WO2013150835A1 - Application device and application method - Google Patents

Application device and application method Download PDF

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Publication number
WO2013150835A1
WO2013150835A1 PCT/JP2013/054924 JP2013054924W WO2013150835A1 WO 2013150835 A1 WO2013150835 A1 WO 2013150835A1 JP 2013054924 W JP2013054924 W JP 2013054924W WO 2013150835 A1 WO2013150835 A1 WO 2013150835A1
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WO
WIPO (PCT)
Prior art keywords
liquid
target range
amount
pump
nozzle
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PCT/JP2013/054924
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French (fr)
Japanese (ja)
Inventor
晴彦 坂上
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ユニ・チャーム株式会社
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Publication of WO2013150835A1 publication Critical patent/WO2013150835A1/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/84—Accessories, not otherwise provided for, for absorbent pads
    • A61F13/8405—Additives, e.g. for odour, disinfectant or pH control
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/42—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators with wetness indicator or alarm

Definitions

  • the present invention relates to an application apparatus and an application method.
  • the absorbent article in order to improve the feel and texture of absorbent articles such as paper diapers and sanitary napkins, is composed of a low-viscosity liquid such as a lotion, a softener, and a water-soluble antibacterial agent.
  • a method of applying to a sheet is disclosed.
  • Patent Document 1 does not mention anything about this.
  • an object of the present invention is to provide an application device and an application method capable of detecting the amount of liquid actually applied to a product, semi-finished product or material of an absorbent article.
  • An application device that applies a liquid having a viscosity in the range of 0.05 to 4 Pa ⁇ s to a product, semi-finished product, or material of an absorbent article that is being transported by a transport device, A tank containing the liquid; A nozzle for applying the liquid to the product, semi-finished product or material; A pump for supplying the liquid in the tank to the nozzle via a tube; A liquid meter disposed in the tube between the pump and the nozzle to detect the amount of liquid supplied from the pump to the nozzle; Comprising An application device is provided.
  • the supply amount of the pump based on the amount of liquid detected by the liquid meter. This is because the amount of liquid actually applied to the product, semi-finished product or material of the absorbent article can be appropriately controlled.
  • a determination device for determining whether or not the amount of liquid detected by the liquid meter is within a target range. This is because the user can recognize whether or not the amount of liquid actually applied to the product, semi-finished product, or material of the absorbent article is within the target range.
  • the target range includes a first target range
  • the determination device determines that the amount of liquid detected by the liquid meter is outside the first target range
  • the liquid amount It is preferable to further include a control device for controlling the supply amount of the pump so that the amount of liquid detected by the meter falls within the first target range. This is because an amount of liquid within the first target range can be applied to the product, semi-finished product, or material of the absorbent article.
  • the target range includes a second target range
  • the application device It is preferable to further include an application stopping device for stopping the application action. It is because it can prevent that the liquid of the quantity outside a 2nd target range is applied to the product of an absorbent article, a semi-finished product, or a raw material.
  • the apparatus further includes a transport stop device that stops the transport device when the determination device determines that the amount of the liquid detected by the liquid meter is outside the second target range. This is because when the application of the liquid to the product, semi-finished product or raw material of the absorbent article is stopped, wasteful conveyance of the product, semi-finished product or raw material of the absorbent article can be prevented.
  • the target range includes a third target range, and when the determination device determines that the amount of liquid detected by the liquid meter is out of the third target range, an alarm is provided. It is preferable to further provide an alarm device to be activated. This is because the user can recognize that the amount of liquid actually applied to the product, semi-finished product, or material of the absorbent article is outside the third target range.
  • the target range is determined according to the transport speed of the transport device. It is because the liquid of the quantity according to the conveyance speed of the product, semi-finished product, or raw material of an absorbent article can be applied to the product, semi-finished product, or raw material of an absorbent article.
  • a method of applying a liquid having a viscosity in a range of 0.05 to 4 Pa ⁇ s to a product, a semi-finished product, or a material of an absorbent article being conveyed by a conveying device A tank containing the liquid; A nozzle for applying the liquid to the product, semi-finished product or material; A pump for supplying the liquid in the tank to the nozzle via a tube; A liquid meter disposed in a tube between the pump and the nozzle to detect the amount of liquid supplied from the pump to the nozzle; Comprising Depending on the application equipment, Applying the liquid to a product, semi-finished product or material of the absorbent article; Controlling the pump supply based on the amount of liquid detected by the liquid meter; including, A method is provided.
  • FIG. 1 shows an application apparatus 1 that applies a low-viscosity liquid to an object 5 being conveyed by a conveyance apparatus 3.
  • the object 5 is a product, semi-finished product, or material of an absorbent article.
  • Absorbent articles include paper diapers and sanitary napkins.
  • the target object 5 is comprised from the sheet
  • the application apparatus 1 includes a tank 11 that stores liquid and a nozzle 13 that applies liquid to the sheet 5.
  • the application apparatus 1 further includes a pump 17 that supplies the liquid stored in the tank 11 to the nozzle 13 via the tube 15.
  • the supply amount of the pump 17 can be changed.
  • the tank 11 is disposed at a position higher than the pump 17. As a result, the liquid in the tank 11 reaches the pump 17 by its own weight.
  • a filter 19 for removing impurities mixed in the liquid is disposed in the tube 15 between the tank 11 and the pump 17.
  • a liquid meter 21 is disposed in the portion of the tube 15 between the pump 17 and the nozzle 13.
  • the liquid meter 21 detects the amount of liquid flowing through the tube 15, that is, the amount of liquid actually applied to the sheet 5. Therefore, the amount of liquid actually applied to the sheet 5 can be easily detected.
  • the nozzle 13 includes a liquid ejection path (not shown), a pneumatically driven nozzle valve (not shown) for opening or closing the liquid ejection path, and an air chamber (not shown).
  • a liquid ejection path (not shown)
  • a pneumatically driven nozzle valve (not shown) for opening or closing the liquid ejection path
  • an air chamber (not shown).
  • Application device 1 further includes a first compressor 23.
  • the air chamber of the nozzle 13 and the first compressor 23 are connected via a first air tube 25.
  • a nozzle valve opening / closing electromagnetic valve 27 is disposed in a first air tube 25 between the nozzle 13 and the first compressor 23.
  • the nozzle valve opening / closing solenoid valve 27 When the nozzle valve opening / closing solenoid valve 27 is opened, air pressure is applied to the nozzle 13 to open the nozzle valve.
  • the nozzle valve opening / closing electromagnetic valve 27 is closed, the nozzle valve is closed.
  • the nozzle 13 includes an air flow passage (not shown) in communication with or adjacent to the liquid flow passage.
  • Application device 1 further includes a second compressor 29.
  • the air flow passage of the nozzle 13 is connected to the second compressor 29 via the second air tube 31.
  • Another electromagnetic valve 33 and a regulator 35 for adjusting the air pressure in the second air tube 31 are attached to the second air tube 31.
  • the electromagnetic valve 33 When the electromagnetic valve 33 is opened, compressed air is ejected from the air flow passage, and thus the liquid ejected from the liquid flow passage is applied to the sheet 5 by being atomized.
  • the electromagnetic valve 33 is closed, the supply of compressed air to the air flow passage is stopped.
  • liquid is ejected from the nozzle 13 without using compressed air.
  • the liquid is applied to the sheet 5 by, for example, a brush or a roller.
  • the liquid is applied discontinuously from the applying device 1 to the sheet 5. In another embodiment, the liquid is applied to the sheet 5 continuously from the application device 1.
  • the conveying device 3 includes a driving roller 3a and a driven roller 3b in order to convey the sheet 5 in a substantially horizontal direction.
  • the nozzle 13 is disposed below the sheet 5.
  • the conveying device 3 of this embodiment includes a speedometer 37 for detecting the conveying speed of the sheet 5.
  • the liquid has a viscosity in the range of 0.05 to 4 Pa ⁇ s at least when applied to the sheet 5.
  • the liquid has a viscosity in the range of 0.05 to 4 Pa ⁇ s at 20 to 25 ° C. and 1 atm.
  • the liquid is a modifier for rapidly transferring menstrual blood from the top sheet to the absorber.
  • skin care agents pH adjusting agents, antibacterial agents, fragrances, fragrances and the like.
  • the amount of liquid supplied from the application apparatus 1 to the sheet 5 is considerably small, and is about 10 ml / min.
  • the liquid meter 21 used in this embodiment is a Coriolis flow meter.
  • the Coriolis flow meter is suitable for measuring such a small amount of liquid.
  • the liquid meter 21 is in other forms.
  • the Coriolis flow meter is a flow meter that uses the principle of Coriolis force. That is, for example, when a tube is vibrated while a liquid to be measured is circulated in a U-shaped or linear tube, the tube is distorted. The magnitude of this strain depends on the flow rate of liquid flowing through the tube. Accordingly, the liquid flow rate can be detected by detecting the magnitude of the tube distortion.
  • the application device 1 includes an alarm device 41.
  • the alarm device 41 issues an alarm to the user by generating sound, light, or vibration.
  • Application device 1 further includes a controller 39.
