CN110913813A - Method for manufacturing absorbent article and apparatus for manufacturing absorbent article - Google Patents

Method for manufacturing absorbent article and apparatus for manufacturing absorbent article Download PDF

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Publication number
CN110913813A
CN110913813A CN201880045619.0A CN201880045619A CN110913813A CN 110913813 A CN110913813 A CN 110913813A CN 201880045619 A CN201880045619 A CN 201880045619A CN 110913813 A CN110913813 A CN 110913813A
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Prior art keywords
absorbent article
manufacturing
processing
unit
angle
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CN201880045619.0A
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CN110913813B (en
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铃木裕一
佐伯达也
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Unicharm Corp
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Unicharm Corp
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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

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

A method for manufacturing an absorbent article, characterized in that, by a manufacturing method comprising a reference setting step of setting a rotation reference position around a predetermined rotation axis, a transport step of transporting a material in a transport direction, a 1 st (2 nd) processing step of performing 1 st (2 nd) processing at a 1 st (2 nd) position, a 1 st (2 nd) motor rotation position corresponding to a 1 st (2 nd) angle position after rotating around the predetermined rotation axis at a 1 st (2 nd) rotation angle from the 1 st (2 nd) rotation angle, an angle adjustment step of adjusting the 2 nd angle position so that the 1 st processing position and the 2 nd processing position are in a predetermined positional relationship, the storing step stores the information capable of specifying the relative angle between the 1 st angular position and the adjusted 2 nd angular position after the angle adjusting step.

Description

Method for manufacturing absorbent article and apparatus for manufacturing absorbent article
Technical Field
The present invention relates to a method for manufacturing an absorbent article and an absorbent article manufacturing apparatus.
Background
In the assembly line of absorbent articles, various processes such as cutting, pressing, and attaching are performed on the conveyed raw materials (Japanese: resources) of the absorbent articles. The various processes above need to be matched to the specifications of the size and shape of the article to be manufactured. Therefore, when the specifications of the product to be manufactured are changed, it is necessary to change the absorbent article manufacturing apparatus for manufacturing the absorbent article (setup change (japanese paragraph え)).
Conventionally, the machine setup of an absorbent article manufacturing apparatus is performed by replacing a processing unit in accordance with the product specification (see patent document 1).
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2007-44349
Disclosure of Invention
Problems to be solved by the invention
However, in the conventional method of performing setup change adjustment of the absorbent article manufacturing apparatus by replacing the processing unit, when the setup change is performed from the specification of one product to the specification of another product and then the product is returned to the specification of the one product (hereinafter, such setup change is referred to as "return setup change" for convenience), it takes a long time and productivity is deteriorated.
The present invention has been made in view of the above-described problems, and an object thereof is to perform quick return setup adjustment.
Means for solving the problems
The main invention for achieving the above object is a method for manufacturing an absorbent article, characterized in that,
an absorbent article is manufactured by a manufacturing method including a reference setting step, a conveying step, a 1 st processing step, a 2 nd processing step, an angle adjusting step, and a storing step,
the reference setting step sets a reference position of rotation about a predetermined rotation axis,
the conveying process conveys a raw material of an absorbent article in a conveying direction in a state where tension is applied in order to manufacture the absorbent article,
the 1 st processing step performs the 1 st processing on the raw material at a 1 st position in the conveying direction using a 1 st processing unit that is rotated about a 1 st rotation axis by a 1 st motor, at a 1 st rotation position of the 1 st motor corresponding to a 1 st angular position after being rotated about the predetermined rotation axis by a 1 st rotation angle from the rotation reference position,
the 2 nd processing step performs the 2 nd processing on the raw material at a 2 nd position in the conveying direction using a 2 nd processing portion rotated by a 2 nd motor around a 2 nd rotation axis at a 2 nd angular position after being rotated by a 2 nd rotation angle from the rotation reference position around the predetermined rotation axis,
the angle adjusting step adjusts the 2 nd angular position so that the part of the material subjected to the 1 st processing and the part subjected to the 2 nd processing, from which the tension is released, have a predetermined positional relationship,
the storing step stores information that can specify a relative angle between the 1 st angular position and the adjusted 2 nd angular position after the angle adjusting step,
the method for manufacturing an absorbent article manufactures another absorbent article after manufacturing the one absorbent article,
after the other absorbent article is manufactured, the 2 nd angular position is set using the information when the one absorbent article is manufactured again.
Other features of the present invention will be apparent from the description of the specification and drawings.
Effects of the invention
By adopting the invention, the quick return production change adjustment can be carried out.
Drawings
Fig. 1 is a schematic diagram showing an example of an assembly line of an absorbent article manufacturing apparatus 1.
Fig. 2 is a schematic diagram showing a machining unit 10 that performs machining by a pair of upper and lower rotating bodies.
Fig. 3 is a diagram showing a relationship between the control unit 50 and another device.
FIG. 4 is a view showing the tip plate 20 with the replacement part of the processing unit 10 processed by the pair of upper and lower rotating bodies removed.
Fig. 5 is an explanatory diagram for explaining the order of return setup.
Fig. 6 is a side sectional view of the processing unit 10 according to the second embodiment, and fig. 6 is a bottom view showing 3 kinds of sectional shapes at the fitting portion of the upper roller rotating shaft 12U according to the second embodiment.
Fig. 7 is a side sectional view of the processing unit 10 of the third embodiment.
Fig. 8 is a diagram showing a positioning portion on a conveying path of the rotating body processing unit.
Detailed Description
At least the following matters will be clear from the description of the present specification and the accompanying drawings.
A method for manufacturing an absorbent article, characterized in that,
an absorbent article is manufactured by a manufacturing method including a reference setting step, a conveying step, a 1 st processing step, a 2 nd processing step, an angle adjusting step, and a storing step,
the reference setting step sets a reference position of rotation about a predetermined rotation axis,
the conveying step conveys a raw material of an absorbent article in a state of tension applied thereto in a conveying direction in order to manufacture the absorbent article,
the 1 st processing step performs the 1 st processing on the raw material at a 1 st position in the conveying direction by using a 1 st processing unit that is rotated about a 1 st rotation axis by a 1 st motor, at a 1 st rotation position of the 1 st motor corresponding to a 1 st angular position after being rotated about the predetermined rotation axis by a 1 st rotation angle from the rotation reference position,
the 2 nd processing step performs the 2 nd processing on the raw material at a 2 nd position in the conveying direction by using a 2 nd processing portion rotated by a 2 nd motor around a 2 nd rotation axis at a 2 nd angular position after rotating around the predetermined rotation axis at a 2 nd rotation angle from the rotation reference position,
the angle adjusting step adjusts the 2 nd angular position so that a portion of the material subjected to the 1 st processing and a portion subjected to the 2 nd processing, from which the tension is released, have a predetermined positional relationship,
the storing step stores information that can specify a relative angle between the 1 st angular position and the adjusted 2 nd angular position after the angle adjusting step,
the method for manufacturing the absorbent article manufactures another absorbent article after manufacturing the one absorbent article,
after the other absorbent article is manufactured, the 2 nd angular position is set using the information when the one absorbent article is manufactured again.
With the method for manufacturing an absorbent article as described above, quick return setup can be performed.
In addition to the method for manufacturing the absorbent article, it is preferable that,
after the other absorbent article is manufactured, the encoder provided in the 1 st motor and the encoder provided in the 2 nd motor are energized before the one absorbent article is manufactured again.
With the method for manufacturing an absorbent article described above, the rotation angle of each motor can be detected by the control unit before and after the setup change.
In addition to the method for producing the absorbent article, it is preferable that
In the storing step, the angular positions of the 1 st motor and the 2 nd motor at the time of storing the information are stored,
the method of manufacturing an absorbent article includes a restricting step of restricting the 1 st motor and the 2 nd motor from rotating when the encoder provided in the 1 st motor and the encoder provided in the 2 nd motor are not energized.
With the above-described method for manufacturing an absorbent article, even when the encoder is in the non-energized state during the setup change and the control unit cannot detect the rotation angle of the motor, the control unit can detect the rotation angle of the motor when the encoder is in the energized state again.
In addition to the method for manufacturing the absorbent article, it is preferable that,
after the one absorbent article is manufactured, another processing part is used in place of the 2 nd processing part when the other absorbent article is manufactured,
when the one absorbent article is manufactured again after the other absorbent article is manufactured, the 2 nd processing unit is reused in place of the other processing unit.
With the method of manufacturing an absorbent article as described above, the state in which the encoder is energized can be easily realized before and after the return to the setup change.
In addition to the method for manufacturing the absorbent article, it is preferable that,
the method for manufacturing an absorbent article further includes a tension adjusting step of adjusting tension applied to the material of the absorbent article,
the angle adjusting step is performed after the tension adjusting step.
In the method of manufacturing an absorbent article as described above, since the angle adjustment step is executed at an appropriate timing, more accurate information can be stored in the storage unit when the subsequent storage step is executed, and quick return setup adjustment can be performed.
In addition to the method for manufacturing the absorbent article, it is preferable that,
the method for manufacturing an absorbent article further comprises a speed adjustment step of adjusting the conveyance speed of the raw material,
the angle adjusting step is performed after the speed adjusting step.
In the method of manufacturing an absorbent article as described above, since the angle adjustment step is executed at an appropriate timing, more accurate information can be stored in the storage unit when the subsequent storage step is executed, and quick return setup adjustment can be performed.
In addition to the method for manufacturing the absorbent article, it is preferable that,
in the conveying step, the raw material continuously fed from the raw material roll is conveyed,
the method for manufacturing the absorbent article comprises a replacing step of replacing the raw material roll with a new raw material roll,
the angle adjusting process is performed after the replacing process.
In the method of manufacturing an absorbent article as described above, since the angle adjustment step is executed at an appropriate timing, more accurate information can be stored in the storage unit when the subsequent storage step is executed, and quick return setup adjustment can be performed.
In addition to the method for manufacturing the absorbent article, it is preferable that,
the 2 nd processing unit including the 2 nd processing unit includes a heating unit,
the method for manufacturing an absorbent article further includes a temperature adjustment step of adjusting the heating temperature of the heating unit,
the adjusted heating temperature is stored in the storage step,
when the absorbent article is manufactured again after the other absorbent article is manufactured, the heating unit heats the absorbent article at the stored heating temperature.
