 7B by the upper adhesive application mechanism 110A.
- the upper adhesive application mechanism 110A applies the adhesive to the surface excluding the central portion of the third web 7C.
- the third web 7C to which the adhesive is applied is supplied from above between the upper press roll 130A and the lower press roll 130B.
- the second web 7B is fed from the second web original fabric 7B 'by the lower web feeding mechanism, and the traveling direction is changed by the roller 140B.
- An adhesive is applied to the surface of the second web 7B, whose traveling direction has been changed, facing the third web 7C by the lower adhesive application mechanism 110B.
- the second web 7B coated with the adhesive is supplied from below between the upper press roll 130A and the lower press roll 130B.
- the elastic member 6a ' is fed out from the original fabric (not shown) by the front gather feeding mechanism, and the traveling direction is turned by the feed roll 150A.
- the elastic member 6a 'rotated by the feed roll 150A is split by the splitting roll 151A.
- the separated elastic member 6a ' is swung in the cross direction CD at a predetermined cycle by the first swing guide mechanism 200A. Accordingly, the elastic member 6a 'is disposed in a curved shape between the second web 7B and the third web 7C, thereby forming the front leg gather 6a.
- the elastic member 6b ' is fed out from the original fabric (not shown) by the rear gather feeding mechanism, and the traveling direction is turned by the feed roll 150B.
- the elastic member 6b 'rotated by the feed roll 150B is divided by the dividing roll 151B.
- the elastic member 6a ′ and the elastic member 6b ′ are pressed by the upper press roll 130A and the lower press roll 130B while being sandwiched between the second web 7B and the third web 7C to which the adhesive is applied. The For this reason, the elastic member 6a ′ and the elastic member 6b ′ are bonded between the second web 7B and the third web 7C while being swung by the swing guide mechanism 120. It is formed. On the other hand, even if the elastic member 6a ′ and the elastic member 6b ′ are disposed between the second web 7B and the third web 7C, the adhesive is not applied to the central portion of the third web 7C, so the elastic member 6a. A restoring force is generated in 'and the elastic member 6b' to form a small annular portion 6d.
- the swing guide mechanism 120 decelerates the rotation speed (V 3 ) of the arm member 220 more than the rotation speed (V 2 ) of the rotation shaft 211 of the motor 210.
- Machine 230 decelerates the rotation speed (V 3 ) of the arm member 220 more than the rotation speed (V 2 ) of the rotation shaft 211 of the motor 210.
- the motor 210 can be rotated at a desired speed, and the production speed can be improved.
- the motor 210 can rotate an arm member used when manufacturing a disposable diaper for infants at a high speed, and a long arm member 220 used when manufacturing a disposable diaper for adults is also used. It can be used and can handle various sizes.
- a motor that does not have the speed reducer 230 with the same specifications as the motor 210 increases the moment of inertia of the arm member 220 applied to the motor 210 when the arm member increases in weight as the arm member becomes longer and the weight of the arm member increases. It will pass. For this reason, the motor cannot accurately follow the prescribed movement of the arm member, and it becomes difficult to control the arm member that rotates at high speed. Further, with the motor, it is difficult to arrange the leg gathers 6 in a desired curved shape.
- the motor 210 having the same specifications as the above motor is provided with a reduction gear even if it rotates at high speed when the weight of the arm member 220 increases as the arm member 220 becomes longer.
- the rotation speed (V 3 ) of the distal end portion 222 of the arm member 220 where the leg gathers 6 are fed out is decelerated with respect to the rotation speed (V 2 ) of the rotation shaft 211 of the motor 210.
- the motor 210 reduces the moment of inertia of the arm member 220 applied to the rotating shaft 211 of the motor 210 as compared with a motor that does not include the speed reducer 230. Therefore, the motor 210 can accurately follow the prescribed movement of the arm member 220, can control the arm member 220 rotating at high speed more reliably, and can easily arrange the leg gathers 6 in a desired curved shape.
- the reduction gear 230 relative rotation speed of the rotation shaft 211 of the motor 210 (V 2), rotation speed (V 3 of the distal end 222 of the arm member 220 leg gather 6 is fed ) To 1 / S.
- S is 1 to 8, and is a natural number.