  • the controller 39 is constituted by a computer having a CPU (microprocessor), a memory, an input port, and an output port, for example.
  • the liquid meter 21 and the speedometer 37 of the transfer device 3 are connected to the input port of the controller 39.
  • the drive roller 3 a of the transport device 3, the pump 17, the nozzle valve opening / closing electromagnetic valve 27, and the alarm device 41 are connected to the output port of the controller 39.
  • the transport device 3, the pump 17, the electromagnetic valve 27 and the alarm device 41 are controlled based on a signal from the controller 39.
  • the supply amount of the pump 17 is controlled based on the liquid amount detected by the liquid meter 21.
  • the supply amount of the pump 17 is controlled so that the liquid amount is within the first target range. As a result, the amount of liquid can be maintained optimally. When it is determined that the liquid amount is within the first target range, the supply amount of the pump 17 is maintained.
  • the alarm device 41 When it is determined that the liquid amount is outside the third target range, the alarm device 41 is activated. As a result, the user can easily know that the liquid amount is outside the third target range. When it is determined that the amount of liquid is within the third target range, the alarm device 41 is deactivated.
  • the first target range, the second target range, and the third target range are the types of liquid to be applied to the sheet 5, the object to which the liquid is applied, the parameters such as the conveyance speed of the sheet 5, and how much It is determined by quality control reasons regarding whether or not the liquid amount error is acceptable.
  • each target range is determined according to the conveyance speed of the sheet 5 of the conveyance device 3. That is, as the conveyance speed of the sheet 5 increases, the upper limit value and the lower limit value of each target range increase.
  • the relationship between each target range and the conveyance speed of the sheet 5 is stored in advance in the memory of the controller 39 in the form of a map.
  • each target range is constant.
  • the second target range is wider than the first target range. That is, the upper limit value of the second target range is larger than the upper limit value of the first target range, and the lower limit value of the second target range is smaller than the lower limit value of the first target range.
  • the third target range is wider than the first target range and narrower than the second target range. That is, the upper limit value of the third target range is larger than the upper limit value of the first target range and smaller than the upper limit value of the second target range.
  • the lower limit value of the third target range is smaller than the lower limit value of the first target range and larger than the lower limit value of the second target range.
  • the upper limit value of the third target range is less than or equal to the upper limit value of the first target range and greater than or equal to the upper limit value of the second target range. Further, the lower limit value of the third target range is not less than the lower limit value of the first target range and not more than the lower limit value of the second target range.
  • FIG. 2 is a time chart for explaining an embodiment of the present invention.
  • the supply amount of the pump 17 is made constant.
  • the supply amount of the pump 17 is decreased.
  • the supply amount of the pump 17 is made constant again.
  • the supply amount of the pump 17 is made constant again.
  • the supply amount of the pump 17 is made constant again.
  • the supply amount of the pump 17 is made constant again. In this way, the supply amount of the pump 17 is controlled so that the liquid amount is maintained within the first target range R1. Note that the amount of increase or decrease in the supply amount of the pump can be arbitrarily determined.
  • the supply amount of the pump 17 is decreased.
  • the alarm device 41 is activated.
  • the liquid application amount returns to the third target range R3 for some reason at time T10 the alarm device 41 is stopped.
  • the supply amount of the pump 17 is made constant again.
  • the supply amount of the pump 17 is increased.
  • the alarm device 41 is activated again.
  • the liquid amount reaches the second target range R2 at the subsequent time T14. That is, the solenoid valve 27 for opening and closing the nozzle valve is closed to close the nozzle valve and the supply of liquid by the pump 17 is stopped.
  • the conveyance of the sheet 5 by the conveyance device 3 is stopped.
  • the target ranges R1, R2, and R3 are determined according to the conveyance speed of the sheet 5.
  • FIG. 3 shows a case where the conveyance speed of the sheet 5 changes, and therefore the first target range R1 changes from R11 to R12.
  • the application of the liquid is started at t1, and the first target range R11 corresponding to the transport speed of the transport device 3 is determined.
  • the supply amount of the pump 17 is controlled so that the liquid amount is maintained within the first target range R11.
  • the transport speed of the transport device 3 is changed, and accordingly, the first target range is changed to R12.
  • the supply amount of the pump 17 is controlled so that the application amount of the liquid falls within another first target range R12.
  • the rise time is set again when the transport speed is changed. That is, immediately after the transport speed is changed, it is not determined whether the liquid amount is within the second target range R2 and the third target range R3.
  • the amount of liquid supplied from the application apparatus 1 to the sheet 5 is about 10 ml / min.
  • the first target range R1, the second target range R2, and the third target range R3 are included in the liquid amount range of 1 to 20 ml / min. That is, it is preferable that the lower limit value of each target range R1, R2, R3 is set to 1 ml / min or more and the upper limit value is set to 20 ml / min or less. This is because if the amount of liquid is less than 1 ml / min, the effect of the modifier may not be obtained.
  • the amount of the liquid is too small, so that the liquid cannot be applied to the sheet 5 evenly, and liquid distribution unevenness may occur, resulting in unstable quality. Furthermore, if the amount of liquid is more than 20 ml / min, the liquid applied to the sheet 5 may not stay on the surface of the sheet 5, but may adhere to the apparatus in the subsequent process and contaminate them. Because there is.
  • FIG. 4 a routine for controlling the application of the liquid by the application apparatus 1 of this embodiment will be described with reference to FIGS. 4 and 5.
  • FIG. 4 a routine for controlling the application of the liquid by the application apparatus 1 of this embodiment will be described with reference to FIGS. 4 and 5.
  • step 101 the controller 39 acquires the transport speed of the transport device 3 from the speedometer 37.
  • step 103 the first, second, and third target ranges R1, R2, and R3 are determined based on the transport speed of the transport device 3 acquired as described above.
  • step 105 the amount of liquid detected by the liquid meter 21, that is, the amount of liquid applied to the sheet 5 is acquired.
  • step 106 it is determined whether or not the rise time described in FIG. 2 has elapsed. If the rise time has not elapsed, the process proceeds to step 117. In step 106, if the rise time has elapsed, the process proceeds to step 107.
  • Step 107 it is determined whether or not the liquid amount is within the third target range R3. If the liquid amount is not within the third target range R3, the process proceeds to step 109. In step 109, the alarm device 41 is activated. Next, the process proceeds to step 117. In step 107, if the liquid application amount is within the third target range R3, the process proceeds to step 110, where the alarm device 41 is deactivated. Next, the routine proceeds to step 111.
  • step 111 it is determined whether or not the liquid is within the second target range R2. If the liquid amount is not within the second target range R2, the process proceeds to step 113. In step 113, the nozzle valve of the nozzle 13 is closed and the operation of the pump 17 is stopped, and the application of the liquid to the sheet 5 is stopped. In the following step 115, the transport device 3 is stopped. This routine is then terminated. In step 111, if the liquid amount is within the second target range R2, the process proceeds to step 117.
  • step 117 it is determined whether or not the liquid amount is larger than the upper limit value of the first target range R1. If the liquid amount is larger than the upper limit value of the first target range R1, the process proceeds to step 119, the liquid supply amount of the pump 17 is decreased, and the process further proceeds to step 125. In step 117, if the liquid amount is not larger than the upper limit value of the first target range R1, the process proceeds to step 121. In step 121, it is determined whether or not the liquid amount is smaller than the lower limit value of the first target range R1. If the liquid amount is less than the lower limit value of the first target range R1, the process proceeds to step 123, the liquid supply amount of the pump 17 is increased, and the process further proceeds to step 125.
  • step 121 if the liquid amount is not smaller than the lower limit value of the first target range R1, the process proceeds to step 125.
  • step 125 in order to apply liquid from the nozzle 13 to the sheet 5, the nozzle valve of the nozzle 13 is opened.
  • step 127 it is determined whether or not the production of the absorbent article is finished. If the production of the absorbent article is finished, this routine is finished. If production is continued, the process returns to step 101 and the above steps are repeated.
  • At least one of the liquid amount detected by the flow meter 21, the determination result of whether or not the liquid amount is within the target range, and the liquid amount is connected to the output port of the controller 39. It is displayed on a display (not shown). In this case, the user can manually control the supply amount of the pump 17 based on the display.
  • the controller 39 determines whether or not the flow rate detected by the liquid meter 21 is within the target range, and the liquid detected by the liquid meter 21 by the determination device.
  • the supply amount of the pump 17 is controlled so that the amount of liquid detected by the liquid meter 21 is within the first target range R1.
  • An application stopping device that stops the application operation of the application device 1 when the control device and the determination device determine that the amount of liquid detected by the liquid meter is outside the second target range R2.
  • the amount of liquid outside the third target range R3 When it is determined that constitute a warning device for actuating the alarm 41.
  • the application apparatus 1 has only one nozzle 13.
  • the application apparatus 1 includes a plurality of nozzles 13.
  • the adaptation apparatus 1 can include a number of liquid meters 21 corresponding to the number of nozzles 13.
  • one common liquid meter 21 can be provided for the plurality of nozzles 13.
  • the manufactured sanitary napkin may be folded into three or four and individually wrapped.