With the method for manufacturing an absorbent article as described above, the temperature of the heating unit can be quickly adjusted at the time of return setup, and further quick return setup can be performed.
In addition to the method for manufacturing the absorbent article, it is preferable that,
the 2 nd processing unit having the 2 nd processing unit includes a pressing portion,
the method of manufacturing an absorbent article further includes a pressurizing force adjusting step of adjusting the pressurizing force of the pressurizing portion,
the adjusted pressurizing force is stored in the storing step,
after the other absorbent article is manufactured, the pressing portion presses the other absorbent article with the stored pressing force when the one absorbent article is manufactured again.
With the above-described method of manufacturing an absorbent article, the pressing force adjustment of the pressing portion can be performed quickly at the time of the return setup, and further quick return setup can be performed.
In addition to the method for manufacturing the absorbent article, it is preferable that,
the method for manufacturing an absorbent article further includes a 3 rd processing step of applying an adhesive to the raw material at a 3 rd position in the transport direction by a 3 rd processing unit at a timing after the raw material is rotated at a 3 rd rotation angle around the predetermined rotation axis from the rotation reference position,
the method for manufacturing an absorbent article further includes another angle adjustment step of adjusting a 3 rd angular position so that a portion of the raw material subjected to the 1 st processing and a portion to which the adhesive is applied have a predetermined positional relationship,
the information includes information that can specify a relative angle between the 1 st angular position and the adjusted 3 rd angular position,
after the other absorbent article is manufactured, when the one absorbent article is manufactured again, the 3 rd angular position is set using information that can specify the relative angle between the 1 st angular position and the adjusted 3 rd angular position.
With the method for manufacturing an absorbent article as described above, quick return setup change can be performed even in the processing unit 10 having no rotating body in the processing section, such as an adhesive application device.
In addition to the method for manufacturing the absorbent article, it is preferable that,
in the storing step, information is stored as information that enables the relative angle between the 1 st angular position and the 2 nd angular position to be specified, the 2 nd angular position being an angular position that is adjusted in the last angular adjustment step in the angular adjustment step performed when the one absorbent article is manufactured before the other absorbent article is manufactured.
In the method for manufacturing an absorbent article as described above, the processing position of the last adjustment in the previous manufacturing of one absorbent article can be returned to in the return setup of the absorbent article, so that the return setup can be performed more quickly.
An absorbent article manufacturing apparatus is characterized in that,
the absorbent article manufacturing apparatus includes:
a reference portion for setting a rotation reference position around a predetermined rotation axis;
a conveying mechanism that conveys a material of the absorbent article in a conveying direction in a state in which tension is applied thereto, in order to manufacture the absorbent article;
a 1 st processing mechanism including a 1 st motor and a 1 st processing unit that rotates about a 1 st rotation axis by the 1 st motor, the 1 st processing mechanism performing a 1 st processing on the raw material at a 1 st position in the transport direction at a 1 st rotational position of the 1 st motor corresponding to a 1 st angular position after rotating about the predetermined rotation axis by a 1 st rotation angle from the rotation reference position;
a 2 nd processing mechanism including a 2 nd motor and a 2 nd processing unit that rotates about a 2 nd rotation axis by the 2 nd motor, wherein the 2 nd processing mechanism performs a 2 nd processing on the material at a 2 nd position in the conveying direction at a 2 nd rotation position of the 2 nd motor corresponding to a 2 nd angular position rotated at a 2 nd rotation angle about the predetermined rotation axis from the rotation reference position;
a control unit that adjusts a 2 nd angular position so that a portion of the material subjected to the 1 st processing and a portion subjected to the 2 nd processing, the portions being released from the tension, are in a predetermined positional relationship; and
a storage unit for storing information,
when manufacturing an absorbent article, the control unit stores, in a storage unit, information that enables determination of a relative angle between a 1 st angular position and a 2 nd angular position after adjustment after the 2 nd angular position has been adjusted,
the control unit sets the 2 nd angular position using the information when manufacturing the other absorbent article after manufacturing the one absorbent article and when manufacturing the one absorbent article again after manufacturing the other absorbent article.
The absorbent article manufacturing apparatus as described above achieves the same operational effects as in the case of the absorbent article manufacturing method described above.
Method for manufacturing absorbent article according to the present embodiment
The method for manufacturing an absorbent article according to the present embodiment is used for manufacturing an absorbent article in the absorbent article manufacturing apparatus 1.
Examples of the absorbent article include sanitary napkins, disposable diapers of the open type and the pants type, but any article may be used as long as it absorbs excreta of the wearer.
The absorbent article includes an absorbent body that absorbs excretory fluid, a liquid-permeable top sheet that is disposed on the skin side in the thickness direction of the absorbent body, a liquid-impermeable back sheet that is disposed on the non-skin side of the absorbent body and prevents excretory fluid from leaking to the non-skin side, and a rubber thread as an example of an elastic member. The back sheet includes a back film and a back nonwoven fabric, and the back sheet is formed by overlapping the back film and the back nonwoven fabric.
The absorbent body has an absorbent core obtained by molding a liquid absorbent material. As the liquid absorbent material, pulp fiber and Super Absorbent Polymer (SAP) can be exemplified, and these materials are used here. Examples of the material of the top sheet and the back nonwoven fabric include nonwoven fabrics containing thermoplastic resin fibers such as polyethylene and polypropylene, and examples of the back film include thermoplastic resin films such as polyethylene.
Absorbent article manufacturing apparatus 1
Fig. 1 is a schematic diagram showing an example of an assembly line of an absorbent article manufacturing apparatus 1. The absorbent article manufacturing apparatus 1 is an apparatus that repeatedly performs various processes, such as cutting, pressing, and pasting, on a material of an absorbent article conveyed at a product pitch (an interval in the conveying direction of the product), thereby producing a continuous sheet-like material from a continuous absorbent article at the product pitch, and finally cuts the continuous sheet-like material into individual absorbent articles to manufacture finished absorbent articles. The various kinds of machining described above are performed by a machining unit 10 (corresponding to a machining means) having a machining portion that performs predetermined machining. The machining unit 10 for performing various kinds of machining is provided at a predetermined position on the conveyance path of the material, and performs machining by operating a machining portion with power of a power source (such as a motor). In addition, in fig. 1, for easy understanding of the present invention, the drawing of some of the processing units 10 is omitted in fig. 1 (hereinafter, the description of the processing units 10 is also omitted).
As shown in fig. 1, the absorbent article manufacturing apparatus 1 of the present embodiment includes a top sheet line 3 for processing a top sheet conveyed, an absorbent body line 4 for processing an absorbent body, a back sheet line 5 for processing a back sheet, and a product line 2 for processing a product material sheet, and the top sheet, the absorbent body, and the back sheet are joined at a joining point a to produce the product material sheet.
The top sheet conveyed by the top sheet line 3 is a sheet-like material, and is carried into the top sheet line 3 in the form of a material roll in which the top sheet is wound into a coil shape. That is, the top sheet is continuously fed from the raw material roll around which the top sheet is wound, and the continuously fed top sheet is conveyed in the conveying direction (the direction in which the top sheet continues) by a conveying mechanism (not shown). The top sheet is subjected to various processes and then reaches the joining point a to produce a product material sheet.
The top sheet continuously discharged from the raw material roll and conveyed on the top sheet line 3 reaches the embossing unit 10 e. The embossing unit 10e is a device for embossing the top sheet at a product pitch, and has a processing section including a pair of upper and lower rotating bodies with the top sheet conveyed therebetween. The outer peripheral surface of the upper roller 11U (rotating body) is engraved with a convex pattern of a predetermined pattern, and the outer peripheral surface of the lower roller 11L (rotating body) is engraved with a concave portion corresponding to the convex portion of the outer peripheral surface of the upper roller 11U. The uneven portions on the outer peripheral surfaces of the upper roller 11U and the lower roller 11L are heated by the heating unit, and the heated uneven portions cooperate with each other to sandwich (mesh) the conveyed top sheet, thereby embossing the top sheet.
The embossed top sheet is transported on the top sheet line 3 to the tape application unit 10 d. The tape joining unit 10d is a device for joining a fastening tape (japanese: ファスニングテープ) to a top sheet at a product pitch by using a transfer roller as a rotating body, and includes a processing portion including a pair of upper and lower rotating bodies for joining the fastening tape with the top sheet being conveyed therebetween. An air inlet is provided in the outer peripheral surface of the upper roller 11U, and suction force is generated by the air inlet, so that the upper roller 11U rotates in a state where the fastening tape is attracted to the outer peripheral surface. When the upper roller 11U rotates and the fastening tape attracted to the outer peripheral surface reaches a position facing the lower roller 11L, the upper roller 11U stops attracting (sucking) the fastening tape. The fastening tape is sandwiched and pressed with the top sheet in cooperation with the lower roller 11L. An adhesive is applied to a portion of the fastening tape to be joined to the top sheet, and the adhesive is pressed against the top sheet to be bonded, thereby performing a process of bonding the fastening tape.
The top sheet to which the fastening tape is attached is conveyed on the top sheet line 3 to reach the adhesive application unit 10 c. The adhesive application unit 10c is a device for applying a hot melt adhesive (hereinafter, also referred to as an adhesive) to the top sheet at a product pitch, and includes a processing section for applying the hot melt adhesive. The processing section is provided with a nozzle for discharging a liquid hot melt adhesive, and the hot melt adhesive is discharged from the nozzle tip toward the top sheet to apply the hot melt adhesive.
The top sheet coated with the hot melt adhesive is transported on the top sheet line 3 to reach the merging point a.
At the absorber line 4, the absorbers subjected to various kinds of processing by the processing units 10 provided on the conveyance path of the conveyed material (absorber) are conveyed to reach the merging point a, and at the backsheet line 5, the backsheets subjected to various kinds of processing by the processing units 10 provided on the conveyance path of the conveyed material (backsheet) are conveyed to reach the merging point a.
Then, at the joining point a, the top sheet conveyed on the top sheet line 3 and the back sheet conveyed on the back sheet line 5 are joined so as to sandwich the absorbent body conveyed on the absorbent body line 4, and the top sheet and the back sheet are joined by an adhesive or the like, thereby producing a product raw material sheet.