- the rotation shaft 233 of the speed reducer 230 (that is, the revolution shaft of the planetary gear 232) and the rotation shaft 211 of the motor 210 are located on the same axis.
- the rigidity of the rotating shaft 211 of the motor 210 is securable. Therefore, even when a heavy arm member 220 is used, the motor 210 easily rotates the arm member 220 at a high speed (that is, it is easy to repeat the reciprocating swivel movement of the arm member 220). The production speed can be further improved.
- the arm member 220 is formed using a metal steel plate.
- the metal steel plate of the weight which was not able to be used with the non-reduction gear motor can be used for the motor 210 which can reduce the inertia moment of the arm member 220 with a reduction gear.
- the strength of the arm member 220 is improved as compared with the arm member formed of carbon fiber, and the durability of the arm member 220 is improved.
- the arm member 220 according to the embodiment described above may be modified as follows.
- symbol is attached
- the swing guide mechanism 120 has a plate shape.
- the swing guide mechanism 120A according to the modified example has a plate shape in which a plurality of circular holes 225 are formed.
- FIG. 8 is a perspective view showing a swing guide mechanism 120A according to a modified example.
- the arm member 220 ⁇ / b> A constituting the swing guide mechanism 120 ⁇ / b> A has a tapered plate shape from the base end portion 221 to the tip end portion 222.
- a plurality of circular holes 225 are provided in the arm member 220A.
- the outer edge 226 in the short direction of the arm member 220 ⁇ / b> A is bent toward the side where the motor 210 is positioned with respect to the arm member 220.
- a material that is heavier than carbon fiber or the like for example, a stainless steel plate
- the increase in the weight of the arm member 220A can be reduced.
- the strength of the arm member 220A is improved as compared with the case where the outer edge 226 is not bent.
- the arm member 220A is provided with a plurality of circular holes 225 and the outer edge of the arm member 220A is bent, the invention is not limited to this, and either one is formed. Of course.
- the circular holes 225 have been described as having a circular shape. However, the circular holes 225 are not limited to this, and may be, for example, a polygonal shape such as a triangular shape or a quadrangular shape. Also, the number and the like are not particularly limited and can be appropriately selected according to the purpose.
- the outer edge of the arm member 220 ⁇ / b> A has been described as being bent to the side where the motor 210 is positioned with respect to the arm member 220.
- the present invention is not limited to this, and the motor 210 is not limited to the arm member 220. It may be bent toward the opposite side of the side where is located.
- the embodiment of the present invention can be modified as follows.
- the manufacturing method of the absorbent article and the elastic member mounting apparatus are not limited to the absorbent article 1 (so-called disposable diaper) including the front waistline region 10, the rear waistline region 20, the crotch region 30, and the like. It can be applied to various articles such as disposable gowns for sports and disposable wear for sports.
- the elastic member of the component part which comprises the absorbent article 1 was demonstrated as what was formed with the elastic thread-like rubber
- the first swing guide mechanism 200A and the second swing guide mechanism 200B have been described as having different lengths of the arm member 220. However, the length is not limited to this, and the same length may be used. Good.
- the program for operating the motor 210 of the first swing guide mechanism 200A has been described as being different from the program for operating the motor 210 of the second swing guide mechanism 200B.
- the program is not limited to this.
- the program for operating the motor 210 of the two swing guide mechanism 200B may be the same. That is, the predetermined expansion ratio and layout in the front leg gather 6a may be the same as the predetermined expansion ratio and layout in the rear leg gather 6b.
- the arm member 220 has been described as being formed using a stainless steel plate, but is not limited thereto, for example, carbon fibers, synthetic fibers such as polyamide fibers, metal fibers such as titanium fibers, It may be formed using a composite material of glass fiber, semi-synthetic fiber, natural fiber, etc., and thermoplastic synthetic resin or thermosetting synthetic resin.
- the speed reducer 230 was demonstrated as what was comprised by the planetary gear mechanism (what is called a planetary gear structure), it is not limited to this, The rotational speed of the rotating shaft 211 of the motor 210 ( Any configuration can be used as long as the rotation speed (V 3 ) of the arm member 220 can be reduced more than V 2 ).