  • the top sheet and the back sheet of the sanitary napkin are in contact with each other.
  • an adhesive for bonding the sanitary napkin and the shorts is usually applied to the back sheet of the sanitary napkin.
  • the liquid may reach the adhesive of the back sheet without staying on the sheet 5, and may reduce the adhesive strength of the adhesive. There is. Therefore, when the absorbent article to be manufactured is a sanitary napkin, the amount of liquid needs to be managed more strictly than when the absorbent article to be manufactured is a paper diaper.

Abstract

An application device (1), which applies a liquid with a viscosity in the range of 0.05 - 4 Pa∙s on an absorbent article product, semi-finished product or raw material that is being conveyed by a conveyance device (3), is equipped with: a tank (11), which holds the liquid; a nozzle (13), which applies the liquid on the product, semi-finished product or raw material; a pump (17) that supplies the liquid inside the tank to the nozzle via a tube (15); and a liquid scale disposed in the tube between the pump and the nozzle for detecting the volume of liquid supplied from the pump to the nozzle.

Description

適用装置及び適用方法Application apparatus and application method
　本発明は適用装置及び適用方法に関する。 The present invention relates to an application apparatus and an application method.
　特許文献１には、紙オムツや生理用ナプキン等の吸収性物品の肌触り、風合い等を改善するために、ローション、柔軟剤、水溶性抗菌剤などの低粘度の液体を、吸収性物品を構成するシートに適用する方法が開示されている。 In Patent Document 1, in order to improve the feel and texture of absorbent articles such as paper diapers and sanitary napkins, the absorbent article is composed of a low-viscosity liquid such as a lotion, a softener, and a water-soluble antibacterial agent. A method of applying to a sheet is disclosed.
特開２００４－２２９９５９号公報JP 2004-229959 A
　シートに液体を適用する場合、シートに適切な量の液体を適用する必要がある。このため、シートに実際に適用された液体量を検出することが必要である。 When applying liquid to the sheet, it is necessary to apply an appropriate amount of liquid to the sheet. For this reason, it is necessary to detect the amount of liquid actually applied to the sheet.
　しかしながら、特許文献１では、このことについて何ら言及されていない。 However, Patent Document 1 does not mention anything about this.
　したがって、本発明の目的は、吸収性物品の製品、半製品又は素材に実際に適用された液体量を検出することができる適用装置及び適用方法を提供することにある。 Therefore, an object of the present invention is to provide an application device and an application method capable of detecting the amount of liquid actually applied to a product, semi-finished product or material of an absorbent article.
　上記課題を解決するために、本発明によれば、
　搬送装置によって搬送されている吸収性物品の製品、半製品又は素材に対して、０．０５～４Ｐａ・ｓの範囲の粘度を有する液体を適用する適用装置であって、
　　　前記液体を収容するタンクと、
　　　前記液体を前記製品、半製品又は素材に対して適用するノズルと、
　　　前記タンク内の液体を、チューブを介して前記ノズルに供給するポンプと、
　　　前記ポンプから前記ノズルに供給される液体の量を検出するために、前記ポンプと前記ノズルとの間の前記チューブに配置された液量計と、
　を具備する、
　適用装置が提供される。 In order to solve the above problems, according to the present invention,
An application device that applies a liquid having a viscosity in the range of 0.05 to 4 Pa · s to a product, semi-finished product, or material of an absorbent article that is being transported by a transport device,
A tank containing the liquid;
A nozzle for applying the liquid to the product, semi-finished product or material;
A pump for supplying the liquid in the tank to the nozzle via a tube;
A liquid meter disposed in the tube between the pump and the nozzle to detect the amount of liquid supplied from the pump to the nozzle;
Comprising
An application device is provided.
　さらに、前記液量計によって検出された液体の量に基づいて、ポンプの供給量を制御すると好ましい。吸収性物品の製品、半製品又は素材に実際に適用される液体の量を適切に制御することができるからである。 Furthermore, it is preferable to control the supply amount of the pump based on the amount of liquid detected by the liquid meter. This is because the amount of liquid actually applied to the product, semi-finished product or material of the absorbent article can be appropriately controlled.
　さらに、前記液量計によって検出された液体の量が目標範囲内にあるか否かを判断する判断装置をさらに具備すると好ましい。吸収性物品の製品、半製品又は素材に実際に適用される液体の量が目標範囲内にあるか否かをユーザが認知することができるからである。 Furthermore, it is preferable to further comprise a determination device for determining whether or not the amount of liquid detected by the liquid meter is within a target range. This is because the user can recognize whether or not the amount of liquid actually applied to the product, semi-finished product, or material of the absorbent article is within the target range.
　さらに、前記目標範囲は第一の目標範囲を含み、前記判断装置により、前記液量計によって検出された液体の量が前記第一の目標範囲外であると判断されたときに、前記液量計によって検出された液体の量が前記第一の目標範囲内になるように、前記ポンプの供給量を制御する制御装置をさらに備えると好ましい。吸収性物品の製品、半製品又は素材に、第一の目標範囲内の量の液体を適用することができるからである。 Furthermore, the target range includes a first target range, and when the determination device determines that the amount of liquid detected by the liquid meter is outside the first target range, the liquid amount It is preferable to further include a control device for controlling the supply amount of the pump so that the amount of liquid detected by the meter falls within the first target range. This is because an amount of liquid within the first target range can be applied to the product, semi-finished product, or material of the absorbent article.
　さらに、前記目標範囲は第二の目標範囲を含み、前記判断装置により、前記液量計によって検出された液体の量が前記第二の目標範囲外であると判断されたときに、前記適用装置の適用作用を停止させる適用停止装置をさらに備えると好ましい。吸収性物品の製品、半製品又は素材に第二の目標範囲外の量の液体が適用されるのを防ぐことができるからである。 Further, the target range includes a second target range, and when the determination device determines that the amount of liquid detected by the liquid meter is outside the second target range, the application device It is preferable to further include an application stopping device for stopping the application action. It is because it can prevent that the liquid of the quantity outside a 2nd target range is applied to the product of an absorbent article, a semi-finished product, or a raw material.
　さらに、前記判断装置により、前記液量計によって検出された液体の量が前記第二の目標範囲外であると判断されたときに、前記搬送装置を停止させる搬送停止装置をさらに備えると好ましい。吸収性物品の製品、半製品又は素材への液体の適用が停止されたときに、吸収性物品の製品、半製品又は素材の無駄な搬送を防ぐことができるからである。 Furthermore, it is preferable that the apparatus further includes a transport stop device that stops the transport device when the determination device determines that the amount of the liquid detected by the liquid meter is outside the second target range. This is because when the application of the liquid to the product, semi-finished product or raw material of the absorbent article is stopped, wasteful conveyance of the product, semi-finished product or raw material of the absorbent article can be prevented.
　さらに、前記目標範囲は第三の目標範囲を含み、前記判断装置により、前記液量計によって検出された液体の量が前記第三の目標範囲外であると判断されたときに、警報器を作動させる警報装置をさらに備えると好ましい。吸収性物品の製品、半製品又は素材に実際に適用された液体の量が第三の目標範囲外であることを、ユーザが認知できるからである。 Further, the target range includes a third target range, and when the determination device determines that the amount of liquid detected by the liquid meter is out of the third target range, an alarm is provided. It is preferable to further provide an alarm device to be activated. This is because the user can recognize that the amount of liquid actually applied to the product, semi-finished product, or material of the absorbent article is outside the third target range.
　さらに、前記目標範囲が、前記搬送装置の搬送速度に応じて定められると好ましい。吸収性物品の製品、半製品又は素材の搬送速度に応じた量の液体を吸収性物品の製品、半製品又は素材に適用できるからである。 Furthermore, it is preferable that the target range is determined according to the transport speed of the transport device. It is because the liquid of the quantity according to the conveyance speed of the product, semi-finished product, or raw material of an absorbent article can be applied to the product, semi-finished product, or raw material of an absorbent article.
　さらに、上記課題を解決するために、本発明によれば、
　搬送装置によって搬送されている吸収性物品の製品、半製品又は素材に対して、０．０５～４Ｐａ・ｓの範囲の粘度を有する液体を適用する方法であって、
　　　　　　　　　前記液体を収容するタンクと、
　　　　　　　　　前記液体を前記製品、半製品又は素材に対して適用するノズルと、
　　　　　　　　　前記タンク内の液体を、チューブを介して前記ノズルに供給するポンプと、
　　　　　　　　　前記ポンプからノズルに供給される液体の量を検出するために、前記ポンプと前記ノズルとの間のチューブに配置された液量計と、
　　　　　　　を具備する、
　　　　　適用装置によって、
　　　前記吸収性物品の製品、半製品又は素材に前記液体を適用する段階と、
　　　前記液量計によって検出された液体の量に基づいて、ポンプの供給量を制御する段階と、
　を含む、
　方法が提供される。 Furthermore, in order to solve the above problems, according to the present invention,
A method of applying a liquid having a viscosity in a range of 0.05 to 4 Pa · s to a product, a semi-finished product, or a material of an absorbent article being conveyed by a conveying device,
A tank containing the liquid;
A nozzle for applying the liquid to the product, semi-finished product or material;
A pump for supplying the liquid in the tank to the nozzle via a tube;
A liquid meter disposed in a tube between the pump and the nozzle to detect the amount of liquid supplied from the pump to the nozzle;
Comprising
Depending on the application equipment,
Applying the liquid to a product, semi-finished product or material of the absorbent article;
Controlling the pump supply based on the amount of liquid detected by the liquid meter;
including,
A method is provided.