The product raw material sheet generated at the merging point a is conveyed on the product line 2 by the conveying mechanism to reach the rotary cutter (japanese: ロータリーダイカッター) unit 10 b. The rotary cutter unit 10b is a device for forming the outer shape of an absorbent article at product intervals on a product material sheet using a rotary cutter as a rotary body, and has a processing section including a pair of upper and lower rotary bodies with the product material sheet being conveyed therebetween. The upper roller 11U includes a cutter (upper blade), and the lower roller 11L includes an anvil (lower blade) that receives the cutter of the upper roller 11U. The upper blade of the upper roller 11U and the lower blade of the lower roller 11L cooperate with each other at a position where the upper roller 11U and the lower roller 11L face each other to cut the product material sheet, thereby forming the outer shape of the absorbent article in the product material sheet.
The product material sheet formed with the outer shape of the absorbent article is conveyed on the product line 2 to reach the end cutting unit 10 a. The end cutting unit 10a is a device for cutting the absorbent articles continuously produced at a product pitch on the product material sheet into absorbent articles one by an end cutter serving as a rotating body, and has a processing section composed of a pair of upper and lower rotating bodies with the product material sheet conveyed therebetween. The upper roller 11U includes an upper blade, and the lower roller 11L includes a lower blade receiving the upper blade. The upper blade of the upper roller 11U and the lower blade of the lower roller 11L cooperate with each other at a position where the upper roller 11U and the lower roller 11L face each other, and perform cutting processing so as to cross from one end to the other end in the width direction of the product raw material sheet. The absorbent articles continuously produced from the product raw material sheet are cut into individual absorbent articles by this cutting process, and finished absorbent articles are manufactured.
With respect to the processing unit 10
Fig. 2 is a schematic diagram showing a machining unit 10 that performs machining by a pair of upper and lower rotating bodies. The left drawing of fig. 2 is a front schematic view of the machining unit 10, and the right drawing of fig. 2 is a side sectional view of the machining unit 10.
As described above, the end cutting unit 10a, the rotary cutter unit 10b, the tape attaching unit 10d, and the embossing unit 10e are all processing units 10 that perform processing by a pair of upper and lower rotating bodies, and have the configuration shown in fig. 2. Hereinafter, the machining unit 10 that performs machining by using the pair of upper and lower rotating bodies shown in fig. 2 is also referred to as a rotating body machining unit. The structure of the rotating body processing unit (the adhesive application unit 10c will be described later) will be described with reference to fig. 2.
The rotating body processing unit includes a processing portion of an upper roller 11U and a lower roller 11L as a pair of upper and lower rotating bodies, and the conveyed material passes through a relative position F where the upper roller 11U and the lower roller 11L are opposed to each other. When the material passes through the relative position F, the processing unit processes the material.
The processing portion (the upper roller 11U and the lower roller 11L) of the rotating body processing unit is provided on the front surface side of the end plate 20 (the left side of the end plate 20 in the right drawing of fig. 2), and is provided on the unit mount 15 provided on the front surface side of the end plate 20. The unit mount 15 is provided for each rotor machining unit, and is fixed to a predetermined position of the end plate 20. The machining unit of the rotating body machining unit is installed on the unit mount 15 by installing the replacement unit of the rotating body machining unit. The replacement section is a part constituting a unit for replacing a processing section having a processing section and a positioning section and a processing section other than the processing section in the setup adjustment of the absorbent article manufacturing apparatus 1 described later. When the replacement part of the rotating body processing unit is to be installed, the installation position is positioned by the positioning part, and as shown in the left side of fig. 2, the concave part 10n provided at the lower part of the replacement part of the rotating body processing unit is fitted to the convex part 15a provided on the installation surface of the replacement part of the rotating body processing unit (the surface in contact with the bottom surface of the replacement part) of the unit mount 15.
That is, the concave portion 10n and the convex portion 15a are fitted to each other, and the rotor processing units are disposed at predetermined positions on the unit mount 15, whereby each rotor processing unit is disposed at a predetermined position on the material conveyance line of the absorbent article manufacturing apparatus 1. Therefore, for example, even when the replacement portion (for example, the distal end cutting unit 10a) of one of the rotary body processing units is once removed and then mounted again, the distance between the replacement portion and another rotary body processing unit (for example, the rotary die cutter unit 10b) on the conveyance path of the raw material before and after the removal is equal.
As shown in the right drawing of fig. 2, a driving unit 30 is provided as a power source on the back side of the end plate 20 (on the right side of the end plate 20 in the right drawing of fig. 2). 1 drive unit 30 is provided for each of 1 rotating body processing unit. The driving unit 30 of the present embodiment is a servo motor as an example of a motor for driving and rotating, and is fixed to the back surface side of the end plate 20. The servo motor has an encoder that detects the rotation angle of the servo motor and transmits the detection result to the control unit 50 described later. Examples of the encoder include an optical encoder and a magnetic encoder.
The drive shaft 31 of the drive unit 30 includes a drive gear 32, and meshes with the upper roller gear 13U. That is, when the driving portion 30 is driven to rotate, the driving gear 32 rotates via the driving shaft 31 to rotate the upper roller gear 13U.
The upper roller rotating shaft 12U is rotatably supported by a support portion, not shown, provided so as to penetrate from the back surface side to the front surface side of the end plate 20, and has an upper roller gear 13U fixed to one end side and an upper roller 11U fixed to the other end side. That is, when the driving unit 30 is driven to rotate, the upper roller gear 13U rotates, and when the upper roller gear 13U rotates, the upper roller 11U rotates via the upper roller rotation shaft 12U.
The lower roller 11L is also configured similarly to the upper roller 11U, and when the lower roller gear 13L rotates, the lower roller 11L rotates via the lower roller rotation shaft 12L. The lower roller gear 13L and the upper roller gear 13U are engaged so as to rotate in opposite directions. That is, the upper roller gear 13U (upper roller 11U) rotates clockwise, and the lower roller gear 13L (lower roller 11L) rotates counterclockwise, so that the gears mesh with each other.
In addition, the upper roller gear 13U is normally meshed with the lower roller gear 13L so that the upper roller 11U and the lower roller 11L rotate at the same rotational speed, and the present embodiment is configured as described above. For example, after the material is cut at the relative position F by the upper blade of the upper roller 11U and the lower blade of the lower roller 11L, the lower roller 11L is rotated 360 degrees when the upper roller 11U is rotated 360 degrees, and the upper blade and the lower blade perform the same cutting process again at the relative position F.
Next, the structure of the adhesive application unit 10c will be described. The adhesive applying unit 10c is provided on the front surface side of the end plate 20 and fixed to a predetermined position of the end plate 20. In the adhesive applying means 10c, since the hot-melt adhesive for adhering the top sheet and the back sheet is applied to the joining surface of the top sheet, the adhesive applying means 10c is provided on the side where the joining surface is located.
The hot melt adhesive is supplied from a melting tank provided in the absorbent article manufacturing apparatus 1 to a hot melt adhesive application device (nozzle as a processing unit). The melting tank melts the hot-melt adhesive from a solid state into a liquid state, and the liquid hot-melt adhesive is supplied to an application device of the hot-melt adhesive through a pipe. After the hot-melt adhesive application device conveys the predetermined processing position (application position) of the material to the position where the hot-melt adhesive is applied by the application device, the hot-melt adhesive starts to be discharged from the nozzle, and the hot-melt adhesive is applied to the predetermined processing position (application position) of the material.
The end cutting units 10a to 10e have functions corresponding to the respective processing purposes and adjustment functions thereof. For example, the processing unit 10 for performing the embossing processing by the embossing processing unit 10e includes a heating unit for heating the concave-convex portion and a temperature adjusting function (corresponding to a temperature adjusting step) for adjusting the temperature of the heated concave-convex portion according to the heating temperature of the heating unit. Further, the apparatus includes a pressurizing portion for pressing the uneven portion (the upper roller 11U and the lower roller 11L) and a pressure adjusting function for adjusting the pressing force to be pressed (corresponding to the pressing force adjusting step).
Regarding the operation of the processing unit 10
Next, the operation of the processing unit 10 of the absorbent article manufacturing apparatus 1 will be described.
Each processing unit 10 needs to perform predetermined processing at a predetermined position of the finished absorbent article. That is, a predetermined processing needs to be performed at a predetermined position of the conveyed material. When the processing is performed at a position deviated from the predetermined position, the finished absorbent article becomes a defective article and must be discarded. Therefore, it is necessary to control the operation of the processing unit 10 so that the processing position of each processing unit 10 becomes a predetermined position of the material.
In the present embodiment, the absorbent article manufacturing apparatus 1 includes 1 reference unit in order to control the operation of the processing unit 10. The reference portion has an origin and serves as a reference for the operation of each machining unit 10. That is, each machining unit 10 starts (stops) the operation of the reference portion at the same time as the start (stop) of the operation, and performs linkage with reference to the operation of the origin of the reference portion. The machining unit 10 is set with a machining angle, and when the origin of the reference portion rotates to reach the machining angle, the machining unit 10 set with the machining angle performs machining at a predetermined position of the conveyed material.
That is, the machining angle of the machining unit 10 differs depending on each machining unit 10, and the machining angle of the machining unit 10 is set in consideration of conditions such as where the machining portion of the machining unit 10 is to be machined (for example, where the machining portion is a rotating body and a cutting device, where a cutter is provided around a rotation axis of the rotating body), where the machining unit 10 is to be machined in a conveying direction of a conveyed material, and where the machining unit 10 is provided on a conveying path. That is, one machining angle is set for each machining unit 10.
In the present embodiment, each of the machining units 10 operates as follows with respect to the reference portion. That is, when the origin of the reference portion of the processing portion of each rotating body processing unit makes one rotation, the processing portion makes one rotation, and when the origin of the reference portion is 0 degrees (also referred to as a reference portion angle), the processing portion (rotating body) of each rotating body processing unit makes 0 degrees (also referred to as a rotating body angle) (that is, the angle of the processing portion (rotating body) when the origin of the reference portion is 0 degrees is defined as 0 degrees with respect to the rotating body angle). The machining angle is an angle at which the machining unit machines the material when the reference portion angle (the rotation body angle) is the angle. For example, if the machining angle is set to 90 degrees, the machining unit machines the material when the rotating body rotates in conjunction with the origin of the reference portion and the reference portion angle (rotating body angle) becomes 90 degrees.