- examples of the reducer 230 include a worm gear reducer and a roller gear reducer.
- speed reducer 230 has been described as being directly connected to the rotating shaft 211 of the motor 210 and the base end portion 221 of the arm member 220, the present invention is not limited to this, and the rotating shaft of the motor 210 is not limited thereto. 211 or the base end 221 of the arm member 220 may be indirectly joined.
- the rotation shaft 233 of the speed reducer 230 (that is, the rotation shaft of the sun gear 231) has been described as being coaxial with the rotation shaft 211 of the motor 210, but is not limited thereto.
- the motor 210 may be arranged so as to be shifted from the rotation shaft 211 of the motor 210.
- the method for manufacturing an absorbent article according to the present invention can improve the production speed while reliably reducing breakage of the arm member, and can cope with various sizes, such as disposable diapers for adults. It is useful in the manufacturing method.
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Abstract
Description
まず、本実施形態に係る吸収性物品の構成について、図面を参照しながら説明する。図1は、本実施形態に係る吸収性物品を示す斜視図である。本実施形態では、吸収性物品1は、大人用の使い捨ておむつである。
次に、本実施形態に係る吸収性物品の製造方法の構成について、図面を参照しながら説明する。図2は、本実施形態に係る吸収性物品の製造方法の一部を説明するための図である。
構成部品載置工程S1では、第2ウェブ7B上に、弾性部材、第3ウェブ7C、防水シート(不図示)、吸収体4、第1ウェブ7Aなどの吸収性物品1を構成する構成部品が載置される。
脚周り形成工程S2では、構成部品工程S1の後に、構成部品を挟んだ第2ウェブ7B及び第1ウェブ7A(以下、複合ウェブ7)上において、大環状部6cの内周側が切り取られることによって、脚周り開口領域60(いわゆる、レッグホール)が形成される。
折り工程S3では、脚周り形成工程S2の後に、複合ウェブ7に対する交差方向CD中心を通り、かつ搬送方向MDに向かう中心線CLに沿って、複合ウェブ7が2つに折られる。つまり、前胴回り領域10に対応する複合ウェブ7の側縁10Aと、後胴回り領域20に対応する複合ウェブ7の側縁20Aとが一致した状態で重ねられる。
接合工程S4では、折り工程S3の後に、超音波処理や加熱処理によって、吸収性物品1の接合部40に対応する所定領域40Aが接合される。なお、所定領域40Aは、交差方向CDに延びる切断予定位置を示す仮想線SLの搬送方向MD両側を示す。
切断工程S5では、接合工程S4の後に、所定領域40Aが接合された複合ウェブ7が仮想線SLに沿って切断される。これにより、吸収性物品1が形成される。
次に、上述した構成部品載置工程において使用される弾性部材取付装置(吸収性物品の製造装置)の構成について、図面を参照しながら説明する。図3は、本実施形態に係る弾性部材取付装置を示す斜視図である。図4は、本実施形態に係る弾性部材取付装置を示す上面図(図3のA矢視図)である。図5は、本実施形態に係る弾性部材取付装置を示す側面図(図3のB矢視図)である。
ウェブ繰出機構は、ウェブを原反から順次繰り出す。具体的には、ウェブ繰出機構は、第3ウェブ7Cを第3ウェブ原反7C’から順次繰り出す上側ウェブ繰出機構と、第2ウェブ7Bを第2ウェブ原反7B’から順次繰り出す下側ウェブ繰出機構とを有する。
ギャザー繰出機構は、レッグギャザー6を構成する弾性部材6’を原反から順次繰り出す。具体的には、ギャザー繰出機構は、前方レッグギャザー6aを構成する弾性部材6a’を原反(不図示)から順次繰り出す前方ギャザー繰出機構と、後方レッグギャザー6bを構成する弾性部材6b’を原反(不図示)から順次繰り出す後方ギャザー繰出機構とを有する。