　本発明により、低粘度の液体を吸収性物品の製品、半製品又は素材に適用するときに、どれだけの量の液体を実際に適用したかを検出することができる。 According to the present invention, it is possible to detect how much liquid is actually applied when a low-viscosity liquid is applied to a product, semi-finished product or material of an absorbent article.
　以下、添付図面と本発明の好適な実施形態の記載から、本発明を一層十分に理解できるであろう。 Hereinafter, the present invention will be more fully understood from the accompanying drawings and the description of preferred embodiments of the present invention.
本発明の実施例の適用装置の概略図。Schematic of the application apparatus of the Example of this invention. 適用装置の作用を説明するタイムチャート。The time chart explaining the effect | action of an application apparatus. シートの搬送速度が変化したときの適用装置の作用を説明するタイムチャート。The time chart explaining the effect | action of an application apparatus when the conveyance speed of a sheet | seat changes. 適用制御を実行するフローチャート。The flowchart which performs application control. 適用制御を実行するフローチャート。The flowchart which performs application control.
　これより、図１～５を用いて、本発明の実施例を説明する。 Now, an embodiment of the present invention will be described with reference to FIGS.
　図１は、搬送装置３によって搬送されている対象物５に対して、低粘度の液体を適用する適用装置１を示している。対象物５は、吸収性物品の製品、半製品又は素材である。吸収性物品は、紙オムツや生理用ナプキン等を含む。本発明の実施例では、対象物５は、生理用ナプキンのトップシートを形成するシートから構成される。 FIG. 1 shows an application apparatus 1 that applies a low-viscosity liquid to an object 5 being conveyed by a conveyance apparatus 3. The object 5 is a product, semi-finished product, or material of an absorbent article. Absorbent articles include paper diapers and sanitary napkins. In the Example of this invention, the target object 5 is comprised from the sheet | seat which forms the top sheet | seat of a sanitary napkin.
　図１に示すように、適用装置１は、液体を収容するタンク１１と、液体をシート５に適用するノズル１３を備える。適用装置１はさらに、タンク１１に収容されている液体を、チューブ１５を介してノズル１３に供給するポンプ１７を具備する。ポンプ１７の供給量は変更可能である。タンク１１はポンプ１７よりも高い位置に配置される。その結果、タンク１１内の液体は、液体の自重によってポンプ１７に達する。また、タンク１１とポンプ１７との間のチューブ１５には、液体に混入している不純物を除去するためのフィルタ１９が配置される。 As shown in FIG. 1, the application apparatus 1 includes a tank 11 that stores liquid and a nozzle 13 that applies liquid to the sheet 5. The application apparatus 1 further includes a pump 17 that supplies the liquid stored in the tank 11 to the nozzle 13 via the tube 15. The supply amount of the pump 17 can be changed. The tank 11 is disposed at a position higher than the pump 17. As a result, the liquid in the tank 11 reaches the pump 17 by its own weight. A filter 19 for removing impurities mixed in the liquid is disposed in the tube 15 between the tank 11 and the pump 17.
　ポンプ１７とノズル１３との間のチューブ１５の部分に液量計２１が配置される。液量計２１は、チューブ１５内を流通する液体の量、すなわちシート５に実際に適用された液体の量を検出する。したがって、シート５に実際に適用された液体の量を簡単に検出することができる。 A liquid meter 21 is disposed in the portion of the tube 15 between the pump 17 and the nozzle 13. The liquid meter 21 detects the amount of liquid flowing through the tube 15, that is, the amount of liquid actually applied to the sheet 5. Therefore, the amount of liquid actually applied to the sheet 5 can be easily detected.
　本発明の実施例では、ノズル１３は、液体噴出路（図示しない）と、液体噴出路を開放又は閉鎖する、空気圧駆動式のノズル弁（図示しない）と、空気室（図示しない）とをその内部に備える。すなわち、ノズル１３の空気室に空気圧が印加されると、ノズル弁が開弁され、液体が液体流通路から噴出される。これに対し、空気室への空気圧の印加が停止されると、ノズル弁が閉弁され、液体の噴出が停止される。 In the embodiment of the present invention, the nozzle 13 includes a liquid ejection path (not shown), a pneumatically driven nozzle valve (not shown) for opening or closing the liquid ejection path, and an air chamber (not shown). Prepare inside. That is, when air pressure is applied to the air chamber of the nozzle 13, the nozzle valve is opened and the liquid is ejected from the liquid flow path. On the other hand, when the application of air pressure to the air chamber is stopped, the nozzle valve is closed and the ejection of liquid is stopped.
　適用装置１はさらに第一のコンプレッサ２３を備える。ノズル１３の空気室及び第一のコンプレッサ２３は、第一のエアチューブ２５を介して接続される。この例では、ノズル１３と第一のコンプレッサ２３との間の第一のエアチューブ２５にノズル弁開閉用電磁弁２７が配置される。このノズル弁開閉用電磁弁２７が開弁されると、ノズル１３に空気圧が印加されてノズル弁が開弁される。ノズル弁開閉用電磁弁２７が閉弁されると、ノズル弁が閉弁される。 Application device 1 further includes a first compressor 23. The air chamber of the nozzle 13 and the first compressor 23 are connected via a first air tube 25. In this example, a nozzle valve opening / closing electromagnetic valve 27 is disposed in a first air tube 25 between the nozzle 13 and the first compressor 23. When the nozzle valve opening / closing solenoid valve 27 is opened, air pressure is applied to the nozzle 13 to open the nozzle valve. When the nozzle valve opening / closing electromagnetic valve 27 is closed, the nozzle valve is closed.
　また、ノズル１３は、液体流通路に連通して又は隣接して、空気流通路（図示しない）を備える。 The nozzle 13 includes an air flow passage (not shown) in communication with or adjacent to the liquid flow passage.
　適用装置１はさらに第二のコンプレッサ２９を備える。ノズル１３の空気流通路は第二のエアチューブ３１を介して第二のコンプレッサ２９に接続される。第二のエアチューブ３１には別の電磁弁３３と、第二のエアチューブ３１内の空気圧を調節するためのレギュレータ３５が取り付けられている。電磁弁３３が開弁されると、空気流通路から圧縮空気が噴出され、したがって液体流通路から噴出される液体がシート５に微粒化して適用される。電磁弁３３が閉弁されると、空気流通路への圧縮空気の供給が停止される。 Application device 1 further includes a second compressor 29. The air flow passage of the nozzle 13 is connected to the second compressor 29 via the second air tube 31. Another electromagnetic valve 33 and a regulator 35 for adjusting the air pressure in the second air tube 31 are attached to the second air tube 31. When the electromagnetic valve 33 is opened, compressed air is ejected from the air flow passage, and thus the liquid ejected from the liquid flow passage is applied to the sheet 5 by being atomized. When the electromagnetic valve 33 is closed, the supply of compressed air to the air flow passage is stopped.
　別の実施例では、圧縮空気を使用しないで、液体がノズル１３から噴出される。更に別の実施例では、例えばハケやローラ等によって液体がシート５に塗布される。 In another embodiment, liquid is ejected from the nozzle 13 without using compressed air. In yet another embodiment, the liquid is applied to the sheet 5 by, for example, a brush or a roller.
　本発明の実施例では、液体は適用装置１からシート５に不連続に適用される。別の実施例では、液体は適用装置１から連続的にシート５に適用される。 In the embodiment of the present invention, the liquid is applied discontinuously from the applying device 1 to the sheet 5. In another embodiment, the liquid is applied to the sheet 5 continuously from the application device 1.
　一方、搬送装置３は、シート５をほぼ水平方向に搬送するために、駆動ローラ３ａ及び従動ローラ３ｂを含む。本発明の実施例では、上述のノズル１３はシート５の下方に配置されている。 On the other hand, the conveying device 3 includes a driving roller 3a and a driven roller 3b in order to convey the sheet 5 in a substantially horizontal direction. In the embodiment of the present invention, the nozzle 13 is disposed below the sheet 5.
　また、この実施例の搬送装置３は、シート５の搬送速度を検出するための速度計３７を備える。 Further, the conveying device 3 of this embodiment includes a speedometer 37 for detecting the conveying speed of the sheet 5.
　この実施例では、液体は、少なくともシート５に適用される時点において、０．０５～４Ｐａ・ｓの範囲の粘度を有する。例えば、液体は、２０～２５℃、１気圧において、０．０５～４Ｐａ・ｓの範囲の粘度を有する。 In this embodiment, the liquid has a viscosity in the range of 0.05 to 4 Pa · s at least when applied to the sheet 5. For example, the liquid has a viscosity in the range of 0.05 to 4 Pa · s at 20 to 25 ° C. and 1 atm.