In addition, a position where the origin of the reference portion is 0 degrees corresponds to one end of the product pitch, and a position where the origin of the reference portion is 360 degrees after one rotation corresponds to the other end of the product pitch. That is, with respect to the absorbent articles continuously produced on the raw material, one end of the absorbent article on the downstream side in the transport direction is set to 0 degree, and the other end on the upstream side is set to 360 degrees (0 degree which is the end of the next absorbent article on the upstream side in the transport direction) (see the following description with respect to the adhesive application unit 10c which is not a rotary body processing unit).
In the present embodiment, the reference portion is set as the driving portion 30 of the terminal cutting unit 10a, and the origin of the reference portion is set at a position where the rotation angle of the driving shaft 31 (driving gear 32) of the driving portion 30 is 0 degrees. That is, a rotation reference position (origin position of the reference portion) around a predetermined rotation axis (the drive shaft 31 of the distal end cutting unit 10a) is set (corresponding to the reference setting step). Then, the machining angle of each machining unit 10 is set with the origin of the reference portion as a reference. Here, the following description will be given with the processing angle of the end cutting unit 10a set to 0 degree, the processing angle of the rotary cutter unit 10b set to 30 degrees, the processing angle of the tape application unit 10d set to 60 degrees, and the processing angle of the embossing unit 10e set to 90 degrees.
The machining units of the rotating body machining units rotate using the driving units 30 of the respective rotating body machining units as driving sources. The motor of the driving unit 30 includes an encoder, and the control unit 50, which will be described later, detects the rotation angle of the driving unit 30, so that the control unit 50 recognizes the rotation angle of the processing unit of the rotating body processing unit (the rotating body angle). That is, the control unit 50 recognizes the rotation angle of the rotating body machining unit by the rotation angle of the driving unit 30. Therefore, the rotation angle (rotation position) corresponding to the machining angle of each rotating body machining unit exists in each drive unit 30.
That is, at the 1 st position in the conveying direction (for example, the position where the rotary die cutter unit 10b is located), the 1 st processing portion rotated around the 1 st rotation axis by the 1 st motor is used, the 1 st processing (corresponding to the 1 st processing step) is performed on the raw material at the rotation position of the 1 st motor corresponding to the 1 st angular position rotated around the predetermined rotation axis by the 1 st rotation angle (which is a processing angle, in the example, 30 degrees) from the reference rotation position (the position where the reference portion angle is 0 degrees), the 2 nd processing portion rotated around the 2 nd rotation axis by the 2 nd motor is used at the 2 nd position in the conveying direction (for example, the position where the embossing processing unit 10e is located), and the 2 nd motor at the rotation position corresponding to the 2 nd angular position rotated around the predetermined rotation axis by the 2 nd rotation angle (in the example, 90 degrees) from the reference rotation position, the material is subjected to the 2 nd processing (corresponding to the 2 nd processing step).
The adhesive application unit 10c does not have a rotary body like the rotary body processing unit described above, but can be controlled in the same manner as described above by converting the processing position into a rotation angle by assigning the rotation angle of the origin of the reference portion to the product pitch. As described above, one end of the absorbent article continuously produced on the material on the downstream side in the conveyance direction corresponds to 0 degree of the origin of the reference portion, and the other end on the upstream side corresponds to 360 degrees of the origin of the reference portion. The timing of discharging the hot melt adhesive from the nozzle is changed to a rotation angle of 0 to 360 degrees from the origin of the reference portion so as to apply the hot melt adhesive to a predetermined position of the material, and the rotation angle after the change is set as the processing angle of the adhesive applying unit 10 c. In this setting, since the rotation angle of the origin of the reference portion can be correlated with the timing of discharging the hot melt adhesive from the nozzle (set as a processing angle), the operation of the adhesive application unit 10c (for example, the opening and closing of the valve of the nozzle) can be controlled based on the operation of the reference portion, as in the rotary body processing unit.
That is, at the 3 rd position in the conveyance direction (the position where the adhesive application unit 10c is located), the 3 rd processing portion (nozzle) is used to apply the adhesive to the material at a timing after rotating around the predetermined rotation axis by the 3 rd rotation angle (the processing angle of the adhesive application unit 10 c) from the rotation reference position (corresponding to the 3 rd processing step).
The above description has been made of the operation of each processing unit 10 based on the operation of the reference portion as the operation of the processing unit 10, and the following description is made of the control of the operation of adjusting the processing position of each processing unit 10 one by one with respect to a change in the elongation state or the like of the conveyed material to perform processing at a predetermined position of the conveyed material.
In the present embodiment, since the material to be conveyed is in a sheet shape, the material is easily deflected in the thickness direction of the material at a place where the material is not supported (for example, between the processing unit 10 and the processing unit 10). Also, when the conveyed raw material is flexed, the raw material may deviate from a prescribed passing position in the width direction or wrinkles may be generated in the raw material when the raw material passes through the processing unit 10. That is, the machining defect may be caused. Therefore, the conveyance mechanism that conveys the material of the absorbent article in the conveyance direction while applying tension (corresponding to the conveyance step). In the present embodiment, the tension is applied to the material by using a tension adjusting device (see fig. 3). That is, the present invention has an adjustment function (corresponding to a tension adjustment step) of adjusting the tension applied to the material of the absorbent article.
The sheet-like material of the absorbent article is made of a material having extensibility such as a nonwoven fabric. Therefore, when the material is conveyed in a state in which tension is applied to the material, the material is conveyed in a state in which the material is always stretched. The tension adjusting device applies a constant tension to keep the material in a constant stretched state, but the thickness and width of the sheet-like material vary to some extent, and the stretched state of the material varies due to the variation. Further, depending on the environment around the absorbent article manufacturing apparatus 1, the environment such as the temperature and humidity of the place where the raw material is stored, the extension state of the raw material also changes due to the influence of the amount of moisture contained in the raw material, and the like. In the above description, the material (top sheet) is fed from the material roll which is produced for conveying the material sheet and which is usually produced by winding the material sheet around the shaft center at a constant rotational speed. Therefore, the raw material sheet closer to the axial center portion in the radial direction and the raw material sheet farther from the axial center portion receive different tensions when being wound, and the raw material has different elongation states. That is, the elongation state of the conveyed material changes every moment during the manufacturing of the absorbent article. Therefore, the operation of the processing unit 10 needs to be controlled so that the processing position of the processing unit 10 is a predetermined position matching the extended state of the material.
The absorbent article manufacturing apparatus 1 according to the present embodiment includes the processing position detection unit 40 and the control unit 50 for performing the above-described operation control. Fig. 3 is a diagram showing a relationship between the control unit 50 and another device.
The processing position detecting unit 40 is a device that detects processing positions of various types of processing performed on the conveyed material, and is provided along the conveyance path of the material. For example, the device detects the processing range of the embossing processing and the device detects the adhesion position of the fastening tape. Each machining position detecting unit 40 detects various machining positions and transmits the detection result to the control unit 50. Examples of the machining position detecting unit 40 include an imaging device and a photoelectric tube.
The control unit 50 includes an analysis unit 51 and a storage unit 52, and receives information such as the machining position of the material and the rotation angle of the drive shaft 31 transmitted from the machining position detection unit 40, the drive unit 30 (specifically, an encoder included in the drive unit 30), and the like. The received information and the information stored in the storage unit 52 are analyzed by the analysis unit 51 to calculate the amount of deviation of the machining position. When the deviation exceeds a predetermined threshold, the machining timing of the machining unit 10 that performs the machining is adjusted.
When the machining position detection unit 40 is an imaging device, for example, the machining position detection unit 40 captures an image of a machining position of a corresponding machining at a product pitch (in synchronization with a reference portion) and transmits the image to the control unit 50. The control unit 50 stores an image showing a reference machining position of the corresponding machining by the machining position detecting unit 40 (for example, an image showing a machining position at which the machining should be performed at a single machining position (reference position)), and the analyzing unit 51 reads the image of the reference machining position from the storage unit 52 and compares the read image with the machining position of the transmitted image. Then, the deviation amount of the machining position from the reference machining position of the target machining portion is calculated. A threshold value of the deviation from the reference machining position is set at each machining position for machining, and when the deviation exceeds the threshold value, the control unit 50 adjusts the rotation speed of the drive unit 30 of the machining unit 10 (rotary body machining unit).
In order to adjust (reset) the machining angle set in the rotating body machining means in which the deviation amount exceeds the threshold value, the rotational speed of the driving unit 30 of the rotating body machining means is adjusted. For example, when the timing of the machining by the rotating body machining means is late and the amount of deviation exceeds the threshold, the machining angle is reset so that the phase difference between the origin of the reference portion and the machining angle by the rotating body machining means is reduced. In this case, only the timing of the machining by the rotating body machining means can be advanced. Specifically, the rotational speed of the drive unit 30 of the rotating body machining means (the rotational speeds of the upper roller 11U and the lower roller 11L) is temporarily increased (when the deviation exceeds a threshold value due to early machining timing, the rotational speed of the drive unit 30 is temporarily decreased) until the deviation becomes smaller than the threshold value. When the deviation amount falls within the threshold value, the rotation speed that is temporarily increased (decreased) is adjusted to return to the original rotation speed, and as a result, the machining angle is reset.
That is, the 2 nd angular position (for example, the processing angle of the embossing unit 10 e) is adjusted so that the portion of the material (that is, the finished absorbent article) from which the tension is released, to which the 1 st processing (for example, the processing by the rotary press unit 10b) is performed, and the portion to which the 2 nd processing (for example, the processing by the embossing unit 10 e) is performed are in a predetermined positional relationship (corresponding to the angle adjustment step).
The timing for discharging the adhesive is adjusted with respect to the resetting of the processing angle of the adhesive application unit 10 c. That is, the machining angle is reset to adjust the opening/closing timing of the nozzle valve. That is, the 3 rd angular position (the processing angle of the adhesive application unit 10 c) is adjusted so that the part of the material, to which the 1 st processing (for example, the processing by the rotary die unit 10b) is applied, and the part to which the adhesive is applied (the application (processing) position of the adhesive application unit 10 c) of the material, from which the tension is released, are in a predetermined positional relationship (corresponding to another angular adjustment step).