接着剤塗布機構は、ウェブに接着剤(例えば、ホットメルト接着剤)を塗布するスプレー式の装置である。具体的には、接着剤塗布機構110は、第3ウェブ7Cに接着剤を塗布する上側接着剤塗布機構110Aと、第2ウェブ7Bに接着剤を塗布する下側接着剤塗布機構110Bとを有する。
揺動案内機構120は、レッグギャザー6を構成する弾性部材6’を所定の周期で交差方向CDに揺動させる。揺動案内機構120は、前方レッグギャザー6aを構成する弾性部材6a’を揺動させる第1揺動案内機構200Aと、後方レッグギャザー6bを構成する弾性部材6b’を揺動させる第2揺動案内機構200Bとを有する。なお、揺動案内機構120の詳細については、後述する。
プレスロール機構130は、第2ウェブ7Bと第3ウェブ7Cとの間に弾性部材6’が挟まれた状態で、第2ウェブ7B及び第3ウェブ7Cを押圧する。具体的には、プレスロール機構130は、第3ウェブ7Cと接する上側プレスロール130Aと、第2ウェブ7Bと接する下側プレスロール130Bとを有する。
次に、本発明の特徴である揺動案内機構120の構成について、図3~図8を参照しながら説明する。なお、図6は、本実施形態に係る揺動案内機構を示す斜視図である。図7は、本実施形態に係る揺動案内機構を示す側面図である。
モータ210は、ウェブの搬送速度(V1)に応じて、弾性部材6’に所定の伸張倍率を持たせるとともに、弾性部材6’を所望のレイアウトに配置できるプログラムが入力されたコントローラによって作動するサーボモータによって構成される。
アーム部材220は、基端部221から先端部222にかけて先細の板状をなしている。アーム部材220は、水平に配置されることが好ましい(図5参照)。
減速機230は、モータ210の回動軸211の回動速度(V2)よりもアーム部材220の回動速度(V3)を減速させる。具体的には、減速機230は、モータ210の回動軸211の回動速度(V2)に対して、レッグギャザー6が繰り出されるアーム部材220の先端部222の回動速度(V3)を1/Sに減速させる。なお、Sは、1乃至8であり、自然数である。
次に、本実施形態に係る弾性部材取付装置100の動作について、図3~図5を参照しながら説明する。
実施形態によれば、揺動案内機構120(案内アーム部)は、モータ210の回動軸211の回動速度(V2)よりもアーム部材220の回動速度(V3)を減速させる減速機230を有する。これにより、アーム部材220が長くなることに伴って、アーム部材220の重量が増大した場合であっても、モータ210に掛かるアーム部材220の慣性モーメントが低減する。このため、モータ210の応答性を制限することなく、アーム部材220の破損を確実に軽減する。従って、所望の速度でモータ210を回転させることができ、生産速度の向上を図ることができる。また、モータ210は、乳幼児用の使いすておむつを製造する際に用いられるアーム部材を高速で回転させることができることは勿論、大人用の使い捨ておむつを製造する際に用いられる長いアーム部材220も使用することができ、多様なサイズに対応できる。
上述した実施形態に係るアーム部材220は、以下のように変更してもよい。なお、上述した実施形態に係る揺動案内機構120と同一部分には同一の符号を付して、相違する部分を主として説明する。
上述したように、本発明の実施形態を通じて本発明の内容を開示したが、この開示の一部をなす論述及び図面は、本発明を限定するものであると理解すべきではない。この開示から当業者には様々な代替実施の形態、実施例及び運用技術が明らかとなろう。
Claims (10)
- 前胴回り領域と、後胴回り領域と、前記前胴回り領域及び前記後胴回り領域との間に位置する股下領域とを備え、前記前胴回り領域、前記後胴回り領域及び前記股下領域の少なくとも一部に、所定方向に交差する交差方向に弾性部材が配置される吸収性物品の製造方法であって、
前記吸収性物品の一部を構成する構成部品が連続したウェブを前記所定方向に搬送する工程と、
前記弾性部材を案内する案内アーム部を用いて、前記所定方向に搬送されている前記ウェブと交差する前記交差方向に前記弾性部材を所定の周期で揺動させる工程と、
一対のプレスロールを用いて、前記弾性部材が配置された前記ウェブを押圧する工程と
を含み、
前記案内アーム部は、
回動軸を有するモータと、
前記ウェブ上において、前記弾性部材を前記交差方向における所定の位置に案内するアーム部材と、
前記回動軸と前記アーム部材の基端部との間に設けられ、前記回動軸の回動速度よりも前記アーム部材の回動速度を減速させる減速機とを有する吸収性物品の製造方法。 - 前記モータの回動軸の回動速度に対して、前記弾性部材が繰り出される前記アーム部材の先端部の回動速度は、前記減速機によって1/Sに減速され、
前記Sは、1乃至8である請求項1に記載の吸収性物品の製造方法。 - 前記Sは、自然数である請求項2に記載の吸収性物品の製造方法。
- 前記減速機は、前記モータの回動軸及び前記アーム部材の基端部にそれぞれ直接連結される請求項1乃至3の何れか一項に記載の吸収性物品の製造方法。