　なお、液体の粘度は以下のように検出される。所望の温度において、ＪＩＳ　Ｋ　２２８３に準じてキャノン－フェンスケ粘度計により動粘度を検出し、さらにＪＩＳ　Ｋ　２２４９に準じて振動式密度計により密度を検出する。上記結果より、以下の式を用いてその温度における粘度を算出する。
　　　粘度（Ｐａ・ｓ）＝動粘度（ｍ２／ｓ）×密度（ｋｇ／ｍ３） The viscosity of the liquid is detected as follows. At a desired temperature, the kinematic viscosity is detected with a Canon-Fenske viscometer according to JIS K 2283, and the density is further detected with a vibratory density meter according to JIS K 2249. From the above results, the viscosity at that temperature is calculated using the following equation.
Viscosity (Pa · s) = Kinematic viscosity (m 2 / s) × Density (kg / m 3 )
　この実施例において、液体は、経血をトップシートから吸収体へ速やかに移行させるための改質剤である。しかしながら、別の実施例では、スキンケア剤、ＰＨ調整剤、抗菌剤、芳香剤、香料等である。 In this example, the liquid is a modifier for rapidly transferring menstrual blood from the top sheet to the absorber. However, in other examples, skin care agents, pH adjusting agents, antibacterial agents, fragrances, fragrances and the like.
　この実施例の適用装置１において、適用装置１からシート５に供給される液体量はかなり少なく、１０ｍｌ／分程度である。このために、この実施例で使用される液量計２１はコリオリ式流量計である。コリオリ式流量計は、こうした少ない液体の量を計測するのに適している。しかしながら、別の実施例では、液量計２１は、他の形式である。 In the application apparatus 1 of this embodiment, the amount of liquid supplied from the application apparatus 1 to the sheet 5 is considerably small, and is about 10 ml / min. For this purpose, the liquid meter 21 used in this embodiment is a Coriolis flow meter. The Coriolis flow meter is suitable for measuring such a small amount of liquid. However, in other embodiments, the liquid meter 21 is in other forms.
　コリオリ式流量計は、コリオリの力の原理を利用した流量計である。すなわち、例えばＵ字形又は直線状のチューブ内に測定対象の液体を流通させつつチューブを振動させると、チューブに歪が生ずる。この歪の大きさはチューブ内を流通する液体流量に依存する。したがって、チューブの歪の大きさを検出すれば、液体流量を検出することができる。 The Coriolis flow meter is a flow meter that uses the principle of Coriolis force. That is, for example, when a tube is vibrated while a liquid to be measured is circulated in a U-shaped or linear tube, the tube is distorted. The magnitude of this strain depends on the flow rate of liquid flowing through the tube. Accordingly, the liquid flow rate can be detected by detecting the magnitude of the tube distortion.
　更に、適用装置１は警報器４１を備える。警報器４１は、音、光又は振動を発生することによって、ユーザに警報を発する。 Furthermore, the application device 1 includes an alarm device 41. The alarm device 41 issues an alarm to the user by generating sound, light, or vibration.
　適用装置１はさらに制御器３９を備える。制御器３９は例えば、ＣＰＵ（マイクロプロセッサ）、メモリ、入力ポート、及び出力ポートを備えたコンピュータから構成される。制御器３９の入力ポートには、液量計２１及び搬送装置３の速度計３７が接続される。制御器３９の出力ポートには、搬送装置３の駆動ローラ３ａ、ポンプ１７、ノズル弁開閉用電磁弁２７、及び警報器４１が接続される。搬送装置３、ポンプ１７、電磁弁２７及び警報器４１は制御器３９からの信号に基づいて制御される。 Application device 1 further includes a controller 39. The controller 39 is constituted by a computer having a CPU (microprocessor), a memory, an input port, and an output port, for example. The liquid meter 21 and the speedometer 37 of the transfer device 3 are connected to the input port of the controller 39. The drive roller 3 a of the transport device 3, the pump 17, the nozzle valve opening / closing electromagnetic valve 27, and the alarm device 41 are connected to the output port of the controller 39. The transport device 3, the pump 17, the electromagnetic valve 27 and the alarm device 41 are controlled based on a signal from the controller 39.
　本発明の実施例では、液量計２１によって検出された液体量に基づいてポンプ１７の供給量が制御される。 In the embodiment of the present invention, the supply amount of the pump 17 is controlled based on the liquid amount detected by the liquid meter 21.
　具体的には、液体量が第一の目標範囲内、第二の目標範囲内、第三の目標範囲内にあるか否かが判断される。その上で、液体量が第一の目標範囲外にあると判断されたときには、液体量が第一の目標範囲内になるようにポンプ１７の供給量が制御される。その結果、液体量を最適に維持できる。液体量が第一の目標範囲内にあると判断されたときには、ポンプ１７の供給量は維持される。 Specifically, it is determined whether or not the liquid amount is within the first target range, the second target range, and the third target range. In addition, when it is determined that the liquid amount is outside the first target range, the supply amount of the pump 17 is controlled so that the liquid amount is within the first target range. As a result, the amount of liquid can be maintained optimally. When it is determined that the liquid amount is within the first target range, the supply amount of the pump 17 is maintained.
　液体量が第二の目標範囲外であると判断されたときには、シート５への液体の適用が停止される。すなわち、ノズル１３のノズル弁が閉弁され、ポンプ１７が停止される。また、シート５の搬送が停止される。すなわち、搬送装置３の駆動ローラ３ａが停止される。その結果、液体及びシート５の無駄を省くことができる。液体量が第二の目標範囲内であると判断されたときには、シート５の搬送が継続され、シート５への液体の適用が継続される。 When it is determined that the amount of liquid is outside the second target range, application of the liquid to the sheet 5 is stopped. That is, the nozzle valve of the nozzle 13 is closed and the pump 17 is stopped. Further, the conveyance of the sheet 5 is stopped. That is, the drive roller 3a of the transport device 3 is stopped. As a result, waste of the liquid and the sheet 5 can be omitted. When it is determined that the liquid amount is within the second target range, the conveyance of the sheet 5 is continued and the application of the liquid to the sheet 5 is continued.
　液体量が第三の目標範囲外であると判断されたときには、警報器４１が作動される。その結果、液体量が第三の目標範囲外であることをユーザが簡単に知ることができる。液体量が第三の目標範囲内であると判断されたときには警報器４１が非作動にされる。 When it is determined that the liquid amount is outside the third target range, the alarm device 41 is activated. As a result, the user can easily know that the liquid amount is outside the third target range. When it is determined that the amount of liquid is within the third target range, the alarm device 41 is deactivated.
　第一の目標範囲、第二の目標範囲、第三の目標範囲は、シート５に対して適用すべき液体の種類、液体が適用される対象物、シート５の搬送速度などのパラメータ、どの程度の液体量の誤差を許容できるかに関する品質管理上の理由などによって決定される。この実施例では、各目標範囲は、搬送装置３のシート５の搬送速度に応じて決定される。すなわち、シート５の搬送速度が高くなるにつれて、各目標範囲の上限値及び下限値は大きくなる。なお、各目標範囲と、シート５の搬送速度との関係はあらかじめマップの形で制御器３９のメモリに記憶されている。別の実施例では、各目標範囲は一定である。 The first target range, the second target range, and the third target range are the types of liquid to be applied to the sheet 5, the object to which the liquid is applied, the parameters such as the conveyance speed of the sheet 5, and how much It is determined by quality control reasons regarding whether or not the liquid amount error is acceptable. In this embodiment, each target range is determined according to the conveyance speed of the sheet 5 of the conveyance device 3. That is, as the conveyance speed of the sheet 5 increases, the upper limit value and the lower limit value of each target range increase. The relationship between each target range and the conveyance speed of the sheet 5 is stored in advance in the memory of the controller 39 in the form of a map. In another embodiment, each target range is constant.
　なお、この実施例では、第二の目標範囲は、第一の目標範囲よりも広い。すなわち、第二の目標範囲の上限値は第一の目標範囲の上限値よりも大きく、第二の目標範囲の下限値は第一の目標範囲の下限値よりも小さい。また、第三の目標範囲は、第一の目標範囲よりも広く、第二の目標範囲よりも狭い。すなわち、第三の目標範囲の上限値は、第一の目標範囲の上限値よりも大きく、第二の目標範囲の上限値よりも小さい。また、第三の目標範囲の下限値は、第一の目標範囲の下限値よりも小さく、第二の目標範囲の下限値よりも大きい。別の実施例では、第三の目標範囲の上限値は、第一の目標範囲の上限値以下であり、第二の目標範囲の上限値以上である。また、第三の目標範囲の下限値は、第一の目標範囲の下限値以上であり、第二の目標範囲の下限値以下である。 In this embodiment, the second target range is wider than the first target range. That is, the upper limit value of the second target range is larger than the upper limit value of the first target range, and the lower limit value of the second target range is smaller than the lower limit value of the first target range. The third target range is wider than the first target range and narrower than the second target range. That is, the upper limit value of the third target range is larger than the upper limit value of the first target range and smaller than the upper limit value of the second target range. The lower limit value of the third target range is smaller than the lower limit value of the first target range and larger than the lower limit value of the second target range. In another embodiment, the upper limit value of the third target range is less than or equal to the upper limit value of the first target range and greater than or equal to the upper limit value of the second target range. Further, the lower limit value of the third target range is not less than the lower limit value of the first target range and not more than the lower limit value of the second target range.