In the present embodiment, the machining angle of each machining unit 10 adjusted in the angle adjustment step (the machining angle after the resetting) is stored in the storage unit 52. That is, after the angle adjustment step, information (for example, both machining angles) capable of specifying the relative angle between the 1 st angular position (for example, the machining angle of the rotary cutter unit 10b) and the adjusted 2 nd angular position (for example, the machining angle of the embossing unit 10e after the reset) is stored (corresponding to the storage step). In the case of the adhesive application unit 10c, information (for example, both processing angles) capable of specifying the relative angle between the 1 st angular position (for example, the processing angle of the rotary cutter unit 10b) and the adjusted 3 rd angular position (the processing angle of the adhesive application unit 10c after the resetting) is stored (corresponding to the storage step).
As described above, the end cutting units 10a to the embossing unit 10e have functions corresponding to the respective processing purposes and adjustment functions thereof. For example, the embossing unit 10e is provided with an adjusting function (means) for performing the temperature adjusting step and the pressurizing force adjusting step. In the present embodiment, the heating temperature, the pressurizing force, and the like adjusted by the above-described adjustment function are also stored in the storage unit 52 as the heating temperature, the pressurizing force, and the like of each processing unit 10 (corresponding to the storage step).
In addition, when the machine setup of the absorbent article manufacturing apparatus 1 described below is adjusted, the machine setup is performed using the information such as the processing angle stored in the storage unit 52.
Setup change adjustment for absorbent article manufacturing apparatus 1
Next, the setup change of the absorbent article manufacturing apparatus 1 will be described. The setup change of the absorbent article manufacturing apparatus 1 is to change the specifications of the absorbent article products manufactured by the absorbent article manufacturing apparatus 1. The specification of the product is the size, shape, and the like of the product, and the change of the specification of the product is, for example, a case of changing the size from the M size to the L size in the case of the size, a case of changing the sanitary napkin from the finned to the non-finned, or a case of changing the pattern shape of the embossing process in the case of the shape. In the production of absorbent articles, the specifications of the products of the absorbent articles to be produced are sometimes changed every 1 day, every time the absorbent article production apparatus is operated alternately during the day (that is, frequently), and the setup change of the absorbent article production apparatus 1 is performed every time.
In the setup change of the absorbent article manufacturing apparatus 1 according to the present embodiment, since the processing unit is a processing unit that performs various processes by replacing the raw material of the absorbent article in accordance with the specification to be changed, there are cases where a part of the absorbent article is replaced and where the entire absorbent article is replaced. In the replacement of the machining section, the replacement section of the machining unit 10 is removed and another replacement section of the machining unit 10 is attached. Therefore, the replacement parts of the machining units 10 before and after replacement, which are replaced for machine setup adjustment, have the same configuration.
In the absorbent article manufacturing apparatus 1, absorbent articles based on the same product specification are intermittently and repeatedly manufactured. That is, in order to manufacture an absorbent article again after manufacturing another absorbent article after manufacturing an absorbent article, setup change is intermittently repeated in accordance with the product specifications of the absorbent article. That is, a setup change is performed to return from one product to the original product with another product interposed therebetween. The setup change adjustment of this return will be described below.
Setup change for returning to original product specification
In the present embodiment, as the setup change adjustment for returning to the original product specification, one absorbent article is manufactured using the above-described end cutting unit 10a to embossing unit 10e, the replacement part of the rotary die unit 10b and the replacement part of the embossing unit 10e in the end cutting unit 10a to embossing unit 10e are replaced with the replacement parts of the other processing units 10 (rotary body processing units), respectively, the setup change adjustment for manufacturing the other absorbent article is performed, and after manufacturing the other absorbent article, the replacement parts of the respective other processing units 10 are replaced with the replacement parts of the rotary die unit 10b and the embossing unit 10e, and the setup change adjustment for returning to the manufacturing of the one absorbent article is performed.
Fig. 4 is a view in which the replacement part of the processing unit 10 that performs processing by the pair of upper and lower rotating bodies is detached from the end plate 20. Here, the explanation is given of the replacement section from which another rotor machining unit for manufacturing another absorbent article is removed for the purpose of return setup adjustment. As shown in fig. 4, when the replacement part of another rotary body processing unit is removed for the return replacement adjustment, the upper roller rotating shaft 12U and the lower roller rotating shaft 12L, the upper roller gear 13U and the lower roller gear 13L are removed together with the upper roller 11U and the lower roller 11L which are the processing parts of the rotary body processing unit. That is, the engagement between the drive gear 32 and the upper roller gear 13U is released, and the replacement part of the rotating body machining unit is removed. In the above-described removal method, the drive unit 30 fixed to the predetermined position of the end plate 20 is not replaced, and therefore, even if the machining unit of the machining unit 10 is replaced by machine change adjustment, the encoder of the drive unit 30 of the machining unit 10 can be kept energized (the servo motor itself may be de-energized to prevent malfunction or the like).
Next, the replacement parts of the rotary cutter unit 10b and the embossing unit 10e are attached to the positions where the replacement parts of the other rotary body processing units are provided. As described above, the replacement portions of the rotating body machining units before and after replacement have the same configuration. That is, the replacement sections of the rotary cutter unit 10b and the embossing unit 10e include the upper roller rotation shaft 12U and the lower roller rotation shaft 12L, and the upper roller gear 13U and the lower roller gear 13L, together with the processing section. As described above, the rotary press unit 10b and the embossing unit 10e are provided with the concave portion 10n at the lower portion of the replacement portion. Therefore, the concave portion 10n and the convex portion 15a of the unit mount 15 are used to position the upper roller gear 13U on the conveying path, and the drive gear 32 is engaged with the upper roller gear to mount the upper roller gear, so that the replacement portions of the rotary cutter unit 10b and the embossing unit 10e can be replaced.
In the previous manufacturing of an absorbent article (before each processing unit 10 is replaced with another processing unit), the respective processing angles of the rotary cutter unit 10b and the embossing unit 10e are adjusted by the angle adjustment step, and the adjusted (reset) respective processing angles are stored in the storage unit 52. In the present embodiment, the above-described machining angles stored in the storage unit 52 are used to perform a setup change adjustment for returning the rotary cutter unit 10b and the embossing unit 10e to the state in which the absorbent article was manufactured last time. Further, the processing angle of each processing unit 10 stored in the storage unit 52 is used not only for the processing unit 10 after replacement but also for each processing unit 10 (processing unit 10 not replaced) of the absorbent article manufacturing apparatus 1 to return to the state of manufacturing the absorbent article of the previous time.
That is, after the absorbent article is manufactured, another absorbent article is manufactured, and after the other absorbent article is manufactured, when the one absorbent article is manufactured again, the 2 nd angular position (for example, the processing angle of the embossing unit 10 e) is set using the information (the processing angle stored in the storage unit 52). The return setup change of the present embodiment is a setup change in which the absorbent article is returned to the state in which the absorbent article was manufactured by each processing unit 10 last time.
The procedure of the return setup will be described below with reference to the embossing unit 10e as an example with reference to fig. 5. Fig. 5 is an explanatory diagram for explaining the order of return setup.
The upper diagram of fig. 5 shows a state of the embossing unit 10e immediately before the replacement section of the previous embossing unit 10e is removed. A schematic front view of the embossing unit 10e viewed from the left side of the right drawing of fig. 2 is shown on the left side of fig. 5, and a triangle is shown inside the upper roller 11U. The triangles show the pattern generating portions (the raised patterns engraved on the outer peripheral surface of the upper roller 11U) for the embossing process, and the embossing process is performed on the material when the pattern generating portions are opposed to the material (in other words, when the pattern generating portions are positioned at 6 o' clock and directed downward in fig. 5).
In the present embodiment, when the reference portion angle (rotation body angle) is 0 degree, the embossing unit 10e is replaced. That is, the upper diagram of fig. 5 shows the state of the embossing unit 10e when the reference portion angle (rotation body angle) is 0 degrees. Here, the machining angle is set to 90 degrees, and the machining angle of 90 degrees is also stored in the storage unit 52 (accordingly, in the upper diagram of fig. 5, when the triangle is located at the position of 9 points, and the upper roller 11U is rotated 90 degrees counterclockwise from the state of the upper diagram, the pattern generating unit faces the material). Therefore, in the return setup adjustment of this example, the object (target) is that when the return setup adjustment described below is completed, the machining angle is also 90 degrees as in the above figure (that is, when the origin of the reference portion and the rotating body (upper roller 11U) are rotated in conjunction with each other from the state in which the reference portion angle is 0 degree, the pattern generating portion faces the material).
The center diagram of fig. 5 is a diagram showing a state of the embossing unit 10e immediately after the setup change is performed. In the return setup adjustment, the replacement part of the rotating body processing unit is attached, but in this case, the positions of the pattern generating part are not fixed (different for each attachment). This time, as shown in the center view of fig. 5, the operator has attached the replacing part, and as a result, the position of the pattern generating part is located at 8 o' clock. Further, the absorbent article manufacturing apparatus 1 (control unit 50) cannot certainly recognize that the replacement unit is attached in a state where the pattern generation unit is located at several points.
Then, first, the control section 50 rotates the upper roller 11U (and the lower roller 11L) so that the pattern generating section is located at the position of 12 dots (see the lower diagram of fig. 5. that is, when the pattern generating section is located at the position of 12 dots and the pattern generating section is located at the position of 12 dots). In the present embodiment, the end plate 20 is provided with a claw (japanese: ドグ) detecting unit 41a, and the upper roller 11U (specifically, the upper roller gear 13U) is provided with a claw 41b via a bracket 41 c. The claw 41b is attached to a position such that the pattern generating portion is positioned at the 12 o' clock position when the claw 41b faces the claw detecting portion 41a (when the claw detecting portion 41a detects the claw 41 b). Therefore, as shown in the lower diagram of fig. 5, the control section 50 rotates the upper roller 11U (and the lower roller 11L), and stops the rotation of the upper roller 11U (and the lower roller 11L) at the timing when the notice of the detection of the claws is received from the claw detection section 41a, so that the pattern generation section can be positioned at the position of 12 dots.