- 前記減速機の回動軸と前記モータの回動軸とは、同軸上に位置する請求項1乃至4の何れか一項に記載の吸収性物品の製造方法。
- 前記アーム部材の長さは、450mm~700mmである請求項1に記載の吸収性物品の製造方法。
- 前記アーム部材の重さは、150g~500gである請求項1に記載の吸収性物品の製造方法。
- 前記アーム部材の先端部の前記交差方向に沿った振幅は、150mm~420mmである請求項1に記載の吸収性物品の製造方法。
- 前記アーム部材は、金属鋼板を用いて形成される請求項1に記載の吸収性物品の製造方法。
- 前胴回り領域と、後胴回り領域と、前記前胴回り領域及び前記後胴回り領域との間に位置する股下領域とを備える吸収性物品の一部を構成する構成部品が連続したウェブ上において、糸状の弾性部材を案内する前記案内アーム部を有する吸収性物品の製造装置であって、
前記案内アーム部は、
回動軸を有するモータと、
前記ウェブ上において、前記弾性部材を前記交差方向における所定の位置に案内するアーム部材と、
前記回動軸と前記アーム部材の基端部との間に設けられ、前記回動軸の回動速度よりも前記アーム部材の回動速度を減速させる減速機とを有する吸収性物品の製造装置。
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AU2009314972A AU2009314972B2 (en) | 2008-11-11 | 2009-11-11 | Manufacturing method of absorbent article and manufacturing apparatus of absorbent article. |
CN2009801450188A CN102209512B (zh) | 2008-11-11 | 2009-11-11 | 吸收性物品的制造方法以及吸收性物品的制造装置 |
KR1020117013091A KR101478399B1 (ko) | 2008-11-11 | 2009-11-11 | 흡수성 물품의 제조 방법 및 흡수성 물품의 제조 장치 |
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- 2009-11-10 AR ARP090104336A patent/AR074102A1/es unknown
- 2009-11-11 EP EP09826090.4A patent/EP2356959B1/en not_active Not-in-force
- 2009-11-11 EA EA201100776A patent/EA020074B1/ru not_active IP Right Cessation
- 2009-11-11 CN CN2009801450188A patent/CN102209512B/zh active Active
- 2009-11-11 WO PCT/JP2009/069171 patent/WO2010055843A1/ja active Application Filing
- 2009-11-11 KR KR1020117013091A patent/KR101478399B1/ko active IP Right Grant
- 2009-11-11 AU AU2009314972A patent/AU2009314972B2/en not_active Ceased
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Also Published As
Publication number | Publication date |
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KR20110081357A (ko) | 2011-07-13 |
EP2356959A4 (en) | 2013-01-09 |
KR101478399B1 (ko) | 2014-12-31 |
US8147636B2 (en) | 2012-04-03 |
JP5442982B2 (ja) | 2014-03-19 |
JP2010115284A (ja) | 2010-05-27 |
EP2356959A1 (en) | 2011-08-17 |
CN102209512B (zh) | 2013-09-25 |
AU2009314972B2 (en) | 2015-05-07 |
AR074102A1 (es) | 2010-12-22 |
EA201100776A1 (ru) | 2011-12-30 |
EP2356959B1 (en) | 2018-08-15 |
US20100078127A1 (en) | 2010-04-01 |
EA020074B1 (ru) | 2014-08-29 |
AU2009314972A1 (en) | 2011-07-07 |
CN102209512A (zh) | 2011-10-05 |
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