　なお、適用装置１による液体の適用が開始されてから、あらかじめ定められた立ち上がり時間が経過するまでは、液体量が第二の目標範囲内及び第三の目標範囲内にあるかの判断は行われない。液体の適用が開始された直後に、適用作用を停止させ又は警報器を作動させるのは好ましくないからである。 It should be noted that it is determined whether the liquid amount is within the second target range and the third target range until a predetermined rise time elapses after the application of the liquid by the application device 1 is started. I will not. This is because it is not preferable to stop the application operation or activate the alarm immediately after the liquid application is started.
　図２は、本発明の実施例を説明するタイムチャートである。 FIG. 2 is a time chart for explaining an embodiment of the present invention.
　まず、時点Ｔ１において液体の適用が開始される。この時点Ｔ１において、搬送装置３の搬送速度に応じた第一の目標範囲Ｒ１、第二の目標範囲Ｒ２及び第三の目標範囲Ｒ３が決定される。ここでは、第一の目標範囲Ｒ１よりも液体量が少ないので、ポンプ１７の供給量が増加され、液体量が徐々に増加される。 First, application of liquid is started at time T1. At this time T1, the first target range R1, the second target range R2, and the third target range R3 corresponding to the transport speed of the transport device 3 are determined. Here, since the liquid amount is smaller than the first target range R1, the supply amount of the pump 17 is increased, and the liquid amount is gradually increased.
　次いで、時点Ｔ２になると、立ち上り時間が終了する。 Next, at time T2, the rise time ends.
　次いで、時点Ｔ３において、液体量が第一の目標範囲Ｒ１内に入ると、ポンプ１７の供給量が一定にされる。次いで、時点Ｔ４において、何らかの原因により、液体量が第一の目標範囲Ｒ１の上限値よりも多くなると、ポンプ１７の供給量が減少される。その後、時点Ｔ５において、液体量が第一の目標範囲Ｒ１内に戻ると、ポンプ１７の供給量が再び一定にされる。続いて、時点Ｔ６において、何らかの原因により、液体量が第一の目標範囲Ｒ１よりも少なくなると、ポンプ１７の供給量が増加される。次いで、時点Ｔ７において、液体の適用量が第一の目標範囲Ｒ１内に戻ると、ポンプ１７の供給量が再び一定にされる。このようにして、液体量が第一の目標範囲Ｒ１内に維持されるように、ポンプ１７の供給量が制御される。なお、ポンプの供給量の増量分及び減量分は任意に決定することができる。 Next, when the liquid amount enters the first target range R1 at time T3, the supply amount of the pump 17 is made constant. Next, at time T4, when the liquid amount exceeds the upper limit value of the first target range R1 for some reason, the supply amount of the pump 17 is decreased. After that, when the liquid amount returns to the first target range R1 at time T5, the supply amount of the pump 17 is made constant again. Subsequently, at time T6, when the amount of liquid becomes smaller than the first target range R1 for some reason, the supply amount of the pump 17 is increased. Next, when the liquid application amount returns to the first target range R1 at time T7, the supply amount of the pump 17 is made constant again. In this way, the supply amount of the pump 17 is controlled so that the liquid amount is maintained within the first target range R1. Note that the amount of increase or decrease in the supply amount of the pump can be arbitrarily determined.
　その後、時点Ｔ８において、液体の適用量が再び第一の目標範囲Ｒ１の上限値よりも多くなると、ポンプ１７の供給量が減少される。しかしながら、液体量が減少せず、時点Ｔ９において液体量が第三の目標範囲Ｒ３外に達すると、警報器４１が作動される。その後、時点Ｔ１０において、何らかの原因により、液体の適用量が第三の目標範囲Ｒ３内に戻ると、警報器４１が停止される。次いで、時点Ｔ１１において、液体の適用量が第一の目標範囲Ｒ１内に戻ると、ポンプ１７の供給量が再び一定にされる。 Thereafter, when the liquid application amount again exceeds the upper limit value of the first target range R1 at time T8, the supply amount of the pump 17 is decreased. However, if the amount of liquid does not decrease and the amount of liquid reaches outside the third target range R3 at time T9, the alarm device 41 is activated. Thereafter, when the liquid application amount returns to the third target range R3 for some reason at time T10, the alarm device 41 is stopped. Next, when the liquid application amount returns to the first target range R1 at time T11, the supply amount of the pump 17 is made constant again.
　続いて、時点Ｔ１２において、再び液体量が再び第一の適用内意Ｒ１の下限値よりも少なくなると、ポンプ１７の供給量が増加される。しかしながら、液体量が増加せず、時点Ｔ１３において、液体量が第三の目標範囲Ｒ３外に達すると、警報器４１が再び作動される。続く時点Ｔ１４において、液体量が第二の目標範囲Ｒ２外に達すると、液体の適用が停止される。すなわち、ノズル弁開閉用電磁弁２７が閉弁されてノズル弁が閉鎖されると共にポンプ１７による液体の供給が停止される。同時に、搬送装置３によるシート５の搬送が停止される。 Subsequently, when the liquid amount again becomes lower than the lower limit value of the first application intent R1 at time T12, the supply amount of the pump 17 is increased. However, if the amount of liquid does not increase and the amount of liquid reaches outside the third target range R3 at time T13, the alarm device 41 is activated again. When the liquid amount reaches the second target range R2 at the subsequent time T14, the application of the liquid is stopped. That is, the solenoid valve 27 for opening and closing the nozzle valve is closed to close the nozzle valve and the supply of liquid by the pump 17 is stopped. At the same time, the conveyance of the sheet 5 by the conveyance device 3 is stopped.
　上述したように、各目標範囲Ｒ１，Ｒ２，Ｒ３はシート５の搬送速度に応じて決定される。図３は、シート５の搬送速度が変化し、したがって第一の目標範囲Ｒ１がＲ１１からＲ１２に変化した場合を示している。 As described above, the target ranges R1, R2, and R3 are determined according to the conveyance speed of the sheet 5. FIG. 3 shows a case where the conveyance speed of the sheet 5 changes, and therefore the first target range R1 changes from R11 to R12.
　図３を参照すると、ｔ１において液体の適用が開始され、搬送装置３の搬送速度に応じた第一の目標範囲Ｒ１１が決定される。その結果、図２において説明されたように、液体量が第一の目標範囲Ｒ１１内に維持されるように、ポンプ１７の供給量が制御される。その後、時点ｔ２において、搬送装置３の搬送速度が変更され、それに伴って第一の目標範囲がＲ１２に変更される。その後、液体の適用量が、別の第一の目標範囲Ｒ１２内になるように、ポンプ１７の供給量が制御される。以上のように、搬送装置３の搬送速度が変更されても、適切に液体の適用量が制御される。別の実施例では、搬送速度が変更されると、再度立ち上り時間が設定される。すなわち、搬送速度が変更された直後は、液体量が第二の目標範囲Ｒ２内及び第三の目標範囲Ｒ３内にあるかの判断は行われない。 Referring to FIG. 3, the application of the liquid is started at t1, and the first target range R11 corresponding to the transport speed of the transport device 3 is determined. As a result, as described in FIG. 2, the supply amount of the pump 17 is controlled so that the liquid amount is maintained within the first target range R11. Thereafter, at the time point t2, the transport speed of the transport device 3 is changed, and accordingly, the first target range is changed to R12. Thereafter, the supply amount of the pump 17 is controlled so that the application amount of the liquid falls within another first target range R12. As described above, even when the transport speed of the transport device 3 is changed, the liquid application amount is appropriately controlled. In another embodiment, the rise time is set again when the transport speed is changed. That is, immediately after the transport speed is changed, it is not determined whether the liquid amount is within the second target range R2 and the third target range R3.
　上述したように、この実施例の適用装置１において、適用装置１からシート５に供給される液体量は、１０ｍｌ／分程度である。しかしながら、第一の目標範囲Ｒ１、第二の目標範囲Ｒ２及び第三の目標範囲Ｒ３が、１～２０ｍｌ／分の液体量の範囲内に包含されるのが好ましい。すなわち、各目標範囲Ｒ１，Ｒ２，Ｒ３の下限値が１ｍｌ／分以上に設定され、上限値が２０ｍｌ／分以下に設定されるのが好ましい。液体量が１ｍｌ／分よりも少ないと、改質剤による効果を得ることができないおそれがあるからである。また、液体の量が少なすぎて液体を均等にシート５に適用することができず、液体の分布ムラが生じて品質が安定しないおそれがあるからである。更に、液体量が２０ｍｌ／分よりも多いと、シート５に適用された液体が、シート５の表面に留まらずに、後の工程の装置等に液体が付着しこれらを汚染してしまうおそれがあるからである。 As described above, in the application apparatus 1 of this embodiment, the amount of liquid supplied from the application apparatus 1 to the sheet 5 is about 10 ml / min. However, it is preferable that the first target range R1, the second target range R2, and the third target range R3 are included in the liquid amount range of 1 to 20 ml / min. That is, it is preferable that the lower limit value of each target range R1, R2, R3 is set to 1 ml / min or more and the upper limit value is set to 20 ml / min or less. This is because if the amount of liquid is less than 1 ml / min, the effect of the modifier may not be obtained. Further, the amount of the liquid is too small, so that the liquid cannot be applied to the sheet 5 evenly, and liquid distribution unevenness may occur, resulting in unstable quality. Furthermore, if the amount of liquid is more than 20 ml / min, the liquid applied to the sheet 5 may not stay on the surface of the sheet 5, but may adhere to the apparatus in the subsequent process and contaminate them. Because there is.