Next, the control unit 50 reads out the machining angle stored before the start of the setup return from the storage unit 52. Then, the machining angle after the return setup is adjusted is set using the machining angle. Specifically, the following is described.
That is, the state of the lower diagram of fig. 5 is a state in which the machining angle is 180 degrees (that is, a state in which the pattern generating portion faces the material when the origin of the reference portion and the rotating body (upper roller 11U) are rotated 180 degrees in conjunction with each other from a state in which the reference portion angle is 0 degrees), and therefore, in order to obtain 90 degrees which is the machining angle to be set (the machining angle read from the storage portion 52), it is necessary to rotate the upper roller 11U 90 degrees counterclockwise. That is, the control unit 50 performs an operation of 180 degrees to 90 degrees, and rotates the upper roller 11U by 90 degrees counterclockwise. As a result, the state of the embossing unit 10e becomes the state of the upper diagram of fig. 5, that is, the state in which the processing angle is 90 degrees (that is, the state in which the pattern generating portion faces the material when the origin of the reference portion and the rotating body (upper roller 11U) are rotated in conjunction with each other from the state in which the angle of the reference portion is 0 degrees), and the return setup adjustment of the embossing unit 10e is completed.
In this procedure, the embossing unit 10e is replaced when the reference portion angle is 0 degrees (in other words, when the reference portion angle is not 0 degrees, the reference portion angle is returned to 0 degrees), but the present invention is not limited to this, and replacement may be performed when the reference portion angle is not 0 degrees. In this case, when the return setup is performed, correction by a corresponding amount is also required.
For example, when the replacement is performed when the reference portion angle is 30 degrees, the state of the lower diagram in fig. 5 is a state in which the machining angle is 210 degrees (180 degrees +30 degrees) (that is, a state in which the pattern generating portion faces the material when the origin of the reference portion and the rotating body (upper roller 11U) are rotated 210 degrees in conjunction with each other from the state in which the reference portion angle is 0 degrees). Therefore, by rotating the upper roller 11U by 120 degrees (210 degrees to 90 degrees) in the counterclockwise direction, a state in which the processing angle is 90 degrees can be made.
As described above, even when the adhesive application unit 10c is changed from one absorbent article to another absorbent article in the previous time, the adjusted processing angle is already stored in the storage unit 52 as the processing angle of the adhesive application unit 10 c. Therefore, the adhesive application unit 10c also performs the setup return adjustment using the machining angle stored in the storage unit 52. That is, when the one absorbent article is manufactured again after the other absorbent article is manufactured, the 3 rd angular position (the processing angle of the adhesive application unit 10 c) is set using the information (the processing angle stored in the storage unit 52).
As described above, the heating temperature, the pressurizing force, and the like adjusted according to the adjustment function of each processing unit 10 are also stored in the storage unit 52 as the heating temperature, the pressurizing force, and the like of each processing unit 10. In the present embodiment, the above-described heating temperature, pressurizing force, and the like of each processing unit 10 stored in the storage unit 52 are used to perform the setup return adjustment. That is, when the one absorbent article is manufactured again after the other absorbent article is manufactured, the heating section (pressing section) heats (presses) at the stored heating temperature (pressing force).
In the present embodiment, the return setup is performed using the machining angle of the machining unit 10 that was adjusted last in the previous manufacturing of one absorbent article. That is, in the storing step, information (for example, both processing angles) capable of specifying the relative angle between the 1 st angular position (for example, the processing angle of the rotary cutter unit 10b) and the 2 nd angular position (for example, the processing angle of the embossing unit 10 e) is stored, and the 2 nd angular position is the angular position adjusted in the final angular adjustment step in the angular adjustment step performed when one absorbent article is manufactured before another absorbent article is manufactured. Therefore, the storage of the processing angle of the processing unit 10 in the storage unit 52 may be performed every adjustment (reset), or may be performed only immediately before the setup for another absorbent article.
Effectiveness of the present embodiment
As described above, in the method for manufacturing an absorbent article according to the present embodiment, an absorbent article is manufactured by a manufacturing method including a reference setting step of setting a rotation reference position around a predetermined rotation axis, a transport step of transporting a material of the absorbent article in a transport direction in a state in which tension is applied in order to manufacture the absorbent article, a 1 st processing step of performing a 1 st processing on the material at a rotation position of a 1 st motor corresponding to a 1 st angular position rotated at a 1 st rotation angle around the predetermined rotation axis from the rotation reference position by using a 1 st processing unit rotated around the 1 st rotation axis in the transport direction, the 2 nd processing step of performing the 2 nd processing on the raw material at a 2 nd angular position corresponding to a 2 nd angular position after rotating the raw material at the 2 nd rotational angle around the predetermined rotational axis at the 2 nd rotational angle from the rotation reference position by using a 2 nd processing portion rotated around a 2 nd rotational axis by a 2 nd motor at a 2 nd position in the transport direction, the angle adjusting step of adjusting the 2 nd angular position so that a portion of the raw material subjected to the 1 st processing and a portion subjected to the 2 nd processing, from which the tension is released, have a predetermined positional relationship, the storing step of storing information enabling determination of a relative angle between the 1 st angular position and the adjusted 2 nd angular position after the angle adjusting step, the method of manufacturing an absorbent article of the present embodiment, after manufacturing the absorbent article, and (3) manufacturing another absorbent article, and setting the 2 nd angular position using the information when manufacturing the absorbent article again after manufacturing the another absorbent article. Therefore, the return setup can be quickly performed.
Conventionally, the machining unit 10 is replaced in accordance with the product specification, and the machine setup of the absorbent article manufacturing apparatus 1 is performed. In the method of performing the setup change of the absorbent article manufacturing apparatus 1 by replacing the processing unit 10, it takes a long time to return to the setup change, which causes a problem of a decrease in productivity. That is, it is necessary to reset the manufacturing conditions each time the machine setup of the absorbent article manufacturing apparatus 1 is performed, and to adjust the processing position at which the material is processed from the beginning in accordance with the specification of the product to be subjected to the return machine setup.
In contrast, in the present embodiment, as described above, the processing angle adjusted when manufacturing the previous absorbent article is stored in the storage unit 52, and when performing the return setup adjustment of the one absorbent article, the stored processing angle is used as the processing angle at the time of the return setup adjustment. Therefore, the processing position at which the processing unit 10 that has returned to the machine setup position processes the material becomes the processing position that has been adjusted when the previous absorbent article was manufactured (i.e., the processing position returns to the previous state), and it is not necessary to adjust the processing position from the beginning (from the initial setup state). Namely, quick return setup adjustment can be performed.
In the storage step, information that can specify a relative angle between the 1 st angular position and the 2 nd angular position is stored, and the 2 nd angular position is an angular position that has been adjusted in the last angular adjustment step in the angular adjustment step performed when the one absorbent article is manufactured before the other absorbent article is manufactured. That is, the processing position at which the material after the return setup of the absorbent article is processed is the processing position after the last adjustment at the time of manufacturing the previous absorbent article, so that the return setup can be further quickly performed.
The method for manufacturing an absorbent article further includes a temperature adjustment step of adjusting a heating temperature of the heating unit, wherein the adjusted heating temperature is stored in the storage step, and the heating unit heats the absorbent article at the stored heating temperature when the absorbent article is manufactured again after the other absorbent article is manufactured. That is, the heating temperature of the heating section after the return setup for the absorbent article is adjusted becomes the heating temperature adjusted at the time of manufacturing the previous absorbent article, and it is not necessary to adjust the heating temperature from the beginning, so that the return setup can be further quickly performed.
The method for manufacturing an absorbent article further includes a pressurizing force adjusting step of adjusting a pressurizing force of the pressurizing portion, wherein the pressurizing force after adjustment is stored in the storing step, and the pressurizing portion pressurizes the pressurizing force by the stored pressurizing force when the absorbent article is manufactured again after the other absorbent article is manufactured. That is, the pressurizing force for pressurizing the material after the return setup of the absorbent article becomes the pressurizing force adjusted at the time of manufacturing the previous absorbent article, and it is not necessary to adjust the pressurizing force from the beginning, so that the return setup can be further quickly performed.
The method for manufacturing an absorbent article further includes a 3 rd processing step of applying an adhesive to the raw material at a 3 rd position in the transport direction at a 3 rd rotation angle from the rotation reference position by using a 3 rd processing unit at a timing after the raw material is rotated at the 3 rd rotation angle around the predetermined rotation axis, and the method for manufacturing an absorbent article further includes another angle adjusting step of adjusting the 3 rd angular position so that a portion of the raw material subjected to the 1 st processing and a portion to which the adhesive is applied have a predetermined positional relationship, the information including information capable of specifying a relative angle between the 1 st angular position and the 3 rd angular position after the adjustment, and when manufacturing the absorbent article again after the other absorbent article is manufactured, the 3 rd angular position is set using the information. Therefore, even in the processing unit 10 having no rotating body as a processing portion such as an adhesive application device, quick return setup change adjustment can be performed.
Second embodiment
Next, a second embodiment will be explained. The upper view of fig. 6 corresponds to the right view of fig. 2, and is a side sectional view of the processing unit 10 according to the second embodiment, and the lower view of fig. 6 is a view showing 3 kinds of sectional shapes at the fitting portion of the upper roller rotating shaft 12U according to the second embodiment.
In the second embodiment, when the replacement portion of the rotating body processing unit is replaced, the upper roller rotating shaft 12U is attached and detached by a coupling (coupling) without releasing the engagement between the upper roller gear 13U and the drive gear 32, and the replacement portion of the rotating body processing unit is replaced. Therefore, the rotary body processing unit according to the second embodiment includes two upper roller rotating shafts 12U (hereinafter, also referred to as two rotating shafts) provided on the upper roller rotating shaft 12U of the upper roller gear 13U (hereinafter, also referred to as a rotating shaft on the drive unit 30 side) and the upper roller rotating shaft 12U (hereinafter, also referred to as a rotating shaft on the replacement unit side) of the upper roller 11U, and the two rotating shafts are provided with fitting portions (a shaft and a hole). The fitting portions provided in the two rotating shafts are not circular in cross section, and are partially deformed.
Fig. 6 is a lower view showing 3 examples of cross-sectional shapes on the axial side which can be used as the fitting portion. That is, it is possible to use: a shape having a notch at an angle from the center of the rotation axis to the outer periphery, like the cross-sectional shape on the left side of the lower view in fig. 6; a shape having a notch such as a cross-sectional shape at the center of the lower view of fig. 6 and having a plane in a direction intersecting the radial direction; a drop-like shape having a circular projection portion as in the right-hand cross-sectional shape of the bottom view of fig. 6. The hole-side cross-sectional shape of the fitting portion is a cross-sectional shape corresponding to the above-described axial cross-sectional shape. That is, if the rotating shaft has the notch portion, the counterpart side has a protrusion portion corresponding thereto, and if the rotating shaft has the protrusion portion, the counterpart side has a notch portion corresponding thereto. Thus, the two rotary shafts can be attached and detached only when the cross-sectional shapes of the two rotary shafts are matched.
Next, in the second embodiment, the encoders of the driving unit 30 provided in the respective rotary machining units are kept energized before and after the setup change. That is, after another absorbent article is manufactured, the encoder provided to the 1 st motor (for example, the drive section 30 disposed in the rotary die cutter unit 10b) and the encoder provided to the 2 nd motor (for example, the drive section 30 disposed in the embossing unit 10 e) are in an energized state until an absorbent article is manufactured again. The term "power on" used herein means a state in which power is supplied to the device, and does not mean turning on or off the power supply of the device. Even if the power supply is "off", if the power plug is plugged into the power supply, power is supplied to the device via the power plug, and therefore such a case is also within the scope of the "on" state. Before and after the setup change, the encoders of the respective driving units 30 are energized, and the control unit 50 can detect the rotation angles of the respective driving units 30.
In addition, the reason why the setup change is easily performed in the state where the encoder is powered on is that only the replacement part of the rotating body processing unit is replaced and the driving part 30 of the rotating body processing unit is not replaced in the setup change of the rotating body processing unit. That is, after the one absorbent article is manufactured, another processing unit is used instead of the 2 nd processing unit when the other absorbent article is manufactured, and after the other absorbent article is manufactured, the 2 nd processing unit is used again instead of the another processing unit when the one absorbent article is manufactured again. In this case, since the power plug can be kept inserted into the power supply during the setup adjustment of the rotary machining unit, the encoder can be easily energized.
In addition, in the present embodiment, since the mounting by the coupling (coupling) is performed, the above-described uncertainty (the phenomenon that the pattern generating portion is located at several points and is different from mounting to mounting) does not occur. That is, the rotation angle of the driving unit 30 and the positions where the pattern generating portions are located correspond to each other in a one-to-one manner, and the correspondence relationship does not change every time the mounting is performed. Therefore, when the encoder is powered on in advance, the control unit 50 can grasp not only the rotation angle of the driving unit 30 but also the position of the pattern generating unit before and after the setup change.
Further, since the position on the transport path of the rotary shaft on the side of the driving unit 30 is not changed by the replacement of the replacement portion of the rotary body processing unit, the position on the transport path of the replacement portion (processing portion) of the rotary body processing unit returned after the machine replacement adjustment is the same as the position on the transport path on which the replacement portion (processing portion) of the rotary body processing unit was provided before the removal. That is, the replacement unit (processing unit) of one rotating body processing unit is provided only at a predetermined position on the conveying path (unit mount 15).
Third embodiment
Next, a third embodiment will be explained. Fig. 7 is a side sectional view of the processing unit 10 according to the third embodiment, corresponding to the right view of fig. 2.
In the third embodiment, when the replacement portion of the rotary body machining unit is replaced, the machining unit 10 is replaced by attaching and detaching the upper roller rotating shaft 12U and the lower roller rotating shaft 12L by a coupling (coupling) without releasing the engagement between the upper roller gear 13U and the drive gear 32. As this coupling, a schmitt coupling 14 (a link-type coupling that can cope with a change in the height dimension of the coupling attachment/detachment position due to a change in the shaft diameter of the processing portion) is used.
In the third embodiment, the mechanism on the back side of the end plate 20 is not replaced when the replacement portion of the rotating body processing unit is replaced. That is, the position on the conveyance path of the rotary shaft on the side of the driving unit 30 is not changed by the replacement of the replacement unit of the rotary body processing unit.
Further, as in the second embodiment, the schmitt joint 14 may be attached and detached only when the cross-sectional shape is uniform.
Fourth embodiment
Next, a fourth embodiment will be explained. In the above description, the angle adjusting step (i.e., the continuous angle adjusting step) of adjusting the processing angle of each processing unit 10 by the control unit 50 in order to cope with the change in the elongation state of the conveyed material at every moment has been described, but in the fourth embodiment, the angle adjusting step as described above is further intermittently executed, and the angle adjusting step is always executed at the timing of adjusting the following manufacturing conditions (processing conditions) of the absorbent article manufacturing apparatus 1.
First, the angle adjustment step is executed at a timing when the tension of the conveyed material is changed by the tension adjustment device to adjust the manufacturing conditions of the absorbent article manufacturing apparatus 1. That is, the above-described angle adjusting process is performed after the tension adjusting process. When the tension applied to the conveyed raw material is changed, the elongation state of the raw material may be changed. Therefore, since the angle adjusting step is executed at an appropriate timing by adjusting the machining angle of each machining unit 10 at this timing, more accurate information can be stored in the storage unit 52 when the subsequent storing step is executed, and quick return setup adjustment can be performed.
Next, the angle adjustment step is executed at a timing when the conveyance speed of the conveyed material is changed by the conveyance mechanism to adjust the manufacturing conditions of the absorbent article manufacturing apparatus 1. That is, the above-described angle adjusting process is performed after the speed adjusting process. The conveyance mechanism for conveying the material has a function of adjusting the conveyance speed of the material (corresponding to a speed adjustment step), and the conveyance speed of the material may be adjusted in order to adjust the amount of absorbent article produced per unit time. For example, the production of the absorbent article may be stopped due to an unknown defect, and the conveyance speed of the raw material may be increased in order to increase the production amount of the absorbent article per unit time after the restart of the production as compared with the usual case.
When the conveying speed of the conveyed material is changed, the moving speed of the material changes, and therefore the elongation state of the material may change. Therefore, since the angle adjusting step is executed at an appropriate timing by adjusting the machining angle of each machining unit 10 at this timing, more accurate information can be stored in the storage unit 52 when the subsequent storing step is executed, and quick return setup adjustment can be performed.
Finally, it has been described that the top sheet is continuously fed from the raw material roll and conveyed in the top sheet line 3, but the angle adjusting process is also performed when the raw material roll for supplying the top sheet from the conveyed top sheet is changed to a raw material roll for a next new top sheet. That is, after the stock roll is replaced with a new stock roll (corresponding to the replacement process), the angle adjustment process is performed. The supply of stock material is performed by connecting the existing stock roll and the new stock roll by means of the stock material connections, originating from the change of the existing stock roll to the new stock roll. That is, when the supply is switched from the existing roll to the new roll, the position in the radial direction of the roll from which the material is continuously discharged moves outward in the radial direction simultaneously with the switching. As described above, the extension state of the material sheet wound around the material roll further differs in the radial direction. That is, at the timing of switching to a new material roll, the position in the radial direction of the material roll of the continuously fed-out material sheet greatly changes, and therefore the extension state of the material may also change. Therefore, it is preferable to adjust the machining angle of one machining unit 10. Therefore, since the angle adjusting step is executed at an appropriate timing by adjusting the machining angle of each machining unit 10 at this timing, more accurate information can be stored in the storage unit 52 when the subsequent storing step is executed, and quick return setup adjustment can be performed.
Other embodiments
The embodiments are described in order to facilitate understanding of the present invention and are not intended to be construed in a limiting sense. The present invention can be modified and improved without departing from the gist thereof, and the present invention naturally includes equivalents thereof.
In the above embodiment, the rotation angle of each driving unit 30 can be detected by the control unit 50 before and after the setup adjustment by performing the setup adjustment while keeping the encoder of each driving unit 30 energized. For example, even when the encoder of each drive unit 30 is not energized, the rotation angle of each drive unit 30 may be stored in the storage unit 52 in advance after the drive shaft 31 of each drive unit 30 is restrained from rotating before the non-energization, and the restrained state may be maintained while the encoder is in the non-energized state. That is, in the storing step, the angular positions of the 1 st motor and the 2 nd motor at the time of storing the information may be stored, and the 1 st motor and the 2 nd motor may be restrained from rotating when the encoder provided in the 1 st motor and the encoder provided in the 2 nd motor are in a non-energized state (corresponding to a restraining step).
When the encoder returns from the non-energized state to the energized state in the above-described restricting step, the control unit 50 reads the rotation angle of each driving unit 30 from the storage unit 52, and when the restricting state is released after the rotation angle of each driving unit 30 is set, the control unit 50 can detect the rotation angle of each driving unit 30 without performing origin finding of the driving unit 30 (japanese: origin finding し). As an example of restraining the drive shaft 31, there is an example in which a restraining mechanism is provided to mechanically restrain the rotation of the drive shaft 31 using a frictional force, and the restraining mechanism presses a high frictional force over the entire circumference of a part of the outer circumferential surface of the drive shaft 31 and a restraining portion that is less likely to slip with the drive shaft 31.
In the above embodiment, the concave portion 10n and the convex portion 15a are fitted to each other to position the replacement portion of the rotating body machining unit on the conveying path. For example, as shown in the upper view of fig. 8, an outer surface of the replacement part of the rotating body processing unit may be fitted to an inner surface of the unit mount 15, and a slide rail 16 (air slide rail) on which the replacement part of the rotating body processing unit moves may be provided on the replacement part installation surface of the rotating body processing unit of the unit mount 15. In another example, as shown in the center of fig. 8, the end plate 20 may be provided with a positioning portion 20a that is fitted to the outer surface of the replacement portion of the rotating body machining unit to perform positioning, or as shown in the lower drawing of fig. 8, the replacement portion of the rotating body machining unit may be provided with a hole to be fitted to a positioning rod 20b provided in the end plate 20 to perform positioning.
In the above-described embodiment, the mechanism using the gear is used as the transmission mechanism for the driving rotation of the driving portion 30 and the processing portion of the rotating body processing unit, but the present invention is not limited to this. For example, a transmission mechanism using a sheave and a belt for driving rotation may be used.