　これより、図４及び図５を参照しつつ、この実施例の適用装置１による、液体の適用を制御するルーチンを説明する。 Hereafter, a routine for controlling the application of the liquid by the application apparatus 1 of this embodiment will be described with reference to FIGS. 4 and 5. FIG.
　最初に、ステップ１０１では、制御器３９が搬送装置３の搬送速度が速度計３７から取得される。続くステップ１０３では、上述のように取得された搬送装置３の搬送速度に基づいて第一、第二及び第三の目標範囲Ｒ１，Ｒ２，Ｒ３が決定される。次いで、ステップ１０５では、液量計２１によって検出された液体量、つまりシート５への液体の適用量が取得される。続いて、ステップ１０６では、図２において説明された立ち上り時間が経過しているか否かが判断される。立ち上り時間が経過していなければ、ステップ１１７に進む。ステップ１０６において、立ち上り時間が経過していればステップ１０７に進む。 First, in step 101, the controller 39 acquires the transport speed of the transport device 3 from the speedometer 37. In the subsequent step 103, the first, second, and third target ranges R1, R2, and R3 are determined based on the transport speed of the transport device 3 acquired as described above. Next, in step 105, the amount of liquid detected by the liquid meter 21, that is, the amount of liquid applied to the sheet 5 is acquired. Subsequently, in step 106, it is determined whether or not the rise time described in FIG. 2 has elapsed. If the rise time has not elapsed, the process proceeds to step 117. In step 106, if the rise time has elapsed, the process proceeds to step 107.
　ステップ１０７では、液体量が第三の目標範囲Ｒ３内にあるか否かが判断される。液体量が第三の目標範囲Ｒ３内にないならば、ステップ１０９に進む。ステップ１０９では、警報器４１が作動される。次いで、ステップ１１７に進む。ステップ１０７において、液体の適用量が第三の目標範囲Ｒ３内あるならば、ステップ１１０に進み、警報器４１が非作動にされる。次いでステップ１１１に進む。 In Step 107, it is determined whether or not the liquid amount is within the third target range R3. If the liquid amount is not within the third target range R3, the process proceeds to step 109. In step 109, the alarm device 41 is activated. Next, the process proceeds to step 117. In step 107, if the liquid application amount is within the third target range R3, the process proceeds to step 110, where the alarm device 41 is deactivated. Next, the routine proceeds to step 111.
　ステップ１１１では、液体が第二の目標範囲Ｒ２内にあるか否かが判断される。液体量が第二の目標範囲Ｒ２内にないならば、ステップ１１３に進む。ステップ１１３では、ノズル１３のノズル弁が閉鎖されかつポンプ１７の動作が停止され、シート５に対する液体の適用が停止される。続くステップ１１５では、搬送装置３が停止される。その後このルーチンが終了される。ステップ１１１において、液体量が第二の目標範囲Ｒ２内であるならば、ステップ１１７に進む。 In step 111, it is determined whether or not the liquid is within the second target range R2. If the liquid amount is not within the second target range R2, the process proceeds to step 113. In step 113, the nozzle valve of the nozzle 13 is closed and the operation of the pump 17 is stopped, and the application of the liquid to the sheet 5 is stopped. In the following step 115, the transport device 3 is stopped. This routine is then terminated. In step 111, if the liquid amount is within the second target range R2, the process proceeds to step 117.
　続くステップ１１７では、液体量が第一の目標範囲Ｒ１の上限値よりも多いか否かが判断される。液体量が第一の目標範囲Ｒ１の上限値よりも多ければ、ステップ１１９に進み、ポンプ１７の液体の供給量が減少され、さらにステップ１２５に進む。ステップ１１７において、液体量が第一の目標範囲Ｒ１の上限値よりも多くなければ、ステップ１２１に進む。ステップ１２１では、液体量が第一の目標範囲Ｒ１の下限値よりも少ないか否かが判断される。液体量が第一の目標範囲Ｒ１の下限値よりも少なければ、ステップ１２３に進み、ポンプ１７の液体の供給量が増加され、さらにステップ１２５に進む。ステップ１２１において、液体量が第一の目標範囲Ｒ１の下限値よりも少なくなければ、ステップ１２５に進む。ステップ１２５では、液体をノズル１３からシート５に適用するために、ノズル１３のノズル弁が開放される。 In the following step 117, it is determined whether or not the liquid amount is larger than the upper limit value of the first target range R1. If the liquid amount is larger than the upper limit value of the first target range R1, the process proceeds to step 119, the liquid supply amount of the pump 17 is decreased, and the process further proceeds to step 125. In step 117, if the liquid amount is not larger than the upper limit value of the first target range R1, the process proceeds to step 121. In step 121, it is determined whether or not the liquid amount is smaller than the lower limit value of the first target range R1. If the liquid amount is less than the lower limit value of the first target range R1, the process proceeds to step 123, the liquid supply amount of the pump 17 is increased, and the process further proceeds to step 125. In step 121, if the liquid amount is not smaller than the lower limit value of the first target range R1, the process proceeds to step 125. In step 125, in order to apply liquid from the nozzle 13 to the sheet 5, the nozzle valve of the nozzle 13 is opened.
　最後にステップ１２７において、吸収性物品の生産が終了されるか否かが判断される。吸収性物品の生産が終了されるならば、このルーチンが終了される。生産が続行されるのであればステップ１０１に戻って上述のステップが繰り返される。 Finally, in step 127, it is determined whether or not the production of the absorbent article is finished. If the production of the absorbent article is finished, this routine is finished. If production is continued, the process returns to step 101 and the above steps are repeated.
　別の実施例では、流量計２１により検出された液体量、液体量が目標範囲内にあるか否かの判断結果、及び液体量のうち少なくとも１つが、制御器３９の出力ポートと接続されたディスプレイ（図示しない）に表示される。この場合、ユーザは、ディスプレイの表示に基づいて、手動でポンプ１７の供給量を制御することができる。 In another embodiment, at least one of the liquid amount detected by the flow meter 21, the determination result of whether or not the liquid amount is within the target range, and the liquid amount is connected to the output port of the controller 39. It is displayed on a display (not shown). In this case, the user can manually control the supply amount of the pump 17 based on the display.
　これまで述べてきた実施例では、おおまかに言うと、液体量が第一の目標範囲Ｒ１内にあるかの判断及びその判断結果に基づく制御、液体量が第二の目標範囲Ｒ２内にあるかの判断及びその判断結果に基づく制御、並びに液体量が第三の目標範囲Ｒ３内にあるかの判断及びその判断結果に基づく制御が行われる。別の実施例では、これら３つのうち少なくとも１つが行われる。 In the embodiments described so far, roughly speaking, it is determined whether the liquid amount is within the first target range R1, and control based on the determination result, whether the liquid amount is within the second target range R2. And the control based on the determination result, the determination whether the liquid amount is within the third target range R3, and the control based on the determination result. In another embodiment, at least one of these three is performed.
　本発明の実施例では、制御器３９は、液量計２１によって検出された流量が目標範囲内にあるか否かを判断する判断装置と、判断装置により、液量計２１によって検出された液体の量が第一の目標範囲Ｒ１外であると判断されたときに、液量計２１によって検出された液体の量が第一の目標範囲Ｒ１内になるように、ポンプ１７の供給量を制御する制御装置と、判断装置により、液量計によって検出された液体の量が第二の目標範囲Ｒ２外であると判断されたときに、適用装置１の適用作用を停止させる適用停止装置と、液量計２１によって検出された液体の量が第二の目標範囲Ｒ２外であると判断されたときに、搬送装置３を停止させる搬送停止装置と、判断装置により、液量計２１によって検出された液体の量が第三の目標範囲Ｒ３外であると判断されたときに、警報器４１を作動させる警報装置と、を構成する。 In the embodiment of the present invention, the controller 39 determines whether or not the flow rate detected by the liquid meter 21 is within the target range, and the liquid detected by the liquid meter 21 by the determination device. When it is determined that the amount of liquid is outside the first target range R1, the supply amount of the pump 17 is controlled so that the amount of liquid detected by the liquid meter 21 is within the first target range R1. An application stopping device that stops the application operation of the application device 1 when the control device and the determination device determine that the amount of liquid detected by the liquid meter is outside the second target range R2. When it is determined that the amount of the liquid detected by the liquid meter 21 is outside the second target range R2, it is detected by the liquid meter 21 by the transport stop device that stops the transport device 3 and the determination device. The amount of liquid outside the third target range R3 When it is determined that constitute a warning device for actuating the alarm 41.