In the above embodiment, the machining angle is set to a single angle, but the present invention is not limited to this. For example, the ranges of the start rotation angle and the end rotation angle of the machining may be set as the machining angle.
In the above embodiment, the return setup adjustment is performed using the machining angle of the machining unit 10 that was adjusted last in the previous manufacturing of one absorbent article, but the present invention is not limited to this. For example, the return setup may be adjusted using not only the machining angle but also the heating temperature and the pressurizing force that have been adjusted last.
In the above embodiment, the rotating body processing unit has only a pair of upper and lower rotating bodies, but the present invention is not limited to this. For example, a rotary body other than the pair of upper and lower working portions (a rotary body other than the working portion) may be provided to transfer the material stuck to the material to the pair of upper and lower working portions at a product pitch.
In the above-described embodiment, the power plug is inserted into the power supply before and after the setup return to place the encoder in the energized state, but the present invention is not limited to this. For example, the processing unit 10 may be provided with a backup battery, and the encoder may be energized by the backup battery.
In the above embodiment, the reference portion is set as the driving portion 30 of the distal end cutting unit 10a, but the present invention is not limited thereto. For example, a reference portion for only setting the origin may be provided separately from the machining unit 10.
In the above embodiment, the processing unit 10 provided in the top sheet line 3 and the product line 2 is described, but the present invention is not limited thereto. The present invention can also be applied to the processing units 10 provided in the absorber line 4 and the backsheet line 5.
Description of the reference numerals
1. An absorbent article manufacturing apparatus; 2. a product line; 3. a top sheet flow line; 4. an absorber line; 5. a backsheet assembly line; 10. a processing unit; 10a, a terminal cutting unit; 10b, a rotary die cutter unit; 10c, an adhesive applying unit; 10d, a tape application unit; 10e, an embossing unit; 10n, a recess; 11U, upper roller; 11L, lower roller; 12U, upper roller rotation shaft; 12L, lower roller rotation shaft; 13U, upper roller gear; 13L, lower roller gear; 14. a Schmidt coupling; 15. a unit stand; 15a, a convex portion; 16. a slide rail; 20. an end plate; 20a, a positioning part; 20b, a positioning rod; 30. a drive section; 31. a drive shaft; 32. a drive gear; 40. a machining position detection unit; 41a, a claw detection part; 41b, a jaw; 41c, a bracket; 50. a control unit; 51. an analysis unit; 52. a storage unit; A. a point of confluence; F. relative position.

Claims (12)

1. A method for manufacturing an absorbent article, characterized in that,
an absorbent article is manufactured by a manufacturing method including a reference setting step, a conveying step, a 1 st processing step, a 2 nd processing step, an angle adjusting step, and a storing step,
the reference setting step sets a reference position of rotation about a predetermined rotation axis,
the conveying step conveys a material of the certain absorbent article in a conveying direction with tension applied thereto in order to manufacture the certain absorbent article,
the 1 st processing step performs the 1 st processing on the raw material at a 1 st position in the conveying direction using a 1 st processing unit that is rotated about a 1 st rotation axis by a 1 st motor, at a 1 st rotation position of the 1 st motor corresponding to a 1 st angular position after being rotated about the predetermined rotation axis by a 1 st rotation angle from the rotation reference position,
the 2 nd processing step performs the 2 nd processing on the raw material at a 2 nd position in the conveying direction using a 2 nd processing portion rotated by a 2 nd motor around a 2 nd rotation axis at a 2 nd angular position after being rotated by a 2 nd rotation angle from the rotation reference position around the predetermined rotation axis,
the angle adjusting step adjusts the 2 nd angular position so that the part of the material subjected to the 1 st processing and the part subjected to the 2 nd processing, from which the tension is released, have a predetermined positional relationship,
the storing step stores information that can specify a relative angle between the 1 st angular position and the adjusted 2 nd angular position after the angle adjusting step,
the method for manufacturing an absorbent article includes manufacturing the absorbent article and then manufacturing another absorbent article,
after the other absorbent article is manufactured, the 2 nd angular position is set using the information when manufacturing the certain absorbent article again.
2. The method of manufacturing an absorbent article according to claim 1,
after the another absorbent article is manufactured, the encoder provided in the 1 st motor and the encoder provided in the 2 nd motor are energized before the certain absorbent article is manufactured again.
3. The method of manufacturing an absorbent article according to claim 1,
in the storing step, the angular positions of the 1 st motor and the 2 nd motor at the time of storing the information are stored,
the method for manufacturing an absorbent article includes a restricting step of restricting the 1 st motor and the 2 nd motor from rotating when the encoder provided on the 1 st motor and the encoder provided on the 2 nd motor are not energized.
4. The method of manufacturing an absorbent article according to any one of claims 1 to 3,
after the certain absorbent article is manufactured, another processed part is used instead of the 2 nd processed part when manufacturing the other absorbent article,
when the certain absorbent article is manufactured again after the other absorbent article is manufactured, the 2 nd processed part is reused instead of the other processed part.
5. The method of manufacturing an absorbent article according to any one of claims 1 to 4,
the method for manufacturing an absorbent article further comprises a tension adjustment step of adjusting tension applied to the material of the absorbent article,
the angle adjusting process is performed after the tension adjusting process.
6. The method of manufacturing an absorbent article according to any one of claims 1 to 5,
the method for manufacturing an absorbent article further comprises a speed adjustment step of adjusting the conveyance speed of the raw material,
the angle adjusting process is performed after the speed adjusting process.
7. The method of manufacturing an absorbent article according to any one of claims 1 to 6,
in the conveying step, the raw material continuously fed from a raw material roll is conveyed,
the method for manufacturing the absorbent article comprises a replacing step of replacing the raw material roll with a new raw material roll,
the angle adjusting process is performed after the replacing process.
8. The method of manufacturing an absorbent article according to any one of claims 1 to 7,
the 2 nd processing unit provided with the 2 nd processing unit is provided with a heating part,
the method for manufacturing an absorbent article further includes a temperature adjustment step of adjusting the heating temperature of the heating unit,
the adjusted heating temperature is stored in the storage step,
when the certain absorbent article is manufactured again after the other absorbent article is manufactured, the heating unit heats the certain absorbent article at the stored heating temperature.
9. The method of manufacturing an absorbent article according to any one of claims 1 to 8,
the 2 nd processing unit having the 2 nd processing unit has a pressing portion,
the method for manufacturing an absorbent article further comprises a pressurizing force adjusting step of adjusting the pressurizing force of the pressurizing portion,
the adjusted pressurizing force is stored in the storing step,
when the certain absorbent article is manufactured again after the other absorbent article is manufactured, the pressing portion presses the certain absorbent article with the stored pressing force.
10. The method of manufacturing an absorbent article according to any one of claims 1 to 9,
the method for manufacturing an absorbent article further includes a 3 rd processing step of applying an adhesive to the raw material at a 3 rd position in the conveyance direction by using a 3 rd processing unit at a timing after rotating around the predetermined rotation axis at a 3 rd rotation angle from the rotation reference position,
the method for manufacturing an absorbent article further comprises another angle adjustment step of adjusting a 3 rd angular position so that a portion of the material subjected to the 1 st processing and a portion to which the adhesive is applied, from which the tension is released, have a predetermined positional relationship,
said information comprising information enabling the determination of the relative angle of said 1 st angular position and said adjusted 3 rd angular position,
setting the 3 rd angular position using information that enables determination of a relative angle between the 1 st angular position and the adjusted 3 rd angular position when manufacturing the certain absorbent article again after manufacturing the other absorbent article.
11. The method of manufacturing an absorbent article according to any one of claims 1 to 10,
in the storing step, information is stored as information that enables the determination of the relative angle between the 1 st angular position and the 2 nd angular position, the 2 nd angular position being an angular position that has been adjusted in the last angular adjustment step in the angular adjustment step performed when the certain absorbent article is manufactured before the other absorbent article is manufactured.
12. An absorbent article manufacturing apparatus is characterized in that,
the absorbent article manufacturing apparatus includes:
a reference portion for setting a rotation reference position around a predetermined rotation axis;
a conveying mechanism that conveys a raw material of an absorbent article in a conveying direction in a state in which tension is applied thereto, in order to manufacture the absorbent article;
a 1 st processing mechanism including a 1 st motor and a 1 st processing unit that rotates about a 1 st rotation axis by the 1 st motor, the 1 st processing mechanism performing a 1 st processing on the raw material at a 1 st position in the conveyance direction at a 1 st rotational position of the 1 st motor corresponding to a 1 st angular position after rotating about the predetermined rotation axis by a 1 st rotation angle from the rotation reference position;
a 2 nd processing mechanism including a 2 nd motor and a 2 nd processing unit that is rotated about a 2 nd rotation axis by the 2 nd motor, wherein the 2 nd processing mechanism performs a 2 nd processing on the material at a 2 nd position in the conveyance direction at a 2 nd rotation position of the 2 nd motor corresponding to a 2 nd angular position rotated about the predetermined rotation axis by a 2 nd rotation angle from the rotation reference position;
a control unit that adjusts a 2 nd angular position so that a portion of the material subjected to the 1 st processing and a portion subjected to the 2 nd processing, which have released the tension, have a predetermined positional relationship; and
a storage section for storing information,
when manufacturing an absorbent article, the control unit stores, in a storage unit, information that enables identification of a relative angle between a 1 st angular position and the 2 nd angular position after adjustment after the 2 nd angular position has been adjusted,
the control unit sets the 2 nd angular position using the information when manufacturing the other absorbent article after manufacturing the certain absorbent article, and when manufacturing the certain absorbent article again after manufacturing the other absorbent article.
CN201880045619.0A 2017-12-28 2018-11-21 Method for manufacturing absorbent article and apparatus for manufacturing absorbent article Active CN110913813B (en)

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JP2017-253522 2017-12-28
JP2017253522A JP6983064B2 (en) 2017-12-28 2017-12-28 Absorbent article manufacturing method and absorbent article manufacturing equipment
PCT/JP2018/043012 WO2019130918A1 (en) 2017-12-28 2018-11-21 Method of manufacturing absorbent article and device for manufacturing absorbent article

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