　また、これまで述べてきた実施例では、適用装置１が備えるノズル１３は１つのみである。しかしながら、別の例では、適用装置１は複数のノズル１３を備える。この場合、適応装置１は、ノズル１３の数に対応する数の液量計２１を備えることができる。更に別の例では、複数のノズル１３に対し共通の１つの液量計２１を設けることもできる。 Further, in the embodiment described so far, the application apparatus 1 has only one nozzle 13. However, in another example, the application apparatus 1 includes a plurality of nozzles 13. In this case, the adaptation apparatus 1 can include a number of liquid meters 21 corresponding to the number of nozzles 13. In yet another example, one common liquid meter 21 can be provided for the plurality of nozzles 13.
　ところで、製造された生理用ナプキンが３つ又は４つに折りたたまれて個別に包装される場合がある。この場合、生理用ナプキンのトップシートとバックシートとが互いに接触する。一方、生理用ナプキンのバックシートには生理用ナプキンとショーツとを接着するための接着剤が通常適用されている。このため、トップシートを構成するシート５への液体の適用量が過剰であると、この液体が、シート５に留まらずにバックシートの接着剤に到達し、接着剤の接着力を低下させるおそれがある。したがって、製造対象となる吸収性物品が生理用ナプキンである場合には、製造対象となる吸収性物品が紙オムツである場合よりも、液体量がさらに厳密に管理される必要がある。 By the way, the manufactured sanitary napkin may be folded into three or four and individually wrapped. In this case, the top sheet and the back sheet of the sanitary napkin are in contact with each other. On the other hand, an adhesive for bonding the sanitary napkin and the shorts is usually applied to the back sheet of the sanitary napkin. For this reason, when the application amount of the liquid to the sheet 5 constituting the top sheet is excessive, the liquid may reach the adhesive of the back sheet without staying on the sheet 5, and may reduce the adhesive strength of the adhesive. There is. Therefore, when the absorbent article to be manufactured is a sanitary napkin, the amount of liquid needs to be managed more strictly than when the absorbent article to be manufactured is a paper diaper.
　なお、本明細書、図面及び特許請求の範囲から当業者によって理解されることのできるような全ての特徴は、これらの特徴が特定の他の特徴に関連してのみ組み合わされて説明されたとしても、それらの特徴が明確に除外されない限り、又は技術的な態様が不可能な若しくは意味のない組み合わせにならない限りにおいて、独立して、またさらに、ここで開示された他の特徴又は特徴の複数の群と任意に組み合わせて、結合されることができるものとする。 It should be noted that all features that can be understood by those skilled in the art from the specification, drawings, and claims are described as a combination of these features only in relation to certain other features. Unless the features are expressly excluded or the technical aspects are not impossible or meaningless combinations, independently and in addition to other features or features disclosed herein. And can be combined in any combination.
　１　　適用装置
　３　　搬送装置
　５　　シート
　１１　　タンク
　１３　　ノズル
　１５　　チューブ
　１７　　ポンプ
　２１　　液量計 DESCRIPTION OF SYMBOLS 1 Applicable apparatus 3 Conveyance apparatus 5 Sheet 11 Tank 13 Nozzle 15 Tube 17 Pump 21 Fluid meter

Claims (9)

  1. 　搬送装置によって搬送されている吸収性物品の製品、半製品又は素材に対して、０．０５～４Ｐａ・ｓの範囲の粘度を有する液体を適用する適用装置であって、
    　　　前記液体を収容するタンクと、
    　　　前記液体を前記製品、半製品又は素材に対して適用するノズルと、
    　　　前記タンク内の液体を、チューブを介して前記ノズルに供給するポンプと、
    　　　前記ポンプから前記ノズルに供給される液体の量を検出するために、前記ポンプと前記ノズルとの間の前記チューブに配置された液量計と、
    　を具備する、
    　適用装置。     An application device that applies a liquid having a viscosity in the range of 0.05 to 4 Pa · s to a product, semi-finished product, or material of an absorbent article that is being transported by a transport device,
    A tank containing the liquid;
    A nozzle for applying the liquid to the product, semi-finished product or material;
    A pump for supplying the liquid in the tank to the nozzle via a tube;
    A liquid meter disposed in the tube between the pump and the nozzle to detect the amount of liquid supplied from the pump to the nozzle;
    Comprising
    Applicable equipment.
  2. 　前記液量計によって検出された液体の量に基づいて、ポンプの供給量を制御する、
    　請求項１に記載の適用装置。     Based on the amount of liquid detected by the liquid meter, the supply amount of the pump is controlled.
    The application apparatus according to claim 1.
  3. 　前記液量計によって検出された流量が目標範囲内にあるか否かを判断する判断装置をさらに具備する、
    　請求項１又は２に記載の適用装置。     A judgment device for judging whether the flow rate detected by the liquid meter is within a target range;
    The application apparatus according to claim 1 or 2.
  4. 　前記目標範囲は第一の目標範囲を含み、
    　前記判断装置により、前記液量計によって検出された液体の量が前記第一の目標範囲外であると判断されたときに、前記液量計によって検出された液体の量が前記第一の目標範囲内になるように、前記ポンプの供給量を制御する制御装置をさらに備える、
    　請求項３に記載の適用装置。     The target range includes a first target range;
    When the determination device determines that the amount of liquid detected by the liquid meter is outside the first target range, the amount of liquid detected by the liquid meter is the first target. A control device for controlling the supply amount of the pump so as to be within a range;
    The application apparatus according to claim 3.
  5. 　前記目標範囲は第二の目標範囲を含み、
    　前記判断装置により、前記液量計によって検出された液体の量が前記第二の目標範囲外であると判断されたときに、前記適用装置の適用作用を停止させる適用停止装置をさらに備える、
    　請求項３～４のいずれか１項に記載の適用装置。     The target range includes a second target range;
    An application stop device for stopping the application action of the application device when the determination device determines that the amount of liquid detected by the liquid meter is outside the second target range;
    The application apparatus according to any one of claims 3 to 4.
  6. 　前記判断装置により、前記液量計によって検出された液体の量が前記第二の目標範囲外であると判断されたときに、前記搬送装置を停止させる搬送停止装置をさらに備える、
    　請求項５に記載の適用装置。     A transport stop device that stops the transport device when the determination device determines that the amount of liquid detected by the liquid meter is outside the second target range;
    The application apparatus according to claim 5.
  7. 　前記目標範囲は第三の目標範囲を含み、
    　前記判断装置により、前記液量計によって検出された液体の量が前記第三の目標範囲外であると判断されたときに、警報器を作動させる警報装置をさらに備える、
    　請求項３～６のいずれか１項に記載の適用装置。     The target range includes a third target range;
    An alarm device that activates an alarm device when the determination device determines that the amount of liquid detected by the liquid meter is outside the third target range;
    The application apparatus according to any one of claims 3 to 6.
  8. 　前記目標範囲が、前記搬送装置の搬送速度に応じて定められる、
    　請求項３～７のいずれか１項に記載の適用装置。     The target range is determined according to a transport speed of the transport device;
    The application apparatus according to any one of claims 3 to 7.
  9. 　搬送装置によって搬送されている吸収性物品の製品、半製品又は素材に対して、０．０５～４Ｐａ・ｓの範囲の粘度を有する液体を適用する方法であって、
    　　　　　　　　　前記液体を収容するタンクと、
    　　　　　　　　　前記液体を前記製品、半製品又は素材に対して適用するノズルと、
    　　　　　　　　　前記タンク内の液体を、チューブを介して前記ノズルに供給するポンプと、
    　　　　　　　　　前記ポンプからノズルに供給される液体の量を検出するために、前記ポンプと前記ノズルとの間のチューブに配置された液量計と、
    　　　　　　　を具備する、
    　　　　　適用装置によって、
    　　　前記吸収性物品の製品、半製品又は素材に前記液体を適用する段階と、
    　　　前記液量計によって検出された液体の量に基づいて、ポンプの供給量を制御する段階と、
    　を含む、
    　方法。     A method of applying a liquid having a viscosity in a range of 0.05 to 4 Pa · s to a product, a semi-finished product, or a material of an absorbent article being conveyed by a conveying device,
    A tank containing the liquid;
    A nozzle for applying the liquid to the product, semi-finished product or material;
    A pump for supplying the liquid in the tank to the nozzle via a tube;
    A liquid meter disposed in a tube between the pump and the nozzle to detect the amount of liquid supplied from the pump to the nozzle;
    Comprising
    Depending on the application equipment,
    Applying the liquid to a product, semi-finished product or material of the absorbent article;
    Controlling the pump supply based on the amount of liquid detected by the liquid meter;
    including,
    Method.
PCT/JP2013/054924 2012-04-02 2013-02-26 Application device and application method WO2013150835A1 (en)

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